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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; | |
bb97e462 CF |
125 | case ZEBRA_NEXTHOP_IPV4_IFINDEX: |
126 | if (! IPV4_ADDR_SAME (&next1->gate.ipv4, &next2->gate.ipv4) | |
127 | || next1->ifindex != next2->ifindex) | |
128 | return 0; | |
129 | break; | |
718e3744 | 130 | case ZEBRA_NEXTHOP_IFINDEX: |
131 | case ZEBRA_NEXTHOP_IFNAME: | |
132 | if (next1->ifindex != next2->ifindex) | |
133 | return 0; | |
134 | break; | |
135 | #ifdef HAVE_IPV6 | |
136 | case ZEBRA_NEXTHOP_IPV6: | |
137 | if (! IPV6_ADDR_SAME (&next1->gate.ipv6, &next2->gate.ipv6)) | |
138 | return 0; | |
139 | break; | |
140 | case ZEBRA_NEXTHOP_IPV6_IFINDEX: | |
141 | case ZEBRA_NEXTHOP_IPV6_IFNAME: | |
142 | if (! IPV6_ADDR_SAME (&next1->gate.ipv6, &next2->gate.ipv6)) | |
143 | return 0; | |
144 | if (next1->ifindex != next2->ifindex) | |
145 | return 0; | |
146 | break; | |
147 | #endif /* HAVE_IPV6 */ | |
fa2b17e3 | 148 | default: |
149 | /* do nothing */ | |
150 | break; | |
718e3744 | 151 | } |
152 | return 1; | |
153 | } | |
154 | ||
94f2b392 | 155 | static int |
8e80bdf2 | 156 | bgp_nexthop_cache_different (struct bgp_nexthop_cache *bnc1, |
718e3744 | 157 | struct bgp_nexthop_cache *bnc2) |
158 | { | |
159 | int i; | |
160 | struct nexthop *next1, *next2; | |
161 | ||
162 | if (bnc1->nexthop_num != bnc2->nexthop_num) | |
163 | return 1; | |
164 | ||
165 | next1 = bnc1->nexthop; | |
166 | next2 = bnc2->nexthop; | |
167 | ||
168 | for (i = 0; i < bnc1->nexthop_num; i++) | |
169 | { | |
170 | if (! bgp_nexthop_same (next1, next2)) | |
171 | return 1; | |
172 | ||
173 | next1 = next1->next; | |
174 | next2 = next2->next; | |
175 | } | |
176 | return 0; | |
177 | } | |
178 | ||
179 | /* If nexthop exists on connected network return 1. */ | |
180 | int | |
8e80bdf2 | 181 | bgp_nexthop_onlink (afi_t afi, struct attr *attr) |
718e3744 | 182 | { |
183 | struct bgp_node *rn; | |
fc98d16e PJ |
184 | |
185 | /* If zebra is not enabled return */ | |
186 | if (zlookup->sock < 0) | |
187 | return 1; | |
188 | ||
718e3744 | 189 | /* Lookup the address is onlink or not. */ |
190 | if (afi == AFI_IP) | |
191 | { | |
5932020b | 192 | rn = bgp_node_match_ipv4 (bgp_connected_table[AFI_IP], &attr->nexthop); |
718e3744 | 193 | if (rn) |
194 | { | |
195 | bgp_unlock_node (rn); | |
196 | return 1; | |
197 | } | |
198 | } | |
199 | #ifdef HAVE_IPV6 | |
200 | else if (afi == AFI_IP6) | |
201 | { | |
fb982c25 | 202 | if (attr->extra->mp_nexthop_len == 32) |
718e3744 | 203 | return 1; |
fb982c25 | 204 | else if (attr->extra->mp_nexthop_len == 16) |
718e3744 | 205 | { |
fb982c25 | 206 | if (IN6_IS_ADDR_LINKLOCAL (&attr->extra->mp_nexthop_global)) |
718e3744 | 207 | return 1; |
208 | ||
5932020b | 209 | rn = bgp_node_match_ipv6 (bgp_connected_table[AFI_IP6], |
fb982c25 | 210 | &attr->extra->mp_nexthop_global); |
718e3744 | 211 | if (rn) |
212 | { | |
213 | bgp_unlock_node (rn); | |
214 | return 1; | |
215 | } | |
216 | } | |
217 | } | |
218 | #endif /* HAVE_IPV6 */ | |
219 | return 0; | |
220 | } | |
221 | ||
222 | #ifdef HAVE_IPV6 | |
223 | /* Check specified next-hop is reachable or not. */ | |
94f2b392 | 224 | static int |
718e3744 | 225 | bgp_nexthop_lookup_ipv6 (struct peer *peer, struct bgp_info *ri, int *changed, |
226 | int *metricchanged) | |
227 | { | |
228 | struct bgp_node *rn; | |
229 | struct prefix p; | |
230 | struct bgp_nexthop_cache *bnc; | |
231 | struct attr *attr; | |
fc98d16e PJ |
232 | |
233 | /* If lookup is not enabled, return valid. */ | |
234 | if (zlookup->sock < 0) | |
235 | { | |
236 | if (ri->extra) | |
237 | ri->extra->igpmetric = 0; | |
238 | return 1; | |
239 | } | |
240 | ||
718e3744 | 241 | /* Only check IPv6 global address only nexthop. */ |
242 | attr = ri->attr; | |
243 | ||
fb982c25 PJ |
244 | if (attr->extra->mp_nexthop_len != 16 |
245 | || IN6_IS_ADDR_LINKLOCAL (&attr->extra->mp_nexthop_global)) | |
718e3744 | 246 | return 1; |
247 | ||
248 | memset (&p, 0, sizeof (struct prefix)); | |
249 | p.family = AF_INET6; | |
250 | p.prefixlen = IPV6_MAX_BITLEN; | |
fb982c25 | 251 | p.u.prefix6 = attr->extra->mp_nexthop_global; |
718e3744 | 252 | |
253 | /* IBGP or ebgp-multihop */ | |
5932020b | 254 | rn = bgp_node_get (bgp_nexthop_cache_table[AFI_IP6], &p); |
718e3744 | 255 | |
256 | if (rn->info) | |
257 | { | |
258 | bnc = rn->info; | |
259 | bgp_unlock_node (rn); | |
260 | } | |
261 | else | |
262 | { | |
b64bfc1c DO |
263 | if (NULL == (bnc = zlookup_query_ipv6 (&attr->extra->mp_nexthop_global))) |
264 | bnc = bnc_new (); | |
265 | else | |
718e3744 | 266 | { |
718e3744 | 267 | if (changed) |
268 | { | |
8e80bdf2 DO |
269 | struct bgp_table *old; |
270 | struct bgp_node *oldrn; | |
271 | ||
5932020b | 272 | if (bgp_nexthop_cache_table[AFI_IP6] == cache1_table[AFI_IP6]) |
273 | old = cache2_table[AFI_IP6]; | |
718e3744 | 274 | else |
5932020b | 275 | old = cache1_table[AFI_IP6]; |
718e3744 | 276 | |
277 | oldrn = bgp_node_lookup (old, &p); | |
278 | if (oldrn) | |
279 | { | |
8e80bdf2 | 280 | struct bgp_nexthop_cache *oldbnc = oldrn->info; |
718e3744 | 281 | |
8e80bdf2 | 282 | bnc->changed = bgp_nexthop_cache_different (bnc, oldbnc); |
718e3744 | 283 | |
284 | if (bnc->metric != oldbnc->metric) | |
285 | bnc->metricchanged = 1; | |
6c88b44d CC |
286 | |
287 | bgp_unlock_node (oldrn); | |
718e3744 | 288 | } |
289 | } | |
290 | } | |
718e3744 | 291 | rn->info = bnc; |
292 | } | |
293 | ||
294 | if (changed) | |
295 | *changed = bnc->changed; | |
296 | ||
297 | if (metricchanged) | |
298 | *metricchanged = bnc->metricchanged; | |
299 | ||
fb982c25 PJ |
300 | if (bnc->valid && bnc->metric) |
