src/plugins/dpdk/ipsec/esp_decrypt.c

   1 /*
   2  * esp_decrypt.c : IPSec ESP Decrypt node using DPDK Cryptodev
   3  *
   4  * Copyright (c) 2016 Intel 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
  22 #include <vnet/ipsec/ipsec.h>
  23 #include <dpdk/ipsec/ipsec.h>
  24 #include <dpdk/ipsec/esp.h>
  25 #include <dpdk/device/dpdk.h>
  26 #include <dpdk/device/dpdk_priv.h>
  27
  28 #define foreach_esp_decrypt_next               \
  29 _(DROP, "error-drop")                          \
  30 _(IP4_INPUT, "ip4-input")                      \
  31 _(IP6_INPUT, "ip6-input")
  32
  33 #define _(v, s) ESP_DECRYPT_NEXT_##v,
  34 typedef enum {
  35   foreach_esp_decrypt_next
  36 #undef _
  37   ESP_DECRYPT_N_NEXT,
  38 } esp_decrypt_next_t;
  39
  40 #define foreach_esp_decrypt_error                \
  41  _(RX_PKTS, "ESP pkts received")                 \
  42  _(DECRYPTION_FAILED, "ESP decryption failed")   \
  43  _(REPLAY, "SA replayed packet")                 \
  44  _(NOT_IP, "Not IP packet (dropped)")            \
  45  _(ENQ_FAIL, "Enqueue failed (buffer full)")     \
  46  _(NO_CRYPTODEV, "Cryptodev not configured")     \
  47  _(BAD_LEN, "Invalid ciphertext length")         \
  48  _(UNSUPPORTED, "Cipher/Auth not supported")
  49
  50
  51 typedef enum {
  52 #define _(sym,str) ESP_DECRYPT_ERROR_##sym,
  53   foreach_esp_decrypt_error
  54 #undef _
  55   ESP_DECRYPT_N_ERROR,
  56 } esp_decrypt_error_t;
  57
  58 static char * esp_decrypt_error_strings[] = {
  59 #define _(sym,string) string,
  60   foreach_esp_decrypt_error
  61 #undef _
  62 };
  63
  64 vlib_node_registration_t dpdk_esp_decrypt_node;
  65
  66 typedef struct {
  67   ipsec_crypto_alg_t crypto_alg;
  68   ipsec_integ_alg_t integ_alg;
  69 } esp_decrypt_trace_t;
  70
  71 /* packet trace format function */
  72 static u8 * format_esp_decrypt_trace (u8 * s, va_list * args)
  73 {
  74   CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
  75   CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
  76   esp_decrypt_trace_t * t = va_arg (*args, esp_decrypt_trace_t *);
  77
  78   s = format (s, "esp: crypto %U integrity %U",
  79               format_ipsec_crypto_alg, t->crypto_alg,
  80               format_ipsec_integ_alg, t->integ_alg);
  81   return s;
  82 }
  83
  84 static uword
  85 dpdk_esp_decrypt_node_fn (vlib_main_t * vm,
  86              vlib_node_runtime_t * node,
  87              vlib_frame_t * from_frame)
  88 {
  89   u32 n_left_from, *from, *to_next, next_index;
  90   ipsec_main_t *im = &ipsec_main;
  91   u32 thread_index = vlib_get_thread_index();
  92   dpdk_crypto_main_t * dcm = &dpdk_crypto_main;
  93   dpdk_esp_main_t * em = &dpdk_esp_main;
  94   u32 i;
  95
  96   from = vlib_frame_vector_args (from_frame);
  97   n_left_from = from_frame->n_vectors;
  98
  99   if (PREDICT_FALSE(!dcm->workers_main))
 100     {
 101       vlib_node_increment_counter (vm, dpdk_esp_decrypt_node.index,
 102               ESP_DECRYPT_ERROR_NO_CRYPTODEV, n_left_from);
 103       vlib_buffer_free(vm, from, n_left_from);
 104       return n_left_from;
 105     }
 106
 107   crypto_worker_main_t *cwm = vec_elt_at_index(dcm->workers_main, thread_index);
 108   u32 n_qps = vec_len(cwm->qp_data);
 109   struct rte_crypto_op ** cops_to_enq[n_qps];
 110   u32 n_cop_qp[n_qps], * bi_to_enq[n_qps];
 111
 112   for (i = 0; i < n_qps; i++)
 113     {
 114       bi_to_enq[i] = cwm->qp_data[i].bi;
 115       cops_to_enq[i] = cwm->qp_data[i].cops;
 116     }
 117
 118   memset(n_cop_qp, 0, n_qps * sizeof(u32));
 119
 120   crypto_alloc_cops();
 121
 122   next_index = ESP_DECRYPT_NEXT_DROP;
 123
 124   while (n_left_from > 0)
 125     {
 126       u32 n_left_to_next;
 127
 128       vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
