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);
526 nat_6t_flow_saddr_rewrite_set (&s->o2i, r_addr.as_u32);
528 if (nat_ed_alloc_addr_and_port (
529 sm, rx_fib_index, tx_sw_if_index, proto, thread_index, l_addr,
530 r_addr, tsm->snat_thread_index, s, &outside_addr, &outside_port))
532 nat_elog_notice (sm, "addresses exhausted");
533 b->error = node->errors[NAT_IN2OUT_ED_ERROR_OUT_OF_PORTS];
534 nat_ed_session_delete (sm, s, thread_index, 1);
535 return NAT_NEXT_DROP;
537 s->out2in.addr = outside_addr;
538 s->out2in.port = outside_port;
543 s->out2in.addr = outside_addr = sm_addr;
544 s->out2in.port = outside_port = sm_port;
545 s->in2out.addr = l_addr;
546 s->in2out.port = l_port;
548 s->in2out.fib_index = rx_fib_index;
549 s->out2in.fib_index = tx_fib_index;
550 s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING;
553 int is_hairpinning = nat44_ed_external_sm_lookup (sm, r_addr, r_port,
554 proto, &daddr, &dport);
555 s->flags |= is_hairpinning * SNAT_SESSION_FLAG_HAIRPINNING;
557 if (IP_PROTOCOL_ICMP == proto)
559 nat_6t_o2i_flow_init (sm, thread_index, s, daddr, sm_port, sm_addr,
560 sm_port, s->out2in.fib_index, proto);
561 nat_6t_flow_icmp_id_rewrite_set (&s->o2i, l_port);
565 nat_6t_o2i_flow_init (sm, thread_index, s, daddr, dport, sm_addr,
566 sm_port, s->out2in.fib_index, proto);
567 nat_6t_flow_dport_rewrite_set (&s->o2i, l_port);
569 nat_6t_flow_daddr_rewrite_set (&s->o2i, l_addr.as_u32);
570 nat_6t_flow_txfib_rewrite_set (&s->o2i, rx_fib_index);
571 nat_6t_flow_saddr_rewrite_set (&s->o2i, r_addr.as_u32);
572 if (nat_ed_ses_o2i_flow_hash_add_del (sm, thread_index, s, 2))
574 nat_elog_notice (sm, "out2in key add failed");
580 s->flags |= SNAT_SESSION_FLAG_LOAD_BALANCING;
581 s->ext_host_addr = r_addr;
582 s->ext_host_port = r_port;
584 nat_6t_i2o_flow_init (sm, thread_index, s, l_addr, l_port, r_addr, r_port,
585 rx_fib_index, proto);
586 nat_6t_flow_saddr_rewrite_set (&s->i2o, outside_addr.as_u32);
587 nat_6t_flow_daddr_rewrite_set (&s->i2o, daddr.as_u32);
589 if (IP_PROTOCOL_ICMP == proto)
591 nat_6t_flow_icmp_id_rewrite_set (&s->i2o, outside_port);
595 nat_6t_flow_sport_rewrite_set (&s->i2o, outside_port);
596 nat_6t_flow_dport_rewrite_set (&s->i2o, dport);
598 nat_6t_flow_txfib_rewrite_set (&s->i2o, tx_fib_index);
600 if (nat_ed_ses_i2o_flow_hash_add_del (sm, thread_index, s, 1))
602 nat_elog_notice (sm, "in2out key add failed");
607 nat_ipfix_logging_nat44_ses_create (
608 thread_index, s->in2out.addr.as_u32, s->out2in.addr.as_u32, s->proto,
609 s->in2out.port, s->out2in.port, s->in2out.fib_index);
611 nat_syslog_nat44_sadd (0, s->in2out.fib_index, &s->in2out.addr,
612 s->in2out.port, &s->ext_host_nat_addr,
613 s->ext_host_nat_port, &s->out2in.addr, s->out2in.port,
614 &s->ext_host_addr, s->ext_host_port, s->proto, 0);
616 per_vrf_sessions_register_session (s, thread_index);
623 nat_ed_session_delete (sm, s, thread_index, 1);
625 *sessionp = s = NULL;
626 return NAT_NEXT_DROP;
629 static_always_inline int
630 nat44_ed_not_translate (vlib_main_t *vm, vlib_node_runtime_t *node,
631 u32 sw_if_index, vlib_buffer_t *b, ip4_header_t *ip,
632 u32 proto, u32 rx_fib_index)
634 snat_main_t *sm = &snat_main;
636 clib_bihash_kv_16_8_t kv, value;
637 ip4_address_t placeholder_addr;
638 u32 placeholder_fib_index;
639 u16 placeholder_port;
641 init_ed_k (&kv, ip->dst_address.as_u32,
642 vnet_buffer (b)->ip.reass.l4_dst_port, ip->src_address.as_u32,
643 vnet_buffer (b)->ip.reass.l4_src_port, sm->outside_fib_index,
646 // do nat if active session or is static mapping
647 if (!clib_bihash_search_16_8 (&sm->flow_hash, &kv, &value) ||
648 !snat_static_mapping_match (
649 vm, ip->dst_address, vnet_buffer (b)->ip.reass.l4_dst_port,
650 sm->outside_fib_index, proto, &placeholder_addr, &placeholder_port,
