src/plugins/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 <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_encrypt_next                   \
  29 _(DROP, "error-drop")                              \
  30 _(IP4_LOOKUP, "ip4-lookup")                        \
  31 _(IP6_LOOKUP, "ip6-lookup")                        \
  32 _(INTERFACE_OUTPUT, "interface-output")
  33
  34 #define _(v, s) ESP_ENCRYPT_NEXT_##v,
  35 typedef enum
  36 {
  37   foreach_esp_encrypt_next
  38 #undef _
  39     ESP_ENCRYPT_N_NEXT,
  40 } esp_encrypt_next_t;
  41
  42 #define foreach_esp_encrypt_error                   \
  43  _(RX_PKTS, "ESP pkts received")                    \
  44  _(SEQ_CYCLED, "sequence number cycled")            \
  45  _(ENQ_FAIL, "Enqueue failed (buffer full)")        \
  46  _(NO_CRYPTODEV, "Cryptodev not configured")        \
  47  _(UNSUPPORTED, "Cipher/Auth not supported")
  48
  49
  50 typedef enum
  51 {
  52 #define _(sym,str) ESP_ENCRYPT_ERROR_##sym,
  53   foreach_esp_encrypt_error
  54 #undef _
  55     ESP_ENCRYPT_N_ERROR,
  56 } esp_encrypt_error_t;
  57
  58 static char *esp_encrypt_error_strings[] = {
  59 #define _(sym,string) string,
  60   foreach_esp_encrypt_error
  61 #undef _
  62 };
  63
  64 vlib_node_registration_t dpdk_esp_encrypt_node;
  65
  66 typedef struct
  67 {
  68   u32 spi;
  69   u32 seq;
  70   ipsec_crypto_alg_t crypto_alg;
  71   ipsec_integ_alg_t integ_alg;
  72 } esp_encrypt_trace_t;
  73
  74 /* packet trace format function */
  75 static u8 *
  76 format_esp_encrypt_trace (u8 * s, va_list * args)
  77 {
  78   CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
  79   CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
  80   esp_encrypt_trace_t *t = va_arg (*args, esp_encrypt_trace_t *);
  81
  82   s = format (s, "esp: spi %u seq %u crypto %U integrity %U",
  83               t->spi, t->seq,
  84               format_ipsec_crypto_alg, t->crypto_alg,
  85               format_ipsec_integ_alg, t->integ_alg);
  86   return s;
  87 }
  88
  89 static uword
  90 dpdk_esp_encrypt_node_fn (vlib_main_t * vm,
  91                           vlib_node_runtime_t * node,
  92                           vlib_frame_t * from_frame)
  93 {
  94   u32 n_left_from, *from, *to_next, next_index;
  95   ipsec_main_t *im = &ipsec_main;
  96   u32 thread_index = vlib_get_thread_index ();
  97   dpdk_crypto_main_t *dcm = &dpdk_crypto_main;
  98   dpdk_esp_main_t *em = &dpdk_esp_main;
  99   u32 i;
 100
 101   from = vlib_frame_vector_args (from_frame);
 102   n_left_from = from_frame->n_vectors;
 103
 104   crypto_worker_main_t *cwm =
 105     vec_elt_at_index (dcm->workers_main, thread_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_ENCRYPT_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, next0;
 131           vlib_buffer_t *b0 = 0;
 132           u32 sa_index0;
 133           ipsec_sa_t *sa0;
 134           ip4_and_esp_header_t *ih0, *oh0 = 0;
 135           ip6_and_esp_header_t *ih6_0, *oh6_0 = 0;
 136           struct rte_mbuf *mb0 = 0;
 137           esp_footer_t *f0;
 138           u8 is_ipv6;
 139           u8 ip_hdr_size;
 140           u8 next_hdr_type;
 141           u8 transport_mode = 0;
 142           const int BLOCK_SIZE = 16;
 143           u32 iv_size;
 144           u16 orig_sz;
 145           crypto_sa_session_t *sa_sess;
 146           void *sess;
 147           struct rte_crypto_op *cop = 0;
 148           u16 qp_index;
 149
 150           bi0 = from[0];
 151           from += 1;
 152           n_left_from -= 1;
 153
 154           b0 = vlib_get_buffer (vm, bi0);