 129
 130       while (n_left_from > 0 && n_left_to_next > 0)
 131         {
 132           u32 bi0, sa_index0 = ~0, seq, icv_size, iv_size;
 133           vlib_buffer_t * b0;
 134           esp_header_t * esp0;
 135           ipsec_sa_t * sa0;
 136           struct rte_mbuf * mb0 = 0;
 137           const int BLOCK_SIZE = 16;
 138           crypto_sa_session_t * sa_sess;
 139           void * sess;
 140           u16 qp_index;
 141           struct rte_crypto_op * cop = 0;
 142
 143           bi0 = from[0];
 144           from += 1;
 145           n_left_from -= 1;
 146
 147           b0 = vlib_get_buffer (vm, bi0);
 148           esp0 = vlib_buffer_get_current (b0);
 149
 150           sa_index0 = vnet_buffer(b0)->ipsec.sad_index;
 151           sa0 = pool_elt_at_index (im->sad, sa_index0);
 152
 153           seq = clib_host_to_net_u32(esp0->seq);
 154
 155           /* anti-replay check */
 156           if (sa0->use_anti_replay)
 157             {
 158               int rv = 0;
 159
 160               if (PREDICT_TRUE(sa0->use_esn))
 161                 rv = esp_replay_check_esn(sa0, seq);
 162               else
 163                 rv = esp_replay_check(sa0, seq);
 164
 165               if (PREDICT_FALSE(rv))
 166                 {
 167                   clib_warning ("anti-replay SPI %u seq %u", sa0->spi, seq);
 168                   vlib_node_increment_counter (vm, dpdk_esp_decrypt_node.index,
 169                                                ESP_DECRYPT_ERROR_REPLAY, 1);
 170                   to_next[0] = bi0;
 171                   to_next += 1;
 172                   n_left_to_next -= 1;
 173                   goto trace;
 174                 }
 175             }
 176
 177           sa0->total_data_size += b0->current_length;
 178
 179           if (PREDICT_FALSE(sa0->integ_alg == IPSEC_INTEG_ALG_NONE) ||
 180                   PREDICT_FALSE(sa0->crypto_alg == IPSEC_CRYPTO_ALG_NONE))
 181             {
 182               clib_warning ("SPI %u : only cipher + auth supported", sa0->spi);
 183               vlib_node_increment_counter (vm, dpdk_esp_decrypt_node.index,
 184                                            ESP_DECRYPT_ERROR_UNSUPPORTED, 1);
 185               to_next[0] = bi0;
 186               to_next += 1;
 187               n_left_to_next -= 1;
 188               goto trace;
 189             }
 190
 191           sa_sess = pool_elt_at_index(cwm->sa_sess_d[0], sa_index0);
 192
 193           if (PREDICT_FALSE(!sa_sess->sess))
 194             {
 195               int ret = create_sym_sess(sa0, sa_sess, 0);
 196
 197               if (PREDICT_FALSE (ret))
 198                 {
 199                   to_next[0] = bi0;
 200                   to_next += 1;
 201                   n_left_to_next -= 1;
 202                   goto trace;
 203                 }
 204             }
 205
 206           sess = sa_sess->sess;
 207           qp_index = sa_sess->qp_index;
 208
 209           ASSERT (vec_len (vec_elt (cwm->qp_data, qp_index).free_cops) > 0);
 210           cop = vec_pop (vec_elt (cwm->qp_data, qp_index).free_cops);
 211           ASSERT (cop->status == RTE_CRYPTO_OP_STATUS_NOT_PROCESSED);
 212
 213           cops_to_enq[qp_index][0] = cop;
 214           cops_to_enq[qp_index] += 1;
 215           n_cop_qp[qp_index] += 1;
 216           bi_to_enq[qp_index][0] = bi0;
 217           bi_to_enq[qp_index] += 1;
 218
 219           rte_crypto_op_attach_sym_session(cop, sess);
 220
 221           icv_size = em->esp_integ_algs[sa0->integ_alg].trunc_size;
 222           iv_size = em->esp_crypto_algs[sa0->crypto_alg].iv_len;
 223
 224           /* Convert vlib buffer to mbuf */
 225           mb0 = rte_mbuf_from_vlib_buffer(b0);
 226           mb0->data_len = b0->current_length;
