]> git.proxmox.com Git - mirror_frr.git/blob - bgpd/bgpd.c
projects / mirror_frr.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge pull request #6987 from Niral-Networks/acl_fix
[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 /* Enable global administrative shutdown of all peers of BGP instance */
4024 void bgp_shutdown_enable(struct bgp *bgp, const char *msg)
4025 {
4026 struct peer *peer;
4027 struct listnode *node;
4028
4029 /* do nothing if already shut down */
4030 if (CHECK_FLAG(bgp->flags, BGP_FLAG_SHUTDOWN))
4031 return;
4032
4033 /* informational log message */
4034 zlog_info("Enabled administrative shutdown on BGP instance AS %u",
4035 bgp->as);
4036
4037 /* iterate through peers of BGP instance */
4038 for (ALL_LIST_ELEMENTS_RO(bgp->peer, node, peer)) {
4039 /* continue, if peer is already in administrative shutdown. */
4040 if (CHECK_FLAG(peer->flags, PEER_FLAG_SHUTDOWN))
4041 continue;
4042
4043 /* send a RFC 4486 notification message if necessary */
4044 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status)) {
4045 if (msg)
4046 bgp_notify_send_with_data(
4047 peer, BGP_NOTIFY_CEASE,
4048 BGP_NOTIFY_CEASE_ADMIN_SHUTDOWN,
4049 (uint8_t *)(msg), strlen(msg));
4050 else
4051 bgp_notify_send(
4052 peer, BGP_NOTIFY_CEASE,
4053 BGP_NOTIFY_CEASE_ADMIN_SHUTDOWN);
4054 }
4055
4056 /* reset start timer to initial value */
4057 peer->v_start = BGP_INIT_START_TIMER;
4058
4059 /* trigger a RFC 4271 ManualStop event */
4060 BGP_EVENT_ADD(peer, BGP_Stop);
4061 }
4062
4063 /* set the BGP instances shutdown flag */
4064 SET_FLAG(bgp->flags, BGP_FLAG_SHUTDOWN);
4065 }
4066
4067 /* Disable global administrative shutdown of all peers of BGP instance */
4068 void bgp_shutdown_disable(struct bgp *bgp)
4069 {
4070 /* do nothing if not shut down. */
4071 if (!CHECK_FLAG(bgp->flags, BGP_FLAG_SHUTDOWN))
4072 return;
4073
4074 /* informational log message */
4075 zlog_info("Disabled administrative shutdown on BGP instance AS %u",
4076 bgp->as);
4077
4078 /* clear the BGP instances shutdown flag */
4079 UNSET_FLAG(bgp->flags, BGP_FLAG_SHUTDOWN);
4080 }
4081
4082 /* Change specified peer flag. */
4083 static int peer_flag_modify(struct peer *peer, uint32_t flag, int set)
4084 {
4085 int found;
4086 int size;
4087 bool invert, member_invert;
4088 struct peer *member;
4089 struct listnode *node, *nnode;
4090 struct peer_flag_action action;
4091
4092 memset(&action, 0, sizeof(struct peer_flag_action));
4093 size = sizeof(peer_flag_action_list) / sizeof(struct peer_flag_action);
4094
4095 invert = CHECK_FLAG(peer->flags_invert, flag);
4096 found = peer_flag_action_set(peer_flag_action_list, size, &action,
4097 flag);
4098
4099 /* Abort if no flag action exists. */
4100 if (!found)
4101 return BGP_ERR_INVALID_FLAG;
4102
4103 /* Check for flag conflict: STRICT_CAP_MATCH && OVERRIDE_CAPABILITY */
4104 if (set && CHECK_FLAG(peer->flags | flag, PEER_FLAG_STRICT_CAP_MATCH)
4105 && CHECK_FLAG(peer->flags | flag, PEER_FLAG_OVERRIDE_CAPABILITY))
4106 return BGP_ERR_PEER_FLAG_CONFLICT;
4107
4108 /* Handle flag updates where desired state matches current state. */
4109 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4110 if (set && CHECK_FLAG(peer->flags, flag)) {
4111 COND_FLAG(peer->flags_override, flag, !invert);
4112 return 0;
4113 }
4114
4115 if (!set && !CHECK_FLAG(peer->flags, flag)) {
4116 COND_FLAG(peer->flags_override, flag, invert);
4117 return 0;
4118 }
4119 }
4120
4121 /* Inherit from peer-group or set/unset flags accordingly. */
4122 if (peer_group_active(peer) && set == invert)
4123 peer_flag_inherit(peer, flag);
4124 else
4125 COND_FLAG(peer->flags, flag, set);
4126
4127 /* Check if handling a regular peer. */
4128 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4129 /* Update flag override state accordingly. */
4130 COND_FLAG(peer->flags_override, flag, set != invert);
4131
4132 /*
4133 * For the extended next-hop encoding flag we need to turn RAs
4134 * on if flag is being set, but only turn RAs off if the flag
4135 * is being unset on this peer and if this peer is a member of a
4136 * peer-group, the peer-group also doesn't have the flag set.
4137 */
4138 if (flag == PEER_FLAG_CAPABILITY_ENHE) {
4139 if (set) {
4140 bgp_zebra_initiate_radv(peer->bgp, peer);
4141 } else if (peer_group_active(peer)) {
4142 if (!CHECK_FLAG(peer->group->conf->flags, flag))
4143 bgp_zebra_terminate_radv(peer->bgp,
4144 peer);
4145 } else
4146 bgp_zebra_terminate_radv(peer->bgp, peer);
4147 }
4148
4149 /* Execute flag action on peer. */
4150 if (action.type == peer_change_reset)
4151 peer_flag_modify_action(peer, flag);
4152
4153 /* Skip peer-group mechanics for regular peers. */
4154 return 0;
4155 }
4156
4157 /*
4158 * Update peer-group members, unless they are explicitely overriding
4159 * peer-group configuration.
4160 */
4161 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
4162 /* Skip peers with overridden configuration. */
4163 if (CHECK_FLAG(member->flags_override, flag))
4164 continue;
4165
4166 /* Check if only member without group is inverted. */
4167 member_invert =
4168 CHECK_FLAG(member->flags_invert, flag) && !invert;
4169
4170 /* Skip peers with equivalent configuration. */
4171 if (set != member_invert && CHECK_FLAG(member->flags, flag))
4172 continue;
4173
4174 if (set == member_invert && !CHECK_FLAG(member->flags, flag))
4175 continue;
4176
4177 /* Update flag on peer-group member. */
4178 COND_FLAG(member->flags, flag, set != member_invert);
4179
4180 if (flag == PEER_FLAG_CAPABILITY_ENHE)
4181 set ? bgp_zebra_initiate_radv(member->bgp, member)
4182 : bgp_zebra_terminate_radv(member->bgp, member);
4183
4184 /* Execute flag action on peer-group member. */
4185 if (action.type == peer_change_reset)
4186 peer_flag_modify_action(member, flag);
4187 }
4188
4189 return 0;
4190 }
4191
4192 int peer_flag_set(struct peer *peer, uint32_t flag)
4193 {
4194 return peer_flag_modify(peer, flag, 1);
4195 }
4196
4197 int peer_flag_unset(struct peer *peer, uint32_t flag)
4198 {
4199 return peer_flag_modify(peer, flag, 0);
4200 }
4201
4202 static int peer_af_flag_modify(struct peer *peer, afi_t afi, safi_t safi,
4203 uint32_t flag, bool set)
4204 {
4205 int found;
4206 int size;
4207 bool invert, member_invert;
4208 struct peer *member;
4209 struct listnode *node, *nnode;
4210 struct peer_flag_action action;
4211 bgp_peer_sort_t ptype;
4212
4213 memset(&action, 0, sizeof(struct peer_flag_action));
4214 size = sizeof(peer_af_flag_action_list)
4215 / sizeof(struct peer_flag_action);
4216
4217 invert = CHECK_FLAG(peer->af_flags_invert[afi][safi], flag);
4218 found = peer_flag_action_set(peer_af_flag_action_list, size, &action,
4219 flag);
4220
4221 /* Abort if flag action exists. */
4222 if (!found)
4223 return BGP_ERR_INVALID_FLAG;
4224
4225 ptype = peer_sort(peer);
4226 /* Special check for reflector client. */
4227 if (flag & PEER_FLAG_REFLECTOR_CLIENT && ptype != BGP_PEER_IBGP)
4228 return BGP_ERR_NOT_INTERNAL_PEER;
4229
4230 /* Special check for remove-private-AS. */
4231 if (flag & PEER_FLAG_REMOVE_PRIVATE_AS && ptype == BGP_PEER_IBGP)
4232 return BGP_ERR_REMOVE_PRIVATE_AS;
4233
4234 /* as-override is not allowed for IBGP peers */
4235 if (flag & PEER_FLAG_AS_OVERRIDE && ptype == BGP_PEER_IBGP)
4236 return BGP_ERR_AS_OVERRIDE;
4237
4238 /* Handle flag updates where desired state matches current state. */
4239 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4240 if (set && CHECK_FLAG(peer->af_flags[afi][safi], flag)) {
4241 COND_FLAG(peer->af_flags_override[afi][safi], flag,
4242 !invert);
4243 return 0;
4244 }
4245
4246 if (!set && !CHECK_FLAG(peer->af_flags[afi][safi], flag)) {
4247 COND_FLAG(peer->af_flags_override[afi][safi], flag,
4248 invert);
4249 return 0;
4250 }
4251 }
4252
4253 /*
4254 * For EVPN we implicitly set the NEXTHOP_UNCHANGED flag,
4255 * if we are setting/unsetting flags which conflict with this flag
4256 * handle accordingly
4257 */
4258 if (afi == AFI_L2VPN && safi == SAFI_EVPN) {
4259 if (set) {
4260
4261 /*
4262 * if we are setting NEXTHOP_SELF, we need to unset the
4263 * NEXTHOP_UNCHANGED flag
4264 */
4265 if (CHECK_FLAG(flag, PEER_FLAG_NEXTHOP_SELF) ||
4266 CHECK_FLAG(flag, PEER_FLAG_FORCE_NEXTHOP_SELF))
4267 UNSET_FLAG(peer->af_flags[afi][safi],
4268 PEER_FLAG_NEXTHOP_UNCHANGED);
4269 } else {
4270
4271 /*
4272 * if we are unsetting NEXTHOP_SELF, we need to set the
4273 * NEXTHOP_UNCHANGED flag to reset the defaults for EVPN
4274 */
4275 if (CHECK_FLAG(flag, PEER_FLAG_NEXTHOP_SELF) ||
4276 CHECK_FLAG(flag, PEER_FLAG_FORCE_NEXTHOP_SELF))
4277 SET_FLAG(peer->af_flags[afi][safi],
4278 PEER_FLAG_NEXTHOP_UNCHANGED);
4279 }
4280 }
4281
4282 /*
4283 * If the peer is a route server client let's not
4284 * muck with the nexthop on the way out the door
4285 */
4286 if (flag & PEER_FLAG_RSERVER_CLIENT) {
4287 if (set)
4288 SET_FLAG(peer->af_flags[afi][safi],
4289 PEER_FLAG_NEXTHOP_UNCHANGED);
4290 else
4291 UNSET_FLAG(peer->af_flags[afi][safi],
4292 PEER_FLAG_NEXTHOP_UNCHANGED);
4293 }
4294
4295 /* Inherit from peer-group or set/unset flags accordingly. */
4296 if (peer_group_active(peer) && set == invert)
4297 peer_af_flag_inherit(peer, afi, safi, flag);
4298 else
4299 COND_FLAG(peer->af_flags[afi][safi], flag, set);
4300
4301 /* Execute action when peer is established. */
4302 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)
4303 && peer->status == Established) {
4304 if (!set && flag == PEER_FLAG_SOFT_RECONFIG)
4305 bgp_clear_adj_in(peer, afi, safi);
4306 else {
4307 if (flag == PEER_FLAG_REFLECTOR_CLIENT)
4308 peer->last_reset = PEER_DOWN_RR_CLIENT_CHANGE;
4309 else if (flag == PEER_FLAG_RSERVER_CLIENT)
4310 peer->last_reset = PEER_DOWN_RS_CLIENT_CHANGE;
4311 else if (flag == PEER_FLAG_ORF_PREFIX_SM)
4312 peer->last_reset = PEER_DOWN_CAPABILITY_CHANGE;
4313 else if (flag == PEER_FLAG_ORF_PREFIX_RM)
4314 peer->last_reset = PEER_DOWN_CAPABILITY_CHANGE;
4315
4316 peer_change_action(peer, afi, safi, action.type);
4317 }
4318 }
4319
4320 /* Check if handling a regular peer. */
4321 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4322 COND_FLAG(peer->af_flags_override[afi][safi], flag,
4323 set != invert);
4324 } else {
4325 /*
4326 * Update peer-group members, unless they are explicitely
4327 * overriding peer-group configuration.
