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Merge pull request #6918 from opensourcerouting/bgp-double-statement-removal
[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 (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status)) {
3979 char *msg = peer->tx_shutdown_message;
3980 size_t msglen;
3981
3982 if (!msg && peer_group_active(peer))
3983 msg = peer->group->conf
3984 ->tx_shutdown_message;
3985 msglen = msg ? strlen(msg) : 0;
3986 if (msglen > 128)
3987 msglen = 128;
3988
3989 if (msglen) {
3990 uint8_t msgbuf[129];
3991
3992 msgbuf[0] = msglen;
3993 memcpy(msgbuf + 1, msg, msglen);
3994
3995 bgp_notify_send_with_data(
3996 peer, BGP_NOTIFY_CEASE,
3997 BGP_NOTIFY_CEASE_ADMIN_SHUTDOWN,
3998 msgbuf, msglen + 1);
3999 } else
4000 bgp_notify_send(
4001 peer, BGP_NOTIFY_CEASE,
4002 BGP_NOTIFY_CEASE_ADMIN_SHUTDOWN);
4003 } else
4004 bgp_session_reset(peer);
4005 } else {
4006 peer->v_start = BGP_INIT_START_TIMER;
4007 BGP_EVENT_ADD(peer, BGP_Stop);
4008 }
4009 } else if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status)) {
4010 if (flag == PEER_FLAG_DYNAMIC_CAPABILITY)
4011 peer->last_reset = PEER_DOWN_CAPABILITY_CHANGE;
4012 else if (flag == PEER_FLAG_PASSIVE)
4013 peer->last_reset = PEER_DOWN_PASSIVE_CHANGE;
4014 else if (flag == PEER_FLAG_DISABLE_CONNECTED_CHECK)
4015 peer->last_reset = PEER_DOWN_MULTIHOP_CHANGE;
4016
4017 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
4018 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4019 } else
4020 bgp_session_reset(peer);
4021 }
4022
4023 /* Change specified peer flag. */
4024 static int peer_flag_modify(struct peer *peer, uint32_t flag, int set)
4025 {
4026 int found;
4027 int size;
4028 bool invert, member_invert;
4029 struct peer *member;
4030 struct listnode *node, *nnode;
4031 struct peer_flag_action action;
4032
4033 memset(&action, 0, sizeof(struct peer_flag_action));
4034 size = sizeof(peer_flag_action_list) / sizeof(struct peer_flag_action);
4035
4036 invert = CHECK_FLAG(peer->flags_invert, flag);
4037 found = peer_flag_action_set(peer_flag_action_list, size, &action,
4038 flag);
4039
4040 /* Abort if no flag action exists. */
4041 if (!found)
4042 return BGP_ERR_INVALID_FLAG;
4043
4044 /* Check for flag conflict: STRICT_CAP_MATCH && OVERRIDE_CAPABILITY */
4045 if (set && CHECK_FLAG(peer->flags | flag, PEER_FLAG_STRICT_CAP_MATCH)
4046 && CHECK_FLAG(peer->flags | flag, PEER_FLAG_OVERRIDE_CAPABILITY))
4047 return BGP_ERR_PEER_FLAG_CONFLICT;
4048
4049 /* Handle flag updates where desired state matches current state. */
4050 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4051 if (set && CHECK_FLAG(peer->flags, flag)) {
4052 COND_FLAG(peer->flags_override, flag, !invert);
4053 return 0;
4054 }
4055
4056 if (!set && !CHECK_FLAG(peer->flags, flag)) {
4057 COND_FLAG(peer->flags_override, flag, invert);
4058 return 0;
4059 }
4060 }
4061
4062 /* Inherit from peer-group or set/unset flags accordingly. */
4063 if (peer_group_active(peer) && set == invert)
4064 peer_flag_inherit(peer, flag);
4065 else
4066 COND_FLAG(peer->flags, flag, set);
4067
4068 /* Check if handling a regular peer. */
4069 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4070 /* Update flag override state accordingly. */
4071 COND_FLAG(peer->flags_override, flag, set != invert);
4072
4073 /*
4074 * For the extended next-hop encoding flag we need to turn RAs
4075 * on if flag is being set, but only turn RAs off if the flag
4076 * is being unset on this peer and if this peer is a member of a
4077 * peer-group, the peer-group also doesn't have the flag set.
4078 */
4079 if (flag == PEER_FLAG_CAPABILITY_ENHE) {
4080 if (set) {
4081 bgp_zebra_initiate_radv(peer->bgp, peer);
4082 } else if (peer_group_active(peer)) {
4083 if (!CHECK_FLAG(peer->group->conf->flags, flag))
4084 bgp_zebra_terminate_radv(peer->bgp,
4085 peer);
4086 } else
4087 bgp_zebra_terminate_radv(peer->bgp, peer);
4088 }
4089
4090 /* Execute flag action on peer. */
4091 if (action.type == peer_change_reset)
4092 peer_flag_modify_action(peer, flag);
4093
4094 /* Skip peer-group mechanics for regular peers. */
4095 return 0;
4096 }
4097
4098 /*
4099 * Update peer-group members, unless they are explicitely overriding
4100 * peer-group configuration.
4101 */
4102 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
4103 /* Skip peers with overridden configuration. */
4104 if (CHECK_FLAG(member->flags_override, flag))
4105 continue;
4106
4107 /* Check if only member without group is inverted. */
4108 member_invert =
4109 CHECK_FLAG(member->flags_invert, flag) && !invert;
4110
4111 /* Skip peers with equivalent configuration. */
4112 if (set != member_invert && CHECK_FLAG(member->flags, flag))
4113 continue;
4114
4115 if (set == member_invert && !CHECK_FLAG(member->flags, flag))
4116 continue;
4117
4118 /* Update flag on peer-group member. */
4119 COND_FLAG(member->flags, flag, set != member_invert);
4120
4121 if (flag == PEER_FLAG_CAPABILITY_ENHE)
4122 set ? bgp_zebra_initiate_radv(member->bgp, member)
4123 : bgp_zebra_terminate_radv(member->bgp, member);
4124
4125 /* Execute flag action on peer-group member. */
4126 if (action.type == peer_change_reset)
4127 peer_flag_modify_action(member, flag);
4128 }
4129
4130 return 0;
4131 }
4132
4133 int peer_flag_set(struct peer *peer, uint32_t flag)
4134 {
4135 return peer_flag_modify(peer, flag, 1);
4136 }
4137
4138 int peer_flag_unset(struct peer *peer, uint32_t flag)
4139 {
4140 return peer_flag_modify(peer, flag, 0);
4141 }
4142
4143 static int peer_af_flag_modify(struct peer *peer, afi_t afi, safi_t safi,
4144 uint32_t flag, bool set)
4145 {
4146 int found;
4147 int size;
4148 bool invert, member_invert;
4149 struct peer *member;
4150 struct listnode *node, *nnode;
4151 struct peer_flag_action action;
4152 bgp_peer_sort_t ptype;
4153
4154 memset(&action, 0, sizeof(struct peer_flag_action));
4155 size = sizeof(peer_af_flag_action_list)
4156 / sizeof(struct peer_flag_action);
4157
4158 invert = CHECK_FLAG(peer->af_flags_invert[afi][safi], flag);
4159 found = peer_flag_action_set(peer_af_flag_action_list, size, &action,
4160 flag);
4161
4162 /* Abort if flag action exists. */
4163 if (!found)
4164 return BGP_ERR_INVALID_FLAG;
4165
4166 ptype = peer_sort(peer);
4167 /* Special check for reflector client. */
4168 if (flag & PEER_FLAG_REFLECTOR_CLIENT && ptype != BGP_PEER_IBGP)
4169 return BGP_ERR_NOT_INTERNAL_PEER;
4170
4171 /* Special check for remove-private-AS. */
4172 if (flag & PEER_FLAG_REMOVE_PRIVATE_AS && ptype == BGP_PEER_IBGP)
4173 return BGP_ERR_REMOVE_PRIVATE_AS;
4174
4175 /* as-override is not allowed for IBGP peers */
4176 if (flag & PEER_FLAG_AS_OVERRIDE && ptype == BGP_PEER_IBGP)
4177 return BGP_ERR_AS_OVERRIDE;
4178
4179 /* Handle flag updates where desired state matches current state. */
4180 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4181 if (set && CHECK_FLAG(peer->af_flags[afi][safi], flag)) {
4182 COND_FLAG(peer->af_flags_override[afi][safi], flag,
4183 !invert);
4184 return 0;
4185 }
4186
4187 if (!set && !CHECK_FLAG(peer->af_flags[afi][safi], flag)) {
4188 COND_FLAG(peer->af_flags_override[afi][safi], flag,
4189 invert);
4190 return 0;
4191 }
4192 }
4193
4194 /*
4195 * For EVPN we implicitly set the NEXTHOP_UNCHANGED flag,
4196 * if we are setting/unsetting flags which conflict with this flag
4197 * handle accordingly
4198 */
4199 if (afi == AFI_L2VPN && safi == SAFI_EVPN) {
4200 if (set) {
4201
4202 /*
4203 * if we are setting NEXTHOP_SELF, we need to unset the
4204 * NEXTHOP_UNCHANGED flag
4205 */
4206 if (CHECK_FLAG(flag, PEER_FLAG_NEXTHOP_SELF) ||
4207 CHECK_FLAG(flag, PEER_FLAG_FORCE_NEXTHOP_SELF))
4208 UNSET_FLAG(peer->af_flags[afi][safi],
4209 PEER_FLAG_NEXTHOP_UNCHANGED);
4210 } else {
4211
4212 /*
4213 * if we are unsetting NEXTHOP_SELF, we need to set the
4214 * NEXTHOP_UNCHANGED flag to reset the defaults for EVPN
4215 */
4216 if (CHECK_FLAG(flag, PEER_FLAG_NEXTHOP_SELF) ||
4217 CHECK_FLAG(flag, PEER_FLAG_FORCE_NEXTHOP_SELF))
4218 SET_FLAG(peer->af_flags[afi][safi],
4219 PEER_FLAG_NEXTHOP_UNCHANGED);
4220 }
4221 }
4222
4223 /*
4224 * If the peer is a route server client let's not
4225 * muck with the nexthop on the way out the door
4226 */
4227 if (flag & PEER_FLAG_RSERVER_CLIENT) {
4228 if (set)
4229 SET_FLAG(peer->af_flags[afi][safi],
4230 PEER_FLAG_NEXTHOP_UNCHANGED);
4231 else
4232 UNSET_FLAG(peer->af_flags[afi][safi],
4233 PEER_FLAG_NEXTHOP_UNCHANGED);
4234 }
4235
4236 /* Inherit from peer-group or set/unset flags accordingly. */
4237 if (peer_group_active(peer) && set == invert)
4238 peer_af_flag_inherit(peer, afi, safi, flag);
4239 else
4240 COND_FLAG(peer->af_flags[afi][safi], flag, set);
4241
4242 /* Execute action when peer is established. */
4243 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)
4244 && peer->status == Established) {
4245 if (!set && flag == PEER_FLAG_SOFT_RECONFIG)
4246 bgp_clear_adj_in(peer, afi, safi);
4247 else {
4248 if (flag == PEER_FLAG_REFLECTOR_CLIENT)
4249 peer->last_reset = PEER_DOWN_RR_CLIENT_CHANGE;
4250 else if (flag == PEER_FLAG_RSERVER_CLIENT)
4251 peer->last_reset = PEER_DOWN_RS_CLIENT_CHANGE;
4252 else if (flag == PEER_FLAG_ORF_PREFIX_SM)
4253 peer->last_reset = PEER_DOWN_CAPABILITY_CHANGE;
4254 else if (flag == PEER_FLAG_ORF_PREFIX_RM)
4255 peer->last_reset = PEER_DOWN_CAPABILITY_CHANGE;
4256
4257 peer_change_action(peer, afi, safi, action.type);
4258 }
4259 }
4260
4261 /* Check if handling a regular peer. */
4262 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4263 COND_FLAG(peer->af_flags_override[afi][safi], flag,
4264 set != invert);
4265 } else {
4266 /*
4267 * Update peer-group members, unless they are explicitely
4268 * overriding peer-group configuration.