651 &placeholder_fib_index, 1, 0, 0, 0, 0, 0, 0))
656 // do not nat if forwarding enabled
657 if (sm->forwarding_enabled)
662 // do not nat packet aimed at the interface address
664 is_interface_addr (sm, node, sw_if_index, ip->dst_address.as_u32)))
669 // do nat packets with resolvable destination
670 // destination can be resolved either by:
671 // a) vrf routing table entry
672 // b) (non output feature) outside interface fib
673 if (is_destination_resolvable (rx_fib_index, ip->dst_address))
681 static_always_inline int
682 nat_not_translate_output_feature_fwd (snat_main_t * sm, ip4_header_t * ip,
683 u32 thread_index, f64 now,
684 vlib_main_t * vm, vlib_buffer_t * b)
686 clib_bihash_kv_16_8_t kv, value;
687 snat_session_t *s = 0;
688 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
690 if (!sm->forwarding_enabled)
693 if (ip->protocol == IP_PROTOCOL_ICMP)
695 ip4_address_t lookup_saddr, lookup_daddr;
696 u16 lookup_sport, lookup_dport;
698 if (nat_get_icmp_session_lookup_values (b, ip, &lookup_saddr,
699 &lookup_sport, &lookup_daddr,
700 &lookup_dport, &lookup_protocol))
702 init_ed_k (&kv, lookup_saddr.as_u32, lookup_sport, lookup_daddr.as_u32,
703 lookup_dport, 0, lookup_protocol);
705 else if (ip->protocol == IP_PROTOCOL_UDP || ip->protocol == IP_PROTOCOL_TCP)
707 init_ed_k (&kv, ip->src_address.as_u32,
708 vnet_buffer (b)->ip.reass.l4_src_port, ip->dst_address.as_u32,
709 vnet_buffer (b)->ip.reass.l4_dst_port, 0, ip->protocol);
713 init_ed_k (&kv, ip->src_address.as_u32, 0, ip->dst_address.as_u32, 0, 0,
717 if (!clib_bihash_search_16_8 (&sm->flow_hash, &kv, &value))
719 ASSERT (thread_index == ed_value_get_thread_index (&value));
721 pool_elt_at_index (tsm->sessions,
722 ed_value_get_session_index (&value));
724 if (na44_ed_is_fwd_bypass_session (s))
726 if (ip->protocol == IP_PROTOCOL_TCP)
728 nat44_set_tcp_session_state_i2o (
729 sm, now, s, vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags,
733 nat44_session_update_counters (s, now,
734 vlib_buffer_length_in_chain (vm, b),
736 /* Per-user LRU list maintenance */
737 nat44_session_update_lru (sm, s, thread_index);
747 static_always_inline int
748 nat44_ed_not_translate_output_feature (snat_main_t *sm, vlib_buffer_t *b,
749 ip4_header_t *ip, u16 src_port,
750 u16 dst_port, u32 thread_index,
751 u32 rx_sw_if_index, u32 tx_sw_if_index,
754 clib_bihash_kv_16_8_t kv, value;
755 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
758 u32 rx_fib_index = ip4_fib_table_get_index_for_sw_if_index (rx_sw_if_index);
759 u32 tx_fib_index = ip4_fib_table_get_index_for_sw_if_index (tx_sw_if_index);
762 init_ed_k (&kv, ip->src_address.as_u32, src_port, ip->dst_address.as_u32,
763 dst_port, tx_fib_index, ip->protocol);
764 if (!clib_bihash_search_16_8 (&sm->flow_hash, &kv, &value))
766 ASSERT (thread_index == ed_value_get_thread_index (&value));
768 pool_elt_at_index (tsm->sessions,
769 ed_value_get_session_index (&value));
774 if (is_multi_worker &&
775 PREDICT_TRUE (!pool_is_free_index (
776 tsm->sessions, vnet_buffer2 (b)->nat.cached_dst_nat_session_index)))
779 lookup.fib_index = rx_fib_index;
780 lookup.proto = ip->protocol;
781 lookup.daddr.as_u32 = ip->src_address.as_u32;
782 lookup.dport = src_port;
783 lookup.saddr.as_u32 = ip->dst_address.as_u32;
784 lookup.sport = dst_port;
785 s = pool_elt_at_index (
786 tsm->sessions, vnet_buffer2 (b)->nat.cached_dst_nat_session_index);
787 if (PREDICT_TRUE (nat_6t_t_eq (&s->i2o.match, &lookup)))
789 goto skip_dst_nat_lookup;
794 init_ed_k (&kv, ip->dst_address.as_u32, dst_port, ip->src_address.as_u32,
795 src_port, rx_fib_index, ip->protocol);
796 if (!clib_bihash_search_16_8 (&sm->flow_hash, &kv, &value))
798 ASSERT (thread_index == ed_value_get_thread_index (&value));
800 pool_elt_at_index (tsm->sessions,
801 ed_value_get_session_index (&value));
