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Commit | Line | Data |
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718e3744 | 1 | /* |
2 | * OSPF ABR functions. | |
3 | * Copyright (C) 1999, 2000 Alex Zinin, 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. | |
896014f4 | 11 | * |
718e3744 | 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. | |
896014f4 DL |
16 | * |
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 | ||
23 | #include <zebra.h> | |
24 | ||
25 | #include "thread.h" | |
26 | #include "memory.h" | |
27 | #include "linklist.h" | |
28 | #include "prefix.h" | |
29 | #include "if.h" | |
30 | #include "table.h" | |
31 | #include "vty.h" | |
32 | #include "filter.h" | |
33 | #include "plist.h" | |
34 | #include "log.h" | |
35 | ||
36 | #include "ospfd/ospfd.h" | |
37 | #include "ospfd/ospf_interface.h" | |
38 | #include "ospfd/ospf_ism.h" | |
39 | #include "ospfd/ospf_asbr.h" | |
40 | #include "ospfd/ospf_lsa.h" | |
41 | #include "ospfd/ospf_lsdb.h" | |
42 | #include "ospfd/ospf_neighbor.h" | |
43 | #include "ospfd/ospf_nsm.h" | |
44 | #include "ospfd/ospf_spf.h" | |
45 | #include "ospfd/ospf_route.h" | |
46 | #include "ospfd/ospf_ia.h" | |
47 | #include "ospfd/ospf_flood.h" | |
48 | #include "ospfd/ospf_abr.h" | |
49 | #include "ospfd/ospf_ase.h" | |
50 | #include "ospfd/ospf_zebra.h" | |
51 | #include "ospfd/ospf_dump.h" | |
6b0655a2 | 52 | |
d62a17ae | 53 | static struct ospf_area_range *ospf_area_range_new(struct prefix_ipv4 *p) |
718e3744 | 54 | { |
d62a17ae | 55 | struct ospf_area_range *range; |
718e3744 | 56 | |
d62a17ae | 57 | range = XCALLOC(MTYPE_OSPF_AREA_RANGE, sizeof(struct ospf_area_range)); |
58 | range->addr = p->prefix; | |
59 | range->masklen = p->prefixlen; | |
60 | range->cost_config = OSPF_AREA_RANGE_COST_UNSPEC; | |
718e3744 | 61 | |
d62a17ae | 62 | return range; |
718e3744 | 63 | } |
64 | ||
d62a17ae | 65 | static void ospf_area_range_free(struct ospf_area_range *range) |
718e3744 | 66 | { |
d62a17ae | 67 | XFREE(MTYPE_OSPF_AREA_RANGE, range); |
718e3744 | 68 | } |
69 | ||
d62a17ae | 70 | static void ospf_area_range_add(struct ospf_area *area, |
71 | struct ospf_area_range *range) | |
718e3744 | 72 | { |
d62a17ae | 73 | struct route_node *rn; |
74 | struct prefix_ipv4 p; | |
75 | ||
76 | p.family = AF_INET; | |
77 | p.prefixlen = range->masklen; | |
78 | p.prefix = range->addr; | |
79 | ||
80 | rn = route_node_get(area->ranges, (struct prefix *)&p); | |
81 | if (rn->info) | |
82 | route_unlock_node(rn); | |
83 | else | |
84 | rn->info = range; | |
718e3744 | 85 | } |
86 | ||
d62a17ae | 87 | static void ospf_area_range_delete(struct ospf_area *area, |
88 | struct route_node *rn) | |
718e3744 | 89 | { |
d62a17ae | 90 | struct ospf_area_range *range = rn->info; |
718e3744 | 91 | |
d62a17ae | 92 | if (range->specifics != 0) |
93 | ospf_delete_discard_route(area->ospf->new_table, | |
94 | (struct prefix_ipv4 *)&rn->p); | |
718e3744 | 95 | |
d62a17ae | 96 | ospf_area_range_free(range); |
97 | rn->info = NULL; | |
98 | route_unlock_node(rn); | |
99 | route_unlock_node(rn); | |
718e3744 | 100 | } |
101 | ||
d62a17ae | 102 | struct ospf_area_range *ospf_area_range_lookup(struct ospf_area *area, |
103 | struct prefix_ipv4 *p) | |
718e3744 | 104 | { |
d62a17ae | 105 | struct route_node *rn; |
106 | ||
107 | rn = route_node_lookup(area->ranges, (struct prefix *)p); | |
108 | if (rn) { | |
109 | route_unlock_node(rn); | |
110 | return rn->info; | |
111 | } | |
112 | return NULL; | |
718e3744 | 113 | } |
114 | ||
d62a17ae | 115 | struct ospf_area_range *ospf_area_range_lookup_next(struct ospf_area *area, |
116 | struct in_addr *range_net, | |
117 | int first) | |
718e3744 | 118 | { |
d62a17ae | 119 | struct route_node *rn; |
120 | struct prefix_ipv4 p; | |
121 | struct ospf_area_range *find; | |
122 | ||
123 | p.family = AF_INET; | |
124 | p.prefixlen = IPV4_MAX_BITLEN; | |
125 | p.prefix = *range_net; | |
126 | ||
127 | if (first) | |
128 | rn = route_top(area->ranges); | |
129 | else { | |
130 | rn = route_node_get(area->ranges, (struct prefix *)&p); | |
131 | rn = route_next(rn); | |
132 | } | |
133 | ||
134 | for (; rn; rn = route_next(rn)) | |
135 | if (rn->info) | |
136 | break; | |
137 | ||
138 | if (rn && rn->info) { | |
139 | find = rn->info; | |
140 | *range_net = rn->p.u.prefix4; | |
141 | route_unlock_node(rn); | |
142 | return find; | |
143 | } | |
144 | return NULL; | |
718e3744 | 145 | } |
146 | ||
d62a17ae | 147 | static struct ospf_area_range *ospf_area_range_match(struct ospf_area *area, |
148 | struct prefix_ipv4 *p) | |
718e3744 | 149 | { |
d62a17ae | 150 | struct route_node *node; |
151 | ||
152 | node = route_node_match(area->ranges, (struct prefix *)p); | |
153 | if (node) { | |
154 | route_unlock_node(node); | |
155 | return node->info; | |
156 | } | |
157 | return NULL; | |
718e3744 | 158 | } |
159 | ||
d62a17ae | 160 | struct ospf_area_range *ospf_area_range_match_any(struct ospf *ospf, |
161 | struct prefix_ipv4 *p) | |
718e3744 | 162 | { |
d62a17ae | 163 | struct ospf_area_range *range; |
164 | struct ospf_area *area; | |
165 | struct listnode *node; | |
718e3744 | 166 | |
d62a17ae | 167 | for (ALL_LIST_ELEMENTS_RO(ospf->areas, node, area)) |
168 | if ((range = ospf_area_range_match(area, p))) | |
169 | return range; | |
718e3744 | 170 | |
d62a17ae | 171 | return NULL; |
718e3744 | 172 | } |
173 | ||
d62a17ae | 174 | int ospf_area_range_active(struct ospf_area_range *range) |
718e3744 | 175 | { |
d62a17ae | 176 | return range->specifics; |
718e3744 | 177 | } |
178 | ||
d62a17ae | 179 | static int ospf_area_actively_attached(struct ospf_area *area) |
718e3744 | 180 | { |
d62a17ae | 181 | return area->act_ints; |
718e3744 | 182 | } |
183 | ||
d62a17ae | 184 | int ospf_area_range_set(struct ospf *ospf, struct in_addr area_id, |
185 | struct prefix_ipv4 *p, int advertise) | |
718e3744 | 186 | { |
d62a17ae | 187 | struct ospf_area *area; |
188 | struct ospf_area_range *range; | |
189 | ||
190 | area = ospf_area_get(ospf, area_id); | |
191 | if (area == NULL) | |
192 | return 0; | |
193 | ||
194 | range = ospf_area_range_lookup(area, p); | |
195 | if (range != NULL) { | |
196 | if ((CHECK_FLAG(range->flags, OSPF_AREA_RANGE_ADVERTISE) | |
197 | && !CHECK_FLAG(advertise, OSPF_AREA_RANGE_ADVERTISE)) | |
198 | || (!CHECK_FLAG(range->flags, OSPF_AREA_RANGE_ADVERTISE) | |
199 | && CHECK_FLAG(advertise, OSPF_AREA_RANGE_ADVERTISE))) | |
200 | ospf_schedule_abr_task(ospf); | |
201 | } else { | |
202 | range = ospf_area_range_new(p); | |
203 | ospf_area_range_add(area, range); | |
204 | ospf_schedule_abr_task(ospf); | |
205 | } | |
206 | ||
207 | if (CHECK_FLAG(advertise, OSPF_AREA_RANGE_ADVERTISE)) | |
208 | SET_FLAG(range->flags, OSPF_AREA_RANGE_ADVERTISE); | |
209 | else | |
210 | UNSET_FLAG(range->flags, OSPF_AREA_RANGE_ADVERTISE); | |
211 | ||
212 | return 1; | |
718e3744 | 213 | } |
214 | ||
d62a17ae | 215 | int ospf_area_range_cost_set(struct ospf *ospf, struct in_addr area_id, |
216 | struct prefix_ipv4 *p, u_int32_t cost) | |
718e3744 | 217 | { |
d62a17ae | 218 | struct ospf_area *area; |
219 | struct ospf_area_range *range; | |
718e3744 | 220 | |
d62a17ae | 221 | area = ospf_area_get(ospf, area_id); |
222 | if (area == NULL) | |
223 | return 0; | |
718e3744 | 224 | |
d62a17ae | 225 | range = ospf_area_range_lookup(area, p); |
226 | if (range == NULL) | |
227 | return 0; | |
718e3744 | 228 | |
d62a17ae | 229 | if (range->cost_config != cost) { |
230 | range->cost_config = cost; | |
231 | if (ospf_area_range_active(range)) | |
232 | ospf_schedule_abr_task(ospf); | |
233 | } | |
718e3744 | 234 | |
d62a17ae | 235 | return 1; |
718e3744 | 236 | } |
237 | ||
d62a17ae | 238 | int ospf_area_range_unset(struct ospf *ospf, struct in_addr area_id, |
239 | struct prefix_ipv4 *p) | |
718e3744 | 240 | { |
d62a17ae | 241 | struct ospf_area *area; |
242 | struct route_node *rn; | |
718e3744 | 243 | |
d62a17ae | 244 | area = ospf_area_lookup_by_area_id(ospf, area_id); |
245 | if (area == NULL) | |
246 | return 0; | |
718e3744 | 247 | |
d62a17ae | 248 | rn = route_node_lookup(area->ranges, (struct prefix *)p); |
249 | if (rn == NULL) | |
250 | return 0; | |
718e3744 | 251 | |
d62a17ae | 252 | if (ospf_area_range_active(rn->info)) |
