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 <vnet/ipsec/ipsec_tun.h>
  28 #include <dpdk/device/dpdk.h>
  29 #include <dpdk/device/dpdk_priv.h>
  30
  31 #define foreach_esp_encrypt_next                   \
  32 _(DROP, "error-drop")                              \
  33 _(IP4_LOOKUP, "ip4-lookup")                        \
  34 _(IP6_LOOKUP, "ip6-lookup")                        \
  35 _(INTERFACE_OUTPUT, "interface-output")
  36
  37 #define _(v, s) ESP_ENCRYPT_NEXT_##v,
  38 typedef enum
  39 {
  40   foreach_esp_encrypt_next
  41 #undef _
  42     ESP_ENCRYPT_N_NEXT,
  43 } esp_encrypt_next_t;
  44
  45 #define foreach_esp_encrypt_error                   \
  46  _(RX_PKTS, "ESP pkts received")                    \
  47  _(SEQ_CYCLED, "Sequence number cycled")            \
  48  _(ENQ_FAIL, "Enqueue failed to crypto device")     \
  49  _(DISCARD, "Not enough crypto operations, discarding frame")  \
  50  _(SESSION, "Failed to get crypto session")         \
  51  _(NOSUP, "Cipher/Auth not supported")
  52
  53
  54 typedef enum
  55 {
  56 #define _(sym,str) ESP_ENCRYPT_ERROR_##sym,
  57   foreach_esp_encrypt_error
  58 #undef _
  59     ESP_ENCRYPT_N_ERROR,
  60 } esp_encrypt_error_t;
  61
  62 static char *esp_encrypt_error_strings[] = {
  63 #define _(sym,string) string,
  64   foreach_esp_encrypt_error
  65 #undef _
  66 };
  67
  68 extern vlib_node_registration_t dpdk_esp4_encrypt_node;
  69 extern vlib_node_registration_t dpdk_esp6_encrypt_node;
  70 extern vlib_node_registration_t dpdk_esp4_encrypt_tun_node;
  71 extern vlib_node_registration_t dpdk_esp6_encrypt_tun_node;
  72
  73 typedef struct
  74 {
  75   ipsec_crypto_alg_t crypto_alg;
  76   ipsec_integ_alg_t integ_alg;
  77   u8 packet_data[64];
  78 } esp_encrypt_trace_t;
  79
  80 /* packet trace format function */
  81 static u8 *
  82 format_esp_encrypt_trace (u8 * s, va_list * args)
  83 {
  84   CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
  85   CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
  86   esp_encrypt_trace_t *t = va_arg (*args, esp_encrypt_trace_t *);
  87   ip4_header_t *ih4 = (ip4_header_t *) t->packet_data;
  88   u32 indent = format_get_indent (s), offset;
  89
  90   s = format (s, "cipher %U auth %U\n",
  91               format_ipsec_crypto_alg, t->crypto_alg,
  92               format_ipsec_integ_alg, t->integ_alg);
  93
  94   if ((ih4->ip_version_and_header_length & 0xF0) == 0x60)
  95     {
  96       s = format (s, "%U%U", format_white_space, indent,
  97                   format_ip6_header, ih4);
  98       offset = sizeof (ip6_header_t);
  99     }
 100   else
 101     {
 102       s = format (s, "%U%U", format_white_space, indent,
 103                   format_ip4_header, ih4);
 104       offset = ip4_header_bytes (ih4);
 105     }
 106
 107   s = format (s, "\n%U%U", format_white_space, indent,
 108               format_esp_header, t->packet_data + offset);
 109
 110   return s;
 111 }
 112
 113 always_inline uword
 114 dpdk_esp_encrypt_inline (vlib_main_t * vm,
 115                          vlib_node_runtime_t * node,
 116                          vlib_frame_t * from_frame, int is_ip6, int is_tun)
 117 {
 118   u32 n_left_from, *from, *to_next, next_index, thread_index;
 119   ipsec_main_t *im = &ipsec_main;
 120   vnet_main_t *vnm = im->vnet_main;
 121   vnet_interface_main_t *vim = &vnm->interface_main;
 122   u32 thread_idx = vlib_get_thread_index ();
 123   dpdk_crypto_main_t *dcm = &dpdk_crypto_main;
 124   crypto_resource_t *res = 0;
 125   ipsec_sa_t *sa0 = 0;
 126   crypto_alg_t *cipher_alg = 0, *auth_alg = 0;
 127   struct rte_cryptodev_sym_session *session = 0;
