* 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/udp/udp_local.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/lib/ipfix_logging.h>
+#include <nat/nat_inlines.h>
+#include <nat/nat44/inlines.h>
+#include <nat/lib/nat_syslog.h>
+#include <nat/nat_ha.h>
#include <vppinfra/hash.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);
+ 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");
-
- 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;
-
#define foreach_snat_out2in_error \
-_(UNSUPPORTED_PROTOCOL, "Unsupported protocol") \
-_(OUT2IN_PACKETS, "Good out2in packets processed") \
+_(UNSUPPORTED_PROTOCOL, "unsupported protocol") \
+_(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")
+_(NO_TRANSLATION, "no translation") \
+_(MAX_SESSIONS_EXCEEDED, "maximum sessions exceeded") \
+_(CANNOT_CREATE_USER, "cannot create NAT user")
-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_REASS,
SNAT_OUT2IN_N_NEXT,
} snat_out2in_next_t;
+#ifndef CLIB_MARCH_VARIANT
+int
+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);
+ 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);
+ if (ctx->now >= sess_timeout_time)
+ {
+ init_nat_i2o_k (&s_kv, s);
+ if (clib_bihash_add_del_8_8 (&tsm->in2out, &s_kv, 0))
+ nat_elog_warn ("out2in key del failed");
+
+ nat_ipfix_logging_nat44_ses_delete (ctx->thread_index,
+ s->in2out.addr.as_u32,
+ s->out2in.addr.as_u32,
+ s->nat_proto,
+ s->in2out.port,
+ s->out2in.port,
+ s->in2out.fib_index);
+
+ nat_syslog_nat44_apmdel (s->user_index, s->in2out.fib_index,
+ &s->in2out.addr, s->in2out.port,
+ &s->out2in.addr, s->out2in.port, s->nat_proto);
+
+ nat_ha_sdel (&s->out2in.addr, s->out2in.port, &s->ext_host_addr,
+ s->ext_host_port, s->nat_proto, s->out2in.fib_index,
+ ctx->thread_index);
+
+ if (!snat_is_session_static (s))
+ snat_free_outside_address_and_port (sm->addresses, ctx->thread_index,
+ &s->out2in.addr, s->out2in.port,
+ s->nat_proto);
+
+ nat44_delete_session (sm, s, ctx->thread_index);
+ return 1;
+ }
+
+ return 0;
+}
+#endif
+
/**
* @brief Create session for static mapping.
*
* @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)
+create_session_for_static_mapping (snat_main_t * sm,
+ vlib_buffer_t * b0,
+ ip4_address_t i2o_addr,
+ u16 i2o_port,
+ u32 i2o_fib_index,
+ ip4_address_t o2i_addr,
+ u16 o2i_port,
+ u32 o2i_fib_index,
+ nat_protocol_t proto,
+ vlib_node_runtime_t * node,
+ u32 thread_index, f64 now)
{
snat_user_t *u;
- snat_user_key_t user_key;
snat_session_t *s;
- clib_bihash_kv_8_8_t kv0, value0;
- dlist_elt_t * per_user_translation_list_elt;
- dlist_elt_t * per_user_list_head_elt;
+ clib_bihash_kv_8_8_t kv0;
ip4_header_t *ip0;
udp_header_t *udp0;
+ nat44_is_idle_session_ctx_t ctx0;
- if (PREDICT_FALSE (maximum_sessions_exceeded(sm, thread_index)))
+ if (PREDICT_FALSE (nat44_maximum_sessions_exceeded (sm, thread_index)))
{
b0->error = node->errors[SNAT_OUT2IN_ERROR_MAX_SESSIONS_EXCEEDED];
+ nat_elog_notice ("maximum sessions exceeded");
return 0;
}
ip0 = vlib_buffer_get_current (b0);
udp0 = ip4_next_header (ip0);
- user_key.addr = in2out.addr;
- user_key.fib_index = in2out.fib_index;
- kv0.key = user_key.as_u64;
-
- /* Ever heard of the "user" = inside ip4 address before? */
- if (clib_bihash_search_8_8 (&sm->per_thread_data[thread_index].user_hash,
- &kv0, &value0))
+ u = nat_user_get_or_create (sm, &i2o_addr, i2o_fib_index, thread_index);
+ if (!u)
{
- /* no, make a new one */
- pool_get (sm->per_thread_data[thread_index].users, u);
- memset (u, 0, sizeof (*u));
- u->addr = in2out.addr;
- u->fib_index = in2out.fib_index;
-
- pool_get (sm->per_thread_data[thread_index].list_pool,
- per_user_list_head_elt);
-
- u->sessions_per_user_list_head_index = per_user_list_head_elt -
- sm->per_thread_data[thread_index].list_pool;
-
- clib_dlist_init (sm->per_thread_data[thread_index].list_pool,
- u->sessions_per_user_list_head_index);
-
- kv0.value = u - sm->per_thread_data[thread_index].users;
-
- /* add user */
- clib_bihash_add_del_8_8 (&sm->per_thread_data[thread_index].user_hash,
- &kv0, 1 /* is_add */);
+ b0->error = node->errors[SNAT_OUT2IN_ERROR_CANNOT_CREATE_USER];
+ return 0;
}
- else
+
+ s = nat_session_alloc_or_recycle (sm, u, thread_index, now);
+ if (!s)
{
- u = pool_elt_at_index (sm->per_thread_data[thread_index].users,
- value0.value);
+ nat44_delete_user_with_no_session (sm, u, thread_index);
+ nat_elog_warn ("create NAT session failed");
+ return 0;
}
- pool_get (sm->per_thread_data[thread_index].sessions, s);
- memset (s, 0, sizeof (*s));
-
- 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;
- u->nstaticsessions++;
-
- /* Create list elts */
- pool_get (sm->per_thread_data[thread_index].list_pool,
- per_user_translation_list_elt);
- clib_dlist_init (sm->per_thread_data[thread_index].list_pool,
- per_user_translation_list_elt -
- sm->per_thread_data[thread_index].list_pool);
-
- per_user_translation_list_elt->value =
- s - sm->per_thread_data[thread_index].sessions;
- s->per_user_index =
- per_user_translation_list_elt - sm->per_thread_data[thread_index].list_pool;
- s->per_user_list_head_index = u->sessions_per_user_list_head_index;
-
- clib_dlist_addtail (sm->per_thread_data[thread_index].list_pool,
- s->per_user_list_head_index,
- per_user_translation_list_elt -
- sm->per_thread_data[thread_index].list_pool);
-
- s->in2out = in2out;
- s->out2in = out2in;
- s->in2out.protocol = out2in.protocol;
+ user_session_increment (sm, u, 1 /* static */ );
+ s->in2out.addr = i2o_addr;
+ s->in2out.port = i2o_port;
+ s->in2out.fib_index = i2o_fib_index;
+ s->out2in.addr = o2i_addr;
+ s->out2in.port = o2i_port;
+ s->out2in.fib_index = o2i_fib_index;
+ s->nat_proto = proto;
