src/vnet/ipsec/ipsec.c

   1 /*
   2  * ipsec.c : IPSEC module functions
   3  *
   4  * Copyright (c) 2015 Cisco and/or its affiliates.
   5  * Licensed under the Apache License, Version 2.0 (the "License");
   6  * you may not use this file except in compliance with the License.
   7  * You may obtain a copy of the License at:
   8  *
   9  *     http://www.apache.org/licenses/LICENSE-2.0
  10  *
  11  * Unless required by applicable law or agreed to in writing, software
  12  * distributed under the License is distributed on an "AS IS" BASIS,
  13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14  * See the License for the specific language governing permissions and
  15  * limitations under the License.
  16  */
  17
  18 #include <vnet/vnet.h>
  19 #include <vnet/api_errno.h>
  20 #include <vnet/ip/ip.h>
  21 #include <vnet/interface.h>
  22 #include <vnet/udp/udp_local.h>
  23
  24 #include <vnet/ipsec/ipsec.h>
  25 #include <vnet/ipsec/esp.h>
  26 #include <vnet/ipsec/ah.h>
  27 #include <vnet/ipsec/ipsec_tun.h>
  28
  29 ipsec_main_t ipsec_main;
  30 esp_async_post_next_t esp_encrypt_async_next;
  31 esp_async_post_next_t esp_decrypt_async_next;
  32
  33 static clib_error_t *
  34 ipsec_check_ah_support (ipsec_sa_t * sa)
  35 {
  36   ipsec_main_t *im = &ipsec_main;
  37
  38   if (sa->integ_alg == IPSEC_INTEG_ALG_NONE)
  39     return clib_error_return (0, "unsupported none integ-alg");
  40
  41   if (!vnet_crypto_is_set_handler (im->integ_algs[sa->integ_alg].alg))
  42     return clib_error_return (0, "No crypto engine support for %U",
  43                               format_ipsec_integ_alg, sa->integ_alg);
  44
  45   return 0;
  46 }
  47
  48 static clib_error_t *
  49 ipsec_check_esp_support (ipsec_sa_t * sa)
  50 {
  51   ipsec_main_t *im = &ipsec_main;
  52
  53   if (IPSEC_INTEG_ALG_NONE != sa->integ_alg)
  54     {
  55       if (!vnet_crypto_is_set_handler (im->integ_algs[sa->integ_alg].alg))
  56         return clib_error_return (0, "No crypto engine support for %U",
  57                                   format_ipsec_integ_alg, sa->integ_alg);
  58     }
  59   if (IPSEC_CRYPTO_ALG_NONE != sa->crypto_alg)
  60     {
  61       if (!vnet_crypto_is_set_handler (im->crypto_algs[sa->crypto_alg].alg))
  62         return clib_error_return (0, "No crypto engine support for %U",
  63                                   format_ipsec_crypto_alg, sa->crypto_alg);
  64     }
  65
  66   return (0);
  67 }
  68
  69 clib_error_t *
  70 ipsec_add_del_sa_sess_cb (ipsec_main_t * im, u32 sa_index, u8 is_add)
  71 {
  72   ipsec_ah_backend_t *ah =
  73     pool_elt_at_index (im->ah_backends, im->ah_current_backend);
  74   if (ah->add_del_sa_sess_cb)
  75     {
  76       clib_error_t *err = ah->add_del_sa_sess_cb (sa_index, is_add);
  77       if (err)
  78         return err;
  79     }
  80   ipsec_esp_backend_t *esp =
  81     pool_elt_at_index (im->esp_backends, im->esp_current_backend);
  82   if (esp->add_del_sa_sess_cb)
  83     {
  84       clib_error_t *err = esp->add_del_sa_sess_cb (sa_index, is_add);
  85       if (err)
  86         return err;
  87     }
  88   return 0;
  89 }
  90
  91 clib_error_t *
  92 ipsec_check_support_cb (ipsec_main_t * im, ipsec_sa_t * sa)
  93 {
