2 * Copyright (c) 2018 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
17 * @brief NAT44 endpoint-dependent inside to outside network translation
20 #include <vlib/vlib.h>
21 #include <vnet/vnet.h>
22 #include <vnet/ip/ip.h>
23 #include <vnet/ethernet/ethernet.h>
24 #include <vnet/fib/ip4_fib.h>
25 #include <vnet/udp/udp_local.h>
26 #include <vppinfra/error.h>
28 #include <nat/lib/nat_inlines.h>
29 #include <nat/lib/ipfix_logging.h>
31 #include <nat/nat44-ed/nat44_ed.h>
32 #include <nat/nat44-ed/nat44_ed_inlines.h>
34 static char *nat_in2out_ed_error_strings[] = {
35 #define _(sym,string) string,
36 foreach_nat_in2out_ed_error
45 nat_translation_error_e translation_error;
48 clib_bihash_kv_16_8_t search_key;
50 u8 translation_via_i2of;
53 } nat_in2out_ed_trace_t;
56 format_nat_in2out_ed_trace (u8 * s, va_list * args)
58 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
59 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
60 nat_in2out_ed_trace_t *t = va_arg (*args, nat_in2out_ed_trace_t *);
64 t->is_slow_path ? "NAT44_IN2OUT_ED_SLOW_PATH" :
65 "NAT44_IN2OUT_ED_FAST_PATH";
67 s = format (s, "%s: sw_if_index %d, next index %d", tag, t->sw_if_index,
69 if (~0 != t->session_index)
71 s = format (s, ", session %d, translation result '%U' via %s",
72 t->session_index, format_nat_ed_translation_error,
74 t->translation_via_i2of ? "i2of" : "o2if");
75 s = format (s, "\n i2of %U", format_nat_6t_flow, &t->i2of);
76 s = format (s, "\n o2if %U", format_nat_6t_flow, &t->o2if);
80 if (t->lookup_skipped)
82 s = format (s, "\n lookup skipped - cached session index used");
86 s = format (s, "\n search key %U", format_ed_session_kvp,
90 if (IP_PROTOCOL_TCP == t->i2of.match.proto)
92 s = format (s, "\n TCP state: %U", format_nat44_ed_tcp_state,
100 nat_ed_alloc_addr_and_port_with_snat_address (
101 snat_main_t *sm, u8 proto, u32 thread_index, snat_address_t *a,
102 u16 port_per_thread, u32 snat_thread_index, snat_session_t *s,
103 ip4_address_t *outside_addr, u16 *outside_port)
105 const u16 port_thread_offset =
106 (port_per_thread * snat_thread_index) + ED_USER_PORT_OFFSET;
108 /* Backup original match in case of failure */
109 const nat_6t_t match = s->o2i.match;
111 s->o2i.match.daddr = a->addr;
112 /* first try port suggested by caller */
113 u16 port = clib_net_to_host_u16 (*outside_port);
114 u16 port_offset = port - port_thread_offset;
115 if (port < port_thread_offset ||
116 port >= port_thread_offset + port_per_thread)
118 /* need to pick a different port, suggested port doesn't fit in
119 * this thread's port range */
120 port_offset = snat_random_port (0, port_per_thread - 1);
121 port = port_thread_offset + port_offset;
123 u16 attempts = ED_PORT_ALLOC_ATTEMPTS;
126 if (IP_PROTOCOL_ICMP == proto)
128 s->o2i.match.sport = clib_host_to_net_u16 (port);
130 s->o2i.match.dport = clib_host_to_net_u16 (port);
131 if (0 == nat_ed_ses_o2i_flow_hash_add_del (sm, thread_index, s, 2))
133 *outside_addr = a->addr;
134 *outside_port = clib_host_to_net_u16 (port);
137 port_offset = snat_random_port (0, port_per_thread - 1);
138 port = port_thread_offset + port_offset;
141 while (attempts > 0);
144 s->o2i.match = match;
149 nat_ed_alloc_addr_and_port (snat_main_t *sm, u32 rx_fib_index,
150 u32 tx_sw_if_index, u32 nat_proto,
151 u32 thread_index, ip4_address_t s_addr,
152 ip4_address_t d_addr, u32 snat_thread_index,
153 snat_session_t *s, ip4_address_t *outside_addr,
156 if (vec_len (sm->addresses) > 0)
158 u32 s_addr_offset = (s_addr.as_u32 + (s_addr.as_u32 >> 8) +
159 (s_addr.as_u32 >> 16) + (s_addr.as_u32 >> 24)) %
160 vec_len (sm->addresses);
161 snat_address_t *a, *ja = 0, *ra = 0, *ba = 0;
165 if (tx_sw_if_index != ~0)
167 for (i = s_addr_offset; i < vec_len (sm->addresses); ++i)
169 a = sm->addresses + i;
170 if (a->fib_index == rx_fib_index)
172 if (a->sw_if_index == tx_sw_if_index)
174 if ((a->addr_len != ~0) &&
176 (d_addr.as_u32 & ip4_main.fib_masks[a->addr_len])))
179 return nat_ed_alloc_addr_and_port_with_snat_address (
180 sm, nat_proto, thread_index, a,
181 sm->port_per_thread, snat_thread_index, s,
182 outside_addr, outside_port);
188 else if (a->fib_index == ~0)
193 for (i = 0; i < s_addr_offset; ++i)
195 a = sm->addresses + i;
196 if (a->fib_index == rx_fib_index)
198 if (a->sw_if_index == tx_sw_if_index)
200 if ((a->addr_len != ~0) &&
202 (d_addr.as_u32 & ip4_main.fib_masks[a->addr_len])))
205 return nat_ed_alloc_addr_and_port_with_snat_address (
206 sm, nat_proto, thread_index, a,
207 sm->port_per_thread, snat_thread_index, s,
208 outside_addr, outside_port);
214 else if (a->fib_index == ~0)
221 return nat_ed_alloc_addr_and_port_with_snat_address (
222 sm, nat_proto, thread_index, ra, sm->port_per_thread,
223 snat_thread_index, s, outside_addr, outside_port);
228 // first try nat pool addresses to sw interface addreses mappings
229 for (i = s_addr_offset; i < vec_len (sm->addresses); ++i)
231 a = sm->addresses + i;
232 if (a->fib_index == rx_fib_index)
234 if ((a->addr_len != ~0) &&
236 (d_addr.as_u32 & ip4_main.fib_masks[a->addr_len])))
238 return nat_ed_alloc_addr_and_port_with_snat_address (
239 sm, nat_proto, thread_index, a, sm->port_per_thread,
240 snat_thread_index, s, outside_addr, outside_port);
244 else if (a->fib_index == ~0)
249 for (i = 0; i < s_addr_offset; ++i)
251 a = sm->addresses + i;
252 if (a->fib_index == rx_fib_index)
254 if ((a->addr_len != ~0) &&
256 (d_addr.as_u32 & ip4_main.fib_masks[a->addr_len])))
258 return nat_ed_alloc_addr_and_port_with_snat_address (