/* Add to translation hashes */
- kv0.key = s->in2out.as_u64;
- kv0.value = s - sm->per_thread_data[thread_index].sessions;
- if (clib_bihash_add_del_8_8 (&sm->per_thread_data[thread_index].in2out, &kv0,
- 1 /* is_add */))
- clib_warning ("in2out key add failed");
-
- kv0.key = s->out2in.as_u64;
- kv0.value = s - sm->per_thread_data[thread_index].sessions;
-
- if (clib_bihash_add_del_8_8 (&sm->per_thread_data[thread_index].out2in, &kv0,
- 1 /* is_add */))
- clib_warning ("out2in key add failed");
+ ctx0.now = now;
+ ctx0.thread_index = thread_index;
+ init_nat_i2o_kv (&kv0, s, 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_elog_notice ("in2out key add failed");
+
+ init_nat_o2i_kv (&kv0, s, 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_elog_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);
- return s;
+ nat_ipfix_logging_nat44_ses_create (thread_index,
+ s->in2out.addr.as_u32,
+ s->out2in.addr.as_u32,
+ s->nat_proto,
+ s->in2out.port,
+ s->out2in.port, s->in2out.fib_index);
+
+ nat_syslog_nat44_apmadd (s->user_index, s->in2out.fib_index,
+ &s->in2out.addr, s->in2out.port, &s->out2in.addr,
+ s->out2in.port, s->nat_proto);
+
+ nat_ha_sadd (&s->in2out.addr, s->in2out.port, &s->out2in.addr,
+ s->out2in.port, &s->ext_host_addr, s->ext_host_port,
+ &s->ext_host_nat_addr, s->ext_host_nat_port,
+ s->nat_proto, s->in2out.fib_index, s->flags, thread_index, 0);
+
+ return s;
}
-static_always_inline
-snat_out2in_error_t icmp_get_key(ip4_header_t *ip0,
- snat_session_key_t *p_key0)
+#ifndef CLIB_MARCH_VARIANT
+static_always_inline snat_out2in_error_t
+icmp_get_key (vlib_buffer_t * b, ip4_header_t * ip0,
+ ip4_address_t * addr, u16 * port, nat_protocol_t * nat_proto)
{
icmp46_header_t *icmp0;
- snat_session_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);
+ echo0 = (icmp_echo_header_t *) (icmp0 + 1);
- if (!icmp_is_error_message (icmp0))
+ if (!icmp_type_is_error_message
+ (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags))
{
- key0.protocol = SNAT_PROTOCOL_ICMP;
- key0.addr = ip0->dst_address;
- key0.port = echo0->identifier;
+ *nat_proto = NAT_PROTOCOL_ICMP;
+ *addr = ip0->dst_address;
+ *port = vnet_buffer (b)->ip.reass.l4_src_port;
}
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;
- }
+ *nat_proto = ip_proto_to_nat_proto (inner_ip0->protocol);
+ *addr = inner_ip0->src_address;
+ switch (*nat_proto)
+ {
+ case NAT_PROTOCOL_ICMP:
+ inner_icmp0 = (icmp46_header_t *) l4_header;
+ inner_echo0 = (icmp_echo_header_t *) (inner_icmp0 + 1);
+ *port = inner_echo0->identifier;
+ break;
+ case NAT_PROTOCOL_UDP:
+ case NAT_PROTOCOL_TCP:
+ *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[in,out] node NAT node runtime
* @param[in] thread_index thread index
* @param[in,out] b0 buffer containing packet to be translated
+ * @param[in,out] ip0 ip header
* @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_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, ip4_address_t * addr,
+ u16 * port, u32 * fib_index,
+ nat_protocol_t * proto, void *d, void *e,
+ u8 * dont_translate)
{
- icmp46_header_t *icmp0;
+ snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
u32 sw_if_index0;
- u32 rx_fib_index0;
- snat_session_key_t key0;
- snat_session_key_t sm0;
snat_session_t *s0 = 0;
- u8 dont_translate = 0;
clib_bihash_kv_8_8_t kv0, value0;
u8 is_addr_only;
u32 next0 = ~0;
int err;
+ u8 identity_nat;
+ vlib_main_t *vm = vlib_get_main ();
+ *dont_translate = 0;
- icmp0 = (icmp46_header_t *) ip4_next_header (ip0);
- 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];
+ *fib_index = ip4_fib_table_get_index_for_sw_if_index (sw_if_index0);
- key0.protocol = 0;
+ *proto = 0;
- err = icmp_get_key (ip0, &key0);
+ err = icmp_get_key (b0, ip0, addr, port, proto);
if (err != -1)
{
b0->error = node->errors[SNAT_OUT2IN_ERROR_UNSUPPORTED_PROTOCOL];
next0 = SNAT_OUT2IN_NEXT_DROP;
goto out;
}
- key0.fib_index = rx_fib_index0;
- kv0.key = key0.as_u64;
+ ip4_address_t mapping_addr;
+ u16 mapping_port;
+ u32 mapping_fib_index;
- if (clib_bihash_search_8_8 (&sm->per_thread_data[thread_index].out2in, &kv0,
- &value0))
+ init_nat_k (&kv0, *addr, *port, *fib_index, *proto);
+ if (clib_bihash_search_8_8 (&tsm->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, &is_addr_only))
- {
- /* 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;
- }
-
- 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, *addr, *port, *fib_index, *proto,
+ &mapping_addr, &mapping_port, &mapping_fib_index, 1, &is_addr_only,
+ 0, 0, 0, &identity_nat, 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
+ (vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags !=
+ ICMP4_echo_reply
+ && (vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags !=
+ ICMP4_echo_request || !is_addr_only)))
+ {
+ b0->error = node->errors[SNAT_OUT2IN_ERROR_BAD_ICMP_TYPE];
+ next0 = SNAT_OUT2IN_NEXT_DROP;
+ goto out;
+ }
+ if (PREDICT_FALSE (identity_nat))
+ {
+ *dont_translate = 1;
+ goto out;
+ }
/* Create session initiated by host from external network */
- s0 = create_session_for_static_mapping(sm, b0, sm0, key0,
- node, thread_index);
+ s0 =
+ create_session_for_static_mapping (sm, b0, mapping_addr, mapping_port,
+ mapping_fib_index, *addr, *port,
+ *fib_index, *proto, node,
+ thread_index, vlib_time_now (vm));
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;
- }
-
- s0 = pool_elt_at_index (sm->per_thread_data[thread_index].sessions,
- value0.value);
+ if (PREDICT_FALSE
+ (vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags !=
+ ICMP4_echo_reply
+ && vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags !=
+ ICMP4_echo_request
+ && !icmp_type_is_error_message (vnet_buffer (b0)->ip.
