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bgpd: peer restart after shutdown fix.
[mirror_frr.git] / bgpd / bgpd.c
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718e3744 1/* BGP-4, BGP-4+ daemon program
896014f4
DL		 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 */
718e3744 20
21#include <zebra.h>
22
23#include "prefix.h"
24#include "thread.h"
25#include "buffer.h"
26#include "stream.h"
74ffbfe6 27#include "ringbuf.h"
718e3744 28#include "command.h"
29#include "sockunion.h"
e9a0c656 30#include "sockopt.h"
718e3744 31#include "network.h"
32#include "memory.h"
33#include "filter.h"
34#include "routemap.h"
718e3744 35#include "log.h"
36#include "plist.h"
37#include "linklist.h"
200df115 38#include "workqueue.h"
3f9c7369 39#include "queue.h"
88177fe3 40#include "zclient.h"
7f342629 41#include "bfd.h"
dd793e4a
DW		 42#include "hash.h"
43#include "jhash.h"
587ff0fd 44#include "table.h"
4dcadbef 45#include "lib/json.h"
0ca8b79f 46#include "frr_pthread.h"
92708db6 47#include "bitfield.h"
718e3744 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"
14454c9f 55#include "bgpd/bgp_errors.h"
718e3744 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"
49e5a4a0 68#ifdef ENABLE_BGP_VNC
f8b6f499
LB		 69#include "bgpd/rfapi/bgp_rfapi_cfg.h"
70#include "bgpd/rfapi/rfapi_backend.h"
65efcfce 71#endif
7ef5a232 72#include "bgpd/bgp_evpn.h"
718e3744 73#include "bgpd/bgp_advertise.h"
74#include "bgpd/bgp_network.h"
75#include "bgpd/bgp_vty.h"
165b5fff 76#include "bgpd/bgp_mpath.h"
fc9a856f 77#include "bgpd/bgp_nht.h"
3f9c7369 78#include "bgpd/bgp_updgrp.h"
c43ed2e4 79#include "bgpd/bgp_bfd.h"
4a1ab8e4 80#include "bgpd/bgp_memory.h"
784d3a42 81#include "bgpd/bgp_evpn_vty.h"
2d4ee774 82#include "bgpd/bgp_keepalives.h"
56257a44 83#include "bgpd/bgp_io.h"
41d6d607 84#include "bgpd/bgp_ecommunity.h"
7c40bf39 85#include "bgpd/bgp_flowspec.h"
955bfd98 86#include "bgpd/bgp_labelpool.h"
f3d32faa 87#include "bgpd/bgp_pbr.h"
dcc68b5e 88#include "bgpd/bgp_addpath.h"
85c8d83b 89#include "bgpd/bgp_evpn_private.h"
c44ab6f1 90#include "bgpd/bgp_evpn_mh.h"
48ecf8f5 91#include "bgpd/bgp_mac.h"
73d70fa6
DL		 92
93DEFINE_MTYPE_STATIC(BGPD, PEER_TX_SHUTDOWN_MSG, "Peer shutdown message (TX)");
85c8d83b 94DEFINE_MTYPE_STATIC(BGPD, BGP_EVPN_INFO, "BGP EVPN instance information");
19df7279
DL		 95DEFINE_QOBJ_TYPE(bgp_master)
96DEFINE_QOBJ_TYPE(bgp)
97DEFINE_QOBJ_TYPE(peer)
2b9bcf30 98DEFINE_HOOK(bgp_inst_delete, (struct bgp *bgp), (bgp))
19df7279 99
718e3744 100/* BGP process wide configuration. */
101static struct bgp_master bgp_master;
102
103/* BGP process wide configuration pointer to export. */
104struct bgp_master *bm;
105
106/* BGP community-list. */
107struct community_list_handler *bgp_clist;
6b0655a2 108
37fe7731
DS		 109unsigned int multipath_num = MULTIPATH_NUM;
110
d62a17ae 111static void bgp_if_finish(struct bgp *bgp);
cc32742c 112static void peer_drop_dynamic_neighbor(struct peer *peer);
b33adb7c 113
ad4cbda1 114extern struct zclient *zclient;
1ff9a340 115
e5619c28
PG		 116/* handle main socket creation or deletion */
117static int bgp_check_main_socket(bool create, struct bgp *bgp)
118{
119 static int bgp_server_main_created;
e5619c28 120
d8729f8c 121 if (create) {
e5619c28
PG		 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;
e5619c28
PG		 131 bgp_close();
132 bgp_server_main_created = 0;
133 return 0;
134}
135
d62a17ae 136void bgp_session_reset(struct peer *peer)
1ff9a340 137{
d62a17ae 138 if (peer->doppelganger && (peer->doppelganger->status != Deleted)
139 && !(CHECK_FLAG(peer->doppelganger->flags, PEER_FLAG_CONFIG_NODE)))
140 peer_delete(peer->doppelganger);
1ff9a340 141
d62a17ae 142 BGP_EVENT_ADD(peer, BGP_Stop);
1ff9a340
DS		 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 */
d62a17ae 151static void bgp_session_reset_safe(struct peer *peer, struct listnode **nnode)
1ff9a340 152{
d62a17ae 153 struct listnode *n;
154 struct peer *npeer;
1ff9a340 155
d62a17ae 156 n = (nnode) ? *nnode : NULL;
157 npeer = (n) ? listgetdata(n) : NULL;
1ff9a340 158
d62a17ae 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 }
1ff9a340 167
d62a17ae 168 BGP_EVENT_ADD(peer, BGP_Stop);
1ff9a340
DS		 169}
170
718e3744 171/* BGP global flag manipulation. */
d62a17ae 172int bgp_option_set(int flag)
173{
174 switch (flag) {
175 case BGP_OPT_NO_FIB:
d62a17ae 176 case BGP_OPT_NO_LISTEN:
0b014ea6 177 case BGP_OPT_NO_ZEBRA:
d62a17ae 178 SET_FLAG(bm->options, flag);
179 break;
180 default:
181 return BGP_ERR_INVALID_FLAG;
182 }
183 return 0;
184}
185
186int bgp_option_unset(int flag)
187{
188 switch (flag) {
d62a17ae 189 /* Fall through. */
0b014ea6 190 case BGP_OPT_NO_ZEBRA:
d62a17ae 191 case BGP_OPT_NO_FIB:
d62a17ae 192 UNSET_FLAG(bm->options, flag);
193 break;
194 default:
195 return BGP_ERR_INVALID_FLAG;
196 }
197 return 0;
198}
199
200int bgp_option_check(int flag)
201{
202 return CHECK_FLAG(bm->options, flag);
718e3744 203}
6b0655a2 204
718e3744 205/* Internal function to set BGP structure configureation flag. */
d62a17ae 206static void bgp_config_set(struct bgp *bgp, int config)
718e3744 207{
d62a17ae 208 SET_FLAG(bgp->config, config);
718e3744 209}
210
d62a17ae 211static void bgp_config_unset(struct bgp *bgp, int config)
718e3744 212{
d62a17ae 213 UNSET_FLAG(bgp->config, config);
718e3744 214}
215
d62a17ae 216static int bgp_config_check(struct bgp *bgp, int config)
718e3744 217{
d62a17ae 218 return CHECK_FLAG(bgp->config, config);
718e3744 219}
6b0655a2 220
e65fe398
MS		 221/* Set BGP router identifier; distinguish between explicit config and other
222 * cases.
223 */
224static int bgp_router_id_set(struct bgp *bgp, const struct in_addr *id,
225 bool is_config)
718e3744 226{
d62a17ae 227 struct peer *peer;
228 struct listnode *node, *nnode;
718e3744 229
d62a17ae 230 if (IPV4_ADDR_SAME(&bgp->router_id, id))
231 return 0;
718e3744 232
d62a17ae 233 /* EVPN uses router id in RD, withdraw them */
94c2f693 234 if (is_evpn_enabled())
2951a7a4 235 bgp_evpn_handle_router_id_update(bgp, true);
2d48ee25 236
2951a7a4 237 vpn_handle_router_id_update(bgp, true, is_config);
636f7608 238
d62a17ae 239 IPV4_ADDR_COPY(&bgp->router_id, id);
718e3744 240
d62a17ae 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);
718e3744 244
d62a17ae 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 }
14c1a7bf 251
d62a17ae 252 /* EVPN uses router id in RD, update them */
94c2f693 253 if (is_evpn_enabled())
2951a7a4 254 bgp_evpn_handle_router_id_update(bgp, false);
2d48ee25 255
2951a7a4 256 vpn_handle_router_id_update(bgp, false, is_config);
636f7608 257
d62a17ae 258 return 0;
718e3744 259}
260
d62a17ae 261void bgp_router_id_zebra_bump(vrf_id_t vrf_id, const struct prefix *router_id)
0e6cb743 262{
d62a17ae 263 struct listnode *node, *nnode;
264 struct bgp *bgp;
36dc7588 265 struct in_addr *addr = NULL;
266
267 if (router_id != NULL)
268 addr = (struct in_addr *)&(router_id->u.prefix4);
0e6cb743 269
d62a17ae 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;
0e6cb743 276
36dc7588 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))
137147c6
DS		 288 zlog_debug(
289 "RID change : vrf %s(%u), RTR ID %s",
290 bgp->name_pretty,
291 bgp->vrf_id,
292 inet_ntoa(*addr));
2951a7a4 293 bgp_router_id_set(bgp, addr, false);
36dc7588 294 }
295 }
d62a17ae 296 }
297 } else {
298 bgp = bgp_lookup_by_vrf_id(vrf_id);
299 if (bgp) {
36dc7588 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))
137147c6
DS		 311 zlog_debug(
312 "RID change : vrf %s(%u), RTR ID %s",
313 bgp->name_pretty,
314 bgp->vrf_id,
315 inet_ntoa(*addr));
2951a7a4 316 bgp_router_id_set(bgp, addr, false);
36dc7588 317 }
318 }
0e6cb743 319
d62a17ae 320 }
321 }
0e6cb743
DL		 322}
323
3dc339cd 324void bgp_router_id_static_set(struct bgp *bgp, struct in_addr id)
0e6cb743 325{
d62a17ae 326 bgp->router_id_static = id;
975a328e
DA		 327 bgp_router_id_set(bgp,
328 id.s_addr != INADDR_ANY ? &id : &bgp->router_id_zebra,
2951a7a4 329 true /* is config */);
0e6cb743
DL		 330}
331
718e3744 332/* BGP's cluster-id control. */
d62a17ae 333int bgp_cluster_id_set(struct bgp *bgp, struct in_addr *cluster_id)
718e3744 334{
d62a17ae 335 struct peer *peer;
336 struct listnode *node, *nnode;
718e3744 337
d62a17ae 338 if (bgp_config_check(bgp, BGP_CONFIG_CLUSTER_ID)
339 && IPV4_ADDR_SAME(&bgp->cluster_id, cluster_id))
340 return 0;
718e3744 341
d62a17ae 342 IPV4_ADDR_COPY(&bgp->cluster_id, cluster_id);
343 bgp_config_set(bgp, BGP_CONFIG_CLUSTER_ID);
718e3744 344
d62a17ae 345 /* Clear all IBGP peer. */
346 for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) {
347 if (peer->sort != BGP_PEER_IBGP)
348 continue;
718e3744 349
d62a17ae 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;
718e3744 357}
358
d62a17ae 359int bgp_cluster_id_unset(struct bgp *bgp)
718e3744 360{
d62a17ae 361 struct peer *peer;
362 struct listnode *node, *nnode;
718e3744 363
d62a17ae 364 if (!bgp_config_check(bgp, BGP_CONFIG_CLUSTER_ID))
365 return 0;
718e3744 366
d62a17ae 367 bgp->cluster_id.s_addr = 0;
368 bgp_config_unset(bgp, BGP_CONFIG_CLUSTER_ID);
718e3744 369
d62a17ae 370 /* Clear all IBGP peer. */
371 for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) {
372 if (peer->sort != BGP_PEER_IBGP)
373 continue;
718e3744 374
d62a17ae 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;
718e3744 382}
6b0655a2 383
65957886
SH		 384/* time_t value that is monotonicly increasing
385 * and uneffected by adjustments to system clock
386 */
d62a17ae 387time_t bgp_clock(void)
65957886 388{
d62a17ae 389 struct timeval tv;
65957886 390
d62a17ae 391 monotime(&tv);
392 return tv.tv_sec;
65957886
SH		 393}
394
718e3744 395/* BGP timer configuration. */
3dc339cd
DA		 396void bgp_timers_set(struct bgp *bgp, uint32_t keepalive, uint32_t holdtime,
397 uint32_t connect_retry)
718e3744 398{
d62a17ae 399 bgp->default_keepalive =
400 (keepalive < holdtime / 3 ? keepalive : holdtime / 3);
401 bgp->default_holdtime = holdtime;
5d5393b9 402 bgp->default_connect_retry = connect_retry;
718e3744 403}
404
5d5393b9 405/* mostly for completeness - CLI uses its own defaults */
3dc339cd 406void bgp_timers_unset(struct bgp *bgp)
718e3744 407{
d62a17ae 408 bgp->default_keepalive = BGP_DEFAULT_KEEPALIVE;
409 bgp->default_holdtime = BGP_DEFAULT_HOLDTIME;
5d5393b9 410 bgp->default_connect_retry = BGP_DEFAULT_CONNECT_RETRY;
718e3744 411}
6b0655a2 412
718e3744 413/* BGP confederation configuration. */
d62a17ae 414int 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)) {
469cbb0f
DS		 432 bgp_peer_sort_t ptype = peer_sort(peer);
433
d62a17ae 434 /* We're looking for peers who's AS is not local or part of our
435 confederation. */
436 if (already_confed) {
469cbb0f 437 if (ptype == BGP_PEER_EBGP) {
d62a17ae 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 */
469cbb0f 453 if (ptype != BGP_PEER_IBGP) {
d62a17ae 454 /* Reset the local_as to be our EBGP one */
469cbb0f 455 if (ptype == BGP_PEER_EBGP)
d62a17ae 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 }
718e3744 468 }
d62a17ae 469 return 0;
718e3744 470}
471
d62a17ae 472int bgp_confederation_id_unset(struct bgp *bgp)
718e3744 473{
d62a17ae 474 struct peer *peer;
475 struct listnode *node, *nnode;
476
477 bgp->confed_id = 0;
478 bgp_config_unset(bgp, BGP_CONFIG_CONFEDERATION);
718e3744 479
d62a17ae 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 }
718e3744 489
d62a17ae 490 else
491 bgp_session_reset_safe(peer, &nnode);
492 }
493 }
494 return 0;
718e3744 495}
496
d62a17ae 497/* Is an AS part of the confed or not? */
3dc339cd 498bool bgp_confederation_peers_check(struct bgp *bgp, as_t as)
718e3744 499{
d62a17ae 500 int i;
718e3744 501
d62a17ae 502 if (!bgp)
3dc339cd 503 return false;
718e3744 504
d62a17ae 505 for (i = 0; i < bgp->confed_peers_cnt; i++)
506 if (bgp->confed_peers[i] == as)
3dc339cd 507 return true;
718e3744 508
3dc339cd 509 return false;
d62a17ae 510}
718e3744 511
d62a17ae 512/* Add an AS to the confederation set. */
513int 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;
718e3744 556}
557
558/* Delete an AS from the confederation set. */
d62a17ae 559int 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 }
718e3744 605 }
718e3744 606
d62a17ae 607 return 0;
718e3744 608}
6b0655a2 609
718e3744 610/* Local preference configuration. */
d7c0a89a 611int bgp_default_local_preference_set(struct bgp *bgp, uint32_t local_pref)
718e3744 612{
d62a17ae 613 if (!bgp)
614 return -1;
718e3744 615
d62a17ae 616 bgp->default_local_pref = local_pref;
718e3744 617
d62a17ae 618 return 0;
718e3744 619}
620
d62a17ae 621int bgp_default_local_preference_unset(struct bgp *bgp)
718e3744 622{
d62a17ae 623 if (!bgp)
624 return -1;
718e3744 625
d62a17ae 626 bgp->default_local_pref = BGP_DEFAULT_LOCAL_PREF;
718e3744 627
d62a17ae 628 return 0;
718e3744 629}
6b0655a2 630
3f9c7369 631/* Local preference configuration. */
d7c0a89a 632int bgp_default_subgroup_pkt_queue_max_set(struct bgp *bgp, uint32_t queue_size)
3f9c7369 633{
d62a17ae 634 if (!bgp)
635 return -1;
3f9c7369 636
d62a17ae 637 bgp->default_subgroup_pkt_queue_max = queue_size;
3f9c7369 638
d62a17ae 639 return 0;
3f9c7369
DS		 640}
641
d62a17ae 642int bgp_default_subgroup_pkt_queue_max_unset(struct bgp *bgp)
3f9c7369 643{
d62a17ae 644 if (!bgp)
645 return -1;
646 bgp->default_subgroup_pkt_queue_max =
647 BGP_DEFAULT_SUBGROUP_PKT_QUEUE_MAX;
3f9c7369 648
d62a17ae 649 return 0;
3f9c7369
DS		 650}
651
f14e6fdb 652/* Listen limit configuration. */
d62a17ae 653int bgp_listen_limit_set(struct bgp *bgp, int listen_limit)
f14e6fdb 654{
d62a17ae 655 if (!bgp)
656 return -1;
f14e6fdb 657
d62a17ae 658 bgp->dynamic_neighbors_limit = listen_limit;
f14e6fdb 659
d62a17ae 660 return 0;
f14e6fdb
DS		 661}
662
d62a17ae 663int bgp_listen_limit_unset(struct bgp *bgp)
f14e6fdb 664{
d62a17ae 665 if (!bgp)
666 return -1;
f14e6fdb 667
d62a17ae 668 bgp->dynamic_neighbors_limit = BGP_DYNAMIC_NEIGHBORS_LIMIT_DEFAULT;
f14e6fdb 669
d62a17ae 670 return 0;
f14e6fdb
DS		 671}
672
5c525538
RW		 673int bgp_map_afi_safi_iana2int(iana_afi_t pkt_afi, iana_safi_t pkt_safi,
674 afi_t *afi, safi_t *safi)
9cabb64b 675{
d62a17ae 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;
9cabb64b 683
d62a17ae 684 return 0;
9cabb64b 685}
686
d62a17ae 687int bgp_map_afi_safi_int2iana(afi_t afi, safi_t safi, iana_afi_t *pkt_afi,
5c525538 688 iana_safi_t *pkt_safi)
9cabb64b 689{
d62a17ae 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;
9cabb64b 698}
699
d62a17ae 700struct peer_af *peer_af_create(struct peer *peer, afi_t afi, safi_t safi)
3f9c7369 701{
d62a17ae 702 struct peer_af *af;
703 int afid;
210ec2a0 704 struct bgp *bgp;
3f9c7369 705
d62a17ae 706 if (!peer)
707 return NULL;
3f9c7369 708
d62a17ae 709 afid = afindex(afi, safi);
710 if (afid >= BGP_AF_MAX)
711 return NULL;
3f9c7369 712
210ec2a0 713 bgp = peer->bgp;
d62a17ae 714 assert(peer->peer_af_array[afid] == NULL);
3f9c7369 715
d62a17ae 716 /* Allocate new peer af */
717 af = XCALLOC(MTYPE_BGP_PEER_AF, sizeof(struct peer_af));
c8560b44 718
d62a17ae 719 peer->peer_af_array[afid] = af;
720 af->afi = afi;
721 af->safi = safi;
722 af->afid = afid;
723 af->peer = peer;
210ec2a0 724 bgp->af_peer_count[afi][safi]++;
3f9c7369 725
d62a17ae 726 return af;
3f9c7369
DS		 727}
728
d62a17ae 729struct peer_af *peer_af_find(struct peer *peer, afi_t afi, safi_t safi)
3f9c7369 730{
d62a17ae 731 int afid;
3f9c7369 732
d62a17ae 733 if (!peer)
734 return NULL;
3f9c7369 735
d62a17ae 736 afid = afindex(afi, safi);
737 if (afid >= BGP_AF_MAX)
738 return NULL;
3f9c7369 739
d62a17ae 740 return peer->peer_af_array[afid];
3f9c7369
DS		 741}
742
d62a17ae 743int peer_af_delete(struct peer *peer, afi_t afi, safi_t safi)
3f9c7369 744{
d62a17ae 745 struct peer_af *af;
746 int afid;
210ec2a0 747 struct bgp *bgp;
3f9c7369 748
d62a17ae 749 if (!peer)
750 return -1;
3f9c7369 751
d62a17ae 752 afid = afindex(afi, safi);
753 if (afid >= BGP_AF_MAX)
754 return -1;
3f9c7369 755
d62a17ae 756 af = peer->peer_af_array[afid];
757 if (!af)
758 return -1;
3f9c7369 759
210ec2a0 760 bgp = peer->bgp;
d62a17ae 761 bgp_stop_announce_route_timer(af);
3f9c7369 762
d62a17ae 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 }
3f9c7369 769
210ec2a0 770
d62a17ae 771 update_subgroup_remove_peer(af->subgroup, af);
3f9c7369 772
210ec2a0
AS		 773 if (bgp->af_peer_count[afi][safi])
774 bgp->af_peer_count[afi][safi]--;
775
d62a17ae 776 peer->peer_af_array[afid] = NULL;
777 XFREE(MTYPE_BGP_PEER_AF, af);
778 return 0;
3f9c7369
DS		 779}
780
eb821189 781/* Peer comparison function for sorting. */
d62a17ae 782int peer_cmp(struct peer *p1, struct peer *p2)
718e3744 783{
d62a17ae 784 if (p1->group && !p2->group)
785 return -1;
0aaa34db 786
d62a17ae 787 if (!p1->group && p2->group)
788 return 1;
0aaa34db 789
d62a17ae 790 if (p1->group == p2->group) {
791 if (p1->conf_if && !p2->conf_if)
792 return -1;
0aaa34db 793
d62a17ae 794 if (!p1->conf_if && p2->conf_if)
795 return 1;
0aaa34db 796
d62a17ae 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);
0aaa34db 801
d62a17ae 802 return sockunion_cmp(&p1->su, &p2->su);
718e3744 803}
804
d8b87afe 805static unsigned int peer_hash_key_make(const void *p)
dd793e4a 806{
d8b87afe 807 const struct peer *peer = p;
d62a17ae 808 return sockunion_hash(&peer->su);
dd793e4a
DW		 809}
810
74df8d6d 811static bool peer_hash_same(const void *p1, const void *p2)
dd793e4a 812{
d62a17ae 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));
dd793e4a
DW		 818}
819
9fb964de
PM		 820void 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
d7c0a89a 844int peer_af_flag_check(struct peer *peer, afi_t afi, safi_t safi, uint32_t flag)
718e3744 845{
d62a17ae 846 return CHECK_FLAG(peer->af_flags[afi][safi], flag);
718e3744 847}
848
598ce6bd
PM		 849void peer_af_flag_inherit(struct peer *peer, afi_t afi, safi_t safi,
850 uint32_t flag)
88b8ed8d 851{
527de3dc
PM		 852 bool group_val;
853
598ce6bd
PM		 854 /* Skip if peer is not a peer-group member. */
855 if (!peer_group_active(peer))
856 return;
88b8ed8d 857
598ce6bd
PM		 858 /* Unset override flag to signal inheritance from peer-group. */
859 UNSET_FLAG(peer->af_flags_override[afi][safi], flag);
88b8ed8d 860
527de3dc
PM		 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);
598ce6bd 870 else
527de3dc 871 COND_FLAG(peer->af_flags[afi][safi], flag, group_val);
598ce6bd 872}
88b8ed8d 873
6d85b15b 874/* Check peer's AS number and determines if this peer is IBGP or EBGP */
82417ac2 875static inline bgp_peer_sort_t peer_calc_sort(struct peer *peer)
718e3744 876{
d62a17ae 877 struct bgp *bgp;
718e3744 878
d62a17ae 879 bgp = peer->bgp;
718e3744 880
d62a17ae 881 /* Peer-group */
882 if (CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
883 if (peer->as_type == AS_INTERNAL)
884 return BGP_PEER_IBGP;
66b199b2 885
d62a17ae 886 else if (peer->as_type == AS_EXTERNAL)
887 return BGP_PEER_EBGP;
66b199b2 888
b575a12c
A		 889 else if (peer->as_type == AS_SPECIFIED && peer->as) {
890 assert(bgp);
d62a17ae 891 return (bgp->as == peer->as ? BGP_PEER_IBGP
892 : BGP_PEER_EBGP);
b575a12c 893 }
66b199b2 894
d62a17ae 895 else {
896 struct peer *peer1;
d4f8b537 897
898 assert(peer->group);
d62a17ae 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 {
faa16034
DS		 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)
d62a17ae 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 }
718e3744 959}
960
6d85b15b 961/* Calculate and cache the peer "sort" */
d62a17ae 962bgp_peer_sort_t peer_sort(struct peer *peer)
963{
964 peer->sort = peer_calc_sort(peer);
965 return peer->sort;
966}
967
bf0d28dc
DS		 968bgp_peer_sort_t peer_sort_lookup(struct peer *peer)
969{
970 return peer->sort;
971}
972
d62a17ae 973static void peer_free(struct peer *peer)
974{
dcc68b5e
MS		 975 afi_t afi;
976 safi_t safi;
977
d62a17ae 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);
424ab01d
QY		 986 bgp_reads_off(peer);
987 bgp_writes_off(peer);
988 assert(!peer->t_write);
989 assert(!peer->t_read);
d62a17ae 990 BGP_EVENT_FLUSH(peer);
991
424ab01d
QY		 992 pthread_mutex_destroy(&peer->io_mtx);
993
d62a17ae 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
e1b36e13
QY		 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);
d62a17ae 1006
1007 /* Update source configuration. */
1008 if (peer->update_source) {
1009 sockunion_free(peer->update_source);
1010 peer->update_source = NULL;
1011 }
1012
e1b36e13 1013 XFREE(MTYPE_PEER_UPDATE_SOURCE, peer->update_if);
d62a17ae 1014
0a22ddfb 1015 XFREE(MTYPE_TMP, peer->notify.data);
d62a17ae 1016 memset(&peer->notify, 0, sizeof(struct bgp_notify));
1017
e208c8f9
DS		 1018 if (peer->clear_node_queue)
1019 work_queue_free_and_null(&peer->clear_node_queue);
d62a17ae 1020
1021 bgp_sync_delete(peer);
1022
e1b36e13 1023 XFREE(MTYPE_PEER_CONF_IF, peer->conf_if);
d62a17ae 1024
1025 bfd_info_free(&(peer->bfd_info));
1026
dcc68b5e
MS		 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
d62a17ae 1034 bgp_unlock(peer->bgp);
1035
1036 memset(peer, 0, sizeof(struct peer));
1037
1038 XFREE(MTYPE_BGP_PEER, peer);
1039}
1040
200df115 1041/* increase reference count on a struct peer */
d62a17ae 1042struct peer *peer_lock_with_caller(const char *name, struct peer *peer)
200df115 1043{
d62a17ae 1044 assert(peer && (peer->lock >= 0));
28066f4b
DS		 1045
1046#if 0
1047 zlog_debug("%s peer_lock %p %d", name, peer, peer->lock);
1048#endif
d62a17ae 1049
1050 peer->lock++;
1051
1052 return peer;
200df115 1053}
1054
1055/* decrease reference count on a struct peer
1056 * struct peer is freed and NULL returned if last reference
1057 */
d62a17ae 1058struct peer *peer_unlock_with_caller(const char *name, struct peer *peer)
200df115 1059{
d62a17ae 1060 assert(peer && (peer->lock > 0));
28066f4b
DS		 1061
1062#if 0
1063 zlog_debug("%s peer_unlock %p %d", name, peer, peer->lock);
1064#endif
200df115 1065
d62a17ae 1066 peer->lock--;
1067
1068 if (peer->lock == 0) {
1069 peer_free(peer);
1070 return NULL;
1071 }
1072
1073 return peer;
200df115 1074}
794b37d5 1075/* BGP GR changes */
1076
1077int bgp_global_gr_init(struct bgp *bgp)
1078{
1079 if (BGP_DEBUG(graceful_restart, GRACEFUL_RESTART))
1080 zlog_debug("%s called ..", __func__);
1081
2ba1fe69 1082 int local_GLOBAL_GR_FSM[BGP_GLOBAL_GR_MODE][BGP_GLOBAL_GR_EVENT_CMD] = {
794b37d5 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;
dc95985f 1120 bgp->present_zebra_gr_state = ZEBRA_GR_DISABLE;
794b37d5 1121
1122 return BGP_GR_SUCCESS;
1123}
1124
1125int bgp_peer_gr_init(struct peer *peer)
1126{
1127 if (BGP_DEBUG(graceful_restart, GRACEFUL_RESTART))
1128 zlog_debug("%s called ..", __func__);
1129
2ba1fe69 1130 struct bgp_peer_gr local_Peer_GR_FSM[BGP_PEER_GR_MODE]
1131 [BGP_PEER_GR_EVENT_CMD] = {
794b37d5 1132 {
1133 /* PEER_HELPER Mode */
1134 /* Event-> */ /* PEER_GR_CMD */ /* NO_PEER_GR_CMD */
1135 { PEER_GR, bgp_peer_gr_action }, {PEER_INVALID, NULL },
2ba1fe69 1136 /* Event-> */ /* PEER_DISABLE_CMD */ /* NO_PEER_DISABLE_CMD */
794b37d5 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 },
2ba1fe69 1147 /* Event-> */ /* PEER_DISABLE_CMD */ /* NO_PEER_DISABLE_CMD */
794b37d5 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 },
2ba1fe69 1156 /* Event-> */ /* PEER_DISABLE_CMD */ /* NO_PEER_DISABLE_CMD */
794b37d5 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 },
2ba1fe69 1166 /* Event-> */ /* PEER_DISABLE_CMD */ /* NO_PEER_DISABLE_CMD */
794b37d5 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 },
2ba1fe69 1175 /* Event-> */ /* PEER_DISABLE_CMD */ /* NO_PEER_DISABLE_CMD */
794b37d5 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}
1ff9a340 1188
200df115 1189/* Allocate new peer object, implicitely locked. */
d62a17ae 1190struct 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);
d62a17ae 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;
5d5393b9 1206 peer->v_connect = bgp->default_connect_retry;
d62a17ae 1207 peer->status = Idle;
1208 peer->ostatus = Idle;
1209 peer->cur_event = peer->last_event = peer->last_major_event = 0;
92375c91 1210 peer->bgp = bgp_lock(bgp);
d62a17ae 1211 peer = peer_lock(peer); /* initial reference */
d62a17ae 1212 peer->password = NULL;
1213
27c05d4d 1214 /* Set default flags. */
05c7a1cc 1215 FOREACH_AFI_SAFI (afi, safi) {
d8a9922d
DS		 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);
dcc68b5e 1228 peer->addpath_type[afi][safi] = BGP_ADDPATH_NONE;
05c7a1cc 1229 }
637315fc 1230
bd23c840
PR		 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
d62a17ae 1235 SET_FLAG(peer->sflags, PEER_STATUS_CAPABILITY_OPEN);
718e3744 1236
794b37d5 1237 /* Initialize per peer bgp GR FSM */
1238 bgp_peer_gr_init(peer);
1239
d62a17ae 1240 /* Create buffers. */
424ab01d 1241 peer->ibuf = stream_fifo_new();
d62a17ae 1242 peer->obuf = stream_fifo_new();
424ab01d 1243 pthread_mutex_init(&peer->io_mtx, NULL);
0a91ff55 1244
424ab01d 1245 /* We use a larger buffer for peer->obuf_work in the event that:
d62a17ae 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
09f6d019
QY		 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.