 128   u32 ret, last_sa_index = ~0;
 129   u8 numa = rte_socket_id ();
 130   u8 is_aead = 0;
 131   crypto_worker_main_t *cwm =
 132     vec_elt_at_index (dcm->workers_main, thread_idx);
 133   struct rte_crypto_op **ops = cwm->ops;
 134
 135   from = vlib_frame_vector_args (from_frame);
 136   n_left_from = from_frame->n_vectors;
 137   thread_index = vm->thread_index;
 138
 139   ret = crypto_alloc_ops (numa, ops, n_left_from);
 140   if (ret)
 141     {
 142       if (is_ip6)
 143         vlib_node_increment_counter (vm, dpdk_esp6_encrypt_node.index,
 144                                      ESP_ENCRYPT_ERROR_DISCARD, 1);
 145       else
 146         vlib_node_increment_counter (vm, dpdk_esp4_encrypt_node.index,
 147                                      ESP_ENCRYPT_ERROR_DISCARD, 1);
 148       /* Discard whole frame */
 149       return n_left_from;
 150     }
 151
 152   next_index = ESP_ENCRYPT_NEXT_DROP;
 153
 154   while (n_left_from > 0)
 155     {
 156       u32 n_left_to_next;
 157
 158       vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
 159
 160       while (n_left_from > 0 && n_left_to_next > 0)
 161         {
 162           clib_error_t *error;
 163           u32 bi0, bi1;
 164           vlib_buffer_t *b0, *b1;
 165           u32 sa_index0;
 166           ip4_and_esp_header_t *ih0, *oh0 = 0;
 167           ip6_and_esp_header_t *ih6_0, *oh6_0 = 0;
 168           ip4_and_udp_and_esp_header_t *ouh0 = 0;
 169           esp_header_t *esp0;
 170           esp_footer_t *f0;
 171           u8 next_hdr_type;
 172           u32 iv_size;
 173           u16 orig_sz;
 174           u8 trunc_size;
 175           u16 rewrite_len;
 176           u16 udp_encap_adv = 0;
 177           struct rte_mbuf *mb0;
 178           struct rte_crypto_op *op;
 179           u16 res_idx;
 180
 181           bi0 = from[0];
 182           from += 1;
 183           n_left_from -= 1;
 184
 185           b0 = vlib_get_buffer (vm, bi0);
 186           ih0 = vlib_buffer_get_current (b0);
 187           mb0 = rte_mbuf_from_vlib_buffer (b0);
 188
 189           /* ih0/ih6_0 */
 190           CLIB_PREFETCH (ih0, sizeof (ih6_0[0]), LOAD);
 191           /* f0 */
 192           CLIB_PREFETCH (vlib_buffer_get_tail (b0), 20, STORE);
 193           /* mb0 */
 194           CLIB_PREFETCH (mb0, CLIB_CACHE_LINE_BYTES, STORE);
 195
 196           if (n_left_from > 1)
 197             {
 198               bi1 = from[1];
 199               b1 = vlib_get_buffer (vm, bi1);
 200
 201               CLIB_PREFETCH (b1, CLIB_CACHE_LINE_BYTES, LOAD);
 202               CLIB_PREFETCH (b1->data - CLIB_CACHE_LINE_BYTES,
 203                              CLIB_CACHE_LINE_BYTES, STORE);
 204             }
 205
 206           op = ops[0];
 207           ops += 1;
 208           ASSERT (op->status == RTE_CRYPTO_OP_STATUS_NOT_PROCESSED);
 209
 210           dpdk_op_priv_t *priv = crypto_op_get_priv (op);
 211           /* store bi in op private */
 212           priv->bi = bi0;
 213           priv->encrypt = 1;
 214
 215           u16 op_len =
 216             sizeof (op[0]) + sizeof (op[0].sym[0]) + sizeof (priv[0]);
 217           CLIB_PREFETCH (op, op_len, STORE);
 218
 219           if (is_tun)
 220             {
 221               /* we are on a ipsec tunnel's feature arc */
 222               vnet_buffer (b0)->ipsec.sad_index =
 223                 sa_index0 = ipsec_tun_protect_get_sa_out
 224                 (vnet_buffer (b0)->ip.adj_index[VLIB_TX]);
 225             }
 226           else
 227             sa_index0 = vnet_buffer (b0)->ipsec.sad_index;
 228
 229           if (sa_index0 != last_sa_index)
 230             {
 231               sa0 = pool_elt_at_index (im->sad, sa_index0);