259 sm, nat_proto, thread_index, a, sm->port_per_thread,
260 snat_thread_index, s, outside_addr, outside_port);
264 else if (a->fib_index == ~0)
274 return nat_ed_alloc_addr_and_port_with_snat_address (
275 sm, nat_proto, thread_index, a, sm->port_per_thread,
276 snat_thread_index, s, outside_addr, outside_port);
279 /* Totally out of translations to use... */
280 nat_ipfix_logging_addresses_exhausted (thread_index, 0);
284 static_always_inline int
285 nat44_ed_external_sm_lookup (snat_main_t *sm, ip4_address_t match_addr,
286 u16 match_port, ip_protocol_t match_protocol,
287 ip4_address_t *daddr, u16 *dport)
289 snat_static_mapping_t *m =
290 nat44_ed_sm_o2i_lookup (sm, match_addr, match_port, 0, match_protocol);
293 /* Try address only mapping */
294 m = nat44_ed_sm_o2i_lookup (sm, match_addr, 0, 0, 0);
298 *daddr = m->local_addr;
301 /* Address only mapping doesn't change port */
302 *dport = is_sm_addr_only (m->flags) ? match_port : m->local_port;
307 static_always_inline vrf_table_t *
308 get_vrf_table_by_fib (u32 fib_index)
310 snat_main_t *sm = &snat_main;
313 pool_foreach (t, sm->vrf_tables)
315 if (fib_index == t->table_fib_index)
324 static_always_inline u32
325 get_tx_fib_index (u32 rx_fib_index, ip4_address_t addr)
327 fib_node_index_t fei = FIB_NODE_INDEX_INVALID;
329 .fp_proto = FIB_PROTOCOL_IP4,
331 .fp_addr = {.ip4.as_u32 = addr.as_u32,}
335 snat_main_t *sm = &snat_main;
336 vrf_table_t *t = get_vrf_table_by_fib (rx_fib_index);
338 u32 tx_fib_index = rx_fib_index;
342 // managed routes to other fibs
344 pool_foreach (r, t->routes)
346 fei = fib_table_lookup (r->fib_index, &pfx);
347 if ((FIB_NODE_INDEX_INVALID != fei) &&
348 (~0 != fib_entry_get_resolving_interface (fei)))
350 tx_fib_index = r->fib_index;
357 // default to configured fib
358 tx_fib_index = sm->outside_fib_index;
360 // default routes to other fibs
362 vec_foreach (f, sm->outside_fibs)
364 fei = fib_table_lookup (f->fib_index, &pfx);
365 if ((FIB_NODE_INDEX_INVALID != fei) &&
366 (~0 != fib_entry_get_resolving_interface (fei)))
368 tx_fib_index = f->fib_index;
377 static_always_inline int
378 is_destination_resolvable (u32 rx_fib_index, ip4_address_t addr)
380 fib_node_index_t fei = FIB_NODE_INDEX_INVALID;
382 .fp_proto = FIB_PROTOCOL_IP4,
384 .fp_addr = {.ip4.as_u32 = addr.as_u32,}
388 snat_main_t *sm = &snat_main;
389 vrf_table_t *t = get_vrf_table_by_fib (rx_fib_index);
394 // managed routes to other fibs
396 pool_foreach (r, t->routes)
398 fei = fib_table_lookup (r->fib_index, &pfx);
399 if ((FIB_NODE_INDEX_INVALID != fei) &&
400 (~0 != (ii = fib_entry_get_resolving_interface (fei))))
408 // default routes to other fibs
410 vec_foreach (f, sm->outside_fibs)
412 fei = fib_table_lookup (f->fib_index, &pfx);
413 if ((FIB_NODE_INDEX_INVALID != fei) &&
414 (~0 != (ii = fib_entry_get_resolving_interface (fei))))
417 pool_foreach (i, sm->interfaces)
419 if ((nat44_ed_is_interface_outside (i)) &&
420 (ii == i->sw_if_index))
433 slow_path_ed (vlib_main_t *vm, snat_main_t *sm, vlib_buffer_t *b,
434 ip4_address_t l_addr, ip4_address_t r_addr, u16 l_port,
435 u16 r_port, u8 proto, u32 rx_fib_index, u32 tx_sw_if_index,
436 snat_session_t **sessionp, vlib_node_runtime_t *node, u32 next,
437 u32 thread_index, f64 now)
439 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
440 ip4_address_t outside_addr;
443 u8 is_identity_nat = 0;
445 snat_session_t *s = NULL;
446 lb_nat_type_t lb = 0;
447 ip4_address_t daddr = r_addr;
451 (nat44_ed_maximum_sessions_exceeded (sm, rx_fib_index, thread_index)))
453 if (!nat_lru_free_one (sm, thread_index, now))
455 b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_SESSIONS_EXCEEDED];
456 nat_ipfix_logging_max_sessions (thread_index,
457 sm->max_translations_per_thread);
458 nat_elog_notice (sm, "maximum sessions exceeded");
459 return NAT_NEXT_DROP;
463 ip4_address_t sm_addr;
467 // First try to match static mapping by local address and port
468 if (!snat_static_mapping_match (vm, l_addr, l_port, rx_fib_index, proto,
469 &sm_addr, &sm_port, &sm_fib_index, 0, 0, 0,
470 &lb, 0, &is_identity_nat, 0))
472 if (PREDICT_FALSE (is_identity_nat))
480 if (PREDICT_TRUE (proto == IP_PROTOCOL_TCP))
482 if (PREDICT_FALSE (!tcp_flags_is_init (
483 vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags)))
485 b->error = node->errors[NAT_IN2OUT_ED_ERROR_NON_SYN];
486 return NAT_NEXT_DROP;
490 s = nat_ed_session_alloc (sm, thread_index, now, proto);
493 tx_fib_index = get_tx_fib_index (rx_fib_index, r_addr);
497 s->in2out.addr = l_addr;
498 s->in2out.port = l_port;
500 s->in2out.fib_index = rx_fib_index;
501 s->out2in.fib_index = tx_fib_index;
503 // suggest using local port to allocation function
504 outside_port = l_port;
506 if (PREDICT_FALSE (nat44_ed_external_sm_lookup (sm, r_addr, r_port,
507 proto, &daddr, &dport)))
509 s->flags |= SNAT_SESSION_FLAG_HAIRPINNING;
512 // destination addr/port updated with real values in
513 // nat_ed_alloc_addr_and_port
514 nat_6t_o2i_flow_init (sm, thread_index, s, daddr, dport, daddr, 0,
515 s->out2in.fib_index, proto);
516 nat_6t_flow_daddr_rewrite_set (&s->o2i, l_addr.as_u32);
517 if (IP_PROTOCOL_ICMP == proto)
519 nat_6t_flow_icmp_id_rewrite_set (&s->o2i, l_port);
523 nat_6t_flow_dport_rewrite_set (&s->o2i, l_port);
525 nat_6t_flow_txfib_rewrite_set (&s->o2i, rx_fib_index);
527 if (nat_ed_alloc_addr_and_port (
528 sm, rx_fib_index, tx_sw_if_index, proto, thread_index, l_addr,
529 r_addr, tsm->snat_thread_index, s, &outside_addr, &outside_port))
531 nat_elog_notice (sm, "addresses exhausted");