+ reass.icmp_type_or_tcp_flags)))
+ {
+ b0->error = node->errors[SNAT_OUT2IN_ERROR_BAD_ICMP_TYPE];
+ next0 = SNAT_OUT2IN_NEXT_DROP;
+ goto out;
+ }
+
+ s0 = pool_elt_at_index (tsm->sessions, value0.value);
}
out:
- *p_proto = key0.protocol;
if (s0)
- *p_value = s0->in2out;
- *p_dont_translate = dont_translate;
+ {
+ *addr = s0->in2out.addr;
+ *port = s0->in2out.port;
+ *fib_index = s0->in2out.fib_index;
+ }
if (d)
- *(snat_session_t**)d = s0;
+ *(snat_session_t **) d = s0;
return next0;
}
+#endif
+#ifndef CLIB_MARCH_VARIANT
/**
* Get address and port values to be used for ICMP packet translation
*
* @param[in,out] node NAT node runtime
* @param[in] thread_index thread index
* @param[in,out] b0 buffer containing packet to be translated
+ * @param[in,out] ip0 ip header
* @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_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, ip4_address_t * mapping_addr,
+ u16 * mapping_port, u32 * mapping_fib_index,
+ nat_protocol_t * proto, void *d, void *e,
+ u8 * dont_translate)
{
- icmp46_header_t *icmp0;
u32 sw_if_index0;
u32 rx_fib_index0;
- snat_session_key_t key0;
- snat_session_key_t sm0;
- u8 dont_translate = 0;
u8 is_addr_only;
u32 next0 = ~0;
int err;
+ ip4_address_t addr;
+ u16 port;
+ *dont_translate = 0;
- 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);
+ err = icmp_get_key (b0, ip0, &addr, &port, proto);
if (err != -1)
{
b0->error = node->errors[err];
next0 = SNAT_OUT2IN_NEXT_DROP;
- goto out2;
+ goto out;
}
- key0.fib_index = rx_fib_index0;
-
- if (snat_static_mapping_match(sm, key0, &sm0, 1, &is_addr_only))
+ if (snat_static_mapping_match
+ (sm, addr, port, rx_fib_index0, *proto, mapping_addr, mapping_port,
+ mapping_fib_index, 1, &is_addr_only, 0, 0, 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
+ (vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags != ICMP4_echo_reply
+ && (vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags !=
+ ICMP4_echo_request || !is_addr_only)
+ && !icmp_type_is_error_message (vnet_buffer (b0)->ip.
+ reass.icmp_type_or_tcp_flags)))
{
b0->error = node->errors[SNAT_OUT2IN_ERROR_BAD_ICMP_TYPE];
next0 = SNAT_OUT2IN_NEXT_DROP;
}
out:
- *p_value = sm0;
-out2:
- *p_proto = key0.protocol;
- *p_dont_translate = dont_translate;
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)
+#endif
+
+#ifndef CLIB_MARCH_VARIANT
+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;
icmp_echo_header_t *echo0, *inner_echo0 = 0;
ip4_header_t *inner_ip0 = 0;
void *l4_header = 0;
ip_csum_t sum0;
u16 checksum0;
u32 next0_tmp;
+ vlib_main_t *vm = vlib_get_main ();
+ ip4_address_t addr;
+ u16 port;
+ u32 fib_index;
+ nat_protocol_t proto;
- 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,
+ &addr, &port, &fib_index, &proto,
+ d, e, &dont_translate);
if (next0_tmp != ~0)
next0 = next0_tmp;
if (next0 == SNAT_OUT2IN_NEXT_DROP || dont_translate)
goto out;
- sum0 = ip_incremental_checksum (0, icmp0,
- ntohs(ip0->length) - ip4_header_bytes (ip0));
- checksum0 = ~ip_csum_fold (sum0);
- if (checksum0 != 0 && checksum0 != 0xffff)
+ if (PREDICT_TRUE (!ip4_is_fragment (ip0)))
{
- next0 = SNAT_OUT2IN_NEXT_DROP;
- goto out;
+ sum0 =
+ ip_incremental_checksum_buffer (vm, b0,
+ (u8 *) icmp0 -
+ (u8 *) vlib_buffer_get_current (b0),
+ ntohs (ip0->length) -
+ ip4_header_bytes (ip0), 0);
+ checksum0 = ~ip_csum_fold (sum0);
+ if (checksum0 != 0 && checksum0 != 0xffff)
+ {
+ 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;
+ new_addr0 = ip0->dst_address.as_u32 = addr.as_u32;
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = 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 (!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);
- }
- }
- else
+
+ if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
{
- inner_ip0 = (ip4_header_t *)(echo0+1);
- l4_header = ip4_next_header (inner_ip0);
+ if (icmp0->checksum == 0)
+ icmp0->checksum = 0xffff;
+
+ if (!icmp_type_is_error_message (icmp0->type))
+ {
+ new_id0 = port;
+ if (PREDICT_FALSE (new_id0 != echo0->identifier))
+ {
+ old_id0 = echo0->identifier;
+ new_id0 = 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);
+ l4_header = ip4_next_header (inner_ip0);
+
+ if (!ip4_header_checksum_is_valid (inner_ip0))
+ {
+ next0 = SNAT_OUT2IN_NEXT_DROP;
+ goto out;
+ }
- if (!ip4_header_checksum_is_valid (inner_ip0))
- {
- next0 = SNAT_OUT2IN_NEXT_DROP;
- goto out;
- }
-
- old_addr0 = inner_ip0->src_address.as_u32;
- inner_ip0->src_address = sm0.addr;
- 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 /* 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);
- }
+ old_addr0 = inner_ip0->src_address.as_u32;
+ inner_ip0->src_address = addr;
+ 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 /* changed member */ );
+ icmp0->checksum = ip_csum_fold (sum0);
+
+ switch (proto)
+ {
+ case NAT_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 = 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 NAT_PROTOCOL_UDP:
+ case NAT_PROTOCOL_TCP:
+ old_id0 = ((tcp_udp_header_t *) l4_header)->src_port;
+ new_id0 = 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:
return next0;
}
-
-
-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)
+#endif
+
+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))
+ vlib_main_t *vm = vlib_get_main ();
+
+ 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 */
- s0->last_heard = now;
- s0->total_pkts++;
- s0->total_bytes += vlib_buffer_length_in_chain (sm->vlib_main, b0);
- /* Per-user LRU list maintenance for dynamic translation */
- if (!snat_is_session_static (s0))
- {
- clib_dlist_remove (sm->per_thread_data[thread_index].list_pool,
- s0->per_user_index);
- clib_dlist_addtail (sm->per_thread_data[thread_index].list_pool,
- s0->per_user_list_head_index,
- s0->per_user_index);
- }
+ nat44_session_update_counters (s0, now,
+ vlib_buffer_length_in_chain
+ (vm, b0), thread_index);
+ /* Per-user LRU list maintenance */
+ nat44_session_update_lru (sm, s0, thread_index);
}
return next0;
}
-static snat_session_t *
-snat_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)
+static int
+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;
- clib_bihash_kv_16_8_t s_kv, s_value;
snat_static_mapping_t *m;
- snat_session_key_t m_key;
u32 old_addr, new_addr;
ip_csum_t sum;
- nat_ed_ses_key_t key;
- snat_session_t * s;
- snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
- snat_user_key_t u_key;
- snat_user_t *u;
- dlist_elt_t *head, *elt;
- old_addr = ip->dst_address.as_u32;
+ init_nat_k (&kv, ip->dst_address, 0, 0, 0);
+ if (clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value))
+ return 1;
- key.l_addr = ip->dst_address;
- key.r_addr = ip->src_address;
- key.fib_index = rx_fib_index;
- key.proto = ip->protocol;
- key.rsvd = 0;
- key.l_port = 0;
- s_kv.key[0] = key.as_u64[0];
- s_kv.key[1] = key.as_u64[1];
+ m = pool_elt_at_index (sm->static_mappings, value.value);
