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718e3744 | 1 | /* |
2 | * OSPF routing table. | |
3 | * Copyright (C) 1999, 2000 Toshiaki Takada | |
4 | * | |
5 | * This file is part of GNU Zebra. | |
6 | * | |
7 | * GNU Zebra is free software; you can redistribute it and/or modify it | |
8 | * under the terms of the GNU General Public License as published by the | |
9 | * Free Software Foundation; either version 2, or (at your option) any | |
10 | * later version. | |
11 | * | |
12 | * GNU Zebra is distributed in the hope that it will be useful, but | |
13 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * General Public License for more details. | |
16 | * | |
896014f4 DL |
17 | * You should have received a copy of the GNU General Public License along |
18 | * with this program; see the file COPYING; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
718e3744 | 20 | */ |
21 | ||
22 | #include <zebra.h> | |
23 | ||
24 | #include "prefix.h" | |
25 | #include "table.h" | |
26 | #include "memory.h" | |
27 | #include "linklist.h" | |
28 | #include "log.h" | |
29 | #include "if.h" | |
30 | #include "command.h" | |
31 | #include "sockunion.h" | |
32 | ||
33 | #include "ospfd/ospfd.h" | |
34 | #include "ospfd/ospf_interface.h" | |
35 | #include "ospfd/ospf_asbr.h" | |
36 | #include "ospfd/ospf_lsa.h" | |
37 | #include "ospfd/ospf_route.h" | |
38 | #include "ospfd/ospf_spf.h" | |
39 | #include "ospfd/ospf_zebra.h" | |
40 | #include "ospfd/ospf_dump.h" | |
41 | ||
4d762f26 | 42 | struct ospf_route *ospf_route_new(void) |
718e3744 | 43 | { |
d62a17ae | 44 | struct ospf_route *new; |
718e3744 | 45 | |
d62a17ae | 46 | new = XCALLOC(MTYPE_OSPF_ROUTE, sizeof(struct ospf_route)); |
718e3744 | 47 | |
d62a17ae | 48 | new->paths = list_new(); |
49 | new->paths->del = (void (*)(void *))ospf_path_free; | |
718e3744 | 50 | |
d62a17ae | 51 | return new; |
718e3744 | 52 | } |
53 | ||
4d762f26 | 54 | void ospf_route_free(struct ospf_route *or) |
718e3744 | 55 | { |
d62a17ae | 56 | if (or->paths) |
6a154c88 | 57 | list_delete(& or->paths); |
718e3744 | 58 | |
d62a17ae | 59 | XFREE(MTYPE_OSPF_ROUTE, or); |
718e3744 | 60 | } |
61 | ||
4d762f26 | 62 | struct ospf_path *ospf_path_new(void) |
718e3744 | 63 | { |
d62a17ae | 64 | struct ospf_path *new; |
718e3744 | 65 | |
d62a17ae | 66 | new = XCALLOC(MTYPE_OSPF_PATH, sizeof(struct ospf_path)); |
718e3744 | 67 | |
d62a17ae | 68 | return new; |
718e3744 | 69 | } |
70 | ||
d62a17ae | 71 | static struct ospf_path *ospf_path_dup(struct ospf_path *path) |
718e3744 | 72 | { |
d62a17ae | 73 | struct ospf_path *new; |
718e3744 | 74 | |
d62a17ae | 75 | new = ospf_path_new(); |
76 | memcpy(new, path, sizeof(struct ospf_path)); | |
718e3744 | 77 | |
d62a17ae | 78 | return new; |
718e3744 | 79 | } |
80 | ||
d62a17ae | 81 | void ospf_path_free(struct ospf_path *op) |
718e3744 | 82 | { |
d62a17ae | 83 | XFREE(MTYPE_OSPF_PATH, op); |
718e3744 | 84 | } |
85 | ||
b5a8894d | 86 | void ospf_route_delete(struct ospf *ospf, struct route_table *rt) |
718e3744 | 87 | { |
d62a17ae | 88 | struct route_node *rn; |
89 | struct ospf_route * or ; | |
90 | ||
91 | for (rn = route_top(rt); rn; rn = route_next(rn)) | |
92 | if ((or = rn->info) != NULL) { | |
93 | if (or->type == OSPF_DESTINATION_NETWORK) | |
996c9314 LB |
94 | ospf_zebra_delete( |
95 | ospf, (struct prefix_ipv4 *)&rn->p, or); | |
d62a17ae | 96 | else if (or->type == OSPF_DESTINATION_DISCARD) |
996c9314 LB |
97 | ospf_zebra_delete_discard( |
98 | ospf, (struct prefix_ipv4 *)&rn->p); | |
d62a17ae | 99 | } |
718e3744 | 100 | } |
101 | ||
d62a17ae | 102 | void ospf_route_table_free(struct route_table *rt) |
718e3744 | 103 | { |
d62a17ae | 104 | struct route_node *rn; |
105 | struct ospf_route * or ; | |
718e3744 | 106 | |
d62a17ae | 107 | for (rn = route_top(rt); rn; rn = route_next(rn)) |
108 | if ((or = rn->info) != NULL) { | |
109 | ospf_route_free(or); | |
718e3744 | 110 | |
d62a17ae | 111 | rn->info = NULL; |
112 | route_unlock_node(rn); | |
113 | } | |
718e3744 | 114 | |
d62a17ae | 115 | route_table_finish(rt); |
718e3744 | 116 | } |
117 | ||
16a86b3e AB |
118 | /* If a prefix exists in the new routing table, then return 1, |
119 | otherwise return 0. Since the ZEBRA-RIB does an implicit | |
120 | withdraw, it is not necessary to send a delete, an add later | |
121 | will act like an implicit delete. */ | |
d62a17ae | 122 | static int ospf_route_exist_new_table(struct route_table *rt, |
123 | struct prefix_ipv4 *prefix) | |
16a86b3e | 124 | { |
d62a17ae | 125 | struct route_node *rn; |
16a86b3e | 126 | |
d62a17ae | 127 | assert(rt); |
128 | assert(prefix); | |
16a86b3e | 129 | |
d62a17ae | 130 | rn = route_node_lookup(rt, (struct prefix *)prefix); |
131 | if (!rn) { | |
132 | return 0; | |
133 | } | |
134 | route_unlock_node(rn); | |
16a86b3e | 135 | |
d62a17ae | 136 | if (!rn->info) { |
137 | return 0; | |
