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.
17 #include <vnet/vnet.h>
18 #include <vnet/api_errno.h>
19 #include <vnet/ip/ip.h>
20 #include <vnet/l2/l2_input.h>
22 #include <vnet/ipsec/ipsec.h>
23 #include <vnet/ipsec/esp.h>
24 #include <vnet/ipsec/ipsec_io.h>
25 #include <vnet/ipsec/ipsec_tun.h>
27 #include <vnet/gre/packet.h>
29 #define foreach_esp_decrypt_next \
30 _ (DROP, "error-drop") \
31 _ (IP4_INPUT, "ip4-input-no-checksum") \
32 _ (IP6_INPUT, "ip6-input") \
33 _ (L2_INPUT, "l2-input") \
34 _ (MPLS_INPUT, "mpls-input") \
35 _ (HANDOFF, "handoff")
37 #define _(v, s) ESP_DECRYPT_NEXT_##v,
40 foreach_esp_decrypt_next
45 #define foreach_esp_decrypt_post_next \
46 _ (DROP, "error-drop") \
47 _ (IP4_INPUT, "ip4-input-no-checksum") \
48 _ (IP6_INPUT, "ip6-input") \
49 _ (MPLS_INPUT, "mpls-input") \
50 _ (L2_INPUT, "l2-input")
52 #define _(v, s) ESP_DECRYPT_POST_NEXT_##v,
55 foreach_esp_decrypt_post_next
57 ESP_DECRYPT_POST_N_NEXT,
58 } esp_decrypt_post_next_t;
60 #define foreach_esp_decrypt_error \
61 _ (RX_PKTS, "ESP pkts received") \
62 _ (RX_POST_PKTS, "ESP-POST pkts received") \
63 _ (HANDOFF, "hand-off") \
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")
77 #define _(sym,str) ESP_DECRYPT_ERROR_##sym,
78 foreach_esp_decrypt_error
81 } esp_decrypt_error_t;
83 static char *esp_decrypt_error_strings[] = {
84 #define _(sym,string) string,
85 foreach_esp_decrypt_error
95 ipsec_crypto_alg_t crypto_alg;
96 ipsec_integ_alg_t integ_alg;
97 } esp_decrypt_trace_t;
99 /* The number of byres in the hisequence number */
100 #define N_HI_ESN_BYTES 4
102 /* packet trace format function */
104 format_esp_decrypt_trace (u8 * s, va_list * args)
106 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
107 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
108 esp_decrypt_trace_t *t = va_arg (*args, esp_decrypt_trace_t *);
111 "esp: crypto %U integrity %U pkt-seq %d sa-seq %u sa-seq-hi %u "
113 format_ipsec_crypto_alg, t->crypto_alg, format_ipsec_integ_alg,
114 t->integ_alg, t->seq, t->sa_seq, t->sa_seq_hi, t->pkt_seq_hi);
118 #define ESP_ENCRYPT_PD_F_FD_TRANSPORT (1 << 2)
120 static_always_inline void
121 esp_process_ops (vlib_main_t * vm, vlib_node_runtime_t * node,
122 vnet_crypto_op_t * ops, vlib_buffer_t * b[], u16 * nexts,
125 vnet_crypto_op_t *op = ops;
126 u32 n_fail, n_ops = vec_len (ops);
131 n_fail = n_ops - vnet_crypto_process_ops (vm, op, n_ops);
135 ASSERT (op - ops < n_ops);
136 if (op->status != VNET_CRYPTO_OP_STATUS_COMPLETED)
138 u32 err, bi = op->user_data;
139 if (op->status == VNET_CRYPTO_OP_STATUS_FAIL_BAD_HMAC)
142 err = ESP_DECRYPT_ERROR_CRYPTO_ENGINE_ERROR;
143 b[bi]->error = node->errors[err];
144 nexts[bi] = ESP_DECRYPT_NEXT_DROP;
151 static_always_inline void
152 esp_process_chained_ops (vlib_main_t * vm, vlib_node_runtime_t * node,
153 vnet_crypto_op_t * ops, vlib_buffer_t * b[],
154 u16 * nexts, vnet_crypto_op_chunk_t * chunks, int e)
157 vnet_crypto_op_t *op = ops;
158 u32 n_fail, n_ops = vec_len (ops);
160 if (PREDICT_TRUE (n_ops == 0))
163 n_fail = n_ops - vnet_crypto_process_chained_ops (vm, op, chunks, n_ops);
167 ASSERT (op - ops < n_ops);
168 if (op->status != VNET_CRYPTO_OP_STATUS_COMPLETED)
170 u32 err, bi = op->user_data;
171 if (op->status == VNET_CRYPTO_OP_STATUS_FAIL_BAD_HMAC)
174 err = ESP_DECRYPT_ERROR_CRYPTO_ENGINE_ERROR;
175 b[bi]->error = node->errors[err];
176 nexts[bi] = ESP_DECRYPT_NEXT_DROP;
184 esp_remove_tail (vlib_main_t * vm, vlib_buffer_t * b, vlib_buffer_t * last,
187 vlib_buffer_t *before_last = b;
189 if (last->current_length > tail)
191 last->current_length -= tail;
194 ASSERT (b->flags & VLIB_BUFFER_NEXT_PRESENT);
196 while (b->flags & VLIB_BUFFER_NEXT_PRESENT)
199 b = vlib_get_buffer (vm, b->next_buffer);
201 before_last->current_length -= tail - last->current_length;
202 vlib_buffer_free_one (vm, before_last->next_buffer);
203 before_last->flags &= ~VLIB_BUFFER_NEXT_PRESENT;
206 /* ICV is splitted in last two buffers so move it to the last buffer and
207 return pointer to it */
208 static_always_inline u8 *
209 esp_move_icv (vlib_main_t * vm, vlib_buffer_t * first,
210 esp_decrypt_packet_data_t * pd,
211 esp_decrypt_packet_data2_t * pd2, u16 icv_sz, u16 * dif)
213 vlib_buffer_t *before_last, *bp;
214 u16 last_sz = pd2->lb->current_length;
215 u16 first_sz = icv_sz - last_sz;
217 bp = before_last = first;
218 while (bp->flags & VLIB_BUFFER_NEXT_PRESENT)
221 bp = vlib_get_buffer (vm, bp->next_buffer);
224 u8 *lb_curr = vlib_buffer_get_current (pd2->lb);
225 memmove (lb_curr + first_sz, lb_curr, last_sz);
226 clib_memcpy_fast (lb_curr, vlib_buffer_get_tail (before_last) - first_sz,
228 before_last->current_length -= first_sz;
229 if (before_last == first)
230 pd->current_length -= first_sz;
231 clib_memset (vlib_buffer_get_tail (before_last), 0, first_sz);
234 pd2->lb = before_last;
235 pd2->icv_removed = 1;
236 pd2->free_buffer_index = before_last->next_buffer;
237 before_last->flags &= ~VLIB_BUFFER_NEXT_PRESENT;
241 static_always_inline u16
