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/dpo/load_balance.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, FIB_ENTRY_FLAG_NONE);
 340           t1->sibling_index =
 341             fib_entry_child_add (t1->fib_entry_index,
 342                                  hm->fib_entry_type, t1 - hm->dst_tunnels);
 343           t1->outer_fib_index = outer_fib_index;
 344
 345         }
 346       else
 347         {
 348           if (!t)
 349             {
 350               return 0;
 351             }
 352           t1 = pool_elt_at_index (hm->dst_tunnels, t[0]);
 353           hp = hash_get_pair (hm->dst_by_ip4, &key4);
 354           key4_copy = (void *) (hp->key);
 355           hash_unset_mem (hm->dst_by_ip4, &key4);
 356           clib_mem_free (key4_copy);
 357           pool_put (hm->dst_tunnels, t1);
 358         }
 359     }
 360   else
 361     {
 362       // TBD for IPv6
 363     }
 364
 365   return 0;
 366 }
 367
 368 void
 369 vxlan_gpe_refresh_output_feature_on_all_dest (void)
 370 {
 371   vxlan_gpe_ioam_main_t *hm = &vxlan_gpe_ioam_main;
 372   vxlan_gpe_ioam_dest_tunnels_t *t;
 373   u32 i;
 374   if (pool_elts (hm->dst_tunnels) == 0)
 375     return;
 376   vxlan_gpe_clear_output_feature_on_all_intfs (hm->vlib_main);
 377   i = vec_len (hm->bool_ref_by_sw_if_index);
 378   vec_free (hm->bool_ref_by_sw_if_index);
 379   vec_validate_init_empty (hm->bool_ref_by_sw_if_index, i, ~0);
 380   pool_foreach (t, hm->dst_tunnels, (
 381                                       {
 382                                       vxlan_gpe_enable_disable_ioam_for_dest
 383                                       (hm->vlib_main,
 384                                        t->dst_addr,
 385                                        t->outer_fib_index,
 386                                        (t->fp_proto == FIB_PROTOCOL_IP4), 1
 387                                        /* is_add */
 388                                       );
 389                                       }
 390                 ));
 391   return;
 392 }
 393
 394 void
 395 vxlan_gpe_clear_output_feature_on_select_intfs (void)
 396 {
 397   vxlan_gpe_ioam_main_t *hm = &vxlan_gpe_ioam_main;
 398   u32 sw_if_index0 = 0;
 399   for (sw_if_index0 = 0;
 400        sw_if_index0 < vec_len (hm->bool_ref_by_sw_if_index); sw_if_index0++)
 401     {
 402       if (hm->bool_ref_by_sw_if_index[sw_if_index0] == 0xFF)
 403         {
 404           vxlan_gpe_set_clear_output_feature_on_intf
 405             (hm->vlib_main, sw_if_index0, 0);
 406         }
 407     }
 408
 409   return;
 410 }
 411
 412 static clib_error_t *
 413 vxlan_gpe_set_ioam_rewrite_command_fn (vlib_main_t *
 414                                        vm,
 415                                        unformat_input_t
 416                                        * input, vlib_cli_command_t * cmd)
 417 {
 418   vxlan_gpe_ioam_main_t *hm = &vxlan_gpe_ioam_main;
 419   ip46_address_t local, remote;
 420   u8 local_set = 0;
 421   u8 remote_set = 0;
 422   u8 ipv4_set = 0;
 423   u8 ipv6_set = 0;
 424   u32 vni;
 425   u8 vni_set = 0;
 426   u8 disable = 0;
 427   clib_error_t *rv = 0;
 428   vxlan4_gpe_tunnel_key_t key4;
 429   vxlan6_gpe_tunnel_key_t key6;
 430   uword *p;
 431   vxlan_gpe_main_t *gm = &vxlan_gpe_main;
 432   vxlan_gpe_tunnel_t *t = 0;
 433   while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
 434     {
 435       if (unformat (input, "local %U", unformat_ip4_address, &local.ip4))
 436         {
 437           local_set = 1;
 438           ipv4_set = 1;
 439         }
 440       else
 441         if (unformat (input, "remote %U", unformat_ip4_address, &remote.ip4))
