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 #include <vnet/ipsec/ipsec_itf.h>
  29 #include <vnet/ipsec/ipsec_spd_fp_lookup.h>
  30
  31 /* Flow cache is sized for 1 million flows with a load factor of .25.
  32  */
  33 #define IPSEC4_OUT_SPD_DEFAULT_HASH_NUM_BUCKETS (1 << 22)
  34
  35 /* Flow cache is sized for 1 million flows with a load factor of .25.
  36  */
  37 #define IPSEC4_SPD_DEFAULT_HASH_NUM_BUCKETS (1 << 22)
  38
  39 ipsec_main_t ipsec_main;
  40
  41 esp_async_post_next_t esp_encrypt_async_next;
  42 esp_async_post_next_t esp_decrypt_async_next;
  43
  44 clib_error_t *
  45 ipsec_register_next_header (vlib_main_t *vm, u8 next_header,
  46                             const char *next_node)
  47 {
  48   ipsec_main_t *im = &ipsec_main;
  49   const vlib_node_t *node = vlib_get_node_by_name (vm, (u8 *) next_node);
  50   /* -post nodes (eg. esp4-decrypt-post) are siblings of non-post nodes (eg.
  51    * esp4-decrypt) and will therefore have the same next index */
  52   const vlib_node_t *esp_decrypt_nodes[] = {
  53     vlib_get_node (vm, im->esp4_decrypt_node_index),
  54     vlib_get_node (vm, im->esp6_decrypt_node_index),
  55     vlib_get_node (vm, im->esp4_decrypt_tun_node_index),
  56     vlib_get_node (vm, im->esp6_decrypt_tun_node_index),
  57   };
  58   uword slot, max;
  59   int i;
  60
  61   /* looks for a next_index value that we can use for all esp decrypt nodes to
  62    * avoid maintaining different next index arrays... */
  63
  64   slot = vlib_node_get_next (vm, esp_decrypt_nodes[0]->index, node->index);
  65   max = vec_len (esp_decrypt_nodes[0]->next_nodes);
  66   for (i = 1; i < ARRAY_LEN (esp_decrypt_nodes); i++)
  67     {
  68       /* if next node already exists, check it shares the same next_index */
  69       if (slot !=
  70           vlib_node_get_next (vm, esp_decrypt_nodes[i]->index, node->index))
  71         return clib_error_return (
  72           0, "next node already exists with different next index");
  73       /* compute a suitable slot from the max of all nodes next index */
  74       max = clib_max (max, vec_len (esp_decrypt_nodes[i]->next_nodes));
  75     }
  76
  77   if (~0 == slot)
  78     {
  79       /* next node not there yet, add it using the computed max */
  80       slot = max;
  81       for (i = 0; i < ARRAY_LEN (esp_decrypt_nodes); i++)
  82         vlib_node_add_next_with_slot (vm, esp_decrypt_nodes[i]->index,
  83                                       node->index, slot);
  84     }
  85
  86   im->next_header_registrations[next_header] = slot;
  87   return 0;
  88 }
  89
  90 static clib_error_t *
  91 ipsec_check_ah_support (ipsec_sa_t * sa)
  92 {
  93   ipsec_main_t *im = &ipsec_main;
  94
  95   if (sa->integ_alg == IPSEC_INTEG_ALG_NONE)
  96     return clib_error_return (0, "unsupported none integ-alg");
  97
  98   if (!vnet_crypto_is_set_handler (im->integ_algs[sa->integ_alg].alg))
  99     return clib_error_return (0, "No crypto engine support for %U",
 100                               format_ipsec_integ_alg, sa->integ_alg);
 101
 102   return 0;
 103 }
 104
 105 static clib_error_t *
 106 ipsec_check_esp_support (ipsec_sa_t * sa)
 107 {
 108   ipsec_main_t *im = &ipsec_main;
 109
 110   if (IPSEC_INTEG_ALG_NONE != sa->integ_alg)
 111     {
 112       if (!vnet_crypto_is_set_handler (im->integ_algs[sa->integ_alg].alg))
 113         return clib_error_return (0, "No crypto engine support for %U",
