* See the License for the specific language governing permissions and
* limitations under the License.
*/
+/**
+ * @file
+ * @brief NAT44 inside to outside network translation
+ */
#include <vlib/vlib.h>
#include <vnet/vnet.h>
#include <vnet/pg/pg.h>
-#include <vnet/handoff.h>
#include <vnet/ip/ip.h>
#include <vnet/ethernet/ethernet.h>
#include <vnet/fib/ip4_fib.h>
#include <nat/nat.h>
#include <nat/nat_ipfix_logging.h>
-#include <nat/nat_det.h>
+#include <nat/nat_reass.h>
+#include <nat/nat_inlines.h>
+#include <nat/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;
u32 is_slow_path;
} snat_in2out_trace_t;
-typedef struct {
- u32 next_worker_index;
- u8 do_handoff;
-} snat_in2out_worker_handoff_trace_t;
-
/* packet trace format function */
-static u8 * format_snat_in2out_trace (u8 * s, va_list * args)
+static u8 *
+format_snat_in2out_trace (u8 * s, va_list * args)
{
CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
- snat_in2out_trace_t * t = va_arg (*args, snat_in2out_trace_t *);
- char * tag;
+ snat_in2out_trace_t *t = va_arg (*args, snat_in2out_trace_t *);
+ char *tag;
tag = t->is_slow_path ? "NAT44_IN2OUT_SLOW_PATH" : "NAT44_IN2OUT_FAST_PATH";
s = format (s, "%s: sw_if_index %d, next index %d, session %d", tag,
- t->sw_if_index, t->next_index, t->session_index);
+ t->sw_if_index, t->next_index, t->session_index);
return s;
}
-static u8 * format_snat_in2out_fast_trace (u8 * s, va_list * args)
+static u8 *
+format_snat_in2out_fast_trace (u8 * s, va_list * args)
{
CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
- snat_in2out_trace_t * t = va_arg (*args, snat_in2out_trace_t *);
+ snat_in2out_trace_t *t = va_arg (*args, snat_in2out_trace_t *);
s = format (s, "NAT44_IN2OUT_FAST: sw_if_index %d, next index %d",
- t->sw_if_index, t->next_index);
-
- return s;
-}
-
-static u8 * format_snat_in2out_worker_handoff_trace (u8 * s, va_list * args)
-{
- CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
- CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
- snat_in2out_worker_handoff_trace_t * t =
- va_arg (*args, snat_in2out_worker_handoff_trace_t *);
- char * m;
-
- m = t->do_handoff ? "next worker" : "same worker";
- s = format (s, "NAT44_IN2OUT_WORKER_HANDOFF: %s %d", m, t->next_worker_index);
+ t->sw_if_index, t->next_index);
return s;
}
-vlib_node_registration_t snat_in2out_node;
-vlib_node_registration_t snat_in2out_slowpath_node;
-vlib_node_registration_t snat_in2out_fast_node;
-vlib_node_registration_t snat_in2out_worker_handoff_node;
-vlib_node_registration_t snat_det_in2out_node;
-vlib_node_registration_t snat_in2out_output_node;
-vlib_node_registration_t snat_in2out_output_slowpath_node;
-vlib_node_registration_t snat_in2out_output_worker_handoff_node;
-vlib_node_registration_t snat_hairpin_dst_node;
-vlib_node_registration_t snat_hairpin_src_node;
-
-
#define foreach_snat_in2out_error \
-_(UNSUPPORTED_PROTOCOL, "Unsupported protocol") \
-_(IN2OUT_PACKETS, "Good in2out packets processed") \
-_(OUT_OF_PORTS, "Out of ports") \
-_(BAD_OUTSIDE_FIB, "Outside VRF ID not found") \
+_(UNSUPPORTED_PROTOCOL, "unsupported protocol") \
+_(IN2OUT_PACKETS, "good in2out packets processed") \
+_(OUT_OF_PORTS, "out of ports") \
+_(BAD_OUTSIDE_FIB, "outside VRF ID not found") \
_(BAD_ICMP_TYPE, "unsupported ICMP type") \
-_(NO_TRANSLATION, "No translation")
-
-typedef enum {
+_(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")\
+_(TCP_PACKETS, "TCP packets") \
+_(UDP_PACKETS, "UDP packets") \
+_(ICMP_PACKETS, "ICMP packets") \
+_(OTHER_PACKETS, "other protocol packets") \
+_(FRAGMENTS, "fragments") \
+_(CACHED_FRAGMENTS, "cached fragments") \
+_(PROCESSED_FRAGMENTS, "processed fragments")
+
+typedef enum
+{
#define _(sym,str) SNAT_IN2OUT_ERROR_##sym,
foreach_snat_in2out_error
#undef _
- SNAT_IN2OUT_N_ERROR,
+ SNAT_IN2OUT_N_ERROR,
} snat_in2out_error_t;
-static char * snat_in2out_error_strings[] = {
+static char *snat_in2out_error_strings[] = {
#define _(sym,string) string,
foreach_snat_in2out_error
#undef _
};
-typedef enum {
+typedef enum
+{
SNAT_IN2OUT_NEXT_LOOKUP,
SNAT_IN2OUT_NEXT_DROP,
SNAT_IN2OUT_NEXT_ICMP_ERROR,
SNAT_IN2OUT_NEXT_SLOW_PATH,
+ SNAT_IN2OUT_NEXT_REASS,
SNAT_IN2OUT_N_NEXT,
} snat_in2out_next_t;
-typedef enum {
- SNAT_HAIRPIN_SRC_NEXT_DROP,
- SNAT_HAIRPIN_SRC_NEXT_SNAT_IN2OUT,
- SNAT_HAIRPIN_SRC_NEXT_SNAT_IN2OUT_WH,
- SNAT_HAIRPIN_SRC_NEXT_INTERFACE_OUTPUT,
- SNAT_HAIRPIN_SRC_N_NEXT,
-} snat_hairpin_next_t;
-
-/**
- * @brief Check if packet should be translated
- *
- * Packets aimed at outside interface and external addresss with active session
- * should be translated.
- *
- * @param sm NAT main
- * @param rt NAT runtime data
- * @param sw_if_index0 index of the inside interface
- * @param ip0 IPv4 header
- * @param proto0 NAT protocol
- * @param rx_fib_index0 RX FIB index
- *
- * @returns 0 if packet should be translated otherwise 1
- */
-static inline int
-snat_not_translate_fast (snat_main_t * sm, vlib_node_runtime_t *node,
- u32 sw_if_index0, ip4_header_t * ip0, u32 proto0,
- u32 rx_fib_index0)
-{
- fib_node_index_t fei = FIB_NODE_INDEX_INVALID;
- fib_prefix_t pfx = {
- .fp_proto = FIB_PROTOCOL_IP4,
- .fp_len = 32,
- .fp_addr = {
- .ip4.as_u32 = ip0->dst_address.as_u32,
- },
- };
-
- /* Don't NAT packet aimed at the intfc address */
- if (PREDICT_FALSE(is_interface_addr(sm, node, sw_if_index0,
- ip0->dst_address.as_u32)))
- return 1;
-
- fei = fib_table_lookup (rx_fib_index0, &pfx);
- if (FIB_NODE_INDEX_INVALID != fei)
- {
- u32 sw_if_index = fib_entry_get_resolving_interface (fei);
- if (sw_if_index == ~0)
- {
- fei = fib_table_lookup (sm->outside_fib_index, &pfx);
- if (FIB_NODE_INDEX_INVALID != fei)
- sw_if_index = fib_entry_get_resolving_interface (fei);
- }
- snat_interface_t *i;
- pool_foreach (i, sm->interfaces,
- ({
- /* NAT packet aimed at outside interface */
- if ((i->is_inside == 0) && (sw_if_index == i->sw_if_index))
- return 0;
- }));
- }
-
- return 1;
-}
-
static inline int
-snat_not_translate (snat_main_t * sm, vlib_node_runtime_t *node,
- u32 sw_if_index0, ip4_header_t * ip0, u32 proto0,
- u32 rx_fib_index0)
+snat_not_translate (snat_main_t * sm, vlib_node_runtime_t * node,
+ u32 sw_if_index0, ip4_header_t * ip0, u32 proto0,
+ u32 rx_fib_index0, u32 thread_index)
{
- udp_header_t * udp0 = ip4_next_header (ip0);
+ udp_header_t *udp0 = ip4_next_header (ip0);
snat_session_key_t key0, sm0;
clib_bihash_kv_8_8_t kv0, value0;
/* NAT packet aimed at external address if */
/* has active sessions */
- if (clib_bihash_search_8_8 (&sm->out2in, &kv0, &value0))
+ if (clib_bihash_search_8_8 (&sm->per_thread_data[thread_index].out2in, &kv0,
+ &value0))
{
/* or is static mappings */
- if (!snat_static_mapping_match(sm, key0, &sm0, 1, 0))
- return 0;
+ if (!snat_static_mapping_match (sm, key0, &sm0, 1, 0, 0, 0, 0, 0))
+ return 0;
}
else
return 0;
- return snat_not_translate_fast(sm, node, sw_if_index0, ip0, proto0,
- rx_fib_index0);
+ if (sm->forwarding_enabled)
+ return 1;
+
+ return snat_not_translate_fast (sm, node, sw_if_index0, ip0, proto0,
+ rx_fib_index0);
}
-static u32 slow_path (snat_main_t *sm, vlib_buffer_t *b0,
- ip4_header_t * ip0,
- u32 rx_fib_index0,
- snat_session_key_t * key0,
- snat_session_t ** sessionp,
- vlib_node_runtime_t * node,
- u32 next0,
- u32 thread_index)
+static inline int
+nat_not_translate_output_feature (snat_main_t * sm, ip4_header_t * ip0,
+ u32 proto0, u16 src_port, u16 dst_port,
+ u32 thread_index, u32 sw_if_index)
{
- snat_user_t *u;
- snat_user_key_t user_key;
- snat_session_t *s;
+ snat_session_key_t key0;
clib_bihash_kv_8_8_t kv0, value0;
- u32 oldest_per_user_translation_list_index;
- dlist_elt_t * oldest_per_user_translation_list_elt;
- dlist_elt_t * per_user_translation_list_elt;
- dlist_elt_t * per_user_list_head_elt;
- u32 session_index;
- snat_session_key_t key1;
- u32 address_index = ~0;
- u32 outside_fib_index;
- uword * p;
- snat_worker_key_t worker_by_out_key;
+ snat_interface_t *i;
+
+ /* src NAT check */
+ key0.addr = ip0->src_address;
+ key0.port = src_port;
+ key0.protocol = proto0;
+ key0.fib_index = ip4_fib_table_get_index_for_sw_if_index (sw_if_index);
+ kv0.key = key0.as_u64;
+
+ if (!clib_bihash_search_8_8
+ (&sm->per_thread_data[thread_index].out2in, &kv0, &value0))
+ return 1;
- p = hash_get (sm->ip4_main->fib_index_by_table_id, sm->outside_vrf_id);
- if (! p)
+ /* dst NAT check */
+ key0.addr = ip0->dst_address;
+ key0.port = dst_port;
+ key0.protocol = proto0;
+ kv0.key = key0.as_u64;
+ if (!clib_bihash_search_8_8
+ (&sm->per_thread_data[thread_index].in2out, &kv0, &value0))
{
- b0->error = node->errors[SNAT_IN2OUT_ERROR_BAD_OUTSIDE_FIB];
- return SNAT_IN2OUT_NEXT_DROP;
+ /* hairpinning */
+ /* *INDENT-OFF* */
+ pool_foreach (i, sm->output_feature_interfaces,
+ ({
+ if ((nat_interface_is_inside(i)) && (sw_if_index == i->sw_if_index))
+ return 0;
+ }));
+ /* *INDENT-ON* */
+ return 1;
}
- outside_fib_index = p[0];
- key1.protocol = key0->protocol;
- user_key.addr = ip0->src_address;
- user_key.fib_index = rx_fib_index0;
- kv0.key = user_key.as_u64;
+ return 0;
+}
- /* Ever heard of the "user" = src ip4 address before? */
- if (clib_bihash_search_8_8 (&sm->user_hash, &kv0, &value0))
+#ifndef CLIB_MARCH_VARIANT
+int
+nat44_i2o_is_idle_session_cb (clib_bihash_kv_8_8_t * kv, void *arg)
+{
+ snat_main_t *sm = &snat_main;
+ nat44_is_idle_session_ctx_t *ctx = arg;
+ snat_session_t *s;
+ u64 sess_timeout_time;
+ snat_main_per_thread_data_t *tsm = vec_elt_at_index (sm->per_thread_data,
+ ctx->thread_index);
+ 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)
{
- /* no, make a new one */
- pool_get (sm->per_thread_data[thread_index].users, u);
- memset (u, 0, sizeof (*u));
- u->addr = ip0->src_address;
- u->fib_index = rx_fib_index0;
-
- pool_get (sm->per_thread_data[thread_index].list_pool, per_user_list_head_elt);
+ s_kv.key = s->out2in.as_u64;
+ if (clib_bihash_add_del_8_8 (&tsm->out2in, &s_kv, 0))
+ nat_log_warn ("out2in key del failed");
+
+ snat_ipfix_logging_nat44_ses_delete (ctx->thread_index,
+ s->in2out.addr.as_u32,
+ s->out2in.addr.as_u32,
+ s->in2out.protocol,
+ 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->in2out.protocol);
+
+ nat_ha_sdel (&s->out2in.addr, s->out2in.port, &s->ext_host_addr,
+ s->ext_host_port, s->out2in.protocol, 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);
+
+ nat44_delete_session (sm, s, ctx->thread_index);
+ return 1;
+ }
- u->sessions_per_user_list_head_index = per_user_list_head_elt -
- sm->per_thread_data[thread_index].list_pool;
+ return 0;
+}
+#endif
+
+static u32
+slow_path (snat_main_t * sm, vlib_buffer_t * b0,
+ ip4_header_t * ip0,
+ u32 rx_fib_index0,
+ snat_session_key_t * key0,
+ snat_session_t ** sessionp,
+ vlib_node_runtime_t * node, u32 next0, u32 thread_index, f64 now)
+{
+ snat_user_t *u;
+ snat_session_t *s = 0;
+ clib_bihash_kv_8_8_t kv0;
+ snat_session_key_t key1;
+ udp_header_t *udp0 = ip4_next_header (ip0);
+ u8 is_sm = 0;
+ nat_outside_fib_t *outside_fib;
+ fib_node_index_t fei = FIB_NODE_INDEX_INVALID;
+ u8 identity_nat;
+ fib_prefix_t pfx = {
+ .fp_proto = FIB_PROTOCOL_IP4,
+ .fp_len = 32,
+ .fp_addr = {
+ .ip4.as_u32 = ip0->dst_address.as_u32,
+ },
+ };
+ nat44_is_idle_session_ctx_t ctx0;
- clib_dlist_init (sm->per_thread_data[thread_index].list_pool,
- u->sessions_per_user_list_head_index);
+ if (PREDICT_FALSE (maximum_sessions_exceeded (sm, thread_index)))
+ {
+ b0->error = node->errors[SNAT_IN2OUT_ERROR_MAX_SESSIONS_EXCEEDED];
+ nat_ipfix_logging_max_sessions (thread_index, sm->max_translations);
+ nat_log_notice ("maximum sessions exceeded");
+ return SNAT_IN2OUT_NEXT_DROP;
+ }
- kv0.value = u - sm->per_thread_data[thread_index].users;
+ key1.protocol = key0->protocol;
- /* add user */
- clib_bihash_add_del_8_8 (&sm->user_hash, &kv0, 1 /* is_add */);
+ /* First try to match static mapping by local address and port */
+ if (snat_static_mapping_match
+ (sm, *key0, &key1, 0, 0, 0, 0, 0, &identity_nat))
+ {
+ /* Try to create dynamic translation */
+ if (snat_alloc_outside_address_and_port (sm->addresses, rx_fib_index0,
+ thread_index, &key1,
+ sm->port_per_thread,
+ sm->per_thread_data
+ [thread_index].snat_thread_index))
+ {
+ b0->error = node->errors[SNAT_IN2OUT_ERROR_OUT_OF_PORTS];
+ return SNAT_IN2OUT_NEXT_DROP;
+ }
}
else
{
- u = pool_elt_at_index (sm->per_thread_data[thread_index].users,
- value0.value);
+ if (PREDICT_FALSE (identity_nat))
+ {
+ *sessionp = s;
+ return next0;
+ }
+
+ is_sm = 1;
}
- /* Over quota? Recycle the least recently used dynamic translation */
- if (u->nsessions >= sm->max_translations_per_user)
+ u = nat_user_get_or_create (sm, &ip0->src_address, rx_fib_index0,
+ thread_index);
+ if (!u)
{
- /* Remove the oldest dynamic translation */
- do {
- oldest_per_user_translation_list_index =
- clib_dlist_remove_head (sm->per_thread_data[thread_index].list_pool,
- u->sessions_per_user_list_head_index);
-
- ASSERT (oldest_per_user_translation_list_index != ~0);
-
- /* add it back to the end of the LRU list */
- clib_dlist_addtail (sm->per_thread_data[thread_index].list_pool,
- u->sessions_per_user_list_head_index,
- oldest_per_user_translation_list_index);
- /* Get the list element */
- oldest_per_user_translation_list_elt =
- pool_elt_at_index (sm->per_thread_data[thread_index].list_pool,
- oldest_per_user_translation_list_index);
-
- /* Get the session index from the list element */
- session_index = oldest_per_user_translation_list_elt->value;
-
- /* Get the session */
- s = pool_elt_at_index (sm->per_thread_data[thread_index].sessions,
- session_index);
- } while (snat_is_session_static (s));
-
- if (snat_is_unk_proto_session (s))
- {
- clib_bihash_kv_16_8_t up_kv;
- snat_unk_proto_ses_key_t key;
-
- /* Remove from lookup tables */
- key.l_addr = s->in2out.addr;
- key.r_addr = s->ext_host_addr;
- key.fib_index = s->in2out.fib_index;
- key.proto = s->in2out.port;
- up_kv.key[0] = key.as_u64[0];
- up_kv.key[1] = key.as_u64[1];
- if (clib_bihash_add_del_16_8 (&sm->in2out_unk_proto, &up_kv, 0))
- clib_warning ("in2out key del failed");
-
- key.l_addr = s->out2in.addr;
- key.fib_index = s->out2in.fib_index;
- up_kv.key[0] = key.as_u64[0];
- up_kv.key[1] = key.as_u64[1];
- if (clib_bihash_add_del_16_8 (&sm->out2in_unk_proto, &up_kv, 0))
- clib_warning ("out2in key del failed");
- }
- else
- {
- /* Remove in2out, out2in keys */
- kv0.key = s->in2out.as_u64;
- if (clib_bihash_add_del_8_8 (&sm->in2out, &kv0, 0 /* is_add */))
- clib_warning ("in2out key delete failed");
- kv0.key = s->out2in.as_u64;
- if (clib_bihash_add_del_8_8 (&sm->out2in, &kv0, 0 /* is_add */))
- clib_warning ("out2in key delete failed");
-
- /* log NAT event */
- snat_ipfix_logging_nat44_ses_delete(s->in2out.addr.as_u32,
- s->out2in.addr.as_u32,
- s->in2out.protocol,
- s->in2out.port,
- s->out2in.port,
- s->in2out.fib_index);
-
- snat_free_outside_address_and_port
- (sm, &s->out2in, s->outside_address_index);
- }
- s->outside_address_index = ~0;
-
- if (snat_alloc_outside_address_and_port (sm, rx_fib_index0, thread_index,
- &key1, &address_index))
- {
- ASSERT(0);
-
- b0->error = node->errors[SNAT_IN2OUT_ERROR_OUT_OF_PORTS];
- return SNAT_IN2OUT_NEXT_DROP;
- }
- s->outside_address_index = address_index;
+ nat_log_warn ("create NAT user failed");
+ return SNAT_IN2OUT_NEXT_DROP;
}
- else
+
+ s = nat_session_alloc_or_recycle (sm, u, thread_index, now);
+ if (!s)
{
- u8 static_mapping = 1;
+ nat44_delete_user_with_no_session (sm, u, thread_index);
+ nat_log_warn ("create NAT session failed");
+ return SNAT_IN2OUT_NEXT_DROP;
+ }
- /* First try to match static mapping by local address and port */
- if (snat_static_mapping_match (sm, *key0, &key1, 0, 0))
+ if (is_sm)
+ s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING;
+ user_session_increment (sm, u, is_sm);
+ s->in2out = *key0;
+ s->out2in = key1;
+ s->out2in.protocol = key0->protocol;
+ s->out2in.fib_index = sm->outside_fib_index;
+ switch (vec_len (sm->outside_fibs))
+ {
+ case 0:
+ s->out2in.fib_index = sm->outside_fib_index;
+ break;
+ case 1:
+ s->out2in.fib_index = sm->outside_fibs[0].fib_index;
+ break;
+ default:
+ /* *INDENT-OFF* */
+ vec_foreach (outside_fib, sm->outside_fibs)
{
- static_mapping = 0;
- /* Try to create dynamic translation */
- if (snat_alloc_outside_address_and_port (sm, rx_fib_index0,