4269 */
4270 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode,
4271 member)) {
4272 /* Skip peers with overridden configuration. */
4273 if (CHECK_FLAG(member->af_flags_override[afi][safi],
4274 flag))
4275 continue;
4276
4277 /* Check if only member without group is inverted. */
4278 member_invert =
4279 CHECK_FLAG(member->af_flags_invert[afi][safi],
4280 flag)
4281 && !invert;
4282
4283 /* Skip peers with equivalent configuration. */
4284 if (set != member_invert
4285 && CHECK_FLAG(member->af_flags[afi][safi], flag))
4286 continue;
4287
4288 if (set == member_invert
4289 && !CHECK_FLAG(member->af_flags[afi][safi], flag))
4290 continue;
4291
4292 /* Update flag on peer-group member. */
4293 COND_FLAG(member->af_flags[afi][safi], flag,
4294 set != member_invert);
4295
4296 /* Execute flag action on peer-group member. */
4297 if (member->status == Established) {
4298 if (!set && flag == PEER_FLAG_SOFT_RECONFIG)
4299 bgp_clear_adj_in(member, afi, safi);
4300 else {
4301 if (flag == PEER_FLAG_REFLECTOR_CLIENT)
4302 member->last_reset =
4303 PEER_DOWN_RR_CLIENT_CHANGE;
4304 else if (flag
4305 == PEER_FLAG_RSERVER_CLIENT)
4306 member->last_reset =
4307 PEER_DOWN_RS_CLIENT_CHANGE;
4308 else if (flag
4309 == PEER_FLAG_ORF_PREFIX_SM)
4310 member->last_reset =
4311 PEER_DOWN_CAPABILITY_CHANGE;
4312 else if (flag
4313 == PEER_FLAG_ORF_PREFIX_RM)
4314 member->last_reset =
4315 PEER_DOWN_CAPABILITY_CHANGE;
4316
4317 peer_change_action(member, afi, safi,
4318 action.type);
4319 }
4320 }
4321 }
4322 }
4323
4324 return 0;
4325 }
4326
4327 int peer_af_flag_set(struct peer *peer, afi_t afi, safi_t safi, uint32_t flag)
4328 {
4329 return peer_af_flag_modify(peer, afi, safi, flag, 1);
4330 }
4331
4332 int peer_af_flag_unset(struct peer *peer, afi_t afi, safi_t safi, uint32_t flag)
4333 {
4334 return peer_af_flag_modify(peer, afi, safi, flag, 0);
4335 }
4336
4337
4338 void peer_tx_shutdown_message_set(struct peer *peer, const char *msg)
4339 {
4340 XFREE(MTYPE_PEER_TX_SHUTDOWN_MSG, peer->tx_shutdown_message);
4341 peer->tx_shutdown_message =
4342 msg ? XSTRDUP(MTYPE_PEER_TX_SHUTDOWN_MSG, msg) : NULL;
4343 }
4344
4345 void peer_tx_shutdown_message_unset(struct peer *peer)
4346 {
4347 XFREE(MTYPE_PEER_TX_SHUTDOWN_MSG, peer->tx_shutdown_message);
4348 }
4349
4350
4351 /* EBGP multihop configuration. */
4352 int peer_ebgp_multihop_set(struct peer *peer, int ttl)
4353 {
4354 struct peer_group *group;
4355 struct listnode *node, *nnode;
4356 struct peer *peer1;
4357
4358 if (peer->sort == BGP_PEER_IBGP || peer->conf_if)
4359 return 0;
4360
4361 /* see comment in peer_ttl_security_hops_set() */
4362 if (ttl != MAXTTL) {
4363 if (CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4364 group = peer->group;
4365 if (group->conf->gtsm_hops != BGP_GTSM_HOPS_DISABLED)
4366 return BGP_ERR_NO_EBGP_MULTIHOP_WITH_TTLHACK;
4367
4368 for (ALL_LIST_ELEMENTS(group->peer, node, nnode,
4369 peer1)) {
4370 if (peer1->sort == BGP_PEER_IBGP)
4371 continue;
4372
4373 if (peer1->gtsm_hops != BGP_GTSM_HOPS_DISABLED)
4374 return BGP_ERR_NO_EBGP_MULTIHOP_WITH_TTLHACK;
4375 }
4376 } else {
4377 if (peer->gtsm_hops != BGP_GTSM_HOPS_DISABLED)
4378 return BGP_ERR_NO_EBGP_MULTIHOP_WITH_TTLHACK;
4379 }
4380 }
4381
4382 peer->ttl = ttl;
4383
4384 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4385 if (peer->fd >= 0 && peer->sort != BGP_PEER_IBGP) {
4386 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status))
4387 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
4388 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4389 else
4390 bgp_session_reset(peer);
4391 }
4392 } else {
4393 group = peer->group;
4394 for (ALL_LIST_ELEMENTS(group->peer, node, nnode, peer)) {
4395 if (peer->sort == BGP_PEER_IBGP)
4396 continue;
4397
4398 peer->ttl = group->conf->ttl;
4399
4400 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status))
4401 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
4402 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4403 else
4404 bgp_session_reset(peer);
4405 }
4406 }
4407 return 0;
4408 }
4409
4410 int peer_ebgp_multihop_unset(struct peer *peer)
4411 {
4412 struct peer_group *group;
4413 struct listnode *node, *nnode;
4414
4415 if (peer->sort == BGP_PEER_IBGP)
4416 return 0;
4417
4418 if (peer->gtsm_hops != BGP_GTSM_HOPS_DISABLED && peer->ttl != MAXTTL)
4419 return BGP_ERR_NO_EBGP_MULTIHOP_WITH_TTLHACK;
4420
4421 if (peer_group_active(peer))
4422 peer->ttl = peer->group->conf->ttl;
4423 else
4424 peer->ttl = BGP_DEFAULT_TTL;
4425
4426 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4427 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status))
4428 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
4429 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4430 else
4431 bgp_session_reset(peer);
4432 } else {
4433 group = peer->group;
4434 for (ALL_LIST_ELEMENTS(group->peer, node, nnode, peer)) {
4435 if (peer->sort == BGP_PEER_IBGP)
4436 continue;
4437
4438 peer->ttl = BGP_DEFAULT_TTL;
4439
4440 if (peer->fd >= 0) {
4441 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status))
4442 bgp_notify_send(
4443 peer, BGP_NOTIFY_CEASE,
4444 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4445 else
4446 bgp_session_reset(peer);
4447 }
4448 }
4449 }
4450 return 0;
4451 }
4452
4453 /* Neighbor description. */
4454 void peer_description_set(struct peer *peer, const char *desc)
4455 {
4456 XFREE(MTYPE_PEER_DESC, peer->desc);
4457
4458 peer->desc = XSTRDUP(MTYPE_PEER_DESC, desc);
4459 }
4460
4461 void peer_description_unset(struct peer *peer)
4462 {
4463 XFREE(MTYPE_PEER_DESC, peer->desc);
4464 }
4465
4466 /* Neighbor update-source. */
4467 int peer_update_source_if_set(struct peer *peer, const char *ifname)
4468 {
4469 struct peer *member;
4470 struct listnode *node, *nnode;
4471
4472 /* Set flag and configuration on peer. */
4473 peer_flag_set(peer, PEER_FLAG_UPDATE_SOURCE);
4474 if (peer->update_if) {
4475 if (strcmp(peer->update_if, ifname) == 0)
4476 return 0;
4477 XFREE(MTYPE_PEER_UPDATE_SOURCE, peer->update_if);
4478 }
4479 peer->update_if = XSTRDUP(MTYPE_PEER_UPDATE_SOURCE, ifname);
4480 sockunion_free(peer->update_source);
4481 peer->update_source = NULL;
4482
4483 /* Check if handling a regular peer. */
4484 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4485 /* Send notification or reset peer depending on state. */
4486 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status)) {
4487 peer->last_reset = PEER_DOWN_UPDATE_SOURCE_CHANGE;
4488 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
4489 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4490 } else
4491 bgp_session_reset(peer);
4492
4493 /* Skip peer-group mechanics for regular peers. */
4494 return 0;
4495 }
4496
4497 /*
4498 * Set flag and configuration on all peer-group members, unless they are
4499 * explicitely overriding peer-group configuration.
4500 */
4501 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
4502 /* Skip peers with overridden configuration. */
4503 if (CHECK_FLAG(member->flags_override, PEER_FLAG_UPDATE_SOURCE))
4504 continue;
4505
4506 /* Skip peers with the same configuration. */
4507 if (member->update_if) {
4508 if (strcmp(member->update_if, ifname) == 0)
4509 continue;
4510 XFREE(MTYPE_PEER_UPDATE_SOURCE, member->update_if);
4511 }
4512
4513 /* Set flag and configuration on peer-group member. */
4514 SET_FLAG(member->flags, PEER_FLAG_UPDATE_SOURCE);
4515 member->update_if = XSTRDUP(MTYPE_PEER_UPDATE_SOURCE, ifname);
4516 sockunion_free(member->update_source);
4517 member->update_source = NULL;
4518
4519 /* Send notification or reset peer depending on state. */
4520 if (BGP_IS_VALID_STATE_FOR_NOTIF(member->status)) {
4521 member->last_reset = PEER_DOWN_UPDATE_SOURCE_CHANGE;
4522 bgp_notify_send(member, BGP_NOTIFY_CEASE,
4523 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4524 } else
4525 bgp_session_reset(member);
4526 }
4527
4528 return 0;
4529 }
4530
4531 int peer_update_source_addr_set(struct peer *peer, const union sockunion *su)
4532 {
4533 struct peer *member;
4534 struct listnode *node, *nnode;
4535
4536 /* Set flag and configuration on peer. */
4537 peer_flag_set(peer, PEER_FLAG_UPDATE_SOURCE);
4538 if (peer->update_source) {
4539 if (sockunion_cmp(peer->update_source, su) == 0)
4540 return 0;
4541 sockunion_free(peer->update_source);
4542 }
4543 peer->update_source = sockunion_dup(su);
4544 XFREE(MTYPE_PEER_UPDATE_SOURCE, peer->update_if);
4545
4546 /* Check if handling a regular peer. */
4547 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4548 /* Send notification or reset peer depending on state. */
4549 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status)) {
4550 peer->last_reset = PEER_DOWN_UPDATE_SOURCE_CHANGE;
4551 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
4552 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4553 } else
4554 bgp_session_reset(peer);
4555
4556 /* Skip peer-group mechanics for regular peers. */
4557 return 0;
4558 }
4559
4560 /*
4561 * Set flag and configuration on all peer-group members, unless they are
4562 * explicitely overriding peer-group configuration.
4563 */
4564 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
4565 /* Skip peers with overridden configuration. */
4566 if (CHECK_FLAG(member->flags_override, PEER_FLAG_UPDATE_SOURCE))
4567 continue;
4568
4569 /* Skip peers with the same configuration. */
4570 if (member->update_source) {
4571 if (sockunion_cmp(member->update_source, su) == 0)
4572 continue;
4573 sockunion_free(member->update_source);
4574 }
4575
4576 /* Set flag and configuration on peer-group member. */
4577 SET_FLAG(member->flags, PEER_FLAG_UPDATE_SOURCE);
4578 member->update_source = sockunion_dup(su);
4579 XFREE(MTYPE_PEER_UPDATE_SOURCE, member->update_if);
4580
4581 /* Send notification or reset peer depending on state. */
4582 if (BGP_IS_VALID_STATE_FOR_NOTIF(member->status)) {
4583 member->last_reset = PEER_DOWN_UPDATE_SOURCE_CHANGE;
4584 bgp_notify_send(member, BGP_NOTIFY_CEASE,
4585 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4586 } else
4587 bgp_session_reset(member);
4588 }
4589
4590 return 0;
4591 }
4592
4593 int peer_update_source_unset(struct peer *peer)
4594 {
4595 struct peer *member;
4596 struct listnode *node, *nnode;
4597
4598 if (!CHECK_FLAG(peer->flags, PEER_FLAG_UPDATE_SOURCE))
4599 return 0;
4600
4601 /* Inherit configuration from peer-group if peer is member. */
4602 if (peer_group_active(peer)) {
4603 peer_flag_inherit(peer, PEER_FLAG_UPDATE_SOURCE);
4604 PEER_SU_ATTR_INHERIT(peer, peer->group, update_source);
4605 PEER_STR_ATTR_INHERIT(peer, peer->group, update_if,
4606 MTYPE_PEER_UPDATE_SOURCE);
4607 } else {
4608 /* Otherwise remove flag and configuration from peer. */
4609 peer_flag_unset(peer, PEER_FLAG_UPDATE_SOURCE);
4610 sockunion_free(peer->update_source);
4611 peer->update_source = NULL;
4612 XFREE(MTYPE_PEER_UPDATE_SOURCE, peer->update_if);
4613 }
4614
4615 /* Check if handling a regular peer. */
4616 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4617 /* Send notification or reset peer depending on state. */
4618 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status)) {
4619 peer->last_reset = PEER_DOWN_UPDATE_SOURCE_CHANGE;
4620 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
4621 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4622 } else
4623 bgp_session_reset(peer);
4624
4625 /* Skip peer-group mechanics for regular peers. */
4626 return 0;
4627 }
4628
4629 /*
4630 * Set flag and configuration on all peer-group members, unless they are
4631 * explicitely overriding peer-group configuration.
4632 */
4633 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
4634 /* Skip peers with overridden configuration. */
4635 if (CHECK_FLAG(member->flags_override, PEER_FLAG_UPDATE_SOURCE))
4636 continue;
4637
4638 /* Skip peers with the same configuration. */
4639 if (!CHECK_FLAG(member->flags, PEER_FLAG_UPDATE_SOURCE)
4640 && !member->update_source && !member->update_if)
4641 continue;
4642
4643 /* Remove flag and configuration on peer-group member. */
4644 UNSET_FLAG(member->flags, PEER_FLAG_UPDATE_SOURCE);
4645 sockunion_free(member->update_source);
4646 member->update_source = NULL;
4647 XFREE(MTYPE_PEER_UPDATE_SOURCE, member->update_if);
4648
4649 /* Send notification or reset peer depending on state. */
4650 if (BGP_IS_VALID_STATE_FOR_NOTIF(member->status)) {
4651 member->last_reset = PEER_DOWN_UPDATE_SOURCE_CHANGE;
4652 bgp_notify_send(member, BGP_NOTIFY_CEASE,
4653 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4654 } else
4655 bgp_session_reset(member);
4656 }
4657
4658 return 0;
4659 }
4660
4661 int peer_default_originate_set(struct peer *peer, afi_t afi, safi_t safi,
4662 const char *rmap, struct route_map *route_map)
4663 {
4664 struct peer *member;
4665 struct listnode *node, *nnode;
4666
4667 /* Set flag and configuration on peer. */
4668 peer_af_flag_set(peer, afi, safi, PEER_FLAG_DEFAULT_ORIGINATE);
4669 if (rmap) {
4670 if (!peer->default_rmap[afi][safi].name
4671 || strcmp(rmap, peer->default_rmap[afi][safi].name) != 0) {
4672 if (peer->default_rmap[afi][safi].name)
4673 XFREE(MTYPE_ROUTE_MAP_NAME,
4674 peer->default_rmap[afi][safi].name);
4675
4676 route_map_counter_decrement(peer->default_rmap[afi][safi].map);
4677 peer->default_rmap[afi][safi].name =
4678 XSTRDUP(MTYPE_ROUTE_MAP_NAME, rmap);
4679 peer->default_rmap[afi][safi].map = route_map;
4680 route_map_counter_increment(route_map);
4681 }
4682 } else if (!rmap) {
4683 if (peer->default_rmap[afi][safi].name)
4684 XFREE(MTYPE_ROUTE_MAP_NAME,
4685 peer->default_rmap[afi][safi].name);
4686
4687 route_map_counter_decrement(peer->default_rmap[afi][safi].map);
4688 peer->default_rmap[afi][safi].name = NULL;
4689 peer->default_rmap[afi][safi].map = NULL;
4690 }
4691
4692 /* Check if handling a regular peer. */
4693 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4694 /* Update peer route announcements. */
4695 if (peer->status == Established && peer->afc_nego[afi][safi]) {
4696 update_group_adjust_peer(peer_af_find(peer, afi, safi));
4697 bgp_default_originate(peer, afi, safi, 0);
4698 bgp_announce_route(peer, afi, safi);
4699 }
4700
4701 /* Skip peer-group mechanics for regular peers. */
4702 return 0;
4703 }
4704
4705 /*
4706 * Set flag and configuration on all peer-group members, unless they are
4707 * explicitely overriding peer-group configuration.
4708 */
4709 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
4710 /* Skip peers with overridden configuration. */
4711 if (CHECK_FLAG(member->af_flags_override[afi][safi],
4712 PEER_FLAG_DEFAULT_ORIGINATE))
4713 continue;
4714
4715 /* Set flag and configuration on peer-group member. */
4716 SET_FLAG(member->af_flags[afi][safi],
4717 PEER_FLAG_DEFAULT_ORIGINATE);
4718 if (rmap) {
4719 if (member->default_rmap[afi][safi].name)
4720 XFREE(MTYPE_ROUTE_MAP_NAME,
4721 member->default_rmap[afi][safi].name);
4722 route_map_counter_decrement(
4723 member->default_rmap[afi][safi].map);
4724 member->default_rmap[afi][safi].name =
4725 XSTRDUP(MTYPE_ROUTE_MAP_NAME, rmap);
4726 member->default_rmap[afi][safi].map = route_map;
4727 route_map_counter_increment(route_map);
4728 }
4729
4730 /* Update peer route announcements. */
4731 if (member->status == Established
4732 && member->afc_nego[afi][safi]) {
4733 update_group_adjust_peer(
4734 peer_af_find(member, afi, safi));
4735 bgp_default_originate(member, afi, safi, 0);
4736 bgp_announce_route(member, afi, safi);
4737 }
4738 }
4739
4740 return 0;
4741 }
4742
4743 int peer_default_originate_unset(struct peer *peer, afi_t afi, safi_t safi)
4744 {
4745 struct peer *member;
4746 struct listnode *node, *nnode;
4747
4748 /* Inherit configuration from peer-group if peer is member. */
4749 if (peer_group_active(peer)) {
4750 peer_af_flag_inherit(peer, afi, safi,
4751 PEER_FLAG_DEFAULT_ORIGINATE);
4752 PEER_STR_ATTR_INHERIT(peer, peer->group,
4753 default_rmap[afi][safi].name,
4754 MTYPE_ROUTE_MAP_NAME);
4755 PEER_ATTR_INHERIT(peer, peer->group,
4756 default_rmap[afi][safi].map);
4757 } else {
4758 /* Otherwise remove flag and configuration from peer. */
4759 peer_af_flag_unset(peer, afi, safi,
4760 PEER_FLAG_DEFAULT_ORIGINATE);
4761 if (peer->default_rmap[afi][safi].name)
4762 XFREE(MTYPE_ROUTE_MAP_NAME,
4763 peer->default_rmap[afi][safi].name);
4764 route_map_counter_decrement(peer->default_rmap[afi][safi].map);
4765 peer->default_rmap[afi][safi].name = NULL;
4766 peer->default_rmap[afi][safi].map = NULL;
4767 }
4768
4769 /* Check if handling a regular peer. */
4770 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4771 /* Update peer route announcements. */
4772 if (peer->status == Established && peer->afc_nego[afi][safi]) {
4773 update_group_adjust_peer(peer_af_find(peer, afi, safi));
4774 bgp_default_originate(peer, afi, safi, 1);
4775 bgp_announce_route(peer, afi, safi);
4776 }
4777
4778 /* Skip peer-group mechanics for regular peers. */
4779 return 0;
4780 }
4781
4782 /*
4783 * Remove flag and configuration from all peer-group members, unless
4784 * they are explicitely overriding peer-group configuration.
