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c43ed2e4 DS |
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 | * | |
896014f4 DL |
18 | * You should have received a copy of the GNU General Public License along |
19 | * with this program; see the file COPYING; if not, write to the Free Software | |
20 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
c43ed2e4 DS |
21 | */ |
22 | ||
23 | #include <zebra.h> | |
24 | ||
25 | #include "command.h" | |
26 | #include "linklist.h" | |
27 | #include "memory.h" | |
28 | #include "prefix.h" | |
29 | #include "thread.h" | |
30 | #include "buffer.h" | |
31 | #include "stream.h" | |
32 | #include "zclient.h" | |
7f342629 | 33 | #include "bfd.h" |
856ca177 | 34 | #include "lib/json.h" |
039f3a34 DS |
35 | #include "filter.h" |
36 | ||
c43ed2e4 | 37 | #include "bgpd/bgpd.h" |
7f342629 | 38 | #include "bgp_fsm.h" |
c43ed2e4 DS |
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 | ||
c43ed2e4 | 45 | /* |
d62a17ae | 46 | * bgp_bfd_peer_group2peer_copy - Copy the BFD information from peer group |
47 | * template | |
c43ed2e4 DS |
48 | * to peer. |
49 | */ | |
d62a17ae | 50 | void bgp_bfd_peer_group2peer_copy(struct peer *conf, struct peer *peer) |
c43ed2e4 | 51 | { |
d62a17ae | 52 | struct bfd_info *bfd_info; |
53 | struct bfd_info *conf_bfd_info; | |
7f342629 | 54 | |
d62a17ae | 55 | if (!conf->bfd_info) |
56 | return; | |
7f342629 | 57 | |
d62a17ae | 58 | conf_bfd_info = (struct bfd_info *)conf->bfd_info; |
59 | if (!peer->bfd_info) | |
60 | peer->bfd_info = bfd_info_create(); | |
c43ed2e4 | 61 | |
d62a17ae | 62 | bfd_info = (struct bfd_info *)peer->bfd_info; |
c43ed2e4 | 63 | |
d62a17ae | 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; | |
c43ed2e4 DS |
69 | } |
70 | ||
71 | /* | |
d62a17ae | 72 | * bgp_bfd_is_peer_multihop - returns whether BFD peer is multi-hop or single |
73 | * hop. | |
c43ed2e4 | 74 | */ |
d62a17ae | 75 | int bgp_bfd_is_peer_multihop(struct peer *peer) |
c43ed2e4 | 76 | { |
d62a17ae | 77 | struct bfd_info *bfd_info; |
986aa00f | 78 | |
d62a17ae | 79 | bfd_info = (struct bfd_info *)peer->bfd_info; |
986aa00f | 80 | |
d62a17ae | 81 | if (!bfd_info) |
82 | return 0; | |
986aa00f | 83 | |
d62a17ae | 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; | |
c43ed2e4 DS |
90 | } |
91 | ||
92 | /* | |
7f342629 DS |
93 | * bgp_bfd_peer_sendmsg - Format and send a Peer register/Unregister |
94 | * command to Zebra to be forwarded to BFD | |
c43ed2e4 | 95 | */ |
d62a17ae | 96 | static void bgp_bfd_peer_sendmsg(struct peer *peer, int command) |
c43ed2e4 | 97 | { |
d62a17ae | 98 | struct bfd_info *bfd_info; |
99 | vrf_id_t vrf_id = VRF_DEFAULT; | |
100 | int multihop; | |
101 | ||
102 | bfd_info = (struct bfd_info *)peer->bfd_info; | |
103 | ||
5410015a | 104 | if (peer->bgp->inst_type == BGP_INSTANCE_TYPE_VRF) |
d62a17ae | 105 | vrf_id = peer->bgp->vrf_id; |
106 | ||
107 | if (command == ZEBRA_BFD_DEST_DEREGISTER) { | |
108 | multihop = | |
109 | CHECK_FLAG(bfd_info->flags, BFD_FLAG_BFD_TYPE_MULTIHOP); | |
110 | UNSET_FLAG(bfd_info->flags, BFD_FLAG_BFD_TYPE_MULTIHOP); | |