253 | ospf_schedule_abr_task(ospf); | |
718e3744 | 254 | |
d62a17ae | 255 | ospf_area_range_delete(area, rn); |
718e3744 | 256 | |
d62a17ae | 257 | return 1; |
718e3744 | 258 | } |
259 | ||
d62a17ae | 260 | int ospf_area_range_substitute_set(struct ospf *ospf, struct in_addr area_id, |
261 | struct prefix_ipv4 *p, struct prefix_ipv4 *s) | |
718e3744 | 262 | { |
d62a17ae | 263 | struct ospf_area *area; |
264 | struct ospf_area_range *range; | |
265 | ||
266 | area = ospf_area_get(ospf, area_id); | |
267 | range = ospf_area_range_lookup(area, p); | |
268 | ||
269 | if (range != NULL) { | |
270 | if (!CHECK_FLAG(range->flags, OSPF_AREA_RANGE_ADVERTISE) | |
271 | || !CHECK_FLAG(range->flags, OSPF_AREA_RANGE_SUBSTITUTE)) | |
272 | ospf_schedule_abr_task(ospf); | |
273 | } else { | |
274 | range = ospf_area_range_new(p); | |
275 | ospf_area_range_add(area, range); | |
276 | ospf_schedule_abr_task(ospf); | |
277 | } | |
278 | ||
279 | SET_FLAG(range->flags, OSPF_AREA_RANGE_ADVERTISE); | |
280 | SET_FLAG(range->flags, OSPF_AREA_RANGE_SUBSTITUTE); | |
281 | range->subst_addr = s->prefix; | |
282 | range->subst_masklen = s->prefixlen; | |
283 | ||
284 | return 1; | |
718e3744 | 285 | } |
286 | ||
d62a17ae | 287 | int ospf_area_range_substitute_unset(struct ospf *ospf, struct in_addr area_id, |
288 | struct prefix_ipv4 *p) | |
718e3744 | 289 | { |
d62a17ae | 290 | struct ospf_area *area; |
291 | struct ospf_area_range *range; | |
718e3744 | 292 | |
d62a17ae | 293 | area = ospf_area_lookup_by_area_id(ospf, area_id); |
294 | if (area == NULL) | |
295 | return 0; | |
718e3744 | 296 | |
d62a17ae | 297 | range = ospf_area_range_lookup(area, p); |
298 | if (range == NULL) | |
299 | return 0; | |
718e3744 | 300 | |
d62a17ae | 301 | if (CHECK_FLAG(range->flags, OSPF_AREA_RANGE_SUBSTITUTE)) |
302 | if (ospf_area_range_active(range)) | |
303 | ospf_schedule_abr_task(ospf); | |
718e3744 | 304 | |
d62a17ae | 305 | UNSET_FLAG(range->flags, OSPF_AREA_RANGE_SUBSTITUTE); |
306 | range->subst_addr.s_addr = 0; | |
307 | range->subst_masklen = 0; | |
718e3744 | 308 | |
d62a17ae | 309 | return 1; |
718e3744 | 310 | } |
311 | ||
d62a17ae | 312 | int ospf_act_bb_connection(struct ospf *ospf) |
718e3744 | 313 | { |
d62a17ae | 314 | if (ospf->backbone == NULL) |
315 | return 0; | |
718e3744 | 316 | |
d62a17ae | 317 | return ospf->backbone->full_nbrs; |
718e3744 | 318 | } |
319 | ||
e2c6c153 | 320 | /* Determine whether this router is elected translator or not for area */ |
d62a17ae | 321 | static int ospf_abr_nssa_am_elected(struct ospf_area *area) |
e2c6c153 | 322 | { |
d62a17ae | 323 | struct route_node *rn; |
324 | struct ospf_lsa *lsa; | |
325 | struct router_lsa *rlsa; | |
326 | struct in_addr *best = NULL; | |
327 | ||
328 | LSDB_LOOP(ROUTER_LSDB(area), rn, lsa) | |
329 | { | |
330 | /* sanity checks */ | |
331 | if (!lsa || (lsa->data->type != OSPF_ROUTER_LSA) | |
332 | || IS_LSA_SELF(lsa)) | |
333 | continue; | |
334 | ||
335 | rlsa = (struct router_lsa *)lsa->data; | |
336 | ||
337 | /* ignore non-ABR routers */ | |
338 | if (!IS_ROUTER_LSA_BORDER(rlsa)) | |
339 | continue; | |
340 | ||
341 | /* Router has Nt flag - always translate */ | |
342 | if (IS_ROUTER_LSA_NT(rlsa)) { | |
343 | if (IS_DEBUG_OSPF_NSSA) | |
344 | zlog_debug( | |
345 | "ospf_abr_nssa_am_elected: " | |
346 | "router %s asserts Nt", | |
347 | inet_ntoa(lsa->data->id)); | |
348 | return 0; | |
349 | } | |
350 | ||
351 | if (best == NULL) | |
352 | best = &lsa->data->id; | |
353 | else if (IPV4_ADDR_CMP(&best->s_addr, &lsa->data->id.s_addr) | |
354 | < 0) | |
355 | best = &lsa->data->id; | |
356 | } | |
357 | ||
358 | if (IS_DEBUG_OSPF_NSSA) | |
359 | zlog_debug( | |
360 | "ospf_abr_nssa_am_elected: best electable ABR is: %s", | |
361 | (best) ? inet_ntoa(*best) : "<none>"); | |
362 | ||
363 | if (best == NULL) | |
364 | return 1; | |
365 | ||
366 | if (IPV4_ADDR_CMP(&best->s_addr, &area->ospf->router_id.s_addr) < 0) | |
367 | return 1; | |
368 | else | |
369 | return 0; | |
e2c6c153 | 370 | } |
371 | ||
372 | /* Check NSSA ABR status | |
373 | * assumes there are nssa areas | |
374 | */ | |
d62a17ae | 375 | static void ospf_abr_nssa_check_status(struct ospf *ospf) |
e2c6c153 | 376 | { |
d62a17ae | 377 | struct ospf_area *area; |
378 | struct listnode *lnode, *nnode; | |
379 | ||
380 | for (ALL_LIST_ELEMENTS(ospf->areas, lnode, nnode, area)) { | |
381 | u_char old_state = area->NSSATranslatorState; | |
382 | ||
383 | if (area->external_routing != OSPF_AREA_NSSA) | |
384 | continue; | |
385 | ||
386 | if (IS_DEBUG_OSPF(nssa, NSSA)) | |
387 | zlog_debug( | |
388 | "ospf_abr_nssa_check_status: " | |
389 | "checking area %s", | |
390 | inet_ntoa(area->area_id)); | |
391 | ||
392 | if (!IS_OSPF_ABR(area->ospf)) { | |
393 | if (IS_DEBUG_OSPF(nssa, NSSA)) | |
394 | zlog_debug( | |
395 | "ospf_abr_nssa_check_status: " | |
396 | "not ABR"); | |
397 | area->NSSATranslatorState = | |
398 | OSPF_NSSA_TRANSLATE_DISABLED; | |
399 | } else { | |
400 | switch (area->NSSATranslatorRole) { | |
401 | case OSPF_NSSA_ROLE_NEVER: | |
402 | /* We never Translate Type-7 LSA. */ | |
403 | /* TODO: check previous state and flush? */ | |
404 | if (IS_DEBUG_OSPF(nssa, NSSA)) | |
405 | zlog_debug( | |
406 | "ospf_abr_nssa_check_status: " | |
407 | "never translate"); | |
408 | area->NSSATranslatorState = | |
409 | OSPF_NSSA_TRANSLATE_DISABLED; | |
410 | break; | |
411 | ||
412 | case OSPF_NSSA_ROLE_ALWAYS: | |
413 | /* We always translate if we are an ABR | |
414 | * TODO: originate new LSAs if state change? | |
415 | * or let the nssa abr task take care of it? | |
416 | */ | |
417 | if (IS_DEBUG_OSPF(nssa, NSSA)) | |
418 | zlog_debug( | |
419 | "ospf_abr_nssa_check_status: " | |
420 | "translate always"); | |
421 | area->NSSATranslatorState = | |
422 | OSPF_NSSA_TRANSLATE_ENABLED; | |
423 | break; | |
424 | ||
425 | case OSPF_NSSA_ROLE_CANDIDATE: | |
426 | /* We are a candidate for Translation */ | |
427 | if (ospf_abr_nssa_am_elected(area) > 0) { | |
428 | area->NSSATranslatorState = | |
429 | OSPF_NSSA_TRANSLATE_ENABLED; | |
430 | if (IS_DEBUG_OSPF(nssa, NSSA)) | |
431 | zlog_debug( | |
432 | "ospf_abr_nssa_check_status: " | |
433 | "elected translator"); | |
434 | } else { | |
435 | area->NSSATranslatorState = | |
436 | OSPF_NSSA_TRANSLATE_DISABLED; | |
437 | if (IS_DEBUG_OSPF(nssa, NSSA)) | |
438 | zlog_debug( | |
439 | "ospf_abr_nssa_check_status: " | |
440 | "not elected"); | |
441 | } | |
442 | break; | |
443 | } | |
444 | } | |
445 | /* RFC3101, 3.1: | |
446 | * All NSSA border routers must set the E-bit in the Type-1 | |
447 | * router-LSAs | |
448 | * of their directly attached non-stub areas, even when they are | |
449 | * not | |
450 | * translating. | |
451 | */ | |
452 | if (old_state != area->NSSATranslatorState) { | |
453 | if (old_state == OSPF_NSSA_TRANSLATE_DISABLED) | |
454 | ospf_asbr_status_update(ospf, | |
455 | ++ospf->redistribute); | |
456 | else if (area->NSSATranslatorState | |
457 | == OSPF_NSSA_TRANSLATE_DISABLED) | |
458 | ospf_asbr_status_update(ospf, | |
459 | --ospf->redistribute); | |
460 | } | |
9560fa8a | 461 | } |
e2c6c153 | 462 | } |
e2c6c153 | 463 | |
718e3744 | 464 | /* Check area border router status. */ |
d62a17ae | 465 | void ospf_check_abr_status(struct ospf *ospf) |
718e3744 | 466 | { |
d62a17ae | 467 | struct ospf_area *area; |
468 | struct listnode *node, *nnode; | |
469 | int bb_configured = 0; | |
470 | int bb_act_attached = 0; | |
471 | int areas_configured = 0; | |
472 | int areas_act_attached = 0; | |
473 | u_char new_flags = ospf->flags; | |
474 | ||
475 | if (IS_DEBUG_OSPF_EVENT) | |
476 | zlog_debug("ospf_check_abr_status(): Start"); | |
477 | ||
478 | for (ALL_LIST_ELEMENTS(ospf->areas, node, nnode, area)) { | |
479 | if (listcount(area->oiflist)) { | |
480 | areas_configured++; | |
481 | ||
482 | if (OSPF_IS_AREA_BACKBONE(area)) | |
483 | bb_configured = 1; | |
484 | } | |
485 | ||
486 | if (ospf_area_actively_attached(area)) { | |
487 | areas_act_attached++; | |
488 | ||
489 | if (OSPF_IS_AREA_BACKBONE(area)) | |
490 | bb_act_attached = 1; | |
491 | } | |
718e3744 | 492 | } |
493 | ||
d62a17ae | 494 | if (IS_DEBUG_OSPF_EVENT) { |
495 | zlog_debug("ospf_check_abr_status(): looked through areas"); | |
