src/plugins/ioam/lib-vxlan-gpe/vxlan_gpe_ioam.c

   1 /*
   2  * Copyright (c) 2016 Cisco and/or its affiliates.
   3  * Licensed under the Apache License, Version 2.0 (the "License");
   4  * you may not use this file except in compliance with the License.
   5  * You may obtain a copy of the License at:
   6  *
   7  *     http://www.apache.org/licenses/LICENSE-2.0
   8  *
   9  * Unless required by applicable law or agreed to in writing, software
  10  * distributed under the License is distributed on an "AS IS" BASIS,
  11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12  * See the License for the specific language governing permissions and
  13  * limitations under the License.
  14  */
  15 #include <vnet/vxlan-gpe/vxlan_gpe.h>
  16 #include <vnet/vxlan-gpe/vxlan_gpe_packet.h>
  17 #include <vnet/ip/format.h>
  18 #include <ioam/lib-vxlan-gpe/vxlan_gpe_ioam.h>
  19 #include <vnet/fib/ip6_fib.h>
  20 #include <vnet/fib/ip4_fib.h>
  21 #include <vnet/fib/fib_entry.h>
  22
  23 vxlan_gpe_ioam_main_t vxlan_gpe_ioam_main;
  24
  25 int
  26 vxlan_gpe_ioam_set_rewrite (vxlan_gpe_tunnel_t * t, int has_trace_option,
  27                             int has_pot_option, int has_ppc_option,
  28                             u8 ipv6_set)
  29 {
  30   vxlan_gpe_ioam_main_t *hm = &vxlan_gpe_ioam_main;
  31   u32 size;
  32   vxlan_gpe_ioam_hdr_t *vxlan_gpe_ioam_hdr;
  33   u8 *current;
  34   u8 trace_data_size = 0;
  35   u8 pot_data_size = 0;
  36
  37   if (has_trace_option == 0 && has_pot_option == 0)
  38     return -1;
  39
  40   /* Work out how much space we need */
  41   size = sizeof (vxlan_gpe_ioam_hdr_t);
  42
  43   if (has_trace_option
  44       && hm->add_options[VXLAN_GPE_OPTION_TYPE_IOAM_TRACE] != 0)
  45     {
  46       size += sizeof (vxlan_gpe_ioam_option_t);
  47       size += hm->options_size[VXLAN_GPE_OPTION_TYPE_IOAM_TRACE];
  48     }
  49   if (has_pot_option
  50       && hm->add_options[VXLAN_GPE_OPTION_TYPE_IOAM_PROOF_OF_TRANSIT] != 0)
  51     {
  52       size += sizeof (vxlan_gpe_ioam_option_t);
  53       size += hm->options_size[VXLAN_GPE_OPTION_TYPE_IOAM_PROOF_OF_TRANSIT];
  54     }
  55
  56   t->rewrite_size = size;
  57
  58   if (!ipv6_set)
  59     {
  60       vxlan4_gpe_rewrite (t, size, VXLAN_GPE_PROTOCOL_IOAM,
  61                           hm->encap_v4_next_node);
  62       vxlan_gpe_ioam_hdr =
  63         (vxlan_gpe_ioam_hdr_t *) (t->rewrite +
  64                                   sizeof (ip4_vxlan_gpe_header_t));
  65     }
  66   else
  67     {
  68       vxlan6_gpe_rewrite (t, size, VXLAN_GPE_PROTOCOL_IOAM,
  69                           VXLAN_GPE_ENCAP_NEXT_IP6_LOOKUP);
  70       vxlan_gpe_ioam_hdr =
  71         (vxlan_gpe_ioam_hdr_t *) (t->rewrite +
  72                                   sizeof (ip6_vxlan_gpe_header_t));
  73     }
  74
  75
  76   vxlan_gpe_ioam_hdr->type = VXLAN_GPE_PROTOCOL_IOAM;
  77   /* Length of the header in octets */
  78   vxlan_gpe_ioam_hdr->length = size;
  79   vxlan_gpe_ioam_hdr->protocol = t->protocol;
  80   current = (u8 *) vxlan_gpe_ioam_hdr + sizeof (vxlan_gpe_ioam_hdr_t);
  81
  82   if (has_trace_option
  83       && hm->add_options[VXLAN_GPE_OPTION_TYPE_IOAM_TRACE] != 0)
  84     {
  85       if (0 != hm->add_options[VXLAN_GPE_OPTION_TYPE_IOAM_TRACE] (current,
