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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" | |
10f9bf3f JBD |
31 | #include "hash.h" |
32 | #include "jhash.h" | |
718e3744 | 33 | |
34 | #include "bgpd/bgpd.h" | |
35 | #include "bgpd/bgp_table.h" | |
36 | #include "bgpd/bgp_route.h" | |
37 | #include "bgpd/bgp_attr.h" | |
38 | #include "bgpd/bgp_nexthop.h" | |
39 | #include "bgpd/bgp_debug.h" | |
40 | #include "bgpd/bgp_damp.h" | |
41 | #include "zebra/rib.h" | |
42 | #include "zebra/zserv.h" /* For ZEBRA_SERV_PATH. */ | |
43 | ||
44 | struct bgp_nexthop_cache *zlookup_query (struct in_addr); | |
45 | #ifdef HAVE_IPV6 | |
46 | struct bgp_nexthop_cache *zlookup_query_ipv6 (struct in6_addr *); | |
47 | #endif /* HAVE_IPV6 */ | |
48 | \f | |
49 | /* Only one BGP scan thread are activated at the same time. */ | |
00d252cb | 50 | static struct thread *bgp_scan_thread = NULL; |
718e3744 | 51 | |
52 | /* BGP import thread */ | |
00d252cb | 53 | static struct thread *bgp_import_thread = NULL; |
718e3744 | 54 | |
55 | /* BGP scan interval. */ | |
00d252cb | 56 | static int bgp_scan_interval; |
718e3744 | 57 | |
58 | /* BGP import interval. */ | |
00d252cb | 59 | static int bgp_import_interval; |
718e3744 | 60 | |
61 | /* Route table for next-hop lookup cache. */ | |
00d252cb | 62 | static struct bgp_table *bgp_nexthop_cache_table[AFI_MAX]; |
63 | static struct bgp_table *cache1_table[AFI_MAX]; | |
64 | static struct bgp_table *cache2_table[AFI_MAX]; | |
718e3744 | 65 | |
66 | /* Route table for connected route. */ | |
00d252cb | 67 | static struct bgp_table *bgp_connected_table[AFI_MAX]; |
718e3744 | 68 | |
69 | /* BGP nexthop lookup query client. */ | |
228da428 | 70 | struct zclient *zlookup = NULL; |
718e3744 | 71 | \f |
72 | /* Add nexthop to the end of the list. */ | |
94f2b392 | 73 | static void |
718e3744 | 74 | bnc_nexthop_add (struct bgp_nexthop_cache *bnc, struct nexthop *nexthop) |
75 | { | |
76 | struct nexthop *last; | |
77 | ||
78 | for (last = bnc->nexthop; last && last->next; last = last->next) | |
79 | ; | |
80 | if (last) | |
81 | last->next = nexthop; | |
82 | else | |
83 | bnc->nexthop = nexthop; | |
84 | nexthop->prev = last; | |
85 | } | |
86 | ||
94f2b392 | 87 | static void |
718e3744 | 88 | bnc_nexthop_free (struct bgp_nexthop_cache *bnc) |
89 | { | |
90 | struct nexthop *nexthop; | |
91 | struct nexthop *next = NULL; | |
92 | ||
93 | for (nexthop = bnc->nexthop; nexthop; nexthop = next) | |
94 | { | |
95 | next = nexthop->next; | |
96 | XFREE (MTYPE_NEXTHOP, nexthop); | |
97 | } | |
98 | } | |
99 | ||
94f2b392 | 100 | static struct bgp_nexthop_cache * |
66e5cd87 | 101 | bnc_new (void) |
718e3744 | 102 | { |
393deb9b | 103 | return XCALLOC (MTYPE_BGP_NEXTHOP_CACHE, sizeof (struct bgp_nexthop_cache)); |
718e3744 | 104 | } |
105 | ||
94f2b392 | 106 | static void |
718e3744 | 107 | bnc_free (struct bgp_nexthop_cache *bnc) |
108 | { | |
109 | bnc_nexthop_free (bnc); | |
110 | XFREE (MTYPE_BGP_NEXTHOP_CACHE, bnc); | |
111 | } | |
112 | \f | |
94f2b392 | 113 | static int |
718e3744 | 114 | bgp_nexthop_same (struct nexthop *next1, struct nexthop *next2) |
115 | { | |
116 | if (next1->type != next2->type) | |
117 | return 0; | |
118 | ||
119 | switch (next1->type) | |
120 | { | |
121 | case ZEBRA_NEXTHOP_IPV4: | |
122 | if (! IPV4_ADDR_SAME (&next1->gate.ipv4, &next2->gate.ipv4)) | |
123 | return 0; | |
124 | break; | |
125 | case ZEBRA_NEXTHOP_IFINDEX: | |
126 | case ZEBRA_NEXTHOP_IFNAME: | |
127 | if (next1->ifindex != next2->ifindex) | |
128 | return 0; | |
129 | break; | |
130 | #ifdef HAVE_IPV6 | |
131 | case ZEBRA_NEXTHOP_IPV6: | |
132 | if (! IPV6_ADDR_SAME (&next1->gate.ipv6, &next2->gate.ipv6)) | |
133 | return 0; | |
134 | break; | |
135 | case ZEBRA_NEXTHOP_IPV6_IFINDEX: | |
136 | case ZEBRA_NEXTHOP_IPV6_IFNAME: | |
137 | if (! IPV6_ADDR_SAME (&next1->gate.ipv6, &next2->gate.ipv6)) | |
138 | return 0; | |
139 | if (next1->ifindex != next2->ifindex) | |
140 | return 0; | |
141 | break; | |
142 | #endif /* HAVE_IPV6 */ | |
fa2b17e3 | 143 | default: |
144 | /* do nothing */ | |
145 | break; | |
718e3744 | 146 | } |
147 | return 1; | |
148 | } | |
149 | ||
94f2b392 | 150 | static int |
8e80bdf2 | 151 | bgp_nexthop_cache_different (struct bgp_nexthop_cache *bnc1, |
718e3744 | 152 | struct bgp_nexthop_cache *bnc2) |
153 | { | |
154 | int i; | |
155 | struct nexthop *next1, *next2; | |
156 | ||
157 | if (bnc1->nexthop_num != bnc2->nexthop_num) | |
158 | return 1; | |
159 | ||
160 | next1 = bnc1->nexthop; | |
161 | next2 = bnc2->nexthop; | |
162 | ||
163 | for (i = 0; i < bnc1->nexthop_num; i++) | |
164 | { | |
165 | if (! bgp_nexthop_same (next1, next2)) | |
166 | return 1; | |
167 | ||
168 | next1 = next1->next; | |
169 | next2 = next2->next; | |
170 | } | |
171 | return 0; | |
172 | } | |
173 | ||
174 | /* If nexthop exists on connected network return 1. */ | |
175 | int | |
8e80bdf2 | 176 | bgp_nexthop_onlink (afi_t afi, struct attr *attr) |
718e3744 | 177 | { |
178 | struct bgp_node *rn; | |
fc98d16e PJ |
179 | |
180 | /* If zebra is not enabled return */ | |
181 | if (zlookup->sock < 0) | |
182 | return 1; | |
183 | ||
718e3744 | 184 | /* Lookup the address is onlink or not. */ |
185 | if (afi == AFI_IP) | |
186 | { | |
5932020b | 187 | rn = bgp_node_match_ipv4 (bgp_connected_table[AFI_IP], &attr->nexthop); |
718e3744 | 188 | if (rn) |
189 | { | |
190 | bgp_unlock_node (rn); | |
191 | return 1; | |
192 | } | |
193 | } | |
194 | #ifdef HAVE_IPV6 | |
195 | else if (afi == AFI_IP6) | |
196 | { | |
fb982c25 | 197 | if (attr->extra->mp_nexthop_len == 32) |
718e3744 | 198 | return 1; |
fb982c25 | 199 | else if (attr->extra->mp_nexthop_len == 16) |
718e3744 | 200 | { |
fb982c25 | 201 | if (IN6_IS_ADDR_LINKLOCAL (&attr->extra->mp_nexthop_global)) |
718e3744 | 202 | return 1; |
203 | ||
5932020b | 204 | rn = bgp_node_match_ipv6 (bgp_connected_table[AFI_IP6], |
fb982c25 | 205 | &attr->extra->mp_nexthop_global); |
