2 * decap.c : IPSec tunnel decapsulation
4 * Copyright (c) 2015 Cisco and/or its affiliates.
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at:
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
18 #include <vnet/vnet.h>
19 #include <vnet/api_errno.h>
20 #include <vnet/ip/ip.h>
21 #include <vnet/feature/feature.h>
23 #include <vnet/ipsec/ipsec.h>
24 #include <vnet/ipsec/esp.h>
25 #include <vnet/ipsec/ah.h>
26 #include <vnet/ipsec/ipsec_io.h>
28 #define foreach_ipsec_input_error \
29 _(RX_PKTS, "IPSec pkts received") \
30 _(RX_POLICY_MATCH, "IPSec policy match") \
31 _(RX_POLICY_NO_MATCH, "IPSec policy not matched") \
32 _(RX_POLICY_BYPASS, "IPSec policy bypass") \
33 _(RX_POLICY_DISCARD, "IPSec policy discard")
37 #define _(sym,str) IPSEC_INPUT_ERROR_##sym,
38 foreach_ipsec_input_error
41 } ipsec_input_error_t;
43 static char *ipsec_input_error_strings[] = {
44 #define _(sym,string) string,
45 foreach_ipsec_input_error
57 } ipsec_input_trace_t;
59 /* packet trace format function */
61 format_ipsec_input_trace (u8 * s, va_list * args)
63 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
64 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
65 ipsec_input_trace_t *t = va_arg (*args, ipsec_input_trace_t *);
67 s = format (s, "%U: sa_id %u spd %u policy %d spi %u (0x%08x) seq %u",
68 format_ip_protocol, t->proto, t->sa_id,
69 t->spd, t->policy_index, t->spi, t->spi, t->seq);
75 ipsec4_input_spd_add_flow_cache_entry (ipsec_main_t *im, u32 sa, u32 da,
76 ipsec_spd_policy_type_t policy_type,
80 u8 is_overwrite = 0, is_stale_overwrite = 0;
81 /* Store in network byte order to avoid conversion on lookup */
82 ipsec4_inbound_spd_tuple_t ip4_tuple = {
83 .ip4_src_addr = (ip4_address_t) clib_host_to_net_u32 (sa),
84 .ip4_dest_addr = (ip4_address_t) clib_host_to_net_u32 (da),
85 .policy_type = policy_type
88 ip4_tuple.kv_16_8.value =
89 (((u64) pol_id) << 32) | ((u64) im->input_epoch_count);
91 hash = ipsec4_hash_16_8 (&ip4_tuple.kv_16_8);
92 hash &= (im->ipsec4_in_spd_hash_num_buckets - 1);
94 ipsec_spinlock_lock (&im->ipsec4_in_spd_hash_tbl[hash].bucket_lock);
95 /* Check if we are overwriting an existing entry so we know
96 whether to increment the flow cache counter. Since flow
97 cache counter is reset on any policy add/remove, but
98 hash table values are not, we need to check if the entry
99 we are overwriting is stale or not. If it's a stale entry
100 overwrite, we still want to increment flow cache counter */
101 is_overwrite = (im->ipsec4_in_spd_hash_tbl[hash].value != 0);
102 /* Check if we are overwriting a stale entry by comparing
103 with current epoch count */
104 if (PREDICT_FALSE (is_overwrite))
106 (im->input_epoch_count !=
107 ((u32) (im->ipsec4_in_spd_hash_tbl[hash].value & 0xFFFFFFFF)));
108 clib_memcpy_fast (&im->ipsec4_in_spd_hash_tbl[hash], &ip4_tuple.kv_16_8,
109 sizeof (ip4_tuple.kv_16_8));
110 ipsec_spinlock_unlock (&im->ipsec4_in_spd_hash_tbl[hash].bucket_lock);
112 /* Increment the counter to track active flow cache entries
113 when entering a fresh entry or overwriting a stale one */
114 if (!is_overwrite || is_stale_overwrite)
