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 _ (HANDOFF, "hand-off") \
65 _ (DECRYPTION_FAILED, "ESP decryption failed") \
66 _ (INTEG_ERROR, "Integrity check failed") \
67 _ (CRYPTO_ENGINE_ERROR, "crypto engine error (packet dropped)") \
68 _ (REPLAY, "SA replayed packet") \
69 _ (RUNT, "undersized packet") \
70 _ (NO_BUFFERS, "no buffers (packet dropped)") \
71 _ (OVERSIZED_HEADER, "buffer with oversized header (dropped)") \
72 _ (NO_TAIL_SPACE, "no enough buffer tail space (dropped)") \
73 _ (TUN_NO_PROTO, "no tunnel protocol") \
74 _ (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
96 ipsec_crypto_alg_t crypto_alg;
97 ipsec_integ_alg_t integ_alg;
98 } esp_decrypt_trace_t;
100 /* The number of byres in the hisequence number */
101 #define N_HI_ESN_BYTES 4
103 /* packet trace format function */
105 format_esp_decrypt_trace (u8 * s, va_list * args)
107 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
108 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
109 esp_decrypt_trace_t *t = va_arg (*args, esp_decrypt_trace_t *);
112 "esp: crypto %U integrity %U pkt-seq %d sa-seq %u sa-seq-hi %u "
114 format_ipsec_crypto_alg, t->crypto_alg, format_ipsec_integ_alg,
115 t->integ_alg, t->seq, t->sa_seq, t->sa_seq_hi, t->pkt_seq_hi);
119 #define ESP_ENCRYPT_PD_F_FD_TRANSPORT (1 << 2)
121 static_always_inline void
122 esp_process_ops (vlib_main_t * vm, vlib_node_runtime_t * node,
123 vnet_crypto_op_t * ops, vlib_buffer_t * b[], u16 * nexts,
126 vnet_crypto_op_t *op = ops;
127 u32 n_fail, n_ops = vec_len (ops);
132 n_fail = n_ops - vnet_crypto_process_ops (vm, op, n_ops);
136 ASSERT (op - ops < n_ops);
137 if (op->status != VNET_CRYPTO_OP_STATUS_COMPLETED)
139 u32 err, bi = op->user_data;
140 if (op->status == VNET_CRYPTO_OP_STATUS_FAIL_BAD_HMAC)
143 err = ESP_DECRYPT_ERROR_CRYPTO_ENGINE_ERROR;
144 b[bi]->error = node->errors[err];
145 nexts[bi] = ESP_DECRYPT_NEXT_DROP;
152 static_always_inline void
153 esp_process_chained_ops (vlib_main_t * vm, vlib_node_runtime_t * node,
154 vnet_crypto_op_t * ops, vlib_buffer_t * b[],
155 u16 * nexts, vnet_crypto_op_chunk_t * chunks, int e)
158 vnet_crypto_op_t *op = ops;
159 u32 n_fail, n_ops = vec_len (ops);
161 if (PREDICT_TRUE (n_ops == 0))
164 n_fail = n_ops - vnet_crypto_process_chained_ops (vm, op, chunks, n_ops);
168 ASSERT (op - ops < n_ops);
169 if (op->status != VNET_CRYPTO_OP_STATUS_COMPLETED)
171 u32 err, bi = op->user_data;
172 if (op->status == VNET_CRYPTO_OP_STATUS_FAIL_BAD_HMAC)
175 err = ESP_DECRYPT_ERROR_CRYPTO_ENGINE_ERROR;
176 b[bi]->error = node->errors[err];
177 nexts[bi] = ESP_DECRYPT_NEXT_DROP;
185 esp_remove_tail (vlib_main_t * vm, vlib_buffer_t * b, vlib_buffer_t * last,
188 vlib_buffer_t *before_last = b;
190 if (last->current_length > tail)
192 last->current_length -= tail;
195 ASSERT (b->flags & VLIB_BUFFER_NEXT_PRESENT);
197 while (b->flags & VLIB_BUFFER_NEXT_PRESENT)
200 b = vlib_get_buffer (vm, b->next_buffer);
202 before_last->current_length -= tail - last->current_length;
203 vlib_buffer_free_one (vm, before_last->next_buffer);
204 before_last->flags &= ~VLIB_BUFFER_NEXT_PRESENT;
207 /* ICV is splitted in last two buffers so move it to the last buffer and
208 return pointer to it */
209 static_always_inline u8 *
210 esp_move_icv (vlib_main_t * vm, vlib_buffer_t * first,
211 esp_decrypt_packet_data_t * pd,
212 esp_decrypt_packet_data2_t * pd2, u16 icv_sz, u16 * dif)
214 vlib_buffer_t *before_last, *bp;
215 u16 last_sz = pd2->lb->current_length;
216 u16 first_sz = icv_sz - last_sz;
218 bp = before_last = first;
219 while (bp->flags & VLIB_BUFFER_NEXT_PRESENT)
222 bp = vlib_get_buffer (vm, bp->next_buffer);
225 u8 *lb_curr = vlib_buffer_get_current (pd2->lb);
226 memmove (lb_curr + first_sz, lb_curr, last_sz);
227 clib_memcpy_fast (lb_curr, vlib_buffer_get_tail (before_last) - first_sz,
229 before_last->current_length -= first_sz;
230 if (before_last == first)
231 pd->current_length -= first_sz;
232 clib_memset (vlib_buffer_get_tail (before_last), 0, first_sz);
235 pd2->lb = before_last;
236 pd2->icv_removed = 1;
237 pd2->free_buffer_index = before_last->next_buffer;
238 before_last->flags &= ~VLIB_BUFFER_NEXT_PRESENT;
242 static_always_inline u16
243 esp_insert_esn (vlib_main_t *vm, ipsec_sa_t *sa, esp_decrypt_packet_data_t *pd,
244 esp_decrypt_packet_data2_t *pd2, u32 *data_len, u8 **digest,
245 u16 *len, vlib_buffer_t *b, u8 *payload)
247 if (!ipsec_sa_is_set_USE_ESN (sa))
249 /* shift ICV by 4 bytes to insert ESN */
250 u32 seq_hi = clib_host_to_net_u32 (pd->seq_hi);
251 u8 tmp[ESP_MAX_ICV_SIZE];
253 if (pd2->icv_removed)
255 u16 space_left = vlib_buffer_space_left_at_end (vm, pd2->lb);
256 if (space_left >= N_HI_ESN_BYTES)
258 clib_memcpy_fast (vlib_buffer_get_tail (pd2->lb), &seq_hi,
260 *data_len += N_HI_ESN_BYTES;