718e3744 | 206 | if (rn) |
207 | { | |
208 | bgp_unlock_node (rn); | |
209 | return 1; | |
210 | } | |
211 | } | |
212 | } | |
213 | #endif /* HAVE_IPV6 */ | |
214 | return 0; | |
215 | } | |
216 | ||
217 | #ifdef HAVE_IPV6 | |
218 | /* Check specified next-hop is reachable or not. */ | |
94f2b392 | 219 | static int |
718e3744 | 220 | bgp_nexthop_lookup_ipv6 (struct peer *peer, struct bgp_info *ri, int *changed, |
221 | int *metricchanged) | |
222 | { | |
223 | struct bgp_node *rn; | |
224 | struct prefix p; | |
225 | struct bgp_nexthop_cache *bnc; | |
226 | struct attr *attr; | |
fc98d16e PJ |
227 | |
228 | /* If lookup is not enabled, return valid. */ | |
229 | if (zlookup->sock < 0) | |
230 | { | |
231 | if (ri->extra) | |
232 | ri->extra->igpmetric = 0; | |
233 | return 1; | |
234 | } | |
235 | ||
718e3744 | 236 | /* Only check IPv6 global address only nexthop. */ |
237 | attr = ri->attr; | |
238 | ||
fb982c25 PJ |
239 | if (attr->extra->mp_nexthop_len != 16 |
240 | || IN6_IS_ADDR_LINKLOCAL (&attr->extra->mp_nexthop_global)) | |
718e3744 | 241 | return 1; |
242 | ||
243 | memset (&p, 0, sizeof (struct prefix)); | |
244 | p.family = AF_INET6; | |
245 | p.prefixlen = IPV6_MAX_BITLEN; | |
fb982c25 | 246 | p.u.prefix6 = attr->extra->mp_nexthop_global; |
718e3744 | 247 | |
248 | /* IBGP or ebgp-multihop */ | |
5932020b | 249 | rn = bgp_node_get (bgp_nexthop_cache_table[AFI_IP6], &p); |
718e3744 | 250 | |
251 | if (rn->info) | |
252 | { | |
253 | bnc = rn->info; | |
254 | bgp_unlock_node (rn); | |
255 | } | |
256 | else | |
257 | { | |
b64bfc1c DO |
258 | if (NULL == (bnc = zlookup_query_ipv6 (&attr->extra->mp_nexthop_global))) |
259 | bnc = bnc_new (); | |
260 | else | |
718e3744 | 261 | { |
718e3744 | 262 | if (changed) |
263 | { | |
8e80bdf2 DO |
264 | struct bgp_table *old; |
265 | struct bgp_node *oldrn; | |
266 | ||
5932020b | 267 | if (bgp_nexthop_cache_table[AFI_IP6] == cache1_table[AFI_IP6]) |
268 | old = cache2_table[AFI_IP6]; | |
718e3744 | 269 | else |
5932020b | 270 | old = cache1_table[AFI_IP6]; |
718e3744 | 271 | |
272 | oldrn = bgp_node_lookup (old, &p); | |
273 | if (oldrn) | |
274 | { | |
8e80bdf2 | 275 | struct bgp_nexthop_cache *oldbnc = oldrn->info; |
718e3744 | 276 | |
8e80bdf2 | 277 | bnc->changed = bgp_nexthop_cache_different (bnc, oldbnc); |
718e3744 | 278 | |
279 | if (bnc->metric != oldbnc->metric) | |
280 | bnc->metricchanged = 1; | |
6c88b44d CC |
281 | |
282 | bgp_unlock_node (oldrn); | |
718e3744 | 283 | } |
284 | } | |
285 | } | |
718e3744 | 286 | rn->info = bnc; |
287 | } | |
288 | ||
289 | if (changed) | |
290 | *changed = bnc->changed; | |
291 | ||
292 | if (metricchanged) | |
293 | *metricchanged = bnc->metricchanged; | |
294 | ||
fb982c25 PJ |
295 | if (bnc->valid && bnc->metric) |
296 | (bgp_info_extra_get (ri))->igpmetric = bnc->metric; | |
297 | else if (ri->extra) | |
298 | ri->extra->igpmetric = 0; | |
718e3744 | 299 | |
300 | return bnc->valid; | |
301 | } | |
302 | #endif /* HAVE_IPV6 */ | |
303 | ||
304 | /* Check specified next-hop is reachable or not. */ | |
305 | int | |
306 | bgp_nexthop_lookup (afi_t afi, struct peer *peer, struct bgp_info *ri, | |
307 | int *changed, int *metricchanged) | |
308 | { | |
309 | struct bgp_node *rn; | |
310 | struct prefix p; | |
311 | struct bgp_nexthop_cache *bnc; | |
312 | struct in_addr addr; | |
fc98d16e PJ |
313 | |
314 | /* If lookup is not enabled, return valid. */ | |
315 | if (zlookup->sock < 0) | |
316 | { | |
317 | if (ri->extra) | |
318 | ri->extra->igpmetric = 0; | |
319 | return 1; | |
320 | } | |
321 | ||
718e3744 | 322 | #ifdef HAVE_IPV6 |
323 | if (afi == AFI_IP6) | |
324 | return bgp_nexthop_lookup_ipv6 (peer, ri, changed, metricchanged); | |
325 | #endif /* HAVE_IPV6 */ | |
326 | ||
327 | addr = ri->attr->nexthop; | |
328 | ||
329 | memset (&p, 0, sizeof (struct prefix)); | |
330 | p.family = AF_INET; | |
331 | p.prefixlen = IPV4_MAX_BITLEN; | |
332 | p.u.prefix4 = addr; | |
333 | ||
334 | /* IBGP or ebgp-multihop */ | |
5932020b | 335 | rn = bgp_node_get (bgp_nexthop_cache_table[AFI_IP], &p); |
718e3744 | 336 | |
337 | if (rn->info) | |
338 | { | |
339 | bnc = rn->info; | |
340 | bgp_unlock_node (rn); | |
341 | } | |
342 | else | |
343 | { | |
b64bfc1c DO |
344 | if (NULL == (bnc = zlookup_query (addr))) |
345 | bnc = bnc_new (); | |
346 | else | |
718e3744 | 347 | { |
718e3744 | 348 | if (changed) |
349 | { | |
8e80bdf2 DO |
350 | struct bgp_table *old; |
351 | struct bgp_node *oldrn; | |
352 | ||
5932020b | 353 | if (bgp_nexthop_cache_table[AFI_IP] == cache1_table[AFI_IP]) |
354 | old = cache2_table[AFI_IP]; | |
718e3744 | 355 | else |
5932020b | 356 | old = cache1_table[AFI_IP]; |
718e3744 | 357 | |
358 | oldrn = bgp_node_lookup (old, &p); | |
359 | if (oldrn) | |
360 | { | |
8e80bdf2 | 361 | struct bgp_nexthop_cache *oldbnc = oldrn->info; |
718e3744 | 362 | |
8e80bdf2 | 363 | bnc->changed = bgp_nexthop_cache_different (bnc, oldbnc); |
718e3744 | 364 | |
365 | if (bnc->metric != oldbnc->metric) | |
366 | bnc->metricchanged = 1; | |
6c88b44d CC |
367 | |
368 | bgp_unlock_node (oldrn); | |
718e3744 | 369 | } |
370 | } | |
371 | } | |
718e3744 | 372 | rn->info = bnc; |
373 | } | |
374 | ||
375 | if (changed) | |
376 | *changed = bnc->changed; | |
377 | ||
378 | if (metricchanged) | |
379 | *metricchanged = bnc->metricchanged; | |
380 | ||
fb982c25 PJ |
381 | if (bnc->valid && bnc->metric) |
382 | (bgp_info_extra_get(ri))->igpmetric = bnc->metric; | |
383 | else if (ri->extra) | |
384 | ri->extra->igpmetric = 0; | |
718e3744 | 385 | |
386 | return bnc->valid; | |
387 | } | |
388 | ||
389 | /* Reset and free all BGP nexthop cache. */ | |
94f2b392 | 390 | static void |
718e3744 | 391 | bgp_nexthop_cache_reset (struct bgp_table *table) |
392 | { | |
393 | struct bgp_node *rn; | |
394 | struct bgp_nexthop_cache *bnc; | |
395 | ||
396 | for (rn = bgp_table_top (table); rn; rn = bgp_route_next (rn)) | |
