examples/ipsec-secgw/ipsec.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2016-2017 Intel Corporation
   3  */
   4 #include <sys/types.h>
   5 #include <netinet/in.h>
   6 #include <netinet/ip.h>
   7
   8 #include <rte_branch_prediction.h>
   9 #include <rte_log.h>
  10 #include <rte_crypto.h>
  11 #include <rte_security.h>
  12 #include <rte_cryptodev.h>
  13 #include <rte_ethdev.h>
  14 #include <rte_mbuf.h>
  15 #include <rte_hash.h>
  16
  17 #include "ipsec.h"
  18 #include "esp.h"
  19
  20 static inline void
  21 set_ipsec_conf(struct ipsec_sa *sa, struct rte_security_ipsec_xform *ipsec)
  22 {
  23         if (ipsec->mode == RTE_SECURITY_IPSEC_SA_MODE_TUNNEL) {
  24                 struct rte_security_ipsec_tunnel_param *tunnel =
  25                                 &ipsec->tunnel;
  26                 if (sa->flags == IP4_TUNNEL) {
  27                         tunnel->type =
  28                                 RTE_SECURITY_IPSEC_TUNNEL_IPV4;
  29                         tunnel->ipv4.ttl = IPDEFTTL;
  30
  31                         memcpy((uint8_t *)&tunnel->ipv4.src_ip,
  32                                 (uint8_t *)&sa->src.ip.ip4, 4);
  33
  34                         memcpy((uint8_t *)&tunnel->ipv4.dst_ip,
  35                                 (uint8_t *)&sa->dst.ip.ip4, 4);
  36                 }
  37                 /* TODO support for Transport and IPV6 tunnel */
  38         }
  39         ipsec->esn_soft_limit = IPSEC_OFFLOAD_ESN_SOFTLIMIT;
  40 }
  41
  42 static inline int
  43 create_session(struct ipsec_ctx *ipsec_ctx, struct ipsec_sa *sa)
  44 {
  45         struct rte_cryptodev_info cdev_info;
  46         unsigned long cdev_id_qp = 0;
  47         int32_t ret = 0;
  48         struct cdev_key key = { 0 };
  49
  50         key.lcore_id = (uint8_t)rte_lcore_id();
  51
  52         key.cipher_algo = (uint8_t)sa->cipher_algo;
  53         key.auth_algo = (uint8_t)sa->auth_algo;
  54         key.aead_algo = (uint8_t)sa->aead_algo;
  55
  56         if (sa->type == RTE_SECURITY_ACTION_TYPE_NONE) {
  57                 ret = rte_hash_lookup_data(ipsec_ctx->cdev_map, &key,
  58                                 (void **)&cdev_id_qp);
  59                 if (ret < 0) {
  60                         RTE_LOG(ERR, IPSEC,
  61                                 "No cryptodev: core %u, cipher_algo %u, "
  62                                 "auth_algo %u, aead_algo %u\n",
  63                                 key.lcore_id,
  64                                 key.cipher_algo,
  65                                 key.auth_algo,
  66                                 key.aead_algo);
  67                         return -1;
  68                 }
  69         }
  70
  71         RTE_LOG_DP(DEBUG, IPSEC, "Create session for SA spi %u on cryptodev "
  72                         "%u qp %u\n", sa->spi,
  73                         ipsec_ctx->tbl[cdev_id_qp].id,
  74                         ipsec_ctx->tbl[cdev_id_qp].qp);
  75
  76         if (sa->type != RTE_SECURITY_ACTION_TYPE_NONE) {
  77                 struct rte_security_session_conf sess_conf = {
  78                         .action_type = sa->type,
  79                         .protocol = RTE_SECURITY_PROTOCOL_IPSEC,
  80                         {.ipsec = {
  81                                 .spi = sa->spi,
  82                                 .salt = sa->salt,
  83                                 .options = { 0 },
  84                                 .direction = sa->direction,
  85                                 .proto = RTE_SECURITY_IPSEC_SA_PROTO_ESP,
  86                                 .mode = (sa->flags == IP4_TUNNEL ||
  87                                                 sa->flags == IP6_TUNNEL) ?
