src/plugins/dpdk/ipsec/esp_encrypt.c

   1 /*
   2  * esp_encrypt.c : IPSec ESP encrypt node using DPDK Cryptodev
   3  *
   4  * Copyright (c) 2017 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/ipsec/esp.h>
  24 #include <vnet/udp/udp.h>
  25 #include <dpdk/buffer.h>
  26 #include <dpdk/ipsec/ipsec.h>
  27 #include <dpdk/device/dpdk.h>
  28 #include <dpdk/device/dpdk_priv.h>
  29
  30 #define foreach_esp_encrypt_next                   \
  31 _(DROP, "error-drop")                              \
  32 _(IP4_LOOKUP, "ip4-lookup")                        \
  33 _(IP6_LOOKUP, "ip6-lookup")                        \
  34 _(INTERFACE_OUTPUT, "interface-output")
  35
  36 #define _(v, s) ESP_ENCRYPT_NEXT_##v,
  37 typedef enum
  38 {
  39   foreach_esp_encrypt_next
  40 #undef _
  41     ESP_ENCRYPT_N_NEXT,
  42 } esp_encrypt_next_t;
  43
  44 #define foreach_esp_encrypt_error                   \
  45  _(RX_PKTS, "ESP pkts received")                    \
  46  _(SEQ_CYCLED, "Sequence number cycled")            \
  47  _(ENQ_FAIL, "Enqueue failed to crypto device")     \
  48  _(DISCARD, "Not enough crypto operations, discarding frame")  \
  49  _(SESSION, "Failed to get crypto session")         \
  50  _(NOSUP, "Cipher/Auth not supported")
  51
  52
  53 typedef enum
  54 {
  55 #define _(sym,str) ESP_ENCRYPT_ERROR_##sym,
  56   foreach_esp_encrypt_error
  57 #undef _
  58     ESP_ENCRYPT_N_ERROR,
  59 } esp_encrypt_error_t;
  60
  61 static char *esp_encrypt_error_strings[] = {
  62 #define _(sym,string) string,
  63   foreach_esp_encrypt_error
  64 #undef _
  65 };
  66
  67 extern vlib_node_registration_t dpdk_esp4_encrypt_node;
  68 extern vlib_node_registration_t dpdk_esp6_encrypt_node;
  69
  70 typedef struct
  71 {
  72   ipsec_crypto_alg_t crypto_alg;
  73   ipsec_integ_alg_t integ_alg;
  74   u8 packet_data[64];
  75 } esp_encrypt_trace_t;
  76
  77 /* packet trace format function */
  78 static u8 *
  79 format_esp_encrypt_trace (u8 * s, va_list * args)
  80 {
  81   CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
  82   CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
  83   esp_encrypt_trace_t *t = va_arg (*args, esp_encrypt_trace_t *);
  84   ip4_header_t *ih4 = (ip4_header_t *) t->packet_data;
  85   u32 indent = format_get_indent (s), offset;
  86
  87   s = format (s, "cipher %U auth %U\n",
  88               format_ipsec_crypto_alg, t->crypto_alg,
  89               format_ipsec_integ_alg, t->integ_alg);
  90
  91   if ((ih4->ip_version_and_header_length & 0xF0) == 0x60)
  92     {
  93       s = format (s, "%U%U", format_white_space, indent,
  94                   format_ip6_header, ih4);
  95       offset = sizeof (ip6_header_t);
  96     }
  97   else
  98     {
  99       s = format (s, "%U%U", format_white_space, indent,
 100                   format_ip4_header, ih4);
 101       offset = ip4_header_bytes (ih4);
 102     }
 103
 104   s = format (s, "\n%U%U", format_white_space, indent,
 105               format_esp_header, t->packet_data + offset);
 106
 107   return s;
 108 }
 109
 110 always_inline uword
 111 dpdk_esp_encrypt_inline (vlib_main_t * vm,
 112                          vlib_node_runtime_t * node,
 113                          vlib_frame_t * from_frame, int is_ip6)
 114 {
 115   u32 n_left_from, *from, *to_next, next_index, thread_index;
 116   ipsec_main_t *im = &ipsec_main;
 117   u32 thread_idx = vlib_get_thread_index ();
 118   dpdk_crypto_main_t *dcm = &dpdk_crypto_main;
 119   crypto_resource_t *res = 0;
 120   ipsec_sa_t *sa0 = 0;
 121   crypto_alg_t *cipher_alg = 0, *auth_alg = 0;
 122   struct rte_cryptodev_sym_session *session = 0;