d62a17ae 1252 *
1253 * Having a buffer with BGP_MAX_PACKET_SIZE_OVERFLOW allows us to avoid
09f6d019
QY		 1254 * bounds checking for every single attribute as we construct an
1255 * UPDATE.
d62a17ae 1256 */
424ab01d 1257 peer->obuf_work =
d62a17ae 1258 stream_new(BGP_MAX_PACKET_SIZE + BGP_MAX_PACKET_SIZE_OVERFLOW);
74ffbfe6
QY		 1259 peer->ibuf_work =
1260 ringbuf_new(BGP_MAX_PACKET_SIZE * BGP_READ_PACKET_MAX);
1261
d62a17ae 1262 peer->scratch = stream_new(BGP_MAX_PACKET_SIZE);
718e3744 1263
d62a17ae 1264 bgp_sync_init(peer);
718e3744 1265
d62a17ae 1266 /* Get service port number. */
1267 sp = getservbyname("bgp", "tcp");
1268 peer->port = (sp == NULL) ? BGP_PORT_DEFAULT : ntohs(sp->s_port);
718e3744 1269
d62a17ae 1270 QOBJ_REG(peer, peer);
1271 return peer;
718e3744 1272}
1273
1ff9a340
DS		 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 */
d62a17ae 1279void 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;
d62a17ae 1298
d7b3cda6 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
d62a17ae 1302 peer_dst->local_as = peer_src->local_as;
d62a17ae 1303 peer_dst->port = peer_src->port;
82417ac2 1304 (void)peer_sort(peer_dst);
d62a17ae 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
05c7a1cc
QY		 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];
dcc68b5e
MS		 1327 peer_dst->addpath_type[afi][safi] =
1328 peer_src->addpath_type[afi][safi];
05c7a1cc 1329 }
d62a17ae 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);
e1b36e13 1341 XFREE(MTYPE_PEER_UPDATE_SOURCE, peer_dst->update_if);
d62a17ae 1342 peer_dst->update_source =
1343 sockunion_dup(peer_src->update_source);
1344 } else if (peer_src->update_if) {
0a22ddfb 1345 XFREE(MTYPE_PEER_UPDATE_SOURCE, peer_dst->update_if);
d62a17ae 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) {
0a22ddfb 1355 XFREE(MTYPE_BGP_PEER_IFNAME, peer_dst->ifname);
d62a17ae 1356
1357 peer_dst->ifname =
1358 XSTRDUP(MTYPE_BGP_PEER_IFNAME, peer_src->ifname);
1359 }
1360}
1361
1362static 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;
d7c0a89a 1367 uint32_t addr;
d62a17ae 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);
8ffedcea 1385#ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN
d62a17ae 1386 peer->su.sin.sin_len =
1387 sizeof(struct sockaddr_in);
8ffedcea 1388#endif /* HAVE_STRUCT_SOCKADDR_IN_SIN_LEN */
d62a17ae 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);
8ffedcea 1399#ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN
d62a17ae 1400 peer->su.sin.sin_len =
1401 sizeof(struct sockaddr_in);
8ffedcea 1402#endif /* HAVE_STRUCT_SOCKADDR_IN_SIN_LEN */
d62a17ae 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
3dc339cd
DA		 1414static bool bgp_peer_conf_if_to_su_update_v6(struct peer *peer,
1415 struct interface *ifp)
d62a17ae 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));
a80beece 1425#ifdef SIN6_LEN
d62a17ae 1426 peer->su.sin6.sin6_len = sizeof(struct sockaddr_in6);
a80beece 1427#endif
d62a17ae 1428 peer->su.sin6.sin6_scope_id = ifp->ifindex;
3dc339cd 1429 return true;
d62a17ae 1430 }
8ffedcea 1431
3dc339cd 1432 return false;
89ca90fa 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 */
d62a17ae 1440void 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
d12b745c
DS		 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
d62a17ae 1455 prev_family = peer->su.sa.sa_family;
a36898e7 1456 if ((ifp = if_lookup_by_name(peer->conf_if, peer->bgp->vrf_id))) {
d62a17ae 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) {
a14810f4
PM		 1484 if (CHECK_FLAG(peer->flags, PEER_FLAG_PASSWORD)
1485 && prev_family == AF_UNSPEC)
d62a17ae 1486 bgp_md5_set(peer);
1487 } else {
a14810f4
PM		 1488 if (CHECK_FLAG(peer->flags, PEER_FLAG_PASSWORD)
1489 && prev_family != AF_UNSPEC)
d62a17ae 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
d12b745c
DS		 1495 /*
1496 * Since our su changed we need to del/add peer to the peerhash
1497 */
d62a17ae 1498 hash_get(peer->bgp->peerhash, peer, hash_alloc_intern);
a80beece
DS		 1499}
1500
318cac96
DW		 1501static void bgp_recalculate_afi_safi_bestpaths(struct bgp *bgp, afi_t afi,
1502 safi_t safi)
1503{
9bcb3eef 1504 struct bgp_dest *dest, *ndest;
67009e22 1505 struct bgp_table *table;
318cac96 1506
9bcb3eef
DS		 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);
67009e22 1510 if (table != NULL) {
318cac96
DW		 1511 /* Special handling for 2-level routing
1512 * tables. */
a4d82a8a 1513 if (safi == SAFI_MPLS_VPN || safi == SAFI_ENCAP
318cac96 1514 || safi == SAFI_EVPN) {
9bcb3eef
DS		 1515 for (ndest = bgp_table_top(table); ndest;
1516 ndest = bgp_route_next(ndest))
1517 bgp_process(bgp, ndest, afi, safi);
318cac96 1518 } else
9bcb3eef 1519 bgp_process(bgp, dest, afi, safi);
318cac96
DW		 1520 }
1521 }
1522}
1523
06370dac
DW		 1524/* Force a bestpath recalculation for all prefixes. This is used
1525 * when 'bgp bestpath' commands are entered.
1526 */
d62a17ae 1527void bgp_recalculate_all_bestpaths(struct bgp *bgp)
1528{
1529 afi_t afi;
1530 safi_t safi;
d62a17ae 1531
05c7a1cc
QY		 1532 FOREACH_AFI_SAFI (afi, safi) {
1533 bgp_recalculate_afi_safi_bestpaths(bgp, afi, safi);
d62a17ae 1534 }
06370dac
DW		 1535}
1536
19bd3dff
DS		 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 */
d62a17ae 1546struct 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);
19bd3dff
DS		 1558 if (su)
1559 peer->su = *su;
1560 else
1561 bgp_peer_conf_if_to_su_update(peer);
0a22ddfb 1562 XFREE(MTYPE_BGP_PEER_HOST, peer->host);
d62a17ae 1563 peer->host = XSTRDUP(MTYPE_BGP_PEER_HOST, conf_if);
1564 } else if (su) {
1565 peer->su = *su;
1566 sockunion2str(su, buf, SU_ADDRSTRLEN);
0a22ddfb 1567 XFREE(MTYPE_BGP_PEER_HOST, peer->host);
d62a17ae 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;
b90a8e13
PM		 1576 peer->v_routeadv = (peer_sort(peer) == BGP_PEER_IBGP)
1577 ? BGP_DEFAULT_IBGP_ROUTEADV
1578 : BGP_DEFAULT_EBGP_ROUTEADV;
d62a17ae 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
4961a5a2 1585 /* Adjust update-group coalesce timer heuristics for # peers. */
37a333fe 1586 if (bgp->heuristic_coalesce) {
14b8641a
QY		 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 }
4961a5a2 1592
d62a17ae 1593 active = peer_active(peer);
05912a17
DD		 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 }
d62a17ae 1600
1601 /* Last read and reset time set */
1602 peer->readtime = peer->resettime = bgp_clock();
1603
1604 /* Default TTL set. */
a0903cd2 1605 peer->ttl = (peer->sort == BGP_PEER_IBGP) ? MAXTTL : BGP_DEFAULT_TTL;
d62a17ae 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
f26845f9
QY		 1614 /* auto shutdown if configured */
1615 if (bgp->autoshutdown)
1616 peer_flag_set(peer, PEER_FLAG_SHUTDOWN);
d62a17ae 1617 /* Set up peer's events and timers. */
f26845f9 1618 else if (!active && peer_active(peer))
d62a17ae 1619 bgp_timer_set(peer);
1620
794b37d5 1621 bgp_peer_gr_flags_update(peer);
36235319 1622 BGP_GR_ROUTER_DETECT_AND_SEND_CAPABILITY_TO_ZEBRA(bgp, bgp->peer);
dc95985f 1623
d62a17ae 1624 return peer;
718e3744 1625}
1626
dd793e4a 1627/* Make accept BGP peer. This function is only called from the test code */
d62a17ae 1628struct peer *peer_create_accept(struct bgp *bgp)
eb821189 1629{
d62a17ae 1630 struct peer *peer;
eb821189 1631
d62a17ae 1632 peer = peer_new(bgp);
1ff9a340 1633
d62a17ae 1634 peer = peer_lock(peer); /* bgp peer list reference */
1635 listnode_add_sort(bgp->peer, peer);
eb821189 1636
d62a17ae 1637 return peer;
eb821189 1638}
1639
318cac96
DW		 1640/*
1641 * Return true if we have a peer configured to use this afi/safi
1642 */
1643int 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
718e3744 1659/* Change peer's AS number. */
d62a17ae 1660void peer_as_change(struct peer *peer, as_t as, int as_specified)
1661{
469cbb0f 1662 bgp_peer_sort_t origtype, newtype;
d62a17ae 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 }
469cbb0f 1673 origtype = peer_sort_lookup(peer);
d62a17ae 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
469cbb0f 1684 newtype = peer_sort(peer);
d62a17ae 1685 /* Advertisement-interval reset */
b90a8e13 1686 if (!CHECK_FLAG(peer->flags, PEER_FLAG_ROUTEADV)) {
469cbb0f 1687 peer->v_routeadv = (newtype == BGP_PEER_IBGP)
b90a8e13
PM		 1688 ? BGP_DEFAULT_IBGP_ROUTEADV
1689 : BGP_DEFAULT_EBGP_ROUTEADV;
d62a17ae 1690 }
b90a8e13 1691
d62a17ae 1692 /* TTL reset */
469cbb0f 1693 if (newtype == BGP_PEER_IBGP)
d62a17ae 1694 peer->ttl = MAXTTL;
469cbb0f 1695 else if (origtype == BGP_PEER_IBGP)
a0903cd2 1696 peer->ttl = BGP_DEFAULT_TTL;
d62a17ae 1697
1698 /* reflector-client reset */
469cbb0f 1699 if (newtype != BGP_PEER_IBGP) {
d62a17ae 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);
7c40bf39 1710 UNSET_FLAG(peer->af_flags[AFI_IP][SAFI_FLOWSPEC],
1711 PEER_FLAG_REFLECTOR_CLIENT);
d62a17ae 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);
7c40bf39 1722 UNSET_FLAG(peer->af_flags[AFI_IP6][SAFI_FLOWSPEC],
1723 PEER_FLAG_REFLECTOR_CLIENT);
d62a17ae 1724 UNSET_FLAG(peer->af_flags[AFI_L2VPN][SAFI_EVPN],
1725 PEER_FLAG_REFLECTOR_CLIENT);
1726 }
1727
1728 /* local-as reset */
469cbb0f 1729 if (newtype != BGP_PEER_EBGP) {
d62a17ae 1730 peer->change_local_as = 0;
a14810f4
PM		 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);
d62a17ae 1734 }
718e3744 1735}
1736
1737/* If peer does not exist, create new one. If peer already exists,
1738 set AS number to the peer. */
d62a17ae 1739int 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 }
718e3744 1756
d62a17ae 1757 /* When this peer is a member of peer-group. */
1758 if (peer->group) {
faa16034
DS		 1759 /* peer-group already has AS number/internal/external */
1760 if (peer->group->conf->as
1761 || peer->group->conf->as_type) {
d62a17ae 1762 /* Return peer group's AS number. */
1763 *as = peer->group->conf->as;
1764 return BGP_ERR_PEER_GROUP_MEMBER;
1765 }
faa16034
DS		 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))) {
d62a17ae 1776 *as = peer->as;
1777 return BGP_ERR_PEER_GROUP_PEER_TYPE_DIFFERENT;
1778 }
1779 } else {
faa16034
DS		 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))) {
d62a17ae 1785 *as = peer->as;
1786 return BGP_ERR_PEER_GROUP_PEER_TYPE_DIFFERENT;
1787 }
1788 }
1789 }
93406d87 1790
d62a17ae 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
892fedb6 1811 if (CHECK_FLAG(bgp->flags, BGP_FLAG_NO_DEFAULT_IPV4)
d62a17ae 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 }
718e3744 1819
d62a17ae 1820 return 0;
1821}
718e3744 1822
9790f44f
DS		 1823static 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;
4c391142 1829 uint32_t flags_tmp;
e7103a96
PM		 1830 uint32_t pflags_ovrd;
1831 uint8_t *pfilter_ovrd;
9790f44f 1832 struct peer *conf;
9790f44f
DS		 1833
1834 conf = group->conf;
e7103a96
PM		 1835 pflags_ovrd = peer->af_flags_override[afi][safi];
1836 pfilter_ovrd = &peer->filter_override[afi][safi][in];
9790f44f
DS		 1837
1838 /* peer af_flags apply */
4c391142
PM		 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]);
9790f44f
DS		 1848
1849 /* maximum-prefix */
e7103a96
PM		 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 }
9790f44f
DS		 1855
1856 /* allowas-in */
e7103a96
PM		 1857 if (!CHECK_FLAG(pflags_ovrd, PEER_FLAG_ALLOWAS_IN))
1858 PEER_ATTR_INHERIT(peer, group, allowas_in[afi][safi]);
9790f44f
DS		 1859
1860 /* weight */
e7103a96
PM		 1861 if (!CHECK_FLAG(pflags_ovrd, PEER_FLAG_WEIGHT))
1862 PEER_ATTR_INHERIT(peer, group, weight[afi][safi]);
9790f44f
DS		 1863
1864 /* default-originate route-map */
e7103a96
PM		 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);
9790f44f
DS		 1869 }
1870
1871 /* inbound filter apply */
e7103a96
PM		 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);
9790f44f
DS		 1878 }
1879
e7103a96
PM		 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);
9790f44f
DS		 1886 }
1887
e7103a96
PM		 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);
9790f44f
DS		 1894 }
1895
e7103a96
PM		 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);
9790f44f
DS		 1902 }
1903
1904 /* outbound filter apply */
e7103a96
PM		 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);
9790f44f
DS		 1911 }
1912
e7103a96
PM		 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);
9790f44f
DS		 1919 }
1920
e7103a96
PM		 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);
9790f44f 1942 }
dcc68b5e
MS		 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 }
9790f44f
DS		 1948}
1949
1950static int peer_activate_af(struct peer *peer, afi_t afi, safi_t safi)
d62a17ae 1951{
1952 int active;
9bf904cc 1953 struct peer *other;
718e3744 1954
d62a17ae 1955 if (CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
e50f7cfd 1956 flog_err(EC_BGP_PEER_GROUP, "%s was called for peer-group %s",
1c50c1c0 1957 __func__, peer->host);
d62a17ae 1958 return 1;
1959 }
3f9c7369 1960
d62a17ae 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
9790f44f 1977 if (peer->group)
a4d82a8a 1978 peer_group2peer_config_copy_af(peer->group, peer, afi, safi);
9790f44f 1979
d62a17ae 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 }
64c1a9b5
DS		 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 }
9bf904cc
DS		 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 }
d62a17ae 2021 }
04b6bdc0 2022
d62a17ae 2023 return 0;
2024}
9e08021c 2025
d62a17ae 2026/* Activate the peer or peer group for specified AFI and SAFI. */
2027int 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;
318cac96 2033 struct bgp *bgp;
d62a17ae 2034
2035 /* Nothing to do if we've already activated this peer */
2036 if (peer->afc[afi][safi])
2037 return ret;
2038
318cac96
DW		 2039 bgp = peer->bgp;
2040
d62a17ae 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)) {
9790f44f 2057 ret |= peer_activate_af(tmp_peer, afi, safi);
d62a17ae 2058 }
2059 } else {
9790f44f 2060 ret |= peer_activate_af(peer, afi, safi);
d62a17ae 2061 }
718e3744 2062
a4d82a8a
PZ		 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]) {
318cac96
DW		 2067
2068 if (BGP_DEBUG(zebra, ZEBRA))
4cb5e18b 2069 zlog_debug(
a4d82a8a 2070 "peer(s) are now active for labeled-unicast, allocate MPLS labels");
318cac96
DW		 2071
2072 bgp->allocate_mpls_labels[afi][SAFI_UNICAST] = 1;
2073 bgp_recalculate_afi_safi_bestpaths(bgp, afi, SAFI_UNICAST);
2074 }
2075
b98f7728
PG		 2076 if (safi == SAFI_FLOWSPEC) {
2077 /* connect to table manager */
6818e7e5 2078 bgp_zebra_init_tm_connect(bgp);
b98f7728 2079 }
d62a17ae 2080 return ret;
718e3744 2081}
6b0655a2 2082
3dc339cd
DA		 2083static bool non_peergroup_deactivate_af(struct peer *peer, afi_t afi,
2084 safi_t safi)
718e3744 2085{
d62a17ae 2086 if (CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
e50f7cfd 2087 flog_err(EC_BGP_PEER_GROUP, "%s was called for peer-group %s",
1c50c1c0 2088 __func__, peer->host);
3dc339cd 2089 return true;
d62a17ae 2090 }
718e3744 2091
d62a17ae 2092 /* Nothing to do if we've already deactivated this peer */
2093 if (!peer->afc[afi][safi])
3dc339cd 2094 return false;
718e3744 2095
d62a17ae 2096 /* De-activate the address family configuration. */
2097 peer->afc[afi][safi] = 0;
718e3744 2098
d62a17ae 2099 if (peer_af_delete(peer, afi, safi) != 0) {
e50f7cfd 2100 flog_err(EC_BGP_PEER_DELETE,
601837df
DS		 2101 "couldn't delete af structure for peer %s(%s, %s)",
2102 peer->host, afi2str(afi), safi2str(safi));
3dc339cd 2103 return true;
d62a17ae 2104 }
718e3744 2105
d62a17ae 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 }
718e3744 2128
3dc339cd 2129 return false;
d62a17ae 2130}
718e3744 2131
d62a17ae 2132int peer_deactivate(struct peer *peer, afi_t afi, safi_t safi)
718e3744 2133{
d62a17ae 2134 int ret = 0;
2135 struct peer_group *group;
2136 struct peer *tmp_peer;
2137 struct listnode *node, *nnode;
318cac96 2138 struct bgp *bgp;
718e3744 2139
d62a17ae 2140 /* Nothing to do if we've already de-activated this peer */
2141 if (!peer->afc[afi][safi])
2142 return ret;
718e3744 2143
d62a17ae 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;
718e3744 2149
d62a17ae 2150 if (peer_af_delete(peer, afi, safi) != 0) {
601837df
DS		 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));
d62a17ae 2155 }
0299c004 2156
d62a17ae 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 }
718e3744 2163
318cac96
DW		 2164 bgp = peer->bgp;
2165
a4d82a8a
PZ		 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)) {
318cac96
DW		 2171
2172 if (BGP_DEBUG(zebra, ZEBRA))
4cb5e18b 2173 zlog_debug(
a4d82a8a 2174 "peer(s) are no longer active for labeled-unicast, deallocate MPLS labels");
318cac96
DW		 2175
2176 bgp->allocate_mpls_labels[afi][SAFI_UNICAST] = 0;
2177 bgp_recalculate_afi_safi_bestpaths(bgp, afi, SAFI_UNICAST);
2178 }
d62a17ae 2179 return ret;
2180}
718e3744 2181
d7b3cda6 2182void peer_nsf_stop(struct peer *peer)
718e3744 2183{
d62a17ae 2184 afi_t afi;
2185 safi_t safi;
718e3744 2186
d62a17ae 2187 UNSET_FLAG(peer->sflags, PEER_STATUS_NSF_WAIT);
2188 UNSET_FLAG(peer->sflags, PEER_STATUS_NSF_MODE);
718e3744 2189
d62a17ae 2190 for (afi = AFI_IP; afi < AFI_MAX; afi++)
a08ca0a7 2191 for (safi = SAFI_UNICAST; safi <= SAFI_MPLS_VPN; safi++)
d62a17ae 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);
1ff9a340 2199 }
d62a17ae 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}
718e3744 2209
d62a17ae 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 */
2221int 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;
f14e6fdb 2230
d62a17ae 2231 assert(peer->status != Deleted);
718e3744 2232
d62a17ae 2233 bgp = peer->bgp;
2234 accept_peer = CHECK_FLAG(peer->sflags, PEER_STATUS_ACCEPT_PEER);
080b97f2 2235
0a6469e5 2236 bgp_keepalives_off(peer);
424ab01d
QY		 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));
0a6469e5 2241 assert(!CHECK_FLAG(peer->thread_flags, PEER_THREAD_KEEPALIVES_ON));
424ab01d 2242
d62a17ae 2243 if (CHECK_FLAG(peer->sflags, PEER_STATUS_NSF_WAIT))
2244 peer_nsf_stop(peer);
718e3744 2245
d62a17ae 2246 SET_FLAG(peer->flags, PEER_FLAG_DELETE);
718e3744 2247
e8ba5293
PG		 2248 bgp_bfd_deregister_peer(peer);
2249
d62a17ae 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);
718e3744 2255
d62a17ae 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 }
718e3744 2263
d62a17ae 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 }
718e3744 2276
d62a17ae 2277 UNSET_FLAG(peer->sflags, PEER_STATUS_ACCEPT_PEER);
2278 bgp_fsm_change_status(peer, Deleted);
718e3744 2279
d62a17ae 2280 /* Remove from NHT */
2281 if (CHECK_FLAG(peer->flags, PEER_FLAG_CONFIG_NODE))
2282 bgp_unlink_nexthop_by_peer(peer);
1ff9a340 2283
d62a17ae 2284 /* Password configuration */
a14810f4 2285 if (CHECK_FLAG(peer->flags, PEER_FLAG_PASSWORD)) {
d62a17ae 2286 XFREE(MTYPE_PEER_PASSWORD, peer->password);
1ff9a340 2287
d62a17ae 2288 if (!accept_peer && !BGP_PEER_SU_UNSPEC(peer)
2289 && !CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP))
2290 bgp_md5_unset(peer);
1ff9a340 2291 }
718e3744 2292
d62a17ae 2293 bgp_timer_set(peer); /* stops all timers for Deleted */
718e3744 2294
d62a17ae 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 }
718e3744 2302
d62a17ae 2303 /* Buffers. */
2304 if (peer->ibuf) {
424ab01d 2305 stream_fifo_free(peer->ibuf);
d62a17ae 2306 peer->ibuf = NULL;
2307 }
f14e6fdb 2308
d62a17ae 2309 if (peer->obuf) {
2310 stream_fifo_free(peer->obuf);
2311 peer->obuf = NULL;
2312 }
f14e6fdb 2313
424ab01d 2314 if (peer->ibuf_work) {
74ffbfe6 2315 ringbuf_del(peer->ibuf_work);
424ab01d
QY		 2316 peer->ibuf_work = NULL;
2317 }
2318
2319 if (peer->obuf_work) {
2320 stream_free(peer->obuf_work);
2321 peer->obuf_work = NULL;
d62a17ae 2322 }
f14e6fdb 2323
d62a17ae 2324 if (peer->scratch) {
2325 stream_free(peer->scratch);
2326 peer->scratch = NULL;
2327 }
f14e6fdb 2328
d62a17ae 2329 /* Local and remote addresses. */
2330 if (peer->su_local) {
2331 sockunion_free(peer->su_local);
2332 peer->su_local = NULL;
2333 }
f14e6fdb 2334
d62a17ae 2335 if (peer->su_remote) {
2336 sockunion_free(peer->su_remote);
2337 peer->su_remote = NULL;
2338 }
f14e6fdb 2339
d62a17ae 2340 /* Free filter related memory. */
05c7a1cc
QY		 2341 FOREACH_AFI_SAFI (afi, safi) {
2342 filter = &peer->filter[afi][safi];
d62a17ae 2343
05c7a1cc 2344 for (i = FILTER_IN; i < FILTER_MAX; i++) {
e1b36e13
QY		 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);
05c7a1cc 2348 }
d62a17ae 2349
05c7a1cc 2350 for (i = RMAP_IN; i < RMAP_MAX; i++) {
e1b36e13 2351 XFREE(MTYPE_BGP_FILTER_NAME, filter->map[i].name);
05c7a1cc
QY		 2352 }
2353
e1b36e13
QY		 2354 XFREE(MTYPE_BGP_FILTER_NAME, filter->usmap.name);
2355 XFREE(MTYPE_ROUTE_MAP_NAME, peer->default_rmap[afi][safi].name);
05c7a1cc
QY		 2356 }
2357
a2addae8
RW		 2358 FOREACH_AFI_SAFI (afi, safi)
2359 peer_af_delete(peer, afi, safi);
f14e6fdb 2360
e1b36e13
QY		 2361 XFREE(MTYPE_BGP_PEER_HOST, peer->hostname);
2362 XFREE(MTYPE_BGP_PEER_HOST, peer->domainname);
f14e6fdb 2363
d62a17ae 2364 peer_unlock(peer); /* initial reference */
f14e6fdb 2365
d62a17ae 2366 return 0;
fe7d2a48
DS		 2367}
2368
d62a17ae 2369static int peer_group_cmp(struct peer_group *g1, struct peer_group *g2)
2370{
2371 return strcmp(g1->name, g2->name);
6aeb9e78
DS		 2372}
2373
d62a17ae 2374/* Peer group cofiguration. */
2375static struct peer_group *peer_group_new(void)
718e3744 2376{
9f5dc319 2377 return XCALLOC(MTYPE_PEER_GROUP, sizeof(struct peer_group));
718e3744 2378}
2379
d62a17ae 2380static void peer_group_free(struct peer_group *group)
718e3744 2381{
d62a17ae 2382 XFREE(MTYPE_PEER_GROUP, group);
718e3744 2383}
2384
d62a17ae 2385struct peer_group *peer_group_lookup(struct bgp *bgp, const char *name)
718e3744 2386{
d62a17ae 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
2397struct 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;
0a22ddfb 2408 XFREE(MTYPE_PEER_GROUP_HOST, group->name);
d62a17ae 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);
892fedb6 2414 if (!CHECK_FLAG(bgp->flags, BGP_FLAG_NO_DEFAULT_IPV4))
d62a17ae 2415 group->conf->afc[AFI_IP][SAFI_UNICAST] = 1;
0a22ddfb 2416 XFREE(MTYPE_BGP_PEER_HOST, group->conf->host);
d62a17ae 2417 group->conf->host = XSTRDUP(MTYPE_BGP_PEER_HOST, name);
2418 group->conf->group = group;
2419 group->conf->as = 0;
a0903cd2 2420 group->conf->ttl = BGP_DEFAULT_TTL;
e2521429 2421 group->conf->gtsm_hops = BGP_GTSM_HOPS_DISABLED;
d62a17ae 2422 group->conf->v_routeadv = BGP_DEFAULT_EBGP_ROUTEADV;
d62a17ae 2423 SET_FLAG(group->conf->sflags, PEER_STATUS_GROUP);
2424 listnode_add_sort(bgp->group, group);
718e3744 2425
d62a17ae 2426 return group;
718e3744 2427}
2428
d62a17ae 2429static void peer_group2peer_config_copy(struct peer_group *group,
2430 struct peer *peer)
ad4cbda1 2431{
4c391142 2432 uint32_t flags_tmp;
d62a17ae 2433 struct peer *conf;
ad4cbda1 2434
d62a17ae 2435 conf = group->conf;
ad4cbda1 2436
d62a17ae 2437 /* remote-as */
2438 if (conf->as)
2439 peer->as = conf->as;
718e3744 2440
a14810f4
PM		 2441 /* local-as */
2442 if (!CHECK_FLAG(peer->flags_override, PEER_FLAG_LOCAL_AS))
d62a17ae 2443 peer->change_local_as = conf->change_local_as;
1758dbaa 2444
a0903cd2
DA		 2445 /* If peer-group has configured TTL then override it */
2446 if (conf->ttl != BGP_DEFAULT_TTL)
2447 peer->ttl = conf->ttl;
518f0eb1 2448
d62a17ae 2449 /* GTSM hops */
2450 peer->gtsm_hops = conf->gtsm_hops;
ad12dde6 2451
4c391142
PM		 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);
ad4cbda1 2460
d62a17ae 2461 /* peer timers apply */
b90a8e13
PM		 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 }
6aeb9e78 2466
b90a8e13
PM		 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
5d5393b9 2472 peer->v_connect = peer->bgp->default_connect_retry;
b90a8e13
PM		 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 }
718e3744 2485
b3a3290e
DS		 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
d62a17ae 2491 /* password apply */
a14810f4
PM		 2492 if (!CHECK_FLAG(peer->flags_override, PEER_FLAG_PASSWORD))
2493 PEER_STR_ATTR_INHERIT(peer, group, password,
2494 MTYPE_PEER_PASSWORD);
718e3744 2495
d62a17ae 2496 if (!BGP_PEER_SU_UNSPEC(peer))
2497 bgp_md5_set(peer);
d4a7a753 2498
d62a17ae 2499 /* update-source apply */
a14810f4
PM		 2500 if (!CHECK_FLAG(peer->flags_override, PEER_FLAG_UPDATE_SOURCE)) {
2501 if (conf->update_source) {
d62a17ae 2502 XFREE(MTYPE_PEER_UPDATE_SOURCE, peer->update_if);
a14810f4
PM		 2503 PEER_SU_ATTR_INHERIT(peer, group, update_source);
2504 } else if (conf->update_if) {
d62a17ae 2505 sockunion_free(peer->update_source);
a14810f4
PM		 2506 PEER_STR_ATTR_INHERIT(peer, group, update_if,
2507 MTYPE_PEER_UPDATE_SOURCE);
d62a17ae 2508 }
d62a17ae 2509 }
cd92e548 2510
0c0b85b5
NT		 2511 /* Update GR flags for the peer. */
2512 bgp_peer_gr_flags_update(peer);
2513
d62a17ae 2514 bgp_bfd_peer_group2peer_copy(conf, peer);
ad4cbda1 2515}
718e3744 2516
d62a17ae 2517/* Peer group's remote AS configuration. */
2518int peer_group_remote_as(struct bgp *bgp, const char *group_name, as_t *as,
2519 int as_type)
f14e6fdb 2520{
d62a17ae 2521 struct peer_group *group;
2522 struct peer *peer;
2523 struct listnode *node, *nnode;
f14e6fdb 2524
d62a17ae 2525 group = peer_group_lookup(bgp, group_name);
2526 if (!group)
2527 return -1;
f14e6fdb 2528
d62a17ae 2529 if ((as_type == group->conf->as_type) && (group->conf->as == *as))
2530 return 0;
f14e6fdb 2531
f14e6fdb 2532
d62a17ae 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);
f14e6fdb 2536
d62a17ae 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 }
f14e6fdb 2542
d62a17ae 2543 return 0;
f14e6fdb
DS		 2544}
2545
3dc339cd 2546void peer_notify_unconfig(struct peer *peer)
4e2786df
DA		 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);
4e2786df
DA		 2551}
2552
3dc339cd 2553void peer_group_notify_unconfig(struct peer_group *group)
4e2786df
DA		 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 }
4e2786df
DA		 2566}
2567
d62a17ae 2568int peer_group_delete(struct peer_group *group)
f14e6fdb 2569{
d62a17ae 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;
f14e6fdb 2576
d62a17ae 2577 bgp = group->bgp;
f14e6fdb 2578
d62a17ae 2579 for (ALL_LIST_ELEMENTS(group->peer, node, nnode, peer)) {
2580 other = peer->doppelganger;
b3a3290e
DS		 2581
2582 if (CHECK_FLAG(peer->flags, PEER_FLAG_CAPABILITY_ENHE))
2583 bgp_zebra_terminate_radv(bgp, peer);
2584
d62a17ae 2585 peer_delete(peer);
2586 if (other && other->status != Deleted) {
2587 other->group = NULL;
2588 peer_delete(other);
2589 }
2590 }
6a154c88 2591 list_delete(&group->peer);
f14e6fdb 2592
d62a17ae 2593 for (afi = AFI_IP; afi < AFI_MAX; afi++) {
2594 for (ALL_LIST_ELEMENTS(group->listen_range[afi], node, nnode,
2595 prefix)) {
63265b5c 2596 prefix_free(&prefix);
d62a17ae 2597 }
6a154c88 2598 list_delete(&group->listen_range[afi]);
d62a17ae 2599 }
f14e6fdb 2600
d62a17ae 2601 XFREE(MTYPE_PEER_GROUP_HOST, group->name);
2602 group->name = NULL;
0299c004 2603
d62a17ae 2604 bfd_info_free(&(group->conf->bfd_info));
f14e6fdb 2605
d62a17ae 2606 group->conf->group = NULL;
2607 peer_delete(group->conf);
f14e6fdb 2608
d62a17ae 2609 /* Delete from all peer_group list. */
2610 listnode_delete(bgp->group, group);
f14e6fdb 2611
d62a17ae 2612 peer_group_free(group);
f14e6fdb 2613
d62a17ae 2614 return 0;
2615}
f14e6fdb 2616
d62a17ae 2617int peer_group_remote_as_delete(struct peer_group *group)
2618{
2619 struct peer *peer, *other;
2620 struct listnode *node, *nnode;
f14e6fdb 2621
d62a17ae 2622 if ((group->conf->as_type == AS_UNSPECIFIED)
2623 || ((!group->conf->as) && (group->conf->as_type == AS_SPECIFIED)))
2624 return 0;
f14e6fdb 2625
d62a17ae 2626 for (ALL_LIST_ELEMENTS(group->peer, node, nnode, peer)) {
2627 other = peer->doppelganger;
f14e6fdb 2628
b3a3290e
DS		 2629 if (CHECK_FLAG(peer->flags, PEER_FLAG_CAPABILITY_ENHE))
2630 bgp_zebra_terminate_radv(peer->bgp, peer);
2631
d62a17ae 2632 peer_delete(peer);
f14e6fdb 2633
d62a17ae 2634 if (other && other->status != Deleted) {
2635 other->group = NULL;