4785 */
4786 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
4787 /* Skip peers with overridden configuration. */
4788 if (CHECK_FLAG(member->af_flags_override[afi][safi],
4789 PEER_FLAG_DEFAULT_ORIGINATE))
4790 continue;
4791
4792 /* Remove flag and configuration on peer-group member. */
4793 UNSET_FLAG(peer->af_flags[afi][safi],
4794 PEER_FLAG_DEFAULT_ORIGINATE);
4795 if (peer->default_rmap[afi][safi].name)
4796 XFREE(MTYPE_ROUTE_MAP_NAME,
4797 peer->default_rmap[afi][safi].name);
4798 route_map_counter_decrement(peer->default_rmap[afi][safi].map);
4799 peer->default_rmap[afi][safi].name = NULL;
4800 peer->default_rmap[afi][safi].map = NULL;
4801
4802 /* Update peer route announcements. */
4803 if (peer->status == Established && peer->afc_nego[afi][safi]) {
4804 update_group_adjust_peer(peer_af_find(peer, afi, safi));
4805 bgp_default_originate(peer, afi, safi, 1);
4806 bgp_announce_route(peer, afi, safi);
4807 }
4808 }
4809
4810 return 0;
4811 }
4812
4813 void peer_port_set(struct peer *peer, uint16_t port)
4814 {
4815 peer->port = port;
4816 }
4817
4818 void peer_port_unset(struct peer *peer)
4819 {
4820 peer->port = BGP_PORT_DEFAULT;
4821 }
4822
4823 /*
4824 * Helper function that is called after the name of the policy
4825 * being used by a peer has changed (AF specific). Automatically
4826 * initiates inbound or outbound processing as needed.
4827 */
4828 static void peer_on_policy_change(struct peer *peer, afi_t afi, safi_t safi,
4829 int outbound)
4830 {
4831 if (outbound) {
4832 update_group_adjust_peer(peer_af_find(peer, afi, safi));
4833 if (peer->status == Established)
4834 bgp_announce_route(peer, afi, safi);
4835 } else {
4836 if (peer->status != Established)
4837 return;
4838
4839 if (CHECK_FLAG(peer->af_flags[afi][safi],
4840 PEER_FLAG_SOFT_RECONFIG))
4841 bgp_soft_reconfig_in(peer, afi, safi);
4842 else if (CHECK_FLAG(peer->cap, PEER_CAP_REFRESH_OLD_RCV)
4843 || CHECK_FLAG(peer->cap, PEER_CAP_REFRESH_NEW_RCV))
4844 bgp_route_refresh_send(peer, afi, safi, 0, 0, 0);
4845 }
4846 }
4847
4848
4849 /* neighbor weight. */
4850 int peer_weight_set(struct peer *peer, afi_t afi, safi_t safi, uint16_t weight)
4851 {
4852 struct peer *member;
4853 struct listnode *node, *nnode;
4854
4855 /* Set flag and configuration on peer. */
4856 peer_af_flag_set(peer, afi, safi, PEER_FLAG_WEIGHT);
4857 if (peer->weight[afi][safi] != weight) {
4858 peer->weight[afi][safi] = weight;
4859 peer_on_policy_change(peer, afi, safi, 0);
4860 }
4861
4862 /* Skip peer-group mechanics for regular peers. */
4863 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP))
4864 return 0;
4865
4866 /*
4867 * Set flag and configuration on all peer-group members, unless they are
4868 * explicitely overriding peer-group configuration.
4869 */
4870 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
4871 /* Skip peers with overridden configuration. */
4872 if (CHECK_FLAG(member->af_flags_override[afi][safi],
4873 PEER_FLAG_WEIGHT))
4874 continue;
4875
4876 /* Set flag and configuration on peer-group member. */
4877 SET_FLAG(member->af_flags[afi][safi], PEER_FLAG_WEIGHT);
4878 if (member->weight[afi][safi] != weight) {
4879 member->weight[afi][safi] = weight;
4880 peer_on_policy_change(member, afi, safi, 0);
4881 }
4882 }
4883
4884 return 0;
4885 }
4886
4887 int peer_weight_unset(struct peer *peer, afi_t afi, safi_t safi)
4888 {
4889 struct peer *member;
4890 struct listnode *node, *nnode;
4891
4892 if (!CHECK_FLAG(peer->af_flags[afi][safi], PEER_FLAG_WEIGHT))
4893 return 0;
4894
4895 /* Inherit configuration from peer-group if peer is member. */
4896 if (peer_group_active(peer)) {
4897 peer_af_flag_inherit(peer, afi, safi, PEER_FLAG_WEIGHT);
4898 PEER_ATTR_INHERIT(peer, peer->group, weight[afi][safi]);
4899
4900 peer_on_policy_change(peer, afi, safi, 0);
4901 return 0;
4902 }
4903
4904 /* Remove flag and configuration from peer. */
4905 peer_af_flag_unset(peer, afi, safi, PEER_FLAG_WEIGHT);
4906 peer->weight[afi][safi] = 0;
4907 peer_on_policy_change(peer, afi, safi, 0);
4908
4909 /* Skip peer-group mechanics for regular peers. */
4910 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP))
4911 return 0;
4912
4913 /*
4914 * Remove flag and configuration from all peer-group members, unless
4915 * they are explicitely overriding peer-group configuration.
4916 */
4917 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
4918 /* Skip peers with overridden configuration. */
4919 if (CHECK_FLAG(member->af_flags_override[afi][safi],
4920 PEER_FLAG_WEIGHT))
4921 continue;
4922
4923 /* Skip peers where flag is already disabled. */
4924 if (!CHECK_FLAG(member->af_flags[afi][safi], PEER_FLAG_WEIGHT))
4925 continue;
4926
4927 /* Remove flag and configuration on peer-group member. */
4928 UNSET_FLAG(member->af_flags[afi][safi], PEER_FLAG_WEIGHT);
4929 member->weight[afi][safi] = 0;
4930 peer_on_policy_change(member, afi, safi, 0);
4931 }
4932
4933 return 0;
4934 }
4935
4936 int peer_timers_set(struct peer *peer, uint32_t keepalive, uint32_t holdtime)
4937 {
4938 struct peer *member;
4939 struct listnode *node, *nnode;
4940
4941 if (keepalive > 65535)
4942 return BGP_ERR_INVALID_VALUE;
4943
4944 if (holdtime > 65535)
4945 return BGP_ERR_INVALID_VALUE;
4946
4947 if (holdtime < 3 && holdtime != 0)
4948 return BGP_ERR_INVALID_VALUE;
4949
4950 /* Set flag and configuration on peer. */
4951 peer_flag_set(peer, PEER_FLAG_TIMER);
4952 peer->holdtime = holdtime;
4953 peer->keepalive = (keepalive < holdtime / 3 ? keepalive : holdtime / 3);
4954
4955 /* Skip peer-group mechanics for regular peers. */
4956 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP))
4957 return 0;
4958
4959 /*
4960 * Set flag and configuration on all peer-group members, unless they are
4961 * explicitely overriding peer-group configuration.
4962 */
4963 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
4964 /* Skip peers with overridden configuration. */
4965 if (CHECK_FLAG(member->flags_override, PEER_FLAG_TIMER))
4966 continue;
4967
4968 /* Set flag and configuration on peer-group member. */
4969 SET_FLAG(member->flags, PEER_FLAG_TIMER);
4970 PEER_ATTR_INHERIT(peer, peer->group, holdtime);
4971 PEER_ATTR_INHERIT(peer, peer->group, keepalive);
4972 }
4973
4974 return 0;
4975 }
4976
4977 int peer_timers_unset(struct peer *peer)
4978 {
4979 struct peer *member;
4980 struct listnode *node, *nnode;
4981
4982 /* Inherit configuration from peer-group if peer is member. */
4983 if (peer_group_active(peer)) {
4984 peer_flag_inherit(peer, PEER_FLAG_TIMER);
4985 PEER_ATTR_INHERIT(peer, peer->group, holdtime);
4986 PEER_ATTR_INHERIT(peer, peer->group, keepalive);
4987 } else {
4988 /* Otherwise remove flag and configuration from peer. */
4989 peer_flag_unset(peer, PEER_FLAG_TIMER);
4990 peer->holdtime = 0;
4991 peer->keepalive = 0;
4992 }
4993
4994 /* Skip peer-group mechanics for regular peers. */
4995 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP))
4996 return 0;
4997
4998 /*
4999 * Remove flag and configuration from all peer-group members, unless
5000 * they are explicitely overriding peer-group configuration.
5001 */
5002 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5003 /* Skip peers with overridden configuration. */
5004 if (CHECK_FLAG(member->flags_override, PEER_FLAG_TIMER))
5005 continue;
5006
5007 /* Remove flag and configuration on peer-group member. */
5008 UNSET_FLAG(member->flags, PEER_FLAG_TIMER);
5009 member->holdtime = 0;
5010 member->keepalive = 0;
5011 }
5012
5013 return 0;
5014 }
5015
5016 int peer_timers_connect_set(struct peer *peer, uint32_t connect)
5017 {
5018 struct peer *member;
5019 struct listnode *node, *nnode;
5020
5021 if (connect > 65535)
5022 return BGP_ERR_INVALID_VALUE;
5023
5024 /* Set flag and configuration on peer. */
5025 peer_flag_set(peer, PEER_FLAG_TIMER_CONNECT);
5026 peer->connect = connect;
5027 peer->v_connect = connect;
5028
5029 /* Skip peer-group mechanics for regular peers. */
5030 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP))
5031 return 0;
5032
5033 /*
5034 * Set flag and configuration on all peer-group members, unless they are
5035 * explicitely overriding peer-group configuration.
5036 */
5037 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5038 /* Skip peers with overridden configuration. */
5039 if (CHECK_FLAG(member->flags_override, PEER_FLAG_TIMER_CONNECT))
5040 continue;
5041
5042 /* Set flag and configuration on peer-group member. */
5043 SET_FLAG(member->flags, PEER_FLAG_TIMER_CONNECT);
5044 member->connect = connect;
5045 member->v_connect = connect;
5046 }
5047
5048 return 0;
5049 }
5050
5051 int peer_timers_connect_unset(struct peer *peer)
5052 {
5053 struct peer *member;
5054 struct listnode *node, *nnode;
5055
5056 /* Inherit configuration from peer-group if peer is member. */
5057 if (peer_group_active(peer)) {
5058 peer_flag_inherit(peer, PEER_FLAG_TIMER_CONNECT);
5059 PEER_ATTR_INHERIT(peer, peer->group, connect);
5060 } else {
5061 /* Otherwise remove flag and configuration from peer. */
5062 peer_flag_unset(peer, PEER_FLAG_TIMER_CONNECT);
5063 peer->connect = 0;
5064 }
5065
5066 /* Set timer with fallback to default value. */
5067 if (peer->connect)
5068 peer->v_connect = peer->connect;
5069 else
5070 peer->v_connect = peer->bgp->default_connect_retry;
5071
5072 /* Skip peer-group mechanics for regular peers. */
5073 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP))
5074 return 0;
5075
5076 /*
5077 * Remove flag and configuration from all peer-group members, unless
5078 * they are explicitely overriding peer-group configuration.
5079 */
5080 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5081 /* Skip peers with overridden configuration. */
5082 if (CHECK_FLAG(member->flags_override, PEER_FLAG_TIMER_CONNECT))
5083 continue;
5084
5085 /* Remove flag and configuration on peer-group member. */
5086 UNSET_FLAG(member->flags, PEER_FLAG_TIMER_CONNECT);
5087 member->connect = 0;
5088 member->v_connect = peer->bgp->default_connect_retry;
5089 }
5090
5091 return 0;
5092 }
5093
5094 int peer_advertise_interval_set(struct peer *peer, uint32_t routeadv)
5095 {
5096 struct peer *member;
5097 struct listnode *node, *nnode;
5098
5099 if (routeadv > 600)
5100 return BGP_ERR_INVALID_VALUE;
5101
5102 /* Set flag and configuration on peer. */
5103 peer_flag_set(peer, PEER_FLAG_ROUTEADV);
5104 peer->routeadv = routeadv;
5105 peer->v_routeadv = routeadv;
5106
5107 /* Check if handling a regular peer. */
5108 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
5109 /* Update peer route announcements. */
5110 update_group_adjust_peer_afs(peer);
5111 if (peer->status == Established)
5112 bgp_announce_route_all(peer);
5113
5114 /* Skip peer-group mechanics for regular peers. */
5115 return 0;
5116 }
5117
5118 /*
5119 * Set flag and configuration on all peer-group members, unless they are
5120 * explicitely overriding peer-group configuration.
5121 */
5122 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5123 /* Skip peers with overridden configuration. */
5124 if (CHECK_FLAG(member->flags_override, PEER_FLAG_ROUTEADV))
5125 continue;
5126
5127 /* Set flag and configuration on peer-group member. */
5128 SET_FLAG(member->flags, PEER_FLAG_ROUTEADV);
5129 member->routeadv = routeadv;
5130 member->v_routeadv = routeadv;
5131
5132 /* Update peer route announcements. */
5133 update_group_adjust_peer_afs(member);
5134 if (member->status == Established)
5135 bgp_announce_route_all(member);
5136 }
5137
5138 return 0;
5139 }
5140
5141 int peer_advertise_interval_unset(struct peer *peer)
5142 {
5143 struct peer *member;
5144 struct listnode *node, *nnode;
5145
5146 /* Inherit configuration from peer-group if peer is member. */
5147 if (peer_group_active(peer)) {
5148 peer_flag_inherit(peer, PEER_FLAG_ROUTEADV);
5149 PEER_ATTR_INHERIT(peer, peer->group, routeadv);
5150 } else {
5151 /* Otherwise remove flag and configuration from peer. */
5152 peer_flag_unset(peer, PEER_FLAG_ROUTEADV);
5153 peer->routeadv = 0;
5154 }
5155
5156 /* Set timer with fallback to default value. */
5157 if (peer->routeadv)
5158 peer->v_routeadv = peer->routeadv;
5159 else
5160 peer->v_routeadv = (peer->sort == BGP_PEER_IBGP)
5161 ? BGP_DEFAULT_IBGP_ROUTEADV
5162 : BGP_DEFAULT_EBGP_ROUTEADV;
5163
5164 /* Check if handling a regular peer. */
5165 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
5166 /* Update peer route announcements. */
5167 update_group_adjust_peer_afs(peer);
5168 if (peer->status == Established)
5169 bgp_announce_route_all(peer);
5170
5171 /* Skip peer-group mechanics for regular peers. */
5172 return 0;
5173 }
5174
5175 /*
5176 * Remove flag and configuration from all peer-group members, unless
5177 * they are explicitely overriding peer-group configuration.
