2 * esp_decrypt.c : IPSec ESP decrypt node
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/l2/l2_input.h>
23 #include <vnet/ipsec/ipsec.h>
24 #include <vnet/ipsec/esp.h>
25 #include <vnet/ipsec/ipsec_io.h>
26 #include <vnet/ipsec/ipsec_tun.h>
28 #include <vnet/gre/packet.h>
30 #define foreach_esp_decrypt_next \
31 _ (DROP, "error-drop") \
32 _ (IP4_INPUT, "ip4-input-no-checksum") \
33 _ (IP6_INPUT, "ip6-input") \
34 _ (L2_INPUT, "l2-input") \
35 _ (MPLS_INPUT, "mpls-input") \
36 _ (HANDOFF, "handoff")
38 #define _(v, s) ESP_DECRYPT_NEXT_##v,
41 foreach_esp_decrypt_next
46 #define foreach_esp_decrypt_post_next \
47 _ (DROP, "error-drop") \
48 _ (IP4_INPUT, "ip4-input-no-checksum") \
49 _ (IP6_INPUT, "ip6-input") \
50 _ (MPLS_INPUT, "mpls-input") \
51 _ (L2_INPUT, "l2-input")
53 #define _(v, s) ESP_DECRYPT_POST_NEXT_##v,
56 foreach_esp_decrypt_post_next
58 ESP_DECRYPT_POST_N_NEXT,
59 } esp_decrypt_post_next_t;
61 #define foreach_esp_decrypt_error \
62 _(RX_PKTS, "ESP pkts received") \
63 _(RX_POST_PKTS, "ESP-POST pkts received") \
64 _(DECRYPTION_FAILED, "ESP decryption failed") \
65 _(INTEG_ERROR, "Integrity check failed") \
66 _(CRYPTO_ENGINE_ERROR, "crypto engine error (packet dropped)") \
67 _(REPLAY, "SA replayed packet") \
68 _(RUNT, "undersized packet") \
69 _(NO_BUFFERS, "no buffers (packet dropped)") \
70 _(OVERSIZED_HEADER, "buffer with oversized header (dropped)") \
71 _(NO_TAIL_SPACE, "no enough buffer tail space (dropped)") \
72 _(TUN_NO_PROTO, "no tunnel protocol") \
73 _(UNSUP_PAYLOAD, "unsupported payload") \
78 #define _(sym,str) ESP_DECRYPT_ERROR_##sym,
79 foreach_esp_decrypt_error
82 } esp_decrypt_error_t;
84 static char *esp_decrypt_error_strings[] = {
85 #define _(sym,string) string,
86 foreach_esp_decrypt_error
95 ipsec_crypto_alg_t crypto_alg;
96 ipsec_integ_alg_t integ_alg;
97 } esp_decrypt_trace_t;
99 /* packet trace format function */
101 format_esp_decrypt_trace (u8 * s, va_list * args)
103 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
104 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
105 esp_decrypt_trace_t *t = va_arg (*args, esp_decrypt_trace_t *);
109 "esp: crypto %U integrity %U pkt-seq %d sa-seq %u sa-seq-hi %u",
110 format_ipsec_crypto_alg, t->crypto_alg, format_ipsec_integ_alg,
111 t->integ_alg, t->seq, t->sa_seq, t->sa_seq_hi);
115 #define ESP_ENCRYPT_PD_F_FD_TRANSPORT (1 << 2)
117 static_always_inline void
118 esp_process_ops (vlib_main_t * vm, vlib_node_runtime_t * node,
119 vnet_crypto_op_t * ops, vlib_buffer_t * b[], u16 * nexts,
122 vnet_crypto_op_t *op = ops;
123 u32 n_fail, n_ops = vec_len (ops);
128 n_fail = n_ops - vnet_crypto_process_ops (vm, op, n_ops);
132 ASSERT (op - ops < n_ops);
133 if (op->status != VNET_CRYPTO_OP_STATUS_COMPLETED)
135 u32 err, bi = op->user_data;
136 if (op->status == VNET_CRYPTO_OP_STATUS_FAIL_BAD_HMAC)
139 err = ESP_DECRYPT_ERROR_CRYPTO_ENGINE_ERROR;
140 b[bi]->error = node->errors[err];
141 nexts[bi] = ESP_DECRYPT_NEXT_DROP;
148 static_always_inline void
149 esp_process_chained_ops (vlib_main_t * vm, vlib_node_runtime_t * node,
150 vnet_crypto_op_t * ops, vlib_buffer_t * b[],
151 u16 * nexts, vnet_crypto_op_chunk_t * chunks, int e)
154 vnet_crypto_op_t *op = ops;
155 u32 n_fail, n_ops = vec_len (ops);
160 n_fail = n_ops - vnet_crypto_process_chained_ops (vm, op, chunks, n_ops);
164 ASSERT (op - ops < n_ops);
165 if (op->status != VNET_CRYPTO_OP_STATUS_COMPLETED)
167 u32 err, bi = op->user_data;
168 if (op->status == VNET_CRYPTO_OP_STATUS_FAIL_BAD_HMAC)
171 err = ESP_DECRYPT_ERROR_CRYPTO_ENGINE_ERROR;
172 b[bi]->error = node->errors[err];
173 nexts[bi] = ESP_DECRYPT_NEXT_DROP;
181 esp_remove_tail (vlib_main_t * vm, vlib_buffer_t * b, vlib_buffer_t * last,
184 vlib_buffer_t *before_last = b;
186 if (last->current_length > tail)
188 last->current_length -= tail;
191 ASSERT (b->flags & VLIB_BUFFER_NEXT_PRESENT);
193 while (b->flags & VLIB_BUFFER_NEXT_PRESENT)
196 b = vlib_get_buffer (vm, b->next_buffer);
198 before_last->current_length -= tail - last->current_length;
199 vlib_buffer_free_one (vm, before_last->next_buffer);
200 before_last->flags &= ~VLIB_BUFFER_NEXT_PRESENT;
203 /* ICV is splitted in last two buffers so move it to the last buffer and
204 return pointer to it */
205 static_always_inline u8 *
206 esp_move_icv (vlib_main_t * vm, vlib_buffer_t * first,
207 esp_decrypt_packet_data_t * pd,
208 esp_decrypt_packet_data2_t * pd2, u16 icv_sz, u16 * dif)
210 vlib_buffer_t *before_last, *bp;
211 u16 last_sz = pd2->lb->current_length;
212 u16 first_sz = icv_sz - last_sz;
214 bp = before_last = first;
215 while (bp->flags & VLIB_BUFFER_NEXT_PRESENT)
218 bp = vlib_get_buffer (vm, bp->next_buffer);
221 u8 *lb_curr = vlib_buffer_get_current (pd2->lb);
222 memmove (lb_curr + first_sz, lb_curr, last_sz);
223 clib_memcpy_fast (lb_curr, vlib_buffer_get_tail (before_last) - first_sz,
225 before_last->current_length -= first_sz;
226 if (before_last == first)
