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Merge pull request #6872 from vincentbernat/fix/bgp4mib-vrf
[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_NEXTHOP_LOCAL_UNCHANGED, 0, peer_change_reset_out},
3906 {PEER_FLAG_FORCE_NEXTHOP_SELF, 1, peer_change_reset_out},
3907 {PEER_FLAG_REMOVE_PRIVATE_AS_ALL, 1, peer_change_reset_out},
3908 {PEER_FLAG_REMOVE_PRIVATE_AS_REPLACE, 1, peer_change_reset_out},
3909 {PEER_FLAG_AS_OVERRIDE, 1, peer_change_reset_out},
3910 {PEER_FLAG_REMOVE_PRIVATE_AS_ALL_REPLACE, 1, peer_change_reset_out},
3911 {PEER_FLAG_WEIGHT, 0, peer_change_reset_in},
3912 {0, 0, 0}};
3913
3914 /* Proper action set. */
3915 static int peer_flag_action_set(const struct peer_flag_action *action_list,
3916 int size, struct peer_flag_action *action,
3917 uint32_t flag)
3918 {
3919 int i;
3920 int found = 0;
3921 int reset_in = 0;
3922 int reset_out = 0;
3923 const struct peer_flag_action *match = NULL;
3924
3925 /* Check peer's frag action. */
3926 for (i = 0; i < size; i++) {
3927 match = &action_list[i];
3928
3929 if (match->flag == 0)
3930 break;
3931
3932 if (match->flag & flag) {
3933 found = 1;
3934
3935 if (match->type == peer_change_reset_in)
3936 reset_in = 1;
3937 if (match->type == peer_change_reset_out)
3938 reset_out = 1;
3939 if (match->type == peer_change_reset) {
3940 reset_in = 1;
3941 reset_out = 1;
3942 }
3943 if (match->not_for_member)
3944 action->not_for_member = 1;
3945 }
3946 }
3947
3948 /* Set peer clear type. */
3949 if (reset_in && reset_out)
3950 action->type = peer_change_reset;
3951 else if (reset_in)
3952 action->type = peer_change_reset_in;
3953 else if (reset_out)
3954 action->type = peer_change_reset_out;
3955 else
3956 action->type = peer_change_none;
3957
3958 return found;
3959 }
3960
3961 static void peer_flag_modify_action(struct peer *peer, uint32_t flag)
3962 {
3963 if (flag == PEER_FLAG_SHUTDOWN) {
3964 if (CHECK_FLAG(peer->flags, flag)) {
3965 if (CHECK_FLAG(peer->sflags, PEER_STATUS_NSF_WAIT))
3966 peer_nsf_stop(peer);
3967
3968 UNSET_FLAG(peer->sflags, PEER_STATUS_PREFIX_OVERFLOW);
3969 if (peer->t_pmax_restart) {
3970 BGP_TIMER_OFF(peer->t_pmax_restart);
3971 if (bgp_debug_neighbor_events(peer))
3972 zlog_debug(
3973 "%s Maximum-prefix restart timer canceled",
3974 peer->host);
3975 }
3976
3977 if (CHECK_FLAG(peer->sflags, PEER_STATUS_NSF_WAIT))
3978 peer_nsf_stop(peer);
3979
3980 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status)) {
3981 char *msg = peer->tx_shutdown_message;
3982 size_t msglen;
3983
3984 if (!msg && peer_group_active(peer))
3985 msg = peer->group->conf
3986 ->tx_shutdown_message;
3987 msglen = msg ? strlen(msg) : 0;
3988 if (msglen > 128)
3989 msglen = 128;
3990
3991 if (msglen) {
3992 uint8_t msgbuf[129];
3993
3994 msgbuf[0] = msglen;
3995 memcpy(msgbuf + 1, msg, msglen);
3996
3997 bgp_notify_send_with_data(
3998 peer, BGP_NOTIFY_CEASE,
3999 BGP_NOTIFY_CEASE_ADMIN_SHUTDOWN,
4000 msgbuf, msglen + 1);
4001 } else
4002 bgp_notify_send(
4003 peer, BGP_NOTIFY_CEASE,
4004 BGP_NOTIFY_CEASE_ADMIN_SHUTDOWN);
4005 } else
4006 bgp_session_reset(peer);
4007 } else {
4008 peer->v_start = BGP_INIT_START_TIMER;
4009 BGP_EVENT_ADD(peer, BGP_Stop);
4010 }
4011 } else if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status)) {
4012 if (flag == PEER_FLAG_DYNAMIC_CAPABILITY)
4013 peer->last_reset = PEER_DOWN_CAPABILITY_CHANGE;
4014 else if (flag == PEER_FLAG_PASSIVE)
4015 peer->last_reset = PEER_DOWN_PASSIVE_CHANGE;
4016 else if (flag == PEER_FLAG_DISABLE_CONNECTED_CHECK)
4017 peer->last_reset = PEER_DOWN_MULTIHOP_CHANGE;
4018
4019 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
4020 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4021 } else
4022 bgp_session_reset(peer);
4023 }
4024
4025 /* Change specified peer flag. */
4026 static int peer_flag_modify(struct peer *peer, uint32_t flag, int set)
4027 {
4028 int found;
4029 int size;
4030 bool invert, member_invert;
4031 struct peer *member;
4032 struct listnode *node, *nnode;
4033 struct peer_flag_action action;
4034
4035 memset(&action, 0, sizeof(struct peer_flag_action));
4036 size = sizeof(peer_flag_action_list) / sizeof(struct peer_flag_action);
4037
4038 invert = CHECK_FLAG(peer->flags_invert, flag);
4039 found = peer_flag_action_set(peer_flag_action_list, size, &action,
4040 flag);
4041
4042 /* Abort if no flag action exists. */
4043 if (!found)
4044 return BGP_ERR_INVALID_FLAG;
4045
4046 /* Check for flag conflict: STRICT_CAP_MATCH && OVERRIDE_CAPABILITY */
4047 if (set && CHECK_FLAG(peer->flags | flag, PEER_FLAG_STRICT_CAP_MATCH)
4048 && CHECK_FLAG(peer->flags | flag, PEER_FLAG_OVERRIDE_CAPABILITY))
4049 return BGP_ERR_PEER_FLAG_CONFLICT;
4050
4051 /* Handle flag updates where desired state matches current state. */
4052 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4053 if (set && CHECK_FLAG(peer->flags, flag)) {
4054 COND_FLAG(peer->flags_override, flag, !invert);
4055 return 0;
4056 }
4057
4058 if (!set && !CHECK_FLAG(peer->flags, flag)) {
4059 COND_FLAG(peer->flags_override, flag, invert);
4060 return 0;
4061 }
4062 }
4063
4064 /* Inherit from peer-group or set/unset flags accordingly. */
4065 if (peer_group_active(peer) && set == invert)
4066 peer_flag_inherit(peer, flag);
4067 else
4068 COND_FLAG(peer->flags, flag, set);
4069
4070 /* Check if handling a regular peer. */
4071 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4072 /* Update flag override state accordingly. */
4073 COND_FLAG(peer->flags_override, flag, set != invert);
4074
4075 /*
4076 * For the extended next-hop encoding flag we need to turn RAs
4077 * on if flag is being set, but only turn RAs off if the flag
4078 * is being unset on this peer and if this peer is a member of a
4079 * peer-group, the peer-group also doesn't have the flag set.
4080 */
4081 if (flag == PEER_FLAG_CAPABILITY_ENHE) {
4082 if (set) {
4083 bgp_zebra_initiate_radv(peer->bgp, peer);
4084 } else if (peer_group_active(peer)) {
4085 if (!CHECK_FLAG(peer->group->conf->flags, flag))
4086 bgp_zebra_terminate_radv(peer->bgp,
4087 peer);
4088 } else
4089 bgp_zebra_terminate_radv(peer->bgp, peer);
4090 }
4091
4092 /* Execute flag action on peer. */
4093 if (action.type == peer_change_reset)
4094 peer_flag_modify_action(peer, flag);
4095
4096 /* Skip peer-group mechanics for regular peers. */
4097 return 0;
4098 }
4099
4100 /*
4101 * Update peer-group members, unless they are explicitely overriding
4102 * peer-group configuration.
4103 */
4104 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
4105 /* Skip peers with overridden configuration. */
4106 if (CHECK_FLAG(member->flags_override, flag))
4107 continue;
4108
4109 /* Check if only member without group is inverted. */
4110 member_invert =
4111 CHECK_FLAG(member->flags_invert, flag) && !invert;
4112
4113 /* Skip peers with equivalent configuration. */
4114 if (set != member_invert && CHECK_FLAG(member->flags, flag))
4115 continue;
4116
4117 if (set == member_invert && !CHECK_FLAG(member->flags, flag))
4118 continue;
4119
4120 /* Update flag on peer-group member. */
4121 COND_FLAG(member->flags, flag, set != member_invert);
4122
4123 if (flag == PEER_FLAG_CAPABILITY_ENHE)
4124 set ? bgp_zebra_initiate_radv(member->bgp, member)
4125 : bgp_zebra_terminate_radv(member->bgp, member);
4126
4127 /* Execute flag action on peer-group member. */
4128 if (action.type == peer_change_reset)
4129 peer_flag_modify_action(member, flag);
4130 }
4131
4132 return 0;
4133 }
4134
4135 int peer_flag_set(struct peer *peer, uint32_t flag)
4136 {
4137 return peer_flag_modify(peer, flag, 1);
4138 }
4139
4140 int peer_flag_unset(struct peer *peer, uint32_t flag)
4141 {
4142 return peer_flag_modify(peer, flag, 0);
4143 }
4144
4145 static int peer_af_flag_modify(struct peer *peer, afi_t afi, safi_t safi,
4146 uint32_t flag, bool set)
4147 {
4148 int found;
4149 int size;
4150 bool invert, member_invert;
4151 struct peer *member;
4152 struct listnode *node, *nnode;
4153 struct peer_flag_action action;
4154 bgp_peer_sort_t ptype;
4155
4156 memset(&action, 0, sizeof(struct peer_flag_action));
4157 size = sizeof(peer_af_flag_action_list)
4158 / sizeof(struct peer_flag_action);
4159
4160 invert = CHECK_FLAG(peer->af_flags_invert[afi][safi], flag);
4161 found = peer_flag_action_set(peer_af_flag_action_list, size, &action,
4162 flag);
4163
4164 /* Abort if flag action exists. */
4165 if (!found)
4166 return BGP_ERR_INVALID_FLAG;
4167
4168 ptype = peer_sort(peer);
4169 /* Special check for reflector client. */
4170 if (flag & PEER_FLAG_REFLECTOR_CLIENT && ptype != BGP_PEER_IBGP)
4171 return BGP_ERR_NOT_INTERNAL_PEER;
4172
4173 /* Special check for remove-private-AS. */
4174 if (flag & PEER_FLAG_REMOVE_PRIVATE_AS && ptype == BGP_PEER_IBGP)
4175 return BGP_ERR_REMOVE_PRIVATE_AS;
4176
4177 /* as-override is not allowed for IBGP peers */
4178 if (flag & PEER_FLAG_AS_OVERRIDE && ptype == BGP_PEER_IBGP)
4179 return BGP_ERR_AS_OVERRIDE;
4180
4181 /* Handle flag updates where desired state matches current state. */
4182 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4183 if (set && CHECK_FLAG(peer->af_flags[afi][safi], flag)) {
4184 COND_FLAG(peer->af_flags_override[afi][safi], flag,
4185 !invert);
4186 return 0;
4187 }
4188
4189 if (!set && !CHECK_FLAG(peer->af_flags[afi][safi], flag)) {
4190 COND_FLAG(peer->af_flags_override[afi][safi], flag,
4191 invert);
4192 return 0;
4193 }
4194 }
4195
4196 /*
4197 * For EVPN we implicitly set the NEXTHOP_UNCHANGED flag,
4198 * if we are setting/unsetting flags which conflict with this flag
4199 * handle accordingly
4200 */
4201 if (afi == AFI_L2VPN && safi == SAFI_EVPN) {
4202 if (set) {
4203
4204 /*
4205 * if we are setting NEXTHOP_SELF, we need to unset the
4206 * NEXTHOP_UNCHANGED flag
4207 */
4208 if (CHECK_FLAG(flag, PEER_FLAG_NEXTHOP_SELF) ||
4209 CHECK_FLAG(flag, PEER_FLAG_FORCE_NEXTHOP_SELF))
4210 UNSET_FLAG(peer->af_flags[afi][safi],
4211 PEER_FLAG_NEXTHOP_UNCHANGED);
4212 } else {
4213
4214 /*
4215 * if we are unsetting NEXTHOP_SELF, we need to set the
4216 * NEXTHOP_UNCHANGED flag to reset the defaults for EVPN
4217 */
4218 if (CHECK_FLAG(flag, PEER_FLAG_NEXTHOP_SELF) ||
4219 CHECK_FLAG(flag, PEER_FLAG_FORCE_NEXTHOP_SELF))
4220 SET_FLAG(peer->af_flags[afi][safi],
4221 PEER_FLAG_NEXTHOP_UNCHANGED);
4222 }
4223 }
4224
4225 /*
4226 * If the peer is a route server client let's not
4227 * muck with the nexthop on the way out the door
4228 */
4229 if (flag & PEER_FLAG_RSERVER_CLIENT) {
4230 if (set)
4231 SET_FLAG(peer->af_flags[afi][safi],
4232 PEER_FLAG_NEXTHOP_UNCHANGED);
4233 else
4234 UNSET_FLAG(peer->af_flags[afi][safi],
4235 PEER_FLAG_NEXTHOP_UNCHANGED);
4236 }
4237
4238 /* Inherit from peer-group or set/unset flags accordingly. */
4239 if (peer_group_active(peer) && set == invert)
4240 peer_af_flag_inherit(peer, afi, safi, flag);
4241 else
4242 COND_FLAG(peer->af_flags[afi][safi], flag, set);
4243
4244 /* Execute action when peer is established. */
4245 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)
4246 && peer->status == Established) {
4247 if (!set && flag == PEER_FLAG_SOFT_RECONFIG)
4248 bgp_clear_adj_in(peer, afi, safi);
4249 else {
4250 if (flag == PEER_FLAG_REFLECTOR_CLIENT)
4251 peer->last_reset = PEER_DOWN_RR_CLIENT_CHANGE;
4252 else if (flag == PEER_FLAG_RSERVER_CLIENT)
4253 peer->last_reset = PEER_DOWN_RS_CLIENT_CHANGE;
4254 else if (flag == PEER_FLAG_ORF_PREFIX_SM)
4255 peer->last_reset = PEER_DOWN_CAPABILITY_CHANGE;
4256 else if (flag == PEER_FLAG_ORF_PREFIX_RM)
4257 peer->last_reset = PEER_DOWN_CAPABILITY_CHANGE;
4258
4259 peer_change_action(peer, afi, safi, action.type);
4260 }
4261 }
4262
4263 /* Check if handling a regular peer. */
4264 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4265 COND_FLAG(peer->af_flags_override[afi][safi], flag,
4266 set != invert);
4267 } else {
4268 /*
4269 * Update peer-group members, unless they are explicitely
4270 * overriding peer-group configuration.
