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/pg/pg.h>
23 #include <vnet/ip/ip.h>
24 #include <vnet/ethernet/ethernet.h>
25 #include <vnet/fib/ip4_fib.h>
26 #include <vnet/udp/udp.h>
27 #include <vppinfra/error.h>
29 #include <nat/nat_ipfix_logging.h>
30 #include <nat/nat_inlines.h>
31 #include <nat/nat44/inlines.h>
32 #include <nat/nat_syslog.h>
33 #include <nat/nat_ha.h>
35 static char *nat_in2out_ed_error_strings[] = {
36 #define _(sym,string) string,
37 foreach_nat_in2out_ed_error
47 } nat_in2out_ed_trace_t;
50 format_nat_in2out_ed_trace (u8 * s, va_list * args)
52 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
53 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
54 nat_in2out_ed_trace_t *t = va_arg (*args, nat_in2out_ed_trace_t *);
58 t->is_slow_path ? "NAT44_IN2OUT_ED_SLOW_PATH" :
59 "NAT44_IN2OUT_ED_FAST_PATH";
61 s = format (s, "%s: sw_if_index %d, next index %d, session %d", tag,
62 t->sw_if_index, t->next_index, t->session_index);
67 #ifndef CLIB_MARCH_VARIANT
69 nat44_i2o_ed_is_idle_session_cb (clib_bihash_kv_16_8_t * kv, void *arg)
71 snat_main_t *sm = &snat_main;
72 nat44_is_idle_session_ctx_t *ctx = arg;
74 u64 sess_timeout_time;
75 nat_ed_ses_key_t ed_key;
76 clib_bihash_kv_16_8_t ed_kv;
79 snat_session_key_t key;
80 snat_main_per_thread_data_t *tsm = vec_elt_at_index (sm->per_thread_data,
83 s = pool_elt_at_index (tsm->sessions, kv->value);
84 sess_timeout_time = s->last_heard + (f64) nat44_session_get_timeout (sm, s);
85 if (ctx->now >= sess_timeout_time)
87 if (is_fwd_bypass_session (s))
90 ed_key.l_addr = s->out2in.addr;
91 ed_key.r_addr = s->ext_host_addr;
92 ed_key.fib_index = s->out2in.fib_index;
93 if (snat_is_unk_proto_session (s))
95 ed_key.proto = s->in2out.port;
101 ed_key.proto = snat_proto_to_ip_proto (s->in2out.protocol);
102 ed_key.l_port = s->out2in.port;
103 ed_key.r_port = s->ext_host_port;
105 ed_kv.key[0] = ed_key.as_u64[0];
106 ed_kv.key[1] = ed_key.as_u64[1];
107 if (clib_bihash_add_del_16_8 (&tsm->out2in_ed, &ed_kv, 0))
108 nat_elog_warn ("out2in_ed key del failed");
110 if (snat_is_unk_proto_session (s))
113 snat_ipfix_logging_nat44_ses_delete (ctx->thread_index,
114 s->in2out.addr.as_u32,
115 s->out2in.addr.as_u32,
119 s->in2out.fib_index);
121 nat_syslog_nat44_sdel (s->user_index, s->in2out.fib_index,
122 &s->in2out.addr, s->in2out.port,
123 &s->ext_host_nat_addr, s->ext_host_nat_port,
124 &s->out2in.addr, s->out2in.port,
125 &s->ext_host_addr, s->ext_host_port,
126 s->in2out.protocol, is_twice_nat_session (s));
128 nat_ha_sdel (&s->out2in.addr, s->out2in.port, &s->ext_host_addr,
129 s->ext_host_port, s->out2in.protocol, s->out2in.fib_index,
132 if (is_twice_nat_session (s))
134 for (i = 0; i < vec_len (sm->twice_nat_addresses); i++)
136 key.protocol = s->in2out.protocol;
137 key.port = s->ext_host_nat_port;
138 a = sm->twice_nat_addresses + i;
139 if (a->addr.as_u32 == s->ext_host_nat_addr.as_u32)
141 snat_free_outside_address_and_port (sm->twice_nat_addresses,
149 if (snat_is_session_static (s))
152 snat_free_outside_address_and_port (sm->addresses, ctx->thread_index,
155 nat44_ed_delete_session (sm, s, ctx->thread_index, 1);
164 icmp_in2out_ed_slow_path (snat_main_t * sm, vlib_buffer_t * b0,
165 ip4_header_t * ip0, icmp46_header_t * icmp0,
166 u32 sw_if_index0, u32 rx_fib_index0,
167 vlib_node_runtime_t * node, u32 next0, f64 now,
168 u32 thread_index, snat_session_t ** p_s0)
170 next0 = icmp_in2out (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
171 next0, thread_index, p_s0, 0);
172 snat_session_t *s0 = *p_s0;
173 if (PREDICT_TRUE (next0 != NAT_NEXT_DROP && s0))
176 nat44_session_update_counters (s0, now,
177 vlib_buffer_length_in_chain
178 (sm->vlib_main, b0), thread_index);
179 /* Per-user LRU list maintenance */
180 nat44_session_update_lru (sm, s0, thread_index);
185 static_always_inline u16
186 snat_random_port (u16 min, u16 max)
188 snat_main_t *sm = &snat_main;
189 return min + random_u32 (&sm->random_seed) /
190 (random_u32_max () / (max - min + 1) + 1);
194 nat_ed_alloc_addr_and_port (snat_main_t * sm, u32 fib_index,
195 u32 thread_index, nat_ed_ses_key_t * key,
196 snat_session_key_t * key1, u16 port_per_thread,
197 u32 snat_thread_index,
199 clib_bihash_kv_16_8_t * out2in_ed_kv)
202 snat_address_t *a, *ga = 0;
204 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
206 const u16 port_thread_offset = (port_per_thread * snat_thread_index) + 1024;
208 for (i = 0; i < vec_len (sm->addresses); i++)
210 a = sm->addresses + i;
211 switch (key1->protocol)
213 #define _(N, j, n, unused) \
214 case SNAT_PROTOCOL_##N: \
215 if (a->fib_index == fib_index) \
217 u16 port = snat_random_port (1, port_per_thread); \
218 u16 attempts = port_per_thread; \
219 while (attempts > 0) \
222 portnum = port_thread_offset + port; \
223 make_ed_kv (out2in_ed_kv, &a->addr, &key->r_addr, key->proto, \
224 s->out2in.fib_index, clib_host_to_net_u16 (portnum), \
