src/vnet/devices/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 <vnet/devices/dpdk/ipsec/ipsec.h>
  24 #include <vnet/devices/dpdk/ipsec/esp.h>
  25 #include <vnet/devices/dpdk/dpdk.h>
  26 #include <vnet/devices/dpdk/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 cpu_index = os_get_cpu_number();
  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, cpu_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           if (PREDICT_FALSE(sa0->integ_alg == IPSEC_INTEG_ALG_NONE) ||
 178                   PREDICT_FALSE(sa0->crypto_alg == IPSEC_CRYPTO_ALG_NONE))
 179             {
 180               clib_warning ("SPI %u : only cipher + auth supported", sa0->spi);
 181               vlib_node_increment_counter (vm, dpdk_esp_decrypt_node.index,
 182                                            ESP_DECRYPT_ERROR_UNSUPPORTED, 1);
 183               to_next[0] = bi0;
 184               to_next += 1;
 185               n_left_to_next -= 1;
 186               goto trace;
 187             }
 188
 189           sa_sess = pool_elt_at_index(cwm->sa_sess_d[0], sa_index0);
 190
 191           if (PREDICT_FALSE(!sa_sess->sess))
 192             {
 193               int ret = create_sym_sess(sa0, sa_sess, 0);
 194
 195               if (PREDICT_FALSE (ret))
 196                 {
 197                   to_next[0] = bi0;
 198                   to_next += 1;
 199                   n_left_to_next -= 1;
 200                   goto trace;
 201                 }
 202             }
 203
 204           sess = sa_sess->sess;
 205           qp_index = sa_sess->qp_index;
 206
 207           ASSERT (vec_len (vec_elt (cwm->qp_data, qp_index).free_cops) > 0);
 208           cop = vec_pop (vec_elt (cwm->qp_data, qp_index).free_cops);
 209           ASSERT (cop->status == RTE_CRYPTO_OP_STATUS_NOT_PROCESSED);
 210
 211           cops_to_enq[qp_index][0] = cop;
 212           cops_to_enq[qp_index] += 1;
 213           n_cop_qp[qp_index] += 1;
 214           bi_to_enq[qp_index][0] = bi0;
 215           bi_to_enq[qp_index] += 1;
 216
 217           rte_crypto_op_attach_sym_session(cop, sess);
 218
 219           icv_size = em->esp_integ_algs[sa0->integ_alg].trunc_size;
 220           iv_size = em->esp_crypto_algs[sa0->crypto_alg].iv_len;
 221
 222           /* Convert vlib buffer to mbuf */
 223           mb0 = rte_mbuf_from_vlib_buffer(b0);
 224           mb0->data_len = b0->current_length;
 225           mb0->pkt_len = b0->current_length;
 226           mb0->data_off = RTE_PKTMBUF_HEADROOM + b0->current_data;
 227
 228           /* Outer IP header has already been stripped */
 229           u16 payload_len = rte_pktmbuf_pkt_len(mb0) - sizeof (esp_header_t) -
 230               iv_size - icv_size;
 231
 232           if ((payload_len & (BLOCK_SIZE - 1)) || (payload_len <= 0))
 233             {
 234               clib_warning ("payload %u not multiple of %d\n",
 235                             payload_len, BLOCK_SIZE);
 236               vlib_node_increment_counter (vm, dpdk_esp_decrypt_node.index,
 237                                            ESP_DECRYPT_ERROR_BAD_LEN, 1);
 238               vec_add (vec_elt (cwm->qp_data, qp_index).free_cops, &cop, 1);
 239               bi_to_enq[qp_index] -= 1;
 240               cops_to_enq[qp_index] -= 1;
 241               n_cop_qp[qp_index] -= 1;
 242               to_next[0] = bi0;
 243               to_next += 1;
 244               n_left_to_next -= 1;
 245               goto trace;
 246             }
 247