 123   u32 ret, last_sa_index = ~0;
 124   u8 numa = rte_socket_id ();
 125   u8 is_aead = 0;
 126   crypto_worker_main_t *cwm =
 127     vec_elt_at_index (dcm->workers_main, thread_idx);
 128   struct rte_crypto_op **ops = cwm->ops;
 129
 130   from = vlib_frame_vector_args (from_frame);
 131   n_left_from = from_frame->n_vectors;
 132   thread_index = vm->thread_index;
 133
 134   ret = crypto_alloc_ops (numa, ops, n_left_from);
 135   if (ret)
 136     {
 137       if (is_ip6)
 138         vlib_node_increment_counter (vm, dpdk_esp6_encrypt_node.index,
 139                                      ESP_ENCRYPT_ERROR_DISCARD, 1);
 140       else
 141         vlib_node_increment_counter (vm, dpdk_esp4_encrypt_node.index,
 142                                      ESP_ENCRYPT_ERROR_DISCARD, 1);
 143       /* Discard whole frame */
 144       return n_left_from;
 145     }
 146
 147   next_index = ESP_ENCRYPT_NEXT_DROP;
 148
 149   while (n_left_from > 0)
 150     {
 151       u32 n_left_to_next;
 152
 153       vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
 154
 155       while (n_left_from > 0 && n_left_to_next > 0)
 156         {
 157           clib_error_t *error;
 158           u32 bi0, bi1;
 159           vlib_buffer_t *b0, *b1;
 160           u32 sa_index0;
 161           ip4_and_esp_header_t *ih0, *oh0 = 0;
 162           ip6_and_esp_header_t *ih6_0, *oh6_0 = 0;
 163           ip4_and_udp_and_esp_header_t *ouh0 = 0;
 164           esp_header_t *esp0;
 165           esp_footer_t *f0;
 166           u8 next_hdr_type;
 167           u32 iv_size;
 168           u16 orig_sz;
 169           u8 trunc_size;
 170           u16 rewrite_len;
 171           u16 udp_encap_adv = 0;
 172           struct rte_mbuf *mb0;
 173           struct rte_crypto_op *op;
 174           u16 res_idx;
 175
 176           bi0 = from[0];
 177           from += 1;
 178           n_left_from -= 1;
 179
 180           b0 = vlib_get_buffer (vm, bi0);
 181           ih0 = vlib_buffer_get_current (b0);
 182           mb0 = rte_mbuf_from_vlib_buffer (b0);
 183
 184           /* ih0/ih6_0 */
 185           CLIB_PREFETCH (ih0, sizeof (ih6_0[0]), LOAD);
 186           /* f0 */
 187           CLIB_PREFETCH (vlib_buffer_get_tail (b0), 20, STORE);
 188           /* mb0 */
 189           CLIB_PREFETCH (mb0, CLIB_CACHE_LINE_BYTES, STORE);
 190
 191           if (n_left_from > 1)
 192             {
 193               bi1 = from[1];
 194               b1 = vlib_get_buffer (vm, bi1);
 195
 196               CLIB_PREFETCH (b1, CLIB_CACHE_LINE_BYTES, LOAD);
 197               CLIB_PREFETCH (b1->data - CLIB_CACHE_LINE_BYTES,
 198                              CLIB_CACHE_LINE_BYTES, STORE);
 199             }
 200
 201           op = ops[0];
 202           ops += 1;
 203           ASSERT (op->status == RTE_CRYPTO_OP_STATUS_NOT_PROCESSED);
 204
 205           dpdk_op_priv_t *priv = crypto_op_get_priv (op);
 206           /* store bi in op private */
 207           priv->bi = bi0;
 208
 209           u16 op_len =
 210             sizeof (op[0]) + sizeof (op[0].sym[0]) + sizeof (priv[0]);
 211           CLIB_PREFETCH (op, op_len, STORE);
 212
 213           sa_index0 = vnet_buffer (b0)->ipsec.sad_index;
 214
 215           if (sa_index0 != last_sa_index)
 216             {
 217               sa0 = pool_elt_at_index (im->sad, sa_index0);
 218
 219               cipher_alg =
 220                 vec_elt_at_index (dcm->cipher_algs, sa0->crypto_alg);
 221               auth_alg = vec_elt_at_index (dcm->auth_algs, sa0->integ_alg);
 222
 223               is_aead = (cipher_alg->type == RTE_CRYPTO_SYM_XFORM_AEAD);
 224
 225               if (is_aead)