263 return N_HI_ESN_BYTES;
265 len[0] = b->current_length;
269 clib_memcpy_fast (tmp, payload + len[0], ESP_MAX_ICV_SIZE);
270 clib_memcpy_fast (payload + len[0], &seq_hi, N_HI_ESN_BYTES);
271 clib_memcpy_fast (payload + len[0] + N_HI_ESN_BYTES, tmp,
273 *data_len += N_HI_ESN_BYTES;
274 *digest += N_HI_ESN_BYTES;
276 return N_HI_ESN_BYTES;
279 static_always_inline u8 *
280 esp_move_icv_esn (vlib_main_t * vm, vlib_buffer_t * first,
281 esp_decrypt_packet_data_t * pd,
282 esp_decrypt_packet_data2_t * pd2, u16 icv_sz,
283 ipsec_sa_t * sa, u8 * extra_esn, u32 * len)
286 u8 *digest = esp_move_icv (vm, first, pd, pd2, icv_sz, &dif);
290 if (ipsec_sa_is_set_USE_ESN (sa))
292 u32 seq_hi = clib_host_to_net_u32 (pd->seq_hi);
293 u16 space_left = vlib_buffer_space_left_at_end (vm, pd2->lb);
295 if (space_left >= N_HI_ESN_BYTES)
297 clib_memcpy_fast (vlib_buffer_get_tail (pd2->lb), &seq_hi,
299 *len += N_HI_ESN_BYTES;
303 /* no space for ESN at the tail, use the next buffer
305 ASSERT (pd2->icv_removed);
306 vlib_buffer_t *tmp = vlib_get_buffer (vm, pd2->free_buffer_index);
307 clib_memcpy_fast (vlib_buffer_get_current (tmp) - N_HI_ESN_BYTES,
308 &seq_hi, N_HI_ESN_BYTES);
315 static_always_inline int
316 esp_decrypt_chain_integ (vlib_main_t *vm, ipsec_per_thread_data_t *ptd,
317 const esp_decrypt_packet_data_t *pd,
318 esp_decrypt_packet_data2_t *pd2, ipsec_sa_t *sa0,
319 vlib_buffer_t *b, u8 icv_sz, u8 *start_src,
320 u32 start_len, u8 **digest, u16 *n_ch,
321 u32 *integ_total_len)
323 vnet_crypto_op_chunk_t *ch;
324 vlib_buffer_t *cb = vlib_get_buffer (vm, b->next_buffer);
327 vec_add2 (ptd->chunks, ch, 1);
328 total_len = ch->len = start_len;
333 vec_add2 (ptd->chunks, ch, 1);
335 ch->src = vlib_buffer_get_current (cb);
338 if (pd2->icv_removed)
339 ch->len = cb->current_length;
341 ch->len = cb->current_length - icv_sz;
342 if (ipsec_sa_is_set_USE_ESN (sa0))
344 u32 seq_hi = clib_host_to_net_u32 (pd->seq_hi);
345 u8 tmp[ESP_MAX_ICV_SIZE];
347 vlib_buffer_t *tmp_b;
348 u16 space_left = vlib_buffer_space_left_at_end (vm, pd2->lb);
349 if (space_left < N_HI_ESN_BYTES)
351 if (pd2->icv_removed)
353 /* use pre-data area from the last bufer
354 that was removed from the chain */
355 tmp_b = vlib_get_buffer (vm, pd2->free_buffer_index);
356 esn = tmp_b->data - N_HI_ESN_BYTES;
360 /* no space, need to allocate new buffer */
362 if (vlib_buffer_alloc (vm, &tmp_bi, 1) != 1)
364 tmp_b = vlib_get_buffer (vm, tmp_bi);
366 pd2->free_buffer_index = tmp_bi;
368 clib_memcpy_fast (esn, &seq_hi, N_HI_ESN_BYTES);
370 vec_add2 (ptd->chunks, ch, 1);
373 ch->len = N_HI_ESN_BYTES;
377 if (pd2->icv_removed)
379 clib_memcpy_fast (vlib_buffer_get_tail (pd2->lb),
380 &seq_hi, N_HI_ESN_BYTES);
384 clib_memcpy_fast (tmp, *digest, ESP_MAX_ICV_SIZE);
385 clib_memcpy_fast (*digest, &seq_hi, N_HI_ESN_BYTES);
386 clib_memcpy_fast (*digest + N_HI_ESN_BYTES, tmp,
388 *digest += N_HI_ESN_BYTES;
390 ch->len += N_HI_ESN_BYTES;
393 total_len += ch->len;
397 total_len += ch->len = cb->current_length;
399 if (!(cb->flags & VLIB_BUFFER_NEXT_PRESENT))
402 cb = vlib_get_buffer (vm, cb->next_buffer);
408 *integ_total_len = total_len;
413 static_always_inline u32
414 esp_decrypt_chain_crypto (vlib_main_t * vm, ipsec_per_thread_data_t * ptd,
415 esp_decrypt_packet_data_t * pd,
416 esp_decrypt_packet_data2_t * pd2,
417 ipsec_sa_t * sa0, vlib_buffer_t * b, u8 icv_sz,
418 u8 * start, u32 start_len, u8 ** tag, u16 * n_ch)
420 vnet_crypto_op_chunk_t *ch;
421 vlib_buffer_t *cb = b;
424 vec_add2 (ptd->chunks, ch, 1);
425 total_len = ch->len = start_len;
426 ch->src = ch->dst = start;
427 cb = vlib_get_buffer (vm, cb->next_buffer);
432 vec_add2 (ptd->chunks, ch, 1);
434 ch->src = ch->dst = vlib_buffer_get_current (cb);
437 if (ipsec_sa_is_set_IS_AEAD (sa0))
439 if (pd2->lb->current_length < icv_sz)
442 *tag = esp_move_icv (vm, b, pd, pd2, icv_sz, &dif);
444 /* this chunk does not contain crypto data */
446 /* and fix previous chunk's length as it might have
448 ASSERT (n_chunks > 0);
456 total_len = total_len + pd2->lb->current_length -
458 ch[-1].len = pd2->lb->current_length;
463 *tag = vlib_buffer_get_tail (pd2->lb) - icv_sz;
466 if (pd2->icv_removed)
467 total_len += ch->len = cb->current_length;
469 total_len += ch->len = cb->current_length - icv_sz;
472 total_len += ch->len = cb->current_length;
474 if (!(cb->flags & VLIB_BUFFER_NEXT_PRESENT))
477 cb = vlib_get_buffer (vm, cb->next_buffer);
486 static_always_inline void
487 esp_decrypt_prepare_sync_op (vlib_main_t * vm, vlib_node_runtime_t * node,
488 ipsec_per_thread_data_t * ptd,
489 vnet_crypto_op_t *** crypto_ops,
490 vnet_crypto_op_t *** integ_ops,
491 vnet_crypto_op_t * op,
492 ipsec_sa_t * sa0, u8 * payload,
493 u16 len, u8 icv_sz, u8 iv_sz,
494 esp_decrypt_packet_data_t * pd,
