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Vector Packet Processing
esp_decrypt.c
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1 /*
2  * esp_decrypt.c : IPSec ESP decrypt node
3  *
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:
8  *
9  * http://www.apache.org/licenses/LICENSE-2.0
10  *
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.
16  */
17 
18 #include <vnet/vnet.h>
19 #include <vnet/api_errno.h>
20 #include <vnet/ip/ip.h>
21 #include <vnet/l2/l2_input.h>
22 
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>
27 
28 #include <vnet/gre/gre.h>
29 
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 _(HANDOFF, "handoff") \
36 _(PENDING, "pending")
37 
38 #define _(v, s) ESP_DECRYPT_NEXT_##v,
39 typedef enum
40 {
42 #undef _
45 
46 #define foreach_esp_decrypt_post_next \
47 _(DROP, "error-drop") \
48 _(IP4_INPUT, "ip4-input-no-checksum") \
49 _(IP6_INPUT, "ip6-input") \
50 _(L2_INPUT, "l2-input")
51 
52 #define _(v, s) ESP_DECRYPT_POST_NEXT_##v,
53 typedef enum
54 {
56 #undef _
59 
60 #define foreach_esp_decrypt_error \
61  _(RX_PKTS, "ESP pkts received") \
62  _(RX_POST_PKTS, "ESP-POST pkts received") \
63  _(DECRYPTION_FAILED, "ESP decryption failed") \
64  _(INTEG_ERROR, "Integrity check failed") \
65  _(CRYPTO_ENGINE_ERROR, "crypto engine error (packet dropped)") \
66  _(REPLAY, "SA replayed packet") \
67  _(RUNT, "undersized packet") \
68  _(NO_BUFFERS, "no buffers (packet dropped)") \
69  _(OVERSIZED_HEADER, "buffer with oversized header (dropped)") \
70  _(NO_TAIL_SPACE, "no enough buffer tail space (dropped)") \
71  _(TUN_NO_PROTO, "no tunnel protocol") \
72  _(UNSUP_PAYLOAD, "unsupported payload") \
73 
74 
75 typedef enum
76 {
77 #define _(sym,str) ESP_DECRYPT_ERROR_##sym,
79 #undef _
82 
83 static char *esp_decrypt_error_strings[] = {
84 #define _(sym,string) string,
86 #undef _
87 };
88 
89 typedef struct
90 {
94  ipsec_crypto_alg_t crypto_alg;
97 
98 /* packet trace format function */
99 static u8 *
100 format_esp_decrypt_trace (u8 * s, va_list * args)
101 {
102  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
103  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
104  esp_decrypt_trace_t *t = va_arg (*args, esp_decrypt_trace_t *);
105 
106  s =
107  format (s,
108  "esp: crypto %U integrity %U pkt-seq %d sa-seq %u sa-seq-hi %u",
110  t->integ_alg, t->seq, t->sa_seq, t->sa_seq_hi);
111  return s;
112 }
113 
114 #define ESP_ENCRYPT_PD_F_FD_TRANSPORT (1 << 2)
115 
118  vnet_crypto_op_t * ops, vlib_buffer_t * b[], u16 * nexts,
119  int e)
120 {
121  vnet_crypto_op_t *op = ops;
122  u32 n_fail, n_ops = vec_len (ops);
123 
124  if (n_ops == 0)
125  return;
126 
127  n_fail = n_ops - vnet_crypto_process_ops (vm, op, n_ops);
128 
129  while (n_fail)
130  {
131  ASSERT (op - ops < n_ops);
132  if (op->status != VNET_CRYPTO_OP_STATUS_COMPLETED)
133  {
134  u32 err, bi = op->user_data;
135  if (op->status == VNET_CRYPTO_OP_STATUS_FAIL_BAD_HMAC)
136  err = e;
137  else
138  err = ESP_DECRYPT_ERROR_CRYPTO_ENGINE_ERROR;
139  b[bi]->error = node->errors[err];
140  nexts[bi] = ESP_DECRYPT_NEXT_DROP;
141  n_fail--;
142  }
143  op++;
144  }
145 }
146 
149  vnet_crypto_op_t * ops, vlib_buffer_t * b[],
150  u16 * nexts, vnet_crypto_op_chunk_t * chunks, int e)
151 {
152 
153  vnet_crypto_op_t *op = ops;
154  u32 n_fail, n_ops = vec_len (ops);
155 
156  if (n_ops == 0)
157  return;
158 
159  n_fail = n_ops - vnet_crypto_process_chained_ops (vm, op, chunks, n_ops);
160 
161  while (n_fail)
162  {
163  ASSERT (op - ops < n_ops);
164  if (op->status != VNET_CRYPTO_OP_STATUS_COMPLETED)
165  {
166  u32 err, bi = op->user_data;
167  if (op->status == VNET_CRYPTO_OP_STATUS_FAIL_BAD_HMAC)
168  err = e;
169  else
170  err = ESP_DECRYPT_ERROR_CRYPTO_ENGINE_ERROR;
171  b[bi]->error = node->errors[err];
172  nexts[bi] = ESP_DECRYPT_NEXT_DROP;
173  n_fail--;
174  }
175  op++;
176  }
177 }
178 
179 always_inline void
181  u16 tail)
182 {
183  vlib_buffer_t *before_last = b;
184 
185  if (last->current_length > tail)
186  {
187  last->current_length -= tail;
188  return;
189  }
190  ASSERT (b->flags & VLIB_BUFFER_NEXT_PRESENT);
191 
192  while (b->flags & VLIB_BUFFER_NEXT_PRESENT)
193  {
194  before_last = b;
195  b = vlib_get_buffer (vm, b->next_buffer);
196  }
197  before_last->current_length -= tail - last->current_length;
198  vlib_buffer_free_one (vm, before_last->next_buffer);
199  before_last->flags &= ~VLIB_BUFFER_NEXT_PRESENT;
200 }
201 
202 /* ICV is splitted in last two buffers so move it to the last buffer and
203  return pointer to it */
206  esp_decrypt_packet_data2_t * pd2, u16 icv_sz, u16 * dif)
207 {
208  vlib_buffer_t *before_last, *bp;
209  u16 last_sz = pd2->lb->current_length;
210  u16 first_sz = icv_sz - last_sz;
211 
212  bp = before_last = first;
213  while (bp->flags & VLIB_BUFFER_NEXT_PRESENT)
214  {
215  before_last = bp;
216  bp = vlib_get_buffer (vm, bp->next_buffer);
217  }
218 
219  u8 *lb_curr = vlib_buffer_get_current (pd2->lb);
220  memmove (lb_curr + first_sz, lb_curr, last_sz);
221  clib_memcpy_fast (lb_curr, vlib_buffer_get_tail (before_last) - first_sz,
222  first_sz);
223  before_last->current_length -= first_sz;
224  clib_memset (vlib_buffer_get_tail (before_last), 0, first_sz);
225  if (dif)
226  dif[0] = first_sz;
227  pd2->lb = before_last;
228  pd2->icv_removed = 1;
229  pd2->free_buffer_index = before_last->next_buffer;
230  before_last->flags &= ~VLIB_BUFFER_NEXT_PRESENT;
231  return lb_curr;
232 }
233 
237  u8 ** digest, u16 * len, vlib_buffer_t * b, u8 * payload)
238 {
239  if (!ipsec_sa_is_set_USE_ESN (sa))
240  return 0;
241 
242  /* shift ICV by 4 bytes to insert ESN */
243  u32 seq_hi = clib_host_to_net_u32 (sa->seq_hi);
244  u8 tmp[ESP_MAX_ICV_SIZE], sz = sizeof (sa->seq_hi);
245 
246  if (pd2->icv_removed)
247  {
248  u16 space_left = vlib_buffer_space_left_at_end (vm, pd2->lb);
249  if (space_left >= sz)
250  {
251  clib_memcpy_fast (vlib_buffer_get_tail (pd2->lb), &seq_hi, sz);
252  *data_len += sz;
253  }
254  else
255  return sz;
256 
257  len[0] = b->current_length;
258  }
259  else
260  {
261  clib_memcpy_fast (tmp, payload + len[0], ESP_MAX_ICV_SIZE);
262  clib_memcpy_fast (payload + len[0], &seq_hi, sz);
263  clib_memcpy_fast (payload + len[0] + sz, tmp, ESP_MAX_ICV_SIZE);
264  *data_len += sz;
265  *digest += sz;
266  }
267  return sz;
268 }
269 
272  esp_decrypt_packet_data2_t * pd2, u16 icv_sz,
273  ipsec_sa_t * sa, u8 * extra_esn, u32 * len)
274 {
275  u16 dif = 0;
276  u8 *digest = esp_move_icv (vm, first, pd2, icv_sz, &dif);
277  if (dif)
278  *len -= dif;
279 
280  if (ipsec_sa_is_set_USE_ESN (sa))
281  {
282  u8 sz = sizeof (sa->seq_hi);
283  u32 seq_hi = clib_host_to_net_u32 (sa->seq_hi);
