]>
Commit | Line | Data |
---|---|---|
718e3744 | 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 | struct thread *bgp_scan_thread = NULL; | |
49 | ||
50 | /* BGP import thread */ | |
51 | struct thread *bgp_import_thread = NULL; | |
52 | ||
53 | /* BGP scan interval. */ | |
54 | int bgp_scan_interval; | |
55 | ||
56 | /* BGP import interval. */ | |
57 | int bgp_import_interval; | |
58 | ||
59 | /* Route table for next-hop lookup cache. */ | |
60 | struct bgp_table *bgp_nexthop_cache_ipv4; | |
61 | struct bgp_table *cache1; | |
62 | struct bgp_table *cache2; | |
63 | ||
64 | /* Route table for next-hop lookup cache. */ | |
65 | struct bgp_table *bgp_nexthop_cache_ipv6; | |
66 | struct bgp_table *cache6_1; | |
67 | struct bgp_table *cache6_2; | |
68 | ||
69 | /* Route table for connected route. */ | |
70 | struct bgp_table *bgp_connected_ipv4; | |
71 | ||
72 | /* Route table for connected route. */ | |
73 | struct bgp_table *bgp_connected_ipv6; | |
74 | ||
75 | /* BGP nexthop lookup query client. */ | |
76 | static struct zclient *zlookup = NULL; | |
77 | ||
78 | /* BGP process function. */ | |
79 | int bgp_process (struct bgp *, struct bgp_node *, afi_t, safi_t); | |
80 | \f | |
81 | /* Add nexthop to the end of the list. */ | |
82 | void | |
83 | bnc_nexthop_add (struct bgp_nexthop_cache *bnc, struct nexthop *nexthop) | |
84 | { | |
85 | struct nexthop *last; | |
86 | ||
87 | for (last = bnc->nexthop; last && last->next; last = last->next) | |
88 | ; | |
89 | if (last) | |
90 | last->next = nexthop; | |
91 | else | |
92 | bnc->nexthop = nexthop; | |
93 | nexthop->prev = last; | |
94 | } | |
95 | ||
96 | void | |
97 | bnc_nexthop_free (struct bgp_nexthop_cache *bnc) | |
98 | { | |
99 | struct nexthop *nexthop; | |
100 | struct nexthop *next = NULL; | |
101 | ||
102 | for (nexthop = bnc->nexthop; nexthop; nexthop = next) | |
103 | { | |
104 | next = nexthop->next; | |
105 | XFREE (MTYPE_NEXTHOP, nexthop); | |
106 | } | |
107 | } | |
108 | ||
109 | struct bgp_nexthop_cache * | |
110 | bnc_new () | |
111 | { | |
112 | struct bgp_nexthop_cache *new; | |
113 | ||
114 | new = XMALLOC (MTYPE_BGP_NEXTHOP_CACHE, sizeof (struct bgp_nexthop_cache)); | |
115 | memset (new, 0, sizeof (struct bgp_nexthop_cache)); | |
116 | return new; | |
117 | } | |
118 | ||
119 | void | |
120 | bnc_free (struct bgp_nexthop_cache *bnc) | |
121 | { | |
122 | bnc_nexthop_free (bnc); | |
123 | XFREE (MTYPE_BGP_NEXTHOP_CACHE, bnc); | |
124 | } | |
125 | \f | |
126 | int | |
127 | bgp_nexthop_same (struct nexthop *next1, struct nexthop *next2) | |
128 | { | |
129 | if (next1->type != next2->type) | |
130 | return 0; | |
131 | ||
132 | switch (next1->type) | |
133 | { | |
134 | case ZEBRA_NEXTHOP_IPV4: | |
135 | if (! IPV4_ADDR_SAME (&next1->gate.ipv4, &next2->gate.ipv4)) | |
136 | return 0; | |
137 | break; | |
138 | case ZEBRA_NEXTHOP_IFINDEX: | |
139 | case ZEBRA_NEXTHOP_IFNAME: | |
140 | if (next1->ifindex != next2->ifindex) | |
141 | return 0; | |
142 | break; | |
143 | #ifdef HAVE_IPV6 | |
144 | case ZEBRA_NEXTHOP_IPV6: | |
145 | if (! IPV6_ADDR_SAME (&next1->gate.ipv6, &next2->gate.ipv6)) | |
146 | return 0; | |
147 | break; | |
148 | case ZEBRA_NEXTHOP_IPV6_IFINDEX: | |
149 | case ZEBRA_NEXTHOP_IPV6_IFNAME: | |
150 | if (! IPV6_ADDR_SAME (&next1->gate.ipv6, &next2->gate.ipv6)) | |
151 | return 0; | |
152 | if (next1->ifindex != next2->ifindex) | |
153 | return 0; | |
154 | break; | |
155 | #endif /* HAVE_IPV6 */ | |
156 | } | |
157 | return 1; | |
158 | } | |
159 | ||
160 | int | |
161 | bgp_nexthop_cache_changed (struct bgp_nexthop_cache *bnc1, | |
162 | struct bgp_nexthop_cache *bnc2) | |
163 | { | |
164 | int i; | |
165 | struct nexthop *next1, *next2; | |
166 | ||
167 | if (bnc1->nexthop_num != bnc2->nexthop_num) | |
168 | return 1; | |
169 | ||
170 | next1 = bnc1->nexthop; | |
171 | next2 = bnc2->nexthop; | |
172 | ||
173 | for (i = 0; i < bnc1->nexthop_num; i++) | |
174 | { | |
175 | if (! bgp_nexthop_same (next1, next2)) | |
176 | return 1; | |
177 | ||
178 | next1 = next1->next; | |
179 | next2 = next2->next; | |
180 | } | |
181 | return 0; | |
182 | } | |
183 | ||
184 | /* If nexthop exists on connected network return 1. */ | |
185 | int | |
186 | bgp_nexthop_check_ebgp (afi_t afi, struct attr *attr) | |
187 | { | |
188 | struct bgp_node *rn; | |
189 | ||
190 | /* If zebra is not enabled return */ | |
191 | if (zlookup->sock < 0) | |
192 | return 1; | |
193 | ||
194 | /* Lookup the address is onlink or not. */ | |
195 | if (afi == AFI_IP) | |
196 | { | |
197 | rn = bgp_node_match_ipv4 (bgp_connected_ipv4, &attr->nexthop); | |
198 | if (rn) | |
199 | { | |
200 | bgp_unlock_node (rn); | |
201 | return 1; | |
202 | } | |
203 | } | |
204 | #ifdef HAVE_IPV6 | |
205 | else if (afi == AFI_IP6) | |
206 | { | |
207 | if (attr->mp_nexthop_len == 32) | |
208 | return 1; | |
209 | else if (attr->mp_nexthop_len == 16) | |
210 | { | |
211 | if (IN6_IS_ADDR_LINKLOCAL (&attr->mp_nexthop_global)) | |
212 | return 1; | |
213 | ||