 155           sa_index0 = vnet_buffer (b0)->ipsec.sad_index;
 156           sa0 = pool_elt_at_index (im->sad, sa_index0);
 157
 158           if (PREDICT_FALSE (esp_seq_advance (sa0)))
 159             {
 160               clib_warning ("sequence number counter has cycled SPI %u",
 161                             sa0->spi);
 162               vlib_node_increment_counter (vm, dpdk_esp_encrypt_node.index,
 163                                            ESP_ENCRYPT_ERROR_SEQ_CYCLED, 1);
 164               //TODO: rekey SA
 165               to_next[0] = bi0;
 166               to_next += 1;
 167               n_left_to_next -= 1;
 168               goto trace;
 169             }
 170
 171           sa0->total_data_size += b0->current_length;
 172
 173           sa_sess = pool_elt_at_index (cwm->sa_sess_d[1], sa_index0);
 174           if (PREDICT_FALSE (!sa_sess->sess))
 175             {
 176               int ret = create_sym_sess (sa0, sa_sess, 1);
 177
 178               if (PREDICT_FALSE (ret))
 179                 {
 180                   to_next[0] = bi0;
 181                   to_next += 1;
 182                   n_left_to_next -= 1;
 183                   goto trace;
 184                 }
 185             }
 186
 187           qp_index = sa_sess->qp_index;
 188           sess = sa_sess->sess;
 189
 190           ASSERT (vec_len (vec_elt (cwm->qp_data, qp_index).free_cops) > 0);
 191           cop = vec_pop (vec_elt (cwm->qp_data, qp_index).free_cops);
 192           ASSERT (cop->status == RTE_CRYPTO_OP_STATUS_NOT_PROCESSED);
 193
 194           cops_to_enq[qp_index][0] = cop;
 195           cops_to_enq[qp_index] += 1;
 196           n_cop_qp[qp_index] += 1;
 197           bi_to_enq[qp_index][0] = bi0;
 198           bi_to_enq[qp_index] += 1;
 199
 200           ssize_t adv;
 201           iv_size = em->esp_crypto_algs[sa0->crypto_alg].iv_len;
 202           ih0 = vlib_buffer_get_current (b0);
 203           orig_sz = b0->current_length;
 204           is_ipv6 = (ih0->ip4.ip_version_and_header_length & 0xF0) == 0x60;
 205           /* is ipv6 */
 206           if (PREDICT_TRUE (sa0->is_tunnel))
 207             {
 208               if (PREDICT_TRUE (!is_ipv6))
 209                 adv = -sizeof (ip4_and_esp_header_t);
 210               else
 211                 adv = -sizeof (ip6_and_esp_header_t);
 212             }
 213           else
 214             {
 215               adv = -sizeof (esp_header_t);
 216               if (PREDICT_TRUE (!is_ipv6))
 217                 orig_sz -= sizeof (ip4_header_t);
 218               else
 219                 orig_sz -= sizeof (ip6_header_t);
 220             }
 221
 222           /*transport mode save the eth header before it is overwritten */
 223           if (PREDICT_FALSE (!sa0->is_tunnel))
 224             {
 225               ethernet_header_t *ieh0 = (ethernet_header_t *)
 226                 ((u8 *) vlib_buffer_get_current (b0) -
 227                  sizeof (ethernet_header_t));
 228               ethernet_header_t *oeh0 =
 229                 (ethernet_header_t *) ((u8 *) ieh0 + (adv - iv_size));
 230               clib_memcpy (oeh0, ieh0, sizeof (ethernet_header_t));
 231             }
 232
 233           vlib_buffer_advance (b0, adv - iv_size);
 234
 235           /* XXX IP6/ip4 and IP4/IP6 not supported, only IP4/IP4 and IP6/IP6 */
 236
 237           /* is ipv6 */
 238           if (PREDICT_FALSE (is_ipv6))
 239             {
 240               ih6_0 = (ip6_and_esp_header_t *) ih0;
 241               ip_hdr_size = sizeof (ip6_header_t);
 242               oh6_0 = vlib_buffer_get_current (b0);
 243