 442         {
 443           remote_set = 1;
 444           ipv4_set = 1;
 445         }
 446       else if (unformat (input, "local %U", unformat_ip6_address, &local.ip6))
 447         {
 448           local_set = 1;
 449           ipv6_set = 1;
 450         }
 451       else
 452         if (unformat (input, "remote %U", unformat_ip6_address, &remote.ip6))
 453         {
 454           remote_set = 1;
 455           ipv6_set = 1;
 456         }
 457       else if (unformat (input, "vni %d", &vni))
 458         vni_set = 1;
 459       else if (unformat (input, "disable"))
 460         disable = 1;
 461       else
 462         break;
 463     }
 464
 465   if (local_set == 0)
 466     return clib_error_return (0, "tunnel local address not specified");
 467   if (remote_set == 0)
 468     return clib_error_return (0, "tunnel remote address not specified");
 469   if (ipv4_set && ipv6_set)
 470     return clib_error_return (0, "both IPv4 and IPv6 addresses specified");
 471   if ((ipv4_set
 472        && memcmp (&local.ip4, &remote.ip4,
 473                   sizeof (local.ip4)) == 0) || (ipv6_set
 474                                                 &&
 475                                                 memcmp
 476                                                 (&local.ip6,
 477                                                  &remote.ip6,
 478                                                  sizeof (local.ip6)) == 0))
 479     return clib_error_return (0, "src and dst addresses are identical");
 480   if (vni_set == 0)
 481     return clib_error_return (0, "vni not specified");
 482   if (!ipv6_set)
 483     {
 484       key4.local = local.ip4.as_u32;
 485       key4.remote = remote.ip4.as_u32;
 486       key4.vni = clib_host_to_net_u32 (vni << 8);
 487       key4.pad = 0;
 488       p = hash_get_mem (gm->vxlan4_gpe_tunnel_by_key, &key4);
 489     }
 490   else
 491     {
 492       key6.local.as_u64[0] = local.ip6.as_u64[0];
 493       key6.local.as_u64[1] = local.ip6.as_u64[1];
 494       key6.remote.as_u64[0] = remote.ip6.as_u64[0];
 495       key6.remote.as_u64[1] = remote.ip6.as_u64[1];
 496       key6.vni = clib_host_to_net_u32 (vni << 8);
 497       p = hash_get_mem (gm->vxlan6_gpe_tunnel_by_key, &key6);
 498     }
 499
 500   if (!p)
 501     return clib_error_return (0, "VxLAN Tunnel not found");
 502   t = pool_elt_at_index (gm->tunnels, p[0]);
 503   if (!disable)
 504     {
 505       rv =
 506         vxlan_gpe_ioam_set (t, hm->has_trace_option,
 507                             hm->has_pot_option, hm->has_ppc_option, ipv6_set);
 508     }
 509   else
 510     {
 511       rv = vxlan_gpe_ioam_clear (t, 0, 0, 0, 0);
 512     }
 513   return rv;
 514 }
 515
 516
 517 /* *INDENT-OFF* */
 518 VLIB_CLI_COMMAND (vxlan_gpe_set_ioam_rewrite_cmd, static) = {
 519   .path = "set vxlan-gpe-ioam",
 520   .short_help = "set vxlan-gpe-ioam vxlan <src-ip> <dst_ip> <vnid> [disable]",
 521   .function = vxlan_gpe_set_ioam_rewrite_command_fn,
 522 };
 523 /* *INDENT-ON* */
 524
 525
 526
 527 clib_error_t *
 528 vxlan_gpe_ioam_enable (int has_trace_option,
 529                        int has_pot_option, int has_ppc_option)
 530 {
 531   vxlan_gpe_ioam_main_t *hm = &vxlan_gpe_ioam_main;
 532   hm->has_trace_option = has_trace_option;
 533   hm->has_pot_option = has_pot_option;
 534   hm->has_ppc_option = has_ppc_option;
 535   if (hm->has_trace_option)
 536     {
 537       vxlan_gpe_trace_profile_setup ();
 538     }
 539
 540   return 0;
 541 }
 542
 543 clib_error_t *
 544 vxlan_gpe_ioam_disable (int
 545                         has_trace_option,