  94   clib_error_t *error = 0;
  95
  96   if (PREDICT_FALSE (sa->protocol == IPSEC_PROTOCOL_AH))
  97     {
  98       ipsec_ah_backend_t *ah =
  99         pool_elt_at_index (im->ah_backends, im->ah_current_backend);
 100       ASSERT (ah->check_support_cb);
 101       error = ah->check_support_cb (sa);
 102     }
 103   else
 104     {
 105       ipsec_esp_backend_t *esp =
 106         pool_elt_at_index (im->esp_backends, im->esp_current_backend);
 107       ASSERT (esp->check_support_cb);
 108       error = esp->check_support_cb (sa);
 109     }
 110   return error;
 111 }
 112
 113
 114 static void
 115 ipsec_add_node (vlib_main_t * vm, const char *node_name,
 116                 const char *prev_node_name, u32 * out_node_index,
 117                 u32 * out_next_index)
 118 {
 119   vlib_node_t *prev_node, *node;
 120   prev_node = vlib_get_node_by_name (vm, (u8 *) prev_node_name);
 121   ASSERT (prev_node);
 122   node = vlib_get_node_by_name (vm, (u8 *) node_name);
 123   ASSERT (node);
 124   *out_node_index = node->index;
 125   *out_next_index = vlib_node_add_next (vm, prev_node->index, node->index);
 126 }
 127
 128 void
 129 ipsec_unregister_udp_port (u16 port)
 130 {
 131   ipsec_main_t *im = &ipsec_main;
 132   u32 n_regs;
 133   uword *p;
 134
 135   p = hash_get (im->udp_port_registrations, port);
 136
 137   ASSERT (p);
 138
 139   n_regs = p[0];
 140
 141   if (0 == --n_regs)
 142     {
 143       udp_unregister_dst_port (vlib_get_main (), port, 1);
 144       hash_unset (im->udp_port_registrations, port);
 145     }
 146   else
 147     {
 148       hash_unset (im->udp_port_registrations, port);
 149       hash_set (im->udp_port_registrations, port, n_regs);
 150     }
 151 }
 152
 153 void
 154 ipsec_register_udp_port (u16 port)
 155 {
 156   ipsec_main_t *im = &ipsec_main;
 157   u32 n_regs;
 158   uword *p;
 159
 160   p = hash_get (im->udp_port_registrations, port);
 161
 162   n_regs = (p ? p[0] : 0);
 163
 164   if (0 == n_regs++)
 165     udp_register_dst_port (vlib_get_main (), port,
 166                            ipsec4_tun_input_node.index, 1);
 167
 168   hash_unset (im->udp_port_registrations, port);
 169   hash_set (im->udp_port_registrations, port, n_regs);
 170 }
 171
 172 u32
 173 ipsec_register_ah_backend (vlib_main_t * vm, ipsec_main_t * im,
 174                            const char *name,
 175                            const char *ah4_encrypt_node_name,
 176                            const char *ah4_decrypt_node_name,
 177                            const char *ah6_encrypt_node_name,
 178                            const char *ah6_decrypt_node_name,
 179                            check_support_cb_t ah_check_support_cb,
 180                            add_del_sa_sess_cb_t ah_add_del_sa_sess_cb)
 181 {
 182   ipsec_ah_backend_t *b;
 183   pool_get (im->ah_backends, b);
 184   b->name = format (0, "%s%c", name, 0);
 185
 186   ipsec_add_node (vm, ah4_encrypt_node_name, "ipsec4-output-feature",
 187                   &b->ah4_encrypt_node_index, &b->ah4_encrypt_next_index);
 188   ipsec_add_node (vm, ah4_decrypt_node_name, "ipsec4-input-feature",
 189                   &b->ah4_decrypt_node_index, &b->ah4_decrypt_next_index);
 190   ipsec_add_node (vm, ah6_encrypt_node_name, "ipsec6-output-feature",