- thread_index, &key1,
- &address_index))
+ fei = fib_table_lookup (outside_fib->fib_index, &pfx);
+ if (FIB_NODE_INDEX_INVALID != fei)
{
- b0->error = node->errors[SNAT_IN2OUT_ERROR_OUT_OF_PORTS];
- return SNAT_IN2OUT_NEXT_DROP;
+ if (fib_entry_get_resolving_interface (fei) != ~0)
+ {
+ s->out2in.fib_index = outside_fib->fib_index;
+ break;
+ }
}
}
-
- /* Create a new session */
- pool_get (sm->per_thread_data[thread_index].sessions, s);
- memset (s, 0, sizeof (*s));
-
- s->outside_address_index = address_index;
-
- if (static_mapping)
- {
- u->nstaticsessions++;
- s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING;
- }
- else
- {
- u->nsessions++;
- }
-
- /* 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 = *key0;
- s->out2in = key1;
- s->out2in.protocol = key0->protocol;
- s->out2in.fib_index = outside_fib_index;
+ /* *INDENT-ON* */
+ break;
+ }
s->ext_host_addr.as_u32 = ip0->dst_address.as_u32;
+ s->ext_host_port = udp0->dst_port;
*sessionp = s;
/* Add to translation hashes */
+ ctx0.now = now;
+ ctx0.thread_index = thread_index;
kv0.key = s->in2out.as_u64;
kv0.value = s - sm->per_thread_data[thread_index].sessions;
- if (clib_bihash_add_del_8_8 (&sm->in2out, &kv0, 1 /* is_add */))
- clib_warning ("in2out key add failed");
+ if (clib_bihash_add_or_overwrite_stale_8_8
+ (&sm->per_thread_data[thread_index].in2out, &kv0,
+ nat44_i2o_is_idle_session_cb, &ctx0))
+ nat_log_notice ("in2out key add failed");
kv0.key = s->out2in.as_u64;
kv0.value = s - sm->per_thread_data[thread_index].sessions;
- if (clib_bihash_add_del_8_8 (&sm->out2in, &kv0, 1 /* is_add */))
- clib_warning ("out2in key add failed");
-
- /* Add to translated packets worker lookup */
- worker_by_out_key.addr = s->out2in.addr;
- worker_by_out_key.port = s->out2in.port;
- worker_by_out_key.fib_index = s->out2in.fib_index;
- kv0.key = worker_by_out_key.as_u64;
- kv0.value = thread_index;
- clib_bihash_add_del_8_8 (&sm->worker_by_out, &kv0, 1);
+ if (clib_bihash_add_or_overwrite_stale_8_8
+ (&sm->per_thread_data[thread_index].out2in, &kv0,
+ nat44_o2i_is_idle_session_cb, &ctx0))
+ nat_log_notice ("out2in key add failed");
/* log NAT event */
- snat_ipfix_logging_nat44_ses_create(s->in2out.addr.as_u32,
- s->out2in.addr.as_u32,
- s->in2out.protocol,
- s->in2out.port,
- s->out2in.port,
- s->in2out.fib_index);
+ snat_ipfix_logging_nat44_ses_create (thread_index,
+ s->in2out.addr.as_u32,
+ s->out2in.addr.as_u32,
+ s->in2out.protocol,
+ 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->in2out.protocol);
+
+ 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->in2out.protocol, s->in2out.fib_index, s->flags,
+ thread_index, 0);
+
return next0;
}
+#ifndef CLIB_MARCH_VARIANT
static_always_inline
-snat_in2out_error_t icmp_get_key(ip4_header_t *ip0,
- snat_session_key_t *p_key0)
+ snat_in2out_error_t icmp_get_key (ip4_header_t * ip0,
+ snat_session_key_t * p_key0)
{
icmp46_header_t *icmp0;
snat_session_key_t key0;
icmp46_header_t *inner_icmp0;
icmp0 = (icmp46_header_t *) ip4_next_header (ip0);
- echo0 = (icmp_echo_header_t *)(icmp0+1);
+ echo0 = (icmp_echo_header_t *) (icmp0 + 1);
if (!icmp_is_error_message (icmp0))
{
}
else
{
- inner_ip0 = (ip4_header_t *)(echo0+1);
+ inner_ip0 = (ip4_header_t *) (echo0 + 1);
l4_header = ip4_next_header (inner_ip0);
key0.protocol = ip_proto_to_snat_proto (inner_ip0->protocol);
key0.addr = inner_ip0->dst_address;
switch (key0.protocol)
- {
- case SNAT_PROTOCOL_ICMP:
- inner_icmp0 = (icmp46_header_t*)l4_header;
- inner_echo0 = (icmp_echo_header_t *)(inner_icmp0+1);
- key0.port = inner_echo0->identifier;
- break;
- case SNAT_PROTOCOL_UDP:
- case SNAT_PROTOCOL_TCP:
- key0.port = ((tcp_udp_header_t*)l4_header)->dst_port;
- break;
- default:
- return SNAT_IN2OUT_ERROR_UNSUPPORTED_PROTOCOL;
- }
+ {
+ case SNAT_PROTOCOL_ICMP:
+ inner_icmp0 = (icmp46_header_t *) l4_header;
+ inner_echo0 = (icmp_echo_header_t *) (inner_icmp0 + 1);
+ key0.port = inner_echo0->identifier;
+ break;
+ case SNAT_PROTOCOL_UDP:
+ case SNAT_PROTOCOL_TCP:
+ key0.port = ((tcp_udp_header_t *) l4_header)->dst_port;
+ break;
+ default:
+ return SNAT_IN2OUT_ERROR_UNSUPPORTED_PROTOCOL;
+ }
}
*p_key0 = key0;
- return -1; /* success */
+ return -1; /* success */
}
/**
* @param d optional parameter
* @param e optional parameter
*/
-u32 icmp_match_in2out_slow(snat_main_t *sm, vlib_node_runtime_t *node,
- u32 thread_index, vlib_buffer_t *b0, u8 *p_proto,
- snat_session_key_t *p_value,
- u8 *p_dont_translate, void *d, void *e)
+u32
+icmp_match_in2out_slow (snat_main_t * sm, vlib_node_runtime_t * node,
+ u32 thread_index, vlib_buffer_t * b0,
+ ip4_header_t * ip0, u8 * p_proto,
+ snat_session_key_t * p_value,
+ u8 * p_dont_translate, void *d, void *e)
{
- ip4_header_t *ip0;
icmp46_header_t *icmp0;
u32 sw_if_index0;
u32 rx_fib_index0;
clib_bihash_kv_8_8_t kv0, value0;
u32 next0 = ~0;
int err;
- u32 iph_offset0 = 0;
- if (PREDICT_FALSE(vnet_buffer(b0)->sw_if_index[VLIB_TX] != ~0))
- {
- iph_offset0 = vnet_buffer (b0)->ip.save_rewrite_length;
- }
- ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) + iph_offset0);
icmp0 = (icmp46_header_t *) ip4_next_header (ip0);
- sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
rx_fib_index0 = ip4_fib_table_get_index_for_sw_if_index (sw_if_index0);
err = icmp_get_key (ip0, &key0);
kv0.key = key0.as_u64;
- if (clib_bihash_search_8_8 (&sm->in2out, &kv0, &value0))
+ if (clib_bihash_search_8_8 (&sm->per_thread_data[thread_index].in2out, &kv0,
+ &value0))
{
- if (PREDICT_FALSE(snat_not_translate(sm, node, sw_if_index0, ip0,
- IP_PROTOCOL_ICMP, rx_fib_index0) &&
- vnet_buffer(b0)->sw_if_index[VLIB_TX] == ~0))
- {
- dont_translate = 1;
- goto out;
- }
+ if (vnet_buffer (b0)->sw_if_index[VLIB_TX] != ~0)
+ {
+ if (PREDICT_FALSE (nat_not_translate_output_feature (sm, ip0,
+ key0.protocol,
+ key0.port,
+ key0.port,
+ thread_index,
+ sw_if_index0)))
+ {
+ dont_translate = 1;
+ goto out;
+ }
+ }
+ else
+ {
+ if (PREDICT_FALSE (snat_not_translate (sm, node, sw_if_index0,
+ ip0, SNAT_PROTOCOL_ICMP,
+ rx_fib_index0,
+ thread_index)))
+ {
+ dont_translate = 1;
+ goto out;
+ }
+ }
- if (PREDICT_FALSE(icmp_is_error_message (icmp0)))
- {
- b0->error = node->errors[SNAT_IN2OUT_ERROR_BAD_ICMP_TYPE];
- next0 = SNAT_IN2OUT_NEXT_DROP;
- goto out;
- }
+ if (PREDICT_FALSE (icmp_is_error_message (icmp0)))
+ {
+ b0->error = node->errors[SNAT_IN2OUT_ERROR_BAD_ICMP_TYPE];
+ next0 = SNAT_IN2OUT_NEXT_DROP;
+ goto out;
+ }
- next0 = slow_path (sm, b0, ip0, rx_fib_index0, &key0,
- &s0, node, next0, thread_index);
+ next0 = slow_path (sm, b0, ip0, rx_fib_index0, &key0, &s0, node, next0,
+ thread_index, vlib_time_now (sm->vlib_main));
if (PREDICT_FALSE (next0 == SNAT_IN2OUT_NEXT_DROP))
- goto out;
+ goto out;
+
+ if (!s0)
+ {
+ dont_translate = 1;
+ goto out;
+ }
}
else
{
- if (PREDICT_FALSE(icmp0->type != ICMP4_echo_request &&
- icmp0->type != ICMP4_echo_reply &&
- !icmp_is_error_message (icmp0)))
- {
- b0->error = node->errors[SNAT_IN2OUT_ERROR_BAD_ICMP_TYPE];
- next0 = SNAT_IN2OUT_NEXT_DROP;
- goto out;
- }
+ if (PREDICT_FALSE (icmp0->type != ICMP4_echo_request &&
+ icmp0->type != ICMP4_echo_reply &&
+ !icmp_is_error_message (icmp0)))
+ {
+ b0->error = node->errors[SNAT_IN2OUT_ERROR_BAD_ICMP_TYPE];
+ next0 = SNAT_IN2OUT_NEXT_DROP;
+ goto out;
+ }
s0 = pool_elt_at_index (sm->per_thread_data[thread_index].sessions,
- value0.value);
+ value0.value);
}
out:
*p_value = s0->out2in;
*p_dont_translate = dont_translate;
if (d)
- *(snat_session_t**)d = s0;
+ *(snat_session_t **) d = s0;
return next0;
}
+#endif
+#ifndef CLIB_MARCH_VARIANT
/**
* Get address and port values to be used for ICMP packet translation
*
* @param d optional parameter
* @param e optional parameter
*/
-u32 icmp_match_in2out_fast(snat_main_t *sm, vlib_node_runtime_t *node,
- u32 thread_index, vlib_buffer_t *b0, u8 *p_proto,
- snat_session_key_t *p_value,
- u8 *p_dont_translate, void *d, void *e)
+u32
+icmp_match_in2out_fast (snat_main_t * sm, vlib_node_runtime_t * node,
+ u32 thread_index, vlib_buffer_t * b0,
+ ip4_header_t * ip0, u8 * p_proto,
+ snat_session_key_t * p_value,
+ u8 * p_dont_translate, void *d, void *e)
{
- ip4_header_t *ip0;
icmp46_header_t *icmp0;
u32 sw_if_index0;
u32 rx_fib_index0;
u32 next0 = ~0;
int err;
- ip0 = vlib_buffer_get_current (b0);
icmp0 = (icmp46_header_t *) ip4_next_header (ip0);
- sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
rx_fib_index0 = ip4_fib_table_get_index_for_sw_if_index (sw_if_index0);
err = icmp_get_key (ip0, &key0);
}
key0.fib_index = rx_fib_index0;
- if (snat_static_mapping_match(sm, key0, &sm0, 0, &is_addr_only))
+ if (snat_static_mapping_match
+ (sm, key0, &sm0, 0, &is_addr_only, 0, 0, 0, 0))
{
- if (PREDICT_FALSE(snat_not_translate_fast(sm, node, sw_if_index0, ip0,
- IP_PROTOCOL_ICMP, rx_fib_index0)))
- {
- dont_translate = 1;
- goto out;
- }
+ if (PREDICT_FALSE (snat_not_translate_fast (sm, node, sw_if_index0, ip0,
+ IP_PROTOCOL_ICMP,
+ rx_fib_index0)))
+ {
+ dont_translate = 1;
+ goto out;
+ }
if (icmp_is_error_message (icmp0))
- {
- next0 = SNAT_IN2OUT_NEXT_DROP;
- goto out;
- }
+ {
+ next0 = SNAT_IN2OUT_NEXT_DROP;
+ goto out;
+ }
b0->error = node->errors[SNAT_IN2OUT_ERROR_NO_TRANSLATION];
next0 = SNAT_IN2OUT_NEXT_DROP;
goto out;
}
- if (PREDICT_FALSE(icmp0->type != ICMP4_echo_request &&
- (icmp0->type != ICMP4_echo_reply || !is_addr_only) &&
- !icmp_is_error_message (icmp0)))
+ if (PREDICT_FALSE (icmp0->type != ICMP4_echo_request &&
+ (icmp0->type != ICMP4_echo_reply || !is_addr_only) &&
+ !icmp_is_error_message (icmp0)))
{
b0->error = node->errors[SNAT_IN2OUT_ERROR_BAD_ICMP_TYPE];
next0 = SNAT_IN2OUT_NEXT_DROP;
*p_dont_translate = dont_translate;
return next0;
}
-
-static inline u32 icmp_in2out (snat_main_t *sm,
- vlib_buffer_t * b0,
- ip4_header_t * ip0,
- icmp46_header_t * icmp0,
- u32 sw_if_index0,
- u32 rx_fib_index0,
- vlib_node_runtime_t * node,
- u32 next0,
- u32 thread_index,
- void *d,
- void *e)
+#endif
+
+#ifndef CLIB_MARCH_VARIANT
+u32
+icmp_in2out (snat_main_t * sm,
+ vlib_buffer_t * b0,
+ ip4_header_t * ip0,
+ icmp46_header_t * icmp0,
+ u32 sw_if_index0,
+ u32 rx_fib_index0,
+ vlib_node_runtime_t * node,
+ u32 next0, u32 thread_index, void *d, void *e)
{
snat_session_key_t sm0;
u8 protocol;
u8 dont_translate;
u32 new_addr0, old_addr0;
u16 old_id0, new_id0;
+ u16 old_checksum0, new_checksum0;
ip_csum_t sum0;
u16 checksum0;
u32 next0_tmp;
- echo0 = (icmp_echo_header_t *)(icmp0+1);
+ echo0 = (icmp_echo_header_t *) (icmp0 + 1);
- next0_tmp = sm->icmp_match_in2out_cb(sm, node, thread_index, b0,
- &protocol, &sm0, &dont_translate, d, e);
+ next0_tmp = sm->icmp_match_in2out_cb (sm, node, thread_index, b0, ip0,
+ &protocol, &sm0, &dont_translate, d,
+ e);
if (next0_tmp != ~0)
next0 = next0_tmp;
if (next0 == SNAT_IN2OUT_NEXT_DROP || dont_translate)
goto out;
- sum0 = ip_incremental_checksum (0, icmp0,
- ntohs(ip0->length) - ip4_header_bytes (ip0));
- checksum0 = ~ip_csum_fold (sum0);
- if (PREDICT_FALSE(checksum0 != 0 && checksum0 != 0xffff))
+ if (PREDICT_TRUE (!ip4_is_fragment (ip0)))
{
- next0 = SNAT_IN2OUT_NEXT_DROP;
- goto out;
+ sum0 = ip_incremental_checksum_buffer (sm->vlib_main, b0, (u8 *) icmp0 -
+ (u8 *)
+ vlib_buffer_get_current (b0),
+ ntohs (ip0->length) -
+ ip4_header_bytes (ip0), 0);
+ checksum0 = ~ip_csum_fold (sum0);
+ if (PREDICT_FALSE (checksum0 != 0 && checksum0 != 0xffff))
+ {
+ next0 = SNAT_IN2OUT_NEXT_DROP;
+ goto out;
+ }
}
old_addr0 = ip0->src_address.as_u32;
new_addr0 = ip0->src_address.as_u32 = sm0.addr.as_u32;
- if (vnet_buffer(b0)->sw_if_index[VLIB_TX] == ~0)
- vnet_buffer(b0)->sw_if_index[VLIB_TX] = sm0.fib_index;
sum0 = ip0->checksum;
sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
- src_address /* changed member */);
+ src_address /* changed member */ );
ip0->checksum = ip_csum_fold (sum0);
+ if (icmp0->checksum == 0)
+ icmp0->checksum = 0xffff;
+
if (!icmp_is_error_message (icmp0))
{
new_id0 = sm0.port;
- if (PREDICT_FALSE(new_id0 != echo0->identifier))
- {
- old_id0 = echo0->identifier;
- new_id0 = sm0.port;
- echo0->identifier = new_id0;
-
- sum0 = icmp0->checksum;
- sum0 = ip_csum_update (sum0, old_id0, new_id0, icmp_echo_header_t,
- identifier);
- icmp0->checksum = ip_csum_fold (sum0);
- }
+ if (PREDICT_FALSE (new_id0 != echo0->identifier))
+ {
+ old_id0 = echo0->identifier;
+ new_id0 = sm0.port;
+ echo0->identifier = new_id0;
+
+ sum0 = icmp0->checksum;
+ sum0 = ip_csum_update (sum0, old_id0, new_id0, icmp_echo_header_t,
+ identifier);
+ icmp0->checksum = ip_csum_fold (sum0);
+ }
}
else
{
- inner_ip0 = (ip4_header_t *)(echo0+1);
+ inner_ip0 = (ip4_header_t *) (echo0 + 1);
l4_header = ip4_next_header (inner_ip0);
if (!ip4_header_checksum_is_valid (inner_ip0))
- {
- next0 = SNAT_IN2OUT_NEXT_DROP;
- goto out;
- }
+ {
+ next0 = SNAT_IN2OUT_NEXT_DROP;
+ goto out;
+ }
+ /* update inner destination IP address */
old_addr0 = inner_ip0->dst_address.as_u32;
inner_ip0->dst_address = sm0.addr;
new_addr0 = inner_ip0->dst_address.as_u32;
-
sum0 = icmp0->checksum;
sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
- dst_address /* changed member */);
+ dst_address /* changed member */ );
+ icmp0->checksum = ip_csum_fold (sum0);
+
+ /* update inner IP header checksum */
+ old_checksum0 = inner_ip0->checksum;
+ sum0 = inner_ip0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
+ dst_address /* changed member */ );
+ inner_ip0->checksum = ip_csum_fold (sum0);
+ new_checksum0 = inner_ip0->checksum;
+ sum0 = icmp0->checksum;
+ sum0 = ip_csum_update (sum0, old_checksum0, new_checksum0, ip4_header_t,
+ checksum);
icmp0->checksum = ip_csum_fold (sum0);
switch (protocol)
- {
- case SNAT_PROTOCOL_ICMP:
- inner_icmp0 = (icmp46_header_t*)l4_header;
- inner_echo0 = (icmp_echo_header_t *)(inner_icmp0+1);
-
- old_id0 = inner_echo0->identifier;
- new_id0 = sm0.port;
- inner_echo0->identifier = new_id0;
-
- sum0 = icmp0->checksum;
- sum0 = ip_csum_update (sum0, old_id0, new_id0, icmp_echo_header_t,
- identifier);
- icmp0->checksum = ip_csum_fold (sum0);
- break;
- case SNAT_PROTOCOL_UDP:
- case SNAT_PROTOCOL_TCP:
- old_id0 = ((tcp_udp_header_t*)l4_header)->dst_port;
- new_id0 = sm0.port;
- ((tcp_udp_header_t*)l4_header)->dst_port = new_id0;
-
- sum0 = icmp0->checksum;
- sum0 = ip_csum_update (sum0, old_id0, new_id0, tcp_udp_header_t,
- dst_port);
- icmp0->checksum = ip_csum_fold (sum0);
- break;
- default:
- ASSERT(0);
- }
+ {
+ case SNAT_PROTOCOL_ICMP:
+ inner_icmp0 = (icmp46_header_t *) l4_header;
+ inner_echo0 = (icmp_echo_header_t *) (inner_icmp0 + 1);
+
+ old_id0 = inner_echo0->identifier;
+ new_id0 = sm0.port;
+ inner_echo0->identifier = new_id0;
+
+ sum0 = icmp0->checksum;
+ sum0 = ip_csum_update (sum0, old_id0, new_id0, icmp_echo_header_t,
+ identifier);
+ icmp0->checksum = ip_csum_fold (sum0);
+ break;
+ case SNAT_PROTOCOL_UDP:
+ case SNAT_PROTOCOL_TCP:
+ old_id0 = ((tcp_udp_header_t *) l4_header)->dst_port;
+ new_id0 = sm0.port;
+ ((tcp_udp_header_t *) l4_header)->dst_port = new_id0;
+
+ sum0 = icmp0->checksum;
+ sum0 = ip_csum_update (sum0, old_id0, new_id0, tcp_udp_header_t,
+ dst_port);
+ icmp0->checksum = ip_csum_fold (sum0);
+ break;
+ default:
+ ASSERT (0);
+ }
+ }
+
+ if (vnet_buffer (b0)->sw_if_index[VLIB_TX] == ~0)
+ {
+ if (sm->deterministic ||
+ 0 != snat_icmp_hairpinning (sm, b0, ip0, icmp0,
+ sm->endpoint_dependent))
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = sm0.fib_index;
}
out:
return next0;
}
+#endif
+
+static inline u32
+icmp_in2out_slow_path (snat_main_t * sm,
+ vlib_buffer_t * b0,
+ ip4_header_t * ip0,
+ icmp46_header_t * icmp0,
+ u32 sw_if_index0,
+ u32 rx_fib_index0,
+ vlib_node_runtime_t * node,
+ u32 next0,
+ f64 now, u32 thread_index, snat_session_t ** p_s0)
+{
+ next0 = icmp_in2out (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
+ next0, thread_index, p_s0, 0);
+ snat_session_t *s0 = *p_s0;
+ if (PREDICT_TRUE (next0 != SNAT_IN2OUT_NEXT_DROP && s0))
+ {
+ /* Accounting */
+ nat44_session_update_counters (s0, now,
+ vlib_buffer_length_in_chain
+ (sm->vlib_main, b0), thread_index);
+ /* Per-user LRU list maintenance */
+ nat44_session_update_lru (sm, s0, thread_index);
+ }
+ return next0;
+}
-/**
- * @brief Hairpinning
- *
- * Hairpinning allows two endpoints on the internal side of the NAT to
- * communicate even if they only use each other's external IP addresses
- * and ports.