 227           mb0->pkt_len = b0->current_length;
 228           mb0->data_off = RTE_PKTMBUF_HEADROOM + b0->current_data;
 229
 230           /* Outer IP header has already been stripped */
 231           u16 payload_len = rte_pktmbuf_pkt_len(mb0) - sizeof (esp_header_t) -
 232               iv_size - icv_size;
 233
 234           if ((payload_len & (BLOCK_SIZE - 1)) || (payload_len <= 0))
 235             {
 236               clib_warning ("payload %u not multiple of %d\n",
 237                             payload_len, BLOCK_SIZE);
 238               vlib_node_increment_counter (vm, dpdk_esp_decrypt_node.index,
 239                                            ESP_DECRYPT_ERROR_BAD_LEN, 1);
 240               vec_add (vec_elt (cwm->qp_data, qp_index).free_cops, &cop, 1);
 241               bi_to_enq[qp_index] -= 1;
 242               cops_to_enq[qp_index] -= 1;
 243               n_cop_qp[qp_index] -= 1;
 244               to_next[0] = bi0;
 245               to_next += 1;
 246               n_left_to_next -= 1;
 247               goto trace;
 248             }
 249
 250           struct rte_crypto_sym_op *sym_cop = (struct rte_crypto_sym_op *)(cop + 1);
 251
 252           sym_cop->m_src = mb0;
 253           sym_cop->cipher.data.offset = sizeof (esp_header_t) + iv_size;
 254           sym_cop->cipher.data.length = payload_len;
 255
 256           u8 *iv = rte_pktmbuf_mtod_offset(mb0, void*, sizeof (esp_header_t));
 257           dpdk_cop_priv_t * priv = (dpdk_cop_priv_t *)(sym_cop + 1);
 258
 259           if (sa0->crypto_alg == IPSEC_CRYPTO_ALG_AES_GCM_128)
 260             {
 261               dpdk_gcm_cnt_blk *icb = &priv->cb;
 262               icb->salt = sa0->salt;
 263               clib_memcpy(icb->iv, iv, 8);
 264               icb->cnt = clib_host_to_net_u32(1);
 265               sym_cop->cipher.iv.data = (u8 *)icb;
 266               sym_cop->cipher.iv.phys_addr = cop->phys_addr +
 267                 (uintptr_t)icb - (uintptr_t)cop;
 268               sym_cop->cipher.iv.length = 16;
 269
 270               u8 *aad = priv->aad;
 271               clib_memcpy(aad, iv - sizeof(esp_header_t), 8);
 272               sym_cop->auth.aad.data = aad;
 273               sym_cop->auth.aad.phys_addr = cop->phys_addr +
 274                   (uintptr_t)aad - (uintptr_t)cop;
 275               if (sa0->use_esn)
 276                 {
 277                   *((u32*)&aad[8]) = sa0->seq_hi;
 278                   sym_cop->auth.aad.length = 12;
 279                 }
 280               else
 281                 {
 282                   sym_cop->auth.aad.length = 8;
 283                 }
 284
 285               sym_cop->auth.digest.data = rte_pktmbuf_mtod_offset(mb0, void*,
 286                        rte_pktmbuf_pkt_len(mb0) - icv_size);
 287               sym_cop->auth.digest.phys_addr = rte_pktmbuf_mtophys_offset(mb0,
 288                        rte_pktmbuf_pkt_len(mb0) - icv_size);
 289               sym_cop->auth.digest.length = icv_size;
 290
 291             }
 292           else
 293             {
 294               sym_cop->cipher.iv.data = rte_pktmbuf_mtod_offset(mb0, void*,
 295                        sizeof (esp_header_t));
 296               sym_cop->cipher.iv.phys_addr = rte_pktmbuf_mtophys_offset(mb0,
 297                        sizeof (esp_header_t));
 298               sym_cop->cipher.iv.length = iv_size;
 299
 300               if (sa0->use_esn)
 301                 {
 302                   dpdk_cop_priv_t* priv = (dpdk_cop_priv_t*) (sym_cop + 1);
 303                   u8* payload_end = rte_pktmbuf_mtod_offset(
 304                       mb0, u8*, sizeof(esp_header_t) + iv_size + payload_len);
 305
 306                   clib_memcpy (priv->icv, payload_end, icv_size);
