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718e3744 | 1 | /* BGP-4 Finite State Machine |
2 | From RFC1771 [A Border Gateway Protocol 4 (BGP-4)] | |
3 | Copyright (C) 1996, 97, 98 Kunihiro Ishiguro | |
4 | ||
5 | This file is part of GNU Zebra. | |
6 | ||
7 | GNU Zebra is free software; you can redistribute it and/or modify it | |
8 | under the terms of the GNU General Public License as published by the | |
9 | Free Software Foundation; either version 2, or (at your option) any | |
10 | later version. | |
11 | ||
12 | GNU Zebra is distributed in the hope that it will be useful, but | |
13 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU Zebra; see the file COPYING. If not, write to the Free | |
19 | Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA | |
20 | 02111-1307, USA. */ | |
21 | ||
22 | #include <zebra.h> | |
23 | ||
24 | #include "linklist.h" | |
25 | #include "prefix.h" | |
26 | #include "vty.h" | |
27 | #include "sockunion.h" | |
28 | #include "thread.h" | |
29 | #include "log.h" | |
30 | #include "stream.h" | |
31 | #include "memory.h" | |
32 | #include "plist.h" | |
33 | ||
34 | #include "bgpd/bgpd.h" | |
35 | #include "bgpd/bgp_attr.h" | |
36 | #include "bgpd/bgp_debug.h" | |
37 | #include "bgpd/bgp_fsm.h" | |
38 | #include "bgpd/bgp_packet.h" | |
39 | #include "bgpd/bgp_network.h" | |
40 | #include "bgpd/bgp_route.h" | |
41 | #include "bgpd/bgp_dump.h" | |
42 | #include "bgpd/bgp_open.h" | |
43 | #ifdef HAVE_SNMP | |
44 | #include "bgpd/bgp_snmp.h" | |
45 | #endif /* HAVE_SNMP */ | |
46 | \f | |
47 | /* BGP FSM (finite state machine) has three types of functions. Type | |
48 | one is thread functions. Type two is event functions. Type three | |
49 | is FSM functions. Timer functions are set by bgp_timer_set | |
50 | function. */ | |
51 | ||
52 | /* BGP event function. */ | |
53 | int bgp_event (struct thread *); | |
54 | ||
55 | /* BGP thread functions. */ | |
56 | static int bgp_start_timer (struct thread *); | |
57 | static int bgp_connect_timer (struct thread *); | |
58 | static int bgp_holdtime_timer (struct thread *); | |
59 | static int bgp_keepalive_timer (struct thread *); | |
60 | ||
61 | /* BGP FSM functions. */ | |
62 | static int bgp_start (struct peer *); | |
63 | ||
64 | /* BGP start timer jitter. */ | |
94f2b392 | 65 | static int |
718e3744 | 66 | bgp_start_jitter (int time) |
67 | { | |
68 | return ((rand () % (time + 1)) - (time / 2)); | |
69 | } | |
70 | ||
71 | /* Hook function called after bgp event is occered. And vty's | |
72 | neighbor command invoke this function after making neighbor | |
73 | structure. */ | |
74 | void | |
75 | bgp_timer_set (struct peer *peer) | |
76 | { | |
77 | int jitter = 0; | |
78 | ||
79 | switch (peer->status) | |
80 | { | |
81 | case Idle: | |
82 | /* First entry point of peer's finite state machine. In Idle | |
83 | status start timer is on unless peer is shutdown or peer is | |
84 | inactive. All other timer must be turned off */ | |
85 | if (CHECK_FLAG (peer->flags, PEER_FLAG_SHUTDOWN) | |
86 | || CHECK_FLAG (peer->sflags, PEER_STATUS_PREFIX_OVERFLOW) | |
64e580a7 | 87 | || CHECK_FLAG (peer->sflags, PEER_STATUS_CLEARING) |
718e3744 | 88 | || ! peer_active (peer)) |
89 | { | |
90 | BGP_TIMER_OFF (peer->t_start); | |
91 | } | |
92 | else | |
93 | { | |
94 | jitter = bgp_start_jitter (peer->v_start); | |
95 | BGP_TIMER_ON (peer->t_start, bgp_start_timer, | |
96 | peer->v_start + jitter); | |
97 | } | |
98 | BGP_TIMER_OFF (peer->t_connect); | |
99 | BGP_TIMER_OFF (peer->t_holdtime); | |
100 | BGP_TIMER_OFF (peer->t_keepalive); | |
101 | BGP_TIMER_OFF (peer->t_asorig); | |
102 | BGP_TIMER_OFF (peer->t_routeadv); | |
103 | break; | |
104 | ||
105 | case Connect: | |
106 | /* After start timer is expired, the peer moves to Connnect | |
107 | status. Make sure start timer is off and connect timer is | |
108 | on. */ | |
109 | BGP_TIMER_OFF (peer->t_start); | |
110 | BGP_TIMER_ON (peer->t_connect, bgp_connect_timer, peer->v_connect); | |
111 | BGP_TIMER_OFF (peer->t_holdtime); | |
112 | BGP_TIMER_OFF (peer->t_keepalive); | |
113 | BGP_TIMER_OFF (peer->t_asorig); | |
114 | BGP_TIMER_OFF (peer->t_routeadv); | |
115 | break; | |
116 | ||
117 | case Active: | |
118 | /* Active is waiting connection from remote peer. And if | |
119 | connect timer is expired, change status to Connect. */ | |
120 | BGP_TIMER_OFF (peer->t_start); | |
121 | /* If peer is passive mode, do not set connect timer. */ | |
93406d87 | 122 | if (CHECK_FLAG (peer->flags, PEER_FLAG_PASSIVE) |
123 | || CHECK_FLAG (peer->sflags, PEER_STATUS_NSF_WAIT)) | |
718e3744 | 124 | { |
125 | BGP_TIMER_OFF (peer->t_connect); | |
126 | } | |