  86                                                                   &trace_data_size))
  87         return -1;
  88       current += trace_data_size;
  89     }
  90   if (has_pot_option
  91       && hm->add_options[VXLAN_GPE_OPTION_TYPE_IOAM_PROOF_OF_TRANSIT] != 0)
  92     {
  93       pot_data_size =
  94         hm->options_size[VXLAN_GPE_OPTION_TYPE_IOAM_PROOF_OF_TRANSIT];
  95       if (0 ==
  96           hm->add_options[VXLAN_GPE_OPTION_TYPE_IOAM_PROOF_OF_TRANSIT]
  97           (current, &pot_data_size))
  98         current += pot_data_size;
  99     }
 100
 101   return 0;
 102 }
 103
 104 int
 105 vxlan_gpe_ioam_clear_rewrite (vxlan_gpe_tunnel_t * t, int has_trace_option,
 106                               int has_pot_option, int has_ppc_option,
 107                               u8 ipv6_set)
 108 {
 109
 110   t->rewrite_size = 0;
 111
 112   if (!ipv6_set)
 113     {
 114       vxlan4_gpe_rewrite (t, 0, 0, VXLAN_GPE_ENCAP_NEXT_IP4_LOOKUP);
 115     }
 116   else
 117     {
 118       vxlan6_gpe_rewrite (t, 0, 0, VXLAN_GPE_ENCAP_NEXT_IP6_LOOKUP);
 119     }
 120
 121
 122   return 0;
 123 }
 124
 125 clib_error_t *
 126 vxlan_gpe_ioam_clear (vxlan_gpe_tunnel_t * t,
 127                       int has_trace_option, int has_pot_option,
 128                       int has_ppc_option, u8 ipv6_set)
 129 {
 130   int rv;
 131   rv = vxlan_gpe_ioam_clear_rewrite (t, 0, 0, 0, 0);
 132
 133   if (rv == 0)
 134     {
 135       return (0);
 136     }
 137   else
 138     {
 139       return clib_error_return_code (0, rv, 0,
 140                                      "vxlan_gpe_ioam_clear_rewrite returned %d",
 141                                      rv);
 142     }
 143
 144 }
 145
 146
 147 clib_error_t *
 148 vxlan_gpe_ioam_set (vxlan_gpe_tunnel_t * t,
 149                     int has_trace_option, int has_pot_option,
 150                     int has_ppc_option, u8 ipv6_set)
 151 {
 152   int rv;
 153   rv = vxlan_gpe_ioam_set_rewrite (t, has_trace_option,
 154                                    has_pot_option, has_ppc_option, ipv6_set);
 155
 156   if (rv == 0)
 157     {
 158       return (0);
 159     }
 160   else
 161     {
 162       return clib_error_return_code (0, rv, 0,
 163                                      "vxlan_gpe_ioam_set_rewrite returned %d",
 164                                      rv);
 165     }
 166
 167 }
 168
 169 static void
 170 vxlan_gpe_set_clear_output_feature_on_intf (vlib_main_t * vm,
 171                                             u32 sw_if_index0, u8 is_add)
 172 {
 173
 174
 175
 176   vnet_feature_enable_disable ("ip4-output", "vxlan-gpe-transit-ioam",
 177                                sw_if_index0, is_add,
 178                                0 /* void *feature_config */ ,
 179                                0 /* u32 n_feature_config_bytes */ );
 180   return;
 181 }
 182
 183 void
 184 vxlan_gpe_clear_output_feature_on_all_intfs (vlib_main_t * vm)
 185 {
 186   vnet_sw_interface_t *si = 0;
 187   vnet_main_t *vnm = vnet_get_main ();
 188   vnet_interface_main_t *im = &vnm->interface_main;
 189
 190   pool_foreach (si, im->sw_interfaces, (
 191                                          {
 192                                          vxlan_gpe_set_clear_output_feature_on_intf
