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, int is_tun)
 114 {
 115   u32 n_left_from, *from, *to_next, next_index, thread_index;
 116   ipsec_main_t *im = &ipsec_main;
 117   vnet_main_t *vnm = im->vnet_main;
 118   vnet_interface_main_t *vim = &vnm->interface_main;
 119   u32 thread_idx = vlib_get_thread_index ();
 120   dpdk_crypto_main_t *dcm = &dpdk_crypto_main;
 121   crypto_resource_t *res = 0;
 122   ipsec_sa_t *sa0 = 0;
 123   crypto_alg_t *cipher_alg = 0, *auth_alg = 0;
 124   struct rte_cryptodev_sym_session *session = 0;
 125   u32 ret, last_sa_index = ~0;
 126   u8 numa = rte_socket_id ();
 127   u8 is_aead = 0;
 128   crypto_worker_main_t *cwm =
 129     vec_elt_at_index (dcm->workers_main, thread_idx);
 130   struct rte_crypto_op **ops = cwm->ops;
 131
 132   from = vlib_frame_vector_args (from_frame);
 133   n_left_from = from_frame->n_vectors;
 134   thread_index = vm->thread_index;
 135
 136   ret = crypto_alloc_ops (numa, ops, n_left_from);
 137   if (ret)
 138     {
 139       if (is_ip6)
 140         vlib_node_increment_counter (vm, dpdk_esp6_encrypt_node.index,
 141                                      ESP_ENCRYPT_ERROR_DISCARD, 1);
 142       else
 143         vlib_node_increment_counter (vm, dpdk_esp4_encrypt_node.index,
 144                                      ESP_ENCRYPT_ERROR_DISCARD, 1);
 145       /* Discard whole frame */
 146       return n_left_from;
 147     }
 148
 149   next_index = ESP_ENCRYPT_NEXT_DROP;
 150
 151   while (n_left_from > 0)
 152     {
 153       u32 n_left_to_next;
 154
 155       vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
 156
 157       while (n_left_from > 0 && n_left_to_next > 0)
 158         {
 159           clib_error_t *error;
 160           u32 bi0, bi1;
 161           vlib_buffer_t *b0, *b1;
 162           u32 sa_index0;
 163           ip4_and_esp_header_t *ih0, *oh0 = 0;
 164           ip6_and_esp_header_t *ih6_0, *oh6_0 = 0;
 165           ip4_and_udp_and_esp_header_t *ouh0 = 0;
 166           esp_header_t *esp0;
 167           esp_footer_t *f0;
 168           u8 next_hdr_type;
 169           u32 iv_size;
 170           u16 orig_sz;
 171           u8 trunc_size;
 172           u16 rewrite_len;
 173           u16 udp_encap_adv = 0;
 174           struct rte_mbuf *mb0;
 175           struct rte_crypto_op *op;
 176           u16 res_idx;
 177
 178           bi0 = from[0];
 179           from += 1;
 180           n_left_from -= 1;
 181
 182           b0 = vlib_get_buffer (vm, bi0);
 183           ih0 = vlib_buffer_get_current (b0);
 184           mb0 = rte_mbuf_from_vlib_buffer (b0);
 185
 186           /* ih0/ih6_0 */
 187           CLIB_PREFETCH (ih0, sizeof (ih6_0[0]), LOAD);
 188           /* f0 */
 189           CLIB_PREFETCH (vlib_buffer_get_tail (b0), 20, STORE);
 190           /* mb0 */
 191           CLIB_PREFETCH (mb0, CLIB_CACHE_LINE_BYTES, STORE);
 192
 193           if (n_left_from > 1)
 194             {
 195               bi1 = from[1];
 196               b1 = vlib_get_buffer (vm, bi1);
 197
 198               CLIB_PREFETCH (b1, CLIB_CACHE_LINE_BYTES, LOAD);
 199               CLIB_PREFETCH (b1->data - CLIB_CACHE_LINE_BYTES,
 200                              CLIB_CACHE_LINE_BYTES, STORE);
 201             }
 202
 203           op = ops[0];
 204           ops += 1;
 205           ASSERT (op->status == RTE_CRYPTO_OP_STATUS_NOT_PROCESSED);
 206
 207           dpdk_op_priv_t *priv = crypto_op_get_priv (op);
 208           /* store bi in op private */
 209           priv->bi = bi0;
 210
 211           u16 op_len =
 212             sizeof (op[0]) + sizeof (op[0].sym[0]) + sizeof (priv[0]);
