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 Deterministic/CGN NAT44 outside to inside network translation
20 #include <vlib/vlib.h>
21 #include <vnet/vnet.h>
22 #include <vnet/ip/ip.h>
23 #include <vnet/fib/ip4_fib.h>
24 #include <vppinfra/error.h>
25 #include <vppinfra/elog.h>
27 #include <nat/nat_det.h>
28 #include <nat/nat_inlines.h>
32 NAT_DET_OUT2IN_NEXT_DROP,
33 NAT_DET_OUT2IN_NEXT_LOOKUP,
34 NAT_DET_OUT2IN_NEXT_ICMP_ERROR,
35 NAT_DET_OUT2IN_N_NEXT,
36 } nat_det_out2in_next_t;
43 } nat_det_out2in_trace_t;
45 #define foreach_nat_det_out2in_error \
46 _(UNSUPPORTED_PROTOCOL, "Unsupported protocol") \
47 _(NO_TRANSLATION, "No translation") \
48 _(BAD_ICMP_TYPE, "unsupported ICMP type") \
49 _(OUT2IN_PACKETS, "Good out2in packets processed")
53 #define _(sym,str) NAT_DET_OUT2IN_ERROR_##sym,
54 foreach_nat_det_out2in_error
57 } nat_det_out2in_error_t;
59 static char *nat_det_out2in_error_strings[] = {
60 #define _(sym,string) string,
61 foreach_nat_det_out2in_error
65 vlib_node_registration_t snat_det_out2in_node;
68 format_nat_det_out2in_trace (u8 * s, va_list * args)
70 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
71 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
72 nat_det_out2in_trace_t *t = va_arg (*args, nat_det_out2in_trace_t *);
76 "NAT_DET_OUT2IN: sw_if_index %d, next index %d, session index %d",
77 t->sw_if_index, t->next_index, t->session_index);
82 * Get address and port values to be used for ICMP packet translation
83 * and create session if needed
85 * @param[in,out] sm NAT main
86 * @param[in,out] node NAT node runtime
87 * @param[in] thread_index thread index
88 * @param[in,out] b0 buffer containing packet to be translated
89 * @param[out] p_proto protocol used for matching
90 * @param[out] p_value address and port after NAT translation
91 * @param[out] p_dont_translate if packet should not be translated
92 * @param d optional parameter
93 * @param e optional parameter
96 icmp_match_out2in_det (snat_main_t * sm, vlib_node_runtime_t * node,
97 u32 thread_index, vlib_buffer_t * b0,
98 ip4_header_t * ip0, u8 * p_proto,
99 snat_session_key_t * p_value,
100 u8 * p_dont_translate, void *d, void *e)
102 icmp46_header_t *icmp0;
105 snat_det_out_key_t key0;
106 u8 dont_translate = 0;
108 icmp_echo_header_t *echo0, *inner_echo0 = 0;
109 ip4_header_t *inner_ip0;
111 icmp46_header_t *inner_icmp0;
112 snat_det_map_t *dm0 = 0;
113 ip4_address_t new_addr0 = { {0} };
114 snat_det_session_t *ses0 = 0;
115 ip4_address_t out_addr;
117 icmp0 = (icmp46_header_t *) ip4_next_header (ip0);
118 echo0 = (icmp_echo_header_t *) (icmp0 + 1);
119 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
121 if (!icmp_is_error_message (icmp0))
123 protocol = SNAT_PROTOCOL_ICMP;
124 key0.ext_host_addr = ip0->src_address;
125 key0.ext_host_port = 0;
126 key0.out_port = echo0->identifier;
127 out_addr = ip0->dst_address;
131 inner_ip0 = (ip4_header_t *) (echo0 + 1);
132 l4_header = ip4_next_header (inner_ip0);