5178 */
5179 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5180 /* Skip peers with overridden configuration. */
5181 if (CHECK_FLAG(member->flags_override, PEER_FLAG_ROUTEADV))
5182 continue;
5183
5184 /* Remove flag and configuration on peer-group member. */
5185 UNSET_FLAG(member->flags, PEER_FLAG_ROUTEADV);
5186 member->routeadv = 0;
5187 member->v_routeadv = (member->sort == BGP_PEER_IBGP)
5188 ? BGP_DEFAULT_IBGP_ROUTEADV
5189 : BGP_DEFAULT_EBGP_ROUTEADV;
5190
5191 /* Update peer route announcements. */
5192 update_group_adjust_peer_afs(member);
5193 if (member->status == Established)
5194 bgp_announce_route_all(member);
5195 }
5196
5197 return 0;
5198 }
5199
5200 /* neighbor interface */
5201 void peer_interface_set(struct peer *peer, const char *str)
5202 {
5203 XFREE(MTYPE_BGP_PEER_IFNAME, peer->ifname);
5204 peer->ifname = XSTRDUP(MTYPE_BGP_PEER_IFNAME, str);
5205 }
5206
5207 void peer_interface_unset(struct peer *peer)
5208 {
5209 XFREE(MTYPE_BGP_PEER_IFNAME, peer->ifname);
5210 }
5211
5212 /* Allow-as in. */
5213 int peer_allowas_in_set(struct peer *peer, afi_t afi, safi_t safi,
5214 int allow_num, int origin)
5215 {
5216 struct peer *member;
5217 struct listnode *node, *nnode;
5218
5219 if (!origin && (allow_num < 1 || allow_num > 10))
5220 return BGP_ERR_INVALID_VALUE;
5221
5222 /* Set flag and configuration on peer. */
5223 peer_af_flag_set(peer, afi, safi, PEER_FLAG_ALLOWAS_IN);
5224 if (origin) {
5225 if (peer->allowas_in[afi][safi] != 0
5226 || !CHECK_FLAG(peer->af_flags[afi][safi],
5227 PEER_FLAG_ALLOWAS_IN_ORIGIN)) {
5228 peer_af_flag_set(peer, afi, safi,
5229 PEER_FLAG_ALLOWAS_IN_ORIGIN);
5230 peer->allowas_in[afi][safi] = 0;
5231 peer_on_policy_change(peer, afi, safi, 0);
5232 }
5233 } else {
5234 if (peer->allowas_in[afi][safi] != allow_num
5235 || CHECK_FLAG(peer->af_flags[afi][safi],
5236 PEER_FLAG_ALLOWAS_IN_ORIGIN)) {
5237
5238 peer_af_flag_unset(peer, afi, safi,
5239 PEER_FLAG_ALLOWAS_IN_ORIGIN);
5240 peer->allowas_in[afi][safi] = allow_num;
5241 peer_on_policy_change(peer, afi, safi, 0);
5242 }
5243 }
5244
5245 /* Skip peer-group mechanics for regular peers. */
5246 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP))
5247 return 0;
5248
5249 /*
5250 * Set flag and configuration on all peer-group members, unless
5251 * they are explicitely overriding peer-group configuration.
5252 */
5253 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5254 /* Skip peers with overridden configuration. */
5255 if (CHECK_FLAG(member->af_flags_override[afi][safi],
5256 PEER_FLAG_ALLOWAS_IN))
5257 continue;
5258
5259 /* Set flag and configuration on peer-group member. */
5260 SET_FLAG(member->af_flags[afi][safi], PEER_FLAG_ALLOWAS_IN);
5261 if (origin) {
5262 if (member->allowas_in[afi][safi] != 0
5263 || !CHECK_FLAG(member->af_flags[afi][safi],
5264 PEER_FLAG_ALLOWAS_IN_ORIGIN)) {
5265 SET_FLAG(member->af_flags[afi][safi],
5266 PEER_FLAG_ALLOWAS_IN_ORIGIN);
5267 member->allowas_in[afi][safi] = 0;
5268 peer_on_policy_change(peer, afi, safi, 0);
5269 }
5270 } else {
5271 if (member->allowas_in[afi][safi] != allow_num
5272 || CHECK_FLAG(member->af_flags[afi][safi],
5273 PEER_FLAG_ALLOWAS_IN_ORIGIN)) {
5274 UNSET_FLAG(member->af_flags[afi][safi],
5275 PEER_FLAG_ALLOWAS_IN_ORIGIN);
5276 member->allowas_in[afi][safi] = allow_num;
5277 peer_on_policy_change(peer, afi, safi, 0);
5278 }
5279 }
5280 }
5281
5282 return 0;
5283 }
5284
5285 int peer_allowas_in_unset(struct peer *peer, afi_t afi, safi_t safi)
5286 {
5287 struct peer *member;
5288 struct listnode *node, *nnode;
5289
5290 /* Skip peer if flag is already disabled. */
5291 if (!CHECK_FLAG(peer->af_flags[afi][safi], PEER_FLAG_ALLOWAS_IN))
5292 return 0;
5293
5294 /* Inherit configuration from peer-group if peer is member. */
5295 if (peer_group_active(peer)) {
5296 peer_af_flag_inherit(peer, afi, safi, PEER_FLAG_ALLOWAS_IN);
5297 peer_af_flag_inherit(peer, afi, safi,
5298 PEER_FLAG_ALLOWAS_IN_ORIGIN);
5299 PEER_ATTR_INHERIT(peer, peer->group, allowas_in[afi][safi]);
5300 peer_on_policy_change(peer, afi, safi, 0);
5301
5302 return 0;
5303 }
5304
5305 /* Remove flag and configuration from peer. */
5306 peer_af_flag_unset(peer, afi, safi, PEER_FLAG_ALLOWAS_IN);
5307 peer_af_flag_unset(peer, afi, safi, PEER_FLAG_ALLOWAS_IN_ORIGIN);
5308 peer->allowas_in[afi][safi] = 0;
5309 peer_on_policy_change(peer, afi, safi, 0);
5310
5311 /* Skip peer-group mechanics if handling a regular peer. */
5312 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP))
5313 return 0;
5314
5315 /*
5316 * Remove flags and configuration from all peer-group members, unless
5317 * they are explicitely overriding peer-group configuration.
5318 */
5319 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5320 /* Skip peers with overridden configuration. */
5321 if (CHECK_FLAG(member->af_flags_override[afi][safi],
5322 PEER_FLAG_ALLOWAS_IN))
5323 continue;
5324
5325 /* Skip peers where flag is already disabled. */
5326 if (!CHECK_FLAG(member->af_flags[afi][safi],
5327 PEER_FLAG_ALLOWAS_IN))
5328 continue;
5329
5330 /* Remove flags and configuration on peer-group member. */
5331 UNSET_FLAG(member->af_flags[afi][safi], PEER_FLAG_ALLOWAS_IN);
5332 UNSET_FLAG(member->af_flags[afi][safi],
5333 PEER_FLAG_ALLOWAS_IN_ORIGIN);
5334 member->allowas_in[afi][safi] = 0;
5335 peer_on_policy_change(member, afi, safi, 0);
5336 }
5337
5338 return 0;
5339 }
5340
5341 int peer_local_as_set(struct peer *peer, as_t as, int no_prepend,
5342 int replace_as)
5343 {
5344 bool old_no_prepend, old_replace_as;
5345 struct bgp *bgp = peer->bgp;
5346 struct peer *member;
5347 struct listnode *node, *nnode;
5348 bgp_peer_sort_t ptype = peer_sort(peer);
5349
5350 if (ptype != BGP_PEER_EBGP && ptype != BGP_PEER_INTERNAL)
5351 return BGP_ERR_LOCAL_AS_ALLOWED_ONLY_FOR_EBGP;
5352
5353 if (bgp->as == as)
5354 return BGP_ERR_CANNOT_HAVE_LOCAL_AS_SAME_AS;
5355
5356 if (peer->as == as)
5357 return BGP_ERR_CANNOT_HAVE_LOCAL_AS_SAME_AS_REMOTE_AS;
5358
5359 /* Save previous flag states. */
5360 old_no_prepend =
5361 !!CHECK_FLAG(peer->flags, PEER_FLAG_LOCAL_AS_NO_PREPEND);
5362 old_replace_as =
5363 !!CHECK_FLAG(peer->flags, PEER_FLAG_LOCAL_AS_REPLACE_AS);
5364
5365 /* Set flag and configuration on peer. */
5366 peer_flag_set(peer, PEER_FLAG_LOCAL_AS);
5367 peer_flag_modify(peer, PEER_FLAG_LOCAL_AS_NO_PREPEND, no_prepend);
5368 peer_flag_modify(peer, PEER_FLAG_LOCAL_AS_REPLACE_AS, replace_as);
5369
5370 if (peer->change_local_as == as && old_no_prepend == no_prepend
5371 && old_replace_as == replace_as)
5372 return 0;
5373 peer->change_local_as = as;
5374
5375 /* Check if handling a regular peer. */
5376 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
5377 /* Send notification or reset peer depending on state. */
5378 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status)) {
5379 peer->last_reset = PEER_DOWN_LOCAL_AS_CHANGE;
5380 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
5381 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
5382 } else
5383 bgp_session_reset(peer);
5384
5385 /* Skip peer-group mechanics for regular peers. */
5386 return 0;
5387 }
5388
5389 /*
5390 * Set flag and configuration on all peer-group members, unless they are
5391 * explicitely overriding peer-group configuration.
5392 */
5393 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5394 /* Skip peers with overridden configuration. */
5395 if (CHECK_FLAG(member->flags_override, PEER_FLAG_LOCAL_AS))
5396 continue;
5397
5398 /* Skip peers with the same configuration. */
5399 old_no_prepend = CHECK_FLAG(member->flags,
5400 PEER_FLAG_LOCAL_AS_NO_PREPEND);
5401 old_replace_as = CHECK_FLAG(member->flags,
5402 PEER_FLAG_LOCAL_AS_REPLACE_AS);
5403 if (member->change_local_as == as
5404 && CHECK_FLAG(member->flags, PEER_FLAG_LOCAL_AS)
5405 && old_no_prepend == no_prepend
5406 && old_replace_as == replace_as)
5407 continue;
5408
5409 /* Set flag and configuration on peer-group member. */
5410 SET_FLAG(member->flags, PEER_FLAG_LOCAL_AS);
5411 COND_FLAG(member->flags, PEER_FLAG_LOCAL_AS_NO_PREPEND,
5412 no_prepend);
5413 COND_FLAG(member->flags, PEER_FLAG_LOCAL_AS_REPLACE_AS,
5414 replace_as);
5415 member->change_local_as = as;
5416
5417 /* Send notification or stop peer depending on state. */
5418 if (BGP_IS_VALID_STATE_FOR_NOTIF(member->status)) {
5419 member->last_reset = PEER_DOWN_LOCAL_AS_CHANGE;
5420 bgp_notify_send(member, BGP_NOTIFY_CEASE,
5421 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
5422 } else
5423 BGP_EVENT_ADD(member, BGP_Stop);
5424 }
5425
5426 return 0;
5427 }
5428
5429 int peer_local_as_unset(struct peer *peer)
5430 {
5431 struct peer *member;
5432 struct listnode *node, *nnode;
5433
5434 if (!CHECK_FLAG(peer->flags, PEER_FLAG_LOCAL_AS))
5435 return 0;
5436
5437 /* Inherit configuration from peer-group if peer is member. */
5438 if (peer_group_active(peer)) {
5439 peer_flag_inherit(peer, PEER_FLAG_LOCAL_AS);
5440 peer_flag_inherit(peer, PEER_FLAG_LOCAL_AS_NO_PREPEND);
5441 peer_flag_inherit(peer, PEER_FLAG_LOCAL_AS_REPLACE_AS);
5442 PEER_ATTR_INHERIT(peer, peer->group, change_local_as);
5443 } else {
5444 /* Otherwise remove flag and configuration from peer. */
5445 peer_flag_unset(peer, PEER_FLAG_LOCAL_AS);
5446 peer_flag_unset(peer, PEER_FLAG_LOCAL_AS_NO_PREPEND);
5447 peer_flag_unset(peer, PEER_FLAG_LOCAL_AS_REPLACE_AS);
5448 peer->change_local_as = 0;
5449 }
5450
5451 /* Check if handling a regular peer. */
5452 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
5453 /* Send notification or stop peer depending on state. */
5454 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status)) {
5455 peer->last_reset = PEER_DOWN_LOCAL_AS_CHANGE;
5456 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
5457 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
5458 } else
5459 BGP_EVENT_ADD(peer, BGP_Stop);
5460
5461 /* Skip peer-group mechanics for regular peers. */
5462 return 0;
5463 }
5464
5465 /*
5466 * Remove flag and configuration from all peer-group members, unless
5467 * they are explicitely overriding peer-group configuration.
5468 */
5469 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5470 /* Skip peers with overridden configuration. */
5471 if (CHECK_FLAG(member->flags_override, PEER_FLAG_LOCAL_AS))
5472 continue;
5473
5474 /* Remove flag and configuration on peer-group member. */
5475 UNSET_FLAG(member->flags, PEER_FLAG_LOCAL_AS);
5476 UNSET_FLAG(member->flags, PEER_FLAG_LOCAL_AS_NO_PREPEND);
5477 UNSET_FLAG(member->flags, PEER_FLAG_LOCAL_AS_REPLACE_AS);
5478 member->change_local_as = 0;
5479
5480 /* Send notification or stop peer depending on state. */
5481 if (BGP_IS_VALID_STATE_FOR_NOTIF(member->status)) {
5482 member->last_reset = PEER_DOWN_LOCAL_AS_CHANGE;
5483 bgp_notify_send(member, BGP_NOTIFY_CEASE,
5484 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
5485 } else
5486 bgp_session_reset(member);
5487 }
5488
5489 return 0;
5490 }
5491
5492 /* Set password for authenticating with the peer. */
5493 int peer_password_set(struct peer *peer, const char *password)
5494 {
5495 struct peer *member;
5496 struct listnode *node, *nnode;
5497 int len = password ? strlen(password) : 0;
5498 int ret = BGP_SUCCESS;
5499
5500 if ((len < PEER_PASSWORD_MINLEN) || (len > PEER_PASSWORD_MAXLEN))
5501 return BGP_ERR_INVALID_VALUE;
5502
5503 /* Set flag and configuration on peer. */
5504 peer_flag_set(peer, PEER_FLAG_PASSWORD);
5505 if (peer->password && strcmp(peer->password, password) == 0)
5506 return 0;
5507 XFREE(MTYPE_PEER_PASSWORD, peer->password);
5508 peer->password = XSTRDUP(MTYPE_PEER_PASSWORD, password);
5509
5510 /* Check if handling a regular peer. */
5511 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
5512 /* Send notification or reset peer depending on state. */
5513 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status))
5514 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
5515 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
5516 else
5517 bgp_session_reset(peer);
5518
5519 /*
5520 * Attempt to install password on socket and skip peer-group
5521 * mechanics.
5522 */
5523 if (BGP_PEER_SU_UNSPEC(peer))
5524 return BGP_SUCCESS;
5525 return (bgp_md5_set(peer) >= 0) ? BGP_SUCCESS
5526 : BGP_ERR_TCPSIG_FAILED;
5527 }
5528
5529 /*
5530 * Set flag and configuration on all peer-group members, unless they are
5531 * explicitely overriding peer-group configuration.
5532 */
5533 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5534 /* Skip peers with overridden configuration. */
5535 if (CHECK_FLAG(member->flags_override, PEER_FLAG_PASSWORD))
5536 continue;
5537
5538 /* Skip peers with the same password. */
5539 if (member->password && strcmp(member->password, password) == 0)
5540 continue;
5541
5542 /* Set flag and configuration on peer-group member. */
5543 SET_FLAG(member->flags, PEER_FLAG_PASSWORD);
5544 if (member->password)
5545 XFREE(MTYPE_PEER_PASSWORD, member->password);
5546 member->password = XSTRDUP(MTYPE_PEER_PASSWORD, password);
5547
5548 /* Send notification or reset peer depending on state. */
5549 if (BGP_IS_VALID_STATE_FOR_NOTIF(member->status))
5550 bgp_notify_send(member, BGP_NOTIFY_CEASE,
5551 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
5552 else
5553 bgp_session_reset(member);
5554
5555 /* Attempt to install password on socket. */
5556 if (!BGP_PEER_SU_UNSPEC(member) && bgp_md5_set(member) < 0)
5557 ret = BGP_ERR_TCPSIG_FAILED;
5558 }
5559
5560 /* Set flag and configuration on all peer-group listen ranges */
5561 struct listnode *ln;
5562 struct prefix *lr;
5563
5564 for (ALL_LIST_ELEMENTS_RO(peer->group->listen_range[AFI_IP], ln, lr))
5565 bgp_md5_set_prefix(lr, password);
5566 for (ALL_LIST_ELEMENTS_RO(peer->group->listen_range[AFI_IP6], ln, lr))
5567 bgp_md5_set_prefix(lr, password);
5568
5569 return ret;
5570 }
5571
5572 int peer_password_unset(struct peer *peer)
5573 {
5574 struct peer *member;
5575 struct listnode *node, *nnode;
5576
5577 if (!CHECK_FLAG(peer->flags, PEER_FLAG_PASSWORD))
5578 return 0;
5579
5580 /* Inherit configuration from peer-group if peer is member. */
5581 if (peer_group_active(peer)) {
5582 peer_flag_inherit(peer, PEER_FLAG_PASSWORD);
5583 PEER_STR_ATTR_INHERIT(peer, peer->group, password,
5584 MTYPE_PEER_PASSWORD);
5585 } else {
5586 /* Otherwise remove flag and configuration from peer. */
5587 peer_flag_unset(peer, PEER_FLAG_PASSWORD);
5588 XFREE(MTYPE_PEER_PASSWORD, peer->password);
5589 }
5590
5591 /* Check if handling a regular peer. */
5592 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
5593 /* Send notification or reset peer depending on state. */
5594 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status))
5595 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
5596 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
5597 else
5598 bgp_session_reset(peer);
5599
5600 /* Attempt to uninstall password on socket. */
5601 if (!BGP_PEER_SU_UNSPEC(peer))
5602 bgp_md5_unset(peer);
5603
5604 /* Skip peer-group mechanics for regular peers. */
5605 return 0;
5606 }
5607
5608 /*
5609 * Remove flag and configuration from all peer-group members, unless
5610 * they are explicitely overriding peer-group configuration.