301 | (bgp_info_extra_get (ri))->igpmetric = bnc->metric; | |
302 | else if (ri->extra) | |
303 | ri->extra->igpmetric = 0; | |
718e3744 | 304 | |
305 | return bnc->valid; | |
306 | } | |
307 | #endif /* HAVE_IPV6 */ | |
308 | ||
309 | /* Check specified next-hop is reachable or not. */ | |
310 | int | |
311 | bgp_nexthop_lookup (afi_t afi, struct peer *peer, struct bgp_info *ri, | |
312 | int *changed, int *metricchanged) | |
313 | { | |
314 | struct bgp_node *rn; | |
315 | struct prefix p; | |
316 | struct bgp_nexthop_cache *bnc; | |
317 | struct in_addr addr; | |
fc98d16e PJ |
318 | |
319 | /* If lookup is not enabled, return valid. */ | |
320 | if (zlookup->sock < 0) | |
321 | { | |
322 | if (ri->extra) | |
323 | ri->extra->igpmetric = 0; | |
324 | return 1; | |
325 | } | |
326 | ||
718e3744 | 327 | #ifdef HAVE_IPV6 |
328 | if (afi == AFI_IP6) | |
329 | return bgp_nexthop_lookup_ipv6 (peer, ri, changed, metricchanged); | |
330 | #endif /* HAVE_IPV6 */ | |
331 | ||
332 | addr = ri->attr->nexthop; | |
333 | ||
334 | memset (&p, 0, sizeof (struct prefix)); | |
335 | p.family = AF_INET; | |
336 | p.prefixlen = IPV4_MAX_BITLEN; | |
337 | p.u.prefix4 = addr; | |
338 | ||
339 | /* IBGP or ebgp-multihop */ | |
5932020b | 340 | rn = bgp_node_get (bgp_nexthop_cache_table[AFI_IP], &p); |
718e3744 | 341 | |
342 | if (rn->info) | |
343 | { | |
344 | bnc = rn->info; | |
345 | bgp_unlock_node (rn); | |
346 | } | |
347 | else | |
348 | { | |
b64bfc1c DO |
349 | if (NULL == (bnc = zlookup_query (addr))) |
350 | bnc = bnc_new (); | |
351 | else | |
718e3744 | 352 | { |
718e3744 | 353 | if (changed) |
354 | { | |
8e80bdf2 DO |
355 | struct bgp_table *old; |
356 | struct bgp_node *oldrn; | |
357 | ||
5932020b | 358 | if (bgp_nexthop_cache_table[AFI_IP] == cache1_table[AFI_IP]) |
359 | old = cache2_table[AFI_IP]; | |
718e3744 | 360 | else |
5932020b | 361 | old = cache1_table[AFI_IP]; |
718e3744 | 362 | |
363 | oldrn = bgp_node_lookup (old, &p); | |
364 | if (oldrn) | |
365 | { | |
8e80bdf2 | 366 | struct bgp_nexthop_cache *oldbnc = oldrn->info; |
718e3744 | 367 | |
8e80bdf2 | 368 | bnc->changed = bgp_nexthop_cache_different (bnc, oldbnc); |
718e3744 | 369 | |
370 | if (bnc->metric != oldbnc->metric) | |
371 | bnc->metricchanged = 1; | |
6c88b44d CC |
372 | |
373 | bgp_unlock_node (oldrn); | |
718e3744 | 374 | } |
375 | } | |
376 | } | |
718e3744 | 377 | rn->info = bnc; |
378 | } | |
379 | ||
380 | if (changed) | |
381 | *changed = bnc->changed; | |
382 | ||
383 | if (metricchanged) | |
384 | *metricchanged = bnc->metricchanged; | |
385 | ||
fb982c25 PJ |
386 | if (bnc->valid && bnc->metric) |
387 | (bgp_info_extra_get(ri))->igpmetric = bnc->metric; | |
388 | else if (ri->extra) | |
389 | ri->extra->igpmetric = 0; | |
718e3744 | 390 | |
391 | return bnc->valid; | |
392 | } | |
393 | ||
394 | /* Reset and free all BGP nexthop cache. */ | |
94f2b392 | 395 | static void |
718e3744 | 396 | bgp_nexthop_cache_reset (struct bgp_table *table) |
397 | { | |
398 | struct bgp_node *rn; | |
399 | struct bgp_nexthop_cache *bnc; | |
400 | ||
401 | for (rn = bgp_table_top (table); rn; rn = bgp_route_next (rn)) | |
402 | if ((bnc = rn->info) != NULL) | |
403 | { | |
404 | bnc_free (bnc); | |
405 | rn->info = NULL; | |
406 | bgp_unlock_node (rn); | |
407 | } | |
408 | } | |
409 | ||
94f2b392 | 410 | static void |
5932020b | 411 | bgp_scan (afi_t afi, safi_t safi) |
718e3744 | 412 | { |
413 | struct bgp_node *rn; | |
414 | struct bgp *bgp; | |
415 | struct bgp_info *bi; | |
416 | struct bgp_info *next; | |
417 | struct peer *peer; | |
1eb8ef25 | 418 | struct listnode *node, *nnode; |
718e3744 | 419 | int valid; |
420 | int current; | |
421 | int changed; | |
422 | int metricchanged; | |
423 | ||
424 | /* Change cache. */ | |
5932020b | 425 | if (bgp_nexthop_cache_table[afi] == cache1_table[afi]) |
426 | bgp_nexthop_cache_table[afi] = cache2_table[afi]; | |
718e3744 | 427 | else |
5932020b | 428 | bgp_nexthop_cache_table[afi] = cache1_table[afi]; |
718e3744 | 429 | |
430 | /* Get default bgp. */ | |
431 | bgp = bgp_get_default (); | |
432 | if (bgp == NULL) | |
433 | return; | |
434 | ||
435 | /* Maximum prefix check */ | |
1eb8ef25 | 436 | for (ALL_LIST_ELEMENTS (bgp->peer, node, nnode, peer)) |
718e3744 | 437 | { |
438 | if (peer->status != Established) | |
439 | continue; | |
440 | ||
5932020b | 441 | if (peer->afc[afi][SAFI_UNICAST]) |
442 | bgp_maximum_prefix_overflow (peer, afi, SAFI_UNICAST, 1); | |
443 | if (peer->afc[afi][SAFI_MULTICAST]) | |
444 | bgp_maximum_prefix_overflow (peer, afi, SAFI_MULTICAST, 1); | |
445 | if (peer->afc[afi][SAFI_MPLS_VPN]) | |
446 | bgp_maximum_prefix_overflow (peer, afi, SAFI_MPLS_VPN, 1); | |
718e3744 | 447 | } |
448 | ||
5932020b | 449 | for (rn = bgp_table_top (bgp->rib[afi][SAFI_UNICAST]); rn; |
718e3744 | 450 | rn = bgp_route_next (rn)) |
451 | { | |
452 | for (bi = rn->info; bi; bi = next) | |
453 | { | |
454 | next = bi->next; | |
455 | ||
456 | if (bi->type == ZEBRA_ROUTE_BGP && bi->sub_type == BGP_ROUTE_NORMAL) | |
457 | { | |
458 | changed = 0; | |
459 | metricchanged = 0; | |
460 | ||
a0f6ce5b CF |
461 | if (bi->peer->sort == BGP_PEER_EBGP && bi->peer->ttl == 1 |
462 | && !CHECK_FLAG(bi->peer->flags, PEER_FLAG_DISABLE_CONNECTED_CHECK)) | |
8e80bdf2 | 463 | valid = bgp_nexthop_onlink (afi, bi->attr); |
718e3744 | 464 | else |
5932020b | 465 | valid = bgp_nexthop_lookup (afi, bi->peer, bi, |
718e3744 | 466 | &changed, &metricchanged); |
467 | ||
468 | current = CHECK_FLAG (bi->flags, BGP_INFO_VALID) ? 1 : 0; | |
469 | ||
470 | if (changed) | |
471 | SET_FLAG (bi->flags, BGP_INFO_IGP_CHANGED); | |