 226                 auth_alg = cipher_alg;
 227
 228               res_idx = get_resource (cwm, sa0);
 229
 230               if (PREDICT_FALSE (res_idx == (u16) ~ 0))
 231                 {
 232                   clib_warning ("unsupported SA by thread index %u",
 233                                 thread_idx);
 234                   if (is_ip6)
 235                     vlib_node_increment_counter (vm,
 236                                                  dpdk_esp6_encrypt_node.index,
 237                                                  ESP_ENCRYPT_ERROR_NOSUP, 1);
 238                   else
 239                     vlib_node_increment_counter (vm,
 240                                                  dpdk_esp4_encrypt_node.index,
 241                                                  ESP_ENCRYPT_ERROR_NOSUP, 1);
 242                   to_next[0] = bi0;
 243                   to_next += 1;
 244                   n_left_to_next -= 1;
 245                   goto trace;
 246                 }
 247               res = vec_elt_at_index (dcm->resource, res_idx);
 248
 249               error = crypto_get_session (&session, sa_index0, res, cwm, 1);
 250               if (PREDICT_FALSE (error || !session))
 251                 {
 252                   clib_warning ("failed to get crypto session");
 253                   if (is_ip6)
 254                     vlib_node_increment_counter (vm,
 255                                                  dpdk_esp6_encrypt_node.index,
 256                                                  ESP_ENCRYPT_ERROR_SESSION,
 257                                                  1);
 258                   else
 259                     vlib_node_increment_counter (vm,
 260                                                  dpdk_esp4_encrypt_node.index,
 261                                                  ESP_ENCRYPT_ERROR_SESSION,
 262                                                  1);
 263                   to_next[0] = bi0;
 264                   to_next += 1;
 265                   n_left_to_next -= 1;
 266                   goto trace;
 267                 }
 268
 269               last_sa_index = sa_index0;
 270             }
 271
 272           if (PREDICT_FALSE (esp_seq_advance (sa0)))
 273             {
 274               clib_warning ("sequence number counter has cycled SPI %u",
 275                             sa0->spi);
 276               if (is_ip6)
 277                 vlib_node_increment_counter (vm,
 278                                              dpdk_esp6_encrypt_node.index,
 279                                              ESP_ENCRYPT_ERROR_SEQ_CYCLED, 1);
 280               else
 281                 vlib_node_increment_counter (vm,
 282                                              dpdk_esp4_encrypt_node.index,
 283                                              ESP_ENCRYPT_ERROR_SEQ_CYCLED, 1);
 284               //TODO: rekey SA
 285               to_next[0] = bi0;
 286               to_next += 1;
 287               n_left_to_next -= 1;
 288               goto trace;
 289             }
 290
 291           orig_sz = b0->current_length;
 292
 293           /* TODO multi-seg support - total_length_not_including_first_buffer */
 294           vlib_increment_combined_counter
 295             (&ipsec_sa_counters, thread_index, sa_index0,
 296              1, b0->current_length);
 297
 298           res->ops[res->n_ops] = op;
 299           res->bi[res->n_ops] = bi0;
 300           res->n_ops += 1;
 301
 302           dpdk_gcm_cnt_blk *icb = &priv->cb;
 303
 304           crypto_set_icb (icb, sa0->salt, sa0->seq, sa0->seq_hi);
 305