127 | else | |
128 | { | |
129 | BGP_TIMER_ON (peer->t_connect, bgp_connect_timer, peer->v_connect); | |
130 | } | |
131 | BGP_TIMER_OFF (peer->t_holdtime); | |
132 | BGP_TIMER_OFF (peer->t_keepalive); | |
133 | BGP_TIMER_OFF (peer->t_asorig); | |
134 | BGP_TIMER_OFF (peer->t_routeadv); | |
135 | break; | |
136 | ||
137 | case OpenSent: | |
138 | /* OpenSent status. */ | |
139 | BGP_TIMER_OFF (peer->t_start); | |
140 | BGP_TIMER_OFF (peer->t_connect); | |
141 | if (peer->v_holdtime != 0) | |
142 | { | |
143 | BGP_TIMER_ON (peer->t_holdtime, bgp_holdtime_timer, | |
144 | peer->v_holdtime); | |
145 | } | |
146 | else | |
147 | { | |
148 | BGP_TIMER_OFF (peer->t_holdtime); | |
149 | } | |
150 | BGP_TIMER_OFF (peer->t_keepalive); | |
151 | BGP_TIMER_OFF (peer->t_asorig); | |
152 | BGP_TIMER_OFF (peer->t_routeadv); | |
153 | break; | |
154 | ||
155 | case OpenConfirm: | |
156 | /* OpenConfirm status. */ | |
157 | BGP_TIMER_OFF (peer->t_start); | |
158 | BGP_TIMER_OFF (peer->t_connect); | |
159 | ||
160 | /* If the negotiated Hold Time value is zero, then the Hold Time | |
161 | timer and KeepAlive timers are not started. */ | |
162 | if (peer->v_holdtime == 0) | |
163 | { | |
164 | BGP_TIMER_OFF (peer->t_holdtime); | |
165 | BGP_TIMER_OFF (peer->t_keepalive); | |
166 | } | |
167 | else | |
168 | { | |
169 | BGP_TIMER_ON (peer->t_holdtime, bgp_holdtime_timer, | |
170 | peer->v_holdtime); | |
171 | BGP_TIMER_ON (peer->t_keepalive, bgp_keepalive_timer, | |
172 | peer->v_keepalive); | |
173 | } | |
174 | BGP_TIMER_OFF (peer->t_asorig); | |
175 | BGP_TIMER_OFF (peer->t_routeadv); | |
176 | break; | |
177 | ||
178 | case Established: | |
179 | /* In Established status start and connect timer is turned | |
180 | off. */ | |
181 | BGP_TIMER_OFF (peer->t_start); | |
182 | BGP_TIMER_OFF (peer->t_connect); | |
183 | ||
184 | /* Same as OpenConfirm, if holdtime is zero then both holdtime | |
185 | and keepalive must be turned off. */ | |
186 | if (peer->v_holdtime == 0) | |
187 | { | |
188 | BGP_TIMER_OFF (peer->t_holdtime); | |
189 | BGP_TIMER_OFF (peer->t_keepalive); | |
190 | } | |
191 | else | |
192 | { | |
193 | BGP_TIMER_ON (peer->t_holdtime, bgp_holdtime_timer, | |
194 | peer->v_holdtime); | |
195 | BGP_TIMER_ON (peer->t_keepalive, bgp_keepalive_timer, | |
196 | peer->v_keepalive); | |
197 | } | |
198 | BGP_TIMER_OFF (peer->t_asorig); | |
199 | break; | |
200 | } | |
201 | } | |
202 | ||
203 | /* BGP start timer. This function set BGP_Start event to thread value | |
204 | and process event. */ | |
205 | static int | |
206 | bgp_start_timer (struct thread *thread) | |
207 | { | |
208 | struct peer *peer; | |
209 | ||
210 | peer = THREAD_ARG (thread); | |
211 | peer->t_start = NULL; | |
212 | ||
213 | if (BGP_DEBUG (fsm, FSM)) | |
214 | zlog (peer->log, LOG_DEBUG, | |
215 | "%s [FSM] Timer (start timer expire).", peer->host); | |
216 | ||
217 | THREAD_VAL (thread) = BGP_Start; | |
200df115 | 218 | bgp_event (thread); /* bgp_event unlocks peer */ |
718e3744 | 219 | |
220 | return 0; | |
221 | } | |
222 | ||
223 | /* BGP connect retry timer. */ | |
224 | static int | |
225 | bgp_connect_timer (struct thread *thread) | |
226 | { | |
227 | struct peer *peer; | |
228 | ||
229 | peer = THREAD_ARG (thread); | |
230 | peer->t_connect = NULL; | |
231 | ||
232 | if (BGP_DEBUG (fsm, FSM)) | |
233 | zlog (peer->log, LOG_DEBUG, "%s [FSM] Timer (connect timer expire)", | |
234 | peer->host); | |
235 | ||
236 | THREAD_VAL (thread) = ConnectRetry_timer_expired; | |
200df115 | 237 | bgp_event (thread); /* bgp_event unlocks peer */ |
718e3744 | 238 | |
239 | return 0; | |
240 | } | |
241 | ||
242 | /* BGP holdtime timer. */ | |
243 | static int | |
244 | bgp_holdtime_timer (struct thread *thread) | |
245 | { | |
246 | struct peer *peer; | |
247 | ||
248 | peer = THREAD_ARG (thread); | |
249 | peer->t_holdtime = NULL; | |
250 | ||
251 | if (BGP_DEBUG (fsm, FSM)) | |
252 | zlog (peer->log, LOG_DEBUG, | |
253 | "%s [FSM] Timer (holdtime timer expire)", | |
254 | peer->host); | |
255 | ||
256 | THREAD_VAL (thread) = Hold_Timer_expired; | |
200df115 | 257 | bgp_event (thread); /* bgp_event unlocks peer */ |
718e3744 | 258 | |
259 | return 0; | |
260 | } | |
261 | ||
262 | /* BGP keepalive fire ! */ | |
263 | static int | |
264 | bgp_keepalive_timer (struct thread *thread) | |
265 | { | |
266 | struct peer *peer; | |
267 | ||
268 | peer = THREAD_ARG (thread); | |
269 | peer->t_keepalive = NULL; | |
270 | ||
271 | if (BGP_DEBUG (fsm, FSM)) | |
272 | zlog (peer->log, LOG_DEBUG, | |
273 | "%s [FSM] Timer (keepalive timer expire)", | |
274 | peer->host); | |
275 | ||
276 | THREAD_VAL (thread) = KeepAlive_timer_expired; | |
