]> git.proxmox.com Git - mirror_frr.git/blob - bgpd/bgpd.c
projects / mirror_frr.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge pull request #6755 from xThaid/dplane_batching
[mirror_frr.git] / bgpd / bgpd.c
1 /* BGP-4, BGP-4+ daemon program
2 * Copyright (C) 1996, 97, 98, 99, 2000 Kunihiro Ishiguro
3 *
4 * This file is part of GNU Zebra.
5 *
6 * GNU Zebra is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; either version 2, or (at your option) any
9 * later version.
10 *
11 * GNU Zebra is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License along
17 * with this program; see the file COPYING; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 #include <zebra.h>
22
23 #include "prefix.h"
24 #include "thread.h"
25 #include "buffer.h"
26 #include "stream.h"
27 #include "ringbuf.h"
28 #include "command.h"
29 #include "sockunion.h"
30 #include "sockopt.h"
31 #include "network.h"
32 #include "memory.h"
33 #include "filter.h"
34 #include "routemap.h"
35 #include "log.h"
36 #include "plist.h"
37 #include "linklist.h"
38 #include "workqueue.h"
39 #include "queue.h"
40 #include "zclient.h"
41 #include "bfd.h"
42 #include "hash.h"
43 #include "jhash.h"
44 #include "table.h"
45 #include "lib/json.h"
46 #include "frr_pthread.h"
47 #include "bitfield.h"
48
49 #include "bgpd/bgpd.h"
50 #include "bgpd/bgp_table.h"
51 #include "bgpd/bgp_aspath.h"
52 #include "bgpd/bgp_route.h"
53 #include "bgpd/bgp_dump.h"
54 #include "bgpd/bgp_debug.h"
55 #include "bgpd/bgp_errors.h"
56 #include "bgpd/bgp_community.h"
57 #include "bgpd/bgp_attr.h"
58 #include "bgpd/bgp_regex.h"
59 #include "bgpd/bgp_clist.h"
60 #include "bgpd/bgp_fsm.h"
61 #include "bgpd/bgp_packet.h"
62 #include "bgpd/bgp_zebra.h"
63 #include "bgpd/bgp_open.h"
64 #include "bgpd/bgp_filter.h"
65 #include "bgpd/bgp_nexthop.h"
66 #include "bgpd/bgp_damp.h"
67 #include "bgpd/bgp_mplsvpn.h"
68 #ifdef ENABLE_BGP_VNC
69 #include "bgpd/rfapi/bgp_rfapi_cfg.h"
70 #include "bgpd/rfapi/rfapi_backend.h"
71 #endif
72 #include "bgpd/bgp_evpn.h"
73 #include "bgpd/bgp_advertise.h"
74 #include "bgpd/bgp_network.h"
75 #include "bgpd/bgp_vty.h"
76 #include "bgpd/bgp_mpath.h"
77 #include "bgpd/bgp_nht.h"
78 #include "bgpd/bgp_updgrp.h"
79 #include "bgpd/bgp_bfd.h"
80 #include "bgpd/bgp_memory.h"
81 #include "bgpd/bgp_evpn_vty.h"
82 #include "bgpd/bgp_keepalives.h"
83 #include "bgpd/bgp_io.h"
84 #include "bgpd/bgp_ecommunity.h"
85 #include "bgpd/bgp_flowspec.h"
86 #include "bgpd/bgp_labelpool.h"
87 #include "bgpd/bgp_pbr.h"
88 #include "bgpd/bgp_addpath.h"
89 #include "bgpd/bgp_evpn_private.h"
90 #include "bgpd/bgp_evpn_mh.h"
91 #include "bgpd/bgp_mac.h"
92
93 DEFINE_MTYPE_STATIC(BGPD, PEER_TX_SHUTDOWN_MSG, "Peer shutdown message (TX)");
94 DEFINE_MTYPE_STATIC(BGPD, BGP_EVPN_INFO, "BGP EVPN instance information");
95 DEFINE_QOBJ_TYPE(bgp_master)
96 DEFINE_QOBJ_TYPE(bgp)
97 DEFINE_QOBJ_TYPE(peer)
98 DEFINE_HOOK(bgp_inst_delete, (struct bgp *bgp), (bgp))
99
100 /* BGP process wide configuration. */
101 static struct bgp_master bgp_master;
102
103 /* BGP process wide configuration pointer to export. */
104 struct bgp_master *bm;
105
106 /* BGP community-list. */
107 struct community_list_handler *bgp_clist;
108
109 unsigned int multipath_num = MULTIPATH_NUM;
110
111 static void bgp_if_finish(struct bgp *bgp);
112 static void peer_drop_dynamic_neighbor(struct peer *peer);
113
114 extern struct zclient *zclient;
115
116 /* handle main socket creation or deletion */
117 static int bgp_check_main_socket(bool create, struct bgp *bgp)
118 {
119 static int bgp_server_main_created;
120
121 if (create) {
122 if (bgp_server_main_created)
123 return 0;
124 if (bgp_socket(bgp, bm->port, bm->address) < 0)
125 return BGP_ERR_INVALID_VALUE;
126 bgp_server_main_created = 1;
127 return 0;
128 }
129 if (!bgp_server_main_created)
130 return 0;
131 bgp_close();
132 bgp_server_main_created = 0;
133 return 0;
134 }
135
136 void bgp_session_reset(struct peer *peer)
137 {
138 if (peer->doppelganger && (peer->doppelganger->status != Deleted)
139 && !(CHECK_FLAG(peer->doppelganger->flags, PEER_FLAG_CONFIG_NODE)))
140 peer_delete(peer->doppelganger);
141
142 BGP_EVENT_ADD(peer, BGP_Stop);
143 }
144
145 /*
146 * During session reset, we may delete the doppelganger peer, which would
147 * be the next node to the current node. If the session reset was invoked
148 * during walk of peer list, we would end up accessing the freed next
149 * node. This function moves the next node along.
150 */
151 static void bgp_session_reset_safe(struct peer *peer, struct listnode **nnode)
152 {
153 struct listnode *n;
154 struct peer *npeer;
155
156 n = (nnode) ? *nnode : NULL;
157 npeer = (n) ? listgetdata(n) : NULL;
158
159 if (peer->doppelganger && (peer->doppelganger->status != Deleted)
160 && !(CHECK_FLAG(peer->doppelganger->flags,
161 PEER_FLAG_CONFIG_NODE))) {
162 if (peer->doppelganger == npeer)
163 /* nnode and *nnode are confirmed to be non-NULL here */
164 *nnode = (*nnode)->next;
165 peer_delete(peer->doppelganger);
166 }
167
168 BGP_EVENT_ADD(peer, BGP_Stop);
169 }
170
171 /* BGP global flag manipulation. */
172 int bgp_option_set(int flag)
173 {
174 switch (flag) {
175 case BGP_OPT_NO_FIB:
176 case BGP_OPT_NO_LISTEN:
177 case BGP_OPT_NO_ZEBRA:
178 SET_FLAG(bm->options, flag);
179 break;
180 default:
181 return BGP_ERR_INVALID_FLAG;
182 }
183 return 0;
184 }
185
186 int bgp_option_unset(int flag)
187 {
188 switch (flag) {
189 /* Fall through. */
190 case BGP_OPT_NO_ZEBRA:
191 case BGP_OPT_NO_FIB:
192 UNSET_FLAG(bm->options, flag);
193 break;
194 default:
195 return BGP_ERR_INVALID_FLAG;
196 }
197 return 0;
198 }
199
200 int bgp_option_check(int flag)
201 {
202 return CHECK_FLAG(bm->options, flag);
203 }
204
205 /* Internal function to set BGP structure configureation flag. */
206 static void bgp_config_set(struct bgp *bgp, int config)
207 {
208 SET_FLAG(bgp->config, config);
209 }
210
211 static void bgp_config_unset(struct bgp *bgp, int config)
212 {
213 UNSET_FLAG(bgp->config, config);
214 }
215
216 static int bgp_config_check(struct bgp *bgp, int config)
217 {
218 return CHECK_FLAG(bgp->config, config);
219 }
220
221 /* Set BGP router identifier; distinguish between explicit config and other
222 * cases.
223 */
224 static int bgp_router_id_set(struct bgp *bgp, const struct in_addr *id,
225 bool is_config)
226 {
227 struct peer *peer;
228 struct listnode *node, *nnode;
229
230 if (IPV4_ADDR_SAME(&bgp->router_id, id))
231 return 0;
232
233 /* EVPN uses router id in RD, withdraw them */
234 if (is_evpn_enabled())
235 bgp_evpn_handle_router_id_update(bgp, true);
236
237 vpn_handle_router_id_update(bgp, true, is_config);
238
239 IPV4_ADDR_COPY(&bgp->router_id, id);
240
241 /* Set all peer's local identifier with this value. */
242 for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) {
243 IPV4_ADDR_COPY(&peer->local_id, id);
244
245 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status)) {
246 peer->last_reset = PEER_DOWN_RID_CHANGE;
247 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
248 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
249 }
250 }
251
252 /* EVPN uses router id in RD, update them */
253 if (is_evpn_enabled())
254 bgp_evpn_handle_router_id_update(bgp, false);
255
256 vpn_handle_router_id_update(bgp, false, is_config);
257
258 return 0;
259 }
260
261 void bgp_router_id_zebra_bump(vrf_id_t vrf_id, const struct prefix *router_id)
262 {
263 struct listnode *node, *nnode;
264 struct bgp *bgp;
265 struct in_addr *addr = NULL;
266
267 if (router_id != NULL)
268 addr = (struct in_addr *)&(router_id->u.prefix4);
269
270 if (vrf_id == VRF_DEFAULT) {
271 /* Router-id change for default VRF has to also update all
272 * views. */
273 for (ALL_LIST_ELEMENTS(bm->bgp, node, nnode, bgp)) {
274 if (bgp->inst_type == BGP_INSTANCE_TYPE_VRF)
275 continue;
276
277 if (addr)
278 bgp->router_id_zebra = *addr;
279 else
280 addr = &bgp->router_id_zebra;
281
282 if (!bgp->router_id_static.s_addr) {
283 /* Router ID is updated if there are no active
284 * peer sessions
285 */
286 if (bgp->established_peers == 0) {
287 if (BGP_DEBUG(zebra, ZEBRA))
288 zlog_debug(
289 "RID change : vrf %s(%u), RTR ID %s",
290 bgp->name_pretty,
291 bgp->vrf_id,
292 inet_ntoa(*addr));
293 bgp_router_id_set(bgp, addr, false);
294 }
295 }
296 }
297 } else {
298 bgp = bgp_lookup_by_vrf_id(vrf_id);
299 if (bgp) {
300 if (addr)
301 bgp->router_id_zebra = *addr;
302 else
303 addr = &bgp->router_id_zebra;
304
305 if (!bgp->router_id_static.s_addr) {
306 /* Router ID is updated if there are no active
307 * peer sessions
308 */
309 if (bgp->established_peers == 0) {
310 if (BGP_DEBUG(zebra, ZEBRA))
311 zlog_debug(
312 "RID change : vrf %s(%u), RTR ID %s",
313 bgp->name_pretty,
314 bgp->vrf_id,
315 inet_ntoa(*addr));
316 bgp_router_id_set(bgp, addr, false);
317 }
318 }
319
320 }
321 }
322 }
323
324 void bgp_router_id_static_set(struct bgp *bgp, struct in_addr id)
325 {
326 bgp->router_id_static = id;
327 bgp_router_id_set(bgp,
328 id.s_addr != INADDR_ANY ? &id : &bgp->router_id_zebra,
329 true /* is config */);
330 }
331
332 /* BGP's cluster-id control. */
333 int bgp_cluster_id_set(struct bgp *bgp, struct in_addr *cluster_id)
334 {
335 struct peer *peer;
336 struct listnode *node, *nnode;
337
338 if (bgp_config_check(bgp, BGP_CONFIG_CLUSTER_ID)
339 && IPV4_ADDR_SAME(&bgp->cluster_id, cluster_id))
340 return 0;
341
342 IPV4_ADDR_COPY(&bgp->cluster_id, cluster_id);
343 bgp_config_set(bgp, BGP_CONFIG_CLUSTER_ID);
344
345 /* Clear all IBGP peer. */
346 for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) {
347 if (peer->sort != BGP_PEER_IBGP)
348 continue;
349
350 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status)) {
351 peer->last_reset = PEER_DOWN_CLID_CHANGE;
352 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
353 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
354 }
355 }
356 return 0;
357 }
358
359 int bgp_cluster_id_unset(struct bgp *bgp)
360 {
361 struct peer *peer;
362 struct listnode *node, *nnode;
363
364 if (!bgp_config_check(bgp, BGP_CONFIG_CLUSTER_ID))
365 return 0;
366
367 bgp->cluster_id.s_addr = 0;
368 bgp_config_unset(bgp, BGP_CONFIG_CLUSTER_ID);
369
370 /* Clear all IBGP peer. */
371 for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) {
372 if (peer->sort != BGP_PEER_IBGP)
373 continue;
374
375 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status)) {
376 peer->last_reset = PEER_DOWN_CLID_CHANGE;
377 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
378 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
379 }
380 }
381 return 0;
382 }
383
384 /* time_t value that is monotonicly increasing
385 * and uneffected by adjustments to system clock
386 */
387 time_t bgp_clock(void)
388 {
389 struct timeval tv;
390
391 monotime(&tv);
392 return tv.tv_sec;
393 }
394
395 /* BGP timer configuration. */
396 void bgp_timers_set(struct bgp *bgp, uint32_t keepalive, uint32_t holdtime,
397 uint32_t connect_retry)
398 {
399 bgp->default_keepalive =
400 (keepalive < holdtime / 3 ? keepalive : holdtime / 3);
401 bgp->default_holdtime = holdtime;
402 bgp->default_connect_retry = connect_retry;
403 }
404
405 /* mostly for completeness - CLI uses its own defaults */
406 void bgp_timers_unset(struct bgp *bgp)
407 {
408 bgp->default_keepalive = BGP_DEFAULT_KEEPALIVE;
409 bgp->default_holdtime = BGP_DEFAULT_HOLDTIME;
410 bgp->default_connect_retry = BGP_DEFAULT_CONNECT_RETRY;
411 }
412
413 /* BGP confederation configuration. */
414 int bgp_confederation_id_set(struct bgp *bgp, as_t as)
415 {
416 struct peer *peer;
417 struct listnode *node, *nnode;
418 int already_confed;
419
420 if (as == 0)
421 return BGP_ERR_INVALID_AS;
422
423 /* Remember - were we doing confederation before? */
424 already_confed = bgp_config_check(bgp, BGP_CONFIG_CONFEDERATION);
425 bgp->confed_id = as;
426 bgp_config_set(bgp, BGP_CONFIG_CONFEDERATION);
427
428 /* If we were doing confederation already, this is just an external
429 AS change. Just Reset EBGP sessions, not CONFED sessions. If we
430 were not doing confederation before, reset all EBGP sessions. */
431 for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) {
432 bgp_peer_sort_t ptype = peer_sort(peer);
433
434 /* We're looking for peers who's AS is not local or part of our
435 confederation. */
436 if (already_confed) {
437 if (ptype == BGP_PEER_EBGP) {
438 peer->local_as = as;
439 if (BGP_IS_VALID_STATE_FOR_NOTIF(
440 peer->status)) {
441 peer->last_reset =
442 PEER_DOWN_CONFED_ID_CHANGE;
443 bgp_notify_send(
444 peer, BGP_NOTIFY_CEASE,
445 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
446 } else
447 bgp_session_reset_safe(peer, &nnode);
448 }
449 } else {
450 /* Not doign confederation before, so reset every
451 non-local
452 session */
453 if (ptype != BGP_PEER_IBGP) {
454 /* Reset the local_as to be our EBGP one */
455 if (ptype == BGP_PEER_EBGP)
456 peer->local_as = as;
457 if (BGP_IS_VALID_STATE_FOR_NOTIF(
458 peer->status)) {
459 peer->last_reset =
460 PEER_DOWN_CONFED_ID_CHANGE;
461 bgp_notify_send(
462 peer, BGP_NOTIFY_CEASE,
463 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
464 } else
465 bgp_session_reset_safe(peer, &nnode);
466 }
467 }
468 }
469 return 0;
470 }
471
472 int bgp_confederation_id_unset(struct bgp *bgp)
473 {
474 struct peer *peer;
475 struct listnode *node, *nnode;
476
477 bgp->confed_id = 0;
478 bgp_config_unset(bgp, BGP_CONFIG_CONFEDERATION);
479
480 for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) {
481 /* We're looking for peers who's AS is not local */
482 if (peer_sort(peer) != BGP_PEER_IBGP) {
483 peer->local_as = bgp->as;
484 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status)) {
485 peer->last_reset = PEER_DOWN_CONFED_ID_CHANGE;
486 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
487 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
488 }
489
490 else
491 bgp_session_reset_safe(peer, &nnode);
492 }
493 }
494 return 0;
495 }
496
497 /* Is an AS part of the confed or not? */
498 bool bgp_confederation_peers_check(struct bgp *bgp, as_t as)
499 {
500 int i;
501
502 if (!bgp)
503 return false;
504
505 for (i = 0; i < bgp->confed_peers_cnt; i++)
506 if (bgp->confed_peers[i] == as)
507 return true;
508
509 return false;
510 }
511
512 /* Add an AS to the confederation set. */
513 int bgp_confederation_peers_add(struct bgp *bgp, as_t as)
514 {
515 struct peer *peer;
516 struct listnode *node, *nnode;
517
518 if (!bgp)
519 return BGP_ERR_INVALID_BGP;
520
521 if (bgp->as == as)
522 return BGP_ERR_INVALID_AS;
523
524 if (bgp_confederation_peers_check(bgp, as))
525 return -1;
526
527 if (bgp->confed_peers)
528 bgp->confed_peers =
529 XREALLOC(MTYPE_BGP_CONFED_LIST, bgp->confed_peers,
530 (bgp->confed_peers_cnt + 1) * sizeof(as_t));
531 else
532 bgp->confed_peers =
533 XMALLOC(MTYPE_BGP_CONFED_LIST,
534 (bgp->confed_peers_cnt + 1) * sizeof(as_t));
535
536 bgp->confed_peers[bgp->confed_peers_cnt] = as;
537 bgp->confed_peers_cnt++;
538
539 if (bgp_config_check(bgp, BGP_CONFIG_CONFEDERATION)) {
540 for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) {
541 if (peer->as == as) {
542 peer->local_as = bgp->as;
543 if (BGP_IS_VALID_STATE_FOR_NOTIF(
544 peer->status)) {
545 peer->last_reset =
546 PEER_DOWN_CONFED_PEER_CHANGE;
547 bgp_notify_send(
548 peer, BGP_NOTIFY_CEASE,
549 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
550 } else
551 bgp_session_reset_safe(peer, &nnode);
552 }
553 }
554 }
555 return 0;
556 }
557
558 /* Delete an AS from the confederation set. */
559 int bgp_confederation_peers_remove(struct bgp *bgp, as_t as)
560 {
561 int i;
562 int j;
563 struct peer *peer;
564 struct listnode *node, *nnode;
565
566 if (!bgp)
567 return -1;
568
569 if (!bgp_confederation_peers_check(bgp, as))
570 return -1;
571
572 for (i = 0; i < bgp->confed_peers_cnt; i++)
573 if (bgp->confed_peers[i] == as)
574 for (j = i + 1; j < bgp->confed_peers_cnt; j++)
575 bgp->confed_peers[j - 1] = bgp->confed_peers[j];
576
577 bgp->confed_peers_cnt--;
578
579 if (bgp->confed_peers_cnt == 0) {
580 if (bgp->confed_peers)
581 XFREE(MTYPE_BGP_CONFED_LIST, bgp->confed_peers);
582 bgp->confed_peers = NULL;
583 } else
584 bgp->confed_peers =
585 XREALLOC(MTYPE_BGP_CONFED_LIST, bgp->confed_peers,
586 bgp->confed_peers_cnt * sizeof(as_t));
587
588 /* Now reset any peer who's remote AS has just been removed from the
589 CONFED */
590 if (bgp_config_check(bgp, BGP_CONFIG_CONFEDERATION)) {
591 for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) {
592 if (peer->as == as) {
593 peer->local_as = bgp->confed_id;
594 if (BGP_IS_VALID_STATE_FOR_NOTIF(
595 peer->status)) {
596 peer->last_reset =
597 PEER_DOWN_CONFED_PEER_CHANGE;
598 bgp_notify_send(
599 peer, BGP_NOTIFY_CEASE,
600 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
601 } else
602 bgp_session_reset_safe(peer, &nnode);
603 }
604 }
605 }
606
607 return 0;
608 }
609
610 /* Local preference configuration. */
611 int bgp_default_local_preference_set(struct bgp *bgp, uint32_t local_pref)
612 {
613 if (!bgp)
614 return -1;
615
616 bgp->default_local_pref = local_pref;
617
618 return 0;
619 }
620
621 int bgp_default_local_preference_unset(struct bgp *bgp)
622 {
623 if (!bgp)
624 return -1;
625
626 bgp->default_local_pref = BGP_DEFAULT_LOCAL_PREF;
627
628 return 0;
629 }
630
631 /* Local preference configuration. */
632 int bgp_default_subgroup_pkt_queue_max_set(struct bgp *bgp, uint32_t queue_size)
633 {
634 if (!bgp)
635 return -1;
636
637 bgp->default_subgroup_pkt_queue_max = queue_size;
638
639 return 0;
640 }
641
642 int bgp_default_subgroup_pkt_queue_max_unset(struct bgp *bgp)
643 {
644 if (!bgp)
645 return -1;
646 bgp->default_subgroup_pkt_queue_max =
647 BGP_DEFAULT_SUBGROUP_PKT_QUEUE_MAX;
648
649 return 0;
650 }
651
652 /* Listen limit configuration. */
653 int bgp_listen_limit_set(struct bgp *bgp, int listen_limit)
654 {
655 if (!bgp)
656 return -1;
657
658 bgp->dynamic_neighbors_limit = listen_limit;
659
660 return 0;
661 }
662
663 int bgp_listen_limit_unset(struct bgp *bgp)
664 {
665 if (!bgp)
666 return -1;
667
668 bgp->dynamic_neighbors_limit = BGP_DYNAMIC_NEIGHBORS_LIMIT_DEFAULT;
669
670 return 0;
671 }
672
673 int bgp_map_afi_safi_iana2int(iana_afi_t pkt_afi, iana_safi_t pkt_safi,
674 afi_t *afi, safi_t *safi)
675 {
676 /* Map from IANA values to internal values, return error if
677 * values are unrecognized.
678 */
679 *afi = afi_iana2int(pkt_afi);
680 *safi = safi_iana2int(pkt_safi);
681 if (*afi == AFI_MAX || *safi == SAFI_MAX)
682 return -1;
683
684 return 0;
685 }
686
687 int bgp_map_afi_safi_int2iana(afi_t afi, safi_t safi, iana_afi_t *pkt_afi,
688 iana_safi_t *pkt_safi)
689 {
690 /* Map from internal values to IANA values, return error if
691 * internal values are bad (unexpected).
692 */
693 if (afi == AFI_MAX || safi == SAFI_MAX)
694 return -1;
695 *pkt_afi = afi_int2iana(afi);
696 *pkt_safi = safi_int2iana(safi);
697 return 0;
698 }
699
700 struct peer_af *peer_af_create(struct peer *peer, afi_t afi, safi_t safi)
701 {
702 struct peer_af *af;
703 int afid;
704 struct bgp *bgp;
705
706 if (!peer)
707 return NULL;
708
709 afid = afindex(afi, safi);
710 if (afid >= BGP_AF_MAX)
711 return NULL;
712
713 bgp = peer->bgp;
714 assert(peer->peer_af_array[afid] == NULL);
715
716 /* Allocate new peer af */
717 af = XCALLOC(MTYPE_BGP_PEER_AF, sizeof(struct peer_af));
718
719 peer->peer_af_array[afid] = af;
720 af->afi = afi;
721 af->safi = safi;
722 af->afid = afid;
723 af->peer = peer;
724 bgp->af_peer_count[afi][safi]++;
725
726 return af;
727 }
728
729 struct peer_af *peer_af_find(struct peer *peer, afi_t afi, safi_t safi)
730 {
731 int afid;
732
733 if (!peer)
734 return NULL;
735
736 afid = afindex(afi, safi);
737 if (afid >= BGP_AF_MAX)
738 return NULL;
739
740 return peer->peer_af_array[afid];
741 }
742
743 int peer_af_delete(struct peer *peer, afi_t afi, safi_t safi)
744 {
745 struct peer_af *af;
746 int afid;
747 struct bgp *bgp;
748
749 if (!peer)
750 return -1;
751
752 afid = afindex(afi, safi);
753 if (afid >= BGP_AF_MAX)
754 return -1;
755
756 af = peer->peer_af_array[afid];
757 if (!af)
758 return -1;
759
760 bgp = peer->bgp;
761 bgp_stop_announce_route_timer(af);
762
763 if (PAF_SUBGRP(af)) {
764 if (BGP_DEBUG(update_groups, UPDATE_GROUPS))
765 zlog_debug("u%" PRIu64 ":s%" PRIu64 " remove peer %s",
766 af->subgroup->update_group->id,
767 af->subgroup->id, peer->host);
768 }
769
770
771 update_subgroup_remove_peer(af->subgroup, af);
772
773 if (bgp->af_peer_count[afi][safi])
774 bgp->af_peer_count[afi][safi]--;
775
776 peer->peer_af_array[afid] = NULL;
777 XFREE(MTYPE_BGP_PEER_AF, af);
778 return 0;
779 }
780
781 /* Peer comparison function for sorting. */
782 int peer_cmp(struct peer *p1, struct peer *p2)
783 {
784 if (p1->group && !p2->group)
785 return -1;
786
787 if (!p1->group && p2->group)
788 return 1;
789
790 if (p1->group == p2->group) {
791 if (p1->conf_if && !p2->conf_if)
792 return -1;
793
794 if (!p1->conf_if && p2->conf_if)
795 return 1;
796
797 if (p1->conf_if && p2->conf_if)
798 return if_cmp_name_func(p1->conf_if, p2->conf_if);
799 } else
800 return strcmp(p1->group->name, p2->group->name);
801
802 return sockunion_cmp(&p1->su, &p2->su);
803 }
804
805 static unsigned int peer_hash_key_make(const void *p)
806 {
807 const struct peer *peer = p;
808 return sockunion_hash(&peer->su);
809 }
810
811 static bool peer_hash_same(const void *p1, const void *p2)
812 {
813 const struct peer *peer1 = p1;
814 const struct peer *peer2 = p2;
815 return (sockunion_same(&peer1->su, &peer2->su)
816 && CHECK_FLAG(peer1->flags, PEER_FLAG_CONFIG_NODE)
817 == CHECK_FLAG(peer2->flags, PEER_FLAG_CONFIG_NODE));
818 }
819
820 void peer_flag_inherit(struct peer *peer, uint32_t flag)
821 {
822 bool group_val;
823
824 /* Skip if peer is not a peer-group member. */
825 if (!peer_group_active(peer))
826 return;
827
828 /* Unset override flag to signal inheritance from peer-group. */
829 UNSET_FLAG(peer->flags_override, flag);
830
831 /*
832 * Inherit flag state from peer-group. If the flag of the peer-group is
833 * not being inverted, the peer must inherit the inverse of the current
834 * peer-group flag state.
835 */
836 group_val = CHECK_FLAG(peer->group->conf->flags, flag);
837 if (!CHECK_FLAG(peer->group->conf->flags_invert, flag)
838 && CHECK_FLAG(peer->flags_invert, flag))
839 COND_FLAG(peer->flags, flag, !group_val);
840 else
841 COND_FLAG(peer->flags, flag, group_val);
842 }
843
844 int peer_af_flag_check(struct peer *peer, afi_t afi, safi_t safi, uint32_t flag)
845 {
846 return CHECK_FLAG(peer->af_flags[afi][safi], flag);
847 }
848
849 void peer_af_flag_inherit(struct peer *peer, afi_t afi, safi_t safi,
850 uint32_t flag)
851 {
852 bool group_val;
853
854 /* Skip if peer is not a peer-group member. */
855 if (!peer_group_active(peer))
856 return;
857
858 /* Unset override flag to signal inheritance from peer-group. */
859 UNSET_FLAG(peer->af_flags_override[afi][safi], flag);
860
861 /*
862 * Inherit flag state from peer-group. If the flag of the peer-group is
863 * not being inverted, the peer must inherit the inverse of the current
864 * peer-group flag state.
865 */
866 group_val = CHECK_FLAG(peer->group->conf->af_flags[afi][safi], flag);
867 if (!CHECK_FLAG(peer->group->conf->af_flags_invert[afi][safi], flag)
868 && CHECK_FLAG(peer->af_flags_invert[afi][safi], flag))
869 COND_FLAG(peer->af_flags[afi][safi], flag, !group_val);
870 else
871 COND_FLAG(peer->af_flags[afi][safi], flag, group_val);
872 }
873
874 /* Check peer's AS number and determines if this peer is IBGP or EBGP */
875 static inline bgp_peer_sort_t peer_calc_sort(struct peer *peer)
876 {
877 struct bgp *bgp;
878
879 bgp = peer->bgp;
880
881 /* Peer-group */
882 if (CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
883 if (peer->as_type == AS_INTERNAL)
884 return BGP_PEER_IBGP;
885
886 else if (peer->as_type == AS_EXTERNAL)
887 return BGP_PEER_EBGP;
888
889 else if (peer->as_type == AS_SPECIFIED && peer->as) {
890 assert(bgp);
891 return (bgp->as == peer->as ? BGP_PEER_IBGP
892 : BGP_PEER_EBGP);
893 }
894
895 else {
896 struct peer *peer1;
897
898 assert(peer->group);
899 peer1 = listnode_head(peer->group->peer);
900
901 if (peer1)
902 return peer1->sort;
903 }
904 return BGP_PEER_INTERNAL;
905 }
906
907 /* Normal peer */
908 if (bgp && CHECK_FLAG(bgp->config, BGP_CONFIG_CONFEDERATION)) {
909 if (peer->local_as == 0)
910 return BGP_PEER_INTERNAL;
911
912 if (peer->local_as == peer->as) {
913 if (bgp->as == bgp->confed_id) {
914 if (peer->local_as == bgp->as)
915 return BGP_PEER_IBGP;
916 else
917 return BGP_PEER_EBGP;
918 } else {
919 if (peer->local_as == bgp->confed_id)
920 return BGP_PEER_EBGP;
921 else
922 return BGP_PEER_IBGP;
923 }
924 }
925
926 if (bgp_confederation_peers_check(bgp, peer->as))
927 return BGP_PEER_CONFED;
928
929 return BGP_PEER_EBGP;
930 } else {
931 if (peer->as_type == AS_UNSPECIFIED) {
932 /* check if in peer-group with AS information */
933 if (peer->group
934 && (peer->group->conf->as_type != AS_UNSPECIFIED)) {
935 if (peer->group->conf->as_type
936 == AS_SPECIFIED) {
937 if (peer->local_as
938 == peer->group->conf->as)
939 return BGP_PEER_IBGP;
940 else
941 return BGP_PEER_EBGP;
942 } else if (peer->group->conf->as_type
943 == AS_INTERNAL)
944 return BGP_PEER_IBGP;
945 else
946 return BGP_PEER_EBGP;
947 }
948 /* no AS information anywhere, let caller know */
949 return BGP_PEER_UNSPECIFIED;
950 } else if (peer->as_type != AS_SPECIFIED)
951 return (peer->as_type == AS_INTERNAL ? BGP_PEER_IBGP
952 : BGP_PEER_EBGP);
953
954 return (peer->local_as == 0
955 ? BGP_PEER_INTERNAL
956 : peer->local_as == peer->as ? BGP_PEER_IBGP
957 : BGP_PEER_EBGP);
958 }
959 }
960
961 /* Calculate and cache the peer "sort" */
962 bgp_peer_sort_t peer_sort(struct peer *peer)
963 {
964 peer->sort = peer_calc_sort(peer);
965 return peer->sort;
966 }
967
968 bgp_peer_sort_t peer_sort_lookup(struct peer *peer)
969 {
970 return peer->sort;
971 }
972
973 static void peer_free(struct peer *peer)
974 {
975 afi_t afi;
976 safi_t safi;
977
978 assert(peer->status == Deleted);
979
980 QOBJ_UNREG(peer);
981
982 /* this /ought/ to have been done already through bgp_stop earlier,
983 * but just to be sure..