 232
 233               cipher_alg =
 234                 vec_elt_at_index (dcm->cipher_algs, sa0->crypto_alg);
 235               auth_alg = vec_elt_at_index (dcm->auth_algs, sa0->integ_alg);
 236
 237               is_aead = (cipher_alg->type == RTE_CRYPTO_SYM_XFORM_AEAD);
 238
 239               if (is_aead)
 240                 auth_alg = cipher_alg;
 241
 242               res_idx = get_resource (cwm, sa0);
 243
 244               if (PREDICT_FALSE (res_idx == (u16) ~ 0))
 245                 {
 246                   clib_warning ("unsupported SA by thread index %u",
 247                                 thread_idx);
 248                   if (is_ip6)
 249                     vlib_node_increment_counter (vm,
 250                                                  dpdk_esp6_encrypt_node.index,
 251                                                  ESP_ENCRYPT_ERROR_NOSUP, 1);
 252                   else
 253                     vlib_node_increment_counter (vm,
 254                                                  dpdk_esp4_encrypt_node.index,
 255                                                  ESP_ENCRYPT_ERROR_NOSUP, 1);
 256                   to_next[0] = bi0;
 257                   to_next += 1;
 258                   n_left_to_next -= 1;
 259                   goto trace;
 260                 }
 261               res = vec_elt_at_index (dcm->resource, res_idx);
 262
 263               error = crypto_get_session (&session, sa_index0, res, cwm, 1);
 264               if (PREDICT_FALSE (error || !session))
 265                 {
 266                   clib_warning ("failed to get crypto session");
 267                   if (is_ip6)
 268                     vlib_node_increment_counter (vm,
 269                                                  dpdk_esp6_encrypt_node.index,
 270                                                  ESP_ENCRYPT_ERROR_SESSION,
 271                                                  1);
 272                   else
 273                     vlib_node_increment_counter (vm,
 274                                                  dpdk_esp4_encrypt_node.index,
 275                                                  ESP_ENCRYPT_ERROR_SESSION,
 276                                                  1);
 277                   to_next[0] = bi0;
 278                   to_next += 1;
 279                   n_left_to_next -= 1;
 280                   goto trace;
 281                 }
 282
 283               last_sa_index = sa_index0;
 284             }
 285
 286           if (PREDICT_FALSE (esp_seq_advance (sa0)))
 287             {
 288               clib_warning
 289                 ("sequence number counter has cycled SPI %u (0x%08x)",
 290                  sa0->spi, sa0->spi);
 291               if (is_ip6)
 292                 vlib_node_increment_counter (vm,
 293                                              dpdk_esp6_encrypt_node.index,
 294                                              ESP_ENCRYPT_ERROR_SEQ_CYCLED, 1);
 295               else
 296                 vlib_node_increment_counter (vm,
 297                                              dpdk_esp4_encrypt_node.index,
 298                                              ESP_ENCRYPT_ERROR_SEQ_CYCLED, 1);
 299               //TODO: rekey SA
 300               to_next[0] = bi0;
 301               to_next += 1;
 302               n_left_to_next -= 1;
 303               goto trace;
 304             }
 305
 306           orig_sz = b0->current_length;
 307
 308           /* TODO multi-seg support - total_length_not_including_first_buffer */
 309           vlib_increment_combined_counter
 310             (&ipsec_sa_counters, thread_index, sa_index0,
