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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); | |
607 | addr->refcnt--; | |
608 | ||
609 | if (addr->refcnt == 0) | |
610 | { | |
611 | hash_release (bgp_address_hash, addr); | |
612 | XFREE (MTYPE_BGP_ADDR, addr); | |
613 | } | |
614 | } | |
615 | ||
718e3744 | 616 | \f |
5932020b | 617 | struct bgp_connected_ref |
718e3744 | 618 | { |
619 | unsigned int refcnt; | |
620 | }; | |
621 | ||
622 | void | |
623 | bgp_connected_add (struct connected *ifc) | |
624 | { | |
625 | struct prefix p; | |
626 | struct prefix *addr; | |
718e3744 | 627 | struct interface *ifp; |
628 | struct bgp_node *rn; | |
5932020b | 629 | struct bgp_connected_ref *bc; |
718e3744 | 630 | |
631 | ifp = ifc->ifp; | |
632 | ||
633 | if (! ifp) | |
634 | return; | |
635 | ||
636 | if (if_is_loopback (ifp)) | |
637 | return; | |
638 | ||
639 | addr = ifc->address; | |
718e3744 | 640 | |
641 | if (addr->family == AF_INET) | |
642 | { | |
e4529636 | 643 | PREFIX_COPY_IPV4(&p, CONNECTED_PREFIX(ifc)); |
718e3744 | 644 | apply_mask_ipv4 ((struct prefix_ipv4 *) &p); |
645 | ||
646 | if (prefix_ipv4_any ((struct prefix_ipv4 *) &p)) | |
647 | return; | |
648 | ||
10f9bf3f JBD |
649 | bgp_address_add (addr); |
650 | ||
5932020b | 651 | rn = bgp_node_get (bgp_connected_table[AFI_IP], (struct prefix *) &p); |
718e3744 | 652 | if (rn->info) |
653 | { | |
654 | bc = rn->info; | |
655 | bc->refcnt++; | |
656 | } | |
657 | else | |
658 | { | |
6c88b44d | 659 | bc = XCALLOC (MTYPE_BGP_CONN, sizeof (struct bgp_connected_ref)); |
718e3744 | 660 | bc->refcnt = 1; |
661 | rn->info = bc; | |
662 | } | |
663 | } | |
664 | #ifdef HAVE_IPV6 | |
e4529636 | 665 | else if (addr->family == AF_INET6) |
718e3744 | 666 | { |
e4529636 | 667 | PREFIX_COPY_IPV6(&p, CONNECTED_PREFIX(ifc)); |
718e3744 | 668 | apply_mask_ipv6 ((struct prefix_ipv6 *) &p); |
669 | ||
670 | if (IN6_IS_ADDR_UNSPECIFIED (&p.u.prefix6)) | |
671 | return; | |
672 | ||
673 | if (IN6_IS_ADDR_LINKLOCAL (&p.u.prefix6)) | |
674 | return; | |
675 | ||
5932020b | 676 | rn = bgp_node_get (bgp_connected_table[AFI_IP6], (struct prefix *) &p); |
718e3744 | 677 | if (rn->info) |
678 | { | |
679 | bc = rn->info; | |
680 | bc->refcnt++; | |
681 | } | |
682 | else | |
683 | { | |
6c88b44d | 684 | bc = XCALLOC (MTYPE_BGP_CONN, sizeof (struct bgp_connected_ref)); |
718e3744 | 685 | bc->refcnt = 1; |
686 | rn->info = bc; | |
687 | } | |
688 | } | |
689 | #endif /* HAVE_IPV6 */ | |
690 | } | |
691 | ||
692 | void | |
693 | bgp_connected_delete (struct connected *ifc) | |
694 | { | |
695 | struct prefix p; | |
696 | struct prefix *addr; | |
718e3744 | 697 | struct interface *ifp; |
698 | struct bgp_node *rn; | |
5932020b | 699 | struct bgp_connected_ref *bc; |
718e3744 | 700 | |
701 | ifp = ifc->ifp; | |
702 | ||
703 | if (if_is_loopback (ifp)) | |
704 | return; | |
705 | ||
706 | addr = ifc->address; | |
718e3744 | 707 | |
708 | if (addr->family == AF_INET) | |
709 | { | |
e4529636 | 710 | PREFIX_COPY_IPV4(&p, CONNECTED_PREFIX(ifc)); |
718e3744 | 711 | apply_mask_ipv4 ((struct prefix_ipv4 *) &p); |
712 | ||
713 | if (prefix_ipv4_any ((struct prefix_ipv4 *) &p)) | |
714 | return; | |
715 | ||
10f9bf3f JBD |
716 | bgp_address_del (addr); |
717 | ||
5932020b | 718 | rn = bgp_node_lookup (bgp_connected_table[AFI_IP], &p); |
718e3744 | 719 | if (! rn) |
720 | return; | |
721 | ||
722 | bc = rn->info; | |
723 | bc->refcnt--; | |
724 | if (bc->refcnt == 0) | |
725 | { | |
6c88b44d | 726 | XFREE (MTYPE_BGP_CONN, bc); |
718e3744 | 727 | rn->info = NULL; |
728 | } | |
