bgpd/bgp_bfd.c

   1 /**
   2  * bgp_bfd.c: BGP BFD handling routines
   3  *
   4  * @copyright Copyright (C) 2015 Cumulus Networks, Inc.
   5  *
   6  * This file is part of GNU Zebra.
   7  *
   8  * GNU Zebra is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU General Public License as published by the
  10  * Free Software Foundation; either version 2, or (at your option) any
  11  * later version.
  12  *
  13  * GNU Zebra is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with GNU Zebra; see the file COPYING.  If not, write to the Free
  20  * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  21  * 02111-1307, USA.
  22  */
  23
  24 #include <zebra.h>
  25
  26 #include "command.h"
  27 #include "linklist.h"
  28 #include "memory.h"
  29 #include "prefix.h"
  30 #include "thread.h"
  31 #include "buffer.h"
  32 #include "stream.h"
  33 #include "zclient.h"
  34 #include "vty.h"
  35 #include "bfd.h"
  36 #include "lib/json.h"
  37 #include "bgpd/bgpd.h"
  38 #include "bgp_fsm.h"
  39 #include "bgpd/bgp_bfd.h"
  40 #include "bgpd/bgp_debug.h"
  41 #include "bgpd/bgp_vty.h"
  42
  43 extern struct zclient *zclient;
  44
  45 /*
  46  * bgp_bfd_peer_group2peer_copy - Copy the BFD information from peer group template
  47  *                                to peer.
  48  */
  49 void
  50 bgp_bfd_peer_group2peer_copy(struct peer *conf, struct peer *peer)
  51 {
  52   struct bfd_info *bfd_info;
  53   struct bfd_info *conf_bfd_info;
  54
  55   if (!conf->bfd_info)
  56     return;
  57
  58   conf_bfd_info = (struct bfd_info *)conf->bfd_info;
  59   if (!peer->bfd_info)
  60     peer->bfd_info = bfd_info_create();
  61
  62   bfd_info = (struct bfd_info *)peer->bfd_info;
  63
  64   /* Copy BFD parameter values */
  65   bfd_info->required_min_rx = conf_bfd_info->required_min_rx;
  66   bfd_info->desired_min_tx = conf_bfd_info->desired_min_tx;
  67   bfd_info->detect_mult = conf_bfd_info->detect_mult;
  68   bfd_info->type = conf_bfd_info->type;
  69 }
  70
  71 /*
  72  * bgp_bfd_is_peer_multihop - returns whether BFD peer is multi-hop or single hop.
  73  */
  74 static int
  75 bgp_bfd_is_peer_multihop(struct peer *peer)
  76 {
  77   struct bfd_info *bfd_info;
  78
  79   bfd_info = (struct bfd_info *)peer->bfd_info;
  80
  81   if (!bfd_info)
  82     return 0;
  83
  84   if((bfd_info->type == BFD_TYPE_MULTIHOP) ||
  85       ((peer->sort == BGP_PEER_IBGP) && !peer->shared_network) ||
  86       is_ebgp_multihop_configured(peer))
  87     return 1;
  88   else
  89     return 0;
  90 }
  91
  92 /*
  93  * bgp_bfd_peer_sendmsg - Format and send a Peer register/Unregister
  94  *                        command to Zebra to be forwarded to BFD
  95  */
  96 static void
  97 bgp_bfd_peer_sendmsg (struct peer *peer, int command)
  98 {
  99   struct bfd_info *bfd_info;
 100   vrf_id_t vrf_id = VRF_DEFAULT;
 101   int multihop;
 102
 103   bfd_info = (struct bfd_info *)peer->bfd_info;
 104
 105   if (peer->bgp && (peer->bgp->inst_type == BGP_INSTANCE_TYPE_VRF))
 106     vrf_id = peer->bgp->vrf_id;
 107
 108   if (command == ZEBRA_BFD_DEST_DEREGISTER)