 213           CLIB_PREFETCH (op, op_len, STORE);
 214
 215           if (is_tun)
 216             {
 217               u32 tmp;
 218               /* we are on a ipsec tunnel's feature arc */
 219               sa_index0 = *(u32 *) vnet_feature_next_with_data (&tmp, b0,
 220                                                                 sizeof
 221                                                                 (sa_index0));
 222             }
 223           else
 224             sa_index0 = vnet_buffer (b0)->ipsec.sad_index;
 225
 226           if (sa_index0 != last_sa_index)
 227             {
 228               sa0 = pool_elt_at_index (im->sad, sa_index0);
 229
 230               cipher_alg =
 231                 vec_elt_at_index (dcm->cipher_algs, sa0->crypto_alg);
 232               auth_alg = vec_elt_at_index (dcm->auth_algs, sa0->integ_alg);
 233
 234               is_aead = (cipher_alg->type == RTE_CRYPTO_SYM_XFORM_AEAD);
 235
 236               if (is_aead)
 237                 auth_alg = cipher_alg;
 238
 239               res_idx = get_resource (cwm, sa0);
 240
 241               if (PREDICT_FALSE (res_idx == (u16) ~ 0))
 242                 {
 243                   clib_warning ("unsupported SA by thread index %u",
 244                                 thread_idx);
 245                   if (is_ip6)
 246                     vlib_node_increment_counter (vm,
 247                                                  dpdk_esp6_encrypt_node.index,
 248                                                  ESP_ENCRYPT_ERROR_NOSUP, 1);
 249                   else
 250                     vlib_node_increment_counter (vm,
 251                                                  dpdk_esp4_encrypt_node.index,
 252                                                  ESP_ENCRYPT_ERROR_NOSUP, 1);
 253                   to_next[0] = bi0;
 254                   to_next += 1;
 255                   n_left_to_next -= 1;
 256                   goto trace;
 257                 }
 258               res = vec_elt_at_index (dcm->resource, res_idx);
 259
 260               error = crypto_get_session (&session, sa_index0, res, cwm, 1);
 261               if (PREDICT_FALSE (error || !session))
 262                 {
 263                   clib_warning ("failed to get crypto session");
 264                   if (is_ip6)
 265                     vlib_node_increment_counter (vm,
 266                                                  dpdk_esp6_encrypt_node.index,
 267                                                  ESP_ENCRYPT_ERROR_SESSION,
 268                                                  1);
 269                   else
 270                     vlib_node_increment_counter (vm,
 271                                                  dpdk_esp4_encrypt_node.index,
 272                                                  ESP_ENCRYPT_ERROR_SESSION,
 273                                                  1);
 274                   to_next[0] = bi0;
 275                   to_next += 1;
 276                   n_left_to_next -= 1;
 277                   goto trace;
 278                 }
 279
 280               last_sa_index = sa_index0;
 281             }
 282
 283           if (PREDICT_FALSE (esp_seq_advance (sa0)))
 284             {
 285               clib_warning ("sequence number counter has cycled SPI %u",
 286                             sa0->spi);
 287               if (is_ip6)
 288                 vlib_node_increment_counter (vm,
 289                                              dpdk_esp6_encrypt_node.index,
 290                                              ESP_ENCRYPT_ERROR_SEQ_CYCLED, 1);