 311              1, b0->current_length);
 312
 313           /* Update tunnel interface tx counters */
 314           if (is_tun)
 315             vlib_increment_combined_counter
 316               (vim->combined_sw_if_counters + VNET_INTERFACE_COUNTER_TX,
 317                thread_index, vnet_buffer (b0)->sw_if_index[VLIB_TX],
 318                1, b0->current_length);
 319
 320           res->ops[res->n_ops] = op;
 321           res->bi[res->n_ops] = bi0;
 322           res->n_ops += 1;
 323
 324           dpdk_gcm_cnt_blk *icb = &priv->cb;
 325
 326           crypto_set_icb (icb, sa0->salt, sa0->seq, sa0->seq_hi);
 327
 328           iv_size = cipher_alg->iv_len;
 329           trunc_size = auth_alg->trunc_size;
 330
 331           /* if UDP encapsulation is used adjust the address of the IP header */
 332           if (ipsec_sa_is_set_UDP_ENCAP (sa0) && !is_ip6)
 333             udp_encap_adv = sizeof (udp_header_t);
 334
 335           if (ipsec_sa_is_set_IS_TUNNEL (sa0))
 336             {
 337               rewrite_len = 0;
 338               if (!ipsec_sa_is_set_IS_TUNNEL_V6 (sa0))  /* ip4 */
 339                 {
 340                   /* in tunnel mode send it back to FIB */
 341                   priv->next = DPDK_CRYPTO_INPUT_NEXT_IP4_LOOKUP;
 342                   u8 adv = sizeof (ip4_header_t) + udp_encap_adv +
 343                     sizeof (esp_header_t) + iv_size;
 344                   vlib_buffer_advance (b0, -adv);
 345                   oh0 = vlib_buffer_get_current (b0);
 346                   ouh0 = vlib_buffer_get_current (b0);
 347                   next_hdr_type = (is_ip6 ?
 348                                    IP_PROTOCOL_IPV6 : IP_PROTOCOL_IP_IN_IP);
 349                   /*
 350                    * oh0->ip4.ip_version_and_header_length = 0x45;
 351                    * oh0->ip4.tos = ih0->ip4.tos;
 352                    * oh0->ip4.fragment_id = 0;
 353                    * oh0->ip4.flags_and_fragment_offset = 0;
 354                    */
 355                   oh0->ip4.checksum_data_64[0] =
 356                     clib_host_to_net_u64 (0x45ULL << 56);
 357                   /*
 358                    * oh0->ip4.ttl = 254;
 359                    * oh0->ip4.protocol = IP_PROTOCOL_IPSEC_ESP;
 360                    */
 361                   oh0->ip4.checksum_data_32[2] =
 362                     clib_host_to_net_u32 (0xfe320000);
 363
 364                   oh0->ip4.src_address.as_u32 =
 365                     sa0->tunnel_src_addr.ip4.as_u32;
 366                   oh0->ip4.dst_address.as_u32 =
 367                     sa0->tunnel_dst_addr.ip4.as_u32;
 368
 369                   if (ipsec_sa_is_set_UDP_ENCAP (sa0))
 370                     {
 371                       oh0->ip4.protocol = IP_PROTOCOL_UDP;
 372                       esp0 = &ouh0->esp;
 373                     }
 374                   else
 375                     esp0 = &oh0->esp;
 376                   esp0->spi = clib_host_to_net_u32 (sa0->spi);
 377                   esp0->seq = clib_host_to_net_u32 (sa0->seq);
 378                 }
 379               else
 380                 {
 381                   /* ip6 */
 382                   /* in tunnel mode send it back to FIB */
 383                   priv->next = DPDK_CRYPTO_INPUT_NEXT_IP6_LOOKUP;
 384
 385                   u8 adv =
 386                     sizeof (ip6_header_t) + sizeof (esp_header_t) + iv_size;
 387                   vlib_buffer_advance (b0, -adv);
 388                   ih6_0 = (ip6_and_esp_header_t *) ih0;
 389                   oh6_0 = vlib_buffer_get_current (b0);
 390
 391                   next_hdr_type = (is_ip6 ?
