src/vnet/devices/dpdk/ipsec/esp_encrypt.c

   1 /*
   2  * esp_encrypt.c : IPSec ESP encrypt 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_encrypt_next                   \
  27 _(DROP, "error-drop")                              \
  28 _(IP4_LOOKUP, "ip4-lookup")                        \
  29 _(IP6_LOOKUP, "ip6-lookup")                        \
  30 _(INTERFACE_OUTPUT, "interface-output")
  31
  32 #define _(v, s) ESP_ENCRYPT_NEXT_##v,
  33 typedef enum
  34 {
  35   foreach_esp_encrypt_next
  36 #undef _
  37     ESP_ENCRYPT_N_NEXT,
  38 } esp_encrypt_next_t;
  39
  40 #define foreach_esp_encrypt_error                   \
  41  _(RX_PKTS, "ESP pkts received")                    \
  42  _(SEQ_CYCLED, "sequence number cycled")            \
  43  _(ENQ_FAIL, "Enqueue failed (buffer full)")        \
  44  _(NO_CRYPTODEV, "Cryptodev not configured")        \
  45  _(UNSUPPORTED, "Cipher/Auth not supported")
  46
  47
  48 typedef enum
  49 {
  50 #define _(sym,str) ESP_ENCRYPT_ERROR_##sym,
  51   foreach_esp_encrypt_error
  52 #undef _
  53     ESP_ENCRYPT_N_ERROR,
  54 } esp_encrypt_error_t;
  55
  56 static char *esp_encrypt_error_strings[] = {
  57 #define _(sym,string) string,
  58   foreach_esp_encrypt_error
  59 #undef _
  60 };
  61
  62 vlib_node_registration_t dpdk_esp_encrypt_node;
  63
  64 typedef struct
  65 {
  66   u32 spi;
  67   u32 seq;
  68   ipsec_crypto_alg_t crypto_alg;
  69   ipsec_integ_alg_t integ_alg;
  70 } esp_encrypt_trace_t;
  71
  72 /* packet trace format function */
  73 static u8 *
  74 format_esp_encrypt_trace (u8 * s, va_list * args)
  75 {
  76   CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
  77   CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
  78   esp_encrypt_trace_t *t = va_arg (*args, esp_encrypt_trace_t *);
  79
  80   s = format (s, "esp: spi %u seq %u crypto %U integrity %U",
  81               t->spi, t->seq,
  82               format_ipsec_crypto_alg, t->crypto_alg,
  83               format_ipsec_integ_alg, t->integ_alg);
  84   return s;
  85 }
  86
  87 static uword
  88 dpdk_esp_encrypt_node_fn (vlib_main_t * vm,
  89                           vlib_node_runtime_t * node,
  90                           vlib_frame_t * from_frame)
  91 {
  92   u32 n_left_from, *from, *to_next, next_index;
  93   ipsec_main_t *im = &ipsec_main;
  94   u32 cpu_index = os_get_cpu_number ();
  95   dpdk_crypto_main_t *dcm = &dpdk_crypto_main;
  96   dpdk_esp_main_t *em = &dpdk_esp_main;
  97   u32 i;
  98
  99   from = vlib_frame_vector_args (from_frame);
 100   n_left_from = from_frame->n_vectors;
 101
 102   if (PREDICT_FALSE (!dcm->workers_main))
 103     {
 104       /* Likely there are not enough cryptodevs, so drop frame */
 105       vlib_node_increment_counter (vm, dpdk_esp_encrypt_node.index,
 106                                    ESP_ENCRYPT_ERROR_NO_CRYPTODEV,
 107                                    n_left_from);
 108       vlib_buffer_free (vm, from, n_left_from);
 109       return n_left_from;
 110     }
 111
 112   crypto_worker_main_t *cwm = vec_elt_at_index (dcm->workers_main, cpu_index);
 113   u32 n_qps = vec_len (cwm->qp_data);
 114   struct rte_crypto_op **cops_to_enq[n_qps];
 115   u32 n_cop_qp[n_qps], *bi_to_enq[n_qps];
 116
 117   for (i = 0; i < n_qps; i++)
 118     {
 119       bi_to_enq[i] = cwm->qp_data[i].bi;
 120       cops_to_enq[i] = cwm->qp_data[i].cops;
 121     }
 122
 123   memset (n_cop_qp, 0, n_qps * sizeof (u32));
 124
 125   crypto_alloc_cops ();
 126
 127   next_index = ESP_ENCRYPT_NEXT_DROP;
 128
 129   while (n_left_from > 0)
 130     {
 131       u32 n_left_to_next;
 132
 133       vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