495 esp_decrypt_packet_data2_t * pd2,
496 vlib_buffer_t * b, u16 * next, u32 index)
498 const u8 esp_sz = sizeof (esp_header_t);
500 if (PREDICT_TRUE (sa0->integ_op_id != VNET_CRYPTO_OP_NONE))
502 vnet_crypto_op_init (op, sa0->integ_op_id);
503 op->key_index = sa0->integ_key_index;
505 op->flags = VNET_CRYPTO_OP_FLAG_HMAC_CHECK;
506 op->user_data = index;
507 op->digest = payload + len;
508 op->digest_len = icv_sz;
513 /* buffer is chained */
514 op->len = pd->current_length;
516 /* special case when ICV is splitted and needs to be reassembled
517 * first -> move it to the last buffer. Also take into account
518 * that ESN needs to be added after encrypted data and may or
519 * may not fit in the tail.*/
520 if (pd2->lb->current_length < icv_sz)
524 esp_move_icv_esn (vm, b, pd, pd2, icv_sz, sa0,
525 &extra_esn, &op->len);
529 /* esn is in the last buffer, that was unlinked from
531 op->len = b->current_length;
537 /* we now have a single buffer of crypto data, adjust
538 * the length (second buffer contains only ICV) */
539 *integ_ops = &ptd->integ_ops;
540 *crypto_ops = &ptd->crypto_ops;
541 len = b->current_length;
547 op->digest = vlib_buffer_get_tail (pd2->lb) - icv_sz;
549 op->flags |= VNET_CRYPTO_OP_FLAG_CHAINED_BUFFERS;
550 op->chunk_index = vec_len (ptd->chunks);
551 if (esp_decrypt_chain_integ (vm, ptd, pd, pd2, sa0, b, icv_sz,
552 payload, pd->current_length,
553 &op->digest, &op->n_chunks, 0) < 0)
555 b->error = node->errors[ESP_DECRYPT_ERROR_NO_BUFFERS];
556 next[0] = ESP_DECRYPT_NEXT_DROP;
561 esp_insert_esn (vm, sa0, pd, pd2, &op->len, &op->digest, &len, b,
564 vec_add_aligned (*(integ_ops[0]), op, 1, CLIB_CACHE_LINE_BYTES);
570 if (sa0->crypto_dec_op_id != VNET_CRYPTO_OP_NONE)
572 vnet_crypto_op_init (op, sa0->crypto_dec_op_id);
573 op->key_index = sa0->crypto_key_index;
576 if (ipsec_sa_is_set_IS_CTR (sa0))
578 /* construct nonce in a scratch space in front of the IP header */
579 esp_ctr_nonce_t *nonce =
580 (esp_ctr_nonce_t *) (payload - esp_sz - pd->hdr_sz -
582 if (ipsec_sa_is_set_IS_AEAD (sa0))
584 /* constuct aad in a scratch space in front of the nonce */
585 esp_header_t *esp0 = (esp_header_t *) (payload - esp_sz);
586 op->aad = (u8 *) nonce - sizeof (esp_aead_t);
587 op->aad_len = esp_aad_fill (op->aad, esp0, sa0, pd->seq_hi);
588 op->tag = payload + len;
593 nonce->ctr = clib_host_to_net_u32 (1);
595 nonce->salt = sa0->salt;
596 ASSERT (sizeof (u64) == iv_sz);
597 nonce->iv = *(u64 *) op->iv;
598 op->iv = (u8 *) nonce;
600 op->src = op->dst = payload += iv_sz;
601 op->len = len - iv_sz;
602 op->user_data = index;
604 if (pd->is_chain && (pd2->lb != b))
606 /* buffer is chained */
607 op->flags |= VNET_CRYPTO_OP_FLAG_CHAINED_BUFFERS;
608 op->chunk_index = vec_len (ptd->chunks);
609 esp_decrypt_chain_crypto (vm, ptd, pd, pd2, sa0, b, icv_sz,
610 payload, len - pd->iv_sz + pd->icv_sz,
611 &op->tag, &op->n_chunks);
614 vec_add_aligned (*(crypto_ops[0]), op, 1, CLIB_CACHE_LINE_BYTES);
618 static_always_inline esp_decrypt_error_t
619 esp_decrypt_prepare_async_frame (vlib_main_t *vm, vlib_node_runtime_t *node,
620 ipsec_per_thread_data_t *ptd,
621 vnet_crypto_async_frame_t *f, ipsec_sa_t *sa0,
622 u8 *payload, u16 len, u8 icv_sz, u8 iv_sz,
623 esp_decrypt_packet_data_t *pd,
624 esp_decrypt_packet_data2_t *pd2, u32 bi,
625 vlib_buffer_t *b, u16 *next, u16 async_next)
627 const u8 esp_sz = sizeof (esp_header_t);
628 esp_decrypt_packet_data_t *async_pd = &(esp_post_data (b))->decrypt_data;
629 esp_decrypt_packet_data2_t *async_pd2 = esp_post_data2 (b);
630 u8 *tag = payload + len, *iv = payload + esp_sz, *aad = 0;
632 u32 crypto_len, integ_len = 0;
633 i16 crypto_start_offset, integ_start_offset = 0;
636 if (!ipsec_sa_is_set_IS_AEAD (sa0))
639 key_index = sa0->linked_key_index;
640 integ_start_offset = payload - b->data;
642 if (PREDICT_TRUE (sa0->integ_op_id != VNET_CRYPTO_OP_NONE))
643 flags |= VNET_CRYPTO_OP_FLAG_HMAC_CHECK;
647 /* buffer is chained */
648 integ_len = pd->current_length;
650 /* special case when ICV is splitted and needs to be reassembled
651 * first -> move it to the last buffer. Also take into account
652 * that ESN needs to be added after encrypted data and may or
653 * may not fit in the tail.*/
654 if (pd2->lb->current_length < icv_sz)
657 tag = esp_move_icv_esn (vm, b, pd, pd2, icv_sz, sa0,
658 &extra_esn, &integ_len);
662 /* esn is in the last buffer, that was unlinked from
664 integ_len = b->current_length;
670 /* we now have a single buffer of crypto data, adjust
671 * the length (second buffer contains only ICV) */
672 len = b->current_length;
678 tag = vlib_buffer_get_tail (pd2->lb) - icv_sz;
680 flags |= VNET_CRYPTO_OP_FLAG_CHAINED_BUFFERS;
681 if (esp_decrypt_chain_integ (vm, ptd, pd, pd2, sa0, b, icv_sz,
682 payload, pd->current_length, &tag, 0,