 546                         int has_pot_option, int has_ppc_option)
 547 {
 548   vxlan_gpe_ioam_main_t *hm = &vxlan_gpe_ioam_main;
 549   hm->has_trace_option = has_trace_option;
 550   hm->has_pot_option = has_pot_option;
 551   hm->has_ppc_option = has_ppc_option;
 552   if (!hm->has_trace_option)
 553     {
 554       vxlan_gpe_trace_profile_cleanup ();
 555     }
 556
 557   return 0;
 558 }
 559
 560 void
 561 vxlan_gpe_set_next_override (uword next)
 562 {
 563   vxlan_gpe_ioam_main_t *hm = &vxlan_gpe_ioam_main;
 564   hm->decap_v4_next_override = next;
 565   return;
 566 }
 567
 568 static clib_error_t *
 569 vxlan_gpe_set_ioam_flags_command_fn (vlib_main_t * vm,
 570                                      unformat_input_t
 571                                      * input, vlib_cli_command_t * cmd)
 572 {
 573   int has_trace_option = 0;
 574   int has_pot_option = 0;
 575   int has_ppc_option = 0;
 576   clib_error_t *rv = 0;
 577   while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
 578     {
 579       if (unformat (input, "trace"))
 580         has_trace_option = 1;
 581       else if (unformat (input, "pot"))
 582         has_pot_option = 1;
 583       else if (unformat (input, "ppc encap"))
 584         has_ppc_option = PPC_ENCAP;
 585       else if (unformat (input, "ppc decap"))
 586         has_ppc_option = PPC_DECAP;
 587       else if (unformat (input, "ppc none"))
 588         has_ppc_option = PPC_NONE;
 589       else
 590         break;
 591     }
 592
 593
 594   rv =
 595     vxlan_gpe_ioam_enable (has_trace_option, has_pot_option, has_ppc_option);
 596   return rv;
 597 }
 598
 599 /* *INDENT-OFF* */
 600 VLIB_CLI_COMMAND (vxlan_gpe_set_ioam_flags_cmd, static) =
 601 {
 602 .path = "set vxlan-gpe-ioam rewrite",
 603 .short_help = "set vxlan-gpe-ioam [trace] [pot] [ppc <encap|decap>]",
 604 .function = vxlan_gpe_set_ioam_flags_command_fn,};
 605 /* *INDENT-ON* */
 606
 607
 608 int vxlan_gpe_ioam_disable_for_dest
 609   (vlib_main_t * vm, ip46_address_t dst_addr, u32 outer_fib_index,
 610    u8 ipv4_set)
 611 {
 612   vxlan_gpe_ioam_dest_tunnels_t *t;
 613   vxlan_gpe_ioam_main_t *hm = &vxlan_gpe_ioam_main;
 614
 615   vxlan_gpe_enable_disable_ioam_for_dest (hm->vlib_main,
 616                                           dst_addr, outer_fib_index, ipv4_set,
 617                                           0);
 618   if (pool_elts (hm->dst_tunnels) == 0)
 619     {
 620       vxlan_gpe_clear_output_feature_on_select_intfs ();
 621       return 0;
 622     }
 623
 624   pool_foreach (t, hm->dst_tunnels, (
 625                                       {
 626                                       vxlan_gpe_enable_disable_ioam_for_dest
 627                                       (hm->vlib_main,
 628                                        t->dst_addr,
 629                                        t->outer_fib_index,
 630                                        (t->fp_proto ==
 631                                         FIB_PROTOCOL_IP4), 1 /* is_add */ );
 632                                       }
 633                 ));
 634   vxlan_gpe_clear_output_feature_on_select_intfs ();
 635   return (0);
 636
 637 }
 638
 639 static clib_error_t *vxlan_gpe_set_ioam_transit_rewrite_command_fn
 640   (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd)
 641 {
 642   vxlan_gpe_ioam_main_t *hm = &vxlan_gpe_ioam_main;
 643   ip46_address_t dst_addr;
 644   u8 dst_addr_set = 0;
 645   u8 ipv4_set = 0;
 646   u8 ipv6_set = 0;
 647   u8 disable = 0;
 648   clib_error_t *rv = 0;
 649   u32 outer_fib_index = 0;
 650   while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