 134
 135       while (n_left_from > 0 && n_left_to_next > 0)
 136         {
 137           u32 bi0, next0;
 138           vlib_buffer_t *b0 = 0;
 139           u32 sa_index0;
 140           ipsec_sa_t *sa0;
 141           ip4_and_esp_header_t *ih0, *oh0 = 0;
 142           ip6_and_esp_header_t *ih6_0, *oh6_0 = 0;
 143           struct rte_mbuf *mb0 = 0;
 144           esp_footer_t *f0;
 145           u8 is_ipv6;
 146           u8 ip_hdr_size;
 147           u8 next_hdr_type;
 148           u8 transport_mode = 0;
 149           const int BLOCK_SIZE = 16;
 150           u32 iv_size;
 151           u16 orig_sz;
 152           crypto_sa_session_t *sa_sess;
 153           void *sess;
 154           struct rte_crypto_op *cop = 0;
 155           u16 qp_index;
 156
 157           bi0 = from[0];
 158           from += 1;
 159           n_left_from -= 1;
 160
 161           b0 = vlib_get_buffer (vm, bi0);
 162           sa_index0 = vnet_buffer (b0)->ipsec.sad_index;
 163           sa0 = pool_elt_at_index (im->sad, sa_index0);
 164
 165           if (PREDICT_FALSE (esp_seq_advance (sa0)))
 166             {
 167               clib_warning ("sequence number counter has cycled SPI %u",
 168                             sa0->spi);
 169               vlib_node_increment_counter (vm, dpdk_esp_encrypt_node.index,
 170                                            ESP_ENCRYPT_ERROR_SEQ_CYCLED, 1);
 171               //TODO: rekey SA
 172               to_next[0] = bi0;
 173               to_next += 1;
 174               n_left_to_next -= 1;
 175               goto trace;
 176             }
 177
 178           sa_sess = pool_elt_at_index (cwm->sa_sess_d[1], sa_index0);
 179           if (PREDICT_FALSE (!sa_sess->sess))
 180             {
 181               int ret = create_sym_sess (sa0, sa_sess, 1);
 182               ASSERT (ret == 0);
 183             }
 184
 185           qp_index = sa_sess->qp_index;
 186           sess = sa_sess->sess;
 187
 188           ASSERT (vec_len (vec_elt (cwm->qp_data, qp_index).free_cops) > 0);
 189           cop = vec_pop (vec_elt (cwm->qp_data, qp_index).free_cops);
 190           ASSERT (cop->status == RTE_CRYPTO_OP_STATUS_NOT_PROCESSED);
 191
 192           cops_to_enq[qp_index][0] = cop;
 193           cops_to_enq[qp_index] += 1;
 194           n_cop_qp[qp_index] += 1;
 195           bi_to_enq[qp_index][0] = bi0;
 196           bi_to_enq[qp_index] += 1;
 197
 198           ssize_t adv;
 199           iv_size = em->esp_crypto_algs[sa0->crypto_alg].iv_len;
 200           ih0 = vlib_buffer_get_current (b0);
 201           orig_sz = b0->current_length;
 202           is_ipv6 = (ih0->ip4.ip_version_and_header_length & 0xF0) == 0x60;
 203           /* is ipv6 */
 204           if (PREDICT_TRUE (sa0->is_tunnel))
 205             {
 206               if (PREDICT_TRUE (!is_ipv6))
 207                 adv = -sizeof (ip4_and_esp_header_t);
 208               else
 209                 adv = -sizeof (ip6_and_esp_header_t);
 210             }
 211           else
 212             {
 213               adv = -sizeof (esp_header_t);
 214               if (PREDICT_TRUE (!is_ipv6))
 215                 orig_sz -= sizeof (ip4_header_t);
 216               else
 217                 orig_sz -= sizeof (ip6_header_t);
 218             }
 219
 220           /*transport mode save the eth header before it is overwritten */
 221           if (PREDICT_FALSE (!sa0->is_tunnel))
 222             {
 223               ethernet_header_t *ieh0 = (ethernet_header_t *)
 224                 ((u8 *) vlib_buffer_get_current (b0) -
 225                  sizeof (ethernet_header_t));
 226               ethernet_header_t *oeh0 =
