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1 | /* BGP nexthop scan | |
2 | Copyright (C) 2000 Kunihiro Ishiguro | |
3 | ||
4 | This file is part of GNU Zebra. | |
5 | ||
6 | GNU Zebra is free software; you can redistribute it and/or modify it | |
7 | under the terms of the GNU General Public License as published by the | |
8 | Free Software Foundation; either version 2, or (at your option) any | |
9 | later version. | |
10 | ||
11 | GNU Zebra is distributed in the hope that it will be useful, but | |
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
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 "command.h" | |
24 | #include "thread.h" | |
25 | #include "prefix.h" | |
26 | #include "zclient.h" | |
27 | #include "stream.h" | |
28 | #include "network.h" | |
29 | #include "log.h" | |
30 | #include "memory.h" | |
31 | ||
32 | #include "bgpd/bgpd.h" | |
33 | #include "bgpd/bgp_table.h" | |
34 | #include "bgpd/bgp_route.h" | |
35 | #include "bgpd/bgp_attr.h" | |
36 | #include "bgpd/bgp_nexthop.h" | |
37 | #include "bgpd/bgp_debug.h" | |
38 | #include "bgpd/bgp_damp.h" | |
39 | #include "zebra/rib.h" | |
40 | #include "zebra/zserv.h" /* For ZEBRA_SERV_PATH. */ | |
41 | ||
42 | struct bgp_nexthop_cache *zlookup_query (struct in_addr); | |
43 | #ifdef HAVE_IPV6 | |
44 | struct bgp_nexthop_cache *zlookup_query_ipv6 (struct in6_addr *); | |
45 | #endif /* HAVE_IPV6 */ | |
46 | \f | |
47 | /* Only one BGP scan thread are activated at the same time. */ | |
48 | static struct thread *bgp_scan_thread = NULL; | |
49 | ||
50 | /* BGP import thread */ | |
51 | static struct thread *bgp_import_thread = NULL; | |
52 | ||
53 | /* BGP scan interval. */ | |
54 | static int bgp_scan_interval; | |
55 | ||
56 | /* BGP import interval. */ | |
57 | static int bgp_import_interval; | |
58 | ||
59 | /* Route table for next-hop lookup cache. */ | |
60 | static struct bgp_table *bgp_nexthop_cache_table[AFI_MAX]; | |
61 | static struct bgp_table *cache1_table[AFI_MAX]; | |
62 | static struct bgp_table *cache2_table[AFI_MAX]; | |
63 | ||
64 | /* Route table for connected route. */ | |
65 | static struct bgp_table *bgp_connected_table[AFI_MAX]; | |
66 | ||
67 | /* BGP nexthop lookup query client. */ | |
68 | struct zclient *zlookup = NULL; | |
69 | \f | |
70 | /* Add nexthop to the end of the list. */ | |
71 | static void | |
72 | bnc_nexthop_add (struct bgp_nexthop_cache *bnc, struct nexthop *nexthop) | |
73 | { | |
74 | struct nexthop *last; | |
75 | ||
76 | for (last = bnc->nexthop; last && last->next; last = last->next) | |
77 | ; | |
78 | if (last) | |
79 | last->next = nexthop; | |
80 | else | |
81 | bnc->nexthop = nexthop; | |
82 | nexthop->prev = last; | |
83 | } | |
84 | ||
85 | static void | |
86 | bnc_nexthop_free (struct bgp_nexthop_cache *bnc) | |
87 | { | |
88 | struct nexthop *nexthop; | |
89 | struct nexthop *next = NULL; | |
90 | ||
91 | for (nexthop = bnc->nexthop; nexthop; nexthop = next) | |
92 | { | |
93 | next = nexthop->next; | |
94 | XFREE (MTYPE_NEXTHOP, nexthop); | |
95 | } | |
96 | } | |
97 | ||
98 | static struct bgp_nexthop_cache * | |
99 | bnc_new (void) | |
100 | { | |
101 | return XCALLOC (MTYPE_BGP_NEXTHOP_CACHE, sizeof (struct bgp_nexthop_cache)); | |
102 | } | |
103 | ||
104 | static void | |
105 | bnc_free (struct bgp_nexthop_cache *bnc) | |
106 | { | |
107 | bnc_nexthop_free (bnc); | |
108 | XFREE (MTYPE_BGP_NEXTHOP_CACHE, bnc); | |
109 | } | |
110 | \f | |
111 | static int | |
112 | bgp_nexthop_same (struct nexthop *next1, struct nexthop *next2) | |
113 | { | |
114 | if (next1->type != next2->type) | |
115 | return 0; | |
116 | ||
117 | switch (next1->type) | |
118 | { | |
119 | case ZEBRA_NEXTHOP_IPV4: | |
120 | if (! IPV4_ADDR_SAME (&next1->gate.ipv4, &next2->gate.ipv4)) | |
121 | return 0; | |
122 | break; | |
123 | case ZEBRA_NEXTHOP_IFINDEX: | |
124 | case ZEBRA_NEXTHOP_IFNAME: | |
125 | if (next1->ifindex != next2->ifindex) | |
126 | return 0; | |
127 | break; | |
128 | #ifdef HAVE_IPV6 | |
129 | case ZEBRA_NEXTHOP_IPV6: | |
130 | if (! IPV6_ADDR_SAME (&next1->gate.ipv6, &next2->gate.ipv6)) | |
131 | return 0; | |
132 | break; | |
133 | case ZEBRA_NEXTHOP_IPV6_IFINDEX: | |
134 | case ZEBRA_NEXTHOP_IPV6_IFNAME: | |
135 | if (! IPV6_ADDR_SAME (&next1->gate.ipv6, &next2->gate.ipv6)) | |
136 | return 0; | |
137 | if (next1->ifindex != next2->ifindex) | |
138 | return 0; | |
139 | break; | |
140 | #endif /* HAVE_IPV6 */ | |
141 | default: | |
142 | /* do nothing */ | |
143 | break; | |
144 | } | |
145 | return 1; | |
146 | } | |
147 | ||
148 | static int | |
149 | bgp_nexthop_cache_different (struct bgp_nexthop_cache *bnc1, | |
150 | struct bgp_nexthop_cache *bnc2) | |
151 | { | |
152 | int i; | |
153 | struct nexthop *next1, *next2; | |
154 | ||
155 | if (bnc1->nexthop_num != bnc2->nexthop_num) | |
156 | return 1; | |
157 | ||
158 | next1 = bnc1->nexthop; | |
159 | next2 = bnc2->nexthop; | |
160 | ||
161 | for (i = 0; i < bnc1->nexthop_num; i++) | |
162 | { | |
163 | if (! bgp_nexthop_same (next1, next2)) | |
164 | return 1; | |
165 | ||
166 | next1 = next1->next; | |
167 | next2 = next2->next; | |
168 | } | |
169 | return 0; | |
170 | } | |
171 | ||
172 | /* If nexthop exists on connected network return 1. */ | |
173 | int | |
174 | bgp_nexthop_onlink (afi_t afi, struct attr *attr) | |