729 | bgp_unlock_node (rn); | |
730 | bgp_unlock_node (rn); | |
731 | } | |
732 | #ifdef HAVE_IPV6 | |
733 | else if (addr->family == AF_INET6) | |
734 | { | |
e4529636 | 735 | PREFIX_COPY_IPV6(&p, CONNECTED_PREFIX(ifc)); |
718e3744 | 736 | apply_mask_ipv6 ((struct prefix_ipv6 *) &p); |
737 | ||
738 | if (IN6_IS_ADDR_UNSPECIFIED (&p.u.prefix6)) | |
739 | return; | |
740 | ||
741 | if (IN6_IS_ADDR_LINKLOCAL (&p.u.prefix6)) | |
742 | return; | |
743 | ||
5932020b | 744 | rn = bgp_node_lookup (bgp_connected_table[AFI_IP6], (struct prefix *) &p); |
718e3744 | 745 | if (! rn) |
746 | return; | |
747 | ||
748 | bc = rn->info; | |
749 | bc->refcnt--; | |
750 | if (bc->refcnt == 0) | |
751 | { | |
6c88b44d | 752 | XFREE (MTYPE_BGP_CONN, bc); |
718e3744 | 753 | rn->info = NULL; |
754 | } | |
755 | bgp_unlock_node (rn); | |
756 | bgp_unlock_node (rn); | |
757 | } | |
758 | #endif /* HAVE_IPV6 */ | |
759 | } | |
760 | ||
761 | int | |
10f9bf3f | 762 | bgp_nexthop_self (struct attr *attr) |
718e3744 | 763 | { |
10f9bf3f | 764 | struct bgp_addr tmp, *addr; |
718e3744 | 765 | |
10f9bf3f JBD |
766 | tmp.addr = attr->nexthop; |
767 | ||
768 | addr = hash_lookup (bgp_address_hash, &tmp); | |
769 | if (addr) | |
770 | return 1; | |
718e3744 | 771 | |
718e3744 | 772 | return 0; |
773 | } | |
774 | \f | |
94f2b392 | 775 | static struct bgp_nexthop_cache * |
66e5cd87 | 776 | zlookup_read (void) |
718e3744 | 777 | { |
778 | struct stream *s; | |
d3092e7f | 779 | uint16_t length; |
780 | u_char marker; | |
781 | u_char version; | |
782 | uint16_t command; | |
718e3744 | 783 | int nbytes; |
784 | struct in_addr raddr; | |
d3092e7f | 785 | uint32_t metric; |
718e3744 | 786 | int i; |
787 | u_char nexthop_num; | |
788 | struct nexthop *nexthop; | |
789 | struct bgp_nexthop_cache *bnc; | |
790 | ||
791 | s = zlookup->ibuf; | |
792 | stream_reset (s); | |
793 | ||
794 | nbytes = stream_read (s, zlookup->sock, 2); | |
795 | length = stream_getw (s); | |
796 | ||
797 | nbytes = stream_read (s, zlookup->sock, length - 2); | |
d3092e7f | 798 | marker = stream_getc (s); |
799 | version = stream_getc (s); | |
800 | ||
801 | if (version != ZSERV_VERSION || marker != ZEBRA_HEADER_MARKER) | |
802 | { | |
803 | zlog_err("%s: socket %d version mismatch, marker %d, version %d", | |
804 | __func__, zlookup->sock, marker, version); | |
805 | return NULL; | |
806 | } | |
807 | ||
808 | command = stream_getw (s); | |
809 | ||
718e3744 | 810 | raddr.s_addr = stream_get_ipv4 (s); |
811 | metric = stream_getl (s); | |
812 | nexthop_num = stream_getc (s); | |
813 | ||
814 | if (nexthop_num) | |
815 | { | |
816 | bnc = bnc_new (); | |
817 | bnc->valid = 1; | |
818 | bnc->metric = metric; | |
819 | bnc->nexthop_num = nexthop_num; | |
820 | ||
821 | for (i = 0; i < nexthop_num; i++) | |
822 | { | |
393deb9b | 823 | nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
718e3744 | 824 | nexthop->type = stream_getc (s); |
825 | switch (nexthop->type) | |
826 | { | |
827 | case ZEBRA_NEXTHOP_IPV4: | |
828 | nexthop->gate.ipv4.s_addr = stream_get_ipv4 (s); | |
829 | break; | |
830 | case ZEBRA_NEXTHOP_IFINDEX: | |
831 | case ZEBRA_NEXTHOP_IFNAME: | |
832 | nexthop->ifindex = stream_getl (s); | |
833 | break; | |
fa2b17e3 | 834 | default: |
835 | /* do nothing */ | |
836 | break; | |
718e3744 | 837 | } |
838 | bnc_nexthop_add (bnc, nexthop); | |
839 | } | |
840 | } | |
841 | else | |
842 | return NULL; | |
843 | ||
844 | return bnc; | |
845 | } | |
846 | ||
847 | struct bgp_nexthop_cache * | |
848 | zlookup_query (struct in_addr addr) | |
849 | { | |
850 | int ret; | |