4271 */
4272 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode,
4273 member)) {
4274 /* Skip peers with overridden configuration. */
4275 if (CHECK_FLAG(member->af_flags_override[afi][safi],
4276 flag))
4277 continue;
4278
4279 /* Check if only member without group is inverted. */
4280 member_invert =
4281 CHECK_FLAG(member->af_flags_invert[afi][safi],
4282 flag)
4283 && !invert;
4284
4285 /* Skip peers with equivalent configuration. */
4286 if (set != member_invert
4287 && CHECK_FLAG(member->af_flags[afi][safi], flag))
4288 continue;
4289
4290 if (set == member_invert
4291 && !CHECK_FLAG(member->af_flags[afi][safi], flag))
4292 continue;
4293
4294 /* Update flag on peer-group member. */
4295 COND_FLAG(member->af_flags[afi][safi], flag,
4296 set != member_invert);
4297
4298 /* Execute flag action on peer-group member. */
4299 if (member->status == Established) {
4300 if (!set && flag == PEER_FLAG_SOFT_RECONFIG)
4301 bgp_clear_adj_in(member, afi, safi);
4302 else {
4303 if (flag == PEER_FLAG_REFLECTOR_CLIENT)
4304 member->last_reset =
4305 PEER_DOWN_RR_CLIENT_CHANGE;
4306 else if (flag
4307 == PEER_FLAG_RSERVER_CLIENT)
4308 member->last_reset =
4309 PEER_DOWN_RS_CLIENT_CHANGE;
4310 else if (flag
4311 == PEER_FLAG_ORF_PREFIX_SM)
4312 member->last_reset =
4313 PEER_DOWN_CAPABILITY_CHANGE;
4314 else if (flag
4315 == PEER_FLAG_ORF_PREFIX_RM)
4316 member->last_reset =
4317 PEER_DOWN_CAPABILITY_CHANGE;
4318
4319 peer_change_action(member, afi, safi,
4320 action.type);
4321 }
4322 }
4323 }
4324 }
4325
4326 return 0;
4327 }
4328
4329 int peer_af_flag_set(struct peer *peer, afi_t afi, safi_t safi, uint32_t flag)
4330 {
4331 return peer_af_flag_modify(peer, afi, safi, flag, 1);
4332 }
4333
4334 int peer_af_flag_unset(struct peer *peer, afi_t afi, safi_t safi, uint32_t flag)
4335 {
4336 return peer_af_flag_modify(peer, afi, safi, flag, 0);
4337 }
4338
4339
4340 void peer_tx_shutdown_message_set(struct peer *peer, const char *msg)
4341 {
4342 XFREE(MTYPE_PEER_TX_SHUTDOWN_MSG, peer->tx_shutdown_message);
4343 peer->tx_shutdown_message =
4344 msg ? XSTRDUP(MTYPE_PEER_TX_SHUTDOWN_MSG, msg) : NULL;
4345 }
4346
4347 void peer_tx_shutdown_message_unset(struct peer *peer)
4348 {
4349 XFREE(MTYPE_PEER_TX_SHUTDOWN_MSG, peer->tx_shutdown_message);
4350 }
4351
4352
4353 /* EBGP multihop configuration. */
4354 int peer_ebgp_multihop_set(struct peer *peer, int ttl)
4355 {
4356 struct peer_group *group;
4357 struct listnode *node, *nnode;
4358 struct peer *peer1;
4359
4360 if (peer->sort == BGP_PEER_IBGP || peer->conf_if)
4361 return 0;
4362
4363 /* see comment in peer_ttl_security_hops_set() */
4364 if (ttl != MAXTTL) {
4365 if (CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4366 group = peer->group;
4367 if (group->conf->gtsm_hops != BGP_GTSM_HOPS_DISABLED)
4368 return BGP_ERR_NO_EBGP_MULTIHOP_WITH_TTLHACK;
4369
4370 for (ALL_LIST_ELEMENTS(group->peer, node, nnode,
4371 peer1)) {
4372 if (peer1->sort == BGP_PEER_IBGP)
4373 continue;
4374
4375 if (peer1->gtsm_hops != BGP_GTSM_HOPS_DISABLED)
4376 return BGP_ERR_NO_EBGP_MULTIHOP_WITH_TTLHACK;
4377 }
4378 } else {
4379 if (peer->gtsm_hops != BGP_GTSM_HOPS_DISABLED)
4380 return BGP_ERR_NO_EBGP_MULTIHOP_WITH_TTLHACK;
4381 }
4382 }
4383
4384 peer->ttl = ttl;
4385
4386 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4387 if (peer->fd >= 0 && peer->sort != BGP_PEER_IBGP) {
4388 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status))
4389 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
4390 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4391 else
4392 bgp_session_reset(peer);
4393 }
4394 } else {
4395 group = peer->group;
4396 for (ALL_LIST_ELEMENTS(group->peer, node, nnode, peer)) {
4397 if (peer->sort == BGP_PEER_IBGP)
4398 continue;
4399
4400 peer->ttl = group->conf->ttl;
4401
4402 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status))
4403 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
4404 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4405 else
4406 bgp_session_reset(peer);
4407 }
4408 }
4409 return 0;
4410 }
4411
4412 int peer_ebgp_multihop_unset(struct peer *peer)
4413 {
4414 struct peer_group *group;
4415 struct listnode *node, *nnode;
4416
4417 if (peer->sort == BGP_PEER_IBGP)
4418 return 0;
4419
4420 if (peer->gtsm_hops != BGP_GTSM_HOPS_DISABLED && peer->ttl != MAXTTL)
4421 return BGP_ERR_NO_EBGP_MULTIHOP_WITH_TTLHACK;
4422
4423 if (peer_group_active(peer))
4424 peer->ttl = peer->group->conf->ttl;
4425 else
4426 peer->ttl = BGP_DEFAULT_TTL;
4427
4428 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4429 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status))
4430 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
4431 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4432 else
4433 bgp_session_reset(peer);
4434 } else {
4435 group = peer->group;
4436 for (ALL_LIST_ELEMENTS(group->peer, node, nnode, peer)) {
4437 if (peer->sort == BGP_PEER_IBGP)
4438 continue;
4439
4440 peer->ttl = BGP_DEFAULT_TTL;
4441
4442 if (peer->fd >= 0) {
4443 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status))
4444 bgp_notify_send(
4445 peer, BGP_NOTIFY_CEASE,
4446 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4447 else
4448 bgp_session_reset(peer);
4449 }
4450 }
4451 }
4452 return 0;
4453 }
4454
4455 /* Neighbor description. */
4456 void peer_description_set(struct peer *peer, const char *desc)
4457 {
4458 XFREE(MTYPE_PEER_DESC, peer->desc);
4459
4460 peer->desc = XSTRDUP(MTYPE_PEER_DESC, desc);
4461 }
4462
4463 void peer_description_unset(struct peer *peer)
4464 {
4465 XFREE(MTYPE_PEER_DESC, peer->desc);
4466 }
4467
4468 /* Neighbor update-source. */
4469 int peer_update_source_if_set(struct peer *peer, const char *ifname)
4470 {
4471 struct peer *member;
4472 struct listnode *node, *nnode;
4473
4474 /* Set flag and configuration on peer. */
4475 peer_flag_set(peer, PEER_FLAG_UPDATE_SOURCE);
4476 if (peer->update_if) {
4477 if (strcmp(peer->update_if, ifname) == 0)
4478 return 0;
4479 XFREE(MTYPE_PEER_UPDATE_SOURCE, peer->update_if);
4480 }
4481 peer->update_if = XSTRDUP(MTYPE_PEER_UPDATE_SOURCE, ifname);
4482 sockunion_free(peer->update_source);
4483 peer->update_source = NULL;
4484
4485 /* Check if handling a regular peer. */
4486 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4487 /* Send notification or reset peer depending on state. */
4488 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status)) {
4489 peer->last_reset = PEER_DOWN_UPDATE_SOURCE_CHANGE;
4490 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
4491 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4492 } else
4493 bgp_session_reset(peer);
4494
4495 /* Skip peer-group mechanics for regular peers. */
4496 return 0;
4497 }
4498
4499 /*
4500 * Set flag and configuration on all peer-group members, unless they are
4501 * explicitely overriding peer-group configuration.
4502 */
4503 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
4504 /* Skip peers with overridden configuration. */
4505 if (CHECK_FLAG(member->flags_override, PEER_FLAG_UPDATE_SOURCE))
4506 continue;
4507
4508 /* Skip peers with the same configuration. */
4509 if (member->update_if) {
4510 if (strcmp(member->update_if, ifname) == 0)
4511 continue;
4512 XFREE(MTYPE_PEER_UPDATE_SOURCE, member->update_if);
4513 }
4514
4515 /* Set flag and configuration on peer-group member. */
4516 SET_FLAG(member->flags, PEER_FLAG_UPDATE_SOURCE);
4517 member->update_if = XSTRDUP(MTYPE_PEER_UPDATE_SOURCE, ifname);
4518 sockunion_free(member->update_source);
4519 member->update_source = NULL;
4520
4521 /* Send notification or reset peer depending on state. */
4522 if (BGP_IS_VALID_STATE_FOR_NOTIF(member->status)) {
4523 member->last_reset = PEER_DOWN_UPDATE_SOURCE_CHANGE;
4524 bgp_notify_send(member, BGP_NOTIFY_CEASE,
4525 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4526 } else
4527 bgp_session_reset(member);
4528 }
4529
4530 return 0;
4531 }
4532
4533 int peer_update_source_addr_set(struct peer *peer, const union sockunion *su)
4534 {
4535 struct peer *member;
4536 struct listnode *node, *nnode;
4537
4538 /* Set flag and configuration on peer. */
4539 peer_flag_set(peer, PEER_FLAG_UPDATE_SOURCE);
4540 if (peer->update_source) {
4541 if (sockunion_cmp(peer->update_source, su) == 0)
4542 return 0;
4543 sockunion_free(peer->update_source);
4544 }
4545 peer->update_source = sockunion_dup(su);
4546 XFREE(MTYPE_PEER_UPDATE_SOURCE, peer->update_if);
4547
4548 /* Check if handling a regular peer. */
4549 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4550 /* Send notification or reset peer depending on state. */
4551 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status)) {
4552 peer->last_reset = PEER_DOWN_UPDATE_SOURCE_CHANGE;
4553 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
4554 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4555 } else
4556 bgp_session_reset(peer);
4557
4558 /* Skip peer-group mechanics for regular peers. */
4559 return 0;
4560 }
4561
4562 /*
4563 * Set flag and configuration on all peer-group members, unless they are
4564 * explicitely overriding peer-group configuration.
4565 */
4566 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
4567 /* Skip peers with overridden configuration. */
4568 if (CHECK_FLAG(member->flags_override, PEER_FLAG_UPDATE_SOURCE))
4569 continue;
4570
4571 /* Skip peers with the same configuration. */
4572 if (member->update_source) {
4573 if (sockunion_cmp(member->update_source, su) == 0)
4574 continue;
4575 sockunion_free(member->update_source);
4576 }
4577
4578 /* Set flag and configuration on peer-group member. */
4579 SET_FLAG(member->flags, PEER_FLAG_UPDATE_SOURCE);
4580 member->update_source = sockunion_dup(su);
4581 XFREE(MTYPE_PEER_UPDATE_SOURCE, member->update_if);
4582
4583 /* Send notification or reset peer depending on state. */
4584 if (BGP_IS_VALID_STATE_FOR_NOTIF(member->status)) {
4585 member->last_reset = PEER_DOWN_UPDATE_SOURCE_CHANGE;
4586 bgp_notify_send(member, BGP_NOTIFY_CEASE,
4587 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4588 } else
4589 bgp_session_reset(member);
4590 }
4591
4592 return 0;
4593 }
4594
4595 int peer_update_source_unset(struct peer *peer)
4596 {
4597 struct peer *member;
4598 struct listnode *node, *nnode;
4599
4600 if (!CHECK_FLAG(peer->flags, PEER_FLAG_UPDATE_SOURCE))
4601 return 0;
4602
4603 /* Inherit configuration from peer-group if peer is member. */
4604 if (peer_group_active(peer)) {
4605 peer_flag_inherit(peer, PEER_FLAG_UPDATE_SOURCE);
4606 PEER_SU_ATTR_INHERIT(peer, peer->group, update_source);
4607 PEER_STR_ATTR_INHERIT(peer, peer->group, update_if,
4608 MTYPE_PEER_UPDATE_SOURCE);
4609 } else {
4610 /* Otherwise remove flag and configuration from peer. */
4611 peer_flag_unset(peer, PEER_FLAG_UPDATE_SOURCE);
4612 sockunion_free(peer->update_source);
4613 peer->update_source = NULL;
4614 XFREE(MTYPE_PEER_UPDATE_SOURCE, peer->update_if);
4615 }
4616
4617 /* Check if handling a regular peer. */
4618 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4619 /* Send notification or reset peer depending on state. */
4620 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status)) {
4621 peer->last_reset = PEER_DOWN_UPDATE_SOURCE_CHANGE;
4622 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
4623 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4624 } else
4625 bgp_session_reset(peer);
4626
4627 /* Skip peer-group mechanics for regular peers. */
4628 return 0;
4629 }
4630
4631 /*
4632 * Set flag and configuration on all peer-group members, unless they are
4633 * explicitely overriding peer-group configuration.
4634 */
4635 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
4636 /* Skip peers with overridden configuration. */
4637 if (CHECK_FLAG(member->flags_override, PEER_FLAG_UPDATE_SOURCE))
4638 continue;
4639
4640 /* Skip peers with the same configuration. */
4641 if (!CHECK_FLAG(member->flags, PEER_FLAG_UPDATE_SOURCE)
4642 && !member->update_source && !member->update_if)
4643 continue;
4644
4645 /* Remove flag and configuration on peer-group member. */
4646 UNSET_FLAG(member->flags, PEER_FLAG_UPDATE_SOURCE);
4647 sockunion_free(member->update_source);
4648 member->update_source = NULL;
4649 XFREE(MTYPE_PEER_UPDATE_SOURCE, member->update_if);
4650
4651 /* Send notification or reset peer depending on state. */
4652 if (BGP_IS_VALID_STATE_FOR_NOTIF(member->status)) {
4653 member->last_reset = PEER_DOWN_UPDATE_SOURCE_CHANGE;
4654 bgp_notify_send(member, BGP_NOTIFY_CEASE,
4655 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4656 } else
4657 bgp_session_reset(member);
4658 }
4659
4660 return 0;
4661 }
4662
4663 int peer_default_originate_set(struct peer *peer, afi_t afi, safi_t safi,
4664 const char *rmap, struct route_map *route_map)
4665 {
4666 struct peer *member;
4667 struct listnode *node, *nnode;
4668
4669 /* Set flag and configuration on peer. */
4670 peer_af_flag_set(peer, afi, safi, PEER_FLAG_DEFAULT_ORIGINATE);
4671 if (rmap) {
4672 if (!peer->default_rmap[afi][safi].name
4673 || strcmp(rmap, peer->default_rmap[afi][safi].name) != 0) {
4674 if (peer->default_rmap[afi][safi].name)
4675 XFREE(MTYPE_ROUTE_MAP_NAME,
4676 peer->default_rmap[afi][safi].name);
4677
4678 route_map_counter_decrement(peer->default_rmap[afi][safi].map);
4679 peer->default_rmap[afi][safi].name =
4680 XSTRDUP(MTYPE_ROUTE_MAP_NAME, rmap);
4681 peer->default_rmap[afi][safi].map = route_map;
4682 route_map_counter_increment(route_map);
4683 }
4684 } else if (!rmap) {
4685 if (peer->default_rmap[afi][safi].name)
4686 XFREE(MTYPE_ROUTE_MAP_NAME,
4687 peer->default_rmap[afi][safi].name);
4688
4689 route_map_counter_decrement(peer->default_rmap[afi][safi].map);
4690 peer->default_rmap[afi][safi].name = NULL;
4691 peer->default_rmap[afi][safi].map = NULL;
4692 }
4693
4694 /* Check if handling a regular peer. */
4695 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4696 /* Update peer route announcements. */
4697 if (peer->status == Established && peer->afc_nego[afi][safi]) {
4698 update_group_adjust_peer(peer_af_find(peer, afi, safi));
4699 bgp_default_originate(peer, afi, safi, 0);
4700 bgp_announce_route(peer, afi, safi);
4701 }
4702
4703 /* Skip peer-group mechanics for regular peers. */
4704 return 0;
4705 }
4706
4707 /*
4708 * Set flag and configuration on all peer-group members, unless they are
4709 * explicitely overriding peer-group configuration.