397 | if ((bnc = rn->info) != NULL) | |
398 | { | |
399 | bnc_free (bnc); | |
400 | rn->info = NULL; | |
401 | bgp_unlock_node (rn); | |
402 | } | |
403 | } | |
404 | ||
94f2b392 | 405 | static void |
5932020b | 406 | bgp_scan (afi_t afi, safi_t safi) |
718e3744 | 407 | { |
408 | struct bgp_node *rn; | |
409 | struct bgp *bgp; | |
410 | struct bgp_info *bi; | |
411 | struct bgp_info *next; | |
412 | struct peer *peer; | |
1eb8ef25 | 413 | struct listnode *node, *nnode; |
718e3744 | 414 | int valid; |
415 | int current; | |
416 | int changed; | |
417 | int metricchanged; | |
418 | ||
419 | /* Change cache. */ | |
5932020b | 420 | if (bgp_nexthop_cache_table[afi] == cache1_table[afi]) |
421 | bgp_nexthop_cache_table[afi] = cache2_table[afi]; | |
718e3744 | 422 | else |
5932020b | 423 | bgp_nexthop_cache_table[afi] = cache1_table[afi]; |
718e3744 | 424 | |
425 | /* Get default bgp. */ | |
426 | bgp = bgp_get_default (); | |
427 | if (bgp == NULL) | |
428 | return; | |
429 | ||
430 | /* Maximum prefix check */ | |
1eb8ef25 | 431 | for (ALL_LIST_ELEMENTS (bgp->peer, node, nnode, peer)) |
718e3744 | 432 | { |
433 | if (peer->status != Established) | |
434 | continue; | |
435 | ||
5932020b | 436 | if (peer->afc[afi][SAFI_UNICAST]) |
437 | bgp_maximum_prefix_overflow (peer, afi, SAFI_UNICAST, 1); | |
438 | if (peer->afc[afi][SAFI_MULTICAST]) | |
439 | bgp_maximum_prefix_overflow (peer, afi, SAFI_MULTICAST, 1); | |
440 | if (peer->afc[afi][SAFI_MPLS_VPN]) | |
441 | bgp_maximum_prefix_overflow (peer, afi, SAFI_MPLS_VPN, 1); | |
718e3744 | 442 | } |
443 | ||
5932020b | 444 | for (rn = bgp_table_top (bgp->rib[afi][SAFI_UNICAST]); rn; |
718e3744 | 445 | rn = bgp_route_next (rn)) |
446 | { | |
447 | for (bi = rn->info; bi; bi = next) | |
448 | { | |
449 | next = bi->next; | |
450 | ||
451 | if (bi->type == ZEBRA_ROUTE_BGP && bi->sub_type == BGP_ROUTE_NORMAL) | |
452 | { | |
453 | changed = 0; | |
454 | metricchanged = 0; | |
455 | ||
6d85b15b | 456 | if (bi->peer->sort == BGP_PEER_EBGP && bi->peer->ttl == 1) |
8e80bdf2 | 457 | valid = bgp_nexthop_onlink (afi, bi->attr); |
718e3744 | 458 | else |
5932020b | 459 | valid = bgp_nexthop_lookup (afi, bi->peer, bi, |
718e3744 | 460 | &changed, &metricchanged); |
461 | ||
462 | current = CHECK_FLAG (bi->flags, BGP_INFO_VALID) ? 1 : 0; | |
463 | ||
464 | if (changed) | |
465 | SET_FLAG (bi->flags, BGP_INFO_IGP_CHANGED); | |
466 | else | |
467 | UNSET_FLAG (bi->flags, BGP_INFO_IGP_CHANGED); | |
468 | ||
469 | if (valid != current) | |
470 | { | |
471 | if (CHECK_FLAG (bi->flags, BGP_INFO_VALID)) | |
472 | { | |
473 | bgp_aggregate_decrement (bgp, &rn->p, bi, | |
5932020b | 474 | afi, SAFI_UNICAST); |
1a392d46 | 475 | bgp_info_unset_flag (rn, bi, BGP_INFO_VALID); |
718e3744 | 476 | } |
477 | else | |
478 | { | |
1a392d46 | 479 | bgp_info_set_flag (rn, bi, BGP_INFO_VALID); |
718e3744 | 480 | bgp_aggregate_increment (bgp, &rn->p, bi, |
5932020b | 481 | afi, SAFI_UNICAST); |
718e3744 | 482 | } |
483 | } | |
484 | ||
5932020b | 485 | if (CHECK_FLAG (bgp->af_flags[afi][SAFI_UNICAST], |
718e3744 | 486 | BGP_CONFIG_DAMPENING) |
fb982c25 | 487 | && bi->extra && bi->extra->damp_info ) |
5932020b | 488 | if (bgp_damp_scan (bi, afi, SAFI_UNICAST)) |
718e3744 | 489 | bgp_aggregate_increment (bgp, &rn->p, bi, |
5932020b | 490 | afi, SAFI_UNICAST); |
718e3744 | 491 | } |
492 | } | |
5932020b | 493 | bgp_process (bgp, rn, afi, SAFI_UNICAST); |
718e3744 | 494 | } |
495 | ||
496 | /* Flash old cache. */ | |
5932020b | 497 | if (bgp_nexthop_cache_table[afi] == cache1_table[afi]) |
498 | bgp_nexthop_cache_reset (cache2_table[afi]); | |
718e3744 | 499 | else |
5932020b | 500 | bgp_nexthop_cache_reset (cache1_table[afi]); |
f418446b | 501 | |
502 | if (BGP_DEBUG (events, EVENTS)) | |
503 | { | |
504 | if (afi == AFI_IP) | |
505 | zlog_debug ("scanning IPv4 Unicast routing tables"); | |
506 | else if (afi == AFI_IP6) | |
507 | zlog_debug ("scanning IPv6 Unicast routing tables"); | |
508 | } | |
dcab1bb8 CF |
509 | |
510 | /* Reevaluate default-originate route-maps and announce/withdraw | |
511 | * default route if neccesary. */ | |
512 | for (ALL_LIST_ELEMENTS (bgp->peer, node, nnode, peer)) | |
513 | { | |
514 | if (peer->status == Established | |
515 | && CHECK_FLAG(peer->af_flags[afi][safi], PEER_FLAG_DEFAULT_ORIGINATE) | |
516 | && peer->default_rmap[afi][safi].name) | |
517 | bgp_default_originate (peer, afi, safi, 0); | |
518 | } | |
718e3744 | 519 | } |
718e3744 | 520 | |
521 | /* BGP scan thread. This thread check nexthop reachability. */ | |
94f2b392 | 522 | static int |
5932020b | 523 | bgp_scan_timer (struct thread *t) |
718e3744 | 524 | { |
525 | bgp_scan_thread = | |
5932020b | 526 | thread_add_timer (master, bgp_scan_timer, NULL, bgp_scan_interval); |
718e3744 | 527 | |
f418446b | 528 | if (BGP_DEBUG (events, EVENTS)) |
478ba054 | 529 | zlog_debug ("Performing BGP general scanning"); |
718e3744 | 530 | |
5932020b | 531 | bgp_scan (AFI_IP, SAFI_UNICAST); |
718e3744 | 532 | |
533 | #ifdef HAVE_IPV6 | |
5932020b | 534 | bgp_scan (AFI_IP6, SAFI_UNICAST); |
718e3744 | 535 | #endif /* HAVE_IPV6 */ |
536 | ||
537 | return 0; | |
538 | } | |
10f9bf3f JBD |
539 | |
540 | /* BGP own address structure */ | |
541 | struct bgp_addr | |
542 | { | |
543 | struct in_addr addr; | |
544 | int refcnt; | |
545 | }; | |
546 | ||
547 | static struct hash *bgp_address_hash; | |
548 | ||
549 | static void * | |
550 | bgp_address_hash_alloc (void *p) | |
551 | { | |
552 | struct in_addr *val = p; | |
553 | struct bgp_addr *addr; | |
554 | ||
555 | addr = XMALLOC (MTYPE_BGP_ADDR, sizeof (struct bgp_addr)); | |
556 | addr->refcnt = 0; | |
557 | addr->addr.s_addr = val->s_addr; | |
558 | ||
559 | return addr; | |
560 | } | |
561 | ||
562 | static unsigned int | |
563 | bgp_address_hash_key_make (void *p) | |
564 | { | |
565 | const struct bgp_addr *addr = p; | |
566 | ||
567 | return jhash_1word(addr->addr.s_addr, 0); | |
568 | } | |
569 | ||