  88                                         RTE_SECURITY_IPSEC_SA_MODE_TUNNEL :
  89                                         RTE_SECURITY_IPSEC_SA_MODE_TRANSPORT,
  90                         } },
  91                         .crypto_xform = sa->xforms,
  92                         .userdata = NULL,
  93
  94                 };
  95
  96                 if (sa->type == RTE_SECURITY_ACTION_TYPE_LOOKASIDE_PROTOCOL) {
  97                         struct rte_security_ctx *ctx = (struct rte_security_ctx *)
  98                                                         rte_cryptodev_get_sec_ctx(
  99                                                         ipsec_ctx->tbl[cdev_id_qp].id);
 100
 101                         /* Set IPsec parameters in conf */
 102                         set_ipsec_conf(sa, &(sess_conf.ipsec));
 103
 104                         sa->sec_session = rte_security_session_create(ctx,
 105                                         &sess_conf, ipsec_ctx->session_pool);
 106                         if (sa->sec_session == NULL) {
 107                                 RTE_LOG(ERR, IPSEC,
 108                                 "SEC Session init failed: err: %d\n", ret);
 109                                 return -1;
 110                         }
 111                 } else if (sa->type == RTE_SECURITY_ACTION_TYPE_INLINE_CRYPTO) {
 112                         struct rte_flow_error err;
 113                         struct rte_security_ctx *ctx = (struct rte_security_ctx *)
 114                                                         rte_eth_dev_get_sec_ctx(
 115                                                         sa->portid);
 116                         const struct rte_security_capability *sec_cap;
 117                         int ret = 0;
 118
 119                         sa->sec_session = rte_security_session_create(ctx,
 120                                         &sess_conf, ipsec_ctx->session_pool);
 121                         if (sa->sec_session == NULL) {
 122                                 RTE_LOG(ERR, IPSEC,
 123                                 "SEC Session init failed: err: %d\n", ret);
 124                                 return -1;
 125                         }
 126
 127                         sec_cap = rte_security_capabilities_get(ctx);
 128
 129                         /* iterate until ESP tunnel*/
 130                         while (sec_cap->action !=
 131                                         RTE_SECURITY_ACTION_TYPE_NONE) {
 132
 133                                 if (sec_cap->action == sa->type &&
 134                                     sec_cap->protocol ==
 135                                         RTE_SECURITY_PROTOCOL_IPSEC &&
 136                                     sec_cap->ipsec.mode ==
 137                                         RTE_SECURITY_IPSEC_SA_MODE_TUNNEL &&
 138                                     sec_cap->ipsec.direction == sa->direction)
 139                                         break;
 140                                 sec_cap++;
 141                         }
 142
 143                         if (sec_cap->action == RTE_SECURITY_ACTION_TYPE_NONE) {
 144                                 RTE_LOG(ERR, IPSEC,
 145                                 "No suitable security capability found\n");
 146                                 return -1;
 147                         }
 148
 149                         sa->ol_flags = sec_cap->ol_flags;
 150                         sa->security_ctx = ctx;
 151                         sa->pattern[0].type = RTE_FLOW_ITEM_TYPE_ETH;
 152
 153                         sa->pattern[1].type = RTE_FLOW_ITEM_TYPE_IPV4;
 154                         sa->pattern[1].mask = &rte_flow_item_ipv4_mask;
 155                         if (sa->flags & IP6_TUNNEL) {
 156                                 sa->pattern[1].spec = &sa->ipv6_spec;
 157                                 memcpy(sa->ipv6_spec.hdr.dst_addr,
 158                                         sa->dst.ip.ip6.ip6_b, 16);
 159                                 memcpy(sa->ipv6_spec.hdr.src_addr,
 160                                        sa->src.ip.ip6.ip6_b, 16);