226 out2in_ed_kv->value = s - tsm->sessions; \
227 int rv = clib_bihash_add_del_16_8 (&tsm->out2in_ed, out2in_ed_kv, \
231 ++a->busy_##n##_port_refcounts[portnum]; \
232 a->busy_##n##_ports_per_thread[thread_index]++; \
233 a->busy_##n##_ports++; \
234 key1->addr = a->addr; \
235 key1->port = clib_host_to_net_u16 (portnum); \
238 port = (port + 1) % port_per_thread; \
241 else if (a->fib_index == ~0) \
247 foreach_snat_protocol;
249 nat_elog_info ("unknown protocol");
256 /* fake fib_index to reuse macro */
259 switch (key1->protocol)
261 foreach_snat_protocol;
263 nat_elog_info ("unknown protocol");
270 /* Totally out of translations to use... */
271 snat_ipfix_logging_addresses_exhausted (thread_index, 0);
276 slow_path_ed (snat_main_t * sm,
279 clib_bihash_kv_16_8_t * kv,
280 snat_session_t ** sessionp,
281 vlib_node_runtime_t * node, u32 next, u32 thread_index, f64 now)
283 snat_session_t *s = NULL;
284 snat_session_key_t key0, key1;
285 lb_nat_type_t lb = 0;
286 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
287 nat_ed_ses_key_t *key = (nat_ed_ses_key_t *) kv->key;
288 u32 proto = ip_proto_to_snat_proto (key->proto);
289 nat_outside_fib_t *outside_fib;
290 fib_node_index_t fei = FIB_NODE_INDEX_INVALID;
291 clib_bihash_kv_16_8_t out2in_ed_kv;
292 bool out2in_ed_inserted = false;
295 .fp_proto = FIB_PROTOCOL_IP4,
298 .ip4.as_u32 = key->r_addr.as_u32,
301 nat44_is_idle_session_ctx_t ctx;
303 if (PREDICT_TRUE (proto == SNAT_PROTOCOL_TCP))
307 (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags)))
309 b->error = node->errors[NAT_IN2OUT_ED_ERROR_NON_SYN];
310 return NAT_NEXT_DROP;
314 if (PREDICT_FALSE (nat44_maximum_sessions_exceeded (sm, thread_index)))
316 if (!nat_global_lru_free_one (sm, thread_index, now))
318 b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_SESSIONS_EXCEEDED];
319 nat_ipfix_logging_max_sessions (thread_index, sm->max_translations);
320 nat_elog_notice ("maximum sessions exceeded");
321 return NAT_NEXT_DROP;
325 key0.addr = key->l_addr;
326 key0.port = key->l_port;
327 key1.protocol = key0.protocol = proto;
328 key0.fib_index = rx_fib_index;
329 key1.fib_index = sm->outside_fib_index;
331 /* First try to match static mapping by local address and port */
332 if (snat_static_mapping_match
333 (sm, key0, &key1, 0, 0, 0, &lb, 0, &identity_nat))
335 s = nat_ed_session_alloc (sm, thread_index, now);
338 nat_elog_warn ("create NAT session failed");
339 b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_USER_SESS_EXCEEDED];
342 switch (vec_len (sm->outside_fibs))
345 s->out2in.fib_index = sm->outside_fib_index;
348 s->out2in.fib_index = sm->outside_fibs[0].fib_index;
352 vec_foreach (outside_fib, sm->outside_fibs)
354 fei = fib_table_lookup (outside_fib->fib_index, &pfx);
355 if (FIB_NODE_INDEX_INVALID != fei)
357 if (fib_entry_get_resolving_interface (fei) != ~0)
359 s->out2in.fib_index = outside_fib->fib_index;
368 /* Try to create dynamic translation */
369 if (nat_ed_alloc_addr_and_port (sm, rx_fib_index,
370 thread_index, key, &key1,
372 tsm->snat_thread_index, s,
375 nat_elog_notice ("addresses exhausted");
376 b->error = node->errors[NAT_IN2OUT_ED_ERROR_OUT_OF_PORTS];
380 out2in_ed_inserted = true;
384 if (PREDICT_FALSE (identity_nat))
389 s = nat_ed_session_alloc (sm, thread_index, now);
392 nat_elog_warn ("create NAT session failed");
393 b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_USER_SESS_EXCEEDED];
396 switch (vec_len (sm->outside_fibs))
399 s->out2in.fib_index = sm->outside_fib_index;
402 s->out2in.fib_index = sm->outside_fibs[0].fib_index;
406 vec_foreach (outside_fib, sm->outside_fibs)
408 fei = fib_table_lookup (outside_fib->fib_index, &pfx);
409 if (FIB_NODE_INDEX_INVALID != fei)
411 if (fib_entry_get_resolving_interface (fei) != ~0)
413 s->out2in.fib_index = outside_fib->fib_index;
422 s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING;
425 make_ed_kv (&out2in_ed_kv, &key1.addr, &key->r_addr, key->proto,
426 s->out2in.fib_index, key1.port, key->r_port);
427 out2in_ed_kv.value = s - tsm->sessions;
428 if (clib_bihash_add_or_overwrite_stale_16_8
429 (&tsm->out2in_ed, &out2in_ed_kv, nat44_o2i_ed_is_idle_session_cb,
431 nat_elog_notice ("out2in-ed key add failed");
432 out2in_ed_inserted = true;
436 s->flags |= SNAT_SESSION_FLAG_LOAD_BALANCING;
437 s->flags |= SNAT_SESSION_FLAG_ENDPOINT_DEPENDENT;
438 s->ext_host_addr = key->r_addr;
439 s->ext_host_port = key->r_port;
442 s->out2in.protocol = key0.protocol;
444 kv->value = s - tsm->sessions;
446 ctx.thread_index = thread_index;
447 if (clib_bihash_add_or_overwrite_stale_16_8 (&tsm->in2out_ed, kv,
448 nat44_i2o_ed_is_idle_session_cb,
450 nat_elog_notice ("in2out-ed key add failed");
455 snat_ipfix_logging_nat44_ses_create (thread_index,
456 s->in2out.addr.as_u32,
457 s->out2in.addr.as_u32,
460 s->out2in.port, s->in2out.fib_index);
462 nat_syslog_nat44_sadd (s->user_index, s->in2out.fib_index,