115 clib_atomic_fetch_add_relax (&im->ipsec4_in_spd_flow_cache_entries, 1);
120 always_inline ipsec_policy_t *
121 ipsec4_input_spd_find_flow_cache_entry (ipsec_main_t *im, u32 sa, u32 da,
122 ipsec_spd_policy_type_t policy_type)
124 ipsec_policy_t *p = NULL;
125 ipsec4_hash_kv_16_8_t kv_result;
127 ipsec4_inbound_spd_tuple_t ip4_tuple = { .ip4_src_addr = (ip4_address_t) sa,
128 .ip4_dest_addr = (ip4_address_t) da,
129 .policy_type = policy_type };
131 hash = ipsec4_hash_16_8 (&ip4_tuple.kv_16_8);
132 hash &= (im->ipsec4_in_spd_hash_num_buckets - 1);
134 ipsec_spinlock_lock (&im->ipsec4_in_spd_hash_tbl[hash].bucket_lock);
135 kv_result = im->ipsec4_in_spd_hash_tbl[hash];
136 ipsec_spinlock_unlock (&im->ipsec4_in_spd_hash_tbl[hash].bucket_lock);
138 if (ipsec4_hash_key_compare_16_8 ((u64 *) &ip4_tuple.kv_16_8,
141 if (im->input_epoch_count == ((u32) (kv_result.value & 0xFFFFFFFF)))
143 /* Get the policy based on the index */
145 pool_elt_at_index (im->policies, ((u32) (kv_result.value >> 32)));
152 always_inline ipsec_policy_t *
153 ipsec_input_policy_match (ipsec_spd_t *spd, u32 sa, u32 da,
154 ipsec_spd_policy_type_t policy_type)
156 ipsec_main_t *im = &ipsec_main;
160 vec_foreach (i, spd->policies[policy_type])
162 p = pool_elt_at_index (im->policies, *i);
164 if (da < clib_net_to_host_u32 (p->laddr.start.ip4.as_u32))
167 if (da > clib_net_to_host_u32 (p->laddr.stop.ip4.as_u32))
170 if (sa < clib_net_to_host_u32 (p->raddr.start.ip4.as_u32))
173 if (sa > clib_net_to_host_u32 (p->raddr.stop.ip4.as_u32))
176 if (im->input_flow_cache_flag)
178 /* Add an Entry in Flow cache */
179 ipsec4_input_spd_add_flow_cache_entry (im, sa, da, policy_type, *i);
186 always_inline ipsec_policy_t *
187 ipsec_input_protect_policy_match (ipsec_spd_t *spd, u32 sa, u32 da, u32 spi)
189 ipsec_main_t *im = &ipsec_main;
194 vec_foreach (i, spd->policies[IPSEC_SPD_POLICY_IP4_INBOUND_PROTECT])
196 p = pool_elt_at_index (im->policies, *i);
197 s = ipsec_sa_get (p->sa_index);
202 if (ipsec_sa_is_set_IS_TUNNEL (s))
204 if (da != clib_net_to_host_u32 (s->tunnel.t_dst.ip.ip4.as_u32))
207 if (sa != clib_net_to_host_u32 (s->tunnel.t_src.ip.ip4.as_u32))
213 if (da < clib_net_to_host_u32 (p->laddr.start.ip4.as_u32))
216 if (da > clib_net_to_host_u32 (p->laddr.stop.ip4.as_u32))
219 if (sa < clib_net_to_host_u32 (p->raddr.start.ip4.as_u32))
222 if (sa > clib_net_to_host_u32 (p->raddr.stop.ip4.as_u32))
226 if (im->input_flow_cache_flag)
228 /* Add an Entry in Flow cache */
229 ipsec4_input_spd_add_flow_cache_entry (
230 im, sa, da, IPSEC_SPD_POLICY_IP4_INBOUND_PROTECT, *i);
239 ip6_addr_match_range (ip6_address_t * a, ip6_address_t * la,
242 if ((memcmp (a->as_u64, la->as_u64, 2 * sizeof (u64)) >= 0) &&
243 (memcmp (a->as_u64, ua->as_u64, 2 * sizeof (u64)) <= 0))
248 always_inline ipsec_policy_t *
249 ipsec6_input_protect_policy_match (ipsec_spd_t * spd,
251 ip6_address_t * da, u32 spi)
253 ipsec_main_t *im = &ipsec_main;
258 vec_foreach (i, spd->policies[IPSEC_SPD_POLICY_IP6_INBOUND_PROTECT])
260 p = pool_elt_at_index (im->policies, *i);
261 s = ipsec_sa_get (p->sa_index);
266 if (ipsec_sa_is_set_IS_TUNNEL (s))