4710 */
4711 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
4712 /* Skip peers with overridden configuration. */
4713 if (CHECK_FLAG(member->af_flags_override[afi][safi],
4714 PEER_FLAG_DEFAULT_ORIGINATE))
4715 continue;
4716
4717 /* Set flag and configuration on peer-group member. */
4718 SET_FLAG(member->af_flags[afi][safi],
4719 PEER_FLAG_DEFAULT_ORIGINATE);
4720 if (rmap) {
4721 if (member->default_rmap[afi][safi].name)
4722 XFREE(MTYPE_ROUTE_MAP_NAME,
4723 member->default_rmap[afi][safi].name);
4724 route_map_counter_decrement(
4725 member->default_rmap[afi][safi].map);
4726 member->default_rmap[afi][safi].name =
4727 XSTRDUP(MTYPE_ROUTE_MAP_NAME, rmap);
4728 member->default_rmap[afi][safi].map = route_map;
4729 route_map_counter_increment(route_map);
4730 }
4731
4732 /* Update peer route announcements. */
4733 if (member->status == Established
4734 && member->afc_nego[afi][safi]) {
4735 update_group_adjust_peer(
4736 peer_af_find(member, afi, safi));
4737 bgp_default_originate(member, afi, safi, 0);
4738 bgp_announce_route(member, afi, safi);
4739 }
4740 }
4741
4742 return 0;
4743 }
4744
4745 int peer_default_originate_unset(struct peer *peer, afi_t afi, safi_t safi)
4746 {
4747 struct peer *member;
4748 struct listnode *node, *nnode;
4749
4750 /* Inherit configuration from peer-group if peer is member. */
4751 if (peer_group_active(peer)) {
4752 peer_af_flag_inherit(peer, afi, safi,
4753 PEER_FLAG_DEFAULT_ORIGINATE);
4754 PEER_STR_ATTR_INHERIT(peer, peer->group,
4755 default_rmap[afi][safi].name,
4756 MTYPE_ROUTE_MAP_NAME);
4757 PEER_ATTR_INHERIT(peer, peer->group,
4758 default_rmap[afi][safi].map);
4759 } else {
4760 /* Otherwise remove flag and configuration from peer. */
4761 peer_af_flag_unset(peer, afi, safi,
4762 PEER_FLAG_DEFAULT_ORIGINATE);
4763 if (peer->default_rmap[afi][safi].name)
4764 XFREE(MTYPE_ROUTE_MAP_NAME,
4765 peer->default_rmap[afi][safi].name);
4766 route_map_counter_decrement(peer->default_rmap[afi][safi].map);
4767 peer->default_rmap[afi][safi].name = NULL;
4768 peer->default_rmap[afi][safi].map = NULL;
4769 }
4770
4771 /* Check if handling a regular peer. */
4772 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4773 /* Update peer route announcements. */
4774 if (peer->status == Established && peer->afc_nego[afi][safi]) {
4775 update_group_adjust_peer(peer_af_find(peer, afi, safi));
4776 bgp_default_originate(peer, afi, safi, 1);
4777 bgp_announce_route(peer, afi, safi);
4778 }
4779
4780 /* Skip peer-group mechanics for regular peers. */
4781 return 0;
4782 }
4783
4784 /*
4785 * Remove flag and configuration from all peer-group members, unless
4786 * they are explicitely overriding peer-group configuration.
4787 */
4788 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
4789 /* Skip peers with overridden configuration. */
4790 if (CHECK_FLAG(member->af_flags_override[afi][safi],
4791 PEER_FLAG_DEFAULT_ORIGINATE))
4792 continue;
4793
4794 /* Remove flag and configuration on peer-group member. */
4795 UNSET_FLAG(peer->af_flags[afi][safi],
4796 PEER_FLAG_DEFAULT_ORIGINATE);
4797 if (peer->default_rmap[afi][safi].name)
4798 XFREE(MTYPE_ROUTE_MAP_NAME,
4799 peer->default_rmap[afi][safi].name);
4800 route_map_counter_decrement(peer->default_rmap[afi][safi].map);
4801 peer->default_rmap[afi][safi].name = NULL;
4802 peer->default_rmap[afi][safi].map = NULL;
4803
4804 /* Update peer route announcements. */
4805 if (peer->status == Established && peer->afc_nego[afi][safi]) {
4806 update_group_adjust_peer(peer_af_find(peer, afi, safi));
4807 bgp_default_originate(peer, afi, safi, 1);
4808 bgp_announce_route(peer, afi, safi);
4809 }
4810 }
4811
4812 return 0;
4813 }
4814
4815 void peer_port_set(struct peer *peer, uint16_t port)
4816 {
4817 peer->port = port;
4818 }
4819
4820 void peer_port_unset(struct peer *peer)
4821 {
4822 peer->port = BGP_PORT_DEFAULT;
4823 }
4824
4825 /*
4826 * Helper function that is called after the name of the policy
4827 * being used by a peer has changed (AF specific). Automatically
4828 * initiates inbound or outbound processing as needed.
4829 */
4830 static void peer_on_policy_change(struct peer *peer, afi_t afi, safi_t safi,
4831 int outbound)
4832 {
4833 if (outbound) {
4834 update_group_adjust_peer(peer_af_find(peer, afi, safi));
4835 if (peer->status == Established)
4836 bgp_announce_route(peer, afi, safi);
4837 } else {
4838 if (peer->status != Established)
4839 return;
4840
4841 if (CHECK_FLAG(peer->af_flags[afi][safi],
4842 PEER_FLAG_SOFT_RECONFIG))
4843 bgp_soft_reconfig_in(peer, afi, safi);
4844 else if (CHECK_FLAG(peer->cap, PEER_CAP_REFRESH_OLD_RCV)
4845 || CHECK_FLAG(peer->cap, PEER_CAP_REFRESH_NEW_RCV))
4846 bgp_route_refresh_send(peer, afi, safi, 0, 0, 0);
4847 }
4848 }
4849
4850
4851 /* neighbor weight. */
4852 int peer_weight_set(struct peer *peer, afi_t afi, safi_t safi, uint16_t weight)
4853 {
4854 struct peer *member;
4855 struct listnode *node, *nnode;
4856
4857 /* Set flag and configuration on peer. */
4858 peer_af_flag_set(peer, afi, safi, PEER_FLAG_WEIGHT);
4859 if (peer->weight[afi][safi] != weight) {
4860 peer->weight[afi][safi] = weight;
4861 peer_on_policy_change(peer, afi, safi, 0);
4862 }
4863
4864 /* Skip peer-group mechanics for regular peers. */
4865 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP))
4866 return 0;
4867
4868 /*
4869 * Set flag and configuration on all peer-group members, unless they are
4870 * explicitely overriding peer-group configuration.
4871 */
4872 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
4873 /* Skip peers with overridden configuration. */
4874 if (CHECK_FLAG(member->af_flags_override[afi][safi],
4875 PEER_FLAG_WEIGHT))
4876 continue;
4877
4878 /* Set flag and configuration on peer-group member. */
4879 SET_FLAG(member->af_flags[afi][safi], PEER_FLAG_WEIGHT);
4880 if (member->weight[afi][safi] != weight) {
4881 member->weight[afi][safi] = weight;
4882 peer_on_policy_change(member, afi, safi, 0);
4883 }
4884 }
4885
4886 return 0;
4887 }
4888
4889 int peer_weight_unset(struct peer *peer, afi_t afi, safi_t safi)
4890 {
4891 struct peer *member;
4892 struct listnode *node, *nnode;
4893
4894 if (!CHECK_FLAG(peer->af_flags[afi][safi], PEER_FLAG_WEIGHT))
4895 return 0;
4896
4897 /* Inherit configuration from peer-group if peer is member. */
4898 if (peer_group_active(peer)) {
4899 peer_af_flag_inherit(peer, afi, safi, PEER_FLAG_WEIGHT);
4900 PEER_ATTR_INHERIT(peer, peer->group, weight[afi][safi]);
4901
4902 peer_on_policy_change(peer, afi, safi, 0);
4903 return 0;
4904 }
4905
4906 /* Remove flag and configuration from peer. */
4907 peer_af_flag_unset(peer, afi, safi, PEER_FLAG_WEIGHT);
4908 peer->weight[afi][safi] = 0;
4909 peer_on_policy_change(peer, afi, safi, 0);
4910
4911 /* Skip peer-group mechanics for regular peers. */
4912 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP))
4913 return 0;
4914
4915 /*
4916 * Remove flag and configuration from all peer-group members, unless
4917 * they are explicitely overriding peer-group configuration.
4918 */
4919 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
4920 /* Skip peers with overridden configuration. */
4921 if (CHECK_FLAG(member->af_flags_override[afi][safi],
4922 PEER_FLAG_WEIGHT))
4923 continue;
4924
4925 /* Skip peers where flag is already disabled. */
4926 if (!CHECK_FLAG(member->af_flags[afi][safi], PEER_FLAG_WEIGHT))
4927 continue;
4928
4929 /* Remove flag and configuration on peer-group member. */
4930 UNSET_FLAG(member->af_flags[afi][safi], PEER_FLAG_WEIGHT);
4931 member->weight[afi][safi] = 0;
4932 peer_on_policy_change(member, afi, safi, 0);
4933 }
4934
4935 return 0;
4936 }
4937
4938 int peer_timers_set(struct peer *peer, uint32_t keepalive, uint32_t holdtime)
4939 {
4940 struct peer *member;
4941 struct listnode *node, *nnode;
4942
4943 if (keepalive > 65535)
4944 return BGP_ERR_INVALID_VALUE;
4945
4946 if (holdtime > 65535)
4947 return BGP_ERR_INVALID_VALUE;
4948
4949 if (holdtime < 3 && holdtime != 0)
4950 return BGP_ERR_INVALID_VALUE;
4951
4952 /* Set flag and configuration on peer. */
4953 peer_flag_set(peer, PEER_FLAG_TIMER);
4954 peer->holdtime = holdtime;
4955 peer->keepalive = (keepalive < holdtime / 3 ? keepalive : holdtime / 3);
4956
4957 /* Skip peer-group mechanics for regular peers. */
4958 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP))
4959 return 0;
4960
4961 /*
4962 * Set flag and configuration on all peer-group members, unless they are
4963 * explicitely overriding peer-group configuration.
4964 */
4965 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
4966 /* Skip peers with overridden configuration. */
4967 if (CHECK_FLAG(member->flags_override, PEER_FLAG_TIMER))
4968 continue;
4969
4970 /* Set flag and configuration on peer-group member. */
4971 SET_FLAG(member->flags, PEER_FLAG_TIMER);
4972 PEER_ATTR_INHERIT(peer, peer->group, holdtime);
4973 PEER_ATTR_INHERIT(peer, peer->group, keepalive);
4974 }
4975
4976 return 0;
4977 }
4978
4979 int peer_timers_unset(struct peer *peer)
4980 {
4981 struct peer *member;
4982 struct listnode *node, *nnode;
4983
4984 /* Inherit configuration from peer-group if peer is member. */
4985 if (peer_group_active(peer)) {
4986 peer_flag_inherit(peer, PEER_FLAG_TIMER);
4987 PEER_ATTR_INHERIT(peer, peer->group, holdtime);
4988 PEER_ATTR_INHERIT(peer, peer->group, keepalive);
4989 } else {
4990 /* Otherwise remove flag and configuration from peer. */
4991 peer_flag_unset(peer, PEER_FLAG_TIMER);
4992 peer->holdtime = 0;
4993 peer->keepalive = 0;
4994 }
4995
4996 /* Skip peer-group mechanics for regular peers. */
4997 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP))
4998 return 0;
4999
5000 /*
5001 * Remove flag and configuration from all peer-group members, unless
5002 * they are explicitely overriding peer-group configuration.
5003 */
5004 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5005 /* Skip peers with overridden configuration. */
5006 if (CHECK_FLAG(member->flags_override, PEER_FLAG_TIMER))
5007 continue;
5008
5009 /* Remove flag and configuration on peer-group member. */
5010 UNSET_FLAG(member->flags, PEER_FLAG_TIMER);
5011 member->holdtime = 0;
5012 member->keepalive = 0;
5013 }
5014
5015 return 0;
5016 }
5017
5018 int peer_timers_connect_set(struct peer *peer, uint32_t connect)
5019 {
5020 struct peer *member;
5021 struct listnode *node, *nnode;
5022
5023 if (connect > 65535)
5024 return BGP_ERR_INVALID_VALUE;
5025
5026 /* Set flag and configuration on peer. */
5027 peer_flag_set(peer, PEER_FLAG_TIMER_CONNECT);
5028 peer->connect = connect;
5029 peer->v_connect = connect;
5030
5031 /* Skip peer-group mechanics for regular peers. */
5032 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP))
5033 return 0;
5034
5035 /*
5036 * Set flag and configuration on all peer-group members, unless they are
5037 * explicitely overriding peer-group configuration.
5038 */
5039 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5040 /* Skip peers with overridden configuration. */
5041 if (CHECK_FLAG(member->flags_override, PEER_FLAG_TIMER_CONNECT))
5042 continue;
5043
5044 /* Set flag and configuration on peer-group member. */
5045 SET_FLAG(member->flags, PEER_FLAG_TIMER_CONNECT);
5046 member->connect = connect;
5047 member->v_connect = connect;
5048 }
5049
5050 return 0;
5051 }
5052
5053 int peer_timers_connect_unset(struct peer *peer)
5054 {
5055 struct peer *member;
5056 struct listnode *node, *nnode;
5057
5058 /* Inherit configuration from peer-group if peer is member. */
5059 if (peer_group_active(peer)) {
5060 peer_flag_inherit(peer, PEER_FLAG_TIMER_CONNECT);
5061 PEER_ATTR_INHERIT(peer, peer->group, connect);
5062 } else {
5063 /* Otherwise remove flag and configuration from peer. */
5064 peer_flag_unset(peer, PEER_FLAG_TIMER_CONNECT);
5065 peer->connect = 0;
5066 }
5067
5068 /* Set timer with fallback to default value. */
5069 if (peer->connect)
5070 peer->v_connect = peer->connect;
5071 else
5072 peer->v_connect = peer->bgp->default_connect_retry;
5073
5074 /* Skip peer-group mechanics for regular peers. */
5075 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP))
5076 return 0;
5077
5078 /*
5079 * Remove flag and configuration from all peer-group members, unless
5080 * they are explicitely overriding peer-group configuration.
5081 */
5082 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5083 /* Skip peers with overridden configuration. */
5084 if (CHECK_FLAG(member->flags_override, PEER_FLAG_TIMER_CONNECT))
5085 continue;
5086
5087 /* Remove flag and configuration on peer-group member. */
5088 UNSET_FLAG(member->flags, PEER_FLAG_TIMER_CONNECT);
5089 member->connect = 0;
5090 member->v_connect = peer->bgp->default_connect_retry;
5091 }
5092
5093 return 0;
5094 }
5095
5096 int peer_advertise_interval_set(struct peer *peer, uint32_t routeadv)
5097 {
5098 struct peer *member;
5099 struct listnode *node, *nnode;
5100
5101 if (routeadv > 600)
5102 return BGP_ERR_INVALID_VALUE;
5103
5104 /* Set flag and configuration on peer. */
5105 peer_flag_set(peer, PEER_FLAG_ROUTEADV);
5106 peer->routeadv = routeadv;
5107 peer->v_routeadv = routeadv;
5108
5109 /* Check if handling a regular peer. */
5110 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
5111 /* Update peer route announcements. */
5112 update_group_adjust_peer_afs(peer);
5113 if (peer->status == Established)
5114 bgp_announce_route_all(peer);
5115
5116 /* Skip peer-group mechanics for regular peers. */
5117 return 0;
5118 }
5119
5120 /*
5121 * Set flag and configuration on all peer-group members, unless they are
5122 * explicitely overriding peer-group configuration.