 392                                    IP_PROTOCOL_IPV6 : IP_PROTOCOL_IP_IN_IP);
 393
 394                   oh6_0->ip6.ip_version_traffic_class_and_flow_label =
 395                     ih6_0->ip6.ip_version_traffic_class_and_flow_label;
 396
 397                   oh6_0->ip6.protocol = IP_PROTOCOL_IPSEC_ESP;
 398                   oh6_0->ip6.hop_limit = 254;
 399                   oh6_0->ip6.src_address.as_u64[0] =
 400                     sa0->tunnel_src_addr.ip6.as_u64[0];
 401                   oh6_0->ip6.src_address.as_u64[1] =
 402                     sa0->tunnel_src_addr.ip6.as_u64[1];
 403                   oh6_0->ip6.dst_address.as_u64[0] =
 404                     sa0->tunnel_dst_addr.ip6.as_u64[0];
 405                   oh6_0->ip6.dst_address.as_u64[1] =
 406                     sa0->tunnel_dst_addr.ip6.as_u64[1];
 407                   esp0 = &oh6_0->esp;
 408                   oh6_0->esp.spi = clib_host_to_net_u32 (sa0->spi);
 409                   oh6_0->esp.seq = clib_host_to_net_u32 (sa0->seq);
 410                 }
 411
 412               vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
 413             }
 414           else                  /* transport mode */
 415             {
 416               if (is_tun)
 417                 {
 418                   rewrite_len = 0;
 419                   priv->next = DPDK_CRYPTO_INPUT_NEXT_MIDCHAIN;
 420                 }
 421               else
 422                 {
 423                   priv->next = DPDK_CRYPTO_INPUT_NEXT_INTERFACE_OUTPUT;
 424                   rewrite_len = vnet_buffer (b0)->ip.save_rewrite_length;
 425                 }
 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 (oh6_0)
 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 if (oh0)
 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           else                  /* should never happen */
 508             clib_warning ("No outer header found for ESP packet");
 509
 510           b0->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
 511
 512           /* mbuf packet starts at ESP header */
 513           mb0->data_len = vlib_buffer_get_tail (b0) - ((u8 *) esp0);
 514           mb0->pkt_len = vlib_buffer_get_tail (b0) - ((u8 *) esp0);
 515           mb0->data_off = ((void *) esp0) - mb0->buf_addr;
 516
 517           u32 cipher_off, cipher_len, auth_len = 0;
 518           u32 *aad = NULL;
 519
 520           u8 *digest = vlib_buffer_get_tail (b0) - trunc_size;
 521           u64 digest_paddr =
 522             mb0->buf_physaddr + digest - ((u8 *) mb0->buf_addr);
 523
 524           if (!is_aead && (cipher_alg->alg == RTE_CRYPTO_CIPHER_AES_CBC ||
 525                            cipher_alg->alg == RTE_CRYPTO_CIPHER_NULL))
 526             {
 527               cipher_off = sizeof (esp_header_t);
 528               cipher_len = iv_size + pad_payload_len;
 529             }
 530           else                  /* CTR/GCM */
 531             {
 532               u32 *esp_iv = (u32 *) (esp0 + 1);
 533               esp_iv[0] = sa0->seq;
 534               esp_iv[1] = sa0->seq_hi;
 535
 536               cipher_off = sizeof (esp_header_t) + iv_size;
 537               cipher_len = pad_payload_len;
 538             }
 539
 540           if (is_aead)
 541             {
 542               aad = (u32 *) priv->aad;
 543               aad[0] = esp0->spi;
 544
 545               /* aad[3] should always be 0 */