- if (!clib_bihash_search_16_8 (&sm->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];
- return 0;
- }
-
- m_key.addr = ip->dst_address;
- m_key.port = 0;
- m_key.protocol = 0;
- m_key.fib_index = rx_fib_index;
- kv.key = m_key.as_u64;
- 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_key.addr = ip->src_address;
- u_key.fib_index = m->fib_index;
- kv.key = u_key.as_u64;
-
- /* Ever heard of the "user" = src ip4 address before? */
- if (clib_bihash_search_8_8 (&tsm->user_hash, &kv, &value))
- {
- /* no, make a new one */
- pool_get (tsm->users, u);
- memset (u, 0, sizeof (*u));
- u->addr = ip->src_address;
- u->fib_index = rx_fib_index;
-
- pool_get (tsm->list_pool, head);
- u->sessions_per_user_list_head_index = head - tsm->list_pool;
-
- clib_dlist_init (tsm->list_pool,
- u->sessions_per_user_list_head_index);
-
- kv.value = u - tsm->users;
-
- /* add user */
- clib_bihash_add_del_8_8 (&tsm->user_hash, &kv, 1);
- }
- else
- {
- u = pool_elt_at_index (tsm->users, value.value);
- }
-
- /* Create a new session */
- pool_get (tsm->sessions, s);
- memset (s, 0, sizeof (*s));
-
- 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->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;
- u->nstaticsessions++;
-
- /* Create list elts */
- pool_get (tsm->list_pool, elt);
- clib_dlist_init (tsm->list_pool, elt - tsm->list_pool);
- elt->value = s - tsm->sessions;
- s->per_user_index = 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,
- s->per_user_index);
-
- /* Add to lookup tables */
- s_kv.value = s - tsm->sessions;
- if (clib_bihash_add_del_16_8 (&sm->out2in_ed, &s_kv, 1))
- clib_warning ("out2in key add failed");
-
- key.l_addr = ip->dst_address;
- key.fib_index = m->fib_index;
- s_kv.key[0] = key.as_u64[0];
- s_kv.key[1] = key.as_u64[1];
- if (clib_bihash_add_del_16_8 (&sm->in2out_ed, &s_kv, 1))
- clib_warning ("in2out key add failed");
- }
-
- /* Update IP checksum */
+ 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);
- vnet_buffer(b)->sw_if_index[VLIB_TX] = s->in2out.fib_index;
-
- /* Accounting */
- s->last_heard = now;
- s->total_pkts++;
- s->total_bytes += vlib_buffer_length_in_chain (vm, b);
- /* Per-user LRU list maintenance */
- clib_dlist_remove (tsm->list_pool, s->per_user_index);
- clib_dlist_addtail (tsm->list_pool, s->per_user_list_head_index,
- s->per_user_index);
-
- return s;
+ vnet_buffer (b)->sw_if_index[VLIB_TX] = m->fib_index;
+ return 0;
}
-static snat_session_t *
-snat_out2in_lb (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)
+VLIB_NODE_FN (snat_out2in_node) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
{
- nat_ed_ses_key_t key;
- clib_bihash_kv_16_8_t s_kv, s_value;
- udp_header_t *udp = ip4_next_header (ip);
- tcp_header_t *tcp = (tcp_header_t *) udp;
- snat_session_t *s = 0;
+ u32 n_left_from, *from;
+ 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];
- snat_session_key_t e_key, l_key;
- clib_bihash_kv_8_8_t kv, value;
- u32 old_addr, new_addr;
- u32 proto = ip_proto_to_snat_proto (ip->protocol);
- u16 new_port, old_port;
- ip_csum_t sum;
- snat_user_key_t u_key;
- snat_user_t *u;
- dlist_elt_t *head, *elt;
- old_addr = ip->dst_address.as_u32;
+ from = vlib_frame_vector_args (frame);
+ n_left_from = frame->n_vectors;
- key.l_addr = ip->dst_address;
- key.r_addr = ip->src_address;
- key.fib_index = rx_fib_index;
- key.proto = ip->protocol;
- key.rsvd = 0;
- key.l_port = udp->dst_port;
- s_kv.key[0] = key.as_u64[0];
- s_kv.key[1] = key.as_u64[1];
+ vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
+ u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
+ vlib_get_buffers (vm, from, b, n_left_from);
- if (!clib_bihash_search_16_8 (&sm->out2in_ed, &s_kv, &s_value))
- {
- s = pool_elt_at_index (tsm->sessions, s_value.value);
- }
- else
+ while (n_left_from >= 2)
{
- if (PREDICT_FALSE (maximum_sessions_exceeded(sm, thread_index)))
- {
- b->error = node->errors[SNAT_OUT2IN_ERROR_MAX_SESSIONS_EXCEEDED];
- return 0;
- }
-
- e_key.addr = ip->dst_address;
- e_key.port = udp->dst_port;
- e_key.protocol = proto;
- e_key.fib_index = rx_fib_index;
- if (snat_static_mapping_match(sm, e_key, &l_key, 1, 0))
- return 0;
-
- u_key.addr = l_key.addr;
- u_key.fib_index = l_key.fib_index;
- kv.key = u_key.as_u64;
-
- /* Ever heard of the "user" = src ip4 address before? */
- if (clib_bihash_search_8_8 (&tsm->user_hash, &kv, &value))
- {
- /* no, make a new one */
- pool_get (tsm->users, u);
- memset (u, 0, sizeof (*u));
- u->addr = l_key.addr;
- u->fib_index = l_key.fib_index;
-
- pool_get (tsm->list_pool, head);
- u->sessions_per_user_list_head_index = head - tsm->list_pool;
-
- clib_dlist_init (tsm->list_pool,
- u->sessions_per_user_list_head_index);
-
- kv.value = u - tsm->users;
-
- /* add user */
- if (clib_bihash_add_del_8_8 (&tsm->user_hash, &kv, 1))
- clib_warning ("user key add failed");
- }
- else
- {
- u = pool_elt_at_index (tsm->users, value.value);
- }
-
- /* Create a new session */
- pool_get (tsm->sessions, s);
- memset (s, 0, sizeof (*s));
-
- s->ext_host_addr.as_u32 = ip->src_address.as_u32;
- s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING;
- s->flags |= SNAT_SESSION_FLAG_LOAD_BALANCING;
- s->outside_address_index = ~0;
- s->out2in = e_key;
- s->in2out = l_key;
- u->nstaticsessions++;
-
- /* Create list elts */
- pool_get (tsm->list_pool, elt);
- clib_dlist_init (tsm->list_pool, elt - tsm->list_pool);
- elt->value = s - tsm->sessions;
- s->per_user_index = 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,
- s->per_user_index);
-
- /* Add to lookup tables */
- s_kv.value = s - tsm->sessions;
- if (clib_bihash_add_del_16_8 (&sm->out2in_ed, &s_kv, 1))
- clib_warning ("out2in-ed key add failed");
-
- key.l_addr = l_key.addr;
- key.fib_index = l_key.fib_index;
- key.l_port = l_key.port;
- s_kv.key[0] = key.as_u64[0];
- s_kv.key[1] = key.as_u64[1];
- if (clib_bihash_add_del_16_8 (&sm->in2out_ed, &s_kv, 1))
- clib_warning ("in2out-ed key add failed");
- }
+ 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;
+ 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;
+ u8 identity_nat0, identity_nat1;
+ ip4_address_t sm_addr0, sm_addr1;
+ u16 sm_port0, sm_port1;
+ u32 sm_fib_index0, sm_fib_index1;
+
+ b0 = *b;
+ b++;
+ b1 = *b;
+ b++;
+
+ /* Prefetch next iteration. */
+ if (PREDICT_TRUE (n_left_from >= 4))
+ {
+ vlib_buffer_t *p2, *p3;
- new_addr = ip->dst_address.as_u32 = s->in2out.addr.as_u32;
+ p2 = *b;
+ p3 = *(b + 1);
- /* 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);
+ vlib_prefetch_buffer_header (p2, LOAD);
+ vlib_prefetch_buffer_header (p3, LOAD);
- if (PREDICT_TRUE(proto == SNAT_PROTOCOL_TCP))
- {
- old_port = tcp->dst_port;
- tcp->dst_port = s->in2out.port;
- new_port = tcp->dst_port;
-
- sum = tcp->checksum;
- sum = ip_csum_update (sum, old_addr, new_addr, ip4_header_t, dst_address);
- sum = ip_csum_update (sum, old_port, new_port, ip4_header_t, length);
- tcp->checksum = ip_csum_fold(sum);
- }
- else
- {
