examples/ipsec-secgw/sa.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2016-2020 Intel Corporation
   3  */
   4
   5 /*
   6  * Security Associations
   7  */
   8 #include <sys/types.h>
   9 #include <netinet/in.h>
  10 #include <netinet/ip.h>
  11 #include <netinet/ip6.h>
  12
  13 #include <rte_memzone.h>
  14 #include <rte_crypto.h>
  15 #include <rte_security.h>
  16 #include <rte_cryptodev.h>
  17 #include <rte_byteorder.h>
  18 #include <rte_errno.h>
  19 #include <rte_ip.h>
  20 #include <rte_random.h>
  21 #include <rte_ethdev.h>
  22 #include <rte_malloc.h>
  23
  24 #include "ipsec.h"
  25 #include "esp.h"
  26 #include "parser.h"
  27 #include "sad.h"
  28
  29 #define IPDEFTTL 64
  30
  31 #define IP4_FULL_MASK (sizeof(((struct ip_addr *)NULL)->ip.ip4) * CHAR_BIT)
  32
  33 #define IP6_FULL_MASK (sizeof(((struct ip_addr *)NULL)->ip.ip6.ip6) * CHAR_BIT)
  34
  35 #define MBUF_NO_SEC_OFFLOAD(m) ((m->ol_flags & PKT_RX_SEC_OFFLOAD) == 0)
  36
  37 struct supported_cipher_algo {
  38         const char *keyword;
  39         enum rte_crypto_cipher_algorithm algo;
  40         uint16_t iv_len;
  41         uint16_t block_size;
  42         uint16_t key_len;
  43 };
  44
  45 struct supported_auth_algo {
  46         const char *keyword;
  47         enum rte_crypto_auth_algorithm algo;
  48         uint16_t digest_len;
  49         uint16_t key_len;
  50         uint8_t key_not_req;
  51 };
  52
  53 struct supported_aead_algo {
  54         const char *keyword;
  55         enum rte_crypto_aead_algorithm algo;
  56         uint16_t iv_len;
  57         uint16_t block_size;
  58         uint16_t digest_len;
  59         uint16_t key_len;
  60         uint8_t aad_len;
  61 };
  62
  63
  64 const struct supported_cipher_algo cipher_algos[] = {
  65         {
  66                 .keyword = "null",
  67                 .algo = RTE_CRYPTO_CIPHER_NULL,
  68                 .iv_len = 0,
  69                 .block_size = 4,
  70                 .key_len = 0
  71         },
  72         {
  73                 .keyword = "aes-128-cbc",
  74                 .algo = RTE_CRYPTO_CIPHER_AES_CBC,
  75                 .iv_len = 16,
  76                 .block_size = 16,
  77                 .key_len = 16
  78         },
  79         {
  80                 .keyword = "aes-256-cbc",
  81                 .algo = RTE_CRYPTO_CIPHER_AES_CBC,
  82                 .iv_len = 16,
  83                 .block_size = 16,
  84                 .key_len = 32
  85         },
  86         {
  87                 .keyword = "aes-128-ctr",
  88                 .algo = RTE_CRYPTO_CIPHER_AES_CTR,
  89                 .iv_len = 8,
  90                 .block_size = 4,
  91                 .key_len = 20
  92         },
  93         {
  94                 .keyword = "3des-cbc",
  95                 .algo = RTE_CRYPTO_CIPHER_3DES_CBC,
  96                 .iv_len = 8,
  97                 .block_size = 8,
  98                 .key_len = 24
  99         }
 100 };
 101
 102 const struct supported_auth_algo auth_algos[] = {
 103         {
 104                 .keyword = "null",
 105                 .algo = RTE_CRYPTO_AUTH_NULL,
 106                 .digest_len = 0,
 107                 .key_len = 0,
 108                 .key_not_req = 1
 109         },
 110         {
 111                 .keyword = "sha1-hmac",
 112                 .algo = RTE_CRYPTO_AUTH_SHA1_HMAC,
 113                 .digest_len = 12,
 114                 .key_len = 20
 115         },
 116         {
 117                 .keyword = "sha256-hmac",
 118                 .algo = RTE_CRYPTO_AUTH_SHA256_HMAC,
 119                 .digest_len = 16,
 120                 .key_len = 32
 121         }
 122 };
 123
 124 const struct supported_aead_algo aead_algos[] = {
 125         {
 126                 .keyword = "aes-128-gcm",
 127                 .algo = RTE_CRYPTO_AEAD_AES_GCM,
 128                 .iv_len = 8,
 129                 .block_size = 4,
 130                 .key_len = 20,
 131                 .digest_len = 16,
 132                 .aad_len = 8,
 133         }
 134 };
 135
 136 #define SA_INIT_NB      128
 137
 138 static struct ipsec_sa *sa_out;
 139 static uint32_t sa_out_sz;
 140 static uint32_t nb_sa_out;
 141 static struct ipsec_sa_cnt sa_out_cnt;
 142
 143 static struct ipsec_sa *sa_in;
 144 static uint32_t sa_in_sz;
 145 static uint32_t nb_sa_in;
 146 static struct ipsec_sa_cnt sa_in_cnt;
 147
 148 static const struct supported_cipher_algo *
 149 find_match_cipher_algo(const char *cipher_keyword)
 150 {
 151         size_t i;
 152
 153         for (i = 0; i < RTE_DIM(cipher_algos); i++) {
 154                 const struct supported_cipher_algo *algo =
 155                         &cipher_algos[i];
 156
 157                 if (strcmp(cipher_keyword, algo->keyword) == 0)
 158                         return algo;
 159         }
 160
 161         return NULL;
 162 }
 163
 164 static const struct supported_auth_algo *
 165 find_match_auth_algo(const char *auth_keyword)
 166 {
 167         size_t i;
 168
 169         for (i = 0; i < RTE_DIM(auth_algos); i++) {
 170                 const struct supported_auth_algo *algo =
 171                         &auth_algos[i];
 172
 173                 if (strcmp(auth_keyword, algo->keyword) == 0)
 174                         return algo;
 175         }
 176
 177         return NULL;
 178 }
 179
 180 static const struct supported_aead_algo *
 181 find_match_aead_algo(const char *aead_keyword)
 182 {
 183         size_t i;
 184
 185         for (i = 0; i < RTE_DIM(aead_algos); i++) {
 186                 const struct supported_aead_algo *algo =
 187                         &aead_algos[i];
 188
 189                 if (strcmp(aead_keyword, algo->keyword) == 0)
 190                         return algo;
 191         }
 192
 193         return NULL;
 194 }
 195
 196 /** parse_key_string
 197  *  parse x:x:x:x.... hex number key string into uint8_t *key
 198  *  return:
 199  *  > 0: number of bytes parsed
 200  *  0:   failed
 201  */
 202 static uint32_t
 203 parse_key_string(const char *key_str, uint8_t *key)
 204 {
 205         const char *pt_start = key_str, *pt_end = key_str;
 206         uint32_t nb_bytes = 0;
 207
 208         while (pt_end != NULL) {
 209                 char sub_str[3] = {0};
 210
 211                 pt_end = strchr(pt_start, ':');
 212
 213                 if (pt_end == NULL) {
 214                         if (strlen(pt_start) > 2)
 215                                 return 0;
 216                         strncpy(sub_str, pt_start, 2);
 217                 } else {
 218                         if (pt_end - pt_start > 2)
 219                                 return 0;
 220
 221                         strncpy(sub_str, pt_start, pt_end - pt_start);
 222                         pt_start = pt_end + 1;
 223                 }
 224
 225                 key[nb_bytes++] = strtol(sub_str, NULL, 16);
 226         }
 227
 228         return nb_bytes;
 229 }
 230
 231 static int
 232 extend_sa_arr(struct ipsec_sa **sa_tbl, uint32_t cur_cnt, uint32_t *cur_sz)
 233 {
 234         if (*sa_tbl == NULL) {
 235                 *sa_tbl = calloc(SA_INIT_NB, sizeof(struct ipsec_sa));
 236                 if (*sa_tbl == NULL)
 237                         return -1;
 238                 *cur_sz = SA_INIT_NB;
 239                 return 0;
 240         }
 241
 242         if (cur_cnt >= *cur_sz) {
 243                 *sa_tbl = realloc(*sa_tbl,
 244                         *cur_sz * sizeof(struct ipsec_sa) * 2);
 245                 if (*sa_tbl == NULL)
 246                         return -1;
 247                 /* clean reallocated extra space */
 248                 memset(&(*sa_tbl)[*cur_sz], 0,
 249                         *cur_sz * sizeof(struct ipsec_sa));
 250                 *cur_sz *= 2;
 251         }
 252
 253         return 0;
 254 }
 255
 256 void
 257 parse_sa_tokens(char **tokens, uint32_t n_tokens,
 258         struct parse_status *status)
 259 {
 260         struct ipsec_sa *rule = NULL;
 261         struct rte_ipsec_session *ips;
 262         uint32_t ti; /*token index*/
 263         uint32_t *ri /*rule index*/;
 264         struct ipsec_sa_cnt *sa_cnt;
 265         uint32_t cipher_algo_p = 0;
 266         uint32_t auth_algo_p = 0;
 267         uint32_t aead_algo_p = 0;
 268         uint32_t src_p = 0;
 269         uint32_t dst_p = 0;
 270         uint32_t mode_p = 0;
 271         uint32_t type_p = 0;
 272         uint32_t portid_p = 0;
 273         uint32_t fallback_p = 0;
 274
 275         if (strcmp(tokens[0], "in") == 0) {
 276                 ri = &nb_sa_in;
 277                 sa_cnt = &sa_in_cnt;
 278                 if (extend_sa_arr(&sa_in, nb_sa_in, &sa_in_sz) < 0)
 279                         return;
 280                 rule = &sa_in[*ri];
 281                 rule->direction = RTE_SECURITY_IPSEC_SA_DIR_INGRESS;
 282         } else {
 283                 ri = &nb_sa_out;