111 | } else { | |
112 | multihop = bgp_bfd_is_peer_multihop(peer); | |
113 | if ((command == ZEBRA_BFD_DEST_REGISTER) && multihop) | |
114 | SET_FLAG(bfd_info->flags, BFD_FLAG_BFD_TYPE_MULTIHOP); | |
115 | } | |
116 | ||
117 | if (peer->su.sa.sa_family == AF_INET) | |
118 | bfd_peer_sendmsg( | |
119 | zclient, bfd_info, AF_INET, &peer->su.sin.sin_addr, | |
120 | (peer->su_local) ? &peer->su_local->sin.sin_addr : NULL, | |
121 | (peer->nexthop.ifp) ? peer->nexthop.ifp->name : NULL, | |
122 | peer->ttl, multihop, command, 1, vrf_id); | |
123 | else if (peer->su.sa.sa_family == AF_INET6) | |
124 | bfd_peer_sendmsg( | |
125 | zclient, bfd_info, AF_INET6, &peer->su.sin6.sin6_addr, | |
126 | (peer->su_local) ? &peer->su_local->sin6.sin6_addr | |
127 | : NULL, | |
128 | (peer->nexthop.ifp) ? peer->nexthop.ifp->name : NULL, | |
129 | peer->ttl, multihop, command, 1, vrf_id); | |
c43ed2e4 DS |
130 | } |
131 | ||
132 | /* | |
133 | * bgp_bfd_register_peer - register a peer with BFD through zebra | |
134 | * for monitoring the peer rechahability. | |
135 | */ | |
d62a17ae | 136 | void bgp_bfd_register_peer(struct peer *peer) |
c43ed2e4 | 137 | { |
d62a17ae | 138 | struct bfd_info *bfd_info; |
c43ed2e4 | 139 | |
d62a17ae | 140 | if (!peer->bfd_info) |
141 | return; | |
142 | bfd_info = (struct bfd_info *)peer->bfd_info; | |
c43ed2e4 | 143 | |
d62a17ae | 144 | /* Check if BFD is enabled and peer has already been registered with BFD |
145 | */ | |
146 | if (CHECK_FLAG(bfd_info->flags, BFD_FLAG_BFD_REG)) | |
147 | return; | |
c43ed2e4 | 148 | |
d62a17ae | 149 | bgp_bfd_peer_sendmsg(peer, ZEBRA_BFD_DEST_REGISTER); |
c43ed2e4 DS |
150 | } |
151 | ||
152 | /** | |
153 | * bgp_bfd_deregister_peer - deregister a peer with BFD through zebra | |
154 | * for stopping the monitoring of the peer | |
155 | * rechahability. | |
156 | */ | |
d62a17ae | 157 | void bgp_bfd_deregister_peer(struct peer *peer) |
c43ed2e4 | 158 | { |
d62a17ae | 159 | struct bfd_info *bfd_info; |
c43ed2e4 | 160 | |
d62a17ae | 161 | if (!peer->bfd_info) |
162 | return; | |
163 | bfd_info = (struct bfd_info *)peer->bfd_info; | |
c43ed2e4 | 164 | |
d62a17ae | 165 | /* Check if BFD is eanbled and peer has not been registered */ |
166 | if (!CHECK_FLAG(bfd_info->flags, BFD_FLAG_BFD_REG)) | |
167 | return; | |
c43ed2e4 | 168 | |
d62a17ae | 169 | bfd_info->status = BFD_STATUS_DOWN; |
170 | bfd_info->last_update = bgp_clock(); | |
5c940836 | 171 | |
d62a17ae | 172 | bgp_bfd_peer_sendmsg(peer, ZEBRA_BFD_DEST_DEREGISTER); |
c43ed2e4 DS |
173 | } |
174 | ||
175 | /* | |
176 | * bgp_bfd_update_peer - update peer with BFD with new BFD paramters | |
177 | * through zebra. | |
178 | */ | |
d62a17ae | 179 | static void bgp_bfd_update_peer(struct peer *peer) |
c43ed2e4 | 180 | { |
d62a17ae | 181 | struct bfd_info *bfd_info; |
c43ed2e4 | 182 | |
d62a17ae | 183 | if (!peer->bfd_info) |
184 | return; | |
185 | bfd_info = (struct bfd_info *)peer->bfd_info; | |
c43ed2e4 | 186 | |
d62a17ae | 187 | /* Check if the peer has been registered with BFD*/ |
188 | if (!CHECK_FLAG(bfd_info->flags, BFD_FLAG_BFD_REG)) | |