 248           struct rte_crypto_sym_op *sym_cop = (struct rte_crypto_sym_op *)(cop + 1);
 249
 250           sym_cop->m_src = mb0;
 251           sym_cop->cipher.data.offset = sizeof (esp_header_t) + iv_size;
 252           sym_cop->cipher.data.length = payload_len;
 253
 254           u8 *iv = rte_pktmbuf_mtod_offset(mb0, void*, sizeof (esp_header_t));
 255           dpdk_cop_priv_t * priv = (dpdk_cop_priv_t *)(sym_cop + 1);
 256
 257           if (sa0->crypto_alg == IPSEC_CRYPTO_ALG_AES_GCM_128)
 258             {
 259               dpdk_gcm_cnt_blk *icb = &priv->cb;
 260               icb->salt = sa0->salt;
 261               clib_memcpy(icb->iv, iv, 8);
 262               icb->cnt = clib_host_to_net_u32(1);
 263               sym_cop->cipher.iv.data = (u8 *)icb;
 264               sym_cop->cipher.iv.phys_addr = cop->phys_addr +
 265                 (uintptr_t)icb - (uintptr_t)cop;
 266               sym_cop->cipher.iv.length = 16;
 267
 268               u8 *aad = priv->aad;
 269               clib_memcpy(aad, iv - sizeof(esp_header_t), 8);
 270               sym_cop->auth.aad.data = aad;
 271               sym_cop->auth.aad.phys_addr = cop->phys_addr +
 272                   (uintptr_t)aad - (uintptr_t)cop;
 273               if (sa0->use_esn)
 274                 {
 275                   *((u32*)&aad[8]) = sa0->seq_hi;
 276                   sym_cop->auth.aad.length = 12;
 277                 }
 278               else
 279                 {
 280                   sym_cop->auth.aad.length = 8;
 281                 }
 282
 283               sym_cop->auth.digest.data = rte_pktmbuf_mtod_offset(mb0, void*,
 284                        rte_pktmbuf_pkt_len(mb0) - icv_size);
 285               sym_cop->auth.digest.phys_addr = rte_pktmbuf_mtophys_offset(mb0,
 286                        rte_pktmbuf_pkt_len(mb0) - icv_size);
 287               sym_cop->auth.digest.length = icv_size;
 288
 289             }
 290           else
 291             {
 292               sym_cop->cipher.iv.data = rte_pktmbuf_mtod_offset(mb0, void*,
 293                        sizeof (esp_header_t));
 294               sym_cop->cipher.iv.phys_addr = rte_pktmbuf_mtophys_offset(mb0,
 295                        sizeof (esp_header_t));
 296               sym_cop->cipher.iv.length = iv_size;
 297
 298               if (sa0->use_esn)
 299                 {
 300                   dpdk_cop_priv_t* priv = (dpdk_cop_priv_t*) (sym_cop + 1);
 301                   u8* payload_end = rte_pktmbuf_mtod_offset(
 302                       mb0, u8*, sizeof(esp_header_t) + iv_size + payload_len);
 303
 304                   clib_memcpy (priv->icv, payload_end, icv_size);
 305                   *((u32*) payload_end) = sa0->seq_hi;
 306                   sym_cop->auth.data.offset = 0;
 307                   sym_cop->auth.data.length = sizeof(esp_header_t) + iv_size
 308                       + payload_len + sizeof(sa0->seq_hi);
 309                   sym_cop->auth.digest.data = priv->icv;
 310                   sym_cop->auth.digest.phys_addr = cop->phys_addr
 311                       + (uintptr_t) priv->icv - (uintptr_t) cop;
 312                   sym_cop->auth.digest.length = icv_size;
 313                 }
 314               else
 315                 {
 316                   sym_cop->auth.data.offset = 0;
 317                   sym_cop->auth.data.length = sizeof(esp_header_t) +
 318                            iv_size + payload_len;
 319