804 if (na44_ed_is_fwd_bypass_session (s))
808 pool_foreach (i, sm->output_feature_interfaces)
810 if ((nat44_ed_is_interface_inside (i)) &&
811 (rx_sw_if_index == i->sw_if_index))
821 icmp_in2out_ed_slow_path (snat_main_t *sm, vlib_buffer_t *b, ip4_header_t *ip,
822 icmp46_header_t *icmp, u32 sw_if_index,
823 u32 tx_sw_if_index, u32 rx_fib_index,
824 vlib_node_runtime_t *node, u32 next, f64 now,
825 u32 thread_index, snat_session_t **s_p,
828 vlib_main_t *vm = vlib_get_main ();
831 snat_session_t *s = NULL;
832 u8 lookup_protocol = ip->protocol;
833 u16 lookup_sport, lookup_dport;
834 ip4_address_t lookup_saddr, lookup_daddr;
836 err = nat_get_icmp_session_lookup_values (b, ip, &lookup_saddr,
837 &lookup_sport, &lookup_daddr,
838 &lookup_dport, &lookup_protocol);
841 b->error = node->errors[err];
842 return NAT_NEXT_DROP;
845 if (tx_sw_if_index != ~0)
847 if (PREDICT_FALSE (nat44_ed_not_translate_output_feature (
848 sm, b, ip, lookup_sport, lookup_dport, thread_index, sw_if_index,
849 tx_sw_if_index, is_multi_worker)))
856 if (PREDICT_FALSE (nat44_ed_not_translate (
857 vm, node, sw_if_index, b, ip, IP_PROTOCOL_ICMP, rx_fib_index)))
863 if (PREDICT_FALSE (icmp_type_is_error_message (
864 vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags)))
866 b->error = node->errors[NAT_IN2OUT_ED_ERROR_BAD_ICMP_TYPE];
867 return NAT_NEXT_DROP;
871 slow_path_ed (vm, sm, b, ip->src_address, ip->dst_address, lookup_sport,
872 lookup_dport, ip->protocol, rx_fib_index, tx_sw_if_index, &s,
873 node, next, thread_index, vlib_time_now (vm));
875 if (NAT_NEXT_DROP == next)
878 if (PREDICT_TRUE (!ip4_is_fragment (ip)))
880 ip_csum_t sum = ip_incremental_checksum_buffer (
881 vm, b, (u8 *) icmp - (u8 *) vlib_buffer_get_current (b),
882 ntohs (ip->length) - ip4_header_bytes (ip), 0);
883 checksum = ~ip_csum_fold (sum);
884 if (PREDICT_FALSE (checksum != 0 && checksum != 0xffff))
886 next = NAT_NEXT_DROP;
892 if (PREDICT_TRUE (next != NAT_NEXT_DROP && s))
895 nat44_session_update_counters (
896 s, now, vlib_buffer_length_in_chain (vm, b), thread_index);
897 /* Per-user LRU list maintenance */
898 nat44_session_update_lru (sm, s, thread_index);
904 static snat_session_t *
905 nat44_ed_in2out_slowpath_unknown_proto (snat_main_t *sm, vlib_buffer_t *b,
906 ip4_header_t *ip, u32 rx_fib_index,
907 u32 thread_index, f64 now,
909 vlib_node_runtime_t *node)
911 clib_bihash_kv_16_8_t s_kv, s_value;
912 snat_static_mapping_t *m = NULL;
913 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
914 snat_session_t *s = NULL;
917 ip4_address_t new_src_addr = { 0 };
918 ip4_address_t new_dst_addr = ip->dst_address;
921 nat44_ed_maximum_sessions_exceeded (sm, rx_fib_index, thread_index)))
923 b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_SESSIONS_EXCEEDED];
924 nat_ipfix_logging_max_sessions (thread_index,
925 sm->max_translations_per_thread);
926 nat_elog_notice (sm, "maximum sessions exceeded");
930 tx_fib_index = get_tx_fib_index (rx_fib_index, ip->dst_address);
932 // Try to find static mapping first
933 m = nat44_ed_sm_i2o_lookup (sm, ip->src_address, 0, rx_fib_index,
937 new_src_addr = m->external_addr;
941 pool_foreach (s, tsm->sessions)
943 if (s->ext_host_addr.as_u32 == ip->dst_address.as_u32)
945 init_ed_k (&s_kv, s->out2in.addr.as_u32, 0,
946 ip->dst_address.as_u32, 0, tx_fib_index,
948 if (clib_bihash_search_16_8 (&sm->flow_hash, &s_kv, &s_value))
950 new_src_addr = s->out2in.addr;
956 if (!new_src_addr.as_u32)
958 for (i = 0; i < vec_len (sm->addresses); i++)
960 init_ed_k (&s_kv, sm->addresses[i].addr.as_u32, 0,
961 ip->dst_address.as_u32, 0, tx_fib_index,
963 if (clib_bihash_search_16_8 (&sm->flow_hash, &s_kv, &s_value))
965 new_src_addr = sm->addresses[i].addr;
971 if (!new_src_addr.as_u32)
973 // could not allocate address for translation ...