214 | rn = bgp_node_match_ipv6 (bgp_connected_ipv6, | |
215 | &attr->mp_nexthop_global); | |
216 | if (rn) | |
217 | { | |
218 | bgp_unlock_node (rn); | |
219 | return 1; | |
220 | } | |
221 | } | |
222 | } | |
223 | #endif /* HAVE_IPV6 */ | |
224 | return 0; | |
225 | } | |
226 | ||
227 | #ifdef HAVE_IPV6 | |
228 | /* Check specified next-hop is reachable or not. */ | |
229 | int | |
230 | bgp_nexthop_lookup_ipv6 (struct peer *peer, struct bgp_info *ri, int *changed, | |
231 | int *metricchanged) | |
232 | { | |
233 | struct bgp_node *rn; | |
234 | struct prefix p; | |
235 | struct bgp_nexthop_cache *bnc; | |
236 | struct attr *attr; | |
237 | ||
238 | /* If lookup is not enabled, return valid. */ | |
239 | if (zlookup->sock < 0) | |
240 | { | |
241 | ri->igpmetric = 0; | |
242 | return 1; | |
243 | } | |
244 | ||
245 | /* Only check IPv6 global address only nexthop. */ | |
246 | attr = ri->attr; | |
247 | ||
248 | if (attr->mp_nexthop_len != 16 | |
249 | || IN6_IS_ADDR_LINKLOCAL (&attr->mp_nexthop_global)) | |
250 | return 1; | |
251 | ||
252 | memset (&p, 0, sizeof (struct prefix)); | |
253 | p.family = AF_INET6; | |
254 | p.prefixlen = IPV6_MAX_BITLEN; | |
255 | p.u.prefix6 = attr->mp_nexthop_global; | |
256 | ||
257 | /* IBGP or ebgp-multihop */ | |
258 | rn = bgp_node_get (bgp_nexthop_cache_ipv6, &p); | |
259 | ||
260 | if (rn->info) | |
261 | { | |
262 | bnc = rn->info; | |
263 | bgp_unlock_node (rn); | |
264 | } | |
265 | else | |
266 | { | |
267 | bnc = zlookup_query_ipv6 (&attr->mp_nexthop_global); | |
268 | if (bnc) | |
269 | { | |
270 | struct bgp_table *old; | |
271 | struct bgp_node *oldrn; | |
272 | struct bgp_nexthop_cache *oldbnc; | |
273 | ||
274 | if (changed) | |
275 | { | |
276 | if (bgp_nexthop_cache_ipv6 == cache6_1) | |
277 | old = cache6_2; | |
278 | else | |
279 | old = cache6_1; | |
280 | ||
281 | oldrn = bgp_node_lookup (old, &p); | |
282 | if (oldrn) | |
283 | { | |
284 | oldbnc = oldrn->info; | |
285 | ||
286 | bnc->changed = bgp_nexthop_cache_changed (bnc, oldbnc); | |
287 | ||
288 | if (bnc->metric != oldbnc->metric) | |
289 | bnc->metricchanged = 1; | |
290 | } | |
291 | } | |
292 | } | |
293 | else | |
294 | { | |
295 | bnc = bnc_new (); | |
296 | bnc->valid = 0; | |
297 | } | |
298 | rn->info = bnc; | |
299 | } | |
300 | ||
301 | if (changed) | |
302 | *changed = bnc->changed; | |
303 | ||
304 | if (metricchanged) | |
305 | *metricchanged = bnc->metricchanged; | |
306 | ||
307 | if (bnc->valid) | |
308 | ri->igpmetric = bnc->metric; | |
309 | else | |
310 | ri->igpmetric = 0; | |
311 | ||
312 | return bnc->valid; | |
313 | } | |
314 | #endif /* HAVE_IPV6 */ | |
315 | ||
316 | /* Check specified next-hop is reachable or not. */ | |
317 | int | |
318 | bgp_nexthop_lookup (afi_t afi, struct peer *peer, struct bgp_info *ri, | |
319 | int *changed, int *metricchanged) | |
320 | { | |
321 | struct bgp_node *rn; | |
322 | struct prefix p; | |
323 | struct bgp_nexthop_cache *bnc; | |
324 | struct in_addr addr; | |
325 | ||
326 | /* If lookup is not enabled, return valid. */ | |
327 | if (zlookup->sock < 0) | |
328 | { | |
329 | ri->igpmetric = 0; | |
330 | return 1; | |
331 | } | |
332 | ||
333 | #ifdef HAVE_IPV6 | |
334 | if (afi == AFI_IP6) | |
335 | return bgp_nexthop_lookup_ipv6 (peer, ri, changed, metricchanged); | |
336 | #endif /* HAVE_IPV6 */ | |
337 | ||
338 | addr = ri->attr->nexthop; | |
339 | ||
340 | memset (&p, 0, sizeof (struct prefix)); | |
341 | p.family = AF_INET; | |
342 | p.prefixlen = IPV4_MAX_BITLEN; | |
343 | p.u.prefix4 = addr; | |
344 | ||
345 | /* IBGP or ebgp-multihop */ | |
346 | rn = bgp_node_get (bgp_nexthop_cache_ipv4, &p); | |
347 | ||
348 | if (rn->info) | |
349 | { | |
350 | bnc = rn->info; | |
351 | bgp_unlock_node (rn); | |
352 | } | |
353 | else | |
354 | { | |
355 | bnc = zlookup_query (addr); | |
356 | if (bnc) | |
357 | { | |
358 | struct bgp_table *old; | |
359 | struct bgp_node *oldrn; | |
360 | struct bgp_nexthop_cache *oldbnc; | |
361 | ||
362 | if (changed) | |
363 | { | |
364 | if (bgp_nexthop_cache_ipv4 == cache1) | |
365 | old = cache2; | |
366 | else | |
367 | old = cache1; | |
368 | ||
369 | oldrn = bgp_node_lookup (old, &p); | |
370 | if (oldrn) | |
371 | { | |
372 | oldbnc = oldrn->info; | |
373 | ||
374 | bnc->changed = bgp_nexthop_cache_changed (bnc, oldbnc); | |
375 | ||
376 | if (bnc->metric != oldbnc->metric) | |
377 | bnc->metricchanged = 1; | |
378 | } | |
379 | } | |
380 | } | |
381 | else | |
382 | { | |
383 | bnc = bnc_new (); | |
384 | bnc->valid = 0; | |
385 | } | |
386 | rn->info = bnc; | |
387 | } | |
388 | ||
389 | if (changed) | |
390 | *changed = bnc->changed; | |
391 | ||
392 | if (metricchanged) | |
393 | *metricchanged = bnc->metricchanged; | |
394 | ||
395 | if (bnc->valid) | |
396 | ri->igpmetric = bnc->metric; | |
397 | else | |
398 | ri->igpmetric = 0; | |
399 | ||
400 | return bnc->valid; | |
401 | } | |
402 | ||
403 | /* Reset and free all BGP nexthop cache. */ | |
404 | void | |
405 | bgp_nexthop_cache_reset (struct bgp_table *table) | |