133 protocol = ip_proto_to_snat_proto (inner_ip0->protocol);
134 key0.ext_host_addr = inner_ip0->dst_address;
135 out_addr = inner_ip0->src_address;
138 case SNAT_PROTOCOL_ICMP:
139 inner_icmp0 = (icmp46_header_t *) l4_header;
140 inner_echo0 = (icmp_echo_header_t *) (inner_icmp0 + 1);
141 key0.ext_host_port = 0;
142 key0.out_port = inner_echo0->identifier;
144 case SNAT_PROTOCOL_UDP:
145 case SNAT_PROTOCOL_TCP:
146 key0.ext_host_port = ((tcp_udp_header_t *) l4_header)->dst_port;
147 key0.out_port = ((tcp_udp_header_t *) l4_header)->src_port;
150 b0->error = node->errors[NAT_DET_OUT2IN_ERROR_UNSUPPORTED_PROTOCOL];
151 next0 = NAT_DET_OUT2IN_NEXT_DROP;
156 dm0 = snat_det_map_by_out (sm, &out_addr);
157 if (PREDICT_FALSE (!dm0))
159 /* Don't NAT packet aimed at the intfc address */
160 if (PREDICT_FALSE (is_interface_addr (sm, node, sw_if_index0,
161 ip0->dst_address.as_u32)))
166 nat_log_info ("unknown dst address: %U",
167 format_ip4_address, &ip0->dst_address);
171 snat_det_reverse (dm0, &ip0->dst_address,
172 clib_net_to_host_u16 (key0.out_port), &new_addr0);
174 ses0 = snat_det_get_ses_by_out (dm0, &new_addr0, key0.as_u64);
175 if (PREDICT_FALSE (!ses0))
177 /* Don't NAT packet aimed at the intfc address */
178 if (PREDICT_FALSE (is_interface_addr (sm, node, sw_if_index0,
179 ip0->dst_address.as_u32)))
184 nat_log_info ("no match src %U:%d dst %U:%d for user %U",
185 format_ip4_address, &key0.ext_host_addr,
186 clib_net_to_host_u16 (key0.ext_host_port),
187 format_ip4_address, &out_addr,
188 clib_net_to_host_u16 (key0.out_port),
189 format_ip4_address, &new_addr0);
190 b0->error = node->errors[NAT_DET_OUT2IN_ERROR_NO_TRANSLATION];
191 next0 = NAT_DET_OUT2IN_NEXT_DROP;
195 if (PREDICT_FALSE (icmp0->type != ICMP4_echo_reply &&
196 !icmp_is_error_message (icmp0)))
198 b0->error = node->errors[NAT_DET_OUT2IN_ERROR_BAD_ICMP_TYPE];
199 next0 = NAT_DET_OUT2IN_NEXT_DROP;
209 p_value->addr = new_addr0;
210 p_value->fib_index = sm->inside_fib_index;
211 p_value->port = ses0->in_port;
213 *p_dont_translate = dont_translate;
215 *(snat_det_session_t **) d = ses0;
217 *(snat_det_map_t **) e = dm0;
222 snat_det_out2in_node_fn (vlib_main_t * vm,
223 vlib_node_runtime_t * node, vlib_frame_t * frame)
225 u32 n_left_from, *from, *to_next;
226 nat_det_out2in_next_t next_index;
227 u32 pkts_processed = 0;
228 snat_main_t *sm = &snat_main;
229 u32 thread_index = vm->thread_index;
231 from = vlib_frame_vector_args (frame);
232 n_left_from = frame->n_vectors;
233 next_index = node->cached_next_index;
235 while (n_left_from > 0)
239 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
241 while (n_left_from >= 4 && n_left_to_next >= 2)
244 vlib_buffer_t *b0, *b1;
245 u32 next0 = NAT_DET_OUT2IN_NEXT_LOOKUP;
246 u32 next1 = NAT_DET_OUT2IN_NEXT_LOOKUP;
247 u32 sw_if_index0, sw_if_index1;
248 ip4_header_t *ip0, *ip1;
249 ip_csum_t sum0, sum1;
250 ip4_address_t new_addr0, old_addr0, new_addr1, old_addr1;
251 u16 new_port0, old_port0, old_port1, new_port1;
252 udp_header_t *udp0, *udp1;