 320                   sym_cop->auth.digest.data = rte_pktmbuf_mtod_offset(mb0, void*,
 321                            rte_pktmbuf_pkt_len(mb0) - icv_size);
 322                   sym_cop->auth.digest.phys_addr = rte_pktmbuf_mtophys_offset(mb0,
 323                            rte_pktmbuf_pkt_len(mb0) - icv_size);
 324                   sym_cop->auth.digest.length = icv_size;
 325                 }
 326             }
 327
 328 trace:
 329           if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
 330             {
 331               esp_decrypt_trace_t *tr = vlib_add_trace (vm, node, b0, sizeof (*tr));
 332               tr->crypto_alg = sa0->crypto_alg;
 333               tr->integ_alg = sa0->integ_alg;
 334             }
 335         }
 336       vlib_put_next_frame (vm, node, next_index, n_left_to_next);
 337     }
 338   vlib_node_increment_counter (vm, dpdk_esp_decrypt_node.index,
 339                                ESP_DECRYPT_ERROR_RX_PKTS,
 340                                from_frame->n_vectors);
 341   crypto_qp_data_t *qpd;
 342   /* *INDENT-OFF* */
 343   vec_foreach_index (i, cwm->qp_data)
 344     {
 345       u32 enq;
 346
 347       qpd = vec_elt_at_index(cwm->qp_data, i);
 348       enq = rte_cryptodev_enqueue_burst(qpd->dev_id, qpd->qp_id,
 349                                         qpd->cops, n_cop_qp[i]);
 350       qpd->inflights += enq;
 351
 352       if (PREDICT_FALSE(enq < n_cop_qp[i]))
 353         {
 354           crypto_free_cop (qpd, &qpd->cops[enq], n_cop_qp[i] - enq);
 355           vlib_buffer_free (vm, &qpd->bi[enq], n_cop_qp[i] - enq);
 356
 357           vlib_node_increment_counter (vm, dpdk_esp_decrypt_node.index,
 358                                        ESP_DECRYPT_ERROR_ENQ_FAIL,
 359                                        n_cop_qp[i] - enq);
 360         }
 361     }
 362   /* *INDENT-ON* */
 363
 364   return from_frame->n_vectors;
 365 }
 366
 367 VLIB_REGISTER_NODE (dpdk_esp_decrypt_node) = {
 368   .function = dpdk_esp_decrypt_node_fn,
 369   .name = "dpdk-esp-decrypt",
 370   .vector_size = sizeof (u32),
 371   .format_trace = format_esp_decrypt_trace,
 372   .type = VLIB_NODE_TYPE_INTERNAL,
 373
 374   .n_errors = ARRAY_LEN(esp_decrypt_error_strings),
 375   .error_strings = esp_decrypt_error_strings,
 376
 377   .n_next_nodes = ESP_DECRYPT_N_NEXT,
 378   .next_nodes = {
 379 #define _(s,n) [ESP_DECRYPT_NEXT_##s] = n,
 380     foreach_esp_decrypt_next
 381 #undef _
 382   },
 383 };
 384
 385 VLIB_NODE_FUNCTION_MULTIARCH (dpdk_esp_decrypt_node, dpdk_esp_decrypt_node_fn)
 386
 387 /*
 388  * Decrypt Post Node
 389  */
 390
 391 #define foreach_esp_decrypt_post_error        \
 392  _(PKTS, "ESP post pkts")
 393
 394 typedef enum {
 395 #define _(sym,str) ESP_DECRYPT_POST_ERROR_##sym,
 396   foreach_esp_decrypt_post_error
 397 #undef _
 398   ESP_DECRYPT_POST_N_ERROR,
 399 } esp_decrypt_post_error_t;
 400
 401 static char * esp_decrypt_post_error_strings[] = {
 402 #define _(sym,string) string,
 403   foreach_esp_decrypt_post_error
 404 #undef _
 405 };
 406
 407 vlib_node_registration_t dpdk_esp_decrypt_post_node;
 408
 409 static u8 * format_esp_decrypt_post_trace (u8 * s, va_list * args)
 410 {
 411   return s;
 412 }
 413
 414 static uword
 415 dpdk_esp_decrypt_post_node_fn (vlib_main_t * vm,
 416              vlib_node_runtime_t * node,
 417              vlib_frame_t * from_frame)
 418 {
 419   u32 n_left_from, *from, *to_next = 0, next_index;
 420   ipsec_sa_t * sa0;
 421   u32 sa_index0 = ~0;