 227                 (ethernet_header_t *) ((u8 *) ieh0 + (adv - iv_size));
 228               clib_memcpy (oeh0, ieh0, sizeof (ethernet_header_t));
 229             }
 230
 231           vlib_buffer_advance (b0, adv - iv_size);
 232
 233           /* XXX IP6/ip4 and IP4/IP6 not supported, only IP4/IP4 and IP6/IP6 */
 234
 235           /* is ipv6 */
 236           if (PREDICT_FALSE (is_ipv6))
 237             {
 238               ih6_0 = (ip6_and_esp_header_t *) ih0;
 239               ip_hdr_size = sizeof (ip6_header_t);
 240               oh6_0 = vlib_buffer_get_current (b0);
 241
 242               if (PREDICT_TRUE (sa0->is_tunnel))
 243                 {
 244                   next_hdr_type = IP_PROTOCOL_IPV6;
 245                   oh6_0->ip6.ip_version_traffic_class_and_flow_label =
 246                     ih6_0->ip6.ip_version_traffic_class_and_flow_label;
 247                 }
 248               else
 249                 {
 250                   next_hdr_type = ih6_0->ip6.protocol;
 251                   memmove (oh6_0, ih6_0, sizeof (ip6_header_t));
 252                 }
 253
 254               oh6_0->ip6.protocol = IP_PROTOCOL_IPSEC_ESP;
 255               oh6_0->ip6.hop_limit = 254;
 256               oh6_0->esp.spi = clib_net_to_host_u32 (sa0->spi);
 257               oh6_0->esp.seq = clib_net_to_host_u32 (sa0->seq);
 258             }
 259           else
 260             {
 261               ip_hdr_size = sizeof (ip4_header_t);
 262               oh0 = vlib_buffer_get_current (b0);
 263
 264               if (PREDICT_TRUE (sa0->is_tunnel))
 265                 {
 266                   next_hdr_type = IP_PROTOCOL_IP_IN_IP;
 267                   oh0->ip4.tos = ih0->ip4.tos;
 268                 }
 269               else
 270                 {
 271                   next_hdr_type = ih0->ip4.protocol;
 272                   memmove (oh0, ih0, sizeof (ip4_header_t));
 273                 }
 274
 275               oh0->ip4.ip_version_and_header_length = 0x45;
 276               oh0->ip4.fragment_id = 0;
 277               oh0->ip4.flags_and_fragment_offset = 0;
 278               oh0->ip4.ttl = 254;
 279               oh0->ip4.protocol = IP_PROTOCOL_IPSEC_ESP;
 280               oh0->esp.spi = clib_net_to_host_u32 (sa0->spi);
 281               oh0->esp.seq = clib_net_to_host_u32 (sa0->seq);
 282             }
 283
 284           if (PREDICT_TRUE (sa0->is_tunnel && !sa0->is_tunnel_ip6))
 285             {
 286               oh0->ip4.src_address.as_u32 = sa0->tunnel_src_addr.ip4.as_u32;
 287               oh0->ip4.dst_address.as_u32 = sa0->tunnel_dst_addr.ip4.as_u32;
 288
 289               /* in tunnel mode send it back to FIB */
 290               next0 = ESP_ENCRYPT_NEXT_IP4_LOOKUP;
 291               vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
 292             }
 293           else if (sa0->is_tunnel && sa0->is_tunnel_ip6)
 294             {
 295               oh6_0->ip6.src_address.as_u64[0] =
 296                 sa0->tunnel_src_addr.ip6.as_u64[0];
 297               oh6_0->ip6.src_address.as_u64[1] =
 298                 sa0->tunnel_src_addr.ip6.as_u64[1];
 299               oh6_0->ip6.dst_address.as_u64[0] =
 300                 sa0->tunnel_dst_addr.ip6.as_u64[0];
 301               oh6_0->ip6.dst_address.as_u64[1] =
 302                 sa0->tunnel_dst_addr.ip6.as_u64[1];
 303
 304               /* in tunnel mode send it back to FIB */
 305               next0 = ESP_ENCRYPT_NEXT_IP6_LOOKUP;
 306               vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
 307             }
 308           else
 309             {
 310               next0 = ESP_ENCRYPT_NEXT_INTERFACE_OUTPUT;
 311               transport_mode = 1;