 307                   *((u32*) payload_end) = sa0->seq_hi;
 308                   sym_cop->auth.data.offset = 0;
 309                   sym_cop->auth.data.length = sizeof(esp_header_t) + iv_size
 310                       + payload_len + sizeof(sa0->seq_hi);
 311                   sym_cop->auth.digest.data = priv->icv;
 312                   sym_cop->auth.digest.phys_addr = cop->phys_addr
 313                       + (uintptr_t) priv->icv - (uintptr_t) cop;
 314                   sym_cop->auth.digest.length = icv_size;
 315                 }
 316               else
 317                 {
 318                   sym_cop->auth.data.offset = 0;
 319                   sym_cop->auth.data.length = sizeof(esp_header_t) +
 320                            iv_size + payload_len;
 321
 322                   sym_cop->auth.digest.data = rte_pktmbuf_mtod_offset(mb0, void*,
 323                            rte_pktmbuf_pkt_len(mb0) - icv_size);
 324                   sym_cop->auth.digest.phys_addr = rte_pktmbuf_mtophys_offset(mb0,
 325                            rte_pktmbuf_pkt_len(mb0) - icv_size);
 326                   sym_cop->auth.digest.length = icv_size;
 327                 }
 328             }
 329
 330 trace:
 331           if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
 332             {
 333               esp_decrypt_trace_t *tr = vlib_add_trace (vm, node, b0, sizeof (*tr));
 334               tr->crypto_alg = sa0->crypto_alg;
 335               tr->integ_alg = sa0->integ_alg;
 336             }
 337         }
 338       vlib_put_next_frame (vm, node, next_index, n_left_to_next);
 339     }
 340   vlib_node_increment_counter (vm, dpdk_esp_decrypt_node.index,
 341                                ESP_DECRYPT_ERROR_RX_PKTS,
 342                                from_frame->n_vectors);
 343   crypto_qp_data_t *qpd;
 344   /* *INDENT-OFF* */
 345   vec_foreach_index (i, cwm->qp_data)
 346     {
 347       u32 enq;
 348
 349       qpd = vec_elt_at_index(cwm->qp_data, i);
 350       enq = rte_cryptodev_enqueue_burst(qpd->dev_id, qpd->qp_id,
 351                                         qpd->cops, n_cop_qp[i]);
 352       qpd->inflights += enq;
 353
 354       if (PREDICT_FALSE(enq < n_cop_qp[i]))
 355         {
 356           crypto_free_cop (qpd, &qpd->cops[enq], n_cop_qp[i] - enq);
 357           vlib_buffer_free (vm, &qpd->bi[enq], n_cop_qp[i] - enq);
 358
 359           vlib_node_increment_counter (vm, dpdk_esp_decrypt_node.index,
 360                                        ESP_DECRYPT_ERROR_ENQ_FAIL,
 361                                        n_cop_qp[i] - enq);
 362         }
 363     }
 364   /* *INDENT-ON* */
 365
 366   return from_frame->n_vectors;
 367 }
 368
 369 VLIB_REGISTER_NODE (dpdk_esp_decrypt_node) = {
 370   .function = dpdk_esp_decrypt_node_fn,
 371   .name = "dpdk-esp-decrypt",
 372   .vector_size = sizeof (u32),
 373   .format_trace = format_esp_decrypt_trace,
 374   .type = VLIB_NODE_TYPE_INTERNAL,
 375
 376   .n_errors = ARRAY_LEN(esp_decrypt_error_strings),
 377   .error_strings = esp_decrypt_error_strings,
 378
 379   .n_next_nodes = ESP_DECRYPT_N_NEXT,
 380   .next_nodes = {
 381 #define _(s,n) [ESP_DECRYPT_NEXT_##s] = n,
 382     foreach_esp_decrypt_next
 383 #undef _
 384   },
 385 };
 386
 387 VLIB_NODE_FUNCTION_MULTIARCH (dpdk_esp_decrypt_node, dpdk_esp_decrypt_node_fn)
 388
 389 /*
 390  * Decrypt Post Node
 391  */
 392
 393 #define foreach_esp_decrypt_post_error        \
 394  _(PKTS, "ESP post pkts")
 395
 396 typedef enum {
 397 #define _(sym,str) ESP_DECRYPT_POST_ERROR_##sym,
 398   foreach_esp_decrypt_post_error
 399 #undef _
 400   ESP_DECRYPT_POST_N_ERROR,
 401 } esp_decrypt_post_error_t;
 402
 403 static char * esp_decrypt_post_error_strings[] = {