 109     {
 110       multihop = CHECK_FLAG(bfd_info->flags, BFD_FLAG_BFD_TYPE_MULTIHOP);
 111       UNSET_FLAG(bfd_info->flags, BFD_FLAG_BFD_TYPE_MULTIHOP);
 112     }
 113   else
 114     {
 115       multihop = bgp_bfd_is_peer_multihop(peer);
 116       if ((command == ZEBRA_BFD_DEST_REGISTER) && multihop)
 117         SET_FLAG(bfd_info->flags, BFD_FLAG_BFD_TYPE_MULTIHOP);
 118     }
 119
 120   if (peer->su.sa.sa_family == AF_INET)
 121     bfd_peer_sendmsg (zclient, bfd_info, AF_INET,
 122                       &peer->su.sin.sin_addr,
 123                       (peer->su_local) ? &peer->su_local->sin.sin_addr : NULL,
 124                       (peer->nexthop.ifp) ? peer->nexthop.ifp->name : NULL,
 125                       peer->ttl, multihop, command, 1, vrf_id);
 126   else if (peer->su.sa.sa_family == AF_INET6)
 127     bfd_peer_sendmsg (zclient, bfd_info, AF_INET6,
 128                       &peer->su.sin6.sin6_addr,
 129                       (peer->su_local) ? &peer->su_local->sin6.sin6_addr : NULL,
 130                       (peer->nexthop.ifp) ? peer->nexthop.ifp->name : NULL,
 131                       peer->ttl, multihop, command, 1, vrf_id);
 132 }
 133
 134 /*
 135  * bgp_bfd_register_peer - register a peer with BFD through zebra
 136  *                         for monitoring the peer rechahability.
 137  */
 138 void
 139 bgp_bfd_register_peer (struct peer *peer)
 140 {
 141   struct bfd_info *bfd_info;
 142
 143   if (!peer->bfd_info)
 144     return;
 145   bfd_info = (struct bfd_info *)peer->bfd_info;
 146
 147   /* Check if BFD is enabled and peer has already been registered with BFD */
 148   if (CHECK_FLAG(bfd_info->flags, BFD_FLAG_BFD_REG))
 149     return;
 150
 151   bgp_bfd_peer_sendmsg(peer, ZEBRA_BFD_DEST_REGISTER);
 152 }
 153
 154 /**
 155  * bgp_bfd_deregister_peer - deregister a peer with BFD through zebra
 156  *                           for stopping the monitoring of the peer
 157  *                           rechahability.
 158  */
 159 void
 160 bgp_bfd_deregister_peer (struct peer *peer)
 161 {
 162   struct bfd_info *bfd_info;
 163
 164   if (!peer->bfd_info)
 165     return;
 166   bfd_info = (struct bfd_info *)peer->bfd_info;
 167
 168   /* Check if BFD is eanbled and peer has not been registered */
 169   if (!CHECK_FLAG(bfd_info->flags, BFD_FLAG_BFD_REG))
 170     return;
 171
 172   bgp_bfd_peer_sendmsg(peer, ZEBRA_BFD_DEST_DEREGISTER);
 173 }
 174
 175 /*
 176  * bgp_bfd_update_peer - update peer with BFD with new BFD paramters
 177  *                       through zebra.
 178  */
 179 static void
 180 bgp_bfd_update_peer (struct peer *peer)
 181 {
 182   struct bfd_info *bfd_info;
 183
 184   if (!peer->bfd_info)
 185     return;
 186   bfd_info = (struct bfd_info *)peer->bfd_info;
 187
 188   /* Check if the peer has been registered with BFD*/
 189   if (!CHECK_FLAG(bfd_info->flags, BFD_FLAG_BFD_REG))
 190     return;
 191
 192   bgp_bfd_peer_sendmsg(peer, ZEBRA_BFD_DEST_UPDATE);
 193 }
 194
 195 /*
 196  * bgp_bfd_update_type - update session type with BFD through zebra.