 244               if (PREDICT_TRUE (sa0->is_tunnel))
 245                 {
 246                   next_hdr_type = IP_PROTOCOL_IPV6;
 247                   oh6_0->ip6.ip_version_traffic_class_and_flow_label =
 248                     ih6_0->ip6.ip_version_traffic_class_and_flow_label;
 249                 }
 250               else
 251                 {
 252                   next_hdr_type = ih6_0->ip6.protocol;
 253                   memmove (oh6_0, ih6_0, sizeof (ip6_header_t));
 254                 }
 255
 256               oh6_0->ip6.protocol = IP_PROTOCOL_IPSEC_ESP;
 257               oh6_0->ip6.hop_limit = 254;
 258               oh6_0->esp.spi = clib_net_to_host_u32 (sa0->spi);
 259               oh6_0->esp.seq = clib_net_to_host_u32 (sa0->seq);
 260             }
 261           else
 262             {
 263               ip_hdr_size = sizeof (ip4_header_t);
 264               oh0 = vlib_buffer_get_current (b0);
 265
 266               if (PREDICT_TRUE (sa0->is_tunnel))
 267                 {
 268                   next_hdr_type = IP_PROTOCOL_IP_IN_IP;
 269                   oh0->ip4.tos = ih0->ip4.tos;
 270                 }
 271               else
 272                 {
 273                   next_hdr_type = ih0->ip4.protocol;
 274                   memmove (oh0, ih0, sizeof (ip4_header_t));
 275                 }
 276
 277               oh0->ip4.ip_version_and_header_length = 0x45;
 278               oh0->ip4.fragment_id = 0;
 279               oh0->ip4.flags_and_fragment_offset = 0;
 280               oh0->ip4.ttl = 254;
 281               oh0->ip4.protocol = IP_PROTOCOL_IPSEC_ESP;
 282               oh0->esp.spi = clib_net_to_host_u32 (sa0->spi);
 283               oh0->esp.seq = clib_net_to_host_u32 (sa0->seq);
 284             }
 285
 286           if (PREDICT_TRUE
 287               (!is_ipv6 && sa0->is_tunnel && !sa0->is_tunnel_ip6))
 288             {
 289               oh0->ip4.src_address.as_u32 = sa0->tunnel_src_addr.ip4.as_u32;
 290               oh0->ip4.dst_address.as_u32 = sa0->tunnel_dst_addr.ip4.as_u32;
 291
 292               /* in tunnel mode send it back to FIB */
 293               next0 = ESP_ENCRYPT_NEXT_IP4_LOOKUP;
 294               vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
 295             }
 296           else if (is_ipv6 && sa0->is_tunnel && sa0->is_tunnel_ip6)
 297             {
 298               oh6_0->ip6.src_address.as_u64[0] =
 299                 sa0->tunnel_src_addr.ip6.as_u64[0];
 300               oh6_0->ip6.src_address.as_u64[1] =
 301                 sa0->tunnel_src_addr.ip6.as_u64[1];
 302               oh6_0->ip6.dst_address.as_u64[0] =
 303                 sa0->tunnel_dst_addr.ip6.as_u64[0];
 304               oh6_0->ip6.dst_address.as_u64[1] =
 305                 sa0->tunnel_dst_addr.ip6.as_u64[1];
 306
 307               /* in tunnel mode send it back to FIB */
 308               next0 = ESP_ENCRYPT_NEXT_IP6_LOOKUP;
 309               vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
 310             }
 311           else
 312             {
 313               next0 = ESP_ENCRYPT_NEXT_INTERFACE_OUTPUT;
 314               transport_mode = 1;
 315             }
 316
 317           ASSERT (sa0->crypto_alg < IPSEC_CRYPTO_N_ALG);
 318           ASSERT (sa0->crypto_alg != IPSEC_CRYPTO_ALG_NONE);
 319
 320           int blocks = 1 + (orig_sz + 1) / BLOCK_SIZE;
 321
 322           /* pad packet in input buffer */
 323           u8 pad_bytes = BLOCK_SIZE * blocks - 2 - orig_sz;
 324           u8 i;
 325           u8 *padding = vlib_buffer_get_current (b0) + b0->current_length;
 326