284  u16 space_left = vlib_buffer_space_left_at_end (vm, pd2->lb);
285 
286  if (space_left >= sz)
287  {
288  clib_memcpy_fast (vlib_buffer_get_tail (pd2->lb), &seq_hi, sz);
289  *len += sz;
290  }
291  else
292  {
293  /* no space for ESN at the tail, use the next buffer
294  * (with ICV data) */
295  ASSERT (pd2->icv_removed);
297  clib_memcpy_fast (vlib_buffer_get_current (tmp) - sz, &seq_hi, sz);
298  extra_esn[0] = 1;
299  }
300  }
301  return digest;
302 }
303 
307  ipsec_sa_t * sa0, vlib_buffer_t * b, u8 icv_sz,
308  u8 * start_src, u32 start_len,
309  u8 ** digest, u16 * n_ch, u32 * integ_total_len)
310 {
313  u16 n_chunks = 1;
314  u32 total_len;
315  vec_add2 (ptd->chunks, ch, 1);
316  total_len = ch->len = start_len;
317  ch->src = start_src;
318 
319  while (1)
320  {
321  vec_add2 (ptd->chunks, ch, 1);
322  n_chunks += 1;
323  ch->src = vlib_buffer_get_current (cb);
324  if (pd2->lb == cb)
325  {
326  if (pd2->icv_removed)
327  ch->len = cb->current_length;
328  else
329  ch->len = cb->current_length - icv_sz;
330  if (ipsec_sa_is_set_USE_ESN (sa0))
331  {
332  u32 seq_hi = clib_host_to_net_u32 (sa0->seq_hi);
333  u8 tmp[ESP_MAX_ICV_SIZE], sz = sizeof (sa0->seq_hi);
334  u8 *esn;
335  vlib_buffer_t *tmp_b;
336  u16 space_left = vlib_buffer_space_left_at_end (vm, pd2->lb);
337  if (space_left < sz)
338  {
339  if (pd2->icv_removed)
340  {
341  /* use pre-data area from the last bufer
342  that was removed from the chain */
343  tmp_b = vlib_get_buffer (vm, pd2->free_buffer_index);
344  esn = tmp_b->data - sz;
345  }
346  else
347  {
348  /* no space, need to allocate new buffer */
349  u32 tmp_bi = 0;
350  if (vlib_buffer_alloc (vm, &tmp_bi, 1) != 1)
351  return -1;
352  tmp_b = vlib_get_buffer (vm, tmp_bi);
353  esn = tmp_b->data;
354  pd2->free_buffer_index = tmp_bi;
355  }
356  clib_memcpy_fast (esn, &seq_hi, sz);
357 
358  vec_add2 (ptd->chunks, ch, 1);
359  n_chunks += 1;
360  ch->src = esn;
361  ch->len = sz;
362  }
363  else
364  {
365  if (pd2->icv_removed)
366  {
368  (pd2->lb), &seq_hi, sz);
369  }
370  else
371  {
372  clib_memcpy_fast (tmp, *digest, ESP_MAX_ICV_SIZE);
373  clib_memcpy_fast (*digest, &seq_hi, sz);
374  clib_memcpy_fast (*digest + sz, tmp, ESP_MAX_ICV_SIZE);
375  *digest += sz;
376  }
377  ch->len += sz;
378  }
379  }
380  total_len += ch->len;
381  break;
382  }
383  else
384  total_len += ch->len = cb->current_length;
385 
386  if (!(cb->flags & VLIB_BUFFER_NEXT_PRESENT))
387  break;
388 
389  cb = vlib_get_buffer (vm, cb->next_buffer);
390  }
391 
392  if (n_ch)
393  *n_ch = n_chunks;
394  if (integ_total_len)
395  *integ_total_len = total_len;
396 
397  return 0;
398 }
399 
403  ipsec_sa_t * sa0, vlib_buffer_t * b, u8 icv_sz,
404  u8 * start, u32 start_len, u8 ** tag, u16 * n_ch)
405 {
407  vlib_buffer_t *cb = b;
408  u16 n_chunks = 1;
409  u32 total_len;
410  vec_add2 (ptd->chunks, ch, 1);
411  total_len = ch->len = start_len;
412  ch->src = ch->dst = start;
413  cb = vlib_get_buffer (vm, cb->next_buffer);
414  n_chunks = 1;
415 
416  while (1)
417  {
418  vec_add2 (ptd->chunks, ch, 1);
419  n_chunks += 1;
420  ch->src = ch->dst = vlib_buffer_get_current (cb);
421  if (pd2->lb == cb)
422  {
423  if (ipsec_sa_is_set_IS_AEAD (sa0))
424  {
425  if (pd2->lb->current_length < icv_sz)
426  {
427  u16 dif = 0;
428  *tag = esp_move_icv (vm, b, pd2, icv_sz, &dif);
429 
430  /* this chunk does not contain crypto data */
431  n_chunks -= 1;
432  /* and fix previous chunk's length as it might have
433  been changed */
434  ASSERT (n_chunks > 0);
435  if (pd2->lb == b)
436  {
437  total_len -= dif;
438  ch[-1].len -= dif;
439  }
440  else
441  {
442  total_len = total_len + pd2->lb->current_length -
443  ch[-1].len;
444  ch[-1].len = pd2->lb->current_length;
445  }
446  break;
447  }
448  else
449  *tag = vlib_buffer_get_tail (pd2->lb) - icv_sz;
450  }
451 
452  if (pd2->icv_removed)
453  total_len += ch->len = cb->current_length;
454  else
455  total_len += ch->len = cb->current_length - icv_sz;
456  }
457  else
458  total_len += ch->len = cb->current_length;
459 
460  if (!(cb->flags & VLIB_BUFFER_NEXT_PRESENT))
461  break;
462 
463  cb = vlib_get_buffer (vm, cb->next_buffer);
464  }
465 
466  if (n_ch)
467  *n_ch = n_chunks;
468 
469  return total_len;
470 }
471 
475  vnet_crypto_op_t *** crypto_ops,
476  vnet_crypto_op_t *** integ_ops,
477  vnet_crypto_op_t * op,
478  ipsec_sa_t * sa0, u8 * payload,
479  u16 len, u8 icv_sz, u8 iv_sz,
482  vlib_buffer_t * b, u16 * next, u32 index)
483 {
484  const u8 esp_sz = sizeof (esp_header_t);
485 
487  {
488  vnet_crypto_op_init (op, sa0->integ_op_id);
489  op->key_index = sa0->integ_key_index;
490  op->src = payload;
492  op->user_data = index;
493  op->digest = payload + len;
494  op->digest_len = icv_sz;
495  op->len = len;
496 
497  if (pd->is_chain)
498  {
499  /* buffer is chained */
500  op->len = pd->current_length;
501 
502  /* special case when ICV is splitted and needs to be reassembled
503  * first -> move it to the last buffer. Also take into account
504  * that ESN needs to be added after encrypted data and may or
505  * may not fit in the tail.*/
506  if (pd2->lb->current_length < icv_sz)
507  {
508  u8 extra_esn = 0;
509  op->digest =
510  esp_move_icv_esn (vm, b, pd2, icv_sz, sa0,
511  &extra_esn, &op->len);
512 
513  if (extra_esn)
514  {
515  /* esn is in the last buffer, that was unlinked from
516  * the chain */
517  op->len = b->current_length;
518  }
519  else
520  {
521  if (pd2->lb == b)
522  {
523  /* we now have a single buffer of crypto data, adjust
524  * the length (second buffer contains only ICV) */
525  *integ_ops = &ptd->integ_ops;
526  *crypto_ops = &ptd->crypto_ops;
527  len = b->current_length;
528  goto out;
529  }
530  }
531  }
532  else
533  op->digest = vlib_buffer_get_tail (pd2->lb) - icv_sz;
534 
536  op->chunk_index = vec_len (ptd->chunks);
537  if (esp_decrypt_chain_integ (vm, ptd, pd2, sa0, b, icv_sz,
538  payload, pd->current_length,
539  &op->digest, &op->n_chunks, 0) < 0)
540  {
541  b->error = node->errors[ESP_DECRYPT_ERROR_NO_BUFFERS];
542  next[0] = ESP_DECRYPT_NEXT_DROP;
543  return;
544  }
545  }
546  else
547  esp_insert_esn (vm, sa0, pd2, &op->len, &op->digest, &len, b,
548  payload);
549  out:
550  vec_add_aligned (*(integ_ops[0]), op, 1, CLIB_CACHE_LINE_BYTES);
551  }
552 
553  payload += esp_sz;
554  len -= esp_sz;
555 
557  {
559  op->key_index = sa0->crypto_key_index;
560  op->iv = payload;
561 
562  if (ipsec_sa_is_set_IS_AEAD (sa0))
563  {
564  esp_header_t *esp0;
565  esp_aead_t *aad;
566  u8 *scratch;
567 
568  /*
569  * construct the AAD and the nonce (Salt || IV) in a scratch
570  * space in front of the IP header.