 114                                   format_ipsec_integ_alg, sa->integ_alg);
 115     }
 116   if (IPSEC_CRYPTO_ALG_NONE != sa->crypto_alg)
 117     {
 118       if (!vnet_crypto_is_set_handler (im->crypto_algs[sa->crypto_alg].alg))
 119         return clib_error_return (0, "No crypto engine support for %U",
 120                                   format_ipsec_crypto_alg, sa->crypto_alg);
 121     }
 122
 123   return (0);
 124 }
 125
 126 clib_error_t *
 127 ipsec_add_del_sa_sess_cb (ipsec_main_t * im, u32 sa_index, u8 is_add)
 128 {
 129   ipsec_ah_backend_t *ah =
 130     pool_elt_at_index (im->ah_backends, im->ah_current_backend);
 131   if (ah->add_del_sa_sess_cb)
 132     {
 133       clib_error_t *err = ah->add_del_sa_sess_cb (sa_index, is_add);
 134       if (err)
 135         return err;
 136     }
 137   ipsec_esp_backend_t *esp =
 138     pool_elt_at_index (im->esp_backends, im->esp_current_backend);
 139   if (esp->add_del_sa_sess_cb)
 140     {
 141       clib_error_t *err = esp->add_del_sa_sess_cb (sa_index, is_add);
 142       if (err)
 143         return err;
 144     }
 145   return 0;
 146 }
 147
 148 clib_error_t *
 149 ipsec_check_support_cb (ipsec_main_t * im, ipsec_sa_t * sa)
 150 {
 151   clib_error_t *error = 0;
 152
 153   if (PREDICT_FALSE (sa->protocol == IPSEC_PROTOCOL_AH))
 154     {
 155       ipsec_ah_backend_t *ah =
 156         pool_elt_at_index (im->ah_backends, im->ah_current_backend);
 157       ASSERT (ah->check_support_cb);
 158       error = ah->check_support_cb (sa);
 159     }
 160   else
 161     {
 162       ipsec_esp_backend_t *esp =
 163         pool_elt_at_index (im->esp_backends, im->esp_current_backend);
 164       ASSERT (esp->check_support_cb);
 165       error = esp->check_support_cb (sa);
 166     }
 167   return error;
 168 }
 169
 170
 171 static void
 172 ipsec_add_node (vlib_main_t * vm, const char *node_name,
 173                 const char *prev_node_name, u32 * out_node_index,
 174                 u32 * out_next_index)
 175 {
 176   vlib_node_t *prev_node, *node;
 177   prev_node = vlib_get_node_by_name (vm, (u8 *) prev_node_name);
 178   ASSERT (prev_node);
 179   node = vlib_get_node_by_name (vm, (u8 *) node_name);
 180   ASSERT (node);
 181   *out_node_index = node->index;
 182   *out_next_index = vlib_node_add_next (vm, prev_node->index, node->index);
 183 }
 184
 185 void
 186 ipsec_unregister_udp_port (u16 port)
 187 {
 188   ipsec_main_t *im = &ipsec_main;
 189   u32 n_regs;
 190   uword *p;
 191
 192   p = hash_get (im->udp_port_registrations, port);
 193
 194   ASSERT (p);
 195
 196   n_regs = p[0];
 197
 198   if (0 == --n_regs)
 199     {
 200       udp_unregister_dst_port (vlib_get_main (), port, 1);
 201       hash_unset (im->udp_port_registrations, port);
 202     }
 203   else
 204     {
 205       hash_unset (im->udp_port_registrations, port);
 206       hash_set (im->udp_port_registrations, port, n_regs);
 207     }
 208 }
 209
 210 void
 211 ipsec_register_udp_port (u16 port)
 212 {
 213   ipsec_main_t *im = &ipsec_main;
 214   u32 n_regs;
 215   uword *p;
 216
 217   p = hash_get (im->udp_port_registrations, port);
 218
 219   n_regs = (p ? p[0] : 0);
 220
 221   if (0 == n_regs++)
 222     udp_register_dst_port (vlib_get_main (), port,
 223                            ipsec4_tun_input_node.index, 1);
 224
 225   hash_unset (im->udp_port_registrations, port);
 226   hash_set (im->udp_port_registrations, port, n_regs);