5123 */
5124 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5125 /* Skip peers with overridden configuration. */
5126 if (CHECK_FLAG(member->flags_override, PEER_FLAG_ROUTEADV))
5127 continue;
5128
5129 /* Set flag and configuration on peer-group member. */
5130 SET_FLAG(member->flags, PEER_FLAG_ROUTEADV);
5131 member->routeadv = routeadv;
5132 member->v_routeadv = routeadv;
5133
5134 /* Update peer route announcements. */
5135 update_group_adjust_peer_afs(member);
5136 if (member->status == Established)
5137 bgp_announce_route_all(member);
5138 }
5139
5140 return 0;
5141 }
5142
5143 int peer_advertise_interval_unset(struct peer *peer)
5144 {
5145 struct peer *member;
5146 struct listnode *node, *nnode;
5147
5148 /* Inherit configuration from peer-group if peer is member. */
5149 if (peer_group_active(peer)) {
5150 peer_flag_inherit(peer, PEER_FLAG_ROUTEADV);
5151 PEER_ATTR_INHERIT(peer, peer->group, routeadv);
5152 } else {
5153 /* Otherwise remove flag and configuration from peer. */
5154 peer_flag_unset(peer, PEER_FLAG_ROUTEADV);
5155 peer->routeadv = 0;
5156 }
5157
5158 /* Set timer with fallback to default value. */
5159 if (peer->routeadv)
5160 peer->v_routeadv = peer->routeadv;
5161 else
5162 peer->v_routeadv = (peer->sort == BGP_PEER_IBGP)
5163 ? BGP_DEFAULT_IBGP_ROUTEADV
5164 : BGP_DEFAULT_EBGP_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 * Remove flag and configuration from all peer-group members, unless
5179 * they are 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 /* Remove flag and configuration on peer-group member. */
5187 UNSET_FLAG(member->flags, PEER_FLAG_ROUTEADV);
5188 member->routeadv = 0;
5189 member->v_routeadv = (member->sort == BGP_PEER_IBGP)
5190 ? BGP_DEFAULT_IBGP_ROUTEADV
5191 : BGP_DEFAULT_EBGP_ROUTEADV;
5192
5193 /* Update peer route announcements. */
5194 update_group_adjust_peer_afs(member);
5195 if (member->status == Established)
5196 bgp_announce_route_all(member);
5197 }
5198
5199 return 0;
5200 }
5201
5202 /* neighbor interface */
5203 void peer_interface_set(struct peer *peer, const char *str)
5204 {
5205 XFREE(MTYPE_BGP_PEER_IFNAME, peer->ifname);
5206 peer->ifname = XSTRDUP(MTYPE_BGP_PEER_IFNAME, str);
5207 }
5208
5209 void peer_interface_unset(struct peer *peer)
5210 {
5211 XFREE(MTYPE_BGP_PEER_IFNAME, peer->ifname);
5212 }
5213
5214 /* Allow-as in. */
5215 int peer_allowas_in_set(struct peer *peer, afi_t afi, safi_t safi,
5216 int allow_num, int origin)
5217 {
5218 struct peer *member;
5219 struct listnode *node, *nnode;
5220
5221 if (!origin && (allow_num < 1 || allow_num > 10))
5222 return BGP_ERR_INVALID_VALUE;
5223
5224 /* Set flag and configuration on peer. */
5225 peer_af_flag_set(peer, afi, safi, PEER_FLAG_ALLOWAS_IN);
5226 if (origin) {
5227 if (peer->allowas_in[afi][safi] != 0
5228 || !CHECK_FLAG(peer->af_flags[afi][safi],
5229 PEER_FLAG_ALLOWAS_IN_ORIGIN)) {
5230 peer_af_flag_set(peer, afi, safi,
5231 PEER_FLAG_ALLOWAS_IN_ORIGIN);
5232 peer->allowas_in[afi][safi] = 0;
5233 peer_on_policy_change(peer, afi, safi, 0);
5234 }
5235 } else {
5236 if (peer->allowas_in[afi][safi] != allow_num
5237 || CHECK_FLAG(peer->af_flags[afi][safi],
5238 PEER_FLAG_ALLOWAS_IN_ORIGIN)) {
5239
5240 peer_af_flag_unset(peer, afi, safi,
5241 PEER_FLAG_ALLOWAS_IN_ORIGIN);
5242 peer->allowas_in[afi][safi] = allow_num;
5243 peer_on_policy_change(peer, afi, safi, 0);
5244 }
5245 }
5246
5247 /* Skip peer-group mechanics for regular peers. */
5248 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP))
5249 return 0;
5250
5251 /*
5252 * Set flag and configuration on all peer-group members, unless
5253 * they are explicitely overriding peer-group configuration.
5254 */
5255 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5256 /* Skip peers with overridden configuration. */
5257 if (CHECK_FLAG(member->af_flags_override[afi][safi],
5258 PEER_FLAG_ALLOWAS_IN))
5259 continue;
5260
5261 /* Set flag and configuration on peer-group member. */
5262 SET_FLAG(member->af_flags[afi][safi], PEER_FLAG_ALLOWAS_IN);
5263 if (origin) {
5264 if (member->allowas_in[afi][safi] != 0
5265 || !CHECK_FLAG(member->af_flags[afi][safi],
5266 PEER_FLAG_ALLOWAS_IN_ORIGIN)) {
5267 SET_FLAG(member->af_flags[afi][safi],
5268 PEER_FLAG_ALLOWAS_IN_ORIGIN);
5269 member->allowas_in[afi][safi] = 0;
5270 peer_on_policy_change(peer, afi, safi, 0);
5271 }
5272 } else {
5273 if (member->allowas_in[afi][safi] != allow_num
5274 || CHECK_FLAG(member->af_flags[afi][safi],
5275 PEER_FLAG_ALLOWAS_IN_ORIGIN)) {
5276 UNSET_FLAG(member->af_flags[afi][safi],
5277 PEER_FLAG_ALLOWAS_IN_ORIGIN);
5278 member->allowas_in[afi][safi] = allow_num;
5279 peer_on_policy_change(peer, afi, safi, 0);
5280 }
5281 }
5282 }
5283
5284 return 0;
5285 }
5286
5287 int peer_allowas_in_unset(struct peer *peer, afi_t afi, safi_t safi)
5288 {
5289 struct peer *member;
5290 struct listnode *node, *nnode;
5291
5292 /* Skip peer if flag is already disabled. */
5293 if (!CHECK_FLAG(peer->af_flags[afi][safi], PEER_FLAG_ALLOWAS_IN))
5294 return 0;
5295
5296 /* Inherit configuration from peer-group if peer is member. */
5297 if (peer_group_active(peer)) {
5298 peer_af_flag_inherit(peer, afi, safi, PEER_FLAG_ALLOWAS_IN);
5299 peer_af_flag_inherit(peer, afi, safi,
5300 PEER_FLAG_ALLOWAS_IN_ORIGIN);
5301 PEER_ATTR_INHERIT(peer, peer->group, allowas_in[afi][safi]);
5302 peer_on_policy_change(peer, afi, safi, 0);
5303
5304 return 0;
5305 }
5306
5307 /* Remove flag and configuration from peer. */
5308 peer_af_flag_unset(peer, afi, safi, PEER_FLAG_ALLOWAS_IN);
5309 peer_af_flag_unset(peer, afi, safi, PEER_FLAG_ALLOWAS_IN_ORIGIN);
5310 peer->allowas_in[afi][safi] = 0;
5311 peer_on_policy_change(peer, afi, safi, 0);
5312
5313 /* Skip peer-group mechanics if handling a regular peer. */
5314 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP))
5315 return 0;
5316
5317 /*
5318 * Remove flags and configuration from all peer-group members, unless
5319 * they are explicitely overriding peer-group configuration.
5320 */
5321 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5322 /* Skip peers with overridden configuration. */
5323 if (CHECK_FLAG(member->af_flags_override[afi][safi],
5324 PEER_FLAG_ALLOWAS_IN))
5325 continue;
5326
5327 /* Skip peers where flag is already disabled. */
5328 if (!CHECK_FLAG(member->af_flags[afi][safi],
5329 PEER_FLAG_ALLOWAS_IN))
5330 continue;
5331
5332 /* Remove flags and configuration on peer-group member. */
5333 UNSET_FLAG(member->af_flags[afi][safi], PEER_FLAG_ALLOWAS_IN);
5334 UNSET_FLAG(member->af_flags[afi][safi],
5335 PEER_FLAG_ALLOWAS_IN_ORIGIN);
5336 member->allowas_in[afi][safi] = 0;
5337 peer_on_policy_change(member, afi, safi, 0);
5338 }
5339
5340 return 0;
5341 }
5342
5343 int peer_local_as_set(struct peer *peer, as_t as, int no_prepend,
5344 int replace_as)
5345 {
5346 bool old_no_prepend, old_replace_as;
5347 struct bgp *bgp = peer->bgp;
5348 struct peer *member;
5349 struct listnode *node, *nnode;
5350 bgp_peer_sort_t ptype = peer_sort(peer);
5351
5352 if (ptype != BGP_PEER_EBGP && ptype != BGP_PEER_INTERNAL)
5353 return BGP_ERR_LOCAL_AS_ALLOWED_ONLY_FOR_EBGP;
5354
5355 if (bgp->as == as)
5356 return BGP_ERR_CANNOT_HAVE_LOCAL_AS_SAME_AS;
5357
5358 if (peer->as == as)
5359 return BGP_ERR_CANNOT_HAVE_LOCAL_AS_SAME_AS_REMOTE_AS;
5360
5361 /* Save previous flag states. */
5362 old_no_prepend =
5363 !!CHECK_FLAG(peer->flags, PEER_FLAG_LOCAL_AS_NO_PREPEND);
5364 old_replace_as =
5365 !!CHECK_FLAG(peer->flags, PEER_FLAG_LOCAL_AS_REPLACE_AS);
5366
5367 /* Set flag and configuration on peer. */
5368 peer_flag_set(peer, PEER_FLAG_LOCAL_AS);
5369 peer_flag_modify(peer, PEER_FLAG_LOCAL_AS_NO_PREPEND, no_prepend);
5370 peer_flag_modify(peer, PEER_FLAG_LOCAL_AS_REPLACE_AS, replace_as);
5371
5372 if (peer->change_local_as == as && old_no_prepend == no_prepend
5373 && old_replace_as == replace_as)
5374 return 0;
5375 peer->change_local_as = as;
5376
5377 /* Check if handling a regular peer. */
5378 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
5379 /* Send notification or reset peer depending on state. */
5380 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status)) {
5381 peer->last_reset = PEER_DOWN_LOCAL_AS_CHANGE;
5382 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
5383 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
5384 } else
5385 bgp_session_reset(peer);
5386
5387 /* Skip peer-group mechanics for regular peers. */
5388 return 0;
5389 }
5390
5391 /*
5392 * Set flag and configuration on all peer-group members, unless they are
5393 * explicitely overriding peer-group configuration.
5394 */
5395 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5396 /* Skip peers with overridden configuration. */
5397 if (CHECK_FLAG(member->flags_override, PEER_FLAG_LOCAL_AS))
5398 continue;
5399
5400 /* Skip peers with the same configuration. */
5401 old_no_prepend = CHECK_FLAG(member->flags,
5402 PEER_FLAG_LOCAL_AS_NO_PREPEND);
5403 old_replace_as = CHECK_FLAG(member->flags,
5404 PEER_FLAG_LOCAL_AS_REPLACE_AS);
5405 if (member->change_local_as == as
5406 && CHECK_FLAG(member->flags, PEER_FLAG_LOCAL_AS)
5407 && old_no_prepend == no_prepend
5408 && old_replace_as == replace_as)
5409 continue;
5410
5411 /* Set flag and configuration on peer-group member. */
5412 SET_FLAG(member->flags, PEER_FLAG_LOCAL_AS);
5413 COND_FLAG(member->flags, PEER_FLAG_LOCAL_AS_NO_PREPEND,
5414 no_prepend);
5415 COND_FLAG(member->flags, PEER_FLAG_LOCAL_AS_REPLACE_AS,
5416 replace_as);
5417 member->change_local_as = as;
5418
5419 /* Send notification or stop peer depending on state. */
5420 if (BGP_IS_VALID_STATE_FOR_NOTIF(member->status)) {
5421 member->last_reset = PEER_DOWN_LOCAL_AS_CHANGE;
5422 bgp_notify_send(member, BGP_NOTIFY_CEASE,
5423 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
5424 } else
5425 BGP_EVENT_ADD(member, BGP_Stop);
5426 }
5427
5428 return 0;
5429 }
5430
5431 int peer_local_as_unset(struct peer *peer)
5432 {
5433 struct peer *member;
5434 struct listnode *node, *nnode;
5435
5436 if (!CHECK_FLAG(peer->flags, PEER_FLAG_LOCAL_AS))
5437 return 0;
5438
5439 /* Inherit configuration from peer-group if peer is member. */
5440 if (peer_group_active(peer)) {
5441 peer_flag_inherit(peer, PEER_FLAG_LOCAL_AS);
5442 peer_flag_inherit(peer, PEER_FLAG_LOCAL_AS_NO_PREPEND);
5443 peer_flag_inherit(peer, PEER_FLAG_LOCAL_AS_REPLACE_AS);
5444 PEER_ATTR_INHERIT(peer, peer->group, change_local_as);
5445 } else {
5446 /* Otherwise remove flag and configuration from peer. */
5447 peer_flag_unset(peer, PEER_FLAG_LOCAL_AS);
5448 peer_flag_unset(peer, PEER_FLAG_LOCAL_AS_NO_PREPEND);
5449 peer_flag_unset(peer, PEER_FLAG_LOCAL_AS_REPLACE_AS);
5450 peer->change_local_as = 0;
5451 }
5452
5453 /* Check if handling a regular peer. */
5454 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
5455 /* Send notification or stop peer depending on state. */
5456 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status)) {
5457 peer->last_reset = PEER_DOWN_LOCAL_AS_CHANGE;
5458 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
5459 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
5460 } else
5461 BGP_EVENT_ADD(peer, BGP_Stop);
5462
5463 /* Skip peer-group mechanics for regular peers. */
5464 return 0;
5465 }
5466
5467 /*
5468 * Remove flag and configuration from all peer-group members, unless
5469 * they are explicitely overriding peer-group configuration.
5470 */
5471 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5472 /* Skip peers with overridden configuration. */
5473 if (CHECK_FLAG(member->flags_override, PEER_FLAG_LOCAL_AS))
5474 continue;
5475
5476 /* Remove flag and configuration on peer-group member. */
5477 UNSET_FLAG(member->flags, PEER_FLAG_LOCAL_AS);
5478 UNSET_FLAG(member->flags, PEER_FLAG_LOCAL_AS_NO_PREPEND);
5479 UNSET_FLAG(member->flags, PEER_FLAG_LOCAL_AS_REPLACE_AS);
5480 member->change_local_as = 0;
5481
5482 /* Send notification or stop peer depending on state. */
5483 if (BGP_IS_VALID_STATE_FOR_NOTIF(member->status)) {
5484 member->last_reset = PEER_DOWN_LOCAL_AS_CHANGE;
5485 bgp_notify_send(member, BGP_NOTIFY_CEASE,
5486 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
5487 } else
5488 bgp_session_reset(member);
5489 }
5490
5491 return 0;
5492 }
5493
5494 /* Set password for authenticating with the peer. */
5495 int peer_password_set(struct peer *peer, const char *password)
5496 {
5497 struct peer *member;
5498 struct listnode *node, *nnode;
5499 int len = password ? strlen(password) : 0;
5500 int ret = BGP_SUCCESS;
5501
5502 if ((len < PEER_PASSWORD_MINLEN) || (len > PEER_PASSWORD_MAXLEN))
5503 return BGP_ERR_INVALID_VALUE;
5504
5505 /* Set flag and configuration on peer. */
5506 peer_flag_set(peer, PEER_FLAG_PASSWORD);
5507 if (peer->password && strcmp(peer->password, password) == 0)
5508 return 0;
5509 XFREE(MTYPE_PEER_PASSWORD, peer->password);
5510 peer->password = XSTRDUP(MTYPE_PEER_PASSWORD, password);
5511
5512 /* Check if handling a regular peer. */
5513 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
5514 /* Send notification or reset peer depending on state. */
5515 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status))
5516 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
5517 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
5518 else
5519 bgp_session_reset(peer);
5520
5521 /*
5522 * Attempt to install password on socket and skip peer-group
5523 * mechanics.
5524 */
5525 if (BGP_PEER_SU_UNSPEC(peer))
5526 return BGP_SUCCESS;
5527 return (bgp_md5_set(peer) >= 0) ? BGP_SUCCESS
5528 : BGP_ERR_TCPSIG_FAILED;
5529 }
5530
5531 /*
5532 * Set flag and configuration on all peer-group members, unless they are
5533 * explicitely overriding peer-group configuration.