253 tcp_header_t *tcp0, *tcp1;
255 snat_det_out_key_t key0, key1;
256 snat_det_map_t *dm0, *dm1;
257 snat_det_session_t *ses0 = 0, *ses1 = 0;
258 u32 rx_fib_index0, rx_fib_index1;
259 icmp46_header_t *icmp0, *icmp1;
261 /* Prefetch next iteration. */
263 vlib_buffer_t *p2, *p3;
265 p2 = vlib_get_buffer (vm, from[2]);
266 p3 = vlib_get_buffer (vm, from[3]);
268 vlib_prefetch_buffer_header (p2, LOAD);
269 vlib_prefetch_buffer_header (p3, LOAD);
271 CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, STORE);
272 CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, STORE);
275 /* speculatively enqueue b0 and b1 to the current next frame */
276 to_next[0] = bi0 = from[0];
277 to_next[1] = bi1 = from[1];
283 b0 = vlib_get_buffer (vm, bi0);
284 b1 = vlib_get_buffer (vm, bi1);
286 ip0 = vlib_buffer_get_current (b0);
287 udp0 = ip4_next_header (ip0);
288 tcp0 = (tcp_header_t *) udp0;
290 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
292 if (PREDICT_FALSE (ip0->ttl == 1))
294 vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
295 icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
296 ICMP4_time_exceeded_ttl_exceeded_in_transit,
298 next0 = NAT_DET_OUT2IN_NEXT_ICMP_ERROR;
302 proto0 = ip_proto_to_snat_proto (ip0->protocol);
304 if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
307 ip4_fib_table_get_index_for_sw_if_index (sw_if_index0);
308 icmp0 = (icmp46_header_t *) udp0;
310 next0 = icmp_out2in (sm, b0, ip0, icmp0, sw_if_index0,
311 rx_fib_index0, node, next0, thread_index,
316 key0.ext_host_addr = ip0->src_address;
317 key0.ext_host_port = tcp0->src;
318 key0.out_port = tcp0->dst;
320 dm0 = snat_det_map_by_out (sm, &ip0->dst_address);
321 if (PREDICT_FALSE (!dm0))
323 nat_log_info ("unknown dst address: %U",
324 format_ip4_address, &ip0->dst_address);
325 next0 = NAT_DET_OUT2IN_NEXT_DROP;
326 b0->error = node->errors[NAT_DET_OUT2IN_ERROR_NO_TRANSLATION];
330 snat_det_reverse (dm0, &ip0->dst_address,
331 clib_net_to_host_u16 (tcp0->dst), &new_addr0);
333 ses0 = snat_det_get_ses_by_out (dm0, &new_addr0, key0.as_u64);
334 if (PREDICT_FALSE (!ses0))
336 nat_log_info ("no match src %U:%d dst %U:%d for user %U",
337 format_ip4_address, &ip0->src_address,
338 clib_net_to_host_u16 (tcp0->src),
339 format_ip4_address, &ip0->dst_address,
340 clib_net_to_host_u16 (tcp0->dst),
341 format_ip4_address, &new_addr0);
342 next0 = NAT_DET_OUT2IN_NEXT_DROP;
343 b0->error = node->errors[NAT_DET_OUT2IN_ERROR_NO_TRANSLATION];
346 new_port0 = ses0->in_port;
348 old_addr0 = ip0->dst_address;
349 ip0->dst_address = new_addr0;
350 vnet_buffer (b0)->sw_if_index[VLIB_TX] = sm->inside_fib_index;
352 sum0 = ip0->checksum;
353 sum0 = ip_csum_update (sum0, old_addr0.as_u32, new_addr0.as_u32,
355 dst_address /* changed member */ );
356 ip0->checksum = ip_csum_fold (sum0);
358 if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
360 if (tcp0->flags & TCP_FLAG_FIN
361 && ses0->state == SNAT_SESSION_TCP_ESTABLISHED)