227 pd->current_length -= first_sz;
228 clib_memset (vlib_buffer_get_tail (before_last), 0, first_sz);
231 pd2->lb = before_last;
232 pd2->icv_removed = 1;
233 pd2->free_buffer_index = before_last->next_buffer;
234 before_last->flags &= ~VLIB_BUFFER_NEXT_PRESENT;
238 static_always_inline i16
239 esp_insert_esn (vlib_main_t * vm, ipsec_sa_t * sa,
240 esp_decrypt_packet_data2_t * pd2, u32 * data_len,
241 u8 ** digest, u16 * len, vlib_buffer_t * b, u8 * payload)
243 if (!ipsec_sa_is_set_USE_ESN (sa))
246 /* shift ICV by 4 bytes to insert ESN */
247 u32 seq_hi = clib_host_to_net_u32 (sa->seq_hi);
248 u8 tmp[ESP_MAX_ICV_SIZE], sz = sizeof (sa->seq_hi);
250 if (pd2->icv_removed)
252 u16 space_left = vlib_buffer_space_left_at_end (vm, pd2->lb);
253 if (space_left >= sz)
255 clib_memcpy_fast (vlib_buffer_get_tail (pd2->lb), &seq_hi, sz);
261 len[0] = b->current_length;
265 clib_memcpy_fast (tmp, payload + len[0], ESP_MAX_ICV_SIZE);
266 clib_memcpy_fast (payload + len[0], &seq_hi, sz);
267 clib_memcpy_fast (payload + len[0] + sz, tmp, ESP_MAX_ICV_SIZE);
274 static_always_inline u8 *
275 esp_move_icv_esn (vlib_main_t * vm, vlib_buffer_t * first,
276 esp_decrypt_packet_data_t * pd,
277 esp_decrypt_packet_data2_t * pd2, u16 icv_sz,
278 ipsec_sa_t * sa, u8 * extra_esn, u32 * len)
281 u8 *digest = esp_move_icv (vm, first, pd, pd2, icv_sz, &dif);
285 if (ipsec_sa_is_set_USE_ESN (sa))
287 u8 sz = sizeof (sa->seq_hi);
288 u32 seq_hi = clib_host_to_net_u32 (sa->seq_hi);
289 u16 space_left = vlib_buffer_space_left_at_end (vm, pd2->lb);
291 if (space_left >= sz)
293 clib_memcpy_fast (vlib_buffer_get_tail (pd2->lb), &seq_hi, sz);
298 /* no space for ESN at the tail, use the next buffer
300 ASSERT (pd2->icv_removed);
301 vlib_buffer_t *tmp = vlib_get_buffer (vm, pd2->free_buffer_index);
302 clib_memcpy_fast (vlib_buffer_get_current (tmp) - sz, &seq_hi, sz);
309 static_always_inline int
310 esp_decrypt_chain_integ (vlib_main_t * vm, ipsec_per_thread_data_t * ptd,
311 esp_decrypt_packet_data2_t * pd2,
312 ipsec_sa_t * sa0, vlib_buffer_t * b, u8 icv_sz,
313 u8 * start_src, u32 start_len,
314 u8 ** digest, u16 * n_ch, u32 * integ_total_len)
316 vnet_crypto_op_chunk_t *ch;
317 vlib_buffer_t *cb = vlib_get_buffer (vm, b->next_buffer);
320 vec_add2 (ptd->chunks, ch, 1);
321 total_len = ch->len = start_len;
326 vec_add2 (ptd->chunks, ch, 1);
328 ch->src = vlib_buffer_get_current (cb);
331 if (pd2->icv_removed)
332 ch->len = cb->current_length;
334 ch->len = cb->current_length - icv_sz;
335 if (ipsec_sa_is_set_USE_ESN (sa0))
337 u32 seq_hi = clib_host_to_net_u32 (sa0->seq_hi);
338 u8 tmp[ESP_MAX_ICV_SIZE], sz = sizeof (sa0->seq_hi);
340 vlib_buffer_t *tmp_b;
341 u16 space_left = vlib_buffer_space_left_at_end (vm, pd2->lb);
344 if (pd2->icv_removed)
346 /* use pre-data area from the last bufer
347 that was removed from the chain */
348 tmp_b = vlib_get_buffer (vm, pd2->free_buffer_index);
349 esn = tmp_b->data - sz;
353 /* no space, need to allocate new buffer */
355 if (vlib_buffer_alloc (vm, &tmp_bi, 1) != 1)
357 tmp_b = vlib_get_buffer (vm, tmp_bi);
359 pd2->free_buffer_index = tmp_bi;
361 clib_memcpy_fast (esn, &seq_hi, sz);
363 vec_add2 (ptd->chunks, ch, 1);
370 if (pd2->icv_removed)
372 clib_memcpy_fast (vlib_buffer_get_tail
373 (pd2->lb), &seq_hi, sz);
377 clib_memcpy_fast (tmp, *digest, ESP_MAX_ICV_SIZE);
378 clib_memcpy_fast (*digest, &seq_hi, sz);
379 clib_memcpy_fast (*digest + sz, tmp, ESP_MAX_ICV_SIZE);
385 total_len += ch->len;
389 total_len += ch->len = cb->current_length;
391 if (!(cb->flags & VLIB_BUFFER_NEXT_PRESENT))
394 cb = vlib_get_buffer (vm, cb->next_buffer);
400 *integ_total_len = total_len;
405 static_always_inline u32
406 esp_decrypt_chain_crypto (vlib_main_t * vm, ipsec_per_thread_data_t * ptd,
407 esp_decrypt_packet_data_t * pd,
408 esp_decrypt_packet_data2_t * pd2,
409 ipsec_sa_t * sa0, vlib_buffer_t * b, u8 icv_sz,
410 u8 * start, u32 start_len, u8 ** tag, u16 * n_ch)
412 vnet_crypto_op_chunk_t *ch;
413 vlib_buffer_t *cb = b;
416 vec_add2 (ptd->chunks, ch, 1);
417 total_len = ch->len = start_len;
418 ch->src = ch->dst = start;
419 cb = vlib_get_buffer (vm, cb->next_buffer);
424 vec_add2 (ptd->chunks, ch, 1);
426 ch->src = ch->dst = vlib_buffer_get_current (cb);
429 if (ipsec_sa_is_set_IS_AEAD (sa0))
431 if (pd2->lb->current_length < icv_sz)
434 *tag = esp_move_icv (vm, b, pd, pd2, icv_sz, &dif);
436 /* this chunk does not contain crypto data */
438 /* and fix previous chunk's length as it might have
440 ASSERT (n_chunks > 0);
448 total_len = total_len + pd2->lb->current_length -
450 ch[-1].len = pd2->lb->current_length;
455 *tag = vlib_buffer_get_tail (pd2->lb) - icv_sz;
458 if (pd2->icv_removed)
459 total_len += ch->len = cb->current_length;
461 total_len += ch->len = cb->current_length - icv_sz;
464 total_len += ch->len = cb->current_length;
466 if (!(cb->flags & VLIB_BUFFER_NEXT_PRESENT))
469 cb = vlib_get_buffer (vm, cb->next_buffer);