- udp->dst_port = s->in2out.port;
- udp->checksum = 0;
- }
+ CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, LOAD);
+ CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, LOAD);
+ }
- vnet_buffer(b)->sw_if_index[VLIB_TX] = s->in2out.fib_index;
+ vnet_buffer (b0)->snat.flags = 0;
+ vnet_buffer (b1)->snat.flags = 0;
- /* Accounting */
- s->last_heard = now;
- s->total_pkts++;
- s->total_bytes += vlib_buffer_length_in_chain (vm, b);
- return s;
-}
+ ip0 = vlib_buffer_get_current (b0);
+ udp0 = ip4_next_header (ip0);
+ tcp0 = (tcp_header_t *) udp0;
+ icmp0 = (icmp46_header_t *) udp0;
-static uword
-snat_out2in_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 = vlib_get_thread_index ();
+ 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);
- from = vlib_frame_vector_args (frame);
- n_left_from = frame->n_vectors;
- next_index = node->cached_next_index;
+ 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;
+ }
- while (n_left_from > 0)
- {
- u32 n_left_to_next;
+ proto0 = ip_proto_to_nat_proto (ip0->protocol);
+
+ if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER))
+ {
+ 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;
+ }
+ }
+ vlib_increment_simple_counter (&sm->counters.slowpath.out2in.other,
+ thread_index, sw_if_index0, 1);
- vlib_get_next_frame (vm, node, next_index,
- to_next, n_left_to_next);
+ goto trace0;
+ }
- while (n_left_from >= 4 && n_left_to_next >= 2)
+ if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP))
{
- 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;
-
- 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);
-
- 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;
-
- 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))
- {
- s0 = snat_out2in_unknown_proto(sm, b0, ip0, rx_fib_index0,
- thread_index, now, vm, node);
- if (!s0)
- 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))
- {
- b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
- /*
- * Send DHCP packets to the ipv4 stack, or we won't
- * be able to use dhcp client on the outside interface
- */
- if (proto0 != SNAT_PROTOCOL_UDP
- || (udp0->dst_port
- != clib_host_to_net_u16(UDP_DST_PORT_dhcp_to_client)))
- 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);
- if (!s0)
- {
- next0 = SNAT_OUT2IN_NEXT_DROP;
- goto trace0;
- }
- }
- else
- {
- if (PREDICT_FALSE (value0.value == ~0ULL))
- {
- s0 = snat_out2in_lb(sm, b0, ip0, rx_fib_index0, thread_index,
- now, vm, node);
- 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 */
- s0->last_heard = now;
- s0->total_pkts++;
- s0->total_bytes += vlib_buffer_length_in_chain (vm, b0);
- /* Per-user LRU list maintenance for dynamic translation */
- if (!snat_is_session_static (s0))
- {
- clib_dlist_remove (sm->per_thread_data[thread_index].list_pool,
- s0->per_user_index);
- clib_dlist_addtail (sm->per_thread_data[thread_index].list_pool,
- s0->per_user_list_head_index,
- s0->per_user_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))
- {
- s1 = snat_out2in_unknown_proto(sm, b1, ip1, rx_fib_index1,
- thread_index, now, vm, node);
- if (!s1)
- 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))
- {
- b1->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
- /*
- * Send DHCP packets to the ipv4 stack, or we won't
- * be able to use dhcp client on the outside interface
- */
- if (proto1 != SNAT_PROTOCOL_UDP
- || (udp1->dst_port
- != clib_host_to_net_u16(UDP_DST_PORT_dhcp_to_client)))
- 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);
- if (!s1)
- {
- next1 = SNAT_OUT2IN_NEXT_DROP;
- goto trace1;
- }
- }
- else
- {
- if (PREDICT_FALSE (value1.value == ~0ULL))
- {
- s1 = snat_out2in_lb(sm, b1, ip1, rx_fib_index1, thread_index,
- now, vm, node);
- 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 */
- s1->last_heard = now;
- s1->total_pkts++;
- s1->total_bytes += vlib_buffer_length_in_chain (vm, b1);
- /* Per-user LRU list maintenance for dynamic translation */
- if (!snat_is_session_static (s1))
- {
- clib_dlist_remove (sm->per_thread_data[thread_index].list_pool,
- s1->per_user_index);
- clib_dlist_addtail (sm->per_thread_data[thread_index].list_pool,
- s1->per_user_list_head_index,
- s1->per_user_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)
+ next0 = icmp_out2in_slow_path
+ (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
+ next0, now, thread_index, &s0);
+ vlib_increment_simple_counter (&sm->counters.slowpath.out2in.icmp,
+ thread_index, sw_if_index0, 1);
+ goto trace0;
+ }
+
+ init_nat_k (&kv0, ip0->dst_address,
+ vnet_buffer (b0)->ip.reass.l4_dst_port, rx_fib_index0,
+ proto0);
+ if (clib_bihash_search_8_8
+ (&sm->per_thread_data[thread_index].out2in, &kv0, &value0))
{
- 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;
- to_next += 1;
- n_left_from -= 1;
- n_left_to_next -= 1;
-
- b0 = vlib_get_buffer (vm, bi0);
-
- 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;
-
- 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))
- {
- s0 = snat_out2in_unknown_proto(sm, b0, ip0, rx_fib_index0,
- thread_index, now, vm, node);
- if (!s0)
- 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))
- {
- b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
- /*
- * Send DHCP packets to the ipv4 stack, or we won't
- * be able to use dhcp client on the outside interface
- */
- if (proto0 != SNAT_PROTOCOL_UDP
- || (udp0->dst_port
- != clib_host_to_net_u16(UDP_DST_PORT_dhcp_to_client)))
-
- 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);
- if (!s0)
- {
- next0 = SNAT_OUT2IN_NEXT_DROP;
- goto trace00;
- }
- }
- else
- {
- if (PREDICT_FALSE (value0.value == ~0ULL))
- {
- s0 = snat_out2in_lb(sm, b0, ip0, rx_fib_index0, thread_index,
- now, vm, node);
- 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 */
- s0->last_heard = now;
- s0->total_pkts++;
- s0->total_bytes += vlib_buffer_length_in_chain (vm, b0);
- /* Per-user LRU list maintenance for dynamic translation */
- if (!snat_is_session_static (s0))
- {
- clib_dlist_remove (sm->per_thread_data[thread_index].list_pool,
- s0->per_user_index);
- clib_dlist_addtail (sm->per_thread_data[thread_index].list_pool,
- s0->per_user_list_head_index,
- s0->per_user_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);
+ /* Try to match static mapping by external address and port,
+ destination address and port in packet */
+ if (snat_static_mapping_match
+ (sm, ip0->dst_address,
+ vnet_buffer (b0)->ip.reass.l4_dst_port, rx_fib_index0,
+ proto0, &sm_addr0, &sm_port0, &sm_fib_index0, 1, 0, 0, 0,
+ 0, &identity_nat0, 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 == NAT_PROTOCOL_UDP
+ && (vnet_buffer (b0)->ip.reass.l4_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;
+ }
+
+ if (PREDICT_FALSE (identity_nat0))
+ goto trace0;
+
+ /* Create session initiated by host from external network */
+ s0 = create_session_for_static_mapping (sm, b0,
+ sm_addr0, sm_port0,
+ sm_fib_index0,
+ ip0->dst_address,
+ vnet_buffer (b0)->ip.