175 | { | |
176 | struct bgp_node *rn; | |
177 | ||
178 | /* If zebra is not enabled return */ | |
179 | if (zlookup->sock < 0) | |
180 | return 1; | |
181 | ||
182 | /* Lookup the address is onlink or not. */ | |
183 | if (afi == AFI_IP) | |
184 | { | |
185 | rn = bgp_node_match_ipv4 (bgp_connected_table[AFI_IP], &attr->nexthop); | |
186 | if (rn) | |
187 | { | |
188 | bgp_unlock_node (rn); | |
189 | return 1; | |
190 | } | |
191 | } | |
192 | #ifdef HAVE_IPV6 | |
193 | else if (afi == AFI_IP6) | |
194 | { | |
195 | if (attr->extra->mp_nexthop_len == 32) | |
196 | return 1; | |
197 | else if (attr->extra->mp_nexthop_len == 16) | |
198 | { | |
199 | if (IN6_IS_ADDR_LINKLOCAL (&attr->extra->mp_nexthop_global)) | |
200 | return 1; | |
201 | ||
202 | rn = bgp_node_match_ipv6 (bgp_connected_table[AFI_IP6], | |
203 | &attr->extra->mp_nexthop_global); | |
204 | if (rn) | |
205 | { | |
206 | bgp_unlock_node (rn); | |
207 | return 1; | |
208 | } | |
209 | } | |
210 | } | |
211 | #endif /* HAVE_IPV6 */ | |
212 | return 0; | |
213 | } | |
214 | ||
215 | #ifdef HAVE_IPV6 | |
216 | /* Check specified next-hop is reachable or not. */ | |
217 | static int | |
218 | bgp_nexthop_lookup_ipv6 (struct peer *peer, struct bgp_info *ri, int *changed, | |
219 | int *metricchanged) | |
220 | { | |
221 | struct bgp_node *rn; | |
222 | struct prefix p; | |
223 | struct bgp_nexthop_cache *bnc; | |
224 | struct attr *attr; | |
225 | ||
226 | /* If lookup is not enabled, return valid. */ | |
227 | if (zlookup->sock < 0) | |
228 | { | |
229 | if (ri->extra) | |
230 | ri->extra->igpmetric = 0; | |
231 | return 1; | |
232 | } | |
233 | ||
234 | /* Only check IPv6 global address only nexthop. */ | |
235 | attr = ri->attr; | |
236 | ||
237 | if (attr->extra->mp_nexthop_len != 16 | |
238 | || IN6_IS_ADDR_LINKLOCAL (&attr->extra->mp_nexthop_global)) | |
239 | return 1; | |
240 | ||
241 | memset (&p, 0, sizeof (struct prefix)); | |
242 | p.family = AF_INET6; | |
243 | p.prefixlen = IPV6_MAX_BITLEN; | |
244 | p.u.prefix6 = attr->extra->mp_nexthop_global; | |
245 | ||
246 | /* IBGP or ebgp-multihop */ | |
247 | rn = bgp_node_get (bgp_nexthop_cache_table[AFI_IP6], &p); | |
248 | ||
249 | if (rn->info) | |
250 | { | |
251 | bnc = rn->info; | |
252 | bgp_unlock_node (rn); | |
253 | } | |
254 | else | |
255 | { | |
256 | if (NULL == (bnc = zlookup_query_ipv6 (&attr->extra->mp_nexthop_global))) | |
257 | bnc = bnc_new (); | |
258 | else | |
259 | { | |
260 | if (changed) | |
261 | { | |
262 | struct bgp_table *old; | |
263 | struct bgp_node *oldrn; | |
264 | ||
265 | if (bgp_nexthop_cache_table[AFI_IP6] == cache1_table[AFI_IP6]) | |
266 | old = cache2_table[AFI_IP6]; | |
267 | else | |
268 | old = cache1_table[AFI_IP6]; | |
269 | ||
270 | oldrn = bgp_node_lookup (old, &p); | |
271 | if (oldrn) | |
272 | { | |
273 | struct bgp_nexthop_cache *oldbnc = oldrn->info; | |
274 | ||
275 | bnc->changed = bgp_nexthop_cache_different (bnc, oldbnc); | |
276 | ||
277 | if (bnc->metric != oldbnc->metric) | |
278 | bnc->metricchanged = 1; | |
279 | ||
280 | bgp_unlock_node (oldrn); | |
281 | } | |
282 | } | |
283 | } | |
284 | rn->info = bnc; | |
285 | } | |
286 | ||
287 | if (changed) | |
288 | *changed = bnc->changed; | |
289 | ||
290 | if (metricchanged) | |
291 | *metricchanged = bnc->metricchanged; | |
292 | ||
293 | if (bnc->valid && bnc->metric) | |
294 | (bgp_info_extra_get (ri))->igpmetric = bnc->metric; | |
295 | else if (ri->extra) | |
296 | ri->extra->igpmetric = 0; | |
297 | ||
298 | return bnc->valid; | |
299 | } | |
300 | #endif /* HAVE_IPV6 */ | |
301 | ||
302 | /* Check specified next-hop is reachable or not. */ | |
303 | int | |
304 | bgp_nexthop_lookup (afi_t afi, struct peer *peer, struct bgp_info *ri, | |
305 | int *changed, int *metricchanged) | |
306 | { | |
307 | struct bgp_node *rn; | |
308 | struct prefix p; | |
309 | struct bgp_nexthop_cache *bnc; | |
310 | struct in_addr addr; | |
311 | ||
312 | /* If lookup is not enabled, return valid. */ | |
313 | if (zlookup->sock < 0) | |
314 | { | |
315 | if (ri->extra) | |
316 | ri->extra->igpmetric = 0; | |
317 | return 1; | |
318 | } | |
319 | ||
320 | #ifdef HAVE_IPV6 | |
321 | if (afi == AFI_IP6) | |
322 | return bgp_nexthop_lookup_ipv6 (peer, ri, changed, metricchanged); | |
323 | #endif /* HAVE_IPV6 */ | |
324 | ||
325 | addr = ri->attr->nexthop; | |
326 | ||
327 | memset (&p, 0, sizeof (struct prefix)); | |
328 | p.family = AF_INET; | |
329 | p.prefixlen = IPV4_MAX_BITLEN; | |
330 | p.u.prefix4 = addr; | |
331 | ||
332 | /* IBGP or ebgp-multihop */ | |
333 | rn = bgp_node_get (bgp_nexthop_cache_table[AFI_IP], &p); | |
334 | ||
335 | if (rn->info) | |
336 | { | |
337 | bnc = rn->info; | |
338 | bgp_unlock_node (rn); | |
339 | } | |
340 | else | |
341 | { | |
342 | if (NULL == (bnc = zlookup_query (addr))) | |
343 | bnc = bnc_new (); | |
344 | else | |
345 | { | |
346 | if (changed) | |
347 | { | |
348 | struct bgp_table *old; | |
349 | struct bgp_node *oldrn; | |
350 | ||
351 | if (bgp_nexthop_cache_table[AFI_IP] == cache1_table[AFI_IP]) | |
352 | old = cache2_table[AFI_IP]; | |
353 | else | |
354 | old = cache1_table[AFI_IP]; | |
355 | ||
356 | oldrn = bgp_node_lookup (old, &p); | |
357 | if (oldrn) | |
358 | { | |
359 | struct bgp_nexthop_cache *oldbnc = oldrn->info; | |
360 | ||
