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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. | |
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 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with GNU Zebra; see the file COPYING. If not, write to the Free | |
19 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA | |
20 | * 02111-1307, USA. | |
21 | */ | |
22 | ||
23 | ||
24 | #include <zebra.h> | |
25 | ||
26 | #include "thread.h" | |
27 | #include "memory.h" | |
28 | #include "linklist.h" | |
29 | #include "prefix.h" | |
30 | #include "if.h" | |
31 | #include "table.h" | |
32 | #include "vty.h" | |
33 | #include "filter.h" | |
34 | #include "plist.h" | |
35 | #include "log.h" | |
36 | ||
37 | #include "ospfd/ospfd.h" | |
38 | #include "ospfd/ospf_interface.h" | |
39 | #include "ospfd/ospf_ism.h" | |
40 | #include "ospfd/ospf_asbr.h" | |
41 | #include "ospfd/ospf_lsa.h" | |
42 | #include "ospfd/ospf_lsdb.h" | |
43 | #include "ospfd/ospf_neighbor.h" | |
44 | #include "ospfd/ospf_nsm.h" | |
45 | #include "ospfd/ospf_spf.h" | |
46 | #include "ospfd/ospf_route.h" | |
47 | #include "ospfd/ospf_ia.h" | |
48 | #include "ospfd/ospf_flood.h" | |
49 | #include "ospfd/ospf_abr.h" | |
50 | #include "ospfd/ospf_ase.h" | |
51 | #include "ospfd/ospf_zebra.h" | |
52 | #include "ospfd/ospf_dump.h" | |
6b0655a2 | 53 | |
4dadc291 | 54 | static struct ospf_area_range * |
718e3744 | 55 | ospf_area_range_new (struct prefix_ipv4 *p) |
56 | { | |
57 | struct ospf_area_range *range; | |
58 | ||
59 | range = XCALLOC (MTYPE_OSPF_AREA_RANGE, sizeof (struct ospf_area_range)); | |
60 | range->addr = p->prefix; | |
61 | range->masklen = p->prefixlen; | |
62 | range->cost_config = OSPF_AREA_RANGE_COST_UNSPEC; | |
63 | ||
64 | return range; | |
65 | } | |
66 | ||
4dadc291 | 67 | static void |
718e3744 | 68 | ospf_area_range_free (struct ospf_area_range *range) |
69 | { | |
70 | XFREE (MTYPE_OSPF_AREA_RANGE, range); | |
71 | } | |
72 | ||
4dadc291 | 73 | static void |
718e3744 | 74 | ospf_area_range_add (struct ospf_area *area, struct ospf_area_range *range) |
75 | { | |
76 | struct route_node *rn; | |
77 | struct prefix_ipv4 p; | |
78 | ||
79 | p.family = AF_INET; | |
80 | p.prefixlen = range->masklen; | |
81 | p.prefix = range->addr; | |
82 | ||
83 | rn = route_node_get (area->ranges, (struct prefix *)&p); | |
84 | if (rn->info) | |
85 | route_unlock_node (rn); | |
86 | else | |
87 | rn->info = range; | |
88 | } | |
89 | ||
4dadc291 | 90 | static void |
8fc9e007 | 91 | ospf_area_range_delete (struct ospf_area *area, struct route_node *rn) |
718e3744 | 92 | { |
8fc9e007 | 93 | struct ospf_area_range *range = rn->info; |
718e3744 | 94 | |
8fc9e007 JR |
95 | if (range->specifics != 0) |
96 | ospf_delete_discard_route (area->ospf->new_table, | |
97 | (struct prefix_ipv4 *) &rn->p); | |
718e3744 | 98 | |
8fc9e007 JR |
99 | ospf_area_range_free (range); |
100 | rn->info = NULL; | |
101 | route_unlock_node (rn); | |
102 | route_unlock_node (rn); | |
718e3744 | 103 | } |
104 | ||
105 | struct ospf_area_range * | |
106 | ospf_area_range_lookup (struct ospf_area *area, struct prefix_ipv4 *p) | |
107 | { | |
108 | struct route_node *rn; | |
109 | ||
110 | rn = route_node_lookup (area->ranges, (struct prefix *)p); | |
111 | if (rn) | |
112 | { | |
113 | route_unlock_node (rn); | |
114 | return rn->info; | |
115 | } | |
116 | return NULL; | |
117 | } | |
118 | ||
119 | struct ospf_area_range * | |
d4a53d58 | 120 | ospf_area_range_lookup_next (struct ospf_area *area, |
121 | struct in_addr *range_net, | |
122 | int first) | |
718e3744 | 123 | { |
124 | struct route_node *rn; | |
125 | struct prefix_ipv4 p; | |
126 | struct ospf_area_range *find; | |
127 | ||
128 | p.family = AF_INET; | |
129 | p.prefixlen = IPV4_MAX_BITLEN; | |
130 | p.prefix = *range_net; | |
131 | ||
132 | if (first) | |
133 | rn = route_top (area->ranges); | |
134 | else | |
135 | { | |
136 | rn = route_node_get (area->ranges, (struct prefix *) &p); | |
137 | rn = route_next (rn); | |
138 | } | |
139 | ||
140 | for (; rn; rn = route_next (rn)) | |
141 | if (rn->info) | |
142 | break; | |
143 | ||
144 | if (rn && rn->info) | |
145 | { | |
146 | find = rn->info; | |
147 | *range_net = rn->p.u.prefix4; | |
148 | route_unlock_node (rn); | |
149 | return find; | |
150 | } | |
151 | return NULL; | |
152 | } | |
153 | ||
4dadc291 | 154 | static struct ospf_area_range * |
718e3744 | 155 | ospf_area_range_match (struct ospf_area *area, struct prefix_ipv4 *p) |
156 | { | |
157 | struct route_node *node; | |
158 | ||
159 | node = route_node_match (area->ranges, (struct prefix *) p); | |
160 | if (node) | |
161 | { | |
162 | route_unlock_node (node); | |
163 | return node->info; | |
164 | } | |
165 | return NULL; | |
166 | } | |
167 | ||
168 | struct ospf_area_range * | |
169 | ospf_area_range_match_any (struct ospf *ospf, struct prefix_ipv4 *p) | |
170 | { | |
171 | struct ospf_area_range *range; | |
1eb8ef25 | 172 | struct ospf_area *area; |
52dc7ee6 | 173 | struct listnode *node; |
718e3744 | 174 | |
1eb8ef25 | 175 | for (ALL_LIST_ELEMENTS_RO (ospf->areas, node, area)) |
176 | if ((range = ospf_area_range_match (area, p))) | |
718e3744 | 177 | return range; |
178 | ||
179 | return NULL; | |
180 | } | |
181 | ||
182 | int | |
183 | ospf_area_range_active (struct ospf_area_range *range) | |
184 | { | |
185 | return range->specifics; | |
186 | } | |
187 | ||
4dadc291 | 188 | static int |
718e3744 | 189 | ospf_area_actively_attached (struct ospf_area *area) |
190 | { | |
191 | return area->act_ints; | |
192 | } | |
193 | ||
194 | int | |
195 | ospf_area_range_set (struct ospf *ospf, struct in_addr area_id, | |
196 | struct prefix_ipv4 *p, int advertise) | |
197 | { | |
198 | struct ospf_area *area; | |
199 | struct ospf_area_range *range; | |
147193a2 | 200 | int ret = OSPF_AREA_ID_FORMAT_ADDRESS; |
718e3744 | 201 | |
147193a2 | 202 | area = ospf_area_get (ospf, area_id, ret); |
718e3744 | 203 | if (area == NULL) |
204 | return 0; | |
205 | ||
206 | range = ospf_area_range_lookup (area, p); | |
207 | if (range != NULL) | |
208 | { | |
209 | if ((CHECK_FLAG (range->flags, OSPF_AREA_RANGE_ADVERTISE) | |