851 | struct stream *s; | |
852 | ||
853 | /* Check socket. */ | |
854 | if (zlookup->sock < 0) | |
855 | return NULL; | |
856 | ||
857 | s = zlookup->obuf; | |
858 | stream_reset (s); | |
d3092e7f | 859 | zclient_create_header (s, ZEBRA_IPV4_NEXTHOP_LOOKUP); |
718e3744 | 860 | stream_put_in_addr (s, &addr); |
d3092e7f | 861 | |
862 | stream_putw_at (s, 0, stream_get_endp (s)); | |
863 | ||
864 | ret = writen (zlookup->sock, s->data, stream_get_endp (s)); | |
718e3744 | 865 | if (ret < 0) |
866 | { | |
867 | zlog_err ("can't write to zlookup->sock"); | |
868 | close (zlookup->sock); | |
869 | zlookup->sock = -1; | |
870 | return NULL; | |
871 | } | |
872 | if (ret == 0) | |
873 | { | |
874 | zlog_err ("zlookup->sock connection closed"); | |
875 | close (zlookup->sock); | |
876 | zlookup->sock = -1; | |
877 | return NULL; | |
878 | } | |
879 | ||
880 | return zlookup_read (); | |
881 | } | |
882 | ||
883 | #ifdef HAVE_IPV6 | |
94f2b392 | 884 | static struct bgp_nexthop_cache * |
66e5cd87 | 885 | zlookup_read_ipv6 (void) |
718e3744 | 886 | { |
887 | struct stream *s; | |
d3092e7f | 888 | uint16_t length; |
889 | u_char version, marker; | |
890 | uint16_t command; | |
718e3744 | 891 | int nbytes; |
892 | struct in6_addr raddr; | |
d3092e7f | 893 | uint32_t metric; |
718e3744 | 894 | int i; |
895 | u_char nexthop_num; | |
896 | struct nexthop *nexthop; | |
897 | struct bgp_nexthop_cache *bnc; | |
898 | ||
899 | s = zlookup->ibuf; | |
900 | stream_reset (s); | |
901 | ||
902 | nbytes = stream_read (s, zlookup->sock, 2); | |
903 | length = stream_getw (s); | |
904 | ||
905 | nbytes = stream_read (s, zlookup->sock, length - 2); | |
d3092e7f | 906 | marker = stream_getc (s); |
907 | version = stream_getc (s); | |
908 | ||
909 | if (version != ZSERV_VERSION || marker != ZEBRA_HEADER_MARKER) | |
910 | { | |
911 | zlog_err("%s: socket %d version mismatch, marker %d, version %d", | |
912 | __func__, zlookup->sock, marker, version); | |
913 | return NULL; | |
914 | } | |
915 | ||
916 | command = stream_getw (s); | |
917 | ||
718e3744 | 918 | stream_get (&raddr, s, 16); |
919 | ||
920 | metric = stream_getl (s); | |
921 | nexthop_num = stream_getc (s); | |
922 | ||
923 | if (nexthop_num) | |
924 | { | |
925 | bnc = bnc_new (); | |
926 | bnc->valid = 1; | |
927 | bnc->metric = metric; | |
928 | bnc->nexthop_num = nexthop_num; | |
929 | ||
930 | for (i = 0; i < nexthop_num; i++) | |
931 | { | |
393deb9b | 932 | nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
718e3744 | 933 | nexthop->type = stream_getc (s); |
934 | switch (nexthop->type) | |
935 | { | |
936 | case ZEBRA_NEXTHOP_IPV6: | |
937 | stream_get (&nexthop->gate.ipv6, s, 16); | |
938 | break; | |
939 | case ZEBRA_NEXTHOP_IPV6_IFINDEX: | |
940 | case ZEBRA_NEXTHOP_IPV6_IFNAME: | |
941 | stream_get (&nexthop->gate.ipv6, s, 16); | |
942 | nexthop->ifindex = stream_getl (s); | |
943 | break; | |
944 | case ZEBRA_NEXTHOP_IFINDEX: | |
945 | case ZEBRA_NEXTHOP_IFNAME: | |
946 | nexthop->ifindex = stream_getl (s); | |
947 | break; | |
fa2b17e3 | 948 | default: |
949 | /* do nothing */ | |
950 | break; | |
718e3744 | 951 | } |
952 | bnc_nexthop_add (bnc, nexthop); | |
953 | } | |
954 | } | |
955 | else | |
956 | return NULL; | |
957 | ||
958 | return bnc; | |
959 | } | |
960 | ||
961 | struct bgp_nexthop_cache * | |
962 | zlookup_query_ipv6 (struct in6_addr *addr) | |
963 | { | |
964 | int ret; | |
965 | struct stream *s; | |
966 | ||
967 | /* Check socket. */ | |
968 | if (zlookup->sock < 0) | |
969 | return NULL; | |
970 | ||
971 | s = zlookup->obuf; | |