- *
- * @param sm NAT main.
- * @param b0 Vlib buffer.
- * @param ip0 IP header.
- * @param udp0 UDP header.
- * @param tcp0 TCP header.
- * @param proto0 NAT protocol.
- */
-static inline void
-snat_hairpinning (snat_main_t *sm,
- vlib_buffer_t * b0,
- ip4_header_t * ip0,
- udp_header_t * udp0,
- tcp_header_t * tcp0,
- u32 proto0)
+static int
+nat_in2out_sm_unknown_proto (snat_main_t * sm,
+ vlib_buffer_t * b,
+ ip4_header_t * ip, u32 rx_fib_index)
{
- snat_session_key_t key0, sm0;
- snat_worker_key_t k0;
- snat_session_t * s0;
- clib_bihash_kv_8_8_t kv0, value0;
- ip_csum_t sum0;
- u32 new_dst_addr0 = 0, old_dst_addr0, ti = 0, si;
- u16 new_dst_port0, old_dst_port0;
+ clib_bihash_kv_8_8_t kv, value;
+ snat_static_mapping_t *m;
+ snat_session_key_t m_key;
+ u32 old_addr, new_addr;
+ ip_csum_t sum;
- key0.addr = ip0->dst_address;
- key0.port = udp0->dst_port;
- key0.protocol = proto0;
- key0.fib_index = sm->outside_fib_index;
- kv0.key = key0.as_u64;
+ m_key.addr = ip->src_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_local, &kv, &value))
+ return 1;
- /* Check if destination is in active sessions */
- if (clib_bihash_search_8_8 (&sm->out2in, &kv0, &value0))
- {
- /* or static mappings */
- if (!snat_static_mapping_match(sm, key0, &sm0, 1, 0))
- {
- new_dst_addr0 = sm0.addr.as_u32;
- new_dst_port0 = sm0.port;
- vnet_buffer(b0)->sw_if_index[VLIB_TX] = sm0.fib_index;
- }
- }
- else
- {
- si = value0.value;
- if (sm->num_workers > 1)
- {
- k0.addr = ip0->dst_address;
- k0.port = udp0->dst_port;
- k0.fib_index = sm->outside_fib_index;
- kv0.key = k0.as_u64;
- if (clib_bihash_search_8_8 (&sm->worker_by_out, &kv0, &value0))
- ASSERT(0);
- else
- ti = value0.value;
- }
- else
- ti = sm->num_workers;
+ m = pool_elt_at_index (sm->static_mappings, value.value);
- s0 = pool_elt_at_index (sm->per_thread_data[ti].sessions, si);
- new_dst_addr0 = s0->in2out.addr.as_u32;
- new_dst_port0 = s0->in2out.port;
- vnet_buffer(b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index;
- }
+ old_addr = ip->src_address.as_u32;
+ new_addr = ip->src_address.as_u32 = m->external_addr.as_u32;
+ sum = ip->checksum;
+ sum = ip_csum_update (sum, old_addr, new_addr, ip4_header_t, src_address);
+ ip->checksum = ip_csum_fold (sum);
- /* Destination is behind the same NAT, use internal address and port */
- if (new_dst_addr0)
+
+ /* Hairpinning */
+ if (vnet_buffer (b)->sw_if_index[VLIB_TX] == ~0)
{
- old_dst_addr0 = ip0->dst_address.as_u32;
- ip0->dst_address.as_u32 = new_dst_addr0;
- sum0 = ip0->checksum;
- sum0 = ip_csum_update (sum0, old_dst_addr0, new_dst_addr0,
- ip4_header_t, dst_address);
- ip0->checksum = ip_csum_fold (sum0);
-
- old_dst_port0 = tcp0->dst;
- if (PREDICT_TRUE(new_dst_port0 != old_dst_port0))
- {
- if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP))
- {
- tcp0->dst = new_dst_port0;
- sum0 = tcp0->checksum;
- sum0 = ip_csum_update (sum0, old_dst_addr0, new_dst_addr0,
- ip4_header_t, dst_address);
- sum0 = ip_csum_update (sum0, old_dst_port0, new_dst_port0,
- ip4_header_t /* cheat */, length);
- tcp0->checksum = ip_csum_fold(sum0);
- }
- else
- {
- udp0->dst_port = new_dst_port0;
- udp0->checksum = 0;
- }
- }
- else
- {
- if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP))
- {
- sum0 = tcp0->checksum;
- sum0 = ip_csum_update (sum0, old_dst_addr0, new_dst_addr0,
- ip4_header_t, dst_address);
- tcp0->checksum = ip_csum_fold(sum0);
- }
- }
+ vnet_buffer (b)->sw_if_index[VLIB_TX] = m->fib_index;
+ nat_hairpinning_sm_unknown_proto (sm, b, ip);
}
+
+ return 0;
}
-static inline void
-snat_icmp_hairpinning (snat_main_t *sm,
- vlib_buffer_t * b0,
- ip4_header_t * ip0,
- icmp46_header_t * icmp0)
+static inline uword
+snat_in2out_node_fn_inline (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame, int is_slow_path,
+ int is_output_feature)
{
- snat_session_key_t key0, sm0;
- clib_bihash_kv_8_8_t kv0, value0;
- snat_worker_key_t k0;
- u32 new_dst_addr0 = 0, old_dst_addr0, si, ti = 0;
- ip_csum_t sum0;
- snat_session_t *s0;
-
- if (!icmp_is_error_message (icmp0))
- {
- icmp_echo_header_t *echo0 = (icmp_echo_header_t *)(icmp0+1);
- u16 icmp_id0 = echo0->identifier;
- key0.addr = ip0->dst_address;
- key0.port = icmp_id0;
- key0.protocol = SNAT_PROTOCOL_ICMP;
- key0.fib_index = sm->outside_fib_index;
- kv0.key = key0.as_u64;
-
- /* Check if destination is in active sessions */
- if (clib_bihash_search_8_8 (&sm->out2in, &kv0, &value0))
- {
- /* or static mappings */
- if (!snat_static_mapping_match(sm, key0, &sm0, 1, 0))
- {
- new_dst_addr0 = sm0.addr.as_u32;
- vnet_buffer(b0)->sw_if_index[VLIB_TX] = sm0.fib_index;
- }
- }
- else
- {
- si = value0.value;
- if (sm->num_workers > 1)
- {
- k0.addr = ip0->dst_address;
- k0.port = icmp_id0;
- k0.fib_index = sm->outside_fib_index;
- kv0.key = k0.as_u64;
- if (clib_bihash_search_8_8 (&sm->worker_by_out, &kv0, &value0))
- ASSERT(0);
- else
- ti = value0.value;
- }
- else
- ti = sm->num_workers;
-
- s0 = pool_elt_at_index (sm->per_thread_data[ti].sessions, si);
- new_dst_addr0 = s0->in2out.addr.as_u32;
- vnet_buffer(b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index;
- echo0->identifier = s0->in2out.port;
- sum0 = icmp0->checksum;
- sum0 = ip_csum_update (sum0, icmp_id0, s0->in2out.port,
- icmp_echo_header_t, identifier);
- icmp0->checksum = ip_csum_fold (sum0);
- }
-
- /* Destination is behind the same NAT, use internal address and port */
- if (new_dst_addr0)
- {
- old_dst_addr0 = ip0->dst_address.as_u32;
- ip0->dst_address.as_u32 = new_dst_addr0;
- sum0 = ip0->checksum;
- sum0 = ip_csum_update (sum0, old_dst_addr0, new_dst_addr0,
- ip4_header_t, dst_address);
- ip0->checksum = ip_csum_fold (sum0);
- }
- }
-
-}
-
-static inline u32 icmp_in2out_slow_path (snat_main_t *sm,
- vlib_buffer_t * b0,
- ip4_header_t * ip0,
- icmp46_header_t * icmp0,
- u32 sw_if_index0,
- u32 rx_fib_index0,
- vlib_node_runtime_t * node,
- u32 next0,
- f64 now,
- u32 thread_index,
- snat_session_t ** p_s0)
-{
- next0 = icmp_in2out(sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
- next0, thread_index, p_s0, 0);
- snat_session_t * s0 = *p_s0;
- if (PREDICT_TRUE(next0 != SNAT_IN2OUT_NEXT_DROP && s0))
- {
- /* Hairpinning */
- if (vnet_buffer(b0)->sw_if_index[VLIB_TX] == 0)
- snat_icmp_hairpinning(sm, b0, ip0, icmp0);
- /* 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 translations */
- 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);
- }
- }
- return next0;
-}
-static inline void
-snat_hairpinning_unknown_proto (snat_main_t *sm,
- vlib_buffer_t * b,
- ip4_header_t * ip)
-{
- u32 old_addr, new_addr = 0, ti = 0;
- clib_bihash_kv_8_8_t kv, value;
- clib_bihash_kv_16_8_t s_kv, s_value;
- snat_unk_proto_ses_key_t key;
- snat_session_key_t m_key;
- snat_worker_key_t w_key;
- snat_static_mapping_t *m;
- ip_csum_t sum;
- snat_session_t *s;
-
- old_addr = ip->dst_address.as_u32;
- key.l_addr.as_u32 = ip->dst_address.as_u32;
- key.r_addr.as_u32 = ip->src_address.as_u32;
- key.fib_index = sm->outside_fib_index;
- key.proto = ip->protocol;
- key.rsvd[0] = key.rsvd[1] = key.rsvd[2] = 0;
- s_kv.key[0] = key.as_u64[0];
- s_kv.key[1] = key.as_u64[1];
- if (clib_bihash_search_16_8 (&sm->out2in_unk_proto, &s_kv, &s_value))
- {
- m_key.addr = ip->dst_address;
- m_key.fib_index = sm->outside_fib_index;
- m_key.port = 0;
- m_key.protocol = 0;
- kv.key = m_key.as_u64;
- if (clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value))
- return;
-
- m = pool_elt_at_index (sm->static_mappings, value.value);
- if (vnet_buffer(b)->sw_if_index[VLIB_TX] == ~0)
- vnet_buffer(b)->sw_if_index[VLIB_TX] = m->fib_index;
- new_addr = ip->dst_address.as_u32 = m->local_addr.as_u32;
- }
- else
- {
- if (sm->num_workers > 1)
- {
- w_key.addr = ip->dst_address;
- w_key.port = 0;
- w_key.fib_index = sm->outside_fib_index;
- kv.key = w_key.as_u64;
- if (clib_bihash_search_8_8 (&sm->worker_by_out, &kv, &value))
- return;
- else
- ti = value.value;
- }
- else
- ti = sm->num_workers;
-
- s = pool_elt_at_index (sm->per_thread_data[ti].sessions, s_value.value);
- if (vnet_buffer(b)->sw_if_index[VLIB_TX] == ~0)
- vnet_buffer(b)->sw_if_index[VLIB_TX] = s->in2out.fib_index;
- new_addr = ip->dst_address.as_u32 = s->in2out.addr.as_u32;
- }
- sum = ip->checksum;
- sum = ip_csum_update (sum, old_addr, new_addr, ip4_header_t, dst_address);
- ip->checksum = ip_csum_fold (sum);
-}
-
-static void
-snat_in2out_unknown_proto (snat_main_t *sm,
- vlib_buffer_t * b,
- ip4_header_t * ip,
- u32 rx_fib_index,
- u32 thread_index,
- f64 now,
- vlib_main_t * vm)
-{
- 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 = 0;
- ip_csum_t sum;
- snat_user_key_t u_key;
- snat_user_t *u;
- dlist_elt_t *head, *elt, *oldest;
- snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
- u32 elt_index, head_index, ses_index, oldest_index;
- snat_session_t * s;
- snat_unk_proto_ses_key_t key;
- u32 address_index = ~0;
- int i;
- u8 is_sm = 0;
-
- old_addr = ip->src_address.as_u32;
-
- key.l_addr = ip->src_address;
- key.r_addr = ip->dst_address;
- key.fib_index = rx_fib_index;
- key.proto = ip->protocol;
- key.rsvd[0] = key.rsvd[1] = key.rsvd[2] = 0;
- s_kv.key[0] = key.as_u64[0];
- s_kv.key[1] = key.as_u64[1];
-
- if (!clib_bihash_search_16_8 (&sm->in2out_unk_proto, &s_kv, &s_value))
- {
- s = pool_elt_at_index (tsm->sessions, s_value.value);
- new_addr = ip->src_address.as_u32 = s->out2in.addr.as_u32;
- }
- else
- {
- u_key.addr = ip->src_address;
- u_key.fib_index = rx_fib_index;
- kv.key = u_key.as_u64;
-
- /* Ever heard of the "user" = src ip4 address before? */
- if (clib_bihash_search_8_8 (&sm->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 (&sm->user_hash, &kv, 1);
- }
- else
- {
- u = pool_elt_at_index (tsm->users, value.value);
- }
-
- m_key.addr = ip->src_address;
- m_key.port = 0;
- m_key.protocol = 0;
- m_key.fib_index = rx_fib_index;
- kv.key = m_key.as_u64;
-
- /* Try to find static mapping first */
- if (!clib_bihash_search_8_8 (&sm->static_mapping_by_local, &kv, &value))
- {
- m = pool_elt_at_index (sm->static_mappings, value.value);
- new_addr = ip->src_address.as_u32 = m->external_addr.as_u32;
- is_sm = 1;
- goto create_ses;
- }
- /* Fallback to 3-tuple key */
- else
- {
- /* Choose same out address as for TCP/UDP session to same destination */
- if (!clib_bihash_search_8_8 (&sm->user_hash, &kv, &value))
- {
- head_index = u->sessions_per_user_list_head_index;
- head = pool_elt_at_index (tsm->list_pool, head_index);
- elt_index = head->next;
- elt = pool_elt_at_index (tsm->list_pool, elt_index);
- ses_index = elt->value;
- while (ses_index != ~0)
- {
- s = pool_elt_at_index (tsm->sessions, ses_index);
- elt_index = elt->next;
- elt = pool_elt_at_index (tsm->list_pool, elt_index);
- ses_index = elt->value;
-
- if (s->ext_host_addr.as_u32 == ip->dst_address.as_u32)
- {
- new_addr = ip->src_address.as_u32 = s->out2in.addr.as_u32;
- address_index = s->outside_address_index;
-
- key.fib_index = sm->outside_fib_index;
- key.l_addr.as_u32 = new_addr;
- s_kv.key[0] = key.as_u64[0];
- s_kv.key[1] = key.as_u64[1];
- if (clib_bihash_search_16_8 (&sm->out2in_unk_proto, &s_kv, &s_value))
- break;
-
- goto create_ses;
- }
- }
- }
- key.fib_index = sm->outside_fib_index;
- for (i = 0; i < vec_len (sm->addresses); i++)
- {
- key.l_addr.as_u32 = sm->addresses[i].addr.as_u32;
- s_kv.key[0] = key.as_u64[0];
- s_kv.key[1] = key.as_u64[1];
- if (clib_bihash_search_16_8 (&sm->out2in_unk_proto, &s_kv, &s_value))
- {
- new_addr = ip->src_address.as_u32 = key.l_addr.as_u32;
- address_index = i;
- goto create_ses;
- }
- }
- return;
- }
-
-create_ses:
- /* Over quota? Recycle the least recently used dynamic translation */
- if (u->nsessions >= sm->max_translations_per_user && !is_sm)
- {
- /* Remove the oldest dynamic translation */
- do {
- oldest_index = clib_dlist_remove_head (
- tsm->list_pool, u->sessions_per_user_list_head_index);
-
- ASSERT (oldest_index != ~0);
-
- /* add it back to the end of the LRU list */
- clib_dlist_addtail (tsm->list_pool,
- u->sessions_per_user_list_head_index,
- oldest_index);
- /* Get the list element */
- oldest = pool_elt_at_index (tsm->list_pool, oldest_index);
-
- /* Get the session index from the list element */
- ses_index = oldest->value;
-
- /* Get the session */
- s = pool_elt_at_index (tsm->sessions, ses_index);
- } while (snat_is_session_static (s));
-
- if (snat_is_unk_proto_session (s))
- {
- /* Remove from lookup tables */
- key.l_addr = s->in2out.addr;
- key.r_addr = s->ext_host_addr;
- key.fib_index = s->in2out.fib_index;
- key.proto = s->in2out.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_unk_proto, &s_kv, 0))
- clib_warning ("in2out key del failed");
-
- key.l_addr = s->out2in.addr;
- key.fib_index = s->out2in.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->out2in_unk_proto, &s_kv, 0))
- clib_warning ("out2in key del failed");
- }
- else
- {
- /* log NAT event */
- snat_ipfix_logging_nat44_ses_delete(s->in2out.addr.as_u32,
- s->out2in.addr.as_u32,
- s->in2out.protocol,
- s->in2out.port,
- s->out2in.port,
- s->in2out.fib_index);
-
- snat_free_outside_address_and_port (sm, &s->out2in,
- s->outside_address_index);
-
- /* Remove in2out, out2in keys */
- kv.key = s->in2out.as_u64;
- if (clib_bihash_add_del_8_8 (&sm->in2out, &kv, 0))
- clib_warning ("in2out key del failed");
- kv.key = s->out2in.as_u64;
- if (clib_bihash_add_del_8_8 (&sm->out2in, &kv, 0))
- clib_warning ("out2in key del failed");
- }
- }
- else
- {
- /* Create a new session */
- pool_get (tsm->sessions, s);
- memset (s, 0, sizeof (*s));
-
- /* 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);
- }
-
- s->ext_host_addr.as_u32 = ip->dst_address.as_u32;
- s->flags |= SNAT_SESSION_FLAG_UNKNOWN_PROTO;
- s->outside_address_index = address_index;
- s->out2in.addr.as_u32 = new_addr;
- s->out2in.fib_index = sm->outside_fib_index;
- s->in2out.addr.as_u32 = old_addr;
- s->in2out.fib_index = rx_fib_index;
- s->in2out.port = s->out2in.port = ip->protocol;
- if (is_sm)
- {
- u->nstaticsessions++;
- s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING;
- }
- else
- {
- u->nsessions++;
- }
-
- /* Add to lookup tables */
- key.l_addr.as_u32 = old_addr;
- key.r_addr = ip->dst_address;
- key.proto = ip->protocol;
- key.fib_index = rx_fib_index;
- s_kv.key[0] = key.as_u64[0];
- s_kv.key[1] = key.as_u64[1];
- s_kv.value = s - tsm->sessions;
- if (clib_bihash_add_del_16_8 (&sm->in2out_unk_proto, &s_kv, 1))
- clib_warning ("in2out key add failed");
-
- key.l_addr.as_u32 = new_addr;
- key.fib_index = sm->outside_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->out2in_unk_proto, &s_kv, 1))
- clib_warning ("out2in key add failed");
- }
-
- /* Update IP checksum */
- sum = ip->checksum;
- sum = ip_csum_update (sum, old_addr, new_addr, ip4_header_t, src_address);
- ip->checksum = ip_csum_fold (sum);
-
- /* Accounting */
- 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);
-
- /* Hairpinning */
- if (vnet_buffer(b)->sw_if_index[VLIB_TX] == ~0)
- snat_hairpinning_unknown_proto(sm, b, ip);
-
- if (vnet_buffer(b)->sw_if_index[VLIB_TX] == ~0)
- vnet_buffer(b)->sw_if_index[VLIB_TX] = sm->outside_fib_index;
-}
-
-static inline uword
-snat_in2out_node_fn_inline (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame, int is_slow_path,
- int is_output_feature)
-{
- u32 n_left_from, * from, * to_next;
+ u32 n_left_from, *from, *to_next;
snat_in2out_next_t next_index;
u32 pkts_processed = 0;
- snat_main_t * sm = &snat_main;
+ snat_main_t *sm = &snat_main;
f64 now = vlib_time_now (vm);
u32 stats_node_index;
- u32 thread_index = vlib_get_thread_index ();
+ u32 thread_index = vm->thread_index;
+ u32 tcp_packets = 0, udp_packets = 0, icmp_packets = 0, other_packets =
+ 0, fragments = 0;
- stats_node_index = is_slow_path ? snat_in2out_slowpath_node.index :
- snat_in2out_node.index;
+ stats_node_index = is_slow_path ? sm->in2out_slowpath_node_index :
+ sm->in2out_node_index;
from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
{
u32 n_left_to_next;