463 &s->in2out.addr, s->in2out.port,
464 &s->ext_host_nat_addr, s->ext_host_nat_port,
465 &s->out2in.addr, s->out2in.port,
466 &s->ext_host_addr, s->ext_host_port,
467 s->in2out.protocol, 0);
469 nat_ha_sadd (&s->in2out.addr, s->in2out.port, &s->out2in.addr,
470 s->out2in.port, &s->ext_host_addr, s->ext_host_port,
471 &s->ext_host_nat_addr, s->ext_host_nat_port,
472 s->in2out.protocol, s->in2out.fib_index, s->flags,
477 if (out2in_ed_inserted)
479 if (clib_bihash_add_del_16_8 (&tsm->out2in_ed, &out2in_ed_kv, 0))
480 nat_elog_notice ("out2in-ed key del failed");
484 nat_free_session_data (sm, s, thread_index, 0);
485 nat44_ed_delete_session (sm, s, thread_index, 1);
487 return NAT_NEXT_DROP;
490 static_always_inline int
491 nat44_ed_not_translate (snat_main_t * sm, vlib_node_runtime_t * node,
492 u32 sw_if_index, ip4_header_t * ip, u32 proto,
493 u32 rx_fib_index, u32 thread_index)
495 udp_header_t *udp = ip4_next_header (ip);
496 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
497 clib_bihash_kv_16_8_t kv, value;
498 snat_session_key_t key0, key1;
500 make_ed_kv (&kv, &ip->dst_address, &ip->src_address, ip->protocol,
501 sm->outside_fib_index, udp->dst_port, udp->src_port);
503 /* NAT packet aimed at external address if */
504 /* has active sessions */
505 if (clib_bihash_search_16_8 (&tsm->out2in_ed, &kv, &value))
507 key0.addr = ip->dst_address;
508 key0.port = udp->dst_port;
509 key0.protocol = proto;
510 key0.fib_index = sm->outside_fib_index;
511 /* or is static mappings */
512 if (!snat_static_mapping_match (sm, key0, &key1, 1, 0, 0, 0, 0, 0))
518 if (sm->forwarding_enabled)
521 return snat_not_translate_fast (sm, node, sw_if_index, ip, proto,
525 static_always_inline int
526 nat_not_translate_output_feature_fwd (snat_main_t * sm, ip4_header_t * ip,
527 u32 thread_index, f64 now,
528 vlib_main_t * vm, vlib_buffer_t * b)
530 nat_ed_ses_key_t key;
531 clib_bihash_kv_16_8_t kv, value;
532 snat_session_t *s = 0;
533 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
535 if (!sm->forwarding_enabled)
538 if (ip->protocol == IP_PROTOCOL_ICMP)
540 key.as_u64[0] = key.as_u64[1] = 0;
541 if (get_icmp_i2o_ed_key (b, ip, &key))
544 kv.key[0] = key.as_u64[0];
545 kv.key[1] = key.as_u64[1];
547 else if (ip->protocol == IP_PROTOCOL_UDP || ip->protocol == IP_PROTOCOL_TCP)
549 make_ed_kv (&kv, &ip->src_address, &ip->dst_address, ip->protocol, 0,
550 vnet_buffer (b)->ip.reass.l4_src_port,
551 vnet_buffer (b)->ip.reass.l4_dst_port);
555 make_ed_kv (&kv, &ip->src_address, &ip->dst_address, ip->protocol, 0, 0,
559 if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &kv, &value))
561 s = pool_elt_at_index (tsm->sessions, value.value);
562 if (is_fwd_bypass_session (s))
564 if (ip->protocol == IP_PROTOCOL_TCP)
566 if (nat44_set_tcp_session_state_i2o
567 (sm, now, s, b, thread_index))
571 nat44_session_update_counters (s, now,
572 vlib_buffer_length_in_chain (vm, b),
574 /* Per-user LRU list maintenance */
575 nat44_session_update_lru (sm, s, thread_index);
585 static_always_inline int
586 nat44_ed_not_translate_output_feature (snat_main_t * sm, ip4_header_t * ip,
587 u8 proto, u16 src_port, u16 dst_port,
588 u32 thread_index, u32 rx_sw_if_index,
591 clib_bihash_kv_16_8_t kv, value;
592 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
595 u32 rx_fib_index = ip4_fib_table_get_index_for_sw_if_index (rx_sw_if_index);
596 u32 tx_fib_index = ip4_fib_table_get_index_for_sw_if_index (tx_sw_if_index);
599 make_ed_kv (&kv, &ip->src_address, &ip->dst_address, proto, tx_fib_index,
601 if (!clib_bihash_search_16_8 (&tsm->out2in_ed, &kv, &value))
603 s = pool_elt_at_index (tsm->sessions, value.value);
604 if (nat44_is_ses_closed (s))
606 nat_free_session_data (sm, s, thread_index, 0);
607 nat44_ed_delete_session (sm, s, thread_index, 1);
610 s->flags |= SNAT_SESSION_FLAG_OUTPUT_FEATURE;
615 make_ed_kv (&kv, &ip->dst_address, &ip->src_address, proto, rx_fib_index,
617 if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &kv, &value))
619 s = pool_elt_at_index (tsm->sessions, value.value);
620 if (is_fwd_bypass_session (s))
625 pool_foreach (i, sm->output_feature_interfaces,
627 if ((nat_interface_is_inside (i)) && (rx_sw_if_index == i->sw_if_index))
637 #ifndef CLIB_MARCH_VARIANT
639 icmp_match_in2out_ed (snat_main_t * sm, vlib_node_runtime_t * node,
640 u32 thread_index, vlib_buffer_t * b, ip4_header_t * ip,
641 u8 * p_proto, snat_session_key_t * p_value,
642 u8 * p_dont_translate, void *d, void *e)
646 nat_ed_ses_key_t key;
647 snat_session_t *s = 0;
648 u8 dont_translate = 0;
649 clib_bihash_kv_16_8_t kv, value;
652 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
654 sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_RX];
655 rx_fib_index = ip4_fib_table_get_index_for_sw_if_index (sw_if_index);
657 key.as_u64[0] = key.as_u64[1] = 0;
658 err = get_icmp_i2o_ed_key (b, ip, &key);
661 b->error = node->errors[err];