977 s = nat_ed_session_alloc (sm, thread_index, now, ip->protocol);
980 b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_SESSIONS_EXCEEDED];
981 nat_elog_warn (sm, "create NAT session failed");
985 nat_6t_i2o_flow_init (sm, thread_index, s, ip->src_address, 0,
986 ip->dst_address, 0, rx_fib_index, ip->protocol);
987 nat_6t_flow_saddr_rewrite_set (&s->i2o, new_src_addr.as_u32);
988 nat_6t_flow_txfib_rewrite_set (&s->i2o, tx_fib_index);
991 int is_hairpinning = nat44_ed_external_sm_lookup (
992 sm, ip->dst_address, 0, ip->protocol, &new_dst_addr, NULL);
993 s->flags |= is_hairpinning * SNAT_SESSION_FLAG_HAIRPINNING;
995 nat_6t_flow_daddr_rewrite_set (&s->i2o, new_dst_addr.as_u32);
996 nat_6t_flow_txfib_rewrite_set (&s->i2o, tx_fib_index);
998 nat_6t_o2i_flow_init (sm, thread_index, s, new_dst_addr, 0, new_src_addr, 0,
999 tx_fib_index, ip->protocol);
1000 nat_6t_flow_saddr_rewrite_set (&s->o2i, ip->dst_address.as_u32);
1001 nat_6t_flow_daddr_rewrite_set (&s->o2i, ip->src_address.as_u32);
1002 nat_6t_flow_txfib_rewrite_set (&s->o2i, rx_fib_index);
1004 s->ext_host_addr.as_u32 = ip->dst_address.as_u32;
1005 s->out2in.addr.as_u32 = new_src_addr.as_u32;
1006 s->out2in.fib_index = tx_fib_index;
1007 s->in2out.addr.as_u32 = ip->src_address.as_u32;
1008 s->in2out.fib_index = rx_fib_index;
1009 s->in2out.port = s->out2in.port = ip->protocol;
1011 s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING;
1013 if (nat_ed_ses_i2o_flow_hash_add_del (sm, thread_index, s, 1))
1015 nat_elog_notice (sm, "in2out flow hash add failed");
1016 nat_ed_session_delete (sm, s, thread_index, 1);
1020 if (nat_ed_ses_o2i_flow_hash_add_del (sm, thread_index, s, 1))
1022 nat_elog_notice (sm, "out2in flow hash add failed");
1023 nat_ed_session_delete (sm, s, thread_index, 1);
1027 per_vrf_sessions_register_session (s, thread_index);
1030 nat44_session_update_counters (s, now, vlib_buffer_length_in_chain (vm, b),
1032 /* Per-user LRU list maintenance */
1033 nat44_session_update_lru (sm, s, thread_index);
1039 nat44_ed_in2out_fast_path_node_fn_inline (vlib_main_t *vm,
1040 vlib_node_runtime_t *node,
1041 vlib_frame_t *frame,
1042 int is_output_feature,
1043 int is_multi_worker)
1045 u32 n_left_from, *from;
1046 snat_main_t *sm = &snat_main;
1047 f64 now = vlib_time_now (vm);
1048 u32 thread_index = vm->thread_index;
1049 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
1050 u32 def_slow = is_output_feature ? NAT_NEXT_IN2OUT_ED_OUTPUT_SLOW_PATH
1051 : NAT_NEXT_IN2OUT_ED_SLOW_PATH;
1053 from = vlib_frame_vector_args (frame);
1054 n_left_from = frame->n_vectors;
1056 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
1057 u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
1058 vlib_get_buffers (vm, from, b, n_left_from);
1060 while (n_left_from > 0)
1063 u32 rx_sw_if_index0, rx_fib_index0, iph_offset0 = 0;
1064 u32 tx_sw_if_index0;
1065 u32 cntr_sw_if_index0;
1066 ip_protocol_t proto0;
1068 snat_session_t *s0 = 0;
1069 clib_bihash_kv_16_8_t kv0 = { 0 }, value0;
1070 nat_translation_error_e translation_error = NAT_ED_TRNSL_ERR_SUCCESS;
1071 nat_6t_flow_t *f = 0;
1073 int lookup_skipped = 0;
1078 /* Prefetch next iteration. */
1079 if (PREDICT_TRUE (n_left_from >= 2))
1085 vlib_prefetch_buffer_header (p2, LOAD);
1087 clib_prefetch_load (p2->data);
1090 if (is_output_feature)
1092 iph_offset0 = vnet_buffer (b0)->ip.reass.save_rewrite_length;
1095 next[0] = vnet_buffer2 (b0)->nat.arc_next;
1098 (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) + iph_offset0);
1100 rx_sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
1101 tx_sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
1103 is_output_feature ? tx_sw_if_index0 : rx_sw_if_index0;
1104 rx_fib_index0 = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
1106 lookup.fib_index = rx_fib_index0;
1108 if (PREDICT_FALSE (!is_output_feature && ip0->ttl == 1))
1110 vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1111 icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