 291               else
 292                 vlib_node_increment_counter (vm,
 293                                              dpdk_esp4_encrypt_node.index,
 294                                              ESP_ENCRYPT_ERROR_SEQ_CYCLED, 1);
 295               //TODO: rekey SA
 296               to_next[0] = bi0;
 297               to_next += 1;
 298               n_left_to_next -= 1;
 299               goto trace;
 300             }
 301
 302           orig_sz = b0->current_length;
 303
 304           /* TODO multi-seg support - total_length_not_including_first_buffer */
 305           vlib_increment_combined_counter
 306             (&ipsec_sa_counters, thread_index, sa_index0,
 307              1, b0->current_length);
 308
 309           /* Update tunnel interface tx counters */
 310           if (is_tun)
 311             vlib_increment_combined_counter
 312               (vim->combined_sw_if_counters + VNET_INTERFACE_COUNTER_TX,
 313                thread_index, vnet_buffer (b0)->sw_if_index[VLIB_TX],
 314                1, b0->current_length);
 315
 316           res->ops[res->n_ops] = op;
 317           res->bi[res->n_ops] = bi0;
 318           res->n_ops += 1;
 319
 320           dpdk_gcm_cnt_blk *icb = &priv->cb;
 321
 322           crypto_set_icb (icb, sa0->salt, sa0->seq, sa0->seq_hi);
 323
 324           iv_size = cipher_alg->iv_len;
 325           trunc_size = auth_alg->trunc_size;
 326
 327           /* if UDP encapsulation is used adjust the address of the IP header */
 328           if (ipsec_sa_is_set_UDP_ENCAP (sa0) && !is_ip6)
 329             udp_encap_adv = sizeof (udp_header_t);
 330
 331           if (ipsec_sa_is_set_IS_TUNNEL (sa0))
 332             {
 333               rewrite_len = 0;
 334               if (!is_ip6 && !ipsec_sa_is_set_IS_TUNNEL_V6 (sa0))       /* ip4inip4 */
 335                 {
 336                   /* in tunnel mode send it back to FIB */
 337                   priv->next = DPDK_CRYPTO_INPUT_NEXT_IP4_LOOKUP;
 338                   u8 adv = sizeof (ip4_header_t) + udp_encap_adv +
 339                     sizeof (esp_header_t) + iv_size;
 340                   vlib_buffer_advance (b0, -adv);
 341                   oh0 = vlib_buffer_get_current (b0);
 342                   ouh0 = vlib_buffer_get_current (b0);
 343                   next_hdr_type = IP_PROTOCOL_IP_IN_IP;
 344                   /*
 345                    * oh0->ip4.ip_version_and_header_length = 0x45;
 346                    * oh0->ip4.tos = ih0->ip4.tos;
 347                    * oh0->ip4.fragment_id = 0;
 348                    * oh0->ip4.flags_and_fragment_offset = 0;
 349                    */
 350                   oh0->ip4.checksum_data_64[0] =
 351                     clib_host_to_net_u64 (0x45ULL << 56);
 352                   /*
 353                    * oh0->ip4.ttl = 254;
 354                    * oh0->ip4.protocol = IP_PROTOCOL_IPSEC_ESP;
 355                    */
 356                   oh0->ip4.checksum_data_32[2] =
 357                     clib_host_to_net_u32 (0xfe320000);
 358
 359                   oh0->ip4.src_address.as_u32 =
 360                     sa0->tunnel_src_addr.ip4.as_u32;
 361                   oh0->ip4.dst_address.as_u32 =
 362                     sa0->tunnel_dst_addr.ip4.as_u32;
 363
 364                   if (ipsec_sa_is_set_UDP_ENCAP (sa0))
 365                     {
 366                       oh0->ip4.protocol = IP_PROTOCOL_UDP;
 367                       esp0 = &ouh0->esp;
 368                     }
 369                   else
 370                     esp0 = &oh0->esp;