406 | { | |
407 | struct bgp_node *rn; | |
408 | struct bgp_nexthop_cache *bnc; | |
409 | ||
410 | for (rn = bgp_table_top (table); rn; rn = bgp_route_next (rn)) | |
411 | if ((bnc = rn->info) != NULL) | |
412 | { | |
413 | bnc_free (bnc); | |
414 | rn->info = NULL; | |
415 | bgp_unlock_node (rn); | |
416 | } | |
417 | } | |
418 | ||
419 | void | |
420 | bgp_scan_ipv4 () | |
421 | { | |
422 | struct bgp_node *rn; | |
423 | struct bgp *bgp; | |
424 | struct bgp_info *bi; | |
425 | struct bgp_info *next; | |
426 | struct peer *peer; | |
427 | struct listnode *nn; | |
428 | int valid; | |
429 | int current; | |
430 | int changed; | |
431 | int metricchanged; | |
432 | ||
433 | /* Change cache. */ | |
434 | if (bgp_nexthop_cache_ipv4 == cache1) | |
435 | bgp_nexthop_cache_ipv4 = cache2; | |
436 | else | |
437 | bgp_nexthop_cache_ipv4 = cache1; | |
438 | ||
439 | /* Get default bgp. */ | |
440 | bgp = bgp_get_default (); | |
441 | if (bgp == NULL) | |
442 | return; | |
443 | ||
444 | /* Maximum prefix check */ | |
445 | LIST_LOOP (bgp->peer, peer, nn) | |
446 | { | |
447 | if (peer->status != Established) | |
448 | continue; | |
449 | ||
450 | if (peer->afc[AFI_IP][SAFI_UNICAST]) | |
451 | bgp_maximum_prefix_overflow (peer, AFI_IP, SAFI_UNICAST); | |
452 | if (peer->afc[AFI_IP][SAFI_MULTICAST]) | |
453 | bgp_maximum_prefix_overflow (peer, AFI_IP, SAFI_MULTICAST); | |
454 | if (peer->afc[AFI_IP][SAFI_MPLS_VPN]) | |
455 | bgp_maximum_prefix_overflow (peer, AFI_IP, SAFI_MPLS_VPN); | |
456 | } | |
457 | ||
458 | for (rn = bgp_table_top (bgp->rib[AFI_IP][SAFI_UNICAST]); rn; | |
459 | rn = bgp_route_next (rn)) | |
460 | { | |
461 | for (bi = rn->info; bi; bi = next) | |
462 | { | |
463 | next = bi->next; | |
464 | ||
465 | if (bi->type == ZEBRA_ROUTE_BGP && bi->sub_type == BGP_ROUTE_NORMAL) | |
466 | { | |
467 | changed = 0; | |
468 | metricchanged = 0; | |
469 | ||
470 | if (peer_sort (bi->peer) == BGP_PEER_EBGP && bi->peer->ttl == 1) | |
471 | valid = bgp_nexthop_check_ebgp (AFI_IP, bi->attr); | |
472 | else | |
473 | valid = bgp_nexthop_lookup (AFI_IP, bi->peer, bi, | |
474 | &changed, &metricchanged); | |
475 | ||
476 | current = CHECK_FLAG (bi->flags, BGP_INFO_VALID) ? 1 : 0; | |
477 | ||
478 | if (changed) | |
479 | SET_FLAG (bi->flags, BGP_INFO_IGP_CHANGED); | |
480 | else | |
481 | UNSET_FLAG (bi->flags, BGP_INFO_IGP_CHANGED); | |
482 | ||
483 | if (valid != current) | |
484 | { | |
485 | if (CHECK_FLAG (bi->flags, BGP_INFO_VALID)) | |
486 | { | |
487 | bgp_aggregate_decrement (bgp, &rn->p, bi, | |
488 | AFI_IP, SAFI_UNICAST); | |
489 | UNSET_FLAG (bi->flags, BGP_INFO_VALID); | |
490 | } | |
491 | else | |
492 | { | |
493 | SET_FLAG (bi->flags, BGP_INFO_VALID); | |
494 | bgp_aggregate_increment (bgp, &rn->p, bi, | |
495 | AFI_IP, SAFI_UNICAST); | |
496 | } | |
497 | } | |
498 | ||
499 | if (CHECK_FLAG (bgp->af_flags[AFI_IP][SAFI_UNICAST], | |
500 | BGP_CONFIG_DAMPENING) | |
501 | && bi->damp_info ) | |
502 | if (bgp_damp_scan (bi, AFI_IP, SAFI_UNICAST)) | |
503 | bgp_aggregate_increment (bgp, &rn->p, bi, | |
504 | AFI_IP, SAFI_UNICAST); | |
505 | } | |
506 | } | |
507 | bgp_process (bgp, rn, AFI_IP, SAFI_UNICAST); | |
508 | } | |
509 | ||
510 | /* Flash old cache. */ | |
511 | if (bgp_nexthop_cache_ipv4 == cache1) | |
512 | bgp_nexthop_cache_reset (cache2); | |
513 | else | |
514 | bgp_nexthop_cache_reset (cache1); | |
515 | } | |
516 | ||
517 | #ifdef HAVE_IPV6 | |
518 | void | |
519 | bgp_scan_ipv6 () | |
520 | { | |
521 | struct bgp_node *rn; | |
522 | struct bgp *bgp; | |
523 | struct bgp_info *bi; | |
524 | struct bgp_info *next; | |
525 | struct peer *peer; | |
526 | struct listnode *nn; | |
527 | int valid; | |
528 | int current; | |
529 | int changed; | |
530 | int metricchanged; | |
531 | ||
532 | /* Change cache. */ | |
533 | if (bgp_nexthop_cache_ipv6 == cache6_1) | |
534 | bgp_nexthop_cache_ipv6 = cache6_2; | |
535 | else | |
536 | bgp_nexthop_cache_ipv6 = cache6_1; | |
537 | ||
538 | /* Get default bgp. */ | |
539 | bgp = bgp_get_default (); | |
540 | if (bgp == NULL) | |
541 | return; | |
542 | ||
543 | /* Maximum prefix check */ | |
544 | LIST_LOOP (bgp->peer, peer, nn) | |
545 | { | |
546 | if (peer->status != Established) | |
547 | continue; | |
548 | ||
549 | if (peer->afc[AFI_IP6][SAFI_UNICAST]) | |
550 | bgp_maximum_prefix_overflow (peer, AFI_IP6, SAFI_UNICAST); | |
551 | if (peer->afc[AFI_IP6][SAFI_MULTICAST]) | |
552 | bgp_maximum_prefix_overflow (peer, AFI_IP6, SAFI_MULTICAST); | |
553 | } | |
554 | ||
555 | for (rn = bgp_table_top (bgp->rib[AFI_IP6][SAFI_UNICAST]); rn; | |
556 | rn = bgp_route_next (rn)) | |
557 | { | |
558 | for (bi = rn->info; bi; bi = next) | |
559 | { | |
560 | next = bi->next; | |
561 | ||
562 | if (bi->type == ZEBRA_ROUTE_BGP && bi->sub_type == BGP_ROUTE_NORMAL) | |
563 | { | |
564 | changed = 0; | |
565 | metricchanged = 0; | |
566 | ||
567 | if (peer_sort (bi->peer) == BGP_PEER_EBGP && bi->peer->ttl == 1) | |
568 | valid = 1; | |
569 | else | |