 404 #define _(sym,string) string,
 405   foreach_esp_decrypt_post_error
 406 #undef _
 407 };
 408
 409 vlib_node_registration_t dpdk_esp_decrypt_post_node;
 410
 411 static u8 * format_esp_decrypt_post_trace (u8 * s, va_list * args)
 412 {
 413   return s;
 414 }
 415
 416 static uword
 417 dpdk_esp_decrypt_post_node_fn (vlib_main_t * vm,
 418              vlib_node_runtime_t * node,
 419              vlib_frame_t * from_frame)
 420 {
 421   u32 n_left_from, *from, *to_next = 0, next_index;
 422   ipsec_sa_t * sa0;
 423   u32 sa_index0 = ~0;
 424   ipsec_main_t *im = &ipsec_main;
 425   dpdk_esp_main_t *em = &dpdk_esp_main;
 426
 427   from = vlib_frame_vector_args (from_frame);
 428   n_left_from = from_frame->n_vectors;
 429
 430   next_index = node->cached_next_index;
 431
 432   while (n_left_from > 0)
 433     {
 434       u32 n_left_to_next;
 435
 436       vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
 437
 438       while (n_left_from > 0 && n_left_to_next > 0)
 439         {
 440           esp_footer_t * f0;
 441           u32 bi0, next0, icv_size, iv_size;
 442           vlib_buffer_t * b0 = 0;
 443           ip4_header_t *ih4 = 0, *oh4 = 0;
 444           ip6_header_t *ih6 = 0, *oh6 = 0;
 445           u8 tunnel_mode = 1;
 446           u8 transport_ip6 = 0;
 447
 448           next0 = ESP_DECRYPT_NEXT_DROP;
 449
 450           bi0 = from[0];
 451           from += 1;
 452           n_left_from -= 1;
 453           n_left_to_next -= 1;
 454
 455           b0 = vlib_get_buffer (vm, bi0);
 456
 457           sa_index0 = vnet_buffer(b0)->ipsec.sad_index;
 458           sa0 = pool_elt_at_index (im->sad, sa_index0);
 459
 460           to_next[0] = bi0;
 461           to_next += 1;
 462
 463           icv_size = em->esp_integ_algs[sa0->integ_alg].trunc_size;
 464           iv_size = em->esp_crypto_algs[sa0->crypto_alg].iv_len;
 465
 466           if (sa0->use_anti_replay)
 467             {
 468               esp_header_t * esp0 = vlib_buffer_get_current (b0);
 469               u32 seq;
 470               seq = clib_host_to_net_u32(esp0->seq);
 471               if (PREDICT_TRUE(sa0->use_esn))
 472                 esp_replay_advance_esn(sa0, seq);
 473               else
 474                 esp_replay_advance(sa0, seq);
 475             }
 476
 477           ih4 = (ip4_header_t *) (b0->data + sizeof(ethernet_header_t));
 478           vlib_buffer_advance (b0, sizeof (esp_header_t) + iv_size);
 479
 480           b0->current_length -= (icv_size + 2);
 481           b0->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID;
 482           f0 = (esp_footer_t *) ((u8 *) vlib_buffer_get_current (b0) +
 483                                  b0->current_length);
 484           b0->current_length -= f0->pad_length;
 485
 486           /* transport mode */
 487           if (PREDICT_FALSE(!sa0->is_tunnel && !sa0->is_tunnel_ip6))
 488             {
 489               tunnel_mode = 0;
 490
 491               if (PREDICT_TRUE((ih4->ip_version_and_header_length & 0xF0) != 0x40))
 492                 {
 493                   if (PREDICT_TRUE((ih4->ip_version_and_header_length & 0xF0) == 0x60))
 494                     transport_ip6 = 1;
 495                   else
 496                     {
 497                       clib_warning("next header: 0x%x", f0->next_header);
 498                       vlib_node_increment_counter (vm, dpdk_esp_decrypt_node.index,
 499                                                    ESP_DECRYPT_ERROR_NOT_IP, 1);
 500                       goto trace;
 501                     }
 502                 }
 503             }
 504
 505           if (PREDICT_TRUE (tunnel_mode))
 506             {
 507               if (PREDICT_TRUE(f0->next_header == IP_PROTOCOL_IP_IN_IP))