1112 ICMP4_time_exceeded_ttl_exceeded_in_transit,
1114 next[0] = NAT_NEXT_ICMP_ERROR;
1118 proto0 = ip0->protocol;
1120 if (is_output_feature)
1123 (nat_not_translate_output_feature_fwd
1124 (sm, ip0, thread_index, now, vm, b0)))
1128 if (PREDICT_FALSE (proto0 == IP_PROTOCOL_ICMP))
1130 if (vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags !=
1131 ICMP4_echo_request &&
1132 vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags !=
1134 !icmp_type_is_error_message (
1135 vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags))
1137 b0->error = node->errors[NAT_IN2OUT_ED_ERROR_BAD_ICMP_TYPE];
1138 next[0] = NAT_NEXT_DROP;
1141 int err = nat_get_icmp_session_lookup_values (
1142 b0, ip0, &lookup.saddr, &lookup.sport, &lookup.daddr,
1143 &lookup.dport, &lookup.proto);
1146 b0->error = node->errors[err];
1147 next[0] = NAT_NEXT_DROP;
1153 lookup.proto = ip0->protocol;
1154 lookup.saddr.as_u32 = ip0->src_address.as_u32;
1155 lookup.daddr.as_u32 = ip0->dst_address.as_u32;
1156 lookup.sport = vnet_buffer (b0)->ip.reass.l4_src_port;
1157 lookup.dport = vnet_buffer (b0)->ip.reass.l4_dst_port;
1160 /* there might be a stashed index in vnet_buffer2 from handoff or
1161 * classify node, see if it can be used */
1162 if (is_multi_worker &&
1163 !pool_is_free_index (tsm->sessions,
1164 vnet_buffer2 (b0)->nat.cached_session_index))
1166 s0 = pool_elt_at_index (tsm->sessions,
1167 vnet_buffer2 (b0)->nat.cached_session_index);
1169 nat_6t_t_eq (&s0->i2o.match, &lookup)
1170 // for some hairpinning cases there are two "i2i" flows instead
1171 // of i2o and o2i as both hosts are on inside
1172 || (s0->flags & SNAT_SESSION_FLAG_HAIRPINNING &&
1173 nat_6t_t_eq (&s0->o2i.match, &lookup))))
1175 /* yes, this is the droid we're looking for */
1182 init_ed_k (&kv0, lookup.saddr.as_u32, lookup.sport, lookup.daddr.as_u32,
1183 lookup.dport, lookup.fib_index, lookup.proto);
1186 if (clib_bihash_search_16_8 (&sm->flow_hash, &kv0, &value0))
1188 // flow does not exist go slow path
1193 ASSERT (thread_index == ed_value_get_thread_index (&value0));
1195 pool_elt_at_index (tsm->sessions,
1196 ed_value_get_session_index (&value0));
1200 ASSERT (thread_index == s0->thread_index);
1202 if (PREDICT_FALSE (per_vrf_sessions_is_expired (s0, thread_index)))
1204 // session is closed, go slow path
1205 nat44_ed_free_session_data (sm, s0, thread_index, 0);
1206 nat_ed_session_delete (sm, s0, thread_index, 1);
1212 // drop if session expired
1213 u64 sess_timeout_time;
1215 s0->last_heard + (f64) nat44_session_get_timeout (sm, s0);
1216 if (now >= sess_timeout_time)
1218 nat44_ed_free_session_data (sm, s0, thread_index, 0);
1219 nat_ed_session_delete (sm, s0, thread_index, 1);
1221 // session is closed, go slow path
1226 b0->flags |= VNET_BUFFER_F_IS_NATED;
1228 if (nat_6t_t_eq (&s0->i2o.match, &lookup))
1232 else if (s0->flags & SNAT_SESSION_FLAG_HAIRPINNING &&
1233 nat_6t_t_eq (&s0->o2i.match, &lookup))
1239 translation_error = NAT_ED_TRNSL_ERR_FLOW_MISMATCH;
1240 nat44_ed_free_session_data (sm, s0, thread_index, 0);
1241 nat_ed_session_delete (sm, s0, thread_index, 1);
1243 next[0] = NAT_NEXT_DROP;
1244 b0->error = node->errors[NAT_IN2OUT_ED_ERROR_TRNSL_FAILED];
1248 if (NAT_ED_TRNSL_ERR_SUCCESS !=
1249 (translation_error = nat_6t_flow_buf_translate_i2o (
1250 vm, sm, b0, ip0, f, proto0, is_output_feature)))
1252 nat44_ed_free_session_data (sm, s0, thread_index, 0);
1253 nat_ed_session_delete (sm, s0, thread_index, 1);
1255 next[0] = NAT_NEXT_DROP;
1256 b0->error = node->errors[NAT_IN2OUT_ED_ERROR_TRNSL_FAILED];
1262 case IP_PROTOCOL_TCP:
1263 vlib_increment_simple_counter (&sm->counters.fastpath.in2out.tcp,
1264 thread_index, cntr_sw_if_index0, 1);
1265 nat44_set_tcp_session_state_i2o (
1266 sm, now, s0, vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags,
1269 case IP_PROTOCOL_UDP:
1270 vlib_increment_simple_counter (&sm->counters.fastpath.in2out.udp,
1271 thread_index, cntr_sw_if_index0, 1);
1273 case IP_PROTOCOL_ICMP:
1274 vlib_increment_simple_counter (&sm->counters.fastpath.in2out.icmp,