570 | valid = bgp_nexthop_lookup_ipv6 (bi->peer, bi, | |
571 | &changed, &metricchanged); | |
572 | ||
573 | current = CHECK_FLAG (bi->flags, BGP_INFO_VALID) ? 1 : 0; | |
574 | ||
575 | if (changed) | |
576 | SET_FLAG (bi->flags, BGP_INFO_IGP_CHANGED); | |
577 | else | |
578 | UNSET_FLAG (bi->flags, BGP_INFO_IGP_CHANGED); | |
579 | ||
580 | if (valid != current) | |
581 | { | |
582 | if (CHECK_FLAG (bi->flags, BGP_INFO_VALID)) | |
583 | { | |
584 | bgp_aggregate_decrement (bgp, &rn->p, bi, | |
585 | AFI_IP6, SAFI_UNICAST); | |
586 | UNSET_FLAG (bi->flags, BGP_INFO_VALID); | |
587 | } | |
588 | else | |
589 | { | |
590 | SET_FLAG (bi->flags, BGP_INFO_VALID); | |
591 | bgp_aggregate_increment (bgp, &rn->p, bi, | |
592 | AFI_IP6, SAFI_UNICAST); | |
593 | } | |
594 | } | |
595 | ||
596 | if (CHECK_FLAG (bgp->af_flags[AFI_IP6][SAFI_UNICAST], | |
597 | BGP_CONFIG_DAMPENING) | |
598 | && bi->damp_info ) | |
599 | if (bgp_damp_scan (bi, AFI_IP6, SAFI_UNICAST)) | |
600 | bgp_aggregate_increment (bgp, &rn->p, bi, | |
601 | AFI_IP6, SAFI_UNICAST); | |
602 | } | |
603 | } | |
604 | bgp_process (bgp, rn, AFI_IP6, SAFI_UNICAST); | |
605 | } | |
606 | ||
607 | /* Flash old cache. */ | |
608 | if (bgp_nexthop_cache_ipv6 == cache6_1) | |
609 | bgp_nexthop_cache_reset (cache6_2); | |
610 | else | |
611 | bgp_nexthop_cache_reset (cache6_1); | |
612 | } | |
613 | #endif /* HAVE_IPV6 */ | |
614 | ||
615 | /* BGP scan thread. This thread check nexthop reachability. */ | |
616 | int | |
617 | bgp_scan (struct thread *t) | |
618 | { | |
619 | bgp_scan_thread = | |
620 | thread_add_timer (master, bgp_scan, NULL, bgp_scan_interval); | |
621 | ||
622 | if (BGP_DEBUG (normal, NORMAL)) | |
623 | zlog_info ("Performing BGP general scanning"); | |
624 | ||
625 | bgp_scan_ipv4 (); | |
626 | ||
627 | #ifdef HAVE_IPV6 | |
628 | bgp_scan_ipv6 (); | |
629 | #endif /* HAVE_IPV6 */ | |
630 | ||
631 | return 0; | |
632 | } | |
633 | \f | |
634 | struct bgp_connected | |
635 | { | |
636 | unsigned int refcnt; | |
637 | }; | |
638 | ||
639 | void | |
640 | bgp_connected_add (struct connected *ifc) | |
641 | { | |
642 | struct prefix p; | |
643 | struct prefix *addr; | |
644 | struct prefix *dest; | |
645 | struct interface *ifp; | |
646 | struct bgp_node *rn; | |
647 | struct bgp_connected *bc; | |
648 | ||
649 | ifp = ifc->ifp; | |
650 | ||
651 | if (! ifp) | |
652 | return; | |
653 | ||
654 | if (if_is_loopback (ifp)) | |
655 | return; | |
656 | ||
657 | addr = ifc->address; | |
658 | dest = ifc->destination; | |
659 | ||
660 | if (addr->family == AF_INET) | |
661 | { | |
662 | memset (&p, 0, sizeof (struct prefix)); | |
663 | p.family = AF_INET; | |
664 | p.prefixlen = addr->prefixlen; | |
665 | ||
00df0c1e | 666 | if (ifc_pointopoint (ifc)) |
718e3744 | 667 | p.u.prefix4 = dest->u.prefix4; |
668 | else | |
669 | p.u.prefix4 = addr->u.prefix4; | |
670 | ||
671 | apply_mask_ipv4 ((struct prefix_ipv4 *) &p); | |
672 | ||
673 | if (prefix_ipv4_any ((struct prefix_ipv4 *) &p)) | |
674 | return; | |
675 | ||
676 | rn = bgp_node_get (bgp_connected_ipv4, (struct prefix *) &p); | |
677 | if (rn->info) | |
678 | { | |
679 | bc = rn->info; | |
680 | bc->refcnt++; | |
681 | } | |
682 | else | |
683 | { | |
684 | bc = XMALLOC (0, sizeof (struct bgp_connected)); | |
685 | memset (bc, 0, sizeof (struct bgp_connected)); | |
686 | bc->refcnt = 1; | |
687 | rn->info = bc; | |
688 | } | |
689 | } | |
690 | #ifdef HAVE_IPV6 | |
691 | if (addr->family == AF_INET6) | |
692 | { | |
693 | memset (&p, 0, sizeof (struct prefix)); | |
694 | p.family = AF_INET6; | |
695 | p.prefixlen = addr->prefixlen; | |
696 | ||
00df0c1e | 697 | if (ifc_pointopoint (ifc)) |
718e3744 | 698 | p.u.prefix6 = dest->u.prefix6; |
699 | else | |
700 | p.u.prefix6 = addr->u.prefix6; | |
701 | ||
702 | apply_mask_ipv6 ((struct prefix_ipv6 *) &p); | |
703 | ||
704 | if (IN6_IS_ADDR_UNSPECIFIED (&p.u.prefix6)) | |
705 | return; | |
706 | ||
707 | if (IN6_IS_ADDR_LINKLOCAL (&p.u.prefix6)) | |
708 | return; | |
709 | ||
710 | rn = bgp_node_get (bgp_connected_ipv6, (struct prefix *) &p); | |
711 | if (rn->info) | |
712 | { | |
713 | bc = rn->info; | |
714 | bc->refcnt++; | |
715 | } | |
716 | else | |
717 | { | |
718 | bc = XMALLOC (0, sizeof (struct bgp_connected)); | |
719 | memset (bc, 0, sizeof (struct bgp_connected)); | |
720 | bc->refcnt = 1; | |
721 | rn->info = bc; | |
722 | } | |
723 | } | |
724 | #endif /* HAVE_IPV6 */ | |
725 | } | |
726 | ||
727 | void | |
728 | bgp_connected_delete (struct connected *ifc) | |
729 | { | |
730 | struct prefix p; | |
731 | struct prefix *addr; | |
732 | struct prefix *dest; | |
733 | struct interface *ifp; | |
734 | struct bgp_node *rn; | |
735 | struct bgp_connected *bc; | |
736 | ||
737 | ifp = ifc->ifp; | |
738 | ||
739 | if (if_is_loopback (ifp)) | |
740 | return; | |
741 | ||
742 | addr = ifc->address; | |
743 | dest = ifc->destination; | |
744 | ||
745 | if (addr->family == AF_INET) | |
746 | { | |
747 | memset (&p, 0, sizeof (struct prefix)); | |