478 static_always_inline void
479 esp_decrypt_prepare_sync_op (vlib_main_t * vm, vlib_node_runtime_t * node,
480 ipsec_per_thread_data_t * ptd,
481 vnet_crypto_op_t *** crypto_ops,
482 vnet_crypto_op_t *** integ_ops,
483 vnet_crypto_op_t * op,
484 ipsec_sa_t * sa0, u8 * payload,
485 u16 len, u8 icv_sz, u8 iv_sz,
486 esp_decrypt_packet_data_t * pd,
487 esp_decrypt_packet_data2_t * pd2,
488 vlib_buffer_t * b, u16 * next, u32 index)
490 const u8 esp_sz = sizeof (esp_header_t);
492 if (PREDICT_TRUE (sa0->integ_op_id != VNET_CRYPTO_OP_NONE))
494 vnet_crypto_op_init (op, sa0->integ_op_id);
495 op->key_index = sa0->integ_key_index;
497 op->flags = VNET_CRYPTO_OP_FLAG_HMAC_CHECK;
498 op->user_data = index;
499 op->digest = payload + len;
500 op->digest_len = icv_sz;
505 /* buffer is chained */
506 op->len = pd->current_length;
508 /* special case when ICV is splitted and needs to be reassembled
509 * first -> move it to the last buffer. Also take into account
510 * that ESN needs to be added after encrypted data and may or
511 * may not fit in the tail.*/
512 if (pd2->lb->current_length < icv_sz)
516 esp_move_icv_esn (vm, b, pd, pd2, icv_sz, sa0,
517 &extra_esn, &op->len);
521 /* esn is in the last buffer, that was unlinked from
523 op->len = b->current_length;
529 /* we now have a single buffer of crypto data, adjust
530 * the length (second buffer contains only ICV) */
531 *integ_ops = &ptd->integ_ops;
532 *crypto_ops = &ptd->crypto_ops;
533 len = b->current_length;
539 op->digest = vlib_buffer_get_tail (pd2->lb) - icv_sz;
541 op->flags |= VNET_CRYPTO_OP_FLAG_CHAINED_BUFFERS;
542 op->chunk_index = vec_len (ptd->chunks);
543 if (esp_decrypt_chain_integ (vm, ptd, pd2, sa0, b, icv_sz,
544 payload, pd->current_length,
545 &op->digest, &op->n_chunks, 0) < 0)
547 b->error = node->errors[ESP_DECRYPT_ERROR_NO_BUFFERS];
548 next[0] = ESP_DECRYPT_NEXT_DROP;
553 esp_insert_esn (vm, sa0, pd2, &op->len, &op->digest, &len, b,
556 vec_add_aligned (*(integ_ops[0]), op, 1, CLIB_CACHE_LINE_BYTES);
562 if (sa0->crypto_dec_op_id != VNET_CRYPTO_OP_NONE)
564 vnet_crypto_op_init (op, sa0->crypto_dec_op_id);
565 op->key_index = sa0->crypto_key_index;
568 if (ipsec_sa_is_set_IS_CTR (sa0))
570 /* construct nonce in a scratch space in front of the IP header */
571 esp_ctr_nonce_t *nonce =
572 (esp_ctr_nonce_t *) (payload - esp_sz - pd->hdr_sz -
574 if (ipsec_sa_is_set_IS_AEAD (sa0))
576 /* constuct aad in a scratch space in front of the nonce */
577 esp_header_t *esp0 = (esp_header_t *) (payload - esp_sz);
578 op->aad = (u8 *) nonce - sizeof (esp_aead_t);
579 op->aad_len = esp_aad_fill (op->aad, esp0, sa0);
580 op->tag = payload + len;
585 nonce->ctr = clib_host_to_net_u32 (1);
587 nonce->salt = sa0->salt;
588 ASSERT (sizeof (u64) == iv_sz);
589 nonce->iv = *(u64 *) op->iv;
590 op->iv = (u8 *) nonce;
592 op->src = op->dst = payload += iv_sz;
593 op->len = len - iv_sz;
594 op->user_data = index;
596 if (pd->is_chain && (pd2->lb != b))
598 /* buffer is chained */
599 op->flags |= VNET_CRYPTO_OP_FLAG_CHAINED_BUFFERS;
600 op->chunk_index = vec_len (ptd->chunks);
601 esp_decrypt_chain_crypto (vm, ptd, pd, pd2, sa0, b, icv_sz,
602 payload, len - pd->iv_sz + pd->icv_sz,
603 &op->tag, &op->n_chunks);
606 vec_add_aligned (*(crypto_ops[0]), op, 1, CLIB_CACHE_LINE_BYTES);
610 static_always_inline int
611 esp_decrypt_prepare_async_frame (vlib_main_t * vm,
612 vlib_node_runtime_t * node,
613 ipsec_per_thread_data_t * ptd,
614 vnet_crypto_async_frame_t ** f,
615 ipsec_sa_t * sa0, u8 * payload, u16 len,
617 esp_decrypt_packet_data_t * pd,
618 esp_decrypt_packet_data2_t * pd2, u32 bi,
619 vlib_buffer_t * b, u16 * next,
622 const u8 esp_sz = sizeof (esp_header_t);
623 u32 current_protect_index = vnet_buffer (b)->ipsec.protect_index;
624 esp_decrypt_packet_data_t *async_pd = &(esp_post_data (b))->decrypt_data;
625 esp_decrypt_packet_data2_t *async_pd2 = esp_post_data2 (b);
626 u8 *tag = payload + len, *iv = payload + esp_sz, *aad = 0;
628 u32 crypto_len, integ_len = 0;
629 i16 crypto_start_offset, integ_start_offset = 0;
632 if (!ipsec_sa_is_set_IS_AEAD (sa0))
635 key_index = sa0->linked_key_index;
636 integ_start_offset = payload - b->data;
641 /* buffer is chained */
642 integ_len = pd->current_length;
644 /* special case when ICV is splitted and needs to be reassembled
645 * first -> move it to the last buffer. Also take into account
646 * that ESN needs to be added after encrypted data and may or
647 * may not fit in the tail.*/
648 if (pd2->lb->current_length < icv_sz)
651 tag = esp_move_icv_esn (vm, b, pd, pd2, icv_sz, sa0,
652 &extra_esn, &integ_len);
656 /* esn is in the last buffer, that was unlinked from
658 integ_len = b->current_length;
664 /* we now have a single buffer of crypto data, adjust
665 * the length (second buffer contains only ICV) */
666 len = b->current_length;
672 tag = vlib_buffer_get_tail (pd2->lb) - icv_sz;
674 flags |= VNET_CRYPTO_OP_FLAG_CHAINED_BUFFERS;