4328 */
4329 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode,
4330 member)) {
4331 /* Skip peers with overridden configuration. */
4332 if (CHECK_FLAG(member->af_flags_override[afi][safi],
4333 flag))
4334 continue;
4335
4336 /* Check if only member without group is inverted. */
4337 member_invert =
4338 CHECK_FLAG(member->af_flags_invert[afi][safi],
4339 flag)
4340 && !invert;
4341
4342 /* Skip peers with equivalent configuration. */
4343 if (set != member_invert
4344 && CHECK_FLAG(member->af_flags[afi][safi], flag))
4345 continue;
4346
4347 if (set == member_invert
4348 && !CHECK_FLAG(member->af_flags[afi][safi], flag))
4349 continue;
4350
4351 /* Update flag on peer-group member. */
4352 COND_FLAG(member->af_flags[afi][safi], flag,
4353 set != member_invert);
4354
4355 /* Execute flag action on peer-group member. */
4356 if (member->status == Established) {
4357 if (!set && flag == PEER_FLAG_SOFT_RECONFIG)
4358 bgp_clear_adj_in(member, afi, safi);
4359 else {
4360 if (flag == PEER_FLAG_REFLECTOR_CLIENT)
4361 member->last_reset =
4362 PEER_DOWN_RR_CLIENT_CHANGE;
4363 else if (flag
4364 == PEER_FLAG_RSERVER_CLIENT)
4365 member->last_reset =
4366 PEER_DOWN_RS_CLIENT_CHANGE;
4367 else if (flag
4368 == PEER_FLAG_ORF_PREFIX_SM)
4369 member->last_reset =
4370 PEER_DOWN_CAPABILITY_CHANGE;
4371 else if (flag
4372 == PEER_FLAG_ORF_PREFIX_RM)
4373 member->last_reset =
4374 PEER_DOWN_CAPABILITY_CHANGE;
4375
4376 peer_change_action(member, afi, safi,
4377 action.type);
4378 }
4379 }
4380 }
4381 }
4382
4383 return 0;
4384 }
4385
4386 int peer_af_flag_set(struct peer *peer, afi_t afi, safi_t safi, uint32_t flag)
4387 {
4388 return peer_af_flag_modify(peer, afi, safi, flag, 1);
4389 }
4390
4391 int peer_af_flag_unset(struct peer *peer, afi_t afi, safi_t safi, uint32_t flag)
4392 {
4393 return peer_af_flag_modify(peer, afi, safi, flag, 0);
4394 }
4395
4396
4397 void peer_tx_shutdown_message_set(struct peer *peer, const char *msg)
4398 {
4399 XFREE(MTYPE_PEER_TX_SHUTDOWN_MSG, peer->tx_shutdown_message);
4400 peer->tx_shutdown_message =
4401 msg ? XSTRDUP(MTYPE_PEER_TX_SHUTDOWN_MSG, msg) : NULL;
4402 }
4403
4404 void peer_tx_shutdown_message_unset(struct peer *peer)
4405 {
4406 XFREE(MTYPE_PEER_TX_SHUTDOWN_MSG, peer->tx_shutdown_message);
4407 }
4408
4409
4410 /* EBGP multihop configuration. */
4411 int peer_ebgp_multihop_set(struct peer *peer, int ttl)
4412 {
4413 struct peer_group *group;
4414 struct listnode *node, *nnode;
4415 struct peer *peer1;
4416
4417 if (peer->sort == BGP_PEER_IBGP || peer->conf_if)
4418 return 0;
4419
4420 /* see comment in peer_ttl_security_hops_set() */
4421 if (ttl != MAXTTL) {
4422 if (CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4423 group = peer->group;
4424 if (group->conf->gtsm_hops != BGP_GTSM_HOPS_DISABLED)
4425 return BGP_ERR_NO_EBGP_MULTIHOP_WITH_TTLHACK;
4426
4427 for (ALL_LIST_ELEMENTS(group->peer, node, nnode,
4428 peer1)) {
4429 if (peer1->sort == BGP_PEER_IBGP)
4430 continue;
4431
4432 if (peer1->gtsm_hops != BGP_GTSM_HOPS_DISABLED)
4433 return BGP_ERR_NO_EBGP_MULTIHOP_WITH_TTLHACK;
4434 }
4435 } else {
4436 if (peer->gtsm_hops != BGP_GTSM_HOPS_DISABLED)
4437 return BGP_ERR_NO_EBGP_MULTIHOP_WITH_TTLHACK;
4438 }
4439 }
4440
4441 peer->ttl = ttl;
4442
4443 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4444 if (peer->sort != BGP_PEER_IBGP) {
4445 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status))
4446 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
4447 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4448 else
4449 bgp_session_reset(peer);
4450 }
4451 } else {
4452 group = peer->group;
4453 for (ALL_LIST_ELEMENTS(group->peer, node, nnode, peer)) {
4454 if (peer->sort == BGP_PEER_IBGP)
4455 continue;
4456
4457 peer->ttl = group->conf->ttl;
4458
4459 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status))
4460 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
4461 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4462 else
4463 bgp_session_reset(peer);
4464 }
4465 }
4466 return 0;
4467 }
4468
4469 int peer_ebgp_multihop_unset(struct peer *peer)
4470 {
4471 struct peer_group *group;
4472 struct listnode *node, *nnode;
4473
4474 if (peer->sort == BGP_PEER_IBGP)
4475 return 0;
4476
4477 if (peer->gtsm_hops != BGP_GTSM_HOPS_DISABLED && peer->ttl != MAXTTL)
4478 return BGP_ERR_NO_EBGP_MULTIHOP_WITH_TTLHACK;
4479
4480 if (peer_group_active(peer))
4481 peer->ttl = peer->group->conf->ttl;
4482 else
4483 peer->ttl = BGP_DEFAULT_TTL;
4484
4485 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4486 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status))
4487 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
4488 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4489 else
4490 bgp_session_reset(peer);
4491 } else {
4492 group = peer->group;
4493 for (ALL_LIST_ELEMENTS(group->peer, node, nnode, peer)) {
4494 if (peer->sort == BGP_PEER_IBGP)
4495 continue;
4496
4497 peer->ttl = BGP_DEFAULT_TTL;
4498
4499 if (peer->fd >= 0) {
4500 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status))
4501 bgp_notify_send(
4502 peer, BGP_NOTIFY_CEASE,
4503 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4504 else
4505 bgp_session_reset(peer);
4506 }
4507 }
4508 }
4509 return 0;
4510 }
4511
4512 /* Neighbor description. */
4513 void peer_description_set(struct peer *peer, const char *desc)
4514 {
4515 XFREE(MTYPE_PEER_DESC, peer->desc);
4516
4517 peer->desc = XSTRDUP(MTYPE_PEER_DESC, desc);
4518 }
4519
4520 void peer_description_unset(struct peer *peer)
4521 {
4522 XFREE(MTYPE_PEER_DESC, peer->desc);
4523 }
4524
4525 /* Neighbor update-source. */
4526 int peer_update_source_if_set(struct peer *peer, const char *ifname)
4527 {
4528 struct peer *member;
4529 struct listnode *node, *nnode;
4530
4531 /* Set flag and configuration on peer. */
4532 peer_flag_set(peer, PEER_FLAG_UPDATE_SOURCE);
4533 if (peer->update_if) {
4534 if (strcmp(peer->update_if, ifname) == 0)
4535 return 0;
4536 XFREE(MTYPE_PEER_UPDATE_SOURCE, peer->update_if);
4537 }
4538 peer->update_if = XSTRDUP(MTYPE_PEER_UPDATE_SOURCE, ifname);
4539 sockunion_free(peer->update_source);
4540 peer->update_source = NULL;
4541
4542 /* Check if handling a regular peer. */
4543 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4544 /* Send notification or reset peer depending on state. */
4545 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status)) {
4546 peer->last_reset = PEER_DOWN_UPDATE_SOURCE_CHANGE;
4547 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
4548 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4549 } else
4550 bgp_session_reset(peer);
4551
4552 /* Skip peer-group mechanics for regular peers. */
4553 return 0;
4554 }
4555
4556 /*
4557 * Set flag and configuration on all peer-group members, unless they are
4558 * explicitely overriding peer-group configuration.
4559 */
4560 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
4561 /* Skip peers with overridden configuration. */
4562 if (CHECK_FLAG(member->flags_override, PEER_FLAG_UPDATE_SOURCE))
4563 continue;
4564
4565 /* Skip peers with the same configuration. */
4566 if (member->update_if) {
4567 if (strcmp(member->update_if, ifname) == 0)
4568 continue;
4569 XFREE(MTYPE_PEER_UPDATE_SOURCE, member->update_if);
4570 }
4571
4572 /* Set flag and configuration on peer-group member. */
4573 SET_FLAG(member->flags, PEER_FLAG_UPDATE_SOURCE);
4574 member->update_if = XSTRDUP(MTYPE_PEER_UPDATE_SOURCE, ifname);
4575 sockunion_free(member->update_source);
4576 member->update_source = NULL;
4577
4578 /* Send notification or reset peer depending on state. */
4579 if (BGP_IS_VALID_STATE_FOR_NOTIF(member->status)) {
4580 member->last_reset = PEER_DOWN_UPDATE_SOURCE_CHANGE;
4581 bgp_notify_send(member, BGP_NOTIFY_CEASE,
4582 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4583 } else
4584 bgp_session_reset(member);
4585 }
4586
4587 return 0;
4588 }
4589
4590 int peer_update_source_addr_set(struct peer *peer, const union sockunion *su)
4591 {
4592 struct peer *member;
4593 struct listnode *node, *nnode;
4594
4595 /* Set flag and configuration on peer. */
4596 peer_flag_set(peer, PEER_FLAG_UPDATE_SOURCE);
4597 if (peer->update_source) {
4598 if (sockunion_cmp(peer->update_source, su) == 0)
4599 return 0;
4600 sockunion_free(peer->update_source);
4601 }
4602 peer->update_source = sockunion_dup(su);
4603 XFREE(MTYPE_PEER_UPDATE_SOURCE, peer->update_if);
4604
4605 /* Check if handling a regular peer. */
4606 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4607 /* Send notification or reset peer depending on state. */
4608 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status)) {
4609 peer->last_reset = PEER_DOWN_UPDATE_SOURCE_CHANGE;
4610 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
4611 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4612 } else
4613 bgp_session_reset(peer);
4614
4615 /* Skip peer-group mechanics for regular peers. */
4616 return 0;
4617 }
4618
4619 /*
4620 * Set flag and configuration on all peer-group members, unless they are
4621 * explicitely overriding peer-group configuration.
4622 */
4623 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
4624 /* Skip peers with overridden configuration. */
4625 if (CHECK_FLAG(member->flags_override, PEER_FLAG_UPDATE_SOURCE))
4626 continue;
4627
4628 /* Skip peers with the same configuration. */
4629 if (member->update_source) {
4630 if (sockunion_cmp(member->update_source, su) == 0)
4631 continue;
4632 sockunion_free(member->update_source);
4633 }
4634
4635 /* Set flag and configuration on peer-group member. */
4636 SET_FLAG(member->flags, PEER_FLAG_UPDATE_SOURCE);
4637 member->update_source = sockunion_dup(su);
4638 XFREE(MTYPE_PEER_UPDATE_SOURCE, member->update_if);
4639
4640 /* Send notification or reset peer depending on state. */
4641 if (BGP_IS_VALID_STATE_FOR_NOTIF(member->status)) {
4642 member->last_reset = PEER_DOWN_UPDATE_SOURCE_CHANGE;
4643 bgp_notify_send(member, BGP_NOTIFY_CEASE,
4644 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4645 } else
4646 bgp_session_reset(member);
4647 }
4648
4649 return 0;
4650 }
4651
4652 int peer_update_source_unset(struct peer *peer)
4653 {
4654 struct peer *member;
4655 struct listnode *node, *nnode;
4656
4657 if (!CHECK_FLAG(peer->flags, PEER_FLAG_UPDATE_SOURCE))
4658 return 0;
4659
4660 /* Inherit configuration from peer-group if peer is member. */
4661 if (peer_group_active(peer)) {
4662 peer_flag_inherit(peer, PEER_FLAG_UPDATE_SOURCE);
4663 PEER_SU_ATTR_INHERIT(peer, peer->group, update_source);
4664 PEER_STR_ATTR_INHERIT(peer, peer->group, update_if,
4665 MTYPE_PEER_UPDATE_SOURCE);
4666 } else {
4667 /* Otherwise remove flag and configuration from peer. */
4668 peer_flag_unset(peer, PEER_FLAG_UPDATE_SOURCE);
4669 sockunion_free(peer->update_source);
4670 peer->update_source = NULL;
4671 XFREE(MTYPE_PEER_UPDATE_SOURCE, peer->update_if);
4672 }
4673
4674 /* Check if handling a regular peer. */
4675 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4676 /* Send notification or reset peer depending on state. */
4677 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status)) {
4678 peer->last_reset = PEER_DOWN_UPDATE_SOURCE_CHANGE;
4679 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
4680 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4681 } else
4682 bgp_session_reset(peer);
4683
4684 /* Skip peer-group mechanics for regular peers. */
4685 return 0;
4686 }
4687
4688 /*
4689 * Set flag and configuration on all peer-group members, unless they are
4690 * explicitely overriding peer-group configuration.
4691 */
4692 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
4693 /* Skip peers with overridden configuration. */
4694 if (CHECK_FLAG(member->flags_override, PEER_FLAG_UPDATE_SOURCE))
4695 continue;
4696
4697 /* Skip peers with the same configuration. */
4698 if (!CHECK_FLAG(member->flags, PEER_FLAG_UPDATE_SOURCE)
4699 && !member->update_source && !member->update_if)
4700 continue;
4701
4702 /* Remove flag and configuration on peer-group member. */
4703 UNSET_FLAG(member->flags, PEER_FLAG_UPDATE_SOURCE);
4704 sockunion_free(member->update_source);
4705 member->update_source = NULL;
4706 XFREE(MTYPE_PEER_UPDATE_SOURCE, member->update_if);
4707
4708 /* Send notification or reset peer depending on state. */
4709 if (BGP_IS_VALID_STATE_FOR_NOTIF(member->status)) {
4710 member->last_reset = PEER_DOWN_UPDATE_SOURCE_CHANGE;
4711 bgp_notify_send(member, BGP_NOTIFY_CEASE,
4712 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4713 } else
4714 bgp_session_reset(member);
4715 }
4716
4717 return 0;
4718 }
4719
4720 int peer_default_originate_set(struct peer *peer, afi_t afi, safi_t safi,
4721 const char *rmap, struct route_map *route_map)
4722 {
4723 struct peer *member;
4724 struct listnode *node, *nnode;
4725
4726 /* Set flag and configuration on peer. */
4727 peer_af_flag_set(peer, afi, safi, PEER_FLAG_DEFAULT_ORIGINATE);
4728 if (rmap) {
4729 if (!peer->default_rmap[afi][safi].name
4730 || strcmp(rmap, peer->default_rmap[afi][safi].name) != 0) {
4731 if (peer->default_rmap[afi][safi].name)
4732 XFREE(MTYPE_ROUTE_MAP_NAME,
4733 peer->default_rmap[afi][safi].name);
4734
4735 route_map_counter_decrement(peer->default_rmap[afi][safi].map);
4736 peer->default_rmap[afi][safi].name =
4737 XSTRDUP(MTYPE_ROUTE_MAP_NAME, rmap);
4738 peer->default_rmap[afi][safi].map = route_map;
4739 route_map_counter_increment(route_map);
4740 }
4741 } else if (!rmap) {
4742 if (peer->default_rmap[afi][safi].name)
4743 XFREE(MTYPE_ROUTE_MAP_NAME,
4744 peer->default_rmap[afi][safi].name);
4745
4746 route_map_counter_decrement(peer->default_rmap[afi][safi].map);
4747 peer->default_rmap[afi][safi].name = NULL;
4748 peer->default_rmap[afi][safi].map = NULL;
4749 }
4750
4751 /* Check if handling a regular peer. */
4752 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4753 /* Update peer route announcements. */
4754 if (peer->status == Established && peer->afc_nego[afi][safi]) {
4755 update_group_adjust_peer(peer_af_find(peer, afi, safi));
4756 bgp_default_originate(peer, afi, safi, 0);
4757 bgp_announce_route(peer, afi, safi);
4758 }
4759
4760 /* Skip peer-group mechanics for regular peers. */
4761 return 0;
4762 }
4763
4764 /*
4765 * Set flag and configuration on all peer-group members, unless they are
4766 * explicitely overriding peer-group configuration.
4767 */
4768 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
4769 /* Skip peers with overridden configuration. */
4770 if (CHECK_FLAG(member->af_flags_override[afi][safi],
4771 PEER_FLAG_DEFAULT_ORIGINATE))
4772 continue;
4773
4774 /* Set flag and configuration on peer-group member. */
4775 SET_FLAG(member->af_flags[afi][safi],
4776 PEER_FLAG_DEFAULT_ORIGINATE);
4777 if (rmap) {
4778 if (member->default_rmap[afi][safi].name)
4779 XFREE(MTYPE_ROUTE_MAP_NAME,
4780 member->default_rmap[afi][safi].name);
4781 route_map_counter_decrement(
4782 member->default_rmap[afi][safi].map);
4783 member->default_rmap[afi][safi].name =
4784 XSTRDUP(MTYPE_ROUTE_MAP_NAME, rmap);
4785 member->default_rmap[afi][safi].map = route_map;
4786 route_map_counter_increment(route_map);
4787 }
4788
4789 /* Update peer route announcements. */
4790 if (member->status == Established
4791 && member->afc_nego[afi][safi]) {
4792 update_group_adjust_peer(
4793 peer_af_find(member, afi, safi));
4794 bgp_default_originate(member, afi, safi, 0);
4795 bgp_announce_route(member, afi, safi);
4796 }
4797 }
4798
4799 return 0;
4800 }
4801
4802 int peer_default_originate_unset(struct peer *peer, afi_t afi, safi_t safi)
4803 {
4804 struct peer *member;
4805 struct listnode *node, *nnode;
4806
4807 /* Inherit configuration from peer-group if peer is member. */
4808 if (peer_group_active(peer)) {
4809 peer_af_flag_inherit(peer, afi, safi,
4810 PEER_FLAG_DEFAULT_ORIGINATE);
4811 PEER_STR_ATTR_INHERIT(peer, peer->group,
4812 default_rmap[afi][safi].name,
4813 MTYPE_ROUTE_MAP_NAME);
4814 PEER_ATTR_INHERIT(peer, peer->group,
4815 default_rmap[afi][safi].map);
4816 } else {
4817 /* Otherwise remove flag and configuration from peer. */
4818 peer_af_flag_unset(peer, afi, safi,
4819 PEER_FLAG_DEFAULT_ORIGINATE);
4820 if (peer->default_rmap[afi][safi].name)
4821 XFREE(MTYPE_ROUTE_MAP_NAME,
4822 peer->default_rmap[afi][safi].name);
4823 route_map_counter_decrement(peer->default_rmap[afi][safi].map);
4824 peer->default_rmap[afi][safi].name = NULL;
4825 peer->default_rmap[afi][safi].map = NULL;
4826 }
4827
4828 /* Check if handling a regular peer. */
4829 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4830 /* Update peer route announcements. */
4831 if (peer->status == Established && peer->afc_nego[afi][safi]) {
4832 update_group_adjust_peer(peer_af_find(peer, afi, safi));
4833 bgp_default_originate(peer, afi, safi, 1);
4834 bgp_announce_route(peer, afi, safi);
4835 }
4836
4837 /* Skip peer-group mechanics for regular peers. */
4838 return 0;
4839 }
4840
4841 /*
4842 * Remove flag and configuration from all peer-group members, unless
4843 * they are explicitely overriding peer-group configuration.