138 | } | |
16a86b3e | 139 | |
d62a17ae | 140 | return 1; |
16a86b3e AB |
141 | } |
142 | ||
7fd0729f G |
143 | static int ospf_route_backup_path_same(struct sr_nexthop_info *srni1, |
144 | struct sr_nexthop_info *srni2) | |
145 | { | |
146 | struct mpls_label_stack *ls1, *ls2; | |
147 | uint8_t label_count; | |
148 | ||
149 | ls1 = srni1->backup_label_stack; | |
150 | ls2 = srni2->backup_label_stack; | |
151 | ||
152 | if (!ls1 && !ls2) | |
153 | return 1; | |
154 | ||
155 | if ((ls1 && !ls2) || (!ls1 && ls2)) | |
156 | return 0; | |
157 | ||
158 | if (ls1->num_labels != ls2->num_labels) | |
159 | return 0; | |
160 | ||
161 | for (label_count = 0; label_count < ls1->num_labels; label_count++) { | |
162 | if (ls1->label[label_count] != ls2->label[label_count]) | |
163 | return 0; | |
164 | } | |
165 | ||
166 | if (!IPV4_ADDR_SAME(&srni1->backup_nexthop, &srni2->backup_nexthop)) | |
167 | return 0; | |
168 | ||
169 | return 1; | |
170 | } | |
171 | ||
718e3744 | 172 | /* If a prefix and a nexthop match any route in the routing table, |
173 | then return 1, otherwise return 0. */ | |
d62a17ae | 174 | int ospf_route_match_same(struct route_table *rt, struct prefix_ipv4 *prefix, |
175 | struct ospf_route *newor) | |
718e3744 | 176 | { |
d62a17ae | 177 | struct route_node *rn; |
178 | struct ospf_route * or ; | |
179 | struct ospf_path *op; | |
180 | struct ospf_path *newop; | |
181 | struct listnode *n1; | |
182 | struct listnode *n2; | |
183 | ||
184 | if (!rt || !prefix) | |
185 | return 0; | |
186 | ||
187 | rn = route_node_lookup(rt, (struct prefix *)prefix); | |
188 | if (!rn || !rn->info) | |
189 | return 0; | |
190 | ||
191 | route_unlock_node(rn); | |
192 | ||
193 | or = rn->info; | |
194 | if (or->type == newor->type && or->cost == newor->cost) { | |
195 | if (or->type == OSPF_DESTINATION_NETWORK) { | |
196 | if (or->paths->count != newor->paths->count) | |
197 | return 0; | |
198 | ||
199 | /* Check each path. */ | |
200 | for (n1 = listhead(or->paths), | |
201 | n2 = listhead(newor->paths); | |
39050c7e | 202 | n1 && n2; n1 = listnextnode_unchecked(n1), |
203 | n2 = listnextnode_unchecked(n2)) { | |
d62a17ae | 204 | op = listgetdata(n1); |
205 | newop = listgetdata(n2); | |
206 | ||
207 | if (!IPV4_ADDR_SAME(&op->nexthop, | |
208 | &newop->nexthop)) | |
209 | return 0; | |
210 | if (op->ifindex != newop->ifindex) | |
211 | return 0; | |
7fd0729f G |
212 | |
213 | /* check TI-LFA backup paths */ | |
214 | if (!ospf_route_backup_path_same(&op->srni, | |
215 | &newop->srni)) | |
216 | return 0; | |
d62a17ae | 217 | } |
218 | return 1; | |
219 | } else if (prefix_same(&rn->p, (struct prefix *)prefix)) | |
220 | return 1; | |
221 | } | |
222 | return 0; | |
718e3744 | 223 | } |
224 | ||
6d1fab63 | 225 | /* delete routes generated from AS-External routes if there is a inter/intra |
226 | * area route | |
227 | */ | |
b5a8894d CS |
228 | static void ospf_route_delete_same_ext(struct ospf *ospf, |
229 | struct route_table *external_routes, | |
d62a17ae | 230 | struct route_table *routes) |
6d1fab63 | 231 | { |
d62a17ae | 232 | struct route_node *rn, *ext_rn; |
233 | ||
234 | if ((external_routes == NULL) || (routes == NULL)) | |
235 | return; | |
236 | ||
237 | /* Remove deleted routes */ | |
238 | for (rn = route_top(routes); rn; rn = route_next(rn)) { | |
239 | if (rn && rn->info) { | |
240 | struct prefix_ipv4 *p = (struct prefix_ipv4 *)(&rn->p); | |
241 | if ((ext_rn = route_node_lookup(external_routes, | |
242 | (struct prefix *)p))) { | |
243 | if (ext_rn->info) { | |
b5a8894d CS |
244 | ospf_zebra_delete(ospf, p, |
245 | ext_rn->info); | |
d62a17ae | 246 | ospf_route_free(ext_rn->info); |
247 | ext_rn->info = NULL; | |
248 | } | |
249 | route_unlock_node(ext_rn); | |
250 | } | |
251 | } | |
252 | } | |
6d1fab63 | 253 | } |
254 | ||
718e3744 | 255 | /* rt: Old, cmprt: New */ |
b5a8894d | 256 | static void ospf_route_delete_uniq(struct ospf *ospf, struct route_table *rt, |
d62a17ae | 257 | struct route_table *cmprt) |
718e3744 | 258 | { |
d62a17ae | 259 | struct route_node *rn; |
260 | struct ospf_route * or ; | |
261 | ||
262 | for (rn = route_top(rt); rn; rn = route_next(rn)) | |
263 | if ((or = rn->info) != NULL) | |
264 | if (or->path_type == OSPF_PATH_INTRA_AREA || | |
265 | or->path_type == OSPF_PATH_INTER_AREA) { | |
266 | if (or->type == OSPF_DESTINATION_NETWORK) { | |
267 | if (!ospf_route_exist_new_table( | |
9d303b37 DL |
268 | cmprt, |
269 | (struct prefix_ipv4 *)&rn | |
270 | ->p)) | |
996c9314 LB |
271 | ospf_zebra_delete( |
272 | ospf, | |
d62a17ae | 273 | (struct prefix_ipv4 |
274 | *)&rn->p, | |
275 | or); | |
276 | } else if (or->type == OSPF_DESTINATION_DISCARD) | |
277 | if (!ospf_route_exist_new_table( | |
9d303b37 DL |
278 | cmprt, |
279 | (struct prefix_ipv4 *)&rn | |
280 | ->p)) | |
996c9314 LB |
281 | ospf_zebra_delete_discard( |
282 | ospf, | |