532 b->error = node->errors[NAT_IN2OUT_ED_ERROR_OUT_OF_PORTS];
533 nat_ed_session_delete (sm, s, thread_index, 1);
534 return NAT_NEXT_DROP;
536 s->out2in.addr = outside_addr;
537 s->out2in.port = outside_port;
542 s->out2in.addr = outside_addr = sm_addr;
543 s->out2in.port = outside_port = sm_port;
544 s->in2out.addr = l_addr;
545 s->in2out.port = l_port;
547 s->in2out.fib_index = rx_fib_index;
548 s->out2in.fib_index = tx_fib_index;
549 s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING;
552 int is_hairpinning = nat44_ed_external_sm_lookup (sm, r_addr, r_port,
553 proto, &daddr, &dport);
554 s->flags |= is_hairpinning * SNAT_SESSION_FLAG_HAIRPINNING;
556 if (IP_PROTOCOL_ICMP == proto)
558 nat_6t_o2i_flow_init (sm, thread_index, s, daddr, sm_port, sm_addr,
559 sm_port, s->out2in.fib_index, proto);
560 nat_6t_flow_icmp_id_rewrite_set (&s->o2i, l_port);
564 nat_6t_o2i_flow_init (sm, thread_index, s, daddr, dport, sm_addr,
565 sm_port, s->out2in.fib_index, proto);
566 nat_6t_flow_dport_rewrite_set (&s->o2i, l_port);
568 nat_6t_flow_daddr_rewrite_set (&s->o2i, l_addr.as_u32);
569 nat_6t_flow_txfib_rewrite_set (&s->o2i, rx_fib_index);
570 if (nat_ed_ses_o2i_flow_hash_add_del (sm, thread_index, s, 2))
572 nat_elog_notice (sm, "out2in key add failed");
578 s->flags |= SNAT_SESSION_FLAG_LOAD_BALANCING;
579 s->ext_host_addr = r_addr;
580 s->ext_host_port = r_port;
582 nat_6t_i2o_flow_init (sm, thread_index, s, l_addr, l_port, r_addr, r_port,
583 rx_fib_index, proto);
584 nat_6t_flow_saddr_rewrite_set (&s->i2o, outside_addr.as_u32);
585 nat_6t_flow_daddr_rewrite_set (&s->i2o, daddr.as_u32);
587 if (IP_PROTOCOL_ICMP == proto)
589 nat_6t_flow_icmp_id_rewrite_set (&s->i2o, outside_port);
593 nat_6t_flow_sport_rewrite_set (&s->i2o, outside_port);
594 nat_6t_flow_dport_rewrite_set (&s->i2o, dport);
596 nat_6t_flow_txfib_rewrite_set (&s->i2o, tx_fib_index);
598 if (nat_ed_ses_i2o_flow_hash_add_del (sm, thread_index, s, 1))
600 nat_elog_notice (sm, "in2out key add failed");
605 nat_ipfix_logging_nat44_ses_create (
606 thread_index, s->in2out.addr.as_u32, s->out2in.addr.as_u32, s->proto,
607 s->in2out.port, s->out2in.port, s->in2out.fib_index);
609 nat_syslog_nat44_sadd (0, s->in2out.fib_index, &s->in2out.addr,
610 s->in2out.port, &s->ext_host_nat_addr,
611 s->ext_host_nat_port, &s->out2in.addr, s->out2in.port,
612 &s->ext_host_addr, s->ext_host_port, s->proto, 0);
614 per_vrf_sessions_register_session (s, thread_index);
621 nat_ed_session_delete (sm, s, thread_index, 1);
623 *sessionp = s = NULL;
624 return NAT_NEXT_DROP;
627 static_always_inline int
628 nat44_ed_not_translate (vlib_main_t *vm, vlib_node_runtime_t *node,
629 u32 sw_if_index, vlib_buffer_t *b, ip4_header_t *ip,
630 u32 proto, u32 rx_fib_index)
632 snat_main_t *sm = &snat_main;
634 clib_bihash_kv_16_8_t kv, value;
635 ip4_address_t placeholder_addr;
636 u32 placeholder_fib_index;
637 u16 placeholder_port;
639 init_ed_k (&kv, ip->dst_address.as_u32,
640 vnet_buffer (b)->ip.reass.l4_dst_port, ip->src_address.as_u32,
641 vnet_buffer (b)->ip.reass.l4_src_port, sm->outside_fib_index,
644 // do nat if active session or is static mapping
645 if (!clib_bihash_search_16_8 (&sm->flow_hash, &kv, &value) ||
646 !snat_static_mapping_match (
647 vm, ip->dst_address, vnet_buffer (b)->ip.reass.l4_dst_port,
648 sm->outside_fib_index, proto, &placeholder_addr, &placeholder_port,
649 &placeholder_fib_index, 1, 0, 0, 0, 0, 0, 0))
654 // do not nat if forwarding enabled
655 if (sm->forwarding_enabled)
660 // do not nat packet aimed at the interface address
662 is_interface_addr (sm, node, sw_if_index, ip->dst_address.as_u32)))
667 // do nat packets with resolvable destination
668 // destination can be resolved either by:
669 // a) vrf routing table entry
670 // b) (non output feature) outside interface fib
671 if (is_destination_resolvable (rx_fib_index, ip->dst_address))
679 static_always_inline int
680 nat_not_translate_output_feature_fwd (snat_main_t * sm, ip4_header_t * ip,
681 u32 thread_index, f64 now,
682 vlib_main_t * vm, vlib_buffer_t * b)
684 clib_bihash_kv_16_8_t kv, value;
685 snat_session_t *s = 0;
686 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
688 if (!sm->forwarding_enabled)
691 if (ip->protocol == IP_PROTOCOL_ICMP)
693 ip4_address_t lookup_saddr, lookup_daddr;
694 u16 lookup_sport, lookup_dport;
696 if (nat_get_icmp_session_lookup_values (b, ip, &lookup_saddr,
697 &lookup_sport, &lookup_daddr,
698 &lookup_dport, &lookup_protocol))
700 init_ed_k (&kv, lookup_saddr.as_u32, lookup_sport, lookup_daddr.as_u32,
701 lookup_dport, 0, lookup_protocol);
703 else if (ip->protocol == IP_PROTOCOL_UDP || ip->protocol == IP_PROTOCOL_TCP)
705 init_ed_k (&kv, ip->src_address.as_u32,
706 vnet_buffer (b)->ip.reass.l4_src_port, ip->dst_address.as_u32,
707 vnet_buffer (b)->ip.reass.l4_dst_port, 0, ip->protocol);
711 init_ed_k (&kv, ip->src_address.as_u32, 0, ip->dst_address.as_u32, 0, 0,
715 if (!clib_bihash_search_16_8 (&sm->flow_hash, &kv, &value))
717 ASSERT (thread_index == ed_value_get_thread_index (&value));
719 pool_elt_at_index (tsm->sessions,
720 ed_value_get_session_index (&value));
722 if (na44_ed_is_fwd_bypass_session (s))
724 if (ip->protocol == IP_PROTOCOL_TCP)
726 nat44_set_tcp_session_state_i2o (
727 sm, now, s, vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags,
731 nat44_session_update_counters (s, now,
732 vlib_buffer_length_in_chain (vm, b),
734 /* Per-user LRU list maintenance */
735 nat44_session_update_lru (sm, s, thread_index);