361 | bnc->changed = bgp_nexthop_cache_different (bnc, oldbnc); | |
362 | ||
363 | if (bnc->metric != oldbnc->metric) | |
364 | bnc->metricchanged = 1; | |
365 | ||
366 | bgp_unlock_node (oldrn); | |
367 | } | |
368 | } | |
369 | } | |
370 | rn->info = bnc; | |
371 | } | |
372 | ||
373 | if (changed) | |
374 | *changed = bnc->changed; | |
375 | ||
376 | if (metricchanged) | |
377 | *metricchanged = bnc->metricchanged; | |
378 | ||
379 | if (bnc->valid && bnc->metric) | |
380 | (bgp_info_extra_get(ri))->igpmetric = bnc->metric; | |
381 | else if (ri->extra) | |
382 | ri->extra->igpmetric = 0; | |
383 | ||
384 | return bnc->valid; | |
385 | } | |
386 | ||
387 | /* Reset and free all BGP nexthop cache. */ | |
388 | static void | |
389 | bgp_nexthop_cache_reset (struct bgp_table *table) | |
390 | { | |
391 | struct bgp_node *rn; | |
392 | struct bgp_nexthop_cache *bnc; | |
393 | ||
394 | for (rn = bgp_table_top (table); rn; rn = bgp_route_next (rn)) | |
395 | if ((bnc = rn->info) != NULL) | |
396 | { | |
397 | bnc_free (bnc); | |
398 | rn->info = NULL; | |
399 | bgp_unlock_node (rn); | |
400 | } | |
401 | } | |
402 | ||
403 | static void | |
404 | bgp_scan (afi_t afi, safi_t safi) | |
405 | { | |
406 | struct bgp_node *rn; | |
407 | struct bgp *bgp; | |
408 | struct bgp_info *bi; | |
409 | struct bgp_info *next; | |
410 | struct peer *peer; | |
411 | struct listnode *node, *nnode; | |
412 | int valid; | |
413 | int current; | |
414 | int changed; | |
415 | int metricchanged; | |
416 | ||
417 | /* Change cache. */ | |
418 | if (bgp_nexthop_cache_table[afi] == cache1_table[afi]) | |
419 | bgp_nexthop_cache_table[afi] = cache2_table[afi]; | |
420 | else | |
421 | bgp_nexthop_cache_table[afi] = cache1_table[afi]; | |
422 | ||
423 | /* Get default bgp. */ | |
424 | bgp = bgp_get_default (); | |
425 | if (bgp == NULL) | |
426 | return; | |
427 | ||
428 | /* Maximum prefix check */ | |
429 | for (ALL_LIST_ELEMENTS (bgp->peer, node, nnode, peer)) | |
430 | { | |
431 | if (peer->status != Established) | |
432 | continue; | |
433 | ||
434 | if (peer->afc[afi][SAFI_UNICAST]) | |
435 | bgp_maximum_prefix_overflow (peer, afi, SAFI_UNICAST, 1); | |
436 | if (peer->afc[afi][SAFI_MULTICAST]) | |
437 | bgp_maximum_prefix_overflow (peer, afi, SAFI_MULTICAST, 1); | |
438 | if (peer->afc[afi][SAFI_MPLS_VPN]) | |
439 | bgp_maximum_prefix_overflow (peer, afi, SAFI_MPLS_VPN, 1); | |
440 | } | |
441 | ||
442 | for (rn = bgp_table_top (bgp->rib[afi][SAFI_UNICAST]); rn; | |
443 | rn = bgp_route_next (rn)) | |
444 | { | |
445 | for (bi = rn->info; bi; bi = next) | |
446 | { | |
447 | next = bi->next; | |
448 | ||
449 | if (bi->type == ZEBRA_ROUTE_BGP && bi->sub_type == BGP_ROUTE_NORMAL) | |
450 | { | |
451 | changed = 0; | |
452 | metricchanged = 0; | |
453 | ||
454 | if (peer_sort (bi->peer) == BGP_PEER_EBGP && bi->peer->ttl == 1) | |
455 | valid = bgp_nexthop_onlink (afi, bi->attr); | |
456 | else | |
457 | valid = bgp_nexthop_lookup (afi, bi->peer, bi, | |
458 | &changed, &metricchanged); | |
459 | ||
460 | current = CHECK_FLAG (bi->flags, BGP_INFO_VALID) ? 1 : 0; | |
461 | ||
462 | if (changed) | |
463 | SET_FLAG (bi->flags, BGP_INFO_IGP_CHANGED); | |
464 | else | |
465 | UNSET_FLAG (bi->flags, BGP_INFO_IGP_CHANGED); | |
466 | ||
467 | if (valid != current) | |
468 | { | |
469 | if (CHECK_FLAG (bi->flags, BGP_INFO_VALID)) | |
470 | { | |
471 | bgp_aggregate_decrement (bgp, &rn->p, bi, | |
472 | afi, SAFI_UNICAST); | |
473 | bgp_info_unset_flag (rn, bi, BGP_INFO_VALID); | |
474 | } | |
475 | else | |
476 | { | |
477 | bgp_info_set_flag (rn, bi, BGP_INFO_VALID); | |
478 | bgp_aggregate_increment (bgp, &rn->p, bi, | |
479 | afi, SAFI_UNICAST); | |
480 | } | |
481 | } | |
482 | ||
483 | if (CHECK_FLAG (bgp->af_flags[afi][SAFI_UNICAST], | |
484 | BGP_CONFIG_DAMPENING) | |
485 | && bi->extra && bi->extra->damp_info ) | |
486 | if (bgp_damp_scan (bi, afi, SAFI_UNICAST)) | |
487 | bgp_aggregate_increment (bgp, &rn->p, bi, | |
488 | afi, SAFI_UNICAST); | |
489 | } | |
490 | } | |
491 | bgp_process (bgp, rn, afi, SAFI_UNICAST); | |
492 | } | |
493 | ||
494 | /* Flash old cache. */ | |
495 | if (bgp_nexthop_cache_table[afi] == cache1_table[afi]) | |
496 | bgp_nexthop_cache_reset (cache2_table[afi]); | |
497 | else | |
498 | bgp_nexthop_cache_reset (cache1_table[afi]); | |
499 | ||
500 | if (BGP_DEBUG (events, EVENTS)) | |
501 | { | |
502 | if (afi == AFI_IP) | |
503 | zlog_debug ("scanning IPv4 Unicast routing tables"); | |
504 | else if (afi == AFI_IP6) | |
505 | zlog_debug ("scanning IPv6 Unicast routing tables"); | |
506 | } | |
507 | } | |
508 | ||
509 | /* BGP scan thread. This thread check nexthop reachability. */ | |
510 | static int | |
511 | bgp_scan_timer (struct thread *t) | |
512 | { | |
513 | bgp_scan_thread = | |
514 | thread_add_timer (master, bgp_scan_timer, NULL, bgp_scan_interval); | |
515 | ||
516 | if (BGP_DEBUG (events, EVENTS)) | |
517 | zlog_debug ("Performing BGP general scanning"); | |
518 | ||
519 | bgp_scan (AFI_IP, SAFI_UNICAST); | |
520 | ||
521 | #ifdef HAVE_IPV6 | |
522 | bgp_scan (AFI_IP6, SAFI_UNICAST); | |
523 | #endif /* HAVE_IPV6 */ | |
524 | ||
525 | return 0; | |
526 | } | |
527 | \f | |
528 | struct bgp_connected_ref | |
529 | { | |
530 | unsigned int refcnt; | |
531 | }; | |
532 | ||
533 | void | |