 197  */
 198 static void
 199 bgp_bfd_update_type (struct peer *peer)
 200 {
 201   struct bfd_info *bfd_info;
 202   int multihop;
 203
 204   if (!peer->bfd_info)
 205     return;
 206   bfd_info = (struct bfd_info *)peer->bfd_info;
 207
 208   /* Check if the peer has been registered with BFD*/
 209   if (!CHECK_FLAG(bfd_info->flags, BFD_FLAG_BFD_REG))
 210     return;
 211
 212   if (bfd_info->type == BFD_TYPE_NOT_CONFIGURED)
 213     {
 214       multihop = bgp_bfd_is_peer_multihop(peer);
 215       if ((multihop && !CHECK_FLAG(bfd_info->flags, BFD_FLAG_BFD_TYPE_MULTIHOP)) ||
 216             (!multihop && CHECK_FLAG(bfd_info->flags, BFD_FLAG_BFD_TYPE_MULTIHOP)))
 217         {
 218           bgp_bfd_peer_sendmsg(peer, ZEBRA_BFD_DEST_DEREGISTER);
 219           bgp_bfd_peer_sendmsg(peer, ZEBRA_BFD_DEST_REGISTER);
 220         }
 221     }
 222   else
 223     {
 224       if ((bfd_info->type == BFD_TYPE_MULTIHOP &&
 225             !CHECK_FLAG(bfd_info->flags, BFD_FLAG_BFD_TYPE_MULTIHOP)) ||
 226           (bfd_info->type == BFD_TYPE_SINGLEHOP &&
 227             CHECK_FLAG(bfd_info->flags, BFD_FLAG_BFD_TYPE_MULTIHOP)))
 228         {
 229           bgp_bfd_peer_sendmsg(peer, ZEBRA_BFD_DEST_DEREGISTER);
 230           bgp_bfd_peer_sendmsg(peer, ZEBRA_BFD_DEST_REGISTER);
 231         }
 232     }
 233 }
 234
 235 /*
 236  * bgp_bfd_dest_replay - Replay all the peers that have BFD enabled
 237  *                       to zebra
 238  */
 239 static int
 240 bgp_bfd_dest_replay (int command, struct zclient *client, zebra_size_t length,
 241                      vrf_id_t vrf_id)
 242 {
 243   struct listnode *mnode, *node, *nnode;
 244   struct bgp *bgp;
 245   struct peer *peer;
 246
 247   if (BGP_DEBUG (zebra, ZEBRA))
 248     zlog_debug("Zebra: BFD Dest replay request");
 249
 250   /* Send the client registration */
 251   bfd_client_sendmsg(zclient, ZEBRA_BFD_CLIENT_REGISTER);
 252
 253   /* Replay the peer, if BFD is enabled in BGP */
 254
 255   for (ALL_LIST_ELEMENTS_RO (bm->bgp, mnode, bgp))
 256     for (ALL_LIST_ELEMENTS (bgp->peer, node, nnode, peer))
 257       {
 258         bgp_bfd_update_peer(peer);
 259       }
 260
 261   return 0;
 262 }
 263
 264 /*
 265  * bgp_bfd_peer_status_update - Update the BFD status if it has changed. Bring
 266  *                              down the peer if the BFD session went down from  *                              up.
 267  */
 268 static void
 269 bgp_bfd_peer_status_update (struct peer *peer, int status)
 270 {
 271   struct bfd_info *bfd_info;
 272   int old_status;
 273
 274   bfd_info = (struct bfd_info *)peer->bfd_info;
 275
 276   if (bfd_info->status == status)
 277     return;
 278
 279   old_status = bfd_info->status;
 280   bfd_info->status = status;
 281   bfd_info->last_update = bgp_clock();
 282
 283   if ((status == BFD_STATUS_DOWN) && (old_status == BFD_STATUS_UP))
 284     {
 285       peer->last_reset = PEER_DOWN_BFD_DOWN;
 286       BGP_EVENT_ADD (peer, BGP_Stop);
 287     }
 288 }
 289
 290 /*
 291  * bgp_bfd_dest_update - Find the peer for which the BFD status
 292  *                       has changed and bring down the peer
 293  *                       connectivity if the BFD session went down.