745 static_always_inline int
746 nat44_ed_not_translate_output_feature (snat_main_t *sm, vlib_buffer_t *b,
747 ip4_header_t *ip, u16 src_port,
748 u16 dst_port, u32 thread_index,
749 u32 rx_sw_if_index, u32 tx_sw_if_index,
752 clib_bihash_kv_16_8_t kv, value;
753 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
756 u32 rx_fib_index = ip4_fib_table_get_index_for_sw_if_index (rx_sw_if_index);
757 u32 tx_fib_index = ip4_fib_table_get_index_for_sw_if_index (tx_sw_if_index);
760 init_ed_k (&kv, ip->src_address.as_u32, src_port, ip->dst_address.as_u32,
761 dst_port, tx_fib_index, ip->protocol);
762 if (!clib_bihash_search_16_8 (&sm->flow_hash, &kv, &value))
764 ASSERT (thread_index == ed_value_get_thread_index (&value));
766 pool_elt_at_index (tsm->sessions,
767 ed_value_get_session_index (&value));
772 if (is_multi_worker &&
773 PREDICT_TRUE (!pool_is_free_index (
774 tsm->sessions, vnet_buffer2 (b)->nat.cached_dst_nat_session_index)))
777 lookup.fib_index = rx_fib_index;
778 lookup.proto = ip->protocol;
779 lookup.daddr.as_u32 = ip->src_address.as_u32;
780 lookup.dport = src_port;
781 lookup.saddr.as_u32 = ip->dst_address.as_u32;
782 lookup.sport = dst_port;
783 s = pool_elt_at_index (
784 tsm->sessions, vnet_buffer2 (b)->nat.cached_dst_nat_session_index);
785 if (PREDICT_TRUE (nat_6t_t_eq (&s->i2o.match, &lookup)))
787 goto skip_dst_nat_lookup;
792 init_ed_k (&kv, ip->dst_address.as_u32, dst_port, ip->src_address.as_u32,
793 src_port, rx_fib_index, ip->protocol);
794 if (!clib_bihash_search_16_8 (&sm->flow_hash, &kv, &value))
796 ASSERT (thread_index == ed_value_get_thread_index (&value));
798 pool_elt_at_index (tsm->sessions,
799 ed_value_get_session_index (&value));
802 if (na44_ed_is_fwd_bypass_session (s))
806 pool_foreach (i, sm->output_feature_interfaces)
808 if ((nat44_ed_is_interface_inside (i)) &&
809 (rx_sw_if_index == i->sw_if_index))
819 icmp_in2out_ed_slow_path (snat_main_t *sm, vlib_buffer_t *b, ip4_header_t *ip,
820 icmp46_header_t *icmp, u32 sw_if_index,
821 u32 tx_sw_if_index, u32 rx_fib_index,
822 vlib_node_runtime_t *node, u32 next, f64 now,
823 u32 thread_index, snat_session_t **s_p,
826 vlib_main_t *vm = vlib_get_main ();
829 snat_session_t *s = NULL;
830 u8 lookup_protocol = ip->protocol;
831 u16 lookup_sport, lookup_dport;
832 ip4_address_t lookup_saddr, lookup_daddr;
834 err = nat_get_icmp_session_lookup_values (b, ip, &lookup_saddr,
835 &lookup_sport, &lookup_daddr,
836 &lookup_dport, &lookup_protocol);
839 b->error = node->errors[err];
840 return NAT_NEXT_DROP;
843 if (tx_sw_if_index != ~0)
845 if (PREDICT_FALSE (nat44_ed_not_translate_output_feature (
846 sm, b, ip, lookup_sport, lookup_dport, thread_index, sw_if_index,
847 tx_sw_if_index, is_multi_worker)))
854 if (PREDICT_FALSE (nat44_ed_not_translate (
855 vm, node, sw_if_index, b, ip, IP_PROTOCOL_ICMP, rx_fib_index)))
861 if (PREDICT_FALSE (icmp_type_is_error_message (
862 vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags)))
864 b->error = node->errors[NAT_IN2OUT_ED_ERROR_BAD_ICMP_TYPE];
865 return NAT_NEXT_DROP;
869 slow_path_ed (vm, sm, b, ip->src_address, ip->dst_address, lookup_sport,
870 lookup_dport, ip->protocol, rx_fib_index, tx_sw_if_index, &s,
871 node, next, thread_index, vlib_time_now (vm));
873 if (NAT_NEXT_DROP == next)
876 if (PREDICT_TRUE (!ip4_is_fragment (ip)))
878 ip_csum_t sum = ip_incremental_checksum_buffer (
879 vm, b, (u8 *) icmp - (u8 *) vlib_buffer_get_current (b),
880 ntohs (ip->length) - ip4_header_bytes (ip), 0);
881 checksum = ~ip_csum_fold (sum);
882 if (PREDICT_FALSE (checksum != 0 && checksum != 0xffff))
884 next = NAT_NEXT_DROP;
890 if (PREDICT_TRUE (next != NAT_NEXT_DROP && s))
893 nat44_session_update_counters (
894 s, now, vlib_buffer_length_in_chain (vm, b), thread_index);
895 /* Per-user LRU list maintenance */
896 nat44_session_update_lru (sm, s, thread_index);
902 static snat_session_t *
903 nat44_ed_in2out_slowpath_unknown_proto (snat_main_t *sm, vlib_buffer_t *b,
904 ip4_header_t *ip, u32 rx_fib_index,
905 u32 thread_index, f64 now,
907 vlib_node_runtime_t *node)
909 clib_bihash_kv_16_8_t s_kv, s_value;
910 snat_static_mapping_t *m = NULL;
911 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
912 snat_session_t *s = NULL;
915 ip4_address_t new_src_addr = { 0 };
916 ip4_address_t new_dst_addr = ip->dst_address;
919 nat44_ed_maximum_sessions_exceeded (sm, rx_fib_index, thread_index)))
921 b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_SESSIONS_EXCEEDED];
922 nat_ipfix_logging_max_sessions (thread_index,
923 sm->max_translations_per_thread);
924 nat_elog_notice (sm, "maximum sessions exceeded");
928 tx_fib_index = get_tx_fib_index (rx_fib_index, ip->dst_address);
930 // Try to find static mapping first
931 m = nat44_ed_sm_i2o_lookup (sm, ip->src_address, 0, rx_fib_index,
935 new_src_addr = m->external_addr;
939 pool_foreach (s, tsm->sessions)
941 if (s->ext_host_addr.as_u32 == ip->dst_address.as_u32)
943 init_ed_k (&s_kv, s->out2in.addr.as_u32, 0,
944 ip->dst_address.as_u32, 0, tx_fib_index,
946 if (clib_bihash_search_16_8 (&sm->flow_hash, &s_kv, &s_value))
948 new_src_addr = s->out2in.addr;
954 if (!new_src_addr.as_u32)
956 for (i = 0; i < vec_len (sm->addresses); i++)
958 init_ed_k (&s_kv, sm->addresses[i].addr.as_u32, 0,
959 ip->dst_address.as_u32, 0, tx_fib_index,
961 if (clib_bihash_search_16_8 (&sm->flow_hash, &s_kv, &s_value))
963 new_src_addr = sm->addresses[i].addr;
969 if (!new_src_addr.as_u32)
971 // could not allocate address for translation ...