 651     {
 652       if (unformat (input, "dst-ip %U", unformat_ip4_address, &dst_addr.ip4))
 653         {
 654           dst_addr_set = 1;
 655           ipv4_set = 1;
 656         }
 657       else
 658         if (unformat
 659             (input, "dst-ip %U", unformat_ip6_address, &dst_addr.ip6))
 660         {
 661           dst_addr_set = 1;
 662           ipv6_set = 1;
 663         }
 664       else if (unformat (input, "outer-fib-index %d", &outer_fib_index))
 665         {
 666         }
 667
 668       else if (unformat (input, "disable"))
 669         disable = 1;
 670       else
 671         break;
 672     }
 673
 674   if (dst_addr_set == 0)
 675     return clib_error_return (0, "tunnel destination address not specified");
 676   if (ipv4_set && ipv6_set)
 677     return clib_error_return (0, "both IPv4 and IPv6 addresses specified");
 678   if (!disable)
 679     {
 680       vxlan_gpe_enable_disable_ioam_for_dest (hm->vlib_main,
 681                                               dst_addr, outer_fib_index,
 682                                               ipv4_set, 1);
 683     }
 684   else
 685     {
 686       vxlan_gpe_ioam_disable_for_dest
 687         (vm, dst_addr, outer_fib_index, ipv4_set);
 688     }
 689   return rv;
 690 }
 691
 692        /* *INDENT-OFF* */
 693 VLIB_CLI_COMMAND (vxlan_gpe_set_ioam_transit_rewrite_cmd, static) = {
 694   .path = "set vxlan-gpe-ioam-transit",
 695   .short_help = "set vxlan-gpe-ioam-transit dst-ip <dst_ip> [outer-fib-index <outer_fib_index>] [disable]",
 696   .function = vxlan_gpe_set_ioam_transit_rewrite_command_fn,
 697 };
 698 /* *INDENT-ON* */
 699
 700 clib_error_t *clear_vxlan_gpe_ioam_rewrite_command_fn
 701   (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd)
 702 {
 703   return (vxlan_gpe_ioam_disable (0, 0, 0));
 704 }
 705
 706 /* *INDENT-OFF* */
 707 VLIB_CLI_COMMAND (vxlan_gpe_clear_ioam_flags_cmd, static) =
 708 {
 709 .path = "clear vxlan-gpe-ioam rewrite",
 710 .short_help = "clear vxlan-gpe-ioam rewrite",
 711 .function = clear_vxlan_gpe_ioam_rewrite_command_fn,
 712 };
 713 /* *INDENT-ON* */
 714
 715
 716 /**
 717  * Function definition to backwalk a FIB node
 718  */
 719 static fib_node_back_walk_rc_t
 720 vxlan_gpe_ioam_back_walk (fib_node_t * node, fib_node_back_walk_ctx_t * ctx)
 721 {
 722   vxlan_gpe_refresh_output_feature_on_all_dest ();
 723   return (FIB_NODE_BACK_WALK_CONTINUE);
 724 }
 725
 726 /**
 727  * Function definition to get a FIB node from its index
 728  */
 729 static fib_node_t *
 730 vxlan_gpe_ioam_fib_node_get (fib_node_index_t index)
 731 {
 732   vxlan_gpe_ioam_main_t *hm = &vxlan_gpe_ioam_main;
 733   return (&hm->node);
 734 }
 735
 736 /**
 737  * Function definition to inform the FIB node that its last lock has gone.
 738  */
 739 static void
 740 vxlan_gpe_ioam_last_lock_gone (fib_node_t * node)
 741 {
 742   ASSERT (0);
 743 }
 744
 745
 746 /*
 747  * Virtual function table registered by MPLS GRE tunnels
 748  * for participation in the FIB object graph.
 749  */
 750 const static fib_node_vft_t vxlan_gpe_ioam_vft = {
 751   .fnv_get = vxlan_gpe_ioam_fib_node_get,
 752   .fnv_last_lock = vxlan_gpe_ioam_last_lock_gone,
 753   .fnv_back_walk = vxlan_gpe_ioam_back_walk,
 754 };
 755
 756 void
 757 vxlan_gpe_ioam_interface_init (void)
 758 {
 759   vxlan_gpe_ioam_main_t *hm = &vxlan_gpe_ioam_main;
 760   hm->fib_entry_type = fib_node_register_new_type (&vxlan_gpe_ioam_vft);
 761   return;
 762 }
 763
 764 /*
 765  * fd.io coding-style-patch-verification: ON
 766  *
 767  * Local Variables:
 768  * eval: (c-set-style "gnu")
 769  * End:
 770  */