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