675 if (esp_decrypt_chain_integ (vm, ptd, pd2, sa0, b, icv_sz, payload,
676 pd->current_length, &tag,
679 /* allocate buffer failed, will not add to frame and drop */
680 b->error = node->errors[ESP_DECRYPT_ERROR_NO_BUFFERS];
681 next[0] = ESP_DECRYPT_NEXT_DROP;
686 esp_insert_esn (vm, sa0, pd2, &integ_len, &tag, &len, b, payload);
689 key_index = sa0->crypto_key_index;
697 if (ipsec_sa_is_set_IS_CTR (sa0))
699 /* construct nonce in a scratch space in front of the IP header */
700 esp_ctr_nonce_t *nonce =
701 (esp_ctr_nonce_t *) (payload - esp_sz - pd->hdr_sz - sizeof (*nonce));
702 if (ipsec_sa_is_set_IS_AEAD (sa0))
704 /* constuct aad in a scratch space in front of the nonce */
705 esp_header_t *esp0 = (esp_header_t *) (payload - esp_sz);
706 aad = (u8 *) nonce - sizeof (esp_aead_t);
707 esp_aad_fill (aad, esp0, sa0);
712 nonce->ctr = clib_host_to_net_u32 (1);
714 nonce->salt = sa0->salt;
715 ASSERT (sizeof (u64) == iv_sz);
716 nonce->iv = *(u64 *) iv;
720 crypto_start_offset = (payload += iv_sz) - b->data;
721 crypto_len = len - iv_sz;
723 if (pd->is_chain && (pd2->lb != b))
725 /* buffer is chained */
726 flags |= VNET_CRYPTO_OP_FLAG_CHAINED_BUFFERS;
728 crypto_len = esp_decrypt_chain_crypto (vm, ptd, pd, pd2, sa0, b, icv_sz,
730 len - pd->iv_sz + pd->icv_sz,
736 pd->protect_index = current_protect_index;
738 /* for AEAD integ_len - crypto_len will be negative, it is ok since it
739 * is ignored by the engine. */
740 return vnet_crypto_async_add_to_frame (vm, f, key_index, crypto_len,
741 integ_len - crypto_len,
744 bi, async_next, iv, tag, aad, flags);
747 static_always_inline void
748 esp_decrypt_post_crypto (vlib_main_t * vm, vlib_node_runtime_t * node,
749 esp_decrypt_packet_data_t * pd,
750 esp_decrypt_packet_data2_t * pd2, vlib_buffer_t * b,
751 u16 * next, int is_ip6, int is_tun, int is_async)
753 ipsec_main_t *im = &ipsec_main;
754 ipsec_sa_t *sa0 = vec_elt_at_index (im->sad, pd->sa_index);
755 vlib_buffer_t *lb = b;
756 const u8 esp_sz = sizeof (esp_header_t);
757 const u8 tun_flags = IPSEC_SA_FLAG_IS_TUNNEL | IPSEC_SA_FLAG_IS_TUNNEL_V6;
758 u8 pad_length = 0, next_header = 0;
762 * redo the anti-reply check
763 * in this frame say we have sequence numbers, s, s+1, s+1, s+1
764 * and s and s+1 are in the window. When we did the anti-replay
765 * check above we did so against the state of the window (W),
766 * after packet s-1. So each of the packets in the sequence will be
768 * This time s will be cheked against Ws-1, s+1 chceked against Ws
769 * (i.e. the window state is updated/advnaced)
770 * so this time the successive s+! packet will be dropped.
771 * This is a consequence of batching the decrypts. If the
772 * check-dcrypt-advance process was done for each packet it would
773 * be fine. But we batch the decrypts because it's much more efficient
774 * to do so in SW and if we offload to HW and the process is async.
776 * You're probably thinking, but this means an attacker can send the
777 * above sequence and cause VPP to perform decrpyts that will fail,
778 * and that's true. But if the attacker can determine s (a valid
779 * sequence number in the window) which is non-trivial, it can generate
780 * a sequence s, s+1, s+2, s+3, ... s+n and nothing will prevent any
781 * implementation, sequential or batching, from decrypting these.
783 if (ipsec_sa_anti_replay_check (sa0, pd->seq))
785 b->error = node->errors[ESP_DECRYPT_ERROR_REPLAY];
786 next[0] = ESP_DECRYPT_NEXT_DROP;
790 ipsec_sa_anti_replay_advance (sa0, pd->seq);
795 icv_sz = pd2->icv_removed ? 0 : pd->icv_sz;
796 if (pd2->free_buffer_index)
798 vlib_buffer_free_one (vm, pd2->free_buffer_index);
801 if (lb->current_length < sizeof (esp_footer_t) + icv_sz)
803 /* esp footer is either splitted in two buffers or in the before
806 vlib_buffer_t *before_last = b, *bp = b;
807 while (bp->flags & VLIB_BUFFER_NEXT_PRESENT)
810 bp = vlib_get_buffer (vm, bp->next_buffer);
812 u8 *bt = vlib_buffer_get_tail (before_last);
814 if (lb->current_length == icv_sz)
816 esp_footer_t *f = (esp_footer_t *) (bt - sizeof (*f));
817 pad_length = f->pad_length;
818 next_header = f->next_header;
822 pad_length = (bt - 1)[0];
823 next_header = ((u8 *) vlib_buffer_get_current (lb))[0];
829 (esp_footer_t *) (lb->data + lb->current_data +
830 lb->current_length - sizeof (esp_footer_t) -
832 pad_length = f->pad_length;
833 next_header = f->next_header;
840 (esp_footer_t *) (lb->data + lb->current_data + lb->current_length -
841 sizeof (esp_footer_t) - icv_sz);
842 pad_length = f->pad_length;
843 next_header = f->next_header;
846 u16 adv = pd->iv_sz + esp_sz;
847 u16 tail = sizeof (esp_footer_t) + pad_length + icv_sz;
848 u16 tail_orig = sizeof (esp_footer_t) + pad_length + pd->icv_sz;
849 b->flags &= ~VLIB_BUFFER_TOTAL_LENGTH_VALID;
851 if ((pd->flags & tun_flags) == 0 && !is_tun) /* transport mode */
853 u8 udp_sz = (is_ip6 == 0 && pd->flags & IPSEC_SA_FLAG_UDP_ENCAP) ?