d62a17ae | 283 | (struct prefix_ipv4 |
284 | *)&rn->p); | |
285 | } | |
718e3744 | 286 | } |
287 | ||
288 | /* Install routes to table. */ | |
d62a17ae | 289 | void ospf_route_install(struct ospf *ospf, struct route_table *rt) |
718e3744 | 290 | { |
d62a17ae | 291 | struct route_node *rn; |
292 | struct ospf_route * or ; | |
293 | ||
294 | /* rt contains new routing table, new_table contains an old one. | |
295 | updating pointers */ | |
296 | if (ospf->old_table) | |
297 | ospf_route_table_free(ospf->old_table); | |
298 | ||
299 | ospf->old_table = ospf->new_table; | |
300 | ospf->new_table = rt; | |
301 | ||
302 | /* Delete old routes. */ | |
303 | if (ospf->old_table) | |
b5a8894d | 304 | ospf_route_delete_uniq(ospf, ospf->old_table, rt); |
d62a17ae | 305 | if (ospf->old_external_route) |
b5a8894d | 306 | ospf_route_delete_same_ext(ospf, ospf->old_external_route, rt); |
d62a17ae | 307 | |
308 | /* Install new routes. */ | |
309 | for (rn = route_top(rt); rn; rn = route_next(rn)) | |
310 | if ((or = rn->info) != NULL) { | |
311 | if (or->type == OSPF_DESTINATION_NETWORK) { | |
312 | if (!ospf_route_match_same( | |
313 | ospf->old_table, | |
314 | (struct prefix_ipv4 *)&rn->p, or)) | |
996c9314 LB |
315 | ospf_zebra_add( |
316 | ospf, | |
d62a17ae | 317 | (struct prefix_ipv4 *)&rn->p, |
318 | or); | |
319 | } else if (or->type == OSPF_DESTINATION_DISCARD) | |
320 | if (!ospf_route_match_same( | |
321 | ospf->old_table, | |
322 | (struct prefix_ipv4 *)&rn->p, or)) | |
996c9314 LB |
323 | ospf_zebra_add_discard( |
324 | ospf, | |
d62a17ae | 325 | (struct prefix_ipv4 *)&rn->p); |
326 | } | |
718e3744 | 327 | } |
328 | ||
718e3744 | 329 | /* RFC2328 16.1. (4). For "router". */ |
d62a17ae | 330 | void ospf_intra_add_router(struct route_table *rt, struct vertex *v, |
331 | struct ospf_area *area) | |
718e3744 | 332 | { |
d62a17ae | 333 | struct route_node *rn; |
334 | struct ospf_route * or ; | |
335 | struct prefix_ipv4 p; | |
336 | struct router_lsa *lsa; | |
337 | ||
338 | if (IS_DEBUG_OSPF_EVENT) | |
339 | zlog_debug("ospf_intra_add_router: Start"); | |
340 | ||
341 | lsa = (struct router_lsa *)v->lsa; | |
342 | ||
343 | if (IS_DEBUG_OSPF_EVENT) | |
96b663a3 MS |
344 | zlog_debug("ospf_intra_add_router: LS ID: %pI4", |
345 | &lsa->header.id); | |
d62a17ae | 346 | |
347 | if (!OSPF_IS_AREA_BACKBONE(area)) | |
348 | ospf_vl_up_check(area, lsa->header.id, v); | |
349 | ||
350 | if (!CHECK_FLAG(lsa->flags, ROUTER_LSA_SHORTCUT)) | |
351 | area->shortcut_capability = 0; | |
352 | ||
353 | /* If the newly added vertex is an area border router or AS boundary | |
354 | router, a routing table entry is added whose destination type is | |
355 | "router". */ | |
356 | if (!IS_ROUTER_LSA_BORDER(lsa) && !IS_ROUTER_LSA_EXTERNAL(lsa)) { | |
357 | if (IS_DEBUG_OSPF_EVENT) | |
358 | zlog_debug( | |
3efd0893 | 359 | "ospf_intra_add_router: this router is neither ASBR nor ABR, skipping it"); |
d62a17ae | 360 | return; |
361 | } | |
362 | ||
363 | /* Update ABR and ASBR count in this area. */ | |
364 | if (IS_ROUTER_LSA_BORDER(lsa)) | |
365 | area->abr_count++; | |
366 | if (IS_ROUTER_LSA_EXTERNAL(lsa)) | |
367 | area->asbr_count++; | |
368 | ||
369 | /* The Options field found in the associated router-LSA is copied | |
370 | into the routing table entry's Optional capabilities field. Call | |
371 | the newly added vertex Router X. */ | |
372 | or = ospf_route_new(); | |
373 | ||
374 | or->id = v->id; | |
375 | or->u.std.area_id = area->area_id; | |
376 | or->u.std.external_routing = area->external_routing; | |
377 | or->path_type = OSPF_PATH_INTRA_AREA; | |
378 | or->cost = v->distance; | |
379 | or->type = OSPF_DESTINATION_ROUTER; | |
380 | or->u.std.origin = (struct lsa_header *)lsa; | |
381 | or->u.std.options = lsa->header.options; | |
382 | or->u.std.flags = lsa->flags; | |
383 | ||
384 | /* If Router X is the endpoint of one of the calculating router's | |
385 | virtual links, and the virtual link uses Area A as Transit area: | |
386 | the virtual link is declared up, the IP address of the virtual | |
387 | interface is set to the IP address of the outgoing interface | |
388 | calculated above for Router X, and the virtual neighbor's IP | |
389 | address is set to Router X's interface address (contained in | |
390 | Router X's router-LSA) that points back to the root of the | |
391 | shortest- path tree; equivalently, this is the interface that | |
392 | points back to Router X's parent vertex on the shortest-path tree | |
393 | (similar to the calculation in Section 16.1.1). */ | |
394 | ||
395 | p.family = AF_INET; | |
396 | p.prefix = v->id; | |
397 | p.prefixlen = IPV4_MAX_BITLEN; | |
a6435618 | 398 | apply_mask_ipv4(&p); |
d62a17ae | 399 | |
400 | if (IS_DEBUG_OSPF_EVENT) | |
96b663a3 | 401 | zlog_debug("ospf_intra_add_router: talking about %pFX", &p); |
d62a17ae | 402 | |