984 */
985 bgp_timer_set(peer);
986 bgp_reads_off(peer);
987 bgp_writes_off(peer);
988 assert(!peer->t_write);
989 assert(!peer->t_read);
990 BGP_EVENT_FLUSH(peer);
991
992 pthread_mutex_destroy(&peer->io_mtx);
993
994 /* Free connected nexthop, if present */
995 if (CHECK_FLAG(peer->flags, PEER_FLAG_CONFIG_NODE)
996 && !peer_dynamic_neighbor(peer))
997 bgp_delete_connected_nexthop(family2afi(peer->su.sa.sa_family),
998 peer);
999
1000 XFREE(MTYPE_PEER_TX_SHUTDOWN_MSG, peer->tx_shutdown_message);
1001
1002 XFREE(MTYPE_PEER_DESC, peer->desc);
1003 XFREE(MTYPE_BGP_PEER_HOST, peer->host);
1004 XFREE(MTYPE_BGP_PEER_HOST, peer->domainname);
1005 XFREE(MTYPE_BGP_PEER_IFNAME, peer->ifname);
1006
1007 /* Update source configuration. */
1008 if (peer->update_source) {
1009 sockunion_free(peer->update_source);
1010 peer->update_source = NULL;
1011 }
1012
1013 XFREE(MTYPE_PEER_UPDATE_SOURCE, peer->update_if);
1014
1015 XFREE(MTYPE_TMP, peer->notify.data);
1016 memset(&peer->notify, 0, sizeof(struct bgp_notify));
1017
1018 if (peer->clear_node_queue)
1019 work_queue_free_and_null(&peer->clear_node_queue);
1020
1021 bgp_sync_delete(peer);
1022
1023 XFREE(MTYPE_PEER_CONF_IF, peer->conf_if);
1024
1025 bfd_info_free(&(peer->bfd_info));
1026
1027 for (afi = AFI_IP; afi < AFI_MAX; afi++) {
1028 for (safi = SAFI_UNICAST; safi < SAFI_MAX; safi++) {
1029 bgp_addpath_set_peer_type(peer, afi, safi,
1030 BGP_ADDPATH_NONE);
1031 }
1032 }
1033
1034 bgp_unlock(peer->bgp);
1035
1036 memset(peer, 0, sizeof(struct peer));
1037
1038 XFREE(MTYPE_BGP_PEER, peer);
1039 }
1040
1041 /* increase reference count on a struct peer */
1042 struct peer *peer_lock_with_caller(const char *name, struct peer *peer)
1043 {
1044 assert(peer && (peer->lock >= 0));
1045
1046 #if 0
1047 zlog_debug("%s peer_lock %p %d", name, peer, peer->lock);
1048 #endif
1049
1050 peer->lock++;
1051
1052 return peer;
1053 }
1054
1055 /* decrease reference count on a struct peer
1056 * struct peer is freed and NULL returned if last reference
1057 */
1058 struct peer *peer_unlock_with_caller(const char *name, struct peer *peer)
1059 {
1060 assert(peer && (peer->lock > 0));
1061
1062 #if 0
1063 zlog_debug("%s peer_unlock %p %d", name, peer, peer->lock);
1064 #endif
1065
1066 peer->lock--;
1067
1068 if (peer->lock == 0) {
1069 peer_free(peer);
1070 return NULL;
1071 }
1072
1073 return peer;
1074 }
1075 /* BGP GR changes */
1076
1077 int bgp_global_gr_init(struct bgp *bgp)
1078 {
1079 if (BGP_DEBUG(graceful_restart, GRACEFUL_RESTART))
1080 zlog_debug("%s called ..", __func__);
1081
1082 int local_GLOBAL_GR_FSM[BGP_GLOBAL_GR_MODE][BGP_GLOBAL_GR_EVENT_CMD] = {
1083 /* GLOBAL_HELPER Mode */
1084 {
1085 /*Event -> */
1086 /*GLOBAL_GR_cmd*/ /*no_Global_GR_cmd*/
1087 GLOBAL_GR, GLOBAL_INVALID,
1088 /*GLOBAL_DISABLE_cmd*/ /*no_Global_Disable_cmd*/
1089 GLOBAL_DISABLE, GLOBAL_INVALID
1090 },
1091 /* GLOBAL_GR Mode */
1092 {
1093 /*Event -> */
1094 /*GLOBAL_GR_cmd*/ /*no_Global_GR_cmd*/
1095 GLOBAL_INVALID, GLOBAL_HELPER,
1096 /*GLOBAL_DISABLE_cmd*/ /*no_Global_Disable_cmd*/
1097 GLOBAL_DISABLE, GLOBAL_INVALID
1098 },
1099 /* GLOBAL_DISABLE Mode */
1100 {
1101 /*Event -> */
1102 /*GLOBAL_GR_cmd */ /*no_Global_GR_cmd*/
1103 GLOBAL_GR, GLOBAL_INVALID,
1104 /*GLOBAL_DISABLE_cmd*//*no_Global_Disable_cmd*/
1105 GLOBAL_INVALID, GLOBAL_HELPER
1106 },
1107 /* GLOBAL_INVALID Mode */
1108 {
1109 /*Event -> */
1110 /*GLOBAL_GR_cmd*/ /*no_Global_GR_cmd*/
1111 GLOBAL_INVALID, GLOBAL_INVALID,
1112 /*GLOBAL_DISABLE_cmd*/ /*no_Global_Disable_cmd*/
1113 GLOBAL_INVALID, GLOBAL_INVALID
1114 }
1115 };
1116 memcpy(bgp->GLOBAL_GR_FSM, local_GLOBAL_GR_FSM,
1117 sizeof(local_GLOBAL_GR_FSM));
1118
1119 bgp->global_gr_present_state = GLOBAL_HELPER;
1120 bgp->present_zebra_gr_state = ZEBRA_GR_DISABLE;
1121
1122 return BGP_GR_SUCCESS;
1123 }
1124
1125 int bgp_peer_gr_init(struct peer *peer)
1126 {
1127 if (BGP_DEBUG(graceful_restart, GRACEFUL_RESTART))
1128 zlog_debug("%s called ..", __func__);
1129
1130 struct bgp_peer_gr local_Peer_GR_FSM[BGP_PEER_GR_MODE]
1131 [BGP_PEER_GR_EVENT_CMD] = {
1132 {
1133 /* PEER_HELPER Mode */
1134 /* Event-> */ /* PEER_GR_CMD */ /* NO_PEER_GR_CMD */
1135 { PEER_GR, bgp_peer_gr_action }, {PEER_INVALID, NULL },
1136 /* Event-> */ /* PEER_DISABLE_CMD */ /* NO_PEER_DISABLE_CMD */
1137 {PEER_DISABLE, bgp_peer_gr_action }, {PEER_INVALID, NULL },
1138 /* Event-> */ /* PEER_HELPER_cmd */ /* NO_PEER_HELPER_CMD */
1139 { PEER_INVALID, NULL }, {PEER_GLOBAL_INHERIT,
1140 bgp_peer_gr_action }
1141 },
1142 {
1143 /* PEER_GR Mode */
1144 /* Event-> */ /* PEER_GR_CMD */ /* NO_PEER_GR_CMD */
1145 { PEER_INVALID, NULL }, { PEER_GLOBAL_INHERIT,
1146 bgp_peer_gr_action },
1147 /* Event-> */ /* PEER_DISABLE_CMD */ /* NO_PEER_DISABLE_CMD */
1148 {PEER_DISABLE, bgp_peer_gr_action }, { PEER_INVALID, NULL },
1149 /* Event-> */ /* PEER_HELPER_cmd */ /* NO_PEER_HELPER_CMD */
1150 { PEER_HELPER, bgp_peer_gr_action }, { PEER_INVALID, NULL }
1151 },
1152 {
1153 /* PEER_DISABLE Mode */
1154 /* Event-> */ /* PEER_GR_CMD */ /* NO_PEER_GR_CMD */
1155 { PEER_GR, bgp_peer_gr_action }, { PEER_INVALID, NULL },
1156 /* Event-> */ /* PEER_DISABLE_CMD */ /* NO_PEER_DISABLE_CMD */
1157 { PEER_INVALID, NULL }, { PEER_GLOBAL_INHERIT,
1158 bgp_peer_gr_action },
1159 /* Event-> */ /* PEER_HELPER_cmd */ /* NO_PEER_HELPER_CMD */
1160 { PEER_HELPER, bgp_peer_gr_action }, { PEER_INVALID, NULL }
1161 },
1162 {
1163 /* PEER_INVALID Mode */
1164 /* Event-> */ /* PEER_GR_CMD */ /* NO_PEER_GR_CMD */
1165 { PEER_INVALID, NULL }, { PEER_INVALID, NULL },
1166 /* Event-> */ /* PEER_DISABLE_CMD */ /* NO_PEER_DISABLE_CMD */
1167 { PEER_INVALID, NULL }, { PEER_INVALID, NULL },
1168 /* Event-> */ /* PEER_HELPER_cmd */ /* NO_PEER_HELPER_CMD */
1169 { PEER_INVALID, NULL }, { PEER_INVALID, NULL },
1170 },
1171 {
1172 /* PEER_GLOBAL_INHERIT Mode */
1173 /* Event-> */ /* PEER_GR_CMD */ /* NO_PEER_GR_CMD */
1174 { PEER_GR, bgp_peer_gr_action }, { PEER_INVALID, NULL },
1175 /* Event-> */ /* PEER_DISABLE_CMD */ /* NO_PEER_DISABLE_CMD */
1176 { PEER_DISABLE, bgp_peer_gr_action}, { PEER_INVALID, NULL },
1177 /* Event-> */ /* PEER_HELPER_cmd */ /* NO_PEER_HELPER_CMD */
1178 { PEER_HELPER, bgp_peer_gr_action }, { PEER_INVALID, NULL }
1179 }
1180 };
1181 memcpy(&peer->PEER_GR_FSM, local_Peer_GR_FSM,
1182 sizeof(local_Peer_GR_FSM));
1183 peer->peer_gr_present_state = PEER_GLOBAL_INHERIT;
1184 bgp_peer_move_to_gr_mode(peer, PEER_GLOBAL_INHERIT);
1185
1186 return BGP_GR_SUCCESS;
1187 }
1188
1189 /* Allocate new peer object, implicitely locked. */
1190 struct peer *peer_new(struct bgp *bgp)
1191 {
1192 afi_t afi;
1193 safi_t safi;
1194 struct peer *peer;
1195 struct servent *sp;
1196
1197 /* bgp argument is absolutely required */
1198 assert(bgp);
1199
1200 /* Allocate new peer. */
1201 peer = XCALLOC(MTYPE_BGP_PEER, sizeof(struct peer));
1202
1203 /* Set default value. */
1204 peer->fd = -1;
1205 peer->v_start = BGP_INIT_START_TIMER;
1206 peer->v_connect = bgp->default_connect_retry;
1207 peer->status = Idle;
1208 peer->ostatus = Idle;
1209 peer->cur_event = peer->last_event = peer->last_major_event = 0;
1210 peer->bgp = bgp_lock(bgp);
1211 peer = peer_lock(peer); /* initial reference */
1212 peer->password = NULL;
1213
1214 /* Set default flags. */
1215 FOREACH_AFI_SAFI (afi, safi) {
1216 SET_FLAG(peer->af_flags[afi][safi], PEER_FLAG_SEND_COMMUNITY);
1217 SET_FLAG(peer->af_flags[afi][safi],
1218 PEER_FLAG_SEND_EXT_COMMUNITY);
1219 SET_FLAG(peer->af_flags[afi][safi],
1220 PEER_FLAG_SEND_LARGE_COMMUNITY);
1221
1222 SET_FLAG(peer->af_flags_invert[afi][safi],
1223 PEER_FLAG_SEND_COMMUNITY);
1224 SET_FLAG(peer->af_flags_invert[afi][safi],
1225 PEER_FLAG_SEND_EXT_COMMUNITY);
1226 SET_FLAG(peer->af_flags_invert[afi][safi],
1227 PEER_FLAG_SEND_LARGE_COMMUNITY);
1228 peer->addpath_type[afi][safi] = BGP_ADDPATH_NONE;
1229 }
1230
1231 /* set nexthop-unchanged for l2vpn evpn by default */
1232 SET_FLAG(peer->af_flags[AFI_L2VPN][SAFI_EVPN],
1233 PEER_FLAG_NEXTHOP_UNCHANGED);
1234
1235 SET_FLAG(peer->sflags, PEER_STATUS_CAPABILITY_OPEN);
1236
1237 /* Initialize per peer bgp GR FSM */
1238 bgp_peer_gr_init(peer);
1239
1240 /* Create buffers. */
1241 peer->ibuf = stream_fifo_new();
1242 peer->obuf = stream_fifo_new();
1243 pthread_mutex_init(&peer->io_mtx, NULL);
1244
1245 /* We use a larger buffer for peer->obuf_work in the event that:
1246 * - We RX a BGP_UPDATE where the attributes alone are just
1247 * under BGP_MAX_PACKET_SIZE
1248 * - The user configures an outbound route-map that does many as-path
1249 * prepends or adds many communities. At most they can have
1250 * CMD_ARGC_MAX args in a route-map so there is a finite limit on how
1251 * large they can make the attributes.
1252 *
1253 * Having a buffer with BGP_MAX_PACKET_SIZE_OVERFLOW allows us to avoid
1254 * bounds checking for every single attribute as we construct an
1255 * UPDATE.
1256 */
1257 peer->obuf_work =
1258 stream_new(BGP_MAX_PACKET_SIZE + BGP_MAX_PACKET_SIZE_OVERFLOW);
1259 peer->ibuf_work =
1260 ringbuf_new(BGP_MAX_PACKET_SIZE * BGP_READ_PACKET_MAX);
1261
1262 peer->scratch = stream_new(BGP_MAX_PACKET_SIZE);
1263
1264 bgp_sync_init(peer);
1265
1266 /* Get service port number. */
1267 sp = getservbyname("bgp", "tcp");
1268 peer->port = (sp == NULL) ? BGP_PORT_DEFAULT : ntohs(sp->s_port);
1269
1270 QOBJ_REG(peer, peer);
1271 return peer;
1272 }
1273
1274 /*
1275 * This function is invoked when a duplicate peer structure associated with
1276 * a neighbor is being deleted. If this about-to-be-deleted structure is
1277 * the one with all the config, then we have to copy over the info.
1278 */
1279 void peer_xfer_config(struct peer *peer_dst, struct peer *peer_src)
1280 {
1281 struct peer_af *paf;
1282 afi_t afi;
1283 safi_t safi;
1284 int afidx;
1285
1286 assert(peer_src);
1287 assert(peer_dst);
1288
1289 /* The following function is used by both peer group config copy to
1290 * individual peer and when we transfer config
1291 */
1292 if (peer_src->change_local_as)
1293 peer_dst->change_local_as = peer_src->change_local_as;
1294
1295 /* peer flags apply */
1296 peer_dst->flags = peer_src->flags;
1297 peer_dst->cap = peer_src->cap;
1298
1299 peer_dst->peer_gr_present_state = peer_src->peer_gr_present_state;
1300 peer_dst->peer_gr_new_status_flag = peer_src->peer_gr_new_status_flag;
1301
1302 peer_dst->local_as = peer_src->local_as;
1303 peer_dst->port = peer_src->port;
1304 (void)peer_sort(peer_dst);
1305 peer_dst->rmap_type = peer_src->rmap_type;
1306
1307 /* Timers */
1308 peer_dst->holdtime = peer_src->holdtime;
1309 peer_dst->keepalive = peer_src->keepalive;
1310 peer_dst->connect = peer_src->connect;
1311 peer_dst->v_holdtime = peer_src->v_holdtime;
1312 peer_dst->v_keepalive = peer_src->v_keepalive;
1313 peer_dst->routeadv = peer_src->routeadv;
1314 peer_dst->v_routeadv = peer_src->v_routeadv;
1315
1316 /* password apply */
1317 if (peer_src->password && !peer_dst->password)
1318 peer_dst->password =
1319 XSTRDUP(MTYPE_PEER_PASSWORD, peer_src->password);
1320
1321 FOREACH_AFI_SAFI (afi, safi) {
1322 peer_dst->afc[afi][safi] = peer_src->afc[afi][safi];
1323 peer_dst->af_flags[afi][safi] = peer_src->af_flags[afi][safi];
1324 peer_dst->allowas_in[afi][safi] =
1325 peer_src->allowas_in[afi][safi];
1326 peer_dst->weight[afi][safi] = peer_src->weight[afi][safi];
1327 peer_dst->addpath_type[afi][safi] =
1328 peer_src->addpath_type[afi][safi];
1329 }
1330
1331 for (afidx = BGP_AF_START; afidx < BGP_AF_MAX; afidx++) {
1332 paf = peer_src->peer_af_array[afidx];
1333 if (paf != NULL)
1334 peer_af_create(peer_dst, paf->afi, paf->safi);
1335 }
1336
1337 /* update-source apply */
1338 if (peer_src->update_source) {
1339 if (peer_dst->update_source)
1340 sockunion_free(peer_dst->update_source);
1341 XFREE(MTYPE_PEER_UPDATE_SOURCE, peer_dst->update_if);
1342 peer_dst->update_source =
1343 sockunion_dup(peer_src->update_source);
1344 } else if (peer_src->update_if) {
1345 XFREE(MTYPE_PEER_UPDATE_SOURCE, peer_dst->update_if);
1346 if (peer_dst->update_source) {
1347 sockunion_free(peer_dst->update_source);
1348 peer_dst->update_source = NULL;
1349 }
1350 peer_dst->update_if =
1351 XSTRDUP(MTYPE_PEER_UPDATE_SOURCE, peer_src->update_if);
1352 }
1353
1354 if (peer_src->ifname) {
1355 XFREE(MTYPE_BGP_PEER_IFNAME, peer_dst->ifname);
1356
1357 peer_dst->ifname =
1358 XSTRDUP(MTYPE_BGP_PEER_IFNAME, peer_src->ifname);
1359 }
1360 }
1361
1362 static int bgp_peer_conf_if_to_su_update_v4(struct peer *peer,
1363 struct interface *ifp)
1364 {
1365 struct connected *ifc;
1366 struct prefix p;
1367 uint32_t addr;
1368 struct listnode *node;
1369
1370 /* If our IPv4 address on the interface is /30 or /31, we can derive the
1371 * IPv4 address of the other end.
1372 */
1373 for (ALL_LIST_ELEMENTS_RO(ifp->connected, node, ifc)) {
1374 if (ifc->address && (ifc->address->family == AF_INET)) {
1375 PREFIX_COPY_IPV4(&p, CONNECTED_PREFIX(ifc));
1376 if (p.prefixlen == 30) {
1377 peer->su.sa.sa_family = AF_INET;
1378 addr = ntohl(p.u.prefix4.s_addr);
1379 if (addr % 4 == 1)
1380 peer->su.sin.sin_addr.s_addr =
1381 htonl(addr + 1);
1382 else if (addr % 4 == 2)
1383 peer->su.sin.sin_addr.s_addr =
1384 htonl(addr - 1);
1385 #ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN
1386 peer->su.sin.sin_len =
1387 sizeof(struct sockaddr_in);
1388 #endif /* HAVE_STRUCT_SOCKADDR_IN_SIN_LEN */
1389 return 1;
1390 } else if (p.prefixlen == 31) {
1391 peer->su.sa.sa_family = AF_INET;
1392 addr = ntohl(p.u.prefix4.s_addr);
1393 if (addr % 2 == 0)
1394 peer->su.sin.sin_addr.s_addr =
1395 htonl(addr + 1);
1396 else
1397 peer->su.sin.sin_addr.s_addr =
1398 htonl(addr - 1);
1399 #ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN
1400 peer->su.sin.sin_len =
1401 sizeof(struct sockaddr_in);
1402 #endif /* HAVE_STRUCT_SOCKADDR_IN_SIN_LEN */
1403 return 1;
1404 } else if (bgp_debug_neighbor_events(peer))
1405 zlog_debug(
1406 "%s: IPv4 interface address is not /30 or /31, v4 session not started",
1407 peer->conf_if);
1408 }
1409 }
1410
1411 return 0;
1412 }
1413
1414 static bool bgp_peer_conf_if_to_su_update_v6(struct peer *peer,
1415 struct interface *ifp)
1416 {
1417 struct nbr_connected *ifc_nbr;
1418
1419 /* Have we learnt the peer's IPv6 link-local address? */
1420 if (ifp->nbr_connected
1421 && (ifc_nbr = listnode_head(ifp->nbr_connected))) {
1422 peer->su.sa.sa_family = AF_INET6;
1423 memcpy(&peer->su.sin6.sin6_addr, &ifc_nbr->address->u.prefix,
1424 sizeof(struct in6_addr));
1425 #ifdef SIN6_LEN
1426 peer->su.sin6.sin6_len = sizeof(struct sockaddr_in6);
1427 #endif
1428 peer->su.sin6.sin6_scope_id = ifp->ifindex;
1429 return true;
1430 }
1431
1432 return false;
1433 }
1434
1435 /*
1436 * Set or reset the peer address socketunion structure based on the
1437 * learnt/derived peer address. If the address has changed, update the
1438 * password on the listen socket, if needed.
1439 */
1440 void bgp_peer_conf_if_to_su_update(struct peer *peer)
1441 {
1442 struct interface *ifp;
1443 int prev_family;
1444 int peer_addr_updated = 0;
1445
1446 if (!peer->conf_if)
1447 return;
1448
1449 /*
1450 * Our peer structure is stored in the bgp->peerhash
1451 * release it before we modify anything.
1452 */
1453 hash_release(peer->bgp->peerhash, peer);
1454
1455 prev_family = peer->su.sa.sa_family;
1456 if ((ifp = if_lookup_by_name(peer->conf_if, peer->bgp->vrf_id))) {
1457 peer->ifp = ifp;
1458 /* If BGP unnumbered is not "v6only", we first see if we can
1459 * derive the
1460 * peer's IPv4 address.
1461 */
1462 if (!CHECK_FLAG(peer->flags, PEER_FLAG_IFPEER_V6ONLY))
1463 peer_addr_updated =
1464 bgp_peer_conf_if_to_su_update_v4(peer, ifp);
1465
1466 /* If "v6only" or we can't derive peer's IPv4 address, see if
1467 * we've
1468 * learnt the peer's IPv6 link-local address. This is from the
1469 * source
1470 * IPv6 address in router advertisement.
1471 */
1472 if (!peer_addr_updated)
1473 peer_addr_updated =
1474 bgp_peer_conf_if_to_su_update_v6(peer, ifp);
1475 }
1476 /* If we could derive the peer address, we may need to install the
1477 * password
1478 * configured for the peer, if any, on the listen socket. Otherwise,
1479 * mark
1480 * that peer's address is not available and uninstall the password, if
1481 * needed.
1482 */
1483 if (peer_addr_updated) {
1484 if (CHECK_FLAG(peer->flags, PEER_FLAG_PASSWORD)
1485 && prev_family == AF_UNSPEC)
1486 bgp_md5_set(peer);
1487 } else {
1488 if (CHECK_FLAG(peer->flags, PEER_FLAG_PASSWORD)
1489 && prev_family != AF_UNSPEC)
1490 bgp_md5_unset(peer);
1491 peer->su.sa.sa_family = AF_UNSPEC;
1492 memset(&peer->su.sin6.sin6_addr, 0, sizeof(struct in6_addr));
1493 }
1494
1495 /*
1496 * Since our su changed we need to del/add peer to the peerhash
1497 */
1498 hash_get(peer->bgp->peerhash, peer, hash_alloc_intern);
1499 }
1500
1501 static void bgp_recalculate_afi_safi_bestpaths(struct bgp *bgp, afi_t afi,
1502 safi_t safi)
1503 {
1504 struct bgp_dest *dest, *ndest;
1505 struct bgp_table *table;
1506
1507 for (dest = bgp_table_top(bgp->rib[afi][safi]); dest;
1508 dest = bgp_route_next(dest)) {
1509 table = bgp_dest_get_bgp_table_info(dest);
1510 if (table != NULL) {
1511 /* Special handling for 2-level routing
1512 * tables. */
1513 if (safi == SAFI_MPLS_VPN || safi == SAFI_ENCAP
1514 || safi == SAFI_EVPN) {
1515 for (ndest = bgp_table_top(table); ndest;
1516 ndest = bgp_route_next(ndest))
1517 bgp_process(bgp, ndest, afi, safi);
1518 } else
1519 bgp_process(bgp, dest, afi, safi);
1520 }
1521 }
1522 }
1523
1524 /* Force a bestpath recalculation for all prefixes. This is used
1525 * when 'bgp bestpath' commands are entered.
1526 */
1527 void bgp_recalculate_all_bestpaths(struct bgp *bgp)
1528 {
1529 afi_t afi;
1530 safi_t safi;
1531
1532 FOREACH_AFI_SAFI (afi, safi) {
1533 bgp_recalculate_afi_safi_bestpaths(bgp, afi, safi);
1534 }
1535 }
1536
1537 /*
1538 * Create new BGP peer.
1539 *
1540 * conf_if and su are mutually exclusive if configuring from the cli.
1541 * If we are handing a doppelganger, then we *must* pass in both
1542 * the original peer's su and conf_if, so that we can appropriately
1543 * track the bgp->peerhash( ie we don't want to remove the current
1544 * one from the config ).
1545 */
1546 struct peer *peer_create(union sockunion *su, const char *conf_if,
1547 struct bgp *bgp, as_t local_as, as_t remote_as,
1548 int as_type, afi_t afi, safi_t safi,
1549 struct peer_group *group)
1550 {
1551 int active;
1552 struct peer *peer;
1553 char buf[SU_ADDRSTRLEN];
1554
1555 peer = peer_new(bgp);
1556 if (conf_if) {
1557 peer->conf_if = XSTRDUP(MTYPE_PEER_CONF_IF, conf_if);
1558 if (su)
1559 peer->su = *su;
1560 else
1561 bgp_peer_conf_if_to_su_update(peer);
1562 XFREE(MTYPE_BGP_PEER_HOST, peer->host);
1563 peer->host = XSTRDUP(MTYPE_BGP_PEER_HOST, conf_if);
1564 } else if (su) {
1565 peer->su = *su;
1566 sockunion2str(su, buf, SU_ADDRSTRLEN);
1567 XFREE(MTYPE_BGP_PEER_HOST, peer->host);
1568 peer->host = XSTRDUP(MTYPE_BGP_PEER_HOST, buf);
1569 }
1570 peer->local_as = local_as;
1571 peer->as = remote_as;
1572 peer->as_type = as_type;
1573 peer->local_id = bgp->router_id;
1574 peer->v_holdtime = bgp->default_holdtime;
1575 peer->v_keepalive = bgp->default_keepalive;
1576 peer->v_routeadv = (peer_sort(peer) == BGP_PEER_IBGP)
1577 ? BGP_DEFAULT_IBGP_ROUTEADV
1578 : BGP_DEFAULT_EBGP_ROUTEADV;
1579
1580 peer = peer_lock(peer); /* bgp peer list reference */
1581 peer->group = group;
1582 listnode_add_sort(bgp->peer, peer);
1583 hash_get(bgp->peerhash, peer, hash_alloc_intern);
1584
1585 /* Adjust update-group coalesce timer heuristics for # peers. */
1586 if (bgp->heuristic_coalesce) {
1587 long ct = BGP_DEFAULT_SUBGROUP_COALESCE_TIME
1588 + (bgp->peer->count
1589 * BGP_PEER_ADJUST_SUBGROUP_COALESCE_TIME);
1590 bgp->coalesce_time = MIN(BGP_MAX_SUBGROUP_COALESCE_TIME, ct);
1591 }
1592
1593 active = peer_active(peer);
1594 if (!active) {
1595 if (peer->su.sa.sa_family == AF_UNSPEC)
1596 peer->last_reset = PEER_DOWN_NBR_ADDR;
1597 else
1598 peer->last_reset = PEER_DOWN_NOAFI_ACTIVATED;
1599 }
1600
1601 /* Last read and reset time set */
1602 peer->readtime = peer->resettime = bgp_clock();
1603
1604 /* Default TTL set. */
1605 peer->ttl = (peer->sort == BGP_PEER_IBGP) ? MAXTTL : BGP_DEFAULT_TTL;
1606
1607 SET_FLAG(peer->flags, PEER_FLAG_CONFIG_NODE);
1608
1609 if (afi && safi) {
1610 peer->afc[afi][safi] = 1;
1611 peer_af_create(peer, afi, safi);
1612 }
1613
1614 /* auto shutdown if configured */
1615 if (bgp->autoshutdown)
1616 peer_flag_set(peer, PEER_FLAG_SHUTDOWN);
1617 /* Set up peer's events and timers. */
1618 else if (!active && peer_active(peer))
1619 bgp_timer_set(peer);
1620
1621 bgp_peer_gr_flags_update(peer);
1622 BGP_GR_ROUTER_DETECT_AND_SEND_CAPABILITY_TO_ZEBRA(bgp, bgp->peer);
1623
1624 return peer;
1625 }
1626
1627 /* Make accept BGP peer. This function is only called from the test code */
1628 struct peer *peer_create_accept(struct bgp *bgp)
1629 {
1630 struct peer *peer;
1631
1632 peer = peer_new(bgp);
1633
1634 peer = peer_lock(peer); /* bgp peer list reference */
1635 listnode_add_sort(bgp->peer, peer);
1636
1637 return peer;
1638 }
1639
1640 /*
1641 * Return true if we have a peer configured to use this afi/safi
1642 */
1643 int bgp_afi_safi_peer_exists(struct bgp *bgp, afi_t afi, safi_t safi)
1644 {
1645 struct listnode *node;
1646 struct peer *peer;
1647
1648 for (ALL_LIST_ELEMENTS_RO(bgp->peer, node, peer)) {
1649 if (!CHECK_FLAG(peer->flags, PEER_FLAG_CONFIG_NODE))
1650 continue;
1651
1652 if (peer->afc[afi][safi])
1653 return 1;
1654 }
1655
1656 return 0;
1657 }
1658
1659 /* Change peer's AS number. */
1660 void peer_as_change(struct peer *peer, as_t as, int as_specified)
1661 {
1662 bgp_peer_sort_t origtype, newtype;
1663
1664 /* Stop peer. */
1665 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
1666 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status)) {
1667 peer->last_reset = PEER_DOWN_REMOTE_AS_CHANGE;
1668 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
1669 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
1670 } else
1671 bgp_session_reset(peer);
1672 }
1673 origtype = peer_sort_lookup(peer);
1674 peer->as = as;
1675 peer->as_type = as_specified;
1676
1677 if (bgp_config_check(peer->bgp, BGP_CONFIG_CONFEDERATION)
1678 && !bgp_confederation_peers_check(peer->bgp, as)
1679 && peer->bgp->as != as)
1680 peer->local_as = peer->bgp->confed_id;
1681 else
1682 peer->local_as = peer->bgp->as;
1683
1684 newtype = peer_sort(peer);
1685 /* Advertisement-interval reset */
1686 if (!CHECK_FLAG(peer->flags, PEER_FLAG_ROUTEADV)) {
1687 peer->v_routeadv = (newtype == BGP_PEER_IBGP)
1688 ? BGP_DEFAULT_IBGP_ROUTEADV
1689 : BGP_DEFAULT_EBGP_ROUTEADV;
1690 }
1691
1692 /* TTL reset */
1693 if (newtype == BGP_PEER_IBGP)
1694 peer->ttl = MAXTTL;
1695 else if (origtype == BGP_PEER_IBGP)
1696 peer->ttl = BGP_DEFAULT_TTL;
1697
1698 /* reflector-client reset */
1699 if (newtype != BGP_PEER_IBGP) {
1700 UNSET_FLAG(peer->af_flags[AFI_IP][SAFI_UNICAST],
1701 PEER_FLAG_REFLECTOR_CLIENT);
1702 UNSET_FLAG(peer->af_flags[AFI_IP][SAFI_MULTICAST],
1703 PEER_FLAG_REFLECTOR_CLIENT);
1704 UNSET_FLAG(peer->af_flags[AFI_IP][SAFI_LABELED_UNICAST],
1705 PEER_FLAG_REFLECTOR_CLIENT);
1706 UNSET_FLAG(peer->af_flags[AFI_IP][SAFI_MPLS_VPN],
1707 PEER_FLAG_REFLECTOR_CLIENT);
1708 UNSET_FLAG(peer->af_flags[AFI_IP][SAFI_ENCAP],
1709 PEER_FLAG_REFLECTOR_CLIENT);
1710 UNSET_FLAG(peer->af_flags[AFI_IP][SAFI_FLOWSPEC],
1711 PEER_FLAG_REFLECTOR_CLIENT);
1712 UNSET_FLAG(peer->af_flags[AFI_IP6][SAFI_UNICAST],
1713 PEER_FLAG_REFLECTOR_CLIENT);
1714 UNSET_FLAG(peer->af_flags[AFI_IP6][SAFI_MULTICAST],
1715 PEER_FLAG_REFLECTOR_CLIENT);
1716 UNSET_FLAG(peer->af_flags[AFI_IP6][SAFI_LABELED_UNICAST],
1717 PEER_FLAG_REFLECTOR_CLIENT);
1718 UNSET_FLAG(peer->af_flags[AFI_IP6][SAFI_MPLS_VPN],
1719 PEER_FLAG_REFLECTOR_CLIENT);
1720 UNSET_FLAG(peer->af_flags[AFI_IP6][SAFI_ENCAP],
1721 PEER_FLAG_REFLECTOR_CLIENT);
1722 UNSET_FLAG(peer->af_flags[AFI_IP6][SAFI_FLOWSPEC],
1723 PEER_FLAG_REFLECTOR_CLIENT);
1724 UNSET_FLAG(peer->af_flags[AFI_L2VPN][SAFI_EVPN],
1725 PEER_FLAG_REFLECTOR_CLIENT);
1726 }
1727
1728 /* local-as reset */
1729 if (newtype != BGP_PEER_EBGP) {
1730 peer->change_local_as = 0;
1731 peer_flag_unset(peer, PEER_FLAG_LOCAL_AS);
1732 peer_flag_unset(peer, PEER_FLAG_LOCAL_AS_NO_PREPEND);
1733 peer_flag_unset(peer, PEER_FLAG_LOCAL_AS_REPLACE_AS);
1734 }
1735 }
1736
1737 /* If peer does not exist, create new one. If peer already exists,
1738 set AS number to the peer. */
1739 int peer_remote_as(struct bgp *bgp, union sockunion *su, const char *conf_if,
1740 as_t *as, int as_type, afi_t afi, safi_t safi)
1741 {
1742 struct peer *peer;
1743 as_t local_as;
1744
1745 if (conf_if)
1746 peer = peer_lookup_by_conf_if(bgp, conf_if);
1747 else
1748 peer = peer_lookup(bgp, su);
1749
1750 if (peer) {
1751 /* Not allowed for a dynamic peer. */
1752 if (peer_dynamic_neighbor(peer)) {
1753 *as = peer->as;
1754 return BGP_ERR_INVALID_FOR_DYNAMIC_PEER;
1755 }
1756
1757 /* When this peer is a member of peer-group. */
1758 if (peer->group) {
1759 /* peer-group already has AS number/internal/external */
1760 if (peer->group->conf->as
1761 || peer->group->conf->as_type) {
1762 /* Return peer group's AS number. */
1763 *as = peer->group->conf->as;
1764 return BGP_ERR_PEER_GROUP_MEMBER;
1765 }
1766
1767 bgp_peer_sort_t peer_sort_type =
1768 peer_sort(peer->group->conf);
1769
1770 /* Explicit AS numbers used, compare AS numbers */
1771 if (as_type == AS_SPECIFIED) {
1772 if (((peer_sort_type == BGP_PEER_IBGP)
1773 && (bgp->as != *as))
1774 || ((peer_sort_type == BGP_PEER_EBGP)
1775 && (bgp->as == *as))) {
1776 *as = peer->as;
1777 return BGP_ERR_PEER_GROUP_PEER_TYPE_DIFFERENT;
1778 }
1779 } else {
1780 /* internal/external used, compare as-types */
1781 if (((peer_sort_type == BGP_PEER_IBGP)
1782 && (as_type != AS_INTERNAL))
1783 || ((peer_sort_type == BGP_PEER_EBGP)
1784 && (as_type != AS_EXTERNAL))) {
1785 *as = peer->as;
1786 return BGP_ERR_PEER_GROUP_PEER_TYPE_DIFFERENT;
1787 }
1788 }
1789 }
1790
1791 /* Existing peer's AS number change. */
1792 if (((peer->as_type == AS_SPECIFIED) && peer->as != *as)
1793 || (peer->as_type != as_type))
1794 peer_as_change(peer, *as, as_type);
1795 } else {
1796 if (conf_if)
1797 return BGP_ERR_NO_INTERFACE_CONFIG;
1798
1799 /* If the peer is not part of our confederation, and its not an
1800 iBGP peer then spoof the source AS */
1801 if (bgp_config_check(bgp, BGP_CONFIG_CONFEDERATION)
1802 && !bgp_confederation_peers_check(bgp, *as)
1803 && bgp->as != *as)
1804 local_as = bgp->confed_id;
1805 else
1806 local_as = bgp->as;
1807
1808 /* If this is IPv4 unicast configuration and "no bgp default
1809 ipv4-unicast" is specified. */
1810
1811 if (CHECK_FLAG(bgp->flags, BGP_FLAG_NO_DEFAULT_IPV4)
1812 && afi == AFI_IP && safi == SAFI_UNICAST)
1813 peer_create(su, conf_if, bgp, local_as, *as, as_type, 0,
1814 0, NULL);
1815 else
1816 peer_create(su, conf_if, bgp, local_as, *as, as_type,
1817 afi, safi, NULL);
1818 }
1819
1820 return 0;
1821 }
1822
1823 static void peer_group2peer_config_copy_af(struct peer_group *group,
1824 struct peer *peer, afi_t afi,
1825 safi_t safi)
1826 {
1827 int in = FILTER_IN;
1828 int out = FILTER_OUT;
1829 uint32_t flags_tmp;
1830 uint32_t pflags_ovrd;
1831 uint8_t *pfilter_ovrd;
1832 struct peer *conf;
1833
1834 conf = group->conf;
1835 pflags_ovrd = peer->af_flags_override[afi][safi];
1836 pfilter_ovrd = &peer->filter_override[afi][safi][in];
1837
1838 /* peer af_flags apply */
1839 flags_tmp = conf->af_flags[afi][safi] & ~pflags_ovrd;
1840 flags_tmp ^= conf->af_flags_invert[afi][safi]
1841 ^ peer->af_flags_invert[afi][safi];
1842 flags_tmp &= ~pflags_ovrd;
1843
1844 UNSET_FLAG(peer->af_flags[afi][safi], ~pflags_ovrd);
1845 SET_FLAG(peer->af_flags[afi][safi], flags_tmp);
1846 SET_FLAG(peer->af_flags_invert[afi][safi],
1847 conf->af_flags_invert[afi][safi]);
1848
1849 /* maximum-prefix */
1850 if (!CHECK_FLAG(pflags_ovrd, PEER_FLAG_MAX_PREFIX)) {
1851 PEER_ATTR_INHERIT(peer, group, pmax[afi][safi]);
1852 PEER_ATTR_INHERIT(peer, group, pmax_threshold[afi][safi]);
1853 PEER_ATTR_INHERIT(peer, group, pmax_restart[afi][safi]);
1854 }
1855
1856 /* allowas-in */
1857 if (!CHECK_FLAG(pflags_ovrd, PEER_FLAG_ALLOWAS_IN))
1858 PEER_ATTR_INHERIT(peer, group, allowas_in[afi][safi]);
1859
1860 /* weight */
1861 if (!CHECK_FLAG(pflags_ovrd, PEER_FLAG_WEIGHT))
1862 PEER_ATTR_INHERIT(peer, group, weight[afi][safi]);
1863
1864 /* default-originate route-map */
1865 if (!CHECK_FLAG(pflags_ovrd, PEER_FLAG_DEFAULT_ORIGINATE)) {
1866 PEER_STR_ATTR_INHERIT(peer, group, default_rmap[afi][safi].name,
1867 MTYPE_ROUTE_MAP_NAME);
1868 PEER_ATTR_INHERIT(peer, group, default_rmap[afi][safi].map);
1869 }
1870
1871 /* inbound filter apply */
1872 if (!CHECK_FLAG(pfilter_ovrd[in], PEER_FT_DISTRIBUTE_LIST)) {
1873 PEER_STR_ATTR_INHERIT(peer, group,
1874 filter[afi][safi].dlist[in].name,
1875 MTYPE_BGP_FILTER_NAME);
1876 PEER_ATTR_INHERIT(peer, group,
1877 filter[afi][safi].dlist[in].alist);
1878 }
1879
1880 if (!CHECK_FLAG(pfilter_ovrd[in], PEER_FT_PREFIX_LIST)) {
1881 PEER_STR_ATTR_INHERIT(peer, group,
1882 filter[afi][safi].plist[in].name,
1883 MTYPE_BGP_FILTER_NAME);
1884 PEER_ATTR_INHERIT(peer, group,
1885 filter[afi][safi].plist[in].plist);
1886 }
1887
1888 if (!CHECK_FLAG(pfilter_ovrd[in], PEER_FT_FILTER_LIST)) {
1889 PEER_STR_ATTR_INHERIT(peer, group,
1890 filter[afi][safi].aslist[in].name,
1891 MTYPE_BGP_FILTER_NAME);
1892 PEER_ATTR_INHERIT(peer, group,
1893 filter[afi][safi].aslist[in].aslist);
1894 }
1895
1896 if (!CHECK_FLAG(pfilter_ovrd[RMAP_IN], PEER_FT_ROUTE_MAP)) {
1897 PEER_STR_ATTR_INHERIT(peer, group,
1898 filter[afi][safi].map[in].name,
1899 MTYPE_BGP_FILTER_NAME);
1900 PEER_ATTR_INHERIT(peer, group,
1901 filter[afi][safi].map[RMAP_IN].map);
1902 }
1903
1904 /* outbound filter apply */
1905 if (!CHECK_FLAG(pfilter_ovrd[out], PEER_FT_DISTRIBUTE_LIST)) {
1906 PEER_STR_ATTR_INHERIT(peer, group,
1907 filter[afi][safi].dlist[out].name,
1908 MTYPE_BGP_FILTER_NAME);
1909 PEER_ATTR_INHERIT(peer, group,
1910 filter[afi][safi].dlist[out].alist);
1911 }
1912
1913 if (!CHECK_FLAG(pfilter_ovrd[out], PEER_FT_PREFIX_LIST)) {
1914 PEER_STR_ATTR_INHERIT(peer, group,
1915 filter[afi][safi].plist[out].name,
1916 MTYPE_BGP_FILTER_NAME);
1917 PEER_ATTR_INHERIT(peer, group,
1918 filter[afi][safi].plist[out].plist);
1919 }
1920
1921 if (!CHECK_FLAG(pfilter_ovrd[out], PEER_FT_FILTER_LIST)) {
1922 PEER_STR_ATTR_INHERIT(peer, group,
1923 filter[afi][safi].aslist[out].name,
1924 MTYPE_BGP_FILTER_NAME);
1925 PEER_ATTR_INHERIT(peer, group,
1926 filter[afi][safi].aslist[out].aslist);
1927 }
1928
1929 if (!CHECK_FLAG(pfilter_ovrd[RMAP_OUT], PEER_FT_ROUTE_MAP)) {
1930 PEER_STR_ATTR_INHERIT(peer, group,
1931 filter[afi][safi].map[RMAP_OUT].name,
1932 MTYPE_BGP_FILTER_NAME);
1933 PEER_ATTR_INHERIT(peer, group,
1934 filter[afi][safi].map[RMAP_OUT].map);
1935 }
1936
1937 /* nondirectional filter apply */
1938 if (!CHECK_FLAG(pfilter_ovrd[0], PEER_FT_UNSUPPRESS_MAP)) {
1939 PEER_STR_ATTR_INHERIT(peer, group, filter[afi][safi].usmap.name,
1940 MTYPE_BGP_FILTER_NAME);
1941 PEER_ATTR_INHERIT(peer, group, filter[afi][safi].usmap.map);
1942 }
1943
1944 if (peer->addpath_type[afi][safi] == BGP_ADDPATH_NONE) {
1945 peer->addpath_type[afi][safi] = conf->addpath_type[afi][safi];
1946 bgp_addpath_type_changed(conf->bgp);
1947 }
1948 }
1949
1950 static int peer_activate_af(struct peer *peer, afi_t afi, safi_t safi)
1951 {
1952 int active;
1953 struct peer *other;
1954
1955 if (CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
1956 flog_err(EC_BGP_PEER_GROUP, "%s was called for peer-group %s",
1957 __func__, peer->host);
1958 return 1;
1959 }
1960
1961 /* Do not activate a peer for both SAFI_UNICAST and SAFI_LABELED_UNICAST
1962 */
1963 if ((safi == SAFI_UNICAST && peer->afc[afi][SAFI_LABELED_UNICAST])
1964 || (safi == SAFI_LABELED_UNICAST && peer->afc[afi][SAFI_UNICAST]))
1965 return BGP_ERR_PEER_SAFI_CONFLICT;
1966
1967 /* Nothing to do if we've already activated this peer */
1968 if (peer->afc[afi][safi])
1969 return 0;
1970
1971 if (peer_af_create(peer, afi, safi) == NULL)
1972 return 1;
1973
1974 active = peer_active(peer);
1975 peer->afc[afi][safi] = 1;
1976
1977 if (peer->group)
1978 peer_group2peer_config_copy_af(peer->group, peer, afi, safi);
1979
1980 if (!active && peer_active(peer)) {
1981 bgp_timer_set(peer);
1982 } else {
1983 if (peer->status == Established) {
1984 if (CHECK_FLAG(peer->cap, PEER_CAP_DYNAMIC_RCV)) {
1985 peer->afc_adv[afi][safi] = 1;
1986 bgp_capability_send(peer, afi, safi,
1987 CAPABILITY_CODE_MP,
1988 CAPABILITY_ACTION_SET);
1989 if (peer->afc_recv[afi][safi]) {
1990 peer->afc_nego[afi][safi] = 1;
1991 bgp_announce_route(peer, afi, safi);
1992 }
1993 } else {
1994 peer->last_reset = PEER_DOWN_AF_ACTIVATE;
1995 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
1996 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
1997 }
1998 }
1999 if (peer->status == OpenSent || peer->status == OpenConfirm) {
2000 peer->last_reset = PEER_DOWN_AF_ACTIVATE;
2001 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
2002 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
2003 }
2004 /*
2005 * If we are turning on a AFI/SAFI locally and we've
2006 * started bringing a peer up, we need to tell
2007 * the other peer to restart because we might loose
2008 * configuration here because when the doppelganger
2009 * gets to a established state due to how
2010 * we resolve we could just overwrite the afi/safi
2011 * activation.
