]>
Commit | Line | Data |
---|---|---|
718e3744 | 1 | /* BGP packet management routine. |
2 | Copyright (C) 1999 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 | |
17 | along with GNU Zebra; see the file COPYING. If not, write to the Free | |
18 | Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA | |
19 | 02111-1307, USA. */ | |
20 | ||
21 | #include <zebra.h> | |
22 | ||
23 | #include "thread.h" | |
24 | #include "stream.h" | |
25 | #include "network.h" | |
26 | #include "prefix.h" | |
27 | #include "command.h" | |
28 | #include "log.h" | |
29 | #include "memory.h" | |
30 | #include "sockunion.h" /* for inet_ntop () */ | |
31 | #include "linklist.h" | |
32 | #include "plist.h" | |
33 | ||
34 | #include "bgpd/bgpd.h" | |
35 | #include "bgpd/bgp_table.h" | |
36 | #include "bgpd/bgp_dump.h" | |
37 | #include "bgpd/bgp_attr.h" | |
38 | #include "bgpd/bgp_debug.h" | |
39 | #include "bgpd/bgp_fsm.h" | |
40 | #include "bgpd/bgp_route.h" | |
41 | #include "bgpd/bgp_packet.h" | |
42 | #include "bgpd/bgp_open.h" | |
43 | #include "bgpd/bgp_aspath.h" | |
44 | #include "bgpd/bgp_community.h" | |
45 | #include "bgpd/bgp_ecommunity.h" | |
46 | #include "bgpd/bgp_network.h" | |
47 | #include "bgpd/bgp_mplsvpn.h" | |
48 | #include "bgpd/bgp_advertise.h" | |
93406d87 | 49 | #include "bgpd/bgp_vty.h" |
718e3744 | 50 | |
51 | int stream_put_prefix (struct stream *, struct prefix *); | |
52 | \f | |
53 | /* Set up BGP packet marker and packet type. */ | |
54 | static int | |
55 | bgp_packet_set_marker (struct stream *s, u_char type) | |
56 | { | |
57 | int i; | |
58 | ||
59 | /* Fill in marker. */ | |
60 | for (i = 0; i < BGP_MARKER_SIZE; i++) | |
61 | stream_putc (s, 0xff); | |
62 | ||
63 | /* Dummy total length. This field is should be filled in later on. */ | |
64 | stream_putw (s, 0); | |
65 | ||
66 | /* BGP packet type. */ | |
67 | stream_putc (s, type); | |
68 | ||
69 | /* Return current stream size. */ | |
9985f83c | 70 | return stream_get_endp (s); |
718e3744 | 71 | } |
72 | ||
73 | /* Set BGP packet header size entry. If size is zero then use current | |
74 | stream size. */ | |
75 | static int | |
76 | bgp_packet_set_size (struct stream *s) | |
77 | { | |
78 | int cp; | |
79 | ||
80 | /* Preserve current pointer. */ | |
9985f83c | 81 | cp = stream_get_endp (s); |
82 | stream_putw_at (s, BGP_MARKER_SIZE, cp); | |
718e3744 | 83 | |
84 | return cp; | |
85 | } | |
86 | ||
87 | /* Add new packet to the peer. */ | |
94f2b392 | 88 | static void |
718e3744 | 89 | bgp_packet_add (struct peer *peer, struct stream *s) |
90 | { | |
91 | /* Add packet to the end of list. */ | |
92 | stream_fifo_push (peer->obuf, s); | |
93 | } | |
94 | ||
95 | /* Free first packet. */ | |
94f2b392 | 96 | static void |
718e3744 | 97 | bgp_packet_delete (struct peer *peer) |
98 | { | |
99 | stream_free (stream_fifo_pop (peer->obuf)); | |
100 | } | |
101 | ||
718e3744 | 102 | /* Check file descriptor whether connect is established. */ |
103 | static void | |
104 | bgp_connect_check (struct peer *peer) | |
105 | { | |
106 | int status; | |
5228ad27 | 107 | socklen_t slen; |
718e3744 | 108 | int ret; |
109 | ||
110 | /* Anyway I have to reset read and write thread. */ | |
111 | BGP_READ_OFF (peer->t_read); | |
112 | BGP_WRITE_OFF (peer->t_write); | |
113 | ||
114 | /* Check file descriptor. */ | |
115 | slen = sizeof (status); | |
eb821189 | 116 | ret = getsockopt(peer->fd, SOL_SOCKET, SO_ERROR, (void *) &status, &slen); |
718e3744 | 117 | |
118 | /* If getsockopt is fail, this is fatal error. */ | |
119 | if (ret < 0) | |
120 | { | |
121 | zlog (peer->log, LOG_INFO, "can't get sockopt for nonblocking connect"); | |
122 | BGP_EVENT_ADD (peer, TCP_fatal_error); | |
123 | return; | |
124 | } | |
125 | ||
126 | /* When status is 0 then TCP connection is established. */ | |
127 | if (status == 0) | |
128 | { | |
129 | BGP_EVENT_ADD (peer, TCP_connection_open); | |
130 | } | |
131 | else | |
132 | { | |
133 | if (BGP_DEBUG (events, EVENTS)) | |
6b51474d | 134 | plog_debug (peer->log, "%s [Event] Connect failed (%s)", |
6099b3b5 | 135 | peer->host, safe_strerror (errno)); |
718e3744 | 136 | BGP_EVENT_ADD (peer, TCP_connection_open_failed); |
137 | } | |
138 | } | |
139 | ||
140 | /* Make BGP update packet. */ | |
94f2b392 | 141 | static struct stream * |
718e3744 | 142 | bgp_update_packet (struct peer *peer, afi_t afi, safi_t safi) |
143 | { | |
144 | struct stream *s; | |
145 | struct bgp_adj_out *adj; | |
146 | struct bgp_advertise *adv; | |
147 | struct stream *packet; | |
148 | struct bgp_node *rn = NULL; | |
149 | struct bgp_info *binfo = NULL; | |
150 | bgp_size_t total_attr_len = 0; | |
151 | unsigned long pos; | |
152 | char buf[BUFSIZ]; | |
718e3744 | 153 | |
154 | s = peer->work; | |
155 | stream_reset (s); | |
156 | ||
157 | adv = FIFO_HEAD (&peer->sync[afi][safi]->update); | |
158 | ||
159 | while (adv) | |
160 | { | |
ed3ebfa3 PJ |
161 | assert (adv->rn); |
162 | rn = adv->rn; | |
718e3744 | 163 | adj = adv->adj; |
164 | if (adv->binfo) | |
165 | binfo = adv->binfo; | |
718e3744 | 166 | |
167 | /* When remaining space can't include NLRI and it's length. */ | |
ed3ebfa3 | 168 | if (STREAM_REMAIN (s) <= BGP_NLRI_LENGTH + PSIZE (rn->p.prefixlen)) |
718e3744 | 169 | break; |
170 | ||
171 | /* If packet is empty, set attribute. */ | |
172 | if (stream_empty (s)) | |
173 | { | |
a3b6ea56 PJ |
174 | struct prefix_rd *prd = NULL; |
175 | u_char *tag = NULL; | |
ed3ebfa3 | 176 | struct peer *from = NULL; |
a3b6ea56 PJ |
177 | |
178 | if (rn->prn) | |
179 | prd = (struct prefix_rd *) &rn->prn->p; | |
d3ddb22e | 180 | if (binfo) |
ed3ebfa3 | 181 | { |
ed3ebfa3 | 182 | from = binfo->peer; |
d3ddb22e GT |
183 | if (binfo->extra) |
184 | tag = binfo->extra->tag; | |
ed3ebfa3 | 185 | } |
a3b6ea56 | 186 | |
718e3744 | 187 | bgp_packet_set_marker (s, BGP_MSG_UPDATE); |
188 | stream_putw (s, 0); | |
9985f83c | 189 | pos = stream_get_endp (s); |
718e3744 | 190 | stream_putw (s, 0); |
5228ad27 | 191 | total_attr_len = bgp_packet_attribute (NULL, peer, s, |
192 | adv->baa->attr, | |
193 | &rn->p, afi, safi, | |
ed3ebfa3 | 194 | from, prd, tag); |
718e3744 | 195 | stream_putw_at (s, pos, total_attr_len); |
196 | } | |
197 | ||
198 | if (afi == AFI_IP && safi == SAFI_UNICAST) | |
199 | stream_put_prefix (s, &rn->p); | |
200 | ||
201 | if (BGP_DEBUG (update, UPDATE_OUT)) | |
6b51474d | 202 | zlog (peer->log, LOG_DEBUG, "%s send UPDATE %s/%d", |
718e3744 | 203 | peer->host, |
204 | inet_ntop (rn->p.family, &(rn->p.u.prefix), buf, BUFSIZ), | |
205 | rn->p.prefixlen); | |
206 | ||
207 | /* Synchnorize attribute. */ | |
208 | if (adj->attr) | |
f6f434b2 | 209 | bgp_attr_unintern (&adj->attr); |
718e3744 | 210 | else |
211 | peer->scount[afi][safi]++; | |
212 | ||
213 | adj->attr = bgp_attr_intern (adv->baa->attr); | |
214 | ||
215 | adv = bgp_advertise_clean (peer, adj, afi, safi); | |
216 | ||
217 | if (! (afi == AFI_IP && safi == SAFI_UNICAST)) | |
218 | break; | |
219 | } | |
220 | ||
221 | if (! stream_empty (s)) | |
222 | { | |
223 | bgp_packet_set_size (s); | |
e83e2080 | 224 | packet = stream_dup (s); |
718e3744 | 225 | bgp_packet_add (peer, packet); |
eb821189 | 226 | BGP_WRITE_ON (peer->t_write, bgp_write, peer->fd); |
718e3744 | 227 | stream_reset (s); |
228 | return packet; | |
229 | } | |
230 | return NULL; | |
93406d87 | 231 | } |
232 | ||
94f2b392 | 233 | static struct stream * |
93406d87 | 234 | bgp_update_packet_eor (struct peer *peer, afi_t afi, safi_t safi) |
235 | { | |
236 | struct stream *s; | |
237 | struct stream *packet; | |
238 | ||
750e8146 PJ |
239 | if (DISABLE_BGP_ANNOUNCE) |
240 | return NULL; | |
93406d87 | 241 | |
242 | if (BGP_DEBUG (normal, NORMAL)) | |
243 | zlog_debug ("send End-of-RIB for %s to %s", afi_safi_print (afi, safi), peer->host); | |
244 | ||
245 | s = stream_new (BGP_MAX_PACKET_SIZE); | |
246 | ||
247 | /* Make BGP update packet. */ | |
248 | bgp_packet_set_marker (s, BGP_MSG_UPDATE); | |
249 | ||
250 | /* Unfeasible Routes Length */ | |
251 | stream_putw (s, 0); | |
718e3744 | 252 | |
93406d87 | 253 | if (afi == AFI_IP && safi == SAFI_UNICAST) |
254 | { | |
255 | /* Total Path Attribute Length */ | |
256 | stream_putw (s, 0); | |
257 | } | |
258 | else | |
259 | { | |
260 | /* Total Path Attribute Length */ | |
261 | stream_putw (s, 6); | |
262 | stream_putc (s, BGP_ATTR_FLAG_OPTIONAL); | |
263 | stream_putc (s, BGP_ATTR_MP_UNREACH_NLRI); | |
264 | stream_putc (s, 3); | |
265 | stream_putw (s, afi); | |
266 | stream_putc (s, safi); | |
267 | } | |
268 | ||
269 | bgp_packet_set_size (s); | |
e83e2080 | 270 | packet = stream_dup (s); |
93406d87 | 271 | bgp_packet_add (peer, packet); |
272 | stream_free (s); | |
273 | return packet; | |
718e3744 | 274 | } |
275 | ||
276 | /* Make BGP withdraw packet. */ | |
94f2b392 | 277 | static struct stream * |
718e3744 | 278 | bgp_withdraw_packet (struct peer *peer, afi_t afi, safi_t safi) |
279 | { | |
280 | struct stream *s; | |
281 | struct stream *packet; | |
282 | struct bgp_adj_out *adj; | |
283 | struct bgp_advertise *adv; | |
284 | struct bgp_node *rn; | |
285 | unsigned long pos; | |
286 | bgp_size_t unfeasible_len; | |
287 | bgp_size_t total_attr_len; | |
288 | char buf[BUFSIZ]; | |
718e3744 | 289 | |
290 | s = peer->work; | |
291 | stream_reset (s); | |
292 | ||
293 | while ((adv = FIFO_HEAD (&peer->sync[afi][safi]->withdraw)) != NULL) | |
294 | { | |
ed3ebfa3 | 295 | assert (adv->rn); |
718e3744 | 296 | adj = adv->adj; |
297 | rn = adv->rn; | |
718e3744 | 298 | |
299 | if (STREAM_REMAIN (s) | |
4372df71 | 300 | < (BGP_NLRI_LENGTH + BGP_TOTAL_ATTR_LEN + PSIZE (rn->p.prefixlen))) |
718e3744 | 301 | break; |
302 | ||
303 | if (stream_empty (s)) | |
304 | { | |
305 | bgp_packet_set_marker (s, BGP_MSG_UPDATE); | |
306 | stream_putw (s, 0); | |
307 | } | |
308 | ||
309 | if (afi == AFI_IP && safi == SAFI_UNICAST) | |
310 | stream_put_prefix (s, &rn->p); | |
311 | else | |
312 | { | |
a3b6ea56 PJ |
313 | struct prefix_rd *prd = NULL; |
314 | ||
315 | if (rn->prn) | |
316 | prd = (struct prefix_rd *) &rn->prn->p; | |
9985f83c | 317 | pos = stream_get_endp (s); |
718e3744 | 318 | stream_putw (s, 0); |
319 | total_attr_len | |
320 | = bgp_packet_withdraw (peer, s, &rn->p, afi, safi, prd, NULL); | |
321 | ||
322 | /* Set total path attribute length. */ | |
323 | stream_putw_at (s, pos, total_attr_len); | |
324 | } | |
325 | ||
326 | if (BGP_DEBUG (update, UPDATE_OUT)) | |
6b51474d | 327 | zlog (peer->log, LOG_DEBUG, "%s send UPDATE %s/%d -- unreachable", |
718e3744 | 328 | peer->host, |
329 | inet_ntop (rn->p.family, &(rn->p.u.prefix), buf, BUFSIZ), | |
330 | rn->p.prefixlen); | |
331 | ||
332 | peer->scount[afi][safi]--; | |
333 | ||
334 | bgp_adj_out_remove (rn, adj, peer, afi, safi); | |
335 | bgp_unlock_node (rn); | |
336 | ||
337 | if (! (afi == AFI_IP && safi == SAFI_UNICAST)) | |
338 | break; | |
339 | } | |
340 | ||
341 | if (! stream_empty (s)) | |
342 | { | |
343 | if (afi == AFI_IP && safi == SAFI_UNICAST) | |
344 | { | |
345 | unfeasible_len | |
9985f83c | 346 | = stream_get_endp (s) - BGP_HEADER_SIZE - BGP_UNFEASIBLE_LEN; |
718e3744 | 347 | stream_putw_at (s, BGP_HEADER_SIZE, unfeasible_len); |
348 | stream_putw (s, 0); | |
349 | } | |
350 | bgp_packet_set_size (s); | |
e83e2080 | 351 | packet = stream_dup (s); |
718e3744 | 352 | bgp_packet_add (peer, packet); |
353 | stream_reset (s); | |