403 | rn = route_node_get(rt, (struct prefix *)&p); | |
404 | ||
405 | /* Note that we keep all routes to ABRs and ASBRs, not only the best */ | |
406 | if (rn->info == NULL) | |
407 | rn->info = list_new(); | |
408 | else | |
409 | route_unlock_node(rn); | |
410 | ||
1d376ff5 | 411 | ospf_route_copy_nexthops_from_vertex(area, or, v); |
d62a17ae | 412 | |
413 | listnode_add(rn->info, or); | |
414 | ||
415 | if (IS_DEBUG_OSPF_EVENT) | |
416 | zlog_debug("ospf_intra_add_router: Stop"); | |
718e3744 | 417 | } |
418 | ||
419 | /* RFC2328 16.1. (4). For transit network. */ | |
d62a17ae | 420 | void ospf_intra_add_transit(struct route_table *rt, struct vertex *v, |
421 | struct ospf_area *area) | |
718e3744 | 422 | { |
d62a17ae | 423 | struct route_node *rn; |
424 | struct ospf_route * or ; | |
425 | struct prefix_ipv4 p; | |
426 | struct network_lsa *lsa; | |
427 | ||
428 | lsa = (struct network_lsa *)v->lsa; | |
429 | ||
430 | /* If the newly added vertex is a transit network, the routing table | |
431 | entry for the network is located. The entry's Destination ID is | |
432 | the IP network number, which can be obtained by masking the | |
433 | Vertex ID (Link State ID) with its associated subnet mask (found | |
434 | in the body of the associated network-LSA). */ | |
435 | p.family = AF_INET; | |
436 | p.prefix = v->id; | |
437 | p.prefixlen = ip_masklen(lsa->mask); | |
438 | apply_mask_ipv4(&p); | |
439 | ||
440 | rn = route_node_get(rt, (struct prefix *)&p); | |
441 | ||
442 | /* If the routing table entry already exists (i.e., there is already | |
443 | an intra-area route to the destination installed in the routing | |
444 | table), multiple vertices have mapped to the same IP network. | |
445 | For example, this can occur when a new Designated Router is being | |
446 | established. In this case, the current routing table entry | |
447 | should be overwritten if and only if the newly found path is just | |
448 | as short and the current routing table entry's Link State Origin | |
449 | has a smaller Link State ID than the newly added vertex' LSA. */ | |
450 | if (rn->info) { | |
451 | struct ospf_route *cur_or; | |
452 | ||
453 | route_unlock_node(rn); | |
454 | cur_or = rn->info; | |
455 | ||
456 | if (v->distance > cur_or->cost | |
457 | || IPV4_ADDR_CMP(&cur_or->u.std.origin->id, &lsa->header.id) | |
458 | > 0) | |
459 | return; | |
460 | ||
461 | ospf_route_free(rn->info); | |
462 | } | |
463 | ||
464 | or = ospf_route_new(); | |
465 | ||
466 | or->id = v->id; | |
467 | or->u.std.area_id = area->area_id; | |
468 | or->u.std.external_routing = area->external_routing; | |
469 | or->path_type = OSPF_PATH_INTRA_AREA; | |
470 | or->cost = v->distance; | |
471 | or->type = OSPF_DESTINATION_NETWORK; | |
472 | or->u.std.origin = (struct lsa_header *)lsa; | |
473 | ||
1d376ff5 | 474 | ospf_route_copy_nexthops_from_vertex(area, or, v); |
d62a17ae | 475 | |
476 | rn->info = or ; | |
718e3744 | 477 | } |
478 | ||
479 | /* RFC2328 16.1. second stage. */ | |
d62a17ae | 480 | void ospf_intra_add_stub(struct route_table *rt, struct router_lsa_link *link, |
481 | struct vertex *v, struct ospf_area *area, | |
482 | int parent_is_root, int lsa_pos) | |
718e3744 | 483 | { |
d7c0a89a | 484 | uint32_t cost; |
d62a17ae | 485 | struct route_node *rn; |
486 | struct ospf_route * or ; | |
487 | struct prefix_ipv4 p; | |
488 | struct router_lsa *lsa; | |
1d376ff5 | 489 | struct ospf_interface *oi = NULL; |
d62a17ae | 490 | struct ospf_path *path; |
491 | ||
492 | if (IS_DEBUG_OSPF_EVENT) | |
493 | zlog_debug("ospf_intra_add_stub(): Start"); | |
494 | ||
495 | lsa = (struct router_lsa *)v->lsa; | |
496 | ||
497 | p.family = AF_INET; | |
498 | p.prefix = link->link_id; | |
499 | p.prefixlen = ip_masklen(link->link_data); | |
500 | apply_mask_ipv4(&p); | |
501 | ||
502 | if (IS_DEBUG_OSPF_EVENT) | |
96b663a3 MS |
503 | zlog_debug("ospf_intra_add_stub(): processing route to %pFX", |
504 | &p); | |
d62a17ae | 505 | |
506 | /* (1) Calculate the distance D of stub network from the root. D is | |
507 | equal to the distance from the root to the router vertex | |
508 | (calculated in stage 1), plus the stub network link's advertised | |
509 | cost. */ | |
510 | cost = v->distance + ntohs(link->m[0].metric); | |
511 | ||
512 | if (IS_DEBUG_OSPF_EVENT) | |
513 | zlog_debug( | |
514 | "ospf_intra_add_stub(): calculated cost is %d + %d = %d", | |
515 | v->distance, ntohs(link->m[0].metric), cost); | |
516 | ||
517 | /* PtP links with /32 masks adds host routes to remote, directly | |
518 | * connected hosts, see RFC 2328, 12.4.1.1, Option 1. | |
519 | * Such routes can just be ignored for the sake of tidyness. | |
520 | */ | |
521 | if (parent_is_root && link->link_data.s_addr == 0xffffffff | |
522 | && ospf_if_lookup_by_local_addr(area->ospf, NULL, link->link_id)) { | |
523 | if (IS_DEBUG_OSPF_EVENT) | |