975 s = nat_ed_session_alloc (sm, thread_index, now, ip->protocol);
978 b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_SESSIONS_EXCEEDED];
979 nat_elog_warn (sm, "create NAT session failed");
983 nat_6t_i2o_flow_init (sm, thread_index, s, ip->src_address, 0,
984 ip->dst_address, 0, rx_fib_index, ip->protocol);
985 nat_6t_flow_saddr_rewrite_set (&s->i2o, new_src_addr.as_u32);
986 nat_6t_flow_txfib_rewrite_set (&s->i2o, tx_fib_index);
989 int is_hairpinning = nat44_ed_external_sm_lookup (
990 sm, ip->dst_address, 0, ip->protocol, &new_dst_addr, NULL);
991 s->flags |= is_hairpinning * SNAT_SESSION_FLAG_HAIRPINNING;
993 nat_6t_flow_daddr_rewrite_set (&s->i2o, new_dst_addr.as_u32);
994 nat_6t_flow_txfib_rewrite_set (&s->i2o, tx_fib_index);
996 nat_6t_o2i_flow_init (sm, thread_index, s, new_dst_addr, 0, new_src_addr, 0,
997 tx_fib_index, ip->protocol);
998 nat_6t_flow_saddr_rewrite_set (&s->o2i, ip->dst_address.as_u32);
999 nat_6t_flow_daddr_rewrite_set (&s->o2i, ip->src_address.as_u32);
1000 nat_6t_flow_txfib_rewrite_set (&s->o2i, rx_fib_index);
1002 s->ext_host_addr.as_u32 = ip->dst_address.as_u32;
1003 s->out2in.addr.as_u32 = new_src_addr.as_u32;
1004 s->out2in.fib_index = tx_fib_index;
1005 s->in2out.addr.as_u32 = ip->src_address.as_u32;
1006 s->in2out.fib_index = rx_fib_index;
1007 s->in2out.port = s->out2in.port = ip->protocol;
1009 s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING;
1011 if (nat_ed_ses_i2o_flow_hash_add_del (sm, thread_index, s, 1))
1013 nat_elog_notice (sm, "in2out flow hash add failed");
1014 nat_ed_session_delete (sm, s, thread_index, 1);
1018 if (nat_ed_ses_o2i_flow_hash_add_del (sm, thread_index, s, 1))
1020 nat_elog_notice (sm, "out2in flow hash add failed");
1021 nat_ed_session_delete (sm, s, thread_index, 1);
1025 per_vrf_sessions_register_session (s, thread_index);
1028 nat44_session_update_counters (s, now, vlib_buffer_length_in_chain (vm, b),
1030 /* Per-user LRU list maintenance */
1031 nat44_session_update_lru (sm, s, thread_index);
1037 nat44_ed_in2out_fast_path_node_fn_inline (vlib_main_t *vm,
1038 vlib_node_runtime_t *node,
1039 vlib_frame_t *frame,
1040 int is_output_feature,
1041 int is_multi_worker)
1043 u32 n_left_from, *from;
1044 snat_main_t *sm = &snat_main;
1045 f64 now = vlib_time_now (vm);
1046 u32 thread_index = vm->thread_index;
1047 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
1048 u32 def_slow = is_output_feature ? NAT_NEXT_IN2OUT_ED_OUTPUT_SLOW_PATH
1049 : NAT_NEXT_IN2OUT_ED_SLOW_PATH;
1051 from = vlib_frame_vector_args (frame);
1052 n_left_from = frame->n_vectors;
1054 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
1055 u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
1056 vlib_get_buffers (vm, from, b, n_left_from);
1058 while (n_left_from > 0)
1061 u32 rx_sw_if_index0, rx_fib_index0, iph_offset0 = 0;
1062 u32 tx_sw_if_index0;
1063 u32 cntr_sw_if_index0;
1064 ip_protocol_t proto0;
1066 snat_session_t *s0 = 0;
1067 clib_bihash_kv_16_8_t kv0 = { 0 }, value0;
1068 nat_translation_error_e translation_error = NAT_ED_TRNSL_ERR_SUCCESS;
1069 nat_6t_flow_t *f = 0;
1071 int lookup_skipped = 0;
1076 /* Prefetch next iteration. */
1077 if (PREDICT_TRUE (n_left_from >= 2))
1083 vlib_prefetch_buffer_header (p2, LOAD);
1085 clib_prefetch_load (p2->data);
1088 if (is_output_feature)
1090 iph_offset0 = vnet_buffer (b0)->ip.reass.save_rewrite_length;
1093 next[0] = vnet_buffer2 (b0)->nat.arc_next;
1096 (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) + iph_offset0);
1098 rx_sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
1099 tx_sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
1101 is_output_feature ? tx_sw_if_index0 : rx_sw_if_index0;
1102 rx_fib_index0 = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
1104 lookup.fib_index = rx_fib_index0;
1106 if (PREDICT_FALSE (!is_output_feature && ip0->ttl == 1))
1108 vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1109 icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
1110 ICMP4_time_exceeded_ttl_exceeded_in_transit,
1112 next[0] = NAT_NEXT_ICMP_ERROR;
1116 proto0 = ip0->protocol;
1118 if (is_output_feature)
1121 (nat_not_translate_output_feature_fwd
1122 (sm, ip0, thread_index, now, vm, b0)))
1126 if (PREDICT_FALSE (proto0 == IP_PROTOCOL_ICMP))
1128 if (vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags !=
1129 ICMP4_echo_request &&
1130 vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags !=
1132 !icmp_type_is_error_message (
1133 vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags))
1135 b0->error = node->errors[NAT_IN2OUT_ED_ERROR_BAD_ICMP_TYPE];
1136 next[0] = NAT_NEXT_DROP;
1139 int err = nat_get_icmp_session_lookup_values (
1140 b0, ip0, &lookup.saddr, &lookup.sport, &lookup.daddr,
1141 &lookup.dport, &lookup.proto);
1144 b0->error = node->errors[err];
1145 next[0] = NAT_NEXT_DROP;
1151 lookup.proto = ip0->protocol;
1152 lookup.saddr.as_u32 = ip0->src_address.as_u32;
1153 lookup.daddr.as_u32 = ip0->dst_address.as_u32;
1154 lookup.sport = vnet_buffer (b0)->ip.reass.l4_src_port;