534 | bgp_connected_add (struct connected *ifc) | |
535 | { | |
536 | struct prefix p; | |
537 | struct prefix *addr; | |
538 | struct interface *ifp; | |
539 | struct bgp_node *rn; | |
540 | struct bgp_connected_ref *bc; | |
541 | ||
542 | ifp = ifc->ifp; | |
543 | ||
544 | if (! ifp) | |
545 | return; | |
546 | ||
547 | if (if_is_loopback (ifp)) | |
548 | return; | |
549 | ||
550 | addr = ifc->address; | |
551 | ||
552 | if (addr->family == AF_INET) | |
553 | { | |
554 | PREFIX_COPY_IPV4(&p, CONNECTED_PREFIX(ifc)); | |
555 | apply_mask_ipv4 ((struct prefix_ipv4 *) &p); | |
556 | ||
557 | if (prefix_ipv4_any ((struct prefix_ipv4 *) &p)) | |
558 | return; | |
559 | ||
560 | rn = bgp_node_get (bgp_connected_table[AFI_IP], (struct prefix *) &p); | |
561 | if (rn->info) | |
562 | { | |
563 | bc = rn->info; | |
564 | bc->refcnt++; | |
565 | } | |
566 | else | |
567 | { | |
568 | bc = XCALLOC (MTYPE_BGP_CONN, sizeof (struct bgp_connected_ref)); | |
569 | bc->refcnt = 1; | |
570 | rn->info = bc; | |
571 | } | |
572 | } | |
573 | #ifdef HAVE_IPV6 | |
574 | else if (addr->family == AF_INET6) | |
575 | { | |
576 | PREFIX_COPY_IPV6(&p, CONNECTED_PREFIX(ifc)); | |
577 | apply_mask_ipv6 ((struct prefix_ipv6 *) &p); | |
578 | ||
579 | if (IN6_IS_ADDR_UNSPECIFIED (&p.u.prefix6)) | |
580 | return; | |
581 | ||
582 | if (IN6_IS_ADDR_LINKLOCAL (&p.u.prefix6)) | |
583 | return; | |
584 | ||
585 | rn = bgp_node_get (bgp_connected_table[AFI_IP6], (struct prefix *) &p); | |
586 | if (rn->info) | |
587 | { | |
588 | bc = rn->info; | |
589 | bc->refcnt++; | |
590 | } | |
591 | else | |
592 | { | |
593 | bc = XCALLOC (MTYPE_BGP_CONN, sizeof (struct bgp_connected_ref)); | |
594 | bc->refcnt = 1; | |
595 | rn->info = bc; | |
596 | } | |
597 | } | |
598 | #endif /* HAVE_IPV6 */ | |
599 | } | |
600 | ||
601 | void | |
602 | bgp_connected_delete (struct connected *ifc) | |
603 | { | |
604 | struct prefix p; | |
605 | struct prefix *addr; | |
606 | struct interface *ifp; | |
607 | struct bgp_node *rn; | |
608 | struct bgp_connected_ref *bc; | |
609 | ||
610 | ifp = ifc->ifp; | |
611 | ||
612 | if (if_is_loopback (ifp)) | |
613 | return; | |
614 | ||
615 | addr = ifc->address; | |
616 | ||
617 | if (addr->family == AF_INET) | |
618 | { | |
619 | PREFIX_COPY_IPV4(&p, CONNECTED_PREFIX(ifc)); | |
620 | apply_mask_ipv4 ((struct prefix_ipv4 *) &p); | |
621 | ||
622 | if (prefix_ipv4_any ((struct prefix_ipv4 *) &p)) | |
623 | return; | |
624 | ||
625 | rn = bgp_node_lookup (bgp_connected_table[AFI_IP], &p); | |
626 | if (! rn) | |
627 | return; | |
628 | ||
629 | bc = rn->info; | |
630 | bc->refcnt--; | |
631 | if (bc->refcnt == 0) | |
632 | { | |
633 | XFREE (MTYPE_BGP_CONN, bc); | |
634 | rn->info = NULL; | |
635 | } | |
636 | bgp_unlock_node (rn); | |
637 | bgp_unlock_node (rn); | |
638 | } | |
639 | #ifdef HAVE_IPV6 | |
640 | else if (addr->family == AF_INET6) | |
641 | { | |
642 | PREFIX_COPY_IPV6(&p, CONNECTED_PREFIX(ifc)); | |
643 | apply_mask_ipv6 ((struct prefix_ipv6 *) &p); | |
644 | ||
645 | if (IN6_IS_ADDR_UNSPECIFIED (&p.u.prefix6)) | |
646 | return; | |
647 | ||
648 | if (IN6_IS_ADDR_LINKLOCAL (&p.u.prefix6)) | |
649 | return; | |
650 | ||
651 | rn = bgp_node_lookup (bgp_connected_table[AFI_IP6], (struct prefix *) &p); | |
652 | if (! rn) | |
653 | return; | |
654 | ||
655 | bc = rn->info; | |
656 | bc->refcnt--; | |
657 | if (bc->refcnt == 0) | |
658 | { | |
659 | XFREE (MTYPE_BGP_CONN, bc); | |
660 | rn->info = NULL; | |
661 | } | |
662 | bgp_unlock_node (rn); | |
663 | bgp_unlock_node (rn); | |
664 | } | |
665 | #endif /* HAVE_IPV6 */ | |
666 | } | |
667 | ||
668 | int | |
669 | bgp_nexthop_self (afi_t afi, struct attr *attr) | |
670 | { | |
671 | struct listnode *node; | |
672 | struct listnode *node2; | |
673 | struct interface *ifp; | |
674 | struct connected *ifc; | |
675 | struct prefix *p; | |
676 | ||
677 | for (ALL_LIST_ELEMENTS_RO (iflist, node, ifp)) | |
678 | { | |
679 | for (ALL_LIST_ELEMENTS_RO (ifp->connected, node2, ifc)) | |
680 | { | |
681 | p = ifc->address; | |
682 | ||
683 | if (p && p->family == AF_INET | |
684 | && IPV4_ADDR_SAME (&p->u.prefix4, &attr->nexthop)) | |
685 | return 1; | |
686 | } | |
687 | } | |
688 | return 0; | |
689 | } | |
690 | \f | |
691 | static struct bgp_nexthop_cache * | |
692 | zlookup_read (void) | |
693 | { | |
694 | struct stream *s; | |
695 | uint16_t length; | |
696 | u_char marker; | |
697 | u_char version; | |
698 | uint16_t command; | |
699 | int nbytes; | |
700 | struct in_addr raddr; | |
701 | uint32_t metric; | |
702 | int i; | |
703 | u_char nexthop_num; | |
704 | struct nexthop *nexthop; | |
705 | struct bgp_nexthop_cache *bnc; | |
706 | ||
707 | s = zlookup->ibuf; | |
708 | stream_reset (s); | |
709 | ||
710 | nbytes = stream_read (s, zlookup->sock, 2); | |
711 | length = stream_getw (s); | |
712 | ||
713 | nbytes = stream_read (s, zlookup->sock, length - 2); | |
714 | marker = stream_getc (s); | |
715 | version = stream_getc (s); | |
716 | ||
717 | if (version != ZSERV_VERSION || marker != ZEBRA_HEADER_MARKER) | |
718 | { | |
719 | zlog_err("%s: socket %d version mismatch, marker %d, version %d", | |
720 | __func__, zlookup->sock, marker, version); | |
721 | return NULL; | |
722 | } | |
723 | ||
724 | command = stream_getw (s); | |
725 | ||
726 | raddr.s_addr = stream_get_ipv4 (s); | |