200df115 | 277 | bgp_event (thread); /* bgp_event unlocks peer */ |
718e3744 | 278 | |
279 | return 0; | |
280 | } | |
281 | ||
94f2b392 | 282 | static int |
718e3744 | 283 | bgp_routeadv_timer (struct thread *thread) |
284 | { | |
285 | struct peer *peer; | |
286 | ||
287 | peer = THREAD_ARG (thread); | |
288 | peer->t_routeadv = NULL; | |
289 | ||
290 | if (BGP_DEBUG (fsm, FSM)) | |
291 | zlog (peer->log, LOG_DEBUG, | |
292 | "%s [FSM] Timer (routeadv timer expire)", | |
293 | peer->host); | |
294 | ||
295 | peer->synctime = time (NULL); | |
296 | ||
eb821189 | 297 | BGP_WRITE_ON (peer->t_write, bgp_write, peer->fd); |
718e3744 | 298 | |
299 | BGP_TIMER_ON (peer->t_routeadv, bgp_routeadv_timer, | |
300 | peer->v_routeadv); | |
301 | ||
302 | return 0; | |
303 | } | |
304 | ||
305 | /* Reset bgp update timer */ | |
306 | static void | |
307 | bgp_uptime_reset (struct peer *peer) | |
308 | { | |
309 | peer->uptime = time (NULL); | |
310 | } | |
311 | ||
e0701b79 | 312 | /* BGP Peer Down Cause */ |
fd79ac91 | 313 | const char *peer_down_str[] = |
e0701b79 | 314 | { |
315 | "", | |
316 | "Router ID changed", | |
317 | "Remote AS changed", | |
318 | "Local AS change", | |
319 | "Cluster ID changed", | |
320 | "Confederation identifier changed", | |
321 | "Confederation peer changed", | |
322 | "RR client config change", | |
323 | "RS client config change", | |
324 | "Update source change", | |
325 | "Address family activated", | |
326 | "Admin. shutdown", | |
327 | "User reset", | |
328 | "BGP Notification received", | |
329 | "BGP Notification send", | |
330 | "Peer closed the session", | |
331 | "Neighbor deleted", | |
332 | "Peer-group add member", | |
333 | "Peer-group delete member", | |
334 | "Capability changed", | |
335 | "Passive config change", | |
93406d87 | 336 | "Multihop config change", |
337 | "NSF peer closed the session" | |
e0701b79 | 338 | }; |
339 | ||
94f2b392 | 340 | static int |
93406d87 | 341 | bgp_graceful_restart_timer_expire (struct thread *thread) |
342 | { | |
343 | struct peer *peer; | |
344 | afi_t afi; | |
345 | safi_t safi; | |
346 | ||
347 | peer = THREAD_ARG (thread); | |
348 | peer->t_gr_restart = NULL; | |
349 | ||
350 | /* NSF delete stale route */ | |
351 | for (afi = AFI_IP ; afi < AFI_MAX ; afi++) | |
352 | for (safi = SAFI_UNICAST ; safi < SAFI_UNICAST_MULTICAST ; safi++) | |
353 | if (peer->nsf[afi][safi]) | |
354 | bgp_clear_stale_route (peer, afi, safi); | |
355 | ||
356 | UNSET_FLAG (peer->sflags, PEER_STATUS_NSF_WAIT); | |
357 | BGP_TIMER_OFF (peer->t_gr_stale); | |
358 | ||
359 | if (BGP_DEBUG (events, EVENTS)) | |
360 | { | |
361 | zlog_debug ("%s graceful restart timer expired", peer->host); | |
362 | zlog_debug ("%s graceful restart stalepath timer stopped", peer->host); | |
363 | } | |
364 | ||
365 | bgp_timer_set (peer); | |
366 | ||
367 | return 0; | |
368 | } | |
369 | ||
94f2b392 | 370 | static int |
93406d87 | 371 | bgp_graceful_stale_timer_expire (struct thread *thread) |
372 | { | |
373 | struct peer *peer; | |
374 | afi_t afi; | |
375 | safi_t safi; | |
376 | ||
377 | peer = THREAD_ARG (thread); | |
378 | peer->t_gr_stale = NULL; | |
379 | ||
380 | if (BGP_DEBUG (events, EVENTS)) | |
381 | zlog_debug ("%s graceful restart stalepath timer expired", peer->host); | |
382 | ||
383 | /* NSF delete stale route */ | |
384 | for (afi = AFI_IP ; afi < AFI_MAX ; afi++) | |
385 | for (safi = SAFI_UNICAST ; safi < SAFI_UNICAST_MULTICAST ; safi++) | |
386 | if (peer->nsf[afi][safi]) | |
387 | bgp_clear_stale_route (peer, afi, safi); | |
388 | ||
389 | return 0; | |
390 | } | |
391 | ||
200df115 | 392 | /* Called after event occured, this function change status and reset |
393 | read/write and timer thread. */ | |
394 | void | |
395 | bgp_fsm_change_status (struct peer *peer, int status) | |
396 | { | |
397 | bgp_dump_state (peer, peer->status, status); | |
398 | ||
399 | /* Preserve old status and change into new status. */ | |
400 | peer->ostatus = peer->status; | |
401 | peer->status = status; | |
402 | ||
403 | if (BGP_DEBUG (normal, NORMAL)) | |
404 | zlog_debug ("%s went from %s to %s", | |
405 | peer->host, | |
406 | LOOKUP (bgp_status_msg, peer->ostatus), | |
407 | LOOKUP (bgp_status_msg, peer->status)); | |
408 | } | |
409 | ||
718e3744 | 410 | /* Administrative BGP peer stop event. */ |
411 | int | |
412 | bgp_stop (struct peer *peer) | |
413 | { | |
718e3744 | 414 | afi_t afi; |
415 | safi_t safi; | |
200df115 | 416 | unsigned int i; |
718e3744 | 417 | char orf_name[BUFSIZ]; |
418 | ||
419 | /* Increment Dropped count. */ | |
420 | if (peer->status == Established) | |
421 | { | |