 193                                          (vm, si->sw_if_index, 0);
 194                                          }));
 195   return;
 196 }
 197
 198
 199 extern fib_forward_chain_type_t
 200 fib_entry_get_default_chain_type (const fib_entry_t * fib_entry);
 201
 202 int
 203 vxlan_gpe_enable_disable_ioam_for_dest (vlib_main_t * vm,
 204                                         ip46_address_t dst_addr,
 205                                         u32 outer_fib_index,
 206                                         u8 is_ipv4, u8 is_add)
 207 {
 208   vxlan_gpe_ioam_main_t *hm = &vxlan_gpe_ioam_main;
 209   u32 fib_index0 = 0;
 210   u32 sw_if_index0 = ~0;
 211
 212   fib_node_index_t fei = ~0;
 213   fib_entry_t *fib_entry;
 214   u32 adj_index0;
 215   ip_adjacency_t *adj0;
 216   fib_prefix_t fib_prefix;
 217   //fib_forward_chain_type_t fct;
 218   load_balance_t *lb_m, *lb_b;
 219   const dpo_id_t *dpo0, *dpo1;
 220   u32 i, j;
 221   //vnet_hw_interface_t *hw;
 222
 223   if (is_ipv4)
 224     {
 225       memset (&fib_prefix, 0, sizeof (fib_prefix_t));
 226       fib_prefix.fp_len = 32;
 227       fib_prefix.fp_proto = FIB_PROTOCOL_IP4;
 228       fib_prefix.fp_addr = dst_addr;
 229     }
 230   else
 231     {
 232       return 0;
 233     }
 234
 235   fei = fib_table_lookup (fib_index0, &fib_prefix);
 236   fib_entry = fib_entry_get (fei);
 237
 238   //fct = fib_entry_get_default_chain_type (fib_entry);
 239
 240   if (!dpo_id_is_valid (&fib_entry->fe_lb /*[fct] */ ))
 241     {
 242       return (-1);
 243     }
 244
 245   lb_m = load_balance_get (fib_entry->fe_lb /*[fct] */ .dpoi_index);
 246
 247   for (i = 0; i < lb_m->lb_n_buckets; i++)
 248     {
 249       dpo0 = load_balance_get_bucket_i (lb_m, i);
 250
 251       if (dpo0->dpoi_type == DPO_LOAD_BALANCE)
 252         {
 253           lb_b = load_balance_get (dpo0->dpoi_index);
 254
 255           for (j = 0; j < lb_b->lb_n_buckets; j++)
 256             {
 257               dpo1 = load_balance_get_bucket_i (lb_b, j);
 258
 259               if (dpo1->dpoi_type == DPO_ADJACENCY)
 260                 {
 261                   adj_index0 = dpo1->dpoi_index;
 262
 263                   if (ADJ_INDEX_INVALID == adj_index0)
 264                     {
 265                       continue;
 266                     }
 267
 268                   adj0 = adj_get (adj_index0);
 269                   sw_if_index0 = adj0->rewrite_header.sw_if_index;
 270
 271                   if (~0 == sw_if_index0)
 272                     {
 273                       continue;
 274                     }
 275
 276
 277                   if (is_add)
 278                     {
 279                       vnet_feature_enable_disable ("ip4-output",
 280                                                    "vxlan-gpe-transit-ioam",
 281                                                    sw_if_index0, is_add, 0
 282                                                    /* void *feature_config */
 283                                                    , 0  /* u32 n_feature_config_bytes */
 284                         );
 285
 286                       vec_validate_init_empty (hm->bool_ref_by_sw_if_index,
 287                                                sw_if_index0, ~0);
 288                       hm->bool_ref_by_sw_if_index[sw_if_index0] = 1;