727 | metric = stream_getl (s); | |
728 | nexthop_num = stream_getc (s); | |
729 | ||
730 | if (nexthop_num) | |
731 | { | |
732 | bnc = bnc_new (); | |
733 | bnc->valid = 1; | |
734 | bnc->metric = metric; | |
735 | bnc->nexthop_num = nexthop_num; | |
736 | ||
737 | for (i = 0; i < nexthop_num; i++) | |
738 | { | |
739 | nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); | |
740 | nexthop->type = stream_getc (s); | |
741 | switch (nexthop->type) | |
742 | { | |
743 | case ZEBRA_NEXTHOP_IPV4: | |
744 | nexthop->gate.ipv4.s_addr = stream_get_ipv4 (s); | |
745 | break; | |
746 | case ZEBRA_NEXTHOP_IFINDEX: | |
747 | case ZEBRA_NEXTHOP_IFNAME: | |
748 | nexthop->ifindex = stream_getl (s); | |
749 | break; | |
750 | default: | |
751 | /* do nothing */ | |
752 | break; | |
753 | } | |
754 | bnc_nexthop_add (bnc, nexthop); | |
755 | } | |
756 | } | |
757 | else | |
758 | return NULL; | |
759 | ||
760 | return bnc; | |
761 | } | |
762 | ||
763 | struct bgp_nexthop_cache * | |
764 | zlookup_query (struct in_addr addr) | |
765 | { | |
766 | int ret; | |
767 | struct stream *s; | |
768 | ||
769 | /* Check socket. */ | |
770 | if (zlookup->sock < 0) | |
771 | return NULL; | |
772 | ||
773 | s = zlookup->obuf; | |
774 | stream_reset (s); | |
775 | zclient_create_header (s, ZEBRA_IPV4_NEXTHOP_LOOKUP); | |
776 | stream_put_in_addr (s, &addr); | |
777 | ||
778 | stream_putw_at (s, 0, stream_get_endp (s)); | |
779 | ||
780 | ret = writen (zlookup->sock, s->data, stream_get_endp (s)); | |
781 | if (ret < 0) | |
782 | { | |
783 | zlog_err ("can't write to zlookup->sock"); | |
784 | close (zlookup->sock); | |
785 | zlookup->sock = -1; | |
786 | return NULL; | |
787 | } | |
788 | if (ret == 0) | |
789 | { | |
790 | zlog_err ("zlookup->sock connection closed"); | |
791 | close (zlookup->sock); | |
792 | zlookup->sock = -1; | |
793 | return NULL; | |
794 | } | |
795 | ||
796 | return zlookup_read (); | |
797 | } | |
798 | ||
799 | #ifdef HAVE_IPV6 | |
800 | static struct bgp_nexthop_cache * | |
801 | zlookup_read_ipv6 (void) | |
802 | { | |
803 | struct stream *s; | |
804 | uint16_t length; | |
805 | u_char version, marker; | |
806 | uint16_t command; | |
807 | int nbytes; | |
808 | struct in6_addr raddr; | |
809 | uint32_t metric; | |
810 | int i; | |
811 | u_char nexthop_num; | |
812 | struct nexthop *nexthop; | |
813 | struct bgp_nexthop_cache *bnc; | |
814 | ||
815 | s = zlookup->ibuf; | |
816 | stream_reset (s); | |
817 | ||
818 | nbytes = stream_read (s, zlookup->sock, 2); | |
819 | length = stream_getw (s); | |
820 | ||
821 | nbytes = stream_read (s, zlookup->sock, length - 2); | |
822 | marker = stream_getc (s); | |
823 | version = stream_getc (s); | |
824 | ||
825 | if (version != ZSERV_VERSION || marker != ZEBRA_HEADER_MARKER) | |
826 | { | |
827 | zlog_err("%s: socket %d version mismatch, marker %d, version %d", | |
828 | __func__, zlookup->sock, marker, version); | |
829 | return NULL; | |
830 | } | |
831 | ||
832 | command = stream_getw (s); | |
833 | ||
834 | stream_get (&raddr, s, 16); | |
835 | ||
836 | metric = stream_getl (s); | |
837 | nexthop_num = stream_getc (s); | |
838 | ||
839 | if (nexthop_num) | |
840 | { | |
841 | bnc = bnc_new (); | |
842 | bnc->valid = 1; | |
843 | bnc->metric = metric; | |
844 | bnc->nexthop_num = nexthop_num; | |
845 | ||
846 | for (i = 0; i < nexthop_num; i++) | |
847 | { | |
848 | nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); | |
849 | nexthop->type = stream_getc (s); | |
850 | switch (nexthop->type) | |
851 | { | |
852 | case ZEBRA_NEXTHOP_IPV6: | |
853 | stream_get (&nexthop->gate.ipv6, s, 16); | |
854 | break; | |
855 | case ZEBRA_NEXTHOP_IPV6_IFINDEX: | |
856 | case ZEBRA_NEXTHOP_IPV6_IFNAME: | |
857 | stream_get (&nexthop->gate.ipv6, s, 16); | |
858 | nexthop->ifindex = stream_getl (s); | |
859 | break; | |
860 | case ZEBRA_NEXTHOP_IFINDEX: | |
861 | case ZEBRA_NEXTHOP_IFNAME: | |
862 | nexthop->ifindex = stream_getl (s); | |
863 | break; | |
864 | default: | |
865 | /* do nothing */ | |
866 | break; | |
867 | } | |
868 | bnc_nexthop_add (bnc, nexthop); | |
869 | } | |
870 | } | |
871 | else | |
872 | return NULL; | |
873 | ||
874 | return bnc; | |
875 | } | |
876 | ||
877 | struct bgp_nexthop_cache * | |
878 | zlookup_query_ipv6 (struct in6_addr *addr) | |
879 | { | |
880 | int ret; | |
881 | struct stream *s; | |
882 | ||
883 | /* Check socket. */ | |
884 | if (zlookup->sock < 0) | |
885 | return NULL; | |
886 | ||
887 | s = zlookup->obuf; | |
888 | stream_reset (s); | |
889 | zclient_create_header (s, ZEBRA_IPV6_NEXTHOP_LOOKUP); | |
890 | stream_put (s, addr, 16); | |
891 | stream_putw_at (s, 0, stream_get_endp (s)); | |
892 | ||
893 | ret = writen (zlookup->sock, s->data, stream_get_endp (s)); | |
894 | if (ret < 0) | |
895 | { | |
896 | zlog_err ("can't write to zlookup->sock"); | |
897 | close (zlookup->sock); | |
898 | zlookup->sock = -1; | |
899 | return NULL; | |
900 | } | |
901 | if (ret == 0) | |
902 | { | |
903 | zlog_err ("zlookup->sock connection closed"); | |
904 | close (zlookup->sock); | |
905 | zlookup->sock = -1; | |
906 | return NULL; | |
907 | } | |
908 | ||
909 | return zlookup_read_ipv6 (); | |
910 | } | |
911 | #endif /* HAVE_IPV6 */ | |
912 | ||
913 | static int | |
914 | bgp_import_check (struct prefix *p, u_int32_t *igpmetric, | |