854 sizeof (udp_header_t) : 0;
855 u16 ip_hdr_sz = pd->hdr_sz - udp_sz;
856 u8 *old_ip = b->data + pd->current_data - ip_hdr_sz - udp_sz;
857 u8 *ip = old_ip + adv + udp_sz;
859 if (is_ip6 && ip_hdr_sz > 64)
860 memmove (ip, old_ip, ip_hdr_sz);
862 clib_memcpy_le64 (ip, old_ip, ip_hdr_sz);
864 b->current_data = pd->current_data + adv - ip_hdr_sz;
865 b->current_length += ip_hdr_sz - adv;
866 esp_remove_tail (vm, b, lb, tail);
870 ip6_header_t *ip6 = (ip6_header_t *) ip;
871 u16 len = clib_net_to_host_u16 (ip6->payload_length);
872 len -= adv + tail_orig;
873 ip6->payload_length = clib_host_to_net_u16 (len);
874 ip6->protocol = next_header;
875 next[0] = ESP_DECRYPT_NEXT_IP6_INPUT;
879 ip4_header_t *ip4 = (ip4_header_t *) ip;
880 ip_csum_t sum = ip4->checksum;
881 u16 len = clib_net_to_host_u16 (ip4->length);
882 len = clib_host_to_net_u16 (len - adv - tail_orig - udp_sz);
883 sum = ip_csum_update (sum, ip4->protocol, next_header,
884 ip4_header_t, protocol);
885 sum = ip_csum_update (sum, ip4->length, len, ip4_header_t, length);
886 ip4->checksum = ip_csum_fold (sum);
887 ip4->protocol = next_header;
889 next[0] = ESP_DECRYPT_NEXT_IP4_INPUT;
894 if (PREDICT_TRUE (next_header == IP_PROTOCOL_IP_IN_IP))
896 next[0] = ESP_DECRYPT_NEXT_IP4_INPUT;
897 b->current_data = pd->current_data + adv;
898 b->current_length = pd->current_length - adv;
899 esp_remove_tail (vm, b, lb, tail);
901 else if (next_header == IP_PROTOCOL_IPV6)
903 next[0] = ESP_DECRYPT_NEXT_IP6_INPUT;
904 b->current_data = pd->current_data + adv;
905 b->current_length = pd->current_length - adv;
906 esp_remove_tail (vm, b, lb, tail);
908 else if (next_header == IP_PROTOCOL_MPLS_IN_IP)
910 next[0] = ESP_DECRYPT_NEXT_MPLS_INPUT;
911 b->current_data = pd->current_data + adv;
912 b->current_length = pd->current_length - adv;
913 esp_remove_tail (vm, b, lb, tail);
917 if (is_tun && next_header == IP_PROTOCOL_GRE)
921 b->current_data = pd->current_data + adv;
922 b->current_length = pd->current_length - adv - tail;
924 gre = vlib_buffer_get_current (b);
926 vlib_buffer_advance (b, sizeof (*gre));
928 switch (clib_net_to_host_u16 (gre->protocol))
930 case GRE_PROTOCOL_teb:
931 vnet_update_l2_len (b);
932 next[0] = ESP_DECRYPT_NEXT_L2_INPUT;
934 case GRE_PROTOCOL_ip4:
935 next[0] = ESP_DECRYPT_NEXT_IP4_INPUT;
937 case GRE_PROTOCOL_ip6:
938 next[0] = ESP_DECRYPT_NEXT_IP6_INPUT;
941 b->error = node->errors[ESP_DECRYPT_ERROR_UNSUP_PAYLOAD];
942 next[0] = ESP_DECRYPT_NEXT_DROP;
948 next[0] = ESP_DECRYPT_NEXT_DROP;
949 b->error = node->errors[ESP_DECRYPT_ERROR_UNSUP_PAYLOAD];
955 if (ipsec_sa_is_set_IS_PROTECT (sa0))
958 * There are two encap possibilities
959 * 1) the tunnel and ths SA are prodiving encap, i.e. it's
960 * MAC | SA-IP | TUN-IP | ESP | PAYLOAD
961 * implying the SA is in tunnel mode (on a tunnel interface)
962 * 2) only the tunnel provides encap
963 * MAC | TUN-IP | ESP | PAYLOAD
964 * implying the SA is in transport mode.
966 * For 2) we need only strip the tunnel encap and we're good.
967 * since the tunnel and crypto ecnap (int the tun=protect
968 * object) are the same and we verified above that these match
969 * for 1) we need to strip the SA-IP outer headers, to
970 * reveal the tunnel IP and then check that this matches
971 * the configured tunnel.
973 const ipsec_tun_protect_t *itp;
976 itp = ipsec_tun_protect_get (pd->protect_index);
979 ipsec_tun_protect_get (vnet_buffer (b)->
980 ipsec.protect_index);
982 if (PREDICT_TRUE (next_header == IP_PROTOCOL_IP_IN_IP))
984 const ip4_header_t *ip4;
986 ip4 = vlib_buffer_get_current (b);
988 if (!ip46_address_is_equal_v4 (&itp->itp_tun.src,
989 &ip4->dst_address) ||
990 !ip46_address_is_equal_v4 (&itp->itp_tun.dst,
993 next[0] = ESP_DECRYPT_NEXT_DROP;
994 b->error = node->errors[ESP_DECRYPT_ERROR_TUN_NO_PROTO];
997 else if (next_header == IP_PROTOCOL_IPV6)
999 const ip6_header_t *ip6;
1001 ip6 = vlib_buffer_get_current (b);
1003 if (!ip46_address_is_equal_v6 (&itp->itp_tun.src,
1004 &ip6->dst_address) ||
1005 !ip46_address_is_equal_v6 (&itp->itp_tun.dst,
1008 next[0] = ESP_DECRYPT_NEXT_DROP;
1009 b->error = node->errors[ESP_DECRYPT_ERROR_TUN_NO_PROTO];
1018 esp_decrypt_inline (vlib_main_t * vm,
1019 vlib_node_runtime_t * node, vlib_frame_t * from_frame,
1020 int is_ip6, int is_tun, u16 async_next)
1022 ipsec_main_t *im = &ipsec_main;
1023 u32 thread_index = vm->thread_index;
1025 ipsec_per_thread_data_t *ptd = vec_elt_at_index (im->ptd, thread_index);
1026 u32 *from = vlib_frame_vector_args (from_frame);
1027 u32 n_left = from_frame->n_vectors;
1028 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
1029 u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
1030 esp_decrypt_packet_data_t pkt_data[VLIB_FRAME_SIZE], *pd = pkt_data;