 289                     }
 290                   else
 291                     {
 292                       hm->bool_ref_by_sw_if_index[sw_if_index0] = ~0;
 293                     }
 294                 }
 295             }
 296         }
 297     }
 298
 299   if (is_ipv4)
 300     {
 301
 302       uword *t = NULL;
 303       vxlan_gpe_ioam_dest_tunnels_t *t1;
 304       fib_prefix_t key4, *key4_copy;
 305       hash_pair_t *hp;
 306       memset (&key4, 0, sizeof (key4));
 307       key4.fp_proto = FIB_PROTOCOL_IP4;
 308       key4.fp_addr.ip4.as_u32 = fib_prefix.fp_addr.ip4.as_u32;
 309       t = hash_get_mem (hm->dst_by_ip4, &key4);
 310       if (is_add)
 311         {
 312           if (t)
 313             {
 314               return 0;
 315             }
 316           pool_get_aligned (hm->dst_tunnels, t1, CLIB_CACHE_LINE_BYTES);
 317           memset (t1, 0, sizeof (*t1));
 318           t1->fp_proto = FIB_PROTOCOL_IP4;
 319           t1->dst_addr.ip4.as_u32 = fib_prefix.fp_addr.ip4.as_u32;
 320           key4_copy = clib_mem_alloc (sizeof (*key4_copy));
 321           clib_memcpy (key4_copy, &key4, sizeof (*key4_copy));
 322           hash_set_mem (hm->dst_by_ip4, key4_copy, t1 - hm->dst_tunnels);
 323           /*
 324            * Attach to the FIB entry for the VxLAN-GPE destination
 325            * and become its child. The dest route will invoke a callback
 326            * when the fib entry changes, it can be used to
 327            * re-program the output feature on the egress interface.
 328            */
 329
 330           const fib_prefix_t tun_dst_pfx = {
 331             .fp_len = 32,
 332             .fp_proto = FIB_PROTOCOL_IP4,
 333             .fp_addr = {.ip4 = t1->dst_addr.ip4,}
 334           };
 335
 336           t1->fib_entry_index =
 337             fib_table_entry_special_add (outer_fib_index,
 338                                          &tun_dst_pfx,
 339                                          FIB_SOURCE_RR,
 340                                          FIB_ENTRY_FLAG_NONE,
 341                                          ADJ_INDEX_INVALID);
 342           t1->sibling_index =
 343             fib_entry_child_add (t1->fib_entry_index,
 344                                  hm->fib_entry_type, t1 - hm->dst_tunnels);
 345           t1->outer_fib_index = outer_fib_index;
 346
 347         }
 348       else
 349         {
 350           if (!t)
 351             {
 352               return 0;
 353             }
 354           t1 = pool_elt_at_index (hm->dst_tunnels, t[0]);
 355           hp = hash_get_pair (hm->dst_by_ip4, &key4);
 356           key4_copy = (void *) (hp->key);
 357           hash_unset_mem (hm->dst_by_ip4, &key4);
 358           clib_mem_free (key4_copy);
 359           pool_put (hm->dst_tunnels, t1);
 360         }
 361     }
 362   else
 363     {
 364       // TBD for IPv6
 365     }
 366
 367   return 0;
 368 }
 369
 370 void
 371 vxlan_gpe_refresh_output_feature_on_all_dest (void)
 372 {
 373   vxlan_gpe_ioam_main_t *hm = &vxlan_gpe_ioam_main;
 374   vxlan_gpe_ioam_dest_tunnels_t *t;
 375   u32 i;
 376   if (pool_elts (hm->dst_tunnels) == 0)
 377     return;
 378   vxlan_gpe_clear_output_feature_on_all_intfs (hm->vlib_main);
 379   i = vec_len (hm->bool_ref_by_sw_if_index);