 294  */
 295 static int
 296 bgp_bfd_dest_update (int command, struct zclient *zclient,
 297                              zebra_size_t length, vrf_id_t vrf_id)
 298 {
 299   struct interface *ifp;
 300   struct prefix dp;
 301   struct prefix sp;
 302   int status;
 303
 304   ifp = bfd_get_peer_info (zclient->ibuf, &dp, &sp, &status, vrf_id);
 305
 306   if (BGP_DEBUG (zebra, ZEBRA))
 307     {
 308       char buf[2][PREFIX2STR_BUFFER];
 309       prefix2str(&dp, buf[0], sizeof(buf[0]));
 310       if (ifp)
 311         {
 312           zlog_debug("Zebra: interface %s bfd destination %s %s",
 313                       ifp->name, buf[0], bfd_get_status_str(status));
 314         }
 315       else
 316         {
 317           prefix2str(&sp, buf[1], sizeof(buf[1]));
 318           zlog_debug("Zebra: source %s bfd destination %s %s",
 319                       buf[1], buf[0], bfd_get_status_str(status));
 320         }
 321     }
 322
 323   /* Bring the peer down if BFD is enabled in BGP */
 324   {
 325     struct listnode *mnode, *node, *nnode;
 326     struct bgp *bgp;
 327     struct peer *peer;
 328
 329     for (ALL_LIST_ELEMENTS_RO (bm->bgp, mnode, bgp))
 330       for (ALL_LIST_ELEMENTS (bgp->peer, node, nnode, peer))
 331         {
 332           if (!peer->bfd_info)
 333             continue;
 334
 335           if ((dp.family == AF_INET) && (peer->su.sa.sa_family == AF_INET))
 336             {
 337               if (dp.u.prefix4.s_addr != peer->su.sin.sin_addr.s_addr)
 338                 continue;
 339             }
 340 #ifdef HAVE_IPV6
 341           else if ((dp.family == AF_INET6) &&
 342                     (peer->su.sa.sa_family == AF_INET6))
 343             {
 344               if (memcmp(&dp.u.prefix6, &peer->su.sin6.sin6_addr,
 345                           sizeof (struct in6_addr)))
 346                 continue;
 347             }
 348 #endif
 349           else
 350             continue;
 351
 352           if (ifp && (ifp == peer->nexthop.ifp))
 353             {
 354               bgp_bfd_peer_status_update(peer, status);
 355             }
 356           else
 357             {
 358               if (!peer->su_local)
 359                 continue;
 360
 361               if ((sp.family == AF_INET) &&
 362                     (peer->su_local->sa.sa_family == AF_INET))
 363                 {
 364                   if (sp.u.prefix4.s_addr != peer->su_local->sin.sin_addr.s_addr)
 365                     continue;
 366                 }
 367 #ifdef HAVE_IPV6
 368               else if ((sp.family == AF_INET6) &&
 369                         (peer->su_local->sa.sa_family == AF_INET6))
 370                 {
 371                   if (memcmp(&sp.u.prefix6, &peer->su_local->sin6.sin6_addr,
 372                               sizeof (struct in6_addr)))
 373                     continue;
 374                 }
 375 #endif
 376               else
 377                 continue;
 378
 379               if ((vrf_id != VRF_DEFAULT) && (peer->bgp->vrf_id != vrf_id))
 380                 continue;
 381
 382               bgp_bfd_peer_status_update(peer, status);
 383             }
 384         }
 385   }
 386
 387   return 0;
 388 }
 389
 390 /*
 391  * bgp_bfd_peer_param_set - Set the configured BFD paramter values for peer.