1031 esp_decrypt_packet_data2_t pkt_data2[VLIB_FRAME_SIZE], *pd2 = pkt_data2;
1032 esp_decrypt_packet_data_t cpd = { };
1033 u32 current_sa_index = ~0, current_sa_bytes = 0, current_sa_pkts = 0;
1034 const u8 esp_sz = sizeof (esp_header_t);
1035 ipsec_sa_t *sa0 = 0;
1036 vnet_crypto_op_t _op, *op = &_op;
1037 vnet_crypto_op_t **crypto_ops = &ptd->crypto_ops;
1038 vnet_crypto_op_t **integ_ops = &ptd->integ_ops;
1039 vnet_crypto_async_frame_t *async_frame = 0;
1040 int is_async = im->async_mode;
1041 vnet_crypto_async_op_id_t last_async_op = ~0;
1042 u16 n_async_drop = 0;
1044 vlib_get_buffers (vm, from, b, n_left);
1047 vec_reset_length (ptd->crypto_ops);
1048 vec_reset_length (ptd->integ_ops);
1049 vec_reset_length (ptd->chained_crypto_ops);
1050 vec_reset_length (ptd->chained_integ_ops);
1052 vec_reset_length (ptd->chunks);
1053 clib_memset_u16 (nexts, -1, n_left);
1062 vlib_prefetch_buffer_header (b[2], LOAD);
1063 p = vlib_buffer_get_current (b[1]);
1064 CLIB_PREFETCH (p, CLIB_CACHE_LINE_BYTES, LOAD);
1065 p -= CLIB_CACHE_LINE_BYTES;
1066 CLIB_PREFETCH (p, CLIB_CACHE_LINE_BYTES, LOAD);
1069 u32 n_bufs = vlib_buffer_chain_linearize (vm, b[0]);
1072 b[0]->error = node->errors[ESP_DECRYPT_ERROR_NO_BUFFERS];
1073 esp_set_next_index (is_async, from, nexts, from[b - bufs],
1074 &n_async_drop, ESP_DECRYPT_NEXT_DROP, next);
1075 next[0] = ESP_DECRYPT_NEXT_DROP;
1079 if (vnet_buffer (b[0])->ipsec.sad_index != current_sa_index)
1081 if (current_sa_pkts)
1082 vlib_increment_combined_counter (&ipsec_sa_counters, thread_index,
1086 current_sa_bytes = current_sa_pkts = 0;
1088 current_sa_index = vnet_buffer (b[0])->ipsec.sad_index;
1089 sa0 = pool_elt_at_index (im->sad, current_sa_index);
1091 /* fetch the second cacheline ASAP */
1092 CLIB_PREFETCH (sa0->cacheline1, CLIB_CACHE_LINE_BYTES, LOAD);
1093 cpd.icv_sz = sa0->integ_icv_size;
1094 cpd.iv_sz = sa0->crypto_iv_size;
1095 cpd.flags = sa0->flags;
1096 cpd.sa_index = current_sa_index;
1098 /* submit frame when op_id is different then the old one */
1099 if (is_async && last_async_op != sa0->crypto_async_dec_op_id)
1101 if (async_frame && async_frame->n_elts)
1103 if (vnet_crypto_async_submit_open_frame (vm, async_frame))
1104 esp_async_recycle_failed_submit (async_frame, b, from,
1105 nexts, &n_async_drop,
1106 ESP_DECRYPT_NEXT_DROP,
1107 ESP_DECRYPT_ERROR_CRYPTO_ENGINE_ERROR);
1110 vnet_crypto_async_get_frame (vm, sa0->crypto_async_dec_op_id);
1111 last_async_op = sa0->crypto_async_dec_op_id;
1115 if (PREDICT_FALSE (~0 == sa0->thread_index))
1117 /* this is the first packet to use this SA, claim the SA
1118 * for this thread. this could happen simultaneously on
1120 clib_atomic_cmp_and_swap (&sa0->thread_index, ~0,
1121 ipsec_sa_assign_thread (thread_index));
1124 if (PREDICT_FALSE (thread_index != sa0->thread_index))
1126 vnet_buffer (b[0])->ipsec.thread_index = sa0->thread_index;
1127 esp_set_next_index (is_async, from, nexts, from[b - bufs],
1128 &n_async_drop, ESP_DECRYPT_NEXT_HANDOFF, next);
1129 next[0] = ESP_DECRYPT_NEXT_HANDOFF;
1133 /* store packet data for next round for easier prefetch */
1134 pd->sa_data = cpd.sa_data;
1135 pd->current_data = b[0]->current_data;
1136 pd->hdr_sz = pd->current_data - vnet_buffer (b[0])->l3_hdr_offset;
1137 payload = b[0]->data + pd->current_data;
1138 pd->seq = clib_host_to_net_u32 (((esp_header_t *) payload)->seq);
1141 pd2->free_buffer_index = 0;
1142 pd2->icv_removed = 0;
1147 /* find last buffer in the chain */
1148 while (pd2->lb->flags & VLIB_BUFFER_NEXT_PRESENT)
1149 pd2->lb = vlib_get_buffer (vm, pd2->lb->next_buffer);
1151 crypto_ops = &ptd->chained_crypto_ops;
1152 integ_ops = &ptd->chained_integ_ops;
1155 pd->current_length = b[0]->current_length;
1157 /* anti-reply check */
1158 if (ipsec_sa_anti_replay_check (sa0, pd->seq))
1160 b[0]->error = node->errors[ESP_DECRYPT_ERROR_REPLAY];
1161 esp_set_next_index (is_async, from, nexts, from[b - bufs],
1162 &n_async_drop, ESP_DECRYPT_NEXT_DROP, next);
1166 if (pd->current_length < cpd.icv_sz + esp_sz + cpd.iv_sz)
1168 b[0]->error = node->errors[ESP_DECRYPT_ERROR_RUNT];
1169 esp_set_next_index (is_async, from, nexts, from[b - bufs],
1170 &n_async_drop, ESP_DECRYPT_NEXT_DROP, next);
1174 len = pd->current_length - cpd.icv_sz;
1175 current_sa_pkts += 1;
1176 current_sa_bytes += vlib_buffer_length_in_chain (vm, b[0]);
1180 int ret = esp_decrypt_prepare_async_frame (vm, node, ptd,
1187 b[0], next, async_next);
1188 if (PREDICT_FALSE (ret < 0))
1190 b[0]->error = ESP_DECRYPT_ERROR_CRYPTO_ENGINE_ERROR;
1191 esp_set_next_index (1, from, nexts, from[b - bufs],
1192 &n_async_drop, ESP_DECRYPT_NEXT_DROP, next);
1193 /* when next[0] is ESP_DECRYPT_NEXT_DROP we only have to drop
1194 * the current packet. Otherwise it is frame submission error
1195 * thus we have to drop the whole frame.