 371                   esp0->spi = clib_host_to_net_u32 (sa0->spi);
 372                   esp0->seq = clib_host_to_net_u32 (sa0->seq);
 373                 }
 374               else if (is_ip6 && ipsec_sa_is_set_IS_TUNNEL_V6 (sa0))
 375                 {
 376                   /* ip6inip6 */
 377                   /* in tunnel mode send it back to FIB */
 378                   priv->next = DPDK_CRYPTO_INPUT_NEXT_IP6_LOOKUP;
 379
 380                   u8 adv =
 381                     sizeof (ip6_header_t) + sizeof (esp_header_t) + iv_size;
 382                   vlib_buffer_advance (b0, -adv);
 383                   ih6_0 = (ip6_and_esp_header_t *) ih0;
 384                   oh6_0 = vlib_buffer_get_current (b0);
 385
 386                   next_hdr_type = IP_PROTOCOL_IPV6;
 387
 388                   oh6_0->ip6.ip_version_traffic_class_and_flow_label =
 389                     ih6_0->ip6.ip_version_traffic_class_and_flow_label;
 390
 391                   oh6_0->ip6.protocol = IP_PROTOCOL_IPSEC_ESP;
 392                   oh6_0->ip6.hop_limit = 254;
 393                   oh6_0->ip6.src_address.as_u64[0] =
 394                     sa0->tunnel_src_addr.ip6.as_u64[0];
 395                   oh6_0->ip6.src_address.as_u64[1] =
 396                     sa0->tunnel_src_addr.ip6.as_u64[1];
 397                   oh6_0->ip6.dst_address.as_u64[0] =
 398                     sa0->tunnel_dst_addr.ip6.as_u64[0];
 399                   oh6_0->ip6.dst_address.as_u64[1] =
 400                     sa0->tunnel_dst_addr.ip6.as_u64[1];
 401                   esp0 = &oh6_0->esp;
 402                   oh6_0->esp.spi = clib_host_to_net_u32 (sa0->spi);
 403                   oh6_0->esp.seq = clib_host_to_net_u32 (sa0->seq);
 404                 }
 405               else              /* unsupported ip4inip6, ip6inip4 */
 406                 {
 407                   if (is_ip6)
 408                     vlib_node_increment_counter (vm,
 409                                                  dpdk_esp6_encrypt_node.index,
 410                                                  ESP_ENCRYPT_ERROR_NOSUP, 1);
 411                   else
 412                     vlib_node_increment_counter (vm,
 413                                                  dpdk_esp4_encrypt_node.index,
 414                                                  ESP_ENCRYPT_ERROR_NOSUP, 1);
 415                   to_next[0] = bi0;
 416                   to_next += 1;
 417                   n_left_to_next -= 1;
 418                   goto trace;
 419                 }
 420               vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
 421             }
 422           else                  /* transport mode */
 423             {
 424               priv->next = DPDK_CRYPTO_INPUT_NEXT_INTERFACE_OUTPUT;
 425               rewrite_len = vnet_buffer (b0)->ip.save_rewrite_length;
 426               u16 adv = sizeof (esp_header_t) + iv_size + udp_encap_adv;
 427               vlib_buffer_advance (b0, -adv - rewrite_len);
 428               u8 *src = ((u8 *) ih0) - rewrite_len;
 429               u8 *dst = vlib_buffer_get_current (b0);
 430               oh0 = vlib_buffer_get_current (b0) + rewrite_len;
 431
 432               if (is_ip6)
 433                 {
 434                   orig_sz -= sizeof (ip6_header_t);
 435                   ih6_0 = (ip6_and_esp_header_t *) ih0;
 436                   next_hdr_type = ih6_0->ip6.protocol;
 437                   memmove (dst, src, rewrite_len + sizeof (ip6_header_t));
 438                   oh6_0 = (ip6_and_esp_header_t *) oh0;
 439                   oh6_0->ip6.protocol = IP_PROTOCOL_IPSEC_ESP;