268 if (!ip6_address_is_equal (sa, &s->tunnel.t_src.ip.ip6))
271 if (!ip6_address_is_equal (da, &s->tunnel.t_dst.ip.ip6))
277 if (!ip6_addr_match_range (sa, &p->raddr.start.ip6, &p->raddr.stop.ip6))
280 if (!ip6_addr_match_range (da, &p->laddr.start.ip6, &p->laddr.stop.ip6))
288 extern vlib_node_registration_t ipsec4_input_node;
290 VLIB_NODE_FN (ipsec4_input_node) (vlib_main_t * vm,
291 vlib_node_runtime_t * node,
292 vlib_frame_t * frame)
294 u32 n_left_from, *from, thread_index;
295 ipsec_main_t *im = &ipsec_main;
296 u64 ipsec_unprocessed = 0, ipsec_matched = 0;
297 u64 ipsec_dropped = 0, ipsec_bypassed = 0;
298 vlib_buffer_t *bufs[VLIB_FRAME_SIZE];
299 vlib_buffer_t **b = bufs;
300 u16 nexts[VLIB_FRAME_SIZE], *next;
302 from = vlib_frame_vector_args (frame);
303 n_left_from = frame->n_vectors;
305 vlib_get_buffers (vm, from, bufs, n_left_from);
306 thread_index = vm->thread_index;
309 while (n_left_from > 0)
313 esp_header_t *esp0 = NULL;
315 ip4_ipsec_config_t *c0;
317 ipsec_policy_t *p0 = NULL;
319 bool search_flow_cache = false;
323 vlib_prefetch_buffer_data (b[1], LOAD);
326 b[0]->flags |= VNET_BUFFER_F_IS_IP4;
327 b[0]->flags &= ~VNET_BUFFER_F_IS_IP6;
328 c0 = vnet_feature_next_with_data (&next32, b[0], sizeof (c0[0]));
329 next[0] = (u16) next32;
331 spd0 = pool_elt_at_index (im->spds, c0->spd_index);
333 ip0 = vlib_buffer_get_current (b[0]);
336 (ip0->protocol == IP_PROTOCOL_IPSEC_ESP
337 || ip0->protocol == IP_PROTOCOL_UDP))
340 esp0 = (esp_header_t *) ((u8 *) ip0 + ip4_header_bytes (ip0));
341 if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_UDP))
343 /* FIXME Skip, if not a UDP encapsulated packet */
344 esp0 = (esp_header_t *) ((u8 *) esp0 + sizeof (udp_header_t));
347 // if flow cache is enabled, first search through flow cache for a
348 // policy match for either protect, bypass or discard rules, in that
349 // order. if no match is found search_flow_cache is set to false (1)
350 // and we revert back to linear search
351 search_flow_cache = im->input_flow_cache_flag;
354 if (search_flow_cache) // attempt to match policy in flow cache
356 p0 = ipsec4_input_spd_find_flow_cache_entry (
357 im, ip0->src_address.as_u32, ip0->dst_address.as_u32,
358 IPSEC_SPD_POLICY_IP4_INBOUND_PROTECT);
361 else // linear search if flow cache is not enabled,
362 // or flow cache search just failed
364 p0 = ipsec_input_protect_policy_match (
365 spd0, clib_net_to_host_u32 (ip0->src_address.as_u32),
366 clib_net_to_host_u32 (ip0->dst_address.as_u32),
367 clib_net_to_host_u32 (esp0->spi));
371 vlib_buffer_has_space (b[0],
372 (clib_address_t) (esp0 + 1) -
373 (clib_address_t) ip0);
375 if (PREDICT_TRUE ((p0 != NULL) & (has_space0)))
379 pi0 = p0 - im->policies;
380 vlib_increment_combined_counter
381 (&ipsec_spd_policy_counters,
382 thread_index, pi0, 1, clib_net_to_host_u16 (ip0->length));
384 vnet_buffer (b[0])->ipsec.sad_index = p0->sa_index;
385 next[0] = im->esp4_decrypt_next_index;
386 vlib_buffer_advance (b[0], ((u8 *) esp0 - (u8 *) ip0));
395 if (search_flow_cache)
397 p0 = ipsec4_input_spd_find_flow_cache_entry (
398 im, ip0->src_address.as_u32, ip0->dst_address.as_u32,
399 IPSEC_SPD_POLICY_IP4_INBOUND_BYPASS);