 191                   &b->ah6_encrypt_node_index, &b->ah6_encrypt_next_index);
 192   ipsec_add_node (vm, ah6_decrypt_node_name, "ipsec6-input-feature",
 193                   &b->ah6_decrypt_node_index, &b->ah6_decrypt_next_index);
 194
 195   b->check_support_cb = ah_check_support_cb;
 196   b->add_del_sa_sess_cb = ah_add_del_sa_sess_cb;
 197   return b - im->ah_backends;
 198 }
 199
 200 u32
 201 ipsec_register_esp_backend (
 202   vlib_main_t *vm, ipsec_main_t *im, const char *name,
 203   const char *esp4_encrypt_node_name, const char *esp4_encrypt_node_tun_name,
 204   const char *esp4_decrypt_node_name, const char *esp4_decrypt_tun_node_name,
 205   const char *esp6_encrypt_node_name, const char *esp6_encrypt_node_tun_name,
 206   const char *esp6_decrypt_node_name, const char *esp6_decrypt_tun_node_name,
 207   const char *esp_mpls_encrypt_node_tun_name,
 208   check_support_cb_t esp_check_support_cb,
 209   add_del_sa_sess_cb_t esp_add_del_sa_sess_cb,
 210   enable_disable_cb_t enable_disable_cb)
 211 {
 212   ipsec_esp_backend_t *b;
 213
 214   pool_get (im->esp_backends, b);
 215   b->name = format (0, "%s%c", name, 0);
 216
 217   ipsec_add_node (vm, esp4_encrypt_node_name, "ipsec4-output-feature",
 218                   &b->esp4_encrypt_node_index, &b->esp4_encrypt_next_index);
 219   ipsec_add_node (vm, esp4_decrypt_node_name, "ipsec4-input-feature",
 220                   &b->esp4_decrypt_node_index, &b->esp4_decrypt_next_index);
 221   ipsec_add_node (vm, esp6_encrypt_node_name, "ipsec6-output-feature",
 222                   &b->esp6_encrypt_node_index, &b->esp6_encrypt_next_index);
 223   ipsec_add_node (vm, esp6_decrypt_node_name, "ipsec6-input-feature",
 224                   &b->esp6_decrypt_node_index, &b->esp6_decrypt_next_index);
 225   ipsec_add_node (vm, esp4_decrypt_tun_node_name, "ipsec4-tun-input",
 226                   &b->esp4_decrypt_tun_node_index,
 227                   &b->esp4_decrypt_tun_next_index);
 228   ipsec_add_node (vm, esp6_decrypt_tun_node_name, "ipsec6-tun-input",
 229                   &b->esp6_decrypt_tun_node_index,
 230                   &b->esp6_decrypt_tun_next_index);
 231
 232   b->esp6_encrypt_tun_node_index =
 233     vlib_get_node_by_name (vm, (u8 *) esp6_encrypt_node_tun_name)->index;
 234   b->esp_mpls_encrypt_tun_node_index =
 235     vlib_get_node_by_name (vm, (u8 *) esp_mpls_encrypt_node_tun_name)->index;
 236   b->esp4_encrypt_tun_node_index =
 237     vlib_get_node_by_name (vm, (u8 *) esp4_encrypt_node_tun_name)->index;
 238
 239   b->check_support_cb = esp_check_support_cb;
 240   b->add_del_sa_sess_cb = esp_add_del_sa_sess_cb;
 241   b->enable_disable_cb = enable_disable_cb;
 242
 243   return b - im->esp_backends;
 244 }
 245
 246 clib_error_t *
 247 ipsec_rsc_in_use (ipsec_main_t * im)
 248 {
 249   /* return an error is crypto resource are in use */
 250   if (pool_elts (ipsec_sa_pool) > 0)
 251     return clib_error_return (0, "%d SA entries configured",
 252                               pool_elts (ipsec_sa_pool));
 253
 254   return (NULL);
 255 }
 256
 257 int
 258 ipsec_select_ah_backend (ipsec_main_t * im, u32 backend_idx)
 259 {
 260   if (ipsec_rsc_in_use (im))
 261     return VNET_API_ERROR_RSRC_IN_USE;
 262