 392  */
 393 static int
 394 bgp_bfd_peer_param_set (struct peer *peer, u_int32_t min_rx, u_int32_t min_tx,
 395                          u_int8_t detect_mult, int defaults)
 396 {
 397   struct peer_group *group;
 398   struct listnode *node, *nnode;
 399   int command = 0;
 400
 401   bfd_set_param((struct bfd_info **)&(peer->bfd_info), min_rx, min_tx,
 402                 detect_mult, defaults, &command);
 403
 404   if (CHECK_FLAG (peer->sflags, PEER_STATUS_GROUP))
 405     {
 406       group = peer->group;
 407       for (ALL_LIST_ELEMENTS (group->peer, node, nnode, peer))
 408         {
 409           command = 0;
 410           bfd_set_param((struct bfd_info **)&(peer->bfd_info), min_rx, min_tx,
 411                         detect_mult, defaults, &command);
 412
 413           if ((peer->status == Established) &&
 414               (command == ZEBRA_BFD_DEST_REGISTER))
 415             bgp_bfd_register_peer(peer);
 416           else if (command == ZEBRA_BFD_DEST_UPDATE)
 417             bgp_bfd_update_peer(peer);
 418         }
 419     }
 420   else
 421     {
 422       if ((peer->status == Established) &&
 423           (command == ZEBRA_BFD_DEST_REGISTER))
 424         bgp_bfd_register_peer(peer);
 425       else if (command == ZEBRA_BFD_DEST_UPDATE)
 426         bgp_bfd_update_peer(peer);
 427     }
 428   return 0;
 429 }
 430
 431 /*
 432  * bgp_bfd_peer_param_unset - Delete the configured BFD paramter values for peer.
 433  */
 434 static int
 435 bgp_bfd_peer_param_unset (struct peer *peer)
 436 {
 437   struct peer_group *group;
 438   struct listnode *node, *nnode;
 439
 440   if (!peer->bfd_info)
 441     return 0;
 442
 443   if (CHECK_FLAG (peer->sflags, PEER_STATUS_GROUP))
 444     {
 445       bfd_info_free(&(peer->bfd_info));
 446       group = peer->group;
 447       for (ALL_LIST_ELEMENTS (group->peer, node, nnode, peer))
 448         {
 449           bgp_bfd_deregister_peer(peer);
 450           bfd_info_free(&(peer->bfd_info));
 451         }
 452     }
 453   else
 454     {
 455       bgp_bfd_deregister_peer(peer);
 456       bfd_info_free(&(peer->bfd_info));
 457     }
 458   return 0;
 459 }
 460
 461 /*
 462  * bgp_bfd_peer_param_type_set - set the BFD session type (multihop or singlehop)
 463  */
 464 static int
 465 bgp_bfd_peer_param_type_set (struct peer *peer, enum bfd_sess_type type)
 466 {
 467   struct peer_group *group;
 468   struct listnode *node, *nnode;
 469   int command = 0;
 470   struct bfd_info *bfd_info;
 471
 472   if (!peer->bfd_info)
 473     bfd_set_param((struct bfd_info **)&(peer->bfd_info), BFD_DEF_MIN_RX,
 474                     BFD_DEF_MIN_TX, BFD_DEF_DETECT_MULT, 1, &command);
 475
 476   bfd_info = (struct bfd_info *)peer->bfd_info;
 477   bfd_info->type = type;
 478
 479   if (CHECK_FLAG (peer->sflags, PEER_STATUS_GROUP))
 480     {
 481       group = peer->group;
 482       for (ALL_LIST_ELEMENTS (group->peer, node, nnode, peer))
 483         {
 484           command = 0;
 485           if (!peer->bfd_info)
 486             bfd_set_param((struct bfd_info **)&(peer->bfd_info),
 487                            BFD_DEF_MIN_RX, BFD_DEF_MIN_TX,
 488                            BFD_DEF_DETECT_MULT, 1, &command);
 489
 490           bfd_info = (struct bfd_info *)peer->bfd_info;
 491           bfd_info->type = type;
 492
 493           if (peer->status == Established)
 494             {
 495               if (command == ZEBRA_BFD_DEST_REGISTER)
 496                 bgp_bfd_register_peer(peer);
 497               else
 498                 bgp_bfd_update_type(peer);
 499             }
 500         }
 501     }
 502   else
 503     {
 504       if (peer->status == Established)
 505         {
 506           if (command == ZEBRA_BFD_DEST_REGISTER)
 507             bgp_bfd_register_peer(peer);
 508           else
 509             bgp_bfd_update_type(peer);
 510         }
 511     }
 512
 513   return 0;
 514 }
 515
 516 /*
 517  * bgp_bfd_peer_config_write - Write the peer BFD configuration.