 312             }
 313
 314           ASSERT (sa0->crypto_alg < IPSEC_CRYPTO_N_ALG);
 315           ASSERT (sa0->crypto_alg != IPSEC_CRYPTO_ALG_NONE);
 316
 317           int blocks = 1 + (orig_sz + 1) / BLOCK_SIZE;
 318
 319           /* pad packet in input buffer */
 320           u8 pad_bytes = BLOCK_SIZE * blocks - 2 - orig_sz;
 321           u8 i;
 322           u8 *padding = vlib_buffer_get_current (b0) + b0->current_length;
 323
 324           for (i = 0; i < pad_bytes; ++i)
 325             padding[i] = i + 1;
 326
 327           f0 = vlib_buffer_get_current (b0) + b0->current_length + pad_bytes;
 328           f0->pad_length = pad_bytes;
 329           f0->next_header = next_hdr_type;
 330           b0->current_length += pad_bytes + 2 +
 331             em->esp_integ_algs[sa0->integ_alg].trunc_size;
 332
 333           vnet_buffer (b0)->sw_if_index[VLIB_RX] =
 334             vnet_buffer (b0)->sw_if_index[VLIB_RX];
 335           b0->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
 336
 337           struct rte_crypto_sym_op *sym_cop;
 338           sym_cop = (struct rte_crypto_sym_op *) (cop + 1);
 339
 340           dpdk_cop_priv_t *priv = (dpdk_cop_priv_t *) (sym_cop + 1);
 341
 342           vnet_buffer (b0)->unused[0] = next0;
 343
 344           mb0 = rte_mbuf_from_vlib_buffer (b0);
 345           mb0->data_len = b0->current_length;
 346           mb0->pkt_len = b0->current_length;
 347           mb0->data_off = RTE_PKTMBUF_HEADROOM + b0->current_data;
 348
 349           rte_crypto_op_attach_sym_session (cop, sess);
 350
 351           sym_cop->m_src = mb0;
 352
 353           dpdk_gcm_cnt_blk *icb = &priv->cb;
 354           icb->salt = sa0->salt;
 355           icb->iv[0] = sa0->seq;
 356           icb->iv[1] = sa0->seq_hi;
 357
 358           if (sa0->crypto_alg == IPSEC_CRYPTO_ALG_AES_GCM_128)
 359             {
 360               icb->cnt = clib_host_to_net_u32 (1);
 361               clib_memcpy (vlib_buffer_get_current (b0) + ip_hdr_size +
 362                            sizeof (esp_header_t), icb->iv, 8);
 363               sym_cop->cipher.data.offset =
 364                 ip_hdr_size + sizeof (esp_header_t) + iv_size;
 365               sym_cop->cipher.data.length = BLOCK_SIZE * blocks;
 366               sym_cop->cipher.iv.length = 16;
 367             }
 368           else
 369             {
 370               sym_cop->cipher.data.offset =
 371                 ip_hdr_size + sizeof (esp_header_t);
 372               sym_cop->cipher.data.length = BLOCK_SIZE * blocks + iv_size;
 373               sym_cop->cipher.iv.length = iv_size;
 374             }
 375
 376           sym_cop->cipher.iv.data = (u8 *) icb;
 377           sym_cop->cipher.iv.phys_addr = cop->phys_addr + (uintptr_t) icb
 378             - (uintptr_t) cop;
 379
 380
 381           ASSERT (sa0->integ_alg < IPSEC_INTEG_N_ALG);
 382           ASSERT (sa0->integ_alg != IPSEC_INTEG_ALG_NONE);
 383
 384           if (PREDICT_FALSE (sa0->integ_alg == IPSEC_INTEG_ALG_AES_GCM_128))
 385             {
 386               u8 *aad = priv->aad;
 387               clib_memcpy (aad, vlib_buffer_get_current (b0) + ip_hdr_size,
 388                            8);
 389               sym_cop->auth.aad.data = aad;
 390               sym_cop->auth.aad.phys_addr = cop->phys_addr +
 391                 (uintptr_t) aad - (uintptr_t) cop;
 392
 393               if (PREDICT_FALSE (sa0->use_esn))
 394                 {
 395                   *((u32 *) & aad[8]) = sa0->seq_hi;
 396                   sym_cop->auth.aad.length = 12;
 397                 }
 398               else
 399                 {
 400                   sym_cop->auth.aad.length = 8;