 546               if (PREDICT_FALSE (ipsec_sa_is_set_USE_ESN (sa0)))
 547                 {
 548                   aad[1] = clib_host_to_net_u32 (sa0->seq_hi);
 549                   aad[2] = esp0->seq;
 550                 }
 551               else
 552                 {
 553                   aad[1] = esp0->seq;
 554                   aad[2] = 0;
 555                 }
 556             }
 557           else
 558             {
 559               auth_len =
 560                 vlib_buffer_get_tail (b0) - ((u8 *) esp0) - trunc_size;
 561               if (ipsec_sa_is_set_USE_ESN (sa0))
 562                 {
 563                   u32 *_digest = (u32 *) digest;
 564                   _digest[0] = clib_host_to_net_u32 (sa0->seq_hi);
 565                   auth_len += 4;
 566                 }
 567             }
 568
 569           crypto_op_setup (is_aead, mb0, op, session, cipher_off, cipher_len,
 570                            0, auth_len, (u8 *) aad, digest, digest_paddr);
 571
 572         trace:
 573           if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
 574             {
 575               esp_encrypt_trace_t *tr =
 576                 vlib_add_trace (vm, node, b0, sizeof (*tr));
 577               tr->crypto_alg = sa0->crypto_alg;
 578               tr->integ_alg = sa0->integ_alg;
 579               u8 *p = vlib_buffer_get_current (b0);
 580               if (!ipsec_sa_is_set_IS_TUNNEL (sa0))
 581                 p += vnet_buffer (b0)->ip.save_rewrite_length;
 582               clib_memcpy_fast (tr->packet_data, p, sizeof (tr->packet_data));
 583             }
 584         }
 585       vlib_put_next_frame (vm, node, next_index, n_left_to_next);
 586     }
 587   if (is_ip6)
 588     {
 589       vlib_node_increment_counter (vm,
 590                                    (is_tun ?
 591                                     dpdk_esp6_encrypt_tun_node.index :
 592                                     dpdk_esp6_encrypt_node.index),
 593                                    ESP_ENCRYPT_ERROR_RX_PKTS,
 594                                    from_frame->n_vectors);
 595
 596       crypto_enqueue_ops (vm, cwm, dpdk_esp6_encrypt_node.index,
 597                           ESP_ENCRYPT_ERROR_ENQ_FAIL, numa, 1 /* encrypt */ );
 598     }
 599   else
 600     {
 601       vlib_node_increment_counter (vm,
 602                                    (is_tun ?
 603                                     dpdk_esp4_encrypt_tun_node.index :
 604                                     dpdk_esp4_encrypt_node.index),
 605                                    ESP_ENCRYPT_ERROR_RX_PKTS,
 606                                    from_frame->n_vectors);
 607
 608       crypto_enqueue_ops (vm, cwm, dpdk_esp4_encrypt_node.index,
 609                           ESP_ENCRYPT_ERROR_ENQ_FAIL, numa, 1 /* encrypt */ );
 610     }
 611
 612   crypto_free_ops (numa, ops, cwm->ops + from_frame->n_vectors - ops);
 613
 614   return from_frame->n_vectors;
 615 }
 616
 617 VLIB_NODE_FN (dpdk_esp4_encrypt_node) (vlib_main_t * vm,
 618                                        vlib_node_runtime_t * node,
 619                                        vlib_frame_t * from_frame)
 620 {
 621   return dpdk_esp_encrypt_inline (vm, node, from_frame, 0 /*is_ip6 */ , 0);
 622 }
 623
 624 /* *INDENT-OFF* */
 625 VLIB_REGISTER_NODE (dpdk_esp4_encrypt_node) = {
 626   .name = "dpdk-esp4-encrypt",
 627   .flags = VLIB_NODE_FLAG_IS_OUTPUT,