748 | p.family = AF_INET; | |
749 | p.prefixlen = addr->prefixlen; | |
750 | ||
00df0c1e | 751 | if (ifc_pointopoint (ifc)) |
718e3744 | 752 | p.u.prefix4 = dest->u.prefix4; |
753 | else | |
754 | p.u.prefix4 = addr->u.prefix4; | |
755 | ||
756 | apply_mask_ipv4 ((struct prefix_ipv4 *) &p); | |
757 | ||
758 | if (prefix_ipv4_any ((struct prefix_ipv4 *) &p)) | |
759 | return; | |
760 | ||
761 | rn = bgp_node_lookup (bgp_connected_ipv4, &p); | |
762 | if (! rn) | |
763 | return; | |
764 | ||
765 | bc = rn->info; | |
766 | bc->refcnt--; | |
767 | if (bc->refcnt == 0) | |
768 | { | |
769 | XFREE (0, bc); | |
770 | rn->info = NULL; | |
771 | } | |
772 | bgp_unlock_node (rn); | |
773 | bgp_unlock_node (rn); | |
774 | } | |
775 | #ifdef HAVE_IPV6 | |
776 | else if (addr->family == AF_INET6) | |
777 | { | |
778 | memset (&p, 0, sizeof (struct prefix)); | |
779 | p.family = AF_INET6; | |
780 | p.prefixlen = addr->prefixlen; | |
781 | ||
00df0c1e | 782 | if (ifc_pointopoint (ifc)) |
718e3744 | 783 | p.u.prefix6 = dest->u.prefix6; |
784 | else | |
785 | p.u.prefix6 = addr->u.prefix6; | |
786 | ||
787 | apply_mask_ipv6 ((struct prefix_ipv6 *) &p); | |
788 | ||
789 | if (IN6_IS_ADDR_UNSPECIFIED (&p.u.prefix6)) | |
790 | return; | |
791 | ||
792 | if (IN6_IS_ADDR_LINKLOCAL (&p.u.prefix6)) | |
793 | return; | |
794 | ||
795 | rn = bgp_node_lookup (bgp_connected_ipv6, (struct prefix *) &p); | |
796 | if (! rn) | |
797 | return; | |
798 | ||
799 | bc = rn->info; | |
800 | bc->refcnt--; | |
801 | if (bc->refcnt == 0) | |
802 | { | |
803 | XFREE (0, bc); | |
804 | rn->info = NULL; | |
805 | } | |
806 | bgp_unlock_node (rn); | |
807 | bgp_unlock_node (rn); | |
808 | } | |
809 | #endif /* HAVE_IPV6 */ | |
810 | } | |
811 | ||
812 | int | |
813 | bgp_nexthop_self (afi_t afi, struct attr *attr) | |
814 | { | |
815 | listnode node; | |
816 | listnode node2; | |
817 | struct interface *ifp; | |
818 | struct connected *ifc; | |
819 | struct prefix *p; | |
820 | ||
821 | for (node = listhead (iflist); node; nextnode (node)) | |
822 | { | |
823 | ifp = getdata (node); | |
824 | ||
825 | for (node2 = listhead (ifp->connected); node2; nextnode (node2)) | |
826 | { | |
827 | ifc = getdata (node2); | |
828 | p = ifc->address; | |
829 | ||
830 | if (p && p->family == AF_INET | |
831 | && IPV4_ADDR_SAME (&p->u.prefix4, &attr->nexthop)) | |
832 | return 1; | |
833 | } | |
834 | } | |
835 | return 0; | |
836 | } | |
837 | \f | |
838 | struct bgp_nexthop_cache * | |
839 | zlookup_read () | |
840 | { | |
841 | struct stream *s; | |
842 | u_int16_t length; | |
843 | u_char command; | |
844 | int nbytes; | |
845 | struct in_addr raddr; | |
846 | u_int32_t metric; | |
847 | int i; | |
848 | u_char nexthop_num; | |
849 | struct nexthop *nexthop; | |
850 | struct bgp_nexthop_cache *bnc; | |
851 | ||
852 | s = zlookup->ibuf; | |
853 | stream_reset (s); | |
854 | ||
855 | nbytes = stream_read (s, zlookup->sock, 2); | |
856 | length = stream_getw (s); | |
857 | ||
858 | nbytes = stream_read (s, zlookup->sock, length - 2); | |
859 | command = stream_getc (s); | |
860 | raddr.s_addr = stream_get_ipv4 (s); | |
861 | metric = stream_getl (s); | |
862 | nexthop_num = stream_getc (s); | |
863 | ||
864 | if (nexthop_num) | |
865 | { | |
866 | bnc = bnc_new (); | |
867 | bnc->valid = 1; | |
868 | bnc->metric = metric; | |
869 | bnc->nexthop_num = nexthop_num; | |
870 | ||
871 | for (i = 0; i < nexthop_num; i++) | |
872 | { | |
873 | nexthop = XMALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); | |
874 | memset (nexthop, 0, sizeof (struct nexthop)); | |
875 | nexthop->type = stream_getc (s); | |
876 | switch (nexthop->type) | |
877 | { | |
878 | case ZEBRA_NEXTHOP_IPV4: | |
879 | nexthop->gate.ipv4.s_addr = stream_get_ipv4 (s); | |
880 | break; | |
881 | case ZEBRA_NEXTHOP_IFINDEX: | |
882 | case ZEBRA_NEXTHOP_IFNAME: | |
883 | nexthop->ifindex = stream_getl (s); | |
884 | break; | |
885 | } | |
886 | bnc_nexthop_add (bnc, nexthop); | |
887 | } | |
888 | } | |
889 | else | |
890 | return NULL; | |
891 | ||
892 | return bnc; | |
893 | } | |
894 | ||
895 | struct bgp_nexthop_cache * | |
896 | zlookup_query (struct in_addr addr) | |
897 | { | |
898 | int ret; | |
899 | struct stream *s; | |
900 | ||
901 | /* Check socket. */ | |
902 | if (zlookup->sock < 0) | |
903 | return NULL; | |
904 | ||
905 | s = zlookup->obuf; | |
906 | stream_reset (s); | |
907 | stream_putw (s, 7); | |
908 | stream_putc (s, ZEBRA_IPV4_NEXTHOP_LOOKUP); | |
909 | stream_put_in_addr (s, &addr); | |
910 | ||
911 | ret = writen (zlookup->sock, s->data, 7); | |
912 | if (ret < 0) | |
913 | { | |
914 | zlog_err ("can't write to zlookup->sock"); | |
915 | close (zlookup->sock); | |
916 | zlookup->sock = -1; | |
917 | return NULL; | |
918 | } | |
919 | if (ret == 0) | |
920 | { | |
921 | zlog_err ("zlookup->sock connection closed"); | |
922 | close (zlookup->sock); | |
923 | zlookup->sock = -1; | |
924 | return NULL; | |
925 | } | |
926 | ||
927 | return zlookup_read (); | |
928 | } | |
929 | ||