718e3744 | 422 | peer->dropped++; |
423 | bgp_fsm_change_status (peer, Idle); | |
848973c7 | 424 | |
425 | /* bgp log-neighbor-changes of neighbor Down */ | |
426 | if (bgp_flag_check (peer->bgp, BGP_FLAG_LOG_NEIGHBOR_CHANGES)) | |
e0701b79 | 427 | zlog_info ("%%ADJCHANGE: neighbor %s Down %s", peer->host, |
428 | peer_down_str [(int) peer->last_reset]); | |
848973c7 | 429 | |
93406d87 | 430 | /* graceful restart */ |
431 | if (peer->t_gr_stale) | |
432 | { | |
433 | BGP_TIMER_OFF (peer->t_gr_stale); | |
434 | if (BGP_DEBUG (events, EVENTS)) | |
435 | zlog_debug ("%s graceful restart stalepath timer stopped", peer->host); | |
436 | } | |
437 | if (CHECK_FLAG (peer->sflags, PEER_STATUS_NSF_WAIT)) | |
438 | { | |
439 | if (BGP_DEBUG (events, EVENTS)) | |
440 | { | |
441 | zlog_debug ("%s graceful restart timer started for %d sec", | |
442 | peer->host, peer->v_gr_restart); | |
443 | zlog_debug ("%s graceful restart stalepath timer started for %d sec", | |
444 | peer->host, peer->bgp->stalepath_time); | |
445 | } | |
446 | BGP_TIMER_ON (peer->t_gr_restart, bgp_graceful_restart_timer_expire, | |
447 | peer->v_gr_restart); | |
448 | BGP_TIMER_ON (peer->t_gr_stale, bgp_graceful_stale_timer_expire, | |
449 | peer->bgp->stalepath_time); | |
450 | } | |
451 | else | |
452 | { | |
453 | UNSET_FLAG (peer->sflags, PEER_STATUS_NSF_MODE); | |
454 | ||
455 | for (afi = AFI_IP ; afi < AFI_MAX ; afi++) | |
456 | for (safi = SAFI_UNICAST ; safi < SAFI_UNICAST_MULTICAST ; safi++) | |
457 | peer->nsf[afi][safi] = 0; | |
458 | } | |
459 | ||
848973c7 | 460 | /* set last reset time */ |
461 | peer->resettime = time (NULL); | |
c5317404 | 462 | /* Reset uptime. */ |
463 | bgp_uptime_reset (peer); | |
848973c7 | 464 | |
718e3744 | 465 | #ifdef HAVE_SNMP |
466 | bgpTrapBackwardTransition (peer); | |
467 | #endif /* HAVE_SNMP */ | |
718e3744 | 468 | |
538621f2 | 469 | /* Reset uptime. */ |
470 | bgp_uptime_reset (peer); | |
471 | ||
472 | /* Need of clear of peer. */ | |
473 | bgp_clear_route_all (peer); | |
f418446b | 474 | |
475 | /* Reset peer synctime */ | |
476 | peer->synctime = 0; | |
538621f2 | 477 | } |
718e3744 | 478 | |
479 | /* Stop read and write threads when exists. */ | |
480 | BGP_READ_OFF (peer->t_read); | |
481 | BGP_WRITE_OFF (peer->t_write); | |
482 | ||
483 | /* Stop all timers. */ | |
484 | BGP_TIMER_OFF (peer->t_start); | |
485 | BGP_TIMER_OFF (peer->t_connect); | |
486 | BGP_TIMER_OFF (peer->t_holdtime); | |
487 | BGP_TIMER_OFF (peer->t_keepalive); | |
488 | BGP_TIMER_OFF (peer->t_asorig); | |
489 | BGP_TIMER_OFF (peer->t_routeadv); | |
490 | ||
200df115 | 491 | /* Delete all existing events of the peer, |
492 | and corresponding peer ref-count */ | |
493 | for (i = thread_cancel_event (master, peer); i > 0; i--) | |
494 | peer_unlock (peer); /* thread event reference */ | |
495 | ||
718e3744 | 496 | /* Stream reset. */ |
497 | peer->packet_size = 0; | |
498 | ||
499 | /* Clear input and output buffer. */ | |
500 | if (peer->ibuf) | |
501 | stream_reset (peer->ibuf); | |
502 | if (peer->work) | |
503 | stream_reset (peer->work); | |
200df115 | 504 | if (peer->obuf) |
505 | stream_fifo_clean (peer->obuf); | |
718e3744 | 506 | |
eb821189 | 507 | /* Close of file descriptor. */ |
508 | if (peer->fd >= 0) | |
509 | { | |
510 | close (peer->fd); | |
511 | peer->fd = -1; | |
512 | } | |
718e3744 | 513 | |
718e3744 | 514 | for (afi = AFI_IP ; afi < AFI_MAX ; afi++) |
515 | for (safi = SAFI_UNICAST ; safi < SAFI_MAX ; safi++) | |
516 | { | |
538621f2 | 517 | /* Reset all negotiated variables */ |
518 | peer->afc_nego[afi][safi] = 0; | |
519 | peer->afc_adv[afi][safi] = 0; | |
520 | peer->afc_recv[afi][safi] = 0; | |
521 | ||
718e3744 | 522 | /* peer address family capability flags*/ |
523 | peer->af_cap[afi][safi] = 0; | |
538621f2 | 524 | |
718e3744 | 525 | /* peer address family status flags*/ |
526 | peer->af_sflags[afi][safi] = 0; | |
538621f2 | 527 | |
718e3744 | 528 | /* Received ORF prefix-filter */ |
529 | peer->orf_plist[afi][safi] = NULL; | |
538621f2 | 530 | |
718e3744 | 531 | /* ORF received prefix-filter pnt */ |
532 | sprintf (orf_name, "%s.%d.%d", peer->host, afi, safi); | |
533 | prefix_bgp_orf_remove_all (orf_name); | |
534 | } | |
535 | ||
536 | /* Reset keepalive and holdtime */ | |
537 | if (CHECK_FLAG (peer->config, PEER_CONFIG_TIMER)) | |
538 | { | |
539 | peer->v_keepalive = peer->keepalive; | |
540 | peer->v_holdtime = peer->holdtime; | |
541 | } | |
542 | else | |
543 | { | |
544 | peer->v_keepalive = peer->bgp->default_keepalive; | |
545 | peer->v_holdtime = peer->bgp->default_holdtime; | |
546 | } | |
547 | ||
548 | peer->update_time = 0; | |
549 | ||