 263   if (pool_is_free_index (im->ah_backends, backend_idx))
 264     return VNET_API_ERROR_INVALID_VALUE;
 265
 266   ipsec_ah_backend_t *b = pool_elt_at_index (im->ah_backends, backend_idx);
 267   im->ah_current_backend = backend_idx;
 268   im->ah4_encrypt_node_index = b->ah4_encrypt_node_index;
 269   im->ah4_decrypt_node_index = b->ah4_decrypt_node_index;
 270   im->ah4_encrypt_next_index = b->ah4_encrypt_next_index;
 271   im->ah4_decrypt_next_index = b->ah4_decrypt_next_index;
 272   im->ah6_encrypt_node_index = b->ah6_encrypt_node_index;
 273   im->ah6_decrypt_node_index = b->ah6_decrypt_node_index;
 274   im->ah6_encrypt_next_index = b->ah6_encrypt_next_index;
 275   im->ah6_decrypt_next_index = b->ah6_decrypt_next_index;
 276
 277   return 0;
 278 }
 279
 280 int
 281 ipsec_select_esp_backend (ipsec_main_t * im, u32 backend_idx)
 282 {
 283   if (ipsec_rsc_in_use (im))
 284     return VNET_API_ERROR_RSRC_IN_USE;
 285
 286   if (pool_is_free_index (im->esp_backends, backend_idx))
 287     return VNET_API_ERROR_INVALID_VALUE;
 288
 289   /* disable current backend */
 290   if (im->esp_current_backend != ~0)
 291     {
 292       ipsec_esp_backend_t *cb = pool_elt_at_index (im->esp_backends,
 293                                                    im->esp_current_backend);
 294       if (cb->enable_disable_cb)
 295         {
 296           if ((cb->enable_disable_cb) (0) != 0)
 297             return -1;
 298         }
 299     }
 300
 301   ipsec_esp_backend_t *b = pool_elt_at_index (im->esp_backends, backend_idx);
 302   im->esp_current_backend = backend_idx;
 303   im->esp4_encrypt_node_index = b->esp4_encrypt_node_index;
 304   im->esp4_decrypt_node_index = b->esp4_decrypt_node_index;
 305   im->esp4_encrypt_next_index = b->esp4_encrypt_next_index;
 306   im->esp4_decrypt_next_index = b->esp4_decrypt_next_index;
 307   im->esp6_encrypt_node_index = b->esp6_encrypt_node_index;
 308   im->esp6_decrypt_node_index = b->esp6_decrypt_node_index;
 309   im->esp6_encrypt_next_index = b->esp6_encrypt_next_index;
 310   im->esp6_decrypt_next_index = b->esp6_decrypt_next_index;
 311   im->esp4_decrypt_tun_node_index = b->esp4_decrypt_tun_node_index;
 312   im->esp4_decrypt_tun_next_index = b->esp4_decrypt_tun_next_index;
 313   im->esp6_decrypt_tun_node_index = b->esp6_decrypt_tun_node_index;
 314   im->esp6_decrypt_tun_next_index = b->esp6_decrypt_tun_next_index;
 315   im->esp4_encrypt_tun_node_index = b->esp4_encrypt_tun_node_index;
 316   im->esp6_encrypt_tun_node_index = b->esp6_encrypt_tun_node_index;
 317   im->esp_mpls_encrypt_tun_node_index = b->esp_mpls_encrypt_tun_node_index;
 318
 319   if (b->enable_disable_cb)
 320     {
 321       if ((b->enable_disable_cb) (1) != 0)
 322         return -1;
 323     }
 324   return 0;
 325 }
 326
 327 void
 328 ipsec_set_async_mode (u32 is_enabled)
 329 {
 330   ipsec_main_t *im = &ipsec_main;
 331   ipsec_sa_t *sa;
 332
 333   vnet_crypto_request_async_mode (is_enabled);
 334
 335   im->async_mode = is_enabled;
 336
 337   /* change SA crypto op data */
 338   pool_foreach (sa, ipsec_sa_pool)
 339     {
 340       sa->crypto_op_data =
 341         (is_enabled ? sa->async_op_data.data : sa->sync_op_data.data);
 342     }
 343 }
 344
 345 static void