210 | && !CHECK_FLAG (advertise, OSPF_AREA_RANGE_ADVERTISE)) | |
211 | || (!CHECK_FLAG (range->flags, OSPF_AREA_RANGE_ADVERTISE) | |
212 | && CHECK_FLAG (advertise, OSPF_AREA_RANGE_ADVERTISE))) | |
147193a2 | 213 | ospf_schedule_abr_task (ospf); |
718e3744 | 214 | } |
215 | else | |
216 | { | |
217 | range = ospf_area_range_new (p); | |
218 | ospf_area_range_add (area, range); | |
147193a2 | 219 | ospf_schedule_abr_task (ospf); |
718e3744 | 220 | } |
221 | ||
222 | if (CHECK_FLAG (advertise, OSPF_AREA_RANGE_ADVERTISE)) | |
223 | SET_FLAG (range->flags, OSPF_AREA_RANGE_ADVERTISE); | |
224 | else | |
225 | UNSET_FLAG (range->flags, OSPF_AREA_RANGE_ADVERTISE); | |
226 | ||
227 | return 1; | |
228 | } | |
229 | ||
230 | int | |
231 | ospf_area_range_cost_set (struct ospf *ospf, struct in_addr area_id, | |
232 | struct prefix_ipv4 *p, u_int32_t cost) | |
233 | { | |
234 | struct ospf_area *area; | |
235 | struct ospf_area_range *range; | |
147193a2 | 236 | int ret = OSPF_AREA_ID_FORMAT_ADDRESS; |
718e3744 | 237 | |
147193a2 | 238 | area = ospf_area_get (ospf, area_id, ret); |
718e3744 | 239 | if (area == NULL) |
240 | return 0; | |
241 | ||
214a4454 | 242 | range = ospf_area_range_lookup (area, p); |
718e3744 | 243 | if (range == NULL) |
244 | return 0; | |
245 | ||
246 | if (range->cost_config != cost) | |
247 | { | |
248 | range->cost_config = cost; | |
249 | if (ospf_area_range_active (range)) | |
147193a2 | 250 | ospf_schedule_abr_task (ospf); |
718e3744 | 251 | } |
252 | ||
253 | return 1; | |
254 | } | |
255 | ||
256 | int | |
257 | ospf_area_range_unset (struct ospf *ospf, struct in_addr area_id, | |
258 | struct prefix_ipv4 *p) | |
259 | { | |
260 | struct ospf_area *area; | |
8fc9e007 | 261 | struct route_node *rn; |
718e3744 | 262 | |
147193a2 | 263 | area = ospf_area_lookup_by_area_id (ospf, area_id); |
718e3744 | 264 | if (area == NULL) |
265 | return 0; | |
266 | ||
8fc9e007 JR |
267 | rn = route_node_lookup (area->ranges, (struct prefix*)p); |
268 | if (rn == NULL) | |
718e3744 | 269 | return 0; |
270 | ||
8fc9e007 | 271 | if (ospf_area_range_active (rn->info)) |
147193a2 | 272 | ospf_schedule_abr_task (ospf); |
718e3744 | 273 | |
8fc9e007 | 274 | ospf_area_range_delete (area, rn); |
718e3744 | 275 | |
276 | return 1; | |
277 | } | |
278 | ||
279 | int | |
280 | ospf_area_range_substitute_set (struct ospf *ospf, struct in_addr area_id, | |
281 | struct prefix_ipv4 *p, struct prefix_ipv4 *s) | |
282 | { | |
283 | struct ospf_area *area; | |
284 | struct ospf_area_range *range; | |
147193a2 | 285 | int ret = OSPF_AREA_ID_FORMAT_ADDRESS; |
718e3744 | 286 | |
147193a2 | 287 | area = ospf_area_get (ospf, area_id, ret); |
718e3744 | 288 | range = ospf_area_range_lookup (area, p); |
289 | ||
290 | if (range != NULL) | |
291 | { | |
292 | if (!CHECK_FLAG (range->flags, OSPF_AREA_RANGE_ADVERTISE) || | |
293 | !CHECK_FLAG (range->flags, OSPF_AREA_RANGE_SUBSTITUTE)) | |
147193a2 | 294 | ospf_schedule_abr_task (ospf); |
718e3744 | 295 | } |
296 | else | |
297 | { | |
298 | range = ospf_area_range_new (p); | |
299 | ospf_area_range_add (area, range); | |
147193a2 | 300 | ospf_schedule_abr_task (ospf); |
718e3744 | 301 | } |
302 | ||
303 | SET_FLAG (range->flags, OSPF_AREA_RANGE_ADVERTISE); | |
304 | SET_FLAG (range->flags, OSPF_AREA_RANGE_SUBSTITUTE); | |
305 | range->subst_addr = s->prefix; | |
306 | range->subst_masklen = s->prefixlen; | |
307 | ||
308 | return 1; | |
309 | } | |
310 | ||
311 | int | |
312 | ospf_area_range_substitute_unset (struct ospf *ospf, struct in_addr area_id, | |
313 | struct prefix_ipv4 *p) | |
314 | { | |
315 | struct ospf_area *area; | |
316 | struct ospf_area_range *range; | |
317 | ||
147193a2 | 318 | area = ospf_area_lookup_by_area_id (ospf, area_id); |
718e3744 | 319 | if (area == NULL) |
320 | return 0; | |
321 | ||
322 | range = ospf_area_range_lookup (area, p); | |
323 | if (range == NULL) | |
324 | return 0; | |
325 | ||
326 | if (CHECK_FLAG (range->flags, OSPF_AREA_RANGE_SUBSTITUTE)) | |
327 | if (ospf_area_range_active (range)) | |
147193a2 | 328 | ospf_schedule_abr_task (ospf); |
718e3744 | 329 | |
330 | UNSET_FLAG (range->flags, OSPF_AREA_RANGE_SUBSTITUTE); | |
331 | range->subst_addr.s_addr = 0; | |
332 | range->subst_masklen = 0; | |
333 | ||
334 | return 1; | |
335 | } | |
336 | ||
337 | int | |
147193a2 | 338 | ospf_act_bb_connection (struct ospf *ospf) |
718e3744 | 339 | { |
147193a2 | 340 | if (ospf->backbone == NULL) |
718e3744 | 341 | return 0; |
342 | ||
147193a2 | 343 | return ospf->backbone->full_nbrs; |
718e3744 | 344 | } |
345 | ||
e2c6c153 | 346 | /* Determine whether this router is elected translator or not for area */ |
4dadc291 | 347 | static int |
e2c6c153 | 348 | ospf_abr_nssa_am_elected (struct ospf_area *area) |
349 | { | |
350 | struct route_node *rn; | |
351 | struct ospf_lsa *lsa; | |
352 | struct router_lsa *rlsa; | |
353 | struct in_addr *best = NULL; | |
354 | ||
355 | LSDB_LOOP ( ROUTER_LSDB (area), rn, lsa) | |
356 | { | |
357 | /* sanity checks */ | |
358 | if (!lsa | |
359 | || (lsa->data->type != OSPF_ROUTER_LSA) | |
360 | || IS_LSA_SELF (lsa)) | |
361 | continue; | |
362 | ||
363 | rlsa = (struct router_lsa *) lsa->data; | |
364 | ||
365 | /* ignore non-ABR routers */ | |
366 | if (!IS_ROUTER_LSA_BORDER (rlsa)) | |
367 | continue; | |
368 | ||
369 | /* Router has Nt flag - always translate */ | |
370 | if (IS_ROUTER_LSA_NT (rlsa)) | |
371 | { | |
372 | if (IS_DEBUG_OSPF_NSSA) | |
e84cc647 | 373 | zlog_debug ("ospf_abr_nssa_am_elected: " |
e2c6c153 | 374 | "router %s asserts Nt", |
375 | inet_ntoa (lsa->data->id) ); | |
376 | return 0; | |
377 | } | |
378 | ||
379 | if (best == NULL) | |
380 | best = &lsa->data->id; | |
381 | else | |
4e677f52 | 382 | if (IPV4_ADDR_CMP (&best->s_addr, &lsa->data->id.s_addr) < 0) |
e2c6c153 | 383 | best = &lsa->data->id; |
384 | } | |
385 | ||
386 | if (IS_DEBUG_OSPF_NSSA) | |
e84cc647 | 387 | zlog_debug ("ospf_abr_nssa_am_elected: best electable ABR is: %s", |
e2c6c153 | 388 | (best) ? inet_ntoa (*best) : "<none>" ); |
389 | ||
390 | if (best == NULL) | |
391 | return 1; | |
392 | ||
4e677f52 | 393 | if (IPV4_ADDR_CMP (&best->s_addr, &area->ospf->router_id.s_addr) < 0) |
e2c6c153 | 394 | return 1; |