550 | /* Until we are sure that there is no problem about prefix count | |
551 | this should be commented out.*/ | |
552 | #if 0 | |
553 | /* Reset prefix count */ | |
554 | peer->pcount[AFI_IP][SAFI_UNICAST] = 0; | |
555 | peer->pcount[AFI_IP][SAFI_MULTICAST] = 0; | |
556 | peer->pcount[AFI_IP][SAFI_MPLS_VPN] = 0; | |
557 | peer->pcount[AFI_IP6][SAFI_UNICAST] = 0; | |
558 | peer->pcount[AFI_IP6][SAFI_MULTICAST] = 0; | |
559 | #endif /* 0 */ | |
560 | ||
561 | return 0; | |
562 | } | |
563 | ||
564 | /* BGP peer is stoped by the error. */ | |
94f2b392 | 565 | static int |
718e3744 | 566 | bgp_stop_with_error (struct peer *peer) |
567 | { | |
568 | /* Double start timer. */ | |
569 | peer->v_start *= 2; | |
570 | ||
571 | /* Overflow check. */ | |
572 | if (peer->v_start >= (60 * 2)) | |
573 | peer->v_start = (60 * 2); | |
574 | ||
575 | bgp_stop (peer); | |
576 | ||
577 | return 0; | |
578 | } | |
579 | ||
580 | /* TCP connection open. Next we send open message to remote peer. And | |
581 | add read thread for reading open message. */ | |
94f2b392 | 582 | static int |
718e3744 | 583 | bgp_connect_success (struct peer *peer) |
584 | { | |
f418446b | 585 | char buf1[BUFSIZ]; |
586 | ||
eb821189 | 587 | if (peer->fd < 0) |
718e3744 | 588 | { |
589 | zlog_err ("bgp_connect_success peer's fd is negative value %d", | |
eb821189 | 590 | peer->fd); |
718e3744 | 591 | return -1; |
592 | } | |
eb821189 | 593 | BGP_READ_ON (peer->t_read, bgp_read, peer->fd); |
718e3744 | 594 | |
f418446b | 595 | if (! CHECK_FLAG (peer->sflags, PEER_STATUS_ACCEPT_PEER)) |
596 | bgp_getsockname (peer); | |
597 | ||
598 | if (BGP_DEBUG (normal, NORMAL)) | |
599 | { | |
600 | if (! CHECK_FLAG (peer->sflags, PEER_STATUS_ACCEPT_PEER)) | |
601 | zlog_debug ("%s open active, local address %s", peer->host, | |
602 | sockunion2str (peer->su_local, buf1, SU_ADDRSTRLEN)); | |
603 | else | |
604 | zlog_debug ("%s passive open", peer->host); | |
605 | } | |
718e3744 | 606 | |
607 | if (! CHECK_FLAG (peer->sflags, PEER_STATUS_ACCEPT_PEER)) | |
608 | bgp_open_send (peer); | |
609 | ||
610 | return 0; | |
611 | } | |
612 | ||
613 | /* TCP connect fail */ | |
94f2b392 | 614 | static int |
718e3744 | 615 | bgp_connect_fail (struct peer *peer) |
616 | { | |
617 | bgp_stop (peer); | |
618 | return 0; | |
619 | } | |
620 | ||
621 | /* This function is the first starting point of all BGP connection. It | |
622 | try to connect to remote peer with non-blocking IO. */ | |
623 | int | |
624 | bgp_start (struct peer *peer) | |
625 | { | |
626 | int status; | |
627 | ||
33d5ab9e PJ |
628 | /* Scrub some information that might be left over from a previous, |
629 | * session | |
630 | */ | |
631 | /* Connection information. */ | |
632 | if (peer->su_local) | |
633 | { | |
634 | sockunion_free (peer->su_local); | |
635 | peer->su_local = NULL; | |
636 | } | |
637 | ||
638 | if (peer->su_remote) | |
639 | { | |
640 | sockunion_free (peer->su_remote); | |
641 | peer->su_remote = NULL; | |
642 | } | |
643 | ||
644 | /* Clear remote router-id. */ | |
645 | peer->remote_id.s_addr = 0; | |
646 | ||
647 | /* Clear peer capability flag. */ | |
648 | peer->cap = 0; | |
649 | ||
718e3744 | 650 | /* If the peer is passive mode, force to move to Active mode. */ |
651 | if (CHECK_FLAG (peer->flags, PEER_FLAG_PASSIVE)) | |
652 | { | |
653 | BGP_EVENT_ADD (peer, TCP_connection_open_failed); | |
654 | return 0; | |
655 | } | |
656 | ||
657 | status = bgp_connect (peer); | |
658 | ||
659 | switch (status) | |
660 | { | |
661 | case connect_error: | |
662 | if (BGP_DEBUG (fsm, FSM)) | |
8c2e200a | 663 | plog_debug (peer->log, "%s [FSM] Connect error", peer->host); |
718e3744 | 664 | BGP_EVENT_ADD (peer, TCP_connection_open_failed); |
665 | break; | |
666 | case connect_success: | |
667 | if (BGP_DEBUG (fsm, FSM)) | |
8c2e200a | 668 | plog_debug (peer->log, "%s [FSM] Connect immediately success", |
eb821189 | 669 | peer->host); |
718e3744 | 670 | BGP_EVENT_ADD (peer, TCP_connection_open); |
671 | break; | |
672 | case connect_in_progress: | |
673 | /* To check nonblocking connect, we wait until socket is | |
674 | readable or writable. */ | |
675 | if (BGP_DEBUG (fsm, FSM)) | |
8c2e200a | 676 | plog_debug (peer->log, "%s [FSM] Non blocking connect waiting result", |
eb821189 | 677 | peer->host); |
678 | if (peer->fd < 0) | |
718e3744 | 679 | { |
680 | zlog_err ("bgp_start peer's fd is negative value %d", | |
eb821189 | 681 | peer->fd); |
718e3744 | 682 | return -1; |
683 | } | |
eb821189 | 684 | BGP_READ_ON (peer->t_read, bgp_read, peer->fd); |
685 | BGP_WRITE_ON (peer->t_write, bgp_write, peer->fd); | |
718e3744 | 686 | break; |
687 | } | |
688 | return 0; | |