930 | #ifdef HAVE_IPV6 | |
931 | struct bgp_nexthop_cache * | |
932 | zlookup_read_ipv6 () | |
933 | { | |
934 | struct stream *s; | |
935 | u_int16_t length; | |
936 | u_char command; | |
937 | int nbytes; | |
938 | struct in6_addr raddr; | |
939 | u_int32_t metric; | |
940 | int i; | |
941 | u_char nexthop_num; | |
942 | struct nexthop *nexthop; | |
943 | struct bgp_nexthop_cache *bnc; | |
944 | ||
945 | s = zlookup->ibuf; | |
946 | stream_reset (s); | |
947 | ||
948 | nbytes = stream_read (s, zlookup->sock, 2); | |
949 | length = stream_getw (s); | |
950 | ||
951 | nbytes = stream_read (s, zlookup->sock, length - 2); | |
952 | command = stream_getc (s); | |
953 | ||
954 | stream_get (&raddr, s, 16); | |
955 | ||
956 | metric = stream_getl (s); | |
957 | nexthop_num = stream_getc (s); | |
958 | ||
959 | if (nexthop_num) | |
960 | { | |
961 | bnc = bnc_new (); | |
962 | bnc->valid = 1; | |
963 | bnc->metric = metric; | |
964 | bnc->nexthop_num = nexthop_num; | |
965 | ||
966 | for (i = 0; i < nexthop_num; i++) | |
967 | { | |
968 | nexthop = XMALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); | |
969 | memset (nexthop, 0, sizeof (struct nexthop)); | |
970 | nexthop->type = stream_getc (s); | |
971 | switch (nexthop->type) | |
972 | { | |
973 | case ZEBRA_NEXTHOP_IPV6: | |
974 | stream_get (&nexthop->gate.ipv6, s, 16); | |
975 | break; | |
976 | case ZEBRA_NEXTHOP_IPV6_IFINDEX: | |
977 | case ZEBRA_NEXTHOP_IPV6_IFNAME: | |
978 | stream_get (&nexthop->gate.ipv6, s, 16); | |
979 | nexthop->ifindex = stream_getl (s); | |
980 | break; | |
981 | case ZEBRA_NEXTHOP_IFINDEX: | |
982 | case ZEBRA_NEXTHOP_IFNAME: | |
983 | nexthop->ifindex = stream_getl (s); | |
984 | break; | |
985 | } | |
986 | bnc_nexthop_add (bnc, nexthop); | |
987 | } | |
988 | } | |
989 | else | |
990 | return NULL; | |
991 | ||
992 | return bnc; | |
993 | } | |
994 | ||
995 | struct bgp_nexthop_cache * | |
996 | zlookup_query_ipv6 (struct in6_addr *addr) | |
997 | { | |
998 | int ret; | |
999 | struct stream *s; | |
1000 | ||
1001 | /* Check socket. */ | |
1002 | if (zlookup->sock < 0) | |
1003 | return NULL; | |
1004 | ||
1005 | s = zlookup->obuf; | |
1006 | stream_reset (s); | |
1007 | stream_putw (s, 19); | |
1008 | stream_putc (s, ZEBRA_IPV6_NEXTHOP_LOOKUP); | |
1009 | stream_put (s, addr, 16); | |
1010 | ||
1011 | ret = writen (zlookup->sock, s->data, 19); | |
1012 | if (ret < 0) | |
1013 | { | |
1014 | zlog_err ("can't write to zlookup->sock"); | |
1015 | close (zlookup->sock); | |
1016 | zlookup->sock = -1; | |
1017 | return NULL; | |
1018 | } | |
1019 | if (ret == 0) | |
1020 | { | |
1021 | zlog_err ("zlookup->sock connection closed"); | |
1022 | close (zlookup->sock); | |
1023 | zlookup->sock = -1; | |
1024 | return NULL; | |
1025 | } | |
1026 | ||
1027 | return zlookup_read_ipv6 (); | |
1028 | } | |
1029 | #endif /* HAVE_IPV6 */ | |
1030 | ||
1031 | int | |
1032 | bgp_import_check (struct prefix *p, u_int32_t *igpmetric, struct in_addr *igpnexthop) | |
1033 | { | |
1034 | struct stream *s; | |
1035 | int ret; | |
1036 | u_int16_t length; | |
1037 | u_char command; | |
1038 | int nbytes; | |
1039 | struct in_addr addr; | |
1040 | struct in_addr nexthop; | |
1041 | u_int32_t metric = 0; | |
1042 | u_char nexthop_num; | |
1043 | u_char nexthop_type; | |
1044 | ||
1045 | /* If lookup connection is not available return valid. */ | |
1046 | if (zlookup->sock < 0) | |
1047 | { | |
1048 | if (igpmetric) | |
1049 | *igpmetric = 0; | |
1050 | return 1; | |
1051 | } | |
1052 | ||
1053 | /* Send query to the lookup connection */ | |
1054 | s = zlookup->obuf; | |
1055 | stream_reset (s); | |
1056 | stream_putw (s, 8); | |
1057 | stream_putc (s, ZEBRA_IPV4_IMPORT_LOOKUP); | |
1058 | stream_putc (s, p->prefixlen); | |
1059 | stream_put_in_addr (s, &p->u.prefix4); | |
1060 | ||
1061 | /* Write the packet. */ | |
1062 | ret = writen (zlookup->sock, s->data, 8); | |
1063 | ||
1064 | if (ret < 0) | |
1065 | { | |
1066 | zlog_err ("can't write to zlookup->sock"); | |
1067 | close (zlookup->sock); | |
1068 | zlookup->sock = -1; | |
1069 | return 1; | |
1070 | } | |
1071 | if (ret == 0) | |
1072 | { | |
1073 | zlog_err ("zlookup->sock connection closed"); | |
1074 | close (zlookup->sock); | |
1075 | zlookup->sock = -1; | |
1076 | return 1; | |
1077 | } | |
1078 | ||
1079 | /* Get result. */ | |
1080 | stream_reset (s); | |
1081 | ||
1082 | /* Fetch length. */ | |
1083 | nbytes = stream_read (s, zlookup->sock, 2); | |
1084 | length = stream_getw (s); | |
1085 | ||
1086 | /* Fetch whole data. */ | |
1087 | nbytes = stream_read (s, zlookup->sock, length - 2); | |
1088 | command = stream_getc (s); | |
1089 | addr.s_addr = stream_get_ipv4 (s); | |
1090 | metric = stream_getl (s); | |
1091 | nexthop_num = stream_getc (s); | |
1092 | ||
1093 | /* Set IGP metric value. */ | |
1094 | if (igpmetric) | |
1095 | *igpmetric = metric; | |
1096 | ||
1097 | /* If there is nexthop then this is active route. */ | |
1098 | if (nexthop_num) | |
1099 | { | |