1155 lookup.dport = vnet_buffer (b0)->ip.reass.l4_dst_port;
1158 /* there might be a stashed index in vnet_buffer2 from handoff or
1159 * classify node, see if it can be used */
1160 if (is_multi_worker &&
1161 !pool_is_free_index (tsm->sessions,
1162 vnet_buffer2 (b0)->nat.cached_session_index))
1164 s0 = pool_elt_at_index (tsm->sessions,
1165 vnet_buffer2 (b0)->nat.cached_session_index);
1167 nat_6t_t_eq (&s0->i2o.match, &lookup)
1168 // for some hairpinning cases there are two "i2i" flows instead
1169 // of i2o and o2i as both hosts are on inside
1170 || (s0->flags & SNAT_SESSION_FLAG_HAIRPINNING &&
1171 nat_6t_t_eq (&s0->o2i.match, &lookup))))
1173 /* yes, this is the droid we're looking for */
1180 init_ed_k (&kv0, lookup.saddr.as_u32, lookup.sport, lookup.daddr.as_u32,
1181 lookup.dport, lookup.fib_index, lookup.proto);
1184 if (clib_bihash_search_16_8 (&sm->flow_hash, &kv0, &value0))
1186 // flow does not exist go slow path
1191 ASSERT (thread_index == ed_value_get_thread_index (&value0));
1193 pool_elt_at_index (tsm->sessions,
1194 ed_value_get_session_index (&value0));
1198 ASSERT (thread_index == s0->thread_index);
1200 if (PREDICT_FALSE (per_vrf_sessions_is_expired (s0, thread_index)))
1202 // session is closed, go slow path
1203 nat44_ed_free_session_data (sm, s0, thread_index, 0);
1204 nat_ed_session_delete (sm, s0, thread_index, 1);
1210 // drop if session expired
1211 u64 sess_timeout_time;
1213 s0->last_heard + (f64) nat44_session_get_timeout (sm, s0);
1214 if (now >= sess_timeout_time)
1216 nat44_ed_free_session_data (sm, s0, thread_index, 0);
1217 nat_ed_session_delete (sm, s0, thread_index, 1);
1219 // session is closed, go slow path
1224 b0->flags |= VNET_BUFFER_F_IS_NATED;
1226 if (nat_6t_t_eq (&s0->i2o.match, &lookup))
1230 else if (s0->flags & SNAT_SESSION_FLAG_HAIRPINNING &&
1231 nat_6t_t_eq (&s0->o2i.match, &lookup))
1237 translation_error = NAT_ED_TRNSL_ERR_FLOW_MISMATCH;
1238 nat44_ed_free_session_data (sm, s0, thread_index, 0);
1239 nat_ed_session_delete (sm, s0, thread_index, 1);
1241 next[0] = NAT_NEXT_DROP;
1242 b0->error = node->errors[NAT_IN2OUT_ED_ERROR_TRNSL_FAILED];
1246 if (NAT_ED_TRNSL_ERR_SUCCESS !=
1247 (translation_error = nat_6t_flow_buf_translate_i2o (
1248 vm, sm, b0, ip0, f, proto0, is_output_feature)))
1250 nat44_ed_free_session_data (sm, s0, thread_index, 0);
1251 nat_ed_session_delete (sm, s0, thread_index, 1);
1253 next[0] = NAT_NEXT_DROP;
1254 b0->error = node->errors[NAT_IN2OUT_ED_ERROR_TRNSL_FAILED];
1260 case IP_PROTOCOL_TCP:
1261 vlib_increment_simple_counter (&sm->counters.fastpath.in2out.tcp,
1262 thread_index, cntr_sw_if_index0, 1);
1263 nat44_set_tcp_session_state_i2o (
1264 sm, now, s0, vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags,
1267 case IP_PROTOCOL_UDP:
1268 vlib_increment_simple_counter (&sm->counters.fastpath.in2out.udp,
1269 thread_index, cntr_sw_if_index0, 1);
1271 case IP_PROTOCOL_ICMP:
1272 vlib_increment_simple_counter (&sm->counters.fastpath.in2out.icmp,
1273 thread_index, cntr_sw_if_index0, 1);
1276 vlib_increment_simple_counter (&sm->counters.fastpath.in2out.other,
1277 thread_index, cntr_sw_if_index0, 1);
1282 nat44_session_update_counters (s0, now,
1283 vlib_buffer_length_in_chain (vm, b0),
1285 /* Per-user LRU list maintenance */
1286 nat44_session_update_lru (sm, s0, thread_index);
1290 ((node->flags & VLIB_NODE_FLAG_TRACE)
1291 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
1293 nat_in2out_ed_trace_t *t =
1294 vlib_add_trace (vm, node, b0, sizeof (*t));
1295 t->sw_if_index = rx_sw_if_index0;
1296 t->next_index = next[0];
1297 t->is_slow_path = 0;
1298 t->translation_error = translation_error;
1299 t->lookup_skipped = lookup_skipped;
1300 clib_memcpy (&t->search_key, &kv0, sizeof (t->search_key));
1304 t->session_index = s0 - tsm->sessions;
1305 clib_memcpy (&t->i2of, &s0->i2o, sizeof (t->i2of));
1306 clib_memcpy (&t->o2if, &s0->o2i, sizeof (t->o2if));
1307 t->translation_via_i2of = (&s0->i2o == f);
1308 t->tcp_state = s0->tcp_state;
1312 t->session_index = ~0;
1316 if (next[0] == NAT_NEXT_DROP)
1318 vlib_increment_simple_counter (&sm->counters.fastpath.in2out.drops,
1319 thread_index, cntr_sw_if_index0, 1);
1326 vlib_buffer_enqueue_to_next (vm, node, from, (u16 *) nexts,
1328 return frame->n_vectors;
1332 nat44_ed_in2out_slow_path_node_fn_inline (vlib_main_t *vm,
1333 vlib_node_runtime_t *node,
1334 vlib_frame_t *frame,
1335 int is_output_feature,
1336 int is_multi_worker)
1338 u32 n_left_from, *from;
1339 snat_main_t *sm = &snat_main;
1340 f64 now = vlib_time_now (vm);
1341 u32 thread_index = vm->thread_index;
1342 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
1344 from = vlib_frame_vector_args (frame);
1345 n_left_from = frame->n_vectors;
1347 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
1348 u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
1349 vlib_get_buffers (vm, from, b, n_left_from);
1351 while (n_left_from > 0)
1354 u32 rx_sw_if_index0, rx_fib_index0, iph_offset0 = 0;