685 /* allocate buffer failed, will not add to frame and drop */
686 return (ESP_DECRYPT_ERROR_NO_BUFFERS);
690 esp_insert_esn (vm, sa0, pd, pd2, &integ_len, &tag, &len, b, payload);
693 key_index = sa0->crypto_key_index;
701 if (ipsec_sa_is_set_IS_CTR (sa0))
703 /* construct nonce in a scratch space in front of the IP header */
704 esp_ctr_nonce_t *nonce =
705 (esp_ctr_nonce_t *) (payload - esp_sz - pd->hdr_sz - sizeof (*nonce));
706 if (ipsec_sa_is_set_IS_AEAD (sa0))
708 /* constuct aad in a scratch space in front of the nonce */
709 esp_header_t *esp0 = (esp_header_t *) (payload - esp_sz);
710 aad = (u8 *) nonce - sizeof (esp_aead_t);
711 esp_aad_fill (aad, esp0, sa0, pd->seq_hi);
716 nonce->ctr = clib_host_to_net_u32 (1);
718 nonce->salt = sa0->salt;
719 ASSERT (sizeof (u64) == iv_sz);
720 nonce->iv = *(u64 *) iv;
724 crypto_start_offset = (payload += iv_sz) - b->data;
725 crypto_len = len - iv_sz;
727 if (pd->is_chain && (pd2->lb != b))
729 /* buffer is chained */
730 flags |= VNET_CRYPTO_OP_FLAG_CHAINED_BUFFERS;
732 crypto_len = esp_decrypt_chain_crypto (vm, ptd, pd, pd2, sa0, b, icv_sz,
734 len - pd->iv_sz + pd->icv_sz,
741 /* for AEAD integ_len - crypto_len will be negative, it is ok since it
742 * is ignored by the engine. */
743 vnet_crypto_async_add_to_frame (
744 vm, f, key_index, crypto_len, integ_len - crypto_len, crypto_start_offset,
745 integ_start_offset, bi, async_next, iv, tag, aad, flags);
747 return (ESP_DECRYPT_ERROR_RX_PKTS);
750 static_always_inline void
751 esp_decrypt_post_crypto (vlib_main_t * vm, vlib_node_runtime_t * node,
752 esp_decrypt_packet_data_t * pd,
753 esp_decrypt_packet_data2_t * pd2, vlib_buffer_t * b,
754 u16 * next, int is_ip6, int is_tun, int is_async)
756 ipsec_sa_t *sa0 = ipsec_sa_get (pd->sa_index);
757 vlib_buffer_t *lb = b;
758 const u8 esp_sz = sizeof (esp_header_t);
759 const u8 tun_flags = IPSEC_SA_FLAG_IS_TUNNEL | IPSEC_SA_FLAG_IS_TUNNEL_V6;
760 u8 pad_length = 0, next_header = 0;
764 * redo the anti-reply check
765 * in this frame say we have sequence numbers, s, s+1, s+1, s+1
766 * and s and s+1 are in the window. When we did the anti-replay
767 * check above we did so against the state of the window (W),
768 * after packet s-1. So each of the packets in the sequence will be
770 * This time s will be cheked against Ws-1, s+1 chceked against Ws
771 * (i.e. the window state is updated/advnaced)
772 * so this time the successive s+! packet will be dropped.
773 * This is a consequence of batching the decrypts. If the
774 * check-dcrypt-advance process was done for each packet it would
775 * be fine. But we batch the decrypts because it's much more efficient
776 * to do so in SW and if we offload to HW and the process is async.
778 * You're probably thinking, but this means an attacker can send the
779 * above sequence and cause VPP to perform decrpyts that will fail,
780 * and that's true. But if the attacker can determine s (a valid
781 * sequence number in the window) which is non-trivial, it can generate
782 * a sequence s, s+1, s+2, s+3, ... s+n and nothing will prevent any
783 * implementation, sequential or batching, from decrypting these.
785 if (ipsec_sa_anti_replay_and_sn_advance (sa0, pd->seq, pd->seq_hi, true,
788 b->error = node->errors[ESP_DECRYPT_ERROR_REPLAY];
789 next[0] = ESP_DECRYPT_NEXT_DROP;
793 ipsec_sa_anti_replay_advance (sa0, pd->seq, pd->seq_hi);
798 icv_sz = pd2->icv_removed ? 0 : pd->icv_sz;
799 if (pd2->free_buffer_index)
801 vlib_buffer_free_one (vm, pd2->free_buffer_index);
804 if (lb->current_length < sizeof (esp_footer_t) + icv_sz)
806 /* esp footer is either splitted in two buffers or in the before
809 vlib_buffer_t *before_last = b, *bp = b;
810 while (bp->flags & VLIB_BUFFER_NEXT_PRESENT)
813 bp = vlib_get_buffer (vm, bp->next_buffer);
815 u8 *bt = vlib_buffer_get_tail (before_last);
817 if (lb->current_length == icv_sz)
819 esp_footer_t *f = (esp_footer_t *) (bt - sizeof (*f));
820 pad_length = f->pad_length;
821 next_header = f->next_header;
825 pad_length = (bt - 1)[0];
826 next_header = ((u8 *) vlib_buffer_get_current (lb))[0];
832 (esp_footer_t *) (lb->data + lb->current_data +
833 lb->current_length - sizeof (esp_footer_t) -
835 pad_length = f->pad_length;
836 next_header = f->next_header;
843 (esp_footer_t *) (lb->data + lb->current_data + lb->current_length -
844 sizeof (esp_footer_t) - icv_sz);
845 pad_length = f->pad_length;
846 next_header = f->next_header;
849 u16 adv = pd->iv_sz + esp_sz;
850 u16 tail = sizeof (esp_footer_t) + pad_length + icv_sz;
851 u16 tail_orig = sizeof (esp_footer_t) + pad_length + pd->icv_sz;
852 b->flags &= ~VLIB_BUFFER_TOTAL_LENGTH_VALID;
854 if ((pd->flags & tun_flags) == 0 && !is_tun) /* transport mode */
856 u8 udp_sz = (is_ip6 == 0 && pd->flags & IPSEC_SA_FLAG_UDP_ENCAP) ?