472 | else | |
473 | UNSET_FLAG (bi->flags, BGP_INFO_IGP_CHANGED); | |
474 | ||
475 | if (valid != current) | |
476 | { | |
477 | if (CHECK_FLAG (bi->flags, BGP_INFO_VALID)) | |
478 | { | |
479 | bgp_aggregate_decrement (bgp, &rn->p, bi, | |
5932020b | 480 | afi, SAFI_UNICAST); |
1a392d46 | 481 | bgp_info_unset_flag (rn, bi, BGP_INFO_VALID); |
718e3744 | 482 | } |
483 | else | |
484 | { | |
1a392d46 | 485 | bgp_info_set_flag (rn, bi, BGP_INFO_VALID); |
718e3744 | 486 | bgp_aggregate_increment (bgp, &rn->p, bi, |
5932020b | 487 | afi, SAFI_UNICAST); |
718e3744 | 488 | } |
489 | } | |
490 | ||
5932020b | 491 | if (CHECK_FLAG (bgp->af_flags[afi][SAFI_UNICAST], |
718e3744 | 492 | BGP_CONFIG_DAMPENING) |
fb982c25 | 493 | && bi->extra && bi->extra->damp_info ) |
5932020b | 494 | if (bgp_damp_scan (bi, afi, SAFI_UNICAST)) |
718e3744 | 495 | bgp_aggregate_increment (bgp, &rn->p, bi, |
5932020b | 496 | afi, SAFI_UNICAST); |
718e3744 | 497 | } |
498 | } | |
5932020b | 499 | bgp_process (bgp, rn, afi, SAFI_UNICAST); |
718e3744 | 500 | } |
501 | ||
502 | /* Flash old cache. */ | |
5932020b | 503 | if (bgp_nexthop_cache_table[afi] == cache1_table[afi]) |
504 | bgp_nexthop_cache_reset (cache2_table[afi]); | |
718e3744 | 505 | else |
5932020b | 506 | bgp_nexthop_cache_reset (cache1_table[afi]); |
f418446b | 507 | |
508 | if (BGP_DEBUG (events, EVENTS)) | |
509 | { | |
510 | if (afi == AFI_IP) | |
511 | zlog_debug ("scanning IPv4 Unicast routing tables"); | |
512 | else if (afi == AFI_IP6) | |
513 | zlog_debug ("scanning IPv6 Unicast routing tables"); | |
514 | } | |
dcab1bb8 CF |
515 | |
516 | /* Reevaluate default-originate route-maps and announce/withdraw | |
517 | * default route if neccesary. */ | |
518 | for (ALL_LIST_ELEMENTS (bgp->peer, node, nnode, peer)) | |
519 | { | |
520 | if (peer->status == Established | |
521 | && CHECK_FLAG(peer->af_flags[afi][safi], PEER_FLAG_DEFAULT_ORIGINATE) | |
522 | && peer->default_rmap[afi][safi].name) | |
523 | bgp_default_originate (peer, afi, safi, 0); | |
524 | } | |
718e3744 | 525 | } |
718e3744 | 526 | |
527 | /* BGP scan thread. This thread check nexthop reachability. */ | |
94f2b392 | 528 | static int |
5932020b | 529 | bgp_scan_timer (struct thread *t) |
718e3744 | 530 | { |
531 | bgp_scan_thread = | |
5932020b | 532 | thread_add_timer (master, bgp_scan_timer, NULL, bgp_scan_interval); |
718e3744 | 533 | |
f418446b | 534 | if (BGP_DEBUG (events, EVENTS)) |
478ba054 | 535 | zlog_debug ("Performing BGP general scanning"); |
718e3744 | 536 | |
5932020b | 537 | bgp_scan (AFI_IP, SAFI_UNICAST); |
718e3744 | 538 | |
539 | #ifdef HAVE_IPV6 | |
5932020b | 540 | bgp_scan (AFI_IP6, SAFI_UNICAST); |
718e3744 | 541 | #endif /* HAVE_IPV6 */ |
542 | ||
543 | return 0; | |
544 | } | |
10f9bf3f JBD |
545 | |
546 | /* BGP own address structure */ | |
547 | struct bgp_addr | |
548 | { | |
549 | struct in_addr addr; | |
550 | int refcnt; | |
551 | }; | |
552 | ||
553 | static struct hash *bgp_address_hash; | |
554 | ||
555 | static void * | |
556 | bgp_address_hash_alloc (void *p) | |
557 | { | |
558 | struct in_addr *val = p; | |
559 | struct bgp_addr *addr; | |
560 | ||
561 | addr = XMALLOC (MTYPE_BGP_ADDR, sizeof (struct bgp_addr)); | |
562 | addr->refcnt = 0; | |
563 | addr->addr.s_addr = val->s_addr; | |
564 | ||
565 | return addr; | |
566 | } | |
567 | ||
568 | static unsigned int | |
569 | bgp_address_hash_key_make (void *p) | |
570 | { | |
571 | const struct bgp_addr *addr = p; | |
572 | ||
573 | return jhash_1word(addr->addr.s_addr, 0); | |
574 | } | |
575 | ||
576 | static int | |
577 | bgp_address_hash_cmp (const void *p1, const void *p2) | |
578 | { | |
579 | const struct bgp_addr *addr1 = p1; | |
580 | const struct bgp_addr *addr2 = p2; | |
581 | ||
582 | return addr1->addr.s_addr == addr2->addr.s_addr; | |
583 | } | |
584 | ||
585 | void | |
586 | bgp_address_init (void) | |
587 | { | |
588 | bgp_address_hash = hash_create (bgp_address_hash_key_make, | |
589 | bgp_address_hash_cmp); | |
590 | } | |
591 | ||
592 | static void | |
593 | bgp_address_add (struct prefix *p) | |
594 | { | |
595 | struct bgp_addr tmp; | |
596 | struct bgp_addr *addr; | |
597 | ||
598 | tmp.addr = p->u.prefix4; | |
599 | ||
600 | addr = hash_get (bgp_address_hash, &tmp, bgp_address_hash_alloc); | |
601 | addr->refcnt++; | |
602 | } | |
603 | ||
604 | static void | |
605 | bgp_address_del (struct prefix *p) | |
606 | { | |
607 | struct bgp_addr tmp; | |
608 | struct bgp_addr *addr; | |
609 | ||
610 | tmp.addr = p->u.prefix4; | |
611 | ||
612 | addr = hash_lookup (bgp_address_hash, &tmp); | |
9e47abd8 RG |
613 | /* may have been deleted earlier by bgp_interface_down() */ |
614 | if (addr == NULL) | |
615 | return; | |
616 | ||
10f9bf3f JBD |
617 | addr->refcnt--; |
618 | ||
619 | if (addr->refcnt == 0) | |
620 | { | |
621 | hash_release (bgp_address_hash, addr); | |
622 | XFREE (MTYPE_BGP_ADDR, addr); | |
623 | } | |
624 | } | |
625 | ||
718e3744 | 626 | \f |
5932020b | 627 | struct bgp_connected_ref |
718e3744 | 628 | { |
629 | unsigned int refcnt; | |
630 | }; | |
631 | ||
632 | void | |
633 | bgp_connected_add (struct connected *ifc) | |
634 | { | |
635 | struct prefix p; | |
636 | struct prefix *addr; | |
718e3744 | 637 | struct interface *ifp; |
638 | struct bgp_node *rn; | |
5932020b | 639 | struct bgp_connected_ref *bc; |
718e3744 | 640 | |
641 | ifp = ifc->ifp; | |
642 | ||
643 | if (! ifp) | |
644 | return; | |
645 | ||
646 | if (if_is_loopback (ifp)) | |
647 | return; | |
648 | ||
649 | addr = ifc->address; | |
718e3744 | 650 | |
651 | if (addr->family == AF_INET) | |
652 | { | |