 346 crypto_engine_backend_register_post_node (vlib_main_t * vm)
 347 {
 348   esp_async_post_next_t *eit;
 349   esp_async_post_next_t *dit;
 350
 351   eit = &esp_encrypt_async_next;
 352   eit->esp4_post_next =
 353     vnet_crypto_register_post_node (vm, "esp4-encrypt-post");
 354   eit->esp6_post_next =
 355     vnet_crypto_register_post_node (vm, "esp6-encrypt-post");
 356   eit->esp4_tun_post_next =
 357     vnet_crypto_register_post_node (vm, "esp4-encrypt-tun-post");
 358   eit->esp6_tun_post_next =
 359     vnet_crypto_register_post_node (vm, "esp6-encrypt-tun-post");
 360   eit->esp_mpls_tun_post_next =
 361     vnet_crypto_register_post_node (vm, "esp-mpls-encrypt-tun-post");
 362
 363   dit = &esp_decrypt_async_next;
 364   dit->esp4_post_next =
 365     vnet_crypto_register_post_node (vm, "esp4-decrypt-post");
 366   dit->esp6_post_next =
 367     vnet_crypto_register_post_node (vm, "esp6-decrypt-post");
 368   dit->esp4_tun_post_next =
 369     vnet_crypto_register_post_node (vm, "esp4-decrypt-tun-post");
 370   dit->esp6_tun_post_next =
 371     vnet_crypto_register_post_node (vm, "esp6-decrypt-tun-post");
 372 }
 373
 374 static clib_error_t *
 375 ipsec_init (vlib_main_t * vm)
 376 {
 377   clib_error_t *error;
 378   ipsec_main_t *im = &ipsec_main;
 379   ipsec_main_crypto_alg_t *a;
 380
 381   /* Backend registration requires the feature arcs to be set up */
 382   if ((error = vlib_call_init_function (vm, vnet_feature_init)))
 383     return (error);
 384
 385   im->vnet_main = vnet_get_main ();
 386   im->vlib_main = vm;
 387
 388   im->spd_index_by_spd_id = hash_create (0, sizeof (uword));
 389   im->sa_index_by_sa_id = hash_create (0, sizeof (uword));
 390   im->spd_index_by_sw_if_index = hash_create (0, sizeof (uword));
 391
 392   vlib_node_t *node = vlib_get_node_by_name (vm, (u8 *) "error-drop");
 393   ASSERT (node);
 394   im->error_drop_node_index = node->index;
 395
 396   im->ah_current_backend = ~0;
 397   im->esp_current_backend = ~0;
 398
 399   u32 idx = ipsec_register_ah_backend (vm, im, "crypto engine backend",
 400                                        "ah4-encrypt",
 401                                        "ah4-decrypt",
 402                                        "ah6-encrypt",
 403                                        "ah6-decrypt",
 404                                        ipsec_check_ah_support,
 405                                        NULL);
 406
 407   im->ah_default_backend = idx;
 408   int rv = ipsec_select_ah_backend (im, idx);
 409   ASSERT (0 == rv);
 410   (void) (rv);                  // avoid warning
 411
 412   idx = ipsec_register_esp_backend (
 413     vm, im, "crypto engine backend", "esp4-encrypt", "esp4-encrypt-tun",
 414     "esp4-decrypt", "esp4-decrypt-tun", "esp6-encrypt", "esp6-encrypt-tun",
 415     "esp6-decrypt", "esp6-decrypt-tun", "esp-mpls-encrypt-tun",
 416     ipsec_check_esp_support, NULL, crypto_dispatch_enable_disable);
 417   im->esp_default_backend = idx;
 418
 419   rv = ipsec_select_esp_backend (im, idx);
 420   ASSERT (0 == rv);
 421   (void) (rv);                  // avoid warning
 422
 423   if ((error = vlib_call_init_function (vm, ipsec_cli_init)))
 424     return error;
 425
 426   vec_validate (im->crypto_algs, IPSEC_CRYPTO_N_ALG - 1);