5534 */
5535 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5536 /* Skip peers with overridden configuration. */
5537 if (CHECK_FLAG(member->flags_override, PEER_FLAG_PASSWORD))
5538 continue;
5539
5540 /* Skip peers with the same password. */
5541 if (member->password && strcmp(member->password, password) == 0)
5542 continue;
5543
5544 /* Set flag and configuration on peer-group member. */
5545 SET_FLAG(member->flags, PEER_FLAG_PASSWORD);
5546 if (member->password)
5547 XFREE(MTYPE_PEER_PASSWORD, member->password);
5548 member->password = XSTRDUP(MTYPE_PEER_PASSWORD, password);
5549
5550 /* Send notification or reset peer depending on state. */
5551 if (BGP_IS_VALID_STATE_FOR_NOTIF(member->status))
5552 bgp_notify_send(member, BGP_NOTIFY_CEASE,
5553 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
5554 else
5555 bgp_session_reset(member);
5556
5557 /* Attempt to install password on socket. */
5558 if (!BGP_PEER_SU_UNSPEC(member) && bgp_md5_set(member) < 0)
5559 ret = BGP_ERR_TCPSIG_FAILED;
5560 }
5561
5562 /* Set flag and configuration on all peer-group listen ranges */
5563 struct listnode *ln;
5564 struct prefix *lr;
5565
5566 for (ALL_LIST_ELEMENTS_RO(peer->group->listen_range[AFI_IP], ln, lr))
5567 bgp_md5_set_prefix(lr, password);
5568 for (ALL_LIST_ELEMENTS_RO(peer->group->listen_range[AFI_IP6], ln, lr))
5569 bgp_md5_set_prefix(lr, password);
5570
5571 return ret;
5572 }
5573
5574 int peer_password_unset(struct peer *peer)
5575 {
5576 struct peer *member;
5577 struct listnode *node, *nnode;
5578
5579 if (!CHECK_FLAG(peer->flags, PEER_FLAG_PASSWORD))
5580 return 0;
5581
5582 /* Inherit configuration from peer-group if peer is member. */
5583 if (peer_group_active(peer)) {
5584 peer_flag_inherit(peer, PEER_FLAG_PASSWORD);
5585 PEER_STR_ATTR_INHERIT(peer, peer->group, password,
5586 MTYPE_PEER_PASSWORD);
5587 } else {
5588 /* Otherwise remove flag and configuration from peer. */
5589 peer_flag_unset(peer, PEER_FLAG_PASSWORD);
5590 XFREE(MTYPE_PEER_PASSWORD, peer->password);
5591 }
5592
5593 /* Check if handling a regular peer. */
5594 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
5595 /* Send notification or reset peer depending on state. */
5596 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status))
5597 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
5598 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
5599 else
5600 bgp_session_reset(peer);
5601
5602 /* Attempt to uninstall password on socket. */
5603 if (!BGP_PEER_SU_UNSPEC(peer))
5604 bgp_md5_unset(peer);
5605
5606 /* Skip peer-group mechanics for regular peers. */
5607 return 0;
5608 }
5609
5610 /*
5611 * Remove flag and configuration from all peer-group members, unless
5612 * they are explicitely overriding peer-group configuration.
5613 */
5614 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5615 /* Skip peers with overridden configuration. */
5616 if (CHECK_FLAG(member->flags_override, PEER_FLAG_PASSWORD))
5617 continue;
5618
5619 /* Remove flag and configuration on peer-group member. */
5620 UNSET_FLAG(member->flags, PEER_FLAG_PASSWORD);
5621 XFREE(MTYPE_PEER_PASSWORD, member->password);
5622
5623 /* Send notification or reset peer depending on state. */
5624 if (BGP_IS_VALID_STATE_FOR_NOTIF(member->status))
5625 bgp_notify_send(member, BGP_NOTIFY_CEASE,
5626 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
5627 else
5628 bgp_session_reset(member);
5629
5630 /* Attempt to uninstall password on socket. */
5631 if (!BGP_PEER_SU_UNSPEC(member))
5632 bgp_md5_unset(member);
5633 }
5634
5635 /* Set flag and configuration on all peer-group listen ranges */
5636 struct listnode *ln;
5637 struct prefix *lr;
5638
5639 for (ALL_LIST_ELEMENTS_RO(peer->group->listen_range[AFI_IP], ln, lr))
5640 bgp_md5_unset_prefix(lr);
5641 for (ALL_LIST_ELEMENTS_RO(peer->group->listen_range[AFI_IP6], ln, lr))
5642 bgp_md5_unset_prefix(lr);
5643
5644 return 0;
5645 }
5646
5647
5648 /* Set distribute list to the peer. */
5649 int peer_distribute_set(struct peer *peer, afi_t afi, safi_t safi, int direct,
5650 const char *name)
5651 {
5652 struct peer *member;
5653 struct bgp_filter *filter;
5654 struct listnode *node, *nnode;
5655
5656 if (direct != FILTER_IN && direct != FILTER_OUT)
5657 return BGP_ERR_INVALID_VALUE;
5658
5659 /* Set configuration on peer. */
5660 filter = &peer->filter[afi][safi];
5661 if (filter->plist[direct].name)
5662 return BGP_ERR_PEER_FILTER_CONFLICT;
5663 if (filter->dlist[direct].name)
5664 XFREE(MTYPE_BGP_FILTER_NAME, filter->dlist[direct].name);
5665 filter->dlist[direct].name = XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
5666 filter->dlist[direct].alist = access_list_lookup(afi, name);
5667
5668 /* Check if handling a regular peer. */
5669 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
5670 /* Set override-flag and process peer route updates. */
5671 SET_FLAG(peer->filter_override[afi][safi][direct],
5672 PEER_FT_DISTRIBUTE_LIST);
5673 peer_on_policy_change(peer, afi, safi,
5674 (direct == FILTER_OUT) ? 1 : 0);
5675
5676 /* Skip peer-group mechanics for regular peers. */
5677 return 0;
5678 }
5679
5680 /*
5681 * Set configuration on all peer-group members, un less they are
5682 * explicitely overriding peer-group configuration.
5683 */
5684 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5685 /* Skip peers with overridden configuration. */
5686 if (CHECK_FLAG(member->filter_override[afi][safi][direct],
5687 PEER_FT_DISTRIBUTE_LIST))
5688 continue;
5689
5690 /* Set configuration on peer-group member. */
5691 filter = &member->filter[afi][safi];
5692 if (filter->dlist[direct].name)
5693 XFREE(MTYPE_BGP_FILTER_NAME,
5694 filter->dlist[direct].name);
5695 filter->dlist[direct].name =
5696 XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
5697 filter->dlist[direct].alist = access_list_lookup(afi, name);
5698
5699 /* Process peer route updates. */
5700 peer_on_policy_change(member, afi, safi,
5701 (direct == FILTER_OUT) ? 1 : 0);
5702 }
5703
5704 return 0;
5705 }
5706
5707 int peer_distribute_unset(struct peer *peer, afi_t afi, safi_t safi, int direct)
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 /* Unset override-flag unconditionally. */
5717 UNSET_FLAG(peer->filter_override[afi][safi][direct],
5718 PEER_FT_DISTRIBUTE_LIST);
5719
5720 /* Inherit configuration from peer-group if peer is member. */
5721 if (peer_group_active(peer)) {
5722 PEER_STR_ATTR_INHERIT(peer, peer->group,
5723 filter[afi][safi].dlist[direct].name,
5724 MTYPE_BGP_FILTER_NAME);
5725 PEER_ATTR_INHERIT(peer, peer->group,
5726 filter[afi][safi].dlist[direct].alist);
5727 } else {
5728 /* Otherwise remove configuration from peer. */
5729 filter = &peer->filter[afi][safi];
5730 if (filter->dlist[direct].name)
5731 XFREE(MTYPE_BGP_FILTER_NAME,
5732 filter->dlist[direct].name);
5733 filter->dlist[direct].name = NULL;
5734 filter->dlist[direct].alist = NULL;
5735 }
5736
5737 /* Check if handling a regular peer. */
5738 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
5739 /* Process peer route updates. */
5740 peer_on_policy_change(peer, afi, safi,
5741 (direct == FILTER_OUT) ? 1 : 0);
5742
5743 /* Skip peer-group mechanics for regular peers. */
5744 return 0;
5745 }
5746
5747 /*
5748 * Remove configuration on all peer-group members, unless they are
5749 * explicitely overriding peer-group configuration.
5750 */
5751 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5752 /* Skip peers with overridden configuration. */
5753 if (CHECK_FLAG(member->filter_override[afi][safi][direct],
5754 PEER_FT_DISTRIBUTE_LIST))
5755 continue;
5756
5757 /* Remove configuration on peer-group member. */
5758 filter = &member->filter[afi][safi];
5759 if (filter->dlist[direct].name)
5760 XFREE(MTYPE_BGP_FILTER_NAME,
5761 filter->dlist[direct].name);
5762 filter->dlist[direct].name = NULL;
5763 filter->dlist[direct].alist = NULL;
5764
5765 /* Process peer route updates. */
5766 peer_on_policy_change(member, afi, safi,
5767 (direct == FILTER_OUT) ? 1 : 0);
5768 }
5769
5770 return 0;
5771 }
5772
5773 /* Update distribute list. */
5774 static void peer_distribute_update(struct access_list *access)
5775 {
5776 afi_t afi;
5777 safi_t safi;
5778 int direct;
5779 struct listnode *mnode, *mnnode;
5780 struct listnode *node, *nnode;
5781 struct bgp *bgp;
5782 struct peer *peer;
5783 struct peer_group *group;
5784 struct bgp_filter *filter;
5785
5786 for (ALL_LIST_ELEMENTS(bm->bgp, mnode, mnnode, bgp)) {
5787 if (access->name)
5788 update_group_policy_update(bgp, BGP_POLICY_FILTER_LIST,
5789 access->name, 0, 0);
5790 for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) {
5791 FOREACH_AFI_SAFI (afi, safi) {
5792 filter = &peer->filter[afi][safi];
5793
5794 for (direct = FILTER_IN; direct < FILTER_MAX;
5795 direct++) {
5796 if (filter->dlist[direct].name)
5797 filter->dlist[direct]
5798 .alist = access_list_lookup(
5799 afi,
5800 filter->dlist[direct]
5801 .name);
5802 else
5803 filter->dlist[direct].alist =
5804 NULL;
5805 }
5806 }
5807 }
5808 for (ALL_LIST_ELEMENTS(bgp->group, node, nnode, group)) {
5809 FOREACH_AFI_SAFI (afi, safi) {
5810 filter = &group->conf->filter[afi][safi];
5811
5812 for (direct = FILTER_IN; direct < FILTER_MAX;
5813 direct++) {
5814 if (filter->dlist[direct].name)
5815 filter->dlist[direct]
5816 .alist = access_list_lookup(
5817 afi,
5818 filter->dlist[direct]
5819 .name);
5820 else
5821 filter->dlist[direct].alist =
5822 NULL;
5823 }
5824 }
5825 }
5826 #ifdef ENABLE_BGP_VNC
5827 vnc_prefix_list_update(bgp);
5828 #endif
5829 }
5830 }
5831
5832 /* Set prefix list to the peer. */
5833 int peer_prefix_list_set(struct peer *peer, afi_t afi, safi_t safi, int direct,
5834 const char *name)
5835 {
5836 struct peer *member;
5837 struct bgp_filter *filter;
5838 struct listnode *node, *nnode;
5839
5840 if (direct != FILTER_IN && direct != FILTER_OUT)
5841 return BGP_ERR_INVALID_VALUE;
5842
5843 /* Set configuration on peer. */
5844 filter = &peer->filter[afi][safi];
5845 if (filter->dlist[direct].name)
5846 return BGP_ERR_PEER_FILTER_CONFLICT;
5847 if (filter->plist[direct].name)
5848 XFREE(MTYPE_BGP_FILTER_NAME, filter->plist[direct].name);
5849 filter->plist[direct].name = XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
5850 filter->plist[direct].plist = prefix_list_lookup(afi, name);
5851
5852 /* Check if handling a regular peer. */
5853 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
5854 /* Set override-flag and process peer route updates. */
5855 SET_FLAG(peer->filter_override[afi][safi][direct],
5856 PEER_FT_PREFIX_LIST);
5857 peer_on_policy_change(peer, afi, safi,
5858 (direct == FILTER_OUT) ? 1 : 0);
5859
5860 /* Skip peer-group mechanics for regular peers. */
5861 return 0;
5862 }
5863
5864 /*
5865 * Set configuration on all peer-group members, unless they are
5866 * explicitely overriding peer-group configuration.
5867 */
5868 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5869 /* Skip peers with overridden configuration. */
5870 if (CHECK_FLAG(member->filter_override[afi][safi][direct],
5871 PEER_FT_PREFIX_LIST))
5872 continue;
5873
5874 /* Set configuration on peer-group member. */
5875 filter = &member->filter[afi][safi];
5876 if (filter->plist[direct].name)
5877 XFREE(MTYPE_BGP_FILTER_NAME,
5878 filter->plist[direct].name);
5879 filter->plist[direct].name =
5880 XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
5881 filter->plist[direct].plist = prefix_list_lookup(afi, name);
5882
5883 /* Process peer route updates. */
5884 peer_on_policy_change(member, afi, safi,
5885 (direct == FILTER_OUT) ? 1 : 0);
5886 }
5887
5888 return 0;
5889 }
5890
5891 int peer_prefix_list_unset(struct peer *peer, afi_t afi, safi_t safi,
5892 int direct)
5893 {
5894 struct peer *member;
5895 struct bgp_filter *filter;
5896 struct listnode *node, *nnode;
5897
5898 if (direct != FILTER_IN && direct != FILTER_OUT)
5899 return BGP_ERR_INVALID_VALUE;
5900
5901 /* Unset override-flag unconditionally. */
5902 UNSET_FLAG(peer->filter_override[afi][safi][direct],
5903 PEER_FT_PREFIX_LIST);
5904
5905 /* Inherit configuration from peer-group if peer is member. */
5906 if (peer_group_active(peer)) {
5907 PEER_STR_ATTR_INHERIT(peer, peer->group,
5908 filter[afi][safi].plist[direct].name,
5909 MTYPE_BGP_FILTER_NAME);
5910 PEER_ATTR_INHERIT(peer, peer->group,
5911 filter[afi][safi].plist[direct].plist);
5912 } else {
5913 /* Otherwise remove configuration from peer. */
5914 filter = &peer->filter[afi][safi];
5915 if (filter->plist[direct].name)
5916 XFREE(MTYPE_BGP_FILTER_NAME,
5917 filter->plist[direct].name);
5918 filter->plist[direct].name = NULL;
5919 filter->plist[direct].plist = NULL;
5920 }
5921
5922 /* Check if handling a regular peer. */
5923 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
5924 /* Process peer route updates. */
5925 peer_on_policy_change(peer, afi, safi,
5926 (direct == FILTER_OUT) ? 1 : 0);
5927
5928 /* Skip peer-group mechanics for regular peers. */
5929 return 0;
5930 }
5931
5932 /*
5933 * Remove configuration on all peer-group members, unless they are
5934 * explicitely overriding peer-group configuration.
5935 */
5936 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5937 /* Skip peers with overridden configuration. */
5938 if (CHECK_FLAG(member->filter_override[afi][safi][direct],
5939 PEER_FT_PREFIX_LIST))
5940 continue;
5941
5942 /* Remove configuration on peer-group member. */
5943 filter = &member->filter[afi][safi];
5944 if (filter->plist[direct].name)
5945 XFREE(MTYPE_BGP_FILTER_NAME,
5946 filter->plist[direct].name);
5947 filter->plist[direct].name = NULL;
5948 filter->plist[direct].plist = NULL;
5949
5950 /* Process peer route updates. */
5951 peer_on_policy_change(member, afi, safi,
5952 (direct == FILTER_OUT) ? 1 : 0);
5953 }
5954
5955 return 0;
5956 }
5957
5958 /* Update prefix-list list. */
5959 static void peer_prefix_list_update(struct prefix_list *plist)
5960 {
5961 struct listnode *mnode, *mnnode;
5962 struct listnode *node, *nnode;
5963 struct bgp *bgp;
5964 struct peer *peer;
5965 struct peer_group *group;
5966 struct bgp_filter *filter;
5967 afi_t afi;
5968 safi_t safi;
5969 int direct;
5970
5971 for (ALL_LIST_ELEMENTS(bm->bgp, mnode, mnnode, bgp)) {
5972
5973 /*
5974 * Update the prefix-list on update groups.