662 next = NAT_NEXT_DROP;
665 key.fib_index = rx_fib_index;
667 kv.key[0] = key.as_u64[0];
668 kv.key[1] = key.as_u64[1];
670 if (clib_bihash_search_16_8 (&tsm->in2out_ed, &kv, &value))
672 if (vnet_buffer (b)->sw_if_index[VLIB_TX] != ~0)
675 (nat44_ed_not_translate_output_feature
676 (sm, ip, key.proto, key.l_port, key.r_port, thread_index,
677 sw_if_index, vnet_buffer (b)->sw_if_index[VLIB_TX])))
685 if (PREDICT_FALSE (nat44_ed_not_translate (sm, node, sw_if_index,
686 ip, SNAT_PROTOCOL_ICMP,
696 (icmp_type_is_error_message
697 (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags)))
699 b->error = node->errors[NAT_IN2OUT_ED_ERROR_BAD_ICMP_TYPE];
700 next = NAT_NEXT_DROP;
704 next = slow_path_ed (sm, b, rx_fib_index, &kv, &s, node, next,
705 thread_index, vlib_time_now (sm->vlib_main));
707 if (PREDICT_FALSE (next == NAT_NEXT_DROP))
719 (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags !=
721 && vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags !=
723 && !icmp_type_is_error_message (vnet_buffer (b)->ip.
724 reass.icmp_type_or_tcp_flags)))
726 b->error = node->errors[NAT_IN2OUT_ED_ERROR_BAD_ICMP_TYPE];
727 next = NAT_NEXT_DROP;
731 s = pool_elt_at_index (tsm->sessions, value.value);
734 *p_proto = ip_proto_to_snat_proto (key.proto);
737 *p_value = s->out2in;
738 *p_dont_translate = dont_translate;
740 *(snat_session_t **) d = s;
745 static snat_session_t *
746 nat44_ed_in2out_unknown_proto (snat_main_t * sm,
752 vlib_main_t * vm, vlib_node_runtime_t * node)
754 clib_bihash_kv_8_8_t kv, value;
755 clib_bihash_kv_16_8_t s_kv, s_value;
756 snat_static_mapping_t *m;
757 u32 old_addr, new_addr = 0;
759 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
761 u32 outside_fib_index = sm->outside_fib_index;
764 nat_outside_fib_t *outside_fib;
765 fib_node_index_t fei = FIB_NODE_INDEX_INVALID;
767 .fp_proto = FIB_PROTOCOL_IP4,
770 .ip4.as_u32 = ip->dst_address.as_u32,
774 switch (vec_len (sm->outside_fibs))
777 outside_fib_index = sm->outside_fib_index;
780 outside_fib_index = sm->outside_fibs[0].fib_index;
784 vec_foreach (outside_fib, sm->outside_fibs)
786 fei = fib_table_lookup (outside_fib->fib_index, &pfx);
787 if (FIB_NODE_INDEX_INVALID != fei)
789 if (fib_entry_get_resolving_interface (fei) != ~0)
791 outside_fib_index = outside_fib->fib_index;
799 old_addr = ip->src_address.as_u32;
801 make_ed_kv (&s_kv, &ip->src_address, &ip->dst_address, ip->protocol,
804 if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &s_kv, &s_value))
806 s = pool_elt_at_index (tsm->sessions, s_value.value);
807 new_addr = ip->src_address.as_u32 = s->out2in.addr.as_u32;
811 if (PREDICT_FALSE (nat44_maximum_sessions_exceeded (sm, thread_index)))
813 b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_SESSIONS_EXCEEDED];
814 nat_ipfix_logging_max_sessions (thread_index, sm->max_translations);
815 nat_elog_notice ("maximum sessions exceeded");
819 make_sm_kv (&kv, &ip->src_address, 0, rx_fib_index, 0);
821 /* Try to find static mapping first */
822 if (!clib_bihash_search_8_8 (&sm->static_mapping_by_local, &kv, &value))
824 m = pool_elt_at_index (sm->static_mappings, value.value);
825 new_addr = ip->src_address.as_u32 = m->external_addr.as_u32;
832 pool_foreach (s, tsm->sessions, {
833 if (s->ext_host_addr.as_u32 == ip->dst_address.as_u32)
835 new_addr = ip->src_address.as_u32 = s->out2in.addr.as_u32;
837 make_ed_kv (&s_kv, &s->out2in.addr, &ip->dst_address, ip->protocol,
838 outside_fib_index, 0, 0);
839 if (clib_bihash_search_16_8 (&tsm->out2in_ed, &s_kv, &s_value))
847 for (i = 0; i < vec_len (sm->addresses); i++)
849 make_ed_kv (&s_kv, &sm->addresses[i].addr, &ip->dst_address,
850 ip->protocol, outside_fib_index, 0, 0);
851 if (clib_bihash_search_16_8 (&tsm->out2in_ed, &s_kv, &s_value))
853 new_addr = ip->src_address.as_u32 =
854 sm->addresses[i].addr.as_u32;
862 s = nat_ed_session_alloc (sm, thread_index, now);
865 b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_USER_SESS_EXCEEDED];
866 nat_elog_warn ("create NAT session failed");
870 s->ext_host_addr.as_u32 = ip->dst_address.as_u32;
871 s->flags |= SNAT_SESSION_FLAG_UNKNOWN_PROTO;
872 s->flags |= SNAT_SESSION_FLAG_ENDPOINT_DEPENDENT;
873 s->out2in.addr.as_u32 = new_addr;
874 s->out2in.fib_index = outside_fib_index;
875 s->in2out.addr.as_u32 = old_addr;
876 s->in2out.fib_index = rx_fib_index;
877 s->in2out.port = s->out2in.port = ip->protocol;
879 s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING;
881 /* Add to lookup tables */
882 make_ed_kv (&s_kv, &s->in2out.addr, &ip->dst_address, ip->protocol,
884 s_kv.value = s - tsm->sessions;
885 if (clib_bihash_add_del_16_8 (&tsm->in2out_ed, &s_kv, 1))
886 nat_elog_notice ("in2out key add failed");
888 make_ed_kv (&s_kv, &s->out2in.addr, &ip->dst_address, ip->protocol,
889 outside_fib_index, 0, 0);
890 s_kv.value = s - tsm->sessions;
891 if (clib_bihash_add_del_16_8 (&tsm->out2in_ed, &s_kv, 1))