354 | return packet; | |
355 | } | |
356 | ||
357 | return NULL; | |
358 | } | |
359 | ||
360 | void | |
361 | bgp_default_update_send (struct peer *peer, struct attr *attr, | |
362 | afi_t afi, safi_t safi, struct peer *from) | |
363 | { | |
364 | struct stream *s; | |
365 | struct stream *packet; | |
366 | struct prefix p; | |
367 | unsigned long pos; | |
368 | bgp_size_t total_attr_len; | |
369 | char attrstr[BUFSIZ]; | |
370 | char buf[BUFSIZ]; | |
371 | ||
750e8146 PJ |
372 | if (DISABLE_BGP_ANNOUNCE) |
373 | return; | |
718e3744 | 374 | |
375 | if (afi == AFI_IP) | |
376 | str2prefix ("0.0.0.0/0", &p); | |
377 | #ifdef HAVE_IPV6 | |
378 | else | |
379 | str2prefix ("::/0", &p); | |
380 | #endif /* HAVE_IPV6 */ | |
381 | ||
382 | /* Logging the attribute. */ | |
383 | if (BGP_DEBUG (update, UPDATE_OUT)) | |
384 | { | |
385 | bgp_dump_attr (peer, attr, attrstr, BUFSIZ); | |
6b51474d | 386 | zlog (peer->log, LOG_DEBUG, "%s send UPDATE %s/%d %s", |
718e3744 | 387 | peer->host, inet_ntop(p.family, &(p.u.prefix), buf, BUFSIZ), |
388 | p.prefixlen, attrstr); | |
389 | } | |
390 | ||
391 | s = stream_new (BGP_MAX_PACKET_SIZE); | |
392 | ||
393 | /* Make BGP update packet. */ | |
394 | bgp_packet_set_marker (s, BGP_MSG_UPDATE); | |
395 | ||
396 | /* Unfeasible Routes Length. */ | |
397 | stream_putw (s, 0); | |
398 | ||
399 | /* Make place for total attribute length. */ | |
9985f83c | 400 | pos = stream_get_endp (s); |
718e3744 | 401 | stream_putw (s, 0); |
402 | total_attr_len = bgp_packet_attribute (NULL, peer, s, attr, &p, afi, safi, from, NULL, NULL); | |
403 | ||
404 | /* Set Total Path Attribute Length. */ | |
405 | stream_putw_at (s, pos, total_attr_len); | |
406 | ||
407 | /* NLRI set. */ | |
408 | if (p.family == AF_INET && safi == SAFI_UNICAST) | |
409 | stream_put_prefix (s, &p); | |
410 | ||
411 | /* Set size. */ | |
412 | bgp_packet_set_size (s); | |
413 | ||
e83e2080 | 414 | packet = stream_dup (s); |
718e3744 | 415 | stream_free (s); |
416 | ||
417 | /* Dump packet if debug option is set. */ | |
418 | #ifdef DEBUG | |
2d74db55 | 419 | /* bgp_packet_dump (packet); */ |
718e3744 | 420 | #endif /* DEBUG */ |
421 | ||
422 | /* Add packet to the peer. */ | |
423 | bgp_packet_add (peer, packet); | |
424 | ||
eb821189 | 425 | BGP_WRITE_ON (peer->t_write, bgp_write, peer->fd); |
718e3744 | 426 | } |
427 | ||
428 | void | |
429 | bgp_default_withdraw_send (struct peer *peer, afi_t afi, safi_t safi) | |
430 | { | |
431 | struct stream *s; | |
432 | struct stream *packet; | |
433 | struct prefix p; | |
434 | unsigned long pos; | |
435 | unsigned long cp; | |
436 | bgp_size_t unfeasible_len; | |
437 | bgp_size_t total_attr_len; | |
438 | char buf[BUFSIZ]; | |
439 | ||
750e8146 PJ |
440 | if (DISABLE_BGP_ANNOUNCE) |
441 | return; | |
718e3744 | 442 | |
443 | if (afi == AFI_IP) | |
444 | str2prefix ("0.0.0.0/0", &p); | |
445 | #ifdef HAVE_IPV6 | |
446 | else | |
447 | str2prefix ("::/0", &p); | |
448 | #endif /* HAVE_IPV6 */ | |
449 | ||
450 | total_attr_len = 0; | |
451 | pos = 0; | |
452 | ||
453 | if (BGP_DEBUG (update, UPDATE_OUT)) | |
6b51474d | 454 | zlog (peer->log, LOG_DEBUG, "%s send UPDATE %s/%d -- unreachable", |
718e3744 | 455 | peer->host, inet_ntop(p.family, &(p.u.prefix), buf, BUFSIZ), |
456 | p.prefixlen); | |
457 | ||
458 | s = stream_new (BGP_MAX_PACKET_SIZE); | |
459 | ||
460 | /* Make BGP update packet. */ | |
461 | bgp_packet_set_marker (s, BGP_MSG_UPDATE); | |
462 | ||
463 | /* Unfeasible Routes Length. */; | |
9985f83c | 464 | cp = stream_get_endp (s); |
718e3744 | 465 | stream_putw (s, 0); |
466 | ||
467 | /* Withdrawn Routes. */ | |
468 | if (p.family == AF_INET && safi == SAFI_UNICAST) | |
469 | { | |
470 | stream_put_prefix (s, &p); | |
471 | ||
9985f83c | 472 | unfeasible_len = stream_get_endp (s) - cp - 2; |
718e3744 | 473 | |
474 | /* Set unfeasible len. */ | |
475 | stream_putw_at (s, cp, unfeasible_len); | |
476 | ||
477 | /* Set total path attribute length. */ | |
478 | stream_putw (s, 0); | |
479 | } | |
480 | else | |
481 | { | |
9985f83c | 482 | pos = stream_get_endp (s); |
718e3744 | 483 | stream_putw (s, 0); |
484 | total_attr_len = bgp_packet_withdraw (peer, s, &p, afi, safi, NULL, NULL); | |
485 | ||
486 | /* Set total path attribute length. */ | |
487 | stream_putw_at (s, pos, total_attr_len); | |
488 | } | |
489 | ||
490 | bgp_packet_set_size (s); | |
491 | ||
e83e2080 | 492 | packet = stream_dup (s); |
718e3744 | 493 | stream_free (s); |
494 | ||
495 | /* Add packet to the peer. */ | |
496 | bgp_packet_add (peer, packet); | |
497 | ||
eb821189 | 498 | BGP_WRITE_ON (peer->t_write, bgp_write, peer->fd); |
718e3744 | 499 | } |
500 | ||
501 | /* Get next packet to be written. */ | |
94f2b392 | 502 | static struct stream * |
718e3744 | 503 | bgp_write_packet (struct peer *peer) |
504 | { | |
505 | afi_t afi; | |
506 | safi_t safi; | |
507 | struct stream *s = NULL; | |
508 | struct bgp_advertise *adv; | |
509 | ||
510 | s = stream_fifo_head (peer->obuf); | |
511 | if (s) | |
512 | return s; | |
513 | ||
514 | for (afi = AFI_IP; afi < AFI_MAX; afi++) | |
515 | for (safi = SAFI_UNICAST; safi < SAFI_MAX; safi++) | |
516 | { | |
517 | adv = FIFO_HEAD (&peer->sync[afi][safi]->withdraw); | |
518 | if (adv) | |
519 | { | |
520 | s = bgp_withdraw_packet (peer, afi, safi); | |
521 | if (s) | |
522 | return s; | |
523 | } | |
524 | } | |
525 | ||
526 | for (afi = AFI_IP; afi < AFI_MAX; afi++) | |
527 | for (safi = SAFI_UNICAST; safi < SAFI_MAX; safi++) | |
528 | { | |
529 | adv = FIFO_HEAD (&peer->sync[afi][safi]->update); | |
530 | if (adv) | |
531 | { | |
532 | if (adv->binfo && adv->binfo->uptime < peer->synctime) | |
93406d87 | 533 | { |
534 | if (CHECK_FLAG (adv->binfo->peer->cap, PEER_CAP_RESTART_RCV) | |
535 | && CHECK_FLAG (adv->binfo->peer->cap, PEER_CAP_RESTART_ADV) | |
536 | && ! CHECK_FLAG (adv->binfo->flags, BGP_INFO_STALE) | |
537 | && safi != SAFI_MPLS_VPN) | |
538 | { | |
539 | if (CHECK_FLAG (adv->binfo->peer->af_sflags[afi][safi], | |
540 | PEER_STATUS_EOR_RECEIVED)) | |
541 | s = bgp_update_packet (peer, afi, safi); | |
542 | } | |
543 | else | |
544 | s = bgp_update_packet (peer, afi, safi); | |
545 | } | |
718e3744 | 546 | |
547 | if (s) | |
548 | return s; | |
549 | } | |
93406d87 | 550 | |
551 | if (CHECK_FLAG (peer->cap, PEER_CAP_RESTART_RCV)) | |
552 | { | |
553 | if (peer->afc_nego[afi][safi] && peer->synctime | |
554 | && ! CHECK_FLAG (peer->af_sflags[afi][safi], PEER_STATUS_EOR_SEND) | |
555 | && safi != SAFI_MPLS_VPN) | |
556 | { | |
557 | SET_FLAG (peer->af_sflags[afi][safi], PEER_STATUS_EOR_SEND); | |
558 | return bgp_update_packet_eor (peer, afi, safi); | |
559 | } | |
560 | } | |
718e3744 | 561 | } |
562 | ||
563 | return NULL; | |
564 | } | |
565 | ||
566 | /* Is there partially written packet or updates we can send right | |
567 | now. */ | |
94f2b392 | 568 | static int |
718e3744 | 569 | bgp_write_proceed (struct peer *peer) |
570 | { | |
571 | afi_t afi; | |
572 | safi_t safi; | |
573 | struct bgp_advertise *adv; | |
574 | ||
575 | if (stream_fifo_head (peer->obuf)) | |
576 | return 1; | |
577 | ||
578 | for (afi = AFI_IP; afi < AFI_MAX; afi++) | |
579 | for (safi = SAFI_UNICAST; safi < SAFI_MAX; safi++) | |
580 | if (FIFO_HEAD (&peer->sync[afi][safi]->withdraw)) | |
581 | return 1; | |
582 | ||
583 | for (afi = AFI_IP; afi < AFI_MAX; afi++) | |
584 | for (safi = SAFI_UNICAST; safi < SAFI_MAX; safi++) | |
585 | if ((adv = FIFO_HEAD (&peer->sync[afi][safi]->update)) != NULL) | |
586 | if (adv->binfo->uptime < peer->synctime) | |
587 | return 1; | |
588 | ||
589 | return 0; | |
590 | } | |
591 | ||
592 | /* Write packet to the peer. */ | |
593 | int | |
594 | bgp_write (struct thread *thread) | |
595 | { | |
596 | struct peer *peer; | |
597 | u_char type; | |
598 | struct stream *s; | |
599 | int num; | |
fd79ac91 | 600 | unsigned int count = 0; |
718e3744 | 601 | |
602 | /* Yes first of all get peer pointer. */ | |
603 | peer = THREAD_ARG (thread); | |
604 | peer->t_write = NULL; | |
605 | ||
606 | /* For non-blocking IO check. */ | |
607 | if (peer->status == Connect) | |
608 | { | |
609 | bgp_connect_check (peer); | |
610 | return 0; | |
611 | } | |
612 | ||
eac5702d SH |
613 | s = bgp_write_packet (peer); |
614 | if (!s) | |
615 | return 0; /* nothing to send */ | |
616 | ||
617 | sockopt_cork (peer->fd, 1); | |
618 | ||
619 | /* Nonblocking write until TCP output buffer is full. */ | |
620 | do | |
718e3744 | 621 | { |
622 | int writenum; | |
718e3744 | 623 | |
624 | /* Number of bytes to be sent. */ | |
625 | writenum = stream_get_endp (s) - stream_get_getp (s); | |
626 | ||
627 | /* Call write() system call. */ | |
eb821189 | 628 | num = write (peer->fd, STREAM_PNT (s), writenum); |
35398589 | 629 | if (num < 0) |
718e3744 | 630 | { |
eac5702d SH |
631 | /* write failed either retry needed or error */ |
632 | if (ERRNO_IO_RETRY(errno)) | |
633 | break; | |
634 | ||
635 | BGP_EVENT_ADD (peer, TCP_fatal_error); | |
718e3744 | 636 | return 0; |
637 | } | |
35398589 | 638 | |
718e3744 | 639 | if (num != writenum) |
640 | { | |
35398589 | 641 | /* Partial write */ |
9985f83c | 642 | stream_forward_getp (s, num); |
eac5702d | 643 | break; |
718e3744 | 644 | } |
645 | ||
646 | /* Retrieve BGP packet type. */ | |
647 | stream_set_getp (s, BGP_MARKER_SIZE + 2); | |
648 | type = stream_getc (s); | |
649 | ||
650 | switch (type) | |
651 | { | |
652 | case BGP_MSG_OPEN: | |
653 | peer->open_out++; | |
654 | break; | |
655 | case BGP_MSG_UPDATE: | |
656 | peer->update_out++; | |
657 | break; | |
658 | case BGP_MSG_NOTIFY: | |
659 | peer->notify_out++; | |
660 | /* Double start timer. */ | |
661 | peer->v_start *= 2; | |
662 | ||
663 | /* Overflow check. */ | |
664 | if (peer->v_start >= (60 * 2)) | |
665 | peer->v_start = (60 * 2); | |
666 | ||
ca058a30 | 667 | /* Flush any existing events */ |
dcdf399f | 668 | BGP_EVENT_ADD (peer, BGP_Stop); |
718e3744 | 669 | return 0; |
718e3744 | 670 | case BGP_MSG_KEEPALIVE: |
671 | peer->keepalive_out++; | |
672 | break; | |
673 | case BGP_MSG_ROUTE_REFRESH_NEW: | |
674 | case BGP_MSG_ROUTE_REFRESH_OLD: | |
675 | peer->refresh_out++; | |
676 | break; | |
677 | case BGP_MSG_CAPABILITY: | |
678 | peer->dynamic_cap_out++; | |
679 | break; | |
680 | } | |
681 | ||
682 | /* OK we send packet so delete it. */ | |
683 | bgp_packet_delete (peer); | |
718e3744 | 684 | } |
eac5702d SH |
685 | while (++count < BGP_WRITE_PACKET_MAX && |
686 | (s = bgp_write_packet (peer)) != NULL); | |
718e3744 | 687 | |
688 | if (bgp_write_proceed (peer)) | |
eb821189 | 689 | BGP_WRITE_ON (peer->t_write, bgp_write, peer->fd); |
eac5702d SH |
690 | else |
691 | sockopt_cork (peer->fd, 0); | |
718e3744 | 692 | |
693 | return 0; | |
694 | } | |
695 | ||
696 | /* This is only for sending NOTIFICATION message to neighbor. */ | |
94f2b392 | 697 | static int |
718e3744 | 698 | bgp_write_notify (struct peer *peer) |
699 | { | |
35398589 | 700 | int ret, val; |
718e3744 | 701 | u_char type; |
702 | struct stream *s; | |
703 | ||
704 | /* There should be at least one packet. */ | |
705 | s = stream_fifo_head (peer->obuf); | |
706 | if (!s) | |
707 | return 0; | |
708 | assert (stream_get_endp (s) >= BGP_HEADER_SIZE); | |
709 | ||
35398589 SH |
710 | /* Put socket in blocking mode. */ |
711 | val = fcntl (peer->fd, F_GETFL, 0); | |
712 | fcntl (peer->fd, F_SETFL, val & ~O_NONBLOCK); | |