2012 */
2013 other = peer->doppelganger;
2014 if (other
2015 && (other->status == OpenSent
2016 || other->status == OpenConfirm)) {
2017 other->last_reset = PEER_DOWN_AF_ACTIVATE;
2018 bgp_notify_send(other, BGP_NOTIFY_CEASE,
2019 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
2020 }
2021 }
2022
2023 return 0;
2024 }
2025
2026 /* Activate the peer or peer group for specified AFI and SAFI. */
2027 int peer_activate(struct peer *peer, afi_t afi, safi_t safi)
2028 {
2029 int ret = 0;
2030 struct peer_group *group;
2031 struct listnode *node, *nnode;
2032 struct peer *tmp_peer;
2033 struct bgp *bgp;
2034
2035 /* Nothing to do if we've already activated this peer */
2036 if (peer->afc[afi][safi])
2037 return ret;
2038
2039 bgp = peer->bgp;
2040
2041 /* This is a peer-group so activate all of the members of the
2042 * peer-group as well */
2043 if (CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
2044
2045 /* Do not activate a peer for both SAFI_UNICAST and
2046 * SAFI_LABELED_UNICAST */
2047 if ((safi == SAFI_UNICAST
2048 && peer->afc[afi][SAFI_LABELED_UNICAST])
2049 || (safi == SAFI_LABELED_UNICAST
2050 && peer->afc[afi][SAFI_UNICAST]))
2051 return BGP_ERR_PEER_SAFI_CONFLICT;
2052
2053 peer->afc[afi][safi] = 1;
2054 group = peer->group;
2055
2056 for (ALL_LIST_ELEMENTS(group->peer, node, nnode, tmp_peer)) {
2057 ret |= peer_activate_af(tmp_peer, afi, safi);
2058 }
2059 } else {
2060 ret |= peer_activate_af(peer, afi, safi);
2061 }
2062
2063 /* If this is the first peer to be activated for this
2064 * afi/labeled-unicast recalc bestpaths to trigger label allocation */
2065 if (safi == SAFI_LABELED_UNICAST
2066 && !bgp->allocate_mpls_labels[afi][SAFI_UNICAST]) {
2067
2068 if (BGP_DEBUG(zebra, ZEBRA))
2069 zlog_debug(
2070 "peer(s) are now active for labeled-unicast, allocate MPLS labels");
2071
2072 bgp->allocate_mpls_labels[afi][SAFI_UNICAST] = 1;
2073 bgp_recalculate_afi_safi_bestpaths(bgp, afi, SAFI_UNICAST);
2074 }
2075
2076 if (safi == SAFI_FLOWSPEC) {
2077 /* connect to table manager */
2078 bgp_zebra_init_tm_connect(bgp);
2079 }
2080 return ret;
2081 }
2082
2083 static bool non_peergroup_deactivate_af(struct peer *peer, afi_t afi,
2084 safi_t safi)
2085 {
2086 if (CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
2087 flog_err(EC_BGP_PEER_GROUP, "%s was called for peer-group %s",
2088 __func__, peer->host);
2089 return true;
2090 }
2091
2092 /* Nothing to do if we've already deactivated this peer */
2093 if (!peer->afc[afi][safi])
2094 return false;
2095
2096 /* De-activate the address family configuration. */
2097 peer->afc[afi][safi] = 0;
2098
2099 if (peer_af_delete(peer, afi, safi) != 0) {
2100 flog_err(EC_BGP_PEER_DELETE,
2101 "couldn't delete af structure for peer %s(%s, %s)",
2102 peer->host, afi2str(afi), safi2str(safi));
2103 return true;
2104 }
2105
2106 if (peer->status == Established) {
2107 if (CHECK_FLAG(peer->cap, PEER_CAP_DYNAMIC_RCV)) {
2108 peer->afc_adv[afi][safi] = 0;
2109 peer->afc_nego[afi][safi] = 0;
2110
2111 if (peer_active_nego(peer)) {
2112 bgp_capability_send(peer, afi, safi,
2113 CAPABILITY_CODE_MP,
2114 CAPABILITY_ACTION_UNSET);
2115 bgp_clear_route(peer, afi, safi);
2116 peer->pcount[afi][safi] = 0;
2117 } else {
2118 peer->last_reset = PEER_DOWN_NEIGHBOR_DELETE;
2119 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
2120 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
2121 }
2122 } else {
2123 peer->last_reset = PEER_DOWN_NEIGHBOR_DELETE;
2124 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
2125 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
2126 }
2127 }
2128
2129 return false;
2130 }
2131
2132 int peer_deactivate(struct peer *peer, afi_t afi, safi_t safi)
2133 {
2134 int ret = 0;
2135 struct peer_group *group;
2136 struct peer *tmp_peer;
2137 struct listnode *node, *nnode;
2138 struct bgp *bgp;
2139
2140 /* Nothing to do if we've already de-activated this peer */
2141 if (!peer->afc[afi][safi])
2142 return ret;
2143
2144 /* This is a peer-group so de-activate all of the members of the
2145 * peer-group as well */
2146 if (CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
2147 peer->afc[afi][safi] = 0;
2148 group = peer->group;
2149
2150 if (peer_af_delete(peer, afi, safi) != 0) {
2151 flog_err(
2152 EC_BGP_PEER_DELETE,
2153 "couldn't delete af structure for peer %s(%s, %s)",
2154 peer->host, afi2str(afi), safi2str(safi));
2155 }
2156
2157 for (ALL_LIST_ELEMENTS(group->peer, node, nnode, tmp_peer)) {
2158 ret |= non_peergroup_deactivate_af(tmp_peer, afi, safi);
2159 }
2160 } else {
2161 ret |= non_peergroup_deactivate_af(peer, afi, safi);
2162 }
2163
2164 bgp = peer->bgp;
2165
2166 /* If this is the last peer to be deactivated for this
2167 * afi/labeled-unicast recalc bestpaths to trigger label deallocation */
2168 if (safi == SAFI_LABELED_UNICAST
2169 && bgp->allocate_mpls_labels[afi][SAFI_UNICAST]
2170 && !bgp_afi_safi_peer_exists(bgp, afi, safi)) {
2171
2172 if (BGP_DEBUG(zebra, ZEBRA))
2173 zlog_debug(
2174 "peer(s) are no longer active for labeled-unicast, deallocate MPLS labels");
2175
2176 bgp->allocate_mpls_labels[afi][SAFI_UNICAST] = 0;
2177 bgp_recalculate_afi_safi_bestpaths(bgp, afi, SAFI_UNICAST);
2178 }
2179 return ret;
2180 }
2181
2182 void peer_nsf_stop(struct peer *peer)
2183 {
2184 afi_t afi;
2185 safi_t safi;
2186
2187 UNSET_FLAG(peer->sflags, PEER_STATUS_NSF_WAIT);
2188 UNSET_FLAG(peer->sflags, PEER_STATUS_NSF_MODE);
2189
2190 for (afi = AFI_IP; afi < AFI_MAX; afi++)
2191 for (safi = SAFI_UNICAST; safi <= SAFI_MPLS_VPN; safi++)
2192 peer->nsf[afi][safi] = 0;
2193
2194 if (peer->t_gr_restart) {
2195 BGP_TIMER_OFF(peer->t_gr_restart);
2196 if (bgp_debug_neighbor_events(peer))
2197 zlog_debug("%s graceful restart timer stopped",
2198 peer->host);
2199 }
2200 if (peer->t_gr_stale) {
2201 BGP_TIMER_OFF(peer->t_gr_stale);
2202 if (bgp_debug_neighbor_events(peer))
2203 zlog_debug(
2204 "%s graceful restart stalepath timer stopped",
2205 peer->host);
2206 }
2207 bgp_clear_route_all(peer);
2208 }
2209
2210 /* Delete peer from confguration.
2211 *
2212 * The peer is moved to a dead-end "Deleted" neighbour-state, to allow
2213 * it to "cool off" and refcounts to hit 0, at which state it is freed.
2214 *
2215 * This function /should/ take care to be idempotent, to guard against
2216 * it being called multiple times through stray events that come in
2217 * that happen to result in this function being called again. That
2218 * said, getting here for a "Deleted" peer is a bug in the neighbour
2219 * FSM.
2220 */
2221 int peer_delete(struct peer *peer)
2222 {
2223 int i;
2224 afi_t afi;
2225 safi_t safi;
2226 struct bgp *bgp;
2227 struct bgp_filter *filter;
2228 struct listnode *pn;
2229 int accept_peer;
2230
2231 assert(peer->status != Deleted);
2232
2233 bgp = peer->bgp;
2234 accept_peer = CHECK_FLAG(peer->sflags, PEER_STATUS_ACCEPT_PEER);
2235
2236 bgp_keepalives_off(peer);
2237 bgp_reads_off(peer);
2238 bgp_writes_off(peer);
2239 assert(!CHECK_FLAG(peer->thread_flags, PEER_THREAD_WRITES_ON));
2240 assert(!CHECK_FLAG(peer->thread_flags, PEER_THREAD_READS_ON));
2241 assert(!CHECK_FLAG(peer->thread_flags, PEER_THREAD_KEEPALIVES_ON));
2242
2243 if (CHECK_FLAG(peer->sflags, PEER_STATUS_NSF_WAIT))
2244 peer_nsf_stop(peer);
2245
2246 SET_FLAG(peer->flags, PEER_FLAG_DELETE);
2247
2248 bgp_bfd_deregister_peer(peer);
2249
2250 /* If this peer belongs to peer group, clear up the
2251 relationship. */
2252 if (peer->group) {
2253 if (peer_dynamic_neighbor(peer))
2254 peer_drop_dynamic_neighbor(peer);
2255
2256 if ((pn = listnode_lookup(peer->group->peer, peer))) {
2257 peer = peer_unlock(
2258 peer); /* group->peer list reference */
2259 list_delete_node(peer->group->peer, pn);
2260 }
2261 peer->group = NULL;
2262 }
2263
2264 /* Withdraw all information from routing table. We can not use
2265 * BGP_EVENT_ADD (peer, BGP_Stop) at here. Because the event is
2266 * executed after peer structure is deleted.
2267 */
2268 peer->last_reset = PEER_DOWN_NEIGHBOR_DELETE;
2269 bgp_stop(peer);
2270 UNSET_FLAG(peer->flags, PEER_FLAG_DELETE);
2271
2272 if (peer->doppelganger) {
2273 peer->doppelganger->doppelganger = NULL;
2274 peer->doppelganger = NULL;
2275 }
2276
2277 UNSET_FLAG(peer->sflags, PEER_STATUS_ACCEPT_PEER);
2278 bgp_fsm_change_status(peer, Deleted);
2279
2280 /* Remove from NHT */
2281 if (CHECK_FLAG(peer->flags, PEER_FLAG_CONFIG_NODE))
2282 bgp_unlink_nexthop_by_peer(peer);
2283
2284 /* Password configuration */
2285 if (CHECK_FLAG(peer->flags, PEER_FLAG_PASSWORD)) {
2286 XFREE(MTYPE_PEER_PASSWORD, peer->password);
2287
2288 if (!accept_peer && !BGP_PEER_SU_UNSPEC(peer)
2289 && !CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP))
2290 bgp_md5_unset(peer);
2291 }
2292
2293 bgp_timer_set(peer); /* stops all timers for Deleted */
2294
2295 /* Delete from all peer list. */
2296 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)
2297 && (pn = listnode_lookup(bgp->peer, peer))) {
2298 peer_unlock(peer); /* bgp peer list reference */
2299 list_delete_node(bgp->peer, pn);
2300 hash_release(bgp->peerhash, peer);
2301 }
2302
2303 /* Buffers. */
2304 if (peer->ibuf) {
2305 stream_fifo_free(peer->ibuf);
2306 peer->ibuf = NULL;
2307 }
2308
2309 if (peer->obuf) {
2310 stream_fifo_free(peer->obuf);
2311 peer->obuf = NULL;
2312 }
2313
2314 if (peer->ibuf_work) {
2315 ringbuf_del(peer->ibuf_work);
2316 peer->ibuf_work = NULL;
2317 }
2318
2319 if (peer->obuf_work) {
2320 stream_free(peer->obuf_work);
2321 peer->obuf_work = NULL;
2322 }
2323
2324 if (peer->scratch) {
2325 stream_free(peer->scratch);
2326 peer->scratch = NULL;
2327 }
2328
2329 /* Local and remote addresses. */
2330 if (peer->su_local) {
2331 sockunion_free(peer->su_local);
2332 peer->su_local = NULL;
2333 }
2334
2335 if (peer->su_remote) {
2336 sockunion_free(peer->su_remote);
2337 peer->su_remote = NULL;
2338 }
2339
2340 /* Free filter related memory. */
2341 FOREACH_AFI_SAFI (afi, safi) {
2342 filter = &peer->filter[afi][safi];
2343
2344 for (i = FILTER_IN; i < FILTER_MAX; i++) {
2345 XFREE(MTYPE_BGP_FILTER_NAME, filter->dlist[i].name);
2346 XFREE(MTYPE_BGP_FILTER_NAME, filter->plist[i].name);
2347 XFREE(MTYPE_BGP_FILTER_NAME, filter->aslist[i].name);
2348 }
2349
2350 for (i = RMAP_IN; i < RMAP_MAX; i++) {
2351 XFREE(MTYPE_BGP_FILTER_NAME, filter->map[i].name);
2352 }
2353
2354 XFREE(MTYPE_BGP_FILTER_NAME, filter->usmap.name);
2355 XFREE(MTYPE_ROUTE_MAP_NAME, peer->default_rmap[afi][safi].name);
2356 }
2357
2358 FOREACH_AFI_SAFI (afi, safi)
2359 peer_af_delete(peer, afi, safi);
2360
2361 XFREE(MTYPE_BGP_PEER_HOST, peer->hostname);
2362 XFREE(MTYPE_BGP_PEER_HOST, peer->domainname);
2363
2364 peer_unlock(peer); /* initial reference */
2365
2366 return 0;
2367 }
2368
2369 static int peer_group_cmp(struct peer_group *g1, struct peer_group *g2)
2370 {
2371 return strcmp(g1->name, g2->name);
2372 }
2373
2374 /* Peer group cofiguration. */
2375 static struct peer_group *peer_group_new(void)
2376 {
2377 return XCALLOC(MTYPE_PEER_GROUP, sizeof(struct peer_group));
2378 }
2379
2380 static void peer_group_free(struct peer_group *group)
2381 {
2382 XFREE(MTYPE_PEER_GROUP, group);
2383 }
2384
2385 struct peer_group *peer_group_lookup(struct bgp *bgp, const char *name)
2386 {
2387 struct peer_group *group;
2388 struct listnode *node, *nnode;
2389
2390 for (ALL_LIST_ELEMENTS(bgp->group, node, nnode, group)) {
2391 if (strcmp(group->name, name) == 0)
2392 return group;
2393 }
2394 return NULL;
2395 }
2396
2397 struct peer_group *peer_group_get(struct bgp *bgp, const char *name)
2398 {
2399 struct peer_group *group;
2400 afi_t afi;
2401
2402 group = peer_group_lookup(bgp, name);
2403 if (group)
2404 return group;
2405
2406 group = peer_group_new();
2407 group->bgp = bgp;
2408 XFREE(MTYPE_PEER_GROUP_HOST, group->name);
2409 group->name = XSTRDUP(MTYPE_PEER_GROUP_HOST, name);
2410 group->peer = list_new();
2411 for (afi = AFI_IP; afi < AFI_MAX; afi++)
2412 group->listen_range[afi] = list_new();
2413 group->conf = peer_new(bgp);
2414 if (!CHECK_FLAG(bgp->flags, BGP_FLAG_NO_DEFAULT_IPV4))
2415 group->conf->afc[AFI_IP][SAFI_UNICAST] = 1;
2416 XFREE(MTYPE_BGP_PEER_HOST, group->conf->host);
2417 group->conf->host = XSTRDUP(MTYPE_BGP_PEER_HOST, name);
2418 group->conf->group = group;
2419 group->conf->as = 0;
2420 group->conf->ttl = BGP_DEFAULT_TTL;
2421 group->conf->gtsm_hops = BGP_GTSM_HOPS_DISABLED;
2422 group->conf->v_routeadv = BGP_DEFAULT_EBGP_ROUTEADV;
2423 SET_FLAG(group->conf->sflags, PEER_STATUS_GROUP);
2424 listnode_add_sort(bgp->group, group);
2425
2426 return group;
2427 }
2428
2429 static void peer_group2peer_config_copy(struct peer_group *group,
2430 struct peer *peer)
2431 {
2432 uint32_t flags_tmp;
2433 struct peer *conf;
2434
2435 conf = group->conf;
2436
2437 /* remote-as */
2438 if (conf->as)
2439 peer->as = conf->as;
2440
2441 /* local-as */
2442 if (!CHECK_FLAG(peer->flags_override, PEER_FLAG_LOCAL_AS))
2443 peer->change_local_as = conf->change_local_as;
2444
2445 /* If peer-group has configured TTL then override it */
2446 if (conf->ttl != BGP_DEFAULT_TTL)
2447 peer->ttl = conf->ttl;
2448
2449 /* GTSM hops */
2450 peer->gtsm_hops = conf->gtsm_hops;
2451
2452 /* peer flags apply */
2453 flags_tmp = conf->flags & ~peer->flags_override;
2454 flags_tmp ^= conf->flags_invert ^ peer->flags_invert;
2455 flags_tmp &= ~peer->flags_override;
2456
2457 UNSET_FLAG(peer->flags, ~peer->flags_override);
2458 SET_FLAG(peer->flags, flags_tmp);
2459 SET_FLAG(peer->flags_invert, conf->flags_invert);
2460
2461 /* peer timers apply */
2462 if (!CHECK_FLAG(peer->flags_override, PEER_FLAG_TIMER)) {
2463 PEER_ATTR_INHERIT(peer, group, holdtime);
2464 PEER_ATTR_INHERIT(peer, group, keepalive);
2465 }
2466
2467 if (!CHECK_FLAG(peer->flags_override, PEER_FLAG_TIMER_CONNECT)) {
2468 PEER_ATTR_INHERIT(peer, group, connect);
2469 if (CHECK_FLAG(conf->flags, PEER_FLAG_TIMER_CONNECT))
2470 peer->v_connect = conf->connect;
2471 else
2472 peer->v_connect = peer->bgp->default_connect_retry;
2473 }
2474
2475 /* advertisement-interval apply */
2476 if (!CHECK_FLAG(peer->flags_override, PEER_FLAG_ROUTEADV)) {
2477 PEER_ATTR_INHERIT(peer, group, routeadv);
2478 if (CHECK_FLAG(conf->flags, PEER_FLAG_ROUTEADV))
2479 peer->v_routeadv = conf->routeadv;
2480 else
2481 peer->v_routeadv = (peer_sort(peer) == BGP_PEER_IBGP)
2482 ? BGP_DEFAULT_IBGP_ROUTEADV
2483 : BGP_DEFAULT_EBGP_ROUTEADV;
2484 }
2485
2486 /* capability extended-nexthop apply */
2487 if (!CHECK_FLAG(peer->flags_override, PEER_FLAG_CAPABILITY_ENHE))
2488 if (CHECK_FLAG(conf->flags, PEER_FLAG_CAPABILITY_ENHE))
2489 SET_FLAG(peer->flags, PEER_FLAG_CAPABILITY_ENHE);
2490
2491 /* password apply */
2492 if (!CHECK_FLAG(peer->flags_override, PEER_FLAG_PASSWORD))
2493 PEER_STR_ATTR_INHERIT(peer, group, password,
2494 MTYPE_PEER_PASSWORD);
2495
2496 if (!BGP_PEER_SU_UNSPEC(peer))
2497 bgp_md5_set(peer);
2498
2499 /* update-source apply */
2500 if (!CHECK_FLAG(peer->flags_override, PEER_FLAG_UPDATE_SOURCE)) {
2501 if (conf->update_source) {
2502 XFREE(MTYPE_PEER_UPDATE_SOURCE, peer->update_if);
2503 PEER_SU_ATTR_INHERIT(peer, group, update_source);
2504 } else if (conf->update_if) {
2505 sockunion_free(peer->update_source);
2506 PEER_STR_ATTR_INHERIT(peer, group, update_if,
2507 MTYPE_PEER_UPDATE_SOURCE);
2508 }
2509 }
2510
2511 /* Update GR flags for the peer. */
2512 bgp_peer_gr_flags_update(peer);
2513
2514 bgp_bfd_peer_group2peer_copy(conf, peer);
2515 }
2516
2517 /* Peer group's remote AS configuration. */
2518 int peer_group_remote_as(struct bgp *bgp, const char *group_name, as_t *as,
2519 int as_type)
2520 {
2521 struct peer_group *group;
2522 struct peer *peer;
2523 struct listnode *node, *nnode;
2524
2525 group = peer_group_lookup(bgp, group_name);
2526 if (!group)
2527 return -1;
2528
2529 if ((as_type == group->conf->as_type) && (group->conf->as == *as))
2530 return 0;
2531
2532
2533 /* When we setup peer-group AS number all peer group member's AS
2534 number must be updated to same number. */
2535 peer_as_change(group->conf, *as, as_type);
2536
2537 for (ALL_LIST_ELEMENTS(group->peer, node, nnode, peer)) {
2538 if (((peer->as_type == AS_SPECIFIED) && peer->as != *as)
2539 || (peer->as_type != as_type))
2540 peer_as_change(peer, *as, as_type);
2541 }
2542
2543 return 0;
2544 }
2545
2546 void peer_notify_unconfig(struct peer *peer)
2547 {
2548 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status))
2549 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
2550 BGP_NOTIFY_CEASE_PEER_UNCONFIG);
2551 }
2552
2553 void peer_group_notify_unconfig(struct peer_group *group)
2554 {
2555 struct peer *peer, *other;
2556 struct listnode *node, *nnode;
2557
2558 for (ALL_LIST_ELEMENTS(group->peer, node, nnode, peer)) {
2559 other = peer->doppelganger;
2560 if (other && other->status != Deleted) {
2561 other->group = NULL;
2562 peer_notify_unconfig(other);
2563 } else
2564 peer_notify_unconfig(peer);
2565 }
2566 }
2567
2568 int peer_group_delete(struct peer_group *group)
2569 {
2570 struct bgp *bgp;
2571 struct peer *peer;
2572 struct prefix *prefix;
2573 struct peer *other;
2574 struct listnode *node, *nnode;
2575 afi_t afi;
2576
2577 bgp = group->bgp;
2578
2579 for (ALL_LIST_ELEMENTS(group->peer, node, nnode, peer)) {
2580 other = peer->doppelganger;
2581
2582 if (CHECK_FLAG(peer->flags, PEER_FLAG_CAPABILITY_ENHE))
2583 bgp_zebra_terminate_radv(bgp, peer);
2584
2585 peer_delete(peer);
2586 if (other && other->status != Deleted) {
2587 other->group = NULL;
2588 peer_delete(other);
2589 }
2590 }
2591 list_delete(&group->peer);
2592
2593 for (afi = AFI_IP; afi < AFI_MAX; afi++) {
2594 for (ALL_LIST_ELEMENTS(group->listen_range[afi], node, nnode,
2595 prefix)) {
2596 prefix_free(&prefix);
2597 }
2598 list_delete(&group->listen_range[afi]);
2599 }
2600
2601 XFREE(MTYPE_PEER_GROUP_HOST, group->name);
2602 group->name = NULL;
2603
2604 bfd_info_free(&(group->conf->bfd_info));
2605
2606 group->conf->group = NULL;
2607 peer_delete(group->conf);
2608
2609 /* Delete from all peer_group list. */
2610 listnode_delete(bgp->group, group);
2611
2612 peer_group_free(group);
2613
2614 return 0;
2615 }
2616
2617 int peer_group_remote_as_delete(struct peer_group *group)
2618 {
2619 struct peer *peer, *other;
2620 struct listnode *node, *nnode;
2621
2622 if ((group->conf->as_type == AS_UNSPECIFIED)
2623 || ((!group->conf->as) && (group->conf->as_type == AS_SPECIFIED)))
2624 return 0;
2625
2626 for (ALL_LIST_ELEMENTS(group->peer, node, nnode, peer)) {
2627 other = peer->doppelganger;
2628
2629 if (CHECK_FLAG(peer->flags, PEER_FLAG_CAPABILITY_ENHE))
2630 bgp_zebra_terminate_radv(peer->bgp, peer);
2631
2632 peer_delete(peer);
2633
2634 if (other && other->status != Deleted) {
2635 other->group = NULL;
2636 peer_delete(other);
2637 }
2638 }
2639 list_delete_all_node(group->peer);
2640
2641 group->conf->as = 0;
2642 group->conf->as_type = AS_UNSPECIFIED;
2643
2644 return 0;
2645 }
2646
2647 int peer_group_listen_range_add(struct peer_group *group, struct prefix *range)
2648 {
2649 struct prefix *prefix;
2650 struct listnode *node, *nnode;
2651 afi_t afi;
2652
2653 afi = family2afi(range->family);
2654
2655 /* Group needs remote AS configured. */
2656 if (group->conf->as_type == AS_UNSPECIFIED)
2657 return BGP_ERR_PEER_GROUP_NO_REMOTE_AS;
2658
2659 /* Ensure no duplicates. Currently we don't care about overlaps. */
2660 for (ALL_LIST_ELEMENTS(group->listen_range[afi], node, nnode, prefix)) {
2661 if (prefix_same(range, prefix))
2662 return 0;
2663 }
2664
2665 prefix = prefix_new();
2666 prefix_copy(prefix, range);
2667 listnode_add(group->listen_range[afi], prefix);
2668
2669 /* Update passwords for new ranges */
2670 if (group->conf->password)
2671 bgp_md5_set_prefix(prefix, group->conf->password);
2672
2673 return 0;
2674 }
2675
2676 int peer_group_listen_range_del(struct peer_group *group, struct prefix *range)
2677 {
2678 struct prefix *prefix, prefix2;
2679 struct listnode *node, *nnode;
2680 struct peer *peer;
2681 afi_t afi;
2682 char buf[PREFIX2STR_BUFFER];
2683
2684 afi = family2afi(range->family);
2685
2686 /* Identify the listen range. */
2687 for (ALL_LIST_ELEMENTS(group->listen_range[afi], node, nnode, prefix)) {
2688 if (prefix_same(range, prefix))
2689 break;
2690 }
2691
2692 if (!prefix)
2693 return BGP_ERR_DYNAMIC_NEIGHBORS_RANGE_NOT_FOUND;
2694
2695 prefix2str(prefix, buf, sizeof(buf));
2696
2697 /* Dispose off any dynamic neighbors that exist due to this listen range
2698 */
2699 for (ALL_LIST_ELEMENTS(group->peer, node, nnode, peer)) {
2700 if (!peer_dynamic_neighbor(peer))
2701 continue;
2702
2703 sockunion2hostprefix(&peer->su, &prefix2);
2704 if (prefix_match(prefix, &prefix2)) {
2705 if (bgp_debug_neighbor_events(peer))
2706 zlog_debug(
2707 "Deleting dynamic neighbor %s group %s upon delete of listen range %s",
2708 peer->host, group->name, buf);
2709 peer_delete(peer);
2710 }
2711 }
2712
2713 /* Get rid of the listen range */
2714 listnode_delete(group->listen_range[afi], prefix);
2715
2716 /* Remove passwords for deleted ranges */
2717 if (group->conf->password)
2718 bgp_md5_unset_prefix(prefix);
2719
2720 return 0;
2721 }
2722
2723 /* Bind specified peer to peer group. */
2724 int peer_group_bind(struct bgp *bgp, union sockunion *su, struct peer *peer,
2725 struct peer_group *group, as_t *as)
2726 {
2727 int first_member = 0;
2728 afi_t afi;
2729 safi_t safi;
2730 bgp_peer_sort_t ptype, gtype;
2731
2732 /* Lookup the peer. */
2733 if (!peer)
2734 peer = peer_lookup(bgp, su);
2735
2736 /* The peer exist, bind it to the peer-group */
2737 if (peer) {
2738 /* When the peer already belongs to a peer-group, check the
2739 * consistency. */
2740 if (peer_group_active(peer)) {
2741
2742 /* The peer is already bound to the peer-group,
2743 * nothing to do
2744 */
2745 if (strcmp(peer->group->name, group->name) == 0)
2746 return 0;
2747 else
2748 return BGP_ERR_PEER_GROUP_CANT_CHANGE;
2749 }
2750
2751 /* The peer has not specified a remote-as, inherit it from the
2752 * peer-group */
2753 if (peer->as_type == AS_UNSPECIFIED) {
2754 peer->as_type = group->conf->as_type;
2755 peer->as = group->conf->as;
2756 peer->sort = group->conf->sort;
2757 }
2758
2759 ptype = peer_sort(peer);
2760 if (!group->conf->as && ptype != BGP_PEER_UNSPECIFIED) {
2761 gtype = peer_sort(group->conf);
2762 if ((gtype != BGP_PEER_INTERNAL) && (gtype != ptype)) {
2763 if (as)
2764 *as = peer->as;
2765 return BGP_ERR_PEER_GROUP_PEER_TYPE_DIFFERENT;
2766 }
2767
2768 if (gtype == BGP_PEER_INTERNAL)
2769 first_member = 1;
2770 }
2771
2772 peer_group2peer_config_copy(group, peer);
2773
2774 FOREACH_AFI_SAFI (afi, safi) {
2775 if (group->conf->afc[afi][safi]) {
2776 peer->afc[afi][safi] = 1;
2777
2778 if (peer_af_find(peer, afi, safi)
2779 || peer_af_create(peer, afi, safi)) {
2780 peer_group2peer_config_copy_af(
2781 group, peer, afi, safi);
2782 }
2783 } else if (peer->afc[afi][safi])
2784 peer_deactivate(peer, afi, safi);
2785 }
2786
2787 if (peer->group) {
2788 assert(group && peer->group == group);
2789 } else {
2790 listnode_delete(bgp->peer, peer);
2791
2792 peer->group = group;
2793 listnode_add_sort(bgp->peer, peer);
2794
2795 peer = peer_lock(peer); /* group->peer list reference */
2796 listnode_add(group->peer, peer);
2797 }
2798
2799 if (first_member) {
2800 gtype = peer_sort(group->conf);
2801 /* Advertisement-interval reset */
2802 if (!CHECK_FLAG(group->conf->flags,
2803 PEER_FLAG_ROUTEADV)) {
2804 group->conf->v_routeadv =
2805 (gtype == BGP_PEER_IBGP)
2806 ? BGP_DEFAULT_IBGP_ROUTEADV
2807 : BGP_DEFAULT_EBGP_ROUTEADV;
2808 }
2809
2810 /* ebgp-multihop reset */
2811 if (gtype == BGP_PEER_IBGP)
2812 group->conf->ttl = MAXTTL;
2813
2814 /* local-as reset */
2815 if (gtype != BGP_PEER_EBGP) {
2816 group->conf->change_local_as = 0;
2817 peer_flag_unset(group->conf,
2818 PEER_FLAG_LOCAL_AS);
2819 peer_flag_unset(group->conf,
2820 PEER_FLAG_LOCAL_AS_NO_PREPEND);
2821 peer_flag_unset(group->conf,
2822 PEER_FLAG_LOCAL_AS_REPLACE_AS);
2823 }
2824 }
2825
2826 SET_FLAG(peer->flags, PEER_FLAG_CONFIG_NODE);
2827
2828 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status)) {
2829 peer->last_reset = PEER_DOWN_RMAP_BIND;
2830 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
2831 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
2832 } else {
2833 bgp_session_reset(peer);
2834 }
2835 }
2836
2837 /* Create a new peer. */
2838 else {
2839 if ((group->conf->as_type == AS_SPECIFIED)
2840 && (!group->conf->as)) {
2841 return BGP_ERR_PEER_GROUP_NO_REMOTE_AS;
2842 }
2843
2844 peer = peer_create(su, NULL, bgp, bgp->as, group->conf->as,
2845 group->conf->as_type, 0, 0, group);
2846
2847 peer = peer_lock(peer); /* group->peer list reference */
2848 listnode_add(group->peer, peer);
2849
2850 peer_group2peer_config_copy(group, peer);
2851
2852 /* If the peer-group is active for this afi/safi then activate
2853 * for this peer */
2854 FOREACH_AFI_SAFI (afi, safi) {
2855 if (group->conf->afc[afi][safi]) {
2856 peer->afc[afi][safi] = 1;
2857 peer_af_create(peer, afi, safi);
2858 peer_group2peer_config_copy_af(group, peer, afi,
2859 safi);
2860 } else if (peer->afc[afi][safi])
2861 peer_deactivate(peer, afi, safi);
2862 }
2863
2864 SET_FLAG(peer->flags, PEER_FLAG_CONFIG_NODE);
2865
2866 /* Set up peer's events and timers. */
2867 if (peer_active(peer))
2868 bgp_timer_set(peer);
2869 }
2870
2871 return 0;
2872 }
2873
2874 static int bgp_startup_timer_expire(struct thread *thread)
2875 {
2876 struct bgp *bgp;
2877
2878 bgp = THREAD_ARG(thread);
2879 bgp->t_startup = NULL;
2880
2881 return 0;
2882 }
2883
2884 /*
2885 * On shutdown we call the cleanup function which
2886 * does a free of the link list nodes, free up
2887 * the data we are pointing at too.