892 nat_elog_notice ("out2in key add failed");
895 /* Update IP checksum */
897 sum = ip_csum_update (sum, old_addr, new_addr, ip4_header_t, src_address);
898 ip->checksum = ip_csum_fold (sum);
901 nat44_session_update_counters (s, now, vlib_buffer_length_in_chain (vm, b),
903 /* Per-user LRU list maintenance */
904 nat44_session_update_lru (sm, s, thread_index);
907 if (vnet_buffer (b)->sw_if_index[VLIB_TX] == ~0)
908 nat44_ed_hairpinning_unknown_proto (sm, b, ip);
910 if (vnet_buffer (b)->sw_if_index[VLIB_TX] == ~0)
911 vnet_buffer (b)->sw_if_index[VLIB_TX] = outside_fib_index;
917 nat44_ed_in2out_fast_path_node_fn_inline (vlib_main_t * vm,
918 vlib_node_runtime_t * node,
919 vlib_frame_t * frame,
920 int is_output_feature)
922 u32 n_left_from, *from, *to_next, pkts_processed = 0, stats_node_index;
923 nat_next_t next_index;
924 snat_main_t *sm = &snat_main;
925 f64 now = vlib_time_now (vm);
926 u32 thread_index = vm->thread_index;
927 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
928 u32 tcp_packets = 0, udp_packets = 0, icmp_packets = 0, other_packets =
931 def_slow = is_output_feature ? NAT_NEXT_IN2OUT_ED_OUTPUT_SLOW_PATH :
932 NAT_NEXT_IN2OUT_ED_SLOW_PATH;
934 stats_node_index = sm->ed_in2out_node_index;
936 from = vlib_frame_vector_args (frame);
937 n_left_from = frame->n_vectors;
938 next_index = node->cached_next_index;
940 while (n_left_from > 0)
944 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
946 while (n_left_from > 0 && n_left_to_next > 0)
950 u32 next0, sw_if_index0, rx_fib_index0, iph_offset0 = 0, proto0,
951 new_addr0, old_addr0;
952 u16 old_port0, new_port0;
956 snat_session_t *s0 = 0;
957 clib_bihash_kv_16_8_t kv0, value0;
960 /* speculatively enqueue b0 to the current next frame */
968 b0 = vlib_get_buffer (vm, bi0);
970 if (is_output_feature)
972 vnet_feature_next (&vnet_buffer2 (b0)->nat.arc_next, b0);
973 iph_offset0 = vnet_buffer (b0)->ip.reass.save_rewrite_length;
976 next0 = vnet_buffer2 (b0)->nat.arc_next;
978 ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) +
981 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
983 fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
986 if (PREDICT_FALSE (ip0->ttl == 1))
988 vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
989 icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
990 ICMP4_time_exceeded_ttl_exceeded_in_transit,
992 next0 = NAT_NEXT_ICMP_ERROR;
996 udp0 = ip4_next_header (ip0);
997 tcp0 = (tcp_header_t *) udp0;
998 proto0 = ip_proto_to_snat_proto (ip0->protocol);
1000 if (PREDICT_FALSE (proto0 == ~0))
1006 if (is_output_feature)
1008 if (PREDICT_FALSE (nat_not_translate_output_feature_fwd
1009 (sm, ip0, thread_index, now, vm, b0)))
1013 if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
1019 make_ed_kv (&kv0, &ip0->src_address, &ip0->dst_address,
1020 ip0->protocol, rx_fib_index0,
1021 vnet_buffer (b0)->ip.reass.l4_src_port,
1022 vnet_buffer (b0)->ip.reass.l4_dst_port);
1024 // lookup for session
1025 if (clib_bihash_search_16_8 (&tsm->in2out_ed, &kv0, &value0))
1027 // session does not exist go slow path
1031 s0 = pool_elt_at_index (tsm->sessions, value0.value);
1033 if (s0->tcp_close_timestamp)
1035 if (now >= s0->tcp_close_timestamp)
1037 // session is closed, go slow path
1042 // session in transitory timeout, drop
1043 b0->error = node->errors[NAT_IN2OUT_ED_ERROR_TCP_CLOSED];
1044 next0 = NAT_NEXT_DROP;
1049 // drop if session expired
1050 u64 sess_timeout_time;
1051 sess_timeout_time = s0->last_heard +
1052 (f64) nat44_session_get_timeout (sm, s0);
1053 if (now >= sess_timeout_time)
1055 nat_free_session_data (sm, s0, thread_index, 0);
1056 nat44_ed_delete_session (sm, s0, thread_index, 1);
1057 // session is closed, go slow path
1062 b0->flags |= VNET_BUFFER_F_IS_NATED;
1064 if (!is_output_feature)
1065 vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index;
1067 old_addr0 = ip0->src_address.as_u32;
1068 new_addr0 = ip0->src_address.as_u32 = s0->out2in.addr.as_u32;
1069 sum0 = ip0->checksum;
1070 sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
1072 if (PREDICT_FALSE (is_twice_nat_session (s0)))
1073 sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32,
1074 s0->ext_host_addr.as_u32, ip4_header_t,
1076 ip0->checksum = ip_csum_fold (sum0);
1078 old_port0 = vnet_buffer (b0)->ip.reass.l4_src_port;
1080 if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
1082 if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
1084 new_port0 = udp0->src_port = s0->out2in.port;
1085 sum0 = tcp0->checksum;
1087 ip_csum_update (sum0, old_addr0, new_addr0,
1088 ip4_header_t, dst_address);
1090 ip_csum_update (sum0, old_port0, new_port0,
1091 ip4_header_t, length);
1092 if (PREDICT_FALSE (is_twice_nat_session (s0)))
1095 ip_csum_update (sum0, ip0->dst_address.as_u32,
1096 s0->ext_host_addr.as_u32,
1097 ip4_header_t, dst_address);
1099 ip_csum_update (sum0,
1100 vnet_buffer (b0)->ip.