1197 if (next[0] != ESP_DECRYPT_NEXT_DROP && async_frame->n_elts)
1198 esp_async_recycle_failed_submit (async_frame, b, from,
1199 nexts, &n_async_drop,
1200 ESP_DECRYPT_NEXT_DROP,
1201 ESP_DECRYPT_ERROR_CRYPTO_ENGINE_ERROR);
1206 esp_decrypt_prepare_sync_op (vm, node, ptd, &crypto_ops, &integ_ops,
1207 op, sa0, payload, len, cpd.icv_sz,
1208 cpd.iv_sz, pd, pd2, b[0], next,
1219 if (PREDICT_TRUE (~0 != current_sa_index))
1220 vlib_increment_combined_counter (&ipsec_sa_counters, thread_index,
1221 current_sa_index, current_sa_pkts,
1226 if (async_frame && async_frame->n_elts)
1228 if (vnet_crypto_async_submit_open_frame (vm, async_frame) < 0)
1229 esp_async_recycle_failed_submit (async_frame, b, from, nexts,
1231 ESP_DECRYPT_NEXT_DROP,
1232 ESP_DECRYPT_ERROR_CRYPTO_ENGINE_ERROR);
1235 /* no post process in async */
1236 vlib_node_increment_counter (vm, node->node_index,
1237 ESP_DECRYPT_ERROR_RX_PKTS, n_left);
1239 vlib_buffer_enqueue_to_next (vm, node, from, nexts, n_async_drop);
1245 esp_process_ops (vm, node, ptd->integ_ops, bufs, nexts,
1246 ESP_DECRYPT_ERROR_INTEG_ERROR);
1247 esp_process_chained_ops (vm, node, ptd->chained_integ_ops, bufs, nexts,
1248 ptd->chunks, ESP_DECRYPT_ERROR_INTEG_ERROR);
1250 esp_process_ops (vm, node, ptd->crypto_ops, bufs, nexts,
1251 ESP_DECRYPT_ERROR_DECRYPTION_FAILED);
1252 esp_process_chained_ops (vm, node, ptd->chained_crypto_ops, bufs, nexts,
1254 ESP_DECRYPT_ERROR_DECRYPTION_FAILED);
1257 /* Post decryption ronud - adjust packet data start and length and next
1260 n_left = from_frame->n_vectors;
1270 void *data = b[1]->data + pd[1].current_data;
1272 /* buffer metadata */
1273 vlib_prefetch_buffer_header (b[1], LOAD);
1276 CLIB_PREFETCH (data + pd[1].current_length - pd[1].icv_sz - 2,
1277 CLIB_CACHE_LINE_BYTES, LOAD);
1279 /* packet headers */
1280 CLIB_PREFETCH (data - CLIB_CACHE_LINE_BYTES,
1281 CLIB_CACHE_LINE_BYTES * 2, LOAD);
1284 /* save the sa_index as GRE_teb post_crypto changes L2 opaque */
1285 if (PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_IS_TRACED))
1286 current_sa_index = vnet_buffer (b[0])->ipsec.sad_index;
1288 if (next[0] >= ESP_DECRYPT_N_NEXT)
1289 esp_decrypt_post_crypto (vm, node, pd, pd2, b[0], next, is_ip6,
1293 if (PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_IS_TRACED))
1295 esp_decrypt_trace_t *tr;
1296 tr = vlib_add_trace (vm, node, b[0], sizeof (*tr));
1297 sa0 = pool_elt_at_index (im->sad, current_sa_index);
1298 tr->crypto_alg = sa0->crypto_alg;
1299 tr->integ_alg = sa0->integ_alg;
1301 tr->sa_seq = sa0->last_seq;
1302 tr->sa_seq_hi = sa0->seq_hi;
1313 n_left = from_frame->n_vectors;
1314 vlib_node_increment_counter (vm, node->node_index,
1315 ESP_DECRYPT_ERROR_RX_PKTS, n_left);
1317 vlib_buffer_enqueue_to_next (vm, node, from, nexts, n_left);
1323 esp_decrypt_post_inline (vlib_main_t * vm,
1324 vlib_node_runtime_t * node,
1325 vlib_frame_t * from_frame, int is_ip6, int is_tun)
1327 ipsec_main_t *im = &ipsec_main;
1328 u32 *from = vlib_frame_vector_args (from_frame);
1329 u32 n_left = from_frame->n_vectors;
1330 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
1331 u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
1332 vlib_get_buffers (vm, from, b, n_left);
1336 esp_decrypt_packet_data_t *pd = &(esp_post_data (b[0]))->decrypt_data;
1340 vlib_prefetch_buffer_header (b[2], LOAD);
1341 vlib_prefetch_buffer_header (b[1], LOAD);
1345 esp_decrypt_post_crypto (vm, node, pd, 0, b[0], next, is_ip6, is_tun,
1349 esp_decrypt_packet_data2_t *pd2 = esp_post_data2 (b[0]);
1350 esp_decrypt_post_crypto (vm, node, pd, pd2, b[0], next, is_ip6,
1355 if (PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_IS_TRACED))
1357 ipsec_sa_t *sa0 = pool_elt_at_index (im->sad, pd->sa_index);
1358 esp_decrypt_trace_t *tr;
1359 esp_decrypt_packet_data_t *async_pd =
1360 &(esp_post_data (b[0]))->decrypt_data;
1361 tr = vlib_add_trace (vm, node, b[0], sizeof (*tr));
1362 sa0 = pool_elt_at_index (im->sad, async_pd->sa_index);
1364 tr->crypto_alg = sa0->crypto_alg;
1365 tr->integ_alg = sa0->integ_alg;
1367 tr->sa_seq = sa0->last_seq;
1368 tr->sa_seq_hi = sa0->seq_hi;
1376 n_left = from_frame->n_vectors;
1377 vlib_node_increment_counter (vm, node->node_index,
1378 ESP_DECRYPT_ERROR_RX_POST_PKTS, n_left);
1380 vlib_buffer_enqueue_to_next (vm, node, from, nexts, n_left);
1385 VLIB_NODE_FN (esp4_decrypt_node) (vlib_main_t * vm,
1386 vlib_node_runtime_t * node,
1387 vlib_frame_t * from_frame)
1389 return esp_decrypt_inline (vm, node, from_frame, 0, 0,
1390 esp_decrypt_async_next.esp4_post_next);
1393 VLIB_NODE_FN (esp4_decrypt_post_node) (vlib_main_t * vm,
1394 vlib_node_runtime_t * node,
1395 vlib_frame_t * from_frame)
1397 return esp_decrypt_post_inline (vm, node, from_frame, 0, 0);
1400 VLIB_NODE_FN (esp4_decrypt_tun_node) (vlib_main_t * vm,
1401 vlib_node_runtime_t * node,
1402 vlib_frame_t * from_frame)
1404 return esp_decrypt_inline (vm, node, from_frame, 0, 1,
1405 esp_decrypt_async_next.esp4_tun_post_next);
1408 VLIB_NODE_FN (esp4_decrypt_tun_post_node) (vlib_main_t * vm,
1409 vlib_node_runtime_t * node,