972 | stream_reset (s); | |
d3092e7f | 973 | zclient_create_header (s, ZEBRA_IPV6_NEXTHOP_LOOKUP); |
718e3744 | 974 | stream_put (s, addr, 16); |
d3092e7f | 975 | stream_putw_at (s, 0, stream_get_endp (s)); |
976 | ||
977 | ret = writen (zlookup->sock, s->data, stream_get_endp (s)); | |
718e3744 | 978 | if (ret < 0) |
979 | { | |
980 | zlog_err ("can't write to zlookup->sock"); | |
981 | close (zlookup->sock); | |
982 | zlookup->sock = -1; | |
983 | return NULL; | |
984 | } | |
985 | if (ret == 0) | |
986 | { | |
987 | zlog_err ("zlookup->sock connection closed"); | |
988 | close (zlookup->sock); | |
989 | zlookup->sock = -1; | |
990 | return NULL; | |
991 | } | |
992 | ||
993 | return zlookup_read_ipv6 (); | |
994 | } | |
995 | #endif /* HAVE_IPV6 */ | |
996 | ||
94f2b392 | 997 | static int |
998 | bgp_import_check (struct prefix *p, u_int32_t *igpmetric, | |
999 | struct in_addr *igpnexthop) | |
718e3744 | 1000 | { |
1001 | struct stream *s; | |
1002 | int ret; | |
d3092e7f | 1003 | u_int16_t length, command; |
1004 | u_char version, marker; | |
718e3744 | 1005 | int nbytes; |
1006 | struct in_addr addr; | |
1007 | struct in_addr nexthop; | |
1008 | u_int32_t metric = 0; | |
1009 | u_char nexthop_num; | |
1010 | u_char nexthop_type; | |
1011 | ||
1012 | /* If lookup connection is not available return valid. */ | |
1013 | if (zlookup->sock < 0) | |
1014 | { | |
1015 | if (igpmetric) | |
1016 | *igpmetric = 0; | |
1017 | return 1; | |
1018 | } | |
1019 | ||
1020 | /* Send query to the lookup connection */ | |
1021 | s = zlookup->obuf; | |
1022 | stream_reset (s); | |
d3092e7f | 1023 | zclient_create_header (s, ZEBRA_IPV4_IMPORT_LOOKUP); |
1024 | ||
718e3744 | 1025 | stream_putc (s, p->prefixlen); |
1026 | stream_put_in_addr (s, &p->u.prefix4); | |
d3092e7f | 1027 | |
1028 | stream_putw_at (s, 0, stream_get_endp (s)); | |
1029 | ||
718e3744 | 1030 | /* Write the packet. */ |
d3092e7f | 1031 | ret = writen (zlookup->sock, s->data, stream_get_endp (s)); |
718e3744 | 1032 | |
1033 | if (ret < 0) | |
1034 | { | |
1035 | zlog_err ("can't write to zlookup->sock"); | |
1036 | close (zlookup->sock); | |
1037 | zlookup->sock = -1; | |
1038 | return 1; | |
1039 | } | |
1040 | if (ret == 0) | |
1041 | { | |
1042 | zlog_err ("zlookup->sock connection closed"); | |
1043 | close (zlookup->sock); | |
1044 | zlookup->sock = -1; | |
1045 | return 1; | |
1046 | } | |
1047 | ||
1048 | /* Get result. */ | |
1049 | stream_reset (s); | |
1050 | ||
1051 | /* Fetch length. */ | |
1052 | nbytes = stream_read (s, zlookup->sock, 2); | |
1053 | length = stream_getw (s); | |
1054 | ||
1055 | /* Fetch whole data. */ | |
1056 | nbytes = stream_read (s, zlookup->sock, length - 2); | |
d3092e7f | 1057 | marker = stream_getc (s); |
1058 | version = stream_getc (s); | |
1059 | ||
1060 | if (version != ZSERV_VERSION || marker != ZEBRA_HEADER_MARKER) | |
1061 | { | |
1062 | zlog_err("%s: socket %d version mismatch, marker %d, version %d", | |
1063 | __func__, zlookup->sock, marker, version); | |
1064 | return 0; | |
1065 | } | |
1066 | ||
1067 | command = stream_getw (s); | |
1068 | ||
718e3744 | 1069 | addr.s_addr = stream_get_ipv4 (s); |
1070 | metric = stream_getl (s); | |
1071 | nexthop_num = stream_getc (s); | |
1072 | ||
1073 | /* Set IGP metric value. */ | |
1074 | if (igpmetric) | |
1075 | *igpmetric = metric; | |
1076 | ||
1077 | /* If there is nexthop then this is active route. */ | |
1078 | if (nexthop_num) | |
1079 | { | |
1080 | nexthop.s_addr = 0; | |
1081 | nexthop_type = stream_getc (s); | |
1082 | if (nexthop_type == ZEBRA_NEXTHOP_IPV4) | |