689 | } | |
690 | ||
691 | /* Connect retry timer is expired when the peer status is Connect. */ | |
94f2b392 | 692 | static int |
718e3744 | 693 | bgp_reconnect (struct peer *peer) |
694 | { | |
695 | bgp_stop (peer); | |
696 | bgp_start (peer); | |
697 | return 0; | |
698 | } | |
699 | ||
94f2b392 | 700 | static int |
718e3744 | 701 | bgp_fsm_open (struct peer *peer) |
702 | { | |
703 | /* Send keepalive and make keepalive timer */ | |
704 | bgp_keepalive_send (peer); | |
705 | ||
706 | /* Reset holdtimer value. */ | |
707 | BGP_TIMER_OFF (peer->t_holdtime); | |
708 | ||
709 | return 0; | |
710 | } | |
711 | ||
718e3744 | 712 | /* Keepalive send to peer. */ |
94f2b392 | 713 | static int |
718e3744 | 714 | bgp_fsm_keepalive_expire (struct peer *peer) |
715 | { | |
716 | bgp_keepalive_send (peer); | |
717 | return 0; | |
718 | } | |
719 | ||
720 | /* Hold timer expire. This is error of BGP connection. So cut the | |
721 | peer and change to Idle status. */ | |
94f2b392 | 722 | static int |
718e3744 | 723 | bgp_fsm_holdtime_expire (struct peer *peer) |
724 | { | |
725 | if (BGP_DEBUG (fsm, FSM)) | |
726 | zlog (peer->log, LOG_DEBUG, "%s [FSM] Hold timer expire", peer->host); | |
727 | ||
728 | /* Send notify to remote peer. */ | |
729 | bgp_notify_send (peer, BGP_NOTIFY_HOLD_ERR, 0); | |
730 | ||
731 | /* Sweep if it is temporary peer. */ | |
732 | if (CHECK_FLAG (peer->sflags, PEER_STATUS_ACCEPT_PEER)) | |
733 | { | |
734 | zlog_info ("%s [Event] Accepting BGP peer is deleted", peer->host); | |
735 | peer_delete (peer); | |
736 | return -1; | |
737 | } | |
738 | ||
739 | return 0; | |
740 | } | |
741 | ||
742 | /* Status goes to Established. Send keepalive packet then make first | |
743 | update information. */ | |
94f2b392 | 744 | static int |
718e3744 | 745 | bgp_establish (struct peer *peer) |
746 | { | |
747 | struct bgp_notify *notify; | |
748 | afi_t afi; | |
749 | safi_t safi; | |
93406d87 | 750 | int nsf_af_count = 0; |
718e3744 | 751 | |
752 | /* Reset capability open status flag. */ | |
753 | if (! CHECK_FLAG (peer->sflags, PEER_STATUS_CAPABILITY_OPEN)) | |
754 | SET_FLAG (peer->sflags, PEER_STATUS_CAPABILITY_OPEN); | |
755 | ||
756 | /* Clear last notification data. */ | |
757 | notify = &peer->notify; | |
758 | if (notify->data) | |
759 | XFREE (MTYPE_TMP, notify->data); | |
760 | memset (notify, 0, sizeof (struct bgp_notify)); | |
761 | ||
762 | /* Clear start timer value to default. */ | |
763 | peer->v_start = BGP_INIT_START_TIMER; | |
764 | ||
765 | /* Increment established count. */ | |
766 | peer->established++; | |
767 | bgp_fsm_change_status (peer, Established); | |
848973c7 | 768 | |
769 | /* bgp log-neighbor-changes of neighbor Up */ | |
770 | if (bgp_flag_check (peer->bgp, BGP_FLAG_LOG_NEIGHBOR_CHANGES)) | |
771 | zlog_info ("%%ADJCHANGE: neighbor %s Up", peer->host); | |
772 | ||
93406d87 | 773 | /* graceful restart */ |
774 | UNSET_FLAG (peer->sflags, PEER_STATUS_NSF_WAIT); | |
775 | for (afi = AFI_IP ; afi < AFI_MAX ; afi++) | |
776 | for (safi = SAFI_UNICAST ; safi < SAFI_UNICAST_MULTICAST ; safi++) | |
777 | { | |
778 | if (peer->afc_nego[afi][safi] | |
779 | && CHECK_FLAG (peer->cap, PEER_CAP_RESTART_ADV) | |
780 | && CHECK_FLAG (peer->af_cap[afi][safi], PEER_CAP_RESTART_AF_RCV)) | |
781 | { | |
782 | if (peer->nsf[afi][safi] | |
783 | && ! CHECK_FLAG (peer->af_cap[afi][safi], PEER_CAP_RESTART_AF_PRESERVE_RCV)) | |
784 | bgp_clear_stale_route (peer, afi, safi); | |
785 | ||
786 | peer->nsf[afi][safi] = 1; | |
787 | nsf_af_count++; | |
788 | } | |
789 | else | |
790 | { | |
791 | if (peer->nsf[afi][safi]) | |
792 | bgp_clear_stale_route (peer, afi, safi); | |
793 | peer->nsf[afi][safi] = 0; | |
794 | } | |
795 | } | |
796 | ||
797 | if (nsf_af_count) | |
798 | SET_FLAG (peer->sflags, PEER_STATUS_NSF_MODE); | |
799 | else | |
800 | { | |
801 | UNSET_FLAG (peer->sflags, PEER_STATUS_NSF_MODE); | |
802 | if (peer->t_gr_stale) | |
803 | { | |
804 | BGP_TIMER_OFF (peer->t_gr_stale); | |
805 | if (BGP_DEBUG (events, EVENTS)) | |
806 | zlog_debug ("%s graceful restart stalepath timer stopped", peer->host); | |
807 | } | |
808 | } | |
809 | ||
810 | if (peer->t_gr_restart) | |
811 | { | |
812 | BGP_TIMER_OFF (peer->t_gr_restart); | |
813 | if (BGP_DEBUG (events, EVENTS)) | |
814 | zlog_debug ("%s graceful restart timer stopped", peer->host); | |
815 | } | |
816 | ||
718e3744 | 817 | #ifdef HAVE_SNMP |
818 | bgpTrapEstablished (peer); | |
819 | #endif /* HAVE_SNMP */ | |
820 | ||
821 | /* Reset uptime, send keepalive, send current table. */ | |
822 | bgp_uptime_reset (peer); | |
823 | ||
824 | /* Send route-refresh when ORF is enabled */ | |