 440                   esp0 = &oh6_0->esp;
 441                 }
 442               else              /* ipv4 */
 443                 {
 444                   u16 ip_size = ip4_header_bytes (&ih0->ip4);
 445                   orig_sz -= ip_size;
 446                   next_hdr_type = ih0->ip4.protocol;
 447                   memmove (dst, src, rewrite_len + ip_size);
 448                   oh0->ip4.protocol = IP_PROTOCOL_IPSEC_ESP;
 449                   esp0 = (esp_header_t *) (((u8 *) oh0) + ip_size);
 450                   if (ipsec_sa_is_set_UDP_ENCAP (sa0))
 451                     {
 452                       oh0->ip4.protocol = IP_PROTOCOL_UDP;
 453                       esp0 = (esp_header_t *)
 454                         (((u8 *) oh0) + ip_size + udp_encap_adv);
 455                     }
 456                   else
 457                     {
 458                       oh0->ip4.protocol = IP_PROTOCOL_IPSEC_ESP;
 459                       esp0 = (esp_header_t *) (((u8 *) oh0) + ip_size);
 460                     }
 461                 }
 462               esp0->spi = clib_host_to_net_u32 (sa0->spi);
 463               esp0->seq = clib_host_to_net_u32 (sa0->seq);
 464             }
 465
 466           if (ipsec_sa_is_set_UDP_ENCAP (sa0) && ouh0)
 467             {
 468               ouh0->udp.src_port = clib_host_to_net_u16 (UDP_DST_PORT_ipsec);
 469               ouh0->udp.dst_port = clib_host_to_net_u16 (UDP_DST_PORT_ipsec);
 470               ouh0->udp.checksum = 0;
 471             }
 472           ASSERT (is_pow2 (cipher_alg->boundary));
 473           u16 mask = cipher_alg->boundary - 1;
 474           u16 pad_payload_len = ((orig_sz + 2) + mask) & ~mask;
 475           u8 pad_bytes = pad_payload_len - 2 - orig_sz;
 476
 477           u8 *padding =
 478             vlib_buffer_put_uninit (b0, pad_bytes + 2 + trunc_size);
 479
 480           /* The extra pad bytes would be overwritten by the digest */
 481           if (pad_bytes)
 482             clib_memcpy_fast (padding, pad_data, 16);
 483
 484           f0 = (esp_footer_t *) (padding + pad_bytes);
 485           f0->pad_length = pad_bytes;
 486           f0->next_header = next_hdr_type;
 487
 488           if (is_ip6)
 489             {
 490               u16 len = b0->current_length - sizeof (ip6_header_t);
 491               oh6_0->ip6.payload_length =
 492                 clib_host_to_net_u16 (len - rewrite_len);
 493             }
 494           else
 495             {
 496               oh0->ip4.length =
 497                 clib_host_to_net_u16 (b0->current_length - rewrite_len);
 498               oh0->ip4.checksum = ip4_header_checksum (&oh0->ip4);
 499               if (ipsec_sa_is_set_UDP_ENCAP (sa0) && ouh0)
 500                 {
 501                   ouh0->udp.length =
 502                     clib_host_to_net_u16 (clib_net_to_host_u16
 503                                           (ouh0->ip4.length) -
 504                                           ip4_header_bytes (&ouh0->ip4));
 505                 }
 506             }
 507
 508           b0->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
 509
 510           /* mbuf packet starts at ESP header */
 511           mb0->data_len = vlib_buffer_get_tail (b0) - ((u8 *) esp0);
 512           mb0->pkt_len = vlib_buffer_get_tail (b0) - ((u8 *) esp0);
 513           mb0->data_off = ((void *) esp0) - mb0->buf_addr;
 514
 515           u32 cipher_off, cipher_len, auth_len = 0;
 516           u32 *aad = NULL;
 517
 518           u8 *digest = vlib_buffer_get_tail (b0) - trunc_size;
 519           u64 digest_paddr =