96b663a3 MS |
524 | zlog_debug("%s: ignoring host route %pI4/32 to self.", |
525 | __func__, &link->link_id); | |
d62a17ae | 526 | return; |
718e3744 | 527 | } |
528 | ||
d62a17ae | 529 | rn = route_node_get(rt, (struct prefix *)&p); |
718e3744 | 530 | |
d62a17ae | 531 | /* Lookup current routing table. */ |
532 | if (rn->info) { | |
533 | struct ospf_route *cur_or; | |
718e3744 | 534 | |
d62a17ae | 535 | route_unlock_node(rn); |
718e3744 | 536 | |
d62a17ae | 537 | cur_or = rn->info; |
718e3744 | 538 | |
d62a17ae | 539 | if (IS_DEBUG_OSPF_EVENT) |
540 | zlog_debug( | |
3efd0893 | 541 | "ospf_intra_add_stub(): another route to the same prefix found with cost %u", |
d62a17ae | 542 | cur_or->cost); |
543 | ||
544 | /* Compare this distance to the current best cost to the stub | |
545 | network. This is done by looking up the stub network's | |
546 | current routing table entry. If the calculated distance D is | |
547 | larger, go on to examine the next stub network link in the | |
548 | LSA. */ | |
549 | if (cost > cur_or->cost) { | |
550 | if (IS_DEBUG_OSPF_EVENT) | |
551 | zlog_debug( | |
552 | "ospf_intra_add_stub(): old route is better, exit"); | |
553 | return; | |
554 | } | |
718e3744 | 555 | |
d62a17ae | 556 | /* (2) If this step is reached, the stub network's routing table |
557 | entry must be updated. Calculate the set of next hops that | |
558 | would result from using the stub network link. This | |
559 | calculation is shown in Section 16.1.1; input to this | |
560 | calculation is the destination (the stub network) and the | |
561 | parent vertex (the router vertex). If the distance D is the | |
562 | same as the current routing table cost, simply add this set | |
563 | of next hops to the routing table entry's list of next hops. | |
564 | In this case, the routing table already has a Link State | |
565 | Origin. If this Link State Origin is a router-LSA whose Link | |
566 | State ID is smaller than V's Router ID, reset the Link State | |
567 | Origin to V's router-LSA. */ | |
568 | ||
569 | if (cost == cur_or->cost) { | |
570 | if (IS_DEBUG_OSPF_EVENT) | |
571 | zlog_debug( | |
572 | "ospf_intra_add_stub(): routes are equal, merge"); | |
573 | ||
1d376ff5 | 574 | ospf_route_copy_nexthops_from_vertex(area, cur_or, v); |
d62a17ae | 575 | |
576 | if (IPV4_ADDR_CMP(&cur_or->u.std.origin->id, | |
577 | &lsa->header.id) | |
578 | < 0) | |
579 | cur_or->u.std.origin = (struct lsa_header *)lsa; | |
580 | return; | |
581 | } | |
718e3744 | 582 | |
d62a17ae | 583 | /* Otherwise D is smaller than the routing table cost. |
584 | Overwrite the current routing table entry by setting the | |
585 | routing table entry's cost to D, and by setting the entry's | |
586 | list of next hops to the newly calculated set. Set the | |
587 | routing table entry's Link State Origin to V's router-LSA. | |
588 | Then go on to examine the next stub network link. */ | |
718e3744 | 589 | |
d62a17ae | 590 | if (cost < cur_or->cost) { |
591 | if (IS_DEBUG_OSPF_EVENT) | |
592 | zlog_debug( | |
593 | "ospf_intra_add_stub(): new route is better, set it"); | |
718e3744 | 594 | |
d62a17ae | 595 | cur_or->cost = cost; |
596 | ||
597 | list_delete_all_node(cur_or->paths); | |
598 | ||
1d376ff5 | 599 | ospf_route_copy_nexthops_from_vertex(area, cur_or, v); |
d62a17ae | 600 | |
601 | cur_or->u.std.origin = (struct lsa_header *)lsa; | |
602 | return; | |
603 | } | |
718e3744 | 604 | } |
d62a17ae | 605 | |
606 | if (IS_DEBUG_OSPF_EVENT) | |
607 | zlog_debug("ospf_intra_add_stub(): installing new route"); | |
608 | ||
609 | or = ospf_route_new(); | |
610 | ||
611 | or->id = v->id; | |
612 | or->u.std.area_id = area->area_id; | |
613 | or->u.std.external_routing = area->external_routing; | |
614 | or->path_type = OSPF_PATH_INTRA_AREA; | |
615 | or->cost = cost; | |
616 | or->type = OSPF_DESTINATION_NETWORK; | |
617 | or->u.std.origin = (struct lsa_header *)lsa; | |
618 | ||
619 | /* Nexthop is depend on connection type. */ | |
620 | if (v != area->spf) { | |
621 | if (IS_DEBUG_OSPF_EVENT) | |
622 | zlog_debug( | |
623 | "ospf_intra_add_stub(): this network is on remote router"); | |
1d376ff5 | 624 | ospf_route_copy_nexthops_from_vertex(area, or, v); |
d62a17ae | 625 | } else { |
626 | if (IS_DEBUG_OSPF_EVENT) | |
627 | zlog_debug( | |
628 | "ospf_intra_add_stub(): this network is on this router"); | |
629 | ||
1d376ff5 G |
630 | /* |
631 | * Only deal with interface data when we | |
632 | * don't do a dry run | |
633 | */ | |
634 | if (!area->spf_dry_run) | |
635 | oi = ospf_if_lookup_by_lsa_pos(area, lsa_pos); | |
636 | ||
637 | if (oi || area->spf_dry_run) { | |
d62a17ae | 638 | if (IS_DEBUG_OSPF_EVENT) |
639 | zlog_debug( | |
1d376ff5 G |
640 | "ospf_intra_add_stub(): the lsa pos is %d", |
641 | lsa_pos); | |
d62a17ae | 642 | |
643 | path = ospf_path_new(); | |
975a328e | 644 | path->nexthop.s_addr = INADDR_ANY; |