189 | return; | |
c43ed2e4 | 190 | |
d62a17ae | 191 | bgp_bfd_peer_sendmsg(peer, ZEBRA_BFD_DEST_UPDATE); |
c43ed2e4 DS |
192 | } |
193 | ||
986aa00f | 194 | /* |
195 | * bgp_bfd_update_type - update session type with BFD through zebra. | |
196 | */ | |
d62a17ae | 197 | static void bgp_bfd_update_type(struct peer *peer) |
986aa00f | 198 | { |
d62a17ae | 199 | struct bfd_info *bfd_info; |
200 | int multihop; | |
201 | ||
202 | if (!peer->bfd_info) | |
203 | return; | |
204 | bfd_info = (struct bfd_info *)peer->bfd_info; | |
205 | ||
206 | /* Check if the peer has been registered with BFD*/ | |
207 | if (!CHECK_FLAG(bfd_info->flags, BFD_FLAG_BFD_REG)) | |
208 | return; | |
209 | ||
210 | if (bfd_info->type == BFD_TYPE_NOT_CONFIGURED) { | |
211 | multihop = bgp_bfd_is_peer_multihop(peer); | |
212 | if ((multihop | |
213 | && !CHECK_FLAG(bfd_info->flags, | |
214 | BFD_FLAG_BFD_TYPE_MULTIHOP)) | |
9d303b37 DL |
215 | || (!multihop && CHECK_FLAG(bfd_info->flags, |
216 | BFD_FLAG_BFD_TYPE_MULTIHOP))) { | |
d62a17ae | 217 | bgp_bfd_peer_sendmsg(peer, ZEBRA_BFD_DEST_DEREGISTER); |
218 | bgp_bfd_peer_sendmsg(peer, ZEBRA_BFD_DEST_REGISTER); | |
219 | } | |
220 | } else { | |
221 | if ((bfd_info->type == BFD_TYPE_MULTIHOP | |
222 | && !CHECK_FLAG(bfd_info->flags, | |
223 | BFD_FLAG_BFD_TYPE_MULTIHOP)) | |
224 | || (bfd_info->type == BFD_TYPE_SINGLEHOP | |
225 | && CHECK_FLAG(bfd_info->flags, | |
226 | BFD_FLAG_BFD_TYPE_MULTIHOP))) { | |
227 | bgp_bfd_peer_sendmsg(peer, ZEBRA_BFD_DEST_DEREGISTER); | |
228 | bgp_bfd_peer_sendmsg(peer, ZEBRA_BFD_DEST_REGISTER); | |
229 | } | |
230 | } | |
986aa00f | 231 | } |
232 | ||
c43ed2e4 DS |
233 | /* |
234 | * bgp_bfd_dest_replay - Replay all the peers that have BFD enabled | |
235 | * to zebra | |
236 | */ | |
121f9dee | 237 | static int bgp_bfd_dest_replay(ZAPI_CALLBACK_ARGS) |
c43ed2e4 | 238 | { |
d62a17ae | 239 | struct listnode *mnode, *node, *nnode; |
240 | struct bgp *bgp; | |
241 | struct peer *peer; | |
c43ed2e4 | 242 | |
d62a17ae | 243 | if (BGP_DEBUG(zebra, ZEBRA)) |
244 | zlog_debug("Zebra: BFD Dest replay request"); | |
c43ed2e4 | 245 | |
d62a17ae | 246 | /* Send the client registration */ |
247 | bfd_client_sendmsg(zclient, ZEBRA_BFD_CLIENT_REGISTER); | |
055c4dfc | 248 | |
d62a17ae | 249 | /* Replay the peer, if BFD is enabled in BGP */ |
c43ed2e4 | 250 | |
d62a17ae | 251 | for (ALL_LIST_ELEMENTS_RO(bm->bgp, mnode, bgp)) |
252 | for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) { | |
253 | bgp_bfd_update_peer(peer); | |
254 | } | |
c43ed2e4 | 255 | |
d62a17ae | 256 | return 0; |
c43ed2e4 DS |
257 | } |
258 | ||
259 | /* | |
68fe91d6 | 260 | * bgp_bfd_peer_status_update - Update the BFD status if it has changed. Bring |
d62a17ae | 261 | * down the peer if the BFD session went down from |
262 | * * up. | |
68fe91d6 | 263 | */ |
d62a17ae | 264 | static void bgp_bfd_peer_status_update(struct peer *peer, int status) |
68fe91d6 | 265 | { |
d62a17ae | 266 | struct bfd_info *bfd_info; |
267 | int old_status; | |
68fe91d6 | 268 | |
d62a17ae | 269 | bfd_info = (struct bfd_info *)peer->bfd_info; |
68fe91d6 | 270 | |