857 sizeof (udp_header_t) : 0;
858 u16 ip_hdr_sz = pd->hdr_sz - udp_sz;
859 u8 *old_ip = b->data + pd->current_data - ip_hdr_sz - udp_sz;
860 u8 *ip = old_ip + adv + udp_sz;
862 if (is_ip6 && ip_hdr_sz > 64)
863 memmove (ip, old_ip, ip_hdr_sz);
865 clib_memcpy_le64 (ip, old_ip, ip_hdr_sz);
867 b->current_data = pd->current_data + adv - ip_hdr_sz;
868 b->current_length += ip_hdr_sz - adv;
869 esp_remove_tail (vm, b, lb, tail);
873 ip6_header_t *ip6 = (ip6_header_t *) ip;
874 u16 len = clib_net_to_host_u16 (ip6->payload_length);
875 len -= adv + tail_orig;
876 ip6->payload_length = clib_host_to_net_u16 (len);
877 ip6->protocol = next_header;
878 next[0] = ESP_DECRYPT_NEXT_IP6_INPUT;
882 ip4_header_t *ip4 = (ip4_header_t *) ip;
883 ip_csum_t sum = ip4->checksum;
884 u16 len = clib_net_to_host_u16 (ip4->length);
885 len = clib_host_to_net_u16 (len - adv - tail_orig - udp_sz);
886 sum = ip_csum_update (sum, ip4->protocol, next_header,
887 ip4_header_t, protocol);
888 sum = ip_csum_update (sum, ip4->length, len, ip4_header_t, length);
889 ip4->checksum = ip_csum_fold (sum);
890 ip4->protocol = next_header;
892 next[0] = ESP_DECRYPT_NEXT_IP4_INPUT;
897 if (PREDICT_TRUE (next_header == IP_PROTOCOL_IP_IN_IP))
899 next[0] = ESP_DECRYPT_NEXT_IP4_INPUT;
900 b->current_data = pd->current_data + adv;
901 b->current_length = pd->current_length - adv;
902 esp_remove_tail (vm, b, lb, tail);
904 else if (next_header == IP_PROTOCOL_IPV6)
906 next[0] = ESP_DECRYPT_NEXT_IP6_INPUT;
907 b->current_data = pd->current_data + adv;
908 b->current_length = pd->current_length - adv;
909 esp_remove_tail (vm, b, lb, tail);
911 else if (next_header == IP_PROTOCOL_MPLS_IN_IP)
913 next[0] = ESP_DECRYPT_NEXT_MPLS_INPUT;
914 b->current_data = pd->current_data + adv;
915 b->current_length = pd->current_length - adv;
916 esp_remove_tail (vm, b, lb, tail);
920 if (is_tun && next_header == IP_PROTOCOL_GRE)
924 b->current_data = pd->current_data + adv;
925 b->current_length = pd->current_length - adv - tail;
927 gre = vlib_buffer_get_current (b);
929 vlib_buffer_advance (b, sizeof (*gre));
931 switch (clib_net_to_host_u16 (gre->protocol))
933 case GRE_PROTOCOL_teb:
934 vnet_update_l2_len (b);
935 next[0] = ESP_DECRYPT_NEXT_L2_INPUT;
937 case GRE_PROTOCOL_ip4:
938 next[0] = ESP_DECRYPT_NEXT_IP4_INPUT;
940 case GRE_PROTOCOL_ip6:
941 next[0] = ESP_DECRYPT_NEXT_IP6_INPUT;
944 b->error = node->errors[ESP_DECRYPT_ERROR_UNSUP_PAYLOAD];
945 next[0] = ESP_DECRYPT_NEXT_DROP;
951 next[0] = ESP_DECRYPT_NEXT_DROP;
952 b->error = node->errors[ESP_DECRYPT_ERROR_UNSUP_PAYLOAD];
958 if (ipsec_sa_is_set_IS_PROTECT (sa0))
961 * There are two encap possibilities
962 * 1) the tunnel and ths SA are prodiving encap, i.e. it's
963 * MAC | SA-IP | TUN-IP | ESP | PAYLOAD
964 * implying the SA is in tunnel mode (on a tunnel interface)
965 * 2) only the tunnel provides encap
966 * MAC | TUN-IP | ESP | PAYLOAD
967 * implying the SA is in transport mode.
969 * For 2) we need only strip the tunnel encap and we're good.
970 * since the tunnel and crypto ecnap (int the tun=protect
971 * object) are the same and we verified above that these match
972 * for 1) we need to strip the SA-IP outer headers, to
973 * reveal the tunnel IP and then check that this matches
974 * the configured tunnel.
976 const ipsec_tun_protect_t *itp;
979 ipsec_tun_protect_get (vnet_buffer (b)->ipsec.protect_index);
981 if (PREDICT_TRUE (next_header == IP_PROTOCOL_IP_IN_IP))
983 const ip4_header_t *ip4;
985 ip4 = vlib_buffer_get_current (b);
987 if (!ip46_address_is_equal_v4 (&itp->itp_tun.src,
988 &ip4->dst_address) ||
989 !ip46_address_is_equal_v4 (&itp->itp_tun.dst,
992 next[0] = ESP_DECRYPT_NEXT_DROP;
993 b->error = node->errors[ESP_DECRYPT_ERROR_TUN_NO_PROTO];
996 else if (next_header == IP_PROTOCOL_IPV6)
998 const ip6_header_t *ip6;
1000 ip6 = vlib_buffer_get_current (b);
1002 if (!ip46_address_is_equal_v6 (&itp->itp_tun.src,
1003 &ip6->dst_address) ||
1004 !ip46_address_is_equal_v6 (&itp->itp_tun.dst,
1007 next[0] = ESP_DECRYPT_NEXT_DROP;
1008 b->error = node->errors[ESP_DECRYPT_ERROR_TUN_NO_PROTO];
1017 esp_decrypt_inline (vlib_main_t *vm, vlib_node_runtime_t *node,
1018 vlib_frame_t *from_frame, int is_ip6, int is_tun,
1019 u16 async_next_node)
1021 ipsec_main_t *im = &ipsec_main;
1022 u32 thread_index = vm->thread_index;
1024 ipsec_per_thread_data_t *ptd = vec_elt_at_index (im->ptd, thread_index);
1025 u32 *from = vlib_frame_vector_args (from_frame);
1026 u32 n_left = from_frame->n_vectors;
1027 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
1028 vlib_buffer_t *sync_bufs[VLIB_FRAME_SIZE];
1029 u16 sync_nexts[VLIB_FRAME_SIZE], *sync_next = sync_nexts, n_sync = 0;
1030 u16 async_nexts[VLIB_FRAME_SIZE], *async_next = async_nexts;
1031 u16 noop_nexts[VLIB_FRAME_SIZE], *noop_next = noop_nexts, n_noop = 0;
1032 u32 sync_bi[VLIB_FRAME_SIZE];
1033 u32 noop_bi[VLIB_FRAME_SIZE];
1034 esp_decrypt_packet_data_t pkt_data[VLIB_FRAME_SIZE], *pd = pkt_data;