713 | ||
eb821189 | 714 | ret = writen (peer->fd, STREAM_DATA (s), stream_get_endp (s)); |
718e3744 | 715 | if (ret <= 0) |
716 | { | |
dcdf399f | 717 | BGP_EVENT_ADD (peer, TCP_fatal_error); |
718e3744 | 718 | return 0; |
719 | } | |
720 | ||
721 | /* Retrieve BGP packet type. */ | |
722 | stream_set_getp (s, BGP_MARKER_SIZE + 2); | |
723 | type = stream_getc (s); | |
724 | ||
725 | assert (type == BGP_MSG_NOTIFY); | |
726 | ||
727 | /* Type should be notify. */ | |
728 | peer->notify_out++; | |
729 | ||
730 | /* Double start timer. */ | |
731 | peer->v_start *= 2; | |
732 | ||
733 | /* Overflow check. */ | |
734 | if (peer->v_start >= (60 * 2)) | |
735 | peer->v_start = (60 * 2); | |
736 | ||
dcdf399f | 737 | BGP_EVENT_ADD (peer, BGP_Stop); |
718e3744 | 738 | |
739 | return 0; | |
740 | } | |
741 | ||
742 | /* Make keepalive packet and send it to the peer. */ | |
743 | void | |
744 | bgp_keepalive_send (struct peer *peer) | |
745 | { | |
746 | struct stream *s; | |
747 | int length; | |
748 | ||
749 | s = stream_new (BGP_MAX_PACKET_SIZE); | |
750 | ||
751 | /* Make keepalive packet. */ | |
752 | bgp_packet_set_marker (s, BGP_MSG_KEEPALIVE); | |
753 | ||
754 | /* Set packet size. */ | |
755 | length = bgp_packet_set_size (s); | |
756 | ||
757 | /* Dump packet if debug option is set. */ | |
758 | /* bgp_packet_dump (s); */ | |
759 | ||
760 | if (BGP_DEBUG (keepalive, KEEPALIVE)) | |
6b51474d | 761 | zlog_debug ("%s sending KEEPALIVE", peer->host); |
718e3744 | 762 | if (BGP_DEBUG (normal, NORMAL)) |
6b51474d | 763 | zlog_debug ("%s send message type %d, length (incl. header) %d", |
718e3744 | 764 | peer->host, BGP_MSG_KEEPALIVE, length); |
765 | ||
766 | /* Add packet to the peer. */ | |
767 | bgp_packet_add (peer, s); | |
768 | ||
eb821189 | 769 | BGP_WRITE_ON (peer->t_write, bgp_write, peer->fd); |
718e3744 | 770 | } |
771 | ||
772 | /* Make open packet and send it to the peer. */ | |
773 | void | |
774 | bgp_open_send (struct peer *peer) | |
775 | { | |
776 | struct stream *s; | |
777 | int length; | |
778 | u_int16_t send_holdtime; | |
779 | as_t local_as; | |
780 | ||
781 | if (CHECK_FLAG (peer->config, PEER_CONFIG_TIMER)) | |
782 | send_holdtime = peer->holdtime; | |
783 | else | |
784 | send_holdtime = peer->bgp->default_holdtime; | |
785 | ||
786 | /* local-as Change */ | |
787 | if (peer->change_local_as) | |
788 | local_as = peer->change_local_as; | |
789 | else | |
790 | local_as = peer->local_as; | |
791 | ||
792 | s = stream_new (BGP_MAX_PACKET_SIZE); | |
793 | ||
794 | /* Make open packet. */ | |
795 | bgp_packet_set_marker (s, BGP_MSG_OPEN); | |
796 | ||
797 | /* Set open packet values. */ | |
798 | stream_putc (s, BGP_VERSION_4); /* BGP version */ | |
0b2aa3a0 PJ |
799 | stream_putw (s, (local_as <= BGP_AS_MAX) ? (u_int16_t) local_as |
800 | : BGP_AS_TRANS); | |
718e3744 | 801 | stream_putw (s, send_holdtime); /* Hold Time */ |
802 | stream_put_in_addr (s, &peer->local_id); /* BGP Identifier */ | |
803 | ||
804 | /* Set capability code. */ | |
805 | bgp_open_capability (s, peer); | |
806 | ||
807 | /* Set BGP packet length. */ | |
808 | length = bgp_packet_set_size (s); | |
809 | ||
810 | if (BGP_DEBUG (normal, NORMAL)) | |
aea339f7 | 811 | zlog_debug ("%s sending OPEN, version %d, my as %u, holdtime %d, id %s", |
718e3744 | 812 | peer->host, BGP_VERSION_4, local_as, |
813 | send_holdtime, inet_ntoa (peer->local_id)); | |
814 | ||
815 | if (BGP_DEBUG (normal, NORMAL)) | |
6b51474d | 816 | zlog_debug ("%s send message type %d, length (incl. header) %d", |
718e3744 | 817 | peer->host, BGP_MSG_OPEN, length); |
818 | ||
819 | /* Dump packet if debug option is set. */ | |
820 | /* bgp_packet_dump (s); */ | |
821 | ||
822 | /* Add packet to the peer. */ | |
823 | bgp_packet_add (peer, s); | |
824 | ||
eb821189 | 825 | BGP_WRITE_ON (peer->t_write, bgp_write, peer->fd); |
718e3744 | 826 | } |
827 | ||
828 | /* Send BGP notify packet with data potion. */ | |
829 | void | |
830 | bgp_notify_send_with_data (struct peer *peer, u_char code, u_char sub_code, | |
831 | u_char *data, size_t datalen) | |
832 | { | |
833 | struct stream *s; | |
834 | int length; | |
835 | ||
836 | /* Allocate new stream. */ | |
837 | s = stream_new (BGP_MAX_PACKET_SIZE); | |
838 | ||
839 | /* Make nitify packet. */ | |
840 | bgp_packet_set_marker (s, BGP_MSG_NOTIFY); | |
841 | ||
842 | /* Set notify packet values. */ | |
843 | stream_putc (s, code); /* BGP notify code */ | |
844 | stream_putc (s, sub_code); /* BGP notify sub_code */ | |
845 | ||
846 | /* If notify data is present. */ | |
847 | if (data) | |
848 | stream_write (s, data, datalen); | |
849 | ||
850 | /* Set BGP packet length. */ | |
851 | length = bgp_packet_set_size (s); | |
852 | ||
853 | /* Add packet to the peer. */ | |
854 | stream_fifo_clean (peer->obuf); | |
855 | bgp_packet_add (peer, s); | |
856 | ||
857 | /* For debug */ | |
858 | { | |
859 | struct bgp_notify bgp_notify; | |
860 | int first = 0; | |
861 | int i; | |
862 | char c[4]; | |
863 | ||
864 | bgp_notify.code = code; | |
865 | bgp_notify.subcode = sub_code; | |
866 | bgp_notify.data = NULL; | |
867 | bgp_notify.length = length - BGP_MSG_NOTIFY_MIN_SIZE; | |
868 | ||
869 | if (bgp_notify.length) | |
870 | { | |
871 | bgp_notify.data = XMALLOC (MTYPE_TMP, bgp_notify.length * 3); | |
872 | for (i = 0; i < bgp_notify.length; i++) | |
873 | if (first) | |
874 | { | |
875 | sprintf (c, " %02x", data[i]); | |
876 | strcat (bgp_notify.data, c); | |
877 | } | |
878 | else | |
879 | { | |
880 | first = 1; | |
881 | sprintf (c, "%02x", data[i]); | |
882 | strcpy (bgp_notify.data, c); | |
883 | } | |
884 | } | |
885 | bgp_notify_print (peer, &bgp_notify, "sending"); | |
886 | if (bgp_notify.data) | |
887 | XFREE (MTYPE_TMP, bgp_notify.data); | |
888 | } | |
889 | ||
890 | if (BGP_DEBUG (normal, NORMAL)) | |
6b51474d | 891 | zlog_debug ("%s send message type %d, length (incl. header) %d", |
718e3744 | 892 | peer->host, BGP_MSG_NOTIFY, length); |
893 | ||
e0701b79 | 894 | /* peer reset cause */ |
895 | if (sub_code != BGP_NOTIFY_CEASE_CONFIG_CHANGE) | |
896 | { | |
897 | if (sub_code == BGP_NOTIFY_CEASE_ADMIN_RESET) | |
1212dc19 | 898 | { |
899 | peer->last_reset = PEER_DOWN_USER_RESET; | |
900 | zlog_info ("Notification sent to neighbor %s: User reset", peer->host); | |
901 | } | |
e0701b79 | 902 | else if (sub_code == BGP_NOTIFY_CEASE_ADMIN_SHUTDOWN) |
1212dc19 | 903 | { |
904 | peer->last_reset = PEER_DOWN_USER_SHUTDOWN; | |
905 | zlog_info ("Notification sent to neighbor %s: shutdown", peer->host); | |
906 | } | |
e0701b79 | 907 | else |
1212dc19 | 908 | { |
909 | peer->last_reset = PEER_DOWN_NOTIFY_SEND; | |
910 | zlog_info ("Notification sent to neighbor %s: type %u/%u", | |
911 | peer->host, code, sub_code); | |
912 | } | |
e0701b79 | 913 | } |
1212dc19 | 914 | else |
915 | zlog_info ("Notification sent to neighbor %s: configuration change", | |
916 | peer->host); | |
e0701b79 | 917 | |
7ccf5e59 | 918 | /* Call immediately. */ |
718e3744 | 919 | BGP_WRITE_OFF (peer->t_write); |
920 | ||
921 | bgp_write_notify (peer); | |
922 | } | |
923 | ||
924 | /* Send BGP notify packet. */ | |
925 | void | |
926 | bgp_notify_send (struct peer *peer, u_char code, u_char sub_code) | |
927 | { | |
928 | bgp_notify_send_with_data (peer, code, sub_code, NULL, 0); | |
929 | } | |
930 | ||
718e3744 | 931 | /* Send route refresh message to the peer. */ |
932 | void | |
933 | bgp_route_refresh_send (struct peer *peer, afi_t afi, safi_t safi, | |
934 | u_char orf_type, u_char when_to_refresh, int remove) | |
935 | { | |
936 | struct stream *s; | |
937 | struct stream *packet; | |
938 | int length; | |
939 | struct bgp_filter *filter; | |
940 | int orf_refresh = 0; | |
941 | ||
750e8146 PJ |
942 | if (DISABLE_BGP_ANNOUNCE) |
943 | return; | |
718e3744 | 944 | |
945 | filter = &peer->filter[afi][safi]; | |
946 | ||
947 | /* Adjust safi code. */ | |
948 | if (safi == SAFI_MPLS_VPN) | |
42e6d745 | 949 | safi = SAFI_MPLS_LABELED_VPN; |
718e3744 | 950 | |
951 | s = stream_new (BGP_MAX_PACKET_SIZE); | |
952 | ||
953 | /* Make BGP update packet. */ | |
954 | if (CHECK_FLAG (peer->cap, PEER_CAP_REFRESH_NEW_RCV)) | |
955 | bgp_packet_set_marker (s, BGP_MSG_ROUTE_REFRESH_NEW); | |
956 | else | |
957 | bgp_packet_set_marker (s, BGP_MSG_ROUTE_REFRESH_OLD); | |
958 | ||
959 | /* Encode Route Refresh message. */ | |
960 | stream_putw (s, afi); | |
961 | stream_putc (s, 0); | |
962 | stream_putc (s, safi); | |
963 | ||
964 | if (orf_type == ORF_TYPE_PREFIX | |
965 | || orf_type == ORF_TYPE_PREFIX_OLD) | |
966 | if (remove || filter->plist[FILTER_IN].plist) | |
967 | { | |
968 | u_int16_t orf_len; | |
969 | unsigned long orfp; | |
970 | ||
971 | orf_refresh = 1; | |
972 | stream_putc (s, when_to_refresh); | |
973 | stream_putc (s, orf_type); | |
9985f83c | 974 | orfp = stream_get_endp (s); |
718e3744 | 975 | stream_putw (s, 0); |
976 | ||
977 | if (remove) | |
978 | { | |
979 | UNSET_FLAG (peer->af_sflags[afi][safi], PEER_STATUS_ORF_PREFIX_SEND); | |
980 | stream_putc (s, ORF_COMMON_PART_REMOVE_ALL); | |
981 | if (BGP_DEBUG (normal, NORMAL)) | |
6b51474d | 982 | zlog_debug ("%s sending REFRESH_REQ to remove ORF(%d) (%s) for afi/safi: %d/%d", |
718e3744 | 983 | peer->host, orf_type, |
984 | (when_to_refresh == REFRESH_DEFER ? "defer" : "immediate"), | |
985 | afi, safi); | |
986 | } | |
987 | else | |
988 | { | |
989 | SET_FLAG (peer->af_sflags[afi][safi], PEER_STATUS_ORF_PREFIX_SEND); | |
990 | prefix_bgp_orf_entry (s, filter->plist[FILTER_IN].plist, | |
991 | ORF_COMMON_PART_ADD, ORF_COMMON_PART_PERMIT, | |
992 | ORF_COMMON_PART_DENY); | |
993 | if (BGP_DEBUG (normal, NORMAL)) | |
6b51474d | 994 | zlog_debug ("%s sending REFRESH_REQ with pfxlist ORF(%d) (%s) for afi/safi: %d/%d", |
718e3744 | 995 | peer->host, orf_type, |
996 | (when_to_refresh == REFRESH_DEFER ? "defer" : "immediate"), | |
997 | afi, safi); | |
998 | } | |
999 | ||
1000 | /* Total ORF Entry Len. */ | |
9985f83c | 1001 | orf_len = stream_get_endp (s) - orfp - 2; |
718e3744 | 1002 | stream_putw_at (s, orfp, orf_len); |
1003 | } | |
1004 | ||
1005 | /* Set packet size. */ | |
1006 | length = bgp_packet_set_size (s); | |
1007 | ||
1008 | if (BGP_DEBUG (normal, NORMAL)) | |
1009 | { | |
1010 | if (! orf_refresh) | |
6b51474d | 1011 | zlog_debug ("%s sending REFRESH_REQ for afi/safi: %d/%d", |
718e3744 | 1012 | peer->host, afi, safi); |
6b51474d | 1013 | zlog_debug ("%s send message type %d, length (incl. header) %d", |
718e3744 | 1014 | peer->host, CHECK_FLAG (peer->cap, PEER_CAP_REFRESH_NEW_RCV) ? |
1015 | BGP_MSG_ROUTE_REFRESH_NEW : BGP_MSG_ROUTE_REFRESH_OLD, length); | |
1016 | } | |
1017 | ||
1018 | /* Make real packet. */ | |
e83e2080 | 1019 | packet = stream_dup (s); |
718e3744 | 1020 | stream_free (s); |
1021 | ||
1022 | /* Add packet to the peer. */ | |
1023 | bgp_packet_add (peer, packet); | |
1024 | ||
eb821189 | 1025 | BGP_WRITE_ON (peer->t_write, bgp_write, peer->fd); |
718e3744 | 1026 | } |
1027 | ||
1028 | /* Send capability message to the peer. */ | |
1029 | void | |
1030 | bgp_capability_send (struct peer *peer, afi_t afi, safi_t safi, | |
1031 | int capability_code, int action) | |
1032 | { | |
1033 | struct stream *s; | |
1034 | struct stream *packet; | |
1035 | int length; | |
1036 | ||
1037 | /* Adjust safi code. */ | |
1038 | if (safi == SAFI_MPLS_VPN) | |
