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