 161                         } else {
 162                                 sa->pattern[1].spec = &sa->ipv4_spec;
 163                                 sa->ipv4_spec.hdr.dst_addr = sa->dst.ip.ip4;
 164                                 sa->ipv4_spec.hdr.src_addr = sa->src.ip.ip4;
 165                         }
 166
 167                         sa->pattern[2].type = RTE_FLOW_ITEM_TYPE_ESP;
 168                         sa->pattern[2].spec = &sa->esp_spec;
 169                         sa->pattern[2].mask = &rte_flow_item_esp_mask;
 170                         sa->esp_spec.hdr.spi = rte_cpu_to_be_32(sa->spi);
 171
 172                         sa->pattern[3].type = RTE_FLOW_ITEM_TYPE_END;
 173
 174                         sa->action[0].type = RTE_FLOW_ACTION_TYPE_SECURITY;
 175                         sa->action[0].conf = sa->sec_session;
 176
 177                         sa->action[1].type = RTE_FLOW_ACTION_TYPE_END;
 178
 179                         sa->attr.egress = (sa->direction ==
 180                                         RTE_SECURITY_IPSEC_SA_DIR_EGRESS);
 181                         sa->attr.ingress = (sa->direction ==
 182                                         RTE_SECURITY_IPSEC_SA_DIR_INGRESS);
 183                         if (sa->attr.ingress) {
 184                                 uint8_t rss_key[40];
 185                                 struct rte_eth_rss_conf rss_conf = {
 186                                         .rss_key = rss_key,
 187                                         .rss_key_len = 40,
 188                                 };
 189                                 struct rte_eth_dev *eth_dev;
 190                                 union {
 191                                         struct rte_flow_action_rss rss;
 192                                         struct {
 193                                         const struct rte_eth_rss_conf *rss_conf;
 194                                         uint16_t num;
 195                                         uint16_t queue[RTE_MAX_QUEUES_PER_PORT];
 196                                         } local;
 197                                 } action_rss;
 198                                 unsigned int i;
 199                                 unsigned int j;
 200
 201                                 sa->action[2].type = RTE_FLOW_ACTION_TYPE_END;
 202                                 /* Try RSS. */
 203                                 sa->action[1].type = RTE_FLOW_ACTION_TYPE_RSS;
 204                                 sa->action[1].conf = &action_rss;
 205                                 eth_dev = ctx->device;
 206                                 rte_eth_dev_rss_hash_conf_get(sa->portid,
 207                                                               &rss_conf);
 208                                 for (i = 0, j = 0;
 209                                      i < eth_dev->data->nb_rx_queues; ++i)
 210                                         if (eth_dev->data->rx_queues[i])
 211                                                 action_rss.local.queue[j++] = i;
 212                                 action_rss.local.num = j;
 213                                 action_rss.local.rss_conf = &rss_conf;
 214                                 ret = rte_flow_validate(sa->portid, &sa->attr,
 215                                                         sa->pattern, sa->action,
 216                                                         &err);
 217                                 if (!ret)
 218                                         goto flow_create;
 219                                 /* Try Queue. */
 220                                 sa->action[1].type = RTE_FLOW_ACTION_TYPE_QUEUE;
 221                                 sa->action[1].conf =
 222                                         &(struct rte_flow_action_queue){
 223                                         .index = 0,
 224                                 };
 225                                 ret = rte_flow_validate(sa->portid, &sa->attr,
 226                                                         sa->pattern, sa->action,
 227                                                         &err);