42e6d745 | 1039 | safi = SAFI_MPLS_LABELED_VPN; |
718e3744 | 1040 | |
1041 | s = stream_new (BGP_MAX_PACKET_SIZE); | |
1042 | ||
1043 | /* Make BGP update packet. */ | |
1044 | bgp_packet_set_marker (s, BGP_MSG_CAPABILITY); | |
1045 | ||
1046 | /* Encode MP_EXT capability. */ | |
1047 | if (capability_code == CAPABILITY_CODE_MP) | |
1048 | { | |
1049 | stream_putc (s, action); | |
1050 | stream_putc (s, CAPABILITY_CODE_MP); | |
1051 | stream_putc (s, CAPABILITY_CODE_MP_LEN); | |
1052 | stream_putw (s, afi); | |
1053 | stream_putc (s, 0); | |
1054 | stream_putc (s, safi); | |
1055 | ||
1056 | if (BGP_DEBUG (normal, NORMAL)) | |
6b51474d | 1057 | zlog_debug ("%s sending CAPABILITY has %s MP_EXT CAP for afi/safi: %d/%d", |
718e3744 | 1058 | peer->host, action == CAPABILITY_ACTION_SET ? |
1059 | "Advertising" : "Removing", afi, safi); | |
1060 | } | |
1061 | ||
718e3744 | 1062 | /* Set packet size. */ |
1063 | length = bgp_packet_set_size (s); | |
1064 | ||
1065 | /* Make real packet. */ | |
e83e2080 | 1066 | packet = stream_dup (s); |
718e3744 | 1067 | stream_free (s); |
1068 | ||
1069 | /* Add packet to the peer. */ | |
1070 | bgp_packet_add (peer, packet); | |
1071 | ||
1072 | if (BGP_DEBUG (normal, NORMAL)) | |
6b51474d | 1073 | zlog_debug ("%s send message type %d, length (incl. header) %d", |
718e3744 | 1074 | peer->host, BGP_MSG_CAPABILITY, length); |
1075 | ||
eb821189 | 1076 | BGP_WRITE_ON (peer->t_write, bgp_write, peer->fd); |
718e3744 | 1077 | } |
1078 | \f | |
1079 | /* RFC1771 6.8 Connection collision detection. */ | |
94f2b392 | 1080 | static int |
eb821189 | 1081 | bgp_collision_detect (struct peer *new, struct in_addr remote_id) |
718e3744 | 1082 | { |
eb821189 | 1083 | struct peer *peer; |
1eb8ef25 | 1084 | struct listnode *node, *nnode; |
718e3744 | 1085 | struct bgp *bgp; |
1086 | ||
1087 | bgp = bgp_get_default (); | |
1088 | if (! bgp) | |
1089 | return 0; | |
1090 | ||
1091 | /* Upon receipt of an OPEN message, the local system must examine | |
1092 | all of its connections that are in the OpenConfirm state. A BGP | |
1093 | speaker may also examine connections in an OpenSent state if it | |
1094 | knows the BGP Identifier of the peer by means outside of the | |
1095 | protocol. If among these connections there is a connection to a | |
1096 | remote BGP speaker whose BGP Identifier equals the one in the | |
1097 | OPEN message, then the local system performs the following | |
1098 | collision resolution procedure: */ | |
1099 | ||
1eb8ef25 | 1100 | for (ALL_LIST_ELEMENTS (bgp->peer, node, nnode, peer)) |
718e3744 | 1101 | { |
1102 | /* Under OpenConfirm status, local peer structure already hold | |
1103 | remote router ID. */ | |
eb821189 | 1104 | |
1105 | if (peer != new | |
1106 | && (peer->status == OpenConfirm || peer->status == OpenSent) | |
1107 | && sockunion_same (&peer->su, &new->su)) | |
1108 | { | |
718e3744 | 1109 | /* 1. The BGP Identifier of the local system is compared to |
1110 | the BGP Identifier of the remote system (as specified in | |
1111 | the OPEN message). */ | |
1112 | ||
1113 | if (ntohl (peer->local_id.s_addr) < ntohl (remote_id.s_addr)) | |
1114 | { | |
1115 | /* 2. If the value of the local BGP Identifier is less | |
1116 | than the remote one, the local system closes BGP | |
1117 | connection that already exists (the one that is | |
1118 | already in the OpenConfirm state), and accepts BGP | |
1119 | connection initiated by the remote system. */ | |
1120 | ||
eb821189 | 1121 | if (peer->fd >= 0) |
e0701b79 | 1122 | bgp_notify_send (peer, BGP_NOTIFY_CEASE, BGP_NOTIFY_CEASE_COLLISION_RESOLUTION); |
718e3744 | 1123 | return 1; |
1124 | } | |
1125 | else | |
1126 | { | |
1127 | /* 3. Otherwise, the local system closes newly created | |
1128 | BGP connection (the one associated with the newly | |
1129 | received OPEN message), and continues to use the | |
1130 | existing one (the one that is already in the | |
1131 | OpenConfirm state). */ | |
1132 | ||
eb821189 | 1133 | if (new->fd >= 0) |
f5ba3874 | 1134 | bgp_notify_send (new, BGP_NOTIFY_CEASE, |
1135 | BGP_NOTIFY_CEASE_COLLISION_RESOLUTION); | |
718e3744 | 1136 | return -1; |
1137 | } | |
eb821189 | 1138 | } |
1139 | } | |
718e3744 | 1140 | return 0; |
1141 | } | |
1142 | ||
94f2b392 | 1143 | static int |
718e3744 | 1144 | bgp_open_receive (struct peer *peer, bgp_size_t size) |
1145 | { | |
1146 | int ret; | |
1147 | u_char version; | |
1148 | u_char optlen; | |
1149 | u_int16_t holdtime; | |
1150 | u_int16_t send_holdtime; | |
1151 | as_t remote_as; | |
0b2aa3a0 | 1152 | as_t as4 = 0; |
718e3744 | 1153 | struct peer *realpeer; |
1154 | struct in_addr remote_id; | |
1155 | int capability; | |
5228ad27 | 1156 | u_int8_t notify_data_remote_as[2]; |
1157 | u_int8_t notify_data_remote_id[4]; | |
718e3744 | 1158 | |
1159 | realpeer = NULL; | |
1160 | ||
1161 | /* Parse open packet. */ | |
1162 | version = stream_getc (peer->ibuf); | |
1163 | memcpy (notify_data_remote_as, stream_pnt (peer->ibuf), 2); | |
1164 | remote_as = stream_getw (peer->ibuf); | |
1165 | holdtime = stream_getw (peer->ibuf); | |
1166 | memcpy (notify_data_remote_id, stream_pnt (peer->ibuf), 4); | |
1167 | remote_id.s_addr = stream_get_ipv4 (peer->ibuf); | |
1168 | ||
1169 | /* Receive OPEN message log */ | |
1170 | if (BGP_DEBUG (normal, NORMAL)) | |
aea339f7 | 1171 | zlog_debug ("%s rcv OPEN, version %d, remote-as (in open) %u," |
0b2aa3a0 PJ |
1172 | " holdtime %d, id %s", |
1173 | peer->host, version, remote_as, holdtime, | |
1174 | inet_ntoa (remote_id)); | |
1175 | ||
1176 | /* BEGIN to read the capability here, but dont do it yet */ | |
1177 | capability = 0; | |
1178 | optlen = stream_getc (peer->ibuf); | |
1179 | ||
1180 | if (optlen != 0) | |
1181 | { | |
1182 | /* We need the as4 capability value *right now* because | |
1183 | * if it is there, we have not got the remote_as yet, and without | |
1184 | * that we do not know which peer is connecting to us now. | |
1185 | */ | |
1186 | as4 = peek_for_as4_capability (peer, optlen); | |
1187 | } | |
1188 | ||
1189 | /* Just in case we have a silly peer who sends AS4 capability set to 0 */ | |
1190 | if (CHECK_FLAG (peer->cap, PEER_CAP_AS4_RCV) && !as4) | |
1191 | { | |
1192 | zlog_err ("%s bad OPEN, got AS4 capability, but AS4 set to 0", | |
1193 | peer->host); | |
1194 | bgp_notify_send (peer, BGP_NOTIFY_OPEN_ERR, | |
1195 | BGP_NOTIFY_OPEN_BAD_PEER_AS); | |
1196 | return -1; | |
1197 | } | |
1198 | ||
1199 | if (remote_as == BGP_AS_TRANS) | |
1200 | { | |
1201 | /* Take the AS4 from the capability. We must have received the | |
1202 | * capability now! Otherwise we have a asn16 peer who uses | |
1203 | * BGP_AS_TRANS, for some unknown reason. | |
1204 | */ | |
1205 | if (as4 == BGP_AS_TRANS) | |
1206 | { | |
1207 | zlog_err ("%s [AS4] NEW speaker using AS_TRANS for AS4, not allowed", | |
1208 | peer->host); | |
1209 | bgp_notify_send (peer, BGP_NOTIFY_OPEN_ERR, | |
1210 | BGP_NOTIFY_OPEN_BAD_PEER_AS); | |
1211 | return -1; | |
1212 | } | |
1213 | ||
1214 | if (!as4 && BGP_DEBUG (as4, AS4)) | |
1215 | zlog_debug ("%s [AS4] OPEN remote_as is AS_TRANS, but no AS4." | |
1216 | " Odd, but proceeding.", peer->host); | |
1217 | else if (as4 < BGP_AS_MAX && BGP_DEBUG (as4, AS4)) | |
0df7c91f | 1218 | zlog_debug ("%s [AS4] OPEN remote_as is AS_TRANS, but AS4 (%u) fits " |
0b2aa3a0 PJ |
1219 | "in 2-bytes, very odd peer.", peer->host, as4); |
1220 | if (as4) | |
1221 | remote_as = as4; | |
1222 | } | |
1223 | else | |
1224 | { | |
1225 | /* We may have a partner with AS4 who has an asno < BGP_AS_MAX */ | |
1226 | /* If we have got the capability, peer->as4cap must match remote_as */ | |
1227 | if (CHECK_FLAG (peer->cap, PEER_CAP_AS4_RCV) | |
1228 | && as4 != remote_as) | |
1229 | { | |
1230 | /* raise error, log this, close session */ | |
1231 | zlog_err ("%s bad OPEN, got AS4 capability, but remote_as %u" | |
1232 | " mismatch with 16bit 'myasn' %u in open", | |
1233 | peer->host, as4, remote_as); | |
1234 | bgp_notify_send (peer, BGP_NOTIFY_OPEN_ERR, | |
1235 | BGP_NOTIFY_OPEN_BAD_PEER_AS); | |
1236 | return -1; | |
1237 | } | |
1238 | } | |
1239 | ||
718e3744 | 1240 | /* Lookup peer from Open packet. */ |
1241 | if (CHECK_FLAG (peer->sflags, PEER_STATUS_ACCEPT_PEER)) | |
1242 | { | |
1243 | int as = 0; | |
1244 | ||
1245 | realpeer = peer_lookup_with_open (&peer->su, remote_as, &remote_id, &as); | |
1246 | ||
1247 | if (! realpeer) | |
1248 | { | |
1249 | /* Peer's source IP address is check in bgp_accept(), so this | |
1250 | must be AS number mismatch or remote-id configuration | |
1251 | mismatch. */ | |
1252 | if (as) | |
1253 | { | |
1254 | if (BGP_DEBUG (normal, NORMAL)) | |
6b51474d | 1255 | zlog_debug ("%s bad OPEN, wrong router identifier %s", |
1256 | peer->host, inet_ntoa (remote_id)); | |
1257 | bgp_notify_send_with_data (peer, BGP_NOTIFY_OPEN_ERR, | |
1258 | BGP_NOTIFY_OPEN_BAD_BGP_IDENT, | |
1259 | notify_data_remote_id, 4); | |
718e3744 | 1260 | } |
1261 | else | |
1262 | { | |
1263 | if (BGP_DEBUG (normal, NORMAL)) | |
aea339f7 | 1264 | zlog_debug ("%s bad OPEN, remote AS is %u, expected %u", |
6b51474d | 1265 | peer->host, remote_as, peer->as); |
1266 | bgp_notify_send_with_data (peer, BGP_NOTIFY_OPEN_ERR, | |
1267 | BGP_NOTIFY_OPEN_BAD_PEER_AS, | |
1268 | notify_data_remote_as, 2); | |
718e3744 | 1269 | } |
1270 | return -1; | |
1271 | } | |
1272 | } | |
1273 | ||
1274 | /* When collision is detected and this peer is closed. Retrun | |
1275 | immidiately. */ | |
1276 | ret = bgp_collision_detect (peer, remote_id); | |
1277 | if (ret < 0) | |
1278 | return ret; | |
1279 | ||
eb821189 | 1280 | /* Hack part. */ |
1281 | if (CHECK_FLAG (peer->sflags, PEER_STATUS_ACCEPT_PEER)) | |
1282 | { | |
93406d87 | 1283 | if (realpeer->status == Established |
1284 | && CHECK_FLAG (realpeer->sflags, PEER_STATUS_NSF_MODE)) | |
1285 | { | |
1286 | realpeer->last_reset = PEER_DOWN_NSF_CLOSE_SESSION; | |
1287 | SET_FLAG (realpeer->sflags, PEER_STATUS_NSF_WAIT); | |
1288 | } | |
1289 | else if (ret == 0 && realpeer->status != Active | |
1290 | && realpeer->status != OpenSent | |
6e199263 PJ |
1291 | && realpeer->status != OpenConfirm |
1292 | && realpeer->status != Connect) | |
eb821189 | 1293 | { |
2b2fc560 PJ |
1294 | /* XXX: This is an awful problem.. |
1295 | * | |
1296 | * According to the RFC we should just let this connection (of the | |
1297 | * accepted 'peer') continue on to Established if the other | |
1298 | * connection (the 'realpeer' one) is in state Connect, and deal | |
1299 | * with the more larval FSM as/when it gets far enough to receive | |
1300 | * an Open. We don't do that though, we instead close the (more | |
1301 | * developed) accepted connection. | |
1302 | * | |
1303 | * This means there's a race, which if hit, can loop: | |
1304 | * | |
1305 | * FSM for A FSM for B | |
1306 | * realpeer accept-peer realpeer accept-peer | |
1307 | * | |
1308 | * Connect Connect | |
1309 | * Active | |
1310 | * OpenSent OpenSent | |
1311 | * <arrive here, | |
1312 | * Notify, delete> | |
1313 | * Idle Active | |
1314 | * OpenSent OpenSent | |
1315 | * <arrive here, | |
1316 | * Notify, delete> | |
1317 | * Idle | |
1318 | * <wait> <wait> | |
1319 | * Connect Connect | |
1320 | * | |
1321 | * | |
1322 | * If both sides are Quagga, they're almost certain to wait for | |
1323 | * the same amount of time of course (which doesn't preclude other | |