 380   vec_free (hm->bool_ref_by_sw_if_index);
 381   vec_validate_init_empty (hm->bool_ref_by_sw_if_index, i, ~0);
 382   pool_foreach (t, hm->dst_tunnels, (
 383                                       {
 384                                       vxlan_gpe_enable_disable_ioam_for_dest
 385                                       (hm->vlib_main,
 386                                        t->dst_addr,
 387                                        t->outer_fib_index,
 388                                        (t->fp_proto == FIB_PROTOCOL_IP4), 1
 389                                        /* is_add */
 390                                       );
 391                                       }
 392                 ));
 393   return;
 394 }
 395
 396 void
 397 vxlan_gpe_clear_output_feature_on_select_intfs (void)
 398 {
 399   vxlan_gpe_ioam_main_t *hm = &vxlan_gpe_ioam_main;
 400   u32 sw_if_index0 = 0;
 401   for (sw_if_index0 = 0;
 402        sw_if_index0 < vec_len (hm->bool_ref_by_sw_if_index); sw_if_index0++)
 403     {
 404       if (hm->bool_ref_by_sw_if_index[sw_if_index0] == 0xFF)
 405         {
 406           vxlan_gpe_set_clear_output_feature_on_intf
 407             (hm->vlib_main, sw_if_index0, 0);
 408         }
 409     }
 410
 411   return;
 412 }
 413
 414 static clib_error_t *
 415 vxlan_gpe_set_ioam_rewrite_command_fn (vlib_main_t *
 416                                        vm,
 417                                        unformat_input_t
 418                                        * input, vlib_cli_command_t * cmd)
 419 {
 420   vxlan_gpe_ioam_main_t *hm = &vxlan_gpe_ioam_main;
 421   ip46_address_t local, remote;
 422   u8 local_set = 0;
 423   u8 remote_set = 0;
 424   u8 ipv4_set = 0;
 425   u8 ipv6_set = 0;
 426   u32 vni;
 427   u8 vni_set = 0;
 428   u8 disable = 0;
 429   clib_error_t *rv = 0;
 430   vxlan4_gpe_tunnel_key_t key4;
 431   vxlan6_gpe_tunnel_key_t key6;
 432   uword *p;
 433   vxlan_gpe_main_t *gm = &vxlan_gpe_main;
 434   vxlan_gpe_tunnel_t *t = 0;
 435   while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
 436     {
 437       if (unformat (input, "local %U", unformat_ip4_address, &local.ip4))
 438         {
 439           local_set = 1;
 440           ipv4_set = 1;
 441         }
 442       else
 443         if (unformat (input, "remote %U", unformat_ip4_address, &remote.ip4))
 444         {
 445           remote_set = 1;
 446           ipv4_set = 1;
 447         }
 448       else if (unformat (input, "local %U", unformat_ip6_address, &local.ip6))
 449         {
 450           local_set = 1;
 451           ipv6_set = 1;
 452         }
 453       else
 454         if (unformat (input, "remote %U", unformat_ip6_address, &remote.ip6))
 455         {
 456           remote_set = 1;
 457           ipv6_set = 1;
 458         }
 459       else if (unformat (input, "vni %d", &vni))
 460         vni_set = 1;
 461       else if (unformat (input, "disable"))
 462         disable = 1;
 463       else
 464         break;
 465     }
 466
 467   if (local_set == 0)
 468     return clib_error_return (0, "tunnel local address not specified");
 469   if (remote_set == 0)
 470     return clib_error_return (0, "tunnel remote address not specified");
 471   if (ipv4_set && ipv6_set)
 472     return clib_error_return (0, "both IPv4 and IPv6 addresses specified");