1d376ff5 G |
645 | |
646 | if (oi) { | |
647 | path->ifindex = oi->ifp->ifindex; | |
648 | if (CHECK_FLAG(oi->connected->flags, | |
649 | ZEBRA_IFA_UNNUMBERED)) | |
650 | path->unnumbered = 1; | |
651 | } | |
652 | ||
d62a17ae | 653 | listnode_add(or->paths, path); |
654 | } else { | |
655 | if (IS_DEBUG_OSPF_EVENT) | |
656 | zlog_debug( | |
657 | "ospf_intra_add_stub(): where's the interface ?"); | |
658 | } | |
718e3744 | 659 | } |
718e3744 | 660 | |
d62a17ae | 661 | rn->info = or ; |
718e3744 | 662 | |
d62a17ae | 663 | if (IS_DEBUG_OSPF_EVENT) |
664 | zlog_debug("ospf_intra_add_stub(): Stop"); | |
718e3744 | 665 | } |
666 | ||
2b64873d DL |
667 | static const char *const ospf_path_type_str[] = { |
668 | "unknown-type", "intra-area", "inter-area", "type1-external", | |
669 | "type2-external" | |
670 | }; | |
d62a17ae | 671 | |
672 | void ospf_route_table_dump(struct route_table *rt) | |
718e3744 | 673 | { |
d62a17ae | 674 | struct route_node *rn; |
675 | struct ospf_route * or ; | |
d62a17ae | 676 | struct listnode *pnode; |
677 | struct ospf_path *path; | |
718e3744 | 678 | |
d62a17ae | 679 | zlog_debug("========== OSPF routing table =========="); |
680 | for (rn = route_top(rt); rn; rn = route_next(rn)) | |
681 | if ((or = rn->info) != NULL) { | |
682 | if (or->type == OSPF_DESTINATION_NETWORK) { | |
d6951e5e DL |
683 | zlog_debug("N %-18pFX %-15pI4 %s %d", &rn->p, |
684 | &or->u.std.area_id, | |
d62a17ae | 685 | ospf_path_type_str[or->path_type], |
686 | or->cost); | |
687 | for (ALL_LIST_ELEMENTS_RO(or->paths, pnode, | |
688 | path)) | |
96b663a3 MS |
689 | zlog_debug(" -> %pI4", |
690 | &path->nexthop); | |
d62a17ae | 691 | } else |
d6951e5e DL |
692 | zlog_debug("R %-18pI4 %-15pI4 %s %d", |
693 | &rn->p.u.prefix4, | |
694 | &or->u.std.area_id, | |
d62a17ae | 695 | ospf_path_type_str[or->path_type], |
696 | or->cost); | |
697 | } | |
698 | zlog_debug("========================================"); | |
718e3744 | 699 | } |
700 | ||
718e3744 | 701 | /* This is 16.4.1 implementation. |
702 | o Intra-area paths using non-backbone areas are always the most preferred. | |
703 | o The other paths, intra-area backbone paths and inter-area paths, | |
704 | are of equal preference. */ | |
d62a17ae | 705 | static int ospf_asbr_route_cmp(struct ospf *ospf, struct ospf_route *r1, |
706 | struct ospf_route *r2) | |
718e3744 | 707 | { |
d7c0a89a | 708 | uint8_t r1_type, r2_type; |
718e3744 | 709 | |
d62a17ae | 710 | r1_type = r1->path_type; |
711 | r2_type = r2->path_type; | |
718e3744 | 712 | |
d62a17ae | 713 | /* r1/r2 itself is backbone, and it's Inter-area path. */ |
714 | if (OSPF_IS_AREA_ID_BACKBONE(r1->u.std.area_id)) | |
715 | r1_type = OSPF_PATH_INTER_AREA; | |
716 | if (OSPF_IS_AREA_ID_BACKBONE(r2->u.std.area_id)) | |
717 | r2_type = OSPF_PATH_INTER_AREA; | |
718e3744 | 718 | |
d62a17ae | 719 | return (r1_type - r2_type); |
718e3744 | 720 | } |
721 | ||
722 | /* Compare two routes. | |
723 | ret < 0 -- r1 is better. | |
724 | ret == 0 -- r1 and r2 are the same. | |
725 | ret > 0 -- r2 is better. */ | |
d62a17ae | 726 | int ospf_route_cmp(struct ospf *ospf, struct ospf_route *r1, |
727 | struct ospf_route *r2) | |
718e3744 | 728 | { |
d62a17ae | 729 | int ret = 0; |
730 | ||
731 | /* Path types of r1 and r2 are not the same. */ | |
732 | if ((ret = (r1->path_type - r2->path_type))) | |
733 | return ret; | |
734 | ||
735 | if (IS_DEBUG_OSPF_EVENT) | |
736 | zlog_debug("Route[Compare]: Path types are the same."); | |
737 | /* Path types are the same, compare any cost. */ | |
738 | switch (r1->path_type) { | |
739 | case OSPF_PATH_INTRA_AREA: | |
740 | case OSPF_PATH_INTER_AREA: | |
741 | break; | |
742 | case OSPF_PATH_TYPE1_EXTERNAL: | |
743 | if (!CHECK_FLAG(ospf->config, OSPF_RFC1583_COMPATIBLE)) { | |
744 | ret = ospf_asbr_route_cmp(ospf, r1->u.ext.asbr, | |
745 | r2->u.ext.asbr); | |
746 | if (ret != 0) | |
747 | return ret; | |
748 | } | |
749 | break; | |
750 | case OSPF_PATH_TYPE2_EXTERNAL: | |
751 | if ((ret = (r1->u.ext.type2_cost - r2->u.ext.type2_cost))) | |
752 | return ret; | |
753 | ||
754 | if (!CHECK_FLAG(ospf->config, OSPF_RFC1583_COMPATIBLE)) { | |
755 | ret = ospf_asbr_route_cmp(ospf, r1->u.ext.asbr, | |
756 | r2->u.ext.asbr); | |
757 | if (ret != 0) | |
758 | return ret; | |
759 | } | |
760 | break; | |
718e3744 | 761 | } |
718e3744 | 762 | |
d62a17ae | 763 | /* Anyway, compare the costs. */ |
764 | return (r1->cost - r2->cost); | |
718e3744 | 765 | } |
766 | ||
d62a17ae | 767 | static int ospf_path_exist(struct list *plist, struct in_addr nexthop, |
768 | struct ospf_interface *oi) | |
718e3744 | 769 | { |
d62a17ae | 770 | struct listnode *node, *nnode; |
771 | struct ospf_path *path; | |
718e3744 | 772 | |
d62a17ae | 773 | for (ALL_LIST_ELEMENTS(plist, node, nnode, path)) |
774 | if (IPV4_ADDR_SAME(&path->nexthop, &nexthop) | |