 427
 428   a = im->crypto_algs + IPSEC_CRYPTO_ALG_NONE;
 429   a->enc_op_id = VNET_CRYPTO_OP_NONE;
 430   a->dec_op_id = VNET_CRYPTO_OP_NONE;
 431   a->alg = VNET_CRYPTO_ALG_NONE;
 432   a->iv_size = 0;
 433   a->block_align = 1;
 434
 435   a = im->crypto_algs + IPSEC_CRYPTO_ALG_DES_CBC;
 436   a->enc_op_id = VNET_CRYPTO_OP_DES_CBC_ENC;
 437   a->dec_op_id = VNET_CRYPTO_OP_DES_CBC_DEC;
 438   a->alg = VNET_CRYPTO_ALG_DES_CBC;
 439   a->iv_size = a->block_align = 8;
 440
 441   a = im->crypto_algs + IPSEC_CRYPTO_ALG_3DES_CBC;
 442   a->enc_op_id = VNET_CRYPTO_OP_3DES_CBC_ENC;
 443   a->dec_op_id = VNET_CRYPTO_OP_3DES_CBC_DEC;
 444   a->alg = VNET_CRYPTO_ALG_3DES_CBC;
 445   a->iv_size = a->block_align = 8;
 446
 447   a = im->crypto_algs + IPSEC_CRYPTO_ALG_AES_CBC_128;
 448   a->enc_op_id = VNET_CRYPTO_OP_AES_128_CBC_ENC;
 449   a->dec_op_id = VNET_CRYPTO_OP_AES_128_CBC_DEC;
 450   a->alg = VNET_CRYPTO_ALG_AES_128_CBC;
 451   a->iv_size = a->block_align = 16;
 452
 453   a = im->crypto_algs + IPSEC_CRYPTO_ALG_AES_CBC_192;
 454   a->enc_op_id = VNET_CRYPTO_OP_AES_192_CBC_ENC;
 455   a->dec_op_id = VNET_CRYPTO_OP_AES_192_CBC_DEC;
 456   a->alg = VNET_CRYPTO_ALG_AES_192_CBC;
 457   a->iv_size = a->block_align = 16;
 458
 459   a = im->crypto_algs + IPSEC_CRYPTO_ALG_AES_CBC_256;
 460   a->enc_op_id = VNET_CRYPTO_OP_AES_256_CBC_ENC;
 461   a->dec_op_id = VNET_CRYPTO_OP_AES_256_CBC_DEC;
 462   a->alg = VNET_CRYPTO_ALG_AES_256_CBC;
 463   a->iv_size = a->block_align = 16;
 464
 465   a = im->crypto_algs + IPSEC_CRYPTO_ALG_AES_CTR_128;
 466   a->enc_op_id = VNET_CRYPTO_OP_AES_128_CTR_ENC;
 467   a->dec_op_id = VNET_CRYPTO_OP_AES_128_CTR_DEC;
 468   a->alg = VNET_CRYPTO_ALG_AES_128_CTR;
 469   a->iv_size = 8;
 470   a->block_align = 1;
 471
 472   a = im->crypto_algs + IPSEC_CRYPTO_ALG_AES_CTR_192;
 473   a->enc_op_id = VNET_CRYPTO_OP_AES_192_CTR_ENC;
 474   a->dec_op_id = VNET_CRYPTO_OP_AES_192_CTR_DEC;
 475   a->alg = VNET_CRYPTO_ALG_AES_192_CTR;
 476   a->iv_size = 8;
 477   a->block_align = 1;
 478
 479   a = im->crypto_algs + IPSEC_CRYPTO_ALG_AES_CTR_256;
 480   a->enc_op_id = VNET_CRYPTO_OP_AES_256_CTR_ENC;
 481   a->dec_op_id = VNET_CRYPTO_OP_AES_256_CTR_DEC;
 482   a->alg = VNET_CRYPTO_ALG_AES_256_CTR;
 483   a->iv_size = 8;
 484   a->block_align = 1;
 485
 486   a = im->crypto_algs + IPSEC_CRYPTO_ALG_AES_GCM_128;
 487   a->enc_op_id = VNET_CRYPTO_OP_AES_128_GCM_ENC;
 488   a->dec_op_id = VNET_CRYPTO_OP_AES_128_GCM_DEC;
 489   a->alg = VNET_CRYPTO_ALG_AES_128_GCM;
 490   a->iv_size = 8;
 491   a->block_align = 1;
 492   a->icv_size = 16;
 493
 494   a = im->crypto_algs + IPSEC_CRYPTO_ALG_AES_GCM_192;
 495   a->enc_op_id = VNET_CRYPTO_OP_AES_192_GCM_ENC;
 496   a->dec_op_id = VNET_CRYPTO_OP_AES_192_GCM_DEC;
 497   a->alg = VNET_CRYPTO_ALG_AES_192_GCM;
 498   a->iv_size = 8;
 499   a->block_align = 1;
 500   a->icv_size = 16;
 501
 502   a = im->crypto_algs + IPSEC_CRYPTO_ALG_AES_GCM_256;
 503   a->enc_op_id = VNET_CRYPTO_OP_AES_256_GCM_ENC;
 504   a->dec_op_id = VNET_CRYPTO_OP_AES_256_GCM_DEC;
 505   a->alg = VNET_CRYPTO_ALG_AES_256_GCM;
 506   a->iv_size = 8;
 507   a->block_align = 1;
 508   a->icv_size = 16;
 509
 510   vec_validate (im->integ_algs, IPSEC_INTEG_N_ALG - 1);
 511   ipsec_main_integ_alg_t *i;