570 | static int | |
571 | bgp_address_hash_cmp (const void *p1, const void *p2) | |
572 | { | |
573 | const struct bgp_addr *addr1 = p1; | |
574 | const struct bgp_addr *addr2 = p2; | |
575 | ||
576 | return addr1->addr.s_addr == addr2->addr.s_addr; | |
577 | } | |
578 | ||
579 | void | |
580 | bgp_address_init (void) | |
581 | { | |
582 | bgp_address_hash = hash_create (bgp_address_hash_key_make, | |
583 | bgp_address_hash_cmp); | |
584 | } | |
585 | ||
586 | static void | |
587 | bgp_address_add (struct prefix *p) | |
588 | { | |
589 | struct bgp_addr tmp; | |
590 | struct bgp_addr *addr; | |
591 | ||
592 | tmp.addr = p->u.prefix4; | |
593 | ||
594 | addr = hash_get (bgp_address_hash, &tmp, bgp_address_hash_alloc); | |
595 | addr->refcnt++; | |
596 | } | |
597 | ||
598 | static void | |
599 | bgp_address_del (struct prefix *p) | |
600 | { | |
601 | struct bgp_addr tmp; | |
602 | struct bgp_addr *addr; | |
603 | ||
604 | tmp.addr = p->u.prefix4; | |
605 | ||
606 | addr = hash_lookup (bgp_address_hash, &tmp); | |
9e47abd8 RG |
607 | /* may have been deleted earlier by bgp_interface_down() */ |
608 | if (addr == NULL) | |
609 | return; | |
610 | ||
10f9bf3f JBD |
611 | addr->refcnt--; |
612 | ||
613 | if (addr->refcnt == 0) | |
614 | { | |
615 | hash_release (bgp_address_hash, addr); | |
616 | XFREE (MTYPE_BGP_ADDR, addr); | |
617 | } | |
618 | } | |
619 | ||
718e3744 | 620 | \f |
5932020b | 621 | struct bgp_connected_ref |
718e3744 | 622 | { |
623 | unsigned int refcnt; | |
624 | }; | |
625 | ||
626 | void | |
627 | bgp_connected_add (struct connected *ifc) | |
628 | { | |
629 | struct prefix p; | |
630 | struct prefix *addr; | |
718e3744 | 631 | struct interface *ifp; |
632 | struct bgp_node *rn; | |
5932020b | 633 | struct bgp_connected_ref *bc; |
718e3744 | 634 | |
635 | ifp = ifc->ifp; | |
636 | ||
637 | if (! ifp) | |
638 | return; | |
639 | ||
640 | if (if_is_loopback (ifp)) | |
641 | return; | |
642 | ||
643 | addr = ifc->address; | |
718e3744 | 644 | |
645 | if (addr->family == AF_INET) | |
646 | { | |
e4529636 | 647 | PREFIX_COPY_IPV4(&p, CONNECTED_PREFIX(ifc)); |
718e3744 | 648 | apply_mask_ipv4 ((struct prefix_ipv4 *) &p); |
649 | ||
650 | if (prefix_ipv4_any ((struct prefix_ipv4 *) &p)) | |
651 | return; | |
652 | ||
10f9bf3f JBD |
653 | bgp_address_add (addr); |
654 | ||
5932020b | 655 | rn = bgp_node_get (bgp_connected_table[AFI_IP], (struct prefix *) &p); |
718e3744 | 656 | if (rn->info) |
657 | { | |
658 | bc = rn->info; | |
659 | bc->refcnt++; | |
660 | } | |
661 | else | |
662 | { | |
6c88b44d | 663 | bc = XCALLOC (MTYPE_BGP_CONN, sizeof (struct bgp_connected_ref)); |
718e3744 | 664 | bc->refcnt = 1; |
665 | rn->info = bc; | |
666 | } | |
667 | } | |
668 | #ifdef HAVE_IPV6 | |
e4529636 | 669 | else if (addr->family == AF_INET6) |
718e3744 | 670 | { |
e4529636 | 671 | PREFIX_COPY_IPV6(&p, CONNECTED_PREFIX(ifc)); |
718e3744 | 672 | apply_mask_ipv6 ((struct prefix_ipv6 *) &p); |
673 | ||
674 | if (IN6_IS_ADDR_UNSPECIFIED (&p.u.prefix6)) | |
675 | return; | |
676 | ||
677 | if (IN6_IS_ADDR_LINKLOCAL (&p.u.prefix6)) | |
678 | return; | |
679 | ||
5932020b | 680 | rn = bgp_node_get (bgp_connected_table[AFI_IP6], (struct prefix *) &p); |
718e3744 | 681 | if (rn->info) |
682 | { | |
683 | bc = rn->info; | |
684 | bc->refcnt++; | |
685 | } | |
686 | else | |
687 | { | |
6c88b44d | 688 | bc = XCALLOC (MTYPE_BGP_CONN, sizeof (struct bgp_connected_ref)); |
718e3744 | 689 | bc->refcnt = 1; |
690 | rn->info = bc; | |
691 | } | |
692 | } | |
693 | #endif /* HAVE_IPV6 */ | |
694 | } | |
695 | ||
696 | void | |
697 | bgp_connected_delete (struct connected *ifc) | |
698 | { | |
699 | struct prefix p; | |
700 | struct prefix *addr; | |
718e3744 | 701 | struct interface *ifp; |
702 | struct bgp_node *rn; | |
5932020b | 703 | struct bgp_connected_ref *bc; |
718e3744 | 704 | |
705 | ifp = ifc->ifp; | |
706 | ||
707 | if (if_is_loopback (ifp)) | |
708 | return; | |
709 | ||
710 | addr = ifc->address; | |
718e3744 | 711 | |
712 | if (addr->family == AF_INET) | |
713 | { | |
e4529636 | 714 | PREFIX_COPY_IPV4(&p, CONNECTED_PREFIX(ifc)); |
718e3744 | 715 | apply_mask_ipv4 ((struct prefix_ipv4 *) &p); |
716 | ||
717 | if (prefix_ipv4_any ((struct prefix_ipv4 *) &p)) | |
718 | return; | |
719 | ||
10f9bf3f JBD |
720 | bgp_address_del (addr); |
721 | ||
5932020b | 722 | rn = bgp_node_lookup (bgp_connected_table[AFI_IP], &p); |
718e3744 | 723 | if (! rn) |
724 | return; | |
725 | ||
726 | bc = rn->info; | |
727 | bc->refcnt--; | |
728 | if (bc->refcnt == 0) | |
729 | { | |
6c88b44d | 730 | XFREE (MTYPE_BGP_CONN, bc); |
718e3744 | 731 | rn->info = NULL; |
732 | } | |
733 | bgp_unlock_node (rn); | |
734 | bgp_unlock_node (rn); | |
735 | } | |
736 | #ifdef HAVE_IPV6 | |
737 | else if (addr->family == AF_INET6) | |
738 | { | |
e4529636 | 739 | PREFIX_COPY_IPV6(&p, CONNECTED_PREFIX(ifc)); |
718e3744 | 740 | apply_mask_ipv6 ((struct prefix_ipv6 *) &p); |
741 | ||
742 | if (IN6_IS_ADDR_UNSPECIFIED (&p.u.prefix6)) | |
743 | return; | |
744 | ||
745 | if (IN6_IS_ADDR_LINKLOCAL (&p.u.prefix6)) | |
746 | return; | |
747 | ||
5932020b | 748 | rn = bgp_node_lookup (bgp_connected_table[AFI_IP6], (struct prefix *) &p); |
718e3744 | 749 | if (! rn) |
750 | return; | |
751 | ||
752 | bc = rn->info; | |
753 | bc->refcnt--; | |
754 | if (bc->refcnt == 0) | |
755 | { | |
6c88b44d | 756 | XFREE (MTYPE_BGP_CONN, bc); |
718e3744 | 757 | rn->info = NULL; |
758 | } | |
759 | bgp_unlock_node (rn); | |
760 | bgp_unlock_node (rn); | |
761 | } | |
762 | #endif /* HAVE_IPV6 */ | |
763 | } | |
764 | ||
765 | int | |
10f9bf3f | 766 | bgp_nexthop_self (struct attr *attr) |
718e3744 | 767 | { |
10f9bf3f | 768 | struct bgp_addr tmp, *addr; |
718e3744 | 769 | |
10f9bf3f JBD |
770 | tmp.addr = attr->nexthop; |
771 | ||
772 | addr = hash_lookup (bgp_address_hash, &tmp); | |
773 | if (addr) | |
774 | return 1; | |
718e3744 | 775 | |
718e3744 | 776 | return 0; |
777 | } | |