1355 u32 tx_sw_if_index0;
1356 u32 cntr_sw_if_index0;
1357 ip_protocol_t proto0;
1360 icmp46_header_t *icmp0;
1361 snat_session_t *s0 = 0;
1362 clib_bihash_kv_16_8_t kv0 = { 0 }, value0;
1363 int translation_error = NAT_ED_TRNSL_ERR_SUCCESS;
1367 if (is_output_feature)
1368 iph_offset0 = vnet_buffer (b0)->ip.reass.save_rewrite_length;
1370 next[0] = vnet_buffer2 (b0)->nat.arc_next;
1372 ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) +
1375 rx_sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
1376 tx_sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
1378 is_output_feature ? tx_sw_if_index0 : rx_sw_if_index0;
1379 rx_fib_index0 = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
1382 if (PREDICT_FALSE (!is_output_feature && ip0->ttl == 1))
1384 vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1385 icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
1386 ICMP4_time_exceeded_ttl_exceeded_in_transit,
1388 next[0] = NAT_NEXT_ICMP_ERROR;
1392 udp0 = ip4_next_header (ip0);
1393 icmp0 = (icmp46_header_t *) udp0;
1394 proto0 = ip0->protocol;
1396 if (PREDICT_FALSE (nat44_ed_is_unk_proto (proto0)))
1398 s0 = nat44_ed_in2out_slowpath_unknown_proto (
1399 sm, b0, ip0, rx_fib_index0, thread_index, now, vm, node);
1401 next[0] = NAT_NEXT_DROP;
1403 if (NAT_NEXT_DROP != next[0] && s0 &&
1404 NAT_ED_TRNSL_ERR_SUCCESS !=
1405 (translation_error = nat_6t_flow_buf_translate_i2o (
1406 vm, sm, b0, ip0, &s0->i2o, proto0, is_output_feature)))
1408 nat44_ed_free_session_data (sm, s0, thread_index, 0);
1409 nat_ed_session_delete (sm, s0, thread_index, 1);
1411 next[0] = NAT_NEXT_DROP;
1412 b0->error = node->errors[NAT_IN2OUT_ED_ERROR_TRNSL_FAILED];
1416 vlib_increment_simple_counter (&sm->counters.slowpath.in2out.other,
1417 thread_index, cntr_sw_if_index0, 1);
1421 if (PREDICT_FALSE (proto0 == IP_PROTOCOL_ICMP))
1423 next[0] = icmp_in2out_ed_slow_path (
1424 sm, b0, ip0, icmp0, rx_sw_if_index0, tx_sw_if_index0,
1425 rx_fib_index0, node, next[0], now, thread_index, &s0,
1427 if (NAT_NEXT_DROP != next[0] && s0 &&
1428 NAT_ED_TRNSL_ERR_SUCCESS !=
1429 (translation_error = nat_6t_flow_buf_translate_i2o (
1430 vm, sm, b0, ip0, &s0->i2o, proto0, is_output_feature)))
1432 nat44_ed_free_session_data (sm, s0, thread_index, 0);
1433 nat_ed_session_delete (sm, s0, thread_index, 1);
1435 next[0] = NAT_NEXT_DROP;
1436 b0->error = node->errors[NAT_IN2OUT_ED_ERROR_TRNSL_FAILED];
1440 if (NAT_NEXT_DROP != next[0])
1442 vlib_increment_simple_counter (
1443 &sm->counters.slowpath.in2out.icmp, thread_index,
1444 cntr_sw_if_index0, 1);
1450 &kv0, ip0->src_address.as_u32, vnet_buffer (b0)->ip.reass.l4_src_port,
1451 ip0->dst_address.as_u32, vnet_buffer (b0)->ip.reass.l4_dst_port,
1452 rx_fib_index0, ip0->protocol);
1453 if (!clib_bihash_search_16_8 (&sm->flow_hash, &kv0, &value0))
1455 ASSERT (thread_index == ed_value_get_thread_index (&value0));
1457 pool_elt_at_index (tsm->sessions,
1458 ed_value_get_session_index (&value0));
1463 if (is_output_feature)
1465 if (PREDICT_FALSE (nat44_ed_not_translate_output_feature (
1466 sm, b0, ip0, vnet_buffer (b0)->ip.reass.l4_src_port,
1467 vnet_buffer (b0)->ip.reass.l4_dst_port, thread_index,
1468 rx_sw_if_index0, tx_sw_if_index0, is_multi_worker)))
1472 * Send DHCP packets to the ipv4 stack, or we won't
1473 * be able to use dhcp client on the outside interface
1476 proto0 == IP_PROTOCOL_UDP &&
1477 (vnet_buffer (b0)->ip.reass.l4_dst_port ==
1478 clib_host_to_net_u16 (UDP_DST_PORT_dhcp_to_server)) &&
1479 ip0->dst_address.as_u32 == 0xffffffff))
1485 nat44_ed_not_translate (vm, node, rx_sw_if_index0, b0, ip0,
1486 proto0, rx_fib_index0)))
1491 slow_path_ed (vm, sm, b0, ip0->src_address, ip0->dst_address,
1492 vnet_buffer (b0)->ip.reass.l4_src_port,
1493 vnet_buffer (b0)->ip.reass.l4_dst_port,
1494 ip0->protocol, rx_fib_index0, tx_sw_if_index0, &s0,
1495 node, next[0], thread_index, now);
1497 if (PREDICT_FALSE (next[0] == NAT_NEXT_DROP))
1500 if (PREDICT_FALSE (!s0))
1505 b0->flags |= VNET_BUFFER_F_IS_NATED;
1507 if (NAT_ED_TRNSL_ERR_SUCCESS !=
1508 (translation_error = nat_6t_flow_buf_translate_i2o (
1509 vm, sm, b0, ip0, &s0->i2o, proto0, is_output_feature)))
1511 nat44_ed_free_session_data (sm, s0, thread_index, 0);
1512 nat_ed_session_delete (sm, s0, thread_index, 1);
1514 next[0] = NAT_NEXT_DROP;
1515 b0->error = node->errors[NAT_IN2OUT_ED_ERROR_TRNSL_FAILED];
1519 if (PREDICT_TRUE (proto0 == IP_PROTOCOL_TCP))
1521 vlib_increment_simple_counter (&sm->counters.slowpath.in2out.tcp,
1522 thread_index, cntr_sw_if_index0, 1);
1523 nat44_set_tcp_session_state_i2o (
1524 sm, now, s0, vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags,
1529 vlib_increment_simple_counter (&sm->counters.slowpath.in2out.udp,
1530 thread_index, cntr_sw_if_index0, 1);
1534 nat44_session_update_counters (s0, now,
1535 vlib_buffer_length_in_chain
1536 (vm, b0), thread_index);
1537 /* Per-user LRU list maintenance */
1538 nat44_session_update_lru (sm, s0, thread_index);
1541 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