1275 thread_index, cntr_sw_if_index0, 1);
1278 vlib_increment_simple_counter (&sm->counters.fastpath.in2out.other,
1279 thread_index, cntr_sw_if_index0, 1);
1284 nat44_session_update_counters (s0, now,
1285 vlib_buffer_length_in_chain (vm, b0),
1287 /* Per-user LRU list maintenance */
1288 nat44_session_update_lru (sm, s0, thread_index);
1292 ((node->flags & VLIB_NODE_FLAG_TRACE)
1293 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
1295 nat_in2out_ed_trace_t *t =
1296 vlib_add_trace (vm, node, b0, sizeof (*t));
1297 t->sw_if_index = rx_sw_if_index0;
1298 t->next_index = next[0];
1299 t->is_slow_path = 0;
1300 t->translation_error = translation_error;
1301 t->lookup_skipped = lookup_skipped;
1302 clib_memcpy (&t->search_key, &kv0, sizeof (t->search_key));
1306 t->session_index = s0 - tsm->sessions;
1307 clib_memcpy (&t->i2of, &s0->i2o, sizeof (t->i2of));
1308 clib_memcpy (&t->o2if, &s0->o2i, sizeof (t->o2if));
1309 t->translation_via_i2of = (&s0->i2o == f);
1310 t->tcp_state = s0->tcp_state;
1314 t->session_index = ~0;
1318 if (next[0] == NAT_NEXT_DROP)
1320 vlib_increment_simple_counter (&sm->counters.fastpath.in2out.drops,
1321 thread_index, cntr_sw_if_index0, 1);
1328 vlib_buffer_enqueue_to_next (vm, node, from, (u16 *) nexts,
1330 return frame->n_vectors;
1334 nat44_ed_in2out_slow_path_node_fn_inline (vlib_main_t *vm,
1335 vlib_node_runtime_t *node,
1336 vlib_frame_t *frame,
1337 int is_output_feature,
1338 int is_multi_worker)
1340 u32 n_left_from, *from;
1341 snat_main_t *sm = &snat_main;
1342 f64 now = vlib_time_now (vm);
1343 u32 thread_index = vm->thread_index;
1344 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
1346 from = vlib_frame_vector_args (frame);
1347 n_left_from = frame->n_vectors;
1349 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
1350 u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
1351 vlib_get_buffers (vm, from, b, n_left_from);
1353 while (n_left_from > 0)
1356 u32 rx_sw_if_index0, rx_fib_index0, iph_offset0 = 0;
1357 u32 tx_sw_if_index0;
1358 u32 cntr_sw_if_index0;
1359 ip_protocol_t proto0;
1362 icmp46_header_t *icmp0;
1363 snat_session_t *s0 = 0;
1364 clib_bihash_kv_16_8_t kv0 = { 0 }, value0;
1365 int translation_error = NAT_ED_TRNSL_ERR_SUCCESS;
1369 if (is_output_feature)
1370 iph_offset0 = vnet_buffer (b0)->ip.reass.save_rewrite_length;
1372 next[0] = vnet_buffer2 (b0)->nat.arc_next;
1374 ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) +
1377 rx_sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
1378 tx_sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
1380 is_output_feature ? tx_sw_if_index0 : rx_sw_if_index0;
1381 rx_fib_index0 = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
1384 if (PREDICT_FALSE (!is_output_feature && ip0->ttl == 1))
1386 vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1387 icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
1388 ICMP4_time_exceeded_ttl_exceeded_in_transit,
1390 next[0] = NAT_NEXT_ICMP_ERROR;
1394 udp0 = ip4_next_header (ip0);
1395 icmp0 = (icmp46_header_t *) udp0;
1396 proto0 = ip0->protocol;
1398 if (PREDICT_FALSE (nat44_ed_is_unk_proto (proto0)))
1400 s0 = nat44_ed_in2out_slowpath_unknown_proto (
1401 sm, b0, ip0, rx_fib_index0, thread_index, now, vm, node);
1403 next[0] = NAT_NEXT_DROP;
1405 if (NAT_NEXT_DROP != next[0] && s0 &&
1406 NAT_ED_TRNSL_ERR_SUCCESS !=
1407 (translation_error = nat_6t_flow_buf_translate_i2o (
1408 vm, sm, b0, ip0, &s0->i2o, proto0, is_output_feature)))
1410 nat44_ed_free_session_data (sm, s0, thread_index, 0);
1411 nat_ed_session_delete (sm, s0, thread_index, 1);
1413 next[0] = NAT_NEXT_DROP;
1414 b0->error = node->errors[NAT_IN2OUT_ED_ERROR_TRNSL_FAILED];
1418 vlib_increment_simple_counter (&sm->counters.slowpath.in2out.other,
1419 thread_index, cntr_sw_if_index0, 1);
1423 if (PREDICT_FALSE (proto0 == IP_PROTOCOL_ICMP))
1425 next[0] = icmp_in2out_ed_slow_path (
1426 sm, b0, ip0, icmp0, rx_sw_if_index0, tx_sw_if_index0,
1427 rx_fib_index0, node, next[0], now, thread_index, &s0,
