nat.c
nat_api.c
in2out.c
+ in2out_ed.c
out2in.c
+ out2in_ed.c
nat_ipfix_logging.c
nat_det.c
+ nat_det_in2out.c
+ nat_det_out2in.c
nat_reass.c
nat_dpo.c
nat44_cli.c
+ nat44_handoff.c
+ nat44_hairpinning.c
+ nat44_classify.c
nat64.c
nat64_cli.c
nat64_in2out.c
nat66_in2out.c
nat66_out2in.c
nat_affinity.c
+ nat_format.c
API_FILES
nat.api
f64 last_heard;
u64 total_bytes;
u32 total_pkts;
- u32 outside_address_index;
}) dslite_session_t;
/* *INDENT-ON* */
u32 oldest_index;
dslite_session_t *s;
snat_session_key_t out2in_key;
- u32 address_index;
out2in_key.protocol = in2out_key->proto;
out2in_key.fib_index = 0;
&out2in_kv, 0);
snat_free_outside_address_and_port (dm->addr_pool, thread_index,
&s->out2in);
- s->outside_address_index = ~0;
if (snat_alloc_outside_address_and_port
(dm->addr_pool, 0, thread_index, &out2in_key,
- &s->outside_address_index, dm->port_per_thread, thread_index))
+ dm->port_per_thread, thread_index))
ASSERT (0);
}
else
{
if (snat_alloc_outside_address_and_port
- (dm->addr_pool, 0, thread_index, &out2in_key, &address_index,
+ (dm->addr_pool, 0, thread_index, &out2in_key,
dm->port_per_thread, thread_index))
{
*error = DSLITE_ERROR_OUT_OF_PORTS;
}
pool_get (dm->per_thread_data[thread_index].sessions, s);
memset (s, 0, sizeof (*s));
- s->outside_address_index = address_index;
b4->nsessions++;
pool_get (dm->per_thread_data[thread_index].list_pool, elt);
* See the License for the specific language governing permissions and
* limitations under the License.
*/
+/**
+ * @file
+ * @brief NAT44 inside to outside network translation
+ */
#include <vlib/vlib.h>
#include <vnet/vnet.h>
#include <vnet/pg/pg.h>
-#include <vnet/handoff.h>
#include <vnet/ip/ip.h>
#include <vnet/ethernet/ethernet.h>
#include <vnet/fib/ip4_fib.h>
#include <nat/nat.h>
#include <nat/nat_ipfix_logging.h>
-#include <nat/nat_det.h>
#include <nat/nat_reass.h>
#include <nat/nat_inlines.h>
#include <vppinfra/error.h>
#include <vppinfra/elog.h>
-typedef struct {
+typedef struct
+{
u32 sw_if_index;
u32 next_index;
u32 session_index;
u32 is_slow_path;
} snat_in2out_trace_t;
-typedef struct {
- u32 next_worker_index;
- u8 do_handoff;
-} snat_in2out_worker_handoff_trace_t;
-
/* packet trace format function */
-static u8 * format_snat_in2out_trace (u8 * s, va_list * args)
+static u8 *
+format_snat_in2out_trace (u8 * s, va_list * args)
{
CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
- snat_in2out_trace_t * t = va_arg (*args, snat_in2out_trace_t *);
- char * tag;
+ snat_in2out_trace_t *t = va_arg (*args, snat_in2out_trace_t *);
+ char *tag;
tag = t->is_slow_path ? "NAT44_IN2OUT_SLOW_PATH" : "NAT44_IN2OUT_FAST_PATH";
s = format (s, "%s: sw_if_index %d, next index %d, session %d", tag,
- t->sw_if_index, t->next_index, t->session_index);
+ t->sw_if_index, t->next_index, t->session_index);
return s;
}
-static u8 * format_snat_in2out_fast_trace (u8 * s, va_list * args)
+static u8 *
+format_snat_in2out_fast_trace (u8 * s, va_list * args)
{
CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
- snat_in2out_trace_t * t = va_arg (*args, snat_in2out_trace_t *);
+ snat_in2out_trace_t *t = va_arg (*args, snat_in2out_trace_t *);
s = format (s, "NAT44_IN2OUT_FAST: sw_if_index %d, next index %d",
- t->sw_if_index, t->next_index);
-
- return s;
-}
-
-static u8 * format_snat_in2out_worker_handoff_trace (u8 * s, va_list * args)
-{
- CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
- CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
- snat_in2out_worker_handoff_trace_t * t =
- va_arg (*args, snat_in2out_worker_handoff_trace_t *);
- char * m;
-
- m = t->do_handoff ? "next worker" : "same worker";
- s = format (s, "NAT44_IN2OUT_WORKER_HANDOFF: %s %d", m, t->next_worker_index);
-
- return s;
-}
-
-typedef struct {
- u32 sw_if_index;
- u32 next_index;
- u8 cached;
-} nat44_in2out_reass_trace_t;
-
-static u8 * format_nat44_in2out_reass_trace (u8 * s, va_list * args)
-{
- CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
- CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
- nat44_in2out_reass_trace_t * t = va_arg (*args, nat44_in2out_reass_trace_t *);
-
- s = format (s, "NAT44_IN2OUT_REASS: sw_if_index %d, next index %d, status %s",
- t->sw_if_index, t->next_index,
- t->cached ? "cached" : "translated");
+ t->sw_if_index, t->next_index);
return s;
}
vlib_node_registration_t snat_in2out_node;
vlib_node_registration_t snat_in2out_slowpath_node;
vlib_node_registration_t snat_in2out_fast_node;
-vlib_node_registration_t snat_in2out_worker_handoff_node;
-vlib_node_registration_t snat_det_in2out_node;
vlib_node_registration_t snat_in2out_output_node;
vlib_node_registration_t snat_in2out_output_slowpath_node;
-vlib_node_registration_t snat_in2out_output_worker_handoff_node;
-vlib_node_registration_t snat_hairpin_dst_node;
-vlib_node_registration_t snat_hairpin_src_node;
-vlib_node_registration_t nat44_hairpinning_node;
vlib_node_registration_t nat44_in2out_reass_node;
-vlib_node_registration_t nat44_ed_in2out_node;
-vlib_node_registration_t nat44_ed_in2out_slowpath_node;
-vlib_node_registration_t nat44_ed_in2out_output_node;
-vlib_node_registration_t nat44_ed_in2out_output_slowpath_node;
-vlib_node_registration_t nat44_ed_hairpin_dst_node;
-vlib_node_registration_t nat44_ed_hairpin_src_node;
-vlib_node_registration_t nat44_ed_hairpinning_node;
-vlib_node_registration_t nat44_ed_in2out_reass_node;
#define foreach_snat_in2out_error \
_(UNSUPPORTED_PROTOCOL, "Unsupported protocol") \
_(MAX_SESSIONS_EXCEEDED, "Maximum sessions exceeded") \
_(DROP_FRAGMENT, "Drop fragment") \
_(MAX_REASS, "Maximum reassemblies exceeded") \
-_(MAX_FRAG, "Maximum fragments per reassembly exceeded")\
-_(FQ_CONGESTED, "Handoff frame queue congested")
+_(MAX_FRAG, "Maximum fragments per reassembly exceeded")
-typedef enum {
+typedef enum
+{
#define _(sym,str) SNAT_IN2OUT_ERROR_##sym,
foreach_snat_in2out_error
#undef _
- SNAT_IN2OUT_N_ERROR,
+ SNAT_IN2OUT_N_ERROR,
} snat_in2out_error_t;
-static char * snat_in2out_error_strings[] = {
+static char *snat_in2out_error_strings[] = {
#define _(sym,string) string,
foreach_snat_in2out_error
#undef _
};
-typedef enum {
+typedef enum
+{
SNAT_IN2OUT_NEXT_LOOKUP,
SNAT_IN2OUT_NEXT_DROP,
SNAT_IN2OUT_NEXT_ICMP_ERROR,
SNAT_IN2OUT_N_NEXT,
} snat_in2out_next_t;
-typedef enum {
- SNAT_HAIRPIN_SRC_NEXT_DROP,
- SNAT_HAIRPIN_SRC_NEXT_SNAT_IN2OUT,
- SNAT_HAIRPIN_SRC_NEXT_SNAT_IN2OUT_WH,
- SNAT_HAIRPIN_SRC_NEXT_INTERFACE_OUTPUT,
- SNAT_HAIRPIN_SRC_N_NEXT,
-} snat_hairpin_next_t;
-
-/**
- * @brief Check if packet should be translated
- *
- * Packets aimed at outside interface and external address with active session
- * should be translated.
- *
- * @param sm NAT main
- * @param rt NAT runtime data
- * @param sw_if_index0 index of the inside interface
- * @param ip0 IPv4 header
- * @param proto0 NAT protocol
- * @param rx_fib_index0 RX FIB index
- *
- * @returns 0 if packet should be translated otherwise 1
- */
-static inline int
-snat_not_translate_fast (snat_main_t * sm, vlib_node_runtime_t *node,
- u32 sw_if_index0, ip4_header_t * ip0, u32 proto0,
- u32 rx_fib_index0)
-{
- if (sm->out2in_dpo)
- return 0;
-
- fib_node_index_t fei = FIB_NODE_INDEX_INVALID;
- nat_outside_fib_t *outside_fib;
- fib_prefix_t pfx = {
- .fp_proto = FIB_PROTOCOL_IP4,
- .fp_len = 32,
- .fp_addr = {
- .ip4.as_u32 = ip0->dst_address.as_u32,
- },
- };
-
- /* Don't NAT packet aimed at the intfc address */
- if (PREDICT_FALSE(is_interface_addr(sm, node, sw_if_index0,
- ip0->dst_address.as_u32)))
- return 1;
-
- fei = fib_table_lookup (rx_fib_index0, &pfx);
- if (FIB_NODE_INDEX_INVALID != fei)
- {
- u32 sw_if_index = fib_entry_get_resolving_interface (fei);
- if (sw_if_index == ~0)
- {
- vec_foreach (outside_fib, sm->outside_fibs)
- {
- fei = fib_table_lookup (outside_fib->fib_index, &pfx);
- if (FIB_NODE_INDEX_INVALID != fei)
- {
- sw_if_index = fib_entry_get_resolving_interface (fei);
- if (sw_if_index != ~0)
- break;
- }
- }
- }
- if (sw_if_index == ~0)
- return 1;
-
- snat_interface_t *i;
- pool_foreach (i, sm->interfaces,
- ({
- /* NAT packet aimed at outside interface */
- if ((nat_interface_is_outside(i)) && (sw_if_index == i->sw_if_index))
- return 0;
- }));
- }
-
- return 1;
-}
-
static inline int
-snat_not_translate (snat_main_t * sm, vlib_node_runtime_t *node,
- u32 sw_if_index0, ip4_header_t * ip0, u32 proto0,
- u32 rx_fib_index0, u32 thread_index)
+snat_not_translate (snat_main_t * sm, vlib_node_runtime_t * node,
+ u32 sw_if_index0, ip4_header_t * ip0, u32 proto0,
+ u32 rx_fib_index0, u32 thread_index)
{
- udp_header_t * udp0 = ip4_next_header (ip0);
+ udp_header_t *udp0 = ip4_next_header (ip0);
snat_session_key_t key0, sm0;
clib_bihash_kv_8_8_t kv0, value0;
/* NAT packet aimed at external address if */
/* has active sessions */
if (clib_bihash_search_8_8 (&sm->per_thread_data[thread_index].out2in, &kv0,
- &value0))
+ &value0))
{
/* or is static mappings */
- if (!snat_static_mapping_match(sm, key0, &sm0, 1, 0, 0, 0, 0))
- return 0;
+ if (!snat_static_mapping_match (sm, key0, &sm0, 1, 0, 0, 0, 0))
+ return 0;
}
else
return 0;
if (sm->forwarding_enabled)
return 1;
- return snat_not_translate_fast(sm, node, sw_if_index0, ip0, proto0,
- rx_fib_index0);
+ return snat_not_translate_fast (sm, node, sw_if_index0, ip0, proto0,
+ rx_fib_index0);
}
static inline int
nat_not_translate_output_feature (snat_main_t * sm, ip4_header_t * ip0,
- u32 proto0, u16 src_port, u16 dst_port,
- u32 thread_index, u32 sw_if_index)
+ u32 proto0, u16 src_port, u16 dst_port,
+ u32 thread_index, u32 sw_if_index)
{
snat_session_key_t key0;
clib_bihash_kv_8_8_t kv0, value0;
key0.fib_index = ip4_fib_table_get_index_for_sw_if_index (sw_if_index);
kv0.key = key0.as_u64;
- if (!clib_bihash_search_8_8 (&sm->per_thread_data[thread_index].out2in, &kv0,
- &value0))
+ if (!clib_bihash_search_8_8
+ (&sm->per_thread_data[thread_index].out2in, &kv0, &value0))
return 1;
/* dst NAT check */
key0.port = dst_port;
key0.protocol = proto0;
kv0.key = key0.as_u64;
- if (!clib_bihash_search_8_8 (&sm->per_thread_data[thread_index].in2out, &kv0,
- &value0))
- {
- /* hairpinning */
+ if (!clib_bihash_search_8_8
+ (&sm->per_thread_data[thread_index].in2out, &kv0, &value0))
+ {
+ /* hairpinning */
+ /* *INDENT-OFF* */
pool_foreach (i, sm->output_feature_interfaces,
({
if ((nat_interface_is_inside(i)) && (sw_if_index == i->sw_if_index))
return 0;
}));
- return 1;
- }
+ /* *INDENT-ON* */
+ return 1;
+ }
return 0;
}
int
-nat44_i2o_is_idle_session_cb (clib_bihash_kv_8_8_t * kv, void * arg)
+nat44_i2o_is_idle_session_cb (clib_bihash_kv_8_8_t * kv, void *arg)
{
snat_main_t *sm = &snat_main;
nat44_is_idle_session_ctx_t *ctx = arg;
snat_session_t *s;
u64 sess_timeout_time;
snat_main_per_thread_data_t *tsm = vec_elt_at_index (sm->per_thread_data,
- ctx->thread_index);
+ ctx->thread_index);
clib_bihash_kv_8_8_t s_kv;
s = pool_elt_at_index (tsm->sessions, kv->value);
- sess_timeout_time = s->last_heard + (f64)nat44_session_get_timeout(sm, s);
+ sess_timeout_time = s->last_heard + (f64) nat44_session_get_timeout (sm, s);
if (ctx->now >= sess_timeout_time)
{
s_kv.key = s->out2in.as_u64;
if (clib_bihash_add_del_8_8 (&tsm->out2in, &s_kv, 0))
- nat_log_warn ("out2in key del failed");
+ nat_log_warn ("out2in key del failed");
- snat_ipfix_logging_nat44_ses_delete(s->in2out.addr.as_u32,
- s->out2in.addr.as_u32,
- s->in2out.protocol,
- s->in2out.port,
- s->out2in.port,
- s->in2out.fib_index);
+ snat_ipfix_logging_nat44_ses_delete (s->in2out.addr.as_u32,
+ s->out2in.addr.as_u32,
+ s->in2out.protocol,
+ s->in2out.port,
+ s->out2in.port,
+ s->in2out.fib_index);
if (!snat_is_session_static (s))
- snat_free_outside_address_and_port (sm->addresses, ctx->thread_index,
- &s->out2in);
+ snat_free_outside_address_and_port (sm->addresses, ctx->thread_index,
+ &s->out2in);
nat44_delete_session (sm, s, ctx->thread_index);
return 1;
return 0;
}
-static u32 slow_path (snat_main_t *sm, vlib_buffer_t *b0,
- ip4_header_t * ip0,
- u32 rx_fib_index0,
- snat_session_key_t * key0,
- snat_session_t ** sessionp,
- vlib_node_runtime_t * node,
- u32 next0,
- u32 thread_index,
- f64 now)
+static u32
+slow_path (snat_main_t * sm, vlib_buffer_t * b0,
+ ip4_header_t * ip0,
+ u32 rx_fib_index0,
+ snat_session_key_t * key0,
+ snat_session_t ** sessionp,
+ vlib_node_runtime_t * node, u32 next0, u32 thread_index, f64 now)
{
snat_user_t *u;
snat_session_t *s;
clib_bihash_kv_8_8_t kv0;
snat_session_key_t key1;
- u32 address_index = ~0;
- udp_header_t * udp0 = ip4_next_header (ip0);
+ udp_header_t *udp0 = ip4_next_header (ip0);
u8 is_sm = 0;
nat_outside_fib_t *outside_fib;
fib_node_index_t fei = FIB_NODE_INDEX_INVALID;
.fp_proto = FIB_PROTOCOL_IP4,
.fp_len = 32,
.fp_addr = {
- .ip4.as_u32 = ip0->dst_address.as_u32,
- },
+ .ip4.as_u32 = ip0->dst_address.as_u32,
+ },
};
nat44_is_idle_session_ctx_t ctx0;
- if (PREDICT_FALSE (maximum_sessions_exceeded(sm, thread_index)))
+ if (PREDICT_FALSE (maximum_sessions_exceeded (sm, thread_index)))
{
b0->error = node->errors[SNAT_IN2OUT_ERROR_MAX_SESSIONS_EXCEEDED];
- nat_ipfix_logging_max_sessions(sm->max_translations);
+ nat_ipfix_logging_max_sessions (sm->max_translations);
nat_log_notice ("maximum sessions exceeded");
return SNAT_IN2OUT_NEXT_DROP;
}
{
/* Try to create dynamic translation */
if (snat_alloc_outside_address_and_port (sm->addresses, rx_fib_index0,
- thread_index, &key1,
- &address_index,
- sm->port_per_thread,
- sm->per_thread_data[thread_index].snat_thread_index))
- {
- b0->error = node->errors[SNAT_IN2OUT_ERROR_OUT_OF_PORTS];
- return SNAT_IN2OUT_NEXT_DROP;
- }
+ thread_index, &key1,
+ sm->port_per_thread,
+ sm->per_thread_data
+ [thread_index].snat_thread_index))
+ {
+ b0->error = node->errors[SNAT_IN2OUT_ERROR_OUT_OF_PORTS];
+ return SNAT_IN2OUT_NEXT_DROP;
+ }
}
else
is_sm = 1;
u = nat_user_get_or_create (sm, &ip0->src_address, rx_fib_index0,
- thread_index);
+ thread_index);
if (!u)
{
nat_log_warn ("create NAT user failed");
if (is_sm)
s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING;
user_session_increment (sm, u, is_sm);
- s->outside_address_index = address_index;
s->in2out = *key0;
s->out2in = key1;
s->out2in.protocol = key0->protocol;
s->out2in.fib_index = sm->outside_fibs[0].fib_index;
break;
default:
+ /* *INDENT-OFF* */
vec_foreach (outside_fib, sm->outside_fibs)
{
fei = fib_table_lookup (outside_fib->fib_index, &pfx);
}
}
}
+ /* *INDENT-ON* */
break;
}
s->ext_host_addr.as_u32 = ip0->dst_address.as_u32;
ctx0.thread_index = thread_index;
kv0.key = s->in2out.as_u64;
kv0.value = s - sm->per_thread_data[thread_index].sessions;
- if (clib_bihash_add_or_overwrite_stale_8_8 (
- &sm->per_thread_data[thread_index].in2out, &kv0,
- nat44_i2o_is_idle_session_cb, &ctx0))
- nat_log_notice ("in2out key add failed");
+ if (clib_bihash_add_or_overwrite_stale_8_8
+ (&sm->per_thread_data[thread_index].in2out, &kv0,
+ nat44_i2o_is_idle_session_cb, &ctx0))
+ nat_log_notice ("in2out key add failed");
kv0.key = s->out2in.as_u64;
kv0.value = s - sm->per_thread_data[thread_index].sessions;
- if (clib_bihash_add_or_overwrite_stale_8_8 (
- &sm->per_thread_data[thread_index].out2in, &kv0,
- nat44_o2i_is_idle_session_cb, &ctx0))
- nat_log_notice ("out2in key add failed");
+ if (clib_bihash_add_or_overwrite_stale_8_8
+ (&sm->per_thread_data[thread_index].out2in, &kv0,
+ nat44_o2i_is_idle_session_cb, &ctx0))
+ nat_log_notice ("out2in key add failed");
/* log NAT event */
- snat_ipfix_logging_nat44_ses_create(s->in2out.addr.as_u32,
- s->out2in.addr.as_u32,
- s->in2out.protocol,
- s->in2out.port,
- s->out2in.port,
- s->in2out.fib_index);
+ snat_ipfix_logging_nat44_ses_create (s->in2out.addr.as_u32,
+ s->out2in.addr.as_u32,
+ s->in2out.protocol,
+ s->in2out.port,
+ s->out2in.port, s->in2out.fib_index);
return next0;
}
static_always_inline
-snat_in2out_error_t icmp_get_key(ip4_header_t *ip0,
- snat_session_key_t *p_key0)
+ snat_in2out_error_t icmp_get_key (ip4_header_t * ip0,
+ snat_session_key_t * p_key0)
{
icmp46_header_t *icmp0;
snat_session_key_t key0;
icmp46_header_t *inner_icmp0;
icmp0 = (icmp46_header_t *) ip4_next_header (ip0);
- echo0 = (icmp_echo_header_t *)(icmp0+1);
+ echo0 = (icmp_echo_header_t *) (icmp0 + 1);
if (!icmp_is_error_message (icmp0))
{
}
else
{
- inner_ip0 = (ip4_header_t *)(echo0+1);
+ inner_ip0 = (ip4_header_t *) (echo0 + 1);
l4_header = ip4_next_header (inner_ip0);
key0.protocol = ip_proto_to_snat_proto (inner_ip0->protocol);
key0.addr = inner_ip0->dst_address;
switch (key0.protocol)
- {
- case SNAT_PROTOCOL_ICMP:
- inner_icmp0 = (icmp46_header_t*)l4_header;
- inner_echo0 = (icmp_echo_header_t *)(inner_icmp0+1);
- key0.port = inner_echo0->identifier;
- break;
- case SNAT_PROTOCOL_UDP:
- case SNAT_PROTOCOL_TCP:
- key0.port = ((tcp_udp_header_t*)l4_header)->dst_port;
- break;
- default:
- return SNAT_IN2OUT_ERROR_UNSUPPORTED_PROTOCOL;
- }
+ {
+ case SNAT_PROTOCOL_ICMP:
+ inner_icmp0 = (icmp46_header_t *) l4_header;
+ inner_echo0 = (icmp_echo_header_t *) (inner_icmp0 + 1);
+ key0.port = inner_echo0->identifier;
+ break;
+ case SNAT_PROTOCOL_UDP:
+ case SNAT_PROTOCOL_TCP:
+ key0.port = ((tcp_udp_header_t *) l4_header)->dst_port;
+ break;
+ default:
+ return SNAT_IN2OUT_ERROR_UNSUPPORTED_PROTOCOL;
+ }
}
*p_key0 = key0;
- return -1; /* success */
+ return -1; /* success */
}
/**
* @param d optional parameter
* @param e optional parameter
*/
-u32 icmp_match_in2out_slow(snat_main_t *sm, vlib_node_runtime_t *node,
- u32 thread_index, vlib_buffer_t *b0,
- ip4_header_t *ip0, u8 *p_proto,
- snat_session_key_t *p_value,
- u8 *p_dont_translate, void *d, void *e)
+u32
+icmp_match_in2out_slow (snat_main_t * sm, vlib_node_runtime_t * node,
+ u32 thread_index, vlib_buffer_t * b0,
+ ip4_header_t * ip0, u8 * p_proto,
+ snat_session_key_t * p_value,
+ u8 * p_dont_translate, void *d, void *e)
{
icmp46_header_t *icmp0;
u32 sw_if_index0;
int err;
icmp0 = (icmp46_header_t *) ip4_next_header (ip0);
- sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
rx_fib_index0 = ip4_fib_table_get_index_for_sw_if_index (sw_if_index0);
err = icmp_get_key (ip0, &key0);
kv0.key = key0.as_u64;
if (clib_bihash_search_8_8 (&sm->per_thread_data[thread_index].in2out, &kv0,
- &value0))
+ &value0))
{
- if (vnet_buffer(b0)->sw_if_index[VLIB_TX] != ~0)
- {
- if (PREDICT_FALSE(nat_not_translate_output_feature(sm, ip0,
- key0.protocol, key0.port, key0.port, thread_index, sw_if_index0)))
- {
- dont_translate = 1;
- goto out;
- }
- }
+ if (vnet_buffer (b0)->sw_if_index[VLIB_TX] != ~0)
+ {
+ if (PREDICT_FALSE (nat_not_translate_output_feature (sm, ip0,
+ key0.protocol,
+ key0.port,
+ key0.port,
+ thread_index,
+ sw_if_index0)))
+ {
+ dont_translate = 1;
+ goto out;
+ }
+ }
else
- {
- if (PREDICT_FALSE(snat_not_translate(sm, node, sw_if_index0,
- ip0, SNAT_PROTOCOL_ICMP, rx_fib_index0, thread_index)))
- {
- dont_translate = 1;
- goto out;
- }
- }
+ {
+ if (PREDICT_FALSE (snat_not_translate (sm, node, sw_if_index0,
+ ip0, SNAT_PROTOCOL_ICMP,
+ rx_fib_index0,
+ thread_index)))
+ {
+ dont_translate = 1;
+ goto out;
+ }
+ }
- if (PREDICT_FALSE(icmp_is_error_message (icmp0)))
- {
- b0->error = node->errors[SNAT_IN2OUT_ERROR_BAD_ICMP_TYPE];
- next0 = SNAT_IN2OUT_NEXT_DROP;
- goto out;
- }
+ if (PREDICT_FALSE (icmp_is_error_message (icmp0)))
+ {
+ b0->error = node->errors[SNAT_IN2OUT_ERROR_BAD_ICMP_TYPE];
+ next0 = SNAT_IN2OUT_NEXT_DROP;
+ goto out;
+ }
next0 = slow_path (sm, b0, ip0, rx_fib_index0, &key0, &s0, node, next0,
- thread_index, vlib_time_now (sm->vlib_main));
+ thread_index, vlib_time_now (sm->vlib_main));
if (PREDICT_FALSE (next0 == SNAT_IN2OUT_NEXT_DROP))
- goto out;
+ goto out;
}
else
{
- if (PREDICT_FALSE(icmp0->type != ICMP4_echo_request &&
- icmp0->type != ICMP4_echo_reply &&
- !icmp_is_error_message (icmp0)))
- {
- b0->error = node->errors[SNAT_IN2OUT_ERROR_BAD_ICMP_TYPE];
- next0 = SNAT_IN2OUT_NEXT_DROP;
- goto out;
- }
+ if (PREDICT_FALSE (icmp0->type != ICMP4_echo_request &&
+ icmp0->type != ICMP4_echo_reply &&
+ !icmp_is_error_message (icmp0)))
+ {
+ b0->error = node->errors[SNAT_IN2OUT_ERROR_BAD_ICMP_TYPE];
+ next0 = SNAT_IN2OUT_NEXT_DROP;
+ goto out;
+ }
s0 = pool_elt_at_index (sm->per_thread_data[thread_index].sessions,
- value0.value);
+ value0.value);
}
out:
*p_value = s0->out2in;
*p_dont_translate = dont_translate;
if (d)
- *(snat_session_t**)d = s0;
+ *(snat_session_t **) d = s0;
return next0;
}
* @param d optional parameter
* @param e optional parameter
*/
-u32 icmp_match_in2out_fast(snat_main_t *sm, vlib_node_runtime_t *node,
- u32 thread_index, vlib_buffer_t *b0,
- ip4_header_t *ip0, u8 *p_proto,
- snat_session_key_t *p_value,
- u8 *p_dont_translate, void *d, void *e)
+u32
+icmp_match_in2out_fast (snat_main_t * sm, vlib_node_runtime_t * node,
+ u32 thread_index, vlib_buffer_t * b0,
+ ip4_header_t * ip0, u8 * p_proto,
+ snat_session_key_t * p_value,
+ u8 * p_dont_translate, void *d, void *e)
{
icmp46_header_t *icmp0;
u32 sw_if_index0;
int err;
icmp0 = (icmp46_header_t *) ip4_next_header (ip0);
- sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
rx_fib_index0 = ip4_fib_table_get_index_for_sw_if_index (sw_if_index0);
err = icmp_get_key (ip0, &key0);
}
key0.fib_index = rx_fib_index0;
- if (snat_static_mapping_match(sm, key0, &sm0, 0, &is_addr_only, 0, 0, 0))
+ if (snat_static_mapping_match (sm, key0, &sm0, 0, &is_addr_only, 0, 0, 0))
{
- if (PREDICT_FALSE(snat_not_translate_fast(sm, node, sw_if_index0, ip0,
- IP_PROTOCOL_ICMP, rx_fib_index0)))
- {
- dont_translate = 1;
- goto out;
- }
+ if (PREDICT_FALSE (snat_not_translate_fast (sm, node, sw_if_index0, ip0,
+ IP_PROTOCOL_ICMP,
+ rx_fib_index0)))
+ {
+ dont_translate = 1;
+ goto out;
+ }
if (icmp_is_error_message (icmp0))
- {
- next0 = SNAT_IN2OUT_NEXT_DROP;
- goto out;
- }
+ {
+ next0 = SNAT_IN2OUT_NEXT_DROP;
+ goto out;
+ }
b0->error = node->errors[SNAT_IN2OUT_ERROR_NO_TRANSLATION];
next0 = SNAT_IN2OUT_NEXT_DROP;
goto out;
}
- if (PREDICT_FALSE(icmp0->type != ICMP4_echo_request &&
- (icmp0->type != ICMP4_echo_reply || !is_addr_only) &&
- !icmp_is_error_message (icmp0)))
+ if (PREDICT_FALSE (icmp0->type != ICMP4_echo_request &&
+ (icmp0->type != ICMP4_echo_reply || !is_addr_only) &&
+ !icmp_is_error_message (icmp0)))
{
b0->error = node->errors[SNAT_IN2OUT_ERROR_BAD_ICMP_TYPE];
next0 = SNAT_IN2OUT_NEXT_DROP;
return next0;
}
-static inline u32
-snat_icmp_hairpinning (snat_main_t *sm,
- vlib_buffer_t * b0,
- ip4_header_t * ip0,
- icmp46_header_t * icmp0,
- int is_ed);
-
-static inline u32 icmp_in2out (snat_main_t *sm,
- vlib_buffer_t * b0,
- ip4_header_t * ip0,
- icmp46_header_t * icmp0,
- u32 sw_if_index0,
- u32 rx_fib_index0,
- vlib_node_runtime_t * node,
- u32 next0,
- u32 thread_index,
- void *d,
- void *e)
+u32
+icmp_in2out (snat_main_t * sm,
+ vlib_buffer_t * b0,
+ ip4_header_t * ip0,
+ icmp46_header_t * icmp0,
+ u32 sw_if_index0,
+ u32 rx_fib_index0,
+ vlib_node_runtime_t * node,
+ u32 next0, u32 thread_index, void *d, void *e)
{
snat_session_key_t sm0;
u8 protocol;
u16 checksum0;
u32 next0_tmp;
- echo0 = (icmp_echo_header_t *)(icmp0+1);
+ echo0 = (icmp_echo_header_t *) (icmp0 + 1);
- next0_tmp = sm->icmp_match_in2out_cb(sm, node, thread_index, b0, ip0,
- &protocol, &sm0, &dont_translate, d, e);
+ next0_tmp = sm->icmp_match_in2out_cb (sm, node, thread_index, b0, ip0,
+ &protocol, &sm0, &dont_translate, d,
+ e);
if (next0_tmp != ~0)
next0 = next0_tmp;
if (next0 == SNAT_IN2OUT_NEXT_DROP || dont_translate)
if (PREDICT_TRUE (!ip4_is_fragment (ip0)))
{
sum0 = ip_incremental_checksum (0, icmp0,
- ntohs(ip0->length) - ip4_header_bytes (ip0));
+ ntohs (ip0->length) -
+ ip4_header_bytes (ip0));
checksum0 = ~ip_csum_fold (sum0);
- if (PREDICT_FALSE(checksum0 != 0 && checksum0 != 0xffff))
- {
- next0 = SNAT_IN2OUT_NEXT_DROP;
- goto out;
- }
+ if (PREDICT_FALSE (checksum0 != 0 && checksum0 != 0xffff))
+ {
+ next0 = SNAT_IN2OUT_NEXT_DROP;
+ goto out;
+ }
}
old_addr0 = ip0->src_address.as_u32;
sum0 = ip0->checksum;
sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
- src_address /* changed member */);
+ src_address /* changed member */ );
ip0->checksum = ip_csum_fold (sum0);
if (icmp0->checksum == 0)
if (!icmp_is_error_message (icmp0))
{
new_id0 = sm0.port;
- if (PREDICT_FALSE(new_id0 != echo0->identifier))
- {
- old_id0 = echo0->identifier;
- new_id0 = sm0.port;
- echo0->identifier = new_id0;
-
- sum0 = icmp0->checksum;
- sum0 = ip_csum_update (sum0, old_id0, new_id0, icmp_echo_header_t,
- identifier);
- icmp0->checksum = ip_csum_fold (sum0);
- }
+ if (PREDICT_FALSE (new_id0 != echo0->identifier))
+ {
+ old_id0 = echo0->identifier;
+ new_id0 = sm0.port;
+ echo0->identifier = new_id0;
+
+ sum0 = icmp0->checksum;
+ sum0 = ip_csum_update (sum0, old_id0, new_id0, icmp_echo_header_t,
+ identifier);
+ icmp0->checksum = ip_csum_fold (sum0);
+ }
}
else
{
- inner_ip0 = (ip4_header_t *)(echo0+1);
+ inner_ip0 = (ip4_header_t *) (echo0 + 1);
l4_header = ip4_next_header (inner_ip0);
if (!ip4_header_checksum_is_valid (inner_ip0))
- {
- next0 = SNAT_IN2OUT_NEXT_DROP;
- goto out;
- }
+ {
+ next0 = SNAT_IN2OUT_NEXT_DROP;
+ goto out;
+ }
/* update inner destination IP address */
old_addr0 = inner_ip0->dst_address.as_u32;
new_addr0 = inner_ip0->dst_address.as_u32;
sum0 = icmp0->checksum;
sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
- dst_address /* changed member */);
+ dst_address /* changed member */ );
icmp0->checksum = ip_csum_fold (sum0);
/* update inner IP header checksum */
old_checksum0 = inner_ip0->checksum;
sum0 = inner_ip0->checksum;
sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
- dst_address /* changed member */);
+ dst_address /* changed member */ );
inner_ip0->checksum = ip_csum_fold (sum0);
new_checksum0 = inner_ip0->checksum;
sum0 = icmp0->checksum;
sum0 = ip_csum_update (sum0, old_checksum0, new_checksum0, ip4_header_t,
- checksum);
+ checksum);
icmp0->checksum = ip_csum_fold (sum0);
switch (protocol)
- {
- case SNAT_PROTOCOL_ICMP:
- inner_icmp0 = (icmp46_header_t*)l4_header;
- inner_echo0 = (icmp_echo_header_t *)(inner_icmp0+1);
-
- old_id0 = inner_echo0->identifier;
- new_id0 = sm0.port;
- inner_echo0->identifier = new_id0;
-
- sum0 = icmp0->checksum;
- sum0 = ip_csum_update (sum0, old_id0, new_id0, icmp_echo_header_t,
- identifier);
- icmp0->checksum = ip_csum_fold (sum0);
- break;
- case SNAT_PROTOCOL_UDP:
- case SNAT_PROTOCOL_TCP:
- old_id0 = ((tcp_udp_header_t*)l4_header)->dst_port;
- new_id0 = sm0.port;
- ((tcp_udp_header_t*)l4_header)->dst_port = new_id0;
-
- sum0 = icmp0->checksum;
- sum0 = ip_csum_update (sum0, old_id0, new_id0, tcp_udp_header_t,
- dst_port);
- icmp0->checksum = ip_csum_fold (sum0);
- break;
- default:
- ASSERT(0);
- }
+ {
+ case SNAT_PROTOCOL_ICMP:
+ inner_icmp0 = (icmp46_header_t *) l4_header;
+ inner_echo0 = (icmp_echo_header_t *) (inner_icmp0 + 1);
+
+ old_id0 = inner_echo0->identifier;
+ new_id0 = sm0.port;
+ inner_echo0->identifier = new_id0;
+
+ sum0 = icmp0->checksum;
+ sum0 = ip_csum_update (sum0, old_id0, new_id0, icmp_echo_header_t,
+ identifier);
+ icmp0->checksum = ip_csum_fold (sum0);
+ break;
+ case SNAT_PROTOCOL_UDP:
+ case SNAT_PROTOCOL_TCP:
+ old_id0 = ((tcp_udp_header_t *) l4_header)->dst_port;
+ new_id0 = sm0.port;
+ ((tcp_udp_header_t *) l4_header)->dst_port = new_id0;
+
+ sum0 = icmp0->checksum;
+ sum0 = ip_csum_update (sum0, old_id0, new_id0, tcp_udp_header_t,
+ dst_port);
+ icmp0->checksum = ip_csum_fold (sum0);
+ break;
+ default:
+ ASSERT (0);
+ }
}
- if (vnet_buffer(b0)->sw_if_index[VLIB_TX] == ~0)
+ if (vnet_buffer (b0)->sw_if_index[VLIB_TX] == ~0)
{
if (sm->deterministic ||
- 0 != snat_icmp_hairpinning(sm, b0, ip0, icmp0,
- sm->endpoint_dependent))
- vnet_buffer(b0)->sw_if_index[VLIB_TX] = sm0.fib_index;
+ 0 != snat_icmp_hairpinning (sm, b0, ip0, icmp0,
+ sm->endpoint_dependent))
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = sm0.fib_index;
}
out:
return next0;
}
-/**
- * @brief Hairpinning
- *
- * Hairpinning allows two endpoints on the internal side of the NAT to
- * communicate even if they only use each other's external IP addresses
- * and ports.
- *
- * @param sm NAT main.
- * @param b0 Vlib buffer.
- * @param ip0 IP header.
- * @param udp0 UDP header.
- * @param tcp0 TCP header.
- * @param proto0 NAT protocol.
- */
-static inline int
-snat_hairpinning (snat_main_t *sm,
- vlib_buffer_t * b0,
- ip4_header_t * ip0,
- udp_header_t * udp0,
- tcp_header_t * tcp0,
- u32 proto0,
- int is_ed)
-{
- snat_session_key_t key0, sm0;
- snat_session_t * s0;
- clib_bihash_kv_8_8_t kv0, value0;
- ip_csum_t sum0;
- u32 new_dst_addr0 = 0, old_dst_addr0, ti = 0, si;
- u16 new_dst_port0, old_dst_port0;
- int rv;
-
- key0.addr = ip0->dst_address;
- key0.port = udp0->dst_port;
- key0.protocol = proto0;
- key0.fib_index = sm->outside_fib_index;
- kv0.key = key0.as_u64;
-
- /* Check if destination is static mappings */
- if (!snat_static_mapping_match(sm, key0, &sm0, 1, 0, 0, 0, 0))
- {
- new_dst_addr0 = sm0.addr.as_u32;
- new_dst_port0 = sm0.port;
- vnet_buffer(b0)->sw_if_index[VLIB_TX] = sm0.fib_index;
- }
- /* or active session */
- else
- {
- if (sm->num_workers > 1)
- ti = (clib_net_to_host_u16 (udp0->dst_port) - 1024) / sm->port_per_thread;
- else
- ti = sm->num_workers;
-
- if (is_ed)
- {
- clib_bihash_kv_16_8_t ed_kv, ed_value;
- make_ed_kv (&ed_kv, &ip0->dst_address, &ip0->src_address,
- ip0->protocol, sm->outside_fib_index, udp0->dst_port,
- udp0->src_port);
- rv = clib_bihash_search_16_8 (&sm->per_thread_data[ti].out2in_ed,
- &ed_kv, &ed_value);
- si = ed_value.value;
- }
- else
- {
- rv = clib_bihash_search_8_8 (&sm->per_thread_data[ti].out2in, &kv0,
- &value0);
- si = value0.value;
- }
- if (rv)
- return 0;
-
- s0 = pool_elt_at_index (sm->per_thread_data[ti].sessions, si);
- new_dst_addr0 = s0->in2out.addr.as_u32;
- new_dst_port0 = s0->in2out.port;
- vnet_buffer(b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index;
- }
-
- /* Destination is behind the same NAT, use internal address and port */
- if (new_dst_addr0)
- {
- old_dst_addr0 = ip0->dst_address.as_u32;
- ip0->dst_address.as_u32 = new_dst_addr0;
- sum0 = ip0->checksum;
- sum0 = ip_csum_update (sum0, old_dst_addr0, new_dst_addr0,
- ip4_header_t, dst_address);
- ip0->checksum = ip_csum_fold (sum0);
-
- old_dst_port0 = tcp0->dst;
- if (PREDICT_TRUE(new_dst_port0 != old_dst_port0))
- {
- if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP))
- {
- tcp0->dst = new_dst_port0;
- sum0 = tcp0->checksum;
- sum0 = ip_csum_update (sum0, old_dst_addr0, new_dst_addr0,
- ip4_header_t, dst_address);
- sum0 = ip_csum_update (sum0, old_dst_port0, new_dst_port0,
- ip4_header_t /* cheat */, length);
- tcp0->checksum = ip_csum_fold(sum0);
- }
- else
- {
- udp0->dst_port = new_dst_port0;
- udp0->checksum = 0;
- }
- }
- else
- {
- if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP))
- {
- sum0 = tcp0->checksum;
- sum0 = ip_csum_update (sum0, old_dst_addr0, new_dst_addr0,
- ip4_header_t, dst_address);
- tcp0->checksum = ip_csum_fold(sum0);
- }
- }
- return 1;
- }
- return 0;
-}
-
static inline u32
-snat_icmp_hairpinning (snat_main_t *sm,
- vlib_buffer_t * b0,
- ip4_header_t * ip0,
- icmp46_header_t * icmp0,
- int is_ed)
-{
- snat_session_key_t key0;
- clib_bihash_kv_8_8_t kv0, value0;
- u32 old_dst_addr0, new_dst_addr0;
- u32 old_addr0, new_addr0;
- u16 old_port0, new_port0;
- u16 old_checksum0, new_checksum0;
- u32 si, ti = 0;
- ip_csum_t sum0;
- snat_session_t *s0;
- snat_static_mapping_t *m0;
-
- if (icmp_is_error_message (icmp0))
- {
- ip4_header_t *inner_ip0 = 0;
- tcp_udp_header_t *l4_header = 0;
-
- inner_ip0 = (ip4_header_t *)((icmp_echo_header_t *)(icmp0+1)+1);
- l4_header = ip4_next_header (inner_ip0);
- u32 protocol = ip_proto_to_snat_proto (inner_ip0->protocol);
-
- if (protocol != SNAT_PROTOCOL_TCP && protocol != SNAT_PROTOCOL_UDP)
- return 1;
-
- if (is_ed)
- {
- clib_bihash_kv_16_8_t ed_kv, ed_value;
- make_ed_kv (&ed_kv, &ip0->dst_address, &ip0->src_address,
- inner_ip0->protocol, sm->outside_fib_index,
- l4_header->src_port, l4_header->dst_port);
- if (clib_bihash_search_16_8 (&sm->per_thread_data[ti].out2in_ed,
- &ed_kv, &ed_value))
- return 1;
- si = ed_value.value;
- }
- else
- {
- key0.addr = ip0->dst_address;
- key0.port = l4_header->src_port;
- key0.protocol = protocol;
- key0.fib_index = sm->outside_fib_index;
- kv0.key = key0.as_u64;
- if (clib_bihash_search_8_8 (&sm->per_thread_data[ti].out2in, &kv0,
- &value0))
- return 1;
- si = value0.value;
- }
- s0 = pool_elt_at_index (sm->per_thread_data[ti].sessions, si);
- new_dst_addr0 = s0->in2out.addr.as_u32;
- vnet_buffer(b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index;
-
- /* update inner source IP address */
- old_addr0 = inner_ip0->src_address.as_u32;
- inner_ip0->src_address.as_u32 = new_dst_addr0;
- new_addr0 = inner_ip0->src_address.as_u32;
- sum0 = icmp0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
- src_address);
- icmp0->checksum = ip_csum_fold (sum0);
-
- /* update inner IP header checksum */
- old_checksum0 = inner_ip0->checksum;
- sum0 = inner_ip0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
- src_address);
- inner_ip0->checksum = ip_csum_fold (sum0);
- new_checksum0 = inner_ip0->checksum;
- sum0 = icmp0->checksum;
- sum0 = ip_csum_update (sum0, old_checksum0, new_checksum0, ip4_header_t,
- checksum);
- icmp0->checksum = ip_csum_fold (sum0);
-
- /* update inner source port */
- old_port0 = l4_header->src_port;
- l4_header->src_port = s0->in2out.port;
- new_port0 = l4_header->src_port;
- sum0 = icmp0->checksum;
- sum0 = ip_csum_update (sum0, old_port0, new_port0, tcp_udp_header_t,
- src_port);
- icmp0->checksum = ip_csum_fold (sum0);
- }
- else
- {
- if (!is_ed)
- {
- icmp_echo_header_t *echo0 = (icmp_echo_header_t *)(icmp0+1);
- u16 icmp_id0 = echo0->identifier;
- key0.addr = ip0->dst_address;
- key0.port = icmp_id0;
- key0.protocol = SNAT_PROTOCOL_ICMP;
- key0.fib_index = sm->outside_fib_index;
- kv0.key = key0.as_u64;
- if (sm->num_workers > 1)
- ti = (clib_net_to_host_u16 (icmp_id0) - 1024) / sm->port_per_thread;
- else
- ti = sm->num_workers;
- int rv = clib_bihash_search_8_8 (&sm->per_thread_data[ti].out2in, &kv0,
- &value0);
- if (!rv)
- {
- si = value0.value;
- s0 = pool_elt_at_index (sm->per_thread_data[ti].sessions, si);
- new_dst_addr0 = s0->in2out.addr.as_u32;
- vnet_buffer(b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index;
- echo0->identifier = s0->in2out.port;
- sum0 = icmp0->checksum;
- sum0 = ip_csum_update (sum0, icmp_id0, s0->in2out.port,
- icmp_echo_header_t, identifier);
- icmp0->checksum = ip_csum_fold (sum0);
- goto change_addr;
- }
- ti = 0;
- }
-
- key0.addr = ip0->dst_address;
- key0.port = 0;
- key0.protocol = 0;
- key0.fib_index = sm->outside_fib_index;
- kv0.key = key0.as_u64;
-
- if (clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv0, &value0))
- return 1;
-
- m0 = pool_elt_at_index (sm->static_mappings, value0.value);
-
- new_dst_addr0 = m0->local_addr.as_u32;
- if (vnet_buffer(b0)->sw_if_index[VLIB_TX] == ~0)
- vnet_buffer(b0)->sw_if_index[VLIB_TX] = m0->fib_index;
- }
-change_addr:
- /* Destination is behind the same NAT, use internal address and port */
- if (new_dst_addr0)
- {
- old_dst_addr0 = ip0->dst_address.as_u32;
- ip0->dst_address.as_u32 = new_dst_addr0;
- sum0 = ip0->checksum;
- sum0 = ip_csum_update (sum0, old_dst_addr0, new_dst_addr0,
- ip4_header_t, dst_address);
- ip0->checksum = ip_csum_fold (sum0);
- }
- return 0;
-}
-
-static inline u32 icmp_in2out_slow_path (snat_main_t *sm,
- vlib_buffer_t * b0,
- ip4_header_t * ip0,
- icmp46_header_t * icmp0,
- u32 sw_if_index0,
- u32 rx_fib_index0,
- vlib_node_runtime_t * node,
- u32 next0,
- f64 now,
- u32 thread_index,
- snat_session_t ** p_s0)
+icmp_in2out_slow_path (snat_main_t * sm,
+ vlib_buffer_t * b0,
+ ip4_header_t * ip0,
+ icmp46_header_t * icmp0,
+ u32 sw_if_index0,
+ u32 rx_fib_index0,
+ vlib_node_runtime_t * node,
+ u32 next0,
+ f64 now, u32 thread_index, snat_session_t ** p_s0)
{
- next0 = icmp_in2out(sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
- next0, thread_index, p_s0, 0);
- snat_session_t * s0 = *p_s0;
- if (PREDICT_TRUE(next0 != SNAT_IN2OUT_NEXT_DROP && s0))
+ next0 = icmp_in2out (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
+ next0, thread_index, p_s0, 0);
+ snat_session_t *s0 = *p_s0;
+ if (PREDICT_TRUE (next0 != SNAT_IN2OUT_NEXT_DROP && s0))
{
/* Accounting */
nat44_session_update_counters (s0, now,
- vlib_buffer_length_in_chain (sm->vlib_main, b0));
+ vlib_buffer_length_in_chain
+ (sm->vlib_main, b0));
/* Per-user LRU list maintenance */
nat44_session_update_lru (sm, s0, thread_index);
}
return next0;
}
-static inline void
-nat_hairpinning_sm_unknown_proto (snat_main_t * sm,
- vlib_buffer_t * b,
- ip4_header_t * ip)
-{
- clib_bihash_kv_8_8_t kv, value;
- snat_static_mapping_t *m;
- u32 old_addr, new_addr;
- ip_csum_t sum;
-
- make_sm_kv (&kv, &ip->dst_address, 0, 0, 0);
- if (clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value))
- return;
-
- m = pool_elt_at_index (sm->static_mappings, value.value);
-
- old_addr = ip->dst_address.as_u32;
- new_addr = ip->dst_address.as_u32 = m->local_addr.as_u32;
- sum = ip->checksum;
- sum = ip_csum_update (sum, old_addr, new_addr, ip4_header_t, dst_address);
- ip->checksum = ip_csum_fold (sum);
-
- if (vnet_buffer(b)->sw_if_index[VLIB_TX] == ~0)
- vnet_buffer(b)->sw_if_index[VLIB_TX] = m->fib_index;
-}
-
static int
-nat_in2out_sm_unknown_proto (snat_main_t *sm,
- vlib_buffer_t * b,
- ip4_header_t * ip,
- u32 rx_fib_index)
+nat_in2out_sm_unknown_proto (snat_main_t * sm,
+ vlib_buffer_t * b,
+ ip4_header_t * ip, u32 rx_fib_index)
{
clib_bihash_kv_8_8_t kv, value;
snat_static_mapping_t *m;
/* Hairpinning */
- if (vnet_buffer(b)->sw_if_index[VLIB_TX] == ~0)
+ if (vnet_buffer (b)->sw_if_index[VLIB_TX] == ~0)
{
- vnet_buffer(b)->sw_if_index[VLIB_TX] = m->fib_index;
+ vnet_buffer (b)->sw_if_index[VLIB_TX] = m->fib_index;
nat_hairpinning_sm_unknown_proto (sm, b, ip);
}
static inline uword
snat_in2out_node_fn_inline (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame, int is_slow_path,
- int is_output_feature)
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame, int is_slow_path,
+ int is_output_feature)
{
- u32 n_left_from, * from, * to_next;
+ u32 n_left_from, *from, *to_next;
snat_in2out_next_t next_index;
u32 pkts_processed = 0;
- snat_main_t * sm = &snat_main;
+ snat_main_t *sm = &snat_main;
f64 now = vlib_time_now (vm);
u32 stats_node_index;
u32 thread_index = vm->thread_index;
{
u32 n_left_to_next;
- vlib_get_next_frame (vm, node, next_index,
- to_next, n_left_to_next);
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
while (n_left_from >= 4 && n_left_to_next >= 2)
{
- u32 bi0, bi1;
- vlib_buffer_t * b0, * b1;
- u32 next0, next1;
- u32 sw_if_index0, sw_if_index1;
- ip4_header_t * ip0, * ip1;
- ip_csum_t sum0, sum1;
- u32 new_addr0, old_addr0, new_addr1, old_addr1;
- u16 old_port0, new_port0, old_port1, new_port1;
- udp_header_t * udp0, * udp1;
- tcp_header_t * tcp0, * tcp1;
- icmp46_header_t * icmp0, * icmp1;
- snat_session_key_t key0, key1;
- u32 rx_fib_index0, rx_fib_index1;
- u32 proto0, proto1;
- snat_session_t * s0 = 0, * s1 = 0;
- clib_bihash_kv_8_8_t kv0, value0, kv1, value1;
- u32 iph_offset0 = 0, iph_offset1 = 0;
+ u32 bi0, bi1;
+ vlib_buffer_t *b0, *b1;
+ u32 next0, next1;
+ u32 sw_if_index0, sw_if_index1;
+ ip4_header_t *ip0, *ip1;
+ ip_csum_t sum0, sum1;
+ u32 new_addr0, old_addr0, new_addr1, old_addr1;
+ u16 old_port0, new_port0, old_port1, new_port1;
+ udp_header_t *udp0, *udp1;
+ tcp_header_t *tcp0, *tcp1;
+ icmp46_header_t *icmp0, *icmp1;
+ snat_session_key_t key0, key1;
+ u32 rx_fib_index0, rx_fib_index1;
+ u32 proto0, proto1;
+ snat_session_t *s0 = 0, *s1 = 0;
+ clib_bihash_kv_8_8_t kv0, value0, kv1, value1;
+ u32 iph_offset0 = 0, iph_offset1 = 0;
/* Prefetch next iteration. */
{
- vlib_buffer_t * p2, * p3;
+ vlib_buffer_t *p2, *p3;
p2 = vlib_get_buffer (vm, from[2]);
p3 = vlib_get_buffer (vm, from[3]);
CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, STORE);
}
- /* speculatively enqueue b0 and b1 to the current next frame */
+ /* speculatively enqueue b0 and b1 to the current next frame */
to_next[0] = bi0 = from[0];
to_next[1] = bi1 = from[1];
from += 2;
b0 = vlib_get_buffer (vm, bi0);
b1 = vlib_get_buffer (vm, bi1);
- if (is_output_feature)
- iph_offset0 = vnet_buffer (b0)->ip.save_rewrite_length;
+ if (is_output_feature)
+ iph_offset0 = vnet_buffer (b0)->ip.save_rewrite_length;
- ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) +
- iph_offset0);
+ ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) +
+ iph_offset0);
- udp0 = ip4_next_header (ip0);
- tcp0 = (tcp_header_t *) udp0;
- icmp0 = (icmp46_header_t *) udp0;
+ udp0 = ip4_next_header (ip0);
+ tcp0 = (tcp_header_t *) udp0;
+ icmp0 = (icmp46_header_t *) udp0;
- sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
rx_fib_index0 = vec_elt (sm->ip4_main->fib_index_by_sw_if_index,
- sw_if_index0);
+ sw_if_index0);
- next0 = next1 = SNAT_IN2OUT_NEXT_LOOKUP;
-
- if (PREDICT_FALSE(ip0->ttl == 1))
- {
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
- icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
- ICMP4_time_exceeded_ttl_exceeded_in_transit,
- 0);
- next0 = SNAT_IN2OUT_NEXT_ICMP_ERROR;
- goto trace00;
- }
+ next0 = next1 = SNAT_IN2OUT_NEXT_LOOKUP;
- proto0 = ip_proto_to_snat_proto (ip0->protocol);
+ if (PREDICT_FALSE (ip0->ttl == 1))
+ {
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
+ icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
+ ICMP4_time_exceeded_ttl_exceeded_in_transit,
+ 0);
+ next0 = SNAT_IN2OUT_NEXT_ICMP_ERROR;
+ goto trace00;
+ }
- /* Next configured feature, probably ip4-lookup */
- if (is_slow_path)
- {
- if (PREDICT_FALSE (proto0 == ~0))
- {
- if (nat_in2out_sm_unknown_proto (sm, b0, ip0, rx_fib_index0))
- {
- next0 = SNAT_IN2OUT_NEXT_DROP;
- b0->error = node->errors[SNAT_IN2OUT_ERROR_UNSUPPORTED_PROTOCOL];
- }
- goto trace00;
- }
+ proto0 = ip_proto_to_snat_proto (ip0->protocol);
- if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
- {
- next0 = icmp_in2out_slow_path
- (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0,
- node, next0, now, thread_index, &s0);
- goto trace00;
- }
- }
- else
- {
- if (PREDICT_FALSE (proto0 == ~0 || proto0 == SNAT_PROTOCOL_ICMP))
- {
- next0 = SNAT_IN2OUT_NEXT_SLOW_PATH;
- goto trace00;
- }
+ /* Next configured feature, probably ip4-lookup */
+ if (is_slow_path)
+ {
+ if (PREDICT_FALSE (proto0 == ~0))
+ {
+ if (nat_in2out_sm_unknown_proto
+ (sm, b0, ip0, rx_fib_index0))
+ {
+ next0 = SNAT_IN2OUT_NEXT_DROP;
+ b0->error =
+ node->errors[SNAT_IN2OUT_ERROR_UNSUPPORTED_PROTOCOL];
+ }
+ goto trace00;
+ }
- if (ip4_is_fragment (ip0))
- {
- next0 = SNAT_IN2OUT_NEXT_REASS;
- goto trace00;
- }
- }
+ if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
+ {
+ next0 = icmp_in2out_slow_path
+ (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0,
+ node, next0, now, thread_index, &s0);
+ goto trace00;
+ }
+ }
+ else
+ {
+ if (PREDICT_FALSE
+ (proto0 == ~0 || proto0 == SNAT_PROTOCOL_ICMP))
+ {
+ next0 = SNAT_IN2OUT_NEXT_SLOW_PATH;
+ goto trace00;
+ }
- key0.addr = ip0->src_address;
- key0.port = udp0->src_port;
- key0.protocol = proto0;
- key0.fib_index = rx_fib_index0;
+ if (ip4_is_fragment (ip0))
+ {
+ next0 = SNAT_IN2OUT_NEXT_REASS;
+ goto trace00;
+ }
+ }
- kv0.key = key0.as_u64;
+ key0.addr = ip0->src_address;
+ key0.port = udp0->src_port;
+ key0.protocol = proto0;
+ key0.fib_index = rx_fib_index0;
- if (PREDICT_FALSE (clib_bihash_search_8_8 (
- &sm->per_thread_data[thread_index].in2out, &kv0, &value0) != 0))
- {
- if (is_slow_path)
- {
- if (is_output_feature)
- {
- if (PREDICT_FALSE(nat_not_translate_output_feature(sm,
- ip0, proto0, udp0->src_port, udp0->dst_port, thread_index, sw_if_index0)))
- goto trace00;
- }
- else
- {
- if (PREDICT_FALSE(snat_not_translate(sm, node, sw_if_index0,
- ip0, proto0, rx_fib_index0, thread_index)))
- goto trace00;
- }
-
- next0 = slow_path (sm, b0, ip0, rx_fib_index0, &key0,
- &s0, node, next0, thread_index, now);
- if (PREDICT_FALSE (next0 == SNAT_IN2OUT_NEXT_DROP))
- goto trace00;
- }
- else
- {
- next0 = SNAT_IN2OUT_NEXT_SLOW_PATH;
- goto trace00;
- }
- }
- else
- s0 = pool_elt_at_index (sm->per_thread_data[thread_index].sessions,
- value0.value);
+ kv0.key = key0.as_u64;
+
+ if (PREDICT_FALSE
+ (clib_bihash_search_8_8
+ (&sm->per_thread_data[thread_index].in2out, &kv0,
+ &value0) != 0))
+ {
+ if (is_slow_path)
+ {
+ if (is_output_feature)
+ {
+ if (PREDICT_FALSE (nat_not_translate_output_feature (sm,
+ ip0,
+ proto0,
+ udp0->src_port,
+ udp0->dst_port,
+ thread_index,
+ sw_if_index0)))
+ goto trace00;
+ }
+ else
+ {
+ if (PREDICT_FALSE
+ (snat_not_translate
+ (sm, node, sw_if_index0, ip0, proto0,
+ rx_fib_index0, thread_index)))
+ goto trace00;
+ }
+
+ next0 = slow_path (sm, b0, ip0, rx_fib_index0, &key0,
+ &s0, node, next0, thread_index, now);
+ if (PREDICT_FALSE (next0 == SNAT_IN2OUT_NEXT_DROP))
+ goto trace00;
+ }
+ else
+ {
+ next0 = SNAT_IN2OUT_NEXT_SLOW_PATH;
+ goto trace00;
+ }
+ }
+ else
+ s0 =
+ pool_elt_at_index (sm->per_thread_data[thread_index].sessions,
+ value0.value);
- b0->flags |= VNET_BUFFER_F_IS_NATED;
+ b0->flags |= VNET_BUFFER_F_IS_NATED;
- old_addr0 = ip0->src_address.as_u32;
- ip0->src_address = s0->out2in.addr;
- new_addr0 = ip0->src_address.as_u32;
- if (!is_output_feature)
- vnet_buffer(b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index;
+ old_addr0 = ip0->src_address.as_u32;
+ ip0->src_address = s0->out2in.addr;
+ new_addr0 = ip0->src_address.as_u32;
+ if (!is_output_feature)
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index;
- sum0 = ip0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
- ip4_header_t,
- src_address /* changed member */);
- ip0->checksum = ip_csum_fold (sum0);
+ sum0 = ip0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
+ ip4_header_t,
+ src_address /* changed member */ );
+ ip0->checksum = ip_csum_fold (sum0);
- if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP))
- {
- old_port0 = tcp0->src_port;
- tcp0->src_port = s0->out2in.port;
- new_port0 = tcp0->src_port;
-
- sum0 = tcp0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
- ip4_header_t,
- dst_address /* changed member */);
- sum0 = ip_csum_update (sum0, old_port0, new_port0,
- ip4_header_t /* cheat */,
- length /* changed member */);
- mss_clamping (sm, tcp0, &sum0);
- tcp0->checksum = ip_csum_fold(sum0);
- }
- else
- {
- old_port0 = udp0->src_port;
- udp0->src_port = s0->out2in.port;
- udp0->checksum = 0;
- }
+ if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
+ {
+ old_port0 = tcp0->src_port;
+ tcp0->src_port = s0->out2in.port;
+ new_port0 = tcp0->src_port;
+
+ sum0 = tcp0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
+ ip4_header_t,
+ dst_address /* changed member */ );
+ sum0 = ip_csum_update (sum0, old_port0, new_port0,
+ ip4_header_t /* cheat */ ,
+ length /* changed member */ );
+ mss_clamping (sm, tcp0, &sum0);
+ tcp0->checksum = ip_csum_fold (sum0);
+ }
+ else
+ {
+ old_port0 = udp0->src_port;
+ udp0->src_port = s0->out2in.port;
+ udp0->checksum = 0;
+ }
- /* Accounting */
- nat44_session_update_counters (s0, now,
- vlib_buffer_length_in_chain (vm, b0));
- /* Per-user LRU list maintenance */
- nat44_session_update_lru (sm, s0, thread_index);
- trace00:
+ /* Accounting */
+ nat44_session_update_counters (s0, now,
+ vlib_buffer_length_in_chain (vm,
+ b0));
+ /* Per-user LRU list maintenance */
+ nat44_session_update_lru (sm, s0, thread_index);
+ trace00:
- if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b0->flags & VLIB_BUFFER_IS_TRACED)))
- {
- snat_in2out_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->is_slow_path = is_slow_path;
- t->sw_if_index = sw_if_index0;
- t->next_index = next0;
- t->session_index = ~0;
- if (s0)
- t->session_index = s0 - sm->per_thread_data[thread_index].sessions;
- }
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ snat_in2out_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->is_slow_path = is_slow_path;
+ t->sw_if_index = sw_if_index0;
+ t->next_index = next0;
+ t->session_index = ~0;
+ if (s0)
+ t->session_index =
+ s0 - sm->per_thread_data[thread_index].sessions;
+ }
- pkts_processed += next0 != SNAT_IN2OUT_NEXT_DROP;
+ pkts_processed += next0 != SNAT_IN2OUT_NEXT_DROP;
- if (is_output_feature)
- iph_offset1 = vnet_buffer (b1)->ip.save_rewrite_length;
+ if (is_output_feature)
+ iph_offset1 = vnet_buffer (b1)->ip.save_rewrite_length;
- ip1 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b1) +
- iph_offset1);
+ ip1 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b1) +
+ iph_offset1);
- udp1 = ip4_next_header (ip1);
- tcp1 = (tcp_header_t *) udp1;
- icmp1 = (icmp46_header_t *) udp1;
+ udp1 = ip4_next_header (ip1);
+ tcp1 = (tcp_header_t *) udp1;
+ icmp1 = (icmp46_header_t *) udp1;
- sw_if_index1 = vnet_buffer(b1)->sw_if_index[VLIB_RX];
+ sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX];
rx_fib_index1 = vec_elt (sm->ip4_main->fib_index_by_sw_if_index,
- sw_if_index1);
+ sw_if_index1);
- if (PREDICT_FALSE(ip1->ttl == 1))
- {
- vnet_buffer (b1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
- icmp4_error_set_vnet_buffer (b1, ICMP4_time_exceeded,
- ICMP4_time_exceeded_ttl_exceeded_in_transit,
- 0);
- next1 = SNAT_IN2OUT_NEXT_ICMP_ERROR;
- goto trace01;
- }
+ if (PREDICT_FALSE (ip1->ttl == 1))
+ {
+ vnet_buffer (b1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
+ icmp4_error_set_vnet_buffer (b1, ICMP4_time_exceeded,
+ ICMP4_time_exceeded_ttl_exceeded_in_transit,
+ 0);
+ next1 = SNAT_IN2OUT_NEXT_ICMP_ERROR;
+ goto trace01;
+ }
- proto1 = ip_proto_to_snat_proto (ip1->protocol);
+ proto1 = ip_proto_to_snat_proto (ip1->protocol);
- /* Next configured feature, probably ip4-lookup */
- if (is_slow_path)
- {
- if (PREDICT_FALSE (proto1 == ~0))
- {
- if (nat_in2out_sm_unknown_proto (sm, b1, ip1, rx_fib_index1))
- {
- next1 = SNAT_IN2OUT_NEXT_DROP;
- b1->error = node->errors[SNAT_IN2OUT_ERROR_UNSUPPORTED_PROTOCOL];
- }
- goto trace01;
- }
+ /* Next configured feature, probably ip4-lookup */
+ if (is_slow_path)
+ {
+ if (PREDICT_FALSE (proto1 == ~0))
+ {
+ if (nat_in2out_sm_unknown_proto
+ (sm, b1, ip1, rx_fib_index1))
+ {
+ next1 = SNAT_IN2OUT_NEXT_DROP;
+ b1->error =
+ node->errors[SNAT_IN2OUT_ERROR_UNSUPPORTED_PROTOCOL];
+ }
+ goto trace01;
+ }
- if (PREDICT_FALSE (proto1 == SNAT_PROTOCOL_ICMP))
- {
- next1 = icmp_in2out_slow_path
- (sm, b1, ip1, icmp1, sw_if_index1, rx_fib_index1, node,
- next1, now, thread_index, &s1);
- goto trace01;
- }
- }
- else
- {
- if (PREDICT_FALSE (proto1 == ~0 || proto1 == SNAT_PROTOCOL_ICMP))
- {
- next1 = SNAT_IN2OUT_NEXT_SLOW_PATH;
- goto trace01;
- }
+ if (PREDICT_FALSE (proto1 == SNAT_PROTOCOL_ICMP))
+ {
+ next1 = icmp_in2out_slow_path
+ (sm, b1, ip1, icmp1, sw_if_index1, rx_fib_index1, node,
+ next1, now, thread_index, &s1);
+ goto trace01;
+ }
+ }
+ else
+ {
+ if (PREDICT_FALSE
+ (proto1 == ~0 || proto1 == SNAT_PROTOCOL_ICMP))
+ {
+ next1 = SNAT_IN2OUT_NEXT_SLOW_PATH;
+ goto trace01;
+ }
- if (ip4_is_fragment (ip1))
- {
- next1 = SNAT_IN2OUT_NEXT_REASS;
- goto trace01;
- }
- }
+ if (ip4_is_fragment (ip1))
+ {
+ next1 = SNAT_IN2OUT_NEXT_REASS;
+ goto trace01;
+ }
+ }
- key1.addr = ip1->src_address;
- key1.port = udp1->src_port;
- key1.protocol = proto1;
- key1.fib_index = rx_fib_index1;
+ key1.addr = ip1->src_address;
+ key1.port = udp1->src_port;
+ key1.protocol = proto1;
+ key1.fib_index = rx_fib_index1;
- kv1.key = key1.as_u64;
+ kv1.key = key1.as_u64;
- if (PREDICT_FALSE(clib_bihash_search_8_8 (
- &sm->per_thread_data[thread_index].in2out, &kv1, &value1) != 0))
- {
- if (is_slow_path)
- {
- if (is_output_feature)
- {
- if (PREDICT_FALSE(nat_not_translate_output_feature(sm,
- ip1, proto1, udp1->src_port, udp1->dst_port, thread_index, sw_if_index1)))
- goto trace01;
- }
- else
- {
- if (PREDICT_FALSE(snat_not_translate(sm, node, sw_if_index1,
- ip1, proto1, rx_fib_index1, thread_index)))
- goto trace01;
- }
-
- next1 = slow_path (sm, b1, ip1, rx_fib_index1, &key1,
- &s1, node, next1, thread_index, now);
- if (PREDICT_FALSE (next1 == SNAT_IN2OUT_NEXT_DROP))
- goto trace01;
- }
- else
- {
- next1 = SNAT_IN2OUT_NEXT_SLOW_PATH;
- goto trace01;
- }
- }
- else
- s1 = pool_elt_at_index (sm->per_thread_data[thread_index].sessions,
- value1.value);
+ if (PREDICT_FALSE
+ (clib_bihash_search_8_8
+ (&sm->per_thread_data[thread_index].in2out, &kv1,
+ &value1) != 0))
+ {
+ if (is_slow_path)
+ {
+ if (is_output_feature)
+ {
+ if (PREDICT_FALSE (nat_not_translate_output_feature (sm,
+ ip1,
+ proto1,
+ udp1->src_port,
+ udp1->dst_port,
+ thread_index,
+ sw_if_index1)))
+ goto trace01;
+ }
+ else
+ {
+ if (PREDICT_FALSE
+ (snat_not_translate
+ (sm, node, sw_if_index1, ip1, proto1,
+ rx_fib_index1, thread_index)))
+ goto trace01;
+ }
+
+ next1 = slow_path (sm, b1, ip1, rx_fib_index1, &key1,
+ &s1, node, next1, thread_index, now);
+ if (PREDICT_FALSE (next1 == SNAT_IN2OUT_NEXT_DROP))
+ goto trace01;
+ }
+ else
+ {
+ next1 = SNAT_IN2OUT_NEXT_SLOW_PATH;
+ goto trace01;
+ }
+ }
+ else
+ s1 =
+ pool_elt_at_index (sm->per_thread_data[thread_index].sessions,
+ value1.value);
- b1->flags |= VNET_BUFFER_F_IS_NATED;
+ b1->flags |= VNET_BUFFER_F_IS_NATED;
- old_addr1 = ip1->src_address.as_u32;
- ip1->src_address = s1->out2in.addr;
- new_addr1 = ip1->src_address.as_u32;
- if (!is_output_feature)
- vnet_buffer(b1)->sw_if_index[VLIB_TX] = s1->out2in.fib_index;
+ old_addr1 = ip1->src_address.as_u32;
+ ip1->src_address = s1->out2in.addr;
+ new_addr1 = ip1->src_address.as_u32;
+ if (!is_output_feature)
+ vnet_buffer (b1)->sw_if_index[VLIB_TX] = s1->out2in.fib_index;
- sum1 = ip1->checksum;
- sum1 = ip_csum_update (sum1, old_addr1, new_addr1,
- ip4_header_t,
- src_address /* changed member */);
- ip1->checksum = ip_csum_fold (sum1);
+ sum1 = ip1->checksum;
+ sum1 = ip_csum_update (sum1, old_addr1, new_addr1,
+ ip4_header_t,
+ src_address /* changed member */ );
+ ip1->checksum = ip_csum_fold (sum1);
- if (PREDICT_TRUE(proto1 == SNAT_PROTOCOL_TCP))
- {
- old_port1 = tcp1->src_port;
- tcp1->src_port = s1->out2in.port;
- new_port1 = tcp1->src_port;
-
- sum1 = tcp1->checksum;
- sum1 = ip_csum_update (sum1, old_addr1, new_addr1,
- ip4_header_t,
- dst_address /* changed member */);
- sum1 = ip_csum_update (sum1, old_port1, new_port1,
- ip4_header_t /* cheat */,
- length /* changed member */);
- mss_clamping (sm, tcp1, &sum1);
- tcp1->checksum = ip_csum_fold(sum1);
- }
- else
- {
- old_port1 = udp1->src_port;
- udp1->src_port = s1->out2in.port;
- udp1->checksum = 0;
- }
+ if (PREDICT_TRUE (proto1 == SNAT_PROTOCOL_TCP))
+ {
+ old_port1 = tcp1->src_port;
+ tcp1->src_port = s1->out2in.port;
+ new_port1 = tcp1->src_port;
+
+ sum1 = tcp1->checksum;
+ sum1 = ip_csum_update (sum1, old_addr1, new_addr1,
+ ip4_header_t,
+ dst_address /* changed member */ );
+ sum1 = ip_csum_update (sum1, old_port1, new_port1,
+ ip4_header_t /* cheat */ ,
+ length /* changed member */ );
+ mss_clamping (sm, tcp1, &sum1);
+ tcp1->checksum = ip_csum_fold (sum1);
+ }
+ else
+ {
+ old_port1 = udp1->src_port;
+ udp1->src_port = s1->out2in.port;
+ udp1->checksum = 0;
+ }
- /* Accounting */
- nat44_session_update_counters (s1, now,
- vlib_buffer_length_in_chain (vm, b1));
- /* Per-user LRU list maintenance */
- nat44_session_update_lru (sm, s1, thread_index);
- trace01:
+ /* Accounting */
+ nat44_session_update_counters (s1, now,
+ vlib_buffer_length_in_chain (vm,
+ b1));
+ /* Per-user LRU list maintenance */
+ nat44_session_update_lru (sm, s1, thread_index);
+ trace01:
- if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b1->flags & VLIB_BUFFER_IS_TRACED)))
- {
- snat_in2out_trace_t *t =
- vlib_add_trace (vm, node, b1, sizeof (*t));
- t->sw_if_index = sw_if_index1;
- t->next_index = next1;
- t->session_index = ~0;
- if (s1)
- t->session_index = s1 - sm->per_thread_data[thread_index].sessions;
- }
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b1->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ snat_in2out_trace_t *t =
+ vlib_add_trace (vm, node, b1, sizeof (*t));
+ t->sw_if_index = sw_if_index1;
+ t->next_index = next1;
+ t->session_index = ~0;
+ if (s1)
+ t->session_index =
+ s1 - sm->per_thread_data[thread_index].sessions;
+ }
- pkts_processed += next1 != SNAT_IN2OUT_NEXT_DROP;
+ pkts_processed += next1 != SNAT_IN2OUT_NEXT_DROP;
- /* verify speculative enqueues, maybe switch current next frame */
- vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
- to_next, n_left_to_next,
- bi0, bi1, next0, next1);
- }
+ /* verify speculative enqueues, maybe switch current next frame */
+ vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
+ to_next, n_left_to_next,
+ bi0, bi1, next0, next1);
+ }
while (n_left_from > 0 && n_left_to_next > 0)
{
- u32 bi0;
- vlib_buffer_t * b0;
- u32 next0;
- u32 sw_if_index0;
- ip4_header_t * ip0;
- ip_csum_t sum0;
- u32 new_addr0, old_addr0;
- u16 old_port0, new_port0;
- udp_header_t * udp0;
- tcp_header_t * tcp0;
- icmp46_header_t * icmp0;
- snat_session_key_t key0;
- u32 rx_fib_index0;
- u32 proto0;
- snat_session_t * s0 = 0;
- clib_bihash_kv_8_8_t kv0, value0;
- u32 iph_offset0 = 0;
-
- /* speculatively enqueue b0 to the current next frame */
+ u32 bi0;
+ vlib_buffer_t *b0;
+ u32 next0;
+ u32 sw_if_index0;
+ ip4_header_t *ip0;
+ ip_csum_t sum0;
+ u32 new_addr0, old_addr0;
+ u16 old_port0, new_port0;
+ udp_header_t *udp0;
+ tcp_header_t *tcp0;
+ icmp46_header_t *icmp0;
+ snat_session_key_t key0;
+ u32 rx_fib_index0;
+ u32 proto0;
+ snat_session_t *s0 = 0;
+ clib_bihash_kv_8_8_t kv0, value0;
+ u32 iph_offset0 = 0;
+
+ /* speculatively enqueue b0 to the current next frame */
bi0 = from[0];
to_next[0] = bi0;
from += 1;
n_left_to_next -= 1;
b0 = vlib_get_buffer (vm, bi0);
- next0 = SNAT_IN2OUT_NEXT_LOOKUP;
+ next0 = SNAT_IN2OUT_NEXT_LOOKUP;
- if (is_output_feature)
- iph_offset0 = vnet_buffer (b0)->ip.save_rewrite_length;
+ if (is_output_feature)
+ iph_offset0 = vnet_buffer (b0)->ip.save_rewrite_length;
- ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) +
- iph_offset0);
+ ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) +
+ iph_offset0);
- udp0 = ip4_next_header (ip0);
- tcp0 = (tcp_header_t *) udp0;
- icmp0 = (icmp46_header_t *) udp0;
+ udp0 = ip4_next_header (ip0);
+ tcp0 = (tcp_header_t *) udp0;
+ icmp0 = (icmp46_header_t *) udp0;
- sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
rx_fib_index0 = vec_elt (sm->ip4_main->fib_index_by_sw_if_index,
- sw_if_index0);
+ sw_if_index0);
- if (PREDICT_FALSE(ip0->ttl == 1))
- {
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
- icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
- ICMP4_time_exceeded_ttl_exceeded_in_transit,
- 0);
- next0 = SNAT_IN2OUT_NEXT_ICMP_ERROR;
- goto trace0;
- }
+ if (PREDICT_FALSE (ip0->ttl == 1))
+ {
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
+ icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
+ ICMP4_time_exceeded_ttl_exceeded_in_transit,
+ 0);
+ next0 = SNAT_IN2OUT_NEXT_ICMP_ERROR;
+ goto trace0;
+ }
- proto0 = ip_proto_to_snat_proto (ip0->protocol);
+ proto0 = ip_proto_to_snat_proto (ip0->protocol);
- /* Next configured feature, probably ip4-lookup */
- if (is_slow_path)
- {
- if (PREDICT_FALSE (proto0 == ~0))
- {
- if (nat_in2out_sm_unknown_proto (sm, b0, ip0, rx_fib_index0))
- {
- next0 = SNAT_IN2OUT_NEXT_DROP;
- b0->error = node->errors[SNAT_IN2OUT_ERROR_UNSUPPORTED_PROTOCOL];
- }
- goto trace0;
- }
+ /* Next configured feature, probably ip4-lookup */
+ if (is_slow_path)
+ {
+ if (PREDICT_FALSE (proto0 == ~0))
+ {
+ if (nat_in2out_sm_unknown_proto
+ (sm, b0, ip0, rx_fib_index0))
+ {
+ next0 = SNAT_IN2OUT_NEXT_DROP;
+ b0->error =
+ node->errors[SNAT_IN2OUT_ERROR_UNSUPPORTED_PROTOCOL];
+ }
+ goto trace0;
+ }
- if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
- {
- next0 = icmp_in2out_slow_path
- (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
- next0, now, thread_index, &s0);
- goto trace0;
- }
- }
- else
- {
- if (PREDICT_FALSE (proto0 == ~0 || proto0 == SNAT_PROTOCOL_ICMP))
- {
- next0 = SNAT_IN2OUT_NEXT_SLOW_PATH;
- goto trace0;
- }
+ if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
+ {
+ next0 = icmp_in2out_slow_path
+ (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
+ next0, now, thread_index, &s0);
+ goto trace0;
+ }
+ }
+ else
+ {
+ if (PREDICT_FALSE
+ (proto0 == ~0 || proto0 == SNAT_PROTOCOL_ICMP))
+ {
+ next0 = SNAT_IN2OUT_NEXT_SLOW_PATH;
+ goto trace0;
+ }
- if (ip4_is_fragment (ip0))
- {
- next0 = SNAT_IN2OUT_NEXT_REASS;
- goto trace0;
- }
- }
+ if (ip4_is_fragment (ip0))
+ {
+ next0 = SNAT_IN2OUT_NEXT_REASS;
+ goto trace0;
+ }
+ }
- key0.addr = ip0->src_address;
- key0.port = udp0->src_port;
- key0.protocol = proto0;
- key0.fib_index = rx_fib_index0;
+ key0.addr = ip0->src_address;
+ key0.port = udp0->src_port;
+ key0.protocol = proto0;
+ key0.fib_index = rx_fib_index0;
- kv0.key = key0.as_u64;
+ kv0.key = key0.as_u64;
- if (clib_bihash_search_8_8 (&sm->per_thread_data[thread_index].in2out,
- &kv0, &value0))
- {
- if (is_slow_path)
- {
- if (is_output_feature)
- {
- if (PREDICT_FALSE(nat_not_translate_output_feature(sm,
- ip0, proto0, udp0->src_port, udp0->dst_port, thread_index, sw_if_index0)))
- goto trace0;
- }
- else
- {
- if (PREDICT_FALSE(snat_not_translate(sm, node, sw_if_index0,
- ip0, proto0, rx_fib_index0, thread_index)))
- goto trace0;
- }
-
- next0 = slow_path (sm, b0, ip0, rx_fib_index0, &key0,
- &s0, node, next0, thread_index, now);
-
- if (PREDICT_FALSE (next0 == SNAT_IN2OUT_NEXT_DROP))
- goto trace0;
- }
- else
- {
- next0 = SNAT_IN2OUT_NEXT_SLOW_PATH;
- goto trace0;
- }
- }
- else
- s0 = pool_elt_at_index (sm->per_thread_data[thread_index].sessions,
- value0.value);
+ if (clib_bihash_search_8_8
+ (&sm->per_thread_data[thread_index].in2out, &kv0, &value0))
+ {
+ if (is_slow_path)
+ {
+ if (is_output_feature)
+ {
+ if (PREDICT_FALSE (nat_not_translate_output_feature (sm,
+ ip0,
+ proto0,
+ udp0->src_port,
+ udp0->dst_port,
+ thread_index,
+ sw_if_index0)))
+ goto trace0;
+ }
+ else
+ {
+ if (PREDICT_FALSE
+ (snat_not_translate
+ (sm, node, sw_if_index0, ip0, proto0,
+ rx_fib_index0, thread_index)))
+ goto trace0;
+ }
+
+ next0 = slow_path (sm, b0, ip0, rx_fib_index0, &key0,
+ &s0, node, next0, thread_index, now);
+
+ if (PREDICT_FALSE (next0 == SNAT_IN2OUT_NEXT_DROP))
+ goto trace0;
+ }
+ else
+ {
+ next0 = SNAT_IN2OUT_NEXT_SLOW_PATH;
+ goto trace0;
+ }
+ }
+ else
+ s0 =
+ pool_elt_at_index (sm->per_thread_data[thread_index].sessions,
+ value0.value);
- b0->flags |= VNET_BUFFER_F_IS_NATED;
+ b0->flags |= VNET_BUFFER_F_IS_NATED;
- old_addr0 = ip0->src_address.as_u32;
- ip0->src_address = s0->out2in.addr;
- new_addr0 = ip0->src_address.as_u32;
- if (!is_output_feature)
- vnet_buffer(b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index;
+ old_addr0 = ip0->src_address.as_u32;
+ ip0->src_address = s0->out2in.addr;
+ new_addr0 = ip0->src_address.as_u32;
+ if (!is_output_feature)
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index;
- sum0 = ip0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
- ip4_header_t,
- src_address /* changed member */);
- ip0->checksum = ip_csum_fold (sum0);
+ sum0 = ip0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
+ ip4_header_t,
+ src_address /* changed member */ );
+ ip0->checksum = ip_csum_fold (sum0);
- if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP))
- {
- old_port0 = tcp0->src_port;
- tcp0->src_port = s0->out2in.port;
- new_port0 = tcp0->src_port;
-
- sum0 = tcp0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
- ip4_header_t,
- dst_address /* changed member */);
- sum0 = ip_csum_update (sum0, old_port0, new_port0,
- ip4_header_t /* cheat */,
- length /* changed member */);
- mss_clamping (sm, tcp0, &sum0);
- tcp0->checksum = ip_csum_fold(sum0);
- }
- else
- {
- old_port0 = udp0->src_port;
- udp0->src_port = s0->out2in.port;
- udp0->checksum = 0;
- }
+ if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
+ {
+ old_port0 = tcp0->src_port;
+ tcp0->src_port = s0->out2in.port;
+ new_port0 = tcp0->src_port;
+
+ sum0 = tcp0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
+ ip4_header_t,
+ dst_address /* changed member */ );
+ sum0 = ip_csum_update (sum0, old_port0, new_port0,
+ ip4_header_t /* cheat */ ,
+ length /* changed member */ );
+ mss_clamping (sm, tcp0, &sum0);
+ tcp0->checksum = ip_csum_fold (sum0);
+ }
+ else
+ {
+ old_port0 = udp0->src_port;
+ udp0->src_port = s0->out2in.port;
+ udp0->checksum = 0;
+ }
- /* Accounting */
- nat44_session_update_counters (s0, now,
- vlib_buffer_length_in_chain (vm, b0));
- /* Per-user LRU list maintenance */
- nat44_session_update_lru (sm, s0, thread_index);
+ /* Accounting */
+ nat44_session_update_counters (s0, now,
+ vlib_buffer_length_in_chain (vm,
+ b0));
+ /* Per-user LRU list maintenance */
+ nat44_session_update_lru (sm, s0, thread_index);
- trace0:
- if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b0->flags & VLIB_BUFFER_IS_TRACED)))
- {
- snat_in2out_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->is_slow_path = is_slow_path;
- t->sw_if_index = sw_if_index0;
- t->next_index = next0;
- t->session_index = ~0;
- if (s0)
- t->session_index = s0 - sm->per_thread_data[thread_index].sessions;
- }
+ trace0:
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ snat_in2out_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->is_slow_path = is_slow_path;
+ t->sw_if_index = sw_if_index0;
+ t->next_index = next0;
+ t->session_index = ~0;
+ if (s0)
+ t->session_index =
+ s0 - sm->per_thread_data[thread_index].sessions;
+ }
- pkts_processed += next0 != SNAT_IN2OUT_NEXT_DROP;
+ pkts_processed += next0 != SNAT_IN2OUT_NEXT_DROP;
- /* verify speculative enqueue, maybe switch current next frame */
+ /* verify speculative enqueue, maybe switch current next frame */
vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
to_next, n_left_to_next,
bi0, next0);
}
vlib_node_increment_counter (vm, stats_node_index,
- SNAT_IN2OUT_ERROR_IN2OUT_PACKETS,
- pkts_processed);
+ SNAT_IN2OUT_ERROR_IN2OUT_PACKETS,
+ pkts_processed);
return frame->n_vectors;
}
static uword
snat_in2out_fast_path_fn (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
+ vlib_node_runtime_t * node, vlib_frame_t * frame)
{
- return snat_in2out_node_fn_inline (vm, node, frame, 0 /* is_slow_path */, 0);
+ return snat_in2out_node_fn_inline (vm, node, frame, 0 /* is_slow_path */ ,
+ 0);
}
+/* *INDENT-OFF* */
VLIB_REGISTER_NODE (snat_in2out_node) = {
.function = snat_in2out_fast_path_fn,
.name = "nat44-in2out",
[SNAT_IN2OUT_NEXT_REASS] = "nat44-in2out-reass",
},
};
+/* *INDENT-ON* */
VLIB_NODE_FUNCTION_MULTIARCH (snat_in2out_node, snat_in2out_fast_path_fn);
static uword
snat_in2out_output_fast_path_fn (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
{
- return snat_in2out_node_fn_inline (vm, node, frame, 0 /* is_slow_path */, 1);
+ return snat_in2out_node_fn_inline (vm, node, frame, 0 /* is_slow_path */ ,
+ 1);
}
+/* *INDENT-OFF* */
VLIB_REGISTER_NODE (snat_in2out_output_node) = {
.function = snat_in2out_output_fast_path_fn,
.name = "nat44-in2out-output",
[SNAT_IN2OUT_NEXT_REASS] = "nat44-in2out-reass",
},
};
+/* *INDENT-ON* */
VLIB_NODE_FUNCTION_MULTIARCH (snat_in2out_output_node,
- snat_in2out_output_fast_path_fn);
+ snat_in2out_output_fast_path_fn);
static uword
snat_in2out_slow_path_fn (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
+ vlib_node_runtime_t * node, vlib_frame_t * frame)
{
- return snat_in2out_node_fn_inline (vm, node, frame, 1 /* is_slow_path */, 0);
+ return snat_in2out_node_fn_inline (vm, node, frame, 1 /* is_slow_path */ ,
+ 0);
}
+/* *INDENT-OFF* */
VLIB_REGISTER_NODE (snat_in2out_slowpath_node) = {
.function = snat_in2out_slow_path_fn,
.name = "nat44-in2out-slowpath",
[SNAT_IN2OUT_NEXT_REASS] = "nat44-in2out-reass",
},
};
+/* *INDENT-ON* */
VLIB_NODE_FUNCTION_MULTIARCH (snat_in2out_slowpath_node,
- snat_in2out_slow_path_fn);
+ snat_in2out_slow_path_fn);
static uword
snat_in2out_output_slow_path_fn (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
{
- return snat_in2out_node_fn_inline (vm, node, frame, 1 /* is_slow_path */, 1);
+ return snat_in2out_node_fn_inline (vm, node, frame, 1 /* is_slow_path */ ,
+ 1);
}
+/* *INDENT-OFF* */
VLIB_REGISTER_NODE (snat_in2out_output_slowpath_node) = {
.function = snat_in2out_output_slow_path_fn,
.name = "nat44-in2out-output-slowpath",
[SNAT_IN2OUT_NEXT_REASS] = "nat44-in2out-reass",
},
};
+/* *INDENT-ON* */
VLIB_NODE_FUNCTION_MULTIARCH (snat_in2out_output_slowpath_node,
- snat_in2out_output_slow_path_fn);
+ snat_in2out_output_slow_path_fn);
-extern vnet_feature_arc_registration_t vnet_feat_arc_ip4_local;
-
-static inline uword
-nat44_hairpinning_fn_inline (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame,
- int is_ed)
+static uword
+nat44_in2out_reass_node_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * frame)
{
- u32 n_left_from, * from, * to_next, stats_node_index;
+ u32 n_left_from, *from, *to_next;
snat_in2out_next_t next_index;
u32 pkts_processed = 0;
- snat_main_t * sm = &snat_main;
- vnet_feature_main_t *fm = &feature_main;
- u8 arc_index = vnet_feat_arc_ip4_local.feature_arc_index;
- vnet_feature_config_main_t *cm = &fm->feature_config_mains[arc_index];
+ snat_main_t *sm = &snat_main;
+ f64 now = vlib_time_now (vm);
+ u32 thread_index = vm->thread_index;
+ snat_main_per_thread_data_t *per_thread_data =
+ &sm->per_thread_data[thread_index];
+ u32 *fragments_to_drop = 0;
+ u32 *fragments_to_loopback = 0;
- stats_node_index = is_ed ? nat44_ed_hairpinning_node.index :
- nat44_hairpinning_node.index;
from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
next_index = node->cached_next_index;
{
u32 n_left_to_next;
- vlib_get_next_frame (vm, node, next_index,
- to_next, n_left_to_next);
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
while (n_left_from > 0 && n_left_to_next > 0)
{
- u32 bi0;
- vlib_buffer_t * b0;
- u32 next0;
- ip4_header_t * ip0;
- u32 proto0;
- udp_header_t * udp0;
- tcp_header_t * tcp0;
-
- /* speculatively enqueue b0 to the current next frame */
+ u32 bi0, sw_if_index0, proto0, rx_fib_index0, new_addr0, old_addr0;
+ vlib_buffer_t *b0;
+ u32 next0;
+ u8 cached0 = 0;
+ ip4_header_t *ip0;
+ nat_reass_ip4_t *reass0;
+ udp_header_t *udp0;
+ tcp_header_t *tcp0;
+ snat_session_key_t key0;
+ clib_bihash_kv_8_8_t kv0, value0;
+ snat_session_t *s0 = 0;
+ u16 old_port0, new_port0;
+ ip_csum_t sum0;
+
+ /* speculatively enqueue b0 to the current next frame */
bi0 = from[0];
to_next[0] = bi0;
from += 1;
n_left_to_next -= 1;
b0 = vlib_get_buffer (vm, bi0);
- ip0 = vlib_buffer_get_current (b0);
- udp0 = ip4_next_header (ip0);
- tcp0 = (tcp_header_t *) udp0;
+ next0 = SNAT_IN2OUT_NEXT_LOOKUP;
- proto0 = ip_proto_to_snat_proto (ip0->protocol);
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+ rx_fib_index0 =
+ fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
+ sw_if_index0);
- vnet_get_config_data (&cm->config_main, &b0->current_config_index,
- &next0, 0);
+ if (PREDICT_FALSE (nat_reass_is_drop_frag (0)))
+ {
+ next0 = SNAT_IN2OUT_NEXT_DROP;
+ b0->error = node->errors[SNAT_IN2OUT_ERROR_DROP_FRAGMENT];
+ goto trace0;
+ }
- if (snat_hairpinning (sm, b0, ip0, udp0, tcp0, proto0, is_ed))
- next0 = SNAT_IN2OUT_NEXT_LOOKUP;
+ ip0 = (ip4_header_t *) vlib_buffer_get_current (b0);
+ udp0 = ip4_next_header (ip0);
+ tcp0 = (tcp_header_t *) udp0;
+ proto0 = ip_proto_to_snat_proto (ip0->protocol);
- pkts_processed += next0 != SNAT_IN2OUT_NEXT_DROP;
+ reass0 = nat_ip4_reass_find_or_create (ip0->src_address,
+ ip0->dst_address,
+ ip0->fragment_id,
+ ip0->protocol,
+ 1, &fragments_to_drop);
- /* verify speculative enqueue, maybe switch current next frame */
- vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
- to_next, n_left_to_next,
- bi0, next0);
- }
+ if (PREDICT_FALSE (!reass0))
+ {
+ next0 = SNAT_IN2OUT_NEXT_DROP;
+ b0->error = node->errors[SNAT_IN2OUT_ERROR_MAX_REASS];
+ nat_log_notice ("maximum reassemblies exceeded");
+ goto trace0;
+ }
+
+ if (PREDICT_FALSE (ip4_is_first_fragment (ip0)))
+ {
+ key0.addr = ip0->src_address;
+ key0.port = udp0->src_port;
+ key0.protocol = proto0;
+ key0.fib_index = rx_fib_index0;
+ kv0.key = key0.as_u64;
+
+ if (clib_bihash_search_8_8
+ (&per_thread_data->in2out, &kv0, &value0))
+ {
+ if (PREDICT_FALSE
+ (snat_not_translate
+ (sm, node, sw_if_index0, ip0, proto0, rx_fib_index0,
+ thread_index)))
+ goto trace0;
+
+ next0 = slow_path (sm, b0, ip0, rx_fib_index0, &key0,
+ &s0, node, next0, thread_index, now);
+
+ if (PREDICT_FALSE (next0 == SNAT_IN2OUT_NEXT_DROP))
+ goto trace0;
+
+ reass0->sess_index = s0 - per_thread_data->sessions;
+ }
+ else
+ {
+ s0 = pool_elt_at_index (per_thread_data->sessions,
+ value0.value);
+ reass0->sess_index = value0.value;
+ }
+ nat_ip4_reass_get_frags (reass0, &fragments_to_loopback);
+ }
+ else
+ {
+ if (PREDICT_FALSE (reass0->sess_index == (u32) ~ 0))
+ {
+ if (nat_ip4_reass_add_fragment
+ (reass0, bi0, &fragments_to_drop))
+ {
+ b0->error = node->errors[SNAT_IN2OUT_ERROR_MAX_FRAG];
+ nat_log_notice
+ ("maximum fragments per reassembly exceeded");
+ next0 = SNAT_IN2OUT_NEXT_DROP;
+ goto trace0;
+ }
+ cached0 = 1;
+ goto trace0;
+ }
+ s0 = pool_elt_at_index (per_thread_data->sessions,
+ reass0->sess_index);
+ }
+
+ old_addr0 = ip0->src_address.as_u32;
+ ip0->src_address = s0->out2in.addr;
+ new_addr0 = ip0->src_address.as_u32;
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index;
+
+ sum0 = ip0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
+ ip4_header_t,
+ src_address /* changed member */ );
+ ip0->checksum = ip_csum_fold (sum0);
+
+ if (PREDICT_FALSE (ip4_is_first_fragment (ip0)))
+ {
+ if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
+ {
+ old_port0 = tcp0->src_port;
+ tcp0->src_port = s0->out2in.port;
+ new_port0 = tcp0->src_port;
+
+ sum0 = tcp0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
+ ip4_header_t,
+ dst_address /* changed member */ );
+ sum0 = ip_csum_update (sum0, old_port0, new_port0,
+ ip4_header_t /* cheat */ ,
+ length /* changed member */ );
+ tcp0->checksum = ip_csum_fold (sum0);
+ }
+ else
+ {
+ old_port0 = udp0->src_port;
+ udp0->src_port = s0->out2in.port;
+ udp0->checksum = 0;
+ }
+ }
+
+ /* Hairpinning */
+ nat44_reass_hairpinning (sm, b0, ip0, s0->out2in.port,
+ s0->ext_host_port, proto0, 0);
+
+ /* Accounting */
+ nat44_session_update_counters (s0, now,
+ vlib_buffer_length_in_chain (vm,
+ b0));
+ /* Per-user LRU list maintenance */
+ nat44_session_update_lru (sm, s0, thread_index);
+
+ trace0:
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ nat44_reass_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->cached = cached0;
+ t->sw_if_index = sw_if_index0;
+ t->next_index = next0;
+ }
+
+ if (cached0)
+ {
+ n_left_to_next++;
+ to_next--;
+ }
+ else
+ {
+ pkts_processed += next0 != SNAT_IN2OUT_NEXT_DROP;
+
+ /* verify speculative enqueue, maybe switch current next frame */
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
+ to_next, n_left_to_next,
+ bi0, next0);
+ }
+
+ if (n_left_from == 0 && vec_len (fragments_to_loopback))
+ {
+ from = vlib_frame_vector_args (frame);
+ u32 len = vec_len (fragments_to_loopback);
+ if (len <= VLIB_FRAME_SIZE)
+ {
+ clib_memcpy (from, fragments_to_loopback,
+ sizeof (u32) * len);
+ n_left_from = len;
+ vec_reset_length (fragments_to_loopback);
+ }
+ else
+ {
+ clib_memcpy (from,
+ fragments_to_loopback + (len -
+ VLIB_FRAME_SIZE),
+ sizeof (u32) * VLIB_FRAME_SIZE);
+ n_left_from = VLIB_FRAME_SIZE;
+ _vec_len (fragments_to_loopback) = len - VLIB_FRAME_SIZE;
+ }
+ }
+ }
vlib_put_next_frame (vm, node, next_index, n_left_to_next);
}
- vlib_node_increment_counter (vm, stats_node_index,
- SNAT_IN2OUT_ERROR_IN2OUT_PACKETS,
- pkts_processed);
- return frame->n_vectors;
-}
+ vlib_node_increment_counter (vm, nat44_in2out_reass_node.index,
+ SNAT_IN2OUT_ERROR_IN2OUT_PACKETS,
+ pkts_processed);
-static uword
-nat44_hairpinning_fn (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- return nat44_hairpinning_fn_inline (vm, node, frame, 0);
+ nat_send_all_to_node (vm, fragments_to_drop, node,
+ &node->errors[SNAT_IN2OUT_ERROR_DROP_FRAGMENT],
+ SNAT_IN2OUT_NEXT_DROP);
+
+ vec_free (fragments_to_drop);
+ vec_free (fragments_to_loopback);
+ return frame->n_vectors;
}
-VLIB_REGISTER_NODE (nat44_hairpinning_node) = {
- .function = nat44_hairpinning_fn,
- .name = "nat44-hairpinning",
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (nat44_in2out_reass_node) = {
+ .function = nat44_in2out_reass_node_fn,
+ .name = "nat44-in2out-reass",
.vector_size = sizeof (u32),
+ .format_trace = format_nat44_reass_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
+
.n_errors = ARRAY_LEN(snat_in2out_error_strings),
.error_strings = snat_in2out_error_strings,
- .n_next_nodes = 2,
+
+ .n_next_nodes = SNAT_IN2OUT_N_NEXT,
.next_nodes = {
[SNAT_IN2OUT_NEXT_DROP] = "error-drop",
[SNAT_IN2OUT_NEXT_LOOKUP] = "ip4-lookup",
+ [SNAT_IN2OUT_NEXT_SLOW_PATH] = "nat44-in2out-slowpath",
+ [SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
+ [SNAT_IN2OUT_NEXT_REASS] = "nat44-in2out-reass",
},
};
+/* *INDENT-ON* */
-VLIB_NODE_FUNCTION_MULTIARCH (nat44_hairpinning_node,
- nat44_hairpinning_fn);
+VLIB_NODE_FUNCTION_MULTIARCH (nat44_in2out_reass_node,
+ nat44_in2out_reass_node_fn);
static uword
-nat44_ed_hairpinning_fn (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
+snat_in2out_fast_static_map_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
{
- return nat44_hairpinning_fn_inline (vm, node, frame, 1);
-}
-
-VLIB_REGISTER_NODE (nat44_ed_hairpinning_node) = {
- .function = nat44_ed_hairpinning_fn,
- .name = "nat44-ed-hairpinning",
- .vector_size = sizeof (u32),
- .type = VLIB_NODE_TYPE_INTERNAL,
- .n_errors = ARRAY_LEN(snat_in2out_error_strings),
- .error_strings = snat_in2out_error_strings,
- .n_next_nodes = 2,
- .next_nodes = {
- [SNAT_IN2OUT_NEXT_DROP] = "error-drop",
- [SNAT_IN2OUT_NEXT_LOOKUP] = "ip4-lookup",
- },
-};
-
-VLIB_NODE_FUNCTION_MULTIARCH (nat44_ed_hairpinning_node,
- nat44_ed_hairpinning_fn);
-
-static inline void
-nat44_reass_hairpinning (snat_main_t *sm,
- vlib_buffer_t * b0,
- ip4_header_t * ip0,
- u16 sport,
- u16 dport,
- u32 proto0,
- int is_ed)
-{
- snat_session_key_t key0, sm0;
- snat_session_t * s0;
- clib_bihash_kv_8_8_t kv0, value0;
- ip_csum_t sum0;
- u32 new_dst_addr0 = 0, old_dst_addr0, ti = 0, si;
- u16 new_dst_port0, old_dst_port0;
- udp_header_t * udp0;
- tcp_header_t * tcp0;
- int rv;
-
- key0.addr = ip0->dst_address;
- key0.port = dport;
- key0.protocol = proto0;
- key0.fib_index = sm->outside_fib_index;
- kv0.key = key0.as_u64;
-
- udp0 = ip4_next_header (ip0);
-
- /* Check if destination is static mappings */
- if (!snat_static_mapping_match(sm, key0, &sm0, 1, 0, 0, 0, 0))
- {
- new_dst_addr0 = sm0.addr.as_u32;
- new_dst_port0 = sm0.port;
- vnet_buffer(b0)->sw_if_index[VLIB_TX] = sm0.fib_index;
- }
- /* or active sessions */
- else
- {
- if (sm->num_workers > 1)
- ti = (clib_net_to_host_u16 (udp0->dst_port) - 1024) / sm->port_per_thread;
- else
- ti = sm->num_workers;
-
- if (is_ed)
- {
- clib_bihash_kv_16_8_t ed_kv, ed_value;
- make_ed_kv (&ed_kv, &ip0->dst_address, &ip0->src_address,
- ip0->protocol, sm->outside_fib_index, udp0->dst_port,
- udp0->src_port);
- rv = clib_bihash_search_16_8 (&sm->per_thread_data[ti].out2in_ed,
- &ed_kv, &ed_value);
- si = ed_value.value;
- }
- else
- {
- rv = clib_bihash_search_8_8 (&sm->per_thread_data[ti].out2in, &kv0,
- &value0);
- si = value0.value;
- }
- if (!rv)
- {
- s0 = pool_elt_at_index (sm->per_thread_data[ti].sessions, si);
- new_dst_addr0 = s0->in2out.addr.as_u32;
- new_dst_port0 = s0->in2out.port;
- vnet_buffer(b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index;
- }
- }
-
- /* Destination is behind the same NAT, use internal address and port */
- if (new_dst_addr0)
- {
- old_dst_addr0 = ip0->dst_address.as_u32;
- ip0->dst_address.as_u32 = new_dst_addr0;
- sum0 = ip0->checksum;
- sum0 = ip_csum_update (sum0, old_dst_addr0, new_dst_addr0,
- ip4_header_t, dst_address);
- ip0->checksum = ip_csum_fold (sum0);
-
- old_dst_port0 = dport;
- if (PREDICT_TRUE(new_dst_port0 != old_dst_port0 &&
- ip4_is_first_fragment (ip0)))
- {
- if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP))
- {
- tcp0 = ip4_next_header (ip0);
- tcp0->dst = new_dst_port0;
- sum0 = tcp0->checksum;
- sum0 = ip_csum_update (sum0, old_dst_addr0, new_dst_addr0,
- ip4_header_t, dst_address);
- sum0 = ip_csum_update (sum0, old_dst_port0, new_dst_port0,
- ip4_header_t /* cheat */, length);
- tcp0->checksum = ip_csum_fold(sum0);
- }
- else
- {
- udp0->dst_port = new_dst_port0;
- udp0->checksum = 0;
- }
- }
- else
- {
- if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP))
- {
- tcp0 = ip4_next_header (ip0);
- sum0 = tcp0->checksum;
- sum0 = ip_csum_update (sum0, old_dst_addr0, new_dst_addr0,
- ip4_header_t, dst_address);
- tcp0->checksum = ip_csum_fold(sum0);
- }
- }
- }
-}
-
-static uword
-nat44_in2out_reass_node_fn (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- u32 n_left_from, *from, *to_next;
- snat_in2out_next_t next_index;
- u32 pkts_processed = 0;
- snat_main_t *sm = &snat_main;
- f64 now = vlib_time_now (vm);
- u32 thread_index = vm->thread_index;
- snat_main_per_thread_data_t *per_thread_data =
- &sm->per_thread_data[thread_index];
- u32 *fragments_to_drop = 0;
- u32 *fragments_to_loopback = 0;
-
- from = vlib_frame_vector_args (frame);
- n_left_from = frame->n_vectors;
- next_index = node->cached_next_index;
-
- while (n_left_from > 0)
- {
- u32 n_left_to_next;
-
- vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
-
- while (n_left_from > 0 && n_left_to_next > 0)
- {
- u32 bi0, sw_if_index0, proto0, rx_fib_index0, new_addr0, old_addr0;
- vlib_buffer_t *b0;
- u32 next0;
- u8 cached0 = 0;
- ip4_header_t *ip0;
- nat_reass_ip4_t *reass0;
- udp_header_t * udp0;
- tcp_header_t * tcp0;
- snat_session_key_t key0;
- clib_bihash_kv_8_8_t kv0, value0;
- snat_session_t * s0 = 0;
- u16 old_port0, new_port0;
- ip_csum_t sum0;
-
- /* speculatively enqueue b0 to the current next frame */
- bi0 = from[0];
- to_next[0] = bi0;
- from += 1;
- to_next += 1;
- n_left_from -= 1;
- n_left_to_next -= 1;
-
- b0 = vlib_get_buffer (vm, bi0);
- next0 = SNAT_IN2OUT_NEXT_LOOKUP;
-
- sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
- rx_fib_index0 = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
- sw_if_index0);
-
- if (PREDICT_FALSE (nat_reass_is_drop_frag(0)))
- {
- next0 = SNAT_IN2OUT_NEXT_DROP;
- b0->error = node->errors[SNAT_IN2OUT_ERROR_DROP_FRAGMENT];
- goto trace0;
- }
-
- ip0 = (ip4_header_t *) vlib_buffer_get_current (b0);
- udp0 = ip4_next_header (ip0);
- tcp0 = (tcp_header_t *) udp0;
- proto0 = ip_proto_to_snat_proto (ip0->protocol);
-
- reass0 = nat_ip4_reass_find_or_create (ip0->src_address,
- ip0->dst_address,
- ip0->fragment_id,
- ip0->protocol,
- 1,
- &fragments_to_drop);
-
- if (PREDICT_FALSE (!reass0))
- {
- next0 = SNAT_IN2OUT_NEXT_DROP;
- b0->error = node->errors[SNAT_IN2OUT_ERROR_MAX_REASS];
- nat_log_notice ("maximum reassemblies exceeded");
- goto trace0;
- }
-
- if (PREDICT_FALSE (ip4_is_first_fragment (ip0)))
- {
- key0.addr = ip0->src_address;
- key0.port = udp0->src_port;
- key0.protocol = proto0;
- key0.fib_index = rx_fib_index0;
- kv0.key = key0.as_u64;
-
- if (clib_bihash_search_8_8 (&per_thread_data->in2out, &kv0, &value0))
- {
- if (PREDICT_FALSE(snat_not_translate(sm, node, sw_if_index0,
- ip0, proto0, rx_fib_index0, thread_index)))
- goto trace0;
-