5611 */
5612 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5613 /* Skip peers with overridden configuration. */
5614 if (CHECK_FLAG(member->flags_override, PEER_FLAG_PASSWORD))
5615 continue;
5616
5617 /* Remove flag and configuration on peer-group member. */
5618 UNSET_FLAG(member->flags, PEER_FLAG_PASSWORD);
5619 XFREE(MTYPE_PEER_PASSWORD, member->password);
5620
5621 /* Send notification or reset peer depending on state. */
5622 if (BGP_IS_VALID_STATE_FOR_NOTIF(member->status))
5623 bgp_notify_send(member, BGP_NOTIFY_CEASE,
5624 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
5625 else
5626 bgp_session_reset(member);
5627
5628 /* Attempt to uninstall password on socket. */
5629 if (!BGP_PEER_SU_UNSPEC(member))
5630 bgp_md5_unset(member);
5631 }
5632
5633 /* Set flag and configuration on all peer-group listen ranges */
5634 struct listnode *ln;
5635 struct prefix *lr;
5636
5637 for (ALL_LIST_ELEMENTS_RO(peer->group->listen_range[AFI_IP], ln, lr))
5638 bgp_md5_unset_prefix(lr);
5639 for (ALL_LIST_ELEMENTS_RO(peer->group->listen_range[AFI_IP6], ln, lr))
5640 bgp_md5_unset_prefix(lr);
5641
5642 return 0;
5643 }
5644
5645
5646 /* Set distribute list to the peer. */
5647 int peer_distribute_set(struct peer *peer, afi_t afi, safi_t safi, int direct,
5648 const char *name)
5649 {
5650 struct peer *member;
5651 struct bgp_filter *filter;
5652 struct listnode *node, *nnode;
5653
5654 if (direct != FILTER_IN && direct != FILTER_OUT)
5655 return BGP_ERR_INVALID_VALUE;
5656
5657 /* Set configuration on peer. */
5658 filter = &peer->filter[afi][safi];
5659 if (filter->plist[direct].name)
5660 return BGP_ERR_PEER_FILTER_CONFLICT;
5661 if (filter->dlist[direct].name)
5662 XFREE(MTYPE_BGP_FILTER_NAME, filter->dlist[direct].name);
5663 filter->dlist[direct].name = XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
5664 filter->dlist[direct].alist = access_list_lookup(afi, name);
5665
5666 /* Check if handling a regular peer. */
5667 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
5668 /* Set override-flag and process peer route updates. */
5669 SET_FLAG(peer->filter_override[afi][safi][direct],
5670 PEER_FT_DISTRIBUTE_LIST);
5671 peer_on_policy_change(peer, afi, safi,
5672 (direct == FILTER_OUT) ? 1 : 0);
5673
5674 /* Skip peer-group mechanics for regular peers. */
5675 return 0;
5676 }
5677
5678 /*
5679 * Set configuration on all peer-group members, un less they are
5680 * explicitely overriding peer-group configuration.
5681 */
5682 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5683 /* Skip peers with overridden configuration. */
5684 if (CHECK_FLAG(member->filter_override[afi][safi][direct],
5685 PEER_FT_DISTRIBUTE_LIST))
5686 continue;
5687
5688 /* Set configuration on peer-group member. */
5689 filter = &member->filter[afi][safi];
5690 if (filter->dlist[direct].name)
5691 XFREE(MTYPE_BGP_FILTER_NAME,
5692 filter->dlist[direct].name);
5693 filter->dlist[direct].name =
5694 XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
5695 filter->dlist[direct].alist = access_list_lookup(afi, name);
5696
5697 /* Process peer route updates. */
5698 peer_on_policy_change(member, afi, safi,
5699 (direct == FILTER_OUT) ? 1 : 0);
5700 }
5701
5702 return 0;
5703 }
5704
5705 int peer_distribute_unset(struct peer *peer, afi_t afi, safi_t safi, int direct)
5706 {
5707 struct peer *member;
5708 struct bgp_filter *filter;
5709 struct listnode *node, *nnode;
5710
5711 if (direct != FILTER_IN && direct != FILTER_OUT)
5712 return BGP_ERR_INVALID_VALUE;
5713
5714 /* Unset override-flag unconditionally. */
5715 UNSET_FLAG(peer->filter_override[afi][safi][direct],
5716 PEER_FT_DISTRIBUTE_LIST);
5717
5718 /* Inherit configuration from peer-group if peer is member. */
5719 if (peer_group_active(peer)) {
5720 PEER_STR_ATTR_INHERIT(peer, peer->group,
5721 filter[afi][safi].dlist[direct].name,
5722 MTYPE_BGP_FILTER_NAME);
5723 PEER_ATTR_INHERIT(peer, peer->group,
5724 filter[afi][safi].dlist[direct].alist);
5725 } else {
5726 /* Otherwise remove configuration from peer. */
5727 filter = &peer->filter[afi][safi];
5728 if (filter->dlist[direct].name)
5729 XFREE(MTYPE_BGP_FILTER_NAME,
5730 filter->dlist[direct].name);
5731 filter->dlist[direct].name = NULL;
5732 filter->dlist[direct].alist = NULL;
5733 }
5734
5735 /* Check if handling a regular peer. */
5736 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
5737 /* Process peer route updates. */
5738 peer_on_policy_change(peer, afi, safi,
5739 (direct == FILTER_OUT) ? 1 : 0);
5740
5741 /* Skip peer-group mechanics for regular peers. */
5742 return 0;
5743 }
5744
5745 /*
5746 * Remove configuration on all peer-group members, unless they are
5747 * explicitely overriding peer-group configuration.
5748 */
5749 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5750 /* Skip peers with overridden configuration. */
5751 if (CHECK_FLAG(member->filter_override[afi][safi][direct],
5752 PEER_FT_DISTRIBUTE_LIST))
5753 continue;
5754
5755 /* Remove configuration on peer-group member. */
5756 filter = &member->filter[afi][safi];
5757 if (filter->dlist[direct].name)
5758 XFREE(MTYPE_BGP_FILTER_NAME,
5759 filter->dlist[direct].name);
5760 filter->dlist[direct].name = NULL;
5761 filter->dlist[direct].alist = NULL;
5762
5763 /* Process peer route updates. */
5764 peer_on_policy_change(member, afi, safi,
5765 (direct == FILTER_OUT) ? 1 : 0);
5766 }
5767
5768 return 0;
5769 }
5770
5771 /* Update distribute list. */
5772 static void peer_distribute_update(struct access_list *access)
5773 {
5774 afi_t afi;
5775 safi_t safi;
5776 int direct;
5777 struct listnode *mnode, *mnnode;
5778 struct listnode *node, *nnode;
5779 struct bgp *bgp;
5780 struct peer *peer;
5781 struct peer_group *group;
5782 struct bgp_filter *filter;
5783
5784 for (ALL_LIST_ELEMENTS(bm->bgp, mnode, mnnode, bgp)) {
5785 if (access->name)
5786 update_group_policy_update(bgp, BGP_POLICY_FILTER_LIST,
5787 access->name, 0, 0);
5788 for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) {
5789 FOREACH_AFI_SAFI (afi, safi) {
5790 filter = &peer->filter[afi][safi];
5791
5792 for (direct = FILTER_IN; direct < FILTER_MAX;
5793 direct++) {
5794 if (filter->dlist[direct].name)
5795 filter->dlist[direct]
5796 .alist = access_list_lookup(
5797 afi,
5798 filter->dlist[direct]
5799 .name);
5800 else
5801 filter->dlist[direct].alist =
5802 NULL;
5803 }
5804 }
5805 }
5806 for (ALL_LIST_ELEMENTS(bgp->group, node, nnode, group)) {
5807 FOREACH_AFI_SAFI (afi, safi) {
5808 filter = &group->conf->filter[afi][safi];
5809
5810 for (direct = FILTER_IN; direct < FILTER_MAX;
5811 direct++) {
5812 if (filter->dlist[direct].name)
5813 filter->dlist[direct]
5814 .alist = access_list_lookup(
5815 afi,
5816 filter->dlist[direct]
5817 .name);
5818 else
5819 filter->dlist[direct].alist =
5820 NULL;
5821 }
5822 }
5823 }
5824 #ifdef ENABLE_BGP_VNC
5825 vnc_prefix_list_update(bgp);
5826 #endif
5827 }
5828 }
5829
5830 /* Set prefix list to the peer. */
5831 int peer_prefix_list_set(struct peer *peer, afi_t afi, safi_t safi, int direct,
5832 const char *name)
5833 {
5834 struct peer *member;
5835 struct bgp_filter *filter;
5836 struct listnode *node, *nnode;
5837
5838 if (direct != FILTER_IN && direct != FILTER_OUT)
5839 return BGP_ERR_INVALID_VALUE;
5840
5841 /* Set configuration on peer. */
5842 filter = &peer->filter[afi][safi];
5843 if (filter->dlist[direct].name)
5844 return BGP_ERR_PEER_FILTER_CONFLICT;
5845 if (filter->plist[direct].name)
5846 XFREE(MTYPE_BGP_FILTER_NAME, filter->plist[direct].name);
5847 filter->plist[direct].name = XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
5848 filter->plist[direct].plist = prefix_list_lookup(afi, name);
5849
5850 /* Check if handling a regular peer. */
5851 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
5852 /* Set override-flag and process peer route updates. */
5853 SET_FLAG(peer->filter_override[afi][safi][direct],
5854 PEER_FT_PREFIX_LIST);
5855 peer_on_policy_change(peer, afi, safi,
5856 (direct == FILTER_OUT) ? 1 : 0);
5857
5858 /* Skip peer-group mechanics for regular peers. */
5859 return 0;
5860 }
5861
5862 /*
5863 * Set configuration on all peer-group members, unless they are
5864 * explicitely overriding peer-group configuration.
5865 */
5866 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5867 /* Skip peers with overridden configuration. */
5868 if (CHECK_FLAG(member->filter_override[afi][safi][direct],
5869 PEER_FT_PREFIX_LIST))
5870 continue;
5871
5872 /* Set configuration on peer-group member. */
5873 filter = &member->filter[afi][safi];
5874 if (filter->plist[direct].name)
5875 XFREE(MTYPE_BGP_FILTER_NAME,
5876 filter->plist[direct].name);
5877 filter->plist[direct].name =
5878 XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
5879 filter->plist[direct].plist = prefix_list_lookup(afi, name);
5880
5881 /* Process peer route updates. */
5882 peer_on_policy_change(member, afi, safi,
5883 (direct == FILTER_OUT) ? 1 : 0);
5884 }
5885
5886 return 0;
5887 }
5888
5889 int peer_prefix_list_unset(struct peer *peer, afi_t afi, safi_t safi,
5890 int direct)
5891 {
5892 struct peer *member;
5893 struct bgp_filter *filter;
5894 struct listnode *node, *nnode;
5895
5896 if (direct != FILTER_IN && direct != FILTER_OUT)
5897 return BGP_ERR_INVALID_VALUE;
5898
5899 /* Unset override-flag unconditionally. */
5900 UNSET_FLAG(peer->filter_override[afi][safi][direct],
5901 PEER_FT_PREFIX_LIST);
5902
5903 /* Inherit configuration from peer-group if peer is member. */
5904 if (peer_group_active(peer)) {
5905 PEER_STR_ATTR_INHERIT(peer, peer->group,
5906 filter[afi][safi].plist[direct].name,
5907 MTYPE_BGP_FILTER_NAME);
5908 PEER_ATTR_INHERIT(peer, peer->group,
5909 filter[afi][safi].plist[direct].plist);
5910 } else {
5911 /* Otherwise remove configuration from peer. */
5912 filter = &peer->filter[afi][safi];
5913 if (filter->plist[direct].name)
5914 XFREE(MTYPE_BGP_FILTER_NAME,
5915 filter->plist[direct].name);
5916 filter->plist[direct].name = NULL;
5917 filter->plist[direct].plist = NULL;
5918 }
5919
5920 /* Check if handling a regular peer. */
5921 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
5922 /* Process peer route updates. */
5923 peer_on_policy_change(peer, afi, safi,
5924 (direct == FILTER_OUT) ? 1 : 0);
5925
5926 /* Skip peer-group mechanics for regular peers. */
5927 return 0;
5928 }
5929
5930 /*
5931 * Remove configuration on all peer-group members, unless they are
5932 * explicitely overriding peer-group configuration.
5933 */
5934 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5935 /* Skip peers with overridden configuration. */
5936 if (CHECK_FLAG(member->filter_override[afi][safi][direct],
5937 PEER_FT_PREFIX_LIST))
5938 continue;
5939
5940 /* Remove configuration on peer-group member. */
5941 filter = &member->filter[afi][safi];
5942 if (filter->plist[direct].name)
5943 XFREE(MTYPE_BGP_FILTER_NAME,
5944 filter->plist[direct].name);
5945 filter->plist[direct].name = NULL;
5946 filter->plist[direct].plist = NULL;
5947
5948 /* Process peer route updates. */
5949 peer_on_policy_change(member, afi, safi,
5950 (direct == FILTER_OUT) ? 1 : 0);
5951 }
5952
5953 return 0;
5954 }
5955
5956 /* Update prefix-list list. */
5957 static void peer_prefix_list_update(struct prefix_list *plist)
5958 {
5959 struct listnode *mnode, *mnnode;
5960 struct listnode *node, *nnode;
5961 struct bgp *bgp;
5962 struct peer *peer;
5963 struct peer_group *group;
5964 struct bgp_filter *filter;
5965 afi_t afi;
5966 safi_t safi;
5967 int direct;
5968
5969 for (ALL_LIST_ELEMENTS(bm->bgp, mnode, mnnode, bgp)) {
5970
5971 /*
5972 * Update the prefix-list on update groups.
5973 */
5974 update_group_policy_update(
5975 bgp, BGP_POLICY_PREFIX_LIST,
5976 plist ? prefix_list_name(plist) : NULL, 0, 0);
5977
5978 for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) {
5979 FOREACH_AFI_SAFI (afi, safi) {
5980 filter = &peer->filter[afi][safi];
5981
5982 for (direct = FILTER_IN; direct < FILTER_MAX;
5983 direct++) {
5984 if (filter->plist[direct].name)
5985 filter->plist[direct]
5986 .plist = prefix_list_lookup(
5987 afi,
5988 filter->plist[direct]
5989 .name);
5990 else
5991 filter->plist[direct].plist =
5992 NULL;
5993 }
5994 }
5995 }
5996 for (ALL_LIST_ELEMENTS(bgp->group, node, nnode, group)) {
5997 FOREACH_AFI_SAFI (afi, safi) {
5998 filter = &group->conf->filter[afi][safi];
5999
6000 for (direct = FILTER_IN; direct < FILTER_MAX;
6001 direct++) {
6002 if (filter->plist[direct].name)
6003 filter->plist[direct]
6004 .plist = prefix_list_lookup(
6005 afi,
6006 filter->plist[direct]
6007 .name);
6008 else
6009 filter->plist[direct].plist =
6010 NULL;
6011 }
6012 }
6013 }
6014 }
6015 }
6016
6017 int peer_aslist_set(struct peer *peer, afi_t afi, safi_t safi, int direct,
6018 const char *name)
6019 {
6020 struct peer *member;
6021 struct bgp_filter *filter;
6022 struct listnode *node, *nnode;
6023
6024 if (direct != FILTER_IN && direct != FILTER_OUT)
6025 return BGP_ERR_INVALID_VALUE;
6026
6027 /* Set configuration on peer. */
6028 filter = &peer->filter[afi][safi];
6029 if (filter->aslist[direct].name)
6030 XFREE(MTYPE_BGP_FILTER_NAME, filter->aslist[direct].name);
6031 filter->aslist[direct].name = XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
6032 filter->aslist[direct].aslist = as_list_lookup(name);
6033
6034 /* Check if handling a regular peer. */
6035 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6036 /* Set override-flag and process peer route updates. */
6037 SET_FLAG(peer->filter_override[afi][safi][direct],
6038 PEER_FT_FILTER_LIST);
6039 peer_on_policy_change(peer, afi, safi,
6040 (direct == FILTER_OUT) ? 1 : 0);
6041
6042 /* Skip peer-group mechanics for regular peers. */
6043 return 0;
6044 }
6045
6046 /*
6047 * Set configuration on all peer-group members, unless they are
6048 * explicitely overriding peer-group configuration.