5975 */
5976 update_group_policy_update(
5977 bgp, BGP_POLICY_PREFIX_LIST,
5978 plist ? prefix_list_name(plist) : NULL, 0, 0);
5979
5980 for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) {
5981 FOREACH_AFI_SAFI (afi, safi) {
5982 filter = &peer->filter[afi][safi];
5983
5984 for (direct = FILTER_IN; direct < FILTER_MAX;
5985 direct++) {
5986 if (filter->plist[direct].name)
5987 filter->plist[direct]
5988 .plist = prefix_list_lookup(
5989 afi,
5990 filter->plist[direct]
5991 .name);
5992 else
5993 filter->plist[direct].plist =
5994 NULL;
5995 }
5996 }
5997 }
5998 for (ALL_LIST_ELEMENTS(bgp->group, node, nnode, group)) {
5999 FOREACH_AFI_SAFI (afi, safi) {
6000 filter = &group->conf->filter[afi][safi];
6001
6002 for (direct = FILTER_IN; direct < FILTER_MAX;
6003 direct++) {
6004 if (filter->plist[direct].name)
6005 filter->plist[direct]
6006 .plist = prefix_list_lookup(
6007 afi,
6008 filter->plist[direct]
6009 .name);
6010 else
6011 filter->plist[direct].plist =
6012 NULL;
6013 }
6014 }
6015 }
6016 }
6017 }
6018
6019 int peer_aslist_set(struct peer *peer, afi_t afi, safi_t safi, int direct,
6020 const char *name)
6021 {
6022 struct peer *member;
6023 struct bgp_filter *filter;
6024 struct listnode *node, *nnode;
6025
6026 if (direct != FILTER_IN && direct != FILTER_OUT)
6027 return BGP_ERR_INVALID_VALUE;
6028
6029 /* Set configuration on peer. */
6030 filter = &peer->filter[afi][safi];
6031 if (filter->aslist[direct].name)
6032 XFREE(MTYPE_BGP_FILTER_NAME, filter->aslist[direct].name);
6033 filter->aslist[direct].name = XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
6034 filter->aslist[direct].aslist = as_list_lookup(name);
6035
6036 /* Check if handling a regular peer. */
6037 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6038 /* Set override-flag and process peer route updates. */
6039 SET_FLAG(peer->filter_override[afi][safi][direct],
6040 PEER_FT_FILTER_LIST);
6041 peer_on_policy_change(peer, afi, safi,
6042 (direct == FILTER_OUT) ? 1 : 0);
6043
6044 /* Skip peer-group mechanics for regular peers. */
6045 return 0;
6046 }
6047
6048 /*
6049 * Set configuration on all peer-group members, unless they are
6050 * explicitely overriding peer-group configuration.
6051 */
6052 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
6053 /* Skip peers with overridden configuration. */
6054 if (CHECK_FLAG(member->filter_override[afi][safi][direct],
6055 PEER_FT_FILTER_LIST))
6056 continue;
6057
6058 /* Set configuration on peer-group member. */
6059 filter = &member->filter[afi][safi];
6060 if (filter->aslist[direct].name)
6061 XFREE(MTYPE_BGP_FILTER_NAME,
6062 filter->aslist[direct].name);
6063 filter->aslist[direct].name =
6064 XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
6065 filter->aslist[direct].aslist = as_list_lookup(name);
6066
6067 /* Process peer route updates. */
6068 peer_on_policy_change(member, afi, safi,
6069 (direct == FILTER_OUT) ? 1 : 0);
6070 }
6071
6072 return 0;
6073 }
6074
6075 int peer_aslist_unset(struct peer *peer, afi_t afi, safi_t safi, int direct)
6076 {
6077 struct peer *member;
6078 struct bgp_filter *filter;
6079 struct listnode *node, *nnode;
6080
6081 if (direct != FILTER_IN && direct != FILTER_OUT)
6082 return BGP_ERR_INVALID_VALUE;
6083
6084 /* Unset override-flag unconditionally. */
6085 UNSET_FLAG(peer->filter_override[afi][safi][direct],
6086 PEER_FT_FILTER_LIST);
6087
6088 /* Inherit configuration from peer-group if peer is member. */
6089 if (peer_group_active(peer)) {
6090 PEER_STR_ATTR_INHERIT(peer, peer->group,
6091 filter[afi][safi].aslist[direct].name,
6092 MTYPE_BGP_FILTER_NAME);
6093 PEER_ATTR_INHERIT(peer, peer->group,
6094 filter[afi][safi].aslist[direct].aslist);
6095 } else {
6096 /* Otherwise remove configuration from peer. */
6097 filter = &peer->filter[afi][safi];
6098 if (filter->aslist[direct].name)
6099 XFREE(MTYPE_BGP_FILTER_NAME,
6100 filter->aslist[direct].name);
6101 filter->aslist[direct].name = NULL;
6102 filter->aslist[direct].aslist = NULL;
6103 }
6104
6105 /* Check if handling a regular peer. */
6106 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6107 /* Process peer route updates. */
6108 peer_on_policy_change(peer, afi, safi,
6109 (direct == FILTER_OUT) ? 1 : 0);
6110
6111 /* Skip peer-group mechanics for regular peers. */
6112 return 0;
6113 }
6114
6115 /*
6116 * Remove configuration on all peer-group members, unless they are
6117 * explicitely overriding peer-group configuration.
6118 */
6119 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
6120 /* Skip peers with overridden configuration. */
6121 if (CHECK_FLAG(member->filter_override[afi][safi][direct],
6122 PEER_FT_FILTER_LIST))
6123 continue;
6124
6125 /* Remove configuration on peer-group member. */
6126 filter = &member->filter[afi][safi];
6127 if (filter->aslist[direct].name)
6128 XFREE(MTYPE_BGP_FILTER_NAME,
6129 filter->aslist[direct].name);
6130 filter->aslist[direct].name = NULL;
6131 filter->aslist[direct].aslist = NULL;
6132
6133 /* Process peer route updates. */
6134 peer_on_policy_change(member, afi, safi,
6135 (direct == FILTER_OUT) ? 1 : 0);
6136 }
6137
6138 return 0;
6139 }
6140
6141 static void peer_aslist_update(const char *aslist_name)
6142 {
6143 afi_t afi;
6144 safi_t safi;
6145 int direct;
6146 struct listnode *mnode, *mnnode;
6147 struct listnode *node, *nnode;
6148 struct bgp *bgp;
6149 struct peer *peer;
6150 struct peer_group *group;
6151 struct bgp_filter *filter;
6152
6153 for (ALL_LIST_ELEMENTS(bm->bgp, mnode, mnnode, bgp)) {
6154 update_group_policy_update(bgp, BGP_POLICY_FILTER_LIST,
6155 aslist_name, 0, 0);
6156
6157 for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) {
6158 FOREACH_AFI_SAFI (afi, safi) {
6159 filter = &peer->filter[afi][safi];
6160
6161 for (direct = FILTER_IN; direct < FILTER_MAX;
6162 direct++) {
6163 if (filter->aslist[direct].name)
6164 filter->aslist[direct]
6165 .aslist = as_list_lookup(
6166 filter->aslist[direct]
6167 .name);
6168 else
6169 filter->aslist[direct].aslist =
6170 NULL;
6171 }
6172 }
6173 }
6174 for (ALL_LIST_ELEMENTS(bgp->group, node, nnode, group)) {
6175 FOREACH_AFI_SAFI (afi, safi) {
6176 filter = &group->conf->filter[afi][safi];
6177
6178 for (direct = FILTER_IN; direct < FILTER_MAX;
6179 direct++) {
6180 if (filter->aslist[direct].name)
6181 filter->aslist[direct]
6182 .aslist = as_list_lookup(
6183 filter->aslist[direct]
6184 .name);
6185 else
6186 filter->aslist[direct].aslist =
6187 NULL;
6188 }
6189 }
6190 }
6191 }
6192 }
6193
6194 static void peer_aslist_add(char *aslist_name)
6195 {
6196 peer_aslist_update(aslist_name);
6197 route_map_notify_dependencies(aslist_name, RMAP_EVENT_ASLIST_ADDED);
6198 }
6199
6200 static void peer_aslist_del(const char *aslist_name)
6201 {
6202 peer_aslist_update(aslist_name);
6203 route_map_notify_dependencies(aslist_name, RMAP_EVENT_ASLIST_DELETED);
6204 }
6205
6206
6207 int peer_route_map_set(struct peer *peer, afi_t afi, safi_t safi, int direct,
6208 const char *name, struct route_map *route_map)
6209 {
6210 struct peer *member;
6211 struct bgp_filter *filter;
6212 struct listnode *node, *nnode;
6213
6214 if (direct != RMAP_IN && direct != RMAP_OUT)
6215 return BGP_ERR_INVALID_VALUE;
6216
6217 /* Set configuration on peer. */
6218 filter = &peer->filter[afi][safi];
6219 if (filter->map[direct].name) {
6220 /* If the neighbor is configured with the same route-map
6221 * again then, ignore the duplicate configuration.
6222 */
6223 if (strcmp(filter->map[direct].name, name) == 0)
6224 return 0;
6225
6226 XFREE(MTYPE_BGP_FILTER_NAME, filter->map[direct].name);
6227 }
6228 route_map_counter_decrement(filter->map[direct].map);
6229 filter->map[direct].name = XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
6230 filter->map[direct].map = route_map;
6231 route_map_counter_increment(route_map);
6232
6233 /* Check if handling a regular peer. */
6234 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6235 /* Set override-flag and process peer route updates. */
6236 SET_FLAG(peer->filter_override[afi][safi][direct],
6237 PEER_FT_ROUTE_MAP);
6238 peer_on_policy_change(peer, afi, safi,
6239 (direct == RMAP_OUT) ? 1 : 0);
6240
6241 /* Skip peer-group mechanics for regular peers. */
6242 return 0;
6243 }
6244
6245 /*
6246 * Set configuration on all peer-group members, unless they are
6247 * explicitely overriding peer-group configuration.
6248 */
6249 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
6250 /* Skip peers with overridden configuration. */
6251 if (CHECK_FLAG(member->filter_override[afi][safi][direct],
6252 PEER_FT_ROUTE_MAP))
6253 continue;
6254
6255 /* Set configuration on peer-group member. */
6256 filter = &member->filter[afi][safi];
6257 if (filter->map[direct].name)
6258 XFREE(MTYPE_BGP_FILTER_NAME, filter->map[direct].name);
6259 route_map_counter_decrement(filter->map[direct].map);
6260 filter->map[direct].name = XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
6261 filter->map[direct].map = route_map;
6262 route_map_counter_increment(route_map);
6263
6264 /* Process peer route updates. */
6265 peer_on_policy_change(member, afi, safi,
6266 (direct == RMAP_OUT) ? 1 : 0);
6267 }
6268 return 0;
6269 }
6270
6271 /* Unset route-map from the peer. */
6272 int peer_route_map_unset(struct peer *peer, afi_t afi, safi_t safi, int direct)
6273 {
6274 struct peer *member;
6275 struct bgp_filter *filter;
6276 struct listnode *node, *nnode;
6277
6278 if (direct != RMAP_IN && direct != RMAP_OUT)
6279 return BGP_ERR_INVALID_VALUE;
6280
6281 /* Unset override-flag unconditionally. */
6282 UNSET_FLAG(peer->filter_override[afi][safi][direct], PEER_FT_ROUTE_MAP);
6283
6284 /* Inherit configuration from peer-group if peer is member. */
6285 if (peer_group_active(peer)) {
6286 PEER_STR_ATTR_INHERIT(peer, peer->group,
6287 filter[afi][safi].map[direct].name,
6288 MTYPE_BGP_FILTER_NAME);
6289 PEER_ATTR_INHERIT(peer, peer->group,
6290 filter[afi][safi].map[direct].map);
6291 } else {
6292 /* Otherwise remove configuration from peer. */
6293 filter = &peer->filter[afi][safi];
6294 if (filter->map[direct].name)
6295 XFREE(MTYPE_BGP_FILTER_NAME, filter->map[direct].name);
6296 route_map_counter_decrement(filter->map[direct].map);
6297 filter->map[direct].name = NULL;
6298 filter->map[direct].map = NULL;
6299 }
6300
6301 /* Check if handling a regular peer. */
6302 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6303 /* Process peer route updates. */
6304 peer_on_policy_change(peer, afi, safi,
6305 (direct == RMAP_OUT) ? 1 : 0);
6306
6307 /* Skip peer-group mechanics for regular peers. */
6308 return 0;
6309 }
6310
6311 /*
6312 * Remove configuration on all peer-group members, unless they are
6313 * explicitely overriding peer-group configuration.
6314 */
6315 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
6316 /* Skip peers with overridden configuration. */
6317 if (CHECK_FLAG(member->filter_override[afi][safi][direct],
6318 PEER_FT_ROUTE_MAP))
6319 continue;
6320
6321 /* Remove configuration on peer-group member. */
6322 filter = &member->filter[afi][safi];
6323 if (filter->map[direct].name)
6324 XFREE(MTYPE_BGP_FILTER_NAME, filter->map[direct].name);
6325 route_map_counter_decrement(filter->map[direct].map);
6326 filter->map[direct].name = NULL;
6327 filter->map[direct].map = NULL;
6328
6329 /* Process peer route updates. */
6330 peer_on_policy_change(member, afi, safi,
6331 (direct == RMAP_OUT) ? 1 : 0);
6332 }
6333
6334 return 0;
6335 }
6336
6337 /* Set unsuppress-map to the peer. */
6338 int peer_unsuppress_map_set(struct peer *peer, afi_t afi, safi_t safi,
6339 const char *name, struct route_map *route_map)
6340 {
6341 struct peer *member;
6342 struct bgp_filter *filter;
6343 struct listnode *node, *nnode;
6344
6345 /* Set configuration on peer. */
6346 filter = &peer->filter[afi][safi];
6347 if (filter->usmap.name)
6348 XFREE(MTYPE_BGP_FILTER_NAME, filter->usmap.name);
6349 route_map_counter_decrement(filter->usmap.map);
6350 filter->usmap.name = XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
6351 filter->usmap.map = route_map;
6352 route_map_counter_increment(route_map);
6353
6354 /* Check if handling a regular peer. */
6355 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6356 /* Set override-flag and process peer route updates. */
6357 SET_FLAG(peer->filter_override[afi][safi][0],
6358 PEER_FT_UNSUPPRESS_MAP);
6359 peer_on_policy_change(peer, afi, safi, 1);
6360
6361 /* Skip peer-group mechanics for regular peers. */
6362 return 0;
6363 }
6364
6365 /*
6366 * Set configuration on all peer-group members, unless they are
6367 * explicitely overriding peer-group configuration.
6368 */
6369 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
6370 /* Skip peers with overridden configuration. */
6371 if (CHECK_FLAG(member->filter_override[afi][safi][0],
6372 PEER_FT_UNSUPPRESS_MAP))
6373 continue;
6374
6375 /* Set configuration on peer-group member. */
6376 filter = &member->filter[afi][safi];
6377 if (filter->usmap.name)
6378 XFREE(MTYPE_BGP_FILTER_NAME, filter->usmap.name);
6379 route_map_counter_decrement(filter->usmap.map);
6380 filter->usmap.name = XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
6381 filter->usmap.map = route_map;
6382 route_map_counter_increment(route_map);
6383
6384 /* Process peer route updates. */
6385 peer_on_policy_change(member, afi, safi, 1);
6386 }
6387
6388 return 0;
6389 }
6390
6391 /* Unset route-map from the peer. */
6392 int peer_unsuppress_map_unset(struct peer *peer, afi_t afi, safi_t safi)
6393 {
6394 struct peer *member;
6395 struct bgp_filter *filter;
6396 struct listnode *node, *nnode;
6397
6398 /* Unset override-flag unconditionally. */
6399 UNSET_FLAG(peer->filter_override[afi][safi][0], PEER_FT_UNSUPPRESS_MAP);
6400
6401 /* Inherit configuration from peer-group if peer is member. */
6402 if (peer_group_active(peer)) {
6403 PEER_STR_ATTR_INHERIT(peer, peer->group,
6404 filter[afi][safi].usmap.name,
6405 MTYPE_BGP_FILTER_NAME);
6406 PEER_ATTR_INHERIT(peer, peer->group,
6407 filter[afi][safi].usmap.map);
6408 } else {
6409 /* Otherwise remove configuration from peer. */
6410 filter = &peer->filter[afi][safi];
6411 if (filter->usmap.name)
6412 XFREE(MTYPE_BGP_FILTER_NAME, filter->usmap.name);
6413 route_map_counter_decrement(filter->usmap.map);
6414 filter->usmap.name = NULL;
6415 filter->usmap.map = NULL;
6416 }
6417
6418 /* Check if handling a regular peer. */
6419 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6420 /* Process peer route updates. */
6421 peer_on_policy_change(peer, afi, safi, 1);
6422
6423 /* Skip peer-group mechanics for regular peers. */
6424 return 0;
6425 }
6426
6427 /*
6428 * Remove configuration on all peer-group members, unless they are
6429 * explicitely overriding peer-group configuration.