1324 | * implementations also waiting for same time). The race is | |
1325 | * exacerbated by high-latency (in bgpd and/or the network). | |
1326 | * | |
1327 | * The reason we do this is because our FSM is tied to our peer | |
1328 | * structure, which carries our configuration information, etc. | |
1329 | * I.e. we can't let the accepted-peer FSM continue on as it is, | |
1330 | * cause it's not associated with any actual peer configuration - | |
1331 | * it's just a dummy. | |
1332 | * | |
1333 | * It's possible we could hack-fix this by just bgp_stop'ing the | |
1334 | * realpeer and continueing on with the 'transfer FSM' below. | |
1335 | * Ideally, we need to seperate FSMs from struct peer. | |
1336 | * | |
1337 | * Setting one side to passive avoids the race, as a workaround. | |
1338 | */ | |
eb821189 | 1339 | if (BGP_DEBUG (events, EVENTS)) |
93406d87 | 1340 | zlog_debug ("%s peer status is %s close connection", |
1341 | realpeer->host, LOOKUP (bgp_status_msg, | |
1342 | realpeer->status)); | |
1343 | bgp_notify_send (peer, BGP_NOTIFY_CEASE, | |
1344 | BGP_NOTIFY_CEASE_CONNECT_REJECT); | |
1345 | ||
eb821189 | 1346 | return -1; |
1347 | } | |
1348 | ||
1349 | if (BGP_DEBUG (events, EVENTS)) | |
6e199263 PJ |
1350 | zlog_debug ("%s [Event] Transfer accept BGP peer to real (state %s)", |
1351 | peer->host, | |
1352 | LOOKUP (bgp_status_msg, realpeer->status)); | |
eb821189 | 1353 | |
1354 | bgp_stop (realpeer); | |
1355 | ||
1356 | /* Transfer file descriptor. */ | |
1357 | realpeer->fd = peer->fd; | |
1358 | peer->fd = -1; | |
1359 | ||
1360 | /* Transfer input buffer. */ | |
1361 | stream_free (realpeer->ibuf); | |
1362 | realpeer->ibuf = peer->ibuf; | |
1363 | realpeer->packet_size = peer->packet_size; | |
1364 | peer->ibuf = NULL; | |
1365 | ||
1366 | /* Transfer status. */ | |
1367 | realpeer->status = peer->status; | |
1368 | bgp_stop (peer); | |
200df115 | 1369 | |
eb821189 | 1370 | /* peer pointer change. Open packet send to neighbor. */ |
1371 | peer = realpeer; | |
1372 | bgp_open_send (peer); | |
1373 | if (peer->fd < 0) | |
1374 | { | |
1375 | zlog_err ("bgp_open_receive peer's fd is negative value %d", | |
1376 | peer->fd); | |
1377 | return -1; | |
1378 | } | |
1379 | BGP_READ_ON (peer->t_read, bgp_read, peer->fd); | |
1380 | } | |
1381 | ||
718e3744 | 1382 | /* remote router-id check. */ |
1383 | if (remote_id.s_addr == 0 | |
733cd9e5 | 1384 | || IPV4_CLASS_DE (ntohl (remote_id.s_addr)) |
718e3744 | 1385 | || ntohl (peer->local_id.s_addr) == ntohl (remote_id.s_addr)) |
1386 | { | |
1387 | if (BGP_DEBUG (normal, NORMAL)) | |
6b51474d | 1388 | zlog_debug ("%s bad OPEN, wrong router identifier %s", |
718e3744 | 1389 | peer->host, inet_ntoa (remote_id)); |
1390 | bgp_notify_send_with_data (peer, | |
1391 | BGP_NOTIFY_OPEN_ERR, | |
1392 | BGP_NOTIFY_OPEN_BAD_BGP_IDENT, | |
1393 | notify_data_remote_id, 4); | |
1394 | return -1; | |
1395 | } | |
1396 | ||
1397 | /* Set remote router-id */ | |
1398 | peer->remote_id = remote_id; | |
1399 | ||
1400 | /* Peer BGP version check. */ | |
1401 | if (version != BGP_VERSION_4) | |
1402 | { | |
5228ad27 | 1403 | u_int8_t maxver = BGP_VERSION_4; |
718e3744 | 1404 | if (BGP_DEBUG (normal, NORMAL)) |
6b51474d | 1405 | zlog_debug ("%s bad protocol version, remote requested %d, local request %d", |
718e3744 | 1406 | peer->host, version, BGP_VERSION_4); |
1407 | bgp_notify_send_with_data (peer, | |
1408 | BGP_NOTIFY_OPEN_ERR, | |
1409 | BGP_NOTIFY_OPEN_UNSUP_VERSION, | |
5228ad27 | 1410 | &maxver, 1); |
718e3744 | 1411 | return -1; |
1412 | } | |
1413 | ||
1414 | /* Check neighbor as number. */ | |
1415 | if (remote_as != peer->as) | |
1416 | { | |
1417 | if (BGP_DEBUG (normal, NORMAL)) | |
aea339f7 | 1418 | zlog_debug ("%s bad OPEN, remote AS is %u, expected %u", |
718e3744 | 1419 | peer->host, remote_as, peer->as); |
1420 | bgp_notify_send_with_data (peer, | |
1421 | BGP_NOTIFY_OPEN_ERR, | |
1422 | BGP_NOTIFY_OPEN_BAD_PEER_AS, | |
1423 | notify_data_remote_as, 2); | |
1424 | return -1; | |
1425 | } | |
1426 | ||
1427 | /* From the rfc: Upon receipt of an OPEN message, a BGP speaker MUST | |
1428 | calculate the value of the Hold Timer by using the smaller of its | |
1429 | configured Hold Time and the Hold Time received in the OPEN message. | |
1430 | The Hold Time MUST be either zero or at least three seconds. An | |
1431 | implementation may reject connections on the basis of the Hold Time. */ | |
1432 | ||
1433 | if (holdtime < 3 && holdtime != 0) | |
1434 | { | |
1435 | bgp_notify_send (peer, | |
1436 | BGP_NOTIFY_OPEN_ERR, | |
1437 | BGP_NOTIFY_OPEN_UNACEP_HOLDTIME); | |
1438 | return -1; | |
1439 | } | |
1440 | ||
1441 | /* From the rfc: A reasonable maximum time between KEEPALIVE messages | |
1442 | would be one third of the Hold Time interval. KEEPALIVE messages | |
1443 | MUST NOT be sent more frequently than one per second. An | |
1444 | implementation MAY adjust the rate at which it sends KEEPALIVE | |
1445 | messages as a function of the Hold Time interval. */ | |
1446 | ||
1447 | if (CHECK_FLAG (peer->config, PEER_CONFIG_TIMER)) | |
1448 | send_holdtime = peer->holdtime; | |
1449 | else | |
1450 | send_holdtime = peer->bgp->default_holdtime; | |
1451 | ||
1452 | if (holdtime < send_holdtime) | |
1453 | peer->v_holdtime = holdtime; | |
1454 | else | |
1455 | peer->v_holdtime = send_holdtime; | |
1456 | ||
1457 | peer->v_keepalive = peer->v_holdtime / 3; | |
1458 | ||
1459 | /* Open option part parse. */ | |
718e3744 | 1460 | if (optlen != 0) |
1461 | { | |
5861739f PJ |
1462 | if ((ret = bgp_open_option_parse (peer, optlen, &capability)) < 0) |
1463 | { | |
1464 | bgp_notify_send (peer, | |
1465 | BGP_NOTIFY_OPEN_ERR, | |
1466 | BGP_NOTIFY_OPEN_UNACEP_HOLDTIME); | |
1467 | return ret; | |
1468 | } | |
718e3744 | 1469 | } |
1470 | else | |
1471 | { | |
1472 | if (BGP_DEBUG (normal, NORMAL)) | |
6b51474d | 1473 | zlog_debug ("%s rcvd OPEN w/ OPTION parameter len: 0", |
718e3744 | 1474 | peer->host); |
1475 | } | |
1476 | ||
1477 | /* Override capability. */ | |
1478 | if (! capability || CHECK_FLAG (peer->flags, PEER_FLAG_OVERRIDE_CAPABILITY)) | |
1479 | { | |
1480 | peer->afc_nego[AFI_IP][SAFI_UNICAST] = peer->afc[AFI_IP][SAFI_UNICAST]; | |
1481 | peer->afc_nego[AFI_IP][SAFI_MULTICAST] = peer->afc[AFI_IP][SAFI_MULTICAST]; | |
1482 | peer->afc_nego[AFI_IP6][SAFI_UNICAST] = peer->afc[AFI_IP6][SAFI_UNICAST]; | |
1483 | peer->afc_nego[AFI_IP6][SAFI_MULTICAST] = peer->afc[AFI_IP6][SAFI_MULTICAST]; | |
1484 | } | |
1485 | ||
1486 | /* Get sockname. */ | |
1487 | bgp_getsockname (peer); | |
1488 | ||
1489 | BGP_EVENT_ADD (peer, Receive_OPEN_message); | |
1490 | ||
1491 | peer->packet_size = 0; | |
1492 | if (peer->ibuf) | |
1493 | stream_reset (peer->ibuf); | |
1494 | ||
1495 | return 0; | |
1496 | } | |
1497 | ||
1498 | /* Parse BGP Update packet and make attribute object. */ | |
94f2b392 | 1499 | static int |
718e3744 | 1500 | bgp_update_receive (struct peer *peer, bgp_size_t size) |
1501 | { | |
1502 | int ret; | |
1503 | u_char *end; | |
1504 | struct stream *s; | |
1505 | struct attr attr; | |
1506 | bgp_size_t attribute_len; | |
1507 | bgp_size_t update_len; | |
1508 | bgp_size_t withdraw_len; | |
1509 | struct bgp_nlri update; | |
1510 | struct bgp_nlri withdraw; | |
1511 | struct bgp_nlri mp_update; | |
1512 | struct bgp_nlri mp_withdraw; | |
e01f9cbb | 1513 | char attrstr[BUFSIZ] = ""; |
718e3744 | 1514 | |
1515 | /* Status must be Established. */ | |
1516 | if (peer->status != Established) | |
1517 | { | |
1518 | zlog_err ("%s [FSM] Update packet received under status %s", | |
1519 | peer->host, LOOKUP (bgp_status_msg, peer->status)); | |
1520 | bgp_notify_send (peer, BGP_NOTIFY_FSM_ERR, 0); | |
1521 | return -1; | |
1522 | } | |
1523 | ||
1524 | /* Set initial values. */ | |
1525 | memset (&attr, 0, sizeof (struct attr)); | |
1526 | memset (&update, 0, sizeof (struct bgp_nlri)); | |
1527 | memset (&withdraw, 0, sizeof (struct bgp_nlri)); | |
1528 | memset (&mp_update, 0, sizeof (struct bgp_nlri)); | |
1529 | memset (&mp_withdraw, 0, sizeof (struct bgp_nlri)); | |
1530 | ||
1531 | s = peer->ibuf; | |
1532 | end = stream_pnt (s) + size; | |
1533 | ||
1534 | /* RFC1771 6.3 If the Unfeasible Routes Length or Total Attribute | |
1535 | Length is too large (i.e., if Unfeasible Routes Length + Total | |
1536 | Attribute Length + 23 exceeds the message Length), then the Error | |
1537 | Subcode is set to Malformed Attribute List. */ | |
1538 | if (stream_pnt (s) + 2 > end) | |
1539 | { | |
1540 | zlog_err ("%s [Error] Update packet error" | |
1541 | " (packet length is short for unfeasible length)", | |
1542 | peer->host); | |
1543 | bgp_notify_send (peer, BGP_NOTIFY_UPDATE_ERR, | |
1544 | BGP_NOTIFY_UPDATE_MAL_ATTR); | |
1545 | return -1; | |
1546 | } | |
1547 | ||
1548 | /* Unfeasible Route Length. */ | |
1549 | withdraw_len = stream_getw (s); | |
1550 | ||
1551 | /* Unfeasible Route Length check. */ | |
1552 | if (stream_pnt (s) + withdraw_len > end) | |
1553 | { | |
1554 | zlog_err ("%s [Error] Update packet error" | |
1555 | " (packet unfeasible length overflow %d)", | |
1556 | peer->host, withdraw_len); | |
1557 | bgp_notify_send (peer, BGP_NOTIFY_UPDATE_ERR, | |
1558 | BGP_NOTIFY_UPDATE_MAL_ATTR); | |
1559 | return -1; | |
1560 | } | |
1561 | ||
1562 | /* Unfeasible Route packet format check. */ | |
1563 | if (withdraw_len > 0) | |
1564 | { | |
1565 | ret = bgp_nlri_sanity_check (peer, AFI_IP, stream_pnt (s), withdraw_len); | |
1566 | if (ret < 0) | |
1567 | return -1; | |
1568 | ||
1569 | if (BGP_DEBUG (packet, PACKET_RECV)) | |
6b51474d | 1570 | zlog_debug ("%s [Update:RECV] Unfeasible NLRI received", peer->host); |
718e3744 | 1571 | |
1572 | withdraw.afi = AFI_IP; | |
1573 | withdraw.safi = SAFI_UNICAST; | |
1574 | withdraw.nlri = stream_pnt (s); | |
1575 | withdraw.length = withdraw_len; | |
9985f83c | 1576 | stream_forward_getp (s, withdraw_len); |
718e3744 | 1577 | } |
1578 | ||
1579 | /* Attribute total length check. */ | |
1580 | if (stream_pnt (s) + 2 > end) | |
1581 | { | |
1582 | zlog_warn ("%s [Error] Packet Error" | |
1583 | " (update packet is short for attribute length)", | |
1584 | peer->host); | |
1585 | bgp_notify_send (peer, BGP_NOTIFY_UPDATE_ERR, | |
1586 | BGP_NOTIFY_UPDATE_MAL_ATTR); | |
1587 | return -1; | |
1588 | } | |
1589 | ||
1590 | /* Fetch attribute total length. */ | |
1591 | attribute_len = stream_getw (s); | |
1592 | ||
1593 | /* Attribute length check. */ | |
1594 | if (stream_pnt (s) + attribute_len > end) | |
1595 | { | |
1596 | zlog_warn ("%s [Error] Packet Error" | |
1597 | " (update packet attribute length overflow %d)", | |
1598 | peer->host, attribute_len); | |
1599 | bgp_notify_send (peer, BGP_NOTIFY_UPDATE_ERR, | |
1600 | BGP_NOTIFY_UPDATE_MAL_ATTR); | |
1601 | return -1; | |
1602 | } | |
b881c707 PJ |
1603 | |
1604 | /* Certain attribute parsing errors should not be considered bad enough | |
1605 | * to reset the session for, most particularly any partial/optional | |
1606 | * attributes that have 'tunneled' over speakers that don't understand | |
1607 | * them. Instead we withdraw only the prefix concerned. | |
1608 | * | |
1609 | * Complicates the flow a little though.. | |
1610 | */ | |
1611 | bgp_attr_parse_ret_t attr_parse_ret = BGP_ATTR_PARSE_PROCEED; | |
1612 | /* This define morphs the update case into a withdraw when lower levels | |