- next0 = slow_path (sm, b0, ip0, rx_fib_index0, &key0,
- &s0, node, next0, thread_index, now);
-
- if (PREDICT_FALSE (next0 == SNAT_IN2OUT_NEXT_DROP))
- goto trace0;
-
- reass0->sess_index = s0 - per_thread_data->sessions;
- }
- else
- {
- s0 = pool_elt_at_index (per_thread_data->sessions,
- value0.value);
- reass0->sess_index = value0.value;
- }
- nat_ip4_reass_get_frags (reass0, &fragments_to_loopback);
- }
- else
- {
- if (PREDICT_FALSE (reass0->sess_index == (u32) ~0))
- {
- if (nat_ip4_reass_add_fragment (reass0, bi0, &fragments_to_drop))
- {
- b0->error = node->errors[SNAT_IN2OUT_ERROR_MAX_FRAG];
- nat_log_notice ("maximum fragments per reassembly exceeded");
- next0 = SNAT_IN2OUT_NEXT_DROP;
- goto trace0;
- }
- cached0 = 1;
- goto trace0;
- }
- s0 = pool_elt_at_index (per_thread_data->sessions,
- reass0->sess_index);
- }
-
- old_addr0 = ip0->src_address.as_u32;
- ip0->src_address = s0->out2in.addr;
- new_addr0 = ip0->src_address.as_u32;
- vnet_buffer(b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index;
-
- sum0 = ip0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
- ip4_header_t,
- src_address /* changed member */);
- ip0->checksum = ip_csum_fold (sum0);
-
- if (PREDICT_FALSE (ip4_is_first_fragment (ip0)))
- {
- if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP))
- {
- old_port0 = tcp0->src_port;
- tcp0->src_port = s0->out2in.port;
- new_port0 = tcp0->src_port;
-
- sum0 = tcp0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
- ip4_header_t,
- dst_address /* changed member */);
- sum0 = ip_csum_update (sum0, old_port0, new_port0,
- ip4_header_t /* cheat */,
- length /* changed member */);
- tcp0->checksum = ip_csum_fold(sum0);
- }
- else
- {
- old_port0 = udp0->src_port;
- udp0->src_port = s0->out2in.port;
- udp0->checksum = 0;
- }
- }
-
- /* Hairpinning */
- nat44_reass_hairpinning (sm, b0, ip0, s0->out2in.port,
- s0->ext_host_port, proto0, 0);
-
- /* Accounting */
- nat44_session_update_counters (s0, now,
- vlib_buffer_length_in_chain (vm, b0));
- /* Per-user LRU list maintenance */
- nat44_session_update_lru (sm, s0, thread_index);
-
- trace0:
- if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b0->flags & VLIB_BUFFER_IS_TRACED)))
- {
- nat44_in2out_reass_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->cached = cached0;
- t->sw_if_index = sw_if_index0;
- t->next_index = next0;
- }
-
- if (cached0)
- {
- n_left_to_next++;
- to_next--;
- }
- else
- {
- pkts_processed += next0 != SNAT_IN2OUT_NEXT_DROP;
-
- /* verify speculative enqueue, maybe switch current next frame */
- vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
- to_next, n_left_to_next,
- bi0, next0);
- }
-
- if (n_left_from == 0 && vec_len (fragments_to_loopback))
- {
- from = vlib_frame_vector_args (frame);
- u32 len = vec_len (fragments_to_loopback);
- if (len <= VLIB_FRAME_SIZE)
- {
- clib_memcpy (from, fragments_to_loopback, sizeof (u32) * len);
- n_left_from = len;
- vec_reset_length (fragments_to_loopback);
- }
- else
- {
- clib_memcpy (from,
- fragments_to_loopback + (len - VLIB_FRAME_SIZE),
- sizeof (u32) * VLIB_FRAME_SIZE);
- n_left_from = VLIB_FRAME_SIZE;
- _vec_len (fragments_to_loopback) = len - VLIB_FRAME_SIZE;
- }
- }
- }
-
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
- }
-
- vlib_node_increment_counter (vm, nat44_in2out_reass_node.index,
- SNAT_IN2OUT_ERROR_IN2OUT_PACKETS,
- pkts_processed);
-
- nat_send_all_to_node (vm, fragments_to_drop, node,
- &node->errors[SNAT_IN2OUT_ERROR_DROP_FRAGMENT],
- SNAT_IN2OUT_NEXT_DROP);
-
- vec_free (fragments_to_drop);
- vec_free (fragments_to_loopback);
- return frame->n_vectors;
-}
-
-VLIB_REGISTER_NODE (nat44_in2out_reass_node) = {
- .function = nat44_in2out_reass_node_fn,
- .name = "nat44-in2out-reass",
- .vector_size = sizeof (u32),
- .format_trace = format_nat44_in2out_reass_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
-
- .n_errors = ARRAY_LEN(snat_in2out_error_strings),
- .error_strings = snat_in2out_error_strings,
-
- .n_next_nodes = SNAT_IN2OUT_N_NEXT,
- .next_nodes = {
- [SNAT_IN2OUT_NEXT_DROP] = "error-drop",
- [SNAT_IN2OUT_NEXT_LOOKUP] = "ip4-lookup",
- [SNAT_IN2OUT_NEXT_SLOW_PATH] = "nat44-in2out-slowpath",
- [SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
- [SNAT_IN2OUT_NEXT_REASS] = "nat44-in2out-reass",
- },
-};
-
-VLIB_NODE_FUNCTION_MULTIARCH (nat44_in2out_reass_node,
- nat44_in2out_reass_node_fn);
-
-/*******************************/
-/*** endpoint-dependent mode ***/
-/*******************************/
-
-static_always_inline int
-icmp_get_ed_key(ip4_header_t *ip0, nat_ed_ses_key_t *p_key0)
-{
- icmp46_header_t *icmp0;
- nat_ed_ses_key_t key0;
- icmp_echo_header_t *echo0, *inner_echo0 = 0;
- ip4_header_t *inner_ip0 = 0;
- void *l4_header = 0;
- icmp46_header_t *inner_icmp0;
-
- icmp0 = (icmp46_header_t *) ip4_next_header (ip0);
- echo0 = (icmp_echo_header_t *)(icmp0+1);
-
- if (!icmp_is_error_message (icmp0))
- {
- key0.proto = IP_PROTOCOL_ICMP;
- key0.l_addr = ip0->src_address;
- key0.r_addr = ip0->dst_address;
- key0.l_port = echo0->identifier;
- key0.r_port = 0;
- }
- else
- {
- inner_ip0 = (ip4_header_t *)(echo0+1);
- l4_header = ip4_next_header (inner_ip0);
- key0.proto = inner_ip0->protocol;
- key0.r_addr = inner_ip0->src_address;
- key0.l_addr = inner_ip0->dst_address;
- switch (ip_proto_to_snat_proto (inner_ip0->protocol))
- {
- case SNAT_PROTOCOL_ICMP:
- inner_icmp0 = (icmp46_header_t*)l4_header;
- inner_echo0 = (icmp_echo_header_t *)(inner_icmp0+1);
- key0.r_port = 0;
- key0.l_port = inner_echo0->identifier;
- break;
- case SNAT_PROTOCOL_UDP:
- case SNAT_PROTOCOL_TCP:
- key0.l_port = ((tcp_udp_header_t*)l4_header)->dst_port;
- key0.r_port = ((tcp_udp_header_t*)l4_header)->src_port;
- break;
- default:
- return SNAT_IN2OUT_ERROR_UNSUPPORTED_PROTOCOL;
- }
- }
- *p_key0 = key0;
- return 0;
-}
-
-int
-nat44_i2o_ed_is_idle_session_cb (clib_bihash_kv_16_8_t * kv, void * arg)
-{
- snat_main_t *sm = &snat_main;
- nat44_is_idle_session_ctx_t *ctx = arg;
- snat_session_t *s;
- u64 sess_timeout_time;
- nat_ed_ses_key_t ed_key;
- clib_bihash_kv_16_8_t ed_kv;
- int i;
- snat_address_t *a;
- snat_session_key_t key;
- snat_main_per_thread_data_t *tsm = vec_elt_at_index (sm->per_thread_data,
- ctx->thread_index);
-
- s = pool_elt_at_index (tsm->sessions, kv->value);
- sess_timeout_time = s->last_heard + (f64)nat44_session_get_timeout(sm, s);
- if (ctx->now >= sess_timeout_time)
- {
- if (is_fwd_bypass_session (s))
- goto delete;
-
- ed_key.l_addr = s->out2in.addr;
- ed_key.r_addr = s->ext_host_addr;
- ed_key.fib_index = s->out2in.fib_index;
- if (snat_is_unk_proto_session (s))
- {
- ed_key.proto = s->in2out.port;
- ed_key.r_port = 0;
- ed_key.l_port = 0;
- }
- else
- {
- ed_key.proto = snat_proto_to_ip_proto (s->in2out.protocol);
- ed_key.l_port = s->out2in.port;
- ed_key.r_port = s->ext_host_port;
- }
- ed_kv.key[0] = ed_key.as_u64[0];
- ed_kv.key[1] = ed_key.as_u64[1];
- if (clib_bihash_add_del_16_8 (&tsm->out2in_ed, &ed_kv, 0))
- nat_log_warn ("out2in_ed key del failed");
-
- if (snat_is_unk_proto_session (s))
- goto delete;
-
- snat_ipfix_logging_nat44_ses_delete(s->in2out.addr.as_u32,
- s->out2in.addr.as_u32,
- s->in2out.protocol,
- s->in2out.port,
- s->out2in.port,
- s->in2out.fib_index);
-
- if (is_twice_nat_session (s))
- {
- for (i = 0; i < vec_len (sm->twice_nat_addresses); i++)
- {
- key.protocol = s->in2out.protocol;
- key.port = s->ext_host_nat_port;
- a = sm->twice_nat_addresses + i;
- if (a->addr.as_u32 == s->ext_host_nat_addr.as_u32)
- {
- snat_free_outside_address_and_port (sm->twice_nat_addresses,
- ctx->thread_index, &key);
- break;
- }
- }
- }
-
- if (snat_is_session_static (s))
- goto delete;
-
- if (s->outside_address_index != ~0)
- snat_free_outside_address_and_port (sm->addresses, ctx->thread_index,
- &s->out2in);
- delete:
- nat44_delete_session (sm, s, ctx->thread_index);
- return 1;
- }
-
- return 0;
-}
-
-static inline u32
-icmp_in2out_ed_slow_path (snat_main_t * sm, vlib_buffer_t * b0,
- ip4_header_t * ip0, icmp46_header_t * icmp0,
- u32 sw_if_index0, u32 rx_fib_index0,
- vlib_node_runtime_t * node, u32 next0, f64 now,
- u32 thread_index, snat_session_t ** p_s0)
-{
- next0 = icmp_in2out(sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
- next0, thread_index, p_s0, 0);
- snat_session_t * s0 = *p_s0;
- if (PREDICT_TRUE(next0 != SNAT_IN2OUT_NEXT_DROP && s0))
- {
- /* Hairpinning */
- if (vnet_buffer(b0)->sw_if_index[VLIB_TX] == ~0)
- snat_icmp_hairpinning(sm, b0, ip0, icmp0, sm->endpoint_dependent);
- /* Accounting */
- nat44_session_update_counters (s0, now,
- vlib_buffer_length_in_chain (sm->vlib_main, b0));
- }
- return next0;
-}
-
-static u32
-slow_path_ed (snat_main_t *sm,
- vlib_buffer_t *b,
- u32 rx_fib_index,
- clib_bihash_kv_16_8_t *kv,
- snat_session_t ** sessionp,
- vlib_node_runtime_t * node,
- u32 next,
- u32 thread_index,
- f64 now)
-{
- snat_session_t *s;
- snat_user_t *u;
- snat_session_key_t key0, key1;
- lb_nat_type_t lb = 0, is_sm = 0;
- u32 address_index = ~0;
- snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
- nat_ed_ses_key_t *key = (nat_ed_ses_key_t *) kv->key;
- u32 proto = ip_proto_to_snat_proto (key->proto);
- nat_outside_fib_t *outside_fib;
- fib_node_index_t fei = FIB_NODE_INDEX_INVALID;
- fib_prefix_t pfx = {
- .fp_proto = FIB_PROTOCOL_IP4,
- .fp_len = 32,
- .fp_addr = {
- .ip4.as_u32 = key->r_addr.as_u32,
- },
- };
- nat44_is_idle_session_ctx_t ctx;
-
- if (PREDICT_FALSE (maximum_sessions_exceeded (sm, thread_index)))
- {
- b->error = node->errors[SNAT_IN2OUT_ERROR_MAX_SESSIONS_EXCEEDED];
- nat_ipfix_logging_max_sessions(sm->max_translations);
- nat_log_notice ("maximum sessions exceeded");
- return SNAT_IN2OUT_NEXT_DROP;
- }
-
- key0.addr = key->l_addr;
- key0.port = key->l_port;
- key1.protocol = key0.protocol = proto;
- key0.fib_index = rx_fib_index;
- key1.fib_index = sm->outside_fib_index;
- /* First try to match static mapping by local address and port */
- if (snat_static_mapping_match (sm, key0, &key1, 0, 0, 0, &lb, 0))
- {
- /* Try to create dynamic translation */
- if (snat_alloc_outside_address_and_port (sm->addresses, rx_fib_index,
- thread_index, &key1,
- &address_index,
- sm->port_per_thread,
- tsm->snat_thread_index))
- {
- nat_log_notice ("addresses exhausted");
- b->error = node->errors[SNAT_IN2OUT_ERROR_OUT_OF_PORTS];
- return SNAT_IN2OUT_NEXT_DROP;
- }
- }
- else
- is_sm = 1;
-
- u = nat_user_get_or_create (sm, &key->l_addr, rx_fib_index, thread_index);
- if (!u)
- {
- nat_log_warn ("create NAT user failed");
- if (!is_sm)
- snat_free_outside_address_and_port (sm->addresses,
- thread_index, &key1);
- return SNAT_IN2OUT_NEXT_DROP;
- }
-
- s = nat_ed_session_alloc (sm, u, thread_index);
- if (!s)
- {
- nat44_delete_user_with_no_session (sm, u, thread_index);
- nat_log_warn ("create NAT session failed");
- if (!is_sm)
- snat_free_outside_address_and_port (sm->addresses,
- thread_index, &key1);
- return SNAT_IN2OUT_NEXT_DROP;
- }
-
- user_session_increment (sm, u, is_sm);
- if (is_sm)
- s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING;
- if (lb)
- s->flags |= SNAT_SESSION_FLAG_LOAD_BALANCING;
- s->flags |= SNAT_SESSION_FLAG_ENDPOINT_DEPENDENT;
- s->outside_address_index = address_index;
- s->ext_host_addr = key->r_addr;
- s->ext_host_port = key->r_port;
- s->in2out = key0;
- s->out2in = key1;
- s->out2in.protocol = key0.protocol;
-
- switch (vec_len (sm->outside_fibs))
- {
- case 0:
- s->out2in.fib_index = sm->outside_fib_index;
- break;
- case 1:
- s->out2in.fib_index = sm->outside_fibs[0].fib_index;
- break;
- default:
- vec_foreach (outside_fib, sm->outside_fibs)
- {
- fei = fib_table_lookup (outside_fib->fib_index, &pfx);
- if (FIB_NODE_INDEX_INVALID != fei)
- {
- if (fib_entry_get_resolving_interface (fei) != ~0)
- {
- s->out2in.fib_index = outside_fib->fib_index;
- break;
- }
- }
- }
- break;
- }
-
- /* Add to lookup tables */
- kv->value = s - tsm->sessions;
- ctx.now = now;
- ctx.thread_index = thread_index;
- if (clib_bihash_add_or_overwrite_stale_16_8 (&tsm->in2out_ed, kv,
- nat44_i2o_ed_is_idle_session_cb,
- &ctx))
- nat_log_notice ("in2out-ed key add failed");
-
- make_ed_kv (kv, &key1.addr, &key->r_addr, key->proto, s->out2in.fib_index,
- key1.port, key->r_port);
- kv->value = s - tsm->sessions;
- if (clib_bihash_add_or_overwrite_stale_16_8 (&tsm->out2in_ed, kv,
- nat44_o2i_ed_is_idle_session_cb,
- &ctx))
- nat_log_notice ("out2in-ed key add failed");
-
- *sessionp = s;
-
- /* log NAT event */
- snat_ipfix_logging_nat44_ses_create(s->in2out.addr.as_u32,
- s->out2in.addr.as_u32,
- s->in2out.protocol,
- s->in2out.port,
- s->out2in.port,
- s->in2out.fib_index);
- return next;
-}
-
-static_always_inline int
-nat44_ed_not_translate (snat_main_t * sm, vlib_node_runtime_t *node,
- u32 sw_if_index, ip4_header_t * ip, u32 proto,
- u32 rx_fib_index, u32 thread_index)
-{
- udp_header_t *udp = ip4_next_header (ip);
- snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
- clib_bihash_kv_16_8_t kv, value;
- snat_session_key_t key0, key1;
-
- make_ed_kv (&kv, &ip->dst_address, &ip->src_address, ip->protocol,
- sm->outside_fib_index, udp->dst_port, udp->src_port);
-
- /* NAT packet aimed at external address if */
- /* has active sessions */
- if (clib_bihash_search_16_8 (&tsm->out2in_ed, &kv, &value))
- {
- key0.addr = ip->dst_address;
- key0.port = udp->dst_port;
- key0.protocol = proto;
- key0.fib_index = sm->outside_fib_index;
- /* or is static mappings */
- if (!snat_static_mapping_match(sm, key0, &key1, 1, 0, 0, 0, 0))
- return 0;
- }
- else
- return 0;
-
- if (sm->forwarding_enabled)
- return 1;
-
- return snat_not_translate_fast(sm, node, sw_if_index, ip, proto, rx_fib_index);
-}
-
-static_always_inline int
-nat_not_translate_output_feature_fwd (snat_main_t * sm, ip4_header_t * ip,
- u32 thread_index, f64 now,
- vlib_main_t * vm, vlib_buffer_t * b)
-{
- nat_ed_ses_key_t key;
- clib_bihash_kv_16_8_t kv, value;
- udp_header_t *udp;
- snat_session_t *s = 0;
- snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
-
- if (!sm->forwarding_enabled)
- return 0;
-
- if (ip->protocol == IP_PROTOCOL_ICMP)
- {
- key.as_u64[0] = key.as_u64[1] = 0;
- if (icmp_get_ed_key (ip, &key))
- return 0;
- key.fib_index = 0;
- kv.key[0] = key.as_u64[0];
- kv.key[1] = key.as_u64[1];
- }
- else if (ip->protocol == IP_PROTOCOL_UDP || ip->protocol == IP_PROTOCOL_TCP)
- {
- udp = ip4_next_header(ip);
- make_ed_kv (&kv, &ip->src_address, &ip->dst_address, ip->protocol, 0,
- udp->src_port, udp->dst_port);
- }
- else
- {
- make_ed_kv (&kv, &ip->src_address, &ip->dst_address, ip->protocol, 0, 0,
- 0);
- }
-
- if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &kv, &value))
- {
- s = pool_elt_at_index (tsm->sessions, value.value);
- if (is_fwd_bypass_session (s))
- {
- if (ip->protocol == IP_PROTOCOL_TCP)
- {
- tcp_header_t *tcp = ip4_next_header(ip);
- if (nat44_set_tcp_session_state_i2o (sm, s, tcp, thread_index))
- return 1;
- }
- /* Accounting */
- nat44_session_update_counters (s, now,
- vlib_buffer_length_in_chain (vm, b));
- return 1;
- }
- else
- return 0;
- }
-
- return 0;
-}
-
-static_always_inline int
-nat44_ed_not_translate_output_feature (snat_main_t * sm, ip4_header_t * ip,
- u8 proto, u16 src_port, u16 dst_port,
- u32 thread_index, u32 rx_sw_if_index,
- u32 tx_sw_if_index)
-{
- clib_bihash_kv_16_8_t kv, value;
- snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
- snat_interface_t *i;
- snat_session_t *s;
- u32 rx_fib_index = ip4_fib_table_get_index_for_sw_if_index (rx_sw_if_index);
- u32 tx_fib_index = ip4_fib_table_get_index_for_sw_if_index (tx_sw_if_index);
-
- /* src NAT check */
- make_ed_kv (&kv, &ip->src_address, &ip->dst_address, proto, tx_fib_index,
- src_port, dst_port);
- if (!clib_bihash_search_16_8 (&tsm->out2in_ed, &kv, &value))
- return 1;
-
- /* dst NAT check */
- make_ed_kv (&kv, &ip->dst_address, &ip->src_address, proto, rx_fib_index,
- dst_port, src_port);
- if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &kv, &value))
- {
- s = pool_elt_at_index (tsm->sessions, value.value);
- if (is_fwd_bypass_session (s))
- return 0;
-
- /* hairpinning */
- pool_foreach (i, sm->output_feature_interfaces,
- ({
- if ((nat_interface_is_inside(i)) && (rx_sw_if_index == i->sw_if_index))
- return 0;
- }));
- return 1;
- }
-
- return 0;
-}
-
-u32
-icmp_match_in2out_ed(snat_main_t *sm, vlib_node_runtime_t *node,
- u32 thread_index, vlib_buffer_t *b, ip4_header_t *ip,
- u8 *p_proto, snat_session_key_t *p_value,
- u8 *p_dont_translate, void *d, void *e)
-{
- icmp46_header_t *icmp;
- u32 sw_if_index;
- u32 rx_fib_index;
- nat_ed_ses_key_t key;
- snat_session_t *s = 0;
- u8 dont_translate = 0;
- clib_bihash_kv_16_8_t kv, value;
- u32 next = ~0;
- int err;
- snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
-
- icmp = (icmp46_header_t *) ip4_next_header (ip);
- sw_if_index = vnet_buffer(b)->sw_if_index[VLIB_RX];
- rx_fib_index = ip4_fib_table_get_index_for_sw_if_index (sw_if_index);
-
- key.as_u64[0] = key.as_u64[1] = 0;
- err = icmp_get_ed_key (ip, &key);
- if (err != 0)
- {
- b->error = node->errors[err];
- next = SNAT_IN2OUT_NEXT_DROP;
- goto out;
- }
- key.fib_index = rx_fib_index;
-
- kv.key[0] = key.as_u64[0];
- kv.key[1] = key.as_u64[1];
-
- if (clib_bihash_search_16_8 (&tsm->in2out_ed, &kv, &value))
- {
- if (vnet_buffer(b)->sw_if_index[VLIB_TX] != ~0)
- {
- if (PREDICT_FALSE(nat44_ed_not_translate_output_feature(sm, ip,
- key.proto, key.l_port, key.r_port, thread_index, sw_if_index,
- vnet_buffer(b)->sw_if_index[VLIB_TX])))
- {
- dont_translate = 1;
- goto out;
- }
- }
- else
- {
- if (PREDICT_FALSE(nat44_ed_not_translate(sm, node, sw_if_index,
- ip, SNAT_PROTOCOL_ICMP, rx_fib_index, thread_index)))
- {
- dont_translate = 1;
- goto out;
- }
- }
-
- if (PREDICT_FALSE(icmp_is_error_message (icmp)))
- {
- b->error = node->errors[SNAT_IN2OUT_ERROR_BAD_ICMP_TYPE];
- next = SNAT_IN2OUT_NEXT_DROP;
- goto out;
- }
-
- next = slow_path_ed (sm, b, rx_fib_index, &kv, &s, node, next,
- thread_index, vlib_time_now (sm->vlib_main));
-
- if (PREDICT_FALSE (next == SNAT_IN2OUT_NEXT_DROP))
- goto out;
- }
- else
- {
- if (PREDICT_FALSE(icmp->type != ICMP4_echo_request &&
- icmp->type != ICMP4_echo_reply &&
- !icmp_is_error_message (icmp)))
- {
- b->error = node->errors[SNAT_IN2OUT_ERROR_BAD_ICMP_TYPE];
- next = SNAT_IN2OUT_NEXT_DROP;
- goto out;
- }
-
- s = pool_elt_at_index (tsm->sessions, value.value);
- }
-
- *p_proto = ip_proto_to_snat_proto (key.proto);
-out:
- if (s)
- *p_value = s->out2in;
- *p_dont_translate = dont_translate;
- if (d)
- *(snat_session_t**)d = s;
- return next;
-}
-
-static inline void
-nat44_ed_hairpinning_unknown_proto (snat_main_t *sm,
- vlib_buffer_t * b,
- ip4_header_t * ip)
-{
- u32 old_addr, new_addr = 0, ti = 0;
- clib_bihash_kv_8_8_t kv, value;
- clib_bihash_kv_16_8_t s_kv, s_value;
- snat_static_mapping_t *m;
- ip_csum_t sum;
- snat_session_t *s;
- snat_main_per_thread_data_t *tsm;
-
- if (sm->num_workers > 1)
- ti = sm->worker_out2in_cb (ip, sm->outside_fib_index);
- else
- ti = sm->num_workers;
- tsm = &sm->per_thread_data[ti];
-
- old_addr = ip->dst_address.as_u32;
- make_ed_kv (&s_kv, &ip->dst_address, &ip->src_address, ip->protocol,
- sm->outside_fib_index, 0, 0);
- if (clib_bihash_search_16_8 (&tsm->out2in_ed, &s_kv, &s_value))
- {
- make_sm_kv (&kv, &ip->dst_address, 0, 0, 0);
- if (clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value))
- return;
-
- m = pool_elt_at_index (sm->static_mappings, value.value);
- if (vnet_buffer(b)->sw_if_index[VLIB_TX] == ~0)
- vnet_buffer(b)->sw_if_index[VLIB_TX] = m->fib_index;
- new_addr = ip->dst_address.as_u32 = m->local_addr.as_u32;
- }
- else
- {
- s = pool_elt_at_index (sm->per_thread_data[ti].sessions, s_value.value);
- if (vnet_buffer(b)->sw_if_index[VLIB_TX] == ~0)
- vnet_buffer(b)->sw_if_index[VLIB_TX] = s->in2out.fib_index;
- new_addr = ip->dst_address.as_u32 = s->in2out.addr.as_u32;
- }
- sum = ip->checksum;
- sum = ip_csum_update (sum, old_addr, new_addr, ip4_header_t, dst_address);
- ip->checksum = ip_csum_fold (sum);
-}
-
-static snat_session_t *
-nat44_ed_in2out_unknown_proto (snat_main_t *sm,
- vlib_buffer_t * b,
- ip4_header_t * ip,
- u32 rx_fib_index,
- u32 thread_index,
- f64 now,
- vlib_main_t * vm,
- vlib_node_runtime_t * node)
-{
- clib_bihash_kv_8_8_t kv, value;
- clib_bihash_kv_16_8_t s_kv, s_value;
- snat_static_mapping_t *m;
- u32 old_addr, new_addr = 0;
- ip_csum_t sum;
- snat_user_t *u;
- dlist_elt_t *head, *elt;
- snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
- u32 elt_index, head_index, ses_index;
- snat_session_t * s;
- u32 address_index = ~0, outside_fib_index = sm->outside_fib_index;
- int i;
- u8 is_sm = 0;
- nat_outside_fib_t *outside_fib;
- fib_node_index_t fei = FIB_NODE_INDEX_INVALID;
- fib_prefix_t pfx = {
- .fp_proto = FIB_PROTOCOL_IP4,
- .fp_len = 32,
- .fp_addr = {
- .ip4.as_u32 = ip->dst_address.as_u32,
- },
- };
-
- switch (vec_len (sm->outside_fibs))
- {
- case 0:
- outside_fib_index = sm->outside_fib_index;
- break;
- case 1:
- outside_fib_index = sm->outside_fibs[0].fib_index;
- break;
- default:
- vec_foreach (outside_fib, sm->outside_fibs)
- {
- fei = fib_table_lookup (outside_fib->fib_index, &pfx);
- if (FIB_NODE_INDEX_INVALID != fei)
- {
- if (fib_entry_get_resolving_interface (fei) != ~0)
- {
- outside_fib_index = outside_fib->fib_index;
- break;
- }
- }
- }
- break;
- }
- old_addr = ip->src_address.as_u32;
-
- make_ed_kv (&s_kv, &ip->src_address, &ip->dst_address, ip->protocol,
- rx_fib_index, 0, 0);
-
- if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &s_kv, &s_value))
- {
- s = pool_elt_at_index (tsm->sessions, s_value.value);
- new_addr = ip->src_address.as_u32 = s->out2in.addr.as_u32;
- }
- else
- {
- if (PREDICT_FALSE (maximum_sessions_exceeded(sm, thread_index)))
- {
- b->error = node->errors[SNAT_IN2OUT_ERROR_MAX_SESSIONS_EXCEEDED];
- nat_ipfix_logging_max_sessions(sm->max_translations);
- nat_log_notice ("maximum sessions exceeded");
- return 0;
- }
-
- u = nat_user_get_or_create (sm, &ip->src_address, rx_fib_index,
- thread_index);
- if (!u)
- {
- nat_log_warn ("create NAT user failed");
- return 0;
- }
-
- make_sm_kv (&kv, &ip->src_address, 0, rx_fib_index, 0);
-
- /* Try to find static mapping first */
- if (!clib_bihash_search_8_8 (&sm->static_mapping_by_local, &kv, &value))
- {
- m = pool_elt_at_index (sm->static_mappings, value.value);
- new_addr = ip->src_address.as_u32 = m->external_addr.as_u32;
- is_sm = 1;
- goto create_ses;
- }
- /* Fallback to 3-tuple key */
- else
- {
- /* Choose same out address as for TCP/UDP session to same destination */
- head_index = u->sessions_per_user_list_head_index;
- head = pool_elt_at_index (tsm->list_pool, head_index);
- elt_index = head->next;
- if (PREDICT_FALSE (elt_index == ~0))
- ses_index = ~0;
- else
- {
- elt = pool_elt_at_index (tsm->list_pool, elt_index);
- ses_index = elt->value;
- }
-
- while (ses_index != ~0)
- {
- s = pool_elt_at_index (tsm->sessions, ses_index);
- elt_index = elt->next;
- elt = pool_elt_at_index (tsm->list_pool, elt_index);
- ses_index = elt->value;
-
- if (s->ext_host_addr.as_u32 == ip->dst_address.as_u32)
- {
- new_addr = ip->src_address.as_u32 = s->out2in.addr.as_u32;
- address_index = s->outside_address_index;
-
- make_ed_kv (&s_kv, &s->out2in.addr, &ip->dst_address,
- ip->protocol, outside_fib_index, 0, 0);
- if (clib_bihash_search_16_8 (&tsm->out2in_ed, &s_kv, &s_value))
- goto create_ses;
-
- break;
- }
- }
-
- for (i = 0; i < vec_len (sm->addresses); i++)
- {
- make_ed_kv (&s_kv, &sm->addresses[i].addr, &ip->dst_address,
- ip->protocol, outside_fib_index, 0, 0);
- if (clib_bihash_search_16_8 (&tsm->out2in_ed, &s_kv, &s_value))
- {
- new_addr = ip->src_address.as_u32 =
- sm->addresses[i].addr.as_u32;
- address_index = i;
- goto create_ses;
- }
- }
- return 0;
- }
-
-create_ses:
- s = nat_ed_session_alloc (sm, u, thread_index);
- if (!s)
- {
- nat44_delete_user_with_no_session (sm, u, thread_index);
- nat_log_warn ("create NAT session failed");
- return 0;
- }
-
- s->ext_host_addr.as_u32 = ip->dst_address.as_u32;
- s->flags |= SNAT_SESSION_FLAG_UNKNOWN_PROTO;
- s->flags |= SNAT_SESSION_FLAG_ENDPOINT_DEPENDENT;
- s->outside_address_index = address_index;
- s->out2in.addr.as_u32 = new_addr;
- s->out2in.fib_index = outside_fib_index;
- s->in2out.addr.as_u32 = old_addr;
- s->in2out.fib_index = rx_fib_index;
- s->in2out.port = s->out2in.port = ip->protocol;
- if (is_sm)
- s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING;
- user_session_increment (sm, u, is_sm);
-
- /* Add to lookup tables */
- make_ed_kv (&s_kv, &s->in2out.addr, &ip->dst_address, ip->protocol,
- rx_fib_index, 0, 0);
- s_kv.value = s - tsm->sessions;
- if (clib_bihash_add_del_16_8 (&tsm->in2out_ed, &s_kv, 1))
- nat_log_notice ("in2out key add failed");
-
- make_ed_kv (&s_kv, &s->out2in.addr, &ip->dst_address, ip->protocol,
- outside_fib_index, 0, 0);
- s_kv.value = s - tsm->sessions;
- if (clib_bihash_add_del_16_8 (&tsm->out2in_ed, &s_kv, 1))
- nat_log_notice ("out2in key add failed");
- }
-
- /* Update IP checksum */
- sum = ip->checksum;
- sum = ip_csum_update (sum, old_addr, new_addr, ip4_header_t, src_address);
- ip->checksum = ip_csum_fold (sum);
-
- /* Accounting */
- nat44_session_update_counters (s, now, vlib_buffer_length_in_chain (vm, b));
-
- /* Hairpinning */
- if (vnet_buffer(b)->sw_if_index[VLIB_TX] == ~0)
- nat44_ed_hairpinning_unknown_proto(sm, b, ip);
-
- if (vnet_buffer(b)->sw_if_index[VLIB_TX] == ~0)
- vnet_buffer(b)->sw_if_index[VLIB_TX] = outside_fib_index;
-
- return s;
-}
-
-static inline uword
-nat44_ed_in2out_node_fn_inline (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame, int is_slow_path,
- int is_output_feature)
-{
- u32 n_left_from, *from, *to_next, pkts_processed = 0, stats_node_index;
- snat_in2out_next_t next_index;
- snat_main_t *sm = &snat_main;
- f64 now = vlib_time_now (vm);
- u32 thread_index = vm->thread_index;
- snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
-
- stats_node_index = is_slow_path ? nat44_ed_in2out_slowpath_node.index :
- nat44_ed_in2out_node.index;
-
- from = vlib_frame_vector_args (frame);
- n_left_from = frame->n_vectors;
- next_index = node->cached_next_index;
-
- while (n_left_from > 0)
- {
- u32 n_left_to_next;
-
- vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
-
- while (n_left_from >= 4 && n_left_to_next >= 2)
- {
- u32 bi0, bi1;
- vlib_buffer_t *b0, *b1;
- u32 next0, sw_if_index0, rx_fib_index0, iph_offset0 = 0, proto0,
- new_addr0, old_addr0;
- u32 next1, sw_if_index1, rx_fib_index1, iph_offset1 = 0, proto1,
- new_addr1, old_addr1;
- u16 old_port0, new_port0, old_port1, new_port1;
- ip4_header_t *ip0, *ip1;
- udp_header_t *udp0, *udp1;
- tcp_header_t *tcp0, *tcp1;
- icmp46_header_t *icmp0, *icmp1;
- snat_session_t *s0 = 0, *s1 = 0;
- clib_bihash_kv_16_8_t kv0, value0, kv1, value1;
- ip_csum_t sum0, sum1;
-
- /* Prefetch next iteration. */
- {
- vlib_buffer_t * p2, * p3;
-
- p2 = vlib_get_buffer (vm, from[2]);
- p3 = vlib_get_buffer (vm, from[3]);
-
- vlib_prefetch_buffer_header (p2, LOAD);
- vlib_prefetch_buffer_header (p3, LOAD);
-
- CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, STORE);
- CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, STORE);
- }
-
- /* speculatively enqueue b0 and b1 to the current next frame */
- to_next[0] = bi0 = from[0];
- to_next[1] = bi1 = from[1];
- from += 2;
- to_next += 2;
- n_left_from -= 2;
- n_left_to_next -= 2;
-
- b0 = vlib_get_buffer (vm, bi0);
- b1 = vlib_get_buffer (vm, bi1);
-
- next0 = SNAT_IN2OUT_NEXT_LOOKUP;
-
- if (is_output_feature)
- iph_offset0 = vnet_buffer (b0)->ip.save_rewrite_length;
-
- ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) +
- iph_offset0);
-
- sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
- rx_fib_index0 = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
- sw_if_index0);
-
- if (PREDICT_FALSE(ip0->ttl == 1))
- {
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
- icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
- ICMP4_time_exceeded_ttl_exceeded_in_transit,
- 0);
- next0 = SNAT_IN2OUT_NEXT_ICMP_ERROR;
- goto trace00;
- }
-
- udp0 = ip4_next_header (ip0);
- tcp0 = (tcp_header_t *) udp0;
- icmp0 = (icmp46_header_t *) udp0;
- proto0 = ip_proto_to_snat_proto (ip0->protocol);
-
- if (is_slow_path)
- {
- if (PREDICT_FALSE (proto0 == ~0))
- {
- s0 = nat44_ed_in2out_unknown_proto (sm, b0, ip0,
- rx_fib_index0,
- thread_index, now, vm,
- node);
- if (!s0)
- next0 = SNAT_IN2OUT_NEXT_DROP;
- goto trace00;
- }
-
- if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
- {
- next0 = icmp_in2out_ed_slow_path
- (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
- next0, now, thread_index, &s0);
- goto trace00;
- }
- }
- else
- {
- if (PREDICT_FALSE (proto0 == ~0))
- {
- next0 = SNAT_IN2OUT_NEXT_SLOW_PATH;
- goto trace00;
- }
-
- if (ip4_is_fragment (ip0))
- {
- next0 = SNAT_IN2OUT_NEXT_REASS;
- goto trace00;
- }
-
- if (is_output_feature)
- {
- if (PREDICT_FALSE(nat_not_translate_output_feature_fwd(
- sm, ip0, thread_index, now, vm, b0)))
- goto trace00;
- }
-
- if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
- {
- next0 = SNAT_IN2OUT_NEXT_SLOW_PATH;
- goto trace00;
- }
- }
-
- make_ed_kv (&kv0, &ip0->src_address, &ip0->dst_address, ip0->protocol,
- rx_fib_index0, udp0->src_port, udp0->dst_port);
-
- if (clib_bihash_search_16_8 (&tsm->in2out_ed, &kv0, &value0))
- {
- if (is_slow_path)
- {
- if (is_output_feature)
- {
- if (PREDICT_FALSE(nat44_ed_not_translate_output_feature(
- sm, ip0, ip0->protocol, udp0->src_port,
- udp0->dst_port, thread_index, sw_if_index0,
- vnet_buffer(b0)->sw_if_index[VLIB_TX])))
- goto trace00;
- }
- else
- {
- if (PREDICT_FALSE(nat44_ed_not_translate(sm, node,
- sw_if_index0, ip0, proto0, rx_fib_index0,
- thread_index)))
- goto trace00;
- }
-
- next0 = slow_path_ed (sm, b0, rx_fib_index0, &kv0, &s0, node,
- next0, thread_index, now);
-
- if (PREDICT_FALSE (next0 == SNAT_IN2OUT_NEXT_DROP))
- goto trace00;
- }
- else
- {
- next0 = SNAT_IN2OUT_NEXT_SLOW_PATH;
- goto trace00;
- }
- }
- else
- {
- s0 = pool_elt_at_index (tsm->sessions, value0.value);
- }
-
- b0->flags |= VNET_BUFFER_F_IS_NATED;
-
- if (!is_output_feature)
- vnet_buffer(b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index;
-
- old_addr0 = ip0->src_address.as_u32;
- new_addr0 = ip0->src_address.as_u32 = s0->out2in.addr.as_u32;
- sum0 = ip0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
- src_address);
- if (PREDICT_FALSE (is_twice_nat_session (s0)))
- sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32,
- s0->ext_host_addr.as_u32, ip4_header_t,
- dst_address);
- ip0->checksum = ip_csum_fold (sum0);
-
- if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
- {
- old_port0 = tcp0->src_port;
- new_port0 = tcp0->src_port = s0->out2in.port;
-
- sum0 = tcp0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
- dst_address);
- sum0 = ip_csum_update (sum0, old_port0, new_port0, ip4_header_t,
- length);
- if (PREDICT_FALSE (is_twice_nat_session (s0)))
- {
- sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32,
- s0->ext_host_addr.as_u32,
- ip4_header_t, dst_address);
- sum0 = ip_csum_update (sum0, tcp0->dst_port,
- s0->ext_host_port, ip4_header_t,
- length);
- tcp0->dst_port = s0->ext_host_port;
- ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
- }
- mss_clamping (sm, tcp0, &sum0);
- tcp0->checksum = ip_csum_fold(sum0);
- if (nat44_set_tcp_session_state_i2o (sm, s0, tcp0, thread_index))
- goto trace00;
- }
- else
- {
- udp0->src_port = s0->out2in.port;
- udp0->checksum = 0;
- if (PREDICT_FALSE (is_twice_nat_session (s0)))
- {
- udp0->dst_port = s0->ext_host_port;
- ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
- }
- }
-
- /* Accounting */
- nat44_session_update_counters (s0, now,
- vlib_buffer_length_in_chain (vm, b0));
-
- trace00:
- if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b0->flags & VLIB_BUFFER_IS_TRACED)))
- {
- snat_in2out_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->is_slow_path = is_slow_path;
- t->sw_if_index = sw_if_index0;
- t->next_index = next0;
- t->session_index = ~0;
- if (s0)
- t->session_index = s0 - tsm->sessions;
- }
-
- pkts_processed += next0 != SNAT_IN2OUT_NEXT_DROP;
-
-
- next1 = SNAT_IN2OUT_NEXT_LOOKUP;
-
- if (is_output_feature)
- iph_offset1 = vnet_buffer (b1)->ip.save_rewrite_length;
-
- ip1 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b1) +
- iph_offset1);
-
- sw_if_index1 = vnet_buffer(b1)->sw_if_index[VLIB_RX];
- rx_fib_index1 = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
- sw_if_index1);
-
- if (PREDICT_FALSE(ip1->ttl == 1))
- {
- vnet_buffer (b1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
- icmp4_error_set_vnet_buffer (b1, ICMP4_time_exceeded,
- ICMP4_time_exceeded_ttl_exceeded_in_transit,
- 0);
- next1 = SNAT_IN2OUT_NEXT_ICMP_ERROR;
- goto trace01;
- }
-
- udp1 = ip4_next_header (ip1);
- tcp1 = (tcp_header_t *) udp1;
- icmp1 = (icmp46_header_t *) udp1;
- proto1 = ip_proto_to_snat_proto (ip1->protocol);
-
- if (is_slow_path)
- {
- if (PREDICT_FALSE (proto1 == ~0))
- {
- s1 = nat44_ed_in2out_unknown_proto (sm, b1, ip1,
- rx_fib_index1,
- thread_index, now, vm,
- node);
- if (!s1)
- next1 = SNAT_IN2OUT_NEXT_DROP;
- goto trace01;
- }
-
- if (PREDICT_FALSE (proto1 == SNAT_PROTOCOL_ICMP))
- {
- next1 = icmp_in2out_ed_slow_path
- (sm, b1, ip1, icmp1, sw_if_index1, rx_fib_index1, node,
- next1, now, thread_index, &s1);
- goto trace01;
- }
- }
- else
- {
- if (PREDICT_FALSE (proto1 == ~0))
- {
- next1 = SNAT_IN2OUT_NEXT_SLOW_PATH;
- goto trace01;
- }
-
- if (ip4_is_fragment (ip1))
- {
- next1 = SNAT_IN2OUT_NEXT_REASS;
- goto trace01;
- }
-
- if (is_output_feature)
- {
- if (PREDICT_FALSE(nat_not_translate_output_feature_fwd(
- sm, ip1, thread_index, now, vm, b1)))
- goto trace01;
- }
-
- if (PREDICT_FALSE (proto1 == SNAT_PROTOCOL_ICMP))
- {
- next1 = SNAT_IN2OUT_NEXT_SLOW_PATH;
- goto trace01;
- }
- }
-
- make_ed_kv (&kv1, &ip1->src_address, &ip1->dst_address, ip1->protocol,
- rx_fib_index1, udp1->src_port, udp1->dst_port);
-
- if (clib_bihash_search_16_8 (&tsm->in2out_ed, &kv1, &value1))
- {
- if (is_slow_path)
- {
- if (is_output_feature)
- {
- if (PREDICT_FALSE(nat44_ed_not_translate_output_feature(
- sm, ip1, ip1->protocol, udp1->src_port,
- udp1->dst_port, thread_index, sw_if_index1,
- vnet_buffer(b1)->sw_if_index[VLIB_TX])))
- goto trace01;
- }
- else
- {
- if (PREDICT_FALSE(nat44_ed_not_translate(sm, node,
- sw_if_index1, ip1, proto1, rx_fib_index1,
- thread_index)))
- goto trace01;
- }
-
- next1 = slow_path_ed (sm, b1, rx_fib_index1, &kv1, &s1, node,
- next1, thread_index, now);
-
- if (PREDICT_FALSE (next1 == SNAT_IN2OUT_NEXT_DROP))
- goto trace01;
- }
- else
- {
- next1 = SNAT_IN2OUT_NEXT_SLOW_PATH;
- goto trace01;
- }
- }
- else
- {
- s1 = pool_elt_at_index (tsm->sessions, value1.value);
- }
-
- b1->flags |= VNET_BUFFER_F_IS_NATED;
-
- if (!is_output_feature)
- vnet_buffer(b1)->sw_if_index[VLIB_TX] = s1->out2in.fib_index;
-
- old_addr1 = ip1->src_address.as_u32;
- new_addr1 = ip1->src_address.as_u32 = s1->out2in.addr.as_u32;
- sum1 = ip1->checksum;
- sum1 = ip_csum_update (sum1, old_addr1, new_addr1, ip4_header_t,
- src_address);
- if (PREDICT_FALSE (is_twice_nat_session (s1)))
- sum1 = ip_csum_update (sum1, ip1->dst_address.as_u32,
- s1->ext_host_addr.as_u32, ip4_header_t,
- dst_address);
- ip1->checksum = ip_csum_fold (sum1);
-
- if (PREDICT_TRUE (proto1 == SNAT_PROTOCOL_TCP))
- {
- old_port1 = tcp1->src_port;
- new_port1 = tcp1->src_port = s1->out2in.port;
-
- sum1 = tcp1->checksum;
- sum1 = ip_csum_update (sum1, old_addr1, new_addr1, ip4_header_t,
- dst_address);
- sum1 = ip_csum_update (sum1, old_port1, new_port1, ip4_header_t,
- length);
- if (PREDICT_FALSE (is_twice_nat_session (s1)))
- {
- sum1 = ip_csum_update (sum1, ip1->dst_address.as_u32,
- s1->ext_host_addr.as_u32,
- ip4_header_t, dst_address);
- sum1 = ip_csum_update (sum1, tcp1->dst_port,
- s1->ext_host_port, ip4_header_t,
- length);
- tcp1->dst_port = s1->ext_host_port;
- ip1->dst_address.as_u32 = s1->ext_host_addr.as_u32;
- }
- tcp1->checksum = ip_csum_fold(sum1);
- mss_clamping (sm, tcp1, &sum1);
- if (nat44_set_tcp_session_state_i2o (sm, s1, tcp1, thread_index))
- goto trace01;
- }
- else
- {
- udp1->src_port = s1->out2in.port;
- udp1->checksum = 0;
- if (PREDICT_FALSE (is_twice_nat_session (s1)))
- {
- udp1->dst_port = s1->ext_host_port;
- ip1->dst_address.as_u32 = s1->ext_host_addr.as_u32;
- }
- }
-
- /* Accounting */
- nat44_session_update_counters (s1, now,
- vlib_buffer_length_in_chain (vm, b1));
-
- trace01:
- if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b1->flags & VLIB_BUFFER_IS_TRACED)))
- {
- snat_in2out_trace_t *t =
- vlib_add_trace (vm, node, b1, sizeof (*t));
- t->is_slow_path = is_slow_path;
- t->sw_if_index = sw_if_index1;
- t->next_index = next1;
- t->session_index = ~0;
- if (s1)
- t->session_index = s1 - tsm->sessions;
- }
-
- pkts_processed += next1 != SNAT_IN2OUT_NEXT_DROP;
-
- /* verify speculative enqueues, maybe switch current next frame */
- vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
- to_next, n_left_to_next,
- bi0, bi1, next0, next1);
- }
-
- while (n_left_from > 0 && n_left_to_next > 0)
- {
- u32 bi0;
- vlib_buffer_t *b0;
- u32 next0, sw_if_index0, rx_fib_index0, iph_offset0 = 0, proto0,
- new_addr0, old_addr0;
- u16 old_port0, new_port0;
- ip4_header_t *ip0;
- udp_header_t *udp0;
- tcp_header_t *tcp0;
- icmp46_header_t * icmp0;
- snat_session_t *s0 = 0;
- clib_bihash_kv_16_8_t kv0, value0;
- ip_csum_t sum0;
-
- /* speculatively enqueue b0 to the current next frame */
- bi0 = from[0];
- to_next[0] = bi0;
- from += 1;
- to_next += 1;
- n_left_from -= 1;
- n_left_to_next -= 1;
-
- b0 = vlib_get_buffer (vm, bi0);
- next0 = SNAT_IN2OUT_NEXT_LOOKUP;
-
- if (is_output_feature)
- iph_offset0 = vnet_buffer (b0)->ip.save_rewrite_length;
-
- ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) +
- iph_offset0);
-
- sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
- rx_fib_index0 = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
- sw_if_index0);
-
- if (PREDICT_FALSE(ip0->ttl == 1))
- {
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
- icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
- ICMP4_time_exceeded_ttl_exceeded_in_transit,
- 0);
- next0 = SNAT_IN2OUT_NEXT_ICMP_ERROR;
- goto trace0;
- }
-
- udp0 = ip4_next_header (ip0);
- tcp0 = (tcp_header_t *) udp0;
- icmp0 = (icmp46_header_t *) udp0;
- proto0 = ip_proto_to_snat_proto (ip0->protocol);
-
- if (is_slow_path)
- {
- if (PREDICT_FALSE (proto0 == ~0))
- {
- s0 = nat44_ed_in2out_unknown_proto (sm, b0, ip0,
- rx_fib_index0,
- thread_index, now, vm,
- node);
- if (!s0)
- next0 = SNAT_IN2OUT_NEXT_DROP;
- goto trace0;
- }
-
- if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
- {
- next0 = icmp_in2out_ed_slow_path
- (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
- next0, now, thread_index, &s0);
- goto trace0;
- }
- }
- else
- {
- if (PREDICT_FALSE (proto0 == ~0))
- {
- next0 = SNAT_IN2OUT_NEXT_SLOW_PATH;
- goto trace0;
- }
-
- if (ip4_is_fragment (ip0))
- {
- next0 = SNAT_IN2OUT_NEXT_REASS;
- goto trace0;
- }
-
- if (is_output_feature)
- {
- if (PREDICT_FALSE(nat_not_translate_output_feature_fwd(
- sm, ip0, thread_index, now, vm, b0)))
- goto trace0;
- }
-
- if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
- {
- next0 = SNAT_IN2OUT_NEXT_SLOW_PATH;
- goto trace0;
- }
- }
-
- make_ed_kv (&kv0, &ip0->src_address, &ip0->dst_address, ip0->protocol,
- rx_fib_index0, udp0->src_port, udp0->dst_port);
-
- if (clib_bihash_search_16_8 (&tsm->in2out_ed, &kv0, &value0))
- {
- if (is_slow_path)
- {
- if (is_output_feature)
- {
- if (PREDICT_FALSE(nat44_ed_not_translate_output_feature(
- sm, ip0, ip0->protocol, udp0->src_port,
- udp0->dst_port, thread_index, sw_if_index0,
- vnet_buffer(b0)->sw_if_index[VLIB_TX])))
- goto trace0;
- }
- else
- {
- if (PREDICT_FALSE(nat44_ed_not_translate(sm, node,
- sw_if_index0, ip0, proto0, rx_fib_index0,
- thread_index)))
- goto trace0;
- }
-
- next0 = slow_path_ed (sm, b0, rx_fib_index0, &kv0, &s0, node,
- next0, thread_index, now);
-
- if (PREDICT_FALSE (next0 == SNAT_IN2OUT_NEXT_DROP))
- goto trace0;
- }
- else
- {
- next0 = SNAT_IN2OUT_NEXT_SLOW_PATH;
- goto trace0;
- }
- }
- else
- {
- s0 = pool_elt_at_index (tsm->sessions, value0.value);
- }
-
- b0->flags |= VNET_BUFFER_F_IS_NATED;
-
- if (!is_output_feature)
- vnet_buffer(b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index;
-
- old_addr0 = ip0->src_address.as_u32;
- new_addr0 = ip0->src_address.as_u32 = s0->out2in.addr.as_u32;
- sum0 = ip0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
- src_address);
- if (PREDICT_FALSE (is_twice_nat_session (s0)))
- sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32,
- s0->ext_host_addr.as_u32, ip4_header_t,
- dst_address);
- ip0->checksum = ip_csum_fold (sum0);
-
- if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
- {
- old_port0 = tcp0->src_port;
- new_port0 = tcp0->src_port = s0->out2in.port;
-
- sum0 = tcp0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
- dst_address);
- sum0 = ip_csum_update (sum0, old_port0, new_port0, ip4_header_t,
- length);
- if (PREDICT_FALSE (is_twice_nat_session (s0)))
- {
- sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32,
- s0->ext_host_addr.as_u32,
- ip4_header_t, dst_address);
- sum0 = ip_csum_update (sum0, tcp0->dst_port,
- s0->ext_host_port, ip4_header_t,
- length);
- tcp0->dst_port = s0->ext_host_port;
- ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
- }
- mss_clamping (sm, tcp0, &sum0);
- tcp0->checksum = ip_csum_fold(sum0);
- if (nat44_set_tcp_session_state_i2o (sm, s0, tcp0, thread_index))
- goto trace0;
- }
- else
- {
- udp0->src_port = s0->out2in.port;
- udp0->checksum = 0;
- if (PREDICT_FALSE (is_twice_nat_session (s0)))
- {
- udp0->dst_port = s0->ext_host_port;
- ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
- }
- }
-
- /* Accounting */
- nat44_session_update_counters (s0, now,
- vlib_buffer_length_in_chain (vm, b0));
-
- trace0:
- if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b0->flags & VLIB_BUFFER_IS_TRACED)))
- {
- snat_in2out_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->is_slow_path = is_slow_path;
- t->sw_if_index = sw_if_index0;
- t->next_index = next0;
- t->session_index = ~0;
- if (s0)
- t->session_index = s0 - tsm->sessions;
- }
-
- pkts_processed += next0 != SNAT_IN2OUT_NEXT_DROP;
-
- /* verify speculative enqueue, maybe switch current next frame */
- vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
- to_next, n_left_to_next,
- bi0, next0);
- }
-
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
- }
-
- vlib_node_increment_counter (vm, stats_node_index,
- SNAT_IN2OUT_ERROR_IN2OUT_PACKETS,
- pkts_processed);
- return frame->n_vectors;
-}
-
-static uword
-nat44_ed_in2out_fast_path_fn (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- return nat44_ed_in2out_node_fn_inline (vm, node, frame, 0, 0);
-}
-
-VLIB_REGISTER_NODE (nat44_ed_in2out_node) = {
- .function = nat44_ed_in2out_fast_path_fn,
- .name = "nat44-ed-in2out",
- .vector_size = sizeof (u32),
- .format_trace = format_snat_in2out_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
-
- .n_errors = ARRAY_LEN(snat_in2out_error_strings),
- .error_strings = snat_in2out_error_strings,
-
- .runtime_data_bytes = sizeof (snat_runtime_t),
-
- .n_next_nodes = SNAT_IN2OUT_N_NEXT,
-
- /* edit / add dispositions here */
- .next_nodes = {
- [SNAT_IN2OUT_NEXT_DROP] = "error-drop",
- [SNAT_IN2OUT_NEXT_LOOKUP] = "ip4-lookup",
- [SNAT_IN2OUT_NEXT_SLOW_PATH] = "nat44-ed-in2out-slowpath",
- [SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
- [SNAT_IN2OUT_NEXT_REASS] = "nat44-ed-in2out-reass",
- },
-};
-
-VLIB_NODE_FUNCTION_MULTIARCH (nat44_ed_in2out_node, nat44_ed_in2out_fast_path_fn);
-
-static uword
-nat44_ed_in2out_output_fast_path_fn (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- return nat44_ed_in2out_node_fn_inline (vm, node, frame, 0, 1);
-}
-
-VLIB_REGISTER_NODE (nat44_ed_in2out_output_node) = {
- .function = nat44_ed_in2out_output_fast_path_fn,
- .name = "nat44-ed-in2out-output",
- .vector_size = sizeof (u32),
- .format_trace = format_snat_in2out_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
-
- .n_errors = ARRAY_LEN(snat_in2out_error_strings),
- .error_strings = snat_in2out_error_strings,
-
- .runtime_data_bytes = sizeof (snat_runtime_t),
-
- .n_next_nodes = SNAT_IN2OUT_N_NEXT,
-
- /* edit / add dispositions here */
- .next_nodes = {
- [SNAT_IN2OUT_NEXT_DROP] = "error-drop",
- [SNAT_IN2OUT_NEXT_LOOKUP] = "interface-output",
- [SNAT_IN2OUT_NEXT_SLOW_PATH] = "nat44-ed-in2out-output-slowpath",
- [SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
- [SNAT_IN2OUT_NEXT_REASS] = "nat44-ed-in2out-reass-output",
- },
-};
-
-VLIB_NODE_FUNCTION_MULTIARCH (nat44_ed_in2out_output_node,
- nat44_ed_in2out_output_fast_path_fn);
-
-static uword
-nat44_ed_in2out_slow_path_fn (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- return nat44_ed_in2out_node_fn_inline (vm, node, frame, 1, 0);
-}
-
-VLIB_REGISTER_NODE (nat44_ed_in2out_slowpath_node) = {
- .function = nat44_ed_in2out_slow_path_fn,
- .name = "nat44-ed-in2out-slowpath",
- .vector_size = sizeof (u32),
- .format_trace = format_snat_in2out_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
-
- .n_errors = ARRAY_LEN(snat_in2out_error_strings),
- .error_strings = snat_in2out_error_strings,
-
- .runtime_data_bytes = sizeof (snat_runtime_t),
-
- .n_next_nodes = SNAT_IN2OUT_N_NEXT,
-
- /* edit / add dispositions here */
- .next_nodes = {
- [SNAT_IN2OUT_NEXT_DROP] = "error-drop",
- [SNAT_IN2OUT_NEXT_LOOKUP] = "ip4-lookup",
- [SNAT_IN2OUT_NEXT_SLOW_PATH] = "nat44-ed-in2out-slowpath",
- [SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
- [SNAT_IN2OUT_NEXT_REASS] = "nat44-ed-in2out-reass",
- },
-};
-
-VLIB_NODE_FUNCTION_MULTIARCH (nat44_ed_in2out_slowpath_node,
- nat44_ed_in2out_slow_path_fn);
-
-static uword
-nat44_ed_in2out_output_slow_path_fn (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- return nat44_ed_in2out_node_fn_inline (vm, node, frame, 1, 1);
-}
-
-VLIB_REGISTER_NODE (nat44_ed_in2out_output_slowpath_node) = {
- .function = nat44_ed_in2out_output_slow_path_fn,
- .name = "nat44-ed-in2out-output-slowpath",
- .vector_size = sizeof (u32),
- .format_trace = format_snat_in2out_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
-
- .n_errors = ARRAY_LEN(snat_in2out_error_strings),
- .error_strings = snat_in2out_error_strings,
-
- .runtime_data_bytes = sizeof (snat_runtime_t),
-
- .n_next_nodes = SNAT_IN2OUT_N_NEXT,
-
- /* edit / add dispositions here */
- .next_nodes = {
- [SNAT_IN2OUT_NEXT_DROP] = "error-drop",
- [SNAT_IN2OUT_NEXT_LOOKUP] = "interface-output",
- [SNAT_IN2OUT_NEXT_SLOW_PATH] = "nat44-ed-in2out-output-slowpath",
- [SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
- [SNAT_IN2OUT_NEXT_REASS] = "nat44-ed-in2out-reass",
- },
-};
-
-VLIB_NODE_FUNCTION_MULTIARCH (nat44_ed_in2out_output_slowpath_node,
- nat44_ed_in2out_output_slow_path_fn);
-
-static inline uword
-nat44_ed_in2out_reass_node_fn_inline (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame,
- int is_output_feature)
-{
- u32 n_left_from, *from, *to_next;
- snat_in2out_next_t next_index;
- u32 pkts_processed = 0;
- snat_main_t *sm = &snat_main;
- f64 now = vlib_time_now (vm);
- u32 thread_index = vm->thread_index;
- snat_main_per_thread_data_t *per_thread_data =
- &sm->per_thread_data[thread_index];
- u32 *fragments_to_drop = 0;
- u32 *fragments_to_loopback = 0;
-
- from = vlib_frame_vector_args (frame);
- n_left_from = frame->n_vectors;
- next_index = node->cached_next_index;
-
- while (n_left_from > 0)
- {
- u32 n_left_to_next;
-
- vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
-
- while (n_left_from > 0 && n_left_to_next > 0)
- {
- u32 bi0, sw_if_index0, proto0, rx_fib_index0, new_addr0, old_addr0;
- u32 iph_offset0 = 0;
- vlib_buffer_t *b0;
- u32 next0;
- u8 cached0 = 0;
- ip4_header_t *ip0 = 0;
- nat_reass_ip4_t *reass0;
- udp_header_t * udp0;
- tcp_header_t * tcp0;
- icmp46_header_t * icmp0;
- clib_bihash_kv_16_8_t kv0, value0;
- snat_session_t * s0 = 0;
- u16 old_port0, new_port0;
- ip_csum_t sum0;
-
- /* speculatively enqueue b0 to the current next frame */
- bi0 = from[0];
- to_next[0] = bi0;
- from += 1;
- to_next += 1;
- n_left_from -= 1;
- n_left_to_next -= 1;
-
- b0 = vlib_get_buffer (vm, bi0);
-
- next0 = SNAT_IN2OUT_NEXT_LOOKUP;
-
- sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
- rx_fib_index0 = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
- sw_if_index0);
-
- if (PREDICT_FALSE (nat_reass_is_drop_frag(0)))
- {
- next0 = SNAT_IN2OUT_NEXT_DROP;
- b0->error = node->errors[SNAT_IN2OUT_ERROR_DROP_FRAGMENT];
- goto trace0;
- }
-
- if (is_output_feature)
- iph_offset0 = vnet_buffer (b0)->ip.save_rewrite_length;
-
- ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) +
- iph_offset0);
-
- udp0 = ip4_next_header (ip0);
- tcp0 = (tcp_header_t *) udp0;
- icmp0 = (icmp46_header_t *) udp0;
- proto0 = ip_proto_to_snat_proto (ip0->protocol);
-
- reass0 = nat_ip4_reass_find_or_create (ip0->src_address,
- ip0->dst_address,
- ip0->fragment_id,
- ip0->protocol,
- 1,
- &fragments_to_drop);
-
- if (PREDICT_FALSE (!reass0))
- {
- next0 = SNAT_IN2OUT_NEXT_DROP;
- b0->error = node->errors[SNAT_IN2OUT_ERROR_MAX_REASS];
- nat_log_notice ("maximum reassemblies exceeded");
- goto trace0;
- }
-
- if (PREDICT_FALSE (ip4_is_first_fragment (ip0)))
- {
- if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
- {
- if (is_output_feature)
- {
- if (PREDICT_FALSE(nat_not_translate_output_feature_fwd(
- sm, ip0, thread_index, now, vm, b0)))
- reass0->flags |= NAT_REASS_FLAG_ED_DONT_TRANSLATE;
- goto trace0;
- }
-
- next0 = icmp_in2out_slow_path
- (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
- next0, now, thread_index, &s0);
-
- if (PREDICT_TRUE(next0 != SNAT_IN2OUT_NEXT_DROP))
- {
- if (s0)
- reass0->sess_index = s0 - per_thread_data->sessions;
- else
- reass0->flags |= NAT_REASS_FLAG_ED_DONT_TRANSLATE;
- nat_ip4_reass_get_frags (reass0, &fragments_to_loopback);
- }
-
- goto trace0;
- }
-
- make_ed_kv (&kv0, &ip0->src_address, &ip0->dst_address, ip0->protocol,
- rx_fib_index0, udp0->src_port, udp0->dst_port);
-
- if (clib_bihash_search_16_8 (&per_thread_data->in2out_ed, &kv0, &value0))
- {
- if (is_output_feature)
- {
- if (PREDICT_FALSE(nat44_ed_not_translate_output_feature(
- sm, ip0, ip0->protocol, udp0->src_port,
- udp0->dst_port, thread_index, sw_if_index0,
- vnet_buffer(b0)->sw_if_index[VLIB_TX])))
- {
- reass0->flags |= NAT_REASS_FLAG_ED_DONT_TRANSLATE;
- nat_ip4_reass_get_frags (reass0, &fragments_to_loopback);
- goto trace0;
- }
- }
- else
- {
- if (PREDICT_FALSE(nat44_ed_not_translate(sm, node,
- sw_if_index0, ip0, proto0, rx_fib_index0,
- thread_index)))
- {
- reass0->flags |= NAT_REASS_FLAG_ED_DONT_TRANSLATE;
- nat_ip4_reass_get_frags (reass0, &fragments_to_loopback);
- goto trace0;
- }
- }
-
- next0 = slow_path_ed (sm, b0, rx_fib_index0, &kv0,
- &s0, node, next0, thread_index, now);
-
- if (PREDICT_FALSE (next0 == SNAT_IN2OUT_NEXT_DROP))
- goto trace0;
-
- reass0->sess_index = s0 - per_thread_data->sessions;
- }
- else
- {
- s0 = pool_elt_at_index (per_thread_data->sessions,
- value0.value);
- reass0->sess_index = value0.value;
- }
- nat_ip4_reass_get_frags (reass0, &fragments_to_loopback);
- }
- else
- {
- if (reass0->flags & NAT_REASS_FLAG_ED_DONT_TRANSLATE)
- goto trace0;
- if (PREDICT_FALSE (reass0->sess_index == (u32) ~0))
- {
- if (nat_ip4_reass_add_fragment (reass0, bi0, &fragments_to_drop))
- {
- b0->error = node->errors[SNAT_IN2OUT_ERROR_MAX_FRAG];
- nat_log_notice ("maximum fragments per reassembly exceeded");
- next0 = SNAT_IN2OUT_NEXT_DROP;
- goto trace0;
- }
- cached0 = 1;
- goto trace0;
- }
- s0 = pool_elt_at_index (per_thread_data->sessions,
- reass0->sess_index);
- }
-
- old_addr0 = ip0->src_address.as_u32;
- ip0->src_address = s0->out2in.addr;
- new_addr0 = ip0->src_address.as_u32;
- if (!is_output_feature)
- vnet_buffer(b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index;
-
- sum0 = ip0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
- ip4_header_t,
- src_address /* changed member */);
- if (PREDICT_FALSE (is_twice_nat_session (s0)))
- sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32,
- s0->ext_host_addr.as_u32, ip4_header_t,
- dst_address);
- ip0->checksum = ip_csum_fold (sum0);
-
- if (PREDICT_FALSE (ip4_is_first_fragment (ip0)))
- {
- if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP))
- {
- old_port0 = tcp0->src_port;
- tcp0->src_port = s0->out2in.port;
- new_port0 = tcp0->src_port;
-
- sum0 = tcp0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
- ip4_header_t,
- dst_address /* changed member */);
- sum0 = ip_csum_update (sum0, old_port0, new_port0,
- ip4_header_t /* cheat */,
- length /* changed member */);
- if (PREDICT_FALSE (is_twice_nat_session (s0)))
- {
- sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32,
- s0->ext_host_addr.as_u32,
- ip4_header_t, dst_address);
- sum0 = ip_csum_update (sum0, tcp0->dst_port,
- s0->ext_host_port, ip4_header_t,
- length);
- tcp0->dst_port = s0->ext_host_port;
- ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
- }
- tcp0->checksum = ip_csum_fold(sum0);
- }
- else
- {
- old_port0 = udp0->src_port;
- udp0->src_port = s0->out2in.port;
- udp0->checksum = 0;
- if (PREDICT_FALSE (is_twice_nat_session (s0)))
- {
- udp0->dst_port = s0->ext_host_port;
- ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
- }
- }
- }
-
- /* Hairpinning */
- if (PREDICT_TRUE(proto0 != SNAT_PROTOCOL_ICMP))
- nat44_reass_hairpinning (sm, b0, ip0, s0->out2in.port,
- s0->ext_host_port, proto0, 1);
- else
- snat_icmp_hairpinning(sm, b0, ip0, icmp0, 1);
-
- /* Accounting */
- nat44_session_update_counters (s0, now,
- vlib_buffer_length_in_chain (vm, b0));
- /* Per-user LRU list maintenance */
- nat44_session_update_lru (sm, s0, thread_index);
-
- trace0:
- if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b0->flags & VLIB_BUFFER_IS_TRACED)))
- {
- nat44_in2out_reass_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->cached = cached0;
- t->sw_if_index = sw_if_index0;
- t->next_index = next0;
- }
-
- if (cached0)
- {
- n_left_to_next++;
- to_next--;
- }
- else
- {
- pkts_processed += next0 != SNAT_IN2OUT_NEXT_DROP;
-
- /* verify speculative enqueue, maybe switch current next frame */
- vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
- to_next, n_left_to_next,
- bi0, next0);
- }
-
- if (n_left_from == 0 && vec_len (fragments_to_loopback))
- {
- from = vlib_frame_vector_args (frame);
- u32 len = vec_len (fragments_to_loopback);
- if (len <= VLIB_FRAME_SIZE)
- {
- clib_memcpy (from, fragments_to_loopback, sizeof (u32) * len);
- n_left_from = len;
- vec_reset_length (fragments_to_loopback);
- }
- else
- {
- clib_memcpy (from,
- fragments_to_loopback + (len - VLIB_FRAME_SIZE),
- sizeof (u32) * VLIB_FRAME_SIZE);
- n_left_from = VLIB_FRAME_SIZE;
- _vec_len (fragments_to_loopback) = len - VLIB_FRAME_SIZE;
- }
- }
- }
-
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
- }
-
- vlib_node_increment_counter (vm, nat44_in2out_reass_node.index,
- SNAT_IN2OUT_ERROR_IN2OUT_PACKETS,
- pkts_processed);
-
- nat_send_all_to_node (vm, fragments_to_drop, node,
- &node->errors[SNAT_IN2OUT_ERROR_DROP_FRAGMENT],
- SNAT_IN2OUT_NEXT_DROP);
-
- vec_free (fragments_to_drop);
- vec_free (fragments_to_loopback);
- return frame->n_vectors;
-}
-
-static uword
-nat44_ed_in2out_reass_node_fn (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- return nat44_ed_in2out_reass_node_fn_inline (vm, node, frame, 0);
-}
-
-VLIB_REGISTER_NODE (nat44_ed_in2out_reass_node) = {
- .function = nat44_ed_in2out_reass_node_fn,
- .name = "nat44-ed-in2out-reass",
- .vector_size = sizeof (u32),
- .format_trace = format_nat44_in2out_reass_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
-
- .n_errors = ARRAY_LEN(snat_in2out_error_strings),
- .error_strings = snat_in2out_error_strings,
-
- .n_next_nodes = SNAT_IN2OUT_N_NEXT,
- .next_nodes = {
- [SNAT_IN2OUT_NEXT_DROP] = "error-drop",
- [SNAT_IN2OUT_NEXT_LOOKUP] = "ip4-lookup",
- [SNAT_IN2OUT_NEXT_SLOW_PATH] = "nat44-in2out-slowpath",
- [SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
- [SNAT_IN2OUT_NEXT_REASS] = "nat44-ed-in2out-reass",
- },
-};
-
-VLIB_NODE_FUNCTION_MULTIARCH (nat44_ed_in2out_reass_node,
- nat44_ed_in2out_reass_node_fn);
-
-static uword
-nat44_ed_in2out_reass_output_node_fn (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- return nat44_ed_in2out_reass_node_fn_inline (vm, node, frame, 1);
-}
-
-VLIB_REGISTER_NODE (nat44_ed_in2out_reass_output_node) = {
- .function = nat44_ed_in2out_reass_output_node_fn,
- .name = "nat44-ed-in2out-reass-output",
- .vector_size = sizeof (u32),
- .format_trace = format_nat44_in2out_reass_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
-
- .n_errors = ARRAY_LEN(snat_in2out_error_strings),
- .error_strings = snat_in2out_error_strings,
-
- .n_next_nodes = SNAT_IN2OUT_N_NEXT,
- .next_nodes = {
- [SNAT_IN2OUT_NEXT_DROP] = "error-drop",
- [SNAT_IN2OUT_NEXT_LOOKUP] = "interface-output",
- [SNAT_IN2OUT_NEXT_SLOW_PATH] = "nat44-in2out-slowpath",
- [SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
- [SNAT_IN2OUT_NEXT_REASS] = "nat44-ed-in2out-reass",
- },
-};
-
-VLIB_NODE_FUNCTION_MULTIARCH (nat44_ed_in2out_reass_output_node,
- nat44_ed_in2out_reass_output_node_fn);
-
-/**************************/
-/*** deterministic mode ***/
-/**************************/
-static uword
-snat_det_in2out_node_fn (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- u32 n_left_from, * from, * to_next;
- snat_in2out_next_t next_index;
- u32 pkts_processed = 0;
- snat_main_t * sm = &snat_main;
- u32 now = (u32) vlib_time_now (vm);
- u32 thread_index = vm->thread_index;
-
- from = vlib_frame_vector_args (frame);
- n_left_from = frame->n_vectors;
- next_index = node->cached_next_index;
-
- while (n_left_from > 0)
- {
- u32 n_left_to_next;
-
- vlib_get_next_frame (vm, node, next_index,
- to_next, n_left_to_next);
-
- while (n_left_from >= 4 && n_left_to_next >= 2)
- {
- u32 bi0, bi1;
- vlib_buffer_t * b0, * b1;
- u32 next0, next1;
- u32 sw_if_index0, sw_if_index1;
- ip4_header_t * ip0, * ip1;
- ip_csum_t sum0, sum1;
- ip4_address_t new_addr0, old_addr0, new_addr1, old_addr1;
- u16 old_port0, new_port0, lo_port0, i0;
- u16 old_port1, new_port1, lo_port1, i1;
- udp_header_t * udp0, * udp1;
- tcp_header_t * tcp0, * tcp1;
- u32 proto0, proto1;
- snat_det_out_key_t key0, key1;
- snat_det_map_t * dm0, * dm1;
- snat_det_session_t * ses0 = 0, * ses1 = 0;
- u32 rx_fib_index0, rx_fib_index1;
- icmp46_header_t * icmp0, * icmp1;
-
- /* Prefetch next iteration. */
- {
- vlib_buffer_t * p2, * p3;
-
- p2 = vlib_get_buffer (vm, from[2]);
- p3 = vlib_get_buffer (vm, from[3]);
-
- vlib_prefetch_buffer_header (p2, LOAD);
- vlib_prefetch_buffer_header (p3, LOAD);
-
- CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, STORE);
- CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, STORE);
- }
-
- /* speculatively enqueue b0 and b1 to the current next frame */
- to_next[0] = bi0 = from[0];
- to_next[1] = bi1 = from[1];
- from += 2;
- to_next += 2;
- n_left_from -= 2;
- n_left_to_next -= 2;
-
- b0 = vlib_get_buffer (vm, bi0);
- b1 = vlib_get_buffer (vm, bi1);
-
- next0 = SNAT_IN2OUT_NEXT_LOOKUP;
- next1 = SNAT_IN2OUT_NEXT_LOOKUP;
-
- ip0 = vlib_buffer_get_current (b0);
- udp0 = ip4_next_header (ip0);
- tcp0 = (tcp_header_t *) udp0;
-
- sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
-
- if (PREDICT_FALSE(ip0->ttl == 1))
- {
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
- icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
- ICMP4_time_exceeded_ttl_exceeded_in_transit,
- 0);
- next0 = SNAT_IN2OUT_NEXT_ICMP_ERROR;
- goto trace0;
- }
-
- proto0 = ip_proto_to_snat_proto (ip0->protocol);
-
- if (PREDICT_FALSE(proto0 == SNAT_PROTOCOL_ICMP))
- {
- rx_fib_index0 = ip4_fib_table_get_index_for_sw_if_index(sw_if_index0);
- icmp0 = (icmp46_header_t *) udp0;
-
- next0 = icmp_in2out(sm, b0, ip0, icmp0, sw_if_index0,
- rx_fib_index0, node, next0, thread_index,
- &ses0, &dm0);
- goto trace0;
- }
-
- dm0 = snat_det_map_by_user(sm, &ip0->src_address);
- if (PREDICT_FALSE(!dm0))
- {
- nat_log_info ("no match for internal host %U",
- format_ip4_address, &ip0->src_address);
- next0 = SNAT_IN2OUT_NEXT_DROP;
- b0->error = node->errors[SNAT_IN2OUT_ERROR_NO_TRANSLATION];
- goto trace0;
- }
-
- snat_det_forward(dm0, &ip0->src_address, &new_addr0, &lo_port0);
-
- key0.ext_host_addr = ip0->dst_address;
- key0.ext_host_port = tcp0->dst;
-
- ses0 = snat_det_find_ses_by_in(dm0, &ip0->src_address, tcp0->src, key0);
- if (PREDICT_FALSE(!ses0))
- {
- for (i0 = 0; i0 < dm0->ports_per_host; i0++)
- {
- key0.out_port = clib_host_to_net_u16 (lo_port0 +
- ((i0 + clib_net_to_host_u16 (tcp0->src)) % dm0->ports_per_host));
-
- if (snat_det_get_ses_by_out (dm0, &ip0->src_address, key0.as_u64))
- continue;
-
- ses0 = snat_det_ses_create(dm0, &ip0->src_address, tcp0->src, &key0);
- break;
- }
- if (PREDICT_FALSE(!ses0))
- {
- /* too many sessions for user, send ICMP error packet */
-
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
- icmp4_error_set_vnet_buffer (b0, ICMP4_destination_unreachable,
- ICMP4_destination_unreachable_destination_unreachable_host,
- 0);
- next0 = SNAT_IN2OUT_NEXT_ICMP_ERROR;
- goto trace0;
- }
- }
-
- new_port0 = ses0->out.out_port;
-
- old_addr0.as_u32 = ip0->src_address.as_u32;
- ip0->src_address.as_u32 = new_addr0.as_u32;
- vnet_buffer(b0)->sw_if_index[VLIB_TX] = sm->outside_fib_index;
-
- sum0 = ip0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0.as_u32, new_addr0.as_u32,
- ip4_header_t,
- src_address /* changed member */);
- ip0->checksum = ip_csum_fold (sum0);
-
- if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP))
- {
- if (tcp0->flags & TCP_FLAG_SYN)
- ses0->state = SNAT_SESSION_TCP_SYN_SENT;
- else if (tcp0->flags & TCP_FLAG_ACK && ses0->state == SNAT_SESSION_TCP_SYN_SENT)
- ses0->state = SNAT_SESSION_TCP_ESTABLISHED;
- else if (tcp0->flags & TCP_FLAG_FIN && ses0->state == SNAT_SESSION_TCP_ESTABLISHED)
- ses0->state = SNAT_SESSION_TCP_FIN_WAIT;
- else if (tcp0->flags & TCP_FLAG_ACK && ses0->state == SNAT_SESSION_TCP_FIN_WAIT)
- snat_det_ses_close(dm0, ses0);
- else if (tcp0->flags & TCP_FLAG_FIN && ses0->state == SNAT_SESSION_TCP_CLOSE_WAIT)
- ses0->state = SNAT_SESSION_TCP_LAST_ACK;
- else if (tcp0->flags == 0 && ses0->state == SNAT_SESSION_UNKNOWN)
- ses0->state = SNAT_SESSION_TCP_ESTABLISHED;
-
- old_port0 = tcp0->src;
- tcp0->src = new_port0;
-
- sum0 = tcp0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0.as_u32, new_addr0.as_u32,
- ip4_header_t,
- dst_address /* changed member */);
- sum0 = ip_csum_update (sum0, old_port0, new_port0,
- ip4_header_t /* cheat */,
- length /* changed member */);
- mss_clamping (sm, tcp0, &sum0);
- tcp0->checksum = ip_csum_fold(sum0);
- }
- else
- {
- ses0->state = SNAT_SESSION_UDP_ACTIVE;
- old_port0 = udp0->src_port;
- udp0->src_port = new_port0;
- udp0->checksum = 0;
- }
-
- switch(ses0->state)
- {
- case SNAT_SESSION_UDP_ACTIVE:
- ses0->expire = now + sm->udp_timeout;
- break;
- case SNAT_SESSION_TCP_SYN_SENT:
- case SNAT_SESSION_TCP_FIN_WAIT:
- case SNAT_SESSION_TCP_CLOSE_WAIT:
- case SNAT_SESSION_TCP_LAST_ACK:
- ses0->expire = now + sm->tcp_transitory_timeout;
- break;
- case SNAT_SESSION_TCP_ESTABLISHED:
- ses0->expire = now + sm->tcp_established_timeout;
- break;
- }
-
- trace0:
- if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b0->flags & VLIB_BUFFER_IS_TRACED)))
- {
- snat_in2out_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->is_slow_path = 0;
- t->sw_if_index = sw_if_index0;
- t->next_index = next0;
- t->session_index = ~0;
- if (ses0)
- t->session_index = ses0 - dm0->sessions;
- }
-
- pkts_processed += next0 != SNAT_IN2OUT_NEXT_DROP;
-
- ip1 = vlib_buffer_get_current (b1);
- udp1 = ip4_next_header (ip1);
- tcp1 = (tcp_header_t *) udp1;
-
- sw_if_index1 = vnet_buffer(b1)->sw_if_index[VLIB_RX];
-
- if (PREDICT_FALSE(ip1->ttl == 1))
- {
- vnet_buffer (b1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
- icmp4_error_set_vnet_buffer (b1, ICMP4_time_exceeded,
- ICMP4_time_exceeded_ttl_exceeded_in_transit,
- 0);
- next1 = SNAT_IN2OUT_NEXT_ICMP_ERROR;
- goto trace1;
- }
-
- proto1 = ip_proto_to_snat_proto (ip1->protocol);
-
- if (PREDICT_FALSE(proto1 == SNAT_PROTOCOL_ICMP))
- {
- rx_fib_index1 = ip4_fib_table_get_index_for_sw_if_index(sw_if_index1);
- icmp1 = (icmp46_header_t *) udp1;
-
- next1 = icmp_in2out(sm, b1, ip1, icmp1, sw_if_index1,
- rx_fib_index1, node, next1, thread_index,
- &ses1, &dm1);
- goto trace1;
- }
-
- dm1 = snat_det_map_by_user(sm, &ip1->src_address);
- if (PREDICT_FALSE(!dm1))
- {
- nat_log_info ("no match for internal host %U",
- format_ip4_address, &ip0->src_address);
- next1 = SNAT_IN2OUT_NEXT_DROP;
- b1->error = node->errors[SNAT_IN2OUT_ERROR_NO_TRANSLATION];
- goto trace1;
- }
-
- snat_det_forward(dm1, &ip1->src_address, &new_addr1, &lo_port1);
-
- key1.ext_host_addr = ip1->dst_address;
- key1.ext_host_port = tcp1->dst;
-
- ses1 = snat_det_find_ses_by_in(dm1, &ip1->src_address, tcp1->src, key1);
- if (PREDICT_FALSE(!ses1))
- {
- for (i1 = 0; i1 < dm1->ports_per_host; i1++)
- {
- key1.out_port = clib_host_to_net_u16 (lo_port1 +
- ((i1 + clib_net_to_host_u16 (tcp1->src)) % dm1->ports_per_host));
-
- if (snat_det_get_ses_by_out (dm1, &ip1->src_address, key1.as_u64))
- continue;
-
- ses1 = snat_det_ses_create(dm1, &ip1->src_address, tcp1->src, &key1);
- break;
- }
- if (PREDICT_FALSE(!ses1))
- {
- /* too many sessions for user, send ICMP error packet */
-
- vnet_buffer (b1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
- icmp4_error_set_vnet_buffer (b1, ICMP4_destination_unreachable,
- ICMP4_destination_unreachable_destination_unreachable_host,
- 0);
- next1 = SNAT_IN2OUT_NEXT_ICMP_ERROR;
- goto trace1;
- }
- }
-
- new_port1 = ses1->out.out_port;
-
- old_addr1.as_u32 = ip1->src_address.as_u32;
- ip1->src_address.as_u32 = new_addr1.as_u32;
- vnet_buffer(b1)->sw_if_index[VLIB_TX] = sm->outside_fib_index;
-
- sum1 = ip1->checksum;
- sum1 = ip_csum_update (sum1, old_addr1.as_u32, new_addr1.as_u32,
- ip4_header_t,
- src_address /* changed member */);
- ip1->checksum = ip_csum_fold (sum1);
-
- if (PREDICT_TRUE(proto1 == SNAT_PROTOCOL_TCP))
- {
- if (tcp1->flags & TCP_FLAG_SYN)
- ses1->state = SNAT_SESSION_TCP_SYN_SENT;
- else if (tcp1->flags & TCP_FLAG_ACK && ses1->state == SNAT_SESSION_TCP_SYN_SENT)
- ses1->state = SNAT_SESSION_TCP_ESTABLISHED;
- else if (tcp1->flags & TCP_FLAG_FIN && ses1->state == SNAT_SESSION_TCP_ESTABLISHED)
- ses1->state = SNAT_SESSION_TCP_FIN_WAIT;
- else if (tcp1->flags & TCP_FLAG_ACK && ses1->state == SNAT_SESSION_TCP_FIN_WAIT)
- snat_det_ses_close(dm1, ses1);
- else if (tcp1->flags & TCP_FLAG_FIN && ses1->state == SNAT_SESSION_TCP_CLOSE_WAIT)
- ses1->state = SNAT_SESSION_TCP_LAST_ACK;
- else if (tcp1->flags == 0 && ses1->state == SNAT_SESSION_UNKNOWN)
- ses1->state = SNAT_SESSION_TCP_ESTABLISHED;
-
- old_port1 = tcp1->src;
- tcp1->src = new_port1;
-
- sum1 = tcp1->checksum;
- sum1 = ip_csum_update (sum1, old_addr1.as_u32, new_addr1.as_u32,
- ip4_header_t,
- dst_address /* changed member */);
- sum1 = ip_csum_update (sum1, old_port1, new_port1,
- ip4_header_t /* cheat */,
- length /* changed member */);
- mss_clamping (sm, tcp1, &sum1);
- tcp1->checksum = ip_csum_fold(sum1);
- }
- else
- {
- ses1->state = SNAT_SESSION_UDP_ACTIVE;
- old_port1 = udp1->src_port;
- udp1->src_port = new_port1;
- udp1->checksum = 0;
- }
-
- switch(ses1->state)
- {
- case SNAT_SESSION_UDP_ACTIVE:
- ses1->expire = now + sm->udp_timeout;
- break;
- case SNAT_SESSION_TCP_SYN_SENT:
- case SNAT_SESSION_TCP_FIN_WAIT:
- case SNAT_SESSION_TCP_CLOSE_WAIT:
- case SNAT_SESSION_TCP_LAST_ACK:
- ses1->expire = now + sm->tcp_transitory_timeout;
- break;
- case SNAT_SESSION_TCP_ESTABLISHED:
- ses1->expire = now + sm->tcp_established_timeout;
- break;
- }
-
- trace1:
- if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b1->flags & VLIB_BUFFER_IS_TRACED)))
- {
- snat_in2out_trace_t *t =
- vlib_add_trace (vm, node, b1, sizeof (*t));
- t->is_slow_path = 0;
- t->sw_if_index = sw_if_index1;
- t->next_index = next1;
- t->session_index = ~0;
- if (ses1)
- t->session_index = ses1 - dm1->sessions;
- }
-
- pkts_processed += next1 != SNAT_IN2OUT_NEXT_DROP;
-
- /* verify speculative enqueues, maybe switch current next frame */
- vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
- to_next, n_left_to_next,
- bi0, bi1, next0, next1);
- }
-
- while (n_left_from > 0 && n_left_to_next > 0)
- {
- u32 bi0;
- vlib_buffer_t * b0;
- u32 next0;
- u32 sw_if_index0;
- ip4_header_t * ip0;
- ip_csum_t sum0;
- ip4_address_t new_addr0, old_addr0;
- u16 old_port0, new_port0, lo_port0, i0;
- udp_header_t * udp0;
- tcp_header_t * tcp0;
- u32 proto0;
- snat_det_out_key_t key0;
- snat_det_map_t * dm0;
- snat_det_session_t * ses0 = 0;
- u32 rx_fib_index0;
- icmp46_header_t * icmp0;
-
- /* speculatively enqueue b0 to the current next frame */
- bi0 = from[0];
- to_next[0] = bi0;
- from += 1;
- to_next += 1;
- n_left_from -= 1;
- n_left_to_next -= 1;
-
- b0 = vlib_get_buffer (vm, bi0);
- next0 = SNAT_IN2OUT_NEXT_LOOKUP;
-
- ip0 = vlib_buffer_get_current (b0);
- udp0 = ip4_next_header (ip0);
- tcp0 = (tcp_header_t *) udp0;
-
- sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
-
- if (PREDICT_FALSE(ip0->ttl == 1))
- {
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
- icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
- ICMP4_time_exceeded_ttl_exceeded_in_transit,
- 0);
- next0 = SNAT_IN2OUT_NEXT_ICMP_ERROR;
- goto trace00;
- }
-
- proto0 = ip_proto_to_snat_proto (ip0->protocol);
-
- if (PREDICT_FALSE(proto0 == SNAT_PROTOCOL_ICMP))
- {
- rx_fib_index0 = ip4_fib_table_get_index_for_sw_if_index(sw_if_index0);
- icmp0 = (icmp46_header_t *) udp0;
-
- next0 = icmp_in2out(sm, b0, ip0, icmp0, sw_if_index0,
- rx_fib_index0, node, next0, thread_index,
- &ses0, &dm0);
- goto trace00;
- }
-
- dm0 = snat_det_map_by_user(sm, &ip0->src_address);
- if (PREDICT_FALSE(!dm0))
- {
- nat_log_info ("no match for internal host %U",
- format_ip4_address, &ip0->src_address);
- next0 = SNAT_IN2OUT_NEXT_DROP;
- b0->error = node->errors[SNAT_IN2OUT_ERROR_NO_TRANSLATION];
- goto trace00;
- }
-
- snat_det_forward(dm0, &ip0->src_address, &new_addr0, &lo_port0);
-
- key0.ext_host_addr = ip0->dst_address;
- key0.ext_host_port = tcp0->dst;
-
- ses0 = snat_det_find_ses_by_in(dm0, &ip0->src_address, tcp0->src, key0);
- if (PREDICT_FALSE(!ses0))
- {
- for (i0 = 0; i0 < dm0->ports_per_host; i0++)
- {
- key0.out_port = clib_host_to_net_u16 (lo_port0 +
- ((i0 + clib_net_to_host_u16 (tcp0->src)) % dm0->ports_per_host));
-
- if (snat_det_get_ses_by_out (dm0, &ip0->src_address, key0.as_u64))
- continue;
-
- ses0 = snat_det_ses_create(dm0, &ip0->src_address, tcp0->src, &key0);
- break;
- }
- if (PREDICT_FALSE(!ses0))
- {
- /* too many sessions for user, send ICMP error packet */
-
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
- icmp4_error_set_vnet_buffer (b0, ICMP4_destination_unreachable,
- ICMP4_destination_unreachable_destination_unreachable_host,
- 0);
- next0 = SNAT_IN2OUT_NEXT_ICMP_ERROR;
- goto trace00;
- }
- }
-
- new_port0 = ses0->out.out_port;
-
- old_addr0.as_u32 = ip0->src_address.as_u32;
- ip0->src_address.as_u32 = new_addr0.as_u32;
- vnet_buffer(b0)->sw_if_index[VLIB_TX] = sm->outside_fib_index;
-
- sum0 = ip0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0.as_u32, new_addr0.as_u32,
- ip4_header_t,
- src_address /* changed member */);
- ip0->checksum = ip_csum_fold (sum0);
-
- if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP))
- {
- if (tcp0->flags & TCP_FLAG_SYN)
- ses0->state = SNAT_SESSION_TCP_SYN_SENT;
- else if (tcp0->flags & TCP_FLAG_ACK && ses0->state == SNAT_SESSION_TCP_SYN_SENT)
- ses0->state = SNAT_SESSION_TCP_ESTABLISHED;
- else if (tcp0->flags & TCP_FLAG_FIN && ses0->state == SNAT_SESSION_TCP_ESTABLISHED)
- ses0->state = SNAT_SESSION_TCP_FIN_WAIT;
- else if (tcp0->flags & TCP_FLAG_ACK && ses0->state == SNAT_SESSION_TCP_FIN_WAIT)
- snat_det_ses_close(dm0, ses0);
- else if (tcp0->flags & TCP_FLAG_FIN && ses0->state == SNAT_SESSION_TCP_CLOSE_WAIT)
- ses0->state = SNAT_SESSION_TCP_LAST_ACK;
- else if (tcp0->flags == 0 && ses0->state == SNAT_SESSION_UNKNOWN)
- ses0->state = SNAT_SESSION_TCP_ESTABLISHED;
-
- old_port0 = tcp0->src;
- tcp0->src = new_port0;
-
- sum0 = tcp0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0.as_u32, new_addr0.as_u32,
- ip4_header_t,
- dst_address /* changed member */);
- sum0 = ip_csum_update (sum0, old_port0, new_port0,
- ip4_header_t /* cheat */,
- length /* changed member */);
- mss_clamping (sm, tcp0, &sum0);
- tcp0->checksum = ip_csum_fold(sum0);
- }
- else
- {
- ses0->state = SNAT_SESSION_UDP_ACTIVE;
- old_port0 = udp0->src_port;
- udp0->src_port = new_port0;
- udp0->checksum = 0;
- }
-
- switch(ses0->state)
- {
- case SNAT_SESSION_UDP_ACTIVE:
- ses0->expire = now + sm->udp_timeout;
- break;
- case SNAT_SESSION_TCP_SYN_SENT:
- case SNAT_SESSION_TCP_FIN_WAIT:
- case SNAT_SESSION_TCP_CLOSE_WAIT:
- case SNAT_SESSION_TCP_LAST_ACK:
- ses0->expire = now + sm->tcp_transitory_timeout;
- break;
- case SNAT_SESSION_TCP_ESTABLISHED:
- ses0->expire = now + sm->tcp_established_timeout;
- break;
- }
-
- trace00:
- if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b0->flags & VLIB_BUFFER_IS_TRACED)))
- {
- snat_in2out_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->is_slow_path = 0;
- t->sw_if_index = sw_if_index0;
- t->next_index = next0;
- t->session_index = ~0;
- if (ses0)
- t->session_index = ses0 - dm0->sessions;
- }
-
- pkts_processed += next0 != SNAT_IN2OUT_NEXT_DROP;
-
- /* verify speculative enqueue, maybe switch current next frame */
- vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
- to_next, n_left_to_next,
- bi0, next0);
- }
-
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
- }
-
- vlib_node_increment_counter (vm, snat_det_in2out_node.index,
- SNAT_IN2OUT_ERROR_IN2OUT_PACKETS,
- pkts_processed);
- return frame->n_vectors;
-}
-
-VLIB_REGISTER_NODE (snat_det_in2out_node) = {
- .function = snat_det_in2out_node_fn,
- .name = "nat44-det-in2out",
- .vector_size = sizeof (u32),
- .format_trace = format_snat_in2out_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
-
- .n_errors = ARRAY_LEN(snat_in2out_error_strings),
- .error_strings = snat_in2out_error_strings,
-
- .runtime_data_bytes = sizeof (snat_runtime_t),
-
- .n_next_nodes = 3,
-
- /* edit / add dispositions here */
- .next_nodes = {
- [SNAT_IN2OUT_NEXT_DROP] = "error-drop",
- [SNAT_IN2OUT_NEXT_LOOKUP] = "ip4-lookup",
- [SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
- },
-};
-
-VLIB_NODE_FUNCTION_MULTIARCH (snat_det_in2out_node, snat_det_in2out_node_fn);
-
-/**
- * Get address and port values to be used for ICMP packet translation
- * and create session if needed
- *
- * @param[in,out] sm NAT main
- * @param[in,out] node NAT node runtime
- * @param[in] thread_index thread index
- * @param[in,out] b0 buffer containing packet to be translated
- * @param[out] p_proto protocol used for matching
- * @param[out] p_value address and port after NAT translation
- * @param[out] p_dont_translate if packet should not be translated
- * @param d optional parameter
- * @param e optional parameter
- */
-u32 icmp_match_in2out_det(snat_main_t *sm, vlib_node_runtime_t *node,
- u32 thread_index, vlib_buffer_t *b0,
- ip4_header_t *ip0, u8 *p_proto,
- snat_session_key_t *p_value,
- u8 *p_dont_translate, void *d, void *e)
-{
- icmp46_header_t *icmp0;
- u32 sw_if_index0;
- u32 rx_fib_index0;
- u8 protocol;
- snat_det_out_key_t key0;
- u8 dont_translate = 0;
- u32 next0 = ~0;
- icmp_echo_header_t *echo0, *inner_echo0 = 0;
- ip4_header_t *inner_ip0;
- void *l4_header = 0;
- icmp46_header_t *inner_icmp0;
- snat_det_map_t * dm0 = 0;
- ip4_address_t new_addr0;
- u16 lo_port0, i0;
- snat_det_session_t * ses0 = 0;
- ip4_address_t in_addr;
- u16 in_port;
-
- icmp0 = (icmp46_header_t *) ip4_next_header (ip0);
- echo0 = (icmp_echo_header_t *)(icmp0+1);
- sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
- rx_fib_index0 = ip4_fib_table_get_index_for_sw_if_index (sw_if_index0);
-
- if (!icmp_is_error_message (icmp0))
- {
- protocol = SNAT_PROTOCOL_ICMP;
- in_addr = ip0->src_address;
- in_port = echo0->identifier;
- }
- else
- {
- inner_ip0 = (ip4_header_t *)(echo0+1);
- l4_header = ip4_next_header (inner_ip0);
- protocol = ip_proto_to_snat_proto (inner_ip0->protocol);
- in_addr = inner_ip0->dst_address;
- switch (protocol)
- {
- case SNAT_PROTOCOL_ICMP:
- inner_icmp0 = (icmp46_header_t*)l4_header;
- inner_echo0 = (icmp_echo_header_t *)(inner_icmp0+1);
- in_port = inner_echo0->identifier;
- break;
- case SNAT_PROTOCOL_UDP:
- case SNAT_PROTOCOL_TCP:
- in_port = ((tcp_udp_header_t*)l4_header)->dst_port;
- break;
- default:
- b0->error = node->errors[SNAT_IN2OUT_ERROR_UNSUPPORTED_PROTOCOL];
- next0 = SNAT_IN2OUT_NEXT_DROP;
- goto out;
- }
- }
-
- dm0 = snat_det_map_by_user(sm, &in_addr);
- if (PREDICT_FALSE(!dm0))
- {
- nat_log_info ("no match for internal host %U",
- format_ip4_address, &in_addr);
- if (PREDICT_FALSE(snat_not_translate_fast(sm, node, sw_if_index0, ip0,
- IP_PROTOCOL_ICMP, rx_fib_index0)))
- {
- dont_translate = 1;
- goto out;
- }
- next0 = SNAT_IN2OUT_NEXT_DROP;
- b0->error = node->errors[SNAT_IN2OUT_ERROR_NO_TRANSLATION];
- goto out;
- }
-
- snat_det_forward(dm0, &in_addr, &new_addr0, &lo_port0);
-
- key0.ext_host_addr = ip0->dst_address;
- key0.ext_host_port = 0;
-
- ses0 = snat_det_find_ses_by_in(dm0, &in_addr, in_port, key0);
- if (PREDICT_FALSE(!ses0))
- {
- if (PREDICT_FALSE(snat_not_translate_fast(sm, node, sw_if_index0, ip0,
- IP_PROTOCOL_ICMP, rx_fib_index0)))
- {
- dont_translate = 1;
- goto out;
- }
- if (icmp0->type != ICMP4_echo_request)
- {
- b0->error = node->errors[SNAT_IN2OUT_ERROR_BAD_ICMP_TYPE];
- next0 = SNAT_IN2OUT_NEXT_DROP;
- goto out;
- }
- for (i0 = 0; i0 < dm0->ports_per_host; i0++)
- {
- key0.out_port = clib_host_to_net_u16 (lo_port0 +
- ((i0 + clib_net_to_host_u16 (echo0->identifier)) % dm0->ports_per_host));
-
- if (snat_det_get_ses_by_out (dm0, &in_addr, key0.as_u64))
- continue;
-
- ses0 = snat_det_ses_create(dm0, &in_addr, echo0->identifier, &key0);
- break;
- }
- if (PREDICT_FALSE(!ses0))
- {
- next0 = SNAT_IN2OUT_NEXT_DROP;
- b0->error = node->errors[SNAT_IN2OUT_ERROR_OUT_OF_PORTS];
- goto out;
- }
- }
-
- if (PREDICT_FALSE(icmp0->type != ICMP4_echo_request &&
- !icmp_is_error_message (icmp0)))
- {
- b0->error = node->errors[SNAT_IN2OUT_ERROR_BAD_ICMP_TYPE];
- next0 = SNAT_IN2OUT_NEXT_DROP;
- goto out;
- }
-
- u32 now = (u32) vlib_time_now (sm->vlib_main);
-
- ses0->state = SNAT_SESSION_ICMP_ACTIVE;
- ses0->expire = now + sm->icmp_timeout;
-
-out:
- *p_proto = protocol;
- if (ses0)
- {
- p_value->addr = new_addr0;
- p_value->fib_index = sm->outside_fib_index;
- p_value->port = ses0->out.out_port;
- }
- *p_dont_translate = dont_translate;
- if (d)
- *(snat_det_session_t**)d = ses0;
- if (e)
- *(snat_det_map_t**)e = dm0;
- return next0;
-}
-
-/**********************/
-/*** worker handoff ***/
-/**********************/
-static inline uword
-snat_in2out_worker_handoff_fn_inline (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame,
- u8 is_output)
-{
- snat_main_t *sm = &snat_main;
- vlib_thread_main_t *tm = vlib_get_thread_main ();
- u32 n_left_from, *from, *to_next = 0, *to_next_drop = 0;
- static __thread vlib_frame_queue_elt_t **handoff_queue_elt_by_worker_index;
- static __thread vlib_frame_queue_t **congested_handoff_queue_by_worker_index
- = 0;
- vlib_frame_queue_elt_t *hf = 0;
- vlib_frame_queue_t *fq;
- vlib_frame_t *f = 0;
- int i;
- u32 n_left_to_next_worker = 0, *to_next_worker = 0;
- u32 next_worker_index = 0;
- u32 current_worker_index = ~0;
- u32 thread_index = vm->thread_index;
- u32 fq_index;
- u32 to_node_index;
- vlib_frame_t *d = 0;
-
- ASSERT (vec_len (sm->workers));
-
- if (is_output)
- {
- fq_index = sm->fq_in2out_output_index;
- to_node_index = sm->in2out_output_node_index;
- }
- else
- {
- fq_index = sm->fq_in2out_index;
- to_node_index = sm->in2out_node_index;
- }
-
- if (PREDICT_FALSE (handoff_queue_elt_by_worker_index == 0))
- {
- vec_validate (handoff_queue_elt_by_worker_index, tm->n_vlib_mains - 1);
-
- vec_validate_init_empty (congested_handoff_queue_by_worker_index,
- tm->n_vlib_mains - 1,
- (vlib_frame_queue_t *) (~0));
- }
-
- from = vlib_frame_vector_args (frame);
- n_left_from = frame->n_vectors;
-
- while (n_left_from > 0)
- {
- u32 bi0;
- vlib_buffer_t *b0;
- u32 sw_if_index0;
- u32 rx_fib_index0;
- ip4_header_t * ip0;
- u8 do_handoff;
-
- bi0 = from[0];
- from += 1;
- n_left_from -= 1;
-
- b0 = vlib_get_buffer (vm, bi0);
-
- sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
- rx_fib_index0 = ip4_fib_table_get_index_for_sw_if_index(sw_if_index0);
-
- ip0 = vlib_buffer_get_current (b0);
-
- next_worker_index = sm->worker_in2out_cb(ip0, rx_fib_index0);
-
- if (PREDICT_FALSE (next_worker_index != thread_index))
- {
- do_handoff = 1;
-
- if (next_worker_index != current_worker_index)
- {
- fq = is_vlib_frame_queue_congested (
- fq_index, next_worker_index, NAT_FQ_NELTS - 2,
- congested_handoff_queue_by_worker_index);
-
- if (fq)
- {
- /* if this is 1st frame */
- if (!d)
- {
- d = vlib_get_frame_to_node (vm, sm->error_node_index);
- to_next_drop = vlib_frame_vector_args (d);
- }
-
- to_next_drop[0] = bi0;
- to_next_drop += 1;
- d->n_vectors++;
- b0->error = node->errors[SNAT_IN2OUT_ERROR_FQ_CONGESTED];
- goto trace0;
- }
-
- if (hf)
- hf->n_vectors = VLIB_FRAME_SIZE - n_left_to_next_worker;
-
- hf = vlib_get_worker_handoff_queue_elt (fq_index,
- next_worker_index,
- handoff_queue_elt_by_worker_index);
-
- n_left_to_next_worker = VLIB_FRAME_SIZE - hf->n_vectors;
- to_next_worker = &hf->buffer_index[hf->n_vectors];
- current_worker_index = next_worker_index;
- }
-
- /* enqueue to correct worker thread */
- to_next_worker[0] = bi0;
- to_next_worker++;
- n_left_to_next_worker--;
-
- if (n_left_to_next_worker == 0)
- {
- hf->n_vectors = VLIB_FRAME_SIZE;
- vlib_put_frame_queue_elt (hf);
- current_worker_index = ~0;
- handoff_queue_elt_by_worker_index[next_worker_index] = 0;
- hf = 0;
- }
- }
- else
- {
- do_handoff = 0;
- /* if this is 1st frame */
- if (!f)
- {
- f = vlib_get_frame_to_node (vm, to_node_index);
- to_next = vlib_frame_vector_args (f);
- }
-
- to_next[0] = bi0;
- to_next += 1;
- f->n_vectors++;
- }
-
-trace0:
- if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b0->flags & VLIB_BUFFER_IS_TRACED)))
- {
- snat_in2out_worker_handoff_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->next_worker_index = next_worker_index;
- t->do_handoff = do_handoff;
- }
- }
-
- if (f)
- vlib_put_frame_to_node (vm, to_node_index, f);
-
- if (d)
- vlib_put_frame_to_node (vm, sm->error_node_index, d);
-
- if (hf)
- hf->n_vectors = VLIB_FRAME_SIZE - n_left_to_next_worker;
-
- /* Ship frames to the worker nodes */
- for (i = 0; i < vec_len (handoff_queue_elt_by_worker_index); i++)
- {
- if (handoff_queue_elt_by_worker_index[i])
- {
- hf = handoff_queue_elt_by_worker_index[i];
- /*
- * It works better to let the handoff node
- * rate-adapt, always ship the handoff queue element.