 306           iv_size = cipher_alg->iv_len;
 307           trunc_size = auth_alg->trunc_size;
 308
 309           /* if UDP encapsulation is used adjust the address of the IP header */
 310           if (ipsec_sa_is_set_UDP_ENCAP (sa0) && !is_ip6)
 311             udp_encap_adv = sizeof (udp_header_t);
 312
 313           if (ipsec_sa_is_set_IS_TUNNEL (sa0))
 314             {
 315               rewrite_len = 0;
 316               if (!is_ip6 && !ipsec_sa_is_set_IS_TUNNEL_V6 (sa0))       /* ip4inip4 */
 317                 {
 318                   /* in tunnel mode send it back to FIB */
 319                   priv->next = DPDK_CRYPTO_INPUT_NEXT_IP4_LOOKUP;
 320                   u8 adv = sizeof (ip4_header_t) + udp_encap_adv +
 321                     sizeof (esp_header_t) + iv_size;
 322                   vlib_buffer_advance (b0, -adv);
 323                   oh0 = vlib_buffer_get_current (b0);
 324                   ouh0 = vlib_buffer_get_current (b0);
 325                   next_hdr_type = IP_PROTOCOL_IP_IN_IP;
 326                   /*
 327                    * oh0->ip4.ip_version_and_header_length = 0x45;
 328                    * oh0->ip4.tos = ih0->ip4.tos;
 329                    * oh0->ip4.fragment_id = 0;
 330                    * oh0->ip4.flags_and_fragment_offset = 0;
 331                    */
 332                   oh0->ip4.checksum_data_64[0] =
 333                     clib_host_to_net_u64 (0x45ULL << 56);
 334                   /*
 335                    * oh0->ip4.ttl = 254;
 336                    * oh0->ip4.protocol = IP_PROTOCOL_IPSEC_ESP;
 337                    */
 338                   oh0->ip4.checksum_data_32[2] =
 339                     clib_host_to_net_u32 (0xfe320000);
 340
 341                   oh0->ip4.src_address.as_u32 =
 342                     sa0->tunnel_src_addr.ip4.as_u32;
 343                   oh0->ip4.dst_address.as_u32 =
 344                     sa0->tunnel_dst_addr.ip4.as_u32;
 345
 346                   if (ipsec_sa_is_set_UDP_ENCAP (sa0))
 347                     {
 348                       oh0->ip4.protocol = IP_PROTOCOL_UDP;
 349                       esp0 = &ouh0->esp;
 350                     }
 351                   else
 352                     esp0 = &oh0->esp;
 353                   esp0->spi = clib_host_to_net_u32 (sa0->spi);
 354                   esp0->seq = clib_host_to_net_u32 (sa0->seq);
 355                 }
 356               else if (is_ip6 && ipsec_sa_is_set_IS_TUNNEL_V6 (sa0))
 357                 {
 358                   /* ip6inip6 */
 359                   /* in tunnel mode send it back to FIB */
 360                   priv->next = DPDK_CRYPTO_INPUT_NEXT_IP6_LOOKUP;
 361
 362                   u8 adv =
 363                     sizeof (ip6_header_t) + sizeof (esp_header_t) + iv_size;
 364                   vlib_buffer_advance (b0, -adv);
 365                   ih6_0 = (ip6_and_esp_header_t *) ih0;
 366                   oh6_0 = vlib_buffer_get_current (b0);
 367
 368                   next_hdr_type = IP_PROTOCOL_IPV6;
 369
 370                   oh6_0->ip6.ip_version_traffic_class_and_flow_label =
 371                     ih6_0->ip6.ip_version_traffic_class_and_flow_label;
 372
 373                   oh6_0->ip6.protocol = IP_PROTOCOL_IPSEC_ESP;
 374                   oh6_0->ip6.hop_limit = 254;
 375                   oh6_0->ip6.src_address.as_u64[0] =
 376                     sa0->tunnel_src_addr.ip6.as_u64[0];
 377                   oh6_0->ip6.src_address.as_u64[1] =
 378                     sa0->tunnel_src_addr.ip6.as_u64[1];
 379                   oh6_0->ip6.dst_address.as_u64[0] =
 380                     sa0->tunnel_dst_addr.ip6.as_u64[0];