6430 */
6431 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
6432 /* Skip peers with overridden configuration. */
6433 if (CHECK_FLAG(member->filter_override[afi][safi][0],
6434 PEER_FT_UNSUPPRESS_MAP))
6435 continue;
6436
6437 /* Remove configuration on peer-group member. */
6438 filter = &member->filter[afi][safi];
6439 if (filter->usmap.name)
6440 XFREE(MTYPE_BGP_FILTER_NAME, filter->usmap.name);
6441 route_map_counter_decrement(filter->usmap.map);
6442 filter->usmap.name = NULL;
6443 filter->usmap.map = NULL;
6444
6445 /* Process peer route updates. */
6446 peer_on_policy_change(member, afi, safi, 1);
6447 }
6448
6449 return 0;
6450 }
6451
6452 int peer_maximum_prefix_set(struct peer *peer, afi_t afi, safi_t safi,
6453 uint32_t max, uint8_t threshold, int warning,
6454 uint16_t restart)
6455 {
6456 struct peer *member;
6457 struct listnode *node, *nnode;
6458
6459 /* Set flags and configuration on peer. */
6460 peer_af_flag_set(peer, afi, safi, PEER_FLAG_MAX_PREFIX);
6461 if (warning)
6462 peer_af_flag_set(peer, afi, safi, PEER_FLAG_MAX_PREFIX_WARNING);
6463 else
6464 peer_af_flag_unset(peer, afi, safi,
6465 PEER_FLAG_MAX_PREFIX_WARNING);
6466
6467 peer->pmax[afi][safi] = max;
6468 peer->pmax_threshold[afi][safi] = threshold;
6469 peer->pmax_restart[afi][safi] = restart;
6470
6471 /* Check if handling a regular peer. */
6472 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6473 /* Re-check if peer violates maximum-prefix. */
6474 if ((peer->status == Established) && (peer->afc[afi][safi]))
6475 bgp_maximum_prefix_overflow(peer, afi, safi, 1);
6476
6477 /* Skip peer-group mechanics for regular peers. */
6478 return 0;
6479 }
6480
6481 /*
6482 * Set flags and configuration on all peer-group members, unless they
6483 * are explicitely overriding peer-group configuration.
6484 */
6485 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
6486 /* Skip peers with overridden configuration. */
6487 if (CHECK_FLAG(member->af_flags_override[afi][safi],
6488 PEER_FLAG_MAX_PREFIX))
6489 continue;
6490
6491 /* Set flag and configuration on peer-group member. */
6492 member->pmax[afi][safi] = max;
6493 member->pmax_threshold[afi][safi] = threshold;
6494 member->pmax_restart[afi][safi] = restart;
6495 if (warning)
6496 SET_FLAG(member->af_flags[afi][safi],
6497 PEER_FLAG_MAX_PREFIX_WARNING);
6498 else
6499 UNSET_FLAG(member->af_flags[afi][safi],
6500 PEER_FLAG_MAX_PREFIX_WARNING);
6501
6502 /* Re-check if peer violates maximum-prefix. */
6503 if ((member->status == Established) && (member->afc[afi][safi]))
6504 bgp_maximum_prefix_overflow(member, afi, safi, 1);
6505 }
6506
6507 return 0;
6508 }
6509
6510 int peer_maximum_prefix_unset(struct peer *peer, afi_t afi, safi_t safi)
6511 {
6512 /* Inherit configuration from peer-group if peer is member. */
6513 if (peer_group_active(peer)) {
6514 peer_af_flag_inherit(peer, afi, safi, PEER_FLAG_MAX_PREFIX);
6515 peer_af_flag_inherit(peer, afi, safi,
6516 PEER_FLAG_MAX_PREFIX_WARNING);
6517 PEER_ATTR_INHERIT(peer, peer->group, pmax[afi][safi]);
6518 PEER_ATTR_INHERIT(peer, peer->group, pmax_threshold[afi][safi]);
6519 PEER_ATTR_INHERIT(peer, peer->group, pmax_restart[afi][safi]);
6520
6521 return 0;
6522 }
6523
6524 /* Remove flags and configuration from peer. */
6525 peer_af_flag_unset(peer, afi, safi, PEER_FLAG_MAX_PREFIX);
6526 peer_af_flag_unset(peer, afi, safi, PEER_FLAG_MAX_PREFIX_WARNING);
6527 peer->pmax[afi][safi] = 0;
6528 peer->pmax_threshold[afi][safi] = 0;
6529 peer->pmax_restart[afi][safi] = 0;
6530
6531 /*
6532 * Remove flags and configuration from all peer-group members, unless
6533 * they are explicitely overriding peer-group configuration.
6534 */
6535 if (CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6536 struct peer *member;
6537 struct listnode *node;
6538
6539 for (ALL_LIST_ELEMENTS_RO(peer->group->peer, node, member)) {
6540 /* Skip peers with overridden configuration. */
6541 if (CHECK_FLAG(member->af_flags_override[afi][safi],
6542 PEER_FLAG_MAX_PREFIX))
6543 continue;
6544
6545 /* Remove flag and configuration on peer-group member.
6546 */
6547 UNSET_FLAG(member->af_flags[afi][safi],
6548 PEER_FLAG_MAX_PREFIX);
6549 UNSET_FLAG(member->af_flags[afi][safi],
6550 PEER_FLAG_MAX_PREFIX_WARNING);
6551 member->pmax[afi][safi] = 0;
6552 member->pmax_threshold[afi][safi] = 0;
6553 member->pmax_restart[afi][safi] = 0;
6554 }
6555 }
6556
6557 return 0;
6558 }
6559
6560 int is_ebgp_multihop_configured(struct peer *peer)
6561 {
6562 struct peer_group *group;
6563 struct listnode *node, *nnode;
6564 struct peer *peer1;
6565
6566 if (CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6567 group = peer->group;
6568 if ((peer_sort(peer) != BGP_PEER_IBGP)
6569 && (group->conf->ttl != BGP_DEFAULT_TTL))
6570 return 1;
6571
6572 for (ALL_LIST_ELEMENTS(group->peer, node, nnode, peer1)) {
6573 if ((peer_sort(peer1) != BGP_PEER_IBGP)
6574 && (peer1->ttl != BGP_DEFAULT_TTL))
6575 return 1;
6576 }
6577 } else {
6578 if ((peer_sort(peer) != BGP_PEER_IBGP)
6579 && (peer->ttl != BGP_DEFAULT_TTL))
6580 return 1;
6581 }
6582 return 0;
6583 }
6584
6585 /* Set # of hops between us and BGP peer. */
6586 int peer_ttl_security_hops_set(struct peer *peer, int gtsm_hops)
6587 {
6588 struct peer_group *group;
6589 struct listnode *node, *nnode;
6590 int ret;
6591
6592 zlog_debug("peer_ttl_security_hops_set: set gtsm_hops to %d for %s",
6593 gtsm_hops, peer->host);
6594
6595 /* We cannot configure ttl-security hops when ebgp-multihop is already
6596 set. For non peer-groups, the check is simple. For peer-groups,
6597 it's
6598 slightly messy, because we need to check both the peer-group
6599 structure
6600 and all peer-group members for any trace of ebgp-multihop
6601 configuration
6602 before actually applying the ttl-security rules. Cisco really made a
6603 mess of this configuration parameter, and OpenBGPD got it right.
6604 */
6605
6606 if ((peer->gtsm_hops == BGP_GTSM_HOPS_DISABLED)
6607 && (peer->sort != BGP_PEER_IBGP)) {
6608 if (is_ebgp_multihop_configured(peer))
6609 return BGP_ERR_NO_EBGP_MULTIHOP_WITH_TTLHACK;
6610
6611 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6612 peer->gtsm_hops = gtsm_hops;
6613
6614 /* Calling ebgp multihop also resets the session.
6615 * On restart, NHT will get setup correctly as will the
6616 * min & max ttls on the socket. The return value is
6617 * irrelevant.
6618 */
6619 ret = peer_ebgp_multihop_set(peer, MAXTTL);
6620
6621 if (ret != 0)
6622 return ret;
6623 } else {
6624 group = peer->group;
6625 for (ALL_LIST_ELEMENTS(group->peer, node, nnode,
6626 peer)) {
6627 peer->gtsm_hops = group->conf->gtsm_hops;
6628
6629 /* Calling ebgp multihop also resets the
6630 * session.
6631 * On restart, NHT will get setup correctly as
6632 * will the
6633 * min & max ttls on the socket. The return
6634 * value is
6635 * irrelevant.
6636 */
6637 peer_ebgp_multihop_set(peer, MAXTTL);
6638 }
6639 }
6640 } else {
6641 /* Post the first gtsm setup or if its ibgp, maxttl setting
6642 * isn't
6643 * necessary, just set the minttl.
6644 */
6645 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6646 peer->gtsm_hops = gtsm_hops;
6647
6648 if (peer->fd >= 0)
6649 sockopt_minttl(peer->su.sa.sa_family, peer->fd,
6650 MAXTTL + 1 - gtsm_hops);
6651 if ((peer->status < Established) && peer->doppelganger
6652 && (peer->doppelganger->fd >= 0))
6653 sockopt_minttl(peer->su.sa.sa_family,
6654 peer->doppelganger->fd,
6655 MAXTTL + 1 - gtsm_hops);
6656 } else {
6657 group = peer->group;
6658 for (ALL_LIST_ELEMENTS(group->peer, node, nnode,
6659 peer)) {
6660 peer->gtsm_hops = group->conf->gtsm_hops;
6661
6662 /* Change setting of existing peer
6663 * established then change value (may break
6664 * connectivity)
6665 * not established yet (teardown session and
6666 * restart)
6667 * no session then do nothing (will get
6668 * handled by next connection)
6669 */
6670 if (peer->fd >= 0
6671 && peer->gtsm_hops
6672 != BGP_GTSM_HOPS_DISABLED)
6673 sockopt_minttl(
6674 peer->su.sa.sa_family, peer->fd,
6675 MAXTTL + 1 - peer->gtsm_hops);
6676 if ((peer->status < Established)
6677 && peer->doppelganger
6678 && (peer->doppelganger->fd >= 0))
6679 sockopt_minttl(peer->su.sa.sa_family,
6680 peer->doppelganger->fd,
6681 MAXTTL + 1 - gtsm_hops);
6682 }
6683 }
6684 }
6685
6686 return 0;
6687 }
6688
6689 int peer_ttl_security_hops_unset(struct peer *peer)
6690 {
6691 struct peer_group *group;
6692 struct listnode *node, *nnode;
6693 int ret = 0;
6694
6695 zlog_debug("peer_ttl_security_hops_unset: set gtsm_hops to zero for %s",
6696 peer->host);
6697
6698 /* if a peer-group member, then reset to peer-group default rather than
6699 * 0 */
6700 if (peer_group_active(peer))
6701 peer->gtsm_hops = peer->group->conf->gtsm_hops;
6702 else
6703 peer->gtsm_hops = BGP_GTSM_HOPS_DISABLED;
6704
6705 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6706 /* Invoking ebgp_multihop_set will set the TTL back to the
6707 * original
6708 * value as well as restting the NHT and such. The session is
6709 * reset.
6710 */
6711 if (peer->sort == BGP_PEER_EBGP)
6712 ret = peer_ebgp_multihop_unset(peer);
6713 else {
6714 if (peer->fd >= 0)
6715 sockopt_minttl(peer->su.sa.sa_family, peer->fd,
6716 0);
6717
6718 if ((peer->status < Established) && peer->doppelganger
6719 && (peer->doppelganger->fd >= 0))
6720 sockopt_minttl(peer->su.sa.sa_family,
6721 peer->doppelganger->fd, 0);
6722 }
6723 } else {
6724 group = peer->group;
6725 for (ALL_LIST_ELEMENTS(group->peer, node, nnode, peer)) {
6726 peer->gtsm_hops = BGP_GTSM_HOPS_DISABLED;
6727 if (peer->sort == BGP_PEER_EBGP)
6728 ret = peer_ebgp_multihop_unset(peer);
6729 else {
6730 if (peer->fd >= 0)
6731 sockopt_minttl(peer->su.sa.sa_family,
6732 peer->fd, 0);
6733
6734 if ((peer->status < Established)
6735 && peer->doppelganger
6736 && (peer->doppelganger->fd >= 0))
6737 sockopt_minttl(peer->su.sa.sa_family,
6738 peer->doppelganger->fd,
6739 0);
6740 }
6741 }
6742 }
6743
6744 return ret;
6745 }
6746
6747 /*
6748 * If peer clear is invoked in a loop for all peers on the BGP instance,
6749 * it may end up freeing the doppelganger, and if this was the next node
6750 * to the current node, we would end up accessing the freed next node.
6751 * Pass along additional parameter which can be updated if next node
6752 * is freed; only required when walking the peer list on BGP instance.
6753 */
6754 int peer_clear(struct peer *peer, struct listnode **nnode)
6755 {
6756 if (!CHECK_FLAG(peer->flags, PEER_FLAG_SHUTDOWN)) {
6757 if (CHECK_FLAG(peer->sflags, PEER_STATUS_PREFIX_OVERFLOW)) {
6758 UNSET_FLAG(peer->sflags, PEER_STATUS_PREFIX_OVERFLOW);
6759 if (peer->t_pmax_restart) {
6760 BGP_TIMER_OFF(peer->t_pmax_restart);
6761 if (bgp_debug_neighbor_events(peer))
6762 zlog_debug(
6763 "%s Maximum-prefix restart timer canceled",
6764 peer->host);
6765 }
6766 BGP_EVENT_ADD(peer, BGP_Start);
6767 return 0;
6768 }
6769
6770 peer->v_start = BGP_INIT_START_TIMER;
6771 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status))
6772 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
6773 BGP_NOTIFY_CEASE_ADMIN_RESET);
6774 else
6775 bgp_session_reset_safe(peer, nnode);
6776 }
6777 return 0;
6778 }
6779
6780 int peer_clear_soft(struct peer *peer, afi_t afi, safi_t safi,
6781 enum bgp_clear_type stype)
6782 {
6783 struct peer_af *paf;
6784
6785 if (peer->status != Established)
6786 return 0;
6787
6788 if (!peer->afc[afi][safi])
6789 return BGP_ERR_AF_UNCONFIGURED;
6790
6791 peer->rtt = sockopt_tcp_rtt(peer->fd);
6792
6793 if (stype == BGP_CLEAR_SOFT_OUT || stype == BGP_CLEAR_SOFT_BOTH) {
6794 /* Clear the "neighbor x.x.x.x default-originate" flag */
6795 paf = peer_af_find(peer, afi, safi);
6796 if (paf && paf->subgroup
6797 && CHECK_FLAG(paf->subgroup->sflags,
6798 SUBGRP_STATUS_DEFAULT_ORIGINATE))
6799 UNSET_FLAG(paf->subgroup->sflags,
6800 SUBGRP_STATUS_DEFAULT_ORIGINATE);
6801
6802 bgp_announce_route(peer, afi, safi);
6803 }
6804
6805 if (stype == BGP_CLEAR_SOFT_IN_ORF_PREFIX) {
6806 if (CHECK_FLAG(peer->af_cap[afi][safi],
6807 PEER_CAP_ORF_PREFIX_SM_ADV)
6808 && (CHECK_FLAG(peer->af_cap[afi][safi],
6809 PEER_CAP_ORF_PREFIX_RM_RCV)
6810 || CHECK_FLAG(peer->af_cap[afi][safi],
6811 PEER_CAP_ORF_PREFIX_RM_OLD_RCV))) {
6812 struct bgp_filter *filter = &peer->filter[afi][safi];
6813 uint8_t prefix_type;
6814
6815 if (CHECK_FLAG(peer->af_cap[afi][safi],
6816 PEER_CAP_ORF_PREFIX_RM_RCV))
6817 prefix_type = ORF_TYPE_PREFIX;
6818 else
6819 prefix_type = ORF_TYPE_PREFIX_OLD;
6820
6821 if (filter->plist[FILTER_IN].plist) {
6822 if (CHECK_FLAG(peer->af_sflags[afi][safi],
6823 PEER_STATUS_ORF_PREFIX_SEND))
6824 bgp_route_refresh_send(
6825 peer, afi, safi, prefix_type,
6826 REFRESH_DEFER, 1);
6827 bgp_route_refresh_send(peer, afi, safi,
6828 prefix_type,
6829 REFRESH_IMMEDIATE, 0);
6830 } else {
6831 if (CHECK_FLAG(peer->af_sflags[afi][safi],
6832 PEER_STATUS_ORF_PREFIX_SEND))
6833 bgp_route_refresh_send(
6834 peer, afi, safi, prefix_type,
6835 REFRESH_IMMEDIATE, 1);
6836 else
6837 bgp_route_refresh_send(peer, afi, safi,
6838 0, 0, 0);
6839 }
6840 return 0;
6841 }
6842 }
6843
6844 if (stype == BGP_CLEAR_SOFT_IN || stype == BGP_CLEAR_SOFT_BOTH
6845 || stype == BGP_CLEAR_SOFT_IN_ORF_PREFIX) {
6846 /* If neighbor has soft reconfiguration inbound flag.