242 esp_insert_esn (vlib_main_t *vm, ipsec_sa_t *sa, esp_decrypt_packet_data_t *pd,
243 esp_decrypt_packet_data2_t *pd2, u32 *data_len, u8 **digest,
244 u16 *len, vlib_buffer_t *b, u8 *payload)
246 if (!ipsec_sa_is_set_USE_ESN (sa))
248 /* shift ICV by 4 bytes to insert ESN */
249 u32 seq_hi = clib_host_to_net_u32 (pd->seq_hi);
250 u8 tmp[ESP_MAX_ICV_SIZE];
252 if (pd2->icv_removed)
254 u16 space_left = vlib_buffer_space_left_at_end (vm, pd2->lb);
255 if (space_left >= N_HI_ESN_BYTES)
257 clib_memcpy_fast (vlib_buffer_get_tail (pd2->lb), &seq_hi,
259 *data_len += N_HI_ESN_BYTES;
262 return N_HI_ESN_BYTES;
264 len[0] = b->current_length;
268 clib_memcpy_fast (tmp, payload + len[0], ESP_MAX_ICV_SIZE);
269 clib_memcpy_fast (payload + len[0], &seq_hi, N_HI_ESN_BYTES);
270 clib_memcpy_fast (payload + len[0] + N_HI_ESN_BYTES, tmp,
272 *data_len += N_HI_ESN_BYTES;
273 *digest += N_HI_ESN_BYTES;
275 return N_HI_ESN_BYTES;
278 static_always_inline u8 *
279 esp_move_icv_esn (vlib_main_t * vm, vlib_buffer_t * first,
280 esp_decrypt_packet_data_t * pd,
281 esp_decrypt_packet_data2_t * pd2, u16 icv_sz,
282 ipsec_sa_t * sa, u8 * extra_esn, u32 * len)
285 u8 *digest = esp_move_icv (vm, first, pd, pd2, icv_sz, &dif);
289 if (ipsec_sa_is_set_USE_ESN (sa))
291 u32 seq_hi = clib_host_to_net_u32 (pd->seq_hi);
292 u16 space_left = vlib_buffer_space_left_at_end (vm, pd2->lb);
294 if (space_left >= N_HI_ESN_BYTES)
296 clib_memcpy_fast (vlib_buffer_get_tail (pd2->lb), &seq_hi,
298 *len += N_HI_ESN_BYTES;
302 /* no space for ESN at the tail, use the next buffer
304 ASSERT (pd2->icv_removed);
305 vlib_buffer_t *tmp = vlib_get_buffer (vm, pd2->free_buffer_index);
306 clib_memcpy_fast (vlib_buffer_get_current (tmp) - N_HI_ESN_BYTES,
307 &seq_hi, N_HI_ESN_BYTES);
314 static_always_inline int
315 esp_decrypt_chain_integ (vlib_main_t *vm, ipsec_per_thread_data_t *ptd,
316 const esp_decrypt_packet_data_t *pd,
317 esp_decrypt_packet_data2_t *pd2, ipsec_sa_t *sa0,
318 vlib_buffer_t *b, u8 icv_sz, u8 *start_src,
319 u32 start_len, u8 **digest, u16 *n_ch,
320 u32 *integ_total_len)
322 vnet_crypto_op_chunk_t *ch;
323 vlib_buffer_t *cb = vlib_get_buffer (vm, b->next_buffer);
326 vec_add2 (ptd->chunks, ch, 1);
327 total_len = ch->len = start_len;
332 vec_add2 (ptd->chunks, ch, 1);
334 ch->src = vlib_buffer_get_current (cb);
337 if (pd2->icv_removed)
338 ch->len = cb->current_length;
340 ch->len = cb->current_length - icv_sz;
341 if (ipsec_sa_is_set_USE_ESN (sa0))
343 u32 seq_hi = clib_host_to_net_u32 (pd->seq_hi);
344 u8 tmp[ESP_MAX_ICV_SIZE];
346 vlib_buffer_t *tmp_b;
347 u16 space_left = vlib_buffer_space_left_at_end (vm, pd2->lb);
348 if (space_left < N_HI_ESN_BYTES)
350 if (pd2->icv_removed)
352 /* use pre-data area from the last bufer
353 that was removed from the chain */
354 tmp_b = vlib_get_buffer (vm, pd2->free_buffer_index);
355 esn = tmp_b->data - N_HI_ESN_BYTES;
359 /* no space, need to allocate new buffer */
361 if (vlib_buffer_alloc (vm, &tmp_bi, 1) != 1)
363 tmp_b = vlib_get_buffer (vm, tmp_bi);
365 pd2->free_buffer_index = tmp_bi;
367 clib_memcpy_fast (esn, &seq_hi, N_HI_ESN_BYTES);
369 vec_add2 (ptd->chunks, ch, 1);
372 ch->len = N_HI_ESN_BYTES;
376 if (pd2->icv_removed)
378 clib_memcpy_fast (vlib_buffer_get_tail (pd2->lb),
379 &seq_hi, N_HI_ESN_BYTES);
383 clib_memcpy_fast (tmp, *digest, ESP_MAX_ICV_SIZE);
384 clib_memcpy_fast (*digest, &seq_hi, N_HI_ESN_BYTES);
385 clib_memcpy_fast (*digest + N_HI_ESN_BYTES, tmp,
387 *digest += N_HI_ESN_BYTES;
389 ch->len += N_HI_ESN_BYTES;
392 total_len += ch->len;
396 total_len += ch->len = cb->current_length;
398 if (!(cb->flags & VLIB_BUFFER_NEXT_PRESENT))
401 cb = vlib_get_buffer (vm, cb->next_buffer);
407 *integ_total_len = total_len;
412 static_always_inline u32
413 esp_decrypt_chain_crypto (vlib_main_t * vm, ipsec_per_thread_data_t * ptd,
414 esp_decrypt_packet_data_t * pd,
415 esp_decrypt_packet_data2_t * pd2,
416 ipsec_sa_t * sa0, vlib_buffer_t * b, u8 icv_sz,
417 u8 * start, u32 start_len, u8 ** tag, u16 * n_ch)
419 vnet_crypto_op_chunk_t *ch;
420 vlib_buffer_t *cb = b;
423 vec_add2 (ptd->chunks, ch, 1);
424 total_len = ch->len = start_len;
425 ch->src = ch->dst = start;
426 cb = vlib_get_buffer (vm, cb->next_buffer);
431 vec_add2 (ptd->chunks, ch, 1);
433 ch->src = ch->dst = vlib_buffer_get_current (cb);
436 if (ipsec_sa_is_set_IS_AEAD (sa0))
438 if (pd2->lb->current_length < icv_sz)
441 *tag = esp_move_icv (vm, b, pd, pd2, icv_sz, &dif);
443 /* this chunk does not contain crypto data */
445 /* and fix previous chunk's length as it might have
447 ASSERT (n_chunks > 0);
455 total_len = total_len + pd2->lb->current_length -
457 ch[-1].len = pd2->lb->current_length;
462 *tag = vlib_buffer_get_tail (pd2->lb) - icv_sz;
465 if (pd2->icv_removed)
466 total_len += ch->len = cb->current_length;
468 total_len += ch->len = cb->current_length - icv_sz;
471 total_len += ch->len = cb->current_length;
473 if (!(cb->flags & VLIB_BUFFER_NEXT_PRESENT))
476 cb = vlib_get_buffer (vm, cb->next_buffer);
485 static_always_inline void