- vlib_get_next_frame (vm, node, next_index,
- to_next, n_left_to_next);
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
while (n_left_from >= 4 && n_left_to_next >= 2)
{
- u32 bi0, bi1;
- vlib_buffer_t * b0, * b1;
- u32 next0, next1;
- u32 sw_if_index0, sw_if_index1;
- ip4_header_t * ip0, * ip1;
- ip_csum_t sum0, sum1;
- u32 new_addr0, old_addr0, new_addr1, old_addr1;
- u16 old_port0, new_port0, old_port1, new_port1;
- udp_header_t * udp0, * udp1;
- tcp_header_t * tcp0, * tcp1;
- icmp46_header_t * icmp0, * icmp1;
- snat_session_key_t key0, key1;
- u32 rx_fib_index0, rx_fib_index1;
- u32 proto0, proto1;
- snat_session_t * s0 = 0, * s1 = 0;
- clib_bihash_kv_8_8_t kv0, value0, kv1, value1;
- u32 iph_offset0 = 0, iph_offset1 = 0;
+ u32 bi0, bi1;
+ vlib_buffer_t *b0, *b1;
+ u32 next0, next1;
+ u32 sw_if_index0, sw_if_index1;
+ ip4_header_t *ip0, *ip1;
+ ip_csum_t sum0, sum1;
+ u32 new_addr0, old_addr0, new_addr1, old_addr1;
+ u16 old_port0, new_port0, old_port1, new_port1;
+ udp_header_t *udp0, *udp1;
+ tcp_header_t *tcp0, *tcp1;
+ icmp46_header_t *icmp0, *icmp1;
+ snat_session_key_t key0, key1;
+ u32 rx_fib_index0, rx_fib_index1;
+ u32 proto0, proto1;
+ snat_session_t *s0 = 0, *s1 = 0;
+ clib_bihash_kv_8_8_t kv0, value0, kv1, value1;
+ u32 iph_offset0 = 0, iph_offset1 = 0;
/* Prefetch next iteration. */
{
- vlib_buffer_t * p2, * p3;
+ vlib_buffer_t *p2, *p3;
p2 = vlib_get_buffer (vm, from[2]);
p3 = vlib_get_buffer (vm, from[3]);
CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, STORE);
}
- /* speculatively enqueue b0 and b1 to the current next frame */
+ /* speculatively enqueue b0 and b1 to the current next frame */
to_next[0] = bi0 = from[0];
to_next[1] = bi1 = from[1];
from += 2;
b0 = vlib_get_buffer (vm, bi0);
b1 = vlib_get_buffer (vm, bi1);
- if (is_output_feature)
- iph_offset0 = vnet_buffer (b0)->ip.save_rewrite_length;
+ if (is_output_feature)
+ iph_offset0 = vnet_buffer (b0)->ip.save_rewrite_length;
- ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) +
- iph_offset0);
+ ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) +
+ iph_offset0);
- udp0 = ip4_next_header (ip0);
- tcp0 = (tcp_header_t *) udp0;
- icmp0 = (icmp46_header_t *) udp0;
+ udp0 = ip4_next_header (ip0);
+ tcp0 = (tcp_header_t *) udp0;
+ icmp0 = (icmp46_header_t *) udp0;
- sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
rx_fib_index0 = vec_elt (sm->ip4_main->fib_index_by_sw_if_index,
- sw_if_index0);
+ sw_if_index0);
- next0 = next1 = SNAT_IN2OUT_NEXT_LOOKUP;
+ next0 = next1 = SNAT_IN2OUT_NEXT_LOOKUP;
- if (PREDICT_FALSE(ip0->ttl == 1))
- {
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
- icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
- ICMP4_time_exceeded_ttl_exceeded_in_transit,
- 0);
- next0 = SNAT_IN2OUT_NEXT_ICMP_ERROR;
- goto trace00;
- }
+ if (PREDICT_FALSE (ip0->ttl == 1))
+ {
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
+ icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
+ ICMP4_time_exceeded_ttl_exceeded_in_transit,
+ 0);
+ next0 = SNAT_IN2OUT_NEXT_ICMP_ERROR;
+ goto trace00;
+ }
- proto0 = ip_proto_to_snat_proto (ip0->protocol);
+ proto0 = ip_proto_to_snat_proto (ip0->protocol);
- /* Next configured feature, probably ip4-lookup */
- if (is_slow_path)
- {
- if (PREDICT_FALSE (proto0 == ~0))
- {
- snat_in2out_unknown_proto (sm, b0, ip0, rx_fib_index0,
- thread_index, now, vm);
- goto trace00;
- }
+ /* Next configured feature, probably ip4-lookup */
+ if (is_slow_path)
+ {
+ if (PREDICT_FALSE (proto0 == ~0))
+ {
+ if (nat_in2out_sm_unknown_proto
+ (sm, b0, ip0, rx_fib_index0))
+ {
+ next0 = SNAT_IN2OUT_NEXT_DROP;
+ b0->error =
+ node->errors[SNAT_IN2OUT_ERROR_UNSUPPORTED_PROTOCOL];
+ }
+ other_packets++;
+ goto trace00;
+ }
+
+ if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
+ {
+ next0 = icmp_in2out_slow_path
+ (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0,
+ node, next0, now, thread_index, &s0);
+ icmp_packets++;
+ goto trace00;
+ }
+ }
+ else
+ {
+ if (PREDICT_FALSE (proto0 == ~0))
+ {
+ next0 = SNAT_IN2OUT_NEXT_SLOW_PATH;
+ goto trace00;
+ }
+
+ if (ip4_is_fragment (ip0))
+ {
+ next0 = SNAT_IN2OUT_NEXT_REASS;
+ fragments++;
+ goto trace00;
+ }
+
+ if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
+ {
+ next0 = SNAT_IN2OUT_NEXT_SLOW_PATH;
+ goto trace00;
+ }
+ }
- if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
- {
- next0 = icmp_in2out_slow_path
- (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0,
- node, next0, now, thread_index, &s0);
- goto trace00;
- }
- }
- else
- {
- if (PREDICT_FALSE (proto0 == ~0 || proto0 == SNAT_PROTOCOL_ICMP))
- {
- next0 = SNAT_IN2OUT_NEXT_SLOW_PATH;
- goto trace00;
- }
- }
+ key0.addr = ip0->src_address;
+ key0.port = udp0->src_port;
+ key0.protocol = proto0;
+ key0.fib_index = rx_fib_index0;
- key0.addr = ip0->src_address;
- key0.port = udp0->src_port;
- key0.protocol = proto0;
- key0.fib_index = rx_fib_index0;
+ kv0.key = key0.as_u64;
- kv0.key = key0.as_u64;
+ if (PREDICT_FALSE
+ (clib_bihash_search_8_8
+ (&sm->per_thread_data[thread_index].in2out, &kv0,
+ &value0) != 0))
+ {
+ if (is_slow_path)
+ {
+ if (is_output_feature)
+ {
+ if (PREDICT_FALSE (nat_not_translate_output_feature (sm,
+ ip0,
+ proto0,
+ udp0->src_port,
+ udp0->dst_port,
+ thread_index,
+ sw_if_index0)))
+ goto trace00;
+ }
+ else
+ {
+ if (PREDICT_FALSE
+ (snat_not_translate
+ (sm, node, sw_if_index0, ip0, proto0,
+ rx_fib_index0, thread_index)))
+ goto trace00;
+ }
+
+ next0 = slow_path (sm, b0, ip0, rx_fib_index0, &key0,
+ &s0, node, next0, thread_index, now);
+ if (PREDICT_FALSE (next0 == SNAT_IN2OUT_NEXT_DROP))
+ goto trace00;
+
+ if (PREDICT_FALSE (!s0))
+ goto trace00;
+ }
+ else
+ {
+ next0 = SNAT_IN2OUT_NEXT_SLOW_PATH;
+ goto trace00;
+ }
+ }
+ else
+ s0 =
+ pool_elt_at_index (sm->per_thread_data[thread_index].sessions,
+ value0.value);
- if (PREDICT_FALSE (clib_bihash_search_8_8 (&sm->in2out, &kv0, &value0) != 0))
- {
- if (is_slow_path)
- {
- if (PREDICT_FALSE(snat_not_translate(sm, node, sw_if_index0,
- ip0, proto0, rx_fib_index0)) && !is_output_feature)
- goto trace00;
-
- next0 = slow_path (sm, b0, ip0, rx_fib_index0, &key0,
- &s0, node, next0, thread_index);
- if (PREDICT_FALSE (next0 == SNAT_IN2OUT_NEXT_DROP))
- goto trace00;
- }
- else
- {
- next0 = SNAT_IN2OUT_NEXT_SLOW_PATH;
- goto trace00;
- }
- }
- else
- s0 = pool_elt_at_index (sm->per_thread_data[thread_index].sessions,
- value0.value);
-
- old_addr0 = ip0->src_address.as_u32;
- ip0->src_address = s0->out2in.addr;
- new_addr0 = ip0->src_address.as_u32;
- if (!is_output_feature)
- vnet_buffer(b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index;
-
- sum0 = ip0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
- ip4_header_t,
- src_address /* changed member */);
- ip0->checksum = ip_csum_fold (sum0);
-
- if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP))
- {
- old_port0 = tcp0->src_port;
- tcp0->src_port = s0->out2in.port;
- new_port0 = tcp0->src_port;
-
- sum0 = tcp0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
- ip4_header_t,
- dst_address /* changed member */);
- sum0 = ip_csum_update (sum0, old_port0, new_port0,
- ip4_header_t /* cheat */,
- length /* changed member */);
- tcp0->checksum = ip_csum_fold(sum0);
- }
- else
- {
- old_port0 = udp0->src_port;
- udp0->src_port = s0->out2in.port;
- udp0->checksum = 0;
- }
+ b0->flags |= VNET_BUFFER_F_IS_NATED;
- /* Hairpinning */
- if (!is_output_feature)
- snat_hairpinning (sm, b0, ip0, udp0, tcp0, proto0);
+ old_addr0 = ip0->src_address.as_u32;
+ ip0->src_address = s0->out2in.addr;
+ new_addr0 = ip0->src_address.as_u32;
+ if (!is_output_feature)
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index;
- /* 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:
+ sum0 = ip0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
+ ip4_header_t,
+ src_address /* changed member */ );
+ ip0->checksum = ip_csum_fold (sum0);
- if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b0->flags & VLIB_BUFFER_IS_TRACED)))
- {
- snat_in2out_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->is_slow_path = is_slow_path;
- t->sw_if_index = sw_if_index0;
- t->next_index = next0;
- t->session_index = ~0;
- if (s0)
- t->session_index = s0 - sm->per_thread_data[thread_index].sessions;
- }
+ if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
+ {
+ old_port0 = tcp0->src_port;
+ tcp0->src_port = s0->out2in.port;
+ new_port0 = tcp0->src_port;
+
+ sum0 = tcp0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
+ ip4_header_t,
+ dst_address /* changed member */ );
+ sum0 = ip_csum_update (sum0, old_port0, new_port0,
+ ip4_header_t /* cheat */ ,
+ length /* changed member */ );
+ mss_clamping (sm, tcp0, &sum0);
+ tcp0->checksum = ip_csum_fold (sum0);
+ tcp_packets++;
+ }
+ else
+ {
+ old_port0 = udp0->src_port;
+ udp0->src_port = s0->out2in.port;
+ udp0->checksum = 0;
+ udp_packets++;
+ }
+
+ /* 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_in2out_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->is_slow_path = is_slow_path;
+ t->sw_if_index = sw_if_index0;
+ t->next_index = next0;
+ t->session_index = ~0;
+ if (s0)
+ t->session_index =
+ s0 - sm->per_thread_data[thread_index].sessions;
+ }
- pkts_processed += next0 != SNAT_IN2OUT_NEXT_DROP;
+ pkts_processed += next0 == SNAT_IN2OUT_NEXT_LOOKUP;
- if (is_output_feature)
- iph_offset1 = vnet_buffer (b1)->ip.save_rewrite_length;
+ if (is_output_feature)
+ iph_offset1 = vnet_buffer (b1)->ip.save_rewrite_length;
- ip1 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b1) +
- iph_offset1);
+ ip1 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b1) +
+ iph_offset1);
- udp1 = ip4_next_header (ip1);
- tcp1 = (tcp_header_t *) udp1;
- icmp1 = (icmp46_header_t *) udp1;
+ udp1 = ip4_next_header (ip1);
+ tcp1 = (tcp_header_t *) udp1;
+ icmp1 = (icmp46_header_t *) udp1;
- sw_if_index1 = vnet_buffer(b1)->sw_if_index[VLIB_RX];
+ sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX];
rx_fib_index1 = vec_elt (sm->ip4_main->fib_index_by_sw_if_index,
- sw_if_index1);
+ sw_if_index1);
- if (PREDICT_FALSE(ip1->ttl == 1))
- {
- vnet_buffer (b1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
- icmp4_error_set_vnet_buffer (b1, ICMP4_time_exceeded,
- ICMP4_time_exceeded_ttl_exceeded_in_transit,
- 0);
- next1 = SNAT_IN2OUT_NEXT_ICMP_ERROR;
- goto trace01;
- }
+ if (PREDICT_FALSE (ip1->ttl == 1))
+ {
+ vnet_buffer (b1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
+ icmp4_error_set_vnet_buffer (b1, ICMP4_time_exceeded,
+ ICMP4_time_exceeded_ttl_exceeded_in_transit,
+ 0);
+ next1 = SNAT_IN2OUT_NEXT_ICMP_ERROR;
+ goto trace01;
+ }
- proto1 = ip_proto_to_snat_proto (ip1->protocol);
+ proto1 = ip_proto_to_snat_proto (ip1->protocol);
- /* Next configured feature, probably ip4-lookup */
- if (is_slow_path)
- {
- if (PREDICT_FALSE (proto1 == ~0))
- {
- snat_in2out_unknown_proto (sm, b1, ip1, rx_fib_index1,
- thread_index, now, vm);
- goto trace01;
- }
+ /* Next configured feature, probably ip4-lookup */
+ if (is_slow_path)
+ {
+ if (PREDICT_FALSE (proto1 == ~0))
+ {
+ if (nat_in2out_sm_unknown_proto
+ (sm, b1, ip1, rx_fib_index1))
+ {
+ next1 = SNAT_IN2OUT_NEXT_DROP;
+ b1->error =
+ node->errors[SNAT_IN2OUT_ERROR_UNSUPPORTED_PROTOCOL];
+ }
+ other_packets++;
+ goto trace01;
+ }
+
+ if (PREDICT_FALSE (proto1 == SNAT_PROTOCOL_ICMP))
+ {
+ next1 = icmp_in2out_slow_path
+ (sm, b1, ip1, icmp1, sw_if_index1, rx_fib_index1, node,
+ next1, now, thread_index, &s1);
+ icmp_packets++;
+ goto trace01;
+ }
+ }
+ else
+ {
+ if (PREDICT_FALSE (proto1 == ~0))
+ {
+ next1 = SNAT_IN2OUT_NEXT_SLOW_PATH;
+ goto trace01;
+ }
+
+ if (ip4_is_fragment (ip1))
+ {
+ next1 = SNAT_IN2OUT_NEXT_REASS;
+ fragments++;
+ goto trace01;
+ }
+
+ if (PREDICT_FALSE (proto1 == SNAT_PROTOCOL_ICMP))
+ {
+ next1 = SNAT_IN2OUT_NEXT_SLOW_PATH;
+ goto trace01;
+ }
+ }
- if (PREDICT_FALSE (proto1 == SNAT_PROTOCOL_ICMP))
- {
- next1 = icmp_in2out_slow_path
- (sm, b1, ip1, icmp1, sw_if_index1, rx_fib_index1, node,
- next1, now, thread_index, &s1);
- goto trace01;
- }
- }
- else
- {
- if (PREDICT_FALSE (proto1 == ~0 || proto1 == SNAT_PROTOCOL_ICMP))
- {
- next1 = SNAT_IN2OUT_NEXT_SLOW_PATH;
- goto trace01;
- }
- }
+ key1.addr = ip1->src_address;
+ key1.port = udp1->src_port;
+ key1.protocol = proto1;
+ key1.fib_index = rx_fib_index1;
- key1.addr = ip1->src_address;
- key1.port = udp1->src_port;
- key1.protocol = proto1;
- key1.fib_index = rx_fib_index1;
+ kv1.key = key1.as_u64;
- kv1.key = key1.as_u64;
+ if (PREDICT_FALSE
+ (clib_bihash_search_8_8
+ (&sm->per_thread_data[thread_index].in2out, &kv1,
+ &value1) != 0))
+ {
+ if (is_slow_path)
+ {
+ if (is_output_feature)
+ {
+ if (PREDICT_FALSE (nat_not_translate_output_feature (sm,
+ ip1,
+ proto1,
+ udp1->src_port,
+ udp1->dst_port,
+ thread_index,
+ sw_if_index1)))
+ goto trace01;
+ }
+ else
+ {
+ if (PREDICT_FALSE
+ (snat_not_translate
+ (sm, node, sw_if_index1, ip1, proto1,
+ rx_fib_index1, thread_index)))
+ goto trace01;
+ }
+
+ next1 = slow_path (sm, b1, ip1, rx_fib_index1, &key1,
+ &s1, node, next1, thread_index, now);
+ if (PREDICT_FALSE (next1 == SNAT_IN2OUT_NEXT_DROP))
+ goto trace01;
+
+ if (PREDICT_FALSE (!s1))
+ goto trace01;
+ }
+ else
+ {
+ next1 = SNAT_IN2OUT_NEXT_SLOW_PATH;
+ goto trace01;
+ }
+ }
+ else
+ s1 =
+ pool_elt_at_index (sm->per_thread_data[thread_index].sessions,
+ value1.value);
- if (PREDICT_FALSE(clib_bihash_search_8_8 (&sm->in2out, &kv1, &value1) != 0))
- {
- if (is_slow_path)
- {
- if (PREDICT_FALSE(snat_not_translate(sm, node, sw_if_index1,
- ip1, proto1, rx_fib_index1)) && !is_output_feature)
- goto trace01;
-
- next1 = slow_path (sm, b1, ip1, rx_fib_index1, &key1,
- &s1, node, next1, thread_index);
- if (PREDICT_FALSE (next1 == SNAT_IN2OUT_NEXT_DROP))
- goto trace01;
- }
- else
- {
- next1 = SNAT_IN2OUT_NEXT_SLOW_PATH;
- goto trace01;
- }
- }
- else
- s1 = pool_elt_at_index (sm->per_thread_data[thread_index].sessions,
- value1.value);
-
- old_addr1 = ip1->src_address.as_u32;
- ip1->src_address = s1->out2in.addr;
- new_addr1 = ip1->src_address.as_u32;
- if (!is_output_feature)
- vnet_buffer(b1)->sw_if_index[VLIB_TX] = s1->out2in.fib_index;
-
- sum1 = ip1->checksum;
- sum1 = ip_csum_update (sum1, old_addr1, new_addr1,
- ip4_header_t,
- src_address /* changed member */);
- ip1->checksum = ip_csum_fold (sum1);
-
- if (PREDICT_TRUE(proto1 == SNAT_PROTOCOL_TCP))
- {
- old_port1 = tcp1->src_port;
- tcp1->src_port = s1->out2in.port;
- new_port1 = tcp1->src_port;
-
- sum1 = tcp1->checksum;
- sum1 = ip_csum_update (sum1, old_addr1, new_addr1,
- ip4_header_t,
- dst_address /* changed member */);
- sum1 = ip_csum_update (sum1, old_port1, new_port1,
- ip4_header_t /* cheat */,
- length /* changed member */);
- tcp1->checksum = ip_csum_fold(sum1);
- }
- else
- {
- old_port1 = udp1->src_port;
- udp1->src_port = s1->out2in.port;
- udp1->checksum = 0;
- }
+ b1->flags |= VNET_BUFFER_F_IS_NATED;
- /* Hairpinning */
- if (!is_output_feature)
- snat_hairpinning (sm, b1, ip1, udp1, tcp1, proto1);
+ old_addr1 = ip1->src_address.as_u32;
+ ip1->src_address = s1->out2in.addr;
+ new_addr1 = ip1->src_address.as_u32;
+ if (!is_output_feature)
+ vnet_buffer (b1)->sw_if_index[VLIB_TX] = s1->out2in.fib_index;
- /* 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);
- }
- trace01:
+ sum1 = ip1->checksum;
+ sum1 = ip_csum_update (sum1, old_addr1, new_addr1,
+ ip4_header_t,
+ src_address /* changed member */ );
+ ip1->checksum = ip_csum_fold (sum1);
- if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b1->flags & VLIB_BUFFER_IS_TRACED)))
- {
- snat_in2out_trace_t *t =
- vlib_add_trace (vm, node, b1, sizeof (*t));
- t->sw_if_index = sw_if_index1;
- t->next_index = next1;
- t->session_index = ~0;
- if (s1)
- t->session_index = s1 - sm->per_thread_data[thread_index].sessions;
- }
+ if (PREDICT_TRUE (proto1 == SNAT_PROTOCOL_TCP))
+ {
+ old_port1 = tcp1->src_port;
+ tcp1->src_port = s1->out2in.port;
+ new_port1 = tcp1->src_port;
+
+ sum1 = tcp1->checksum;
+ sum1 = ip_csum_update (sum1, old_addr1, new_addr1,