 327           for (i = 0; i < pad_bytes; ++i)
 328             padding[i] = i + 1;
 329
 330           f0 = vlib_buffer_get_current (b0) + b0->current_length + pad_bytes;
 331           f0->pad_length = pad_bytes;
 332           f0->next_header = next_hdr_type;
 333           b0->current_length += pad_bytes + 2 +
 334             em->esp_integ_algs[sa0->integ_alg].trunc_size;
 335
 336           vnet_buffer (b0)->sw_if_index[VLIB_RX] =
 337             vnet_buffer (b0)->sw_if_index[VLIB_RX];
 338           b0->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
 339
 340           struct rte_crypto_sym_op *sym_cop;
 341           sym_cop = (struct rte_crypto_sym_op *) (cop + 1);
 342
 343           dpdk_cop_priv_t *priv = (dpdk_cop_priv_t *) (sym_cop + 1);
 344
 345           vnet_buffer (b0)->unused[0] = next0;
 346
 347           mb0 = rte_mbuf_from_vlib_buffer (b0);
 348           mb0->data_len = b0->current_length;
 349           mb0->pkt_len = b0->current_length;
 350           mb0->data_off = RTE_PKTMBUF_HEADROOM + b0->current_data;
 351
 352           rte_crypto_op_attach_sym_session (cop, sess);
 353
 354           sym_cop->m_src = mb0;
 355
 356           dpdk_gcm_cnt_blk *icb = &priv->cb;
 357           icb->salt = sa0->salt;
 358           icb->iv[0] = sa0->seq;
 359           icb->iv[1] = sa0->seq_hi;
 360           icb->cnt = clib_host_to_net_u32 (1);
 361
 362           if (sa0->crypto_alg == IPSEC_CRYPTO_ALG_AES_GCM_128)
 363             {
 364               u32 *esp_iv =
 365                 (u32 *) vlib_buffer_get_current (b0) + ip_hdr_size +
 366                 sizeof (esp_header_t);
 367               esp_iv[0] = sa0->seq;
 368               esp_iv[1] = sa0->seq_hi;
 369               sym_cop->cipher.data.offset =
 370                 ip_hdr_size + sizeof (esp_header_t) + iv_size;
 371               sym_cop->cipher.data.length = BLOCK_SIZE * blocks;
 372               sym_cop->cipher.iv.length = 16;
 373             }
 374           else
 375             {
 376               sym_cop->cipher.data.offset =
 377                 ip_hdr_size + sizeof (esp_header_t);
 378               sym_cop->cipher.data.length = BLOCK_SIZE * blocks + iv_size;
 379               sym_cop->cipher.iv.length = iv_size;
 380             }
 381
 382           sym_cop->cipher.iv.data = (u8 *) icb;
 383           sym_cop->cipher.iv.phys_addr = cop->phys_addr + (uintptr_t) icb
 384             - (uintptr_t) cop;
 385
 386
 387           ASSERT (sa0->integ_alg < IPSEC_INTEG_N_ALG);
 388           ASSERT (sa0->integ_alg != IPSEC_INTEG_ALG_NONE);
 389
 390           if (PREDICT_FALSE (sa0->integ_alg == IPSEC_INTEG_ALG_AES_GCM_128))
 391             {
 392               u8 *aad = priv->aad;
 393               clib_memcpy (aad, vlib_buffer_get_current (b0) + ip_hdr_size,
 394                            8);
 395               sym_cop->auth.aad.data = aad;
 396               sym_cop->auth.aad.phys_addr = cop->phys_addr +
 397                 (uintptr_t) aad - (uintptr_t) cop;
 398
 399               if (PREDICT_FALSE (sa0->use_esn))
 400                 {
 401                   *((u32 *) & aad[8]) = sa0->seq_hi;
 402                   sym_cop->auth.aad.length = 12;
 403                 }
 404               else
 405                 {
 406                   sym_cop->auth.aad.length = 8;
 407                 }
 408             }
 409           else
 410             {
 411               sym_cop->auth.data.offset = ip_hdr_size;
 412               sym_cop->auth.data.length = b0->current_length - ip_hdr_size
 413                 - em->esp_integ_algs[sa0->integ_alg].trunc_size;