486 esp_decrypt_prepare_sync_op (vlib_main_t * vm, vlib_node_runtime_t * node,
487 ipsec_per_thread_data_t * ptd,
488 vnet_crypto_op_t *** crypto_ops,
489 vnet_crypto_op_t *** integ_ops,
490 vnet_crypto_op_t * op,
491 ipsec_sa_t * sa0, u8 * payload,
492 u16 len, u8 icv_sz, u8 iv_sz,
493 esp_decrypt_packet_data_t * pd,
494 esp_decrypt_packet_data2_t * pd2,
495 vlib_buffer_t * b, u16 * next, u32 index)
497 const u8 esp_sz = sizeof (esp_header_t);
499 if (PREDICT_TRUE (sa0->integ_op_id != VNET_CRYPTO_OP_NONE))
501 vnet_crypto_op_init (op, sa0->integ_op_id);
502 op->key_index = sa0->integ_key_index;
504 op->flags = VNET_CRYPTO_OP_FLAG_HMAC_CHECK;
505 op->user_data = index;
506 op->digest = payload + len;
507 op->digest_len = icv_sz;
512 /* buffer is chained */
513 op->len = pd->current_length;
515 /* special case when ICV is splitted and needs to be reassembled
516 * first -> move it to the last buffer. Also take into account
517 * that ESN needs to be added after encrypted data and may or
518 * may not fit in the tail.*/
519 if (pd2->lb->current_length < icv_sz)
523 esp_move_icv_esn (vm, b, pd, pd2, icv_sz, sa0,
524 &extra_esn, &op->len);
528 /* esn is in the last buffer, that was unlinked from
530 op->len = b->current_length;
536 /* we now have a single buffer of crypto data, adjust
537 * the length (second buffer contains only ICV) */
538 *integ_ops = &ptd->integ_ops;
539 *crypto_ops = &ptd->crypto_ops;
540 len = b->current_length;
546 op->digest = vlib_buffer_get_tail (pd2->lb) - icv_sz;
548 op->flags |= VNET_CRYPTO_OP_FLAG_CHAINED_BUFFERS;
549 op->chunk_index = vec_len (ptd->chunks);
550 if (esp_decrypt_chain_integ (vm, ptd, pd, pd2, sa0, b, icv_sz,
551 payload, pd->current_length,
552 &op->digest, &op->n_chunks, 0) < 0)
554 b->error = node->errors[ESP_DECRYPT_ERROR_NO_BUFFERS];
555 next[0] = ESP_DECRYPT_NEXT_DROP;
560 esp_insert_esn (vm, sa0, pd, pd2, &op->len, &op->digest, &len, b,
563 vec_add_aligned (*(integ_ops[0]), op, 1, CLIB_CACHE_LINE_BYTES);
569 if (sa0->crypto_dec_op_id != VNET_CRYPTO_OP_NONE)
571 vnet_crypto_op_init (op, sa0->crypto_dec_op_id);
572 op->key_index = sa0->crypto_key_index;
575 if (ipsec_sa_is_set_IS_CTR (sa0))
577 /* construct nonce in a scratch space in front of the IP header */
578 esp_ctr_nonce_t *nonce =
579 (esp_ctr_nonce_t *) (payload - esp_sz - pd->hdr_sz -
581 if (ipsec_sa_is_set_IS_AEAD (sa0))
583 /* constuct aad in a scratch space in front of the nonce */
584 esp_header_t *esp0 = (esp_header_t *) (payload - esp_sz);
585 op->aad = (u8 *) nonce - sizeof (esp_aead_t);
586 op->aad_len = esp_aad_fill (op->aad, esp0, sa0, pd->seq_hi);
587 op->tag = payload + len;
592 nonce->ctr = clib_host_to_net_u32 (1);
594 nonce->salt = sa0->salt;
595 ASSERT (sizeof (u64) == iv_sz);
596 nonce->iv = *(u64 *) op->iv;
597 op->iv = (u8 *) nonce;
599 op->src = op->dst = payload += iv_sz;
600 op->len = len - iv_sz;
601 op->user_data = index;
603 if (pd->is_chain && (pd2->lb != b))
605 /* buffer is chained */
606 op->flags |= VNET_CRYPTO_OP_FLAG_CHAINED_BUFFERS;
607 op->chunk_index = vec_len (ptd->chunks);
608 esp_decrypt_chain_crypto (vm, ptd, pd, pd2, sa0, b, icv_sz,
609 payload, len - pd->iv_sz + pd->icv_sz,
610 &op->tag, &op->n_chunks);
613 vec_add_aligned (*(crypto_ops[0]), op, 1, CLIB_CACHE_LINE_BYTES);
617 static_always_inline esp_decrypt_error_t
618 esp_decrypt_prepare_async_frame (vlib_main_t *vm, vlib_node_runtime_t *node,
619 ipsec_per_thread_data_t *ptd,
620 vnet_crypto_async_frame_t *f, ipsec_sa_t *sa0,
621 u8 *payload, u16 len, u8 icv_sz, u8 iv_sz,
622 esp_decrypt_packet_data_t *pd,
623 esp_decrypt_packet_data2_t *pd2, u32 bi,
624 vlib_buffer_t *b, u16 *next, u16 async_next)
626 const u8 esp_sz = sizeof (esp_header_t);
627 esp_decrypt_packet_data_t *async_pd = &(esp_post_data (b))->decrypt_data;
628 esp_decrypt_packet_data2_t *async_pd2 = esp_post_data2 (b);
629 u8 *tag = payload + len, *iv = payload + esp_sz, *aad = 0;
631 u32 crypto_len, integ_len = 0;
632 i16 crypto_start_offset, integ_start_offset = 0;
635 if (!ipsec_sa_is_set_IS_AEAD (sa0))
638 key_index = sa0->linked_key_index;
639 integ_start_offset = payload - b->data;
641 if (PREDICT_TRUE (sa0->integ_op_id != VNET_CRYPTO_OP_NONE))
642 flags |= VNET_CRYPTO_OP_FLAG_HMAC_CHECK;
646 /* buffer is chained */
647 integ_len = pd->current_length;
649 /* special case when ICV is splitted and needs to be reassembled
650 * first -> move it to the last buffer. Also take into account
651 * that ESN needs to be added after encrypted data and may or
652 * may not fit in the tail.*/
653 if (pd2->lb->current_length < icv_sz)
656 tag = esp_move_icv_esn (vm, b, pd, pd2, icv_sz, sa0,
657 &extra_esn, &integ_len);
661 /* esn is in the last buffer, that was unlinked from
663 integ_len = b->current_length;
669 /* we now have a single buffer of crypto data, adjust
670 * the length (second buffer contains only ICV) */
671 len = b->current_length;
677 tag = vlib_buffer_get_tail (pd2->lb) - icv_sz;
679 flags |= VNET_CRYPTO_OP_FLAG_CHAINED_BUFFERS;