 401                 }
 402             }
 403           else
 404             {
 405               sym_cop->auth.data.offset = ip_hdr_size;
 406               sym_cop->auth.data.length = b0->current_length - ip_hdr_size
 407                 - em->esp_integ_algs[sa0->integ_alg].trunc_size;
 408
 409               if (PREDICT_FALSE (sa0->use_esn))
 410                 {
 411                   u8 *payload_end =
 412                     vlib_buffer_get_current (b0) + b0->current_length;
 413                   *((u32 *) payload_end) = sa0->seq_hi;
 414                   sym_cop->auth.data.length += sizeof (sa0->seq_hi);
 415                 }
 416             }
 417           sym_cop->auth.digest.data = vlib_buffer_get_current (b0) +
 418             b0->current_length -
 419             em->esp_integ_algs[sa0->integ_alg].trunc_size;
 420           sym_cop->auth.digest.phys_addr = rte_pktmbuf_mtophys_offset (mb0,
 421                                                                        b0->current_length
 422                                                                        -
 423                                                                        em->esp_integ_algs
 424                                                                        [sa0->integ_alg].trunc_size);
 425           sym_cop->auth.digest.length =
 426             em->esp_integ_algs[sa0->integ_alg].trunc_size;
 427
 428
 429           if (PREDICT_FALSE (is_ipv6))
 430             {
 431               oh6_0->ip6.payload_length =
 432                 clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0) -
 433                                       sizeof (ip6_header_t));
 434             }
 435           else
 436             {
 437               oh0->ip4.length =
 438                 clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0));
 439               oh0->ip4.checksum = ip4_header_checksum (&oh0->ip4);
 440             }
 441
 442           if (transport_mode)
 443             vlib_buffer_advance (b0, -sizeof (ethernet_header_t));
 444
 445         trace:
 446           if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
 447             {
 448               esp_encrypt_trace_t *tr =
 449                 vlib_add_trace (vm, node, b0, sizeof (*tr));
 450               tr->spi = sa0->spi;
 451               tr->seq = sa0->seq - 1;
 452               tr->crypto_alg = sa0->crypto_alg;
 453               tr->integ_alg = sa0->integ_alg;
 454             }
 455         }
 456       vlib_put_next_frame (vm, node, next_index, n_left_to_next);
 457     }
 458   vlib_node_increment_counter (vm, dpdk_esp_encrypt_node.index,
 459                                ESP_ENCRYPT_ERROR_RX_PKTS,
 460                                from_frame->n_vectors);
 461   crypto_qp_data_t *qpd;
 462   /* *INDENT-OFF* */
 463   vec_foreach_index (i, cwm->qp_data)
 464     {
 465       u32 enq;
 466
 467       qpd = vec_elt_at_index(cwm->qp_data, i);
 468       enq = rte_cryptodev_enqueue_burst(qpd->dev_id, qpd->qp_id,
 469                                         qpd->cops, n_cop_qp[i]);
 470       qpd->inflights += enq;
 471
 472       if (PREDICT_FALSE(enq < n_cop_qp[i]))
 473         {
 474           crypto_free_cop (qpd, &qpd->cops[enq], n_cop_qp[i] - enq);
 475           vlib_buffer_free (vm, &qpd->bi[enq], n_cop_qp[i] - enq);
 476
 477           vlib_node_increment_counter (vm, dpdk_esp_encrypt_node.index,
 478                                        ESP_ENCRYPT_ERROR_ENQ_FAIL,
 479                                        n_cop_qp[i] - enq);
 480         }
 481     }
 482   /* *INDENT-ON* */
 483
 484   return from_frame->n_vectors;
 485 }