778 | \f | |
94f2b392 | 779 | static struct bgp_nexthop_cache * |
66e5cd87 | 780 | zlookup_read (void) |
718e3744 | 781 | { |
782 | struct stream *s; | |
d3092e7f | 783 | uint16_t length; |
784 | u_char marker; | |
785 | u_char version; | |
786 | uint16_t command; | |
718e3744 | 787 | int nbytes; |
788 | struct in_addr raddr; | |
d3092e7f | 789 | uint32_t metric; |
718e3744 | 790 | int i; |
791 | u_char nexthop_num; | |
792 | struct nexthop *nexthop; | |
793 | struct bgp_nexthop_cache *bnc; | |
794 | ||
795 | s = zlookup->ibuf; | |
796 | stream_reset (s); | |
797 | ||
798 | nbytes = stream_read (s, zlookup->sock, 2); | |
799 | length = stream_getw (s); | |
800 | ||
801 | nbytes = stream_read (s, zlookup->sock, length - 2); | |
d3092e7f | 802 | marker = stream_getc (s); |
803 | version = stream_getc (s); | |
804 | ||
805 | if (version != ZSERV_VERSION || marker != ZEBRA_HEADER_MARKER) | |
806 | { | |
807 | zlog_err("%s: socket %d version mismatch, marker %d, version %d", | |
808 | __func__, zlookup->sock, marker, version); | |
809 | return NULL; | |
810 | } | |
811 | ||
812 | command = stream_getw (s); | |
813 | ||
718e3744 | 814 | raddr.s_addr = stream_get_ipv4 (s); |
815 | metric = stream_getl (s); | |
816 | nexthop_num = stream_getc (s); | |
817 | ||
818 | if (nexthop_num) | |
819 | { | |
820 | bnc = bnc_new (); | |
821 | bnc->valid = 1; | |
822 | bnc->metric = metric; | |
823 | bnc->nexthop_num = nexthop_num; | |
824 | ||
825 | for (i = 0; i < nexthop_num; i++) | |
826 | { | |
393deb9b | 827 | nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
718e3744 | 828 | nexthop->type = stream_getc (s); |
829 | switch (nexthop->type) | |
830 | { | |
831 | case ZEBRA_NEXTHOP_IPV4: | |
832 | nexthop->gate.ipv4.s_addr = stream_get_ipv4 (s); | |
833 | break; | |
834 | case ZEBRA_NEXTHOP_IFINDEX: | |
835 | case ZEBRA_NEXTHOP_IFNAME: | |
836 | nexthop->ifindex = stream_getl (s); | |
837 | break; | |
fa2b17e3 | 838 | default: |
839 | /* do nothing */ | |
840 | break; | |
718e3744 | 841 | } |
842 | bnc_nexthop_add (bnc, nexthop); | |
843 | } | |
844 | } | |
845 | else | |
846 | return NULL; | |
847 | ||
848 | return bnc; | |
849 | } | |
850 | ||
851 | struct bgp_nexthop_cache * | |
852 | zlookup_query (struct in_addr addr) | |
853 | { | |
854 | int ret; | |
855 | struct stream *s; | |
856 | ||
857 | /* Check socket. */ | |
858 | if (zlookup->sock < 0) | |
859 | return NULL; | |
860 | ||
861 | s = zlookup->obuf; | |
862 | stream_reset (s); | |
d3092e7f | 863 | zclient_create_header (s, ZEBRA_IPV4_NEXTHOP_LOOKUP); |
718e3744 | 864 | stream_put_in_addr (s, &addr); |
d3092e7f | 865 | |
866 | stream_putw_at (s, 0, stream_get_endp (s)); | |
867 | ||
868 | ret = writen (zlookup->sock, s->data, stream_get_endp (s)); | |
718e3744 | 869 | if (ret < 0) |
870 | { | |
871 | zlog_err ("can't write to zlookup->sock"); | |
872 | close (zlookup->sock); | |
873 | zlookup->sock = -1; | |
874 | return NULL; | |
875 | } | |
876 | if (ret == 0) | |
877 | { | |
878 | zlog_err ("zlookup->sock connection closed"); | |
879 | close (zlookup->sock); | |
880 | zlookup->sock = -1; | |
881 | return NULL; | |
882 | } | |
883 | ||
884 | return zlookup_read (); | |
885 | } | |
886 | ||
887 | #ifdef HAVE_IPV6 | |
94f2b392 | 888 | static struct bgp_nexthop_cache * |
66e5cd87 | 889 | zlookup_read_ipv6 (void) |
718e3744 | 890 | { |
891 | struct stream *s; | |
d3092e7f | 892 | uint16_t length; |
893 | u_char version, marker; | |
894 | uint16_t command; | |
718e3744 | 895 | int nbytes; |
896 | struct in6_addr raddr; | |
d3092e7f | 897 | uint32_t metric; |
718e3744 | 898 | int i; |
899 | u_char nexthop_num; | |
900 | struct nexthop *nexthop; | |
901 | struct bgp_nexthop_cache *bnc; | |
902 | ||
903 | s = zlookup->ibuf; | |
904 | stream_reset (s); | |
905 | ||
906 | nbytes = stream_read (s, zlookup->sock, 2); | |
907 | length = stream_getw (s); | |
908 | ||
909 | nbytes = stream_read (s, zlookup->sock, length - 2); | |
d3092e7f | 910 | marker = stream_getc (s); |
911 | version = stream_getc (s); | |
912 | ||
913 | if (version != ZSERV_VERSION || marker != ZEBRA_HEADER_MARKER) | |
914 | { | |
915 | zlog_err("%s: socket %d version mismatch, marker %d, version %d", | |
916 | __func__, zlookup->sock, marker, version); | |
917 | return NULL; | |
918 | } | |
919 | ||
920 | command = stream_getw (s); | |
921 | ||
718e3744 | 922 | stream_get (&raddr, s, 16); |
923 | ||
924 | metric = stream_getl (s); | |
925 | nexthop_num = stream_getc (s); | |
926 | ||
927 | if (nexthop_num) | |
928 | { | |
929 | bnc = bnc_new (); | |
930 | bnc->valid = 1; | |
931 | bnc->metric = metric; | |
932 | bnc->nexthop_num = nexthop_num; | |
933 | ||
934 | for (i = 0; i < nexthop_num; i++) | |
935 | { | |
393deb9b | 936 | nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
718e3744 | 937 | nexthop->type = stream_getc (s); |
938 | switch (nexthop->type) | |
939 | { | |
940 | case ZEBRA_NEXTHOP_IPV6: | |
941 | stream_get (&nexthop->gate.ipv6, s, 16); | |
942 | break; | |
943 | case ZEBRA_NEXTHOP_IPV6_IFINDEX: | |
944 | case ZEBRA_NEXTHOP_IPV6_IFNAME: | |
945 | stream_get (&nexthop->gate.ipv6, s, 16); | |
946 | nexthop->ifindex = stream_getl (s); | |
947 | break; | |
948 | case ZEBRA_NEXTHOP_IFINDEX: | |
949 | case ZEBRA_NEXTHOP_IFNAME: | |
950 | nexthop->ifindex = stream_getl (s); | |
951 | break; | |
fa2b17e3 | 952 | default: |
953 | /* do nothing */ | |
954 | break; | |
718e3744 | 955 | } |
956 | bnc_nexthop_add (bnc, nexthop); | |
957 | } | |
958 | } | |
959 | else | |
960 | return NULL; | |
961 | ||
962 | return bnc; | |
963 | } | |
964 | ||
965 | struct bgp_nexthop_cache * | |
966 | zlookup_query_ipv6 (struct in6_addr *addr) | |
967 | { | |
968 | int ret; | |
969 | struct stream *s; | |
970 | ||
971 | /* Check socket. */ | |
972 | if (zlookup->sock < 0) | |
973 | return NULL; | |
974 | ||
975 | s = zlookup->obuf; | |
976 | stream_reset (s); | |
d3092e7f | 977 | zclient_create_header (s, ZEBRA_IPV6_NEXTHOP_LOOKUP); |