d62a17ae | 271 | if (bfd_info->status == status) |
272 | return; | |
68fe91d6 | 273 | |
d62a17ae | 274 | old_status = bfd_info->status; |
275 | bfd_info->status = status; | |
276 | bfd_info->last_update = bgp_clock(); | |
68fe91d6 | 277 | |
37bb7aca PG |
278 | if (status != old_status) { |
279 | if (BGP_DEBUG(neighbor_events, NEIGHBOR_EVENTS)) | |
280 | zlog_debug("[%s]: BFD %s", peer->host, | |
281 | bfd_get_status_str(status)); | |
282 | } | |
d62a17ae | 283 | if ((status == BFD_STATUS_DOWN) && (old_status == BFD_STATUS_UP)) { |
284 | peer->last_reset = PEER_DOWN_BFD_DOWN; | |
285 | BGP_EVENT_ADD(peer, BGP_Stop); | |
286 | } | |
51728519 PG |
287 | if ((status == BFD_STATUS_UP) && (old_status == BFD_STATUS_DOWN) |
288 | && peer->status != Established) { | |
fc04a677 PG |
289 | if (!BGP_PEER_START_SUPPRESSED(peer)) { |
290 | bgp_fsm_event_update(peer, 1); | |
51728519 | 291 | BGP_EVENT_ADD(peer, BGP_Start); |
fc04a677 | 292 | } |
51728519 | 293 | } |
68fe91d6 | 294 | } |
295 | ||
296 | /* | |
297 | * bgp_bfd_dest_update - Find the peer for which the BFD status | |
298 | * has changed and bring down the peer | |
299 | * connectivity if the BFD session went down. | |
c43ed2e4 | 300 | */ |
121f9dee | 301 | static int bgp_bfd_dest_update(ZAPI_CALLBACK_ARGS) |
c43ed2e4 | 302 | { |
d62a17ae | 303 | struct interface *ifp; |
304 | struct prefix dp; | |
305 | struct prefix sp; | |
306 | int status; | |
307 | ||
308 | ifp = bfd_get_peer_info(zclient->ibuf, &dp, &sp, &status, vrf_id); | |
309 | ||
310 | if (BGP_DEBUG(zebra, ZEBRA)) { | |
311 | char buf[2][PREFIX2STR_BUFFER]; | |
312 | prefix2str(&dp, buf[0], sizeof(buf[0])); | |
313 | if (ifp) { | |
314 | zlog_debug( | |
a8bf7d9c | 315 | "Zebra: vrf %u interface %s bfd destination %s %s", |
d62a17ae | 316 | vrf_id, ifp->name, buf[0], |
317 | bfd_get_status_str(status)); | |
318 | } else { | |
319 | prefix2str(&sp, buf[1], sizeof(buf[1])); | |
320 | zlog_debug( | |
a8bf7d9c | 321 | "Zebra: vrf %u source %s bfd destination %s %s", |
d62a17ae | 322 | vrf_id, buf[1], buf[0], |
323 | bfd_get_status_str(status)); | |
324 | } | |
325 | } | |
326 | ||
327 | /* Bring the peer down if BFD is enabled in BGP */ | |
328 | { | |
329 | struct listnode *mnode, *node, *nnode; | |
330 | struct bgp *bgp; | |
331 | struct peer *peer; | |
332 | ||
333 | for (ALL_LIST_ELEMENTS_RO(bm->bgp, mnode, bgp)) | |
334 | for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) { | |
335 | if (!peer->bfd_info) | |
336 | continue; | |
337 | ||
338 | if ((dp.family == AF_INET) | |
339 | && (peer->su.sa.sa_family == AF_INET)) { | |
340 | if (dp.u.prefix4.s_addr | |
341 | != peer->su.sin.sin_addr.s_addr) | |
342 | continue; | |
343 | } else if ((dp.family == AF_INET6) | |
344 | && (peer->su.sa.sa_family | |
345 | == AF_INET6)) { | |
346 | if (memcmp(&dp.u.prefix6, | |
347 | &peer->su.sin6.sin6_addr, | |
348 | sizeof(struct in6_addr))) | |
349 | continue; | |
350 | } else | |
351 | continue; | |
352 | ||
353 | if (ifp && (ifp == peer->nexthop.ifp)) { | |
354 | bgp_bfd_peer_status_update(peer, | |
355 | status); | |
356 | } else { | |