 284                 sa_cnt = &sa_out_cnt;
 285                 if (extend_sa_arr(&sa_out, nb_sa_out, &sa_out_sz) < 0)
 286                         return;
 287                 rule = &sa_out[*ri];
 288                 rule->direction = RTE_SECURITY_IPSEC_SA_DIR_EGRESS;
 289         }
 290
 291         /* spi number */
 292         APP_CHECK_TOKEN_IS_NUM(tokens, 1, status);
 293         if (status->status < 0)
 294                 return;
 295         if (atoi(tokens[1]) == INVALID_SPI)
 296                 return;
 297         rule->spi = atoi(tokens[1]);
 298         ips = ipsec_get_primary_session(rule);
 299
 300         for (ti = 2; ti < n_tokens; ti++) {
 301                 if (strcmp(tokens[ti], "mode") == 0) {
 302                         APP_CHECK_PRESENCE(mode_p, tokens[ti], status);
 303                         if (status->status < 0)
 304                                 return;
 305
 306                         INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
 307                         if (status->status < 0)
 308                                 return;
 309
 310                         if (strcmp(tokens[ti], "ipv4-tunnel") == 0) {
 311                                 sa_cnt->nb_v4++;
 312                                 rule->flags = IP4_TUNNEL;
 313                         } else if (strcmp(tokens[ti], "ipv6-tunnel") == 0) {
 314                                 sa_cnt->nb_v6++;
 315                                 rule->flags = IP6_TUNNEL;
 316                         } else if (strcmp(tokens[ti], "transport") == 0) {
 317                                 sa_cnt->nb_v4++;
 318                                 sa_cnt->nb_v6++;
 319                                 rule->flags = TRANSPORT;
 320                         } else {
 321                                 APP_CHECK(0, status, "unrecognized "
 322                                         "input \"%s\"", tokens[ti]);
 323                                 return;
 324                         }
 325
 326                         mode_p = 1;
 327                         continue;
 328                 }
 329
 330                 if (strcmp(tokens[ti], "cipher_algo") == 0) {
 331                         const struct supported_cipher_algo *algo;
 332                         uint32_t key_len;
 333
 334                         APP_CHECK_PRESENCE(cipher_algo_p, tokens[ti],
 335                                 status);
 336                         if (status->status < 0)
 337                                 return;
 338
 339                         INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
 340                         if (status->status < 0)
 341                                 return;
 342
 343                         algo = find_match_cipher_algo(tokens[ti]);
 344
 345                         APP_CHECK(algo != NULL, status, "unrecognized "
 346                                 "input \"%s\"", tokens[ti]);
 347
 348                         if (status->status < 0)
 349                                 return;
 350
 351                         rule->cipher_algo = algo->algo;
 352                         rule->block_size = algo->block_size;
 353                         rule->iv_len = algo->iv_len;
 354                         rule->cipher_key_len = algo->key_len;
 355
 356                         /* for NULL algorithm, no cipher key required */
 357                         if (rule->cipher_algo == RTE_CRYPTO_CIPHER_NULL) {
 358                                 cipher_algo_p = 1;
 359                                 continue;
 360                         }
 361
 362                         INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
 363                         if (status->status < 0)
 364                                 return;
 365
 366                         APP_CHECK(strcmp(tokens[ti], "cipher_key") == 0,
 367                                 status, "unrecognized input \"%s\", "
 368                                 "expect \"cipher_key\"", tokens[ti]);
 369                         if (status->status < 0)
 370                                 return;
 371
 372                         INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
 373                         if (status->status < 0)
 374                                 return;
 375
 376                         key_len = parse_key_string(tokens[ti],
 377                                 rule->cipher_key);
 378                         APP_CHECK(key_len == rule->cipher_key_len, status,
 379                                 "unrecognized input \"%s\"", tokens[ti]);
 380                         if (status->status < 0)
 381                                 return;
 382
 383                         if (algo->algo == RTE_CRYPTO_CIPHER_AES_CBC ||
 384                                 algo->algo == RTE_CRYPTO_CIPHER_3DES_CBC)
 385                                 rule->salt = (uint32_t)rte_rand();
 386
 387                         if (algo->algo == RTE_CRYPTO_CIPHER_AES_CTR) {
 388                                 key_len -= 4;
 389                                 rule->cipher_key_len = key_len;
 390                                 memcpy(&rule->salt,
 391                                         &rule->cipher_key[key_len], 4);
 392                         }
 393
 394                         cipher_algo_p = 1;
 395                         continue;
 396                 }
 397
 398                 if (strcmp(tokens[ti], "auth_algo") == 0) {
 399                         const struct supported_auth_algo *algo;
 400                         uint32_t key_len;
 401
 402                         APP_CHECK_PRESENCE(auth_algo_p, tokens[ti],
 403                                 status);
 404                         if (status->status < 0)
 405                                 return;
 406
 407                         INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
 408                         if (status->status < 0)
 409                                 return;
 410
 411                         algo = find_match_auth_algo(tokens[ti]);
 412                         APP_CHECK(algo != NULL, status, "unrecognized "
 413                                 "input \"%s\"", tokens[ti]);
 414
 415                         if (status->status < 0)
 416                                 return;
 417
 418                         rule->auth_algo = algo->algo;
 419                         rule->auth_key_len = algo->key_len;
 420                         rule->digest_len = algo->digest_len;
 421
 422                         /* NULL algorithm and combined algos do not
 423                          * require auth key
 424                          */
 425                         if (algo->key_not_req) {
 426                                 auth_algo_p = 1;
 427                                 continue;
 428                         }
 429
 430                         INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
 431                         if (status->status < 0)
 432                                 return;
 433
 434                         APP_CHECK(strcmp(tokens[ti], "auth_key") == 0,
 435                                 status, "unrecognized input \"%s\", "
 436                                 "expect \"auth_key\"", tokens[ti]);
 437                         if (status->status < 0)
 438                                 return;
 439
 440                         INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
 441                         if (status->status < 0)
 442                                 return;
 443
 444                         key_len = parse_key_string(tokens[ti],
 445                                 rule->auth_key);
 446                         APP_CHECK(key_len == rule->auth_key_len, status,
 447                                 "unrecognized input \"%s\"", tokens[ti]);
 448                         if (status->status < 0)
 449                                 return;
 450
 451                         auth_algo_p = 1;
 452                         continue;
 453                 }
 454
 455                 if (strcmp(tokens[ti], "aead_algo") == 0) {
 456                         const struct supported_aead_algo *algo;
 457                         uint32_t key_len;
 458
 459                         APP_CHECK_PRESENCE(aead_algo_p, tokens[ti],
 460                                 status);
 461                         if (status->status < 0)
 462                                 return;
 463
 464                         INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
 465                         if (status->status < 0)
 466                                 return;
 467
 468                         algo = find_match_aead_algo(tokens[ti]);
 469
 470                         APP_CHECK(algo != NULL, status, "unrecognized "
 471                                 "input \"%s\"", tokens[ti]);
 472
 473                         if (status->status < 0)
 474                                 return;
 475