915 | struct in_addr *igpnexthop) | |
916 | { | |
917 | struct stream *s; | |
918 | int ret; | |
919 | u_int16_t length, command; | |
920 | u_char version, marker; | |
921 | int nbytes; | |
922 | struct in_addr addr; | |
923 | struct in_addr nexthop; | |
924 | u_int32_t metric = 0; | |
925 | u_char nexthop_num; | |
926 | u_char nexthop_type; | |
927 | ||
928 | /* If lookup connection is not available return valid. */ | |
929 | if (zlookup->sock < 0) | |
930 | { | |
931 | if (igpmetric) | |
932 | *igpmetric = 0; | |
933 | return 1; | |
934 | } | |
935 | ||
936 | /* Send query to the lookup connection */ | |
937 | s = zlookup->obuf; | |
938 | stream_reset (s); | |
939 | zclient_create_header (s, ZEBRA_IPV4_IMPORT_LOOKUP); | |
940 | ||
941 | stream_putc (s, p->prefixlen); | |
942 | stream_put_in_addr (s, &p->u.prefix4); | |
943 | ||
944 | stream_putw_at (s, 0, stream_get_endp (s)); | |
945 | ||
946 | /* Write the packet. */ | |
947 | ret = writen (zlookup->sock, s->data, stream_get_endp (s)); | |
948 | ||
949 | if (ret < 0) | |
950 | { | |
951 | zlog_err ("can't write to zlookup->sock"); | |
952 | close (zlookup->sock); | |
953 | zlookup->sock = -1; | |
954 | return 1; | |
955 | } | |
956 | if (ret == 0) | |
957 | { | |
958 | zlog_err ("zlookup->sock connection closed"); | |
959 | close (zlookup->sock); | |
960 | zlookup->sock = -1; | |
961 | return 1; | |
962 | } | |
963 | ||
964 | /* Get result. */ | |
965 | stream_reset (s); | |
966 | ||
967 | /* Fetch length. */ | |
968 | nbytes = stream_read (s, zlookup->sock, 2); | |
969 | length = stream_getw (s); | |
970 | ||
971 | /* Fetch whole data. */ | |
972 | nbytes = stream_read (s, zlookup->sock, length - 2); | |
973 | marker = stream_getc (s); | |
974 | version = stream_getc (s); | |
975 | ||
976 | if (version != ZSERV_VERSION || marker != ZEBRA_HEADER_MARKER) | |
977 | { | |
978 | zlog_err("%s: socket %d version mismatch, marker %d, version %d", | |
979 | __func__, zlookup->sock, marker, version); | |
980 | return 0; | |
981 | } | |
982 | ||
983 | command = stream_getw (s); | |
984 | ||
985 | addr.s_addr = stream_get_ipv4 (s); | |
986 | metric = stream_getl (s); | |
987 | nexthop_num = stream_getc (s); | |
988 | ||
989 | /* Set IGP metric value. */ | |
990 | if (igpmetric) | |
991 | *igpmetric = metric; | |
992 | ||
993 | /* If there is nexthop then this is active route. */ | |
994 | if (nexthop_num) | |
995 | { | |
996 | nexthop.s_addr = 0; | |
997 | nexthop_type = stream_getc (s); | |
998 | if (nexthop_type == ZEBRA_NEXTHOP_IPV4) | |
999 | { | |
1000 | nexthop.s_addr = stream_get_ipv4 (s); | |
1001 | if (igpnexthop) | |
1002 | *igpnexthop = nexthop; | |
1003 | } | |
1004 | else | |
1005 | *igpnexthop = nexthop; | |
1006 | ||
1007 | return 1; | |
1008 | } | |
1009 | else | |
1010 | return 0; | |
1011 | } | |
1012 | ||
1013 | /* Scan all configured BGP route then check the route exists in IGP or | |
1014 | not. */ | |
1015 | static int | |
1016 | bgp_import (struct thread *t) | |
1017 | { | |
1018 | struct bgp *bgp; | |
1019 | struct bgp_node *rn; | |
1020 | struct bgp_static *bgp_static; | |
1021 | struct listnode *node, *nnode; | |
1022 | int valid; | |
1023 | u_int32_t metric; | |
1024 | struct in_addr nexthop; | |
1025 | afi_t afi; | |
1026 | safi_t safi; | |
1027 | ||
1028 | bgp_import_thread = | |
1029 | thread_add_timer (master, bgp_import, NULL, bgp_import_interval); | |
1030 | ||
1031 | if (BGP_DEBUG (events, EVENTS)) | |
1032 | zlog_debug ("Import timer expired."); | |
1033 | ||
1034 | for (ALL_LIST_ELEMENTS (bm->bgp, node, nnode, bgp)) | |
1035 | { | |
1036 | for (afi = AFI_IP; afi < AFI_MAX; afi++) | |
1037 | for (safi = SAFI_UNICAST; safi < SAFI_MPLS_VPN; safi++) | |
1038 | for (rn = bgp_table_top (bgp->route[afi][safi]); rn; | |
1039 | rn = bgp_route_next (rn)) | |
1040 | if ((bgp_static = rn->info) != NULL) | |
1041 | { | |
1042 | if (bgp_static->backdoor) | |
1043 | continue; | |
1044 | ||
1045 | valid = bgp_static->valid; | |
1046 | metric = bgp_static->igpmetric; | |
1047 | nexthop = bgp_static->igpnexthop; | |
1048 | ||
1049 | if (bgp_flag_check (bgp, BGP_FLAG_IMPORT_CHECK) | |
1050 | && afi == AFI_IP && safi == SAFI_UNICAST) | |
1051 | bgp_static->valid = bgp_import_check (&rn->p, &bgp_static->igpmetric, | |
1052 | &bgp_static->igpnexthop); | |
1053 | else | |
1054 | { | |
1055 | bgp_static->valid = 1; | |
1056 | bgp_static->igpmetric = 0; | |
1057 | bgp_static->igpnexthop.s_addr = 0; | |
1058 | } | |
1059 | ||
1060 | if (bgp_static->valid != valid) | |
1061 | { | |
1062 | if (bgp_static->valid) | |
1063 | bgp_static_update (bgp, &rn->p, bgp_static, afi, safi); | |
1064 | else | |
1065 | bgp_static_withdraw (bgp, &rn->p, afi, safi); | |
1066 | } | |
1067 | else if (bgp_static->valid) | |
1068 | { | |
1069 | if (bgp_static->igpmetric != metric | |
1070 | || bgp_static->igpnexthop.s_addr != nexthop.s_addr | |
1071 | || bgp_static->rmap.name) | |
1072 | bgp_static_update (bgp, &rn->p, bgp_static, afi, safi); | |
1073 | } | |
1074 | } | |
1075 | } | |
1076 | return 0; | |
1077 | } | |
1078 | ||
1079 | /* Connect to zebra for nexthop lookup. */ | |
1080 | static int | |
1081 | zlookup_connect (struct thread *t) | |
1082 | { | |
1083 | struct zclient *zlookup; | |
1084 | ||
1085 | zlookup = THREAD_ARG (t); | |
1086 | zlookup->t_connect = NULL; | |