4844 */
4845 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
4846 /* Skip peers with overridden configuration. */
4847 if (CHECK_FLAG(member->af_flags_override[afi][safi],
4848 PEER_FLAG_DEFAULT_ORIGINATE))
4849 continue;
4850
4851 /* Remove flag and configuration on peer-group member. */
4852 UNSET_FLAG(peer->af_flags[afi][safi],
4853 PEER_FLAG_DEFAULT_ORIGINATE);
4854 if (peer->default_rmap[afi][safi].name)
4855 XFREE(MTYPE_ROUTE_MAP_NAME,
4856 peer->default_rmap[afi][safi].name);
4857 route_map_counter_decrement(peer->default_rmap[afi][safi].map);
4858 peer->default_rmap[afi][safi].name = NULL;
4859 peer->default_rmap[afi][safi].map = NULL;
4860
4861 /* Update peer route announcements. */
4862 if (peer->status == Established && peer->afc_nego[afi][safi]) {
4863 update_group_adjust_peer(peer_af_find(peer, afi, safi));
4864 bgp_default_originate(peer, afi, safi, 1);
4865 bgp_announce_route(peer, afi, safi);
4866 }
4867 }
4868
4869 return 0;
4870 }
4871
4872 void peer_port_set(struct peer *peer, uint16_t port)
4873 {
4874 peer->port = port;
4875 }
4876
4877 void peer_port_unset(struct peer *peer)
4878 {
4879 peer->port = BGP_PORT_DEFAULT;
4880 }
4881
4882 /*
4883 * Helper function that is called after the name of the policy
4884 * being used by a peer has changed (AF specific). Automatically
4885 * initiates inbound or outbound processing as needed.
4886 */
4887 static void peer_on_policy_change(struct peer *peer, afi_t afi, safi_t safi,
4888 int outbound)
4889 {
4890 if (outbound) {
4891 update_group_adjust_peer(peer_af_find(peer, afi, safi));
4892 if (peer->status == Established)
4893 bgp_announce_route(peer, afi, safi);
4894 } else {
4895 if (peer->status != Established)
4896 return;
4897
4898 if (CHECK_FLAG(peer->af_flags[afi][safi],
4899 PEER_FLAG_SOFT_RECONFIG))
4900 bgp_soft_reconfig_in(peer, afi, safi);
4901 else if (CHECK_FLAG(peer->cap, PEER_CAP_REFRESH_OLD_RCV)
4902 || CHECK_FLAG(peer->cap, PEER_CAP_REFRESH_NEW_RCV))
4903 bgp_route_refresh_send(peer, afi, safi, 0, 0, 0);
4904 }
4905 }
4906
4907
4908 /* neighbor weight. */
4909 int peer_weight_set(struct peer *peer, afi_t afi, safi_t safi, uint16_t weight)
4910 {
4911 struct peer *member;
4912 struct listnode *node, *nnode;
4913
4914 /* Set flag and configuration on peer. */
4915 peer_af_flag_set(peer, afi, safi, PEER_FLAG_WEIGHT);
4916 if (peer->weight[afi][safi] != weight) {
4917 peer->weight[afi][safi] = weight;
4918 peer_on_policy_change(peer, afi, safi, 0);
4919 }
4920
4921 /* Skip peer-group mechanics for regular peers. */
4922 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP))
4923 return 0;
4924
4925 /*
4926 * Set flag and configuration on all peer-group members, unless they are
4927 * explicitely overriding peer-group configuration.
4928 */
4929 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
4930 /* Skip peers with overridden configuration. */
4931 if (CHECK_FLAG(member->af_flags_override[afi][safi],
4932 PEER_FLAG_WEIGHT))
4933 continue;
4934
4935 /* Set flag and configuration on peer-group member. */
4936 SET_FLAG(member->af_flags[afi][safi], PEER_FLAG_WEIGHT);
4937 if (member->weight[afi][safi] != weight) {
4938 member->weight[afi][safi] = weight;
4939 peer_on_policy_change(member, afi, safi, 0);
4940 }
4941 }
4942
4943 return 0;
4944 }
4945
4946 int peer_weight_unset(struct peer *peer, afi_t afi, safi_t safi)
4947 {
4948 struct peer *member;
4949 struct listnode *node, *nnode;
4950
4951 if (!CHECK_FLAG(peer->af_flags[afi][safi], PEER_FLAG_WEIGHT))
4952 return 0;
4953
4954 /* Inherit configuration from peer-group if peer is member. */
4955 if (peer_group_active(peer)) {
4956 peer_af_flag_inherit(peer, afi, safi, PEER_FLAG_WEIGHT);
4957 PEER_ATTR_INHERIT(peer, peer->group, weight[afi][safi]);
4958
4959 peer_on_policy_change(peer, afi, safi, 0);
4960 return 0;
4961 }
4962
4963 /* Remove flag and configuration from peer. */
4964 peer_af_flag_unset(peer, afi, safi, PEER_FLAG_WEIGHT);
4965 peer->weight[afi][safi] = 0;
4966 peer_on_policy_change(peer, afi, safi, 0);
4967
4968 /* Skip peer-group mechanics for regular peers. */
4969 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP))
4970 return 0;
4971
4972 /*
4973 * Remove flag and configuration from all peer-group members, unless
4974 * they are explicitely overriding peer-group configuration.
4975 */
4976 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
4977 /* Skip peers with overridden configuration. */
4978 if (CHECK_FLAG(member->af_flags_override[afi][safi],
4979 PEER_FLAG_WEIGHT))
4980 continue;
4981
4982 /* Skip peers where flag is already disabled. */
4983 if (!CHECK_FLAG(member->af_flags[afi][safi], PEER_FLAG_WEIGHT))
4984 continue;
4985
4986 /* Remove flag and configuration on peer-group member. */
4987 UNSET_FLAG(member->af_flags[afi][safi], PEER_FLAG_WEIGHT);
4988 member->weight[afi][safi] = 0;
4989 peer_on_policy_change(member, afi, safi, 0);
4990 }
4991
4992 return 0;
4993 }
4994
4995 int peer_timers_set(struct peer *peer, uint32_t keepalive, uint32_t holdtime)
4996 {
4997 struct peer *member;
4998 struct listnode *node, *nnode;
4999
5000 if (keepalive > 65535)
5001 return BGP_ERR_INVALID_VALUE;
5002
5003 if (holdtime > 65535)
5004 return BGP_ERR_INVALID_VALUE;
5005
5006 if (holdtime < 3 && holdtime != 0)
5007 return BGP_ERR_INVALID_VALUE;
5008
5009 /* Set flag and configuration on peer. */
5010 peer_flag_set(peer, PEER_FLAG_TIMER);
5011 peer->holdtime = holdtime;
5012 peer->keepalive = (keepalive < holdtime / 3 ? keepalive : holdtime / 3);
5013
5014 /* Skip peer-group mechanics for regular peers. */
5015 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP))
5016 return 0;
5017
5018 /*
5019 * Set flag and configuration on all peer-group members, unless they are
5020 * explicitely overriding peer-group configuration.
5021 */
5022 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5023 /* Skip peers with overridden configuration. */
5024 if (CHECK_FLAG(member->flags_override, PEER_FLAG_TIMER))
5025 continue;
5026
5027 /* Set flag and configuration on peer-group member. */
5028 SET_FLAG(member->flags, PEER_FLAG_TIMER);
5029 PEER_ATTR_INHERIT(peer, peer->group, holdtime);
5030 PEER_ATTR_INHERIT(peer, peer->group, keepalive);
5031 }
5032
5033 return 0;
5034 }
5035
5036 int peer_timers_unset(struct peer *peer)
5037 {
5038 struct peer *member;
5039 struct listnode *node, *nnode;
5040
5041 /* Inherit configuration from peer-group if peer is member. */
5042 if (peer_group_active(peer)) {
5043 peer_flag_inherit(peer, PEER_FLAG_TIMER);
5044 PEER_ATTR_INHERIT(peer, peer->group, holdtime);
5045 PEER_ATTR_INHERIT(peer, peer->group, keepalive);
5046 } else {
5047 /* Otherwise remove flag and configuration from peer. */
5048 peer_flag_unset(peer, PEER_FLAG_TIMER);
5049 peer->holdtime = 0;
5050 peer->keepalive = 0;
5051 }
5052
5053 /* Skip peer-group mechanics for regular peers. */
5054 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP))
5055 return 0;
5056
5057 /*
5058 * Remove flag and configuration from all peer-group members, unless
5059 * they are explicitely overriding peer-group configuration.
5060 */
5061 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5062 /* Skip peers with overridden configuration. */
5063 if (CHECK_FLAG(member->flags_override, PEER_FLAG_TIMER))
5064 continue;
5065
5066 /* Remove flag and configuration on peer-group member. */
5067 UNSET_FLAG(member->flags, PEER_FLAG_TIMER);
5068 member->holdtime = 0;
5069 member->keepalive = 0;
5070 }
5071
5072 return 0;
5073 }
5074
5075 int peer_timers_connect_set(struct peer *peer, uint32_t connect)
5076 {
5077 struct peer *member;
5078 struct listnode *node, *nnode;
5079
5080 if (connect > 65535)
5081 return BGP_ERR_INVALID_VALUE;
5082
5083 /* Set flag and configuration on peer. */
5084 peer_flag_set(peer, PEER_FLAG_TIMER_CONNECT);
5085 peer->connect = connect;
5086 peer->v_connect = connect;
5087
5088 /* Skip peer-group mechanics for regular peers. */
5089 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP))
5090 return 0;
5091
5092 /*
5093 * Set flag and configuration on all peer-group members, unless they are
5094 * explicitely overriding peer-group configuration.
5095 */
5096 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5097 /* Skip peers with overridden configuration. */
5098 if (CHECK_FLAG(member->flags_override, PEER_FLAG_TIMER_CONNECT))
5099 continue;
5100
5101 /* Set flag and configuration on peer-group member. */
5102 SET_FLAG(member->flags, PEER_FLAG_TIMER_CONNECT);
5103 member->connect = connect;
5104 member->v_connect = connect;
5105 }
5106
5107 return 0;
5108 }
5109
5110 int peer_timers_connect_unset(struct peer *peer)
5111 {
5112 struct peer *member;
5113 struct listnode *node, *nnode;
5114
5115 /* Inherit configuration from peer-group if peer is member. */
5116 if (peer_group_active(peer)) {
5117 peer_flag_inherit(peer, PEER_FLAG_TIMER_CONNECT);
5118 PEER_ATTR_INHERIT(peer, peer->group, connect);
5119 } else {
5120 /* Otherwise remove flag and configuration from peer. */
5121 peer_flag_unset(peer, PEER_FLAG_TIMER_CONNECT);
5122 peer->connect = 0;
5123 }
5124
5125 /* Set timer with fallback to default value. */
5126 if (peer->connect)
5127 peer->v_connect = peer->connect;
5128 else
5129 peer->v_connect = peer->bgp->default_connect_retry;
5130
5131 /* Skip peer-group mechanics for regular peers. */
5132 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP))
5133 return 0;
5134
5135 /*
5136 * Remove flag and configuration from all peer-group members, unless
5137 * they are explicitely overriding peer-group configuration.
5138 */
5139 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5140 /* Skip peers with overridden configuration. */
5141 if (CHECK_FLAG(member->flags_override, PEER_FLAG_TIMER_CONNECT))
5142 continue;
5143
5144 /* Remove flag and configuration on peer-group member. */
5145 UNSET_FLAG(member->flags, PEER_FLAG_TIMER_CONNECT);
5146 member->connect = 0;
5147 member->v_connect = peer->bgp->default_connect_retry;
5148 }
5149
5150 return 0;
5151 }
5152
5153 int peer_advertise_interval_set(struct peer *peer, uint32_t routeadv)
5154 {
5155 struct peer *member;
5156 struct listnode *node, *nnode;
5157
5158 if (routeadv > 600)
5159 return BGP_ERR_INVALID_VALUE;
5160
5161 /* Set flag and configuration on peer. */
5162 peer_flag_set(peer, PEER_FLAG_ROUTEADV);
5163 peer->routeadv = routeadv;
5164 peer->v_routeadv = routeadv;
5165
5166 /* Check if handling a regular peer. */
5167 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
5168 /* Update peer route announcements. */
5169 update_group_adjust_peer_afs(peer);
5170 if (peer->status == Established)
5171 bgp_announce_route_all(peer);
5172
5173 /* Skip peer-group mechanics for regular peers. */
5174 return 0;
5175 }
5176
5177 /*
5178 * Set flag and configuration on all peer-group members, unless they are
5179 * explicitely overriding peer-group configuration.
5180 */
5181 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5182 /* Skip peers with overridden configuration. */
5183 if (CHECK_FLAG(member->flags_override, PEER_FLAG_ROUTEADV))
5184 continue;
5185
5186 /* Set flag and configuration on peer-group member. */
5187 SET_FLAG(member->flags, PEER_FLAG_ROUTEADV);
5188 member->routeadv = routeadv;
5189 member->v_routeadv = 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 int peer_advertise_interval_unset(struct peer *peer)
5201 {
5202 struct peer *member;
5203 struct listnode *node, *nnode;
5204
5205 /* Inherit configuration from peer-group if peer is member. */
5206 if (peer_group_active(peer)) {
5207 peer_flag_inherit(peer, PEER_FLAG_ROUTEADV);
5208 PEER_ATTR_INHERIT(peer, peer->group, routeadv);
5209 } else {
5210 /* Otherwise remove flag and configuration from peer. */
5211 peer_flag_unset(peer, PEER_FLAG_ROUTEADV);
5212 peer->routeadv = 0;
5213 }
5214
5215 /* Set timer with fallback to default value. */
5216 if (peer->routeadv)
5217 peer->v_routeadv = peer->routeadv;
5218 else
5219 peer->v_routeadv = (peer->sort == BGP_PEER_IBGP)
5220 ? BGP_DEFAULT_IBGP_ROUTEADV
5221 : BGP_DEFAULT_EBGP_ROUTEADV;
5222
5223 /* Check if handling a regular peer. */
5224 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
5225 /* Update peer route announcements. */
5226 update_group_adjust_peer_afs(peer);
5227 if (peer->status == Established)
5228 bgp_announce_route_all(peer);
5229
5230 /* Skip peer-group mechanics for regular peers. */
5231 return 0;
5232 }
5233
5234 /*
5235 * Remove flag and configuration from all peer-group members, unless
5236 * they are explicitely overriding peer-group configuration.