357 | if (!peer->su_local) | |
358 | continue; | |
359 | ||
360 | if ((sp.family == AF_INET) | |
361 | && (peer->su_local->sa.sa_family | |
362 | == AF_INET)) { | |
363 | if (sp.u.prefix4.s_addr | |
364 | != peer->su_local->sin | |
365 | .sin_addr.s_addr) | |
366 | continue; | |
367 | } else if ((sp.family == AF_INET6) | |
368 | && (peer->su_local->sa | |
369 | .sa_family | |
370 | == AF_INET6)) { | |
371 | if (memcmp(&sp.u.prefix6, | |
372 | &peer->su_local->sin6 | |
373 | .sin6_addr, | |
374 | sizeof(struct | |
375 | in6_addr))) | |
376 | continue; | |
377 | } else | |
378 | continue; | |
379 | ||
380 | if ((vrf_id != VRF_DEFAULT) | |
381 | && (peer->bgp->vrf_id != vrf_id)) | |
382 | continue; | |
383 | ||
384 | bgp_bfd_peer_status_update(peer, | |
385 | status); | |
386 | } | |
387 | } | |
388 | } | |
389 | ||
390 | return 0; | |
c43ed2e4 DS |
391 | } |
392 | ||
393 | /* | |
394 | * bgp_bfd_peer_param_set - Set the configured BFD paramter values for peer. | |
395 | */ | |
d7c0a89a QY |
396 | static int bgp_bfd_peer_param_set(struct peer *peer, uint32_t min_rx, |
397 | uint32_t min_tx, uint8_t detect_mult, | |
d62a17ae | 398 | int defaults) |
c43ed2e4 | 399 | { |
d62a17ae | 400 | struct peer_group *group; |
401 | struct listnode *node, *nnode; | |
402 | int command = 0; | |
403 | ||
404 | bfd_set_param((struct bfd_info **)&(peer->bfd_info), min_rx, min_tx, | |
405 | detect_mult, defaults, &command); | |
406 | ||
407 | if (CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) { | |
408 | group = peer->group; | |
409 | for (ALL_LIST_ELEMENTS(group->peer, node, nnode, peer)) { | |
410 | command = 0; | |
411 | bfd_set_param((struct bfd_info **)&(peer->bfd_info), | |
412 | min_rx, min_tx, detect_mult, defaults, | |
413 | &command); | |
414 | ||
415 | if ((peer->status == Established) | |
416 | && (command == ZEBRA_BFD_DEST_REGISTER)) | |
417 | bgp_bfd_register_peer(peer); | |
418 | else if (command == ZEBRA_BFD_DEST_UPDATE) | |
419 | bgp_bfd_update_peer(peer); | |
420 | } | |
421 | } else { | |
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; | |
c43ed2e4 DS |
429 | } |
430 | ||
431 | /* | |
d62a17ae | 432 | * bgp_bfd_peer_param_unset - Delete the configured BFD paramter values for |
433 | * peer. | |
c43ed2e4 | 434 | */ |
d62a17ae | 435 | static int bgp_bfd_peer_param_unset(struct peer *peer) |
c43ed2e4 | 436 | { |
d62a17ae | 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 | bfd_info_free(&(peer->bfd_info)); | |
445 | group = peer->group; | |
446 | for (ALL_LIST_ELEMENTS(group->peer, node, nnode, peer)) { | |
447 | bgp_bfd_deregister_peer(peer); | |
448 | bfd_info_free(&(peer->bfd_info)); | |
449 | } | |
450 | } else { | |
451 | bgp_bfd_deregister_peer(peer); | |
452 | bfd_info_free(&(peer->bfd_info)); | |
453 | } | |
454 | return 0; | |
c43ed2e4 DS |
455 | } |
456 | ||
986aa00f | 457 | /* |
d62a17ae | 458 | * bgp_bfd_peer_param_type_set - set the BFD session type (multihop or |
459 | * singlehop) | |
986aa00f | 460 | */ |
d62a17ae | 461 | static int bgp_bfd_peer_param_type_set(struct peer *peer, |
462 | enum bfd_sess_type type) | |