+ reass.l4_dst_port,
+ rx_fib_index0, proto0, node,
+ thread_index, now);
+ if (!s0)
+ {
+ next0 = SNAT_OUT2IN_NEXT_DROP;
+ goto trace0;
+ }
}
+ else
+ s0 = pool_elt_at_index (tsm->sessions, value0.value);
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
- }
+ 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;
- vlib_node_increment_counter (vm, snat_out2in_node.index,
- SNAT_OUT2IN_ERROR_OUT2IN_PACKETS,
- pkts_processed);
- return frame->n_vectors;
-}
+ 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);
-VLIB_REGISTER_NODE (snat_out2in_node) = {
- .function = snat_out2in_node_fn,
- .name = "nat44-out2in",
- .vector_size = sizeof (u32),
- .format_trace = format_snat_out2in_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
+ if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP))
+ {
+ if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
+ {
+ old_port0 = vnet_buffer (b0)->ip.reass.l4_dst_port;
+ new_port0 = udp0->dst_port = s0->in2out.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);
+ }
+ vlib_increment_simple_counter (&sm->counters.slowpath.out2in.tcp,
+ thread_index, sw_if_index0, 1);
+ }
+ else
+ {
+ if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
+ {
+ old_port0 = vnet_buffer (b0)->ip.reass.l4_dst_port;
+ new_port0 = udp0->dst_port = s0->in2out.port;
+ if (PREDICT_FALSE (udp0->checksum))
+ {
+ sum0 = udp0->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 */ );
+ udp0->checksum = ip_csum_fold (sum0);
+ }
+ }
+ vlib_increment_simple_counter (&sm->counters.slowpath.out2in.udp,
+ thread_index, sw_if_index0, 1);
+ }
- .n_errors = ARRAY_LEN(snat_out2in_error_strings),
- .error_strings = snat_out2in_error_strings,
+ /* Accounting */
+ nat44_session_update_counters (s0, now,
+ vlib_buffer_length_in_chain (vm, b0),
+ thread_index);
+ /* Per-user LRU list maintenance */
+ nat44_session_update_lru (sm, s0, thread_index);
+ trace0:
- .runtime_data_bytes = sizeof (snat_runtime_t),
+ 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;
+ }
- .n_next_nodes = SNAT_OUT2IN_N_NEXT,
+ if (next0 == SNAT_OUT2IN_NEXT_DROP)
+ {
+ vlib_increment_simple_counter (&sm->counters.slowpath.out2in.drops,
+ thread_index, sw_if_index0, 1);
+ }
- /* 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_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)
-{
- 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 = vlib_get_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;
+ ip1 = vlib_buffer_get_current (b1);
+ udp1 = ip4_next_header (ip1);
+ tcp1 = (tcp_header_t *) udp1;
+ icmp1 = (icmp46_header_t *) udp1;
- from = vlib_frame_vector_args (frame);
- n_left_from = frame->n_vectors;
- next_index = node->cached_next_index;
+ 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);
- 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, 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;
- to_next += 1;
- n_left_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];
- 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))
- {
- b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
- /*
- * Send DHCP packets to the ipv4 stack, or we won't
- * be able to use dhcp client on the outside interface
- */
- if (proto0 != SNAT_PROTOCOL_UDP
- || (udp0->dst_port
- != clib_host_to_net_u16(UDP_DST_PORT_dhcp_to_client)))
-
- 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);
- 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))
- {
- b0->error = node->errors[SNAT_OUT2IN_ERROR_MAX_FRAG];
- 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 */
- s0->last_heard = now;
- s0->total_pkts++;
- s0->total_bytes += vlib_buffer_length_in_chain (vm, b0);
- /* Per-user LRU list maintenance for dynamic translation */
- if (!snat_is_session_static (s0))
- {
- clib_dlist_remove (sm->per_thread_data[thread_index].list_pool,
- s0->per_user_index);
- clib_dlist_addtail (sm->per_thread_data[thread_index].list_pool,
- s0->per_user_list_head_index,
- s0->per_user_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);
- }
-
- if (n_left_from == 0 && vec_len (fragments_to_loopback))
+ 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_nat_proto (ip1->protocol);
+
+ if (PREDICT_FALSE (proto1 == NAT_PROTOCOL_OTHER))
+ {
+ if (nat_out2in_sm_unknown_proto (sm, b1, ip1, rx_fib_index1))
{
- from = vlib_frame_vector_args (frame);
- u32 len = vec_len (fragments_to_loopback);
- if (len <= VLIB_FRAME_SIZE)
+ if (!sm->forwarding_enabled)
{
- clib_memcpy (from, fragments_to_loopback, sizeof (u32) * len);
- n_left_from = len;
- vec_reset_length (fragments_to_loopback);
+ b1->error =
+ node->errors[SNAT_OUT2IN_ERROR_UNSUPPORTED_PROTOCOL];
+ next1 = SNAT_OUT2IN_NEXT_DROP;
}
- else
+ }
+ vlib_increment_simple_counter (&sm->counters.slowpath.out2in.other,
+ thread_index, sw_if_index1, 1);
+ goto trace1;
+ }
+
+ if (PREDICT_FALSE (proto1 == NAT_PROTOCOL_ICMP))
+ {
+ next1 = icmp_out2in_slow_path
+ (sm, b1, ip1, icmp1, sw_if_index1, rx_fib_index1, node,
+ next1, now, thread_index, &s1);
+ vlib_increment_simple_counter (&sm->counters.slowpath.out2in.icmp,
+ thread_index, sw_if_index1, 1);
+ goto trace1;
+ }
+
+ init_nat_k (&kv1, ip1->dst_address,
+ vnet_buffer (b1)->ip.reass.l4_dst_port, rx_fib_index1,
+ proto1);
+
+ 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, ip1->dst_address,
+ vnet_buffer (b1)->ip.reass.l4_dst_port, proto1,
+ rx_fib_index1, &sm_addr1, &sm_port1, &sm_fib_index1, 1, 0,
+ 0, 0, 0, &identity_nat1, 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 == NAT_PROTOCOL_UDP
+ && (vnet_buffer (b1)->ip.reass.l4_dst_port ==
+ clib_host_to_net_u16 (UDP_DST_PORT_dhcp_to_client))))
{
- 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;
+ 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;
}
- }
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
- }
+ if (PREDICT_FALSE (identity_nat1))
+ goto trace1;
+
+ /* Create session initiated by host from external network */
+ s1 =
+ create_session_for_static_mapping (sm, b1, sm_addr1, sm_port1,
+ sm_fib_index1,
+ ip1->dst_address,
+ vnet_buffer (b1)->ip.