1087 | ||
1088 | if (zlookup->sock != -1) | |
1089 | return 0; | |
1090 | ||
1091 | if (zclient_socket_connect (zlookup) < 0) | |
1092 | return -1; | |
1093 | ||
1094 | return 0; | |
1095 | } | |
1096 | ||
1097 | /* Check specified multiaccess next-hop. */ | |
1098 | int | |
1099 | bgp_multiaccess_check_v4 (struct in_addr nexthop, char *peer) | |
1100 | { | |
1101 | struct bgp_node *rn1; | |
1102 | struct bgp_node *rn2; | |
1103 | struct prefix p1; | |
1104 | struct prefix p2; | |
1105 | struct in_addr addr; | |
1106 | int ret; | |
1107 | ||
1108 | ret = inet_aton (peer, &addr); | |
1109 | if (! ret) | |
1110 | return 0; | |
1111 | ||
1112 | memset (&p1, 0, sizeof (struct prefix)); | |
1113 | p1.family = AF_INET; | |
1114 | p1.prefixlen = IPV4_MAX_BITLEN; | |
1115 | p1.u.prefix4 = nexthop; | |
1116 | memset (&p2, 0, sizeof (struct prefix)); | |
1117 | p2.family = AF_INET; | |
1118 | p2.prefixlen = IPV4_MAX_BITLEN; | |
1119 | p2.u.prefix4 = addr; | |
1120 | ||
1121 | /* If bgp scan is not enabled, return invalid. */ | |
1122 | if (zlookup->sock < 0) | |
1123 | return 0; | |
1124 | ||
1125 | rn1 = bgp_node_match (bgp_connected_table[AFI_IP], &p1); | |
1126 | if (! rn1) | |
1127 | return 0; | |
1128 | bgp_unlock_node (rn1); | |
1129 | ||
1130 | rn2 = bgp_node_match (bgp_connected_table[AFI_IP], &p2); | |
1131 | if (! rn2) | |
1132 | return 0; | |
1133 | bgp_unlock_node (rn2); | |
1134 | ||
1135 | /* This is safe, even with above unlocks, since we are just | |
1136 | comparing pointers to the objects, not the objects themselves. */ | |
1137 | if (rn1 == rn2) | |
1138 | return 1; | |
1139 | ||
1140 | return 0; | |
1141 | } | |
1142 | \f | |
1143 | DEFUN (bgp_scan_time, | |
1144 | bgp_scan_time_cmd, | |
1145 | "bgp scan-time <5-60>", | |
1146 | "BGP specific commands\n" | |
1147 | "Configure background scanner interval\n" | |
1148 | "Scanner interval (seconds)\n") | |
1149 | { | |
1150 | bgp_scan_interval = atoi (argv[0]); | |
1151 | ||
1152 | if (bgp_scan_thread) | |
1153 | { | |
1154 | thread_cancel (bgp_scan_thread); | |
1155 | bgp_scan_thread = | |
1156 | thread_add_timer (master, bgp_scan_timer, NULL, bgp_scan_interval); | |
1157 | } | |
1158 | ||
1159 | return CMD_SUCCESS; | |
1160 | } | |
1161 | ||
1162 | DEFUN (no_bgp_scan_time, | |
1163 | no_bgp_scan_time_cmd, | |
1164 | "no bgp scan-time", | |
1165 | NO_STR | |
1166 | "BGP specific commands\n" | |
1167 | "Configure background scanner interval\n") | |
1168 | { | |
1169 | bgp_scan_interval = BGP_SCAN_INTERVAL_DEFAULT; | |
1170 | ||
1171 | if (bgp_scan_thread) | |
1172 | { | |
1173 | thread_cancel (bgp_scan_thread); | |
1174 | bgp_scan_thread = | |
1175 | thread_add_timer (master, bgp_scan_timer, NULL, bgp_scan_interval); | |
1176 | } | |
1177 | ||
1178 | return CMD_SUCCESS; | |
1179 | } | |
1180 | ||
1181 | ALIAS (no_bgp_scan_time, | |
1182 | no_bgp_scan_time_val_cmd, | |
1183 | "no bgp scan-time <5-60>", | |
1184 | NO_STR | |
1185 | "BGP specific commands\n" | |
1186 | "Configure background scanner interval\n" | |
1187 | "Scanner interval (seconds)\n") | |
1188 | ||
1189 | static int | |
1190 | show_ip_bgp_scan_tables (struct vty *vty, const char detail) | |
1191 | { | |
1192 | struct bgp_node *rn; | |
1193 | struct bgp_nexthop_cache *bnc; | |
1194 | char buf[INET6_ADDRSTRLEN]; | |
1195 | u_char i; | |
1196 | ||
1197 | if (bgp_scan_thread) | |
1198 | vty_out (vty, "BGP scan is running%s", VTY_NEWLINE); | |
1199 | else | |
1200 | vty_out (vty, "BGP scan is not running%s", VTY_NEWLINE); | |
1201 | vty_out (vty, "BGP scan interval is %d%s", bgp_scan_interval, VTY_NEWLINE); | |
1202 | ||
1203 | vty_out (vty, "Current BGP nexthop cache:%s", VTY_NEWLINE); | |
1204 | for (rn = bgp_table_top (bgp_nexthop_cache_table[AFI_IP]); rn; rn = bgp_route_next (rn)) | |
1205 | if ((bnc = rn->info) != NULL) | |
1206 | { | |
1207 | if (bnc->valid) | |
1208 | { | |
1209 | vty_out (vty, " %s valid [IGP metric %d]%s", | |
1210 | inet_ntop (AF_INET, &rn->p.u.prefix4, buf, INET6_ADDRSTRLEN), bnc->metric, VTY_NEWLINE); | |
1211 | if (detail) | |
1212 | for (i = 0; i < bnc->nexthop_num; i++) | |
1213 | switch (bnc->nexthop[i].type) | |
1214 | { | |
1215 | case NEXTHOP_TYPE_IPV4: | |
1216 | vty_out (vty, " gate %s%s", inet_ntop (AF_INET, &bnc->nexthop[i].gate.ipv4, buf, INET6_ADDRSTRLEN), VTY_NEWLINE); | |
1217 | break; | |
1218 | case NEXTHOP_TYPE_IFINDEX: | |
1219 | vty_out (vty, " ifidx %u%s", bnc->nexthop[i].ifindex, VTY_NEWLINE); | |
1220 | break; | |
1221 | default: | |
1222 | vty_out (vty, " invalid nexthop type %u%s", bnc->nexthop[i].type, VTY_NEWLINE); | |
1223 | } | |
1224 | } | |
1225 | else | |
1226 | vty_out (vty, " %s invalid%s", | |
1227 | inet_ntop (AF_INET, &rn->p.u.prefix4, buf, INET6_ADDRSTRLEN), VTY_NEWLINE); | |
1228 | } | |
1229 | ||
1230 | #ifdef HAVE_IPV6 | |
1231 | { | |
1232 | for (rn = bgp_table_top (bgp_nexthop_cache_table[AFI_IP6]); | |
1233 | rn; | |
1234 | rn = bgp_route_next (rn)) | |
1235 | if ((bnc = rn->info) != NULL) | |
1236 | { | |
1237 | if (bnc->valid) | |
1238 | { | |
1239 | vty_out (vty, " %s valid [IGP metric %d]%s", | |
1240 | inet_ntop (AF_INET6, &rn->p.u.prefix6, buf, INET6_ADDRSTRLEN), | |
1241 | bnc->metric, VTY_NEWLINE); | |
1242 | if (detail) | |
1243 | for (i = 0; i < bnc->nexthop_num; i++) | |
1244 | switch (bnc->nexthop[i].type) | |