 381                   oh6_0->ip6.dst_address.as_u64[1] =
 382                     sa0->tunnel_dst_addr.ip6.as_u64[1];
 383                   esp0 = &oh6_0->esp;
 384                   oh6_0->esp.spi = clib_host_to_net_u32 (sa0->spi);
 385                   oh6_0->esp.seq = clib_host_to_net_u32 (sa0->seq);
 386                 }
 387               else              /* unsupported ip4inip6, ip6inip4 */
 388                 {
 389                   if (is_ip6)
 390                     vlib_node_increment_counter (vm,
 391                                                  dpdk_esp6_encrypt_node.index,
 392                                                  ESP_ENCRYPT_ERROR_NOSUP, 1);
 393                   else
 394                     vlib_node_increment_counter (vm,
 395                                                  dpdk_esp4_encrypt_node.index,
 396                                                  ESP_ENCRYPT_ERROR_NOSUP, 1);
 397                   to_next[0] = bi0;
 398                   to_next += 1;
 399                   n_left_to_next -= 1;
 400                   goto trace;
 401                 }
 402               vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
 403             }
 404           else                  /* transport mode */
 405             {
 406               priv->next = DPDK_CRYPTO_INPUT_NEXT_INTERFACE_OUTPUT;
 407               rewrite_len = vnet_buffer (b0)->ip.save_rewrite_length;
 408               u16 adv = sizeof (esp_header_t) + iv_size + udp_encap_adv;
 409               vlib_buffer_advance (b0, -adv - rewrite_len);
 410               u8 *src = ((u8 *) ih0) - rewrite_len;
 411               u8 *dst = vlib_buffer_get_current (b0);
 412               oh0 = vlib_buffer_get_current (b0) + rewrite_len;
 413
 414               if (is_ip6)
 415                 {
 416                   orig_sz -= sizeof (ip6_header_t);
 417                   ih6_0 = (ip6_and_esp_header_t *) ih0;
 418                   next_hdr_type = ih6_0->ip6.protocol;
 419                   memmove (dst, src, rewrite_len + sizeof (ip6_header_t));
 420                   oh6_0 = (ip6_and_esp_header_t *) oh0;
 421                   oh6_0->ip6.protocol = IP_PROTOCOL_IPSEC_ESP;
 422                   esp0 = &oh6_0->esp;
 423                 }
 424               else              /* ipv4 */
 425                 {
 426                   u16 ip_size = ip4_header_bytes (&ih0->ip4);
 427                   orig_sz -= ip_size;
 428                   next_hdr_type = ih0->ip4.protocol;
 429                   memmove (dst, src, rewrite_len + ip_size);
 430                   oh0->ip4.protocol = IP_PROTOCOL_IPSEC_ESP;
 431                   esp0 = (esp_header_t *) (((u8 *) oh0) + ip_size);
 432                   if (ipsec_sa_is_set_UDP_ENCAP (sa0))
 433                     {
 434                       oh0->ip4.protocol = IP_PROTOCOL_UDP;
 435                       esp0 = (esp_header_t *)
 436                         (((u8 *) oh0) + ip_size + udp_encap_adv);
 437                     }
 438                   else
 439                     {
 440                       oh0->ip4.protocol = IP_PROTOCOL_IPSEC_ESP;
 441                       esp0 = (esp_header_t *) (((u8 *) oh0) + ip_size);
 442                     }
 443                 }
 444               esp0->spi = clib_host_to_net_u32 (sa0->spi);
 445               esp0->seq = clib_host_to_net_u32 (sa0->seq);
 446             }
 447
 448           if (ipsec_sa_is_set_UDP_ENCAP (sa0) && ouh0)
 449             {
 450               ouh0->udp.src_port = clib_host_to_net_u16 (UDP_DST_PORT_ipsec);