496 | zlog_debug("ospf_check_abr_status(): bb_configured: %d", | |
497 | bb_configured); | |
498 | zlog_debug("ospf_check_abr_status(): bb_act_attached: %d", | |
499 | bb_act_attached); | |
500 | zlog_debug("ospf_check_abr_status(): areas_configured: %d", | |
501 | areas_configured); | |
502 | zlog_debug("ospf_check_abr_status(): areas_act_attached: %d", | |
503 | areas_act_attached); | |
504 | } | |
505 | ||
506 | switch (ospf->abr_type) { | |
507 | case OSPF_ABR_SHORTCUT: | |
508 | case OSPF_ABR_STAND: | |
509 | if (areas_act_attached > 1) | |
510 | SET_FLAG(new_flags, OSPF_FLAG_ABR); | |
511 | else | |
512 | UNSET_FLAG(new_flags, OSPF_FLAG_ABR); | |
513 | break; | |
514 | ||
515 | case OSPF_ABR_IBM: | |
516 | if ((areas_act_attached > 1) && bb_configured) | |
517 | SET_FLAG(new_flags, OSPF_FLAG_ABR); | |
518 | else | |
519 | UNSET_FLAG(new_flags, OSPF_FLAG_ABR); | |
520 | break; | |
521 | ||
522 | case OSPF_ABR_CISCO: | |
523 | if ((areas_configured > 1) && bb_act_attached) | |
524 | SET_FLAG(new_flags, OSPF_FLAG_ABR); | |
525 | else | |
526 | UNSET_FLAG(new_flags, OSPF_FLAG_ABR); | |
527 | break; | |
528 | default: | |
529 | break; | |
530 | } | |
531 | ||
532 | if (new_flags != ospf->flags) { | |
533 | ospf_spf_calculate_schedule(ospf, SPF_FLAG_ABR_STATUS_CHANGE); | |
534 | if (IS_DEBUG_OSPF_EVENT) | |
535 | zlog_debug( | |
536 | "ospf_check_abr_status(): new router flags: %x", | |
537 | new_flags); | |
538 | ospf->flags = new_flags; | |
539 | ospf_router_lsa_update(ospf); | |
718e3744 | 540 | } |
718e3744 | 541 | } |
542 | ||
d62a17ae | 543 | static void ospf_abr_update_aggregate(struct ospf_area_range *range, |
544 | struct ospf_route * or, | |
545 | struct ospf_area *area) | |
718e3744 | 546 | { |
d62a17ae | 547 | if (IS_DEBUG_OSPF_EVENT) |
548 | zlog_debug("ospf_abr_update_aggregate(): Start"); | |
b4154c14 | 549 | |
d62a17ae | 550 | if (CHECK_FLAG(area->stub_router_state, OSPF_AREA_IS_STUB_ROUTED) |
551 | && (range->cost != OSPF_STUB_MAX_METRIC_SUMMARY_COST)) { | |
552 | range->cost = OSPF_STUB_MAX_METRIC_SUMMARY_COST; | |
553 | if (IS_DEBUG_OSPF_EVENT) | |
554 | zlog_debug( | |
555 | "ospf_abr_update_aggregate(): use summary max-metric 0x%08x", | |
556 | range->cost); | |
557 | } else if (range->cost_config != OSPF_AREA_RANGE_COST_UNSPEC) { | |
558 | if (IS_DEBUG_OSPF_EVENT) | |
559 | zlog_debug( | |
560 | "ospf_abr_update_aggregate(): use configured cost %d", | |
561 | range->cost_config); | |
718e3744 | 562 | |
d62a17ae | 563 | range->cost = range->cost_config; |
564 | } else { | |
565 | if (range->specifics == 0) { | |
566 | if (IS_DEBUG_OSPF_EVENT) | |
567 | zlog_debug( | |
568 | "ospf_abr_update_aggregate(): use or->cost %d", | |
569 | or->cost); | |
570 | ||
571 | range->cost = or->cost; /* 1st time get 1st cost */ | |
572 | } | |
718e3744 | 573 | |
d62a17ae | 574 | if (or->cost > range->cost) { |
575 | if (IS_DEBUG_OSPF_EVENT) | |
576 | zlog_debug( | |
577 | "ospf_abr_update_aggregate(): update to %d", | |
578 | or->cost); | |
718e3744 | 579 | |
d62a17ae | 580 | range->cost = or->cost; |
581 | } | |
582 | } | |
583 | ||
584 | range->specifics++; | |
718e3744 | 585 | } |
586 | ||
d62a17ae | 587 | static void set_metric(struct ospf_lsa *lsa, u_int32_t metric) |
718e3744 | 588 | { |
d62a17ae | 589 | struct summary_lsa *header; |
590 | u_char *mp; | |
591 | metric = htonl(metric); | |
592 | mp = (u_char *)&metric; | |
593 | mp++; | |
594 | header = (struct summary_lsa *)lsa->data; | |
595 | memcpy(header->metric, mp, 3); | |
718e3744 | 596 | } |
597 | ||
718e3744 | 598 | /* ospf_abr_translate_nssa */ |
d62a17ae | 599 | static int ospf_abr_translate_nssa(struct ospf_area *area, struct ospf_lsa *lsa) |
718e3744 | 600 | { |
d62a17ae | 601 | /* Incoming Type-7 or later aggregated Type-7 |
602 | * | |
603 | * LSA is skipped if P-bit is off. | |
604 | * LSA is aggregated if within range. | |
605 | * | |
606 | * The Type-7 is translated, Installed/Approved as a Type-5 into | |
607 | * global LSDB, then Flooded through AS | |
608 | * | |
609 | * Later, any Unapproved Translated Type-5's are flushed/discarded | |
610 | */ | |
611 | ||
612 | struct ospf_lsa *old = NULL, *new = NULL; | |
613 | struct as_external_lsa *ext7; | |
614 | struct prefix_ipv4 p; | |
615 | ||
616 | if (!CHECK_FLAG(lsa->data->options, OSPF_OPTION_NP)) { | |
617 | if (IS_DEBUG_OSPF_NSSA) | |
618 | zlog_debug( | |
619 | "ospf_abr_translate_nssa(): LSA Id %s, P-bit off, NO Translation", | |
620 | inet_ntoa(lsa->data->id)); | |
621 | return 1; | |
622 | } | |
623 | ||
624 | if (IS_DEBUG_OSPF_NSSA) | |
625 | zlog_debug( | |
626 | "ospf_abr_translate_nssa(): LSA Id %s, TRANSLATING 7 to 5", | |
627 | inet_ntoa(lsa->data->id)); | |
628 | ||
629 | ext7 = (struct as_external_lsa *)(lsa->data); | |
630 | p.prefix = lsa->data->id; | |
631 | p.prefixlen = ip_masklen(ext7->mask); | |
632 | ||
633 | if (ext7->e[0].fwd_addr.s_addr == OSPF_DEFAULT_DESTINATION) { | |
634 | if (IS_DEBUG_OSPF_NSSA) | |
635 | zlog_debug( | |
636 | "ospf_abr_translate_nssa(): LSA Id %s, " | |
637 | "Forward address is 0, NO Translation", | |
638 | inet_ntoa(lsa->data->id)); | |
639 | return 1; | |
640 | } | |
641 | ||
642 | /* try find existing AS-External LSA for this prefix */ | |
643 | ||
644 | old = ospf_external_info_find_lsa(area->ospf, &p); | |
645 | ||
646 | if (old) { | |
647 | if (IS_DEBUG_OSPF_NSSA) | |
648 | zlog_debug( | |
649 | "ospf_abr_translate_nssa(): " | |
650 | "found old translated LSA Id %s, refreshing", | |
651 | inet_ntoa(old->data->id)); | |
652 | ||
653 | /* refresh */ | |
654 | new = ospf_translated_nssa_refresh(area->ospf, lsa, old); | |
655 | if (!new) { | |
656 | if (IS_DEBUG_OSPF_NSSA) | |
657 | zlog_debug( | |
658 | "ospf_abr_translate_nssa(): " | |
659 | "could not refresh translated LSA Id %s", | |
660 | inet_ntoa(old->data->id)); | |
661 | } | |
662 | } else { | |
663 | /* no existing external route for this LSA Id | |
664 | * originate translated LSA | |
665 | */ | |
666 | ||
667 | if ((new = ospf_translated_nssa_originate(area->ospf, lsa)) | |
668 | == NULL) { | |
669 | if (IS_DEBUG_OSPF_NSSA) | |
670 | zlog_debug( | |
671 | "ospf_abr_translate_nssa(): Could not translate " | |
672 | "Type-7 for %s to Type-5", | |
673 | inet_ntoa(lsa->data->id)); | |
674 | return 1; | |
675 | } | |
676 | } | |
677 | ||
678 | /* Area where Aggregate testing will be inserted, just like summary | |
679 | advertisements */ | |
680 | /* ospf_abr_check_nssa_range (p_arg, lsa-> cost, lsa -> area); */ | |
681 | ||
682 | return 0; | |
718e3744 | 683 | } |
684 | ||
d62a17ae | 685 | static void ospf_abr_translate_nssa_range(struct prefix_ipv4 *p, u_int32_t cost) |
718e3744 | 686 | { |
d62a17ae | 687 | /* The Type-7 is created from the aggregated prefix and forwarded |
688 | for lsa installation and flooding... to be added... */ | |
718e3744 | 689 | } |
718e3744 | 690 | |
d62a17ae | 691 | void ospf_abr_announce_network_to_area(struct prefix_ipv4 *p, u_int32_t cost, |
692 | struct ospf_area *area) | |
718e3744 | 693 | { |
d62a17ae | 694 | struct ospf_lsa *lsa, *old = NULL; |
695 | struct summary_lsa *sl = NULL; | |
696 | u_int32_t full_cost; | |
697 | ||
698 | if (IS_DEBUG_OSPF_EVENT) | |
699 | zlog_debug("ospf_abr_announce_network_to_area(): Start"); | |
700 | ||
701 | if (CHECK_FLAG(area->stub_router_state, OSPF_AREA_IS_STUB_ROUTED)) | |
702 | full_cost = OSPF_STUB_MAX_METRIC_SUMMARY_COST; | |
703 | else | |
704 | full_cost = cost; | |
705 | ||
706 | old = ospf_lsa_lookup_by_prefix(area->lsdb, OSPF_SUMMARY_LSA, | |
707 | (struct prefix_ipv4 *)p, | |
708 | area->ospf->router_id); | |
709 | if (old) { | |
710 | if (IS_DEBUG_OSPF_EVENT) | |
711 | zlog_debug( | |
712 | "ospf_abr_announce_network_to_area(): old summary found"); | |
713 | ||
714 | sl = (struct summary_lsa *)old->data; | |
715 | ||
716 | if (IS_DEBUG_OSPF_EVENT) | |
717 | zlog_debug( | |
718 | "ospf_abr_announce_network_to_area(): " | |
719 | "old metric: %d, new metric: %d", | |
720 | GET_METRIC(sl->metric), cost); | |
721 | ||
722 | if ((GET_METRIC(sl->metric) == full_cost) | |
723 | && ((old->flags & OSPF_LSA_IN_MAXAGE) == 0)) { | |
724 | /* unchanged. simply reapprove it */ | |
725 | if (IS_DEBUG_OSPF_EVENT) | |