718e3744 | 978 | stream_put (s, addr, 16); |
d3092e7f | 979 | stream_putw_at (s, 0, stream_get_endp (s)); |
980 | ||
981 | ret = writen (zlookup->sock, s->data, stream_get_endp (s)); | |
718e3744 | 982 | if (ret < 0) |
983 | { | |
984 | zlog_err ("can't write to zlookup->sock"); | |
985 | close (zlookup->sock); | |
986 | zlookup->sock = -1; | |
987 | return NULL; | |
988 | } | |
989 | if (ret == 0) | |
990 | { | |
991 | zlog_err ("zlookup->sock connection closed"); | |
992 | close (zlookup->sock); | |
993 | zlookup->sock = -1; | |
994 | return NULL; | |
995 | } | |
996 | ||
997 | return zlookup_read_ipv6 (); | |
998 | } | |
999 | #endif /* HAVE_IPV6 */ | |
1000 | ||
94f2b392 | 1001 | static int |
1002 | bgp_import_check (struct prefix *p, u_int32_t *igpmetric, | |
1003 | struct in_addr *igpnexthop) | |
718e3744 | 1004 | { |
1005 | struct stream *s; | |
1006 | int ret; | |
d3092e7f | 1007 | u_int16_t length, command; |
1008 | u_char version, marker; | |
718e3744 | 1009 | int nbytes; |
1010 | struct in_addr addr; | |
1011 | struct in_addr nexthop; | |
1012 | u_int32_t metric = 0; | |
1013 | u_char nexthop_num; | |
1014 | u_char nexthop_type; | |
1015 | ||
1016 | /* If lookup connection is not available return valid. */ | |
1017 | if (zlookup->sock < 0) | |
1018 | { | |
1019 | if (igpmetric) | |
1020 | *igpmetric = 0; | |
1021 | return 1; | |
1022 | } | |
1023 | ||
1024 | /* Send query to the lookup connection */ | |
1025 | s = zlookup->obuf; | |
1026 | stream_reset (s); | |
d3092e7f | 1027 | zclient_create_header (s, ZEBRA_IPV4_IMPORT_LOOKUP); |
1028 | ||
718e3744 | 1029 | stream_putc (s, p->prefixlen); |
1030 | stream_put_in_addr (s, &p->u.prefix4); | |
d3092e7f | 1031 | |
1032 | stream_putw_at (s, 0, stream_get_endp (s)); | |
1033 | ||
718e3744 | 1034 | /* Write the packet. */ |
d3092e7f | 1035 | ret = writen (zlookup->sock, s->data, stream_get_endp (s)); |
718e3744 | 1036 | |
1037 | if (ret < 0) | |
1038 | { | |
1039 | zlog_err ("can't write to zlookup->sock"); | |
1040 | close (zlookup->sock); | |
1041 | zlookup->sock = -1; | |
1042 | return 1; | |
1043 | } | |
1044 | if (ret == 0) | |
1045 | { | |
1046 | zlog_err ("zlookup->sock connection closed"); | |
1047 | close (zlookup->sock); | |
1048 | zlookup->sock = -1; | |
1049 | return 1; | |
1050 | } | |
1051 | ||
1052 | /* Get result. */ | |
1053 | stream_reset (s); | |
1054 | ||
1055 | /* Fetch length. */ | |
1056 | nbytes = stream_read (s, zlookup->sock, 2); | |
1057 | length = stream_getw (s); | |
1058 | ||
1059 | /* Fetch whole data. */ | |
1060 | nbytes = stream_read (s, zlookup->sock, length - 2); | |
d3092e7f | 1061 | marker = stream_getc (s); |
1062 | version = stream_getc (s); | |
1063 | ||
1064 | if (version != ZSERV_VERSION || marker != ZEBRA_HEADER_MARKER) | |
1065 | { | |
1066 | zlog_err("%s: socket %d version mismatch, marker %d, version %d", | |
1067 | __func__, zlookup->sock, marker, version); | |
1068 | return 0; | |
1069 | } | |
1070 | ||
1071 | command = stream_getw (s); | |
1072 | ||
718e3744 | 1073 | addr.s_addr = stream_get_ipv4 (s); |
1074 | metric = stream_getl (s); | |
1075 | nexthop_num = stream_getc (s); | |
1076 | ||
1077 | /* Set IGP metric value. */ | |
1078 | if (igpmetric) | |
1079 | *igpmetric = metric; | |
1080 | ||
1081 | /* If there is nexthop then this is active route. */ | |
1082 | if (nexthop_num) | |
1083 | { | |
1084 | nexthop.s_addr = 0; | |
1085 | nexthop_type = stream_getc (s); | |
1086 | if (nexthop_type == ZEBRA_NEXTHOP_IPV4) | |
1087 | { | |
1088 | nexthop.s_addr = stream_get_ipv4 (s); | |
1089 | if (igpnexthop) | |
1090 | *igpnexthop = nexthop; | |
1091 | } | |
1092 | else | |
1093 | *igpnexthop = nexthop; | |
1094 | ||
1095 | return 1; | |
1096 | } | |
1097 | else | |
1098 | return 0; | |
1099 | } | |
1100 | ||
1101 | /* Scan all configured BGP route then check the route exists in IGP or | |
1102 | not. */ | |
94f2b392 | 1103 | static int |
718e3744 | 1104 | bgp_import (struct thread *t) |
1105 | { | |
1106 | struct bgp *bgp; | |
1107 | struct bgp_node *rn; | |
1108 | struct bgp_static *bgp_static; | |
1eb8ef25 | 1109 | struct listnode *node, *nnode; |
718e3744 | 1110 | int valid; |
1111 | u_int32_t metric; | |
1112 | struct in_addr nexthop; | |
1113 | afi_t afi; | |
1114 | safi_t safi; | |
1115 | ||
1116 | bgp_import_thread = | |
1117 | thread_add_timer (master, bgp_import, NULL, bgp_import_interval); | |
1118 | ||
f418446b | 1119 | if (BGP_DEBUG (events, EVENTS)) |
1120 | zlog_debug ("Import timer expired."); | |
718e3744 | 1121 | |
1eb8ef25 | 1122 | for (ALL_LIST_ELEMENTS (bm->bgp, node, nnode, bgp)) |
6cbbc3cc | 1123 | { |
1124 | for (afi = AFI_IP; afi < AFI_MAX; afi++) | |
1125 | for (safi = SAFI_UNICAST; safi < SAFI_MPLS_VPN; safi++) | |
1126 | for (rn = bgp_table_top (bgp->route[afi][safi]); rn; | |
1127 | rn = bgp_route_next (rn)) | |
1128 | if ((bgp_static = rn->info) != NULL) | |
718e3744 | 1129 | { |
6cbbc3cc | 1130 | if (bgp_static->backdoor) |
1131 | continue; | |
718e3744 | 1132 | |
6cbbc3cc | 1133 | valid = bgp_static->valid; |
1134 | metric = bgp_static->igpmetric; | |
1135 | nexthop = bgp_static->igpnexthop; | |
1136 | ||
1137 | if (bgp_flag_check (bgp, BGP_FLAG_IMPORT_CHECK) | |
1138 | && afi == AFI_IP && safi == SAFI_UNICAST) | |
1139 | bgp_static->valid = bgp_import_check (&rn->p, &bgp_static->igpmetric, | |
1140 | &bgp_static->igpnexthop); | |
718e3744 | 1141 | else |
6cbbc3cc | 1142 | { |
1143 | bgp_static->valid = 1; | |
1144 | bgp_static->igpmetric = 0; | |
1145 | bgp_static->igpnexthop.s_addr = 0; | |
1146 | } | |
1147 | ||
1148 | if (bgp_static->valid != valid) | |
1149 | { | |
1150 | if (bgp_static->valid) | |
1151 | bgp_static_update (bgp, &rn->p, bgp_static, afi, safi); | |
1152 | else | |
1153 | bgp_static_withdraw (bgp, &rn->p, afi, safi); | |
1154 | } | |
1155 | else if (bgp_static->valid) | |
1156 | { | |
1157 | if (bgp_static->igpmetric != metric | |