571  */
572  scratch = payload - esp_sz;
573  esp0 = (esp_header_t *) (scratch);
574 
575  scratch -= (sizeof (*aad) + pd->hdr_sz);
576  op->aad = scratch;
577 
578  op->aad_len = esp_aad_fill (op->aad, esp0, sa0);
579 
580  /*
581  * we don't need to refer to the ESP header anymore so we
582  * can overwrite it with the salt and use the IV where it is
583  * to form the nonce = (Salt + IV)
584  */
585  op->iv -= sizeof (sa0->salt);
586  clib_memcpy_fast (op->iv, &sa0->salt, sizeof (sa0->salt));
587 
588  op->tag = payload + len;
589  op->tag_len = 16;
590  }
591  op->src = op->dst = payload += iv_sz;
592  op->len = len - iv_sz;
593  op->user_data = index;
594 
595  if (pd->is_chain && (pd2->lb != b))
596  {
597  /* buffer is chained */
599  op->chunk_index = vec_len (ptd->chunks);
600  esp_decrypt_chain_crypto (vm, ptd, pd2, sa0, b, icv_sz,
601  payload, len - pd->iv_sz + pd->icv_sz,
602  &op->tag, &op->n_chunks);
603  }
604 
605  vec_add_aligned (*(crypto_ops[0]), op, 1, CLIB_CACHE_LINE_BYTES);
606  }
607 }
608 
614  ipsec_sa_t * sa0, u8 * payload, u16 len,
615  u8 icv_sz, u8 iv_sz,
618  vlib_buffer_t * b, u16 * next,
619  u16 async_next)
620 {
621  const u8 esp_sz = sizeof (esp_header_t);
622  u32 current_protect_index = vnet_buffer (b)->ipsec.protect_index;
623  esp_decrypt_packet_data_t *async_pd = &(esp_post_data (b))->decrypt_data;
625  u8 *tag = payload + len, *iv = payload + esp_sz, *aad = 0;
626  u32 key_index;
627  u32 crypto_len, integ_len = 0;
628  i16 crypto_start_offset, integ_start_offset = 0;
629  u8 flags = 0;
630 
631  if (!ipsec_sa_is_set_IS_AEAD (sa0))
632  {
633  /* linked algs */
634  key_index = sa0->linked_key_index;
635  integ_start_offset = payload - b->data;
636  integ_len = len;
637 
638  if (pd->is_chain)
639  {
640  /* buffer is chained */
641  integ_len = pd->current_length;
642 
643  /* special case when ICV is splitted and needs to be reassembled
644  * first -> move it to the last buffer. Also take into account
645  * that ESN needs to be added after encrypted data and may or
646  * may not fit in the tail.*/
647  if (pd2->lb->current_length < icv_sz)
648  {
649  u8 extra_esn = 0;
650  tag = esp_move_icv_esn (vm, b, pd2, icv_sz, sa0,
651  &extra_esn, &integ_len);
652 
653  if (extra_esn)
654  {
655  /* esn is in the last buffer, that was unlinked from
656  * the chain */
657  integ_len = b->current_length;
658  }
659  else
660  {
661  if (pd2->lb == b)
662  {
663  /* we now have a single buffer of crypto data, adjust
664  * the length (second buffer contains only ICV) */
665  len = b->current_length;
666  goto out;
667  }
668  }
669  }
670  else
671  tag = vlib_buffer_get_tail (pd2->lb) - icv_sz;
672 
674  if (esp_decrypt_chain_integ (vm, ptd, pd2, sa0, b, icv_sz, payload,
675  pd->current_length, &tag,
676  0, &integ_len) < 0)
677  {
678  /* allocate buffer failed, will not add to frame and drop */
679  b->error = node->errors[ESP_DECRYPT_ERROR_NO_BUFFERS];
680  next[0] = ESP_DECRYPT_NEXT_DROP;
681  return 0;
682  }
683  }
684  else
685  esp_insert_esn (vm, sa0, pd2, &integ_len, &tag, &len, b, payload);
686  }
687  else
688  key_index = sa0->crypto_key_index;
689 
690 out:
691  /* crypto */
692  payload += esp_sz;
693  len -= esp_sz;
694  iv = payload;
695 
696  if (ipsec_sa_is_set_IS_AEAD (sa0))
697  {
698  esp_header_t *esp0;
699  u8 *scratch;
700 
701  /*
702  * construct the AAD and the nonce (Salt || IV) in a scratch
703  * space in front of the IP header.
704  */
705  scratch = payload - esp_sz;
706  esp0 = (esp_header_t *) (scratch);
707 
708  scratch -= (sizeof (esp_aead_t) + pd->hdr_sz);
709  aad = scratch;
710 
711  esp_aad_fill (aad, esp0, sa0);
712 
713  /*
714  * we don't need to refer to the ESP header anymore so we
715  * can overwrite it with the salt and use the IV where it is
716  * to form the nonce = (Salt + IV)
717  */
718  iv -= sizeof (sa0->salt);
719  clib_memcpy_fast (iv, &sa0->salt, sizeof (sa0->salt));
720 
721  tag = payload + len;
722  }
723 
724  crypto_start_offset = (payload += iv_sz) - b->data;
725  crypto_len = len - iv_sz;
726 
727  if (pd->is_chain && (pd2->lb != b))
728  {
729  /* buffer is chained */
731 
732  crypto_len = esp_decrypt_chain_crypto (vm, ptd, pd2, sa0, b, icv_sz,
733  payload,
734  len - pd->iv_sz + pd->icv_sz,
735  &tag, 0);
736  }
737 
738  *async_pd = *pd;
739  *async_pd2 = *pd2;
740  pd->protect_index = current_protect_index;
741  next[0] = ESP_DECRYPT_NEXT_PENDING;
742 
743  /* for AEAD integ_len - crypto_len will be negative, it is ok since it
744  * is ignored by the engine. */
745  return vnet_crypto_async_add_to_frame (vm, f, key_index, crypto_len,
746  integ_len - crypto_len,
747  crypto_start_offset,
748  integ_start_offset,
749  bi, async_next, iv, tag, aad, flags);
750 }
751 
756  u16 * next, int is_ip6, int is_tun, int is_async)
757 {
758  ipsec_main_t *im = &ipsec_main;
759  ipsec_sa_t *sa0 = vec_elt_at_index (im->sad, pd->sa_index);
760  vlib_buffer_t *lb = b;
761  const u8 esp_sz = sizeof (esp_header_t);
762  const u8 tun_flags = IPSEC_SA_FLAG_IS_TUNNEL | IPSEC_SA_FLAG_IS_TUNNEL_V6;
763  u8 pad_length = 0, next_header = 0;
764  u16 icv_sz;
765 
766  /*
767  * redo the anti-reply check
768  * in this frame say we have sequence numbers, s, s+1, s+1, s+1
769  * and s and s+1 are in the window. When we did the anti-replay
770  * check above we did so against the state of the window (W),
771  * after packet s-1. So each of the packets in the sequence will be
772  * accepted.
773  * This time s will be cheked against Ws-1, s+1 chceked against Ws
774  * (i.e. the window state is updated/advnaced)
775  * so this time the successive s+! packet will be dropped.
776  * This is a consequence of batching the decrypts. If the
777  * check-dcrypt-advance process was done for each packet it would
778  * be fine. But we batch the decrypts because it's much more efficient
779  * to do so in SW and if we offload to HW and the process is async.
780  *
781  * You're probably thinking, but this means an attacker can send the
782  * above sequence and cause VPP to perform decrpyts that will fail,
783  * and that's true. But if the attacker can determine s (a valid
784  * sequence number in the window) which is non-trivial, it can generate
785  * a sequence s, s+1, s+2, s+3, ... s+n and nothing will prevent any
786  * implementation, sequential or batching, from decrypting these.
787  */
788  if (ipsec_sa_anti_replay_check (sa0, pd->seq))
789  {
790  b->error = node->errors[ESP_DECRYPT_ERROR_REPLAY];
791  next[0] = ESP_DECRYPT_NEXT_DROP;
792  return;
793  }
794 
796 
797  if (pd->is_chain)
798  {
799  lb = pd2->lb;
800  icv_sz = pd2->icv_removed ? 0 : pd->icv_sz;
801  if (pd2->free_buffer_index)
802  {
804  lb->next_buffer = 0;
805  }
806  if (lb->current_length < sizeof (esp_footer_t) + icv_sz)
807  {
808  /* esp footer is either splitted in two buffers or in the before
809  * last buffer */
810 
811  vlib_buffer_t *before_last = b, *bp = b;
812  while (bp->flags & VLIB_BUFFER_NEXT_PRESENT)
813  {
814  before_last = bp;
815  bp = vlib_get_buffer (vm, bp->next_buffer);
816  }
817  u8 *bt = vlib_buffer_get_tail (before_last);
818 
819  if (lb->current_length == icv_sz)
820  {
821  esp_footer_t *f = (esp_footer_t *) (bt - sizeof (*f));
822  pad_length = f->pad_length;
823  next_header = f->next_header;
824  }
825  else
826  {
827  pad_length = (bt - 1)[0];
828  next_header = ((u8 *) vlib_buffer_get_current (lb))[0];
829  }
830  }
831  else
832  {
833  esp_footer_t *f =
834  (esp_footer_t *) (lb->data + lb->current_data +
835  lb->current_length - sizeof (esp_footer_t) -
836  icv_sz);
837  pad_length = f->pad_length;
838  next_header = f->next_header;
839  }
840  }
841  else
842  {
843  icv_sz = pd->icv_sz;
844  esp_footer_t *f =
845  (esp_footer_t *) (lb->data + lb->current_data + lb->current_length -
846  sizeof (esp_footer_t) - icv_sz);
847  pad_length = f->pad_length;
848  next_header = f->next_header;
849  }
850 
851  u16 adv = pd->iv_sz + esp_sz;
852  u16 tail = sizeof (esp_footer_t) + pad_length + icv_sz;
853  u16 tail_orig = sizeof (esp_footer_t) + pad_length + pd->icv_sz;
854  b->flags &= ~VLIB_BUFFER_TOTAL_LENGTH_VALID;
855 
856  if ((pd->flags & tun_flags) == 0 && !is_tun) /* transport mode */
857  {
858  u8 udp_sz = (is_ip6 == 0 && pd->flags & IPSEC_SA_FLAG_UDP_ENCAP) ?