1083 | { | |
1084 | nexthop.s_addr = stream_get_ipv4 (s); | |
1085 | if (igpnexthop) | |
1086 | *igpnexthop = nexthop; | |
1087 | } | |
1088 | else | |
1089 | *igpnexthop = nexthop; | |
1090 | ||
1091 | return 1; | |
1092 | } | |
1093 | else | |
1094 | return 0; | |
1095 | } | |
1096 | ||
1097 | /* Scan all configured BGP route then check the route exists in IGP or | |
1098 | not. */ | |
94f2b392 | 1099 | static int |
718e3744 | 1100 | bgp_import (struct thread *t) |
1101 | { | |
1102 | struct bgp *bgp; | |
1103 | struct bgp_node *rn; | |
1104 | struct bgp_static *bgp_static; | |
1eb8ef25 | 1105 | struct listnode *node, *nnode; |
718e3744 | 1106 | int valid; |
1107 | u_int32_t metric; | |
1108 | struct in_addr nexthop; | |
1109 | afi_t afi; | |
1110 | safi_t safi; | |
1111 | ||
1112 | bgp_import_thread = | |
1113 | thread_add_timer (master, bgp_import, NULL, bgp_import_interval); | |
1114 | ||
f418446b | 1115 | if (BGP_DEBUG (events, EVENTS)) |
1116 | zlog_debug ("Import timer expired."); | |
718e3744 | 1117 | |
1eb8ef25 | 1118 | for (ALL_LIST_ELEMENTS (bm->bgp, node, nnode, bgp)) |
6cbbc3cc | 1119 | { |
1120 | for (afi = AFI_IP; afi < AFI_MAX; afi++) | |
1121 | for (safi = SAFI_UNICAST; safi < SAFI_MPLS_VPN; safi++) | |
1122 | for (rn = bgp_table_top (bgp->route[afi][safi]); rn; | |
1123 | rn = bgp_route_next (rn)) | |
1124 | if ((bgp_static = rn->info) != NULL) | |
718e3744 | 1125 | { |
6cbbc3cc | 1126 | if (bgp_static->backdoor) |
1127 | continue; | |
718e3744 | 1128 | |
6cbbc3cc | 1129 | valid = bgp_static->valid; |
1130 | metric = bgp_static->igpmetric; | |
1131 | nexthop = bgp_static->igpnexthop; | |
1132 | ||
1133 | if (bgp_flag_check (bgp, BGP_FLAG_IMPORT_CHECK) | |
1134 | && afi == AFI_IP && safi == SAFI_UNICAST) | |
1135 | bgp_static->valid = bgp_import_check (&rn->p, &bgp_static->igpmetric, | |
1136 | &bgp_static->igpnexthop); | |
718e3744 | 1137 | else |
6cbbc3cc | 1138 | { |
1139 | bgp_static->valid = 1; | |
1140 | bgp_static->igpmetric = 0; | |
1141 | bgp_static->igpnexthop.s_addr = 0; | |
1142 | } | |
1143 | ||
1144 | if (bgp_static->valid != valid) | |
1145 | { | |
1146 | if (bgp_static->valid) | |
1147 | bgp_static_update (bgp, &rn->p, bgp_static, afi, safi); | |
1148 | else | |
1149 | bgp_static_withdraw (bgp, &rn->p, afi, safi); | |
1150 | } | |
1151 | else if (bgp_static->valid) | |
1152 | { | |
1153 | if (bgp_static->igpmetric != metric | |
1154 | || bgp_static->igpnexthop.s_addr != nexthop.s_addr | |
1155 | || bgp_static->rmap.name) | |
1156 | bgp_static_update (bgp, &rn->p, bgp_static, afi, safi); | |
1157 | } | |
718e3744 | 1158 | } |
6cbbc3cc | 1159 | } |
718e3744 | 1160 | return 0; |
1161 | } | |
1162 | ||
1163 | /* Connect to zebra for nexthop lookup. */ | |
94f2b392 | 1164 | static int |
718e3744 | 1165 | zlookup_connect (struct thread *t) |
1166 | { | |
1167 | struct zclient *zlookup; | |
1168 | ||
1169 | zlookup = THREAD_ARG (t); | |
1170 | zlookup->t_connect = NULL; | |
1171 | ||
1172 | if (zlookup->sock != -1) | |
1173 | return 0; | |
1174 | ||
b5114685 | 1175 | if (zclient_socket_connect (zlookup) < 0) |
718e3744 | 1176 | return -1; |
1177 | ||
718e3744 | 1178 | return 0; |
1179 | } | |
1180 | ||
1181 | /* Check specified multiaccess next-hop. */ | |
1182 | int | |
1183 | bgp_multiaccess_check_v4 (struct in_addr nexthop, char *peer) | |
1184 | { | |
1185 | struct bgp_node *rn1; | |
1186 | struct bgp_node *rn2; | |
1187 | struct prefix p1; | |
1188 | struct prefix p2; | |
1189 | struct in_addr addr; | |
1190 | int ret; | |
1191 | ||
1192 | ret = inet_aton (peer, &addr); | |