986aa00f | 463 | { |
d62a17ae | 464 | struct peer_group *group; |
465 | struct listnode *node, *nnode; | |
466 | int command = 0; | |
467 | struct bfd_info *bfd_info; | |
468 | ||
469 | if (!peer->bfd_info) | |
470 | bfd_set_param((struct bfd_info **)&(peer->bfd_info), | |
471 | BFD_DEF_MIN_RX, BFD_DEF_MIN_TX, | |
472 | BFD_DEF_DETECT_MULT, 1, &command); | |
473 | ||
474 | bfd_info = (struct bfd_info *)peer->bfd_info; | |
475 | bfd_info->type = type; | |
476 | ||
477 | if (CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) { | |
478 | group = peer->group; | |
479 | for (ALL_LIST_ELEMENTS(group->peer, node, nnode, peer)) { | |
480 | command = 0; | |
481 | if (!peer->bfd_info) | |
482 | bfd_set_param( | |
483 | (struct bfd_info **)&(peer->bfd_info), | |
484 | BFD_DEF_MIN_RX, BFD_DEF_MIN_TX, | |
485 | BFD_DEF_DETECT_MULT, 1, &command); | |
486 | ||
487 | bfd_info = (struct bfd_info *)peer->bfd_info; | |
488 | bfd_info->type = type; | |
489 | ||
490 | if (peer->status == Established) { | |
491 | if (command == ZEBRA_BFD_DEST_REGISTER) | |
492 | bgp_bfd_register_peer(peer); | |
493 | else | |
494 | bgp_bfd_update_type(peer); | |
495 | } | |
496 | } | |
497 | } else { | |
498 | if (peer->status == Established) { | |
499 | if (command == ZEBRA_BFD_DEST_REGISTER) | |
500 | bgp_bfd_register_peer(peer); | |
501 | else | |
502 | bgp_bfd_update_type(peer); | |
503 | } | |
504 | } | |
505 | ||
506 | return 0; | |
986aa00f | 507 | } |
508 | ||
c43ed2e4 DS |
509 | /* |
510 | * bgp_bfd_peer_config_write - Write the peer BFD configuration. | |
511 | */ | |
d62a17ae | 512 | void bgp_bfd_peer_config_write(struct vty *vty, struct peer *peer, char *addr) |
c43ed2e4 | 513 | { |
d62a17ae | 514 | struct bfd_info *bfd_info; |
c43ed2e4 | 515 | |
d62a17ae | 516 | if (!peer->bfd_info) |
517 | return; | |
7f342629 | 518 | |
d62a17ae | 519 | bfd_info = (struct bfd_info *)peer->bfd_info; |
c43ed2e4 | 520 | |
d62a17ae | 521 | if (CHECK_FLAG(bfd_info->flags, BFD_FLAG_PARAM_CFG)) |
a0841732 RZ |
522 | #if HAVE_BFDD > 0 |
523 | vty_out(vty, " neighbor %s bfd\n", addr); | |
524 | #else | |
d62a17ae | 525 | vty_out(vty, " neighbor %s bfd %d %d %d\n", addr, |
526 | bfd_info->detect_mult, bfd_info->required_min_rx, | |
527 | bfd_info->desired_min_tx); | |
a0841732 | 528 | #endif /* HAVE_BFDD */ |
986aa00f | 529 | |
d62a17ae | 530 | if (bfd_info->type != BFD_TYPE_NOT_CONFIGURED) |
531 | vty_out(vty, " neighbor %s bfd %s\n", addr, | |
532 | (bfd_info->type == BFD_TYPE_MULTIHOP) ? "multihop" | |
533 | : "singlehop"); | |
986aa00f | 534 | |
d62a17ae | 535 | if (!CHECK_FLAG(bfd_info->flags, BFD_FLAG_PARAM_CFG) |
536 | && (bfd_info->type == BFD_TYPE_NOT_CONFIGURED)) | |
537 | vty_out(vty, " neighbor %s bfd\n", addr); | |
c43ed2e4 DS |
538 | } |
539 | ||
540 | /* | |
541 | * bgp_bfd_show_info - Show the peer BFD information. | |
542 | */ | |
9f049418 | 543 | void bgp_bfd_show_info(struct vty *vty, struct peer *peer, bool use_json, |
d62a17ae | 544 | json_object *json_neigh) |
c43ed2e4 | 545 | { |
d62a17ae | 546 | bfd_show_info(vty, (struct bfd_info *)peer->bfd_info, |