404 p0 = ipsec_input_policy_match (
405 spd0, clib_net_to_host_u32 (ip0->src_address.as_u32),
406 clib_net_to_host_u32 (ip0->dst_address.as_u32),
407 IPSEC_SPD_POLICY_IP4_INBOUND_BYPASS);
410 if (PREDICT_TRUE ((p0 != NULL)))
414 pi0 = p0 - im->policies;
415 vlib_increment_combined_counter (
416 &ipsec_spd_policy_counters, thread_index, pi0, 1,
417 clib_net_to_host_u16 (ip0->length));
427 if (search_flow_cache)
429 p0 = ipsec4_input_spd_find_flow_cache_entry (
430 im, ip0->src_address.as_u32, ip0->dst_address.as_u32,
431 IPSEC_SPD_POLICY_IP4_INBOUND_DISCARD);
436 p0 = ipsec_input_policy_match (
437 spd0, clib_net_to_host_u32 (ip0->src_address.as_u32),
438 clib_net_to_host_u32 (ip0->dst_address.as_u32),
439 IPSEC_SPD_POLICY_IP4_INBOUND_DISCARD);
442 if (PREDICT_TRUE ((p0 != NULL)))
446 pi0 = p0 - im->policies;
447 vlib_increment_combined_counter (
448 &ipsec_spd_policy_counters, thread_index, pi0, 1,
449 clib_net_to_host_u16 (ip0->length));
451 next[0] = IPSEC_INPUT_NEXT_DROP;
460 // flow cache search failed, try again with linear search
461 if (search_flow_cache && p0 == NULL)
463 search_flow_cache = false;
467 /* Drop by default if no match on PROTECT, BYPASS or DISCARD */
468 ipsec_unprocessed += 1;
469 next[0] = IPSEC_INPUT_NEXT_DROP;
472 if (PREDICT_FALSE (node->flags & VLIB_NODE_FLAG_TRACE) &&
473 PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_IS_TRACED))
475 ipsec_input_trace_t *tr =
476 vlib_add_trace (vm, node, b[0], sizeof (*tr));
478 tr->proto = ip0->protocol;
479 tr->sa_id = p0 ? p0->sa_id : ~0;
480 tr->spi = has_space0 ? clib_net_to_host_u32 (esp0->spi) : ~0;
481 tr->seq = has_space0 ? clib_net_to_host_u32 (esp0->seq) : ~0;
483 tr->policy_index = pi0;
486 else if (ip0->protocol == IP_PROTOCOL_IPSEC_AH)
488 ah0 = (ah_header_t *) ((u8 *) ip0 + ip4_header_bytes (ip0));
490 // if flow cache is enabled, first search through flow cache for a
491 // policy match and revert back to linear search on failure
492 search_flow_cache = im->input_flow_cache_flag;
495 if (search_flow_cache)
497 p0 = ipsec4_input_spd_find_flow_cache_entry (
498 im, ip0->src_address.as_u32, ip0->dst_address.as_u32,
499 IPSEC_SPD_POLICY_IP4_INBOUND_PROTECT);
504 p0 = ipsec_input_protect_policy_match (
505 spd0, clib_net_to_host_u32 (ip0->src_address.as_u32),
506 clib_net_to_host_u32 (ip0->dst_address.as_u32),
507 clib_net_to_host_u32 (ah0->spi));
511 vlib_buffer_has_space (b[0],
512 (clib_address_t) (ah0 + 1) -
513 (clib_address_t) ip0);
515 if (PREDICT_TRUE ((p0 != NULL) & (has_space0)))
519 pi0 = p0 - im->policies;
520 vlib_increment_combined_counter
521 (&ipsec_spd_policy_counters,
522 thread_index, pi0, 1, clib_net_to_host_u16 (ip0->length));
524 vnet_buffer (b[0])->ipsec.sad_index = p0->sa_index;
525 next[0] = im->ah4_decrypt_next_index;
534 if (search_flow_cache)
536 p0 = ipsec4_input_spd_find_flow_cache_entry (
537 im, ip0->src_address.as_u32, ip0->dst_address.as_u32,
538 IPSEC_SPD_POLICY_IP4_INBOUND_BYPASS);
543 p0 = ipsec_input_policy_match (
544 spd0, clib_net_to_host_u32 (ip0->src_address.as_u32),
545 clib_net_to_host_u32 (ip0->dst_address.as_u32),