1193 | if (! ret) | |
1194 | return 0; | |
1195 | ||
1196 | memset (&p1, 0, sizeof (struct prefix)); | |
1197 | p1.family = AF_INET; | |
1198 | p1.prefixlen = IPV4_MAX_BITLEN; | |
1199 | p1.u.prefix4 = nexthop; | |
1200 | memset (&p2, 0, sizeof (struct prefix)); | |
1201 | p2.family = AF_INET; | |
1202 | p2.prefixlen = IPV4_MAX_BITLEN; | |
1203 | p2.u.prefix4 = addr; | |
1204 | ||
1205 | /* If bgp scan is not enabled, return invalid. */ | |
1206 | if (zlookup->sock < 0) | |
1207 | return 0; | |
1208 | ||
5932020b | 1209 | rn1 = bgp_node_match (bgp_connected_table[AFI_IP], &p1); |
718e3744 | 1210 | if (! rn1) |
1211 | return 0; | |
6c88b44d | 1212 | bgp_unlock_node (rn1); |
718e3744 | 1213 | |
5932020b | 1214 | rn2 = bgp_node_match (bgp_connected_table[AFI_IP], &p2); |
718e3744 | 1215 | if (! rn2) |
1216 | return 0; | |
6c88b44d | 1217 | bgp_unlock_node (rn2); |
718e3744 | 1218 | |
6c88b44d CC |
1219 | /* This is safe, even with above unlocks, since we are just |
1220 | comparing pointers to the objects, not the objects themselves. */ | |
718e3744 | 1221 | if (rn1 == rn2) |
1222 | return 1; | |
1223 | ||
1224 | return 0; | |
1225 | } | |
1226 | \f | |
1227 | DEFUN (bgp_scan_time, | |
1228 | bgp_scan_time_cmd, | |
1229 | "bgp scan-time <5-60>", | |
1230 | "BGP specific commands\n" | |
1231 | "Configure background scanner interval\n" | |
1232 | "Scanner interval (seconds)\n") | |
1233 | { | |
1234 | bgp_scan_interval = atoi (argv[0]); | |
1235 | ||
1236 | if (bgp_scan_thread) | |
1237 | { | |
1238 | thread_cancel (bgp_scan_thread); | |
1239 | bgp_scan_thread = | |
5932020b | 1240 | thread_add_timer (master, bgp_scan_timer, NULL, bgp_scan_interval); |
718e3744 | 1241 | } |
1242 | ||
1243 | return CMD_SUCCESS; | |
1244 | } | |
1245 | ||
1246 | DEFUN (no_bgp_scan_time, | |
1247 | no_bgp_scan_time_cmd, | |
1248 | "no bgp scan-time", | |
1249 | NO_STR | |
1250 | "BGP specific commands\n" | |
1251 | "Configure background scanner interval\n") | |
1252 | { | |
1253 | bgp_scan_interval = BGP_SCAN_INTERVAL_DEFAULT; | |
1254 | ||
1255 | if (bgp_scan_thread) | |
1256 | { | |
1257 | thread_cancel (bgp_scan_thread); | |
1258 | bgp_scan_thread = | |
5932020b | 1259 | thread_add_timer (master, bgp_scan_timer, NULL, bgp_scan_interval); |
718e3744 | 1260 | } |
1261 | ||
1262 | return CMD_SUCCESS; | |
1263 | } | |
1264 | ||
1265 | ALIAS (no_bgp_scan_time, | |
1266 | no_bgp_scan_time_val_cmd, | |
1267 | "no bgp scan-time <5-60>", | |
1268 | NO_STR | |
1269 | "BGP specific commands\n" | |
1270 | "Configure background scanner interval\n" | |
1271 | "Scanner interval (seconds)\n") | |
1272 | ||
318f0d8a DO |
1273 | static int |
1274 | show_ip_bgp_scan_tables (struct vty *vty, const char detail) | |
718e3744 | 1275 | { |
1276 | struct bgp_node *rn; | |
1277 | struct bgp_nexthop_cache *bnc; | |
318f0d8a DO |
1278 | char buf[INET6_ADDRSTRLEN]; |
1279 | u_char i; | |
718e3744 | 1280 | |
1281 | if (bgp_scan_thread) | |
1282 | vty_out (vty, "BGP scan is running%s", VTY_NEWLINE); | |
1283 | else | |
1284 | vty_out (vty, "BGP scan is not running%s", VTY_NEWLINE); | |
1285 | vty_out (vty, "BGP scan interval is %d%s", bgp_scan_interval, VTY_NEWLINE); | |
1286 | ||
1287 | vty_out (vty, "Current BGP nexthop cache:%s", VTY_NEWLINE); | |
5932020b | 1288 | for (rn = bgp_table_top (bgp_nexthop_cache_table[AFI_IP]); rn; rn = bgp_route_next (rn)) |
718e3744 | 1289 | if ((bnc = rn->info) != NULL) |
1290 | { | |
1291 | if (bnc->valid) | |
318f0d8a | 1292 | { |
718e3744 | 1293 | vty_out (vty, " %s valid [IGP metric %d]%s", |
318f0d8a DO |