2888 */
2889 static void bgp_vrf_string_name_delete(void *data)
2890 {
2891 char *vname = data;
2892
2893 XFREE(MTYPE_TMP, vname);
2894 }
2895
2896 /* BGP instance creation by `router bgp' commands. */
2897 static struct bgp *bgp_create(as_t *as, const char *name,
2898 enum bgp_instance_type inst_type)
2899 {
2900 struct bgp *bgp;
2901 afi_t afi;
2902 safi_t safi;
2903
2904 if ((bgp = XCALLOC(MTYPE_BGP, sizeof(struct bgp))) == NULL)
2905 return NULL;
2906
2907 if (BGP_DEBUG(zebra, ZEBRA)) {
2908 if (inst_type == BGP_INSTANCE_TYPE_DEFAULT)
2909 zlog_debug("Creating Default VRF, AS %u", *as);
2910 else
2911 zlog_debug("Creating %s %s, AS %u",
2912 (inst_type == BGP_INSTANCE_TYPE_VRF)
2913 ? "VRF"
2914 : "VIEW",
2915 name, *as);
2916 }
2917
2918 /* Default the EVPN VRF to the default one */
2919 if (inst_type == BGP_INSTANCE_TYPE_DEFAULT && !bgp_master.bgp_evpn) {
2920 bgp_lock(bgp);
2921 bm->bgp_evpn = bgp;
2922 }
2923
2924 bgp_lock(bgp);
2925 bgp->heuristic_coalesce = true;
2926 bgp->inst_type = inst_type;
2927 bgp->vrf_id = (inst_type == BGP_INSTANCE_TYPE_DEFAULT) ? VRF_DEFAULT
2928 : VRF_UNKNOWN;
2929 bgp->peer_self = peer_new(bgp);
2930 XFREE(MTYPE_BGP_PEER_HOST, bgp->peer_self->host);
2931 bgp->peer_self->host =
2932 XSTRDUP(MTYPE_BGP_PEER_HOST, "Static announcement");
2933 XFREE(MTYPE_BGP_PEER_HOST, bgp->peer_self->hostname);
2934 if (cmd_hostname_get())
2935 bgp->peer_self->hostname =
2936 XSTRDUP(MTYPE_BGP_PEER_HOST, cmd_hostname_get());
2937
2938 XFREE(MTYPE_BGP_PEER_HOST, bgp->peer_self->domainname);
2939 if (cmd_domainname_get())
2940 bgp->peer_self->domainname =
2941 XSTRDUP(MTYPE_BGP_PEER_HOST, cmd_domainname_get());
2942 bgp->peer = list_new();
2943 bgp->peer->cmp = (int (*)(void *, void *))peer_cmp;
2944 bgp->peerhash = hash_create(peer_hash_key_make, peer_hash_same,
2945 "BGP Peer Hash");
2946 bgp->peerhash->max_size = BGP_PEER_MAX_HASH_SIZE;
2947
2948 bgp->group = list_new();
2949 bgp->group->cmp = (int (*)(void *, void *))peer_group_cmp;
2950
2951 FOREACH_AFI_SAFI (afi, safi) {
2952 bgp->route[afi][safi] = bgp_table_init(bgp, afi, safi);
2953 bgp->aggregate[afi][safi] = bgp_table_init(bgp, afi, safi);
2954 bgp->rib[afi][safi] = bgp_table_init(bgp, afi, safi);
2955
2956 /* Enable maximum-paths */
2957 bgp_maximum_paths_set(bgp, afi, safi, BGP_PEER_EBGP,
2958 multipath_num, 0);
2959 bgp_maximum_paths_set(bgp, afi, safi, BGP_PEER_IBGP,
2960 multipath_num, 0);
2961 /* Initialize graceful restart info */
2962 bgp->gr_info[afi][safi].eor_required = 0;
2963 bgp->gr_info[afi][safi].eor_received = 0;
2964 bgp->gr_info[afi][safi].t_select_deferral = NULL;
2965 bgp->gr_info[afi][safi].t_route_select = NULL;
2966 bgp->gr_info[afi][safi].route_list = list_new();
2967 }
2968
2969 bgp->v_update_delay = BGP_UPDATE_DELAY_DEF;
2970 bgp->default_local_pref = BGP_DEFAULT_LOCAL_PREF;
2971 bgp->default_subgroup_pkt_queue_max =
2972 BGP_DEFAULT_SUBGROUP_PKT_QUEUE_MAX;
2973 bgp_timers_unset(bgp);
2974 bgp->restart_time = BGP_DEFAULT_RESTART_TIME;
2975 bgp->stalepath_time = BGP_DEFAULT_STALEPATH_TIME;
2976 bgp->select_defer_time = BGP_DEFAULT_SELECT_DEFERRAL_TIME;
2977 bgp->rib_stale_time = BGP_DEFAULT_RIB_STALE_TIME;
2978 bgp->dynamic_neighbors_limit = BGP_DYNAMIC_NEIGHBORS_LIMIT_DEFAULT;
2979 bgp->dynamic_neighbors_count = 0;
2980 bgp->lb_ref_bw = BGP_LINK_BW_REF_BW;
2981 bgp->lb_handling = BGP_LINK_BW_ECMP;
2982 bgp->reject_as_sets = false;
2983 bgp_addpath_init_bgp_data(&bgp->tx_addpath);
2984
2985 bgp->as = *as;
2986
2987 #ifdef ENABLE_BGP_VNC
2988 if (inst_type != BGP_INSTANCE_TYPE_VRF) {
2989 bgp->rfapi = bgp_rfapi_new(bgp);
2990 assert(bgp->rfapi);
2991 assert(bgp->rfapi_cfg);
2992 }
2993 #endif /* ENABLE_BGP_VNC */
2994
2995 for (afi = AFI_IP; afi < AFI_MAX; afi++) {
2996 bgp->vpn_policy[afi].bgp = bgp;
2997 bgp->vpn_policy[afi].afi = afi;
2998 bgp->vpn_policy[afi].tovpn_label = MPLS_LABEL_NONE;
2999 bgp->vpn_policy[afi].tovpn_zebra_vrf_label_last_sent =
3000 MPLS_LABEL_NONE;
3001
3002 bgp->vpn_policy[afi].import_vrf = list_new();
3003 bgp->vpn_policy[afi].import_vrf->del =
3004 bgp_vrf_string_name_delete;
3005 bgp->vpn_policy[afi].export_vrf = list_new();
3006 bgp->vpn_policy[afi].export_vrf->del =
3007 bgp_vrf_string_name_delete;
3008 }
3009 if (name)
3010 bgp->name = XSTRDUP(MTYPE_BGP, name);
3011
3012 thread_add_timer(bm->master, bgp_startup_timer_expire, bgp,
3013 bgp->restart_time, &bgp->t_startup);
3014
3015 /* printable name we can use in debug messages */
3016 if (inst_type == BGP_INSTANCE_TYPE_DEFAULT) {
3017 bgp->name_pretty = XSTRDUP(MTYPE_BGP, "VRF default");
3018 } else {
3019 const char *n;
3020 int len;
3021
3022 if (bgp->name)
3023 n = bgp->name;
3024 else
3025 n = "?";
3026
3027 len = 4 + 1 + strlen(n) + 1; /* "view foo\0" */
3028
3029 bgp->name_pretty = XCALLOC(MTYPE_BGP, len);
3030 snprintf(bgp->name_pretty, len, "%s %s",
3031 (bgp->inst_type == BGP_INSTANCE_TYPE_VRF)
3032 ? "VRF"
3033 : "VIEW",
3034 n);
3035 }
3036
3037 atomic_store_explicit(&bgp->wpkt_quanta, BGP_WRITE_PACKET_MAX,
3038 memory_order_relaxed);
3039 atomic_store_explicit(&bgp->rpkt_quanta, BGP_READ_PACKET_MAX,
3040 memory_order_relaxed);
3041 bgp->coalesce_time = BGP_DEFAULT_SUBGROUP_COALESCE_TIME;
3042
3043 QOBJ_REG(bgp, bgp);
3044
3045 update_bgp_group_init(bgp);
3046
3047 /* assign a unique rd id for auto derivation of vrf's RD */
3048 bf_assign_index(bm->rd_idspace, bgp->vrf_rd_id);
3049
3050 bgp->evpn_info = XCALLOC(MTYPE_BGP_EVPN_INFO,
3051 sizeof(struct bgp_evpn_info));
3052
3053 bgp_evpn_init(bgp);
3054 bgp_pbr_init(bgp);
3055
3056 /*initilize global GR FSM */
3057 bgp_global_gr_init(bgp);
3058 return bgp;
3059 }
3060
3061 /* Return the "default VRF" instance of BGP. */
3062 struct bgp *bgp_get_default(void)
3063 {
3064 struct bgp *bgp;
3065 struct listnode *node, *nnode;
3066
3067 for (ALL_LIST_ELEMENTS(bm->bgp, node, nnode, bgp))
3068 if (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT)
3069 return bgp;
3070 return NULL;
3071 }
3072
3073 /* Lookup BGP entry. */
3074 struct bgp *bgp_lookup(as_t as, const char *name)
3075 {
3076 struct bgp *bgp;
3077 struct listnode *node, *nnode;
3078
3079 for (ALL_LIST_ELEMENTS(bm->bgp, node, nnode, bgp))
3080 if (bgp->as == as
3081 && ((bgp->name == NULL && name == NULL)
3082 || (bgp->name && name && strcmp(bgp->name, name) == 0)))
3083 return bgp;
3084 return NULL;
3085 }
3086
3087 /* Lookup BGP structure by view name. */
3088 struct bgp *bgp_lookup_by_name(const char *name)
3089 {
3090 struct bgp *bgp;
3091 struct listnode *node, *nnode;
3092
3093 for (ALL_LIST_ELEMENTS(bm->bgp, node, nnode, bgp))
3094 if ((bgp->name == NULL && name == NULL)
3095 || (bgp->name && name && strcmp(bgp->name, name) == 0))
3096 return bgp;
3097 return NULL;
3098 }
3099
3100 /* Lookup BGP instance based on VRF id. */
3101 /* Note: Only to be used for incoming messages from Zebra. */
3102 struct bgp *bgp_lookup_by_vrf_id(vrf_id_t vrf_id)
3103 {
3104 struct vrf *vrf;
3105
3106 /* Lookup VRF (in tree) and follow link. */
3107 vrf = vrf_lookup_by_id(vrf_id);
3108 if (!vrf)
3109 return NULL;
3110 return (vrf->info) ? (struct bgp *)vrf->info : NULL;
3111 }
3112
3113 /* Sets the BGP instance where EVPN is enabled */
3114 void bgp_set_evpn(struct bgp *bgp)
3115 {
3116 if (bm->bgp_evpn == bgp)
3117 return;
3118
3119 /* First, release the reference count we hold on the instance */
3120 if (bm->bgp_evpn)
3121 bgp_unlock(bm->bgp_evpn);
3122
3123 bm->bgp_evpn = bgp;
3124
3125 /* Increase the reference count on this new VRF */
3126 if (bm->bgp_evpn)
3127 bgp_lock(bm->bgp_evpn);
3128 }
3129
3130 /* Returns the BGP instance where EVPN is enabled, if any */
3131 struct bgp *bgp_get_evpn(void)
3132 {
3133 return bm->bgp_evpn;
3134 }
3135
3136 /* handle socket creation or deletion, if necessary
3137 * this is called for all new BGP instances
3138 */
3139 int bgp_handle_socket(struct bgp *bgp, struct vrf *vrf, vrf_id_t old_vrf_id,
3140 bool create)
3141 {
3142 int ret = 0;
3143
3144 /* Create BGP server socket, if listen mode not disabled */
3145 if (!bgp || bgp_option_check(BGP_OPT_NO_LISTEN))
3146 return 0;
3147 if (bgp->inst_type == BGP_INSTANCE_TYPE_VRF) {
3148 /*
3149 * suppress vrf socket
3150 */
3151 if (!create) {
3152 bgp_close_vrf_socket(bgp);
3153 return 0;
3154 }
3155 if (vrf == NULL)
3156 return BGP_ERR_INVALID_VALUE;
3157 /* do nothing
3158 * if vrf_id did not change
3159 */
3160 if (vrf->vrf_id == old_vrf_id)
3161 return 0;
3162 if (old_vrf_id != VRF_UNKNOWN) {
3163 /* look for old socket. close it. */
3164 bgp_close_vrf_socket(bgp);
3165 }
3166 /* if backend is not yet identified ( VRF_UNKNOWN) then
3167 * creation will be done later
3168 */
3169 if (vrf->vrf_id == VRF_UNKNOWN)
3170 return 0;
3171 ret = bgp_socket(bgp, bm->port, bm->address);
3172 if (ret < 0)
3173 return BGP_ERR_INVALID_VALUE;
3174 return 0;
3175 } else
3176 return bgp_check_main_socket(create, bgp);
3177 }
3178
3179 /* Called from VTY commands. */
3180 int bgp_get(struct bgp **bgp_val, as_t *as, const char *name,
3181 enum bgp_instance_type inst_type)
3182 {
3183 struct bgp *bgp;
3184 struct vrf *vrf = NULL;
3185
3186 /* Multiple instance check. */
3187 if (name)
3188 bgp = bgp_lookup_by_name(name);
3189 else
3190 bgp = bgp_get_default();
3191
3192 /* Already exists. */
3193 if (bgp) {
3194 if (bgp->as != *as) {
3195 *as = bgp->as;
3196 return BGP_ERR_INSTANCE_MISMATCH;
3197 }
3198 if (bgp->inst_type != inst_type)
3199 return BGP_ERR_INSTANCE_MISMATCH;
3200 *bgp_val = bgp;
3201 return BGP_SUCCESS;
3202 }
3203
3204 bgp = bgp_create(as, name, inst_type);
3205 if (bgp_option_check(BGP_OPT_NO_ZEBRA) && name)
3206 bgp->vrf_id = vrf_generate_id();
3207 bgp_router_id_set(bgp, &bgp->router_id_zebra, true);
3208 bgp_address_init(bgp);
3209 bgp_tip_hash_init(bgp);
3210 bgp_scan_init(bgp);
3211 *bgp_val = bgp;
3212
3213 bgp->t_rmap_def_originate_eval = NULL;
3214
3215 /* If Default instance or VRF, link to the VRF structure, if present. */
3216 if (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT
3217 || bgp->inst_type == BGP_INSTANCE_TYPE_VRF) {
3218 vrf = bgp_vrf_lookup_by_instance_type(bgp);
3219 if (vrf)
3220 bgp_vrf_link(bgp, vrf);
3221 }
3222 /* BGP server socket already processed if BGP instance
3223 * already part of the list
3224 */
3225 bgp_handle_socket(bgp, vrf, VRF_UNKNOWN, true);
3226 listnode_add(bm->bgp, bgp);
3227
3228 if (IS_BGP_INST_KNOWN_TO_ZEBRA(bgp)) {
3229 if (BGP_DEBUG(zebra, ZEBRA))
3230 zlog_debug("%s: Registering BGP instance %s to zebra",
3231 __func__, name);
3232 bgp_zebra_instance_register(bgp);
3233 }
3234
3235 return BGP_CREATED;
3236 }
3237
3238 /*
3239 * Make BGP instance "up". Applies only to VRFs (non-default) and
3240 * implies the VRF has been learnt from Zebra.
3241 */
3242 void bgp_instance_up(struct bgp *bgp)
3243 {
3244 struct peer *peer;
3245 struct listnode *node, *next;
3246
3247 /* Register with zebra. */
3248 bgp_zebra_instance_register(bgp);
3249
3250 /* Kick off any peers that may have been configured. */
3251 for (ALL_LIST_ELEMENTS(bgp->peer, node, next, peer)) {
3252 if (!BGP_PEER_START_SUPPRESSED(peer))
3253 BGP_EVENT_ADD(peer, BGP_Start);
3254 }
3255
3256 /* Process any networks that have been configured. */
3257 bgp_static_add(bgp);
3258 }
3259
3260 /*
3261 * Make BGP instance "down". Applies only to VRFs (non-default) and
3262 * implies the VRF has been deleted by Zebra.
3263 */
3264 void bgp_instance_down(struct bgp *bgp)
3265 {
3266 struct peer *peer;
3267 struct listnode *node;
3268 struct listnode *next;
3269
3270 /* Stop timers. */
3271 if (bgp->t_rmap_def_originate_eval) {
3272 BGP_TIMER_OFF(bgp->t_rmap_def_originate_eval);
3273 bgp_unlock(bgp); /* TODO - This timer is started with a lock -
3274 why? */
3275 }
3276
3277 /* Bring down peers, so corresponding routes are purged. */
3278 for (ALL_LIST_ELEMENTS(bgp->peer, node, next, peer)) {
3279 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status))
3280 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
3281 BGP_NOTIFY_CEASE_ADMIN_SHUTDOWN);
3282 else
3283 bgp_session_reset(peer);
3284 }
3285
3286 /* Purge network and redistributed routes. */
3287 bgp_purge_static_redist_routes(bgp);
3288
3289 /* Cleanup registered nexthops (flags) */
3290 bgp_cleanup_nexthops(bgp);
3291 }
3292
3293 /* Delete BGP instance. */
3294 int bgp_delete(struct bgp *bgp)
3295 {
3296 struct peer *peer;
3297 struct peer_group *group;
3298 struct listnode *node, *next;
3299 struct vrf *vrf;
3300 afi_t afi;
3301 safi_t safi;
3302 int i;
3303 struct graceful_restart_info *gr_info;
3304
3305 assert(bgp);
3306
3307 hook_call(bgp_inst_delete, bgp);
3308
3309 THREAD_OFF(bgp->t_startup);
3310 THREAD_OFF(bgp->t_maxmed_onstartup);
3311 THREAD_OFF(bgp->t_update_delay);
3312 THREAD_OFF(bgp->t_establish_wait);
3313
3314 /* Set flag indicating bgp instance delete in progress */
3315 SET_FLAG(bgp->flags, BGP_FLAG_DELETE_IN_PROGRESS);
3316
3317 /* Delete the graceful restart info */
3318 FOREACH_AFI_SAFI (afi, safi) {
3319 gr_info = &bgp->gr_info[afi][safi];
3320 if (!gr_info)
3321 continue;
3322
3323 BGP_TIMER_OFF(gr_info->t_select_deferral);
3324 BGP_TIMER_OFF(gr_info->t_route_select);
3325 if (gr_info->route_list)
3326 list_delete(&gr_info->route_list);
3327 }
3328
3329 if (BGP_DEBUG(zebra, ZEBRA)) {
3330 if (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT)
3331 zlog_debug("Deleting Default VRF");
3332 else
3333 zlog_debug("Deleting %s %s",
3334 (bgp->inst_type == BGP_INSTANCE_TYPE_VRF)
3335 ? "VRF"
3336 : "VIEW",
3337 bgp->name);
3338 }
3339
3340 /* unmap from RT list */
3341 bgp_evpn_vrf_delete(bgp);
3342
3343 /* unmap bgp vrf label */
3344 vpn_leak_zebra_vrf_label_withdraw(bgp, AFI_IP);
3345 vpn_leak_zebra_vrf_label_withdraw(bgp, AFI_IP6);
3346
3347 /* Stop timers. */
3348 if (bgp->t_rmap_def_originate_eval) {
3349 BGP_TIMER_OFF(bgp->t_rmap_def_originate_eval);
3350 bgp_unlock(bgp); /* TODO - This timer is started with a lock -
3351 why? */
3352 }
3353
3354 /* Inform peers we're going down. */
3355 for (ALL_LIST_ELEMENTS(bgp->peer, node, next, peer)) {
3356 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status))
3357 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
3358 BGP_NOTIFY_CEASE_ADMIN_SHUTDOWN);
3359 }
3360
3361 /* Delete static routes (networks). */
3362 bgp_static_delete(bgp);
3363
3364 /* Unset redistribution. */
3365 for (afi = AFI_IP; afi < AFI_MAX; afi++)
3366 for (i = 0; i < ZEBRA_ROUTE_MAX; i++)
3367 if (i != ZEBRA_ROUTE_BGP)
3368 bgp_redistribute_unset(bgp, afi, i, 0);
3369
3370 /* Free peers and peer-groups. */
3371 for (ALL_LIST_ELEMENTS(bgp->group, node, next, group))
3372 peer_group_delete(group);
3373
3374 for (ALL_LIST_ELEMENTS(bgp->peer, node, next, peer))
3375 peer_delete(peer);
3376
3377 if (bgp->peer_self) {
3378 peer_delete(bgp->peer_self);
3379 bgp->peer_self = NULL;
3380 }
3381
3382 update_bgp_group_free(bgp);
3383
3384 /* TODO - Other memory may need to be freed - e.g., NHT */
3385
3386 #ifdef ENABLE_BGP_VNC
3387 rfapi_delete(bgp);
3388 #endif
3389 bgp_cleanup_routes(bgp);
3390
3391 for (afi = 0; afi < AFI_MAX; ++afi) {
3392 if (!bgp->vpn_policy[afi].import_redirect_rtlist)
3393 continue;
3394 ecommunity_free(
3395 &bgp->vpn_policy[afi]
3396 .import_redirect_rtlist);
3397 bgp->vpn_policy[afi].import_redirect_rtlist = NULL;
3398 }
3399
3400 /* Deregister from Zebra, if needed */
3401 if (IS_BGP_INST_KNOWN_TO_ZEBRA(bgp)) {
3402 if (BGP_DEBUG(zebra, ZEBRA))
3403 zlog_debug(
3404 "%s: deregistering this bgp %s instance from zebra",
3405 __func__, bgp->name);
3406 bgp_zebra_instance_deregister(bgp);
3407 }
3408
3409 /* Remove visibility via the master list - there may however still be
3410 * routes to be processed still referencing the struct bgp.
3411 */
3412 listnode_delete(bm->bgp, bgp);
3413
3414 /* Free interfaces in this instance. */
3415 bgp_if_finish(bgp);
3416
3417 vrf = bgp_vrf_lookup_by_instance_type(bgp);
3418 bgp_handle_socket(bgp, vrf, VRF_UNKNOWN, false);
3419 if (vrf)
3420 bgp_vrf_unlink(bgp, vrf);
3421
3422 /* Update EVPN VRF pointer */
3423 if (bm->bgp_evpn == bgp) {
3424 if (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT)
3425 bgp_set_evpn(NULL);
3426 else
3427 bgp_set_evpn(bgp_get_default());
3428 }
3429
3430 thread_master_free_unused(bm->master);
3431 bgp_unlock(bgp); /* initial reference */
3432
3433 return 0;
3434 }
3435
3436 void bgp_free(struct bgp *bgp)
3437 {
3438 afi_t afi;
3439 safi_t safi;
3440 struct bgp_table *table;
3441 struct bgp_dest *dest;
3442 struct bgp_rmap *rmap;
3443
3444 QOBJ_UNREG(bgp);
3445
3446 list_delete(&bgp->group);
3447 list_delete(&bgp->peer);
3448
3449 if (bgp->peerhash) {
3450 hash_free(bgp->peerhash);
3451 bgp->peerhash = NULL;
3452 }
3453
3454 FOREACH_AFI_SAFI (afi, safi) {
3455 /* Special handling for 2-level routing tables. */
3456 if (safi == SAFI_MPLS_VPN || safi == SAFI_ENCAP
3457 || safi == SAFI_EVPN) {
3458 for (dest = bgp_table_top(bgp->rib[afi][safi]); dest;
3459 dest = bgp_route_next(dest)) {
3460 table = bgp_dest_get_bgp_table_info(dest);
3461 bgp_table_finish(&table);
3462 }
3463 }
3464 if (bgp->route[afi][safi])
3465 bgp_table_finish(&bgp->route[afi][safi]);
3466 if (bgp->aggregate[afi][safi])
3467 bgp_table_finish(&bgp->aggregate[afi][safi]);
3468 if (bgp->rib[afi][safi])
3469 bgp_table_finish(&bgp->rib[afi][safi]);
3470 rmap = &bgp->table_map[afi][safi];
3471 XFREE(MTYPE_ROUTE_MAP_NAME, rmap->name);
3472 }
3473
3474 bgp_scan_finish(bgp);
3475 bgp_address_destroy(bgp);
3476 bgp_tip_hash_destroy(bgp);
3477
3478 /* release the auto RD id */
3479 bf_release_index(bm->rd_idspace, bgp->vrf_rd_id);
3480
3481 bgp_evpn_cleanup(bgp);
3482 bgp_pbr_cleanup(bgp);
3483 XFREE(MTYPE_BGP_EVPN_INFO, bgp->evpn_info);
3484
3485 for (afi = AFI_IP; afi < AFI_MAX; afi++) {
3486 vpn_policy_direction_t dir;
3487
3488 if (bgp->vpn_policy[afi].import_vrf)
3489 list_delete(&bgp->vpn_policy[afi].import_vrf);
3490 if (bgp->vpn_policy[afi].export_vrf)
3491 list_delete(&bgp->vpn_policy[afi].export_vrf);
3492
3493 dir = BGP_VPN_POLICY_DIR_FROMVPN;
3494 if (bgp->vpn_policy[afi].rtlist[dir])
3495 ecommunity_free(&bgp->vpn_policy[afi].rtlist[dir]);
3496 dir = BGP_VPN_POLICY_DIR_TOVPN;
3497 if (bgp->vpn_policy[afi].rtlist[dir])
3498 ecommunity_free(&bgp->vpn_policy[afi].rtlist[dir]);
3499 }
3500
3501 XFREE(MTYPE_BGP, bgp->name);
3502 XFREE(MTYPE_BGP, bgp->name_pretty);
3503
3504 XFREE(MTYPE_BGP, bgp);
3505 }
3506
3507 struct peer *peer_lookup_by_conf_if(struct bgp *bgp, const char *conf_if)
3508 {
3509 struct peer *peer;
3510 struct listnode *node, *nnode;
3511
3512 if (!conf_if)
3513 return NULL;
3514
3515 if (bgp != NULL) {
3516 for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer))
3517 if (peer->conf_if && !strcmp(peer->conf_if, conf_if)
3518 && !CHECK_FLAG(peer->sflags,
3519 PEER_STATUS_ACCEPT_PEER))
3520 return peer;
3521 } else if (bm->bgp != NULL) {
3522 struct listnode *bgpnode, *nbgpnode;
3523
3524 for (ALL_LIST_ELEMENTS(bm->bgp, bgpnode, nbgpnode, bgp))
3525 for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer))
3526 if (peer->conf_if
3527 && !strcmp(peer->conf_if, conf_if)
3528 && !CHECK_FLAG(peer->sflags,
3529 PEER_STATUS_ACCEPT_PEER))
3530 return peer;
3531 }
3532 return NULL;
3533 }
3534
3535 struct peer *peer_lookup_by_hostname(struct bgp *bgp, const char *hostname)
3536 {
3537 struct peer *peer;
3538 struct listnode *node, *nnode;
3539
3540 if (!hostname)
3541 return NULL;
3542
3543 if (bgp != NULL) {
3544 for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer))
3545 if (peer->hostname && !strcmp(peer->hostname, hostname)
3546 && !CHECK_FLAG(peer->sflags,
3547 PEER_STATUS_ACCEPT_PEER))
3548 return peer;
3549 } else if (bm->bgp != NULL) {
3550 struct listnode *bgpnode, *nbgpnode;
3551
3552 for (ALL_LIST_ELEMENTS(bm->bgp, bgpnode, nbgpnode, bgp))
3553 for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer))
3554 if (peer->hostname
3555 && !strcmp(peer->hostname, hostname)
3556 && !CHECK_FLAG(peer->sflags,
3557 PEER_STATUS_ACCEPT_PEER))
3558 return peer;
3559 }
3560 return NULL;
3561 }
3562
3563 struct peer *peer_lookup(struct bgp *bgp, union sockunion *su)
3564 {
3565 struct peer *peer = NULL;
3566 struct peer tmp_peer;
3567
3568 memset(&tmp_peer, 0, sizeof(struct peer));
3569
3570 /*
3571 * We do not want to find the doppelganger peer so search for the peer
3572 * in
3573 * the hash that has PEER_FLAG_CONFIG_NODE
3574 */
3575 SET_FLAG(tmp_peer.flags, PEER_FLAG_CONFIG_NODE);
3576
3577 tmp_peer.su = *su;
3578
3579 if (bgp != NULL) {
3580 peer = hash_lookup(bgp->peerhash, &tmp_peer);
3581 } else if (bm->bgp != NULL) {
3582 struct listnode *bgpnode, *nbgpnode;
3583
3584 for (ALL_LIST_ELEMENTS(bm->bgp, bgpnode, nbgpnode, bgp)) {
3585 peer = hash_lookup(bgp->peerhash, &tmp_peer);
3586 if (peer)
3587 break;
3588 }
3589 }
3590
3591 return peer;
3592 }
3593
3594 struct peer *peer_create_bind_dynamic_neighbor(struct bgp *bgp,
3595 union sockunion *su,
3596 struct peer_group *group)
3597 {
3598 struct peer *peer;
3599 afi_t afi;
3600 safi_t safi;
3601
3602 /* Create peer first; we've already checked group config is valid. */
3603 peer = peer_create(su, NULL, bgp, bgp->as, group->conf->as,
3604 group->conf->as_type, 0, 0, group);
3605 if (!peer)
3606 return NULL;
3607
3608 /* Link to group */
3609 peer = peer_lock(peer);
3610 listnode_add(group->peer, peer);
3611
3612 peer_group2peer_config_copy(group, peer);
3613
3614 /*
3615 * Bind peer for all AFs configured for the group. We don't call
3616 * peer_group_bind as that is sub-optimal and does some stuff we don't
3617 * want.