 227 }
 228
 229 u32
 230 ipsec_register_ah_backend (vlib_main_t * vm, ipsec_main_t * im,
 231                            const char *name,
 232                            const char *ah4_encrypt_node_name,
 233                            const char *ah4_decrypt_node_name,
 234                            const char *ah6_encrypt_node_name,
 235                            const char *ah6_decrypt_node_name,
 236                            check_support_cb_t ah_check_support_cb,
 237                            add_del_sa_sess_cb_t ah_add_del_sa_sess_cb)
 238 {
 239   ipsec_ah_backend_t *b;
 240   pool_get (im->ah_backends, b);
 241   b->name = format (0, "%s%c", name, 0);
 242
 243   ipsec_add_node (vm, ah4_encrypt_node_name, "ipsec4-output-feature",
 244                   &b->ah4_encrypt_node_index, &b->ah4_encrypt_next_index);
 245   ipsec_add_node (vm, ah4_decrypt_node_name, "ipsec4-input-feature",
 246                   &b->ah4_decrypt_node_index, &b->ah4_decrypt_next_index);
 247   ipsec_add_node (vm, ah6_encrypt_node_name, "ipsec6-output-feature",
 248                   &b->ah6_encrypt_node_index, &b->ah6_encrypt_next_index);
 249   ipsec_add_node (vm, ah6_decrypt_node_name, "ipsec6-input-feature",
 250                   &b->ah6_decrypt_node_index, &b->ah6_decrypt_next_index);
 251
 252   b->check_support_cb = ah_check_support_cb;
 253   b->add_del_sa_sess_cb = ah_add_del_sa_sess_cb;
 254   return b - im->ah_backends;
 255 }
 256
 257 u32
 258 ipsec_register_esp_backend (
 259   vlib_main_t *vm, ipsec_main_t *im, const char *name,
 260   const char *esp4_encrypt_node_name, const char *esp4_encrypt_node_tun_name,
 261   const char *esp4_decrypt_node_name, const char *esp4_decrypt_tun_node_name,
 262   const char *esp6_encrypt_node_name, const char *esp6_encrypt_node_tun_name,
 263   const char *esp6_decrypt_node_name, const char *esp6_decrypt_tun_node_name,
 264   const char *esp_mpls_encrypt_node_tun_name,
 265   check_support_cb_t esp_check_support_cb,
 266   add_del_sa_sess_cb_t esp_add_del_sa_sess_cb,
 267   enable_disable_cb_t enable_disable_cb)
 268 {
 269   ipsec_esp_backend_t *b;
 270
 271   pool_get (im->esp_backends, b);
 272   b->name = format (0, "%s%c", name, 0);
 273
 274   ipsec_add_node (vm, esp4_encrypt_node_name, "ipsec4-output-feature",
 275                   &b->esp4_encrypt_node_index, &b->esp4_encrypt_next_index);
 276   ipsec_add_node (vm, esp4_decrypt_node_name, "ipsec4-input-feature",
 277                   &b->esp4_decrypt_node_index, &b->esp4_decrypt_next_index);
 278   ipsec_add_node (vm, esp6_encrypt_node_name, "ipsec6-output-feature",
 279                   &b->esp6_encrypt_node_index, &b->esp6_encrypt_next_index);
 280   ipsec_add_node (vm, esp6_decrypt_node_name, "ipsec6-input-feature",
 281                   &b->esp6_decrypt_node_index, &b->esp6_decrypt_next_index);
 282   ipsec_add_node (vm, esp4_decrypt_tun_node_name, "ipsec4-tun-input",
 283                   &b->esp4_decrypt_tun_node_index,
 284                   &b->esp4_decrypt_tun_next_index);
 285   ipsec_add_node (vm, esp6_decrypt_tun_node_name, "ipsec6-tun-input",
 286                   &b->esp6_decrypt_tun_node_index,
 287                   &b->esp6_decrypt_tun_next_index);
 288
 289   b->esp6_encrypt_tun_node_index =
 290     vlib_get_node_by_name (vm, (u8 *) esp6_encrypt_node_tun_name)->index;
 291   b->esp_mpls_encrypt_tun_node_index =
 292     vlib_get_node_by_name (vm, (u8 *) esp_mpls_encrypt_node_tun_name)->index;