1101 reass.l4_dst_port, s0->ext_host_port,
1102 ip4_header_t, length);
1103 tcp0->dst_port = s0->ext_host_port;
1104 ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
1106 mss_clamping (sm, tcp0, &sum0);
1107 tcp0->checksum = ip_csum_fold (sum0);
1110 if (nat44_set_tcp_session_state_i2o
1111 (sm, now, s0, b0, thread_index))
1114 else if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment
1117 new_port0 = udp0->src_port = s0->out2in.port;
1118 sum0 = udp0->checksum;
1120 ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
1123 ip_csum_update (sum0, old_port0, new_port0, ip4_header_t,
1125 if (PREDICT_FALSE (is_twice_nat_session (s0)))
1127 sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32,
1128 s0->ext_host_addr.as_u32,
1129 ip4_header_t, dst_address);
1131 ip_csum_update (sum0,
1132 vnet_buffer (b0)->ip.reass.l4_dst_port,
1133 s0->ext_host_port, ip4_header_t, length);
1134 udp0->dst_port = s0->ext_host_port;
1135 ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
1137 udp0->checksum = ip_csum_fold (sum0);
1142 if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
1144 new_port0 = udp0->src_port = s0->out2in.port;
1145 if (PREDICT_FALSE (is_twice_nat_session (s0)))
1147 udp0->dst_port = s0->ext_host_port;
1148 ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
1155 nat44_session_update_counters (s0, now,
1156 vlib_buffer_length_in_chain
1157 (vm, b0), thread_index);
1158 /* Per-user LRU list maintenance */
1159 nat44_session_update_lru (sm, s0, thread_index);
1162 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
1163 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
1165 nat_in2out_ed_trace_t *t =
1166 vlib_add_trace (vm, node, b0, sizeof (*t));
1167 t->sw_if_index = sw_if_index0;
1168 t->next_index = next0;
1169 t->is_slow_path = 0;
1172 t->session_index = s0 - tsm->sessions;
1174 t->session_index = ~0;
1177 pkts_processed += next0 == vnet_buffer2 (b0)->nat.arc_next;
1178 /* verify speculative enqueue, maybe switch current next frame */
1179 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1180 to_next, n_left_to_next,
1184 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1187 vlib_node_increment_counter (vm, stats_node_index,
1188 NAT_IN2OUT_ED_ERROR_IN2OUT_PACKETS,
1190 vlib_node_increment_counter (vm, stats_node_index,
1191 NAT_IN2OUT_ED_ERROR_TCP_PACKETS, tcp_packets);
1192 vlib_node_increment_counter (vm, stats_node_index,
1193 NAT_IN2OUT_ED_ERROR_UDP_PACKETS, udp_packets);
1194 vlib_node_increment_counter (vm, stats_node_index,
1195 NAT_IN2OUT_ED_ERROR_ICMP_PACKETS,
1197 vlib_node_increment_counter (vm, stats_node_index,
1198 NAT_IN2OUT_ED_ERROR_OTHER_PACKETS,
1200 return frame->n_vectors;
1204 nat44_ed_in2out_slow_path_node_fn_inline (vlib_main_t * vm,
1205 vlib_node_runtime_t * node,
1206 vlib_frame_t * frame,
1207 int is_output_feature)
1209 u32 n_left_from, *from, *to_next, pkts_processed = 0, stats_node_index;
1210 nat_next_t next_index;
1211 snat_main_t *sm = &snat_main;
1212 f64 now = vlib_time_now (vm);
1213 u32 thread_index = vm->thread_index;
1214 snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
1215 u32 tcp_packets = 0, udp_packets = 0, icmp_packets = 0, other_packets = 0;
1217 stats_node_index = sm->ed_in2out_slowpath_node_index;
1219 from = vlib_frame_vector_args (frame);
1220 n_left_from = frame->n_vectors;
1221 next_index = node->cached_next_index;
1223 while (n_left_from > 0)
1227 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1229 while (n_left_from > 0 && n_left_to_next > 0)
1233 u32 next0, sw_if_index0, rx_fib_index0, iph_offset0 = 0, proto0,
1234 new_addr0, old_addr0;
1235 u16 old_port0, new_port0;
1239 icmp46_header_t *icmp0;
1240 snat_session_t *s0 = 0;