- */
- if (1 || hf->n_vectors == hf->last_n_vectors)
- {
- vlib_put_frame_queue_elt (hf);
- handoff_queue_elt_by_worker_index[i] = 0;
- }
- else
- hf->last_n_vectors = hf->n_vectors;
- }
- congested_handoff_queue_by_worker_index[i] =
- (vlib_frame_queue_t *) (~0);
- }
- hf = 0;
- current_worker_index = ~0;
- return frame->n_vectors;
-}
-
-static uword
-snat_in2out_worker_handoff_fn (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- return snat_in2out_worker_handoff_fn_inline (vm, node, frame, 0);
-}
-
-VLIB_REGISTER_NODE (snat_in2out_worker_handoff_node) = {
- .function = snat_in2out_worker_handoff_fn,
- .name = "nat44-in2out-worker-handoff",
- .vector_size = sizeof (u32),
- .format_trace = format_snat_in2out_worker_handoff_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
-
- .n_errors = ARRAY_LEN(snat_in2out_error_strings),
- .error_strings = snat_in2out_error_strings,
-
- .n_next_nodes = 1,
-
- .next_nodes = {
- [0] = "error-drop",
- },
-};
-
-VLIB_NODE_FUNCTION_MULTIARCH (snat_in2out_worker_handoff_node,
- snat_in2out_worker_handoff_fn);
-
-static uword
-snat_in2out_output_worker_handoff_fn (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- return snat_in2out_worker_handoff_fn_inline (vm, node, frame, 1);
-}
-
-VLIB_REGISTER_NODE (snat_in2out_output_worker_handoff_node) = {
- .function = snat_in2out_output_worker_handoff_fn,
- .name = "nat44-in2out-output-worker-handoff",
- .vector_size = sizeof (u32),
- .format_trace = format_snat_in2out_worker_handoff_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
-
- .n_next_nodes = 1,
-
- .next_nodes = {
- [0] = "error-drop",
- },
-};
-
-VLIB_NODE_FUNCTION_MULTIARCH (snat_in2out_output_worker_handoff_node,
- snat_in2out_output_worker_handoff_fn);
-
-static_always_inline int
-is_hairpinning (snat_main_t *sm, ip4_address_t * dst_addr)
-{
- snat_address_t * ap;
- clib_bihash_kv_8_8_t kv, value;
- snat_session_key_t m_key;
-
- vec_foreach (ap, sm->addresses)
- {
- if (ap->addr.as_u32 == dst_addr->as_u32)
- return 1;
- }
-
- m_key.addr.as_u32 = dst_addr->as_u32;
- m_key.fib_index = 0;
- m_key.port = 0;
- m_key.protocol = 0;
- kv.key = m_key.as_u64;
- if (!clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value))
- return 1;
-
- return 0;
-}
-
-static inline uword
-snat_hairpin_dst_fn_inline (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame,
- int is_ed)
-{
- u32 n_left_from, * from, * to_next, stats_node_index;
- snat_in2out_next_t next_index;
- u32 pkts_processed = 0;
- snat_main_t * sm = &snat_main;
-
- stats_node_index = is_ed ? nat44_ed_hairpin_dst_node.index :
- snat_hairpin_dst_node.index;
-
- from = vlib_frame_vector_args (frame);
- n_left_from = frame->n_vectors;
- next_index = node->cached_next_index;
-
- while (n_left_from > 0)
- {
- u32 n_left_to_next;
-
- vlib_get_next_frame (vm, node, next_index,
- to_next, n_left_to_next);
-
- while (n_left_from > 0 && n_left_to_next > 0)
- {
- u32 bi0;
- vlib_buffer_t * b0;
- u32 next0;
- ip4_header_t * ip0;
- u32 proto0;
-
- /* speculatively enqueue b0 to the current next frame */
- bi0 = from[0];
- to_next[0] = bi0;
- from += 1;
- to_next += 1;
- n_left_from -= 1;
- n_left_to_next -= 1;
-
- b0 = vlib_get_buffer (vm, bi0);
- next0 = SNAT_IN2OUT_NEXT_LOOKUP;
- ip0 = vlib_buffer_get_current (b0);
-
- proto0 = ip_proto_to_snat_proto (ip0->protocol);
-
- vnet_buffer (b0)->snat.flags = 0;
- if (PREDICT_FALSE (is_hairpinning (sm, &ip0->dst_address)))
- {
- if (proto0 == SNAT_PROTOCOL_TCP || proto0 == SNAT_PROTOCOL_UDP)
- {
- udp_header_t * udp0 = ip4_next_header (ip0);
- tcp_header_t * tcp0 = (tcp_header_t *) udp0;
-
- snat_hairpinning (sm, b0, ip0, udp0, tcp0, proto0, is_ed);
- }
- else if (proto0 == SNAT_PROTOCOL_ICMP)
- {
- icmp46_header_t * icmp0 = ip4_next_header (ip0);
-
- snat_icmp_hairpinning (sm, b0, ip0, icmp0, is_ed);
- }
- else
- {
- if (is_ed)
- nat44_ed_hairpinning_unknown_proto (sm, b0, ip0);
- else
- nat_hairpinning_sm_unknown_proto (sm, b0, ip0);
- }
-
- vnet_buffer (b0)->snat.flags = SNAT_FLAG_HAIRPINNING;
- }
-
- pkts_processed += next0 != SNAT_IN2OUT_NEXT_DROP;
-
- /* verify speculative enqueue, maybe switch current next frame */
- vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
- to_next, n_left_to_next,
- bi0, next0);
- }
-
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
- }
-
- vlib_node_increment_counter (vm, stats_node_index,
- SNAT_IN2OUT_ERROR_IN2OUT_PACKETS,
- pkts_processed);
- return frame->n_vectors;
-}
-
-static uword
-snat_hairpin_dst_fn (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- return snat_hairpin_dst_fn_inline (vm, node, frame, 0);
-}
-
-VLIB_REGISTER_NODE (snat_hairpin_dst_node) = {
- .function = snat_hairpin_dst_fn,
- .name = "nat44-hairpin-dst",
- .vector_size = sizeof (u32),
- .type = VLIB_NODE_TYPE_INTERNAL,
- .n_errors = ARRAY_LEN(snat_in2out_error_strings),
- .error_strings = snat_in2out_error_strings,
- .n_next_nodes = 2,
- .next_nodes = {
- [SNAT_IN2OUT_NEXT_DROP] = "error-drop",
- [SNAT_IN2OUT_NEXT_LOOKUP] = "ip4-lookup",
- },
-};
-
-VLIB_NODE_FUNCTION_MULTIARCH (snat_hairpin_dst_node,
- snat_hairpin_dst_fn);
-
-static uword
-nat44_ed_hairpin_dst_fn (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- return snat_hairpin_dst_fn_inline (vm, node, frame, 1);
-}
-
-VLIB_REGISTER_NODE (nat44_ed_hairpin_dst_node) = {
- .function = nat44_ed_hairpin_dst_fn,
- .name = "nat44-ed-hairpin-dst",
- .vector_size = sizeof (u32),
- .type = VLIB_NODE_TYPE_INTERNAL,
- .n_errors = ARRAY_LEN(snat_in2out_error_strings),
- .error_strings = snat_in2out_error_strings,
- .n_next_nodes = 2,
- .next_nodes = {
- [SNAT_IN2OUT_NEXT_DROP] = "error-drop",
- [SNAT_IN2OUT_NEXT_LOOKUP] = "ip4-lookup",
- },
-};
-
-VLIB_NODE_FUNCTION_MULTIARCH (nat44_ed_hairpin_dst_node,
- nat44_ed_hairpin_dst_fn);
-
-static inline uword
-snat_hairpin_src_fn_inline (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame,
- int is_ed)
-{
- u32 n_left_from, * from, * to_next, stats_node_index;
+ u32 n_left_from, *from, *to_next;
snat_in2out_next_t next_index;
u32 pkts_processed = 0;
snat_main_t *sm = &snat_main;
-
- stats_node_index = is_ed ? nat44_ed_hairpin_src_node.index :
- snat_hairpin_src_node.index;
-
- from = vlib_frame_vector_args (frame);
- n_left_from = frame->n_vectors;
- next_index = node->cached_next_index;
-
- while (n_left_from > 0)
- {
- u32 n_left_to_next;
-
- vlib_get_next_frame (vm, node, next_index,
- to_next, n_left_to_next);
-
- while (n_left_from > 0 && n_left_to_next > 0)
- {
- u32 bi0;
- vlib_buffer_t * b0;
- u32 next0;
- snat_interface_t *i;
- u32 sw_if_index0;
-
- /* speculatively enqueue b0 to the current next frame */
- bi0 = from[0];
- to_next[0] = bi0;
- from += 1;
- to_next += 1;
- n_left_from -= 1;
- n_left_to_next -= 1;
-
- b0 = vlib_get_buffer (vm, bi0);
- sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
- next0 = SNAT_HAIRPIN_SRC_NEXT_INTERFACE_OUTPUT;
-
- pool_foreach (i, sm->output_feature_interfaces,
- ({
- /* Only packets from NAT inside interface */
- if ((nat_interface_is_inside(i)) && (sw_if_index0 == i->sw_if_index))
- {
- if (PREDICT_FALSE ((vnet_buffer (b0)->snat.flags) &
- SNAT_FLAG_HAIRPINNING))
- {
- if (PREDICT_TRUE (sm->num_workers > 1))
- next0 = SNAT_HAIRPIN_SRC_NEXT_SNAT_IN2OUT_WH;
- else
- next0 = SNAT_HAIRPIN_SRC_NEXT_SNAT_IN2OUT;
- }
- break;
- }
- }));
-
- pkts_processed += next0 != SNAT_IN2OUT_NEXT_DROP;
-
- /* verify speculative enqueue, maybe switch current next frame */
- vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
- to_next, n_left_to_next,
- bi0, next0);
- }
-
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
- }
-
- vlib_node_increment_counter (vm, stats_node_index,
- SNAT_IN2OUT_ERROR_IN2OUT_PACKETS,
- pkts_processed);
- return frame->n_vectors;
-}
-
-static uword
-snat_hairpin_src_fn (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- return snat_hairpin_src_fn_inline (vm, node, frame, 0);
-}
-
-VLIB_REGISTER_NODE (snat_hairpin_src_node) = {
- .function = snat_hairpin_src_fn,
- .name = "nat44-hairpin-src",
- .vector_size = sizeof (u32),
- .type = VLIB_NODE_TYPE_INTERNAL,
- .n_errors = ARRAY_LEN(snat_in2out_error_strings),
- .error_strings = snat_in2out_error_strings,
- .n_next_nodes = SNAT_HAIRPIN_SRC_N_NEXT,
- .next_nodes = {
- [SNAT_HAIRPIN_SRC_NEXT_DROP] = "error-drop",
- [SNAT_HAIRPIN_SRC_NEXT_SNAT_IN2OUT] = "nat44-in2out-output",
- [SNAT_HAIRPIN_SRC_NEXT_INTERFACE_OUTPUT] = "interface-output",
- [SNAT_HAIRPIN_SRC_NEXT_SNAT_IN2OUT_WH] = "nat44-in2out-output-worker-handoff",
- },
-};
-
-VLIB_NODE_FUNCTION_MULTIARCH (snat_hairpin_src_node,
- snat_hairpin_src_fn);
-
-static uword
-nat44_ed_hairpin_src_fn (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- return snat_hairpin_src_fn_inline (vm, node, frame, 1);
-}
-
-VLIB_REGISTER_NODE (nat44_ed_hairpin_src_node) = {
- .function = nat44_ed_hairpin_src_fn,
- .name = "nat44-ed-hairpin-src",
- .vector_size = sizeof (u32),
- .type = VLIB_NODE_TYPE_INTERNAL,
- .n_errors = ARRAY_LEN(snat_in2out_error_strings),
- .error_strings = snat_in2out_error_strings,
- .n_next_nodes = SNAT_HAIRPIN_SRC_N_NEXT,
- .next_nodes = {
- [SNAT_HAIRPIN_SRC_NEXT_DROP] = "error-drop",
- [SNAT_HAIRPIN_SRC_NEXT_SNAT_IN2OUT] = "nat44-ed-in2out-output",
- [SNAT_HAIRPIN_SRC_NEXT_INTERFACE_OUTPUT] = "interface-output",
- [SNAT_HAIRPIN_SRC_NEXT_SNAT_IN2OUT_WH] = "nat44-in2out-output-worker-handoff",
- },
-};
-
-VLIB_NODE_FUNCTION_MULTIARCH (nat44_ed_hairpin_src_node,
- nat44_ed_hairpin_src_fn);
-
-static uword
-snat_in2out_fast_static_map_fn (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- u32 n_left_from, * from, * to_next;
- snat_in2out_next_t next_index;
- u32 pkts_processed = 0;
- snat_main_t * sm = &snat_main;
u32 stats_node_index;
stats_node_index = snat_in2out_fast_node.index;
{
u32 n_left_to_next;
- vlib_get_next_frame (vm, node, next_index,
- to_next, n_left_to_next);
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
while (n_left_from > 0 && n_left_to_next > 0)
{
- u32 bi0;
- vlib_buffer_t * b0;
- u32 next0;
- u32 sw_if_index0;
- ip4_header_t * ip0;
- ip_csum_t sum0;
- u32 new_addr0, old_addr0;
- u16 old_port0, new_port0;
- udp_header_t * udp0;
- tcp_header_t * tcp0;
- icmp46_header_t * icmp0;
- snat_session_key_t key0, sm0;
- u32 proto0;
- u32 rx_fib_index0;
-
- /* speculatively enqueue b0 to the current next frame */
+ u32 bi0;
+ vlib_buffer_t *b0;
+ u32 next0;
+ u32 sw_if_index0;
+ ip4_header_t *ip0;
+ ip_csum_t sum0;
+ u32 new_addr0, old_addr0;
+ u16 old_port0, new_port0;
+ udp_header_t *udp0;
+ tcp_header_t *tcp0;
+ icmp46_header_t *icmp0;
+ snat_session_key_t key0, sm0;
+ u32 proto0;
+ u32 rx_fib_index0;
+
+ /* speculatively enqueue b0 to the current next frame */
bi0 = from[0];
to_next[0] = bi0;
from += 1;
n_left_to_next -= 1;
b0 = vlib_get_buffer (vm, bi0);
- next0 = SNAT_IN2OUT_NEXT_LOOKUP;
+ next0 = SNAT_IN2OUT_NEXT_LOOKUP;
- ip0 = vlib_buffer_get_current (b0);
- udp0 = ip4_next_header (ip0);
- tcp0 = (tcp_header_t *) udp0;
- icmp0 = (icmp46_header_t *) udp0;
+ ip0 = vlib_buffer_get_current (b0);
+ udp0 = ip4_next_header (ip0);
+ tcp0 = (tcp_header_t *) udp0;
+ icmp0 = (icmp46_header_t *) udp0;
- sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
- rx_fib_index0 = ip4_fib_table_get_index_for_sw_if_index(sw_if_index0);
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+ rx_fib_index0 =
+ ip4_fib_table_get_index_for_sw_if_index (sw_if_index0);
- if (PREDICT_FALSE(ip0->ttl == 1))
- {
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
- icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
- ICMP4_time_exceeded_ttl_exceeded_in_transit,
- 0);
- next0 = SNAT_IN2OUT_NEXT_ICMP_ERROR;
- goto trace0;
- }
+ if (PREDICT_FALSE (ip0->ttl == 1))
+ {
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
+ icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
+ ICMP4_time_exceeded_ttl_exceeded_in_transit,
+ 0);
+ next0 = SNAT_IN2OUT_NEXT_ICMP_ERROR;
+ goto trace0;
+ }
- proto0 = ip_proto_to_snat_proto (ip0->protocol);
+ proto0 = ip_proto_to_snat_proto (ip0->protocol);
- if (PREDICT_FALSE (proto0 == ~0))
- goto trace0;
+ if (PREDICT_FALSE (proto0 == ~0))
+ goto trace0;
- if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
- {
- next0 = icmp_in2out(sm, b0, ip0, icmp0, sw_if_index0,
- rx_fib_index0, node, next0, ~0, 0, 0);
- goto trace0;
- }
+ if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
+ {
+ next0 = icmp_in2out (sm, b0, ip0, icmp0, sw_if_index0,
+ rx_fib_index0, node, next0, ~0, 0, 0);
+ goto trace0;
+ }
- key0.addr = ip0->src_address;
- key0.protocol = proto0;
- key0.port = udp0->src_port;
- key0.fib_index = rx_fib_index0;
+ key0.addr = ip0->src_address;
+ key0.protocol = proto0;
+ key0.port = udp0->src_port;
+ key0.fib_index = rx_fib_index0;
- if (snat_static_mapping_match(sm, key0, &sm0, 0, 0, 0, 0, 0))
- {
- b0->error = node->errors[SNAT_IN2OUT_ERROR_NO_TRANSLATION];
- next0= SNAT_IN2OUT_NEXT_DROP;
- goto trace0;
- }
+ if (snat_static_mapping_match (sm, key0, &sm0, 0, 0, 0, 0, 0))
+ {
+ b0->error = node->errors[SNAT_IN2OUT_ERROR_NO_TRANSLATION];
+ next0 = SNAT_IN2OUT_NEXT_DROP;
+ goto trace0;
+ }
- new_addr0 = sm0.addr.as_u32;
- new_port0 = sm0.port;
- vnet_buffer(b0)->sw_if_index[VLIB_TX] = sm0.fib_index;
- old_addr0 = ip0->src_address.as_u32;
- ip0->src_address.as_u32 = new_addr0;
+ new_addr0 = sm0.addr.as_u32;
+ new_port0 = sm0.port;
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = sm0.fib_index;
+ old_addr0 = ip0->src_address.as_u32;
+ ip0->src_address.as_u32 = new_addr0;
- sum0 = ip0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
- ip4_header_t,
- src_address /* changed member */);
- ip0->checksum = ip_csum_fold (sum0);
+ sum0 = ip0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
+ ip4_header_t,
+ src_address /* changed member */ );
+ ip0->checksum = ip_csum_fold (sum0);
- if (PREDICT_FALSE(new_port0 != udp0->dst_port))
- {
- if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP))
- {
- old_port0 = tcp0->src_port;
- tcp0->src_port = new_port0;
-
- sum0 = tcp0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
- ip4_header_t,
- dst_address /* changed member */);
- sum0 = ip_csum_update (sum0, old_port0, new_port0,
- ip4_header_t /* cheat */,
- length /* changed member */);
- mss_clamping (sm, tcp0, &sum0);
- tcp0->checksum = ip_csum_fold(sum0);
- }
- else
- {
- old_port0 = udp0->src_port;
- udp0->src_port = new_port0;
- udp0->checksum = 0;
- }
- }
- else
- {
- if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP))
- {
- sum0 = tcp0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
- ip4_header_t,
- dst_address /* changed member */);
- mss_clamping (sm, tcp0, &sum0);
- tcp0->checksum = ip_csum_fold(sum0);
- }
- }
+ if (PREDICT_FALSE (new_port0 != udp0->dst_port))
+ {
+ if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
+ {
+ old_port0 = tcp0->src_port;
+ tcp0->src_port = new_port0;
+
+ sum0 = tcp0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
+ ip4_header_t,
+ dst_address /* changed member */ );
+ sum0 = ip_csum_update (sum0, old_port0, new_port0,
+ ip4_header_t /* cheat */ ,
+ length /* changed member */ );
+ mss_clamping (sm, tcp0, &sum0);
+ tcp0->checksum = ip_csum_fold (sum0);
+ }
+ else
+ {
+ old_port0 = udp0->src_port;
+ udp0->src_port = new_port0;
+ udp0->checksum = 0;
+ }
+ }
+ else
+ {
+ if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
+ {
+ sum0 = tcp0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
+ ip4_header_t,
+ dst_address /* changed member */ );
+ mss_clamping (sm, tcp0, &sum0);
+ tcp0->checksum = ip_csum_fold (sum0);
+ }
+ }
- /* Hairpinning */
- snat_hairpinning (sm, b0, ip0, udp0, tcp0, proto0, 0);
+ /* Hairpinning */
+ snat_hairpinning (sm, b0, ip0, udp0, tcp0, proto0, 0);
- trace0:
- if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b0->flags & VLIB_BUFFER_IS_TRACED)))
- {
- snat_in2out_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->sw_if_index = sw_if_index0;
- t->next_index = next0;
- }
+ trace0:
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ snat_in2out_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->sw_if_index = sw_if_index0;
+ t->next_index = next0;
+ }
- pkts_processed += next0 != SNAT_IN2OUT_NEXT_DROP;
+ pkts_processed += next0 != SNAT_IN2OUT_NEXT_DROP;
- /* verify speculative enqueue, maybe switch current next frame */
+ /* verify speculative enqueue, maybe switch current next frame */
vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
to_next, n_left_to_next,
bi0, next0);
}
vlib_node_increment_counter (vm, stats_node_index,
- SNAT_IN2OUT_ERROR_IN2OUT_PACKETS,
- pkts_processed);
+ SNAT_IN2OUT_ERROR_IN2OUT_PACKETS,
+ pkts_processed);
return frame->n_vectors;
}
+/* *INDENT-OFF* */
VLIB_REGISTER_NODE (snat_in2out_fast_node) = {
.function = snat_in2out_fast_static_map_fn,
.name = "nat44-in2out-fast",
[SNAT_IN2OUT_NEXT_REASS] = "nat44-in2out-reass",
},
};
+/* *INDENT-ON* */
-VLIB_NODE_FUNCTION_MULTIARCH (snat_in2out_fast_node, snat_in2out_fast_static_map_fn);
+VLIB_NODE_FUNCTION_MULTIARCH (snat_in2out_fast_node,
+ snat_in2out_fast_static_map_fn);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
--- /dev/null
+/*
+ * Copyright (c) 2018 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/**
+ * @file
+ * @brief NAT44 endpoint-dependent inside to outside network translation
+ */
+
+#include <vlib/vlib.h>
+#include <vnet/vnet.h>
+#include <vnet/pg/pg.h>
+#include <vnet/ip/ip.h>
+#include <vnet/ethernet/ethernet.h>
+#include <vnet/fib/ip4_fib.h>
+#include <vppinfra/error.h>
+#include <nat/nat.h>
+#include <nat/nat_ipfix_logging.h>
+#include <nat/nat_reass.h>
+#include <nat/nat_inlines.h>
+
+#define foreach_nat_in2out_ed_error \
+_(UNSUPPORTED_PROTOCOL, "Unsupported protocol") \
+_(IN2OUT_PACKETS, "Good in2out packets processed") \
+_(OUT_OF_PORTS, "Out of ports") \
+_(BAD_ICMP_TYPE, "unsupported ICMP type") \
+_(MAX_SESSIONS_EXCEEDED, "Maximum sessions exceeded") \
+_(DROP_FRAGMENT, "Drop fragment") \
+_(MAX_REASS, "Maximum reassemblies exceeded") \
+_(MAX_FRAG, "Maximum fragments per reassembly exceeded")
+
+typedef enum
+{
+#define _(sym,str) NAT_IN2OUT_ED_ERROR_##sym,
+ foreach_nat_in2out_ed_error
+#undef _
+ NAT_IN2OUT_ED_N_ERROR,
+} nat_in2out_ed_error_t;
+
+static char *nat_in2out_ed_error_strings[] = {
+#define _(sym,string) string,
+ foreach_nat_in2out_ed_error
+#undef _
+};
+
+typedef enum
+{
+ NAT_IN2OUT_ED_NEXT_LOOKUP,
+ NAT_IN2OUT_ED_NEXT_DROP,
+ NAT_IN2OUT_ED_NEXT_ICMP_ERROR,
+ NAT_IN2OUT_ED_NEXT_SLOW_PATH,
+ NAT_IN2OUT_ED_NEXT_REASS,
+ NAT_IN2OUT_ED_N_NEXT,
+} nat_in2out_ed_next_t;
+
+typedef struct
+{
+ u32 sw_if_index;
+ u32 next_index;
+ u32 session_index;
+ u32 is_slow_path;
+} nat_in2out_ed_trace_t;
+
+vlib_node_registration_t nat44_ed_in2out_node;
+vlib_node_registration_t nat44_ed_in2out_slowpath_node;
+vlib_node_registration_t nat44_ed_in2out_output_node;
+vlib_node_registration_t nat44_ed_in2out_output_slowpath_node;
+vlib_node_registration_t nat44_ed_in2out_reass_node;
+
+static u8 *
+format_nat_in2out_ed_trace (u8 * s, va_list * args)
+{
+ CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
+ CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
+ nat_in2out_ed_trace_t *t = va_arg (*args, nat_in2out_ed_trace_t *);
+ char *tag;
+
+ tag =
+ t->is_slow_path ? "NAT44_IN2OUT_ED_SLOW_PATH" :
+ "NAT44_IN2OUT_ED_FAST_PATH";
+
+ s = format (s, "%s: sw_if_index %d, next index %d, session %d", tag,
+ t->sw_if_index, t->next_index, t->session_index);
+
+ return s;
+}
+
+static_always_inline int
+icmp_get_ed_key (ip4_header_t * ip0, nat_ed_ses_key_t * p_key0)
+{
+ icmp46_header_t *icmp0;
+ nat_ed_ses_key_t key0;
+ icmp_echo_header_t *echo0, *inner_echo0 = 0;
+ ip4_header_t *inner_ip0 = 0;
+ void *l4_header = 0;
+ icmp46_header_t *inner_icmp0;
+
+ icmp0 = (icmp46_header_t *) ip4_next_header (ip0);
+ echo0 = (icmp_echo_header_t *) (icmp0 + 1);
+
+ if (!icmp_is_error_message (icmp0))
+ {
+ key0.proto = IP_PROTOCOL_ICMP;
+ key0.l_addr = ip0->src_address;
+ key0.r_addr = ip0->dst_address;
+ key0.l_port = echo0->identifier;
+ key0.r_port = 0;
+ }
+ else
+ {
+ inner_ip0 = (ip4_header_t *) (echo0 + 1);
+ l4_header = ip4_next_header (inner_ip0);
+ key0.proto = inner_ip0->protocol;
+ key0.r_addr = inner_ip0->src_address;
+ key0.l_addr = inner_ip0->dst_address;
+ switch (ip_proto_to_snat_proto (inner_ip0->protocol))
+ {
+ case SNAT_PROTOCOL_ICMP:
+ inner_icmp0 = (icmp46_header_t *) l4_header;
+ inner_echo0 = (icmp_echo_header_t *) (inner_icmp0 + 1);
+ key0.r_port = 0;
+ key0.l_port = inner_echo0->identifier;
+ break;
+ case SNAT_PROTOCOL_UDP:
+ case SNAT_PROTOCOL_TCP:
+ key0.l_port = ((tcp_udp_header_t *) l4_header)->dst_port;
+ key0.r_port = ((tcp_udp_header_t *) l4_header)->src_port;
+ break;
+ default:
+ return NAT_IN2OUT_ED_ERROR_UNSUPPORTED_PROTOCOL;
+ }
+ }
+ *p_key0 = key0;
+ return 0;
+}
+
+int
+nat44_i2o_ed_is_idle_session_cb (clib_bihash_kv_16_8_t * kv, void *arg)
+{
+ snat_main_t *sm = &snat_main;
+ nat44_is_idle_session_ctx_t *ctx = arg;
+ snat_session_t *s;
+ u64 sess_timeout_time;
+ nat_ed_ses_key_t ed_key;
+ clib_bihash_kv_16_8_t ed_kv;
+ int i;
+ snat_address_t *a;
+ snat_session_key_t key;
+ snat_main_per_thread_data_t *tsm = vec_elt_at_index (sm->per_thread_data,
+ ctx->thread_index);
+
+ s = pool_elt_at_index (tsm->sessions, kv->value);
+ sess_timeout_time = s->last_heard + (f64) nat44_session_get_timeout (sm, s);
+ if (ctx->now >= sess_timeout_time)
+ {
+ if (is_fwd_bypass_session (s))
+ goto delete;
+
+ ed_key.l_addr = s->out2in.addr;
+ ed_key.r_addr = s->ext_host_addr;
+ ed_key.fib_index = s->out2in.fib_index;
+ if (snat_is_unk_proto_session (s))
+ {
+ ed_key.proto = s->in2out.port;
+ ed_key.r_port = 0;
+ ed_key.l_port = 0;
+ }
+ else
+ {
+ ed_key.proto = snat_proto_to_ip_proto (s->in2out.protocol);
+ ed_key.l_port = s->out2in.port;
+ ed_key.r_port = s->ext_host_port;
+ }
+ ed_kv.key[0] = ed_key.as_u64[0];
+ ed_kv.key[1] = ed_key.as_u64[1];
+ if (clib_bihash_add_del_16_8 (&tsm->out2in_ed, &ed_kv, 0))
+ nat_log_warn ("out2in_ed key del failed");
+
+ if (snat_is_unk_proto_session (s))
+ goto delete;
+
+ snat_ipfix_logging_nat44_ses_delete (s->in2out.addr.as_u32,
+ s->out2in.addr.as_u32,
+ s->in2out.protocol,
+ s->in2out.port,
+ s->out2in.port,
+ s->in2out.fib_index);
+
+ if (is_twice_nat_session (s))
+ {
+ for (i = 0; i < vec_len (sm->twice_nat_addresses); i++)
+ {
+ key.protocol = s->in2out.protocol;
+ key.port = s->ext_host_nat_port;
+ a = sm->twice_nat_addresses + i;
+ if (a->addr.as_u32 == s->ext_host_nat_addr.as_u32)
+ {
+ snat_free_outside_address_and_port (sm->twice_nat_addresses,
+ ctx->thread_index,
+ &key);
+ break;
+ }
+ }
+ }
+
+ if (snat_is_session_static (s))
+ goto delete;
+
+ snat_free_outside_address_and_port (sm->addresses, ctx->thread_index,
+ &s->out2in);
+ delete:
+ nat44_delete_session (sm, s, ctx->thread_index);
+ return 1;
+ }
+
+ return 0;
+}
+
+static inline u32
+icmp_in2out_ed_slow_path (snat_main_t * sm, vlib_buffer_t * b0,
+ ip4_header_t * ip0, icmp46_header_t * icmp0,
+ u32 sw_if_index0, u32 rx_fib_index0,
+ vlib_node_runtime_t * node, u32 next0, f64 now,
+ u32 thread_index, snat_session_t ** p_s0)
+{
+ next0 = icmp_in2out (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
+ next0, thread_index, p_s0, 0);
+ snat_session_t *s0 = *p_s0;
+ if (PREDICT_TRUE (next0 != NAT_IN2OUT_ED_NEXT_DROP && s0))
+ {
+ /* Hairpinning */
+ if (vnet_buffer (b0)->sw_if_index[VLIB_TX] == ~0)
+ snat_icmp_hairpinning (sm, b0, ip0, icmp0, sm->endpoint_dependent);
+ /* Accounting */
+ nat44_session_update_counters (s0, now,
+ vlib_buffer_length_in_chain
+ (sm->vlib_main, b0));
+ }
+ return next0;
+}
+
+static u32
+slow_path_ed (snat_main_t * sm,
+ vlib_buffer_t * b,
+ u32 rx_fib_index,
+ clib_bihash_kv_16_8_t * kv,
+ snat_session_t ** sessionp,
+ vlib_node_runtime_t * node, u32 next, u32 thread_index, f64 now)
+{
+ snat_session_t *s;
+ snat_user_t *u;
+ snat_session_key_t key0, key1;
+ lb_nat_type_t lb = 0, is_sm = 0;
+ snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
+ nat_ed_ses_key_t *key = (nat_ed_ses_key_t *) kv->key;
+ u32 proto = ip_proto_to_snat_proto (key->proto);
+ nat_outside_fib_t *outside_fib;
+ fib_node_index_t fei = FIB_NODE_INDEX_INVALID;
+ fib_prefix_t pfx = {
+ .fp_proto = FIB_PROTOCOL_IP4,
+ .fp_len = 32,
+ .fp_addr = {
+ .ip4.as_u32 = key->r_addr.as_u32,
+ },
+ };
+ nat44_is_idle_session_ctx_t ctx;
+
+ if (PREDICT_FALSE (maximum_sessions_exceeded (sm, thread_index)))
+ {
+ b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_SESSIONS_EXCEEDED];
+ nat_ipfix_logging_max_sessions (sm->max_translations);
+ nat_log_notice ("maximum sessions exceeded");
+ return NAT_IN2OUT_ED_NEXT_DROP;
+ }
+
+ key0.addr = key->l_addr;
+ key0.port = key->l_port;
+ key1.protocol = key0.protocol = proto;
+ key0.fib_index = rx_fib_index;
+ key1.fib_index = sm->outside_fib_index;
+ /* First try to match static mapping by local address and port */
+ if (snat_static_mapping_match (sm, key0, &key1, 0, 0, 0, &lb, 0))
+ {
+ /* Try to create dynamic translation */
+ if (snat_alloc_outside_address_and_port (sm->addresses, rx_fib_index,
+ thread_index, &key1,
+ sm->port_per_thread,
+ tsm->snat_thread_index))
+ {
+ nat_log_notice ("addresses exhausted");
+ b->error = node->errors[NAT_IN2OUT_ED_ERROR_OUT_OF_PORTS];
+ return NAT_IN2OUT_ED_NEXT_DROP;
+ }
+ }
+ else
+ is_sm = 1;
+
+ u = nat_user_get_or_create (sm, &key->l_addr, rx_fib_index, thread_index);
+ if (!u)
+ {
+ nat_log_warn ("create NAT user failed");
+ if (!is_sm)
+ snat_free_outside_address_and_port (sm->addresses,
+ thread_index, &key1);
+ return NAT_IN2OUT_ED_NEXT_DROP;
+ }
+
+ s = nat_ed_session_alloc (sm, u, thread_index);
+ if (!s)
+ {
+ nat44_delete_user_with_no_session (sm, u, thread_index);
+ nat_log_warn ("create NAT session failed");
+ if (!is_sm)
+ snat_free_outside_address_and_port (sm->addresses,
+ thread_index, &key1);
+ return NAT_IN2OUT_ED_NEXT_DROP;
+ }
+
+ user_session_increment (sm, u, is_sm);
+ if (is_sm)
+ s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING;
+ if (lb)
+ s->flags |= SNAT_SESSION_FLAG_LOAD_BALANCING;
+ s->flags |= SNAT_SESSION_FLAG_ENDPOINT_DEPENDENT;
+ s->ext_host_addr = key->r_addr;
+ s->ext_host_port = key->r_port;
+ s->in2out = key0;
+ s->out2in = key1;
+ s->out2in.protocol = key0.protocol;
+
+ switch (vec_len (sm->outside_fibs))
+ {
+ case 0:
+ s->out2in.fib_index = sm->outside_fib_index;
+ break;
+ case 1:
+ s->out2in.fib_index = sm->outside_fibs[0].fib_index;
+ break;
+ default:
+ /* *INDENT-OFF* */
+ vec_foreach (outside_fib, sm->outside_fibs)
+ {
+ fei = fib_table_lookup (outside_fib->fib_index, &pfx);
+ if (FIB_NODE_INDEX_INVALID != fei)
+ {
+ if (fib_entry_get_resolving_interface (fei) != ~0)
+ {
+ s->out2in.fib_index = outside_fib->fib_index;
+ break;
+ }
+ }
+ }
+ /* *INDENT-ON* */
+ break;
+ }
+
+ /* Add to lookup tables */
+ kv->value = s - tsm->sessions;
+ ctx.now = now;
+ ctx.thread_index = thread_index;
+ if (clib_bihash_add_or_overwrite_stale_16_8 (&tsm->in2out_ed, kv,
+ nat44_i2o_ed_is_idle_session_cb,
+ &ctx))
+ nat_log_notice ("in2out-ed key add failed");
+
+ make_ed_kv (kv, &key1.addr, &key->r_addr, key->proto, s->out2in.fib_index,
+ key1.port, key->r_port);
+ kv->value = s - tsm->sessions;
+ if (clib_bihash_add_or_overwrite_stale_16_8 (&tsm->out2in_ed, kv,
+ nat44_o2i_ed_is_idle_session_cb,
+ &ctx))
+ nat_log_notice ("out2in-ed key add failed");
+
+ *sessionp = s;
+
+ /* log NAT event */
+ snat_ipfix_logging_nat44_ses_create (s->in2out.addr.as_u32,
+ s->out2in.addr.as_u32,
+ s->in2out.protocol,
+ s->in2out.port,
+ s->out2in.port, s->in2out.fib_index);
+ return next;
+}
+
+static_always_inline int
+nat44_ed_not_translate (snat_main_t * sm, vlib_node_runtime_t * node,
+ u32 sw_if_index, ip4_header_t * ip, u32 proto,
+ u32 rx_fib_index, u32 thread_index)
+{
+ udp_header_t *udp = ip4_next_header (ip);
+ snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
+ clib_bihash_kv_16_8_t kv, value;
+ snat_session_key_t key0, key1;
+
+ make_ed_kv (&kv, &ip->dst_address, &ip->src_address, ip->protocol,
+ sm->outside_fib_index, udp->dst_port, udp->src_port);
+
+ /* NAT packet aimed at external address if */
+ /* has active sessions */
+ if (clib_bihash_search_16_8 (&tsm->out2in_ed, &kv, &value))
+ {
+ key0.addr = ip->dst_address;
+ key0.port = udp->dst_port;
+ key0.protocol = proto;
+ key0.fib_index = sm->outside_fib_index;
+ /* or is static mappings */
+ if (!snat_static_mapping_match (sm, key0, &key1, 1, 0, 0, 0, 0))
+ return 0;
+ }
+ else
+ return 0;
+
+ if (sm->forwarding_enabled)
+ return 1;
+
+ return snat_not_translate_fast (sm, node, sw_if_index, ip, proto,
+ rx_fib_index);
+}
+
+static_always_inline int
+nat_not_translate_output_feature_fwd (snat_main_t * sm, ip4_header_t * ip,
+ u32 thread_index, f64 now,
+ vlib_main_t * vm, vlib_buffer_t * b)
+{
+ nat_ed_ses_key_t key;
+ clib_bihash_kv_16_8_t kv, value;
+ udp_header_t *udp;
+ snat_session_t *s = 0;
+ snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
+
+ if (!sm->forwarding_enabled)
+ return 0;
+
+ if (ip->protocol == IP_PROTOCOL_ICMP)
+ {
+ key.as_u64[0] = key.as_u64[1] = 0;
+ if (icmp_get_ed_key (ip, &key))
+ return 0;
+ key.fib_index = 0;
+ kv.key[0] = key.as_u64[0];
+ kv.key[1] = key.as_u64[1];
+ }
+ else if (ip->protocol == IP_PROTOCOL_UDP || ip->protocol == IP_PROTOCOL_TCP)
+ {
+ udp = ip4_next_header (ip);
+ make_ed_kv (&kv, &ip->src_address, &ip->dst_address, ip->protocol, 0,
+ udp->src_port, udp->dst_port);
+ }
+ else
+ {
+ make_ed_kv (&kv, &ip->src_address, &ip->dst_address, ip->protocol, 0, 0,
+ 0);
+ }
+
+ if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &kv, &value))
+ {
+ s = pool_elt_at_index (tsm->sessions, value.value);
+ if (is_fwd_bypass_session (s))
+ {
+ if (ip->protocol == IP_PROTOCOL_TCP)
+ {
+ tcp_header_t *tcp = ip4_next_header (ip);
+ if (nat44_set_tcp_session_state_i2o (sm, s, tcp, thread_index))
+ return 1;
+ }
+ /* Accounting */
+ nat44_session_update_counters (s, now,
+ vlib_buffer_length_in_chain (vm, b));
+ return 1;
+ }
+ else
+ return 0;
+ }
+
+ return 0;
+}
+
+static_always_inline int
+nat44_ed_not_translate_output_feature (snat_main_t * sm, ip4_header_t * ip,
+ u8 proto, u16 src_port, u16 dst_port,
+ u32 thread_index, u32 rx_sw_if_index,
+ u32 tx_sw_if_index)
+{
+ clib_bihash_kv_16_8_t kv, value;
+ snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
+ snat_interface_t *i;
+ snat_session_t *s;
+ u32 rx_fib_index = ip4_fib_table_get_index_for_sw_if_index (rx_sw_if_index);
+ u32 tx_fib_index = ip4_fib_table_get_index_for_sw_if_index (tx_sw_if_index);
+
+ /* src NAT check */
+ make_ed_kv (&kv, &ip->src_address, &ip->dst_address, proto, tx_fib_index,
+ src_port, dst_port);
+ if (!clib_bihash_search_16_8 (&tsm->out2in_ed, &kv, &value))
+ return 1;
+
+ /* dst NAT check */
+ make_ed_kv (&kv, &ip->dst_address, &ip->src_address, proto, rx_fib_index,
+ dst_port, src_port);
+ if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &kv, &value))
+ {
+ s = pool_elt_at_index (tsm->sessions, value.value);
+ if (is_fwd_bypass_session (s))
+ return 0;
+
+ /* hairpinning */
+ /* *INDENT-OFF* */
+ pool_foreach (i, sm->output_feature_interfaces,
+ ({
+ if ((nat_interface_is_inside (i)) && (rx_sw_if_index == i->sw_if_index))
+ return 0;
+ }));
+ /* *INDENT-ON* */
+ return 1;
+ }
+
+ return 0;
+}
+
+u32
+icmp_match_in2out_ed (snat_main_t * sm, vlib_node_runtime_t * node,
+ u32 thread_index, vlib_buffer_t * b, ip4_header_t * ip,
+ u8 * p_proto, snat_session_key_t * p_value,
+ u8 * p_dont_translate, void *d, void *e)
+{
+ icmp46_header_t *icmp;
+ u32 sw_if_index;
+ u32 rx_fib_index;
+ nat_ed_ses_key_t key;
+ snat_session_t *s = 0;
+ u8 dont_translate = 0;
+ clib_bihash_kv_16_8_t kv, value;
+ u32 next = ~0;
+ int err;
+ snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
+
+ icmp = (icmp46_header_t *) ip4_next_header (ip);
+ sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_RX];
+ rx_fib_index = ip4_fib_table_get_index_for_sw_if_index (sw_if_index);
+
+ key.as_u64[0] = key.as_u64[1] = 0;
+ err = icmp_get_ed_key (ip, &key);
+ if (err != 0)
+ {
+ b->error = node->errors[err];
+ next = NAT_IN2OUT_ED_NEXT_DROP;
+ goto out;
+ }
+ key.fib_index = rx_fib_index;
+
+ kv.key[0] = key.as_u64[0];
+ kv.key[1] = key.as_u64[1];
+
+ if (clib_bihash_search_16_8 (&tsm->in2out_ed, &kv, &value))
+ {
+ if (vnet_buffer (b)->sw_if_index[VLIB_TX] != ~0)
+ {
+ if (PREDICT_FALSE (nat44_ed_not_translate_output_feature (sm, ip,
+ key.proto,
+ key.
+ l_port,
+ key.
+ r_port,
+ thread_index,
+ sw_if_index,
+ vnet_buffer
+ (b)->
+ sw_if_index
+ [VLIB_TX])))
+ {
+ dont_translate = 1;
+ goto out;
+ }
+ }
+ else
+ {
+ if (PREDICT_FALSE (nat44_ed_not_translate (sm, node, sw_if_index,
+ ip, SNAT_PROTOCOL_ICMP,
+ rx_fib_index,
+ thread_index)))
+ {
+ dont_translate = 1;
+ goto out;
+ }
+ }
+
+ if (PREDICT_FALSE (icmp_is_error_message (icmp)))
+ {
+ b->error = node->errors[NAT_IN2OUT_ED_ERROR_BAD_ICMP_TYPE];
+ next = NAT_IN2OUT_ED_NEXT_DROP;
+ goto out;
+ }
+
+ next = slow_path_ed (sm, b, rx_fib_index, &kv, &s, node, next,
+ thread_index, vlib_time_now (sm->vlib_main));
+
+ if (PREDICT_FALSE (next == NAT_IN2OUT_ED_NEXT_DROP))
+ goto out;
+ }
+ else
+ {
+ if (PREDICT_FALSE (icmp->type != ICMP4_echo_request &&
+ icmp->type != ICMP4_echo_reply &&
+ !icmp_is_error_message (icmp)))
+ {
+ b->error = node->errors[NAT_IN2OUT_ED_ERROR_BAD_ICMP_TYPE];
+ next = NAT_IN2OUT_ED_NEXT_DROP;
+ goto out;
+ }
+
+ s = pool_elt_at_index (tsm->sessions, value.value);
+ }
+
+ *p_proto = ip_proto_to_snat_proto (key.proto);
+out:
+ if (s)
+ *p_value = s->out2in;
+ *p_dont_translate = dont_translate;
+ if (d)
+ *(snat_session_t **) d = s;
+ return next;
+}
+
+static snat_session_t *
+nat44_ed_in2out_unknown_proto (snat_main_t * sm,
+ vlib_buffer_t * b,
+ ip4_header_t * ip,
+ u32 rx_fib_index,
+ u32 thread_index,
+ f64 now,
+ vlib_main_t * vm, vlib_node_runtime_t * node)
+{
+ clib_bihash_kv_8_8_t kv, value;
+ clib_bihash_kv_16_8_t s_kv, s_value;
+ snat_static_mapping_t *m;
+ u32 old_addr, new_addr = 0;
+ ip_csum_t sum;
+ snat_user_t *u;
+ dlist_elt_t *head, *elt;
+ snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
+ u32 elt_index, head_index, ses_index;
+ snat_session_t *s;
+ u32 outside_fib_index = sm->outside_fib_index;
+ int i;
+ u8 is_sm = 0;
+ nat_outside_fib_t *outside_fib;
+ fib_node_index_t fei = FIB_NODE_INDEX_INVALID;
+ fib_prefix_t pfx = {
+ .fp_proto = FIB_PROTOCOL_IP4,
+ .fp_len = 32,
+ .fp_addr = {
+ .ip4.as_u32 = ip->dst_address.as_u32,
+ },
+ };
+
+ switch (vec_len (sm->outside_fibs))
+ {
+ case 0:
+ outside_fib_index = sm->outside_fib_index;
+ break;
+ case 1:
+ outside_fib_index = sm->outside_fibs[0].fib_index;
+ break;
+ default:
+ /* *INDENT-OFF* */
+ vec_foreach (outside_fib, sm->outside_fibs)
+ {
+ fei = fib_table_lookup (outside_fib->fib_index, &pfx);
+ if (FIB_NODE_INDEX_INVALID != fei)
+ {
+ if (fib_entry_get_resolving_interface (fei) != ~0)
+ {
+ outside_fib_index = outside_fib->fib_index;
+ break;
+ }
+ }
+ }
+ /* *INDENT-ON* */
+ break;
+ }
+ old_addr = ip->src_address.as_u32;
+
+ make_ed_kv (&s_kv, &ip->src_address, &ip->dst_address, ip->protocol,
+ rx_fib_index, 0, 0);
+
+ if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &s_kv, &s_value))
+ {
+ s = pool_elt_at_index (tsm->sessions, s_value.value);
+ new_addr = ip->src_address.as_u32 = s->out2in.addr.as_u32;
+ }
+ else
+ {
+ if (PREDICT_FALSE (maximum_sessions_exceeded (sm, thread_index)))
+ {
+ b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_SESSIONS_EXCEEDED];
+ nat_ipfix_logging_max_sessions (sm->max_translations);
+ nat_log_notice ("maximum sessions exceeded");
+ return 0;
+ }
+
+ u = nat_user_get_or_create (sm, &ip->src_address, rx_fib_index,
+ thread_index);
+ if (!u)
+ {
+ nat_log_warn ("create NAT user failed");
+ return 0;
+ }
+
+ make_sm_kv (&kv, &ip->src_address, 0, rx_fib_index, 0);
+
+ /* Try to find static mapping first */
+ if (!clib_bihash_search_8_8 (&sm->static_mapping_by_local, &kv, &value))
+ {
+ m = pool_elt_at_index (sm->static_mappings, value.value);
+ new_addr = ip->src_address.as_u32 = m->external_addr.as_u32;
+ is_sm = 1;
+ goto create_ses;
+ }
+ /* Fallback to 3-tuple key */
+ else
+ {
+ /* Choose same out address as for TCP/UDP session to same destination */
+ head_index = u->sessions_per_user_list_head_index;
+ head = pool_elt_at_index (tsm->list_pool, head_index);
+ elt_index = head->next;
+ if (PREDICT_FALSE (elt_index == ~0))
+ ses_index = ~0;
+ else
+ {
+ elt = pool_elt_at_index (tsm->list_pool, elt_index);
+ ses_index = elt->value;
+ }
+
+ while (ses_index != ~0)
+ {
+ s = pool_elt_at_index (tsm->sessions, ses_index);
+ elt_index = elt->next;
+ elt = pool_elt_at_index (tsm->list_pool, elt_index);
+ ses_index = elt->value;
+
+ if (s->ext_host_addr.as_u32 == ip->dst_address.as_u32)
+ {
+ new_addr = ip->src_address.as_u32 = s->out2in.addr.as_u32;
+
+ make_ed_kv (&s_kv, &s->out2in.addr, &ip->dst_address,
+ ip->protocol, outside_fib_index, 0, 0);
+ if (clib_bihash_search_16_8
+ (&tsm->out2in_ed, &s_kv, &s_value))
+ goto create_ses;
+
+ break;
+ }
+ }
+
+ for (i = 0; i < vec_len (sm->addresses); i++)
+ {
+ make_ed_kv (&s_kv, &sm->addresses[i].addr, &ip->dst_address,
+ ip->protocol, outside_fib_index, 0, 0);
+ if (clib_bihash_search_16_8 (&tsm->out2in_ed, &s_kv, &s_value))
+ {
+ new_addr = ip->src_address.as_u32 =
+ sm->addresses[i].addr.as_u32;
+ goto create_ses;
+ }
+ }
+ return 0;
+ }
+
+ create_ses:
+ s = nat_ed_session_alloc (sm, u, thread_index);
+ if (!s)
+ {
+ nat44_delete_user_with_no_session (sm, u, thread_index);
+ nat_log_warn ("create NAT session failed");
+ return 0;
+ }
+
+ s->ext_host_addr.as_u32 = ip->dst_address.as_u32;
+ s->flags |= SNAT_SESSION_FLAG_UNKNOWN_PROTO;
+ s->flags |= SNAT_SESSION_FLAG_ENDPOINT_DEPENDENT;
+ s->out2in.addr.as_u32 = new_addr;
+ s->out2in.fib_index = outside_fib_index;
+ s->in2out.addr.as_u32 = old_addr;
+ s->in2out.fib_index = rx_fib_index;
+ s->in2out.port = s->out2in.port = ip->protocol;
+ if (is_sm)
+ s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING;
+ user_session_increment (sm, u, is_sm);
+
+ /* Add to lookup tables */
+ make_ed_kv (&s_kv, &s->in2out.addr, &ip->dst_address, ip->protocol,
+ rx_fib_index, 0, 0);
+ s_kv.value = s - tsm->sessions;
+ if (clib_bihash_add_del_16_8 (&tsm->in2out_ed, &s_kv, 1))
+ nat_log_notice ("in2out key add failed");
+
+ make_ed_kv (&s_kv, &s->out2in.addr, &ip->dst_address, ip->protocol,
+ outside_fib_index, 0, 0);
+ s_kv.value = s - tsm->sessions;
+ if (clib_bihash_add_del_16_8 (&tsm->out2in_ed, &s_kv, 1))
+ nat_log_notice ("out2in key add failed");
+ }
+
+ /* Update IP checksum */
+ sum = ip->checksum;
+ sum = ip_csum_update (sum, old_addr, new_addr, ip4_header_t, src_address);
+ ip->checksum = ip_csum_fold (sum);
+
+ /* Accounting */
+ nat44_session_update_counters (s, now, vlib_buffer_length_in_chain (vm, b));
+
+ /* Hairpinning */
+ if (vnet_buffer (b)->sw_if_index[VLIB_TX] == ~0)
+ nat44_ed_hairpinning_unknown_proto (sm, b, ip);
+
+ if (vnet_buffer (b)->sw_if_index[VLIB_TX] == ~0)
+ vnet_buffer (b)->sw_if_index[VLIB_TX] = outside_fib_index;
+
+ return s;
+}
+
+static inline uword
+nat44_ed_in2out_node_fn_inline (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame, int is_slow_path,
+ int is_output_feature)
+{
+ u32 n_left_from, *from, *to_next, pkts_processed = 0, stats_node_index;
+ nat_in2out_ed_next_t next_index;
+ snat_main_t *sm = &snat_main;
+ f64 now = vlib_time_now (vm);
+ u32 thread_index = vm->thread_index;
+ snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
+
+ stats_node_index = is_slow_path ? nat44_ed_in2out_slowpath_node.index :
+ nat44_ed_in2out_node.index;
+
+ from = vlib_frame_vector_args (frame);
+ n_left_from = frame->n_vectors;
+ next_index = node->cached_next_index;
+
+ while (n_left_from > 0)
+ {
+ u32 n_left_to_next;
+
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+ while (n_left_from >= 4 && n_left_to_next >= 2)
+ {
+ u32 bi0, bi1;
+ vlib_buffer_t *b0, *b1;
+ u32 next0, sw_if_index0, rx_fib_index0, iph_offset0 = 0, proto0,
+ new_addr0, old_addr0;
+ u32 next1, sw_if_index1, rx_fib_index1, iph_offset1 = 0, proto1,
+ new_addr1, old_addr1;
+ u16 old_port0, new_port0, old_port1, new_port1;
+ ip4_header_t *ip0, *ip1;
+ udp_header_t *udp0, *udp1;
+ tcp_header_t *tcp0, *tcp1;
+ icmp46_header_t *icmp0, *icmp1;
+ snat_session_t *s0 = 0, *s1 = 0;
+ clib_bihash_kv_16_8_t kv0, value0, kv1, value1;
+ ip_csum_t sum0, sum1;
+
+ /* Prefetch next iteration. */
+ {
+ vlib_buffer_t *p2, *p3;
+
+ p2 = vlib_get_buffer (vm, from[2]);
+ p3 = vlib_get_buffer (vm, from[3]);
+
+ vlib_prefetch_buffer_header (p2, LOAD);
+ vlib_prefetch_buffer_header (p3, LOAD);
+
+ CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, STORE);
+ CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, STORE);
+ }
+
+ /* speculatively enqueue b0 and b1 to the current next frame */
+ to_next[0] = bi0 = from[0];
+ to_next[1] = bi1 = from[1];
+ from += 2;
+ to_next += 2;
+ n_left_from -= 2;
+ n_left_to_next -= 2;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ b1 = vlib_get_buffer (vm, bi1);
+
+ next0 = NAT_IN2OUT_ED_NEXT_LOOKUP;
+
+ if (is_output_feature)
+ iph_offset0 = vnet_buffer (b0)->ip.save_rewrite_length;
+
+ ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) +
+ iph_offset0);
+
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+ rx_fib_index0 =
+ fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
+ sw_if_index0);
+
+ if (PREDICT_FALSE (ip0->ttl == 1))
+ {
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
+ icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
+ ICMP4_time_exceeded_ttl_exceeded_in_transit,
+ 0);
+ next0 = NAT_IN2OUT_ED_NEXT_ICMP_ERROR;
+ goto trace00;
+ }
+
+ udp0 = ip4_next_header (ip0);
+ tcp0 = (tcp_header_t *) udp0;
+ icmp0 = (icmp46_header_t *) udp0;
+ proto0 = ip_proto_to_snat_proto (ip0->protocol);
+
+ if (is_slow_path)
+ {
+ if (PREDICT_FALSE (proto0 == ~0))
+ {
+ s0 = nat44_ed_in2out_unknown_proto (sm, b0, ip0,
+ rx_fib_index0,
+ thread_index, now, vm,
+ node);
+ if (!s0)
+ next0 = NAT_IN2OUT_ED_NEXT_DROP;
+ goto trace00;
+ }
+
+ if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
+ {
+ next0 = icmp_in2out_ed_slow_path
+ (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
+ next0, now, thread_index, &s0);
+ goto trace00;
+ }
+ }
+ else
+ {
+ if (PREDICT_FALSE (proto0 == ~0))
+ {
+ next0 = NAT_IN2OUT_ED_NEXT_SLOW_PATH;
+ goto trace00;
+ }
+
+ if (ip4_is_fragment (ip0))
+ {
+ next0 = NAT_IN2OUT_ED_NEXT_REASS;
+ goto trace00;
+ }
+
+ if (is_output_feature)
+ {
+ if (PREDICT_FALSE
+ (nat_not_translate_output_feature_fwd
+ (sm, ip0, thread_index, now, vm, b0)))
+ goto trace00;
+ }
+
+ if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
+ {
+ next0 = NAT_IN2OUT_ED_NEXT_SLOW_PATH;
+ goto trace00;
+ }
+ }
+
+ make_ed_kv (&kv0, &ip0->src_address, &ip0->dst_address,
+ ip0->protocol, rx_fib_index0, udp0->src_port,
+ udp0->dst_port);
+
+ if (clib_bihash_search_16_8 (&tsm->in2out_ed, &kv0, &value0))
+ {
+ if (is_slow_path)
+ {
+ if (is_output_feature)
+ {
+ if (PREDICT_FALSE
+ (nat44_ed_not_translate_output_feature
+ (sm, ip0, ip0->protocol, udp0->src_port,
+ udp0->dst_port, thread_index, sw_if_index0,
+ vnet_buffer (b0)->sw_if_index[VLIB_TX])))
+ goto trace00;
+ }
+ else
+ {
+ if (PREDICT_FALSE (nat44_ed_not_translate (sm, node,
+ sw_if_index0,
+ ip0, proto0,
+ rx_fib_index0,
+ thread_index)))
+ goto trace00;
+ }
+
+ next0 =
+ slow_path_ed (sm, b0, rx_fib_index0, &kv0, &s0, node,
+ next0, thread_index, now);
+
+ if (PREDICT_FALSE (next0 == NAT_IN2OUT_ED_NEXT_DROP))
+ goto trace00;
+ }
+ else
+ {
+ next0 = NAT_IN2OUT_ED_NEXT_SLOW_PATH;
+ goto trace00;
+ }
+ }
+ else
+ {
+ s0 = pool_elt_at_index (tsm->sessions, value0.value);
+ }
+
+ b0->flags |= VNET_BUFFER_F_IS_NATED;
+
+ if (!is_output_feature)
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index;
+
+ old_addr0 = ip0->src_address.as_u32;
+ new_addr0 = ip0->src_address.as_u32 = s0->out2in.addr.as_u32;
+ sum0 = ip0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
+ src_address);
+ if (PREDICT_FALSE (is_twice_nat_session (s0)))
+ sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32,
+ s0->ext_host_addr.as_u32, ip4_header_t,
+ dst_address);
+ ip0->checksum = ip_csum_fold (sum0);
+
+ if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
+ {
+ old_port0 = tcp0->src_port;
+ new_port0 = tcp0->src_port = s0->out2in.port;
+
+ sum0 = tcp0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
+ dst_address);
+ sum0 = ip_csum_update (sum0, old_port0, new_port0, ip4_header_t,
+ length);
+ if (PREDICT_FALSE (is_twice_nat_session (s0)))
+ {
+ sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32,
+ s0->ext_host_addr.as_u32,
+ ip4_header_t, dst_address);
+ sum0 = ip_csum_update (sum0, tcp0->dst_port,
+ s0->ext_host_port, ip4_header_t,
+ length);
+ tcp0->dst_port = s0->ext_host_port;
+ ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
+ }
+ mss_clamping (sm, tcp0, &sum0);
+ tcp0->checksum = ip_csum_fold (sum0);
+ if (nat44_set_tcp_session_state_i2o
+ (sm, s0, tcp0, thread_index))
+ goto trace00;
+ }
+ else
+ {
+ udp0->src_port = s0->out2in.port;
+ udp0->checksum = 0;
+ if (PREDICT_FALSE (is_twice_nat_session (s0)))
+ {
+ udp0->dst_port = s0->ext_host_port;
+ ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
+ }
+ }
+
+ /* Accounting */
+ nat44_session_update_counters (s0, now,
+ vlib_buffer_length_in_chain (vm,
+ b0));
+
+ trace00:
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ nat_in2out_ed_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->is_slow_path = is_slow_path;
+ t->sw_if_index = sw_if_index0;
+ t->next_index = next0;
+ t->session_index = ~0;
+ if (s0)
+ t->session_index = s0 - tsm->sessions;
+ }
+
+ pkts_processed += next0 != NAT_IN2OUT_ED_NEXT_DROP;
+
+
+ next1 = NAT_IN2OUT_ED_NEXT_LOOKUP;
+
+ if (is_output_feature)
+ iph_offset1 = vnet_buffer (b1)->ip.save_rewrite_length;
+
+ ip1 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b1) +
+ iph_offset1);
+
+ sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX];
+ rx_fib_index1 =
+ fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
+ sw_if_index1);
+
+ if (PREDICT_FALSE (ip1->ttl == 1))
+ {
+ vnet_buffer (b1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
+ icmp4_error_set_vnet_buffer (b1, ICMP4_time_exceeded,
+ ICMP4_time_exceeded_ttl_exceeded_in_transit,
+ 0);
+ next1 = NAT_IN2OUT_ED_NEXT_ICMP_ERROR;
+ goto trace01;
+ }
+
+ udp1 = ip4_next_header (ip1);
+ tcp1 = (tcp_header_t *) udp1;
+ icmp1 = (icmp46_header_t *) udp1;
+ proto1 = ip_proto_to_snat_proto (ip1->protocol);
+
+ if (is_slow_path)
+ {
+ if (PREDICT_FALSE (proto1 == ~0))
+ {
+ s1 = nat44_ed_in2out_unknown_proto (sm, b1, ip1,
+ rx_fib_index1,
+ thread_index, now, vm,
+ node);
+ if (!s1)
+ next1 = NAT_IN2OUT_ED_NEXT_DROP;
+ goto trace01;
+ }
+
+ if (PREDICT_FALSE (proto1 == SNAT_PROTOCOL_ICMP))
+ {
+ next1 = icmp_in2out_ed_slow_path
+ (sm, b1, ip1, icmp1, sw_if_index1, rx_fib_index1, node,
+ next1, now, thread_index, &s1);
+ goto trace01;
+ }
+ }
+ else
+ {
+ if (PREDICT_FALSE (proto1 == ~0))
+ {
+ next1 = NAT_IN2OUT_ED_NEXT_SLOW_PATH;
+ goto trace01;
+ }
+
+ if (ip4_is_fragment (ip1))
+ {
+ next1 = NAT_IN2OUT_ED_NEXT_REASS;
+ goto trace01;
+ }
+
+ if (is_output_feature)
+ {
+ if (PREDICT_FALSE
+ (nat_not_translate_output_feature_fwd
+ (sm, ip1, thread_index, now, vm, b1)))
+ goto trace01;
+ }
+
+ if (PREDICT_FALSE (proto1 == SNAT_PROTOCOL_ICMP))
+ {
+ next1 = NAT_IN2OUT_ED_NEXT_SLOW_PATH;
+ goto trace01;
+ }
+ }
+
+ make_ed_kv (&kv1, &ip1->src_address, &ip1->dst_address,
+ ip1->protocol, rx_fib_index1, udp1->src_port,
+ udp1->dst_port);
+
+ if (clib_bihash_search_16_8 (&tsm->in2out_ed, &kv1, &value1))
+ {
+ if (is_slow_path)
+ {
+ if (is_output_feature)
+ {
+ if (PREDICT_FALSE
+ (nat44_ed_not_translate_output_feature
+ (sm, ip1, ip1->protocol, udp1->src_port,
+ udp1->dst_port, thread_index, sw_if_index1,
+ vnet_buffer (b1)->sw_if_index[VLIB_TX])))
+ goto trace01;
+ }
+ else
+ {
+ if (PREDICT_FALSE (nat44_ed_not_translate (sm, node,
+ sw_if_index1,
+ ip1, proto1,
+ rx_fib_index1,
+ thread_index)))
+ goto trace01;
+ }
+
+ next1 =
+ slow_path_ed (sm, b1, rx_fib_index1, &kv1, &s1, node,
+ next1, thread_index, now);
+
+ if (PREDICT_FALSE (next1 == NAT_IN2OUT_ED_NEXT_DROP))
+ goto trace01;
+ }
+ else
+ {
+ next1 = NAT_IN2OUT_ED_NEXT_SLOW_PATH;
+ goto trace01;
+ }
+ }
+ else
+ {
+ s1 = pool_elt_at_index (tsm->sessions, value1.value);
+ }
+
+ b1->flags |= VNET_BUFFER_F_IS_NATED;
+
+ if (!is_output_feature)
+ vnet_buffer (b1)->sw_if_index[VLIB_TX] = s1->out2in.fib_index;
+
+ old_addr1 = ip1->src_address.as_u32;
+ new_addr1 = ip1->src_address.as_u32 = s1->out2in.addr.as_u32;
+ sum1 = ip1->checksum;
+ sum1 = ip_csum_update (sum1, old_addr1, new_addr1, ip4_header_t,
+ src_address);
+ if (PREDICT_FALSE (is_twice_nat_session (s1)))
+ sum1 = ip_csum_update (sum1, ip1->dst_address.as_u32,
+ s1->ext_host_addr.as_u32, ip4_header_t,
+ dst_address);
+ ip1->checksum = ip_csum_fold (sum1);
+
+ if (PREDICT_TRUE (proto1 == SNAT_PROTOCOL_TCP))
+ {
+ old_port1 = tcp1->src_port;
+ new_port1 = tcp1->src_port = s1->out2in.port;
+
+ sum1 = tcp1->checksum;
+ sum1 = ip_csum_update (sum1, old_addr1, new_addr1, ip4_header_t,
+ dst_address);
+ sum1 = ip_csum_update (sum1, old_port1, new_port1, ip4_header_t,
+ length);
+ if (PREDICT_FALSE (is_twice_nat_session (s1)))
+ {
+ sum1 = ip_csum_update (sum1, ip1->dst_address.as_u32,
+ s1->ext_host_addr.as_u32,
+ ip4_header_t, dst_address);
+ sum1 = ip_csum_update (sum1, tcp1->dst_port,
+ s1->ext_host_port, ip4_header_t,
+ length);
+ tcp1->dst_port = s1->ext_host_port;
+ ip1->dst_address.as_u32 = s1->ext_host_addr.as_u32;
+ }
+ tcp1->checksum = ip_csum_fold (sum1);
+ mss_clamping (sm, tcp1, &sum1);
+ if (nat44_set_tcp_session_state_i2o
+ (sm, s1, tcp1, thread_index))
+ goto trace01;
+ }
+ else
+ {
+ udp1->src_port = s1->out2in.port;
+ udp1->checksum = 0;
+ if (PREDICT_FALSE (is_twice_nat_session (s1)))
+ {
+ udp1->dst_port = s1->ext_host_port;
+ ip1->dst_address.as_u32 = s1->ext_host_addr.as_u32;
+ }
+ }
+
+ /* Accounting */
+ nat44_session_update_counters (s1, now,
+ vlib_buffer_length_in_chain (vm,
+ b1));
+
+ trace01:
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b1->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ nat_in2out_ed_trace_t *t =
+ vlib_add_trace (vm, node, b1, sizeof (*t));
+ t->is_slow_path = is_slow_path;
+ t->sw_if_index = sw_if_index1;
+ t->next_index = next1;
+ t->session_index = ~0;
+ if (s1)
+ t->session_index = s1 - tsm->sessions;
+ }
+
+ pkts_processed += next1 != NAT_IN2OUT_ED_NEXT_DROP;
+
+ /* verify speculative enqueues, maybe switch current next frame */
+ vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
+ to_next, n_left_to_next,
+ bi0, bi1, next0, next1);
+ }
+
+ while (n_left_from > 0 && n_left_to_next > 0)
+ {
+ u32 bi0;
+ vlib_buffer_t *b0;
+ u32 next0, sw_if_index0, rx_fib_index0, iph_offset0 = 0, proto0,
+ new_addr0, old_addr0;
+ u16 old_port0, new_port0;
+ ip4_header_t *ip0;
+ udp_header_t *udp0;
+ tcp_header_t *tcp0;
+ icmp46_header_t *icmp0;
+ snat_session_t *s0 = 0;
+ clib_bihash_kv_16_8_t kv0, value0;
+ ip_csum_t sum0;
+
+ /* speculatively enqueue b0 to the current next frame */
+ bi0 = from[0];
+ to_next[0] = bi0;
+ from += 1;
+ to_next += 1;
+ n_left_from -= 1;
+ n_left_to_next -= 1;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ next0 = NAT_IN2OUT_ED_NEXT_LOOKUP;
+
+ if (is_output_feature)
+ iph_offset0 = vnet_buffer (b0)->ip.save_rewrite_length;
+
+ ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) +
+ iph_offset0);
+
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+ rx_fib_index0 =
+ fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
+ sw_if_index0);
+
+ if (PREDICT_FALSE (ip0->ttl == 1))
+ {
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
+ icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
+ ICMP4_time_exceeded_ttl_exceeded_in_transit,
+ 0);
+ next0 = NAT_IN2OUT_ED_NEXT_ICMP_ERROR;
+ goto trace0;
+ }
+
+ udp0 = ip4_next_header (ip0);
+ tcp0 = (tcp_header_t *) udp0;
+ icmp0 = (icmp46_header_t *) udp0;
+ proto0 = ip_proto_to_snat_proto (ip0->protocol);
+
+ if (is_slow_path)
+ {
+ if (PREDICT_FALSE (proto0 == ~0))
+ {
+ s0 = nat44_ed_in2out_unknown_proto (sm, b0, ip0,
+ rx_fib_index0,
+ thread_index, now, vm,
+ node);
+ if (!s0)
+ next0 = NAT_IN2OUT_ED_NEXT_DROP;
+ goto trace0;
+ }
+
+ if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
+ {
+ next0 = icmp_in2out_ed_slow_path
+ (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
+ next0, now, thread_index, &s0);
+ goto trace0;
+ }
+ }
+ else
+ {
+ if (PREDICT_FALSE (proto0 == ~0))
+ {
+ next0 = NAT_IN2OUT_ED_NEXT_SLOW_PATH;
+ goto trace0;
+ }
+
+ if (ip4_is_fragment (ip0))
+ {
+ next0 = NAT_IN2OUT_ED_NEXT_REASS;
+ goto trace0;
+ }
+
+ if (is_output_feature)
+ {
+ if (PREDICT_FALSE
+ (nat_not_translate_output_feature_fwd
+ (sm, ip0, thread_index, now, vm, b0)))
+ goto trace0;
+ }
+
+ if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
+ {
+ next0 = NAT_IN2OUT_ED_NEXT_SLOW_PATH;
+ goto trace0;
+ }
+ }
+
+ make_ed_kv (&kv0, &ip0->src_address, &ip0->dst_address,
+ ip0->protocol, rx_fib_index0, udp0->src_port,
+ udp0->dst_port);
+
+ if (clib_bihash_search_16_8 (&tsm->in2out_ed, &kv0, &value0))
+ {
+ if (is_slow_path)
+ {
+ if (is_output_feature)
+ {
+ if (PREDICT_FALSE
+ (nat44_ed_not_translate_output_feature
+ (sm, ip0, ip0->protocol, udp0->src_port,
+ udp0->dst_port, thread_index, sw_if_index0,
+ vnet_buffer (b0)->sw_if_index[VLIB_TX])))
+ goto trace0;
+ }
+ else
+ {
+ if (PREDICT_FALSE (nat44_ed_not_translate (sm, node,
+ sw_if_index0,
+ ip0, proto0,
+ rx_fib_index0,
+ thread_index)))
+ goto trace0;
+ }
+
+ next0 =
+ slow_path_ed (sm, b0, rx_fib_index0, &kv0, &s0, node,
+ next0, thread_index, now);
+
+ if (PREDICT_FALSE (next0 == NAT_IN2OUT_ED_NEXT_DROP))
+ goto trace0;
+ }
+ else
+ {
+ next0 = NAT_IN2OUT_ED_NEXT_SLOW_PATH;
+ goto trace0;
+ }
+ }
+ else
+ {
+ s0 = pool_elt_at_index (tsm->sessions, value0.value);
+ }
+
+ b0->flags |= VNET_BUFFER_F_IS_NATED;
+
+ if (!is_output_feature)
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index;
+
+ old_addr0 = ip0->src_address.as_u32;
+ new_addr0 = ip0->src_address.as_u32 = s0->out2in.addr.as_u32;
+ sum0 = ip0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
+ src_address);
+ if (PREDICT_FALSE (is_twice_nat_session (s0)))
+ sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32,
+ s0->ext_host_addr.as_u32, ip4_header_t,
+ dst_address);
+ ip0->checksum = ip_csum_fold (sum0);
+
+ if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
+ {
+ old_port0 = tcp0->src_port;
+ new_port0 = tcp0->src_port = s0->out2in.port;
+
+ sum0 = tcp0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
+ dst_address);
+ sum0 = ip_csum_update (sum0, old_port0, new_port0, ip4_header_t,
+ length);
+ if (PREDICT_FALSE (is_twice_nat_session (s0)))
+ {
+ sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32,
+ s0->ext_host_addr.as_u32,
+ ip4_header_t, dst_address);
+ sum0 = ip_csum_update (sum0, tcp0->dst_port,
+ s0->ext_host_port, ip4_header_t,
+ length);
+ tcp0->dst_port = s0->ext_host_port;
+ ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
+ }
+ mss_clamping (sm, tcp0, &sum0);
+ tcp0->checksum = ip_csum_fold (sum0);
+ if (nat44_set_tcp_session_state_i2o
+ (sm, s0, tcp0, thread_index))
+ goto trace0;
+ }
+ else
+ {
+ udp0->src_port = s0->out2in.port;
+ udp0->checksum = 0;
+ if (PREDICT_FALSE (is_twice_nat_session (s0)))
+ {
+ udp0->dst_port = s0->ext_host_port;
+ ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
+ }
+ }
+
+ /* Accounting */
+ nat44_session_update_counters (s0, now,
+ vlib_buffer_length_in_chain (vm,
+ b0));
+
+ trace0:
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ nat_in2out_ed_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->is_slow_path = is_slow_path;
+ t->sw_if_index = sw_if_index0;
+ t->next_index = next0;
+ t->session_index = ~0;
+ if (s0)
+ t->session_index = s0 - tsm->sessions;
+ }
+
+ pkts_processed += next0 != NAT_IN2OUT_ED_NEXT_DROP;
+
+ /* verify speculative enqueue, maybe switch current next frame */
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
+ to_next, n_left_to_next,
+ bi0, next0);
+ }
+
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
+
+ vlib_node_increment_counter (vm, stats_node_index,
+ NAT_IN2OUT_ED_ERROR_IN2OUT_PACKETS,
+ pkts_processed);
+ return frame->n_vectors;
+}
+
+static uword
+nat44_ed_in2out_fast_path_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ return nat44_ed_in2out_node_fn_inline (vm, node, frame, 0, 0);
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (nat44_ed_in2out_node) = {
+ .function = nat44_ed_in2out_fast_path_fn,
+ .name = "nat44-ed-in2out",
+ .vector_size = sizeof (u32),
+ .format_trace = format_nat_in2out_ed_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .n_errors = ARRAY_LEN (nat_in2out_ed_error_strings),
+ .error_strings = nat_in2out_ed_error_strings,
+ .runtime_data_bytes = sizeof (snat_runtime_t),
+ .n_next_nodes = NAT_IN2OUT_ED_N_NEXT,
+ .next_nodes = {
+ [NAT_IN2OUT_ED_NEXT_DROP] = "error-drop",
+ [NAT_IN2OUT_ED_NEXT_LOOKUP] = "ip4-lookup",
+ [NAT_IN2OUT_ED_NEXT_SLOW_PATH] = "nat44-ed-in2out-slowpath",
+ [NAT_IN2OUT_ED_NEXT_ICMP_ERROR] = "ip4-icmp-error",
+ [NAT_IN2OUT_ED_NEXT_REASS] = "nat44-ed-in2out-reass",
+ },
+};
+/* *INDENT-ON* */
+
+VLIB_NODE_FUNCTION_MULTIARCH (nat44_ed_in2out_node,
+ nat44_ed_in2out_fast_path_fn);
+
+static uword
+nat44_ed_in2out_output_fast_path_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ return nat44_ed_in2out_node_fn_inline (vm, node, frame, 0, 1);
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (nat44_ed_in2out_output_node) = {
+ .function = nat44_ed_in2out_output_fast_path_fn,
+ .name = "nat44-ed-in2out-output",
+ .vector_size = sizeof (u32),
+ .format_trace = format_nat_in2out_ed_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .n_errors = ARRAY_LEN (nat_in2out_ed_error_strings),
+ .error_strings = nat_in2out_ed_error_strings,
+ .runtime_data_bytes = sizeof (snat_runtime_t),
+ .n_next_nodes = NAT_IN2OUT_ED_N_NEXT,
+ .next_nodes = {
+ [NAT_IN2OUT_ED_NEXT_DROP] = "error-drop",
+ [NAT_IN2OUT_ED_NEXT_LOOKUP] = "interface-output",
+ [NAT_IN2OUT_ED_NEXT_SLOW_PATH] = "nat44-ed-in2out-output-slowpath",
+ [NAT_IN2OUT_ED_NEXT_ICMP_ERROR] = "ip4-icmp-error",
+ [NAT_IN2OUT_ED_NEXT_REASS] = "nat44-ed-in2out-reass-output",
+ },
+};
+/* *INDENT-ON* */
+
+VLIB_NODE_FUNCTION_MULTIARCH (nat44_ed_in2out_output_node,
+ nat44_ed_in2out_output_fast_path_fn);
+
+static uword
+nat44_ed_in2out_slow_path_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ return nat44_ed_in2out_node_fn_inline (vm, node, frame, 1, 0);
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (nat44_ed_in2out_slowpath_node) = {
+ .function = nat44_ed_in2out_slow_path_fn,
+ .name = "nat44-ed-in2out-slowpath",
+ .vector_size = sizeof (u32),
+ .format_trace = format_nat_in2out_ed_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .n_errors = ARRAY_LEN (nat_in2out_ed_error_strings),
+ .error_strings = nat_in2out_ed_error_strings,
+ .runtime_data_bytes = sizeof (snat_runtime_t),
+ .n_next_nodes = NAT_IN2OUT_ED_N_NEXT,
+ .next_nodes = {
+ [NAT_IN2OUT_ED_NEXT_DROP] = "error-drop",
+ [NAT_IN2OUT_ED_NEXT_LOOKUP] = "ip4-lookup",
+ [NAT_IN2OUT_ED_NEXT_SLOW_PATH] = "nat44-ed-in2out-slowpath",
+ [NAT_IN2OUT_ED_NEXT_ICMP_ERROR] = "ip4-icmp-error",
+ [NAT_IN2OUT_ED_NEXT_REASS] = "nat44-ed-in2out-reass",
+ },
+};
+/* *INDENT-ON* */
+
+VLIB_NODE_FUNCTION_MULTIARCH (nat44_ed_in2out_slowpath_node,
+ nat44_ed_in2out_slow_path_fn);
+
+static uword
+nat44_ed_in2out_output_slow_path_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ return nat44_ed_in2out_node_fn_inline (vm, node, frame, 1, 1);
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (nat44_ed_in2out_output_slowpath_node) = {
+ .function = nat44_ed_in2out_output_slow_path_fn,
+ .name = "nat44-ed-in2out-output-slowpath",
+ .vector_size = sizeof (u32),
+ .format_trace = format_nat_in2out_ed_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .n_errors = ARRAY_LEN (nat_in2out_ed_error_strings),
+ .error_strings = nat_in2out_ed_error_strings,
+ .runtime_data_bytes = sizeof (snat_runtime_t),
+ .n_next_nodes = NAT_IN2OUT_ED_N_NEXT,
+ .next_nodes = {
+ [NAT_IN2OUT_ED_NEXT_DROP] = "error-drop",
+ [NAT_IN2OUT_ED_NEXT_LOOKUP] = "interface-output",
+ [NAT_IN2OUT_ED_NEXT_SLOW_PATH] = "nat44-ed-in2out-output-slowpath",
+ [NAT_IN2OUT_ED_NEXT_ICMP_ERROR] = "ip4-icmp-error",
+ [NAT_IN2OUT_ED_NEXT_REASS] = "nat44-ed-in2out-reass",
+ },
+};
+/* *INDENT-ON* */
+
+VLIB_NODE_FUNCTION_MULTIARCH (nat44_ed_in2out_output_slowpath_node,
+ nat44_ed_in2out_output_slow_path_fn);
+
+static inline uword
+nat44_ed_in2out_reass_node_fn_inline (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame,
+ int is_output_feature)
+{
+ u32 n_left_from, *from, *to_next;
+ nat_in2out_ed_next_t next_index;
+ u32 pkts_processed = 0;
+ snat_main_t *sm = &snat_main;
+ f64 now = vlib_time_now (vm);
+ u32 thread_index = vm->thread_index;
+ snat_main_per_thread_data_t *per_thread_data =
+ &sm->per_thread_data[thread_index];
+ u32 *fragments_to_drop = 0;
+ u32 *fragments_to_loopback = 0;
+
+ from = vlib_frame_vector_args (frame);
+ n_left_from = frame->n_vectors;
+ next_index = node->cached_next_index;
+
+ while (n_left_from > 0)
+ {
+ u32 n_left_to_next;
+
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+ while (n_left_from > 0 && n_left_to_next > 0)
+ {
+ u32 bi0, sw_if_index0, proto0, rx_fib_index0, new_addr0, old_addr0;
+ u32 iph_offset0 = 0;
+ vlib_buffer_t *b0;
+ u32 next0;
+ u8 cached0 = 0;
+ ip4_header_t *ip0 = 0;
+ nat_reass_ip4_t *reass0;
+ udp_header_t *udp0;
+ tcp_header_t *tcp0;
+ icmp46_header_t *icmp0;
+ clib_bihash_kv_16_8_t kv0, value0;
+ snat_session_t *s0 = 0;
+ u16 old_port0, new_port0;
+ ip_csum_t sum0;
+
+ /* speculatively enqueue b0 to the current next frame */
+ bi0 = from[0];
+ to_next[0] = bi0;
+ from += 1;
+ to_next += 1;
+ n_left_from -= 1;
+ n_left_to_next -= 1;
+
+ b0 = vlib_get_buffer (vm, bi0);
+
+ next0 = NAT_IN2OUT_ED_NEXT_LOOKUP;
+
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+ rx_fib_index0 =
+ fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
+ sw_if_index0);
+
+ if (PREDICT_FALSE (nat_reass_is_drop_frag (0)))
+ {
+ next0 = NAT_IN2OUT_ED_NEXT_DROP;
+ b0->error = node->errors[NAT_IN2OUT_ED_ERROR_DROP_FRAGMENT];
+ goto trace0;
+ }
+
+ if (is_output_feature)
+ iph_offset0 = vnet_buffer (b0)->ip.save_rewrite_length;
+
+ ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) +
+ iph_offset0);
+
+ udp0 = ip4_next_header (ip0);
+ tcp0 = (tcp_header_t *) udp0;
+ icmp0 = (icmp46_header_t *) udp0;
+ proto0 = ip_proto_to_snat_proto (ip0->protocol);
+
+ reass0 = nat_ip4_reass_find_or_create (ip0->src_address,
+ ip0->dst_address,
+ ip0->fragment_id,
+ ip0->protocol,
+ 1, &fragments_to_drop);
+
+ if (PREDICT_FALSE (!reass0))
+ {
+ next0 = NAT_IN2OUT_ED_NEXT_DROP;
+ b0->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_REASS];
+ nat_log_notice ("maximum reassemblies exceeded");
+ goto trace0;
+ }
+
+ if (PREDICT_FALSE (ip4_is_first_fragment (ip0)))
+ {
+ if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
+ {
+ if (is_output_feature)
+ {
+ if (PREDICT_FALSE
+ (nat_not_translate_output_feature_fwd
+ (sm, ip0, thread_index, now, vm, b0)))
+ reass0->flags |= NAT_REASS_FLAG_ED_DONT_TRANSLATE;
+ goto trace0;
+ }
+
+ next0 = icmp_in2out_ed_slow_path
+ (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
+ next0, now, thread_index, &s0);
+
+ if (PREDICT_TRUE (next0 != NAT_IN2OUT_ED_NEXT_DROP))
+ {
+ if (s0)
+ reass0->sess_index = s0 - per_thread_data->sessions;
+ else
+ reass0->flags |= NAT_REASS_FLAG_ED_DONT_TRANSLATE;
+ nat_ip4_reass_get_frags (reass0,
+ &fragments_to_loopback);
+ }
+
+ goto trace0;
+ }
+
+ make_ed_kv (&kv0, &ip0->src_address, &ip0->dst_address,
+ ip0->protocol, rx_fib_index0, udp0->src_port,
+ udp0->dst_port);
+
+ if (clib_bihash_search_16_8
+ (&per_thread_data->in2out_ed, &kv0, &value0))
+ {
+ if (is_output_feature)
+ {
+ if (PREDICT_FALSE
+ (nat44_ed_not_translate_output_feature
+ (sm, ip0, ip0->protocol, udp0->src_port,
+ udp0->dst_port, thread_index, sw_if_index0,
+ vnet_buffer (b0)->sw_if_index[VLIB_TX])))
+ {
+ reass0->flags |= NAT_REASS_FLAG_ED_DONT_TRANSLATE;
+ nat_ip4_reass_get_frags (reass0,
+ &fragments_to_loopback);
+ goto trace0;
+ }
+ }
+ else
+ {
+ if (PREDICT_FALSE (nat44_ed_not_translate (sm, node,
+ sw_if_index0,
+ ip0, proto0,
+ rx_fib_index0,
+ thread_index)))
+ {
+ reass0->flags |= NAT_REASS_FLAG_ED_DONT_TRANSLATE;
+ nat_ip4_reass_get_frags (reass0,
+ &fragments_to_loopback);
+ goto trace0;
+ }
+ }
+
+ next0 = slow_path_ed (sm, b0, rx_fib_index0, &kv0,
+ &s0, node, next0, thread_index, now);
+
+ if (PREDICT_FALSE (next0 == NAT_IN2OUT_ED_NEXT_DROP))
+ goto trace0;
+
+ reass0->sess_index = s0 - per_thread_data->sessions;
+ }
+ else
+ {
+ s0 = pool_elt_at_index (per_thread_data->sessions,
+ value0.value);
+ reass0->sess_index = value0.value;
+ }
+ nat_ip4_reass_get_frags (reass0, &fragments_to_loopback);
+ }
+ else
+ {
+ if (reass0->flags & NAT_REASS_FLAG_ED_DONT_TRANSLATE)
+ goto trace0;
+ if (PREDICT_FALSE (reass0->sess_index == (u32) ~ 0))
+ {
+ if (nat_ip4_reass_add_fragment
+ (reass0, bi0, &fragments_to_drop))
+ {
+ b0->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_FRAG];
+ nat_log_notice
+ ("maximum fragments per reassembly exceeded");
+ next0 = NAT_IN2OUT_ED_NEXT_DROP;
+ goto trace0;
+ }
+ cached0 = 1;
+ goto trace0;
+ }
+ s0 = pool_elt_at_index (per_thread_data->sessions,
+ reass0->sess_index);
+ }
+
+ old_addr0 = ip0->src_address.as_u32;
+ ip0->src_address = s0->out2in.addr;
+ new_addr0 = ip0->src_address.as_u32;
+ if (!is_output_feature)
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index;
+
+ sum0 = ip0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
+ ip4_header_t,
+ src_address /* changed member */ );
+ if (PREDICT_FALSE (is_twice_nat_session (s0)))
+ sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32,
+ s0->ext_host_addr.as_u32, ip4_header_t,
+ dst_address);
+ ip0->checksum = ip_csum_fold (sum0);
+
+ if (PREDICT_FALSE (ip4_is_first_fragment (ip0)))
+ {
+ if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
+ {
+ old_port0 = tcp0->src_port;
+ tcp0->src_port = s0->out2in.port;
+ new_port0 = tcp0->src_port;
+
+ sum0 = tcp0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
+ ip4_header_t,
+ dst_address /* changed member */ );
+ sum0 = ip_csum_update (sum0, old_port0, new_port0,
+ ip4_header_t /* cheat */ ,
+ length /* changed member */ );
+ if (PREDICT_FALSE (is_twice_nat_session (s0)))
+ {
+ sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32,
+ s0->ext_host_addr.as_u32,
+ ip4_header_t, dst_address);
+ sum0 = ip_csum_update (sum0, tcp0->dst_port,
+ s0->ext_host_port, ip4_header_t,
+ length);
+ tcp0->dst_port = s0->ext_host_port;
+ ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
+ }
+ tcp0->checksum = ip_csum_fold (sum0);
+ }
+ else
+ {
+ old_port0 = udp0->src_port;
+ udp0->src_port = s0->out2in.port;
+ udp0->checksum = 0;
+ if (PREDICT_FALSE (is_twice_nat_session (s0)))
+ {
+ udp0->dst_port = s0->ext_host_port;
+ ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
+ }
+ }
+ }
+
+ /* Hairpinning */
+ if (PREDICT_TRUE (proto0 != SNAT_PROTOCOL_ICMP))
+ nat44_reass_hairpinning (sm, b0, ip0, s0->out2in.port,
+ s0->ext_host_port, proto0, 1);
+ else
+ snat_icmp_hairpinning (sm, b0, ip0, icmp0, 1);
+
+ /* Accounting */
+ nat44_session_update_counters (s0, now,
+ vlib_buffer_length_in_chain (vm,
+ b0));
+
+ trace0:
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ nat44_reass_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->cached = cached0;
+ t->sw_if_index = sw_if_index0;
+ t->next_index = next0;
+ }
+
+ if (cached0)
+ {
+ n_left_to_next++;
+ to_next--;
+ }
+ else
+ {
+ pkts_processed += next0 != NAT_IN2OUT_ED_NEXT_DROP;
+
+ /* verify speculative enqueue, maybe switch current next frame */
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
+ to_next, n_left_to_next,
+ bi0, next0);
+ }
+
+ if (n_left_from == 0 && vec_len (fragments_to_loopback))
+ {
+ from = vlib_frame_vector_args (frame);
+ u32 len = vec_len (fragments_to_loopback);
+ if (len <= VLIB_FRAME_SIZE)
+ {
+ clib_memcpy (from, fragments_to_loopback,
+ sizeof (u32) * len);
+ n_left_from = len;
+ vec_reset_length (fragments_to_loopback);
+ }
+ else
+ {
+ clib_memcpy (from,
+ fragments_to_loopback + (len -
+ VLIB_FRAME_SIZE),
+ sizeof (u32) * VLIB_FRAME_SIZE);
+ n_left_from = VLIB_FRAME_SIZE;
+ _vec_len (fragments_to_loopback) = len - VLIB_FRAME_SIZE;
+ }
+ }
+ }
+
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
+
+ vlib_node_increment_counter (vm, nat44_ed_in2out_reass_node.index,
+ NAT_IN2OUT_ED_ERROR_IN2OUT_PACKETS,
+ pkts_processed);
+
+ nat_send_all_to_node (vm, fragments_to_drop, node,
+ &node->errors[NAT_IN2OUT_ED_ERROR_DROP_FRAGMENT],
+ NAT_IN2OUT_ED_NEXT_DROP);
+
+ vec_free (fragments_to_drop);
+ vec_free (fragments_to_loopback);
+ return frame->n_vectors;
+}
+
+static uword
+nat44_ed_in2out_reass_node_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ return nat44_ed_in2out_reass_node_fn_inline (vm, node, frame, 0);
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (nat44_ed_in2out_reass_node) = {
+ .function = nat44_ed_in2out_reass_node_fn,
+ .name = "nat44-ed-in2out-reass",
+ .vector_size = sizeof (u32),
+ .format_trace = format_nat44_reass_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .n_errors = ARRAY_LEN (nat_in2out_ed_error_strings),
+ .error_strings = nat_in2out_ed_error_strings,
+ .n_next_nodes = NAT_IN2OUT_ED_N_NEXT,
+ .next_nodes = {
+ [NAT_IN2OUT_ED_NEXT_DROP] = "error-drop",
+ [NAT_IN2OUT_ED_NEXT_LOOKUP] = "ip4-lookup",
+ [NAT_IN2OUT_ED_NEXT_SLOW_PATH] = "nat44-in2out-slowpath",
+ [NAT_IN2OUT_ED_NEXT_ICMP_ERROR] = "ip4-icmp-error",
+ [NAT_IN2OUT_ED_NEXT_REASS] = "nat44-ed-in2out-reass",
+ },
+};
+/* *INDENT-ON* */
+
+VLIB_NODE_FUNCTION_MULTIARCH (nat44_ed_in2out_reass_node,
+ nat44_ed_in2out_reass_node_fn);
+
+static uword
+nat44_ed_in2out_reass_output_node_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ return nat44_ed_in2out_reass_node_fn_inline (vm, node, frame, 1);
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (nat44_ed_in2out_reass_output_node) = {
+ .function = nat44_ed_in2out_reass_output_node_fn,
+ .name = "nat44-ed-in2out-reass-output",
+ .vector_size = sizeof (u32),
+ .format_trace = format_nat44_reass_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .n_errors = ARRAY_LEN (nat_in2out_ed_error_strings),
+ .error_strings = nat_in2out_ed_error_strings,
+ .n_next_nodes = NAT_IN2OUT_ED_N_NEXT,
+ .next_nodes = {
+ [NAT_IN2OUT_ED_NEXT_DROP] = "error-drop",
+ [NAT_IN2OUT_ED_NEXT_LOOKUP] = "interface-output",
+ [NAT_IN2OUT_ED_NEXT_SLOW_PATH] = "nat44-in2out-slowpath",
+ [NAT_IN2OUT_ED_NEXT_ICMP_ERROR] = "ip4-icmp-error",
+ [NAT_IN2OUT_ED_NEXT_REASS] = "nat44-ed-in2out-reass",
+ },
+};
+/* *INDENT-ON* */
+
+VLIB_NODE_FUNCTION_MULTIARCH (nat44_ed_in2out_reass_output_node,
+ nat44_ed_in2out_reass_output_node_fn);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
snat_main_t snat_main;
+/* *INDENT-OFF* */
/* Hook up input features */
VNET_FEATURE_INIT (ip4_snat_in2out, static) = {
};
-/* *INDENT-OFF* */
VLIB_PLUGIN_REGISTER () = {
.version = VPP_BUILD_VER,
.description = "Network Address Translation",
};
/* *INDENT-ON* */
-vlib_node_registration_t nat44_classify_node;
-vlib_node_registration_t nat44_ed_classify_node;
-vlib_node_registration_t nat44_det_classify_node;
-vlib_node_registration_t nat44_handoff_classify_node;
-
-#define foreach_nat44_classify_error \
-_(MAX_REASS, "Maximum reassemblies exceeded") \
-_(MAX_FRAG, "Maximum fragments per reassembly exceeded")
-
-typedef enum {
-#define _(sym,str) NAT44_CLASSIFY_ERROR_##sym,
- foreach_nat44_classify_error
-#undef _
- NAT44_CLASSIFY_N_ERROR,
-} nat44_classify_error_t;
-
-static char * nat44_classify_error_strings[] = {
-#define _(sym,string) string,
- foreach_nat44_classify_error
-#undef _
-};
-
-typedef enum {
- NAT44_CLASSIFY_NEXT_IN2OUT,
- NAT44_CLASSIFY_NEXT_OUT2IN,
- NAT44_CLASSIFY_NEXT_DROP,
- NAT44_CLASSIFY_N_NEXT,
-} nat44_classify_next_t;
-
void
nat_free_session_data (snat_main_t * sm, snat_session_t * s, u32 thread_index)
{
ed_kv.key[0] = ed_key.as_u64[0];
ed_kv.key[1] = ed_key.as_u64[1];
if (clib_bihash_add_del_16_8 (&tsm->in2out_ed, &ed_kv, 0))
- nat_log_warn ("in2out_ed key del failed");
+ nat_log_warn ("in2out_ed key del failed");
return;
}
if (is_ed_session (s))
{
if (is_affinity_sessions (s))
- nat_affinity_unlock (s->ext_host_addr, s->out2in.addr,
- s->in2out.protocol, s->out2in.port);
+ nat_affinity_unlock (s->ext_host_addr, s->out2in.addr,
+ s->in2out.protocol, s->out2in.port);
ed_key.l_addr = s->out2in.addr;
ed_key.r_addr = s->ext_host_addr;
ed_key.fib_index = s->out2in.fib_index;
if (snat_is_unk_proto_session (s))
- {
- ed_key.proto = s->in2out.port;
- ed_key.r_port = 0;
- ed_key.l_port = 0;
- }
+ {
+ ed_key.proto = s->in2out.port;
+ ed_key.r_port = 0;
+ ed_key.l_port = 0;
+ }
else
- {
- ed_key.proto = snat_proto_to_ip_proto (s->in2out.protocol);
- ed_key.l_port = s->out2in.port;
- ed_key.r_port = s->ext_host_port;
- }
+ {
+ ed_key.proto = snat_proto_to_ip_proto (s->in2out.protocol);
+ ed_key.l_port = s->out2in.port;
+ ed_key.r_port = s->ext_host_port;
+ }
ed_kv.key[0] = ed_key.as_u64[0];
ed_kv.key[1] = ed_key.as_u64[1];
if (clib_bihash_add_del_16_8 (&tsm->out2in_ed, &ed_kv, 0))
- nat_log_warn ("out2in_ed key del failed");
+ nat_log_warn ("out2in_ed key del failed");
ed_key.l_addr = s->in2out.addr;
ed_key.fib_index = s->in2out.fib_index;
if (!snat_is_unk_proto_session (s))
- ed_key.l_port = s->in2out.port;
+ ed_key.l_port = s->in2out.port;
if (is_twice_nat_session (s))
- {
- ed_key.r_addr = s->ext_host_nat_addr;
- ed_key.r_port = s->ext_host_nat_port;
- }
+ {
+ ed_key.r_addr = s->ext_host_nat_addr;
+ ed_key.r_port = s->ext_host_nat_port;
+ }
ed_kv.key[0] = ed_key.as_u64[0];
ed_kv.key[1] = ed_key.as_u64[1];
if (clib_bihash_add_del_16_8 (&tsm->in2out_ed, &ed_kv, 0))
- nat_log_warn ("in2out_ed key del failed");
+ nat_log_warn ("in2out_ed key del failed");
}
else
{
kv.key = s->in2out.as_u64;
if (clib_bihash_add_del_8_8 (&tsm->in2out, &kv, 0))
- nat_log_warn ("in2out key del failed");
+ nat_log_warn ("in2out key del failed");
kv.key = s->out2in.as_u64;
if (clib_bihash_add_del_8_8 (&tsm->out2in, &kv, 0))
- nat_log_warn ("out2in key del failed");
+ nat_log_warn ("out2in key del failed");
}
if (snat_is_unk_proto_session (s))
return;
/* log NAT event */
- snat_ipfix_logging_nat44_ses_delete(s->in2out.addr.as_u32,
- s->out2in.addr.as_u32,
- s->in2out.protocol,
- s->in2out.port,
- s->out2in.port,
- s->in2out.fib_index);
+ snat_ipfix_logging_nat44_ses_delete (s->in2out.addr.as_u32,
+ s->out2in.addr.as_u32,
+ s->in2out.protocol,
+ s->in2out.port,
+ s->out2in.port, s->in2out.fib_index);
/* Twice NAT address and port for external host */
if (is_twice_nat_session (s))
key.port = s->ext_host_nat_port;
key.addr.as_u32 = s->ext_host_nat_addr.as_u32;
snat_free_outside_address_and_port (sm->twice_nat_addresses,
- thread_index, &key);
+ thread_index, &key);
}
if (snat_is_session_static (s))
return;
- if (s->outside_address_index != ~0)
- snat_free_outside_address_and_port (sm->addresses, thread_index,
- &s->out2in);
+ snat_free_outside_address_and_port (sm->addresses, thread_index,
+ &s->out2in);
}
snat_user_t *
-nat_user_get_or_create (snat_main_t *sm, ip4_address_t *addr, u32 fib_index,
- u32 thread_index)
+nat_user_get_or_create (snat_main_t * sm, ip4_address_t * addr, u32 fib_index,
+ u32 thread_index)
{
snat_user_t *u = 0;
snat_user_key_t user_key;
clib_bihash_kv_8_8_t kv, value;
snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
- dlist_elt_t * per_user_list_head_elt;
+ dlist_elt_t *per_user_list_head_elt;
user_key.addr.as_u32 = addr->as_u32;
user_key.fib_index = fib_index;
pool_get (tsm->list_pool, per_user_list_head_elt);
u->sessions_per_user_list_head_index = per_user_list_head_elt -
- tsm->list_pool;
+ tsm->list_pool;
clib_dlist_init (tsm->list_pool, u->sessions_per_user_list_head_index);
/* add user */
if (clib_bihash_add_del_8_8 (&tsm->user_hash, &kv, 1))
- nat_log_warn ("user_hash keay add failed");
+ nat_log_warn ("user_hash keay add failed");
}
else
{
}
snat_session_t *
-nat_session_alloc_or_recycle (snat_main_t *sm, snat_user_t *u, u32 thread_index)
+nat_session_alloc_or_recycle (snat_main_t * sm, snat_user_t * u,
+ u32 thread_index)
{
snat_session_t *s;
snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
u32 oldest_per_user_translation_list_index, session_index;
- dlist_elt_t * oldest_per_user_translation_list_elt;
- dlist_elt_t * per_user_translation_list_elt;
+ dlist_elt_t *oldest_per_user_translation_list_elt;
+ dlist_elt_t *per_user_translation_list_elt;
/* Over quota? Recycle the least recently used translation */
if ((u->nsessions + u->nstaticsessions) >= sm->max_translations_per_user)
{
oldest_per_user_translation_list_index =
- clib_dlist_remove_head (tsm->list_pool,
- u->sessions_per_user_list_head_index);
+ clib_dlist_remove_head (tsm->list_pool,
+ u->sessions_per_user_list_head_index);
ASSERT (oldest_per_user_translation_list_index != ~0);
/* Add it back to the end of the LRU list */
clib_dlist_addtail (tsm->list_pool,
- u->sessions_per_user_list_head_index,
- oldest_per_user_translation_list_index);
+ u->sessions_per_user_list_head_index,
+ oldest_per_user_translation_list_index);
/* Get the list element */
oldest_per_user_translation_list_elt =
- pool_elt_at_index (tsm->list_pool,
- oldest_per_user_translation_list_index);
+ pool_elt_at_index (tsm->list_pool,
+ oldest_per_user_translation_list_index);
/* Get the session index from the list element */
session_index = oldest_per_user_translation_list_elt->value;
/* Get the session */
s = pool_elt_at_index (tsm->sessions, session_index);
nat_free_session_data (sm, s, thread_index);
- if (snat_is_session_static(s))
- u->nstaticsessions--;
+ if (snat_is_session_static (s))
+ u->nstaticsessions--;
else
- u->nsessions--;
- s->outside_address_index = ~0;
+ u->nsessions--;
s->flags = 0;
s->total_bytes = 0;
s->total_pkts = 0;
{
pool_get (tsm->sessions, s);
memset (s, 0, sizeof (*s));
- s->outside_address_index = ~0;
/* Create list elts */
pool_get (tsm->list_pool, per_user_translation_list_elt);
clib_dlist_init (tsm->list_pool,
- per_user_translation_list_elt - tsm->list_pool);
+ per_user_translation_list_elt - tsm->list_pool);
per_user_translation_list_elt->value = s - tsm->sessions;
s->per_user_index = per_user_translation_list_elt - tsm->list_pool;
s->per_user_list_head_index = u->sessions_per_user_list_head_index;
clib_dlist_addtail (tsm->list_pool,
- s->per_user_list_head_index,
- per_user_translation_list_elt - tsm->list_pool);
+ s->per_user_list_head_index,
+ per_user_translation_list_elt - tsm->list_pool);
}
return s;
}
snat_session_t *
-nat_ed_session_alloc (snat_main_t *sm, snat_user_t *u, u32 thread_index)
+nat_ed_session_alloc (snat_main_t * sm, snat_user_t * u, u32 thread_index)
{
snat_session_t *s;
snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
- dlist_elt_t * per_user_translation_list_elt;
+ dlist_elt_t *per_user_translation_list_elt;
if ((u->nsessions + u->nstaticsessions) >= sm->max_translations_per_user)
{
- nat_log_warn ("max translations per user %U", format_ip4_address, &u->addr);
+ nat_log_warn ("max translations per user %U", format_ip4_address,
+ &u->addr);
snat_ipfix_logging_max_entries_per_user (sm->max_translations_per_user,
- u->addr.as_u32);
+ u->addr.as_u32);
return 0;
}
pool_get (tsm->sessions, s);
memset (s, 0, sizeof (*s));
- s->outside_address_index = ~0;
/* Create list elts */
pool_get (tsm->list_pool, per_user_translation_list_elt);
clib_dlist_init (tsm->list_pool,
- per_user_translation_list_elt - tsm->list_pool);
+ per_user_translation_list_elt - tsm->list_pool);
per_user_translation_list_elt->value = s - tsm->sessions;
s->per_user_index = per_user_translation_list_elt - tsm->list_pool;
s->per_user_list_head_index = u->sessions_per_user_list_head_index;
clib_dlist_addtail (tsm->list_pool,
- s->per_user_list_head_index,
- per_user_translation_list_elt - tsm->list_pool);
-
- return s;
-}
-
-typedef struct {
- u8 next_in2out;
- u8 cached;
-} nat44_classify_trace_t;
-
-static u8 * format_nat44_classify_trace (u8 * s, va_list * args)
-{
- CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
- CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
- nat44_classify_trace_t *t = va_arg (*args, nat44_classify_trace_t *);
- char *next;
-
- if (t->cached)
- s = format (s, "nat44-classify: fragment cached");
- else
- {
- next = t->next_in2out ? "nat44-in2out" : "nat44-out2in";
- s = format (s, "nat44-classify: next %s", next);
- }
+ s->per_user_list_head_index,
+ per_user_translation_list_elt - tsm->list_pool);
return s;
}
-static inline uword
-nat44_classify_node_fn_inline (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame,
- int is_ed)
-{
- u32 n_left_from, * from, * to_next;
- nat44_classify_next_t next_index;
- snat_main_t *sm = &snat_main;
- snat_static_mapping_t *m;
- u32 thread_index = vm->thread_index;
- snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
- u32 *fragments_to_drop = 0;
- u32 *fragments_to_loopback = 0;
-
- from = vlib_frame_vector_args (frame);
- n_left_from = frame->n_vectors;
- next_index = node->cached_next_index;
-
- while (n_left_from > 0)
- {
- u32 n_left_to_next;
-
- vlib_get_next_frame (vm, node, next_index,
- to_next, n_left_to_next);
-
- while (n_left_from > 0 && n_left_to_next > 0)
- {
- u32 bi0;
- vlib_buffer_t *b0;
- u32 next0 = NAT44_CLASSIFY_NEXT_IN2OUT, sw_if_index0, rx_fib_index0;
- ip4_header_t *ip0;
- snat_address_t *ap;
- snat_session_key_t m_key0;
- clib_bihash_kv_8_8_t kv0, value0;
- clib_bihash_kv_16_8_t ed_kv0, ed_value0;
- udp_header_t *udp0;
- nat_reass_ip4_t *reass0;
- u8 cached0 = 0;
-
- /* speculatively enqueue b0 to the current next frame */
- bi0 = from[0];
- to_next[0] = bi0;
- from += 1;
- to_next += 1;
- n_left_from -= 1;
- n_left_to_next -= 1;
-
- b0 = vlib_get_buffer (vm, bi0);
- ip0 = vlib_buffer_get_current (b0);
- udp0 = ip4_next_header (ip0);
-
- if (is_ed && ip0->protocol != IP_PROTOCOL_ICMP)
- {
- if (!ip4_is_fragment (ip0) || ip4_is_first_fragment (ip0))
- {
- /* process leading fragment/whole packet (with L4 header) */
- sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
- rx_fib_index0 =
- fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
- sw_if_index0);
- make_ed_kv (&ed_kv0, &ip0->src_address, &ip0->dst_address,
- ip0->protocol, rx_fib_index0, udp0->src_port,
- udp0->dst_port);
- if (ip4_is_fragment (ip0))
- {
- reass0 = nat_ip4_reass_find_or_create (ip0->src_address,
- ip0->dst_address,
- ip0->fragment_id,
- ip0->protocol,
- 1,
- &fragments_to_drop);
- if (PREDICT_FALSE (!reass0))
- {
- next0 = NAT44_CLASSIFY_NEXT_DROP;
- b0->error = node->errors[NAT44_CLASSIFY_ERROR_MAX_REASS];
- nat_log_notice ("maximum reassemblies exceeded");
- goto enqueue0;
- }
- if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &ed_kv0,
- &ed_value0))
- {
- /* session exists so classify as IN2OUT,
- * save this information for future fragments and set
- * past fragments to be looped over and reprocessed */
- reass0->sess_index = ed_value0.value;
- reass0->classify_next = NAT_REASS_IP4_CLASSIFY_NEXT_IN2OUT;
- nat_ip4_reass_get_frags (reass0,
- &fragments_to_loopback);
- goto enqueue0;
- }
- else
- {
- /* session doesn't exist so continue in the code,
- * save this information for future fragments and set
- * past fragments to be looped over and reprocessed */
- reass0->flags |= NAT_REASS_FLAG_CLASSIFY_ED_CONTINUE;
- nat_ip4_reass_get_frags (reass0,
- &fragments_to_loopback);
- }
- }
- else
- {
- /* process whole packet */
- if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &ed_kv0,
- &ed_value0))
- goto enqueue0;
- /* session doesn't exist so continue in code */
- }
- }
- else
- {
- /* process non-first fragment */
- reass0 = nat_ip4_reass_find_or_create (ip0->src_address,
- ip0->dst_address,
- ip0->fragment_id,
- ip0->protocol,
- 1,
- &fragments_to_drop);
- if (PREDICT_FALSE (!reass0))
- {
- next0 = NAT44_CLASSIFY_NEXT_DROP;
- b0->error = node->errors[NAT44_CLASSIFY_ERROR_MAX_REASS];
- nat_log_notice ("maximum reassemblies exceeded");
- goto enqueue0;
- }
- /* check if first fragment has arrived */
- if (reass0->classify_next == NAT_REASS_IP4_CLASSIFY_NONE &&
- !(reass0->flags & NAT_REASS_FLAG_CLASSIFY_ED_CONTINUE))
- {
- /* first fragment still hasn't arrived, cache this fragment */
- if (nat_ip4_reass_add_fragment (reass0, bi0,
- &fragments_to_drop))
- {
- b0->error = node->errors[NAT44_CLASSIFY_ERROR_MAX_FRAG];
- nat_log_notice ("maximum fragments per reassembly exceeded");
- next0 = NAT44_CLASSIFY_NEXT_DROP;
- goto enqueue0;
- }
- cached0 = 1;
- goto enqueue0;
- }
- if (reass0->classify_next == NAT_REASS_IP4_CLASSIFY_NEXT_IN2OUT)
- goto enqueue0;
- /* flag NAT_REASS_FLAG_CLASSIFY_ED_CONTINUE is set
- * so keep the default next0 and continue in code to
- * potentially find other classification for this packet */
- }
- }
-
- vec_foreach (ap, sm->addresses)
- {
- if (ip0->dst_address.as_u32 == ap->addr.as_u32)
- {
- next0 = NAT44_CLASSIFY_NEXT_OUT2IN;
- goto enqueue0;
- }
- }
-
- if (PREDICT_FALSE (pool_elts (sm->static_mappings)))
- {
- m_key0.addr = ip0->dst_address;
- m_key0.port = 0;
- m_key0.protocol = 0;
- m_key0.fib_index = 0;
- kv0.key = m_key0.as_u64;
- /* try to classify the fragment based on IP header alone */
- if (!clib_bihash_search_8_8 (&sm->static_mapping_by_external,
- &kv0, &value0))
- {
- m = pool_elt_at_index (sm->static_mappings, value0.value);
- if (m->local_addr.as_u32 != m->external_addr.as_u32)
- next0 = NAT44_CLASSIFY_NEXT_OUT2IN;
- goto enqueue0;
- }
- if (!ip4_is_fragment (ip0) || ip4_is_first_fragment (ip0))
- {
- /* process leading fragment/whole packet (with L4 header) */
- m_key0.port = clib_net_to_host_u16 (udp0->dst_port);
- m_key0.protocol = ip_proto_to_snat_proto (ip0->protocol);
- kv0.key = m_key0.as_u64;
- if (!clib_bihash_search_8_8 (&sm->static_mapping_by_external,
- &kv0, &value0))
- {
- m = pool_elt_at_index (sm->static_mappings, value0.value);
- if (m->local_addr.as_u32 != m->external_addr.as_u32)
- next0 = NAT44_CLASSIFY_NEXT_OUT2IN;
- }
- if (ip4_is_fragment (ip0))
- {
- reass0 = nat_ip4_reass_find_or_create (ip0->src_address,
- ip0->dst_address,
- ip0->fragment_id,
- ip0->protocol,
- 1,
- &fragments_to_drop);
- if (PREDICT_FALSE (!reass0))
- {
- next0 = NAT44_CLASSIFY_NEXT_DROP;
- b0->error = node->errors[NAT44_CLASSIFY_ERROR_MAX_REASS];
- nat_log_notice ("maximum reassemblies exceeded");
- goto enqueue0;
- }
- /* save classification for future fragments and set past
- * fragments to be looped over and reprocessed */
- if (next0 == NAT44_CLASSIFY_NEXT_OUT2IN)
- reass0->classify_next = NAT_REASS_IP4_CLASSIFY_NEXT_OUT2IN;
- else
- reass0->classify_next = NAT_REASS_IP4_CLASSIFY_NEXT_IN2OUT;
- nat_ip4_reass_get_frags (reass0, &fragments_to_loopback);
- }
- }
- else
- {
- /* process non-first fragment */
- reass0 = nat_ip4_reass_find_or_create (ip0->src_address,
- ip0->dst_address,
- ip0->fragment_id,
- ip0->protocol,
- 1,
- &fragments_to_drop);
- if (PREDICT_FALSE (!reass0))
- {
- next0 = NAT44_CLASSIFY_NEXT_DROP;
- b0->error = node->errors[NAT44_CLASSIFY_ERROR_MAX_REASS];
- nat_log_notice ("maximum reassemblies exceeded");
- goto enqueue0;
- }
- if (reass0->classify_next == NAT_REASS_IP4_CLASSIFY_NONE)
- /* first fragment still hasn't arrived */
- {
- if (nat_ip4_reass_add_fragment (reass0, bi0,
- &fragments_to_drop))
- {
- b0->error = node->errors[NAT44_CLASSIFY_ERROR_MAX_FRAG];
- nat_log_notice ("maximum fragments per reassembly exceeded");
- next0 = NAT44_CLASSIFY_NEXT_DROP;
- goto enqueue0;
- }
- cached0 = 1;
- goto enqueue0;
- }
- else if (reass0->classify_next == NAT_REASS_IP4_CLASSIFY_NEXT_OUT2IN)
- next0 = NAT44_CLASSIFY_NEXT_OUT2IN;
- else if (reass0->classify_next == NAT_REASS_IP4_CLASSIFY_NEXT_IN2OUT)
- next0 = NAT44_CLASSIFY_NEXT_IN2OUT;
- }
- }
-
- enqueue0:
- if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b0->flags & VLIB_BUFFER_IS_TRACED)))
- {
- nat44_classify_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->cached = cached0;
- if (!cached0)
- t->next_in2out = next0 == NAT44_CLASSIFY_NEXT_IN2OUT ? 1 : 0;
- }
-
- if (cached0)
- {
- n_left_to_next++;
- to_next--;
- }
- else
- /* verify speculative enqueue, maybe switch current next frame */
- vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
- to_next, n_left_to_next,
- bi0, next0);
-
- if (n_left_from == 0 && vec_len (fragments_to_loopback))
- {
- from = vlib_frame_vector_args (frame);
- u32 len = vec_len (fragments_to_loopback);
- if (len <= VLIB_FRAME_SIZE)
- {
- clib_memcpy (from, fragments_to_loopback, sizeof (u32) * len);
- n_left_from = len;
- vec_reset_length (fragments_to_loopback);
- }
- else
- {
- clib_memcpy (from,
- fragments_to_loopback + (len - VLIB_FRAME_SIZE),
- sizeof (u32) * VLIB_FRAME_SIZE);
- n_left_from = VLIB_FRAME_SIZE;
- _vec_len (fragments_to_loopback) = len - VLIB_FRAME_SIZE;
- }
- }
- }
-
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
- }
-
- nat_send_all_to_node (vm, fragments_to_drop, node, 0, NAT44_CLASSIFY_NEXT_DROP);
-
- vec_free (fragments_to_drop);
-
- return frame->n_vectors;
-}
-
-static uword
-nat44_classify_node_fn (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- return nat44_classify_node_fn_inline (vm, node, frame, 0);
-};
-
-VLIB_REGISTER_NODE (nat44_classify_node) = {
- .function = nat44_classify_node_fn,
- .name = "nat44-classify",
- .vector_size = sizeof (u32),
- .format_trace = format_nat44_classify_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
- .n_errors = ARRAY_LEN(nat44_classify_error_strings),
- .error_strings = nat44_classify_error_strings,
- .n_next_nodes = NAT44_CLASSIFY_N_NEXT,
- .next_nodes = {
- [NAT44_CLASSIFY_NEXT_IN2OUT] = "nat44-in2out",
- [NAT44_CLASSIFY_NEXT_OUT2IN] = "nat44-out2in",
- [NAT44_CLASSIFY_NEXT_DROP] = "error-drop",
- },
-};
-
-VLIB_NODE_FUNCTION_MULTIARCH (nat44_classify_node,
- nat44_classify_node_fn);
-static uword
-nat44_ed_classify_node_fn (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- return nat44_classify_node_fn_inline (vm, node, frame, 1);
-};
-
-VLIB_REGISTER_NODE (nat44_ed_classify_node) = {
- .function = nat44_ed_classify_node_fn,
- .name = "nat44-ed-classify",
- .vector_size = sizeof (u32),
- .format_trace = format_nat44_classify_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
- .n_next_nodes = NAT44_CLASSIFY_N_NEXT,
- .next_nodes = {
- [NAT44_CLASSIFY_NEXT_IN2OUT] = "nat44-ed-in2out",
- [NAT44_CLASSIFY_NEXT_OUT2IN] = "nat44-ed-out2in",
- [NAT44_CLASSIFY_NEXT_DROP] = "error-drop",
- },
-};
-
-VLIB_NODE_FUNCTION_MULTIARCH (nat44_ed_classify_node,
- nat44_ed_classify_node_fn);
-
-static uword
-nat44_det_classify_node_fn (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- return nat44_classify_node_fn_inline (vm, node, frame, 0);
-};
-
-VLIB_REGISTER_NODE (nat44_det_classify_node) = {
- .function = nat44_det_classify_node_fn,
- .name = "nat44-det-classify",
- .vector_size = sizeof (u32),
- .format_trace = format_nat44_classify_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
- .n_next_nodes = NAT44_CLASSIFY_N_NEXT,
- .next_nodes = {
- [NAT44_CLASSIFY_NEXT_IN2OUT] = "nat44-det-in2out",
- [NAT44_CLASSIFY_NEXT_OUT2IN] = "nat44-det-out2in",
- [NAT44_CLASSIFY_NEXT_DROP] = "error-drop",
- },
-};
-
-VLIB_NODE_FUNCTION_MULTIARCH (nat44_det_classify_node,
- nat44_det_classify_node_fn);
-
-static uword
-nat44_handoff_classify_node_fn (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- return nat44_classify_node_fn_inline (vm, node, frame, 0);
-};
-
-VLIB_REGISTER_NODE (nat44_handoff_classify_node) = {
- .function = nat44_handoff_classify_node_fn,
- .name = "nat44-handoff-classify",
- .vector_size = sizeof (u32),
- .format_trace = format_nat44_classify_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
- .n_next_nodes = NAT44_CLASSIFY_N_NEXT,
- .next_nodes = {
- [NAT44_CLASSIFY_NEXT_IN2OUT] = "nat44-in2out-worker-handoff",
- [NAT44_CLASSIFY_NEXT_OUT2IN] = "nat44-out2in-worker-handoff",
- [NAT44_CLASSIFY_NEXT_DROP] = "error-drop",
- },
-};
-
-VLIB_NODE_FUNCTION_MULTIARCH (nat44_handoff_classify_node,
- nat44_handoff_classify_node_fn);
-
-/**
- * @brief Add/del NAT address to FIB.