362 ses0->state = SNAT_SESSION_TCP_CLOSE_WAIT;
363 else if (tcp0->flags & TCP_FLAG_ACK
364 && ses0->state == SNAT_SESSION_TCP_LAST_ACK)
365 snat_det_ses_close (dm0, ses0);
367 old_port0 = tcp0->dst;
368 tcp0->dst = new_port0;
370 sum0 = tcp0->checksum;
371 sum0 = ip_csum_update (sum0, old_addr0.as_u32, new_addr0.as_u32,
373 dst_address /* changed member */ );
375 sum0 = ip_csum_update (sum0, old_port0, new_port0,
376 ip4_header_t /* cheat */ ,
377 length /* changed member */ );
378 tcp0->checksum = ip_csum_fold (sum0);
382 old_port0 = udp0->dst_port;
383 udp0->dst_port = new_port0;
389 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
390 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
392 nat_det_out2in_trace_t *t =
393 vlib_add_trace (vm, node, b0, sizeof (*t));
394 t->sw_if_index = sw_if_index0;
395 t->next_index = next0;
396 t->session_index = ~0;
398 t->session_index = ses0 - dm0->sessions;
401 pkts_processed += next0 != NAT_DET_OUT2IN_NEXT_DROP;
403 b1 = vlib_get_buffer (vm, bi1);
405 ip1 = vlib_buffer_get_current (b1);
406 udp1 = ip4_next_header (ip1);
407 tcp1 = (tcp_header_t *) udp1;
409 sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX];
411 if (PREDICT_FALSE (ip1->ttl == 1))
413 vnet_buffer (b1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
414 icmp4_error_set_vnet_buffer (b1, ICMP4_time_exceeded,
415 ICMP4_time_exceeded_ttl_exceeded_in_transit,
417 next1 = NAT_DET_OUT2IN_NEXT_ICMP_ERROR;
421 proto1 = ip_proto_to_snat_proto (ip1->protocol);
423 if (PREDICT_FALSE (proto1 == SNAT_PROTOCOL_ICMP))
426 ip4_fib_table_get_index_for_sw_if_index (sw_if_index1);
427 icmp1 = (icmp46_header_t *) udp1;
429 next1 = icmp_out2in (sm, b1, ip1, icmp1, sw_if_index1,
430 rx_fib_index1, node, next1, thread_index,
435 key1.ext_host_addr = ip1->src_address;
436 key1.ext_host_port = tcp1->src;
437 key1.out_port = tcp1->dst;
439 dm1 = snat_det_map_by_out (sm, &ip1->dst_address);
440 if (PREDICT_FALSE (!dm1))
442 nat_log_info ("unknown dst address: %U",
443 format_ip4_address, &ip1->dst_address);
444 next1 = NAT_DET_OUT2IN_NEXT_DROP;
445 b1->error = node->errors[NAT_DET_OUT2IN_ERROR_NO_TRANSLATION];
449 snat_det_reverse (dm1, &ip1->dst_address,
450 clib_net_to_host_u16 (tcp1->dst), &new_addr1);
452 ses1 = snat_det_get_ses_by_out (dm1, &new_addr1, key1.as_u64);
453 if (PREDICT_FALSE (!ses1))
455 nat_log_info ("no match src %U:%d dst %U:%d for user %U",
456 format_ip4_address, &ip1->src_address,
457 clib_net_to_host_u16 (tcp1->src),
458 format_ip4_address, &ip1->dst_address,
459 clib_net_to_host_u16 (tcp1->dst),
460 format_ip4_address, &new_addr1);
461 next1 = NAT_DET_OUT2IN_NEXT_DROP;
462 b1->error = node->errors[NAT_DET_OUT2IN_ERROR_NO_TRANSLATION];
465 new_port1 = ses1->in_port;
467 old_addr1 = ip1->dst_address;
468 ip1->dst_address = new_addr1;
469 vnet_buffer (b1)->sw_if_index[VLIB_TX] = sm->inside_fib_index;
471 sum1 = ip1->checksum;
472 sum1 = ip_csum_update (sum1, old_addr1.as_u32, new_addr1.as_u32,
474 dst_address /* changed member */ );