859  sizeof (udp_header_t) : 0;
860  u16 ip_hdr_sz = pd->hdr_sz - udp_sz;
861  u8 *old_ip = b->data + pd->current_data - ip_hdr_sz - udp_sz;
862  u8 *ip = old_ip + adv + udp_sz;
863 
864  if (is_ip6 && ip_hdr_sz > 64)
865  memmove (ip, old_ip, ip_hdr_sz);
866  else
867  clib_memcpy_le64 (ip, old_ip, ip_hdr_sz);
868 
869  b->current_data = pd->current_data + adv - ip_hdr_sz;
870  b->current_length += ip_hdr_sz - adv;
871  esp_remove_tail (vm, b, lb, tail);
872 
873  if (is_ip6)
874  {
875  ip6_header_t *ip6 = (ip6_header_t *) ip;
876  u16 len = clib_net_to_host_u16 (ip6->payload_length);
877  len -= adv + tail_orig;
878  ip6->payload_length = clib_host_to_net_u16 (len);
879  ip6->protocol = next_header;
880  next[0] = ESP_DECRYPT_NEXT_IP6_INPUT;
881  }
882  else
883  {
884  ip4_header_t *ip4 = (ip4_header_t *) ip;
885  ip_csum_t sum = ip4->checksum;
886  u16 len = clib_net_to_host_u16 (ip4->length);
887  len = clib_host_to_net_u16 (len - adv - tail_orig - udp_sz);
888  sum = ip_csum_update (sum, ip4->protocol, next_header,
890  sum = ip_csum_update (sum, ip4->length, len, ip4_header_t, length);
891  ip4->checksum = ip_csum_fold (sum);
892  ip4->protocol = next_header;
893  ip4->length = len;
894  next[0] = ESP_DECRYPT_NEXT_IP4_INPUT;
895  }
896  }
897  else
898  {
899  if (PREDICT_TRUE (next_header == IP_PROTOCOL_IP_IN_IP))
900  {
901  next[0] = ESP_DECRYPT_NEXT_IP4_INPUT;
902  b->current_data = pd->current_data + adv;
903  b->current_length = pd->current_length - adv;
904  esp_remove_tail (vm, b, lb, tail);
905  }
906  else if (next_header == IP_PROTOCOL_IPV6)
907  {
908  next[0] = ESP_DECRYPT_NEXT_IP6_INPUT;
909  b->current_data = pd->current_data + adv;
910  b->current_length = pd->current_length - adv;
911  esp_remove_tail (vm, b, lb, tail);
912  }
913  else
914  {
915  if (is_tun && next_header == IP_PROTOCOL_GRE)
916  {
917  gre_header_t *gre;
918 
919  b->current_data = pd->current_data + adv;
920  b->current_length = pd->current_length - adv - tail;
921 
922  gre = vlib_buffer_get_current (b);
923 
924  vlib_buffer_advance (b, sizeof (*gre));
925 
926  switch (clib_net_to_host_u16 (gre->protocol))
927  {
928  case GRE_PROTOCOL_teb:
929  vnet_update_l2_len (b);
930  next[0] = ESP_DECRYPT_NEXT_L2_INPUT;
931  break;
932  case GRE_PROTOCOL_ip4:
933  next[0] = ESP_DECRYPT_NEXT_IP4_INPUT;
934  break;
935  case GRE_PROTOCOL_ip6:
936  next[0] = ESP_DECRYPT_NEXT_IP6_INPUT;
937  break;
938  default:
939  b->error = node->errors[ESP_DECRYPT_ERROR_UNSUP_PAYLOAD];
940  next[0] = ESP_DECRYPT_NEXT_DROP;
941  break;
942  }
943  }
944  else
945  {
946  next[0] = ESP_DECRYPT_NEXT_DROP;
947  b->error = node->errors[ESP_DECRYPT_ERROR_UNSUP_PAYLOAD];
948  return;
949  }
950  }
951  if (is_tun)
952  {
953  if (ipsec_sa_is_set_IS_PROTECT (sa0))
954  {
955  /*
956  * There are two encap possibilities
957  * 1) the tunnel and ths SA are prodiving encap, i.e. it's
958  * MAC | SA-IP | TUN-IP | ESP | PAYLOAD
959  * implying the SA is in tunnel mode (on a tunnel interface)
960  * 2) only the tunnel provides encap
961  * MAC | TUN-IP | ESP | PAYLOAD
962  * implying the SA is in transport mode.
963  *
964  * For 2) we need only strip the tunnel encap and we're good.
965  * since the tunnel and crypto ecnap (int the tun=protect
966  * object) are the same and we verified above that these match
967  * for 1) we need to strip the SA-IP outer headers, to
968  * reveal the tunnel IP and then check that this matches
969  * the configured tunnel.
970  */
971  const ipsec_tun_protect_t *itp;
972 
973  if (is_async)
975  else
976  itp =
978  ipsec.protect_index);
979 
980  if (PREDICT_TRUE (next_header == IP_PROTOCOL_IP_IN_IP))
981  {
982  const ip4_header_t *ip4;
983 
984  ip4 = vlib_buffer_get_current (b);
985 
987  &ip4->dst_address) ||
989  &ip4->src_address))
990  {
991  next[0] = ESP_DECRYPT_NEXT_DROP;
992  b->error = node->errors[ESP_DECRYPT_ERROR_TUN_NO_PROTO];
993  }
994  }
995  else if (next_header == IP_PROTOCOL_IPV6)
996  {
997  const ip6_header_t *ip6;
998 
999  ip6 = vlib_buffer_get_current (b);
1000 
1001  if (!ip46_address_is_equal_v6 (&itp->itp_tun.src,
1002  &ip6->dst_address) ||
1004  &ip6->src_address))
1005  {
1006  next[0] = ESP_DECRYPT_NEXT_DROP;
1007  b->error = node->errors[ESP_DECRYPT_ERROR_TUN_NO_PROTO];
1008  }
1009  }
1010  }
1011  }
1012  }
1013 }
1014 
1015 /* when submitting a frame is failed, drop all buffers in the frame */
1018  vlib_buffer_t ** b, u16 * next)
1019 {
1020  u32 n_drop = f->n_elts;
1021  while (--n_drop)
1022  {
1023  (b - n_drop)[0]->error = ESP_DECRYPT_ERROR_CRYPTO_ENGINE_ERROR;
1024  (next - n_drop)[0] = ESP_DECRYPT_NEXT_DROP;
1025  }
1027 }
1028 
1031  vlib_node_runtime_t * node, vlib_frame_t * from_frame,
1032  int is_ip6, int is_tun, u16 async_next)
1033 {
1034  ipsec_main_t *im = &ipsec_main;
1035  u32 thread_index = vm->thread_index;
1036  u16 len;
1037  ipsec_per_thread_data_t *ptd = vec_elt_at_index (im->ptd, thread_index);
1038  u32 *from = vlib_frame_vector_args (from_frame);
1039  u32 n_left = from_frame->n_vectors;
1040  vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
1041  u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
1042  esp_decrypt_packet_data_t pkt_data[VLIB_FRAME_SIZE], *pd = pkt_data;
1043  esp_decrypt_packet_data2_t pkt_data2[VLIB_FRAME_SIZE], *pd2 = pkt_data2;
1044  esp_decrypt_packet_data_t cpd = { };
1045  u32 current_sa_index = ~0, current_sa_bytes = 0, current_sa_pkts = 0;
1046  const u8 esp_sz = sizeof (esp_header_t);
1047  ipsec_sa_t *sa0 = 0;
1048  vnet_crypto_op_t _op, *op = &_op;
1049  vnet_crypto_op_t **crypto_ops = &ptd->crypto_ops;
1050  vnet_crypto_op_t **integ_ops = &ptd->integ_ops;
1051  vnet_crypto_async_frame_t *async_frame = 0;
1052  int is_async = im->async_mode;
1053  vnet_crypto_async_op_id_t last_async_op = ~0;
1054 
1055  vlib_get_buffers (vm, from, b, n_left);
1056  if (!is_async)
1057  {
1059  vec_reset_length (ptd->integ_ops);
1062  }
1063  vec_reset_length (ptd->chunks);
1064  clib_memset_u16 (nexts, -1, n_left);
1065 
1066  while (n_left > 0)
1067  {
1068  u8 *payload;
1069 
1070  if (n_left > 2)
1071  {
1072  u8 *p;
1073  vlib_prefetch_buffer_header (b[2], LOAD);
1074  p = vlib_buffer_get_current (b[1]);
1076  p -= CLIB_CACHE_LINE_BYTES;
1078  }
1079 
1080  u32 n_bufs = vlib_buffer_chain_linearize (vm, b[0]);
1081  if (n_bufs == 0)
1082  {
1083  b[0]->error = node->errors[ESP_DECRYPT_ERROR_NO_BUFFERS];
1084  next[0] = ESP_DECRYPT_NEXT_DROP;
1085  goto next;
1086  }
1087 
1088  if (vnet_buffer (b[0])->ipsec.sad_index != current_sa_index)
1089  {
1090  if (current_sa_pkts)
1092  current_sa_index,
1093  current_sa_pkts,
1094  current_sa_bytes);
1095  current_sa_bytes = current_sa_pkts = 0;
1096 
1097  current_sa_index = vnet_buffer (b[0])->ipsec.sad_index;