- *
- * Add the external NAT address to the FIB as receive entries. This ensures
- * that VPP will reply to ARP for this address and we don't need to enable
- * proxy ARP on the outside interface.
- *
- * @param addr IPv4 address.
- * @param plen address prefix length
- * @param sw_if_index Interface.
- * @param is_add If 0 delete, otherwise add.
- */
void
snat_add_del_addr_to_fib (ip4_address_t * addr, u8 p_len, u32 sw_if_index,
- int is_add)
+ int is_add)
{
fib_prefix_t prefix = {
.fp_len = p_len,
.fp_proto = FIB_PROTOCOL_IP4,
.fp_addr = {
- .ip4.as_u32 = addr->as_u32,
- },
+ .ip4.as_u32 = addr->as_u32,
+ },
};
- u32 fib_index = ip4_fib_table_get_index_for_sw_if_index(sw_if_index);
+ u32 fib_index = ip4_fib_table_get_index_for_sw_if_index (sw_if_index);
if (is_add)
- fib_table_entry_update_one_path(fib_index,
- &prefix,
- FIB_SOURCE_PLUGIN_LOW,
- (FIB_ENTRY_FLAG_CONNECTED |
- FIB_ENTRY_FLAG_LOCAL |
- FIB_ENTRY_FLAG_EXCLUSIVE),
- DPO_PROTO_IP4,
- NULL,
- sw_if_index,
- ~0,
- 1,
- NULL,
- FIB_ROUTE_PATH_FLAG_NONE);
+ fib_table_entry_update_one_path (fib_index,
+ &prefix,
+ FIB_SOURCE_PLUGIN_LOW,
+ (FIB_ENTRY_FLAG_CONNECTED |
+ FIB_ENTRY_FLAG_LOCAL |
+ FIB_ENTRY_FLAG_EXCLUSIVE),
+ DPO_PROTO_IP4,
+ NULL,
+ sw_if_index,
+ ~0, 1, NULL, FIB_ROUTE_PATH_FLAG_NONE);
else
- fib_table_entry_delete(fib_index,
- &prefix,
- FIB_SOURCE_PLUGIN_LOW);
+ fib_table_entry_delete (fib_index, &prefix, FIB_SOURCE_PLUGIN_LOW);
}
-int snat_add_address (snat_main_t *sm, ip4_address_t *addr, u32 vrf_id,
- u8 twice_nat)
+int
+snat_add_address (snat_main_t * sm, ip4_address_t * addr, u32 vrf_id,
+ u8 twice_nat)
{
- snat_address_t * ap;
+ snat_address_t *ap;
snat_interface_t *i;
vlib_thread_main_t *tm = vlib_get_thread_main ();
return VNET_API_ERROR_FEATURE_DISABLED;
/* Check if address already exists */
+ /* *INDENT-OFF* */
vec_foreach (ap, twice_nat ? sm->twice_nat_addresses : sm->addresses)
{
if (ap->addr.as_u32 == addr->as_u32)
return VNET_API_ERROR_VALUE_EXIST;
}
+ /* *INDENT-ON* */
if (twice_nat)
vec_add2 (sm->twice_nat_addresses, ap, 1);
if (vrf_id != ~0)
ap->fib_index =
fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP4, vrf_id,
- FIB_SOURCE_PLUGIN_LOW);
+ FIB_SOURCE_PLUGIN_LOW);
else
ap->fib_index = ~0;
#define _(N, i, n, s) \
vec_validate_init_empty (ap->busy_##n##_ports_per_thread, tm->n_vlib_mains - 1, 0);
foreach_snat_protocol
#undef _
-
- if (twice_nat)
+ if (twice_nat)
return 0;
/* Add external address to FIB */
+ /* *INDENT-OFF* */
pool_foreach (i, sm->interfaces,
({
if (nat_interface_is_inside(i) || sm->out2in_dpo)
snat_add_del_addr_to_fib(addr, 32, i->sw_if_index, 1);
break;
}));
+ /* *INDENT-ON* */
return 0;
}
-static int is_snat_address_used_in_static_mapping (snat_main_t *sm,
- ip4_address_t addr)
+static int
+is_snat_address_used_in_static_mapping (snat_main_t * sm, ip4_address_t addr)
{
snat_static_mapping_t *m;
+ /* *INDENT-OFF* */
pool_foreach (m, sm->static_mappings,
({
if (m->external_addr.as_u32 == addr.as_u32)
return 1;
}));
+ /* *INDENT-ON* */
return 0;
}
-void increment_v4_address (ip4_address_t * a)
+void
+increment_v4_address (ip4_address_t * a)
{
u32 v;
- v = clib_net_to_host_u32(a->as_u32) + 1;
- a->as_u32 = clib_host_to_net_u32(v);
+ v = clib_net_to_host_u32 (a->as_u32) + 1;
+ a->as_u32 = clib_host_to_net_u32 (v);
}
static void
snat_add_static_mapping_when_resolved (snat_main_t * sm,
- ip4_address_t l_addr,
- u16 l_port,
- u32 sw_if_index,
- u16 e_port,
- u32 vrf_id,
- snat_protocol_t proto,
- int addr_only,
- int is_add,
- u8 * tag)
+ ip4_address_t l_addr,
+ u16 l_port,
+ u32 sw_if_index,
+ u16 e_port,
+ u32 vrf_id,
+ snat_protocol_t proto,
+ int addr_only, int is_add, u8 * tag)
{
snat_static_map_resolve_t *rp;
rp->is_add = is_add;
rp->tag = vec_dup (tag);
}
-
-static u32 get_thread_idx_by_port(u16 e_port)
+
+static u32
+get_thread_idx_by_port (u16 e_port)
{
- snat_main_t * sm = &snat_main;
- u32 thread_idx = sm->num_workers;
- if (sm->num_workers > 1)
+ snat_main_t *sm = &snat_main;
+ u32 thread_idx = sm->num_workers;
+ if (sm->num_workers > 1)
{
- thread_idx = sm->first_worker_index + sm->workers[(e_port - 1024) / sm->port_per_thread];
- }
- return thread_idx;
+ thread_idx =
+ sm->first_worker_index +
+ sm->workers[(e_port - 1024) / sm->port_per_thread];
+ }
+ return thread_idx;
}
/**
*
* @returns
*/
-int snat_add_static_mapping(ip4_address_t l_addr, ip4_address_t e_addr,
- u16 l_port, u16 e_port, u32 vrf_id, int addr_only,
- u32 sw_if_index, snat_protocol_t proto, int is_add,
- twice_nat_type_t twice_nat, u8 out2in_only,
- u8 * tag)
+int
+snat_add_static_mapping (ip4_address_t l_addr, ip4_address_t e_addr,
+ u16 l_port, u16 e_port, u32 vrf_id, int addr_only,
+ u32 sw_if_index, snat_protocol_t proto, int is_add,
+ twice_nat_type_t twice_nat, u8 out2in_only, u8 * tag)
{
- snat_main_t * sm = &snat_main;
+ snat_main_t *sm = &snat_main;
snat_static_mapping_t *m;
snat_session_key_t m_key;
clib_bihash_kv_8_8_t kv, value;
snat_address_t *a = 0;
u32 fib_index = ~0;
- uword * p;
+ uword *p;
snat_interface_t *interface;
int i;
snat_main_per_thread_data_t *tsm;
snat_user_key_t u_key;
snat_user_t *u;
- dlist_elt_t * head, * elt;
+ dlist_elt_t *head, *elt;
u32 elt_index, head_index;
u32 ses_index;
u64 user_index;
- snat_session_t * s;
+ snat_session_t *s;
snat_static_map_resolve_t *rp, *rp_match = 0;
if (!sm->endpoint_dependent)
{
if (twice_nat || out2in_only)
- return VNET_API_ERROR_FEATURE_DISABLED;
+ return VNET_API_ERROR_FEATURE_DISABLED;
}
/* If the external address is a specific interface address */
if (sw_if_index != ~0)
{
- ip4_address_t * first_int_addr;
+ ip4_address_t *first_int_addr;
for (i = 0; i < vec_len (sm->to_resolve); i++)
- {
- rp = sm->to_resolve + i;
- if (rp->sw_if_index != sw_if_index ||
- rp->l_addr.as_u32 != l_addr.as_u32 ||
- rp->vrf_id != vrf_id || rp->addr_only != addr_only)
- continue;
+ {
+ rp = sm->to_resolve + i;
+ if (rp->sw_if_index != sw_if_index ||
+ rp->l_addr.as_u32 != l_addr.as_u32 ||
+ rp->vrf_id != vrf_id || rp->addr_only != addr_only)
+ continue;
- if (!addr_only)
- {
- if (rp->l_port != l_port || rp->e_port != e_port || rp->proto != proto)
- continue;
- }
+ if (!addr_only)
+ {
+ if (rp->l_port != l_port || rp->e_port != e_port
+ || rp->proto != proto)
+ continue;
+ }
- rp_match = rp;
- break;
- }
+ rp_match = rp;
+ break;
+ }
/* Might be already set... */
first_int_addr = ip4_interface_first_address
- (sm->ip4_main, sw_if_index, 0 /* just want the address*/);
+ (sm->ip4_main, sw_if_index, 0 /* just want the address */ );
if (is_add)
- {
- if (rp_match)
- return VNET_API_ERROR_VALUE_EXIST;
+ {
+ if (rp_match)
+ return VNET_API_ERROR_VALUE_EXIST;
- snat_add_static_mapping_when_resolved
- (sm, l_addr, l_port, sw_if_index, e_port, vrf_id, proto,
- addr_only, is_add, tag);
+ snat_add_static_mapping_when_resolved
+ (sm, l_addr, l_port, sw_if_index, e_port, vrf_id, proto,
+ addr_only, is_add, tag);
- /* DHCP resolution required? */
- if (first_int_addr == 0)
- {
- return 0;
- }
- else
- {
- e_addr.as_u32 = first_int_addr->as_u32;
- /* Identity mapping? */
- if (l_addr.as_u32 == 0)
- l_addr.as_u32 = e_addr.as_u32;
- }
- }
+ /* DHCP resolution required? */
+ if (first_int_addr == 0)
+ {
+ return 0;
+ }
+ else
+ {
+ e_addr.as_u32 = first_int_addr->as_u32;
+ /* Identity mapping? */
+ if (l_addr.as_u32 == 0)
+ l_addr.as_u32 = e_addr.as_u32;
+ }
+ }
else
- {
- if (!rp_match)
- return VNET_API_ERROR_NO_SUCH_ENTRY;
+ {
+ if (!rp_match)
+ return VNET_API_ERROR_NO_SUCH_ENTRY;
- vec_del1 (sm->to_resolve, i);
+ vec_del1 (sm->to_resolve, i);
- if (first_int_addr)
- {
- e_addr.as_u32 = first_int_addr->as_u32;
- /* Identity mapping? */
- if (l_addr.as_u32 == 0)
- l_addr.as_u32 = e_addr.as_u32;
- }
- else
- return 0;
- }
+ if (first_int_addr)
+ {
+ e_addr.as_u32 = first_int_addr->as_u32;
+ /* Identity mapping? */
+ if (l_addr.as_u32 == 0)
+ l_addr.as_u32 = e_addr.as_u32;
+ }
+ else
+ return 0;
+ }
}
m_key.addr = e_addr;
if (is_add)
{
if (m)
- return VNET_API_ERROR_VALUE_EXIST;
+ return VNET_API_ERROR_VALUE_EXIST;
if (twice_nat && addr_only)
- return VNET_API_ERROR_UNSUPPORTED;
+ return VNET_API_ERROR_UNSUPPORTED;
/* Convert VRF id to FIB index */
if (vrf_id != ~0)
- {
- p = hash_get (sm->ip4_main->fib_index_by_table_id, vrf_id);
- if (!p)
- return VNET_API_ERROR_NO_SUCH_FIB;
- fib_index = p[0];
- }
+ {
+ p = hash_get (sm->ip4_main->fib_index_by_table_id, vrf_id);
+ if (!p)
+ return VNET_API_ERROR_NO_SUCH_FIB;
+ fib_index = p[0];
+ }
/* If not specified use inside VRF id from SNAT plugin startup config */
else
- {
- fib_index = sm->inside_fib_index;
- vrf_id = sm->inside_vrf_id;
- }
+ {
+ fib_index = sm->inside_fib_index;
+ vrf_id = sm->inside_vrf_id;
+ }
if (!out2in_only)
- {
- m_key.addr = l_addr;
- m_key.port = addr_only ? 0 : l_port;
- m_key.protocol = addr_only ? 0 : proto;
- m_key.fib_index = fib_index;
- kv.key = m_key.as_u64;
- if (!clib_bihash_search_8_8 (&sm->static_mapping_by_local, &kv, &value))
- return VNET_API_ERROR_VALUE_EXIST;
- }
+ {
+ m_key.addr = l_addr;
+ m_key.port = addr_only ? 0 : l_port;
+ m_key.protocol = addr_only ? 0 : proto;
+ m_key.fib_index = fib_index;
+ kv.key = m_key.as_u64;
+ if (!clib_bihash_search_8_8
+ (&sm->static_mapping_by_local, &kv, &value))
+ return VNET_API_ERROR_VALUE_EXIST;
+ }
/* Find external address in allocated addresses and reserve port for
address and port pair mapping when dynamic translations enabled */
if (!(addr_only || sm->static_mapping_only || out2in_only))
- {
- for (i = 0; i < vec_len (sm->addresses); i++)
- {
- if (sm->addresses[i].addr.as_u32 == e_addr.as_u32)
- {
- a = sm->addresses + i;
- /* External port must be unused */
- switch (proto)
- {
+ {
+ for (i = 0; i < vec_len (sm->addresses); i++)
+ {
+ if (sm->addresses[i].addr.as_u32 == e_addr.as_u32)
+ {
+ a = sm->addresses + i;
+ /* External port must be unused */
+ switch (proto)
+ {
#define _(N, j, n, s) \
case SNAT_PROTOCOL_##N: \
if (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, e_port)) \
a->busy_##n##_ports_per_thread[get_thread_idx_by_port(e_port)]++; \
} \
break;
- foreach_snat_protocol
+ foreach_snat_protocol
#undef _
- default:
- nat_log_info ("unknown protocol");
- return VNET_API_ERROR_INVALID_VALUE_2;
- }
- break;
- }
- }
- /* External address must be allocated */
- if (!a && (l_addr.as_u32 != e_addr.as_u32))
- {
- if (sw_if_index != ~0)
- {
- for (i = 0; i < vec_len (sm->to_resolve); i++)
- {
- rp = sm->to_resolve + i;
- if (rp->addr_only)
- continue;
- if (rp->sw_if_index != sw_if_index &&
- rp->l_addr.as_u32 != l_addr.as_u32 &&
- rp->vrf_id != vrf_id && rp->l_port != l_port &&
- rp->e_port != e_port && rp->proto != proto)
- continue;
-
- vec_del1 (sm->to_resolve, i);
- break;
- }
- }
- return VNET_API_ERROR_NO_SUCH_ENTRY;
- }
- }
+ default:
+ nat_log_info ("unknown protocol");
+ return VNET_API_ERROR_INVALID_VALUE_2;
+ }
+ break;
+ }
+ }
+ /* External address must be allocated */
+ if (!a && (l_addr.as_u32 != e_addr.as_u32))
+ {
+ if (sw_if_index != ~0)
+ {
+ for (i = 0; i < vec_len (sm->to_resolve); i++)
+ {
+ rp = sm->to_resolve + i;
+ if (rp->addr_only)
+ continue;
+ if (rp->sw_if_index != sw_if_index &&
+ rp->l_addr.as_u32 != l_addr.as_u32 &&
+ rp->vrf_id != vrf_id && rp->l_port != l_port &&
+ rp->e_port != e_port && rp->proto != proto)
+ continue;
+
+ vec_del1 (sm->to_resolve, i);
+ break;
+ }
+ }
+ return VNET_API_ERROR_NO_SUCH_ENTRY;
+ }
+ }
pool_get (sm->static_mappings, m);
memset (m, 0, sizeof (*m));
m->twice_nat = twice_nat;
m->out2in_only = out2in_only;
if (!addr_only)
- {
- m->local_port = l_port;
- m->external_port = e_port;
- m->proto = proto;
- }
+ {
+ m->local_port = l_port;
+ m->external_port = e_port;
+ m->proto = proto;
+ }
if (sm->num_workers > 1)
- {
- ip4_header_t ip = {
- .src_address = m->local_addr,
- };
- vec_add1 (m->workers, sm->worker_in2out_cb (&ip, m->fib_index));
- tsm = vec_elt_at_index (sm->per_thread_data, m->workers[0]);
- }
+ {
+ ip4_header_t ip = {
+ .src_address = m->local_addr,
+ };
+ vec_add1 (m->workers, sm->worker_in2out_cb (&ip, m->fib_index));
+ tsm = vec_elt_at_index (sm->per_thread_data, m->workers[0]);
+ }
else
- tsm = vec_elt_at_index (sm->per_thread_data, sm->num_workers);
+ tsm = vec_elt_at_index (sm->per_thread_data, sm->num_workers);
m_key.addr = m->local_addr;
m_key.port = m->local_port;
kv.key = m_key.as_u64;
kv.value = m - sm->static_mappings;
if (!out2in_only)
- clib_bihash_add_del_8_8(&sm->static_mapping_by_local, &kv, 1);
+ clib_bihash_add_del_8_8 (&sm->static_mapping_by_local, &kv, 1);
m_key.addr = m->external_addr;
m_key.port = m->external_port;
m_key.fib_index = 0;
kv.key = m_key.as_u64;
kv.value = m - sm->static_mappings;
- clib_bihash_add_del_8_8(&sm->static_mapping_by_external, &kv, 1);
+ clib_bihash_add_del_8_8 (&sm->static_mapping_by_external, &kv, 1);
/* Delete dynamic sessions matching local address (+ local port) */
if (!(sm->static_mapping_only))
- {
- u_key.addr = m->local_addr;
- u_key.fib_index = m->fib_index;
- kv.key = u_key.as_u64;
- if (!clib_bihash_search_8_8 (&tsm->user_hash, &kv, &value))
- {
- user_index = value.value;
- u = pool_elt_at_index (tsm->users, user_index);
- if (u->nsessions)
- {
- head_index = u->sessions_per_user_list_head_index;
- head = pool_elt_at_index (tsm->list_pool, head_index);
- elt_index = head->next;
- elt = pool_elt_at_index (tsm->list_pool, elt_index);
- ses_index = elt->value;
- while (ses_index != ~0)
- {
- s = pool_elt_at_index (tsm->sessions, ses_index);
- elt = pool_elt_at_index (tsm->list_pool, elt->next);
- ses_index = elt->value;
-
- if (snat_is_session_static (s))
- continue;
-
- if (!addr_only && (clib_net_to_host_u16 (s->in2out.port) != m->local_port))
- continue;
-
- nat_free_session_data (sm, s, tsm - sm->per_thread_data);
- nat44_delete_session (sm, s, tsm - sm->per_thread_data);
-
- if (!addr_only && !sm->endpoint_dependent)
- break;
- }
- }
- }
- }
+ {
+ u_key.addr = m->local_addr;
+ u_key.fib_index = m->fib_index;
+ kv.key = u_key.as_u64;
+ if (!clib_bihash_search_8_8 (&tsm->user_hash, &kv, &value))
+ {
+ user_index = value.value;
+ u = pool_elt_at_index (tsm->users, user_index);
+ if (u->nsessions)
+ {
+ head_index = u->sessions_per_user_list_head_index;
+ head = pool_elt_at_index (tsm->list_pool, head_index);
+ elt_index = head->next;
+ elt = pool_elt_at_index (tsm->list_pool, elt_index);
+ ses_index = elt->value;
+ while (ses_index != ~0)
+ {
+ s = pool_elt_at_index (tsm->sessions, ses_index);
+ elt = pool_elt_at_index (tsm->list_pool, elt->next);
+ ses_index = elt->value;
+
+ if (snat_is_session_static (s))
+ continue;
+
+ if (!addr_only
+ && (clib_net_to_host_u16 (s->in2out.port) !=
+ m->local_port))
+ continue;
+
+ nat_free_session_data (sm, s,
+ tsm - sm->per_thread_data);
+ nat44_delete_session (sm, s, tsm - sm->per_thread_data);
+
+ if (!addr_only && !sm->endpoint_dependent)
+ break;
+ }
+ }
+ }
+ }
}
else
{
if (!m)
- {
- if (sw_if_index != ~0)
- return 0;
- else
- return VNET_API_ERROR_NO_SUCH_ENTRY;
- }
+ {
+ if (sw_if_index != ~0)
+ return 0;
+ else
+ return VNET_API_ERROR_NO_SUCH_ENTRY;
+ }
/* Free external address port */
if (!(addr_only || sm->static_mapping_only || out2in_only))
- {
- for (i = 0; i < vec_len (sm->addresses); i++)
- {
- if (sm->addresses[i].addr.as_u32 == e_addr.as_u32)
- {
- a = sm->addresses + i;
- switch (proto)
- {
+ {
+ for (i = 0; i < vec_len (sm->addresses); i++)
+ {
+ if (sm->addresses[i].addr.as_u32 == e_addr.as_u32)
+ {
+ a = sm->addresses + i;
+ switch (proto)
+ {
#define _(N, j, n, s) \
case SNAT_PROTOCOL_##N: \
clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, e_port, 0); \
a->busy_##n##_ports_per_thread[get_thread_idx_by_port(e_port)]--; \
} \
break;
- foreach_snat_protocol
+ foreach_snat_protocol
#undef _
- default:
- nat_log_info ("unknown protocol");
- return VNET_API_ERROR_INVALID_VALUE_2;
- }
- break;
- }
- }
- }
+ default:
+ nat_log_info ("unknown protocol");
+ return VNET_API_ERROR_INVALID_VALUE_2;
+ }
+ break;
+ }
+ }
+ }
if (sm->num_workers > 1)
- tsm = vec_elt_at_index (sm->per_thread_data, m->workers[0]);
+ tsm = vec_elt_at_index (sm->per_thread_data, m->workers[0]);
else
- tsm = vec_elt_at_index (sm->per_thread_data, sm->num_workers);
+ tsm = vec_elt_at_index (sm->per_thread_data, sm->num_workers);
m_key.addr = m->local_addr;
m_key.port = m->local_port;
m_key.fib_index = m->fib_index;
kv.key = m_key.as_u64;
if (!out2in_only)
- clib_bihash_add_del_8_8(&sm->static_mapping_by_local, &kv, 0);
+ clib_bihash_add_del_8_8 (&sm->static_mapping_by_local, &kv, 0);
m_key.addr = m->external_addr;
m_key.port = m->external_port;
m_key.fib_index = 0;
kv.key = m_key.as_u64;
- clib_bihash_add_del_8_8(&sm->static_mapping_by_external, &kv, 0);
+ clib_bihash_add_del_8_8 (&sm->static_mapping_by_external, &kv, 0);
/* Delete session(s) for static mapping if exist */
if (!(sm->static_mapping_only) ||
- (sm->static_mapping_only && sm->static_mapping_connection_tracking))
- {
- u_key.addr = m->local_addr;
- u_key.fib_index = m->fib_index;
- kv.key = u_key.as_u64;
- if (!clib_bihash_search_8_8 (&tsm->user_hash, &kv, &value))
- {
- user_index = value.value;
- u = pool_elt_at_index (tsm->users, user_index);
- if (u->nstaticsessions)
- {
- head_index = u->sessions_per_user_list_head_index;
- head = pool_elt_at_index (tsm->list_pool, head_index);
- elt_index = head->next;
- elt = pool_elt_at_index (tsm->list_pool, elt_index);
- ses_index = elt->value;
- while (ses_index != ~0)
- {
- s = pool_elt_at_index (tsm->sessions, ses_index);
- elt = pool_elt_at_index (tsm->list_pool, elt->next);
- ses_index = elt->value;
-
- if (!addr_only)
- {
- if ((s->out2in.addr.as_u32 != e_addr.as_u32) ||
- (clib_net_to_host_u16 (s->out2in.port) != e_port))
- continue;
- }
-
- if (is_lb_session (s))
- continue;
-
- if (!snat_is_session_static (s))
- continue;
-
- nat_free_session_data (sm, s, tsm - sm->per_thread_data);
- nat44_delete_session (sm, s, tsm - sm->per_thread_data);
-
- if (!addr_only && !sm->endpoint_dependent)
- break;
- }
- }
- }
- }
+ (sm->static_mapping_only && sm->static_mapping_connection_tracking))
+ {
+ u_key.addr = m->local_addr;
+ u_key.fib_index = m->fib_index;
+ kv.key = u_key.as_u64;
+ if (!clib_bihash_search_8_8 (&tsm->user_hash, &kv, &value))
+ {
+ user_index = value.value;
+ u = pool_elt_at_index (tsm->users, user_index);
+ if (u->nstaticsessions)
+ {
+ head_index = u->sessions_per_user_list_head_index;
+ head = pool_elt_at_index (tsm->list_pool, head_index);
+ elt_index = head->next;
+ elt = pool_elt_at_index (tsm->list_pool, elt_index);
+ ses_index = elt->value;
+ while (ses_index != ~0)
+ {
+ s = pool_elt_at_index (tsm->sessions, ses_index);
+ elt = pool_elt_at_index (tsm->list_pool, elt->next);
+ ses_index = elt->value;
+
+ if (!addr_only)
+ {
+ if ((s->out2in.addr.as_u32 != e_addr.as_u32) ||
+ (clib_net_to_host_u16 (s->out2in.port) !=
+ e_port))
+ continue;
+ }
+
+ if (is_lb_session (s))
+ continue;
+
+ if (!snat_is_session_static (s))
+ continue;
+
+ nat_free_session_data (sm, s,
+ tsm - sm->per_thread_data);
+ nat44_delete_session (sm, s, tsm - sm->per_thread_data);
+
+ if (!addr_only && !sm->endpoint_dependent)
+ break;
+ }
+ }
+ }
+ }
vec_free (m->tag);
vec_free (m->workers);
return 0;
/* Add/delete external address to FIB */
+ /* *INDENT-OFF* */
pool_foreach (interface, sm->interfaces,
({
if (nat_interface_is_inside(interface) || sm->out2in_dpo)
snat_add_del_addr_to_fib(&e_addr, 32, interface->sw_if_index, is_add);
break;
}));
+ /* *INDENT-ON* */
return 0;
}
-int nat44_add_del_lb_static_mapping (ip4_address_t e_addr, u16 e_port,
- snat_protocol_t proto,
- nat44_lb_addr_port_t *locals, u8 is_add,
- twice_nat_type_t twice_nat, u8 out2in_only,
- u8 *tag, u32 affinity)
+int
+nat44_add_del_lb_static_mapping (ip4_address_t e_addr, u16 e_port,
+ snat_protocol_t proto,
+ nat44_lb_addr_port_t * locals, u8 is_add,
+ twice_nat_type_t twice_nat, u8 out2in_only,
+ u8 * tag, u32 affinity)
{
- snat_main_t * sm = &snat_main;
+ snat_main_t *sm = &snat_main;
snat_static_mapping_t *m;
snat_session_key_t m_key;
clib_bihash_kv_8_8_t kv, value;
snat_main_per_thread_data_t *tsm;
snat_user_key_t u_key;
snat_user_t *u;
- snat_session_t * s;
- dlist_elt_t * head, * elt;
+ snat_session_t *s;
+ dlist_elt_t *head, *elt;
uword *bitmap = 0;
if (!sm->endpoint_dependent)
if (is_add)
{
if (m)
- return VNET_API_ERROR_VALUE_EXIST;
+ return VNET_API_ERROR_VALUE_EXIST;
if (vec_len (locals) < 2)
- return VNET_API_ERROR_INVALID_VALUE;
+ return VNET_API_ERROR_INVALID_VALUE;
/* Find external address in allocated addresses and reserve port for
address and port pair mapping when dynamic translations enabled */
if (!(sm->static_mapping_only || out2in_only))
- {
- for (i = 0; i < vec_len (sm->addresses); i++)
- {
- if (sm->addresses[i].addr.as_u32 == e_addr.as_u32)
- {
- a = sm->addresses + i;
- /* External port must be unused */
- switch (proto)
- {
+ {
+ for (i = 0; i < vec_len (sm->addresses); i++)
+ {
+ if (sm->addresses[i].addr.as_u32 == e_addr.as_u32)
+ {
+ a = sm->addresses + i;
+ /* External port must be unused */
+ switch (proto)
+ {
#define _(N, j, n, s) \
case SNAT_PROTOCOL_##N: \
if (clib_bitmap_get_no_check (a->busy_##n##_port_bitmap, e_port)) \
a->busy_##n##_ports_per_thread[get_thread_idx_by_port(e_port)]++; \
} \
break;
- foreach_snat_protocol
+ foreach_snat_protocol
#undef _
- default:
- nat_log_info ("unknown protocol");
- return VNET_API_ERROR_INVALID_VALUE_2;
- }
- break;
- }
- }
- /* External address must be allocated */
- if (!a)
- return VNET_API_ERROR_NO_SUCH_ENTRY;
- }
+ default:
+ nat_log_info ("unknown protocol");
+ return VNET_API_ERROR_INVALID_VALUE_2;
+ }
+ break;
+ }
+ }
+ /* External address must be allocated */
+ if (!a)
+ return VNET_API_ERROR_NO_SUCH_ENTRY;
+ }
pool_get (sm->static_mappings, m);
memset (m, 0, sizeof (*m));
m->affinity = affinity;
if (affinity)
- m->affinity_per_service_list_head_index =
- nat_affinity_get_per_service_list_head_index();
+ m->affinity_per_service_list_head_index =
+ nat_affinity_get_per_service_list_head_index ();
else
- m->affinity_per_service_list_head_index = ~0;
+ m->affinity_per_service_list_head_index = ~0;
m_key.addr = m->external_addr;
m_key.port = m->external_port;
m_key.fib_index = 0;
kv.key = m_key.as_u64;
kv.value = m - sm->static_mappings;
- if (clib_bihash_add_del_8_8(&sm->static_mapping_by_external, &kv, 1))
- {
- nat_log_err ("static_mapping_by_external key add failed");
- return VNET_API_ERROR_UNSPECIFIED;
- }
+ if (clib_bihash_add_del_8_8 (&sm->static_mapping_by_external, &kv, 1))
+ {
+ nat_log_err ("static_mapping_by_external key add failed");
+ return VNET_API_ERROR_UNSPECIFIED;
+ }
m_key.fib_index = m->fib_index;
for (i = 0; i < vec_len (locals); i++)
- {
- locals[i].fib_index = fib_table_find_or_create_and_lock (
- FIB_PROTOCOL_IP4, locals[i].vrf_id, FIB_SOURCE_PLUGIN_LOW);
- m_key.addr = locals[i].addr;
- m_key.fib_index = locals[i].fib_index;
- if (!out2in_only)
- {
- m_key.port = locals[i].port;
- kv.key = m_key.as_u64;
- kv.value = m - sm->static_mappings;
- clib_bihash_add_del_8_8(&sm->static_mapping_by_local, &kv, 1);
- }
- locals[i].prefix = (i == 0) ? locals[i].probability :\
- (locals[i - 1].prefix + locals[i].probability);
- vec_add1 (m->locals, locals[i]);
- if (sm->num_workers > 1)
- {
- ip4_header_t ip = {
- .src_address = locals[i].addr,
- };
- bitmap = clib_bitmap_set (
- bitmap, sm->worker_in2out_cb (&ip, m->fib_index), 1);
- }
- }
+ {
+ locals[i].fib_index =
+ fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP4,
+ locals[i].vrf_id,
+ FIB_SOURCE_PLUGIN_LOW);
+ m_key.addr = locals[i].addr;
+ m_key.fib_index = locals[i].fib_index;
+ if (!out2in_only)
+ {
+ m_key.port = locals[i].port;
+ kv.key = m_key.as_u64;
+ kv.value = m - sm->static_mappings;
+ clib_bihash_add_del_8_8 (&sm->static_mapping_by_local, &kv, 1);
+ }
+ locals[i].prefix = (i == 0) ? locals[i].probability :
+ (locals[i - 1].prefix + locals[i].probability);
+ vec_add1 (m->locals, locals[i]);
+ if (sm->num_workers > 1)
+ {
+ ip4_header_t ip = {
+ .src_address = locals[i].addr,
+ };
+ bitmap =
+ clib_bitmap_set (bitmap,
+ sm->worker_in2out_cb (&ip, m->fib_index), 1);
+ }
+ }
/* Assign workers */
if (sm->num_workers > 1)
- {
+ {
+ /* *INDENT-OFF* */
clib_bitmap_foreach (i, bitmap,
({
vec_add1(m->workers, i);
}));
- }
+ /* *INDENT-ON* */
+ }
}
else
{
if (!m)
- return VNET_API_ERROR_NO_SUCH_ENTRY;
+ return VNET_API_ERROR_NO_SUCH_ENTRY;
/* Free external address port */
if (!(sm->static_mapping_only || out2in_only))
- {
- for (i = 0; i < vec_len (sm->addresses); i++)
- {
- if (sm->addresses[i].addr.as_u32 == e_addr.as_u32)
- {
- a = sm->addresses + i;
- switch (proto)
- {
+ {
+ for (i = 0; i < vec_len (sm->addresses); i++)
+ {
+ if (sm->addresses[i].addr.as_u32 == e_addr.as_u32)
+ {
+ a = sm->addresses + i;
+ switch (proto)
+ {
#define _(N, j, n, s) \
case SNAT_PROTOCOL_##N: \
clib_bitmap_set_no_check (a->busy_##n##_port_bitmap, e_port, 0); \
a->busy_##n##_ports_per_thread[get_thread_idx_by_port(e_port)]--; \
} \
break;
- foreach_snat_protocol
+ foreach_snat_protocol
#undef _
- default:
- nat_log_info ("unknown protocol");
- return VNET_API_ERROR_INVALID_VALUE_2;
- }
- break;
- }
- }
- }
+ default:
+ nat_log_info ("unknown protocol");
+ return VNET_API_ERROR_INVALID_VALUE_2;
+ }
+ break;
+ }
+ }
+ }
m_key.addr = m->external_addr;
m_key.port = m->external_port;
m_key.protocol = m->proto;
m_key.fib_index = 0;
kv.key = m_key.as_u64;
- if (clib_bihash_add_del_8_8(&sm->static_mapping_by_external, &kv, 0))
- {
- nat_log_err ("static_mapping_by_external key del failed");
- return VNET_API_ERROR_UNSPECIFIED;
- }
+ if (clib_bihash_add_del_8_8 (&sm->static_mapping_by_external, &kv, 0))
+ {
+ nat_log_err ("static_mapping_by_external key del failed");
+ return VNET_API_ERROR_UNSPECIFIED;
+ }
+ /* *INDENT-OFF* */
vec_foreach (local, m->locals)
{
fib_table_unlock (local->fib_index, FIB_PROTOCOL_IP4,
}
}
}
+ /* *INDENT-ON* */
if (m->affinity)
- nat_affinity_flush_service (m->affinity_per_service_list_head_index);
- vec_free(m->locals);
- vec_free(m->tag);
- vec_free(m->workers);
+ nat_affinity_flush_service (m->affinity_per_service_list_head_index);
+ vec_free (m->locals);
+ vec_free (m->tag);
+ vec_free (m->workers);
pool_put (sm->static_mappings, m);
}
}
int
-snat_del_address (snat_main_t *sm, ip4_address_t addr, u8 delete_sm,
- u8 twice_nat)
+snat_del_address (snat_main_t * sm, ip4_address_t addr, u8 delete_sm,
+ u8 twice_nat)
{
snat_address_t *a = 0;
snat_session_t *ses;
snat_static_mapping_t *m;
snat_interface_t *interface;
int i;
- snat_address_t *addresses = twice_nat ? sm->twice_nat_addresses : sm->addresses;
+ snat_address_t *addresses =
+ twice_nat ? sm->twice_nat_addresses : sm->addresses;
/* Find SNAT address */
- for (i=0; i < vec_len (addresses); i++)
+ for (i = 0; i < vec_len (addresses); i++)
{
if (addresses[i].addr.as_u32 == addr.as_u32)
- {
- a = addresses + i;
- break;
- }
+ {
+ a = addresses + i;
+ break;
+ }
}
if (!a)
return VNET_API_ERROR_NO_SUCH_ENTRY;
if (delete_sm)
{
+ /* *INDENT-OFF* */
pool_foreach (m, sm->static_mappings,
({
if (m->external_addr.as_u32 == addr.as_u32)
m->proto, 0, m->twice_nat,
m->out2in_only, m->tag);
}));
+ /* *INDENT-ON* */
}
else
{
/* Check if address is used in some static mapping */
- if (is_snat_address_used_in_static_mapping(sm, addr))
- {
- nat_log_notice ("address used in static mapping");
- return VNET_API_ERROR_UNSPECIFIED;
- }
+ if (is_snat_address_used_in_static_mapping (sm, addr))
+ {
+ nat_log_notice ("address used in static mapping");
+ return VNET_API_ERROR_UNSPECIFIED;
+ }
}
if (a->fib_index != ~0)
- fib_table_unlock(a->fib_index, FIB_PROTOCOL_IP4,
- FIB_SOURCE_PLUGIN_LOW);
+ fib_table_unlock (a->fib_index, FIB_PROTOCOL_IP4, FIB_SOURCE_PLUGIN_LOW);
/* Delete sessions using address */
if (a->busy_tcp_ports || a->busy_udp_ports || a->busy_icmp_ports)
{
+ /* *INDENT-OFF* */
vec_foreach (tsm, sm->per_thread_data)
{
pool_foreach (ses, tsm->sessions, ({
if (ses->out2in.addr.as_u32 == addr.as_u32)
{
- ses->outside_address_index = ~0;
nat_free_session_data (sm, ses, tsm - sm->per_thread_data);
vec_add1 (ses_to_be_removed, ses - tsm->sessions);
}
}
vec_free (ses_to_be_removed);
- }
+ }
+ /* *INDENT-ON* */
}
#define _(N, i, n, s) \
vec_free (a->busy_##n##_ports_per_thread);
foreach_snat_protocol
#undef _
-
- if (twice_nat)
+ if (twice_nat)
{
vec_del1 (sm->twice_nat_addresses, i);
return 0;
vec_del1 (sm->addresses, i);
/* Delete external address from FIB */
+ /* *INDENT-OFF* */
pool_foreach (interface, sm->interfaces,
({
if (nat_interface_is_inside(interface) || sm->out2in_dpo)
snat_add_del_addr_to_fib(&addr, 32, interface->sw_if_index, 0);
break;
}));
+ /* *INDENT-ON* */
return 0;
}
-int snat_interface_add_del (u32 sw_if_index, u8 is_inside, int is_del)
+int
+snat_interface_add_del (u32 sw_if_index, u8 is_inside, int is_del)
{
snat_main_t *sm = &snat_main;
snat_interface_t *i;
- const char * feature_name, *del_feature_name;
- snat_address_t * ap;
- snat_static_mapping_t * m;
- snat_det_map_t * dm;
+ const char *feature_name, *del_feature_name;
+ snat_address_t *ap;
+ snat_static_mapping_t *m;
+ snat_det_map_t *dm;
nat_outside_fib_t *outside_fib;
u32 fib_index = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
- sw_if_index);
+ sw_if_index);
if (sm->out2in_dpo && !is_inside)
return VNET_API_ERROR_UNSUPPORTED;
+ /* *INDENT-OFF* */
pool_foreach (i, sm->output_feature_interfaces,
({
if (i->sw_if_index == sw_if_index)
return VNET_API_ERROR_VALUE_EXIST;
}));
+ /* *INDENT-ON* */
if (sm->static_mapping_only && !(sm->static_mapping_connection_tracking))
- feature_name = is_inside ? "nat44-in2out-fast" : "nat44-out2in-fast";
+ feature_name = is_inside ? "nat44-in2out-fast" : "nat44-out2in-fast";
else
{
if (sm->num_workers > 1 && !sm->deterministic)
- feature_name = is_inside ? "nat44-in2out-worker-handoff" : "nat44-out2in-worker-handoff";
+ feature_name =
+ is_inside ? "nat44-in2out-worker-handoff" :
+ "nat44-out2in-worker-handoff";
else if (sm->deterministic)
- feature_name = is_inside ? "nat44-det-in2out" : "nat44-det-out2in";
+ feature_name = is_inside ? "nat44-det-in2out" : "nat44-det-out2in";
else if (sm->endpoint_dependent)
- feature_name = is_inside ? "nat44-ed-in2out" : "nat44-ed-out2in";
+ feature_name = is_inside ? "nat44-ed-in2out" : "nat44-ed-out2in";
else
- feature_name = is_inside ? "nat44-in2out" : "nat44-out2in";
+ feature_name = is_inside ? "nat44-in2out" : "nat44-out2in";
}
if (sm->fq_in2out_index == ~0 && !sm->deterministic && sm->num_workers > 1)
sm->fq_in2out_index = vlib_frame_queue_main_init (sm->in2out_node_index,
- NAT_FQ_NELTS);
+ NAT_FQ_NELTS);
if (sm->fq_out2in_index == ~0 && !sm->deterministic && sm->num_workers > 1)
sm->fq_out2in_index = vlib_frame_queue_main_init (sm->out2in_node_index,
- NAT_FQ_NELTS);
+ NAT_FQ_NELTS);
if (!is_inside)
{
+ /* *INDENT-OFF* */
vec_foreach (outside_fib, sm->outside_fibs)
{
if (outside_fib->fib_index == fib_index)
goto feature_set;
}
}
+ /* *INDENT-ON* */
if (!is_del)
- {
- vec_add2 (sm->outside_fibs, outside_fib, 1);
- outside_fib->refcount = 1;
- outside_fib->fib_index = fib_index;
- }
+ {
+ vec_add2 (sm->outside_fibs, outside_fib, 1);
+ outside_fib->refcount = 1;
+ outside_fib->fib_index = fib_index;
+ }
}
feature_set:
+ /* *INDENT-OFF* */
pool_foreach (i, sm->interfaces,
({
if (i->sw_if_index == sw_if_index)
goto fib;
}
}));
+ /* *INDENT-ON* */
if (is_del)
return VNET_API_ERROR_NO_SUCH_ENTRY;
pool_get (sm->interfaces, i);
i->sw_if_index = sw_if_index;
i->flags = 0;
- vnet_feature_enable_disable ("ip4-unicast", feature_name, sw_if_index, 1, 0, 0);
+ vnet_feature_enable_disable ("ip4-unicast", feature_name, sw_if_index, 1, 0,
+ 0);
if (is_inside && !sm->out2in_dpo)
{
if (sm->endpoint_dependent)
- vnet_feature_enable_disable ("ip4-local", "nat44-ed-hairpinning",
- sw_if_index, 1, 0, 0);
+ vnet_feature_enable_disable ("ip4-local", "nat44-ed-hairpinning",
+ sw_if_index, 1, 0, 0);
else if (!sm->deterministic)
- vnet_feature_enable_disable ("ip4-local", "nat44-hairpinning",
- sw_if_index, 1, 0, 0);
+ vnet_feature_enable_disable ("ip4-local", "nat44-hairpinning",
+ sw_if_index, 1, 0, 0);
}
set_flags:
/* Add/delete external addresses to FIB */
fib:
+ /* *INDENT-OFF* */
vec_foreach (ap, sm->addresses)
snat_add_del_addr_to_fib(&ap->addr, 32, sw_if_index, !is_del);
({
snat_add_del_addr_to_fib(&dm->out_addr, dm->out_plen, sw_if_index, !is_del);
}));
+ /* *INDENT-ON* */
return 0;
}
-int snat_interface_add_del_output_feature (u32 sw_if_index,
- u8 is_inside,
- int is_del)
+int
+snat_interface_add_del_output_feature (u32 sw_if_index,
+ u8 is_inside, int is_del)
{
snat_main_t *sm = &snat_main;
snat_interface_t *i;
- snat_address_t * ap;
- snat_static_mapping_t * m;
+ snat_address_t *ap;
+ snat_static_mapping_t *m;
if (sm->deterministic ||
(sm->static_mapping_only && !(sm->static_mapping_connection_tracking)))
return VNET_API_ERROR_UNSUPPORTED;
+ /* *INDENT-OFF* */
pool_foreach (i, sm->interfaces,
({
if (i->sw_if_index == sw_if_index)
return VNET_API_ERROR_VALUE_EXIST;
}));
+ /* *INDENT-ON* */
if (is_inside)
{
if (sm->endpoint_dependent)
- {
- vnet_feature_enable_disable ("ip4-unicast", "nat44-ed-hairpin-dst",
- sw_if_index, !is_del, 0, 0);
- vnet_feature_enable_disable ("ip4-output", "nat44-ed-hairpin-src",
- sw_if_index, !is_del, 0, 0);
- }
+ {
+ vnet_feature_enable_disable ("ip4-unicast", "nat44-ed-hairpin-dst",
+ sw_if_index, !is_del, 0, 0);
+ vnet_feature_enable_disable ("ip4-output", "nat44-ed-hairpin-src",
+ sw_if_index, !is_del, 0, 0);
+ }
else
- {
- vnet_feature_enable_disable ("ip4-unicast", "nat44-hairpin-dst",
- sw_if_index, !is_del, 0, 0);
- vnet_feature_enable_disable ("ip4-output", "nat44-hairpin-src",
- sw_if_index, !is_del, 0, 0);
- }
+ {
+ vnet_feature_enable_disable ("ip4-unicast", "nat44-hairpin-dst",
+ sw_if_index, !is_del, 0, 0);
+ vnet_feature_enable_disable ("ip4-output", "nat44-hairpin-src",
+ sw_if_index, !is_del, 0, 0);
+ }
goto fq;
}
if (sm->num_workers > 1)
{
vnet_feature_enable_disable ("ip4-unicast",
- "nat44-out2in-worker-handoff",
- sw_if_index, !is_del, 0, 0);
+ "nat44-out2in-worker-handoff",
+ sw_if_index, !is_del, 0, 0);
vnet_feature_enable_disable ("ip4-output",
- "nat44-in2out-output-worker-handoff",
- sw_if_index, !is_del, 0, 0);
+ "nat44-in2out-output-worker-handoff",
+ sw_if_index, !is_del, 0, 0);
}
else
{
if (sm->endpoint_dependent)
- {
- vnet_feature_enable_disable ("ip4-unicast", "nat44-ed-out2in",
- sw_if_index, !is_del, 0, 0);
- vnet_feature_enable_disable ("ip4-output", "nat44-ed-in2out-output",
- sw_if_index, !is_del, 0, 0);
- }
+ {
+ vnet_feature_enable_disable ("ip4-unicast", "nat44-ed-out2in",
+ sw_if_index, !is_del, 0, 0);
+ vnet_feature_enable_disable ("ip4-output", "nat44-ed-in2out-output",
+ sw_if_index, !is_del, 0, 0);
+ }
else
- {
- vnet_feature_enable_disable ("ip4-unicast", "nat44-out2in",
- sw_if_index, !is_del, 0, 0);
- vnet_feature_enable_disable ("ip4-output", "nat44-in2out-output",
- sw_if_index, !is_del, 0, 0);
- }
+ {
+ vnet_feature_enable_disable ("ip4-unicast", "nat44-out2in",
+ sw_if_index, !is_del, 0, 0);
+ vnet_feature_enable_disable ("ip4-output", "nat44-in2out-output",
+ sw_if_index, !is_del, 0, 0);
+ }
}
fq:
vlib_frame_queue_main_init (sm->in2out_output_node_index, 0);
if (sm->fq_out2in_index == ~0 && sm->num_workers > 1)
- sm->fq_out2in_index = vlib_frame_queue_main_init (sm->out2in_node_index, 0);
+ sm->fq_out2in_index =
+ vlib_frame_queue_main_init (sm->out2in_node_index, 0);
+ /* *INDENT-OFF* */
pool_foreach (i, sm->output_feature_interfaces,
({
if (i->sw_if_index == sw_if_index)
goto fib;
}
}));
+ /* *INDENT-ON* */
if (is_del)
return VNET_API_ERROR_NO_SUCH_ENTRY;
if (is_inside)
return 0;
+ /* *INDENT-OFF* */
vec_foreach (ap, sm->addresses)
snat_add_del_addr_to_fib(&ap->addr, 32, sw_if_index, !is_del);
snat_add_del_addr_to_fib(&m->external_addr, 32, sw_if_index, !is_del);
}));
+ /* *INDENT-ON* */
return 0;
}
-int snat_set_workers (uword * bitmap)
+int
+snat_set_workers (uword * bitmap)
{
snat_main_t *sm = &snat_main;
int i, j = 0;
return VNET_API_ERROR_INVALID_WORKER;
vec_free (sm->workers);
+ /* *INDENT-OFF* */
clib_bitmap_foreach (i, bitmap,
({
vec_add1(sm->workers, i);
sm->per_thread_data[sm->first_worker_index + i].snat_thread_index = j;
j++;
}));
+ /* *INDENT-ON* */
sm->port_per_thread = (0xffff - 1024) / _vec_len (sm->workers);
sm->num_snat_thread = _vec_len (sm->workers);
static void
snat_ip4_add_del_interface_address_cb (ip4_main_t * im,
- uword opaque,
- u32 sw_if_index,
- ip4_address_t * address,
- u32 address_length,
- u32 if_address_index,
- u32 is_delete);
+ uword opaque,
+ u32 sw_if_index,
+ ip4_address_t * address,
+ u32 address_length,
+ u32 if_address_index, u32 is_delete);
static void
nat_ip4_add_del_addr_only_sm_cb (ip4_main_t * im,
- uword opaque,
- u32 sw_if_index,
- ip4_address_t * address,
- u32 address_length,
- u32 if_address_index,
- u32 is_delete);
+ uword opaque,
+ u32 sw_if_index,
+ ip4_address_t * address,
+ u32 address_length,
+ u32 if_address_index, u32 is_delete);
static int
nat_alloc_addr_and_port_default (snat_address_t * addresses,
- u32 fib_index,
- u32 thread_index,
- snat_session_key_t * k,
- u32 * address_indexp,
- u16 port_per_thread,
- u32 snat_thread_index);
-
-static clib_error_t * snat_init (vlib_main_t * vm)
+ u32 fib_index,
+ u32 thread_index,
+ snat_session_key_t * k,
+ u16 port_per_thread, u32 snat_thread_index);
+
+static clib_error_t *
+snat_init (vlib_main_t * vm)
{
- snat_main_t * sm = &snat_main;
- clib_error_t * error = 0;
- ip4_main_t * im = &ip4_main;
- ip_lookup_main_t * lm = &im->lookup_main;
+ snat_main_t *sm = &snat_main;
+ clib_error_t *error = 0;
+ ip4_main_t *im = &ip4_main;
+ ip_lookup_main_t *lm = &im->lookup_main;
uword *p;
vlib_thread_registration_t *tr;
vlib_thread_main_t *tm = vlib_get_thread_main ();
uword *bitmap = 0;
u32 i;
ip4_add_del_interface_address_callback_t cb4;
- vlib_node_t * error_drop_node;
+ vlib_node_t *error_drop_node;
sm->vlib_main = vm;
- sm->vnet_main = vnet_get_main();
+ sm->vnet_main = vnet_get_main ();
sm->ip4_main = im;
sm->ip4_lookup_main = lm;
sm->api_main = &api_main;
{
tr = (vlib_thread_registration_t *) p[0];
if (tr)
- {
- sm->num_workers = tr->count;
- sm->first_worker_index = tr->first_index;
- }
+ {
+ sm->num_workers = tr->count;
+ sm->first_worker_index = tr->first_index;
+ }
}
vec_validate (sm->per_thread_data, tm->n_vlib_mains - 1);
/* Use all available workers by default */
if (sm->num_workers > 1)
{
- for (i=0; i < sm->num_workers; i++)
- bitmap = clib_bitmap_set (bitmap, i, 1);
- snat_set_workers(bitmap);
+ for (i = 0; i < sm->num_workers; i++)
+ bitmap = clib_bitmap_set (bitmap, i, 1);
+ snat_set_workers (bitmap);
clib_bitmap_free (bitmap);
}
else
sm->per_thread_data[0].snat_thread_index = 0;
}
- error = snat_api_init(vm, sm);
+ error = snat_api_init (vm, sm);
if (error)
return error;
nat_dpo_module_init ();
/* Init IPFIX logging */
- snat_ipfix_logging_init(vm);
+ snat_ipfix_logging_init (vm);
/* Init NAT64 */
- error = nat64_init(vm);
+ error = nat64_init (vm);
if (error)
return error;
- dslite_init(vm);
+ dslite_init (vm);
- nat66_init();
+ nat66_init ();
/* Init virtual fragmenentation reassembly */
- return nat_reass_init(vm);
+ return nat_reass_init (vm);
}
VLIB_INIT_FUNCTION (snat_init);
-void snat_free_outside_address_and_port (snat_address_t * addresses,
- u32 thread_index,
- snat_session_key_t * k)
+void
+snat_free_outside_address_and_port (snat_address_t * addresses,
+ u32 thread_index, snat_session_key_t * k)
{
snat_address_t *a;
u32 address_index;
u16 port_host_byte_order = clib_net_to_host_u16 (k->port);
- for (address_index = 0; address_index < vec_len (addresses); address_index++)
+ for (address_index = 0; address_index < vec_len (addresses);
+ address_index++)
{
if (addresses[address_index].addr.as_u32 == k->addr.as_u32)
- break;
+ break;
}
ASSERT (address_index < vec_len (addresses));
}
}
-/**
- * @brief Match NAT44 static mapping.
- *
- * @param sm NAT main.
- * @param match Address and port to match.
- * @param mapping External or local address and port of the matched mapping.
- * @param by_external If 0 match by local address otherwise match by external
- * address.
- * @param is_addr_only If matched mapping is address only
- * @param twice_nat If matched mapping is twice NAT.
- * @param lb If matched mapping is load-balanced.
- *
- * @returns 0 if match found otherwise 1.
- */
-int snat_static_mapping_match (snat_main_t * sm,
- snat_session_key_t match,
- snat_session_key_t * mapping,
- u8 by_external,
- u8 *is_addr_only,
- twice_nat_type_t *twice_nat,
- lb_nat_type_t *lb,
- ip4_address_t * ext_host_addr)
+int
+snat_static_mapping_match (snat_main_t * sm,
+ snat_session_key_t match,
+ snat_session_key_t * mapping,
+ u8 by_external,
+ u8 * is_addr_only,
+ twice_nat_type_t * twice_nat,
+ lb_nat_type_t * lb, ip4_address_t * ext_host_addr)
{
clib_bihash_kv_8_8_t kv, value;
snat_static_mapping_t *m;
m_key.protocol = 0;
kv.key = m_key.as_u64;
if (clib_bihash_search_8_8 (mapping_hash, &kv, &value))
- return 1;
+ return 1;
}
m = pool_elt_at_index (sm->static_mappings, value.value);
if (by_external)
{
if (vec_len (m->locals))
- {
- if (PREDICT_FALSE(lb != 0))
- *lb = m->affinity ? AFFINITY_LB_NAT : LB_NAT;
- if (m->affinity)
- {
- if (nat_affinity_find_and_lock (ext_host_addr[0], match.addr,
- match.protocol, match.port, &backend_index))
- goto get_local;
-
- mapping->addr = m->locals[backend_index].addr;
- mapping->port = clib_host_to_net_u16 (m->locals[backend_index].port);
- mapping->fib_index = m->locals[backend_index].fib_index;
- goto end;
- }
-get_local:
- hi = vec_len (m->locals) - 1;
- rand = 1 + (random_u32 (&sm->random_seed) % m->locals[hi].prefix);
- while (lo < hi)
- {
- mid = ((hi - lo) >> 1) + lo;
- (rand > m->locals[mid].prefix) ? (lo = mid + 1) : (hi = mid);
- }
- if (!(m->locals[lo].prefix >= rand))
- return 1;
- if (PREDICT_FALSE (sm->num_workers > 1))
- {
- ip4_header_t ip = {
- .src_address = m->locals[lo].addr,
- };
- if (sm->worker_in2out_cb (&ip, m->fib_index) != vlib_get_thread_index ())
- goto get_local;
- }
- mapping->addr = m->locals[lo].addr;
- mapping->port = clib_host_to_net_u16 (m->locals[lo].port);
- mapping->fib_index = m->locals[lo].fib_index;
- if (m->affinity)
- {
- if (nat_affinity_create_and_lock (ext_host_addr[0], match.addr,
- match.protocol, match.port, lo, m->affinity,
- m->affinity_per_service_list_head_index))
- nat_log_info ("create affinity record failed");
- }
- }
+ {
+ if (PREDICT_FALSE (lb != 0))
+ *lb = m->affinity ? AFFINITY_LB_NAT : LB_NAT;
+ if (m->affinity)
+ {
+ if (nat_affinity_find_and_lock (ext_host_addr[0], match.addr,
+ match.protocol, match.port,
+ &backend_index))
+ goto get_local;
+
+ mapping->addr = m->locals[backend_index].addr;
+ mapping->port =
+ clib_host_to_net_u16 (m->locals[backend_index].port);
+ mapping->fib_index = m->locals[backend_index].fib_index;
+ goto end;
+ }
+ get_local:
+ hi = vec_len (m->locals) - 1;
+ rand = 1 + (random_u32 (&sm->random_seed) % m->locals[hi].prefix);
+ while (lo < hi)
+ {
+ mid = ((hi - lo) >> 1) + lo;
+ (rand > m->locals[mid].prefix) ? (lo = mid + 1) : (hi = mid);
+ }
+ if (!(m->locals[lo].prefix >= rand))
+ return 1;
+ if (PREDICT_FALSE (sm->num_workers > 1))
+ {
+ ip4_header_t ip = {
+ .src_address = m->locals[lo].addr,
+ };
+ if (sm->worker_in2out_cb (&ip, m->fib_index) !=
+ vlib_get_thread_index ())
+ goto get_local;
+ }
+ mapping->addr = m->locals[lo].addr;
+ mapping->port = clib_host_to_net_u16 (m->locals[lo].port);
+ mapping->fib_index = m->locals[lo].fib_index;
+ if (m->affinity)
+ {
+ if (nat_affinity_create_and_lock (ext_host_addr[0], match.addr,
+ match.protocol, match.port,
+ lo, m->affinity,
+ m->affinity_per_service_list_head_index))
+ nat_log_info ("create affinity record failed");
+ }
+ }
else
- {
- if (PREDICT_FALSE(lb != 0))
- *lb = NO_LB_NAT;
- mapping->fib_index = m->fib_index;
- mapping->addr = m->local_addr;
- /* Address only mapping doesn't change port */
- mapping->port = m->addr_only ? match.port
- : clib_host_to_net_u16 (m->local_port);
- }
+ {
+ if (PREDICT_FALSE (lb != 0))
+ *lb = NO_LB_NAT;
+ mapping->fib_index = m->fib_index;
+ mapping->addr = m->local_addr;
+ /* Address only mapping doesn't change port */
+ mapping->port = m->addr_only ? match.port
+ : clib_host_to_net_u16 (m->local_port);
+ }
mapping->protocol = m->proto;
}
else
mapping->addr = m->external_addr;
/* Address only mapping doesn't change port */
mapping->port = m->addr_only ? match.port
- : clib_host_to_net_u16 (m->external_port);
+ : clib_host_to_net_u16 (m->external_port);
mapping->fib_index = sm->outside_fib_index;
}
end:
- if (PREDICT_FALSE(is_addr_only != 0))
+ if (PREDICT_FALSE (is_addr_only != 0))
*is_addr_only = m->addr_only;
- if (PREDICT_FALSE(twice_nat != 0))
+ if (PREDICT_FALSE (twice_nat != 0))
*twice_nat = m->twice_nat;
return 0;
{
snat_main_t *sm = &snat_main;
return min + random_u32 (&sm->random_seed) /
- (random_u32_max() / (max - min + 1) + 1);
+ (random_u32_max () / (max - min + 1) + 1);
}
int
snat_alloc_outside_address_and_port (snat_address_t * addresses,
- u32 fib_index,
- u32 thread_index,
- snat_session_key_t * k,
- u32 * address_indexp,
- u16 port_per_thread,
- u32 snat_thread_index)
+ u32 fib_index,
+ u32 thread_index,
+ snat_session_key_t * k,
+ u16 port_per_thread,
+ u32 snat_thread_index)
{
snat_main_t *sm = &snat_main;
- return sm->alloc_addr_and_port(addresses, fib_index, thread_index, k,
- address_indexp, port_per_thread,
- snat_thread_index);
+ return sm->alloc_addr_and_port (addresses, fib_index, thread_index, k,
+ port_per_thread, snat_thread_index);
}
static int
nat_alloc_addr_and_port_default (snat_address_t * addresses,
- u32 fib_index,
- u32 thread_index,
- snat_session_key_t * k,
- u32 * address_indexp,
- u16 port_per_thread,
- u32 snat_thread_index)
+ u32 fib_index,
+ u32 thread_index,
+ snat_session_key_t * k,
+ u16 port_per_thread, u32 snat_thread_index)
{
- int i, gi = 0;
+ int i;
snat_address_t *a, *ga = 0;
u32 portnum;
{
a = addresses + i;
switch (k->protocol)
- {
+ {
#define _(N, j, n, s) \
case SNAT_PROTOCOL_##N: \
if (a->busy_##n##_ports_per_thread[thread_index] < port_per_thread) \
a->busy_##n##_ports++; \
k->addr = a->addr; \
k->port = clib_host_to_net_u16(portnum); \
- *address_indexp = i; \
return 0; \
} \
} \
else if (a->fib_index == ~0) \
{ \
ga = a; \
- gi = i; \
} \
} \
break;
- foreach_snat_protocol
+ foreach_snat_protocol
#undef _
- default:
- nat_log_info ("unknown protocol");
- return 1;
- }
+ default:
+ nat_log_info ("unknown protocol");
+ return 1;
+ }
}
a->busy_##n##_ports++; \
k->addr = a->addr; \
k->port = clib_host_to_net_u16(portnum); \
- *address_indexp = gi; \
return 0; \
}
break;
}
/* Totally out of translations to use... */
- snat_ipfix_logging_addresses_exhausted(0);
+ snat_ipfix_logging_addresses_exhausted (0);
return 1;
}
static int
nat_alloc_addr_and_port_mape (snat_address_t * addresses,
- u32 fib_index,
- u32 thread_index,
- snat_session_key_t * k,
- u32 * address_indexp,
- u16 port_per_thread,
- u32 snat_thread_index)
+ u32 fib_index,
+ u32 thread_index,
+ snat_session_key_t * k,
+ u16 port_per_thread, u32 snat_thread_index)
{
snat_main_t *sm = &snat_main;
snat_address_t *a = addresses;
a->busy_##n##_ports++; \
k->addr = a->addr; \
k->port = clib_host_to_net_u16 (portnum); \
- *address_indexp = i; \
return 0; \
} \
} \
exhausted:
/* Totally out of translations to use... */
- snat_ipfix_logging_addresses_exhausted(0);
+ snat_ipfix_logging_addresses_exhausted (0);
return 1;
}
static int
nat_alloc_addr_and_port_range (snat_address_t * addresses,
- u32 fib_index,
- u32 thread_index,
- snat_session_key_t * k,
- u32 * address_indexp,
- u16 port_per_thread,
- u32 snat_thread_index)
+ u32 fib_index,
+ u32 thread_index,
+ snat_session_key_t * k,
+ u16 port_per_thread, u32 snat_thread_index)
{
snat_main_t *sm = &snat_main;
snat_address_t *a = addresses;
a->busy_##n##_ports++; \
k->addr = a->addr; \
k->port = clib_host_to_net_u16 (portnum); \
- *address_indexp = i; \
return 0; \
} \
} \
exhausted:
/* Totally out of translations to use... */
- snat_ipfix_logging_addresses_exhausted(0);
+ snat_ipfix_logging_addresses_exhausted (0);
return 1;
}
{
nat_dpo_create (DPO_PROTO_IP4, 0, &dpo_v4);
fib_table_entry_special_dpo_add (0, &pfx, FIB_SOURCE_PLUGIN_HI,
- FIB_ENTRY_FLAG_EXCLUSIVE, &dpo_v4);
+ FIB_ENTRY_FLAG_EXCLUSIVE, &dpo_v4);
dpo_reset (&dpo_v4);
}
else
}
}
-uword
-unformat_snat_protocol (unformat_input_t * input, va_list * args)
-{
- u32 *r = va_arg (*args, u32 *);
-
- if (0);
-#define _(N, i, n, s) else if (unformat (input, s)) *r = SNAT_PROTOCOL_##N;
- foreach_snat_protocol
-#undef _
- else
- return 0;
- return 1;
-}
-
-u8 *
-format_snat_protocol (u8 * s, va_list * args)
-{
- u32 i = va_arg (*args, u32);
- u8 *t = 0;
-
- switch (i)
- {
-#define _(N, j, n, str) case SNAT_PROTOCOL_##N: t = (u8 *) str; break;
- foreach_snat_protocol
-#undef _
- default:
- s = format (s, "unknown");
- return s;
- }
- s = format (s, "%s", t);
- return s;
-}
-
-u8 *
-format_nat_addr_and_port_alloc_alg (u8 * s, va_list * args)
-{
- u32 i = va_arg (*args, u32);
- u8 *t = 0;
-
- switch (i)
- {
-#define _(v, N, s) case NAT_ADDR_AND_PORT_ALLOC_ALG_##N: t = (u8 *) s; break;
- foreach_nat_addr_and_port_alloc_alg
-#undef _
- default:
- s = format (s, "unknown");
- return s;
- }
- s = format (s, "%s", t);
- return s;
-}
-
-u8 * format_snat_key (u8 * s, va_list * args);
-u8 * format_static_mapping_key (u8 * s, va_list * args);
-
u8 *
format_session_kvp (u8 * s, va_list * args)
{
k.as_u64 = v->key;
s = format (s, "%U static-mapping-index %llu",
- format_static_mapping_key, &k, v->value);
+ format_static_mapping_key, &k, v->value);
return s;
}
k.as_u64 = v->key;
s = format (s, "%U fib %d user-index %llu", format_ip4_address, &k.addr,
- k.fib_index, v->value);
+ k.fib_index, v->value);
return s;
}
k.as_u64[0] = v->key[0];
k.as_u64[1] = v->key[1];
- s = format (s, "local %U:%d remote %U:%d proto %U fib %d session-index %llu",
- format_ip4_address, &k.l_addr, clib_net_to_host_u16 (k.l_port),
- format_ip4_address, &k.r_addr, clib_net_to_host_u16 (k.r_port),
- format_ip_protocol, k.proto, k.fib_index, v->value);
+ s =
+ format (s, "local %U:%d remote %U:%d proto %U fib %d session-index %llu",
+ format_ip4_address, &k.l_addr, clib_net_to_host_u16 (k.l_port),
+ format_ip4_address, &k.r_addr, clib_net_to_host_u16 (k.r_port),
+ format_ip_protocol, k.proto, k.fib_index, v->value);
return s;
}
next_worker_index = sm->first_worker_index;
hash = ip0->src_address.as_u32 + (ip0->src_address.as_u32 >> 8) +
- (ip0->src_address.as_u32 >> 16) + (ip0->src_address.as_u32 >>24);
+ (ip0->src_address.as_u32 >> 16) + (ip0->src_address.as_u32 >> 24);
if (PREDICT_TRUE (is_pow2 (_vec_len (sm->workers))))
next_worker_index += sm->workers[hash & (_vec_len (sm->workers) - 1)];
m_key.protocol = 0;
m_key.fib_index = rx_fib_index0;
kv.key = m_key.as_u64;
- if (!clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value))
- {
- m = pool_elt_at_index (sm->static_mappings, value.value);
- return m->workers[0];
- }
+ if (!clib_bihash_search_8_8
+ (&sm->static_mapping_by_external, &kv, &value))
+ {
+ m = pool_elt_at_index (sm->static_mappings, value.value);
+ return m->workers[0];
+ }
}
proto = ip_proto_to_snat_proto (ip0->protocol);
ip0->fragment_id, ip0->protocol);
if (reass && (reass->thread_index != (u32) ~ 0))
- return reass->thread_index;
+ return reass->thread_index;
else
return vlib_get_thread_index ();
}
if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_ICMP))
{
- icmp46_header_t * icmp = (icmp46_header_t *) udp;
- icmp_echo_header_t *echo = (icmp_echo_header_t *)(icmp + 1);
+ icmp46_header_t *icmp = (icmp46_header_t *) udp;
+ icmp_echo_header_t *echo = (icmp_echo_header_t *) (icmp + 1);
if (!icmp_is_error_message (icmp))
- port = echo->identifier;
+ port = echo->identifier;
else
- {
- ip4_header_t *inner_ip = (ip4_header_t *)(echo + 1);
- proto = ip_proto_to_snat_proto (inner_ip->protocol);
- void *l4_header = ip4_next_header (inner_ip);
- switch (proto)
- {
- case SNAT_PROTOCOL_ICMP:
- icmp = (icmp46_header_t*)l4_header;
- echo = (icmp_echo_header_t *)(icmp + 1);
- port = echo->identifier;
- break;
- case SNAT_PROTOCOL_UDP:
- case SNAT_PROTOCOL_TCP:
- port = ((tcp_udp_header_t*)l4_header)->src_port;
- break;
- default:
- return vlib_get_thread_index ();
- }
- }
+ {
+ ip4_header_t *inner_ip = (ip4_header_t *) (echo + 1);
+ proto = ip_proto_to_snat_proto (inner_ip->protocol);
+ void *l4_header = ip4_next_header (inner_ip);
+ switch (proto)
+ {
+ case SNAT_PROTOCOL_ICMP:
+ icmp = (icmp46_header_t *) l4_header;
+ echo = (icmp_echo_header_t *) (icmp + 1);
+ port = echo->identifier;
+ break;
+ case SNAT_PROTOCOL_UDP:
+ case SNAT_PROTOCOL_TCP:
+ port = ((tcp_udp_header_t *) l4_header)->src_port;
+ break;
+ default:
+ return vlib_get_thread_index ();
+ }
+ }
}
/* try static mappings with port */
m_key.protocol = proto;
m_key.fib_index = rx_fib_index0;
kv.key = m_key.as_u64;
- if (!clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value))
- {
- m = pool_elt_at_index (sm->static_mappings, value.value);
- return m->workers[0];
- }
+ if (!clib_bihash_search_8_8
+ (&sm->static_mapping_by_external, &kv, &value))
+ {
+ m = pool_elt_at_index (sm->static_mappings, value.value);
+ return m->workers[0];
+ }
}
/* worker by outside port */
if (PREDICT_FALSE (pool_elts (sm->static_mappings)))
{
make_sm_kv (&kv, &ip->dst_address, 0, rx_fib_index, 0);
- if (!clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value))
- {
- m = pool_elt_at_index (sm->static_mappings, value.value);
- return m->workers[0];
- }
+ if (!clib_bihash_search_8_8
+ (&sm->static_mapping_by_external, &kv, &value))
+ {
+ m = pool_elt_at_index (sm->static_mappings, value.value);
+ return m->workers[0];
+ }
}
proto = ip_proto_to_snat_proto (ip->protocol);
if (PREDICT_FALSE (ip->protocol == IP_PROTOCOL_ICMP))
{
- icmp46_header_t * icmp = (icmp46_header_t *) udp;
- icmp_echo_header_t *echo = (icmp_echo_header_t *)(icmp + 1);
+ icmp46_header_t *icmp = (icmp46_header_t *) udp;
+ icmp_echo_header_t *echo = (icmp_echo_header_t *) (icmp + 1);
if (!icmp_is_error_message (icmp))
- port = echo->identifier;
+ port = echo->identifier;
else
- {
- ip4_header_t *inner_ip = (ip4_header_t *)(echo + 1);
- proto = ip_proto_to_snat_proto (inner_ip->protocol);
- void *l4_header = ip4_next_header (inner_ip);
- switch (proto)
- {
- case SNAT_PROTOCOL_ICMP:
- icmp = (icmp46_header_t*)l4_header;
- echo = (icmp_echo_header_t *)(icmp + 1);
- port = echo->identifier;
- break;
- case SNAT_PROTOCOL_UDP:
- case SNAT_PROTOCOL_TCP:
- port = ((tcp_udp_header_t*)l4_header)->src_port;
- break;
- default:
- return vlib_get_thread_index ();
- }
- }
+ {
+ ip4_header_t *inner_ip = (ip4_header_t *) (echo + 1);
+ proto = ip_proto_to_snat_proto (inner_ip->protocol);
+ void *l4_header = ip4_next_header (inner_ip);
+ switch (proto)
+ {
+ case SNAT_PROTOCOL_ICMP:
+ icmp = (icmp46_header_t *) l4_header;
+ echo = (icmp_echo_header_t *) (icmp + 1);
+ port = echo->identifier;
+ break;
+ case SNAT_PROTOCOL_UDP:
+ case SNAT_PROTOCOL_TCP:
+ port = ((tcp_udp_header_t *) l4_header)->src_port;
+ break;
+ default:
+ return vlib_get_thread_index ();
+ }
+ }
}
/* try static mappings with port */
if (PREDICT_FALSE (pool_elts (sm->static_mappings)))
{
make_sm_kv (&kv, &ip->dst_address, proto, rx_fib_index,
- clib_net_to_host_u16 (port));
- if (!clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value))
- {
- m = pool_elt_at_index (sm->static_mappings, value.value);
- if (!vec_len(m->locals))
- return m->workers[0];
+ clib_net_to_host_u16 (port));
+ if (!clib_bihash_search_8_8
+ (&sm->static_mapping_by_external, &kv, &value))
+ {
+ m = pool_elt_at_index (sm->static_mappings, value.value);
+ if (!vec_len (m->locals))
+ return m->workers[0];
- hash = ip->src_address.as_u32 + (ip->src_address.as_u32 >> 8) +
- (ip->src_address.as_u32 >> 16) + (ip->src_address.as_u32 >>24);
+ hash = ip->src_address.as_u32 + (ip->src_address.as_u32 >> 8) +
+ (ip->src_address.as_u32 >> 16) + (ip->src_address.as_u32 >> 24);
- if (PREDICT_TRUE (is_pow2 (_vec_len (m->workers))))
- return m->workers[hash & (_vec_len (m->workers) - 1)];
- else
- return m->workers[hash % _vec_len (m->workers)];
- }
+ if (PREDICT_TRUE (is_pow2 (_vec_len (m->workers))))
+ return m->workers[hash & (_vec_len (m->workers) - 1)];
+ else
+ return m->workers[hash % _vec_len (m->workers)];
+ }
}
/* worker by outside port */
static clib_error_t *
snat_config (vlib_main_t * vm, unformat_input_t * input)
{
- snat_main_t * sm = &snat_main;
- nat66_main_t * nm = &nat66_main;
+ snat_main_t *sm = &snat_main;
+ nat66_main_t *nm = &nat66_main;
u32 translation_buckets = 1024;
- u32 translation_memory_size = 128<<20;
+ u32 translation_memory_size = 128 << 20;
u32 user_buckets = 128;
- u32 user_memory_size = 64<<20;
+ u32 user_memory_size = 64 << 20;
u32 max_translations_per_user = 100;
u32 outside_vrf_id = 0;
u32 outside_ip6_vrf_id = 0;
u32 inside_vrf_id = 0;
u32 static_mapping_buckets = 1024;
- u32 static_mapping_memory_size = 64<<20;
+ u32 static_mapping_memory_size = 64 << 20;
u32 nat64_bib_buckets = 1024;
u32 nat64_bib_memory_size = 128 << 20;
u32 nat64_st_buckets = 2048;
u8 static_mapping_only = 0;
u8 static_mapping_connection_tracking = 0;
snat_main_per_thread_data_t *tsm;
- dslite_main_t * dm = &dslite_main;
+ dslite_main_t *dm = &dslite_main;
sm->deterministic = 0;
sm->out2in_dpo = 0;
while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
{
- if (unformat (input, "translation hash buckets %d", &translation_buckets))
- ;
+ if (unformat
+ (input, "translation hash buckets %d", &translation_buckets))
+ ;
else if (unformat (input, "translation hash memory %d",
- &translation_memory_size));
+ &translation_memory_size));
else if (unformat (input, "user hash buckets %d", &user_buckets))
- ;
- else if (unformat (input, "user hash memory %d",
- &user_memory_size))
- ;
+ ;
+ else if (unformat (input, "user hash memory %d", &user_memory_size))
+ ;
else if (unformat (input, "max translations per user %d",
- &max_translations_per_user))
- ;
- else if (unformat (input, "outside VRF id %d",
- &outside_vrf_id))
- ;
- else if (unformat (input, "outside ip6 VRF id %d",
- &outside_ip6_vrf_id))
- ;
- else if (unformat (input, "inside VRF id %d",
- &inside_vrf_id))
- ;
+ &max_translations_per_user))
+ ;
+ else if (unformat (input, "outside VRF id %d", &outside_vrf_id))
+ ;
+ else if (unformat (input, "outside ip6 VRF id %d", &outside_ip6_vrf_id))
+ ;
+ else if (unformat (input, "inside VRF id %d", &inside_vrf_id))
+ ;
else if (unformat (input, "static mapping only"))
- {
- static_mapping_only = 1;
- if (unformat (input, "connection tracking"))
- static_mapping_connection_tracking = 1;
- }
+ {
+ static_mapping_only = 1;
+ if (unformat (input, "connection tracking"))
+ static_mapping_connection_tracking = 1;
+ }
else if (unformat (input, "deterministic"))
- sm->deterministic = 1;
+ sm->deterministic = 1;
else if (unformat (input, "nat64 bib hash buckets %d",
- &nat64_bib_buckets))
- ;
+ &nat64_bib_buckets))
+ ;
else if (unformat (input, "nat64 bib hash memory %d",
- &nat64_bib_memory_size))
- ;
- else if (unformat (input, "nat64 st hash buckets %d", &nat64_st_buckets))
- ;
+ &nat64_bib_memory_size))
+ ;
+ else
+ if (unformat (input, "nat64 st hash buckets %d", &nat64_st_buckets))
+ ;
else if (unformat (input, "nat64 st hash memory %d",
- &nat64_st_memory_size))
- ;
+ &nat64_st_memory_size))
+ ;
else if (unformat (input, "out2in dpo"))
- sm->out2in_dpo = 1;
+ sm->out2in_dpo = 1;
else if (unformat (input, "dslite ce"))
- dslite_set_ce(dm, 1);
+ dslite_set_ce (dm, 1);
else if (unformat (input, "endpoint-dependent"))
- sm->endpoint_dependent = 1;
+ sm->endpoint_dependent = 1;
else
return clib_error_return (0, "unknown input '%U'",
format_unformat_error, input);
}
if (sm->deterministic && sm->endpoint_dependent)
- return clib_error_return (
- 0, "deterministic and endpoint-dependent modes are mutually exclusive");
+ return clib_error_return (0,
+ "deterministic and endpoint-dependent modes are mutually exclusive");
if (static_mapping_only && (sm->deterministic || sm->endpoint_dependent))
- return clib_error_return (
- 0, "static mapping only mode available only for simple nat");
+ return clib_error_return (0,
+ "static mapping only mode available only for simple nat");
if (sm->out2in_dpo && (sm->deterministic || sm->endpoint_dependent))
- return clib_error_return (
- 0, "out2in dpo mode available only for simple nat");
+ return clib_error_return (0,
+ "out2in dpo mode available only for simple nat");
/* for show commands, etc. */
sm->translation_buckets = translation_buckets;
sm->max_translations_per_user = max_translations_per_user;
sm->outside_vrf_id = outside_vrf_id;
sm->outside_fib_index = fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP4,
- outside_vrf_id,
- FIB_SOURCE_PLUGIN_HI);
+ outside_vrf_id,
+ FIB_SOURCE_PLUGIN_HI);
nm->outside_vrf_id = outside_ip6_vrf_id;
nm->outside_fib_index = fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6,
- outside_ip6_vrf_id,
- FIB_SOURCE_PLUGIN_HI);
+ outside_ip6_vrf_id,
+ FIB_SOURCE_PLUGIN_HI);
sm->inside_vrf_id = inside_vrf_id;
sm->inside_fib_index = fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP4,
- inside_vrf_id,
- FIB_SOURCE_PLUGIN_HI);
+ inside_vrf_id,
+ FIB_SOURCE_PLUGIN_HI);
sm->static_mapping_only = static_mapping_only;
sm->static_mapping_connection_tracking = static_mapping_connection_tracking;
- nat64_set_hash(nat64_bib_buckets, nat64_bib_memory_size, nat64_st_buckets,
- nat64_st_memory_size);
+ nat64_set_hash (nat64_bib_buckets, nat64_bib_memory_size, nat64_st_buckets,
+ nat64_st_memory_size);
if (sm->deterministic)
{
else
{
if (sm->endpoint_dependent)
- {
- sm->worker_in2out_cb = snat_get_worker_in2out_cb;
- sm->worker_out2in_cb = nat44_ed_get_worker_out2in_cb;
- sm->in2out_node_index = nat44_ed_in2out_node.index;
- sm->in2out_output_node_index = nat44_ed_in2out_output_node.index;
- sm->out2in_node_index = nat44_ed_out2in_node.index;
- sm->icmp_match_in2out_cb = icmp_match_in2out_ed;
- sm->icmp_match_out2in_cb = icmp_match_out2in_ed;
- nat_affinity_init (vm);
- }
+ {
+ sm->worker_in2out_cb = snat_get_worker_in2out_cb;
+ sm->worker_out2in_cb = nat44_ed_get_worker_out2in_cb;
+ sm->in2out_node_index = nat44_ed_in2out_node.index;
+ sm->in2out_output_node_index = nat44_ed_in2out_output_node.index;
+ sm->out2in_node_index = nat44_ed_out2in_node.index;
+ sm->icmp_match_in2out_cb = icmp_match_in2out_ed;
+ sm->icmp_match_out2in_cb = icmp_match_out2in_ed;
+ nat_affinity_init (vm);
+ }
else
- {
- sm->worker_in2out_cb = snat_get_worker_in2out_cb;
- sm->worker_out2in_cb = snat_get_worker_out2in_cb;
- sm->in2out_node_index = snat_in2out_node.index;
- sm->in2out_output_node_index = snat_in2out_output_node.index;
- sm->out2in_node_index = snat_out2in_node.index;
- sm->icmp_match_in2out_cb = icmp_match_in2out_slow;
- sm->icmp_match_out2in_cb = icmp_match_out2in_slow;
- }
+ {
+ sm->worker_in2out_cb = snat_get_worker_in2out_cb;
+ sm->worker_out2in_cb = snat_get_worker_out2in_cb;
+ sm->in2out_node_index = snat_in2out_node.index;
+ sm->in2out_output_node_index = snat_in2out_output_node.index;
+ sm->out2in_node_index = snat_out2in_node.index;
+ sm->icmp_match_in2out_cb = icmp_match_in2out_slow;
+ sm->icmp_match_out2in_cb = icmp_match_out2in_slow;
+ }
if (!static_mapping_only ||
- (static_mapping_only && static_mapping_connection_tracking))
- {
+ (static_mapping_only && static_mapping_connection_tracking))
+ {
+ /* *INDENT-OFF* */
vec_foreach (tsm, sm->per_thread_data)
{
if (sm->endpoint_dependent)
clib_bihash_set_kvp_format_fn_8_8 (&tsm->user_hash,
format_user_kvp);
}
+ /* *INDENT-ON* */
- }
+ }
else
- {
- sm->icmp_match_in2out_cb = icmp_match_in2out_fast;
- sm->icmp_match_out2in_cb = icmp_match_out2in_fast;
- }
+ {
+ sm->icmp_match_in2out_cb = icmp_match_in2out_fast;
+ sm->icmp_match_out2in_cb = icmp_match_out2in_fast;
+ }
clib_bihash_init_8_8 (&sm->static_mapping_by_local,
- "static_mapping_by_local", static_mapping_buckets,
- static_mapping_memory_size);
+ "static_mapping_by_local", static_mapping_buckets,
+ static_mapping_memory_size);
clib_bihash_set_kvp_format_fn_8_8 (&sm->static_mapping_by_local,
- format_static_mapping_kvp);
+ format_static_mapping_kvp);
clib_bihash_init_8_8 (&sm->static_mapping_by_external,
- "static_mapping_by_external", static_mapping_buckets,
- static_mapping_memory_size);
+ "static_mapping_by_external",
+ static_mapping_buckets,
+ static_mapping_memory_size);
clib_bihash_set_kvp_format_fn_8_8 (&sm->static_mapping_by_external,
- format_static_mapping_kvp);
+ format_static_mapping_kvp);
}
return 0;
VLIB_CONFIG_FUNCTION (snat_config, "nat");
-u8 * format_snat_session_state (u8 * s, va_list * args)
-{
- u32 i = va_arg (*args, u32);
- u8 *t = 0;
-
- switch (i)
- {
-#define _(v, N, str) case SNAT_SESSION_##N: t = (u8 *) str; break;
- foreach_snat_session_state
-#undef _
- default:
- t = format (t, "unknown");
- }
- s = format (s, "%s", t);
- return s;
-}
-
-u8 * format_snat_key (u8 * s, va_list * args)
-{
- snat_session_key_t * key = va_arg (*args, snat_session_key_t *);
-
- s = format (s, "%U proto %U port %d fib %d",
- format_ip4_address, &key->addr,
- format_snat_protocol, key->protocol,
- clib_net_to_host_u16 (key->port), key->fib_index);
- return s;
-}
-
-u8 * format_static_mapping_key (u8 * s, va_list * args)
-{
- snat_session_key_t * key = va_arg (*args, snat_session_key_t *);
-
- s = format (s, "%U proto %U port %d fib %d",
- format_ip4_address, &key->addr,
- format_snat_protocol, key->protocol,
- key->port, key->fib_index);
- return s;
-}
-
-u8 * format_snat_session (u8 * s, va_list * args)
-{
- snat_main_per_thread_data_t * sm = va_arg (*args, snat_main_per_thread_data_t *);
- snat_session_t * sess = va_arg (*args, snat_session_t *);
-
- if (snat_is_unk_proto_session (sess))
- {
- s = format (s, " i2o %U proto %u fib %u\n",
- format_ip4_address, &sess->in2out.addr,
- clib_net_to_host_u16 (sess->in2out.port),
- sess->in2out.fib_index);
- s = format (s, " o2i %U proto %u fib %u\n",
- format_ip4_address, &sess->out2in.addr,
- clib_net_to_host_u16 (sess->out2in.port),
- sess->out2in.fib_index);
- }
- else
- {
- s = format (s, " i2o %U\n", format_snat_key, &sess->in2out);
- s = format (s, " o2i %U\n", format_snat_key, &sess->out2in);
- }
- if (is_ed_session (sess) || is_fwd_bypass_session (sess))
- {
- if (is_twice_nat_session (sess))
- {
- s = format (s, " external host o2i %U:%d i2o %U:%d\n",
- format_ip4_address, &sess->ext_host_addr,
- clib_net_to_host_u16 (sess->ext_host_port),
- format_ip4_address, &sess->ext_host_nat_addr,
- clib_net_to_host_u16 (sess->ext_host_nat_port));
- }
- else
- {
- if (sess->ext_host_addr.as_u32)
- s = format (s, " external host %U:%u\n",
- format_ip4_address, &sess->ext_host_addr,
- clib_net_to_host_u16 (sess->ext_host_port));
- }
- }
- s = format (s, " index %llu\n", sess - sm->sessions);
- s = format (s, " last heard %.2f\n", sess->last_heard);
- s = format (s, " total pkts %d, total bytes %lld\n",
- sess->total_pkts, sess->total_bytes);
- if (snat_is_session_static (sess))
- s = format (s, " static translation\n");
- else
- s = format (s, " dynamic translation\n");
- if (is_fwd_bypass_session (sess))
- s = format (s, " forwarding-bypass\n");
- if (is_lb_session (sess))
- s = format (s, " load-balancing\n");
- if (is_twice_nat_session (sess))
- s = format (s, " twice-nat\n");
-
- return s;
-}
-
-u8 * format_snat_user (u8 * s, va_list * args)
-{
- snat_main_per_thread_data_t * sm = va_arg (*args, snat_main_per_thread_data_t *);
- snat_user_t * u = va_arg (*args, snat_user_t *);
- int verbose = va_arg (*args, int);
- dlist_elt_t * head, * elt;
- u32 elt_index, head_index;
- u32 session_index;
- snat_session_t * sess;
-
- s = format (s, "%U: %d dynamic translations, %d static translations\n",
- format_ip4_address, &u->addr, u->nsessions, u->nstaticsessions);
-
- if (verbose == 0)
- return s;
-
- if (u->nsessions || u->nstaticsessions)
- {
- head_index = u->sessions_per_user_list_head_index;
- head = pool_elt_at_index (sm->list_pool, head_index);
-
- elt_index = head->next;
- elt = pool_elt_at_index (sm->list_pool, elt_index);
- session_index = elt->value;
-
- while (session_index != ~0)
- {
- sess = pool_elt_at_index (sm->sessions, session_index);
-
- s = format (s, " %U\n", format_snat_session, sm, sess);
-
- elt_index = elt->next;
- elt = pool_elt_at_index (sm->list_pool, elt_index);
- session_index = elt->value;
- }
- }
-
- return s;
-}
-
-u8 * format_snat_static_mapping (u8 * s, va_list * args)
-{
- snat_static_mapping_t *m = va_arg (*args, snat_static_mapping_t *);
- nat44_lb_addr_port_t *local;
-
- if (m->addr_only)
- s = format (s, "local %U external %U vrf %d %s %s",
- format_ip4_address, &m->local_addr,
- format_ip4_address, &m->external_addr,
- m->vrf_id,
- m->twice_nat == TWICE_NAT ? "twice-nat" :
- m->twice_nat == TWICE_NAT_SELF ? "self-twice-nat" : "",
- m->out2in_only ? "out2in-only" : "");
- else
- {
- if (vec_len (m->locals))
- {
- s = format (s, "%U external %U:%d %s %s",
- format_snat_protocol, m->proto,
- format_ip4_address, &m->external_addr, m->external_port,
- m->twice_nat == TWICE_NAT ? "twice-nat" :
- m->twice_nat == TWICE_NAT_SELF ? "self-twice-nat" : "",
- m->out2in_only ? "out2in-only" : "");
- vec_foreach (local, m->locals)
- s = format (s, "\n local %U:%d vrf %d probability %d\%",
- format_ip4_address, &local->addr, local->port,
- local->vrf_id, local->probability);
- }
- else
- s = format (s, "%U local %U:%d external %U:%d vrf %d %s %s",
- format_snat_protocol, m->proto,
- format_ip4_address, &m->local_addr, m->local_port,
- format_ip4_address, &m->external_addr, m->external_port,
- m->vrf_id,
- m->twice_nat == TWICE_NAT ? "twice-nat" :
- m->twice_nat == TWICE_NAT_SELF ? "self-twice-nat" : "",
- m->out2in_only ? "out2in-only" : "");
- }
- return s;
-}
-
-u8 * format_snat_static_map_to_resolve (u8 * s, va_list * args)
-{
- snat_static_map_resolve_t *m = va_arg (*args, snat_static_map_resolve_t *);
- vnet_main_t *vnm = vnet_get_main();
-
- if (m->addr_only)
- s = format (s, "local %U external %U vrf %d",
- format_ip4_address, &m->l_addr,
- format_vnet_sw_if_index_name, vnm, m->sw_if_index,
- m->vrf_id);
- else
- s = format (s, "%U local %U:%d external %U:%d vrf %d",
- format_snat_protocol, m->proto,
- format_ip4_address, &m->l_addr, m->l_port,
- format_vnet_sw_if_index_name, vnm, m->sw_if_index,
- m->e_port, m->vrf_id);
-
- return s;
-}
-
-u8 * format_det_map_ses (u8 * s, va_list * args)
-{
- snat_det_map_t * det_map = va_arg (*args, snat_det_map_t *);
- ip4_address_t in_addr, out_addr;
- u32 in_offset, out_offset;
- snat_det_session_t * ses = va_arg (*args, snat_det_session_t *);
- u32 * i = va_arg (*args, u32 *);
-
- u32 user_index = *i / SNAT_DET_SES_PER_USER;
- in_addr.as_u32 = clib_host_to_net_u32 (
- clib_net_to_host_u32(det_map->in_addr.as_u32) + user_index);
- in_offset = clib_net_to_host_u32(in_addr.as_u32) -
- clib_net_to_host_u32(det_map->in_addr.as_u32);
- out_offset = in_offset / det_map->sharing_ratio;
- out_addr.as_u32 = clib_host_to_net_u32(
- clib_net_to_host_u32(det_map->out_addr.as_u32) + out_offset);
- s = format (s, "in %U:%d out %U:%d external host %U:%d state: %U expire: %d\n",
- format_ip4_address, &in_addr,
- clib_net_to_host_u16 (ses->in_port),
- format_ip4_address, &out_addr,
- clib_net_to_host_u16 (ses->out.out_port),
- format_ip4_address, &ses->out.ext_host_addr,
- clib_net_to_host_u16 (ses->out.ext_host_port),
- format_snat_session_state, ses->state,
- ses->expire);
-
- return s;
-}
-
static void
nat_ip4_add_del_addr_only_sm_cb (ip4_main_t * im,
- uword opaque,
- u32 sw_if_index,
- ip4_address_t * address,
- u32 address_length,
- u32 if_address_index,
- u32 is_delete)
+ uword opaque,
+ u32 sw_if_index,
+ ip4_address_t * address,
+ u32 address_length,
+ u32 if_address_index, u32 is_delete)
{
snat_main_t *sm = &snat_main;
snat_static_map_resolve_t *rp;
{
rp = sm->to_resolve + i;
if (rp->addr_only == 0)
- continue;
+ continue;
if (rp->sw_if_index == sw_if_index)
- goto match;
+ goto match;
}
return;
{
/* Don't trip over lease renewal, static config */
if (m)
- return;
+ return;
}
else
{
if (!m)
- return;
+ return;
}
/* Indetity mapping? */
l_addr.as_u32 = rp->l_addr.as_u32;
/* Add the static mapping */
rv = snat_add_static_mapping (l_addr,
- address[0],
- rp->l_port,
- rp->e_port,
- rp->vrf_id,
- rp->addr_only,
- ~0 /* sw_if_index */,
- rp->proto,
- !is_delete,
- 0, 0, rp->tag);
+ address[0],
+ rp->l_port,
+ rp->e_port,
+ rp->vrf_id,
+ rp->addr_only, ~0 /* sw_if_index */ ,
+ rp->proto, !is_delete, 0, 0, rp->tag);
if (rv)
nat_log_notice ("snat_add_static_mapping returned %d", rv);
}
static void
snat_ip4_add_del_interface_address_cb (ip4_main_t * im,
- uword opaque,
- u32 sw_if_index,
- ip4_address_t * address,
- u32 address_length,
- u32 if_address_index,
- u32 is_delete)
+ uword opaque,
+ u32 sw_if_index,
+ ip4_address_t * address,
+ u32 address_length,
+ u32 if_address_index, u32 is_delete)
{
snat_main_t *sm = &snat_main;
snat_static_map_resolve_t *rp;
u8 twice_nat = 0;
snat_address_t *addresses = sm->addresses;
- for (i = 0; i < vec_len(sm->auto_add_sw_if_indices); i++)
+ for (i = 0; i < vec_len (sm->auto_add_sw_if_indices); i++)
{
if (sw_if_index == sm->auto_add_sw_if_indices[i])
- goto match;
+ goto match;
}
- for (i = 0; i < vec_len(sm->auto_add_sw_if_indices_twice_nat); i++)
+ for (i = 0; i < vec_len (sm->auto_add_sw_if_indices_twice_nat); i++)
{
twice_nat = 1;
addresses = sm->twice_nat_addresses;
if (sw_if_index == sm->auto_add_sw_if_indices_twice_nat[i])
- goto match;
+ goto match;
}
return;
if (!is_delete)
{
/* Don't trip over lease renewal, static config */
- for (j = 0; j < vec_len(addresses); j++)
- if (addresses[j].addr.as_u32 == address->as_u32)
- return;
+ for (j = 0; j < vec_len (addresses); j++)
+ if (addresses[j].addr.as_u32 == address->as_u32)
+ return;
(void) snat_add_address (sm, address, ~0, twice_nat);
/* Scan static map resolution vector */
for (j = 0; j < vec_len (sm->to_resolve); j++)
- {
- rp = sm->to_resolve + j;
- if (rp->addr_only)
- continue;
- /* On this interface? */
- if (rp->sw_if_index == sw_if_index)
- {
- /* Indetity mapping? */
- if (rp->l_addr.as_u32 == 0)
- l_addr.as_u32 = address[0].as_u32;
- else
- l_addr.as_u32 = rp->l_addr.as_u32;
- /* Add the static mapping */
- rv = snat_add_static_mapping (l_addr,
- address[0],
- rp->l_port,
- rp->e_port,
- rp->vrf_id,
- rp->addr_only,
- ~0 /* sw_if_index */,
- rp->proto,
- rp->is_add,
- 0, 0, rp->tag);
- if (rv)
- nat_log_notice ("snat_add_static_mapping returned %d", rv);
- }
- }
+ {
+ rp = sm->to_resolve + j;
+ if (rp->addr_only)
+ continue;
+ /* On this interface? */
+ if (rp->sw_if_index == sw_if_index)
+ {
+ /* Indetity mapping? */
+ if (rp->l_addr.as_u32 == 0)
+ l_addr.as_u32 = address[0].as_u32;
+ else
+ l_addr.as_u32 = rp->l_addr.as_u32;
+ /* Add the static mapping */
+ rv = snat_add_static_mapping (l_addr,
+ address[0],
+ rp->l_port,
+ rp->e_port,
+ rp->vrf_id,
+ rp->addr_only,
+ ~0 /* sw_if_index */ ,
+ rp->proto,
+ rp->is_add, 0, 0, rp->tag);
+ if (rv)
+ nat_log_notice ("snat_add_static_mapping returned %d", rv);
+ }
+ }
return;
}
else
{
- (void) snat_del_address(sm, address[0], 1, twice_nat);
+ (void) snat_del_address (sm, address[0], 1, twice_nat);
return;
}
}
-int snat_add_interface_address (snat_main_t *sm, u32 sw_if_index, int is_del,
- u8 twice_nat)
+int
+snat_add_interface_address (snat_main_t * sm, u32 sw_if_index, int is_del,
+ u8 twice_nat)
{
- ip4_main_t * ip4_main = sm->ip4_main;
- ip4_address_t * first_int_addr;
+ ip4_main_t *ip4_main = sm->ip4_main;
+ ip4_address_t *first_int_addr;
snat_static_map_resolve_t *rp;
u32 *indices_to_delete = 0;
int i, j;
u32 *auto_add_sw_if_indices =
- twice_nat ? sm->auto_add_sw_if_indices_twice_nat : sm->auto_add_sw_if_indices;
+ twice_nat ? sm->
+ auto_add_sw_if_indices_twice_nat : sm->auto_add_sw_if_indices;
- first_int_addr = ip4_interface_first_address (ip4_main, sw_if_index,
- 0 /* just want the address*/);
+ first_int_addr = ip4_interface_first_address (ip4_main, sw_if_index, 0 /* just want the address */
+ );
- for (i = 0; i < vec_len(auto_add_sw_if_indices); i++)
+ for (i = 0; i < vec_len (auto_add_sw_if_indices); i++)
{
if (auto_add_sw_if_indices[i] == sw_if_index)
- {
- if (is_del)
- {
- /* if have address remove it */
- if (first_int_addr)
- (void) snat_del_address (sm, first_int_addr[0], 1, twice_nat);
- else
- {
- for (j = 0; j < vec_len (sm->to_resolve); j++)
- {
- rp = sm->to_resolve + j;
- if (rp->sw_if_index == sw_if_index)
- vec_add1 (indices_to_delete, j);
- }
- if (vec_len(indices_to_delete))
- {
- for (j = vec_len(indices_to_delete)-1; j >= 0; j--)
- vec_del1(sm->to_resolve, j);
- vec_free(indices_to_delete);
- }
- }
- if (twice_nat)
- vec_del1(sm->auto_add_sw_if_indices_twice_nat, i);
- else
- vec_del1(sm->auto_add_sw_if_indices, i);
- }
- else
- return VNET_API_ERROR_VALUE_EXIST;
+ {
+ if (is_del)
+ {
+ /* if have address remove it */
+ if (first_int_addr)
+ (void) snat_del_address (sm, first_int_addr[0], 1, twice_nat);
+ else
+ {
+ for (j = 0; j < vec_len (sm->to_resolve); j++)
+ {
+ rp = sm->to_resolve + j;
+ if (rp->sw_if_index == sw_if_index)
+ vec_add1 (indices_to_delete, j);
+ }
+ if (vec_len (indices_to_delete))
+ {
+ for (j = vec_len (indices_to_delete) - 1; j >= 0; j--)
+ vec_del1 (sm->to_resolve, j);
+ vec_free (indices_to_delete);
+ }
+ }
+ if (twice_nat)
+ vec_del1 (sm->auto_add_sw_if_indices_twice_nat, i);
+ else
+ vec_del1 (sm->auto_add_sw_if_indices, i);
+ }
+ else
+ return VNET_API_ERROR_VALUE_EXIST;
- return 0;
- }
+ return 0;
+ }
}
if (is_del)
/* add to the auto-address list */
if (twice_nat)
- vec_add1(sm->auto_add_sw_if_indices_twice_nat, sw_if_index);
+ vec_add1 (sm->auto_add_sw_if_indices_twice_nat, sw_if_index);
else
- vec_add1(sm->auto_add_sw_if_indices, sw_if_index);
+ vec_add1 (sm->auto_add_sw_if_indices, sw_if_index);
/* If the address is already bound - or static - add it now */
if (first_int_addr)
- (void) snat_add_address (sm, first_int_addr, ~0, twice_nat);
+ (void) snat_add_address (sm, first_int_addr, ~0, twice_nat);
return 0;
}
int
-nat44_del_session (snat_main_t *sm, ip4_address_t *addr, u16 port,
- snat_protocol_t proto, u32 vrf_id, int is_in)
+nat44_del_session (snat_main_t * sm, ip4_address_t * addr, u16 port,
+ snat_protocol_t proto, u32 vrf_id, int is_in)
{
snat_main_per_thread_data_t *tsm;
clib_bihash_kv_8_8_t kv, value;
if (!clib_bihash_search_8_8 (t, &kv, &value))
{
if (pool_is_free_index (tsm->sessions, value.value))
- return VNET_API_ERROR_UNSPECIFIED;
+ return VNET_API_ERROR_UNSPECIFIED;
s = pool_elt_at_index (tsm->sessions, value.value);
nat_free_session_data (sm, s, tsm - sm->per_thread_data);
}
int
-nat44_del_ed_session (snat_main_t *sm, ip4_address_t *addr, u16 port,
- ip4_address_t *eh_addr, u16 eh_port, u8 proto,
- u32 vrf_id, int is_in)
+nat44_del_ed_session (snat_main_t * sm, ip4_address_t * addr, u16 port,
+ ip4_address_t * eh_addr, u16 eh_port, u8 proto,
+ u32 vrf_id, int is_in)
{
ip4_header_t ip;
clib_bihash_16_8_t *t;
key.l_port = clib_host_to_net_u16 (port);
key.r_port = clib_host_to_net_u16 (eh_port);
key.proto = proto;
- key.fib_index = clib_host_to_net_u32 (fib_index);
+ key.fib_index = fib_index;
kv.key[0] = key.as_u64[0];
kv.key[1] = key.as_u64[1];
if (clib_bihash_search_16_8 (t, &kv, &value))
sm->alloc_addr_and_port = nat_alloc_addr_and_port_default;
}
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
-
/*
- * nat.h - NAT plugin definitions
- *
* Copyright (c) 2016 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
+/**
+ * @file NAT plugin global declarations
+ */
#ifndef __included_nat_h__
#define __included_nat_h__
#include <vlibapi/api.h>
#include <vlib/log.h>
-
+/* default session timeouts */
#define SNAT_UDP_TIMEOUT 300
#define SNAT_TCP_TRANSITORY_TIMEOUT 240
#define SNAT_TCP_ESTABLISHED_TIMEOUT 7440
#define SNAT_ICMP_TIMEOUT 60
+/* number of worker handoff frame queue elements */
#define NAT_FQ_NELTS 64
+/* NAT buffer flags */
#define SNAT_FLAG_HAIRPINNING (1 << 0)
-/* Key */
-typedef struct {
+/* session key (4-tuple) */
+typedef struct
+{
union
{
struct
{
ip4_address_t addr;
u16 port;
- u16 protocol:3,
- fib_index:13;
+ u16 protocol:3, fib_index:13;
};
u64 as_u64;
};
} snat_session_key_t;
-typedef struct {
+/* endpoint-dependent session key (6-tuple) */
+typedef struct
+{
union
{
struct
{
ip4_address_t l_addr;
ip4_address_t r_addr;
- u32 proto:8,
- fib_index:24;
+ u32 proto:8, fib_index:24;
u16 l_port;
u16 r_port;
};
};
} nat_ed_ses_key_t;
-typedef struct {
+/* deterministic session outside key */
+typedef struct
+{
union
{
struct
};
} snat_det_out_key_t;
-typedef struct {
+/* user (internal host) key */
+typedef struct
+{
union
{
struct
};
} snat_user_key_t;
+typedef struct
+{
+ u32 sw_if_index;
+ u32 next_index;
+ u8 cached;
+} nat44_reass_trace_t;
+
+/* External address and port allocation modes */
#define foreach_nat_addr_and_port_alloc_alg \
_(0, DEFAULT, "default") \
_(1, MAPE, "map-e") \
_(2, RANGE, "port-range")
-typedef enum {
+typedef enum
+{
#define _(v, N, s) NAT_ADDR_AND_PORT_ALLOC_ALG_##N = v,
foreach_nat_addr_and_port_alloc_alg
#undef _
} nat_addr_and_port_alloc_alg_t;
+
+/* Supported L4 protocols */
#define foreach_snat_protocol \
_(UDP, 0, udp, "udp") \
_(TCP, 1, tcp, "tcp") \
_(ICMP, 2, icmp, "icmp")
-typedef enum {
+typedef enum
+{
#define _(N, i, n, s) SNAT_PROTOCOL_##N = i,
foreach_snat_protocol
#undef _
} snat_protocol_t;
+/* Session state */
#define foreach_snat_session_state \
_(0, UNKNOWN, "unknown") \
_(1, UDP_ACTIVE, "udp-active") \
_(8, TCP_CLOSED, "tcp-closed") \
_(9, ICMP_ACTIVE, "icmp-active")
-typedef enum {
+typedef enum
+{
#define _(v, N, s) SNAT_SESSION_##N = v,
foreach_snat_session_state
#undef _
} snat_session_state_t;
+/* Endpoint dependent TCP session state */
#define NAT44_SES_I2O_FIN 1
#define NAT44_SES_O2I_FIN 2
#define NAT44_SES_I2O_FIN_ACK 4
#define NAT44_SES_I2O_SYN 16
#define NAT44_SES_O2I_SYN 32
-#define nat44_is_ses_closed(s) s->state == 0xf
-
+/* Session flags */
#define SNAT_SESSION_FLAG_STATIC_MAPPING 1
#define SNAT_SESSION_FLAG_UNKNOWN_PROTO 2
#define SNAT_SESSION_FLAG_LOAD_BALANCING 4
#define SNAT_SESSION_FLAG_FWD_BYPASS 32
#define SNAT_SESSION_FLAG_AFFINITY 64
+/* NAT interface flags */
#define NAT_INTERFACE_FLAG_IS_INSIDE 1
#define NAT_INTERFACE_FLAG_IS_OUTSIDE 2
-typedef CLIB_PACKED(struct {
- snat_session_key_t out2in; /* 0-15 */
+/* *INDENT-OFF* */
+typedef CLIB_PACKED(struct
+{
+ /* Outside network key */
+ snat_session_key_t out2in;
- snat_session_key_t in2out; /* 16-31 */
+ /* Inside network key */
+ snat_session_key_t in2out;
- u32 flags; /* 32-35 */
+ /* Flags */
+ u32 flags;
- /* per-user translations */
- u32 per_user_index; /* 36-39 */
-
- u32 per_user_list_head_index; /* 40-43 */
+ /* Per-user translations */
+ u32 per_user_index;
+ u32 per_user_list_head_index;
/* Last heard timer */
- f64 last_heard; /* 44-51 */
-
- u64 total_bytes; /* 52-59 */
-
- u32 total_pkts; /* 60-63 */
+ f64 last_heard;
- /* Outside address */
- u32 outside_address_index; /* 64-67 */
+ /* Counters */
+ u64 total_bytes;
+ u32 total_pkts;
/* External host address and port */
- ip4_address_t ext_host_addr; /* 68-71 */
- u16 ext_host_port; /* 72-73 */
+ ip4_address_t ext_host_addr;
+ u16 ext_host_port;
/* External host address and port after translation */
- ip4_address_t ext_host_nat_addr; /* 74-77 */
- u16 ext_host_nat_port; /* 78-79 */
+ ip4_address_t ext_host_nat_addr;
+ u16 ext_host_nat_port;
/* TCP session state */
u8 state;
u32 i2o_fin_seq;
u32 o2i_fin_seq;
}) snat_session_t;
+/* *INDENT-ON* */
-typedef struct {
+typedef struct
+{
ip4_address_t addr;
u32 fib_index;
u32 sessions_per_user_list_head_index;
u32 nstaticsessions;
} snat_user_t;
-typedef struct {
+typedef struct
+{
ip4_address_t addr;
u32 fib_index;
+/* *INDENT-OFF* */
#define _(N, i, n, s) \
u16 busy_##n##_ports; \
u16 * busy_##n##_ports_per_thread; \
uword * busy_##n##_port_bitmap;
foreach_snat_protocol
#undef _
+/* *INDENT-ON* */
} snat_address_t;
-typedef struct {
+typedef struct
+{
u32 fib_index;
u32 refcount;
} nat_outside_fib_t;
-typedef struct {
+typedef struct
+{
+ /* Inside network port */
u16 in_port;
+ /* Outside network address and port */
snat_det_out_key_t out;
+ /* Session state */
u8 state;
+ /* Expire timeout */
u32 expire;
} snat_det_session_t;
-typedef struct {
+typedef struct
+{
+ /* inside IP address range */
ip4_address_t in_addr;
u8 in_plen;
+ /* outside IP address range */
ip4_address_t out_addr;
u8 out_plen;
+ /* inside IP addresses / outside IP addresses */
u32 sharing_ratio;
+ /* number of ports available to internal host */
u16 ports_per_host;
+ /* session counter */
u32 ses_num;
/* vector of sessions */
- snat_det_session_t * sessions;
+ snat_det_session_t *sessions;
} snat_det_map_t;
-typedef struct {
+typedef struct
+{
+ /* backend IP address */
ip4_address_t addr;
+ /* backend port number */
u16 port;
+ /* probability of the backend to be randomly matched */
u8 probability;
u8 prefix;
+ /* backend FIB table */
u32 vrf_id;
u32 fib_index;
} nat44_lb_addr_port_t;
-typedef enum {
+typedef enum
+{
+ /* twice-nat disabled */
TWICE_NAT_DISABLED,
+ /* twice-nat enabled */
TWICE_NAT,
+ /* twice-nat only when src IP equals dst IP after translation */
TWICE_NAT_SELF,
} twice_nat_type_t;
-typedef enum {
+typedef enum
+{
+ /* no load-balancing */
NO_LB_NAT,
+ /* load-balancing */
LB_NAT,
+ /* load-balancing with affinity */
AFFINITY_LB_NAT,
} lb_nat_type_t;
-typedef struct {
+typedef struct
+{
+ /* local IP address */
ip4_address_t local_addr;
+ /* external IP address */
ip4_address_t external_addr;
+ /* local port */
u16 local_port;
+ /* external port */
u16 external_port;
+ /* 1 = 1:1NAT, 0 = 1:1NAPT */
u8 addr_only;
+ /* is twice-nat */
twice_nat_type_t twice_nat;
+ /* 1 = rule match only out2in direction */
u8 out2in_only;
+ /* local FIB table */
u32 vrf_id;
u32 fib_index;
+ /* protocol */
snat_protocol_t proto;
+ /* 0 = disabled, otherwise client IP affinity sticky time in seconds */
u32 affinity;
+ /* worker threads used by backends/local host */
u32 *workers;
+ /* opaque string tag */
u8 *tag;
+ /* backends for load-balancing mode */
nat44_lb_addr_port_t *locals;
+ /* affinity per service lis */
u32 affinity_per_service_list_head_index;
} snat_static_mapping_t;
-typedef struct {
+typedef struct
+{
u32 sw_if_index;
u8 flags;
} snat_interface_t;
-typedef struct {
+typedef struct
+{
ip4_address_t l_addr;
u16 l_port;
u16 e_port;
u8 *tag;
} snat_static_map_resolve_t;
-typedef struct {
+typedef struct
+{
/* Main lookup tables */
clib_bihash_8_8_t out2in;
clib_bihash_8_8_t in2out;
clib_bihash_8_8_t user_hash;
/* User pool */
- snat_user_t * users;
+ snat_user_t *users;
/* Session pool */
- snat_session_t * sessions;
+ snat_session_t *sessions;
/* Pool of doubly-linked list elements */
- dlist_elt_t * list_pool;
+ dlist_elt_t *list_pool;
+ /* NAT thread index */
u32 snat_thread_index;
} snat_main_per_thread_data_t;
struct snat_main_s;
-typedef u32 snat_icmp_match_function_t (struct snat_main_s *sm,
- vlib_node_runtime_t *node,
- u32 thread_index,
- vlib_buffer_t *b0,
- ip4_header_t *ip0,
- u8 *p_proto,
- snat_session_key_t *p_value,
- u8 *p_dont_translate,
- void *d,
- void *e);
-
-typedef u32 (snat_get_worker_function_t) (ip4_header_t * ip, u32 rx_fib_index);
-
-typedef int nat_alloc_out_addr_and_port_function_t (snat_address_t * addresses,
- u32 fib_index,
- u32 thread_index,
- snat_session_key_t * k,
- u32 * address_indexp,
- u16 port_per_thread,
- u32 snat_thread_index);
-
-typedef struct snat_main_s {
- snat_icmp_match_function_t * icmp_match_in2out_cb;
- snat_icmp_match_function_t * icmp_match_out2in_cb;
-
+/* ICMP session match function */
+typedef u32 (snat_icmp_match_function_t) (struct snat_main_s * sm,
+ vlib_node_runtime_t * node,
+ u32 thread_index,
+ vlib_buffer_t * b0,
+ ip4_header_t * ip0, u8 * p_proto,
+ snat_session_key_t * p_value,
+ u8 * p_dont_translate, void *d,
+ void *e);
+
+/* Return worker thread index for given packet */
+typedef u32 (snat_get_worker_function_t) (ip4_header_t * ip,
+ u32 rx_fib_index);
+
+/* NAT address and port allacotaion function */
+typedef int (nat_alloc_out_addr_and_port_function_t) (snat_address_t *
+ addresses,
+ u32 fib_index,
+ u32 thread_index,
+ snat_session_key_t * k,
+ u16 port_per_thread,
+ u32 snat_thread_index);
+
+typedef struct snat_main_s
+{
+ /* ICMP session match functions */
+ snat_icmp_match_function_t *icmp_match_in2out_cb;
+ snat_icmp_match_function_t *icmp_match_out2in_cb;
+
+ /* Thread settings */
u32 num_workers;
u32 first_worker_index;
- u32 * workers;
- snat_get_worker_function_t * worker_in2out_cb;
- snat_get_worker_function_t * worker_out2in_cb;
+ u32 *workers;
+ snat_get_worker_function_t *worker_in2out_cb;
+ snat_get_worker_function_t *worker_out2in_cb;
u16 port_per_thread;
u32 num_snat_thread;
/* Per thread data */
- snat_main_per_thread_data_t * per_thread_data;
+ snat_main_per_thread_data_t *per_thread_data;
/* Find a static mapping by local */
clib_bihash_8_8_t static_mapping_by_local;
clib_bihash_8_8_t static_mapping_by_external;
/* Static mapping pool */
- snat_static_mapping_t * static_mappings;
+ snat_static_mapping_t *static_mappings;
/* Interface pool */
- snat_interface_t * interfaces;
- snat_interface_t * output_feature_interfaces;
+ snat_interface_t *interfaces;
+ snat_interface_t *output_feature_interfaces;
/* Vector of outside addresses */
- snat_address_t * addresses;
+ snat_address_t *addresses;
/* Address and port allocation function */
nat_alloc_out_addr_and_port_function_t *alloc_addr_and_port;
/* Address and port allocation type */
u16 end_port;
/* vector of outside fibs */
- nat_outside_fib_t * outside_fibs;
+ nat_outside_fib_t *outside_fibs;
/* Vector of twice NAT addresses for extenal hosts */
- snat_address_t * twice_nat_addresses;
+ snat_address_t *twice_nat_addresses;
/* sw_if_indices whose intfc addresses should be auto-added */
- u32 * auto_add_sw_if_indices;
- u32 * auto_add_sw_if_indices_twice_nat;
+ u32 *auto_add_sw_if_indices;
+ u32 *auto_add_sw_if_indices_twice_nat;
/* vector of interface address static mappings to resolve. */
snat_static_map_resolve_t *to_resolve;
/* Randomize port allocation order */
u32 random_seed;
- /* Worker handoff index */
+ /* Worker handoff frame-queue index */
u32 fq_in2out_index;
u32 fq_in2out_output_index;
u32 fq_out2in_index;
u32 out2in_node_index;
u32 error_node_index;
- /* Deterministic NAT */
- snat_det_map_t * det_maps;
+ /* Deterministic NAT mappings */
+ snat_det_map_t *det_maps;
/* If forwarding is enabled */
u8 forwarding_enabled;
vlib_log_class_t log_class;
/* convenience */
- vlib_main_t * vlib_main;
- vnet_main_t * vnet_main;
- ip4_main_t * ip4_main;
- ip_lookup_main_t * ip4_lookup_main;
- api_main_t * api_main;
+ vlib_main_t *vlib_main;
+ vnet_main_t *vnet_main;
+ ip4_main_t *ip4_main;
+ ip_lookup_main_t *ip4_lookup_main;
+ api_main_t *api_main;
} snat_main_t;
-typedef struct {
+typedef struct
+{
u32 thread_index;
f64 now;
} nat44_is_idle_session_ctx_t;
+typedef struct
+{
+ u32 cached_sw_if_index;
+ u32 cached_ip4_address;
+} snat_runtime_t;
+
extern snat_main_t snat_main;
extern vlib_node_registration_t snat_in2out_node;
extern vlib_node_registration_t snat_in2out_output_node;
extern vlib_node_registration_t nat44_ed_in2out_output_worker_handoff_node;
extern vlib_node_registration_t nat44_ed_out2in_worker_handoff_node;
-void snat_free_outside_address_and_port (snat_address_t * addresses,
- u32 thread_index,
- snat_session_key_t * k);
-
-int snat_alloc_outside_address_and_port (snat_address_t * addresses,
- u32 fib_index,
- u32 thread_index,
- snat_session_key_t * k,
- u32 * address_indexp,
- u16 port_per_thread,
- u32 snat_thread_index);
-
-int snat_static_mapping_match (snat_main_t * sm,
- snat_session_key_t match,
- snat_session_key_t * mapping,
- u8 by_external,
- u8 *is_addr_only,
- twice_nat_type_t *twice_nat,
- lb_nat_type_t *lb,
- ip4_address_t * ext_host_addr);
-
-void snat_add_del_addr_to_fib (ip4_address_t * addr,
- u8 p_len,
- u32 sw_if_index,
- int is_add);
-
+/* format functions */
format_function_t format_snat_user;
format_function_t format_snat_static_mapping;
format_function_t format_snat_static_map_to_resolve;
format_function_t format_snat_session;
format_function_t format_det_map_ses;
-
-typedef struct {
- u32 cached_sw_if_index;
- u32 cached_ip4_address;
-} snat_runtime_t;
+format_function_t format_snat_key;
+format_function_t format_static_mapping_key;
+format_function_t format_snat_protocol;
+format_function_t format_nat_addr_and_port_alloc_alg;
+format_function_t format_nat44_reass_trace;
+/* unformat functions */
+unformat_function_t unformat_snat_protocol;
/** \brief Check if SNAT session is created from static mapping.