6049 */
6050 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
6051 /* Skip peers with overridden configuration. */
6052 if (CHECK_FLAG(member->filter_override[afi][safi][direct],
6053 PEER_FT_FILTER_LIST))
6054 continue;
6055
6056 /* Set configuration on peer-group member. */
6057 filter = &member->filter[afi][safi];
6058 if (filter->aslist[direct].name)
6059 XFREE(MTYPE_BGP_FILTER_NAME,
6060 filter->aslist[direct].name);
6061 filter->aslist[direct].name =
6062 XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
6063 filter->aslist[direct].aslist = as_list_lookup(name);
6064
6065 /* Process peer route updates. */
6066 peer_on_policy_change(member, afi, safi,
6067 (direct == FILTER_OUT) ? 1 : 0);
6068 }
6069
6070 return 0;
6071 }
6072
6073 int peer_aslist_unset(struct peer *peer, afi_t afi, safi_t safi, int direct)
6074 {
6075 struct peer *member;
6076 struct bgp_filter *filter;
6077 struct listnode *node, *nnode;
6078
6079 if (direct != FILTER_IN && direct != FILTER_OUT)
6080 return BGP_ERR_INVALID_VALUE;
6081
6082 /* Unset override-flag unconditionally. */
6083 UNSET_FLAG(peer->filter_override[afi][safi][direct],
6084 PEER_FT_FILTER_LIST);
6085
6086 /* Inherit configuration from peer-group if peer is member. */
6087 if (peer_group_active(peer)) {
6088 PEER_STR_ATTR_INHERIT(peer, peer->group,
6089 filter[afi][safi].aslist[direct].name,
6090 MTYPE_BGP_FILTER_NAME);
6091 PEER_ATTR_INHERIT(peer, peer->group,
6092 filter[afi][safi].aslist[direct].aslist);
6093 } else {
6094 /* Otherwise remove configuration from peer. */
6095 filter = &peer->filter[afi][safi];
6096 if (filter->aslist[direct].name)
6097 XFREE(MTYPE_BGP_FILTER_NAME,
6098 filter->aslist[direct].name);
6099 filter->aslist[direct].name = NULL;
6100 filter->aslist[direct].aslist = NULL;
6101 }
6102
6103 /* Check if handling a regular peer. */
6104 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6105 /* Process peer route updates. */
6106 peer_on_policy_change(peer, afi, safi,
6107 (direct == FILTER_OUT) ? 1 : 0);
6108
6109 /* Skip peer-group mechanics for regular peers. */
6110 return 0;
6111 }
6112
6113 /*
6114 * Remove configuration on all peer-group members, unless they are
6115 * explicitely overriding peer-group configuration.
6116 */
6117 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
6118 /* Skip peers with overridden configuration. */
6119 if (CHECK_FLAG(member->filter_override[afi][safi][direct],
6120 PEER_FT_FILTER_LIST))
6121 continue;
6122
6123 /* Remove configuration on peer-group member. */
6124 filter = &member->filter[afi][safi];
6125 if (filter->aslist[direct].name)
6126 XFREE(MTYPE_BGP_FILTER_NAME,
6127 filter->aslist[direct].name);
6128 filter->aslist[direct].name = NULL;
6129 filter->aslist[direct].aslist = NULL;
6130
6131 /* Process peer route updates. */
6132 peer_on_policy_change(member, afi, safi,
6133 (direct == FILTER_OUT) ? 1 : 0);
6134 }
6135
6136 return 0;
6137 }
6138
6139 static void peer_aslist_update(const char *aslist_name)
6140 {
6141 afi_t afi;
6142 safi_t safi;
6143 int direct;
6144 struct listnode *mnode, *mnnode;
6145 struct listnode *node, *nnode;
6146 struct bgp *bgp;
6147 struct peer *peer;
6148 struct peer_group *group;
6149 struct bgp_filter *filter;
6150
6151 for (ALL_LIST_ELEMENTS(bm->bgp, mnode, mnnode, bgp)) {
6152 update_group_policy_update(bgp, BGP_POLICY_FILTER_LIST,
6153 aslist_name, 0, 0);
6154
6155 for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) {
6156 FOREACH_AFI_SAFI (afi, safi) {
6157 filter = &peer->filter[afi][safi];
6158
6159 for (direct = FILTER_IN; direct < FILTER_MAX;
6160 direct++) {
6161 if (filter->aslist[direct].name)
6162 filter->aslist[direct]
6163 .aslist = as_list_lookup(
6164 filter->aslist[direct]
6165 .name);
6166 else
6167 filter->aslist[direct].aslist =
6168 NULL;
6169 }
6170 }
6171 }
6172 for (ALL_LIST_ELEMENTS(bgp->group, node, nnode, group)) {
6173 FOREACH_AFI_SAFI (afi, safi) {
6174 filter = &group->conf->filter[afi][safi];
6175
6176 for (direct = FILTER_IN; direct < FILTER_MAX;
6177 direct++) {
6178 if (filter->aslist[direct].name)
6179 filter->aslist[direct]
6180 .aslist = as_list_lookup(
6181 filter->aslist[direct]
6182 .name);
6183 else
6184 filter->aslist[direct].aslist =
6185 NULL;
6186 }
6187 }
6188 }
6189 }
6190 }
6191
6192 static void peer_aslist_add(char *aslist_name)
6193 {
6194 peer_aslist_update(aslist_name);
6195 route_map_notify_dependencies(aslist_name, RMAP_EVENT_ASLIST_ADDED);
6196 }
6197
6198 static void peer_aslist_del(const char *aslist_name)
6199 {
6200 peer_aslist_update(aslist_name);
6201 route_map_notify_dependencies(aslist_name, RMAP_EVENT_ASLIST_DELETED);
6202 }
6203
6204
6205 int peer_route_map_set(struct peer *peer, afi_t afi, safi_t safi, int direct,
6206 const char *name, struct route_map *route_map)
6207 {
6208 struct peer *member;
6209 struct bgp_filter *filter;
6210 struct listnode *node, *nnode;
6211
6212 if (direct != RMAP_IN && direct != RMAP_OUT)
6213 return BGP_ERR_INVALID_VALUE;
6214
6215 /* Set configuration on peer. */
6216 filter = &peer->filter[afi][safi];
6217 if (filter->map[direct].name) {
6218 /* If the neighbor is configured with the same route-map
6219 * again then, ignore the duplicate configuration.
6220 */
6221 if (strcmp(filter->map[direct].name, name) == 0)
6222 return 0;
6223
6224 XFREE(MTYPE_BGP_FILTER_NAME, filter->map[direct].name);
6225 }
6226 route_map_counter_decrement(filter->map[direct].map);
6227 filter->map[direct].name = XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
6228 filter->map[direct].map = route_map;
6229 route_map_counter_increment(route_map);
6230
6231 /* Check if handling a regular peer. */
6232 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6233 /* Set override-flag and process peer route updates. */
6234 SET_FLAG(peer->filter_override[afi][safi][direct],
6235 PEER_FT_ROUTE_MAP);
6236 peer_on_policy_change(peer, afi, safi,
6237 (direct == RMAP_OUT) ? 1 : 0);
6238
6239 /* Skip peer-group mechanics for regular peers. */
6240 return 0;
6241 }
6242
6243 /*
6244 * Set configuration on all peer-group members, unless they are
6245 * explicitely overriding peer-group configuration.
6246 */
6247 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
6248 /* Skip peers with overridden configuration. */
6249 if (CHECK_FLAG(member->filter_override[afi][safi][direct],
6250 PEER_FT_ROUTE_MAP))
6251 continue;
6252
6253 /* Set configuration on peer-group member. */
6254 filter = &member->filter[afi][safi];
6255 if (filter->map[direct].name)
6256 XFREE(MTYPE_BGP_FILTER_NAME, filter->map[direct].name);
6257 route_map_counter_decrement(filter->map[direct].map);
6258 filter->map[direct].name = XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
6259 filter->map[direct].map = route_map;
6260 route_map_counter_increment(route_map);
6261
6262 /* Process peer route updates. */
6263 peer_on_policy_change(member, afi, safi,
6264 (direct == RMAP_OUT) ? 1 : 0);
6265 }
6266 return 0;
6267 }
6268
6269 /* Unset route-map from the peer. */
6270 int peer_route_map_unset(struct peer *peer, afi_t afi, safi_t safi, int direct)
6271 {
6272 struct peer *member;
6273 struct bgp_filter *filter;
6274 struct listnode *node, *nnode;
6275
6276 if (direct != RMAP_IN && direct != RMAP_OUT)
6277 return BGP_ERR_INVALID_VALUE;
6278
6279 /* Unset override-flag unconditionally. */
6280 UNSET_FLAG(peer->filter_override[afi][safi][direct], PEER_FT_ROUTE_MAP);
6281
6282 /* Inherit configuration from peer-group if peer is member. */
6283 if (peer_group_active(peer)) {
6284 PEER_STR_ATTR_INHERIT(peer, peer->group,
6285 filter[afi][safi].map[direct].name,
6286 MTYPE_BGP_FILTER_NAME);
6287 PEER_ATTR_INHERIT(peer, peer->group,
6288 filter[afi][safi].map[direct].map);
6289 } else {
6290 /* Otherwise remove configuration from peer. */
6291 filter = &peer->filter[afi][safi];
6292 if (filter->map[direct].name)
6293 XFREE(MTYPE_BGP_FILTER_NAME, filter->map[direct].name);
6294 route_map_counter_decrement(filter->map[direct].map);
6295 filter->map[direct].name = NULL;
6296 filter->map[direct].map = NULL;
6297 }
6298
6299 /* Check if handling a regular peer. */
6300 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6301 /* Process peer route updates. */
6302 peer_on_policy_change(peer, afi, safi,
6303 (direct == RMAP_OUT) ? 1 : 0);
6304
6305 /* Skip peer-group mechanics for regular peers. */
6306 return 0;
6307 }
6308
6309 /*
6310 * Remove configuration on all peer-group members, unless they are
6311 * explicitely overriding peer-group configuration.
6312 */
6313 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
6314 /* Skip peers with overridden configuration. */
6315 if (CHECK_FLAG(member->filter_override[afi][safi][direct],
6316 PEER_FT_ROUTE_MAP))
6317 continue;
6318
6319 /* Remove configuration on peer-group member. */
6320 filter = &member->filter[afi][safi];
6321 if (filter->map[direct].name)
6322 XFREE(MTYPE_BGP_FILTER_NAME, filter->map[direct].name);
6323 route_map_counter_decrement(filter->map[direct].map);
6324 filter->map[direct].name = NULL;
6325 filter->map[direct].map = NULL;
6326
6327 /* Process peer route updates. */
6328 peer_on_policy_change(member, afi, safi,
6329 (direct == RMAP_OUT) ? 1 : 0);
6330 }
6331
6332 return 0;
6333 }
6334
6335 /* Set unsuppress-map to the peer. */
6336 int peer_unsuppress_map_set(struct peer *peer, afi_t afi, safi_t safi,
6337 const char *name, struct route_map *route_map)
6338 {
6339 struct peer *member;
6340 struct bgp_filter *filter;
6341 struct listnode *node, *nnode;
6342
6343 /* Set configuration on peer. */
6344 filter = &peer->filter[afi][safi];
6345 if (filter->usmap.name)
6346 XFREE(MTYPE_BGP_FILTER_NAME, filter->usmap.name);
6347 route_map_counter_decrement(filter->usmap.map);
6348 filter->usmap.name = XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
6349 filter->usmap.map = route_map;
6350 route_map_counter_increment(route_map);
6351
6352 /* Check if handling a regular peer. */
6353 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6354 /* Set override-flag and process peer route updates. */
6355 SET_FLAG(peer->filter_override[afi][safi][0],
6356 PEER_FT_UNSUPPRESS_MAP);
6357 peer_on_policy_change(peer, afi, safi, 1);
6358
6359 /* Skip peer-group mechanics for regular peers. */
6360 return 0;
6361 }
6362
6363 /*
6364 * Set configuration on all peer-group members, unless they are
6365 * explicitely overriding peer-group configuration.
6366 */
6367 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
6368 /* Skip peers with overridden configuration. */
6369 if (CHECK_FLAG(member->filter_override[afi][safi][0],
6370 PEER_FT_UNSUPPRESS_MAP))
6371 continue;
6372
6373 /* Set configuration on peer-group member. */
6374 filter = &member->filter[afi][safi];
6375 if (filter->usmap.name)
6376 XFREE(MTYPE_BGP_FILTER_NAME, filter->usmap.name);
6377 route_map_counter_decrement(filter->usmap.map);
6378 filter->usmap.name = XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
6379 filter->usmap.map = route_map;
6380 route_map_counter_increment(route_map);
6381
6382 /* Process peer route updates. */
6383 peer_on_policy_change(member, afi, safi, 1);
6384 }
6385
6386 return 0;
6387 }
6388
6389 /* Unset route-map from the peer. */
6390 int peer_unsuppress_map_unset(struct peer *peer, afi_t afi, safi_t safi)
6391 {
6392 struct peer *member;
6393 struct bgp_filter *filter;
6394 struct listnode *node, *nnode;
6395
6396 /* Unset override-flag unconditionally. */
6397 UNSET_FLAG(peer->filter_override[afi][safi][0], PEER_FT_UNSUPPRESS_MAP);
6398
6399 /* Inherit configuration from peer-group if peer is member. */
6400 if (peer_group_active(peer)) {
6401 PEER_STR_ATTR_INHERIT(peer, peer->group,
6402 filter[afi][safi].usmap.name,
6403 MTYPE_BGP_FILTER_NAME);
6404 PEER_ATTR_INHERIT(peer, peer->group,
6405 filter[afi][safi].usmap.map);
6406 } else {
6407 /* Otherwise remove configuration from peer. */
6408 filter = &peer->filter[afi][safi];
6409 if (filter->usmap.name)
6410 XFREE(MTYPE_BGP_FILTER_NAME, filter->usmap.name);
6411 route_map_counter_decrement(filter->usmap.map);
6412 filter->usmap.name = NULL;
6413 filter->usmap.map = NULL;
6414 }
6415
6416 /* Check if handling a regular peer. */
6417 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6418 /* Process peer route updates. */
6419 peer_on_policy_change(peer, afi, safi, 1);
6420
6421 /* Skip peer-group mechanics for regular peers. */
6422 return 0;
6423 }
6424
6425 /*
6426 * Remove configuration on all peer-group members, unless they are
6427 * explicitely overriding peer-group configuration.