1035 esp_decrypt_packet_data2_t pkt_data2[VLIB_FRAME_SIZE], *pd2 = pkt_data2;
1036 esp_decrypt_packet_data_t cpd = { };
1037 u32 current_sa_index = ~0, current_sa_bytes = 0, current_sa_pkts = 0;
1038 const u8 esp_sz = sizeof (esp_header_t);
1039 ipsec_sa_t *sa0 = 0;
1040 vnet_crypto_op_t _op, *op = &_op;
1041 vnet_crypto_op_t **crypto_ops;
1042 vnet_crypto_op_t **integ_ops;
1043 int is_async = im->async_mode;
1044 vnet_crypto_async_op_id_t async_op = ~0;
1045 vnet_crypto_async_frame_t *async_frames[VNET_CRYPTO_ASYNC_OP_N_IDS];
1046 esp_decrypt_error_t err;
1048 vlib_get_buffers (vm, from, b, n_left);
1051 vec_reset_length (ptd->crypto_ops);
1052 vec_reset_length (ptd->integ_ops);
1053 vec_reset_length (ptd->chained_crypto_ops);
1054 vec_reset_length (ptd->chained_integ_ops);
1056 vec_reset_length (ptd->async_frames);
1057 vec_reset_length (ptd->chunks);
1058 clib_memset (sync_nexts, -1, sizeof (sync_nexts));
1059 clib_memset (async_frames, 0, sizeof (async_frames));
1065 err = ESP_DECRYPT_ERROR_RX_PKTS;
1069 vlib_prefetch_buffer_header (b[2], LOAD);
1070 p = vlib_buffer_get_current (b[1]);
1071 CLIB_PREFETCH (p, CLIB_CACHE_LINE_BYTES, LOAD);
1072 p -= CLIB_CACHE_LINE_BYTES;
1073 CLIB_PREFETCH (p, CLIB_CACHE_LINE_BYTES, LOAD);
1076 u32 n_bufs = vlib_buffer_chain_linearize (vm, b[0]);
1079 err = ESP_DECRYPT_ERROR_NO_BUFFERS;
1080 esp_set_next_index (b[0], node, err, n_noop, noop_nexts,
1081 ESP_DECRYPT_NEXT_DROP);
1085 if (vnet_buffer (b[0])->ipsec.sad_index != current_sa_index)
1087 if (current_sa_pkts)
1088 vlib_increment_combined_counter (&ipsec_sa_counters, thread_index,
1092 current_sa_bytes = current_sa_pkts = 0;
1094 current_sa_index = vnet_buffer (b[0])->ipsec.sad_index;
1095 sa0 = ipsec_sa_get (current_sa_index);
1097 /* fetch the second cacheline ASAP */
1098 CLIB_PREFETCH (sa0->cacheline1, CLIB_CACHE_LINE_BYTES, LOAD);
1099 cpd.icv_sz = sa0->integ_icv_size;
1100 cpd.iv_sz = sa0->crypto_iv_size;
1101 cpd.flags = sa0->flags;
1102 cpd.sa_index = current_sa_index;
1103 is_async = im->async_mode | ipsec_sa_is_set_IS_ASYNC (sa0);
1106 if (PREDICT_FALSE (~0 == sa0->thread_index))
1108 /* this is the first packet to use this SA, claim the SA
1109 * for this thread. this could happen simultaneously on
1111 clib_atomic_cmp_and_swap (&sa0->thread_index, ~0,
1112 ipsec_sa_assign_thread (thread_index));
1115 if (PREDICT_FALSE (thread_index != sa0->thread_index))
1117 vnet_buffer (b[0])->ipsec.thread_index = sa0->thread_index;
1118 err = ESP_DECRYPT_ERROR_HANDOFF;
1119 esp_set_next_index (b[0], node, err, n_noop, noop_nexts,
1120 ESP_DECRYPT_NEXT_HANDOFF);
1124 /* store packet data for next round for easier prefetch */
1125 pd->sa_data = cpd.sa_data;
1126 pd->current_data = b[0]->current_data;
1127 pd->hdr_sz = pd->current_data - vnet_buffer (b[0])->l3_hdr_offset;
1128 payload = b[0]->data + pd->current_data;
1129 pd->seq = clib_host_to_net_u32 (((esp_header_t *) payload)->seq);
1132 pd2->free_buffer_index = 0;
1133 pd2->icv_removed = 0;
1138 /* find last buffer in the chain */
1139 while (pd2->lb->flags & VLIB_BUFFER_NEXT_PRESENT)
1140 pd2->lb = vlib_get_buffer (vm, pd2->lb->next_buffer);
1142 crypto_ops = &ptd->chained_crypto_ops;
1143 integ_ops = &ptd->chained_integ_ops;
1147 crypto_ops = &ptd->crypto_ops;
1148 integ_ops = &ptd->integ_ops;
1151 pd->current_length = b[0]->current_length;
1153 /* anti-reply check */
1154 if (ipsec_sa_anti_replay_and_sn_advance (sa0, pd->seq, ~0, false,
1157 err = ESP_DECRYPT_ERROR_REPLAY;
1158 esp_set_next_index (b[0], node, err, n_noop, noop_nexts,
1159 ESP_DECRYPT_NEXT_DROP);
1163 if (pd->current_length < cpd.icv_sz + esp_sz + cpd.iv_sz)
1165 err = ESP_DECRYPT_ERROR_RUNT;
1166 esp_set_next_index (b[0], node, err, n_noop, noop_nexts,
1167 ESP_DECRYPT_NEXT_DROP);
1171 len = pd->current_length - cpd.icv_sz;
1172 current_sa_pkts += 1;
1173 current_sa_bytes += vlib_buffer_length_in_chain (vm, b[0]);
1177 async_op = sa0->crypto_async_dec_op_id;
1179 /* get a frame for this op if we don't yet have one or it's full
1181 if (NULL == async_frames[async_op] ||
1182 vnet_crypto_async_frame_is_full (async_frames[async_op]))
1184 async_frames[async_op] =
1185 vnet_crypto_async_get_frame (vm, async_op);
1186 /* Save the frame to the list we'll submit at the end */
1187 vec_add1 (ptd->async_frames, async_frames[async_op]);
1190 err = esp_decrypt_prepare_async_frame (
1191 vm, node, ptd, async_frames[async_op], sa0, payload, len,
1192 cpd.icv_sz, cpd.iv_sz, pd, pd2, from[b - bufs], b[0], async_next,
1194 if (ESP_DECRYPT_ERROR_RX_PKTS != err)
1196 esp_set_next_index (b[0], node, err, n_noop, noop_nexts,
1197 ESP_DECRYPT_NEXT_DROP);
1201 esp_decrypt_prepare_sync_op (
1202 vm, node, ptd, &crypto_ops, &integ_ops, op, sa0, payload, len,
1203 cpd.icv_sz, cpd.iv_sz, pd, pd2, b[0], sync_next, b - bufs);
1206 if (ESP_DECRYPT_ERROR_RX_PKTS != err)
1208 noop_bi[n_noop] = from[b - bufs];
1214 sync_bi[n_sync] = from[b - bufs];
1215 sync_bufs[n_sync] = b[0];
1228 if (PREDICT_TRUE (~0 != current_sa_index))