1542 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
1544 nat_in2out_ed_trace_t *t =
1545 vlib_add_trace (vm, node, b0, sizeof (*t));
1546 t->sw_if_index = rx_sw_if_index0;
1547 t->next_index = next[0];
1548 t->is_slow_path = 1;
1549 t->translation_error = translation_error;
1550 clib_memcpy (&t->search_key, &kv0, sizeof (t->search_key));
1554 t->session_index = s0 - tsm->sessions;
1555 clib_memcpy (&t->i2of, &s0->i2o, sizeof (t->i2of));
1556 clib_memcpy (&t->o2if, &s0->o2i, sizeof (t->o2if));
1557 t->translation_via_i2of = 1;
1558 t->tcp_state = s0->tcp_state;
1563 t->session_index = ~0;
1567 if (next[0] == NAT_NEXT_DROP)
1569 vlib_increment_simple_counter (&sm->counters.slowpath.in2out.drops,
1570 thread_index, cntr_sw_if_index0, 1);
1578 vlib_buffer_enqueue_to_next (vm, node, from, (u16 *) nexts,
1581 return frame->n_vectors;
1584 VLIB_NODE_FN (nat44_ed_in2out_node) (vlib_main_t * vm,
1585 vlib_node_runtime_t * node,
1586 vlib_frame_t * frame)
1588 if (snat_main.num_workers > 1)
1590 return nat44_ed_in2out_fast_path_node_fn_inline (vm, node, frame, 0, 1);
1594 return nat44_ed_in2out_fast_path_node_fn_inline (vm, node, frame, 0, 0);
1598 VLIB_REGISTER_NODE (nat44_ed_in2out_node) = {
1599 .name = "nat44-ed-in2out",
1600 .vector_size = sizeof (u32),
1601 .sibling_of = "nat-default",
1602 .format_trace = format_nat_in2out_ed_trace,
1603 .type = VLIB_NODE_TYPE_INTERNAL,
1604 .n_errors = ARRAY_LEN (nat_in2out_ed_error_strings),
1605 .error_strings = nat_in2out_ed_error_strings,
1606 .runtime_data_bytes = sizeof (snat_runtime_t),
1609 VLIB_NODE_FN (nat44_ed_in2out_output_node) (vlib_main_t * vm,
1610 vlib_node_runtime_t * node,
1611 vlib_frame_t * frame)
1613 if (snat_main.num_workers > 1)
1615 return nat44_ed_in2out_fast_path_node_fn_inline (vm, node, frame, 1, 1);
1619 return nat44_ed_in2out_fast_path_node_fn_inline (vm, node, frame, 1, 0);
1623 VLIB_REGISTER_NODE (nat44_ed_in2out_output_node) = {
1624 .name = "nat44-ed-in2out-output",
1625 .vector_size = sizeof (u32),
1626 .sibling_of = "nat-default",
1627 .format_trace = format_nat_in2out_ed_trace,
1628 .type = VLIB_NODE_TYPE_INTERNAL,
1629 .n_errors = ARRAY_LEN (nat_in2out_ed_error_strings),
1630 .error_strings = nat_in2out_ed_error_strings,
1631 .runtime_data_bytes = sizeof (snat_runtime_t),
1634 VLIB_NODE_FN (nat44_ed_in2out_slowpath_node) (vlib_main_t * vm,
1635 vlib_node_runtime_t *
1636 node, vlib_frame_t * frame)
1638 if (snat_main.num_workers > 1)
1640 return nat44_ed_in2out_slow_path_node_fn_inline (vm, node, frame, 0, 1);
1644 return nat44_ed_in2out_slow_path_node_fn_inline (vm, node, frame, 0, 0);
1648 VLIB_REGISTER_NODE (nat44_ed_in2out_slowpath_node) = {
1649 .name = "nat44-ed-in2out-slowpath",
1650 .vector_size = sizeof (u32),
1651 .sibling_of = "nat-default",
1652 .format_trace = format_nat_in2out_ed_trace,
1653 .type = VLIB_NODE_TYPE_INTERNAL,
1654 .n_errors = ARRAY_LEN (nat_in2out_ed_error_strings),
1655 .error_strings = nat_in2out_ed_error_strings,
1656 .runtime_data_bytes = sizeof (snat_runtime_t),
1659 VLIB_NODE_FN (nat44_ed_in2out_output_slowpath_node) (vlib_main_t * vm,
1662 vlib_frame_t * frame)
1664 if (snat_main.num_workers > 1)
1666 return nat44_ed_in2out_slow_path_node_fn_inline (vm, node, frame, 1, 1);
1670 return nat44_ed_in2out_slow_path_node_fn_inline (vm, node, frame, 1, 0);
1674 VLIB_REGISTER_NODE (nat44_ed_in2out_output_slowpath_node) = {
1675 .name = "nat44-ed-in2out-output-slowpath",
1676 .vector_size = sizeof (u32),
1677 .sibling_of = "nat-default",
1678 .format_trace = format_nat_in2out_ed_trace,
1679 .type = VLIB_NODE_TYPE_INTERNAL,
1680 .n_errors = ARRAY_LEN (nat_in2out_ed_error_strings),
1681 .error_strings = nat_in2out_ed_error_strings,
1682 .runtime_data_bytes = sizeof (snat_runtime_t),
1686 format_nat_pre_trace (u8 * s, va_list * args)
1688 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
1689 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
1690 nat_pre_trace_t *t = va_arg (*args, nat_pre_trace_t *);
1691 return format (s, "in2out next_index %d arc_next_index %d", t->next_index,
1695 VLIB_NODE_FN (nat_pre_in2out_node)
1696 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
1698 return nat_pre_node_fn_inline (vm, node, frame,
1699 NAT_NEXT_IN2OUT_ED_FAST_PATH);
1702 VLIB_NODE_FN (nat_pre_in2out_output_node)
1703 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
1705 return nat_pre_node_fn_inline (vm, node, frame,
1706 NAT_NEXT_IN2OUT_ED_OUTPUT_FAST_PATH);
1709 VLIB_REGISTER_NODE (nat_pre_in2out_node) = {
1710 .name = "nat-pre-in2out",
1711 .vector_size = sizeof (u32),
1712 .sibling_of = "nat-default",
1713 .format_trace = format_nat_pre_trace,
1714 .type = VLIB_NODE_TYPE_INTERNAL,
1718 VLIB_REGISTER_NODE (nat_pre_in2out_output_node) = {
1719 .name = "nat-pre-in2out-output",
1720 .vector_size = sizeof (u32),
1721 .sibling_of = "nat-default",
1722 .format_trace = format_nat_pre_trace,
1723 .type = VLIB_NODE_TYPE_INTERNAL,
1728 * fd.io coding-style-patch-verification: ON
1731 * eval: (c-set-style "gnu")