1429 if (NAT_NEXT_DROP != next[0] && s0 &&
1430 NAT_ED_TRNSL_ERR_SUCCESS !=
1431 (translation_error = nat_6t_flow_buf_translate_i2o (
1432 vm, sm, b0, ip0, &s0->i2o, proto0, is_output_feature)))
1434 nat44_ed_free_session_data (sm, s0, thread_index, 0);
1435 nat_ed_session_delete (sm, s0, thread_index, 1);
1437 next[0] = NAT_NEXT_DROP;
1438 b0->error = node->errors[NAT_IN2OUT_ED_ERROR_TRNSL_FAILED];
1442 if (NAT_NEXT_DROP != next[0])
1444 vlib_increment_simple_counter (
1445 &sm->counters.slowpath.in2out.icmp, thread_index,
1446 cntr_sw_if_index0, 1);
1452 &kv0, ip0->src_address.as_u32, vnet_buffer (b0)->ip.reass.l4_src_port,
1453 ip0->dst_address.as_u32, vnet_buffer (b0)->ip.reass.l4_dst_port,
1454 rx_fib_index0, ip0->protocol);
1455 if (!clib_bihash_search_16_8 (&sm->flow_hash, &kv0, &value0))
1457 ASSERT (thread_index == ed_value_get_thread_index (&value0));
1459 pool_elt_at_index (tsm->sessions,
1460 ed_value_get_session_index (&value0));
1465 if (is_output_feature)
1467 if (PREDICT_FALSE (nat44_ed_not_translate_output_feature (
1468 sm, b0, ip0, vnet_buffer (b0)->ip.reass.l4_src_port,
1469 vnet_buffer (b0)->ip.reass.l4_dst_port, thread_index,
1470 rx_sw_if_index0, tx_sw_if_index0, is_multi_worker)))
1474 * Send DHCP packets to the ipv4 stack, or we won't
1475 * be able to use dhcp client on the outside interface
1478 proto0 == IP_PROTOCOL_UDP &&
1479 (vnet_buffer (b0)->ip.reass.l4_dst_port ==
1480 clib_host_to_net_u16 (UDP_DST_PORT_dhcp_to_server)) &&
1481 ip0->dst_address.as_u32 == 0xffffffff))
1487 nat44_ed_not_translate (vm, node, rx_sw_if_index0, b0, ip0,
1488 proto0, rx_fib_index0)))
1493 slow_path_ed (vm, sm, b0, ip0->src_address, ip0->dst_address,
1494 vnet_buffer (b0)->ip.reass.l4_src_port,
1495 vnet_buffer (b0)->ip.reass.l4_dst_port,
1496 ip0->protocol, rx_fib_index0, tx_sw_if_index0, &s0,
1497 node, next[0], thread_index, now);
1499 if (PREDICT_FALSE (next[0] == NAT_NEXT_DROP))
1502 if (PREDICT_FALSE (!s0))
1507 b0->flags |= VNET_BUFFER_F_IS_NATED;
1509 if (NAT_ED_TRNSL_ERR_SUCCESS !=
1510 (translation_error = nat_6t_flow_buf_translate_i2o (
1511 vm, sm, b0, ip0, &s0->i2o, proto0, is_output_feature)))
1513 nat44_ed_free_session_data (sm, s0, thread_index, 0);
1514 nat_ed_session_delete (sm, s0, thread_index, 1);
1516 next[0] = NAT_NEXT_DROP;
1517 b0->error = node->errors[NAT_IN2OUT_ED_ERROR_TRNSL_FAILED];
1521 if (PREDICT_TRUE (proto0 == IP_PROTOCOL_TCP))
1523 vlib_increment_simple_counter (&sm->counters.slowpath.in2out.tcp,
1524 thread_index, cntr_sw_if_index0, 1);
1525 nat44_set_tcp_session_state_i2o (
1526 sm, now, s0, vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags,
1531 vlib_increment_simple_counter (&sm->counters.slowpath.in2out.udp,
1532 thread_index, cntr_sw_if_index0, 1);
1536 nat44_session_update_counters (s0, now,
1537 vlib_buffer_length_in_chain
1538 (vm, b0), thread_index);
1539 /* Per-user LRU list maintenance */
1540 nat44_session_update_lru (sm, s0, thread_index);
1543 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
1544 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
1546 nat_in2out_ed_trace_t *t =
1547 vlib_add_trace (vm, node, b0, sizeof (*t));
1548 t->sw_if_index = rx_sw_if_index0;
1549 t->next_index = next[0];
1550 t->is_slow_path = 1;
1551 t->translation_error = translation_error;
1552 clib_memcpy (&t->search_key, &kv0, sizeof (t->search_key));
1556 t->session_index = s0 - tsm->sessions;
1557 clib_memcpy (&t->i2of, &s0->i2o, sizeof (t->i2of));
1558 clib_memcpy (&t->o2if, &s0->o2i, sizeof (t->o2if));
1559 t->translation_via_i2of = 1;
1560 t->tcp_state = s0->tcp_state;
1565 t->session_index = ~0;
1569 if (next[0] == NAT_NEXT_DROP)
1571 vlib_increment_simple_counter (&sm->counters.slowpath.in2out.drops,
1572 thread_index, cntr_sw_if_index0, 1);
1580 vlib_buffer_enqueue_to_next (vm, node, from, (u16 *) nexts,
1583 return frame->n_vectors;
1586 VLIB_NODE_FN (nat44_ed_in2out_node) (vlib_main_t * vm,
1587 vlib_node_runtime_t * node,
1588 vlib_frame_t * frame)
1590 if (snat_main.num_workers > 1)