 228                                 /* Try End. */
 229                                 sa->action[1].type = RTE_FLOW_ACTION_TYPE_END;
 230                                 sa->action[1].conf = NULL;
 231                                 ret = rte_flow_validate(sa->portid, &sa->attr,
 232                                                         sa->pattern, sa->action,
 233                                                         &err);
 234                                 if (ret)
 235                                         goto flow_create_failure;
 236                         } else if (sa->attr.egress &&
 237                                    (sa->ol_flags &
 238                                     RTE_SECURITY_TX_HW_TRAILER_OFFLOAD)) {
 239                                 sa->action[1].type =
 240                                         RTE_FLOW_ACTION_TYPE_PASSTHRU;
 241                                 sa->action[2].type =
 242                                         RTE_FLOW_ACTION_TYPE_END;
 243                         }
 244 flow_create:
 245                         sa->flow = rte_flow_create(sa->portid,
 246                                 &sa->attr, sa->pattern, sa->action, &err);
 247                         if (sa->flow == NULL) {
 248 flow_create_failure:
 249                                 RTE_LOG(ERR, IPSEC,
 250                                         "Failed to create ipsec flow msg: %s\n",
 251                                         err.message);
 252                                 return -1;
 253                         }
 254                 } else if (sa->type ==
 255                                 RTE_SECURITY_ACTION_TYPE_INLINE_PROTOCOL) {
 256                         struct rte_security_ctx *ctx =
 257                                         (struct rte_security_ctx *)
 258                                         rte_eth_dev_get_sec_ctx(sa->portid);
 259                         const struct rte_security_capability *sec_cap;
 260
 261                         if (ctx == NULL) {
 262                                 RTE_LOG(ERR, IPSEC,
 263                                 "Ethernet device doesn't have security features registered\n");
 264                                 return -1;
 265                         }
 266
 267                         /* Set IPsec parameters in conf */
 268                         set_ipsec_conf(sa, &(sess_conf.ipsec));
 269
 270                         /* Save SA as userdata for the security session. When
 271                          * the packet is received, this userdata will be
 272                          * retrieved using the metadata from the packet.
 273                          *
 274                          * The PMD is expected to set similar metadata for other
 275                          * operations, like rte_eth_event, which are tied to
 276                          * security session. In such cases, the userdata could
 277                          * be obtained to uniquely identify the security
 278                          * parameters denoted.
 279                          */
 280
 281                         sess_conf.userdata = (void *) sa;
 282
 283                         sa->sec_session = rte_security_session_create(ctx,
 284                                         &sess_conf, ipsec_ctx->session_pool);
 285                         if (sa->sec_session == NULL) {
 286                                 RTE_LOG(ERR, IPSEC,
 287                                 "SEC Session init failed: err: %d\n", ret);
 288                                 return -1;
 289                         }
 290
 291                         sec_cap = rte_security_capabilities_get(ctx);
 292
 293                         if (sec_cap == NULL) {
 294                                 RTE_LOG(ERR, IPSEC,
 295                                 "No capabilities registered\n");
 296                                 return -1;
 297                         }
 298
 299                         /* iterate until ESP tunnel*/
 300                         while (sec_cap->action !=