e4529636 | 653 | PREFIX_COPY_IPV4(&p, CONNECTED_PREFIX(ifc)); |
718e3744 | 654 | apply_mask_ipv4 ((struct prefix_ipv4 *) &p); |
655 | ||
656 | if (prefix_ipv4_any ((struct prefix_ipv4 *) &p)) | |
657 | return; | |
658 | ||
10f9bf3f JBD |
659 | bgp_address_add (addr); |
660 | ||
5932020b | 661 | rn = bgp_node_get (bgp_connected_table[AFI_IP], (struct prefix *) &p); |
718e3744 | 662 | if (rn->info) |
663 | { | |
664 | bc = rn->info; | |
665 | bc->refcnt++; | |
666 | } | |
667 | else | |
668 | { | |
6c88b44d | 669 | bc = XCALLOC (MTYPE_BGP_CONN, sizeof (struct bgp_connected_ref)); |
718e3744 | 670 | bc->refcnt = 1; |
671 | rn->info = bc; | |
672 | } | |
673 | } | |
674 | #ifdef HAVE_IPV6 | |
e4529636 | 675 | else if (addr->family == AF_INET6) |
718e3744 | 676 | { |
e4529636 | 677 | PREFIX_COPY_IPV6(&p, CONNECTED_PREFIX(ifc)); |
718e3744 | 678 | apply_mask_ipv6 ((struct prefix_ipv6 *) &p); |
679 | ||
680 | if (IN6_IS_ADDR_UNSPECIFIED (&p.u.prefix6)) | |
681 | return; | |
682 | ||
683 | if (IN6_IS_ADDR_LINKLOCAL (&p.u.prefix6)) | |
684 | return; | |
685 | ||
5932020b | 686 | rn = bgp_node_get (bgp_connected_table[AFI_IP6], (struct prefix *) &p); |
718e3744 | 687 | if (rn->info) |
688 | { | |
689 | bc = rn->info; | |
690 | bc->refcnt++; | |
691 | } | |
692 | else | |
693 | { | |
6c88b44d | 694 | bc = XCALLOC (MTYPE_BGP_CONN, sizeof (struct bgp_connected_ref)); |
718e3744 | 695 | bc->refcnt = 1; |
696 | rn->info = bc; | |
697 | } | |
698 | } | |
699 | #endif /* HAVE_IPV6 */ | |
700 | } | |
701 | ||
702 | void | |
703 | bgp_connected_delete (struct connected *ifc) | |
704 | { | |
705 | struct prefix p; | |
706 | struct prefix *addr; | |
718e3744 | 707 | struct interface *ifp; |
708 | struct bgp_node *rn; | |
5932020b | 709 | struct bgp_connected_ref *bc; |
718e3744 | 710 | |
711 | ifp = ifc->ifp; | |
712 | ||
713 | if (if_is_loopback (ifp)) | |
714 | return; | |
715 | ||
716 | addr = ifc->address; | |
718e3744 | 717 | |
718 | if (addr->family == AF_INET) | |
719 | { | |
e4529636 | 720 | PREFIX_COPY_IPV4(&p, CONNECTED_PREFIX(ifc)); |
718e3744 | 721 | apply_mask_ipv4 ((struct prefix_ipv4 *) &p); |
722 | ||
723 | if (prefix_ipv4_any ((struct prefix_ipv4 *) &p)) | |
724 | return; | |
725 | ||
10f9bf3f JBD |
726 | bgp_address_del (addr); |
727 | ||
5932020b | 728 | rn = bgp_node_lookup (bgp_connected_table[AFI_IP], &p); |
718e3744 | 729 | if (! rn) |
730 | return; | |
731 | ||
732 | bc = rn->info; | |
733 | bc->refcnt--; | |
734 | if (bc->refcnt == 0) | |
735 | { | |
6c88b44d | 736 | XFREE (MTYPE_BGP_CONN, bc); |
718e3744 | 737 | rn->info = NULL; |
738 | } | |
739 | bgp_unlock_node (rn); | |
740 | bgp_unlock_node (rn); | |
741 | } | |
742 | #ifdef HAVE_IPV6 | |
743 | else if (addr->family == AF_INET6) | |
744 | { | |
e4529636 | 745 | PREFIX_COPY_IPV6(&p, CONNECTED_PREFIX(ifc)); |
718e3744 | 746 | apply_mask_ipv6 ((struct prefix_ipv6 *) &p); |
747 | ||
748 | if (IN6_IS_ADDR_UNSPECIFIED (&p.u.prefix6)) | |
749 | return; | |
750 | ||
751 | if (IN6_IS_ADDR_LINKLOCAL (&p.u.prefix6)) | |
752 | return; | |
753 | ||
5932020b | 754 | rn = bgp_node_lookup (bgp_connected_table[AFI_IP6], (struct prefix *) &p); |
718e3744 | 755 | if (! rn) |
756 | return; | |
757 | ||
758 | bc = rn->info; | |
759 | bc->refcnt--; | |
760 | if (bc->refcnt == 0) | |
761 | { | |
6c88b44d | 762 | XFREE (MTYPE_BGP_CONN, bc); |
718e3744 | 763 | rn->info = NULL; |
764 | } | |
765 | bgp_unlock_node (rn); | |
766 | bgp_unlock_node (rn); | |
767 | } | |
768 | #endif /* HAVE_IPV6 */ | |
769 | } | |
770 | ||
771 | int | |
10f9bf3f | 772 | bgp_nexthop_self (struct attr *attr) |
718e3744 | 773 | { |
10f9bf3f | 774 | struct bgp_addr tmp, *addr; |
718e3744 | 775 | |
10f9bf3f JBD |
776 | tmp.addr = attr->nexthop; |
777 | ||
778 | addr = hash_lookup (bgp_address_hash, &tmp); | |
779 | if (addr) | |
780 | return 1; | |
718e3744 | 781 | |
718e3744 | 782 | return 0; |
783 | } | |
784 | \f | |
94f2b392 | 785 | static struct bgp_nexthop_cache * |
66e5cd87 | 786 | zlookup_read (void) |
718e3744 | 787 | { |
788 | struct stream *s; | |
d3092e7f | 789 | uint16_t length; |
790 | u_char marker; | |
791 | u_char version; | |
792 | uint16_t command; | |
718e3744 | 793 | int nbytes; |
794 | struct in_addr raddr; | |
d3092e7f | 795 | uint32_t metric; |
718e3744 | 796 | int i; |
797 | u_char nexthop_num; | |
798 | struct nexthop *nexthop; | |
799 | struct bgp_nexthop_cache *bnc; | |
800 | ||
801 | s = zlookup->ibuf; | |
802 | stream_reset (s); | |
803 | ||
804 | nbytes = stream_read (s, zlookup->sock, 2); | |
805 | length = stream_getw (s); | |
806 | ||
807 | nbytes = stream_read (s, zlookup->sock, length - 2); | |
d3092e7f | 808 | marker = stream_getc (s); |
809 | version = stream_getc (s); | |
810 | ||
811 | if (version != ZSERV_VERSION || marker != ZEBRA_HEADER_MARKER) | |
812 | { | |
813 | zlog_err("%s: socket %d version mismatch, marker %d, version %d", | |
814 | __func__, zlookup->sock, marker, version); | |
815 | return NULL; | |
816 | } | |
817 | ||
818 | command = stream_getw (s); | |
819 | ||
718e3744 | 820 | raddr.s_addr = stream_get_ipv4 (s); |
821 | metric = stream_getl (s); | |
822 | nexthop_num = stream_getc (s); | |
823 | ||
824 | if (nexthop_num) | |
825 | { | |
826 | bnc = bnc_new (); | |
827 | bnc->valid = 1; | |
828 | bnc->metric = metric; | |
829 | bnc->nexthop_num = nexthop_num; | |
830 | ||
831 | for (i = 0; i < nexthop_num; i++) | |
832 | { | |
393deb9b | 833 | nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
718e3744 | 834 | nexthop->type = stream_getc (s); |
835 | switch (nexthop->type) | |
836 | { | |
837 | case ZEBRA_NEXTHOP_IPV4: | |