 518  */
 519 void
 520 bgp_bfd_peer_config_write(struct vty *vty, struct peer *peer, char *addr)
 521 {
 522   struct bfd_info *bfd_info;
 523
 524   if (!peer->bfd_info)
 525     return;
 526
 527   bfd_info = (struct bfd_info *)peer->bfd_info;
 528
 529   if (CHECK_FLAG (bfd_info->flags, BFD_FLAG_PARAM_CFG))
 530     vty_out (vty, " neighbor %s bfd %d %d %d%s", addr,
 531       bfd_info->detect_mult, bfd_info->required_min_rx,
 532       bfd_info->desired_min_tx, VTY_NEWLINE);
 533
 534   if (bfd_info->type != BFD_TYPE_NOT_CONFIGURED)
 535     vty_out (vty, " neighbor %s bfd %s%s", addr,
 536       (bfd_info->type == BFD_TYPE_MULTIHOP) ? "multihop" : "singlehop",
 537       VTY_NEWLINE);
 538
 539   if (!CHECK_FLAG (bfd_info->flags, BFD_FLAG_PARAM_CFG) &&
 540         (bfd_info->type == BFD_TYPE_NOT_CONFIGURED))
 541     vty_out (vty, " neighbor %s bfd%s", addr, VTY_NEWLINE);
 542 }
 543
 544 /*
 545  * bgp_bfd_show_info - Show the peer BFD information.
 546  */
 547 void
 548 bgp_bfd_show_info(struct vty *vty, struct peer *peer, u_char use_json, json_object *json_neigh)
 549 {
 550   bfd_show_info(vty, (struct bfd_info *)peer->bfd_info,
 551                 bgp_bfd_is_peer_multihop(peer), 0, use_json, json_neigh);
 552 }
 553
 554 DEFUN (neighbor_bfd,
 555        neighbor_bfd_cmd,
 556        NEIGHBOR_CMD2 "bfd",
 557        NEIGHBOR_STR
 558        NEIGHBOR_ADDR_STR2
 559        "Enables BFD support\n")
 560 {
 561   struct peer *peer;
 562   int ret;
 563
 564   peer = peer_and_group_lookup_vty (vty, argv[0]);
 565   if (! peer)
 566     return CMD_WARNING;
 567
 568   ret = bgp_bfd_peer_param_set (peer, BFD_DEF_MIN_RX, BFD_DEF_MIN_TX,
 569                                   BFD_DEF_DETECT_MULT, 1);
 570   if (ret != 0)
 571     return bgp_vty_return (vty, ret);
 572
 573   return CMD_SUCCESS;
 574
 575 }
 576
 577 DEFUN (neighbor_bfd_param,
 578        neighbor_bfd_param_cmd,
 579        NEIGHBOR_CMD2 "bfd " BFD_CMD_DETECT_MULT_RANGE BFD_CMD_MIN_RX_RANGE BFD_CMD_MIN_TX_RANGE,
 580        NEIGHBOR_STR
 581        NEIGHBOR_ADDR_STR2
 582        "Enables BFD support\n"
 583        "Detect Multiplier\n"
 584        "Required min receive interval\n"
 585        "Desired min transmit interval\n")
 586 {
 587   struct peer *peer;
 588   u_int32_t rx_val;
 589   u_int32_t tx_val;
 590   u_int8_t dm_val;
 591   int ret;
 592
 593   peer = peer_and_group_lookup_vty (vty, argv[0]);
 594   if (!peer)
 595     return CMD_WARNING;
 596
 597   if ((ret = bfd_validate_param (vty, argv[1], argv[2], argv[3], &dm_val,
 598                                  &rx_val, &tx_val)) != CMD_SUCCESS)
 599     return ret;
 600
 601   ret = bgp_bfd_peer_param_set (peer, rx_val, tx_val, dm_val, 0);
 602   if (ret != 0)
 603     return bgp_vty_return (vty, ret);
 604
 605   return CMD_SUCCESS;
 606
 607 }
 608
 609 DEFUN_HIDDEN (neighbor_bfd_type,
 610        neighbor_bfd_type_cmd,
 611        NEIGHBOR_CMD2 "bfd " BFD_CMD_TYPE,
 612        NEIGHBOR_STR