1241 clib_bihash_kv_16_8_t kv0, value0;
1244 /* speculatively enqueue b0 to the current next frame */
1250 n_left_to_next -= 1;
1252 b0 = vlib_get_buffer (vm, bi0);
1254 if (is_output_feature)
1255 iph_offset0 = vnet_buffer (b0)->ip.reass.save_rewrite_length;
1257 next0 = vnet_buffer2 (b0)->nat.arc_next;
1259 ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) +
1262 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
1264 fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
1267 if (PREDICT_FALSE (ip0->ttl == 1))
1269 vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
1270 icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
1271 ICMP4_time_exceeded_ttl_exceeded_in_transit,
1273 next0 = NAT_NEXT_ICMP_ERROR;
1277 udp0 = ip4_next_header (ip0);
1278 tcp0 = (tcp_header_t *) udp0;
1279 icmp0 = (icmp46_header_t *) udp0;
1280 proto0 = ip_proto_to_snat_proto (ip0->protocol);
1282 if (PREDICT_FALSE (proto0 == ~0))
1284 s0 = nat44_ed_in2out_unknown_proto (sm, b0, ip0,
1289 next0 = NAT_NEXT_DROP;
1295 if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
1297 next0 = icmp_in2out_ed_slow_path
1298 (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0,
1299 node, next0, now, thread_index, &s0);
1305 make_ed_kv (&kv0, &ip0->src_address, &ip0->dst_address,
1306 ip0->protocol, rx_fib_index0,
1307 vnet_buffer (b0)->ip.reass.l4_src_port,
1308 vnet_buffer (b0)->ip.reass.l4_dst_port);
1310 if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &kv0, &value0))
1312 s0 = pool_elt_at_index (tsm->sessions, value0.value);
1314 if (s0->tcp_close_timestamp && now >= s0->tcp_close_timestamp)
1316 nat_free_session_data (sm, s0, thread_index, 0);
1317 nat44_ed_delete_session (sm, s0, thread_index, 1);
1324 if (is_output_feature)
1327 (nat44_ed_not_translate_output_feature
1328 (sm, ip0, ip0->protocol,
1329 vnet_buffer (b0)->ip.reass.l4_src_port,
1330 vnet_buffer (b0)->ip.reass.l4_dst_port,
1331 thread_index, sw_if_index0,
1332 vnet_buffer (b0)->sw_if_index[VLIB_TX])))
1336 * Send DHCP packets to the ipv4 stack, or we won't
1337 * be able to use dhcp client on the outside interface
1340 (proto0 == SNAT_PROTOCOL_UDP
1341 && (vnet_buffer (b0)->ip.reass.l4_dst_port ==
1342 clib_host_to_net_u16 (UDP_DST_PORT_dhcp_to_server))
1343 && ip0->dst_address.as_u32 == 0xffffffff))
1349 (nat44_ed_not_translate
1350 (sm, node, sw_if_index0, ip0, proto0, rx_fib_index0,
1355 next0 = slow_path_ed (sm, b0, rx_fib_index0, &kv0, &s0, node,
1356 next0, thread_index, now);
1358 if (PREDICT_FALSE (next0 == NAT_NEXT_DROP))
1361 if (PREDICT_FALSE (!s0))
1366 b0->flags |= VNET_BUFFER_F_IS_NATED;
1368 if (!is_output_feature)
1369 vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index;
1371 old_addr0 = ip0->src_address.as_u32;
1372 new_addr0 = ip0->src_address.as_u32 = s0->out2in.addr.as_u32;
1373 sum0 = ip0->checksum;
1374 sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
1376 if (PREDICT_FALSE (is_twice_nat_session (s0)))
1377 sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32,
1378 s0->ext_host_addr.as_u32, ip4_header_t,
1380 ip0->checksum = ip_csum_fold (sum0);
1382 old_port0 = vnet_buffer (b0)->ip.reass.l4_src_port;
1384 if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
1386 if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
1388 new_port0 = udp0->src_port = s0->out2in.port;
1389 sum0 = tcp0->checksum;
1391 ip_csum_update (sum0, old_addr0, new_addr0,
1392 ip4_header_t, dst_address);
1394 ip_csum_update (sum0, old_port0, new_port0,
1395 ip4_header_t, length);
1396 if (PREDICT_FALSE (is_twice_nat_session (s0)))
1399 ip_csum_update (sum0, ip0->dst_address.as_u32,
1400 s0->ext_host_addr.as_u32,
1401 ip4_header_t, dst_address);
1403 ip_csum_update (sum0,
1404 vnet_buffer (b0)->ip.