838 | nexthop->gate.ipv4.s_addr = stream_get_ipv4 (s); | |
839 | break; | |
bb97e462 CF |
840 | case ZEBRA_NEXTHOP_IPV4_IFINDEX: |
841 | nexthop->gate.ipv4.s_addr = stream_get_ipv4 (s); | |
842 | nexthop->ifindex = stream_getl (s); | |
843 | break; | |
718e3744 | 844 | case ZEBRA_NEXTHOP_IFINDEX: |
845 | case ZEBRA_NEXTHOP_IFNAME: | |
846 | nexthop->ifindex = stream_getl (s); | |
847 | break; | |
fa2b17e3 | 848 | default: |
849 | /* do nothing */ | |
850 | break; | |
718e3744 | 851 | } |
852 | bnc_nexthop_add (bnc, nexthop); | |
853 | } | |
854 | } | |
855 | else | |
856 | return NULL; | |
857 | ||
858 | return bnc; | |
859 | } | |
860 | ||
861 | struct bgp_nexthop_cache * | |
862 | zlookup_query (struct in_addr addr) | |
863 | { | |
864 | int ret; | |
865 | struct stream *s; | |
866 | ||
867 | /* Check socket. */ | |
868 | if (zlookup->sock < 0) | |
869 | return NULL; | |
870 | ||
871 | s = zlookup->obuf; | |
872 | stream_reset (s); | |
d3092e7f | 873 | zclient_create_header (s, ZEBRA_IPV4_NEXTHOP_LOOKUP); |
718e3744 | 874 | stream_put_in_addr (s, &addr); |
d3092e7f | 875 | |
876 | stream_putw_at (s, 0, stream_get_endp (s)); | |
877 | ||
878 | ret = writen (zlookup->sock, s->data, stream_get_endp (s)); | |
718e3744 | 879 | if (ret < 0) |
880 | { | |
881 | zlog_err ("can't write to zlookup->sock"); | |
882 | close (zlookup->sock); | |
883 | zlookup->sock = -1; | |
884 | return NULL; | |
885 | } | |
886 | if (ret == 0) | |
887 | { | |
888 | zlog_err ("zlookup->sock connection closed"); | |
889 | close (zlookup->sock); | |
890 | zlookup->sock = -1; | |
891 | return NULL; | |
892 | } | |
893 | ||
894 | return zlookup_read (); | |
895 | } | |
896 | ||
897 | #ifdef HAVE_IPV6 | |
94f2b392 | 898 | static struct bgp_nexthop_cache * |
66e5cd87 | 899 | zlookup_read_ipv6 (void) |
718e3744 | 900 | { |
901 | struct stream *s; | |
d3092e7f | 902 | uint16_t length; |
903 | u_char version, marker; | |
904 | uint16_t command; | |
718e3744 | 905 | int nbytes; |
906 | struct in6_addr raddr; | |
d3092e7f | 907 | uint32_t metric; |
718e3744 | 908 | int i; |
909 | u_char nexthop_num; | |
910 | struct nexthop *nexthop; | |
911 | struct bgp_nexthop_cache *bnc; | |
912 | ||
913 | s = zlookup->ibuf; | |
914 | stream_reset (s); | |
915 | ||
916 | nbytes = stream_read (s, zlookup->sock, 2); | |
917 | length = stream_getw (s); | |
918 | ||
919 | nbytes = stream_read (s, zlookup->sock, length - 2); | |
d3092e7f | 920 | marker = stream_getc (s); |
921 | version = stream_getc (s); | |
922 | ||
923 | if (version != ZSERV_VERSION || marker != ZEBRA_HEADER_MARKER) | |
924 | { | |
925 | zlog_err("%s: socket %d version mismatch, marker %d, version %d", | |
926 | __func__, zlookup->sock, marker, version); | |
927 | return NULL; | |
928 | } | |
929 | ||
930 | command = stream_getw (s); | |
931 | ||
718e3744 | 932 | stream_get (&raddr, s, 16); |
933 | ||
934 | metric = stream_getl (s); | |
935 | nexthop_num = stream_getc (s); | |
936 | ||
937 | if (nexthop_num) | |
938 | { | |
939 | bnc = bnc_new (); | |
940 | bnc->valid = 1; | |
941 | bnc->metric = metric; | |
942 | bnc->nexthop_num = nexthop_num; | |
943 | ||
944 | for (i = 0; i < nexthop_num; i++) | |
945 | { | |
393deb9b | 946 | nexthop = XCALLOC (MTYPE_NEXTHOP, sizeof (struct nexthop)); |
718e3744 | 947 | nexthop->type = stream_getc (s); |
948 | switch (nexthop->type) | |
949 | { | |
950 | case ZEBRA_NEXTHOP_IPV6: | |
951 | stream_get (&nexthop->gate.ipv6, s, 16); | |
952 | break; | |
953 | case ZEBRA_NEXTHOP_IPV6_IFINDEX: | |
954 | case ZEBRA_NEXTHOP_IPV6_IFNAME: | |
955 | stream_get (&nexthop->gate.ipv6, s, 16); | |
956 | nexthop->ifindex = stream_getl (s); | |
957 | break; | |
958 | case ZEBRA_NEXTHOP_IFINDEX: | |
959 | case ZEBRA_NEXTHOP_IFNAME: | |
960 | nexthop->ifindex = stream_getl (s); | |
961 | break; | |
fa2b17e3 | 962 | default: |
963 | /* do nothing */ | |
964 | break; | |
718e3744 | 965 | } |
966 | bnc_nexthop_add (bnc, nexthop); | |
967 | } | |
968 | } | |
969 | else | |
970 | return NULL; | |
971 | ||
972 | return bnc; | |
973 | } | |
974 | ||
975 | struct bgp_nexthop_cache * | |
976 | zlookup_query_ipv6 (struct in6_addr *addr) | |
977 | { | |
978 | int ret; | |
979 | struct stream *s; | |
980 | ||
981 | /* Check socket. */ | |
982 | if (zlookup->sock < 0) | |
983 | return NULL; | |
984 | ||
985 | s = zlookup->obuf; | |
986 | stream_reset (s); | |
d3092e7f | 987 | zclient_create_header (s, ZEBRA_IPV6_NEXTHOP_LOOKUP); |
718e3744 | 988 | stream_put (s, addr, 16); |
d3092e7f | 989 | stream_putw_at (s, 0, stream_get_endp (s)); |
990 | ||
991 | ret = writen (zlookup->sock, s->data, stream_get_endp (s)); | |
718e3744 | 992 | if (ret < 0) |
993 | { | |
994 | zlog_err ("can't write to zlookup->sock"); | |
995 | close (zlookup->sock); | |
996 | zlookup->sock = -1; | |
997 | return NULL; | |
998 | } | |
999 | if (ret == 0) | |
1000 | { | |
1001 | zlog_err ("zlookup->sock connection closed"); | |
1002 | close (zlookup->sock); | |
1003 | zlookup->sock = -1; | |
1004 | return NULL; | |
1005 | } | |
1006 | ||
1007 | return zlookup_read_ipv6 (); | |
1008 | } | |
1009 | #endif /* HAVE_IPV6 */ | |
1010 | ||
94f2b392 | 1011 | static int |
1012 | bgp_import_check (struct prefix *p, u_int32_t *igpmetric, | |
1013 | struct in_addr *igpnexthop) | |
718e3744 | 1014 | { |
1015 | struct stream *s; | |
1016 | int ret; | |
d3092e7f | 1017 | u_int16_t length, command; |
1018 | u_char version, marker; | |
718e3744 | 1019 | int nbytes; |
1020 | struct in_addr addr; | |
1021 | struct in_addr nexthop; | |
1022 | u_int32_t metric = 0; | |
1023 | u_char nexthop_num; | |
1024 | u_char nexthop_type; | |
1025 | ||