 476                         rule->aead_algo = algo->algo;
 477                         rule->cipher_key_len = algo->key_len;
 478                         rule->digest_len = algo->digest_len;
 479                         rule->aad_len = algo->aad_len;
 480                         rule->block_size = algo->block_size;
 481                         rule->iv_len = algo->iv_len;
 482
 483                         INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
 484                         if (status->status < 0)
 485                                 return;
 486
 487                         APP_CHECK(strcmp(tokens[ti], "aead_key") == 0,
 488                                 status, "unrecognized input \"%s\", "
 489                                 "expect \"aead_key\"", tokens[ti]);
 490                         if (status->status < 0)
 491                                 return;
 492
 493                         INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
 494                         if (status->status < 0)
 495                                 return;
 496
 497                         key_len = parse_key_string(tokens[ti],
 498                                 rule->cipher_key);
 499                         APP_CHECK(key_len == rule->cipher_key_len, status,
 500                                 "unrecognized input \"%s\"", tokens[ti]);
 501                         if (status->status < 0)
 502                                 return;
 503
 504                         key_len -= 4;
 505                         rule->cipher_key_len = key_len;
 506                         memcpy(&rule->salt,
 507                                 &rule->cipher_key[key_len], 4);
 508
 509                         aead_algo_p = 1;
 510                         continue;
 511                 }
 512
 513                 if (strcmp(tokens[ti], "src") == 0) {
 514                         APP_CHECK_PRESENCE(src_p, tokens[ti], status);
 515                         if (status->status < 0)
 516                                 return;
 517
 518                         INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
 519                         if (status->status < 0)
 520                                 return;
 521
 522                         if (IS_IP4_TUNNEL(rule->flags)) {
 523                                 struct in_addr ip;
 524
 525                                 APP_CHECK(parse_ipv4_addr(tokens[ti],
 526                                         &ip, NULL) == 0, status,
 527                                         "unrecognized input \"%s\", "
 528                                         "expect valid ipv4 addr",
 529                                         tokens[ti]);
 530                                 if (status->status < 0)
 531                                         return;
 532                                 rule->src.ip.ip4 = rte_bswap32(
 533                                         (uint32_t)ip.s_addr);
 534                         } else if (IS_IP6_TUNNEL(rule->flags)) {
 535                                 struct in6_addr ip;
 536
 537                                 APP_CHECK(parse_ipv6_addr(tokens[ti], &ip,
 538                                         NULL) == 0, status,
 539                                         "unrecognized input \"%s\", "
 540                                         "expect valid ipv6 addr",
 541                                         tokens[ti]);
 542                                 if (status->status < 0)
 543                                         return;
 544                                 memcpy(rule->src.ip.ip6.ip6_b,
 545                                         ip.s6_addr, 16);
 546                         } else if (IS_TRANSPORT(rule->flags)) {
 547                                 APP_CHECK(0, status, "unrecognized input "
 548                                         "\"%s\"", tokens[ti]);
 549                                 return;
 550                         }
 551
 552                         src_p = 1;
 553                         continue;
 554                 }
 555
 556                 if (strcmp(tokens[ti], "dst") == 0) {
 557                         APP_CHECK_PRESENCE(dst_p, tokens[ti], status);
 558                         if (status->status < 0)
 559                                 return;
 560
 561                         INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
 562                         if (status->status < 0)
 563                                 return;
 564
 565                         if (IS_IP4_TUNNEL(rule->flags)) {
 566                                 struct in_addr ip;
 567
 568                                 APP_CHECK(parse_ipv4_addr(tokens[ti],
 569                                         &ip, NULL) == 0, status,
 570                                         "unrecognized input \"%s\", "
 571                                         "expect valid ipv4 addr",
 572                                         tokens[ti]);
 573                                 if (status->status < 0)
 574                                         return;
 575                                 rule->dst.ip.ip4 = rte_bswap32(
 576                                         (uint32_t)ip.s_addr);
 577                         } else if (IS_IP6_TUNNEL(rule->flags)) {
 578                                 struct in6_addr ip;
 579
 580                                 APP_CHECK(parse_ipv6_addr(tokens[ti], &ip,
 581                                         NULL) == 0, status,
 582                                         "unrecognized input \"%s\", "
 583                                         "expect valid ipv6 addr",
 584                                         tokens[ti]);
 585                                 if (status->status < 0)
 586                                         return;
 587                                 memcpy(rule->dst.ip.ip6.ip6_b, ip.s6_addr, 16);
 588                         } else if (IS_TRANSPORT(rule->flags)) {
 589                                 APP_CHECK(0, status, "unrecognized "
 590                                         "input \"%s\"", tokens[ti]);
 591                                 return;
 592                         }
 593
 594                         dst_p = 1;
 595                         continue;
 596                 }
 597
 598                 if (strcmp(tokens[ti], "type") == 0) {
 599                         APP_CHECK_PRESENCE(type_p, tokens[ti], status);
 600                         if (status->status < 0)
 601                                 return;
 602
 603                         INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
 604                         if (status->status < 0)
 605                                 return;
 606
 607                         if (strcmp(tokens[ti], "inline-crypto-offload") == 0)
 608                                 ips->type =
 609                                         RTE_SECURITY_ACTION_TYPE_INLINE_CRYPTO;
 610                         else if (strcmp(tokens[ti],
 611                                         "inline-protocol-offload") == 0)
 612                                 ips->type =
 613                                 RTE_SECURITY_ACTION_TYPE_INLINE_PROTOCOL;
 614                         else if (strcmp(tokens[ti],
 615                                         "lookaside-protocol-offload") == 0)
 616                                 ips->type =
 617                                 RTE_SECURITY_ACTION_TYPE_LOOKASIDE_PROTOCOL;
 618                         else if (strcmp(tokens[ti], "no-offload") == 0)
 619                                 ips->type = RTE_SECURITY_ACTION_TYPE_NONE;
 620                         else if (strcmp(tokens[ti], "cpu-crypto") == 0)
 621                                 ips->type = RTE_SECURITY_ACTION_TYPE_CPU_CRYPTO;
 622                         else {
 623                                 APP_CHECK(0, status, "Invalid input \"%s\"",
 624                                                 tokens[ti]);
 625                                 return;
 626                         }
 627
 628                         type_p = 1;
 629                         continue;
 630                 }
 631
 632                 if (strcmp(tokens[ti], "port_id") == 0) {
 633                         APP_CHECK_PRESENCE(portid_p, tokens[ti], status);
 634                         if (status->status < 0)
 635                                 return;
 636                         INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
 637                         if (status->status < 0)
 638                                 return;
 639                         rule->portid = atoi(tokens[ti]);
 640                         if (status->status < 0)
 641                                 return;
 642                         portid_p = 1;
 643                         continue;
 644                 }
 645
 646                 if (strcmp(tokens[ti], "fallback") == 0) {