5237 */
5238 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5239 /* Skip peers with overridden configuration. */
5240 if (CHECK_FLAG(member->flags_override, PEER_FLAG_ROUTEADV))
5241 continue;
5242
5243 /* Remove flag and configuration on peer-group member. */
5244 UNSET_FLAG(member->flags, PEER_FLAG_ROUTEADV);
5245 member->routeadv = 0;
5246 member->v_routeadv = (member->sort == BGP_PEER_IBGP)
5247 ? BGP_DEFAULT_IBGP_ROUTEADV
5248 : BGP_DEFAULT_EBGP_ROUTEADV;
5249
5250 /* Update peer route announcements. */
5251 update_group_adjust_peer_afs(member);
5252 if (member->status == Established)
5253 bgp_announce_route_all(member);
5254 }
5255
5256 return 0;
5257 }
5258
5259 /* neighbor interface */
5260 void peer_interface_set(struct peer *peer, const char *str)
5261 {
5262 XFREE(MTYPE_BGP_PEER_IFNAME, peer->ifname);
5263 peer->ifname = XSTRDUP(MTYPE_BGP_PEER_IFNAME, str);
5264 }
5265
5266 void peer_interface_unset(struct peer *peer)
5267 {
5268 XFREE(MTYPE_BGP_PEER_IFNAME, peer->ifname);
5269 }
5270
5271 /* Allow-as in. */
5272 int peer_allowas_in_set(struct peer *peer, afi_t afi, safi_t safi,
5273 int allow_num, int origin)
5274 {
5275 struct peer *member;
5276 struct listnode *node, *nnode;
5277
5278 if (!origin && (allow_num < 1 || allow_num > 10))
5279 return BGP_ERR_INVALID_VALUE;
5280
5281 /* Set flag and configuration on peer. */
5282 peer_af_flag_set(peer, afi, safi, PEER_FLAG_ALLOWAS_IN);
5283 if (origin) {
5284 if (peer->allowas_in[afi][safi] != 0
5285 || !CHECK_FLAG(peer->af_flags[afi][safi],
5286 PEER_FLAG_ALLOWAS_IN_ORIGIN)) {
5287 peer_af_flag_set(peer, afi, safi,
5288 PEER_FLAG_ALLOWAS_IN_ORIGIN);
5289 peer->allowas_in[afi][safi] = 0;
5290 peer_on_policy_change(peer, afi, safi, 0);
5291 }
5292 } else {
5293 if (peer->allowas_in[afi][safi] != allow_num
5294 || CHECK_FLAG(peer->af_flags[afi][safi],
5295 PEER_FLAG_ALLOWAS_IN_ORIGIN)) {
5296
5297 peer_af_flag_unset(peer, afi, safi,
5298 PEER_FLAG_ALLOWAS_IN_ORIGIN);
5299 peer->allowas_in[afi][safi] = allow_num;
5300 peer_on_policy_change(peer, afi, safi, 0);
5301 }
5302 }
5303
5304 /* Skip peer-group mechanics for regular peers. */
5305 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP))
5306 return 0;
5307
5308 /*
5309 * Set flag and configuration on all peer-group members, unless
5310 * they are explicitely overriding peer-group configuration.
5311 */
5312 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5313 /* Skip peers with overridden configuration. */
5314 if (CHECK_FLAG(member->af_flags_override[afi][safi],
5315 PEER_FLAG_ALLOWAS_IN))
5316 continue;
5317
5318 /* Set flag and configuration on peer-group member. */
5319 SET_FLAG(member->af_flags[afi][safi], PEER_FLAG_ALLOWAS_IN);
5320 if (origin) {
5321 if (member->allowas_in[afi][safi] != 0
5322 || !CHECK_FLAG(member->af_flags[afi][safi],
5323 PEER_FLAG_ALLOWAS_IN_ORIGIN)) {
5324 SET_FLAG(member->af_flags[afi][safi],
5325 PEER_FLAG_ALLOWAS_IN_ORIGIN);
5326 member->allowas_in[afi][safi] = 0;
5327 peer_on_policy_change(peer, afi, safi, 0);
5328 }
5329 } else {
5330 if (member->allowas_in[afi][safi] != allow_num
5331 || CHECK_FLAG(member->af_flags[afi][safi],
5332 PEER_FLAG_ALLOWAS_IN_ORIGIN)) {
5333 UNSET_FLAG(member->af_flags[afi][safi],
5334 PEER_FLAG_ALLOWAS_IN_ORIGIN);
5335 member->allowas_in[afi][safi] = allow_num;
5336 peer_on_policy_change(peer, afi, safi, 0);
5337 }
5338 }
5339 }
5340
5341 return 0;
5342 }
5343
5344 int peer_allowas_in_unset(struct peer *peer, afi_t afi, safi_t safi)
5345 {
5346 struct peer *member;
5347 struct listnode *node, *nnode;
5348
5349 /* Skip peer if flag is already disabled. */
5350 if (!CHECK_FLAG(peer->af_flags[afi][safi], PEER_FLAG_ALLOWAS_IN))
5351 return 0;
5352
5353 /* Inherit configuration from peer-group if peer is member. */
5354 if (peer_group_active(peer)) {
5355 peer_af_flag_inherit(peer, afi, safi, PEER_FLAG_ALLOWAS_IN);
5356 peer_af_flag_inherit(peer, afi, safi,
5357 PEER_FLAG_ALLOWAS_IN_ORIGIN);
5358 PEER_ATTR_INHERIT(peer, peer->group, allowas_in[afi][safi]);
5359 peer_on_policy_change(peer, afi, safi, 0);
5360
5361 return 0;
5362 }
5363
5364 /* Remove flag and configuration from peer. */
5365 peer_af_flag_unset(peer, afi, safi, PEER_FLAG_ALLOWAS_IN);
5366 peer_af_flag_unset(peer, afi, safi, PEER_FLAG_ALLOWAS_IN_ORIGIN);
5367 peer->allowas_in[afi][safi] = 0;
5368 peer_on_policy_change(peer, afi, safi, 0);
5369
5370 /* Skip peer-group mechanics if handling a regular peer. */
5371 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP))
5372 return 0;
5373
5374 /*
5375 * Remove flags and configuration from all peer-group members, unless
5376 * they are explicitely overriding peer-group configuration.
5377 */
5378 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5379 /* Skip peers with overridden configuration. */
5380 if (CHECK_FLAG(member->af_flags_override[afi][safi],
5381 PEER_FLAG_ALLOWAS_IN))
5382 continue;
5383
5384 /* Skip peers where flag is already disabled. */
5385 if (!CHECK_FLAG(member->af_flags[afi][safi],
5386 PEER_FLAG_ALLOWAS_IN))
5387 continue;
5388
5389 /* Remove flags and configuration on peer-group member. */
5390 UNSET_FLAG(member->af_flags[afi][safi], PEER_FLAG_ALLOWAS_IN);
5391 UNSET_FLAG(member->af_flags[afi][safi],
5392 PEER_FLAG_ALLOWAS_IN_ORIGIN);
5393 member->allowas_in[afi][safi] = 0;
5394 peer_on_policy_change(member, afi, safi, 0);
5395 }
5396
5397 return 0;
5398 }
5399
5400 int peer_local_as_set(struct peer *peer, as_t as, int no_prepend,
5401 int replace_as)
5402 {
5403 bool old_no_prepend, old_replace_as;
5404 struct bgp *bgp = peer->bgp;
5405 struct peer *member;
5406 struct listnode *node, *nnode;
5407 bgp_peer_sort_t ptype = peer_sort(peer);
5408
5409 if (ptype != BGP_PEER_EBGP && ptype != BGP_PEER_INTERNAL)
5410 return BGP_ERR_LOCAL_AS_ALLOWED_ONLY_FOR_EBGP;
5411
5412 if (bgp->as == as)
5413 return BGP_ERR_CANNOT_HAVE_LOCAL_AS_SAME_AS;
5414
5415 if (peer->as == as)
5416 return BGP_ERR_CANNOT_HAVE_LOCAL_AS_SAME_AS_REMOTE_AS;
5417
5418 /* Save previous flag states. */
5419 old_no_prepend =
5420 !!CHECK_FLAG(peer->flags, PEER_FLAG_LOCAL_AS_NO_PREPEND);
5421 old_replace_as =
5422 !!CHECK_FLAG(peer->flags, PEER_FLAG_LOCAL_AS_REPLACE_AS);
5423
5424 /* Set flag and configuration on peer. */
5425 peer_flag_set(peer, PEER_FLAG_LOCAL_AS);
5426 peer_flag_modify(peer, PEER_FLAG_LOCAL_AS_NO_PREPEND, no_prepend);
5427 peer_flag_modify(peer, PEER_FLAG_LOCAL_AS_REPLACE_AS, replace_as);
5428
5429 if (peer->change_local_as == as && old_no_prepend == no_prepend
5430 && old_replace_as == replace_as)
5431 return 0;
5432 peer->change_local_as = as;
5433
5434 /* Check if handling a regular peer. */
5435 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
5436 /* Send notification or reset peer depending on state. */
5437 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status)) {
5438 peer->last_reset = PEER_DOWN_LOCAL_AS_CHANGE;
5439 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
5440 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
5441 } else
5442 bgp_session_reset(peer);
5443
5444 /* Skip peer-group mechanics for regular peers. */
5445 return 0;
5446 }
5447
5448 /*
5449 * Set flag and configuration on all peer-group members, unless they are
5450 * explicitely overriding peer-group configuration.
5451 */
5452 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5453 /* Skip peers with overridden configuration. */
5454 if (CHECK_FLAG(member->flags_override, PEER_FLAG_LOCAL_AS))
5455 continue;
5456
5457 /* Skip peers with the same configuration. */
5458 old_no_prepend = CHECK_FLAG(member->flags,
5459 PEER_FLAG_LOCAL_AS_NO_PREPEND);
5460 old_replace_as = CHECK_FLAG(member->flags,
5461 PEER_FLAG_LOCAL_AS_REPLACE_AS);
5462 if (member->change_local_as == as
5463 && CHECK_FLAG(member->flags, PEER_FLAG_LOCAL_AS)
5464 && old_no_prepend == no_prepend
5465 && old_replace_as == replace_as)
5466 continue;
5467
5468 /* Set flag and configuration on peer-group member. */
5469 SET_FLAG(member->flags, PEER_FLAG_LOCAL_AS);
5470 COND_FLAG(member->flags, PEER_FLAG_LOCAL_AS_NO_PREPEND,
5471 no_prepend);
5472 COND_FLAG(member->flags, PEER_FLAG_LOCAL_AS_REPLACE_AS,
5473 replace_as);
5474 member->change_local_as = as;
5475
5476 /* Send notification or stop peer depending on state. */
5477 if (BGP_IS_VALID_STATE_FOR_NOTIF(member->status)) {
5478 member->last_reset = PEER_DOWN_LOCAL_AS_CHANGE;
5479 bgp_notify_send(member, BGP_NOTIFY_CEASE,
5480 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
5481 } else
5482 BGP_EVENT_ADD(member, BGP_Stop);
5483 }
5484
5485 return 0;
5486 }
5487
5488 int peer_local_as_unset(struct peer *peer)
5489 {
5490 struct peer *member;
5491 struct listnode *node, *nnode;
5492
5493 if (!CHECK_FLAG(peer->flags, PEER_FLAG_LOCAL_AS))
5494 return 0;
5495
5496 /* Inherit configuration from peer-group if peer is member. */
5497 if (peer_group_active(peer)) {
5498 peer_flag_inherit(peer, PEER_FLAG_LOCAL_AS);
5499 peer_flag_inherit(peer, PEER_FLAG_LOCAL_AS_NO_PREPEND);
5500 peer_flag_inherit(peer, PEER_FLAG_LOCAL_AS_REPLACE_AS);
5501 PEER_ATTR_INHERIT(peer, peer->group, change_local_as);
5502 } else {
5503 /* Otherwise remove flag and configuration from peer. */
5504 peer_flag_unset(peer, PEER_FLAG_LOCAL_AS);
5505 peer_flag_unset(peer, PEER_FLAG_LOCAL_AS_NO_PREPEND);
5506 peer_flag_unset(peer, PEER_FLAG_LOCAL_AS_REPLACE_AS);
5507 peer->change_local_as = 0;
5508 }
5509
5510 /* Check if handling a regular peer. */
5511 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
5512 /* Send notification or stop peer depending on state. */
5513 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status)) {
5514 peer->last_reset = PEER_DOWN_LOCAL_AS_CHANGE;
5515 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
5516 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
5517 } else
5518 BGP_EVENT_ADD(peer, BGP_Stop);
5519
5520 /* Skip peer-group mechanics for regular peers. */
5521 return 0;
5522 }
5523
5524 /*
5525 * Remove flag and configuration from all peer-group members, unless
5526 * they are explicitely overriding peer-group configuration.
5527 */
5528 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5529 /* Skip peers with overridden configuration. */
5530 if (CHECK_FLAG(member->flags_override, PEER_FLAG_LOCAL_AS))
5531 continue;
5532
5533 /* Remove flag and configuration on peer-group member. */
5534 UNSET_FLAG(member->flags, PEER_FLAG_LOCAL_AS);
5535 UNSET_FLAG(member->flags, PEER_FLAG_LOCAL_AS_NO_PREPEND);
5536 UNSET_FLAG(member->flags, PEER_FLAG_LOCAL_AS_REPLACE_AS);
5537 member->change_local_as = 0;
5538
5539 /* Send notification or stop peer depending on state. */
5540 if (BGP_IS_VALID_STATE_FOR_NOTIF(member->status)) {
5541 member->last_reset = PEER_DOWN_LOCAL_AS_CHANGE;
5542 bgp_notify_send(member, BGP_NOTIFY_CEASE,
5543 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
5544 } else
5545 bgp_session_reset(member);
5546 }
5547
5548 return 0;
5549 }
5550
5551 /* Set password for authenticating with the peer. */
5552 int peer_password_set(struct peer *peer, const char *password)
5553 {
5554 struct peer *member;
5555 struct listnode *node, *nnode;
5556 int len = password ? strlen(password) : 0;
5557 int ret = BGP_SUCCESS;
5558
5559 if ((len < PEER_PASSWORD_MINLEN) || (len > PEER_PASSWORD_MAXLEN))
5560 return BGP_ERR_INVALID_VALUE;
5561
5562 /* Set flag and configuration on peer. */
5563 peer_flag_set(peer, PEER_FLAG_PASSWORD);
5564 if (peer->password && strcmp(peer->password, password) == 0)
5565 return 0;
5566 XFREE(MTYPE_PEER_PASSWORD, peer->password);
5567 peer->password = XSTRDUP(MTYPE_PEER_PASSWORD, password);
5568
5569 /* Check if handling a regular peer. */
5570 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
5571 /* Send notification or reset peer depending on state. */
5572 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status))
5573 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
5574 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
5575 else
5576 bgp_session_reset(peer);
5577
5578 /*
5579 * Attempt to install password on socket and skip peer-group
5580 * mechanics.
5581 */
5582 if (BGP_PEER_SU_UNSPEC(peer))
5583 return BGP_SUCCESS;
5584 return (bgp_md5_set(peer) >= 0) ? BGP_SUCCESS
5585 : BGP_ERR_TCPSIG_FAILED;
5586 }
5587
5588 /*
5589 * Set flag and configuration on all peer-group members, unless they are
5590 * explicitely overriding peer-group configuration.
5591 */
5592 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5593 /* Skip peers with overridden configuration. */
5594 if (CHECK_FLAG(member->flags_override, PEER_FLAG_PASSWORD))
5595 continue;
5596
5597 /* Skip peers with the same password. */
5598 if (member->password && strcmp(member->password, password) == 0)
5599 continue;
5600
5601 /* Set flag and configuration on peer-group member. */
5602 SET_FLAG(member->flags, PEER_FLAG_PASSWORD);
5603 if (member->password)
5604 XFREE(MTYPE_PEER_PASSWORD, member->password);
5605 member->password = XSTRDUP(MTYPE_PEER_PASSWORD, password);
5606
5607 /* Send notification or reset peer depending on state. */
5608 if (BGP_IS_VALID_STATE_FOR_NOTIF(member->status))
5609 bgp_notify_send(member, BGP_NOTIFY_CEASE,
5610 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
5611 else
5612 bgp_session_reset(member);
5613
5614 /* Attempt to install password on socket. */
5615 if (!BGP_PEER_SU_UNSPEC(member) && bgp_md5_set(member) < 0)
5616 ret = BGP_ERR_TCPSIG_FAILED;
5617 }
5618
5619 /* Set flag and configuration on all peer-group listen ranges */
5620 struct listnode *ln;
5621 struct prefix *lr;
5622
5623 for (ALL_LIST_ELEMENTS_RO(peer->group->listen_range[AFI_IP], ln, lr))
5624 bgp_md5_set_prefix(lr, password);
5625 for (ALL_LIST_ELEMENTS_RO(peer->group->listen_range[AFI_IP6], ln, lr))
5626 bgp_md5_set_prefix(lr, password);
5627
5628 return ret;
5629 }
5630
5631 int peer_password_unset(struct peer *peer)
5632 {
5633 struct peer *member;
5634 struct listnode *node, *nnode;
5635
5636 if (!CHECK_FLAG(peer->flags, PEER_FLAG_PASSWORD))
5637 return 0;
5638
5639 /* Inherit configuration from peer-group if peer is member. */
5640 if (peer_group_active(peer)) {
5641 peer_flag_inherit(peer, PEER_FLAG_PASSWORD);
5642 PEER_STR_ATTR_INHERIT(peer, peer->group, password,
5643 MTYPE_PEER_PASSWORD);
5644 } else {
5645 /* Otherwise remove flag and configuration from peer. */
5646 peer_flag_unset(peer, PEER_FLAG_PASSWORD);
5647 XFREE(MTYPE_PEER_PASSWORD, peer->password);
5648 }
5649
5650 /* Check if handling a regular peer. */
5651 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
5652 /* Send notification or reset peer depending on state. */
5653 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status))
5654 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
5655 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
5656 else
5657 bgp_session_reset(peer);
5658
5659 /* Attempt to uninstall password on socket. */
5660 if (!BGP_PEER_SU_UNSPEC(peer))
5661 bgp_md5_unset(peer);
5662
5663 /* Skip peer-group mechanics for regular peers. */
5664 return 0;
5665 }
5666
5667 /*
5668 * Remove flag and configuration from all peer-group members, unless
5669 * they are explicitely overriding peer-group configuration.