2636 peer_delete(other);
2637 }
2638 }
2639 list_delete_all_node(group->peer);
f14e6fdb 2640
d62a17ae 2641 group->conf->as = 0;
2642 group->conf->as_type = AS_UNSPECIFIED;
f14e6fdb 2643
d62a17ae 2644 return 0;
f14e6fdb 2645}
d62a17ae 2646
2647int peer_group_listen_range_add(struct peer_group *group, struct prefix *range)
f14e6fdb 2648{
d62a17ae 2649 struct prefix *prefix;
2650 struct listnode *node, *nnode;
2651 afi_t afi;
f14e6fdb 2652
d62a17ae 2653 afi = family2afi(range->family);
f14e6fdb 2654
d62a17ae 2655 /* Group needs remote AS configured. */
2656 if (group->conf->as_type == AS_UNSPECIFIED)
2657 return BGP_ERR_PEER_GROUP_NO_REMOTE_AS;
718e3744 2658
d62a17ae 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);
9e7d9a61
QY		 2668
2669 /* Update passwords for new ranges */
2670 if (group->conf->password)
2671 bgp_md5_set_prefix(prefix, group->conf->password);
2672
d62a17ae 2673 return 0;
718e3744 2674}
6b0655a2 2675
d62a17ae 2676int peer_group_listen_range_del(struct peer_group *group, struct prefix *range)
718e3744 2677{
d62a17ae 2678 struct prefix *prefix, prefix2;
2679 struct listnode *node, *nnode;
2680 struct peer *peer;
2681 afi_t afi;
2682 char buf[PREFIX2STR_BUFFER];
718e3744 2683
d62a17ae 2684 afi = family2afi(range->family);
1ff9a340 2685
d62a17ae 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;
1ff9a340 2690 }
718e3744 2691
d62a17ae 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(
3efd0893 2707 "Deleting dynamic neighbor %s group %s upon delete of listen range %s",
d62a17ae 2708 peer->host, group->name, buf);
2709 peer_delete(peer);
2710 }
2711 }
718e3744 2712
d62a17ae 2713 /* Get rid of the listen range */
2714 listnode_delete(group->listen_range[afi], prefix);
718e3744 2715
9e7d9a61
QY		 2716 /* Remove passwords for deleted ranges */
2717 if (group->conf->password)
2718 bgp_md5_unset_prefix(prefix);
2719
d62a17ae 2720 return 0;
2721}
e0701b79 2722
d62a17ae 2723/* Bind specified peer to peer group. */
2724int 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;
469cbb0f 2730 bgp_peer_sort_t ptype, gtype;
d62a17ae 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) {
ed9fb826 2738 /* When the peer already belongs to a peer-group, check the
d62a17ae 2739 * consistency. */
ed9fb826
DW		 2740 if (peer_group_active(peer)) {
2741
2742 /* The peer is already bound to the peer-group,
d8a079e8
DW		 2743 * nothing to do
2744 */
ed9fb826
DW		 2745 if (strcmp(peer->group->name, group->name) == 0)
2746 return 0;
2747 else
2748 return BGP_ERR_PEER_GROUP_CANT_CHANGE;
2749 }
d62a17ae 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;
faa16034 2756 peer->sort = group->conf->sort;
d62a17ae 2757 }
718e3744 2758
469cbb0f
DS		 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)) {
d62a17ae 2763 if (as)
2764 *as = peer->as;
2765 return BGP_ERR_PEER_GROUP_PEER_TYPE_DIFFERENT;
2766 }
718e3744 2767
469cbb0f 2768 if (gtype == BGP_PEER_INTERNAL)
d62a17ae 2769 first_member = 1;
2770 }
718e3744 2771
d62a17ae 2772 peer_group2peer_config_copy(group, peer);
2773
05c7a1cc
QY		 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);
a4d82a8a 2785 }
d62a17ae 2786
2787 if (peer->group) {
2788 assert(group && peer->group == group);
2789 } else {
0866cdaf
A		 2790 listnode_delete(bgp->peer, peer);
2791
d62a17ae 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 }
718e3744 2798
d62a17ae 2799 if (first_member) {
469cbb0f 2800 gtype = peer_sort(group->conf);
d62a17ae 2801 /* Advertisement-interval reset */
b90a8e13
PM		 2802 if (!CHECK_FLAG(group->conf->flags,
2803 PEER_FLAG_ROUTEADV)) {
2804 group->conf->v_routeadv =
469cbb0f 2805 (gtype == BGP_PEER_IBGP)
b90a8e13
PM		 2806 ? BGP_DEFAULT_IBGP_ROUTEADV
2807 : BGP_DEFAULT_EBGP_ROUTEADV;
d62a17ae 2808 }
2809
2810 /* ebgp-multihop reset */
469cbb0f 2811 if (gtype == BGP_PEER_IBGP)
d62a17ae 2812 group->conf->ttl = MAXTTL;
2813
2814 /* local-as reset */
469cbb0f 2815 if (gtype != BGP_PEER_EBGP) {
d62a17ae 2816 group->conf->change_local_as = 0;
a14810f4
PM		 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);
d62a17ae 2823 }
2824 }
718e3744 2825
d62a17ae 2826 SET_FLAG(peer->flags, PEER_FLAG_CONFIG_NODE);
718e3744 2827
d62a17ae 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 }
718e3744 2836
d62a17ae 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 }
718e3744 2843
d62a17ae 2844 peer = peer_create(su, NULL, bgp, bgp->as, group->conf->as,
2845 group->conf->as_type, 0, 0, group);
718e3744 2846
d62a17ae 2847 peer = peer_lock(peer); /* group->peer list reference */
2848 listnode_add(group->peer, peer);
718e3744 2849
d62a17ae 2850 peer_group2peer_config_copy(group, peer);
a4ed4829 2851
d62a17ae 2852 /* If the peer-group is active for this afi/safi then activate
2853 * for this peer */
05c7a1cc
QY		 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 }
718e3744 2863
d62a17ae 2864 SET_FLAG(peer->flags, PEER_FLAG_CONFIG_NODE);
718e3744 2865
d62a17ae 2866 /* Set up peer's events and timers. */
2867 if (peer_active(peer))
2868 bgp_timer_set(peer);
2869 }
718e3744 2870
d62a17ae 2871 return 0;
718e3744 2872}
2873
d62a17ae 2874static int bgp_startup_timer_expire(struct thread *thread)
2875{
2876 struct bgp *bgp;
718e3744 2877
d62a17ae 2878 bgp = THREAD_ARG(thread);
2879 bgp->t_startup = NULL;
718e3744 2880
d62a17ae 2881 return 0;
2882}
e0701b79 2883
829e590b
DS		 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 */
2889static void bgp_vrf_string_name_delete(void *data)
2890{
2891 char *vname = data;
2892
2893 XFREE(MTYPE_TMP, vname);
2894}
2895
d62a17ae 2896/* BGP instance creation by `router bgp' commands. */
2897static struct bgp *bgp_create(as_t *as, const char *name,
2898 enum bgp_instance_type inst_type)
2899{
0291c246
MK		 2900 struct bgp *bgp;
2901 afi_t afi;
2902 safi_t safi;
d62a17ae 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);
718e3744 2916 }
adbac85e 2917
e2f3a930
T		 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
d62a17ae 2924 bgp_lock(bgp);
9df5ac49 2925 bgp->heuristic_coalesce = true;
d62a17ae 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);
0a22ddfb 2930 XFREE(MTYPE_BGP_PEER_HOST, bgp->peer_self->host);
d62a17ae 2931 bgp->peer_self->host =
2932 XSTRDUP(MTYPE_BGP_PEER_HOST, "Static announcement");
e1b36e13 2933 XFREE(MTYPE_BGP_PEER_HOST, bgp->peer_self->hostname);
6b3ee3a0 2934 if (cmd_hostname_get())
60466a63
QY		 2935 bgp->peer_self->hostname =
2936 XSTRDUP(MTYPE_BGP_PEER_HOST, cmd_hostname_get());
d77114b7 2937
e1b36e13 2938 XFREE(MTYPE_BGP_PEER_HOST, bgp->peer_self->domainname);
6b3ee3a0 2939 if (cmd_domainname_get())
60466a63
QY		 2940 bgp->peer_self->domainname =
2941 XSTRDUP(MTYPE_BGP_PEER_HOST, cmd_domainname_get());
d62a17ae 2942 bgp->peer = list_new();
2943 bgp->peer->cmp = (int (*)(void *, void *))peer_cmp;
a4d82a8a 2944 bgp->peerhash = hash_create(peer_hash_key_make, peer_hash_same,
3f65c5b1 2945 "BGP Peer Hash");
40520c36 2946 bgp->peerhash->max_size = BGP_PEER_MAX_HASH_SIZE;
d62a17ae 2947
2948 bgp->group = list_new();
2949 bgp->group->cmp = (int (*)(void *, void *))peer_group_cmp;
2950
05c7a1cc 2951 FOREACH_AFI_SAFI (afi, safi) {
960035b2
PZ		 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);
05c7a1cc
QY		 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);
cfd47646 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();
05c7a1cc 2967 }
d62a17ae 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;
5d5393b9 2973 bgp_timers_unset(bgp);
d62a17ae 2974 bgp->restart_time = BGP_DEFAULT_RESTART_TIME;
2975 bgp->stalepath_time = BGP_DEFAULT_STALEPATH_TIME;
cfd47646 2976 bgp->select_defer_time = BGP_DEFAULT_SELECT_DEFERRAL_TIME;
dc95985f 2977 bgp->rib_stale_time = BGP_DEFAULT_RIB_STALE_TIME;
d62a17ae 2978 bgp->dynamic_neighbors_limit = BGP_DYNAMIC_NEIGHBORS_LIMIT_DEFAULT;
2979 bgp->dynamic_neighbors_count = 0;
b1875e65 2980 bgp->lb_ref_bw = BGP_LINK_BW_REF_BW;
f7e1c681 2981 bgp->lb_handling = BGP_LINK_BW_ECMP;
7f972cd8 2982 bgp->reject_as_sets = false;
dcc68b5e 2983 bgp_addpath_init_bgp_data(&bgp->tx_addpath);
d62a17ae 2984
2985 bgp->as = *as;
2986
49e5a4a0 2987#ifdef ENABLE_BGP_VNC
d62a17ae 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 */
adbac85e 2994
ddb5b488 2995 for (afi = AFI_IP; afi < AFI_MAX; afi++) {
e70e9f8e
PZ		 2996 bgp->vpn_policy[afi].bgp = bgp;
2997 bgp->vpn_policy[afi].afi = afi;
ddb5b488
PZ		 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;
12a844a5
DS		 3001
3002 bgp->vpn_policy[afi].import_vrf = list_new();
829e590b
DS		 3003 bgp->vpn_policy[afi].import_vrf->del =
3004 bgp_vrf_string_name_delete;
12a844a5 3005 bgp->vpn_policy[afi].export_vrf = list_new();
829e590b
DS		 3006 bgp->vpn_policy[afi].export_vrf->del =
3007 bgp_vrf_string_name_delete;
ddb5b488 3008 }
dc95985f 3009 if (name)
d62a17ae 3010 bgp->name = XSTRDUP(MTYPE_BGP, name);
dc95985f 3011
3012 thread_add_timer(bm->master, bgp_startup_timer_expire, bgp,
36235319 3013 bgp->restart_time, &bgp->t_startup);
06370dac 3014
3572fb26
PZ		 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
555e09d4
QY		 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);
d62a17ae 3041 bgp->coalesce_time = BGP_DEFAULT_SUBGROUP_COALESCE_TIME;
adbac85e 3042
d62a17ae 3043 QOBJ_REG(bgp, bgp);
adbac85e 3044
d62a17ae 3045 update_bgp_group_init(bgp);
92708db6 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
85c8d83b
CS		 3050 bgp->evpn_info = XCALLOC(MTYPE_BGP_EVPN_INFO,
3051 sizeof(struct bgp_evpn_info));
3052
d62a17ae 3053 bgp_evpn_init(bgp);
f3d32faa 3054 bgp_pbr_init(bgp);
794b37d5 3055
3056 /*initilize global GR FSM */
3057 bgp_global_gr_init(bgp);
d62a17ae 3058 return bgp;
718e3744 3059}
3060
d62a17ae 3061/* Return the "default VRF" instance of BGP. */
3062struct bgp *bgp_get_default(void)
718e3744 3063{
d62a17ae 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;
718e3744 3071}
3072
d62a17ae 3073/* Lookup BGP entry. */
3074struct bgp *bgp_lookup(as_t as, const char *name)
718e3744 3075{
d62a17ae 3076 struct bgp *bgp;
3077 struct listnode *node, *nnode;
6b0655a2 3078
d62a17ae 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}
73d70fa6 3086
d62a17ae 3087/* Lookup BGP structure by view name. */
3088struct bgp *bgp_lookup_by_name(const char *name)
73d70fa6 3089{
d62a17ae 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;
73d70fa6
DL		 3098}
3099
d62a17ae 3100/* Lookup BGP instance based on VRF id. */
3101/* Note: Only to be used for incoming messages from Zebra. */
3102struct bgp *bgp_lookup_by_vrf_id(vrf_id_t vrf_id)
73d70fa6 3103{
d62a17ae 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;
73d70fa6
DL		 3111}
3112
e2f3a930
T		 3113/* Sets the BGP instance where EVPN is enabled */
3114void 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 */
3131struct bgp *bgp_get_evpn(void)
3132{
3133 return bm->bgp_evpn;
3134}
3135
e5619c28
PG		 3136/* handle socket creation or deletion, if necessary
3137 * this is called for all new BGP instances
3138 */
996c9314
LB		 3139int bgp_handle_socket(struct bgp *bgp, struct vrf *vrf, vrf_id_t old_vrf_id,
3140 bool create)
e5619c28
PG		 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;
3ad00234 3147 if (bgp->inst_type == BGP_INSTANCE_TYPE_VRF) {
e5619c28
PG		 3148 /*
3149 * suppress vrf socket
3150 */
a8f58eb6 3151 if (!create) {
3ad00234
LB		 3152 bgp_close_vrf_socket(bgp);
3153 return 0;
e5619c28 3154 }
3ad00234
LB		 3155 if (vrf == NULL)
3156 return BGP_ERR_INVALID_VALUE;
e5619c28
PG		 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;
3ad00234
LB		 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);
e5619c28
PG		 3177}
3178
d62a17ae 3179/* Called from VTY commands. */
3180int bgp_get(struct bgp **bgp_val, as_t *as, const char *name,
3181 enum bgp_instance_type inst_type)
3182{
3183 struct bgp *bgp;
e5619c28 3184 struct vrf *vrf = NULL;
d62a17ae 3185
3186 /* Multiple instance check. */
8fbb4853
DS		 3187 if (name)
3188 bgp = bgp_lookup_by_name(name);
3189 else
d62a17ae 3190 bgp = bgp_get_default();
3191
8fbb4853
DS		 3192 /* Already exists. */
3193 if (bgp) {
3194 if (bgp->as != *as) {
3195 *as = bgp->as;
3196 return BGP_ERR_INSTANCE_MISMATCH;
d62a17ae 3197 }
8fbb4853
DS		 3198 if (bgp->inst_type != inst_type)
3199 return BGP_ERR_INSTANCE_MISMATCH;
3200 *bgp_val = bgp;
d5568431 3201 return BGP_SUCCESS;
d62a17ae 3202 }
73d70fa6 3203
d62a17ae 3204 bgp = bgp_create(as, name, inst_type);
0b014ea6
PG		 3205 if (bgp_option_check(BGP_OPT_NO_ZEBRA) && name)
3206 bgp->vrf_id = vrf_generate_id();
2951a7a4 3207 bgp_router_id_set(bgp, &bgp->router_id_zebra, true);
d62a17ae 3208 bgp_address_init(bgp);
db0e1937 3209 bgp_tip_hash_init(bgp);
d62a17ae 3210 bgp_scan_init(bgp);
3211 *bgp_val = bgp;
eb821189 3212
d62a17ae 3213 bgp->t_rmap_def_originate_eval = NULL;
e5cc509c 3214
d62a17ae 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) {
d62a17ae 3218 vrf = bgp_vrf_lookup_by_instance_type(bgp);
3219 if (vrf)
3220 bgp_vrf_link(bgp, vrf);
3221 }
e5619c28
PG		 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);
718e3744 3227
bb4ef1ae
DS		 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",
15569c58 3231 __func__, name);
d62a17ae 3232 bgp_zebra_instance_register(bgp);
bb4ef1ae 3233 }
718e3744 3234
5d5393b9 3235 return BGP_CREATED;
718e3744 3236}
6b0655a2 3237
d62a17ae 3238/*
3239 * Make BGP instance "up". Applies only to VRFs (non-default) and
3240 * implies the VRF has been learnt from Zebra.
3241 */
3242void bgp_instance_up(struct bgp *bgp)
718e3744 3243{
d62a17ae 3244 struct peer *peer;
3245 struct listnode *node, *next;
718e3744 3246
d62a17ae 3247 /* Register with zebra. */
3248 bgp_zebra_instance_register(bgp);
718e3744 3249
d62a17ae 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);
718e3744 3254 }
3255
d62a17ae 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 */
3264void 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? */
718e3744 3275 }
3276
d62a17ae 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 }
718e3744 3285
d62a17ae 3286 /* Purge network and redistributed routes. */
3287 bgp_purge_static_redist_routes(bgp);
ee7ca6c0 3288
3289 /* Cleanup registered nexthops (flags) */
3290 bgp_cleanup_nexthops(bgp);
718e3744 3291}
3292
d62a17ae 3293/* Delete BGP instance. */
3294int 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;
cfd47646 3301 safi_t safi;
d62a17ae 3302 int i;
cfd47646 3303 struct graceful_restart_info *gr_info;
d62a17ae 3304
bf383464 3305 assert(bgp);
2b9bcf30
DL		 3306
3307 hook_call(bgp_inst_delete, bgp);
3308
d62a17ae 3309 THREAD_OFF(bgp->t_startup);
c969b2ed
DS		 3310 THREAD_OFF(bgp->t_maxmed_onstartup);
3311 THREAD_OFF(bgp->t_update_delay);
3312 THREAD_OFF(bgp->t_establish_wait);
d62a17ae 3313
9f822fa2 3314 /* Set flag indicating bgp instance delete in progress */
892fedb6 3315 SET_FLAG(bgp->flags, BGP_FLAG_DELETE_IN_PROGRESS);
9f822fa2 3316
cfd47646 3317 /* Delete the graceful restart info */
3318 FOREACH_AFI_SAFI (afi, safi) {
3319 gr_info = &bgp->gr_info[afi][safi];
13909c4f
DS		 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);
cfd47646 3327 }
3328
d62a17ae 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);
718e3744 3338 }
3339
10ebe1ab
MK		 3340 /* unmap from RT list */
3341 bgp_evpn_vrf_delete(bgp);
3342
dfd17258
PG		 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
d62a17ae 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? */
718e3744 3352 }
3353
d62a17ae 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);
718e3744 3359 }
3360
d62a17ae 3361 /* Delete static routes (networks). */
3362 bgp_static_delete(bgp);
6b0655a2 3363
d62a17ae 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);
718e3744 3369
d62a17ae 3370 /* Free peers and peer-groups. */
3371 for (ALL_LIST_ELEMENTS(bgp->group, node, next, group))
3372 peer_group_delete(group);
718e3744 3373
d62a17ae 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;
718e3744 3380 }
3381
d62a17ae 3382 update_bgp_group_free(bgp);
718e3744 3383
d62a17ae 3384/* TODO - Other memory may need to be freed - e.g., NHT */
3385
49e5a4a0 3386#ifdef ENABLE_BGP_VNC
d62a17ae 3387 rfapi_delete(bgp);
3388#endif
3389 bgp_cleanup_routes(bgp);
718e3744 3390
301ad80a
PG		 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 }
718e3744 3399
d62a17ae 3400 /* Deregister from Zebra, if needed */
bb4ef1ae
DS		 3401 if (IS_BGP_INST_KNOWN_TO_ZEBRA(bgp)) {
3402 if (BGP_DEBUG(zebra, ZEBRA))
5e81f5dd
DS		 3403 zlog_debug(
3404 "%s: deregistering this bgp %s instance from zebra",
3405 __func__, bgp->name);
d62a17ae 3406 bgp_zebra_instance_deregister(bgp);
bb4ef1ae 3407 }
718e3744 3408
de6058ab
AK		 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
d62a17ae 3414 /* Free interfaces in this instance. */
3415 bgp_if_finish(bgp);
718e3744 3416
d62a17ae 3417 vrf = bgp_vrf_lookup_by_instance_type(bgp);
e5619c28 3418 bgp_handle_socket(bgp, vrf, VRF_UNKNOWN, false);
d62a17ae 3419 if (vrf)
3420 bgp_vrf_unlink(bgp, vrf);
718e3744 3421
e2f3a930
T		 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
d62a17ae 3430 thread_master_free_unused(bm->master);
3431 bgp_unlock(bgp); /* initial reference */
718e3744 3432
d62a17ae 3433 return 0;
718e3744 3434}
6b0655a2 3435
92375c91 3436void bgp_free(struct bgp *bgp)
d93f7ffc 3437{
d62a17ae 3438 afi_t afi;
3439 safi_t safi;
3440 struct bgp_table *table;
9bcb3eef 3441 struct bgp_dest *dest;
f8265580 3442 struct bgp_rmap *rmap;
d93f7ffc 3443
d62a17ae 3444 QOBJ_UNREG(bgp);
d93f7ffc 3445
6a154c88
DL		 3446 list_delete(&bgp->group);
3447 list_delete(&bgp->peer);
966f821c 3448
d62a17ae 3449 if (bgp->peerhash) {
3450 hash_free(bgp->peerhash);
3451 bgp->peerhash = NULL;
3452 }
718e3744 3453
05c7a1cc
QY		 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) {
9bcb3eef
DS		 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);
05c7a1cc 3461 bgp_table_finish(&table);
d62a17ae 3462 }
d62a17ae 3463 }
05c7a1cc
QY		 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];
0a22ddfb 3471 XFREE(MTYPE_ROUTE_MAP_NAME, rmap->name);
05c7a1cc 3472 }
718e3744 3473
d62a17ae 3474 bgp_scan_finish(bgp);
3475 bgp_address_destroy(bgp);
db0e1937 3476 bgp_tip_hash_destroy(bgp);
966f821c 3477
92708db6 3478 /* release the auto RD id */
3479 bf_release_index(bm->rd_idspace, bgp->vrf_rd_id);
3480
d62a17ae 3481 bgp_evpn_cleanup(bgp);
a6b07429 3482 bgp_pbr_cleanup(bgp);
85c8d83b 3483 XFREE(MTYPE_BGP_EVPN_INFO, bgp->evpn_info);
829e590b
DS		 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)
6a154c88 3489 list_delete(&bgp->vpn_policy[afi].import_vrf);
829e590b 3490 if (bgp->vpn_policy[afi].export_vrf)
6a154c88 3491 list_delete(&bgp->vpn_policy[afi].export_vrf);
829e590b
DS		 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
0a22ddfb
QY		 3501 XFREE(MTYPE_BGP, bgp->name);
3502 XFREE(MTYPE_BGP, bgp->name_pretty);
966f821c 3503
d62a17ae 3504 XFREE(MTYPE_BGP, bgp);
718e3744 3505}
3506
d62a17ae 3507struct peer *peer_lookup_by_conf_if(struct bgp *bgp, const char *conf_if)
718e3744 3508{
d62a17ae 3509 struct peer *peer;
3510 struct listnode *node, *nnode;
966f821c 3511
d62a17ae 3512 if (!conf_if)
3513 return NULL;
6b0655a2 3514
d62a17ae 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;
718e3744 3533}
3534
d62a17ae 3535struct peer *peer_lookup_by_hostname(struct bgp *bgp, const char *hostname)
718e3744 3536{
d62a17ae 3537 struct peer *peer;
3538 struct listnode *node, *nnode;
6b0655a2 3539
d62a17ae 3540 if (!hostname)
3541 return NULL;
6b0655a2 3542
d62a17ae 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
3563struct 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)) {
d62a17ae 3585 peer = hash_lookup(bgp->peerhash, &tmp_peer);
d62a17ae 3586 if (peer)
3587 break;
3588 }
3589 }
3590
3591 return peer;
3592}
3593
3594struct 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 */
05c7a1cc
QY		 3619 FOREACH_AFI_SAFI (afi, safi) {
3620 if (!group->conf->afc[afi][safi])
3621 continue;
3622 peer->afc[afi][safi] = 1;
d62a17ae 3623
05c7a1cc
QY		 3624 if (!peer_af_find(peer, afi, safi))
3625 peer_af_create(peer, afi, safi);
d62a17ae 3626
05c7a1cc
QY		 3627 peer_group2peer_config_copy_af(group, peer, afi, safi);
3628 }
d62a17ae 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
3638struct prefix *
3639peer_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
3657struct peer_group *
3658peer_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
3681found_range:
3682 *listen_range = range;
3683 return (group && range) ? group : NULL;
3684}
3685
3686struct 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
cc32742c 3761static void peer_drop_dynamic_neighbor(struct peer *peer)
d62a17ae 3762{
3763 int dncount = -1;
cc32742c 3764 if (peer->group->bgp) {
d62a17ae 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
d62a17ae 3774/* If peer is configured at least one address family return 1. */
3dc339cd 3775bool peer_active(struct peer *peer)
d62a17ae 3776{
3777 if (BGP_PEER_SU_UNSPEC(peer))
3dc339cd 3778 return false;
d62a17ae 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]
7c40bf39 3782 || peer->afc[AFI_IP][SAFI_FLOWSPEC]
d62a17ae 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]
7c40bf39 3788 || peer->afc[AFI_IP6][SAFI_FLOWSPEC]
d62a17ae 3789 || peer->afc[AFI_L2VPN][SAFI_EVPN])
3dc339cd
DA		 3790 return true;
3791 return false;
d62a17ae 3792}
3793
3794/* If peer is negotiated at least one address family return 1. */
3dc339cd 3795bool peer_active_nego(struct peer *peer)
d62a17ae 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]
7c40bf39 3802 || peer->afc_nego[AFI_IP][SAFI_FLOWSPEC]
d62a17ae 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]
7c40bf39 3808 || peer->afc_nego[AFI_IP6][SAFI_FLOWSPEC]
d62a17ae 3809 || peer->afc_nego[AFI_L2VPN][SAFI_EVPN])
3dc339cd
DA		 3810 return true;
3811 return false;
d62a17ae 3812}
3813
dcc68b5e 3814void peer_change_action(struct peer *peer, afi_t afi, safi_t safi,
d62a17ae 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
3854struct peer_flag_action {
3855 /* Peer's flag. */
d7c0a89a 3856 uint32_t flag;
d62a17ae 3857
3858 /* This flag can be set for peer-group member. */
d7c0a89a 3859 uint8_t not_for_member;
d62a17ae 3860
3861 /* Action when the flag is changed. */
3862 enum peer_change_type type;
d62a17ae 3863};
3864
3865static 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},
47cbc09b 3874 {PEER_FLAG_ENFORCE_FIRST_AS, 0, peer_change_reset_in},
afad5ced 3875 {PEER_FLAG_IFPEER_V6ONLY, 0, peer_change_reset},
b90a8e13
PM		 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},
a14810f4
PM		 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},
d62a17ae 3884 {0, 0, 0}};
3885
3886static 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},
598ce6bd 3897 {PEER_FLAG_DEFAULT_ORIGINATE, 0, peer_change_none},
d62a17ae 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},
598ce6bd
PM		 3903 {PEER_FLAG_MAX_PREFIX, 0, peer_change_none},
3904 {PEER_FLAG_MAX_PREFIX_WARNING, 0, peer_change_none},
9cbd06e0 3905 {PEER_FLAG_MAX_PREFIX_FORCE, 0, peer_change_none},
d62a17ae 3906 {PEER_FLAG_NEXTHOP_LOCAL_UNCHANGED, 0, peer_change_reset_out},
3907 {PEER_FLAG_FORCE_NEXTHOP_SELF, 1, peer_change_reset_out},
3908 {PEER_FLAG_REMOVE_PRIVATE_AS_ALL, 1, peer_change_reset_out},
3909 {PEER_FLAG_REMOVE_PRIVATE_AS_REPLACE, 1, peer_change_reset_out},
3910 {PEER_FLAG_AS_OVERRIDE, 1, peer_change_reset_out},
3911 {PEER_FLAG_REMOVE_PRIVATE_AS_ALL_REPLACE, 1, peer_change_reset_out},
d62a17ae 3912 {PEER_FLAG_WEIGHT, 0, peer_change_reset_in},
3913 {0, 0, 0}};
3914
3915/* Proper action set. */
3916static int peer_flag_action_set(const struct peer_flag_action *action_list,
3917 int size, struct peer_flag_action *action,
d7c0a89a 3918 uint32_t flag)
d62a17ae 3919{
3920 int i;
3921 int found = 0;
3922 int reset_in = 0;
3923 int reset_out = 0;
3924 const struct peer_flag_action *match = NULL;
3925
3926 /* Check peer's frag action. */
3927 for (i = 0; i < size; i++) {
3928 match = &action_list[i];
3929
3930 if (match->flag == 0)
3931 break;
3932
3933 if (match->flag & flag) {
3934 found = 1;
3935
3936 if (match->type == peer_change_reset_in)
3937 reset_in = 1;
3938 if (match->type == peer_change_reset_out)
3939 reset_out = 1;
3940 if (match->type == peer_change_reset) {
3941 reset_in = 1;
3942 reset_out = 1;
3943 }
3944 if (match->not_for_member)
3945 action->not_for_member = 1;
3946 }
3947 }
3948
3949 /* Set peer clear type. */
3950 if (reset_in && reset_out)
3951 action->type = peer_change_reset;
3952 else if (reset_in)
3953 action->type = peer_change_reset_in;
3954 else if (reset_out)
3955 action->type = peer_change_reset_out;
3956 else
3957 action->type = peer_change_none;
3958
3959 return found;
3960}
3961
d7c0a89a 3962static void peer_flag_modify_action(struct peer *peer, uint32_t flag)
d62a17ae 3963{
3964 if (flag == PEER_FLAG_SHUTDOWN) {
3965 if (CHECK_FLAG(peer->flags, flag)) {
3966 if (CHECK_FLAG(peer->sflags, PEER_STATUS_NSF_WAIT))
3967 peer_nsf_stop(peer);
3968
3969 UNSET_FLAG(peer->sflags, PEER_STATUS_PREFIX_OVERFLOW);
3970 if (peer->t_pmax_restart) {
3971 BGP_TIMER_OFF(peer->t_pmax_restart);
3972 if (bgp_debug_neighbor_events(peer))
3973 zlog_debug(
3974 "%s Maximum-prefix restart timer canceled",
3975 peer->host);
3976 }
3977
3978 if (CHECK_FLAG(peer->sflags, PEER_STATUS_NSF_WAIT))
3979 peer_nsf_stop(peer);
3980
3981 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status)) {
3982 char *msg = peer->tx_shutdown_message;
3983 size_t msglen;
3984
3985 if (!msg && peer_group_active(peer))
3986 msg = peer->group->conf
3987 ->tx_shutdown_message;
3988 msglen = msg ? strlen(msg) : 0;
3989 if (msglen > 128)
3990 msglen = 128;
3991
3992 if (msglen) {
d7c0a89a 3993 uint8_t msgbuf[129];
d62a17ae 3994
3995 msgbuf[0] = msglen;
3996 memcpy(msgbuf + 1, msg, msglen);
3997
3998 bgp_notify_send_with_data(
3999 peer, BGP_NOTIFY_CEASE,
4000 BGP_NOTIFY_CEASE_ADMIN_SHUTDOWN,
4001 msgbuf, msglen + 1);
4002 } else
4003 bgp_notify_send(
4004 peer, BGP_NOTIFY_CEASE,
4005 BGP_NOTIFY_CEASE_ADMIN_SHUTDOWN);
4006 } else
4007 bgp_session_reset(peer);
4008 } else {
4009 peer->v_start = BGP_INIT_START_TIMER;
4010 BGP_EVENT_ADD(peer, BGP_Stop);
4011 }
4012 } else if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status)) {
4013 if (flag == PEER_FLAG_DYNAMIC_CAPABILITY)
4014 peer->last_reset = PEER_DOWN_CAPABILITY_CHANGE;
4015 else if (flag == PEER_FLAG_PASSIVE)
4016 peer->last_reset = PEER_DOWN_PASSIVE_CHANGE;
4017 else if (flag == PEER_FLAG_DISABLE_CONNECTED_CHECK)
4018 peer->last_reset = PEER_DOWN_MULTIHOP_CHANGE;
4019
4020 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
4021 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4022 } else
4023 bgp_session_reset(peer);
4024}
4025
9cf59432
DS		 4026/* Enable global administrative shutdown of all peers of BGP instance */
4027void bgp_shutdown_enable(struct bgp *bgp)
4028{
4029 struct peer *peer;
4030 struct listnode *node;
4031
4032 /* do nothing if already shut down */
4033 if (CHECK_FLAG(bgp->flags, BGP_FLAG_SHUTDOWN))
4034 return;
4035
e03f1f18
DS		 4036 /* TODO: log message
4037 zlog_info("Enabled administrative shutdown on BGP instance %s",
4038 bgp->name); */
4039
9cf59432
DS		 4040 /* iterate through peers of BGP instance */
4041 for (ALL_LIST_ELEMENTS_RO(bgp->peer, node, peer)) {
4042 /* continue, if peer is already in administrative shutdown. */
4043 if (CHECK_FLAG(peer->flags, PEER_FLAG_SHUTDOWN))
4044 continue;
4045
4046 /* send a RFC 4486 notification message if necessary */
4047 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status)) {
4048 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
4049 BGP_NOTIFY_CEASE_ADMIN_SHUTDOWN);
4050 }
4051
4052 /* reset start timer to initial value */
4053 peer->v_start = BGP_INIT_START_TIMER;
4054
4055 /* trigger a RFC 4271 ManualStop event */
4056 BGP_EVENT_ADD(peer, BGP_Stop);
e03f1f18
DS		 4057
4058 /* TODO: log message per peer?