1026 | /* If lookup connection is not available return valid. */ | |
1027 | if (zlookup->sock < 0) | |
1028 | { | |
1029 | if (igpmetric) | |
1030 | *igpmetric = 0; | |
1031 | return 1; | |
1032 | } | |
1033 | ||
1034 | /* Send query to the lookup connection */ | |
1035 | s = zlookup->obuf; | |
1036 | stream_reset (s); | |
d3092e7f | 1037 | zclient_create_header (s, ZEBRA_IPV4_IMPORT_LOOKUP); |
1038 | ||
718e3744 | 1039 | stream_putc (s, p->prefixlen); |
1040 | stream_put_in_addr (s, &p->u.prefix4); | |
d3092e7f | 1041 | |
1042 | stream_putw_at (s, 0, stream_get_endp (s)); | |
1043 | ||
718e3744 | 1044 | /* Write the packet. */ |
d3092e7f | 1045 | ret = writen (zlookup->sock, s->data, stream_get_endp (s)); |
718e3744 | 1046 | |
1047 | if (ret < 0) | |
1048 | { | |
1049 | zlog_err ("can't write to zlookup->sock"); | |
1050 | close (zlookup->sock); | |
1051 | zlookup->sock = -1; | |
1052 | return 1; | |
1053 | } | |
1054 | if (ret == 0) | |
1055 | { | |
1056 | zlog_err ("zlookup->sock connection closed"); | |
1057 | close (zlookup->sock); | |
1058 | zlookup->sock = -1; | |
1059 | return 1; | |
1060 | } | |
1061 | ||
1062 | /* Get result. */ | |
1063 | stream_reset (s); | |
1064 | ||
1065 | /* Fetch length. */ | |
1066 | nbytes = stream_read (s, zlookup->sock, 2); | |
1067 | length = stream_getw (s); | |
1068 | ||
1069 | /* Fetch whole data. */ | |
1070 | nbytes = stream_read (s, zlookup->sock, length - 2); | |
d3092e7f | 1071 | marker = stream_getc (s); |
1072 | version = stream_getc (s); | |
1073 | ||
1074 | if (version != ZSERV_VERSION || marker != ZEBRA_HEADER_MARKER) | |
1075 | { | |
1076 | zlog_err("%s: socket %d version mismatch, marker %d, version %d", | |
1077 | __func__, zlookup->sock, marker, version); | |
1078 | return 0; | |
1079 | } | |
1080 | ||
1081 | command = stream_getw (s); | |
1082 | ||
718e3744 | 1083 | addr.s_addr = stream_get_ipv4 (s); |
1084 | metric = stream_getl (s); | |
1085 | nexthop_num = stream_getc (s); | |
1086 | ||
1087 | /* Set IGP metric value. */ | |
1088 | if (igpmetric) | |
1089 | *igpmetric = metric; | |
1090 | ||
1091 | /* If there is nexthop then this is active route. */ | |
1092 | if (nexthop_num) | |
1093 | { | |
1094 | nexthop.s_addr = 0; | |
1095 | nexthop_type = stream_getc (s); | |
1096 | if (nexthop_type == ZEBRA_NEXTHOP_IPV4) | |
1097 | { | |
1098 | nexthop.s_addr = stream_get_ipv4 (s); | |
1099 | if (igpnexthop) | |
1100 | *igpnexthop = nexthop; | |
1101 | } | |
1102 | else | |
1103 | *igpnexthop = nexthop; | |
1104 | ||
1105 | return 1; | |
1106 | } | |
1107 | else | |
1108 | return 0; | |
1109 | } | |
1110 | ||
1111 | /* Scan all configured BGP route then check the route exists in IGP or | |
1112 | not. */ | |
94f2b392 | 1113 | static int |
718e3744 | 1114 | bgp_import (struct thread *t) |
1115 | { | |
1116 | struct bgp *bgp; | |
1117 | struct bgp_node *rn; | |
1118 | struct bgp_static *bgp_static; | |
1eb8ef25 | 1119 | struct listnode *node, *nnode; |
718e3744 | 1120 | int valid; |
1121 | u_int32_t metric; | |
1122 | struct in_addr nexthop; | |
1123 | afi_t afi; | |
1124 | safi_t safi; | |
1125 | ||
1126 | bgp_import_thread = | |
1127 | thread_add_timer (master, bgp_import, NULL, bgp_import_interval); | |
1128 | ||
f418446b | 1129 | if (BGP_DEBUG (events, EVENTS)) |
1130 | zlog_debug ("Import timer expired."); | |
718e3744 | 1131 | |
1eb8ef25 | 1132 | for (ALL_LIST_ELEMENTS (bm->bgp, node, nnode, bgp)) |
6cbbc3cc | 1133 | { |
1134 | for (afi = AFI_IP; afi < AFI_MAX; afi++) | |
1135 | for (safi = SAFI_UNICAST; safi < SAFI_MPLS_VPN; safi++) | |
1136 | for (rn = bgp_table_top (bgp->route[afi][safi]); rn; | |
1137 | rn = bgp_route_next (rn)) | |
1138 | if ((bgp_static = rn->info) != NULL) | |
718e3744 | 1139 | { |
6cbbc3cc | 1140 | if (bgp_static->backdoor) |
1141 | continue; | |
718e3744 | 1142 | |
6cbbc3cc | 1143 | valid = bgp_static->valid; |
1144 | metric = bgp_static->igpmetric; | |
1145 | nexthop = bgp_static->igpnexthop; | |
1146 | ||
1147 | if (bgp_flag_check (bgp, BGP_FLAG_IMPORT_CHECK) | |
1148 | && afi == AFI_IP && safi == SAFI_UNICAST) | |
1149 | bgp_static->valid = bgp_import_check (&rn->p, &bgp_static->igpmetric, | |
1150 | &bgp_static->igpnexthop); | |
718e3744 | 1151 | else |
6cbbc3cc | 1152 | { |
1153 | bgp_static->valid = 1; | |
1154 | bgp_static->igpmetric = 0; | |
1155 | bgp_static->igpnexthop.s_addr = 0; | |
1156 | } | |
1157 | ||
1158 | if (bgp_static->valid != valid) | |
1159 | { | |
1160 | if (bgp_static->valid) | |
1161 | bgp_static_update (bgp, &rn->p, bgp_static, afi, safi); | |
1162 | else | |
1163 | bgp_static_withdraw (bgp, &rn->p, afi, safi); | |
1164 | } | |
1165 | else if (bgp_static->valid) | |
1166 | { | |
1167 | if (bgp_static->igpmetric != metric | |
1168 | || bgp_static->igpnexthop.s_addr != nexthop.s_addr | |
1169 | || bgp_static->rmap.name) | |
1170 | bgp_static_update (bgp, &rn->p, bgp_static, afi, safi); | |
1171 | } | |
718e3744 | 1172 | } |
6cbbc3cc | 1173 | } |
718e3744 | 1174 | return 0; |
1175 | } | |
1176 | ||
1177 | /* Connect to zebra for nexthop lookup. */ | |
94f2b392 | 1178 | static int |
718e3744 | 1179 | zlookup_connect (struct thread *t) |
1180 | { | |
1181 | struct zclient *zlookup; | |
1182 | ||
1183 | zlookup = THREAD_ARG (t); | |
1184 | zlookup->t_connect = NULL; | |
1185 | ||
1186 | if (zlookup->sock != -1) | |
1187 | return 0; | |
1188 | ||
b5114685 | 1189 | if (zclient_socket_connect (zlookup) < 0) |
718e3744 | 1190 | return -1; |
1191 | ||
718e3744 | 1192 | return 0; |
1193 | } | |
1194 | ||
1195 | /* Check specified multiaccess next-hop. */ | |
1196 | int | |
1197 | bgp_multiaccess_check_v4 (struct in_addr nexthop, char *peer) | |