395 | else | |
396 | return 0; | |
397 | } | |
398 | ||
399 | /* Check NSSA ABR status | |
400 | * assumes there are nssa areas | |
401 | */ | |
4dadc291 | 402 | static void |
e2c6c153 | 403 | ospf_abr_nssa_check_status (struct ospf *ospf) |
404 | { | |
405 | struct ospf_area *area; | |
1eb8ef25 | 406 | struct listnode *lnode, *nnode; |
9560fa8a | 407 | |
1eb8ef25 | 408 | for (ALL_LIST_ELEMENTS (ospf->areas, lnode, nnode, area)) |
e2c6c153 | 409 | { |
9560fa8a PJ |
410 | u_char old_state = area->NSSATranslatorState; |
411 | ||
e2c6c153 | 412 | if (area->external_routing != OSPF_AREA_NSSA) |
413 | continue; | |
9560fa8a | 414 | |
e2c6c153 | 415 | if (IS_DEBUG_OSPF (nssa, NSSA)) |
e84cc647 | 416 | zlog_debug ("ospf_abr_nssa_check_status: " |
e2c6c153 | 417 | "checking area %s", |
418 | inet_ntoa (area->area_id)); | |
9560fa8a | 419 | |
e2c6c153 | 420 | if (!IS_OSPF_ABR (area->ospf)) |
421 | { | |
422 | if (IS_DEBUG_OSPF (nssa, NSSA)) | |
9560fa8a PJ |
423 | zlog_debug ("ospf_abr_nssa_check_status: " |
424 | "not ABR"); | |
d4a53d58 | 425 | area->NSSATranslatorState = OSPF_NSSA_TRANSLATE_DISABLED; |
e2c6c153 | 426 | } |
9560fa8a PJ |
427 | else |
428 | { | |
429 | switch (area->NSSATranslatorRole) | |
430 | { | |
431 | case OSPF_NSSA_ROLE_NEVER: | |
432 | /* We never Translate Type-7 LSA. */ | |
433 | /* TODO: check previous state and flush? */ | |
434 | if (IS_DEBUG_OSPF (nssa, NSSA)) | |
435 | zlog_debug ("ospf_abr_nssa_check_status: " | |
436 | "never translate"); | |
437 | area->NSSATranslatorState = OSPF_NSSA_TRANSLATE_DISABLED; | |
438 | break; | |
439 | ||
440 | case OSPF_NSSA_ROLE_ALWAYS: | |
441 | /* We always translate if we are an ABR | |
442 | * TODO: originate new LSAs if state change? | |
443 | * or let the nssa abr task take care of it? | |
444 | */ | |
445 | if (IS_DEBUG_OSPF (nssa, NSSA)) | |
446 | zlog_debug ("ospf_abr_nssa_check_status: " | |
447 | "translate always"); | |
448 | area->NSSATranslatorState = OSPF_NSSA_TRANSLATE_ENABLED; | |
449 | break; | |
450 | ||
451 | case OSPF_NSSA_ROLE_CANDIDATE: | |
452 | /* We are a candidate for Translation */ | |
453 | if (ospf_abr_nssa_am_elected (area) > 0) | |
454 | { | |
455 | area->NSSATranslatorState = OSPF_NSSA_TRANSLATE_ENABLED; | |
456 | if (IS_DEBUG_OSPF (nssa, NSSA)) | |
457 | zlog_debug ("ospf_abr_nssa_check_status: " | |
458 | "elected translator"); | |
459 | } | |
460 | else | |
461 | { | |
462 | area->NSSATranslatorState = OSPF_NSSA_TRANSLATE_DISABLED; | |
463 | if (IS_DEBUG_OSPF (nssa, NSSA)) | |
464 | zlog_debug ("ospf_abr_nssa_check_status: " "not elected"); | |
465 | } | |
466 | break; | |
467 | } | |
468 | } | |
469 | /* RFC3101, 3.1: | |
470 | * All NSSA border routers must set the E-bit in the Type-1 router-LSAs | |
471 | * of their directly attached non-stub areas, even when they are not | |
472 | * translating. | |
473 | */ | |
474 | if (old_state != area->NSSATranslatorState) | |
475 | { | |
476 | if (old_state == OSPF_NSSA_TRANSLATE_DISABLED) | |
477 | ospf_asbr_status_update (ospf, ++ospf->redistribute); | |
478 | else if (area->NSSATranslatorState == OSPF_NSSA_TRANSLATE_DISABLED) | |
479 | ospf_asbr_status_update (ospf, --ospf->redistribute); | |
480 | } | |
e2c6c153 | 481 | } |
482 | } | |
e2c6c153 | 483 | |
718e3744 | 484 | /* Check area border router status. */ |
485 | void | |
147193a2 | 486 | ospf_check_abr_status (struct ospf *ospf) |
718e3744 | 487 | { |
488 | struct ospf_area *area; | |
1eb8ef25 | 489 | struct listnode *node, *nnode; |
718e3744 | 490 | int bb_configured = 0; |
491 | int bb_act_attached = 0; | |
492 | int areas_configured = 0; | |
493 | int areas_act_attached = 0; | |
147193a2 | 494 | u_char new_flags = ospf->flags; |
718e3744 | 495 | |
496 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 497 | zlog_debug ("ospf_check_abr_status(): Start"); |
718e3744 | 498 | |
1eb8ef25 | 499 | for (ALL_LIST_ELEMENTS (ospf->areas, node, nnode, area)) |
718e3744 | 500 | { |
718e3744 | 501 | if (listcount (area->oiflist)) |
502 | { | |
503 | areas_configured++; | |
504 | ||
505 | if (OSPF_IS_AREA_BACKBONE (area)) | |
506 | bb_configured = 1; | |
507 | } | |
508 | ||
509 | if (ospf_area_actively_attached (area)) | |
510 | { | |
511 | areas_act_attached++; | |
512 | ||
513 | if (OSPF_IS_AREA_BACKBONE (area)) | |
514 | bb_act_attached = 1; | |
515 | } | |
516 | } | |
517 | ||
518 | if (IS_DEBUG_OSPF_EVENT) | |
519 | { | |
e84cc647 | 520 | zlog_debug ("ospf_check_abr_status(): looked through areas"); |
521 | zlog_debug ("ospf_check_abr_status(): bb_configured: %d", bb_configured); | |
522 | zlog_debug ("ospf_check_abr_status(): bb_act_attached: %d", | |
718e3744 | 523 | bb_act_attached); |
e84cc647 | 524 | zlog_debug ("ospf_check_abr_status(): areas_configured: %d", |
718e3744 | 525 | areas_configured); |
e84cc647 | 526 | zlog_debug ("ospf_check_abr_status(): areas_act_attached: %d", |
718e3744 | 527 | areas_act_attached); |
528 | } | |
529 | ||
147193a2 | 530 | switch (ospf->abr_type) |
718e3744 | 531 | { |
532 | case OSPF_ABR_SHORTCUT: | |
533 | case OSPF_ABR_STAND: | |
534 | if (areas_act_attached > 1) | |
535 | SET_FLAG (new_flags, OSPF_FLAG_ABR); | |
536 | else | |
537 | UNSET_FLAG (new_flags, OSPF_FLAG_ABR); | |
538 | break; | |
539 | ||
540 | case OSPF_ABR_IBM: | |
541 | if ((areas_act_attached > 1) && bb_configured) | |
542 | SET_FLAG (new_flags, OSPF_FLAG_ABR); | |
543 | else | |
544 | UNSET_FLAG (new_flags, OSPF_FLAG_ABR); | |
545 | break; | |
546 | ||
547 | case OSPF_ABR_CISCO: | |
548 | if ((areas_configured > 1) && bb_act_attached) | |
549 | SET_FLAG (new_flags, OSPF_FLAG_ABR); | |
550 | else | |
551 | UNSET_FLAG (new_flags, OSPF_FLAG_ABR); | |
552 | break; | |
553 | default: | |
554 | break; | |
555 | } | |
556 | ||
147193a2 | 557 | if (new_flags != ospf->flags) |
718e3744 | 558 | { |
d3a9c768 | 559 | ospf_spf_calculate_schedule (ospf, SPF_FLAG_ABR_STATUS_CHANGE); |
718e3744 | 560 | if (IS_DEBUG_OSPF_EVENT) |
e84cc647 | 561 | zlog_debug ("ospf_check_abr_status(): new router flags: %x",new_flags); |
147193a2 | 562 | ospf->flags = new_flags; |
c363d386 | 563 | ospf_router_lsa_update (ospf); |
718e3744 | 564 | } |
565 | } | |
566 | ||
4dadc291 | 567 | static void |