 301                                         RTE_SECURITY_ACTION_TYPE_NONE) {
 302
 303                                 if (sec_cap->action == sa->type &&
 304                                     sec_cap->protocol ==
 305                                         RTE_SECURITY_PROTOCOL_IPSEC &&
 306                                     sec_cap->ipsec.mode ==
 307                                         RTE_SECURITY_IPSEC_SA_MODE_TUNNEL &&
 308                                     sec_cap->ipsec.direction == sa->direction)
 309                                         break;
 310                                 sec_cap++;
 311                         }
 312
 313                         if (sec_cap->action == RTE_SECURITY_ACTION_TYPE_NONE) {
 314                                 RTE_LOG(ERR, IPSEC,
 315                                 "No suitable security capability found\n");
 316                                 return -1;
 317                         }
 318
 319                         sa->ol_flags = sec_cap->ol_flags;
 320                         sa->security_ctx = ctx;
 321                 }
 322         } else {
 323                 sa->crypto_session = rte_cryptodev_sym_session_create(
 324                                 ipsec_ctx->session_pool);
 325                 rte_cryptodev_sym_session_init(ipsec_ctx->tbl[cdev_id_qp].id,
 326                                 sa->crypto_session, sa->xforms,
 327                                 ipsec_ctx->session_pool);
 328
 329                 rte_cryptodev_info_get(ipsec_ctx->tbl[cdev_id_qp].id,
 330                                 &cdev_info);
 331                 if (cdev_info.sym.max_nb_sessions_per_qp > 0) {
 332                         ret = rte_cryptodev_queue_pair_attach_sym_session(
 333                                         ipsec_ctx->tbl[cdev_id_qp].id,
 334                                         ipsec_ctx->tbl[cdev_id_qp].qp,
 335                                         sa->crypto_session);
 336                         if (ret < 0) {
 337                                 RTE_LOG(ERR, IPSEC,
 338                                         "Session cannot be attached to qp %u\n",
 339                                         ipsec_ctx->tbl[cdev_id_qp].qp);
 340                                 return -1;
 341                         }
 342                 }
 343         }
 344         sa->cdev_id_qp = cdev_id_qp;
 345
 346         return 0;
 347 }
 348
 349 static inline void
 350 enqueue_cop(struct cdev_qp *cqp, struct rte_crypto_op *cop)
 351 {
 352         int32_t ret, i;
 353
 354         cqp->buf[cqp->len++] = cop;
 355
 356         if (cqp->len == MAX_PKT_BURST) {
 357                 ret = rte_cryptodev_enqueue_burst(cqp->id, cqp->qp,
 358                                 cqp->buf, cqp->len);
 359                 if (ret < cqp->len) {
 360                         RTE_LOG_DP(DEBUG, IPSEC, "Cryptodev %u queue %u:"
 361                                         " enqueued %u crypto ops out of %u\n",
 362                                          cqp->id, cqp->qp,
 363                                          ret, cqp->len);
 364                         for (i = ret; i < cqp->len; i++)
 365                                 rte_pktmbuf_free(cqp->buf[i]->sym->m_src);
 366                 }
 367                 cqp->in_flight += ret;
 368                 cqp->len = 0;
 369         }
 370 }
 371
 372 static inline void
 373 ipsec_enqueue(ipsec_xform_fn xform_func, struct ipsec_ctx *ipsec_ctx,
 374                 struct rte_mbuf *pkts[], struct ipsec_sa *sas[],
 375                 uint16_t nb_pkts)
 376 {
 377         int32_t ret = 0, i;
 378         struct ipsec_mbuf_metadata *priv;
 379         struct rte_crypto_sym_op *sym_cop;
 380         struct ipsec_sa *sa;
 381
 382         for (i = 0; i < nb_pkts; i++) {
 383                 if (unlikely(sas[i] == NULL)) {
 384                         rte_pktmbuf_free(pkts[i]);
 385                         continue;
 386                 }
 387
 388                 rte_prefetch0(sas[i]);
 389                 rte_prefetch0(pkts[i]);
 390
 391                 priv = get_priv(pkts[i]);
 392                 sa = sas[i];