5670 */
5671 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5672 /* Skip peers with overridden configuration. */
5673 if (CHECK_FLAG(member->flags_override, PEER_FLAG_PASSWORD))
5674 continue;
5675
5676 /* Remove flag and configuration on peer-group member. */
5677 UNSET_FLAG(member->flags, PEER_FLAG_PASSWORD);
5678 XFREE(MTYPE_PEER_PASSWORD, member->password);
5679
5680 /* Send notification or reset peer depending on state. */
5681 if (BGP_IS_VALID_STATE_FOR_NOTIF(member->status))
5682 bgp_notify_send(member, BGP_NOTIFY_CEASE,
5683 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
5684 else
5685 bgp_session_reset(member);
5686
5687 /* Attempt to uninstall password on socket. */
5688 if (!BGP_PEER_SU_UNSPEC(member))
5689 bgp_md5_unset(member);
5690 }
5691
5692 /* Set flag and configuration on all peer-group listen ranges */
5693 struct listnode *ln;
5694 struct prefix *lr;
5695
5696 for (ALL_LIST_ELEMENTS_RO(peer->group->listen_range[AFI_IP], ln, lr))
5697 bgp_md5_unset_prefix(lr);
5698 for (ALL_LIST_ELEMENTS_RO(peer->group->listen_range[AFI_IP6], ln, lr))
5699 bgp_md5_unset_prefix(lr);
5700
5701 return 0;
5702 }
5703
5704
5705 /* Set distribute list to the peer. */
5706 int peer_distribute_set(struct peer *peer, afi_t afi, safi_t safi, int direct,
5707 const char *name)
5708 {
5709 struct peer *member;
5710 struct bgp_filter *filter;
5711 struct listnode *node, *nnode;
5712
5713 if (direct != FILTER_IN && direct != FILTER_OUT)
5714 return BGP_ERR_INVALID_VALUE;
5715
5716 /* Set configuration on peer. */
5717 filter = &peer->filter[afi][safi];
5718 if (filter->plist[direct].name)
5719 return BGP_ERR_PEER_FILTER_CONFLICT;
5720 if (filter->dlist[direct].name)
5721 XFREE(MTYPE_BGP_FILTER_NAME, filter->dlist[direct].name);
5722 filter->dlist[direct].name = XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
5723 filter->dlist[direct].alist = access_list_lookup(afi, name);
5724
5725 /* Check if handling a regular peer. */
5726 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
5727 /* Set override-flag and process peer route updates. */
5728 SET_FLAG(peer->filter_override[afi][safi][direct],
5729 PEER_FT_DISTRIBUTE_LIST);
5730 peer_on_policy_change(peer, afi, safi,
5731 (direct == FILTER_OUT) ? 1 : 0);
5732
5733 /* Skip peer-group mechanics for regular peers. */
5734 return 0;
5735 }
5736
5737 /*
5738 * Set configuration on all peer-group members, un less they are
5739 * explicitely overriding peer-group configuration.
5740 */
5741 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5742 /* Skip peers with overridden configuration. */
5743 if (CHECK_FLAG(member->filter_override[afi][safi][direct],
5744 PEER_FT_DISTRIBUTE_LIST))
5745 continue;
5746
5747 /* Set configuration on peer-group member. */
5748 filter = &member->filter[afi][safi];
5749 if (filter->dlist[direct].name)
5750 XFREE(MTYPE_BGP_FILTER_NAME,
5751 filter->dlist[direct].name);
5752 filter->dlist[direct].name =
5753 XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
5754 filter->dlist[direct].alist = access_list_lookup(afi, name);
5755
5756 /* Process peer route updates. */
5757 peer_on_policy_change(member, afi, safi,
5758 (direct == FILTER_OUT) ? 1 : 0);
5759 }
5760
5761 return 0;
5762 }
5763
5764 int peer_distribute_unset(struct peer *peer, afi_t afi, safi_t safi, int direct)
5765 {
5766 struct peer *member;
5767 struct bgp_filter *filter;
5768 struct listnode *node, *nnode;
5769
5770 if (direct != FILTER_IN && direct != FILTER_OUT)
5771 return BGP_ERR_INVALID_VALUE;
5772
5773 /* Unset override-flag unconditionally. */
5774 UNSET_FLAG(peer->filter_override[afi][safi][direct],
5775 PEER_FT_DISTRIBUTE_LIST);
5776
5777 /* Inherit configuration from peer-group if peer is member. */
5778 if (peer_group_active(peer)) {
5779 PEER_STR_ATTR_INHERIT(peer, peer->group,
5780 filter[afi][safi].dlist[direct].name,
5781 MTYPE_BGP_FILTER_NAME);
5782 PEER_ATTR_INHERIT(peer, peer->group,
5783 filter[afi][safi].dlist[direct].alist);
5784 } else {
5785 /* Otherwise remove configuration from peer. */
5786 filter = &peer->filter[afi][safi];
5787 if (filter->dlist[direct].name)
5788 XFREE(MTYPE_BGP_FILTER_NAME,
5789 filter->dlist[direct].name);
5790 filter->dlist[direct].name = NULL;
5791 filter->dlist[direct].alist = NULL;
5792 }
5793
5794 /* Check if handling a regular peer. */
5795 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
5796 /* Process peer route updates. */
5797 peer_on_policy_change(peer, afi, safi,
5798 (direct == FILTER_OUT) ? 1 : 0);
5799
5800 /* Skip peer-group mechanics for regular peers. */
5801 return 0;
5802 }
5803
5804 /*
5805 * Remove configuration on all peer-group members, unless they are
5806 * explicitely overriding peer-group configuration.
5807 */
5808 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5809 /* Skip peers with overridden configuration. */
5810 if (CHECK_FLAG(member->filter_override[afi][safi][direct],
5811 PEER_FT_DISTRIBUTE_LIST))
5812 continue;
5813
5814 /* Remove configuration on peer-group member. */
5815 filter = &member->filter[afi][safi];
5816 if (filter->dlist[direct].name)
5817 XFREE(MTYPE_BGP_FILTER_NAME,
5818 filter->dlist[direct].name);
5819 filter->dlist[direct].name = NULL;
5820 filter->dlist[direct].alist = NULL;
5821
5822 /* Process peer route updates. */
5823 peer_on_policy_change(member, afi, safi,
5824 (direct == FILTER_OUT) ? 1 : 0);
5825 }
5826
5827 return 0;
5828 }
5829
5830 /* Update distribute list. */
5831 static void peer_distribute_update(struct access_list *access)
5832 {
5833 afi_t afi;
5834 safi_t safi;
5835 int direct;
5836 struct listnode *mnode, *mnnode;
5837 struct listnode *node, *nnode;
5838 struct bgp *bgp;
5839 struct peer *peer;
5840 struct peer_group *group;
5841 struct bgp_filter *filter;
5842
5843 for (ALL_LIST_ELEMENTS(bm->bgp, mnode, mnnode, bgp)) {
5844 if (access->name)
5845 update_group_policy_update(bgp, BGP_POLICY_FILTER_LIST,
5846 access->name, 0, 0);
5847 for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) {
5848 FOREACH_AFI_SAFI (afi, safi) {
5849 filter = &peer->filter[afi][safi];
5850
5851 for (direct = FILTER_IN; direct < FILTER_MAX;
5852 direct++) {
5853 if (filter->dlist[direct].name)
5854 filter->dlist[direct]
5855 .alist = access_list_lookup(
5856 afi,
5857 filter->dlist[direct]
5858 .name);
5859 else
5860 filter->dlist[direct].alist =
5861 NULL;
5862 }
5863 }
5864 }
5865 for (ALL_LIST_ELEMENTS(bgp->group, node, nnode, group)) {
5866 FOREACH_AFI_SAFI (afi, safi) {
5867 filter = &group->conf->filter[afi][safi];
5868
5869 for (direct = FILTER_IN; direct < FILTER_MAX;
5870 direct++) {
5871 if (filter->dlist[direct].name)
5872 filter->dlist[direct]
5873 .alist = access_list_lookup(
5874 afi,
5875 filter->dlist[direct]
5876 .name);
5877 else
5878 filter->dlist[direct].alist =
5879 NULL;
5880 }
5881 }
5882 }
5883 #ifdef ENABLE_BGP_VNC
5884 vnc_prefix_list_update(bgp);
5885 #endif
5886 }
5887 }
5888
5889 /* Set prefix list to the peer. */
5890 int peer_prefix_list_set(struct peer *peer, afi_t afi, safi_t safi, int direct,
5891 const char *name)
5892 {
5893 struct peer *member;
5894 struct bgp_filter *filter;
5895 struct listnode *node, *nnode;
5896
5897 if (direct != FILTER_IN && direct != FILTER_OUT)
5898 return BGP_ERR_INVALID_VALUE;
5899
5900 /* Set configuration on peer. */
5901 filter = &peer->filter[afi][safi];
5902 if (filter->dlist[direct].name)
5903 return BGP_ERR_PEER_FILTER_CONFLICT;
5904 if (filter->plist[direct].name)
5905 XFREE(MTYPE_BGP_FILTER_NAME, filter->plist[direct].name);
5906 filter->plist[direct].name = XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
5907 filter->plist[direct].plist = prefix_list_lookup(afi, name);
5908
5909 /* Check if handling a regular peer. */
5910 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
5911 /* Set override-flag and process peer route updates. */
5912 SET_FLAG(peer->filter_override[afi][safi][direct],
5913 PEER_FT_PREFIX_LIST);
5914 peer_on_policy_change(peer, afi, safi,
5915 (direct == FILTER_OUT) ? 1 : 0);
5916
5917 /* Skip peer-group mechanics for regular peers. */
5918 return 0;
5919 }
5920
5921 /*
5922 * Set configuration on all peer-group members, unless they are
5923 * explicitely overriding peer-group configuration.
5924 */
5925 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5926 /* Skip peers with overridden configuration. */
5927 if (CHECK_FLAG(member->filter_override[afi][safi][direct],
5928 PEER_FT_PREFIX_LIST))
5929 continue;
5930
5931 /* Set configuration on peer-group member. */
5932 filter = &member->filter[afi][safi];
5933 if (filter->plist[direct].name)
5934 XFREE(MTYPE_BGP_FILTER_NAME,
5935 filter->plist[direct].name);
5936 filter->plist[direct].name =
5937 XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
5938 filter->plist[direct].plist = prefix_list_lookup(afi, name);
5939
5940 /* Process peer route updates. */
5941 peer_on_policy_change(member, afi, safi,
5942 (direct == FILTER_OUT) ? 1 : 0);
5943 }
5944
5945 return 0;
5946 }
5947
5948 int peer_prefix_list_unset(struct peer *peer, afi_t afi, safi_t safi,
5949 int direct)
5950 {
5951 struct peer *member;
5952 struct bgp_filter *filter;
5953 struct listnode *node, *nnode;
5954
5955 if (direct != FILTER_IN && direct != FILTER_OUT)
5956 return BGP_ERR_INVALID_VALUE;
5957
5958 /* Unset override-flag unconditionally. */
5959 UNSET_FLAG(peer->filter_override[afi][safi][direct],
5960 PEER_FT_PREFIX_LIST);
5961
5962 /* Inherit configuration from peer-group if peer is member. */
5963 if (peer_group_active(peer)) {
5964 PEER_STR_ATTR_INHERIT(peer, peer->group,
5965 filter[afi][safi].plist[direct].name,
5966 MTYPE_BGP_FILTER_NAME);
5967 PEER_ATTR_INHERIT(peer, peer->group,
5968 filter[afi][safi].plist[direct].plist);
5969 } else {
5970 /* Otherwise remove configuration from peer. */
5971 filter = &peer->filter[afi][safi];
5972 if (filter->plist[direct].name)
5973 XFREE(MTYPE_BGP_FILTER_NAME,
5974 filter->plist[direct].name);
5975 filter->plist[direct].name = NULL;
5976 filter->plist[direct].plist = NULL;
5977 }
5978
5979 /* Check if handling a regular peer. */
5980 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
5981 /* Process peer route updates. */
5982 peer_on_policy_change(peer, afi, safi,
5983 (direct == FILTER_OUT) ? 1 : 0);
5984
5985 /* Skip peer-group mechanics for regular peers. */
5986 return 0;
5987 }
5988
5989 /*
5990 * Remove configuration on all peer-group members, unless they are
5991 * explicitely overriding peer-group configuration.
5992 */
5993 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5994 /* Skip peers with overridden configuration. */
5995 if (CHECK_FLAG(member->filter_override[afi][safi][direct],
5996 PEER_FT_PREFIX_LIST))
5997 continue;
5998
5999 /* Remove configuration on peer-group member. */
6000 filter = &member->filter[afi][safi];
6001 if (filter->plist[direct].name)
6002 XFREE(MTYPE_BGP_FILTER_NAME,
6003 filter->plist[direct].name);
6004 filter->plist[direct].name = NULL;
6005 filter->plist[direct].plist = NULL;
6006
6007 /* Process peer route updates. */
6008 peer_on_policy_change(member, afi, safi,
6009 (direct == FILTER_OUT) ? 1 : 0);
6010 }
6011
6012 return 0;
6013 }
6014
6015 /* Update prefix-list list. */
6016 static void peer_prefix_list_update(struct prefix_list *plist)
6017 {
6018 struct listnode *mnode, *mnnode;
6019 struct listnode *node, *nnode;
6020 struct bgp *bgp;
6021 struct peer *peer;
6022 struct peer_group *group;
6023 struct bgp_filter *filter;
6024 afi_t afi;
6025 safi_t safi;
6026 int direct;
6027
6028 for (ALL_LIST_ELEMENTS(bm->bgp, mnode, mnnode, bgp)) {
6029
6030 /*
6031 * Update the prefix-list on update groups.