 414
 415               if (PREDICT_FALSE (sa0->use_esn))
 416                 {
 417                   u8 *payload_end =
 418                     vlib_buffer_get_current (b0) + b0->current_length;
 419                   *((u32 *) payload_end) = sa0->seq_hi;
 420                   sym_cop->auth.data.length += sizeof (sa0->seq_hi);
 421                 }
 422             }
 423           sym_cop->auth.digest.data = vlib_buffer_get_current (b0) +
 424             b0->current_length -
 425             em->esp_integ_algs[sa0->integ_alg].trunc_size;
 426           sym_cop->auth.digest.phys_addr = rte_pktmbuf_mtophys_offset (mb0,
 427                                                                        b0->current_length
 428                                                                        -
 429                                                                        em->esp_integ_algs
 430                                                                        [sa0->integ_alg].trunc_size);
 431           sym_cop->auth.digest.length =
 432             em->esp_integ_algs[sa0->integ_alg].trunc_size;
 433
 434
 435           if (PREDICT_FALSE (is_ipv6))
 436             {
 437               oh6_0->ip6.payload_length =
 438                 clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0) -
 439                                       sizeof (ip6_header_t));
 440             }
 441           else
 442             {
 443               oh0->ip4.length =
 444                 clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0));
 445               oh0->ip4.checksum = ip4_header_checksum (&oh0->ip4);
 446             }
 447
 448           if (transport_mode)
 449             vlib_buffer_advance (b0, -sizeof (ethernet_header_t));
 450
 451         trace:
 452           if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
 453             {
 454               esp_encrypt_trace_t *tr =
 455                 vlib_add_trace (vm, node, b0, sizeof (*tr));
 456               tr->spi = sa0->spi;
 457               tr->seq = sa0->seq - 1;
 458               tr->crypto_alg = sa0->crypto_alg;
 459               tr->integ_alg = sa0->integ_alg;
 460             }
 461         }
 462       vlib_put_next_frame (vm, node, next_index, n_left_to_next);
 463     }
 464   vlib_node_increment_counter (vm, dpdk_esp_encrypt_node.index,
 465                                ESP_ENCRYPT_ERROR_RX_PKTS,
 466                                from_frame->n_vectors);
 467   crypto_qp_data_t *qpd;
 468   /* *INDENT-OFF* */
 469   vec_foreach_index (i, cwm->qp_data)
 470     {
 471       u32 enq;
 472
 473       qpd = vec_elt_at_index(cwm->qp_data, i);
 474       enq = rte_cryptodev_enqueue_burst(qpd->dev_id, qpd->qp_id,
 475                                         qpd->cops, n_cop_qp[i]);
 476       qpd->inflights += enq;
 477
 478       if (PREDICT_FALSE(enq < n_cop_qp[i]))
 479         {
 480           crypto_free_cop (qpd, &qpd->cops[enq], n_cop_qp[i] - enq);
 481           vlib_buffer_free (vm, &qpd->bi[enq], n_cop_qp[i] - enq);
 482
 483           vlib_node_increment_counter (vm, dpdk_esp_encrypt_node.index,
 484                                        ESP_ENCRYPT_ERROR_ENQ_FAIL,
 485                                        n_cop_qp[i] - enq);
 486         }
 487     }
 488   /* *INDENT-ON* */
 489
 490   return from_frame->n_vectors;
 491 }
 492
 493 /* *INDENT-OFF* */
 494 VLIB_REGISTER_NODE (dpdk_esp_encrypt_node) = {
 495   .function = dpdk_esp_encrypt_node_fn,
 496   .name = "dpdk-esp-encrypt",
 497   .flags = VLIB_NODE_FLAG_IS_OUTPUT,
 498   .vector_size = sizeof (u32),