1100 | nexthop.s_addr = 0; | |
1101 | nexthop_type = stream_getc (s); | |
1102 | if (nexthop_type == ZEBRA_NEXTHOP_IPV4) | |
1103 | { | |
1104 | nexthop.s_addr = stream_get_ipv4 (s); | |
1105 | if (igpnexthop) | |
1106 | *igpnexthop = nexthop; | |
1107 | } | |
1108 | else | |
1109 | *igpnexthop = nexthop; | |
1110 | ||
1111 | return 1; | |
1112 | } | |
1113 | else | |
1114 | return 0; | |
1115 | } | |
1116 | ||
1117 | /* Scan all configured BGP route then check the route exists in IGP or | |
1118 | not. */ | |
1119 | int | |
1120 | bgp_import (struct thread *t) | |
1121 | { | |
1122 | struct bgp *bgp; | |
1123 | struct bgp_node *rn; | |
1124 | struct bgp_static *bgp_static; | |
1125 | int valid; | |
1126 | u_int32_t metric; | |
1127 | struct in_addr nexthop; | |
1128 | afi_t afi; | |
1129 | safi_t safi; | |
1130 | ||
1131 | bgp_import_thread = | |
1132 | thread_add_timer (master, bgp_import, NULL, bgp_import_interval); | |
1133 | ||
1134 | bgp = bgp_get_default (); | |
1135 | if (! bgp) | |
1136 | return 0; | |
1137 | ||
1138 | for (afi = AFI_IP; afi < AFI_MAX; afi++) | |
1139 | for (safi = SAFI_UNICAST; safi < SAFI_MPLS_VPN; safi++) | |
1140 | for (rn = bgp_table_top (bgp->route[afi][safi]); rn; | |
1141 | rn = bgp_route_next (rn)) | |
1142 | if ((bgp_static = rn->info) != NULL) | |
1143 | { | |
1144 | if (bgp_static->backdoor) | |
1145 | continue; | |
1146 | ||
1147 | valid = bgp_static->valid; | |
1148 | metric = bgp_static->igpmetric; | |
1149 | nexthop = bgp_static->igpnexthop; | |
1150 | ||
1151 | if (bgp_flag_check (bgp, BGP_FLAG_IMPORT_CHECK) | |
1152 | && afi == AFI_IP && safi == SAFI_UNICAST) | |
1153 | bgp_static->valid = bgp_import_check (&rn->p, &bgp_static->igpmetric, | |
1154 | &bgp_static->igpnexthop); | |
1155 | else | |
1156 | { | |
1157 | bgp_static->valid = 1; | |
1158 | bgp_static->igpmetric = 0; | |
1159 | bgp_static->igpnexthop.s_addr = 0; | |
1160 | } | |
1161 | ||
1162 | if (bgp_static->valid != valid) | |
1163 | { | |
1164 | if (bgp_static->valid) | |
1165 | bgp_static_update (bgp, &rn->p, bgp_static, afi, safi); | |
1166 | else | |
1167 | bgp_static_withdraw (bgp, &rn->p, afi, safi); | |
1168 | } | |
1169 | else if (bgp_static->valid) | |
1170 | { | |
1171 | if (bgp_static->igpmetric != metric | |
1172 | || bgp_static->igpnexthop.s_addr != nexthop.s_addr | |
1173 | || bgp_static->rmap.name) | |
1174 | bgp_static_update (bgp, &rn->p, bgp_static, afi, safi); | |
1175 | } | |
1176 | } | |
1177 | return 0; | |
1178 | } | |
1179 | ||
1180 | /* Connect to zebra for nexthop lookup. */ | |
1181 | int | |
1182 | zlookup_connect (struct thread *t) | |
1183 | { | |
1184 | struct zclient *zlookup; | |
1185 | ||
1186 | zlookup = THREAD_ARG (t); | |
1187 | zlookup->t_connect = NULL; | |
1188 | ||
1189 | if (zlookup->sock != -1) | |
1190 | return 0; | |
1191 | ||
1192 | #ifdef HAVE_TCP_ZEBRA | |
1193 | zlookup->sock = zclient_socket (); | |
1194 | #else | |
1195 | zlookup->sock = zclient_socket_un (ZEBRA_SERV_PATH); | |
1196 | #endif /* HAVE_TCP_ZEBRA */ | |
1197 | if (zlookup->sock < 0) | |
1198 | return -1; | |
1199 | ||
1200 | /* Make BGP import there. */ | |
1201 | bgp_import_thread = | |
1202 | thread_add_timer (master, bgp_import, NULL, 0); | |
1203 | ||
1204 | return 0; | |
1205 | } | |
1206 | ||
1207 | /* Check specified multiaccess next-hop. */ | |
1208 | int | |
1209 | bgp_multiaccess_check_v4 (struct in_addr nexthop, char *peer) | |
1210 | { | |
1211 | struct bgp_node *rn1; | |
1212 | struct bgp_node *rn2; | |
1213 | struct prefix p1; | |
1214 | struct prefix p2; | |
1215 | struct in_addr addr; | |
1216 | int ret; | |
1217 | ||
1218 | ret = inet_aton (peer, &addr); | |
1219 | if (! ret) | |
1220 | return 0; | |
1221 | ||
1222 | memset (&p1, 0, sizeof (struct prefix)); | |
1223 | p1.family = AF_INET; | |
1224 | p1.prefixlen = IPV4_MAX_BITLEN; | |
1225 | p1.u.prefix4 = nexthop; | |
1226 | memset (&p2, 0, sizeof (struct prefix)); | |
1227 | p2.family = AF_INET; | |
1228 | p2.prefixlen = IPV4_MAX_BITLEN; | |
1229 | p2.u.prefix4 = addr; | |
1230 | ||
1231 | /* If bgp scan is not enabled, return invalid. */ | |
1232 | if (zlookup->sock < 0) | |
1233 | return 0; | |
1234 | ||
1235 | rn1 = bgp_node_match (bgp_connected_ipv4, &p1); | |
1236 | if (! rn1) | |
1237 | return 0; | |
1238 | ||
1239 | rn2 = bgp_node_match (bgp_connected_ipv4, &p2); | |
1240 | if (! rn2) | |
1241 | return 0; | |
1242 | ||
1243 | if (rn1 == rn2) | |
1244 | return 1; | |
1245 | ||
1246 | return 0; | |
1247 | } | |
1248 | \f | |
1249 | DEFUN (bgp_scan_time, | |
1250 | bgp_scan_time_cmd, | |
1251 | "bgp scan-time <5-60>", | |
1252 | "BGP specific commands\n" | |
1253 | "Configure background scanner interval\n" | |
1254 | "Scanner interval (seconds)\n") | |
1255 | { | |
1256 | bgp_scan_interval = atoi (argv[0]); | |
1257 | ||
1258 | if (bgp_scan_thread) | |
1259 | { | |
1260 | thread_cancel (bgp_scan_thread); | |
1261 | bgp_scan_thread = | |
1262 | thread_add_timer (master, bgp_scan, NULL, bgp_scan_interval); | |
1263 | } | |
1264 | ||