475 ip1->checksum = ip_csum_fold (sum1);
477 if (PREDICT_TRUE (proto1 == SNAT_PROTOCOL_TCP))
479 if (tcp1->flags & TCP_FLAG_FIN
480 && ses1->state == SNAT_SESSION_TCP_ESTABLISHED)
481 ses1->state = SNAT_SESSION_TCP_CLOSE_WAIT;
482 else if (tcp1->flags & TCP_FLAG_ACK
483 && ses1->state == SNAT_SESSION_TCP_LAST_ACK)
484 snat_det_ses_close (dm1, ses1);
486 old_port1 = tcp1->dst;
487 tcp1->dst = new_port1;
489 sum1 = tcp1->checksum;
490 sum1 = ip_csum_update (sum1, old_addr1.as_u32, new_addr1.as_u32,
492 dst_address /* changed member */ );
494 sum1 = ip_csum_update (sum1, old_port1, new_port1,
495 ip4_header_t /* cheat */ ,
496 length /* changed member */ );
497 tcp1->checksum = ip_csum_fold (sum1);
501 old_port1 = udp1->dst_port;
502 udp1->dst_port = new_port1;
508 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
509 && (b1->flags & VLIB_BUFFER_IS_TRACED)))
511 nat_det_out2in_trace_t *t =
512 vlib_add_trace (vm, node, b1, sizeof (*t));
513 t->sw_if_index = sw_if_index1;
514 t->next_index = next1;
515 t->session_index = ~0;
517 t->session_index = ses1 - dm1->sessions;
520 pkts_processed += next1 != NAT_DET_OUT2IN_NEXT_DROP;
522 /* verify speculative enqueues, maybe switch current next frame */
523 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
524 to_next, n_left_to_next,
525 bi0, bi1, next0, next1);
528 while (n_left_from > 0 && n_left_to_next > 0)
532 u32 next0 = NAT_DET_OUT2IN_NEXT_LOOKUP;
536 ip4_address_t new_addr0, old_addr0;
537 u16 new_port0, old_port0;
541 snat_det_out_key_t key0;
543 snat_det_session_t *ses0 = 0;
545 icmp46_header_t *icmp0;
547 /* speculatively enqueue b0 to the current next frame */
555 b0 = vlib_get_buffer (vm, bi0);
557 ip0 = vlib_buffer_get_current (b0);
558 udp0 = ip4_next_header (ip0);
559 tcp0 = (tcp_header_t *) udp0;
561 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
563 if (PREDICT_FALSE (ip0->ttl == 1))
565 vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
566 icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
567 ICMP4_time_exceeded_ttl_exceeded_in_transit,
569 next0 = NAT_DET_OUT2IN_NEXT_ICMP_ERROR;
573 proto0 = ip_proto_to_snat_proto (ip0->protocol);
575 if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
578 ip4_fib_table_get_index_for_sw_if_index (sw_if_index0);
579 icmp0 = (icmp46_header_t *) udp0;
581 next0 = icmp_out2in (sm, b0, ip0, icmp0, sw_if_index0,
582 rx_fib_index0, node, next0, thread_index,
587 key0.ext_host_addr = ip0->src_address;
588 key0.ext_host_port = tcp0->src;
589 key0.out_port = tcp0->dst;
591 dm0 = snat_det_map_by_out (sm, &ip0->dst_address);
592 if (PREDICT_FALSE (!dm0))
594 nat_log_info ("unknown dst address: %U",
595 format_ip4_address, &ip0->dst_address);
596 next0 = NAT_DET_OUT2IN_NEXT_DROP;
597 b0->error = node->errors[NAT_DET_OUT2IN_ERROR_NO_TRANSLATION];
601 snat_det_reverse (dm0, &ip0->dst_address,
602 clib_net_to_host_u16 (tcp0->dst), &new_addr0);
604 ses0 = snat_det_get_ses_by_out (dm0, &new_addr0, key0.as_u64);