4059 if (bgp_debug_neighbor_events(peer))
4060 zlog_debug("Neighbor %s is now in administrative shutdown.",
4061 peer->host); */
9cf59432
DS		 4062 }
4063
4064 /* set the BGP instances shutdown flag */
4065 SET_FLAG(bgp->flags, BGP_FLAG_SHUTDOWN);
4066}
4067
4068/* Disable global administrative shutdown of all peers of BGP instance */
4069void bgp_shutdown_disable(struct bgp *bgp)
4070{
9cf59432
DS		 4071 /* do nothing if not shut down. */
4072 if (!CHECK_FLAG(bgp->flags, BGP_FLAG_SHUTDOWN))
4073 return;
4074
e03f1f18
DS		 4075 /* TODO: log message
4076 zlog_info("Disabled administrative shutdown on BGP instance %s",
4077 bgp->name); */
9cf59432
DS		 4078
4079 /* clear the BGP instances shutdown flag */
4080 UNSET_FLAG(bgp->flags, BGP_FLAG_SHUTDOWN);
4081}
4082
d62a17ae 4083/* Change specified peer flag. */
d7c0a89a 4084static int peer_flag_modify(struct peer *peer, uint32_t flag, int set)
d62a17ae 4085{
4086 int found;
4087 int size;
9fb964de
PM		 4088 bool invert, member_invert;
4089 struct peer *member;
d62a17ae 4090 struct listnode *node, *nnode;
4091 struct peer_flag_action action;
4092
4093 memset(&action, 0, sizeof(struct peer_flag_action));
0d6f7fd6 4094 size = sizeof(peer_flag_action_list) / sizeof(struct peer_flag_action);
d62a17ae 4095
9fb964de 4096 invert = CHECK_FLAG(peer->flags_invert, flag);
d62a17ae 4097 found = peer_flag_action_set(peer_flag_action_list, size, &action,
4098 flag);
4099
9fb964de 4100 /* Abort if no flag action exists. */
d62a17ae 4101 if (!found)
4102 return BGP_ERR_INVALID_FLAG;
4103
9fb964de 4104 /* Check for flag conflict: STRICT_CAP_MATCH && OVERRIDE_CAPABILITY */
d62a17ae 4105 if (set && CHECK_FLAG(peer->flags | flag, PEER_FLAG_STRICT_CAP_MATCH)
4106 && CHECK_FLAG(peer->flags | flag, PEER_FLAG_OVERRIDE_CAPABILITY))
4107 return BGP_ERR_PEER_FLAG_CONFLICT;
4108
9fb964de 4109 /* Handle flag updates where desired state matches current state. */
d62a17ae 4110 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
9fb964de
PM		 4111 if (set && CHECK_FLAG(peer->flags, flag)) {
4112 COND_FLAG(peer->flags_override, flag, !invert);
d62a17ae 4113 return 0;
9fb964de
PM		 4114 }
4115
4116 if (!set && !CHECK_FLAG(peer->flags, flag)) {
4117 COND_FLAG(peer->flags_override, flag, invert);
d62a17ae 4118 return 0;
9fb964de 4119 }
d62a17ae 4120 }
4121
9fb964de
PM		 4122 /* Inherit from peer-group or set/unset flags accordingly. */
4123 if (peer_group_active(peer) && set == invert)
4124 peer_flag_inherit(peer, flag);
d62a17ae 4125 else
9fb964de 4126 COND_FLAG(peer->flags, flag, set);
d62a17ae 4127
9fb964de 4128 /* Check if handling a regular peer. */
d62a17ae 4129 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
9fb964de
PM		 4130 /* Update flag override state accordingly. */
4131 COND_FLAG(peer->flags_override, flag, set != invert);
4132
b3a3290e
DS		 4133 /*
4134 * For the extended next-hop encoding flag we need to turn RAs
4135 * on if flag is being set, but only turn RAs off if the flag
4136 * is being unset on this peer and if this peer is a member of a
4137 * peer-group, the peer-group also doesn't have the flag set.
4138 */
4139 if (flag == PEER_FLAG_CAPABILITY_ENHE) {
4140 if (set) {
4141 bgp_zebra_initiate_radv(peer->bgp, peer);
4142 } else if (peer_group_active(peer)) {
4143 if (!CHECK_FLAG(peer->group->conf->flags, flag))
4144 bgp_zebra_terminate_radv(peer->bgp,
4145 peer);
4146 } else
4147 bgp_zebra_terminate_radv(peer->bgp, peer);
4148 }
087a1c6c 4149
9fb964de 4150 /* Execute flag action on peer. */
d62a17ae 4151 if (action.type == peer_change_reset)
4152 peer_flag_modify_action(peer, flag);
4153
9fb964de 4154 /* Skip peer-group mechanics for regular peers. */
d62a17ae 4155 return 0;
4156 }
4157
9fb964de
PM		 4158 /*
4159 * Update peer-group members, unless they are explicitely overriding
4160 * peer-group configuration.
4161 */
4162 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
4163 /* Skip peers with overridden configuration. */
4164 if (CHECK_FLAG(member->flags_override, flag))
4165 continue;
d62a17ae 4166
527de3dc
PM		 4167 /* Check if only member without group is inverted. */
4168 member_invert =
4169 CHECK_FLAG(member->flags_invert, flag) && !invert;
d62a17ae 4170
9fb964de
PM		 4171 /* Skip peers with equivalent configuration. */
4172 if (set != member_invert && CHECK_FLAG(member->flags, flag))
d62a17ae 4173 continue;
4174
9fb964de 4175 if (set == member_invert && !CHECK_FLAG(member->flags, flag))
d62a17ae 4176 continue;
4177
9fb964de
PM		 4178 /* Update flag on peer-group member. */
4179 COND_FLAG(member->flags, flag, set != member_invert);
d62a17ae 4180
b3a3290e
DS		 4181 if (flag == PEER_FLAG_CAPABILITY_ENHE)
4182 set ? bgp_zebra_initiate_radv(member->bgp, member)
4183 : bgp_zebra_terminate_radv(member->bgp, member);
1ea03b90 4184
9fb964de 4185 /* Execute flag action on peer-group member. */
d62a17ae 4186 if (action.type == peer_change_reset)
9fb964de 4187 peer_flag_modify_action(member, flag);
d62a17ae 4188 }
9fb964de 4189
d62a17ae 4190 return 0;
4191}
4192
d7c0a89a 4193int peer_flag_set(struct peer *peer, uint32_t flag)
d62a17ae 4194{
4195 return peer_flag_modify(peer, flag, 1);
4196}
4197
d7c0a89a 4198int peer_flag_unset(struct peer *peer, uint32_t flag)
d62a17ae 4199{
4200 return peer_flag_modify(peer, flag, 0);
4201}
4202
4203static int peer_af_flag_modify(struct peer *peer, afi_t afi, safi_t safi,
27c05d4d 4204 uint32_t flag, bool set)
d62a17ae 4205{
4206 int found;
4207 int size;
527de3dc 4208 bool invert, member_invert;
527de3dc 4209 struct peer *member;
d62a17ae 4210 struct listnode *node, *nnode;
d62a17ae 4211 struct peer_flag_action action;
469cbb0f 4212 bgp_peer_sort_t ptype;
d62a17ae 4213
4214 memset(&action, 0, sizeof(struct peer_flag_action));
0d6f7fd6 4215 size = sizeof(peer_af_flag_action_list)
d62a17ae 4216 / sizeof(struct peer_flag_action);
4217
27c05d4d 4218 invert = CHECK_FLAG(peer->af_flags_invert[afi][safi], flag);
d62a17ae 4219 found = peer_flag_action_set(peer_af_flag_action_list, size, &action,
4220 flag);
4221
527de3dc 4222 /* Abort if flag action exists. */
d62a17ae 4223 if (!found)
4224 return BGP_ERR_INVALID_FLAG;
4225
469cbb0f 4226 ptype = peer_sort(peer);
d62a17ae 4227 /* Special check for reflector client. */
469cbb0f 4228 if (flag & PEER_FLAG_REFLECTOR_CLIENT && ptype != BGP_PEER_IBGP)
d62a17ae 4229 return BGP_ERR_NOT_INTERNAL_PEER;
4230
4231 /* Special check for remove-private-AS. */
469cbb0f 4232 if (flag & PEER_FLAG_REMOVE_PRIVATE_AS && ptype == BGP_PEER_IBGP)
d62a17ae 4233 return BGP_ERR_REMOVE_PRIVATE_AS;
4234
4235 /* as-override is not allowed for IBGP peers */
469cbb0f 4236 if (flag & PEER_FLAG_AS_OVERRIDE && ptype == BGP_PEER_IBGP)
d62a17ae 4237 return BGP_ERR_AS_OVERRIDE;
4238
527de3dc 4239 /* Handle flag updates where desired state matches current state. */
d62a17ae 4240 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
598ce6bd 4241 if (set && CHECK_FLAG(peer->af_flags[afi][safi], flag)) {
527de3dc
PM		 4242 COND_FLAG(peer->af_flags_override[afi][safi], flag,
4243 !invert);
d62a17ae 4244 return 0;
598ce6bd
PM		 4245 }
4246
4247 if (!set && !CHECK_FLAG(peer->af_flags[afi][safi], flag)) {
527de3dc
PM		 4248 COND_FLAG(peer->af_flags_override[afi][safi], flag,
4249 invert);
d62a17ae 4250 return 0;
598ce6bd 4251 }
d62a17ae 4252 }
4253
ace295a9
MK		 4254 /*
4255 * For EVPN we implicitly set the NEXTHOP_UNCHANGED flag,
4256 * if we are setting/unsetting flags which conflict with this flag
4257 * handle accordingly
4258 */
4259 if (afi == AFI_L2VPN && safi == SAFI_EVPN) {
4260 if (set) {
4261
3518f352
DS		 4262 /*
4263 * if we are setting NEXTHOP_SELF, we need to unset the
4264 * NEXTHOP_UNCHANGED flag
4265 */
ace295a9
MK		 4266 if (CHECK_FLAG(flag, PEER_FLAG_NEXTHOP_SELF) ||
4267 CHECK_FLAG(flag, PEER_FLAG_FORCE_NEXTHOP_SELF))
4268 UNSET_FLAG(peer->af_flags[afi][safi],
4269 PEER_FLAG_NEXTHOP_UNCHANGED);
4270 } else {
4271
3518f352
DS		 4272 /*
4273 * if we are unsetting NEXTHOP_SELF, we need to set the
ace295a9
MK		 4274 * NEXTHOP_UNCHANGED flag to reset the defaults for EVPN
4275 */
4276 if (CHECK_FLAG(flag, PEER_FLAG_NEXTHOP_SELF) ||
4277 CHECK_FLAG(flag, PEER_FLAG_FORCE_NEXTHOP_SELF))
4278 SET_FLAG(peer->af_flags[afi][safi],
4279 PEER_FLAG_NEXTHOP_UNCHANGED);
4280 }
4281 }
4282
99819027
DS		 4283 /*
4284 * If the peer is a route server client let's not
4285 * muck with the nexthop on the way out the door
4286 */
4287 if (flag & PEER_FLAG_RSERVER_CLIENT) {
4288 if (set)
4289 SET_FLAG(peer->af_flags[afi][safi],
4290 PEER_FLAG_NEXTHOP_UNCHANGED);
4291 else
4292 UNSET_FLAG(peer->af_flags[afi][safi],
4293 PEER_FLAG_NEXTHOP_UNCHANGED);
4294 }
4295
527de3dc
PM		 4296 /* Inherit from peer-group or set/unset flags accordingly. */
4297 if (peer_group_active(peer) && set == invert)
4298 peer_af_flag_inherit(peer, afi, safi, flag);
4299 else
4300 COND_FLAG(peer->af_flags[afi][safi], flag, set);
d62a17ae 4301
4302 /* Execute action when peer is established. */
4303 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)
4304 && peer->status == Established) {
4305 if (!set && flag == PEER_FLAG_SOFT_RECONFIG)
4306 bgp_clear_adj_in(peer, afi, safi);
4307 else {
4308 if (flag == PEER_FLAG_REFLECTOR_CLIENT)
4309 peer->last_reset = PEER_DOWN_RR_CLIENT_CHANGE;
4310 else if (flag == PEER_FLAG_RSERVER_CLIENT)
4311 peer->last_reset = PEER_DOWN_RS_CLIENT_CHANGE;
4312 else if (flag == PEER_FLAG_ORF_PREFIX_SM)
4313 peer->last_reset = PEER_DOWN_CAPABILITY_CHANGE;
4314 else if (flag == PEER_FLAG_ORF_PREFIX_RM)
4315 peer->last_reset = PEER_DOWN_CAPABILITY_CHANGE;
4316
4317 peer_change_action(peer, afi, safi, action.type);
4318 }
4319 }
4320
527de3dc
PM		 4321 /* Check if handling a regular peer. */
4322 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4323 COND_FLAG(peer->af_flags_override[afi][safi], flag,
4324 set != invert);
4325 } else {
4326 /*
4327 * Update peer-group members, unless they are explicitely
4328 * overriding peer-group configuration.
4329 */
4330 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode,
4331 member)) {
4332 /* Skip peers with overridden configuration. */
4333 if (CHECK_FLAG(member->af_flags_override[afi][safi],
598ce6bd
PM		 4334 flag))
4335 continue;
4336
527de3dc
PM		 4337 /* Check if only member without group is inverted. */
4338 member_invert =
4339 CHECK_FLAG(member->af_flags_invert[afi][safi],
4340 flag)
4341 && !invert;
4342
4343 /* Skip peers with equivalent configuration. */
4344 if (set != member_invert
4345 && CHECK_FLAG(member->af_flags[afi][safi], flag))
d62a17ae 4346 continue;
4347
527de3dc
PM		 4348 if (set == member_invert
4349 && !CHECK_FLAG(member->af_flags[afi][safi], flag))
d62a17ae 4350 continue;
4351
527de3dc
PM		 4352 /* Update flag on peer-group member. */
4353 COND_FLAG(member->af_flags[afi][safi], flag,
4354 set != member_invert);
d62a17ae 4355
527de3dc
PM		 4356 /* Execute flag action on peer-group member. */
4357 if (member->status == Established) {
d62a17ae 4358 if (!set && flag == PEER_FLAG_SOFT_RECONFIG)
527de3dc 4359 bgp_clear_adj_in(member, afi, safi);
d62a17ae 4360 else {
4361 if (flag == PEER_FLAG_REFLECTOR_CLIENT)
527de3dc 4362 member->last_reset =
d62a17ae 4363 PEER_DOWN_RR_CLIENT_CHANGE;
4364 else if (flag
4365 == PEER_FLAG_RSERVER_CLIENT)
527de3dc 4366 member->last_reset =
d62a17ae 4367 PEER_DOWN_RS_CLIENT_CHANGE;
4368 else if (flag
4369 == PEER_FLAG_ORF_PREFIX_SM)
527de3dc 4370 member->last_reset =
d62a17ae 4371 PEER_DOWN_CAPABILITY_CHANGE;
4372 else if (flag
4373 == PEER_FLAG_ORF_PREFIX_RM)
527de3dc 4374 member->last_reset =
d62a17ae 4375 PEER_DOWN_CAPABILITY_CHANGE;
4376
527de3dc 4377 peer_change_action(member, afi, safi,
d62a17ae 4378 action.type);
4379 }
4380 }
4381 }
4382 }
4383
d62a17ae 4384 return 0;
4385}
4386
d7c0a89a 4387int peer_af_flag_set(struct peer *peer, afi_t afi, safi_t safi, uint32_t flag)
d62a17ae 4388{
4389 return peer_af_flag_modify(peer, afi, safi, flag, 1);
4390}
4391
d7c0a89a 4392int peer_af_flag_unset(struct peer *peer, afi_t afi, safi_t safi, uint32_t flag)
d62a17ae 4393{
4394 return peer_af_flag_modify(peer, afi, safi, flag, 0);
4395}
4396
4397
3dc339cd 4398void peer_tx_shutdown_message_set(struct peer *peer, const char *msg)
d62a17ae 4399{
4400 XFREE(MTYPE_PEER_TX_SHUTDOWN_MSG, peer->tx_shutdown_message);
4401 peer->tx_shutdown_message =
4402 msg ? XSTRDUP(MTYPE_PEER_TX_SHUTDOWN_MSG, msg) : NULL;
d62a17ae 4403}
4404
3dc339cd 4405void peer_tx_shutdown_message_unset(struct peer *peer)
d62a17ae 4406{
4407 XFREE(MTYPE_PEER_TX_SHUTDOWN_MSG, peer->tx_shutdown_message);
d62a17ae 4408}
4409
4410
4411/* EBGP multihop configuration. */
4412int peer_ebgp_multihop_set(struct peer *peer, int ttl)
4413{
4414 struct peer_group *group;
4415 struct listnode *node, *nnode;
4416 struct peer *peer1;
4417
4418 if (peer->sort == BGP_PEER_IBGP || peer->conf_if)
4419 return 0;
4420
4421 /* see comment in peer_ttl_security_hops_set() */
4422 if (ttl != MAXTTL) {
4423 if (CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4424 group = peer->group;
e2521429 4425 if (group->conf->gtsm_hops != BGP_GTSM_HOPS_DISABLED)
d62a17ae 4426 return BGP_ERR_NO_EBGP_MULTIHOP_WITH_TTLHACK;
4427
4428 for (ALL_LIST_ELEMENTS(group->peer, node, nnode,
4429 peer1)) {
4430 if (peer1->sort == BGP_PEER_IBGP)
4431 continue;
4432
e2521429 4433 if (peer1->gtsm_hops != BGP_GTSM_HOPS_DISABLED)
d62a17ae 4434 return BGP_ERR_NO_EBGP_MULTIHOP_WITH_TTLHACK;
4435 }
4436 } else {
e2521429 4437 if (peer->gtsm_hops != BGP_GTSM_HOPS_DISABLED)
d62a17ae 4438 return BGP_ERR_NO_EBGP_MULTIHOP_WITH_TTLHACK;
4439 }
4440 }
4441
4442 peer->ttl = ttl;
4443
4444 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4445 if (peer->fd >= 0 && peer->sort != BGP_PEER_IBGP) {
4446 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status))
4447 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
4448 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4449 else
4450 bgp_session_reset(peer);
4451 }
4452 } else {
4453 group = peer->group;
4454 for (ALL_LIST_ELEMENTS(group->peer, node, nnode, peer)) {
4455 if (peer->sort == BGP_PEER_IBGP)
4456 continue;
4457
4458 peer->ttl = group->conf->ttl;
4459
4460 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status))
4461 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
4462 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4463 else
4464 bgp_session_reset(peer);
4465 }
4466 }
4467 return 0;
4468}
4469
4470int peer_ebgp_multihop_unset(struct peer *peer)
4471{
4472 struct peer_group *group;
4473 struct listnode *node, *nnode;
4474
4475 if (peer->sort == BGP_PEER_IBGP)
4476 return 0;
4477
e2521429 4478 if (peer->gtsm_hops != BGP_GTSM_HOPS_DISABLED && peer->ttl != MAXTTL)
d62a17ae 4479 return BGP_ERR_NO_EBGP_MULTIHOP_WITH_TTLHACK;
4480
4481 if (peer_group_active(peer))
4482 peer->ttl = peer->group->conf->ttl;
4483 else
a0903cd2 4484 peer->ttl = BGP_DEFAULT_TTL;
d62a17ae 4485
4486 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4487 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status))
4488 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
4489 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4490 else
4491 bgp_session_reset(peer);
4492 } else {
4493 group = peer->group;
4494 for (ALL_LIST_ELEMENTS(group->peer, node, nnode, peer)) {
4495 if (peer->sort == BGP_PEER_IBGP)
4496 continue;
4497
a0903cd2 4498 peer->ttl = BGP_DEFAULT_TTL;
d62a17ae 4499
4500 if (peer->fd >= 0) {
4501 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status))
4502 bgp_notify_send(
4503 peer, BGP_NOTIFY_CEASE,
4504 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4505 else
4506 bgp_session_reset(peer);
4507 }
4508 }
4509 }
4510 return 0;
4511}
4512
4513/* Neighbor description. */
3dc339cd 4514void peer_description_set(struct peer *peer, const char *desc)
d62a17ae 4515{
0a22ddfb 4516 XFREE(MTYPE_PEER_DESC, peer->desc);
d62a17ae 4517
4518 peer->desc = XSTRDUP(MTYPE_PEER_DESC, desc);
d62a17ae 4519}
4520
3dc339cd 4521void peer_description_unset(struct peer *peer)
d62a17ae 4522{
0a22ddfb 4523 XFREE(MTYPE_PEER_DESC, peer->desc);
d62a17ae 4524}
4525
4526/* Neighbor update-source. */
4527int peer_update_source_if_set(struct peer *peer, const char *ifname)
4528{
a14810f4 4529 struct peer *member;
d62a17ae 4530 struct listnode *node, *nnode;
4531
a14810f4
PM		 4532 /* Set flag and configuration on peer. */
4533 peer_flag_set(peer, PEER_FLAG_UPDATE_SOURCE);
d62a17ae 4534 if (peer->update_if) {
a14810f4 4535 if (strcmp(peer->update_if, ifname) == 0)
d62a17ae 4536 return 0;
d62a17ae 4537 XFREE(MTYPE_PEER_UPDATE_SOURCE, peer->update_if);
d62a17ae 4538 }
d62a17ae 4539 peer->update_if = XSTRDUP(MTYPE_PEER_UPDATE_SOURCE, ifname);
a14810f4
PM		 4540 sockunion_free(peer->update_source);
4541 peer->update_source = NULL;
d62a17ae 4542
a14810f4 4543 /* Check if handling a regular peer. */
d62a17ae 4544 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
a14810f4 4545 /* Send notification or reset peer depending on state. */
d62a17ae 4546 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status)) {
4547 peer->last_reset = PEER_DOWN_UPDATE_SOURCE_CHANGE;
4548 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
4549 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4550 } else
4551 bgp_session_reset(peer);
a14810f4
PM		 4552
4553 /* Skip peer-group mechanics for regular peers. */
d62a17ae 4554 return 0;
4555 }
4556
a14810f4
PM		 4557 /*
4558 * Set flag and configuration on all peer-group members, unless they are
4559 * explicitely overriding peer-group configuration.