+ ip4_header_t,
+ dst_address /* changed member */ );
+ sum1 = ip_csum_update (sum1, old_port1, new_port1,
+ ip4_header_t /* cheat */ ,
+ length /* changed member */ );
+ mss_clamping (sm, tcp1, &sum1);
+ tcp1->checksum = ip_csum_fold (sum1);
+ tcp_packets++;
+ }
+ else
+ {
+ old_port1 = udp1->src_port;
+ udp1->src_port = s1->out2in.port;
+ udp1->checksum = 0;
+ udp_packets++;
+ }
- pkts_processed += next1 != SNAT_IN2OUT_NEXT_DROP;
+ /* 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);
+ trace01:
- /* verify speculative enqueues, maybe switch current next frame */
- vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
- to_next, n_left_to_next,
- bi0, bi1, next0, next1);
- }
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b1->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ snat_in2out_trace_t *t =
+ vlib_add_trace (vm, node, b1, sizeof (*t));
+ t->sw_if_index = sw_if_index1;
+ t->next_index = next1;
+ t->session_index = ~0;
+ if (s1)
+ t->session_index =
+ s1 - sm->per_thread_data[thread_index].sessions;
+ }
+
+ pkts_processed += next1 == SNAT_IN2OUT_NEXT_LOOKUP;
+
+ /* verify speculative enqueues, maybe switch current next frame */
+ vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
+ to_next, n_left_to_next,
+ bi0, bi1, next0, next1);
+ }
while (n_left_from > 0 && n_left_to_next > 0)
{
- u32 bi0;
- vlib_buffer_t * b0;
- u32 next0;
- u32 sw_if_index0;
- ip4_header_t * ip0;
- ip_csum_t sum0;
- u32 new_addr0, old_addr0;
- u16 old_port0, new_port0;
- udp_header_t * udp0;
- tcp_header_t * tcp0;
- icmp46_header_t * icmp0;
- snat_session_key_t key0;
- u32 rx_fib_index0;
- u32 proto0;
- snat_session_t * s0 = 0;
- clib_bihash_kv_8_8_t kv0, value0;
- u32 iph_offset0 = 0;
-
- /* speculatively enqueue b0 to the current next frame */
+ u32 bi0;
+ vlib_buffer_t *b0;
+ u32 next0;
+ u32 sw_if_index0;
+ ip4_header_t *ip0;
+ ip_csum_t sum0;
+ u32 new_addr0, old_addr0;
+ u16 old_port0, new_port0;
+ udp_header_t *udp0;
+ tcp_header_t *tcp0;
+ icmp46_header_t *icmp0;
+ snat_session_key_t key0;
+ u32 rx_fib_index0;
+ u32 proto0;
+ snat_session_t *s0 = 0;
+ clib_bihash_kv_8_8_t kv0, value0;
+ u32 iph_offset0 = 0;
+
+ /* speculatively enqueue b0 to the current next frame */
bi0 = from[0];
to_next[0] = bi0;
from += 1;
to_next += 1;
- n_left_from -= 1;
- n_left_to_next -= 1;
-
- b0 = vlib_get_buffer (vm, bi0);
- next0 = SNAT_IN2OUT_NEXT_LOOKUP;
-
- if (is_output_feature)
- iph_offset0 = vnet_buffer (b0)->ip.save_rewrite_length;
-
- ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) +
- iph_offset0);
-
- 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_IN2OUT_NEXT_ICMP_ERROR;
- goto trace0;
- }
-
- proto0 = ip_proto_to_snat_proto (ip0->protocol);
-
- /* Next configured feature, probably ip4-lookup */
- if (is_slow_path)
- {
- if (PREDICT_FALSE (proto0 == ~0))
- {
- snat_in2out_unknown_proto (sm, b0, ip0, rx_fib_index0,
- thread_index, now, vm);
- goto trace0;
- }
-
- if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
- {
- next0 = icmp_in2out_slow_path
- (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
- next0, now, thread_index, &s0);
- goto trace0;
- }
- }
- else
- {
- if (PREDICT_FALSE (proto0 == ~0 || proto0 == SNAT_PROTOCOL_ICMP))
- {
- next0 = SNAT_IN2OUT_NEXT_SLOW_PATH;
- goto trace0;
- }
- }
-
- key0.addr = ip0->src_address;
- key0.port = udp0->src_port;
- key0.protocol = proto0;
- key0.fib_index = rx_fib_index0;
-
- kv0.key = key0.as_u64;
-
- if (clib_bihash_search_8_8 (&sm->in2out, &kv0, &value0))
- {
- if (is_slow_path)
- {
- if (PREDICT_FALSE(snat_not_translate(sm, node, sw_if_index0,
- ip0, proto0, rx_fib_index0)) && !is_output_feature)
- goto trace0;
-
- next0 = slow_path (sm, b0, ip0, rx_fib_index0, &key0,
- &s0, node, next0, thread_index);
-
- if (PREDICT_FALSE (next0 == SNAT_IN2OUT_NEXT_DROP))
- goto trace0;
- }
- else
- {
- next0 = SNAT_IN2OUT_NEXT_SLOW_PATH;
- goto trace0;
- }
- }
- else
- s0 = pool_elt_at_index (sm->per_thread_data[thread_index].sessions,
- value0.value);
-
- old_addr0 = ip0->src_address.as_u32;
- ip0->src_address = s0->out2in.addr;
- new_addr0 = ip0->src_address.as_u32;
- if (!is_output_feature)
- vnet_buffer(b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index;
-
- sum0 = ip0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
- ip4_header_t,
- src_address /* changed member */);
- ip0->checksum = ip_csum_fold (sum0);
-
- if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP))
- {
- old_port0 = tcp0->src_port;
- tcp0->src_port = s0->out2in.port;
- new_port0 = tcp0->src_port;
-
- sum0 = tcp0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
- ip4_header_t,
- dst_address /* changed member */);
- sum0 = ip_csum_update (sum0, old_port0, new_port0,
- ip4_header_t /* cheat */,
- length /* changed member */);
- tcp0->checksum = ip_csum_fold(sum0);
- }
- else
- {
- old_port0 = udp0->src_port;
- udp0->src_port = s0->out2in.port;
- udp0->checksum = 0;
- }
-
- /* Hairpinning */
- if (!is_output_feature)
- snat_hairpinning (sm, b0, ip0, udp0, tcp0, proto0);
-
- /* 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_in2out_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->is_slow_path = is_slow_path;
- t->sw_if_index = sw_if_index0;
- t->next_index = next0;
- t->session_index = ~0;
- if (s0)
- t->session_index = s0 - sm->per_thread_data[thread_index].sessions;
- }
-
- pkts_processed += next0 != SNAT_IN2OUT_NEXT_DROP;
-
- /* verify speculative enqueue, maybe switch current next frame */
- vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
- to_next, n_left_to_next,
- bi0, next0);
- }
-
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
- }
-
- vlib_node_increment_counter (vm, stats_node_index,
- SNAT_IN2OUT_ERROR_IN2OUT_PACKETS,
- pkts_processed);
- return frame->n_vectors;
-}
-
-static uword
-snat_in2out_fast_path_fn (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- return snat_in2out_node_fn_inline (vm, node, frame, 0 /* is_slow_path */, 0);
-}
-
-VLIB_REGISTER_NODE (snat_in2out_node) = {
- .function = snat_in2out_fast_path_fn,
- .name = "nat44-in2out",
- .vector_size = sizeof (u32),
- .format_trace = format_snat_in2out_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
-
- .n_errors = ARRAY_LEN(snat_in2out_error_strings),
- .error_strings = snat_in2out_error_strings,
-
- .runtime_data_bytes = sizeof (snat_runtime_t),
-
- .n_next_nodes = SNAT_IN2OUT_N_NEXT,
-
- /* edit / add dispositions here */
- .next_nodes = {
- [SNAT_IN2OUT_NEXT_DROP] = "error-drop",
- [SNAT_IN2OUT_NEXT_LOOKUP] = "ip4-lookup",
- [SNAT_IN2OUT_NEXT_SLOW_PATH] = "nat44-in2out-slowpath",
- [SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
- },
-};
-
-VLIB_NODE_FUNCTION_MULTIARCH (snat_in2out_node, snat_in2out_fast_path_fn);
-
-static uword
-snat_in2out_output_fast_path_fn (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- return snat_in2out_node_fn_inline (vm, node, frame, 0 /* is_slow_path */, 1);
-}
-
-VLIB_REGISTER_NODE (snat_in2out_output_node) = {
- .function = snat_in2out_output_fast_path_fn,
- .name = "nat44-in2out-output",
- .vector_size = sizeof (u32),
- .format_trace = format_snat_in2out_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
-
- .n_errors = ARRAY_LEN(snat_in2out_error_strings),
- .error_strings = snat_in2out_error_strings,
-
- .runtime_data_bytes = sizeof (snat_runtime_t),
-
- .n_next_nodes = SNAT_IN2OUT_N_NEXT,
-
- /* edit / add dispositions here */
- .next_nodes = {
- [SNAT_IN2OUT_NEXT_DROP] = "error-drop",
- [SNAT_IN2OUT_NEXT_LOOKUP] = "interface-output",
- [SNAT_IN2OUT_NEXT_SLOW_PATH] = "nat44-in2out-output-slowpath",
- [SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
- },
-};
-
-VLIB_NODE_FUNCTION_MULTIARCH (snat_in2out_output_node,
- snat_in2out_output_fast_path_fn);
-
-static uword
-snat_in2out_slow_path_fn (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- return snat_in2out_node_fn_inline (vm, node, frame, 1 /* is_slow_path */, 0);
-}
-
-VLIB_REGISTER_NODE (snat_in2out_slowpath_node) = {
- .function = snat_in2out_slow_path_fn,
- .name = "nat44-in2out-slowpath",
- .vector_size = sizeof (u32),
- .format_trace = format_snat_in2out_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
-
- .n_errors = ARRAY_LEN(snat_in2out_error_strings),
- .error_strings = snat_in2out_error_strings,
-
- .runtime_data_bytes = sizeof (snat_runtime_t),
-
- .n_next_nodes = SNAT_IN2OUT_N_NEXT,
-
- /* edit / add dispositions here */
- .next_nodes = {
- [SNAT_IN2OUT_NEXT_DROP] = "error-drop",
- [SNAT_IN2OUT_NEXT_LOOKUP] = "ip4-lookup",
- [SNAT_IN2OUT_NEXT_SLOW_PATH] = "nat44-in2out-slowpath",
- [SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
- },
-};
-
-VLIB_NODE_FUNCTION_MULTIARCH (snat_in2out_slowpath_node,
- snat_in2out_slow_path_fn);
-
-static uword
-snat_in2out_output_slow_path_fn (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- return snat_in2out_node_fn_inline (vm, node, frame, 1 /* is_slow_path */, 1);
-}
-
-VLIB_REGISTER_NODE (snat_in2out_output_slowpath_node) = {
- .function = snat_in2out_output_slow_path_fn,
- .name = "nat44-in2out-output-slowpath",
- .vector_size = sizeof (u32),
- .format_trace = format_snat_in2out_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
-
- .n_errors = ARRAY_LEN(snat_in2out_error_strings),
- .error_strings = snat_in2out_error_strings,
-
- .runtime_data_bytes = sizeof (snat_runtime_t),
-
- .n_next_nodes = SNAT_IN2OUT_N_NEXT,
-
- /* edit / add dispositions here */
- .next_nodes = {
- [SNAT_IN2OUT_NEXT_DROP] = "error-drop",
- [SNAT_IN2OUT_NEXT_LOOKUP] = "interface-output",
- [SNAT_IN2OUT_NEXT_SLOW_PATH] = "nat44-in2out-output-slowpath",
- [SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
- },
-};
-
-VLIB_NODE_FUNCTION_MULTIARCH (snat_in2out_output_slowpath_node,
- snat_in2out_output_slow_path_fn);
-
-/**************************/
-/*** deterministic mode ***/
-/**************************/
-static uword
-snat_det_in2out_node_fn (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- u32 n_left_from, * from, * to_next;
- snat_in2out_next_t next_index;
- u32 pkts_processed = 0;
- snat_main_t * sm = &snat_main;
- u32 now = (u32) vlib_time_now (vm);
- u32 thread_index = vlib_get_thread_index ();
-
- from = vlib_frame_vector_args (frame);
- n_left_from = frame->n_vectors;
- next_index = node->cached_next_index;
-
- while (n_left_from > 0)
- {
- u32 n_left_to_next;
-
- vlib_get_next_frame (vm, node, next_index,
- to_next, n_left_to_next);
-
- while (n_left_from >= 4 && n_left_to_next >= 2)
- {
- u32 bi0, bi1;
- vlib_buffer_t * b0, * b1;
- u32 next0, next1;
- u32 sw_if_index0, sw_if_index1;
- ip4_header_t * ip0, * ip1;
- ip_csum_t sum0, sum1;
- ip4_address_t new_addr0, old_addr0, new_addr1, old_addr1;
- u16 old_port0, new_port0, lo_port0, i0;
- u16 old_port1, new_port1, lo_port1, i1;
- udp_header_t * udp0, * udp1;
- tcp_header_t * tcp0, * tcp1;
- u32 proto0, proto1;
- snat_det_out_key_t key0, key1;
- snat_det_map_t * dm0, * dm1;
- snat_det_session_t * ses0 = 0, * ses1 = 0;
- u32 rx_fib_index0, rx_fib_index1;
- icmp46_header_t * icmp0, * icmp1;
-
- /* Prefetch next iteration. */
- {
- vlib_buffer_t * p2, * p3;
-
- p2 = vlib_get_buffer (vm, from[2]);
- p3 = vlib_get_buffer (vm, from[3]);
-
- vlib_prefetch_buffer_header (p2, LOAD);
- vlib_prefetch_buffer_header (p3, LOAD);
-
- CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, STORE);
- CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, STORE);
- }
-
- /* speculatively enqueue b0 and b1 to the current next frame */
- to_next[0] = bi0 = from[0];
- to_next[1] = bi1 = from[1];
- from += 2;
- to_next += 2;
- n_left_from -= 2;
- n_left_to_next -= 2;
-
- b0 = vlib_get_buffer (vm, bi0);
- b1 = vlib_get_buffer (vm, bi1);
-
- next0 = SNAT_IN2OUT_NEXT_LOOKUP;
- next1 = SNAT_IN2OUT_NEXT_LOOKUP;
-
- ip0 = vlib_buffer_get_current (b0);
- udp0 = ip4_next_header (ip0);
- tcp0 = (tcp_header_t *) udp0;
-
- sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
-
- if (PREDICT_FALSE(ip0->ttl == 1))
- {
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
- icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
- ICMP4_time_exceeded_ttl_exceeded_in_transit,
- 0);
- next0 = SNAT_IN2OUT_NEXT_ICMP_ERROR;
- goto trace0;
- }
-
- proto0 = ip_proto_to_snat_proto (ip0->protocol);
-
- if (PREDICT_FALSE(proto0 == SNAT_PROTOCOL_ICMP))
- {
- rx_fib_index0 = ip4_fib_table_get_index_for_sw_if_index(sw_if_index0);
- icmp0 = (icmp46_header_t *) udp0;
-
- next0 = icmp_in2out(sm, b0, ip0, icmp0, sw_if_index0,
- rx_fib_index0, node, next0, thread_index,
- &ses0, &dm0);
- goto trace0;
- }
-
- dm0 = snat_det_map_by_user(sm, &ip0->src_address);
- if (PREDICT_FALSE(!dm0))
- {
- clib_warning("no match for internal host %U",
- format_ip4_address, &ip0->src_address);
- next0 = SNAT_IN2OUT_NEXT_DROP;
- b0->error = node->errors[SNAT_IN2OUT_ERROR_NO_TRANSLATION];
- goto trace0;
- }
-
- snat_det_forward(dm0, &ip0->src_address, &new_addr0, &lo_port0);
-
- key0.ext_host_addr = ip0->dst_address;
- key0.ext_host_port = tcp0->dst;
-
- ses0 = snat_det_find_ses_by_in(dm0, &ip0->src_address, tcp0->src, key0);
- if (PREDICT_FALSE(!ses0))
- {
- for (i0 = 0; i0 < dm0->ports_per_host; i0++)
- {
- key0.out_port = clib_host_to_net_u16 (lo_port0 +
- ((i0 + clib_net_to_host_u16 (tcp0->src)) % dm0->ports_per_host));
-
- if (snat_det_get_ses_by_out (dm0, &ip0->src_address, key0.as_u64))
- continue;
-
- ses0 = snat_det_ses_create(dm0, &ip0->src_address, tcp0->src, &key0);
- break;
- }
- if (PREDICT_FALSE(!ses0))
- {
- /* too many sessions for user, send ICMP error packet */
-
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
- icmp4_error_set_vnet_buffer (b0, ICMP4_destination_unreachable,
- ICMP4_destination_unreachable_destination_unreachable_host,
- 0);
- next0 = SNAT_IN2OUT_NEXT_ICMP_ERROR;
- goto trace0;
- }
- }
-
- new_port0 = ses0->out.out_port;
-
- old_addr0.as_u32 = ip0->src_address.as_u32;
- ip0->src_address.as_u32 = new_addr0.as_u32;
- vnet_buffer(b0)->sw_if_index[VLIB_TX] = sm->outside_fib_index;
-
- sum0 = ip0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0.as_u32, new_addr0.as_u32,
- ip4_header_t,
- src_address /* changed member */);
- ip0->checksum = ip_csum_fold (sum0);
-
- if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP))
- {
- if (tcp0->flags & TCP_FLAG_SYN)
- ses0->state = SNAT_SESSION_TCP_SYN_SENT;
- else if (tcp0->flags & TCP_FLAG_ACK && ses0->state == SNAT_SESSION_TCP_SYN_SENT)
- ses0->state = SNAT_SESSION_TCP_ESTABLISHED;
- else if (tcp0->flags & TCP_FLAG_FIN && ses0->state == SNAT_SESSION_TCP_ESTABLISHED)
- ses0->state = SNAT_SESSION_TCP_FIN_WAIT;
- else if (tcp0->flags & TCP_FLAG_ACK && ses0->state == SNAT_SESSION_TCP_FIN_WAIT)
- snat_det_ses_close(dm0, ses0);
- else if (tcp0->flags & TCP_FLAG_FIN && ses0->state == SNAT_SESSION_TCP_CLOSE_WAIT)
- ses0->state = SNAT_SESSION_TCP_LAST_ACK;
- else if (tcp0->flags == 0 && ses0->state == SNAT_SESSION_UNKNOWN)
- ses0->state = SNAT_SESSION_TCP_ESTABLISHED;
-
- old_port0 = tcp0->src;
- tcp0->src = new_port0;
-
- sum0 = tcp0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0.as_u32, new_addr0.as_u32,
- ip4_header_t,
- dst_address /* changed member */);
- sum0 = ip_csum_update (sum0, old_port0, new_port0,
- ip4_header_t /* cheat */,
- length /* changed member */);
- tcp0->checksum = ip_csum_fold(sum0);
- }
- else
- {
- ses0->state = SNAT_SESSION_UDP_ACTIVE;
- old_port0 = udp0->src_port;
- udp0->src_port = new_port0;
- udp0->checksum = 0;
- }
-
- switch(ses0->state)
- {
- case SNAT_SESSION_UDP_ACTIVE:
- ses0->expire = now + sm->udp_timeout;
- break;
- case SNAT_SESSION_TCP_SYN_SENT:
- case SNAT_SESSION_TCP_FIN_WAIT:
- case SNAT_SESSION_TCP_CLOSE_WAIT:
- case SNAT_SESSION_TCP_LAST_ACK:
- ses0->expire = now + sm->tcp_transitory_timeout;
- break;
- case SNAT_SESSION_TCP_ESTABLISHED:
- ses0->expire = now + sm->tcp_established_timeout;
- break;
- }
-
- trace0:
- if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b0->flags & VLIB_BUFFER_IS_TRACED)))
- {
- snat_in2out_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->is_slow_path = 0;