 486
 487 VLIB_REGISTER_NODE (dpdk_esp_encrypt_node) =
 488 {
 489   .function = dpdk_esp_encrypt_node_fn,.name = "dpdk-esp-encrypt",.flags =
 490     VLIB_NODE_FLAG_IS_OUTPUT,.vector_size = sizeof (u32),.format_trace =
 491     format_esp_encrypt_trace,.n_errors =
 492     ARRAY_LEN (esp_encrypt_error_strings),.error_strings =
 493     esp_encrypt_error_strings,.n_next_nodes = 1,.next_nodes =
 494   {
 495   [ESP_ENCRYPT_NEXT_DROP] = "error-drop",}
 496 };
 497
 498 VLIB_NODE_FUNCTION_MULTIARCH (dpdk_esp_encrypt_node, dpdk_esp_encrypt_node_fn)
 499 /*
 500  * ESP Encrypt Post Node
 501  */
 502 #define foreach_esp_encrypt_post_error              \
 503  _(PKTS, "ESP post pkts")
 504      typedef enum
 505      {
 506 #define _(sym,str) ESP_ENCRYPT_POST_ERROR_##sym,
 507        foreach_esp_encrypt_post_error
 508 #undef _
 509          ESP_ENCRYPT_POST_N_ERROR,
 510      } esp_encrypt_post_error_t;
 511
 512      static char *esp_encrypt_post_error_strings[] = {
 513 #define _(sym,string) string,
 514        foreach_esp_encrypt_post_error
 515 #undef _
 516      };
 517
 518 vlib_node_registration_t dpdk_esp_encrypt_post_node;
 519
 520 static u8 *
 521 format_esp_encrypt_post_trace (u8 * s, va_list * args)
 522 {
 523   return s;
 524 }
 525
 526 static uword
 527 dpdk_esp_encrypt_post_node_fn (vlib_main_t * vm,
 528                                vlib_node_runtime_t * node,
 529                                vlib_frame_t * from_frame)
 530 {
 531   u32 n_left_from, *from, *to_next = 0, next_index;
 532
 533   from = vlib_frame_vector_args (from_frame);
 534   n_left_from = from_frame->n_vectors;
 535
 536   next_index = node->cached_next_index;
 537
 538   while (n_left_from > 0)
 539     {
 540       u32 n_left_to_next;
 541
 542       vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
 543
 544       while (n_left_from > 0 && n_left_to_next > 0)
 545         {
 546           u32 bi0, next0;
 547           vlib_buffer_t *b0 = 0;
 548
 549           bi0 = from[0];
 550           from += 1;
 551           n_left_from -= 1;
 552           n_left_to_next -= 1;
 553
 554           b0 = vlib_get_buffer (vm, bi0);
 555
 556           to_next[0] = bi0;
 557           to_next += 1;
 558
 559           next0 = vnet_buffer (b0)->unused[0];
 560
 561           vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
 562                                            to_next, n_left_to_next, bi0,
 563                                            next0);
 564         }
 565       vlib_put_next_frame (vm, node, next_index, n_left_to_next);
 566     }
 567
 568   vlib_node_increment_counter (vm, dpdk_esp_encrypt_post_node.index,
 569                                ESP_ENCRYPT_POST_ERROR_PKTS,
 570                                from_frame->n_vectors);
 571
 572   return from_frame->n_vectors;
 573 }
 574
 575 VLIB_REGISTER_NODE (dpdk_esp_encrypt_post_node) =
 576 {
 577   .function = dpdk_esp_encrypt_post_node_fn,.name =
 578     "dpdk-esp-encrypt-post",.vector_size = sizeof (u32),.format_trace =
 579     format_esp_encrypt_post_trace,.type = VLIB_NODE_TYPE_INTERNAL,.n_errors =
 580     ARRAY_LEN (esp_encrypt_post_error_strings),.error_strings =
 581     esp_encrypt_post_error_strings,.n_next_nodes =
 582     ESP_ENCRYPT_N_NEXT,.next_nodes =
 583   {
 584 #define _(s,n) [ESP_ENCRYPT_NEXT_##s] = n,
 585     foreach_esp_encrypt_next
 586 #undef _
 587   }
 588 };
 589
 590 VLIB_NODE_FUNCTION_MULTIARCH (dpdk_esp_encrypt_post_node,
 591                               dpdk_esp_encrypt_post_node_fn)
 592 /*
 593  * fd.io coding-style-patch-verification: ON
 594  *
 595  * Local Variables:
 596  * eval: (c-set-style "gnu")
 597  * End:
 598  */