 647                         struct rte_ipsec_session *fb;
 648
 649                         APP_CHECK(app_sa_prm.enable, status, "Fallback session "
 650                                 "not allowed for legacy mode.");
 651                         if (status->status < 0)
 652                                 return;
 653                         APP_CHECK(ips->type ==
 654                                 RTE_SECURITY_ACTION_TYPE_INLINE_CRYPTO, status,
 655                                 "Fallback session allowed if primary session "
 656                                 "is of type inline-crypto-offload only.");
 657                         if (status->status < 0)
 658                                 return;
 659                         APP_CHECK(rule->direction ==
 660                                 RTE_SECURITY_IPSEC_SA_DIR_INGRESS, status,
 661                                 "Fallback session not allowed for egress "
 662                                 "rule");
 663                         if (status->status < 0)
 664                                 return;
 665                         APP_CHECK_PRESENCE(fallback_p, tokens[ti], status);
 666                         if (status->status < 0)
 667                                 return;
 668                         INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
 669                         if (status->status < 0)
 670                                 return;
 671                         fb = ipsec_get_fallback_session(rule);
 672                         if (strcmp(tokens[ti], "lookaside-none") == 0) {
 673                                 fb->type = RTE_SECURITY_ACTION_TYPE_NONE;
 674                         } else {
 675                                 APP_CHECK(0, status, "unrecognized fallback "
 676                                         "type %s.", tokens[ti]);
 677                                 return;
 678                         }
 679
 680                         rule->fallback_sessions = 1;
 681                         fallback_p = 1;
 682                         continue;
 683                 }
 684
 685                 /* unrecognizeable input */
 686                 APP_CHECK(0, status, "unrecognized input \"%s\"",
 687                         tokens[ti]);
 688                 return;
 689         }
 690
 691         if (aead_algo_p) {
 692                 APP_CHECK(cipher_algo_p == 0, status,
 693                                 "AEAD used, no need for cipher options");
 694                 if (status->status < 0)
 695                         return;
 696
 697                 APP_CHECK(auth_algo_p == 0, status,
 698                                 "AEAD used, no need for auth options");
 699                 if (status->status < 0)
 700                         return;
 701         } else {
 702                 APP_CHECK(cipher_algo_p == 1, status, "missing cipher or AEAD options");
 703                 if (status->status < 0)
 704                         return;
 705
 706                 APP_CHECK(auth_algo_p == 1, status, "missing auth or AEAD options");
 707                 if (status->status < 0)
 708                         return;
 709         }
 710
 711         APP_CHECK(mode_p == 1, status, "missing mode option");
 712         if (status->status < 0)
 713                 return;
 714
 715         if ((ips->type != RTE_SECURITY_ACTION_TYPE_NONE && ips->type !=
 716                         RTE_SECURITY_ACTION_TYPE_CPU_CRYPTO) && (portid_p == 0))
 717                 printf("Missing portid option, falling back to non-offload\n");
 718
 719         if (!type_p || (!portid_p && ips->type !=
 720                         RTE_SECURITY_ACTION_TYPE_CPU_CRYPTO)) {
 721                 ips->type = RTE_SECURITY_ACTION_TYPE_NONE;
 722                 rule->portid = -1;
 723         }
 724
 725         *ri = *ri + 1;
 726 }
 727
 728 static void
 729 print_one_sa_rule(const struct ipsec_sa *sa, int inbound)
 730 {
 731         uint32_t i;
 732         uint8_t a, b, c, d;
 733         const struct rte_ipsec_session *ips;
 734         const struct rte_ipsec_session *fallback_ips;
 735
 736         printf("\tspi_%s(%3u):", inbound?"in":"out", sa->spi);
 737
 738         for (i = 0; i < RTE_DIM(cipher_algos); i++) {
 739                 if (cipher_algos[i].algo == sa->cipher_algo &&
 740                                 cipher_algos[i].key_len == sa->cipher_key_len) {
 741                         printf("%s ", cipher_algos[i].keyword);
 742                         break;
 743                 }
 744         }
 745
 746         for (i = 0; i < RTE_DIM(auth_algos); i++) {
 747                 if (auth_algos[i].algo == sa->auth_algo) {
 748                         printf("%s ", auth_algos[i].keyword);
 749                         break;
 750                 }
 751         }
 752
 753         for (i = 0; i < RTE_DIM(aead_algos); i++) {
 754                 if (aead_algos[i].algo == sa->aead_algo) {
 755                         printf("%s ", aead_algos[i].keyword);
 756                         break;
 757                 }
 758         }
 759
 760         printf("mode:");
 761
 762         switch (WITHOUT_TRANSPORT_VERSION(sa->flags)) {
 763         case IP4_TUNNEL:
 764                 printf("IP4Tunnel ");
 765                 uint32_t_to_char(sa->src.ip.ip4, &a, &b, &c, &d);
 766                 printf("%hhu.%hhu.%hhu.%hhu ", d, c, b, a);
 767                 uint32_t_to_char(sa->dst.ip.ip4, &a, &b, &c, &d);
 768                 printf("%hhu.%hhu.%hhu.%hhu", d, c, b, a);
 769                 break;
 770         case IP6_TUNNEL:
 771                 printf("IP6Tunnel ");
 772                 for (i = 0; i < 16; i++) {
 773                         if (i % 2 && i != 15)
 774                                 printf("%.2x:", sa->src.ip.ip6.ip6_b[i]);
 775                         else
 776                                 printf("%.2x", sa->src.ip.ip6.ip6_b[i]);
 777                 }
 778                 printf(" ");
 779                 for (i = 0; i < 16; i++) {
 780                         if (i % 2 && i != 15)
 781                                 printf("%.2x:", sa->dst.ip.ip6.ip6_b[i]);
 782                         else
 783                                 printf("%.2x", sa->dst.ip.ip6.ip6_b[i]);
 784                 }
 785                 break;
 786         case TRANSPORT:
 787                 printf("Transport ");
 788                 break;
 789         }
 790
 791         ips = &sa->sessions[IPSEC_SESSION_PRIMARY];
 792         printf(" type:");
 793         switch (ips->type) {
 794         case RTE_SECURITY_ACTION_TYPE_NONE:
 795                 printf("no-offload ");
 796                 break;
 797         case RTE_SECURITY_ACTION_TYPE_INLINE_CRYPTO:
 798                 printf("inline-crypto-offload ");
 799                 break;
 800         case RTE_SECURITY_ACTION_TYPE_INLINE_PROTOCOL:
 801                 printf("inline-protocol-offload ");
 802                 break;
 803         case RTE_SECURITY_ACTION_TYPE_LOOKASIDE_PROTOCOL:
 804                 printf("lookaside-protocol-offload ");
 805                 break;
 806         case RTE_SECURITY_ACTION_TYPE_CPU_CRYPTO:
 807                 printf("cpu-crypto-accelerated");
 808                 break;
 809         }
 810
 811         fallback_ips = &sa->sessions[IPSEC_SESSION_FALLBACK];
 812         if (fallback_ips != NULL && sa->fallback_sessions > 0) {
 813                 printf("inline fallback: ");
 814                 switch (fallback_ips->type) {
 815                 case RTE_SECURITY_ACTION_TYPE_NONE:
 816                         printf("lookaside-none");
 817                         break;
 818                 case RTE_SECURITY_ACTION_TYPE_CPU_CRYPTO:
 819                         printf("cpu-crypto-accelerated");
 820                         break;
 821                 default:
 822                         printf("invalid");
 823                         break;
 824                 }
 825         }
 826         printf("\n");
 827 }
 828
 829 struct ipsec_xf {
 830         struct rte_crypto_sym_xform a;
 831         struct rte_crypto_sym_xform b;
 832 };
 833
 834 struct sa_ctx {
 835         void *satbl; /* pointer to array of rte_ipsec_sa objects*/
 836         struct ipsec_sad sad;
 837         struct ipsec_xf *xf;
 838         uint32_t nb_sa;
 839         struct ipsec_sa sa[];
 840 };
 841
 842 static struct sa_ctx *
 843 sa_create(const char *name, int32_t socket_id, uint32_t nb_sa)
 844 {
 845         char s[PATH_MAX];
 846         struct sa_ctx *sa_ctx;
 847         uint32_t mz_size;
 848         const struct rte_memzone *mz;
 849
 850         snprintf(s, sizeof(s), "%s_%u", name, socket_id);
 851
 852         /* Create SA context */
 853         printf("Creating SA context with %u maximum entries on socket %d\n",
 854                         nb_sa, socket_id);
 855
 856         mz_size = sizeof(struct ipsec_xf) * nb_sa;
 857         mz = rte_memzone_reserve(s, mz_size, socket_id,