 451               ouh0->udp.dst_port = clib_host_to_net_u16 (UDP_DST_PORT_ipsec);
 452               ouh0->udp.checksum = 0;
 453             }
 454           ASSERT (is_pow2 (cipher_alg->boundary));
 455           u16 mask = cipher_alg->boundary - 1;
 456           u16 pad_payload_len = ((orig_sz + 2) + mask) & ~mask;
 457           u8 pad_bytes = pad_payload_len - 2 - orig_sz;
 458
 459           u8 *padding =
 460             vlib_buffer_put_uninit (b0, pad_bytes + 2 + trunc_size);
 461
 462           /* The extra pad bytes would be overwritten by the digest */
 463           if (pad_bytes)
 464             clib_memcpy_fast (padding, pad_data, 16);
 465
 466           f0 = (esp_footer_t *) (padding + pad_bytes);
 467           f0->pad_length = pad_bytes;
 468           f0->next_header = next_hdr_type;
 469
 470           if (is_ip6)
 471             {
 472               u16 len = b0->current_length - sizeof (ip6_header_t);
 473               oh6_0->ip6.payload_length =
 474                 clib_host_to_net_u16 (len - rewrite_len);
 475             }
 476           else
 477             {
 478               oh0->ip4.length =
 479                 clib_host_to_net_u16 (b0->current_length - rewrite_len);
 480               oh0->ip4.checksum = ip4_header_checksum (&oh0->ip4);
 481               if (ipsec_sa_is_set_UDP_ENCAP (sa0) && ouh0)
 482                 {
 483                   ouh0->udp.length =
 484                     clib_host_to_net_u16 (clib_net_to_host_u16
 485                                           (ouh0->ip4.length) -
 486                                           ip4_header_bytes (&ouh0->ip4));
 487                 }
 488             }
 489
 490           b0->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
 491
 492           /* mbuf packet starts at ESP header */
 493           mb0->data_len = vlib_buffer_get_tail (b0) - ((u8 *) esp0);
 494           mb0->pkt_len = vlib_buffer_get_tail (b0) - ((u8 *) esp0);
 495           mb0->data_off = ((void *) esp0) - mb0->buf_addr;
 496
 497           u32 cipher_off, cipher_len, auth_len = 0;
 498           u32 *aad = NULL;
 499
 500           u8 *digest = vlib_buffer_get_tail (b0) - trunc_size;
 501           u64 digest_paddr =
 502             mb0->buf_physaddr + digest - ((u8 *) mb0->buf_addr);
 503
 504           if (!is_aead && cipher_alg->alg == RTE_CRYPTO_CIPHER_AES_CBC)
 505             {
 506               cipher_off = sizeof (esp_header_t);
 507               cipher_len = iv_size + pad_payload_len;
 508             }
 509           else                  /* CTR/GCM */
 510             {
 511               u32 *esp_iv = (u32 *) (esp0 + 1);
 512               esp_iv[0] = sa0->seq;
 513               esp_iv[1] = sa0->seq_hi;
 514
 515               cipher_off = sizeof (esp_header_t) + iv_size;
 516               cipher_len = pad_payload_len;
 517             }
 518
 519           if (is_aead)
 520             {
 521               aad = (u32 *) priv->aad;
 522               aad[0] = clib_host_to_net_u32 (sa0->spi);
 523               aad[1] = clib_host_to_net_u32 (sa0->seq);
 524
 525               /* aad[3] should always be 0 */
 526               if (PREDICT_FALSE (ipsec_sa_is_set_USE_ESN (sa0)))
 527                 aad[2] = clib_host_to_net_u32 (sa0->seq_hi);
 528               else
 529                 aad[2] = 0;
 530             }
 531           else
 532             {
 533               auth_len =
 534                 vlib_buffer_get_tail (b0) - ((u8 *) esp0) - trunc_size;
 535               if (ipsec_sa_is_set_USE_ESN (sa0))
 536                 {
 537                   u32 *_digest = (u32 *) digest;
 538                   _digest[0] = clib_host_to_net_u32 (sa0->seq_hi);