@param s SNAT session
*/
#define is_affinity_sessions(s) (s->flags & SNAT_SESSION_FLAG_AFFINITY)
+/** \brief Check if NAT interface is inside.
+ @param i NAT interfce
+ @return 1 if inside interface
+*/
#define nat_interface_is_inside(i) i->flags & NAT_INTERFACE_FLAG_IS_INSIDE
+
+/** \brief Check if NAT interface is outside.
+ @param i NAT interfce
+ @return 1 if outside interface
+*/
#define nat_interface_is_outside(i) i->flags & NAT_INTERFACE_FLAG_IS_OUTSIDE
+/** \brief Check if NAT44 endpoint-dependent TCP session is closed.
+ @param s NAT session
+ @return 1 if session is closed
+*/
+#define nat44_is_ses_closed(s) s->state == 0xf
+
+/* logging */
#define nat_log_err(...) \
vlib_log(VLIB_LOG_LEVEL_ERR, snat_main.log_class, __VA_ARGS__)
#define nat_log_warn(...) \
#define nat_log_debug(...)\
vlib_log(VLIB_LOG_LEVEL_DEBUG, snat_main.log_class, __VA_ARGS__)
+/* ICMP session match functions */
+u32 icmp_match_in2out_fast (snat_main_t * sm, vlib_node_runtime_t * node,
+ u32 thread_index, vlib_buffer_t * b0,
+ ip4_header_t * ip0, u8 * p_proto,
+ snat_session_key_t * p_value,
+ u8 * p_dont_translate, void *d, void *e);
+u32 icmp_match_in2out_slow (snat_main_t * sm, vlib_node_runtime_t * node,
+ u32 thread_index, vlib_buffer_t * b0,
+ ip4_header_t * ip0, u8 * p_proto,
+ snat_session_key_t * p_value,
+ u8 * p_dont_translate, void *d, void *e);
+u32 icmp_match_out2in_fast (snat_main_t * sm, vlib_node_runtime_t * node,
+ u32 thread_index, vlib_buffer_t * b0,
+ ip4_header_t * ip0, u8 * p_proto,
+ snat_session_key_t * p_value,
+ u8 * p_dont_translate, void *d, void *e);
+u32 icmp_match_out2in_slow (snat_main_t * sm, vlib_node_runtime_t * node,
+ u32 thread_index, vlib_buffer_t * b0,
+ ip4_header_t * ip0, u8 * p_proto,
+ snat_session_key_t * p_value,
+ u8 * p_dont_translate, void *d, void *e);
+
+/* ICMP deterministic NAT session match functions */
+u32 icmp_match_out2in_det (snat_main_t * sm, vlib_node_runtime_t * node,
+ u32 thread_index, vlib_buffer_t * b0,
+ ip4_header_t * ip0, u8 * p_proto,
+ snat_session_key_t * p_value,
+ u8 * p_dont_translate, void *d, void *e);
+u32 icmp_match_in2out_det (snat_main_t * sm, vlib_node_runtime_t * node,
+ u32 thread_index, vlib_buffer_t * b0,
+ ip4_header_t * ip0, u8 * p_proto,
+ snat_session_key_t * p_value,
+ u8 * p_dont_translate, void *d, void *e);
+
+/* ICMP endpoint-dependent session match functions */
+u32 icmp_match_out2in_ed (snat_main_t * sm, vlib_node_runtime_t * node,
+ u32 thread_index, vlib_buffer_t * b0,
+ ip4_header_t * ip0, u8 * p_proto,
+ snat_session_key_t * p_value,
+ u8 * p_dont_translate, void *d, void *e);
+u32 icmp_match_in2out_ed (snat_main_t * sm, vlib_node_runtime_t * node,
+ u32 thread_index, vlib_buffer_t * b0,
+ ip4_header_t * ip0, u8 * p_proto,
+ snat_session_key_t * p_value,
+ u8 * p_dont_translate, void *d, void *e);
+
+u32 icmp_in2out (snat_main_t * sm, vlib_buffer_t * b0, ip4_header_t * ip0,
+ icmp46_header_t * icmp0, u32 sw_if_index0, u32 rx_fib_index0,
+ vlib_node_runtime_t * node, u32 next0, u32 thread_index,
+ void *d, void *e);
+
+u32 icmp_out2in (snat_main_t * sm, vlib_buffer_t * b0, ip4_header_t * ip0,
+ icmp46_header_t * icmp0, u32 sw_if_index0, u32 rx_fib_index0,
+ vlib_node_runtime_t * node, u32 next0, u32 thread_index,
+ void *d, void *e);
+
+/* hairpinning functions */
+u32 snat_icmp_hairpinning (snat_main_t * sm, vlib_buffer_t * b0,
+ ip4_header_t * ip0, icmp46_header_t * icmp0,
+ int is_ed);
+void nat_hairpinning_sm_unknown_proto (snat_main_t * sm, vlib_buffer_t * b,
+ ip4_header_t * ip);
+void nat44_ed_hairpinning_unknown_proto (snat_main_t * sm, vlib_buffer_t * b,
+ ip4_header_t * ip);
+int snat_hairpinning (snat_main_t * sm, vlib_buffer_t * b0,
+ ip4_header_t * ip0, udp_header_t * udp0,
+ tcp_header_t * tcp0, u32 proto0, int is_ed);
+void nat44_reass_hairpinning (snat_main_t * sm, vlib_buffer_t * b0,
+ ip4_header_t * ip0, u16 sport, u16 dport,
+ u32 proto0, int is_ed);
+
+/* Call back functions for clib_bihash_add_or_overwrite_stale */
+int nat44_i2o_ed_is_idle_session_cb (clib_bihash_kv_16_8_t * kv, void *arg);
+int nat44_o2i_ed_is_idle_session_cb (clib_bihash_kv_16_8_t * kv, void *arg);
+int nat44_i2o_is_idle_session_cb (clib_bihash_kv_8_8_t * kv, void *arg);
+int nat44_o2i_is_idle_session_cb (clib_bihash_kv_8_8_t * kv, void *arg);
+
+/**
+ * @brief Increment IPv4 address
+ */
+void increment_v4_address (ip4_address_t * a);
+
+/**
+ * @brief Add external address to NAT44 pool
+ *
+ * @param addr IPv4 address
+ * @param vrf_id VRF id of tenant, ~0 means independent of VRF
+ * @param twice_nat 1 if twice NAT address
+ *
+ * @return 0 on success, non-zero value otherwise
+ */
+int snat_add_address (snat_main_t * sm, ip4_address_t * addr, u32 vrf_id,
+ u8 twice_nat);
+
+/**
+ * @brief Delete external address from NAT44 pool
+ *
+ * @param addr IPv4 address
+ * @param delete_sm 1 if delete static mapping using address
+ * @param twice_nat 1 if twice NAT address
+ *
+ * @return 0 on success, non-zero value otherwise
+ */
+int snat_del_address (snat_main_t * sm, ip4_address_t addr, u8 delete_sm,
+ u8 twice_nat);
+
+/**
+ * @brief Add/delete external address to FIB DPO (out2in DPO mode)
+ *
+ * @param addr IPv4 address
+ * @param is_add 1 = add, 0 = delete
+ *
+ * @return 0 on success, non-zero value otherwise
+ */
+void nat44_add_del_address_dpo (ip4_address_t addr, u8 is_add);
+
+/**
+ * @brief Add/delete NAT44 static mapping
+ *
+ * @param l_addr local IPv4 address
+ * @param e_addr external IPv4 address
+ * @param l_port local port number
+ * @param e_port external port number
+ * @param vrf_id local VRF ID
+ * @param addr_only 1 = 1:1NAT, 0 = 1:1NAPT
+ * @param sw_if_index use interface address as external IPv4 address
+ * @param proto L4 protocol
+ * @param is_add 1 = add, 0 = delete
+ * @param twice_nat twice-nat mode
+ * @param out2in_only if 1 rule match only out2in direction
+ * @param tagi opaque string tag
+ *
+ * @return 0 on success, non-zero value otherwise
+ */
+int snat_add_static_mapping (ip4_address_t l_addr, ip4_address_t e_addr,
+ u16 l_port, u16 e_port, u32 vrf_id,
+ int addr_only, u32 sw_if_index,
+ snat_protocol_t proto, int is_add,
+ twice_nat_type_t twice_nat, u8 out2in_only,
+ u8 * tag);
+
+/**
+ * @brief Add/delete static mapping with load-balancing (multiple backends)
+ *
+ * @param e_addr external IPv4 address
+ * @param e_port external port number
+ * @param proto L4 protocol
+ * @param locals list of local backends
+ * @param is_add 1 = add, 0 = delete
+ * @param twice_nat twice-nat mode
+ * @param out2in_only if 1 rule match only out2in direction
+ * @param tag opaque string tag
+ * @param affinity 0 = disabled, otherwise client IP affinity sticky time
+ *
+ * @return 0 on success, non-zero value otherwise
+ */
+int nat44_add_del_lb_static_mapping (ip4_address_t e_addr, u16 e_port,
+ snat_protocol_t proto,
+ nat44_lb_addr_port_t * locals, u8 is_add,
+ twice_nat_type_t twice_nat,
+ u8 out2in_only, u8 * tag, u32 affinity);
+
+clib_error_t *snat_api_init (vlib_main_t * vm, snat_main_t * sm);
+
+/**
+ * @brief Set NAT plugin workers
+ *
+ * @param bitmap NAT workers bitmap
+ *
+ * @return 0 on success, non-zero value otherwise
+ */
+int snat_set_workers (uword * bitmap);
+
+/**
+ * @brief Enable/disable NAT44 feature on the interface
+ *
+ * @param sw_if_index software index of the interface
+ * @param is_inside 1 = inside, 0 = outside
+ * @param is_del 1 = delete, 0 = add
+ *
+ * @return 0 on success, non-zero value otherwise
+ */
+int snat_interface_add_del (u32 sw_if_index, u8 is_inside, int is_del);
+
+/**
+ * @brief Enable/disable NAT44 output feature on the interface (postrouting NAT)
+ *
+ * @param sw_if_index software index of the interface
+ * @param is_inside 1 = inside, 0 = outside
+ * @param is_del 1 = delete, 0 = add
+ *
+ * @return 0 on success, non-zero value otherwise
+ */
+int snat_interface_add_del_output_feature (u32 sw_if_index, u8 is_inside,
+ int is_del);
+
+/**
+ * @brief Add/delete NAT44 pool address from specific interfce
+ *
+ * @param sw_if_index software index of the interface
+ * @param is_del 1 = delete, 0 = add
+ * @param twice_nat 1 = twice NAT address for extenal hosts
+ *
+ * @return 0 on success, non-zero value otherwise
+ */
+int snat_add_interface_address (snat_main_t * sm, u32 sw_if_index, int is_del,
+ u8 twice_nat);
+
+/**
+ * @brief Delete NAT44 session
+ *
+ * @param addr IPv4 address
+ * @param port L4 port number
+ * @param proto L4 protocol
+ * @param vrf_id VRF ID
+ * @param is_in 1 = inside network addres and por pair, 0 = outside
+ *
+ * @return 0 on success, non-zero value otherwise
+ */
+int nat44_del_session (snat_main_t * sm, ip4_address_t * addr, u16 port,
+ snat_protocol_t proto, u32 vrf_id, int is_in);
+
+/**
+ * @brief Delete NAT44 endpoint-dependent session
+ *
+ * @param addr IPv4 address
+ * @param port L4 port number
+ * @param proto L4 protocol
+ * @param vrf_id VRF ID
+ * @param is_in 1 = inside network addres and por pair, 0 = outside
+ *
+ * @return 0 on success, non-zero value otherwise
+ */
+int nat44_del_ed_session (snat_main_t * sm, ip4_address_t * addr, u16 port,
+ ip4_address_t * eh_addr, u16 eh_port, u8 proto,
+ u32 vrf_id, int is_in);
+
+/**
+ * @brief Free NAT44 session data (lookup keys, external addrres port)
+ *
+ * @param s NAT session
+ * @param thread_index thread index
+ */
+void nat_free_session_data (snat_main_t * sm, snat_session_t * s,
+ u32 thread_index);
+
+/**
+ * @brief Find or create NAT user
+ *
+ * @param addr IPv4 address
+ * @param fib_index FIB table index
+ * @param thread_index thread index
+ *
+ * @return NAT user data structure on success otherwise zero value
+ */
+snat_user_t *nat_user_get_or_create (snat_main_t * sm, ip4_address_t * addr,
+ u32 fib_index, u32 thread_index);
+
+/**
+ * @brief Allocate new NAT session or recycle last used
+ *
+ * @param u NAT user
+ * @param thread_index thread index
+ *
+ * @return session data structure on success otherwise zero value
+ */
+snat_session_t *nat_session_alloc_or_recycle (snat_main_t * sm,
+ snat_user_t * u,
+ u32 thread_index);
+
+/**
+ * @brief Allocate NAT endpoint-dependent session
+ *
+ * @param u NAT user
+ * @param thread_index thread index
+ *
+ * @return session data structure on success otherwise zero value
+ */
+snat_session_t *nat_ed_session_alloc (snat_main_t * sm, snat_user_t * u,
+ u32 thread_index);
+
+/**
+ * @brief Set address and port assignment algorithm for MAP-E CE
+ *
+ * @param psid Port Set Identifier value
+ * @param psid_offset number of offset bits
+ * @param psid_length length of PSID
+ */
+void nat_set_alloc_addr_and_port_mape (u16 psid, u16 psid_offset,
+ u16 psid_length);
+
+/**
+ * @brief Set address and port assignment algorithm for port range
+ *
+ * @param start_port beginning of the port range
+ * @param end_port end of the port range
+ */
+void nat_set_alloc_addr_and_port_range (u16 start_port, u16 end_port);
+
+/**
+ * @brief Set address and port assignment algorithm to default/standard
+ */
+void nat_set_alloc_addr_and_port_default (void);
+
+/**
+ * @brief Free outside address and port pair
+ *
+ * @param addresses vector of outside addresses
+ * @param thread_index thread index
+ * @param k adddress, port and protocol
+ */
+void snat_free_outside_address_and_port (snat_address_t * addresses,
+ u32 thread_index,
+ snat_session_key_t * k);
+
+/**
+ * @brief Alloc outside address and port
+ *
+ * @param addresses vector of outside addresses
+ * @param fib_index FIB table index
+ * @param thread_index thread index
+ * @param k allocated address and port pair
+ * @param port_per_thread number of ports per threead
+ * @param snat_thread_index NAT thread index
+ *
+ * @return 0 on success, non-zero value otherwise
+ */
+int snat_alloc_outside_address_and_port (snat_address_t * addresses,
+ u32 fib_index,
+ u32 thread_index,
+ snat_session_key_t * k,
+ u16 port_per_thread,
+ u32 snat_thread_index);
+
+/**
+ * @brief Match NAT44 static mapping.
+ *
+ * @param match address and port to match
+ * @param mapping external/local address and port of the matched mapping
+ * @param by_external if 0 match by local address otherwise match by external
+ * address
+ * @param is_addr_only 1 if matched mapping is address only
+ * @param twice_nat matched mapping is twice NAT type
+ * @param lb 1 if matched mapping is load-balanced
+ * @param ext_host_addr external host address
+ *
+ * @returns 0 if match found otherwise 1.
+ */
+int snat_static_mapping_match (snat_main_t * sm,
+ snat_session_key_t match,
+ snat_session_key_t * mapping,
+ u8 by_external,
+ u8 * is_addr_only,
+ twice_nat_type_t * twice_nat,
+ lb_nat_type_t * lb,
+ ip4_address_t * ext_host_addr);
+
+/**
+ * @brief Add/del NAT address to FIB.
+ *
+ * Add the external NAT address to the FIB as receive entries. This ensures
+ * that VPP will reply to ARP for this address and we don't need to enable
+ * proxy ARP on the outside interface.
+ *
+ * @param addr IPv4 address
+ * @param plen address prefix length
+ * @param sw_if_index software index of the outside interface
+ * @param is_add 0 = delete, 1 = add.
+ */
+void snat_add_del_addr_to_fib (ip4_address_t * addr,
+ u8 p_len, u32 sw_if_index, int is_add);
+
+
/*
* Why is this here? Because we don't need to touch this layer to
* simply reply to an icmp. We need to change id to a unique
* value to NAT an echo request/reply.
*/
-typedef struct {
+typedef struct
+{
u16 identifier;
u16 sequence;
} icmp_echo_header_t;
-typedef struct {
+typedef struct
+{
u16 src_port, dst_port;
} tcp_udp_header_t;
-u32 icmp_match_in2out_fast(snat_main_t *sm, vlib_node_runtime_t *node,
- u32 thread_index, vlib_buffer_t *b0,
- ip4_header_t *ip0, u8 *p_proto,
- snat_session_key_t *p_value,
- u8 *p_dont_translate, void *d, void *e);
-u32 icmp_match_in2out_slow(snat_main_t *sm, vlib_node_runtime_t *node,
- u32 thread_index, vlib_buffer_t *b0,
- ip4_header_t *ip0, u8 *p_proto,
- snat_session_key_t *p_value,
- u8 *p_dont_translate, void *d, void *e);
-u32 icmp_match_in2out_det(snat_main_t *sm, vlib_node_runtime_t *node,
- u32 thread_index, vlib_buffer_t *b0,
- ip4_header_t *ip0, u8 *p_proto,
- snat_session_key_t *p_value,
- u8 *p_dont_translate, void *d, void *e);
-u32 icmp_match_in2out_ed(snat_main_t *sm, vlib_node_runtime_t *node,
- u32 thread_index, vlib_buffer_t *b0,
- ip4_header_t *ip0, u8 *p_proto,
- snat_session_key_t *p_value,
- u8 *p_dont_translate, void *d, void *e);
-u32 icmp_match_out2in_fast(snat_main_t *sm, vlib_node_runtime_t *node,
- u32 thread_index, vlib_buffer_t *b0,
- ip4_header_t *ip0, u8 *p_proto,
- snat_session_key_t *p_value,
- u8 *p_dont_translate, void *d, void *e);
-u32 icmp_match_out2in_slow(snat_main_t *sm, vlib_node_runtime_t *node,
- u32 thread_index, vlib_buffer_t *b0,
- ip4_header_t *ip0, u8 *p_proto,
- snat_session_key_t *p_value,
- u8 *p_dont_translate, void *d, void *e);
-u32 icmp_match_out2in_det(snat_main_t *sm, vlib_node_runtime_t *node,
- u32 thread_index, vlib_buffer_t *b0,
- ip4_header_t *ip0, u8 *p_proto,
- snat_session_key_t *p_value,
- u8 *p_dont_translate, void *d, void *e);
-u32 icmp_match_out2in_ed(snat_main_t *sm, vlib_node_runtime_t *node,
- u32 thread_index, vlib_buffer_t *b0,
- ip4_header_t *ip0, u8 *p_proto,
- snat_session_key_t *p_value,
- u8 *p_dont_translate, void *d, void *e);
-void increment_v4_address(ip4_address_t * a);
-int snat_add_address(snat_main_t *sm, ip4_address_t *addr, u32 vrf_id,
- u8 twice_nat);
-int snat_del_address(snat_main_t *sm, ip4_address_t addr, u8 delete_sm,
- u8 twice_nat);
-void nat44_add_del_address_dpo (ip4_address_t addr, u8 is_add);
-int snat_add_static_mapping(ip4_address_t l_addr, ip4_address_t e_addr,
- u16 l_port, u16 e_port, u32 vrf_id, int addr_only,
- u32 sw_if_index, snat_protocol_t proto, int is_add,
- twice_nat_type_t twice_nat, u8 out2in_only,
- u8 *tag);
-clib_error_t * snat_api_init(vlib_main_t * vm, snat_main_t * sm);
-int snat_set_workers (uword * bitmap);
-int snat_interface_add_del(u32 sw_if_index, u8 is_inside, int is_del);
-int snat_interface_add_del_output_feature(u32 sw_if_index, u8 is_inside,
- int is_del);
-int snat_add_interface_address(snat_main_t *sm, u32 sw_if_index, int is_del,
- u8 twice_nat);
-uword unformat_snat_protocol(unformat_input_t * input, va_list * args);
-u8 * format_snat_protocol(u8 * s, va_list * args);
-u8 * format_nat_addr_and_port_alloc_alg(u8 * s, va_list * args);
-int nat44_add_del_lb_static_mapping (ip4_address_t e_addr, u16 e_port,
- snat_protocol_t proto,
- nat44_lb_addr_port_t *locals, u8 is_add,
- twice_nat_type_t twice_nat, u8 out2in_only,
- u8 *tag, u32 affinity);
-int nat44_del_session (snat_main_t *sm, ip4_address_t *addr, u16 port,
- snat_protocol_t proto, u32 vrf_id, int is_in);
-int nat44_del_ed_session (snat_main_t *sm, ip4_address_t *addr, u16 port,
- ip4_address_t *eh_addr, u16 eh_port, u8 proto,
- u32 vrf_id, int is_in);
-void nat_free_session_data (snat_main_t * sm, snat_session_t * s,
- u32 thread_index);
-snat_user_t * nat_user_get_or_create (snat_main_t *sm, ip4_address_t *addr,
- u32 fib_index, u32 thread_index);
-snat_session_t * nat_session_alloc_or_recycle (snat_main_t *sm, snat_user_t *u,
- u32 thread_index);
-snat_session_t * nat_ed_session_alloc (snat_main_t *sm, snat_user_t *u,
- u32 thread_index);
-void nat_set_alloc_addr_and_port_mape (u16 psid, u16 psid_offset,
- u16 psid_length);
-void nat_set_alloc_addr_and_port_range (u16 start_port, u16 end_port);
-void nat_set_alloc_addr_and_port_default (void);
-int nat44_i2o_ed_is_idle_session_cb (clib_bihash_kv_16_8_t *kv, void *arg);
-int nat44_o2i_ed_is_idle_session_cb (clib_bihash_kv_16_8_t *kv, void *arg);
-int nat44_i2o_is_idle_session_cb (clib_bihash_kv_8_8_t *kv, void *arg);
-int nat44_o2i_is_idle_session_cb (clib_bihash_kv_8_8_t *kv, void *arg);
+#endif /* __included_nat_h__ */
-#endif /* __included_snat_h__ */
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
--- /dev/null
+/*
+ * Copyright (c) 2018 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/**
+ * @file
+ * @brief Classify for one armed NAT44 (in+out interface)
+ */
+
+#include <vlib/vlib.h>
+#include <vnet/vnet.h>
+#include <vnet/fib/ip4_fib.h>
+#include <nat/nat.h>
+#include <nat/nat_reass.h>
+#include <nat/nat_inlines.h>
+
+vlib_node_registration_t nat44_classify_node;
+vlib_node_registration_t nat44_ed_classify_node;
+vlib_node_registration_t nat44_det_classify_node;
+vlib_node_registration_t nat44_handoff_classify_node;
+
+#define foreach_nat44_classify_error \
+_(MAX_REASS, "Maximum reassemblies exceeded") \
+_(MAX_FRAG, "Maximum fragments per reassembly exceeded")
+
+typedef enum
+{
+#define _(sym,str) NAT44_CLASSIFY_ERROR_##sym,
+ foreach_nat44_classify_error
+#undef _
+ NAT44_CLASSIFY_N_ERROR,
+} nat44_classify_error_t;
+
+static char *nat44_classify_error_strings[] = {
+#define _(sym,string) string,
+ foreach_nat44_classify_error
+#undef _
+};
+
+typedef enum
+{
+ NAT44_CLASSIFY_NEXT_IN2OUT,
+ NAT44_CLASSIFY_NEXT_OUT2IN,
+ NAT44_CLASSIFY_NEXT_DROP,
+ NAT44_CLASSIFY_N_NEXT,
+} nat44_classify_next_t;
+
+typedef struct
+{
+ u8 next_in2out;
+ u8 cached;
+} nat44_classify_trace_t;
+
+static u8 *
+format_nat44_classify_trace (u8 * s, va_list * args)
+{
+ CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
+ CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
+ nat44_classify_trace_t *t = va_arg (*args, nat44_classify_trace_t *);
+ char *next;
+
+ if (t->cached)
+ s = format (s, "nat44-classify: fragment cached");
+ else
+ {
+ next = t->next_in2out ? "nat44-in2out" : "nat44-out2in";
+ s = format (s, "nat44-classify: next %s", next);
+ }
+
+ return s;
+}
+
+static inline uword
+nat44_classify_node_fn_inline (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame, int is_ed)
+{
+ u32 n_left_from, *from, *to_next;
+ nat44_classify_next_t next_index;
+ snat_main_t *sm = &snat_main;
+ snat_static_mapping_t *m;
+ u32 thread_index = vm->thread_index;
+ snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
+ u32 *fragments_to_drop = 0;
+ u32 *fragments_to_loopback = 0;
+
+ from = vlib_frame_vector_args (frame);
+ n_left_from = frame->n_vectors;
+ next_index = node->cached_next_index;
+
+ while (n_left_from > 0)
+ {
+ u32 n_left_to_next;
+
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+ while (n_left_from > 0 && n_left_to_next > 0)
+ {
+ u32 bi0;
+ vlib_buffer_t *b0;
+ u32 next0 = NAT44_CLASSIFY_NEXT_IN2OUT, sw_if_index0, rx_fib_index0;
+ ip4_header_t *ip0;
+ snat_address_t *ap;
+ snat_session_key_t m_key0;
+ clib_bihash_kv_8_8_t kv0, value0;
+ clib_bihash_kv_16_8_t ed_kv0, ed_value0;
+ udp_header_t *udp0;
+ nat_reass_ip4_t *reass0;
+ u8 cached0 = 0;
+
+ /* speculatively enqueue b0 to the current next frame */
+ bi0 = from[0];
+ to_next[0] = bi0;
+ from += 1;
+ to_next += 1;
+ n_left_from -= 1;
+ n_left_to_next -= 1;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ ip0 = vlib_buffer_get_current (b0);
+ udp0 = ip4_next_header (ip0);
+
+ if (is_ed && ip0->protocol != IP_PROTOCOL_ICMP)
+ {
+ if (!ip4_is_fragment (ip0) || ip4_is_first_fragment (ip0))
+ {
+ /* process leading fragment/whole packet (with L4 header) */
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+ rx_fib_index0 =
+ fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
+ sw_if_index0);
+ make_ed_kv (&ed_kv0, &ip0->src_address, &ip0->dst_address,
+ ip0->protocol, rx_fib_index0, udp0->src_port,
+ udp0->dst_port);
+ if (ip4_is_fragment (ip0))
+ {
+ reass0 = nat_ip4_reass_find_or_create (ip0->src_address,
+ ip0->dst_address,
+ ip0->fragment_id,
+ ip0->protocol,
+ 1,
+ &fragments_to_drop);
+ if (PREDICT_FALSE (!reass0))
+ {
+ next0 = NAT44_CLASSIFY_NEXT_DROP;
+ b0->error =
+ node->errors[NAT44_CLASSIFY_ERROR_MAX_REASS];
+ nat_log_notice ("maximum reassemblies exceeded");
+ goto enqueue0;
+ }
+ if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &ed_kv0,
+ &ed_value0))
+ {
+ /* session exists so classify as IN2OUT,
+ * save this information for future fragments and set
+ * past fragments to be looped over and reprocessed */
+ reass0->sess_index = ed_value0.value;
+ reass0->classify_next =
+ NAT_REASS_IP4_CLASSIFY_NEXT_IN2OUT;
+ nat_ip4_reass_get_frags (reass0,
+ &fragments_to_loopback);
+ goto enqueue0;
+ }
+ else
+ {
+ /* session doesn't exist so continue in the code,
+ * save this information for future fragments and set
+ * past fragments to be looped over and reprocessed */
+ reass0->flags |=
+ NAT_REASS_FLAG_CLASSIFY_ED_CONTINUE;
+ nat_ip4_reass_get_frags (reass0,
+ &fragments_to_loopback);
+ }
+ }
+ else
+ {
+ /* process whole packet */
+ if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &ed_kv0,
+ &ed_value0))
+ goto enqueue0;
+ /* session doesn't exist so continue in code */
+ }
+ }
+ else
+ {
+ /* process non-first fragment */
+ reass0 = nat_ip4_reass_find_or_create (ip0->src_address,
+ ip0->dst_address,
+ ip0->fragment_id,
+ ip0->protocol,
+ 1,
+ &fragments_to_drop);
+ if (PREDICT_FALSE (!reass0))
+ {
+ next0 = NAT44_CLASSIFY_NEXT_DROP;
+ b0->error =
+ node->errors[NAT44_CLASSIFY_ERROR_MAX_REASS];
+ nat_log_notice ("maximum reassemblies exceeded");
+ goto enqueue0;
+ }
+ /* check if first fragment has arrived */
+ if (reass0->classify_next == NAT_REASS_IP4_CLASSIFY_NONE &&
+ !(reass0->flags & NAT_REASS_FLAG_CLASSIFY_ED_CONTINUE))
+ {
+ /* first fragment still hasn't arrived, cache this fragment */
+ if (nat_ip4_reass_add_fragment (reass0, bi0,
+ &fragments_to_drop))
+ {
+ b0->error =
+ node->errors[NAT44_CLASSIFY_ERROR_MAX_FRAG];
+ nat_log_notice
+ ("maximum fragments per reassembly exceeded");
+ next0 = NAT44_CLASSIFY_NEXT_DROP;
+ goto enqueue0;
+ }
+ cached0 = 1;
+ goto enqueue0;
+ }
+ if (reass0->classify_next ==
+ NAT_REASS_IP4_CLASSIFY_NEXT_IN2OUT)
+ goto enqueue0;
+ /* flag NAT_REASS_FLAG_CLASSIFY_ED_CONTINUE is set
+ * so keep the default next0 and continue in code to
+ * potentially find other classification for this packet */
+ }
+ }
+
+ /* *INDENT-OFF* */
+ vec_foreach (ap, sm->addresses)
+ {
+ if (ip0->dst_address.as_u32 == ap->addr.as_u32)
+ {
+ next0 = NAT44_CLASSIFY_NEXT_OUT2IN;
+ goto enqueue0;
+ }
+ }
+ /* *INDENT-ON* */
+
+ if (PREDICT_FALSE (pool_elts (sm->static_mappings)))
+ {
+ m_key0.addr = ip0->dst_address;
+ m_key0.port = 0;
+ m_key0.protocol = 0;
+ m_key0.fib_index = 0;
+ kv0.key = m_key0.as_u64;
+ /* try to classify the fragment based on IP header alone */
+ if (!clib_bihash_search_8_8 (&sm->static_mapping_by_external,
+ &kv0, &value0))
+ {
+ m = pool_elt_at_index (sm->static_mappings, value0.value);
+ if (m->local_addr.as_u32 != m->external_addr.as_u32)
+ next0 = NAT44_CLASSIFY_NEXT_OUT2IN;
+ goto enqueue0;
+ }
+ if (!ip4_is_fragment (ip0) || ip4_is_first_fragment (ip0))
+ {
+ /* process leading fragment/whole packet (with L4 header) */
+ m_key0.port = clib_net_to_host_u16 (udp0->dst_port);
+ m_key0.protocol = ip_proto_to_snat_proto (ip0->protocol);
+ kv0.key = m_key0.as_u64;
+ if (!clib_bihash_search_8_8
+ (&sm->static_mapping_by_external, &kv0, &value0))
+ {
+ m =
+ pool_elt_at_index (sm->static_mappings, value0.value);
+ if (m->local_addr.as_u32 != m->external_addr.as_u32)
+ next0 = NAT44_CLASSIFY_NEXT_OUT2IN;
+ }
+ if (ip4_is_fragment (ip0))
+ {
+ reass0 = nat_ip4_reass_find_or_create (ip0->src_address,
+ ip0->dst_address,
+ ip0->fragment_id,
+ ip0->protocol,
+ 1,
+ &fragments_to_drop);
+ if (PREDICT_FALSE (!reass0))
+ {
+ next0 = NAT44_CLASSIFY_NEXT_DROP;
+ b0->error =
+ node->errors[NAT44_CLASSIFY_ERROR_MAX_REASS];
+ nat_log_notice ("maximum reassemblies exceeded");
+ goto enqueue0;
+ }
+ /* save classification for future fragments and set past
+ * fragments to be looped over and reprocessed */
+ if (next0 == NAT44_CLASSIFY_NEXT_OUT2IN)
+ reass0->classify_next =
+ NAT_REASS_IP4_CLASSIFY_NEXT_OUT2IN;
+ else
+ reass0->classify_next =
+ NAT_REASS_IP4_CLASSIFY_NEXT_IN2OUT;
+ nat_ip4_reass_get_frags (reass0,
+ &fragments_to_loopback);
+ }
+ }
+ else
+ {
+ /* process non-first fragment */
+ reass0 = nat_ip4_reass_find_or_create (ip0->src_address,
+ ip0->dst_address,
+ ip0->fragment_id,
+ ip0->protocol,
+ 1,
+ &fragments_to_drop);
+ if (PREDICT_FALSE (!reass0))
+ {
+ next0 = NAT44_CLASSIFY_NEXT_DROP;
+ b0->error =
+ node->errors[NAT44_CLASSIFY_ERROR_MAX_REASS];
+ nat_log_notice ("maximum reassemblies exceeded");
+ goto enqueue0;
+ }
+ if (reass0->classify_next == NAT_REASS_IP4_CLASSIFY_NONE)
+ /* first fragment still hasn't arrived */
+ {
+ if (nat_ip4_reass_add_fragment (reass0, bi0,
+ &fragments_to_drop))
+ {
+ b0->error =
+ node->errors[NAT44_CLASSIFY_ERROR_MAX_FRAG];
+ nat_log_notice
+ ("maximum fragments per reassembly exceeded");
+ next0 = NAT44_CLASSIFY_NEXT_DROP;
+ goto enqueue0;
+ }
+ cached0 = 1;
+ goto enqueue0;
+ }
+ else if (reass0->classify_next ==
+ NAT_REASS_IP4_CLASSIFY_NEXT_OUT2IN)
+ next0 = NAT44_CLASSIFY_NEXT_OUT2IN;
+ else if (reass0->classify_next ==
+ NAT_REASS_IP4_CLASSIFY_NEXT_IN2OUT)
+ next0 = NAT44_CLASSIFY_NEXT_IN2OUT;
+ }
+ }
+
+ enqueue0:
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ nat44_classify_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->cached = cached0;
+ if (!cached0)
+ t->next_in2out = next0 == NAT44_CLASSIFY_NEXT_IN2OUT ? 1 : 0;
+ }
+
+ if (cached0)
+ {
+ n_left_to_next++;
+ to_next--;
+ }
+ else
+ /* verify speculative enqueue, maybe switch current next frame */
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
+ to_next, n_left_to_next,
+ bi0, next0);
+
+ if (n_left_from == 0 && vec_len (fragments_to_loopback))
+ {
+ from = vlib_frame_vector_args (frame);
+ u32 len = vec_len (fragments_to_loopback);
+ if (len <= VLIB_FRAME_SIZE)
+ {
+ clib_memcpy (from, fragments_to_loopback,
+ sizeof (u32) * len);
+ n_left_from = len;
+ vec_reset_length (fragments_to_loopback);
+ }
+ else
+ {
+ clib_memcpy (from,
+ fragments_to_loopback + (len -
+ VLIB_FRAME_SIZE),
+ sizeof (u32) * VLIB_FRAME_SIZE);
+ n_left_from = VLIB_FRAME_SIZE;
+ _vec_len (fragments_to_loopback) = len - VLIB_FRAME_SIZE;
+ }
+ }
+ }
+
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
+
+ nat_send_all_to_node (vm, fragments_to_drop, node, 0,
+ NAT44_CLASSIFY_NEXT_DROP);
+
+ vec_free (fragments_to_drop);
+
+ return frame->n_vectors;
+}
+
+static uword
+nat44_classify_node_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+ return nat44_classify_node_fn_inline (vm, node, frame, 0);
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (nat44_classify_node) = {
+ .function = nat44_classify_node_fn,
+ .name = "nat44-classify",
+ .vector_size = sizeof (u32),
+ .format_trace = format_nat44_classify_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .n_errors = ARRAY_LEN(nat44_classify_error_strings),
+ .error_strings = nat44_classify_error_strings,
+ .n_next_nodes = NAT44_CLASSIFY_N_NEXT,
+ .next_nodes = {
+ [NAT44_CLASSIFY_NEXT_IN2OUT] = "nat44-in2out",
+ [NAT44_CLASSIFY_NEXT_OUT2IN] = "nat44-out2in",
+ [NAT44_CLASSIFY_NEXT_DROP] = "error-drop",
+ },
+};
+/* *INDENT-ON* */
+
+VLIB_NODE_FUNCTION_MULTIARCH (nat44_classify_node, nat44_classify_node_fn);
+static uword
+nat44_ed_classify_node_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+ return nat44_classify_node_fn_inline (vm, node, frame, 1);
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (nat44_ed_classify_node) = {
+ .function = nat44_ed_classify_node_fn,
+ .name = "nat44-ed-classify",
+ .vector_size = sizeof (u32),
+ .format_trace = format_nat44_classify_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .n_next_nodes = NAT44_CLASSIFY_N_NEXT,
+ .next_nodes = {
+ [NAT44_CLASSIFY_NEXT_IN2OUT] = "nat44-ed-in2out",
+ [NAT44_CLASSIFY_NEXT_OUT2IN] = "nat44-ed-out2in",
+ [NAT44_CLASSIFY_NEXT_DROP] = "error-drop",
+ },
+};
+/* *INDENT-ON* */
+
+VLIB_NODE_FUNCTION_MULTIARCH (nat44_ed_classify_node,
+ nat44_ed_classify_node_fn);
+
+static uword
+nat44_det_classify_node_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+ return nat44_classify_node_fn_inline (vm, node, frame, 0);
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (nat44_det_classify_node) = {
+ .function = nat44_det_classify_node_fn,
+ .name = "nat44-det-classify",
+ .vector_size = sizeof (u32),
+ .format_trace = format_nat44_classify_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .n_next_nodes = NAT44_CLASSIFY_N_NEXT,
+ .next_nodes = {
+ [NAT44_CLASSIFY_NEXT_IN2OUT] = "nat44-det-in2out",
+ [NAT44_CLASSIFY_NEXT_OUT2IN] = "nat44-det-out2in",
+ [NAT44_CLASSIFY_NEXT_DROP] = "error-drop",
+ },
+};
+/* *INDENT-ON* */
+
+VLIB_NODE_FUNCTION_MULTIARCH (nat44_det_classify_node,
+ nat44_det_classify_node_fn);
+
+static uword
+nat44_handoff_classify_node_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ return nat44_classify_node_fn_inline (vm, node, frame, 0);
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (nat44_handoff_classify_node) = {
+ .function = nat44_handoff_classify_node_fn,
+ .name = "nat44-handoff-classify",
+ .vector_size = sizeof (u32),
+ .format_trace = format_nat44_classify_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .n_next_nodes = NAT44_CLASSIFY_N_NEXT,
+ .next_nodes = {
+ [NAT44_CLASSIFY_NEXT_IN2OUT] = "nat44-in2out-worker-handoff",
+ [NAT44_CLASSIFY_NEXT_OUT2IN] = "nat44-out2in-worker-handoff",
+ [NAT44_CLASSIFY_NEXT_DROP] = "error-drop",
+ },
+};
+
+VLIB_NODE_FUNCTION_MULTIARCH (nat44_handoff_classify_node,
+ nat44_handoff_classify_node_fn);
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
--- /dev/null
+/*
+ * Copyright (c) 2018 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/**
+ * @file
+ * @brief NAT44 hairpinning
+ */
+
+#include <vlib/vlib.h>
+#include <vnet/vnet.h>
+#include <vnet/fib/ip4_fib.h>
+#include <nat/nat.h>
+#include <nat/nat_inlines.h>
+#include <nat/nat_reass.h>
+
+typedef enum
+{
+ SNAT_HAIRPIN_SRC_NEXT_DROP,
+ SNAT_HAIRPIN_SRC_NEXT_SNAT_IN2OUT,
+ SNAT_HAIRPIN_SRC_NEXT_SNAT_IN2OUT_WH,
+ SNAT_HAIRPIN_SRC_NEXT_INTERFACE_OUTPUT,
+ SNAT_HAIRPIN_SRC_N_NEXT,
+} snat_hairpin_src_next_t;
+
+typedef enum
+{
+ NAT_HAIRPIN_NEXT_LOOKUP,
+ NAT_HAIRPIN_NEXT_DROP,
+ NAT_HAIRPIN_N_NEXT,
+} nat_hairpin_next_t;
+
+#define foreach_nat44_hairpin_error \
+_(PROCESSED, "NAT44 hairpinning packets processed")
+
+typedef enum
+{
+#define _(sym,str) NAT44_HAIRPIN_ERROR_##sym,
+ foreach_nat44_hairpin_error
+#undef _
+ NAT44_HAIRPIN_N_ERROR,
+} nat44_hairpin_error_t;
+
+static char *nat44_hairpin_error_strings[] = {
+#define _(sym,string) string,
+ foreach_nat44_hairpin_error
+#undef _
+};
+
+vlib_node_registration_t snat_hairpin_dst_node;
+vlib_node_registration_t snat_hairpin_src_node;
+vlib_node_registration_t nat44_hairpinning_node;
+vlib_node_registration_t nat44_ed_hairpin_dst_node;
+vlib_node_registration_t nat44_ed_hairpin_src_node;
+vlib_node_registration_t nat44_ed_hairpinning_node;
+
+extern vnet_feature_arc_registration_t vnet_feat_arc_ip4_local;
+
+static_always_inline int
+is_hairpinning (snat_main_t * sm, ip4_address_t * dst_addr)
+{
+ snat_address_t *ap;
+ clib_bihash_kv_8_8_t kv, value;
+ snat_session_key_t m_key;
+
+ /* *INDENT-OFF* */
+ vec_foreach (ap, sm->addresses)
+ {
+ if (ap->addr.as_u32 == dst_addr->as_u32)
+ return 1;
+ }
+ /* *INDENT-ON* */
+
+ m_key.addr.as_u32 = dst_addr->as_u32;
+ m_key.fib_index = 0;
+ m_key.port = 0;
+ m_key.protocol = 0;
+ kv.key = m_key.as_u64;
+ if (!clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value))
+ return 1;
+
+ return 0;
+}
+
+int
+snat_hairpinning (snat_main_t * sm,
+ vlib_buffer_t * b0,
+ ip4_header_t * ip0,
+ udp_header_t * udp0,
+ tcp_header_t * tcp0, u32 proto0, int is_ed)
+{
+ snat_session_key_t key0, sm0;
+ snat_session_t *s0;
+ clib_bihash_kv_8_8_t kv0, value0;
+ ip_csum_t sum0;
+ u32 new_dst_addr0 = 0, old_dst_addr0, ti = 0, si;
+ u16 new_dst_port0, old_dst_port0;
+ int rv;
+
+ key0.addr = ip0->dst_address;
+ key0.port = udp0->dst_port;
+ key0.protocol = proto0;
+ key0.fib_index = sm->outside_fib_index;
+ kv0.key = key0.as_u64;
+
+ /* Check if destination is static mappings */
+ if (!snat_static_mapping_match (sm, key0, &sm0, 1, 0, 0, 0, 0))
+ {
+ new_dst_addr0 = sm0.addr.as_u32;
+ new_dst_port0 = sm0.port;
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = sm0.fib_index;
+ }
+ /* or active session */
+ else
+ {
+ if (sm->num_workers > 1)
+ ti =
+ (clib_net_to_host_u16 (udp0->dst_port) -
+ 1024) / sm->port_per_thread;
+ else
+ ti = sm->num_workers;
+
+ if (is_ed)
+ {
+ clib_bihash_kv_16_8_t ed_kv, ed_value;
+ make_ed_kv (&ed_kv, &ip0->dst_address, &ip0->src_address,
+ ip0->protocol, sm->outside_fib_index, udp0->dst_port,
+ udp0->src_port);
+ rv = clib_bihash_search_16_8 (&sm->per_thread_data[ti].out2in_ed,
+ &ed_kv, &ed_value);
+ si = ed_value.value;
+ }
+ else
+ {
+ rv = clib_bihash_search_8_8 (&sm->per_thread_data[ti].out2in, &kv0,
+ &value0);
+ si = value0.value;
+ }
+ if (rv)
+ return 0;
+
+ s0 = pool_elt_at_index (sm->per_thread_data[ti].sessions, si);
+ new_dst_addr0 = s0->in2out.addr.as_u32;
+ new_dst_port0 = s0->in2out.port;
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index;
+ }
+
+ /* Destination is behind the same NAT, use internal address and port */
+ if (new_dst_addr0)
+ {
+ old_dst_addr0 = ip0->dst_address.as_u32;
+ ip0->dst_address.as_u32 = new_dst_addr0;
+ sum0 = ip0->checksum;
+ sum0 = ip_csum_update (sum0, old_dst_addr0, new_dst_addr0,
+ ip4_header_t, dst_address);
+ ip0->checksum = ip_csum_fold (sum0);
+
+ old_dst_port0 = tcp0->dst;
+ if (PREDICT_TRUE (new_dst_port0 != old_dst_port0))
+ {
+ if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
+ {
+ tcp0->dst = new_dst_port0;
+ sum0 = tcp0->checksum;
+ sum0 = ip_csum_update (sum0, old_dst_addr0, new_dst_addr0,
+ ip4_header_t, dst_address);
+ sum0 = ip_csum_update (sum0, old_dst_port0, new_dst_port0,
+ ip4_header_t /* cheat */ , length);
+ tcp0->checksum = ip_csum_fold (sum0);
+ }
+ else
+ {
+ udp0->dst_port = new_dst_port0;
+ udp0->checksum = 0;
+ }
+ }
+ else
+ {
+ if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
+ {
+ sum0 = tcp0->checksum;
+ sum0 = ip_csum_update (sum0, old_dst_addr0, new_dst_addr0,
+ ip4_header_t, dst_address);
+ tcp0->checksum = ip_csum_fold (sum0);
+ }
+ }
+ return 1;
+ }
+ return 0;
+}
+
+u32
+snat_icmp_hairpinning (snat_main_t * sm,
+ vlib_buffer_t * b0,
+ ip4_header_t * ip0, icmp46_header_t * icmp0, int is_ed)
+{
+ snat_session_key_t key0;
+ clib_bihash_kv_8_8_t kv0, value0;
+ u32 old_dst_addr0, new_dst_addr0;
+ u32 old_addr0, new_addr0;
+ u16 old_port0, new_port0;
+ u16 old_checksum0, new_checksum0;
+ u32 si, ti = 0;
+ ip_csum_t sum0;
+ snat_session_t *s0;
+ snat_static_mapping_t *m0;
+
+ if (icmp_is_error_message (icmp0))
+ {
+ ip4_header_t *inner_ip0 = 0;
+ tcp_udp_header_t *l4_header = 0;
+
+ inner_ip0 = (ip4_header_t *) ((icmp_echo_header_t *) (icmp0 + 1) + 1);
+ l4_header = ip4_next_header (inner_ip0);
+ u32 protocol = ip_proto_to_snat_proto (inner_ip0->protocol);
+
+ if (protocol != SNAT_PROTOCOL_TCP && protocol != SNAT_PROTOCOL_UDP)
+ return 1;
+
+ if (is_ed)
+ {
+ clib_bihash_kv_16_8_t ed_kv, ed_value;
+ make_ed_kv (&ed_kv, &ip0->dst_address, &ip0->src_address,
+ inner_ip0->protocol, sm->outside_fib_index,
+ l4_header->src_port, l4_header->dst_port);
+ if (clib_bihash_search_16_8 (&sm->per_thread_data[ti].out2in_ed,
+ &ed_kv, &ed_value))
+ return 1;
+ si = ed_value.value;
+ }
+ else
+ {
+ key0.addr = ip0->dst_address;
+ key0.port = l4_header->src_port;
+ key0.protocol = protocol;
+ key0.fib_index = sm->outside_fib_index;
+ kv0.key = key0.as_u64;
+ if (clib_bihash_search_8_8 (&sm->per_thread_data[ti].out2in, &kv0,
+ &value0))
+ return 1;
+ si = value0.value;
+ }
+ s0 = pool_elt_at_index (sm->per_thread_data[ti].sessions, si);
+ new_dst_addr0 = s0->in2out.addr.as_u32;
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index;
+
+ /* update inner source IP address */
+ old_addr0 = inner_ip0->src_address.as_u32;
+ inner_ip0->src_address.as_u32 = new_dst_addr0;
+ new_addr0 = inner_ip0->src_address.as_u32;
+ sum0 = icmp0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
+ src_address);
+ icmp0->checksum = ip_csum_fold (sum0);
+
+ /* update inner IP header checksum */
+ old_checksum0 = inner_ip0->checksum;
+ sum0 = inner_ip0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
+ src_address);
+ inner_ip0->checksum = ip_csum_fold (sum0);
+ new_checksum0 = inner_ip0->checksum;
+ sum0 = icmp0->checksum;
+ sum0 = ip_csum_update (sum0, old_checksum0, new_checksum0, ip4_header_t,
+ checksum);
+ icmp0->checksum = ip_csum_fold (sum0);
+
+ /* update inner source port */
+ old_port0 = l4_header->src_port;
+ l4_header->src_port = s0->in2out.port;
+ new_port0 = l4_header->src_port;
+ sum0 = icmp0->checksum;
+ sum0 = ip_csum_update (sum0, old_port0, new_port0, tcp_udp_header_t,
+ src_port);
+ icmp0->checksum = ip_csum_fold (sum0);
+ }
+ else
+ {
+ if (!is_ed)
+ {
+ icmp_echo_header_t *echo0 = (icmp_echo_header_t *) (icmp0 + 1);
+ u16 icmp_id0 = echo0->identifier;
+ key0.addr = ip0->dst_address;
+ key0.port = icmp_id0;
+ key0.protocol = SNAT_PROTOCOL_ICMP;
+ key0.fib_index = sm->outside_fib_index;
+ kv0.key = key0.as_u64;
+ if (sm->num_workers > 1)
+ ti =
+ (clib_net_to_host_u16 (icmp_id0) - 1024) / sm->port_per_thread;
+ else
+ ti = sm->num_workers;
+ int rv =
+ clib_bihash_search_8_8 (&sm->per_thread_data[ti].out2in, &kv0,
+ &value0);
+ if (!rv)
+ {
+ si = value0.value;
+ s0 = pool_elt_at_index (sm->per_thread_data[ti].sessions, si);
+ new_dst_addr0 = s0->in2out.addr.as_u32;
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index;
+ echo0->identifier = s0->in2out.port;
+ sum0 = icmp0->checksum;
+ sum0 = ip_csum_update (sum0, icmp_id0, s0->in2out.port,
+ icmp_echo_header_t, identifier);
+ icmp0->checksum = ip_csum_fold (sum0);
+ goto change_addr;
+ }
+ ti = 0;
+ }
+
+ key0.addr = ip0->dst_address;
+ key0.port = 0;
+ key0.protocol = 0;
+ key0.fib_index = sm->outside_fib_index;
+ kv0.key = key0.as_u64;
+
+ if (clib_bihash_search_8_8
+ (&sm->static_mapping_by_external, &kv0, &value0))
+ return 1;
+
+ m0 = pool_elt_at_index (sm->static_mappings, value0.value);
+
+ new_dst_addr0 = m0->local_addr.as_u32;
+ if (vnet_buffer (b0)->sw_if_index[VLIB_TX] == ~0)
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = m0->fib_index;
+ }
+change_addr:
+ /* Destination is behind the same NAT, use internal address and port */
+ if (new_dst_addr0)
+ {
+ old_dst_addr0 = ip0->dst_address.as_u32;
+ ip0->dst_address.as_u32 = new_dst_addr0;
+ sum0 = ip0->checksum;
+ sum0 = ip_csum_update (sum0, old_dst_addr0, new_dst_addr0,
+ ip4_header_t, dst_address);
+ ip0->checksum = ip_csum_fold (sum0);
+ }
+ return 0;
+}
+
+void
+nat_hairpinning_sm_unknown_proto (snat_main_t * sm,
+ vlib_buffer_t * b, ip4_header_t * ip)
+{
+ clib_bihash_kv_8_8_t kv, value;
+ snat_static_mapping_t *m;
+ u32 old_addr, new_addr;
+ ip_csum_t sum;
+
+ make_sm_kv (&kv, &ip->dst_address, 0, 0, 0);
+ if (clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value))
+ return;
+
+ m = pool_elt_at_index (sm->static_mappings, value.value);
+
+ old_addr = ip->dst_address.as_u32;
+ new_addr = ip->dst_address.as_u32 = m->local_addr.as_u32;
+ sum = ip->checksum;
+ sum = ip_csum_update (sum, old_addr, new_addr, ip4_header_t, dst_address);
+ ip->checksum = ip_csum_fold (sum);
+
+ if (vnet_buffer (b)->sw_if_index[VLIB_TX] == ~0)
+ vnet_buffer (b)->sw_if_index[VLIB_TX] = m->fib_index;
+}
+
+void
+nat44_ed_hairpinning_unknown_proto (snat_main_t * sm,
+ vlib_buffer_t * b, ip4_header_t * ip)
+{
+ u32 old_addr, new_addr = 0, ti = 0;
+ clib_bihash_kv_8_8_t kv, value;
+ clib_bihash_kv_16_8_t s_kv, s_value;
+ snat_static_mapping_t *m;
+ ip_csum_t sum;
+ snat_session_t *s;
+ snat_main_per_thread_data_t *tsm;
+
+ if (sm->num_workers > 1)
+ ti = sm->worker_out2in_cb (ip, sm->outside_fib_index);
+ else
+ ti = sm->num_workers;
+ tsm = &sm->per_thread_data[ti];
+
+ old_addr = ip->dst_address.as_u32;
+ make_ed_kv (&s_kv, &ip->dst_address, &ip->src_address, ip->protocol,
+ sm->outside_fib_index, 0, 0);
+ if (clib_bihash_search_16_8 (&tsm->out2in_ed, &s_kv, &s_value))
+ {
+ make_sm_kv (&kv, &ip->dst_address, 0, 0, 0);
+ if (clib_bihash_search_8_8
+ (&sm->static_mapping_by_external, &kv, &value))
+ return;
+
+ m = pool_elt_at_index (sm->static_mappings, value.value);
+ if (vnet_buffer (b)->sw_if_index[VLIB_TX] == ~0)
+ vnet_buffer (b)->sw_if_index[VLIB_TX] = m->fib_index;
+ new_addr = ip->dst_address.as_u32 = m->local_addr.as_u32;
+ }
+ else
+ {
+ s = pool_elt_at_index (sm->per_thread_data[ti].sessions, s_value.value);
+ if (vnet_buffer (b)->sw_if_index[VLIB_TX] == ~0)
+ vnet_buffer (b)->sw_if_index[VLIB_TX] = s->in2out.fib_index;
+ new_addr = ip->dst_address.as_u32 = s->in2out.addr.as_u32;
+ }
+ sum = ip->checksum;
+ sum = ip_csum_update (sum, old_addr, new_addr, ip4_header_t, dst_address);
+ ip->checksum = ip_csum_fold (sum);
+}
+
+void
+nat44_reass_hairpinning (snat_main_t * sm,
+ vlib_buffer_t * b0,
+ ip4_header_t * ip0,
+ u16 sport, u16 dport, u32 proto0, int is_ed)
+{
+ snat_session_key_t key0, sm0;
+ snat_session_t *s0;
+ clib_bihash_kv_8_8_t kv0, value0;
+ ip_csum_t sum0;
+ u32 new_dst_addr0 = 0, old_dst_addr0, ti = 0, si;
+ u16 new_dst_port0, old_dst_port0;
+ udp_header_t *udp0;
+ tcp_header_t *tcp0;
+ int rv;
+
+ key0.addr = ip0->dst_address;
+ key0.port = dport;
+ key0.protocol = proto0;
+ key0.fib_index = sm->outside_fib_index;
+ kv0.key = key0.as_u64;
+
+ udp0 = ip4_next_header (ip0);
+
+ /* Check if destination is static mappings */
+ if (!snat_static_mapping_match (sm, key0, &sm0, 1, 0, 0, 0, 0))
+ {
+ new_dst_addr0 = sm0.addr.as_u32;
+ new_dst_port0 = sm0.port;
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = sm0.fib_index;
+ }
+ /* or active sessions */
+ else
+ {
+ if (sm->num_workers > 1)
+ ti =
+ (clib_net_to_host_u16 (udp0->dst_port) -
+ 1024) / sm->port_per_thread;
+ else
+ ti = sm->num_workers;
+
+ if (is_ed)
+ {
+ clib_bihash_kv_16_8_t ed_kv, ed_value;
+ make_ed_kv (&ed_kv, &ip0->dst_address, &ip0->src_address,
+ ip0->protocol, sm->outside_fib_index, udp0->dst_port,
+ udp0->src_port);
+ rv = clib_bihash_search_16_8 (&sm->per_thread_data[ti].out2in_ed,
+ &ed_kv, &ed_value);
+ si = ed_value.value;
+ }
+ else
+ {
+ rv = clib_bihash_search_8_8 (&sm->per_thread_data[ti].out2in, &kv0,
+ &value0);
+ si = value0.value;
+ }
+ if (!rv)
+ {
+ s0 = pool_elt_at_index (sm->per_thread_data[ti].sessions, si);
+ new_dst_addr0 = s0->in2out.addr.as_u32;
+ new_dst_port0 = s0->in2out.port;
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index;
+ }
+ }
+
+ /* Destination is behind the same NAT, use internal address and port */
+ if (new_dst_addr0)
+ {
+ old_dst_addr0 = ip0->dst_address.as_u32;
+ ip0->dst_address.as_u32 = new_dst_addr0;
+ sum0 = ip0->checksum;
+ sum0 = ip_csum_update (sum0, old_dst_addr0, new_dst_addr0,
+ ip4_header_t, dst_address);
+ ip0->checksum = ip_csum_fold (sum0);
+
+ old_dst_port0 = dport;
+ if (PREDICT_TRUE (new_dst_port0 != old_dst_port0 &&
+ ip4_is_first_fragment (ip0)))
+ {
+ if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
+ {
+ tcp0 = ip4_next_header (ip0);
+ tcp0->dst = new_dst_port0;
+ sum0 = tcp0->checksum;
+ sum0 = ip_csum_update (sum0, old_dst_addr0, new_dst_addr0,
+ ip4_header_t, dst_address);
+ sum0 = ip_csum_update (sum0, old_dst_port0, new_dst_port0,
+ ip4_header_t /* cheat */ , length);
+ tcp0->checksum = ip_csum_fold (sum0);
+ }
+ else
+ {
+ udp0->dst_port = new_dst_port0;
+ udp0->checksum = 0;
+ }
+ }
+ else
+ {
+ if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
+ {
+ tcp0 = ip4_next_header (ip0);
+ sum0 = tcp0->checksum;
+ sum0 = ip_csum_update (sum0, old_dst_addr0, new_dst_addr0,
+ ip4_header_t, dst_address);
+ tcp0->checksum = ip_csum_fold (sum0);
+ }
+ }
+ }
+}
+
+static inline uword
+nat44_hairpinning_fn_inline (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame, int is_ed)
+{
+ u32 n_left_from, *from, *to_next, stats_node_index;
+ nat_hairpin_next_t next_index;
+ u32 pkts_processed = 0;
+ snat_main_t *sm = &snat_main;
+ vnet_feature_main_t *fm = &feature_main;
+ u8 arc_index = vnet_feat_arc_ip4_local.feature_arc_index;
+ vnet_feature_config_main_t *cm = &fm->feature_config_mains[arc_index];
+
+ stats_node_index = is_ed ? nat44_ed_hairpinning_node.index :
+ nat44_hairpinning_node.index;
+ from = vlib_frame_vector_args (frame);
+ n_left_from = frame->n_vectors;
+ next_index = node->cached_next_index;
+
+ while (n_left_from > 0)
+ {
+ u32 n_left_to_next;
+
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+ while (n_left_from > 0 && n_left_to_next > 0)
+ {
+ u32 bi0;
+ vlib_buffer_t *b0;
+ u32 next0;
+ ip4_header_t *ip0;
+ u32 proto0;
+ udp_header_t *udp0;
+ tcp_header_t *tcp0;
+
+ /* speculatively enqueue b0 to the current next frame */
+ bi0 = from[0];
+ to_next[0] = bi0;
+ from += 1;
+ to_next += 1;
+ n_left_from -= 1;
+ n_left_to_next -= 1;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ ip0 = vlib_buffer_get_current (b0);
+ udp0 = ip4_next_header (ip0);
+ tcp0 = (tcp_header_t *) udp0;
+
+ proto0 = ip_proto_to_snat_proto (ip0->protocol);
+
+ vnet_get_config_data (&cm->config_main, &b0->current_config_index,
+ &next0, 0);
+
+ if (snat_hairpinning (sm, b0, ip0, udp0, tcp0, proto0, is_ed))
+ next0 = NAT_HAIRPIN_NEXT_LOOKUP;
+
+ pkts_processed += next0 != NAT_HAIRPIN_NEXT_DROP;
+
+ /* verify speculative enqueue, maybe switch current next frame */
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
+ to_next, n_left_to_next,
+ bi0, next0);
+ }
+
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
+
+ vlib_node_increment_counter (vm, stats_node_index,
+ NAT44_HAIRPIN_ERROR_PROCESSED, pkts_processed);
+ return frame->n_vectors;
+}
+
+static uword
+nat44_hairpinning_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+ return nat44_hairpinning_fn_inline (vm, node, frame, 0);
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (nat44_hairpinning_node) = {
+ .function = nat44_hairpinning_fn,
+ .name = "nat44-hairpinning",
+ .vector_size = sizeof (u32),
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .n_errors = ARRAY_LEN(nat44_hairpin_error_strings),
+ .error_strings = nat44_hairpin_error_strings,
+ .n_next_nodes = NAT_HAIRPIN_N_NEXT,
+ .next_nodes = {
+ [NAT_HAIRPIN_NEXT_DROP] = "error-drop",
+ [NAT_HAIRPIN_NEXT_LOOKUP] = "ip4-lookup",
+ },
+};
+/* *INDENT-ON* */
+
+VLIB_NODE_FUNCTION_MULTIARCH (nat44_hairpinning_node, nat44_hairpinning_fn);
+
+static uword
+nat44_ed_hairpinning_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+ return nat44_hairpinning_fn_inline (vm, node, frame, 1);
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (nat44_ed_hairpinning_node) = {
+ .function = nat44_ed_hairpinning_fn,
+ .name = "nat44-ed-hairpinning",
+ .vector_size = sizeof (u32),
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .n_errors = ARRAY_LEN(nat44_hairpin_error_strings),
+ .error_strings = nat44_hairpin_error_strings,
+ .n_next_nodes = NAT_HAIRPIN_N_NEXT,
+ .next_nodes = {
+ [NAT_HAIRPIN_NEXT_DROP] = "error-drop",
+ [NAT_HAIRPIN_NEXT_LOOKUP] = "ip4-lookup",
+ },
+};
+/* *INDENT-ON* */
+
+VLIB_NODE_FUNCTION_MULTIARCH (nat44_ed_hairpinning_node,
+ nat44_ed_hairpinning_fn);
+
+static inline uword
+snat_hairpin_dst_fn_inline (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame, int is_ed)
+{
+ u32 n_left_from, *from, *to_next, stats_node_index;
+ nat_hairpin_next_t next_index;
+ u32 pkts_processed = 0;
+ snat_main_t *sm = &snat_main;
+
+ stats_node_index = is_ed ? nat44_ed_hairpin_dst_node.index :
+ snat_hairpin_dst_node.index;
+
+ from = vlib_frame_vector_args (frame);
+ n_left_from = frame->n_vectors;
+ next_index = node->cached_next_index;
+
+ while (n_left_from > 0)
+ {
+ u32 n_left_to_next;
+
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+ while (n_left_from > 0 && n_left_to_next > 0)
+ {
+ u32 bi0;
+ vlib_buffer_t *b0;
+ u32 next0;
+ ip4_header_t *ip0;
+ u32 proto0;
+
+ /* speculatively enqueue b0 to the current next frame */
+ bi0 = from[0];
+ to_next[0] = bi0;
+ from += 1;
+ to_next += 1;
+ n_left_from -= 1;
+ n_left_to_next -= 1;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ next0 = NAT_HAIRPIN_NEXT_LOOKUP;
+ ip0 = vlib_buffer_get_current (b0);
+
+ proto0 = ip_proto_to_snat_proto (ip0->protocol);
+
+ vnet_buffer (b0)->snat.flags = 0;
+ if (PREDICT_FALSE (is_hairpinning (sm, &ip0->dst_address)))
+ {
+ if (proto0 == SNAT_PROTOCOL_TCP || proto0 == SNAT_PROTOCOL_UDP)
+ {
+ udp_header_t *udp0 = ip4_next_header (ip0);
+ tcp_header_t *tcp0 = (tcp_header_t *) udp0;
+
+ snat_hairpinning (sm, b0, ip0, udp0, tcp0, proto0, is_ed);
+ }
+ else if (proto0 == SNAT_PROTOCOL_ICMP)
+ {
+ icmp46_header_t *icmp0 = ip4_next_header (ip0);
+
+ snat_icmp_hairpinning (sm, b0, ip0, icmp0, is_ed);
+ }
+ else
+ {
+ if (is_ed)
+ nat44_ed_hairpinning_unknown_proto (sm, b0, ip0);
+ else
+ nat_hairpinning_sm_unknown_proto (sm, b0, ip0);
+ }
+
+ vnet_buffer (b0)->snat.flags = SNAT_FLAG_HAIRPINNING;
+ }
+
+ pkts_processed += next0 != NAT_HAIRPIN_NEXT_DROP;
+
+ /* verify speculative enqueue, maybe switch current next frame */
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
+ to_next, n_left_to_next,
+ bi0, next0);
+ }
+
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
+
+ vlib_node_increment_counter (vm, stats_node_index,
+ NAT44_HAIRPIN_ERROR_PROCESSED, pkts_processed);
+ return frame->n_vectors;
+}
+
+static uword
+snat_hairpin_dst_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+ return snat_hairpin_dst_fn_inline (vm, node, frame, 0);
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (snat_hairpin_dst_node) = {
+ .function = snat_hairpin_dst_fn,
+ .name = "nat44-hairpin-dst",
+ .vector_size = sizeof (u32),
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .n_errors = ARRAY_LEN(nat44_hairpin_error_strings),
+ .error_strings = nat44_hairpin_error_strings,
+ .n_next_nodes = NAT_HAIRPIN_N_NEXT,
+ .next_nodes = {
+ [NAT_HAIRPIN_NEXT_DROP] = "error-drop",
+ [NAT_HAIRPIN_NEXT_LOOKUP] = "ip4-lookup",
+ },
+};
+/* *INDENT-ON* */
+
+VLIB_NODE_FUNCTION_MULTIARCH (snat_hairpin_dst_node, snat_hairpin_dst_fn);
+
+static uword
+nat44_ed_hairpin_dst_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+ return snat_hairpin_dst_fn_inline (vm, node, frame, 1);
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (nat44_ed_hairpin_dst_node) = {
+ .function = nat44_ed_hairpin_dst_fn,
+ .name = "nat44-ed-hairpin-dst",
+ .vector_size = sizeof (u32),
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .n_errors = ARRAY_LEN(nat44_hairpin_error_strings),
+ .error_strings = nat44_hairpin_error_strings,
+ .n_next_nodes = NAT_HAIRPIN_N_NEXT,
+ .next_nodes = {
+ [NAT_HAIRPIN_NEXT_DROP] = "error-drop",
+ [NAT_HAIRPIN_NEXT_LOOKUP] = "ip4-lookup",
+ },
+};
+/* *INDENT-ON* */
+
+VLIB_NODE_FUNCTION_MULTIARCH (nat44_ed_hairpin_dst_node,
+ nat44_ed_hairpin_dst_fn);
+
+static inline uword
+snat_hairpin_src_fn_inline (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame, int is_ed)
+{
+ u32 n_left_from, *from, *to_next, stats_node_index;
+ snat_hairpin_src_next_t next_index;
+ u32 pkts_processed = 0;
+ snat_main_t *sm = &snat_main;
+
+ stats_node_index = is_ed ? nat44_ed_hairpin_src_node.index :
+ snat_hairpin_src_node.index;
+
+ from = vlib_frame_vector_args (frame);
+ n_left_from = frame->n_vectors;
+ next_index = node->cached_next_index;
+
+ while (n_left_from > 0)
+ {
+ u32 n_left_to_next;
+
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+ while (n_left_from > 0 && n_left_to_next > 0)
+ {
+ u32 bi0;
+ vlib_buffer_t *b0;
+ u32 next0;
+ snat_interface_t *i;
+ u32 sw_if_index0;
+
+ /* speculatively enqueue b0 to the current next frame */
+ bi0 = from[0];
+ to_next[0] = bi0;
+ from += 1;
+ to_next += 1;
+ n_left_from -= 1;
+ n_left_to_next -= 1;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+ next0 = SNAT_HAIRPIN_SRC_NEXT_INTERFACE_OUTPUT;
+
+ /* *INDENT-OFF* */
+ pool_foreach (i, sm->output_feature_interfaces,
+ ({
+ /* Only packets from NAT inside interface */
+ if ((nat_interface_is_inside(i)) && (sw_if_index0 == i->sw_if_index))
+ {
+ if (PREDICT_FALSE ((vnet_buffer (b0)->snat.flags) &
+ SNAT_FLAG_HAIRPINNING))
+ {
+ if (PREDICT_TRUE (sm->num_workers > 1))
+ next0 = SNAT_HAIRPIN_SRC_NEXT_SNAT_IN2OUT_WH;
+ else
+ next0 = SNAT_HAIRPIN_SRC_NEXT_SNAT_IN2OUT;
+ }
+ break;
+ }
+ }));
+ /* *INDENT-ON* */
+
+ pkts_processed += next0 != SNAT_HAIRPIN_SRC_NEXT_DROP;
+
+ /* verify speculative enqueue, maybe switch current next frame */
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
+ to_next, n_left_to_next,
+ bi0, next0);
+ }
+
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
+
+ vlib_node_increment_counter (vm, stats_node_index,
+ NAT44_HAIRPIN_ERROR_PROCESSED, pkts_processed);
+ return frame->n_vectors;
+}
+
+static uword
+snat_hairpin_src_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+ return snat_hairpin_src_fn_inline (vm, node, frame, 0);
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (snat_hairpin_src_node) = {
+ .function = snat_hairpin_src_fn,
+ .name = "nat44-hairpin-src",
+ .vector_size = sizeof (u32),
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .n_errors = ARRAY_LEN(nat44_hairpin_error_strings),
+ .error_strings = nat44_hairpin_error_strings,
+ .n_next_nodes = SNAT_HAIRPIN_SRC_N_NEXT,
+ .next_nodes = {
+ [SNAT_HAIRPIN_SRC_NEXT_DROP] = "error-drop",
+ [SNAT_HAIRPIN_SRC_NEXT_SNAT_IN2OUT] = "nat44-in2out-output",
+ [SNAT_HAIRPIN_SRC_NEXT_INTERFACE_OUTPUT] = "interface-output",
+ [SNAT_HAIRPIN_SRC_NEXT_SNAT_IN2OUT_WH] = "nat44-in2out-output-worker-handoff",
+ },
+};
+/* *INDENT-ON* */
+
+VLIB_NODE_FUNCTION_MULTIARCH (snat_hairpin_src_node, snat_hairpin_src_fn);
+
+static uword
+nat44_ed_hairpin_src_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+ return snat_hairpin_src_fn_inline (vm, node, frame, 1);
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (nat44_ed_hairpin_src_node) = {
+ .function = nat44_ed_hairpin_src_fn,
+ .name = "nat44-ed-hairpin-src",
+ .vector_size = sizeof (u32),
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .n_errors = ARRAY_LEN(nat44_hairpin_error_strings),
+ .error_strings = nat44_hairpin_error_strings,
+ .n_next_nodes = SNAT_HAIRPIN_SRC_N_NEXT,
+ .next_nodes = {
+ [SNAT_HAIRPIN_SRC_NEXT_DROP] = "error-drop",
+ [SNAT_HAIRPIN_SRC_NEXT_SNAT_IN2OUT] = "nat44-ed-in2out-output",
+ [SNAT_HAIRPIN_SRC_NEXT_INTERFACE_OUTPUT] = "interface-output",
+ [SNAT_HAIRPIN_SRC_NEXT_SNAT_IN2OUT_WH] = "nat44-in2out-output-worker-handoff",
+ },
+};
+/* *INDENT-ON* */
+
+VLIB_NODE_FUNCTION_MULTIARCH (nat44_ed_hairpin_src_node,
+ nat44_ed_hairpin_src_fn);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
--- /dev/null
+/*
+ * Copyright (c) 2018 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/**
+ * @file
+ * @brief NAT44 worker handoff
+ */
+
+#include <vlib/vlib.h>
+#include <vnet/vnet.h>
+#include <vnet/handoff.h>
+#include <vnet/fib/ip4_fib.h>
+#include <vppinfra/error.h>
+#include <nat/nat.h>
+
+typedef struct
+{
+ u32 next_worker_index;
+ u8 in2out;
+} nat44_handoff_trace_t;
+
+#define foreach_nat44_handoff_error \
+_(CONGESTION_DROP, "congestion drop")
+
+typedef enum
+{
+#define _(sym,str) NAT44_HANDOFF_ERROR_##sym,
+ foreach_nat44_handoff_error
+#undef _
+ NAT44_HANDOFF_N_ERROR,
+} nat44_handoff_error_t;
+
+static char *nat44_handoff_error_strings[] = {
+#define _(sym,string) string,
+ foreach_nat44_handoff_error
+#undef _
+};
+
+
+vlib_node_registration_t snat_in2out_worker_handoff_node;
+vlib_node_registration_t snat_in2out_output_worker_handoff_node;
+vlib_node_registration_t snat_out2in_worker_handoff_node;
+
+static u8 *
+format_nat44_handoff_trace (u8 * s, va_list * args)
+{
+ CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
+ CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
+ nat44_handoff_trace_t *t = va_arg (*args, nat44_handoff_trace_t *);
+ char *tag;
+
+ tag = t->in2out ? "IN2OUT" : "OUT2IN";
+ s =
+ format (s, "NAT44_%s_WORKER_HANDOFF: next-worker %d", tag,
+ t->next_worker_index);
+
+ return s;
+}
+
+static inline uword
+nat44_worker_handoff_fn_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
+ vlib_frame_t * frame, u8 is_output,
+ u8 is_in2out)
+{
+ snat_main_t *sm = &snat_main;
+ vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
+ u32 n_enq, n_left_from, *from;
+ u16 thread_indices[VLIB_FRAME_SIZE], *ti;
+ u32 fq_index;
+ snat_get_worker_function_t *get_worker;
+
+ from = vlib_frame_vector_args (frame);
+ n_left_from = frame->n_vectors;
+ vlib_get_buffers (vm, from, bufs, n_left_from);
+
+ b = bufs;
+ ti = thread_indices;
+
+ ASSERT (vec_len (sm->workers));
+
+ if (is_in2out)
+ {
+ get_worker = sm->worker_in2out_cb;
+ if (is_output)
+ fq_index = sm->fq_in2out_output_index;
+ else
+ fq_index = sm->fq_in2out_index;
+ }
+ else
+ {
+ fq_index = sm->fq_out2in_index;
+ get_worker = sm->worker_out2in_cb;
+ }
+
+ while (n_left_from > 0)
+ {
+ u32 sw_if_index0;
+ u32 rx_fib_index0;
+ ip4_header_t *ip0;
+
+ sw_if_index0 = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
+ rx_fib_index0 = ip4_fib_table_get_index_for_sw_if_index (sw_if_index0);
+ ip0 = vlib_buffer_get_current (b[0]);
+ ti[0] = get_worker (ip0, rx_fib_index0);
+
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b[0]->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ nat44_handoff_trace_t *t =
+ vlib_add_trace (vm, node, b[0], sizeof (*t));
+ t->next_worker_index = ti[0];
+ t->in2out = is_in2out;
+ }
+
+ n_left_from -= 1;
+ ti += 1;
+ b += 1;
+ }
+
+ n_enq =
+ vlib_buffer_enqueue_to_thread (vm, fq_index, from, thread_indices,
+ frame->n_vectors, 1);
+
+ if (n_enq < frame->n_vectors)
+ vlib_node_increment_counter (vm, node->node_index,
+ NAT44_HANDOFF_ERROR_CONGESTION_DROP,
+ frame->n_vectors - n_enq);
+ return frame->n_vectors;
+}
+
+static uword
+snat_in2out_worker_handoff_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ return nat44_worker_handoff_fn_inline (vm, node, frame, 0, 1);
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (snat_in2out_worker_handoff_node) = {
+ .function = snat_in2out_worker_handoff_fn,
+ .name = "nat44-in2out-worker-handoff",
+ .vector_size = sizeof (u32),
+ .format_trace = format_nat44_handoff_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .n_errors = ARRAY_LEN(nat44_handoff_error_strings),
+ .error_strings = nat44_handoff_error_strings,
+ .n_next_nodes = 1,
+ .next_nodes = {
+ [0] = "error-drop",
+ },
+};
+/* *INDENT-ON* */
+
+VLIB_NODE_FUNCTION_MULTIARCH (snat_in2out_worker_handoff_node,
+ snat_in2out_worker_handoff_fn);
+
+static uword
+snat_in2out_output_worker_handoff_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ return nat44_worker_handoff_fn_inline (vm, node, frame, 1, 1);
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (snat_in2out_output_worker_handoff_node) = {
+ .function = snat_in2out_output_worker_handoff_fn,
+ .name = "nat44-in2out-output-worker-handoff",
+ .vector_size = sizeof (u32),
+ .format_trace = format_nat44_handoff_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .n_errors = ARRAY_LEN(nat44_handoff_error_strings),
+ .error_strings = nat44_handoff_error_strings,
+ .n_next_nodes = 1,
+ .next_nodes = {
+ [0] = "error-drop",
+ },
+};
+/* *INDENT-ON* */
+
+VLIB_NODE_FUNCTION_MULTIARCH (snat_in2out_output_worker_handoff_node,
+ snat_in2out_output_worker_handoff_fn);
+
+static uword
+snat_out2in_worker_handoff_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ return nat44_worker_handoff_fn_inline (vm, node, frame, 0, 0);
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (snat_out2in_worker_handoff_node) = {
+ .function = snat_out2in_worker_handoff_fn,
+ .name = "nat44-out2in-worker-handoff",
+ .vector_size = sizeof (u32),
+ .format_trace = format_nat44_handoff_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .n_errors = ARRAY_LEN(nat44_handoff_error_strings),
+ .error_strings = nat44_handoff_error_strings,
+ .n_next_nodes = 1,
+ .next_nodes = {
+ [0] = "error-drop",
+ },
+};
+/* *INDENT-ON* */
+
+VLIB_NODE_FUNCTION_MULTIARCH (snat_out2in_worker_handoff_node,
+ snat_out2in_worker_handoff_fn);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
nat64_main_t *nm = &nat64_main;
snat_main_t *sm = nm->sm;
snat_session_key_t k;
- u32 ai;
u32 worker_index = 0;
int rv;
worker_index = thread_index - sm->first_worker_index;
rv =
- sm->alloc_addr_and_port (nm->addr_pool, fib_index, thread_index, &k, &ai,
+ sm->alloc_addr_and_port (nm->addr_pool, fib_index, thread_index, &k,
sm->port_per_thread, worker_index);
if (!rv)
VLIB_NODE_FUNCTION_MULTIARCH (nat64_in2out_reass_node,
nat64_in2out_reass_node_fn);
+#define foreach_nat64_in2out_handoff_error \
+_(CONGESTION_DROP, "congestion drop")
+
+typedef enum
+{
+#define _(sym,str) NAT64_IN2OUT_HANDOFF_ERROR_##sym,
+ foreach_nat64_in2out_handoff_error
+#undef _
+ NAT64_IN2OUT_HANDOFF_N_ERROR,
+} nat64_in2out_handoff_error_t;
+
+static char *nat64_in2out_handoff_error_strings[] = {
+#define _(sym,string) string,
+ foreach_nat64_in2out_handoff_error
+#undef _
+};
+
typedef struct
{
u32 next_worker_index;
- u8 do_handoff;
} nat64_in2out_handoff_trace_t;
static u8 *
CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
nat64_in2out_handoff_trace_t *t =
va_arg (*args, nat64_in2out_handoff_trace_t *);
- char *m;
- m = t->do_handoff ? "next worker" : "same worker";
- s = format (s, "NAT64-IN2OUT-HANDOFF: %s %d", m, t->next_worker_index);
+ s =
+ format (s, "NAT64-IN2OUT-HANDOFF: next-worker %d", t->next_worker_index);
return s;
}
vlib_frame_t * frame)
{
nat64_main_t *nm = &nat64_main;
- vlib_thread_main_t *tm = vlib_get_thread_main ();
- u32 n_left_from, *from, *to_next = 0, *to_next_drop = 0;
- static __thread vlib_frame_queue_elt_t **handoff_queue_elt_by_worker_index;
- static __thread vlib_frame_queue_t **congested_handoff_queue_by_worker_index
- = 0;
- vlib_frame_queue_elt_t *hf = 0;
- vlib_frame_queue_t *fq;
- vlib_frame_t *f = 0, *d = 0;
- int i;
- u32 n_left_to_next_worker = 0, *to_next_worker = 0;
- u32 next_worker_index = 0;
- u32 current_worker_index = ~0;
- u32 thread_index = vm->thread_index;
+ vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
+ u32 n_enq, n_left_from, *from;
+ u16 thread_indices[VLIB_FRAME_SIZE], *ti;
u32 fq_index;
- u32 to_node_index;
-
- fq_index = nm->fq_in2out_index;
- to_node_index = nat64_in2out_node.index;
-
- if (PREDICT_FALSE (handoff_queue_elt_by_worker_index == 0))
- {
- vec_validate (handoff_queue_elt_by_worker_index, tm->n_vlib_mains - 1);
-
- vec_validate_init_empty (congested_handoff_queue_by_worker_index,
- tm->n_vlib_mains - 1,
- (vlib_frame_queue_t *) (~0));
- }
from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
+ vlib_get_buffers (vm, from, bufs, n_left_from);
+
+ b = bufs;
+ ti = thread_indices;
+
+ fq_index = nm->fq_in2out_index;
while (n_left_from > 0)
{
- u32 bi0;
- vlib_buffer_t *b0;
ip6_header_t *ip0;
- u8 do_handoff;
-
- bi0 = from[0];
- from += 1;
- n_left_from -= 1;
-
- b0 = vlib_get_buffer (vm, bi0);
-
- ip0 = vlib_buffer_get_current (b0);
-
- next_worker_index = nat64_get_worker_in2out (&ip0->src_address);
-
- if (PREDICT_FALSE (next_worker_index != thread_index))
- {
- do_handoff = 1;
-
- if (next_worker_index != current_worker_index)
- {
- fq =
- is_vlib_frame_queue_congested (fq_index, next_worker_index,
- 30,
- congested_handoff_queue_by_worker_index);
-
- if (fq)
- {
- /* if this is 1st frame */
- if (!d)
- {
- d = vlib_get_frame_to_node (vm, nm->error_node_index);
- to_next_drop = vlib_frame_vector_args (d);
- }
-
- to_next_drop[0] = bi0;
- to_next_drop += 1;
- d->n_vectors++;
- goto trace0;
- }
-
- if (hf)
- hf->n_vectors = VLIB_FRAME_SIZE - n_left_to_next_worker;
-
- hf =
- vlib_get_worker_handoff_queue_elt (fq_index,
- next_worker_index,
- handoff_queue_elt_by_worker_index);
- n_left_to_next_worker = VLIB_FRAME_SIZE - hf->n_vectors;
- to_next_worker = &hf->buffer_index[hf->n_vectors];
- current_worker_index = next_worker_index;
- }
-
- ASSERT (to_next_worker != 0);
-
- /* enqueue to correct worker thread */
- to_next_worker[0] = bi0;
- to_next_worker++;
- n_left_to_next_worker--;
-
- if (n_left_to_next_worker == 0)
- {
- hf->n_vectors = VLIB_FRAME_SIZE;
- vlib_put_frame_queue_elt (hf);
- current_worker_index = ~0;
- handoff_queue_elt_by_worker_index[next_worker_index] = 0;
- hf = 0;
- }
- }
- else
- {
- do_handoff = 0;
- /* if this is 1st frame */
- if (!f)
- {
- f = vlib_get_frame_to_node (vm, to_node_index);
- to_next = vlib_frame_vector_args (f);
- }
- to_next[0] = bi0;
- to_next += 1;
- f->n_vectors++;
- }
+ ip0 = vlib_buffer_get_current (b[0]);
+ ti[0] = nat64_get_worker_in2out (&ip0->src_address);
- trace0:
if (PREDICT_FALSE
((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ && (b[0]->flags & VLIB_BUFFER_IS_TRACED)))
{
nat64_in2out_handoff_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->next_worker_index = next_worker_index;
- t->do_handoff = do_handoff;
+ vlib_add_trace (vm, node, b[0], sizeof (*t));
+ t->next_worker_index = ti[0];
}
- }
- if (f)
- vlib_put_frame_to_node (vm, to_node_index, f);
-
- if (d)
- vlib_put_frame_to_node (vm, nm->error_node_index, d);
+ n_left_from -= 1;
+ ti += 1;
+ b += 1;
+ }
- if (hf)
- hf->n_vectors = VLIB_FRAME_SIZE - n_left_to_next_worker;
+ n_enq =
+ vlib_buffer_enqueue_to_thread (vm, fq_index, from, thread_indices,
+ frame->n_vectors, 1);
- /* Ship frames to the worker nodes */
- for (i = 0; i < vec_len (handoff_queue_elt_by_worker_index); i++)
- {
- if (handoff_queue_elt_by_worker_index[i])
- {
- hf = handoff_queue_elt_by_worker_index[i];
- /*
- * It works better to let the handoff node
- * rate-adapt, always ship the handoff queue element.