6032 */
6033 update_group_policy_update(
6034 bgp, BGP_POLICY_PREFIX_LIST,
6035 plist ? prefix_list_name(plist) : NULL, 0, 0);
6036
6037 for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) {
6038 FOREACH_AFI_SAFI (afi, safi) {
6039 filter = &peer->filter[afi][safi];
6040
6041 for (direct = FILTER_IN; direct < FILTER_MAX;
6042 direct++) {
6043 if (filter->plist[direct].name)
6044 filter->plist[direct]
6045 .plist = prefix_list_lookup(
6046 afi,
6047 filter->plist[direct]
6048 .name);
6049 else
6050 filter->plist[direct].plist =
6051 NULL;
6052 }
6053 }
6054 }
6055 for (ALL_LIST_ELEMENTS(bgp->group, node, nnode, group)) {
6056 FOREACH_AFI_SAFI (afi, safi) {
6057 filter = &group->conf->filter[afi][safi];
6058
6059 for (direct = FILTER_IN; direct < FILTER_MAX;
6060 direct++) {
6061 if (filter->plist[direct].name)
6062 filter->plist[direct]
6063 .plist = prefix_list_lookup(
6064 afi,
6065 filter->plist[direct]
6066 .name);
6067 else
6068 filter->plist[direct].plist =
6069 NULL;
6070 }
6071 }
6072 }
6073 }
6074 }
6075
6076 int peer_aslist_set(struct peer *peer, afi_t afi, safi_t safi, int direct,
6077 const char *name)
6078 {
6079 struct peer *member;
6080 struct bgp_filter *filter;
6081 struct listnode *node, *nnode;
6082
6083 if (direct != FILTER_IN && direct != FILTER_OUT)
6084 return BGP_ERR_INVALID_VALUE;
6085
6086 /* Set configuration on peer. */
6087 filter = &peer->filter[afi][safi];
6088 if (filter->aslist[direct].name)
6089 XFREE(MTYPE_BGP_FILTER_NAME, filter->aslist[direct].name);
6090 filter->aslist[direct].name = XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
6091 filter->aslist[direct].aslist = as_list_lookup(name);
6092
6093 /* Check if handling a regular peer. */
6094 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6095 /* Set override-flag and process peer route updates. */
6096 SET_FLAG(peer->filter_override[afi][safi][direct],
6097 PEER_FT_FILTER_LIST);
6098 peer_on_policy_change(peer, afi, safi,
6099 (direct == FILTER_OUT) ? 1 : 0);
6100
6101 /* Skip peer-group mechanics for regular peers. */
6102 return 0;
6103 }
6104
6105 /*
6106 * Set configuration on all peer-group members, unless they are
6107 * explicitely overriding peer-group configuration.
6108 */
6109 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
6110 /* Skip peers with overridden configuration. */
6111 if (CHECK_FLAG(member->filter_override[afi][safi][direct],
6112 PEER_FT_FILTER_LIST))
6113 continue;
6114
6115 /* Set configuration on peer-group member. */
6116 filter = &member->filter[afi][safi];
6117 if (filter->aslist[direct].name)
6118 XFREE(MTYPE_BGP_FILTER_NAME,
6119 filter->aslist[direct].name);
6120 filter->aslist[direct].name =
6121 XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
6122 filter->aslist[direct].aslist = as_list_lookup(name);
6123
6124 /* Process peer route updates. */
6125 peer_on_policy_change(member, afi, safi,
6126 (direct == FILTER_OUT) ? 1 : 0);
6127 }
6128
6129 return 0;
6130 }
6131
6132 int peer_aslist_unset(struct peer *peer, afi_t afi, safi_t safi, int direct)
6133 {
6134 struct peer *member;
6135 struct bgp_filter *filter;
6136 struct listnode *node, *nnode;
6137
6138 if (direct != FILTER_IN && direct != FILTER_OUT)
6139 return BGP_ERR_INVALID_VALUE;
6140
6141 /* Unset override-flag unconditionally. */
6142 UNSET_FLAG(peer->filter_override[afi][safi][direct],
6143 PEER_FT_FILTER_LIST);
6144
6145 /* Inherit configuration from peer-group if peer is member. */
6146 if (peer_group_active(peer)) {
6147 PEER_STR_ATTR_INHERIT(peer, peer->group,
6148 filter[afi][safi].aslist[direct].name,
6149 MTYPE_BGP_FILTER_NAME);
6150 PEER_ATTR_INHERIT(peer, peer->group,
6151 filter[afi][safi].aslist[direct].aslist);
6152 } else {
6153 /* Otherwise remove configuration from peer. */
6154 filter = &peer->filter[afi][safi];
6155 if (filter->aslist[direct].name)
6156 XFREE(MTYPE_BGP_FILTER_NAME,
6157 filter->aslist[direct].name);
6158 filter->aslist[direct].name = NULL;
6159 filter->aslist[direct].aslist = NULL;
6160 }
6161
6162 /* Check if handling a regular peer. */
6163 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6164 /* Process peer route updates. */
6165 peer_on_policy_change(peer, afi, safi,
6166 (direct == FILTER_OUT) ? 1 : 0);
6167
6168 /* Skip peer-group mechanics for regular peers. */
6169 return 0;
6170 }
6171
6172 /*
6173 * Remove configuration on all peer-group members, unless they are
6174 * explicitely overriding peer-group configuration.
6175 */
6176 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
6177 /* Skip peers with overridden configuration. */
6178 if (CHECK_FLAG(member->filter_override[afi][safi][direct],
6179 PEER_FT_FILTER_LIST))
6180 continue;
6181
6182 /* Remove configuration on peer-group member. */
6183 filter = &member->filter[afi][safi];
6184 if (filter->aslist[direct].name)
6185 XFREE(MTYPE_BGP_FILTER_NAME,
6186 filter->aslist[direct].name);
6187 filter->aslist[direct].name = NULL;
6188 filter->aslist[direct].aslist = NULL;
6189
6190 /* Process peer route updates. */
6191 peer_on_policy_change(member, afi, safi,
6192 (direct == FILTER_OUT) ? 1 : 0);
6193 }
6194
6195 return 0;
6196 }
6197
6198 static void peer_aslist_update(const char *aslist_name)
6199 {
6200 afi_t afi;
6201 safi_t safi;
6202 int direct;
6203 struct listnode *mnode, *mnnode;
6204 struct listnode *node, *nnode;
6205 struct bgp *bgp;
6206 struct peer *peer;
6207 struct peer_group *group;
6208 struct bgp_filter *filter;
6209
6210 for (ALL_LIST_ELEMENTS(bm->bgp, mnode, mnnode, bgp)) {
6211 update_group_policy_update(bgp, BGP_POLICY_FILTER_LIST,
6212 aslist_name, 0, 0);
6213
6214 for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) {
6215 FOREACH_AFI_SAFI (afi, safi) {
6216 filter = &peer->filter[afi][safi];
6217
6218 for (direct = FILTER_IN; direct < FILTER_MAX;
6219 direct++) {
6220 if (filter->aslist[direct].name)
6221 filter->aslist[direct]
6222 .aslist = as_list_lookup(
6223 filter->aslist[direct]
6224 .name);
6225 else
6226 filter->aslist[direct].aslist =
6227 NULL;
6228 }
6229 }
6230 }
6231 for (ALL_LIST_ELEMENTS(bgp->group, node, nnode, group)) {
6232 FOREACH_AFI_SAFI (afi, safi) {
6233 filter = &group->conf->filter[afi][safi];
6234
6235 for (direct = FILTER_IN; direct < FILTER_MAX;
6236 direct++) {
6237 if (filter->aslist[direct].name)
6238 filter->aslist[direct]
6239 .aslist = as_list_lookup(
6240 filter->aslist[direct]
6241 .name);
6242 else
6243 filter->aslist[direct].aslist =
6244 NULL;
6245 }
6246 }
6247 }
6248 }
6249 }
6250
6251 static void peer_aslist_add(char *aslist_name)
6252 {
6253 peer_aslist_update(aslist_name);
6254 route_map_notify_dependencies(aslist_name, RMAP_EVENT_ASLIST_ADDED);
6255 }
6256
6257 static void peer_aslist_del(const char *aslist_name)
6258 {
6259 peer_aslist_update(aslist_name);
6260 route_map_notify_dependencies(aslist_name, RMAP_EVENT_ASLIST_DELETED);
6261 }
6262
6263
6264 int peer_route_map_set(struct peer *peer, afi_t afi, safi_t safi, int direct,
6265 const char *name, struct route_map *route_map)
6266 {
6267 struct peer *member;
6268 struct bgp_filter *filter;
6269 struct listnode *node, *nnode;
6270
6271 if (direct != RMAP_IN && direct != RMAP_OUT)
6272 return BGP_ERR_INVALID_VALUE;
6273
6274 /* Set configuration on peer. */
6275 filter = &peer->filter[afi][safi];
6276 if (filter->map[direct].name) {
6277 /* If the neighbor is configured with the same route-map
6278 * again then, ignore the duplicate configuration.
6279 */
6280 if (strcmp(filter->map[direct].name, name) == 0)
6281 return 0;
6282
6283 XFREE(MTYPE_BGP_FILTER_NAME, filter->map[direct].name);
6284 }
6285 route_map_counter_decrement(filter->map[direct].map);
6286 filter->map[direct].name = XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
6287 filter->map[direct].map = route_map;
6288 route_map_counter_increment(route_map);
6289
6290 /* Check if handling a regular peer. */
6291 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6292 /* Set override-flag and process peer route updates. */
6293 SET_FLAG(peer->filter_override[afi][safi][direct],
6294 PEER_FT_ROUTE_MAP);
6295 peer_on_policy_change(peer, afi, safi,
6296 (direct == RMAP_OUT) ? 1 : 0);
6297
6298 /* Skip peer-group mechanics for regular peers. */
6299 return 0;
6300 }
6301
6302 /*
6303 * Set configuration on all peer-group members, unless they are
6304 * explicitely overriding peer-group configuration.
6305 */
6306 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
6307 /* Skip peers with overridden configuration. */
6308 if (CHECK_FLAG(member->filter_override[afi][safi][direct],
6309 PEER_FT_ROUTE_MAP))
6310 continue;
6311
6312 /* Set configuration on peer-group member. */
6313 filter = &member->filter[afi][safi];
6314 if (filter->map[direct].name)
6315 XFREE(MTYPE_BGP_FILTER_NAME, filter->map[direct].name);
6316 route_map_counter_decrement(filter->map[direct].map);
6317 filter->map[direct].name = XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
6318 filter->map[direct].map = route_map;
6319 route_map_counter_increment(route_map);
6320
6321 /* Process peer route updates. */
6322 peer_on_policy_change(member, afi, safi,
6323 (direct == RMAP_OUT) ? 1 : 0);
6324 }
6325 return 0;
6326 }
6327
6328 /* Unset route-map from the peer. */
6329 int peer_route_map_unset(struct peer *peer, afi_t afi, safi_t safi, int direct)
6330 {
6331 struct peer *member;
6332 struct bgp_filter *filter;
6333 struct listnode *node, *nnode;
6334
6335 if (direct != RMAP_IN && direct != RMAP_OUT)
6336 return BGP_ERR_INVALID_VALUE;
6337
6338 /* Unset override-flag unconditionally. */
6339 UNSET_FLAG(peer->filter_override[afi][safi][direct], PEER_FT_ROUTE_MAP);
6340
6341 /* Inherit configuration from peer-group if peer is member. */
6342 if (peer_group_active(peer)) {
6343 PEER_STR_ATTR_INHERIT(peer, peer->group,
6344 filter[afi][safi].map[direct].name,
6345 MTYPE_BGP_FILTER_NAME);
6346 PEER_ATTR_INHERIT(peer, peer->group,
6347 filter[afi][safi].map[direct].map);
6348 } else {
6349 /* Otherwise remove configuration from peer. */
6350 filter = &peer->filter[afi][safi];
6351 if (filter->map[direct].name)
6352 XFREE(MTYPE_BGP_FILTER_NAME, filter->map[direct].name);
6353 route_map_counter_decrement(filter->map[direct].map);
6354 filter->map[direct].name = NULL;
6355 filter->map[direct].map = NULL;
6356 }
6357
6358 /* Check if handling a regular peer. */
6359 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6360 /* Process peer route updates. */
6361 peer_on_policy_change(peer, afi, safi,
6362 (direct == RMAP_OUT) ? 1 : 0);
6363
6364 /* Skip peer-group mechanics for regular peers. */
6365 return 0;
6366 }
6367
6368 /*
6369 * Remove configuration on all peer-group members, unless they are
6370 * explicitely overriding peer-group configuration.
6371 */
6372 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
6373 /* Skip peers with overridden configuration. */
6374 if (CHECK_FLAG(member->filter_override[afi][safi][direct],
6375 PEER_FT_ROUTE_MAP))
6376 continue;
6377
6378 /* Remove configuration on peer-group member. */
6379 filter = &member->filter[afi][safi];
6380 if (filter->map[direct].name)
6381 XFREE(MTYPE_BGP_FILTER_NAME, filter->map[direct].name);
6382 route_map_counter_decrement(filter->map[direct].map);
6383 filter->map[direct].name = NULL;
6384 filter->map[direct].map = NULL;
6385
6386 /* Process peer route updates. */
6387 peer_on_policy_change(member, afi, safi,
6388 (direct == RMAP_OUT) ? 1 : 0);
6389 }
6390
6391 return 0;
6392 }
6393
6394 /* Set unsuppress-map to the peer. */
6395 int peer_unsuppress_map_set(struct peer *peer, afi_t afi, safi_t safi,
6396 const char *name, struct route_map *route_map)
6397 {
6398 struct peer *member;
6399 struct bgp_filter *filter;
6400 struct listnode *node, *nnode;
6401
6402 /* Set configuration on peer. */
6403 filter = &peer->filter[afi][safi];
6404 if (filter->usmap.name)
6405 XFREE(MTYPE_BGP_FILTER_NAME, filter->usmap.name);
6406 route_map_counter_decrement(filter->usmap.map);
6407 filter->usmap.name = XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
6408 filter->usmap.map = route_map;
6409 route_map_counter_increment(route_map);
6410
6411 /* Check if handling a regular peer. */
6412 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6413 /* Set override-flag and process peer route updates. */
6414 SET_FLAG(peer->filter_override[afi][safi][0],
6415 PEER_FT_UNSUPPRESS_MAP);
6416 peer_on_policy_change(peer, afi, safi, 1);
6417
6418 /* Skip peer-group mechanics for regular peers. */
6419 return 0;
6420 }
6421
6422 /*
6423 * Set configuration on all peer-group members, unless they are
6424 * explicitely overriding peer-group configuration.
6425 */
6426 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
6427 /* Skip peers with overridden configuration. */
6428 if (CHECK_FLAG(member->filter_override[afi][safi][0],
6429 PEER_FT_UNSUPPRESS_MAP))
6430 continue;
6431
6432 /* Set configuration on peer-group member. */
6433 filter = &member->filter[afi][safi];
6434 if (filter->usmap.name)
6435 XFREE(MTYPE_BGP_FILTER_NAME, filter->usmap.name);
6436 route_map_counter_decrement(filter->usmap.map);
6437 filter->usmap.name = XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
6438 filter->usmap.map = route_map;
6439 route_map_counter_increment(route_map);
6440
6441 /* Process peer route updates. */
6442 peer_on_policy_change(member, afi, safi, 1);
6443 }
6444
6445 return 0;
6446 }
6447
6448 /* Unset route-map from the peer. */
6449 int peer_unsuppress_map_unset(struct peer *peer, afi_t afi, safi_t safi)
6450 {
6451 struct peer *member;
6452 struct bgp_filter *filter;
6453 struct listnode *node, *nnode;
6454
6455 /* Unset override-flag unconditionally. */
6456 UNSET_FLAG(peer->filter_override[afi][safi][0], PEER_FT_UNSUPPRESS_MAP);
6457
6458 /* Inherit configuration from peer-group if peer is member. */
6459 if (peer_group_active(peer)) {
6460 PEER_STR_ATTR_INHERIT(peer, peer->group,
6461 filter[afi][safi].usmap.name,
6462 MTYPE_BGP_FILTER_NAME);
6463 PEER_ATTR_INHERIT(peer, peer->group,
6464 filter[afi][safi].usmap.map);
6465 } else {
6466 /* Otherwise remove configuration from peer. */
6467 filter = &peer->filter[afi][safi];
6468 if (filter->usmap.name)
6469 XFREE(MTYPE_BGP_FILTER_NAME, filter->usmap.name);
6470 route_map_counter_decrement(filter->usmap.map);
6471 filter->usmap.name = NULL;
6472 filter->usmap.map = NULL;
6473 }
6474
6475 /* Check if handling a regular peer. */
6476 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6477 /* Process peer route updates. */
6478 peer_on_policy_change(peer, afi, safi, 1);
6479
6480 /* Skip peer-group mechanics for regular peers. */
6481 return 0;
6482 }
6483
6484 /*
6485 * Remove configuration on all peer-group members, unless they are
6486 * explicitely overriding peer-group configuration.