1098  sa0 = pool_elt_at_index (im->sad, current_sa_index);
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 
1104  /* submit frame when op_id is different then the old one */
1105  if (is_async && last_async_op != sa0->crypto_async_dec_op_id)
1106  {
1107  if (async_frame && async_frame->n_elts)
1108  {
1109  if (vnet_crypto_async_submit_open_frame (vm, async_frame))
1110  esp_async_recycle_failed_submit (async_frame, b, next);
1111  }
1112  async_frame =
1114  last_async_op = sa0->crypto_async_dec_op_id;
1115  }
1116  }
1117 
1118  if (PREDICT_FALSE (~0 == sa0->decrypt_thread_index))
1119  {
1120  /* this is the first packet to use this SA, claim the SA
1121  * for this thread. this could happen simultaneously on
1122  * another thread */
1124  ipsec_sa_assign_thread (thread_index));
1125  }
1126 
1127  if (PREDICT_TRUE (thread_index != sa0->decrypt_thread_index))
1128  {
1129  next[0] = ESP_DECRYPT_NEXT_HANDOFF;
1130  goto next;
1131  }
1132 
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);
1139  pd->is_chain = 0;
1140  pd2->lb = b[0];
1141  pd2->free_buffer_index = 0;
1142  pd2->icv_removed = 0;
1143 
1144  if (n_bufs > 1)
1145  {
1146  pd->is_chain = 1;
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);
1150 
1151  crypto_ops = &ptd->chained_crypto_ops;
1152  integ_ops = &ptd->chained_integ_ops;
1153  }
1154 
1155  pd->current_length = b[0]->current_length;
1156 
1157  /* anti-reply check */
1158  if (ipsec_sa_anti_replay_check (sa0, pd->seq))
1159  {
1160  b[0]->error = node->errors[ESP_DECRYPT_ERROR_REPLAY];
1161  next[0] = ESP_DECRYPT_NEXT_DROP;
1162  goto next;
1163  }
1164 
1165  if (pd->current_length < cpd.icv_sz + esp_sz + cpd.iv_sz)
1166  {
1167  b[0]->error = node->errors[ESP_DECRYPT_ERROR_RUNT];
1168  next[0] = ESP_DECRYPT_NEXT_DROP;
1169  goto next;
1170  }
1171 
1172  len = pd->current_length - cpd.icv_sz;
1173  current_sa_pkts += 1;
1174  current_sa_bytes += vlib_buffer_length_in_chain (vm, b[0]);
1175 
1176  if (is_async)
1177  {
1178  int ret = esp_decrypt_prepare_async_frame (vm, node, ptd,
1179  &async_frame,
1180  sa0, payload, len,
1181  cpd.icv_sz,
1182  cpd.iv_sz,
1183  pd, pd2,
1184  from[b - bufs],
1185  b[0], next, async_next);
1186  if (PREDICT_FALSE (ret < 0))
1187  {
1188  esp_async_recycle_failed_submit (async_frame, b, next);
1189  goto next;
1190  }
1191  }
1192  else
1193  esp_decrypt_prepare_sync_op (vm, node, ptd, &crypto_ops, &integ_ops,
1194  op, sa0, payload, len, cpd.icv_sz,
1195  cpd.iv_sz, pd, pd2, b[0], next,
1196  b - bufs);
1197  /* next */
1198  next:
1199  n_left -= 1;
1200  next += 1;
1201  pd += 1;
1202  pd2 += 1;
1203  b += 1;
1204  }
1205 
1206  if (PREDICT_TRUE (~0 != current_sa_index))
1208  current_sa_index, current_sa_pkts,
1209  current_sa_bytes);
1210 
1211  if (is_async)
1212  {
1213  if (async_frame && async_frame->n_elts)
1214  {
1215  if (vnet_crypto_async_submit_open_frame (vm, async_frame) < 0)
1216  esp_async_recycle_failed_submit (async_frame, b, next);
1217  }
1218 
1219  /* no post process in async */
1220  n_left = from_frame->n_vectors;
1222  ESP_DECRYPT_ERROR_RX_PKTS, n_left);
1223  vlib_buffer_enqueue_to_next (vm, node, from, nexts, n_left);
1224 
1225  return n_left;
1226  }
1227  else
1228  {
1229  esp_process_ops (vm, node, ptd->integ_ops, bufs, nexts,
1230  ESP_DECRYPT_ERROR_INTEG_ERROR);
1231  esp_process_chained_ops (vm, node, ptd->chained_integ_ops, bufs, nexts,
1232  ptd->chunks, ESP_DECRYPT_ERROR_INTEG_ERROR);
1233 
1234  esp_process_ops (vm, node, ptd->crypto_ops, bufs, nexts,
1235  ESP_DECRYPT_ERROR_DECRYPTION_FAILED);
1236  esp_process_chained_ops (vm, node, ptd->chained_crypto_ops, bufs, nexts,
1237  ptd->chunks,
1238  ESP_DECRYPT_ERROR_DECRYPTION_FAILED);
1239  }
1240 
1241  /* Post decryption ronud - adjust packet data start and length and next
1242  node */
1243 
1244  n_left = from_frame->n_vectors;
1245  next = nexts;
1246  pd = pkt_data;
1247  pd2 = pkt_data2;
1248  b = bufs;
1249 
1250  while (n_left)
1251  {
1252  if (n_left >= 2)
1253  {
1254  void *data = b[1]->data + pd[1].current_data;
1255 
1256  /* buffer metadata */
1257  vlib_prefetch_buffer_header (b[1], LOAD);
1258 
1259  /* esp_footer_t */
1260  CLIB_PREFETCH (data + pd[1].current_length - pd[1].icv_sz - 2,
1261  CLIB_CACHE_LINE_BYTES, LOAD);
1262 
1263  /* packet headers */
1265  CLIB_CACHE_LINE_BYTES * 2, LOAD);
1266  }
1267 
1268  /* save the sa_index as GRE_teb post_crypto changes L2 opaque */
1269  if (PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_IS_TRACED))
1270  current_sa_index = vnet_buffer (b[0])->ipsec.sad_index;
1271 
1272  if (next[0] >= ESP_DECRYPT_N_NEXT)
1273  esp_decrypt_post_crypto (vm, node, pd, pd2, b[0], next, is_ip6,
1274  is_tun, 0);
1275 
1276  /* trace: */
1277  if (PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_IS_TRACED))
1278  {
1279  esp_decrypt_trace_t *tr;
1280  tr = vlib_add_trace (vm, node, b[0], sizeof (*tr));
1281  sa0 = pool_elt_at_index (im->sad, current_sa_index);
1282  tr->crypto_alg = sa0->crypto_alg;
1283  tr->integ_alg = sa0->integ_alg;
1284  tr->seq = pd->seq;
1285  tr->sa_seq = sa0->last_seq;
1286  tr->sa_seq_hi = sa0->seq_hi;
1287  }
1288 
1289  /* next */
1290  n_left -= 1;
1291  next += 1;
1292  pd += 1;
1293  pd2 += 1;
1294  b += 1;
1295  }
1296 
1297  n_left = from_frame->n_vectors;
1299  ESP_DECRYPT_ERROR_RX_PKTS, n_left);
1300 
1301  vlib_buffer_enqueue_to_next (vm, node, from, nexts, n_left);
1302 
1303  return n_left;
1304 }
1305 
1309  vlib_frame_t * from_frame, int is_ip6, int is_tun)
1310 {
1311  ipsec_main_t *im = &ipsec_main;
1312  u32 *from = vlib_frame_vector_args (from_frame);
1313  u32 n_left = from_frame->n_vectors;
1314  vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
1315  u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
1316  vlib_get_buffers (vm, from, b, n_left);
1317 
1318  while (n_left > 0)
1319  {
1320  esp_decrypt_packet_data_t *pd = &(esp_post_data (b[0]))->decrypt_data;
1321 
1322  if (n_left > 2)
1323  {
1324  vlib_prefetch_buffer_header (b[2], LOAD);
1325  vlib_prefetch_buffer_header (b[1], LOAD);
1326  }
1327 
1328  if (!pd->is_chain)
1329  esp_decrypt_post_crypto (vm, node, pd, 0, b[0], next, is_ip6, is_tun,
1330  1);
1331  else
1332  {
1334  esp_decrypt_post_crypto (vm, node, pd, pd2, b[0], next, is_ip6,
1335  is_tun, 1);
1336  }
1337 
1338  /*trace: */
1339  if (PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_IS_TRACED))
1340  {
1341  ipsec_sa_t *sa0 = pool_elt_at_index (im->sad, pd->sa_index);
1342  esp_decrypt_trace_t *tr;
1343  esp_decrypt_packet_data_t *async_pd =
1344  &(esp_post_data (b[0]))->decrypt_data;
1345  tr = vlib_add_trace (vm, node, b[0], sizeof (*tr));
1346  sa0 = pool_elt_at_index (im->sad, async_pd->sa_index);