 473   if ((ipv4_set
 474        && memcmp (&local.ip4, &remote.ip4,
 475                   sizeof (local.ip4)) == 0) || (ipv6_set
 476                                                 &&
 477                                                 memcmp
 478                                                 (&local.ip6,
 479                                                  &remote.ip6,
 480                                                  sizeof (local.ip6)) == 0))
 481     return clib_error_return (0, "src and dst addresses are identical");
 482   if (vni_set == 0)
 483     return clib_error_return (0, "vni not specified");
 484   if (!ipv6_set)
 485     {
 486       key4.local = local.ip4.as_u32;
 487       key4.remote = remote.ip4.as_u32;
 488       key4.vni = clib_host_to_net_u32 (vni << 8);
 489       key4.pad = 0;
 490       p = hash_get_mem (gm->vxlan4_gpe_tunnel_by_key, &key4);
 491     }
 492   else
 493     {
 494       key6.local.as_u64[0] = local.ip6.as_u64[0];
 495       key6.local.as_u64[1] = local.ip6.as_u64[1];
 496       key6.remote.as_u64[0] = remote.ip6.as_u64[0];
 497       key6.remote.as_u64[1] = remote.ip6.as_u64[1];
 498       key6.vni = clib_host_to_net_u32 (vni << 8);
 499       p = hash_get_mem (gm->vxlan6_gpe_tunnel_by_key, &key6);
 500     }
 501
 502   if (!p)
 503     return clib_error_return (0, "VxLAN Tunnel not found");
 504   t = pool_elt_at_index (gm->tunnels, p[0]);
 505   if (!disable)
 506     {
 507       rv =
 508         vxlan_gpe_ioam_set (t, hm->has_trace_option,
 509                             hm->has_pot_option, hm->has_ppc_option, ipv6_set);
 510     }
 511   else
 512     {
 513       rv = vxlan_gpe_ioam_clear (t, 0, 0, 0, 0);
 514     }
 515   return rv;
 516 }
 517
 518
 519 /* *INDENT-OFF* */
 520 VLIB_CLI_COMMAND (vxlan_gpe_set_ioam_rewrite_cmd, static) = {
 521   .path = "set vxlan-gpe-ioam",
 522   .short_help = "set vxlan-gpe-ioam vxlan <src-ip> <dst_ip> <vnid> [disable]",
 523   .function = vxlan_gpe_set_ioam_rewrite_command_fn,
 524 };
 525 /* *INDENT-ON* */
 526
 527
 528
 529 clib_error_t *
 530 vxlan_gpe_ioam_enable (int has_trace_option,
 531                        int has_pot_option, int has_ppc_option)
 532 {
 533   vxlan_gpe_ioam_main_t *hm = &vxlan_gpe_ioam_main;
 534   hm->has_trace_option = has_trace_option;
 535   hm->has_pot_option = has_pot_option;
 536   hm->has_ppc_option = has_ppc_option;
 537   if (hm->has_trace_option)
 538     {
 539       vxlan_gpe_trace_profile_setup ();
 540     }
 541
 542   return 0;
 543 }
 544
 545 clib_error_t *
 546 vxlan_gpe_ioam_disable (int
 547                         has_trace_option,
 548                         int has_pot_option, int has_ppc_option)
 549 {
 550   vxlan_gpe_ioam_main_t *hm = &vxlan_gpe_ioam_main;
 551   hm->has_trace_option = has_trace_option;
 552   hm->has_pot_option = has_pot_option;
 553   hm->has_ppc_option = has_ppc_option;
 554   if (!hm->has_trace_option)
 555     {
 556       vxlan_gpe_trace_profile_cleanup ();
 557     }
 558
 559   return 0;
 560 }
 561
 562 void
 563 vxlan_gpe_set_next_override (uword next)
 564 {
 565   vxlan_gpe_ioam_main_t *hm = &vxlan_gpe_ioam_main;
 566   hm->decap_v4_next_override = next;
 567   return;
 568 }
 569
 570 static clib_error_t *
 571 vxlan_gpe_set_ioam_flags_command_fn (vlib_main_t * vm,