 858                         RTE_MEMZONE_1GB | RTE_MEMZONE_SIZE_HINT_ONLY);
 859         if (mz == NULL) {
 860                 printf("Failed to allocate SA XFORM memory\n");
 861                 rte_errno = ENOMEM;
 862                 return NULL;
 863         }
 864
 865         sa_ctx = rte_zmalloc(NULL, sizeof(struct sa_ctx) +
 866                 sizeof(struct ipsec_sa) * nb_sa, RTE_CACHE_LINE_SIZE);
 867
 868         if (sa_ctx == NULL) {
 869                 printf("Failed to allocate SA CTX memory\n");
 870                 rte_errno = ENOMEM;
 871                 rte_memzone_free(mz);
 872                 return NULL;
 873         }
 874
 875         sa_ctx->xf = (struct ipsec_xf *)mz->addr;
 876         sa_ctx->nb_sa = nb_sa;
 877
 878         return sa_ctx;
 879 }
 880
 881 static int
 882 check_eth_dev_caps(uint16_t portid, uint32_t inbound)
 883 {
 884         struct rte_eth_dev_info dev_info;
 885         int retval;
 886
 887         retval = rte_eth_dev_info_get(portid, &dev_info);
 888         if (retval != 0) {
 889                 RTE_LOG(ERR, IPSEC,
 890                         "Error during getting device (port %u) info: %s\n",
 891                         portid, strerror(-retval));
 892
 893                 return retval;
 894         }
 895
 896         if (inbound) {
 897                 if ((dev_info.rx_offload_capa &
 898                                 DEV_RX_OFFLOAD_SECURITY) == 0) {
 899                         RTE_LOG(WARNING, PORT,
 900                                 "hardware RX IPSec offload is not supported\n");
 901                         return -EINVAL;
 902                 }
 903
 904         } else { /* outbound */
 905                 if ((dev_info.tx_offload_capa &
 906                                 DEV_TX_OFFLOAD_SECURITY) == 0) {
 907                         RTE_LOG(WARNING, PORT,
 908                                 "hardware TX IPSec offload is not supported\n");
 909                         return -EINVAL;
 910                 }
 911         }
 912         return 0;
 913 }
 914
 915 /*
 916  * Helper function, tries to determine next_proto for SPI
 917  * by searching though SP rules.
 918  */
 919 static int
 920 get_spi_proto(uint32_t spi, enum rte_security_ipsec_sa_direction dir,
 921                 struct ip_addr ip_addr[2], uint32_t mask[2])
 922 {
 923         int32_t rc4, rc6;
 924
 925         rc4 = sp4_spi_present(spi, dir == RTE_SECURITY_IPSEC_SA_DIR_INGRESS,
 926                                 ip_addr, mask);
 927         rc6 = sp6_spi_present(spi, dir == RTE_SECURITY_IPSEC_SA_DIR_INGRESS,
 928                                 ip_addr, mask);
 929
 930         if (rc4 >= 0) {
 931                 if (rc6 >= 0) {
 932                         RTE_LOG(ERR, IPSEC,
 933                                 "%s: SPI %u used simultaeously by "
 934                                 "IPv4(%d) and IPv6 (%d) SP rules\n",
 935                                 __func__, spi, rc4, rc6);
 936                         return -EINVAL;
 937                 } else
 938                         return IPPROTO_IPIP;
 939         } else if (rc6 < 0) {
 940                 RTE_LOG(ERR, IPSEC,
 941                         "%s: SPI %u is not used by any SP rule\n",
 942                         __func__, spi);
 943                 return -EINVAL;
 944         } else
 945                 return IPPROTO_IPV6;
 946 }
 947
 948 /*
 949  * Helper function for getting source and destination IP addresses
 950  * from SP. Needed for inline crypto transport mode, as addresses are not
 951  * provided in config file for that mode. It checks if SP for current SA exists,
 952  * and based on what type of protocol is returned, it stores appropriate
 953  * addresses got from SP into SA.
 954  */
 955 static int
 956 sa_add_address_inline_crypto(struct ipsec_sa *sa)
 957 {
 958         int protocol;
 959         struct ip_addr ip_addr[2];
 960         uint32_t mask[2];
 961
 962         protocol = get_spi_proto(sa->spi, sa->direction, ip_addr, mask);
 963         if (protocol < 0)
 964                 return protocol;
 965         else if (protocol == IPPROTO_IPIP) {
 966                 sa->flags |= IP4_TRANSPORT;
 967                 if (mask[0] == IP4_FULL_MASK &&
 968                                 mask[1] == IP4_FULL_MASK &&
 969                                 ip_addr[0].ip.ip4 != 0 &&
 970                                 ip_addr[1].ip.ip4 != 0) {
 971
 972                         sa->src.ip.ip4 = ip_addr[0].ip.ip4;
 973                         sa->dst.ip.ip4 = ip_addr[1].ip.ip4;
 974                 } else {
 975                         RTE_LOG(ERR, IPSEC,
 976                         "%s: No valid address or mask entry in"
 977                         " IPv4 SP rule for SPI %u\n",
 978                         __func__, sa->spi);
 979                         return -EINVAL;
 980                 }
 981         } else if (protocol == IPPROTO_IPV6) {
 982                 sa->flags |= IP6_TRANSPORT;
 983                 if (mask[0] == IP6_FULL_MASK &&
 984                                 mask[1] == IP6_FULL_MASK &&
 985                                 (ip_addr[0].ip.ip6.ip6[0] != 0 ||
 986                                 ip_addr[0].ip.ip6.ip6[1] != 0) &&
 987                                 (ip_addr[1].ip.ip6.ip6[0] != 0 ||
 988                                 ip_addr[1].ip.ip6.ip6[1] != 0)) {
 989
 990                         sa->src.ip.ip6 = ip_addr[0].ip.ip6;
 991                         sa->dst.ip.ip6 = ip_addr[1].ip.ip6;
 992                 } else {
 993                         RTE_LOG(ERR, IPSEC,
 994                         "%s: No valid address or mask entry in"
 995                         " IPv6 SP rule for SPI %u\n",
 996                         __func__, sa->spi);
 997                         return -EINVAL;
 998                 }
 999         }
1000         return 0;
1001 }
1002
1003 static int
1004 sa_add_rules(struct sa_ctx *sa_ctx, const struct ipsec_sa entries[],
1005                 uint32_t nb_entries, uint32_t inbound,
1006                 struct socket_ctx *skt_ctx)
1007 {
1008         struct ipsec_sa *sa;
1009         uint32_t i, idx;
1010         uint16_t iv_length, aad_length;
1011         int inline_status;
1012         int32_t rc;
1013         struct rte_ipsec_session *ips;
1014
1015         /* for ESN upper 32 bits of SQN also need to be part of AAD */
1016         aad_length = (app_sa_prm.enable_esn != 0) ? sizeof(uint32_t) : 0;
1017
1018         for (i = 0; i < nb_entries; i++) {
1019                 idx = i;
1020                 sa = &sa_ctx->sa[idx];
1021                 if (sa->spi != 0) {
1022                         printf("Index %u already in use by SPI %u\n",
1023                                         idx, sa->spi);
1024                         return -EINVAL;
1025                 }
1026                 *sa = entries[i];
1027
1028                 if (inbound) {
1029                         rc = ipsec_sad_add(&sa_ctx->sad, sa);
1030                         if (rc != 0)
1031                                 return rc;
1032                 }
1033
1034                 sa->seq = 0;
1035                 ips = ipsec_get_primary_session(sa);
1036
1037                 if (ips->type == RTE_SECURITY_ACTION_TYPE_INLINE_PROTOCOL ||
1038                         ips->type == RTE_SECURITY_ACTION_TYPE_INLINE_CRYPTO) {
1039                         if (check_eth_dev_caps(sa->portid, inbound))
1040                                 return -EINVAL;
1041                 }
1042
1043                 switch (WITHOUT_TRANSPORT_VERSION(sa->flags)) {
1044                 case IP4_TUNNEL:
1045                         sa->src.ip.ip4 = rte_cpu_to_be_32(sa->src.ip.ip4);
1046                         sa->dst.ip.ip4 = rte_cpu_to_be_32(sa->dst.ip.ip4);
1047                         break;
1048                 case TRANSPORT:
1049                         if (ips->type ==
1050                                 RTE_SECURITY_ACTION_TYPE_INLINE_CRYPTO) {
1051                                 inline_status =
1052                                         sa_add_address_inline_crypto(sa);
1053                                 if (inline_status < 0)
1054                                         return inline_status;
1055                         }
1056                         break;
1057                 }
1058
1059                 if (sa->aead_algo == RTE_CRYPTO_AEAD_AES_GCM) {
1060                         struct rte_ipsec_session *ips;
1061                         iv_length = 12;
1062
1063                         sa_ctx->xf[idx].a.type = RTE_CRYPTO_SYM_XFORM_AEAD;
1064                         sa_ctx->xf[idx].a.aead.algo = sa->aead_algo;
1065                         sa_ctx->xf[idx].a.aead.key.data = sa->cipher_key;
1066                         sa_ctx->xf[idx].a.aead.key.length =
1067                                 sa->cipher_key_len;
1068                         sa_ctx->xf[idx].a.aead.op = (inbound == 1) ?