1158 | || bgp_static->igpnexthop.s_addr != nexthop.s_addr | |
1159 | || bgp_static->rmap.name) | |
1160 | bgp_static_update (bgp, &rn->p, bgp_static, afi, safi); | |
1161 | } | |
718e3744 | 1162 | } |
6cbbc3cc | 1163 | } |
718e3744 | 1164 | return 0; |
1165 | } | |
1166 | ||
1167 | /* Connect to zebra for nexthop lookup. */ | |
94f2b392 | 1168 | static int |
718e3744 | 1169 | zlookup_connect (struct thread *t) |
1170 | { | |
1171 | struct zclient *zlookup; | |
1172 | ||
1173 | zlookup = THREAD_ARG (t); | |
1174 | zlookup->t_connect = NULL; | |
1175 | ||
1176 | if (zlookup->sock != -1) | |
1177 | return 0; | |
1178 | ||
b5114685 | 1179 | if (zclient_socket_connect (zlookup) < 0) |
718e3744 | 1180 | return -1; |
1181 | ||
718e3744 | 1182 | return 0; |
1183 | } | |
1184 | ||
1185 | /* Check specified multiaccess next-hop. */ | |
1186 | int | |
1187 | bgp_multiaccess_check_v4 (struct in_addr nexthop, char *peer) | |
1188 | { | |
1189 | struct bgp_node *rn1; | |
1190 | struct bgp_node *rn2; | |
1191 | struct prefix p1; | |
1192 | struct prefix p2; | |
1193 | struct in_addr addr; | |
1194 | int ret; | |
1195 | ||
1196 | ret = inet_aton (peer, &addr); | |
1197 | if (! ret) | |
1198 | return 0; | |
1199 | ||
1200 | memset (&p1, 0, sizeof (struct prefix)); | |
1201 | p1.family = AF_INET; | |
1202 | p1.prefixlen = IPV4_MAX_BITLEN; | |
1203 | p1.u.prefix4 = nexthop; | |
1204 | memset (&p2, 0, sizeof (struct prefix)); | |
1205 | p2.family = AF_INET; | |
1206 | p2.prefixlen = IPV4_MAX_BITLEN; | |
1207 | p2.u.prefix4 = addr; | |
1208 | ||
1209 | /* If bgp scan is not enabled, return invalid. */ | |
1210 | if (zlookup->sock < 0) | |
1211 | return 0; | |
1212 | ||
5932020b | 1213 | rn1 = bgp_node_match (bgp_connected_table[AFI_IP], &p1); |
718e3744 | 1214 | if (! rn1) |
1215 | return 0; | |
6c88b44d | 1216 | bgp_unlock_node (rn1); |
718e3744 | 1217 | |
5932020b | 1218 | rn2 = bgp_node_match (bgp_connected_table[AFI_IP], &p2); |
718e3744 | 1219 | if (! rn2) |
1220 | return 0; | |
6c88b44d | 1221 | bgp_unlock_node (rn2); |
718e3744 | 1222 | |
6c88b44d CC |
1223 | /* This is safe, even with above unlocks, since we are just |
1224 | comparing pointers to the objects, not the objects themselves. */ | |
718e3744 | 1225 | if (rn1 == rn2) |
1226 | return 1; | |
1227 | ||
1228 | return 0; | |
1229 | } | |
1230 | \f | |
1231 | DEFUN (bgp_scan_time, | |
1232 | bgp_scan_time_cmd, | |
1233 | "bgp scan-time <5-60>", | |
1234 | "BGP specific commands\n" | |
1235 | "Configure background scanner interval\n" | |
1236 | "Scanner interval (seconds)\n") | |
1237 | { | |
1238 | bgp_scan_interval = atoi (argv[0]); | |
1239 | ||
1240 | if (bgp_scan_thread) | |
1241 | { | |
1242 | thread_cancel (bgp_scan_thread); | |
1243 | bgp_scan_thread = | |
5932020b | 1244 | thread_add_timer (master, bgp_scan_timer, NULL, bgp_scan_interval); |
718e3744 | 1245 | } |
1246 | ||
1247 | return CMD_SUCCESS; | |
1248 | } | |
1249 | ||
1250 | DEFUN (no_bgp_scan_time, | |
1251 | no_bgp_scan_time_cmd, | |
1252 | "no bgp scan-time", | |
1253 | NO_STR | |
1254 | "BGP specific commands\n" | |
1255 | "Configure background scanner interval\n") | |
1256 | { | |
1257 | bgp_scan_interval = BGP_SCAN_INTERVAL_DEFAULT; | |
1258 | ||
1259 | if (bgp_scan_thread) | |
1260 | { | |
1261 | thread_cancel (bgp_scan_thread); | |
1262 | bgp_scan_thread = | |
5932020b | 1263 | thread_add_timer (master, bgp_scan_timer, NULL, bgp_scan_interval); |
718e3744 | 1264 | } |
1265 | ||
1266 | return CMD_SUCCESS; | |
1267 | } | |
1268 | ||
1269 | ALIAS (no_bgp_scan_time, | |
1270 | no_bgp_scan_time_val_cmd, | |
1271 | "no bgp scan-time <5-60>", | |
1272 | NO_STR | |
1273 | "BGP specific commands\n" | |
1274 | "Configure background scanner interval\n" | |
1275 | "Scanner interval (seconds)\n") | |
1276 | ||
318f0d8a DO |
1277 | static int |
1278 | show_ip_bgp_scan_tables (struct vty *vty, const char detail) | |
718e3744 | 1279 | { |
1280 | struct bgp_node *rn; | |
1281 | struct bgp_nexthop_cache *bnc; | |
318f0d8a DO |
1282 | char buf[INET6_ADDRSTRLEN]; |
1283 | u_char i; | |
718e3744 | 1284 | |
1285 | if (bgp_scan_thread) | |
1286 | vty_out (vty, "BGP scan is running%s", VTY_NEWLINE); | |
1287 | else | |
1288 | vty_out (vty, "BGP scan is not running%s", VTY_NEWLINE); | |
1289 | vty_out (vty, "BGP scan interval is %d%s", bgp_scan_interval, VTY_NEWLINE); | |
1290 | ||
1291 | vty_out (vty, "Current BGP nexthop cache:%s", VTY_NEWLINE); | |
5932020b | 1292 | for (rn = bgp_table_top (bgp_nexthop_cache_table[AFI_IP]); rn; rn = bgp_route_next (rn)) |
718e3744 | 1293 | if ((bnc = rn->info) != NULL) |
1294 | { | |
1295 | if (bnc->valid) | |
318f0d8a | 1296 | { |
718e3744 | 1297 | vty_out (vty, " %s valid [IGP metric %d]%s", |
318f0d8a DO |
1298 | inet_ntop (AF_INET, &rn->p.u.prefix4, buf, INET6_ADDRSTRLEN), bnc->metric, VTY_NEWLINE); |
1299 | if (detail) | |
1300 | for (i = 0; i < bnc->nexthop_num; i++) | |
0e8032d6 DO |
1301 | switch (bnc->nexthop[i].type) |
1302 | { | |
1303 | case NEXTHOP_TYPE_IPV4: | |
1304 | vty_out (vty, " gate %s%s", inet_ntop (AF_INET, &bnc->nexthop[i].gate.ipv4, buf, INET6_ADDRSTRLEN), VTY_NEWLINE); | |
1305 | break; | |
1306 | case NEXTHOP_TYPE_IFINDEX: | |
1307 | vty_out (vty, " ifidx %u%s", bnc->nexthop[i].ifindex, VTY_NEWLINE); | |
1308 | break; | |
1309 | default: | |
1310 | vty_out (vty, " invalid nexthop type %u%s", bnc->nexthop[i].type, VTY_NEWLINE); | |
1311 | } | |
318f0d8a | 1312 | } |
718e3744 | 1313 | else |
1314 | vty_out (vty, " %s invalid%s", | |
318f0d8a | 1315 | inet_ntop (AF_INET, &rn->p.u.prefix4, buf, INET6_ADDRSTRLEN), VTY_NEWLINE); |
718e3744 | 1316 | } |
1317 | ||
1318 | #ifdef HAVE_IPV6 | |
1319 | { | |
5932020b | 1320 | for (rn = bgp_table_top (bgp_nexthop_cache_table[AFI_IP6]); |
1321 | rn; | |
1322 | rn = bgp_route_next (rn)) | |
718e3744 | 1323 | if ((bnc = rn->info) != NULL) |
1324 | { | |
1325 | if (bnc->valid) | |
318f0d8a | 1326 | { |
718e3744 | 1327 | vty_out (vty, " %s valid [IGP metric %d]%s", |