1245 | { | |
1246 | case NEXTHOP_TYPE_IPV6: | |
1247 | vty_out (vty, " gate %s%s", inet_ntop (AF_INET6, &bnc->nexthop[i].gate.ipv6, buf, INET6_ADDRSTRLEN), VTY_NEWLINE); | |
1248 | break; | |
1249 | case NEXTHOP_TYPE_IFINDEX: | |
1250 | vty_out (vty, " ifidx %u%s", bnc->nexthop[i].ifindex, VTY_NEWLINE); | |
1251 | break; | |
1252 | default: | |
1253 | vty_out (vty, " invalid nexthop type %u%s", bnc->nexthop[i].type, VTY_NEWLINE); | |
1254 | } | |
1255 | } | |
1256 | else | |
1257 | vty_out (vty, " %s invalid%s", | |
1258 | inet_ntop (AF_INET6, &rn->p.u.prefix6, buf, INET6_ADDRSTRLEN), | |
1259 | VTY_NEWLINE); | |
1260 | } | |
1261 | } | |
1262 | #endif /* HAVE_IPV6 */ | |
1263 | ||
1264 | vty_out (vty, "BGP connected route:%s", VTY_NEWLINE); | |
1265 | for (rn = bgp_table_top (bgp_connected_table[AFI_IP]); | |
1266 | rn; | |
1267 | rn = bgp_route_next (rn)) | |
1268 | if (rn->info != NULL) | |
1269 | vty_out (vty, " %s/%d%s", inet_ntoa (rn->p.u.prefix4), rn->p.prefixlen, | |
1270 | VTY_NEWLINE); | |
1271 | ||
1272 | #ifdef HAVE_IPV6 | |
1273 | { | |
1274 | for (rn = bgp_table_top (bgp_connected_table[AFI_IP6]); | |
1275 | rn; | |
1276 | rn = bgp_route_next (rn)) | |
1277 | if (rn->info != NULL) | |
1278 | vty_out (vty, " %s/%d%s", | |
1279 | inet_ntop (AF_INET6, &rn->p.u.prefix6, buf, INET6_ADDRSTRLEN), | |
1280 | rn->p.prefixlen, | |
1281 | VTY_NEWLINE); | |
1282 | } | |
1283 | #endif /* HAVE_IPV6 */ | |
1284 | ||
1285 | return CMD_SUCCESS; | |
1286 | } | |
1287 | ||
1288 | DEFUN (show_ip_bgp_scan, | |
1289 | show_ip_bgp_scan_cmd, | |
1290 | "show ip bgp scan", | |
1291 | SHOW_STR | |
1292 | IP_STR | |
1293 | BGP_STR | |
1294 | "BGP scan status\n") | |
1295 | { | |
1296 | return show_ip_bgp_scan_tables (vty, 0); | |
1297 | } | |
1298 | ||
1299 | DEFUN (show_ip_bgp_scan_detail, | |
1300 | show_ip_bgp_scan_detail_cmd, | |
1301 | "show ip bgp scan detail", | |
1302 | SHOW_STR | |
1303 | IP_STR | |
1304 | BGP_STR | |
1305 | "BGP scan status\n" | |
1306 | "More detailed output\n") | |
1307 | { | |
1308 | return show_ip_bgp_scan_tables (vty, 1); | |
1309 | } | |
1310 | ||
1311 | int | |
1312 | bgp_config_write_scan_time (struct vty *vty) | |
1313 | { | |
1314 | if (bgp_scan_interval != BGP_SCAN_INTERVAL_DEFAULT) | |
1315 | vty_out (vty, " bgp scan-time %d%s", bgp_scan_interval, VTY_NEWLINE); | |
1316 | return CMD_SUCCESS; | |
1317 | } | |
1318 | ||
1319 | void | |
1320 | bgp_scan_init (void) | |
1321 | { | |
1322 | zlookup = zclient_new (); | |
1323 | zlookup->sock = -1; | |
1324 | zlookup->t_connect = thread_add_event (master, zlookup_connect, zlookup, 0); | |
1325 | ||
1326 | bgp_scan_interval = BGP_SCAN_INTERVAL_DEFAULT; | |
1327 | bgp_import_interval = BGP_IMPORT_INTERVAL_DEFAULT; | |
1328 | ||
1329 | cache1_table[AFI_IP] = bgp_table_init (AFI_IP, SAFI_UNICAST); | |
1330 | cache2_table[AFI_IP] = bgp_table_init (AFI_IP, SAFI_UNICAST); | |
1331 | bgp_nexthop_cache_table[AFI_IP] = cache1_table[AFI_IP]; | |
1332 | ||
1333 | bgp_connected_table[AFI_IP] = bgp_table_init (AFI_IP, SAFI_UNICAST); | |
1334 | ||
1335 | #ifdef HAVE_IPV6 | |
1336 | cache1_table[AFI_IP6] = bgp_table_init (AFI_IP6, SAFI_UNICAST); | |
1337 | cache2_table[AFI_IP6] = bgp_table_init (AFI_IP6, SAFI_UNICAST); | |
1338 | bgp_nexthop_cache_table[AFI_IP6] = cache1_table[AFI_IP6]; | |
1339 | bgp_connected_table[AFI_IP6] = bgp_table_init (AFI_IP6, SAFI_UNICAST); | |
1340 | #endif /* HAVE_IPV6 */ | |
1341 | ||
1342 | /* Make BGP scan thread. */ | |
1343 | bgp_scan_thread = thread_add_timer (master, bgp_scan_timer, | |
1344 | NULL, bgp_scan_interval); | |
1345 | /* Make BGP import there. */ | |
1346 | bgp_import_thread = thread_add_timer (master, bgp_import, NULL, 0); | |
1347 | ||
1348 | install_element (BGP_NODE, &bgp_scan_time_cmd); | |
1349 | install_element (BGP_NODE, &no_bgp_scan_time_cmd); | |
1350 | install_element (BGP_NODE, &no_bgp_scan_time_val_cmd); | |
1351 | install_element (VIEW_NODE, &show_ip_bgp_scan_cmd); | |
1352 | install_element (VIEW_NODE, &show_ip_bgp_scan_detail_cmd); | |
1353 | install_element (RESTRICTED_NODE, &show_ip_bgp_scan_cmd); | |
1354 | install_element (ENABLE_NODE, &show_ip_bgp_scan_cmd); | |
1355 | install_element (ENABLE_NODE, &show_ip_bgp_scan_detail_cmd); | |
1356 | } | |
1357 | ||
1358 | void | |
1359 | bgp_scan_finish (void) | |
1360 | { | |
1361 | /* Only the current one needs to be reset. */ | |
1362 | bgp_nexthop_cache_reset (bgp_nexthop_cache_table[AFI_IP]); | |
1363 | ||
1364 | bgp_table_unlock (cache1_table[AFI_IP]); | |
1365 | cache1_table[AFI_IP] = NULL; | |
1366 | ||
1367 | bgp_table_unlock (cache2_table[AFI_IP]); | |
1368 | cache2_table[AFI_IP] = NULL; | |
1369 | ||
1370 | bgp_table_unlock (bgp_connected_table[AFI_IP]); | |
1371 | bgp_connected_table[AFI_IP] = NULL; | |
1372 | ||
1373 | #ifdef HAVE_IPV6 | |
1374 | /* Only the current one needs to be reset. */ | |
1375 | bgp_nexthop_cache_reset (bgp_nexthop_cache_table[AFI_IP6]); | |
1376 | ||
1377 | bgp_table_unlock (cache1_table[AFI_IP6]); | |
1378 | cache1_table[AFI_IP6] = NULL; | |
1379 | ||
1380 | bgp_table_unlock (cache2_table[AFI_IP6]); | |
1381 | cache2_table[AFI_IP6] = NULL; | |
1382 | ||
1383 | bgp_table_unlock (bgp_connected_table[AFI_IP6]); | |
1384 | bgp_connected_table[AFI_IP6] = NULL; | |
1385 | #endif /* HAVE_IPV6 */ | |
1386 | } |