 422   ipsec_main_t *im = &ipsec_main;
 423   dpdk_esp_main_t *em = &dpdk_esp_main;
 424
 425   from = vlib_frame_vector_args (from_frame);
 426   n_left_from = from_frame->n_vectors;
 427
 428   next_index = node->cached_next_index;
 429
 430   while (n_left_from > 0)
 431     {
 432       u32 n_left_to_next;
 433
 434       vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
 435
 436       while (n_left_from > 0 && n_left_to_next > 0)
 437         {
 438           esp_footer_t * f0;
 439           u32 bi0, next0, icv_size, iv_size;
 440           vlib_buffer_t * b0 = 0;
 441           ip4_header_t *ih4 = 0, *oh4 = 0;
 442           ip6_header_t *ih6 = 0, *oh6 = 0;
 443           u8 tunnel_mode = 1;
 444           u8 transport_ip6 = 0;
 445
 446           next0 = ESP_DECRYPT_NEXT_DROP;
 447
 448           bi0 = from[0];
 449           from += 1;
 450           n_left_from -= 1;
 451           n_left_to_next -= 1;
 452
 453           b0 = vlib_get_buffer (vm, bi0);
 454
 455           sa_index0 = vnet_buffer(b0)->ipsec.sad_index;
 456           sa0 = pool_elt_at_index (im->sad, sa_index0);
 457
 458           to_next[0] = bi0;
 459           to_next += 1;
 460
 461           icv_size = em->esp_integ_algs[sa0->integ_alg].trunc_size;
 462           iv_size = em->esp_crypto_algs[sa0->crypto_alg].iv_len;
 463
 464           if (sa0->use_anti_replay)
 465             {
 466               esp_header_t * esp0 = vlib_buffer_get_current (b0);
 467               u32 seq;
 468               seq = clib_host_to_net_u32(esp0->seq);
 469               if (PREDICT_TRUE(sa0->use_esn))
 470                 esp_replay_advance_esn(sa0, seq);
 471               else
 472                 esp_replay_advance(sa0, seq);
 473             }
 474
 475           ih4 = (ip4_header_t *) (b0->data + sizeof(ethernet_header_t));
 476           vlib_buffer_advance (b0, sizeof (esp_header_t) + iv_size);
 477
 478           b0->current_length -= (icv_size + 2);
 479           b0->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID;
 480           f0 = (esp_footer_t *) ((u8 *) vlib_buffer_get_current (b0) +
 481                                  b0->current_length);
 482           b0->current_length -= f0->pad_length;
 483
 484           /* transport mode */
 485           if (PREDICT_FALSE(!sa0->is_tunnel && !sa0->is_tunnel_ip6))
 486             {
 487               tunnel_mode = 0;
 488
 489               if (PREDICT_TRUE((ih4->ip_version_and_header_length & 0xF0) != 0x40))
 490                 {
 491                   if (PREDICT_TRUE((ih4->ip_version_and_header_length & 0xF0) == 0x60))
 492                     transport_ip6 = 1;
 493                   else
 494                     {
 495                       clib_warning("next header: 0x%x", f0->next_header);
 496                       vlib_node_increment_counter (vm, dpdk_esp_decrypt_node.index,
 497                                                    ESP_DECRYPT_ERROR_NOT_IP, 1);
 498                       goto trace;
 499                     }
 500                 }
 501             }
 502
 503           if (PREDICT_TRUE (tunnel_mode))
 504             {
 505               if (PREDICT_TRUE(f0->next_header == IP_PROTOCOL_IP_IN_IP))
 506                 next0 = ESP_DECRYPT_NEXT_IP4_INPUT;
 507               else if (f0->next_header == IP_PROTOCOL_IPV6)
 508                 next0 = ESP_DECRYPT_NEXT_IP6_INPUT;
 509               else
 510                 {
 511                   clib_warning("next header: 0x%x", f0->next_header);