718e3744 | 568 | ospf_abr_update_aggregate (struct ospf_area_range *range, |
b4154c14 | 569 | struct ospf_route *or, struct ospf_area *area) |
718e3744 | 570 | { |
571 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 572 | zlog_debug ("ospf_abr_update_aggregate(): Start"); |
718e3744 | 573 | |
b4154c14 JR |
574 | if (CHECK_FLAG (area->stub_router_state, OSPF_AREA_IS_STUB_ROUTED) && |
575 | (range->cost != OSPF_STUB_MAX_METRIC_SUMMARY_COST)) | |
576 | { | |
577 | range->cost = OSPF_STUB_MAX_METRIC_SUMMARY_COST; | |
578 | if (IS_DEBUG_OSPF_EVENT) | |
579 | zlog_debug ("ospf_abr_update_aggregate(): use summary max-metric 0x%08x", | |
580 | range->cost); | |
581 | } | |
582 | else if (range->cost_config != OSPF_AREA_RANGE_COST_UNSPEC) | |
718e3744 | 583 | { |
584 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 585 | zlog_debug ("ospf_abr_update_aggregate(): use configured cost %d", |
7f352b86 | 586 | range->cost_config); |
718e3744 | 587 | |
588 | range->cost = range->cost_config; | |
589 | } | |
590 | else | |
591 | { | |
592 | if (range->specifics == 0) | |
b4154c14 JR |
593 | { |
594 | if (IS_DEBUG_OSPF_EVENT) | |
595 | zlog_debug ("ospf_abr_update_aggregate(): use or->cost %d", | |
596 | or->cost); | |
597 | ||
598 | range->cost = or->cost; /* 1st time get 1st cost */ | |
599 | } | |
718e3744 | 600 | |
7f352b86 | 601 | if (or->cost > range->cost) |
602 | { | |
603 | if (IS_DEBUG_OSPF_EVENT) | |
b4154c14 | 604 | zlog_debug ("ospf_abr_update_aggregate(): update to %d", or->cost); |
718e3744 | 605 | |
7f352b86 | 606 | range->cost = or->cost; |
607 | } | |
718e3744 | 608 | } |
609 | ||
610 | range->specifics++; | |
611 | } | |
612 | ||
613 | static void | |
614 | set_metric (struct ospf_lsa *lsa, u_int32_t metric) | |
615 | { | |
616 | struct summary_lsa *header; | |
617 | u_char *mp; | |
618 | metric = htonl (metric); | |
c9e52be3 | 619 | mp = (u_char *) &metric; |
718e3744 | 620 | mp++; |
621 | header = (struct summary_lsa *) lsa->data; | |
622 | memcpy(header->metric, mp, 3); | |
623 | } | |
624 | ||
718e3744 | 625 | /* ospf_abr_translate_nssa */ |
4dadc291 | 626 | static int |
147193a2 | 627 | ospf_abr_translate_nssa (struct ospf_area *area, struct ospf_lsa *lsa) |
718e3744 | 628 | { |
629 | /* Incoming Type-7 or later aggregated Type-7 | |
d4a53d58 | 630 | * |
631 | * LSA is skipped if P-bit is off. | |
632 | * LSA is aggregated if within range. | |
633 | * | |
634 | * The Type-7 is translated, Installed/Approved as a Type-5 into | |
635 | * global LSDB, then Flooded through AS | |
636 | * | |
637 | * Later, any Unapproved Translated Type-5's are flushed/discarded | |
638 | */ | |
718e3744 | 639 | |
d4a53d58 | 640 | struct ospf_lsa *old = NULL, |
641 | *new = NULL; | |
642 | struct as_external_lsa *ext7; | |
643 | struct prefix_ipv4 p; | |
718e3744 | 644 | |
645 | if (! CHECK_FLAG (lsa->data->options, OSPF_OPTION_NP)) | |
646 | { | |
647 | if (IS_DEBUG_OSPF_NSSA) | |
e84cc647 | 648 | zlog_debug ("ospf_abr_translate_nssa(): LSA Id %s, P-bit off, NO Translation", |
d4a53d58 | 649 | inet_ntoa (lsa->data->id)); |
650 | return 1; | |
718e3744 | 651 | } |
d4a53d58 | 652 | |
718e3744 | 653 | if (IS_DEBUG_OSPF_NSSA) |
e84cc647 | 654 | zlog_debug ("ospf_abr_translate_nssa(): LSA Id %s, TRANSLATING 7 to 5", |
d4a53d58 | 655 | inet_ntoa (lsa->data->id)); |
718e3744 | 656 | |
d4a53d58 | 657 | ext7 = (struct as_external_lsa *)(lsa->data); |
658 | p.prefix = lsa->data->id; | |
659 | p.prefixlen = ip_masklen (ext7->mask); | |
660 | ||
661 | if (ext7->e[0].fwd_addr.s_addr == OSPF_DEFAULT_DESTINATION) | |
662 | { | |
663 | if (IS_DEBUG_OSPF_NSSA) | |
e84cc647 | 664 | zlog_debug ("ospf_abr_translate_nssa(): LSA Id %s, " |
d4a53d58 | 665 | "Forward address is 0, NO Translation", |
666 | inet_ntoa (lsa->data->id)); | |
667 | return 1; | |
668 | } | |
669 | ||
670 | /* try find existing AS-External LSA for this prefix */ | |
671 | ||
672 | old = ospf_external_info_find_lsa (area->ospf, &p); | |
673 | ||
674 | if (old) | |
675 | { | |
676 | if (IS_DEBUG_OSPF_NSSA) | |
e84cc647 | 677 | zlog_debug ("ospf_abr_translate_nssa(): " |
d4a53d58 | 678 | "found old translated LSA Id %s, refreshing", |
679 | inet_ntoa (old->data->id)); | |
680 | ||
681 | /* refresh */ | |
682 | new = ospf_translated_nssa_refresh (area->ospf, lsa, old); | |
683 | if (!new) | |
684 | { | |
685 | if (IS_DEBUG_OSPF_NSSA) | |
e84cc647 | 686 | zlog_debug ("ospf_abr_translate_nssa(): " |
d4a53d58 | 687 | "could not refresh translated LSA Id %s", |
688 | inet_ntoa (old->data->id)); | |
689 | } | |
690 | } | |
691 | else | |
692 | { | |
693 | /* no existing external route for this LSA Id | |
694 | * originate translated LSA | |
695 | */ | |
696 | ||
697 | if ((new = ospf_translated_nssa_originate (area->ospf, lsa)) | |
698 | == NULL) | |
699 | { | |
700 | if (IS_DEBUG_OSPF_NSSA) | |
e84cc647 | 701 | zlog_debug ("ospf_abr_translate_nssa(): Could not translate " |
d4a53d58 | 702 | "Type-7 for %s to Type-5", |
703 | inet_ntoa (lsa->data->id)); | |
a707247e | 704 | return 1; |
d4a53d58 | 705 | } |
706 | } | |
718e3744 | 707 | |
708 | /* Area where Aggregate testing will be inserted, just like summary | |
709 | advertisements */ | |
710 | /* ospf_abr_check_nssa_range (p_arg, lsa-> cost, lsa -> area); */ | |
711 | ||
718e3744 | 712 | return 0; |
713 | } | |
714 | ||
4dadc291 | 715 | static void |
718e3744 | 716 | ospf_abr_translate_nssa_range (struct prefix_ipv4 *p, u_int32_t cost) |
717 | { | |
718 | /* The Type-7 is created from the aggregated prefix and forwarded | |
719 | for lsa installation and flooding... to be added... */ | |
720 | } | |
718e3744 | 721 | |
ba682537 | 722 | void |
718e3744 | 723 | ospf_abr_announce_network_to_area (struct prefix_ipv4 *p, u_int32_t cost, |
724 | struct ospf_area *area) | |
725 | { | |
726 | struct ospf_lsa *lsa, *old = NULL; | |
727 | struct summary_lsa *sl = NULL; | |
b4154c14 | 728 | u_int32_t full_cost; |
718e3744 | 729 | |
730 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 731 | zlog_debug ("ospf_abr_announce_network_to_area(): Start"); |
718e3744 | 732 | |
b4154c14 JR |
733 | if (CHECK_FLAG (area->stub_router_state, OSPF_AREA_IS_STUB_ROUTED)) |
734 | full_cost = OSPF_STUB_MAX_METRIC_SUMMARY_COST; | |