605 if (PREDICT_FALSE (!ses0))
607 nat_log_info ("no match src %U:%d dst %U:%d for user %U",
608 format_ip4_address, &ip0->src_address,
609 clib_net_to_host_u16 (tcp0->src),
610 format_ip4_address, &ip0->dst_address,
611 clib_net_to_host_u16 (tcp0->dst),
612 format_ip4_address, &new_addr0);
613 next0 = NAT_DET_OUT2IN_NEXT_DROP;
614 b0->error = node->errors[NAT_DET_OUT2IN_ERROR_NO_TRANSLATION];
617 new_port0 = ses0->in_port;
619 old_addr0 = ip0->dst_address;
620 ip0->dst_address = new_addr0;
621 vnet_buffer (b0)->sw_if_index[VLIB_TX] = sm->inside_fib_index;
623 sum0 = ip0->checksum;
624 sum0 = ip_csum_update (sum0, old_addr0.as_u32, new_addr0.as_u32,
626 dst_address /* changed member */ );
627 ip0->checksum = ip_csum_fold (sum0);
629 if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
631 if (tcp0->flags & TCP_FLAG_FIN
632 && ses0->state == SNAT_SESSION_TCP_ESTABLISHED)
633 ses0->state = SNAT_SESSION_TCP_CLOSE_WAIT;
634 else if (tcp0->flags & TCP_FLAG_ACK
635 && ses0->state == SNAT_SESSION_TCP_LAST_ACK)
636 snat_det_ses_close (dm0, ses0);
638 old_port0 = tcp0->dst;
639 tcp0->dst = new_port0;
641 sum0 = tcp0->checksum;
642 sum0 = ip_csum_update (sum0, old_addr0.as_u32, new_addr0.as_u32,
644 dst_address /* changed member */ );
646 sum0 = ip_csum_update (sum0, old_port0, new_port0,
647 ip4_header_t /* cheat */ ,
648 length /* changed member */ );
649 tcp0->checksum = ip_csum_fold (sum0);
653 old_port0 = udp0->dst_port;
654 udp0->dst_port = new_port0;
660 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
661 && (b0->flags & VLIB_BUFFER_IS_TRACED)))
663 nat_det_out2in_trace_t *t =
664 vlib_add_trace (vm, node, b0, sizeof (*t));
665 t->sw_if_index = sw_if_index0;
666 t->next_index = next0;
667 t->session_index = ~0;
669 t->session_index = ses0 - dm0->sessions;
672 pkts_processed += next0 != NAT_DET_OUT2IN_NEXT_DROP;
674 /* verify speculative enqueue, maybe switch current next frame */
675 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
676 to_next, n_left_to_next,
680 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
683 vlib_node_increment_counter (vm, snat_det_out2in_node.index,
684 NAT_DET_OUT2IN_ERROR_OUT2IN_PACKETS,
686 return frame->n_vectors;
690 VLIB_REGISTER_NODE (snat_det_out2in_node) = {
691 .function = snat_det_out2in_node_fn,
692 .name = "nat44-det-out2in",
693 .vector_size = sizeof (u32),
694 .format_trace = format_nat_det_out2in_trace,
695 .type = VLIB_NODE_TYPE_INTERNAL,
696 .n_errors = ARRAY_LEN(nat_det_out2in_error_strings),
697 .error_strings = nat_det_out2in_error_strings,
698 .runtime_data_bytes = sizeof (snat_runtime_t),
699 .n_next_nodes = NAT_DET_OUT2IN_N_NEXT,
700 /* edit / add dispositions here */
702 [NAT_DET_OUT2IN_NEXT_DROP] = "error-drop",
703 [NAT_DET_OUT2IN_NEXT_LOOKUP] = "ip4-lookup",
704 [NAT_DET_OUT2IN_NEXT_ICMP_ERROR] = "ip4-icmp-error",
709 VLIB_NODE_FUNCTION_MULTIARCH (snat_det_out2in_node, snat_det_out2in_node_fn);
712 * fd.io coding-style-patch-verification: ON
715 * eval: (c-set-style "gnu")