+ reass.l4_dst_port,
+ rx_fib_index1, proto1, 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);
- vlib_node_increment_counter (vm, nat44_out2in_reass_node.index,
- SNAT_OUT2IN_ERROR_OUT2IN_PACKETS,
- pkts_processed);
+ 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;
- nat_send_all_to_node (vm, fragments_to_drop, node,
- &node->errors[SNAT_OUT2IN_ERROR_DROP_FRAGMENT],
- SNAT_OUT2IN_NEXT_DROP);
+ 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);
- vec_free (fragments_to_drop);
- vec_free (fragments_to_loopback);
- return frame->n_vectors;
-}
+ if (PREDICT_TRUE (proto1 == NAT_PROTOCOL_TCP))
+ {
+ if (!vnet_buffer (b1)->ip.reass.is_non_first_fragment)
+ {
+ old_port1 = vnet_buffer (b1)->ip.reass.l4_dst_port;
+ new_port1 = udp1->dst_port = s1->in2out.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);
+ }
+ vlib_increment_simple_counter (&sm->counters.slowpath.out2in.tcp,
+ thread_index, sw_if_index1, 1);
+ }
+ else
+ {
+ if (!vnet_buffer (b1)->ip.reass.is_non_first_fragment)
+ {
+ old_port1 = vnet_buffer (b1)->ip.reass.l4_dst_port;
+ new_port1 = udp1->dst_port = s1->in2out.port;
+ if (PREDICT_FALSE (udp1->checksum))
+ {
-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,
- .type = VLIB_NODE_TYPE_INTERNAL,
+ sum1 = udp1->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 */ );
+ udp1->checksum = ip_csum_fold (sum1);
+ }
+ }
+ vlib_increment_simple_counter (&sm->counters.slowpath.out2in.udp,
+ thread_index, sw_if_index1, 1);
+ }
- .n_errors = ARRAY_LEN(snat_out2in_error_strings),
- .error_strings = snat_out2in_error_strings,
+ /* Accounting */
+ nat44_session_update_counters (s1, now,
+ vlib_buffer_length_in_chain (vm, b1),
+ thread_index);
+ /* Per-user LRU list maintenance */
+ nat44_session_update_lru (sm, s1, thread_index);
+ trace1:
- .n_next_nodes = SNAT_OUT2IN_N_NEXT,
+ 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;
+ }
- /* 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 (nat44_out2in_reass_node,
- nat44_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;
- snat_out2in_next_t next_index;
- u32 pkts_processed = 0;
- snat_main_t * sm = &snat_main;
- u32 thread_index = vlib_get_thread_index ();
+ if (next1 == SNAT_OUT2IN_NEXT_DROP)
+ {
+ vlib_increment_simple_counter (&sm->counters.slowpath.out2in.drops,
+ thread_index, sw_if_index1, 1);
+ }
- from = vlib_frame_vector_args (frame);
- n_left_from = frame->n_vectors;
- next_index = node->cached_next_index;
+ n_left_from -= 2;
+ next[0] = next0;
+ next[1] = next1;
+ next += 2;
+ }
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 = 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))
- {
- clib_warning("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))
- {
- clib_warning("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))
- {
- clib_warning("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))
- {
- clib_warning("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);
- }
-
- while (n_left_from > 0 && n_left_to_next > 0)
+ 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;
+ u32 rx_fib_index0;
+ u32 proto0;
+ snat_session_t *s0 = 0;
+ clib_bihash_kv_8_8_t kv0, value0;
+ u8 identity_nat0;
+ ip4_address_t sm_addr0;
+ u16 sm_port0;
+ u32 sm_fib_index0;
+
+ b0 = *b;
+ ++b;
+
+ 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;
+
+ 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_nat_proto (ip0->protocol);
+
+ if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER))
{
- 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 */
- 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 = 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))
- {
- clib_warning("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))
- {
- clib_warning("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);
+ 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;
+ }
+ }
+ vlib_increment_simple_counter (&sm->counters.slowpath.out2in.other,
+ thread_index, sw_if_index0, 1);
+ goto trace00;
}
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ 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 == NAT_PROTOCOL_ICMP))
+ {
+ next0 = icmp_out2in_slow_path
+ (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
+ next0, now, thread_index, &s0);
+ vlib_increment_simple_counter (&sm->counters.slowpath.out2in.icmp,
+ thread_index, sw_if_index0, 1);
+ goto trace00;
+ }
+
+ init_nat_k (&kv0, ip0->dst_address,
+ vnet_buffer (b0)->ip.reass.l4_dst_port, rx_fib_index0,
+ proto0);
+
+ 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, ip0->dst_address,
+ vnet_buffer (b0)->ip.reass.l4_dst_port, rx_fib_index0,
+ proto0, &sm_addr0, &sm_port0, &sm_fib_index0, 1, 0, 0, 0,
+ 0, &identity_nat0, 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 == NAT_PROTOCOL_UDP
+ && (vnet_buffer (b0)->ip.reass.l4_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;
+ }
+
+ if (PREDICT_FALSE (identity_nat0))
+ goto trace00;
+
+ /* Create session initiated by host from external network */
+ s0 = create_session_for_static_mapping (sm, b0,
+ sm_addr0, sm_port0,
+ sm_fib_index0,
+ ip0->dst_address,
+ vnet_buffer (b0)->ip.