546 IPSEC_SPD_POLICY_IP4_INBOUND_BYPASS);
549 if (PREDICT_TRUE ((p0 != NULL)))
553 pi0 = p0 - im->policies;
554 vlib_increment_combined_counter (
555 &ipsec_spd_policy_counters, thread_index, pi0, 1,
556 clib_net_to_host_u16 (ip0->length));
566 if (search_flow_cache)
568 p0 = ipsec4_input_spd_find_flow_cache_entry (
569 im, ip0->src_address.as_u32, ip0->dst_address.as_u32,
570 IPSEC_SPD_POLICY_IP4_INBOUND_DISCARD);
575 p0 = ipsec_input_policy_match (
576 spd0, clib_net_to_host_u32 (ip0->src_address.as_u32),
577 clib_net_to_host_u32 (ip0->dst_address.as_u32),
578 IPSEC_SPD_POLICY_IP4_INBOUND_DISCARD);
581 if (PREDICT_TRUE ((p0 != NULL)))
585 pi0 = p0 - im->policies;
586 vlib_increment_combined_counter (
587 &ipsec_spd_policy_counters, thread_index, pi0, 1,
588 clib_net_to_host_u16 (ip0->length));
590 next[0] = IPSEC_INPUT_NEXT_DROP;
599 // flow cache search failed, retry with linear search
600 if (search_flow_cache && p0 == NULL)
602 search_flow_cache = false;
606 /* Drop by default if no match on PROTECT, BYPASS or DISCARD */
607 ipsec_unprocessed += 1;
608 next[0] = IPSEC_INPUT_NEXT_DROP;
611 if (PREDICT_FALSE (node->flags & VLIB_NODE_FLAG_TRACE) &&
612 PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_IS_TRACED))
614 ipsec_input_trace_t *tr =
615 vlib_add_trace (vm, node, b[0], sizeof (*tr));
617 tr->proto = ip0->protocol;
618 tr->sa_id = p0 ? p0->sa_id : ~0;
619 tr->spi = has_space0 ? clib_net_to_host_u32 (ah0->spi) : ~0;
620 tr->seq = has_space0 ? clib_net_to_host_u32 (ah0->seq_no) : ~0;
622 tr->policy_index = pi0;
627 ipsec_unprocessed += 1;
634 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
636 vlib_node_increment_counter (vm, ipsec4_input_node.index,
637 IPSEC_INPUT_ERROR_RX_PKTS, frame->n_vectors);
639 vlib_node_increment_counter (vm, ipsec4_input_node.index,
640 IPSEC_INPUT_ERROR_RX_POLICY_MATCH,
643 vlib_node_increment_counter (vm, ipsec4_input_node.index,
644 IPSEC_INPUT_ERROR_RX_POLICY_NO_MATCH,
647 vlib_node_increment_counter (vm, ipsec4_input_node.index,
648 IPSEC_INPUT_ERROR_RX_POLICY_DISCARD,
651 vlib_node_increment_counter (vm, ipsec4_input_node.index,
652 IPSEC_INPUT_ERROR_RX_POLICY_BYPASS,
655 return frame->n_vectors;
660 VLIB_REGISTER_NODE (ipsec4_input_node) = {
661 .name = "ipsec4-input-feature",
662 .vector_size = sizeof (u32),
663 .format_trace = format_ipsec_input_trace,
664 .type = VLIB_NODE_TYPE_INTERNAL,
665 .n_errors = ARRAY_LEN(ipsec_input_error_strings),
666 .error_strings = ipsec_input_error_strings,
667 .n_next_nodes = IPSEC_INPUT_N_NEXT,
669 #define _(s,n) [IPSEC_INPUT_NEXT_##s] = n,
670 foreach_ipsec_input_next
676 extern vlib_node_registration_t ipsec6_input_node;
679 VLIB_NODE_FN (ipsec6_input_node) (vlib_main_t * vm,
680 vlib_node_runtime_t * node,
681 vlib_frame_t * from_frame)
683 u32 n_left_from, *from, next_index, *to_next, thread_index;
684 ipsec_main_t *im = &ipsec_main;
685 u32 ipsec_unprocessed = 0;
686 u32 ipsec_matched = 0;
688 from = vlib_frame_vector_args (from_frame);
689 n_left_from = from_frame->n_vectors;
690 thread_index = vm->thread_index;
692 next_index = node->cached_next_index;
694 while (n_left_from > 0)