1613 | * have signalled an error condition where this is best. | |
1614 | */ | |
1615 | #define NLRI_ATTR_ARG (attr_parse_ret != BGP_ATTR_PARSE_WITHDRAW ? &attr : NULL) | |
718e3744 | 1616 | |
1617 | /* Parse attribute when it exists. */ | |
1618 | if (attribute_len) | |
1619 | { | |
b881c707 | 1620 | attr_parse_ret = bgp_attr_parse (peer, &attr, attribute_len, |
718e3744 | 1621 | &mp_update, &mp_withdraw); |
b881c707 | 1622 | if (attr_parse_ret == BGP_ATTR_PARSE_ERROR) |
718e3744 | 1623 | return -1; |
1624 | } | |
b881c707 | 1625 | |
718e3744 | 1626 | /* Logging the attribute. */ |
b881c707 PJ |
1627 | if (attr_parse_ret == BGP_ATTR_PARSE_WITHDRAW |
1628 | || BGP_DEBUG (update, UPDATE_IN)) | |
718e3744 | 1629 | { |
e01f9cbb | 1630 | ret= bgp_dump_attr (peer, &attr, attrstr, BUFSIZ); |
b881c707 PJ |
1631 | int lvl = (attr_parse_ret == BGP_ATTR_PARSE_WITHDRAW) |
1632 | ? LOG_ERR : LOG_DEBUG; | |
1633 | ||
1634 | if (attr_parse_ret == BGP_ATTR_PARSE_WITHDRAW) | |
1635 | zlog (peer->log, LOG_ERR, | |
1636 | "%s rcvd UPDATE with errors in attr(s)!! Withdrawing route.", | |
1637 | peer->host); | |
e01f9cbb | 1638 | |
1639 | if (ret) | |
b881c707 | 1640 | zlog (peer->log, lvl, "%s rcvd UPDATE w/ attr: %s", |
e01f9cbb | 1641 | peer->host, attrstr); |
718e3744 | 1642 | } |
b881c707 | 1643 | |
718e3744 | 1644 | /* Network Layer Reachability Information. */ |
1645 | update_len = end - stream_pnt (s); | |
1646 | ||
1647 | if (update_len) | |
1648 | { | |
1649 | /* Check NLRI packet format and prefix length. */ | |
1650 | ret = bgp_nlri_sanity_check (peer, AFI_IP, stream_pnt (s), update_len); | |
1651 | if (ret < 0) | |
b881c707 PJ |
1652 | { |
1653 | bgp_attr_unintern_sub (&attr); | |
1654 | if (attr.extra) | |
1655 | bgp_attr_extra_free (&attr); | |
1656 | return -1; | |
1657 | } | |
718e3744 | 1658 | |
1659 | /* Set NLRI portion to structure. */ | |
1660 | update.afi = AFI_IP; | |
1661 | update.safi = SAFI_UNICAST; | |
1662 | update.nlri = stream_pnt (s); | |
1663 | update.length = update_len; | |
9985f83c | 1664 | stream_forward_getp (s, update_len); |
718e3744 | 1665 | } |
1666 | ||
1667 | /* NLRI is processed only when the peer is configured specific | |
1668 | Address Family and Subsequent Address Family. */ | |
1669 | if (peer->afc[AFI_IP][SAFI_UNICAST]) | |
1670 | { | |
1671 | if (withdraw.length) | |
1672 | bgp_nlri_parse (peer, NULL, &withdraw); | |
1673 | ||
1674 | if (update.length) | |
1675 | { | |
1676 | /* We check well-known attribute only for IPv4 unicast | |
1677 | update. */ | |
1678 | ret = bgp_attr_check (peer, &attr); | |
1679 | if (ret < 0) | |
b881c707 PJ |
1680 | { |
1681 | bgp_attr_unintern_sub (&attr); | |
1682 | if (attr.extra) | |
1683 | bgp_attr_extra_free (&attr); | |
1684 | return -1; | |
1685 | } | |
718e3744 | 1686 | |
b881c707 | 1687 | bgp_nlri_parse (peer, NLRI_ATTR_ARG, &update); |
718e3744 | 1688 | } |
e01f9cbb | 1689 | |
f418446b | 1690 | if (mp_update.length |
1691 | && mp_update.afi == AFI_IP | |
1692 | && mp_update.safi == SAFI_UNICAST) | |
b881c707 | 1693 | bgp_nlri_parse (peer, NLRI_ATTR_ARG, &mp_update); |
f418446b | 1694 | |
1695 | if (mp_withdraw.length | |
1696 | && mp_withdraw.afi == AFI_IP | |
1697 | && mp_withdraw.safi == SAFI_UNICAST) | |
1698 | bgp_nlri_parse (peer, NULL, &mp_withdraw); | |
1699 | ||
e01f9cbb | 1700 | if (! attribute_len && ! withdraw_len) |
1701 | { | |
1702 | /* End-of-RIB received */ | |
93406d87 | 1703 | SET_FLAG (peer->af_sflags[AFI_IP][SAFI_UNICAST], |
1704 | PEER_STATUS_EOR_RECEIVED); | |
e01f9cbb | 1705 | |
93406d87 | 1706 | /* NSF delete stale route */ |
1707 | if (peer->nsf[AFI_IP][SAFI_UNICAST]) | |
1708 | bgp_clear_stale_route (peer, AFI_IP, SAFI_UNICAST); | |
1709 | ||
1710 | if (BGP_DEBUG (normal, NORMAL)) | |
6b51474d | 1711 | zlog (peer->log, LOG_DEBUG, "rcvd End-of-RIB for IPv4 Unicast from %s", |
e01f9cbb | 1712 | peer->host); |
1713 | } | |
718e3744 | 1714 | } |
1715 | if (peer->afc[AFI_IP][SAFI_MULTICAST]) | |
1716 | { | |
1717 | if (mp_update.length | |
1718 | && mp_update.afi == AFI_IP | |
1719 | && mp_update.safi == SAFI_MULTICAST) | |
b881c707 | 1720 | bgp_nlri_parse (peer, NLRI_ATTR_ARG, &mp_update); |
718e3744 | 1721 | |
1722 | if (mp_withdraw.length | |
1723 | && mp_withdraw.afi == AFI_IP | |
1724 | && mp_withdraw.safi == SAFI_MULTICAST) | |
1725 | bgp_nlri_parse (peer, NULL, &mp_withdraw); | |
e01f9cbb | 1726 | |
93406d87 | 1727 | if (! withdraw_len |
e01f9cbb | 1728 | && mp_withdraw.afi == AFI_IP |
1729 | && mp_withdraw.safi == SAFI_MULTICAST | |
1730 | && mp_withdraw.length == 0) | |
1731 | { | |
1732 | /* End-of-RIB received */ | |
93406d87 | 1733 | SET_FLAG (peer->af_sflags[AFI_IP][SAFI_MULTICAST], |
1734 | PEER_STATUS_EOR_RECEIVED); | |
e01f9cbb | 1735 | |
93406d87 | 1736 | /* NSF delete stale route */ |
1737 | if (peer->nsf[AFI_IP][SAFI_MULTICAST]) | |
1738 | bgp_clear_stale_route (peer, AFI_IP, SAFI_MULTICAST); | |
1739 | ||
1740 | if (BGP_DEBUG (normal, NORMAL)) | |
6b51474d | 1741 | zlog (peer->log, LOG_DEBUG, "rcvd End-of-RIB for IPv4 Multicast from %s", |
e01f9cbb | 1742 | peer->host); |
1743 | } | |
718e3744 | 1744 | } |
1745 | if (peer->afc[AFI_IP6][SAFI_UNICAST]) | |
1746 | { | |
1747 | if (mp_update.length | |
1748 | && mp_update.afi == AFI_IP6 | |
1749 | && mp_update.safi == SAFI_UNICAST) | |
b881c707 | 1750 | bgp_nlri_parse (peer, NLRI_ATTR_ARG, &mp_update); |
718e3744 | 1751 | |
1752 | if (mp_withdraw.length | |
1753 | && mp_withdraw.afi == AFI_IP6 | |
1754 | && mp_withdraw.safi == SAFI_UNICAST) | |
1755 | bgp_nlri_parse (peer, NULL, &mp_withdraw); | |
e01f9cbb | 1756 | |
93406d87 | 1757 | if (! withdraw_len |
e01f9cbb | 1758 | && mp_withdraw.afi == AFI_IP6 |
1759 | && mp_withdraw.safi == SAFI_UNICAST | |
1760 | && mp_withdraw.length == 0) | |
1761 | { | |
1762 | /* End-of-RIB received */ | |
93406d87 | 1763 | SET_FLAG (peer->af_sflags[AFI_IP6][SAFI_UNICAST], PEER_STATUS_EOR_RECEIVED); |
e01f9cbb | 1764 | |
93406d87 | 1765 | /* NSF delete stale route */ |
1766 | if (peer->nsf[AFI_IP6][SAFI_UNICAST]) | |
1767 | bgp_clear_stale_route (peer, AFI_IP6, SAFI_UNICAST); | |
1768 | ||
1769 | if (BGP_DEBUG (normal, NORMAL)) | |
6b51474d | 1770 | zlog (peer->log, LOG_DEBUG, "rcvd End-of-RIB for IPv6 Unicast from %s", |
e01f9cbb | 1771 | peer->host); |
1772 | } | |
718e3744 | 1773 | } |
1774 | if (peer->afc[AFI_IP6][SAFI_MULTICAST]) | |
1775 | { | |
1776 | if (mp_update.length | |
1777 | && mp_update.afi == AFI_IP6 | |
1778 | && mp_update.safi == SAFI_MULTICAST) | |
b881c707 | 1779 | bgp_nlri_parse (peer, NLRI_ATTR_ARG, &mp_update); |
718e3744 | 1780 | |
1781 | if (mp_withdraw.length | |
1782 | && mp_withdraw.afi == AFI_IP6 | |
1783 | && mp_withdraw.safi == SAFI_MULTICAST) | |
1784 | bgp_nlri_parse (peer, NULL, &mp_withdraw); | |
e01f9cbb | 1785 | |
93406d87 | 1786 | if (! withdraw_len |
e01f9cbb | 1787 | && mp_withdraw.afi == AFI_IP6 |
1788 | && mp_withdraw.safi == SAFI_MULTICAST | |
1789 | && mp_withdraw.length == 0) | |
1790 | { | |
1791 | /* End-of-RIB received */ | |
1792 | ||
93406d87 | 1793 | /* NSF delete stale route */ |
1794 | if (peer->nsf[AFI_IP6][SAFI_MULTICAST]) | |
1795 | bgp_clear_stale_route (peer, AFI_IP6, SAFI_MULTICAST); | |
1796 | ||
e01f9cbb | 1797 | if (BGP_DEBUG (update, UPDATE_IN)) |
6b51474d | 1798 | zlog (peer->log, LOG_DEBUG, "rcvd End-of-RIB for IPv6 Multicast from %s", |
e01f9cbb | 1799 | peer->host); |
1800 | } | |
718e3744 | 1801 | } |
1802 | if (peer->afc[AFI_IP][SAFI_MPLS_VPN]) | |
1803 | { | |
1804 | if (mp_update.length | |
1805 | && mp_update.afi == AFI_IP | |
42e6d745 | 1806 | && mp_update.safi == SAFI_MPLS_LABELED_VPN) |
b881c707 | 1807 | bgp_nlri_parse_vpnv4 (peer, NLRI_ATTR_ARG, &mp_update); |
718e3744 | 1808 | |
1809 | if (mp_withdraw.length | |
1810 | && mp_withdraw.afi == AFI_IP | |
42e6d745 | 1811 | && mp_withdraw.safi == SAFI_MPLS_LABELED_VPN) |
718e3744 | 1812 | bgp_nlri_parse_vpnv4 (peer, NULL, &mp_withdraw); |
e01f9cbb | 1813 | |
93406d87 | 1814 | if (! withdraw_len |
e01f9cbb | 1815 | && mp_withdraw.afi == AFI_IP |
42e6d745 | 1816 | && mp_withdraw.safi == SAFI_MPLS_LABELED_VPN |
e01f9cbb | 1817 | && mp_withdraw.length == 0) |
1818 | { | |
1819 | /* End-of-RIB received */ | |
1820 | ||
1821 | if (BGP_DEBUG (update, UPDATE_IN)) | |
6b51474d | 1822 | zlog (peer->log, LOG_DEBUG, "rcvd End-of-RIB for VPNv4 Unicast from %s", |
e01f9cbb | 1823 | peer->host); |
1824 | } | |
718e3744 | 1825 | } |
1826 | ||
1827 | /* Everything is done. We unintern temporary structures which | |
1828 | interned in bgp_attr_parse(). */ | |
b881c707 | 1829 | bgp_attr_unintern_sub (&attr); |
fb982c25 | 1830 | if (attr.extra) |
b881c707 PJ |
1831 | bgp_attr_extra_free (&attr); |
1832 | ||
718e3744 | 1833 | /* If peering is stopped due to some reason, do not generate BGP |
1834 | event. */ | |
1835 | if (peer->status != Established) | |
1836 | return 0; | |
1837 | ||
1838 | /* Increment packet counter. */ | |
1839 | peer->update_in++; | |
65957886 | 1840 | peer->update_time = bgp_clock (); |
718e3744 | 1841 | |
1842 | /* Generate BGP event. */ | |
1843 | BGP_EVENT_ADD (peer, Receive_UPDATE_message); | |
1844 | ||
1845 | return 0; | |
1846 | } | |
1847 | ||
1848 | /* Notify message treatment function. */ | |
94f2b392 | 1849 | static void |
718e3744 | 1850 | bgp_notify_receive (struct peer *peer, bgp_size_t size) |
1851 | { | |
1852 | struct bgp_notify bgp_notify; | |
1853 | ||
1854 | if (peer->notify.data) | |
1855 | { | |
1856 | XFREE (MTYPE_TMP, peer->notify.data); | |
1857 | peer->notify.data = NULL; | |
1858 | peer->notify.length = 0; | |
1859 | } | |
1860 | ||
1861 | bgp_notify.code = stream_getc (peer->ibuf); | |
1862 | bgp_notify.subcode = stream_getc (peer->ibuf); | |
1863 | bgp_notify.length = size - 2; | |
1864 | bgp_notify.data = NULL; | |
1865 | ||
1866 | /* Preserv notify code and sub code. */ | |
1867 | peer->notify.code = bgp_notify.code; | |
1868 | peer->notify.subcode = bgp_notify.subcode; | |
1869 | /* For further diagnostic record returned Data. */ | |
1870 | if (bgp_notify.length) | |
1871 | { | |
1872 | peer->notify.length = size - 2; | |
1873 | peer->notify.data = XMALLOC (MTYPE_TMP, size - 2); | |
1874 | memcpy (peer->notify.data, stream_pnt (peer->ibuf), size - 2); | |
1875 | } | |
1876 | ||
1877 | /* For debug */ | |
1878 | { | |
1879 | int i; | |
1880 | int first = 0; | |
1881 | char c[4]; | |
1882 | ||
1883 | if (bgp_notify.length) | |
1884 | { | |
1885 | bgp_notify.data = XMALLOC (MTYPE_TMP, bgp_notify.length * 3); | |
1886 | for (i = 0; i < bgp_notify.length; i++) | |
1887 | if (first) | |
1888 | { | |
1889 | sprintf (c, " %02x", stream_getc (peer->ibuf)); | |
1890 | strcat (bgp_notify.data, c); | |
1891 | } | |
1892 | else | |
1893 | { | |
1894 | first = 1; | |
1895 | sprintf (c, "%02x", stream_getc (peer->ibuf)); | |
1896 | strcpy (bgp_notify.data, c); | |
1897 | } | |
1898 | } | |
1899 | ||
1900 | bgp_notify_print(peer, &bgp_notify, "received"); | |
1901 | if (bgp_notify.data) | |
1902 | XFREE (MTYPE_TMP, bgp_notify.data); | |
1903 | } | |
1904 | ||
1905 | /* peer count update */ | |
1906 | peer->notify_in++; | |
1907 | ||
e0701b79 | 1908 | if (peer->status == Established) |
1909 | peer->last_reset = PEER_DOWN_NOTIFY_RECEIVED; | |
1910 | ||
718e3744 | 1911 | /* We have to check for Notify with Unsupported Optional Parameter. |
1912 | in that case we fallback to open without the capability option. | |