 393                 priv->sa = sa;
 394
 395                 switch (sa->type) {
 396                 case RTE_SECURITY_ACTION_TYPE_LOOKASIDE_PROTOCOL:
 397                         priv->cop.type = RTE_CRYPTO_OP_TYPE_SYMMETRIC;
 398                         priv->cop.status = RTE_CRYPTO_OP_STATUS_NOT_PROCESSED;
 399
 400                         rte_prefetch0(&priv->sym_cop);
 401
 402                         if ((unlikely(sa->sec_session == NULL)) &&
 403                                         create_session(ipsec_ctx, sa)) {
 404                                 rte_pktmbuf_free(pkts[i]);
 405                                 continue;
 406                         }
 407
 408                         sym_cop = get_sym_cop(&priv->cop);
 409                         sym_cop->m_src = pkts[i];
 410
 411                         rte_security_attach_session(&priv->cop,
 412                                         sa->sec_session);
 413                         break;
 414                 case RTE_SECURITY_ACTION_TYPE_NONE:
 415
 416                         priv->cop.type = RTE_CRYPTO_OP_TYPE_SYMMETRIC;
 417                         priv->cop.status = RTE_CRYPTO_OP_STATUS_NOT_PROCESSED;
 418
 419                         rte_prefetch0(&priv->sym_cop);
 420
 421                         if ((unlikely(sa->crypto_session == NULL)) &&
 422                                         create_session(ipsec_ctx, sa)) {
 423                                 rte_pktmbuf_free(pkts[i]);
 424                                 continue;
 425                         }
 426
 427                         rte_crypto_op_attach_sym_session(&priv->cop,
 428                                         sa->crypto_session);
 429
 430                         ret = xform_func(pkts[i], sa, &priv->cop);
 431                         if (unlikely(ret)) {
 432                                 rte_pktmbuf_free(pkts[i]);
 433                                 continue;
 434                         }
 435                         break;
 436                 case RTE_SECURITY_ACTION_TYPE_INLINE_PROTOCOL:
 437                         if ((unlikely(sa->sec_session == NULL)) &&
 438                                         create_session(ipsec_ctx, sa)) {
 439                                 rte_pktmbuf_free(pkts[i]);
 440                                 continue;
 441                         }
 442
 443                         ipsec_ctx->ol_pkts[ipsec_ctx->ol_pkts_cnt++] = pkts[i];
 444                         if (sa->ol_flags & RTE_SECURITY_TX_OLOAD_NEED_MDATA)
 445                                 rte_security_set_pkt_metadata(
 446                                                 sa->security_ctx,
 447                                                 sa->sec_session, pkts[i], NULL);
 448                         continue;
 449                 case RTE_SECURITY_ACTION_TYPE_INLINE_CRYPTO:
 450                         priv->cop.type = RTE_CRYPTO_OP_TYPE_SYMMETRIC;
 451                         priv->cop.status = RTE_CRYPTO_OP_STATUS_NOT_PROCESSED;
 452
 453                         rte_prefetch0(&priv->sym_cop);
 454
 455                         if ((unlikely(sa->sec_session == NULL)) &&
 456                                         create_session(ipsec_ctx, sa)) {
 457                                 rte_pktmbuf_free(pkts[i]);
 458                                 continue;
 459                         }
 460
 461                         rte_security_attach_session(&priv->cop,
 462                                         sa->sec_session);
 463
 464                         ret = xform_func(pkts[i], sa, &priv->cop);
 465                         if (unlikely(ret)) {
 466                                 rte_pktmbuf_free(pkts[i]);
 467                                 continue;
 468                         }
 469
 470                         ipsec_ctx->ol_pkts[ipsec_ctx->ol_pkts_cnt++] = pkts[i];
 471                         if (sa->ol_flags & RTE_SECURITY_TX_OLOAD_NEED_MDATA)
 472                                 rte_security_set_pkt_metadata(
 473                                                 sa->security_ctx,
 474                                                 sa->sec_session, pkts[i], NULL);