726 | zlog_debug( | |
727 | "ospf_abr_announce_network_to_area(): " | |
728 | "old summary approved"); | |
729 | SET_FLAG(old->flags, OSPF_LSA_APPROVED); | |
730 | } else { | |
731 | /* LSA is changed, refresh it */ | |
732 | if (IS_DEBUG_OSPF_EVENT) | |
733 | zlog_debug( | |
734 | "ospf_abr_announce_network_to_area(): " | |
735 | "refreshing summary"); | |
736 | set_metric(old, full_cost); | |
737 | lsa = ospf_lsa_refresh(area->ospf, old); | |
738 | ||
739 | if (!lsa) { | |
740 | char buf[PREFIX2STR_BUFFER]; | |
741 | ||
742 | prefix2str((struct prefix *)p, buf, | |
743 | sizeof(buf)); | |
744 | zlog_warn("%s: Could not refresh %s to %s", | |
745 | __func__, buf, | |
746 | inet_ntoa(area->area_id)); | |
747 | return; | |
748 | } | |
749 | ||
750 | SET_FLAG(lsa->flags, OSPF_LSA_APPROVED); | |
751 | /* This will flood through area. */ | |
752 | } | |
753 | } else { | |
754 | if (IS_DEBUG_OSPF_EVENT) | |
755 | zlog_debug( | |
756 | "ospf_abr_announce_network_to_area(): " | |
757 | "creating new summary"); | |
758 | lsa = ospf_summary_lsa_originate((struct prefix_ipv4 *)p, | |
759 | full_cost, area); | |
760 | /* This will flood through area. */ | |
761 | ||
762 | if (!lsa) { | |
763 | char buf[PREFIX2STR_BUFFER]; | |
764 | ||
765 | prefix2str((struct prefix *)p, buf, sizeof(buf)); | |
766 | zlog_warn("%s: Could not originate %s to %s", __func__, | |
767 | buf, inet_ntoa(area->area_id)); | |
768 | return; | |
769 | } | |
770 | ||
771 | SET_FLAG(lsa->flags, OSPF_LSA_APPROVED); | |
772 | if (IS_DEBUG_OSPF_EVENT) | |
773 | zlog_debug( | |
774 | "ospf_abr_announce_network_to_area(): " | |
775 | "flooding new version of summary"); | |
c24d602e | 776 | } |
d62a17ae | 777 | |
778 | if (IS_DEBUG_OSPF_EVENT) | |
779 | zlog_debug("ospf_abr_announce_network_to_area(): Stop"); | |
718e3744 | 780 | } |
781 | ||
d62a17ae | 782 | static int ospf_abr_nexthops_belong_to_area(struct ospf_route * or, |
783 | struct ospf_area *area) | |
718e3744 | 784 | { |
d62a17ae | 785 | struct listnode *node, *nnode; |
786 | struct ospf_path *path; | |
787 | struct ospf_interface *oi; | |
718e3744 | 788 | |
d62a17ae | 789 | for (ALL_LIST_ELEMENTS_RO(or->paths, node, path)) |
790 | for (ALL_LIST_ELEMENTS_RO(area->oiflist, nnode, oi)) | |
791 | if (oi->ifp && oi->ifp->ifindex == path->ifindex) | |
792 | return 1; | |
718e3744 | 793 | |
d62a17ae | 794 | return 0; |
718e3744 | 795 | } |
796 | ||
d62a17ae | 797 | static int ospf_abr_should_accept(struct prefix_ipv4 *p, struct ospf_area *area) |
718e3744 | 798 | { |
d62a17ae | 799 | if (IMPORT_NAME(area)) { |
800 | if (IMPORT_LIST(area) == NULL) | |
801 | IMPORT_LIST(area) = | |
802 | access_list_lookup(AFI_IP, IMPORT_NAME(area)); | |
803 | ||
804 | if (IMPORT_LIST(area)) | |
805 | if (access_list_apply(IMPORT_LIST(area), p) | |
806 | == FILTER_DENY) | |
807 | return 0; | |
808 | } | |
718e3744 | 809 | |
d62a17ae | 810 | return 1; |
718e3744 | 811 | } |
812 | ||
d62a17ae | 813 | static int ospf_abr_plist_in_check(struct ospf_area *area, |
814 | struct ospf_route * or, | |
815 | struct prefix_ipv4 *p) | |
718e3744 | 816 | { |
d62a17ae | 817 | if (PREFIX_NAME_IN(area)) { |
818 | if (PREFIX_LIST_IN(area) == NULL) | |
819 | PREFIX_LIST_IN(area) = prefix_list_lookup( | |
820 | AFI_IP, PREFIX_NAME_IN(area)); | |
821 | if (PREFIX_LIST_IN(area)) | |
822 | if (prefix_list_apply(PREFIX_LIST_IN(area), p) | |
823 | != PREFIX_PERMIT) | |
824 | return 0; | |
825 | } | |
826 | return 1; | |
718e3744 | 827 | } |
828 | ||
d62a17ae | 829 | static int ospf_abr_plist_out_check(struct ospf_area *area, |
830 | struct ospf_route * or, | |
831 | struct prefix_ipv4 *p) | |
718e3744 | 832 | { |
d62a17ae | 833 | if (PREFIX_NAME_OUT(area)) { |
834 | if (PREFIX_LIST_OUT(area) == NULL) | |
835 | PREFIX_LIST_OUT(area) = prefix_list_lookup( | |
836 | AFI_IP, PREFIX_NAME_OUT(area)); | |
837 | if (PREFIX_LIST_OUT(area)) | |
838 | if (prefix_list_apply(PREFIX_LIST_OUT(area), p) | |
839 | != PREFIX_PERMIT) | |
840 | return 0; | |
841 | } | |
842 | return 1; | |
718e3744 | 843 | } |
844 | ||
d62a17ae | 845 | static void ospf_abr_announce_network(struct ospf *ospf, struct prefix_ipv4 *p, |
846 | struct ospf_route * or) | |
718e3744 | 847 | { |
d62a17ae | 848 | struct ospf_area_range *range; |
849 | struct ospf_area *area, *or_area; | |
850 | struct listnode *node; | |
718e3744 | 851 | |
d62a17ae | 852 | if (IS_DEBUG_OSPF_EVENT) |
853 | zlog_debug("ospf_abr_announce_network(): Start"); | |
718e3744 | 854 | |
d62a17ae | 855 | or_area = ospf_area_lookup_by_area_id(ospf, or->u.std.area_id); |
856 | assert(or_area); | |
718e3744 | 857 | |
d62a17ae | 858 | for (ALL_LIST_ELEMENTS_RO(ospf->areas, node, area)) { |
859 | if (IS_DEBUG_OSPF_EVENT) | |
860 | zlog_debug( | |
861 | "ospf_abr_announce_network(): looking at area %s", | |
862 | inet_ntoa(area->area_id)); | |
718e3744 | 863 | |
d62a17ae | 864 | if (IPV4_ADDR_SAME(& or->u.std.area_id, &area->area_id)) |
865 | continue; | |
718e3744 | 866 | |
d62a17ae | 867 | if (ospf_abr_nexthops_belong_to_area(or, area)) |
868 | continue; | |
718e3744 | 869 | |
d62a17ae | 870 | if (!ospf_abr_should_accept(p, area)) { |
871 | if (IS_DEBUG_OSPF_EVENT) | |
872 | zlog_debug( | |
873 | "ospf_abr_announce_network(): " | |
874 | "prefix %s/%d was denied by import-list", | |
875 | inet_ntoa(p->prefix), p->prefixlen); | |
876 | continue; | |
877 | } | |
878 | ||
879 | if (!ospf_abr_plist_in_check(area, or, p)) { | |
880 | if (IS_DEBUG_OSPF_EVENT) | |
881 | zlog_debug( | |
882 | "ospf_abr_announce_network(): " | |
883 | "prefix %s/%d was denied by prefix-list", | |
884 | inet_ntoa(p->prefix), p->prefixlen); | |
885 | continue; | |
886 | } | |
887 | ||
888 | if (area->external_routing != OSPF_AREA_DEFAULT | |
889 | && area->no_summary) { | |
890 | if (IS_DEBUG_OSPF_EVENT) | |
891 | zlog_debug( | |
892 | "ospf_abr_announce_network(): " | |
893 | "area %s is stub and no_summary", | |
894 | inet_ntoa(area->area_id)); | |
895 | continue; | |
896 | } | |
897 | ||
898 | if (or->path_type == OSPF_PATH_INTER_AREA) { | |
899 | if (IS_DEBUG_OSPF_EVENT) | |
900 | zlog_debug( | |
901 | "ospf_abr_announce_network(): this is " | |
902 | "inter-area route to %s/%d", | |
903 | inet_ntoa(p->prefix), p->prefixlen); | |
718e3744 | 904 | |
d62a17ae | 905 | if (!OSPF_IS_AREA_BACKBONE(area)) |
906 | ospf_abr_announce_network_to_area(p, or->cost, | |
907 | area); | |
908 | } | |
909 | ||
910 | if (or->path_type == OSPF_PATH_INTRA_AREA) { | |
911 | if (IS_DEBUG_OSPF_EVENT) | |
912 | zlog_debug( | |
913 | "ospf_abr_announce_network(): " | |
914 | "this is intra-area route to %s/%d", | |
915 | inet_ntoa(p->prefix), p->prefixlen); | |
916 | if ((range = ospf_area_range_match(or_area, p)) | |
917 | && !ospf_area_is_transit(area)) | |
918 | ospf_abr_update_aggregate(range, or, area); | |
919 | else | |
920 | ospf_abr_announce_network_to_area(p, or->cost, | |
921 | area); | |
922 | } | |
718e3744 | 923 | } |
d62a17ae | 924 | } |
718e3744 | 925 | |
d62a17ae | 926 | static int ospf_abr_should_announce(struct ospf *ospf, struct prefix_ipv4 *p, |
927 | struct ospf_route * or) | |
928 | { | |
929 | struct ospf_area *area; | |
930 | ||
931 | area = ospf_area_lookup_by_area_id(ospf, or->u.std.area_id); | |
932 | ||
933 | assert(area); | |
934 | ||
935 | if (EXPORT_NAME(area)) { | |
936 | if (EXPORT_LIST(area) == NULL) | |
937 | EXPORT_LIST(area) = | |
938 | access_list_lookup(AFI_IP, EXPORT_NAME(area)); | |
939 | ||
940 | if (EXPORT_LIST(area)) | |
941 | if (access_list_apply(EXPORT_LIST(area), p) | |
942 | == FILTER_DENY) | |
943 | return 0; | |
718e3744 | 944 | } |
945 | ||
d62a17ae | 946 | return 1; |
947 | } | |
718e3744 | 948 | |
d62a17ae | 949 | static void ospf_abr_process_nssa_translates(struct ospf *ospf) |
950 | { | |
951 | /* Scan through all NSSA_LSDB records for all areas; | |
952 | ||
953 | If P-bit is on, translate all Type-7's to 5's and aggregate or | |
954 | flood install as approved in Type-5 LSDB with XLATE Flag on | |
955 | later, do same for all aggregates... At end, DISCARD all | |
956 | remaining UNAPPROVED Type-5's (Aggregate is for future ) */ | |
957 | struct listnode *node; | |
958 | struct ospf_area *area; | |
959 | struct route_node *rn; | |
960 | struct ospf_lsa *lsa; | |
961 | ||