680 if (esp_decrypt_chain_integ (vm, ptd, pd, pd2, sa0, b, icv_sz,
681 payload, pd->current_length, &tag, 0,
684 /* allocate buffer failed, will not add to frame and drop */
685 return (ESP_DECRYPT_ERROR_NO_BUFFERS);
689 esp_insert_esn (vm, sa0, pd, pd2, &integ_len, &tag, &len, b, payload);
692 key_index = sa0->crypto_key_index;
700 if (ipsec_sa_is_set_IS_CTR (sa0))
702 /* construct nonce in a scratch space in front of the IP header */
703 esp_ctr_nonce_t *nonce =
704 (esp_ctr_nonce_t *) (payload - esp_sz - pd->hdr_sz - sizeof (*nonce));
705 if (ipsec_sa_is_set_IS_AEAD (sa0))
707 /* constuct aad in a scratch space in front of the nonce */
708 esp_header_t *esp0 = (esp_header_t *) (payload - esp_sz);
709 aad = (u8 *) nonce - sizeof (esp_aead_t);
710 esp_aad_fill (aad, esp0, sa0, pd->seq_hi);
715 nonce->ctr = clib_host_to_net_u32 (1);
717 nonce->salt = sa0->salt;
718 ASSERT (sizeof (u64) == iv_sz);
719 nonce->iv = *(u64 *) iv;
723 crypto_start_offset = (payload += iv_sz) - b->data;
724 crypto_len = len - iv_sz;
726 if (pd->is_chain && (pd2->lb != b))
728 /* buffer is chained */
729 flags |= VNET_CRYPTO_OP_FLAG_CHAINED_BUFFERS;
731 crypto_len = esp_decrypt_chain_crypto (vm, ptd, pd, pd2, sa0, b, icv_sz,
733 len - pd->iv_sz + pd->icv_sz,
740 /* for AEAD integ_len - crypto_len will be negative, it is ok since it
741 * is ignored by the engine. */
742 vnet_crypto_async_add_to_frame (
743 vm, f, key_index, crypto_len, integ_len - crypto_len, crypto_start_offset,
744 integ_start_offset, bi, async_next, iv, tag, aad, flags);
746 return (ESP_DECRYPT_ERROR_RX_PKTS);
749 static_always_inline void
750 esp_decrypt_post_crypto (vlib_main_t *vm, const vlib_node_runtime_t *node,
751 const u16 *next_by_next_header,
752 const esp_decrypt_packet_data_t *pd,
753 const esp_decrypt_packet_data2_t *pd2,
754 vlib_buffer_t *b, u16 *next, int is_ip6, int is_tun,
757 ipsec_sa_t *sa0 = ipsec_sa_get (pd->sa_index);
758 vlib_buffer_t *lb = b;
759 const u8 esp_sz = sizeof (esp_header_t);
760 const u8 tun_flags = IPSEC_SA_FLAG_IS_TUNNEL | IPSEC_SA_FLAG_IS_TUNNEL_V6;
761 u8 pad_length = 0, next_header = 0;
765 * redo the anti-reply check
766 * in this frame say we have sequence numbers, s, s+1, s+1, s+1
767 * and s and s+1 are in the window. When we did the anti-replay
768 * check above we did so against the state of the window (W),
769 * after packet s-1. So each of the packets in the sequence will be
771 * This time s will be cheked against Ws-1, s+1 chceked against Ws
772 * (i.e. the window state is updated/advnaced)
773 * so this time the successive s+! packet will be dropped.
774 * This is a consequence of batching the decrypts. If the
775 * check-dcrypt-advance process was done for each packet it would
776 * be fine. But we batch the decrypts because it's much more efficient
777 * to do so in SW and if we offload to HW and the process is async.
779 * You're probably thinking, but this means an attacker can send the
780 * above sequence and cause VPP to perform decrpyts that will fail,
781 * and that's true. But if the attacker can determine s (a valid
782 * sequence number in the window) which is non-trivial, it can generate
783 * a sequence s, s+1, s+2, s+3, ... s+n and nothing will prevent any
784 * implementation, sequential or batching, from decrypting these.
786 if (ipsec_sa_anti_replay_and_sn_advance (sa0, pd->seq, pd->seq_hi, true,
789 b->error = node->errors[ESP_DECRYPT_ERROR_REPLAY];
790 next[0] = ESP_DECRYPT_NEXT_DROP;
795 ipsec_sa_anti_replay_advance (sa0, vm->thread_index, pd->seq, pd->seq_hi);
797 vlib_prefetch_simple_counter (&ipsec_sa_lost_counters, vm->thread_index,
803 icv_sz = pd2->icv_removed ? 0 : pd->icv_sz;
804 if (pd2->free_buffer_index)
806 vlib_buffer_free_one (vm, pd2->free_buffer_index);
809 if (lb->current_length < sizeof (esp_footer_t) + icv_sz)
811 /* esp footer is either splitted in two buffers or in the before
814 vlib_buffer_t *before_last = b, *bp = b;
815 while (bp->flags & VLIB_BUFFER_NEXT_PRESENT)
818 bp = vlib_get_buffer (vm, bp->next_buffer);
820 u8 *bt = vlib_buffer_get_tail (before_last);
822 if (lb->current_length == icv_sz)
824 esp_footer_t *f = (esp_footer_t *) (bt - sizeof (*f));
825 pad_length = f->pad_length;
826 next_header = f->next_header;
830 pad_length = (bt - 1)[0];
831 next_header = ((u8 *) vlib_buffer_get_current (lb))[0];
837 (esp_footer_t *) (lb->data + lb->current_data +
838 lb->current_length - sizeof (esp_footer_t) -
840 pad_length = f->pad_length;
841 next_header = f->next_header;
848 (esp_footer_t *) (lb->data + lb->current_data + lb->current_length -
849 sizeof (esp_footer_t) - icv_sz);
850 pad_length = f->pad_length;
851 next_header = f->next_header;
854 u16 adv = pd->iv_sz + esp_sz;
855 u16 tail = sizeof (esp_footer_t) + pad_length + icv_sz;
856 u16 tail_orig = sizeof (esp_footer_t) + pad_length + pd->icv_sz;
857 b->flags &= ~VLIB_BUFFER_TOTAL_LENGTH_VALID;
859 if ((pd->flags & tun_flags) == 0 && !is_tun) /* transport mode */
861 u8 udp_sz = (is_ip6 == 0 && pd->flags & IPSEC_SA_FLAG_UDP_ENCAP) ?