- t->sw_if_index = sw_if_index0;
- t->next_index = next0;
- t->session_index = ~0;
- if (ses0)
- t->session_index = ses0 - dm0->sessions;
- }
-
- pkts_processed += next0 != SNAT_IN2OUT_NEXT_DROP;
-
- ip1 = vlib_buffer_get_current (b1);
- udp1 = ip4_next_header (ip1);
- tcp1 = (tcp_header_t *) udp1;
-
- sw_if_index1 = vnet_buffer(b1)->sw_if_index[VLIB_RX];
-
- if (PREDICT_FALSE(ip1->ttl == 1))
- {
- vnet_buffer (b1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
- icmp4_error_set_vnet_buffer (b1, ICMP4_time_exceeded,
- ICMP4_time_exceeded_ttl_exceeded_in_transit,
- 0);
- next1 = SNAT_IN2OUT_NEXT_ICMP_ERROR;
- goto trace1;
- }
-
- proto1 = ip_proto_to_snat_proto (ip1->protocol);
-
- if (PREDICT_FALSE(proto1 == SNAT_PROTOCOL_ICMP))
- {
- rx_fib_index1 = ip4_fib_table_get_index_for_sw_if_index(sw_if_index1);
- icmp1 = (icmp46_header_t *) udp1;
-
- next1 = icmp_in2out(sm, b1, ip1, icmp1, sw_if_index1,
- rx_fib_index1, node, next1, thread_index,
- &ses1, &dm1);
- goto trace1;
- }
-
- dm1 = snat_det_map_by_user(sm, &ip1->src_address);
- if (PREDICT_FALSE(!dm1))
- {
- clib_warning("no match for internal host %U",
- format_ip4_address, &ip0->src_address);
- next1 = SNAT_IN2OUT_NEXT_DROP;
- b1->error = node->errors[SNAT_IN2OUT_ERROR_NO_TRANSLATION];
- goto trace1;
- }
-
- snat_det_forward(dm1, &ip1->src_address, &new_addr1, &lo_port1);
-
- key1.ext_host_addr = ip1->dst_address;
- key1.ext_host_port = tcp1->dst;
-
- ses1 = snat_det_find_ses_by_in(dm1, &ip1->src_address, tcp1->src, key1);
- if (PREDICT_FALSE(!ses1))
- {
- for (i1 = 0; i1 < dm1->ports_per_host; i1++)
- {
- key1.out_port = clib_host_to_net_u16 (lo_port1 +
- ((i1 + clib_net_to_host_u16 (tcp1->src)) % dm1->ports_per_host));
-
- if (snat_det_get_ses_by_out (dm1, &ip1->src_address, key1.as_u64))
- continue;
-
- ses1 = snat_det_ses_create(dm1, &ip1->src_address, tcp1->src, &key1);
- break;
- }
- if (PREDICT_FALSE(!ses1))
- {
- /* too many sessions for user, send ICMP error packet */
-
- vnet_buffer (b1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
- icmp4_error_set_vnet_buffer (b1, ICMP4_destination_unreachable,
- ICMP4_destination_unreachable_destination_unreachable_host,
- 0);
- next1 = SNAT_IN2OUT_NEXT_ICMP_ERROR;
- goto trace1;
- }
- }
-
- new_port1 = ses1->out.out_port;
-
- old_addr1.as_u32 = ip1->src_address.as_u32;
- ip1->src_address.as_u32 = new_addr1.as_u32;
- vnet_buffer(b1)->sw_if_index[VLIB_TX] = sm->outside_fib_index;
-
- sum1 = ip1->checksum;
- sum1 = ip_csum_update (sum1, old_addr1.as_u32, new_addr1.as_u32,
- ip4_header_t,
- src_address /* changed member */);
- ip1->checksum = ip_csum_fold (sum1);
-
- if (PREDICT_TRUE(proto1 == SNAT_PROTOCOL_TCP))
- {
- if (tcp1->flags & TCP_FLAG_SYN)
- ses1->state = SNAT_SESSION_TCP_SYN_SENT;
- else if (tcp1->flags & TCP_FLAG_ACK && ses1->state == SNAT_SESSION_TCP_SYN_SENT)
- ses1->state = SNAT_SESSION_TCP_ESTABLISHED;
- else if (tcp1->flags & TCP_FLAG_FIN && ses1->state == SNAT_SESSION_TCP_ESTABLISHED)
- ses1->state = SNAT_SESSION_TCP_FIN_WAIT;
- else if (tcp1->flags & TCP_FLAG_ACK && ses1->state == SNAT_SESSION_TCP_FIN_WAIT)
- snat_det_ses_close(dm1, ses1);
- else if (tcp1->flags & TCP_FLAG_FIN && ses1->state == SNAT_SESSION_TCP_CLOSE_WAIT)
- ses1->state = SNAT_SESSION_TCP_LAST_ACK;
- else if (tcp1->flags == 0 && ses1->state == SNAT_SESSION_UNKNOWN)
- ses1->state = SNAT_SESSION_TCP_ESTABLISHED;
-
- old_port1 = tcp1->src;
- tcp1->src = new_port1;
-
- sum1 = tcp1->checksum;
- sum1 = ip_csum_update (sum1, old_addr1.as_u32, new_addr1.as_u32,
- ip4_header_t,
- dst_address /* changed member */);
- sum1 = ip_csum_update (sum1, old_port1, new_port1,
- ip4_header_t /* cheat */,
- length /* changed member */);
- tcp1->checksum = ip_csum_fold(sum1);
- }
- else
- {
- ses1->state = SNAT_SESSION_UDP_ACTIVE;
- old_port1 = udp1->src_port;
- udp1->src_port = new_port1;
- udp1->checksum = 0;
- }
-
- switch(ses1->state)
- {
- case SNAT_SESSION_UDP_ACTIVE:
- ses1->expire = now + sm->udp_timeout;
- break;
- case SNAT_SESSION_TCP_SYN_SENT:
- case SNAT_SESSION_TCP_FIN_WAIT:
- case SNAT_SESSION_TCP_CLOSE_WAIT:
- case SNAT_SESSION_TCP_LAST_ACK:
- ses1->expire = now + sm->tcp_transitory_timeout;
- break;
- case SNAT_SESSION_TCP_ESTABLISHED:
- ses1->expire = now + sm->tcp_established_timeout;
- break;
- }
-
- trace1:
- if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b1->flags & VLIB_BUFFER_IS_TRACED)))
- {
- snat_in2out_trace_t *t =
- vlib_add_trace (vm, node, b1, sizeof (*t));
- t->is_slow_path = 0;
- t->sw_if_index = sw_if_index1;
- t->next_index = next1;
- t->session_index = ~0;
- if (ses1)
- t->session_index = ses1 - dm1->sessions;
- }
-
- pkts_processed += next1 != SNAT_IN2OUT_NEXT_DROP;
-
- /* verify speculative enqueues, maybe switch current next frame */
- vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
- to_next, n_left_to_next,
- bi0, bi1, next0, next1);
- }
-
- while (n_left_from > 0 && n_left_to_next > 0)
- {
- u32 bi0;
- vlib_buffer_t * b0;
- u32 next0;
- u32 sw_if_index0;
- ip4_header_t * ip0;
- ip_csum_t sum0;
- ip4_address_t new_addr0, old_addr0;
- u16 old_port0, new_port0, lo_port0, i0;
- udp_header_t * udp0;
- tcp_header_t * tcp0;
- u32 proto0;
- snat_det_out_key_t key0;
- snat_det_map_t * dm0;
- snat_det_session_t * ses0 = 0;
- u32 rx_fib_index0;
- icmp46_header_t * icmp0;
-
- /* speculatively enqueue b0 to the current next frame */
- bi0 = from[0];
- to_next[0] = bi0;
- from += 1;
- to_next += 1;
- n_left_from -= 1;
- n_left_to_next -= 1;
-
- b0 = vlib_get_buffer (vm, bi0);
- next0 = SNAT_IN2OUT_NEXT_LOOKUP;
-
- ip0 = vlib_buffer_get_current (b0);
- udp0 = ip4_next_header (ip0);
- tcp0 = (tcp_header_t *) udp0;
-
- sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
-
- if (PREDICT_FALSE(ip0->ttl == 1))
- {
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
- icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
- ICMP4_time_exceeded_ttl_exceeded_in_transit,
- 0);
- next0 = SNAT_IN2OUT_NEXT_ICMP_ERROR;
- goto trace00;
- }
-
- proto0 = ip_proto_to_snat_proto (ip0->protocol);
-
- if (PREDICT_FALSE(proto0 == SNAT_PROTOCOL_ICMP))
- {
- rx_fib_index0 = ip4_fib_table_get_index_for_sw_if_index(sw_if_index0);
- icmp0 = (icmp46_header_t *) udp0;
-
- next0 = icmp_in2out(sm, b0, ip0, icmp0, sw_if_index0,
- rx_fib_index0, node, next0, thread_index,
- &ses0, &dm0);
- goto trace00;
- }
-
- dm0 = snat_det_map_by_user(sm, &ip0->src_address);
- if (PREDICT_FALSE(!dm0))
- {
- clib_warning("no match for internal host %U",
- format_ip4_address, &ip0->src_address);
- next0 = SNAT_IN2OUT_NEXT_DROP;
- b0->error = node->errors[SNAT_IN2OUT_ERROR_NO_TRANSLATION];
- goto trace00;
- }
-
- snat_det_forward(dm0, &ip0->src_address, &new_addr0, &lo_port0);
-
- key0.ext_host_addr = ip0->dst_address;
- key0.ext_host_port = tcp0->dst;
-
- ses0 = snat_det_find_ses_by_in(dm0, &ip0->src_address, tcp0->src, key0);
- if (PREDICT_FALSE(!ses0))
- {
- for (i0 = 0; i0 < dm0->ports_per_host; i0++)
- {
- key0.out_port = clib_host_to_net_u16 (lo_port0 +
- ((i0 + clib_net_to_host_u16 (tcp0->src)) % dm0->ports_per_host));
-
- if (snat_det_get_ses_by_out (dm0, &ip0->src_address, key0.as_u64))
- continue;
-
- ses0 = snat_det_ses_create(dm0, &ip0->src_address, tcp0->src, &key0);
- break;
- }
- if (PREDICT_FALSE(!ses0))
- {
- /* too many sessions for user, send ICMP error packet */
-
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
- icmp4_error_set_vnet_buffer (b0, ICMP4_destination_unreachable,
- ICMP4_destination_unreachable_destination_unreachable_host,
- 0);
- next0 = SNAT_IN2OUT_NEXT_ICMP_ERROR;
- goto trace00;
- }
- }
-
- new_port0 = ses0->out.out_port;
-
- old_addr0.as_u32 = ip0->src_address.as_u32;
- ip0->src_address.as_u32 = new_addr0.as_u32;
- vnet_buffer(b0)->sw_if_index[VLIB_TX] = sm->outside_fib_index;
-
- sum0 = ip0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0.as_u32, new_addr0.as_u32,
- ip4_header_t,
- src_address /* changed member */);
- ip0->checksum = ip_csum_fold (sum0);
-
- if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP))
- {
- if (tcp0->flags & TCP_FLAG_SYN)
- ses0->state = SNAT_SESSION_TCP_SYN_SENT;
- else if (tcp0->flags & TCP_FLAG_ACK && ses0->state == SNAT_SESSION_TCP_SYN_SENT)
- ses0->state = SNAT_SESSION_TCP_ESTABLISHED;
- else if (tcp0->flags & TCP_FLAG_FIN && ses0->state == SNAT_SESSION_TCP_ESTABLISHED)
- ses0->state = SNAT_SESSION_TCP_FIN_WAIT;
- else if (tcp0->flags & TCP_FLAG_ACK && ses0->state == SNAT_SESSION_TCP_FIN_WAIT)
- snat_det_ses_close(dm0, ses0);
- else if (tcp0->flags & TCP_FLAG_FIN && ses0->state == SNAT_SESSION_TCP_CLOSE_WAIT)
- ses0->state = SNAT_SESSION_TCP_LAST_ACK;
- else if (tcp0->flags == 0 && ses0->state == SNAT_SESSION_UNKNOWN)
- ses0->state = SNAT_SESSION_TCP_ESTABLISHED;
-
- old_port0 = tcp0->src;
- tcp0->src = new_port0;
-
- sum0 = tcp0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0.as_u32, new_addr0.as_u32,
- ip4_header_t,
- dst_address /* changed member */);
- sum0 = ip_csum_update (sum0, old_port0, new_port0,
- ip4_header_t /* cheat */,
- length /* changed member */);
- tcp0->checksum = ip_csum_fold(sum0);
- }
- else
- {
- ses0->state = SNAT_SESSION_UDP_ACTIVE;
- old_port0 = udp0->src_port;
- udp0->src_port = new_port0;
- udp0->checksum = 0;
- }
-
- switch(ses0->state)
- {
- case SNAT_SESSION_UDP_ACTIVE:
- ses0->expire = now + sm->udp_timeout;
- break;
- case SNAT_SESSION_TCP_SYN_SENT:
- case SNAT_SESSION_TCP_FIN_WAIT:
- case SNAT_SESSION_TCP_CLOSE_WAIT:
- case SNAT_SESSION_TCP_LAST_ACK:
- ses0->expire = now + sm->tcp_transitory_timeout;
- break;
- case SNAT_SESSION_TCP_ESTABLISHED:
- ses0->expire = now + sm->tcp_established_timeout;
- break;
- }
-
- trace00:
- if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b0->flags & VLIB_BUFFER_IS_TRACED)))
- {
- snat_in2out_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->is_slow_path = 0;
- t->sw_if_index = sw_if_index0;
- t->next_index = next0;
- t->session_index = ~0;
- if (ses0)
- t->session_index = ses0 - dm0->sessions;
- }
-
- pkts_processed += next0 != SNAT_IN2OUT_NEXT_DROP;
-
- /* verify speculative enqueue, maybe switch current next frame */
- vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
- to_next, n_left_to_next,
- bi0, next0);
- }
-
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
- }
-
- vlib_node_increment_counter (vm, snat_det_in2out_node.index,
- SNAT_IN2OUT_ERROR_IN2OUT_PACKETS,
- pkts_processed);
- return frame->n_vectors;
-}
-
-VLIB_REGISTER_NODE (snat_det_in2out_node) = {
- .function = snat_det_in2out_node_fn,
- .name = "nat44-det-in2out",
- .vector_size = sizeof (u32),
- .format_trace = format_snat_in2out_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
-
- .n_errors = ARRAY_LEN(snat_in2out_error_strings),
- .error_strings = snat_in2out_error_strings,
-
- .runtime_data_bytes = sizeof (snat_runtime_t),
-
- .n_next_nodes = 3,
-
- /* edit / add dispositions here */
- .next_nodes = {
- [SNAT_IN2OUT_NEXT_DROP] = "error-drop",
- [SNAT_IN2OUT_NEXT_LOOKUP] = "ip4-lookup",
- [SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
- },
-};
-
-VLIB_NODE_FUNCTION_MULTIARCH (snat_det_in2out_node, snat_det_in2out_node_fn);
-
-/**
- * Get address and port values to be used for ICMP packet translation
- * and create session if needed
- *
- * @param[in,out] sm NAT main
- * @param[in,out] node NAT node runtime
- * @param[in] thread_index thread index
- * @param[in,out] b0 buffer containing packet to be translated
- * @param[out] p_proto protocol used for matching
- * @param[out] p_value address and port after NAT translation
- * @param[out] p_dont_translate if packet should not be translated
- * @param d optional parameter
- * @param e optional parameter
- */
-u32 icmp_match_in2out_det(snat_main_t *sm, vlib_node_runtime_t *node,
- u32 thread_index, vlib_buffer_t *b0, u8 *p_proto,
- snat_session_key_t *p_value,
- u8 *p_dont_translate, void *d, void *e)
-{
- ip4_header_t *ip0;
- icmp46_header_t *icmp0;
- u32 sw_if_index0;
- u32 rx_fib_index0;
- u8 protocol;
- snat_det_out_key_t key0;
- u8 dont_translate = 0;
- u32 next0 = ~0;
- icmp_echo_header_t *echo0, *inner_echo0 = 0;
- ip4_header_t *inner_ip0;
- void *l4_header = 0;
- icmp46_header_t *inner_icmp0;
- snat_det_map_t * dm0 = 0;
- ip4_address_t new_addr0;
- u16 lo_port0, i0;
- snat_det_session_t * ses0 = 0;
- ip4_address_t in_addr;
- u16 in_port;
-
- ip0 = vlib_buffer_get_current (b0);
- icmp0 = (icmp46_header_t *) ip4_next_header (ip0);
- echo0 = (icmp_echo_header_t *)(icmp0+1);
- sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
- rx_fib_index0 = ip4_fib_table_get_index_for_sw_if_index (sw_if_index0);
-
- if (!icmp_is_error_message (icmp0))
- {
- protocol = SNAT_PROTOCOL_ICMP;
- in_addr = ip0->src_address;
- in_port = echo0->identifier;
- }
- else
- {
- inner_ip0 = (ip4_header_t *)(echo0+1);
- l4_header = ip4_next_header (inner_ip0);
- protocol = ip_proto_to_snat_proto (inner_ip0->protocol);
- in_addr = inner_ip0->dst_address;
- switch (protocol)
- {
- case SNAT_PROTOCOL_ICMP:
- inner_icmp0 = (icmp46_header_t*)l4_header;
- inner_echo0 = (icmp_echo_header_t *)(inner_icmp0+1);
- in_port = inner_echo0->identifier;
- break;
- case SNAT_PROTOCOL_UDP:
- case SNAT_PROTOCOL_TCP:
- in_port = ((tcp_udp_header_t*)l4_header)->dst_port;
- break;
- default:
- b0->error = node->errors[SNAT_IN2OUT_ERROR_UNSUPPORTED_PROTOCOL];
- next0 = SNAT_IN2OUT_NEXT_DROP;
- goto out;
- }
- }
-
- dm0 = snat_det_map_by_user(sm, &in_addr);
- if (PREDICT_FALSE(!dm0))
- {
- clib_warning("no match for internal host %U",
- format_ip4_address, &in_addr);
- if (PREDICT_FALSE(snat_not_translate_fast(sm, node, sw_if_index0, ip0,
- IP_PROTOCOL_ICMP, rx_fib_index0)))
- {
- dont_translate = 1;
- goto out;
- }
- next0 = SNAT_IN2OUT_NEXT_DROP;
- b0->error = node->errors[SNAT_IN2OUT_ERROR_NO_TRANSLATION];
- goto out;
- }
-
- snat_det_forward(dm0, &in_addr, &new_addr0, &lo_port0);
-
- key0.ext_host_addr = ip0->dst_address;
- key0.ext_host_port = 0;
-
- ses0 = snat_det_find_ses_by_in(dm0, &in_addr, in_port, key0);
- if (PREDICT_FALSE(!ses0))
- {
- if (PREDICT_FALSE(snat_not_translate_fast(sm, node, sw_if_index0, ip0,
- IP_PROTOCOL_ICMP, rx_fib_index0)))
- {
- dont_translate = 1;
- goto out;
- }
- if (icmp0->type != ICMP4_echo_request)
- {
- b0->error = node->errors[SNAT_IN2OUT_ERROR_BAD_ICMP_TYPE];
- next0 = SNAT_IN2OUT_NEXT_DROP;
- goto out;
- }
- for (i0 = 0; i0 < dm0->ports_per_host; i0++)
- {
- key0.out_port = clib_host_to_net_u16 (lo_port0 +
- ((i0 + clib_net_to_host_u16 (echo0->identifier)) % dm0->ports_per_host));
-
- if (snat_det_get_ses_by_out (dm0, &in_addr, key0.as_u64))
- continue;
-
- ses0 = snat_det_ses_create(dm0, &in_addr, echo0->identifier, &key0);
- break;
- }
- if (PREDICT_FALSE(!ses0))
- {
- next0 = SNAT_IN2OUT_NEXT_DROP;
- b0->error = node->errors[SNAT_IN2OUT_ERROR_OUT_OF_PORTS];
- goto out;
- }
- }
-
- if (PREDICT_FALSE(icmp0->type != ICMP4_echo_request &&
- !icmp_is_error_message (icmp0)))
- {
- b0->error = node->errors[SNAT_IN2OUT_ERROR_BAD_ICMP_TYPE];
- next0 = SNAT_IN2OUT_NEXT_DROP;
- goto out;
- }
-
- u32 now = (u32) vlib_time_now (sm->vlib_main);
-
- ses0->state = SNAT_SESSION_ICMP_ACTIVE;
- ses0->expire = now + sm->icmp_timeout;
-
-out:
- *p_proto = protocol;
- if (ses0)
- {
- p_value->addr = new_addr0;
- p_value->fib_index = sm->outside_fib_index;
- p_value->port = ses0->out.out_port;
- }
- *p_dont_translate = dont_translate;
- if (d)
- *(snat_det_session_t**)d = ses0;
- if (e)
- *(snat_det_map_t**)e = dm0;
- return next0;
-}
-
-/**********************/
-/*** worker handoff ***/
-/**********************/
-static inline uword
-snat_in2out_worker_handoff_fn_inline (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame,
- u8 is_output)
-{
- snat_main_t *sm = &snat_main;
- vlib_thread_main_t *tm = vlib_get_thread_main ();
- u32 n_left_from, *from, *to_next = 0;
- 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 ();
- u32 fq_index;
- u32 to_node_index;
-
- ASSERT (vec_len (sm->workers));
-
- if (is_output)
- {
- fq_index = sm->fq_in2out_output_index;