1913 | But this done in bgp_stop. We just mark it here to avoid changing | |
1914 | the fsm tables. */ | |
1915 | if (bgp_notify.code == BGP_NOTIFY_OPEN_ERR && | |
1916 | bgp_notify.subcode == BGP_NOTIFY_OPEN_UNSUP_PARAM ) | |
1917 | UNSET_FLAG (peer->sflags, PEER_STATUS_CAPABILITY_OPEN); | |
1918 | ||
718e3744 | 1919 | BGP_EVENT_ADD (peer, Receive_NOTIFICATION_message); |
1920 | } | |
1921 | ||
1922 | /* Keepalive treatment function -- get keepalive send keepalive */ | |
94f2b392 | 1923 | static void |
718e3744 | 1924 | bgp_keepalive_receive (struct peer *peer, bgp_size_t size) |
1925 | { | |
1926 | if (BGP_DEBUG (keepalive, KEEPALIVE)) | |
6b51474d | 1927 | zlog_debug ("%s KEEPALIVE rcvd", peer->host); |
718e3744 | 1928 | |
1929 | BGP_EVENT_ADD (peer, Receive_KEEPALIVE_message); | |
1930 | } | |
1931 | ||
1932 | /* Route refresh message is received. */ | |
94f2b392 | 1933 | static void |
718e3744 | 1934 | bgp_route_refresh_receive (struct peer *peer, bgp_size_t size) |
1935 | { | |
1936 | afi_t afi; | |
1937 | safi_t safi; | |
1938 | u_char reserved; | |
1939 | struct stream *s; | |
1940 | ||
1941 | /* If peer does not have the capability, send notification. */ | |
1942 | if (! CHECK_FLAG (peer->cap, PEER_CAP_REFRESH_ADV)) | |
1943 | { | |
1944 | plog_err (peer->log, "%s [Error] BGP route refresh is not enabled", | |
1945 | peer->host); | |
1946 | bgp_notify_send (peer, | |
1947 | BGP_NOTIFY_HEADER_ERR, | |
1948 | BGP_NOTIFY_HEADER_BAD_MESTYPE); | |
1949 | return; | |
1950 | } | |
1951 | ||
1952 | /* Status must be Established. */ | |
1953 | if (peer->status != Established) | |
1954 | { | |
1955 | plog_err (peer->log, | |
1956 | "%s [Error] Route refresh packet received under status %s", | |
1957 | peer->host, LOOKUP (bgp_status_msg, peer->status)); | |
1958 | bgp_notify_send (peer, BGP_NOTIFY_FSM_ERR, 0); | |
1959 | return; | |
1960 | } | |
1961 | ||
1962 | s = peer->ibuf; | |
1963 | ||
1964 | /* Parse packet. */ | |
1965 | afi = stream_getw (s); | |
1966 | reserved = stream_getc (s); | |
1967 | safi = stream_getc (s); | |
1968 | ||
1969 | if (BGP_DEBUG (normal, NORMAL)) | |
6b51474d | 1970 | zlog_debug ("%s rcvd REFRESH_REQ for afi/safi: %d/%d", |
718e3744 | 1971 | peer->host, afi, safi); |
1972 | ||
1973 | /* Check AFI and SAFI. */ | |
1974 | if ((afi != AFI_IP && afi != AFI_IP6) | |
1975 | || (safi != SAFI_UNICAST && safi != SAFI_MULTICAST | |
42e6d745 | 1976 | && safi != SAFI_MPLS_LABELED_VPN)) |
718e3744 | 1977 | { |
1978 | if (BGP_DEBUG (normal, NORMAL)) | |
1979 | { | |
6b51474d | 1980 | zlog_debug ("%s REFRESH_REQ for unrecognized afi/safi: %d/%d - ignored", |
718e3744 | 1981 | peer->host, afi, safi); |
1982 | } | |
1983 | return; | |
1984 | } | |
1985 | ||
1986 | /* Adjust safi code. */ | |
42e6d745 | 1987 | if (safi == SAFI_MPLS_LABELED_VPN) |
718e3744 | 1988 | safi = SAFI_MPLS_VPN; |
1989 | ||
1990 | if (size != BGP_MSG_ROUTE_REFRESH_MIN_SIZE - BGP_HEADER_SIZE) | |
1991 | { | |
1992 | u_char *end; | |
1993 | u_char when_to_refresh; | |
1994 | u_char orf_type; | |
1995 | u_int16_t orf_len; | |
1996 | ||
1997 | if (size - (BGP_MSG_ROUTE_REFRESH_MIN_SIZE - BGP_HEADER_SIZE) < 5) | |
1998 | { | |
1999 | zlog_info ("%s ORF route refresh length error", peer->host); | |
2000 | bgp_notify_send (peer, BGP_NOTIFY_CEASE, 0); | |
2001 | return; | |
2002 | } | |
2003 | ||
2004 | when_to_refresh = stream_getc (s); | |
2005 | end = stream_pnt (s) + (size - 5); | |
2006 | ||
370b64a2 | 2007 | while ((stream_pnt (s) + 2) < end) |
718e3744 | 2008 | { |
2009 | orf_type = stream_getc (s); | |
2010 | orf_len = stream_getw (s); | |
370b64a2 PJ |
2011 | |
2012 | /* orf_len in bounds? */ | |
2013 | if ((stream_pnt (s) + orf_len) > end) | |
2014 | break; /* XXX: Notify instead?? */ | |
718e3744 | 2015 | if (orf_type == ORF_TYPE_PREFIX |
2016 | || orf_type == ORF_TYPE_PREFIX_OLD) | |
2017 | { | |
2018 | u_char *p_pnt = stream_pnt (s); | |
2019 | u_char *p_end = stream_pnt (s) + orf_len; | |
2020 | struct orf_prefix orfp; | |
2021 | u_char common = 0; | |
2022 | u_int32_t seq; | |
2023 | int psize; | |
2024 | char name[BUFSIZ]; | |
2025 | char buf[BUFSIZ]; | |
2026 | int ret; | |
2027 | ||
2028 | if (BGP_DEBUG (normal, NORMAL)) | |
2029 | { | |
6b51474d | 2030 | zlog_debug ("%s rcvd Prefixlist ORF(%d) length %d", |
718e3744 | 2031 | peer->host, orf_type, orf_len); |
2032 | } | |
2033 | ||
370b64a2 PJ |
2034 | /* we're going to read at least 1 byte of common ORF header, |
2035 | * and 7 bytes of ORF Address-filter entry from the stream | |
2036 | */ | |
2037 | if (orf_len < 7) | |
2038 | break; | |
2039 | ||
718e3744 | 2040 | /* ORF prefix-list name */ |
2041 | sprintf (name, "%s.%d.%d", peer->host, afi, safi); | |
2042 | ||
2043 | while (p_pnt < p_end) | |
2044 | { | |
d64379e8 CH |
2045 | /* If the ORF entry is malformed, want to read as much of it |
2046 | * as possible without going beyond the bounds of the entry, | |
2047 | * to maximise debug information. | |
2048 | */ | |
fdbc8e77 | 2049 | int ok; |
718e3744 | 2050 | memset (&orfp, 0, sizeof (struct orf_prefix)); |
2051 | common = *p_pnt++; | |
d64379e8 | 2052 | /* after ++: p_pnt <= p_end */ |
718e3744 | 2053 | if (common & ORF_COMMON_PART_REMOVE_ALL) |
2054 | { | |
2055 | if (BGP_DEBUG (normal, NORMAL)) | |
6b51474d | 2056 | zlog_debug ("%s rcvd Remove-All pfxlist ORF request", peer->host); |
718e3744 | 2057 | prefix_bgp_orf_remove_all (name); |
2058 | break; | |
2059 | } | |
d64379e8 | 2060 | ok = ((p_end - p_pnt) >= sizeof(u_int32_t)) ; |
bb915f5f | 2061 | if (ok) |
d64379e8 | 2062 | { |
fdbc8e77 PJ |
2063 | memcpy (&seq, p_pnt, sizeof (u_int32_t)); |
2064 | p_pnt += sizeof (u_int32_t); | |
2065 | orfp.seq = ntohl (seq); | |
d64379e8 CH |
2066 | } |
2067 | else | |
2068 | p_pnt = p_end ; | |
2069 | ||
2070 | if ((ok = (p_pnt < p_end))) | |
2071 | orfp.ge = *p_pnt++ ; /* value checked in prefix_bgp_orf_set() */ | |
2072 | if ((ok = (p_pnt < p_end))) | |
2073 | orfp.le = *p_pnt++ ; /* value checked in prefix_bgp_orf_set() */ | |
2074 | if ((ok = (p_pnt < p_end))) | |
2075 | orfp.p.prefixlen = *p_pnt++ ; | |
2076 | orfp.p.family = afi2family (afi); /* afi checked already */ | |
2077 | ||
2078 | psize = PSIZE (orfp.p.prefixlen); /* 0 if not ok */ | |
2079 | if (psize > prefix_blen(&orfp.p)) /* valid for family ? */ | |
2080 | { | |
2081 | ok = 0 ; | |
2082 | psize = prefix_blen(&orfp.p) ; | |
2083 | } | |
2084 | if (psize > (p_end - p_pnt)) /* valid for packet ? */ | |
2085 | { | |
2086 | ok = 0 ; | |
2087 | psize = p_end - p_pnt ; | |
2088 | } | |
2089 | ||
2090 | if (psize > 0) | |
2091 | memcpy (&orfp.p.u.prefix, p_pnt, psize); | |
718e3744 | 2092 | p_pnt += psize; |
2093 | ||
2094 | if (BGP_DEBUG (normal, NORMAL)) | |
d64379e8 | 2095 | zlog_debug ("%s rcvd %s %s seq %u %s/%d ge %d le %d%s", |
718e3744 | 2096 | peer->host, |
2097 | (common & ORF_COMMON_PART_REMOVE ? "Remove" : "Add"), | |
2098 | (common & ORF_COMMON_PART_DENY ? "deny" : "permit"), | |
2099 | orfp.seq, | |
2100 | inet_ntop (orfp.p.family, &orfp.p.u.prefix, buf, BUFSIZ), | |
d64379e8 CH |
2101 | orfp.p.prefixlen, orfp.ge, orfp.le, |
2102 | ok ? "" : " MALFORMED"); | |
fdbc8e77 | 2103 | |
d64379e8 | 2104 | if (ok) |
fdbc8e77 PJ |
2105 | ret = prefix_bgp_orf_set (name, afi, &orfp, |
2106 | (common & ORF_COMMON_PART_DENY ? 0 : 1 ), | |
2107 | (common & ORF_COMMON_PART_REMOVE ? 0 : 1)); | |
718e3744 | 2108 | |
d64379e8 | 2109 | if (!ok || (ret != CMD_SUCCESS)) |
718e3744 | 2110 | { |
2111 | if (BGP_DEBUG (normal, NORMAL)) | |
fdbc8e77 PJ |
2112 | zlog_debug ("%s Received misformatted prefixlist ORF." |
2113 | " Remove All pfxlist", peer->host); | |
718e3744 | 2114 | prefix_bgp_orf_remove_all (name); |
2115 | break; | |
2116 | } | |
2117 | } | |
2118 | peer->orf_plist[afi][safi] = | |
2119 | prefix_list_lookup (AFI_ORF_PREFIX, name); | |
2120 | } | |
9985f83c | 2121 | stream_forward_getp (s, orf_len); |
718e3744 | 2122 | } |
2123 | if (BGP_DEBUG (normal, NORMAL)) | |
6b51474d | 2124 | zlog_debug ("%s rcvd Refresh %s ORF request", peer->host, |
718e3744 | 2125 | when_to_refresh == REFRESH_DEFER ? "Defer" : "Immediate"); |
2126 | if (when_to_refresh == REFRESH_DEFER) | |
2127 | return; | |
2128 | } | |
2129 | ||
2130 | /* First update is deferred until ORF or ROUTE-REFRESH is received */ | |
2131 | if (CHECK_FLAG (peer->af_sflags[afi][safi], PEER_STATUS_ORF_WAIT_REFRESH)) | |
2132 | UNSET_FLAG (peer->af_sflags[afi][safi], PEER_STATUS_ORF_WAIT_REFRESH); | |
2133 | ||
2134 | /* Perform route refreshment to the peer */ | |
2135 | bgp_announce_route (peer, afi, safi); | |
2136 | } | |
2137 | ||
94f2b392 | 2138 | static int |
718e3744 | 2139 | bgp_capability_msg_parse (struct peer *peer, u_char *pnt, bgp_size_t length) |
2140 | { | |
2141 | u_char *end; | |
6d58272b PJ |
2142 | struct capability_mp_data mpc; |
2143 | struct capability_header *hdr; | |
718e3744 | 2144 | u_char action; |
2145 | struct bgp *bgp; | |
2146 | afi_t afi; | |
2147 | safi_t safi; | |
2148 | ||
2149 | bgp = peer->bgp; | |
2150 | end = pnt + length; | |
2151 | ||
2152 | while (pnt < end) | |
6d58272b | 2153 | { |
718e3744 | 2154 | /* We need at least action, capability code and capability length. */ |
2155 | if (pnt + 3 > end) | |
2156 | { | |
2157 | zlog_info ("%s Capability length error", peer->host); | |
2158 | bgp_notify_send (peer, BGP_NOTIFY_CEASE, 0); | |
2159 | return -1; | |
2160 | } | |
718e3744 | 2161 | action = *pnt; |
6d58272b PJ |
2162 | hdr = (struct capability_header *)(pnt + 1); |
2163 | ||
718e3744 | 2164 | /* Action value check. */ |
2165 | if (action != CAPABILITY_ACTION_SET | |
2166 | && action != CAPABILITY_ACTION_UNSET) | |
2167 | { | |
2168 | zlog_info ("%s Capability Action Value error %d", | |
2169 | peer->host, action); | |
2170 | bgp_notify_send (peer, BGP_NOTIFY_CEASE, 0); | |
2171 | return -1; | |
2172 | } | |
2173 | ||
2174 | if (BGP_DEBUG (normal, NORMAL)) | |
6b51474d | 2175 | zlog_debug ("%s CAPABILITY has action: %d, code: %u, length %u", |
6d58272b | 2176 | peer->host, action, hdr->code, hdr->length); |
718e3744 | 2177 | |
2178 | /* Capability length check. */ | |
6d58272b | 2179 | if ((pnt + hdr->length + 3) > end) |
718e3744 | 2180 | { |
2181 | zlog_info ("%s Capability length error", peer->host); | |
2182 | bgp_notify_send (peer, BGP_NOTIFY_CEASE, 0); | |
2183 | return -1; | |
2184 | } | |
2185 | ||
6d58272b PJ |
2186 | /* Fetch structure to the byte stream. */ |
2187 | memcpy (&mpc, pnt + 3, sizeof (struct capability_mp_data)); | |
2188 | ||
718e3744 | 2189 | /* We know MP Capability Code. */ |
6d58272b | 2190 | if (hdr->code == CAPABILITY_CODE_MP) |
718e3744 | 2191 | { |
6d58272b PJ |
2192 | afi = ntohs (mpc.afi); |
2193 | safi = mpc.safi; | |
718e3744 | 2194 | |
2195 | /* Ignore capability when override-capability is set. */ | |
2196 | if (CHECK_FLAG (peer->flags, PEER_FLAG_OVERRIDE_CAPABILITY)) | |
2197 | continue; | |
6d58272b PJ |
2198 | |
2199 | if (!bgp_afi_safi_valid_indices (afi, &safi)) | |
2200 | { | |
2201 | if (BGP_DEBUG (normal, NORMAL)) | |
0b2aa3a0 PJ |
2202 | zlog_debug ("%s Dynamic Capability MP_EXT afi/safi invalid " |
2203 | "(%u/%u)", peer->host, afi, safi); | |
6d58272b PJ |
2204 | continue; |
2205 | } | |
2206 | ||
718e3744 | 2207 | /* Address family check. */ |
6d58272b PJ |
2208 | if (BGP_DEBUG (normal, NORMAL)) |
2209 | zlog_debug ("%s CAPABILITY has %s MP_EXT CAP for afi/safi: %u/%u", | |