862 sizeof (udp_header_t) : 0;
863 u16 ip_hdr_sz = pd->hdr_sz - udp_sz;
864 u8 *old_ip = b->data + pd->current_data - ip_hdr_sz - udp_sz;
865 u8 *ip = old_ip + adv + udp_sz;
867 if (is_ip6 && ip_hdr_sz > 64)
868 memmove (ip, old_ip, ip_hdr_sz);
870 clib_memcpy_le64 (ip, old_ip, ip_hdr_sz);
872 b->current_data = pd->current_data + adv - ip_hdr_sz;
873 b->current_length += ip_hdr_sz - adv;
874 esp_remove_tail (vm, b, lb, tail);
878 ip6_header_t *ip6 = (ip6_header_t *) ip;
879 u16 len = clib_net_to_host_u16 (ip6->payload_length);
880 len -= adv + tail_orig;
881 ip6->payload_length = clib_host_to_net_u16 (len);
882 ip6->protocol = next_header;
883 next[0] = ESP_DECRYPT_NEXT_IP6_INPUT;
887 ip4_header_t *ip4 = (ip4_header_t *) ip;
888 ip_csum_t sum = ip4->checksum;
889 u16 len = clib_net_to_host_u16 (ip4->length);
890 len = clib_host_to_net_u16 (len - adv - tail_orig - udp_sz);
891 sum = ip_csum_update (sum, ip4->protocol, next_header,
892 ip4_header_t, protocol);
893 sum = ip_csum_update (sum, ip4->length, len, ip4_header_t, length);
894 ip4->checksum = ip_csum_fold (sum);
895 ip4->protocol = next_header;
897 next[0] = ESP_DECRYPT_NEXT_IP4_INPUT;
902 if (PREDICT_TRUE (next_header == IP_PROTOCOL_IP_IN_IP))
904 next[0] = ESP_DECRYPT_NEXT_IP4_INPUT;
905 b->current_data = pd->current_data + adv;
906 b->current_length = pd->current_length - adv;
907 esp_remove_tail (vm, b, lb, tail);
909 else if (next_header == IP_PROTOCOL_IPV6)
911 next[0] = ESP_DECRYPT_NEXT_IP6_INPUT;
912 b->current_data = pd->current_data + adv;
913 b->current_length = pd->current_length - adv;
914 esp_remove_tail (vm, b, lb, tail);
916 else if (next_header == IP_PROTOCOL_MPLS_IN_IP)
918 next[0] = ESP_DECRYPT_NEXT_MPLS_INPUT;
919 b->current_data = pd->current_data + adv;
920 b->current_length = pd->current_length - adv;
921 esp_remove_tail (vm, b, lb, tail);
923 else if (is_tun && next_header == IP_PROTOCOL_GRE)
927 b->current_data = pd->current_data + adv;
928 b->current_length = pd->current_length - adv - tail;
930 gre = vlib_buffer_get_current (b);
932 vlib_buffer_advance (b, sizeof (*gre));
934 switch (clib_net_to_host_u16 (gre->protocol))
936 case GRE_PROTOCOL_teb:
937 vnet_update_l2_len (b);
938 next[0] = ESP_DECRYPT_NEXT_L2_INPUT;
940 case GRE_PROTOCOL_ip4:
941 next[0] = ESP_DECRYPT_NEXT_IP4_INPUT;
943 case GRE_PROTOCOL_ip6:
944 next[0] = ESP_DECRYPT_NEXT_IP6_INPUT;
947 b->error = node->errors[ESP_DECRYPT_ERROR_UNSUP_PAYLOAD];
948 next[0] = ESP_DECRYPT_NEXT_DROP;
952 else if ((next[0] = vec_elt (next_by_next_header, next_header)) !=
955 b->current_data = pd->current_data + adv;
956 b->current_length = pd->current_length - adv;
957 esp_remove_tail (vm, b, lb, tail);
961 next[0] = ESP_DECRYPT_NEXT_DROP;
962 b->error = node->errors[ESP_DECRYPT_ERROR_UNSUP_PAYLOAD];
968 if (ipsec_sa_is_set_IS_PROTECT (sa0))
971 * There are two encap possibilities
972 * 1) the tunnel and ths SA are prodiving encap, i.e. it's
973 * MAC | SA-IP | TUN-IP | ESP | PAYLOAD
974 * implying the SA is in tunnel mode (on a tunnel interface)
975 * 2) only the tunnel provides encap
976 * MAC | TUN-IP | ESP | PAYLOAD
977 * implying the SA is in transport mode.
979 * For 2) we need only strip the tunnel encap and we're good.
980 * since the tunnel and crypto ecnap (int the tun=protect
981 * object) are the same and we verified above that these match
982 * for 1) we need to strip the SA-IP outer headers, to
983 * reveal the tunnel IP and then check that this matches
984 * the configured tunnel.
986 const ipsec_tun_protect_t *itp;
989 ipsec_tun_protect_get (vnet_buffer (b)->ipsec.protect_index);
991 if (PREDICT_TRUE (next_header == IP_PROTOCOL_IP_IN_IP))
993 const ip4_header_t *ip4;
995 ip4 = vlib_buffer_get_current (b);
997 if (!ip46_address_is_equal_v4 (&itp->itp_tun.src,
998 &ip4->dst_address) ||
999 !ip46_address_is_equal_v4 (&itp->itp_tun.dst,
1002 next[0] = ESP_DECRYPT_NEXT_DROP;
1003 b->error = node->errors[ESP_DECRYPT_ERROR_TUN_NO_PROTO];
1006 else if (next_header == IP_PROTOCOL_IPV6)
1008 const ip6_header_t *ip6;
1010 ip6 = vlib_buffer_get_current (b);
1012 if (!ip46_address_is_equal_v6 (&itp->itp_tun.src,
1013 &ip6->dst_address) ||
1014 !ip46_address_is_equal_v6 (&itp->itp_tun.dst,
1017 next[0] = ESP_DECRYPT_NEXT_DROP;
1018 b->error = node->errors[ESP_DECRYPT_ERROR_TUN_NO_PROTO];
1025 if (PREDICT_FALSE (n_lost))
1026 vlib_increment_simple_counter (&ipsec_sa_lost_counters, vm->thread_index,
1027 pd->sa_index, n_lost);
1031 esp_decrypt_inline (vlib_main_t *vm, vlib_node_runtime_t *node,
1032 vlib_frame_t *from_frame, int is_ip6, int is_tun,
1033 u16 async_next_node)
1035 ipsec_main_t *im = &ipsec_main;
1036 const u16 *next_by_next_header = im->next_header_registrations;
1037 u32 thread_index = vm->thread_index;
1039 ipsec_per_thread_data_t *ptd = vec_elt_at_index (im->ptd, thread_index);
1040 u32 *from = vlib_frame_vector_args (from_frame);
1041 u32 n_left = from_frame->n_vectors;
1042 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
1043 vlib_buffer_t *sync_bufs[VLIB_FRAME_SIZE];
1044 u16 sync_nexts[VLIB_FRAME_SIZE], *sync_next = sync_nexts, n_sync = 0;