 508                 next0 = ESP_DECRYPT_NEXT_IP4_INPUT;
 509               else if (f0->next_header == IP_PROTOCOL_IPV6)
 510                 next0 = ESP_DECRYPT_NEXT_IP6_INPUT;
 511               else
 512                 {
 513                   clib_warning("next header: 0x%x", f0->next_header);
 514                   vlib_node_increment_counter (vm, dpdk_esp_decrypt_node.index,
 515                                                ESP_DECRYPT_ERROR_DECRYPTION_FAILED,
 516                                                1);
 517                   goto trace;
 518                 }
 519             }
 520           /* transport mode */
 521           else
 522             {
 523               if (PREDICT_FALSE(transport_ip6))
 524                 {
 525                   ih6 = (ip6_header_t *) (b0->data + sizeof(ethernet_header_t));
 526                   vlib_buffer_advance (b0, -sizeof(ip6_header_t));
 527                   oh6 = vlib_buffer_get_current (b0);
 528                   memmove(oh6, ih6, sizeof(ip6_header_t));
 529
 530                   next0 = ESP_DECRYPT_NEXT_IP6_INPUT;
 531                   oh6->protocol = f0->next_header;
 532                   oh6->payload_length =
 533                       clib_host_to_net_u16 (
 534                           vlib_buffer_length_in_chain(vm, b0) -
 535                           sizeof (ip6_header_t));
 536                 }
 537               else
 538                 {
 539                   vlib_buffer_advance (b0, -sizeof(ip4_header_t));
 540                   oh4 = vlib_buffer_get_current (b0);
 541                   memmove(oh4, ih4, sizeof(ip4_header_t));
 542
 543                   next0 = ESP_DECRYPT_NEXT_IP4_INPUT;
 544                   oh4->ip_version_and_header_length = 0x45;
 545                   oh4->fragment_id = 0;
 546                   oh4->flags_and_fragment_offset = 0;
 547                   oh4->protocol = f0->next_header;
 548                   oh4->length = clib_host_to_net_u16 (
 549                       vlib_buffer_length_in_chain (vm, b0));
 550                   oh4->checksum = ip4_header_checksum (oh4);
 551                 }
 552             }
 553
 554           vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32)~0;
 555
 556 trace:
 557           if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
 558             {
 559               esp_decrypt_trace_t *tr = vlib_add_trace (vm, node, b0, sizeof (*tr));
 560               tr->crypto_alg = sa0->crypto_alg;
 561               tr->integ_alg = sa0->integ_alg;
 562             }
 563
 564           vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
 565                                            to_next, n_left_to_next, bi0, next0);
 566         }
 567       vlib_put_next_frame (vm, node, next_index, n_left_to_next);
 568     }
 569   vlib_node_increment_counter (vm, dpdk_esp_decrypt_post_node.index,
 570                                ESP_DECRYPT_POST_ERROR_PKTS,
 571                                from_frame->n_vectors);
 572
 573   return from_frame->n_vectors;
 574 }
 575
 576 VLIB_REGISTER_NODE (dpdk_esp_decrypt_post_node) = {
 577   .function = dpdk_esp_decrypt_post_node_fn,
 578   .name = "dpdk-esp-decrypt-post",
 579   .vector_size = sizeof (u32),
 580   .format_trace = format_esp_decrypt_post_trace,
 581   .type = VLIB_NODE_TYPE_INTERNAL,
 582
 583   .n_errors = ARRAY_LEN(esp_decrypt_post_error_strings),
 584   .error_strings = esp_decrypt_post_error_strings,
 585
 586   .n_next_nodes = ESP_DECRYPT_N_NEXT,
 587   .next_nodes = {
 588 #define _(s,n) [ESP_DECRYPT_NEXT_##s] = n,
 589     foreach_esp_decrypt_next
 590 #undef _
 591   },
 592 };
 593
 594 VLIB_NODE_FUNCTION_MULTIARCH (dpdk_esp_decrypt_post_node, dpdk_esp_decrypt_post_node_fn)