1410 vlib_frame_t * from_frame)
1412 return esp_decrypt_post_inline (vm, node, from_frame, 0, 1);
1415 VLIB_NODE_FN (esp6_decrypt_node) (vlib_main_t * vm,
1416 vlib_node_runtime_t * node,
1417 vlib_frame_t * from_frame)
1419 return esp_decrypt_inline (vm, node, from_frame, 1, 0,
1420 esp_decrypt_async_next.esp6_post_next);
1423 VLIB_NODE_FN (esp6_decrypt_post_node) (vlib_main_t * vm,
1424 vlib_node_runtime_t * node,
1425 vlib_frame_t * from_frame)
1427 return esp_decrypt_post_inline (vm, node, from_frame, 1, 0);
1430 VLIB_NODE_FN (esp6_decrypt_tun_node) (vlib_main_t * vm,
1431 vlib_node_runtime_t * node,
1432 vlib_frame_t * from_frame)
1434 return esp_decrypt_inline (vm, node, from_frame, 1, 1,
1435 esp_decrypt_async_next.esp6_tun_post_next);
1438 VLIB_NODE_FN (esp6_decrypt_tun_post_node) (vlib_main_t * vm,
1439 vlib_node_runtime_t * node,
1440 vlib_frame_t * from_frame)
1442 return esp_decrypt_post_inline (vm, node, from_frame, 1, 1);
1446 VLIB_REGISTER_NODE (esp4_decrypt_node) = {
1447 .name = "esp4-decrypt",
1448 .vector_size = sizeof (u32),
1449 .format_trace = format_esp_decrypt_trace,
1450 .type = VLIB_NODE_TYPE_INTERNAL,
1452 .n_errors = ARRAY_LEN(esp_decrypt_error_strings),
1453 .error_strings = esp_decrypt_error_strings,
1455 .n_next_nodes = ESP_DECRYPT_N_NEXT,
1457 [ESP_DECRYPT_NEXT_DROP] = "ip4-drop",
1458 [ESP_DECRYPT_NEXT_IP4_INPUT] = "ip4-input-no-checksum",
1459 [ESP_DECRYPT_NEXT_IP6_INPUT] = "ip6-input",
1460 [ESP_DECRYPT_NEXT_MPLS_INPUT] = "mpls-drop",
1461 [ESP_DECRYPT_NEXT_L2_INPUT] = "l2-input",
1462 [ESP_DECRYPT_NEXT_HANDOFF] = "esp4-decrypt-handoff",
1466 VLIB_REGISTER_NODE (esp4_decrypt_post_node) = {
1467 .name = "esp4-decrypt-post",
1468 .vector_size = sizeof (u32),
1469 .format_trace = format_esp_decrypt_trace,
1470 .type = VLIB_NODE_TYPE_INTERNAL,
1472 .n_errors = ARRAY_LEN(esp_decrypt_error_strings),
1473 .error_strings = esp_decrypt_error_strings,
1475 .sibling_of = "esp4-decrypt",
1478 VLIB_REGISTER_NODE (esp6_decrypt_node) = {
1479 .name = "esp6-decrypt",
1480 .vector_size = sizeof (u32),
1481 .format_trace = format_esp_decrypt_trace,
1482 .type = VLIB_NODE_TYPE_INTERNAL,
1484 .n_errors = ARRAY_LEN(esp_decrypt_error_strings),
1485 .error_strings = esp_decrypt_error_strings,
1487 .n_next_nodes = ESP_DECRYPT_N_NEXT,
1489 [ESP_DECRYPT_NEXT_DROP] = "ip6-drop",
1490 [ESP_DECRYPT_NEXT_IP4_INPUT] = "ip4-input-no-checksum",
1491 [ESP_DECRYPT_NEXT_IP6_INPUT] = "ip6-input",
1492 [ESP_DECRYPT_NEXT_MPLS_INPUT] = "mpls-drop",
1493 [ESP_DECRYPT_NEXT_L2_INPUT] = "l2-input",
1494 [ESP_DECRYPT_NEXT_HANDOFF]= "esp6-decrypt-handoff",
1498 VLIB_REGISTER_NODE (esp6_decrypt_post_node) = {
1499 .name = "esp6-decrypt-post",
1500 .vector_size = sizeof (u32),
1501 .format_trace = format_esp_decrypt_trace,
1502 .type = VLIB_NODE_TYPE_INTERNAL,
1504 .n_errors = ARRAY_LEN(esp_decrypt_error_strings),
1505 .error_strings = esp_decrypt_error_strings,
1507 .sibling_of = "esp6-decrypt",
1510 VLIB_REGISTER_NODE (esp4_decrypt_tun_node) = {
1511 .name = "esp4-decrypt-tun",
1512 .vector_size = sizeof (u32),
1513 .format_trace = format_esp_decrypt_trace,
1514 .type = VLIB_NODE_TYPE_INTERNAL,
1515 .n_errors = ARRAY_LEN(esp_decrypt_error_strings),
1516 .error_strings = esp_decrypt_error_strings,
1517 .n_next_nodes = ESP_DECRYPT_N_NEXT,
1519 [ESP_DECRYPT_NEXT_DROP] = "ip4-drop",
1520 [ESP_DECRYPT_NEXT_IP4_INPUT] = "ip4-input-no-checksum",
1521 [ESP_DECRYPT_NEXT_IP6_INPUT] = "ip6-input",
1522 [ESP_DECRYPT_NEXT_MPLS_INPUT] = "mpls-input",
1523 [ESP_DECRYPT_NEXT_L2_INPUT] = "l2-input",
1524 [ESP_DECRYPT_NEXT_HANDOFF] = "esp4-decrypt-tun-handoff",
1528 VLIB_REGISTER_NODE (esp4_decrypt_tun_post_node) = {
1529 .name = "esp4-decrypt-tun-post",
1530 .vector_size = sizeof (u32),
1531 .format_trace = format_esp_decrypt_trace,
1532 .type = VLIB_NODE_TYPE_INTERNAL,
1534 .n_errors = ARRAY_LEN(esp_decrypt_error_strings),
1535 .error_strings = esp_decrypt_error_strings,
1537 .sibling_of = "esp4-decrypt-tun",
1540 VLIB_REGISTER_NODE (esp6_decrypt_tun_node) = {
1541 .name = "esp6-decrypt-tun",
1542 .vector_size = sizeof (u32),
1543 .format_trace = format_esp_decrypt_trace,
1544 .type = VLIB_NODE_TYPE_INTERNAL,
1545 .n_errors = ARRAY_LEN(esp_decrypt_error_strings),
1546 .error_strings = esp_decrypt_error_strings,
1547 .n_next_nodes = ESP_DECRYPT_N_NEXT,
1549 [ESP_DECRYPT_NEXT_DROP] = "ip6-drop",
1550 [ESP_DECRYPT_NEXT_IP4_INPUT] = "ip4-input-no-checksum",
1551 [ESP_DECRYPT_NEXT_IP6_INPUT] = "ip6-input",
1552 [ESP_DECRYPT_NEXT_MPLS_INPUT] = "mpls-input",
1553 [ESP_DECRYPT_NEXT_L2_INPUT] = "l2-input",
1554 [ESP_DECRYPT_NEXT_HANDOFF]= "esp6-decrypt-tun-handoff",
1558 VLIB_REGISTER_NODE (esp6_decrypt_tun_post_node) = {
1559 .name = "esp6-decrypt-tun-post",
1560 .vector_size = sizeof (u32),
1561 .format_trace = format_esp_decrypt_trace,
1562 .type = VLIB_NODE_TYPE_INTERNAL,
1564 .n_errors = ARRAY_LEN(esp_decrypt_error_strings),
1565 .error_strings = esp_decrypt_error_strings,
1567 .sibling_of = "esp6-decrypt-tun",
1572 * fd.io coding-style-patch-verification: ON
1575 * eval: (c-set-style "gnu")