 628   .vector_size = sizeof (u32),
 629   .format_trace = format_esp_encrypt_trace,
 630   .n_errors = ARRAY_LEN (esp_encrypt_error_strings),
 631   .error_strings = esp_encrypt_error_strings,
 632   .n_next_nodes = 1,
 633   .next_nodes =
 634     {
 635       [ESP_ENCRYPT_NEXT_DROP] = "error-drop",
 636     }
 637 };
 638 /* *INDENT-ON* */
 639
 640 VLIB_NODE_FN (dpdk_esp6_encrypt_node) (vlib_main_t * vm,
 641                                        vlib_node_runtime_t * node,
 642                                        vlib_frame_t * from_frame)
 643 {
 644   return dpdk_esp_encrypt_inline (vm, node, from_frame, 1 /*is_ip6 */ , 0);
 645 }
 646
 647 /* *INDENT-OFF* */
 648 VLIB_REGISTER_NODE (dpdk_esp6_encrypt_node) = {
 649   .name = "dpdk-esp6-encrypt",
 650   .flags = VLIB_NODE_FLAG_IS_OUTPUT,
 651   .vector_size = sizeof (u32),
 652   .format_trace = format_esp_encrypt_trace,
 653   .n_errors = ARRAY_LEN (esp_encrypt_error_strings),
 654   .error_strings = esp_encrypt_error_strings,
 655   .n_next_nodes = 1,
 656   .next_nodes =
 657     {
 658       [ESP_ENCRYPT_NEXT_DROP] = "error-drop",
 659     }
 660 };
 661 /* *INDENT-ON* */
 662
 663 VLIB_NODE_FN (dpdk_esp4_encrypt_tun_node) (vlib_main_t * vm,
 664                                            vlib_node_runtime_t * node,
 665                                            vlib_frame_t * from_frame)
 666 {
 667   return dpdk_esp_encrypt_inline (vm, node, from_frame, 0 /*is_ip6 */ , 1);
 668 }
 669
 670 /* *INDENT-OFF* */
 671 VLIB_REGISTER_NODE (dpdk_esp4_encrypt_tun_node) = {
 672   .name = "dpdk-esp4-encrypt-tun",
 673   .flags = VLIB_NODE_FLAG_IS_OUTPUT,
 674   .vector_size = sizeof (u32),
 675   .format_trace = format_esp_encrypt_trace,
 676   .n_errors = ARRAY_LEN (esp_encrypt_error_strings),
 677   .error_strings = esp_encrypt_error_strings,
 678   .n_next_nodes = 1,
 679   .next_nodes =
 680     {
 681       [ESP_ENCRYPT_NEXT_DROP] = "error-drop",
 682     }
 683 };
 684
 685 VNET_FEATURE_INIT (dpdk_esp4_encrypt_tun_feat_node, static) =
 686 {
 687   .arc_name = "ip4-output",
 688   .node_name = "dpdk-esp4-encrypt-tun",
 689   .runs_before = VNET_FEATURES ("adj-midchain-tx"),
 690 };
 691 /* *INDENT-ON* */
 692
 693 VLIB_NODE_FN (dpdk_esp6_encrypt_tun_node) (vlib_main_t * vm,
 694                                            vlib_node_runtime_t * node,
 695                                            vlib_frame_t * from_frame)
 696 {
 697   return dpdk_esp_encrypt_inline (vm, node, from_frame, 1 /*is_ip6 */ , 1);
 698 }
 699
 700 /* *INDENT-OFF* */
 701 VLIB_REGISTER_NODE (dpdk_esp6_encrypt_tun_node) = {
 702   .name = "dpdk-esp6-encrypt-tun",
 703   .flags = VLIB_NODE_FLAG_IS_OUTPUT,
 704   .vector_size = sizeof (u32),
 705   .format_trace = format_esp_encrypt_trace,
 706   .n_errors = ARRAY_LEN (esp_encrypt_error_strings),
 707   .error_strings = esp_encrypt_error_strings,
 708   .n_next_nodes = 1,
 709   .next_nodes =
 710     {
 711       [ESP_ENCRYPT_NEXT_DROP] = "error-drop",
 712     }
 713 };
 714
 715 VNET_FEATURE_INIT (dpdk_esp6_encrypt_tun_feat_node, static) =
 716 {
 717   .arc_name = "ip6-output",
 718   .node_name = "dpdk-esp6-encrypt-tun",
 719   .runs_before = VNET_FEATURES ("adj-midchain-tx"),
 720 };
 721 /* *INDENT-ON* */
 722
 723 /*
 724  * fd.io coding-style-patch-verification: ON
 725  *
 726  * Local Variables:
 727  * eval: (c-set-style "gnu")
 728  * End:
 729  */