4560 */
4561 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
4562 /* Skip peers with overridden configuration. */
4563 if (CHECK_FLAG(member->flags_override, PEER_FLAG_UPDATE_SOURCE))
4564 continue;
d62a17ae 4565
a14810f4
PM		 4566 /* Skip peers with the same configuration. */
4567 if (member->update_if) {
4568 if (strcmp(member->update_if, ifname) == 0)
4569 continue;
4570 XFREE(MTYPE_PEER_UPDATE_SOURCE, member->update_if);
d62a17ae 4571 }
4572
a14810f4
PM		 4573 /* Set flag and configuration on peer-group member. */
4574 SET_FLAG(member->flags, PEER_FLAG_UPDATE_SOURCE);
4575 member->update_if = XSTRDUP(MTYPE_PEER_UPDATE_SOURCE, ifname);
4576 sockunion_free(member->update_source);
4577 member->update_source = NULL;
4578
4579 /* Send notification or reset peer depending on state. */
4580 if (BGP_IS_VALID_STATE_FOR_NOTIF(member->status)) {
4581 member->last_reset = PEER_DOWN_UPDATE_SOURCE_CHANGE;
4582 bgp_notify_send(member, BGP_NOTIFY_CEASE,
d62a17ae 4583 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4584 } else
a14810f4 4585 bgp_session_reset(member);
d62a17ae 4586 }
a14810f4 4587
d62a17ae 4588 return 0;
4589}
4590
4591int peer_update_source_addr_set(struct peer *peer, const union sockunion *su)
4592{
a14810f4 4593 struct peer *member;
d62a17ae 4594 struct listnode *node, *nnode;
4595
a14810f4
PM		 4596 /* Set flag and configuration on peer. */
4597 peer_flag_set(peer, PEER_FLAG_UPDATE_SOURCE);
d62a17ae 4598 if (peer->update_source) {
a14810f4 4599 if (sockunion_cmp(peer->update_source, su) == 0)
d62a17ae 4600 return 0;
4601 sockunion_free(peer->update_source);
d62a17ae 4602 }
d62a17ae 4603 peer->update_source = sockunion_dup(su);
a14810f4 4604 XFREE(MTYPE_PEER_UPDATE_SOURCE, peer->update_if);
d62a17ae 4605
a14810f4 4606 /* Check if handling a regular peer. */
d62a17ae 4607 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
a14810f4 4608 /* Send notification or reset peer depending on state. */
d62a17ae 4609 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status)) {
4610 peer->last_reset = PEER_DOWN_UPDATE_SOURCE_CHANGE;
4611 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
4612 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4613 } else
4614 bgp_session_reset(peer);
a14810f4
PM		 4615
4616 /* Skip peer-group mechanics for regular peers. */
d62a17ae 4617 return 0;
4618 }
4619
a14810f4
PM		 4620 /*
4621 * Set flag and configuration on all peer-group members, unless they are
4622 * explicitely overriding peer-group configuration.
4623 */
4624 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
4625 /* Skip peers with overridden configuration. */
4626 if (CHECK_FLAG(member->flags_override, PEER_FLAG_UPDATE_SOURCE))
4627 continue;
d62a17ae 4628
a14810f4
PM		 4629 /* Skip peers with the same configuration. */
4630 if (member->update_source) {
4631 if (sockunion_cmp(member->update_source, su) == 0)
4632 continue;
4633 sockunion_free(member->update_source);
d62a17ae 4634 }
4635
a14810f4
PM		 4636 /* Set flag and configuration on peer-group member. */
4637 SET_FLAG(member->flags, PEER_FLAG_UPDATE_SOURCE);
4638 member->update_source = sockunion_dup(su);
4639 XFREE(MTYPE_PEER_UPDATE_SOURCE, member->update_if);
4640
4641 /* Send notification or reset peer depending on state. */
4642 if (BGP_IS_VALID_STATE_FOR_NOTIF(member->status)) {
4643 member->last_reset = PEER_DOWN_UPDATE_SOURCE_CHANGE;
4644 bgp_notify_send(member, BGP_NOTIFY_CEASE,
d62a17ae 4645 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4646 } else
a14810f4 4647 bgp_session_reset(member);
d62a17ae 4648 }
a14810f4 4649
d62a17ae 4650 return 0;
4651}
4652
4653int peer_update_source_unset(struct peer *peer)
4654{
a14810f4 4655 struct peer *member;
d62a17ae 4656 struct listnode *node, *nnode;
4657
a14810f4 4658 if (!CHECK_FLAG(peer->flags, PEER_FLAG_UPDATE_SOURCE))
d62a17ae 4659 return 0;
4660
a14810f4
PM		 4661 /* Inherit configuration from peer-group if peer is member. */
4662 if (peer_group_active(peer)) {
4663 peer_flag_inherit(peer, PEER_FLAG_UPDATE_SOURCE);
4664 PEER_SU_ATTR_INHERIT(peer, peer->group, update_source);
4665 PEER_STR_ATTR_INHERIT(peer, peer->group, update_if,
4666 MTYPE_PEER_UPDATE_SOURCE);
4667 } else {
4668 /* Otherwise remove flag and configuration from peer. */
4669 peer_flag_unset(peer, PEER_FLAG_UPDATE_SOURCE);
d62a17ae 4670 sockunion_free(peer->update_source);
4671 peer->update_source = NULL;
d62a17ae 4672 XFREE(MTYPE_PEER_UPDATE_SOURCE, peer->update_if);
d62a17ae 4673 }
4674
a14810f4 4675 /* Check if handling a regular peer. */
d62a17ae 4676 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
a14810f4 4677 /* Send notification or reset peer depending on state. */
d62a17ae 4678 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status)) {
4679 peer->last_reset = PEER_DOWN_UPDATE_SOURCE_CHANGE;
4680 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
4681 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4682 } else
4683 bgp_session_reset(peer);
a14810f4
PM		 4684
4685 /* Skip peer-group mechanics for regular peers. */
d62a17ae 4686 return 0;
4687 }
4688
a14810f4
PM		 4689 /*
4690 * Set flag and configuration on all peer-group members, unless they are
4691 * explicitely overriding peer-group configuration.
4692 */
4693 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
4694 /* Skip peers with overridden configuration. */
4695 if (CHECK_FLAG(member->flags_override, PEER_FLAG_UPDATE_SOURCE))
d62a17ae 4696 continue;
4697
a14810f4
PM		 4698 /* Skip peers with the same configuration. */
4699 if (!CHECK_FLAG(member->flags, PEER_FLAG_UPDATE_SOURCE)
4700 && !member->update_source && !member->update_if)
4701 continue;
d62a17ae 4702
a14810f4
PM		 4703 /* Remove flag and configuration on peer-group member. */
4704 UNSET_FLAG(member->flags, PEER_FLAG_UPDATE_SOURCE);
4705 sockunion_free(member->update_source);
4706 member->update_source = NULL;
4707 XFREE(MTYPE_PEER_UPDATE_SOURCE, member->update_if);
4708
4709 /* Send notification or reset peer depending on state. */
4710 if (BGP_IS_VALID_STATE_FOR_NOTIF(member->status)) {
4711 member->last_reset = PEER_DOWN_UPDATE_SOURCE_CHANGE;
4712 bgp_notify_send(member, BGP_NOTIFY_CEASE,
d62a17ae 4713 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4714 } else
a14810f4 4715 bgp_session_reset(member);
d62a17ae 4716 }
a14810f4 4717
d62a17ae 4718 return 0;
4719}
4720
4721int peer_default_originate_set(struct peer *peer, afi_t afi, safi_t safi,
1de27621 4722 const char *rmap, struct route_map *route_map)
d62a17ae 4723{
598ce6bd 4724 struct peer *member;
d62a17ae 4725 struct listnode *node, *nnode;
4726
598ce6bd
PM		 4727 /* Set flag and configuration on peer. */
4728 peer_af_flag_set(peer, afi, safi, PEER_FLAG_DEFAULT_ORIGINATE);
4729 if (rmap) {
4730 if (!peer->default_rmap[afi][safi].name
4731 || strcmp(rmap, peer->default_rmap[afi][safi].name) != 0) {
d62a17ae 4732 if (peer->default_rmap[afi][safi].name)
4733 XFREE(MTYPE_ROUTE_MAP_NAME,
4734 peer->default_rmap[afi][safi].name);
598ce6bd 4735
b4897fa5 4736 route_map_counter_decrement(peer->default_rmap[afi][safi].map);
d62a17ae 4737 peer->default_rmap[afi][safi].name =
4738 XSTRDUP(MTYPE_ROUTE_MAP_NAME, rmap);
1de27621 4739 peer->default_rmap[afi][safi].map = route_map;
b4897fa5 4740 route_map_counter_increment(route_map);
d62a17ae 4741 }
598ce6bd
PM		 4742 } else if (!rmap) {
4743 if (peer->default_rmap[afi][safi].name)
4744 XFREE(MTYPE_ROUTE_MAP_NAME,
4745 peer->default_rmap[afi][safi].name);
4746
b4897fa5 4747 route_map_counter_decrement(peer->default_rmap[afi][safi].map);
598ce6bd
PM		 4748 peer->default_rmap[afi][safi].name = NULL;
4749 peer->default_rmap[afi][safi].map = NULL;
d62a17ae 4750 }
4751
598ce6bd 4752 /* Check if handling a regular peer. */
d62a17ae 4753 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
598ce6bd 4754 /* Update peer route announcements. */
d62a17ae 4755 if (peer->status == Established && peer->afc_nego[afi][safi]) {
4756 update_group_adjust_peer(peer_af_find(peer, afi, safi));
4757 bgp_default_originate(peer, afi, safi, 0);
4758 bgp_announce_route(peer, afi, safi);
4759 }
598ce6bd
PM		 4760
4761 /* Skip peer-group mechanics for regular peers. */
d62a17ae 4762 return 0;
4763 }
4764
598ce6bd
PM		 4765 /*
4766 * Set flag and configuration on all peer-group members, unless they are
4767 * explicitely overriding peer-group configuration.
4768 */
4769 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
4770 /* Skip peers with overridden configuration. */
4771 if (CHECK_FLAG(member->af_flags_override[afi][safi],
4772 PEER_FLAG_DEFAULT_ORIGINATE))
4773 continue;
d62a17ae 4774
598ce6bd
PM		 4775 /* Set flag and configuration on peer-group member. */
4776 SET_FLAG(member->af_flags[afi][safi],
4777 PEER_FLAG_DEFAULT_ORIGINATE);
d62a17ae 4778 if (rmap) {
598ce6bd 4779 if (member->default_rmap[afi][safi].name)
d62a17ae 4780 XFREE(MTYPE_ROUTE_MAP_NAME,
598ce6bd 4781 member->default_rmap[afi][safi].name);
b4897fa5 4782 route_map_counter_decrement(
4783 member->default_rmap[afi][safi].map);
598ce6bd 4784 member->default_rmap[afi][safi].name =
d62a17ae 4785 XSTRDUP(MTYPE_ROUTE_MAP_NAME, rmap);
1de27621 4786 member->default_rmap[afi][safi].map = route_map;
b4897fa5 4787 route_map_counter_increment(route_map);
d62a17ae 4788 }
4789
598ce6bd
PM		 4790 /* Update peer route announcements. */
4791 if (member->status == Established
4792 && member->afc_nego[afi][safi]) {
4793 update_group_adjust_peer(
4794 peer_af_find(member, afi, safi));
4795 bgp_default_originate(member, afi, safi, 0);
4796 bgp_announce_route(member, afi, safi);
d62a17ae 4797 }
4798 }
598ce6bd 4799
d62a17ae 4800 return 0;
4801}
4802
4803int peer_default_originate_unset(struct peer *peer, afi_t afi, safi_t safi)
4804{
598ce6bd 4805 struct peer *member;
d62a17ae 4806 struct listnode *node, *nnode;
4807
598ce6bd
PM		 4808 /* Inherit configuration from peer-group if peer is member. */
4809 if (peer_group_active(peer)) {
4810 peer_af_flag_inherit(peer, afi, safi,
4811 PEER_FLAG_DEFAULT_ORIGINATE);
e7103a96
PM		 4812 PEER_STR_ATTR_INHERIT(peer, peer->group,
4813 default_rmap[afi][safi].name,
4814 MTYPE_ROUTE_MAP_NAME);
4815 PEER_ATTR_INHERIT(peer, peer->group,
4816 default_rmap[afi][safi].map);
598ce6bd
PM		 4817 } else {
4818 /* Otherwise remove flag and configuration from peer. */
4819 peer_af_flag_unset(peer, afi, safi,
4820 PEER_FLAG_DEFAULT_ORIGINATE);
d62a17ae 4821 if (peer->default_rmap[afi][safi].name)
4822 XFREE(MTYPE_ROUTE_MAP_NAME,
4823 peer->default_rmap[afi][safi].name);
b4897fa5 4824 route_map_counter_decrement(peer->default_rmap[afi][safi].map);
d62a17ae 4825 peer->default_rmap[afi][safi].name = NULL;
4826 peer->default_rmap[afi][safi].map = NULL;
4827 }
4828
598ce6bd 4829 /* Check if handling a regular peer. */
d62a17ae 4830 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
598ce6bd 4831 /* Update peer route announcements. */
d62a17ae 4832 if (peer->status == Established && peer->afc_nego[afi][safi]) {
4833 update_group_adjust_peer(peer_af_find(peer, afi, safi));
4834 bgp_default_originate(peer, afi, safi, 1);
4835 bgp_announce_route(peer, afi, safi);
4836 }
598ce6bd
PM		 4837
4838 /* Skip peer-group mechanics for regular peers. */
d62a17ae 4839 return 0;
4840 }
4841
598ce6bd
PM		 4842 /*
4843 * Remove flag and configuration from all peer-group members, unless
4844 * they are explicitely overriding peer-group configuration.
4845 */
4846 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
4847 /* Skip peers with overridden configuration. */
4848 if (CHECK_FLAG(member->af_flags_override[afi][safi],
4849 PEER_FLAG_DEFAULT_ORIGINATE))
4850 continue;
4851
4852 /* Remove flag and configuration on peer-group member. */
d62a17ae 4853 UNSET_FLAG(peer->af_flags[afi][safi],
4854 PEER_FLAG_DEFAULT_ORIGINATE);
d62a17ae 4855 if (peer->default_rmap[afi][safi].name)
4856 XFREE(MTYPE_ROUTE_MAP_NAME,
4857 peer->default_rmap[afi][safi].name);
b4897fa5 4858 route_map_counter_decrement(peer->default_rmap[afi][safi].map);
d62a17ae 4859 peer->default_rmap[afi][safi].name = NULL;
4860 peer->default_rmap[afi][safi].map = NULL;
4861
598ce6bd 4862 /* Update peer route announcements. */
d62a17ae 4863 if (peer->status == Established && peer->afc_nego[afi][safi]) {
4864 update_group_adjust_peer(peer_af_find(peer, afi, safi));
4865 bgp_default_originate(peer, afi, safi, 1);
4866 bgp_announce_route(peer, afi, safi);
4867 }
4868 }
598ce6bd 4869
d62a17ae 4870 return 0;
4871}
4872
3dc339cd 4873void peer_port_set(struct peer *peer, uint16_t port)
d62a17ae 4874{
4875 peer->port = port;
d62a17ae 4876}
4877
3dc339cd 4878void peer_port_unset(struct peer *peer)
d62a17ae 4879{
4880 peer->port = BGP_PORT_DEFAULT;
d62a17ae 4881}
4882
4883/*
4884 * Helper function that is called after the name of the policy
4885 * being used by a peer has changed (AF specific). Automatically
4886 * initiates inbound or outbound processing as needed.
4887 */
4888static void peer_on_policy_change(struct peer *peer, afi_t afi, safi_t safi,
4889 int outbound)
4890{
4891 if (outbound) {
4892 update_group_adjust_peer(peer_af_find(peer, afi, safi));
4893 if (peer->status == Established)
4894 bgp_announce_route(peer, afi, safi);
4895 } else {
4896 if (peer->status != Established)
4897 return;
4898
4899 if (CHECK_FLAG(peer->af_flags[afi][safi],
4900 PEER_FLAG_SOFT_RECONFIG))
4901 bgp_soft_reconfig_in(peer, afi, safi);
4902 else if (CHECK_FLAG(peer->cap, PEER_CAP_REFRESH_OLD_RCV)
4903 || CHECK_FLAG(peer->cap, PEER_CAP_REFRESH_NEW_RCV))
4904 bgp_route_refresh_send(peer, afi, safi, 0, 0, 0);
4905 }
4906}
4907
4908
4909/* neighbor weight. */
d7c0a89a 4910int peer_weight_set(struct peer *peer, afi_t afi, safi_t safi, uint16_t weight)
d62a17ae 4911{
598ce6bd 4912 struct peer *member;
d62a17ae 4913 struct listnode *node, *nnode;
4914
598ce6bd
PM		 4915 /* Set flag and configuration on peer. */
4916 peer_af_flag_set(peer, afi, safi, PEER_FLAG_WEIGHT);
d62a17ae 4917 if (peer->weight[afi][safi] != weight) {
4918 peer->weight[afi][safi] = weight;
d62a17ae 4919 peer_on_policy_change(peer, afi, safi, 0);
4920 }
4921
598ce6bd 4922 /* Skip peer-group mechanics for regular peers. */
d62a17ae 4923 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP))
4924 return 0;
4925
598ce6bd
PM		 4926 /*
4927 * Set flag and configuration on all peer-group members, unless they are
4928 * explicitely overriding peer-group configuration.
4929 */
4930 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
4931 /* Skip peers with overridden configuration. */
4932 if (CHECK_FLAG(member->af_flags_override[afi][safi],
4933 PEER_FLAG_WEIGHT))
4934 continue;
4935
4936 /* Set flag and configuration on peer-group member. */
4937 SET_FLAG(member->af_flags[afi][safi], PEER_FLAG_WEIGHT);
4938 if (member->weight[afi][safi] != weight) {
4939 member->weight[afi][safi] = weight;
4940 peer_on_policy_change(member, afi, safi, 0);
d62a17ae 4941 }
4942 }
598ce6bd 4943
d62a17ae 4944 return 0;
4945}
4946
4947int peer_weight_unset(struct peer *peer, afi_t afi, safi_t safi)
4948{
598ce6bd 4949 struct peer *member;
d62a17ae 4950 struct listnode *node, *nnode;
4951
598ce6bd
PM		 4952 if (!CHECK_FLAG(peer->af_flags[afi][safi], PEER_FLAG_WEIGHT))
4953 return 0;
4954
4955 /* Inherit configuration from peer-group if peer is member. */
d62a17ae 4956 if (peer_group_active(peer)) {
598ce6bd 4957 peer_af_flag_inherit(peer, afi, safi, PEER_FLAG_WEIGHT);
e7103a96 4958 PEER_ATTR_INHERIT(peer, peer->group, weight[afi][safi]);
d62a17ae 4959
598ce6bd
PM		 4960 peer_on_policy_change(peer, afi, safi, 0);
4961 return 0;
d62a17ae 4962 }
4963
598ce6bd
PM		 4964 /* Remove flag and configuration from peer. */
4965 peer_af_flag_unset(peer, afi, safi, PEER_FLAG_WEIGHT);
4966 peer->weight[afi][safi] = 0;
4967 peer_on_policy_change(peer, afi, safi, 0);
d62a17ae 4968
598ce6bd
PM		 4969 /* Skip peer-group mechanics for regular peers. */
4970 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP))
4971 return 0;
d62a17ae 4972
598ce6bd
PM		 4973 /*
4974 * Remove flag and configuration from all peer-group members, unless
4975 * they are explicitely overriding peer-group configuration.
4976 */
4977 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
4978 /* Skip peers with overridden configuration. */
4979 if (CHECK_FLAG(member->af_flags_override[afi][safi],
4980 PEER_FLAG_WEIGHT))
4981 continue;
4982
4983 /* Skip peers where flag is already disabled. */
4984 if (!CHECK_FLAG(member->af_flags[afi][safi], PEER_FLAG_WEIGHT))
4985 continue;
4986
4987 /* Remove flag and configuration on peer-group member. */
4988 UNSET_FLAG(member->af_flags[afi][safi], PEER_FLAG_WEIGHT);
4989 member->weight[afi][safi] = 0;
4990 peer_on_policy_change(member, afi, safi, 0);
d62a17ae 4991 }
598ce6bd 4992
d62a17ae 4993 return 0;
4994}
4995
d7c0a89a 4996int peer_timers_set(struct peer *peer, uint32_t keepalive, uint32_t holdtime)
d62a17ae 4997{
b90a8e13 4998 struct peer *member;
d62a17ae 4999 struct listnode *node, *nnode;
5000
d62a17ae 5001 if (keepalive > 65535)
5002 return BGP_ERR_INVALID_VALUE;
5003
d62a17ae 5004 if (holdtime > 65535)
5005 return BGP_ERR_INVALID_VALUE;
5006
d62a17ae 5007 if (holdtime < 3 && holdtime != 0)
5008 return BGP_ERR_INVALID_VALUE;
5009
b90a8e13
PM		 5010 /* Set flag and configuration on peer. */
5011 peer_flag_set(peer, PEER_FLAG_TIMER);
d62a17ae 5012 peer->holdtime = holdtime;
5013 peer->keepalive = (keepalive < holdtime / 3 ? keepalive : holdtime / 3);
5014
b90a8e13
PM		 5015 /* Skip peer-group mechanics for regular peers. */
5016 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP))
5017 return 0;
d25e4efc 5018
b90a8e13
PM		 5019 /*
5020 * Set flag and configuration on all peer-group members, unless they are
5021 * explicitely overriding peer-group configuration.
5022 */
5023 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5024 /* Skip peers with overridden configuration. */
5025 if (CHECK_FLAG(member->flags_override, PEER_FLAG_TIMER))
5026 continue;
d25e4efc 5027
b90a8e13
PM		 5028 /* Set flag and configuration on peer-group member. */
5029 SET_FLAG(member->flags, PEER_FLAG_TIMER);
5030 PEER_ATTR_INHERIT(peer, peer->group, holdtime);
5031 PEER_ATTR_INHERIT(peer, peer->group, keepalive);
d62a17ae 5032 }
d25e4efc 5033
d62a17ae 5034 return 0;
5035}
5036
5037int peer_timers_unset(struct peer *peer)
5038{
b90a8e13 5039 struct peer *member;
d62a17ae 5040 struct listnode *node, *nnode;
5041
b90a8e13
PM		 5042 /* Inherit configuration from peer-group if peer is member. */
5043 if (peer_group_active(peer)) {
5044 peer_flag_inherit(peer, PEER_FLAG_TIMER);
5045 PEER_ATTR_INHERIT(peer, peer->group, holdtime);
5046 PEER_ATTR_INHERIT(peer, peer->group, keepalive);
5047 } else {
5048 /* Otherwise remove flag and configuration from peer. */
5049 peer_flag_unset(peer, PEER_FLAG_TIMER);
d25e4efc 5050 peer->holdtime = 0;
b90a8e13
PM		 5051 peer->keepalive = 0;
5052 }
d25e4efc 5053
b90a8e13
PM		 5054 /* Skip peer-group mechanics for regular peers. */
5055 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP))
5056 return 0;
5057
5058 /*
5059 * Remove flag and configuration from all peer-group members, unless
5060 * they are explicitely overriding peer-group configuration.
5061 */
5062 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5063 /* Skip peers with overridden configuration. */
5064 if (CHECK_FLAG(member->flags_override, PEER_FLAG_TIMER))
5065 continue;
d25e4efc 5066
b90a8e13
PM		 5067 /* Remove flag and configuration on peer-group member. */
5068 UNSET_FLAG(member->flags, PEER_FLAG_TIMER);
5069 member->holdtime = 0;
5070 member->keepalive = 0;
d62a17ae 5071 }
5072
5073 return 0;
5074}
5075
d7c0a89a 5076int peer_timers_connect_set(struct peer *peer, uint32_t connect)
d62a17ae 5077{
b90a8e13 5078 struct peer *member;
d62a17ae 5079 struct listnode *node, *nnode;
5080
5081 if (connect > 65535)
5082 return BGP_ERR_INVALID_VALUE;
5083
b90a8e13
PM		 5084 /* Set flag and configuration on peer. */
5085 peer_flag_set(peer, PEER_FLAG_TIMER_CONNECT);
d62a17ae 5086 peer->connect = connect;
d62a17ae 5087 peer->v_connect = connect;
5088
b90a8e13 5089 /* Skip peer-group mechanics for regular peers. */
d62a17ae 5090 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP))
5091 return 0;
5092
b90a8e13
PM		 5093 /*
5094 * Set flag and configuration on all peer-group members, unless they are
5095 * explicitely overriding peer-group configuration.
5096 */
5097 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5098 /* Skip peers with overridden configuration. */
5099 if (CHECK_FLAG(member->flags_override, PEER_FLAG_TIMER_CONNECT))
5100 continue;
5101
5102 /* Set flag and configuration on peer-group member. */
5103 SET_FLAG(member->flags, PEER_FLAG_TIMER_CONNECT);
5104 member->connect = connect;
5105 member->v_connect = connect;
d62a17ae 5106 }
b90a8e13 5107
d62a17ae 5108 return 0;
5109}
5110
5111int peer_timers_connect_unset(struct peer *peer)
5112{
b90a8e13 5113 struct peer *member;
d62a17ae 5114 struct listnode *node, *nnode;
5115
b90a8e13
PM		 5116 /* Inherit configuration from peer-group if peer is member. */
5117 if (peer_group_active(peer)) {
5118 peer_flag_inherit(peer, PEER_FLAG_TIMER_CONNECT);
5119 PEER_ATTR_INHERIT(peer, peer->group, connect);
5120 } else {
5121 /* Otherwise remove flag and configuration from peer. */
5122 peer_flag_unset(peer, PEER_FLAG_TIMER_CONNECT);
5123 peer->connect = 0;
5124 }
d62a17ae 5125
b90a8e13
PM		 5126 /* Set timer with fallback to default value. */
5127 if (peer->connect)
5128 peer->v_connect = peer->connect;
5129 else
5d5393b9 5130 peer->v_connect = peer->bgp->default_connect_retry;
d62a17ae 5131
b90a8e13 5132 /* Skip peer-group mechanics for regular peers. */
d62a17ae 5133 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP))
5134 return 0;
5135
b90a8e13
PM		 5136 /*
5137 * Remove flag and configuration from all peer-group members, unless
5138 * they are explicitely overriding peer-group configuration.
5139 */
5140 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5141 /* Skip peers with overridden configuration. */
5142 if (CHECK_FLAG(member->flags_override, PEER_FLAG_TIMER_CONNECT))
5143 continue;
5144
5145 /* Remove flag and configuration on peer-group member. */
5146 UNSET_FLAG(member->flags, PEER_FLAG_TIMER_CONNECT);
5147 member->connect = 0;
5d5393b9 5148 member->v_connect = peer->bgp->default_connect_retry;
d62a17ae 5149 }
b90a8e13 5150
d62a17ae 5151 return 0;
5152}
5153
d7c0a89a 5154int peer_advertise_interval_set(struct peer *peer, uint32_t routeadv)
d62a17ae 5155{
b90a8e13 5156 struct peer *member;
d62a17ae 5157 struct listnode *node, *nnode;
5158
5159 if (routeadv > 600)
5160 return BGP_ERR_INVALID_VALUE;
5161
b90a8e13
PM		 5162 /* Set flag and configuration on peer. */
5163 peer_flag_set(peer, PEER_FLAG_ROUTEADV);
d62a17ae 5164 peer->routeadv = routeadv;
5165 peer->v_routeadv = routeadv;
5166
b90a8e13 5167 /* Check if handling a regular peer. */
d62a17ae 5168 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
b90a8e13 5169 /* Update peer route announcements. */
d62a17ae 5170 update_group_adjust_peer_afs(peer);
5171 if (peer->status == Established)
5172 bgp_announce_route_all(peer);
b90a8e13
PM		 5173
5174 /* Skip peer-group mechanics for regular peers. */
d62a17ae 5175 return 0;
5176 }
5177
b90a8e13
PM		 5178 /*
5179 * Set flag and configuration on all peer-group members, unless they are
5180 * explicitely overriding peer-group configuration.
5181 */
5182 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5183 /* Skip peers with overridden configuration. */
5184 if (CHECK_FLAG(member->flags_override, PEER_FLAG_ROUTEADV))
5185 continue;
5186
5187 /* Set flag and configuration on peer-group member. */
5188 SET_FLAG(member->flags, PEER_FLAG_ROUTEADV);
5189 member->routeadv = routeadv;
5190 member->v_routeadv = routeadv;
5191
5192 /* Update peer route announcements. */
5193 update_group_adjust_peer_afs(member);
5194 if (member->status == Established)
5195 bgp_announce_route_all(member);
d62a17ae 5196 }
5197
5198 return 0;
5199}
5200
5201int peer_advertise_interval_unset(struct peer *peer)
5202{
b90a8e13 5203 struct peer *member;
d62a17ae 5204 struct listnode *node, *nnode;
5205
b90a8e13
PM		 5206 /* Inherit configuration from peer-group if peer is member. */
5207 if (peer_group_active(peer)) {
5208 peer_flag_inherit(peer, PEER_FLAG_ROUTEADV);
5209 PEER_ATTR_INHERIT(peer, peer->group, routeadv);
5210 } else {
5211 /* Otherwise remove flag and configuration from peer. */
5212 peer_flag_unset(peer, PEER_FLAG_ROUTEADV);
5213 peer->routeadv = 0;
5214 }
d62a17ae 5215
b90a8e13
PM		 5216 /* Set timer with fallback to default value. */
5217 if (peer->routeadv)
5218 peer->v_routeadv = peer->routeadv;
d62a17ae 5219 else
b90a8e13
PM		 5220 peer->v_routeadv = (peer->sort == BGP_PEER_IBGP)
5221 ? BGP_DEFAULT_IBGP_ROUTEADV
5222 : BGP_DEFAULT_EBGP_ROUTEADV;
d62a17ae 5223
b90a8e13 5224 /* Check if handling a regular peer. */
d62a17ae 5225 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
b90a8e13 5226 /* Update peer route announcements. */
d62a17ae 5227 update_group_adjust_peer_afs(peer);
5228 if (peer->status == Established)
5229 bgp_announce_route_all(peer);
b90a8e13
PM		 5230
5231 /* Skip peer-group mechanics for regular peers. */
d62a17ae 5232 return 0;
5233 }
5234
b90a8e13
PM		 5235 /*
5236 * Remove flag and configuration from all peer-group members, unless
5237 * they are explicitely overriding peer-group configuration.