735 | else | |
736 | full_cost = cost; | |
737 | ||
d4a53d58 | 738 | old = ospf_lsa_lookup_by_prefix (area->lsdb, OSPF_SUMMARY_LSA, |
739 | (struct prefix_ipv4 *) p, | |
740 | area->ospf->router_id); | |
718e3744 | 741 | if (old) |
742 | { | |
743 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 744 | zlog_debug ("ospf_abr_announce_network_to_area(): old summary found"); |
718e3744 | 745 | |
d4a53d58 | 746 | sl = (struct summary_lsa *) old->data; |
718e3744 | 747 | |
718e3744 | 748 | if (IS_DEBUG_OSPF_EVENT) |
e84cc647 | 749 | zlog_debug ("ospf_abr_announce_network_to_area(): " |
d4a53d58 | 750 | "old metric: %d, new metric: %d", |
751 | GET_METRIC (sl->metric), cost); | |
82175553 | 752 | |
b4154c14 | 753 | if ((GET_METRIC (sl->metric) == full_cost) && |
82175553 | 754 | ((old->flags & OSPF_LSA_IN_MAXAGE) == 0)) |
d4a53d58 | 755 | { |
756 | /* unchanged. simply reapprove it */ | |
757 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 758 | zlog_debug ("ospf_abr_announce_network_to_area(): " |
d4a53d58 | 759 | "old summary approved"); |
760 | SET_FLAG (old->flags, OSPF_LSA_APPROVED); | |
761 | } | |
762 | else | |
763 | { | |
764 | /* LSA is changed, refresh it */ | |
765 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 766 | zlog_debug ("ospf_abr_announce_network_to_area(): " |
d4a53d58 | 767 | "refreshing summary"); |
b4154c14 | 768 | set_metric (old, full_cost); |
c363d386 | 769 | lsa = ospf_lsa_refresh (area->ospf, old); |
c24d602e | 770 | |
771 | if (!lsa) | |
772 | { | |
4690c7d7 | 773 | char buf[PREFIX2STR_BUFFER]; |
c24d602e | 774 | |
775 | prefix2str ((struct prefix *) p, buf, sizeof(buf)); | |
776 | zlog_warn ("%s: Could not refresh %s to %s", | |
777 | __func__, | |
778 | buf, | |
779 | inet_ntoa (area->area_id)); | |
780 | return; | |
781 | } | |
782 | ||
c898775c | 783 | SET_FLAG (lsa->flags, OSPF_LSA_APPROVED); |
d4a53d58 | 784 | /* This will flood through area. */ |
785 | } | |
718e3744 | 786 | } |
787 | else | |
788 | { | |
789 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 790 | zlog_debug ("ospf_abr_announce_network_to_area(): " |
d4a53d58 | 791 | "creating new summary"); |
b4154c14 | 792 | lsa = ospf_summary_lsa_originate ( (struct prefix_ipv4 *)p, full_cost, area); |
d4a53d58 | 793 | /* This will flood through area. */ |
718e3744 | 794 | |
c24d602e | 795 | if (!lsa) |
796 | { | |
4690c7d7 | 797 | char buf[PREFIX2STR_BUFFER]; |
c24d602e | 798 | |
799 | prefix2str ((struct prefix *)p, buf, sizeof(buf)); | |
800 | zlog_warn ("%s: Could not originate %s to %s", | |
801 | __func__, | |
802 | buf, | |
803 | inet_ntoa (area->area_id)); | |
804 | return; | |
805 | } | |
806 | ||
718e3744 | 807 | SET_FLAG (lsa->flags, OSPF_LSA_APPROVED); |
808 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 809 | zlog_debug ("ospf_abr_announce_network_to_area(): " |
d4a53d58 | 810 | "flooding new version of summary"); |
718e3744 | 811 | } |
812 | ||
813 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 814 | zlog_debug ("ospf_abr_announce_network_to_area(): Stop"); |
718e3744 | 815 | } |
816 | ||
4dadc291 | 817 | static int |
718e3744 | 818 | ospf_abr_nexthops_belong_to_area (struct ospf_route *or, |
819 | struct ospf_area *area) | |
820 | { | |
1eb8ef25 | 821 | struct listnode *node, *nnode; |
96735eea | 822 | struct ospf_path *path; |
a8ba847f | 823 | struct ospf_interface *oi; |
718e3744 | 824 | |
a8ba847f JT |
825 | for (ALL_LIST_ELEMENTS_RO (or->paths, node, path)) |
826 | for (ALL_LIST_ELEMENTS_RO (area->oiflist, nnode, oi)) | |
827 | if (oi->ifp && oi->ifp->ifindex == path->ifindex) | |
828 | return 1; | |
718e3744 | 829 | |
830 | return 0; | |
831 | } | |
832 | ||
4dadc291 | 833 | static int |
d4a53d58 | 834 | ospf_abr_should_accept (struct prefix_ipv4 *p, struct ospf_area *area) |
718e3744 | 835 | { |
836 | if (IMPORT_NAME (area)) | |
837 | { | |
838 | if (IMPORT_LIST (area) == NULL) | |
839 | IMPORT_LIST (area) = access_list_lookup (AFI_IP, IMPORT_NAME (area)); | |
840 | ||
841 | if (IMPORT_LIST (area)) | |
842 | if (access_list_apply (IMPORT_LIST (area), p) == FILTER_DENY) | |
843 | return 0; | |
844 | } | |
845 | ||
846 | return 1; | |
847 | } | |
848 | ||
4dadc291 | 849 | static int |
718e3744 | 850 | ospf_abr_plist_in_check (struct ospf_area *area, struct ospf_route *or, |
d4a53d58 | 851 | struct prefix_ipv4 *p) |
718e3744 | 852 | { |
853 | if (PREFIX_NAME_IN (area)) | |
854 | { | |
855 | if (PREFIX_LIST_IN (area) == NULL) | |
856 | PREFIX_LIST_IN (area) = prefix_list_lookup (AFI_IP, | |
857 | PREFIX_NAME_IN (area)); | |
858 | if (PREFIX_LIST_IN (area)) | |
859 | if (prefix_list_apply (PREFIX_LIST_IN (area), p) != PREFIX_PERMIT) | |
860 | return 0; | |
861 | } | |
862 | return 1; | |
863 | } | |
864 | ||
4dadc291 | 865 | static int |
718e3744 | 866 | ospf_abr_plist_out_check (struct ospf_area *area, struct ospf_route *or, |
d4a53d58 | 867 | struct prefix_ipv4 *p) |
718e3744 | 868 | { |
869 | if (PREFIX_NAME_OUT (area)) | |
870 | { | |
871 | if (PREFIX_LIST_OUT (area) == NULL) | |
872 | PREFIX_LIST_OUT (area) = prefix_list_lookup (AFI_IP, | |
873 | PREFIX_NAME_OUT (area)); | |
874 | if (PREFIX_LIST_OUT (area)) | |
875 | if (prefix_list_apply (PREFIX_LIST_OUT (area), p) != PREFIX_PERMIT) | |
876 | return 0; | |
877 | } | |
878 | return 1; | |
879 | } | |
880 | ||
4dadc291 | 881 | static void |
147193a2 | 882 | ospf_abr_announce_network (struct ospf *ospf, |
d4a53d58 | 883 | struct prefix_ipv4 *p, struct ospf_route *or) |
718e3744 | 884 | { |
718e3744 | 885 | struct ospf_area_range *range; |
718e3744 | 886 | struct ospf_area *area, *or_area; |
52dc7ee6 | 887 | struct listnode *node; |
718e3744 | 888 | |
889 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 890 | zlog_debug ("ospf_abr_announce_network(): Start"); |
718e3744 | 891 | |
147193a2 | 892 | or_area = ospf_area_lookup_by_area_id (ospf, or->u.std.area_id); |
718e3744 | 893 | assert (or_area); |
894 | ||
1eb8ef25 | 895 | for (ALL_LIST_ELEMENTS_RO (ospf->areas, node, area)) |
718e3744 | 896 | { |
718e3744 | 897 | if (IS_DEBUG_OSPF_EVENT) |
e84cc647 | 898 | zlog_debug ("ospf_abr_announce_network(): looking at area %s", |
718e3744 | 899 | inet_ntoa (area->area_id)); |