1198 | { | |
1199 | struct bgp_node *rn1; | |
1200 | struct bgp_node *rn2; | |
1201 | struct prefix p1; | |
1202 | struct prefix p2; | |
1203 | struct in_addr addr; | |
1204 | int ret; | |
1205 | ||
1206 | ret = inet_aton (peer, &addr); | |
1207 | if (! ret) | |
1208 | return 0; | |
1209 | ||
1210 | memset (&p1, 0, sizeof (struct prefix)); | |
1211 | p1.family = AF_INET; | |
1212 | p1.prefixlen = IPV4_MAX_BITLEN; | |
1213 | p1.u.prefix4 = nexthop; | |
1214 | memset (&p2, 0, sizeof (struct prefix)); | |
1215 | p2.family = AF_INET; | |
1216 | p2.prefixlen = IPV4_MAX_BITLEN; | |
1217 | p2.u.prefix4 = addr; | |
1218 | ||
1219 | /* If bgp scan is not enabled, return invalid. */ | |
1220 | if (zlookup->sock < 0) | |
1221 | return 0; | |
1222 | ||
5932020b | 1223 | rn1 = bgp_node_match (bgp_connected_table[AFI_IP], &p1); |
718e3744 | 1224 | if (! rn1) |
1225 | return 0; | |
6c88b44d | 1226 | bgp_unlock_node (rn1); |
718e3744 | 1227 | |
5932020b | 1228 | rn2 = bgp_node_match (bgp_connected_table[AFI_IP], &p2); |
718e3744 | 1229 | if (! rn2) |
1230 | return 0; | |
6c88b44d | 1231 | bgp_unlock_node (rn2); |
718e3744 | 1232 | |
6c88b44d CC |
1233 | /* This is safe, even with above unlocks, since we are just |
1234 | comparing pointers to the objects, not the objects themselves. */ | |
718e3744 | 1235 | if (rn1 == rn2) |
1236 | return 1; | |
1237 | ||
1238 | return 0; | |
1239 | } | |
1240 | \f | |
1241 | DEFUN (bgp_scan_time, | |
1242 | bgp_scan_time_cmd, | |
1243 | "bgp scan-time <5-60>", | |
1244 | "BGP specific commands\n" | |
1245 | "Configure background scanner interval\n" | |
1246 | "Scanner interval (seconds)\n") | |
1247 | { | |
1248 | bgp_scan_interval = atoi (argv[0]); | |
1249 | ||
1250 | if (bgp_scan_thread) | |
1251 | { | |
1252 | thread_cancel (bgp_scan_thread); | |
1253 | bgp_scan_thread = | |
5932020b | 1254 | thread_add_timer (master, bgp_scan_timer, NULL, bgp_scan_interval); |
718e3744 | 1255 | } |
1256 | ||
1257 | return CMD_SUCCESS; | |
1258 | } | |
1259 | ||
1260 | DEFUN (no_bgp_scan_time, | |
1261 | no_bgp_scan_time_cmd, | |
1262 | "no bgp scan-time", | |
1263 | NO_STR | |
1264 | "BGP specific commands\n" | |
1265 | "Configure background scanner interval\n") | |
1266 | { | |
1267 | bgp_scan_interval = BGP_SCAN_INTERVAL_DEFAULT; | |
1268 | ||
1269 | if (bgp_scan_thread) | |
1270 | { | |
1271 | thread_cancel (bgp_scan_thread); | |
1272 | bgp_scan_thread = | |
5932020b | 1273 | thread_add_timer (master, bgp_scan_timer, NULL, bgp_scan_interval); |
718e3744 | 1274 | } |
1275 | ||
1276 | return CMD_SUCCESS; | |
1277 | } | |
1278 | ||
1279 | ALIAS (no_bgp_scan_time, | |
1280 | no_bgp_scan_time_val_cmd, | |
1281 | "no bgp scan-time <5-60>", | |
1282 | NO_STR | |
1283 | "BGP specific commands\n" | |
1284 | "Configure background scanner interval\n" | |
1285 | "Scanner interval (seconds)\n") | |
1286 | ||
318f0d8a DO |
1287 | static int |
1288 | show_ip_bgp_scan_tables (struct vty *vty, const char detail) | |
718e3744 | 1289 | { |
1290 | struct bgp_node *rn; | |
1291 | struct bgp_nexthop_cache *bnc; | |
318f0d8a DO |
1292 | char buf[INET6_ADDRSTRLEN]; |
1293 | u_char i; | |
718e3744 | 1294 | |
1295 | if (bgp_scan_thread) | |
1296 | vty_out (vty, "BGP scan is running%s", VTY_NEWLINE); | |
1297 | else | |
1298 | vty_out (vty, "BGP scan is not running%s", VTY_NEWLINE); | |
1299 | vty_out (vty, "BGP scan interval is %d%s", bgp_scan_interval, VTY_NEWLINE); | |
1300 | ||
1301 | vty_out (vty, "Current BGP nexthop cache:%s", VTY_NEWLINE); | |
5932020b | 1302 | for (rn = bgp_table_top (bgp_nexthop_cache_table[AFI_IP]); rn; rn = bgp_route_next (rn)) |
718e3744 | 1303 | if ((bnc = rn->info) != NULL) |
1304 | { | |
1305 | if (bnc->valid) | |
318f0d8a | 1306 | { |
718e3744 | 1307 | vty_out (vty, " %s valid [IGP metric %d]%s", |
318f0d8a DO |
1308 | inet_ntop (AF_INET, &rn->p.u.prefix4, buf, INET6_ADDRSTRLEN), bnc->metric, VTY_NEWLINE); |
1309 | if (detail) | |
1310 | for (i = 0; i < bnc->nexthop_num; i++) | |
0e8032d6 DO |
1311 | switch (bnc->nexthop[i].type) |
1312 | { | |
1313 | case NEXTHOP_TYPE_IPV4: | |
1314 | vty_out (vty, " gate %s%s", inet_ntop (AF_INET, &bnc->nexthop[i].gate.ipv4, buf, INET6_ADDRSTRLEN), VTY_NEWLINE); | |
1315 | break; | |
bb97e462 CF |
1316 | case NEXTHOP_TYPE_IPV4_IFINDEX: |
1317 | vty_out (vty, " gate %s", inet_ntop (AF_INET, &bnc->nexthop[i].gate.ipv4, buf, INET6_ADDRSTRLEN)); | |
1318 | vty_out (vty, " ifidx %u%s", bnc->nexthop[i].ifindex, VTY_NEWLINE); | |
1319 | break; | |
0e8032d6 DO |
1320 | case NEXTHOP_TYPE_IFINDEX: |
1321 | vty_out (vty, " ifidx %u%s", bnc->nexthop[i].ifindex, VTY_NEWLINE); | |
1322 | break; | |
1323 | default: | |
1324 | vty_out (vty, " invalid nexthop type %u%s", bnc->nexthop[i].type, VTY_NEWLINE); | |
1325 | } | |
318f0d8a | 1326 | } |
718e3744 | 1327 | else |
1328 | vty_out (vty, " %s invalid%s", | |
318f0d8a | 1329 | inet_ntop (AF_INET, &rn->p.u.prefix4, buf, INET6_ADDRSTRLEN), VTY_NEWLINE); |
718e3744 | 1330 | } |
1331 | ||
1332 | #ifdef HAVE_IPV6 | |
1333 | { | |
5932020b | 1334 | for (rn = bgp_table_top (bgp_nexthop_cache_table[AFI_IP6]); |
1335 | rn; | |
1336 | rn = bgp_route_next (rn)) | |
718e3744 | 1337 | if ((bnc = rn->info) != NULL) |
1338 | { | |
1339 | if (bnc->valid) | |
318f0d8a | 1340 | { |
718e3744 | 1341 | vty_out (vty, " %s valid [IGP metric %d]%s", |
318f0d8a | 1342 | inet_ntop (AF_INET6, &rn->p.u.prefix6, buf, INET6_ADDRSTRLEN), |
718e3744 | 1343 | bnc->metric, VTY_NEWLINE); |
318f0d8a DO |
1344 | if (detail) |
1345 | for (i = 0; i < bnc->nexthop_num; i++) | |
0e8032d6 DO |
1346 | switch (bnc->nexthop[i].type) |
1347 | { | |
1348 | case NEXTHOP_TYPE_IPV6: | |