5238 */
5239 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5240 /* Skip peers with overridden configuration. */
5241 if (CHECK_FLAG(member->flags_override, PEER_FLAG_ROUTEADV))
5242 continue;
d62a17ae 5243
b90a8e13
PM		 5244 /* Remove flag and configuration on peer-group member. */
5245 UNSET_FLAG(member->flags, PEER_FLAG_ROUTEADV);
5246 member->routeadv = 0;
5247 member->v_routeadv = (member->sort == BGP_PEER_IBGP)
5248 ? BGP_DEFAULT_IBGP_ROUTEADV
5249 : BGP_DEFAULT_EBGP_ROUTEADV;
d62a17ae 5250
b90a8e13
PM		 5251 /* Update peer route announcements. */
5252 update_group_adjust_peer_afs(member);
5253 if (member->status == Established)
5254 bgp_announce_route_all(member);
d62a17ae 5255 }
5256
5257 return 0;
5258}
5259
5260/* neighbor interface */
5261void peer_interface_set(struct peer *peer, const char *str)
5262{
0a22ddfb 5263 XFREE(MTYPE_BGP_PEER_IFNAME, peer->ifname);
d62a17ae 5264 peer->ifname = XSTRDUP(MTYPE_BGP_PEER_IFNAME, str);
5265}
5266
5267void peer_interface_unset(struct peer *peer)
5268{
0a22ddfb 5269 XFREE(MTYPE_BGP_PEER_IFNAME, peer->ifname);
d62a17ae 5270}
5271
5272/* Allow-as in. */
5273int peer_allowas_in_set(struct peer *peer, afi_t afi, safi_t safi,
5274 int allow_num, int origin)
5275{
598ce6bd 5276 struct peer *member;
d62a17ae 5277 struct listnode *node, *nnode;
5278
598ce6bd
PM		 5279 if (!origin && (allow_num < 1 || allow_num > 10))
5280 return BGP_ERR_INVALID_VALUE;
5281
5282 /* Set flag and configuration on peer. */
5283 peer_af_flag_set(peer, afi, safi, PEER_FLAG_ALLOWAS_IN);
d62a17ae 5284 if (origin) {
598ce6bd 5285 if (peer->allowas_in[afi][safi] != 0
d62a17ae 5286 || !CHECK_FLAG(peer->af_flags[afi][safi],
5287 PEER_FLAG_ALLOWAS_IN_ORIGIN)) {
d62a17ae 5288 peer_af_flag_set(peer, afi, safi,
5289 PEER_FLAG_ALLOWAS_IN_ORIGIN);
598ce6bd 5290 peer->allowas_in[afi][safi] = 0;
d62a17ae 5291 peer_on_policy_change(peer, afi, safi, 0);
5292 }
d62a17ae 5293 } else {
d62a17ae 5294 if (peer->allowas_in[afi][safi] != allow_num
5295 || CHECK_FLAG(peer->af_flags[afi][safi],
5296 PEER_FLAG_ALLOWAS_IN_ORIGIN)) {
598ce6bd 5297
d62a17ae 5298 peer_af_flag_unset(peer, afi, safi,
5299 PEER_FLAG_ALLOWAS_IN_ORIGIN);
598ce6bd 5300 peer->allowas_in[afi][safi] = allow_num;
d62a17ae 5301 peer_on_policy_change(peer, afi, safi, 0);
5302 }
598ce6bd 5303 }
d62a17ae 5304
598ce6bd
PM		 5305 /* Skip peer-group mechanics for regular peers. */
5306 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP))
5307 return 0;
d62a17ae 5308
598ce6bd
PM		 5309 /*
5310 * Set flag and configuration on all peer-group members, unless
5311 * they are explicitely overriding peer-group configuration.
5312 */
5313 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5314 /* Skip peers with overridden configuration. */
5315 if (CHECK_FLAG(member->af_flags_override[afi][safi],
246bb5f0 5316 PEER_FLAG_ALLOWAS_IN))
598ce6bd
PM		 5317 continue;
5318
5319 /* Set flag and configuration on peer-group member. */
5320 SET_FLAG(member->af_flags[afi][safi], PEER_FLAG_ALLOWAS_IN);
5321 if (origin) {
5322 if (member->allowas_in[afi][safi] != 0
5323 || !CHECK_FLAG(member->af_flags[afi][safi],
cf9ac8bf 5324 PEER_FLAG_ALLOWAS_IN_ORIGIN)) {
598ce6bd 5325 SET_FLAG(member->af_flags[afi][safi],
cf9ac8bf 5326 PEER_FLAG_ALLOWAS_IN_ORIGIN);
598ce6bd
PM		 5327 member->allowas_in[afi][safi] = 0;
5328 peer_on_policy_change(peer, afi, safi, 0);
5329 }
5330 } else {
5331 if (member->allowas_in[afi][safi] != allow_num
5332 || CHECK_FLAG(member->af_flags[afi][safi],
d62a17ae 5333 PEER_FLAG_ALLOWAS_IN_ORIGIN)) {
598ce6bd
PM		 5334 UNSET_FLAG(member->af_flags[afi][safi],
5335 PEER_FLAG_ALLOWAS_IN_ORIGIN);
5336 member->allowas_in[afi][safi] = allow_num;
d62a17ae 5337 peer_on_policy_change(peer, afi, safi, 0);
5338 }
5339 }
5340 }
5341
5342 return 0;
5343}
5344
5345int peer_allowas_in_unset(struct peer *peer, afi_t afi, safi_t safi)
5346{
598ce6bd 5347 struct peer *member;
d62a17ae 5348 struct listnode *node, *nnode;
5349
598ce6bd
PM		 5350 /* Skip peer if flag is already disabled. */
5351 if (!CHECK_FLAG(peer->af_flags[afi][safi], PEER_FLAG_ALLOWAS_IN))
5352 return 0;
d62a17ae 5353
598ce6bd
PM		 5354 /* Inherit configuration from peer-group if peer is member. */
5355 if (peer_group_active(peer)) {
5356 peer_af_flag_inherit(peer, afi, safi, PEER_FLAG_ALLOWAS_IN);
5357 peer_af_flag_inherit(peer, afi, safi,
cf9ac8bf 5358 PEER_FLAG_ALLOWAS_IN_ORIGIN);
e7103a96 5359 PEER_ATTR_INHERIT(peer, peer->group, allowas_in[afi][safi]);
d62a17ae 5360 peer_on_policy_change(peer, afi, safi, 0);
598ce6bd
PM		 5361
5362 return 0;
5363 }
5364
5365 /* Remove flag and configuration from peer. */
5366 peer_af_flag_unset(peer, afi, safi, PEER_FLAG_ALLOWAS_IN);
5367 peer_af_flag_unset(peer, afi, safi, PEER_FLAG_ALLOWAS_IN_ORIGIN);
5368 peer->allowas_in[afi][safi] = 0;
5369 peer_on_policy_change(peer, afi, safi, 0);
5370
5371 /* Skip peer-group mechanics if handling a regular peer. */
5372 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP))
5373 return 0;
5374
5375 /*
5376 * Remove flags and configuration from all peer-group members, unless
5377 * they are explicitely overriding peer-group configuration.
5378 */
5379 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5380 /* Skip peers with overridden configuration. */
5381 if (CHECK_FLAG(member->af_flags_override[afi][safi],
cf9ac8bf 5382 PEER_FLAG_ALLOWAS_IN))
598ce6bd
PM		 5383 continue;
5384
5385 /* Skip peers where flag is already disabled. */
5386 if (!CHECK_FLAG(member->af_flags[afi][safi],
cf9ac8bf 5387 PEER_FLAG_ALLOWAS_IN))
598ce6bd
PM		 5388 continue;
5389
5390 /* Remove flags and configuration on peer-group member. */
cf9ac8bf 5391 UNSET_FLAG(member->af_flags[afi][safi], PEER_FLAG_ALLOWAS_IN);
598ce6bd 5392 UNSET_FLAG(member->af_flags[afi][safi],
cf9ac8bf 5393 PEER_FLAG_ALLOWAS_IN_ORIGIN);
598ce6bd
PM		 5394 member->allowas_in[afi][safi] = 0;
5395 peer_on_policy_change(member, afi, safi, 0);
d62a17ae 5396 }
5397
5398 return 0;
5399}
5400
5401int peer_local_as_set(struct peer *peer, as_t as, int no_prepend,
5402 int replace_as)
5403{
a14810f4 5404 bool old_no_prepend, old_replace_as;
d62a17ae 5405 struct bgp *bgp = peer->bgp;
a14810f4 5406 struct peer *member;
d62a17ae 5407 struct listnode *node, *nnode;
469cbb0f 5408 bgp_peer_sort_t ptype = peer_sort(peer);
d62a17ae 5409
469cbb0f 5410 if (ptype != BGP_PEER_EBGP && ptype != BGP_PEER_INTERNAL)
d62a17ae 5411 return BGP_ERR_LOCAL_AS_ALLOWED_ONLY_FOR_EBGP;
5412
5413 if (bgp->as == as)
5414 return BGP_ERR_CANNOT_HAVE_LOCAL_AS_SAME_AS;
5415
5416 if (peer->as == as)
5417 return BGP_ERR_CANNOT_HAVE_LOCAL_AS_SAME_AS_REMOTE_AS;
5418
a14810f4
PM		 5419 /* Save previous flag states. */
5420 old_no_prepend =
5421 !!CHECK_FLAG(peer->flags, PEER_FLAG_LOCAL_AS_NO_PREPEND);
5422 old_replace_as =
5423 !!CHECK_FLAG(peer->flags, PEER_FLAG_LOCAL_AS_REPLACE_AS);
d62a17ae 5424
a14810f4
PM		 5425 /* Set flag and configuration on peer. */
5426 peer_flag_set(peer, PEER_FLAG_LOCAL_AS);
5427 peer_flag_modify(peer, PEER_FLAG_LOCAL_AS_NO_PREPEND, no_prepend);
5428 peer_flag_modify(peer, PEER_FLAG_LOCAL_AS_REPLACE_AS, replace_as);
d62a17ae 5429
a14810f4
PM		 5430 if (peer->change_local_as == as && old_no_prepend == no_prepend
5431 && old_replace_as == replace_as)
5432 return 0;
5433 peer->change_local_as = as;
d62a17ae 5434
a14810f4 5435 /* Check if handling a regular peer. */
d62a17ae 5436 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
a14810f4 5437 /* Send notification or reset peer depending on state. */
d62a17ae 5438 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status)) {
5439 peer->last_reset = PEER_DOWN_LOCAL_AS_CHANGE;
5440 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
5441 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
5442 } else
5443 bgp_session_reset(peer);
a14810f4
PM		 5444
5445 /* Skip peer-group mechanics for regular peers. */
d62a17ae 5446 return 0;
5447 }
5448
a14810f4
PM		 5449 /*
5450 * Set flag and configuration on all peer-group members, unless they are
5451 * explicitely overriding peer-group configuration.
5452 */
5453 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5454 /* Skip peers with overridden configuration. */
5455 if (CHECK_FLAG(member->flags_override, PEER_FLAG_LOCAL_AS))
5456 continue;
d62a17ae 5457
a14810f4
PM		 5458 /* Skip peers with the same configuration. */
5459 old_no_prepend = CHECK_FLAG(member->flags,
5460 PEER_FLAG_LOCAL_AS_NO_PREPEND);
5461 old_replace_as = CHECK_FLAG(member->flags,
5462 PEER_FLAG_LOCAL_AS_REPLACE_AS);
5463 if (member->change_local_as == as
5464 && CHECK_FLAG(member->flags, PEER_FLAG_LOCAL_AS)
5465 && old_no_prepend == no_prepend
5466 && old_replace_as == replace_as)
5467 continue;
d62a17ae 5468
a14810f4
PM		 5469 /* Set flag and configuration on peer-group member. */
5470 SET_FLAG(member->flags, PEER_FLAG_LOCAL_AS);
5471 COND_FLAG(member->flags, PEER_FLAG_LOCAL_AS_NO_PREPEND,
5472 no_prepend);
5473 COND_FLAG(member->flags, PEER_FLAG_LOCAL_AS_REPLACE_AS,
5474 replace_as);
5475 member->change_local_as = as;
5476
5477 /* Send notification or stop peer depending on state. */
5478 if (BGP_IS_VALID_STATE_FOR_NOTIF(member->status)) {
5479 member->last_reset = PEER_DOWN_LOCAL_AS_CHANGE;
5480 bgp_notify_send(member, BGP_NOTIFY_CEASE,
d62a17ae 5481 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
5482 } else
a14810f4 5483 BGP_EVENT_ADD(member, BGP_Stop);
d62a17ae 5484 }
5485
5486 return 0;
5487}
5488
5489int peer_local_as_unset(struct peer *peer)
5490{
a14810f4 5491 struct peer *member;
d62a17ae 5492 struct listnode *node, *nnode;
5493
a14810f4 5494 if (!CHECK_FLAG(peer->flags, PEER_FLAG_LOCAL_AS))
d62a17ae 5495 return 0;
5496
a14810f4
PM		 5497 /* Inherit configuration from peer-group if peer is member. */
5498 if (peer_group_active(peer)) {
5499 peer_flag_inherit(peer, PEER_FLAG_LOCAL_AS);
5500 peer_flag_inherit(peer, PEER_FLAG_LOCAL_AS_NO_PREPEND);
5501 peer_flag_inherit(peer, PEER_FLAG_LOCAL_AS_REPLACE_AS);
5502 PEER_ATTR_INHERIT(peer, peer->group, change_local_as);
5503 } else {
5504 /* Otherwise remove flag and configuration from peer. */
5505 peer_flag_unset(peer, PEER_FLAG_LOCAL_AS);
5506 peer_flag_unset(peer, PEER_FLAG_LOCAL_AS_NO_PREPEND);
5507 peer_flag_unset(peer, PEER_FLAG_LOCAL_AS_REPLACE_AS);
5508 peer->change_local_as = 0;
5509 }
d62a17ae 5510
a14810f4 5511 /* Check if handling a regular peer. */
d62a17ae 5512 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
a14810f4 5513 /* Send notification or stop peer depending on state. */
d62a17ae 5514 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status)) {
5515 peer->last_reset = PEER_DOWN_LOCAL_AS_CHANGE;
5516 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
5517 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
5518 } else
5519 BGP_EVENT_ADD(peer, BGP_Stop);
5520
a14810f4 5521 /* Skip peer-group mechanics for regular peers. */
d62a17ae 5522 return 0;
5523 }
5524
a14810f4
PM		 5525 /*
5526 * Remove flag and configuration from all peer-group members, unless
5527 * they are explicitely overriding peer-group configuration.
5528 */
5529 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5530 /* Skip peers with overridden configuration. */
5531 if (CHECK_FLAG(member->flags_override, PEER_FLAG_LOCAL_AS))
5532 continue;
d62a17ae 5533
a14810f4
PM		 5534 /* Remove flag and configuration on peer-group member. */
5535 UNSET_FLAG(member->flags, PEER_FLAG_LOCAL_AS);
5536 UNSET_FLAG(member->flags, PEER_FLAG_LOCAL_AS_NO_PREPEND);
5537 UNSET_FLAG(member->flags, PEER_FLAG_LOCAL_AS_REPLACE_AS);
5538 member->change_local_as = 0;
5539
5540 /* Send notification or stop peer depending on state. */
5541 if (BGP_IS_VALID_STATE_FOR_NOTIF(member->status)) {
5542 member->last_reset = PEER_DOWN_LOCAL_AS_CHANGE;
5543 bgp_notify_send(member, BGP_NOTIFY_CEASE,
d62a17ae 5544 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
5545 } else
a14810f4 5546 bgp_session_reset(member);
d62a17ae 5547 }
a14810f4 5548
d62a17ae 5549 return 0;
5550}
5551
5552/* Set password for authenticating with the peer. */
5553int peer_password_set(struct peer *peer, const char *password)
5554{
a14810f4
PM		 5555 struct peer *member;
5556 struct listnode *node, *nnode;
d62a17ae 5557 int len = password ? strlen(password) : 0;
5558 int ret = BGP_SUCCESS;
5559
5560 if ((len < PEER_PASSWORD_MINLEN) || (len > PEER_PASSWORD_MAXLEN))
5561 return BGP_ERR_INVALID_VALUE;
5562
a14810f4
PM		 5563 /* Set flag and configuration on peer. */
5564 peer_flag_set(peer, PEER_FLAG_PASSWORD);
5565 if (peer->password && strcmp(peer->password, password) == 0)
d62a17ae 5566 return 0;
a14810f4 5567 XFREE(MTYPE_PEER_PASSWORD, peer->password);
d62a17ae 5568 peer->password = XSTRDUP(MTYPE_PEER_PASSWORD, password);
5569
a14810f4 5570 /* Check if handling a regular peer. */
d62a17ae 5571 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
a14810f4 5572 /* Send notification or reset peer depending on state. */
d62a17ae 5573 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status))
5574 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
5575 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
5576 else
5577 bgp_session_reset(peer);
5578
a14810f4
PM		 5579 /*
5580 * Attempt to install password on socket and skip peer-group
5581 * mechanics.
5582 */
d62a17ae 5583 if (BGP_PEER_SU_UNSPEC(peer))
5584 return BGP_SUCCESS;
d62a17ae 5585 return (bgp_md5_set(peer) >= 0) ? BGP_SUCCESS
5586 : BGP_ERR_TCPSIG_FAILED;
5587 }
5588
a14810f4
PM		 5589 /*
5590 * Set flag and configuration on all peer-group members, unless they are
5591 * explicitely overriding peer-group configuration.
5592 */
5593 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5594 /* Skip peers with overridden configuration. */
5595 if (CHECK_FLAG(member->flags_override, PEER_FLAG_PASSWORD))
d62a17ae 5596 continue;
5597
a14810f4
PM		 5598 /* Skip peers with the same password. */
5599 if (member->password && strcmp(member->password, password) == 0)
5600 continue;
d62a17ae 5601
a14810f4
PM		 5602 /* Set flag and configuration on peer-group member. */
5603 SET_FLAG(member->flags, PEER_FLAG_PASSWORD);
5604 if (member->password)
5605 XFREE(MTYPE_PEER_PASSWORD, member->password);
5606 member->password = XSTRDUP(MTYPE_PEER_PASSWORD, password);
5607
5608 /* Send notification or reset peer depending on state. */
5609 if (BGP_IS_VALID_STATE_FOR_NOTIF(member->status))
5610 bgp_notify_send(member, BGP_NOTIFY_CEASE,
d62a17ae 5611 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
5612 else
a14810f4 5613 bgp_session_reset(member);
d62a17ae 5614
a14810f4
PM		 5615 /* Attempt to install password on socket. */
5616 if (!BGP_PEER_SU_UNSPEC(member) && bgp_md5_set(member) < 0)
5617 ret = BGP_ERR_TCPSIG_FAILED;
d62a17ae 5618 }
5619
9e7d9a61
QY		 5620 /* Set flag and configuration on all peer-group listen ranges */
5621 struct listnode *ln;
5622 struct prefix *lr;
5623
5624 for (ALL_LIST_ELEMENTS_RO(peer->group->listen_range[AFI_IP], ln, lr))
5625 bgp_md5_set_prefix(lr, password);
5626 for (ALL_LIST_ELEMENTS_RO(peer->group->listen_range[AFI_IP6], ln, lr))
5627 bgp_md5_set_prefix(lr, password);
5628
d62a17ae 5629 return ret;
5630}
5631
5632int peer_password_unset(struct peer *peer)
5633{
a14810f4
PM		 5634 struct peer *member;
5635 struct listnode *node, *nnode;
d62a17ae 5636
a14810f4 5637 if (!CHECK_FLAG(peer->flags, PEER_FLAG_PASSWORD))
d62a17ae 5638 return 0;
5639
a14810f4
PM		 5640 /* Inherit configuration from peer-group if peer is member. */
5641 if (peer_group_active(peer)) {
5642 peer_flag_inherit(peer, PEER_FLAG_PASSWORD);
5643 PEER_STR_ATTR_INHERIT(peer, peer->group, password,
5644 MTYPE_PEER_PASSWORD);
5645 } else {
5646 /* Otherwise remove flag and configuration from peer. */
5647 peer_flag_unset(peer, PEER_FLAG_PASSWORD);
5648 XFREE(MTYPE_PEER_PASSWORD, peer->password);
5649 }
5650
5651 /* Check if handling a regular peer. */
d62a17ae 5652 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
a14810f4 5653 /* Send notification or reset peer depending on state. */
d62a17ae 5654 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status))
5655 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
5656 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
5657 else
5658 bgp_session_reset(peer);
5659
a14810f4 5660 /* Attempt to uninstall password on socket. */
d62a17ae 5661 if (!BGP_PEER_SU_UNSPEC(peer))
5662 bgp_md5_unset(peer);
5663
a14810f4 5664 /* Skip peer-group mechanics for regular peers. */
d62a17ae 5665 return 0;
5666 }
5667
a14810f4
PM		 5668 /*
5669 * Remove flag and configuration from all peer-group members, unless
5670 * they are explicitely overriding peer-group configuration.
5671 */
5672 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5673 /* Skip peers with overridden configuration. */
5674 if (CHECK_FLAG(member->flags_override, PEER_FLAG_PASSWORD))
d62a17ae 5675 continue;
5676
a14810f4
PM		 5677 /* Remove flag and configuration on peer-group member. */
5678 UNSET_FLAG(member->flags, PEER_FLAG_PASSWORD);
5679 XFREE(MTYPE_PEER_PASSWORD, member->password);
5680
5681 /* Send notification or reset peer depending on state. */
5682 if (BGP_IS_VALID_STATE_FOR_NOTIF(member->status))
5683 bgp_notify_send(member, BGP_NOTIFY_CEASE,
d62a17ae 5684 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
5685 else
a14810f4 5686 bgp_session_reset(member);
d62a17ae 5687
a14810f4
PM		 5688 /* Attempt to uninstall password on socket. */
5689 if (!BGP_PEER_SU_UNSPEC(member))
5690 bgp_md5_unset(member);
d62a17ae 5691 }
5692
9e7d9a61
QY		 5693 /* Set flag and configuration on all peer-group listen ranges */
5694 struct listnode *ln;
5695 struct prefix *lr;
5696
5697 for (ALL_LIST_ELEMENTS_RO(peer->group->listen_range[AFI_IP], ln, lr))
5698 bgp_md5_unset_prefix(lr);
5699 for (ALL_LIST_ELEMENTS_RO(peer->group->listen_range[AFI_IP6], ln, lr))
5700 bgp_md5_unset_prefix(lr);
5701
d62a17ae 5702 return 0;
5703}
6b0655a2 5704
3f9c7369 5705
718e3744 5706/* Set distribute list to the peer. */
d62a17ae 5707int peer_distribute_set(struct peer *peer, afi_t afi, safi_t safi, int direct,
5708 const char *name)
5709{
70ee29b4 5710 struct peer *member;
d62a17ae 5711 struct bgp_filter *filter;
d62a17ae 5712 struct listnode *node, *nnode;
5713
5714 if (direct != FILTER_IN && direct != FILTER_OUT)
5715 return BGP_ERR_INVALID_VALUE;
5716
70ee29b4 5717 /* Set configuration on peer. */
d62a17ae 5718 filter = &peer->filter[afi][safi];
d62a17ae 5719 if (filter->plist[direct].name)
5720 return BGP_ERR_PEER_FILTER_CONFLICT;
d62a17ae 5721 if (filter->dlist[direct].name)
5722 XFREE(MTYPE_BGP_FILTER_NAME, filter->dlist[direct].name);
5723 filter->dlist[direct].name = XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
5724 filter->dlist[direct].alist = access_list_lookup(afi, name);
5725
70ee29b4 5726 /* Check if handling a regular peer. */
d62a17ae 5727 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
70ee29b4
PM		 5728 /* Set override-flag and process peer route updates. */
5729 SET_FLAG(peer->filter_override[afi][safi][direct],
5730 PEER_FT_DISTRIBUTE_LIST);
d62a17ae 5731 peer_on_policy_change(peer, afi, safi,
5732 (direct == FILTER_OUT) ? 1 : 0);
70ee29b4
PM		 5733
5734 /* Skip peer-group mechanics for regular peers. */
d62a17ae 5735 return 0;
5736 }
5737
70ee29b4
PM		 5738 /*
5739 * Set configuration on all peer-group members, un less they are
5740 * explicitely overriding peer-group configuration.
5741 */
5742 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5743 /* Skip peers with overridden configuration. */
5744 if (CHECK_FLAG(member->filter_override[afi][safi][direct],
5745 PEER_FT_DISTRIBUTE_LIST))
5746 continue;
d62a17ae 5747
70ee29b4
PM		 5748 /* Set configuration on peer-group member. */
5749 filter = &member->filter[afi][safi];
d62a17ae 5750 if (filter->dlist[direct].name)
5751 XFREE(MTYPE_BGP_FILTER_NAME,
5752 filter->dlist[direct].name);
5753 filter->dlist[direct].name =
5754 XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
5755 filter->dlist[direct].alist = access_list_lookup(afi, name);
70ee29b4
PM		 5756
5757 /* Process peer route updates. */
5758 peer_on_policy_change(member, afi, safi,
d62a17ae 5759 (direct == FILTER_OUT) ? 1 : 0);
5760 }
5761
5762 return 0;
5763}
5764
5765int peer_distribute_unset(struct peer *peer, afi_t afi, safi_t safi, int direct)
5766{
70ee29b4 5767 struct peer *member;
d62a17ae 5768 struct bgp_filter *filter;
d62a17ae 5769 struct listnode *node, *nnode;
5770
5771 if (direct != FILTER_IN && direct != FILTER_OUT)
5772 return BGP_ERR_INVALID_VALUE;
5773
70ee29b4
PM		 5774 /* Unset override-flag unconditionally. */
5775 UNSET_FLAG(peer->filter_override[afi][safi][direct],
5776 PEER_FT_DISTRIBUTE_LIST);
d62a17ae 5777
70ee29b4 5778 /* Inherit configuration from peer-group if peer is member. */
d62a17ae 5779 if (peer_group_active(peer)) {
e7103a96
PM		 5780 PEER_STR_ATTR_INHERIT(peer, peer->group,
5781 filter[afi][safi].dlist[direct].name,
5782 MTYPE_BGP_FILTER_NAME);
5783 PEER_ATTR_INHERIT(peer, peer->group,
5784 filter[afi][safi].dlist[direct].alist);
70ee29b4
PM		 5785 } else {
5786 /* Otherwise remove configuration from peer. */
5787 filter = &peer->filter[afi][safi];
5788 if (filter->dlist[direct].name)
5789 XFREE(MTYPE_BGP_FILTER_NAME,
5790 filter->dlist[direct].name);
5791 filter->dlist[direct].name = NULL;
5792 filter->dlist[direct].alist = NULL;
d62a17ae 5793 }
5794
70ee29b4 5795 /* Check if handling a regular peer. */
d62a17ae 5796 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
70ee29b4 5797 /* Process peer route updates. */
d62a17ae 5798 peer_on_policy_change(peer, afi, safi,
5799 (direct == FILTER_OUT) ? 1 : 0);
70ee29b4
PM		 5800
5801 /* Skip peer-group mechanics for regular peers. */
d62a17ae 5802 return 0;
5803 }
5804
70ee29b4
PM		 5805 /*
5806 * Remove configuration on all peer-group members, unless they are
5807 * explicitely overriding peer-group configuration.
5808 */
5809 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5810 /* Skip peers with overridden configuration. */
5811 if (CHECK_FLAG(member->filter_override[afi][safi][direct],
5812 PEER_FT_DISTRIBUTE_LIST))
5813 continue;
d62a17ae 5814
70ee29b4
PM		 5815 /* Remove configuration on peer-group member. */
5816 filter = &member->filter[afi][safi];
d62a17ae 5817 if (filter->dlist[direct].name)
5818 XFREE(MTYPE_BGP_FILTER_NAME,
5819 filter->dlist[direct].name);
5820 filter->dlist[direct].name = NULL;
5821 filter->dlist[direct].alist = NULL;
70ee29b4
PM		 5822
5823 /* Process peer route updates. */
5824 peer_on_policy_change(member, afi, safi,
d62a17ae 5825 (direct == FILTER_OUT) ? 1 : 0);
5826 }
5827
5828 return 0;
5829}
5830
5831/* Update distribute list. */
5832static void peer_distribute_update(struct access_list *access)
5833{
5834 afi_t afi;
5835 safi_t safi;
5836 int direct;
5837 struct listnode *mnode, *mnnode;
5838 struct listnode *node, *nnode;
5839 struct bgp *bgp;
5840 struct peer *peer;
5841 struct peer_group *group;
5842 struct bgp_filter *filter;
5843
5844 for (ALL_LIST_ELEMENTS(bm->bgp, mnode, mnnode, bgp)) {
5845 if (access->name)
5846 update_group_policy_update(bgp, BGP_POLICY_FILTER_LIST,
5847 access->name, 0, 0);
5848 for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) {
05c7a1cc
QY		 5849 FOREACH_AFI_SAFI (afi, safi) {
5850 filter = &peer->filter[afi][safi];
5851
5852 for (direct = FILTER_IN; direct < FILTER_MAX;
5853 direct++) {
5854 if (filter->dlist[direct].name)
5855 filter->dlist[direct]
5856 .alist = access_list_lookup(
5857 afi,
d62a17ae 5858 filter->dlist[direct]
05c7a1cc
QY		 5859 .name);
5860 else
5861 filter->dlist[direct].alist =
5862 NULL;
d62a17ae 5863 }
05c7a1cc 5864 }
d62a17ae 5865 }
5866 for (ALL_LIST_ELEMENTS(bgp->group, node, nnode, group)) {
05c7a1cc
QY		 5867 FOREACH_AFI_SAFI (afi, safi) {
5868 filter = &group->conf->filter[afi][safi];
5869
5870 for (direct = FILTER_IN; direct < FILTER_MAX;
5871 direct++) {
5872 if (filter->dlist[direct].name)
5873 filter->dlist[direct]
5874 .alist = access_list_lookup(
5875 afi,
d62a17ae 5876 filter->dlist[direct]
05c7a1cc
QY		 5877 .name);
5878 else
5879 filter->dlist[direct].alist =
5880 NULL;
d62a17ae 5881 }
05c7a1cc 5882 }
d62a17ae 5883 }
49e5a4a0 5884#ifdef ENABLE_BGP_VNC
d62a17ae 5885 vnc_prefix_list_update(bgp);
5886#endif
5887 }
5888}
5889
5890/* Set prefix list to the peer. */
5891int peer_prefix_list_set(struct peer *peer, afi_t afi, safi_t safi, int direct,
5892 const char *name)
5893{
70ee29b4 5894 struct peer *member;
d62a17ae 5895 struct bgp_filter *filter;
d62a17ae 5896 struct listnode *node, *nnode;
5897
5898 if (direct != FILTER_IN && direct != FILTER_OUT)
5899 return BGP_ERR_INVALID_VALUE;
5900
70ee29b4 5901 /* Set configuration on peer. */
d62a17ae 5902 filter = &peer->filter[afi][safi];
d62a17ae 5903 if (filter->dlist[direct].name)
5904 return BGP_ERR_PEER_FILTER_CONFLICT;
d62a17ae 5905 if (filter->plist[direct].name)
5906 XFREE(MTYPE_BGP_FILTER_NAME, filter->plist[direct].name);
5907 filter->plist[direct].name = XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
5908 filter->plist[direct].plist = prefix_list_lookup(afi, name);
5909
70ee29b4 5910 /* Check if handling a regular peer. */
d62a17ae 5911 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
70ee29b4
PM		 5912 /* Set override-flag and process peer route updates. */
5913 SET_FLAG(peer->filter_override[afi][safi][direct],
5914 PEER_FT_PREFIX_LIST);
d62a17ae 5915 peer_on_policy_change(peer, afi, safi,
5916 (direct == FILTER_OUT) ? 1 : 0);
70ee29b4
PM		 5917
5918 /* Skip peer-group mechanics for regular peers. */
d62a17ae 5919 return 0;
5920 }
5921
70ee29b4
PM		 5922 /*
5923 * Set configuration on all peer-group members, unless they are
5924 * explicitely overriding peer-group configuration.