1069                                 RTE_CRYPTO_AEAD_OP_DECRYPT :
1070                                 RTE_CRYPTO_AEAD_OP_ENCRYPT;
1071                         sa_ctx->xf[idx].a.next = NULL;
1072                         sa_ctx->xf[idx].a.aead.iv.offset = IV_OFFSET;
1073                         sa_ctx->xf[idx].a.aead.iv.length = iv_length;
1074                         sa_ctx->xf[idx].a.aead.aad_length =
1075                                 sa->aad_len + aad_length;
1076                         sa_ctx->xf[idx].a.aead.digest_length =
1077                                 sa->digest_len;
1078
1079                         sa->xforms = &sa_ctx->xf[idx].a;
1080
1081                         ips = ipsec_get_primary_session(sa);
1082                         if (ips->type ==
1083                                 RTE_SECURITY_ACTION_TYPE_INLINE_PROTOCOL ||
1084                                 ips->type ==
1085                                 RTE_SECURITY_ACTION_TYPE_INLINE_CRYPTO) {
1086                                 rc = create_inline_session(skt_ctx, sa, ips);
1087                                 if (rc != 0) {
1088                                         RTE_LOG(ERR, IPSEC_ESP,
1089                                                 "create_inline_session() failed\n");
1090                                         return -EINVAL;
1091                                 }
1092                         }
1093                 } else {
1094                         switch (sa->cipher_algo) {
1095                         case RTE_CRYPTO_CIPHER_NULL:
1096                         case RTE_CRYPTO_CIPHER_3DES_CBC:
1097                         case RTE_CRYPTO_CIPHER_AES_CBC:
1098                                 iv_length = sa->iv_len;
1099                                 break;
1100                         case RTE_CRYPTO_CIPHER_AES_CTR:
1101                                 iv_length = 16;
1102                                 break;
1103                         default:
1104                                 RTE_LOG(ERR, IPSEC_ESP,
1105                                                 "unsupported cipher algorithm %u\n",
1106                                                 sa->cipher_algo);
1107                                 return -EINVAL;
1108                         }
1109
1110                         if (inbound) {
1111                                 sa_ctx->xf[idx].b.type = RTE_CRYPTO_SYM_XFORM_CIPHER;
1112                                 sa_ctx->xf[idx].b.cipher.algo = sa->cipher_algo;
1113                                 sa_ctx->xf[idx].b.cipher.key.data = sa->cipher_key;
1114                                 sa_ctx->xf[idx].b.cipher.key.length =
1115                                         sa->cipher_key_len;
1116                                 sa_ctx->xf[idx].b.cipher.op =
1117                                         RTE_CRYPTO_CIPHER_OP_DECRYPT;
1118                                 sa_ctx->xf[idx].b.next = NULL;
1119                                 sa_ctx->xf[idx].b.cipher.iv.offset = IV_OFFSET;
1120                                 sa_ctx->xf[idx].b.cipher.iv.length = iv_length;
1121
1122                                 sa_ctx->xf[idx].a.type = RTE_CRYPTO_SYM_XFORM_AUTH;
1123                                 sa_ctx->xf[idx].a.auth.algo = sa->auth_algo;
1124                                 sa_ctx->xf[idx].a.auth.key.data = sa->auth_key;
1125                                 sa_ctx->xf[idx].a.auth.key.length =
1126                                         sa->auth_key_len;
1127                                 sa_ctx->xf[idx].a.auth.digest_length =
1128                                         sa->digest_len;
1129                                 sa_ctx->xf[idx].a.auth.op =
1130                                         RTE_CRYPTO_AUTH_OP_VERIFY;
1131                         } else { /* outbound */
1132                                 sa_ctx->xf[idx].a.type = RTE_CRYPTO_SYM_XFORM_CIPHER;
1133                                 sa_ctx->xf[idx].a.cipher.algo = sa->cipher_algo;
1134                                 sa_ctx->xf[idx].a.cipher.key.data = sa->cipher_key;
1135                                 sa_ctx->xf[idx].a.cipher.key.length =
1136                                         sa->cipher_key_len;
1137                                 sa_ctx->xf[idx].a.cipher.op =
1138                                         RTE_CRYPTO_CIPHER_OP_ENCRYPT;
1139                                 sa_ctx->xf[idx].a.next = NULL;
1140                                 sa_ctx->xf[idx].a.cipher.iv.offset = IV_OFFSET;
1141                                 sa_ctx->xf[idx].a.cipher.iv.length = iv_length;
1142
1143                                 sa_ctx->xf[idx].b.type = RTE_CRYPTO_SYM_XFORM_AUTH;
1144                                 sa_ctx->xf[idx].b.auth.algo = sa->auth_algo;
1145                                 sa_ctx->xf[idx].b.auth.key.data = sa->auth_key;
1146                                 sa_ctx->xf[idx].b.auth.key.length =
1147                                         sa->auth_key_len;
1148                                 sa_ctx->xf[idx].b.auth.digest_length =
1149                                         sa->digest_len;
1150                                 sa_ctx->xf[idx].b.auth.op =
1151                                         RTE_CRYPTO_AUTH_OP_GENERATE;
1152                         }
1153
1154                         sa_ctx->xf[idx].a.next = &sa_ctx->xf[idx].b;
1155                         sa_ctx->xf[idx].b.next = NULL;
1156                         sa->xforms = &sa_ctx->xf[idx].a;
1157                 }
1158
1159                 print_one_sa_rule(sa, inbound);
1160         }
1161
1162         return 0;
1163 }
1164
1165 static inline int
1166 sa_out_add_rules(struct sa_ctx *sa_ctx, const struct ipsec_sa entries[],
1167                 uint32_t nb_entries, struct socket_ctx *skt_ctx)
1168 {
1169         return sa_add_rules(sa_ctx, entries, nb_entries, 0, skt_ctx);
1170 }
1171
1172 static inline int
1173 sa_in_add_rules(struct sa_ctx *sa_ctx, const struct ipsec_sa entries[],
1174                 uint32_t nb_entries, struct socket_ctx *skt_ctx)
1175 {
1176         return sa_add_rules(sa_ctx, entries, nb_entries, 1, skt_ctx);
1177 }
1178
1179 /*
1180  * helper function, fills parameters that are identical for all SAs
1181  */
1182 static void
1183 fill_ipsec_app_sa_prm(struct rte_ipsec_sa_prm *prm,
1184         const struct app_sa_prm *app_prm)
1185 {
1186         memset(prm, 0, sizeof(*prm));
1187
1188         prm->flags = app_prm->flags;
1189         prm->ipsec_xform.options.esn = app_prm->enable_esn;
1190         prm->ipsec_xform.replay_win_sz = app_prm->window_size;
1191 }
1192
1193 static int
1194 fill_ipsec_sa_prm(struct rte_ipsec_sa_prm *prm, const struct ipsec_sa *ss,
1195         const struct rte_ipv4_hdr *v4, struct rte_ipv6_hdr *v6)
1196 {
1197         int32_t rc;
1198
1199         /*
1200          * Try to get SPI next proto by searching that SPI in SPD.