1294 | inet_ntop (AF_INET, &rn->p.u.prefix4, buf, INET6_ADDRSTRLEN), bnc->metric, VTY_NEWLINE); |
1295 | if (detail) | |
1296 | for (i = 0; i < bnc->nexthop_num; i++) | |
0e8032d6 DO |
1297 | switch (bnc->nexthop[i].type) |
1298 | { | |
1299 | case NEXTHOP_TYPE_IPV4: | |
1300 | vty_out (vty, " gate %s%s", inet_ntop (AF_INET, &bnc->nexthop[i].gate.ipv4, buf, INET6_ADDRSTRLEN), VTY_NEWLINE); | |
1301 | break; | |
1302 | case NEXTHOP_TYPE_IFINDEX: | |
1303 | vty_out (vty, " ifidx %u%s", bnc->nexthop[i].ifindex, VTY_NEWLINE); | |
1304 | break; | |
1305 | default: | |
1306 | vty_out (vty, " invalid nexthop type %u%s", bnc->nexthop[i].type, VTY_NEWLINE); | |
1307 | } | |
318f0d8a | 1308 | } |
718e3744 | 1309 | else |
1310 | vty_out (vty, " %s invalid%s", | |
318f0d8a | 1311 | inet_ntop (AF_INET, &rn->p.u.prefix4, buf, INET6_ADDRSTRLEN), VTY_NEWLINE); |
718e3744 | 1312 | } |
1313 | ||
1314 | #ifdef HAVE_IPV6 | |
1315 | { | |
5932020b | 1316 | for (rn = bgp_table_top (bgp_nexthop_cache_table[AFI_IP6]); |
1317 | rn; | |
1318 | rn = bgp_route_next (rn)) | |
718e3744 | 1319 | if ((bnc = rn->info) != NULL) |
1320 | { | |
1321 | if (bnc->valid) | |
318f0d8a | 1322 | { |
718e3744 | 1323 | vty_out (vty, " %s valid [IGP metric %d]%s", |
318f0d8a | 1324 | inet_ntop (AF_INET6, &rn->p.u.prefix6, buf, INET6_ADDRSTRLEN), |
718e3744 | 1325 | bnc->metric, VTY_NEWLINE); |
318f0d8a DO |
1326 | if (detail) |
1327 | for (i = 0; i < bnc->nexthop_num; i++) | |
0e8032d6 DO |
1328 | switch (bnc->nexthop[i].type) |
1329 | { | |
1330 | case NEXTHOP_TYPE_IPV6: | |
1331 | vty_out (vty, " gate %s%s", inet_ntop (AF_INET6, &bnc->nexthop[i].gate.ipv6, buf, INET6_ADDRSTRLEN), VTY_NEWLINE); | |
1332 | break; | |
1333 | case NEXTHOP_TYPE_IFINDEX: | |
1334 | vty_out (vty, " ifidx %u%s", bnc->nexthop[i].ifindex, VTY_NEWLINE); | |
1335 | break; | |
1336 | default: | |
1337 | vty_out (vty, " invalid nexthop type %u%s", bnc->nexthop[i].type, VTY_NEWLINE); | |
1338 | } | |
318f0d8a | 1339 | } |
718e3744 | 1340 | else |
1341 | vty_out (vty, " %s invalid%s", | |
318f0d8a | 1342 | inet_ntop (AF_INET6, &rn->p.u.prefix6, buf, INET6_ADDRSTRLEN), |
718e3744 | 1343 | VTY_NEWLINE); |
1344 | } | |
1345 | } | |
1346 | #endif /* HAVE_IPV6 */ | |
1347 | ||
1348 | vty_out (vty, "BGP connected route:%s", VTY_NEWLINE); | |
5932020b | 1349 | for (rn = bgp_table_top (bgp_connected_table[AFI_IP]); |
1350 | rn; | |
1351 | rn = bgp_route_next (rn)) | |
718e3744 | 1352 | if (rn->info != NULL) |
1353 | vty_out (vty, " %s/%d%s", inet_ntoa (rn->p.u.prefix4), rn->p.prefixlen, | |
1354 | VTY_NEWLINE); | |
1355 | ||
1356 | #ifdef HAVE_IPV6 | |
1357 | { | |
5932020b | 1358 | for (rn = bgp_table_top (bgp_connected_table[AFI_IP6]); |
1359 | rn; | |
1360 | rn = bgp_route_next (rn)) | |
718e3744 | 1361 | if (rn->info != NULL) |
1362 | vty_out (vty, " %s/%d%s", | |
318f0d8a | 1363 | inet_ntop (AF_INET6, &rn->p.u.prefix6, buf, INET6_ADDRSTRLEN), |
718e3744 | 1364 | rn->p.prefixlen, |
1365 | VTY_NEWLINE); | |
1366 | } | |
1367 | #endif /* HAVE_IPV6 */ | |
1368 | ||
1369 | return CMD_SUCCESS; | |
1370 | } | |
1371 | ||
318f0d8a DO |
1372 | DEFUN (show_ip_bgp_scan, |
1373 | show_ip_bgp_scan_cmd, | |
1374 | "show ip bgp scan", | |
1375 | SHOW_STR | |
1376 | IP_STR | |
1377 | BGP_STR | |
1378 | "BGP scan status\n") | |
1379 | { | |
1380 | return show_ip_bgp_scan_tables (vty, 0); | |
1381 | } | |
1382 | ||
1383 | DEFUN (show_ip_bgp_scan_detail, | |
1384 | show_ip_bgp_scan_detail_cmd, | |
1385 | "show ip bgp scan detail", | |
1386 | SHOW_STR | |
1387 | IP_STR | |
1388 | BGP_STR | |
1389 | "BGP scan status\n" | |