- to_node_index = sm->in2out_output_node_index;
- }
- else
- {
- fq_index = sm->fq_in2out_index;
- to_node_index = sm->in2out_node_index;
- }
-
- if (PREDICT_FALSE (handoff_queue_elt_by_worker_index == 0))
- {
- vec_validate (handoff_queue_elt_by_worker_index, tm->n_vlib_mains - 1);
-
- vec_validate_init_empty (congested_handoff_queue_by_worker_index,
- 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;
+ n_left_from -= 1;
+ n_left_to_next -= 1;
- while (n_left_from > 0)
- {
- u32 bi0;
- vlib_buffer_t *b0;
- u32 sw_if_index0;
- u32 rx_fib_index0;
- ip4_header_t * ip0;
- u8 do_handoff;
+ b0 = vlib_get_buffer (vm, bi0);
+ next0 = SNAT_IN2OUT_NEXT_LOOKUP;
- bi0 = from[0];
- from += 1;
- n_left_from -= 1;
+ if (is_output_feature)
+ iph_offset0 = vnet_buffer (b0)->ip.save_rewrite_length;
- b0 = vlib_get_buffer (vm, bi0);
+ ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) +
+ iph_offset0);
- sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
- rx_fib_index0 = ip4_fib_table_get_index_for_sw_if_index(sw_if_index0);
+ udp0 = ip4_next_header (ip0);
+ tcp0 = (tcp_header_t *) udp0;
+ icmp0 = (icmp46_header_t *) udp0;
- ip0 = vlib_buffer_get_current (b0);
+ 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);
- next_worker_index = sm->worker_in2out_cb(ip0, rx_fib_index0);
+ if (PREDICT_FALSE (ip0->ttl == 1))
+ {
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
+ icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
+ ICMP4_time_exceeded_ttl_exceeded_in_transit,
+ 0);
+ next0 = SNAT_IN2OUT_NEXT_ICMP_ERROR;
+ goto trace0;
+ }
- if (PREDICT_FALSE (next_worker_index != thread_index))
- {
- do_handoff = 1;
+ proto0 = ip_proto_to_snat_proto (ip0->protocol);
- if (next_worker_index != current_worker_index)
- {
- if (hf)
- hf->n_vectors = VLIB_FRAME_SIZE - n_left_to_next_worker;
+ /* Next configured feature, probably ip4-lookup */
+ if (is_slow_path)
+ {
+ if (PREDICT_FALSE (proto0 == ~0))
+ {
+ if (nat_in2out_sm_unknown_proto
+ (sm, b0, ip0, rx_fib_index0))
+ {
+ next0 = SNAT_IN2OUT_NEXT_DROP;
+ b0->error =
+ node->errors[SNAT_IN2OUT_ERROR_UNSUPPORTED_PROTOCOL];
+ }
+ other_packets++;
+ goto trace0;
+ }
+
+ if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
+ {
+ next0 = icmp_in2out_slow_path
+ (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
+ next0, now, thread_index, &s0);
+ icmp_packets++;
+ goto trace0;
+ }
+ }
+ else
+ {
+ if (PREDICT_FALSE (proto0 == ~0))
+ {
+ next0 = SNAT_IN2OUT_NEXT_SLOW_PATH;
+ goto trace0;
+ }
+
+ if (ip4_is_fragment (ip0))
+ {
+ next0 = SNAT_IN2OUT_NEXT_REASS;
+ fragments++;
+ goto trace0;
+ }
+
+ if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
+ {
+ next0 = SNAT_IN2OUT_NEXT_SLOW_PATH;
+ goto trace0;
+ }
+ }
- hf = vlib_get_worker_handoff_queue_elt (fq_index,
- next_worker_index,
- handoff_queue_elt_by_worker_index);
+ key0.addr = ip0->src_address;
+ key0.port = udp0->src_port;
+ key0.protocol = proto0;
+ key0.fib_index = rx_fib_index0;
- 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;
- }
+ kv0.key = key0.as_u64;
- /* enqueue to correct worker thread */
- to_next_worker[0] = bi0;
- to_next_worker++;
- n_left_to_next_worker--;
+ if (clib_bihash_search_8_8
+ (&sm->per_thread_data[thread_index].in2out, &kv0, &value0))
+ {
+ if (is_slow_path)
+ {
+ if (is_output_feature)
+ {
+ if (PREDICT_FALSE (nat_not_translate_output_feature (sm,
+ ip0,
+ proto0,
+ udp0->src_port,
+ udp0->dst_port,
+ thread_index,
+ sw_if_index0)))
+ goto trace0;
+ }
+ else
+ {
+ if (PREDICT_FALSE
+ (snat_not_translate
+ (sm, node, sw_if_index0, ip0, proto0,
+ rx_fib_index0, thread_index)))
+ goto trace0;
+ }
+
+ next0 = slow_path (sm, b0, ip0, rx_fib_index0, &key0,
+ &s0, node, next0, thread_index, now);
+
+ if (PREDICT_FALSE (next0 == SNAT_IN2OUT_NEXT_DROP))
+ goto trace0;
+
+ if (PREDICT_FALSE (!s0))
+ goto trace0;
+ }
+ else
+ {
+ next0 = SNAT_IN2OUT_NEXT_SLOW_PATH;
+ goto trace0;
+ }
+ }
+ else
+ s0 =
+ pool_elt_at_index (sm->per_thread_data[thread_index].sessions,
+ value0.value);
- if (n_left_to_next_worker == 0)
- {
- hf->n_vectors = VLIB_FRAME_SIZE;
- vlib_put_frame_queue_elt (hf);
- current_worker_index = ~0;
- handoff_queue_elt_by_worker_index[next_worker_index] = 0;
- hf = 0;
- }
- }
- else
- {
- do_handoff = 0;
- /* if this is 1st frame */
- if (!f)
- {
- f = vlib_get_frame_to_node (vm, to_node_index);
- to_next = vlib_frame_vector_args (f);
- }
+ b0->flags |= VNET_BUFFER_F_IS_NATED;
- to_next[0] = bi0;
- to_next += 1;
- f->n_vectors++;
- }
+ old_addr0 = ip0->src_address.as_u32;
+ ip0->src_address = s0->out2in.addr;
+ new_addr0 = ip0->src_address.as_u32;
+ if (!is_output_feature)
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index;
- if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b0->flags & VLIB_BUFFER_IS_TRACED)))
- {
- snat_in2out_worker_handoff_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->next_worker_index = next_worker_index;
- t->do_handoff = do_handoff;
- }
- }
+ sum0 = ip0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
+ ip4_header_t,
+ src_address /* changed member */ );
+ ip0->checksum = ip_csum_fold (sum0);
- if (f)
- vlib_put_frame_to_node (vm, to_node_index, f);
+ if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
+ {
+ old_port0 = tcp0->src_port;
+ tcp0->src_port = s0->out2in.port;
+ new_port0 = tcp0->src_port;
+
+ sum0 = tcp0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
+ ip4_header_t,
+ dst_address /* changed member */ );
+ sum0 = ip_csum_update (sum0, old_port0, new_port0,
+ ip4_header_t /* cheat */ ,
+ length /* changed member */ );
+ mss_clamping (sm, tcp0, &sum0);
+ tcp0->checksum = ip_csum_fold (sum0);
+ tcp_packets++;
+ }
+ else
+ {
+ old_port0 = udp0->src_port;
+ udp0->src_port = s0->out2in.port;
+ udp0->checksum = 0;
+ udp_packets++;
+ }
- if (hf)
- hf->n_vectors = VLIB_FRAME_SIZE - n_left_to_next_worker;
+ /* 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);
- /* Ship frames to the worker nodes */
- for (i = 0; i < vec_len (handoff_queue_elt_by_worker_index); i++)
- {
- if (handoff_queue_elt_by_worker_index[i])
- {
- hf = handoff_queue_elt_by_worker_index[i];
- /*
- * It works better to let the handoff node
- * rate-adapt, always ship the handoff queue element.
- */
- if (1 || hf->n_vectors == hf->last_n_vectors)
+ trace0:
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b0->flags & VLIB_BUFFER_IS_TRACED)))
{
- vlib_put_frame_queue_elt (hf);
- handoff_queue_elt_by_worker_index[i] = 0;
+ snat_in2out_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->is_slow_path = is_slow_path;
+ t->sw_if_index = sw_if_index0;
+ t->next_index = next0;
+ t->session_index = ~0;
+ if (s0)
+ t->session_index =
+ s0 - sm->per_thread_data[thread_index].sessions;
}
- else
- hf->last_n_vectors = hf->n_vectors;
+
+ pkts_processed += next0 == SNAT_IN2OUT_NEXT_LOOKUP;
+
+ /* 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);
}
- congested_handoff_queue_by_worker_index[i] =
- (vlib_frame_queue_t *) (~0);
+
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
}
- hf = 0;
- current_worker_index = ~0;
+
+ vlib_node_increment_counter (vm, stats_node_index,
+ SNAT_IN2OUT_ERROR_IN2OUT_PACKETS,
+ pkts_processed);
+ vlib_node_increment_counter (vm, stats_node_index,
+ SNAT_IN2OUT_ERROR_TCP_PACKETS, tcp_packets);
+ vlib_node_increment_counter (vm, stats_node_index,
+ SNAT_IN2OUT_ERROR_UDP_PACKETS, tcp_packets);
+ vlib_node_increment_counter (vm, stats_node_index,
+ SNAT_IN2OUT_ERROR_ICMP_PACKETS, icmp_packets);
+ vlib_node_increment_counter (vm, stats_node_index,
+ SNAT_IN2OUT_ERROR_OTHER_PACKETS,
+ other_packets);
+ vlib_node_increment_counter (vm, stats_node_index,
+ SNAT_IN2OUT_ERROR_FRAGMENTS, fragments);
+
return frame->n_vectors;
}
-static uword
-snat_in2out_worker_handoff_fn (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
+VLIB_NODE_FN (snat_in2out_node) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
{
- return snat_in2out_worker_handoff_fn_inline (vm, node, frame, 0);
+ return snat_in2out_node_fn_inline (vm, node, frame, 0 /* is_slow_path */ ,
+ 0);
}
-VLIB_REGISTER_NODE (snat_in2out_worker_handoff_node) = {
- .function = snat_in2out_worker_handoff_fn,
- .name = "nat44-in2out-worker-handoff",
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (snat_in2out_node) = {
+ .name = "nat44-in2out",
.vector_size = sizeof (u32),
- .format_trace = format_snat_in2out_worker_handoff_trace,
+ .format_trace = format_snat_in2out_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
- .n_next_nodes = 1,
+ .n_errors = ARRAY_LEN(snat_in2out_error_strings),
+ .error_strings = snat_in2out_error_strings,
+
+ .runtime_data_bytes = sizeof (snat_runtime_t),
+ .n_next_nodes = SNAT_IN2OUT_N_NEXT,
+
+ /* edit / add dispositions here */
.next_nodes = {
- [0] = "error-drop",
+ [SNAT_IN2OUT_NEXT_DROP] = "error-drop",
+ [SNAT_IN2OUT_NEXT_LOOKUP] = "ip4-lookup",
+ [SNAT_IN2OUT_NEXT_SLOW_PATH] = "nat44-in2out-slowpath",
+ [SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
+ [SNAT_IN2OUT_NEXT_REASS] = "nat44-in2out-reass",
},
};
+/* *INDENT-ON* */
-VLIB_NODE_FUNCTION_MULTIARCH (snat_in2out_worker_handoff_node,
- snat_in2out_worker_handoff_fn);
-
-static uword
-snat_in2out_output_worker_handoff_fn (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
+VLIB_NODE_FN (snat_in2out_output_node) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
{
- return snat_in2out_worker_handoff_fn_inline (vm, node, frame, 1);
+ return snat_in2out_node_fn_inline (vm, node, frame, 0 /* is_slow_path */ ,
+ 1);
}
-VLIB_REGISTER_NODE (snat_in2out_output_worker_handoff_node) = {
- .function = snat_in2out_output_worker_handoff_fn,
- .name = "nat44-in2out-output-worker-handoff",
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (snat_in2out_output_node) = {
+ .name = "nat44-in2out-output",
.vector_size = sizeof (u32),
- .format_trace = format_snat_in2out_worker_handoff_trace,
+ .format_trace = format_snat_in2out_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
- .n_next_nodes = 1,
+ .n_errors = ARRAY_LEN(snat_in2out_error_strings),
+ .error_strings = snat_in2out_error_strings,
+
+ .runtime_data_bytes = sizeof (snat_runtime_t),
+
+ .n_next_nodes = SNAT_IN2OUT_N_NEXT,
+ /* edit / add dispositions here */
.next_nodes = {
- [0] = "error-drop",
+ [SNAT_IN2OUT_NEXT_DROP] = "error-drop",
+ [SNAT_IN2OUT_NEXT_LOOKUP] = "interface-output",
+ [SNAT_IN2OUT_NEXT_SLOW_PATH] = "nat44-in2out-output-slowpath",
+ [SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
+ [SNAT_IN2OUT_NEXT_REASS] = "nat44-in2out-reass",
},
};
+/* *INDENT-ON* */
-VLIB_NODE_FUNCTION_MULTIARCH (snat_in2out_output_worker_handoff_node,
- snat_in2out_output_worker_handoff_fn);
-
-static_always_inline int
-is_hairpinning (snat_main_t *sm, ip4_address_t * dst_addr)
+VLIB_NODE_FN (snat_in2out_slowpath_node) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
{
- snat_address_t * ap;
- clib_bihash_kv_8_8_t kv, value;
- snat_session_key_t m_key;
-
- vec_foreach (ap, sm->addresses)
- {
- if (ap->addr.as_u32 == dst_addr->as_u32)
- return 1;
- }
-
- m_key.addr.as_u32 = dst_addr->as_u32;
- m_key.fib_index = sm->outside_fib_index;
- m_key.port = 0;
- m_key.protocol = 0;
- kv.key = m_key.as_u64;
- if (!clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value))
- return 1;
-
- return 0;
+ return snat_in2out_node_fn_inline (vm, node, frame, 1 /* is_slow_path */ ,
+ 0);
}
-static uword
-snat_hairpin_dst_fn (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- u32 n_left_from, * from, * to_next;
- snat_in2out_next_t next_index;
- u32 pkts_processed = 0;
- snat_main_t * sm = &snat_main;
-
- from = vlib_frame_vector_args (frame);
- n_left_from = frame->n_vectors;
- next_index = node->cached_next_index;
-
- while (n_left_from > 0)
- {
- u32 n_left_to_next;
-
- vlib_get_next_frame (vm, node, next_index,
- to_next, n_left_to_next);
-
- while (n_left_from > 0 && n_left_to_next > 0)
- {
- u32 bi0;
- vlib_buffer_t * b0;
- u32 next0;
- ip4_header_t * ip0;
- u32 proto0;
-
- /* speculatively enqueue b0 to the current next frame */
- bi0 = from[0];
- to_next[0] = bi0;
- from += 1;
- to_next += 1;
- n_left_from -= 1;
- n_left_to_next -= 1;
-
- b0 = vlib_get_buffer (vm, bi0);
- next0 = SNAT_IN2OUT_NEXT_LOOKUP;
- ip0 = vlib_buffer_get_current (b0);
-
- proto0 = ip_proto_to_snat_proto (ip0->protocol);
-
- vnet_buffer (b0)->snat.flags = 0;
- if (PREDICT_FALSE (is_hairpinning (sm, &ip0->dst_address)))
- {
- if (proto0 == SNAT_PROTOCOL_TCP || proto0 == SNAT_PROTOCOL_UDP)
- {
- udp_header_t * udp0 = ip4_next_header (ip0);
- tcp_header_t * tcp0 = (tcp_header_t *) udp0;
-
- snat_hairpinning (sm, b0, ip0, udp0, tcp0, proto0);
- }
- else if (proto0 == SNAT_PROTOCOL_ICMP)
- {
- icmp46_header_t * icmp0 = ip4_next_header (ip0);
-
- snat_icmp_hairpinning (sm, b0, ip0, icmp0);
- }
- else
- {
- snat_hairpinning_unknown_proto (sm, b0, ip0);
- }
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (snat_in2out_slowpath_node) = {
+ .name = "nat44-in2out-slowpath",
+ .vector_size = sizeof (u32),
+ .format_trace = format_snat_in2out_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
- vnet_buffer (b0)->snat.flags = SNAT_FLAG_HAIRPINNING;
- clib_warning("is hairpinning");
- }
+ .n_errors = ARRAY_LEN(snat_in2out_error_strings),
+ .error_strings = snat_in2out_error_strings,
- pkts_processed += next0 != SNAT_IN2OUT_NEXT_DROP;
+ .runtime_data_bytes = sizeof (snat_runtime_t),
- /* 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);
- }
+ .n_next_nodes = SNAT_IN2OUT_N_NEXT,
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
- }
+ /* edit / add dispositions here */
+ .next_nodes = {
+ [SNAT_IN2OUT_NEXT_DROP] = "error-drop",
+ [SNAT_IN2OUT_NEXT_LOOKUP] = "ip4-lookup",
+ [SNAT_IN2OUT_NEXT_SLOW_PATH] = "nat44-in2out-slowpath",
+ [SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
+ [SNAT_IN2OUT_NEXT_REASS] = "nat44-in2out-reass",
+ },
+};
+/* *INDENT-ON* */
- vlib_node_increment_counter (vm, snat_hairpin_dst_node.index,
- SNAT_IN2OUT_ERROR_IN2OUT_PACKETS,
- pkts_processed);
- return frame->n_vectors;
+VLIB_NODE_FN (snat_in2out_output_slowpath_node) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ return snat_in2out_node_fn_inline (vm, node, frame, 1 /* is_slow_path */ ,
+ 1);
}
-VLIB_REGISTER_NODE (snat_hairpin_dst_node) = {
- .function = snat_hairpin_dst_fn,
- .name = "nat44-hairpin-dst",
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (snat_in2out_output_slowpath_node) = {
+ .name = "nat44-in2out-output-slowpath",
.vector_size = sizeof (u32),
+ .format_trace = format_snat_in2out_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
+
.n_errors = ARRAY_LEN(snat_in2out_error_strings),
.error_strings = snat_in2out_error_strings,
- .n_next_nodes = 2,
+
+ .runtime_data_bytes = sizeof (snat_runtime_t),
+
+ .n_next_nodes = SNAT_IN2OUT_N_NEXT,
+
+ /* edit / add dispositions here */
.next_nodes = {
[SNAT_IN2OUT_NEXT_DROP] = "error-drop",
- [SNAT_IN2OUT_NEXT_LOOKUP] = "ip4-lookup",
+ [SNAT_IN2OUT_NEXT_LOOKUP] = "interface-output",
+ [SNAT_IN2OUT_NEXT_SLOW_PATH] = "nat44-in2out-output-slowpath",
+ [SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
+ [SNAT_IN2OUT_NEXT_REASS] = "nat44-in2out-reass",
},
};
+/* *INDENT-ON* */
-VLIB_NODE_FUNCTION_MULTIARCH (snat_hairpin_dst_node,
- snat_hairpin_dst_fn);
-
-static uword
-snat_hairpin_src_fn (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
+VLIB_NODE_FN (nat44_in2out_reass_node) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
{
- u32 n_left_from, * from, * to_next;
+ u32 n_left_from, *from, *to_next;
snat_in2out_next_t next_index;
- u32 pkts_processed = 0;
+ u32 pkts_processed = 0, cached_fragments = 0;
snat_main_t *sm = &snat_main;
+ f64 now = vlib_time_now (vm);
+ u32 thread_index = vm->thread_index;
+ snat_main_per_thread_data_t *per_thread_data =
+ &sm->per_thread_data[thread_index];
+ u32 *fragments_to_drop = 0;
+ u32 *fragments_to_loopback = 0;
from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
{
u32 n_left_to_next;
- vlib_get_next_frame (vm, node, next_index,
- to_next, n_left_to_next);