 293   b->esp4_encrypt_tun_node_index =
 294     vlib_get_node_by_name (vm, (u8 *) esp4_encrypt_node_tun_name)->index;
 295
 296   b->check_support_cb = esp_check_support_cb;
 297   b->add_del_sa_sess_cb = esp_add_del_sa_sess_cb;
 298   b->enable_disable_cb = enable_disable_cb;
 299
 300   return b - im->esp_backends;
 301 }
 302
 303 clib_error_t *
 304 ipsec_rsc_in_use (ipsec_main_t * im)
 305 {
 306   /* return an error is crypto resource are in use */
 307   if (pool_elts (ipsec_sa_pool) > 0)
 308     return clib_error_return (0, "%d SA entries configured",
 309                               pool_elts (ipsec_sa_pool));
 310   if (ipsec_itf_count () > 0)
 311     return clib_error_return (0, "%d IPSec interface configured",
 312                               ipsec_itf_count ());
 313
 314   return (NULL);
 315 }
 316
 317 int
 318 ipsec_select_ah_backend (ipsec_main_t * im, u32 backend_idx)
 319 {
 320   if (ipsec_rsc_in_use (im))
 321     return VNET_API_ERROR_RSRC_IN_USE;
 322
 323   if (pool_is_free_index (im->ah_backends, backend_idx))
 324     return VNET_API_ERROR_INVALID_VALUE;
 325
 326   ipsec_ah_backend_t *b = pool_elt_at_index (im->ah_backends, backend_idx);
 327   im->ah_current_backend = backend_idx;
 328   im->ah4_encrypt_node_index = b->ah4_encrypt_node_index;
 329   im->ah4_decrypt_node_index = b->ah4_decrypt_node_index;
 330   im->ah4_encrypt_next_index = b->ah4_encrypt_next_index;
 331   im->ah4_decrypt_next_index = b->ah4_decrypt_next_index;
 332   im->ah6_encrypt_node_index = b->ah6_encrypt_node_index;
 333   im->ah6_decrypt_node_index = b->ah6_decrypt_node_index;
 334   im->ah6_encrypt_next_index = b->ah6_encrypt_next_index;
 335   im->ah6_decrypt_next_index = b->ah6_decrypt_next_index;
 336
 337   return 0;
 338 }
 339
 340 int
 341 ipsec_select_esp_backend (ipsec_main_t * im, u32 backend_idx)
 342 {
 343   if (ipsec_rsc_in_use (im))
 344     return VNET_API_ERROR_RSRC_IN_USE;
 345
 346   if (pool_is_free_index (im->esp_backends, backend_idx))
 347     return VNET_API_ERROR_INVALID_VALUE;
 348
 349   /* disable current backend */
 350   if (im->esp_current_backend != ~0)
 351     {
 352       ipsec_esp_backend_t *cb = pool_elt_at_index (im->esp_backends,
 353                                                    im->esp_current_backend);
 354       if (cb->enable_disable_cb)
 355         {
 356           if ((cb->enable_disable_cb) (0) != 0)
 357             return -1;
 358         }
 359     }
 360
 361   ipsec_esp_backend_t *b = pool_elt_at_index (im->esp_backends, backend_idx);
 362   im->esp_current_backend = backend_idx;
 363   im->esp4_encrypt_node_index = b->esp4_encrypt_node_index;
 364   im->esp4_decrypt_node_index = b->esp4_decrypt_node_index;
 365   im->esp4_encrypt_next_index = b->esp4_encrypt_next_index;
 366   im->esp4_decrypt_next_index = b->esp4_decrypt_next_index;
 367   im->esp6_encrypt_node_index = b->esp6_encrypt_node_index;
 368   im->esp6_decrypt_node_index = b->esp6_decrypt_node_index;
 369   im->esp6_encrypt_next_index = b->esp6_encrypt_next_index;
 370   im->esp6_decrypt_next_index = b->esp6_decrypt_next_index;
 371   im->esp4_decrypt_tun_node_index = b->esp4_decrypt_tun_node_index;
 372   im->esp4_decrypt_tun_next_index = b->esp4_decrypt_tun_next_index;
 373   im->esp6_decrypt_tun_node_index = b->esp6_decrypt_tun_node_index;
 374   im->esp6_decrypt_tun_next_index = b->esp6_decrypt_tun_next_index;