1390 | "More detailed output\n") | |
1391 | { | |
1392 | return show_ip_bgp_scan_tables (vty, 1); | |
1393 | } | |
1394 | ||
718e3744 | 1395 | int |
1396 | bgp_config_write_scan_time (struct vty *vty) | |
1397 | { | |
1398 | if (bgp_scan_interval != BGP_SCAN_INTERVAL_DEFAULT) | |
1399 | vty_out (vty, " bgp scan-time %d%s", bgp_scan_interval, VTY_NEWLINE); | |
1400 | return CMD_SUCCESS; | |
1401 | } | |
1402 | ||
1403 | void | |
66e5cd87 | 1404 | bgp_scan_init (void) |
718e3744 | 1405 | { |
1406 | zlookup = zclient_new (); | |
1407 | zlookup->sock = -1; | |
718e3744 | 1408 | zlookup->t_connect = thread_add_event (master, zlookup_connect, zlookup, 0); |
1409 | ||
1410 | bgp_scan_interval = BGP_SCAN_INTERVAL_DEFAULT; | |
1411 | bgp_import_interval = BGP_IMPORT_INTERVAL_DEFAULT; | |
1412 | ||
64e580a7 PJ |
1413 | cache1_table[AFI_IP] = bgp_table_init (AFI_IP, SAFI_UNICAST); |
1414 | cache2_table[AFI_IP] = bgp_table_init (AFI_IP, SAFI_UNICAST); | |
5932020b | 1415 | bgp_nexthop_cache_table[AFI_IP] = cache1_table[AFI_IP]; |
718e3744 | 1416 | |
64e580a7 | 1417 | bgp_connected_table[AFI_IP] = bgp_table_init (AFI_IP, SAFI_UNICAST); |
718e3744 | 1418 | |
1419 | #ifdef HAVE_IPV6 | |
64e580a7 PJ |
1420 | cache1_table[AFI_IP6] = bgp_table_init (AFI_IP6, SAFI_UNICAST); |
1421 | cache2_table[AFI_IP6] = bgp_table_init (AFI_IP6, SAFI_UNICAST); | |
5932020b | 1422 | bgp_nexthop_cache_table[AFI_IP6] = cache1_table[AFI_IP6]; |
64e580a7 | 1423 | bgp_connected_table[AFI_IP6] = bgp_table_init (AFI_IP6, SAFI_UNICAST); |
718e3744 | 1424 | #endif /* HAVE_IPV6 */ |
1425 | ||
1426 | /* Make BGP scan thread. */ | |
5932020b | 1427 | bgp_scan_thread = thread_add_timer (master, bgp_scan_timer, |
1428 | NULL, bgp_scan_interval); | |
6cbbc3cc | 1429 | /* Make BGP import there. */ |
1430 | bgp_import_thread = thread_add_timer (master, bgp_import, NULL, 0); | |
718e3744 | 1431 | |
1432 | install_element (BGP_NODE, &bgp_scan_time_cmd); | |
1433 | install_element (BGP_NODE, &no_bgp_scan_time_cmd); | |
1434 | install_element (BGP_NODE, &no_bgp_scan_time_val_cmd); | |
1435 | install_element (VIEW_NODE, &show_ip_bgp_scan_cmd); | |
318f0d8a | 1436 | install_element (VIEW_NODE, &show_ip_bgp_scan_detail_cmd); |
62687ff1 | 1437 | install_element (RESTRICTED_NODE, &show_ip_bgp_scan_cmd); |
718e3744 | 1438 | install_element (ENABLE_NODE, &show_ip_bgp_scan_cmd); |
318f0d8a | 1439 | install_element (ENABLE_NODE, &show_ip_bgp_scan_detail_cmd); |
718e3744 | 1440 | } |
228da428 CC |
1441 | |
1442 | void | |
1443 | bgp_scan_finish (void) | |
1444 | { | |
6c88b44d CC |
1445 | /* Only the current one needs to be reset. */ |
1446 | bgp_nexthop_cache_reset (bgp_nexthop_cache_table[AFI_IP]); | |
1447 | ||
228da428 CC |
1448 | bgp_table_unlock (cache1_table[AFI_IP]); |
1449 | cache1_table[AFI_IP] = NULL; | |
1450 | ||
1451 | bgp_table_unlock (cache2_table[AFI_IP]); | |
1452 | cache2_table[AFI_IP] = NULL; | |
1453 | ||
1454 | bgp_table_unlock (bgp_connected_table[AFI_IP]); | |
1455 | bgp_connected_table[AFI_IP] = NULL; | |
1456 | ||
1457 | #ifdef HAVE_IPV6 | |
6c88b44d CC |
1458 | /* Only the current one needs to be reset. */ |
1459 | bgp_nexthop_cache_reset (bgp_nexthop_cache_table[AFI_IP6]); | |
1460 | ||
228da428 CC |
1461 | bgp_table_unlock (cache1_table[AFI_IP6]); |
1462 | cache1_table[AFI_IP6] = NULL; | |
1463 | ||
1464 | bgp_table_unlock (cache2_table[AFI_IP6]); | |
1465 | cache2_table[AFI_IP6] = NULL; | |
1466 | ||
1467 | bgp_table_unlock (bgp_connected_table[AFI_IP6]); | |
1468 | bgp_connected_table[AFI_IP6] = NULL; | |
1469 | #endif /* HAVE_IPV6 */ | |
1470 | } |