900 | ||
901 | if (IPV4_ADDR_SAME (&or->u.std.area_id, &area->area_id)) | |
902 | continue; | |
903 | ||
904 | if (ospf_abr_nexthops_belong_to_area (or, area)) | |
905 | continue; | |
906 | ||
d4a53d58 | 907 | if (!ospf_abr_should_accept (p, area)) |
718e3744 | 908 | { |
909 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 910 | zlog_debug ("ospf_abr_announce_network(): " |
718e3744 | 911 | "prefix %s/%d was denied by import-list", |
912 | inet_ntoa (p->prefix), p->prefixlen); | |
913 | continue; | |
914 | } | |
915 | ||
d4a53d58 | 916 | if (!ospf_abr_plist_in_check (area, or, p)) |
718e3744 | 917 | { |
918 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 919 | zlog_debug ("ospf_abr_announce_network(): " |
718e3744 | 920 | "prefix %s/%d was denied by prefix-list", |
921 | inet_ntoa (p->prefix), p->prefixlen); | |
922 | continue; | |
923 | } | |
924 | ||
925 | if (area->external_routing != OSPF_AREA_DEFAULT && area->no_summary) | |
926 | { | |
927 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 928 | zlog_debug ("ospf_abr_announce_network(): " |
718e3744 | 929 | "area %s is stub and no_summary", |
930 | inet_ntoa (area->area_id)); | |
931 | continue; | |
932 | } | |
933 | ||
934 | if (or->path_type == OSPF_PATH_INTER_AREA) | |
935 | { | |
936 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 937 | zlog_debug ("ospf_abr_announce_network(): this is " |
718e3744 | 938 | "inter-area route to %s/%d", |
939 | inet_ntoa (p->prefix), p->prefixlen); | |
940 | ||
941 | if (!OSPF_IS_AREA_BACKBONE (area)) | |
942 | ospf_abr_announce_network_to_area (p, or->cost, area); | |
943 | } | |
944 | ||
945 | if (or->path_type == OSPF_PATH_INTRA_AREA) | |
d4a53d58 | 946 | { |
947 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 948 | zlog_debug ("ospf_abr_announce_network(): " |
d4a53d58 | 949 | "this is intra-area route to %s/%d", |
950 | inet_ntoa (p->prefix), p->prefixlen); | |
a707247e DS |
951 | if ((range = ospf_area_range_match (or_area, p)) |
952 | && !ospf_area_is_transit (area)) | |
953 | ospf_abr_update_aggregate (range, or, area); | |
954 | else | |
955 | ospf_abr_announce_network_to_area (p, or->cost, area); | |
d4a53d58 | 956 | } |
718e3744 | 957 | } |
958 | } | |
959 | ||
4dadc291 | 960 | static int |
147193a2 | 961 | ospf_abr_should_announce (struct ospf *ospf, |
d4a53d58 | 962 | struct prefix_ipv4 *p, struct ospf_route *or) |
718e3744 | 963 | { |
147193a2 | 964 | struct ospf_area *area; |
965 | ||
966 | area = ospf_area_lookup_by_area_id (ospf, or->u.std.area_id); | |
718e3744 | 967 | |
968 | assert (area); | |
969 | ||
970 | if (EXPORT_NAME (area)) | |
971 | { | |
972 | if (EXPORT_LIST (area) == NULL) | |
973 | EXPORT_LIST (area) = access_list_lookup (AFI_IP, EXPORT_NAME (area)); | |
974 | ||
975 | if (EXPORT_LIST (area)) | |
976 | if (access_list_apply (EXPORT_LIST (area), p) == FILTER_DENY) | |
977 | return 0; | |
978 | } | |
979 | ||
980 | return 1; | |
981 | } | |
982 | ||
4dadc291 | 983 | static void |
147193a2 | 984 | ospf_abr_process_nssa_translates (struct ospf *ospf) |
718e3744 | 985 | { |
986 | /* Scan through all NSSA_LSDB records for all areas; | |
987 | ||
988 | If P-bit is on, translate all Type-7's to 5's and aggregate or | |
989 | flood install as approved in Type-5 LSDB with XLATE Flag on | |
990 | later, do same for all aggregates... At end, DISCARD all | |
991 | remaining UNAPPROVED Type-5's (Aggregate is for future ) */ | |
52dc7ee6 | 992 | struct listnode *node; |
718e3744 | 993 | struct ospf_area *area; |
147193a2 | 994 | struct route_node *rn; |
995 | struct ospf_lsa *lsa; | |
718e3744 | 996 | |
997 | if (IS_DEBUG_OSPF_NSSA) | |
e84cc647 | 998 | zlog_debug ("ospf_abr_process_nssa_translates(): Start"); |
718e3744 | 999 | |
1eb8ef25 | 1000 | for (ALL_LIST_ELEMENTS_RO (ospf->areas, node, area)) |
718e3744 | 1001 | { |
e2c6c153 | 1002 | if (! area->NSSATranslatorState) |
d4a53d58 | 1003 | continue; /* skip if not translator */ |
718e3744 | 1004 | |
1005 | if (area->external_routing != OSPF_AREA_NSSA) | |
d4a53d58 | 1006 | continue; /* skip if not Nssa Area */ |
718e3744 | 1007 | |
1008 | if (IS_DEBUG_OSPF_NSSA) | |
e84cc647 | 1009 | zlog_debug ("ospf_abr_process_nssa_translates(): " |
d4a53d58 | 1010 | "looking at area %s", inet_ntoa (area->area_id)); |
718e3744 | 1011 | |
147193a2 | 1012 | LSDB_LOOP (NSSA_LSDB (area), rn, lsa) |
d4a53d58 | 1013 | ospf_abr_translate_nssa (area, lsa); |
718e3744 | 1014 | } |
1015 | ||
1016 | if (IS_DEBUG_OSPF_NSSA) | |
e84cc647 | 1017 | zlog_debug ("ospf_abr_process_nssa_translates(): Stop"); |
718e3744 | 1018 | |
1019 | } | |
718e3744 | 1020 | |
4dadc291 | 1021 | static void |
147193a2 | 1022 | ospf_abr_process_network_rt (struct ospf *ospf, |
1023 | struct route_table *rt) | |
718e3744 | 1024 | { |
718e3744 | 1025 | struct ospf_area *area; |
147193a2 | 1026 | struct ospf_route *or; |
1027 | struct route_node *rn; | |
718e3744 | 1028 | |
1029 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1030 | zlog_debug ("ospf_abr_process_network_rt(): Start"); |
718e3744 | 1031 | |
1032 | for (rn = route_top (rt); rn; rn = route_next (rn)) | |
1033 | { | |
1034 | if ((or = rn->info) == NULL) | |
1035 | continue; | |
1036 | ||
147193a2 | 1037 | if (!(area = ospf_area_lookup_by_area_id (ospf, or->u.std.area_id))) |
718e3744 | 1038 | { |
1039 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1040 | zlog_debug ("ospf_abr_process_network_rt(): area %s no longer exists", |
718e3744 | 1041 | inet_ntoa (or->u.std.area_id)); |
1042 | continue; | |
1043 | } | |
1044 | ||
1045 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1046 | zlog_debug ("ospf_abr_process_network_rt(): this is a route to %s/%d", |
718e3744 | 1047 | inet_ntoa (rn->p.u.prefix4), rn->p.prefixlen); |
1048 | if (or->path_type >= OSPF_PATH_TYPE1_EXTERNAL) | |
1049 | { | |
1050 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1051 | zlog_debug ("ospf_abr_process_network_rt(): " |
718e3744 | 1052 | "this is an External router, skipping"); |
1053 | continue; | |
1054 | } | |
1055 | ||
1056 | if (or->cost >= OSPF_LS_INFINITY) | |
1057 | { | |
1058 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1059 | zlog_debug ("ospf_abr_process_network_rt():" |