5925 */
5926 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5927 /* Skip peers with overridden configuration. */
5928 if (CHECK_FLAG(member->filter_override[afi][safi][direct],
5929 PEER_FT_PREFIX_LIST))
5930 continue;
d62a17ae 5931
70ee29b4
PM		 5932 /* Set configuration on peer-group member. */
5933 filter = &member->filter[afi][safi];
d62a17ae 5934 if (filter->plist[direct].name)
5935 XFREE(MTYPE_BGP_FILTER_NAME,
5936 filter->plist[direct].name);
5937 filter->plist[direct].name =
5938 XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
5939 filter->plist[direct].plist = prefix_list_lookup(afi, name);
70ee29b4
PM		 5940
5941 /* Process peer route updates. */
5942 peer_on_policy_change(member, afi, safi,
d62a17ae 5943 (direct == FILTER_OUT) ? 1 : 0);
5944 }
70ee29b4 5945
d62a17ae 5946 return 0;
5947}
5948
5949int peer_prefix_list_unset(struct peer *peer, afi_t afi, safi_t safi,
5950 int direct)
5951{
70ee29b4 5952 struct peer *member;
d62a17ae 5953 struct bgp_filter *filter;
d62a17ae 5954 struct listnode *node, *nnode;
5955
5956 if (direct != FILTER_IN && direct != FILTER_OUT)
5957 return BGP_ERR_INVALID_VALUE;
5958
70ee29b4
PM		 5959 /* Unset override-flag unconditionally. */
5960 UNSET_FLAG(peer->filter_override[afi][safi][direct],
5961 PEER_FT_PREFIX_LIST);
d62a17ae 5962
70ee29b4 5963 /* Inherit configuration from peer-group if peer is member. */
d62a17ae 5964 if (peer_group_active(peer)) {
e7103a96
PM		 5965 PEER_STR_ATTR_INHERIT(peer, peer->group,
5966 filter[afi][safi].plist[direct].name,
5967 MTYPE_BGP_FILTER_NAME);
5968 PEER_ATTR_INHERIT(peer, peer->group,
5969 filter[afi][safi].plist[direct].plist);
70ee29b4
PM		 5970 } else {
5971 /* Otherwise remove configuration from peer. */
5972 filter = &peer->filter[afi][safi];
5973 if (filter->plist[direct].name)
5974 XFREE(MTYPE_BGP_FILTER_NAME,
5975 filter->plist[direct].name);
5976 filter->plist[direct].name = NULL;
5977 filter->plist[direct].plist = NULL;
d62a17ae 5978 }
5979
70ee29b4 5980 /* Check if handling a regular peer. */
d62a17ae 5981 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
70ee29b4 5982 /* Process peer route updates. */
d62a17ae 5983 peer_on_policy_change(peer, afi, safi,
5984 (direct == FILTER_OUT) ? 1 : 0);
70ee29b4
PM		 5985
5986 /* Skip peer-group mechanics for regular peers. */
d62a17ae 5987 return 0;
5988 }
5989
70ee29b4
PM		 5990 /*
5991 * Remove configuration on all peer-group members, unless they are
5992 * explicitely overriding peer-group configuration.
5993 */
5994 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5995 /* Skip peers with overridden configuration. */
5996 if (CHECK_FLAG(member->filter_override[afi][safi][direct],
5997 PEER_FT_PREFIX_LIST))
5998 continue;
d62a17ae 5999
70ee29b4
PM		 6000 /* Remove configuration on peer-group member. */
6001 filter = &member->filter[afi][safi];
d62a17ae 6002 if (filter->plist[direct].name)
6003 XFREE(MTYPE_BGP_FILTER_NAME,
6004 filter->plist[direct].name);
6005 filter->plist[direct].name = NULL;
6006 filter->plist[direct].plist = NULL;
70ee29b4
PM		 6007
6008 /* Process peer route updates. */
6009 peer_on_policy_change(member, afi, safi,
d62a17ae 6010 (direct == FILTER_OUT) ? 1 : 0);
6011 }
6012
6013 return 0;
6014}
6015
6016/* Update prefix-list list. */
6017static void peer_prefix_list_update(struct prefix_list *plist)
6018{
6019 struct listnode *mnode, *mnnode;
6020 struct listnode *node, *nnode;
6021 struct bgp *bgp;
6022 struct peer *peer;
6023 struct peer_group *group;
6024 struct bgp_filter *filter;
6025 afi_t afi;
6026 safi_t safi;
6027 int direct;
6028
6029 for (ALL_LIST_ELEMENTS(bm->bgp, mnode, mnnode, bgp)) {
6030
6031 /*
6032 * Update the prefix-list on update groups.
6033 */
6034 update_group_policy_update(
6035 bgp, BGP_POLICY_PREFIX_LIST,
6036 plist ? prefix_list_name(plist) : NULL, 0, 0);
6037
6038 for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) {
05c7a1cc
QY		 6039 FOREACH_AFI_SAFI (afi, safi) {
6040 filter = &peer->filter[afi][safi];
6041
6042 for (direct = FILTER_IN; direct < FILTER_MAX;
6043 direct++) {
6044 if (filter->plist[direct].name)
6045 filter->plist[direct]
6046 .plist = prefix_list_lookup(
6047 afi,
d62a17ae 6048 filter->plist[direct]
05c7a1cc
QY		 6049 .name);
6050 else
6051 filter->plist[direct].plist =
6052 NULL;
d62a17ae 6053 }
05c7a1cc 6054 }
d62a17ae 6055 }
6056 for (ALL_LIST_ELEMENTS(bgp->group, node, nnode, group)) {
05c7a1cc
QY		 6057 FOREACH_AFI_SAFI (afi, safi) {
6058 filter = &group->conf->filter[afi][safi];
6059
6060 for (direct = FILTER_IN; direct < FILTER_MAX;
6061 direct++) {
6062 if (filter->plist[direct].name)
6063 filter->plist[direct]
6064 .plist = prefix_list_lookup(
6065 afi,
d62a17ae 6066 filter->plist[direct]
05c7a1cc
QY		 6067 .name);
6068 else
6069 filter->plist[direct].plist =
6070 NULL;
d62a17ae 6071 }
05c7a1cc 6072 }
d62a17ae 6073 }
6074 }
6075}
6076
6077int peer_aslist_set(struct peer *peer, afi_t afi, safi_t safi, int direct,
6078 const char *name)
6079{
70ee29b4 6080 struct peer *member;
d62a17ae 6081 struct bgp_filter *filter;
d62a17ae 6082 struct listnode *node, *nnode;
6083
6084 if (direct != FILTER_IN && direct != FILTER_OUT)
6085 return BGP_ERR_INVALID_VALUE;
6086
70ee29b4 6087 /* Set configuration on peer. */
d62a17ae 6088 filter = &peer->filter[afi][safi];
d62a17ae 6089 if (filter->aslist[direct].name)
6090 XFREE(MTYPE_BGP_FILTER_NAME, filter->aslist[direct].name);
6091 filter->aslist[direct].name = XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
6092 filter->aslist[direct].aslist = as_list_lookup(name);
6093
70ee29b4 6094 /* Check if handling a regular peer. */
d62a17ae 6095 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
70ee29b4
PM		 6096 /* Set override-flag and process peer route updates. */
6097 SET_FLAG(peer->filter_override[afi][safi][direct],
6098 PEER_FT_FILTER_LIST);
d62a17ae 6099 peer_on_policy_change(peer, afi, safi,
6100 (direct == FILTER_OUT) ? 1 : 0);
70ee29b4
PM		 6101
6102 /* Skip peer-group mechanics for regular peers. */
d62a17ae 6103 return 0;
6104 }
6105
70ee29b4
PM		 6106 /*
6107 * Set configuration on all peer-group members, unless they are
6108 * explicitely overriding peer-group configuration.
6109 */
6110 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
6111 /* Skip peers with overridden configuration. */
6112 if (CHECK_FLAG(member->filter_override[afi][safi][direct],
6113 PEER_FT_FILTER_LIST))
6114 continue;
d62a17ae 6115
70ee29b4
PM		 6116 /* Set configuration on peer-group member. */
6117 filter = &member->filter[afi][safi];
d62a17ae 6118 if (filter->aslist[direct].name)
6119 XFREE(MTYPE_BGP_FILTER_NAME,
6120 filter->aslist[direct].name);
6121 filter->aslist[direct].name =
6122 XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
6123 filter->aslist[direct].aslist = as_list_lookup(name);
70ee29b4
PM		 6124
6125 /* Process peer route updates. */
6126 peer_on_policy_change(member, afi, safi,
d62a17ae 6127 (direct == FILTER_OUT) ? 1 : 0);
6128 }
70ee29b4 6129
d62a17ae 6130 return 0;
6131}
6132
6133int peer_aslist_unset(struct peer *peer, afi_t afi, safi_t safi, int direct)
6134{
70ee29b4 6135 struct peer *member;
d62a17ae 6136 struct bgp_filter *filter;
d62a17ae 6137 struct listnode *node, *nnode;
6138
6139 if (direct != FILTER_IN && direct != FILTER_OUT)
6140 return BGP_ERR_INVALID_VALUE;
6141
70ee29b4
PM		 6142 /* Unset override-flag unconditionally. */
6143 UNSET_FLAG(peer->filter_override[afi][safi][direct],
6144 PEER_FT_FILTER_LIST);
d62a17ae 6145
70ee29b4 6146 /* Inherit configuration from peer-group if peer is member. */
d62a17ae 6147 if (peer_group_active(peer)) {
e7103a96
PM		 6148 PEER_STR_ATTR_INHERIT(peer, peer->group,
6149 filter[afi][safi].aslist[direct].name,
6150 MTYPE_BGP_FILTER_NAME);
6151 PEER_ATTR_INHERIT(peer, peer->group,
70ee29b4
PM		 6152 filter[afi][safi].aslist[direct].aslist);
6153 } else {
6154 /* Otherwise remove configuration from peer. */
6155 filter = &peer->filter[afi][safi];
6156 if (filter->aslist[direct].name)
6157 XFREE(MTYPE_BGP_FILTER_NAME,
6158 filter->aslist[direct].name);
6159 filter->aslist[direct].name = NULL;
6160 filter->aslist[direct].aslist = NULL;
d62a17ae 6161 }
6162
70ee29b4 6163 /* Check if handling a regular peer. */
d62a17ae 6164 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
70ee29b4 6165 /* Process peer route updates. */
d62a17ae 6166 peer_on_policy_change(peer, afi, safi,
6167 (direct == FILTER_OUT) ? 1 : 0);
70ee29b4
PM		 6168
6169 /* Skip peer-group mechanics for regular peers. */
d62a17ae 6170 return 0;
6171 }
6172
70ee29b4
PM		 6173 /*
6174 * Remove configuration on all peer-group members, unless they are
6175 * explicitely overriding peer-group configuration.
6176 */
6177 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
6178 /* Skip peers with overridden configuration. */
6179 if (CHECK_FLAG(member->filter_override[afi][safi][direct],
6180 PEER_FT_FILTER_LIST))
6181 continue;
d62a17ae 6182
70ee29b4
PM		 6183 /* Remove configuration on peer-group member. */
6184 filter = &member->filter[afi][safi];
d62a17ae 6185 if (filter->aslist[direct].name)
6186 XFREE(MTYPE_BGP_FILTER_NAME,
6187 filter->aslist[direct].name);
6188 filter->aslist[direct].name = NULL;
6189 filter->aslist[direct].aslist = NULL;
70ee29b4
PM		 6190
6191 /* Process peer route updates. */
6192 peer_on_policy_change(member, afi, safi,
d62a17ae 6193 (direct == FILTER_OUT) ? 1 : 0);
6194 }
6195
6196 return 0;
6197}
6198
6199static void peer_aslist_update(const char *aslist_name)
6200{
6201 afi_t afi;
6202 safi_t safi;
6203 int direct;
6204 struct listnode *mnode, *mnnode;
6205 struct listnode *node, *nnode;
6206 struct bgp *bgp;
6207 struct peer *peer;
6208 struct peer_group *group;
6209 struct bgp_filter *filter;
6210
6211 for (ALL_LIST_ELEMENTS(bm->bgp, mnode, mnnode, bgp)) {
6212 update_group_policy_update(bgp, BGP_POLICY_FILTER_LIST,
6213 aslist_name, 0, 0);
6214
6215 for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) {
05c7a1cc
QY		 6216 FOREACH_AFI_SAFI (afi, safi) {
6217 filter = &peer->filter[afi][safi];
6218
6219 for (direct = FILTER_IN; direct < FILTER_MAX;
6220 direct++) {
6221 if (filter->aslist[direct].name)
6222 filter->aslist[direct]
6223 .aslist = as_list_lookup(
d62a17ae 6224 filter->aslist[direct]
05c7a1cc
QY		 6225 .name);
6226 else
6227 filter->aslist[direct].aslist =
6228 NULL;
d62a17ae 6229 }
05c7a1cc 6230 }
d62a17ae 6231 }
6232 for (ALL_LIST_ELEMENTS(bgp->group, node, nnode, group)) {
05c7a1cc
QY		 6233 FOREACH_AFI_SAFI (afi, safi) {
6234 filter = &group->conf->filter[afi][safi];
6235
6236 for (direct = FILTER_IN; direct < FILTER_MAX;
6237 direct++) {
6238 if (filter->aslist[direct].name)
6239 filter->aslist[direct]
6240 .aslist = as_list_lookup(
d62a17ae 6241 filter->aslist[direct]
05c7a1cc
QY		 6242 .name);
6243 else
6244 filter->aslist[direct].aslist =
6245 NULL;
d62a17ae 6246 }
05c7a1cc 6247 }
d62a17ae 6248 }
6249 }
6250}
6251
6252static void peer_aslist_add(char *aslist_name)
6253{
6254 peer_aslist_update(aslist_name);
c4efd0f4 6255 route_map_notify_dependencies(aslist_name, RMAP_EVENT_ASLIST_ADDED);
d62a17ae 6256}
6257
6258static void peer_aslist_del(const char *aslist_name)
6259{
6260 peer_aslist_update(aslist_name);
6261 route_map_notify_dependencies(aslist_name, RMAP_EVENT_ASLIST_DELETED);
6262}
6263
6264
6265int peer_route_map_set(struct peer *peer, afi_t afi, safi_t safi, int direct,
1de27621 6266 const char *name, struct route_map *route_map)
d62a17ae 6267{
70ee29b4 6268 struct peer *member;
d62a17ae 6269 struct bgp_filter *filter;
d62a17ae 6270 struct listnode *node, *nnode;
6271
6272 if (direct != RMAP_IN && direct != RMAP_OUT)
6273 return BGP_ERR_INVALID_VALUE;
6274
70ee29b4 6275 /* Set configuration on peer. */
d62a17ae 6276 filter = &peer->filter[afi][safi];
6c3247bd
NT		 6277 if (filter->map[direct].name) {
6278 /* If the neighbor is configured with the same route-map
6279 * again then, ignore the duplicate configuration.
6280 */
6281 if (strcmp(filter->map[direct].name, name) == 0)
6282 return 0;
6283
d62a17ae 6284 XFREE(MTYPE_BGP_FILTER_NAME, filter->map[direct].name);
6c3247bd 6285 }
b4897fa5 6286 route_map_counter_decrement(filter->map[direct].map);
d62a17ae 6287 filter->map[direct].name = XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
1de27621 6288 filter->map[direct].map = route_map;
b4897fa5 6289 route_map_counter_increment(route_map);
d62a17ae 6290
70ee29b4 6291 /* Check if handling a regular peer. */
d62a17ae 6292 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
70ee29b4
PM		 6293 /* Set override-flag and process peer route updates. */
6294 SET_FLAG(peer->filter_override[afi][safi][direct],
6295 PEER_FT_ROUTE_MAP);
d62a17ae 6296 peer_on_policy_change(peer, afi, safi,
6297 (direct == RMAP_OUT) ? 1 : 0);
70ee29b4
PM		 6298
6299 /* Skip peer-group mechanics for regular peers. */
d62a17ae 6300 return 0;
6301 }
6302
70ee29b4
PM		 6303 /*
6304 * Set configuration on all peer-group members, unless they are
6305 * explicitely overriding peer-group configuration.
6306 */
6307 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
6308 /* Skip peers with overridden configuration. */
6309 if (CHECK_FLAG(member->filter_override[afi][safi][direct],
6310 PEER_FT_ROUTE_MAP))
6311 continue;
d62a17ae 6312
70ee29b4
PM		 6313 /* Set configuration on peer-group member. */
6314 filter = &member->filter[afi][safi];
d62a17ae 6315 if (filter->map[direct].name)
6316 XFREE(MTYPE_BGP_FILTER_NAME, filter->map[direct].name);
b4897fa5 6317 route_map_counter_decrement(filter->map[direct].map);
d62a17ae 6318 filter->map[direct].name = XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
1de27621 6319 filter->map[direct].map = route_map;
b4897fa5 6320 route_map_counter_increment(route_map);
70ee29b4
PM		 6321
6322 /* Process peer route updates. */
6323 peer_on_policy_change(member, afi, safi,
d62a17ae 6324 (direct == RMAP_OUT) ? 1 : 0);
6325 }
6326 return 0;
6327}
6328
6329/* Unset route-map from the peer. */
6330int peer_route_map_unset(struct peer *peer, afi_t afi, safi_t safi, int direct)
6331{
70ee29b4 6332 struct peer *member;
d62a17ae 6333 struct bgp_filter *filter;
d62a17ae 6334 struct listnode *node, *nnode;
6335
6336 if (direct != RMAP_IN && direct != RMAP_OUT)
6337 return BGP_ERR_INVALID_VALUE;
6338
70ee29b4
PM		 6339 /* Unset override-flag unconditionally. */
6340 UNSET_FLAG(peer->filter_override[afi][safi][direct], PEER_FT_ROUTE_MAP);
d62a17ae 6341
70ee29b4 6342 /* Inherit configuration from peer-group if peer is member. */
d62a17ae 6343 if (peer_group_active(peer)) {
e7103a96
PM		 6344 PEER_STR_ATTR_INHERIT(peer, peer->group,
6345 filter[afi][safi].map[direct].name,
6346 MTYPE_BGP_FILTER_NAME);
6347 PEER_ATTR_INHERIT(peer, peer->group,
6348 filter[afi][safi].map[direct].map);
70ee29b4
PM		 6349 } else {
6350 /* Otherwise remove configuration from peer. */
6351 filter = &peer->filter[afi][safi];
6352 if (filter->map[direct].name)
6353 XFREE(MTYPE_BGP_FILTER_NAME, filter->map[direct].name);
b4897fa5 6354 route_map_counter_decrement(filter->map[direct].map);
70ee29b4
PM		 6355 filter->map[direct].name = NULL;
6356 filter->map[direct].map = NULL;
d62a17ae 6357 }
6358
70ee29b4 6359 /* Check if handling a regular peer. */
d62a17ae 6360 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
70ee29b4 6361 /* Process peer route updates. */
d62a17ae 6362 peer_on_policy_change(peer, afi, safi,
6363 (direct == RMAP_OUT) ? 1 : 0);
70ee29b4
PM		 6364
6365 /* Skip peer-group mechanics for regular peers. */
d62a17ae 6366 return 0;
6367 }
6368
70ee29b4
PM		 6369 /*
6370 * Remove configuration on all peer-group members, unless they are
6371 * explicitely overriding peer-group configuration.
6372 */
6373 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
6374 /* Skip peers with overridden configuration. */
6375 if (CHECK_FLAG(member->filter_override[afi][safi][direct],
6376 PEER_FT_ROUTE_MAP))
6377 continue;
d62a17ae 6378
70ee29b4
PM		 6379 /* Remove configuration on peer-group member. */
6380 filter = &member->filter[afi][safi];
d62a17ae 6381 if (filter->map[direct].name)
6382 XFREE(MTYPE_BGP_FILTER_NAME, filter->map[direct].name);
b4897fa5 6383 route_map_counter_decrement(filter->map[direct].map);
d62a17ae 6384 filter->map[direct].name = NULL;
6385 filter->map[direct].map = NULL;
70ee29b4
PM		 6386
6387 /* Process peer route updates. */
6388 peer_on_policy_change(member, afi, safi,
d62a17ae 6389 (direct == RMAP_OUT) ? 1 : 0);
6390 }
70ee29b4 6391
d62a17ae 6392 return 0;
6393}
6394
6395/* Set unsuppress-map to the peer. */
6396int peer_unsuppress_map_set(struct peer *peer, afi_t afi, safi_t safi,
1de27621 6397 const char *name, struct route_map *route_map)
d62a17ae 6398{
70ee29b4 6399 struct peer *member;
d62a17ae 6400 struct bgp_filter *filter;
d62a17ae 6401 struct listnode *node, *nnode;
6402
70ee29b4 6403 /* Set configuration on peer. */
d62a17ae 6404 filter = &peer->filter[afi][safi];
d62a17ae 6405 if (filter->usmap.name)
6406 XFREE(MTYPE_BGP_FILTER_NAME, filter->usmap.name);
b4897fa5 6407 route_map_counter_decrement(filter->usmap.map);
d62a17ae 6408 filter->usmap.name = XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
1de27621 6409 filter->usmap.map = route_map;
b4897fa5 6410 route_map_counter_increment(route_map);
d62a17ae 6411
70ee29b4 6412 /* Check if handling a regular peer. */
d62a17ae 6413 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
70ee29b4
PM		 6414 /* Set override-flag and process peer route updates. */
6415 SET_FLAG(peer->filter_override[afi][safi][0],
6416 PEER_FT_UNSUPPRESS_MAP);
d62a17ae 6417 peer_on_policy_change(peer, afi, safi, 1);
70ee29b4
PM		 6418
6419 /* Skip peer-group mechanics for regular peers. */
d62a17ae 6420 return 0;
6421 }
6422
70ee29b4
PM		 6423 /*
6424 * Set configuration on all peer-group members, unless they are
6425 * explicitely overriding peer-group configuration.
6426 */
6427 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
6428 /* Skip peers with overridden configuration. */
246bb5f0 6429 if (CHECK_FLAG(member->filter_override[afi][safi][0],
70ee29b4
PM		 6430 PEER_FT_UNSUPPRESS_MAP))
6431 continue;
d62a17ae 6432
70ee29b4
PM		 6433 /* Set configuration on peer-group member. */
6434 filter = &member->filter[afi][safi];
d62a17ae 6435 if (filter->usmap.name)
6436 XFREE(MTYPE_BGP_FILTER_NAME, filter->usmap.name);
b4897fa5 6437 route_map_counter_decrement(filter->usmap.map);
d62a17ae 6438 filter->usmap.name = XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
1de27621 6439 filter->usmap.map = route_map;
b4897fa5 6440 route_map_counter_increment(route_map);
70ee29b4
PM		 6441
6442 /* Process peer route updates. */
6443 peer_on_policy_change(member, afi, safi, 1);
d62a17ae 6444 }
70ee29b4 6445
d62a17ae 6446 return 0;
6447}
6448
6449/* Unset route-map from the peer. */
6450int peer_unsuppress_map_unset(struct peer *peer, afi_t afi, safi_t safi)
718e3744 6451{
70ee29b4 6452 struct peer *member;
d62a17ae 6453 struct bgp_filter *filter;
d62a17ae 6454 struct listnode *node, *nnode;
6455
70ee29b4
PM		 6456 /* Unset override-flag unconditionally. */
6457 UNSET_FLAG(peer->filter_override[afi][safi][0], PEER_FT_UNSUPPRESS_MAP);
718e3744 6458
70ee29b4
PM		 6459 /* Inherit configuration from peer-group if peer is member. */
6460 if (peer_group_active(peer)) {
e7103a96
PM		 6461 PEER_STR_ATTR_INHERIT(peer, peer->group,
6462 filter[afi][safi].usmap.name,
6463 MTYPE_BGP_FILTER_NAME);
6464 PEER_ATTR_INHERIT(peer, peer->group,
6465 filter[afi][safi].usmap.map);
70ee29b4
PM		 6466 } else {
6467 /* Otherwise remove configuration from peer. */
6468 filter = &peer->filter[afi][safi];
6469 if (filter->usmap.name)
6470 XFREE(MTYPE_BGP_FILTER_NAME, filter->usmap.name);
b4897fa5 6471 route_map_counter_decrement(filter->usmap.map);
70ee29b4
PM		 6472 filter->usmap.name = NULL;
6473 filter->usmap.map = NULL;
6474 }
718e3744 6475
70ee29b4 6476 /* Check if handling a regular peer. */
d62a17ae 6477 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
70ee29b4 6478 /* Process peer route updates. */
d62a17ae 6479 peer_on_policy_change(peer, afi, safi, 1);
70ee29b4
PM		 6480
6481 /* Skip peer-group mechanics for regular peers. */
d62a17ae 6482 return 0;
6483 }
718e3744 6484
70ee29b4
PM		 6485 /*
6486 * Remove configuration on all peer-group members, unless they are
6487 * explicitely overriding peer-group configuration.
6488 */
6489 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
6490 /* Skip peers with overridden configuration. */
6491 if (CHECK_FLAG(member->filter_override[afi][safi][0],
6492 PEER_FT_UNSUPPRESS_MAP))
6493 continue;
718e3744 6494
70ee29b4
PM		 6495 /* Remove configuration on peer-group member. */
6496 filter = &member->filter[afi][safi];
d62a17ae 6497 if (filter->usmap.name)
6498 XFREE(MTYPE_BGP_FILTER_NAME, filter->usmap.name);
b4897fa5 6499 route_map_counter_decrement(filter->usmap.map);
d62a17ae 6500 filter->usmap.name = NULL;
6501 filter->usmap.map = NULL;
70ee29b4
PM		 6502
6503 /* Process peer route updates. */
6504 peer_on_policy_change(member, afi, safi, 1);
d62a17ae 6505 }
70ee29b4 6506
d62a17ae 6507 return 0;
6508}
718e3744 6509
d62a17ae 6510int peer_maximum_prefix_set(struct peer *peer, afi_t afi, safi_t safi,
d7c0a89a 6511 uint32_t max, uint8_t threshold, int warning,
9cbd06e0 6512 uint16_t restart, bool force)
d62a17ae 6513{
598ce6bd 6514 struct peer *member;
d62a17ae 6515 struct listnode *node, *nnode;
6516
598ce6bd
PM		 6517 /* Set flags and configuration on peer. */
6518 peer_af_flag_set(peer, afi, safi, PEER_FLAG_MAX_PREFIX);
9cbd06e0
DA		 6519
6520 if (force)
6521 peer_af_flag_set(peer, afi, safi, PEER_FLAG_MAX_PREFIX_FORCE);
6522 else
6523 peer_af_flag_unset(peer, afi, safi, PEER_FLAG_MAX_PREFIX_FORCE);
6524
d62a17ae 6525 if (warning)
598ce6bd 6526 peer_af_flag_set(peer, afi, safi, PEER_FLAG_MAX_PREFIX_WARNING);
d62a17ae 6527 else
598ce6bd
PM		 6528 peer_af_flag_unset(peer, afi, safi,
6529 PEER_FLAG_MAX_PREFIX_WARNING);
6530
04e1c5bb
QY		 6531 peer->pmax[afi][safi] = max;
6532 peer->pmax_threshold[afi][safi] = threshold;
6533 peer->pmax_restart[afi][safi] = restart;
d62a17ae 6534
598ce6bd
PM		 6535 /* Check if handling a regular peer. */
6536 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6537 /* Re-check if peer violates maximum-prefix. */
d62a17ae 6538 if ((peer->status == Established) && (peer->afc[afi][safi]))
6539 bgp_maximum_prefix_overflow(peer, afi, safi, 1);
04e1c5bb 6540
598ce6bd
PM		 6541 /* Skip peer-group mechanics for regular peers. */
6542 return 0;
6543 }
04e1c5bb 6544
598ce6bd
PM		 6545 /*
6546 * Set flags and configuration on all peer-group members, unless they
6547 * are explicitely overriding peer-group configuration.
6548 */
6549 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
6550 /* Skip peers with overridden configuration. */
6551 if (CHECK_FLAG(member->af_flags_override[afi][safi],
6552 PEER_FLAG_MAX_PREFIX))
6553 continue;
04e1c5bb 6554
598ce6bd
PM		 6555 /* Set flag and configuration on peer-group member. */
6556 member->pmax[afi][safi] = max;
6557 member->pmax_threshold[afi][safi] = threshold;
6558 member->pmax_restart[afi][safi] = restart;
9cbd06e0
DA		 6559
6560 if (force)
6561 SET_FLAG(member->af_flags[afi][safi],
6562 PEER_FLAG_MAX_PREFIX_FORCE);
6563 else
6564 UNSET_FLAG(member->af_flags[afi][safi],
6565 PEER_FLAG_MAX_PREFIX_FORCE);
6566
04e1c5bb 6567 if (warning)
598ce6bd 6568 SET_FLAG(member->af_flags[afi][safi],
04e1c5bb
QY		 6569 PEER_FLAG_MAX_PREFIX_WARNING);
6570 else
598ce6bd 6571 UNSET_FLAG(member->af_flags[afi][safi],
04e1c5bb 6572 PEER_FLAG_MAX_PREFIX_WARNING);
598ce6bd
PM		 6573
6574 /* Re-check if peer violates maximum-prefix. */
6575 if ((member->status == Established) && (member->afc[afi][safi]))
6576 bgp_maximum_prefix_overflow(member, afi, safi, 1);
d62a17ae 6577 }
718e3744 6578
d62a17ae 6579 return 0;
6580}
718e3744 6581
d62a17ae 6582int peer_maximum_prefix_unset(struct peer *peer, afi_t afi, safi_t safi)
6583{
598ce6bd
PM		 6584 /* Inherit configuration from peer-group if peer is member. */
6585 if (peer_group_active(peer)) {
6586 peer_af_flag_inherit(peer, afi, safi, PEER_FLAG_MAX_PREFIX);
9cbd06e0
DA		 6587 peer_af_flag_inherit(peer, afi, safi,
6588 PEER_FLAG_MAX_PREFIX_FORCE);
598ce6bd
PM		 6589 peer_af_flag_inherit(peer, afi, safi,
6590 PEER_FLAG_MAX_PREFIX_WARNING);
e7103a96
PM		 6591 PEER_ATTR_INHERIT(peer, peer->group, pmax[afi][safi]);
6592 PEER_ATTR_INHERIT(peer, peer->group, pmax_threshold[afi][safi]);
6593 PEER_ATTR_INHERIT(peer, peer->group, pmax_restart[afi][safi]);
04e1c5bb 6594
d62a17ae 6595 return 0;
04e1c5bb 6596 }
d62a17ae 6597
598ce6bd
PM		 6598 /* Remove flags and configuration from peer. */
6599 peer_af_flag_unset(peer, afi, safi, PEER_FLAG_MAX_PREFIX);
9cbd06e0 6600 peer_af_flag_unset(peer, afi, safi, PEER_FLAG_MAX_PREFIX_FORCE);
598ce6bd
PM		 6601 peer_af_flag_unset(peer, afi, safi, PEER_FLAG_MAX_PREFIX_WARNING);
6602 peer->pmax[afi][safi] = 0;
6603 peer->pmax_threshold[afi][safi] = 0;
6604 peer->pmax_restart[afi][safi] = 0;
6605
04e1c5bb 6606 /*
598ce6bd
PM		 6607 * Remove flags and configuration from all peer-group members, unless
6608 * they are explicitely overriding peer-group configuration.