 520             mb0->buf_physaddr + digest - ((u8 *) mb0->buf_addr);
 521
 522           if (!is_aead && cipher_alg->alg == RTE_CRYPTO_CIPHER_AES_CBC)
 523             {
 524               cipher_off = sizeof (esp_header_t);
 525               cipher_len = iv_size + pad_payload_len;
 526             }
 527           else                  /* CTR/GCM */
 528             {
 529               u32 *esp_iv = (u32 *) (esp0 + 1);
 530               esp_iv[0] = sa0->seq;
 531               esp_iv[1] = sa0->seq_hi;
 532
 533               cipher_off = sizeof (esp_header_t) + iv_size;
 534               cipher_len = pad_payload_len;
 535             }
 536
 537           if (is_aead)
 538             {
 539               aad = (u32 *) priv->aad;
 540               aad[0] = clib_host_to_net_u32 (sa0->spi);
 541               aad[1] = clib_host_to_net_u32 (sa0->seq);
 542
 543               /* aad[3] should always be 0 */
 544               if (PREDICT_FALSE (ipsec_sa_is_set_USE_ESN (sa0)))
 545                 aad[2] = clib_host_to_net_u32 (sa0->seq_hi);
 546               else
 547                 aad[2] = 0;
 548             }
 549           else
 550             {
 551               auth_len =
 552                 vlib_buffer_get_tail (b0) - ((u8 *) esp0) - trunc_size;
 553               if (ipsec_sa_is_set_USE_ESN (sa0))
 554                 {
 555                   u32 *_digest = (u32 *) digest;
 556                   _digest[0] = clib_host_to_net_u32 (sa0->seq_hi);
 557                   auth_len += 4;
 558                 }
 559             }
 560
 561           crypto_op_setup (is_aead, mb0, op, session, cipher_off, cipher_len,
 562                            0, auth_len, (u8 *) aad, digest, digest_paddr);
 563
 564         trace:
 565           if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
 566             {
 567               esp_encrypt_trace_t *tr =
 568                 vlib_add_trace (vm, node, b0, sizeof (*tr));
 569               tr->crypto_alg = sa0->crypto_alg;
 570               tr->integ_alg = sa0->integ_alg;
 571               u8 *p = vlib_buffer_get_current (b0);
 572               if (!ipsec_sa_is_set_IS_TUNNEL (sa0))
 573                 p += vnet_buffer (b0)->ip.save_rewrite_length;
 574               clib_memcpy_fast (tr->packet_data, p, sizeof (tr->packet_data));
 575             }
 576         }
 577       vlib_put_next_frame (vm, node, next_index, n_left_to_next);
 578     }
 579   if (is_ip6)
 580     {
 581       vlib_node_increment_counter (vm, dpdk_esp6_encrypt_node.index,
 582                                    ESP_ENCRYPT_ERROR_RX_PKTS,
 583                                    from_frame->n_vectors);
 584
 585       crypto_enqueue_ops (vm, cwm, dpdk_esp6_encrypt_node.index,
 586                           ESP_ENCRYPT_ERROR_ENQ_FAIL, numa);
 587     }
 588   else
 589     {
 590       vlib_node_increment_counter (vm, dpdk_esp4_encrypt_node.index,
 591                                    ESP_ENCRYPT_ERROR_RX_PKTS,
 592                                    from_frame->n_vectors);
 593
 594       crypto_enqueue_ops (vm, cwm, dpdk_esp4_encrypt_node.index,
 595                           ESP_ENCRYPT_ERROR_ENQ_FAIL, numa);
 596     }
 597
 598   crypto_free_ops (numa, ops, cwm->ops + from_frame->n_vectors - ops);
 599
 600   return from_frame->n_vectors;
 601 }
 602
 603 VLIB_NODE_FN (dpdk_esp4_encrypt_node) (vlib_main_t * vm,
 604                                        vlib_node_runtime_t * node,
 605                                        vlib_frame_t * from_frame)
 606 {
 607   return dpdk_esp_encrypt_inline (vm, node, from_frame, 0 /*is_ip6 */ , 0);