775 | && path->ifindex == oi->ifp->ifindex) | |
776 | return 1; | |
718e3744 | 777 | |
d62a17ae | 778 | return 0; |
718e3744 | 779 | } |
780 | ||
1d376ff5 G |
781 | void ospf_route_copy_nexthops_from_vertex(struct ospf_area *area, |
782 | struct ospf_route *to, | |
d62a17ae | 783 | struct vertex *v) |
718e3744 | 784 | { |
d62a17ae | 785 | struct listnode *node; |
786 | struct ospf_path *path; | |
787 | struct vertex_nexthop *nexthop; | |
788 | struct vertex_parent *vp; | |
1d376ff5 | 789 | struct ospf_interface *oi = NULL; |
d62a17ae | 790 | |
791 | assert(to->paths); | |
792 | ||
793 | for (ALL_LIST_ELEMENTS_RO(v->parents, node, vp)) { | |
794 | nexthop = vp->nexthop; | |
795 | ||
1d376ff5 G |
796 | /* |
797 | * Only deal with interface data when we | |
798 | * don't do a dry run | |
799 | */ | |
800 | if (!area->spf_dry_run) | |
801 | oi = ospf_if_lookup_by_lsa_pos(area, nexthop->lsa_pos); | |
802 | ||
803 | if ((oi && !ospf_path_exist(to->paths, nexthop->router, oi)) | |
804 | || area->spf_dry_run) { | |
805 | path = ospf_path_new(); | |
806 | path->nexthop = nexthop->router; | |
7fd0729f | 807 | path->adv_router = v->id; |
1d376ff5 G |
808 | |
809 | if (oi) { | |
810 | path->ifindex = oi->ifp->ifindex; | |
811 | if (CHECK_FLAG(oi->connected->flags, | |
d62a17ae | 812 | ZEBRA_IFA_UNNUMBERED)) |
813 | path->unnumbered = 1; | |
d62a17ae | 814 | } |
1d376ff5 G |
815 | |
816 | listnode_add(to->paths, path); | |
d62a17ae | 817 | } |
718e3744 | 818 | } |
718e3744 | 819 | } |
820 | ||
d62a17ae | 821 | struct ospf_path *ospf_path_lookup(struct list *plist, struct ospf_path *path) |
718e3744 | 822 | { |
d62a17ae | 823 | struct listnode *node; |
824 | struct ospf_path *op; | |
825 | ||
826 | for (ALL_LIST_ELEMENTS_RO(plist, node, op)) { | |
827 | if (!IPV4_ADDR_SAME(&op->nexthop, &path->nexthop)) | |
828 | continue; | |
829 | if (!IPV4_ADDR_SAME(&op->adv_router, &path->adv_router)) | |
830 | continue; | |
831 | if (op->ifindex != path->ifindex) | |
832 | continue; | |
833 | return op; | |
834 | } | |
835 | return NULL; | |
718e3744 | 836 | } |
837 | ||
d62a17ae | 838 | void ospf_route_copy_nexthops(struct ospf_route *to, struct list *from) |
718e3744 | 839 | { |
d62a17ae | 840 | struct listnode *node, *nnode; |
841 | struct ospf_path *path; | |
718e3744 | 842 | |
d62a17ae | 843 | assert(to->paths); |
718e3744 | 844 | |
d62a17ae | 845 | for (ALL_LIST_ELEMENTS(from, node, nnode, path)) |
846 | /* The same routes are just discarded. */ | |
847 | if (!ospf_path_lookup(to->paths, path)) | |
848 | listnode_add(to->paths, ospf_path_dup(path)); | |
718e3744 | 849 | } |
850 | ||
d62a17ae | 851 | void ospf_route_subst_nexthops(struct ospf_route *to, struct list *from) |
718e3744 | 852 | { |
718e3744 | 853 | |
d62a17ae | 854 | list_delete_all_node(to->paths); |
855 | ospf_route_copy_nexthops(to, from); | |
718e3744 | 856 | } |
857 | ||
d62a17ae | 858 | void ospf_route_subst(struct route_node *rn, struct ospf_route *new_or, |
859 | struct ospf_route *over) | |
718e3744 | 860 | { |
d62a17ae | 861 | route_lock_node(rn); |
862 | ospf_route_free(rn->info); | |
718e3744 | 863 | |
d62a17ae | 864 | ospf_route_copy_nexthops(new_or, over->paths); |
865 | rn->info = new_or; | |
866 | route_unlock_node(rn); | |
718e3744 | 867 | } |
868 | ||
d62a17ae | 869 | void ospf_route_add(struct route_table *rt, struct prefix_ipv4 *p, |
870 | struct ospf_route *new_or, struct ospf_route *over) | |
718e3744 | 871 | { |
d62a17ae | 872 | struct route_node *rn; |
718e3744 | 873 | |
d62a17ae | 874 | rn = route_node_get(rt, (struct prefix *)p); |
718e3744 | 875 | |
d62a17ae | 876 | ospf_route_copy_nexthops(new_or, over->paths); |
877 | ||
878 | if (rn->info) { | |
879 | if (IS_DEBUG_OSPF_EVENT) | |
880 | zlog_debug("ospf_route_add(): something's wrong !"); | |
881 | route_unlock_node(rn); | |
882 | return; | |
883 | } | |
718e3744 | 884 | |
d62a17ae | 885 | rn->info = new_or; |
886 | } | |
718e3744 | 887 | |
d62a17ae | 888 | void ospf_prune_unreachable_networks(struct route_table *rt) |
889 | { | |
890 | struct route_node *rn, *next; | |
891 | struct ospf_route * or ; | |
892 | ||
893 | if (IS_DEBUG_OSPF_EVENT) | |
894 | zlog_debug("Pruning unreachable networks"); | |
895 | ||
896 | for (rn = route_top(rt); rn; rn = next) { | |
897 | next = route_next(rn); | |
898 | if (rn->info != NULL) { | |
899 | or = rn->info; | |
900 | if (listcount(or->paths) == 0) { | |
901 | if (IS_DEBUG_OSPF_EVENT) | |
96b663a3 MS |
902 | zlog_debug("Pruning route to %pFX", |
903 | &rn->p); | |
d62a17ae | 904 | |
905 | ospf_route_free(or); | |
906 | rn->info = NULL; | |
907 | route_unlock_node(rn); | |
908 | } | |
909 | } | |
910 | } | |
718e3744 | 911 | } |
912 | ||
d62a17ae | 913 | void ospf_prune_unreachable_routers(struct route_table *rtrs) |
718e3744 | 914 | { |
d62a17ae | 915 | struct route_node *rn, *next; |
916 | struct ospf_route * or ; | |