1229 vlib_increment_combined_counter (&ipsec_sa_counters, thread_index,
1230 current_sa_index, current_sa_pkts,
1233 /* submit or free all of the open frames */
1234 vnet_crypto_async_frame_t **async_frame;
1236 vec_foreach (async_frame, ptd->async_frames)
1238 /* free frame and move on if no ops were successfully added */
1239 if (PREDICT_FALSE (!(*async_frame)->n_elts))
1241 vnet_crypto_async_free_frame (vm, *async_frame);
1244 if (vnet_crypto_async_submit_open_frame (vm, *async_frame) < 0)
1246 n_noop += esp_async_recycle_failed_submit (
1247 vm, *async_frame, node, ESP_DECRYPT_ERROR_CRYPTO_ENGINE_ERROR,
1248 n_sync, noop_bi, noop_nexts, ESP_DECRYPT_NEXT_DROP);
1249 vnet_crypto_async_reset_frame (*async_frame);
1250 vnet_crypto_async_free_frame (vm, *async_frame);
1256 esp_process_ops (vm, node, ptd->integ_ops, sync_bufs, sync_nexts,
1257 ESP_DECRYPT_ERROR_INTEG_ERROR);
1258 esp_process_chained_ops (vm, node, ptd->chained_integ_ops, sync_bufs,
1259 sync_nexts, ptd->chunks,
1260 ESP_DECRYPT_ERROR_INTEG_ERROR);
1262 esp_process_ops (vm, node, ptd->crypto_ops, sync_bufs, sync_nexts,
1263 ESP_DECRYPT_ERROR_DECRYPTION_FAILED);
1264 esp_process_chained_ops (vm, node, ptd->chained_crypto_ops, sync_bufs,
1265 sync_nexts, ptd->chunks,
1266 ESP_DECRYPT_ERROR_DECRYPTION_FAILED);
1269 /* Post decryption ronud - adjust packet data start and length and next
1273 sync_next = sync_nexts;
1282 void *data = b[1]->data + pd[1].current_data;
1284 /* buffer metadata */
1285 vlib_prefetch_buffer_header (b[1], LOAD);
1288 CLIB_PREFETCH (data + pd[1].current_length - pd[1].icv_sz - 2,
1289 CLIB_CACHE_LINE_BYTES, LOAD);
1291 /* packet headers */
1292 CLIB_PREFETCH (data - CLIB_CACHE_LINE_BYTES,
1293 CLIB_CACHE_LINE_BYTES * 2, LOAD);
1296 /* save the sa_index as GRE_teb post_crypto changes L2 opaque */
1297 if (PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_IS_TRACED))
1298 current_sa_index = vnet_buffer (b[0])->ipsec.sad_index;
1300 if (sync_next[0] >= ESP_DECRYPT_N_NEXT)
1301 esp_decrypt_post_crypto (vm, node, pd, pd2, b[0], sync_next, is_ip6,
1305 if (PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_IS_TRACED))
1307 esp_decrypt_trace_t *tr;
1308 tr = vlib_add_trace (vm, node, b[0], sizeof (*tr));
1309 sa0 = ipsec_sa_get (current_sa_index);
1310 tr->crypto_alg = sa0->crypto_alg;
1311 tr->integ_alg = sa0->integ_alg;
1313 tr->sa_seq = sa0->seq;
1314 tr->sa_seq_hi = sa0->seq_hi;
1315 tr->pkt_seq_hi = pd->seq_hi;
1326 vlib_node_increment_counter (vm, node->node_index, ESP_DECRYPT_ERROR_RX_PKTS,
1327 from_frame->n_vectors);
1330 vlib_buffer_enqueue_to_next (vm, node, sync_bi, sync_nexts, n_sync);
1333 vlib_buffer_enqueue_to_next (vm, node, noop_bi, noop_nexts, n_noop);
1335 return (from_frame->n_vectors);
1339 esp_decrypt_post_inline (vlib_main_t * vm,
1340 vlib_node_runtime_t * node,
1341 vlib_frame_t * from_frame, int is_ip6, int is_tun)
1343 u32 *from = vlib_frame_vector_args (from_frame);
1344 u32 n_left = from_frame->n_vectors;
1345 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
1346 u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
1347 vlib_get_buffers (vm, from, b, n_left);
1351 esp_decrypt_packet_data_t *pd = &(esp_post_data (b[0]))->decrypt_data;
1355 vlib_prefetch_buffer_header (b[2], LOAD);
1356 vlib_prefetch_buffer_header (b[1], LOAD);
1360 esp_decrypt_post_crypto (vm, node, pd, 0, b[0], next, is_ip6, is_tun,
1364 esp_decrypt_packet_data2_t *pd2 = esp_post_data2 (b[0]);
1365 esp_decrypt_post_crypto (vm, node, pd, pd2, b[0], next, is_ip6,
1370 if (PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_IS_TRACED))
1372 ipsec_sa_t *sa0 = ipsec_sa_get (pd->sa_index);
1373 esp_decrypt_trace_t *tr;
1374 esp_decrypt_packet_data_t *async_pd =
1375 &(esp_post_data (b[0]))->decrypt_data;
1376 tr = vlib_add_trace (vm, node, b[0], sizeof (*tr));
1377 sa0 = ipsec_sa_get (async_pd->sa_index);
1379 tr->crypto_alg = sa0->crypto_alg;
1380 tr->integ_alg = sa0->integ_alg;
1382 tr->sa_seq = sa0->seq;
1383 tr->sa_seq_hi = sa0->seq_hi;
1391 n_left = from_frame->n_vectors;
1392 vlib_node_increment_counter (vm, node->node_index,
1393 ESP_DECRYPT_ERROR_RX_POST_PKTS, n_left);
1395 vlib_buffer_enqueue_to_next (vm, node, from, nexts, n_left);
1400 VLIB_NODE_FN (esp4_decrypt_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, 0,
1405 esp_decrypt_async_next.esp4_post_next);
1408 VLIB_NODE_FN (esp4_decrypt_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, 0);
1415 VLIB_NODE_FN (esp4_decrypt_tun_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, 0, 1,
1420 esp_decrypt_async_next.esp4_tun_post_next);
1423 VLIB_NODE_FN (esp4_decrypt_tun_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, 0, 1);
1430 VLIB_NODE_FN (esp6_decrypt_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, 0,
1435 esp_decrypt_async_next.esp6_post_next);
1438 VLIB_NODE_FN (esp6_decrypt_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, 0);
1445 VLIB_NODE_FN (esp6_decrypt_tun_node) (vlib_main_t * vm,
1446 vlib_node_runtime_t * node,