6428 */
6429 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
6430 /* Skip peers with overridden configuration. */
6431 if (CHECK_FLAG(member->filter_override[afi][safi][0],
6432 PEER_FT_UNSUPPRESS_MAP))
6433 continue;
6434
6435 /* Remove configuration on peer-group member. */
6436 filter = &member->filter[afi][safi];
6437 if (filter->usmap.name)
6438 XFREE(MTYPE_BGP_FILTER_NAME, filter->usmap.name);
6439 route_map_counter_decrement(filter->usmap.map);
6440 filter->usmap.name = NULL;
6441 filter->usmap.map = NULL;
6442
6443 /* Process peer route updates. */
6444 peer_on_policy_change(member, afi, safi, 1);
6445 }
6446
6447 return 0;
6448 }
6449
6450 int peer_maximum_prefix_set(struct peer *peer, afi_t afi, safi_t safi,
6451 uint32_t max, uint8_t threshold, int warning,
6452 uint16_t restart, bool force)
6453 {
6454 struct peer *member;
6455 struct listnode *node, *nnode;
6456
6457 /* Set flags and configuration on peer. */
6458 peer_af_flag_set(peer, afi, safi, PEER_FLAG_MAX_PREFIX);
6459
6460 if (force)
6461 peer_af_flag_set(peer, afi, safi, PEER_FLAG_MAX_PREFIX_FORCE);
6462 else
6463 peer_af_flag_unset(peer, afi, safi, PEER_FLAG_MAX_PREFIX_FORCE);
6464
6465 if (warning)
6466 peer_af_flag_set(peer, afi, safi, PEER_FLAG_MAX_PREFIX_WARNING);
6467 else
6468 peer_af_flag_unset(peer, afi, safi,
6469 PEER_FLAG_MAX_PREFIX_WARNING);
6470
6471 peer->pmax[afi][safi] = max;
6472 peer->pmax_threshold[afi][safi] = threshold;
6473 peer->pmax_restart[afi][safi] = restart;
6474
6475 /* Check if handling a regular peer. */
6476 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6477 /* Re-check if peer violates maximum-prefix. */
6478 if ((peer->status == Established) && (peer->afc[afi][safi]))
6479 bgp_maximum_prefix_overflow(peer, afi, safi, 1);
6480
6481 /* Skip peer-group mechanics for regular peers. */
6482 return 0;
6483 }
6484
6485 /*
6486 * Set flags and configuration on all peer-group members, unless they
6487 * are explicitely overriding peer-group configuration.
6488 */
6489 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
6490 /* Skip peers with overridden configuration. */
6491 if (CHECK_FLAG(member->af_flags_override[afi][safi],
6492 PEER_FLAG_MAX_PREFIX))
6493 continue;
6494
6495 /* Set flag and configuration on peer-group member. */
6496 member->pmax[afi][safi] = max;
6497 member->pmax_threshold[afi][safi] = threshold;
6498 member->pmax_restart[afi][safi] = restart;
6499
6500 if (force)
6501 SET_FLAG(member->af_flags[afi][safi],
6502 PEER_FLAG_MAX_PREFIX_FORCE);
6503 else
6504 UNSET_FLAG(member->af_flags[afi][safi],
6505 PEER_FLAG_MAX_PREFIX_FORCE);
6506
6507 if (warning)
6508 SET_FLAG(member->af_flags[afi][safi],
6509 PEER_FLAG_MAX_PREFIX_WARNING);
6510 else
6511 UNSET_FLAG(member->af_flags[afi][safi],
6512 PEER_FLAG_MAX_PREFIX_WARNING);
6513
6514 /* Re-check if peer violates maximum-prefix. */
6515 if ((member->status == Established) && (member->afc[afi][safi]))
6516 bgp_maximum_prefix_overflow(member, afi, safi, 1);
6517 }
6518
6519 return 0;
6520 }
6521
6522 int peer_maximum_prefix_unset(struct peer *peer, afi_t afi, safi_t safi)
6523 {
6524 /* Inherit configuration from peer-group if peer is member. */
6525 if (peer_group_active(peer)) {
6526 peer_af_flag_inherit(peer, afi, safi, PEER_FLAG_MAX_PREFIX);
6527 peer_af_flag_inherit(peer, afi, safi,
6528 PEER_FLAG_MAX_PREFIX_FORCE);
6529 peer_af_flag_inherit(peer, afi, safi,
6530 PEER_FLAG_MAX_PREFIX_WARNING);
6531 PEER_ATTR_INHERIT(peer, peer->group, pmax[afi][safi]);
6532 PEER_ATTR_INHERIT(peer, peer->group, pmax_threshold[afi][safi]);
6533 PEER_ATTR_INHERIT(peer, peer->group, pmax_restart[afi][safi]);
6534
6535 return 0;
6536 }
6537
6538 /* Remove flags and configuration from peer. */
6539 peer_af_flag_unset(peer, afi, safi, PEER_FLAG_MAX_PREFIX);
6540 peer_af_flag_unset(peer, afi, safi, PEER_FLAG_MAX_PREFIX_FORCE);
6541 peer_af_flag_unset(peer, afi, safi, PEER_FLAG_MAX_PREFIX_WARNING);
6542 peer->pmax[afi][safi] = 0;
6543 peer->pmax_threshold[afi][safi] = 0;
6544 peer->pmax_restart[afi][safi] = 0;
6545
6546 /*
6547 * Remove flags and configuration from all peer-group members, unless
6548 * they are explicitely overriding peer-group configuration.
6549 */
6550 if (CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6551 struct peer *member;
6552 struct listnode *node;
6553
6554 for (ALL_LIST_ELEMENTS_RO(peer->group->peer, node, member)) {
6555 /* Skip peers with overridden configuration. */
6556 if (CHECK_FLAG(member->af_flags_override[afi][safi],
6557 PEER_FLAG_MAX_PREFIX))
6558 continue;
6559
6560 /* Remove flag and configuration on peer-group member.
6561 */
6562 UNSET_FLAG(member->af_flags[afi][safi],
6563 PEER_FLAG_MAX_PREFIX);
6564 UNSET_FLAG(member->af_flags[afi][safi],
6565 PEER_FLAG_MAX_PREFIX_FORCE);
6566 UNSET_FLAG(member->af_flags[afi][safi],
6567 PEER_FLAG_MAX_PREFIX_WARNING);
6568 member->pmax[afi][safi] = 0;
6569 member->pmax_threshold[afi][safi] = 0;
6570 member->pmax_restart[afi][safi] = 0;
6571 }
6572 }
6573
6574 return 0;
6575 }
6576
6577 int is_ebgp_multihop_configured(struct peer *peer)
6578 {
6579 struct peer_group *group;
6580 struct listnode *node, *nnode;
6581 struct peer *peer1;
6582
6583 if (CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6584 group = peer->group;
6585 if ((peer_sort(peer) != BGP_PEER_IBGP)
6586 && (group->conf->ttl != BGP_DEFAULT_TTL))
6587 return 1;
6588
6589 for (ALL_LIST_ELEMENTS(group->peer, node, nnode, peer1)) {
6590 if ((peer_sort(peer1) != BGP_PEER_IBGP)
6591 && (peer1->ttl != BGP_DEFAULT_TTL))
6592 return 1;
6593 }
6594 } else {
6595 if ((peer_sort(peer) != BGP_PEER_IBGP)
6596 && (peer->ttl != BGP_DEFAULT_TTL))
6597 return 1;
6598 }
6599 return 0;
6600 }
6601
6602 /* Set # of hops between us and BGP peer. */
6603 int peer_ttl_security_hops_set(struct peer *peer, int gtsm_hops)
6604 {
6605 struct peer_group *group;
6606 struct listnode *node, *nnode;
6607 int ret;
6608
6609 zlog_debug("peer_ttl_security_hops_set: set gtsm_hops to %d for %s",
6610 gtsm_hops, peer->host);
6611
6612 /* We cannot configure ttl-security hops when ebgp-multihop is already
6613 set. For non peer-groups, the check is simple. For peer-groups,
6614 it's
6615 slightly messy, because we need to check both the peer-group
6616 structure
6617 and all peer-group members for any trace of ebgp-multihop
6618 configuration
6619 before actually applying the ttl-security rules. Cisco really made a
6620 mess of this configuration parameter, and OpenBGPD got it right.
6621 */
6622
6623 if ((peer->gtsm_hops == BGP_GTSM_HOPS_DISABLED)
6624 && (peer->sort != BGP_PEER_IBGP)) {
6625 if (is_ebgp_multihop_configured(peer))
6626 return BGP_ERR_NO_EBGP_MULTIHOP_WITH_TTLHACK;
6627
6628 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6629 peer->gtsm_hops = gtsm_hops;
6630
6631 /* Calling ebgp multihop also resets the session.
6632 * On restart, NHT will get setup correctly as will the
6633 * min & max ttls on the socket. The return value is
6634 * irrelevant.
6635 */
6636 ret = peer_ebgp_multihop_set(peer, MAXTTL);
6637
6638 if (ret != 0)
6639 return ret;
6640 } else {
6641 group = peer->group;
6642 for (ALL_LIST_ELEMENTS(group->peer, node, nnode,
6643 peer)) {
6644 peer->gtsm_hops = group->conf->gtsm_hops;
6645
6646 /* Calling ebgp multihop also resets the
6647 * session.
6648 * On restart, NHT will get setup correctly as
6649 * will the
6650 * min & max ttls on the socket. The return
6651 * value is
6652 * irrelevant.
6653 */
6654 peer_ebgp_multihop_set(peer, MAXTTL);
6655 }
6656 }
6657 } else {
6658 /* Post the first gtsm setup or if its ibgp, maxttl setting
6659 * isn't
6660 * necessary, just set the minttl.
6661 */
6662 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6663 peer->gtsm_hops = gtsm_hops;
6664
6665 if (peer->fd >= 0)
6666 sockopt_minttl(peer->su.sa.sa_family, peer->fd,
6667 MAXTTL + 1 - gtsm_hops);
6668 if ((peer->status < Established) && peer->doppelganger
6669 && (peer->doppelganger->fd >= 0))
6670 sockopt_minttl(peer->su.sa.sa_family,
6671 peer->doppelganger->fd,
6672 MAXTTL + 1 - gtsm_hops);
6673 } else {
6674 group = peer->group;
6675 for (ALL_LIST_ELEMENTS(group->peer, node, nnode,
6676 peer)) {
6677 peer->gtsm_hops = group->conf->gtsm_hops;
6678
6679 /* Change setting of existing peer
6680 * established then change value (may break
6681 * connectivity)
6682 * not established yet (teardown session and
6683 * restart)
6684 * no session then do nothing (will get
6685 * handled by next connection)
6686 */
6687 if (peer->fd >= 0
6688 && peer->gtsm_hops
6689 != BGP_GTSM_HOPS_DISABLED)
6690 sockopt_minttl(
6691 peer->su.sa.sa_family, peer->fd,
6692 MAXTTL + 1 - peer->gtsm_hops);
6693 if ((peer->status < Established)
6694 && peer->doppelganger
6695 && (peer->doppelganger->fd >= 0))
6696 sockopt_minttl(peer->su.sa.sa_family,
6697 peer->doppelganger->fd,
6698 MAXTTL + 1 - gtsm_hops);
6699 }
6700 }
6701 }
6702
6703 return 0;
6704 }
6705
6706 int peer_ttl_security_hops_unset(struct peer *peer)
6707 {
6708 struct peer_group *group;
6709 struct listnode *node, *nnode;
6710 int ret = 0;
6711
6712 zlog_debug("peer_ttl_security_hops_unset: set gtsm_hops to zero for %s",
6713 peer->host);
6714
6715 /* if a peer-group member, then reset to peer-group default rather than
6716 * 0 */
6717 if (peer_group_active(peer))
6718 peer->gtsm_hops = peer->group->conf->gtsm_hops;
6719 else
6720 peer->gtsm_hops = BGP_GTSM_HOPS_DISABLED;
6721
6722 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6723 /* Invoking ebgp_multihop_set will set the TTL back to the
6724 * original
6725 * value as well as restting the NHT and such. The session is
6726 * reset.
6727 */
6728 if (peer->sort == BGP_PEER_EBGP)
6729 ret = peer_ebgp_multihop_unset(peer);
6730 else {
6731 if (peer->fd >= 0)
6732 sockopt_minttl(peer->su.sa.sa_family, peer->fd,
6733 0);
6734
6735 if ((peer->status < Established) && peer->doppelganger
6736 && (peer->doppelganger->fd >= 0))
6737 sockopt_minttl(peer->su.sa.sa_family,
6738 peer->doppelganger->fd, 0);
6739 }
6740 } else {
6741 group = peer->group;
6742 for (ALL_LIST_ELEMENTS(group->peer, node, nnode, peer)) {
6743 peer->gtsm_hops = BGP_GTSM_HOPS_DISABLED;
6744 if (peer->sort == BGP_PEER_EBGP)
6745 ret = peer_ebgp_multihop_unset(peer);
6746 else {
6747 if (peer->fd >= 0)
6748 sockopt_minttl(peer->su.sa.sa_family,
6749 peer->fd, 0);
6750
6751 if ((peer->status < Established)
6752 && peer->doppelganger
6753 && (peer->doppelganger->fd >= 0))
6754 sockopt_minttl(peer->su.sa.sa_family,
6755 peer->doppelganger->fd,
6756 0);
6757 }
6758 }
6759 }
6760
6761 return ret;
6762 }
6763
6764 /*
6765 * If peer clear is invoked in a loop for all peers on the BGP instance,
6766 * it may end up freeing the doppelganger, and if this was the next node
6767 * to the current node, we would end up accessing the freed next node.
6768 * Pass along additional parameter which can be updated if next node
6769 * is freed; only required when walking the peer list on BGP instance.
6770 */
6771 int peer_clear(struct peer *peer, struct listnode **nnode)
6772 {
6773 if (!CHECK_FLAG(peer->flags, PEER_FLAG_SHUTDOWN)) {
6774 if (CHECK_FLAG(peer->sflags, PEER_STATUS_PREFIX_OVERFLOW)) {
6775 UNSET_FLAG(peer->sflags, PEER_STATUS_PREFIX_OVERFLOW);
6776 if (peer->t_pmax_restart) {
6777 BGP_TIMER_OFF(peer->t_pmax_restart);
6778 if (bgp_debug_neighbor_events(peer))
6779 zlog_debug(
6780 "%s Maximum-prefix restart timer canceled",
6781 peer->host);
6782 }
6783 BGP_EVENT_ADD(peer, BGP_Start);
6784 return 0;
6785 }
6786
6787 peer->v_start = BGP_INIT_START_TIMER;
6788 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status))
6789 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
6790 BGP_NOTIFY_CEASE_ADMIN_RESET);
6791 else
6792 bgp_session_reset_safe(peer, nnode);
6793 }
6794 return 0;
6795 }
6796
6797 int peer_clear_soft(struct peer *peer, afi_t afi, safi_t safi,
6798 enum bgp_clear_type stype)
6799 {
6800 struct peer_af *paf;
6801
6802 if (peer->status != Established)
6803 return 0;
6804
6805 if (!peer->afc[afi][safi])
6806 return BGP_ERR_AF_UNCONFIGURED;
6807
6808 peer->rtt = sockopt_tcp_rtt(peer->fd);
6809
6810 if (stype == BGP_CLEAR_SOFT_OUT || stype == BGP_CLEAR_SOFT_BOTH) {
6811 /* Clear the "neighbor x.x.x.x default-originate" flag */
6812 paf = peer_af_find(peer, afi, safi);
6813 if (paf && paf->subgroup
6814 && CHECK_FLAG(paf->subgroup->sflags,
6815 SUBGRP_STATUS_DEFAULT_ORIGINATE))
6816 UNSET_FLAG(paf->subgroup->sflags,
6817 SUBGRP_STATUS_DEFAULT_ORIGINATE);
6818
6819 bgp_announce_route(peer, afi, safi);
6820 }
6821
6822 if (stype == BGP_CLEAR_SOFT_IN_ORF_PREFIX) {
6823 if (CHECK_FLAG(peer->af_cap[afi][safi],
6824 PEER_CAP_ORF_PREFIX_SM_ADV)
6825 && (CHECK_FLAG(peer->af_cap[afi][safi],
6826 PEER_CAP_ORF_PREFIX_RM_RCV)
6827 || CHECK_FLAG(peer->af_cap[afi][safi],
6828 PEER_CAP_ORF_PREFIX_RM_OLD_RCV))) {
6829 struct bgp_filter *filter = &peer->filter[afi][safi];
6830 uint8_t prefix_type;
6831
6832 if (CHECK_FLAG(peer->af_cap[afi][safi],
6833 PEER_CAP_ORF_PREFIX_RM_RCV))
6834 prefix_type = ORF_TYPE_PREFIX;
6835 else
6836 prefix_type = ORF_TYPE_PREFIX_OLD;
6837
6838 if (filter->plist[FILTER_IN].plist) {
6839 if (CHECK_FLAG(peer->af_sflags[afi][safi],
6840 PEER_STATUS_ORF_PREFIX_SEND))
6841 bgp_route_refresh_send(
6842 peer, afi, safi, prefix_type,
6843 REFRESH_DEFER, 1);
6844 bgp_route_refresh_send(peer, afi, safi,
6845 prefix_type,
6846 REFRESH_IMMEDIATE, 0);
6847 } else {
6848 if (CHECK_FLAG(peer->af_sflags[afi][safi],
6849 PEER_STATUS_ORF_PREFIX_SEND))
6850 bgp_route_refresh_send(
6851 peer, afi, safi, prefix_type,
6852 REFRESH_IMMEDIATE, 1);
6853 else
6854 bgp_route_refresh_send(peer, afi, safi,
6855 0, 0, 0);
6856 }
6857 return 0;
6858 }
6859 }
6860
6861 if (stype == BGP_CLEAR_SOFT_IN || stype == BGP_CLEAR_SOFT_BOTH
6862 || stype == BGP_CLEAR_SOFT_IN_ORF_PREFIX) {
6863 /* If neighbor has soft reconfiguration inbound flag.