1405 reass.l4_dst_port, s0->ext_host_port,
1406 ip4_header_t, length);
1407 tcp0->dst_port = s0->ext_host_port;
1408 ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
1410 mss_clamping (sm, tcp0, &sum0);
1411 tcp0->checksum = ip_csum_fold (sum0);
1414 if (nat44_set_tcp_session_state_i2o
1415 (sm, now, s0, b0, thread_index))
1418 else if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment
1421 new_port0 = udp0->src_port = s0->out2in.port;
1422 sum0 = udp0->checksum;
1424 ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
1427 ip_csum_update (sum0, old_port0, new_port0, ip4_header_t,
1429 if (PREDICT_FALSE (is_twice_nat_session (s0)))
1431 sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32,
1432 s0->ext_host_addr.as_u32,
1433 ip4_header_t, dst_address);
1435 ip_csum_update (sum0,
1436 vnet_buffer (b0)->ip.reass.l4_dst_port,
1437 s0->ext_host_port, ip4_header_t, length);
1438 udp0->dst_port = s0->ext_host_port;
1439 ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
1441 udp0->checksum = ip_csum_fold (sum0);
1446 if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
1448 new_port0 = udp0->src_port = s0->out2in.port;
1449 if (PREDICT_FALSE (is_twice_nat_session (s0)))
1451 udp0->dst_port = s0->ext_host_port;
1452 ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
1459 nat44_session_update_counters (s0, now,
1460 vlib_buffer_length_in_chain
1461 (vm, b0), thread_index);
1462 /* Per-user LRU list maintenance */
1463 nat44_session_update_lru (sm, s0, thread_index);
1466 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
1467 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
1469 nat_in2out_ed_trace_t *t =
1470 vlib_add_trace (vm, node, b0, sizeof (*t));
1471 t->sw_if_index = sw_if_index0;
1472 t->next_index = next0;
1473 t->is_slow_path = 1;
1476 t->session_index = s0 - tsm->sessions;
1478 t->session_index = ~0;
1481 pkts_processed += next0 == vnet_buffer2 (b0)->nat.arc_next;
1483 /* verify speculative enqueue, maybe switch current next frame */
1484 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
1485 to_next, n_left_to_next,
1489 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1492 vlib_node_increment_counter (vm, stats_node_index,
1493 NAT_IN2OUT_ED_ERROR_IN2OUT_PACKETS,
1495 vlib_node_increment_counter (vm, stats_node_index,
1496 NAT_IN2OUT_ED_ERROR_TCP_PACKETS, tcp_packets);
1497 vlib_node_increment_counter (vm, stats_node_index,
1498 NAT_IN2OUT_ED_ERROR_UDP_PACKETS, udp_packets);
1499 vlib_node_increment_counter (vm, stats_node_index,
1500 NAT_IN2OUT_ED_ERROR_ICMP_PACKETS,
1502 vlib_node_increment_counter (vm, stats_node_index,
1503 NAT_IN2OUT_ED_ERROR_OTHER_PACKETS,
1505 return frame->n_vectors;
1508 VLIB_NODE_FN (nat44_ed_in2out_node) (vlib_main_t * vm,
1509 vlib_node_runtime_t * node,
1510 vlib_frame_t * frame)
1512 return nat44_ed_in2out_fast_path_node_fn_inline (vm, node, frame, 0);
1516 VLIB_REGISTER_NODE (nat44_ed_in2out_node) = {
1517 .name = "nat44-ed-in2out",
1518 .vector_size = sizeof (u32),
1519 .sibling_of = "nat-default",
1520 .format_trace = format_nat_in2out_ed_trace,
1521 .type = VLIB_NODE_TYPE_INTERNAL,
1522 .n_errors = ARRAY_LEN (nat_in2out_ed_error_strings),
1523 .error_strings = nat_in2out_ed_error_strings,
1524 .runtime_data_bytes = sizeof (snat_runtime_t),
1528 VLIB_NODE_FN (nat44_ed_in2out_output_node) (vlib_main_t * vm,
1529 vlib_node_runtime_t * node,
1530 vlib_frame_t * frame)
1532 return nat44_ed_in2out_fast_path_node_fn_inline (vm, node, frame, 1);
1536 VLIB_REGISTER_NODE (nat44_ed_in2out_output_node) = {
1537 .name = "nat44-ed-in2out-output",
1538 .vector_size = sizeof (u32),
1539 .sibling_of = "nat-default",
1540 .format_trace = format_nat_in2out_ed_trace,
1541 .type = VLIB_NODE_TYPE_INTERNAL,
1542 .n_errors = ARRAY_LEN (nat_in2out_ed_error_strings),
1543 .error_strings = nat_in2out_ed_error_strings,
1544 .runtime_data_bytes = sizeof (snat_runtime_t),
1548 VLIB_NODE_FN (nat44_ed_in2out_slowpath_node) (vlib_main_t * vm,
1549 vlib_node_runtime_t *
1550 node, vlib_frame_t * frame)
1552 return nat44_ed_in2out_slow_path_node_fn_inline (vm, node, frame, 0);
1556 VLIB_REGISTER_NODE (nat44_ed_in2out_slowpath_node) = {
1557 .name = "nat44-ed-in2out-slowpath",
1558 .vector_size = sizeof (u32),
1559 .sibling_of = "nat-default",
1560 .format_trace = format_nat_in2out_ed_trace,
1561 .type = VLIB_NODE_TYPE_INTERNAL,
1562 .n_errors = ARRAY_LEN (nat_in2out_ed_error_strings),
1563 .error_strings = nat_in2out_ed_error_strings,
1564 .runtime_data_bytes = sizeof (snat_runtime_t),
1568 VLIB_NODE_FN (nat44_ed_in2out_output_slowpath_node) (vlib_main_t * vm,
1571 vlib_frame_t * frame)
1573 return nat44_ed_in2out_slow_path_node_fn_inline (vm, node, frame, 1);
1577 VLIB_REGISTER_NODE (nat44_ed_in2out_output_slowpath_node) = {
1578 .name = "nat44-ed-in2out-output-slowpath",
1579 .vector_size = sizeof (u32),
1580 .sibling_of = "nat-default",
1581 .format_trace = format_nat_in2out_ed_trace,
1582 .type = VLIB_NODE_TYPE_INTERNAL,
1583 .n_errors = ARRAY_LEN (nat_in2out_ed_error_strings),
1584 .error_strings = nat_in2out_ed_error_strings,
1585 .runtime_data_bytes = sizeof (snat_runtime_t),
1590 format_nat_pre_trace (u8 * s, va_list * args)
1592 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
1593 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
1594 nat_pre_trace_t *t = va_arg (*args, nat_pre_trace_t *);
1595 return format (s, "in2out next_index %d", t->next_index);
1598 VLIB_NODE_FN (nat_pre_in2out_node)
1599 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
1601 return nat_pre_node_fn_inline (vm, node, frame,
1602 NAT_NEXT_IN2OUT_ED_FAST_PATH);
1606 VLIB_REGISTER_NODE (nat_pre_in2out_node) = {
1607 .name = "nat-pre-in2out",
1608 .vector_size = sizeof (u32),
1609 .sibling_of = "nat-default",
1610 .format_trace = format_nat_pre_trace,
1611 .type = VLIB_NODE_TYPE_INTERNAL,
1617 * fd.io coding-style-patch-verification: ON
1620 * eval: (c-set-style "gnu")