718e3744 | 1060 | " this route's cost is infinity, skipping"); |
1061 | continue; | |
1062 | } | |
1063 | ||
1064 | if (or->type == OSPF_DESTINATION_DISCARD) | |
1065 | { | |
1066 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1067 | zlog_debug ("ospf_abr_process_network_rt():" |
718e3744 | 1068 | " this is a discard entry, skipping"); |
1069 | continue; | |
1070 | } | |
1071 | ||
1072 | if (or->path_type == OSPF_PATH_INTRA_AREA && | |
d4a53d58 | 1073 | !ospf_abr_should_announce (ospf, (struct prefix_ipv4 *) &rn->p, or)) |
718e3744 | 1074 | { |
1075 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1076 | zlog_debug("ospf_abr_process_network_rt(): denied by export-list"); |
718e3744 | 1077 | continue; |
1078 | } | |
1079 | ||
1080 | if (or->path_type == OSPF_PATH_INTRA_AREA && | |
d4a53d58 | 1081 | !ospf_abr_plist_out_check (area, or, (struct prefix_ipv4 *) &rn->p)) |
718e3744 | 1082 | { |
1083 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1084 | zlog_debug("ospf_abr_process_network_rt(): denied by prefix-list"); |
718e3744 | 1085 | continue; |
1086 | } | |
1087 | ||
1088 | if ((or->path_type == OSPF_PATH_INTER_AREA) && | |
1089 | !OSPF_IS_AREA_ID_BACKBONE (or->u.std.area_id)) | |
1090 | { | |
1091 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1092 | zlog_debug ("ospf_abr_process_network_rt():" |
718e3744 | 1093 | " this is route is not backbone one, skipping"); |
1094 | continue; | |
1095 | } | |
1096 | ||
1097 | ||
147193a2 | 1098 | if ((ospf->abr_type == OSPF_ABR_CISCO) || |
1099 | (ospf->abr_type == OSPF_ABR_IBM)) | |
718e3744 | 1100 | |
147193a2 | 1101 | if (!ospf_act_bb_connection (ospf) && |
718e3744 | 1102 | or->path_type != OSPF_PATH_INTRA_AREA) |
1103 | { | |
1104 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1105 | zlog_debug ("ospf_abr_process_network_rt(): ALT ABR: " |
718e3744 | 1106 | "No BB connection, skip not intra-area routes"); |
1107 | continue; | |
1108 | } | |
1109 | ||
1110 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1111 | zlog_debug ("ospf_abr_process_network_rt(): announcing"); |
fa2b17e3 | 1112 | ospf_abr_announce_network (ospf, (struct prefix_ipv4 *)&rn->p, or); |
718e3744 | 1113 | } |
1114 | ||
1115 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1116 | zlog_debug ("ospf_abr_process_network_rt(): Stop"); |
718e3744 | 1117 | } |
1118 | ||
4dadc291 | 1119 | static void |
718e3744 | 1120 | ospf_abr_announce_rtr_to_area (struct prefix_ipv4 *p, u_int32_t cost, |
1121 | struct ospf_area *area) | |
1122 | { | |
1123 | struct ospf_lsa *lsa, *old = NULL; | |
1124 | struct summary_lsa *slsa = NULL; | |
1125 | ||
1126 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1127 | zlog_debug ("ospf_abr_announce_rtr_to_area(): Start"); |
718e3744 | 1128 | |
147193a2 | 1129 | old = ospf_lsa_lookup_by_prefix (area->lsdb, OSPF_ASBR_SUMMARY_LSA, |
1130 | p, area->ospf->router_id); | |
718e3744 | 1131 | if (old) |
1132 | { | |
1133 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1134 | zlog_debug ("ospf_abr_announce_rtr_to_area(): old summary found"); |
718e3744 | 1135 | slsa = (struct summary_lsa *) old->data; |
1136 | ||
1137 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1138 | zlog_debug ("ospf_abr_announce_network_to_area(): " |
718e3744 | 1139 | "old metric: %d, new metric: %d", |
1140 | GET_METRIC (slsa->metric), cost); | |
1141 | } | |
1142 | ||
d265548f VK |
1143 | if (old && (GET_METRIC (slsa->metric) == cost) && |
1144 | ((old->flags & OSPF_LSA_IN_MAXAGE) == 0)) | |
718e3744 | 1145 | { |
1146 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1147 | zlog_debug ("ospf_abr_announce_rtr_to_area(): old summary approved"); |
718e3744 | 1148 | SET_FLAG (old->flags, OSPF_LSA_APPROVED); |
1149 | } | |
1150 | else | |
1151 | { | |
1152 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1153 | zlog_debug ("ospf_abr_announce_rtr_to_area(): 2.2"); |
718e3744 | 1154 | |
1155 | if (old) | |
1156 | { | |
1157 | set_metric (old, cost); | |
c363d386 | 1158 | lsa = ospf_lsa_refresh (area->ospf, old); |
718e3744 | 1159 | } |
1160 | else | |
1161 | lsa = ospf_summary_asbr_lsa_originate (p, cost, area); | |
c24d602e | 1162 | if (!lsa) |
1163 | { | |
4690c7d7 | 1164 | char buf[PREFIX2STR_BUFFER]; |
c24d602e | 1165 | |
1166 | prefix2str ((struct prefix *)p, buf, sizeof(buf)); | |
1167 | zlog_warn ("%s: Could not refresh/originate %s to %s", | |
1168 | __func__, | |
1169 | buf, | |
1170 | inet_ntoa (area->area_id)); | |
1171 | return; | |
1172 | } | |
1173 | ||
718e3744 | 1174 | if (IS_DEBUG_OSPF_EVENT) |
e84cc647 | 1175 | zlog_debug ("ospf_abr_announce_rtr_to_area(): " |
718e3744 | 1176 | "flooding new version of summary"); |
c24d602e | 1177 | |
718e3744 | 1178 | /* |
1179 | zlog_info ("ospf_abr_announce_rtr_to_area(): creating new summary"); | |
1180 | lsa = ospf_summary_asbr_lsa (p, cost, area, old); */ | |
1181 | ||
1182 | SET_FLAG (lsa->flags, OSPF_LSA_APPROVED); | |
1183 | /* ospf_flood_through_area (area, NULL, lsa);*/ | |
1184 | } | |
1185 | ||
1186 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1187 | zlog_debug ("ospf_abr_announce_rtr_to_area(): Stop"); |
718e3744 | 1188 | } |
1189 | ||
1190 | ||
4dadc291 | 1191 | static void |
147193a2 | 1192 | ospf_abr_announce_rtr (struct ospf *ospf, |
1193 | struct prefix_ipv4 *p, struct ospf_route *or) | |
718e3744 | 1194 | { |
52dc7ee6 | 1195 | struct listnode *node; |
718e3744 | 1196 | struct ospf_area *area; |
1197 | ||
1198 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1199 | zlog_debug ("ospf_abr_announce_rtr(): Start"); |
718e3744 | 1200 | |
1eb8ef25 | 1201 | for (ALL_LIST_ELEMENTS_RO (ospf->areas, node, area)) |
718e3744 | 1202 | { |
718e3744 | 1203 | if (IS_DEBUG_OSPF_EVENT) |
e84cc647 | 1204 | zlog_debug ("ospf_abr_announce_rtr(): looking at area %s", |
718e3744 | 1205 | inet_ntoa (area->area_id)); |
1206 | ||
1207 | if (IPV4_ADDR_SAME (&or->u.std.area_id, &area->area_id)) | |
1208 | continue; | |
1209 | ||
1210 | if (ospf_abr_nexthops_belong_to_area (or, area)) | |
1211 | continue; | |
1212 | ||
1213 | if (area->external_routing != OSPF_AREA_DEFAULT) | |
1214 | { | |
1215 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1216 | zlog_debug ("ospf_abr_announce_rtr(): " |