1347 
1348  tr->crypto_alg = sa0->crypto_alg;
1349  tr->integ_alg = sa0->integ_alg;
1350  tr->seq = pd->seq;
1351  tr->sa_seq = sa0->last_seq;
1352  tr->sa_seq_hi = sa0->seq_hi;
1353  }
1354 
1355  n_left--;
1356  next++;
1357  b++;
1358  }
1359 
1360  n_left = from_frame->n_vectors;
1362  ESP_DECRYPT_ERROR_RX_POST_PKTS, n_left);
1363 
1364  vlib_buffer_enqueue_to_next (vm, node, from, nexts, n_left);
1365 
1366  return n_left;
1367 }
1368 
1371  vlib_frame_t * from_frame)
1372 {
1373  return esp_decrypt_inline (vm, node, from_frame, 0, 0,
1375 }
1376 
1379  vlib_frame_t * from_frame)
1380 {
1381  return esp_decrypt_post_inline (vm, node, from_frame, 0, 0);
1382 }
1383 
1386  vlib_frame_t * from_frame)
1387 {
1388  return esp_decrypt_inline (vm, node, from_frame, 0, 1,
1390 }
1391 
1394  vlib_frame_t * from_frame)
1395 {
1396  return esp_decrypt_post_inline (vm, node, from_frame, 0, 1);
1397 }
1398 
1401  vlib_frame_t * from_frame)
1402 {
1403  return esp_decrypt_inline (vm, node, from_frame, 1, 0,
1405 }
1406 
1409  vlib_frame_t * from_frame)
1410 {
1411  return esp_decrypt_post_inline (vm, node, from_frame, 1, 0);
1412 }
1413 
1416  vlib_frame_t * from_frame)
1417 {
1418  return esp_decrypt_inline (vm, node, from_frame, 1, 1,
1420 }
1421 
1424  vlib_frame_t * from_frame)
1425 {
1426  return esp_decrypt_post_inline (vm, node, from_frame, 1, 1);
1427 }
1428 
1431  vlib_frame_t * from_frame)
1432 {
1433  return from_frame->n_vectors;
1434 }
1435 
1436 /* *INDENT-OFF* */
1438  .name = "esp-decrypt-pending",
1439  .vector_size = sizeof (u32),
1441 
1442  .n_next_nodes = 0
1443 };
1444 /* *INDENT-ON* */
1445 
1446 /* *INDENT-OFF* */
1448  .name = "esp4-decrypt",
1449  .vector_size = sizeof (u32),
1450  .format_trace = format_esp_decrypt_trace,
1452 
1453  .n_errors = ARRAY_LEN(esp_decrypt_error_strings),
1454  .error_strings = esp_decrypt_error_strings,
1455 
1456  .n_next_nodes = ESP_DECRYPT_N_NEXT,
1457  .next_nodes = {
1458  [ESP_DECRYPT_NEXT_DROP] = "ip4-drop",
1459  [ESP_DECRYPT_NEXT_IP4_INPUT] = "ip4-input-no-checksum",
1460  [ESP_DECRYPT_NEXT_IP6_INPUT] = "ip6-input",
1461  [ESP_DECRYPT_NEXT_L2_INPUT] = "l2-input",
1462  [ESP_DECRYPT_NEXT_HANDOFF] = "esp4-decrypt-handoff",
1463  [ESP_DECRYPT_NEXT_PENDING] = "esp-decrypt-pending"
1464  },
1465 };
1466 
1468  .name = "esp4-decrypt-post",
1469  .vector_size = sizeof (u32),
1470  .format_trace = format_esp_decrypt_trace,
1472 
1473  .n_errors = ARRAY_LEN(esp_decrypt_error_strings),
1474  .error_strings = esp_decrypt_error_strings,
1475 
1476  .sibling_of = "esp4-decrypt",
1477 };
1478 
1480  .name = "esp6-decrypt",
1481  .vector_size = sizeof (u32),
1482  .format_trace = format_esp_decrypt_trace,
1484 
1485  .n_errors = ARRAY_LEN(esp_decrypt_error_strings),
1486  .error_strings = esp_decrypt_error_strings,
1487 
1488  .n_next_nodes = ESP_DECRYPT_N_NEXT,
1489  .next_nodes = {
1490  [ESP_DECRYPT_NEXT_DROP] = "ip6-drop",
1491  [ESP_DECRYPT_NEXT_IP4_INPUT] = "ip4-input-no-checksum",
1492  [ESP_DECRYPT_NEXT_IP6_INPUT] = "ip6-input",
1493  [ESP_DECRYPT_NEXT_L2_INPUT] = "l2-input",
1494  [ESP_DECRYPT_NEXT_HANDOFF]= "esp6-decrypt-handoff",
1495  [ESP_DECRYPT_NEXT_PENDING] = "esp-decrypt-pending"
1496  },
1497 };
1498 
1500  .name = "esp6-decrypt-post",
1501  .vector_size = sizeof (u32),
1502  .format_trace = format_esp_decrypt_trace,
1504 
1505  .n_errors = ARRAY_LEN(esp_decrypt_error_strings),
1506  .error_strings = esp_decrypt_error_strings,
1507 
1508  .sibling_of = "esp6-decrypt",
1509 };
1510 
1512  .name = "esp4-decrypt-tun",
1513  .vector_size = sizeof (u32),
1514  .format_trace = format_esp_decrypt_trace,
1516  .n_errors = ARRAY_LEN(esp_decrypt_error_strings),
1517  .error_strings = esp_decrypt_error_strings,
1518  .n_next_nodes = ESP_DECRYPT_N_NEXT,
1519  .next_nodes = {
1520  [ESP_DECRYPT_NEXT_DROP] = "ip4-drop",
1521  [ESP_DECRYPT_NEXT_IP4_INPUT] = "ip4-input-no-checksum",
1522  [ESP_DECRYPT_NEXT_IP6_INPUT] = "ip6-input",
1523  [ESP_DECRYPT_NEXT_L2_INPUT] = "l2-input",
1524  [ESP_DECRYPT_NEXT_HANDOFF] = "esp4-decrypt-tun-handoff",
1525  [ESP_DECRYPT_NEXT_PENDING] = "esp-decrypt-pending"
1526  },
1527 };
1528 
1530  .name = "esp4-decrypt-tun-post",
1531  .vector_size = sizeof (u32),
1532  .format_trace = format_esp_decrypt_trace,
1534 
1535  .n_errors = ARRAY_LEN(esp_decrypt_error_strings),
1536  .error_strings = esp_decrypt_error_strings,
1537 
1538  .sibling_of = "esp4-decrypt-tun",
1539 };
1540 
1542  .name = "esp6-decrypt-tun",
1543  .vector_size = sizeof (u32),
1544  .format_trace = format_esp_decrypt_trace,
1546  .n_errors = ARRAY_LEN(esp_decrypt_error_strings),
1547  .error_strings = esp_decrypt_error_strings,
1548  .n_next_nodes = ESP_DECRYPT_N_NEXT,
1549  .next_nodes = {
1550  [ESP_DECRYPT_NEXT_DROP] = "ip6-drop",
1551  [ESP_DECRYPT_NEXT_IP4_INPUT] = "ip4-input-no-checksum",
1552  [ESP_DECRYPT_NEXT_IP6_INPUT] = "ip6-input",
1553  [ESP_DECRYPT_NEXT_L2_INPUT] = "l2-input",
1554  [ESP_DECRYPT_NEXT_HANDOFF]= "esp6-decrypt-tun-handoff",
1555  [ESP_DECRYPT_NEXT_PENDING] = "esp-decrypt-pending"
1556  },
1557 };
1558 
1560  .name = "esp6-decrypt-tun-post",
1561  .vector_size = sizeof (u32),
1562  .format_trace = format_esp_decrypt_trace,
1564 
1565  .n_errors = ARRAY_LEN(esp_decrypt_error_strings),
1566  .error_strings = esp_decrypt_error_strings,
1567 
1568  .sibling_of = "esp6-decrypt-tun",
1569 };
1570 /* *INDENT-ON* */
1571 
1572 /*
1573  * fd.io coding-style-patch-verification: ON
1574  *
1575  * Local Variables:
1576  * eval: (c-set-style "gnu")
1577  * End:
1578  */
u32 vnet_crypto_process_ops(vlib_main_t *vm, vnet_crypto_op_t ops[], u32 n_ops)
Definition: crypto.c:99
u32 flags
buffer flags: VLIB_BUFFER_FREE_LIST_INDEX_MASK: bits used to store free list index, VLIB_BUFFER_IS_TRACED: trace this buffer.
Definition: buffer.h:124
static_always_inline void esp_process_ops(vlib_main_t *vm, vlib_node_runtime_t *node, vnet_crypto_op_t *ops, vlib_buffer_t *b[], u16 *nexts, int e)
Definition: esp_decrypt.c:117
u8 * format_ipsec_integ_alg(u8 *s, va_list *args)
Definition: ipsec_format.c:110
#define esp_post_data(b)
Definition: esp.h:179
static_always_inline int vnet_crypto_async_add_to_frame(vlib_main_t *vm, vnet_crypto_async_frame_t **frame, u32 key_index, u32 crypto_len, i16 integ_len_adj, i16 crypto_start_offset, u16 integ_start_offset, u32 buffer_index, u16 next_node, u8 *iv, u8 *tag, u8 *aad, u8 flags)
Definition: crypto.h:597
static u8 * vlib_buffer_get_tail(vlib_buffer_t *b)
Get pointer to the end of buffer&#39;s data.
Definition: buffer.h:310
static u8 * format_esp_decrypt_trace(u8 *s, va_list *args)
Definition: esp_decrypt.c:100
The post data structure to for esp_encrypt/decrypt_inline to write to vib_buffer_t opaque unused fiel...