962 | if (IS_DEBUG_OSPF_NSSA) | |
963 | zlog_debug("ospf_abr_process_nssa_translates(): Start"); | |
964 | ||
965 | for (ALL_LIST_ELEMENTS_RO(ospf->areas, node, area)) { | |
966 | if (!area->NSSATranslatorState) | |
967 | continue; /* skip if not translator */ | |
968 | ||
969 | if (area->external_routing != OSPF_AREA_NSSA) | |
970 | continue; /* skip if not Nssa Area */ | |
971 | ||
972 | if (IS_DEBUG_OSPF_NSSA) | |
973 | zlog_debug( | |
974 | "ospf_abr_process_nssa_translates(): " | |
975 | "looking at area %s", | |
976 | inet_ntoa(area->area_id)); | |
977 | ||
978 | LSDB_LOOP(NSSA_LSDB(area), rn, lsa) | |
979 | ospf_abr_translate_nssa(area, lsa); | |
718e3744 | 980 | } |
981 | ||
d62a17ae | 982 | if (IS_DEBUG_OSPF_NSSA) |
983 | zlog_debug("ospf_abr_process_nssa_translates(): Stop"); | |
718e3744 | 984 | } |
985 | ||
d62a17ae | 986 | static void ospf_abr_process_network_rt(struct ospf *ospf, |
987 | struct route_table *rt) | |
718e3744 | 988 | { |
d62a17ae | 989 | struct ospf_area *area; |
990 | struct ospf_route * or ; | |
991 | struct route_node *rn; | |
147193a2 | 992 | |
d62a17ae | 993 | if (IS_DEBUG_OSPF_EVENT) |
994 | zlog_debug("ospf_abr_process_network_rt(): Start"); | |
718e3744 | 995 | |
d62a17ae | 996 | for (rn = route_top(rt); rn; rn = route_next(rn)) { |
997 | if ((or = rn->info) == NULL) | |
998 | continue; | |
718e3744 | 999 | |
d62a17ae | 1000 | if (!(area = ospf_area_lookup_by_area_id(ospf, |
1001 | or->u.std.area_id))) { | |
1002 | if (IS_DEBUG_OSPF_EVENT) | |
1003 | zlog_debug( | |
1004 | "ospf_abr_process_network_rt(): area %s no longer exists", | |
1005 | inet_ntoa(or->u.std.area_id)); | |
1006 | continue; | |
1007 | } | |
718e3744 | 1008 | |
d62a17ae | 1009 | if (IS_DEBUG_OSPF_EVENT) |
1010 | zlog_debug( | |
1011 | "ospf_abr_process_network_rt(): this is a route to %s/%d", | |
1012 | inet_ntoa(rn->p.u.prefix4), rn->p.prefixlen); | |
1013 | if (or->path_type >= OSPF_PATH_TYPE1_EXTERNAL) { | |
1014 | if (IS_DEBUG_OSPF_EVENT) | |
1015 | zlog_debug( | |
1016 | "ospf_abr_process_network_rt(): " | |
1017 | "this is an External router, skipping"); | |
1018 | continue; | |
1019 | } | |
718e3744 | 1020 | |
d62a17ae | 1021 | if (or->cost >= OSPF_LS_INFINITY) { |
1022 | if (IS_DEBUG_OSPF_EVENT) | |
1023 | zlog_debug( | |
1024 | "ospf_abr_process_network_rt():" | |
1025 | " this route's cost is infinity, skipping"); | |
1026 | continue; | |
1027 | } | |
718e3744 | 1028 | |
d62a17ae | 1029 | if (or->type == OSPF_DESTINATION_DISCARD) { |
1030 | if (IS_DEBUG_OSPF_EVENT) | |
1031 | zlog_debug( | |
1032 | "ospf_abr_process_network_rt():" | |
1033 | " this is a discard entry, skipping"); | |
1034 | continue; | |
1035 | } | |
1036 | ||
9d303b37 DL |
1037 | if ( |
1038 | or->path_type == OSPF_PATH_INTRA_AREA | |
1039 | && !ospf_abr_should_announce( | |
1040 | ospf, (struct prefix_ipv4 *)&rn->p, | |
1041 | or)) { | |
d62a17ae | 1042 | if (IS_DEBUG_OSPF_EVENT) |
1043 | zlog_debug( | |
1044 | "ospf_abr_process_network_rt(): denied by export-list"); | |
1045 | continue; | |
1046 | } | |
1047 | ||
9d303b37 DL |
1048 | if ( |
1049 | or->path_type == OSPF_PATH_INTRA_AREA | |
1050 | && !ospf_abr_plist_out_check( | |
1051 | area, or, | |
1052 | (struct prefix_ipv4 *)&rn->p)) { | |
d62a17ae | 1053 | if (IS_DEBUG_OSPF_EVENT) |
1054 | zlog_debug( | |
1055 | "ospf_abr_process_network_rt(): denied by prefix-list"); | |
1056 | continue; | |
1057 | } | |
718e3744 | 1058 | |
d62a17ae | 1059 | if ((or->path_type == OSPF_PATH_INTER_AREA) |
1060 | && !OSPF_IS_AREA_ID_BACKBONE(or->u.std.area_id)) { | |
1061 | if (IS_DEBUG_OSPF_EVENT) | |
1062 | zlog_debug( | |
1063 | "ospf_abr_process_network_rt():" | |
1064 | " this is route is not backbone one, skipping"); | |
1065 | continue; | |
1066 | } | |
718e3744 | 1067 | |
718e3744 | 1068 | |
d62a17ae | 1069 | if ((ospf->abr_type == OSPF_ABR_CISCO) |
1070 | || (ospf->abr_type == OSPF_ABR_IBM)) | |
718e3744 | 1071 | |
d62a17ae | 1072 | if (!ospf_act_bb_connection(ospf) && |
1073 | or->path_type != OSPF_PATH_INTRA_AREA) { | |
1074 | if (IS_DEBUG_OSPF_EVENT) | |
1075 | zlog_debug( | |
1076 | "ospf_abr_process_network_rt(): ALT ABR: " | |
1077 | "No BB connection, skip not intra-area routes"); | |
1078 | continue; | |
1079 | } | |
718e3744 | 1080 | |
d62a17ae | 1081 | if (IS_DEBUG_OSPF_EVENT) |
1082 | zlog_debug("ospf_abr_process_network_rt(): announcing"); | |
1083 | ospf_abr_announce_network(ospf, (struct prefix_ipv4 *)&rn->p, | |
1084 | or); | |
718e3744 | 1085 | } |
1086 | ||
d62a17ae | 1087 | if (IS_DEBUG_OSPF_EVENT) |
1088 | zlog_debug("ospf_abr_process_network_rt(): Stop"); | |
1089 | } | |
718e3744 | 1090 | |
d62a17ae | 1091 | static void ospf_abr_announce_rtr_to_area(struct prefix_ipv4 *p, u_int32_t cost, |
1092 | struct ospf_area *area) | |
1093 | { | |
1094 | struct ospf_lsa *lsa, *old = NULL; | |
1095 | struct summary_lsa *slsa = NULL; | |
718e3744 | 1096 | |
d62a17ae | 1097 | if (IS_DEBUG_OSPF_EVENT) |
1098 | zlog_debug("ospf_abr_announce_rtr_to_area(): Start"); | |
718e3744 | 1099 | |
d62a17ae | 1100 | old = ospf_lsa_lookup_by_prefix(area->lsdb, OSPF_ASBR_SUMMARY_LSA, p, |
1101 | area->ospf->router_id); | |
1102 | if (old) { | |
1103 | if (IS_DEBUG_OSPF_EVENT) | |
1104 | zlog_debug( | |
1105 | "ospf_abr_announce_rtr_to_area(): old summary found"); | |
1106 | slsa = (struct summary_lsa *)old->data; | |
718e3744 | 1107 | |
d62a17ae | 1108 | if (IS_DEBUG_OSPF_EVENT) |
1109 | zlog_debug( | |
1110 | "ospf_abr_announce_network_to_area(): " | |
1111 | "old metric: %d, new metric: %d", | |
1112 | GET_METRIC(slsa->metric), cost); | |
718e3744 | 1113 | } |
1114 | ||
d62a17ae | 1115 | if (old && (GET_METRIC(slsa->metric) == cost) |
1116 | && ((old->flags & OSPF_LSA_IN_MAXAGE) == 0)) { | |
1117 | if (IS_DEBUG_OSPF_EVENT) | |
1118 | zlog_debug( | |
1119 | "ospf_abr_announce_rtr_to_area(): old summary approved"); | |
1120 | SET_FLAG(old->flags, OSPF_LSA_APPROVED); | |
1121 | } else { | |
1122 | if (IS_DEBUG_OSPF_EVENT) | |
1123 | zlog_debug("ospf_abr_announce_rtr_to_area(): 2.2"); | |
1124 | ||
1125 | if (old) { | |
1126 | set_metric(old, cost); | |
1127 | lsa = ospf_lsa_refresh(area->ospf, old); | |
1128 | } else | |
1129 | lsa = ospf_summary_asbr_lsa_originate(p, cost, area); | |
1130 | if (!lsa) { | |
1131 | char buf[PREFIX2STR_BUFFER]; | |
1132 | ||
1133 | prefix2str((struct prefix *)p, buf, sizeof(buf)); | |
1134 | zlog_warn("%s: Could not refresh/originate %s to %s", | |
1135 | __func__, buf, inet_ntoa(area->area_id)); | |
1136 | return; | |
1137 | } | |
718e3744 | 1138 | |
d62a17ae | 1139 | if (IS_DEBUG_OSPF_EVENT) |
1140 | zlog_debug( | |
1141 | "ospf_abr_announce_rtr_to_area(): " | |
1142 | "flooding new version of summary"); | |
718e3744 | 1143 | |
d62a17ae | 1144 | /* |
1145 | zlog_info ("ospf_abr_announce_rtr_to_area(): creating new | |
1146 | summary"); | |
1147 | lsa = ospf_summary_asbr_lsa (p, cost, area, old); */ | |
718e3744 | 1148 | |
d62a17ae | 1149 | SET_FLAG(lsa->flags, OSPF_LSA_APPROVED); |
1150 | /* ospf_flood_through_area (area, NULL, lsa);*/ | |
1151 | } | |
718e3744 | 1152 | |
d62a17ae | 1153 | if (IS_DEBUG_OSPF_EVENT) |
1154 | zlog_debug("ospf_abr_announce_rtr_to_area(): Stop"); | |
718e3744 | 1155 | } |
1156 | ||
d62a17ae | 1157 | |
1158 | static void ospf_abr_announce_rtr(struct ospf *ospf, struct prefix_ipv4 *p, | |
1159 | struct ospf_route * or) | |
718e3744 | 1160 | { |
d62a17ae | 1161 | struct listnode *node; |
1162 | struct ospf_area *area; | |
1163 | ||
1164 | if (IS_DEBUG_OSPF_EVENT) | |
1165 | zlog_debug("ospf_abr_announce_rtr(): Start"); | |
1166 | ||
1167 | for (ALL_LIST_ELEMENTS_RO(ospf->areas, node, area)) { | |
1168 | if (IS_DEBUG_OSPF_EVENT) | |
1169 | zlog_debug( | |
1170 | "ospf_abr_announce_rtr(): looking at area %s", | |
1171 | inet_ntoa(area->area_id)); | |
1172 | ||
1173 | if (IPV4_ADDR_SAME(& or->u.std.area_id, &area->area_id)) | |
1174 | continue; | |
1175 | ||
1176 | if (ospf_abr_nexthops_belong_to_area(or, area)) | |
1177 | continue; | |
1178 | ||
1179 | if (area->external_routing != OSPF_AREA_DEFAULT) { | |
1180 | if (IS_DEBUG_OSPF_EVENT) | |
1181 | zlog_debug( | |
1182 | "ospf_abr_announce_rtr(): " | |
1183 | "area %s doesn't support external routing", | |
1184 | inet_ntoa(area->area_id)); | |