547 | bgp_bfd_is_peer_multihop(peer), 0, use_json, json_neigh); | |
c43ed2e4 DS |
548 | } |
549 | ||
550 | DEFUN (neighbor_bfd, | |
551 | neighbor_bfd_cmd, | |
9ccf14f7 | 552 | "neighbor <A.B.C.D|X:X::X:X|WORD> bfd", |
c43ed2e4 DS |
553 | NEIGHBOR_STR |
554 | NEIGHBOR_ADDR_STR2 | |
555 | "Enables BFD support\n") | |
556 | { | |
d62a17ae | 557 | int idx_peer = 1; |
558 | struct peer *peer; | |
559 | int ret; | |
c43ed2e4 | 560 | |
d62a17ae | 561 | peer = peer_and_group_lookup_vty(vty, argv[idx_peer]->arg); |
562 | if (!peer) | |
563 | return CMD_WARNING_CONFIG_FAILED; | |
c43ed2e4 | 564 | |
d62a17ae | 565 | ret = bgp_bfd_peer_param_set(peer, BFD_DEF_MIN_RX, BFD_DEF_MIN_TX, |
566 | BFD_DEF_DETECT_MULT, 1); | |
567 | if (ret != 0) | |
568 | return bgp_vty_return(vty, ret); | |
c43ed2e4 | 569 | |
d62a17ae | 570 | return CMD_SUCCESS; |
c43ed2e4 DS |
571 | } |
572 | ||
64dc4b2d RZ |
573 | #if HAVE_BFDD > 0 |
574 | DEFUN_HIDDEN( | |
575 | #else | |
576 | DEFUN( | |
577 | #endif /* HAVE_BFDD */ | |
578 | neighbor_bfd_param, | |
c43ed2e4 | 579 | neighbor_bfd_param_cmd, |
9ccf14f7 | 580 | "neighbor <A.B.C.D|X:X::X:X|WORD> bfd (2-255) (50-60000) (50-60000)", |
c43ed2e4 DS |
581 | NEIGHBOR_STR |
582 | NEIGHBOR_ADDR_STR2 | |
583 | "Enables BFD support\n" | |
584 | "Detect Multiplier\n" | |
585 | "Required min receive interval\n" | |
586 | "Desired min transmit interval\n") | |
587 | { | |
d62a17ae | 588 | int idx_peer = 1; |
589 | int idx_number_1 = 3; | |
590 | int idx_number_2 = 4; | |
591 | int idx_number_3 = 5; | |
592 | struct peer *peer; | |
d7c0a89a QY |
593 | uint32_t rx_val; |
594 | uint32_t tx_val; | |
595 | uint8_t dm_val; | |
d62a17ae | 596 | int ret; |
597 | ||
598 | peer = peer_and_group_lookup_vty(vty, argv[idx_peer]->arg); | |
599 | if (!peer) | |
600 | return CMD_WARNING_CONFIG_FAILED; | |
601 | ||
602 | if ((ret = bfd_validate_param( | |
603 | vty, argv[idx_number_1]->arg, argv[idx_number_2]->arg, | |
604 | argv[idx_number_3]->arg, &dm_val, &rx_val, &tx_val)) | |
605 | != CMD_SUCCESS) | |
606 | return ret; | |
607 | ||
608 | ret = bgp_bfd_peer_param_set(peer, rx_val, tx_val, dm_val, 0); | |
609 | if (ret != 0) | |
610 | return bgp_vty_return(vty, ret); | |
611 | ||
612 | return CMD_SUCCESS; | |
c43ed2e4 DS |
613 | } |
614 | ||
986aa00f | 615 | DEFUN_HIDDEN (neighbor_bfd_type, |
616 | neighbor_bfd_type_cmd, | |
e83a9414 | 617 | "neighbor <A.B.C.D|X:X::X:X|WORD> bfd <multihop|singlehop>", |
986aa00f | 618 | NEIGHBOR_STR |
619 | NEIGHBOR_ADDR_STR2 | |
620 | "Enables BFD support\n" | |
d7fa34c1 QY |
621 | "Multihop session\n" |
622 | "Single hop session\n") | |
986aa00f | 623 | { |
d62a17ae | 624 | int idx_peer = 1; |
625 | int idx_hop = 3; | |
626 | struct peer *peer; | |
627 | enum bfd_sess_type type; | |
628 | int ret; | |
629 | ||
630 | peer = peer_and_group_lookup_vty(vty, argv[idx_peer]->arg); | |
631 | if (!peer) | |
632 | return CMD_WARNING_CONFIG_FAILED; | |
633 | ||
634 | if (strmatch(argv[idx_hop]->text, "singlehop")) | |
635 | type = BFD_TYPE_SINGLEHOP; | |
636 | else if (strmatch(argv[idx_hop]->text, "multihop")) | |
637 | type = BFD_TYPE_MULTIHOP; | |