- */
- if (1 || hf->n_vectors == hf->last_n_vectors)
- {
- vlib_put_frame_queue_elt (hf);
- handoff_queue_elt_by_worker_index[i] = 0;
- }
- else
- hf->last_n_vectors = hf->n_vectors;
- }
- congested_handoff_queue_by_worker_index[i] =
- (vlib_frame_queue_t *) (~0);
- }
- hf = 0;
- current_worker_index = ~0;
+ if (n_enq < frame->n_vectors)
+ vlib_node_increment_counter (vm, node->node_index,
+ NAT64_IN2OUT_HANDOFF_ERROR_CONGESTION_DROP,
+ frame->n_vectors - n_enq);
return frame->n_vectors;
}
.vector_size = sizeof (u32),
.format_trace = format_nat64_in2out_handoff_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
+ .n_errors = ARRAY_LEN(nat64_in2out_handoff_error_strings),
+ .error_strings = nat64_in2out_handoff_error_strings,
.n_next_nodes = 1,
VLIB_NODE_FUNCTION_MULTIARCH (nat64_out2in_reass_node,
nat64_out2in_reass_node_fn);
+#define foreach_nat64_out2in_handoff_error \
+_(CONGESTION_DROP, "congestion drop")
+
+typedef enum
+{
+#define _(sym,str) NAT64_OUT2IN_HANDOFF_ERROR_##sym,
+ foreach_nat64_out2in_handoff_error
+#undef _
+ NAT64_OUT2IN_HANDOFF_N_ERROR,
+} nat64_out2in_handoff_error_t;
+
+static char *nat64_out2in_handoff_error_strings[] = {
+#define _(sym,string) string,
+ foreach_nat64_out2in_handoff_error
+#undef _
+};
+
typedef struct
{
u32 next_worker_index;
- u8 do_handoff;
} nat64_out2in_handoff_trace_t;
static u8 *
CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
nat64_out2in_handoff_trace_t *t =
va_arg (*args, nat64_out2in_handoff_trace_t *);
- char *m;
- m = t->do_handoff ? "next worker" : "same worker";
- s = format (s, "NAT64-OUT2IN-HANDOFF: %s %d", m, t->next_worker_index);
+ s =
+ format (s, "NAT64-OUT2IN-HANDOFF: next-worker %d", t->next_worker_index);
return s;
}
vlib_frame_t * frame)
{
nat64_main_t *nm = &nat64_main;
- vlib_thread_main_t *tm = vlib_get_thread_main ();
- u32 n_left_from, *from, *to_next = 0, *to_next_drop = 0;
- static __thread vlib_frame_queue_elt_t **handoff_queue_elt_by_worker_index;
- static __thread vlib_frame_queue_t **congested_handoff_queue_by_worker_index
- = 0;
- vlib_frame_queue_elt_t *hf = 0;
- vlib_frame_queue_t *fq;
- vlib_frame_t *f = 0, *d = 0;
- int i;
- u32 n_left_to_next_worker = 0, *to_next_worker = 0;
- u32 next_worker_index = 0;
- u32 current_worker_index = ~0;
- u32 thread_index = vm->thread_index;
+ vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
+ u32 n_enq, n_left_from, *from;
+ u16 thread_indices[VLIB_FRAME_SIZE], *ti;
u32 fq_index;
- u32 to_node_index;
-
- fq_index = nm->fq_out2in_index;
- to_node_index = nat64_out2in_node.index;
-
- if (PREDICT_FALSE (handoff_queue_elt_by_worker_index == 0))
- {
- vec_validate (handoff_queue_elt_by_worker_index, tm->n_vlib_mains - 1);
-
- vec_validate_init_empty (congested_handoff_queue_by_worker_index,
- tm->n_vlib_mains - 1,
- (vlib_frame_queue_t *) (~0));
- }
from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
+ vlib_get_buffers (vm, from, bufs, n_left_from);
+
+ b = bufs;
+ ti = thread_indices;
+
+ fq_index = nm->fq_out2in_index;
while (n_left_from > 0)
{
- u32 bi0;
- vlib_buffer_t *b0;
ip4_header_t *ip0;
- u8 do_handoff;
-
- bi0 = from[0];
- from += 1;
- n_left_from -= 1;
-
- b0 = vlib_get_buffer (vm, bi0);
-
- ip0 = vlib_buffer_get_current (b0);
- next_worker_index = nat64_get_worker_out2in (ip0);
-
- if (PREDICT_FALSE (next_worker_index != thread_index))
- {
- do_handoff = 1;
-
- if (next_worker_index != current_worker_index)
- {
- fq =
- is_vlib_frame_queue_congested (fq_index, next_worker_index,
- 30,
- congested_handoff_queue_by_worker_index);
-
- if (fq)
- {
- /* if this is 1st frame */
- if (!d)
- {
- d = vlib_get_frame_to_node (vm, nm->error_node_index);
- to_next_drop = vlib_frame_vector_args (d);
- }
+ ip0 = vlib_buffer_get_current (b[0]);
+ ti[0] = nat64_get_worker_out2in (ip0);
- to_next_drop[0] = bi0;
- to_next_drop += 1;
- d->n_vectors++;
- goto trace0;
- }
-
- if (hf)
- hf->n_vectors = VLIB_FRAME_SIZE - n_left_to_next_worker;
-
- hf =
- vlib_get_worker_handoff_queue_elt (fq_index,
- next_worker_index,
- handoff_queue_elt_by_worker_index);
- n_left_to_next_worker = VLIB_FRAME_SIZE - hf->n_vectors;
- to_next_worker = &hf->buffer_index[hf->n_vectors];
- current_worker_index = next_worker_index;
- }
-
- ASSERT (to_next_worker != 0);
-
- /* enqueue to correct worker thread */
- to_next_worker[0] = bi0;
- to_next_worker++;
- n_left_to_next_worker--;
-
- if (n_left_to_next_worker == 0)
- {
- hf->n_vectors = VLIB_FRAME_SIZE;
- vlib_put_frame_queue_elt (hf);
- current_worker_index = ~0;
- handoff_queue_elt_by_worker_index[next_worker_index] = 0;
- hf = 0;
- }
- }
- else
- {
- do_handoff = 0;
- /* if this is 1st frame */
- if (!f)
- {
- f = vlib_get_frame_to_node (vm, to_node_index);
- to_next = vlib_frame_vector_args (f);
- }
-
- to_next[0] = bi0;
- to_next += 1;
- f->n_vectors++;
- }
-
- trace0:
if (PREDICT_FALSE
((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ && (b[0]->flags & VLIB_BUFFER_IS_TRACED)))
{
nat64_out2in_handoff_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->next_worker_index = next_worker_index;
- t->do_handoff = do_handoff;
+ vlib_add_trace (vm, node, b[0], sizeof (*t));
+ t->next_worker_index = ti[0];
}
- }
-
- if (f)
- vlib_put_frame_to_node (vm, to_node_index, f);
- if (d)
- vlib_put_frame_to_node (vm, nm->error_node_index, d);
+ n_left_from -= 1;
+ ti += 1;
+ b += 1;
+ }
- if (hf)
- hf->n_vectors = VLIB_FRAME_SIZE - n_left_to_next_worker;
+ n_enq =
+ vlib_buffer_enqueue_to_thread (vm, fq_index, from, thread_indices,
+ frame->n_vectors, 1);
- /* Ship frames to the worker nodes */
- for (i = 0; i < vec_len (handoff_queue_elt_by_worker_index); i++)
- {
- if (handoff_queue_elt_by_worker_index[i])
- {
- hf = handoff_queue_elt_by_worker_index[i];
- /*
- * It works better to let the handoff node
- * rate-adapt, always ship the handoff queue element.
- */
- if (1 || hf->n_vectors == hf->last_n_vectors)
- {
- vlib_put_frame_queue_elt (hf);
- handoff_queue_elt_by_worker_index[i] = 0;
- }
- else
- hf->last_n_vectors = hf->n_vectors;
- }
- congested_handoff_queue_by_worker_index[i] =
- (vlib_frame_queue_t *) (~0);
- }
- hf = 0;
- current_worker_index = ~0;
+ if (n_enq < frame->n_vectors)
+ vlib_node_increment_counter (vm, node->node_index,
+ NAT64_OUT2IN_HANDOFF_ERROR_CONGESTION_DROP,
+ frame->n_vectors - n_enq);
return frame->n_vectors;
}
.vector_size = sizeof (u32),
.format_trace = format_nat64_out2in_handoff_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
+ .n_errors = ARRAY_LEN(nat64_out2in_handoff_error_strings),
+ .error_strings = nat64_out2in_handoff_error_strings,
.n_next_nodes = 1,
--- /dev/null
+/*
+ * Copyright (c) 2018 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/**
+ * @file
+ * @brief Deterministic/CGN NAT44 inside to outside network translation
+ */
+
+#include <vlib/vlib.h>
+#include <vnet/vnet.h>
+#include <vnet/ip/ip.h>
+#include <vnet/fib/ip4_fib.h>
+#include <vppinfra/error.h>
+#include <vppinfra/elog.h>
+#include <nat/nat.h>
+#include <nat/nat_det.h>
+#include <nat/nat_inlines.h>
+
+typedef struct
+{
+ u32 sw_if_index;
+ u32 next_index;
+ u32 session_index;
+} nat_det_in2out_trace_t;
+
+typedef enum
+{
+ NAT_DET_IN2OUT_NEXT_LOOKUP,
+ NAT_DET_IN2OUT_NEXT_DROP,
+ NAT_DET_IN2OUT_NEXT_ICMP_ERROR,
+ NAT_DET_IN2OUT_N_NEXT,
+} nat_det_in2out_next_t;
+
+#define foreach_nat_det_in2out_error \
+_(UNSUPPORTED_PROTOCOL, "Unsupported protocol") \
+_(NO_TRANSLATION, "No translation") \
+_(BAD_ICMP_TYPE, "unsupported ICMP type") \
+_(OUT_OF_PORTS, "Out of ports") \
+_(IN2OUT_PACKETS, "Good in2out packets processed")
+
+typedef enum
+{
+#define _(sym,str) NAT_DET_IN2OUT_ERROR_##sym,
+ foreach_nat_det_in2out_error
+#undef _
+ NAT_DET_IN2OUT_N_ERROR,
+} nat_det_in2out_error_t;
+
+static char *nat_det_in2out_error_strings[] = {
+#define _(sym,string) string,
+ foreach_nat_det_in2out_error
+#undef _
+};
+
+vlib_node_registration_t snat_det_in2out_node;
+
+static u8 *
+format_nat_det_in2out_trace (u8 * s, va_list * args)
+{
+ CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
+ CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
+ nat_det_in2out_trace_t *t = va_arg (*args, nat_det_in2out_trace_t *);
+
+ s = format (s, "NAT_DET_IN2OUT: sw_if_index %d, next index %d, session %d",
+ t->sw_if_index, t->next_index, t->session_index);
+
+ return s;
+}
+
+/**
+ * Get address and port values to be used for ICMP packet translation
+ * and create session if needed
+ *
+ * @param[in,out] sm NAT main
+ * @param[in,out] node NAT node runtime
+ * @param[in] thread_index thread index
+ * @param[in,out] b0 buffer containing packet to be translated
+ * @param[out] p_proto protocol used for matching
+ * @param[out] p_value address and port after NAT translation
+ * @param[out] p_dont_translate if packet should not be translated
+ * @param d optional parameter
+ * @param e optional parameter
+ */
+u32
+icmp_match_in2out_det (snat_main_t * sm, vlib_node_runtime_t * node,
+ u32 thread_index, vlib_buffer_t * b0,
+ ip4_header_t * ip0, u8 * p_proto,
+ snat_session_key_t * p_value,
+ u8 * p_dont_translate, void *d, void *e)
+{
+ icmp46_header_t *icmp0;
+ u32 sw_if_index0;
+ u32 rx_fib_index0;
+ u8 protocol;
+ snat_det_out_key_t key0;
+ u8 dont_translate = 0;
+ u32 next0 = ~0;
+ icmp_echo_header_t *echo0, *inner_echo0 = 0;
+ ip4_header_t *inner_ip0;
+ void *l4_header = 0;
+ icmp46_header_t *inner_icmp0;
+ snat_det_map_t *dm0 = 0;
+ ip4_address_t new_addr0;
+ u16 lo_port0, i0;
+ snat_det_session_t *ses0 = 0;
+ ip4_address_t in_addr;
+ u16 in_port;
+
+ icmp0 = (icmp46_header_t *) ip4_next_header (ip0);
+ echo0 = (icmp_echo_header_t *) (icmp0 + 1);
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+ rx_fib_index0 = ip4_fib_table_get_index_for_sw_if_index (sw_if_index0);
+
+ if (!icmp_is_error_message (icmp0))
+ {
+ protocol = SNAT_PROTOCOL_ICMP;
+ in_addr = ip0->src_address;
+ in_port = echo0->identifier;
+ }
+ else
+ {
+ inner_ip0 = (ip4_header_t *) (echo0 + 1);
+ l4_header = ip4_next_header (inner_ip0);
+ protocol = ip_proto_to_snat_proto (inner_ip0->protocol);
+ in_addr = inner_ip0->dst_address;
+ switch (protocol)
+ {
+ case SNAT_PROTOCOL_ICMP:
+ inner_icmp0 = (icmp46_header_t *) l4_header;
+ inner_echo0 = (icmp_echo_header_t *) (inner_icmp0 + 1);
+ in_port = inner_echo0->identifier;
+ break;
+ case SNAT_PROTOCOL_UDP:
+ case SNAT_PROTOCOL_TCP:
+ in_port = ((tcp_udp_header_t *) l4_header)->dst_port;
+ break;
+ default:
+ b0->error = node->errors[NAT_DET_IN2OUT_ERROR_UNSUPPORTED_PROTOCOL];
+ next0 = NAT_DET_IN2OUT_NEXT_DROP;
+ goto out;
+ }
+ }
+
+ dm0 = snat_det_map_by_user (sm, &in_addr);
+ if (PREDICT_FALSE (!dm0))
+ {
+ nat_log_info ("no match for internal host %U",
+ format_ip4_address, &in_addr);
+ if (PREDICT_FALSE (snat_not_translate_fast (sm, node, sw_if_index0, ip0,
+ IP_PROTOCOL_ICMP,
+ rx_fib_index0)))
+ {
+ dont_translate = 1;
+ goto out;
+ }
+ next0 = NAT_DET_IN2OUT_NEXT_DROP;
+ b0->error = node->errors[NAT_DET_IN2OUT_ERROR_NO_TRANSLATION];
+ goto out;
+ }
+
+ snat_det_forward (dm0, &in_addr, &new_addr0, &lo_port0);
+
+ key0.ext_host_addr = ip0->dst_address;
+ key0.ext_host_port = 0;
+
+ ses0 = snat_det_find_ses_by_in (dm0, &in_addr, in_port, key0);
+ if (PREDICT_FALSE (!ses0))
+ {
+ if (PREDICT_FALSE (snat_not_translate_fast (sm, node, sw_if_index0, ip0,
+ IP_PROTOCOL_ICMP,
+ rx_fib_index0)))
+ {
+ dont_translate = 1;
+ goto out;
+ }
+ if (icmp0->type != ICMP4_echo_request)
+ {
+ b0->error = node->errors[NAT_DET_IN2OUT_ERROR_BAD_ICMP_TYPE];
+ next0 = NAT_DET_IN2OUT_NEXT_DROP;
+ goto out;
+ }
+ for (i0 = 0; i0 < dm0->ports_per_host; i0++)
+ {
+ key0.out_port = clib_host_to_net_u16 (lo_port0 +
+ ((i0 +
+ clib_net_to_host_u16
+ (echo0->identifier)) %
+ dm0->ports_per_host));
+
+ if (snat_det_get_ses_by_out (dm0, &in_addr, key0.as_u64))
+ continue;
+
+ ses0 =
+ snat_det_ses_create (dm0, &in_addr, echo0->identifier, &key0);
+ break;
+ }
+ if (PREDICT_FALSE (!ses0))
+ {
+ next0 = NAT_DET_IN2OUT_NEXT_DROP;
+ b0->error = node->errors[NAT_DET_IN2OUT_ERROR_OUT_OF_PORTS];
+ goto out;
+ }
+ }
+
+ if (PREDICT_FALSE (icmp0->type != ICMP4_echo_request &&
+ !icmp_is_error_message (icmp0)))
+ {
+ b0->error = node->errors[NAT_DET_IN2OUT_ERROR_BAD_ICMP_TYPE];
+ next0 = NAT_DET_IN2OUT_NEXT_DROP;
+ goto out;
+ }
+
+ u32 now = (u32) vlib_time_now (sm->vlib_main);
+
+ ses0->state = SNAT_SESSION_ICMP_ACTIVE;
+ ses0->expire = now + sm->icmp_timeout;
+
+out:
+ *p_proto = protocol;
+ if (ses0)
+ {
+ p_value->addr = new_addr0;
+ p_value->fib_index = sm->outside_fib_index;
+ p_value->port = ses0->out.out_port;
+ }
+ *p_dont_translate = dont_translate;
+ if (d)
+ *(snat_det_session_t **) d = ses0;
+ if (e)
+ *(snat_det_map_t **) e = dm0;
+ return next0;
+}
+
+static uword
+snat_det_in2out_node_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+ u32 n_left_from, *from, *to_next;
+ nat_det_in2out_next_t next_index;
+ u32 pkts_processed = 0;
+ snat_main_t *sm = &snat_main;
+ u32 now = (u32) vlib_time_now (vm);
+ u32 thread_index = vm->thread_index;
+
+ from = vlib_frame_vector_args (frame);
+ n_left_from = frame->n_vectors;
+ next_index = node->cached_next_index;
+
+ while (n_left_from > 0)
+ {
+ u32 n_left_to_next;
+
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+ while (n_left_from >= 4 && n_left_to_next >= 2)
+ {
+ u32 bi0, bi1;
+ vlib_buffer_t *b0, *b1;
+ u32 next0, next1;
+ u32 sw_if_index0, sw_if_index1;
+ ip4_header_t *ip0, *ip1;
+ ip_csum_t sum0, sum1;
+ ip4_address_t new_addr0, old_addr0, new_addr1, old_addr1;
+ u16 old_port0, new_port0, lo_port0, i0;
+ u16 old_port1, new_port1, lo_port1, i1;
+ udp_header_t *udp0, *udp1;
+ tcp_header_t *tcp0, *tcp1;
+ u32 proto0, proto1;
+ snat_det_out_key_t key0, key1;
+ snat_det_map_t *dm0, *dm1;
+ snat_det_session_t *ses0 = 0, *ses1 = 0;
+ u32 rx_fib_index0, rx_fib_index1;
+ icmp46_header_t *icmp0, *icmp1;
+
+ /* Prefetch next iteration. */
+ {
+ vlib_buffer_t *p2, *p3;
+
+ p2 = vlib_get_buffer (vm, from[2]);
+ p3 = vlib_get_buffer (vm, from[3]);
+
+ vlib_prefetch_buffer_header (p2, LOAD);
+ vlib_prefetch_buffer_header (p3, LOAD);
+
+ CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, STORE);
+ CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, STORE);
+ }
+
+ /* speculatively enqueue b0 and b1 to the current next frame */
+ to_next[0] = bi0 = from[0];
+ to_next[1] = bi1 = from[1];
+ from += 2;
+ to_next += 2;
+ n_left_from -= 2;
+ n_left_to_next -= 2;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ b1 = vlib_get_buffer (vm, bi1);
+
+ next0 = NAT_DET_IN2OUT_NEXT_LOOKUP;
+ next1 = NAT_DET_IN2OUT_NEXT_LOOKUP;
+
+ ip0 = vlib_buffer_get_current (b0);
+ udp0 = ip4_next_header (ip0);
+ tcp0 = (tcp_header_t *) udp0;
+
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+
+ if (PREDICT_FALSE (ip0->ttl == 1))
+ {
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
+ icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
+ ICMP4_time_exceeded_ttl_exceeded_in_transit,
+ 0);
+ next0 = NAT_DET_IN2OUT_NEXT_ICMP_ERROR;
+ goto trace0;
+ }
+
+ proto0 = ip_proto_to_snat_proto (ip0->protocol);
+
+ if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
+ {
+ rx_fib_index0 =
+ ip4_fib_table_get_index_for_sw_if_index (sw_if_index0);
+ icmp0 = (icmp46_header_t *) udp0;
+
+ next0 = icmp_in2out (sm, b0, ip0, icmp0, sw_if_index0,
+ rx_fib_index0, node, next0, thread_index,
+ &ses0, &dm0);
+ goto trace0;
+ }
+
+ dm0 = snat_det_map_by_user (sm, &ip0->src_address);
+ if (PREDICT_FALSE (!dm0))
+ {
+ nat_log_info ("no match for internal host %U",
+ format_ip4_address, &ip0->src_address);
+ next0 = NAT_DET_IN2OUT_NEXT_DROP;
+ b0->error = node->errors[NAT_DET_IN2OUT_ERROR_NO_TRANSLATION];
+ goto trace0;
+ }
+
+ snat_det_forward (dm0, &ip0->src_address, &new_addr0, &lo_port0);
+
+ key0.ext_host_addr = ip0->dst_address;
+ key0.ext_host_port = tcp0->dst;
+
+ ses0 =
+ snat_det_find_ses_by_in (dm0, &ip0->src_address, tcp0->src, key0);
+ if (PREDICT_FALSE (!ses0))
+ {
+ for (i0 = 0; i0 < dm0->ports_per_host; i0++)
+ {
+ key0.out_port = clib_host_to_net_u16 (lo_port0 +
+ ((i0 +
+ clib_net_to_host_u16
+ (tcp0->src)) %
+ dm0->
+ ports_per_host));
+
+ if (snat_det_get_ses_by_out
+ (dm0, &ip0->src_address, key0.as_u64))
+ continue;
+
+ ses0 =
+ snat_det_ses_create (dm0, &ip0->src_address, tcp0->src,
+ &key0);
+ break;
+ }
+ if (PREDICT_FALSE (!ses0))
+ {
+ /* too many sessions for user, send ICMP error packet */
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
+ icmp4_error_set_vnet_buffer (b0,
+ ICMP4_destination_unreachable,
+ ICMP4_destination_unreachable_destination_unreachable_host,
+ 0);
+ next0 = NAT_DET_IN2OUT_NEXT_ICMP_ERROR;
+ goto trace0;
+ }
+ }
+
+ new_port0 = ses0->out.out_port;
+
+ old_addr0.as_u32 = ip0->src_address.as_u32;
+ ip0->src_address.as_u32 = new_addr0.as_u32;
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = sm->outside_fib_index;
+
+ sum0 = ip0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0.as_u32, new_addr0.as_u32,
+ ip4_header_t,
+ src_address /* changed member */ );
+ ip0->checksum = ip_csum_fold (sum0);
+
+ if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
+ {
+ if (tcp0->flags & TCP_FLAG_SYN)
+ ses0->state = SNAT_SESSION_TCP_SYN_SENT;
+ else if (tcp0->flags & TCP_FLAG_ACK
+ && ses0->state == SNAT_SESSION_TCP_SYN_SENT)
+ ses0->state = SNAT_SESSION_TCP_ESTABLISHED;
+ else if (tcp0->flags & TCP_FLAG_FIN
+ && ses0->state == SNAT_SESSION_TCP_ESTABLISHED)
+ ses0->state = SNAT_SESSION_TCP_FIN_WAIT;
+ else if (tcp0->flags & TCP_FLAG_ACK
+ && ses0->state == SNAT_SESSION_TCP_FIN_WAIT)
+ snat_det_ses_close (dm0, ses0);
+ else if (tcp0->flags & TCP_FLAG_FIN
+ && ses0->state == SNAT_SESSION_TCP_CLOSE_WAIT)
+ ses0->state = SNAT_SESSION_TCP_LAST_ACK;
+ else if (tcp0->flags == 0
+ && ses0->state == SNAT_SESSION_UNKNOWN)
+ ses0->state = SNAT_SESSION_TCP_ESTABLISHED;
+
+ old_port0 = tcp0->src;
+ tcp0->src = new_port0;
+
+ sum0 = tcp0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0.as_u32, new_addr0.as_u32,
+ ip4_header_t,
+ dst_address /* changed member */ );
+ sum0 = ip_csum_update (sum0, old_port0, new_port0,
+ ip4_header_t /* cheat */ ,
+ length /* changed member */ );
+ mss_clamping (sm, tcp0, &sum0);
+ tcp0->checksum = ip_csum_fold (sum0);
+ }
+ else
+ {
+ ses0->state = SNAT_SESSION_UDP_ACTIVE;
+ old_port0 = udp0->src_port;
+ udp0->src_port = new_port0;
+ udp0->checksum = 0;
+ }
+
+ switch (ses0->state)
+ {
+ case SNAT_SESSION_UDP_ACTIVE:
+ ses0->expire = now + sm->udp_timeout;
+ break;
+ case SNAT_SESSION_TCP_SYN_SENT:
+ case SNAT_SESSION_TCP_FIN_WAIT:
+ case SNAT_SESSION_TCP_CLOSE_WAIT:
+ case SNAT_SESSION_TCP_LAST_ACK:
+ ses0->expire = now + sm->tcp_transitory_timeout;
+ break;
+ case SNAT_SESSION_TCP_ESTABLISHED:
+ ses0->expire = now + sm->tcp_established_timeout;
+ break;
+ }
+
+ trace0:
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ nat_det_in2out_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->sw_if_index = sw_if_index0;
+ t->next_index = next0;
+ t->session_index = ~0;
+ if (ses0)
+ t->session_index = ses0 - dm0->sessions;
+ }
+
+ pkts_processed += next0 != NAT_DET_IN2OUT_NEXT_DROP;
+
+ ip1 = vlib_buffer_get_current (b1);
+ udp1 = ip4_next_header (ip1);
+ tcp1 = (tcp_header_t *) udp1;
+
+ sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX];
+
+ if (PREDICT_FALSE (ip1->ttl == 1))
+ {
+ vnet_buffer (b1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
+ icmp4_error_set_vnet_buffer (b1, ICMP4_time_exceeded,
+ ICMP4_time_exceeded_ttl_exceeded_in_transit,
+ 0);
+ next1 = NAT_DET_IN2OUT_NEXT_ICMP_ERROR;
+ goto trace1;
+ }
+
+ proto1 = ip_proto_to_snat_proto (ip1->protocol);
+
+ if (PREDICT_FALSE (proto1 == SNAT_PROTOCOL_ICMP))
+ {
+ rx_fib_index1 =
+ ip4_fib_table_get_index_for_sw_if_index (sw_if_index1);
+ icmp1 = (icmp46_header_t *) udp1;
+
+ next1 = icmp_in2out (sm, b1, ip1, icmp1, sw_if_index1,
+ rx_fib_index1, node, next1, thread_index,
+ &ses1, &dm1);
+ goto trace1;
+ }
+
+ dm1 = snat_det_map_by_user (sm, &ip1->src_address);
+ if (PREDICT_FALSE (!dm1))
+ {
+ nat_log_info ("no match for internal host %U",
+ format_ip4_address, &ip0->src_address);
+ next1 = NAT_DET_IN2OUT_NEXT_DROP;
+ b1->error = node->errors[NAT_DET_IN2OUT_ERROR_NO_TRANSLATION];
+ goto trace1;
+ }
+
+ snat_det_forward (dm1, &ip1->src_address, &new_addr1, &lo_port1);
+
+ key1.ext_host_addr = ip1->dst_address;
+ key1.ext_host_port = tcp1->dst;
+
+ ses1 =
+ snat_det_find_ses_by_in (dm1, &ip1->src_address, tcp1->src, key1);
+ if (PREDICT_FALSE (!ses1))
+ {
+ for (i1 = 0; i1 < dm1->ports_per_host; i1++)
+ {
+ key1.out_port = clib_host_to_net_u16 (lo_port1 +
+ ((i1 +
+ clib_net_to_host_u16
+ (tcp1->src)) %
+ dm1->
+ ports_per_host));
+
+ if (snat_det_get_ses_by_out
+ (dm1, &ip1->src_address, key1.as_u64))
+ continue;
+
+ ses1 =
+ snat_det_ses_create (dm1, &ip1->src_address, tcp1->src,
+ &key1);
+ break;
+ }
+ if (PREDICT_FALSE (!ses1))
+ {
+ /* too many sessions for user, send ICMP error packet */
+ vnet_buffer (b1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
+ icmp4_error_set_vnet_buffer (b1,
+ ICMP4_destination_unreachable,
+ ICMP4_destination_unreachable_destination_unreachable_host,
+ 0);
+ next1 = NAT_DET_IN2OUT_NEXT_ICMP_ERROR;
+ goto trace1;
+ }
+ }
+
+ new_port1 = ses1->out.out_port;
+
+ old_addr1.as_u32 = ip1->src_address.as_u32;
+ ip1->src_address.as_u32 = new_addr1.as_u32;
+ vnet_buffer (b1)->sw_if_index[VLIB_TX] = sm->outside_fib_index;
+
+ sum1 = ip1->checksum;
+ sum1 = ip_csum_update (sum1, old_addr1.as_u32, new_addr1.as_u32,
+ ip4_header_t,
+ src_address /* changed member */ );
+ ip1->checksum = ip_csum_fold (sum1);
+
+ if (PREDICT_TRUE (proto1 == SNAT_PROTOCOL_TCP))
+ {
+ if (tcp1->flags & TCP_FLAG_SYN)
+ ses1->state = SNAT_SESSION_TCP_SYN_SENT;
+ else if (tcp1->flags & TCP_FLAG_ACK
+ && ses1->state == SNAT_SESSION_TCP_SYN_SENT)
+ ses1->state = SNAT_SESSION_TCP_ESTABLISHED;
+ else if (tcp1->flags & TCP_FLAG_FIN
+ && ses1->state == SNAT_SESSION_TCP_ESTABLISHED)
+ ses1->state = SNAT_SESSION_TCP_FIN_WAIT;
+ else if (tcp1->flags & TCP_FLAG_ACK
+ && ses1->state == SNAT_SESSION_TCP_FIN_WAIT)
+ snat_det_ses_close (dm1, ses1);
+ else if (tcp1->flags & TCP_FLAG_FIN
+ && ses1->state == SNAT_SESSION_TCP_CLOSE_WAIT)
+ ses1->state = SNAT_SESSION_TCP_LAST_ACK;
+ else if (tcp1->flags == 0
+ && ses1->state == SNAT_SESSION_UNKNOWN)
+ ses1->state = SNAT_SESSION_TCP_ESTABLISHED;
+
+ old_port1 = tcp1->src;
+ tcp1->src = new_port1;
+
+ sum1 = tcp1->checksum;
+ sum1 = ip_csum_update (sum1, old_addr1.as_u32, new_addr1.as_u32,
+ ip4_header_t,
+ dst_address /* changed member */ );
+ sum1 = ip_csum_update (sum1, old_port1, new_port1,
+ ip4_header_t /* cheat */ ,
+ length /* changed member */ );
+ mss_clamping (sm, tcp1, &sum1);
+ tcp1->checksum = ip_csum_fold (sum1);
+ }
+ else
+ {
+ ses1->state = SNAT_SESSION_UDP_ACTIVE;
+ old_port1 = udp1->src_port;
+ udp1->src_port = new_port1;
+ udp1->checksum = 0;
+ }
+
+ switch (ses1->state)
+ {
+ case SNAT_SESSION_UDP_ACTIVE:
+ ses1->expire = now + sm->udp_timeout;
+ break;
+ case SNAT_SESSION_TCP_SYN_SENT:
+ case SNAT_SESSION_TCP_FIN_WAIT:
+ case SNAT_SESSION_TCP_CLOSE_WAIT:
+ case SNAT_SESSION_TCP_LAST_ACK:
+ ses1->expire = now + sm->tcp_transitory_timeout;
+ break;
+ case SNAT_SESSION_TCP_ESTABLISHED:
+ ses1->expire = now + sm->tcp_established_timeout;
+ break;
+ }
+
+ trace1:
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b1->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ nat_det_in2out_trace_t *t =
+ vlib_add_trace (vm, node, b1, sizeof (*t));
+ t->sw_if_index = sw_if_index1;
+ t->next_index = next1;
+ t->session_index = ~0;
+ if (ses1)
+ t->session_index = ses1 - dm1->sessions;
+ }
+
+ pkts_processed += next1 != NAT_DET_IN2OUT_NEXT_DROP;
+
+ /* verify speculative enqueues, maybe switch current next frame */
+ vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
+ to_next, n_left_to_next,
+ bi0, bi1, next0, next1);
+ }
+
+ while (n_left_from > 0 && n_left_to_next > 0)
+ {
+ u32 bi0;
+ vlib_buffer_t *b0;
+ u32 next0;
+ u32 sw_if_index0;
+ ip4_header_t *ip0;
+ ip_csum_t sum0;
+ ip4_address_t new_addr0, old_addr0;
+ u16 old_port0, new_port0, lo_port0, i0;
+ udp_header_t *udp0;
+ tcp_header_t *tcp0;
+ u32 proto0;
+ snat_det_out_key_t key0;
+ snat_det_map_t *dm0;
+ snat_det_session_t *ses0 = 0;
+ u32 rx_fib_index0;
+ icmp46_header_t *icmp0;
+
+ /* speculatively enqueue b0 to the current next frame */
+ bi0 = from[0];
+ to_next[0] = bi0;
+ from += 1;
+ to_next += 1;
+ n_left_from -= 1;
+ n_left_to_next -= 1;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ next0 = NAT_DET_IN2OUT_NEXT_LOOKUP;
+
+ ip0 = vlib_buffer_get_current (b0);
+ udp0 = ip4_next_header (ip0);
+ tcp0 = (tcp_header_t *) udp0;
+
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+
+ if (PREDICT_FALSE (ip0->ttl == 1))
+ {
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
+ icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
+ ICMP4_time_exceeded_ttl_exceeded_in_transit,
+ 0);
+ next0 = NAT_DET_IN2OUT_NEXT_ICMP_ERROR;
+ goto trace00;
+ }
+
+ proto0 = ip_proto_to_snat_proto (ip0->protocol);
+
+ if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
+ {
+ rx_fib_index0 =
+ ip4_fib_table_get_index_for_sw_if_index (sw_if_index0);
+ icmp0 = (icmp46_header_t *) udp0;
+
+ next0 = icmp_in2out (sm, b0, ip0, icmp0, sw_if_index0,
+ rx_fib_index0, node, next0, thread_index,
+ &ses0, &dm0);
+ goto trace00;
+ }
+
+ dm0 = snat_det_map_by_user (sm, &ip0->src_address);
+ if (PREDICT_FALSE (!dm0))
+ {
+ nat_log_info ("no match for internal host %U",
+ format_ip4_address, &ip0->src_address);
+ next0 = NAT_DET_IN2OUT_NEXT_DROP;
+ b0->error = node->errors[NAT_DET_IN2OUT_ERROR_NO_TRANSLATION];
+ goto trace00;
+ }
+
+ snat_det_forward (dm0, &ip0->src_address, &new_addr0, &lo_port0);
+
+ key0.ext_host_addr = ip0->dst_address;
+ key0.ext_host_port = tcp0->dst;
+
+ ses0 =
+ snat_det_find_ses_by_in (dm0, &ip0->src_address, tcp0->src, key0);
+ if (PREDICT_FALSE (!ses0))
+ {
+ for (i0 = 0; i0 < dm0->ports_per_host; i0++)
+ {
+ key0.out_port = clib_host_to_net_u16 (lo_port0 +
+ ((i0 +
+ clib_net_to_host_u16
+ (tcp0->src)) %
+ dm0->
+ ports_per_host));
+
+ if (snat_det_get_ses_by_out
+ (dm0, &ip0->src_address, key0.as_u64))
+ continue;
+
+ ses0 =
+ snat_det_ses_create (dm0, &ip0->src_address, tcp0->src,
+ &key0);
+ break;
+ }
+ if (PREDICT_FALSE (!ses0))
+ {
+ /* too many sessions for user, send ICMP error packet */
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
+ icmp4_error_set_vnet_buffer (b0,
+ ICMP4_destination_unreachable,
+ ICMP4_destination_unreachable_destination_unreachable_host,
+ 0);
+ next0 = NAT_DET_IN2OUT_NEXT_ICMP_ERROR;
+ goto trace00;
+ }
+ }
+
+ new_port0 = ses0->out.out_port;
+
+ old_addr0.as_u32 = ip0->src_address.as_u32;
+ ip0->src_address.as_u32 = new_addr0.as_u32;
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = sm->outside_fib_index;
+
+ sum0 = ip0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0.as_u32, new_addr0.as_u32,
+ ip4_header_t,
+ src_address /* changed member */ );
+ ip0->checksum = ip_csum_fold (sum0);
+
+ if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
+ {
+ if (tcp0->flags & TCP_FLAG_SYN)
+ ses0->state = SNAT_SESSION_TCP_SYN_SENT;
+ else if (tcp0->flags & TCP_FLAG_ACK
+ && ses0->state == SNAT_SESSION_TCP_SYN_SENT)
+ ses0->state = SNAT_SESSION_TCP_ESTABLISHED;
+ else if (tcp0->flags & TCP_FLAG_FIN
+ && ses0->state == SNAT_SESSION_TCP_ESTABLISHED)
+ ses0->state = SNAT_SESSION_TCP_FIN_WAIT;
+ else if (tcp0->flags & TCP_FLAG_ACK
+ && ses0->state == SNAT_SESSION_TCP_FIN_WAIT)
+ snat_det_ses_close (dm0, ses0);
+ else if (tcp0->flags & TCP_FLAG_FIN
+ && ses0->state == SNAT_SESSION_TCP_CLOSE_WAIT)
+ ses0->state = SNAT_SESSION_TCP_LAST_ACK;
+ else if (tcp0->flags == 0
+ && ses0->state == SNAT_SESSION_UNKNOWN)
+ ses0->state = SNAT_SESSION_TCP_ESTABLISHED;
+
+ old_port0 = tcp0->src;
+ tcp0->src = new_port0;
+
+ sum0 = tcp0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0.as_u32, new_addr0.as_u32,
+ ip4_header_t,
+ dst_address /* changed member */ );
+ sum0 = ip_csum_update (sum0, old_port0, new_port0,
+ ip4_header_t /* cheat */ ,
+ length /* changed member */ );
+ mss_clamping (sm, tcp0, &sum0);
+ tcp0->checksum = ip_csum_fold (sum0);
+ }
+ else
+ {
+ ses0->state = SNAT_SESSION_UDP_ACTIVE;
+ old_port0 = udp0->src_port;
+ udp0->src_port = new_port0;
+ udp0->checksum = 0;
+ }
+
+ switch (ses0->state)
+ {
+ case SNAT_SESSION_UDP_ACTIVE:
+ ses0->expire = now + sm->udp_timeout;
+ break;
+ case SNAT_SESSION_TCP_SYN_SENT:
+ case SNAT_SESSION_TCP_FIN_WAIT:
+ case SNAT_SESSION_TCP_CLOSE_WAIT:
+ case SNAT_SESSION_TCP_LAST_ACK:
+ ses0->expire = now + sm->tcp_transitory_timeout;
+ break;
+ case SNAT_SESSION_TCP_ESTABLISHED:
+ ses0->expire = now + sm->tcp_established_timeout;
+ break;
+ }
+
+ trace00:
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ nat_det_in2out_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->sw_if_index = sw_if_index0;
+ t->next_index = next0;
+ t->session_index = ~0;
+ if (ses0)
+ t->session_index = ses0 - dm0->sessions;
+ }
+
+ pkts_processed += next0 != NAT_DET_IN2OUT_NEXT_DROP;
+
+ /* verify speculative enqueue, maybe switch current next frame */
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
+ to_next, n_left_to_next,
+ bi0, next0);
+ }
+
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
+
+ vlib_node_increment_counter (vm, snat_det_in2out_node.index,
+ NAT_DET_IN2OUT_ERROR_IN2OUT_PACKETS,
+ pkts_processed);
+ return frame->n_vectors;
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (snat_det_in2out_node) = {
+ .function = snat_det_in2out_node_fn,
+ .name = "nat44-det-in2out",
+ .vector_size = sizeof (u32),
+ .format_trace = format_nat_det_in2out_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .n_errors = ARRAY_LEN(nat_det_in2out_error_strings),
+ .error_strings = nat_det_in2out_error_strings,
+ .n_next_nodes = NAT_DET_IN2OUT_N_NEXT,
+ /* edit / add dispositions here */
+ .next_nodes = {
+ [NAT_DET_IN2OUT_NEXT_DROP] = "error-drop",
+ [NAT_DET_IN2OUT_NEXT_LOOKUP] = "ip4-lookup",
+ [NAT_DET_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
+ },
+};
+/* *INDENT-ON* */
+
+VLIB_NODE_FUNCTION_MULTIARCH (snat_det_in2out_node, snat_det_in2out_node_fn);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
--- /dev/null
+/*
+ * Copyright (c) 2018 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/**
+ * @file
+ * @brief Deterministic/CGN NAT44 outside to inside network translation
+ */
+
+#include <vlib/vlib.h>
+#include <vnet/vnet.h>
+#include <vnet/ip/ip.h>
+#include <vnet/fib/ip4_fib.h>
+#include <vppinfra/error.h>
+#include <vppinfra/elog.h>
+#include <nat/nat.h>
+#include <nat/nat_det.h>
+#include <nat/nat_inlines.h>
+
+typedef enum
+{
+ NAT_DET_OUT2IN_NEXT_DROP,
+ NAT_DET_OUT2IN_NEXT_LOOKUP,
+ NAT_DET_OUT2IN_NEXT_ICMP_ERROR,
+ NAT_DET_OUT2IN_N_NEXT,
+} nat_det_out2in_next_t;
+
+typedef struct
+{
+ u32 sw_if_index;
+ u32 next_index;
+ u32 session_index;
+} nat_det_out2in_trace_t;
+
+#define foreach_nat_det_out2in_error \
+_(UNSUPPORTED_PROTOCOL, "Unsupported protocol") \
+_(NO_TRANSLATION, "No translation") \
+_(BAD_ICMP_TYPE, "unsupported ICMP type") \
+_(OUT2IN_PACKETS, "Good out2in packets processed")
+
+typedef enum
+{
+#define _(sym,str) NAT_DET_OUT2IN_ERROR_##sym,
+ foreach_nat_det_out2in_error
+#undef _
+ SNAT_OUT2IN_N_ERROR,
+} nat_det_out2in_error_t;
+
+static char *nat_det_out2in_error_strings[] = {
+#define _(sym,string) string,
+ foreach_nat_det_out2in_error
+#undef _
+};
+
+vlib_node_registration_t snat_det_out2in_node;
+
+static u8 *
+format_nat_det_out2in_trace (u8 * s, va_list * args)
+{
+ CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
+ CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
+ nat_det_out2in_trace_t *t = va_arg (*args, nat_det_out2in_trace_t *);
+
+ s =
+ format (s,
+ "NAT_DET_OUT2IN: sw_if_index %d, next index %d, session index %d",
+ t->sw_if_index, t->next_index, t->session_index);
+ return s;
+}
+
+/**
+ * Get address and port values to be used for ICMP packet translation
+ * and create session if needed
+ *
+ * @param[in,out] sm NAT main
+ * @param[in,out] node NAT node runtime
+ * @param[in] thread_index thread index
+ * @param[in,out] b0 buffer containing packet to be translated
+ * @param[out] p_proto protocol used for matching
+ * @param[out] p_value address and port after NAT translation
+ * @param[out] p_dont_translate if packet should not be translated
+ * @param d optional parameter
+ * @param e optional parameter
+ */
+u32
+icmp_match_out2in_det (snat_main_t * sm, vlib_node_runtime_t * node,
+ u32 thread_index, vlib_buffer_t * b0,
+ ip4_header_t * ip0, u8 * p_proto,
+ snat_session_key_t * p_value,
+ u8 * p_dont_translate, void *d, void *e)
+{
+ icmp46_header_t *icmp0;
+ u32 sw_if_index0;
+ u8 protocol;
+ snat_det_out_key_t key0;
+ u8 dont_translate = 0;
+ u32 next0 = ~0;
+ icmp_echo_header_t *echo0, *inner_echo0 = 0;
+ ip4_header_t *inner_ip0;
+ void *l4_header = 0;
+ icmp46_header_t *inner_icmp0;
+ snat_det_map_t *dm0 = 0;
+ ip4_address_t new_addr0 = { {0} };
+ snat_det_session_t *ses0 = 0;
+ ip4_address_t out_addr;
+
+ icmp0 = (icmp46_header_t *) ip4_next_header (ip0);
+ echo0 = (icmp_echo_header_t *) (icmp0 + 1);
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+
+ if (!icmp_is_error_message (icmp0))
+ {
+ protocol = SNAT_PROTOCOL_ICMP;
+ key0.ext_host_addr = ip0->src_address;
+ key0.ext_host_port = 0;
+ key0.out_port = echo0->identifier;
+ out_addr = ip0->dst_address;
+ }
+ else
+ {
+ inner_ip0 = (ip4_header_t *) (echo0 + 1);
+ l4_header = ip4_next_header (inner_ip0);
+ protocol = ip_proto_to_snat_proto (inner_ip0->protocol);
+ key0.ext_host_addr = inner_ip0->dst_address;
+ out_addr = inner_ip0->src_address;
+ switch (protocol)
+ {
+ case SNAT_PROTOCOL_ICMP:
+ inner_icmp0 = (icmp46_header_t *) l4_header;
+ inner_echo0 = (icmp_echo_header_t *) (inner_icmp0 + 1);
+ key0.ext_host_port = 0;
+ key0.out_port = inner_echo0->identifier;
+ break;
+ case SNAT_PROTOCOL_UDP:
+ case SNAT_PROTOCOL_TCP:
+ key0.ext_host_port = ((tcp_udp_header_t *) l4_header)->dst_port;
+ key0.out_port = ((tcp_udp_header_t *) l4_header)->src_port;
+ break;
+ default:
+ b0->error = node->errors[NAT_DET_OUT2IN_ERROR_UNSUPPORTED_PROTOCOL];
+ next0 = NAT_DET_OUT2IN_NEXT_DROP;
+ goto out;
+ }
+ }
+
+ dm0 = snat_det_map_by_out (sm, &out_addr);
+ if (PREDICT_FALSE (!dm0))
+ {
+ /* Don't NAT packet aimed at the intfc address */
+ if (PREDICT_FALSE (is_interface_addr (sm, node, sw_if_index0,
+ ip0->dst_address.as_u32)))
+ {
+ dont_translate = 1;
+ goto out;
+ }
+ nat_log_info ("unknown dst address: %U",
+ format_ip4_address, &ip0->dst_address);
+ goto out;
+ }
+
+ snat_det_reverse (dm0, &ip0->dst_address,
+ clib_net_to_host_u16 (key0.out_port), &new_addr0);
+
+ ses0 = snat_det_get_ses_by_out (dm0, &new_addr0, key0.as_u64);
+ if (PREDICT_FALSE (!ses0))
+ {
+ /* Don't NAT packet aimed at the intfc address */
+ if (PREDICT_FALSE (is_interface_addr (sm, node, sw_if_index0,
+ ip0->dst_address.as_u32)))
+ {
+ dont_translate = 1;
+ goto out;
+ }
+ nat_log_info ("no match src %U:%d dst %U:%d for user %U",
+ format_ip4_address, &key0.ext_host_addr,
+ clib_net_to_host_u16 (key0.ext_host_port),
+ format_ip4_address, &out_addr,
+ clib_net_to_host_u16 (key0.out_port),
+ format_ip4_address, &new_addr0);
+ b0->error = node->errors[NAT_DET_OUT2IN_ERROR_NO_TRANSLATION];
+ next0 = NAT_DET_OUT2IN_NEXT_DROP;
+ goto out;
+ }
+
+ if (PREDICT_FALSE (icmp0->type != ICMP4_echo_reply &&
+ !icmp_is_error_message (icmp0)))
+ {
+ b0->error = node->errors[NAT_DET_OUT2IN_ERROR_BAD_ICMP_TYPE];
+ next0 = NAT_DET_OUT2IN_NEXT_DROP;
+ goto out;
+ }
+
+ goto out;
+
+out:
+ *p_proto = protocol;
+ if (ses0)
+ {
+ p_value->addr = new_addr0;
+ p_value->fib_index = sm->inside_fib_index;
+ p_value->port = ses0->in_port;
+ }
+ *p_dont_translate = dont_translate;
+ if (d)
+ *(snat_det_session_t **) d = ses0;
+ if (e)
+ *(snat_det_map_t **) e = dm0;
+ return next0;
+}
+
+static uword
+snat_det_out2in_node_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+ u32 n_left_from, *from, *to_next;
+ nat_det_out2in_next_t next_index;
+ u32 pkts_processed = 0;
+ snat_main_t *sm = &snat_main;
+ u32 thread_index = vm->thread_index;
+
+ from = vlib_frame_vector_args (frame);
+ n_left_from = frame->n_vectors;
+ next_index = node->cached_next_index;
+
+ while (n_left_from > 0)
+ {
+ u32 n_left_to_next;
+
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+ while (n_left_from >= 4 && n_left_to_next >= 2)
+ {
+ u32 bi0, bi1;
+ vlib_buffer_t *b0, *b1;
+ u32 next0 = NAT_DET_OUT2IN_NEXT_LOOKUP;
+ u32 next1 = NAT_DET_OUT2IN_NEXT_LOOKUP;
+ u32 sw_if_index0, sw_if_index1;
+ ip4_header_t *ip0, *ip1;
+ ip_csum_t sum0, sum1;
+ ip4_address_t new_addr0, old_addr0, new_addr1, old_addr1;
+ u16 new_port0, old_port0, old_port1, new_port1;
+ udp_header_t *udp0, *udp1;
+ tcp_header_t *tcp0, *tcp1;
+ u32 proto0, proto1;
+ snat_det_out_key_t key0, key1;
+ snat_det_map_t *dm0, *dm1;
+ snat_det_session_t *ses0 = 0, *ses1 = 0;
+ u32 rx_fib_index0, rx_fib_index1;
+ icmp46_header_t *icmp0, *icmp1;
+
+ /* Prefetch next iteration. */
+ {
+ vlib_buffer_t *p2, *p3;
+
+ p2 = vlib_get_buffer (vm, from[2]);
+ p3 = vlib_get_buffer (vm, from[3]);
+
+ vlib_prefetch_buffer_header (p2, LOAD);
+ vlib_prefetch_buffer_header (p3, LOAD);
+
+ CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, STORE);
+ CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, STORE);
+ }
+
+ /* speculatively enqueue b0 and b1 to the current next frame */
+ to_next[0] = bi0 = from[0];
+ to_next[1] = bi1 = from[1];
+ from += 2;
+ to_next += 2;
+ n_left_from -= 2;
+ n_left_to_next -= 2;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ b1 = vlib_get_buffer (vm, bi1);
+
+ ip0 = vlib_buffer_get_current (b0);
+ udp0 = ip4_next_header (ip0);
+ tcp0 = (tcp_header_t *) udp0;
+
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+
+ if (PREDICT_FALSE (ip0->ttl == 1))
+ {
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
+ icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
+ ICMP4_time_exceeded_ttl_exceeded_in_transit,
+ 0);
+ next0 = NAT_DET_OUT2IN_NEXT_ICMP_ERROR;
+ goto trace0;
+ }
+
+ proto0 = ip_proto_to_snat_proto (ip0->protocol);
+
+ if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
+ {
+ rx_fib_index0 =
+ ip4_fib_table_get_index_for_sw_if_index (sw_if_index0);
+ icmp0 = (icmp46_header_t *) udp0;
+
+ next0 = icmp_out2in (sm, b0, ip0, icmp0, sw_if_index0,
+ rx_fib_index0, node, next0, thread_index,
+ &ses0, &dm0);
+ goto trace0;
+ }
+
+ key0.ext_host_addr = ip0->src_address;
+ key0.ext_host_port = tcp0->src;
+ key0.out_port = tcp0->dst;
+
+ dm0 = snat_det_map_by_out (sm, &ip0->dst_address);
+ if (PREDICT_FALSE (!dm0))
+ {
+ nat_log_info ("unknown dst address: %U",
+ format_ip4_address, &ip0->dst_address);
+ next0 = NAT_DET_OUT2IN_NEXT_DROP;
+ b0->error = node->errors[NAT_DET_OUT2IN_ERROR_NO_TRANSLATION];
+ goto trace0;
+ }
+
+ snat_det_reverse (dm0, &ip0->dst_address,
+ clib_net_to_host_u16 (tcp0->dst), &new_addr0);
+
+ ses0 = snat_det_get_ses_by_out (dm0, &new_addr0, key0.as_u64);
+ if (PREDICT_FALSE (!ses0))
+ {
+ nat_log_info ("no match src %U:%d dst %U:%d for user %U",
+ format_ip4_address, &ip0->src_address,
+ clib_net_to_host_u16 (tcp0->src),
+ format_ip4_address, &ip0->dst_address,
+ clib_net_to_host_u16 (tcp0->dst),
+ format_ip4_address, &new_addr0);
+ next0 = NAT_DET_OUT2IN_NEXT_DROP;
+ b0->error = node->errors[NAT_DET_OUT2IN_ERROR_NO_TRANSLATION];
+ goto trace0;
+ }
+ new_port0 = ses0->in_port;
+
+ old_addr0 = ip0->dst_address;
+ ip0->dst_address = new_addr0;
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = sm->inside_fib_index;
+
+ sum0 = ip0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0.as_u32, new_addr0.as_u32,
+ ip4_header_t,
+ dst_address /* changed member */ );
+ ip0->checksum = ip_csum_fold (sum0);
+
+ if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
+ {
+ if (tcp0->flags & TCP_FLAG_FIN
+ && ses0->state == SNAT_SESSION_TCP_ESTABLISHED)
+ ses0->state = SNAT_SESSION_TCP_CLOSE_WAIT;
+ else if (tcp0->flags & TCP_FLAG_ACK
+ && ses0->state == SNAT_SESSION_TCP_LAST_ACK)
+ snat_det_ses_close (dm0, ses0);
+
+ old_port0 = tcp0->dst;
+ tcp0->dst = new_port0;
+
+ sum0 = tcp0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0.as_u32, new_addr0.as_u32,
+ ip4_header_t,
+ dst_address /* changed member */ );
+
+ sum0 = ip_csum_update (sum0, old_port0, new_port0,
+ ip4_header_t /* cheat */ ,
+ length /* changed member */ );
+ tcp0->checksum = ip_csum_fold (sum0);
+ }
+ else
+ {
+ old_port0 = udp0->dst_port;
+ udp0->dst_port = new_port0;
+ udp0->checksum = 0;
+ }
+
+ trace0:
+
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ nat_det_out2in_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->sw_if_index = sw_if_index0;
+ t->next_index = next0;
+ t->session_index = ~0;
+ if (ses0)
+ t->session_index = ses0 - dm0->sessions;
+ }
+
+ pkts_processed += next0 != NAT_DET_OUT2IN_NEXT_DROP;
+
+ b1 = vlib_get_buffer (vm, bi1);
+
+ ip1 = vlib_buffer_get_current (b1);
+ udp1 = ip4_next_header (ip1);
+ tcp1 = (tcp_header_t *) udp1;
+
+ sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX];
+
+ if (PREDICT_FALSE (ip1->ttl == 1))
+ {
+ vnet_buffer (b1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
+ icmp4_error_set_vnet_buffer (b1, ICMP4_time_exceeded,
+ ICMP4_time_exceeded_ttl_exceeded_in_transit,
+ 0);
+ next1 = NAT_DET_OUT2IN_NEXT_ICMP_ERROR;
+ goto trace1;
+ }
+
+ proto1 = ip_proto_to_snat_proto (ip1->protocol);
+
+ if (PREDICT_FALSE (proto1 == SNAT_PROTOCOL_ICMP))
+ {
+ rx_fib_index1 =
+ ip4_fib_table_get_index_for_sw_if_index (sw_if_index1);
+ icmp1 = (icmp46_header_t *) udp1;
+
+ next1 = icmp_out2in (sm, b1, ip1, icmp1, sw_if_index1,
+ rx_fib_index1, node, next1, thread_index,
+ &ses1, &dm1);
+ goto trace1;
+ }
+
+ key1.ext_host_addr = ip1->src_address;
+ key1.ext_host_port = tcp1->src;
+ key1.out_port = tcp1->dst;
+
+ dm1 = snat_det_map_by_out (sm, &ip1->dst_address);
+ if (PREDICT_FALSE (!dm1))
+ {
+ nat_log_info ("unknown dst address: %U",
+ format_ip4_address, &ip1->dst_address);
+ next1 = NAT_DET_OUT2IN_NEXT_DROP;
+ b1->error = node->errors[NAT_DET_OUT2IN_ERROR_NO_TRANSLATION];
+ goto trace1;
+ }
+
+ snat_det_reverse (dm1, &ip1->dst_address,
+ clib_net_to_host_u16 (tcp1->dst), &new_addr1);
+
+ ses1 = snat_det_get_ses_by_out (dm1, &new_addr1, key1.as_u64);
+ if (PREDICT_FALSE (!ses1))
+ {
+ nat_log_info ("no match src %U:%d dst %U:%d for user %U",
+ format_ip4_address, &ip1->src_address,
+ clib_net_to_host_u16 (tcp1->src),
+ format_ip4_address, &ip1->dst_address,
+ clib_net_to_host_u16 (tcp1->dst),
+ format_ip4_address, &new_addr1);
+ next1 = NAT_DET_OUT2IN_NEXT_DROP;
+ b1->error = node->errors[NAT_DET_OUT2IN_ERROR_NO_TRANSLATION];
+ goto trace1;
+ }
+ new_port1 = ses1->in_port;
+
+ old_addr1 = ip1->dst_address;
+ ip1->dst_address = new_addr1;
+ vnet_buffer (b1)->sw_if_index[VLIB_TX] = sm->inside_fib_index;
+
+ sum1 = ip1->checksum;
+ sum1 = ip_csum_update (sum1, old_addr1.as_u32, new_addr1.as_u32,
+ ip4_header_t,
+ dst_address /* changed member */ );
+ ip1->checksum = ip_csum_fold (sum1);
+
+ if (PREDICT_TRUE (proto1 == SNAT_PROTOCOL_TCP))
+ {
+ if (tcp1->flags & TCP_FLAG_FIN
+ && ses1->state == SNAT_SESSION_TCP_ESTABLISHED)
+ ses1->state = SNAT_SESSION_TCP_CLOSE_WAIT;
+ else if (tcp1->flags & TCP_FLAG_ACK
+ && ses1->state == SNAT_SESSION_TCP_LAST_ACK)
+ snat_det_ses_close (dm1, ses1);
+
+ old_port1 = tcp1->dst;
+ tcp1->dst = new_port1;
+
+ sum1 = tcp1->checksum;
+ sum1 = ip_csum_update (sum1, old_addr1.as_u32, new_addr1.as_u32,
+ ip4_header_t,
+ dst_address /* changed member */ );
+
+ sum1 = ip_csum_update (sum1, old_port1, new_port1,
+ ip4_header_t /* cheat */ ,
+ length /* changed member */ );
+ tcp1->checksum = ip_csum_fold (sum1);
+ }
+ else
+ {
+ old_port1 = udp1->dst_port;
+ udp1->dst_port = new_port1;
+ udp1->checksum = 0;
+ }
+
+ trace1:
+
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b1->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ nat_det_out2in_trace_t *t =
+ vlib_add_trace (vm, node, b1, sizeof (*t));
+ t->sw_if_index = sw_if_index1;
+ t->next_index = next1;
+ t->session_index = ~0;
+ if (ses1)
+ t->session_index = ses1 - dm1->sessions;
+ }
+
+ pkts_processed += next1 != NAT_DET_OUT2IN_NEXT_DROP;
+
+ /* verify speculative enqueues, maybe switch current next frame */
+ vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
+ to_next, n_left_to_next,
+ bi0, bi1, next0, next1);
+ }
+
+ while (n_left_from > 0 && n_left_to_next > 0)
+ {
+ u32 bi0;
+ vlib_buffer_t *b0;
+ u32 next0 = NAT_DET_OUT2IN_NEXT_LOOKUP;
+ u32 sw_if_index0;
+ ip4_header_t *ip0;
+ ip_csum_t sum0;
+ ip4_address_t new_addr0, old_addr0;
+ u16 new_port0, old_port0;
+ udp_header_t *udp0;
+ tcp_header_t *tcp0;
+ u32 proto0;
+ snat_det_out_key_t key0;
+ snat_det_map_t *dm0;
+ snat_det_session_t *ses0 = 0;
+ u32 rx_fib_index0;
+ icmp46_header_t *icmp0;
+
+ /* speculatively enqueue b0 to the current next frame */
+ bi0 = from[0];
+ to_next[0] = bi0;
+ from += 1;
+ to_next += 1;
+ n_left_from -= 1;
+ n_left_to_next -= 1;
+
+ b0 = vlib_get_buffer (vm, bi0);
+
+ ip0 = vlib_buffer_get_current (b0);
+ udp0 = ip4_next_header (ip0);
+ tcp0 = (tcp_header_t *) udp0;
+
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+
+ if (PREDICT_FALSE (ip0->ttl == 1))
+ {
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
+ icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
+ ICMP4_time_exceeded_ttl_exceeded_in_transit,
+ 0);
+ next0 = NAT_DET_OUT2IN_NEXT_ICMP_ERROR;
+ goto trace00;
+ }
+
+ proto0 = ip_proto_to_snat_proto (ip0->protocol);
+
+ if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
+ {
+ rx_fib_index0 =
+ ip4_fib_table_get_index_for_sw_if_index (sw_if_index0);
+ icmp0 = (icmp46_header_t *) udp0;
+
+ next0 = icmp_out2in (sm, b0, ip0, icmp0, sw_if_index0,
+ rx_fib_index0, node, next0, thread_index,
+ &ses0, &dm0);
+ goto trace00;
+ }
+
+ key0.ext_host_addr = ip0->src_address;
+ key0.ext_host_port = tcp0->src;
+ key0.out_port = tcp0->dst;
+
+ dm0 = snat_det_map_by_out (sm, &ip0->dst_address);
+ if (PREDICT_FALSE (!dm0))
+ {
+ nat_log_info ("unknown dst address: %U",
+ format_ip4_address, &ip0->dst_address);
+ next0 = NAT_DET_OUT2IN_NEXT_DROP;
+ b0->error = node->errors[NAT_DET_OUT2IN_ERROR_NO_TRANSLATION];
+ goto trace00;
+ }
+
+ snat_det_reverse (dm0, &ip0->dst_address,
+ clib_net_to_host_u16 (tcp0->dst), &new_addr0);
+
+ ses0 = snat_det_get_ses_by_out (dm0, &new_addr0, key0.as_u64);
+ if (PREDICT_FALSE (!ses0))
+ {
+ nat_log_info ("no match src %U:%d dst %U:%d for user %U",
+ format_ip4_address, &ip0->src_address,
+ clib_net_to_host_u16 (tcp0->src),
+ format_ip4_address, &ip0->dst_address,
+ clib_net_to_host_u16 (tcp0->dst),
+ format_ip4_address, &new_addr0);
+ next0 = NAT_DET_OUT2IN_NEXT_DROP;
+ b0->error = node->errors[NAT_DET_OUT2IN_ERROR_NO_TRANSLATION];
+ goto trace00;
+ }
+ new_port0 = ses0->in_port;
+
+ old_addr0 = ip0->dst_address;
+ ip0->dst_address = new_addr0;
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = sm->inside_fib_index;
+
+ sum0 = ip0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0.as_u32, new_addr0.as_u32,
+ ip4_header_t,
+ dst_address /* changed member */ );
+ ip0->checksum = ip_csum_fold (sum0);
+
+ if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
+ {
+ if (tcp0->flags & TCP_FLAG_FIN
+ && ses0->state == SNAT_SESSION_TCP_ESTABLISHED)
+ ses0->state = SNAT_SESSION_TCP_CLOSE_WAIT;
+ else if (tcp0->flags & TCP_FLAG_ACK
+ && ses0->state == SNAT_SESSION_TCP_LAST_ACK)
+ snat_det_ses_close (dm0, ses0);
+
+ old_port0 = tcp0->dst;
+ tcp0->dst = new_port0;
+
+ sum0 = tcp0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0.as_u32, new_addr0.as_u32,
+ ip4_header_t,
+ dst_address /* changed member */ );
+
+ sum0 = ip_csum_update (sum0, old_port0, new_port0,
+ ip4_header_t /* cheat */ ,
+ length /* changed member */ );
+ tcp0->checksum = ip_csum_fold (sum0);
+ }
+ else
+ {
+ old_port0 = udp0->dst_port;
+ udp0->dst_port = new_port0;
+ udp0->checksum = 0;
+ }
+
+ trace00:
+
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ nat_det_out2in_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->sw_if_index = sw_if_index0;
+ t->next_index = next0;
+ t->session_index = ~0;
+ if (ses0)
+ t->session_index = ses0 - dm0->sessions;
+ }
+
+ pkts_processed += next0 != NAT_DET_OUT2IN_NEXT_DROP;
+
+ /* verify speculative enqueue, maybe switch current next frame */
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
+ to_next, n_left_to_next,
+ bi0, next0);
+ }
+
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
+
+ vlib_node_increment_counter (vm, snat_det_out2in_node.index,
+ NAT_DET_OUT2IN_ERROR_OUT2IN_PACKETS,
+ pkts_processed);
+ return frame->n_vectors;
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (snat_det_out2in_node) = {
+ .function = snat_det_out2in_node_fn,
+ .name = "nat44-det-out2in",
+ .vector_size = sizeof (u32),
+ .format_trace = format_nat_det_out2in_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .n_errors = ARRAY_LEN(nat_det_out2in_error_strings),
+ .error_strings = nat_det_out2in_error_strings,
+ .runtime_data_bytes = sizeof (snat_runtime_t),
+ .n_next_nodes = NAT_DET_OUT2IN_N_NEXT,
+ /* edit / add dispositions here */
+ .next_nodes = {
+ [NAT_DET_OUT2IN_NEXT_DROP] = "error-drop",
+ [NAT_DET_OUT2IN_NEXT_LOOKUP] = "ip4-lookup",
+ [NAT_DET_OUT2IN_NEXT_ICMP_ERROR] = "ip4-icmp-error",
+ },
+};
+/* *INDENT-ON* */
+
+VLIB_NODE_FUNCTION_MULTIARCH (snat_det_out2in_node, snat_det_out2in_node_fn);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
--- /dev/null
+/*
+ * Copyright (c) 2018 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/**
+ * @file
+ * @brief NAT formatting
+ */
+
+#include <nat/nat.h>
+#include <nat/nat_det.h>
+
+uword
+unformat_snat_protocol (unformat_input_t * input, va_list * args)
+{
+ u32 *r = va_arg (*args, u32 *);
+
+ if (0);
+#define _(N, i, n, s) else if (unformat (input, s)) *r = SNAT_PROTOCOL_##N;
+ foreach_snat_protocol
+#undef _
+ else
+ return 0;
+ return 1;
+}
+
+u8 *
+format_snat_protocol (u8 * s, va_list * args)
+{
+ u32 i = va_arg (*args, u32);
+ u8 *t = 0;
+
+ switch (i)
+ {
+#define _(N, j, n, str) case SNAT_PROTOCOL_##N: t = (u8 *) str; break;
+ foreach_snat_protocol
+#undef _
+ default:
+ s = format (s, "unknown");
+ return s;
+ }
+ s = format (s, "%s", t);
+ return s;
+}
+
+u8 *
+format_nat_addr_and_port_alloc_alg (u8 * s, va_list * args)
+{
+ u32 i = va_arg (*args, u32);
+ u8 *t = 0;
+
+ switch (i)
+ {
+#define _(v, N, s) case NAT_ADDR_AND_PORT_ALLOC_ALG_##N: t = (u8 *) s; break;
+ foreach_nat_addr_and_port_alloc_alg
+#undef _
+ default:
+ s = format (s, "unknown");
+ return s;
+ }
+ s = format (s, "%s", t);
+ return s;
+}
+
+u8 *
+format_snat_key (u8 * s, va_list * args)
+{
+ snat_session_key_t *key = va_arg (*args, snat_session_key_t *);
+
+ s = format (s, "%U proto %U port %d fib %d",
+ format_ip4_address, &key->addr,
+ format_snat_protocol, key->protocol,
+ clib_net_to_host_u16 (key->port), key->fib_index);
+ return s;
+}
+
+u8 *
+format_static_mapping_key (u8 * s, va_list * args)
+{
+ snat_session_key_t *key = va_arg (*args, snat_session_key_t *);
+
+ s = format (s, "%U proto %U port %d fib %d",
+ format_ip4_address, &key->addr,
+ format_snat_protocol, key->protocol, key->port, key->fib_index);
+ return s;
+}
+
+u8 *
+format_snat_session_state (u8 * s, va_list * args)
+{
+ u32 i = va_arg (*args, u32);
+ u8 *t = 0;
+
+ switch (i)
+ {
+#define _(v, N, str) case SNAT_SESSION_##N: t = (u8 *) str; break;
+ foreach_snat_session_state
+#undef _
+ default:
+ t = format (t, "unknown");
+ }
+ s = format (s, "%s", t);
+ return s;
+}
+
+u8 *
+format_snat_session (u8 * s, va_list * args)
+{
+ snat_main_per_thread_data_t *sm =
+ va_arg (*args, snat_main_per_thread_data_t *);
+ snat_session_t *sess = va_arg (*args, snat_session_t *);
+
+ if (snat_is_unk_proto_session (sess))
+ {
+ s = format (s, " i2o %U proto %u fib %u\n",
+ format_ip4_address, &sess->in2out.addr,
+ clib_net_to_host_u16 (sess->in2out.port),
+ sess->in2out.fib_index);
+ s = format (s, " o2i %U proto %u fib %u\n",
+ format_ip4_address, &sess->out2in.addr,
+ clib_net_to_host_u16 (sess->out2in.port),
+ sess->out2in.fib_index);
+ }
+ else
+ {
+ s = format (s, " i2o %U\n", format_snat_key, &sess->in2out);
+ s = format (s, " o2i %U\n", format_snat_key, &sess->out2in);
+ }
+ if (is_ed_session (sess) || is_fwd_bypass_session (sess))
+ {
+ if (is_twice_nat_session (sess))
+ {
+ s = format (s, " external host o2i %U:%d i2o %U:%d\n",
+ format_ip4_address, &sess->ext_host_addr,
+ clib_net_to_host_u16 (sess->ext_host_port),
+ format_ip4_address, &sess->ext_host_nat_addr,
+ clib_net_to_host_u16 (sess->ext_host_nat_port));
+ }
+ else
+ {
+ if (sess->ext_host_addr.as_u32)
+ s = format (s, " external host %U:%u\n",
+ format_ip4_address, &sess->ext_host_addr,
+ clib_net_to_host_u16 (sess->ext_host_port));
+ }
+ }
+ s = format (s, " index %llu\n", sess - sm->sessions);
+ s = format (s, " last heard %.2f\n", sess->last_heard);
+ s = format (s, " total pkts %d, total bytes %lld\n",
+ sess->total_pkts, sess->total_bytes);
+ if (snat_is_session_static (sess))
+ s = format (s, " static translation\n");
+ else
+ s = format (s, " dynamic translation\n");
+ if (is_fwd_bypass_session (sess))
+ s = format (s, " forwarding-bypass\n");
+ if (is_lb_session (sess))
+ s = format (s, " load-balancing\n");
+ if (is_twice_nat_session (sess))
+ s = format (s, " twice-nat\n");
+
+ return s;
+}
+
+u8 *
+format_snat_user (u8 * s, va_list * args)
+{
+ snat_main_per_thread_data_t *sm =
+ va_arg (*args, snat_main_per_thread_data_t *);
+ snat_user_t *u = va_arg (*args, snat_user_t *);
+ int verbose = va_arg (*args, int);
+ dlist_elt_t *head, *elt;
+ u32 elt_index, head_index;
+ u32 session_index;
+ snat_session_t *sess;
+
+ s = format (s, "%U: %d dynamic translations, %d static translations\n",
+ format_ip4_address, &u->addr, u->nsessions, u->nstaticsessions);
+
+ if (verbose == 0)
+ return s;
+
+ if (u->nsessions || u->nstaticsessions)
+ {
+ head_index = u->sessions_per_user_list_head_index;
+ head = pool_elt_at_index (sm->list_pool, head_index);
+
+ elt_index = head->next;
+ elt = pool_elt_at_index (sm->list_pool, elt_index);
+ session_index = elt->value;
+
+ while (session_index != ~0)
+ {
+ sess = pool_elt_at_index (sm->sessions, session_index);
+
+ s = format (s, " %U\n", format_snat_session, sm, sess);
+
+ elt_index = elt->next;
+ elt = pool_elt_at_index (sm->list_pool, elt_index);
+ session_index = elt->value;
+ }
+ }
+
+ return s;
+}
+
+u8 *
+format_snat_static_mapping (u8 * s, va_list * args)
+{
+ snat_static_mapping_t *m = va_arg (*args, snat_static_mapping_t *);
+ nat44_lb_addr_port_t *local;
+
+ if (m->addr_only)
+ s = format (s, "local %U external %U vrf %d %s %s",
+ format_ip4_address, &m->local_addr,
+ format_ip4_address, &m->external_addr,
+ m->vrf_id,
+ m->twice_nat == TWICE_NAT ? "twice-nat" :
+ m->twice_nat == TWICE_NAT_SELF ? "self-twice-nat" : "",
+ m->out2in_only ? "out2in-only" : "");
+ else
+ {
+ if (vec_len (m->locals))
+ {
+ s = format (s, "%U external %U:%d %s %s",
+ format_snat_protocol, m->proto,
+ format_ip4_address, &m->external_addr, m->external_port,
+ m->twice_nat == TWICE_NAT ? "twice-nat" :
+ m->twice_nat == TWICE_NAT_SELF ? "self-twice-nat" : "",
+ m->out2in_only ? "out2in-only" : "");
+ vec_foreach (local, m->locals)
+ s = format (s, "\n local %U:%d vrf %d probability %d\%",
+ format_ip4_address, &local->addr, local->port,
+ local->vrf_id, local->probability);
+ }
+ else
+ s = format (s, "%U local %U:%d external %U:%d vrf %d %s %s",
+ format_snat_protocol, m->proto,
+ format_ip4_address, &m->local_addr, m->local_port,
+ format_ip4_address, &m->external_addr, m->external_port,
+ m->vrf_id,
+ m->twice_nat == TWICE_NAT ? "twice-nat" :
+ m->twice_nat == TWICE_NAT_SELF ? "self-twice-nat" : "",
+ m->out2in_only ? "out2in-only" : "");
+ }
+ return s;
+}
+
+u8 *
+format_snat_static_map_to_resolve (u8 * s, va_list * args)
+{
+ snat_static_map_resolve_t *m = va_arg (*args, snat_static_map_resolve_t *);
+ vnet_main_t *vnm = vnet_get_main ();
+
+ if (m->addr_only)
+ s = format (s, "local %U external %U vrf %d",
+ format_ip4_address, &m->l_addr,
+ format_vnet_sw_if_index_name, vnm, m->sw_if_index, m->vrf_id);
+ else
+ s = format (s, "%U local %U:%d external %U:%d vrf %d",
+ format_snat_protocol, m->proto,
+ format_ip4_address, &m->l_addr, m->l_port,
+ format_vnet_sw_if_index_name, vnm, m->sw_if_index,
+ m->e_port, m->vrf_id);
+
+ return s;
+}
+
+u8 *
+format_det_map_ses (u8 * s, va_list * args)
+{
+ snat_det_map_t *det_map = va_arg (*args, snat_det_map_t *);
+ ip4_address_t in_addr, out_addr;
+ u32 in_offset, out_offset;
+ snat_det_session_t *ses = va_arg (*args, snat_det_session_t *);
+ u32 *i = va_arg (*args, u32 *);
+
+ u32 user_index = *i / SNAT_DET_SES_PER_USER;
+ in_addr.as_u32 =
+ clib_host_to_net_u32 (clib_net_to_host_u32 (det_map->in_addr.as_u32) +
+ user_index);
+ in_offset =
+ clib_net_to_host_u32 (in_addr.as_u32) -
+ clib_net_to_host_u32 (det_map->in_addr.as_u32);
+ out_offset = in_offset / det_map->sharing_ratio;
+ out_addr.as_u32 =
+ clib_host_to_net_u32 (clib_net_to_host_u32 (det_map->out_addr.as_u32) +
+ out_offset);
+ s =
+ format (s,
+ "in %U:%d out %U:%d external host %U:%d state: %U expire: %d\n",
+ format_ip4_address, &in_addr, clib_net_to_host_u16 (ses->in_port),
+ format_ip4_address, &out_addr,
+ clib_net_to_host_u16 (ses->out.out_port), format_ip4_address,
+ &ses->out.ext_host_addr,
+ clib_net_to_host_u16 (ses->out.ext_host_port),
+ format_snat_session_state, ses->state, ses->expire);
+
+ return s;
+}
+
+u8 *
+format_nat44_reass_trace (u8 * s, va_list * args)
+{
+ CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
+ CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
+ nat44_reass_trace_t *t = va_arg (*args, nat44_reass_trace_t *);
+
+ s = format (s, "NAT44_REASS: sw_if_index %d, next index %d, status %s",
+ t->sw_if_index, t->next_index,
+ t->cached ? "cached" : "translated");
+
+ return s;
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
#ifndef __included_nat_inlines_h__
#define __included_nat_inlines_h__
+#include <vnet/fib/ip4_fib.h>
#include <nat/nat.h>
always_inline u32
}
}
+/**
+ * @brief Check if packet should be translated
+ *
+ * Packets aimed at outside interface and external address with active session
+ * should be translated.
+ *
+ * @param sm NAT main
+ * @param rt NAT runtime data
+ * @param sw_if_index0 index of the inside interface
+ * @param ip0 IPv4 header
+ * @param proto0 NAT protocol
+ * @param rx_fib_index0 RX FIB index
+ *
+ * @returns 0 if packet should be translated otherwise 1
+ */
+static inline int
+snat_not_translate_fast (snat_main_t * sm, vlib_node_runtime_t * node,
+ u32 sw_if_index0, ip4_header_t * ip0, u32 proto0,
+ u32 rx_fib_index0)
+{
+ if (sm->out2in_dpo)
+ return 0;
+
+ fib_node_index_t fei = FIB_NODE_INDEX_INVALID;
+ nat_outside_fib_t *outside_fib;
+ fib_prefix_t pfx = {
+ .fp_proto = FIB_PROTOCOL_IP4,
+ .fp_len = 32,
+ .fp_addr = {
+ .ip4.as_u32 = ip0->dst_address.as_u32,
+ }
+ ,
+ };
+
+ /* Don't NAT packet aimed at the intfc address */
+ if (PREDICT_FALSE (is_interface_addr (sm, node, sw_if_index0,
+ ip0->dst_address.as_u32)))
+ return 1;
+
+ fei = fib_table_lookup (rx_fib_index0, &pfx);
+ if (FIB_NODE_INDEX_INVALID != fei)
+ {
+ u32 sw_if_index = fib_entry_get_resolving_interface (fei);
+ if (sw_if_index == ~0)
+ {
+ vec_foreach (outside_fib, sm->outside_fibs)
+ {
+ fei = fib_table_lookup (outside_fib->fib_index, &pfx);
+ if (FIB_NODE_INDEX_INVALID != fei)
+ {
+ sw_if_index = fib_entry_get_resolving_interface (fei);
+ if (sw_if_index != ~0)
+ break;
+ }
+ }
+ }
+ if (sw_if_index == ~0)
+ return 1;
+
+ snat_interface_t *i;
+ pool_foreach (i, sm->interfaces, (
+ {
+ /* NAT packet aimed at outside interface */
+ if ((nat_interface_is_outside (i))
+ && (sw_if_index ==
+ i->sw_if_index)) return 0;}
+ ));
+ }
+
+ return 1;
+}
+
#endif /* __included_nat_inlines_h__ */
/*
* See the License for the specific language governing permissions and
* limitations under the License.
*/
+/**
+ * @file
+ * @brief NAT44 endpoint-dependent outside to inside network translation
+ */
#include <vlib/vlib.h>
#include <vnet/vnet.h>
#include <vnet/pg/pg.h>
-#include <vnet/handoff.h>
#include <vnet/ip/ip.h>
#include <vnet/udp/udp.h>
#include <vnet/fib/ip4_fib.h>
#include <nat/nat.h>
#include <nat/nat_ipfix_logging.h>
-#include <nat/nat_det.h>
#include <nat/nat_reass.h>
#include <nat/nat_inlines.h>
#include <vppinfra/error.h>
#include <vppinfra/elog.h>
-typedef struct {
+typedef struct
+{
u32 sw_if_index;
u32 next_index;
u32 session_index;
} snat_out2in_trace_t;
-typedef struct {
- u32 next_worker_index;
- u8 do_handoff;
-} snat_out2in_worker_handoff_trace_t;
-
/* packet trace format function */
-static u8 * format_snat_out2in_trace (u8 * s, va_list * args)
+static u8 *
+format_snat_out2in_trace (u8 * s, va_list * args)
{
CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
- snat_out2in_trace_t * t = va_arg (*args, snat_out2in_trace_t *);
+ snat_out2in_trace_t *t = va_arg (*args, snat_out2in_trace_t *);
- s = format (s, "NAT44_OUT2IN: sw_if_index %d, next index %d, session index %d",
- t->sw_if_index, t->next_index, t->session_index);
+ s =
+ format (s,
+ "NAT44_OUT2IN: sw_if_index %d, next index %d, session index %d",
+ t->sw_if_index, t->next_index, t->session_index);
return s;
}
-static u8 * format_snat_out2in_fast_trace (u8 * s, va_list * args)
+static u8 *
+format_snat_out2in_fast_trace (u8 * s, va_list * args)
{
CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
- snat_out2in_trace_t * t = va_arg (*args, snat_out2in_trace_t *);
+ snat_out2in_trace_t *t = va_arg (*args, snat_out2in_trace_t *);
s = format (s, "NAT44_OUT2IN_FAST: sw_if_index %d, next index %d",
- t->sw_if_index, t->next_index);
- return s;
-}
-
-static u8 * format_snat_out2in_worker_handoff_trace (u8 * s, va_list * args)
-{
- CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
- CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
- snat_out2in_worker_handoff_trace_t * t =
- va_arg (*args, snat_out2in_worker_handoff_trace_t *);
- char * m;
-
- m = t->do_handoff ? "next worker" : "same worker";
- s = format (s, "NAT44_OUT2IN_WORKER_HANDOFF: %s %d", m, t->next_worker_index);
-
- return s;
-}
-
-typedef struct {
- u32 sw_if_index;
- u32 next_index;
- u8 cached;
-} nat44_out2in_reass_trace_t;
-
-static u8 * format_nat44_out2in_reass_trace (u8 * s, va_list * args)
-{
- CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
- CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
- nat44_out2in_reass_trace_t * t = va_arg (*args, nat44_out2in_reass_trace_t *);
-
- s = format (s, "NAT44_OUT2IN_REASS: sw_if_index %d, next index %d, status %s",
- t->sw_if_index, t->next_index,
- t->cached ? "cached" : "translated");
-
+ t->sw_if_index, t->next_index);
return s;
}
vlib_node_registration_t snat_out2in_node;
vlib_node_registration_t snat_out2in_fast_node;
-vlib_node_registration_t snat_out2in_worker_handoff_node;
-vlib_node_registration_t snat_det_out2in_node;
vlib_node_registration_t nat44_out2in_reass_node;
-vlib_node_registration_t nat44_ed_out2in_node;
-vlib_node_registration_t nat44_ed_out2in_slowpath_node;
-vlib_node_registration_t nat44_ed_out2in_reass_node;
#define foreach_snat_out2in_error \
_(UNSUPPORTED_PROTOCOL, "Unsupported protocol") \
_(MAX_SESSIONS_EXCEEDED, "Maximum sessions exceeded") \
_(DROP_FRAGMENT, "Drop fragment") \
_(MAX_REASS, "Maximum reassemblies exceeded") \
-_(MAX_FRAG, "Maximum fragments per reassembly exceeded")\
-_(FQ_CONGESTED, "Handoff frame queue congested")
+_(MAX_FRAG, "Maximum fragments per reassembly exceeded")
-typedef enum {
+typedef enum
+{
#define _(sym,str) SNAT_OUT2IN_ERROR_##sym,
foreach_snat_out2in_error
#undef _
- SNAT_OUT2IN_N_ERROR,
+ SNAT_OUT2IN_N_ERROR,
} snat_out2in_error_t;
-static char * snat_out2in_error_strings[] = {
+static char *snat_out2in_error_strings[] = {
#define _(sym,string) string,
foreach_snat_out2in_error
#undef _
};
-typedef enum {
+typedef enum
+{
SNAT_OUT2IN_NEXT_DROP,
SNAT_OUT2IN_NEXT_LOOKUP,
SNAT_OUT2IN_NEXT_ICMP_ERROR,
} snat_out2in_next_t;
int
-nat44_o2i_is_idle_session_cb (clib_bihash_kv_8_8_t * kv, void * arg)
+nat44_o2i_is_idle_session_cb (clib_bihash_kv_8_8_t * kv, void *arg)
{
snat_main_t *sm = &snat_main;
nat44_is_idle_session_ctx_t *ctx = arg;
snat_session_t *s;
u64 sess_timeout_time;
snat_main_per_thread_data_t *tsm = vec_elt_at_index (sm->per_thread_data,
- ctx->thread_index);
+ ctx->thread_index);
clib_bihash_kv_8_8_t s_kv;
s = pool_elt_at_index (tsm->sessions, kv->value);
- sess_timeout_time = s->last_heard + (f64)nat44_session_get_timeout(sm, s);
+ sess_timeout_time = s->last_heard + (f64) nat44_session_get_timeout (sm, s);
if (ctx->now >= sess_timeout_time)
{
s_kv.key = s->in2out.as_u64;
if (clib_bihash_add_del_8_8 (&tsm->in2out, &s_kv, 0))
- nat_log_warn ("out2in key del failed");
+ nat_log_warn ("out2in key del failed");
- snat_ipfix_logging_nat44_ses_delete(s->in2out.addr.as_u32,
- s->out2in.addr.as_u32,
- s->in2out.protocol,
- s->in2out.port,
- s->out2in.port,
- s->in2out.fib_index);
+ snat_ipfix_logging_nat44_ses_delete (s->in2out.addr.as_u32,
+ s->out2in.addr.as_u32,
+ s->in2out.protocol,
+ s->in2out.port,
+ s->out2in.port,
+ s->in2out.fib_index);
if (!snat_is_session_static (s))
- snat_free_outside_address_and_port (sm->addresses, ctx->thread_index,
- &s->out2in);
+ snat_free_outside_address_and_port (sm->addresses, ctx->thread_index,
+ &s->out2in);
nat44_delete_session (sm, s, ctx->thread_index);
return 1;
* @returns SNAT session if successfully created otherwise 0.