2210 | peer->host, | |
2211 | action == CAPABILITY_ACTION_SET | |
2212 | ? "Advertising" : "Removing", | |
2213 | ntohs(mpc.afi) , mpc.safi); | |
2214 | ||
2215 | if (action == CAPABILITY_ACTION_SET) | |
2216 | { | |
2217 | peer->afc_recv[afi][safi] = 1; | |
2218 | if (peer->afc[afi][safi]) | |
2219 | { | |
2220 | peer->afc_nego[afi][safi] = 1; | |
2221 | bgp_announce_route (peer, afi, safi); | |
2222 | } | |
2223 | } | |
2224 | else | |
2225 | { | |
2226 | peer->afc_recv[afi][safi] = 0; | |
2227 | peer->afc_nego[afi][safi] = 0; | |
2228 | ||
2229 | if (peer_active_nego (peer)) | |
228da428 | 2230 | bgp_clear_route (peer, afi, safi, BGP_CLEAR_ROUTE_NORMAL); |
6d58272b PJ |
2231 | else |
2232 | BGP_EVENT_ADD (peer, BGP_Stop); | |
2233 | } | |
718e3744 | 2234 | } |
718e3744 | 2235 | else |
2236 | { | |
2237 | zlog_warn ("%s unrecognized capability code: %d - ignored", | |
6d58272b | 2238 | peer->host, hdr->code); |
718e3744 | 2239 | } |
6d58272b | 2240 | pnt += hdr->length + 3; |
718e3744 | 2241 | } |
2242 | return 0; | |
2243 | } | |
2244 | ||
01b7ce2d PJ |
2245 | /* Dynamic Capability is received. |
2246 | * | |
2247 | * This is exported for unit-test purposes | |
2248 | */ | |
6d58272b | 2249 | int |
718e3744 | 2250 | bgp_capability_receive (struct peer *peer, bgp_size_t size) |
2251 | { | |
2252 | u_char *pnt; | |
718e3744 | 2253 | |
2254 | /* Fetch pointer. */ | |
2255 | pnt = stream_pnt (peer->ibuf); | |
2256 | ||
2257 | if (BGP_DEBUG (normal, NORMAL)) | |
6b51474d | 2258 | zlog_debug ("%s rcv CAPABILITY", peer->host); |
718e3744 | 2259 | |
2260 | /* If peer does not have the capability, send notification. */ | |
2261 | if (! CHECK_FLAG (peer->cap, PEER_CAP_DYNAMIC_ADV)) | |
2262 | { | |
2263 | plog_err (peer->log, "%s [Error] BGP dynamic capability is not enabled", | |
2264 | peer->host); | |
2265 | bgp_notify_send (peer, | |
2266 | BGP_NOTIFY_HEADER_ERR, | |
2267 | BGP_NOTIFY_HEADER_BAD_MESTYPE); | |
0b2aa3a0 | 2268 | return -1; |
718e3744 | 2269 | } |
2270 | ||
2271 | /* Status must be Established. */ | |
2272 | if (peer->status != Established) | |
2273 | { | |
2274 | plog_err (peer->log, | |
2275 | "%s [Error] Dynamic capability packet received under status %s", peer->host, LOOKUP (bgp_status_msg, peer->status)); | |
2276 | bgp_notify_send (peer, BGP_NOTIFY_FSM_ERR, 0); | |
0b2aa3a0 | 2277 | return -1; |
718e3744 | 2278 | } |
2279 | ||
2280 | /* Parse packet. */ | |
6d58272b | 2281 | return bgp_capability_msg_parse (peer, pnt, size); |
718e3744 | 2282 | } |
2283 | \f | |
2284 | /* BGP read utility function. */ | |
94f2b392 | 2285 | static int |
718e3744 | 2286 | bgp_read_packet (struct peer *peer) |
2287 | { | |
2288 | int nbytes; | |
2289 | int readsize; | |
2290 | ||
9985f83c | 2291 | readsize = peer->packet_size - stream_get_endp (peer->ibuf); |
718e3744 | 2292 | |
2293 | /* If size is zero then return. */ | |
2294 | if (! readsize) | |
2295 | return 0; | |
2296 | ||
2297 | /* Read packet from fd. */ | |
35398589 | 2298 | nbytes = stream_read_try (peer->ibuf, peer->fd, readsize); |
718e3744 | 2299 | |
2300 | /* If read byte is smaller than zero then error occured. */ | |
2301 | if (nbytes < 0) | |
2302 | { | |
35398589 SH |
2303 | /* Transient error should retry */ |
2304 | if (nbytes == -2) | |
718e3744 | 2305 | return -1; |
2306 | ||
2307 | plog_err (peer->log, "%s [Error] bgp_read_packet error: %s", | |
6099b3b5 | 2308 | peer->host, safe_strerror (errno)); |
93406d87 | 2309 | |
2310 | if (peer->status == Established) | |
2311 | { | |
2312 | if (CHECK_FLAG (peer->sflags, PEER_STATUS_NSF_MODE)) | |
2313 | { | |
2314 | peer->last_reset = PEER_DOWN_NSF_CLOSE_SESSION; | |
2315 | SET_FLAG (peer->sflags, PEER_STATUS_NSF_WAIT); | |
2316 | } | |
2317 | else | |
2318 | peer->last_reset = PEER_DOWN_CLOSE_SESSION; | |
2319 | } | |
2320 | ||
718e3744 | 2321 | BGP_EVENT_ADD (peer, TCP_fatal_error); |
2322 | return -1; | |
2323 | } | |
2324 | ||
2325 | /* When read byte is zero : clear bgp peer and return */ | |
2326 | if (nbytes == 0) | |
2327 | { | |
2328 | if (BGP_DEBUG (events, EVENTS)) | |
6b51474d | 2329 | plog_debug (peer->log, "%s [Event] BGP connection closed fd %d", |
eb821189 | 2330 | peer->host, peer->fd); |
e0701b79 | 2331 | |
2332 | if (peer->status == Established) | |
93406d87 | 2333 | { |
2334 | if (CHECK_FLAG (peer->sflags, PEER_STATUS_NSF_MODE)) | |
2335 | { | |
2336 | peer->last_reset = PEER_DOWN_NSF_CLOSE_SESSION; | |
2337 | SET_FLAG (peer->sflags, PEER_STATUS_NSF_WAIT); | |
2338 | } | |
2339 | else | |
2340 | peer->last_reset = PEER_DOWN_CLOSE_SESSION; | |
2341 | } | |
e0701b79 | 2342 | |
718e3744 | 2343 | BGP_EVENT_ADD (peer, TCP_connection_closed); |
2344 | return -1; | |
2345 | } | |
2346 | ||
2347 | /* We read partial packet. */ | |
9985f83c | 2348 | if (stream_get_endp (peer->ibuf) != peer->packet_size) |
718e3744 | 2349 | return -1; |
2350 | ||
2351 | return 0; | |
2352 | } | |
2353 | ||
2354 | /* Marker check. */ | |
94f2b392 | 2355 | static int |
718e3744 | 2356 | bgp_marker_all_one (struct stream *s, int length) |
2357 | { | |
2358 | int i; | |
2359 | ||
2360 | for (i = 0; i < length; i++) | |
2361 | if (s->data[i] != 0xff) | |
2362 | return 0; | |
2363 | ||
2364 | return 1; | |
2365 | } | |
2366 | ||
2367 | /* Starting point of packet process function. */ | |
2368 | int | |
2369 | bgp_read (struct thread *thread) | |
2370 | { | |
2371 | int ret; | |
2372 | u_char type = 0; | |
2373 | struct peer *peer; | |
2374 | bgp_size_t size; | |
2375 | char notify_data_length[2]; | |
2376 | ||
2377 | /* Yes first of all get peer pointer. */ | |
2378 | peer = THREAD_ARG (thread); | |
2379 | peer->t_read = NULL; | |
2380 | ||
2381 | /* For non-blocking IO check. */ | |
2382 | if (peer->status == Connect) | |
2383 | { | |
2384 | bgp_connect_check (peer); | |
2385 | goto done; | |
2386 | } | |
2387 | else | |
2388 | { | |
eb821189 | 2389 | if (peer->fd < 0) |
718e3744 | 2390 | { |
eb821189 | 2391 | zlog_err ("bgp_read peer's fd is negative value %d", peer->fd); |
718e3744 | 2392 | return -1; |
2393 | } | |
eb821189 | 2394 | BGP_READ_ON (peer->t_read, bgp_read, peer->fd); |
718e3744 | 2395 | } |
2396 | ||
2397 | /* Read packet header to determine type of the packet */ | |
2398 | if (peer->packet_size == 0) | |
2399 | peer->packet_size = BGP_HEADER_SIZE; | |
2400 | ||
9985f83c | 2401 | if (stream_get_endp (peer->ibuf) < BGP_HEADER_SIZE) |
718e3744 | 2402 | { |
2403 | ret = bgp_read_packet (peer); | |
2404 | ||
2405 | /* Header read error or partial read packet. */ | |
2406 | if (ret < 0) | |
2407 | goto done; | |
2408 | ||
2409 | /* Get size and type. */ | |
9985f83c | 2410 | stream_forward_getp (peer->ibuf, BGP_MARKER_SIZE); |
718e3744 | 2411 | memcpy (notify_data_length, stream_pnt (peer->ibuf), 2); |
2412 | size = stream_getw (peer->ibuf); | |
2413 | type = stream_getc (peer->ibuf); | |
2414 | ||
2415 | if (BGP_DEBUG (normal, NORMAL) && type != 2 && type != 0) | |
6b51474d | 2416 | zlog_debug ("%s rcv message type %d, length (excl. header) %d", |
718e3744 | 2417 | peer->host, type, size - BGP_HEADER_SIZE); |
2418 | ||
2419 | /* Marker check */ | |
f5ba3874 | 2420 | if (((type == BGP_MSG_OPEN) || (type == BGP_MSG_KEEPALIVE)) |
718e3744 | 2421 | && ! bgp_marker_all_one (peer->ibuf, BGP_MARKER_SIZE)) |
2422 | { | |
2423 | bgp_notify_send (peer, | |
2424 | BGP_NOTIFY_HEADER_ERR, | |
2425 | BGP_NOTIFY_HEADER_NOT_SYNC); | |
2426 | goto done; | |
2427 | } | |
2428 | ||
2429 | /* BGP type check. */ | |
2430 | if (type != BGP_MSG_OPEN && type != BGP_MSG_UPDATE | |
2431 | && type != BGP_MSG_NOTIFY && type != BGP_MSG_KEEPALIVE | |
2432 | && type != BGP_MSG_ROUTE_REFRESH_NEW | |
2433 | && type != BGP_MSG_ROUTE_REFRESH_OLD | |
2434 | && type != BGP_MSG_CAPABILITY) | |
2435 | { | |
2436 | if (BGP_DEBUG (normal, NORMAL)) | |
6b51474d | 2437 | plog_debug (peer->log, |
718e3744 | 2438 | "%s unknown message type 0x%02x", |
2439 | peer->host, type); | |
2440 | bgp_notify_send_with_data (peer, | |
2441 | BGP_NOTIFY_HEADER_ERR, | |
2442 | BGP_NOTIFY_HEADER_BAD_MESTYPE, | |
2443 | &type, 1); | |
2444 | goto done; | |
2445 | } | |
2446 | /* Mimimum packet length check. */ | |
2447 | if ((size < BGP_HEADER_SIZE) | |
2448 | || (size > BGP_MAX_PACKET_SIZE) | |
2449 | || (type == BGP_MSG_OPEN && size < BGP_MSG_OPEN_MIN_SIZE) | |
2450 | || (type == BGP_MSG_UPDATE && size < BGP_MSG_UPDATE_MIN_SIZE) | |
2451 | || (type == BGP_MSG_NOTIFY && size < BGP_MSG_NOTIFY_MIN_SIZE) | |
2452 | || (type == BGP_MSG_KEEPALIVE && size != BGP_MSG_KEEPALIVE_MIN_SIZE) | |
2453 | || (type == BGP_MSG_ROUTE_REFRESH_NEW && size < BGP_MSG_ROUTE_REFRESH_MIN_SIZE) | |
2454 | || (type == BGP_MSG_ROUTE_REFRESH_OLD && size < BGP_MSG_ROUTE_REFRESH_MIN_SIZE) | |
2455 | || (type == BGP_MSG_CAPABILITY && size < BGP_MSG_CAPABILITY_MIN_SIZE)) | |
2456 | { | |
2457 | if (BGP_DEBUG (normal, NORMAL)) | |
6b51474d | 2458 | plog_debug (peer->log, |
718e3744 | 2459 | "%s bad message length - %d for %s", |
2460 | peer->host, size, | |
2461 | type == 128 ? "ROUTE-REFRESH" : | |
2462 | bgp_type_str[(int) type]); | |
2463 | bgp_notify_send_with_data (peer, | |
2464 | BGP_NOTIFY_HEADER_ERR, | |
2465 | BGP_NOTIFY_HEADER_BAD_MESLEN, | |
c9e52be3 | 2466 | (u_char *) notify_data_length, 2); |
718e3744 | 2467 | goto done; |
2468 | } | |
2469 | ||
2470 | /* Adjust size to message length. */ | |
2471 | peer->packet_size = size; | |
2472 | } | |
2473 | ||
2474 | ret = bgp_read_packet (peer); | |
2475 | if (ret < 0) | |
2476 | goto done; | |
2477 | ||
2478 | /* Get size and type again. */ | |
2479 | size = stream_getw_from (peer->ibuf, BGP_MARKER_SIZE); | |
2480 | type = stream_getc_from (peer->ibuf, BGP_MARKER_SIZE + 2); | |
2481 | ||
2482 | /* BGP packet dump function. */ | |
2483 | bgp_dump_packet (peer, type, peer->ibuf); | |
2484 | ||
2485 | size = (peer->packet_size - BGP_HEADER_SIZE); | |
2486 | ||
2487 | /* Read rest of the packet and call each sort of packet routine */ | |
2488 | switch (type) | |
2489 | { | |
2490 | case BGP_MSG_OPEN: | |
2491 | peer->open_in++; | |
f5ba3874 | 2492 | bgp_open_receive (peer, size); /* XXX return value ignored! */ |
718e3744 | 2493 | break; |
2494 | case BGP_MSG_UPDATE: | |
2495 | peer->readtime = time(NULL); /* Last read timer reset */ | |
2496 | bgp_update_receive (peer, size); | |
2497 | break; | |
2498 | case BGP_MSG_NOTIFY: | |
2499 | bgp_notify_receive (peer, size); | |
2500 | break; | |
2501 | case BGP_MSG_KEEPALIVE: | |
2502 | peer->readtime = time(NULL); /* Last read timer reset */ | |
2503 | bgp_keepalive_receive (peer, size); | |
2504 | break; | |
2505 | case BGP_MSG_ROUTE_REFRESH_NEW: | |
2506 | case BGP_MSG_ROUTE_REFRESH_OLD: | |
2507 | peer->refresh_in++; | |
2508 | bgp_route_refresh_receive (peer, size); | |
2509 | break; | |
2510 | case BGP_MSG_CAPABILITY: | |
2511 | peer->dynamic_cap_in++; | |
2512 | bgp_capability_receive (peer, size); | |
2513 | break; | |
2514 | } | |
2515 | ||
2516 | /* Clear input buffer. */ | |
2517 | peer->packet_size = 0; | |
2518 | if (peer->ibuf) | |
2519 | stream_reset (peer->ibuf); | |
2520 | ||
2521 | done: | |
2522 | if (CHECK_FLAG (peer->sflags, PEER_STATUS_ACCEPT_PEER)) | |
2523 | { | |
2524 | if (BGP_DEBUG (events, EVENTS)) | |
6b51474d | 2525 | zlog_debug ("%s [Event] Accepting BGP peer delete", peer->host); |
718e3744 | 2526 | peer_delete (peer); |
2527 | } | |
2528 | return 0; | |
2529 | } |