 375   im->esp4_encrypt_tun_node_index = b->esp4_encrypt_tun_node_index;
 376   im->esp6_encrypt_tun_node_index = b->esp6_encrypt_tun_node_index;
 377   im->esp_mpls_encrypt_tun_node_index = b->esp_mpls_encrypt_tun_node_index;
 378
 379   if (b->enable_disable_cb)
 380     {
 381       if ((b->enable_disable_cb) (1) != 0)
 382         return -1;
 383     }
 384   return 0;
 385 }
 386
 387 void
 388 ipsec_set_async_mode (u32 is_enabled)
 389 {
 390   ipsec_main_t *im = &ipsec_main;
 391   ipsec_sa_t *sa;
 392
 393   vnet_crypto_request_async_mode (is_enabled);
 394
 395   im->async_mode = is_enabled;
 396
 397   /* change SA crypto op data */
 398   pool_foreach (sa, ipsec_sa_pool)
 399     {
 400       sa->crypto_op_data =
 401         (is_enabled ? sa->async_op_data.data : sa->sync_op_data.data);
 402     }
 403 }
 404
 405 static void
 406 crypto_engine_backend_register_post_node (vlib_main_t * vm)
 407 {
 408   esp_async_post_next_t *eit;
 409   esp_async_post_next_t *dit;
 410
 411   eit = &esp_encrypt_async_next;
 412   eit->esp4_post_next =
 413     vnet_crypto_register_post_node (vm, "esp4-encrypt-post");
 414   eit->esp6_post_next =
 415     vnet_crypto_register_post_node (vm, "esp6-encrypt-post");
 416   eit->esp4_tun_post_next =
 417     vnet_crypto_register_post_node (vm, "esp4-encrypt-tun-post");
 418   eit->esp6_tun_post_next =
 419     vnet_crypto_register_post_node (vm, "esp6-encrypt-tun-post");
 420   eit->esp_mpls_tun_post_next =
 421     vnet_crypto_register_post_node (vm, "esp-mpls-encrypt-tun-post");
 422
 423   dit = &esp_decrypt_async_next;
 424   dit->esp4_post_next =
 425     vnet_crypto_register_post_node (vm, "esp4-decrypt-post");
 426   dit->esp6_post_next =
 427     vnet_crypto_register_post_node (vm, "esp6-decrypt-post");
 428   dit->esp4_tun_post_next =
 429     vnet_crypto_register_post_node (vm, "esp4-decrypt-tun-post");
 430   dit->esp6_tun_post_next =
 431     vnet_crypto_register_post_node (vm, "esp6-decrypt-tun-post");
 432 }
 433
 434 static clib_error_t *
 435 ipsec_init (vlib_main_t * vm)
 436 {
 437   clib_error_t *error;
 438   ipsec_main_t *im = &ipsec_main;
 439   ipsec_main_crypto_alg_t *a;
 440
 441   /* Backend registration requires the feature arcs to be set up */
 442   if ((error = vlib_call_init_function (vm, vnet_feature_init)))
 443     return (error);
 444
 445   im->vnet_main = vnet_get_main ();
 446   im->vlib_main = vm;
 447
 448   im->spd_index_by_spd_id = hash_create (0, sizeof (uword));
 449   im->sa_index_by_sa_id = hash_create (0, sizeof (uword));
 450   im->spd_index_by_sw_if_index = hash_create (0, sizeof (uword));
 451
 452   vlib_node_t *node = vlib_get_node_by_name (vm, (u8 *) "error-drop");
 453   ASSERT (node);
 454   im->error_drop_node_index = node->index;
 455
 456   im->ah_current_backend = ~0;
 457   im->esp_current_backend = ~0;
 458
 459   u32 idx = ipsec_register_ah_backend (vm, im, "crypto engine backend",
 460                                        "ah4-encrypt",
 461                                        "ah4-decrypt",
 462                                        "ah6-encrypt",
 463                                        "ah6-decrypt",
 464                                        ipsec_check_ah_support,
 465                                        NULL);
 466
 467   im->ah_default_backend = idx;
 468   int rv = ipsec_select_ah_backend (im, idx);
 469   ASSERT (0 == rv);
 470   (void) (rv);                  // avoid warning
 471