1447 vlib_frame_t * from_frame)
1449 return esp_decrypt_inline (vm, node, from_frame, 1, 1,
1450 esp_decrypt_async_next.esp6_tun_post_next);
1453 VLIB_NODE_FN (esp6_decrypt_tun_post_node) (vlib_main_t * vm,
1454 vlib_node_runtime_t * node,
1455 vlib_frame_t * from_frame)
1457 return esp_decrypt_post_inline (vm, node, from_frame, 1, 1);
1461 VLIB_REGISTER_NODE (esp4_decrypt_node) = {
1462 .name = "esp4-decrypt",
1463 .vector_size = sizeof (u32),
1464 .format_trace = format_esp_decrypt_trace,
1465 .type = VLIB_NODE_TYPE_INTERNAL,
1467 .n_errors = ARRAY_LEN(esp_decrypt_error_strings),
1468 .error_strings = esp_decrypt_error_strings,
1470 .n_next_nodes = ESP_DECRYPT_N_NEXT,
1472 [ESP_DECRYPT_NEXT_DROP] = "ip4-drop",
1473 [ESP_DECRYPT_NEXT_IP4_INPUT] = "ip4-input-no-checksum",
1474 [ESP_DECRYPT_NEXT_IP6_INPUT] = "ip6-input",
1475 [ESP_DECRYPT_NEXT_MPLS_INPUT] = "mpls-drop",
1476 [ESP_DECRYPT_NEXT_L2_INPUT] = "l2-input",
1477 [ESP_DECRYPT_NEXT_HANDOFF] = "esp4-decrypt-handoff",
1481 VLIB_REGISTER_NODE (esp4_decrypt_post_node) = {
1482 .name = "esp4-decrypt-post",
1483 .vector_size = sizeof (u32),
1484 .format_trace = format_esp_decrypt_trace,
1485 .type = VLIB_NODE_TYPE_INTERNAL,
1487 .n_errors = ARRAY_LEN(esp_decrypt_error_strings),
1488 .error_strings = esp_decrypt_error_strings,
1490 .sibling_of = "esp4-decrypt",
1493 VLIB_REGISTER_NODE (esp6_decrypt_node) = {
1494 .name = "esp6-decrypt",
1495 .vector_size = sizeof (u32),
1496 .format_trace = format_esp_decrypt_trace,
1497 .type = VLIB_NODE_TYPE_INTERNAL,
1499 .n_errors = ARRAY_LEN(esp_decrypt_error_strings),
1500 .error_strings = esp_decrypt_error_strings,
1502 .n_next_nodes = ESP_DECRYPT_N_NEXT,
1504 [ESP_DECRYPT_NEXT_DROP] = "ip6-drop",
1505 [ESP_DECRYPT_NEXT_IP4_INPUT] = "ip4-input-no-checksum",
1506 [ESP_DECRYPT_NEXT_IP6_INPUT] = "ip6-input",
1507 [ESP_DECRYPT_NEXT_MPLS_INPUT] = "mpls-drop",
1508 [ESP_DECRYPT_NEXT_L2_INPUT] = "l2-input",
1509 [ESP_DECRYPT_NEXT_HANDOFF]= "esp6-decrypt-handoff",
1513 VLIB_REGISTER_NODE (esp6_decrypt_post_node) = {
1514 .name = "esp6-decrypt-post",
1515 .vector_size = sizeof (u32),
1516 .format_trace = format_esp_decrypt_trace,
1517 .type = VLIB_NODE_TYPE_INTERNAL,
1519 .n_errors = ARRAY_LEN(esp_decrypt_error_strings),
1520 .error_strings = esp_decrypt_error_strings,
1522 .sibling_of = "esp6-decrypt",
1525 VLIB_REGISTER_NODE (esp4_decrypt_tun_node) = {
1526 .name = "esp4-decrypt-tun",
1527 .vector_size = sizeof (u32),
1528 .format_trace = format_esp_decrypt_trace,
1529 .type = VLIB_NODE_TYPE_INTERNAL,
1530 .n_errors = ARRAY_LEN(esp_decrypt_error_strings),
1531 .error_strings = esp_decrypt_error_strings,
1532 .n_next_nodes = ESP_DECRYPT_N_NEXT,
1534 [ESP_DECRYPT_NEXT_DROP] = "ip4-drop",
1535 [ESP_DECRYPT_NEXT_IP4_INPUT] = "ip4-input-no-checksum",
1536 [ESP_DECRYPT_NEXT_IP6_INPUT] = "ip6-input",
1537 [ESP_DECRYPT_NEXT_MPLS_INPUT] = "mpls-input",
1538 [ESP_DECRYPT_NEXT_L2_INPUT] = "l2-input",
1539 [ESP_DECRYPT_NEXT_HANDOFF] = "esp4-decrypt-tun-handoff",
1543 VLIB_REGISTER_NODE (esp4_decrypt_tun_post_node) = {
1544 .name = "esp4-decrypt-tun-post",
1545 .vector_size = sizeof (u32),
1546 .format_trace = format_esp_decrypt_trace,
1547 .type = VLIB_NODE_TYPE_INTERNAL,
1549 .n_errors = ARRAY_LEN(esp_decrypt_error_strings),
1550 .error_strings = esp_decrypt_error_strings,
1552 .sibling_of = "esp4-decrypt-tun",
1555 VLIB_REGISTER_NODE (esp6_decrypt_tun_node) = {
1556 .name = "esp6-decrypt-tun",
1557 .vector_size = sizeof (u32),
1558 .format_trace = format_esp_decrypt_trace,
1559 .type = VLIB_NODE_TYPE_INTERNAL,
1560 .n_errors = ARRAY_LEN(esp_decrypt_error_strings),
1561 .error_strings = esp_decrypt_error_strings,
1562 .n_next_nodes = ESP_DECRYPT_N_NEXT,
1564 [ESP_DECRYPT_NEXT_DROP] = "ip6-drop",
1565 [ESP_DECRYPT_NEXT_IP4_INPUT] = "ip4-input-no-checksum",
1566 [ESP_DECRYPT_NEXT_IP6_INPUT] = "ip6-input",
1567 [ESP_DECRYPT_NEXT_MPLS_INPUT] = "mpls-input",
1568 [ESP_DECRYPT_NEXT_L2_INPUT] = "l2-input",
1569 [ESP_DECRYPT_NEXT_HANDOFF]= "esp6-decrypt-tun-handoff",
1573 VLIB_REGISTER_NODE (esp6_decrypt_tun_post_node) = {
1574 .name = "esp6-decrypt-tun-post",
1575 .vector_size = sizeof (u32),
1576 .format_trace = format_esp_decrypt_trace,
1577 .type = VLIB_NODE_TYPE_INTERNAL,
1579 .n_errors = ARRAY_LEN(esp_decrypt_error_strings),
1580 .error_strings = esp_decrypt_error_strings,
1582 .sibling_of = "esp6-decrypt-tun",
1586 #ifndef CLIB_MARCH_VARIANT
1588 static clib_error_t *
1589 esp_decrypt_init (vlib_main_t *vm)
1591 ipsec_main_t *im = &ipsec_main;
1593 im->esp4_dec_fq_index =
1594 vlib_frame_queue_main_init (esp4_decrypt_node.index, 0);
1595 im->esp6_dec_fq_index =
1596 vlib_frame_queue_main_init (esp6_decrypt_node.index, 0);
1597 im->esp4_dec_tun_fq_index =
1598 vlib_frame_queue_main_init (esp4_decrypt_tun_node.index, 0);
1599 im->esp6_dec_tun_fq_index =
1600 vlib_frame_queue_main_init (esp6_decrypt_tun_node.index, 0);
1605 VLIB_INIT_FUNCTION (esp_decrypt_init);
1610 * fd.io coding-style-patch-verification: ON
1613 * eval: (c-set-style "gnu")