1185 | continue; | |
1186 | } | |
1187 | ||
1188 | if (or->path_type == OSPF_PATH_INTER_AREA) { | |
1189 | if (IS_DEBUG_OSPF_EVENT) | |
1190 | zlog_debug( | |
1191 | "ospf_abr_announce_rtr(): " | |
1192 | "this is inter-area route to %s", | |
1193 | inet_ntoa(p->prefix)); | |
1194 | if (!OSPF_IS_AREA_BACKBONE(area)) | |
1195 | ospf_abr_announce_rtr_to_area(p, or->cost, | |
1196 | area); | |
1197 | } | |
1198 | ||
1199 | if (or->path_type == OSPF_PATH_INTRA_AREA) { | |
1200 | if (IS_DEBUG_OSPF_EVENT) | |
1201 | zlog_debug( | |
1202 | "ospf_abr_announce_rtr(): " | |
1203 | "this is intra-area route to %s", | |
1204 | inet_ntoa(p->prefix)); | |
1205 | ospf_abr_announce_rtr_to_area(p, or->cost, area); | |
1206 | } | |
718e3744 | 1207 | } |
718e3744 | 1208 | |
d62a17ae | 1209 | if (IS_DEBUG_OSPF_EVENT) |
1210 | zlog_debug("ospf_abr_announce_rtr(): Stop"); | |
1211 | } | |
718e3744 | 1212 | |
d62a17ae | 1213 | static void ospf_abr_process_router_rt(struct ospf *ospf, |
1214 | struct route_table *rt) | |
718e3744 | 1215 | { |
d62a17ae | 1216 | struct ospf_route * or ; |
1217 | struct route_node *rn; | |
1218 | struct list *l; | |
718e3744 | 1219 | |
d62a17ae | 1220 | if (IS_DEBUG_OSPF_EVENT) |
1221 | zlog_debug("ospf_abr_process_router_rt(): Start"); | |
718e3744 | 1222 | |
d62a17ae | 1223 | for (rn = route_top(rt); rn; rn = route_next(rn)) { |
1224 | struct listnode *node, *nnode; | |
1225 | char flag = 0; | |
1226 | struct ospf_route *best = NULL; | |
718e3744 | 1227 | |
d62a17ae | 1228 | if (rn->info == NULL) |
1229 | continue; | |
718e3744 | 1230 | |
d62a17ae | 1231 | l = rn->info; |
718e3744 | 1232 | |
d62a17ae | 1233 | if (IS_DEBUG_OSPF_EVENT) |
1234 | zlog_debug( | |
1235 | "ospf_abr_process_router_rt(): this is a route to %s", | |
1236 | inet_ntoa(rn->p.u.prefix4)); | |
1237 | ||
1238 | for (ALL_LIST_ELEMENTS(l, node, nnode, or)) { | |
1239 | if (!ospf_area_lookup_by_area_id(ospf, | |
1240 | or->u.std.area_id)) { | |
1241 | if (IS_DEBUG_OSPF_EVENT) | |
1242 | zlog_debug( | |
1243 | "ospf_abr_process_router_rt(): area %s no longer exists", | |
1244 | inet_ntoa(or->u.std.area_id)); | |
1245 | continue; | |
1246 | } | |
1247 | ||
1248 | ||
1249 | if (!CHECK_FLAG(or->u.std.flags, ROUTER_LSA_EXTERNAL)) { | |
1250 | if (IS_DEBUG_OSPF_EVENT) | |
1251 | zlog_debug( | |
1252 | "ospf_abr_process_router_rt(): " | |
1253 | "This is not an ASBR, skipping"); | |
1254 | continue; | |
1255 | } | |
1256 | ||
1257 | if (!flag) { | |
1258 | best = ospf_find_asbr_route( | |
1259 | ospf, rt, (struct prefix_ipv4 *)&rn->p); | |
1260 | flag = 1; | |
1261 | } | |
1262 | ||
1263 | if (best == NULL) | |
1264 | continue; | |
1265 | ||
1266 | if (or != best) { | |
1267 | if (IS_DEBUG_OSPF_EVENT) | |
1268 | zlog_debug( | |
1269 | "ospf_abr_process_router_rt(): " | |
1270 | "This route is not the best among possible, skipping"); | |
1271 | continue; | |
1272 | } | |
1273 | ||
9d303b37 DL |
1274 | if ( |
1275 | or->path_type == OSPF_PATH_INTER_AREA | |
1276 | && !OSPF_IS_AREA_ID_BACKBONE( | |
1277 | or->u.std.area_id)) { | |
d62a17ae | 1278 | if (IS_DEBUG_OSPF_EVENT) |
1279 | zlog_debug( | |
1280 | "ospf_abr_process_router_rt(): " | |
1281 | "This route is not a backbone one, skipping"); | |
1282 | continue; | |
1283 | } | |
1284 | ||
1285 | if (or->cost >= OSPF_LS_INFINITY) { | |
1286 | if (IS_DEBUG_OSPF_EVENT) | |
1287 | zlog_debug( | |
1288 | "ospf_abr_process_router_rt(): " | |
1289 | "This route has LS_INFINITY metric, skipping"); | |
1290 | continue; | |
1291 | } | |
1292 | ||
1293 | if (ospf->abr_type == OSPF_ABR_CISCO | |
1294 | || ospf->abr_type == OSPF_ABR_IBM) | |
1295 | if (!ospf_act_bb_connection(ospf) && | |
1296 | or->path_type != OSPF_PATH_INTRA_AREA) { | |
1297 | if (IS_DEBUG_OSPF_EVENT) | |
1298 | zlog_debug( | |
1299 | "ospf_abr_process_network_rt(): ALT ABR: " | |
1300 | "No BB connection, skip not intra-area routes"); | |
1301 | continue; | |
1302 | } | |
1303 | ||
1304 | ospf_abr_announce_rtr(ospf, | |
1305 | (struct prefix_ipv4 *)&rn->p, or); | |
1306 | } | |
718e3744 | 1307 | } |
1308 | ||
d62a17ae | 1309 | if (IS_DEBUG_OSPF_EVENT) |
1310 | zlog_debug("ospf_abr_process_router_rt(): Stop"); | |
1311 | } | |
718e3744 | 1312 | |
d62a17ae | 1313 | static void |
1314 | ospf_abr_unapprove_translates(struct ospf *ospf) /* For NSSA Translations */ | |
1315 | { | |
1316 | struct ospf_lsa *lsa; | |
1317 | struct route_node *rn; | |
1318 | ||
1319 | if (IS_DEBUG_OSPF_NSSA) | |
1320 | zlog_debug("ospf_abr_unapprove_translates(): Start"); | |
1321 | ||
1322 | /* NSSA Translator is not checked, because it may have gone away, | |
1323 | and we would want to flush any residuals anyway */ | |
1324 | ||
1325 | LSDB_LOOP(EXTERNAL_LSDB(ospf), rn, lsa) | |
1326 | if (CHECK_FLAG(lsa->flags, OSPF_LSA_LOCAL_XLT)) { | |
1327 | UNSET_FLAG(lsa->flags, OSPF_LSA_APPROVED); | |
1328 | if (IS_DEBUG_OSPF_NSSA) | |
1329 | zlog_debug( | |
1330 | "ospf_abr_unapprove_translates(): " | |
1331 | "approved unset on link id %s", | |
1332 | inet_ntoa(lsa->data->id)); | |
718e3744 | 1333 | } |
718e3744 | 1334 | |
d62a17ae | 1335 | if (IS_DEBUG_OSPF_NSSA) |
1336 | zlog_debug("ospf_abr_unapprove_translates(): Stop"); | |
718e3744 | 1337 | } |
1338 | ||
d62a17ae | 1339 | static void ospf_abr_unapprove_summaries(struct ospf *ospf) |
718e3744 | 1340 | { |
d62a17ae | 1341 | struct listnode *node; |
1342 | struct ospf_area *area; | |
1343 | struct route_node *rn; | |
1344 | struct ospf_lsa *lsa; | |
718e3744 | 1345 | |
d62a17ae | 1346 | if (IS_DEBUG_OSPF_EVENT) |
1347 | zlog_debug("ospf_abr_unapprove_summaries(): Start"); | |
718e3744 | 1348 | |
d62a17ae | 1349 | for (ALL_LIST_ELEMENTS_RO(ospf->areas, node, area)) { |
1350 | if (IS_DEBUG_OSPF_EVENT) | |
1351 | zlog_debug( | |
1352 | "ospf_abr_unapprove_summaries(): " | |
1353 | "considering area %s", | |
1354 | inet_ntoa(area->area_id)); | |
1355 | LSDB_LOOP(SUMMARY_LSDB(area), rn, lsa) | |
1356 | if (ospf_lsa_is_self_originated(ospf, lsa)) { | |
1357 | if (IS_DEBUG_OSPF_EVENT) | |
1358 | zlog_debug( | |
1359 | "ospf_abr_unapprove_summaries(): " | |
1360 | "approved unset on summary link id %s", | |
1361 | inet_ntoa(lsa->data->id)); | |
1362 | UNSET_FLAG(lsa->flags, OSPF_LSA_APPROVED); | |
1363 | } | |
1364 | ||
1365 | LSDB_LOOP(ASBR_SUMMARY_LSDB(area), rn, lsa) | |
1366 | if (ospf_lsa_is_self_originated(ospf, lsa)) { | |
1367 | if (IS_DEBUG_OSPF_EVENT) | |
1368 | zlog_debug( | |
1369 | "ospf_abr_unapprove_summaries(): " | |
1370 | "approved unset on asbr-summary link id %s", | |
1371 | inet_ntoa(lsa->data->id)); | |
1372 | UNSET_FLAG(lsa->flags, OSPF_LSA_APPROVED); | |
1373 | } | |
1374 | } | |
718e3744 | 1375 | |
d62a17ae | 1376 | if (IS_DEBUG_OSPF_EVENT) |
1377 | zlog_debug("ospf_abr_unapprove_summaries(): Stop"); | |
1378 | } | |
718e3744 | 1379 | |
d62a17ae | 1380 | static void ospf_abr_prepare_aggregates(struct ospf *ospf) |
1381 | { | |
1382 | struct listnode *node; | |
1383 | struct route_node *rn; | |
1384 | struct ospf_area_range *range; | |
1385 | struct ospf_area *area; | |
1386 | ||
1387 | if (IS_DEBUG_OSPF_EVENT) | |
1388 | zlog_debug("ospf_abr_prepare_aggregates(): Start"); | |
1389 | ||
1390 | for (ALL_LIST_ELEMENTS_RO(ospf->areas, node, area)) { | |
1391 | for (rn = route_top(area->ranges); rn; rn = route_next(rn)) | |
1392 | if ((range = rn->info) != NULL) { | |
1393 | range->cost = 0; | |
1394 | range->specifics = 0; | |
1395 | } | |
1396 | } | |
718e3744 | 1397 | |
d62a17ae | 1398 | if (IS_DEBUG_OSPF_EVENT) |
1399 | zlog_debug("ospf_abr_prepare_aggregates(): Stop"); | |
1400 | } | |
718e3744 | 1401 | |
d62a17ae | 1402 | static void ospf_abr_announce_aggregates(struct ospf *ospf) |
1403 | { | |
1404 | struct ospf_area *area, *ar; | |
1405 | struct ospf_area_range *range; | |
1406 | struct route_node *rn; | |
1407 | struct prefix p; | |
1408 | struct listnode *node, *n; | |
718e3744 | 1409 | |
d62a17ae | 1410 | if (IS_DEBUG_OSPF_EVENT) |
1411 | zlog_debug("ospf_abr_announce_aggregates(): Start"); | |
718e3744 | 1412 | |
d62a17ae | 1413 | for (ALL_LIST_ELEMENTS_RO(ospf->areas, node, area)) { |
1414 | if (IS_DEBUG_OSPF_EVENT) | |
1415 | zlog_debug( | |
1416 | "ospf_abr_announce_aggregates(): looking at area %s", | |
1417 | inet_ntoa(area->area_id)); | |