 472   idx = ipsec_register_esp_backend (
 473     vm, im, "crypto engine backend", "esp4-encrypt", "esp4-encrypt-tun",
 474     "esp4-decrypt", "esp4-decrypt-tun", "esp6-encrypt", "esp6-encrypt-tun",
 475     "esp6-decrypt", "esp6-decrypt-tun", "esp-mpls-encrypt-tun",
 476     ipsec_check_esp_support, NULL, crypto_dispatch_enable_disable);
 477   im->esp_default_backend = idx;
 478
 479   rv = ipsec_select_esp_backend (im, idx);
 480   ASSERT (0 == rv);
 481   (void) (rv);                  // avoid warning
 482
 483   if ((error = vlib_call_init_function (vm, ipsec_cli_init)))
 484     return error;
 485
 486   im->fp_spd_is_enabled = 0;
 487   im->fp_lookup_hash_buckets = IPSEC_FP_HASH_LOOKUP_HASH_BUCKETS;
 488
 489   vec_validate (im->crypto_algs, IPSEC_CRYPTO_N_ALG - 1);
 490
 491   a = im->crypto_algs + IPSEC_CRYPTO_ALG_NONE;
 492   a->enc_op_id = VNET_CRYPTO_OP_NONE;
 493   a->dec_op_id = VNET_CRYPTO_OP_NONE;
 494   a->alg = VNET_CRYPTO_ALG_NONE;
 495   a->iv_size = 0;
 496   a->block_align = 1;
 497
 498   a = im->crypto_algs + IPSEC_CRYPTO_ALG_DES_CBC;
 499   a->enc_op_id = VNET_CRYPTO_OP_DES_CBC_ENC;
 500   a->dec_op_id = VNET_CRYPTO_OP_DES_CBC_DEC;
 501   a->alg = VNET_CRYPTO_ALG_DES_CBC;
 502   a->iv_size = a->block_align = 8;
 503
 504   a = im->crypto_algs + IPSEC_CRYPTO_ALG_3DES_CBC;
 505   a->enc_op_id = VNET_CRYPTO_OP_3DES_CBC_ENC;
 506   a->dec_op_id = VNET_CRYPTO_OP_3DES_CBC_DEC;
 507   a->alg = VNET_CRYPTO_ALG_3DES_CBC;
 508   a->iv_size = a->block_align = 8;
 509
 510   a = im->crypto_algs + IPSEC_CRYPTO_ALG_AES_CBC_128;
 511   a->enc_op_id = VNET_CRYPTO_OP_AES_128_CBC_ENC;
 512   a->dec_op_id = VNET_CRYPTO_OP_AES_128_CBC_DEC;
 513   a->alg = VNET_CRYPTO_ALG_AES_128_CBC;
 514   a->iv_size = a->block_align = 16;
 515
 516   a = im->crypto_algs + IPSEC_CRYPTO_ALG_AES_CBC_192;
 517   a->enc_op_id = VNET_CRYPTO_OP_AES_192_CBC_ENC;
 518   a->dec_op_id = VNET_CRYPTO_OP_AES_192_CBC_DEC;
 519   a->alg = VNET_CRYPTO_ALG_AES_192_CBC;
 520   a->iv_size = a->block_align = 16;
 521
 522   a = im->crypto_algs + IPSEC_CRYPTO_ALG_AES_CBC_256;
 523   a->enc_op_id = VNET_CRYPTO_OP_AES_256_CBC_ENC;
 524   a->dec_op_id = VNET_CRYPTO_OP_AES_256_CBC_DEC;
 525   a->alg = VNET_CRYPTO_ALG_AES_256_CBC;
 526   a->iv_size = a->block_align = 16;
 527
 528   a = im->crypto_algs + IPSEC_CRYPTO_ALG_AES_CTR_128;
 529   a->enc_op_id = VNET_CRYPTO_OP_AES_128_CTR_ENC;
 530   a->dec_op_id = VNET_CRYPTO_OP_AES_128_CTR_DEC;
 531   a->alg = VNET_CRYPTO_ALG_AES_128_CTR;
 532   a->iv_size = 8;
 533   a->block_align = 1;
 534
 535   a = im->crypto_algs + IPSEC_CRYPTO_ALG_AES_CTR_192;
 536   a->enc_op_id = VNET_CRYPTO_OP_AES_192_CTR_ENC;
 537   a->dec_op_id = VNET_CRYPTO_OP_AES_192_CTR_DEC;
 538   a->alg = VNET_CRYPTO_ALG_AES_192_CTR;
 539   a->iv_size = 8;
 540   a->block_align = 1;
 541
 542   a = im->crypto_algs + IPSEC_CRYPTO_ALG_AES_CTR_256;
 543   a->enc_op_id = VNET_CRYPTO_OP_AES_256_CTR_ENC;
 544   a->dec_op_id = VNET_CRYPTO_OP_AES_256_CTR_DEC;
 545   a->alg = VNET_CRYPTO_ALG_AES_256_CTR;
 546   a->iv_size = 8;
 547   a->block_align = 1;
 548
 549   a = im->crypto_algs + IPSEC_CRYPTO_ALG_AES_GCM_128;
 550   a->enc_op_id = VNET_CRYPTO_OP_AES_128_GCM_ENC;
 551   a->dec_op_id = VNET_CRYPTO_OP_AES_128_GCM_DEC;
 552   a->alg = VNET_CRYPTO_ALG_AES_128_GCM;
 553   a->iv_size = 8;
 554   a->block_align = 1;
 555   a->icv_size = 16;
 556
 557   a = im->crypto_algs + IPSEC_CRYPTO_ALG_AES_GCM_192;
 558   a->enc_op_id = VNET_CRYPTO_OP_AES_192_GCM_ENC;