1265 | return CMD_SUCCESS; | |
1266 | } | |
1267 | ||
1268 | DEFUN (no_bgp_scan_time, | |
1269 | no_bgp_scan_time_cmd, | |
1270 | "no bgp scan-time", | |
1271 | NO_STR | |
1272 | "BGP specific commands\n" | |
1273 | "Configure background scanner interval\n") | |
1274 | { | |
1275 | bgp_scan_interval = BGP_SCAN_INTERVAL_DEFAULT; | |
1276 | ||
1277 | if (bgp_scan_thread) | |
1278 | { | |
1279 | thread_cancel (bgp_scan_thread); | |
1280 | bgp_scan_thread = | |
1281 | thread_add_timer (master, bgp_scan, NULL, bgp_scan_interval); | |
1282 | } | |
1283 | ||
1284 | return CMD_SUCCESS; | |
1285 | } | |
1286 | ||
1287 | ALIAS (no_bgp_scan_time, | |
1288 | no_bgp_scan_time_val_cmd, | |
1289 | "no bgp scan-time <5-60>", | |
1290 | NO_STR | |
1291 | "BGP specific commands\n" | |
1292 | "Configure background scanner interval\n" | |
1293 | "Scanner interval (seconds)\n") | |
1294 | ||
1295 | DEFUN (show_ip_bgp_scan, | |
1296 | show_ip_bgp_scan_cmd, | |
1297 | "show ip bgp scan", | |
1298 | SHOW_STR | |
1299 | IP_STR | |
1300 | BGP_STR | |
1301 | "BGP scan status\n") | |
1302 | { | |
1303 | struct bgp_node *rn; | |
1304 | struct bgp_nexthop_cache *bnc; | |
1305 | ||
1306 | if (bgp_scan_thread) | |
1307 | vty_out (vty, "BGP scan is running%s", VTY_NEWLINE); | |
1308 | else | |
1309 | vty_out (vty, "BGP scan is not running%s", VTY_NEWLINE); | |
1310 | vty_out (vty, "BGP scan interval is %d%s", bgp_scan_interval, VTY_NEWLINE); | |
1311 | ||
1312 | vty_out (vty, "Current BGP nexthop cache:%s", VTY_NEWLINE); | |
1313 | for (rn = bgp_table_top (bgp_nexthop_cache_ipv4); rn; rn = bgp_route_next (rn)) | |
1314 | if ((bnc = rn->info) != NULL) | |
1315 | { | |
1316 | if (bnc->valid) | |
1317 | vty_out (vty, " %s valid [IGP metric %d]%s", | |
1318 | inet_ntoa (rn->p.u.prefix4), bnc->metric, VTY_NEWLINE); | |
1319 | else | |
1320 | vty_out (vty, " %s invalid%s", | |
1321 | inet_ntoa (rn->p.u.prefix4), VTY_NEWLINE); | |
1322 | } | |
1323 | ||
1324 | #ifdef HAVE_IPV6 | |
1325 | { | |
1326 | char buf[BUFSIZ]; | |
1327 | for (rn = bgp_table_top (bgp_nexthop_cache_ipv6); rn; rn = bgp_route_next (rn)) | |
1328 | if ((bnc = rn->info) != NULL) | |
1329 | { | |
1330 | if (bnc->valid) | |
1331 | vty_out (vty, " %s valid [IGP metric %d]%s", | |
1332 | inet_ntop (AF_INET6, &rn->p.u.prefix6, buf, BUFSIZ), | |
1333 | bnc->metric, VTY_NEWLINE); | |
1334 | else | |
1335 | vty_out (vty, " %s invalid%s", | |
1336 | inet_ntop (AF_INET6, &rn->p.u.prefix6, buf, BUFSIZ), | |
1337 | VTY_NEWLINE); | |
1338 | } | |
1339 | } | |
1340 | #endif /* HAVE_IPV6 */ | |
1341 | ||
1342 | vty_out (vty, "BGP connected route:%s", VTY_NEWLINE); | |
1343 | for (rn = bgp_table_top (bgp_connected_ipv4); rn; rn = bgp_route_next (rn)) | |
1344 | if (rn->info != NULL) | |
1345 | vty_out (vty, " %s/%d%s", inet_ntoa (rn->p.u.prefix4), rn->p.prefixlen, | |
1346 | VTY_NEWLINE); | |
1347 | ||
1348 | #ifdef HAVE_IPV6 | |
1349 | { | |
1350 | char buf[BUFSIZ]; | |
1351 | ||
1352 | for (rn = bgp_table_top (bgp_connected_ipv6); rn; rn = bgp_route_next (rn)) | |
1353 | if (rn->info != NULL) | |
1354 | vty_out (vty, " %s/%d%s", | |
1355 | inet_ntop (AF_INET6, &rn->p.u.prefix6, buf, BUFSIZ), | |
1356 | rn->p.prefixlen, | |
1357 | VTY_NEWLINE); | |
1358 | } | |
1359 | #endif /* HAVE_IPV6 */ | |
1360 | ||
1361 | return CMD_SUCCESS; | |
1362 | } | |
1363 | ||
1364 | int | |
1365 | bgp_config_write_scan_time (struct vty *vty) | |
1366 | { | |
1367 | if (bgp_scan_interval != BGP_SCAN_INTERVAL_DEFAULT) | |
1368 | vty_out (vty, " bgp scan-time %d%s", bgp_scan_interval, VTY_NEWLINE); | |
1369 | return CMD_SUCCESS; | |
1370 | } | |
1371 | ||
1372 | void | |
1373 | bgp_scan_init () | |
1374 | { | |
1375 | zlookup = zclient_new (); | |
1376 | zlookup->sock = -1; | |
1377 | zlookup->ibuf = stream_new (ZEBRA_MAX_PACKET_SIZ); | |
1378 | zlookup->obuf = stream_new (ZEBRA_MAX_PACKET_SIZ); | |
1379 | zlookup->t_connect = thread_add_event (master, zlookup_connect, zlookup, 0); | |
1380 | ||
1381 | bgp_scan_interval = BGP_SCAN_INTERVAL_DEFAULT; | |
1382 | bgp_import_interval = BGP_IMPORT_INTERVAL_DEFAULT; | |
1383 | ||
1384 | cache1 = bgp_table_init (); | |
1385 | cache2 = bgp_table_init (); | |
1386 | bgp_nexthop_cache_ipv4 = cache1; | |
1387 | ||
1388 | bgp_connected_ipv4 = bgp_table_init (); | |
1389 | ||
1390 | #ifdef HAVE_IPV6 | |
1391 | cache6_1 = bgp_table_init (); | |
1392 | cache6_2 = bgp_table_init (); | |
1393 | bgp_nexthop_cache_ipv6 = cache6_1; | |
1394 | bgp_connected_ipv6 = bgp_table_init (); | |
1395 | #endif /* HAVE_IPV6 */ | |
1396 | ||
1397 | /* Make BGP scan thread. */ | |
1398 | bgp_scan_thread = thread_add_timer (master, bgp_scan, NULL, bgp_scan_interval); | |
1399 | ||
1400 | install_element (BGP_NODE, &bgp_scan_time_cmd); | |
1401 | install_element (BGP_NODE, &no_bgp_scan_time_cmd); | |
1402 | install_element (BGP_NODE, &no_bgp_scan_time_val_cmd); | |
1403 | install_element (VIEW_NODE, &show_ip_bgp_scan_cmd); | |
1404 | install_element (ENABLE_NODE, &show_ip_bgp_scan_cmd); | |
1405 | } |