3618 */
3619 FOREACH_AFI_SAFI (afi, safi) {
3620 if (!group->conf->afc[afi][safi])
3621 continue;
3622 peer->afc[afi][safi] = 1;
3623
3624 if (!peer_af_find(peer, afi, safi))
3625 peer_af_create(peer, afi, safi);
3626
3627 peer_group2peer_config_copy_af(group, peer, afi, safi);
3628 }
3629
3630 /* Mark as dynamic, but also as a "config node" for other things to
3631 * work. */
3632 SET_FLAG(peer->flags, PEER_FLAG_DYNAMIC_NEIGHBOR);
3633 SET_FLAG(peer->flags, PEER_FLAG_CONFIG_NODE);
3634
3635 return peer;
3636 }
3637
3638 struct prefix *
3639 peer_group_lookup_dynamic_neighbor_range(struct peer_group *group,
3640 struct prefix *prefix)
3641 {
3642 struct listnode *node, *nnode;
3643 struct prefix *range;
3644 afi_t afi;
3645
3646 afi = family2afi(prefix->family);
3647
3648 if (group->listen_range[afi])
3649 for (ALL_LIST_ELEMENTS(group->listen_range[afi], node, nnode,
3650 range))
3651 if (prefix_match(range, prefix))
3652 return range;
3653
3654 return NULL;
3655 }
3656
3657 struct peer_group *
3658 peer_group_lookup_dynamic_neighbor(struct bgp *bgp, struct prefix *prefix,
3659 struct prefix **listen_range)
3660 {
3661 struct prefix *range = NULL;
3662 struct peer_group *group = NULL;
3663 struct listnode *node, *nnode;
3664
3665 *listen_range = NULL;
3666 if (bgp != NULL) {
3667 for (ALL_LIST_ELEMENTS(bgp->group, node, nnode, group))
3668 if ((range = peer_group_lookup_dynamic_neighbor_range(
3669 group, prefix)))
3670 break;
3671 } else if (bm->bgp != NULL) {
3672 struct listnode *bgpnode, *nbgpnode;
3673
3674 for (ALL_LIST_ELEMENTS(bm->bgp, bgpnode, nbgpnode, bgp))
3675 for (ALL_LIST_ELEMENTS(bgp->group, node, nnode, group))
3676 if ((range = peer_group_lookup_dynamic_neighbor_range(
3677 group, prefix)))
3678 goto found_range;
3679 }
3680
3681 found_range:
3682 *listen_range = range;
3683 return (group && range) ? group : NULL;
3684 }
3685
3686 struct peer *peer_lookup_dynamic_neighbor(struct bgp *bgp, union sockunion *su)
3687 {
3688 struct peer_group *group;
3689 struct bgp *gbgp;
3690 struct peer *peer;
3691 struct prefix prefix;
3692 struct prefix *listen_range;
3693 int dncount;
3694 char buf[PREFIX2STR_BUFFER];
3695 char buf1[PREFIX2STR_BUFFER];
3696
3697 sockunion2hostprefix(su, &prefix);
3698
3699 /* See if incoming connection matches a configured listen range. */
3700 group = peer_group_lookup_dynamic_neighbor(bgp, &prefix, &listen_range);
3701
3702 if (!group)
3703 return NULL;
3704
3705
3706 gbgp = group->bgp;
3707
3708 if (!gbgp)
3709 return NULL;
3710
3711 prefix2str(&prefix, buf, sizeof(buf));
3712 prefix2str(listen_range, buf1, sizeof(buf1));
3713
3714 if (bgp_debug_neighbor_events(NULL))
3715 zlog_debug(
3716 "Dynamic Neighbor %s matches group %s listen range %s",
3717 buf, group->name, buf1);
3718
3719 /* Are we within the listen limit? */
3720 dncount = gbgp->dynamic_neighbors_count;
3721
3722 if (dncount >= gbgp->dynamic_neighbors_limit) {
3723 if (bgp_debug_neighbor_events(NULL))
3724 zlog_debug("Dynamic Neighbor %s rejected - at limit %d",
3725 inet_sutop(su, buf),
3726 gbgp->dynamic_neighbors_limit);
3727 return NULL;
3728 }
3729
3730 /* Ensure group is not disabled. */
3731 if (CHECK_FLAG(group->conf->flags, PEER_FLAG_SHUTDOWN)) {
3732 if (bgp_debug_neighbor_events(NULL))
3733 zlog_debug(
3734 "Dynamic Neighbor %s rejected - group %s disabled",
3735 buf, group->name);
3736 return NULL;
3737 }
3738
3739 /* Check that at least one AF is activated for the group. */
3740 if (!peer_group_af_configured(group)) {
3741 if (bgp_debug_neighbor_events(NULL))
3742 zlog_debug(
3743 "Dynamic Neighbor %s rejected - no AF activated for group %s",
3744 buf, group->name);
3745 return NULL;
3746 }
3747
3748 /* Create dynamic peer and bind to associated group. */
3749 peer = peer_create_bind_dynamic_neighbor(gbgp, su, group);
3750 assert(peer);
3751
3752 gbgp->dynamic_neighbors_count = ++dncount;
3753
3754 if (bgp_debug_neighbor_events(peer))
3755 zlog_debug("%s Dynamic Neighbor added, group %s count %d",
3756 peer->host, group->name, dncount);
3757
3758 return peer;
3759 }
3760
3761 static void peer_drop_dynamic_neighbor(struct peer *peer)
3762 {
3763 int dncount = -1;
3764 if (peer->group->bgp) {
3765 dncount = peer->group->bgp->dynamic_neighbors_count;
3766 if (dncount)
3767 peer->group->bgp->dynamic_neighbors_count = --dncount;
3768 }
3769 if (bgp_debug_neighbor_events(peer))
3770 zlog_debug("%s dropped from group %s, count %d", peer->host,
3771 peer->group->name, dncount);
3772 }
3773
3774 /* If peer is configured at least one address family return 1. */
3775 bool peer_active(struct peer *peer)
3776 {
3777 if (BGP_PEER_SU_UNSPEC(peer))
3778 return false;
3779 if (peer->afc[AFI_IP][SAFI_UNICAST] || peer->afc[AFI_IP][SAFI_MULTICAST]
3780 || peer->afc[AFI_IP][SAFI_LABELED_UNICAST]
3781 || peer->afc[AFI_IP][SAFI_MPLS_VPN] || peer->afc[AFI_IP][SAFI_ENCAP]
3782 || peer->afc[AFI_IP][SAFI_FLOWSPEC]
3783 || peer->afc[AFI_IP6][SAFI_UNICAST]
3784 || peer->afc[AFI_IP6][SAFI_MULTICAST]
3785 || peer->afc[AFI_IP6][SAFI_LABELED_UNICAST]
3786 || peer->afc[AFI_IP6][SAFI_MPLS_VPN]
3787 || peer->afc[AFI_IP6][SAFI_ENCAP]
3788 || peer->afc[AFI_IP6][SAFI_FLOWSPEC]
3789 || peer->afc[AFI_L2VPN][SAFI_EVPN])
3790 return true;
3791 return false;
3792 }
3793
3794 /* If peer is negotiated at least one address family return 1. */
3795 bool peer_active_nego(struct peer *peer)
3796 {
3797 if (peer->afc_nego[AFI_IP][SAFI_UNICAST]
3798 || peer->afc_nego[AFI_IP][SAFI_MULTICAST]
3799 || peer->afc_nego[AFI_IP][SAFI_LABELED_UNICAST]
3800 || peer->afc_nego[AFI_IP][SAFI_MPLS_VPN]
3801 || peer->afc_nego[AFI_IP][SAFI_ENCAP]
3802 || peer->afc_nego[AFI_IP][SAFI_FLOWSPEC]
3803 || peer->afc_nego[AFI_IP6][SAFI_UNICAST]
3804 || peer->afc_nego[AFI_IP6][SAFI_MULTICAST]
3805 || peer->afc_nego[AFI_IP6][SAFI_LABELED_UNICAST]
3806 || peer->afc_nego[AFI_IP6][SAFI_MPLS_VPN]
3807 || peer->afc_nego[AFI_IP6][SAFI_ENCAP]
3808 || peer->afc_nego[AFI_IP6][SAFI_FLOWSPEC]
3809 || peer->afc_nego[AFI_L2VPN][SAFI_EVPN])
3810 return true;
3811 return false;
3812 }
3813
3814 void peer_change_action(struct peer *peer, afi_t afi, safi_t safi,
3815 enum peer_change_type type)
3816 {
3817 if (CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP))
3818 return;
3819
3820 if (peer->status != Established)
3821 return;
3822
3823 if (type == peer_change_reset) {
3824 /* If we're resetting session, we've to delete both peer struct
3825 */
3826 if ((peer->doppelganger)
3827 && (peer->doppelganger->status != Deleted)
3828 && (!CHECK_FLAG(peer->doppelganger->flags,
3829 PEER_FLAG_CONFIG_NODE)))
3830 peer_delete(peer->doppelganger);
3831
3832 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
3833 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
3834 } else if (type == peer_change_reset_in) {
3835 if (CHECK_FLAG(peer->cap, PEER_CAP_REFRESH_OLD_RCV)
3836 || CHECK_FLAG(peer->cap, PEER_CAP_REFRESH_NEW_RCV))
3837 bgp_route_refresh_send(peer, afi, safi, 0, 0, 0);
3838 else {
3839 if ((peer->doppelganger)
3840 && (peer->doppelganger->status != Deleted)
3841 && (!CHECK_FLAG(peer->doppelganger->flags,
3842 PEER_FLAG_CONFIG_NODE)))
3843 peer_delete(peer->doppelganger);
3844
3845 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
3846 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
3847 }
3848 } else if (type == peer_change_reset_out) {
3849 update_group_adjust_peer(peer_af_find(peer, afi, safi));
3850 bgp_announce_route(peer, afi, safi);
3851 }
3852 }
3853
3854 struct peer_flag_action {
3855 /* Peer's flag. */
3856 uint32_t flag;
3857
3858 /* This flag can be set for peer-group member. */
3859 uint8_t not_for_member;
3860
3861 /* Action when the flag is changed. */
3862 enum peer_change_type type;
3863 };
3864
3865 static const struct peer_flag_action peer_flag_action_list[] = {
3866 {PEER_FLAG_PASSIVE, 0, peer_change_reset},
3867 {PEER_FLAG_SHUTDOWN, 0, peer_change_reset},
3868 {PEER_FLAG_DONT_CAPABILITY, 0, peer_change_none},
3869 {PEER_FLAG_OVERRIDE_CAPABILITY, 0, peer_change_none},
3870 {PEER_FLAG_STRICT_CAP_MATCH, 0, peer_change_none},
3871 {PEER_FLAG_DYNAMIC_CAPABILITY, 0, peer_change_reset},
3872 {PEER_FLAG_DISABLE_CONNECTED_CHECK, 0, peer_change_reset},
3873 {PEER_FLAG_CAPABILITY_ENHE, 0, peer_change_reset},
3874 {PEER_FLAG_ENFORCE_FIRST_AS, 0, peer_change_reset_in},
3875 {PEER_FLAG_IFPEER_V6ONLY, 0, peer_change_reset},
3876 {PEER_FLAG_ROUTEADV, 0, peer_change_none},
3877 {PEER_FLAG_TIMER, 0, peer_change_none},
3878 {PEER_FLAG_TIMER_CONNECT, 0, peer_change_none},
3879 {PEER_FLAG_PASSWORD, 0, peer_change_none},
3880 {PEER_FLAG_LOCAL_AS, 0, peer_change_none},
3881 {PEER_FLAG_LOCAL_AS_NO_PREPEND, 0, peer_change_none},
3882 {PEER_FLAG_LOCAL_AS_REPLACE_AS, 0, peer_change_none},
3883 {PEER_FLAG_UPDATE_SOURCE, 0, peer_change_none},
3884 {0, 0, 0}};
3885
3886 static const struct peer_flag_action peer_af_flag_action_list[] = {
3887 {PEER_FLAG_SEND_COMMUNITY, 1, peer_change_reset_out},
3888 {PEER_FLAG_SEND_EXT_COMMUNITY, 1, peer_change_reset_out},
3889 {PEER_FLAG_SEND_LARGE_COMMUNITY, 1, peer_change_reset_out},
3890 {PEER_FLAG_NEXTHOP_SELF, 1, peer_change_reset_out},
3891 {PEER_FLAG_REFLECTOR_CLIENT, 1, peer_change_reset},
3892 {PEER_FLAG_RSERVER_CLIENT, 1, peer_change_reset},
3893 {PEER_FLAG_SOFT_RECONFIG, 0, peer_change_reset_in},
3894 {PEER_FLAG_AS_PATH_UNCHANGED, 1, peer_change_reset_out},
3895 {PEER_FLAG_NEXTHOP_UNCHANGED, 1, peer_change_reset_out},
3896 {PEER_FLAG_MED_UNCHANGED, 1, peer_change_reset_out},
3897 {PEER_FLAG_DEFAULT_ORIGINATE, 0, peer_change_none},
3898 {PEER_FLAG_REMOVE_PRIVATE_AS, 1, peer_change_reset_out},
3899 {PEER_FLAG_ALLOWAS_IN, 0, peer_change_reset_in},
3900 {PEER_FLAG_ALLOWAS_IN_ORIGIN, 0, peer_change_reset_in},
3901 {PEER_FLAG_ORF_PREFIX_SM, 1, peer_change_reset},
3902 {PEER_FLAG_ORF_PREFIX_RM, 1, peer_change_reset},
3903 {PEER_FLAG_MAX_PREFIX, 0, peer_change_none},
3904 {PEER_FLAG_MAX_PREFIX_WARNING, 0, peer_change_none},
3905 {PEER_FLAG_MAX_PREFIX_FORCE, 0, peer_change_none},
3906 {PEER_FLAG_NEXTHOP_LOCAL_UNCHANGED, 0, peer_change_reset_out},
3907 {PEER_FLAG_FORCE_NEXTHOP_SELF, 1, peer_change_reset_out},
3908 {PEER_FLAG_REMOVE_PRIVATE_AS_ALL, 1, peer_change_reset_out},
3909 {PEER_FLAG_REMOVE_PRIVATE_AS_REPLACE, 1, peer_change_reset_out},
3910 {PEER_FLAG_AS_OVERRIDE, 1, peer_change_reset_out},
3911 {PEER_FLAG_REMOVE_PRIVATE_AS_ALL_REPLACE, 1, peer_change_reset_out},
3912 {PEER_FLAG_WEIGHT, 0, peer_change_reset_in},
3913 {0, 0, 0}};
3914
3915 /* Proper action set. */
3916 static int peer_flag_action_set(const struct peer_flag_action *action_list,
3917 int size, struct peer_flag_action *action,
3918 uint32_t flag)
3919 {
3920 int i;
3921 int found = 0;
3922 int reset_in = 0;
3923 int reset_out = 0;
3924 const struct peer_flag_action *match = NULL;
3925
3926 /* Check peer's frag action. */
3927 for (i = 0; i < size; i++) {
3928 match = &action_list[i];
3929
3930 if (match->flag == 0)
3931 break;
3932
3933 if (match->flag & flag) {
3934 found = 1;
3935
3936 if (match->type == peer_change_reset_in)
3937 reset_in = 1;
3938 if (match->type == peer_change_reset_out)
3939 reset_out = 1;
3940 if (match->type == peer_change_reset) {
3941 reset_in = 1;
3942 reset_out = 1;
3943 }
3944 if (match->not_for_member)
3945 action->not_for_member = 1;
3946 }
3947 }
3948
3949 /* Set peer clear type. */
3950 if (reset_in && reset_out)
3951 action->type = peer_change_reset;
3952 else if (reset_in)
3953 action->type = peer_change_reset_in;
3954 else if (reset_out)
3955 action->type = peer_change_reset_out;
3956 else
3957 action->type = peer_change_none;
3958
3959 return found;
3960 }
3961
3962 static void peer_flag_modify_action(struct peer *peer, uint32_t flag)
3963 {
3964 if (flag == PEER_FLAG_SHUTDOWN) {
3965 if (CHECK_FLAG(peer->flags, flag)) {
3966 if (CHECK_FLAG(peer->sflags, PEER_STATUS_NSF_WAIT))
3967 peer_nsf_stop(peer);
3968
3969 UNSET_FLAG(peer->sflags, PEER_STATUS_PREFIX_OVERFLOW);
3970 if (peer->t_pmax_restart) {
3971 BGP_TIMER_OFF(peer->t_pmax_restart);
3972 if (bgp_debug_neighbor_events(peer))
3973 zlog_debug(
3974 "%s Maximum-prefix restart timer canceled",
3975 peer->host);
3976 }
3977
3978 if (CHECK_FLAG(peer->sflags, PEER_STATUS_NSF_WAIT))
3979 peer_nsf_stop(peer);
3980
3981 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status)) {
3982 char *msg = peer->tx_shutdown_message;
3983 size_t msglen;
3984
3985 if (!msg && peer_group_active(peer))
3986 msg = peer->group->conf
3987 ->tx_shutdown_message;
3988 msglen = msg ? strlen(msg) : 0;
3989 if (msglen > 128)
3990 msglen = 128;
3991
3992 if (msglen) {
3993 uint8_t msgbuf[129];
3994
3995 msgbuf[0] = msglen;
3996 memcpy(msgbuf + 1, msg, msglen);
3997
3998 bgp_notify_send_with_data(
3999 peer, BGP_NOTIFY_CEASE,
4000 BGP_NOTIFY_CEASE_ADMIN_SHUTDOWN,
4001 msgbuf, msglen + 1);
4002 } else
4003 bgp_notify_send(
4004 peer, BGP_NOTIFY_CEASE,
4005 BGP_NOTIFY_CEASE_ADMIN_SHUTDOWN);
4006 } else
4007 bgp_session_reset(peer);
4008 } else {
4009 peer->v_start = BGP_INIT_START_TIMER;
4010 BGP_EVENT_ADD(peer, BGP_Stop);
4011 }
4012 } else if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status)) {
4013 if (flag == PEER_FLAG_DYNAMIC_CAPABILITY)
4014 peer->last_reset = PEER_DOWN_CAPABILITY_CHANGE;
4015 else if (flag == PEER_FLAG_PASSIVE)
4016 peer->last_reset = PEER_DOWN_PASSIVE_CHANGE;
4017 else if (flag == PEER_FLAG_DISABLE_CONNECTED_CHECK)
4018 peer->last_reset = PEER_DOWN_MULTIHOP_CHANGE;
4019
4020 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
4021 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4022 } else
4023 bgp_session_reset(peer);
4024 }
4025
4026 /* Change specified peer flag. */
4027 static int peer_flag_modify(struct peer *peer, uint32_t flag, int set)
4028 {
4029 int found;
4030 int size;
4031 bool invert, member_invert;
4032 struct peer *member;
4033 struct listnode *node, *nnode;
4034 struct peer_flag_action action;
4035
4036 memset(&action, 0, sizeof(struct peer_flag_action));
4037 size = sizeof(peer_flag_action_list) / sizeof(struct peer_flag_action);
4038
4039 invert = CHECK_FLAG(peer->flags_invert, flag);
4040 found = peer_flag_action_set(peer_flag_action_list, size, &action,
4041 flag);
4042
4043 /* Abort if no flag action exists. */
4044 if (!found)
4045 return BGP_ERR_INVALID_FLAG;
4046
4047 /* Check for flag conflict: STRICT_CAP_MATCH && OVERRIDE_CAPABILITY */
4048 if (set && CHECK_FLAG(peer->flags | flag, PEER_FLAG_STRICT_CAP_MATCH)
4049 && CHECK_FLAG(peer->flags | flag, PEER_FLAG_OVERRIDE_CAPABILITY))
4050 return BGP_ERR_PEER_FLAG_CONFLICT;
4051
4052 /* Handle flag updates where desired state matches current state. */
4053 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4054 if (set && CHECK_FLAG(peer->flags, flag)) {
4055 COND_FLAG(peer->flags_override, flag, !invert);
4056 return 0;
4057 }
4058
4059 if (!set && !CHECK_FLAG(peer->flags, flag)) {
4060 COND_FLAG(peer->flags_override, flag, invert);
4061 return 0;
4062 }
4063 }
4064
4065 /* Inherit from peer-group or set/unset flags accordingly. */
4066 if (peer_group_active(peer) && set == invert)
4067 peer_flag_inherit(peer, flag);
4068 else
4069 COND_FLAG(peer->flags, flag, set);
4070
4071 /* Check if handling a regular peer. */
4072 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4073 /* Update flag override state accordingly. */
4074 COND_FLAG(peer->flags_override, flag, set != invert);
4075
4076 /*
4077 * For the extended next-hop encoding flag we need to turn RAs
4078 * on if flag is being set, but only turn RAs off if the flag
4079 * is being unset on this peer and if this peer is a member of a
4080 * peer-group, the peer-group also doesn't have the flag set.
4081 */
4082 if (flag == PEER_FLAG_CAPABILITY_ENHE) {
4083 if (set) {
4084 bgp_zebra_initiate_radv(peer->bgp, peer);
4085 } else if (peer_group_active(peer)) {
4086 if (!CHECK_FLAG(peer->group->conf->flags, flag))
4087 bgp_zebra_terminate_radv(peer->bgp,
4088 peer);
4089 } else
4090 bgp_zebra_terminate_radv(peer->bgp, peer);
4091 }
4092
4093 /* Execute flag action on peer. */
4094 if (action.type == peer_change_reset)
4095 peer_flag_modify_action(peer, flag);
4096
4097 /* Skip peer-group mechanics for regular peers. */
4098 return 0;
4099 }
4100
4101 /*
4102 * Update peer-group members, unless they are explicitely overriding
4103 * peer-group configuration.
4104 */
4105 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
4106 /* Skip peers with overridden configuration. */
4107 if (CHECK_FLAG(member->flags_override, flag))
4108 continue;
4109
4110 /* Check if only member without group is inverted. */
4111 member_invert =
4112 CHECK_FLAG(member->flags_invert, flag) && !invert;
4113
4114 /* Skip peers with equivalent configuration. */
4115 if (set != member_invert && CHECK_FLAG(member->flags, flag))
4116 continue;
4117
4118 if (set == member_invert && !CHECK_FLAG(member->flags, flag))
4119 continue;
4120
4121 /* Update flag on peer-group member. */
4122 COND_FLAG(member->flags, flag, set != member_invert);
4123
4124 if (flag == PEER_FLAG_CAPABILITY_ENHE)
4125 set ? bgp_zebra_initiate_radv(member->bgp, member)
4126 : bgp_zebra_terminate_radv(member->bgp, member);
4127
4128 /* Execute flag action on peer-group member. */
4129 if (action.type == peer_change_reset)
4130 peer_flag_modify_action(member, flag);
4131 }
4132
4133 return 0;
4134 }
4135
4136 int peer_flag_set(struct peer *peer, uint32_t flag)
4137 {
4138 return peer_flag_modify(peer, flag, 1);
4139 }
4140
4141 int peer_flag_unset(struct peer *peer, uint32_t flag)
4142 {
4143 return peer_flag_modify(peer, flag, 0);
4144 }
4145
4146 static int peer_af_flag_modify(struct peer *peer, afi_t afi, safi_t safi,
4147 uint32_t flag, bool set)
4148 {
4149 int found;
4150 int size;
4151 bool invert, member_invert;
4152 struct peer *member;
4153 struct listnode *node, *nnode;
4154 struct peer_flag_action action;
4155 bgp_peer_sort_t ptype;
4156
4157 memset(&action, 0, sizeof(struct peer_flag_action));
4158 size = sizeof(peer_af_flag_action_list)
4159 / sizeof(struct peer_flag_action);
4160
4161 invert = CHECK_FLAG(peer->af_flags_invert[afi][safi], flag);
4162 found = peer_flag_action_set(peer_af_flag_action_list, size, &action,
4163 flag);
4164
4165 /* Abort if flag action exists. */
4166 if (!found)
4167 return BGP_ERR_INVALID_FLAG;
4168
4169 ptype = peer_sort(peer);
4170 /* Special check for reflector client. */
4171 if (flag & PEER_FLAG_REFLECTOR_CLIENT && ptype != BGP_PEER_IBGP)
4172 return BGP_ERR_NOT_INTERNAL_PEER;
4173
4174 /* Special check for remove-private-AS. */
4175 if (flag & PEER_FLAG_REMOVE_PRIVATE_AS && ptype == BGP_PEER_IBGP)
4176 return BGP_ERR_REMOVE_PRIVATE_AS;
4177
4178 /* as-override is not allowed for IBGP peers */
4179 if (flag & PEER_FLAG_AS_OVERRIDE && ptype == BGP_PEER_IBGP)
4180 return BGP_ERR_AS_OVERRIDE;
4181
4182 /* Handle flag updates where desired state matches current state. */
4183 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4184 if (set && CHECK_FLAG(peer->af_flags[afi][safi], flag)) {
4185 COND_FLAG(peer->af_flags_override[afi][safi], flag,
4186 !invert);
4187 return 0;
4188 }
4189
4190 if (!set && !CHECK_FLAG(peer->af_flags[afi][safi], flag)) {
4191 COND_FLAG(peer->af_flags_override[afi][safi], flag,
4192 invert);
4193 return 0;
4194 }
4195 }
4196
4197 /*
4198 * For EVPN we implicitly set the NEXTHOP_UNCHANGED flag,
4199 * if we are setting/unsetting flags which conflict with this flag
4200 * handle accordingly
4201 */
4202 if (afi == AFI_L2VPN && safi == SAFI_EVPN) {
4203 if (set) {
4204
4205 /*
4206 * if we are setting NEXTHOP_SELF, we need to unset the
4207 * NEXTHOP_UNCHANGED flag
4208 */
4209 if (CHECK_FLAG(flag, PEER_FLAG_NEXTHOP_SELF) ||
4210 CHECK_FLAG(flag, PEER_FLAG_FORCE_NEXTHOP_SELF))
4211 UNSET_FLAG(peer->af_flags[afi][safi],
4212 PEER_FLAG_NEXTHOP_UNCHANGED);
4213 } else {
4214
4215 /*
4216 * if we are unsetting NEXTHOP_SELF, we need to set the
4217 * NEXTHOP_UNCHANGED flag to reset the defaults for EVPN
4218 */
4219 if (CHECK_FLAG(flag, PEER_FLAG_NEXTHOP_SELF) ||
4220 CHECK_FLAG(flag, PEER_FLAG_FORCE_NEXTHOP_SELF))
4221 SET_FLAG(peer->af_flags[afi][safi],
4222 PEER_FLAG_NEXTHOP_UNCHANGED);
4223 }
4224 }
4225
4226 /*
4227 * If the peer is a route server client let's not
4228 * muck with the nexthop on the way out the door
4229 */
4230 if (flag & PEER_FLAG_RSERVER_CLIENT) {
4231 if (set)
4232 SET_FLAG(peer->af_flags[afi][safi],
4233 PEER_FLAG_NEXTHOP_UNCHANGED);
4234 else
4235 UNSET_FLAG(peer->af_flags[afi][safi],
4236 PEER_FLAG_NEXTHOP_UNCHANGED);
4237 }
4238
4239 /* Inherit from peer-group or set/unset flags accordingly. */
4240 if (peer_group_active(peer) && set == invert)
4241 peer_af_flag_inherit(peer, afi, safi, flag);
4242 else
4243 COND_FLAG(peer->af_flags[afi][safi], flag, set);
4244
4245 /* Execute action when peer is established. */
4246 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)
4247 && peer->status == Established) {
4248 if (!set && flag == PEER_FLAG_SOFT_RECONFIG)
4249 bgp_clear_adj_in(peer, afi, safi);
4250 else {
4251 if (flag == PEER_FLAG_REFLECTOR_CLIENT)
4252 peer->last_reset = PEER_DOWN_RR_CLIENT_CHANGE;
4253 else if (flag == PEER_FLAG_RSERVER_CLIENT)
4254 peer->last_reset = PEER_DOWN_RS_CLIENT_CHANGE;
4255 else if (flag == PEER_FLAG_ORF_PREFIX_SM)
4256 peer->last_reset = PEER_DOWN_CAPABILITY_CHANGE;
4257 else if (flag == PEER_FLAG_ORF_PREFIX_RM)
4258 peer->last_reset = PEER_DOWN_CAPABILITY_CHANGE;
4259
4260 peer_change_action(peer, afi, safi, action.type);
4261 }
4262 }
4263
4264 /* Check if handling a regular peer. */
4265 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4266 COND_FLAG(peer->af_flags_override[afi][safi], flag,
4267 set != invert);
4268 } else {
4269 /*
4270 * Update peer-group members, unless they are explicitely
4271 * overriding peer-group configuration.
4272 */
4273 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode,
4274 member)) {
4275 /* Skip peers with overridden configuration. */
4276 if (CHECK_FLAG(member->af_flags_override[afi][safi],
4277 flag))
4278 continue;
4279
4280 /* Check if only member without group is inverted. */
4281 member_invert =
4282 CHECK_FLAG(member->af_flags_invert[afi][safi],
4283 flag)
4284 && !invert;
4285
4286 /* Skip peers with equivalent configuration. */
4287 if (set != member_invert
4288 && CHECK_FLAG(member->af_flags[afi][safi], flag))
4289 continue;
4290
4291 if (set == member_invert
4292 && !CHECK_FLAG(member->af_flags[afi][safi], flag))
4293 continue;
4294
4295 /* Update flag on peer-group member. */
4296 COND_FLAG(member->af_flags[afi][safi], flag,
4297 set != member_invert);
4298
4299 /* Execute flag action on peer-group member. */
4300 if (member->status == Established) {
4301 if (!set && flag == PEER_FLAG_SOFT_RECONFIG)
4302 bgp_clear_adj_in(member, afi, safi);
4303 else {
4304 if (flag == PEER_FLAG_REFLECTOR_CLIENT)
4305 member->last_reset =
4306 PEER_DOWN_RR_CLIENT_CHANGE;
4307 else if (flag
4308 == PEER_FLAG_RSERVER_CLIENT)
4309 member->last_reset =
4310 PEER_DOWN_RS_CLIENT_CHANGE;
4311 else if (flag
4312 == PEER_FLAG_ORF_PREFIX_SM)
4313 member->last_reset =
4314 PEER_DOWN_CAPABILITY_CHANGE;
4315 else if (flag
4316 == PEER_FLAG_ORF_PREFIX_RM)
4317 member->last_reset =
4318 PEER_DOWN_CAPABILITY_CHANGE;
4319
4320 peer_change_action(member, afi, safi,
4321 action.type);
4322 }
4323 }
4324 }
4325 }
4326
4327 return 0;
4328 }
4329
4330 int peer_af_flag_set(struct peer *peer, afi_t afi, safi_t safi, uint32_t flag)
4331 {
4332 return peer_af_flag_modify(peer, afi, safi, flag, 1);
4333 }
4334
4335 int peer_af_flag_unset(struct peer *peer, afi_t afi, safi_t safi, uint32_t flag)
4336 {
4337 return peer_af_flag_modify(peer, afi, safi, flag, 0);
4338 }
4339
4340
4341 void peer_tx_shutdown_message_set(struct peer *peer, const char *msg)
4342 {
4343 XFREE(MTYPE_PEER_TX_SHUTDOWN_MSG, peer->tx_shutdown_message);
4344 peer->tx_shutdown_message =
4345 msg ? XSTRDUP(MTYPE_PEER_TX_SHUTDOWN_MSG, msg) : NULL;
4346 }
4347
4348 void peer_tx_shutdown_message_unset(struct peer *peer)
4349 {
4350 XFREE(MTYPE_PEER_TX_SHUTDOWN_MSG, peer->tx_shutdown_message);
4351 }
4352
4353
4354 /* EBGP multihop configuration. */
4355 int peer_ebgp_multihop_set(struct peer *peer, int ttl)
4356 {
4357 struct peer_group *group;
4358 struct listnode *node, *nnode;
4359 struct peer *peer1;
4360
4361 if (peer->sort == BGP_PEER_IBGP || peer->conf_if)
4362 return 0;
4363
4364 /* see comment in peer_ttl_security_hops_set() */
4365 if (ttl != MAXTTL) {
4366 if (CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4367 group = peer->group;
4368 if (group->conf->gtsm_hops != BGP_GTSM_HOPS_DISABLED)
4369 return BGP_ERR_NO_EBGP_MULTIHOP_WITH_TTLHACK;
4370
4371 for (ALL_LIST_ELEMENTS(group->peer, node, nnode,
4372 peer1)) {
4373 if (peer1->sort == BGP_PEER_IBGP)
4374 continue;
4375
4376 if (peer1->gtsm_hops != BGP_GTSM_HOPS_DISABLED)
4377 return BGP_ERR_NO_EBGP_MULTIHOP_WITH_TTLHACK;
4378 }
4379 } else {
4380 if (peer->gtsm_hops != BGP_GTSM_HOPS_DISABLED)
4381 return BGP_ERR_NO_EBGP_MULTIHOP_WITH_TTLHACK;
4382 }
4383 }
4384
4385 peer->ttl = ttl;
4386
4387 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4388 if (peer->fd >= 0 && peer->sort != BGP_PEER_IBGP) {
4389 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status))
4390 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
4391 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4392 else
4393 bgp_session_reset(peer);
4394 }
4395 } else {
4396 group = peer->group;
4397 for (ALL_LIST_ELEMENTS(group->peer, node, nnode, peer)) {
4398 if (peer->sort == BGP_PEER_IBGP)
4399 continue;
4400
4401 peer->ttl = group->conf->ttl;
4402
4403 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status))
4404 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
4405 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4406 else
4407 bgp_session_reset(peer);
4408 }
4409 }
4410 return 0;
4411 }
4412
4413 int peer_ebgp_multihop_unset(struct peer *peer)
4414 {
4415 struct peer_group *group;
4416 struct listnode *node, *nnode;
4417
4418 if (peer->sort == BGP_PEER_IBGP)
4419 return 0;
4420
4421 if (peer->gtsm_hops != BGP_GTSM_HOPS_DISABLED && peer->ttl != MAXTTL)
4422 return BGP_ERR_NO_EBGP_MULTIHOP_WITH_TTLHACK;
4423
4424 if (peer_group_active(peer))
4425 peer->ttl = peer->group->conf->ttl;
4426 else
4427 peer->ttl = BGP_DEFAULT_TTL;
4428
4429 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4430 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status))
4431 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
4432 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4433 else
4434 bgp_session_reset(peer);
4435 } else {
4436 group = peer->group;
4437 for (ALL_LIST_ELEMENTS(group->peer, node, nnode, peer)) {
4438 if (peer->sort == BGP_PEER_IBGP)
4439 continue;
4440
4441 peer->ttl = BGP_DEFAULT_TTL;
4442
4443 if (peer->fd >= 0) {
4444 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status))
4445 bgp_notify_send(
4446 peer, BGP_NOTIFY_CEASE,
4447 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4448 else
4449 bgp_session_reset(peer);
4450 }
4451 }
4452 }
4453 return 0;
4454 }
4455
4456 /* Neighbor description. */
4457 void peer_description_set(struct peer *peer, const char *desc)
4458 {
4459 XFREE(MTYPE_PEER_DESC, peer->desc);
4460
4461 peer->desc = XSTRDUP(MTYPE_PEER_DESC, desc);
4462 }
4463
4464 void peer_description_unset(struct peer *peer)
4465 {
4466 XFREE(MTYPE_PEER_DESC, peer->desc);
4467 }
4468
4469 /* Neighbor update-source. */
4470 int peer_update_source_if_set(struct peer *peer, const char *ifname)
4471 {
4472 struct peer *member;
4473 struct listnode *node, *nnode;
4474
4475 /* Set flag and configuration on peer. */
4476 peer_flag_set(peer, PEER_FLAG_UPDATE_SOURCE);
4477 if (peer->update_if) {
4478 if (strcmp(peer->update_if, ifname) == 0)
4479 return 0;
4480 XFREE(MTYPE_PEER_UPDATE_SOURCE, peer->update_if);
4481 }
4482 peer->update_if = XSTRDUP(MTYPE_PEER_UPDATE_SOURCE, ifname);
4483 sockunion_free(peer->update_source);
4484 peer->update_source = NULL;
4485
4486 /* Check if handling a regular peer. */
4487 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4488 /* Send notification or reset peer depending on state. */
4489 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status)) {
4490 peer->last_reset = PEER_DOWN_UPDATE_SOURCE_CHANGE;
4491 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
4492 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4493 } else
4494 bgp_session_reset(peer);
4495
4496 /* Skip peer-group mechanics for regular peers. */
4497 return 0;
4498 }
4499
4500 /*
4501 * Set flag and configuration on all peer-group members, unless they are
4502 * explicitely overriding peer-group configuration.