1418 | ||
1419 | for (rn = route_top(area->ranges); rn; rn = route_next(rn)) | |
1420 | if ((range = rn->info)) { | |
1421 | if (!CHECK_FLAG(range->flags, | |
1422 | OSPF_AREA_RANGE_ADVERTISE)) { | |
1423 | if (IS_DEBUG_OSPF_EVENT) | |
1424 | zlog_debug( | |
1425 | "ospf_abr_announce_aggregates():" | |
1426 | " discarding suppress-ranges"); | |
1427 | continue; | |
1428 | } | |
1429 | ||
1430 | p.family = AF_INET; | |
1431 | p.u.prefix4 = range->addr; | |
1432 | p.prefixlen = range->masklen; | |
1433 | ||
1434 | if (IS_DEBUG_OSPF_EVENT) | |
1435 | zlog_debug( | |
1436 | "ospf_abr_announce_aggregates():" | |
1437 | " this is range: %s/%d", | |
1438 | inet_ntoa(p.u.prefix4), | |
1439 | p.prefixlen); | |
1440 | ||
1441 | if (CHECK_FLAG(range->flags, | |
1442 | OSPF_AREA_RANGE_SUBSTITUTE)) { | |
1443 | p.family = AF_INET; | |
1444 | p.u.prefix4 = range->subst_addr; | |
1445 | p.prefixlen = range->subst_masklen; | |
1446 | } | |
1447 | ||
1448 | if (range->specifics) { | |
1449 | if (IS_DEBUG_OSPF_EVENT) | |
1450 | zlog_debug( | |
1451 | "ospf_abr_announce_aggregates(): active range"); | |
1452 | ||
1453 | for (ALL_LIST_ELEMENTS_RO(ospf->areas, | |
1454 | n, ar)) { | |
1455 | if (ar == area) | |
1456 | continue; | |
1457 | ||
1458 | /* We do not check nexthops | |
1459 | here, because | |
1460 | intra-area routes can be | |
1461 | associated with | |
1462 | one area only */ | |
1463 | ||
1464 | /* backbone routes are not | |
1465 | summarized | |
1466 | when announced into transit | |
1467 | areas */ | |
1468 | ||
1469 | if (ospf_area_is_transit(ar) | |
1470 | && OSPF_IS_AREA_BACKBONE( | |
1471 | area)) { | |
1472 | if (IS_DEBUG_OSPF_EVENT) | |
1473 | zlog_debug( | |
1474 | "ospf_abr_announce_aggregates(): Skipping " | |
1475 | "announcement of BB aggregate into" | |
1476 | " a transit area"); | |
1477 | continue; | |
1478 | } | |
1479 | ospf_abr_announce_network_to_area( | |
1480 | (struct prefix_ipv4 | |
1481 | *)&p, | |
1482 | range->cost, ar); | |
1483 | } | |
1484 | } | |
1485 | } | |
1486 | } | |
718e3744 | 1487 | |
d62a17ae | 1488 | if (IS_DEBUG_OSPF_EVENT) |
1489 | zlog_debug("ospf_abr_announce_aggregates(): Stop"); | |
718e3744 | 1490 | } |
1491 | ||
4dadc291 | 1492 | static void |
d62a17ae | 1493 | ospf_abr_send_nssa_aggregates(struct ospf *ospf) /* temporarily turned off */ |
718e3744 | 1494 | { |
d62a17ae | 1495 | struct listnode *node; /*, n; */ |
1496 | struct ospf_area *area; /*, *ar; */ | |
1497 | struct route_node *rn; | |
1498 | struct ospf_area_range *range; | |
1499 | struct prefix_ipv4 p; | |
1500 | ||
1501 | if (IS_DEBUG_OSPF_NSSA) | |
1502 | zlog_debug("ospf_abr_send_nssa_aggregates(): Start"); | |
1503 | ||
1504 | for (ALL_LIST_ELEMENTS_RO(ospf->areas, node, area)) { | |
1505 | if (!area->NSSATranslatorState) | |
1506 | continue; | |
1507 | ||
1508 | if (IS_DEBUG_OSPF_NSSA) | |
1509 | zlog_debug( | |
1510 | "ospf_abr_send_nssa_aggregates(): looking at area %s", | |
1511 | inet_ntoa(area->area_id)); | |
1512 | ||
1513 | for (rn = route_top(area->ranges); rn; rn = route_next(rn)) { | |
1514 | if (rn->info == NULL) | |
1515 | continue; | |
1516 | ||
1517 | range = rn->info; | |
1518 | ||
1519 | if (!CHECK_FLAG(range->flags, | |
1520 | OSPF_AREA_RANGE_ADVERTISE)) { | |
1521 | if (IS_DEBUG_OSPF_NSSA) | |
1522 | zlog_debug( | |
1523 | "ospf_abr_send_nssa_aggregates():" | |
1524 | " discarding suppress-ranges"); | |
1525 | continue; | |
1526 | } | |
1527 | ||
1528 | p.family = AF_INET; | |
1529 | p.prefix = range->addr; | |
1530 | p.prefixlen = range->masklen; | |
1531 | ||
1532 | if (IS_DEBUG_OSPF_NSSA) | |
1533 | zlog_debug( | |
1534 | "ospf_abr_send_nssa_aggregates():" | |
1535 | " this is range: %s/%d", | |
1536 | inet_ntoa(p.prefix), p.prefixlen); | |
1537 | ||
1538 | if (CHECK_FLAG(range->flags, | |
1539 | OSPF_AREA_RANGE_SUBSTITUTE)) { | |
1540 | p.family = AF_INET; | |
1541 | p.prefix = range->subst_addr; | |
1542 | p.prefixlen = range->subst_masklen; | |
1543 | } | |
1544 | ||
1545 | if (range->specifics) { | |
1546 | if (IS_DEBUG_OSPF_NSSA) | |
1547 | zlog_debug( | |
1548 | "ospf_abr_send_nssa_aggregates(): active range"); | |
1549 | ||
1550 | /* Fetch LSA-Type-7 from aggregate prefix, and | |
1551 | * then | |
1552 | * translate, Install (as Type-5), Approve, and | |
1553 | * Flood | |
1554 | */ | |
1555 | ospf_abr_translate_nssa_range(&p, range->cost); | |
1556 | } | |
1557 | } /* all area ranges*/ | |
1558 | } /* all areas */ | |
1559 | ||
1560 | if (IS_DEBUG_OSPF_NSSA) | |
1561 | zlog_debug("ospf_abr_send_nssa_aggregates(): Stop"); | |
718e3744 | 1562 | } |
718e3744 | 1563 | |
d62a17ae | 1564 | static void ospf_abr_announce_stub_defaults(struct ospf *ospf) |
718e3744 | 1565 | { |
d62a17ae | 1566 | struct listnode *node; |
1567 | struct ospf_area *area; | |
1568 | struct prefix_ipv4 p; | |
718e3744 | 1569 | |
d62a17ae | 1570 | if (!IS_OSPF_ABR(ospf)) |
1571 | return; | |
718e3744 | 1572 | |
d62a17ae | 1573 | if (IS_DEBUG_OSPF_EVENT) |
1574 | zlog_debug("ospf_abr_announce_stub_defaults(): Start"); | |
1575 | ||
1576 | p.family = AF_INET; | |
1577 | p.prefix.s_addr = OSPF_DEFAULT_DESTINATION; | |
1578 | p.prefixlen = 0; | |
1579 | ||
1580 | for (ALL_LIST_ELEMENTS_RO(ospf->areas, node, area)) { | |
718e3744 | 1581 | if (IS_DEBUG_OSPF_EVENT) |
d62a17ae | 1582 | zlog_debug( |
1583 | "ospf_abr_announce_stub_defaults(): looking at area %s", | |
1584 | inet_ntoa(area->area_id)); | |
718e3744 | 1585 | |
d62a17ae | 1586 | if ((area->external_routing != OSPF_AREA_STUB) |
1587 | && (area->external_routing != OSPF_AREA_NSSA)) | |
1588 | continue; | |
718e3744 | 1589 | |
d62a17ae | 1590 | if (OSPF_IS_AREA_BACKBONE(area)) |
1591 | continue; /* Sanity Check */ | |
718e3744 | 1592 | |
d62a17ae | 1593 | if (IS_DEBUG_OSPF_EVENT) |
1594 | zlog_debug( | |
1595 | "ospf_abr_announce_stub_defaults(): " | |
1596 | "announcing 0.0.0.0/0 to area %s", | |
1597 | inet_ntoa(area->area_id)); | |
1598 | ospf_abr_announce_network_to_area(&p, area->default_cost, area); | |
1599 | } | |
718e3744 | 1600 | |
d62a17ae | 1601 | if (IS_DEBUG_OSPF_EVENT) |
1602 | zlog_debug("ospf_abr_announce_stub_defaults(): Stop"); | |
718e3744 | 1603 | } |
1604 | ||
d62a17ae | 1605 | static int ospf_abr_remove_unapproved_translates_apply(struct ospf *ospf, |
1606 | struct ospf_lsa *lsa) | |
718e3744 | 1607 | { |
d62a17ae | 1608 | if (CHECK_FLAG(lsa->flags, OSPF_LSA_LOCAL_XLT) |
1609 | && !CHECK_FLAG(lsa->flags, OSPF_LSA_APPROVED)) { | |
1610 | zlog_info( | |
1611 | "ospf_abr_remove_unapproved_translates(): " | |
1612 | "removing unapproved translates, ID: %s", | |
1613 | inet_ntoa(lsa->data->id)); | |
718e3744 | 1614 | |
d62a17ae | 1615 | /* FLUSH THROUGHOUT AS */ |
1616 | ospf_lsa_flush_as(ospf, lsa); | |
718e3744 | 1617 | |
d62a17ae | 1618 | /* DISCARD from LSDB */ |
1619 | } | |
1620 | return 0; | |
718e3744 | 1621 | } |
1622 | ||
d62a17ae | 1623 | static void ospf_abr_remove_unapproved_translates(struct ospf *ospf) |
718e3744 | 1624 | { |
d62a17ae | 1625 | struct route_node *rn; |
1626 | struct ospf_lsa *lsa; | |
718e3744 | 1627 | |
d62a17ae | 1628 | /* All AREA PROCESS should have APPROVED necessary LSAs */ |
1629 | /* Remove any left over and not APPROVED */ | |
1630 | if (IS_DEBUG_OSPF_NSSA) | |
1631 | zlog_debug("ospf_abr_remove_unapproved_translates(): Start"); | |
718e3744 | 1632 | |
d62a17ae | 1633 | LSDB_LOOP(EXTERNAL_LSDB(ospf), rn, lsa) |
1634 | ospf_abr_remove_unapproved_translates_apply(ospf, lsa); | |
1635 | ||
1636 | if (IS_DEBUG_OSPF_NSSA) | |
1637 | zlog_debug("ospf_abr_remove_unapproved_translates(): Stop"); | |
718e3744 | 1638 | } |
718e3744 | 1639 | |
d62a17ae | 1640 | static void ospf_abr_remove_unapproved_summaries(struct ospf *ospf) |
718e3744 | 1641 | { |
d62a17ae | 1642 | struct listnode *node; |
1643 | struct ospf_area *area; | |
1644 | struct route_node *rn; | |
1645 | struct ospf_lsa *lsa; | |
1646 | ||
1647 | if (IS_DEBUG_OSPF_EVENT) | |
1648 | zlog_debug("ospf_abr_remove_unapproved_summaries(): Start"); | |
1649 | ||
1650 | for (ALL_LIST_ELEMENTS_RO(ospf->areas, node, area)) { | |
1651 | if (IS_DEBUG_OSPF_EVENT) | |
1652 | zlog_debug( | |
1653 | "ospf_abr_remove_unapproved_summaries(): " | |
1654 | "looking at area %s", | |
1655 | inet_ntoa(area->area_id)); | |