825 | for (afi = AFI_IP ; afi < AFI_MAX ; afi++) | |
826 | for (safi = SAFI_UNICAST ; safi < SAFI_MAX ; safi++) | |
827 | if (CHECK_FLAG (peer->af_cap[afi][safi], PEER_CAP_ORF_PREFIX_SM_ADV)) | |
828 | { | |
829 | if (CHECK_FLAG (peer->af_cap[afi][safi], PEER_CAP_ORF_PREFIX_RM_RCV)) | |
830 | bgp_route_refresh_send (peer, afi, safi, ORF_TYPE_PREFIX, | |
831 | REFRESH_IMMEDIATE, 0); | |
832 | else if (CHECK_FLAG (peer->af_cap[afi][safi], PEER_CAP_ORF_PREFIX_RM_OLD_RCV)) | |
833 | bgp_route_refresh_send (peer, afi, safi, ORF_TYPE_PREFIX_OLD, | |
834 | REFRESH_IMMEDIATE, 0); | |
835 | } | |
836 | ||
837 | if (peer->v_keepalive) | |
838 | bgp_keepalive_send (peer); | |
839 | ||
840 | /* First update is deferred until ORF or ROUTE-REFRESH is received */ | |
841 | for (afi = AFI_IP ; afi < AFI_MAX ; afi++) | |
842 | for (safi = SAFI_UNICAST ; safi < SAFI_MAX ; safi++) | |
843 | if (CHECK_FLAG (peer->af_cap[afi][safi], PEER_CAP_ORF_PREFIX_RM_ADV)) | |
844 | if (CHECK_FLAG (peer->af_cap[afi][safi], PEER_CAP_ORF_PREFIX_SM_RCV) | |
845 | || CHECK_FLAG (peer->af_cap[afi][safi], PEER_CAP_ORF_PREFIX_SM_OLD_RCV)) | |
846 | SET_FLAG (peer->af_sflags[afi][safi], PEER_STATUS_ORF_WAIT_REFRESH); | |
847 | ||
848 | bgp_announce_route_all (peer); | |
849 | ||
850 | BGP_TIMER_ON (peer->t_routeadv, bgp_routeadv_timer, 1); | |
851 | ||
852 | return 0; | |
853 | } | |
854 | ||
855 | /* Keepalive packet is received. */ | |
94f2b392 | 856 | static int |
718e3744 | 857 | bgp_fsm_keepalive (struct peer *peer) |
858 | { | |
859 | /* peer count update */ | |
860 | peer->keepalive_in++; | |
861 | ||
862 | BGP_TIMER_OFF (peer->t_holdtime); | |
863 | return 0; | |
864 | } | |
865 | ||
866 | /* Update packet is received. */ | |
94f2b392 | 867 | static int |
718e3744 | 868 | bgp_fsm_update (struct peer *peer) |
869 | { | |
870 | BGP_TIMER_OFF (peer->t_holdtime); | |
871 | return 0; | |
872 | } | |
873 | ||
874 | /* This is empty event. */ | |
94f2b392 | 875 | static int |
718e3744 | 876 | bgp_ignore (struct peer *peer) |
877 | { | |
878 | if (BGP_DEBUG (fsm, FSM)) | |
879 | zlog (peer->log, LOG_DEBUG, "%s [FSM] bgp_ignore called", peer->host); | |
880 | return 0; | |
881 | } | |
882 | \f | |
883 | /* Finite State Machine structure */ | |
884 | struct { | |
885 | int (*func) (); | |
886 | int next_state; | |
887 | } FSM [BGP_STATUS_MAX - 1][BGP_EVENTS_MAX - 1] = | |
888 | { | |
889 | { | |
890 | /* Idle state: In Idle state, all events other than BGP_Start is | |
891 | ignored. With BGP_Start event, finite state machine calls | |
892 | bgp_start(). */ | |
893 | {bgp_start, Connect}, /* BGP_Start */ | |
894 | {bgp_stop, Idle}, /* BGP_Stop */ | |
895 | {bgp_stop, Idle}, /* TCP_connection_open */ | |
896 | {bgp_stop, Idle}, /* TCP_connection_closed */ | |
897 | {bgp_ignore, Idle}, /* TCP_connection_open_failed */ | |
898 | {bgp_stop, Idle}, /* TCP_fatal_error */ | |
899 | {bgp_ignore, Idle}, /* ConnectRetry_timer_expired */ | |
900 | {bgp_ignore, Idle}, /* Hold_Timer_expired */ | |
901 | {bgp_ignore, Idle}, /* KeepAlive_timer_expired */ | |
902 | {bgp_ignore, Idle}, /* Receive_OPEN_message */ | |
903 | {bgp_ignore, Idle}, /* Receive_KEEPALIVE_message */ | |
904 | {bgp_ignore, Idle}, /* Receive_UPDATE_message */ | |
905 | {bgp_ignore, Idle}, /* Receive_NOTIFICATION_message */ | |
906 | }, | |
907 | { | |
908 | /* Connect */ | |
909 | {bgp_ignore, Connect}, /* BGP_Start */ | |
910 | {bgp_stop, Idle}, /* BGP_Stop */ | |
911 | {bgp_connect_success, OpenSent}, /* TCP_connection_open */ | |
912 | {bgp_stop, Idle}, /* TCP_connection_closed */ | |
913 | {bgp_connect_fail, Active}, /* TCP_connection_open_failed */ | |
914 | {bgp_connect_fail, Idle}, /* TCP_fatal_error */ | |
915 | {bgp_reconnect, Connect}, /* ConnectRetry_timer_expired */ | |
916 | {bgp_ignore, Idle}, /* Hold_Timer_expired */ | |
917 | {bgp_ignore, Idle}, /* KeepAlive_timer_expired */ | |
918 | {bgp_ignore, Idle}, /* Receive_OPEN_message */ | |
919 | {bgp_ignore, Idle}, /* Receive_KEEPALIVE_message */ | |
920 | {bgp_ignore, Idle}, /* Receive_UPDATE_message */ | |
921 | {bgp_stop, Idle}, /* Receive_NOTIFICATION_message */ | |
922 | }, | |
923 | { | |
924 | /* Active, */ | |
925 | {bgp_ignore, Active}, /* BGP_Start */ | |
926 | {bgp_stop, Idle}, /* BGP_Stop */ | |
927 | {bgp_connect_success, OpenSent}, /* TCP_connection_open */ | |
928 | {bgp_stop, Idle}, /* TCP_connection_closed */ | |
929 | {bgp_ignore, Active}, /* TCP_connection_open_failed */ | |
930 | {bgp_ignore, Idle}, /* TCP_fatal_error */ | |
931 | {bgp_start, Connect}, /* ConnectRetry_timer_expired */ | |
932 | {bgp_ignore, Idle}, /* Hold_Timer_expired */ | |
933 | {bgp_ignore, Idle}, /* KeepAlive_timer_expired */ | |