4503 */
4504 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
4505 /* Skip peers with overridden configuration. */
4506 if (CHECK_FLAG(member->flags_override, PEER_FLAG_UPDATE_SOURCE))
4507 continue;
4508
4509 /* Skip peers with the same configuration. */
4510 if (member->update_if) {
4511 if (strcmp(member->update_if, ifname) == 0)
4512 continue;
4513 XFREE(MTYPE_PEER_UPDATE_SOURCE, member->update_if);
4514 }
4515
4516 /* Set flag and configuration on peer-group member. */
4517 SET_FLAG(member->flags, PEER_FLAG_UPDATE_SOURCE);
4518 member->update_if = XSTRDUP(MTYPE_PEER_UPDATE_SOURCE, ifname);
4519 sockunion_free(member->update_source);
4520 member->update_source = NULL;
4521
4522 /* Send notification or reset peer depending on state. */
4523 if (BGP_IS_VALID_STATE_FOR_NOTIF(member->status)) {
4524 member->last_reset = PEER_DOWN_UPDATE_SOURCE_CHANGE;
4525 bgp_notify_send(member, BGP_NOTIFY_CEASE,
4526 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4527 } else
4528 bgp_session_reset(member);
4529 }
4530
4531 return 0;
4532 }
4533
4534 int peer_update_source_addr_set(struct peer *peer, const union sockunion *su)
4535 {
4536 struct peer *member;
4537 struct listnode *node, *nnode;
4538
4539 /* Set flag and configuration on peer. */
4540 peer_flag_set(peer, PEER_FLAG_UPDATE_SOURCE);
4541 if (peer->update_source) {
4542 if (sockunion_cmp(peer->update_source, su) == 0)
4543 return 0;
4544 sockunion_free(peer->update_source);
4545 }
4546 peer->update_source = sockunion_dup(su);
4547 XFREE(MTYPE_PEER_UPDATE_SOURCE, peer->update_if);
4548
4549 /* Check if handling a regular peer. */
4550 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4551 /* Send notification or reset peer depending on state. */
4552 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status)) {
4553 peer->last_reset = PEER_DOWN_UPDATE_SOURCE_CHANGE;
4554 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
4555 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4556 } else
4557 bgp_session_reset(peer);
4558
4559 /* Skip peer-group mechanics for regular peers. */
4560 return 0;
4561 }
4562
4563 /*
4564 * Set flag and configuration on all peer-group members, unless they are
4565 * explicitely overriding peer-group configuration.
4566 */
4567 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
4568 /* Skip peers with overridden configuration. */
4569 if (CHECK_FLAG(member->flags_override, PEER_FLAG_UPDATE_SOURCE))
4570 continue;
4571
4572 /* Skip peers with the same configuration. */
4573 if (member->update_source) {
4574 if (sockunion_cmp(member->update_source, su) == 0)
4575 continue;
4576 sockunion_free(member->update_source);
4577 }
4578
4579 /* Set flag and configuration on peer-group member. */
4580 SET_FLAG(member->flags, PEER_FLAG_UPDATE_SOURCE);
4581 member->update_source = sockunion_dup(su);
4582 XFREE(MTYPE_PEER_UPDATE_SOURCE, member->update_if);
4583
4584 /* Send notification or reset peer depending on state. */
4585 if (BGP_IS_VALID_STATE_FOR_NOTIF(member->status)) {
4586 member->last_reset = PEER_DOWN_UPDATE_SOURCE_CHANGE;
4587 bgp_notify_send(member, BGP_NOTIFY_CEASE,
4588 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4589 } else
4590 bgp_session_reset(member);
4591 }
4592
4593 return 0;
4594 }
4595
4596 int peer_update_source_unset(struct peer *peer)
4597 {
4598 struct peer *member;
4599 struct listnode *node, *nnode;
4600
4601 if (!CHECK_FLAG(peer->flags, PEER_FLAG_UPDATE_SOURCE))
4602 return 0;
4603
4604 /* Inherit configuration from peer-group if peer is member. */
4605 if (peer_group_active(peer)) {
4606 peer_flag_inherit(peer, PEER_FLAG_UPDATE_SOURCE);
4607 PEER_SU_ATTR_INHERIT(peer, peer->group, update_source);
4608 PEER_STR_ATTR_INHERIT(peer, peer->group, update_if,
4609 MTYPE_PEER_UPDATE_SOURCE);
4610 } else {
4611 /* Otherwise remove flag and configuration from peer. */
4612 peer_flag_unset(peer, PEER_FLAG_UPDATE_SOURCE);
4613 sockunion_free(peer->update_source);
4614 peer->update_source = NULL;
4615 XFREE(MTYPE_PEER_UPDATE_SOURCE, peer->update_if);
4616 }
4617
4618 /* Check if handling a regular peer. */
4619 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4620 /* Send notification or reset peer depending on state. */
4621 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status)) {
4622 peer->last_reset = PEER_DOWN_UPDATE_SOURCE_CHANGE;
4623 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
4624 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4625 } else
4626 bgp_session_reset(peer);
4627
4628 /* Skip peer-group mechanics for regular peers. */
4629 return 0;
4630 }
4631
4632 /*
4633 * Set flag and configuration on all peer-group members, unless they are
4634 * explicitely overriding peer-group configuration.
4635 */
4636 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
4637 /* Skip peers with overridden configuration. */
4638 if (CHECK_FLAG(member->flags_override, PEER_FLAG_UPDATE_SOURCE))
4639 continue;
4640
4641 /* Skip peers with the same configuration. */
4642 if (!CHECK_FLAG(member->flags, PEER_FLAG_UPDATE_SOURCE)
4643 && !member->update_source && !member->update_if)
4644 continue;
4645
4646 /* Remove flag and configuration on peer-group member. */
4647 UNSET_FLAG(member->flags, PEER_FLAG_UPDATE_SOURCE);
4648 sockunion_free(member->update_source);
4649 member->update_source = NULL;
4650 XFREE(MTYPE_PEER_UPDATE_SOURCE, member->update_if);
4651
4652 /* Send notification or reset peer depending on state. */
4653 if (BGP_IS_VALID_STATE_FOR_NOTIF(member->status)) {
4654 member->last_reset = PEER_DOWN_UPDATE_SOURCE_CHANGE;
4655 bgp_notify_send(member, BGP_NOTIFY_CEASE,
4656 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4657 } else
4658 bgp_session_reset(member);
4659 }
4660
4661 return 0;
4662 }
4663
4664 int peer_default_originate_set(struct peer *peer, afi_t afi, safi_t safi,
4665 const char *rmap, struct route_map *route_map)
4666 {
4667 struct peer *member;
4668 struct listnode *node, *nnode;
4669
4670 /* Set flag and configuration on peer. */
4671 peer_af_flag_set(peer, afi, safi, PEER_FLAG_DEFAULT_ORIGINATE);
4672 if (rmap) {
4673 if (!peer->default_rmap[afi][safi].name
4674 || strcmp(rmap, peer->default_rmap[afi][safi].name) != 0) {
4675 if (peer->default_rmap[afi][safi].name)
4676 XFREE(MTYPE_ROUTE_MAP_NAME,
4677 peer->default_rmap[afi][safi].name);
4678
4679 route_map_counter_decrement(peer->default_rmap[afi][safi].map);
4680 peer->default_rmap[afi][safi].name =
4681 XSTRDUP(MTYPE_ROUTE_MAP_NAME, rmap);
4682 peer->default_rmap[afi][safi].map = route_map;
4683 route_map_counter_increment(route_map);
4684 }
4685 } else if (!rmap) {
4686 if (peer->default_rmap[afi][safi].name)
4687 XFREE(MTYPE_ROUTE_MAP_NAME,
4688 peer->default_rmap[afi][safi].name);
4689
4690 route_map_counter_decrement(peer->default_rmap[afi][safi].map);
4691 peer->default_rmap[afi][safi].name = NULL;
4692 peer->default_rmap[afi][safi].map = NULL;
4693 }
4694
4695 /* Check if handling a regular peer. */
4696 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4697 /* Update peer route announcements. */
4698 if (peer->status == Established && peer->afc_nego[afi][safi]) {
4699 update_group_adjust_peer(peer_af_find(peer, afi, safi));
4700 bgp_default_originate(peer, afi, safi, 0);
4701 bgp_announce_route(peer, afi, safi);
4702 }
4703
4704 /* Skip peer-group mechanics for regular peers. */
4705 return 0;
4706 }
4707
4708 /*
4709 * Set flag and configuration on all peer-group members, unless they are
4710 * explicitely overriding peer-group configuration.
4711 */
4712 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
4713 /* Skip peers with overridden configuration. */
4714 if (CHECK_FLAG(member->af_flags_override[afi][safi],
4715 PEER_FLAG_DEFAULT_ORIGINATE))
4716 continue;
4717
4718 /* Set flag and configuration on peer-group member. */
4719 SET_FLAG(member->af_flags[afi][safi],
4720 PEER_FLAG_DEFAULT_ORIGINATE);
4721 if (rmap) {
4722 if (member->default_rmap[afi][safi].name)
4723 XFREE(MTYPE_ROUTE_MAP_NAME,
4724 member->default_rmap[afi][safi].name);
4725 route_map_counter_decrement(
4726 member->default_rmap[afi][safi].map);
4727 member->default_rmap[afi][safi].name =
4728 XSTRDUP(MTYPE_ROUTE_MAP_NAME, rmap);
4729 member->default_rmap[afi][safi].map = route_map;
4730 route_map_counter_increment(route_map);
4731 }
4732
4733 /* Update peer route announcements. */
4734 if (member->status == Established
4735 && member->afc_nego[afi][safi]) {
4736 update_group_adjust_peer(
4737 peer_af_find(member, afi, safi));
4738 bgp_default_originate(member, afi, safi, 0);
4739 bgp_announce_route(member, afi, safi);
4740 }
4741 }
4742
4743 return 0;
4744 }
4745
4746 int peer_default_originate_unset(struct peer *peer, afi_t afi, safi_t safi)
4747 {
4748 struct peer *member;
4749 struct listnode *node, *nnode;
4750
4751 /* Inherit configuration from peer-group if peer is member. */
4752 if (peer_group_active(peer)) {
4753 peer_af_flag_inherit(peer, afi, safi,
4754 PEER_FLAG_DEFAULT_ORIGINATE);
4755 PEER_STR_ATTR_INHERIT(peer, peer->group,
4756 default_rmap[afi][safi].name,
4757 MTYPE_ROUTE_MAP_NAME);
4758 PEER_ATTR_INHERIT(peer, peer->group,
4759 default_rmap[afi][safi].map);
4760 } else {
4761 /* Otherwise remove flag and configuration from peer. */
4762 peer_af_flag_unset(peer, afi, safi,
4763 PEER_FLAG_DEFAULT_ORIGINATE);
4764 if (peer->default_rmap[afi][safi].name)
4765 XFREE(MTYPE_ROUTE_MAP_NAME,
4766 peer->default_rmap[afi][safi].name);
4767 route_map_counter_decrement(peer->default_rmap[afi][safi].map);
4768 peer->default_rmap[afi][safi].name = NULL;
4769 peer->default_rmap[afi][safi].map = NULL;
4770 }
4771
4772 /* Check if handling a regular peer. */
4773 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4774 /* Update peer route announcements. */
4775 if (peer->status == Established && peer->afc_nego[afi][safi]) {
4776 update_group_adjust_peer(peer_af_find(peer, afi, safi));
4777 bgp_default_originate(peer, afi, safi, 1);
4778 bgp_announce_route(peer, afi, safi);
4779 }
4780
4781 /* Skip peer-group mechanics for regular peers. */
4782 return 0;
4783 }
4784
4785 /*
4786 * Remove flag and configuration from all peer-group members, unless
4787 * they are explicitely overriding peer-group configuration.
4788 */
4789 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
4790 /* Skip peers with overridden configuration. */
4791 if (CHECK_FLAG(member->af_flags_override[afi][safi],
4792 PEER_FLAG_DEFAULT_ORIGINATE))
4793 continue;
4794
4795 /* Remove flag and configuration on peer-group member. */
4796 UNSET_FLAG(peer->af_flags[afi][safi],
4797 PEER_FLAG_DEFAULT_ORIGINATE);
4798 if (peer->default_rmap[afi][safi].name)
4799 XFREE(MTYPE_ROUTE_MAP_NAME,
4800 peer->default_rmap[afi][safi].name);
4801 route_map_counter_decrement(peer->default_rmap[afi][safi].map);
4802 peer->default_rmap[afi][safi].name = NULL;
4803 peer->default_rmap[afi][safi].map = NULL;
4804
4805 /* Update peer route announcements. */
4806 if (peer->status == Established && peer->afc_nego[afi][safi]) {
4807 update_group_adjust_peer(peer_af_find(peer, afi, safi));
4808 bgp_default_originate(peer, afi, safi, 1);
4809 bgp_announce_route(peer, afi, safi);
4810 }
4811 }
4812
4813 return 0;
4814 }
4815
4816 void peer_port_set(struct peer *peer, uint16_t port)
4817 {
4818 peer->port = port;
4819 }
4820
4821 void peer_port_unset(struct peer *peer)
4822 {
4823 peer->port = BGP_PORT_DEFAULT;
4824 }
4825
4826 /*
4827 * Helper function that is called after the name of the policy
4828 * being used by a peer has changed (AF specific). Automatically
4829 * initiates inbound or outbound processing as needed.
4830 */
4831 static void peer_on_policy_change(struct peer *peer, afi_t afi, safi_t safi,
4832 int outbound)
4833 {
4834 if (outbound) {
4835 update_group_adjust_peer(peer_af_find(peer, afi, safi));
4836 if (peer->status == Established)
4837 bgp_announce_route(peer, afi, safi);
4838 } else {
4839 if (peer->status != Established)
4840 return;
4841
4842 if (CHECK_FLAG(peer->af_flags[afi][safi],
4843 PEER_FLAG_SOFT_RECONFIG))
4844 bgp_soft_reconfig_in(peer, afi, safi);
4845 else if (CHECK_FLAG(peer->cap, PEER_CAP_REFRESH_OLD_RCV)
4846 || CHECK_FLAG(peer->cap, PEER_CAP_REFRESH_NEW_RCV))
4847 bgp_route_refresh_send(peer, afi, safi, 0, 0, 0);
4848 }
4849 }
4850
4851
4852 /* neighbor weight. */
4853 int peer_weight_set(struct peer *peer, afi_t afi, safi_t safi, uint16_t weight)
4854 {
4855 struct peer *member;
4856 struct listnode *node, *nnode;
4857
4858 /* Set flag and configuration on peer. */
4859 peer_af_flag_set(peer, afi, safi, PEER_FLAG_WEIGHT);
4860 if (peer->weight[afi][safi] != weight) {
4861 peer->weight[afi][safi] = weight;
4862 peer_on_policy_change(peer, afi, safi, 0);
4863 }
4864
4865 /* Skip peer-group mechanics for regular peers. */
4866 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP))
4867 return 0;
4868
4869 /*
4870 * Set flag and configuration on all peer-group members, unless they are
4871 * explicitely overriding peer-group configuration.
4872 */
4873 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
4874 /* Skip peers with overridden configuration. */
4875 if (CHECK_FLAG(member->af_flags_override[afi][safi],
4876 PEER_FLAG_WEIGHT))
4877 continue;
4878
4879 /* Set flag and configuration on peer-group member. */
4880 SET_FLAG(member->af_flags[afi][safi], PEER_FLAG_WEIGHT);
4881 if (member->weight[afi][safi] != weight) {
4882 member->weight[afi][safi] = weight;
4883 peer_on_policy_change(member, afi, safi, 0);
4884 }
4885 }
4886
4887 return 0;
4888 }
4889
4890 int peer_weight_unset(struct peer *peer, afi_t afi, safi_t safi)
4891 {
4892 struct peer *member;
4893 struct listnode *node, *nnode;
4894
4895 if (!CHECK_FLAG(peer->af_flags[afi][safi], PEER_FLAG_WEIGHT))
4896 return 0;
4897
4898 /* Inherit configuration from peer-group if peer is member. */
4899 if (peer_group_active(peer)) {
4900 peer_af_flag_inherit(peer, afi, safi, PEER_FLAG_WEIGHT);
4901 PEER_ATTR_INHERIT(peer, peer->group, weight[afi][safi]);
4902
4903 peer_on_policy_change(peer, afi, safi, 0);
4904 return 0;
4905 }
4906
4907 /* Remove flag and configuration from peer. */
4908 peer_af_flag_unset(peer, afi, safi, PEER_FLAG_WEIGHT);
4909 peer->weight[afi][safi] = 0;
4910 peer_on_policy_change(peer, afi, safi, 0);
4911
4912 /* Skip peer-group mechanics for regular peers. */
4913 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP))
4914 return 0;
4915
4916 /*
4917 * Remove flag and configuration from all peer-group members, unless
4918 * they are explicitely overriding peer-group configuration.
4919 */
4920 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
4921 /* Skip peers with overridden configuration. */
4922 if (CHECK_FLAG(member->af_flags_override[afi][safi],
4923 PEER_FLAG_WEIGHT))
4924 continue;
4925
4926 /* Skip peers where flag is already disabled. */
4927 if (!CHECK_FLAG(member->af_flags[afi][safi], PEER_FLAG_WEIGHT))
4928 continue;
4929
4930 /* Remove flag and configuration on peer-group member. */
4931 UNSET_FLAG(member->af_flags[afi][safi], PEER_FLAG_WEIGHT);
4932 member->weight[afi][safi] = 0;
4933 peer_on_policy_change(member, afi, safi, 0);
4934 }
4935
4936 return 0;
4937 }
4938
4939 int peer_timers_set(struct peer *peer, uint32_t keepalive, uint32_t holdtime)
4940 {
4941 struct peer *member;
4942 struct listnode *node, *nnode;
4943
4944 if (keepalive > 65535)
4945 return BGP_ERR_INVALID_VALUE;
4946
4947 if (holdtime > 65535)
4948 return BGP_ERR_INVALID_VALUE;
4949
4950 if (holdtime < 3 && holdtime != 0)
4951 return BGP_ERR_INVALID_VALUE;
4952
4953 /* Set flag and configuration on peer. */
4954 peer_flag_set(peer, PEER_FLAG_TIMER);
4955 peer->holdtime = holdtime;
4956 peer->keepalive = (keepalive < holdtime / 3 ? keepalive : holdtime / 3);
4957
4958 /* Skip peer-group mechanics for regular peers. */
4959 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP))
4960 return 0;
4961
4962 /*
4963 * Set flag and configuration on all peer-group members, unless they are
4964 * explicitely overriding peer-group configuration.
4965 */
4966 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
4967 /* Skip peers with overridden configuration. */
4968 if (CHECK_FLAG(member->flags_override, PEER_FLAG_TIMER))
4969 continue;
4970
4971 /* Set flag and configuration on peer-group member. */
4972 SET_FLAG(member->flags, PEER_FLAG_TIMER);
4973 PEER_ATTR_INHERIT(peer, peer->group, holdtime);
4974 PEER_ATTR_INHERIT(peer, peer->group, keepalive);
4975 }
4976
4977 return 0;
4978 }
4979
4980 int peer_timers_unset(struct peer *peer)
4981 {
4982 struct peer *member;
4983 struct listnode *node, *nnode;
4984
4985 /* Inherit configuration from peer-group if peer is member. */
4986 if (peer_group_active(peer)) {
4987 peer_flag_inherit(peer, PEER_FLAG_TIMER);
4988 PEER_ATTR_INHERIT(peer, peer->group, holdtime);
4989 PEER_ATTR_INHERIT(peer, peer->group, keepalive);
4990 } else {
4991 /* Otherwise remove flag and configuration from peer. */
4992 peer_flag_unset(peer, PEER_FLAG_TIMER);
4993 peer->holdtime = 0;
4994 peer->keepalive = 0;
4995 }
4996
4997 /* Skip peer-group mechanics for regular peers. */
4998 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP))
4999 return 0;
5000
5001 /*
5002 * Remove flag and configuration from all peer-group members, unless
5003 * they are explicitely overriding peer-group configuration.
5004 */
5005 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5006 /* Skip peers with overridden configuration. */
5007 if (CHECK_FLAG(member->flags_override, PEER_FLAG_TIMER))
5008 continue;
5009
5010 /* Remove flag and configuration on peer-group member. */
5011 UNSET_FLAG(member->flags, PEER_FLAG_TIMER);
5012 member->holdtime = 0;
5013 member->keepalive = 0;
5014 }
5015
5016 return 0;
5017 }
5018
5019 int peer_timers_connect_set(struct peer *peer, uint32_t connect)
5020 {
5021 struct peer *member;
5022 struct listnode *node, *nnode;
5023
5024 if (connect > 65535)
5025 return BGP_ERR_INVALID_VALUE;
5026
5027 /* Set flag and configuration on peer. */
5028 peer_flag_set(peer, PEER_FLAG_TIMER_CONNECT);
5029 peer->connect = connect;
5030 peer->v_connect = connect;
5031
5032 /* Skip peer-group mechanics for regular peers. */
5033 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP))
5034 return 0;
5035
5036 /*
5037 * Set flag and configuration on all peer-group members, unless they are
5038 * explicitely overriding peer-group configuration.
5039 */
5040 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5041 /* Skip peers with overridden configuration. */
5042 if (CHECK_FLAG(member->flags_override, PEER_FLAG_TIMER_CONNECT))
5043 continue;
5044
5045 /* Set flag and configuration on peer-group member. */
5046 SET_FLAG(member->flags, PEER_FLAG_TIMER_CONNECT);
5047 member->connect = connect;
5048 member->v_connect = connect;
5049 }
5050
5051 return 0;
5052 }
5053
5054 int peer_timers_connect_unset(struct peer *peer)
5055 {
5056 struct peer *member;
5057 struct listnode *node, *nnode;
5058
5059 /* Inherit configuration from peer-group if peer is member. */
5060 if (peer_group_active(peer)) {
5061 peer_flag_inherit(peer, PEER_FLAG_TIMER_CONNECT);
5062 PEER_ATTR_INHERIT(peer, peer->group, connect);
5063 } else {
5064 /* Otherwise remove flag and configuration from peer. */
5065 peer_flag_unset(peer, PEER_FLAG_TIMER_CONNECT);
5066 peer->connect = 0;
5067 }
5068
5069 /* Set timer with fallback to default value. */
5070 if (peer->connect)
5071 peer->v_connect = peer->connect;
5072 else
5073 peer->v_connect = peer->bgp->default_connect_retry;
5074
5075 /* Skip peer-group mechanics for regular peers. */
5076 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP))
5077 return 0;
5078
5079 /*
5080 * Remove flag and configuration from all peer-group members, unless
5081 * they are explicitely overriding peer-group configuration.
5082 */
5083 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5084 /* Skip peers with overridden configuration. */
5085 if (CHECK_FLAG(member->flags_override, PEER_FLAG_TIMER_CONNECT))
5086 continue;
5087
5088 /* Remove flag and configuration on peer-group member. */
5089 UNSET_FLAG(member->flags, PEER_FLAG_TIMER_CONNECT);
5090 member->connect = 0;
5091 member->v_connect = peer->bgp->default_connect_retry;
5092 }
5093
5094 return 0;
5095 }
5096
5097 int peer_advertise_interval_set(struct peer *peer, uint32_t routeadv)
5098 {
5099 struct peer *member;
5100 struct listnode *node, *nnode;
5101
5102 if (routeadv > 600)
5103 return BGP_ERR_INVALID_VALUE;
5104
5105 /* Set flag and configuration on peer. */
5106 peer_flag_set(peer, PEER_FLAG_ROUTEADV);
5107 peer->routeadv = routeadv;
5108 peer->v_routeadv = routeadv;
5109
5110 /* Check if handling a regular peer. */
5111 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
5112 /* Update peer route announcements. */
5113 update_group_adjust_peer_afs(peer);
5114 if (peer->status == Established)
5115 bgp_announce_route_all(peer);
5116
5117 /* Skip peer-group mechanics for regular peers. */
5118 return 0;
5119 }
5120
5121 /*
5122 * Set flag and configuration on all peer-group members, unless they are
5123 * explicitely overriding peer-group configuration.
5124 */
5125 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5126 /* Skip peers with overridden configuration. */
5127 if (CHECK_FLAG(member->flags_override, PEER_FLAG_ROUTEADV))
5128 continue;
5129
5130 /* Set flag and configuration on peer-group member. */
5131 SET_FLAG(member->flags, PEER_FLAG_ROUTEADV);
5132 member->routeadv = routeadv;
5133 member->v_routeadv = routeadv;
5134
5135 /* Update peer route announcements. */
5136 update_group_adjust_peer_afs(member);
5137 if (member->status == Established)
5138 bgp_announce_route_all(member);
5139 }
5140
5141 return 0;
5142 }
5143
5144 int peer_advertise_interval_unset(struct peer *peer)
5145 {
5146 struct peer *member;
5147 struct listnode *node, *nnode;
5148
5149 /* Inherit configuration from peer-group if peer is member. */
5150 if (peer_group_active(peer)) {
5151 peer_flag_inherit(peer, PEER_FLAG_ROUTEADV);
5152 PEER_ATTR_INHERIT(peer, peer->group, routeadv);
5153 } else {
5154 /* Otherwise remove flag and configuration from peer. */
5155 peer_flag_unset(peer, PEER_FLAG_ROUTEADV);
5156 peer->routeadv = 0;
5157 }
5158
5159 /* Set timer with fallback to default value. */
5160 if (peer->routeadv)
5161 peer->v_routeadv = peer->routeadv;
5162 else
5163 peer->v_routeadv = (peer->sort == BGP_PEER_IBGP)
5164 ? BGP_DEFAULT_IBGP_ROUTEADV
5165 : BGP_DEFAULT_EBGP_ROUTEADV;
5166
5167 /* Check if handling a regular peer. */
5168 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
5169 /* Update peer route announcements. */
5170 update_group_adjust_peer_afs(peer);
5171 if (peer->status == Established)
5172 bgp_announce_route_all(peer);
5173
5174 /* Skip peer-group mechanics for regular peers. */
5175 return 0;
5176 }
5177
5178 /*
5179 * Remove flag and configuration from all peer-group members, unless
5180 * they are explicitely overriding peer-group configuration.
5181 */
5182 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5183 /* Skip peers with overridden configuration. */
5184 if (CHECK_FLAG(member->flags_override, PEER_FLAG_ROUTEADV))
5185 continue;
5186
5187 /* Remove flag and configuration on peer-group member. */
5188 UNSET_FLAG(member->flags, PEER_FLAG_ROUTEADV);
5189 member->routeadv = 0;
5190 member->v_routeadv = (member->sort == BGP_PEER_IBGP)
5191 ? BGP_DEFAULT_IBGP_ROUTEADV
5192 : BGP_DEFAULT_EBGP_ROUTEADV;
5193
5194 /* Update peer route announcements. */
5195 update_group_adjust_peer_afs(member);
5196 if (member->status == Established)
5197 bgp_announce_route_all(member);
5198 }
5199
5200 return 0;
5201 }
5202
5203 /* neighbor interface */
5204 void peer_interface_set(struct peer *peer, const char *str)
5205 {
5206 XFREE(MTYPE_BGP_PEER_IFNAME, peer->ifname);
5207 peer->ifname = XSTRDUP(MTYPE_BGP_PEER_IFNAME, str);
5208 }
5209
5210 void peer_interface_unset(struct peer *peer)
5211 {
5212 XFREE(MTYPE_BGP_PEER_IFNAME, peer->ifname);
5213 }
5214
5215 /* Allow-as in. */
5216 int peer_allowas_in_set(struct peer *peer, afi_t afi, safi_t safi,
5217 int allow_num, int origin)
5218 {
5219 struct peer *member;
5220 struct listnode *node, *nnode;
5221
5222 if (!origin && (allow_num < 1 || allow_num > 10))
5223 return BGP_ERR_INVALID_VALUE;
5224
5225 /* Set flag and configuration on peer. */
5226 peer_af_flag_set(peer, afi, safi, PEER_FLAG_ALLOWAS_IN);
5227 if (origin) {
5228 if (peer->allowas_in[afi][safi] != 0
5229 || !CHECK_FLAG(peer->af_flags[afi][safi],
5230 PEER_FLAG_ALLOWAS_IN_ORIGIN)) {
5231 peer_af_flag_set(peer, afi, safi,
5232 PEER_FLAG_ALLOWAS_IN_ORIGIN);
5233 peer->allowas_in[afi][safi] = 0;
5234 peer_on_policy_change(peer, afi, safi, 0);
5235 }
5236 } else {
5237 if (peer->allowas_in[afi][safi] != allow_num
5238 || CHECK_FLAG(peer->af_flags[afi][safi],
5239 PEER_FLAG_ALLOWAS_IN_ORIGIN)) {
5240
5241 peer_af_flag_unset(peer, afi, safi,
5242 PEER_FLAG_ALLOWAS_IN_ORIGIN);
5243 peer->allowas_in[afi][safi] = allow_num;
5244 peer_on_policy_change(peer, afi, safi, 0);
5245 }
5246 }
5247
5248 /* Skip peer-group mechanics for regular peers. */
5249 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP))
5250 return 0;
5251
5252 /*
5253 * Set flag and configuration on all peer-group members, unless
5254 * they are explicitely overriding peer-group configuration.
5255 */
5256 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5257 /* Skip peers with overridden configuration. */
5258 if (CHECK_FLAG(member->af_flags_override[afi][safi],
5259 PEER_FLAG_ALLOWAS_IN))
5260 continue;
5261
5262 /* Set flag and configuration on peer-group member. */
5263 SET_FLAG(member->af_flags[afi][safi], PEER_FLAG_ALLOWAS_IN);
5264 if (origin) {
5265 if (member->allowas_in[afi][safi] != 0
5266 || !CHECK_FLAG(member->af_flags[afi][safi],
5267 PEER_FLAG_ALLOWAS_IN_ORIGIN)) {
5268 SET_FLAG(member->af_flags[afi][safi],
5269 PEER_FLAG_ALLOWAS_IN_ORIGIN);
5270 member->allowas_in[afi][safi] = 0;
5271 peer_on_policy_change(peer, afi, safi, 0);
5272 }
5273 } else {
5274 if (member->allowas_in[afi][safi] != allow_num
5275 || CHECK_FLAG(member->af_flags[afi][safi],
5276 PEER_FLAG_ALLOWAS_IN_ORIGIN)) {
5277 UNSET_FLAG(member->af_flags[afi][safi],
5278 PEER_FLAG_ALLOWAS_IN_ORIGIN);
5279 member->allowas_in[afi][safi] = allow_num;
5280 peer_on_policy_change(peer, afi, safi, 0);
5281 }
5282 }
5283 }
5284
5285 return 0;
5286 }
5287
5288 int peer_allowas_in_unset(struct peer *peer, afi_t afi, safi_t safi)
5289 {
5290 struct peer *member;
5291 struct listnode *node, *nnode;
5292
5293 /* Skip peer if flag is already disabled. */
5294 if (!CHECK_FLAG(peer->af_flags[afi][safi], PEER_FLAG_ALLOWAS_IN))
5295 return 0;
5296
5297 /* Inherit configuration from peer-group if peer is member. */
5298 if (peer_group_active(peer)) {
5299 peer_af_flag_inherit(peer, afi, safi, PEER_FLAG_ALLOWAS_IN);
5300 peer_af_flag_inherit(peer, afi, safi,
5301 PEER_FLAG_ALLOWAS_IN_ORIGIN);
5302 PEER_ATTR_INHERIT(peer, peer->group, allowas_in[afi][safi]);
5303 peer_on_policy_change(peer, afi, safi, 0);
5304
5305 return 0;
5306 }
5307
5308 /* Remove flag and configuration from peer. */
5309 peer_af_flag_unset(peer, afi, safi, PEER_FLAG_ALLOWAS_IN);
5310 peer_af_flag_unset(peer, afi, safi, PEER_FLAG_ALLOWAS_IN_ORIGIN);
5311 peer->allowas_in[afi][safi] = 0;
5312 peer_on_policy_change(peer, afi, safi, 0);
5313
5314 /* Skip peer-group mechanics if handling a regular peer. */
5315 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP))
5316 return 0;
5317
5318 /*
5319 * Remove flags and configuration from all peer-group members, unless
5320 * they are explicitely overriding peer-group configuration.
5321 */
5322 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5323 /* Skip peers with overridden configuration. */
5324 if (CHECK_FLAG(member->af_flags_override[afi][safi],
5325 PEER_FLAG_ALLOWAS_IN))
5326 continue;
5327
5328 /* Skip peers where flag is already disabled. */
5329 if (!CHECK_FLAG(member->af_flags[afi][safi],
5330 PEER_FLAG_ALLOWAS_IN))
5331 continue;
5332
5333 /* Remove flags and configuration on peer-group member. */
5334 UNSET_FLAG(member->af_flags[afi][safi], PEER_FLAG_ALLOWAS_IN);
5335 UNSET_FLAG(member->af_flags[afi][safi],
5336 PEER_FLAG_ALLOWAS_IN_ORIGIN);
5337 member->allowas_in[afi][safi] = 0;
5338 peer_on_policy_change(member, afi, safi, 0);
5339 }
5340
5341 return 0;
5342 }
5343
5344 int peer_local_as_set(struct peer *peer, as_t as, int no_prepend,
5345 int replace_as)
5346 {
5347 bool old_no_prepend, old_replace_as;
5348 struct bgp *bgp = peer->bgp;
5349 struct peer *member;
5350 struct listnode *node, *nnode;
5351 bgp_peer_sort_t ptype = peer_sort(peer);
5352
5353 if (ptype != BGP_PEER_EBGP && ptype != BGP_PEER_INTERNAL)
5354 return BGP_ERR_LOCAL_AS_ALLOWED_ONLY_FOR_EBGP;
5355
5356 if (bgp->as == as)
5357 return BGP_ERR_CANNOT_HAVE_LOCAL_AS_SAME_AS;
5358
5359 if (peer->as == as)
5360 return BGP_ERR_CANNOT_HAVE_LOCAL_AS_SAME_AS_REMOTE_AS;
5361
5362 /* Save previous flag states. */
5363 old_no_prepend =
5364 !!CHECK_FLAG(peer->flags, PEER_FLAG_LOCAL_AS_NO_PREPEND);
5365 old_replace_as =
5366 !!CHECK_FLAG(peer->flags, PEER_FLAG_LOCAL_AS_REPLACE_AS);
5367
5368 /* Set flag and configuration on peer. */
5369 peer_flag_set(peer, PEER_FLAG_LOCAL_AS);
5370 peer_flag_modify(peer, PEER_FLAG_LOCAL_AS_NO_PREPEND, no_prepend);
5371 peer_flag_modify(peer, PEER_FLAG_LOCAL_AS_REPLACE_AS, replace_as);
5372
5373 if (peer->change_local_as == as && old_no_prepend == no_prepend
5374 && old_replace_as == replace_as)
5375 return 0;
5376 peer->change_local_as = as;
5377
5378 /* Check if handling a regular peer. */
5379 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
5380 /* Send notification or reset peer depending on state. */
5381 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status)) {
5382 peer->last_reset = PEER_DOWN_LOCAL_AS_CHANGE;
5383 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
5384 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
5385 } else
5386 bgp_session_reset(peer);
5387
5388 /* Skip peer-group mechanics for regular peers. */
5389 return 0;
5390 }
5391
5392 /*
5393 * Set flag and configuration on all peer-group members, unless they are
5394 * explicitely overriding peer-group configuration.