 572                                      unformat_input_t
 573                                      * input, vlib_cli_command_t * cmd)
 574 {
 575   int has_trace_option = 0;
 576   int has_pot_option = 0;
 577   int has_ppc_option = 0;
 578   clib_error_t *rv = 0;
 579   while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
 580     {
 581       if (unformat (input, "trace"))
 582         has_trace_option = 1;
 583       else if (unformat (input, "pot"))
 584         has_pot_option = 1;
 585       else if (unformat (input, "ppc encap"))
 586         has_ppc_option = PPC_ENCAP;
 587       else if (unformat (input, "ppc decap"))
 588         has_ppc_option = PPC_DECAP;
 589       else if (unformat (input, "ppc none"))
 590         has_ppc_option = PPC_NONE;
 591       else
 592         break;
 593     }
 594
 595
 596   rv =
 597     vxlan_gpe_ioam_enable (has_trace_option, has_pot_option, has_ppc_option);
 598   return rv;
 599 }
 600
 601 /* *INDENT-OFF* */
 602 VLIB_CLI_COMMAND (vxlan_gpe_set_ioam_flags_cmd, static) =
 603 {
 604 .path = "set vxlan-gpe-ioam rewrite",
 605 .short_help = "set vxlan-gpe-ioam [trace] [pot] [ppc <encap|decap>]",
 606 .function = vxlan_gpe_set_ioam_flags_command_fn,};
 607 /* *INDENT-ON* */
 608
 609
 610 int vxlan_gpe_ioam_disable_for_dest
 611   (vlib_main_t * vm, ip46_address_t dst_addr, u32 outer_fib_index,
 612    u8 ipv4_set)
 613 {
 614   vxlan_gpe_ioam_dest_tunnels_t *t;
 615   vxlan_gpe_ioam_main_t *hm = &vxlan_gpe_ioam_main;
 616
 617   vxlan_gpe_enable_disable_ioam_for_dest (hm->vlib_main,
 618                                           dst_addr, outer_fib_index, ipv4_set,
 619                                           0);
 620   if (pool_elts (hm->dst_tunnels) == 0)
 621     {
 622       vxlan_gpe_clear_output_feature_on_select_intfs ();
 623       return 0;
 624     }
 625
 626   pool_foreach (t, hm->dst_tunnels, (
 627                                       {
 628                                       vxlan_gpe_enable_disable_ioam_for_dest
 629                                       (hm->vlib_main,
 630                                        t->dst_addr,
 631                                        t->outer_fib_index,
 632                                        (t->fp_proto ==
 633                                         FIB_PROTOCOL_IP4), 1 /* is_add */ );
 634                                       }
 635                 ));
 636   vxlan_gpe_clear_output_feature_on_select_intfs ();
 637   return (0);
 638
 639 }
 640
 641 static clib_error_t *vxlan_gpe_set_ioam_transit_rewrite_command_fn
 642   (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd)
 643 {
 644   vxlan_gpe_ioam_main_t *hm = &vxlan_gpe_ioam_main;
 645   ip46_address_t dst_addr;
 646   u8 dst_addr_set = 0;
 647   u8 ipv4_set = 0;
 648   u8 ipv6_set = 0;
 649   u8 disable = 0;
 650   clib_error_t *rv = 0;
 651   u32 outer_fib_index = 0;
 652   while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
 653     {
 654       if (unformat (input, "dst-ip %U", unformat_ip4_address, &dst_addr.ip4))
 655         {
 656           dst_addr_set = 1;
 657           ipv4_set = 1;
 658         }
 659       else
 660         if (unformat
 661             (input, "dst-ip %U", unformat_ip6_address, &dst_addr.ip6))
 662         {