1349 | vty_out (vty, " gate %s%s", inet_ntop (AF_INET6, &bnc->nexthop[i].gate.ipv6, buf, INET6_ADDRSTRLEN), VTY_NEWLINE); | |
1350 | break; | |
1351 | case NEXTHOP_TYPE_IFINDEX: | |
1352 | vty_out (vty, " ifidx %u%s", bnc->nexthop[i].ifindex, VTY_NEWLINE); | |
1353 | break; | |
1354 | default: | |
1355 | vty_out (vty, " invalid nexthop type %u%s", bnc->nexthop[i].type, VTY_NEWLINE); | |
1356 | } | |
318f0d8a | 1357 | } |
718e3744 | 1358 | else |
1359 | vty_out (vty, " %s invalid%s", | |
318f0d8a | 1360 | inet_ntop (AF_INET6, &rn->p.u.prefix6, buf, INET6_ADDRSTRLEN), |
718e3744 | 1361 | VTY_NEWLINE); |
1362 | } | |
1363 | } | |
1364 | #endif /* HAVE_IPV6 */ | |
1365 | ||
1366 | vty_out (vty, "BGP connected route:%s", VTY_NEWLINE); | |
5932020b | 1367 | for (rn = bgp_table_top (bgp_connected_table[AFI_IP]); |
1368 | rn; | |
1369 | rn = bgp_route_next (rn)) | |
718e3744 | 1370 | if (rn->info != NULL) |
1371 | vty_out (vty, " %s/%d%s", inet_ntoa (rn->p.u.prefix4), rn->p.prefixlen, | |
1372 | VTY_NEWLINE); | |
1373 | ||
1374 | #ifdef HAVE_IPV6 | |
1375 | { | |
5932020b | 1376 | for (rn = bgp_table_top (bgp_connected_table[AFI_IP6]); |
1377 | rn; | |
1378 | rn = bgp_route_next (rn)) | |
718e3744 | 1379 | if (rn->info != NULL) |
1380 | vty_out (vty, " %s/%d%s", | |
318f0d8a | 1381 | inet_ntop (AF_INET6, &rn->p.u.prefix6, buf, INET6_ADDRSTRLEN), |
718e3744 | 1382 | rn->p.prefixlen, |
1383 | VTY_NEWLINE); | |
1384 | } | |
1385 | #endif /* HAVE_IPV6 */ | |
1386 | ||
1387 | return CMD_SUCCESS; | |
1388 | } | |
1389 | ||
318f0d8a DO |
1390 | DEFUN (show_ip_bgp_scan, |
1391 | show_ip_bgp_scan_cmd, | |
1392 | "show ip bgp scan", | |
1393 | SHOW_STR | |
1394 | IP_STR | |
1395 | BGP_STR | |
1396 | "BGP scan status\n") | |
1397 | { | |
1398 | return show_ip_bgp_scan_tables (vty, 0); | |
1399 | } | |
1400 | ||
1401 | DEFUN (show_ip_bgp_scan_detail, | |
1402 | show_ip_bgp_scan_detail_cmd, | |
1403 | "show ip bgp scan detail", | |
1404 | SHOW_STR | |
1405 | IP_STR | |
1406 | BGP_STR | |
1407 | "BGP scan status\n" | |
1408 | "More detailed output\n") | |
1409 | { | |
1410 | return show_ip_bgp_scan_tables (vty, 1); | |
1411 | } | |
1412 | ||
718e3744 | 1413 | int |
1414 | bgp_config_write_scan_time (struct vty *vty) | |
1415 | { | |
1416 | if (bgp_scan_interval != BGP_SCAN_INTERVAL_DEFAULT) | |
1417 | vty_out (vty, " bgp scan-time %d%s", bgp_scan_interval, VTY_NEWLINE); | |
1418 | return CMD_SUCCESS; | |
1419 | } | |
1420 | ||
1421 | void | |
66e5cd87 | 1422 | bgp_scan_init (void) |
718e3744 | 1423 | { |
1424 | zlookup = zclient_new (); | |
1425 | zlookup->sock = -1; | |
718e3744 | 1426 | zlookup->t_connect = thread_add_event (master, zlookup_connect, zlookup, 0); |
1427 | ||
1428 | bgp_scan_interval = BGP_SCAN_INTERVAL_DEFAULT; | |
1429 | bgp_import_interval = BGP_IMPORT_INTERVAL_DEFAULT; | |
1430 | ||
64e580a7 PJ |
1431 | cache1_table[AFI_IP] = bgp_table_init (AFI_IP, SAFI_UNICAST); |
1432 | cache2_table[AFI_IP] = bgp_table_init (AFI_IP, SAFI_UNICAST); | |
5932020b | 1433 | bgp_nexthop_cache_table[AFI_IP] = cache1_table[AFI_IP]; |
718e3744 | 1434 | |
64e580a7 | 1435 | bgp_connected_table[AFI_IP] = bgp_table_init (AFI_IP, SAFI_UNICAST); |
718e3744 | 1436 | |
1437 | #ifdef HAVE_IPV6 | |
64e580a7 PJ |
1438 | cache1_table[AFI_IP6] = bgp_table_init (AFI_IP6, SAFI_UNICAST); |
1439 | cache2_table[AFI_IP6] = bgp_table_init (AFI_IP6, SAFI_UNICAST); | |
5932020b | 1440 | bgp_nexthop_cache_table[AFI_IP6] = cache1_table[AFI_IP6]; |
64e580a7 | 1441 | bgp_connected_table[AFI_IP6] = bgp_table_init (AFI_IP6, SAFI_UNICAST); |
718e3744 | 1442 | #endif /* HAVE_IPV6 */ |
1443 | ||
1444 | /* Make BGP scan thread. */ | |
5932020b | 1445 | bgp_scan_thread = thread_add_timer (master, bgp_scan_timer, |
1446 | NULL, bgp_scan_interval); | |
6cbbc3cc | 1447 | /* Make BGP import there. */ |
1448 | bgp_import_thread = thread_add_timer (master, bgp_import, NULL, 0); | |
718e3744 | 1449 | |
1450 | install_element (BGP_NODE, &bgp_scan_time_cmd); | |
1451 | install_element (BGP_NODE, &no_bgp_scan_time_cmd); | |
1452 | install_element (BGP_NODE, &no_bgp_scan_time_val_cmd); | |
1453 | install_element (VIEW_NODE, &show_ip_bgp_scan_cmd); | |
318f0d8a | 1454 | install_element (VIEW_NODE, &show_ip_bgp_scan_detail_cmd); |
62687ff1 | 1455 | install_element (RESTRICTED_NODE, &show_ip_bgp_scan_cmd); |
718e3744 | 1456 | install_element (ENABLE_NODE, &show_ip_bgp_scan_cmd); |
318f0d8a | 1457 | install_element (ENABLE_NODE, &show_ip_bgp_scan_detail_cmd); |
718e3744 | 1458 | } |
228da428 CC |
1459 | |
1460 | void | |
1461 | bgp_scan_finish (void) | |
1462 | { | |
6c88b44d CC |
1463 | /* Only the current one needs to be reset. */ |
1464 | bgp_nexthop_cache_reset (bgp_nexthop_cache_table[AFI_IP]); | |
1465 | ||
228da428 CC |
1466 | bgp_table_unlock (cache1_table[AFI_IP]); |
1467 | cache1_table[AFI_IP] = NULL; | |
1468 | ||
1469 | bgp_table_unlock (cache2_table[AFI_IP]); | |
1470 | cache2_table[AFI_IP] = NULL; | |
1471 | ||
1472 | bgp_table_unlock (bgp_connected_table[AFI_IP]); | |
1473 | bgp_connected_table[AFI_IP] = NULL; | |
1474 | ||
1475 | #ifdef HAVE_IPV6 | |
6c88b44d CC |
1476 | /* Only the current one needs to be reset. */ |
1477 | bgp_nexthop_cache_reset (bgp_nexthop_cache_table[AFI_IP6]); | |
1478 | ||
228da428 CC |
1479 | bgp_table_unlock (cache1_table[AFI_IP6]); |
1480 | cache1_table[AFI_IP6] = NULL; | |
1481 | ||
1482 | bgp_table_unlock (cache2_table[AFI_IP6]); | |
1483 | cache2_table[AFI_IP6] = NULL; | |
1484 | ||
1485 | bgp_table_unlock (bgp_connected_table[AFI_IP6]); | |
1486 | bgp_connected_table[AFI_IP6] = NULL; | |
1487 | #endif /* HAVE_IPV6 */ | |
1488 | } |