1201          * probably not the optimal way, but there seems nothing
1202          * better right now.
1203          */
1204         rc = get_spi_proto(ss->spi, ss->direction, NULL, NULL);
1205         if (rc < 0)
1206                 return rc;
1207
1208         fill_ipsec_app_sa_prm(prm, &app_sa_prm);
1209         prm->userdata = (uintptr_t)ss;
1210
1211         /* setup ipsec xform */
1212         prm->ipsec_xform.spi = ss->spi;
1213         prm->ipsec_xform.salt = ss->salt;
1214         prm->ipsec_xform.direction = ss->direction;
1215         prm->ipsec_xform.proto = RTE_SECURITY_IPSEC_SA_PROTO_ESP;
1216         prm->ipsec_xform.mode = (IS_TRANSPORT(ss->flags)) ?
1217                 RTE_SECURITY_IPSEC_SA_MODE_TRANSPORT :
1218                 RTE_SECURITY_IPSEC_SA_MODE_TUNNEL;
1219         prm->ipsec_xform.options.ecn = 1;
1220         prm->ipsec_xform.options.copy_dscp = 1;
1221
1222         if (IS_IP4_TUNNEL(ss->flags)) {
1223                 prm->ipsec_xform.tunnel.type = RTE_SECURITY_IPSEC_TUNNEL_IPV4;
1224                 prm->tun.hdr_len = sizeof(*v4);
1225                 prm->tun.next_proto = rc;
1226                 prm->tun.hdr = v4;
1227         } else if (IS_IP6_TUNNEL(ss->flags)) {
1228                 prm->ipsec_xform.tunnel.type = RTE_SECURITY_IPSEC_TUNNEL_IPV6;
1229                 prm->tun.hdr_len = sizeof(*v6);
1230                 prm->tun.next_proto = rc;
1231                 prm->tun.hdr = v6;
1232         } else {
1233                 /* transport mode */
1234                 prm->trs.proto = rc;
1235         }
1236
1237         /* setup crypto section */
1238         prm->crypto_xform = ss->xforms;
1239         return 0;
1240 }
1241
1242 static int
1243 fill_ipsec_session(struct rte_ipsec_session *ss, struct rte_ipsec_sa *sa)
1244 {
1245         int32_t rc = 0;
1246
1247         ss->sa = sa;
1248
1249         if (ss->type == RTE_SECURITY_ACTION_TYPE_INLINE_CRYPTO ||
1250                 ss->type == RTE_SECURITY_ACTION_TYPE_INLINE_PROTOCOL) {
1251                 if (ss->security.ses != NULL) {
1252                         rc = rte_ipsec_session_prepare(ss);
1253                         if (rc != 0)
1254                                 memset(ss, 0, sizeof(*ss));
1255                 }
1256         }
1257
1258         return rc;
1259 }
1260
1261 /*
1262  * Initialise related rte_ipsec_sa object.
1263  */
1264 static int
1265 ipsec_sa_init(struct ipsec_sa *lsa, struct rte_ipsec_sa *sa, uint32_t sa_size)
1266 {
1267         int rc;
1268         struct rte_ipsec_sa_prm prm;
1269         struct rte_ipsec_session *ips;
1270         struct rte_ipv4_hdr v4  = {
1271                 .version_ihl = IPVERSION << 4 |
1272                         sizeof(v4) / RTE_IPV4_IHL_MULTIPLIER,
1273                 .time_to_live = IPDEFTTL,
1274                 .next_proto_id = IPPROTO_ESP,
1275                 .src_addr = lsa->src.ip.ip4,
1276                 .dst_addr = lsa->dst.ip.ip4,
1277         };
1278         struct rte_ipv6_hdr v6 = {
1279                 .vtc_flow = htonl(IP6_VERSION << 28),
1280                 .proto = IPPROTO_ESP,
1281         };
1282
1283         if (IS_IP6_TUNNEL(lsa->flags)) {
1284                 memcpy(v6.src_addr, lsa->src.ip.ip6.ip6_b, sizeof(v6.src_addr));
1285                 memcpy(v6.dst_addr, lsa->dst.ip.ip6.ip6_b, sizeof(v6.dst_addr));
1286         }
1287
1288         rc = fill_ipsec_sa_prm(&prm, lsa, &v4, &v6);
1289         if (rc == 0)
1290                 rc = rte_ipsec_sa_init(sa, &prm, sa_size);
1291         if (rc < 0)
1292                 return rc;
1293
1294         /* init primary processing session */
1295         ips = ipsec_get_primary_session(lsa);
1296         rc = fill_ipsec_session(ips, sa);
1297         if (rc != 0)
1298                 return rc;
1299
1300         /* init inline fallback processing session */
1301         if (lsa->fallback_sessions == 1)
1302                 rc = fill_ipsec_session(ipsec_get_fallback_session(lsa), sa);
1303
1304         return rc;
1305 }
1306
1307 /*
1308  * Allocate space and init rte_ipsec_sa strcutures,
1309  * one per session.