 663           dst_addr_set = 1;
 664           ipv6_set = 1;
 665         }
 666       else if (unformat (input, "outer-fib-index %d", &outer_fib_index))
 667         {
 668         }
 669
 670       else if (unformat (input, "disable"))
 671         disable = 1;
 672       else
 673         break;
 674     }
 675
 676   if (dst_addr_set == 0)
 677     return clib_error_return (0, "tunnel destination address not specified");
 678   if (ipv4_set && ipv6_set)
 679     return clib_error_return (0, "both IPv4 and IPv6 addresses specified");
 680   if (!disable)
 681     {
 682       vxlan_gpe_enable_disable_ioam_for_dest (hm->vlib_main,
 683                                               dst_addr, outer_fib_index,
 684                                               ipv4_set, 1);
 685     }
 686   else
 687     {
 688       vxlan_gpe_ioam_disable_for_dest
 689         (vm, dst_addr, outer_fib_index, ipv4_set);
 690     }
 691   return rv;
 692 }
 693
 694        /* *INDENT-OFF* */
 695 VLIB_CLI_COMMAND (vxlan_gpe_set_ioam_transit_rewrite_cmd, static) = {
 696   .path = "set vxlan-gpe-ioam-transit",
 697   .short_help = "set vxlan-gpe-ioam-transit dst-ip <dst_ip> [outer-fib-index <outer_fib_index>] [disable]",
 698   .function = vxlan_gpe_set_ioam_transit_rewrite_command_fn,
 699 };
 700 /* *INDENT-ON* */
 701
 702 clib_error_t *clear_vxlan_gpe_ioam_rewrite_command_fn
 703   (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd)
 704 {
 705   return (vxlan_gpe_ioam_disable (0, 0, 0));
 706 }
 707
 708 /* *INDENT-OFF* */
 709 VLIB_CLI_COMMAND (vxlan_gpe_clear_ioam_flags_cmd, static) =
 710 {
 711 .path = "clear vxlan-gpe-ioam rewrite",
 712 .short_help = "clear vxlan-gpe-ioam rewrite",
 713 .function = clear_vxlan_gpe_ioam_rewrite_command_fn,
 714 };
 715 /* *INDENT-ON* */
 716
 717
 718 /**
 719  * Function definition to backwalk a FIB node
 720  */
 721 static fib_node_back_walk_rc_t
 722 vxlan_gpe_ioam_back_walk (fib_node_t * node, fib_node_back_walk_ctx_t * ctx)
 723 {
 724   vxlan_gpe_refresh_output_feature_on_all_dest ();
 725   return (FIB_NODE_BACK_WALK_CONTINUE);
 726 }
 727
 728 /**
 729  * Function definition to get a FIB node from its index
 730  */
 731 static fib_node_t *
 732 vxlan_gpe_ioam_fib_node_get (fib_node_index_t index)
 733 {
 734   vxlan_gpe_ioam_main_t *hm = &vxlan_gpe_ioam_main;
 735   return (&hm->node);
 736 }
 737
 738 /**
 739  * Function definition to inform the FIB node that its last lock has gone.
 740  */
 741 static void
 742 vxlan_gpe_ioam_last_lock_gone (fib_node_t * node)
 743 {
 744   ASSERT (0);
 745 }
 746
 747
 748 /*
 749  * Virtual function table registered by MPLS GRE tunnels
 750  * for participation in the FIB object graph.
 751  */
 752 const static fib_node_vft_t vxlan_gpe_ioam_vft = {
 753   .fnv_get = vxlan_gpe_ioam_fib_node_get,
 754   .fnv_last_lock = vxlan_gpe_ioam_last_lock_gone,
 755   .fnv_back_walk = vxlan_gpe_ioam_back_walk,
 756 };
 757
 758 void
 759 vxlan_gpe_ioam_interface_init (void)
 760 {
 761   vxlan_gpe_ioam_main_t *hm = &vxlan_gpe_ioam_main;
 762   hm->fib_entry_type = fib_node_register_new_type (&vxlan_gpe_ioam_vft);
 763   return;
 764 }
 765
 766 /*
 767  * fd.io coding-style-patch-verification: ON
 768  *
 769  * Local Variables:
 770  * eval: (c-set-style "gnu")
 771  * End:
 772  */