1045 u16 async_nexts[VLIB_FRAME_SIZE], *async_next = async_nexts;
1046 u16 noop_nexts[VLIB_FRAME_SIZE], *noop_next = noop_nexts, n_noop = 0;
1047 u32 sync_bi[VLIB_FRAME_SIZE];
1048 u32 noop_bi[VLIB_FRAME_SIZE];
1049 esp_decrypt_packet_data_t pkt_data[VLIB_FRAME_SIZE], *pd = pkt_data;
1050 esp_decrypt_packet_data2_t pkt_data2[VLIB_FRAME_SIZE], *pd2 = pkt_data2;
1051 esp_decrypt_packet_data_t cpd = { };
1052 u32 current_sa_index = ~0, current_sa_bytes = 0, current_sa_pkts = 0;
1053 const u8 esp_sz = sizeof (esp_header_t);
1054 ipsec_sa_t *sa0 = 0;
1055 vnet_crypto_op_t _op, *op = &_op;
1056 vnet_crypto_op_t **crypto_ops;
1057 vnet_crypto_op_t **integ_ops;
1058 int is_async = im->async_mode;
1059 vnet_crypto_async_op_id_t async_op = ~0;
1060 vnet_crypto_async_frame_t *async_frames[VNET_CRYPTO_ASYNC_OP_N_IDS];
1061 esp_decrypt_error_t err;
1063 vlib_get_buffers (vm, from, b, n_left);
1066 vec_reset_length (ptd->crypto_ops);
1067 vec_reset_length (ptd->integ_ops);
1068 vec_reset_length (ptd->chained_crypto_ops);
1069 vec_reset_length (ptd->chained_integ_ops);
1071 vec_reset_length (ptd->async_frames);
1072 vec_reset_length (ptd->chunks);
1073 clib_memset (sync_nexts, -1, sizeof (sync_nexts));
1074 clib_memset (async_frames, 0, sizeof (async_frames));
1080 err = ESP_DECRYPT_ERROR_RX_PKTS;
1084 vlib_prefetch_buffer_header (b[2], LOAD);
1085 p = vlib_buffer_get_current (b[1]);
1086 clib_prefetch_load (p);
1087 p -= CLIB_CACHE_LINE_BYTES;
1088 clib_prefetch_load (p);
1091 u32 n_bufs = vlib_buffer_chain_linearize (vm, b[0]);
1094 err = ESP_DECRYPT_ERROR_NO_BUFFERS;
1095 esp_set_next_index (b[0], node, err, n_noop, noop_nexts,
1096 ESP_DECRYPT_NEXT_DROP);
1100 if (vnet_buffer (b[0])->ipsec.sad_index != current_sa_index)
1102 if (current_sa_pkts)
1103 vlib_increment_combined_counter (&ipsec_sa_counters, thread_index,
1107 current_sa_bytes = current_sa_pkts = 0;
1109 current_sa_index = vnet_buffer (b[0])->ipsec.sad_index;
1110 sa0 = ipsec_sa_get (current_sa_index);
1112 /* fetch the second cacheline ASAP */
1113 clib_prefetch_load (sa0->cacheline1);
1114 cpd.icv_sz = sa0->integ_icv_size;
1115 cpd.iv_sz = sa0->crypto_iv_size;
1116 cpd.flags = sa0->flags;
1117 cpd.sa_index = current_sa_index;
1118 is_async = im->async_mode | ipsec_sa_is_set_IS_ASYNC (sa0);
1121 if (PREDICT_FALSE (~0 == sa0->thread_index))
1123 /* this is the first packet to use this SA, claim the SA
1124 * for this thread. this could happen simultaneously on
1126 clib_atomic_cmp_and_swap (&sa0->thread_index, ~0,
1127 ipsec_sa_assign_thread (thread_index));
1130 if (PREDICT_FALSE (thread_index != sa0->thread_index))
1132 vnet_buffer (b[0])->ipsec.thread_index = sa0->thread_index;
1133 err = ESP_DECRYPT_ERROR_HANDOFF;
1134 esp_set_next_index (b[0], node, err, n_noop, noop_nexts,
1135 ESP_DECRYPT_NEXT_HANDOFF);
1139 /* store packet data for next round for easier prefetch */
1140 pd->sa_data = cpd.sa_data;
1141 pd->current_data = b[0]->current_data;
1142 pd->hdr_sz = pd->current_data - vnet_buffer (b[0])->l3_hdr_offset;
1143 payload = b[0]->data + pd->current_data;
1144 pd->seq = clib_host_to_net_u32 (((esp_header_t *) payload)->seq);
1147 pd2->free_buffer_index = 0;
1148 pd2->icv_removed = 0;
1153 /* find last buffer in the chain */
1154 while (pd2->lb->flags & VLIB_BUFFER_NEXT_PRESENT)
1155 pd2->lb = vlib_get_buffer (vm, pd2->lb->next_buffer);
1157 crypto_ops = &ptd->chained_crypto_ops;
1158 integ_ops = &ptd->chained_integ_ops;
1162 crypto_ops = &ptd->crypto_ops;
1163 integ_ops = &ptd->integ_ops;
1166 pd->current_length = b[0]->current_length;
1168 /* anti-reply check */
1169 if (ipsec_sa_anti_replay_and_sn_advance (sa0, pd->seq, ~0, false,
1172 err = ESP_DECRYPT_ERROR_REPLAY;
1173 esp_set_next_index (b[0], node, err, n_noop, noop_nexts,
1174 ESP_DECRYPT_NEXT_DROP);
1178 if (pd->current_length < cpd.icv_sz + esp_sz + cpd.iv_sz)
1180 err = ESP_DECRYPT_ERROR_RUNT;
1181 esp_set_next_index (b[0], node, err, n_noop, noop_nexts,
1182 ESP_DECRYPT_NEXT_DROP);
1186 len = pd->current_length - cpd.icv_sz;
1187 current_sa_pkts += 1;
1188 current_sa_bytes += vlib_buffer_length_in_chain (vm, b[0]);
1192 async_op = sa0->crypto_async_dec_op_id;
1194 /* get a frame for this op if we don't yet have one or it's full
1196 if (NULL == async_frames[async_op] ||
1197 vnet_crypto_async_frame_is_full (async_frames[async_op]))
1199 async_frames[async_op] =
1200 vnet_crypto_async_get_frame (vm, async_op);
1201 /* Save the frame to the list we'll submit at the end */
1202 vec_add1 (ptd->async_frames, async_frames[async_op]);
1205 err = esp_decrypt_prepare_async_frame (
1206 vm, node, ptd, async_frames[async_op], sa0, payload, len,
1207 cpd.icv_sz, cpd.iv_sz, pd, pd2, from[b - bufs], b[0], async_next,
1209 if (ESP_DECRYPT_ERROR_RX_PKTS != err)
1211 esp_set_next_index (b[0], node, err, n_noop, noop_nexts,
1212 ESP_DECRYPT_NEXT_DROP);
1216 esp_decrypt_prepare_sync_op (
1217 vm, node, ptd, &crypto_ops, &integ_ops, op, sa0, payload, len,
1218 cpd.icv_sz, cpd.iv_sz, pd, pd2, b[0], sync_next, b - bufs);
1221 if (ESP_DECRYPT_ERROR_RX_PKTS != err)
1223 noop_bi[n_noop] = from[b - bufs];
1229 sync_bi[n_sync] = from[b - bufs];