 512
 513   i = &im->integ_algs[IPSEC_INTEG_ALG_MD5_96];
 514   i->op_id = VNET_CRYPTO_OP_MD5_HMAC;
 515   i->alg = VNET_CRYPTO_ALG_HMAC_MD5;
 516   i->icv_size = 12;
 517
 518   i = &im->integ_algs[IPSEC_INTEG_ALG_SHA1_96];
 519   i->op_id = VNET_CRYPTO_OP_SHA1_HMAC;
 520   i->alg = VNET_CRYPTO_ALG_HMAC_SHA1;
 521   i->icv_size = 12;
 522
 523   i = &im->integ_algs[IPSEC_INTEG_ALG_SHA_256_96];
 524   i->op_id = VNET_CRYPTO_OP_SHA1_HMAC;
 525   i->alg = VNET_CRYPTO_ALG_HMAC_SHA256;
 526   i->icv_size = 12;
 527
 528   i = &im->integ_algs[IPSEC_INTEG_ALG_SHA_256_128];
 529   i->op_id = VNET_CRYPTO_OP_SHA256_HMAC;
 530   i->alg = VNET_CRYPTO_ALG_HMAC_SHA256;
 531   i->icv_size = 16;
 532
 533   i = &im->integ_algs[IPSEC_INTEG_ALG_SHA_384_192];
 534   i->op_id = VNET_CRYPTO_OP_SHA384_HMAC;
 535   i->alg = VNET_CRYPTO_ALG_HMAC_SHA384;
 536   i->icv_size = 24;
 537
 538   i = &im->integ_algs[IPSEC_INTEG_ALG_SHA_512_256];
 539   i->op_id = VNET_CRYPTO_OP_SHA512_HMAC;
 540   i->alg = VNET_CRYPTO_ALG_HMAC_SHA512;
 541   i->icv_size = 32;
 542
 543   vec_validate_aligned (im->ptd, vlib_num_workers (), CLIB_CACHE_LINE_BYTES);
 544
 545   im->async_mode = 0;
 546   crypto_engine_backend_register_post_node (vm);
 547
 548   return 0;
 549 }
 550
 551 VLIB_INIT_FUNCTION (ipsec_init);
 552
 553 static clib_error_t *
 554 ipsec_config (vlib_main_t *vm, unformat_input_t *input)
 555 {
 556   unformat_input_t sub_input;
 557
 558   while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
 559     {
 560       if (unformat (input, "ip4 %U", unformat_vlib_cli_sub_input, &sub_input))
 561         {
 562           uword table_size = ~0;
 563           u32 n_buckets = ~0;
 564
 565           while (unformat_check_input (&sub_input) != UNFORMAT_END_OF_INPUT)
 566             {
 567               if (unformat (&sub_input, "num-buckets %u", &n_buckets))
 568                 ;
 569               else
 570                 return clib_error_return (0, "unknown input `%U'",
 571                                           format_unformat_error, &sub_input);
 572             }
 573
 574           ipsec_tun_table_init (AF_IP4, table_size, n_buckets);
 575         }
 576       else if (unformat (input, "ip6 %U", unformat_vlib_cli_sub_input,
 577                          &sub_input))
 578         {
 579           uword table_size = ~0;
 580           u32 n_buckets = ~0;
 581
 582           while (unformat_check_input (&sub_input) != UNFORMAT_END_OF_INPUT)
 583             {
 584               if (unformat (&sub_input, "num-buckets %u", &n_buckets))
 585                 ;
 586               else
 587                 return clib_error_return (0, "unknown input `%U'",
 588                                           format_unformat_error, &sub_input);
 589             }
 590
 591           ipsec_tun_table_init (AF_IP6, table_size, n_buckets);
 592         }
 593       else
 594         return clib_error_return (0, "unknown input `%U'",
 595                                   format_unformat_error, input);
 596     }
 597
 598   return 0;
 599 }
 600
 601 VLIB_CONFIG_FUNCTION (ipsec_config, "ipsec");
 602
 603 /*
 604  * fd.io coding-style-patch-verification: ON
 605  *
 606  * Local Variables:
 607  * eval: (c-set-style "gnu")
 608  * End:
 609  */