+ reass.l4_dst_port,
+ rx_fib_index0, proto0, 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 == NAT_PROTOCOL_TCP))
+ {
+ if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
+ {
+ old_port0 = vnet_buffer (b0)->ip.reass.l4_dst_port;
+ new_port0 = udp0->dst_port = s0->in2out.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);
+ }
+ vlib_increment_simple_counter (&sm->counters.slowpath.out2in.tcp,
+ thread_index, sw_if_index0, 1);
+ }
+ else
+ {
+ if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
+ {
+ old_port0 = vnet_buffer (b0)->ip.reass.l4_dst_port;
+ new_port0 = udp0->dst_port = s0->in2out.port;
+ if (PREDICT_FALSE (udp0->checksum))
+ {
+ sum0 = udp0->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 */ );
+ udp0->checksum = ip_csum_fold (sum0);
+ }
+ }
+ vlib_increment_simple_counter (&sm->counters.slowpath.out2in.udp,
+ thread_index, sw_if_index0, 1);
+ }
+
+ /* Accounting */
+ nat44_session_update_counters (s0, now,
+ vlib_buffer_length_in_chain (vm, b0),
+ thread_index);
+ /* 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;
+ }
+
+ if (next0 == SNAT_OUT2IN_NEXT_DROP)
+ {
+ vlib_increment_simple_counter (&sm->counters.slowpath.out2in.drops,
+ thread_index, sw_if_index0, 1);
+ }
+
+ n_left_from--;
+ next[0] = next0;
+ next++;
}
- vlib_node_increment_counter (vm, snat_det_out2in_node.index,
- SNAT_OUT2IN_ERROR_OUT2IN_PACKETS,
- pkts_processed);
+ vlib_buffer_enqueue_to_next (vm, node, from, (u16 *) nexts,
+ frame->n_vectors);
+
return frame->n_vectors;
}
-VLIB_REGISTER_NODE (snat_det_out2in_node) = {
- .function = snat_det_out2in_node_fn,
- .name = "nat44-det-out2in",
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (snat_out2in_node) = {
+ .name = "nat44-out2in",
.vector_size = sizeof (u32),
.format_trace = format_snat_out2in_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
[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;
- }
- clib_warning("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;
- }
- clib_warning("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;
-
-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;
-}
+/* *INDENT-ON* */
-/**********************/
-/*** worker handoff ***/
-/**********************/
-static uword
-snat_out2in_worker_handoff_fn (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
+VLIB_NODE_FN (snat_out2in_fast_node) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
{
+ u32 n_left_from, *from;
snat_main_t *sm = &snat_main;
- vlib_thread_main_t *tm = vlib_get_thread_main ();
- u32 n_left_from, *from, *to_next = 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_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 = vlib_get_thread_index ();
-
- ASSERT (vec_len (sm->workers));
-
- 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,
- sm->first_worker_index + sm->num_workers - 1,
- (vlib_frame_queue_t *) (~0));
- }
from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
+ vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
+ u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
+ vlib_get_buffers (vm, from, b, n_left_from);
while (n_left_from > 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;
+ u32 proto0;
u32 rx_fib_index0;
- ip4_header_t * ip0;
- u8 do_handoff;
+ ip4_address_t sm_addr0;
+ u16 sm_port0;
+ u32 sm_fib_index0;
- bi0 = from[0];
- from += 1;
- n_left_from -= 1;
+ b0 = *b;
+ b++;
- b0 = vlib_get_buffer (vm, bi0);
+ 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);
+ 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)
- {
- 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++;
- }
+ vnet_feature_next (&next0, b0);
- if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ if (PREDICT_FALSE (ip0->ttl == 1))
{
- 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;
- }
- }
+ 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 (f)
- vlib_put_frame_to_node (vm, sm->out2in_node_index, f);
+ proto0 = ip_proto_to_nat_proto (ip0->protocol);
- if (hf)
- hf->n_vectors = VLIB_FRAME_SIZE - n_left_to_next_worker;
+ if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER))
+ goto trace00;
- /* 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])
+ if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP))
{
- 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;
+ next0 = icmp_out2in (sm, b0, ip0, icmp0, sw_if_index0,
+ rx_fib_index0, node, next0, ~0, 0, 0);
+ goto trace00;
}
- 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,
+ if (snat_static_mapping_match
+ (sm, ip0->dst_address, udp0->dst_port, rx_fib_index0, proto0,
+ &sm_addr0, &sm_port0, &sm_fib_index0, 1, 0, 0, 0, 0, 0, 0))
+ {
+ b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION];
+ goto trace00;
+ }
- .n_next_nodes = 1,
+ new_addr0 = sm_addr0.as_u32;
+ new_port0 = sm_port0;
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = sm_fib_index0;
+ old_addr0 = ip0->dst_address.as_u32;
+ ip0->dst_address.as_u32 = new_addr0;
- .next_nodes = {
- [0] = "error-drop",
- },
-};
+ 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);
-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;
+ if (PREDICT_FALSE (new_port0 != udp0->dst_port))
+ {
+ old_port0 = udp0->dst_port;
+ udp0->dst_port = new_port0;
- from = vlib_frame_vector_args (frame);
- n_left_from = frame->n_vectors;
- next_index = node->cached_next_index;
+ if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP))
+ {
+ 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 if (udp0->checksum)
+ {
+ sum0 = udp0->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 */ );
+ udp0->checksum = ip_csum_fold (sum0);
+ }
+ }
+ else
+ {
+ if (PREDICT_TRUE (proto0 == NAT_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);
+ }
+ else if (udp0->checksum)
+ {
+ sum0 = udp0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
+ ip4_header_t,
+ dst_address /* changed member */ );
+ udp0->checksum = ip_csum_fold (sum0);
+ }
+ }
- while (n_left_from > 0)
- {
- u32 n_left_to_next;
+ trace00:
- vlib_get_next_frame (vm, node, next_index,
- to_next, n_left_to_next);
+ 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;
+ }
- while (n_left_from > 0 && n_left_to_next > 0)
+ if (next0 == SNAT_OUT2IN_NEXT_DROP)
{
- 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;
-
- b0 = vlib_get_buffer (vm, bi0);
-
- 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);
-
- vnet_feature_next (sw_if_index0, &next0, b0);
-
- 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))
- {
- 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 */
- vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
- to_next, n_left_to_next,
- bi0, next0);
+ vlib_increment_simple_counter (&sm->counters.fastpath.out2in.drops,
+ vm->thread_index, sw_if_index0, 1);
}
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ n_left_from--;
+ next[0] = next0;
+ next++;
}
- vlib_node_increment_counter (vm, snat_out2in_fast_node.index,
- SNAT_OUT2IN_ERROR_OUT2IN_PACKETS,
- pkts_processed);
+ vlib_buffer_enqueue_to_next (vm, node, from, (u16 *) nexts,
+ frame->n_vectors);
+
return frame->n_vectors;
}
+/* *INDENT-OFF* */
VLIB_REGISTER_NODE (snat_out2in_fast_node) = {
- .function = snat_out2in_fast_node_fn,
.name = "nat44-out2in-fast",
.vector_size = sizeof (u32),
.format_trace = format_snat_out2in_fast_trace,
[SNAT_OUT2IN_NEXT_LOOKUP] = "ip4-lookup",
[SNAT_OUT2IN_NEXT_DROP] = "error-drop",
[SNAT_OUT2IN_NEXT_ICMP_ERROR] = "ip4-icmp-error",
- [SNAT_OUT2IN_NEXT_REASS] = "nat44-out2in-reass",
},
};
-VLIB_NODE_FUNCTION_MULTIARCH (snat_out2in_fast_node, snat_out2in_fast_node_fn);
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
Code Review / vpp.git / blobdiff