*/
static inline snat_session_t *
-create_session_for_static_mapping (snat_main_t *sm,
- vlib_buffer_t *b0,
- snat_session_key_t in2out,
- snat_session_key_t out2in,
- vlib_node_runtime_t * node,
- u32 thread_index,
- f64 now)
+create_session_for_static_mapping (snat_main_t * sm,
+ vlib_buffer_t * b0,
+ snat_session_key_t in2out,
+ snat_session_key_t out2in,
+ vlib_node_runtime_t * node,
+ u32 thread_index, f64 now)
{
snat_user_t *u;
snat_session_t *s;
udp_header_t *udp0;
nat44_is_idle_session_ctx_t ctx0;
- if (PREDICT_FALSE (maximum_sessions_exceeded(sm, thread_index)))
+ if (PREDICT_FALSE (maximum_sessions_exceeded (sm, thread_index)))
{
b0->error = node->errors[SNAT_OUT2IN_ERROR_MAX_SESSIONS_EXCEEDED];
nat_log_notice ("maximum sessions exceeded");
ip0 = vlib_buffer_get_current (b0);
udp0 = ip4_next_header (ip0);
- u = nat_user_get_or_create (sm, &in2out.addr, in2out.fib_index, thread_index);
+ u =
+ nat_user_get_or_create (sm, &in2out.addr, in2out.fib_index, thread_index);
if (!u)
{
nat_log_warn ("create NAT user failed");
return 0;
}
- s->outside_address_index = ~0;
s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING;
s->ext_host_addr.as_u32 = ip0->src_address.as_u32;
s->ext_host_port = udp0->src_port;
- user_session_increment (sm, u, 1 /* static */);
+ user_session_increment (sm, u, 1 /* static */ );
s->in2out = in2out;
s->out2in = out2in;
s->in2out.protocol = out2in.protocol;
ctx0.thread_index = thread_index;
kv0.key = s->in2out.as_u64;
kv0.value = s - sm->per_thread_data[thread_index].sessions;
- if (clib_bihash_add_or_overwrite_stale_8_8 (
- &sm->per_thread_data[thread_index].in2out, &kv0,
+ if (clib_bihash_add_or_overwrite_stale_8_8
+ (&sm->per_thread_data[thread_index].in2out, &kv0,
nat44_i2o_is_idle_session_cb, &ctx0))
- nat_log_notice ("in2out key add failed");
+ nat_log_notice ("in2out key add failed");
kv0.key = s->out2in.as_u64;
- if (clib_bihash_add_or_overwrite_stale_8_8 (
- &sm->per_thread_data[thread_index].out2in, &kv0,
- nat44_o2i_is_idle_session_cb, &ctx0))
- nat_log_notice ("out2in key add failed");
+ if (clib_bihash_add_or_overwrite_stale_8_8
+ (&sm->per_thread_data[thread_index].out2in, &kv0,
+ nat44_o2i_is_idle_session_cb, &ctx0))
+ nat_log_notice ("out2in key add failed");
/* log NAT event */
- snat_ipfix_logging_nat44_ses_create(s->in2out.addr.as_u32,
- s->out2in.addr.as_u32,
- s->in2out.protocol,
- s->in2out.port,
- s->out2in.port,
- s->in2out.fib_index);
+ snat_ipfix_logging_nat44_ses_create (s->in2out.addr.as_u32,
+ s->out2in.addr.as_u32,
+ s->in2out.protocol,
+ s->in2out.port,
+ s->out2in.port, s->in2out.fib_index);
return s;
}
static_always_inline
-snat_out2in_error_t icmp_get_key(ip4_header_t *ip0,
- snat_session_key_t *p_key0)
+ snat_out2in_error_t icmp_get_key (ip4_header_t * ip0,
+ snat_session_key_t * p_key0)
{
icmp46_header_t *icmp0;
snat_session_key_t key0;
icmp46_header_t *inner_icmp0;
icmp0 = (icmp46_header_t *) ip4_next_header (ip0);
- echo0 = (icmp_echo_header_t *)(icmp0+1);
+ echo0 = (icmp_echo_header_t *) (icmp0 + 1);
if (!icmp_is_error_message (icmp0))
{
}
else
{
- inner_ip0 = (ip4_header_t *)(echo0+1);
+ inner_ip0 = (ip4_header_t *) (echo0 + 1);
l4_header = ip4_next_header (inner_ip0);
key0.protocol = ip_proto_to_snat_proto (inner_ip0->protocol);
key0.addr = inner_ip0->src_address;
switch (key0.protocol)
- {
- case SNAT_PROTOCOL_ICMP:
- inner_icmp0 = (icmp46_header_t*)l4_header;
- inner_echo0 = (icmp_echo_header_t *)(inner_icmp0+1);
- key0.port = inner_echo0->identifier;
- break;
- case SNAT_PROTOCOL_UDP:
- case SNAT_PROTOCOL_TCP:
- key0.port = ((tcp_udp_header_t*)l4_header)->src_port;
- break;
- default:
- return SNAT_OUT2IN_ERROR_UNSUPPORTED_PROTOCOL;
- }
+ {
+ case SNAT_PROTOCOL_ICMP:
+ inner_icmp0 = (icmp46_header_t *) l4_header;
+ inner_echo0 = (icmp_echo_header_t *) (inner_icmp0 + 1);
+ key0.port = inner_echo0->identifier;
+ break;
+ case SNAT_PROTOCOL_UDP:
+ case SNAT_PROTOCOL_TCP:
+ key0.port = ((tcp_udp_header_t *) l4_header)->src_port;
+ break;
+ default:
+ return SNAT_OUT2IN_ERROR_UNSUPPORTED_PROTOCOL;
+ }
}
*p_key0 = key0;
- return -1; /* success */
+ return -1; /* success */
}
/**
* @param d optional parameter
* @param e optional parameter
*/
-u32 icmp_match_out2in_slow(snat_main_t *sm, vlib_node_runtime_t *node,
- u32 thread_index, vlib_buffer_t *b0,
- ip4_header_t *ip0, u8 *p_proto,
- snat_session_key_t *p_value,
- u8 *p_dont_translate, void *d, void *e)
+u32
+icmp_match_out2in_slow (snat_main_t * sm, vlib_node_runtime_t * node,
+ u32 thread_index, vlib_buffer_t * b0,
+ ip4_header_t * ip0, u8 * p_proto,
+ snat_session_key_t * p_value,
+ u8 * p_dont_translate, void *d, void *e)
{
icmp46_header_t *icmp0;
u32 sw_if_index0;
int err;
icmp0 = (icmp46_header_t *) ip4_next_header (ip0);
- sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
rx_fib_index0 = ip4_fib_table_get_index_for_sw_if_index (sw_if_index0);
key0.protocol = 0;
kv0.key = key0.as_u64;
if (clib_bihash_search_8_8 (&sm->per_thread_data[thread_index].out2in, &kv0,
- &value0))
+ &value0))
{
/* Try to match static mapping by external address and port,
destination address and port in packet */
- if (snat_static_mapping_match(sm, key0, &sm0, 1, &is_addr_only, 0, 0, 0))
- {
- if (!sm->forwarding_enabled)
- {
- /* Don't NAT packet aimed at the intfc address */
- if (PREDICT_FALSE(is_interface_addr(sm, node, sw_if_index0,
- ip0->dst_address.as_u32)))
- {
- dont_translate = 1;
- goto out;
- }
- b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
- next0 = SNAT_OUT2IN_NEXT_DROP;
- goto out;
- }
- else
- {
- dont_translate = 1;
- goto out;
- }
- }
-
- if (PREDICT_FALSE(icmp0->type != ICMP4_echo_reply &&
- (icmp0->type != ICMP4_echo_request || !is_addr_only)))
- {
- b0->error = node->errors[SNAT_OUT2IN_ERROR_BAD_ICMP_TYPE];
- next0 = SNAT_OUT2IN_NEXT_DROP;
- goto out;
- }
+ if (snat_static_mapping_match
+ (sm, key0, &sm0, 1, &is_addr_only, 0, 0, 0))
+ {
+ if (!sm->forwarding_enabled)
+ {
+ /* Don't NAT packet aimed at the intfc address */
+ if (PREDICT_FALSE (is_interface_addr (sm, node, sw_if_index0,
+ ip0->dst_address.as_u32)))
+ {
+ dont_translate = 1;
+ goto out;
+ }
+ b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
+ next0 = SNAT_OUT2IN_NEXT_DROP;
+ goto out;
+ }
+ else
+ {
+ dont_translate = 1;
+ goto out;
+ }
+ }
+
+ if (PREDICT_FALSE (icmp0->type != ICMP4_echo_reply &&
+ (icmp0->type != ICMP4_echo_request
+ || !is_addr_only)))
+ {
+ b0->error = node->errors[SNAT_OUT2IN_ERROR_BAD_ICMP_TYPE];
+ next0 = SNAT_OUT2IN_NEXT_DROP;
+ goto out;
+ }
/* Create session initiated by host from external network */
- s0 = create_session_for_static_mapping(sm, b0, sm0, key0,
- node, thread_index,
- vlib_time_now (sm->vlib_main));
+ s0 = create_session_for_static_mapping (sm, b0, sm0, key0,
+ node, thread_index,
+ vlib_time_now (sm->vlib_main));
if (!s0)
- {
- next0 = SNAT_OUT2IN_NEXT_DROP;
- goto out;
- }
+ {
+ next0 = SNAT_OUT2IN_NEXT_DROP;
+ goto out;
+ }
}
else
{
- if (PREDICT_FALSE(icmp0->type != ICMP4_echo_reply &&
- icmp0->type != ICMP4_echo_request &&
- !icmp_is_error_message (icmp0)))
- {
- b0->error = node->errors[SNAT_OUT2IN_ERROR_BAD_ICMP_TYPE];
- next0 = SNAT_OUT2IN_NEXT_DROP;
- goto out;
- }
+ if (PREDICT_FALSE (icmp0->type != ICMP4_echo_reply &&
+ icmp0->type != ICMP4_echo_request &&
+ !icmp_is_error_message (icmp0)))
+ {
+ b0->error = node->errors[SNAT_OUT2IN_ERROR_BAD_ICMP_TYPE];
+ next0 = SNAT_OUT2IN_NEXT_DROP;
+ goto out;
+ }
s0 = pool_elt_at_index (sm->per_thread_data[thread_index].sessions,
- value0.value);
+ value0.value);
}
out:
*p_value = s0->in2out;
*p_dont_translate = dont_translate;
if (d)
- *(snat_session_t**)d = s0;
+ *(snat_session_t **) d = s0;
return next0;
}
* @param d optional parameter
* @param e optional parameter
*/
-u32 icmp_match_out2in_fast(snat_main_t *sm, vlib_node_runtime_t *node,
- u32 thread_index, vlib_buffer_t *b0,
- ip4_header_t *ip0, u8 *p_proto,
- snat_session_key_t *p_value,
- u8 *p_dont_translate, void *d, void *e)
+u32
+icmp_match_out2in_fast (snat_main_t * sm, vlib_node_runtime_t * node,
+ u32 thread_index, vlib_buffer_t * b0,
+ ip4_header_t * ip0, u8 * p_proto,
+ snat_session_key_t * p_value,
+ u8 * p_dont_translate, void *d, void *e)
{
icmp46_header_t *icmp0;
u32 sw_if_index0;
int err;
icmp0 = (icmp46_header_t *) ip4_next_header (ip0);
- sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
rx_fib_index0 = ip4_fib_table_get_index_for_sw_if_index (sw_if_index0);
err = icmp_get_key (ip0, &key0);
}
key0.fib_index = rx_fib_index0;
- if (snat_static_mapping_match(sm, key0, &sm0, 1, &is_addr_only, 0, 0, 0))
+ if (snat_static_mapping_match (sm, key0, &sm0, 1, &is_addr_only, 0, 0, 0))
{
/* Don't NAT packet aimed at the intfc address */
- if (is_interface_addr(sm, node, sw_if_index0, ip0->dst_address.as_u32))
- {
- dont_translate = 1;
- goto out;
- }
+ if (is_interface_addr (sm, node, sw_if_index0, ip0->dst_address.as_u32))
+ {
+ dont_translate = 1;
+ goto out;
+ }
b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
next0 = SNAT_OUT2IN_NEXT_DROP;
goto out;
}
- if (PREDICT_FALSE(icmp0->type != ICMP4_echo_reply &&
- (icmp0->type != ICMP4_echo_request || !is_addr_only) &&
- !icmp_is_error_message (icmp0)))
+ if (PREDICT_FALSE (icmp0->type != ICMP4_echo_reply &&
+ (icmp0->type != ICMP4_echo_request || !is_addr_only) &&
+ !icmp_is_error_message (icmp0)))
{
b0->error = node->errors[SNAT_OUT2IN_ERROR_BAD_ICMP_TYPE];
next0 = SNAT_OUT2IN_NEXT_DROP;
return next0;
}
-static inline u32 icmp_out2in (snat_main_t *sm,
- vlib_buffer_t * b0,
- ip4_header_t * ip0,
- icmp46_header_t * icmp0,
- u32 sw_if_index0,
- u32 rx_fib_index0,
- vlib_node_runtime_t * node,
- u32 next0,
- u32 thread_index,
- void *d,
- void *e)
+u32
+icmp_out2in (snat_main_t * sm,
+ vlib_buffer_t * b0,
+ ip4_header_t * ip0,
+ icmp46_header_t * icmp0,
+ u32 sw_if_index0,
+ u32 rx_fib_index0,
+ vlib_node_runtime_t * node,
+ u32 next0, u32 thread_index, void *d, void *e)
{
snat_session_key_t sm0;
u8 protocol;
u16 checksum0;
u32 next0_tmp;
- echo0 = (icmp_echo_header_t *)(icmp0+1);
+ echo0 = (icmp_echo_header_t *) (icmp0 + 1);
- next0_tmp = sm->icmp_match_out2in_cb(sm, node, thread_index, b0, ip0,
- &protocol, &sm0, &dont_translate, d, e);
+ next0_tmp = sm->icmp_match_out2in_cb (sm, node, thread_index, b0, ip0,
+ &protocol, &sm0, &dont_translate, d,
+ e);
if (next0_tmp != ~0)
next0 = next0_tmp;
if (next0 == SNAT_OUT2IN_NEXT_DROP || dont_translate)
if (PREDICT_TRUE (!ip4_is_fragment (ip0)))
{
sum0 = ip_incremental_checksum (0, icmp0,
- ntohs(ip0->length) - ip4_header_bytes (ip0));
+ ntohs (ip0->length) -
+ ip4_header_bytes (ip0));
checksum0 = ~ip_csum_fold (sum0);
if (checksum0 != 0 && checksum0 != 0xffff)
- {
- next0 = SNAT_OUT2IN_NEXT_DROP;
- goto out;
- }
+ {
+ next0 = SNAT_OUT2IN_NEXT_DROP;
+ goto out;
+ }
}
old_addr0 = ip0->dst_address.as_u32;
new_addr0 = ip0->dst_address.as_u32 = sm0.addr.as_u32;
- vnet_buffer(b0)->sw_if_index[VLIB_TX] = sm0.fib_index;
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = sm0.fib_index;
sum0 = ip0->checksum;
sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
- dst_address /* changed member */);
+ dst_address /* changed member */ );
ip0->checksum = ip_csum_fold (sum0);
if (icmp0->checksum == 0)
if (!icmp_is_error_message (icmp0))
{
new_id0 = sm0.port;
- if (PREDICT_FALSE(new_id0 != echo0->identifier))
- {
- old_id0 = echo0->identifier;
- new_id0 = sm0.port;
- echo0->identifier = new_id0;
-
- sum0 = icmp0->checksum;
- sum0 = ip_csum_update (sum0, old_id0, new_id0, icmp_echo_header_t,
- identifier /* changed member */);
- icmp0->checksum = ip_csum_fold (sum0);
- }
+ if (PREDICT_FALSE (new_id0 != echo0->identifier))
+ {
+ old_id0 = echo0->identifier;
+ new_id0 = sm0.port;
+ echo0->identifier = new_id0;
+
+ sum0 = icmp0->checksum;
+ sum0 = ip_csum_update (sum0, old_id0, new_id0, icmp_echo_header_t,
+ identifier /* changed member */ );
+ icmp0->checksum = ip_csum_fold (sum0);
+ }
}
else
{
- inner_ip0 = (ip4_header_t *)(echo0+1);
+ inner_ip0 = (ip4_header_t *) (echo0 + 1);
l4_header = ip4_next_header (inner_ip0);
if (!ip4_header_checksum_is_valid (inner_ip0))
- {
- next0 = SNAT_OUT2IN_NEXT_DROP;
- goto out;
- }
+ {
+ next0 = SNAT_OUT2IN_NEXT_DROP;
+ goto out;
+ }
old_addr0 = inner_ip0->src_address.as_u32;
inner_ip0->src_address = sm0.addr;
sum0 = icmp0->checksum;
sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
- src_address /* changed member */);
+ src_address /* changed member */ );
icmp0->checksum = ip_csum_fold (sum0);
switch (protocol)
- {
- case SNAT_PROTOCOL_ICMP:
- inner_icmp0 = (icmp46_header_t*)l4_header;
- inner_echo0 = (icmp_echo_header_t *)(inner_icmp0+1);
-
- old_id0 = inner_echo0->identifier;
- new_id0 = sm0.port;
- inner_echo0->identifier = new_id0;
-
- sum0 = icmp0->checksum;
- sum0 = ip_csum_update (sum0, old_id0, new_id0, icmp_echo_header_t,
- identifier);
- icmp0->checksum = ip_csum_fold (sum0);
- break;
- case SNAT_PROTOCOL_UDP:
- case SNAT_PROTOCOL_TCP:
- old_id0 = ((tcp_udp_header_t*)l4_header)->src_port;
- new_id0 = sm0.port;
- ((tcp_udp_header_t*)l4_header)->src_port = new_id0;
-
- sum0 = icmp0->checksum;
- sum0 = ip_csum_update (sum0, old_id0, new_id0, tcp_udp_header_t,
- src_port);
- icmp0->checksum = ip_csum_fold (sum0);
- break;
- default:
- ASSERT(0);
- }
+ {
+ case SNAT_PROTOCOL_ICMP:
+ inner_icmp0 = (icmp46_header_t *) l4_header;
+ inner_echo0 = (icmp_echo_header_t *) (inner_icmp0 + 1);
+
+ old_id0 = inner_echo0->identifier;
+ new_id0 = sm0.port;
+ inner_echo0->identifier = new_id0;
+
+ sum0 = icmp0->checksum;
+ sum0 = ip_csum_update (sum0, old_id0, new_id0, icmp_echo_header_t,
+ identifier);
+ icmp0->checksum = ip_csum_fold (sum0);
+ break;
+ case SNAT_PROTOCOL_UDP:
+ case SNAT_PROTOCOL_TCP:
+ old_id0 = ((tcp_udp_header_t *) l4_header)->src_port;
+ new_id0 = sm0.port;
+ ((tcp_udp_header_t *) l4_header)->src_port = new_id0;
+
+ sum0 = icmp0->checksum;
+ sum0 = ip_csum_update (sum0, old_id0, new_id0, tcp_udp_header_t,
+ src_port);
+ icmp0->checksum = ip_csum_fold (sum0);
+ break;
+ default:
+ ASSERT (0);
+ }
}
out:
}
-static inline u32 icmp_out2in_slow_path (snat_main_t *sm,
- vlib_buffer_t * b0,
- ip4_header_t * ip0,
- icmp46_header_t * icmp0,
- u32 sw_if_index0,
- u32 rx_fib_index0,
- vlib_node_runtime_t * node,
- u32 next0, f64 now,
- u32 thread_index,
- snat_session_t ** p_s0)
+static inline u32
+icmp_out2in_slow_path (snat_main_t * sm,
+ vlib_buffer_t * b0,
+ ip4_header_t * ip0,
+ icmp46_header_t * icmp0,
+ u32 sw_if_index0,
+ u32 rx_fib_index0,
+ vlib_node_runtime_t * node,
+ u32 next0, f64 now,
+ u32 thread_index, snat_session_t ** p_s0)
{
- next0 = icmp_out2in(sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
- next0, thread_index, p_s0, 0);
- snat_session_t * s0 = *p_s0;
- if (PREDICT_TRUE(next0 != SNAT_OUT2IN_NEXT_DROP && s0))
+ next0 = icmp_out2in (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
+ next0, thread_index, p_s0, 0);
+ snat_session_t *s0 = *p_s0;
+ if (PREDICT_TRUE (next0 != SNAT_OUT2IN_NEXT_DROP && s0))
{
/* Accounting */
nat44_session_update_counters (s0, now,
- vlib_buffer_length_in_chain (sm->vlib_main, b0));
+ vlib_buffer_length_in_chain
+ (sm->vlib_main, b0));
/* Per-user LRU list maintenance */
nat44_session_update_lru (sm, s0, thread_index);
}
}
static int
-nat_out2in_sm_unknown_proto (snat_main_t *sm,
- vlib_buffer_t * b,
- ip4_header_t * ip,
- u32 rx_fib_index)
+nat_out2in_sm_unknown_proto (snat_main_t * sm,
+ vlib_buffer_t * b,
+ ip4_header_t * ip, u32 rx_fib_index)
{
clib_bihash_kv_8_8_t kv, value;
snat_static_mapping_t *m;
sum = ip_csum_update (sum, old_addr, new_addr, ip4_header_t, dst_address);
ip->checksum = ip_csum_fold (sum);
- vnet_buffer(b)->sw_if_index[VLIB_TX] = m->fib_index;
+ vnet_buffer (b)->sw_if_index[VLIB_TX] = m->fib_index;
return 0;
}
static uword
snat_out2in_node_fn (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
+ vlib_node_runtime_t * node, vlib_frame_t * frame)
{
- u32 n_left_from, * from, * to_next;
+ u32 n_left_from, *from, *to_next;
snat_out2in_next_t next_index;
u32 pkts_processed = 0;
- snat_main_t * sm = &snat_main;
+ snat_main_t *sm = &snat_main;
f64 now = vlib_time_now (vm);
u32 thread_index = vm->thread_index;
{
u32 n_left_to_next;
- vlib_get_next_frame (vm, node, next_index,
- to_next, n_left_to_next);
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
while (n_left_from >= 4 && n_left_to_next >= 2)
{
- u32 bi0, bi1;
- vlib_buffer_t * b0, * b1;
- u32 next0 = SNAT_OUT2IN_NEXT_LOOKUP;
- u32 next1 = SNAT_OUT2IN_NEXT_LOOKUP;
- u32 sw_if_index0, sw_if_index1;
- ip4_header_t * ip0, *ip1;
- ip_csum_t sum0, sum1;
- u32 new_addr0, old_addr0;
- u16 new_port0, old_port0;
- u32 new_addr1, old_addr1;
- u16 new_port1, old_port1;
- udp_header_t * udp0, * udp1;
- tcp_header_t * tcp0, * tcp1;
- icmp46_header_t * icmp0, * icmp1;
- snat_session_key_t key0, key1, sm0, sm1;
- u32 rx_fib_index0, rx_fib_index1;
- u32 proto0, proto1;
- snat_session_t * s0 = 0, * s1 = 0;
- clib_bihash_kv_8_8_t kv0, kv1, value0, value1;
+ u32 bi0, bi1;
+ vlib_buffer_t *b0, *b1;
+ u32 next0 = SNAT_OUT2IN_NEXT_LOOKUP;
+ u32 next1 = SNAT_OUT2IN_NEXT_LOOKUP;
+ u32 sw_if_index0, sw_if_index1;
+ ip4_header_t *ip0, *ip1;
+ ip_csum_t sum0, sum1;
+ u32 new_addr0, old_addr0;
+ u16 new_port0, old_port0;
+ u32 new_addr1, old_addr1;
+ u16 new_port1, old_port1;
+ udp_header_t *udp0, *udp1;
+ tcp_header_t *tcp0, *tcp1;
+ icmp46_header_t *icmp0, *icmp1;
+ snat_session_key_t key0, key1, sm0, sm1;
+ u32 rx_fib_index0, rx_fib_index1;
+ u32 proto0, proto1;
+ snat_session_t *s0 = 0, *s1 = 0;
+ clib_bihash_kv_8_8_t kv0, kv1, value0, value1;
/* Prefetch next iteration. */
{
- vlib_buffer_t * p2, * p3;
+ vlib_buffer_t *p2, *p3;
p2 = vlib_get_buffer (vm, from[2]);
p3 = vlib_get_buffer (vm, from[3]);
CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, STORE);
}
- /* speculatively enqueue b0 and b1 to the current next frame */
+ /* speculatively enqueue b0 and b1 to the current next frame */
to_next[0] = bi0 = from[0];
to_next[1] = bi1 = from[1];
from += 2;
b0 = vlib_get_buffer (vm, bi0);
b1 = vlib_get_buffer (vm, bi1);
- vnet_buffer (b0)->snat.flags = 0;
- vnet_buffer (b1)->snat.flags = 0;
+ vnet_buffer (b0)->snat.flags = 0;
+ vnet_buffer (b1)->snat.flags = 0;
- ip0 = vlib_buffer_get_current (b0);
- udp0 = ip4_next_header (ip0);
- tcp0 = (tcp_header_t *) udp0;
- icmp0 = (icmp46_header_t *) udp0;
+ ip0 = vlib_buffer_get_current (b0);
+ udp0 = ip4_next_header (ip0);
+ tcp0 = (tcp_header_t *) udp0;
+ icmp0 = (icmp46_header_t *) udp0;
- sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
rx_fib_index0 = vec_elt (sm->ip4_main->fib_index_by_sw_if_index,
- sw_if_index0);
-
- if (PREDICT_FALSE(ip0->ttl == 1))
- {
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
- icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
- ICMP4_time_exceeded_ttl_exceeded_in_transit,
- 0);
- next0 = SNAT_OUT2IN_NEXT_ICMP_ERROR;
- goto trace0;
- }
-
- proto0 = ip_proto_to_snat_proto (ip0->protocol);
-
- if (PREDICT_FALSE (proto0 == ~0))
- {
- if (nat_out2in_sm_unknown_proto(sm, b0, ip0, rx_fib_index0))
- {
- if (!sm->forwarding_enabled)
- {
- b0->error = node->errors[SNAT_OUT2IN_ERROR_UNSUPPORTED_PROTOCOL];
- next0 = SNAT_OUT2IN_NEXT_DROP;
- }
- }
- goto trace0;
- }
-
- if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
- {
- next0 = icmp_out2in_slow_path
- (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
- next0, now, thread_index, &s0);
- goto trace0;
- }
-
- if (PREDICT_FALSE (ip4_is_fragment (ip0)))
- {
- next0 = SNAT_OUT2IN_NEXT_REASS;
- goto trace0;
- }
-
- key0.addr = ip0->dst_address;
- key0.port = udp0->dst_port;
- key0.protocol = proto0;
- key0.fib_index = rx_fib_index0;
-
- kv0.key = key0.as_u64;
-
- if (clib_bihash_search_8_8 (&sm->per_thread_data[thread_index].out2in,
- &kv0, &value0))
- {
- /* Try to match static mapping by external address and port,
- destination address and port in packet */
- if (snat_static_mapping_match(sm, key0, &sm0, 1, 0, 0, 0, 0))
- {
- /*
- * Send DHCP packets to the ipv4 stack, or we won't
- * be able to use dhcp client on the outside interface
- */
+ sw_if_index0);
+
+ if (PREDICT_FALSE (ip0->ttl == 1))
+ {
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
+ icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
+ ICMP4_time_exceeded_ttl_exceeded_in_transit,
+ 0);
+ next0 = SNAT_OUT2IN_NEXT_ICMP_ERROR;
+ goto trace0;
+ }
+
+ proto0 = ip_proto_to_snat_proto (ip0->protocol);
+
+ if (PREDICT_FALSE (proto0 == ~0))
+ {
+ if (nat_out2in_sm_unknown_proto (sm, b0, ip0, rx_fib_index0))
+ {
+ if (!sm->forwarding_enabled)
+ {
+ b0->error =
+ node->errors[SNAT_OUT2IN_ERROR_UNSUPPORTED_PROTOCOL];
+ next0 = SNAT_OUT2IN_NEXT_DROP;
+ }
+ }
+ goto trace0;
+ }
+
+ if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
+ {
+ next0 = icmp_out2in_slow_path
+ (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
+ next0, now, thread_index, &s0);
+ goto trace0;
+ }
+
+ if (PREDICT_FALSE (ip4_is_fragment (ip0)))
+ {
+ next0 = SNAT_OUT2IN_NEXT_REASS;
+ goto trace0;
+ }
+
+ key0.addr = ip0->dst_address;
+ key0.port = udp0->dst_port;
+ key0.protocol = proto0;
+ key0.fib_index = rx_fib_index0;
+
+ kv0.key = key0.as_u64;
+
+ if (clib_bihash_search_8_8
+ (&sm->per_thread_data[thread_index].out2in, &kv0, &value0))
+ {
+ /* Try to match static mapping by external address and port,
+ destination address and port in packet */
+ if (snat_static_mapping_match (sm, key0, &sm0, 1, 0, 0, 0, 0))
+ {
+ /*
+ * Send DHCP packets to the ipv4 stack, or we won't
+ * be able to use dhcp client on the outside interface
+ */
if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_UDP
- && (udp0->dst_port ==
- clib_host_to_net_u16(UDP_DST_PORT_dhcp_to_client))))
+ && (udp0->dst_port ==
+ clib_host_to_net_u16
+ (UDP_DST_PORT_dhcp_to_client))))
{
vnet_feature_next (&next0, b0);
goto trace0;
}
- if (!sm->forwarding_enabled)
- {
- b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
- next0 = SNAT_OUT2IN_NEXT_DROP;
- }
- goto trace0;
- }
-
- /* Create session initiated by host from external network */
- s0 = create_session_for_static_mapping(sm, b0, sm0, key0, node,
- thread_index, now);
- if (!s0)
- {
- next0 = SNAT_OUT2IN_NEXT_DROP;
- goto trace0;
- }
- }
- else
- s0 = pool_elt_at_index (sm->per_thread_data[thread_index].sessions,
- value0.value);
-
- old_addr0 = ip0->dst_address.as_u32;
- ip0->dst_address = s0->in2out.addr;
- new_addr0 = ip0->dst_address.as_u32;
- vnet_buffer(b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index;
-
- sum0 = ip0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
- ip4_header_t,
- dst_address /* changed member */);
- ip0->checksum = ip_csum_fold (sum0);
-
- if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP))
- {
- old_port0 = tcp0->dst_port;
- tcp0->dst_port = s0->in2out.port;
- new_port0 = tcp0->dst_port;
-
- sum0 = tcp0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
- ip4_header_t,
- dst_address /* changed member */);
-
- sum0 = ip_csum_update (sum0, old_port0, new_port0,
- ip4_header_t /* cheat */,
- length /* changed member */);
- tcp0->checksum = ip_csum_fold(sum0);
- }
- else
- {
- old_port0 = udp0->dst_port;
- udp0->dst_port = s0->in2out.port;
- udp0->checksum = 0;
- }
-
- /* Accounting */
- nat44_session_update_counters (s0, now,
- vlib_buffer_length_in_chain (vm, b0));
- /* Per-user LRU list maintenance */
- nat44_session_update_lru (sm, s0, thread_index);
- trace0:
-
- if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b0->flags & VLIB_BUFFER_IS_TRACED)))
- {
- snat_out2in_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->sw_if_index = sw_if_index0;
- t->next_index = next0;
- t->session_index = ~0;
- if (s0)
- t->session_index = s0 - sm->per_thread_data[thread_index].sessions;
- }
-
- pkts_processed += next0 != SNAT_OUT2IN_NEXT_DROP;
-
-
- ip1 = vlib_buffer_get_current (b1);
- udp1 = ip4_next_header (ip1);
- tcp1 = (tcp_header_t *) udp1;
- icmp1 = (icmp46_header_t *) udp1;
-
- sw_if_index1 = vnet_buffer(b1)->sw_if_index[VLIB_RX];
+ if (!sm->forwarding_enabled)
+ {
+ b0->error =
+ node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
+ next0 = SNAT_OUT2IN_NEXT_DROP;
+ }
+ goto trace0;
+ }
+
+ /* Create session initiated by host from external network */
+ s0 = create_session_for_static_mapping (sm, b0, sm0, key0, node,
+ thread_index, now);
+ if (!s0)
+ {
+ next0 = SNAT_OUT2IN_NEXT_DROP;
+ goto trace0;
+ }
+ }
+ else
+ s0 =
+ pool_elt_at_index (sm->per_thread_data[thread_index].sessions,
+ value0.value);
+
+ old_addr0 = ip0->dst_address.as_u32;
+ ip0->dst_address = s0->in2out.addr;
+ new_addr0 = ip0->dst_address.as_u32;
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index;
+
+ sum0 = ip0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
+ ip4_header_t,
+ dst_address /* changed member */ );
+ ip0->checksum = ip_csum_fold (sum0);
+
+ if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
+ {
+ old_port0 = tcp0->dst_port;
+ tcp0->dst_port = s0->in2out.port;
+ new_port0 = tcp0->dst_port;
+
+ sum0 = tcp0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
+ ip4_header_t,
+ dst_address /* changed member */ );
+
+ sum0 = ip_csum_update (sum0, old_port0, new_port0,
+ ip4_header_t /* cheat */ ,
+ length /* changed member */ );
+ tcp0->checksum = ip_csum_fold (sum0);
+ }
+ else
+ {
+ old_port0 = udp0->dst_port;
+ udp0->dst_port = s0->in2out.port;
+ udp0->checksum = 0;
+ }
+
+ /* Accounting */
+ nat44_session_update_counters (s0, now,
+ vlib_buffer_length_in_chain (vm,
+ b0));
+ /* Per-user LRU list maintenance */
+ nat44_session_update_lru (sm, s0, thread_index);
+ trace0:
+
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ snat_out2in_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->sw_if_index = sw_if_index0;
+ t->next_index = next0;
+ t->session_index = ~0;
+ if (s0)
+ t->session_index =
+ s0 - sm->per_thread_data[thread_index].sessions;
+ }
+
+ pkts_processed += next0 != SNAT_OUT2IN_NEXT_DROP;
+
+
+ ip1 = vlib_buffer_get_current (b1);
+ udp1 = ip4_next_header (ip1);
+ tcp1 = (tcp_header_t *) udp1;
+ icmp1 = (icmp46_header_t *) udp1;
+
+ sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX];
rx_fib_index1 = vec_elt (sm->ip4_main->fib_index_by_sw_if_index,
- sw_if_index1);
-
- if (PREDICT_FALSE(ip1->ttl == 1))
- {
- vnet_buffer (b1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
- icmp4_error_set_vnet_buffer (b1, ICMP4_time_exceeded,
- ICMP4_time_exceeded_ttl_exceeded_in_transit,
- 0);
- next1 = SNAT_OUT2IN_NEXT_ICMP_ERROR;
- goto trace1;
- }
-
- proto1 = ip_proto_to_snat_proto (ip1->protocol);
-
- if (PREDICT_FALSE (proto1 == ~0))
- {
- if (nat_out2in_sm_unknown_proto(sm, b1, ip1, rx_fib_index1))
- {
- if (!sm->forwarding_enabled)
- {
- b1->error = node->errors[SNAT_OUT2IN_ERROR_UNSUPPORTED_PROTOCOL];
- next1 = SNAT_OUT2IN_NEXT_DROP;
- }
- }
- goto trace1;
- }
-
- if (PREDICT_FALSE (proto1 == SNAT_PROTOCOL_ICMP))
- {
- next1 = icmp_out2in_slow_path
- (sm, b1, ip1, icmp1, sw_if_index1, rx_fib_index1, node,
- next1, now, thread_index, &s1);
- goto trace1;
- }
-
- if (PREDICT_FALSE (ip4_is_fragment (ip1)))
- {
- next1 = SNAT_OUT2IN_NEXT_REASS;
- goto trace1;
- }
-
- key1.addr = ip1->dst_address;
- key1.port = udp1->dst_port;
- key1.protocol = proto1;
- key1.fib_index = rx_fib_index1;
-
- kv1.key = key1.as_u64;
-
- if (clib_bihash_search_8_8 (&sm->per_thread_data[thread_index].out2in,
- &kv1, &value1))
- {
- /* Try to match static mapping by external address and port,
- destination address and port in packet */
- if (snat_static_mapping_match(sm, key1, &sm1, 1, 0, 0, 0, 0))
- {
- /*
- * Send DHCP packets to the ipv4 stack, or we won't
- * be able to use dhcp client on the outside interface
- */
+ sw_if_index1);
+
+ if (PREDICT_FALSE (ip1->ttl == 1))
+ {
+ vnet_buffer (b1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
+ icmp4_error_set_vnet_buffer (b1, ICMP4_time_exceeded,
+ ICMP4_time_exceeded_ttl_exceeded_in_transit,
+ 0);
+ next1 = SNAT_OUT2IN_NEXT_ICMP_ERROR;
+ goto trace1;
+ }
+
+ proto1 = ip_proto_to_snat_proto (ip1->protocol);
+
+ if (PREDICT_FALSE (proto1 == ~0))
+ {
+ if (nat_out2in_sm_unknown_proto (sm, b1, ip1, rx_fib_index1))
+ {
+ if (!sm->forwarding_enabled)
+ {
+ b1->error =
+ node->errors[SNAT_OUT2IN_ERROR_UNSUPPORTED_PROTOCOL];
+ next1 = SNAT_OUT2IN_NEXT_DROP;
+ }
+ }
+ goto trace1;
+ }
+
+ if (PREDICT_FALSE (proto1 == SNAT_PROTOCOL_ICMP))
+ {
+ next1 = icmp_out2in_slow_path
+ (sm, b1, ip1, icmp1, sw_if_index1, rx_fib_index1, node,
+ next1, now, thread_index, &s1);
+ goto trace1;
+ }
+
+ if (PREDICT_FALSE (ip4_is_fragment (ip1)))
+ {
+ next1 = SNAT_OUT2IN_NEXT_REASS;
+ goto trace1;
+ }
+
+ key1.addr = ip1->dst_address;
+ key1.port = udp1->dst_port;
+ key1.protocol = proto1;
+ key1.fib_index = rx_fib_index1;
+
+ kv1.key = key1.as_u64;
+
+ if (clib_bihash_search_8_8
+ (&sm->per_thread_data[thread_index].out2in, &kv1, &value1))
+ {
+ /* Try to match static mapping by external address and port,
+ destination address and port in packet */
+ if (snat_static_mapping_match (sm, key1, &sm1, 1, 0, 0, 0, 0))
+ {
+ /*
+ * Send DHCP packets to the ipv4 stack, or we won't
+ * be able to use dhcp client on the outside interface
+ */
if (PREDICT_FALSE (proto1 == SNAT_PROTOCOL_UDP
- && (udp1->dst_port ==
- clib_host_to_net_u16(UDP_DST_PORT_dhcp_to_client))))
+ && (udp1->dst_port ==
+ clib_host_to_net_u16
+ (UDP_DST_PORT_dhcp_to_client))))
{
vnet_feature_next (&next1, b1);
goto trace1;
}
- if (!sm->forwarding_enabled)
- {
- b1->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
- next1 = SNAT_OUT2IN_NEXT_DROP;
- }
- goto trace1;
- }
-
- /* Create session initiated by host from external network */
- s1 = create_session_for_static_mapping(sm, b1, sm1, key1, node,
- thread_index, now);
- if (!s1)
- {
- next1 = SNAT_OUT2IN_NEXT_DROP;
- goto trace1;
- }
- }
- else
- s1 = pool_elt_at_index (sm->per_thread_data[thread_index].sessions,
- value1.value);
-
- old_addr1 = ip1->dst_address.as_u32;
- ip1->dst_address = s1->in2out.addr;
- new_addr1 = ip1->dst_address.as_u32;
- vnet_buffer(b1)->sw_if_index[VLIB_TX] = s1->in2out.fib_index;
-
- sum1 = ip1->checksum;
- sum1 = ip_csum_update (sum1, old_addr1, new_addr1,
- ip4_header_t,
- dst_address /* changed member */);
- ip1->checksum = ip_csum_fold (sum1);
-
- if (PREDICT_TRUE(proto1 == SNAT_PROTOCOL_TCP))
- {
- old_port1 = tcp1->dst_port;
- tcp1->dst_port = s1->in2out.port;
- new_port1 = tcp1->dst_port;
-
- sum1 = tcp1->checksum;
- sum1 = ip_csum_update (sum1, old_addr1, new_addr1,
- ip4_header_t,
- dst_address /* changed member */);
-
- sum1 = ip_csum_update (sum1, old_port1, new_port1,
- ip4_header_t /* cheat */,
- length /* changed member */);
- tcp1->checksum = ip_csum_fold(sum1);
- }
- else
- {
- old_port1 = udp1->dst_port;
- udp1->dst_port = s1->in2out.port;
- udp1->checksum = 0;
- }
-
- /* Accounting */
- nat44_session_update_counters (s1, now,
- vlib_buffer_length_in_chain (vm, b1));
- /* Per-user LRU list maintenance */
- nat44_session_update_lru (sm, s1, thread_index);
- trace1:
-
- if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b1->flags & VLIB_BUFFER_IS_TRACED)))
- {
- snat_out2in_trace_t *t =
- vlib_add_trace (vm, node, b1, sizeof (*t));
- t->sw_if_index = sw_if_index1;
- t->next_index = next1;
- t->session_index = ~0;
- if (s1)
- t->session_index = s1 - sm->per_thread_data[thread_index].sessions;
- }
-
- pkts_processed += next1 != SNAT_OUT2IN_NEXT_DROP;
-
- /* verify speculative enqueues, maybe switch current next frame */
- vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
- to_next, n_left_to_next,
- bi0, bi1, next0, next1);
- }
+ if (!sm->forwarding_enabled)
+ {
+ b1->error =
+ node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
+ next1 = SNAT_OUT2IN_NEXT_DROP;
+ }
+ goto trace1;
+ }
+
+ /* Create session initiated by host from external network */
+ s1 = create_session_for_static_mapping (sm, b1, sm1, key1, node,
+ thread_index, now);
+ if (!s1)
+ {
+ next1 = SNAT_OUT2IN_NEXT_DROP;
+ goto trace1;
+ }
+ }
+ else
+ s1 =
+ pool_elt_at_index (sm->per_thread_data[thread_index].sessions,
+ value1.value);
+
+ old_addr1 = ip1->dst_address.as_u32;
+ ip1->dst_address = s1->in2out.addr;
+ new_addr1 = ip1->dst_address.as_u32;
+ vnet_buffer (b1)->sw_if_index[VLIB_TX] = s1->in2out.fib_index;
+
+ sum1 = ip1->checksum;
+ sum1 = ip_csum_update (sum1, old_addr1, new_addr1,
+ ip4_header_t,
+ dst_address /* changed member */ );
+ ip1->checksum = ip_csum_fold (sum1);
+
+ if (PREDICT_TRUE (proto1 == SNAT_PROTOCOL_TCP))
+ {
+ old_port1 = tcp1->dst_port;
+ tcp1->dst_port = s1->in2out.port;
+ new_port1 = tcp1->dst_port;
+
+ sum1 = tcp1->checksum;
+ sum1 = ip_csum_update (sum1, old_addr1, new_addr1,
+ ip4_header_t,
+ dst_address /* changed member */ );
+
+ sum1 = ip_csum_update (sum1, old_port1, new_port1,
+ ip4_header_t /* cheat */ ,
+ length /* changed member */ );
+ tcp1->checksum = ip_csum_fold (sum1);
+ }
+ else
+ {
+ old_port1 = udp1->dst_port;
+ udp1->dst_port = s1->in2out.port;
+ udp1->checksum = 0;
+ }
+
+ /* Accounting */
+ nat44_session_update_counters (s1, now,
+ vlib_buffer_length_in_chain (vm,
+ b1));
+ /* Per-user LRU list maintenance */
+ nat44_session_update_lru (sm, s1, thread_index);
+ trace1:
+
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b1->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ snat_out2in_trace_t *t =
+ vlib_add_trace (vm, node, b1, sizeof (*t));
+ t->sw_if_index = sw_if_index1;
+ t->next_index = next1;
+ t->session_index = ~0;
+ if (s1)
+ t->session_index =
+ s1 - sm->per_thread_data[thread_index].sessions;
+ }
+
+ pkts_processed += next1 != SNAT_OUT2IN_NEXT_DROP;
+
+ /* verify speculative enqueues, maybe switch current next frame */
+ vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
+ to_next, n_left_to_next,
+ bi0, bi1, next0, next1);
+ }
while (n_left_from > 0 && n_left_to_next > 0)
{
- u32 bi0;
- vlib_buffer_t * b0;
- u32 next0 = SNAT_OUT2IN_NEXT_LOOKUP;
- u32 sw_if_index0;
- ip4_header_t * ip0;
- ip_csum_t sum0;
- u32 new_addr0, old_addr0;
- u16 new_port0, old_port0;
- udp_header_t * udp0;
- tcp_header_t * tcp0;
- icmp46_header_t * icmp0;
- snat_session_key_t key0, sm0;
- u32 rx_fib_index0;
- u32 proto0;
- snat_session_t * s0 = 0;
- clib_bihash_kv_8_8_t kv0, value0;
-
- /* speculatively enqueue b0 to the current next frame */
+ u32 bi0;
+ vlib_buffer_t *b0;
+ u32 next0 = SNAT_OUT2IN_NEXT_LOOKUP;
+ u32 sw_if_index0;
+ ip4_header_t *ip0;
+ ip_csum_t sum0;
+ u32 new_addr0, old_addr0;
+ u16 new_port0, old_port0;
+ udp_header_t *udp0;
+ tcp_header_t *tcp0;
+ icmp46_header_t *icmp0;
+ snat_session_key_t key0, sm0;
+ u32 rx_fib_index0;
+ u32 proto0;
+ snat_session_t *s0 = 0;
+ clib_bihash_kv_8_8_t kv0, value0;
+
+ /* speculatively enqueue b0 to the current next frame */
bi0 = from[0];
to_next[0] = bi0;
from += 1;
b0 = vlib_get_buffer (vm, bi0);
- vnet_buffer (b0)->snat.flags = 0;
+ vnet_buffer (b0)->snat.flags = 0;
- ip0 = vlib_buffer_get_current (b0);
- udp0 = ip4_next_header (ip0);
- tcp0 = (tcp_header_t *) udp0;
- icmp0 = (icmp46_header_t *) udp0;
+ ip0 = vlib_buffer_get_current (b0);
+ udp0 = ip4_next_header (ip0);
+ tcp0 = (tcp_header_t *) udp0;
+ icmp0 = (icmp46_header_t *) udp0;
- sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
rx_fib_index0 = vec_elt (sm->ip4_main->fib_index_by_sw_if_index,
- sw_if_index0);
-
- proto0 = ip_proto_to_snat_proto (ip0->protocol);
-
- if (PREDICT_FALSE (proto0 == ~0))
- {
- if (nat_out2in_sm_unknown_proto(sm, b0, ip0, rx_fib_index0))
- {
- if (!sm->forwarding_enabled)
- {
- b0->error = node->errors[SNAT_OUT2IN_ERROR_UNSUPPORTED_PROTOCOL];
- next0 = SNAT_OUT2IN_NEXT_DROP;
- }
- }
- goto trace00;
- }
-
- if (PREDICT_FALSE(ip0->ttl == 1))
- {
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
- icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
- ICMP4_time_exceeded_ttl_exceeded_in_transit,
- 0);
- next0 = SNAT_OUT2IN_NEXT_ICMP_ERROR;
- goto trace00;
- }
-
- if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
- {
- next0 = icmp_out2in_slow_path
- (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
- next0, now, thread_index, &s0);
- goto trace00;
- }
-
- if (PREDICT_FALSE (ip4_is_fragment (ip0)))
- {
- next0 = SNAT_OUT2IN_NEXT_REASS;
- goto trace00;
- }
-
- key0.addr = ip0->dst_address;
- key0.port = udp0->dst_port;
- key0.protocol = proto0;
- key0.fib_index = rx_fib_index0;
-
- kv0.key = key0.as_u64;
-
- if (clib_bihash_search_8_8 (&sm->per_thread_data[thread_index].out2in,
- &kv0, &value0))
- {
- /* Try to match static mapping by external address and port,
- destination address and port in packet */
- if (snat_static_mapping_match(sm, key0, &sm0, 1, 0, 0, 0, 0))
- {
- /*
- * Send DHCP packets to the ipv4 stack, or we won't
- * be able to use dhcp client on the outside interface
- */
+ sw_if_index0);
+
+ proto0 = ip_proto_to_snat_proto (ip0->protocol);
+
+ if (PREDICT_FALSE (proto0 == ~0))
+ {
+ if (nat_out2in_sm_unknown_proto (sm, b0, ip0, rx_fib_index0))
+ {
+ if (!sm->forwarding_enabled)
+ {
+ b0->error =
+ node->errors[SNAT_OUT2IN_ERROR_UNSUPPORTED_PROTOCOL];
+ next0 = SNAT_OUT2IN_NEXT_DROP;
+ }
+ }
+ goto trace00;
+ }
+
+ if (PREDICT_FALSE (ip0->ttl == 1))
+ {
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
+ icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
+ ICMP4_time_exceeded_ttl_exceeded_in_transit,
+ 0);
+ next0 = SNAT_OUT2IN_NEXT_ICMP_ERROR;
+ goto trace00;
+ }
+
+ if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
+ {
+ next0 = icmp_out2in_slow_path
+ (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
+ next0, now, thread_index, &s0);
+ goto trace00;
+ }
+
+ if (PREDICT_FALSE (ip4_is_fragment (ip0)))
+ {
+ next0 = SNAT_OUT2IN_NEXT_REASS;
+ goto trace00;
+ }
+
+ key0.addr = ip0->dst_address;
+ key0.port = udp0->dst_port;
+ key0.protocol = proto0;
+ key0.fib_index = rx_fib_index0;
+
+ kv0.key = key0.as_u64;
+
+ if (clib_bihash_search_8_8
+ (&sm->per_thread_data[thread_index].out2in, &kv0, &value0))
+ {
+ /* Try to match static mapping by external address and port,
+ destination address and port in packet */
+ if (snat_static_mapping_match (sm, key0, &sm0, 1, 0, 0, 0, 0))
+ {
+ /*
+ * Send DHCP packets to the ipv4 stack, or we won't
+ * be able to use dhcp client on the outside interface
+ */
if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_UDP
- && (udp0->dst_port ==
- clib_host_to_net_u16(UDP_DST_PORT_dhcp_to_client))))
+ && (udp0->dst_port ==
+ clib_host_to_net_u16
+ (UDP_DST_PORT_dhcp_to_client))))
{
vnet_feature_next (&next0, b0);
goto trace00;
}
- if (!sm->forwarding_enabled)
- {
- b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
- next0 = SNAT_OUT2IN_NEXT_DROP;
- }
- goto trace00;
- }
-
- /* Create session initiated by host from external network */
- s0 = create_session_for_static_mapping(sm, b0, sm0, key0, node,
- thread_index, now);
- if (!s0)
- {
- next0 = SNAT_OUT2IN_NEXT_DROP;
- goto trace00;
- }
- }
- else
- s0 = pool_elt_at_index (sm->per_thread_data[thread_index].sessions,
- value0.value);
-
- old_addr0 = ip0->dst_address.as_u32;
- ip0->dst_address = s0->in2out.addr;
- new_addr0 = ip0->dst_address.as_u32;
- vnet_buffer(b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index;
-
- sum0 = ip0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
- ip4_header_t,
- dst_address /* changed member */);
- ip0->checksum = ip_csum_fold (sum0);
-
- if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP))
- {
- old_port0 = tcp0->dst_port;
- tcp0->dst_port = s0->in2out.port;
- new_port0 = tcp0->dst_port;
-
- sum0 = tcp0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
- ip4_header_t,
- dst_address /* changed member */);
-
- sum0 = ip_csum_update (sum0, old_port0, new_port0,
- ip4_header_t /* cheat */,
- length /* changed member */);
- tcp0->checksum = ip_csum_fold(sum0);
- }
- else
- {
- old_port0 = udp0->dst_port;
- udp0->dst_port = s0->in2out.port;
- udp0->checksum = 0;
- }
-
- /* Accounting */
- nat44_session_update_counters (s0, now,
- vlib_buffer_length_in_chain (vm, b0));
- /* Per-user LRU list maintenance */
- nat44_session_update_lru (sm, s0, thread_index);
- trace00:
-
- if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b0->flags & VLIB_BUFFER_IS_TRACED)))
- {
- snat_out2in_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->sw_if_index = sw_if_index0;
- t->next_index = next0;
- t->session_index = ~0;
- if (s0)
- t->session_index = s0 - sm->per_thread_data[thread_index].sessions;
- }
-
- pkts_processed += next0 != SNAT_OUT2IN_NEXT_DROP;
-
- /* verify speculative enqueue, maybe switch current next frame */
+ if (!sm->forwarding_enabled)
+ {
+ b0->error =
+ node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
+ next0 = SNAT_OUT2IN_NEXT_DROP;
+ }
+ goto trace00;
+ }
+
+ /* Create session initiated by host from external network */
+ s0 = create_session_for_static_mapping (sm, b0, sm0, key0, node,
+ thread_index, now);
+ if (!s0)
+ {
+ next0 = SNAT_OUT2IN_NEXT_DROP;
+ goto trace00;
+ }
+ }
+ else
+ s0 =
+ pool_elt_at_index (sm->per_thread_data[thread_index].sessions,
+ value0.value);
+
+ old_addr0 = ip0->dst_address.as_u32;
+ ip0->dst_address = s0->in2out.addr;
+ new_addr0 = ip0->dst_address.as_u32;
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index;
+
+ sum0 = ip0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
+ ip4_header_t,
+ dst_address /* changed member */ );
+ ip0->checksum = ip_csum_fold (sum0);
+
+ if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
+ {
+ old_port0 = tcp0->dst_port;
+ tcp0->dst_port = s0->in2out.port;
+ new_port0 = tcp0->dst_port;
+
+ sum0 = tcp0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
+ ip4_header_t,
+ dst_address /* changed member */ );
+
+ sum0 = ip_csum_update (sum0, old_port0, new_port0,
+ ip4_header_t /* cheat */ ,
+ length /* changed member */ );
+ tcp0->checksum = ip_csum_fold (sum0);
+ }
+ else
+ {
+ old_port0 = udp0->dst_port;
+ udp0->dst_port = s0->in2out.port;
+ udp0->checksum = 0;
+ }
+
+ /* Accounting */
+ nat44_session_update_counters (s0, now,
+ vlib_buffer_length_in_chain (vm,
+ b0));
+ /* Per-user LRU list maintenance */
+ nat44_session_update_lru (sm, s0, thread_index);
+ trace00:
+
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ snat_out2in_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->sw_if_index = sw_if_index0;
+ t->next_index = next0;
+ t->session_index = ~0;
+ if (s0)
+ t->session_index =
+ s0 - sm->per_thread_data[thread_index].sessions;
+ }
+
+ pkts_processed += next0 != SNAT_OUT2IN_NEXT_DROP;
+
+ /* verify speculative enqueue, maybe switch current next frame */
vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
to_next, n_left_to_next,
bi0, next0);
}
vlib_node_increment_counter (vm, snat_out2in_node.index,
- SNAT_OUT2IN_ERROR_OUT2IN_PACKETS,
- pkts_processed);
+ SNAT_OUT2IN_ERROR_OUT2IN_PACKETS,
+ pkts_processed);
return frame->n_vectors;
}
+/* *INDENT-OFF* */
VLIB_REGISTER_NODE (snat_out2in_node) = {
.function = snat_out2in_node_fn,
.name = "nat44-out2in",
[SNAT_OUT2IN_NEXT_REASS] = "nat44-out2in-reass",
},
};
+/* *INDENT-ON* */
+
VLIB_NODE_FUNCTION_MULTIARCH (snat_out2in_node, snat_out2in_node_fn);
static uword
nat44_out2in_reass_node_fn (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
+ vlib_node_runtime_t * node, vlib_frame_t * frame)
{
u32 n_left_from, *from, *to_next;
snat_out2in_next_t next_index;
vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
while (n_left_from > 0 && n_left_to_next > 0)
- {
- u32 bi0, sw_if_index0, proto0, rx_fib_index0, new_addr0, old_addr0;
+ {
+ u32 bi0, sw_if_index0, proto0, rx_fib_index0, new_addr0, old_addr0;
vlib_buffer_t *b0;
- u32 next0;
- u8 cached0 = 0;
- ip4_header_t *ip0;
- nat_reass_ip4_t *reass0;
- udp_header_t * udp0;
- tcp_header_t * tcp0;
- snat_session_key_t key0, sm0;
- clib_bihash_kv_8_8_t kv0, value0;
- snat_session_t * s0 = 0;
- u16 old_port0, new_port0;
- ip_csum_t sum0;
-
- /* speculatively enqueue b0 to the current next frame */
+ u32 next0;
+ u8 cached0 = 0;
+ ip4_header_t *ip0;
+ nat_reass_ip4_t *reass0;
+ udp_header_t *udp0;
+ tcp_header_t *tcp0;
+ snat_session_key_t key0, sm0;
+ clib_bihash_kv_8_8_t kv0, value0;
+ snat_session_t *s0 = 0;
+ u16 old_port0, new_port0;
+ ip_csum_t sum0;
+
+ /* speculatively enqueue b0 to the current next frame */
bi0 = from[0];
to_next[0] = bi0;
from += 1;
n_left_to_next -= 1;
b0 = vlib_get_buffer (vm, bi0);
- next0 = SNAT_OUT2IN_NEXT_LOOKUP;
-
- sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
- rx_fib_index0 = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
- sw_if_index0);
-
- if (PREDICT_FALSE (nat_reass_is_drop_frag(0)))
- {
- next0 = SNAT_OUT2IN_NEXT_DROP;
- b0->error = node->errors[SNAT_OUT2IN_ERROR_DROP_FRAGMENT];
- goto trace0;
- }
-
- ip0 = (ip4_header_t *) vlib_buffer_get_current (b0);
- udp0 = ip4_next_header (ip0);
- tcp0 = (tcp_header_t *) udp0;
- proto0 = ip_proto_to_snat_proto (ip0->protocol);
-
- reass0 = nat_ip4_reass_find_or_create (ip0->src_address,
- ip0->dst_address,
- ip0->fragment_id,
- ip0->protocol,
- 1,
- &fragments_to_drop);
-
- if (PREDICT_FALSE (!reass0))
- {
- next0 = SNAT_OUT2IN_NEXT_DROP;
- b0->error = node->errors[SNAT_OUT2IN_ERROR_MAX_REASS];
- nat_log_notice ("maximum reassemblies exceeded");
- goto trace0;
- }
-
- if (PREDICT_FALSE (ip4_is_first_fragment (ip0)))
- {
- key0.addr = ip0->dst_address;
- key0.port = udp0->dst_port;
- key0.protocol = proto0;
- key0.fib_index = rx_fib_index0;
- kv0.key = key0.as_u64;
-
- if (clib_bihash_search_8_8 (&per_thread_data->out2in, &kv0, &value0))
- {
- /* Try to match static mapping by external address and port,
- destination address and port in packet */
- if (snat_static_mapping_match(sm, key0, &sm0, 1, 0, 0, 0, 0))
- {
- /*
- * Send DHCP packets to the ipv4 stack, or we won't
- * be able to use dhcp client on the outside interface
- */
- if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_UDP
- && (udp0->dst_port
- == clib_host_to_net_u16(UDP_DST_PORT_dhcp_to_client))))
+ next0 = SNAT_OUT2IN_NEXT_LOOKUP;
+
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+ rx_fib_index0 =
+ fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
+ sw_if_index0);
+
+ if (PREDICT_FALSE (nat_reass_is_drop_frag (0)))
+ {
+ next0 = SNAT_OUT2IN_NEXT_DROP;
+ b0->error = node->errors[SNAT_OUT2IN_ERROR_DROP_FRAGMENT];
+ goto trace0;
+ }
+
+ ip0 = (ip4_header_t *) vlib_buffer_get_current (b0);
+ udp0 = ip4_next_header (ip0);
+ tcp0 = (tcp_header_t *) udp0;
+ proto0 = ip_proto_to_snat_proto (ip0->protocol);
+
+ reass0 = nat_ip4_reass_find_or_create (ip0->src_address,
+ ip0->dst_address,
+ ip0->fragment_id,
+ ip0->protocol,
+ 1, &fragments_to_drop);
+
+ if (PREDICT_FALSE (!reass0))
+ {
+ next0 = SNAT_OUT2IN_NEXT_DROP;
+ b0->error = node->errors[SNAT_OUT2IN_ERROR_MAX_REASS];
+ nat_log_notice ("maximum reassemblies exceeded");
+ goto trace0;
+ }
+
+ if (PREDICT_FALSE (ip4_is_first_fragment (ip0)))
+ {
+ key0.addr = ip0->dst_address;
+ key0.port = udp0->dst_port;
+ key0.protocol = proto0;
+ key0.fib_index = rx_fib_index0;
+ kv0.key = key0.as_u64;
+
+ if (clib_bihash_search_8_8
+ (&per_thread_data->out2in, &kv0, &value0))
+ {
+ /* Try to match static mapping by external address and port,
+ destination address and port in packet */
+ if (snat_static_mapping_match
+ (sm, key0, &sm0, 1, 0, 0, 0, 0))
+ {
+ /*
+ * Send DHCP packets to the ipv4 stack, or we won't
+ * be able to use dhcp client on the outside interface
+ */
+ if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_UDP
+ && (udp0->dst_port
+ ==
+ clib_host_to_net_u16
+ (UDP_DST_PORT_dhcp_to_client))))
+ {
+ vnet_feature_next (&next0, b0);
+ goto trace0;
+ }
+
+ if (!sm->forwarding_enabled)
{
- vnet_feature_next (&next0, b0);
- goto trace0;
- }
-
- if (!sm->forwarding_enabled)
- {
- b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
- next0 = SNAT_OUT2IN_NEXT_DROP;
- }
- goto trace0;
- }
-
- /* Create session initiated by host from external network */
- s0 = create_session_for_static_mapping(sm, b0, sm0, key0, node,
- thread_index, now);
- if (!s0)
- {
- b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
- next0 = SNAT_OUT2IN_NEXT_DROP;
- goto trace0;
- }
- reass0->sess_index = s0 - per_thread_data->sessions;
- reass0->thread_index = thread_index;
- }
- else
- {
- s0 = pool_elt_at_index (per_thread_data->sessions,
- value0.value);
- reass0->sess_index = value0.value;
- }
- nat_ip4_reass_get_frags (reass0, &fragments_to_loopback);
- }
- else
- {
- if (PREDICT_FALSE (reass0->sess_index == (u32) ~0))
- {
- if (nat_ip4_reass_add_fragment (reass0, bi0, &fragments_to_drop))
- {
- b0->error = node->errors[SNAT_OUT2IN_ERROR_MAX_FRAG];
- nat_log_notice ("maximum fragments per reassembly exceeded");
- next0 = SNAT_OUT2IN_NEXT_DROP;
- goto trace0;
- }
- cached0 = 1;
- goto trace0;
- }
- s0 = pool_elt_at_index (per_thread_data->sessions,
- reass0->sess_index);
- }
-
- old_addr0 = ip0->dst_address.as_u32;
- ip0->dst_address = s0->in2out.addr;
- new_addr0 = ip0->dst_address.as_u32;
- vnet_buffer(b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index;
-
- sum0 = ip0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
- ip4_header_t,
- dst_address /* changed member */);
- ip0->checksum = ip_csum_fold (sum0);
-
- if (PREDICT_FALSE (ip4_is_first_fragment (ip0)))
- {
- if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP))
- {
- old_port0 = tcp0->dst_port;
- tcp0->dst_port = s0->in2out.port;
- new_port0 = tcp0->dst_port;
-
- sum0 = tcp0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
- ip4_header_t,
- dst_address /* changed member */);
-
- sum0 = ip_csum_update (sum0, old_port0, new_port0,
- ip4_header_t /* cheat */,
- length /* changed member */);
- tcp0->checksum = ip_csum_fold(sum0);
- }
- else
- {
- old_port0 = udp0->dst_port;
- udp0->dst_port = s0->in2out.port;
- udp0->checksum = 0;
- }
- }
-
- /* Accounting */
- nat44_session_update_counters (s0, now,
- vlib_buffer_length_in_chain (vm, b0));
- /* Per-user LRU list maintenance */
- nat44_session_update_lru (sm, s0, thread_index);
-
- trace0:
- if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b0->flags & VLIB_BUFFER_IS_TRACED)))
- {
- nat44_out2in_reass_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->cached = cached0;
- t->sw_if_index = sw_if_index0;
- t->next_index = next0;
- }
-
- if (cached0)
- {
- n_left_to_next++;
- to_next--;
- }
- else
- {
- pkts_processed += next0 != SNAT_OUT2IN_NEXT_DROP;
-
- /* verify speculative enqueue, maybe switch current next frame */
- vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
- to_next, n_left_to_next,
- bi0, next0);
- }
+ b0->error =
+ node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
+ next0 = SNAT_OUT2IN_NEXT_DROP;
+ }
+ goto trace0;
+ }
+
+ /* Create session initiated by host from external network */
+ s0 =
+ create_session_for_static_mapping (sm, b0, sm0, key0,
+ node, thread_index,
+ now);
+ if (!s0)
+ {
+ b0->error =
+ node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
+ next0 = SNAT_OUT2IN_NEXT_DROP;
+ goto trace0;
+ }
+ reass0->sess_index = s0 - per_thread_data->sessions;
+ reass0->thread_index = thread_index;
+ }
+ else
+ {
+ s0 = pool_elt_at_index (per_thread_data->sessions,
+ value0.value);
+ reass0->sess_index = value0.value;
+ }
+ nat_ip4_reass_get_frags (reass0, &fragments_to_loopback);
+ }
+ else
+ {
+ if (PREDICT_FALSE (reass0->sess_index == (u32) ~ 0))
+ {
+ if (nat_ip4_reass_add_fragment
+ (reass0, bi0, &fragments_to_drop))
+ {
+ b0->error = node->errors[SNAT_OUT2IN_ERROR_MAX_FRAG];
+ nat_log_notice
+ ("maximum fragments per reassembly exceeded");
+ next0 = SNAT_OUT2IN_NEXT_DROP;
+ goto trace0;
+ }
+ cached0 = 1;
+ goto trace0;
+ }
+ s0 = pool_elt_at_index (per_thread_data->sessions,
+ reass0->sess_index);
+ }
+
+ old_addr0 = ip0->dst_address.as_u32;
+ ip0->dst_address = s0->in2out.addr;
+ new_addr0 = ip0->dst_address.as_u32;
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index;
+
+ sum0 = ip0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
+ ip4_header_t,
+ dst_address /* changed member */ );
+ ip0->checksum = ip_csum_fold (sum0);
+
+ if (PREDICT_FALSE (ip4_is_first_fragment (ip0)))
+ {
+ if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
+ {
+ old_port0 = tcp0->dst_port;
+ tcp0->dst_port = s0->in2out.port;
+ new_port0 = tcp0->dst_port;
+
+ sum0 = tcp0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
+ ip4_header_t,
+ dst_address /* changed member */ );
+
+ sum0 = ip_csum_update (sum0, old_port0, new_port0,
+ ip4_header_t /* cheat */ ,
+ length /* changed member */ );
+ tcp0->checksum = ip_csum_fold (sum0);
+ }
+ else
+ {
+ old_port0 = udp0->dst_port;
+ udp0->dst_port = s0->in2out.port;
+ udp0->checksum = 0;
+ }
+ }
+
+ /* Accounting */
+ nat44_session_update_counters (s0, now,
+ vlib_buffer_length_in_chain (vm,
+ b0));
+ /* Per-user LRU list maintenance */
+ nat44_session_update_lru (sm, s0, thread_index);
+
+ trace0:
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ nat44_reass_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->cached = cached0;
+ t->sw_if_index = sw_if_index0;
+ t->next_index = next0;
+ }
+
+ if (cached0)
+ {
+ n_left_to_next++;
+ to_next--;
+ }
+ else
+ {
+ pkts_processed += next0 != SNAT_OUT2IN_NEXT_DROP;
+
+ /* verify speculative enqueue, maybe switch current next frame */
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
+ to_next, n_left_to_next,
+ bi0, next0);
+ }
if (n_left_from == 0 && vec_len (fragments_to_loopback))
{
u32 len = vec_len (fragments_to_loopback);
if (len <= VLIB_FRAME_SIZE)
{
- clib_memcpy (from, fragments_to_loopback, sizeof (u32) * len);
+ clib_memcpy (from, fragments_to_loopback,
+ sizeof (u32) * len);
n_left_from = len;
vec_reset_length (fragments_to_loopback);
}
else
{
clib_memcpy (from,
- fragments_to_loopback + (len - VLIB_FRAME_SIZE),
- sizeof (u32) * VLIB_FRAME_SIZE);
+ fragments_to_loopback + (len -
+ VLIB_FRAME_SIZE),
+ sizeof (u32) * VLIB_FRAME_SIZE);
n_left_from = VLIB_FRAME_SIZE;
_vec_len (fragments_to_loopback) = len - VLIB_FRAME_SIZE;
}
}
- }
+ }
vlib_put_next_frame (vm, node, next_index, n_left_to_next);
}
vlib_node_increment_counter (vm, nat44_out2in_reass_node.index,
- SNAT_OUT2IN_ERROR_OUT2IN_PACKETS,
- pkts_processed);
+ SNAT_OUT2IN_ERROR_OUT2IN_PACKETS,
+ pkts_processed);
nat_send_all_to_node (vm, fragments_to_drop, node,
- &node->errors[SNAT_OUT2IN_ERROR_DROP_FRAGMENT],
- SNAT_OUT2IN_NEXT_DROP);
+ &node->errors[SNAT_OUT2IN_ERROR_DROP_FRAGMENT],
+ SNAT_OUT2IN_NEXT_DROP);
vec_free (fragments_to_drop);
vec_free (fragments_to_loopback);
return frame->n_vectors;
}
+/* *INDENT-OFF* */
VLIB_REGISTER_NODE (nat44_out2in_reass_node) = {
.function = nat44_out2in_reass_node_fn,
.name = "nat44-out2in-reass",
.vector_size = sizeof (u32),
- .format_trace = format_nat44_out2in_reass_trace,
+ .format_trace = format_nat44_reass_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
.n_errors = ARRAY_LEN(snat_out2in_error_strings),
[SNAT_OUT2IN_NEXT_REASS] = "nat44-out2in-reass",
},
};
+/* *INDENT-ON* */
+
VLIB_NODE_FUNCTION_MULTIARCH (nat44_out2in_reass_node,
- nat44_out2in_reass_node_fn);
-
-/*******************************/
-/*** endpoint-dependent mode ***/
-/*******************************/
-typedef enum {
- NAT44_ED_OUT2IN_NEXT_DROP,
- NAT44_ED_OUT2IN_NEXT_LOOKUP,
- NAT44_ED_OUT2IN_NEXT_ICMP_ERROR,
- NAT44_ED_OUT2IN_NEXT_IN2OUT,
- NAT44_ED_OUT2IN_NEXT_SLOW_PATH,
- NAT44_ED_OUT2IN_NEXT_REASS,
- NAT44_ED_OUT2IN_N_NEXT,
-} nat44_ed_out2in_next_t;
-
-typedef struct {
- u32 sw_if_index;
- u32 next_index;
- u32 session_index;
- u32 is_slow_path;
-} nat44_ed_out2in_trace_t;
+ nat44_out2in_reass_node_fn);
-static u8 *
-format_nat44_ed_out2in_trace (u8 * s, va_list * args)
+static uword
+snat_out2in_fast_node_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * frame)
{
- CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
- CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
- nat44_ed_out2in_trace_t *t = va_arg (*args, nat44_ed_out2in_trace_t *);
- char * tag;
-
- tag = t->is_slow_path ? "NAT44_OUT2IN_SLOW_PATH" : "NAT44_OUT2IN_FAST_PATH";
-
- s = format (s, "%s: sw_if_index %d, next index %d, session %d", tag,
- t->sw_if_index, t->next_index, t->session_index);
-
- return s;
-}
-
-static inline u32
-icmp_out2in_ed_slow_path (snat_main_t * sm, vlib_buffer_t * b0,
- ip4_header_t * ip0, icmp46_header_t * icmp0,
- u32 sw_if_index0, u32 rx_fib_index0,
- vlib_node_runtime_t * node, u32 next0, f64 now,
- u32 thread_index, snat_session_t ** p_s0)
-{
- next0 = icmp_out2in(sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
- next0, thread_index, p_s0, 0);
- snat_session_t * s0 = *p_s0;
- if (PREDICT_TRUE(next0 != SNAT_OUT2IN_NEXT_DROP && s0))
- {
- /* Accounting */
- nat44_session_update_counters (s0, now,
- vlib_buffer_length_in_chain (sm->vlib_main, b0));
- }
- return next0;
-}
-
-int
-nat44_o2i_ed_is_idle_session_cb (clib_bihash_kv_16_8_t * kv, void * arg)
-{
- snat_main_t *sm = &snat_main;
- nat44_is_idle_session_ctx_t *ctx = arg;
- snat_session_t *s;
- u64 sess_timeout_time;
- nat_ed_ses_key_t ed_key;
- clib_bihash_kv_16_8_t ed_kv;
- int i;
- snat_address_t *a;
- snat_session_key_t key;
- snat_main_per_thread_data_t *tsm = vec_elt_at_index (sm->per_thread_data,
- ctx->thread_index);
-
- s = pool_elt_at_index (tsm->sessions, kv->value);
- sess_timeout_time = s->last_heard + (f64)nat44_session_get_timeout(sm, s);
- if (ctx->now >= sess_timeout_time)
- {
- ed_key.l_addr = s->in2out.addr;
- ed_key.r_addr = s->ext_host_addr;
- ed_key.fib_index = s->out2in.fib_index;
- if (snat_is_unk_proto_session (s))
- {
- ed_key.proto = s->in2out.port;
- ed_key.r_port = 0;
- ed_key.l_port = 0;
- }
- else
- {
- ed_key.proto = snat_proto_to_ip_proto (s->in2out.protocol);
- ed_key.l_port = s->in2out.port;
- ed_key.r_port = s->ext_host_port;
- }
- if (is_twice_nat_session (s))
- {
- ed_key.r_addr = s->ext_host_nat_addr;
- ed_key.r_port = s->ext_host_nat_port;
- }
- ed_kv.key[0] = ed_key.as_u64[0];
- ed_kv.key[1] = ed_key.as_u64[1];
- if (clib_bihash_add_del_16_8 (&tsm->in2out_ed, &ed_kv, 0))
- nat_log_warn ("in2out_ed key del failed");
-
- if (snat_is_unk_proto_session (s))
- goto delete;
-
- snat_ipfix_logging_nat44_ses_delete(s->in2out.addr.as_u32,
- s->out2in.addr.as_u32,
- s->in2out.protocol,
- s->in2out.port,
- s->out2in.port,
- s->in2out.fib_index);
-
- if (is_twice_nat_session (s))
- {
- for (i = 0; i < vec_len (sm->twice_nat_addresses); i++)
- {
- key.protocol = s->in2out.protocol;
- key.port = s->ext_host_nat_port;
- a = sm->twice_nat_addresses + i;
- if (a->addr.as_u32 == s->ext_host_nat_addr.as_u32)
- {
- snat_free_outside_address_and_port (sm->twice_nat_addresses,
- ctx->thread_index, &key);
- break;
- }
- }
- }
-
- if (snat_is_session_static (s))
- goto delete;
-
- if (s->outside_address_index != ~0)
- snat_free_outside_address_and_port (sm->addresses, ctx->thread_index,
- &s->out2in);
- delete:
- nat44_delete_session (sm, s, ctx->thread_index);
- return 1;
- }
-
- return 0;
-}
-
-static snat_session_t *
-create_session_for_static_mapping_ed (snat_main_t * sm,
- vlib_buffer_t *b,
- snat_session_key_t l_key,
- snat_session_key_t e_key,
- vlib_node_runtime_t * node,
- u32 thread_index,
- twice_nat_type_t twice_nat,
- lb_nat_type_t lb_nat,
- f64 now)
-{
- snat_session_t *s;
- snat_user_t *u;
- ip4_header_t *ip;
- udp_header_t *udp;
- snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
- clib_bihash_kv_16_8_t kv;
- snat_session_key_t eh_key;
- u32 address_index;
- nat44_is_idle_session_ctx_t ctx;
-
- if (PREDICT_FALSE (maximum_sessions_exceeded(sm, thread_index)))
- {
- b->error = node->errors[SNAT_OUT2IN_ERROR_MAX_SESSIONS_EXCEEDED];
- nat_log_notice ("maximum sessions exceeded");
- return 0;
- }
-
- u = nat_user_get_or_create (sm, &l_key.addr, l_key.fib_index, thread_index);
- if (!u)
- {
- nat_log_warn ("create NAT user failed");
- return 0;
- }
-
- s = nat_ed_session_alloc (sm, u, thread_index);
- if (!s)
- {
- nat44_delete_user_with_no_session (sm, u, thread_index);
- nat_log_warn ("create NAT session failed");
- return 0;
- }
-
- ip = vlib_buffer_get_current (b);
- udp = ip4_next_header (ip);
-
- s->ext_host_addr.as_u32 = ip->src_address.as_u32;
- s->ext_host_port = e_key.protocol == SNAT_PROTOCOL_ICMP ? 0 : udp->src_port;
- s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING;
- if (lb_nat)
- s->flags |= SNAT_SESSION_FLAG_LOAD_BALANCING;
- if (lb_nat == AFFINITY_LB_NAT)
- s->flags |= SNAT_SESSION_FLAG_AFFINITY;
- s->flags |= SNAT_SESSION_FLAG_ENDPOINT_DEPENDENT;
- s->outside_address_index = ~0;
- s->out2in = e_key;
- s->in2out = l_key;
- s->in2out.protocol = s->out2in.protocol;
- user_session_increment (sm, u, 1);
-
- /* Add to lookup tables */
- make_ed_kv (&kv, &e_key.addr, &s->ext_host_addr, ip->protocol,
- e_key.fib_index, e_key.port, s->ext_host_port);
- kv.value = s - tsm->sessions;
- ctx.now = now;
- ctx.thread_index = thread_index;
- if (clib_bihash_add_or_overwrite_stale_16_8 (&tsm->out2in_ed, &kv,
- nat44_o2i_ed_is_idle_session_cb,
- &ctx))
- nat_log_notice ("out2in-ed key add failed");
-
- if (twice_nat == TWICE_NAT || (twice_nat == TWICE_NAT_SELF &&
- ip->src_address.as_u32 == l_key.addr.as_u32))
- {
- eh_key.protocol = e_key.protocol;
- if (snat_alloc_outside_address_and_port (sm->twice_nat_addresses, 0,
- thread_index, &eh_key,
- &address_index,
- sm->port_per_thread,
- tsm->snat_thread_index))
- {
- b->error = node->errors[SNAT_OUT2IN_ERROR_OUT_OF_PORTS];
- nat44_delete_session (sm, s, thread_index);
- if (clib_bihash_add_del_16_8 (&tsm->out2in_ed, &kv, 0))
- nat_log_notice ("out2in-ed key del failed");
- return 0;
- }
- s->ext_host_nat_addr.as_u32 = eh_key.addr.as_u32;
- s->ext_host_nat_port = eh_key.port;
- s->flags |= SNAT_SESSION_FLAG_TWICE_NAT;
- make_ed_kv (&kv, &l_key.addr, &s->ext_host_nat_addr, ip->protocol,
- l_key.fib_index, l_key.port, s->ext_host_nat_port);
- }
- else
- {
- make_ed_kv (&kv, &l_key.addr, &s->ext_host_addr, ip->protocol,
- l_key.fib_index, l_key.port, s->ext_host_port);
- }
- kv.value = s - tsm->sessions;
- if (clib_bihash_add_or_overwrite_stale_16_8 (&tsm->in2out_ed, &kv,
- nat44_i2o_ed_is_idle_session_cb,
- &ctx))
- nat_log_notice ("in2out-ed key add failed");
-
- return s;
-}
-
-static_always_inline int
-icmp_get_ed_key(ip4_header_t *ip0, nat_ed_ses_key_t *p_key0)
-{
- icmp46_header_t *icmp0;
- nat_ed_ses_key_t key0;
- icmp_echo_header_t *echo0, *inner_echo0 = 0;
- ip4_header_t *inner_ip0;
- void *l4_header = 0;
- icmp46_header_t *inner_icmp0;
-
- icmp0 = (icmp46_header_t *) ip4_next_header (ip0);
- echo0 = (icmp_echo_header_t *)(icmp0+1);
-
- if (!icmp_is_error_message (icmp0))
- {
- key0.proto = IP_PROTOCOL_ICMP;
- key0.l_addr = ip0->dst_address;
- key0.r_addr = ip0->src_address;
- key0.l_port = echo0->identifier;
- key0.r_port = 0;
- }
- else
- {
- inner_ip0 = (ip4_header_t *)(echo0+1);
- l4_header = ip4_next_header (inner_ip0);
- key0.proto = inner_ip0->protocol;
- key0.l_addr = inner_ip0->src_address;
- key0.r_addr = inner_ip0->dst_address;
- switch (ip_proto_to_snat_proto (inner_ip0->protocol))
- {
- case SNAT_PROTOCOL_ICMP:
- inner_icmp0 = (icmp46_header_t*)l4_header;
- inner_echo0 = (icmp_echo_header_t *)(inner_icmp0+1);
- key0.l_port = inner_echo0->identifier;
- key0.r_port = 0;
- break;
- case SNAT_PROTOCOL_UDP:
- case SNAT_PROTOCOL_TCP:
- key0.l_port = ((tcp_udp_header_t*)l4_header)->src_port;
- key0.r_port = ((tcp_udp_header_t*)l4_header)->dst_port;
- break;
- default:
- return -1;
- }
- }
- *p_key0 = key0;
- return 0;
-}
-
-static int
-next_src_nat (snat_main_t * sm, ip4_header_t * ip, u8 proto, u16 src_port,
- u16 dst_port, u32 thread_index, u32 rx_fib_index)
-{
- clib_bihash_kv_16_8_t kv, value;
- snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
-
- make_ed_kv (&kv, &ip->src_address, &ip->dst_address, proto,
- rx_fib_index, src_port, dst_port);
- if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &kv, &value))
- return 1;
-
- return 0;
-}
-
-static void
-create_bypass_for_fwd(snat_main_t * sm, ip4_header_t * ip, u32 rx_fib_index,
- u32 thread_index)
-{
- nat_ed_ses_key_t key;
- clib_bihash_kv_16_8_t kv, value;
- udp_header_t *udp;
- snat_user_t *u;
- snat_session_t *s = 0;
- snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
- f64 now = vlib_time_now (sm->vlib_main);
-
- if (ip->protocol == IP_PROTOCOL_ICMP)
- {
- if (icmp_get_ed_key (ip, &key))
- return;
- }
- else if (ip->protocol == IP_PROTOCOL_UDP || ip->protocol == IP_PROTOCOL_TCP)
- {
- udp = ip4_next_header(ip);
- key.r_addr = ip->src_address;
- key.l_addr = ip->dst_address;
- key.proto = ip->protocol;
- key.l_port = udp->dst_port;
- key.r_port = udp->src_port;
- }
- else
- {
- key.r_addr = ip->src_address;
- key.l_addr = ip->dst_address;
- key.proto = ip->protocol;
- key.l_port = key.r_port = 0;
- }
- key.fib_index = 0;
- kv.key[0] = key.as_u64[0];
- kv.key[1] = key.as_u64[1];
-
- if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &kv, &value))
- {
- s = pool_elt_at_index (tsm->sessions, value.value);
- }
- else
- {
- if (PREDICT_FALSE (maximum_sessions_exceeded(sm, thread_index)))
- return;
-
- u = nat_user_get_or_create (sm, &ip->dst_address, sm->inside_fib_index,
- thread_index);
- if (!u)
- {
- nat_log_warn ("create NAT user failed");
- return;
- }
-
- s = nat_ed_session_alloc (sm, u, thread_index);
- if (!s)
- {
- nat44_delete_user_with_no_session (sm, u, thread_index);
- nat_log_warn ("create NAT session failed");
- return;
- }
-
- s->ext_host_addr = key.r_addr;
- s->ext_host_port = key.r_port;
- s->flags |= SNAT_SESSION_FLAG_FWD_BYPASS;
- s->outside_address_index = ~0;
- s->out2in.addr = key.l_addr;
- s->out2in.port = key.l_port;
- s->out2in.protocol = ip_proto_to_snat_proto (key.proto);
- s->out2in.fib_index = 0;
- s->in2out = s->out2in;
- user_session_increment (sm, u, 0);
-
- kv.value = s - tsm->sessions;
- if (clib_bihash_add_del_16_8 (&tsm->in2out_ed, &kv, 1))
- nat_log_notice ("in2out_ed key add failed");
- }
-
- if (ip->protocol == IP_PROTOCOL_TCP)
- {
- tcp_header_t *tcp = ip4_next_header(ip);
- if (nat44_set_tcp_session_state_o2i (sm, s, tcp, thread_index))
- return;
- }
-
- /* Accounting */
- nat44_session_update_counters (s, now, 0);
-}
-
-u32
-icmp_match_out2in_ed (snat_main_t * sm, vlib_node_runtime_t * node,
- u32 thread_index, vlib_buffer_t * b, ip4_header_t * ip,
- u8 * p_proto, snat_session_key_t * p_value,
- u8 * p_dont_translate, void * d, void * e)
-{
- u32 next = ~0, sw_if_index, rx_fib_index;
- icmp46_header_t *icmp;
- nat_ed_ses_key_t key;
- clib_bihash_kv_16_8_t kv, value;
- snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
- snat_session_t *s = 0;
- u8 dont_translate = 0, is_addr_only;
- snat_session_key_t e_key, l_key;
-
- icmp = (icmp46_header_t *) ip4_next_header (ip);
- sw_if_index = vnet_buffer(b)->sw_if_index[VLIB_RX];
- rx_fib_index = ip4_fib_table_get_index_for_sw_if_index (sw_if_index);
-
- if (icmp_get_ed_key (ip, &key))
- {
- b->error = node->errors[SNAT_OUT2IN_ERROR_UNSUPPORTED_PROTOCOL];
- next = SNAT_OUT2IN_NEXT_DROP;
- goto out;
- }
- key.fib_index = rx_fib_index;
- kv.key[0] = key.as_u64[0];
- kv.key[1] = key.as_u64[1];
-
- if (clib_bihash_search_16_8 (&tsm->out2in_ed, &kv, &value))
- {
- /* Try to match static mapping */
- e_key.addr = ip->dst_address;
- e_key.port = key.l_port;
- e_key.protocol = ip_proto_to_snat_proto (key.proto);
- e_key.fib_index = rx_fib_index;
- if (snat_static_mapping_match(sm, e_key, &l_key, 1, &is_addr_only, 0, 0, 0))
- {
- if (!sm->forwarding_enabled)
- {
- /* Don't NAT packet aimed at the intfc address */
- if (PREDICT_FALSE(is_interface_addr(sm, node, sw_if_index,
- ip->dst_address.as_u32)))
- {
- dont_translate = 1;
- goto out;
- }
- b->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
- next = NAT44_ED_OUT2IN_NEXT_DROP;
- goto out;
- }
- else
- {
- dont_translate = 1;
- if (next_src_nat(sm, ip, key.proto, key.l_port, key.r_port,
- thread_index, rx_fib_index))
- {
- next = NAT44_ED_OUT2IN_NEXT_IN2OUT;
- goto out;
- }
- create_bypass_for_fwd(sm, ip, rx_fib_index, thread_index);
- goto out;
- }
- }
-
- if (PREDICT_FALSE(icmp->type != ICMP4_echo_reply &&
- (icmp->type != ICMP4_echo_request || !is_addr_only)))
- {
- b->error = node->errors[SNAT_OUT2IN_ERROR_BAD_ICMP_TYPE];
- next = NAT44_ED_OUT2IN_NEXT_DROP;
- goto out;
- }
-
- /* Create session initiated by host from external network */
- s = create_session_for_static_mapping_ed(sm, b, l_key, e_key, node,
- thread_index, 0, 0,
- vlib_time_now (sm->vlib_main));
-
- if (!s)
- {
- next = NAT44_ED_OUT2IN_NEXT_DROP;
- goto out;
- }
- }
- else
- {
- if (PREDICT_FALSE(icmp->type != ICMP4_echo_reply &&
- icmp->type != ICMP4_echo_request &&
- !icmp_is_error_message (icmp)))
- {
- b->error = node->errors[SNAT_OUT2IN_ERROR_BAD_ICMP_TYPE];
- next = SNAT_OUT2IN_NEXT_DROP;
- goto out;
- }
-
- s = pool_elt_at_index (tsm->sessions, value.value);
- }
-
- *p_proto = ip_proto_to_snat_proto (key.proto);
-out:
- if (s)
- *p_value = s->in2out;
- *p_dont_translate = dont_translate;
- if (d)
- *(snat_session_t**)d = s;
- return next;
-}
-
-static snat_session_t *
-nat44_ed_out2in_unknown_proto (snat_main_t *sm,
- vlib_buffer_t * b,
- ip4_header_t * ip,
- u32 rx_fib_index,
- u32 thread_index,
- f64 now,
- vlib_main_t * vm,
- vlib_node_runtime_t * node)
-{
- clib_bihash_kv_8_8_t kv, value;
- clib_bihash_kv_16_8_t s_kv, s_value;
- snat_static_mapping_t *m;
- u32 old_addr, new_addr;
- ip_csum_t sum;
- snat_session_t * s;
- snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
- snat_user_t *u;
-
- old_addr = ip->dst_address.as_u32;
-
- make_ed_kv (&s_kv, &ip->dst_address, &ip->src_address, ip->protocol,
- rx_fib_index, 0, 0);
-
- if (!clib_bihash_search_16_8 (&tsm->out2in_ed, &s_kv, &s_value))
- {
- s = pool_elt_at_index (tsm->sessions, s_value.value);
- new_addr = ip->dst_address.as_u32 = s->in2out.addr.as_u32;
- }
- else
- {
- if (PREDICT_FALSE (maximum_sessions_exceeded(sm, thread_index)))
- {
- b->error = node->errors[SNAT_OUT2IN_ERROR_MAX_SESSIONS_EXCEEDED];
- nat_log_notice ("maximum sessions exceeded");
- return 0;
- }
-
- make_sm_kv (&kv, &ip->dst_address, 0, 0, 0);
- if (clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value))
- {
- b->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
- return 0;
- }
-
- m = pool_elt_at_index (sm->static_mappings, value.value);
-
- new_addr = ip->dst_address.as_u32 = m->local_addr.as_u32;
-
- u = nat_user_get_or_create (sm, &m->local_addr, m->fib_index,
- thread_index);
- if (!u)
- {
- nat_log_warn ("create NAT user failed");
- return 0;
- }
-
- /* Create a new session */
- s = nat_ed_session_alloc (sm, u, thread_index);
- if (!s)
- {
- nat44_delete_user_with_no_session (sm, u, thread_index);
- nat_log_warn ("create NAT session failed");
- return 0;
- }
-
- s->ext_host_addr.as_u32 = ip->src_address.as_u32;
- s->flags |= SNAT_SESSION_FLAG_UNKNOWN_PROTO;
- s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING;
- s->flags |= SNAT_SESSION_FLAG_ENDPOINT_DEPENDENT;
- s->outside_address_index = ~0;
- s->out2in.addr.as_u32 = old_addr;
- s->out2in.fib_index = rx_fib_index;
- s->in2out.addr.as_u32 = new_addr;
- s->in2out.fib_index = m->fib_index;
- s->in2out.port = s->out2in.port = ip->protocol;
- user_session_increment (sm, u, 1);
-
- /* Add to lookup tables */
- s_kv.value = s - tsm->sessions;
- if (clib_bihash_add_del_16_8 (&tsm->out2in_ed, &s_kv, 1))
- nat_log_notice ("out2in key add failed");
-
- make_ed_kv (&s_kv, &ip->dst_address, &ip->src_address, ip->protocol,
- m->fib_index, 0, 0);
- s_kv.value = s - tsm->sessions;
- if (clib_bihash_add_del_16_8 (&tsm->in2out_ed, &s_kv, 1))
- nat_log_notice ("in2out key add failed");
- }
-
- /* Update IP checksum */
- sum = ip->checksum;
- sum = ip_csum_update (sum, old_addr, new_addr, ip4_header_t, dst_address);
- ip->checksum = ip_csum_fold (sum);
-
- vnet_buffer(b)->sw_if_index[VLIB_TX] = s->in2out.fib_index;
-
- /* Accounting */
- nat44_session_update_counters (s, now,
- vlib_buffer_length_in_chain (vm, b));
-
- return s;
-}
-
-static inline uword
-nat44_ed_out2in_node_fn_inline (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame, int is_slow_path)
-{
- u32 n_left_from, *from, *to_next, pkts_processed = 0, stats_node_index;
- nat44_ed_out2in_next_t next_index;
- snat_main_t *sm = &snat_main;
- f64 now = vlib_time_now (vm);
- u32 thread_index = vm->thread_index;
- snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
-
- stats_node_index = is_slow_path ? nat44_ed_out2in_slowpath_node.index :
- nat44_ed_out2in_node.index;
-
- from = vlib_frame_vector_args (frame);
- n_left_from = frame->n_vectors;
- next_index = node->cached_next_index;
-
- while (n_left_from > 0)
- {
- u32 n_left_to_next;
-
- vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
-
- while (n_left_from >= 4 && n_left_to_next >= 2)
- {
- u32 bi0, bi1;
- vlib_buffer_t *b0, *b1;
- u32 next0, sw_if_index0, rx_fib_index0, proto0, old_addr0, new_addr0;
- u32 next1, sw_if_index1, rx_fib_index1, proto1, old_addr1, new_addr1;
- u16 old_port0, new_port0, old_port1, new_port1;
- ip4_header_t *ip0, *ip1;
- udp_header_t *udp0, *udp1;
- tcp_header_t *tcp0, *tcp1;
- icmp46_header_t *icmp0, *icmp1;
- snat_session_t *s0 = 0, *s1 = 0;
- clib_bihash_kv_16_8_t kv0, value0, kv1, value1;
- ip_csum_t sum0, sum1;
- snat_session_key_t e_key0, l_key0, e_key1, l_key1;
- lb_nat_type_t lb_nat0, lb_nat1;
- twice_nat_type_t twice_nat0, twice_nat1;
-
- /* Prefetch next iteration. */
- {
- vlib_buffer_t * p2, * p3;
-
- p2 = vlib_get_buffer (vm, from[2]);
- p3 = vlib_get_buffer (vm, from[3]);
-
- vlib_prefetch_buffer_header (p2, LOAD);
- vlib_prefetch_buffer_header (p3, LOAD);
-
- CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, STORE);
- CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, STORE);
- }
-
- /* speculatively enqueue b0 and b1 to the current next frame */
- to_next[0] = bi0 = from[0];
- to_next[1] = bi1 = from[1];
- from += 2;
- to_next += 2;
- n_left_from -= 2;
- n_left_to_next -= 2;
-
- b0 = vlib_get_buffer (vm, bi0);
- b1 = vlib_get_buffer (vm, bi1);
-
- next0 = NAT44_ED_OUT2IN_NEXT_LOOKUP;
- vnet_buffer (b0)->snat.flags = 0;
- ip0 = vlib_buffer_get_current (b0);
-
- sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
- rx_fib_index0 = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
- sw_if_index0);
-
- if (PREDICT_FALSE(ip0->ttl == 1))
- {
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
- icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
- ICMP4_time_exceeded_ttl_exceeded_in_transit,
- 0);
- next0 = NAT44_ED_OUT2IN_NEXT_ICMP_ERROR;
- goto trace00;
- }
-
- udp0 = ip4_next_header (ip0);
- tcp0 = (tcp_header_t *) udp0;
- icmp0 = (icmp46_header_t *) udp0;
- proto0 = ip_proto_to_snat_proto (ip0->protocol);
-
- if (is_slow_path)
- {
- if (PREDICT_FALSE (proto0 == ~0))
- {
- s0 = nat44_ed_out2in_unknown_proto(sm, b0, ip0, rx_fib_index0,
- thread_index, now, vm, node);
- if (!sm->forwarding_enabled)
- {
- if (!s0)
- next0 = NAT44_ED_OUT2IN_NEXT_DROP;
- goto trace00;
- }
- }
-
- if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
- {
- next0 = icmp_out2in_ed_slow_path
- (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
- next0, now, thread_index, &s0);
- goto trace00;
- }
- }
- else
- {
- if (PREDICT_FALSE (proto0 == ~0))
- {
- next0 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH;
- goto trace00;
- }
-
- if (ip4_is_fragment (ip0))
- {
- next0 = NAT44_ED_OUT2IN_NEXT_REASS;
- goto trace00;
- }
-
- if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
- {
- next0 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH;
- goto trace00;
- }
- }
-
- make_ed_kv (&kv0, &ip0->dst_address, &ip0->src_address, ip0->protocol,
- rx_fib_index0, udp0->dst_port, udp0->src_port);
-
- if (clib_bihash_search_16_8 (&tsm->out2in_ed, &kv0, &value0))
- {
- if (is_slow_path)
- {
- /* Try to match static mapping by external address and port,
- destination address and port in packet */
- e_key0.addr = ip0->dst_address;
- e_key0.port = udp0->dst_port;
- e_key0.protocol = proto0;
- e_key0.fib_index = rx_fib_index0;
- if (snat_static_mapping_match(sm, e_key0, &l_key0, 1, 0,
- &twice_nat0, &lb_nat0, &ip0->src_address))
- {
- /*
- * Send DHCP packets to the ipv4 stack, or we won't
- * be able to use dhcp client on the outside interface
- */
- if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_UDP
- && (udp0->dst_port ==
- clib_host_to_net_u16(UDP_DST_PORT_dhcp_to_client))))
- {
- vnet_feature_next (&next0, b0);
- goto trace00;
- }
-
- if (!sm->forwarding_enabled)
- {
- b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
- next0 = NAT44_ED_OUT2IN_NEXT_DROP;
- }
- else
- {
- if (next_src_nat(sm, ip0, ip0->protocol,
- udp0->src_port, udp0->dst_port,
- thread_index, rx_fib_index0))
- {
- next0 = NAT44_ED_OUT2IN_NEXT_IN2OUT;
- goto trace00;
- }
- create_bypass_for_fwd(sm, ip0, rx_fib_index0,
- thread_index);
- }
- goto trace00;
- }
-
- /* Create session initiated by host from external network */
- s0 = create_session_for_static_mapping_ed(sm, b0, l_key0,
- e_key0, node,
- thread_index,
- twice_nat0,
- lb_nat0,
- now);
-
- if (!s0)
- {
- next0 = NAT44_ED_OUT2IN_NEXT_DROP;
- goto trace00;
- }
- }
- else
- {
- next0 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH;
- goto trace00;
- }
- }
- else
- {
- s0 = pool_elt_at_index (tsm->sessions, value0.value);
- }
-
- old_addr0 = ip0->dst_address.as_u32;
- new_addr0 = ip0->dst_address.as_u32 = s0->in2out.addr.as_u32;
- vnet_buffer(b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index;
-
- sum0 = ip0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
- dst_address);
- if (PREDICT_FALSE (is_twice_nat_session (s0)))
- sum0 = ip_csum_update (sum0, ip0->src_address.as_u32,
- s0->ext_host_nat_addr.as_u32, ip4_header_t,
- src_address);
- ip0->checksum = ip_csum_fold (sum0);
-
- if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
- {
- old_port0 = tcp0->dst_port;
- new_port0 = tcp0->dst_port = s0->in2out.port;
-
- sum0 = tcp0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
- dst_address);
- sum0 = ip_csum_update (sum0, old_port0, new_port0, ip4_header_t,
- length);
- if (is_twice_nat_session (s0))
- {
- sum0 = ip_csum_update (sum0, ip0->src_address.as_u32,
- s0->ext_host_nat_addr.as_u32,
- ip4_header_t, dst_address);
- sum0 = ip_csum_update (sum0, tcp0->src_port,
- s0->ext_host_nat_port, ip4_header_t,
- length);
- tcp0->src_port = s0->ext_host_nat_port;
- ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32;
- }
- tcp0->checksum = ip_csum_fold(sum0);
- if (nat44_set_tcp_session_state_o2i (sm, s0, tcp0, thread_index))
- goto trace00;
- }
- else
- {
- udp0->dst_port = s0->in2out.port;
- if (is_twice_nat_session (s0))
- {
- udp0->src_port = s0->ext_host_nat_port;
- ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32;
- }
- udp0->checksum = 0;
- }
-
- /* Accounting */
- nat44_session_update_counters (s0, now,
- vlib_buffer_length_in_chain (vm, b0));
-
- trace00:
- if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b0->flags & VLIB_BUFFER_IS_TRACED)))
- {
- nat44_ed_out2in_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->is_slow_path = is_slow_path;
- t->sw_if_index = sw_if_index0;
- t->next_index = next0;
- t->session_index = ~0;
- if (s0)
- t->session_index = s0 - tsm->sessions;
- }
-
- pkts_processed += next0 != NAT44_ED_OUT2IN_NEXT_DROP;
-
- next1 = NAT44_ED_OUT2IN_NEXT_LOOKUP;
- vnet_buffer (b1)->snat.flags = 0;
- ip1 = vlib_buffer_get_current (b1);
-
- sw_if_index1 = vnet_buffer(b1)->sw_if_index[VLIB_RX];
- rx_fib_index1 = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
- sw_if_index1);
-
- if (PREDICT_FALSE(ip1->ttl == 1))
- {
- vnet_buffer (b1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
- icmp4_error_set_vnet_buffer (b1, ICMP4_time_exceeded,
- ICMP4_time_exceeded_ttl_exceeded_in_transit,
- 0);
- next1 = NAT44_ED_OUT2IN_NEXT_ICMP_ERROR;
- goto trace01;
- }
-
- udp1 = ip4_next_header (ip1);
- tcp1 = (tcp_header_t *) udp1;
- icmp1 = (icmp46_header_t *) udp1;
- proto1 = ip_proto_to_snat_proto (ip1->protocol);
-
- if (is_slow_path)
- {
- if (PREDICT_FALSE (proto1 == ~0))
- {
- s1 = nat44_ed_out2in_unknown_proto(sm, b1, ip1, rx_fib_index1,
- thread_index, now, vm, node);
- if (!sm->forwarding_enabled)
- {
- if (!s1)
- next1 = NAT44_ED_OUT2IN_NEXT_DROP;
- goto trace01;
- }
- }
-
- if (PREDICT_FALSE (proto1 == SNAT_PROTOCOL_ICMP))
- {
- next1 = icmp_out2in_ed_slow_path
- (sm, b1, ip1, icmp1, sw_if_index1, rx_fib_index1, node,
- next1, now, thread_index, &s1);
- goto trace01;
- }
- }
- else
- {
- if (PREDICT_FALSE (proto1 == ~0))
- {
- next1 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH;
- goto trace01;
- }
-
- if (ip4_is_fragment (ip1))
- {
- next1 = NAT44_ED_OUT2IN_NEXT_REASS;
- goto trace01;
- }
-
- if (PREDICT_FALSE (proto1 == SNAT_PROTOCOL_ICMP))
- {
- next1 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH;
- goto trace01;
- }
- }
-
- make_ed_kv (&kv1, &ip1->dst_address, &ip1->src_address, ip1->protocol,
- rx_fib_index1, udp1->dst_port, udp1->src_port);
-
- if (clib_bihash_search_16_8 (&tsm->out2in_ed, &kv1, &value1))
- {
- if (is_slow_path)
- {
- /* Try to match static mapping by external address and port,
- destination address and port in packet */
- e_key1.addr = ip1->dst_address;
- e_key1.port = udp1->dst_port;
- e_key1.protocol = proto1;
- e_key1.fib_index = rx_fib_index1;
- if (snat_static_mapping_match(sm, e_key1, &l_key1, 1, 0,
- &twice_nat1, &lb_nat1, &ip1->src_address))
- {
- /*
- * Send DHCP packets to the ipv4 stack, or we won't
- * be able to use dhcp client on the outside interface
- */
- if (PREDICT_FALSE (proto1 == SNAT_PROTOCOL_UDP
- && (udp1->dst_port ==
- clib_host_to_net_u16(UDP_DST_PORT_dhcp_to_client))))
- {
- vnet_feature_next (&next1, b1);
- goto trace01;
- }
-
- if (!sm->forwarding_enabled)
- {
- b1->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
- next1 = NAT44_ED_OUT2IN_NEXT_DROP;
- }
- else
- {
- if (next_src_nat(sm, ip1, ip1->protocol,
- udp1->src_port, udp1->dst_port,
- thread_index, rx_fib_index1))
- {
- next1 = NAT44_ED_OUT2IN_NEXT_IN2OUT;
- goto trace01;
- }
- create_bypass_for_fwd(sm, ip1, rx_fib_index1,
- thread_index);
- }
- goto trace01;
- }
-
- /* Create session initiated by host from external network */
- s1 = create_session_for_static_mapping_ed(sm, b1, l_key1,
- e_key1, node,
- thread_index,
- twice_nat1,
- lb_nat1,
- now);
-
- if (!s1)
- {
- next1 = NAT44_ED_OUT2IN_NEXT_DROP;
- goto trace01;
- }
- }
- else
- {
- next1 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH;
- goto trace01;
- }
- }
- else
- {
- s1 = pool_elt_at_index (tsm->sessions, value1.value);
- }
-
- old_addr1 = ip1->dst_address.as_u32;
- new_addr1 = ip1->dst_address.as_u32 = s1->in2out.addr.as_u32;
- vnet_buffer(b1)->sw_if_index[VLIB_TX] = s1->in2out.fib_index;
-
- sum1 = ip1->checksum;
- sum1 = ip_csum_update (sum1, old_addr1, new_addr1, ip4_header_t,
- dst_address);
- if (PREDICT_FALSE (is_twice_nat_session (s1)))
- sum1 = ip_csum_update (sum1, ip1->src_address.as_u32,
- s1->ext_host_nat_addr.as_u32, ip4_header_t,
- src_address);
- ip1->checksum = ip_csum_fold (sum1);
-
- if (PREDICT_TRUE (proto1 == SNAT_PROTOCOL_TCP))
- {
- old_port1 = tcp1->dst_port;
- new_port1 = tcp1->dst_port = s1->in2out.port;
-
- sum1 = tcp1->checksum;
- sum1 = ip_csum_update (sum1, old_addr1, new_addr1, ip4_header_t,
- dst_address);
- sum1 = ip_csum_update (sum1, old_port1, new_port1, ip4_header_t,
- length);
- if (is_twice_nat_session (s1))
- {
- sum1 = ip_csum_update (sum1, ip1->src_address.as_u32,
- s1->ext_host_nat_addr.as_u32,
- ip4_header_t, dst_address);
- sum1 = ip_csum_update (sum1, tcp1->src_port,
- s1->ext_host_nat_port, ip4_header_t,
- length);
- tcp1->src_port = s1->ext_host_nat_port;
- ip1->src_address.as_u32 = s1->ext_host_nat_addr.as_u32;
- }
- tcp1->checksum = ip_csum_fold(sum1);
- if (nat44_set_tcp_session_state_o2i (sm, s1, tcp1, thread_index))
- goto trace01;
- }
- else
- {
- udp1->dst_port = s1->in2out.port;
- if (is_twice_nat_session (s1))
- {
- udp1->src_port = s1->ext_host_nat_port;
- ip1->src_address.as_u32 = s1->ext_host_nat_addr.as_u32;
- }
- udp1->checksum = 0;
- }
-
- /* Accounting */
- nat44_session_update_counters (s1, now,
- vlib_buffer_length_in_chain (vm, b1));
-
- trace01:
- if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b1->flags & VLIB_BUFFER_IS_TRACED)))
- {
- nat44_ed_out2in_trace_t *t =
- vlib_add_trace (vm, node, b1, sizeof (*t));
- t->is_slow_path = is_slow_path;
- t->sw_if_index = sw_if_index1;
- t->next_index = next1;
- t->session_index = ~0;
- if (s1)
- t->session_index = s1 - tsm->sessions;
- }
-
- pkts_processed += next1 != NAT44_ED_OUT2IN_NEXT_DROP;
-
- /* verify speculative enqueues, maybe switch current next frame */
- vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
- to_next, n_left_to_next,
- bi0, bi1, next0, next1);
- }
-
- while (n_left_from > 0 && n_left_to_next > 0)
- {
- u32 bi0;
- vlib_buffer_t *b0;
- u32 next0, sw_if_index0, rx_fib_index0, proto0, old_addr0, new_addr0;
- u16 old_port0, new_port0;
- ip4_header_t *ip0;
- udp_header_t *udp0;
- tcp_header_t *tcp0;
- icmp46_header_t * icmp0;
- snat_session_t *s0 = 0;
- clib_bihash_kv_16_8_t kv0, value0;
- ip_csum_t sum0;
- snat_session_key_t e_key0, l_key0;
- lb_nat_type_t lb_nat0;
- twice_nat_type_t twice_nat0;
-
- /* speculatively enqueue b0 to the current next frame */
- bi0 = from[0];
- to_next[0] = bi0;
- from += 1;
- to_next += 1;
- n_left_from -= 1;
- n_left_to_next -= 1;
-
- b0 = vlib_get_buffer (vm, bi0);
- next0 = NAT44_ED_OUT2IN_NEXT_LOOKUP;
- vnet_buffer (b0)->snat.flags = 0;
- ip0 = vlib_buffer_get_current (b0);
-
- sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
- rx_fib_index0 = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
- sw_if_index0);
-
- if (PREDICT_FALSE(ip0->ttl == 1))
- {
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
- icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
- ICMP4_time_exceeded_ttl_exceeded_in_transit,
- 0);
- next0 = NAT44_ED_OUT2IN_NEXT_ICMP_ERROR;
- goto trace0;
- }
-
- udp0 = ip4_next_header (ip0);
- tcp0 = (tcp_header_t *) udp0;
- icmp0 = (icmp46_header_t *) udp0;
- proto0 = ip_proto_to_snat_proto (ip0->protocol);
-
- if (is_slow_path)
- {
- if (PREDICT_FALSE (proto0 == ~0))
- {
- s0 = nat44_ed_out2in_unknown_proto(sm, b0, ip0, rx_fib_index0,
- thread_index, now, vm, node);
- if (!sm->forwarding_enabled)
- {
- if (!s0)
- next0 = NAT44_ED_OUT2IN_NEXT_DROP;
- goto trace0;
- }
- }
-
- if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
- {
- next0 = icmp_out2in_ed_slow_path
- (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
- next0, now, thread_index, &s0);
- goto trace0;
- }
- }
- else
- {
- if (PREDICT_FALSE (proto0 == ~0))
- {
- next0 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH;
- goto trace0;
- }
-
- if (ip4_is_fragment (ip0))
- {
- next0 = NAT44_ED_OUT2IN_NEXT_REASS;
- goto trace0;
- }
-
- if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
- {
- next0 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH;
- goto trace0;
- }
- }
-
- make_ed_kv (&kv0, &ip0->dst_address, &ip0->src_address, ip0->protocol,
- rx_fib_index0, udp0->dst_port, udp0->src_port);
-
- if (clib_bihash_search_16_8 (&tsm->out2in_ed, &kv0, &value0))
- {
- if (is_slow_path)
- {
- /* Try to match static mapping by external address and port,
- destination address and port in packet */
- e_key0.addr = ip0->dst_address;
- e_key0.port = udp0->dst_port;
- e_key0.protocol = proto0;
- e_key0.fib_index = rx_fib_index0;
- if (snat_static_mapping_match(sm, e_key0, &l_key0, 1, 0,
- &twice_nat0, &lb_nat0, &ip0->src_address))
- {
- /*
- * Send DHCP packets to the ipv4 stack, or we won't
- * be able to use dhcp client on the outside interface
- */
- if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_UDP
- && (udp0->dst_port ==
- clib_host_to_net_u16(UDP_DST_PORT_dhcp_to_client))))
- {
- vnet_feature_next (&next0, b0);
- goto trace0;
- }
-
- if (!sm->forwarding_enabled)
- {
- b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
- next0 = NAT44_ED_OUT2IN_NEXT_DROP;
- }
- else
- {
- if (next_src_nat(sm, ip0, ip0->protocol,
- udp0->src_port, udp0->dst_port,
- thread_index, rx_fib_index0))
- {
- next0 = NAT44_ED_OUT2IN_NEXT_IN2OUT;
- goto trace0;
- }
- create_bypass_for_fwd(sm, ip0, rx_fib_index0,
- thread_index);
- }
- goto trace0;
- }
-
- /* Create session initiated by host from external network */
- s0 = create_session_for_static_mapping_ed(sm, b0, l_key0,
- e_key0, node,
- thread_index,
- twice_nat0,
- lb_nat0,
- now);
-
- if (!s0)
- {
- next0 = NAT44_ED_OUT2IN_NEXT_DROP;
- goto trace0;
- }
- }
- else
- {
- next0 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH;
- goto trace0;
- }
- }
- else
- {
- s0 = pool_elt_at_index (tsm->sessions, value0.value);
- }
-
- old_addr0 = ip0->dst_address.as_u32;
- new_addr0 = ip0->dst_address.as_u32 = s0->in2out.addr.as_u32;
- vnet_buffer(b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index;
-
- sum0 = ip0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
- dst_address);
- if (PREDICT_FALSE (is_twice_nat_session (s0)))
- sum0 = ip_csum_update (sum0, ip0->src_address.as_u32,
- s0->ext_host_nat_addr.as_u32, ip4_header_t,
- src_address);
- ip0->checksum = ip_csum_fold (sum0);
-
- if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
- {
- old_port0 = tcp0->dst_port;
- new_port0 = tcp0->dst_port = s0->in2out.port;
-
- sum0 = tcp0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
- dst_address);
- sum0 = ip_csum_update (sum0, old_port0, new_port0, ip4_header_t,
- length);
- if (is_twice_nat_session (s0))
- {
- sum0 = ip_csum_update (sum0, ip0->src_address.as_u32,
- s0->ext_host_nat_addr.as_u32,
- ip4_header_t, dst_address);
- sum0 = ip_csum_update (sum0, tcp0->src_port,
- s0->ext_host_nat_port, ip4_header_t,
- length);
- tcp0->src_port = s0->ext_host_nat_port;
- ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32;
- }
- tcp0->checksum = ip_csum_fold(sum0);
- if (nat44_set_tcp_session_state_o2i (sm, s0, tcp0, thread_index))
- goto trace0;
- }
- else
- {
- udp0->dst_port = s0->in2out.port;
- if (is_twice_nat_session (s0))
- {
- udp0->src_port = s0->ext_host_nat_port;
- ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32;
- }
- udp0->checksum = 0;
- }
-
- /* Accounting */
- nat44_session_update_counters (s0, now,
- vlib_buffer_length_in_chain (vm, b0));
-
- trace0:
- if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b0->flags & VLIB_BUFFER_IS_TRACED)))
- {
- nat44_ed_out2in_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->is_slow_path = is_slow_path;
- t->sw_if_index = sw_if_index0;
- t->next_index = next0;
- t->session_index = ~0;
- if (s0)
- t->session_index = s0 - tsm->sessions;
- }
-
- pkts_processed += next0 != NAT44_ED_OUT2IN_NEXT_DROP;
- /* verify speculative enqueue, maybe switch current next frame */
- vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