 559   a->dec_op_id = VNET_CRYPTO_OP_AES_192_GCM_DEC;
 560   a->alg = VNET_CRYPTO_ALG_AES_192_GCM;
 561   a->iv_size = 8;
 562   a->block_align = 1;
 563   a->icv_size = 16;
 564
 565   a = im->crypto_algs + IPSEC_CRYPTO_ALG_AES_GCM_256;
 566   a->enc_op_id = VNET_CRYPTO_OP_AES_256_GCM_ENC;
 567   a->dec_op_id = VNET_CRYPTO_OP_AES_256_GCM_DEC;
 568   a->alg = VNET_CRYPTO_ALG_AES_256_GCM;
 569   a->iv_size = 8;
 570   a->block_align = 1;
 571   a->icv_size = 16;
 572
 573   vec_validate (im->integ_algs, IPSEC_INTEG_N_ALG - 1);
 574   ipsec_main_integ_alg_t *i;
 575
 576   i = &im->integ_algs[IPSEC_INTEG_ALG_MD5_96];
 577   i->op_id = VNET_CRYPTO_OP_MD5_HMAC;
 578   i->alg = VNET_CRYPTO_ALG_HMAC_MD5;
 579   i->icv_size = 12;
 580
 581   i = &im->integ_algs[IPSEC_INTEG_ALG_SHA1_96];
 582   i->op_id = VNET_CRYPTO_OP_SHA1_HMAC;
 583   i->alg = VNET_CRYPTO_ALG_HMAC_SHA1;
 584   i->icv_size = 12;
 585
 586   i = &im->integ_algs[IPSEC_INTEG_ALG_SHA_256_96];
 587   i->op_id = VNET_CRYPTO_OP_SHA1_HMAC;
 588   i->alg = VNET_CRYPTO_ALG_HMAC_SHA256;
 589   i->icv_size = 12;
 590
 591   i = &im->integ_algs[IPSEC_INTEG_ALG_SHA_256_128];
 592   i->op_id = VNET_CRYPTO_OP_SHA256_HMAC;
 593   i->alg = VNET_CRYPTO_ALG_HMAC_SHA256;
 594   i->icv_size = 16;
 595
 596   i = &im->integ_algs[IPSEC_INTEG_ALG_SHA_384_192];
 597   i->op_id = VNET_CRYPTO_OP_SHA384_HMAC;
 598   i->alg = VNET_CRYPTO_ALG_HMAC_SHA384;
 599   i->icv_size = 24;
 600
 601   i = &im->integ_algs[IPSEC_INTEG_ALG_SHA_512_256];
 602   i->op_id = VNET_CRYPTO_OP_SHA512_HMAC;
 603   i->alg = VNET_CRYPTO_ALG_HMAC_SHA512;
 604   i->icv_size = 32;
 605
 606   vec_validate_aligned (im->ptd, vlib_num_workers (), CLIB_CACHE_LINE_BYTES);
 607
 608   im->async_mode = 0;
 609   crypto_engine_backend_register_post_node (vm);
 610
 611   im->ipsec4_out_spd_hash_tbl = NULL;
 612   im->output_flow_cache_flag = 0;
 613   im->ipsec4_out_spd_flow_cache_entries = 0;
 614   im->epoch_count = 0;
 615   im->ipsec4_out_spd_hash_num_buckets =
 616     IPSEC4_OUT_SPD_DEFAULT_HASH_NUM_BUCKETS;
 617
 618   im->ipsec4_in_spd_hash_tbl = NULL;
 619   im->input_flow_cache_flag = 0;
 620   im->ipsec4_in_spd_flow_cache_entries = 0;
 621   im->input_epoch_count = 0;
 622   im->ipsec4_in_spd_hash_num_buckets = IPSEC4_SPD_DEFAULT_HASH_NUM_BUCKETS;
 623
 624   vec_validate_init_empty_aligned (im->next_header_registrations, 255, ~0,
 625                                    CLIB_CACHE_LINE_BYTES);
 626
 627   return 0;
 628 }
 629
 630 VLIB_INIT_FUNCTION (ipsec_init);
 631
 632 static clib_error_t *
 633 ipsec_config (vlib_main_t *vm, unformat_input_t *input)
 634 {
 635   ipsec_main_t *im = &ipsec_main;
 636   unformat_input_t sub_input;
 637
 638   u32 ipsec4_out_spd_hash_num_buckets;
 639   u32 ipsec4_in_spd_hash_num_buckets;
 640   u32 ipsec_spd_fp_num_buckets;
 641
 642   while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
 643     {
 644       if (unformat (input, "ipv4-outbound-spd-fast-path on"))
 645         {
 646           im->fp_spd_is_enabled = 1;
 647           im->output_flow_cache_flag = 0;
 648         }
 649       else if (unformat (input, "ipv4-outbound-spd-fast-path off"))
 650         im->fp_spd_is_enabled = 0;
 651       else if (unformat (input, "spd-fast-path-num-buckets %d",
 652                          &ipsec_spd_fp_num_buckets))
 653         {
 654           /* Number of bihash buckets is power of 2 >= input */
 655           im->fp_lookup_hash_buckets = 1ULL