Definition: esp.h:136
#define CLIB_UNUSED(x)
Definition: clib.h:87
static_always_inline void vnet_crypto_async_reset_frame(vnet_crypto_async_frame_t *f)
Definition: crypto.h:641
ipsec_per_thread_data_t * ptd
Definition: ipsec.h:185
vnet_crypto_op_t * integ_ops
Definition: ipsec.h:96
esp_decrypt_post_next_t
Definition: esp_decrypt.c:53
vl_api_wireguard_peer_flags_t flags
Definition: wireguard.api:103
static char * esp_decrypt_error_strings[]
Definition: esp_decrypt.c:83
static void vlib_increment_combined_counter(vlib_combined_counter_main_t *cm, u32 thread_index, u32 index, u64 n_packets, u64 n_bytes)
Increment a combined counter.
Definition: counter.h:220
ip4_address_t src_address
Definition: ip4_packet.h:125
static u16 esp_aad_fill(u8 *data, const esp_header_t *esp, const ipsec_sa_t *sa)
Definition: esp.h:109
#define PREDICT_TRUE(x)
Definition: clib.h:121
ipsec_integ_alg_t
Definition: ipsec_sa.h:59
i16 current_data
signed offset in data[], pre_data[] that we are currently processing.
Definition: buffer.h:110
#define clib_memcpy_fast(a, b, c)
Definition: string.h:81
clib_memset(h->entries, 0, sizeof(h->entries[0]) *entries)
#define VNET_CRYPTO_OP_FLAG_CHAINED_BUFFERS
Definition: crypto.h:239
static u32 ipsec_sa_assign_thread(u32 thread_id)
Definition: ipsec_sa.h:490
static_always_inline u8 * esp_move_icv(vlib_main_t *vm, vlib_buffer_t *first, esp_decrypt_packet_data2_t *pd2, u16 icv_sz, u16 *dif)
Definition: esp_decrypt.c:205
u32 esp6_post_next
Definition: esp.h:195
ipsec_integ_alg_t integ_alg
Definition: ipsec_sa.h:171
static_always_inline int esp_decrypt_prepare_async_frame(vlib_main_t *vm, vlib_node_runtime_t *node, ipsec_per_thread_data_t *ptd, vnet_crypto_async_frame_t **f, ipsec_sa_t *sa0, u8 *payload, u16 len, u8 icv_sz, u8 iv_sz, esp_decrypt_packet_data_t *pd, esp_decrypt_packet_data2_t *pd2, u32 bi, vlib_buffer_t *b, u16 *next, u16 async_next)
Definition: esp_decrypt.c:610
u32 thread_index
Definition: main.h:249
u16 current_length
Nbytes between current data and the end of this buffer.
Definition: buffer.h:113
struct esp_aead_t_ esp_aead_t
AES GCM Additional Authentication data.
vnet_crypto_op_t * crypto_ops
Definition: ipsec.h:95
ipsec_crypto_alg_t crypto_alg
Definition: esp_decrypt.c:73
static heap_elt_t * last(heap_header_t *h)
Definition: heap.c:53
AES GCM Additional Authentication data.
Definition: esp.h:64
#define vec_add2(V, P, N)
Add N elements to end of vector V, return pointer to new elements in P.
Definition: vec.h:630
uword ip_csum_t
Definition: ip_packet.h:244
vlib_main_t * vm
Definition: in2out_ed.c:1582
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:424
#define VLIB_NODE_FN(node)
Definition: node.h:202
vnet_crypto_op_chunk_t * chunks
Definition: ipsec.h:99
vlib_error_t * errors
Vector of errors for this node.
Definition: node.h:469
static_always_inline void esp_async_recycle_failed_submit(vnet_crypto_async_frame_t *f, vlib_buffer_t **b, u16 *next)
Definition: esp_decrypt.c:1017
vnet_crypto_op_id_t integ_op_id
Definition: ipsec_sa.h:139
static uword vlib_buffer_length_in_chain(vlib_main_t *vm, vlib_buffer_t *b)
Get length in bytes of the buffer chain.
Definition: buffer_funcs.h:402
static_always_inline int ip46_address_is_equal_v6(const ip46_address_t *ip46, const ip6_address_t *ip6)
Definition: ip46_address.h:115
vlib_node_registration_t esp_decrypt_pending_node
(constructor) VLIB_REGISTER_NODE (esp_decrypt_pending_node)
Definition: esp_decrypt.c:1437
ip6_address_t src_address
Definition: ip6_packet.h:310
unsigned char u8
Definition: types.h:56
u8 data[128]
Definition: ipsec_types.api:89
#define vec_reset_length(v)
Reset vector length to zero NULL-pointer tolerant.
u32 seq_hi
Definition: ipsec_sa.h:122
static uword esp_decrypt_inline(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame, int is_ip6, int is_tun, u16 async_next)
Definition: esp_decrypt.c:1030
vnet_crypto_key_index_t linked_key_index
Definition: ipsec_sa.h:146
vnet_crypto_key_index_t crypto_key_index
Definition: ipsec_sa.h:128
vl_api_ip_proto_t protocol
Definition: lb_types.api:71
static_always_inline u32 esp_decrypt_chain_crypto(vlib_main_t *vm, ipsec_per_thread_data_t *ptd, esp_decrypt_packet_data2_t *pd2, ipsec_sa_t *sa0, vlib_buffer_t *b, u8 icv_sz, u8 *start, u32 start_len, u8 **tag, u16 *n_ch)
Definition: esp_decrypt.c:401
vlib_node_registration_t esp6_decrypt_tun_node
(constructor) VLIB_REGISTER_NODE (esp6_decrypt_tun_node)
Definition: esp_decrypt.c:1541
#define static_always_inline
Definition: clib.h:108
ip46_address_t src
Definition: ipsec_tun.h:67
ipsec_main_t ipsec_main
Definition: ipsec.c:28
esp_decrypt_next_t
Definition: esp_decrypt.c:35
vl_api_ip6_address_t ip6
Definition: one.api:424
ip4_address_t dst_address
Definition: ip4_packet.h:125
u32 esp4_tun_post_next
Definition: esp.h:196
#define vlib_prefetch_buffer_header(b, type)
Prefetch buffer metadata.
Definition: buffer.h:203
vlib_node_registration_t esp4_decrypt_tun_post_node
(constructor) VLIB_REGISTER_NODE (esp4_decrypt_tun_post_node)
Definition: esp_decrypt.c:1529
static_always_inline void vnet_crypto_op_init(vnet_crypto_op_t *op, vnet_crypto_op_id_t type)
Definition: crypto.h:496
#define vec_elt_at_index(v, i)
Get vector value at index i checking that i is in bounds.
ipsec_ep_t itp_tun
Definition: ipsec_tun.h:90
vlib_node_registration_t esp4_decrypt_tun_node
(constructor) VLIB_REGISTER_NODE (esp4_decrypt_tun_node)
Definition: esp_decrypt.c:1511
u8 * format_ipsec_crypto_alg(u8 *s, va_list *args)
Definition: ipsec_format.c:78
unsigned int u32
Definition: types.h:88
esp_decrypt_error_t
Definition: esp_decrypt.c:54
#define foreach_esp_decrypt_error
Definition: esp_decrypt.c:60
ipsec_sa_flags_t flags
Definition: ipsec_sa.h:113
#define VLIB_FRAME_SIZE
Definition: node.h:377
bool is_ip6
Definition: ip.api:43
static heap_elt_t * first(heap_header_t *h)
Definition: heap.c:59
vl_api_fib_path_type_t type
Definition: fib_types.api:123
vlib_error_t error
Error code for buffers to be enqueued to error handler.
Definition: buffer.h:136
u32 last_seq
Definition: ipsec_sa.h:123
static u32 vlib_buffer_chain_linearize(vlib_main_t *vm, vlib_buffer_t *b)
#define ESP_MAX_ICV_SIZE
Definition: esp.h:78
#define pool_elt_at_index(p, i)
Returns pointer to element at given index.
Definition: pool.h:534
static_always_inline u8 * esp_move_icv_esn(vlib_main_t *vm, vlib_buffer_t *first, esp_decrypt_packet_data2_t *pd2, u16 icv_sz, ipsec_sa_t *sa, u8 *extra_esn, u32 *len)
Definition: esp_decrypt.c:271
static u8 iv[]
Definition: aes_cbc.c:24
u8 integ_alg
Definition: ikev2_types.api:59
uword user_data
Definition: crypto.h:233
esp_async_post_next_t esp_decrypt_async_next
Definition: ipsec.c:30
static_always_inline i16 esp_insert_esn(vlib_main_t *vm, ipsec_sa_t *sa, esp_decrypt_packet_data2_t *pd2, u32 *data_len, u8 **digest, u16 *len, vlib_buffer_t *b, u8 *payload)
Definition: esp_decrypt.c:235
static __clib_warn_unused_result u32 vlib_buffer_alloc(vlib_main_t *vm, u32 *buffers, u32 n_buffers)
Allocate buffers into supplied array.
Definition: buffer_funcs.h:677
u32 salt
Definition: ipsec_sa.h:184
static void ipsec_sa_anti_replay_advance(ipsec_sa_t *sa, u32 seq)
Definition: ipsec_sa.h:425
unsigned short u16
Definition: types.h:57
static uword esp_decrypt_post_inline(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame, int is_ip6, int is_tun)
Definition: esp_decrypt.c:1307
u8 data_len
Definition: ikev2_types.api:24
static void * vlib_buffer_get_current(vlib_buffer_t *b)
Get pointer to current data to process.