5395 */
5396 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5397 /* Skip peers with overridden configuration. */
5398 if (CHECK_FLAG(member->flags_override, PEER_FLAG_LOCAL_AS))
5399 continue;
5400
5401 /* Skip peers with the same configuration. */
5402 old_no_prepend = CHECK_FLAG(member->flags,
5403 PEER_FLAG_LOCAL_AS_NO_PREPEND);
5404 old_replace_as = CHECK_FLAG(member->flags,
5405 PEER_FLAG_LOCAL_AS_REPLACE_AS);
5406 if (member->change_local_as == as
5407 && CHECK_FLAG(member->flags, PEER_FLAG_LOCAL_AS)
5408 && old_no_prepend == no_prepend
5409 && old_replace_as == replace_as)
5410 continue;
5411
5412 /* Set flag and configuration on peer-group member. */
5413 SET_FLAG(member->flags, PEER_FLAG_LOCAL_AS);
5414 COND_FLAG(member->flags, PEER_FLAG_LOCAL_AS_NO_PREPEND,
5415 no_prepend);
5416 COND_FLAG(member->flags, PEER_FLAG_LOCAL_AS_REPLACE_AS,
5417 replace_as);
5418 member->change_local_as = as;
5419
5420 /* Send notification or stop peer depending on state. */
5421 if (BGP_IS_VALID_STATE_FOR_NOTIF(member->status)) {
5422 member->last_reset = PEER_DOWN_LOCAL_AS_CHANGE;
5423 bgp_notify_send(member, BGP_NOTIFY_CEASE,
5424 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
5425 } else
5426 BGP_EVENT_ADD(member, BGP_Stop);
5427 }
5428
5429 return 0;
5430 }
5431
5432 int peer_local_as_unset(struct peer *peer)
5433 {
5434 struct peer *member;
5435 struct listnode *node, *nnode;
5436
5437 if (!CHECK_FLAG(peer->flags, PEER_FLAG_LOCAL_AS))
5438 return 0;
5439
5440 /* Inherit configuration from peer-group if peer is member. */
5441 if (peer_group_active(peer)) {
5442 peer_flag_inherit(peer, PEER_FLAG_LOCAL_AS);
5443 peer_flag_inherit(peer, PEER_FLAG_LOCAL_AS_NO_PREPEND);
5444 peer_flag_inherit(peer, PEER_FLAG_LOCAL_AS_REPLACE_AS);
5445 PEER_ATTR_INHERIT(peer, peer->group, change_local_as);
5446 } else {
5447 /* Otherwise remove flag and configuration from peer. */
5448 peer_flag_unset(peer, PEER_FLAG_LOCAL_AS);
5449 peer_flag_unset(peer, PEER_FLAG_LOCAL_AS_NO_PREPEND);
5450 peer_flag_unset(peer, PEER_FLAG_LOCAL_AS_REPLACE_AS);
5451 peer->change_local_as = 0;
5452 }
5453
5454 /* Check if handling a regular peer. */
5455 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
5456 /* Send notification or stop peer depending on state. */
5457 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status)) {
5458 peer->last_reset = PEER_DOWN_LOCAL_AS_CHANGE;
5459 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
5460 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
5461 } else
5462 BGP_EVENT_ADD(peer, BGP_Stop);
5463
5464 /* Skip peer-group mechanics for regular peers. */
5465 return 0;
5466 }
5467
5468 /*
5469 * Remove flag and configuration from all peer-group members, unless
5470 * they are explicitely overriding peer-group configuration.
5471 */
5472 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5473 /* Skip peers with overridden configuration. */
5474 if (CHECK_FLAG(member->flags_override, PEER_FLAG_LOCAL_AS))
5475 continue;
5476
5477 /* Remove flag and configuration on peer-group member. */
5478 UNSET_FLAG(member->flags, PEER_FLAG_LOCAL_AS);
5479 UNSET_FLAG(member->flags, PEER_FLAG_LOCAL_AS_NO_PREPEND);
5480 UNSET_FLAG(member->flags, PEER_FLAG_LOCAL_AS_REPLACE_AS);
5481 member->change_local_as = 0;
5482
5483 /* Send notification or stop peer depending on state. */
5484 if (BGP_IS_VALID_STATE_FOR_NOTIF(member->status)) {
5485 member->last_reset = PEER_DOWN_LOCAL_AS_CHANGE;
5486 bgp_notify_send(member, BGP_NOTIFY_CEASE,
5487 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
5488 } else
5489 bgp_session_reset(member);
5490 }
5491
5492 return 0;
5493 }
5494
5495 /* Set password for authenticating with the peer. */
5496 int peer_password_set(struct peer *peer, const char *password)
5497 {
5498 struct peer *member;
5499 struct listnode *node, *nnode;
5500 int len = password ? strlen(password) : 0;
5501 int ret = BGP_SUCCESS;
5502
5503 if ((len < PEER_PASSWORD_MINLEN) || (len > PEER_PASSWORD_MAXLEN))
5504 return BGP_ERR_INVALID_VALUE;
5505
5506 /* Set flag and configuration on peer. */
5507 peer_flag_set(peer, PEER_FLAG_PASSWORD);
5508 if (peer->password && strcmp(peer->password, password) == 0)
5509 return 0;
5510 XFREE(MTYPE_PEER_PASSWORD, peer->password);
5511 peer->password = XSTRDUP(MTYPE_PEER_PASSWORD, password);
5512
5513 /* Check if handling a regular peer. */
5514 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
5515 /* Send notification or reset peer depending on state. */
5516 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status))
5517 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
5518 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
5519 else
5520 bgp_session_reset(peer);
5521
5522 /*
5523 * Attempt to install password on socket and skip peer-group
5524 * mechanics.
5525 */
5526 if (BGP_PEER_SU_UNSPEC(peer))
5527 return BGP_SUCCESS;
5528 return (bgp_md5_set(peer) >= 0) ? BGP_SUCCESS
5529 : BGP_ERR_TCPSIG_FAILED;
5530 }
5531
5532 /*
5533 * Set flag and configuration on all peer-group members, unless they are
5534 * explicitely overriding peer-group configuration.
5535 */
5536 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5537 /* Skip peers with overridden configuration. */
5538 if (CHECK_FLAG(member->flags_override, PEER_FLAG_PASSWORD))
5539 continue;
5540
5541 /* Skip peers with the same password. */
5542 if (member->password && strcmp(member->password, password) == 0)
5543 continue;
5544
5545 /* Set flag and configuration on peer-group member. */
5546 SET_FLAG(member->flags, PEER_FLAG_PASSWORD);
5547 if (member->password)
5548 XFREE(MTYPE_PEER_PASSWORD, member->password);
5549 member->password = XSTRDUP(MTYPE_PEER_PASSWORD, password);
5550
5551 /* Send notification or reset peer depending on state. */
5552 if (BGP_IS_VALID_STATE_FOR_NOTIF(member->status))
5553 bgp_notify_send(member, BGP_NOTIFY_CEASE,
5554 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
5555 else
5556 bgp_session_reset(member);
5557
5558 /* Attempt to install password on socket. */
5559 if (!BGP_PEER_SU_UNSPEC(member) && bgp_md5_set(member) < 0)
5560 ret = BGP_ERR_TCPSIG_FAILED;
5561 }
5562
5563 /* Set flag and configuration on all peer-group listen ranges */
5564 struct listnode *ln;
5565 struct prefix *lr;
5566
5567 for (ALL_LIST_ELEMENTS_RO(peer->group->listen_range[AFI_IP], ln, lr))
5568 bgp_md5_set_prefix(lr, password);
5569 for (ALL_LIST_ELEMENTS_RO(peer->group->listen_range[AFI_IP6], ln, lr))
5570 bgp_md5_set_prefix(lr, password);
5571
5572 return ret;
5573 }
5574
5575 int peer_password_unset(struct peer *peer)
5576 {
5577 struct peer *member;
5578 struct listnode *node, *nnode;
5579
5580 if (!CHECK_FLAG(peer->flags, PEER_FLAG_PASSWORD))
5581 return 0;
5582
5583 /* Inherit configuration from peer-group if peer is member. */
5584 if (peer_group_active(peer)) {
5585 peer_flag_inherit(peer, PEER_FLAG_PASSWORD);
5586 PEER_STR_ATTR_INHERIT(peer, peer->group, password,
5587 MTYPE_PEER_PASSWORD);
5588 } else {
5589 /* Otherwise remove flag and configuration from peer. */
5590 peer_flag_unset(peer, PEER_FLAG_PASSWORD);
5591 XFREE(MTYPE_PEER_PASSWORD, peer->password);
5592 }
5593
5594 /* Check if handling a regular peer. */
5595 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
5596 /* Send notification or reset peer depending on state. */
5597 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status))
5598 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
5599 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
5600 else
5601 bgp_session_reset(peer);
5602
5603 /* Attempt to uninstall password on socket. */
5604 if (!BGP_PEER_SU_UNSPEC(peer))
5605 bgp_md5_unset(peer);
5606
5607 /* Skip peer-group mechanics for regular peers. */
5608 return 0;
5609 }
5610
5611 /*
5612 * Remove flag and configuration from all peer-group members, unless
5613 * they are explicitely overriding peer-group configuration.
5614 */
5615 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5616 /* Skip peers with overridden configuration. */
5617 if (CHECK_FLAG(member->flags_override, PEER_FLAG_PASSWORD))
5618 continue;
5619
5620 /* Remove flag and configuration on peer-group member. */
5621 UNSET_FLAG(member->flags, PEER_FLAG_PASSWORD);
5622 XFREE(MTYPE_PEER_PASSWORD, member->password);
5623
5624 /* Send notification or reset peer depending on state. */
5625 if (BGP_IS_VALID_STATE_FOR_NOTIF(member->status))
5626 bgp_notify_send(member, BGP_NOTIFY_CEASE,
5627 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
5628 else
5629 bgp_session_reset(member);
5630
5631 /* Attempt to uninstall password on socket. */
5632 if (!BGP_PEER_SU_UNSPEC(member))
5633 bgp_md5_unset(member);
5634 }
5635
5636 /* Set flag and configuration on all peer-group listen ranges */
5637 struct listnode *ln;
5638 struct prefix *lr;
5639
5640 for (ALL_LIST_ELEMENTS_RO(peer->group->listen_range[AFI_IP], ln, lr))
5641 bgp_md5_unset_prefix(lr);
5642 for (ALL_LIST_ELEMENTS_RO(peer->group->listen_range[AFI_IP6], ln, lr))
5643 bgp_md5_unset_prefix(lr);
5644
5645 return 0;
5646 }
5647
5648
5649 /* Set distribute list to the peer. */
5650 int peer_distribute_set(struct peer *peer, afi_t afi, safi_t safi, int direct,
5651 const char *name)
5652 {
5653 struct peer *member;
5654 struct bgp_filter *filter;
5655 struct listnode *node, *nnode;
5656
5657 if (direct != FILTER_IN && direct != FILTER_OUT)
5658 return BGP_ERR_INVALID_VALUE;
5659
5660 /* Set configuration on peer. */
5661 filter = &peer->filter[afi][safi];
5662 if (filter->plist[direct].name)
5663 return BGP_ERR_PEER_FILTER_CONFLICT;
5664 if (filter->dlist[direct].name)
5665 XFREE(MTYPE_BGP_FILTER_NAME, filter->dlist[direct].name);
5666 filter->dlist[direct].name = XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
5667 filter->dlist[direct].alist = access_list_lookup(afi, name);
5668
5669 /* Check if handling a regular peer. */
5670 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
5671 /* Set override-flag and process peer route updates. */
5672 SET_FLAG(peer->filter_override[afi][safi][direct],
5673 PEER_FT_DISTRIBUTE_LIST);
5674 peer_on_policy_change(peer, afi, safi,
5675 (direct == FILTER_OUT) ? 1 : 0);
5676
5677 /* Skip peer-group mechanics for regular peers. */
5678 return 0;
5679 }
5680
5681 /*
5682 * Set configuration on all peer-group members, un less they are
5683 * explicitely overriding peer-group configuration.
5684 */
5685 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5686 /* Skip peers with overridden configuration. */
5687 if (CHECK_FLAG(member->filter_override[afi][safi][direct],
5688 PEER_FT_DISTRIBUTE_LIST))
5689 continue;
5690
5691 /* Set configuration on peer-group member. */
5692 filter = &member->filter[afi][safi];
5693 if (filter->dlist[direct].name)
5694 XFREE(MTYPE_BGP_FILTER_NAME,
5695 filter->dlist[direct].name);
5696 filter->dlist[direct].name =
5697 XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
5698 filter->dlist[direct].alist = access_list_lookup(afi, name);
5699
5700 /* Process peer route updates. */
5701 peer_on_policy_change(member, afi, safi,
5702 (direct == FILTER_OUT) ? 1 : 0);
5703 }
5704
5705 return 0;
5706 }
5707
5708 int peer_distribute_unset(struct peer *peer, afi_t afi, safi_t safi, int direct)
5709 {
5710 struct peer *member;
5711 struct bgp_filter *filter;
5712 struct listnode *node, *nnode;
5713
5714 if (direct != FILTER_IN && direct != FILTER_OUT)
5715 return BGP_ERR_INVALID_VALUE;
5716
5717 /* Unset override-flag unconditionally. */
5718 UNSET_FLAG(peer->filter_override[afi][safi][direct],
5719 PEER_FT_DISTRIBUTE_LIST);
5720
5721 /* Inherit configuration from peer-group if peer is member. */
5722 if (peer_group_active(peer)) {
5723 PEER_STR_ATTR_INHERIT(peer, peer->group,
5724 filter[afi][safi].dlist[direct].name,
5725 MTYPE_BGP_FILTER_NAME);
5726 PEER_ATTR_INHERIT(peer, peer->group,
5727 filter[afi][safi].dlist[direct].alist);
5728 } else {
5729 /* Otherwise remove configuration from peer. */
5730 filter = &peer->filter[afi][safi];
5731 if (filter->dlist[direct].name)
5732 XFREE(MTYPE_BGP_FILTER_NAME,
5733 filter->dlist[direct].name);
5734 filter->dlist[direct].name = NULL;
5735 filter->dlist[direct].alist = NULL;
5736 }
5737
5738 /* Check if handling a regular peer. */
5739 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
5740 /* Process peer route updates. */
5741 peer_on_policy_change(peer, afi, safi,
5742 (direct == FILTER_OUT) ? 1 : 0);
5743
5744 /* Skip peer-group mechanics for regular peers. */
5745 return 0;
5746 }
5747
5748 /*
5749 * Remove configuration on all peer-group members, unless they are
5750 * explicitely overriding peer-group configuration.
5751 */
5752 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5753 /* Skip peers with overridden configuration. */
5754 if (CHECK_FLAG(member->filter_override[afi][safi][direct],
5755 PEER_FT_DISTRIBUTE_LIST))
5756 continue;
5757
5758 /* Remove configuration on peer-group member. */
5759 filter = &member->filter[afi][safi];
5760 if (filter->dlist[direct].name)
5761 XFREE(MTYPE_BGP_FILTER_NAME,
5762 filter->dlist[direct].name);
5763 filter->dlist[direct].name = NULL;
5764 filter->dlist[direct].alist = NULL;
5765
5766 /* Process peer route updates. */
5767 peer_on_policy_change(member, afi, safi,
5768 (direct == FILTER_OUT) ? 1 : 0);
5769 }
5770
5771 return 0;
5772 }
5773
5774 /* Update distribute list. */
5775 static void peer_distribute_update(struct access_list *access)
5776 {
5777 afi_t afi;
5778 safi_t safi;
5779 int direct;
5780 struct listnode *mnode, *mnnode;
5781 struct listnode *node, *nnode;
5782 struct bgp *bgp;
5783 struct peer *peer;
5784 struct peer_group *group;
5785 struct bgp_filter *filter;
5786
5787 for (ALL_LIST_ELEMENTS(bm->bgp, mnode, mnnode, bgp)) {
5788 if (access->name)
5789 update_group_policy_update(bgp, BGP_POLICY_FILTER_LIST,
5790 access->name, 0, 0);
5791 for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) {
5792 FOREACH_AFI_SAFI (afi, safi) {
5793 filter = &peer->filter[afi][safi];
5794
5795 for (direct = FILTER_IN; direct < FILTER_MAX;
5796 direct++) {
5797 if (filter->dlist[direct].name)
5798 filter->dlist[direct]
5799 .alist = access_list_lookup(
5800 afi,
5801 filter->dlist[direct]
5802 .name);
5803 else
5804 filter->dlist[direct].alist =
5805 NULL;
5806 }
5807 }
5808 }
5809 for (ALL_LIST_ELEMENTS(bgp->group, node, nnode, group)) {
5810 FOREACH_AFI_SAFI (afi, safi) {
5811 filter = &group->conf->filter[afi][safi];
5812
5813 for (direct = FILTER_IN; direct < FILTER_MAX;
5814 direct++) {
5815 if (filter->dlist[direct].name)
5816 filter->dlist[direct]
5817 .alist = access_list_lookup(
5818 afi,
5819 filter->dlist[direct]
5820 .name);
5821 else
5822 filter->dlist[direct].alist =
5823 NULL;
5824 }
5825 }
5826 }
5827 #ifdef ENABLE_BGP_VNC
5828 vnc_prefix_list_update(bgp);
5829 #endif
5830 }
5831 }
5832
5833 /* Set prefix list to the peer. */
5834 int peer_prefix_list_set(struct peer *peer, afi_t afi, safi_t safi, int direct,
5835 const char *name)
5836 {
5837 struct peer *member;
5838 struct bgp_filter *filter;
5839 struct listnode *node, *nnode;
5840
5841 if (direct != FILTER_IN && direct != FILTER_OUT)
5842 return BGP_ERR_INVALID_VALUE;
5843
5844 /* Set configuration on peer. */
5845 filter = &peer->filter[afi][safi];
5846 if (filter->dlist[direct].name)
5847 return BGP_ERR_PEER_FILTER_CONFLICT;
5848 if (filter->plist[direct].name)
5849 XFREE(MTYPE_BGP_FILTER_NAME, filter->plist[direct].name);
5850 filter->plist[direct].name = XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
5851 filter->plist[direct].plist = prefix_list_lookup(afi, name);
5852
5853 /* Check if handling a regular peer. */
5854 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
5855 /* Set override-flag and process peer route updates. */
5856 SET_FLAG(peer->filter_override[afi][safi][direct],
5857 PEER_FT_PREFIX_LIST);
5858 peer_on_policy_change(peer, afi, safi,
5859 (direct == FILTER_OUT) ? 1 : 0);
5860
5861 /* Skip peer-group mechanics for regular peers. */
5862 return 0;
5863 }
5864
5865 /*
5866 * Set configuration on all peer-group members, unless they are
5867 * explicitely overriding peer-group configuration.
5868 */
5869 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5870 /* Skip peers with overridden configuration. */
5871 if (CHECK_FLAG(member->filter_override[afi][safi][direct],
5872 PEER_FT_PREFIX_LIST))
5873 continue;
5874
5875 /* Set configuration on peer-group member. */
5876 filter = &member->filter[afi][safi];
5877 if (filter->plist[direct].name)
5878 XFREE(MTYPE_BGP_FILTER_NAME,
5879 filter->plist[direct].name);
5880 filter->plist[direct].name =
5881 XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
5882 filter->plist[direct].plist = prefix_list_lookup(afi, name);
5883
5884 /* Process peer route updates. */
5885 peer_on_policy_change(member, afi, safi,
5886 (direct == FILTER_OUT) ? 1 : 0);
5887 }
5888
5889 return 0;
5890 }
5891
5892 int peer_prefix_list_unset(struct peer *peer, afi_t afi, safi_t safi,
5893 int direct)
5894 {
5895 struct peer *member;
5896 struct bgp_filter *filter;
5897 struct listnode *node, *nnode;
5898
5899 if (direct != FILTER_IN && direct != FILTER_OUT)
5900 return BGP_ERR_INVALID_VALUE;
5901
5902 /* Unset override-flag unconditionally. */
5903 UNSET_FLAG(peer->filter_override[afi][safi][direct],
5904 PEER_FT_PREFIX_LIST);
5905
5906 /* Inherit configuration from peer-group if peer is member. */
5907 if (peer_group_active(peer)) {
5908 PEER_STR_ATTR_INHERIT(peer, peer->group,
5909 filter[afi][safi].plist[direct].name,
5910 MTYPE_BGP_FILTER_NAME);
5911 PEER_ATTR_INHERIT(peer, peer->group,
5912 filter[afi][safi].plist[direct].plist);
5913 } else {
5914 /* Otherwise remove configuration from peer. */
5915 filter = &peer->filter[afi][safi];
5916 if (filter->plist[direct].name)
5917 XFREE(MTYPE_BGP_FILTER_NAME,
5918 filter->plist[direct].name);
5919 filter->plist[direct].name = NULL;
5920 filter->plist[direct].plist = NULL;
5921 }
5922
5923 /* Check if handling a regular peer. */
5924 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
5925 /* Process peer route updates. */
5926 peer_on_policy_change(peer, afi, safi,
5927 (direct == FILTER_OUT) ? 1 : 0);
5928
5929 /* Skip peer-group mechanics for regular peers. */
5930 return 0;
5931 }
5932
5933 /*
5934 * Remove configuration on all peer-group members, unless they are
5935 * explicitely overriding peer-group configuration.
5936 */
5937 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5938 /* Skip peers with overridden configuration. */
5939 if (CHECK_FLAG(member->filter_override[afi][safi][direct],
5940 PEER_FT_PREFIX_LIST))
5941 continue;
5942
5943 /* Remove configuration on peer-group member. */
5944 filter = &member->filter[afi][safi];
5945 if (filter->plist[direct].name)
5946 XFREE(MTYPE_BGP_FILTER_NAME,
5947 filter->plist[direct].name);
5948 filter->plist[direct].name = NULL;
5949 filter->plist[direct].plist = NULL;
5950
5951 /* Process peer route updates. */
5952 peer_on_policy_change(member, afi, safi,
5953 (direct == FILTER_OUT) ? 1 : 0);
5954 }
5955
5956 return 0;
5957 }
5958
5959 /* Update prefix-list list. */
5960 static void peer_prefix_list_update(struct prefix_list *plist)
5961 {
5962 struct listnode *mnode, *mnnode;
5963 struct listnode *node, *nnode;
5964 struct bgp *bgp;
5965 struct peer *peer;
5966 struct peer_group *group;
5967 struct bgp_filter *filter;
5968 afi_t afi;
5969 safi_t safi;
5970 int direct;
5971
5972 for (ALL_LIST_ELEMENTS(bm->bgp, mnode, mnnode, bgp)) {
5973
5974 /*
5975 * Update the prefix-list on update groups.
5976 */
5977 update_group_policy_update(
5978 bgp, BGP_POLICY_PREFIX_LIST,
5979 plist ? prefix_list_name(plist) : NULL, 0, 0);
5980
5981 for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) {
5982 FOREACH_AFI_SAFI (afi, safi) {
5983 filter = &peer->filter[afi][safi];
5984
5985 for (direct = FILTER_IN; direct < FILTER_MAX;
5986 direct++) {
5987 if (filter->plist[direct].name)
5988 filter->plist[direct]
5989 .plist = prefix_list_lookup(
5990 afi,
5991 filter->plist[direct]
5992 .name);
5993 else
5994 filter->plist[direct].plist =
5995 NULL;
5996 }
5997 }
5998 }
5999 for (ALL_LIST_ELEMENTS(bgp->group, node, nnode, group)) {
6000 FOREACH_AFI_SAFI (afi, safi) {
6001 filter = &group->conf->filter[afi][safi];
6002
6003 for (direct = FILTER_IN; direct < FILTER_MAX;
6004 direct++) {
6005 if (filter->plist[direct].name)
6006 filter->plist[direct]
6007 .plist = prefix_list_lookup(
6008 afi,
6009 filter->plist[direct]
6010 .name);
6011 else
6012 filter->plist[direct].plist =
6013 NULL;
6014 }
6015 }
6016 }
6017 }
6018 }
6019
6020 int peer_aslist_set(struct peer *peer, afi_t afi, safi_t safi, int direct,
6021 const char *name)
6022 {
6023 struct peer *member;
6024 struct bgp_filter *filter;
6025 struct listnode *node, *nnode;
6026
6027 if (direct != FILTER_IN && direct != FILTER_OUT)
6028 return BGP_ERR_INVALID_VALUE;
6029
6030 /* Set configuration on peer. */
6031 filter = &peer->filter[afi][safi];
6032 if (filter->aslist[direct].name)
6033 XFREE(MTYPE_BGP_FILTER_NAME, filter->aslist[direct].name);
6034 filter->aslist[direct].name = XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
6035 filter->aslist[direct].aslist = as_list_lookup(name);
6036
6037 /* Check if handling a regular peer. */
6038 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6039 /* Set override-flag and process peer route updates. */
6040 SET_FLAG(peer->filter_override[afi][safi][direct],
6041 PEER_FT_FILTER_LIST);
6042 peer_on_policy_change(peer, afi, safi,
6043 (direct == FILTER_OUT) ? 1 : 0);
6044
6045 /* Skip peer-group mechanics for regular peers. */
6046 return 0;
6047 }
6048
6049 /*
6050 * Set configuration on all peer-group members, unless they are
6051 * explicitely overriding peer-group configuration.
6052 */
6053 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
6054 /* Skip peers with overridden configuration. */
6055 if (CHECK_FLAG(member->filter_override[afi][safi][direct],
6056 PEER_FT_FILTER_LIST))
6057 continue;
6058
6059 /* Set configuration on peer-group member. */
6060 filter = &member->filter[afi][safi];
6061 if (filter->aslist[direct].name)
6062 XFREE(MTYPE_BGP_FILTER_NAME,
6063 filter->aslist[direct].name);
6064 filter->aslist[direct].name =
6065 XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
6066 filter->aslist[direct].aslist = as_list_lookup(name);
6067
6068 /* Process peer route updates. */
6069 peer_on_policy_change(member, afi, safi,
6070 (direct == FILTER_OUT) ? 1 : 0);
6071 }
6072
6073 return 0;
6074 }
6075
6076 int peer_aslist_unset(struct peer *peer, afi_t afi, safi_t safi, int direct)
6077 {
6078 struct peer *member;
6079 struct bgp_filter *filter;
6080 struct listnode *node, *nnode;
6081
6082 if (direct != FILTER_IN && direct != FILTER_OUT)
6083 return BGP_ERR_INVALID_VALUE;
6084
6085 /* Unset override-flag unconditionally. */
6086 UNSET_FLAG(peer->filter_override[afi][safi][direct],
6087 PEER_FT_FILTER_LIST);
6088
6089 /* Inherit configuration from peer-group if peer is member. */
6090 if (peer_group_active(peer)) {
6091 PEER_STR_ATTR_INHERIT(peer, peer->group,
6092 filter[afi][safi].aslist[direct].name,
6093 MTYPE_BGP_FILTER_NAME);
6094 PEER_ATTR_INHERIT(peer, peer->group,
6095 filter[afi][safi].aslist[direct].aslist);
6096 } else {
6097 /* Otherwise remove configuration from peer. */
6098 filter = &peer->filter[afi][safi];
6099 if (filter->aslist[direct].name)
6100 XFREE(MTYPE_BGP_FILTER_NAME,
6101 filter->aslist[direct].name);
6102 filter->aslist[direct].name = NULL;
6103 filter->aslist[direct].aslist = NULL;
6104 }
6105
6106 /* Check if handling a regular peer. */
6107 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6108 /* Process peer route updates. */
6109 peer_on_policy_change(peer, afi, safi,
6110 (direct == FILTER_OUT) ? 1 : 0);
6111
6112 /* Skip peer-group mechanics for regular peers. */
6113 return 0;
6114 }
6115
6116 /*
6117 * Remove configuration on all peer-group members, unless they are
6118 * explicitely overriding peer-group configuration.
6119 */
6120 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
6121 /* Skip peers with overridden configuration. */
6122 if (CHECK_FLAG(member->filter_override[afi][safi][direct],
6123 PEER_FT_FILTER_LIST))
6124 continue;
6125
6126 /* Remove configuration on peer-group member. */
6127 filter = &member->filter[afi][safi];
6128 if (filter->aslist[direct].name)
6129 XFREE(MTYPE_BGP_FILTER_NAME,
6130 filter->aslist[direct].name);
6131 filter->aslist[direct].name = NULL;
6132 filter->aslist[direct].aslist = NULL;
6133
6134 /* Process peer route updates. */
6135 peer_on_policy_change(member, afi, safi,
6136 (direct == FILTER_OUT) ? 1 : 0);
6137 }
6138
6139 return 0;
6140 }
6141
6142 static void peer_aslist_update(const char *aslist_name)
6143 {
6144 afi_t afi;
6145 safi_t safi;
6146 int direct;
6147 struct listnode *mnode, *mnnode;
6148 struct listnode *node, *nnode;
6149 struct bgp *bgp;
6150 struct peer *peer;
6151 struct peer_group *group;
6152 struct bgp_filter *filter;
6153
6154 for (ALL_LIST_ELEMENTS(bm->bgp, mnode, mnnode, bgp)) {
6155 update_group_policy_update(bgp, BGP_POLICY_FILTER_LIST,
6156 aslist_name, 0, 0);
6157
6158 for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) {
6159 FOREACH_AFI_SAFI (afi, safi) {
6160 filter = &peer->filter[afi][safi];
6161
6162 for (direct = FILTER_IN; direct < FILTER_MAX;
6163 direct++) {
6164 if (filter->aslist[direct].name)
6165 filter->aslist[direct]
6166 .aslist = as_list_lookup(
6167 filter->aslist[direct]
6168 .name);
6169 else
6170 filter->aslist[direct].aslist =
6171 NULL;
6172 }
6173 }
6174 }
6175 for (ALL_LIST_ELEMENTS(bgp->group, node, nnode, group)) {
6176 FOREACH_AFI_SAFI (afi, safi) {
6177 filter = &group->conf->filter[afi][safi];
6178
6179 for (direct = FILTER_IN; direct < FILTER_MAX;
6180 direct++) {
6181 if (filter->aslist[direct].name)
6182 filter->aslist[direct]
6183 .aslist = as_list_lookup(
6184 filter->aslist[direct]
6185 .name);
6186 else
6187 filter->aslist[direct].aslist =
6188 NULL;
6189 }
6190 }
6191 }
6192 }
6193 }
6194
6195 static void peer_aslist_add(char *aslist_name)
6196 {
6197 peer_aslist_update(aslist_name);
6198 route_map_notify_dependencies(aslist_name, RMAP_EVENT_ASLIST_ADDED);
6199 }
6200
6201 static void peer_aslist_del(const char *aslist_name)
6202 {
6203 peer_aslist_update(aslist_name);
6204 route_map_notify_dependencies(aslist_name, RMAP_EVENT_ASLIST_DELETED);
6205 }
6206
6207
6208 int peer_route_map_set(struct peer *peer, afi_t afi, safi_t safi, int direct,
6209 const char *name, struct route_map *route_map)
6210 {
6211 struct peer *member;
6212 struct bgp_filter *filter;
6213 struct listnode *node, *nnode;
6214
6215 if (direct != RMAP_IN && direct != RMAP_OUT)
6216 return BGP_ERR_INVALID_VALUE;
6217
6218 /* Set configuration on peer. */
6219 filter = &peer->filter[afi][safi];
6220 if (filter->map[direct].name) {
6221 /* If the neighbor is configured with the same route-map
6222 * again then, ignore the duplicate configuration.
6223 */
6224 if (strcmp(filter->map[direct].name, name) == 0)
6225 return 0;
6226
6227 XFREE(MTYPE_BGP_FILTER_NAME, filter->map[direct].name);
6228 }
6229 route_map_counter_decrement(filter->map[direct].map);
6230 filter->map[direct].name = XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
6231 filter->map[direct].map = route_map;
6232 route_map_counter_increment(route_map);
6233
6234 /* Check if handling a regular peer. */
6235 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6236 /* Set override-flag and process peer route updates. */
6237 SET_FLAG(peer->filter_override[afi][safi][direct],
6238 PEER_FT_ROUTE_MAP);
6239 peer_on_policy_change(peer, afi, safi,
6240 (direct == RMAP_OUT) ? 1 : 0);
6241
6242 /* Skip peer-group mechanics for regular peers. */
6243 return 0;
6244 }
6245
6246 /*
6247 * Set configuration on all peer-group members, unless they are
6248 * explicitely overriding peer-group configuration.
6249 */
6250 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
6251 /* Skip peers with overridden configuration. */
6252 if (CHECK_FLAG(member->filter_override[afi][safi][direct],
6253 PEER_FT_ROUTE_MAP))
6254 continue;
6255
6256 /* Set configuration on peer-group member. */
6257 filter = &member->filter[afi][safi];
6258 if (filter->map[direct].name)
6259 XFREE(MTYPE_BGP_FILTER_NAME, filter->map[direct].name);
6260 route_map_counter_decrement(filter->map[direct].map);
6261 filter->map[direct].name = XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
6262 filter->map[direct].map = route_map;
6263 route_map_counter_increment(route_map);
6264
6265 /* Process peer route updates. */
6266 peer_on_policy_change(member, afi, safi,
6267 (direct == RMAP_OUT) ? 1 : 0);
6268 }
6269 return 0;
6270 }
6271
6272 /* Unset route-map from the peer. */
6273 int peer_route_map_unset(struct peer *peer, afi_t afi, safi_t safi, int direct)
6274 {
6275 struct peer *member;
6276 struct bgp_filter *filter;
6277 struct listnode *node, *nnode;
6278
6279 if (direct != RMAP_IN && direct != RMAP_OUT)
6280 return BGP_ERR_INVALID_VALUE;
6281
6282 /* Unset override-flag unconditionally. */
6283 UNSET_FLAG(peer->filter_override[afi][safi][direct], PEER_FT_ROUTE_MAP);
6284
6285 /* Inherit configuration from peer-group if peer is member. */
6286 if (peer_group_active(peer)) {
6287 PEER_STR_ATTR_INHERIT(peer, peer->group,
6288 filter[afi][safi].map[direct].name,
6289 MTYPE_BGP_FILTER_NAME);
6290 PEER_ATTR_INHERIT(peer, peer->group,
6291 filter[afi][safi].map[direct].map);
6292 } else {
6293 /* Otherwise remove configuration from peer. */
6294 filter = &peer->filter[afi][safi];
6295 if (filter->map[direct].name)
6296 XFREE(MTYPE_BGP_FILTER_NAME, filter->map[direct].name);
6297 route_map_counter_decrement(filter->map[direct].map);
6298 filter->map[direct].name = NULL;
6299 filter->map[direct].map = NULL;
6300 }
6301
6302 /* Check if handling a regular peer. */
6303 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6304 /* Process peer route updates. */
6305 peer_on_policy_change(peer, afi, safi,
6306 (direct == RMAP_OUT) ? 1 : 0);
6307
6308 /* Skip peer-group mechanics for regular peers. */
6309 return 0;
6310 }
6311
6312 /*
6313 * Remove configuration on all peer-group members, unless they are
6314 * explicitely overriding peer-group configuration.