917 | struct listnode *node, *nnode; | |
918 | struct list *paths; | |
919 | ||
920 | if (IS_DEBUG_OSPF_EVENT) | |
921 | zlog_debug("Pruning unreachable routers"); | |
922 | ||
923 | for (rn = route_top(rtrs); rn; rn = next) { | |
924 | next = route_next(rn); | |
925 | if ((paths = rn->info) == NULL) | |
926 | continue; | |
927 | ||
928 | for (ALL_LIST_ELEMENTS(paths, node, nnode, or)) { | |
929 | if (listcount(or->paths) == 0) { | |
930 | if (IS_DEBUG_OSPF_EVENT) { | |
96b663a3 MS |
931 | zlog_debug("Pruning route to rtr %pI4", |
932 | &rn->p.u.prefix4); | |
d62a17ae | 933 | zlog_debug( |
96b663a3 MS |
934 | " via area %pI4", |
935 | &or->u.std.area_id); | |
d62a17ae | 936 | } |
937 | ||
938 | listnode_delete(paths, or); | |
939 | ospf_route_free(or); | |
940 | } | |
941 | } | |
718e3744 | 942 | |
d62a17ae | 943 | if (listcount(paths) == 0) { |
944 | if (IS_DEBUG_OSPF_EVENT) | |
96b663a3 MS |
945 | zlog_debug("Pruning router node %pI4", |
946 | &rn->p.u.prefix4); | |
718e3744 | 947 | |
6a154c88 | 948 | list_delete(&paths); |
d62a17ae | 949 | rn->info = NULL; |
950 | route_unlock_node(rn); | |
951 | } | |
718e3744 | 952 | } |
718e3744 | 953 | } |
954 | ||
b5a8894d | 955 | int ospf_add_discard_route(struct ospf *ospf, struct route_table *rt, |
996c9314 | 956 | struct ospf_area *area, struct prefix_ipv4 *p) |
718e3744 | 957 | { |
d62a17ae | 958 | struct route_node *rn; |
959 | struct ospf_route * or, *new_or; | |
718e3744 | 960 | |
d62a17ae | 961 | rn = route_node_get(rt, (struct prefix *)p); |
718e3744 | 962 | |
d62a17ae | 963 | if (rn == NULL) { |
964 | if (IS_DEBUG_OSPF_EVENT) | |
965 | zlog_debug( | |
966 | "ospf_add_discard_route(): router installation error"); | |
967 | return 0; | |
968 | } | |
718e3744 | 969 | |
d62a17ae | 970 | if (rn->info) /* If the route to the same destination is found */ |
718e3744 | 971 | { |
d62a17ae | 972 | route_unlock_node(rn); |
718e3744 | 973 | |
d62a17ae | 974 | or = rn->info; |
718e3744 | 975 | |
d62a17ae | 976 | if (or->path_type == OSPF_PATH_INTRA_AREA) { |
977 | if (IS_DEBUG_OSPF_EVENT) | |
978 | zlog_debug( | |
3efd0893 | 979 | "ospf_add_discard_route(): an intra-area route exists"); |
d62a17ae | 980 | return 0; |
981 | } | |
718e3744 | 982 | |
d62a17ae | 983 | if (or->type == OSPF_DESTINATION_DISCARD) { |
984 | if (IS_DEBUG_OSPF_EVENT) | |
985 | zlog_debug( | |
3efd0893 | 986 | "ospf_add_discard_route(): discard entry already installed"); |
d62a17ae | 987 | return 0; |
988 | } | |
718e3744 | 989 | |
d62a17ae | 990 | ospf_route_free(rn->info); |
991 | } | |
718e3744 | 992 | |
d62a17ae | 993 | if (IS_DEBUG_OSPF_EVENT) |
ae32e1c2 | 994 | zlog_debug("ospf_add_discard_route(): adding %pFX", p); |
718e3744 | 995 | |
d62a17ae | 996 | new_or = ospf_route_new(); |
997 | new_or->type = OSPF_DESTINATION_DISCARD; | |
975a328e | 998 | new_or->id.s_addr = INADDR_ANY; |
d62a17ae | 999 | new_or->cost = 0; |
1000 | new_or->u.std.area_id = area->area_id; | |
1001 | new_or->u.std.external_routing = area->external_routing; | |
1002 | new_or->path_type = OSPF_PATH_INTER_AREA; | |
1003 | rn->info = new_or; | |
718e3744 | 1004 | |
b5a8894d | 1005 | ospf_zebra_add_discard(ospf, p); |
718e3744 | 1006 | |
d62a17ae | 1007 | return 1; |
1008 | } | |
718e3744 | 1009 | |
b5a8894d CS |
1010 | void ospf_delete_discard_route(struct ospf *ospf, struct route_table *rt, |
1011 | struct prefix_ipv4 *p) | |
d62a17ae | 1012 | { |
1013 | struct route_node *rn; | |
1014 | struct ospf_route * or ; | |
1015 | ||
1016 | if (IS_DEBUG_OSPF_EVENT) | |
ae32e1c2 | 1017 | zlog_debug("ospf_delete_discard_route(): deleting %pFX", p); |
d62a17ae | 1018 | |
1019 | rn = route_node_lookup(rt, (struct prefix *)p); | |
1020 | ||
1021 | if (rn == NULL) { | |
1022 | if (IS_DEBUG_OSPF_EVENT) | |
1023 | zlog_debug( | |
1024 | "ospf_delete_discard_route(): no route found"); | |
1025 | return; | |
718e3744 | 1026 | } |
1027 | ||
d62a17ae | 1028 | or = rn->info; |
1029 | ||
1030 | if (or->path_type == OSPF_PATH_INTRA_AREA) { | |
1031 | if (IS_DEBUG_OSPF_EVENT) | |
1032 | zlog_debug( | |
3efd0893 | 1033 | "ospf_delete_discard_route(): an intra-area route exists"); |
d62a17ae | 1034 | return; |
718e3744 | 1035 | } |
1036 | ||
d62a17ae | 1037 | if (or->type != OSPF_DESTINATION_DISCARD) { |
1038 | if (IS_DEBUG_OSPF_EVENT) | |
1039 | zlog_debug( | |
3efd0893 | 1040 | "ospf_delete_discard_route(): not a discard entry"); |
d62a17ae | 1041 | return; |
1042 | } | |
718e3744 | 1043 | |
d62a17ae | 1044 | /* free the route entry and the route node */ |
1045 | ospf_route_free(rn->info); | |
8fc9e007 | 1046 | |
d62a17ae | 1047 | rn->info = NULL; |
1048 | route_unlock_node(rn); | |
1049 | route_unlock_node(rn); | |
718e3744 | 1050 | |
d62a17ae | 1051 | /* remove the discard entry from the rib */ |
b5a8894d | 1052 | ospf_zebra_delete_discard(ospf, p); |
718e3744 | 1053 | |
d62a17ae | 1054 | return; |
718e3744 | 1055 | } |