1592 return nat44_ed_in2out_fast_path_node_fn_inline (vm, node, frame, 0, 1);
1596 return nat44_ed_in2out_fast_path_node_fn_inline (vm, node, frame, 0, 0);
1600 VLIB_REGISTER_NODE (nat44_ed_in2out_node) = {
1601 .name = "nat44-ed-in2out",
1602 .vector_size = sizeof (u32),
1603 .sibling_of = "nat-default",
1604 .format_trace = format_nat_in2out_ed_trace,
1605 .type = VLIB_NODE_TYPE_INTERNAL,
1606 .n_errors = ARRAY_LEN (nat_in2out_ed_error_strings),
1607 .error_strings = nat_in2out_ed_error_strings,
1608 .runtime_data_bytes = sizeof (snat_runtime_t),
1611 VLIB_NODE_FN (nat44_ed_in2out_output_node) (vlib_main_t * vm,
1612 vlib_node_runtime_t * node,
1613 vlib_frame_t * frame)
1615 if (snat_main.num_workers > 1)
1617 return nat44_ed_in2out_fast_path_node_fn_inline (vm, node, frame, 1, 1);
1621 return nat44_ed_in2out_fast_path_node_fn_inline (vm, node, frame, 1, 0);
1625 VLIB_REGISTER_NODE (nat44_ed_in2out_output_node) = {
1626 .name = "nat44-ed-in2out-output",
1627 .vector_size = sizeof (u32),
1628 .sibling_of = "nat-default",
1629 .format_trace = format_nat_in2out_ed_trace,
1630 .type = VLIB_NODE_TYPE_INTERNAL,
1631 .n_errors = ARRAY_LEN (nat_in2out_ed_error_strings),
1632 .error_strings = nat_in2out_ed_error_strings,
1633 .runtime_data_bytes = sizeof (snat_runtime_t),
1636 VLIB_NODE_FN (nat44_ed_in2out_slowpath_node) (vlib_main_t * vm,
1637 vlib_node_runtime_t *
1638 node, vlib_frame_t * frame)
1640 if (snat_main.num_workers > 1)
1642 return nat44_ed_in2out_slow_path_node_fn_inline (vm, node, frame, 0, 1);
1646 return nat44_ed_in2out_slow_path_node_fn_inline (vm, node, frame, 0, 0);
1650 VLIB_REGISTER_NODE (nat44_ed_in2out_slowpath_node) = {
1651 .name = "nat44-ed-in2out-slowpath",
1652 .vector_size = sizeof (u32),
1653 .sibling_of = "nat-default",
1654 .format_trace = format_nat_in2out_ed_trace,
1655 .type = VLIB_NODE_TYPE_INTERNAL,
1656 .n_errors = ARRAY_LEN (nat_in2out_ed_error_strings),
1657 .error_strings = nat_in2out_ed_error_strings,
1658 .runtime_data_bytes = sizeof (snat_runtime_t),
1661 VLIB_NODE_FN (nat44_ed_in2out_output_slowpath_node) (vlib_main_t * vm,
1664 vlib_frame_t * frame)
1666 if (snat_main.num_workers > 1)
1668 return nat44_ed_in2out_slow_path_node_fn_inline (vm, node, frame, 1, 1);
1672 return nat44_ed_in2out_slow_path_node_fn_inline (vm, node, frame, 1, 0);
1676 VLIB_REGISTER_NODE (nat44_ed_in2out_output_slowpath_node) = {
1677 .name = "nat44-ed-in2out-output-slowpath",
1678 .vector_size = sizeof (u32),
1679 .sibling_of = "nat-default",
1680 .format_trace = format_nat_in2out_ed_trace,
1681 .type = VLIB_NODE_TYPE_INTERNAL,
1682 .n_errors = ARRAY_LEN (nat_in2out_ed_error_strings),
1683 .error_strings = nat_in2out_ed_error_strings,
1684 .runtime_data_bytes = sizeof (snat_runtime_t),
1688 format_nat_pre_trace (u8 * s, va_list * args)
1690 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
1691 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
1692 nat_pre_trace_t *t = va_arg (*args, nat_pre_trace_t *);
1693 return format (s, "in2out next_index %d arc_next_index %d", t->next_index,
1697 VLIB_NODE_FN (nat_pre_in2out_node)
1698 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
1700 return nat_pre_node_fn_inline (vm, node, frame,
1701 NAT_NEXT_IN2OUT_ED_FAST_PATH);
1704 VLIB_NODE_FN (nat_pre_in2out_output_node)
1705 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
1707 return nat_pre_node_fn_inline (vm, node, frame,
1708 NAT_NEXT_IN2OUT_ED_OUTPUT_FAST_PATH);
1711 VLIB_REGISTER_NODE (nat_pre_in2out_node) = {
1712 .name = "nat-pre-in2out",
1713 .vector_size = sizeof (u32),
1714 .sibling_of = "nat-default",
1715 .format_trace = format_nat_pre_trace,
1716 .type = VLIB_NODE_TYPE_INTERNAL,
1720 VLIB_REGISTER_NODE (nat_pre_in2out_output_node) = {
1721 .name = "nat-pre-in2out-output",
1722 .vector_size = sizeof (u32),
1723 .sibling_of = "nat-default",
1724 .format_trace = format_nat_pre_trace,
1725 .type = VLIB_NODE_TYPE_INTERNAL,
1730 * fd.io coding-style-patch-verification: ON
1733 * eval: (c-set-style "gnu")