 475                         continue;
 476                 }
 477
 478                 RTE_ASSERT(sa->cdev_id_qp < ipsec_ctx->nb_qps);
 479                 enqueue_cop(&ipsec_ctx->tbl[sa->cdev_id_qp], &priv->cop);
 480         }
 481 }
 482
 483 static inline int
 484 ipsec_dequeue(ipsec_xform_fn xform_func, struct ipsec_ctx *ipsec_ctx,
 485               struct rte_mbuf *pkts[], uint16_t max_pkts)
 486 {
 487         int32_t nb_pkts = 0, ret = 0, i, j, nb_cops;
 488         struct ipsec_mbuf_metadata *priv;
 489         struct rte_crypto_op *cops[max_pkts];
 490         struct ipsec_sa *sa;
 491         struct rte_mbuf *pkt;
 492
 493         for (i = 0; i < ipsec_ctx->nb_qps && nb_pkts < max_pkts;) {
 494                 struct cdev_qp *cqp;
 495                 cqp = &ipsec_ctx->tbl[ipsec_ctx->last_qp];
 496
 497                 while (ipsec_ctx->ol_pkts_cnt > 0 && nb_pkts < max_pkts) {
 498                         pkt = ipsec_ctx->ol_pkts[--ipsec_ctx->ol_pkts_cnt];
 499                         rte_prefetch0(pkt);
 500                         priv = get_priv(pkt);
 501                         sa = priv->sa;
 502                         ret = xform_func(pkt, sa, &priv->cop);
 503                         if (unlikely(ret)) {
 504                                 rte_pktmbuf_free(pkt);
 505                                 continue;
 506                         }
 507                         pkts[nb_pkts++] = pkt;
 508                 }
 509
 510                 if (cqp->in_flight == 0) {
 511                         ipsec_ctx->last_qp++;
 512                         if (ipsec_ctx->last_qp == ipsec_ctx->nb_qps)
 513                                 ipsec_ctx->last_qp %= ipsec_ctx->nb_qps;
 514                         i++;
 515                         continue;
 516                 }
 517
 518                 nb_cops = rte_cryptodev_dequeue_burst(cqp->id, cqp->qp,
 519                                 cops, max_pkts - nb_pkts);
 520
 521                 cqp->in_flight -= nb_cops;
 522
 523                 for (j = 0; j < nb_cops; j++) {
 524                         pkt = cops[j]->sym->m_src;
 525                         rte_prefetch0(pkt);
 526
 527                         priv = get_priv(pkt);
 528                         sa = priv->sa;
 529
 530                         RTE_ASSERT(sa != NULL);
 531
 532                         if (sa->type == RTE_SECURITY_ACTION_TYPE_NONE) {
 533                                 ret = xform_func(pkt, sa, cops[j]);
 534                                 if (unlikely(ret)) {
 535                                         rte_pktmbuf_free(pkt);
 536                                         continue;
 537                                 }
 538                         }
 539                         pkts[nb_pkts++] = pkt;
 540                         if (cqp->in_flight < max_pkts) {
 541                                 ipsec_ctx->last_qp++;
 542                                 if (ipsec_ctx->last_qp == ipsec_ctx->nb_qps)
 543                                         ipsec_ctx->last_qp %= ipsec_ctx->nb_qps;
 544                                 i++;
 545                         }
 546                 }
 547         }
 548
 549         /* return packets */
 550         return nb_pkts;
 551 }
 552
 553 uint16_t
 554 ipsec_inbound(struct ipsec_ctx *ctx, struct rte_mbuf *pkts[],
 555                 uint16_t nb_pkts, uint16_t len)
 556 {
 557         struct ipsec_sa *sas[nb_pkts];
 558
 559         inbound_sa_lookup(ctx->sa_ctx, pkts, sas, nb_pkts);
 560
 561         ipsec_enqueue(esp_inbound, ctx, pkts, sas, nb_pkts);
 562
 563         return ipsec_dequeue(esp_inbound_post, ctx, pkts, len);
 564 }
 565
 566 uint16_t
 567 ipsec_outbound(struct ipsec_ctx *ctx, struct rte_mbuf *pkts[],
 568                 uint32_t sa_idx[], uint16_t nb_pkts, uint16_t len)
 569 {
 570         struct ipsec_sa *sas[nb_pkts];
 571
 572         outbound_sa_lookup(ctx->sa_ctx, sa_idx, sas, nb_pkts);
 573
 574         ipsec_enqueue(esp_outbound, ctx, pkts, sas, nb_pkts);
 575
 576         return ipsec_dequeue(esp_outbound_post, ctx, pkts, len);
 577 }