6487 */
6488 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
6489 /* Skip peers with overridden configuration. */
6490 if (CHECK_FLAG(member->filter_override[afi][safi][0],
6491 PEER_FT_UNSUPPRESS_MAP))
6492 continue;
6493
6494 /* Remove configuration on peer-group member. */
6495 filter = &member->filter[afi][safi];
6496 if (filter->usmap.name)
6497 XFREE(MTYPE_BGP_FILTER_NAME, filter->usmap.name);
6498 route_map_counter_decrement(filter->usmap.map);
6499 filter->usmap.name = NULL;
6500 filter->usmap.map = NULL;
6501
6502 /* Process peer route updates. */
6503 peer_on_policy_change(member, afi, safi, 1);
6504 }
6505
6506 return 0;
6507 }
6508
6509 int peer_maximum_prefix_set(struct peer *peer, afi_t afi, safi_t safi,
6510 uint32_t max, uint8_t threshold, int warning,
6511 uint16_t restart, bool force)
6512 {
6513 struct peer *member;
6514 struct listnode *node, *nnode;
6515
6516 /* Set flags and configuration on peer. */
6517 peer_af_flag_set(peer, afi, safi, PEER_FLAG_MAX_PREFIX);
6518
6519 if (force)
6520 peer_af_flag_set(peer, afi, safi, PEER_FLAG_MAX_PREFIX_FORCE);
6521 else
6522 peer_af_flag_unset(peer, afi, safi, PEER_FLAG_MAX_PREFIX_FORCE);
6523
6524 if (warning)
6525 peer_af_flag_set(peer, afi, safi, PEER_FLAG_MAX_PREFIX_WARNING);
6526 else
6527 peer_af_flag_unset(peer, afi, safi,
6528 PEER_FLAG_MAX_PREFIX_WARNING);
6529
6530 peer->pmax[afi][safi] = max;
6531 peer->pmax_threshold[afi][safi] = threshold;
6532 peer->pmax_restart[afi][safi] = restart;
6533
6534 /* Check if handling a regular peer. */
6535 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6536 /* Re-check if peer violates maximum-prefix. */
6537 if ((peer->status == Established) && (peer->afc[afi][safi]))
6538 bgp_maximum_prefix_overflow(peer, afi, safi, 1);
6539
6540 /* Skip peer-group mechanics for regular peers. */
6541 return 0;
6542 }
6543
6544 /*
6545 * Set flags and configuration on all peer-group members, unless they
6546 * are explicitely overriding peer-group configuration.
6547 */
6548 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
6549 /* Skip peers with overridden configuration. */
6550 if (CHECK_FLAG(member->af_flags_override[afi][safi],
6551 PEER_FLAG_MAX_PREFIX))
6552 continue;
6553
6554 /* Set flag and configuration on peer-group member. */
6555 member->pmax[afi][safi] = max;
6556 member->pmax_threshold[afi][safi] = threshold;
6557 member->pmax_restart[afi][safi] = restart;
6558
6559 if (force)
6560 SET_FLAG(member->af_flags[afi][safi],
6561 PEER_FLAG_MAX_PREFIX_FORCE);
6562 else
6563 UNSET_FLAG(member->af_flags[afi][safi],
6564 PEER_FLAG_MAX_PREFIX_FORCE);
6565
6566 if (warning)
6567 SET_FLAG(member->af_flags[afi][safi],
6568 PEER_FLAG_MAX_PREFIX_WARNING);
6569 else
6570 UNSET_FLAG(member->af_flags[afi][safi],
6571 PEER_FLAG_MAX_PREFIX_WARNING);
6572
6573 /* Re-check if peer violates maximum-prefix. */
6574 if ((member->status == Established) && (member->afc[afi][safi]))
6575 bgp_maximum_prefix_overflow(member, afi, safi, 1);
6576 }
6577
6578 return 0;
6579 }
6580
6581 int peer_maximum_prefix_unset(struct peer *peer, afi_t afi, safi_t safi)
6582 {
6583 /* Inherit configuration from peer-group if peer is member. */
6584 if (peer_group_active(peer)) {
6585 peer_af_flag_inherit(peer, afi, safi, PEER_FLAG_MAX_PREFIX);
6586 peer_af_flag_inherit(peer, afi, safi,
6587 PEER_FLAG_MAX_PREFIX_FORCE);
6588 peer_af_flag_inherit(peer, afi, safi,
6589 PEER_FLAG_MAX_PREFIX_WARNING);
6590 PEER_ATTR_INHERIT(peer, peer->group, pmax[afi][safi]);
6591 PEER_ATTR_INHERIT(peer, peer->group, pmax_threshold[afi][safi]);
6592 PEER_ATTR_INHERIT(peer, peer->group, pmax_restart[afi][safi]);
6593
6594 return 0;
6595 }
6596
6597 /* Remove flags and configuration from peer. */
6598 peer_af_flag_unset(peer, afi, safi, PEER_FLAG_MAX_PREFIX);
6599 peer_af_flag_unset(peer, afi, safi, PEER_FLAG_MAX_PREFIX_FORCE);
6600 peer_af_flag_unset(peer, afi, safi, PEER_FLAG_MAX_PREFIX_WARNING);
6601 peer->pmax[afi][safi] = 0;
6602 peer->pmax_threshold[afi][safi] = 0;
6603 peer->pmax_restart[afi][safi] = 0;
6604
6605 /*
6606 * Remove flags and configuration from all peer-group members, unless
6607 * they are explicitely overriding peer-group configuration.
6608 */
6609 if (CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6610 struct peer *member;
6611 struct listnode *node;
6612
6613 for (ALL_LIST_ELEMENTS_RO(peer->group->peer, node, member)) {
6614 /* Skip peers with overridden configuration. */
6615 if (CHECK_FLAG(member->af_flags_override[afi][safi],
6616 PEER_FLAG_MAX_PREFIX))
6617 continue;
6618
6619 /* Remove flag and configuration on peer-group member.
6620 */
6621 UNSET_FLAG(member->af_flags[afi][safi],
6622 PEER_FLAG_MAX_PREFIX);
6623 UNSET_FLAG(member->af_flags[afi][safi],
6624 PEER_FLAG_MAX_PREFIX_FORCE);
6625 UNSET_FLAG(member->af_flags[afi][safi],
6626 PEER_FLAG_MAX_PREFIX_WARNING);
6627 member->pmax[afi][safi] = 0;
6628 member->pmax_threshold[afi][safi] = 0;
6629 member->pmax_restart[afi][safi] = 0;
6630 }
6631 }
6632
6633 return 0;
6634 }
6635
6636 int is_ebgp_multihop_configured(struct peer *peer)
6637 {
6638 struct peer_group *group;
6639 struct listnode *node, *nnode;
6640 struct peer *peer1;
6641
6642 if (CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6643 group = peer->group;
6644 if ((peer_sort(peer) != BGP_PEER_IBGP)
6645 && (group->conf->ttl != BGP_DEFAULT_TTL))
6646 return 1;
6647
6648 for (ALL_LIST_ELEMENTS(group->peer, node, nnode, peer1)) {
6649 if ((peer_sort(peer1) != BGP_PEER_IBGP)
6650 && (peer1->ttl != BGP_DEFAULT_TTL))
6651 return 1;
6652 }
6653 } else {
6654 if ((peer_sort(peer) != BGP_PEER_IBGP)
6655 && (peer->ttl != BGP_DEFAULT_TTL))
6656 return 1;
6657 }
6658 return 0;
6659 }
6660
6661 /* Set # of hops between us and BGP peer. */
6662 int peer_ttl_security_hops_set(struct peer *peer, int gtsm_hops)
6663 {
6664 struct peer_group *group;
6665 struct listnode *node, *nnode;
6666 int ret;
6667
6668 zlog_debug("peer_ttl_security_hops_set: set gtsm_hops to %d for %s",
6669 gtsm_hops, peer->host);
6670
6671 /* We cannot configure ttl-security hops when ebgp-multihop is already
6672 set. For non peer-groups, the check is simple. For peer-groups,
6673 it's
6674 slightly messy, because we need to check both the peer-group
6675 structure
6676 and all peer-group members for any trace of ebgp-multihop
6677 configuration
6678 before actually applying the ttl-security rules. Cisco really made a
6679 mess of this configuration parameter, and OpenBGPD got it right.
6680 */
6681
6682 if ((peer->gtsm_hops == BGP_GTSM_HOPS_DISABLED)
6683 && (peer->sort != BGP_PEER_IBGP)) {
6684 if (is_ebgp_multihop_configured(peer))
6685 return BGP_ERR_NO_EBGP_MULTIHOP_WITH_TTLHACK;
6686
6687 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6688 peer->gtsm_hops = gtsm_hops;
6689
6690 /* Calling ebgp multihop also resets the session.
6691 * On restart, NHT will get setup correctly as will the
6692 * min & max ttls on the socket. The return value is
6693 * irrelevant.
6694 */
6695 ret = peer_ebgp_multihop_set(peer, MAXTTL);
6696
6697 if (ret != 0)
6698 return ret;
6699 } else {
6700 group = peer->group;
6701 for (ALL_LIST_ELEMENTS(group->peer, node, nnode,
6702 peer)) {
6703 peer->gtsm_hops = group->conf->gtsm_hops;
6704
6705 /* Calling ebgp multihop also resets the
6706 * session.
6707 * On restart, NHT will get setup correctly as
6708 * will the
6709 * min & max ttls on the socket. The return
6710 * value is
6711 * irrelevant.
6712 */
6713 peer_ebgp_multihop_set(peer, MAXTTL);
6714 }
6715 }
6716 } else {
6717 /* Post the first gtsm setup or if its ibgp, maxttl setting
6718 * isn't
6719 * necessary, just set the minttl.
6720 */
6721 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6722 peer->gtsm_hops = gtsm_hops;
6723
6724 if (peer->fd >= 0)
6725 sockopt_minttl(peer->su.sa.sa_family, peer->fd,
6726 MAXTTL + 1 - gtsm_hops);
6727 if ((peer->status < Established) && peer->doppelganger
6728 && (peer->doppelganger->fd >= 0))
6729 sockopt_minttl(peer->su.sa.sa_family,
6730 peer->doppelganger->fd,
6731 MAXTTL + 1 - gtsm_hops);
6732 } else {
6733 group = peer->group;
6734 for (ALL_LIST_ELEMENTS(group->peer, node, nnode,
6735 peer)) {
6736 peer->gtsm_hops = group->conf->gtsm_hops;
6737
6738 /* Change setting of existing peer
6739 * established then change value (may break
6740 * connectivity)
6741 * not established yet (teardown session and
6742 * restart)
6743 * no session then do nothing (will get
6744 * handled by next connection)
6745 */
6746 if (peer->fd >= 0
6747 && peer->gtsm_hops
6748 != BGP_GTSM_HOPS_DISABLED)
6749 sockopt_minttl(
6750 peer->su.sa.sa_family, peer->fd,
6751 MAXTTL + 1 - peer->gtsm_hops);
6752 if ((peer->status < Established)
6753 && peer->doppelganger
6754 && (peer->doppelganger->fd >= 0))
6755 sockopt_minttl(peer->su.sa.sa_family,
6756 peer->doppelganger->fd,
6757 MAXTTL + 1 - gtsm_hops);
6758 }
6759 }
6760 }
6761
6762 return 0;
6763 }
6764
6765 int peer_ttl_security_hops_unset(struct peer *peer)
6766 {
6767 struct peer_group *group;
6768 struct listnode *node, *nnode;
6769 int ret = 0;
6770
6771 zlog_debug("peer_ttl_security_hops_unset: set gtsm_hops to zero for %s",
6772 peer->host);
6773
6774 /* if a peer-group member, then reset to peer-group default rather than
6775 * 0 */
6776 if (peer_group_active(peer))
6777 peer->gtsm_hops = peer->group->conf->gtsm_hops;
6778 else
6779 peer->gtsm_hops = BGP_GTSM_HOPS_DISABLED;
6780
6781 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6782 /* Invoking ebgp_multihop_set will set the TTL back to the
6783 * original
6784 * value as well as restting the NHT and such. The session is
6785 * reset.
6786 */
6787 if (peer->sort == BGP_PEER_EBGP)
6788 ret = peer_ebgp_multihop_unset(peer);
6789 else {
6790 if (peer->fd >= 0)
6791 sockopt_minttl(peer->su.sa.sa_family, peer->fd,
6792 0);
6793
6794 if ((peer->status < Established) && peer->doppelganger
6795 && (peer->doppelganger->fd >= 0))
6796 sockopt_minttl(peer->su.sa.sa_family,
6797 peer->doppelganger->fd, 0);
6798 }
6799 } else {
6800 group = peer->group;
6801 for (ALL_LIST_ELEMENTS(group->peer, node, nnode, peer)) {
6802 peer->gtsm_hops = BGP_GTSM_HOPS_DISABLED;
6803 if (peer->sort == BGP_PEER_EBGP)
6804 ret = peer_ebgp_multihop_unset(peer);
6805 else {
6806 if (peer->fd >= 0)
6807 sockopt_minttl(peer->su.sa.sa_family,
6808 peer->fd, 0);
6809
6810 if ((peer->status < Established)
6811 && peer->doppelganger
6812 && (peer->doppelganger->fd >= 0))
6813 sockopt_minttl(peer->su.sa.sa_family,
6814 peer->doppelganger->fd,
6815 0);
6816 }
6817 }
6818 }
6819
6820 return ret;
6821 }
6822
6823 /*
6824 * If peer clear is invoked in a loop for all peers on the BGP instance,
6825 * it may end up freeing the doppelganger, and if this was the next node
6826 * to the current node, we would end up accessing the freed next node.
6827 * Pass along additional parameter which can be updated if next node
6828 * is freed; only required when walking the peer list on BGP instance.
6829 */
6830 int peer_clear(struct peer *peer, struct listnode **nnode)
6831 {
6832 if (!CHECK_FLAG(peer->flags, PEER_FLAG_SHUTDOWN)
6833 || !CHECK_FLAG(peer->bgp->flags, BGP_FLAG_SHUTDOWN)) {
6834 if (CHECK_FLAG(peer->sflags, PEER_STATUS_PREFIX_OVERFLOW)) {
6835 UNSET_FLAG(peer->sflags, PEER_STATUS_PREFIX_OVERFLOW);
6836 if (peer->t_pmax_restart) {
6837 BGP_TIMER_OFF(peer->t_pmax_restart);
6838 if (bgp_debug_neighbor_events(peer))
6839 zlog_debug(
6840 "%s Maximum-prefix restart timer canceled",
6841 peer->host);
6842 }
6843 BGP_EVENT_ADD(peer, BGP_Start);
6844 return 0;
6845 }
6846
6847 peer->v_start = BGP_INIT_START_TIMER;
6848 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status))
6849 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
6850 BGP_NOTIFY_CEASE_ADMIN_RESET);
6851 else
6852 bgp_session_reset_safe(peer, nnode);
6853 }
6854 return 0;
6855 }
6856
6857 int peer_clear_soft(struct peer *peer, afi_t afi, safi_t safi,
6858 enum bgp_clear_type stype)
6859 {
6860 struct peer_af *paf;
6861
6862 if (peer->status != Established)
6863 return 0;
6864
6865 if (!peer->afc[afi][safi])
6866 return BGP_ERR_AF_UNCONFIGURED;
6867
6868 peer->rtt = sockopt_tcp_rtt(peer->fd);
6869
6870 if (stype == BGP_CLEAR_SOFT_OUT || stype == BGP_CLEAR_SOFT_BOTH) {
6871 /* Clear the "neighbor x.x.x.x default-originate" flag */
6872 paf = peer_af_find(peer, afi, safi);
6873 if (paf && paf->subgroup
6874 && CHECK_FLAG(paf->subgroup->sflags,
6875 SUBGRP_STATUS_DEFAULT_ORIGINATE))
6876 UNSET_FLAG(paf->subgroup->sflags,
6877 SUBGRP_STATUS_DEFAULT_ORIGINATE);
6878
6879 bgp_announce_route(peer, afi, safi);
6880 }
6881
6882 if (stype == BGP_CLEAR_SOFT_IN_ORF_PREFIX) {
6883 if (CHECK_FLAG(peer->af_cap[afi][safi],
6884 PEER_CAP_ORF_PREFIX_SM_ADV)
6885 && (CHECK_FLAG(peer->af_cap[afi][safi],
6886 PEER_CAP_ORF_PREFIX_RM_RCV)
6887 || CHECK_FLAG(peer->af_cap[afi][safi],
6888 PEER_CAP_ORF_PREFIX_RM_OLD_RCV))) {
6889 struct bgp_filter *filter = &peer->filter[afi][safi];
6890 uint8_t prefix_type;
6891
6892 if (CHECK_FLAG(peer->af_cap[afi][safi],
6893 PEER_CAP_ORF_PREFIX_RM_RCV))
6894 prefix_type = ORF_TYPE_PREFIX;
6895 else
6896 prefix_type = ORF_TYPE_PREFIX_OLD;
6897
6898 if (filter->plist[FILTER_IN].plist) {
6899 if (CHECK_FLAG(peer->af_sflags[afi][safi],
6900 PEER_STATUS_ORF_PREFIX_SEND))
6901 bgp_route_refresh_send(
6902 peer, afi, safi, prefix_type,
6903 REFRESH_DEFER, 1);
6904 bgp_route_refresh_send(peer, afi, safi,
6905 prefix_type,
6906 REFRESH_IMMEDIATE, 0);
6907 } else {
6908 if (CHECK_FLAG(peer->af_sflags[afi][safi],
6909 PEER_STATUS_ORF_PREFIX_SEND))
6910 bgp_route_refresh_send(
6911 peer, afi, safi, prefix_type,
6912 REFRESH_IMMEDIATE, 1);
6913 else
6914 bgp_route_refresh_send(peer, afi, safi,
6915 0, 0, 0);
6916 }
6917 return 0;
6918 }
6919 }
6920
6921 if (stype == BGP_CLEAR_SOFT_IN || stype == BGP_CLEAR_SOFT_BOTH
6922 || stype == BGP_CLEAR_SOFT_IN_ORF_PREFIX) {
6923 /* If neighbor has soft reconfiguration inbound flag.