1310  */
1311 static int
1312 ipsec_satbl_init(struct sa_ctx *ctx, uint32_t nb_ent, int32_t socket)
1313 {
1314         int32_t rc, sz;
1315         uint32_t i, idx;
1316         size_t tsz;
1317         struct rte_ipsec_sa *sa;
1318         struct ipsec_sa *lsa;
1319         struct rte_ipsec_sa_prm prm;
1320
1321         /* determine SA size */
1322         idx = 0;
1323         fill_ipsec_sa_prm(&prm, ctx->sa + idx, NULL, NULL);
1324         sz = rte_ipsec_sa_size(&prm);
1325         if (sz < 0) {
1326                 RTE_LOG(ERR, IPSEC, "%s(%p, %u, %d): "
1327                         "failed to determine SA size, error code: %d\n",
1328                         __func__, ctx, nb_ent, socket, sz);
1329                 return sz;
1330         }
1331
1332         tsz = sz * nb_ent;
1333
1334         ctx->satbl = rte_zmalloc_socket(NULL, tsz, RTE_CACHE_LINE_SIZE, socket);
1335         if (ctx->satbl == NULL) {
1336                 RTE_LOG(ERR, IPSEC,
1337                         "%s(%p, %u, %d): failed to allocate %zu bytes\n",
1338                         __func__,  ctx, nb_ent, socket, tsz);
1339                 return -ENOMEM;
1340         }
1341
1342         rc = 0;
1343         for (i = 0; i != nb_ent && rc == 0; i++) {
1344
1345                 idx = i;
1346
1347                 sa = (struct rte_ipsec_sa *)((uintptr_t)ctx->satbl + sz * i);
1348                 lsa = ctx->sa + idx;
1349
1350                 rc = ipsec_sa_init(lsa, sa, sz);
1351         }
1352
1353         return rc;
1354 }
1355
1356 static int
1357 sa_cmp(const void *p, const void *q)
1358 {
1359         uint32_t spi1 = ((const struct ipsec_sa *)p)->spi;
1360         uint32_t spi2 = ((const struct ipsec_sa *)q)->spi;
1361
1362         return (int)(spi1 - spi2);
1363 }
1364
1365 /*
1366  * Walk through all SA rules to find an SA with given SPI
1367  */
1368 int
1369 sa_spi_present(struct sa_ctx *sa_ctx, uint32_t spi, int inbound)
1370 {
1371         uint32_t num;
1372         struct ipsec_sa *sa;
1373         struct ipsec_sa tmpl;
1374         const struct ipsec_sa *sar;
1375
1376         sar = sa_ctx->sa;
1377         if (inbound != 0)
1378                 num = nb_sa_in;
1379         else
1380                 num = nb_sa_out;
1381
1382         tmpl.spi = spi;
1383
1384         sa = bsearch(&tmpl, sar, num, sizeof(struct ipsec_sa), sa_cmp);
1385         if (sa != NULL)
1386                 return RTE_PTR_DIFF(sa, sar) / sizeof(struct ipsec_sa);
1387
1388         return -ENOENT;
1389 }
1390
1391 void
1392 sa_init(struct socket_ctx *ctx, int32_t socket_id)
1393 {
1394         int32_t rc;
1395         const char *name;
1396
1397         if (ctx == NULL)
1398                 rte_exit(EXIT_FAILURE, "NULL context.\n");
1399
1400         if (ctx->sa_in != NULL)
1401                 rte_exit(EXIT_FAILURE, "Inbound SA DB for socket %u already "
1402                                 "initialized\n", socket_id);
1403
1404         if (ctx->sa_out != NULL)
1405                 rte_exit(EXIT_FAILURE, "Outbound SA DB for socket %u already "
1406                                 "initialized\n", socket_id);
1407
1408         if (nb_sa_in > 0) {
1409                 name = "sa_in";
1410                 ctx->sa_in = sa_create(name, socket_id, nb_sa_in);
1411                 if (ctx->sa_in == NULL)
1412                         rte_exit(EXIT_FAILURE, "Error [%d] creating SA "
1413                                 "context %s in socket %d\n", rte_errno,
1414                                 name, socket_id);
1415
1416                 rc = ipsec_sad_create(name, &ctx->sa_in->sad, socket_id,
1417                                 &sa_in_cnt);
1418                 if (rc != 0)
1419                         rte_exit(EXIT_FAILURE, "failed to init SAD\n");
1420
1421                 sa_in_add_rules(ctx->sa_in, sa_in, nb_sa_in, ctx);
1422
1423                 if (app_sa_prm.enable != 0) {
1424                         rc = ipsec_satbl_init(ctx->sa_in, nb_sa_in,
1425                                 socket_id);
1426                         if (rc != 0)
1427                                 rte_exit(EXIT_FAILURE,
1428                                         "failed to init inbound SAs\n");
1429                 }
1430         } else
1431                 RTE_LOG(WARNING, IPSEC, "No SA Inbound rule specified\n");
1432
1433         if (nb_sa_out > 0) {
1434                 name = "sa_out";
1435                 ctx->sa_out = sa_create(name, socket_id, nb_sa_out);
1436                 if (ctx->sa_out == NULL)
1437                         rte_exit(EXIT_FAILURE, "Error [%d] creating SA "
1438                                 "context %s in socket %d\n", rte_errno,
1439                                 name, socket_id);
1440
1441                 sa_out_add_rules(ctx->sa_out, sa_out, nb_sa_out, ctx);
1442
1443                 if (app_sa_prm.enable != 0) {
1444                         rc = ipsec_satbl_init(ctx->sa_out, nb_sa_out,
1445                                 socket_id);
1446                         if (rc != 0)
1447                                 rte_exit(EXIT_FAILURE,
1448                                         "failed to init outbound SAs\n");
1449                 }
1450         } else
1451                 RTE_LOG(WARNING, IPSEC, "No SA Outbound rule "
1452                         "specified\n");
1453 }
1454
1455 int
1456 inbound_sa_check(struct sa_ctx *sa_ctx, struct rte_mbuf *m, uint32_t sa_idx)
1457 {
1458         struct ipsec_mbuf_metadata *priv;
1459         struct ipsec_sa *sa;
1460
1461         priv = get_priv(m);
1462         sa = priv->sa;
1463         if (sa != NULL)
1464                 return (sa_ctx->sa[sa_idx].spi == sa->spi);
1465
1466         RTE_LOG(ERR, IPSEC, "SA not saved in private data\n");
1467         return 0;
1468 }
1469
1470 void
1471 inbound_sa_lookup(struct sa_ctx *sa_ctx, struct rte_mbuf *pkts[],
1472                 void *sa_arr[], uint16_t nb_pkts)
1473 {
1474         uint32_t i;
1475         void *result_sa;
1476         struct ipsec_sa *sa;
1477
1478         sad_lookup(&sa_ctx->sad, pkts, sa_arr, nb_pkts);
1479
1480         /*
1481          * Mark need for inline offload fallback on the LSB of SA pointer.
1482          * Thanks to packet grouping mechanism which ipsec_process is using
1483          * packets marked for fallback processing will form separate group.
1484          *
1485          * Because it is not safe to use SA pointer it is casted to generic
1486          * pointer to prevent from unintentional use. Use ipsec_mask_saptr
1487          * to get valid struct pointer.
1488          */
1489         for (i = 0; i < nb_pkts; i++) {
1490                 if (sa_arr[i] == NULL)
1491                         continue;
1492
1493                 result_sa = sa = sa_arr[i];
1494                 if (MBUF_NO_SEC_OFFLOAD(pkts[i]) &&
1495                         sa->fallback_sessions > 0) {
1496                         uintptr_t intsa = (uintptr_t)sa;
1497                         intsa |= IPSEC_SA_OFFLOAD_FALLBACK_FLAG;
1498                         result_sa = (void *)intsa;
1499                 }
1500                 sa_arr[i] = result_sa;
1501         }
1502 }
1503
1504 void
1505 outbound_sa_lookup(struct sa_ctx *sa_ctx, uint32_t sa_idx[],
1506                 void *sa[], uint16_t nb_pkts)
1507 {
1508         uint32_t i;
1509
1510         for (i = 0; i < nb_pkts; i++)
1511                 sa[i] = &sa_ctx->sa[sa_idx[i]];
1512 }
1513
1514 /*
1515  * Select HW offloads to be used.
1516  */
1517 int
1518 sa_check_offloads(uint16_t port_id, uint64_t *rx_offloads,
1519                 uint64_t *tx_offloads)
1520 {
1521         struct ipsec_sa *rule;
1522         uint32_t idx_sa;
1523         enum rte_security_session_action_type rule_type;
1524
1525         *rx_offloads = 0;
1526         *tx_offloads = 0;
1527
1528         /* Check for inbound rules that use offloads and use this port */
1529         for (idx_sa = 0; idx_sa < nb_sa_in; idx_sa++) {
1530                 rule = &sa_in[idx_sa];
1531                 rule_type = ipsec_get_action_type(rule);
1532                 if ((rule_type == RTE_SECURITY_ACTION_TYPE_INLINE_CRYPTO ||
1533                                 rule_type ==
1534                                 RTE_SECURITY_ACTION_TYPE_INLINE_PROTOCOL)
1535                                 && rule->portid == port_id)
1536                         *rx_offloads |= DEV_RX_OFFLOAD_SECURITY;
1537         }
1538
1539         /* Check for outbound rules that use offloads and use this port */
1540         for (idx_sa = 0; idx_sa < nb_sa_out; idx_sa++) {
1541                 rule = &sa_out[idx_sa];
1542                 rule_type = ipsec_get_action_type(rule);
1543                 if ((rule_type == RTE_SECURITY_ACTION_TYPE_INLINE_CRYPTO ||
1544                                 rule_type ==
1545                                 RTE_SECURITY_ACTION_TYPE_INLINE_PROTOCOL)
1546                                 && rule->portid == port_id)
1547                         *tx_offloads |= DEV_TX_OFFLOAD_SECURITY;
1548         }
1549         return 0;
1550 }
1551
1552 void
1553 sa_sort_arr(void)
1554 {
1555         qsort(sa_in, nb_sa_in, sizeof(struct ipsec_sa), sa_cmp);
1556         qsort(sa_out, nb_sa_out, sizeof(struct ipsec_sa), sa_cmp);
1557 }