638 | else | |
639 | return CMD_WARNING_CONFIG_FAILED; | |
640 | ||
641 | ret = bgp_bfd_peer_param_type_set(peer, type); | |
642 | if (ret != 0) | |
643 | return bgp_vty_return(vty, ret); | |
644 | ||
645 | return CMD_SUCCESS; | |
986aa00f | 646 | } |
647 | ||
c43ed2e4 DS |
648 | DEFUN (no_neighbor_bfd, |
649 | no_neighbor_bfd_cmd, | |
64dc4b2d RZ |
650 | #if HAVE_BFDD > 0 |
651 | "no neighbor <A.B.C.D|X:X::X:X|WORD> bfd", | |
652 | #else | |
5bf15956 | 653 | "no neighbor <A.B.C.D|X:X::X:X|WORD> bfd [(2-255) (50-60000) (50-60000)]", |
64dc4b2d | 654 | #endif /* HAVE_BFDD */ |
c43ed2e4 DS |
655 | NO_STR |
656 | NEIGHBOR_STR | |
657 | NEIGHBOR_ADDR_STR2 | |
5bf15956 | 658 | "Disables BFD support\n" |
64dc4b2d | 659 | #if HAVE_BFDD == 0 |
5bf15956 DW |
660 | "Detect Multiplier\n" |
661 | "Required min receive interval\n" | |
64dc4b2d RZ |
662 | "Desired min transmit interval\n" |
663 | #endif /* !HAVE_BFDD */ | |
664 | ) | |
c43ed2e4 | 665 | { |
d62a17ae | 666 | int idx_peer = 2; |
667 | struct peer *peer; | |
668 | int ret; | |
c43ed2e4 | 669 | |
d62a17ae | 670 | peer = peer_and_group_lookup_vty(vty, argv[idx_peer]->arg); |
671 | if (!peer) | |
672 | return CMD_WARNING_CONFIG_FAILED; | |
c43ed2e4 | 673 | |
d62a17ae | 674 | ret = bgp_bfd_peer_param_unset(peer); |
675 | if (ret != 0) | |
676 | return bgp_vty_return(vty, ret); | |
c43ed2e4 | 677 | |
d62a17ae | 678 | return CMD_SUCCESS; |
c43ed2e4 DS |
679 | } |
680 | ||
813d4307 | 681 | |
986aa00f | 682 | DEFUN_HIDDEN (no_neighbor_bfd_type, |
683 | no_neighbor_bfd_type_cmd, | |
e83a9414 | 684 | "no neighbor <A.B.C.D|X:X::X:X|WORD> bfd <multihop|singlehop>", |
986aa00f | 685 | NO_STR |
686 | NEIGHBOR_STR | |
687 | NEIGHBOR_ADDR_STR2 | |
688 | "Disables BFD support\n" | |
3a2d747c QY |
689 | "Multihop session\n" |
690 | "Singlehop session\n") | |
986aa00f | 691 | { |
d62a17ae | 692 | int idx_peer = 2; |
693 | struct peer *peer; | |
694 | int ret; | |
986aa00f | 695 | |
d62a17ae | 696 | peer = peer_and_group_lookup_vty(vty, argv[idx_peer]->arg); |
697 | if (!peer) | |
698 | return CMD_WARNING_CONFIG_FAILED; | |
986aa00f | 699 | |
d62a17ae | 700 | if (!peer->bfd_info) |
701 | return 0; | |
986aa00f | 702 | |
d62a17ae | 703 | ret = bgp_bfd_peer_param_type_set(peer, BFD_TYPE_NOT_CONFIGURED); |
704 | if (ret != 0) | |
705 | return bgp_vty_return(vty, ret); | |
986aa00f | 706 | |
d62a17ae | 707 | return CMD_SUCCESS; |
986aa00f | 708 | } |
709 | ||
d62a17ae | 710 | void bgp_bfd_init(void) |
c43ed2e4 | 711 | { |
d62a17ae | 712 | bfd_gbl_init(); |
713 | ||
714 | /* Initialize BFD client functions */ | |
715 | zclient->interface_bfd_dest_update = bgp_bfd_dest_update; | |
716 | zclient->bfd_dest_replay = bgp_bfd_dest_replay; | |
717 | ||
718 | /* "neighbor bfd" commands. */ | |
719 | install_element(BGP_NODE, &neighbor_bfd_cmd); | |
720 | install_element(BGP_NODE, &neighbor_bfd_param_cmd); | |
721 | install_element(BGP_NODE, &neighbor_bfd_type_cmd); | |
722 | install_element(BGP_NODE, &no_neighbor_bfd_cmd); | |
723 | install_element(BGP_NODE, &no_neighbor_bfd_type_cmd); | |
c43ed2e4 | 724 | } |