- to_next, n_left_to_next,
- bi0, next0);
- }
-
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
- }
-
- vlib_node_increment_counter (vm, stats_node_index,
- SNAT_OUT2IN_ERROR_OUT2IN_PACKETS,
- pkts_processed);
- return frame->n_vectors;
-}
-
-static uword
-nat44_ed_out2in_fast_path_fn (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- return nat44_ed_out2in_node_fn_inline (vm, node, frame, 0);
-}
-
-VLIB_REGISTER_NODE (nat44_ed_out2in_node) = {
- .function = nat44_ed_out2in_fast_path_fn,
- .name = "nat44-ed-out2in",
- .vector_size = sizeof (u32),
- .format_trace = format_nat44_ed_out2in_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
-
- .n_errors = ARRAY_LEN(snat_out2in_error_strings),
- .error_strings = snat_out2in_error_strings,
-
- .runtime_data_bytes = sizeof (snat_runtime_t),
-
- .n_next_nodes = NAT44_ED_OUT2IN_N_NEXT,
-
- /* edit / add dispositions here */
- .next_nodes = {
- [NAT44_ED_OUT2IN_NEXT_DROP] = "error-drop",
- [NAT44_ED_OUT2IN_NEXT_LOOKUP] = "ip4-lookup",
- [NAT44_ED_OUT2IN_NEXT_SLOW_PATH] = "nat44-ed-out2in-slowpath",
- [NAT44_ED_OUT2IN_NEXT_ICMP_ERROR] = "ip4-icmp-error",
- [NAT44_ED_OUT2IN_NEXT_IN2OUT] = "nat44-ed-in2out",
- [NAT44_ED_OUT2IN_NEXT_REASS] = "nat44-ed-out2in-reass",
- },
-};
-
-VLIB_NODE_FUNCTION_MULTIARCH (nat44_ed_out2in_node, nat44_ed_out2in_fast_path_fn);
-
-static uword
-nat44_ed_out2in_slow_path_fn (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- return nat44_ed_out2in_node_fn_inline (vm, node, frame, 1);
-}
-
-VLIB_REGISTER_NODE (nat44_ed_out2in_slowpath_node) = {
- .function = nat44_ed_out2in_slow_path_fn,
- .name = "nat44-ed-out2in-slowpath",
- .vector_size = sizeof (u32),
- .format_trace = format_nat44_ed_out2in_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
-
- .n_errors = ARRAY_LEN(snat_out2in_error_strings),
- .error_strings = snat_out2in_error_strings,
-
- .runtime_data_bytes = sizeof (snat_runtime_t),
-
- .n_next_nodes = NAT44_ED_OUT2IN_N_NEXT,
-
- /* edit / add dispositions here */
- .next_nodes = {
- [NAT44_ED_OUT2IN_NEXT_DROP] = "error-drop",
- [NAT44_ED_OUT2IN_NEXT_LOOKUP] = "ip4-lookup",
- [NAT44_ED_OUT2IN_NEXT_SLOW_PATH] = "nat44-ed-out2in-slowpath",
- [NAT44_ED_OUT2IN_NEXT_ICMP_ERROR] = "ip4-icmp-error",
- [NAT44_ED_OUT2IN_NEXT_IN2OUT] = "nat44-ed-in2out",
- [NAT44_ED_OUT2IN_NEXT_REASS] = "nat44-ed-out2in-reass",
- },
-};
-
-VLIB_NODE_FUNCTION_MULTIARCH (nat44_ed_out2in_slowpath_node,
- nat44_ed_out2in_slow_path_fn);
-
-static uword
-nat44_ed_out2in_reass_node_fn (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- u32 n_left_from, *from, *to_next;
- snat_out2in_next_t next_index;
- u32 pkts_processed = 0;
- snat_main_t *sm = &snat_main;
- f64 now = vlib_time_now (vm);
- u32 thread_index = vm->thread_index;
- snat_main_per_thread_data_t *per_thread_data =
- &sm->per_thread_data[thread_index];
- u32 *fragments_to_drop = 0;
- u32 *fragments_to_loopback = 0;
-
- from = vlib_frame_vector_args (frame);
- n_left_from = frame->n_vectors;
- next_index = node->cached_next_index;
-
- while (n_left_from > 0)
- {
- u32 n_left_to_next;
-
- vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
-
- while (n_left_from > 0 && n_left_to_next > 0)
- {
- u32 bi0, sw_if_index0, proto0, rx_fib_index0, new_addr0, old_addr0;
- vlib_buffer_t *b0;
- u32 next0;
- u8 cached0 = 0;
- ip4_header_t *ip0;
- nat_reass_ip4_t *reass0;
- udp_header_t * udp0;
- tcp_header_t * tcp0;
- icmp46_header_t * icmp0;
- clib_bihash_kv_16_8_t kv0, value0;
- snat_session_t * s0 = 0;
- u16 old_port0, new_port0;
- ip_csum_t sum0;
- snat_session_key_t e_key0, l_key0;
- lb_nat_type_t lb0;
- twice_nat_type_t twice_nat0;
-
- /* speculatively enqueue b0 to the current next frame */
- bi0 = from[0];
- to_next[0] = bi0;
- from += 1;
- to_next += 1;
- n_left_from -= 1;
- n_left_to_next -= 1;
-
- b0 = vlib_get_buffer (vm, bi0);
- next0 = NAT44_ED_OUT2IN_NEXT_LOOKUP;
-
- sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
- rx_fib_index0 = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
- sw_if_index0);
-
- if (PREDICT_FALSE (nat_reass_is_drop_frag(0)))
- {
- next0 = NAT44_ED_OUT2IN_NEXT_DROP;
- b0->error = node->errors[SNAT_OUT2IN_ERROR_DROP_FRAGMENT];
- goto trace0;
- }
-
- ip0 = (ip4_header_t *) vlib_buffer_get_current (b0);
- udp0 = ip4_next_header (ip0);
- tcp0 = (tcp_header_t *) udp0;
- icmp0 = (icmp46_header_t *) udp0;
- proto0 = ip_proto_to_snat_proto (ip0->protocol);
-
- reass0 = nat_ip4_reass_find_or_create (ip0->src_address,
- ip0->dst_address,
- ip0->fragment_id,
- ip0->protocol,
- 1,
- &fragments_to_drop);
-
- if (PREDICT_FALSE (!reass0))
- {
- next0 = NAT44_ED_OUT2IN_NEXT_DROP;
- b0->error = node->errors[SNAT_OUT2IN_ERROR_MAX_REASS];
- nat_log_notice ("maximum reassemblies exceeded");
- goto trace0;
- }
-
- if (PREDICT_FALSE (ip4_is_first_fragment (ip0)))
- {
- if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
- {
- next0 = icmp_out2in_slow_path
- (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
- next0, now, thread_index, &s0);
-
- if (PREDICT_TRUE(next0 != NAT44_ED_OUT2IN_NEXT_DROP))
- {
- if (s0)
- reass0->sess_index = s0 - per_thread_data->sessions;
- else
- reass0->flags |= NAT_REASS_FLAG_ED_DONT_TRANSLATE;
- reass0->thread_index = thread_index;
- nat_ip4_reass_get_frags (reass0, &fragments_to_loopback);
- }
-
- goto trace0;
- }
-
- make_ed_kv (&kv0, &ip0->dst_address, &ip0->src_address, ip0->protocol,
- rx_fib_index0, udp0->dst_port, udp0->src_port);
-
- if (clib_bihash_search_16_8 (&per_thread_data->out2in_ed, &kv0, &value0))
- {
- /* Try to match static mapping by external address and port,
- destination address and port in packet */
- e_key0.addr = ip0->dst_address;
- e_key0.port = udp0->dst_port;
- e_key0.protocol = proto0;
- e_key0.fib_index = rx_fib_index0;
- if (snat_static_mapping_match(sm, e_key0, &l_key0, 1, 0,
- &twice_nat0, &lb0, 0))
- {
- /*
- * Send DHCP packets to the ipv4 stack, or we won't
- * be able to use dhcp client on the outside interface
- */
- if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_UDP
- && (udp0->dst_port
- == clib_host_to_net_u16(UDP_DST_PORT_dhcp_to_client))))
- {
- vnet_feature_next(&next0, b0);
- goto trace0;
- }
-
- if (!sm->forwarding_enabled)
- {
- b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
- next0 = NAT44_ED_OUT2IN_NEXT_DROP;
- }
- else
- {
- if (next_src_nat(sm, ip0, ip0->protocol,
- udp0->src_port, udp0->dst_port,
- thread_index, rx_fib_index0))
- {
- next0 = NAT44_ED_OUT2IN_NEXT_IN2OUT;
- goto trace0;
- }
- create_bypass_for_fwd(sm, ip0, rx_fib_index0,
- thread_index);
- reass0->flags |= NAT_REASS_FLAG_ED_DONT_TRANSLATE;
- nat_ip4_reass_get_frags (reass0, &fragments_to_loopback);
- }
- goto trace0;
- }
-
- /* Create session initiated by host from external network */
- s0 = create_session_for_static_mapping_ed(sm, b0, l_key0,
- e_key0, node,
- thread_index,
- twice_nat0, lb0,
- now);
- if (!s0)
- {
- b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
- next0 = NAT44_ED_OUT2IN_NEXT_DROP;
- goto trace0;
- }
- reass0->sess_index = s0 - per_thread_data->sessions;
- reass0->thread_index = thread_index;
- }
- else
- {
- s0 = pool_elt_at_index (per_thread_data->sessions,
- value0.value);
- reass0->sess_index = value0.value;
- }
- nat_ip4_reass_get_frags (reass0, &fragments_to_loopback);
- }
- else
- {
- if (reass0->flags & NAT_REASS_FLAG_ED_DONT_TRANSLATE)
- goto trace0;
- if (PREDICT_FALSE (reass0->sess_index == (u32) ~0))
- {
- if (nat_ip4_reass_add_fragment (reass0, bi0, &fragments_to_drop))
- {
- b0->error = node->errors[SNAT_OUT2IN_ERROR_MAX_FRAG];
- nat_log_notice ("maximum fragments per reassembly exceeded");
- next0 = NAT44_ED_OUT2IN_NEXT_DROP;
- goto trace0;
- }
- cached0 = 1;
- goto trace0;
- }
- s0 = pool_elt_at_index (per_thread_data->sessions,
- reass0->sess_index);
- }
-
- old_addr0 = ip0->dst_address.as_u32;
- ip0->dst_address = s0->in2out.addr;
- new_addr0 = ip0->dst_address.as_u32;
- vnet_buffer(b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index;
-
- sum0 = ip0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
- ip4_header_t,
- dst_address /* changed member */);
- if (PREDICT_FALSE (is_twice_nat_session (s0)))
- sum0 = ip_csum_update (sum0, ip0->src_address.as_u32,
- s0->ext_host_nat_addr.as_u32, ip4_header_t,
- src_address);
- ip0->checksum = ip_csum_fold (sum0);
-
- if (PREDICT_FALSE (ip4_is_first_fragment (ip0)))
- {
- if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP))
- {
- old_port0 = tcp0->dst_port;
- tcp0->dst_port = s0->in2out.port;
- new_port0 = tcp0->dst_port;
-
- sum0 = tcp0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
- ip4_header_t,
- dst_address /* changed member */);
-
- sum0 = ip_csum_update (sum0, old_port0, new_port0,
- ip4_header_t /* cheat */,
- length /* changed member */);
- if (is_twice_nat_session (s0))
- {
- sum0 = ip_csum_update (sum0, ip0->src_address.as_u32,
- s0->ext_host_nat_addr.as_u32,
- ip4_header_t, dst_address);
- sum0 = ip_csum_update (sum0, tcp0->src_port,
- s0->ext_host_nat_port, ip4_header_t,
- length);
- tcp0->src_port = s0->ext_host_nat_port;
- ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32;
- }
- tcp0->checksum = ip_csum_fold(sum0);
- }
- else
- {
- old_port0 = udp0->dst_port;
- udp0->dst_port = s0->in2out.port;
- if (is_twice_nat_session (s0))
- {
- udp0->src_port = s0->ext_host_nat_port;
- ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32;
- }
- udp0->checksum = 0;
- }
- }
-
- /* Accounting */
- nat44_session_update_counters (s0, now,
- vlib_buffer_length_in_chain (vm, b0));
- /* Per-user LRU list maintenance */
- nat44_session_update_lru (sm, s0, thread_index);
-
- trace0:
- if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b0->flags & VLIB_BUFFER_IS_TRACED)))
- {
- nat44_out2in_reass_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->cached = cached0;
- t->sw_if_index = sw_if_index0;
- t->next_index = next0;
- }
-
- if (cached0)
- {
- n_left_to_next++;
- to_next--;
- }
- else
- {
- pkts_processed += next0 != NAT44_ED_OUT2IN_NEXT_DROP;
-
- /* verify speculative enqueue, maybe switch current next frame */
- vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
- to_next, n_left_to_next,
- bi0, next0);
- }
-
- if (n_left_from == 0 && vec_len (fragments_to_loopback))
- {
- from = vlib_frame_vector_args (frame);
- u32 len = vec_len (fragments_to_loopback);
- if (len <= VLIB_FRAME_SIZE)
- {
- clib_memcpy (from, fragments_to_loopback, sizeof (u32) * len);
- n_left_from = len;
- vec_reset_length (fragments_to_loopback);
- }
- else
- {
- clib_memcpy (from,
- fragments_to_loopback + (len - VLIB_FRAME_SIZE),
- sizeof (u32) * VLIB_FRAME_SIZE);
- n_left_from = VLIB_FRAME_SIZE;
- _vec_len (fragments_to_loopback) = len - VLIB_FRAME_SIZE;
- }
- }
- }
-
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
- }
-
- vlib_node_increment_counter (vm, nat44_out2in_reass_node.index,
- SNAT_OUT2IN_ERROR_OUT2IN_PACKETS,
- pkts_processed);
-
- nat_send_all_to_node (vm, fragments_to_drop, node,
- &node->errors[SNAT_OUT2IN_ERROR_DROP_FRAGMENT],
- SNAT_OUT2IN_NEXT_DROP);
-
- vec_free (fragments_to_drop);
- vec_free (fragments_to_loopback);
- return frame->n_vectors;
-}
-
-VLIB_REGISTER_NODE (nat44_ed_out2in_reass_node) = {
- .function = nat44_ed_out2in_reass_node_fn,
- .name = "nat44-ed-out2in-reass",
- .vector_size = sizeof (u32),
- .format_trace = format_nat44_out2in_reass_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
-
- .n_errors = ARRAY_LEN(snat_out2in_error_strings),
- .error_strings = snat_out2in_error_strings,
-
- .n_next_nodes = NAT44_ED_OUT2IN_N_NEXT,
-
- /* edit / add dispositions here */
- .next_nodes = {
- [NAT44_ED_OUT2IN_NEXT_DROP] = "error-drop",
- [NAT44_ED_OUT2IN_NEXT_LOOKUP] = "ip4-lookup",
- [NAT44_ED_OUT2IN_NEXT_SLOW_PATH] = "nat44-ed-out2in-slowpath",
- [NAT44_ED_OUT2IN_NEXT_ICMP_ERROR] = "ip4-icmp-error",
- [NAT44_ED_OUT2IN_NEXT_IN2OUT] = "nat44-ed-in2out",
- [NAT44_ED_OUT2IN_NEXT_REASS] = "nat44-ed-out2in-reass",
- },
-};
-
-VLIB_NODE_FUNCTION_MULTIARCH (nat44_ed_out2in_reass_node,
- nat44_ed_out2in_reass_node_fn);
-
-/**************************/
-/*** deterministic mode ***/
-/**************************/
-static uword
-snat_det_out2in_node_fn (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- u32 n_left_from, * from, * to_next;
+ u32 n_left_from, *from, *to_next;
snat_out2in_next_t next_index;
u32 pkts_processed = 0;
- snat_main_t * sm = &snat_main;
- u32 thread_index = vm->thread_index;
+ snat_main_t *sm = &snat_main;
from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
{
u32 n_left_to_next;
- vlib_get_next_frame (vm, node, next_index,
- to_next, n_left_to_next);
-
- while (n_left_from >= 4 && n_left_to_next >= 2)
- {
- u32 bi0, bi1;
- vlib_buffer_t * b0, * b1;
- u32 next0 = SNAT_OUT2IN_NEXT_LOOKUP;
- u32 next1 = SNAT_OUT2IN_NEXT_LOOKUP;
- u32 sw_if_index0, sw_if_index1;
- ip4_header_t * ip0, * ip1;
- ip_csum_t sum0, sum1;
- ip4_address_t new_addr0, old_addr0, new_addr1, old_addr1;
- u16 new_port0, old_port0, old_port1, new_port1;
- udp_header_t * udp0, * udp1;
- tcp_header_t * tcp0, * tcp1;
- u32 proto0, proto1;
- snat_det_out_key_t key0, key1;
- snat_det_map_t * dm0, * dm1;
- snat_det_session_t * ses0 = 0, * ses1 = 0;
- u32 rx_fib_index0, rx_fib_index1;
- icmp46_header_t * icmp0, * icmp1;
-
- /* Prefetch next iteration. */
- {
- vlib_buffer_t * p2, * p3;
-
- p2 = vlib_get_buffer (vm, from[2]);
- p3 = vlib_get_buffer (vm, from[3]);
-
- vlib_prefetch_buffer_header (p2, LOAD);
- vlib_prefetch_buffer_header (p3, LOAD);
-
- CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, STORE);
- CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, STORE);
- }
-
- /* speculatively enqueue b0 and b1 to the current next frame */
- to_next[0] = bi0 = from[0];
- to_next[1] = bi1 = from[1];
- from += 2;
- to_next += 2;
- n_left_from -= 2;
- n_left_to_next -= 2;
-
- b0 = vlib_get_buffer (vm, bi0);
- b1 = vlib_get_buffer (vm, bi1);
-
- ip0 = vlib_buffer_get_current (b0);
- udp0 = ip4_next_header (ip0);
- tcp0 = (tcp_header_t *) udp0;
-
- sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
-
- if (PREDICT_FALSE(ip0->ttl == 1))
- {
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
- icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
- ICMP4_time_exceeded_ttl_exceeded_in_transit,
- 0);
- next0 = SNAT_OUT2IN_NEXT_ICMP_ERROR;
- goto trace0;
- }
-
- proto0 = ip_proto_to_snat_proto (ip0->protocol);
-
- if (PREDICT_FALSE(proto0 == SNAT_PROTOCOL_ICMP))
- {
- rx_fib_index0 = ip4_fib_table_get_index_for_sw_if_index(sw_if_index0);
- icmp0 = (icmp46_header_t *) udp0;
-
- next0 = icmp_out2in(sm, b0, ip0, icmp0, sw_if_index0,
- rx_fib_index0, node, next0, thread_index,
- &ses0, &dm0);
- goto trace0;
- }
-
- key0.ext_host_addr = ip0->src_address;
- key0.ext_host_port = tcp0->src;
- key0.out_port = tcp0->dst;
-
- dm0 = snat_det_map_by_out(sm, &ip0->dst_address);
- if (PREDICT_FALSE(!dm0))
- {
- nat_log_info ("unknown dst address: %U",
- format_ip4_address, &ip0->dst_address);
- next0 = SNAT_OUT2IN_NEXT_DROP;
- b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
- goto trace0;
- }
-
- snat_det_reverse(dm0, &ip0->dst_address,
- clib_net_to_host_u16(tcp0->dst), &new_addr0);
-
- ses0 = snat_det_get_ses_by_out (dm0, &new_addr0, key0.as_u64);
- if (PREDICT_FALSE(!ses0))
- {
- nat_log_info ("no match src %U:%d dst %U:%d for user %U",
- format_ip4_address, &ip0->src_address,
- clib_net_to_host_u16 (tcp0->src),
- format_ip4_address, &ip0->dst_address,
- clib_net_to_host_u16 (tcp0->dst),
- format_ip4_address, &new_addr0);
- next0 = SNAT_OUT2IN_NEXT_DROP;
- b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
- goto trace0;
- }
- new_port0 = ses0->in_port;
-
- old_addr0 = ip0->dst_address;
- ip0->dst_address = new_addr0;
- vnet_buffer(b0)->sw_if_index[VLIB_TX] = sm->inside_fib_index;
-
- sum0 = ip0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0.as_u32, new_addr0.as_u32,
- ip4_header_t,
- dst_address /* changed member */);
- ip0->checksum = ip_csum_fold (sum0);
-
- if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP))
- {
- if (tcp0->flags & TCP_FLAG_FIN && ses0->state == SNAT_SESSION_TCP_ESTABLISHED)
- ses0->state = SNAT_SESSION_TCP_CLOSE_WAIT;
- else if (tcp0->flags & TCP_FLAG_ACK && ses0->state == SNAT_SESSION_TCP_LAST_ACK)
- snat_det_ses_close(dm0, ses0);
-
- old_port0 = tcp0->dst;
- tcp0->dst = new_port0;
-
- sum0 = tcp0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0.as_u32, new_addr0.as_u32,
- ip4_header_t,
- dst_address /* changed member */);
-
- sum0 = ip_csum_update (sum0, old_port0, new_port0,
- ip4_header_t /* cheat */,
- length /* changed member */);
- tcp0->checksum = ip_csum_fold(sum0);
- }
- else
- {
- old_port0 = udp0->dst_port;
- udp0->dst_port = new_port0;
- udp0->checksum = 0;
- }
-
- trace0:
-
- if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b0->flags & VLIB_BUFFER_IS_TRACED)))
- {
- snat_out2in_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->sw_if_index = sw_if_index0;
- t->next_index = next0;
- t->session_index = ~0;
- if (ses0)
- t->session_index = ses0 - dm0->sessions;
- }
-
- pkts_processed += next0 != SNAT_OUT2IN_NEXT_DROP;
-
- b1 = vlib_get_buffer (vm, bi1);
-
- ip1 = vlib_buffer_get_current (b1);
- udp1 = ip4_next_header (ip1);
- tcp1 = (tcp_header_t *) udp1;
-
- sw_if_index1 = vnet_buffer(b1)->sw_if_index[VLIB_RX];
-
- if (PREDICT_FALSE(ip1->ttl == 1))
- {
- vnet_buffer (b1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
- icmp4_error_set_vnet_buffer (b1, ICMP4_time_exceeded,
- ICMP4_time_exceeded_ttl_exceeded_in_transit,
- 0);
- next1 = SNAT_OUT2IN_NEXT_ICMP_ERROR;
- goto trace1;
- }
-
- proto1 = ip_proto_to_snat_proto (ip1->protocol);
-
- if (PREDICT_FALSE(proto1 == SNAT_PROTOCOL_ICMP))
- {
- rx_fib_index1 = ip4_fib_table_get_index_for_sw_if_index(sw_if_index1);
- icmp1 = (icmp46_header_t *) udp1;
-
- next1 = icmp_out2in(sm, b1, ip1, icmp1, sw_if_index1,
- rx_fib_index1, node, next1, thread_index,
- &ses1, &dm1);
- goto trace1;
- }
-
- key1.ext_host_addr = ip1->src_address;
- key1.ext_host_port = tcp1->src;
- key1.out_port = tcp1->dst;
-
- dm1 = snat_det_map_by_out(sm, &ip1->dst_address);
- if (PREDICT_FALSE(!dm1))
- {
- nat_log_info ("unknown dst address: %U",
- format_ip4_address, &ip1->dst_address);
- next1 = SNAT_OUT2IN_NEXT_DROP;
- b1->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
- goto trace1;
- }
-
- snat_det_reverse(dm1, &ip1->dst_address,
- clib_net_to_host_u16(tcp1->dst), &new_addr1);
-
- ses1 = snat_det_get_ses_by_out (dm1, &new_addr1, key1.as_u64);
- if (PREDICT_FALSE(!ses1))
- {
- nat_log_info ("no match src %U:%d dst %U:%d for user %U",
- format_ip4_address, &ip1->src_address,
- clib_net_to_host_u16 (tcp1->src),
- format_ip4_address, &ip1->dst_address,
- clib_net_to_host_u16 (tcp1->dst),
- format_ip4_address, &new_addr1);
- next1 = SNAT_OUT2IN_NEXT_DROP;
- b1->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
- goto trace1;
- }
- new_port1 = ses1->in_port;
-
- old_addr1 = ip1->dst_address;
- ip1->dst_address = new_addr1;
- vnet_buffer(b1)->sw_if_index[VLIB_TX] = sm->inside_fib_index;
-
- sum1 = ip1->checksum;
- sum1 = ip_csum_update (sum1, old_addr1.as_u32, new_addr1.as_u32,
- ip4_header_t,
- dst_address /* changed member */);
- ip1->checksum = ip_csum_fold (sum1);
-
- if (PREDICT_TRUE(proto1 == SNAT_PROTOCOL_TCP))
- {
- if (tcp1->flags & TCP_FLAG_FIN && ses1->state == SNAT_SESSION_TCP_ESTABLISHED)
- ses1->state = SNAT_SESSION_TCP_CLOSE_WAIT;
- else if (tcp1->flags & TCP_FLAG_ACK && ses1->state == SNAT_SESSION_TCP_LAST_ACK)
- snat_det_ses_close(dm1, ses1);
-
- old_port1 = tcp1->dst;
- tcp1->dst = new_port1;
-
- sum1 = tcp1->checksum;
- sum1 = ip_csum_update (sum1, old_addr1.as_u32, new_addr1.as_u32,
- ip4_header_t,
- dst_address /* changed member */);
-
- sum1 = ip_csum_update (sum1, old_port1, new_port1,
- ip4_header_t /* cheat */,
- length /* changed member */);
- tcp1->checksum = ip_csum_fold(sum1);
- }
- else
- {
- old_port1 = udp1->dst_port;
- udp1->dst_port = new_port1;
- udp1->checksum = 0;
- }
-
- trace1:
-
- if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b1->flags & VLIB_BUFFER_IS_TRACED)))
- {
- snat_out2in_trace_t *t =
- vlib_add_trace (vm, node, b1, sizeof (*t));
- t->sw_if_index = sw_if_index1;
- t->next_index = next1;
- t->session_index = ~0;
- if (ses1)
- t->session_index = ses1 - dm1->sessions;
- }
-
- pkts_processed += next1 != SNAT_OUT2IN_NEXT_DROP;
-
- /* verify speculative enqueues, maybe switch current next frame */
- vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
- to_next, n_left_to_next,
- bi0, bi1, next0, next1);
- }
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
while (n_left_from > 0 && n_left_to_next > 0)
{
- u32 bi0;
- vlib_buffer_t * b0;
- u32 next0 = SNAT_OUT2IN_NEXT_LOOKUP;
- u32 sw_if_index0;
- ip4_header_t * ip0;
- ip_csum_t sum0;
- ip4_address_t new_addr0, old_addr0;
- u16 new_port0, old_port0;
- udp_header_t * udp0;
- tcp_header_t * tcp0;
- u32 proto0;
- snat_det_out_key_t key0;
- snat_det_map_t * dm0;
- snat_det_session_t * ses0 = 0;
- u32 rx_fib_index0;
- icmp46_header_t * icmp0;
-
- /* speculatively enqueue b0 to the current next frame */
+ u32 bi0;
+ vlib_buffer_t *b0;
+ u32 next0 = SNAT_OUT2IN_NEXT_DROP;
+ u32 sw_if_index0;
+ ip4_header_t *ip0;
+ ip_csum_t sum0;
+ u32 new_addr0, old_addr0;
+ u16 new_port0, old_port0;
+ udp_header_t *udp0;
+ tcp_header_t *tcp0;
+ icmp46_header_t *icmp0;
+ snat_session_key_t key0, sm0;
+ u32 proto0;
+ u32 rx_fib_index0;
+
+ /* speculatively enqueue b0 to the current next frame */
bi0 = from[0];
to_next[0] = bi0;
from += 1;
b0 = vlib_get_buffer (vm, bi0);
- ip0 = vlib_buffer_get_current (b0);
- udp0 = ip4_next_header (ip0);
- tcp0 = (tcp_header_t *) udp0;
-
- sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
-
- if (PREDICT_FALSE(ip0->ttl == 1))
- {
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
- icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
- ICMP4_time_exceeded_ttl_exceeded_in_transit,
- 0);
- next0 = SNAT_OUT2IN_NEXT_ICMP_ERROR;
- goto trace00;
- }
-
- proto0 = ip_proto_to_snat_proto (ip0->protocol);
-
- if (PREDICT_FALSE(proto0 == SNAT_PROTOCOL_ICMP))
- {
- rx_fib_index0 = ip4_fib_table_get_index_for_sw_if_index(sw_if_index0);
- icmp0 = (icmp46_header_t *) udp0;
-
- next0 = icmp_out2in(sm, b0, ip0, icmp0, sw_if_index0,
- rx_fib_index0, node, next0, thread_index,
- &ses0, &dm0);
- goto trace00;
- }
-
- key0.ext_host_addr = ip0->src_address;
- key0.ext_host_port = tcp0->src;
- key0.out_port = tcp0->dst;
-
- dm0 = snat_det_map_by_out(sm, &ip0->dst_address);
- if (PREDICT_FALSE(!dm0))
- {
- nat_log_info ("unknown dst address: %U",
- format_ip4_address, &ip0->dst_address);
- next0 = SNAT_OUT2IN_NEXT_DROP;
- b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
- goto trace00;
- }
-
- snat_det_reverse(dm0, &ip0->dst_address,
- clib_net_to_host_u16(tcp0->dst), &new_addr0);
-
- ses0 = snat_det_get_ses_by_out (dm0, &new_addr0, key0.as_u64);
- if (PREDICT_FALSE(!ses0))
- {
- nat_log_info ("no match src %U:%d dst %U:%d for user %U",
- format_ip4_address, &ip0->src_address,
- clib_net_to_host_u16 (tcp0->src),
- format_ip4_address, &ip0->dst_address,
- clib_net_to_host_u16 (tcp0->dst),
- format_ip4_address, &new_addr0);
- next0 = SNAT_OUT2IN_NEXT_DROP;
- b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
- goto trace00;
- }
- new_port0 = ses0->in_port;
-
- old_addr0 = ip0->dst_address;
- ip0->dst_address = new_addr0;
- vnet_buffer(b0)->sw_if_index[VLIB_TX] = sm->inside_fib_index;
-
- sum0 = ip0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0.as_u32, new_addr0.as_u32,
- ip4_header_t,
- dst_address /* changed member */);
- ip0->checksum = ip_csum_fold (sum0);
-
- if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP))
- {
- if (tcp0->flags & TCP_FLAG_FIN && ses0->state == SNAT_SESSION_TCP_ESTABLISHED)
- ses0->state = SNAT_SESSION_TCP_CLOSE_WAIT;
- else if (tcp0->flags & TCP_FLAG_ACK && ses0->state == SNAT_SESSION_TCP_LAST_ACK)
- snat_det_ses_close(dm0, ses0);
-
- old_port0 = tcp0->dst;
- tcp0->dst = new_port0;
-
- sum0 = tcp0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0.as_u32, new_addr0.as_u32,
- ip4_header_t,
- dst_address /* changed member */);
-
- sum0 = ip_csum_update (sum0, old_port0, new_port0,
- ip4_header_t /* cheat */,
- length /* changed member */);
- tcp0->checksum = ip_csum_fold(sum0);
- }
- else
- {
- old_port0 = udp0->dst_port;
- udp0->dst_port = new_port0;
- udp0->checksum = 0;
- }
-
- trace00:
-
- if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b0->flags & VLIB_BUFFER_IS_TRACED)))
- {
- snat_out2in_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->sw_if_index = sw_if_index0;
- t->next_index = next0;
- t->session_index = ~0;
- if (ses0)
- t->session_index = ses0 - dm0->sessions;
- }
-
- pkts_processed += next0 != SNAT_OUT2IN_NEXT_DROP;
-
- /* verify speculative enqueue, maybe switch current next frame */
- vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
- to_next, n_left_to_next,
- bi0, next0);
- }
-
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
- }
-
- vlib_node_increment_counter (vm, snat_det_out2in_node.index,
- SNAT_OUT2IN_ERROR_OUT2IN_PACKETS,
- pkts_processed);
- return frame->n_vectors;
-}
-
-VLIB_REGISTER_NODE (snat_det_out2in_node) = {
- .function = snat_det_out2in_node_fn,
- .name = "nat44-det-out2in",
- .vector_size = sizeof (u32),
- .format_trace = format_snat_out2in_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
-
- .n_errors = ARRAY_LEN(snat_out2in_error_strings),
- .error_strings = snat_out2in_error_strings,
-
- .runtime_data_bytes = sizeof (snat_runtime_t),
-
- .n_next_nodes = SNAT_OUT2IN_N_NEXT,
-
- /* edit / add dispositions here */
- .next_nodes = {
- [SNAT_OUT2IN_NEXT_DROP] = "error-drop",
- [SNAT_OUT2IN_NEXT_LOOKUP] = "ip4-lookup",
- [SNAT_OUT2IN_NEXT_ICMP_ERROR] = "ip4-icmp-error",
- [SNAT_OUT2IN_NEXT_REASS] = "nat44-out2in-reass",
- },
-};
-VLIB_NODE_FUNCTION_MULTIARCH (snat_det_out2in_node, snat_det_out2in_node_fn);
-
-/**
- * Get address and port values to be used for ICMP packet translation
- * and create session if needed
- *
- * @param[in,out] sm NAT main
- * @param[in,out] node NAT node runtime
- * @param[in] thread_index thread index
- * @param[in,out] b0 buffer containing packet to be translated
- * @param[out] p_proto protocol used for matching
- * @param[out] p_value address and port after NAT translation
- * @param[out] p_dont_translate if packet should not be translated
- * @param d optional parameter
- * @param e optional parameter
- */
-u32 icmp_match_out2in_det(snat_main_t *sm, vlib_node_runtime_t *node,
- u32 thread_index, vlib_buffer_t *b0,
- ip4_header_t *ip0, u8 *p_proto,
- snat_session_key_t *p_value,
- u8 *p_dont_translate, void *d, void *e)
-{
- icmp46_header_t *icmp0;
- u32 sw_if_index0;
- u8 protocol;
- snat_det_out_key_t key0;
- u8 dont_translate = 0;
- u32 next0 = ~0;
- icmp_echo_header_t *echo0, *inner_echo0 = 0;
- ip4_header_t *inner_ip0;
- void *l4_header = 0;
- icmp46_header_t *inner_icmp0;
- snat_det_map_t * dm0 = 0;
- ip4_address_t new_addr0 = {{0}};
- snat_det_session_t * ses0 = 0;
- ip4_address_t out_addr;
-
- icmp0 = (icmp46_header_t *) ip4_next_header (ip0);
- echo0 = (icmp_echo_header_t *)(icmp0+1);
- sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
-
- if (!icmp_is_error_message (icmp0))
- {
- protocol = SNAT_PROTOCOL_ICMP;
- key0.ext_host_addr = ip0->src_address;
- key0.ext_host_port = 0;
- key0.out_port = echo0->identifier;
- out_addr = ip0->dst_address;
- }
- else
- {
- inner_ip0 = (ip4_header_t *)(echo0+1);
- l4_header = ip4_next_header (inner_ip0);
- protocol = ip_proto_to_snat_proto (inner_ip0->protocol);
- key0.ext_host_addr = inner_ip0->dst_address;
- out_addr = inner_ip0->src_address;
- switch (protocol)
- {
- case SNAT_PROTOCOL_ICMP:
- inner_icmp0 = (icmp46_header_t*)l4_header;
- inner_echo0 = (icmp_echo_header_t *)(inner_icmp0+1);
- key0.ext_host_port = 0;
- key0.out_port = inner_echo0->identifier;
- break;
- case SNAT_PROTOCOL_UDP:
- case SNAT_PROTOCOL_TCP:
- key0.ext_host_port = ((tcp_udp_header_t*)l4_header)->dst_port;
- key0.out_port = ((tcp_udp_header_t*)l4_header)->src_port;
- break;
- default:
- b0->error = node->errors[SNAT_OUT2IN_ERROR_UNSUPPORTED_PROTOCOL];
- next0 = SNAT_OUT2IN_NEXT_DROP;
- goto out;
- }
- }
-
- dm0 = snat_det_map_by_out(sm, &out_addr);
- if (PREDICT_FALSE(!dm0))
- {
- /* Don't NAT packet aimed at the intfc address */
- if (PREDICT_FALSE(is_interface_addr(sm, node, sw_if_index0,
- ip0->dst_address.as_u32)))
- {
- dont_translate = 1;
- goto out;
- }
- nat_log_info ("unknown dst address: %U",
- format_ip4_address, &ip0->dst_address);
- goto out;
- }
-
- snat_det_reverse(dm0, &ip0->dst_address,
- clib_net_to_host_u16(key0.out_port), &new_addr0);
-
- ses0 = snat_det_get_ses_by_out (dm0, &new_addr0, key0.as_u64);
- if (PREDICT_FALSE(!ses0))
- {
- /* Don't NAT packet aimed at the intfc address */
- if (PREDICT_FALSE(is_interface_addr(sm, node, sw_if_index0,
- ip0->dst_address.as_u32)))
- {
- dont_translate = 1;
- goto out;
- }
- nat_log_info ("no match src %U:%d dst %U:%d for user %U",
- format_ip4_address, &key0.ext_host_addr,
- clib_net_to_host_u16 (key0.ext_host_port),
- format_ip4_address, &out_addr,
- clib_net_to_host_u16 (key0.out_port),
- format_ip4_address, &new_addr0);
- b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
- next0 = SNAT_OUT2IN_NEXT_DROP;
- goto out;
- }
-
- if (PREDICT_FALSE(icmp0->type != ICMP4_echo_reply &&
- !icmp_is_error_message (icmp0)))
- {
- b0->error = node->errors[SNAT_OUT2IN_ERROR_BAD_ICMP_TYPE];
- next0 = SNAT_OUT2IN_NEXT_DROP;
- goto out;
- }
-
- goto out;
+ ip0 = vlib_buffer_get_current (b0);
+ udp0 = ip4_next_header (ip0);
+ tcp0 = (tcp_header_t *) udp0;
+ icmp0 = (icmp46_header_t *) udp0;
-out:
- *p_proto = protocol;
- if (ses0)
- {
- p_value->addr = new_addr0;
- p_value->fib_index = sm->inside_fib_index;
- p_value->port = ses0->in_port;
- }
- *p_dont_translate = dont_translate;
- if (d)
- *(snat_det_session_t**)d = ses0;
- if (e)
- *(snat_det_map_t**)e = dm0;
- return next0;
-}
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+ rx_fib_index0 =
+ ip4_fib_table_get_index_for_sw_if_index (sw_if_index0);
-/**********************/
-/*** worker handoff ***/
-/**********************/
-static uword
-snat_out2in_worker_handoff_fn (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- snat_main_t *sm = &snat_main;
- vlib_thread_main_t *tm = vlib_get_thread_main ();
- u32 n_left_from, *from, *to_next = 0, *to_next_drop = 0;
- static __thread vlib_frame_queue_elt_t **handoff_queue_elt_by_worker_index;
- static __thread vlib_frame_queue_t **congested_handoff_queue_by_worker_index
- = 0;
- vlib_frame_queue_elt_t *hf = 0;
- vlib_frame_queue_t *fq;
- vlib_frame_t *f = 0;
- int i;
- u32 n_left_to_next_worker = 0, *to_next_worker = 0;
- u32 next_worker_index = 0;
- u32 current_worker_index = ~0;
- u32 thread_index = vm->thread_index;
- vlib_frame_t *d = 0;
+ vnet_feature_next (&next0, b0);
- ASSERT (vec_len (sm->workers));
+ if (PREDICT_FALSE (ip0->ttl == 1))
+ {
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
+ icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
+ ICMP4_time_exceeded_ttl_exceeded_in_transit,
+ 0);
+ next0 = SNAT_OUT2IN_NEXT_ICMP_ERROR;
+ goto trace00;
+ }
- if (PREDICT_FALSE (handoff_queue_elt_by_worker_index == 0))
- {
- vec_validate (handoff_queue_elt_by_worker_index, tm->n_vlib_mains - 1);
+ proto0 = ip_proto_to_snat_proto (ip0->protocol);
- vec_validate_init_empty (congested_handoff_queue_by_worker_index,
- tm->n_vlib_mains - 1,
- (vlib_frame_queue_t *) (~0));
- }
+ if (PREDICT_FALSE (proto0 == ~0))
+ goto trace00;
- from = vlib_frame_vector_args (frame);
- n_left_from = frame->n_vectors;
+ if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
+ {
+ next0 = icmp_out2in (sm, b0, ip0, icmp0, sw_if_index0,
+ rx_fib_index0, node, next0, ~0, 0, 0);
+ goto trace00;
+ }
- while (n_left_from > 0)
- {
- u32 bi0;
- vlib_buffer_t *b0;
- u32 sw_if_index0;
- u32 rx_fib_index0;
- ip4_header_t * ip0;
- u8 do_handoff;
-
- bi0 = from[0];
- from += 1;
- n_left_from -= 1;
-
- b0 = vlib_get_buffer (vm, bi0);
-
- sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
- rx_fib_index0 = ip4_fib_table_get_index_for_sw_if_index(sw_if_index0);
-
- ip0 = vlib_buffer_get_current (b0);
-
- next_worker_index = sm->worker_out2in_cb(ip0, rx_fib_index0);
-
- if (PREDICT_FALSE (next_worker_index != thread_index))
- {
- do_handoff = 1;
-
- if (next_worker_index != current_worker_index)
- {
- fq = is_vlib_frame_queue_congested (
- sm->fq_out2in_index, next_worker_index, NAT_FQ_NELTS - 2,
- congested_handoff_queue_by_worker_index);
-
- if (fq)
- {
- /* if this is 1st frame */
- if (!d)
- {
- d = vlib_get_frame_to_node (vm, sm->error_node_index);
- to_next_drop = vlib_frame_vector_args (d);
- }
-
- to_next_drop[0] = bi0;
- to_next_drop += 1;
- d->n_vectors++;
- b0->error = node->errors[SNAT_OUT2IN_ERROR_FQ_CONGESTED];
- goto trace0;
- }
-
- if (hf)
- hf->n_vectors = VLIB_FRAME_SIZE - n_left_to_next_worker;
-
- hf = vlib_get_worker_handoff_queue_elt (sm->fq_out2in_index,
- next_worker_index,
- handoff_queue_elt_by_worker_index);
-
- n_left_to_next_worker = VLIB_FRAME_SIZE - hf->n_vectors;
- to_next_worker = &hf->buffer_index[hf->n_vectors];
- current_worker_index = next_worker_index;
- }
-
- /* enqueue to correct worker thread */
- to_next_worker[0] = bi0;
- to_next_worker++;
- n_left_to_next_worker--;
-
- if (n_left_to_next_worker == 0)
- {
- hf->n_vectors = VLIB_FRAME_SIZE;
- vlib_put_frame_queue_elt (hf);
- current_worker_index = ~0;
- handoff_queue_elt_by_worker_index[next_worker_index] = 0;
- hf = 0;
- }
- }
- else
- {
- do_handoff = 0;
- /* if this is 1st frame */
- if (!f)
- {
- f = vlib_get_frame_to_node (vm, sm->out2in_node_index);
- to_next = vlib_frame_vector_args (f);
- }
-
- to_next[0] = bi0;
- to_next += 1;
- f->n_vectors++;
- }
-
-trace0:
- if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b0->flags & VLIB_BUFFER_IS_TRACED)))
- {
- snat_out2in_worker_handoff_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->next_worker_index = next_worker_index;
- t->do_handoff = do_handoff;
- }
- }
+ key0.addr = ip0->dst_address;
+ key0.port = udp0->dst_port;
+ key0.fib_index = rx_fib_index0;
- if (f)
- vlib_put_frame_to_node (vm, sm->out2in_node_index, f);
+ if (snat_static_mapping_match (sm, key0, &sm0, 1, 0, 0, 0, 0))
+ {
+ b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
+ goto trace00;
+ }
- if (d)
- vlib_put_frame_to_node (vm, sm->error_node_index, d);
+ new_addr0 = sm0.addr.as_u32;
+ new_port0 = sm0.port;
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = sm0.fib_index;
+ old_addr0 = ip0->dst_address.as_u32;
+ ip0->dst_address.as_u32 = new_addr0;
- if (hf)
- hf->n_vectors = VLIB_FRAME_SIZE - n_left_to_next_worker;
+ sum0 = ip0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
+ ip4_header_t,
+ dst_address /* changed member */ );
+ ip0->checksum = ip_csum_fold (sum0);
- /* Ship frames to the worker nodes */
- for (i = 0; i < vec_len (handoff_queue_elt_by_worker_index); i++)
- {
- if (handoff_queue_elt_by_worker_index[i])
- {
- hf = handoff_queue_elt_by_worker_index[i];
- /*
- * It works better to let the handoff node
- * rate-adapt, always ship the handoff queue element.
- */
- if (1 || hf->n_vectors == hf->last_n_vectors)
+ if (PREDICT_FALSE (new_port0 != udp0->dst_port))
{
- vlib_put_frame_queue_elt (hf);
- handoff_queue_elt_by_worker_index[i] = 0;
+ if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
+ {
+ old_port0 = tcp0->dst_port;
+ tcp0->dst_port = new_port0;
+
+ sum0 = tcp0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
+ ip4_header_t,
+ dst_address /* changed member */ );
+
+ sum0 = ip_csum_update (sum0, old_port0, new_port0,
+ ip4_header_t /* cheat */ ,
+ length /* changed member */ );
+ tcp0->checksum = ip_csum_fold (sum0);
+ }
+ else
+ {
+ old_port0 = udp0->dst_port;
+ udp0->dst_port = new_port0;
+ udp0->checksum = 0;
+ }
}
else
- hf->last_n_vectors = hf->n_vectors;
- }
- congested_handoff_queue_by_worker_index[i] =
- (vlib_frame_queue_t *) (~0);
- }
- hf = 0;
- current_worker_index = ~0;
- return frame->n_vectors;
-}
-
-VLIB_REGISTER_NODE (snat_out2in_worker_handoff_node) = {
- .function = snat_out2in_worker_handoff_fn,
- .name = "nat44-out2in-worker-handoff",
- .vector_size = sizeof (u32),
- .format_trace = format_snat_out2in_worker_handoff_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
-
- .n_errors = ARRAY_LEN(snat_out2in_error_strings),
- .error_strings = snat_out2in_error_strings,
-
- .n_next_nodes = 1,
-
- .next_nodes = {
- [0] = "error-drop",
- },
-};
-
-VLIB_NODE_FUNCTION_MULTIARCH (snat_out2in_worker_handoff_node, snat_out2in_worker_handoff_fn);
-
-static uword
-snat_out2in_fast_node_fn (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- u32 n_left_from, * from, * to_next;
- snat_out2in_next_t next_index;
- u32 pkts_processed = 0;
- snat_main_t * sm = &snat_main;
-
- from = vlib_frame_vector_args (frame);
- n_left_from = frame->n_vectors;
- next_index = node->cached_next_index;
-
- while (n_left_from > 0)
- {
- u32 n_left_to_next;
-
- vlib_get_next_frame (vm, node, next_index,
- to_next, n_left_to_next);
-
- while (n_left_from > 0 && n_left_to_next > 0)
- {
- u32 bi0;
- vlib_buffer_t * b0;
- u32 next0 = SNAT_OUT2IN_NEXT_DROP;
- u32 sw_if_index0;
- ip4_header_t * ip0;
- ip_csum_t sum0;
- u32 new_addr0, old_addr0;
- u16 new_port0, old_port0;
- udp_header_t * udp0;
- tcp_header_t * tcp0;
- icmp46_header_t * icmp0;
- snat_session_key_t key0, sm0;
- u32 proto0;
- u32 rx_fib_index0;
-
- /* speculatively enqueue b0 to the current next frame */
- bi0 = from[0];
- to_next[0] = bi0;
- from += 1;
- to_next += 1;
- n_left_from -= 1;
- n_left_to_next -= 1;
+ {
+ if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
+ {
+ sum0 = tcp0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
+ ip4_header_t,
+ dst_address /* changed member */ );
- b0 = vlib_get_buffer (vm, bi0);
+ tcp0->checksum = ip_csum_fold (sum0);
+ }
+ }
- ip0 = vlib_buffer_get_current (b0);
- udp0 = ip4_next_header (ip0);
- tcp0 = (tcp_header_t *) udp0;
- icmp0 = (icmp46_header_t *) udp0;
+ trace00:
- sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
- rx_fib_index0 = ip4_fib_table_get_index_for_sw_if_index(sw_if_index0);
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ snat_out2in_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->sw_if_index = sw_if_index0;
+ t->next_index = next0;
+ }
- vnet_feature_next (&next0, b0);
+ pkts_processed += next0 != SNAT_OUT2IN_NEXT_DROP;
- if (PREDICT_FALSE(ip0->ttl == 1))
- {
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
- icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
- ICMP4_time_exceeded_ttl_exceeded_in_transit,
- 0);
- next0 = SNAT_OUT2IN_NEXT_ICMP_ERROR;
- goto trace00;
- }
-
- proto0 = ip_proto_to_snat_proto (ip0->protocol);
-
- if (PREDICT_FALSE (proto0 == ~0))
- goto trace00;
-
- if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
- {
- next0 = icmp_out2in(sm, b0, ip0, icmp0, sw_if_index0,
- rx_fib_index0, node, next0, ~0, 0, 0);
- goto trace00;
- }
-
- key0.addr = ip0->dst_address;
- key0.port = udp0->dst_port;
- key0.fib_index = rx_fib_index0;
-
- if (snat_static_mapping_match(sm, key0, &sm0, 1, 0, 0, 0, 0))
- {
- b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
- goto trace00;
- }
-
- new_addr0 = sm0.addr.as_u32;
- new_port0 = sm0.port;
- vnet_buffer(b0)->sw_if_index[VLIB_TX] = sm0.fib_index;
- old_addr0 = ip0->dst_address.as_u32;
- ip0->dst_address.as_u32 = new_addr0;
-
- sum0 = ip0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
- ip4_header_t,
- dst_address /* changed member */);
- ip0->checksum = ip_csum_fold (sum0);
-
- if (PREDICT_FALSE(new_port0 != udp0->dst_port))
- {
- if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP))
- {
- old_port0 = tcp0->dst_port;
- tcp0->dst_port = new_port0;
-
- sum0 = tcp0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
- ip4_header_t,
- dst_address /* changed member */);
-
- sum0 = ip_csum_update (sum0, old_port0, new_port0,
- ip4_header_t /* cheat */,
- length /* changed member */);
- tcp0->checksum = ip_csum_fold(sum0);
- }
- else
- {
- old_port0 = udp0->dst_port;
- udp0->dst_port = new_port0;
- udp0->checksum = 0;
- }
- }
- else
- {
- if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP))
- {
- sum0 = tcp0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
- ip4_header_t,
- dst_address /* changed member */);
-
- tcp0->checksum = ip_csum_fold(sum0);
- }
- }
-
- trace00:
-
- if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b0->flags & VLIB_BUFFER_IS_TRACED)))
- {
- snat_out2in_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->sw_if_index = sw_if_index0;
- t->next_index = next0;
- }
-
- pkts_processed += next0 != SNAT_OUT2IN_NEXT_DROP;
-
- /* verify speculative enqueue, maybe switch current next frame */
+ /* verify speculative enqueue, maybe switch current next frame */
vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
to_next, n_left_to_next,
bi0, next0);
}
vlib_node_increment_counter (vm, snat_out2in_fast_node.index,
- SNAT_OUT2IN_ERROR_OUT2IN_PACKETS,
- pkts_processed);
+ SNAT_OUT2IN_ERROR_OUT2IN_PACKETS,
+ pkts_processed);
return frame->n_vectors;
}
+/* *INDENT-OFF* */
VLIB_REGISTER_NODE (snat_out2in_fast_node) = {
.function = snat_out2in_fast_node_fn,
.name = "nat44-out2in-fast",
[SNAT_OUT2IN_NEXT_REASS] = "nat44-out2in-reass",
},
};
-VLIB_NODE_FUNCTION_MULTIARCH (snat_out2in_fast_node, snat_out2in_fast_node_fn);
+/* *INDENT-ON* */
+
+VLIB_NODE_FUNCTION_MULTIARCH (snat_out2in_fast_node,
+ snat_out2in_fast_node_fn);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
--- /dev/null
+/*
+ * Copyright (c) 2018 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/**
+ * @file
+ * @brief NAT44 endpoint-dependent outside to inside network translation
+ */
+
+#include <vlib/vlib.h>
+#include <vnet/vnet.h>
+#include <vnet/pg/pg.h>
+#include <vnet/ip/ip.h>
+#include <vnet/ethernet/ethernet.h>
+#include <vnet/fib/ip4_fib.h>
+#include <vnet/udp/udp.h>
+#include <vppinfra/error.h>
+#include <nat/nat.h>
+#include <nat/nat_ipfix_logging.h>
+#include <nat/nat_reass.h>
+#include <nat/nat_inlines.h>
+
+#define foreach_nat_out2in_ed_error \
+_(UNSUPPORTED_PROTOCOL, "Unsupported protocol") \
+_(OUT2IN_PACKETS, "Good out2in packets processed") \
+_(OUT_OF_PORTS, "Out of ports") \
+_(BAD_ICMP_TYPE, "unsupported ICMP type") \
+_(NO_TRANSLATION, "No translation") \
+_(MAX_SESSIONS_EXCEEDED, "Maximum sessions exceeded") \
+_(DROP_FRAGMENT, "Drop fragment") \
+_(MAX_REASS, "Maximum reassemblies exceeded") \
+_(MAX_FRAG, "Maximum fragments per reassembly exceeded")
+
+typedef enum
+{
+#define _(sym,str) NAT_OUT2IN_ED_ERROR_##sym,
+ foreach_nat_out2in_ed_error
+#undef _
+ NAT_OUT2IN_ED_N_ERROR,
+} nat_out2in_ed_error_t;
+
+static char *nat_out2in_ed_error_strings[] = {
+#define _(sym,string) string,
+ foreach_nat_out2in_ed_error
+#undef _
+};
+
+typedef enum
+{
+ NAT44_ED_OUT2IN_NEXT_DROP,
+ NAT44_ED_OUT2IN_NEXT_LOOKUP,
+ NAT44_ED_OUT2IN_NEXT_ICMP_ERROR,
+ NAT44_ED_OUT2IN_NEXT_IN2OUT,
+ NAT44_ED_OUT2IN_NEXT_SLOW_PATH,
+ NAT44_ED_OUT2IN_NEXT_REASS,
+ NAT44_ED_OUT2IN_N_NEXT,
+} nat44_ed_out2in_next_t;
+
+typedef struct
+{
+ u32 sw_if_index;
+ u32 next_index;
+ u32 session_index;
+ u32 is_slow_path;
+} nat44_ed_out2in_trace_t;
+
+vlib_node_registration_t nat44_ed_out2in_node;
+vlib_node_registration_t nat44_ed_out2in_slowpath_node;
+vlib_node_registration_t nat44_ed_out2in_reass_node;
+
+static u8 *
+format_nat44_ed_out2in_trace (u8 * s, va_list * args)
+{
+ CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
+ CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
+ nat44_ed_out2in_trace_t *t = va_arg (*args, nat44_ed_out2in_trace_t *);
+ char *tag;
+
+ tag =
+ t->is_slow_path ? "NAT44_OUT2IN_ED_SLOW_PATH" :
+ "NAT44_OUT2IN_ED_FAST_PATH";
+
+ s = format (s, "%s: sw_if_index %d, next index %d, session %d", tag,
+ t->sw_if_index, t->next_index, t->session_index);
+
+ return s;
+}
+
+static inline u32
+icmp_out2in_ed_slow_path (snat_main_t * sm, vlib_buffer_t * b0,
+ ip4_header_t * ip0, icmp46_header_t * icmp0,
+ u32 sw_if_index0, u32 rx_fib_index0,
+ vlib_node_runtime_t * node, u32 next0, f64 now,
+ u32 thread_index, snat_session_t ** p_s0)
+{
+ next0 = icmp_out2in (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
+ next0, thread_index, p_s0, 0);
+ snat_session_t *s0 = *p_s0;
+ if (PREDICT_TRUE (next0 != NAT44_ED_OUT2IN_NEXT_DROP && s0))
+ {
+ /* Accounting */
+ nat44_session_update_counters (s0, now,
+ vlib_buffer_length_in_chain
+ (sm->vlib_main, b0));
+ }
+ return next0;
+}
+
+int
+nat44_o2i_ed_is_idle_session_cb (clib_bihash_kv_16_8_t * kv, void *arg)
+{
+ snat_main_t *sm = &snat_main;
+ nat44_is_idle_session_ctx_t *ctx = arg;
+ snat_session_t *s;
+ u64 sess_timeout_time;
+ nat_ed_ses_key_t ed_key;
+ clib_bihash_kv_16_8_t ed_kv;
+ int i;
+ snat_address_t *a;
+ snat_session_key_t key;
+ snat_main_per_thread_data_t *tsm = vec_elt_at_index (sm->per_thread_data,
+ ctx->thread_index);
+
+ s = pool_elt_at_index (tsm->sessions, kv->value);
+ sess_timeout_time = s->last_heard + (f64) nat44_session_get_timeout (sm, s);
+ if (ctx->now >= sess_timeout_time)
+ {
+ ed_key.l_addr = s->in2out.addr;
+ ed_key.r_addr = s->ext_host_addr;
+ ed_key.fib_index = s->out2in.fib_index;
+ if (snat_is_unk_proto_session (s))
+ {
+ ed_key.proto = s->in2out.port;
+ ed_key.r_port = 0;
+ ed_key.l_port = 0;
+ }
+ else
+ {
+ ed_key.proto = snat_proto_to_ip_proto (s->in2out.protocol);
+ ed_key.l_port = s->in2out.port;
+ ed_key.r_port = s->ext_host_port;
+ }
+ if (is_twice_nat_session (s))
+ {
+ ed_key.r_addr = s->ext_host_nat_addr;
+ ed_key.r_port = s->ext_host_nat_port;
+ }
+ ed_kv.key[0] = ed_key.as_u64[0];
+ ed_kv.key[1] = ed_key.as_u64[1];
+ if (clib_bihash_add_del_16_8 (&tsm->in2out_ed, &ed_kv, 0))
+ nat_log_warn ("in2out_ed key del failed");
+
+ if (snat_is_unk_proto_session (s))
+ goto delete;
+
+ snat_ipfix_logging_nat44_ses_delete (s->in2out.addr.as_u32,
+ s->out2in.addr.as_u32,
+ s->in2out.protocol,
+ s->in2out.port,
+ s->out2in.port,
+ s->in2out.fib_index);
+
+ if (is_twice_nat_session (s))
+ {
+ for (i = 0; i < vec_len (sm->twice_nat_addresses); i++)
+ {
+ key.protocol = s->in2out.protocol;
+ key.port = s->ext_host_nat_port;
+ a = sm->twice_nat_addresses + i;
+ if (a->addr.as_u32 == s->ext_host_nat_addr.as_u32)
+ {
+ snat_free_outside_address_and_port (sm->twice_nat_addresses,
+ ctx->thread_index,
+ &key);
+ break;
+ }
+ }
+ }
+
+ if (snat_is_session_static (s))
+ goto delete;
+
+ snat_free_outside_address_and_port (sm->addresses, ctx->thread_index,
+ &s->out2in);
+ delete:
+ nat44_delete_session (sm, s, ctx->thread_index);
+ return 1;
+ }
+
+ return 0;
+}
+
+static snat_session_t *
+create_session_for_static_mapping_ed (snat_main_t * sm,
+ vlib_buffer_t * b,
+ snat_session_key_t l_key,
+ snat_session_key_t e_key,
+ vlib_node_runtime_t * node,
+ u32 thread_index,
+ twice_nat_type_t twice_nat,
+ lb_nat_type_t lb_nat, f64 now)
+{
+ snat_session_t *s;
+ snat_user_t *u;
+ ip4_header_t *ip;
+ udp_header_t *udp;
+ snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
+ clib_bihash_kv_16_8_t kv;
+ snat_session_key_t eh_key;
+ nat44_is_idle_session_ctx_t ctx;
+
+ if (PREDICT_FALSE (maximum_sessions_exceeded (sm, thread_index)))
+ {
+ b->error = node->errors[NAT_OUT2IN_ED_ERROR_MAX_SESSIONS_EXCEEDED];
+ nat_log_notice ("maximum sessions exceeded");
+ return 0;
+ }
+
+ u = nat_user_get_or_create (sm, &l_key.addr, l_key.fib_index, thread_index);
+ if (!u)
+ {
+ nat_log_warn ("create NAT user failed");
+ return 0;
+ }
+
+ s = nat_ed_session_alloc (sm, u, thread_index);
+ if (!s)
+ {
+ nat44_delete_user_with_no_session (sm, u, thread_index);
+ nat_log_warn ("create NAT session failed");
+ return 0;
+ }
+
+ ip = vlib_buffer_get_current (b);
+ udp = ip4_next_header (ip);
+
+ s->ext_host_addr.as_u32 = ip->src_address.as_u32;
+ s->ext_host_port = e_key.protocol == SNAT_PROTOCOL_ICMP ? 0 : udp->src_port;
+ s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING;
+ if (lb_nat)
+ s->flags |= SNAT_SESSION_FLAG_LOAD_BALANCING;
+ if (lb_nat == AFFINITY_LB_NAT)
+ s->flags |= SNAT_SESSION_FLAG_AFFINITY;
+ s->flags |= SNAT_SESSION_FLAG_ENDPOINT_DEPENDENT;
+ s->out2in = e_key;
+ s->in2out = l_key;
+ s->in2out.protocol = s->out2in.protocol;
+ user_session_increment (sm, u, 1);
+
+ /* Add to lookup tables */
+ make_ed_kv (&kv, &e_key.addr, &s->ext_host_addr, ip->protocol,
+ e_key.fib_index, e_key.port, s->ext_host_port);
+ kv.value = s - tsm->sessions;
+ ctx.now = now;
+ ctx.thread_index = thread_index;
+ if (clib_bihash_add_or_overwrite_stale_16_8 (&tsm->out2in_ed, &kv,
+ nat44_o2i_ed_is_idle_session_cb,
+ &ctx))
+ nat_log_notice ("out2in-ed key add failed");
+
+ if (twice_nat == TWICE_NAT || (twice_nat == TWICE_NAT_SELF &&
+ ip->src_address.as_u32 == l_key.addr.as_u32))
+ {
+ eh_key.protocol = e_key.protocol;
+ if (snat_alloc_outside_address_and_port (sm->twice_nat_addresses, 0,
+ thread_index, &eh_key,
+ sm->port_per_thread,
+ tsm->snat_thread_index))
+ {
+ b->error = node->errors[NAT_OUT2IN_ED_ERROR_OUT_OF_PORTS];
+ nat44_delete_session (sm, s, thread_index);
+ if (clib_bihash_add_del_16_8 (&tsm->out2in_ed, &kv, 0))
+ nat_log_notice ("out2in-ed key del failed");
+ return 0;
+ }
+ s->ext_host_nat_addr.as_u32 = eh_key.addr.as_u32;
+ s->ext_host_nat_port = eh_key.port;
+ s->flags |= SNAT_SESSION_FLAG_TWICE_NAT;
+ make_ed_kv (&kv, &l_key.addr, &s->ext_host_nat_addr, ip->protocol,
+ l_key.fib_index, l_key.port, s->ext_host_nat_port);
+ }
+ else
+ {
+ make_ed_kv (&kv, &l_key.addr, &s->ext_host_addr, ip->protocol,
+ l_key.fib_index, l_key.port, s->ext_host_port);
+ }
+ kv.value = s - tsm->sessions;
+ if (clib_bihash_add_or_overwrite_stale_16_8 (&tsm->in2out_ed, &kv,
+ nat44_i2o_ed_is_idle_session_cb,
+ &ctx))
+ nat_log_notice ("in2out-ed key add failed");
+
+ return s;
+}
+
+static_always_inline int
+icmp_get_ed_key (ip4_header_t * ip0, nat_ed_ses_key_t * p_key0)
+{
+ icmp46_header_t *icmp0;
+ nat_ed_ses_key_t key0;
+ icmp_echo_header_t *echo0, *inner_echo0 = 0;
+ ip4_header_t *inner_ip0;
+ void *l4_header = 0;
+ icmp46_header_t *inner_icmp0;
+
+ icmp0 = (icmp46_header_t *) ip4_next_header (ip0);
+ echo0 = (icmp_echo_header_t *) (icmp0 + 1);
+
+ if (!icmp_is_error_message (icmp0))
+ {
+ key0.proto = IP_PROTOCOL_ICMP;
+ key0.l_addr = ip0->dst_address;
+ key0.r_addr = ip0->src_address;
+ key0.l_port = echo0->identifier;
+ key0.r_port = 0;
+ }
+ else
+ {
+ inner_ip0 = (ip4_header_t *) (echo0 + 1);
+ l4_header = ip4_next_header (inner_ip0);
+ key0.proto = inner_ip0->protocol;
+ key0.l_addr = inner_ip0->src_address;
+ key0.r_addr = inner_ip0->dst_address;
+ switch (ip_proto_to_snat_proto (inner_ip0->protocol))
+ {
+ case SNAT_PROTOCOL_ICMP:
+ inner_icmp0 = (icmp46_header_t *) l4_header;
+ inner_echo0 = (icmp_echo_header_t *) (inner_icmp0 + 1);
+ key0.l_port = inner_echo0->identifier;
+ key0.r_port = 0;
+ break;
+ case SNAT_PROTOCOL_UDP:
+ case SNAT_PROTOCOL_TCP:
+ key0.l_port = ((tcp_udp_header_t *) l4_header)->src_port;
+ key0.r_port = ((tcp_udp_header_t *) l4_header)->dst_port;
+ break;
+ default:
+ return -1;
+ }
+ }
+ *p_key0 = key0;
+ return 0;
+}
+
+static int
+next_src_nat (snat_main_t * sm, ip4_header_t * ip, u8 proto, u16 src_port,
+ u16 dst_port, u32 thread_index, u32 rx_fib_index)
+{
+ clib_bihash_kv_16_8_t kv, value;
+ snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
+
+ make_ed_kv (&kv, &ip->src_address, &ip->dst_address, proto,
+ rx_fib_index, src_port, dst_port);
+ if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &kv, &value))
+ return 1;
+
+ return 0;
+}
+
+static void
+create_bypass_for_fwd (snat_main_t * sm, ip4_header_t * ip, u32 rx_fib_index,
+ u32 thread_index)
+{
+ nat_ed_ses_key_t key;
+ clib_bihash_kv_16_8_t kv, value;
+ udp_header_t *udp;
+ snat_user_t *u;
+ snat_session_t *s = 0;
+ snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
+ f64 now = vlib_time_now (sm->vlib_main);
+
+ if (ip->protocol == IP_PROTOCOL_ICMP)
+ {
+ if (icmp_get_ed_key (ip, &key))
+ return;
+ }
+ else if (ip->protocol == IP_PROTOCOL_UDP || ip->protocol == IP_PROTOCOL_TCP)
+ {
+ udp = ip4_next_header (ip);
+ key.r_addr = ip->src_address;
+ key.l_addr = ip->dst_address;
+ key.proto = ip->protocol;
+ key.l_port = udp->dst_port;
+ key.r_port = udp->src_port;
+ }
+ else
+ {
+ key.r_addr = ip->src_address;
+ key.l_addr = ip->dst_address;
+ key.proto = ip->protocol;
+ key.l_port = key.r_port = 0;
+ }
+ key.fib_index = 0;
+ kv.key[0] = key.as_u64[0];
+ kv.key[1] = key.as_u64[1];
+
+ if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &kv, &value))
+ {
+ s = pool_elt_at_index (tsm->sessions, value.value);
+ }
+ else
+ {
+ if (PREDICT_FALSE (maximum_sessions_exceeded (sm, thread_index)))
+ return;
+
+ u = nat_user_get_or_create (sm, &ip->dst_address, sm->inside_fib_index,
+ thread_index);
+ if (!u)
+ {
+ nat_log_warn ("create NAT user failed");
+ return;
+ }
+
+ s = nat_ed_session_alloc (sm, u, thread_index);
+ if (!s)
+ {
+ nat44_delete_user_with_no_session (sm, u, thread_index);
+ nat_log_warn ("create NAT session failed");
+ return;
+ }
+
+ s->ext_host_addr = key.r_addr;
+ s->ext_host_port = key.r_port;
+ s->flags |= SNAT_SESSION_FLAG_FWD_BYPASS;
+ s->out2in.addr = key.l_addr;
+ s->out2in.port = key.l_port;
+ s->out2in.protocol = ip_proto_to_snat_proto (key.proto);
+ s->out2in.fib_index = 0;
+ s->in2out = s->out2in;
+ user_session_increment (sm, u, 0);
+
+ kv.value = s - tsm->sessions;
+ if (clib_bihash_add_del_16_8 (&tsm->in2out_ed, &kv, 1))
+ nat_log_notice ("in2out_ed key add failed");
+ }
+
+ if (ip->protocol == IP_PROTOCOL_TCP)
+ {
+ tcp_header_t *tcp = ip4_next_header (ip);
+ if (nat44_set_tcp_session_state_o2i (sm, s, tcp, thread_index))
+ return;
+ }
+
+ /* Accounting */
+ nat44_session_update_counters (s, now, 0);
+}
+
+u32
+icmp_match_out2in_ed (snat_main_t * sm, vlib_node_runtime_t * node,
+ u32 thread_index, vlib_buffer_t * b, ip4_header_t * ip,
+ u8 * p_proto, snat_session_key_t * p_value,
+ u8 * p_dont_translate, void *d, void *e)
+{
+ u32 next = ~0, sw_if_index, rx_fib_index;
+ icmp46_header_t *icmp;
+ nat_ed_ses_key_t key;
+ clib_bihash_kv_16_8_t kv, value;
+ snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
+ snat_session_t *s = 0;
+ u8 dont_translate = 0, is_addr_only;
+ snat_session_key_t e_key, l_key;
+
+ icmp = (icmp46_header_t *) ip4_next_header (ip);
+ sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_RX];
+ rx_fib_index = ip4_fib_table_get_index_for_sw_if_index (sw_if_index);
+
+ if (icmp_get_ed_key (ip, &key))
+ {
+ b->error = node->errors[NAT_OUT2IN_ED_ERROR_UNSUPPORTED_PROTOCOL];
+ next = NAT44_ED_OUT2IN_NEXT_DROP;
+ goto out;
+ }
+ key.fib_index = rx_fib_index;
+ kv.key[0] = key.as_u64[0];
+ kv.key[1] = key.as_u64[1];
+
+ if (clib_bihash_search_16_8 (&tsm->out2in_ed, &kv, &value))
+ {
+ /* Try to match static mapping */
+ e_key.addr = ip->dst_address;
+ e_key.port = key.l_port;
+ e_key.protocol = ip_proto_to_snat_proto (key.proto);
+ e_key.fib_index = rx_fib_index;
+ if (snat_static_mapping_match
+ (sm, e_key, &l_key, 1, &is_addr_only, 0, 0, 0))
+ {
+ if (!sm->forwarding_enabled)
+ {
+ /* Don't NAT packet aimed at the intfc address */
+ if (PREDICT_FALSE (is_interface_addr (sm, node, sw_if_index,
+ ip->dst_address.as_u32)))
+ {
+ dont_translate = 1;
+ goto out;
+ }
+ b->error = node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION];
+ next = NAT44_ED_OUT2IN_NEXT_DROP;
+ goto out;
+ }
+ else
+ {
+ dont_translate = 1;
+ if (next_src_nat (sm, ip, key.proto, key.l_port, key.r_port,
+ thread_index, rx_fib_index))
+ {
+ next = NAT44_ED_OUT2IN_NEXT_IN2OUT;
+ goto out;
+ }
+ create_bypass_for_fwd (sm, ip, rx_fib_index, thread_index);
+ goto out;
+ }
+ }
+
+ if (PREDICT_FALSE (icmp->type != ICMP4_echo_reply &&
+ (icmp->type != ICMP4_echo_request || !is_addr_only)))
+ {
+ b->error = node->errors[NAT_OUT2IN_ED_ERROR_BAD_ICMP_TYPE];
+ next = NAT44_ED_OUT2IN_NEXT_DROP;
+ goto out;
+ }
+
+ /* Create session initiated by host from external network */
+ s = create_session_for_static_mapping_ed (sm, b, l_key, e_key, node,
+ thread_index, 0, 0,
+ vlib_time_now
+ (sm->vlib_main));
+
+ if (!s)
+ {
+ next = NAT44_ED_OUT2IN_NEXT_DROP;
+ goto out;
+ }
+ }
+ else
+ {
+ if (PREDICT_FALSE (icmp->type != ICMP4_echo_reply &&
+ icmp->type != ICMP4_echo_request &&
+ !icmp_is_error_message (icmp)))
+ {
+ b->error = node->errors[NAT_OUT2IN_ED_ERROR_BAD_ICMP_TYPE];
+ next = NAT44_ED_OUT2IN_NEXT_DROP;
+ goto out;
+ }
+
+ s = pool_elt_at_index (tsm->sessions, value.value);
+ }
+
+ *p_proto = ip_proto_to_snat_proto (key.proto);
+out:
+ if (s)
+ *p_value = s->in2out;
+ *p_dont_translate = dont_translate;
+ if (d)
+ *(snat_session_t **) d = s;
+ return next;
+}
+
+static snat_session_t *
+nat44_ed_out2in_unknown_proto (snat_main_t * sm,
+ vlib_buffer_t * b,
+ ip4_header_t * ip,
+ u32 rx_fib_index,
+ u32 thread_index,
+ f64 now,
+ vlib_main_t * vm, vlib_node_runtime_t * node)
+{
+ clib_bihash_kv_8_8_t kv, value;
+ clib_bihash_kv_16_8_t s_kv, s_value;
+ snat_static_mapping_t *m;
+ u32 old_addr, new_addr;
+ ip_csum_t sum;
+ snat_session_t *s;
+ snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
+ snat_user_t *u;
+
+ old_addr = ip->dst_address.as_u32;
+
+ make_ed_kv (&s_kv, &ip->dst_address, &ip->src_address, ip->protocol,
+ rx_fib_index, 0, 0);
+
+ if (!clib_bihash_search_16_8 (&tsm->out2in_ed, &s_kv, &s_value))
+ {
+ s = pool_elt_at_index (tsm->sessions, s_value.value);
+ new_addr = ip->dst_address.as_u32 = s->in2out.addr.as_u32;
+ }
+ else
+ {
+ if (PREDICT_FALSE (maximum_sessions_exceeded (sm, thread_index)))
+ {
+ b->error = node->errors[NAT_OUT2IN_ED_ERROR_MAX_SESSIONS_EXCEEDED];
+ nat_log_notice ("maximum sessions exceeded");
+ return 0;
+ }
+
+ make_sm_kv (&kv, &ip->dst_address, 0, 0, 0);
+ if (clib_bihash_search_8_8
+ (&sm->static_mapping_by_external, &kv, &value))
+ {
+ b->error = node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION];
+ return 0;
+ }
+
+ m = pool_elt_at_index (sm->static_mappings, value.value);
+
+ new_addr = ip->dst_address.as_u32 = m->local_addr.as_u32;
+
+ u = nat_user_get_or_create (sm, &m->local_addr, m->fib_index,
+ thread_index);
+ if (!u)
+ {
+ nat_log_warn ("create NAT user failed");
+ return 0;
+ }
+
+ /* Create a new session */
+ s = nat_ed_session_alloc (sm, u, thread_index);
+ if (!s)
+ {
+ nat44_delete_user_with_no_session (sm, u, thread_index);
+ nat_log_warn ("create NAT session failed");
+ return 0;
+ }
+
+ s->ext_host_addr.as_u32 = ip->src_address.as_u32;
+ s->flags |= SNAT_SESSION_FLAG_UNKNOWN_PROTO;
+ s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING;
+ s->flags |= SNAT_SESSION_FLAG_ENDPOINT_DEPENDENT;
+ s->out2in.addr.as_u32 = old_addr;
+ s->out2in.fib_index = rx_fib_index;
+ s->in2out.addr.as_u32 = new_addr;
+ s->in2out.fib_index = m->fib_index;
+ s->in2out.port = s->out2in.port = ip->protocol;
+ user_session_increment (sm, u, 1);
+
+ /* Add to lookup tables */
+ s_kv.value = s - tsm->sessions;
+ if (clib_bihash_add_del_16_8 (&tsm->out2in_ed, &s_kv, 1))
+ nat_log_notice ("out2in key add failed");
+
+ make_ed_kv (&s_kv, &ip->dst_address, &ip->src_address, ip->protocol,
+ m->fib_index, 0, 0);
+ s_kv.value = s - tsm->sessions;
+ if (clib_bihash_add_del_16_8 (&tsm->in2out_ed, &s_kv, 1))
+ nat_log_notice ("in2out key add failed");
+ }
+
+ /* Update IP checksum */
+ sum = ip->checksum;
+ sum = ip_csum_update (sum, old_addr, new_addr, ip4_header_t, dst_address);
+ ip->checksum = ip_csum_fold (sum);
+
+ vnet_buffer (b)->sw_if_index[VLIB_TX] = s->in2out.fib_index;
+
+ /* Accounting */
+ nat44_session_update_counters (s, now, vlib_buffer_length_in_chain (vm, b));
+
+ return s;
+}
+
+static inline uword
+nat44_ed_out2in_node_fn_inline (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame, int is_slow_path)
+{
+ u32 n_left_from, *from, *to_next, pkts_processed = 0, stats_node_index;
+ nat44_ed_out2in_next_t next_index;
+ snat_main_t *sm = &snat_main;
+ f64 now = vlib_time_now (vm);
+ u32 thread_index = vm->thread_index;
+ snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
+
+ stats_node_index = is_slow_path ? nat44_ed_out2in_slowpath_node.index :
+ nat44_ed_out2in_node.index;
+
+ from = vlib_frame_vector_args (frame);
+ n_left_from = frame->n_vectors;
+ next_index = node->cached_next_index;
+
+ while (n_left_from > 0)
+ {
+ u32 n_left_to_next;
+
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+ while (n_left_from >= 4 && n_left_to_next >= 2)
+ {
+ u32 bi0, bi1;
+ vlib_buffer_t *b0, *b1;
+ u32 next0, sw_if_index0, rx_fib_index0, proto0, old_addr0,
+ new_addr0;
+ u32 next1, sw_if_index1, rx_fib_index1, proto1, old_addr1,
+ new_addr1;
+ u16 old_port0, new_port0, old_port1, new_port1;
+ ip4_header_t *ip0, *ip1;
+ udp_header_t *udp0, *udp1;
+ tcp_header_t *tcp0, *tcp1;
+ icmp46_header_t *icmp0, *icmp1;
+ snat_session_t *s0 = 0, *s1 = 0;
+ clib_bihash_kv_16_8_t kv0, value0, kv1, value1;
+ ip_csum_t sum0, sum1;
+ snat_session_key_t e_key0, l_key0, e_key1, l_key1;
+ lb_nat_type_t lb_nat0, lb_nat1;
+ twice_nat_type_t twice_nat0, twice_nat1;
+
+ /* Prefetch next iteration. */
+ {
+ vlib_buffer_t *p2, *p3;
+
+ p2 = vlib_get_buffer (vm, from[2]);
+ p3 = vlib_get_buffer (vm, from[3]);
+
+ vlib_prefetch_buffer_header (p2, LOAD);
+ vlib_prefetch_buffer_header (p3, LOAD);
+
+ CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, STORE);
+ CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, STORE);
+ }
+
+ /* speculatively enqueue b0 and b1 to the current next frame */
+ to_next[0] = bi0 = from[0];
+ to_next[1] = bi1 = from[1];
+ from += 2;
+ to_next += 2;
+ n_left_from -= 2;
+ n_left_to_next -= 2;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ b1 = vlib_get_buffer (vm, bi1);
+
+ next0 = NAT44_ED_OUT2IN_NEXT_LOOKUP;
+ vnet_buffer (b0)->snat.flags = 0;
+ ip0 = vlib_buffer_get_current (b0);
+
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+ rx_fib_index0 =
+ fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
+ sw_if_index0);
+
+ if (PREDICT_FALSE (ip0->ttl == 1))
+ {
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
+ icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
+ ICMP4_time_exceeded_ttl_exceeded_in_transit,
+ 0);
+ next0 = NAT44_ED_OUT2IN_NEXT_ICMP_ERROR;
+ goto trace00;
+ }
+
+ udp0 = ip4_next_header (ip0);
+ tcp0 = (tcp_header_t *) udp0;
+ icmp0 = (icmp46_header_t *) udp0;
+ proto0 = ip_proto_to_snat_proto (ip0->protocol);
+
+ if (is_slow_path)
+ {
+ if (PREDICT_FALSE (proto0 == ~0))
+ {
+ s0 =
+ nat44_ed_out2in_unknown_proto (sm, b0, ip0, rx_fib_index0,
+ thread_index, now, vm,
+ node);
+ if (!sm->forwarding_enabled)
+ {
+ if (!s0)
+ next0 = NAT44_ED_OUT2IN_NEXT_DROP;
+ goto trace00;
+ }
+ }
+
+ if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
+ {
+ next0 = icmp_out2in_ed_slow_path
+ (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
+ next0, now, thread_index, &s0);
+ goto trace00;
+ }
+ }
+ else
+ {
+ if (PREDICT_FALSE (proto0 == ~0))
+ {
+ next0 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH;
+ goto trace00;
+ }
+
+ if (ip4_is_fragment (ip0))
+ {
+ next0 = NAT44_ED_OUT2IN_NEXT_REASS;
+ goto trace00;
+ }
+
+ if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
+ {
+ next0 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH;
+ goto trace00;
+ }
+ }
+
+ make_ed_kv (&kv0, &ip0->dst_address, &ip0->src_address,
+ ip0->protocol, rx_fib_index0, udp0->dst_port,
+ udp0->src_port);
+
+ if (clib_bihash_search_16_8 (&tsm->out2in_ed, &kv0, &value0))
+ {
+ if (is_slow_path)
+ {
+ /* Try to match static mapping by external address and port,
+ destination address and port in packet */
+ e_key0.addr = ip0->dst_address;
+ e_key0.port = udp0->dst_port;
+ e_key0.protocol = proto0;
+ e_key0.fib_index = rx_fib_index0;
+ if (snat_static_mapping_match (sm, e_key0, &l_key0, 1, 0,
+ &twice_nat0, &lb_nat0,
+ &ip0->src_address))
+ {
+ /*
+ * Send DHCP packets to the ipv4 stack, or we won't
+ * be able to use dhcp client on the outside interface
+ */
+ if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_UDP
+ && (udp0->dst_port ==
+ clib_host_to_net_u16
+ (UDP_DST_PORT_dhcp_to_client))))
+ {
+ vnet_feature_next (&next0, b0);
+ goto trace00;
+ }
+
+ if (!sm->forwarding_enabled)
+ {
+ b0->error =
+ node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION];
+ next0 = NAT44_ED_OUT2IN_NEXT_DROP;
+ }
+ else
+ {
+ if (next_src_nat (sm, ip0, ip0->protocol,
+ udp0->src_port, udp0->dst_port,
+ thread_index, rx_fib_index0))
+ {
+ next0 = NAT44_ED_OUT2IN_NEXT_IN2OUT;
+ goto trace00;
+ }
+ create_bypass_for_fwd (sm, ip0, rx_fib_index0,
+ thread_index);
+ }
+ goto trace00;
+ }
+
+ /* Create session initiated by host from external network */
+ s0 = create_session_for_static_mapping_ed (sm, b0, l_key0,
+ e_key0, node,
+ thread_index,
+ twice_nat0,
+ lb_nat0, now);
+
+ if (!s0)
+ {
+ next0 = NAT44_ED_OUT2IN_NEXT_DROP;
+ goto trace00;
+ }
+ }
+ else
+ {
+ next0 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH;
+ goto trace00;
+ }
+ }
+ else
+ {
+ s0 = pool_elt_at_index (tsm->sessions, value0.value);
+ }
+
+ old_addr0 = ip0->dst_address.as_u32;
+ new_addr0 = ip0->dst_address.as_u32 = s0->in2out.addr.as_u32;
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index;
+
+ sum0 = ip0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
+ dst_address);
+ if (PREDICT_FALSE (is_twice_nat_session (s0)))
+ sum0 = ip_csum_update (sum0, ip0->src_address.as_u32,
+ s0->ext_host_nat_addr.as_u32, ip4_header_t,
+ src_address);
+ ip0->checksum = ip_csum_fold (sum0);
+
+ if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
+ {
+ old_port0 = tcp0->dst_port;
+ new_port0 = tcp0->dst_port = s0->in2out.port;
+
+ sum0 = tcp0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
+ dst_address);
+ sum0 = ip_csum_update (sum0, old_port0, new_port0, ip4_header_t,
+ length);
+ if (is_twice_nat_session (s0))
+ {
+ sum0 = ip_csum_update (sum0, ip0->src_address.as_u32,
+ s0->ext_host_nat_addr.as_u32,
+ ip4_header_t, dst_address);
+ sum0 = ip_csum_update (sum0, tcp0->src_port,
+ s0->ext_host_nat_port, ip4_header_t,
+ length);
+ tcp0->src_port = s0->ext_host_nat_port;
+ ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32;
+ }
+ tcp0->checksum = ip_csum_fold (sum0);
+ if (nat44_set_tcp_session_state_o2i
+ (sm, s0, tcp0, thread_index))
+ goto trace00;
+ }
+ else
+ {
+ udp0->dst_port = s0->in2out.port;
+ if (is_twice_nat_session (s0))
+ {
+ udp0->src_port = s0->ext_host_nat_port;
+ ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32;
+ }
+ udp0->checksum = 0;
+ }
+
+ /* Accounting */
+ nat44_session_update_counters (s0, now,
+ vlib_buffer_length_in_chain (vm,
+ b0));
+
+ trace00:
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ nat44_ed_out2in_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->is_slow_path = is_slow_path;
+ t->sw_if_index = sw_if_index0;
+ t->next_index = next0;
+ t->session_index = ~0;
+ if (s0)
+ t->session_index = s0 - tsm->sessions;
+ }
+
+ pkts_processed += next0 != NAT44_ED_OUT2IN_NEXT_DROP;
+
+ next1 = NAT44_ED_OUT2IN_NEXT_LOOKUP;
+ vnet_buffer (b1)->snat.flags = 0;
+ ip1 = vlib_buffer_get_current (b1);
+
+ sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX];
+ rx_fib_index1 =
+ fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
+ sw_if_index1);
+
+ if (PREDICT_FALSE (ip1->ttl == 1))
+ {
+ vnet_buffer (b1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
+ icmp4_error_set_vnet_buffer (b1, ICMP4_time_exceeded,
+ ICMP4_time_exceeded_ttl_exceeded_in_transit,
+ 0);
+ next1 = NAT44_ED_OUT2IN_NEXT_ICMP_ERROR;
+ goto trace01;
+ }
+
+ udp1 = ip4_next_header (ip1);
+ tcp1 = (tcp_header_t *) udp1;
+ icmp1 = (icmp46_header_t *) udp1;
+ proto1 = ip_proto_to_snat_proto (ip1->protocol);
+
+ if (is_slow_path)
+ {
+ if (PREDICT_FALSE (proto1 == ~0))
+ {
+ s1 =
+ nat44_ed_out2in_unknown_proto (sm, b1, ip1, rx_fib_index1,
+ thread_index, now, vm,
+ node);
+ if (!sm->forwarding_enabled)
+ {
+ if (!s1)
+ next1 = NAT44_ED_OUT2IN_NEXT_DROP;
+ goto trace01;
+ }
+ }
+
+ if (PREDICT_FALSE (proto1 == SNAT_PROTOCOL_ICMP))
+ {
+ next1 = icmp_out2in_ed_slow_path
+ (sm, b1, ip1, icmp1, sw_if_index1, rx_fib_index1, node,
+ next1, now, thread_index, &s1);
+ goto trace01;
+ }
+ }
+ else
+ {
+ if (PREDICT_FALSE (proto1 == ~0))
+ {
+ next1 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH;
+ goto trace01;
+ }
+
+ if (ip4_is_fragment (ip1))
+ {
+ next1 = NAT44_ED_OUT2IN_NEXT_REASS;
+ goto trace01;
+ }
+
+ if (PREDICT_FALSE (proto1 == SNAT_PROTOCOL_ICMP))
+ {
+ next1 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH;
+ goto trace01;
+ }
+ }
+
+ make_ed_kv (&kv1, &ip1->dst_address, &ip1->src_address,
+ ip1->protocol, rx_fib_index1, udp1->dst_port,
+ udp1->src_port);
+
+ if (clib_bihash_search_16_8 (&tsm->out2in_ed, &kv1, &value1))
+ {
+ if (is_slow_path)
+ {
+ /* Try to match static mapping by external address and port,
+ destination address and port in packet */
+ e_key1.addr = ip1->dst_address;
+ e_key1.port = udp1->dst_port;
+ e_key1.protocol = proto1;
+ e_key1.fib_index = rx_fib_index1;
+ if (snat_static_mapping_match (sm, e_key1, &l_key1, 1, 0,
+ &twice_nat1, &lb_nat1,
+ &ip1->src_address))
+ {
+ /*
+ * Send DHCP packets to the ipv4 stack, or we won't
+ * be able to use dhcp client on the outside interface
+ */
+ if (PREDICT_FALSE (proto1 == SNAT_PROTOCOL_UDP
+ && (udp1->dst_port ==
+ clib_host_to_net_u16
+ (UDP_DST_PORT_dhcp_to_client))))
+ {
+ vnet_feature_next (&next1, b1);
+ goto trace01;
+ }
+
+ if (!sm->forwarding_enabled)
+ {
+ b1->error =
+ node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION];
+ next1 = NAT44_ED_OUT2IN_NEXT_DROP;
+ }
+ else
+ {
+ if (next_src_nat (sm, ip1, ip1->protocol,
+ udp1->src_port, udp1->dst_port,
+ thread_index, rx_fib_index1))
+ {
+ next1 = NAT44_ED_OUT2IN_NEXT_IN2OUT;
+ goto trace01;
+ }
+ create_bypass_for_fwd (sm, ip1, rx_fib_index1,
+ thread_index);
+ }
+ goto trace01;
+ }
+
+ /* Create session initiated by host from external network */
+ s1 = create_session_for_static_mapping_ed (sm, b1, l_key1,
+ e_key1, node,
+ thread_index,
+ twice_nat1,
+ lb_nat1, now);
+
+ if (!s1)
+ {
+ next1 = NAT44_ED_OUT2IN_NEXT_DROP;
+ goto trace01;
+ }
+ }
+ else
+ {
+ next1 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH;
+ goto trace01;
+ }
+ }
+ else
+ {
+ s1 = pool_elt_at_index (tsm->sessions, value1.value);
+ }
+
+ old_addr1 = ip1->dst_address.as_u32;
+ new_addr1 = ip1->dst_address.as_u32 = s1->in2out.addr.as_u32;
+ vnet_buffer (b1)->sw_if_index[VLIB_TX] = s1->in2out.fib_index;
+
+ sum1 = ip1->checksum;
+ sum1 = ip_csum_update (sum1, old_addr1, new_addr1, ip4_header_t,
+ dst_address);
+ if (PREDICT_FALSE (is_twice_nat_session (s1)))
+ sum1 = ip_csum_update (sum1, ip1->src_address.as_u32,
+ s1->ext_host_nat_addr.as_u32, ip4_header_t,
+ src_address);
+ ip1->checksum = ip_csum_fold (sum1);
+
+ if (PREDICT_TRUE (proto1 == SNAT_PROTOCOL_TCP))
+ {
+ old_port1 = tcp1->dst_port;
+ new_port1 = tcp1->dst_port = s1->in2out.port;
+
+ sum1 = tcp1->checksum;
+ sum1 = ip_csum_update (sum1, old_addr1, new_addr1, ip4_header_t,
+ dst_address);
+ sum1 = ip_csum_update (sum1, old_port1, new_port1, ip4_header_t,
+ length);
+ if (is_twice_nat_session (s1))
+ {
+ sum1 = ip_csum_update (sum1, ip1->src_address.as_u32,
+ s1->ext_host_nat_addr.as_u32,
+ ip4_header_t, dst_address);
+ sum1 = ip_csum_update (sum1, tcp1->src_port,
+ s1->ext_host_nat_port, ip4_header_t,
+ length);
+ tcp1->src_port = s1->ext_host_nat_port;
+ ip1->src_address.as_u32 = s1->ext_host_nat_addr.as_u32;
+ }
+ tcp1->checksum = ip_csum_fold (sum1);
+ if (nat44_set_tcp_session_state_o2i
+ (sm, s1, tcp1, thread_index))
+ goto trace01;
+ }
+ else
+ {
+ udp1->dst_port = s1->in2out.port;
+ if (is_twice_nat_session (s1))
+ {
+ udp1->src_port = s1->ext_host_nat_port;
+ ip1->src_address.as_u32 = s1->ext_host_nat_addr.as_u32;
+ }
+ udp1->checksum = 0;
+ }
+
+ /* Accounting */
+ nat44_session_update_counters (s1, now,
+ vlib_buffer_length_in_chain (vm,
+ b1));
+
+ trace01:
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b1->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ nat44_ed_out2in_trace_t *t =
+ vlib_add_trace (vm, node, b1, sizeof (*t));
+ t->is_slow_path = is_slow_path;
+ t->sw_if_index = sw_if_index1;
+ t->next_index = next1;
+ t->session_index = ~0;
+ if (s1)
+ t->session_index = s1 - tsm->sessions;
+ }
+
+ pkts_processed += next1 != NAT44_ED_OUT2IN_NEXT_DROP;
+
+ /* verify speculative enqueues, maybe switch current next frame */
+ vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
+ to_next, n_left_to_next,
+ bi0, bi1, next0, next1);
+ }
+
+ while (n_left_from > 0 && n_left_to_next > 0)
+ {
+ u32 bi0;
+ vlib_buffer_t *b0;
+ u32 next0, sw_if_index0, rx_fib_index0, proto0, old_addr0,
+ new_addr0;
+ u16 old_port0, new_port0;
+ ip4_header_t *ip0;
+ udp_header_t *udp0;
+ tcp_header_t *tcp0;
+ icmp46_header_t *icmp0;
+ snat_session_t *s0 = 0;
+ clib_bihash_kv_16_8_t kv0, value0;
+ ip_csum_t sum0;
+ snat_session_key_t e_key0, l_key0;
+ lb_nat_type_t lb_nat0;
+ twice_nat_type_t twice_nat0;
+
+ /* speculatively enqueue b0 to the current next frame */
+ bi0 = from[0];
+ to_next[0] = bi0;
+ from += 1;
+ to_next += 1;
+ n_left_from -= 1;
+ n_left_to_next -= 1;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ next0 = NAT44_ED_OUT2IN_NEXT_LOOKUP;
+ vnet_buffer (b0)->snat.flags = 0;
+ ip0 = vlib_buffer_get_current (b0);
+
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+ rx_fib_index0 =
+ fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
+ sw_if_index0);
+
+ if (PREDICT_FALSE (ip0->ttl == 1))
+ {
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
+ icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
+ ICMP4_time_exceeded_ttl_exceeded_in_transit,
+ 0);
+ next0 = NAT44_ED_OUT2IN_NEXT_ICMP_ERROR;
+ goto trace0;
+ }
+
+ udp0 = ip4_next_header (ip0);
+ tcp0 = (tcp_header_t *) udp0;
+ icmp0 = (icmp46_header_t *) udp0;
+ proto0 = ip_proto_to_snat_proto (ip0->protocol);
+
+ if (is_slow_path)
+ {
+ if (PREDICT_FALSE (proto0 == ~0))
+ {
+ s0 =
+ nat44_ed_out2in_unknown_proto (sm, b0, ip0, rx_fib_index0,
+ thread_index, now, vm,
+ node);
+ if (!sm->forwarding_enabled)
+ {
+ if (!s0)
+ next0 = NAT44_ED_OUT2IN_NEXT_DROP;
+ goto trace0;
+ }
+ }
+
+ if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
+ {
+ next0 = icmp_out2in_ed_slow_path
+ (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
+ next0, now, thread_index, &s0);
+ goto trace0;
+ }
+ }
+ else
+ {
+ if (PREDICT_FALSE (proto0 == ~0))
+ {
+ next0 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH;
+ goto trace0;
+ }
+
+ if (ip4_is_fragment (ip0))
+ {
+ next0 = NAT44_ED_OUT2IN_NEXT_REASS;
+ goto trace0;
+ }
+
+ if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
+ {
+ next0 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH;
+ goto trace0;
+ }
+ }
+
+ make_ed_kv (&kv0, &ip0->dst_address, &ip0->src_address,
+ ip0->protocol, rx_fib_index0, udp0->dst_port,
+ udp0->src_port);
+
+ if (clib_bihash_search_16_8 (&tsm->out2in_ed, &kv0, &value0))
+ {
+ if (is_slow_path)
+ {
+ /* Try to match static mapping by external address and port,
+ destination address and port in packet */
+ e_key0.addr = ip0->dst_address;
+ e_key0.port = udp0->dst_port;
+ e_key0.protocol = proto0;
+ e_key0.fib_index = rx_fib_index0;
+ if (snat_static_mapping_match (sm, e_key0, &l_key0, 1, 0,
+ &twice_nat0, &lb_nat0,
+ &ip0->src_address))
+ {
+ /*
+ * Send DHCP packets to the ipv4 stack, or we won't
+ * be able to use dhcp client on the outside interface
+ */
+ if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_UDP
+ && (udp0->dst_port ==
+ clib_host_to_net_u16
+ (UDP_DST_PORT_dhcp_to_client))))
+ {
+ vnet_feature_next (&next0, b0);
+ goto trace0;
+ }
+
+ if (!sm->forwarding_enabled)
+ {
+ b0->error =
+ node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION];
+ next0 = NAT44_ED_OUT2IN_NEXT_DROP;
+ }
+ else
+ {
+ if (next_src_nat (sm, ip0, ip0->protocol,
+ udp0->src_port, udp0->dst_port,
+ thread_index, rx_fib_index0))
+ {
+ next0 = NAT44_ED_OUT2IN_NEXT_IN2OUT;
+ goto trace0;
+ }
+ create_bypass_for_fwd (sm, ip0, rx_fib_index0,
+ thread_index);
+ }
+ goto trace0;
+ }
+
+ /* Create session initiated by host from external network */
+ s0 = create_session_for_static_mapping_ed (sm, b0, l_key0,
+ e_key0, node,
+ thread_index,
+ twice_nat0,
+ lb_nat0, now);
+
+ if (!s0)
+ {
+ next0 = NAT44_ED_OUT2IN_NEXT_DROP;
+ goto trace0;
+ }
+ }
+ else
+ {
+ next0 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH;
+ goto trace0;
+ }
+ }
+ else
+ {
+ s0 = pool_elt_at_index (tsm->sessions, value0.value);
+ }
+
+ old_addr0 = ip0->dst_address.as_u32;
+ new_addr0 = ip0->dst_address.as_u32 = s0->in2out.addr.as_u32;
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index;
+
+ sum0 = ip0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
+ dst_address);
+ if (PREDICT_FALSE (is_twice_nat_session (s0)))
+ sum0 = ip_csum_update (sum0, ip0->src_address.as_u32,
+ s0->ext_host_nat_addr.as_u32, ip4_header_t,
+ src_address);
+ ip0->checksum = ip_csum_fold (sum0);
+
+ if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
+ {
+ old_port0 = tcp0->dst_port;
+ new_port0 = tcp0->dst_port = s0->in2out.port;
+
+ sum0 = tcp0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
+ dst_address);
+ sum0 = ip_csum_update (sum0, old_port0, new_port0, ip4_header_t,
+ length);
+ if (is_twice_nat_session (s0))
+ {
+ sum0 = ip_csum_update (sum0, ip0->src_address.as_u32,
+ s0->ext_host_nat_addr.as_u32,
+ ip4_header_t, dst_address);
+ sum0 = ip_csum_update (sum0, tcp0->src_port,
+ s0->ext_host_nat_port, ip4_header_t,
+ length);
+ tcp0->src_port = s0->ext_host_nat_port;
+ ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32;
+ }
+ tcp0->checksum = ip_csum_fold (sum0);
+ if (nat44_set_tcp_session_state_o2i
+ (sm, s0, tcp0, thread_index))
+ goto trace0;
+ }
+ else
+ {
+ udp0->dst_port = s0->in2out.port;
+ if (is_twice_nat_session (s0))
+ {
+ udp0->src_port = s0->ext_host_nat_port;
+ ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32;
+ }
+ udp0->checksum = 0;
+ }
+
+ /* Accounting */
+ nat44_session_update_counters (s0, now,
+ vlib_buffer_length_in_chain (vm,
+ b0));
+
+ trace0:
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ nat44_ed_out2in_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->is_slow_path = is_slow_path;
+ t->sw_if_index = sw_if_index0;
+ t->next_index = next0;
+ t->session_index = ~0;
+ if (s0)
+ t->session_index = s0 - tsm->sessions;
+ }
+
+ pkts_processed += next0 != NAT44_ED_OUT2IN_NEXT_DROP;
+ /* verify speculative enqueue, maybe switch current next frame */
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
+ to_next, n_left_to_next,
+ bi0, next0);
+ }
+
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
+
+ vlib_node_increment_counter (vm, stats_node_index,
+ NAT_OUT2IN_ED_ERROR_OUT2IN_PACKETS,
+ pkts_processed);
+ return frame->n_vectors;
+}
+
+static uword
+nat44_ed_out2in_fast_path_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ return nat44_ed_out2in_node_fn_inline (vm, node, frame, 0);
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (nat44_ed_out2in_node) = {
+ .function = nat44_ed_out2in_fast_path_fn,
+ .name = "nat44-ed-out2in",
+ .vector_size = sizeof (u32),
+ .format_trace = format_nat44_ed_out2in_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .n_errors = ARRAY_LEN(nat_out2in_ed_error_strings),
+ .error_strings = nat_out2in_ed_error_strings,
+ .runtime_data_bytes = sizeof (snat_runtime_t),
+ .n_next_nodes = NAT44_ED_OUT2IN_N_NEXT,
+ .next_nodes = {
+ [NAT44_ED_OUT2IN_NEXT_DROP] = "error-drop",
+ [NAT44_ED_OUT2IN_NEXT_LOOKUP] = "ip4-lookup",
+ [NAT44_ED_OUT2IN_NEXT_SLOW_PATH] = "nat44-ed-out2in-slowpath",
+ [NAT44_ED_OUT2IN_NEXT_ICMP_ERROR] = "ip4-icmp-error",
+ [NAT44_ED_OUT2IN_NEXT_IN2OUT] = "nat44-ed-in2out",
+ [NAT44_ED_OUT2IN_NEXT_REASS] = "nat44-ed-out2in-reass",
+ },
+};
+/* *INDENT-ON* */
+
+VLIB_NODE_FUNCTION_MULTIARCH (nat44_ed_out2in_node,
+ nat44_ed_out2in_fast_path_fn);
+
+static uword
+nat44_ed_out2in_slow_path_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ return nat44_ed_out2in_node_fn_inline (vm, node, frame, 1);
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (nat44_ed_out2in_slowpath_node) = {
+ .function = nat44_ed_out2in_slow_path_fn,
+ .name = "nat44-ed-out2in-slowpath",
+ .vector_size = sizeof (u32),
+ .format_trace = format_nat44_ed_out2in_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .n_errors = ARRAY_LEN(nat_out2in_ed_error_strings),
+ .error_strings = nat_out2in_ed_error_strings,
+ .runtime_data_bytes = sizeof (snat_runtime_t),
+ .n_next_nodes = NAT44_ED_OUT2IN_N_NEXT,
+ .next_nodes = {
+ [NAT44_ED_OUT2IN_NEXT_DROP] = "error-drop",
+ [NAT44_ED_OUT2IN_NEXT_LOOKUP] = "ip4-lookup",
+ [NAT44_ED_OUT2IN_NEXT_SLOW_PATH] = "nat44-ed-out2in-slowpath",
+ [NAT44_ED_OUT2IN_NEXT_ICMP_ERROR] = "ip4-icmp-error",
+ [NAT44_ED_OUT2IN_NEXT_IN2OUT] = "nat44-ed-in2out",
+ [NAT44_ED_OUT2IN_NEXT_REASS] = "nat44-ed-out2in-reass",
+ },
+};
+/* *INDENT-ON* */
+
+VLIB_NODE_FUNCTION_MULTIARCH (nat44_ed_out2in_slowpath_node,
+ nat44_ed_out2in_slow_path_fn);
+
+static uword
+nat44_ed_out2in_reass_node_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ u32 n_left_from, *from, *to_next;
+ nat44_ed_out2in_next_t next_index;
+ u32 pkts_processed = 0;
+ snat_main_t *sm = &snat_main;
+ f64 now = vlib_time_now (vm);
+ u32 thread_index = vm->thread_index;
+ snat_main_per_thread_data_t *per_thread_data =
+ &sm->per_thread_data[thread_index];
+ u32 *fragments_to_drop = 0;
+ u32 *fragments_to_loopback = 0;
+
+ from = vlib_frame_vector_args (frame);
+ n_left_from = frame->n_vectors;
+ next_index = node->cached_next_index;
+
+ while (n_left_from > 0)
+ {
+ u32 n_left_to_next;
+
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+ while (n_left_from > 0 && n_left_to_next > 0)
+ {
+ u32 bi0, sw_if_index0, proto0, rx_fib_index0, new_addr0, old_addr0;
+ vlib_buffer_t *b0;
+ u32 next0;
+ u8 cached0 = 0;
+ ip4_header_t *ip0;
+ nat_reass_ip4_t *reass0;
+ udp_header_t *udp0;
+ tcp_header_t *tcp0;
+ icmp46_header_t *icmp0;
+ clib_bihash_kv_16_8_t kv0, value0;
+ snat_session_t *s0 = 0;
+ u16 old_port0, new_port0;
+ ip_csum_t sum0;
+ snat_session_key_t e_key0, l_key0;
+ lb_nat_type_t lb0;
+ twice_nat_type_t twice_nat0;
+
+ /* speculatively enqueue b0 to the current next frame */
+ bi0 = from[0];
+ to_next[0] = bi0;
+ from += 1;
+ to_next += 1;
+ n_left_from -= 1;
+ n_left_to_next -= 1;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ next0 = NAT44_ED_OUT2IN_NEXT_LOOKUP;
+
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+ rx_fib_index0 =
+ fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
+ sw_if_index0);
+
+ if (PREDICT_FALSE (nat_reass_is_drop_frag (0)))
+ {
+ next0 = NAT44_ED_OUT2IN_NEXT_DROP;
+ b0->error = node->errors[NAT_OUT2IN_ED_ERROR_DROP_FRAGMENT];
+ goto trace0;
+ }
+
+ ip0 = (ip4_header_t *) vlib_buffer_get_current (b0);
+ udp0 = ip4_next_header (ip0);
+ tcp0 = (tcp_header_t *) udp0;
+ icmp0 = (icmp46_header_t *) udp0;
+ proto0 = ip_proto_to_snat_proto (ip0->protocol);
+
+ reass0 = nat_ip4_reass_find_or_create (ip0->src_address,
+ ip0->dst_address,
+ ip0->fragment_id,
+ ip0->protocol,
+ 1, &fragments_to_drop);
+
+ if (PREDICT_FALSE (!reass0))
+ {
+ next0 = NAT44_ED_OUT2IN_NEXT_DROP;
+ b0->error = node->errors[NAT_OUT2IN_ED_ERROR_MAX_REASS];
+ nat_log_notice ("maximum reassemblies exceeded");
+ goto trace0;
+ }
+
+ if (PREDICT_FALSE (ip4_is_first_fragment (ip0)))
+ {
+ if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
+ {
+ next0 = icmp_out2in_ed_slow_path
+ (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
+ next0, now, thread_index, &s0);
+
+ if (PREDICT_TRUE (next0 != NAT44_ED_OUT2IN_NEXT_DROP))
+ {
+ if (s0)
+ reass0->sess_index = s0 - per_thread_data->sessions;
+ else
+ reass0->flags |= NAT_REASS_FLAG_ED_DONT_TRANSLATE;
+ reass0->thread_index = thread_index;
+ nat_ip4_reass_get_frags (reass0,
+ &fragments_to_loopback);
+ }
+
+ goto trace0;
+ }
+
+ make_ed_kv (&kv0, &ip0->dst_address, &ip0->src_address,
+ ip0->protocol, rx_fib_index0, udp0->dst_port,
+ udp0->src_port);
+
+ if (clib_bihash_search_16_8
+ (&per_thread_data->out2in_ed, &kv0, &value0))
+ {
+ /* Try to match static mapping by external address and port,
+ destination address and port in packet */
+ e_key0.addr = ip0->dst_address;
+ e_key0.port = udp0->dst_port;
+ e_key0.protocol = proto0;
+ e_key0.fib_index = rx_fib_index0;
+ if (snat_static_mapping_match (sm, e_key0, &l_key0, 1, 0,
+ &twice_nat0, &lb0, 0))
+ {
+ /*
+ * Send DHCP packets to the ipv4 stack, or we won't
+ * be able to use dhcp client on the outside interface
+ */
+ if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_UDP
+ && (udp0->dst_port
+ ==
+ clib_host_to_net_u16
+ (UDP_DST_PORT_dhcp_to_client))))
+ {
+ vnet_feature_next (&next0, b0);
+ goto trace0;
+ }
+
+ if (!sm->forwarding_enabled)
+ {
+ b0->error =
+ node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION];
+ next0 = NAT44_ED_OUT2IN_NEXT_DROP;
+ }
+ else
+ {
+ if (next_src_nat (sm, ip0, ip0->protocol,
+ udp0->src_port, udp0->dst_port,
+ thread_index, rx_fib_index0))
+ {
+ next0 = NAT44_ED_OUT2IN_NEXT_IN2OUT;
+ goto trace0;
+ }
+ create_bypass_for_fwd (sm, ip0, rx_fib_index0,
+ thread_index);
+ reass0->flags |= NAT_REASS_FLAG_ED_DONT_TRANSLATE;
+ nat_ip4_reass_get_frags (reass0,
+ &fragments_to_loopback);
+ }
+ goto trace0;
+ }
+
+ /* Create session initiated by host from external network */
+ s0 = create_session_for_static_mapping_ed (sm, b0, l_key0,
+ e_key0, node,
+ thread_index,
+ twice_nat0, lb0,
+ now);
+ if (!s0)
+ {
+ b0->error =
+ node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION];
+ next0 = NAT44_ED_OUT2IN_NEXT_DROP;
+ goto trace0;
+ }
+ reass0->sess_index = s0 - per_thread_data->sessions;
+ reass0->thread_index = thread_index;
+ }
+ else
+ {
+ s0 = pool_elt_at_index (per_thread_data->sessions,
+ value0.value);
+ reass0->sess_index = value0.value;
+ }
+ nat_ip4_reass_get_frags (reass0, &fragments_to_loopback);
+ }
+ else
+ {
+ if (reass0->flags & NAT_REASS_FLAG_ED_DONT_TRANSLATE)
+ goto trace0;
+ if (PREDICT_FALSE (reass0->sess_index == (u32) ~ 0))
+ {
+ if (nat_ip4_reass_add_fragment
+ (reass0, bi0, &fragments_to_drop))
+ {
+ b0->error = node->errors[NAT_OUT2IN_ED_ERROR_MAX_FRAG];
+ nat_log_notice
+ ("maximum fragments per reassembly exceeded");
+ next0 = NAT44_ED_OUT2IN_NEXT_DROP;
+ goto trace0;
+ }
+ cached0 = 1;
+ goto trace0;
+ }
+ s0 = pool_elt_at_index (per_thread_data->sessions,
+ reass0->sess_index);
+ }
+
+ old_addr0 = ip0->dst_address.as_u32;
+ ip0->dst_address = s0->in2out.addr;
+ new_addr0 = ip0->dst_address.as_u32;
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index;
+
+ sum0 = ip0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
+ ip4_header_t,
+ dst_address /* changed member */ );
+ if (PREDICT_FALSE (is_twice_nat_session (s0)))
+ sum0 = ip_csum_update (sum0, ip0->src_address.as_u32,
+ s0->ext_host_nat_addr.as_u32, ip4_header_t,
+ src_address);
+ ip0->checksum = ip_csum_fold (sum0);
+
+ if (PREDICT_FALSE (ip4_is_first_fragment (ip0)))
+ {
+ if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
+ {
+ old_port0 = tcp0->dst_port;
+ tcp0->dst_port = s0->in2out.port;
+ new_port0 = tcp0->dst_port;
+
+ sum0 = tcp0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
+ ip4_header_t,
+ dst_address /* changed member */ );
+
+ sum0 = ip_csum_update (sum0, old_port0, new_port0,
+ ip4_header_t /* cheat */ ,
+ length /* changed member */ );
+ if (is_twice_nat_session (s0))
+ {
+ sum0 = ip_csum_update (sum0, ip0->src_address.as_u32,
+ s0->ext_host_nat_addr.as_u32,
+ ip4_header_t, dst_address);
+ sum0 = ip_csum_update (sum0, tcp0->src_port,
+ s0->ext_host_nat_port,
+ ip4_header_t, length);
+ tcp0->src_port = s0->ext_host_nat_port;
+ ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32;
+ }
+ tcp0->checksum = ip_csum_fold (sum0);
+ }
+ else
+ {
+ old_port0 = udp0->dst_port;
+ udp0->dst_port = s0->in2out.port;
+ if (is_twice_nat_session (s0))
+ {
+ udp0->src_port = s0->ext_host_nat_port;
+ ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32;
+ }
+ udp0->checksum = 0;
+ }
+ }
+
+ /* Accounting */
+ nat44_session_update_counters (s0, now,
+ vlib_buffer_length_in_chain (vm,
+ b0));
+
+ trace0:
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ nat44_reass_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->cached = cached0;
+ t->sw_if_index = sw_if_index0;
+ t->next_index = next0;
+ }
+
+ if (cached0)
+ {
+ n_left_to_next++;
+ to_next--;
+ }
+ else
+ {
+ pkts_processed += next0 != NAT44_ED_OUT2IN_NEXT_DROP;
+
+ /* verify speculative enqueue, maybe switch current next frame */
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
+ to_next, n_left_to_next,
+ bi0, next0);
+ }
+
+ if (n_left_from == 0 && vec_len (fragments_to_loopback))
+ {
+ from = vlib_frame_vector_args (frame);
+ u32 len = vec_len (fragments_to_loopback);
+ if (len <= VLIB_FRAME_SIZE)
+ {
+ clib_memcpy (from, fragments_to_loopback,
+ sizeof (u32) * len);
+ n_left_from = len;
+ vec_reset_length (fragments_to_loopback);
+ }
+ else
+ {
+ clib_memcpy (from,
+ fragments_to_loopback + (len -
+ VLIB_FRAME_SIZE),
+ sizeof (u32) * VLIB_FRAME_SIZE);
+ n_left_from = VLIB_FRAME_SIZE;
+ _vec_len (fragments_to_loopback) = len - VLIB_FRAME_SIZE;
+ }
+ }
+ }
+
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
+
+ vlib_node_increment_counter (vm, nat44_ed_out2in_reass_node.index,
+ NAT_OUT2IN_ED_ERROR_OUT2IN_PACKETS,
+ pkts_processed);
+
+ nat_send_all_to_node (vm, fragments_to_drop, node,
+ &node->errors[NAT_OUT2IN_ED_ERROR_DROP_FRAGMENT],
+ NAT44_ED_OUT2IN_NEXT_DROP);
+
+ vec_free (fragments_to_drop);
+ vec_free (fragments_to_loopback);
+ return frame->n_vectors;
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (nat44_ed_out2in_reass_node) = {
+ .function = nat44_ed_out2in_reass_node_fn,
+ .name = "nat44-ed-out2in-reass",
+ .vector_size = sizeof (u32),
+ .format_trace = format_nat44_reass_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .n_errors = ARRAY_LEN(nat_out2in_ed_error_strings),
+ .error_strings = nat_out2in_ed_error_strings,
+ .n_next_nodes = NAT44_ED_OUT2IN_N_NEXT,
+ .next_nodes = {
+ [NAT44_ED_OUT2IN_NEXT_DROP] = "error-drop",
+ [NAT44_ED_OUT2IN_NEXT_LOOKUP] = "ip4-lookup",
+ [NAT44_ED_OUT2IN_NEXT_SLOW_PATH] = "nat44-ed-out2in-slowpath",
+ [NAT44_ED_OUT2IN_NEXT_ICMP_ERROR] = "ip4-icmp-error",
+ [NAT44_ED_OUT2IN_NEXT_IN2OUT] = "nat44-ed-in2out",
+ [NAT44_ED_OUT2IN_NEXT_REASS] = "nat44-ed-out2in-reass",
+ },
+};
+/* *INDENT-ON* */
+
+VLIB_NODE_FUNCTION_MULTIARCH (nat44_ed_out2in_reass_node,
+ nat44_ed_out2in_reass_node_fn);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
Code Review / vpp.git / commitdiff