1230 sync_bufs[n_sync] = b[0];
1243 if (PREDICT_TRUE (~0 != current_sa_index))
1244 vlib_increment_combined_counter (&ipsec_sa_counters, thread_index,
1245 current_sa_index, current_sa_pkts,
1248 /* submit or free all of the open frames */
1249 vnet_crypto_async_frame_t **async_frame;
1251 vec_foreach (async_frame, ptd->async_frames)
1253 /* free frame and move on if no ops were successfully added */
1254 if (PREDICT_FALSE (!(*async_frame)->n_elts))
1256 vnet_crypto_async_free_frame (vm, *async_frame);
1259 if (vnet_crypto_async_submit_open_frame (vm, *async_frame) < 0)
1261 n_noop += esp_async_recycle_failed_submit (
1262 vm, *async_frame, node, ESP_DECRYPT_ERROR_CRYPTO_ENGINE_ERROR,
1263 n_noop, noop_bi, noop_nexts, ESP_DECRYPT_NEXT_DROP);
1264 vnet_crypto_async_reset_frame (*async_frame);
1265 vnet_crypto_async_free_frame (vm, *async_frame);
1271 esp_process_ops (vm, node, ptd->integ_ops, sync_bufs, sync_nexts,
1272 ESP_DECRYPT_ERROR_INTEG_ERROR);
1273 esp_process_chained_ops (vm, node, ptd->chained_integ_ops, sync_bufs,
1274 sync_nexts, ptd->chunks,
1275 ESP_DECRYPT_ERROR_INTEG_ERROR);
1277 esp_process_ops (vm, node, ptd->crypto_ops, sync_bufs, sync_nexts,
1278 ESP_DECRYPT_ERROR_DECRYPTION_FAILED);
1279 esp_process_chained_ops (vm, node, ptd->chained_crypto_ops, sync_bufs,
1280 sync_nexts, ptd->chunks,
1281 ESP_DECRYPT_ERROR_DECRYPTION_FAILED);
1284 /* Post decryption ronud - adjust packet data start and length and next
1288 sync_next = sync_nexts;
1297 void *data = b[1]->data + pd[1].current_data;
1299 /* buffer metadata */
1300 vlib_prefetch_buffer_header (b[1], LOAD);
1303 CLIB_PREFETCH (data + pd[1].current_length - pd[1].icv_sz - 2,
1304 CLIB_CACHE_LINE_BYTES, LOAD);
1306 /* packet headers */
1307 CLIB_PREFETCH (data - CLIB_CACHE_LINE_BYTES,
1308 CLIB_CACHE_LINE_BYTES * 2, LOAD);
1311 /* save the sa_index as GRE_teb post_crypto changes L2 opaque */
1312 if (PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_IS_TRACED))
1313 current_sa_index = vnet_buffer (b[0])->ipsec.sad_index;
1315 if (sync_next[0] >= ESP_DECRYPT_N_NEXT)
1316 esp_decrypt_post_crypto (vm, node, next_by_next_header, pd, pd2, b[0],
1317 sync_next, is_ip6, is_tun, 0);
1320 if (PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_IS_TRACED))
1322 esp_decrypt_trace_t *tr;
1323 tr = vlib_add_trace (vm, node, b[0], sizeof (*tr));
1324 sa0 = ipsec_sa_get (current_sa_index);
1325 tr->crypto_alg = sa0->crypto_alg;
1326 tr->integ_alg = sa0->integ_alg;
1328 tr->sa_seq = sa0->seq;
1329 tr->sa_seq_hi = sa0->seq_hi;
1330 tr->pkt_seq_hi = pd->seq_hi;
1341 vlib_node_increment_counter (vm, node->node_index, ESP_DECRYPT_ERROR_RX_PKTS,
1342 from_frame->n_vectors);
1345 vlib_buffer_enqueue_to_next (vm, node, sync_bi, sync_nexts, n_sync);
1348 vlib_buffer_enqueue_to_next (vm, node, noop_bi, noop_nexts, n_noop);
1350 return (from_frame->n_vectors);
1354 esp_decrypt_post_inline (vlib_main_t * vm,
1355 vlib_node_runtime_t * node,
1356 vlib_frame_t * from_frame, int is_ip6, int is_tun)
1358 const ipsec_main_t *im = &ipsec_main;
1359 const u16 *next_by_next_header = im->next_header_registrations;
1360 u32 *from = vlib_frame_vector_args (from_frame);
1361 u32 n_left = from_frame->n_vectors;
1362 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
1363 u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
1364 vlib_get_buffers (vm, from, b, n_left);
1368 esp_decrypt_packet_data_t *pd = &(esp_post_data (b[0]))->decrypt_data;
1372 vlib_prefetch_buffer_header (b[2], LOAD);
1373 vlib_prefetch_buffer_header (b[1], LOAD);
1377 esp_decrypt_post_crypto (vm, node, next_by_next_header, pd, 0, b[0],
1378 next, is_ip6, is_tun, 1);
1381 esp_decrypt_packet_data2_t *pd2 = esp_post_data2 (b[0]);
1382 esp_decrypt_post_crypto (vm, node, next_by_next_header, pd, pd2,
1383 b[0], next, is_ip6, is_tun, 1);
1387 if (PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_IS_TRACED))
1389 ipsec_sa_t *sa0 = ipsec_sa_get (pd->sa_index);
1390 esp_decrypt_trace_t *tr;
1391 esp_decrypt_packet_data_t *async_pd =
1392 &(esp_post_data (b[0]))->decrypt_data;
1393 tr = vlib_add_trace (vm, node, b[0], sizeof (*tr));
1394 sa0 = ipsec_sa_get (async_pd->sa_index);
1396 tr->crypto_alg = sa0->crypto_alg;
1397 tr->integ_alg = sa0->integ_alg;
1399 tr->sa_seq = sa0->seq;
1400 tr->sa_seq_hi = sa0->seq_hi;
1408 n_left = from_frame->n_vectors;
1409 vlib_node_increment_counter (vm, node->node_index,
1410 ESP_DECRYPT_ERROR_RX_POST_PKTS, n_left);
1412 vlib_buffer_enqueue_to_next (vm, node, from, nexts, n_left);
1417 VLIB_NODE_FN (esp4_decrypt_node) (vlib_main_t * vm,
1418 vlib_node_runtime_t * node,
1419 vlib_frame_t * from_frame)
1421 return esp_decrypt_inline (vm, node, from_frame, 0, 0,
1422 esp_decrypt_async_next.esp4_post_next);
1425 VLIB_NODE_FN (esp4_decrypt_post_node) (vlib_main_t * vm,
1426 vlib_node_runtime_t * node,
1427 vlib_frame_t * from_frame)
1429 return esp_decrypt_post_inline (vm, node, from_frame, 0, 0);
1432 VLIB_NODE_FN (esp4_decrypt_tun_node) (vlib_main_t * vm,
1433 vlib_node_runtime_t * node,
1434 vlib_frame_t * from_frame)
1436 return esp_decrypt_inline (vm, node, from_frame, 0, 1,