6924 Use Adj-RIB-In database. */
6925 if (CHECK_FLAG(peer->af_flags[afi][safi],
6926 PEER_FLAG_SOFT_RECONFIG))
6927 bgp_soft_reconfig_in(peer, afi, safi);
6928 else {
6929 /* If neighbor has route refresh capability, send route
6930 refresh
6931 message to the peer. */
6932 if (CHECK_FLAG(peer->cap, PEER_CAP_REFRESH_OLD_RCV)
6933 || CHECK_FLAG(peer->cap, PEER_CAP_REFRESH_NEW_RCV))
6934 bgp_route_refresh_send(peer, afi, safi, 0, 0,
6935 0);
6936 else
6937 return BGP_ERR_SOFT_RECONFIG_UNCONFIGURED;
6938 }
6939 }
6940 return 0;
6941 }
6942
6943 /* Display peer uptime.*/
6944 char *peer_uptime(time_t uptime2, char *buf, size_t len, bool use_json,
6945 json_object *json)
6946 {
6947 time_t uptime1, epoch_tbuf;
6948 struct tm tm;
6949
6950 /* If there is no connection has been done before print `never'. */
6951 if (uptime2 == 0) {
6952 if (use_json) {
6953 json_object_string_add(json, "peerUptime", "never");
6954 json_object_int_add(json, "peerUptimeMsec", 0);
6955 } else
6956 snprintf(buf, len, "never");
6957 return buf;
6958 }
6959
6960 /* Get current time. */
6961 uptime1 = bgp_clock();
6962 uptime1 -= uptime2;
6963 gmtime_r(&uptime1, &tm);
6964
6965 if (uptime1 < ONE_DAY_SECOND)
6966 snprintf(buf, len, "%02d:%02d:%02d", tm.tm_hour, tm.tm_min,
6967 tm.tm_sec);
6968 else if (uptime1 < ONE_WEEK_SECOND)
6969 snprintf(buf, len, "%dd%02dh%02dm", tm.tm_yday, tm.tm_hour,
6970 tm.tm_min);
6971 else if (uptime1 < ONE_YEAR_SECOND)
6972 snprintf(buf, len, "%02dw%dd%02dh", tm.tm_yday / 7,
6973 tm.tm_yday - ((tm.tm_yday / 7) * 7), tm.tm_hour);
6974 else
6975 snprintf(buf, len, "%02dy%02dw%dd", tm.tm_year - 70,
6976 tm.tm_yday / 7,
6977 tm.tm_yday - ((tm.tm_yday / 7) * 7));
6978
6979 if (use_json) {
6980 epoch_tbuf = time(NULL) - uptime1;
6981 json_object_string_add(json, "peerUptime", buf);
6982 json_object_int_add(json, "peerUptimeMsec", uptime1 * 1000);
6983 json_object_int_add(json, "peerUptimeEstablishedEpoch",
6984 epoch_tbuf);
6985 }
6986
6987 return buf;
6988 }
6989
6990 void bgp_master_init(struct thread_master *master, const int buffer_size)
6991 {
6992 qobj_init();
6993
6994 memset(&bgp_master, 0, sizeof(struct bgp_master));
6995
6996 bm = &bgp_master;
6997 bm->bgp = list_new();
6998 bm->listen_sockets = list_new();
6999 bm->port = BGP_PORT_DEFAULT;
7000 bm->master = master;
7001 bm->start_time = bgp_clock();
7002 bm->t_rmap_update = NULL;
7003 bm->rmap_update_timer = RMAP_DEFAULT_UPDATE_TIMER;
7004 bm->terminating = false;
7005 bm->socket_buffer = buffer_size;
7006
7007 bgp_process_queue_init();
7008
7009 bgp_mac_init();
7010 /* init the rd id space.
7011 assign 0th index in the bitfield,
7012 so that we start with id 1
7013 */
7014 bf_init(bm->rd_idspace, UINT16_MAX);
7015 bf_assign_zero_index(bm->rd_idspace);
7016
7017 /* mpls label dynamic allocation pool */
7018 bgp_lp_init(bm->master, &bm->labelpool);
7019
7020 bgp_evpn_mh_init();
7021 QOBJ_REG(bm, bgp_master);
7022 }
7023
7024 /*
7025 * Free up connected routes and interfaces for a BGP instance. Invoked upon
7026 * instance delete (non-default only) or BGP exit.
7027 */
7028 static void bgp_if_finish(struct bgp *bgp)
7029 {
7030 struct vrf *vrf;
7031 struct interface *ifp;
7032
7033 vrf = bgp_vrf_lookup_by_instance_type(bgp);
7034
7035 if (bgp->inst_type == BGP_INSTANCE_TYPE_VIEW || !vrf)
7036 return;
7037
7038 FOR_ALL_INTERFACES (vrf, ifp) {
7039 struct listnode *c_node, *c_nnode;
7040 struct connected *c;
7041
7042 for (ALL_LIST_ELEMENTS(ifp->connected, c_node, c_nnode, c))
7043 bgp_connected_delete(bgp, c);
7044 }
7045 }
7046
7047 static void bgp_viewvrf_autocomplete(vector comps, struct cmd_token *token)
7048 {
7049 struct vrf *vrf = NULL;
7050 struct listnode *next;
7051 struct bgp *bgp;
7052
7053 RB_FOREACH (vrf, vrf_name_head, &vrfs_by_name)
7054 vector_set(comps, XSTRDUP(MTYPE_COMPLETION, vrf->name));
7055
7056 for (ALL_LIST_ELEMENTS_RO(bm->bgp, next, bgp)) {
7057 if (bgp->inst_type != BGP_INSTANCE_TYPE_VIEW)
7058 continue;
7059
7060 vector_set(comps, XSTRDUP(MTYPE_COMPLETION, bgp->name));
7061 }
7062 }
7063
7064 static void bgp_instasn_autocomplete(vector comps, struct cmd_token *token)
7065 {
7066 struct listnode *next, *next2;
7067 struct bgp *bgp, *bgp2;
7068 char buf[11];
7069
7070 for (ALL_LIST_ELEMENTS_RO(bm->bgp, next, bgp)) {
7071 /* deduplicate */
7072 for (ALL_LIST_ELEMENTS_RO(bm->bgp, next2, bgp2)) {
7073 if (bgp2->as == bgp->as)
7074 break;
7075 if (bgp2 == bgp)
7076 break;
7077 }
7078 if (bgp2 != bgp)
7079 continue;
7080
7081 snprintf(buf, sizeof(buf), "%u", bgp->as);
7082 vector_set(comps, XSTRDUP(MTYPE_COMPLETION, buf));
7083 }
7084 }
7085
7086 static const struct cmd_variable_handler bgp_viewvrf_var_handlers[] = {
7087 {.tokenname = "VIEWVRFNAME", .completions = bgp_viewvrf_autocomplete},
7088 {.varname = "instasn", .completions = bgp_instasn_autocomplete},
7089 {.completions = NULL},
7090 };
7091
7092 struct frr_pthread *bgp_pth_io;
7093 struct frr_pthread *bgp_pth_ka;
7094
7095 static void bgp_pthreads_init(void)
7096 {
7097 assert(!bgp_pth_io);
7098 assert(!bgp_pth_ka);
7099
7100 struct frr_pthread_attr io = {
7101 .start = frr_pthread_attr_default.start,
7102 .stop = frr_pthread_attr_default.stop,
7103 };
7104 struct frr_pthread_attr ka = {
7105 .start = bgp_keepalives_start,
7106 .stop = bgp_keepalives_stop,
7107 };
7108 bgp_pth_io = frr_pthread_new(&io, "BGP I/O thread", "bgpd_io");
7109 bgp_pth_ka = frr_pthread_new(&ka, "BGP Keepalives thread", "bgpd_ka");
7110 }
7111
7112 void bgp_pthreads_run(void)
7113 {
7114 frr_pthread_run(bgp_pth_io, NULL);
7115 frr_pthread_run(bgp_pth_ka, NULL);
7116
7117 /* Wait until threads are ready. */
7118 frr_pthread_wait_running(bgp_pth_io);
7119 frr_pthread_wait_running(bgp_pth_ka);
7120 }
7121
7122 void bgp_pthreads_finish(void)
7123 {
7124 frr_pthread_stop_all();
7125 }
7126
7127 void bgp_init(unsigned short instance)
7128 {
7129
7130 /* allocates some vital data structures used by peer commands in
7131 * vty_init */
7132
7133 /* pre-init pthreads */
7134 bgp_pthreads_init();
7135
7136 /* Init zebra. */
7137 bgp_zebra_init(bm->master, instance);
7138
7139 #ifdef ENABLE_BGP_VNC
7140 vnc_zebra_init(bm->master);
7141 #endif
7142
7143 /* BGP VTY commands installation. */
7144 bgp_vty_init();
7145
7146 /* BGP inits. */
7147 bgp_attr_init();
7148 bgp_debug_init();
7149 bgp_dump_init();
7150 bgp_route_init();
7151 bgp_route_map_init();
7152 bgp_scan_vty_init();
7153 bgp_mplsvpn_init();
7154 #ifdef ENABLE_BGP_VNC
7155 rfapi_init();
7156 #endif
7157 bgp_ethernetvpn_init();
7158 bgp_flowspec_vty_init();
7159
7160 /* Access list initialize. */
7161 access_list_init();
7162 access_list_add_hook(peer_distribute_update);
7163 access_list_delete_hook(peer_distribute_update);
7164
7165 /* Filter list initialize. */
7166 bgp_filter_init();
7167 as_list_add_hook(peer_aslist_add);
7168 as_list_delete_hook(peer_aslist_del);
7169
7170 /* Prefix list initialize.*/
7171 prefix_list_init();
7172 prefix_list_add_hook(peer_prefix_list_update);
7173 prefix_list_delete_hook(peer_prefix_list_update);
7174
7175 /* Community list initialize. */
7176 bgp_clist = community_list_init();
7177
7178 /* BFD init */
7179 bgp_bfd_init();
7180
7181 cmd_variable_handler_register(bgp_viewvrf_var_handlers);
7182 }
7183
7184 void bgp_terminate(void)
7185 {
7186 struct bgp *bgp;
7187 struct peer *peer;
7188 struct listnode *node, *nnode;
7189 struct listnode *mnode, *mnnode;
7190
7191 QOBJ_UNREG(bm);
7192
7193 /* Close the listener sockets first as this prevents peers from
7194 * attempting
7195 * to reconnect on receiving the peer unconfig message. In the presence
7196 * of a large number of peers this will ensure that no peer is left with
7197 * a dangling connection
7198 */
7199 /* reverse bgp_master_init */
7200 bgp_close();
7201
7202 if (bm->listen_sockets)
7203 list_delete(&bm->listen_sockets);
7204
7205 for (ALL_LIST_ELEMENTS(bm->bgp, mnode, mnnode, bgp))
7206 for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer))
7207 if (peer->status == Established
7208 || peer->status == OpenSent
7209 || peer->status == OpenConfirm)
7210 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
7211 BGP_NOTIFY_CEASE_PEER_UNCONFIG);
7212
7213 if (bm->process_main_queue)
7214 work_queue_free_and_null(&bm->process_main_queue);
7215
7216 if (bm->t_rmap_update)
7217 BGP_TIMER_OFF(bm->t_rmap_update);
7218
7219 bgp_mac_finish();
7220 bgp_evpn_mh_finish();
7221 }
7222
7223 struct peer *peer_lookup_in_view(struct vty *vty, struct bgp *bgp,
7224 const char *ip_str, bool use_json)
7225 {
7226 int ret;
7227 struct peer *peer;
7228 union sockunion su;
7229
7230 /* Get peer sockunion. */
7231 ret = str2sockunion(ip_str, &su);
7232 if (ret < 0) {
7233 peer = peer_lookup_by_conf_if(bgp, ip_str);
7234 if (!peer) {
7235 peer = peer_lookup_by_hostname(bgp, ip_str);
7236
7237 if (!peer) {
7238 if (use_json) {
7239 json_object *json_no = NULL;
7240 json_no = json_object_new_object();
7241 json_object_string_add(
7242 json_no,
7243 "malformedAddressOrName",
7244 ip_str);
7245 vty_out(vty, "%s\n",
7246 json_object_to_json_string_ext(
7247 json_no,
7248 JSON_C_TO_STRING_PRETTY));
7249 json_object_free(json_no);
7250 } else
7251 vty_out(vty,
7252 "%% Malformed address or name: %s\n",
7253 ip_str);
7254 return NULL;
7255 }
7256 }
7257 return peer;
7258 }
7259
7260 /* Peer structure lookup. */
7261 peer = peer_lookup(bgp, &su);
7262 if (!peer) {
7263 if (use_json) {
7264 json_object *json_no = NULL;
7265 json_no = json_object_new_object();
7266 json_object_string_add(json_no, "warning",
7267 "No such neighbor in this view/vrf");
7268 vty_out(vty, "%s\n",
7269 json_object_to_json_string_ext(
7270 json_no, JSON_C_TO_STRING_PRETTY));
7271 json_object_free(json_no);
7272 } else
7273 vty_out(vty, "No such neighbor in this view/vrf\n");
7274 return NULL;
7275 }
7276
7277 return peer;
7278 }
7279
7280 void bgp_gr_apply_running_config(void)
7281 {
7282 struct peer *peer = NULL;
7283 struct bgp *bgp = NULL;
7284 struct listnode *node, *nnode;
7285 bool gr_router_detected = false;
7286
7287 if (BGP_DEBUG(graceful_restart, GRACEFUL_RESTART))
7288 zlog_debug("[BGP_GR] %s called !", __func__);
7289
7290 for (ALL_LIST_ELEMENTS(bm->bgp, node, nnode, bgp)) {
7291 for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) {
7292 bgp_peer_gr_flags_update(peer);
7293 if (CHECK_FLAG(peer->flags, PEER_FLAG_GRACEFUL_RESTART))
7294 gr_router_detected = true;
7295 }
7296
7297 if (gr_router_detected
7298 && bgp->present_zebra_gr_state == ZEBRA_GR_DISABLE) {
7299 bgp_zebra_send_capabilities(bgp, true);
7300 } else if (!gr_router_detected
7301 && bgp->present_zebra_gr_state == ZEBRA_GR_ENABLE) {
7302 bgp_zebra_send_capabilities(bgp, false);
7303 }
7304
7305 gr_router_detected = false;
7306 }
7307 }
FRRouting mirror