 499   .format_trace = format_esp_encrypt_trace,
 500   .n_errors = ARRAY_LEN (esp_encrypt_error_strings),
 501   .error_strings = esp_encrypt_error_strings,
 502   .n_next_nodes = 1,
 503   .next_nodes =
 504     {
 505       [ESP_ENCRYPT_NEXT_DROP] = "error-drop",
 506     }
 507 };
 508 /* *INDENT-ON* */
 509
 510 VLIB_NODE_FUNCTION_MULTIARCH (dpdk_esp_encrypt_node, dpdk_esp_encrypt_node_fn)
 511 /*
 512  * ESP Encrypt Post Node
 513  */
 514 #define foreach_esp_encrypt_post_error              \
 515  _(PKTS, "ESP post pkts")
 516      typedef enum
 517      {
 518 #define _(sym,str) ESP_ENCRYPT_POST_ERROR_##sym,
 519        foreach_esp_encrypt_post_error
 520 #undef _
 521          ESP_ENCRYPT_POST_N_ERROR,
 522      } esp_encrypt_post_error_t;
 523
 524      static char *esp_encrypt_post_error_strings[] = {
 525 #define _(sym,string) string,
 526        foreach_esp_encrypt_post_error
 527 #undef _
 528      };
 529
 530 vlib_node_registration_t dpdk_esp_encrypt_post_node;
 531
 532 static u8 *
 533 format_esp_encrypt_post_trace (u8 * s, va_list * args)
 534 {
 535   return s;
 536 }
 537
 538 static uword
 539 dpdk_esp_encrypt_post_node_fn (vlib_main_t * vm,
 540                                vlib_node_runtime_t * node,
 541                                vlib_frame_t * from_frame)
 542 {
 543   u32 n_left_from, *from, *to_next = 0, next_index;
 544
 545   from = vlib_frame_vector_args (from_frame);
 546   n_left_from = from_frame->n_vectors;
 547
 548   next_index = node->cached_next_index;
 549
 550   while (n_left_from > 0)
 551     {
 552       u32 n_left_to_next;
 553
 554       vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
 555
 556       while (n_left_from > 0 && n_left_to_next > 0)
 557         {
 558           u32 bi0, next0;
 559           vlib_buffer_t *b0 = 0;
 560
 561           bi0 = from[0];
 562           from += 1;
 563           n_left_from -= 1;
 564           n_left_to_next -= 1;
 565
 566           b0 = vlib_get_buffer (vm, bi0);
 567
 568           to_next[0] = bi0;
 569           to_next += 1;
 570
 571           next0 = vnet_buffer (b0)->unused[0];
 572
 573           vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
 574                                            to_next, n_left_to_next, bi0,
 575                                            next0);
 576         }
 577       vlib_put_next_frame (vm, node, next_index, n_left_to_next);
 578     }
 579
 580   vlib_node_increment_counter (vm, dpdk_esp_encrypt_post_node.index,
 581                                ESP_ENCRYPT_POST_ERROR_PKTS,
 582                                from_frame->n_vectors);
 583
 584   return from_frame->n_vectors;
 585 }
 586
 587 /* *INDENT-OFF* */
 588 VLIB_REGISTER_NODE (dpdk_esp_encrypt_post_node) = {
 589   .function = dpdk_esp_encrypt_post_node_fn,
 590   .name = "dpdk-esp-encrypt-post",
 591   .vector_size = sizeof (u32),
 592   .format_trace = format_esp_encrypt_post_trace,
 593   .type = VLIB_NODE_TYPE_INTERNAL,
 594   .n_errors = ARRAY_LEN (esp_encrypt_post_error_strings),
 595   .error_strings = esp_encrypt_post_error_strings,
 596   .n_next_nodes = ESP_ENCRYPT_N_NEXT,
 597   .next_nodes =
 598     {
 599 #define _(s,n) [ESP_ENCRYPT_NEXT_##s] = n,
 600       foreach_esp_encrypt_next
 601 #undef _
 602     }
 603 };
 604 /* *INDENT-ON* */
 605
 606 VLIB_NODE_FUNCTION_MULTIARCH (dpdk_esp_encrypt_post_node,
 607                               dpdk_esp_encrypt_post_node_fn)
 608 /*
 609  * fd.io coding-style-patch-verification: ON
 610  *
 611  * Local Variables:
 612  * eval: (c-set-style "gnu")
 613  * End:
 614  */