Definition: buffer.h:229
vnet_crypto_async_op_id_t crypto_async_dec_op_id
Definition: ipsec_sa.h:145
#define PREDICT_FALSE(x)
Definition: clib.h:120
#define always_inline
Definition: ipsec.h:28
vl_api_ip4_address_t ip4
Definition: one.api:376
static void esp_remove_tail(vlib_main_t *vm, vlib_buffer_t *b, vlib_buffer_t *last, u16 tail)
Definition: esp_decrypt.c:180
u32 node_index
Node index.
Definition: node.h:487
#define VNET_CRYPTO_OP_FLAG_HMAC_CHECK
Definition: crypto.h:238
vlib_node_registration_t esp6_decrypt_post_node
(constructor) VLIB_REGISTER_NODE (esp6_decrypt_post_node)
Definition: esp_decrypt.c:1499
static_always_inline vnet_crypto_async_frame_t * vnet_crypto_async_get_frame(vlib_main_t *vm, vnet_crypto_async_op_id_t opt)
async crypto inline functions
Definition: crypto.h:531
static void vlib_node_increment_counter(vlib_main_t *vm, u32 node_index, u32 counter_index, u64 increment)
Definition: node_funcs.h:1231
u8 len
Definition: ip_types.api:92
vnet_crypto_op_t * chained_crypto_ops
Definition: ipsec.h:97
#define vec_add_aligned(V, E, N, A)
Add N elements to end of vector V (no header, specified alignment)
Definition: vec.h:678
#define VLIB_REGISTER_NODE(x,...)
Definition: node.h:169
u16 n_vectors
Definition: node.h:396
#define foreach_esp_decrypt_post_next
Definition: esp_decrypt.c:46
#define CLIB_PREFETCH(addr, size, type)
Definition: cache.h:80
static_always_inline void vlib_buffer_enqueue_to_next(vlib_main_t *vm, vlib_node_runtime_t *node, u32 *buffers, u16 *nexts, uword count)
Definition: buffer_node.h:339
u16 protocol
Definition: packet.h:55
u8 data[]
Packet data.
Definition: buffer.h:181
#define ARRAY_LEN(x)
Definition: clib.h:67
static u32 vlib_buffer_space_left_at_end(vlib_main_t *vm, vlib_buffer_t *b)
vlib_node_registration_t esp6_decrypt_tun_post_node
(constructor) VLIB_REGISTER_NODE (esp6_decrypt_tun_post_node)
Definition: esp_decrypt.c:1559
u32 esp4_post_next
Definition: esp.h:194
vlib_main_t vlib_node_runtime_t * node
Definition: in2out_ed.c:1582
#define clib_atomic_cmp_and_swap(addr, old, new)
Definition: atomics.h:37
u32 esp6_tun_post_next
Definition: esp.h:197
ip46_address_t dst
Definition: ipsec_tun.h:68
vlib_combined_counter_main_t ipsec_sa_counters
SA packet & bytes counters.
Definition: ipsec_sa.c:27
#define ASSERT(truth)
u32 vnet_crypto_process_chained_ops(vlib_main_t *vm, vnet_crypto_op_t ops[], vnet_crypto_op_chunk_t *chunks, u32 n_ops)
Definition: crypto.c:105
ipsec_sa_t * sad
Definition: ipsec.h:107
static ipsec_tun_protect_t * ipsec_tun_protect_get(u32 index)
Definition: ipsec_tun.h:162
ipsec_sa_flags_t flags
Definition: esp.h:144
static int ipsec_sa_anti_replay_check(ipsec_sa_t *sa, u32 seq)
Definition: ipsec_sa.h:298
static void vlib_buffer_advance(vlib_buffer_t *b, word l)
Advance current data pointer by the supplied (signed!) amount.
Definition: buffer.h:248
vnet_crypto_async_op_id_t
Definition: crypto.h:159
vnet_crypto_key_index_t integ_key_index
Definition: ipsec_sa.h:129
static_always_inline void clib_memset_u16(void *p, u16 val, uword count)
Definition: string.h:378
static_always_inline int vnet_crypto_async_submit_open_frame(vlib_main_t *vm, vnet_crypto_async_frame_t *frame)
Definition: crypto.h:560
static_always_inline void clib_memcpy_le64(u8 *dst, u8 *src, u8 len)
Definition: string.h:283
u16 payload_length
Definition: ip6_packet.h:301
vl_api_address_t ip
Definition: l2.api:501
vlib_node_registration_t esp4_decrypt_post_node
(constructor) VLIB_REGISTER_NODE (esp4_decrypt_post_node)
Definition: esp_decrypt.c:1467
#define vec_len(v)
Number of elements in vector (rvalue-only, NULL tolerant)
static void vnet_update_l2_len(vlib_buffer_t *b)
Definition: l2_input.h:236
u32 next_buffer
Next buffer for this linked-list of buffers.
Definition: buffer.h:140
VLIB buffer representation.
Definition: buffer.h:102
u64 uword
Definition: types.h:112
#define esp_post_data2(b)
Definition: esp.h:187
static void * vlib_frame_vector_args(vlib_frame_t *f)
Get pointer to frame vector data.
Definition: node_funcs.h:297
ipsec_crypto_alg_t
Definition: ipsec_sa.h:37
#define ip_csum_update(sum, old, new, type, field)
Definition: ip_packet.h:294
u32 index
Definition: flow_types.api:221
static_always_inline int ip46_address_is_equal_v4(const ip46_address_t *ip46, const ip4_address_t *ip4)
Definition: ip46_address.h:108
vnet_crypto_op_t * chained_integ_ops
Definition: ipsec.h:98
vnet_crypto_op_status_t status
Definition: crypto.h:235
#define vnet_buffer(b)
Definition: buffer.h:417
#define foreach_esp_decrypt_next
Definition: esp_decrypt.c:30
ipsec_crypto_alg_t crypto_alg
Definition: ipsec_sa.h:167
static_always_inline void esp_process_chained_ops(vlib_main_t *vm, vlib_node_runtime_t *node, vnet_crypto_op_t *ops, vlib_buffer_t *b[], u16 *nexts, vnet_crypto_op_chunk_t *chunks, int e)
Definition: esp_decrypt.c:148
static_always_inline int esp_decrypt_chain_integ(vlib_main_t *vm, ipsec_per_thread_data_t *ptd, esp_decrypt_packet_data2_t *pd2, ipsec_sa_t *sa0, vlib_buffer_t *b, u8 icv_sz, u8 *start_src, u32 start_len, u8 **digest, u16 *n_ch, u32 *integ_total_len)
Definition: esp_decrypt.c:305
vlib_buffer_t * lb
Definition: esp.h:164
void * vlib_add_trace(vlib_main_t *vm, vlib_node_runtime_t *r, vlib_buffer_t *b, u32 n_data_bytes)
Definition: trace.c:577
static void vlib_buffer_free_one(vlib_main_t *vm, u32 buffer_index)
Free one buffer Shorthand to free a single buffer chain.
Definition: buffer_funcs.h:970
static_always_inline void vlib_get_buffers(vlib_main_t *vm, u32 *bi, vlib_buffer_t **b, int count)
Translate array of buffer indices into buffer pointers.
Definition: buffer_funcs.h:280
u8 crypto_iv_size
Definition: ipsec_sa.h:115
#define CLIB_CACHE_LINE_BYTES
Definition: cache.h:59
vl_api_ikev2_sa_transform_t esn
u8 async_mode
Definition: ipsec.h:202
static_always_inline void esp_decrypt_post_crypto(vlib_main_t *vm, vlib_node_runtime_t *node, esp_decrypt_packet_data_t *pd, esp_decrypt_packet_data2_t *pd2, vlib_buffer_t *b, u16 *next, int is_ip6, int is_tun, int is_async)
Definition: esp_decrypt.c:753
vnet_crypto_op_id_t crypto_dec_op_id
Definition: ipsec_sa.h:138
vlib_node_registration_t esp6_decrypt_node
(constructor) VLIB_REGISTER_NODE (esp6_decrypt_node)
Definition: esp_decrypt.c:1479
u8 integ_icv_size
Definition: ipsec_sa.h:117
static vlib_buffer_t * vlib_get_buffer(vlib_main_t *vm, u32 buffer_index)
Translate buffer index into buffer pointer.
Definition: buffer_funcs.h:85
u32 decrypt_thread_index
Definition: ipsec_sa.h:119
static u16 ip_csum_fold(ip_csum_t c)
Definition: ip_packet.h:300
ipsec_integ_alg_t integ_alg
Definition: esp_decrypt.c:74
vlib_node_registration_t esp4_decrypt_node
(constructor) VLIB_REGISTER_NODE (esp4_decrypt_node)
Definition: esp_decrypt.c:1447
ip6_address_t dst_address
Definition: ip6_packet.h:310
static_always_inline void esp_decrypt_prepare_sync_op(vlib_main_t *vm, vlib_node_runtime_t *node, ipsec_per_thread_data_t *ptd, vnet_crypto_op_t ***crypto_ops, vnet_crypto_op_t ***integ_ops, vnet_crypto_op_t *op, ipsec_sa_t *sa0, u8 *payload, u16 len, u8 icv_sz, u8 iv_sz, esp_decrypt_packet_data_t *pd, esp_decrypt_packet_data2_t *pd2, vlib_buffer_t *b, u16 *next, u32 index)
Definition: esp_decrypt.c:473
signed short i16
Definition: types.h:46