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
while (n_left_from > 0 && n_left_to_next > 0)
{
- u32 bi0;
- vlib_buffer_t * b0;
- u32 next0;
-
- /* speculatively enqueue b0 to the current next frame */
+ u32 bi0, sw_if_index0, proto0, rx_fib_index0, new_addr0, old_addr0;
+ vlib_buffer_t *b0;
+ u32 next0;
+ u8 cached0 = 0;
+ ip4_header_t *ip0;
+ nat_reass_ip4_t *reass0;
+ udp_header_t *udp0;
+ tcp_header_t *tcp0;
+ icmp46_header_t *icmp0;
+ snat_session_key_t key0;
+ clib_bihash_kv_8_8_t kv0, value0;
+ snat_session_t *s0 = 0;
+ u16 old_port0, new_port0;
+ ip_csum_t sum0;
+
+ /* speculatively enqueue b0 to the current next frame */
bi0 = from[0];
to_next[0] = bi0;
from += 1;
n_left_to_next -= 1;
b0 = vlib_get_buffer (vm, bi0);
- next0 = SNAT_HAIRPIN_SRC_NEXT_INTERFACE_OUTPUT;
+ next0 = SNAT_IN2OUT_NEXT_LOOKUP;
- if (PREDICT_FALSE ((vnet_buffer (b0)->snat.flags) & SNAT_FLAG_HAIRPINNING))
- {
- if (PREDICT_TRUE (sm->num_workers > 1))
- next0 = SNAT_HAIRPIN_SRC_NEXT_SNAT_IN2OUT_WH;
- else
- next0 = SNAT_HAIRPIN_SRC_NEXT_SNAT_IN2OUT;
- }
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+ rx_fib_index0 =
+ fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
+ sw_if_index0);
+
+ if (PREDICT_FALSE (nat_reass_is_drop_frag (0)))
+ {
+ next0 = SNAT_IN2OUT_NEXT_DROP;
+ b0->error = node->errors[SNAT_IN2OUT_ERROR_DROP_FRAGMENT];
+ goto trace0;
+ }
- pkts_processed += next0 != SNAT_IN2OUT_NEXT_DROP;
+ ip0 = (ip4_header_t *) vlib_buffer_get_current (b0);
+ udp0 = ip4_next_header (ip0);
+ tcp0 = (tcp_header_t *) udp0;
+ icmp0 = (icmp46_header_t *) udp0;
+ proto0 = ip_proto_to_snat_proto (ip0->protocol);
- /* 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);
- }
+ reass0 = nat_ip4_reass_find_or_create (ip0->src_address,
+ ip0->dst_address,
+ ip0->fragment_id,
+ ip0->protocol,
+ 1, &fragments_to_drop);
+
+ if (PREDICT_FALSE (!reass0))
+ {
+ next0 = SNAT_IN2OUT_NEXT_DROP;
+ b0->error = node->errors[SNAT_IN2OUT_ERROR_MAX_REASS];
+ nat_log_notice ("maximum reassemblies exceeded");
+ goto trace0;
+ }
+
+ if (PREDICT_FALSE (ip4_is_first_fragment (ip0)))
+ {
+ if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
+ {
+ next0 = icmp_in2out_slow_path
+ (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
+ next0, now, thread_index, &s0);
+
+ if (PREDICT_TRUE (next0 != SNAT_IN2OUT_NEXT_DROP))
+ {
+ if (s0)
+ reass0->sess_index = s0 - per_thread_data->sessions;
+ else
+ reass0->flags |= NAT_REASS_FLAG_ED_DONT_TRANSLATE;
+ nat_ip4_reass_get_frags (reass0,
+ &fragments_to_loopback);
+ }
+
+ goto trace0;
+ }
+
+ key0.addr = ip0->src_address;
+ key0.port = udp0->src_port;
+ key0.protocol = proto0;
+ key0.fib_index = rx_fib_index0;
+ kv0.key = key0.as_u64;
+
+ if (clib_bihash_search_8_8
+ (&per_thread_data->in2out, &kv0, &value0))
+ {
+ if (PREDICT_FALSE
+ (snat_not_translate
+ (sm, node, sw_if_index0, ip0, proto0, rx_fib_index0,
+ thread_index)))
+ goto trace0;
+
+ next0 = slow_path (sm, b0, ip0, rx_fib_index0, &key0,
+ &s0, node, next0, thread_index, now);
+
+ if (PREDICT_FALSE (next0 == SNAT_IN2OUT_NEXT_DROP))
+ goto trace0;
+
+ if (PREDICT_FALSE (!s0))
+ goto trace0;
+
+ reass0->sess_index = s0 - per_thread_data->sessions;
+ }
+ else
+ {
+ s0 = pool_elt_at_index (per_thread_data->sessions,
+ value0.value);
+ reass0->sess_index = value0.value;
+ }
+ nat_ip4_reass_get_frags (reass0, &fragments_to_loopback);
+ }
+ else
+ {
+ if (PREDICT_FALSE (reass0->sess_index == (u32) ~ 0))
+ {
+ if (nat_ip4_reass_add_fragment
+ (thread_index, reass0, bi0, &fragments_to_drop))
+ {
+ b0->error = node->errors[SNAT_IN2OUT_ERROR_MAX_FRAG];
+ nat_log_notice
+ ("maximum fragments per reassembly exceeded");
+ next0 = SNAT_IN2OUT_NEXT_DROP;
+ goto trace0;
+ }
+ cached0 = 1;
+ goto trace0;
+ }
+ s0 = pool_elt_at_index (per_thread_data->sessions,
+ reass0->sess_index);
+ }
+
+ old_addr0 = ip0->src_address.as_u32;
+ ip0->src_address = s0->out2in.addr;
+ new_addr0 = ip0->src_address.as_u32;
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index;
+
+ sum0 = ip0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
+ ip4_header_t,
+ src_address /* changed member */ );
+ ip0->checksum = ip_csum_fold (sum0);
+
+ if (PREDICT_FALSE (ip4_is_first_fragment (ip0)))
+ {
+ if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
+ {
+ old_port0 = tcp0->src_port;
+ tcp0->src_port = s0->out2in.port;
+ new_port0 = tcp0->src_port;
+
+ sum0 = tcp0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
+ ip4_header_t,
+ dst_address /* changed member */ );
+ sum0 = ip_csum_update (sum0, old_port0, new_port0,
+ ip4_header_t /* cheat */ ,
+ length /* changed member */ );
+ tcp0->checksum = ip_csum_fold (sum0);
+ }
+ else
+ {
+ old_port0 = udp0->src_port;
+ udp0->src_port = s0->out2in.port;
+ udp0->checksum = 0;
+ }
+ }
+
+ /* Hairpinning */
+ nat44_reass_hairpinning (sm, b0, ip0, s0->out2in.port,
+ s0->ext_host_port, proto0, 0);
+
+ /* Accounting */
+ nat44_session_update_counters (s0, now,
+ vlib_buffer_length_in_chain (vm, b0),
+ thread_index);
+ /* Per-user LRU list maintenance */
+ nat44_session_update_lru (sm, s0, thread_index);
+
+ trace0:
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ nat44_reass_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->cached = cached0;
+ t->sw_if_index = sw_if_index0;
+ t->next_index = next0;
+ }
+
+ if (cached0)
+ {
+ n_left_to_next++;
+ to_next--;
+ cached_fragments++;
+ }
+ else
+ {
+ pkts_processed += next0 != SNAT_IN2OUT_NEXT_DROP;
+
+ /* verify speculative enqueue, maybe switch current next frame */
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
+ to_next, n_left_to_next,
+ bi0, next0);
+ }
+
+ if (n_left_from == 0 && vec_len (fragments_to_loopback))
+ {
+ from = vlib_frame_vector_args (frame);
+ u32 len = vec_len (fragments_to_loopback);
+ if (len <= VLIB_FRAME_SIZE)
+ {
+ clib_memcpy_fast (from, fragments_to_loopback,
+ sizeof (u32) * len);
+ n_left_from = len;
+ vec_reset_length (fragments_to_loopback);
+ }
+ else
+ {
+ clib_memcpy_fast (from, fragments_to_loopback +
+ (len - VLIB_FRAME_SIZE),
+ sizeof (u32) * VLIB_FRAME_SIZE);
+ n_left_from = VLIB_FRAME_SIZE;
+ _vec_len (fragments_to_loopback) = len - VLIB_FRAME_SIZE;
+ }
+ }
+ }
vlib_put_next_frame (vm, node, next_index, n_left_to_next);
}
- vlib_node_increment_counter (vm, snat_hairpin_src_node.index,
- SNAT_IN2OUT_ERROR_IN2OUT_PACKETS,
- pkts_processed);
+ vlib_node_increment_counter (vm, sm->in2out_reass_node_index,
+ SNAT_IN2OUT_ERROR_PROCESSED_FRAGMENTS,
+ pkts_processed);
+ vlib_node_increment_counter (vm, sm->in2out_reass_node_index,
+ SNAT_IN2OUT_ERROR_CACHED_FRAGMENTS,
+ cached_fragments);
+
+ nat_send_all_to_node (vm, fragments_to_drop, node,
+ &node->errors[SNAT_IN2OUT_ERROR_DROP_FRAGMENT],
+ SNAT_IN2OUT_NEXT_DROP);
+
+ vec_free (fragments_to_drop);
+ vec_free (fragments_to_loopback);
return frame->n_vectors;
}
-VLIB_REGISTER_NODE (snat_hairpin_src_node) = {
- .function = snat_hairpin_src_fn,
- .name = "nat44-hairpin-src",
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (nat44_in2out_reass_node) = {
+ .name = "nat44-in2out-reass",
.vector_size = sizeof (u32),
+ .format_trace = format_nat44_reass_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
+
.n_errors = ARRAY_LEN(snat_in2out_error_strings),
.error_strings = snat_in2out_error_strings,
- .n_next_nodes = SNAT_HAIRPIN_SRC_N_NEXT,
+
+ .n_next_nodes = SNAT_IN2OUT_N_NEXT,
.next_nodes = {
- [SNAT_HAIRPIN_SRC_NEXT_DROP] = "error-drop",
- [SNAT_HAIRPIN_SRC_NEXT_SNAT_IN2OUT] = "nat44-in2out-output",
- [SNAT_HAIRPIN_SRC_NEXT_INTERFACE_OUTPUT] = "interface-output",
- [SNAT_HAIRPIN_SRC_NEXT_SNAT_IN2OUT_WH] = "nat44-in2out-output-worker-handoff",
+ [SNAT_IN2OUT_NEXT_DROP] = "error-drop",
+ [SNAT_IN2OUT_NEXT_LOOKUP] = "ip4-lookup",
+ [SNAT_IN2OUT_NEXT_SLOW_PATH] = "nat44-in2out-slowpath",
+ [SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
+ [SNAT_IN2OUT_NEXT_REASS] = "nat44-in2out-reass",
},
};
+/* *INDENT-ON* */
-VLIB_NODE_FUNCTION_MULTIARCH (snat_hairpin_src_node,
- snat_hairpin_src_fn);
-
-static uword
-snat_in2out_fast_static_map_fn (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
+VLIB_NODE_FN (snat_in2out_fast_node) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
{
- u32 n_left_from, * from, * to_next;
+ u32 n_left_from, *from, *to_next;
snat_in2out_next_t next_index;
u32 pkts_processed = 0;
- snat_main_t * sm = &snat_main;
+ snat_main_t *sm = &snat_main;
u32 stats_node_index;
- stats_node_index = snat_in2out_fast_node.index;
+ stats_node_index = sm->in2out_fast_node_index;
from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
{
u32 n_left_to_next;
- vlib_get_next_frame (vm, node, next_index,
- to_next, n_left_to_next);
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
while (n_left_from > 0 && n_left_to_next > 0)
{
- u32 bi0;
- vlib_buffer_t * b0;
- u32 next0;
- u32 sw_if_index0;
- ip4_header_t * ip0;
- ip_csum_t sum0;
- u32 new_addr0, old_addr0;
- u16 old_port0, new_port0;
- udp_header_t * udp0;
- tcp_header_t * tcp0;
- icmp46_header_t * icmp0;
- snat_session_key_t key0, sm0;
- u32 proto0;
- u32 rx_fib_index0;
-
- /* speculatively enqueue b0 to the current next frame */
+ u32 bi0;
+ vlib_buffer_t *b0;
+ u32 next0;
+ u32 sw_if_index0;
+ ip4_header_t *ip0;
+ ip_csum_t sum0;
+ u32 new_addr0, old_addr0;
+ u16 old_port0, new_port0;
+ udp_header_t *udp0;
+ tcp_header_t *tcp0;
+ icmp46_header_t *icmp0;
+ snat_session_key_t key0, sm0;
+ u32 proto0;
+ u32 rx_fib_index0;
+
+ /* speculatively enqueue b0 to the current next frame */
bi0 = from[0];
to_next[0] = bi0;
from += 1;
n_left_to_next -= 1;
b0 = vlib_get_buffer (vm, bi0);
- next0 = SNAT_IN2OUT_NEXT_LOOKUP;
+ next0 = SNAT_IN2OUT_NEXT_LOOKUP;
- ip0 = vlib_buffer_get_current (b0);
- udp0 = ip4_next_header (ip0);
- tcp0 = (tcp_header_t *) udp0;
- icmp0 = (icmp46_header_t *) udp0;
+ ip0 = vlib_buffer_get_current (b0);
+ udp0 = ip4_next_header (ip0);
+ tcp0 = (tcp_header_t *) udp0;
+ icmp0 = (icmp46_header_t *) udp0;
- sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
- rx_fib_index0 = ip4_fib_table_get_index_for_sw_if_index(sw_if_index0);
+ sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
+ rx_fib_index0 =
+ ip4_fib_table_get_index_for_sw_if_index (sw_if_index0);
- if (PREDICT_FALSE(ip0->ttl == 1))
- {
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
- icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
- ICMP4_time_exceeded_ttl_exceeded_in_transit,
- 0);
- next0 = SNAT_IN2OUT_NEXT_ICMP_ERROR;
- goto trace0;
- }
+ if (PREDICT_FALSE (ip0->ttl == 1))
+ {
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
+ icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
+ ICMP4_time_exceeded_ttl_exceeded_in_transit,
+ 0);
+ next0 = SNAT_IN2OUT_NEXT_ICMP_ERROR;
+ goto trace0;
+ }
- proto0 = ip_proto_to_snat_proto (ip0->protocol);
+ proto0 = ip_proto_to_snat_proto (ip0->protocol);
- if (PREDICT_FALSE (proto0 == ~0))
- goto trace0;
+ if (PREDICT_FALSE (proto0 == ~0))
+ goto trace0;
- if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
- {
- next0 = icmp_in2out(sm, b0, ip0, icmp0, sw_if_index0,
- rx_fib_index0, node, next0, ~0, 0, 0);
- goto trace0;
- }
+ if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
+ {
+ next0 = icmp_in2out (sm, b0, ip0, icmp0, sw_if_index0,
+ rx_fib_index0, node, next0, ~0, 0, 0);
+ goto trace0;
+ }
- key0.addr = ip0->src_address;
- key0.protocol = proto0;
- key0.port = udp0->src_port;
- key0.fib_index = rx_fib_index0;
+ key0.addr = ip0->src_address;
+ key0.protocol = proto0;
+ key0.port = udp0->src_port;
+ key0.fib_index = rx_fib_index0;
- if (snat_static_mapping_match(sm, key0, &sm0, 0, 0))
- {
- b0->error = node->errors[SNAT_IN2OUT_ERROR_NO_TRANSLATION];
- next0= SNAT_IN2OUT_NEXT_DROP;
- goto trace0;
- }
+ if (snat_static_mapping_match (sm, key0, &sm0, 0, 0, 0, 0, 0, 0))
+ {
+ b0->error = node->errors[SNAT_IN2OUT_ERROR_NO_TRANSLATION];
+ next0 = SNAT_IN2OUT_NEXT_DROP;
+ goto trace0;
+ }
- new_addr0 = sm0.addr.as_u32;
- new_port0 = sm0.port;
- vnet_buffer(b0)->sw_if_index[VLIB_TX] = sm0.fib_index;
- old_addr0 = ip0->src_address.as_u32;
- ip0->src_address.as_u32 = new_addr0;
+ new_addr0 = sm0.addr.as_u32;
+ new_port0 = sm0.port;
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = sm0.fib_index;
+ old_addr0 = ip0->src_address.as_u32;
+ ip0->src_address.as_u32 = new_addr0;
- sum0 = ip0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
- ip4_header_t,
- src_address /* changed member */);
- ip0->checksum = ip_csum_fold (sum0);
+ sum0 = ip0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
+ ip4_header_t,
+ src_address /* changed member */ );
+ ip0->checksum = ip_csum_fold (sum0);
- if (PREDICT_FALSE(new_port0 != udp0->dst_port))
- {
- if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP))
- {
- old_port0 = tcp0->src_port;
- tcp0->src_port = new_port0;
-
- sum0 = tcp0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
- ip4_header_t,
- dst_address /* changed member */);
- sum0 = ip_csum_update (sum0, old_port0, new_port0,
- ip4_header_t /* cheat */,
- length /* changed member */);
- tcp0->checksum = ip_csum_fold(sum0);
- }
- else
- {
- old_port0 = udp0->src_port;
- udp0->src_port = new_port0;
- udp0->checksum = 0;
- }
- }
- else
- {
- if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP))
- {
- sum0 = tcp0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
- ip4_header_t,
- dst_address /* changed member */);
- tcp0->checksum = ip_csum_fold(sum0);
- }
- }
+ if (PREDICT_FALSE (new_port0 != udp0->dst_port))
+ {
+ if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
+ {
+ old_port0 = tcp0->src_port;
+ tcp0->src_port = new_port0;
+
+ sum0 = tcp0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
+ ip4_header_t,
+ dst_address /* changed member */ );
+ sum0 = ip_csum_update (sum0, old_port0, new_port0,
+ ip4_header_t /* cheat */ ,
+ length /* changed member */ );
+ mss_clamping (sm, tcp0, &sum0);
+ tcp0->checksum = ip_csum_fold (sum0);
+ }
+ else
+ {
+ old_port0 = udp0->src_port;
+ udp0->src_port = new_port0;
+ udp0->checksum = 0;
+ }
+ }
+ else
+ {
+ if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
+ {
+ sum0 = tcp0->checksum;
+ sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
+ ip4_header_t,
+ dst_address /* changed member */ );
+ mss_clamping (sm, tcp0, &sum0);
+ tcp0->checksum = ip_csum_fold (sum0);
+ }
+ }
- /* Hairpinning */
- snat_hairpinning (sm, b0, ip0, udp0, tcp0, proto0);
+ /* Hairpinning */
+ snat_hairpinning (sm, b0, ip0, udp0, tcp0, proto0, 0);
- trace0:
- if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b0->flags & VLIB_BUFFER_IS_TRACED)))
- {
- snat_in2out_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->sw_if_index = sw_if_index0;
- t->next_index = next0;
- }
+ trace0:
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ snat_in2out_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->sw_if_index = sw_if_index0;
+ t->next_index = next0;
+ }
- pkts_processed += next0 != SNAT_IN2OUT_NEXT_DROP;
+ pkts_processed += next0 != SNAT_IN2OUT_NEXT_DROP;
- /* verify speculative enqueue, maybe switch current next frame */
+ /* verify speculative enqueue, maybe switch current next frame */
vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
to_next, n_left_to_next,
bi0, next0);
}
vlib_node_increment_counter (vm, stats_node_index,
- SNAT_IN2OUT_ERROR_IN2OUT_PACKETS,
- pkts_processed);
+ SNAT_IN2OUT_ERROR_IN2OUT_PACKETS,
+ pkts_processed);
return frame->n_vectors;
}
+/* *INDENT-OFF* */
VLIB_REGISTER_NODE (snat_in2out_fast_node) = {
- .function = snat_in2out_fast_static_map_fn,
.name = "nat44-in2out-fast",
.vector_size = sizeof (u32),
.format_trace = format_snat_in2out_fast_trace,
[SNAT_IN2OUT_NEXT_LOOKUP] = "ip4-lookup",
[SNAT_IN2OUT_NEXT_SLOW_PATH] = "nat44-in2out-slowpath",
[SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
+ [SNAT_IN2OUT_NEXT_REASS] = "nat44-in2out-reass",
},
};
+/* *INDENT-ON* */
-VLIB_NODE_FUNCTION_MULTIARCH (snat_in2out_fast_node, snat_in2out_fast_static_map_fn);
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
Code Review / vpp.git / blobdiff