6315 */
6316 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
6317 /* Skip peers with overridden configuration. */
6318 if (CHECK_FLAG(member->filter_override[afi][safi][direct],
6319 PEER_FT_ROUTE_MAP))
6320 continue;
6321
6322 /* Remove configuration on peer-group member. */
6323 filter = &member->filter[afi][safi];
6324 if (filter->map[direct].name)
6325 XFREE(MTYPE_BGP_FILTER_NAME, filter->map[direct].name);
6326 route_map_counter_decrement(filter->map[direct].map);
6327 filter->map[direct].name = NULL;
6328 filter->map[direct].map = NULL;
6329
6330 /* Process peer route updates. */
6331 peer_on_policy_change(member, afi, safi,
6332 (direct == RMAP_OUT) ? 1 : 0);
6333 }
6334
6335 return 0;
6336 }
6337
6338 /* Set unsuppress-map to the peer. */
6339 int peer_unsuppress_map_set(struct peer *peer, afi_t afi, safi_t safi,
6340 const char *name, struct route_map *route_map)
6341 {
6342 struct peer *member;
6343 struct bgp_filter *filter;
6344 struct listnode *node, *nnode;
6345
6346 /* Set configuration on peer. */
6347 filter = &peer->filter[afi][safi];
6348 if (filter->usmap.name)
6349 XFREE(MTYPE_BGP_FILTER_NAME, filter->usmap.name);
6350 route_map_counter_decrement(filter->usmap.map);
6351 filter->usmap.name = XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
6352 filter->usmap.map = route_map;
6353 route_map_counter_increment(route_map);
6354
6355 /* Check if handling a regular peer. */
6356 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6357 /* Set override-flag and process peer route updates. */
6358 SET_FLAG(peer->filter_override[afi][safi][0],
6359 PEER_FT_UNSUPPRESS_MAP);
6360 peer_on_policy_change(peer, afi, safi, 1);
6361
6362 /* Skip peer-group mechanics for regular peers. */
6363 return 0;
6364 }
6365
6366 /*
6367 * Set configuration on all peer-group members, unless they are
6368 * explicitely overriding peer-group configuration.
6369 */
6370 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
6371 /* Skip peers with overridden configuration. */
6372 if (CHECK_FLAG(member->filter_override[afi][safi][0],
6373 PEER_FT_UNSUPPRESS_MAP))
6374 continue;
6375
6376 /* Set configuration on peer-group member. */
6377 filter = &member->filter[afi][safi];
6378 if (filter->usmap.name)
6379 XFREE(MTYPE_BGP_FILTER_NAME, filter->usmap.name);
6380 route_map_counter_decrement(filter->usmap.map);
6381 filter->usmap.name = XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
6382 filter->usmap.map = route_map;
6383 route_map_counter_increment(route_map);
6384
6385 /* Process peer route updates. */
6386 peer_on_policy_change(member, afi, safi, 1);
6387 }
6388
6389 return 0;
6390 }
6391
6392 /* Unset route-map from the peer. */
6393 int peer_unsuppress_map_unset(struct peer *peer, afi_t afi, safi_t safi)
6394 {
6395 struct peer *member;
6396 struct bgp_filter *filter;
6397 struct listnode *node, *nnode;
6398
6399 /* Unset override-flag unconditionally. */
6400 UNSET_FLAG(peer->filter_override[afi][safi][0], PEER_FT_UNSUPPRESS_MAP);
6401
6402 /* Inherit configuration from peer-group if peer is member. */
6403 if (peer_group_active(peer)) {
6404 PEER_STR_ATTR_INHERIT(peer, peer->group,
6405 filter[afi][safi].usmap.name,
6406 MTYPE_BGP_FILTER_NAME);
6407 PEER_ATTR_INHERIT(peer, peer->group,
6408 filter[afi][safi].usmap.map);
6409 } else {
6410 /* Otherwise remove configuration from peer. */
6411 filter = &peer->filter[afi][safi];
6412 if (filter->usmap.name)
6413 XFREE(MTYPE_BGP_FILTER_NAME, filter->usmap.name);
6414 route_map_counter_decrement(filter->usmap.map);
6415 filter->usmap.name = NULL;
6416 filter->usmap.map = NULL;
6417 }
6418
6419 /* Check if handling a regular peer. */
6420 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6421 /* Process peer route updates. */
6422 peer_on_policy_change(peer, afi, safi, 1);
6423
6424 /* Skip peer-group mechanics for regular peers. */
6425 return 0;
6426 }
6427
6428 /*
6429 * Remove configuration on all peer-group members, unless they are
6430 * explicitely overriding peer-group configuration.
6431 */
6432 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
6433 /* Skip peers with overridden configuration. */
6434 if (CHECK_FLAG(member->filter_override[afi][safi][0],
6435 PEER_FT_UNSUPPRESS_MAP))
6436 continue;
6437
6438 /* Remove configuration on peer-group member. */
6439 filter = &member->filter[afi][safi];
6440 if (filter->usmap.name)
6441 XFREE(MTYPE_BGP_FILTER_NAME, filter->usmap.name);
6442 route_map_counter_decrement(filter->usmap.map);
6443 filter->usmap.name = NULL;
6444 filter->usmap.map = NULL;
6445
6446 /* Process peer route updates. */
6447 peer_on_policy_change(member, afi, safi, 1);
6448 }
6449
6450 return 0;
6451 }
6452
6453 int peer_maximum_prefix_set(struct peer *peer, afi_t afi, safi_t safi,
6454 uint32_t max, uint8_t threshold, int warning,
6455 uint16_t restart, bool force)
6456 {
6457 struct peer *member;
6458 struct listnode *node, *nnode;
6459
6460 /* Set flags and configuration on peer. */
6461 peer_af_flag_set(peer, afi, safi, PEER_FLAG_MAX_PREFIX);
6462
6463 if (force)
6464 peer_af_flag_set(peer, afi, safi, PEER_FLAG_MAX_PREFIX_FORCE);
6465 else
6466 peer_af_flag_unset(peer, afi, safi, PEER_FLAG_MAX_PREFIX_FORCE);
6467
6468 if (warning)
6469 peer_af_flag_set(peer, afi, safi, PEER_FLAG_MAX_PREFIX_WARNING);
6470 else
6471 peer_af_flag_unset(peer, afi, safi,
6472 PEER_FLAG_MAX_PREFIX_WARNING);
6473
6474 peer->pmax[afi][safi] = max;
6475 peer->pmax_threshold[afi][safi] = threshold;
6476 peer->pmax_restart[afi][safi] = restart;
6477
6478 /* Check if handling a regular peer. */
6479 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6480 /* Re-check if peer violates maximum-prefix. */
6481 if ((peer->status == Established) && (peer->afc[afi][safi]))
6482 bgp_maximum_prefix_overflow(peer, afi, safi, 1);
6483
6484 /* Skip peer-group mechanics for regular peers. */
6485 return 0;
6486 }
6487
6488 /*
6489 * Set flags and configuration on all peer-group members, unless they
6490 * are explicitely overriding peer-group configuration.
6491 */
6492 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
6493 /* Skip peers with overridden configuration. */
6494 if (CHECK_FLAG(member->af_flags_override[afi][safi],
6495 PEER_FLAG_MAX_PREFIX))
6496 continue;
6497
6498 /* Set flag and configuration on peer-group member. */
6499 member->pmax[afi][safi] = max;
6500 member->pmax_threshold[afi][safi] = threshold;
6501 member->pmax_restart[afi][safi] = restart;
6502
6503 if (force)
6504 SET_FLAG(member->af_flags[afi][safi],
6505 PEER_FLAG_MAX_PREFIX_FORCE);
6506 else
6507 UNSET_FLAG(member->af_flags[afi][safi],
6508 PEER_FLAG_MAX_PREFIX_FORCE);
6509
6510 if (warning)
6511 SET_FLAG(member->af_flags[afi][safi],
6512 PEER_FLAG_MAX_PREFIX_WARNING);
6513 else
6514 UNSET_FLAG(member->af_flags[afi][safi],
6515 PEER_FLAG_MAX_PREFIX_WARNING);
6516
6517 /* Re-check if peer violates maximum-prefix. */
6518 if ((member->status == Established) && (member->afc[afi][safi]))
6519 bgp_maximum_prefix_overflow(member, afi, safi, 1);
6520 }
6521
6522 return 0;
6523 }
6524
6525 int peer_maximum_prefix_unset(struct peer *peer, afi_t afi, safi_t safi)
6526 {
6527 /* Inherit configuration from peer-group if peer is member. */
6528 if (peer_group_active(peer)) {
6529 peer_af_flag_inherit(peer, afi, safi, PEER_FLAG_MAX_PREFIX);
6530 peer_af_flag_inherit(peer, afi, safi,
6531 PEER_FLAG_MAX_PREFIX_FORCE);
6532 peer_af_flag_inherit(peer, afi, safi,
6533 PEER_FLAG_MAX_PREFIX_WARNING);
6534 PEER_ATTR_INHERIT(peer, peer->group, pmax[afi][safi]);
6535 PEER_ATTR_INHERIT(peer, peer->group, pmax_threshold[afi][safi]);
6536 PEER_ATTR_INHERIT(peer, peer->group, pmax_restart[afi][safi]);
6537
6538 return 0;
6539 }
6540
6541 /* Remove flags and configuration from peer. */
6542 peer_af_flag_unset(peer, afi, safi, PEER_FLAG_MAX_PREFIX);
6543 peer_af_flag_unset(peer, afi, safi, PEER_FLAG_MAX_PREFIX_FORCE);
6544 peer_af_flag_unset(peer, afi, safi, PEER_FLAG_MAX_PREFIX_WARNING);
6545 peer->pmax[afi][safi] = 0;
6546 peer->pmax_threshold[afi][safi] = 0;
6547 peer->pmax_restart[afi][safi] = 0;
6548
6549 /*
6550 * Remove flags and configuration from all peer-group members, unless
6551 * they are explicitely overriding peer-group configuration.
6552 */
6553 if (CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6554 struct peer *member;
6555 struct listnode *node;
6556
6557 for (ALL_LIST_ELEMENTS_RO(peer->group->peer, node, member)) {
6558 /* Skip peers with overridden configuration. */
6559 if (CHECK_FLAG(member->af_flags_override[afi][safi],
6560 PEER_FLAG_MAX_PREFIX))
6561 continue;
6562
6563 /* Remove flag and configuration on peer-group member.
6564 */
6565 UNSET_FLAG(member->af_flags[afi][safi],
6566 PEER_FLAG_MAX_PREFIX);
6567 UNSET_FLAG(member->af_flags[afi][safi],
6568 PEER_FLAG_MAX_PREFIX_FORCE);
6569 UNSET_FLAG(member->af_flags[afi][safi],
6570 PEER_FLAG_MAX_PREFIX_WARNING);
6571 member->pmax[afi][safi] = 0;
6572 member->pmax_threshold[afi][safi] = 0;
6573 member->pmax_restart[afi][safi] = 0;
6574 }
6575 }
6576
6577 return 0;
6578 }
6579
6580 int is_ebgp_multihop_configured(struct peer *peer)
6581 {
6582 struct peer_group *group;
6583 struct listnode *node, *nnode;
6584 struct peer *peer1;
6585
6586 if (CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6587 group = peer->group;
6588 if ((peer_sort(peer) != BGP_PEER_IBGP)
6589 && (group->conf->ttl != BGP_DEFAULT_TTL))
6590 return 1;
6591
6592 for (ALL_LIST_ELEMENTS(group->peer, node, nnode, peer1)) {
6593 if ((peer_sort(peer1) != BGP_PEER_IBGP)
6594 && (peer1->ttl != BGP_DEFAULT_TTL))
6595 return 1;
6596 }
6597 } else {
6598 if ((peer_sort(peer) != BGP_PEER_IBGP)
6599 && (peer->ttl != BGP_DEFAULT_TTL))
6600 return 1;
6601 }
6602 return 0;
6603 }
6604
6605 /* Set # of hops between us and BGP peer. */
6606 int peer_ttl_security_hops_set(struct peer *peer, int gtsm_hops)
6607 {
6608 struct peer_group *group;
6609 struct listnode *node, *nnode;
6610 int ret;
6611
6612 zlog_debug("peer_ttl_security_hops_set: set gtsm_hops to %d for %s",
6613 gtsm_hops, peer->host);
6614
6615 /* We cannot configure ttl-security hops when ebgp-multihop is already
6616 set. For non peer-groups, the check is simple. For peer-groups,
6617 it's
6618 slightly messy, because we need to check both the peer-group
6619 structure
6620 and all peer-group members for any trace of ebgp-multihop
6621 configuration
6622 before actually applying the ttl-security rules. Cisco really made a
6623 mess of this configuration parameter, and OpenBGPD got it right.
6624 */
6625
6626 if ((peer->gtsm_hops == BGP_GTSM_HOPS_DISABLED)
6627 && (peer->sort != BGP_PEER_IBGP)) {
6628 if (is_ebgp_multihop_configured(peer))
6629 return BGP_ERR_NO_EBGP_MULTIHOP_WITH_TTLHACK;
6630
6631 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6632 peer->gtsm_hops = gtsm_hops;
6633
6634 /* Calling ebgp multihop also resets the session.
6635 * On restart, NHT will get setup correctly as will the
6636 * min & max ttls on the socket. The return value is
6637 * irrelevant.
6638 */
6639 ret = peer_ebgp_multihop_set(peer, MAXTTL);
6640
6641 if (ret != 0)
6642 return ret;
6643 } else {
6644 group = peer->group;
6645 for (ALL_LIST_ELEMENTS(group->peer, node, nnode,
6646 peer)) {
6647 peer->gtsm_hops = group->conf->gtsm_hops;
6648
6649 /* Calling ebgp multihop also resets the
6650 * session.
6651 * On restart, NHT will get setup correctly as
6652 * will the
6653 * min & max ttls on the socket. The return
6654 * value is
6655 * irrelevant.
6656 */
6657 peer_ebgp_multihop_set(peer, MAXTTL);
6658 }
6659 }
6660 } else {
6661 /* Post the first gtsm setup or if its ibgp, maxttl setting
6662 * isn't
6663 * necessary, just set the minttl.
6664 */
6665 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6666 peer->gtsm_hops = gtsm_hops;
6667
6668 if (peer->fd >= 0)
6669 sockopt_minttl(peer->su.sa.sa_family, peer->fd,
6670 MAXTTL + 1 - gtsm_hops);
6671 if ((peer->status < Established) && peer->doppelganger
6672 && (peer->doppelganger->fd >= 0))
6673 sockopt_minttl(peer->su.sa.sa_family,
6674 peer->doppelganger->fd,
6675 MAXTTL + 1 - gtsm_hops);
6676 } else {
6677 group = peer->group;
6678 for (ALL_LIST_ELEMENTS(group->peer, node, nnode,
6679 peer)) {
6680 peer->gtsm_hops = group->conf->gtsm_hops;
6681
6682 /* Change setting of existing peer
6683 * established then change value (may break
6684 * connectivity)
6685 * not established yet (teardown session and
6686 * restart)
6687 * no session then do nothing (will get
6688 * handled by next connection)
6689 */
6690 if (peer->fd >= 0
6691 && peer->gtsm_hops
6692 != BGP_GTSM_HOPS_DISABLED)
6693 sockopt_minttl(
6694 peer->su.sa.sa_family, peer->fd,
6695 MAXTTL + 1 - peer->gtsm_hops);
6696 if ((peer->status < Established)
6697 && peer->doppelganger
6698 && (peer->doppelganger->fd >= 0))
6699 sockopt_minttl(peer->su.sa.sa_family,
6700 peer->doppelganger->fd,
6701 MAXTTL + 1 - gtsm_hops);
6702 }
6703 }
6704 }
6705
6706 return 0;
6707 }
6708
6709 int peer_ttl_security_hops_unset(struct peer *peer)
6710 {
6711 struct peer_group *group;
6712 struct listnode *node, *nnode;
6713 int ret = 0;
6714
6715 zlog_debug("peer_ttl_security_hops_unset: set gtsm_hops to zero for %s",
6716 peer->host);
6717
6718 /* if a peer-group member, then reset to peer-group default rather than
6719 * 0 */
6720 if (peer_group_active(peer))
6721 peer->gtsm_hops = peer->group->conf->gtsm_hops;
6722 else
6723 peer->gtsm_hops = BGP_GTSM_HOPS_DISABLED;
6724
6725 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6726 /* Invoking ebgp_multihop_set will set the TTL back to the
6727 * original
6728 * value as well as restting the NHT and such. The session is
6729 * reset.
6730 */
6731 if (peer->sort == BGP_PEER_EBGP)
6732 ret = peer_ebgp_multihop_unset(peer);
6733 else {
6734 if (peer->fd >= 0)
6735 sockopt_minttl(peer->su.sa.sa_family, peer->fd,
6736 0);
6737
6738 if ((peer->status < Established) && peer->doppelganger
6739 && (peer->doppelganger->fd >= 0))
6740 sockopt_minttl(peer->su.sa.sa_family,
6741 peer->doppelganger->fd, 0);
6742 }
6743 } else {
6744 group = peer->group;
6745 for (ALL_LIST_ELEMENTS(group->peer, node, nnode, peer)) {
6746 peer->gtsm_hops = BGP_GTSM_HOPS_DISABLED;
6747 if (peer->sort == BGP_PEER_EBGP)
6748 ret = peer_ebgp_multihop_unset(peer);
6749 else {
6750 if (peer->fd >= 0)
6751 sockopt_minttl(peer->su.sa.sa_family,
6752 peer->fd, 0);
6753
6754 if ((peer->status < Established)
6755 && peer->doppelganger
6756 && (peer->doppelganger->fd >= 0))
6757 sockopt_minttl(peer->su.sa.sa_family,
6758 peer->doppelganger->fd,
6759 0);
6760 }
6761 }
6762 }
6763
6764 return ret;
6765 }
6766
6767 /*
6768 * If peer clear is invoked in a loop for all peers on the BGP instance,
6769 * it may end up freeing the doppelganger, and if this was the next node
6770 * to the current node, we would end up accessing the freed next node.
6771 * Pass along additional parameter which can be updated if next node
6772 * is freed; only required when walking the peer list on BGP instance.
6773 */
6774 int peer_clear(struct peer *peer, struct listnode **nnode)
6775 {
6776 if (!CHECK_FLAG(peer->flags, PEER_FLAG_SHUTDOWN)) {
6777 if (CHECK_FLAG(peer->sflags, PEER_STATUS_PREFIX_OVERFLOW)) {
6778 UNSET_FLAG(peer->sflags, PEER_STATUS_PREFIX_OVERFLOW);
6779 if (peer->t_pmax_restart) {
6780 BGP_TIMER_OFF(peer->t_pmax_restart);
6781 if (bgp_debug_neighbor_events(peer))
6782 zlog_debug(
6783 "%s Maximum-prefix restart timer canceled",
6784 peer->host);
6785 }
6786 BGP_EVENT_ADD(peer, BGP_Start);
6787 return 0;
6788 }
6789
6790 peer->v_start = BGP_INIT_START_TIMER;
6791 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status))
6792 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
6793 BGP_NOTIFY_CEASE_ADMIN_RESET);
6794 else
6795 bgp_session_reset_safe(peer, nnode);
6796 }
6797 return 0;
6798 }
6799
6800 int peer_clear_soft(struct peer *peer, afi_t afi, safi_t safi,
6801 enum bgp_clear_type stype)
6802 {
6803 struct peer_af *paf;
6804
6805 if (peer->status != Established)
6806 return 0;
6807
6808 if (!peer->afc[afi][safi])
6809 return BGP_ERR_AF_UNCONFIGURED;
6810
6811 peer->rtt = sockopt_tcp_rtt(peer->fd);
6812
6813 if (stype == BGP_CLEAR_SOFT_OUT || stype == BGP_CLEAR_SOFT_BOTH) {
6814 /* Clear the "neighbor x.x.x.x default-originate" flag */
6815 paf = peer_af_find(peer, afi, safi);
6816 if (paf && paf->subgroup
6817 && CHECK_FLAG(paf->subgroup->sflags,
6818 SUBGRP_STATUS_DEFAULT_ORIGINATE))
6819 UNSET_FLAG(paf->subgroup->sflags,
6820 SUBGRP_STATUS_DEFAULT_ORIGINATE);
6821
6822 bgp_announce_route(peer, afi, safi);
6823 }
6824
6825 if (stype == BGP_CLEAR_SOFT_IN_ORF_PREFIX) {
6826 if (CHECK_FLAG(peer->af_cap[afi][safi],
6827 PEER_CAP_ORF_PREFIX_SM_ADV)
6828 && (CHECK_FLAG(peer->af_cap[afi][safi],
6829 PEER_CAP_ORF_PREFIX_RM_RCV)
6830 || CHECK_FLAG(peer->af_cap[afi][safi],
6831 PEER_CAP_ORF_PREFIX_RM_OLD_RCV))) {
6832 struct bgp_filter *filter = &peer->filter[afi][safi];
6833 uint8_t prefix_type;
6834
6835 if (CHECK_FLAG(peer->af_cap[afi][safi],
6836 PEER_CAP_ORF_PREFIX_RM_RCV))
6837 prefix_type = ORF_TYPE_PREFIX;
6838 else
6839 prefix_type = ORF_TYPE_PREFIX_OLD;
6840
6841 if (filter->plist[FILTER_IN].plist) {
6842 if (CHECK_FLAG(peer->af_sflags[afi][safi],
6843 PEER_STATUS_ORF_PREFIX_SEND))
6844 bgp_route_refresh_send(
6845 peer, afi, safi, prefix_type,
6846 REFRESH_DEFER, 1);
6847 bgp_route_refresh_send(peer, afi, safi,
6848 prefix_type,
6849 REFRESH_IMMEDIATE, 0);
6850 } else {
6851 if (CHECK_FLAG(peer->af_sflags[afi][safi],
6852 PEER_STATUS_ORF_PREFIX_SEND))
6853 bgp_route_refresh_send(
6854 peer, afi, safi, prefix_type,
6855 REFRESH_IMMEDIATE, 1);
6856 else
6857 bgp_route_refresh_send(peer, afi, safi,
6858 0, 0, 0);
6859 }
6860 return 0;
6861 }
6862 }
6863
6864 if (stype == BGP_CLEAR_SOFT_IN || stype == BGP_CLEAR_SOFT_BOTH
6865 || stype == BGP_CLEAR_SOFT_IN_ORF_PREFIX) {
6866 /* If neighbor has soft reconfiguration inbound flag.
6867 Use Adj-RIB-In database. */
6868 if (CHECK_FLAG(peer->af_flags[afi][safi],
6869 PEER_FLAG_SOFT_RECONFIG))
6870 bgp_soft_reconfig_in(peer, afi, safi);
6871 else {
6872 /* If neighbor has route refresh capability, send route
6873 refresh
6874 message to the peer. */
6875 if (CHECK_FLAG(peer->cap, PEER_CAP_REFRESH_OLD_RCV)
6876 || CHECK_FLAG(peer->cap, PEER_CAP_REFRESH_NEW_RCV))
6877 bgp_route_refresh_send(peer, afi, safi, 0, 0,
6878 0);
6879 else
6880 return BGP_ERR_SOFT_RECONFIG_UNCONFIGURED;
6881 }
6882 }
6883 return 0;
6884 }
6885
6886 /* Display peer uptime.*/
6887 char *peer_uptime(time_t uptime2, char *buf, size_t len, bool use_json,
6888 json_object *json)
6889 {
6890 time_t uptime1, epoch_tbuf;
6891 struct tm tm;
6892
6893 /* If there is no connection has been done before print `never'. */
6894 if (uptime2 == 0) {
6895 if (use_json) {
6896 json_object_string_add(json, "peerUptime", "never");
6897 json_object_int_add(json, "peerUptimeMsec", 0);
6898 } else
6899 snprintf(buf, len, "never");
6900 return buf;
6901 }
6902
6903 /* Get current time. */
6904 uptime1 = bgp_clock();
6905 uptime1 -= uptime2;
6906 gmtime_r(&uptime1, &tm);
6907
6908 if (uptime1 < ONE_DAY_SECOND)
6909 snprintf(buf, len, "%02d:%02d:%02d", tm.tm_hour, tm.tm_min,
6910 tm.tm_sec);
6911 else if (uptime1 < ONE_WEEK_SECOND)
6912 snprintf(buf, len, "%dd%02dh%02dm", tm.tm_yday, tm.tm_hour,
6913 tm.tm_min);
6914 else if (uptime1 < ONE_YEAR_SECOND)
6915 snprintf(buf, len, "%02dw%dd%02dh", tm.tm_yday / 7,
6916 tm.tm_yday - ((tm.tm_yday / 7) * 7), tm.tm_hour);
6917 else
6918 snprintf(buf, len, "%02dy%02dw%dd", tm.tm_year - 70,
6919 tm.tm_yday / 7,
6920 tm.tm_yday - ((tm.tm_yday / 7) * 7));
6921
6922 if (use_json) {
6923 epoch_tbuf = time(NULL) - uptime1;
6924 json_object_string_add(json, "peerUptime", buf);
6925 json_object_int_add(json, "peerUptimeMsec", uptime1 * 1000);
6926 json_object_int_add(json, "peerUptimeEstablishedEpoch",
6927 epoch_tbuf);
6928 }
6929
6930 return buf;
6931 }
6932
6933 void bgp_master_init(struct thread_master *master, const int buffer_size)
6934 {
6935 qobj_init();
6936
6937 memset(&bgp_master, 0, sizeof(struct bgp_master));
6938
6939 bm = &bgp_master;
6940 bm->bgp = list_new();
6941 bm->listen_sockets = list_new();
6942 bm->port = BGP_PORT_DEFAULT;
6943 bm->master = master;
6944 bm->start_time = bgp_clock();
6945 bm->t_rmap_update = NULL;
6946 bm->rmap_update_timer = RMAP_DEFAULT_UPDATE_TIMER;
6947 bm->terminating = false;
6948 bm->socket_buffer = buffer_size;
6949
6950 bgp_process_queue_init();
6951
6952 bgp_mac_init();
6953 /* init the rd id space.
6954 assign 0th index in the bitfield,
6955 so that we start with id 1
6956 */
6957 bf_init(bm->rd_idspace, UINT16_MAX);
6958 bf_assign_zero_index(bm->rd_idspace);
6959
6960 /* mpls label dynamic allocation pool */
6961 bgp_lp_init(bm->master, &bm->labelpool);
6962
6963 bgp_evpn_mh_init();
6964 QOBJ_REG(bm, bgp_master);
6965 }
6966
6967 /*
6968 * Free up connected routes and interfaces for a BGP instance. Invoked upon
6969 * instance delete (non-default only) or BGP exit.
6970 */
6971 static void bgp_if_finish(struct bgp *bgp)
6972 {
6973 struct vrf *vrf;
6974 struct interface *ifp;
6975
6976 vrf = bgp_vrf_lookup_by_instance_type(bgp);
6977
6978 if (bgp->inst_type == BGP_INSTANCE_TYPE_VIEW || !vrf)
6979 return;
6980
6981 FOR_ALL_INTERFACES (vrf, ifp) {
6982 struct listnode *c_node, *c_nnode;
6983 struct connected *c;
6984
6985 for (ALL_LIST_ELEMENTS(ifp->connected, c_node, c_nnode, c))
6986 bgp_connected_delete(bgp, c);
6987 }
6988 }
6989
6990 static void bgp_viewvrf_autocomplete(vector comps, struct cmd_token *token)
6991 {
6992 struct vrf *vrf = NULL;
6993 struct listnode *next;
6994 struct bgp *bgp;
6995
6996 RB_FOREACH (vrf, vrf_name_head, &vrfs_by_name)
6997 vector_set(comps, XSTRDUP(MTYPE_COMPLETION, vrf->name));
6998
6999 for (ALL_LIST_ELEMENTS_RO(bm->bgp, next, bgp)) {
7000 if (bgp->inst_type != BGP_INSTANCE_TYPE_VIEW)
7001 continue;
7002
7003 vector_set(comps, XSTRDUP(MTYPE_COMPLETION, bgp->name));
7004 }
7005 }
7006
7007 static void bgp_instasn_autocomplete(vector comps, struct cmd_token *token)
7008 {
7009 struct listnode *next, *next2;
7010 struct bgp *bgp, *bgp2;
7011 char buf[11];
7012
7013 for (ALL_LIST_ELEMENTS_RO(bm->bgp, next, bgp)) {
7014 /* deduplicate */
7015 for (ALL_LIST_ELEMENTS_RO(bm->bgp, next2, bgp2)) {
7016 if (bgp2->as == bgp->as)
7017 break;
7018 if (bgp2 == bgp)
7019 break;
7020 }
7021 if (bgp2 != bgp)
7022 continue;
7023
7024 snprintf(buf, sizeof(buf), "%u", bgp->as);
7025 vector_set(comps, XSTRDUP(MTYPE_COMPLETION, buf));
7026 }
7027 }
7028
7029 static const struct cmd_variable_handler bgp_viewvrf_var_handlers[] = {
7030 {.tokenname = "VIEWVRFNAME", .completions = bgp_viewvrf_autocomplete},
7031 {.varname = "instasn", .completions = bgp_instasn_autocomplete},
7032 {.completions = NULL},
7033 };
7034
7035 struct frr_pthread *bgp_pth_io;
7036 struct frr_pthread *bgp_pth_ka;
7037
7038 static void bgp_pthreads_init(void)
7039 {
7040 assert(!bgp_pth_io);
7041 assert(!bgp_pth_ka);
7042
7043 struct frr_pthread_attr io = {
7044 .start = frr_pthread_attr_default.start,
7045 .stop = frr_pthread_attr_default.stop,
7046 };
7047 struct frr_pthread_attr ka = {
7048 .start = bgp_keepalives_start,
7049 .stop = bgp_keepalives_stop,
7050 };
7051 bgp_pth_io = frr_pthread_new(&io, "BGP I/O thread", "bgpd_io");
7052 bgp_pth_ka = frr_pthread_new(&ka, "BGP Keepalives thread", "bgpd_ka");
7053 }
7054
7055 void bgp_pthreads_run(void)
7056 {
7057 frr_pthread_run(bgp_pth_io, NULL);
7058 frr_pthread_run(bgp_pth_ka, NULL);
7059
7060 /* Wait until threads are ready. */
7061 frr_pthread_wait_running(bgp_pth_io);
7062 frr_pthread_wait_running(bgp_pth_ka);
7063 }
7064
7065 void bgp_pthreads_finish(void)
7066 {
7067 frr_pthread_stop_all();
7068 }
7069
7070 void bgp_init(unsigned short instance)
7071 {
7072
7073 /* allocates some vital data structures used by peer commands in
7074 * vty_init */
7075
7076 /* pre-init pthreads */
7077 bgp_pthreads_init();
7078
7079 /* Init zebra. */
7080 bgp_zebra_init(bm->master, instance);
7081
7082 #ifdef ENABLE_BGP_VNC
7083 vnc_zebra_init(bm->master);
7084 #endif
7085
7086 /* BGP VTY commands installation. */
7087 bgp_vty_init();
7088
7089 /* BGP inits. */
7090 bgp_attr_init();
7091 bgp_debug_init();
7092 bgp_dump_init();
7093 bgp_route_init();
7094 bgp_route_map_init();
7095 bgp_scan_vty_init();
7096 bgp_mplsvpn_init();
7097 #ifdef ENABLE_BGP_VNC
7098 rfapi_init();
7099 #endif
7100 bgp_ethernetvpn_init();
7101 bgp_flowspec_vty_init();
7102
7103 /* Access list initialize. */
7104 access_list_init();
7105 access_list_add_hook(peer_distribute_update);
7106 access_list_delete_hook(peer_distribute_update);
7107
7108 /* Filter list initialize. */
7109 bgp_filter_init();
7110 as_list_add_hook(peer_aslist_add);
7111 as_list_delete_hook(peer_aslist_del);
7112
7113 /* Prefix list initialize.*/
7114 prefix_list_init();
7115 prefix_list_add_hook(peer_prefix_list_update);
7116 prefix_list_delete_hook(peer_prefix_list_update);
7117
7118 /* Community list initialize. */
7119 bgp_clist = community_list_init();
7120
7121 /* BFD init */
7122 bgp_bfd_init();
7123
7124 cmd_variable_handler_register(bgp_viewvrf_var_handlers);
7125 }
7126
7127 void bgp_terminate(void)
7128 {
7129 struct bgp *bgp;
7130 struct peer *peer;
7131 struct listnode *node, *nnode;
7132 struct listnode *mnode, *mnnode;
7133
7134 QOBJ_UNREG(bm);
7135
7136 /* Close the listener sockets first as this prevents peers from
7137 * attempting
7138 * to reconnect on receiving the peer unconfig message. In the presence
7139 * of a large number of peers this will ensure that no peer is left with
7140 * a dangling connection
7141 */
7142 /* reverse bgp_master_init */
7143 bgp_close();
7144
7145 if (bm->listen_sockets)
7146 list_delete(&bm->listen_sockets);
7147
7148 for (ALL_LIST_ELEMENTS(bm->bgp, mnode, mnnode, bgp))
7149 for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer))
7150 if (peer->status == Established
7151 || peer->status == OpenSent
7152 || peer->status == OpenConfirm)
7153 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
7154 BGP_NOTIFY_CEASE_PEER_UNCONFIG);
7155
7156 if (bm->process_main_queue)
7157 work_queue_free_and_null(&bm->process_main_queue);
7158
7159 if (bm->t_rmap_update)
7160 BGP_TIMER_OFF(bm->t_rmap_update);
7161
7162 bgp_mac_finish();
7163 bgp_evpn_mh_finish();
7164 }
7165
7166 struct peer *peer_lookup_in_view(struct vty *vty, struct bgp *bgp,
7167 const char *ip_str, bool use_json)
7168 {
7169 int ret;
7170 struct peer *peer;
7171 union sockunion su;
7172
7173 /* Get peer sockunion. */
7174 ret = str2sockunion(ip_str, &su);
7175 if (ret < 0) {
7176 peer = peer_lookup_by_conf_if(bgp, ip_str);
7177 if (!peer) {
7178 peer = peer_lookup_by_hostname(bgp, ip_str);
7179
7180 if (!peer) {
7181 if (use_json) {
7182 json_object *json_no = NULL;
7183 json_no = json_object_new_object();
7184 json_object_string_add(
7185 json_no,
7186 "malformedAddressOrName",
7187 ip_str);
7188 vty_out(vty, "%s\n",
7189 json_object_to_json_string_ext(
7190 json_no,
7191 JSON_C_TO_STRING_PRETTY));
7192 json_object_free(json_no);
7193 } else
7194 vty_out(vty,
7195 "%% Malformed address or name: %s\n",
7196 ip_str);
7197 return NULL;
7198 }
7199 }
7200 return peer;
7201 }
7202
7203 /* Peer structure lookup. */
7204 peer = peer_lookup(bgp, &su);
7205 if (!peer) {
7206 if (use_json) {
7207 json_object *json_no = NULL;
7208 json_no = json_object_new_object();
7209 json_object_string_add(json_no, "warning",
7210 "No such neighbor in this view/vrf");
7211 vty_out(vty, "%s\n",
7212 json_object_to_json_string_ext(
7213 json_no, JSON_C_TO_STRING_PRETTY));
7214 json_object_free(json_no);
7215 } else
7216 vty_out(vty, "No such neighbor in this view/vrf\n");
7217 return NULL;
7218 }
7219
7220 return peer;
7221 }
7222
7223 void bgp_gr_apply_running_config(void)
7224 {
7225 struct peer *peer = NULL;
7226 struct bgp *bgp = NULL;
7227 struct listnode *node, *nnode;
7228 bool gr_router_detected = false;
7229
7230 if (BGP_DEBUG(graceful_restart, GRACEFUL_RESTART))
7231 zlog_debug("[BGP_GR] %s called !", __func__);
7232
7233 for (ALL_LIST_ELEMENTS(bm->bgp, node, nnode, bgp)) {
7234 for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) {
7235 bgp_peer_gr_flags_update(peer);
7236 if (CHECK_FLAG(peer->flags, PEER_FLAG_GRACEFUL_RESTART))
7237 gr_router_detected = true;
7238 }
7239
7240 if (gr_router_detected
7241 && bgp->present_zebra_gr_state == ZEBRA_GR_DISABLE) {
7242 bgp_zebra_send_capabilities(bgp, true);
7243 } else if (!gr_router_detected
7244 && bgp->present_zebra_gr_state == ZEBRA_GR_ENABLE) {
7245 bgp_zebra_send_capabilities(bgp, false);
7246 }
7247
7248 gr_router_detected = false;
7249 }
7250 }
FRRouting mirror