04e1c5bb 6609 */
6282637d
RW		 6610 if (CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6611 struct peer *member;
6612 struct listnode *node;
598ce6bd 6613
6282637d
RW		 6614 for (ALL_LIST_ELEMENTS_RO(peer->group->peer, node, member)) {
6615 /* Skip peers with overridden configuration. */
6616 if (CHECK_FLAG(member->af_flags_override[afi][safi],
6617 PEER_FLAG_MAX_PREFIX))
6618 continue;
6619
6620 /* Remove flag and configuration on peer-group member.
6621 */
6622 UNSET_FLAG(member->af_flags[afi][safi],
6623 PEER_FLAG_MAX_PREFIX);
9cbd06e0
DA		 6624 UNSET_FLAG(member->af_flags[afi][safi],
6625 PEER_FLAG_MAX_PREFIX_FORCE);
6282637d
RW		 6626 UNSET_FLAG(member->af_flags[afi][safi],
6627 PEER_FLAG_MAX_PREFIX_WARNING);
6628 member->pmax[afi][safi] = 0;
6629 member->pmax_threshold[afi][safi] = 0;
6630 member->pmax_restart[afi][safi] = 0;
6631 }
d62a17ae 6632 }
598ce6bd 6633
d62a17ae 6634 return 0;
718e3744 6635}
6636
d62a17ae 6637int is_ebgp_multihop_configured(struct peer *peer)
718e3744 6638{
d62a17ae 6639 struct peer_group *group;
6640 struct listnode *node, *nnode;
6641 struct peer *peer1;
718e3744 6642
d62a17ae 6643 if (CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6644 group = peer->group;
6645 if ((peer_sort(peer) != BGP_PEER_IBGP)
c8d6f0d6 6646 && (group->conf->ttl != BGP_DEFAULT_TTL))
d62a17ae 6647 return 1;
718e3744 6648
d62a17ae 6649 for (ALL_LIST_ELEMENTS(group->peer, node, nnode, peer1)) {
6650 if ((peer_sort(peer1) != BGP_PEER_IBGP)
c8d6f0d6 6651 && (peer1->ttl != BGP_DEFAULT_TTL))
d62a17ae 6652 return 1;
6653 }
6654 } else {
c8d6f0d6
DA		 6655 if ((peer_sort(peer) != BGP_PEER_IBGP)
6656 && (peer->ttl != BGP_DEFAULT_TTL))
d62a17ae 6657 return 1;
6658 }
6659 return 0;
6660}
718e3744 6661
d62a17ae 6662/* Set # of hops between us and BGP peer. */
6663int peer_ttl_security_hops_set(struct peer *peer, int gtsm_hops)
6664{
6665 struct peer_group *group;
6666 struct listnode *node, *nnode;
6667 int ret;
6668
6669 zlog_debug("peer_ttl_security_hops_set: set gtsm_hops to %d for %s",
6670 gtsm_hops, peer->host);
6671
6672 /* We cannot configure ttl-security hops when ebgp-multihop is already
6673 set. For non peer-groups, the check is simple. For peer-groups,
6674 it's
6675 slightly messy, because we need to check both the peer-group
6676 structure
6677 and all peer-group members for any trace of ebgp-multihop
6678 configuration
6679 before actually applying the ttl-security rules. Cisco really made a
6680 mess of this configuration parameter, and OpenBGPD got it right.
6681 */
6682
e2521429
DA		 6683 if ((peer->gtsm_hops == BGP_GTSM_HOPS_DISABLED)
6684 && (peer->sort != BGP_PEER_IBGP)) {
d62a17ae 6685 if (is_ebgp_multihop_configured(peer))
6686 return BGP_ERR_NO_EBGP_MULTIHOP_WITH_TTLHACK;
6687
6688 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6689 peer->gtsm_hops = gtsm_hops;
6690
6691 /* Calling ebgp multihop also resets the session.
6692 * On restart, NHT will get setup correctly as will the
6693 * min & max ttls on the socket. The return value is
6694 * irrelevant.
6695 */
6696 ret = peer_ebgp_multihop_set(peer, MAXTTL);
6697
6698 if (ret != 0)
6699 return ret;
6700 } else {
6701 group = peer->group;
6702 for (ALL_LIST_ELEMENTS(group->peer, node, nnode,
6703 peer)) {
6704 peer->gtsm_hops = group->conf->gtsm_hops;
6705
6706 /* Calling ebgp multihop also resets the
6707 * session.
6708 * On restart, NHT will get setup correctly as
6709 * will the
6710 * min & max ttls on the socket. The return
6711 * value is
6712 * irrelevant.
6713 */
6714 peer_ebgp_multihop_set(peer, MAXTTL);
6715 }
6716 }
6717 } else {
6718 /* Post the first gtsm setup or if its ibgp, maxttl setting
6719 * isn't
6720 * necessary, just set the minttl.
6721 */
6722 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6723 peer->gtsm_hops = gtsm_hops;
6724
6725 if (peer->fd >= 0)
6726 sockopt_minttl(peer->su.sa.sa_family, peer->fd,
6727 MAXTTL + 1 - gtsm_hops);
6728 if ((peer->status < Established) && peer->doppelganger
6729 && (peer->doppelganger->fd >= 0))
6730 sockopt_minttl(peer->su.sa.sa_family,
6731 peer->doppelganger->fd,
6732 MAXTTL + 1 - gtsm_hops);
6733 } else {
6734 group = peer->group;
6735 for (ALL_LIST_ELEMENTS(group->peer, node, nnode,
6736 peer)) {
6737 peer->gtsm_hops = group->conf->gtsm_hops;
6738
6739 /* Change setting of existing peer
6740 * established then change value (may break
6741 * connectivity)
6742 * not established yet (teardown session and
6743 * restart)
6744 * no session then do nothing (will get
6745 * handled by next connection)
6746 */
e2521429
DA		 6747 if (peer->fd >= 0
6748 && peer->gtsm_hops
6749 != BGP_GTSM_HOPS_DISABLED)
d62a17ae 6750 sockopt_minttl(
6751 peer->su.sa.sa_family, peer->fd,
6752 MAXTTL + 1 - peer->gtsm_hops);
6753 if ((peer->status < Established)
6754 && peer->doppelganger
6755 && (peer->doppelganger->fd >= 0))
6756 sockopt_minttl(peer->su.sa.sa_family,
6757 peer->doppelganger->fd,
6758 MAXTTL + 1 - gtsm_hops);
6759 }
6760 }
6761 }
718e3744 6762
d62a17ae 6763 return 0;
718e3744 6764}
6765
d62a17ae 6766int peer_ttl_security_hops_unset(struct peer *peer)
6767{
6768 struct peer_group *group;
6769 struct listnode *node, *nnode;
6770 int ret = 0;
6771
6772 zlog_debug("peer_ttl_security_hops_unset: set gtsm_hops to zero for %s",
6773 peer->host);
6774
6775 /* if a peer-group member, then reset to peer-group default rather than
6776 * 0 */
6777 if (peer_group_active(peer))
6778 peer->gtsm_hops = peer->group->conf->gtsm_hops;
6779 else
e2521429 6780 peer->gtsm_hops = BGP_GTSM_HOPS_DISABLED;
d62a17ae 6781
6782 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6783 /* Invoking ebgp_multihop_set will set the TTL back to the
6784 * original
6785 * value as well as restting the NHT and such. The session is
6786 * reset.
6787 */
6788 if (peer->sort == BGP_PEER_EBGP)
6789 ret = peer_ebgp_multihop_unset(peer);
6790 else {
6791 if (peer->fd >= 0)
6792 sockopt_minttl(peer->su.sa.sa_family, peer->fd,
6793 0);
6794
6795 if ((peer->status < Established) && peer->doppelganger
6796 && (peer->doppelganger->fd >= 0))
6797 sockopt_minttl(peer->su.sa.sa_family,
6798 peer->doppelganger->fd, 0);
6799 }
6800 } else {
6801 group = peer->group;
6802 for (ALL_LIST_ELEMENTS(group->peer, node, nnode, peer)) {
e2521429 6803 peer->gtsm_hops = BGP_GTSM_HOPS_DISABLED;
d62a17ae 6804 if (peer->sort == BGP_PEER_EBGP)
6805 ret = peer_ebgp_multihop_unset(peer);
6806 else {
6807 if (peer->fd >= 0)
6808 sockopt_minttl(peer->su.sa.sa_family,
6809 peer->fd, 0);
6810
6811 if ((peer->status < Established)
6812 && peer->doppelganger
6813 && (peer->doppelganger->fd >= 0))
6814 sockopt_minttl(peer->su.sa.sa_family,
6815 peer->doppelganger->fd,
6816 0);
6817 }
6818 }
6819 }
718e3744 6820
d62a17ae 6821 return ret;
6822}
6823
6824/*
6825 * If peer clear is invoked in a loop for all peers on the BGP instance,
6826 * it may end up freeing the doppelganger, and if this was the next node
6827 * to the current node, we would end up accessing the freed next node.
6828 * Pass along additional parameter which can be updated if next node
6829 * is freed; only required when walking the peer list on BGP instance.
6830 */
6831int peer_clear(struct peer *peer, struct listnode **nnode)
6832{
cb9196e7
DS		 6833 if (!CHECK_FLAG(peer->flags, PEER_FLAG_SHUTDOWN)
6834 || !CHECK_FLAG(peer->bgp->flags, BGP_FLAG_SHUTDOWN)) {
d62a17ae 6835 if (CHECK_FLAG(peer->sflags, PEER_STATUS_PREFIX_OVERFLOW)) {
6836 UNSET_FLAG(peer->sflags, PEER_STATUS_PREFIX_OVERFLOW);
6837 if (peer->t_pmax_restart) {
6838 BGP_TIMER_OFF(peer->t_pmax_restart);
6839 if (bgp_debug_neighbor_events(peer))
6840 zlog_debug(
6841 "%s Maximum-prefix restart timer canceled",
6842 peer->host);
6843 }
6844 BGP_EVENT_ADD(peer, BGP_Start);
6845 return 0;
6846 }
6847
6848 peer->v_start = BGP_INIT_START_TIMER;
6849 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status))
6850 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
6851 BGP_NOTIFY_CEASE_ADMIN_RESET);
6852 else
6853 bgp_session_reset_safe(peer, nnode);
718e3744 6854 }
d62a17ae 6855 return 0;
718e3744 6856}
6b0655a2 6857
d62a17ae 6858int peer_clear_soft(struct peer *peer, afi_t afi, safi_t safi,
6859 enum bgp_clear_type stype)
718e3744 6860{
d62a17ae 6861 struct peer_af *paf;
718e3744 6862
d62a17ae 6863 if (peer->status != Established)
6864 return 0;
718e3744 6865
d62a17ae 6866 if (!peer->afc[afi][safi])
6867 return BGP_ERR_AF_UNCONFIGURED;
718e3744 6868
d62a17ae 6869 peer->rtt = sockopt_tcp_rtt(peer->fd);
718e3744 6870
d62a17ae 6871 if (stype == BGP_CLEAR_SOFT_OUT || stype == BGP_CLEAR_SOFT_BOTH) {
6872 /* Clear the "neighbor x.x.x.x default-originate" flag */
6873 paf = peer_af_find(peer, afi, safi);
6874 if (paf && paf->subgroup
6875 && CHECK_FLAG(paf->subgroup->sflags,
6876 SUBGRP_STATUS_DEFAULT_ORIGINATE))
6877 UNSET_FLAG(paf->subgroup->sflags,
6878 SUBGRP_STATUS_DEFAULT_ORIGINATE);
718e3744 6879
d62a17ae 6880 bgp_announce_route(peer, afi, safi);
6881 }
718e3744 6882
d62a17ae 6883 if (stype == BGP_CLEAR_SOFT_IN_ORF_PREFIX) {
6884 if (CHECK_FLAG(peer->af_cap[afi][safi],
6885 PEER_CAP_ORF_PREFIX_SM_ADV)
6886 && (CHECK_FLAG(peer->af_cap[afi][safi],
6887 PEER_CAP_ORF_PREFIX_RM_RCV)
6888 || CHECK_FLAG(peer->af_cap[afi][safi],
6889 PEER_CAP_ORF_PREFIX_RM_OLD_RCV))) {
6890 struct bgp_filter *filter = &peer->filter[afi][safi];
d7c0a89a 6891 uint8_t prefix_type;
d62a17ae 6892
6893 if (CHECK_FLAG(peer->af_cap[afi][safi],
6894 PEER_CAP_ORF_PREFIX_RM_RCV))
6895 prefix_type = ORF_TYPE_PREFIX;
6896 else
6897 prefix_type = ORF_TYPE_PREFIX_OLD;
6898
6899 if (filter->plist[FILTER_IN].plist) {
6900 if (CHECK_FLAG(peer->af_sflags[afi][safi],
6901 PEER_STATUS_ORF_PREFIX_SEND))
6902 bgp_route_refresh_send(
6903 peer, afi, safi, prefix_type,
6904 REFRESH_DEFER, 1);
6905 bgp_route_refresh_send(peer, afi, safi,
6906 prefix_type,
6907 REFRESH_IMMEDIATE, 0);
6908 } else {
6909 if (CHECK_FLAG(peer->af_sflags[afi][safi],
6910 PEER_STATUS_ORF_PREFIX_SEND))
6911 bgp_route_refresh_send(
6912 peer, afi, safi, prefix_type,
6913 REFRESH_IMMEDIATE, 1);
6914 else
6915 bgp_route_refresh_send(peer, afi, safi,
6916 0, 0, 0);
6917 }
6918 return 0;
6919 }
6920 }
718e3744 6921
d62a17ae 6922 if (stype == BGP_CLEAR_SOFT_IN || stype == BGP_CLEAR_SOFT_BOTH
6923 || stype == BGP_CLEAR_SOFT_IN_ORF_PREFIX) {
6924 /* If neighbor has soft reconfiguration inbound flag.
6925 Use Adj-RIB-In database. */
6926 if (CHECK_FLAG(peer->af_flags[afi][safi],
6927 PEER_FLAG_SOFT_RECONFIG))
6928 bgp_soft_reconfig_in(peer, afi, safi);
6929 else {
6930 /* If neighbor has route refresh capability, send route
6931 refresh
6932 message to the peer. */
6933 if (CHECK_FLAG(peer->cap, PEER_CAP_REFRESH_OLD_RCV)
6934 || CHECK_FLAG(peer->cap, PEER_CAP_REFRESH_NEW_RCV))
6935 bgp_route_refresh_send(peer, afi, safi, 0, 0,
6936 0);
6937 else
6938 return BGP_ERR_SOFT_RECONFIG_UNCONFIGURED;
6939 }
6940 }
6941 return 0;
718e3744 6942}
6943
d62a17ae 6944/* Display peer uptime.*/
9f049418 6945char *peer_uptime(time_t uptime2, char *buf, size_t len, bool use_json,
d62a17ae 6946 json_object *json)
6947{
6948 time_t uptime1, epoch_tbuf;
a2700b50 6949 struct tm tm;
d62a17ae 6950
d62a17ae 6951 /* If there is no connection has been done before print `never'. */
6952 if (uptime2 == 0) {
6953 if (use_json) {
6954 json_object_string_add(json, "peerUptime", "never");
6955 json_object_int_add(json, "peerUptimeMsec", 0);
6956 } else
6957 snprintf(buf, len, "never");
6958 return buf;
6959 }
718e3744 6960
d62a17ae 6961 /* Get current time. */
6962 uptime1 = bgp_clock();
6963 uptime1 -= uptime2;
a2700b50 6964 gmtime_r(&uptime1, &tm);
718e3744 6965
d62a17ae 6966 if (uptime1 < ONE_DAY_SECOND)
a2700b50
MS		 6967 snprintf(buf, len, "%02d:%02d:%02d", tm.tm_hour, tm.tm_min,
6968 tm.tm_sec);
d62a17ae 6969 else if (uptime1 < ONE_WEEK_SECOND)
a2700b50
MS		 6970 snprintf(buf, len, "%dd%02dh%02dm", tm.tm_yday, tm.tm_hour,
6971 tm.tm_min);
d62a17ae 6972 else if (uptime1 < ONE_YEAR_SECOND)
a2700b50
MS		 6973 snprintf(buf, len, "%02dw%dd%02dh", tm.tm_yday / 7,
6974 tm.tm_yday - ((tm.tm_yday / 7) * 7), tm.tm_hour);
d62a17ae 6975 else
a2700b50
MS		 6976 snprintf(buf, len, "%02dy%02dw%dd", tm.tm_year - 70,
6977 tm.tm_yday / 7,
6978 tm.tm_yday - ((tm.tm_yday / 7) * 7));
d62a17ae 6979
6980 if (use_json) {
6981 epoch_tbuf = time(NULL) - uptime1;
6982 json_object_string_add(json, "peerUptime", buf);
6983 json_object_int_add(json, "peerUptimeMsec", uptime1 * 1000);
6984 json_object_int_add(json, "peerUptimeEstablishedEpoch",
6985 epoch_tbuf);
6986 }
718e3744 6987
d62a17ae 6988 return buf;
718e3744 6989}
6990
c2d020ad 6991void bgp_master_init(struct thread_master *master, const int buffer_size)
718e3744 6992{
d62a17ae 6993 qobj_init();
0e64d123 6994
d62a17ae 6995 memset(&bgp_master, 0, sizeof(struct bgp_master));
718e3744 6996
d62a17ae 6997 bm = &bgp_master;
6998 bm->bgp = list_new();
6999 bm->listen_sockets = list_new();
7000 bm->port = BGP_PORT_DEFAULT;
7001 bm->master = master;
7002 bm->start_time = bgp_clock();
7003 bm->t_rmap_update = NULL;
7004 bm->rmap_update_timer = RMAP_DEFAULT_UPDATE_TIMER;
97b4a0ec 7005 bm->terminating = false;
c2d020ad 7006 bm->socket_buffer = buffer_size;
495f0b13 7007
d62a17ae 7008 bgp_process_queue_init();
b8fd6a15 7009
48ecf8f5 7010 bgp_mac_init();
e9eb5f63 7011 /* init the rd id space.
7012 assign 0th index in the bitfield,
523cafc4 7013 so that we start with id 1
7014 */
e9eb5f63 7015 bf_init(bm->rd_idspace, UINT16_MAX);
7016 bf_assign_zero_index(bm->rd_idspace);
7017
955bfd98 7018 /* mpls label dynamic allocation pool */
e70e9f8e 7019 bgp_lp_init(bm->master, &bm->labelpool);
955bfd98 7020
c44ab6f1 7021 bgp_evpn_mh_init();
d62a17ae 7022 QOBJ_REG(bm, bgp_master);
718e3744 7023}
200df115 7024
ad4cbda1 7025/*
009b18fc 7026 * Free up connected routes and interfaces for a BGP instance. Invoked upon
7027 * instance delete (non-default only) or BGP exit.
ad4cbda1 7028 */
d62a17ae 7029static void bgp_if_finish(struct bgp *bgp)
ad4cbda1 7030{
ee66b77f 7031 struct vrf *vrf;
d62a17ae 7032 struct interface *ifp;
7033
ee66b77f
PG		 7034 vrf = bgp_vrf_lookup_by_instance_type(bgp);
7035
f4e14fdb 7036 if (bgp->inst_type == BGP_INSTANCE_TYPE_VIEW || !vrf)
d62a17ae 7037 return;
ad4cbda1 7038
451fda4f 7039 FOR_ALL_INTERFACES (vrf, ifp) {
d62a17ae 7040 struct listnode *c_node, *c_nnode;
7041 struct connected *c;
ad4cbda1 7042
d62a17ae 7043 for (ALL_LIST_ELEMENTS(ifp->connected, c_node, c_nnode, c))
7044 bgp_connected_delete(bgp, c);
7045 }
ad4cbda1 7046}
6b0655a2 7047
d62a17ae 7048static void bgp_viewvrf_autocomplete(vector comps, struct cmd_token *token)
18c57037 7049{
d62a17ae 7050 struct vrf *vrf = NULL;
7051 struct listnode *next;
7052 struct bgp *bgp;
18c57037 7053
6a8ca00f
PG		 7054 RB_FOREACH (vrf, vrf_name_head, &vrfs_by_name)
7055 vector_set(comps, XSTRDUP(MTYPE_COMPLETION, vrf->name));
18c57037 7056
d62a17ae 7057 for (ALL_LIST_ELEMENTS_RO(bm->bgp, next, bgp)) {
7058 if (bgp->inst_type != BGP_INSTANCE_TYPE_VIEW)
7059 continue;
18c57037 7060
d62a17ae 7061 vector_set(comps, XSTRDUP(MTYPE_COMPLETION, bgp->name));
7062 }
18c57037
DS		 7063}
7064
2ed9fe4a
DL		 7065static void bgp_instasn_autocomplete(vector comps, struct cmd_token *token)
7066{
7067 struct listnode *next, *next2;
7068 struct bgp *bgp, *bgp2;
7069 char buf[11];
7070
7071 for (ALL_LIST_ELEMENTS_RO(bm->bgp, next, bgp)) {
7072 /* deduplicate */
7073 for (ALL_LIST_ELEMENTS_RO(bm->bgp, next2, bgp2)) {
7074 if (bgp2->as == bgp->as)
7075 break;
7076 if (bgp2 == bgp)
7077 break;
7078 }
7079 if (bgp2 != bgp)
7080 continue;
7081
7082 snprintf(buf, sizeof(buf), "%u", bgp->as);
7083 vector_set(comps, XSTRDUP(MTYPE_COMPLETION, buf));
7084 }
7085}
7086
18c57037 7087static const struct cmd_variable_handler bgp_viewvrf_var_handlers[] = {
d62a17ae 7088 {.tokenname = "VIEWVRFNAME", .completions = bgp_viewvrf_autocomplete},
2ed9fe4a 7089 {.varname = "instasn", .completions = bgp_instasn_autocomplete},
d62a17ae 7090 {.completions = NULL},
18c57037
DS		 7091};
7092
1ac267a2
DL		 7093struct frr_pthread *bgp_pth_io;
7094struct frr_pthread *bgp_pth_ka;
7095
4d762f26 7096static void bgp_pthreads_init(void)
2d4ee774 7097{
1ac267a2
DL		 7098 assert(!bgp_pth_io);
7099 assert(!bgp_pth_ka);
7100
a715eab3 7101 struct frr_pthread_attr io = {
a715eab3
QY		 7102 .start = frr_pthread_attr_default.start,
7103 .stop = frr_pthread_attr_default.stop,
a715eab3
QY		 7104 };
7105 struct frr_pthread_attr ka = {
a715eab3
QY		 7106 .start = bgp_keepalives_start,
7107 .stop = bgp_keepalives_stop,
a715eab3 7108 };
1ac267a2
DL		 7109 bgp_pth_io = frr_pthread_new(&io, "BGP I/O thread", "bgpd_io");
7110 bgp_pth_ka = frr_pthread_new(&ka, "BGP Keepalives thread", "bgpd_ka");
419dfe6a
QY		 7111}
7112
4d762f26 7113void bgp_pthreads_run(void)
419dfe6a 7114{
1ac267a2
DL		 7115 frr_pthread_run(bgp_pth_io, NULL);
7116 frr_pthread_run(bgp_pth_ka, NULL);
88b24dee 7117
a715eab3 7118 /* Wait until threads are ready. */
1ac267a2
DL		 7119 frr_pthread_wait_running(bgp_pth_io);
7120 frr_pthread_wait_running(bgp_pth_ka);
2d4ee774
QY		 7121}
7122
4d762f26 7123void bgp_pthreads_finish(void)
2d4ee774 7124{
0ca8b79f 7125 frr_pthread_stop_all();
2d4ee774
QY		 7126}
7127
f533be73 7128void bgp_init(unsigned short instance)
718e3744 7129{
fc9a856f 7130
d62a17ae 7131 /* allocates some vital data structures used by peer commands in
7132 * vty_init */
718e3744 7133
419dfe6a
QY		 7134 /* pre-init pthreads */
7135 bgp_pthreads_init();
7136
d62a17ae 7137 /* Init zebra. */
f533be73 7138 bgp_zebra_init(bm->master, instance);
718e3744 7139
49e5a4a0 7140#ifdef ENABLE_BGP_VNC
d62a17ae 7141 vnc_zebra_init(bm->master);
65efcfce
LB		 7142#endif
7143
d62a17ae 7144 /* BGP VTY commands installation. */
7145 bgp_vty_init();
7146
7147 /* BGP inits. */
7148 bgp_attr_init();
7149 bgp_debug_init();
7150 bgp_dump_init();
7151 bgp_route_init();
7152 bgp_route_map_init();
7153 bgp_scan_vty_init();
7154 bgp_mplsvpn_init();
49e5a4a0 7155#ifdef ENABLE_BGP_VNC
d62a17ae 7156 rfapi_init();
65efcfce 7157#endif
d62a17ae 7158 bgp_ethernetvpn_init();
7c40bf39 7159 bgp_flowspec_vty_init();
d62a17ae 7160
7161 /* Access list initialize. */
7162 access_list_init();
7163 access_list_add_hook(peer_distribute_update);
7164 access_list_delete_hook(peer_distribute_update);
7165
7166 /* Filter list initialize. */
7167 bgp_filter_init();
7168 as_list_add_hook(peer_aslist_add);
7169 as_list_delete_hook(peer_aslist_del);
7170
7171 /* Prefix list initialize.*/
7172 prefix_list_init();
7173 prefix_list_add_hook(peer_prefix_list_update);
7174 prefix_list_delete_hook(peer_prefix_list_update);
7175
7176 /* Community list initialize. */
7177 bgp_clist = community_list_init();
7178
7179 /* BFD init */
7180 bgp_bfd_init();
7181
7182 cmd_variable_handler_register(bgp_viewvrf_var_handlers);
7183}
7184
7185void bgp_terminate(void)
7186{
7187 struct bgp *bgp;
7188 struct peer *peer;
7189 struct listnode *node, *nnode;
7190 struct listnode *mnode, *mnnode;
7191
7192 QOBJ_UNREG(bm);
7193
7194 /* Close the listener sockets first as this prevents peers from
7195 * attempting
7196 * to reconnect on receiving the peer unconfig message. In the presence
7197 * of a large number of peers this will ensure that no peer is left with
7198 * a dangling connection
7199 */
7200 /* reverse bgp_master_init */
7201 bgp_close();
c3004bc4 7202
d62a17ae 7203 if (bm->listen_sockets)
6a154c88 7204 list_delete(&bm->listen_sockets);
d62a17ae 7205
7206 for (ALL_LIST_ELEMENTS(bm->bgp, mnode, mnnode, bgp))
7207 for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer))
7208 if (peer->status == Established
7209 || peer->status == OpenSent
7210 || peer->status == OpenConfirm)
7211 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
7212 BGP_NOTIFY_CEASE_PEER_UNCONFIG);
7213
e208c8f9
DS		 7214 if (bm->process_main_queue)
7215 work_queue_free_and_null(&bm->process_main_queue);
d62a17ae 7216
7217 if (bm->t_rmap_update)
7218 BGP_TIMER_OFF(bm->t_rmap_update);
955bfd98 7219
48ecf8f5 7220 bgp_mac_finish();
c44ab6f1 7221 bgp_evpn_mh_finish();
545acafb 7222}
dcc1615e
DD		 7223
7224struct peer *peer_lookup_in_view(struct vty *vty, struct bgp *bgp,
7225 const char *ip_str, bool use_json)
7226{
7227 int ret;
7228 struct peer *peer;
7229 union sockunion su;
7230
7231 /* Get peer sockunion. */
7232 ret = str2sockunion(ip_str, &su);
7233 if (ret < 0) {
7234 peer = peer_lookup_by_conf_if(bgp, ip_str);
7235 if (!peer) {
7236 peer = peer_lookup_by_hostname(bgp, ip_str);
7237
7238 if (!peer) {
7239 if (use_json) {
7240 json_object *json_no = NULL;
7241 json_no = json_object_new_object();
7242 json_object_string_add(
7243 json_no,
7244 "malformedAddressOrName",
7245 ip_str);
7246 vty_out(vty, "%s\n",
7247 json_object_to_json_string_ext(
7248 json_no,
7249 JSON_C_TO_STRING_PRETTY));
7250 json_object_free(json_no);
7251 } else
7252 vty_out(vty,
7253 "%% Malformed address or name: %s\n",
7254 ip_str);
7255 return NULL;
7256 }
7257 }
7258 return peer;
7259 }
7260
7261 /* Peer structure lookup. */
7262 peer = peer_lookup(bgp, &su);
7263 if (!peer) {
7264 if (use_json) {
7265 json_object *json_no = NULL;
7266 json_no = json_object_new_object();
7267 json_object_string_add(json_no, "warning",
7268 "No such neighbor in this view/vrf");
7269 vty_out(vty, "%s\n",
7270 json_object_to_json_string_ext(
7271 json_no, JSON_C_TO_STRING_PRETTY));
7272 json_object_free(json_no);
7273 } else
7274 vty_out(vty, "No such neighbor in this view/vrf\n");
7275 return NULL;
7276 }
7277
7278 return peer;
7279}
7280
794b37d5 7281void bgp_gr_apply_running_config(void)
7282{
7283 struct peer *peer = NULL;
7284 struct bgp *bgp = NULL;
7285 struct listnode *node, *nnode;
dc95985f 7286 bool gr_router_detected = false;
794b37d5 7287
7288 if (BGP_DEBUG(graceful_restart, GRACEFUL_RESTART))
36235319 7289 zlog_debug("[BGP_GR] %s called !", __func__);
794b37d5 7290
dc95985f 7291 for (ALL_LIST_ELEMENTS(bm->bgp, node, nnode, bgp)) {
7292 for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) {
794b37d5 7293 bgp_peer_gr_flags_update(peer);
36235319 7294 if (CHECK_FLAG(peer->flags, PEER_FLAG_GRACEFUL_RESTART))
dc95985f 7295 gr_router_detected = true;
7296 }
7297
36235319
QY		 7298 if (gr_router_detected
7299 && bgp->present_zebra_gr_state == ZEBRA_GR_DISABLE) {
2ba1fe69 7300 bgp_zebra_send_capabilities(bgp, true);
36235319
QY		 7301 } else if (!gr_router_detected
7302 && bgp->present_zebra_gr_state == ZEBRA_GR_ENABLE) {
2ba1fe69 7303 bgp_zebra_send_capabilities(bgp, false);
dc95985f 7304 }
7305
7306 gr_router_detected = false;
7307 }
794b37d5 7308}
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