 656                                        << max_log2 (ipsec_spd_fp_num_buckets);
 657         }
 658       else if (unformat (input, "ipv4-outbound-spd-flow-cache on"))
 659         im->output_flow_cache_flag = im->fp_spd_is_enabled ? 0 : 1;
 660       else if (unformat (input, "ipv4-outbound-spd-flow-cache off"))
 661         im->output_flow_cache_flag = 0;
 662       else if (unformat (input, "ipv4-outbound-spd-hash-buckets %d",
 663                          &ipsec4_out_spd_hash_num_buckets))
 664         {
 665           /* Size of hash is power of 2 >= number of buckets */
 666           im->ipsec4_out_spd_hash_num_buckets =
 667             1ULL << max_log2 (ipsec4_out_spd_hash_num_buckets);
 668         }
 669       else if (unformat (input, "ipv4-inbound-spd-flow-cache on"))
 670         im->input_flow_cache_flag = 1;
 671       else if (unformat (input, "ipv4-inbound-spd-flow-cache off"))
 672         im->input_flow_cache_flag = 0;
 673       else if (unformat (input, "ipv4-inbound-spd-hash-buckets %d",
 674                          &ipsec4_in_spd_hash_num_buckets))
 675         {
 676           im->ipsec4_in_spd_hash_num_buckets =
 677             1ULL << max_log2 (ipsec4_in_spd_hash_num_buckets);
 678         }
 679       else if (unformat (input, "ip4 %U", unformat_vlib_cli_sub_input,
 680                          &sub_input))
 681         {
 682           uword table_size = ~0;
 683           u32 n_buckets = ~0;
 684
 685           while (unformat_check_input (&sub_input) != UNFORMAT_END_OF_INPUT)
 686             {
 687               if (unformat (&sub_input, "num-buckets %u", &n_buckets))
 688                 ;
 689               else
 690                 return clib_error_return (0, "unknown input `%U'",
 691                                           format_unformat_error, &sub_input);
 692             }
 693
 694           ipsec_tun_table_init (AF_IP4, table_size, n_buckets);
 695         }
 696       else if (unformat (input, "ip6 %U", unformat_vlib_cli_sub_input,
 697                          &sub_input))
 698         {
 699           uword table_size = ~0;
 700           u32 n_buckets = ~0;
 701
 702           while (unformat_check_input (&sub_input) != UNFORMAT_END_OF_INPUT)
 703             {
 704               if (unformat (&sub_input, "num-buckets %u", &n_buckets))
 705                 ;
 706               else
 707                 return clib_error_return (0, "unknown input `%U'",
 708                                           format_unformat_error, &sub_input);
 709             }
 710
 711           ipsec_tun_table_init (AF_IP6, table_size, n_buckets);
 712         }
 713       else
 714         return clib_error_return (0, "unknown input `%U'",
 715                                   format_unformat_error, input);
 716     }
 717   if (im->output_flow_cache_flag)
 718     {
 719       vec_add2 (im->ipsec4_out_spd_hash_tbl, im->ipsec4_out_spd_hash_tbl,
 720                 im->ipsec4_out_spd_hash_num_buckets);
 721     }
 722   if (im->input_flow_cache_flag)
 723     {
 724       vec_add2 (im->ipsec4_in_spd_hash_tbl, im->ipsec4_in_spd_hash_tbl,
 725                 im->ipsec4_in_spd_hash_num_buckets);
 726     }
 727
 728   return 0;
 729 }
 730
 731 VLIB_CONFIG_FUNCTION (ipsec_config, "ipsec");
 732
 733 /*
 734  * fd.io coding-style-patch-verification: ON
 735  *
 736  * Local Variables:
 737  * eval: (c-set-style "gnu")
 738  * End:
 739  */