1437 esp_decrypt_async_next.esp4_tun_post_next);
1440 VLIB_NODE_FN (esp4_decrypt_tun_post_node) (vlib_main_t * vm,
1441 vlib_node_runtime_t * node,
1442 vlib_frame_t * from_frame)
1444 return esp_decrypt_post_inline (vm, node, from_frame, 0, 1);
1447 VLIB_NODE_FN (esp6_decrypt_node) (vlib_main_t * vm,
1448 vlib_node_runtime_t * node,
1449 vlib_frame_t * from_frame)
1451 return esp_decrypt_inline (vm, node, from_frame, 1, 0,
1452 esp_decrypt_async_next.esp6_post_next);
1455 VLIB_NODE_FN (esp6_decrypt_post_node) (vlib_main_t * vm,
1456 vlib_node_runtime_t * node,
1457 vlib_frame_t * from_frame)
1459 return esp_decrypt_post_inline (vm, node, from_frame, 1, 0);
1462 VLIB_NODE_FN (esp6_decrypt_tun_node) (vlib_main_t * vm,
1463 vlib_node_runtime_t * node,
1464 vlib_frame_t * from_frame)
1466 return esp_decrypt_inline (vm, node, from_frame, 1, 1,
1467 esp_decrypt_async_next.esp6_tun_post_next);
1470 VLIB_NODE_FN (esp6_decrypt_tun_post_node) (vlib_main_t * vm,
1471 vlib_node_runtime_t * node,
1472 vlib_frame_t * from_frame)
1474 return esp_decrypt_post_inline (vm, node, from_frame, 1, 1);
1478 VLIB_REGISTER_NODE (esp4_decrypt_node) = {
1479 .name = "esp4-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] = "ip4-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] = "esp4-decrypt-handoff",
1498 VLIB_REGISTER_NODE (esp4_decrypt_post_node) = {
1499 .name = "esp4-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 = "esp4-decrypt",
1510 VLIB_REGISTER_NODE (esp6_decrypt_node) = {
1511 .name = "esp6-decrypt",
1512 .vector_size = sizeof (u32),
1513 .format_trace = format_esp_decrypt_trace,
1514 .type = VLIB_NODE_TYPE_INTERNAL,
1516 .n_errors = ARRAY_LEN(esp_decrypt_error_strings),
1517 .error_strings = esp_decrypt_error_strings,
1519 .n_next_nodes = ESP_DECRYPT_N_NEXT,
1521 [ESP_DECRYPT_NEXT_DROP] = "ip6-drop",
1522 [ESP_DECRYPT_NEXT_IP4_INPUT] = "ip4-input-no-checksum",
1523 [ESP_DECRYPT_NEXT_IP6_INPUT] = "ip6-input",
1524 [ESP_DECRYPT_NEXT_MPLS_INPUT] = "mpls-drop",
1525 [ESP_DECRYPT_NEXT_L2_INPUT] = "l2-input",
1526 [ESP_DECRYPT_NEXT_HANDOFF]= "esp6-decrypt-handoff",
1530 VLIB_REGISTER_NODE (esp6_decrypt_post_node) = {
1531 .name = "esp6-decrypt-post",
1532 .vector_size = sizeof (u32),
1533 .format_trace = format_esp_decrypt_trace,
1534 .type = VLIB_NODE_TYPE_INTERNAL,
1536 .n_errors = ARRAY_LEN(esp_decrypt_error_strings),
1537 .error_strings = esp_decrypt_error_strings,
1539 .sibling_of = "esp6-decrypt",
1542 VLIB_REGISTER_NODE (esp4_decrypt_tun_node) = {
1543 .name = "esp4-decrypt-tun",
1544 .vector_size = sizeof (u32),
1545 .format_trace = format_esp_decrypt_trace,
1546 .type = VLIB_NODE_TYPE_INTERNAL,
1547 .n_errors = ARRAY_LEN(esp_decrypt_error_strings),
1548 .error_strings = esp_decrypt_error_strings,
1549 .n_next_nodes = ESP_DECRYPT_N_NEXT,
1551 [ESP_DECRYPT_NEXT_DROP] = "ip4-drop",
1552 [ESP_DECRYPT_NEXT_IP4_INPUT] = "ip4-input-no-checksum",
1553 [ESP_DECRYPT_NEXT_IP6_INPUT] = "ip6-input",
1554 [ESP_DECRYPT_NEXT_MPLS_INPUT] = "mpls-input",
1555 [ESP_DECRYPT_NEXT_L2_INPUT] = "l2-input",
1556 [ESP_DECRYPT_NEXT_HANDOFF] = "esp4-decrypt-tun-handoff",
1560 VLIB_REGISTER_NODE (esp4_decrypt_tun_post_node) = {
1561 .name = "esp4-decrypt-tun-post",
1562 .vector_size = sizeof (u32),
1563 .format_trace = format_esp_decrypt_trace,
1564 .type = VLIB_NODE_TYPE_INTERNAL,
1566 .n_errors = ARRAY_LEN(esp_decrypt_error_strings),
1567 .error_strings = esp_decrypt_error_strings,
1569 .sibling_of = "esp4-decrypt-tun",
1572 VLIB_REGISTER_NODE (esp6_decrypt_tun_node) = {
1573 .name = "esp6-decrypt-tun",
1574 .vector_size = sizeof (u32),
1575 .format_trace = format_esp_decrypt_trace,
1576 .type = VLIB_NODE_TYPE_INTERNAL,
1577 .n_errors = ARRAY_LEN(esp_decrypt_error_strings),
1578 .error_strings = esp_decrypt_error_strings,
1579 .n_next_nodes = ESP_DECRYPT_N_NEXT,
1581 [ESP_DECRYPT_NEXT_DROP] = "ip6-drop",
1582 [ESP_DECRYPT_NEXT_IP4_INPUT] = "ip4-input-no-checksum",
1583 [ESP_DECRYPT_NEXT_IP6_INPUT] = "ip6-input",
1584 [ESP_DECRYPT_NEXT_MPLS_INPUT] = "mpls-input",
1585 [ESP_DECRYPT_NEXT_L2_INPUT] = "l2-input",
1586 [ESP_DECRYPT_NEXT_HANDOFF]= "esp6-decrypt-tun-handoff",
1590 VLIB_REGISTER_NODE (esp6_decrypt_tun_post_node) = {
1591 .name = "esp6-decrypt-tun-post",
1592 .vector_size = sizeof (u32),
1593 .format_trace = format_esp_decrypt_trace,
1594 .type = VLIB_NODE_TYPE_INTERNAL,
1596 .n_errors = ARRAY_LEN(esp_decrypt_error_strings),
1597 .error_strings = esp_decrypt_error_strings,
1599 .sibling_of = "esp6-decrypt-tun",
1603 #ifndef CLIB_MARCH_VARIANT
1605 static clib_error_t *
1606 esp_decrypt_init (vlib_main_t *vm)
1608 ipsec_main_t *im = &ipsec_main;
1610 im->esp4_dec_fq_index =
1611 vlib_frame_queue_main_init (esp4_decrypt_node.index, 0);
1612 im->esp6_dec_fq_index =
1613 vlib_frame_queue_main_init (esp6_decrypt_node.index, 0);
1614 im->esp4_dec_tun_fq_index =
1615 vlib_frame_queue_main_init (esp4_decrypt_tun_node.index, 0);
1616 im->esp6_dec_tun_fq_index =
1617 vlib_frame_queue_main_init (esp6_decrypt_tun_node.index, 0);
1622 VLIB_INIT_FUNCTION (esp_decrypt_init);
1627 * fd.io coding-style-patch-verification: ON
1630 * eval: (c-set-style "gnu")