698 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
700 while (n_left_from > 0 && n_left_to_next > 0)
706 ip4_ipsec_config_t *c0;
708 ipsec_policy_t *p0 = 0;
710 u32 header_size = sizeof (ip0[0]);
712 bi0 = to_next[0] = from[0];
718 b0 = vlib_get_buffer (vm, bi0);
719 b0->flags |= VNET_BUFFER_F_IS_IP6;
720 b0->flags &= ~VNET_BUFFER_F_IS_IP4;
721 c0 = vnet_feature_next_with_data (&next0, b0, sizeof (c0[0]));
723 spd0 = pool_elt_at_index (im->spds, c0->spd_index);
725 ip0 = vlib_buffer_get_current (b0);
726 esp0 = (esp_header_t *) ((u8 *) ip0 + header_size);
727 ah0 = (ah_header_t *) ((u8 *) ip0 + header_size);
729 if (PREDICT_TRUE (ip0->protocol == IP_PROTOCOL_IPSEC_ESP))
733 ("packet received from %U to %U spi %u size %u spd_id %u",
734 format_ip6_address, &ip0->src_address, format_ip6_address,
735 &ip0->dst_address, clib_net_to_host_u32 (esp0->spi),
736 clib_net_to_host_u16 (ip0->payload_length) + header_size,
739 p0 = ipsec6_input_protect_policy_match (spd0,
745 if (PREDICT_TRUE (p0 != 0))
749 pi0 = p0 - im->policies;
750 vlib_increment_combined_counter
751 (&ipsec_spd_policy_counters,
752 thread_index, pi0, 1,
753 clib_net_to_host_u16 (ip0->payload_length) +
756 vnet_buffer (b0)->ipsec.sad_index = p0->sa_index;
757 next0 = im->esp6_decrypt_next_index;
758 vlib_buffer_advance (b0, header_size);
764 ipsec_unprocessed += 1;
765 next0 = IPSEC_INPUT_NEXT_DROP;
768 else if (ip0->protocol == IP_PROTOCOL_IPSEC_AH)
770 p0 = ipsec6_input_protect_policy_match (spd0,
776 if (PREDICT_TRUE (p0 != 0))
779 pi0 = p0 - im->policies;
780 vlib_increment_combined_counter
781 (&ipsec_spd_policy_counters,
782 thread_index, pi0, 1,
783 clib_net_to_host_u16 (ip0->payload_length) +
786 vnet_buffer (b0)->ipsec.sad_index = p0->sa_index;
787 next0 = im->ah6_decrypt_next_index;
793 ipsec_unprocessed += 1;
794 next0 = IPSEC_INPUT_NEXT_DROP;
799 ipsec_unprocessed += 1;
803 if (PREDICT_FALSE (node->flags & VLIB_NODE_FLAG_TRACE) &&
804 PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
806 ipsec_input_trace_t *tr =
807 vlib_add_trace (vm, node, b0, sizeof (*tr));
810 tr->sa_id = p0->sa_id;
811 tr->proto = ip0->protocol;
812 tr->spi = clib_net_to_host_u32 (esp0->spi);
813 tr->seq = clib_net_to_host_u32 (esp0->seq);
817 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
818 n_left_to_next, bi0, next0);
820 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
823 vlib_node_increment_counter (vm, ipsec6_input_node.index,
824 IPSEC_INPUT_ERROR_RX_PKTS,
825 from_frame->n_vectors - ipsec_unprocessed);
827 vlib_node_increment_counter (vm, ipsec6_input_node.index,
828 IPSEC_INPUT_ERROR_RX_POLICY_MATCH,
831 return from_frame->n_vectors;
836 VLIB_REGISTER_NODE (ipsec6_input_node) = {
837 .name = "ipsec6-input-feature",
838 .vector_size = sizeof (u32),
839 .format_trace = format_ipsec_input_trace,
840 .type = VLIB_NODE_TYPE_INTERNAL,
841 .n_errors = ARRAY_LEN(ipsec_input_error_strings),
842 .error_strings = ipsec_input_error_strings,
843 .n_next_nodes = IPSEC_INPUT_N_NEXT,
845 #define _(s,n) [IPSEC_INPUT_NEXT_##s] = n,
846 foreach_ipsec_input_next
853 * fd.io coding-style-patch-verification: ON
856 * eval: (c-set-style "gnu")