 512                   vlib_node_increment_counter (vm, dpdk_esp_decrypt_node.index,
 513                                                ESP_DECRYPT_ERROR_DECRYPTION_FAILED,
 514                                                1);
 515                   goto trace;
 516                 }
 517             }
 518           /* transport mode */
 519           else
 520             {
 521               if (PREDICT_FALSE(transport_ip6))
 522                 {
 523                   ih6 = (ip6_header_t *) (b0->data + sizeof(ethernet_header_t));
 524                   vlib_buffer_advance (b0, -sizeof(ip6_header_t));
 525                   oh6 = vlib_buffer_get_current (b0);
 526                   memmove(oh6, ih6, sizeof(ip6_header_t));
 527
 528                   next0 = ESP_DECRYPT_NEXT_IP6_INPUT;
 529                   oh6->protocol = f0->next_header;
 530                   oh6->payload_length =
 531                       clib_host_to_net_u16 (
 532                           vlib_buffer_length_in_chain(vm, b0) -
 533                           sizeof (ip6_header_t));
 534                 }
 535               else
 536                 {
 537                   vlib_buffer_advance (b0, -sizeof(ip4_header_t));
 538                   oh4 = vlib_buffer_get_current (b0);
 539                   memmove(oh4, ih4, sizeof(ip4_header_t));
 540
 541                   next0 = ESP_DECRYPT_NEXT_IP4_INPUT;
 542                   oh4->ip_version_and_header_length = 0x45;
 543                   oh4->fragment_id = 0;
 544                   oh4->flags_and_fragment_offset = 0;
 545                   oh4->protocol = f0->next_header;
 546                   oh4->length = clib_host_to_net_u16 (
 547                       vlib_buffer_length_in_chain (vm, b0));
 548                   oh4->checksum = ip4_header_checksum (oh4);
 549                 }
 550             }
 551
 552           vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32)~0;
 553
 554 trace:
 555           if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
 556             {
 557               esp_decrypt_trace_t *tr = vlib_add_trace (vm, node, b0, sizeof (*tr));
 558               tr->crypto_alg = sa0->crypto_alg;
 559               tr->integ_alg = sa0->integ_alg;
 560             }
 561
 562           vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
 563                                            to_next, n_left_to_next, bi0, next0);
 564         }
 565       vlib_put_next_frame (vm, node, next_index, n_left_to_next);
 566     }
 567   vlib_node_increment_counter (vm, dpdk_esp_decrypt_post_node.index,
 568                                ESP_DECRYPT_POST_ERROR_PKTS,
 569                                from_frame->n_vectors);
 570
 571   return from_frame->n_vectors;
 572 }
 573
 574 VLIB_REGISTER_NODE (dpdk_esp_decrypt_post_node) = {
 575   .function = dpdk_esp_decrypt_post_node_fn,
 576   .name = "dpdk-esp-decrypt-post",
 577   .vector_size = sizeof (u32),
 578   .format_trace = format_esp_decrypt_post_trace,
 579   .type = VLIB_NODE_TYPE_INTERNAL,
 580
 581   .n_errors = ARRAY_LEN(esp_decrypt_post_error_strings),
 582   .error_strings = esp_decrypt_post_error_strings,
 583
 584   .n_next_nodes = ESP_DECRYPT_N_NEXT,
 585   .next_nodes = {
 586 #define _(s,n) [ESP_DECRYPT_NEXT_##s] = n,
 587     foreach_esp_decrypt_next
 588 #undef _
 589   },
 590 };
 591
 592 VLIB_NODE_FUNCTION_MULTIARCH (dpdk_esp_decrypt_post_node, dpdk_esp_decrypt_post_node_fn)