1656 | ||
1657 | LSDB_LOOP(SUMMARY_LSDB(area), rn, lsa) | |
1658 | if (ospf_lsa_is_self_originated(ospf, lsa)) | |
1659 | if (!CHECK_FLAG(lsa->flags, OSPF_LSA_APPROVED)) | |
1660 | ospf_lsa_flush_area(lsa, area); | |
1661 | ||
1662 | LSDB_LOOP(ASBR_SUMMARY_LSDB(area), rn, lsa) | |
1663 | if (ospf_lsa_is_self_originated(ospf, lsa)) | |
1664 | if (!CHECK_FLAG(lsa->flags, OSPF_LSA_APPROVED)) | |
1665 | ospf_lsa_flush_area(lsa, area); | |
1666 | } | |
1667 | ||
1668 | if (IS_DEBUG_OSPF_EVENT) | |
1669 | zlog_debug("ospf_abr_remove_unapproved_summaries(): Stop"); | |
718e3744 | 1670 | } |
1671 | ||
d62a17ae | 1672 | static void ospf_abr_manage_discard_routes(struct ospf *ospf) |
718e3744 | 1673 | { |
d62a17ae | 1674 | struct listnode *node, *nnode; |
1675 | struct route_node *rn; | |
1676 | struct ospf_area *area; | |
1677 | struct ospf_area_range *range; | |
1678 | ||
1679 | for (ALL_LIST_ELEMENTS(ospf->areas, node, nnode, area)) | |
1680 | for (rn = route_top(area->ranges); rn; rn = route_next(rn)) | |
1681 | if ((range = rn->info) != NULL) | |
1682 | if (CHECK_FLAG(range->flags, | |
1683 | OSPF_AREA_RANGE_ADVERTISE)) { | |
1684 | if (range->specifics) | |
1685 | ospf_add_discard_route( | |
1686 | ospf->new_table, area, | |
1687 | (struct prefix_ipv4 | |
1688 | *)&rn->p); | |
1689 | else | |
1690 | ospf_delete_discard_route( | |
1691 | ospf->new_table, | |
1692 | (struct prefix_ipv4 | |
1693 | *)&rn->p); | |
1694 | } | |
718e3744 | 1695 | } |
1696 | ||
718e3744 | 1697 | /* This is the function taking care about ABR NSSA, i.e. NSSA |
1698 | Translator, -LSA aggregation and flooding. For all NSSAs | |
1699 | ||
1700 | Any SELF-AS-LSA is in the Type-5 LSDB and Type-7 LSDB. These LSA's | |
1701 | are refreshed from the Type-5 LSDB, installed into the Type-7 LSDB | |
1702 | with the P-bit set. | |
1703 | ||
1704 | Any received Type-5s are legal for an ABR, else illegal for IR. | |
1705 | Received Type-7s are installed, by area, with incoming P-bit. They | |
1706 | are flooded; if the Elected NSSA Translator, then P-bit off. | |
1707 | ||
1708 | Additionally, this ABR will place "translated type-7's" into the | |
1709 | Type-5 LSDB in order to keep track of APPROVAL or not. | |
1710 | ||
1711 | It will scan through every area, looking for Type-7 LSAs with P-Bit | |
1712 | SET. The Type-7's are either AS-FLOODED & 5-INSTALLED or | |
1713 | AGGREGATED. Later, the AGGREGATED LSAs are AS-FLOODED & | |
1714 | 5-INSTALLED. | |
1715 | ||
1716 | 5-INSTALLED is into the Type-5 LSDB; Any UNAPPROVED Type-5 LSAs | |
1717 | left over are FLUSHED and DISCARDED. | |
1718 | ||
1719 | For External Calculations, any NSSA areas use the Type-7 AREA-LSDB, | |
1720 | any ABR-non-NSSA areas use the Type-5 GLOBAL-LSDB. */ | |
1721 | ||
d62a17ae | 1722 | static void ospf_abr_nssa_task(struct ospf *ospf) /* called only if any_nssa */ |
718e3744 | 1723 | { |
d62a17ae | 1724 | if (IS_DEBUG_OSPF_NSSA) |
1725 | zlog_debug("Check for NSSA-ABR Tasks():"); | |
1726 | ||
1727 | if (!IS_OSPF_ABR(ospf)) | |
1728 | return; | |
1729 | ||
1730 | if (!ospf->anyNSSA) | |
1731 | return; | |
1732 | ||
1733 | /* Each area must confirm TranslatorRole */ | |
1734 | if (IS_DEBUG_OSPF_NSSA) | |
1735 | zlog_debug("ospf_abr_nssa_task(): Start"); | |
1736 | ||
1737 | /* For all Global Entries flagged "local-translate", unset APPROVED */ | |
1738 | if (IS_DEBUG_OSPF_NSSA) | |
1739 | zlog_debug("ospf_abr_nssa_task(): unapprove translates"); | |
1740 | ||
1741 | ospf_abr_unapprove_translates(ospf); | |
1742 | ||
1743 | /* RESET all Ranges in every Area, same as summaries */ | |
1744 | if (IS_DEBUG_OSPF_NSSA) | |
1745 | zlog_debug("ospf_abr_nssa_task(): NSSA initialize aggregates"); | |
1746 | ospf_abr_prepare_aggregates(ospf); /*TURNED OFF just for now */ | |
1747 | ||
1748 | /* For all NSSAs, Type-7s, translate to 5's, INSTALL/FLOOD, or | |
1749 | * Aggregate as Type-7 | |
1750 | * Install or Approve in Type-5 Global LSDB | |
1751 | */ | |
1752 | if (IS_DEBUG_OSPF_NSSA) | |
1753 | zlog_debug("ospf_abr_nssa_task(): process translates"); | |
1754 | ospf_abr_process_nssa_translates(ospf); | |
1755 | ||
1756 | /* Translate/Send any "ranged" aggregates, and also 5-Install and | |
1757 | * Approve | |
1758 | * Scan Type-7's for aggregates, translate to Type-5's, | |
1759 | * Install/Flood/Approve | |
1760 | */ | |
1761 | if (IS_DEBUG_OSPF_NSSA) | |
1762 | zlog_debug("ospf_abr_nssa_task(): send NSSA aggregates"); | |
1763 | ospf_abr_send_nssa_aggregates(ospf); /*TURNED OFF FOR NOW */ | |
1764 | ||
1765 | /* Send any NSSA defaults as Type-5 | |
1766 | *if (IS_DEBUG_OSPF_NSSA) | |
1767 | * zlog_debug ("ospf_abr_nssa_task(): announce nssa defaults"); | |
1768 | *ospf_abr_announce_nssa_defaults (ospf); | |
1769 | * havnt a clue what above is supposed to do. | |
1770 | */ | |
1771 | ||
1772 | /* Flush any unapproved previous translates from Global Data Base */ | |
1773 | if (IS_DEBUG_OSPF_NSSA) | |
1774 | zlog_debug( | |
1775 | "ospf_abr_nssa_task(): remove unapproved translates"); | |
1776 | ospf_abr_remove_unapproved_translates(ospf); | |
1777 | ||
1778 | ospf_abr_manage_discard_routes(ospf); /* same as normal...discard */ | |
1779 | ||
1780 | if (IS_DEBUG_OSPF_NSSA) | |
1781 | zlog_debug("ospf_abr_nssa_task(): Stop"); | |
718e3744 | 1782 | } |
718e3744 | 1783 | |
1784 | /* This is the function taking care about ABR stuff, i.e. | |
1785 | summary-LSA origination and flooding. */ | |
d62a17ae | 1786 | void ospf_abr_task(struct ospf *ospf) |
718e3744 | 1787 | { |
d62a17ae | 1788 | if (IS_DEBUG_OSPF_EVENT) |
1789 | zlog_debug("ospf_abr_task(): Start"); | |
1790 | ||
1791 | if (ospf->new_table == NULL || ospf->new_rtrs == NULL) { | |
1792 | if (IS_DEBUG_OSPF_EVENT) | |
1793 | zlog_debug( | |
1794 | "ospf_abr_task(): Routing tables are not yet ready"); | |
1795 | return; | |
1796 | } | |
1797 | ||
1798 | if (IS_DEBUG_OSPF_EVENT) | |
1799 | zlog_debug("ospf_abr_task(): unapprove summaries"); | |
1800 | ospf_abr_unapprove_summaries(ospf); | |
1801 | ||
1802 | if (IS_DEBUG_OSPF_EVENT) | |
1803 | zlog_debug("ospf_abr_task(): prepare aggregates"); | |
1804 | ospf_abr_prepare_aggregates(ospf); | |
1805 | ||
1806 | if (IS_OSPF_ABR(ospf)) { | |
1807 | if (IS_DEBUG_OSPF_EVENT) | |
1808 | zlog_debug("ospf_abr_task(): process network RT"); | |
1809 | ospf_abr_process_network_rt(ospf, ospf->new_table); | |
1810 | ||
1811 | if (IS_DEBUG_OSPF_EVENT) | |
1812 | zlog_debug("ospf_abr_task(): process router RT"); | |
1813 | ospf_abr_process_router_rt(ospf, ospf->new_rtrs); | |
1814 | ||
1815 | if (IS_DEBUG_OSPF_EVENT) | |
1816 | zlog_debug("ospf_abr_task(): announce aggregates"); | |
1817 | ospf_abr_announce_aggregates(ospf); | |
1818 | ||
1819 | if (IS_DEBUG_OSPF_EVENT) | |
1820 | zlog_debug("ospf_abr_task(): announce stub defaults"); | |
1821 | ospf_abr_announce_stub_defaults(ospf); | |
1822 | } | |
1823 | ||
1824 | if (IS_DEBUG_OSPF_EVENT) | |
1825 | zlog_debug("ospf_abr_task(): remove unapproved summaries"); | |
1826 | ospf_abr_remove_unapproved_summaries(ospf); | |
1827 | ||
1828 | ospf_abr_manage_discard_routes(ospf); | |
1829 | ||
1830 | if (IS_DEBUG_OSPF_EVENT) | |
1831 | zlog_debug("ospf_abr_task(): Stop"); | |
718e3744 | 1832 | } |
1833 | ||
d62a17ae | 1834 | static int ospf_abr_task_timer(struct thread *thread) |
718e3744 | 1835 | { |
d62a17ae | 1836 | struct ospf *ospf = THREAD_ARG(thread); |
147193a2 | 1837 | |
d62a17ae | 1838 | ospf->t_abr_task = 0; |
718e3744 | 1839 | |
d62a17ae | 1840 | if (IS_DEBUG_OSPF_EVENT) |
1841 | zlog_debug("Running ABR task on timer"); | |
718e3744 | 1842 | |
d62a17ae | 1843 | ospf_check_abr_status(ospf); |
1844 | ospf_abr_nssa_check_status(ospf); | |
718e3744 | 1845 | |
d62a17ae | 1846 | ospf_abr_task(ospf); |
1847 | ospf_abr_nssa_task(ospf); /* if nssa-abr, then scan Type-7 LSDB */ | |
718e3744 | 1848 | |
d62a17ae | 1849 | return 0; |
718e3744 | 1850 | } |
1851 | ||
d62a17ae | 1852 | void ospf_schedule_abr_task(struct ospf *ospf) |
718e3744 | 1853 | { |
d62a17ae | 1854 | if (IS_DEBUG_OSPF_EVENT) |
1855 | zlog_debug("Scheduling ABR task"); | |
147193a2 | 1856 | |
d62a17ae | 1857 | thread_add_timer(master, ospf_abr_task_timer, ospf, OSPF_ABR_TASK_DELAY, |
1858 | &ospf->t_abr_task); | |
718e3744 | 1859 | } |