 613        NEIGHBOR_ADDR_STR2
 614        "Enables BFD support\n"
 615        "Session type\n")
 616 {
 617   struct peer *peer;
 618   enum bfd_sess_type type;
 619   int ret;
 620
 621   peer = peer_and_group_lookup_vty (vty, argv[0]);
 622   if (!peer)
 623     return CMD_WARNING;
 624
 625   if (!strcmp(argv[1], "singlehop"))
 626     type = BFD_TYPE_SINGLEHOP;
 627   else if (!strcmp(argv[1], "multihop"))
 628     type = BFD_TYPE_MULTIHOP;
 629   else
 630     return CMD_WARNING;
 631
 632   ret = bgp_bfd_peer_param_type_set (peer, type);
 633   if (ret != 0)
 634     return bgp_vty_return (vty, ret);
 635
 636   return CMD_SUCCESS;
 637 }
 638
 639 DEFUN (no_neighbor_bfd,
 640        no_neighbor_bfd_cmd,
 641        NO_NEIGHBOR_CMD2 "bfd",
 642        NO_STR
 643        NEIGHBOR_STR
 644        NEIGHBOR_ADDR_STR2
 645        "Disables BFD support\n")
 646 {
 647   struct peer *peer;
 648   int ret;
 649
 650   peer = peer_and_group_lookup_vty (vty, argv[0]);
 651   if (! peer)
 652     return CMD_WARNING;
 653
 654   ret = bgp_bfd_peer_param_unset(peer);
 655   if (ret != 0)
 656     return bgp_vty_return (vty, ret);
 657
 658   return CMD_SUCCESS;
 659 }
 660
 661 ALIAS (no_neighbor_bfd,
 662        no_neighbor_bfd_val_cmd,
 663        NO_NEIGHBOR_CMD2 "bfd " BFD_CMD_DETECT_MULT_RANGE BFD_CMD_MIN_RX_RANGE BFD_CMD_MIN_TX_RANGE,
 664        NO_STR
 665        NEIGHBOR_STR
 666        NEIGHBOR_ADDR_STR2
 667        "Disables BFD support\n"
 668        "Detect Multiplier\n"
 669        "Required min receive interval\n"
 670        "Desired min transmit interval\n")
 671
 672 DEFUN_HIDDEN (no_neighbor_bfd_type,
 673        no_neighbor_bfd_type_cmd,
 674        NO_NEIGHBOR_CMD2 "bfd " BFD_CMD_TYPE,
 675        NO_STR
 676        NEIGHBOR_STR
 677        NEIGHBOR_ADDR_STR2
 678        "Disables BFD support\n"
 679        "Session type\n")
 680 {
 681   struct peer *peer;
 682   int ret;
 683
 684   peer = peer_and_group_lookup_vty (vty, argv[0]);
 685   if (! peer)
 686     return CMD_WARNING;
 687
 688   if (!peer->bfd_info)
 689     return 0;
 690
 691   ret = bgp_bfd_peer_param_type_set(peer, BFD_TYPE_NOT_CONFIGURED);
 692   if (ret != 0)
 693     return bgp_vty_return (vty, ret);
 694
 695   return CMD_SUCCESS;
 696 }
 697
 698 void
 699 bgp_bfd_init(void)
 700 {
 701   /* Initialize BFD client functions */
 702   zclient->interface_bfd_dest_update = bgp_bfd_dest_update;
 703   zclient->bfd_dest_replay = bgp_bfd_dest_replay;
 704
 705   /* "neighbor bfd" commands. */
 706   install_element (BGP_NODE, &neighbor_bfd_cmd);
 707   install_element (BGP_NODE, &neighbor_bfd_param_cmd);
 708   install_element (BGP_NODE, &neighbor_bfd_type_cmd);
 709   install_element (BGP_NODE, &no_neighbor_bfd_cmd);
 710   install_element (BGP_NODE, &no_neighbor_bfd_val_cmd);
 711   install_element (BGP_NODE, &no_neighbor_bfd_type_cmd);
 712
 713   /* Send the client registration */
 714   bfd_client_sendmsg(zclient, ZEBRA_BFD_CLIENT_REGISTER);
 715 }