 608 }
 609
 610 /* *INDENT-OFF* */
 611 VLIB_REGISTER_NODE (dpdk_esp4_encrypt_node) = {
 612   .name = "dpdk-esp4-encrypt",
 613   .flags = VLIB_NODE_FLAG_IS_OUTPUT,
 614   .vector_size = sizeof (u32),
 615   .format_trace = format_esp_encrypt_trace,
 616   .n_errors = ARRAY_LEN (esp_encrypt_error_strings),
 617   .error_strings = esp_encrypt_error_strings,
 618   .n_next_nodes = 1,
 619   .next_nodes =
 620     {
 621       [ESP_ENCRYPT_NEXT_DROP] = "error-drop",
 622     }
 623 };
 624 /* *INDENT-ON* */
 625
 626 VLIB_NODE_FN (dpdk_esp6_encrypt_node) (vlib_main_t * vm,
 627                                        vlib_node_runtime_t * node,
 628                                        vlib_frame_t * from_frame)
 629 {
 630   return dpdk_esp_encrypt_inline (vm, node, from_frame, 1 /*is_ip6 */ , 0);
 631 }
 632
 633 /* *INDENT-OFF* */
 634 VLIB_REGISTER_NODE (dpdk_esp6_encrypt_node) = {
 635   .name = "dpdk-esp6-encrypt",
 636   .flags = VLIB_NODE_FLAG_IS_OUTPUT,
 637   .vector_size = sizeof (u32),
 638   .format_trace = format_esp_encrypt_trace,
 639   .n_errors = ARRAY_LEN (esp_encrypt_error_strings),
 640   .error_strings = esp_encrypt_error_strings,
 641   .n_next_nodes = 1,
 642   .next_nodes =
 643     {
 644       [ESP_ENCRYPT_NEXT_DROP] = "error-drop",
 645     }
 646 };
 647 /* *INDENT-ON* */
 648
 649 VLIB_NODE_FN (dpdk_esp4_encrypt_tun_node) (vlib_main_t * vm,
 650                                            vlib_node_runtime_t * node,
 651                                            vlib_frame_t * from_frame)
 652 {
 653   return dpdk_esp_encrypt_inline (vm, node, from_frame, 0 /*is_ip6 */ , 1);
 654 }
 655
 656 /* *INDENT-OFF* */
 657 VLIB_REGISTER_NODE (dpdk_esp4_encrypt_tun_node) = {
 658   .name = "dpdk-esp4-encrypt-tun",
 659   .flags = VLIB_NODE_FLAG_IS_OUTPUT,
 660   .vector_size = sizeof (u32),
 661   .format_trace = format_esp_encrypt_trace,
 662   .n_errors = ARRAY_LEN (esp_encrypt_error_strings),
 663   .error_strings = esp_encrypt_error_strings,
 664   .n_next_nodes = 1,
 665   .next_nodes =
 666     {
 667       [ESP_ENCRYPT_NEXT_DROP] = "error-drop",
 668     }
 669 };
 670
 671 VNET_FEATURE_INIT (dpdk_esp4_encrypt_tun_feat_node, static) =
 672 {
 673   .arc_name = "ip4-output",
 674   .node_name = "dpdk-esp4-encrypt-tun",
 675   .runs_before = VNET_FEATURES ("adj-midchain-tx"),
 676 };
 677 /* *INDENT-ON* */
 678
 679 VLIB_NODE_FN (dpdk_esp6_encrypt_tun_node) (vlib_main_t * vm,
 680                                            vlib_node_runtime_t * node,
 681                                            vlib_frame_t * from_frame)
 682 {
 683   return dpdk_esp_encrypt_inline (vm, node, from_frame, 1 /*is_ip6 */ , 1);
 684 }
 685
 686 /* *INDENT-OFF* */
 687 VLIB_REGISTER_NODE (dpdk_esp6_encrypt_tun_node) = {
 688   .name = "dpdk-esp6-encrypt-tun",
 689   .flags = VLIB_NODE_FLAG_IS_OUTPUT,
 690   .vector_size = sizeof (u32),
 691   .format_trace = format_esp_encrypt_trace,
 692   .n_errors = ARRAY_LEN (esp_encrypt_error_strings),
 693   .error_strings = esp_encrypt_error_strings,
 694   .n_next_nodes = 1,
 695   .next_nodes =
 696     {
 697       [ESP_ENCRYPT_NEXT_DROP] = "error-drop",
 698     }
 699 };
 700
 701 VNET_FEATURE_INIT (dpdk_esp6_encrypt_tun_feat_node, static) =
 702 {
 703   .arc_name = "ip6-output",
 704   .node_name = "dpdk-esp6-encrypt-tun",
 705   .runs_before = VNET_FEATURES ("adj-midchain-tx"),
 706 };
 707 /* *INDENT-ON* */
 708
 709 /*
 710  * fd.io coding-style-patch-verification: ON
 711  *
 712  * Local Variables:
 713  * eval: (c-set-style "gnu")
 714  * End:
 715  */