318f0d8a | 1328 | inet_ntop (AF_INET6, &rn->p.u.prefix6, buf, INET6_ADDRSTRLEN), |
718e3744 | 1329 | bnc->metric, VTY_NEWLINE); |
318f0d8a DO |
1330 | if (detail) |
1331 | for (i = 0; i < bnc->nexthop_num; i++) | |
0e8032d6 DO |
1332 | switch (bnc->nexthop[i].type) |
1333 | { | |
1334 | case NEXTHOP_TYPE_IPV6: | |
1335 | vty_out (vty, " gate %s%s", inet_ntop (AF_INET6, &bnc->nexthop[i].gate.ipv6, buf, INET6_ADDRSTRLEN), VTY_NEWLINE); | |
1336 | break; | |
1337 | case NEXTHOP_TYPE_IFINDEX: | |
1338 | vty_out (vty, " ifidx %u%s", bnc->nexthop[i].ifindex, VTY_NEWLINE); | |
1339 | break; | |
1340 | default: | |
1341 | vty_out (vty, " invalid nexthop type %u%s", bnc->nexthop[i].type, VTY_NEWLINE); | |
1342 | } | |
318f0d8a | 1343 | } |
718e3744 | 1344 | else |
1345 | vty_out (vty, " %s invalid%s", | |
318f0d8a | 1346 | inet_ntop (AF_INET6, &rn->p.u.prefix6, buf, INET6_ADDRSTRLEN), |
718e3744 | 1347 | VTY_NEWLINE); |
1348 | } | |
1349 | } | |
1350 | #endif /* HAVE_IPV6 */ | |
1351 | ||
1352 | vty_out (vty, "BGP connected route:%s", VTY_NEWLINE); | |
5932020b | 1353 | for (rn = bgp_table_top (bgp_connected_table[AFI_IP]); |
1354 | rn; | |
1355 | rn = bgp_route_next (rn)) | |
718e3744 | 1356 | if (rn->info != NULL) |
1357 | vty_out (vty, " %s/%d%s", inet_ntoa (rn->p.u.prefix4), rn->p.prefixlen, | |
1358 | VTY_NEWLINE); | |
1359 | ||
1360 | #ifdef HAVE_IPV6 | |
1361 | { | |
5932020b | 1362 | for (rn = bgp_table_top (bgp_connected_table[AFI_IP6]); |
1363 | rn; | |
1364 | rn = bgp_route_next (rn)) | |
718e3744 | 1365 | if (rn->info != NULL) |
1366 | vty_out (vty, " %s/%d%s", | |
318f0d8a | 1367 | inet_ntop (AF_INET6, &rn->p.u.prefix6, buf, INET6_ADDRSTRLEN), |
718e3744 | 1368 | rn->p.prefixlen, |
1369 | VTY_NEWLINE); | |
1370 | } | |
1371 | #endif /* HAVE_IPV6 */ | |
1372 | ||
1373 | return CMD_SUCCESS; | |
1374 | } | |
1375 | ||
318f0d8a DO |
1376 | DEFUN (show_ip_bgp_scan, |
1377 | show_ip_bgp_scan_cmd, | |
1378 | "show ip bgp scan", | |
1379 | SHOW_STR | |
1380 | IP_STR | |
1381 | BGP_STR | |
1382 | "BGP scan status\n") | |
1383 | { | |
1384 | return show_ip_bgp_scan_tables (vty, 0); | |
1385 | } | |
1386 | ||
1387 | DEFUN (show_ip_bgp_scan_detail, | |
1388 | show_ip_bgp_scan_detail_cmd, | |
1389 | "show ip bgp scan detail", | |
1390 | SHOW_STR | |
1391 | IP_STR | |
1392 | BGP_STR | |
1393 | "BGP scan status\n" | |
1394 | "More detailed output\n") | |
1395 | { | |
1396 | return show_ip_bgp_scan_tables (vty, 1); | |
1397 | } | |
1398 | ||
718e3744 | 1399 | int |
1400 | bgp_config_write_scan_time (struct vty *vty) | |
1401 | { | |
1402 | if (bgp_scan_interval != BGP_SCAN_INTERVAL_DEFAULT) | |
1403 | vty_out (vty, " bgp scan-time %d%s", bgp_scan_interval, VTY_NEWLINE); | |
1404 | return CMD_SUCCESS; | |
1405 | } | |
1406 | ||
1407 | void | |
66e5cd87 | 1408 | bgp_scan_init (void) |
718e3744 | 1409 | { |
1410 | zlookup = zclient_new (); | |
1411 | zlookup->sock = -1; | |
718e3744 | 1412 | zlookup->t_connect = thread_add_event (master, zlookup_connect, zlookup, 0); |
1413 | ||
1414 | bgp_scan_interval = BGP_SCAN_INTERVAL_DEFAULT; | |
1415 | bgp_import_interval = BGP_IMPORT_INTERVAL_DEFAULT; | |
1416 | ||
64e580a7 PJ |
1417 | cache1_table[AFI_IP] = bgp_table_init (AFI_IP, SAFI_UNICAST); |
1418 | cache2_table[AFI_IP] = bgp_table_init (AFI_IP, SAFI_UNICAST); | |
5932020b | 1419 | bgp_nexthop_cache_table[AFI_IP] = cache1_table[AFI_IP]; |
718e3744 | 1420 | |
64e580a7 | 1421 | bgp_connected_table[AFI_IP] = bgp_table_init (AFI_IP, SAFI_UNICAST); |
718e3744 | 1422 | |
1423 | #ifdef HAVE_IPV6 | |
64e580a7 PJ |
1424 | cache1_table[AFI_IP6] = bgp_table_init (AFI_IP6, SAFI_UNICAST); |
1425 | cache2_table[AFI_IP6] = bgp_table_init (AFI_IP6, SAFI_UNICAST); | |
5932020b | 1426 | bgp_nexthop_cache_table[AFI_IP6] = cache1_table[AFI_IP6]; |
64e580a7 | 1427 | bgp_connected_table[AFI_IP6] = bgp_table_init (AFI_IP6, SAFI_UNICAST); |
718e3744 | 1428 | #endif /* HAVE_IPV6 */ |
1429 | ||
1430 | /* Make BGP scan thread. */ | |
5932020b | 1431 | bgp_scan_thread = thread_add_timer (master, bgp_scan_timer, |
1432 | NULL, bgp_scan_interval); | |
6cbbc3cc | 1433 | /* Make BGP import there. */ |
1434 | bgp_import_thread = thread_add_timer (master, bgp_import, NULL, 0); | |
718e3744 | 1435 | |
1436 | install_element (BGP_NODE, &bgp_scan_time_cmd); | |
1437 | install_element (BGP_NODE, &no_bgp_scan_time_cmd); | |
1438 | install_element (BGP_NODE, &no_bgp_scan_time_val_cmd); | |
1439 | install_element (VIEW_NODE, &show_ip_bgp_scan_cmd); | |
318f0d8a | 1440 | install_element (VIEW_NODE, &show_ip_bgp_scan_detail_cmd); |
62687ff1 | 1441 | install_element (RESTRICTED_NODE, &show_ip_bgp_scan_cmd); |
718e3744 | 1442 | install_element (ENABLE_NODE, &show_ip_bgp_scan_cmd); |
318f0d8a | 1443 | install_element (ENABLE_NODE, &show_ip_bgp_scan_detail_cmd); |
718e3744 | 1444 | } |
228da428 CC |
1445 | |
1446 | void | |
1447 | bgp_scan_finish (void) | |
1448 | { | |
6c88b44d CC |
1449 | /* Only the current one needs to be reset. */ |
1450 | bgp_nexthop_cache_reset (bgp_nexthop_cache_table[AFI_IP]); | |
1451 | ||
228da428 CC |
1452 | bgp_table_unlock (cache1_table[AFI_IP]); |
1453 | cache1_table[AFI_IP] = NULL; | |
1454 | ||
1455 | bgp_table_unlock (cache2_table[AFI_IP]); | |
1456 | cache2_table[AFI_IP] = NULL; | |
1457 | ||
1458 | bgp_table_unlock (bgp_connected_table[AFI_IP]); | |
1459 | bgp_connected_table[AFI_IP] = NULL; | |
1460 | ||
1461 | #ifdef HAVE_IPV6 | |
6c88b44d CC |
1462 | /* Only the current one needs to be reset. */ |
1463 | bgp_nexthop_cache_reset (bgp_nexthop_cache_table[AFI_IP6]); | |
1464 | ||
228da428 CC |
1465 | bgp_table_unlock (cache1_table[AFI_IP6]); |
1466 | cache1_table[AFI_IP6] = NULL; | |
1467 | ||
1468 | bgp_table_unlock (cache2_table[AFI_IP6]); | |
1469 | cache2_table[AFI_IP6] = NULL; | |
1470 | ||
1471 | bgp_table_unlock (bgp_connected_table[AFI_IP6]); | |
1472 | bgp_connected_table[AFI_IP6] = NULL; | |
1473 | #endif /* HAVE_IPV6 */ | |
1474 | } |