 539                   auth_len += 4;
 540                 }
 541             }
 542
 543           crypto_op_setup (is_aead, mb0, op, session, cipher_off, cipher_len,
 544                            0, auth_len, (u8 *) aad, digest, digest_paddr);
 545
 546         trace:
 547           if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
 548             {
 549               esp_encrypt_trace_t *tr =
 550                 vlib_add_trace (vm, node, b0, sizeof (*tr));
 551               tr->crypto_alg = sa0->crypto_alg;
 552               tr->integ_alg = sa0->integ_alg;
 553               u8 *p = vlib_buffer_get_current (b0);
 554               if (!ipsec_sa_is_set_IS_TUNNEL (sa0))
 555                 p += vnet_buffer (b0)->ip.save_rewrite_length;
 556               clib_memcpy_fast (tr->packet_data, p, sizeof (tr->packet_data));
 557             }
 558         }
 559       vlib_put_next_frame (vm, node, next_index, n_left_to_next);
 560     }
 561   if (is_ip6)
 562     {
 563       vlib_node_increment_counter (vm, dpdk_esp6_encrypt_node.index,
 564                                    ESP_ENCRYPT_ERROR_RX_PKTS,
 565                                    from_frame->n_vectors);
 566
 567       crypto_enqueue_ops (vm, cwm, dpdk_esp6_encrypt_node.index,
 568                           ESP_ENCRYPT_ERROR_ENQ_FAIL, numa);
 569     }
 570   else
 571     {
 572       vlib_node_increment_counter (vm, dpdk_esp4_encrypt_node.index,
 573                                    ESP_ENCRYPT_ERROR_RX_PKTS,
 574                                    from_frame->n_vectors);
 575
 576       crypto_enqueue_ops (vm, cwm, dpdk_esp4_encrypt_node.index,
 577                           ESP_ENCRYPT_ERROR_ENQ_FAIL, numa);
 578     }
 579
 580   crypto_free_ops (numa, ops, cwm->ops + from_frame->n_vectors - ops);
 581
 582   return from_frame->n_vectors;
 583 }
 584
 585 VLIB_NODE_FN (dpdk_esp4_encrypt_node) (vlib_main_t * vm,
 586                                        vlib_node_runtime_t * node,
 587                                        vlib_frame_t * from_frame)
 588 {
 589   return dpdk_esp_encrypt_inline (vm, node, from_frame, 0 /*is_ip6 */ );
 590 }
 591
 592 /* *INDENT-OFF* */
 593 VLIB_REGISTER_NODE (dpdk_esp4_encrypt_node) = {
 594   .name = "dpdk-esp4-encrypt",
 595   .flags = VLIB_NODE_FLAG_IS_OUTPUT,
 596   .vector_size = sizeof (u32),
 597   .format_trace = format_esp_encrypt_trace,
 598   .n_errors = ARRAY_LEN (esp_encrypt_error_strings),
 599   .error_strings = esp_encrypt_error_strings,
 600   .n_next_nodes = 1,
 601   .next_nodes =
 602     {
 603       [ESP_ENCRYPT_NEXT_DROP] = "error-drop",
 604     }
 605 };
 606 /* *INDENT-ON* */
 607
 608 VLIB_NODE_FN (dpdk_esp6_encrypt_node) (vlib_main_t * vm,
 609                                        vlib_node_runtime_t * node,
 610                                        vlib_frame_t * from_frame)
 611 {
 612   return dpdk_esp_encrypt_inline (vm, node, from_frame, 1 /*is_ip6 */ );
 613 }
 614
 615 /* *INDENT-OFF* */
 616 VLIB_REGISTER_NODE (dpdk_esp6_encrypt_node) = {
 617   .name = "dpdk-esp6-encrypt",
 618   .flags = VLIB_NODE_FLAG_IS_OUTPUT,
 619   .vector_size = sizeof (u32),
 620   .format_trace = format_esp_encrypt_trace,
 621   .n_errors = ARRAY_LEN (esp_encrypt_error_strings),
 622   .error_strings = esp_encrypt_error_strings,
 623   .n_next_nodes = 1,
 624   .next_nodes =
 625     {
 626       [ESP_ENCRYPT_NEXT_DROP] = "error-drop",
 627     }
 628 };
 629 /* *INDENT-ON* */
 630
 631 /*
 632  * fd.io coding-style-patch-verification: ON
 633  *
 634  * Local Variables:
 635  * eval: (c-set-style "gnu")
 636  * End:
 637  */