934 | {bgp_ignore, Idle}, /* Receive_OPEN_message */ | |
935 | {bgp_ignore, Idle}, /* Receive_KEEPALIVE_message */ | |
936 | {bgp_ignore, Idle}, /* Receive_UPDATE_message */ | |
937 | {bgp_stop_with_error, Idle}, /* Receive_NOTIFICATION_message */ | |
938 | }, | |
939 | { | |
940 | /* OpenSent, */ | |
941 | {bgp_ignore, OpenSent}, /* BGP_Start */ | |
942 | {bgp_stop, Idle}, /* BGP_Stop */ | |
943 | {bgp_stop, Idle}, /* TCP_connection_open */ | |
944 | {bgp_stop, Active}, /* TCP_connection_closed */ | |
945 | {bgp_ignore, Idle}, /* TCP_connection_open_failed */ | |
946 | {bgp_stop, Idle}, /* TCP_fatal_error */ | |
947 | {bgp_ignore, Idle}, /* ConnectRetry_timer_expired */ | |
948 | {bgp_fsm_holdtime_expire, Idle}, /* Hold_Timer_expired */ | |
949 | {bgp_ignore, Idle}, /* KeepAlive_timer_expired */ | |
950 | {bgp_fsm_open, OpenConfirm}, /* Receive_OPEN_message */ | |
951 | {bgp_ignore, Idle}, /* Receive_KEEPALIVE_message */ | |
952 | {bgp_ignore, Idle}, /* Receive_UPDATE_message */ | |
953 | {bgp_stop_with_error, Idle}, /* Receive_NOTIFICATION_message */ | |
954 | }, | |
955 | { | |
956 | /* OpenConfirm, */ | |
957 | {bgp_ignore, OpenConfirm}, /* BGP_Start */ | |
958 | {bgp_stop, Idle}, /* BGP_Stop */ | |
959 | {bgp_stop, Idle}, /* TCP_connection_open */ | |
960 | {bgp_stop, Idle}, /* TCP_connection_closed */ | |
961 | {bgp_stop, Idle}, /* TCP_connection_open_failed */ | |
962 | {bgp_stop, Idle}, /* TCP_fatal_error */ | |
963 | {bgp_ignore, Idle}, /* ConnectRetry_timer_expired */ | |
964 | {bgp_fsm_holdtime_expire, Idle}, /* Hold_Timer_expired */ | |
965 | {bgp_ignore, OpenConfirm}, /* KeepAlive_timer_expired */ | |
966 | {bgp_ignore, Idle}, /* Receive_OPEN_message */ | |
967 | {bgp_establish, Established}, /* Receive_KEEPALIVE_message */ | |
968 | {bgp_ignore, Idle}, /* Receive_UPDATE_message */ | |
969 | {bgp_stop_with_error, Idle}, /* Receive_NOTIFICATION_message */ | |
970 | }, | |
971 | { | |
972 | /* Established, */ | |
973 | {bgp_ignore, Established}, /* BGP_Start */ | |
974 | {bgp_stop, Idle}, /* BGP_Stop */ | |
975 | {bgp_stop, Idle}, /* TCP_connection_open */ | |
976 | {bgp_stop, Idle}, /* TCP_connection_closed */ | |
977 | {bgp_ignore, Idle}, /* TCP_connection_open_failed */ | |
978 | {bgp_stop, Idle}, /* TCP_fatal_error */ | |
979 | {bgp_ignore, Idle}, /* ConnectRetry_timer_expired */ | |
980 | {bgp_fsm_holdtime_expire, Idle}, /* Hold_Timer_expired */ | |
981 | {bgp_fsm_keepalive_expire, Established}, /* KeepAlive_timer_expired */ | |
982 | {bgp_stop, Idle}, /* Receive_OPEN_message */ | |
983 | {bgp_fsm_keepalive, Established}, /* Receive_KEEPALIVE_message */ | |
984 | {bgp_fsm_update, Established}, /* Receive_UPDATE_message */ | |
985 | {bgp_stop_with_error, Idle}, /* Receive_NOTIFICATION_message */ | |
986 | }, | |
987 | }; | |
988 | ||
fd79ac91 | 989 | static const char *bgp_event_str[] = |
718e3744 | 990 | { |
991 | NULL, | |
992 | "BGP_Start", | |
993 | "BGP_Stop", | |
994 | "TCP_connection_open", | |
995 | "TCP_connection_closed", | |
996 | "TCP_connection_open_failed", | |
997 | "TCP_fatal_error", | |
998 | "ConnectRetry_timer_expired", | |
999 | "Hold_Timer_expired", | |
1000 | "KeepAlive_timer_expired", | |
1001 | "Receive_OPEN_message", | |
1002 | "Receive_KEEPALIVE_message", | |
1003 | "Receive_UPDATE_message", | |
1004 | "Receive_NOTIFICATION_message" | |
1005 | }; | |
1006 | ||
1007 | /* Execute event process. */ | |
1008 | int | |
1009 | bgp_event (struct thread *thread) | |
1010 | { | |
1011 | int ret; | |
1012 | int event; | |
1013 | int next; | |
1014 | struct peer *peer; | |
1015 | ||
1016 | peer = THREAD_ARG (thread); | |
1017 | event = THREAD_VAL (thread); | |
1018 | ||
1019 | /* Logging this event. */ | |
1020 | next = FSM [peer->status -1][event - 1].next_state; | |
1021 | ||
1022 | if (BGP_DEBUG (fsm, FSM)) | |
8c2e200a | 1023 | plog_debug (peer->log, "%s [FSM] %s (%s->%s)", peer->host, |
718e3744 | 1024 | bgp_event_str[event], |
1025 | LOOKUP (bgp_status_msg, peer->status), | |
1026 | LOOKUP (bgp_status_msg, next)); | |
718e3744 | 1027 | |
1028 | /* Call function. */ | |
1029 | ret = (*(FSM [peer->status - 1][event - 1].func))(peer); | |
1030 | ||
1031 | /* When function do not want proceed next job return -1. */ | |
200df115 | 1032 | if (ret >= 0) |
1033 | { | |
1034 | /* If status is changed. */ | |
1035 | if (next != peer->status) | |
1036 | bgp_fsm_change_status (peer, next); | |
718e3744 | 1037 | |
200df115 | 1038 | /* Make sure timer is set. */ |
1039 | bgp_timer_set (peer); | |
1040 | } | |
1041 | ||
1042 | peer_unlock (peer); /* bgp-event peer reference */ | |
1043 | return ret; | |
718e3744 | 1044 | } |