6847 Use Adj-RIB-In database. */
6848 if (CHECK_FLAG(peer->af_flags[afi][safi],
6849 PEER_FLAG_SOFT_RECONFIG))
6850 bgp_soft_reconfig_in(peer, afi, safi);
6851 else {
6852 /* If neighbor has route refresh capability, send route
6853 refresh
6854 message to the peer. */
6855 if (CHECK_FLAG(peer->cap, PEER_CAP_REFRESH_OLD_RCV)
6856 || CHECK_FLAG(peer->cap, PEER_CAP_REFRESH_NEW_RCV))
6857 bgp_route_refresh_send(peer, afi, safi, 0, 0,
6858 0);
6859 else
6860 return BGP_ERR_SOFT_RECONFIG_UNCONFIGURED;
6861 }
6862 }
6863 return 0;
6864 }
6865
6866 /* Display peer uptime.*/
6867 char *peer_uptime(time_t uptime2, char *buf, size_t len, bool use_json,
6868 json_object *json)
6869 {
6870 time_t uptime1, epoch_tbuf;
6871 struct tm tm;
6872
6873 /* If there is no connection has been done before print `never'. */
6874 if (uptime2 == 0) {
6875 if (use_json) {
6876 json_object_string_add(json, "peerUptime", "never");
6877 json_object_int_add(json, "peerUptimeMsec", 0);
6878 } else
6879 snprintf(buf, len, "never");
6880 return buf;
6881 }
6882
6883 /* Get current time. */
6884 uptime1 = bgp_clock();
6885 uptime1 -= uptime2;
6886 gmtime_r(&uptime1, &tm);
6887
6888 if (uptime1 < ONE_DAY_SECOND)
6889 snprintf(buf, len, "%02d:%02d:%02d", tm.tm_hour, tm.tm_min,
6890 tm.tm_sec);
6891 else if (uptime1 < ONE_WEEK_SECOND)
6892 snprintf(buf, len, "%dd%02dh%02dm", tm.tm_yday, tm.tm_hour,
6893 tm.tm_min);
6894 else if (uptime1 < ONE_YEAR_SECOND)
6895 snprintf(buf, len, "%02dw%dd%02dh", tm.tm_yday / 7,
6896 tm.tm_yday - ((tm.tm_yday / 7) * 7), tm.tm_hour);
6897 else
6898 snprintf(buf, len, "%02dy%02dw%dd", tm.tm_year - 70,
6899 tm.tm_yday / 7,
6900 tm.tm_yday - ((tm.tm_yday / 7) * 7));
6901
6902 if (use_json) {
6903 epoch_tbuf = time(NULL) - uptime1;
6904 json_object_string_add(json, "peerUptime", buf);
6905 json_object_int_add(json, "peerUptimeMsec", uptime1 * 1000);
6906 json_object_int_add(json, "peerUptimeEstablishedEpoch",
6907 epoch_tbuf);
6908 }
6909
6910 return buf;
6911 }
6912
6913 void bgp_master_init(struct thread_master *master, const int buffer_size)
6914 {
6915 qobj_init();
6916
6917 memset(&bgp_master, 0, sizeof(struct bgp_master));
6918
6919 bm = &bgp_master;
6920 bm->bgp = list_new();
6921 bm->listen_sockets = list_new();
6922 bm->port = BGP_PORT_DEFAULT;
6923 bm->master = master;
6924 bm->start_time = bgp_clock();
6925 bm->t_rmap_update = NULL;
6926 bm->rmap_update_timer = RMAP_DEFAULT_UPDATE_TIMER;
6927 bm->terminating = false;
6928 bm->socket_buffer = buffer_size;
6929
6930 bgp_process_queue_init();
6931
6932 bgp_mac_init();
6933 /* init the rd id space.
6934 assign 0th index in the bitfield,
6935 so that we start with id 1
6936 */
6937 bf_init(bm->rd_idspace, UINT16_MAX);
6938 bf_assign_zero_index(bm->rd_idspace);
6939
6940 /* mpls label dynamic allocation pool */
6941 bgp_lp_init(bm->master, &bm->labelpool);
6942
6943 bgp_evpn_mh_init();
6944 QOBJ_REG(bm, bgp_master);
6945 }
6946
6947 /*
6948 * Free up connected routes and interfaces for a BGP instance. Invoked upon
6949 * instance delete (non-default only) or BGP exit.
6950 */
6951 static void bgp_if_finish(struct bgp *bgp)
6952 {
6953 struct vrf *vrf;
6954 struct interface *ifp;
6955
6956 vrf = bgp_vrf_lookup_by_instance_type(bgp);
6957
6958 if (bgp->inst_type == BGP_INSTANCE_TYPE_VIEW || !vrf)
6959 return;
6960
6961 FOR_ALL_INTERFACES (vrf, ifp) {
6962 struct listnode *c_node, *c_nnode;
6963 struct connected *c;
6964
6965 for (ALL_LIST_ELEMENTS(ifp->connected, c_node, c_nnode, c))
6966 bgp_connected_delete(bgp, c);
6967 }
6968 }
6969
6970 static void bgp_viewvrf_autocomplete(vector comps, struct cmd_token *token)
6971 {
6972 struct vrf *vrf = NULL;
6973 struct listnode *next;
6974 struct bgp *bgp;
6975
6976 RB_FOREACH (vrf, vrf_name_head, &vrfs_by_name)
6977 vector_set(comps, XSTRDUP(MTYPE_COMPLETION, vrf->name));
6978
6979 for (ALL_LIST_ELEMENTS_RO(bm->bgp, next, bgp)) {
6980 if (bgp->inst_type != BGP_INSTANCE_TYPE_VIEW)
6981 continue;
6982
6983 vector_set(comps, XSTRDUP(MTYPE_COMPLETION, bgp->name));
6984 }
6985 }
6986
6987 static void bgp_instasn_autocomplete(vector comps, struct cmd_token *token)
6988 {
6989 struct listnode *next, *next2;
6990 struct bgp *bgp, *bgp2;
6991 char buf[11];
6992
6993 for (ALL_LIST_ELEMENTS_RO(bm->bgp, next, bgp)) {
6994 /* deduplicate */
6995 for (ALL_LIST_ELEMENTS_RO(bm->bgp, next2, bgp2)) {
6996 if (bgp2->as == bgp->as)
6997 break;
6998 if (bgp2 == bgp)
6999 break;
7000 }
7001 if (bgp2 != bgp)
7002 continue;
7003
7004 snprintf(buf, sizeof(buf), "%u", bgp->as);
7005 vector_set(comps, XSTRDUP(MTYPE_COMPLETION, buf));
7006 }
7007 }
7008
7009 static const struct cmd_variable_handler bgp_viewvrf_var_handlers[] = {
7010 {.tokenname = "VIEWVRFNAME", .completions = bgp_viewvrf_autocomplete},
7011 {.varname = "instasn", .completions = bgp_instasn_autocomplete},
7012 {.completions = NULL},
7013 };
7014
7015 struct frr_pthread *bgp_pth_io;
7016 struct frr_pthread *bgp_pth_ka;
7017
7018 static void bgp_pthreads_init(void)
7019 {
7020 assert(!bgp_pth_io);
7021 assert(!bgp_pth_ka);
7022
7023 struct frr_pthread_attr io = {
7024 .start = frr_pthread_attr_default.start,
7025 .stop = frr_pthread_attr_default.stop,
7026 };
7027 struct frr_pthread_attr ka = {
7028 .start = bgp_keepalives_start,
7029 .stop = bgp_keepalives_stop,
7030 };
7031 bgp_pth_io = frr_pthread_new(&io, "BGP I/O thread", "bgpd_io");
7032 bgp_pth_ka = frr_pthread_new(&ka, "BGP Keepalives thread", "bgpd_ka");
7033 }
7034
7035 void bgp_pthreads_run(void)
7036 {
7037 frr_pthread_run(bgp_pth_io, NULL);
7038 frr_pthread_run(bgp_pth_ka, NULL);
7039
7040 /* Wait until threads are ready. */
7041 frr_pthread_wait_running(bgp_pth_io);
7042 frr_pthread_wait_running(bgp_pth_ka);
7043 }
7044
7045 void bgp_pthreads_finish(void)
7046 {
7047 frr_pthread_stop_all();
7048 }
7049
7050 void bgp_init(unsigned short instance)
7051 {
7052
7053 /* allocates some vital data structures used by peer commands in
7054 * vty_init */
7055
7056 /* pre-init pthreads */
7057 bgp_pthreads_init();
7058
7059 /* Init zebra. */
7060 bgp_zebra_init(bm->master, instance);
7061
7062 #ifdef ENABLE_BGP_VNC
7063 vnc_zebra_init(bm->master);
7064 #endif
7065
7066 /* BGP VTY commands installation. */
7067 bgp_vty_init();
7068
7069 /* BGP inits. */
7070 bgp_attr_init();
7071 bgp_debug_init();
7072 bgp_dump_init();
7073 bgp_route_init();
7074 bgp_route_map_init();
7075 bgp_scan_vty_init();
7076 bgp_mplsvpn_init();
7077 #ifdef ENABLE_BGP_VNC
7078 rfapi_init();
7079 #endif
7080 bgp_ethernetvpn_init();
7081 bgp_flowspec_vty_init();
7082
7083 /* Access list initialize. */
7084 access_list_init();
7085 access_list_add_hook(peer_distribute_update);
7086 access_list_delete_hook(peer_distribute_update);
7087
7088 /* Filter list initialize. */
7089 bgp_filter_init();
7090 as_list_add_hook(peer_aslist_add);
7091 as_list_delete_hook(peer_aslist_del);
7092
7093 /* Prefix list initialize.*/
7094 prefix_list_init();
7095 prefix_list_add_hook(peer_prefix_list_update);
7096 prefix_list_delete_hook(peer_prefix_list_update);
7097
7098 /* Community list initialize. */
7099 bgp_clist = community_list_init();
7100
7101 /* BFD init */
7102 bgp_bfd_init();
7103
7104 cmd_variable_handler_register(bgp_viewvrf_var_handlers);
7105 }
7106
7107 void bgp_terminate(void)
7108 {
7109 struct bgp *bgp;
7110 struct peer *peer;
7111 struct listnode *node, *nnode;
7112 struct listnode *mnode, *mnnode;
7113
7114 QOBJ_UNREG(bm);
7115
7116 /* Close the listener sockets first as this prevents peers from
7117 * attempting
7118 * to reconnect on receiving the peer unconfig message. In the presence
7119 * of a large number of peers this will ensure that no peer is left with
7120 * a dangling connection
7121 */
7122 /* reverse bgp_master_init */
7123 bgp_close();
7124
7125 if (bm->listen_sockets)
7126 list_delete(&bm->listen_sockets);
7127
7128 for (ALL_LIST_ELEMENTS(bm->bgp, mnode, mnnode, bgp))
7129 for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer))
7130 if (peer->status == Established
7131 || peer->status == OpenSent
7132 || peer->status == OpenConfirm)
7133 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
7134 BGP_NOTIFY_CEASE_PEER_UNCONFIG);
7135
7136 if (bm->process_main_queue)
7137 work_queue_free_and_null(&bm->process_main_queue);
7138
7139 if (bm->t_rmap_update)
7140 BGP_TIMER_OFF(bm->t_rmap_update);
7141
7142 bgp_mac_finish();
7143 bgp_evpn_mh_finish();
7144 }
7145
7146 struct peer *peer_lookup_in_view(struct vty *vty, struct bgp *bgp,
7147 const char *ip_str, bool use_json)
7148 {
7149 int ret;
7150 struct peer *peer;
7151 union sockunion su;
7152
7153 /* Get peer sockunion. */
7154 ret = str2sockunion(ip_str, &su);
7155 if (ret < 0) {
7156 peer = peer_lookup_by_conf_if(bgp, ip_str);
7157 if (!peer) {
7158 peer = peer_lookup_by_hostname(bgp, ip_str);
7159
7160 if (!peer) {
7161 if (use_json) {
7162 json_object *json_no = NULL;
7163 json_no = json_object_new_object();
7164 json_object_string_add(
7165 json_no,
7166 "malformedAddressOrName",
7167 ip_str);
7168 vty_out(vty, "%s\n",
7169 json_object_to_json_string_ext(
7170 json_no,
7171 JSON_C_TO_STRING_PRETTY));
7172 json_object_free(json_no);
7173 } else
7174 vty_out(vty,
7175 "%% Malformed address or name: %s\n",
7176 ip_str);
7177 return NULL;
7178 }
7179 }
7180 return peer;
7181 }
7182
7183 /* Peer structure lookup. */
7184 peer = peer_lookup(bgp, &su);
7185 if (!peer) {
7186 if (use_json) {
7187 json_object *json_no = NULL;
7188 json_no = json_object_new_object();
7189 json_object_string_add(json_no, "warning",
7190 "No such neighbor in this view/vrf");
7191 vty_out(vty, "%s\n",
7192 json_object_to_json_string_ext(
7193 json_no, JSON_C_TO_STRING_PRETTY));
7194 json_object_free(json_no);
7195 } else
7196 vty_out(vty, "No such neighbor in this view/vrf\n");
7197 return NULL;
7198 }
7199
7200 return peer;
7201 }
7202
7203 void bgp_gr_apply_running_config(void)
7204 {
7205 struct peer *peer = NULL;
7206 struct bgp *bgp = NULL;
7207 struct listnode *node, *nnode;
7208 bool gr_router_detected = false;
7209
7210 if (BGP_DEBUG(graceful_restart, GRACEFUL_RESTART))
7211 zlog_debug("[BGP_GR] %s called !", __func__);
7212
7213 for (ALL_LIST_ELEMENTS(bm->bgp, node, nnode, bgp)) {
7214 for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) {
7215 bgp_peer_gr_flags_update(peer);
7216 if (CHECK_FLAG(peer->flags, PEER_FLAG_GRACEFUL_RESTART))
7217 gr_router_detected = true;
7218 }
7219
7220 if (gr_router_detected
7221 && bgp->present_zebra_gr_state == ZEBRA_GR_DISABLE) {
7222 bgp_zebra_send_capabilities(bgp, true);
7223 } else if (!gr_router_detected
7224 && bgp->present_zebra_gr_state == ZEBRA_GR_ENABLE) {
7225 bgp_zebra_send_capabilities(bgp, false);
7226 }
7227
7228 gr_router_detected = false;
7229 }
7230 }
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