6864 Use Adj-RIB-In database. */
6865 if (CHECK_FLAG(peer->af_flags[afi][safi],
6866 PEER_FLAG_SOFT_RECONFIG))
6867 bgp_soft_reconfig_in(peer, afi, safi);
6868 else {
6869 /* If neighbor has route refresh capability, send route
6870 refresh
6871 message to the peer. */
6872 if (CHECK_FLAG(peer->cap, PEER_CAP_REFRESH_OLD_RCV)
6873 || CHECK_FLAG(peer->cap, PEER_CAP_REFRESH_NEW_RCV))
6874 bgp_route_refresh_send(peer, afi, safi, 0, 0,
6875 0);
6876 else
6877 return BGP_ERR_SOFT_RECONFIG_UNCONFIGURED;
6878 }
6879 }
6880 return 0;
6881 }
6882
6883 /* Display peer uptime.*/
6884 char *peer_uptime(time_t uptime2, char *buf, size_t len, bool use_json,
6885 json_object *json)
6886 {
6887 time_t uptime1, epoch_tbuf;
6888 struct tm tm;
6889
6890 /* If there is no connection has been done before print `never'. */
6891 if (uptime2 == 0) {
6892 if (use_json) {
6893 json_object_string_add(json, "peerUptime", "never");
6894 json_object_int_add(json, "peerUptimeMsec", 0);
6895 } else
6896 snprintf(buf, len, "never");
6897 return buf;
6898 }
6899
6900 /* Get current time. */
6901 uptime1 = bgp_clock();
6902 uptime1 -= uptime2;
6903 gmtime_r(&uptime1, &tm);
6904
6905 if (uptime1 < ONE_DAY_SECOND)
6906 snprintf(buf, len, "%02d:%02d:%02d", tm.tm_hour, tm.tm_min,
6907 tm.tm_sec);
6908 else if (uptime1 < ONE_WEEK_SECOND)
6909 snprintf(buf, len, "%dd%02dh%02dm", tm.tm_yday, tm.tm_hour,
6910 tm.tm_min);
6911 else if (uptime1 < ONE_YEAR_SECOND)
6912 snprintf(buf, len, "%02dw%dd%02dh", tm.tm_yday / 7,
6913 tm.tm_yday - ((tm.tm_yday / 7) * 7), tm.tm_hour);
6914 else
6915 snprintf(buf, len, "%02dy%02dw%dd", tm.tm_year - 70,
6916 tm.tm_yday / 7,
6917 tm.tm_yday - ((tm.tm_yday / 7) * 7));
6918
6919 if (use_json) {
6920 epoch_tbuf = time(NULL) - uptime1;
6921 json_object_string_add(json, "peerUptime", buf);
6922 json_object_int_add(json, "peerUptimeMsec", uptime1 * 1000);
6923 json_object_int_add(json, "peerUptimeEstablishedEpoch",
6924 epoch_tbuf);
6925 }
6926
6927 return buf;
6928 }
6929
6930 void bgp_master_init(struct thread_master *master, const int buffer_size)
6931 {
6932 qobj_init();
6933
6934 memset(&bgp_master, 0, sizeof(struct bgp_master));
6935
6936 bm = &bgp_master;
6937 bm->bgp = list_new();
6938 bm->listen_sockets = list_new();
6939 bm->port = BGP_PORT_DEFAULT;
6940 bm->master = master;
6941 bm->start_time = bgp_clock();
6942 bm->t_rmap_update = NULL;
6943 bm->rmap_update_timer = RMAP_DEFAULT_UPDATE_TIMER;
6944 bm->terminating = false;
6945 bm->socket_buffer = buffer_size;
6946
6947 bgp_process_queue_init();
6948
6949 bgp_mac_init();
6950 /* init the rd id space.
6951 assign 0th index in the bitfield,
6952 so that we start with id 1
6953 */
6954 bf_init(bm->rd_idspace, UINT16_MAX);
6955 bf_assign_zero_index(bm->rd_idspace);
6956
6957 /* mpls label dynamic allocation pool */
6958 bgp_lp_init(bm->master, &bm->labelpool);
6959
6960 bgp_evpn_mh_init();
6961 QOBJ_REG(bm, bgp_master);
6962 }
6963
6964 /*
6965 * Free up connected routes and interfaces for a BGP instance. Invoked upon
6966 * instance delete (non-default only) or BGP exit.
6967 */
6968 static void bgp_if_finish(struct bgp *bgp)
6969 {
6970 struct vrf *vrf;
6971 struct interface *ifp;
6972
6973 vrf = bgp_vrf_lookup_by_instance_type(bgp);
6974
6975 if (bgp->inst_type == BGP_INSTANCE_TYPE_VIEW || !vrf)
6976 return;
6977
6978 FOR_ALL_INTERFACES (vrf, ifp) {
6979 struct listnode *c_node, *c_nnode;
6980 struct connected *c;
6981
6982 for (ALL_LIST_ELEMENTS(ifp->connected, c_node, c_nnode, c))
6983 bgp_connected_delete(bgp, c);
6984 }
6985 }
6986
6987 static void bgp_viewvrf_autocomplete(vector comps, struct cmd_token *token)
6988 {
6989 struct vrf *vrf = NULL;
6990 struct listnode *next;
6991 struct bgp *bgp;
6992
6993 RB_FOREACH (vrf, vrf_name_head, &vrfs_by_name)
6994 vector_set(comps, XSTRDUP(MTYPE_COMPLETION, vrf->name));
6995
6996 for (ALL_LIST_ELEMENTS_RO(bm->bgp, next, bgp)) {
6997 if (bgp->inst_type != BGP_INSTANCE_TYPE_VIEW)
6998 continue;
6999
7000 vector_set(comps, XSTRDUP(MTYPE_COMPLETION, bgp->name));
7001 }
7002 }
7003
7004 static void bgp_instasn_autocomplete(vector comps, struct cmd_token *token)
7005 {
7006 struct listnode *next, *next2;
7007 struct bgp *bgp, *bgp2;
7008 char buf[11];
7009
7010 for (ALL_LIST_ELEMENTS_RO(bm->bgp, next, bgp)) {
7011 /* deduplicate */
7012 for (ALL_LIST_ELEMENTS_RO(bm->bgp, next2, bgp2)) {
7013 if (bgp2->as == bgp->as)
7014 break;
7015 if (bgp2 == bgp)
7016 break;
7017 }
7018 if (bgp2 != bgp)
7019 continue;
7020
7021 snprintf(buf, sizeof(buf), "%u", bgp->as);
7022 vector_set(comps, XSTRDUP(MTYPE_COMPLETION, buf));
7023 }
7024 }
7025
7026 static const struct cmd_variable_handler bgp_viewvrf_var_handlers[] = {
7027 {.tokenname = "VIEWVRFNAME", .completions = bgp_viewvrf_autocomplete},
7028 {.varname = "instasn", .completions = bgp_instasn_autocomplete},
7029 {.completions = NULL},
7030 };
7031
7032 struct frr_pthread *bgp_pth_io;
7033 struct frr_pthread *bgp_pth_ka;
7034
7035 static void bgp_pthreads_init(void)
7036 {
7037 assert(!bgp_pth_io);
7038 assert(!bgp_pth_ka);
7039
7040 struct frr_pthread_attr io = {
7041 .start = frr_pthread_attr_default.start,
7042 .stop = frr_pthread_attr_default.stop,
7043 };
7044 struct frr_pthread_attr ka = {
7045 .start = bgp_keepalives_start,
7046 .stop = bgp_keepalives_stop,
7047 };
7048 bgp_pth_io = frr_pthread_new(&io, "BGP I/O thread", "bgpd_io");
7049 bgp_pth_ka = frr_pthread_new(&ka, "BGP Keepalives thread", "bgpd_ka");
7050 }
7051
7052 void bgp_pthreads_run(void)
7053 {
7054 frr_pthread_run(bgp_pth_io, NULL);
7055 frr_pthread_run(bgp_pth_ka, NULL);
7056
7057 /* Wait until threads are ready. */
7058 frr_pthread_wait_running(bgp_pth_io);
7059 frr_pthread_wait_running(bgp_pth_ka);
7060 }
7061
7062 void bgp_pthreads_finish(void)
7063 {
7064 frr_pthread_stop_all();
7065 }
7066
7067 void bgp_init(unsigned short instance)
7068 {
7069
7070 /* allocates some vital data structures used by peer commands in
7071 * vty_init */
7072
7073 /* pre-init pthreads */
7074 bgp_pthreads_init();
7075
7076 /* Init zebra. */
7077 bgp_zebra_init(bm->master, instance);
7078
7079 #ifdef ENABLE_BGP_VNC
7080 vnc_zebra_init(bm->master);
7081 #endif
7082
7083 /* BGP VTY commands installation. */
7084 bgp_vty_init();
7085
7086 /* BGP inits. */
7087 bgp_attr_init();
7088 bgp_debug_init();
7089 bgp_dump_init();
7090 bgp_route_init();
7091 bgp_route_map_init();
7092 bgp_scan_vty_init();
7093 bgp_mplsvpn_init();
7094 #ifdef ENABLE_BGP_VNC
7095 rfapi_init();
7096 #endif
7097 bgp_ethernetvpn_init();
7098 bgp_flowspec_vty_init();
7099
7100 /* Access list initialize. */
7101 access_list_init();
7102 access_list_add_hook(peer_distribute_update);
7103 access_list_delete_hook(peer_distribute_update);
7104
7105 /* Filter list initialize. */
7106 bgp_filter_init();
7107 as_list_add_hook(peer_aslist_add);
7108 as_list_delete_hook(peer_aslist_del);
7109
7110 /* Prefix list initialize.*/
7111 prefix_list_init();
7112 prefix_list_add_hook(peer_prefix_list_update);
7113 prefix_list_delete_hook(peer_prefix_list_update);
7114
7115 /* Community list initialize. */
7116 bgp_clist = community_list_init();
7117
7118 /* BFD init */
7119 bgp_bfd_init();
7120
7121 cmd_variable_handler_register(bgp_viewvrf_var_handlers);
7122 }
7123
7124 void bgp_terminate(void)
7125 {
7126 struct bgp *bgp;
7127 struct peer *peer;
7128 struct listnode *node, *nnode;
7129 struct listnode *mnode, *mnnode;
7130
7131 QOBJ_UNREG(bm);
7132
7133 /* Close the listener sockets first as this prevents peers from
7134 * attempting
7135 * to reconnect on receiving the peer unconfig message. In the presence
7136 * of a large number of peers this will ensure that no peer is left with
7137 * a dangling connection
7138 */
7139 /* reverse bgp_master_init */
7140 bgp_close();
7141
7142 if (bm->listen_sockets)
7143 list_delete(&bm->listen_sockets);
7144
7145 for (ALL_LIST_ELEMENTS(bm->bgp, mnode, mnnode, bgp))
7146 for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer))
7147 if (peer->status == Established
7148 || peer->status == OpenSent
7149 || peer->status == OpenConfirm)
7150 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
7151 BGP_NOTIFY_CEASE_PEER_UNCONFIG);
7152
7153 if (bm->process_main_queue)
7154 work_queue_free_and_null(&bm->process_main_queue);
7155
7156 if (bm->t_rmap_update)
7157 BGP_TIMER_OFF(bm->t_rmap_update);
7158
7159 bgp_mac_finish();
7160 bgp_evpn_mh_finish();
7161 }
7162
7163 struct peer *peer_lookup_in_view(struct vty *vty, struct bgp *bgp,
7164 const char *ip_str, bool use_json)
7165 {
7166 int ret;
7167 struct peer *peer;
7168 union sockunion su;
7169
7170 /* Get peer sockunion. */
7171 ret = str2sockunion(ip_str, &su);
7172 if (ret < 0) {
7173 peer = peer_lookup_by_conf_if(bgp, ip_str);
7174 if (!peer) {
7175 peer = peer_lookup_by_hostname(bgp, ip_str);
7176
7177 if (!peer) {
7178 if (use_json) {
7179 json_object *json_no = NULL;
7180 json_no = json_object_new_object();
7181 json_object_string_add(
7182 json_no,
7183 "malformedAddressOrName",
7184 ip_str);
7185 vty_out(vty, "%s\n",
7186 json_object_to_json_string_ext(
7187 json_no,
7188 JSON_C_TO_STRING_PRETTY));
7189 json_object_free(json_no);
7190 } else
7191 vty_out(vty,
7192 "%% Malformed address or name: %s\n",
7193 ip_str);
7194 return NULL;
7195 }
7196 }
7197 return peer;
7198 }
7199
7200 /* Peer structure lookup. */
7201 peer = peer_lookup(bgp, &su);
7202 if (!peer) {
7203 if (use_json) {
7204 json_object *json_no = NULL;
7205 json_no = json_object_new_object();
7206 json_object_string_add(json_no, "warning",
7207 "No such neighbor in this view/vrf");
7208 vty_out(vty, "%s\n",
7209 json_object_to_json_string_ext(
7210 json_no, JSON_C_TO_STRING_PRETTY));
7211 json_object_free(json_no);
7212 } else
7213 vty_out(vty, "No such neighbor in this view/vrf\n");
7214 return NULL;
7215 }
7216
7217 return peer;
7218 }
7219
7220 void bgp_gr_apply_running_config(void)
7221 {
7222 struct peer *peer = NULL;
7223 struct bgp *bgp = NULL;
7224 struct listnode *node, *nnode;
7225 bool gr_router_detected = false;
7226
7227 if (BGP_DEBUG(graceful_restart, GRACEFUL_RESTART))
7228 zlog_debug("[BGP_GR] %s called !", __func__);
7229
7230 for (ALL_LIST_ELEMENTS(bm->bgp, node, nnode, bgp)) {
7231 for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) {
7232 bgp_peer_gr_flags_update(peer);
7233 if (CHECK_FLAG(peer->flags, PEER_FLAG_GRACEFUL_RESTART))
7234 gr_router_detected = true;
7235 }
7236
7237 if (gr_router_detected
7238 && bgp->present_zebra_gr_state == ZEBRA_GR_DISABLE) {
7239 bgp_zebra_send_capabilities(bgp, true);
7240 } else if (!gr_router_detected
7241 && bgp->present_zebra_gr_state == ZEBRA_GR_ENABLE) {
7242 bgp_zebra_send_capabilities(bgp, false);
7243 }
7244
7245 gr_router_detected = false;
7246 }
7247 }
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