718e3744 | 1217 | "area %s doesn't support external routing", |
1218 | inet_ntoa(area->area_id)); | |
1219 | continue; | |
1220 | } | |
1221 | ||
1222 | if (or->path_type == OSPF_PATH_INTER_AREA) | |
1223 | { | |
1224 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1225 | zlog_debug ("ospf_abr_announce_rtr(): " |
718e3744 | 1226 | "this is inter-area route to %s", inet_ntoa (p->prefix)); |
1227 | if (!OSPF_IS_AREA_BACKBONE (area)) | |
1228 | ospf_abr_announce_rtr_to_area (p, or->cost, area); | |
1229 | } | |
1230 | ||
1231 | if (or->path_type == OSPF_PATH_INTRA_AREA) | |
1232 | { | |
1233 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1234 | zlog_debug ("ospf_abr_announce_rtr(): " |
718e3744 | 1235 | "this is intra-area route to %s", inet_ntoa (p->prefix)); |
1236 | ospf_abr_announce_rtr_to_area (p, or->cost, area); | |
1237 | } | |
1238 | } | |
1239 | ||
1240 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1241 | zlog_debug ("ospf_abr_announce_rtr(): Stop"); |
718e3744 | 1242 | } |
1243 | ||
4dadc291 | 1244 | static void |
147193a2 | 1245 | ospf_abr_process_router_rt (struct ospf *ospf, struct route_table *rt) |
718e3744 | 1246 | { |
718e3744 | 1247 | struct ospf_route *or; |
147193a2 | 1248 | struct route_node *rn; |
718e3744 | 1249 | struct list *l; |
1250 | ||
1251 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1252 | zlog_debug ("ospf_abr_process_router_rt(): Start"); |
718e3744 | 1253 | |
1254 | for (rn = route_top (rt); rn; rn = route_next (rn)) | |
1255 | { | |
1eb8ef25 | 1256 | struct listnode *node, *nnode; |
718e3744 | 1257 | char flag = 0; |
1258 | struct ospf_route *best = NULL; | |
1259 | ||
1260 | if (rn->info == NULL) | |
1261 | continue; | |
1262 | ||
1263 | l = rn->info; | |
1264 | ||
1265 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1266 | zlog_debug ("ospf_abr_process_router_rt(): this is a route to %s", |
718e3744 | 1267 | inet_ntoa (rn->p.u.prefix4)); |
1268 | ||
1eb8ef25 | 1269 | for (ALL_LIST_ELEMENTS (l, node, nnode, or)) |
718e3744 | 1270 | { |
147193a2 | 1271 | if (!ospf_area_lookup_by_area_id (ospf, or->u.std.area_id)) |
718e3744 | 1272 | { |
1273 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1274 | zlog_debug ("ospf_abr_process_router_rt(): area %s no longer exists", |
718e3744 | 1275 | inet_ntoa (or->u.std.area_id)); |
1276 | continue; | |
1277 | } | |
1278 | ||
1279 | ||
1280 | if (!CHECK_FLAG (or->u.std.flags, ROUTER_LSA_EXTERNAL)) | |
1281 | { | |
1282 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1283 | zlog_debug ("ospf_abr_process_router_rt(): " |
718e3744 | 1284 | "This is not an ASBR, skipping"); |
1285 | continue; | |
1286 | } | |
1287 | ||
1288 | if (!flag) | |
1289 | { | |
147193a2 | 1290 | best = ospf_find_asbr_route (ospf, rt, |
1291 | (struct prefix_ipv4 *) &rn->p); | |
718e3744 | 1292 | flag = 1; |
1293 | } | |
1294 | ||
1295 | if (best == NULL) | |
1296 | continue; | |
1297 | ||
1298 | if (or != best) | |
1299 | { | |
1300 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1301 | zlog_debug ("ospf_abr_process_router_rt(): " |
718e3744 | 1302 | "This route is not the best among possible, skipping"); |
1303 | continue; | |
1304 | } | |
1305 | ||
1306 | if (or->path_type == OSPF_PATH_INTER_AREA && | |
1307 | !OSPF_IS_AREA_ID_BACKBONE (or->u.std.area_id)) | |
1308 | { | |
1309 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1310 | zlog_debug ("ospf_abr_process_router_rt(): " |
718e3744 | 1311 | "This route is not a backbone one, skipping"); |
1312 | continue; | |
1313 | } | |
1314 | ||
1315 | if (or->cost >= OSPF_LS_INFINITY) | |
1316 | { | |
1317 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1318 | zlog_debug ("ospf_abr_process_router_rt(): " |
718e3744 | 1319 | "This route has LS_INFINITY metric, skipping"); |
1320 | continue; | |
1321 | } | |
1322 | ||
147193a2 | 1323 | if (ospf->abr_type == OSPF_ABR_CISCO |
1324 | || ospf->abr_type == OSPF_ABR_IBM) | |
1325 | if (!ospf_act_bb_connection (ospf) | |
1326 | && or->path_type != OSPF_PATH_INTRA_AREA) | |
718e3744 | 1327 | { |
1328 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1329 | zlog_debug("ospf_abr_process_network_rt(): ALT ABR: " |
718e3744 | 1330 | "No BB connection, skip not intra-area routes"); |
1331 | continue; | |
1332 | } | |
1333 | ||
147193a2 | 1334 | ospf_abr_announce_rtr (ospf, (struct prefix_ipv4 *) &rn->p, or); |
718e3744 | 1335 | |
1336 | } | |
1337 | ||
1338 | } | |
1339 | ||
1340 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1341 | zlog_debug ("ospf_abr_process_router_rt(): Stop"); |
718e3744 | 1342 | } |
1343 | ||
4dadc291 | 1344 | static void |
147193a2 | 1345 | ospf_abr_unapprove_translates (struct ospf *ospf) /* For NSSA Translations */ |
718e3744 | 1346 | { |
147193a2 | 1347 | struct ospf_lsa *lsa; |
1348 | struct route_node *rn; | |
1349 | ||
718e3744 | 1350 | if (IS_DEBUG_OSPF_NSSA) |
e84cc647 | 1351 | zlog_debug ("ospf_abr_unapprove_translates(): Start"); |
718e3744 | 1352 | |
1353 | /* NSSA Translator is not checked, because it may have gone away, | |
1354 | and we would want to flush any residuals anyway */ | |
1355 | ||
147193a2 | 1356 | LSDB_LOOP (EXTERNAL_LSDB (ospf), rn, lsa) |
1357 | if (CHECK_FLAG (lsa->flags, OSPF_LSA_LOCAL_XLT)) | |
d4a53d58 | 1358 | { |
1359 | UNSET_FLAG (lsa->flags, OSPF_LSA_APPROVED); | |
1360 | if (IS_DEBUG_OSPF_NSSA) | |
e84cc647 | 1361 | zlog_debug ("ospf_abr_unapprove_translates(): " |
d4a53d58 | 1362 | "approved unset on link id %s", |
1363 | inet_ntoa (lsa->data->id)); | |
1364 | } | |
718e3744 | 1365 | |
1366 | if (IS_DEBUG_OSPF_NSSA) | |
e84cc647 | 1367 | zlog_debug ("ospf_abr_unapprove_translates(): Stop"); |
718e3744 | 1368 | } |
718e3744 | 1369 | |
4dadc291 | 1370 | static void |
147193a2 | 1371 | ospf_abr_unapprove_summaries (struct ospf *ospf) |
718e3744 | 1372 | { |
52dc7ee6 | 1373 | struct listnode *node; |
718e3744 | 1374 | struct ospf_area *area; |
147193a2 | 1375 | struct route_node *rn; |
1376 | struct ospf_lsa *lsa; | |
718e3744 | 1377 | |
1378 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1379 | zlog_debug ("ospf_abr_unapprove_summaries(): Start"); |
718e3744 | 1380 | |
1eb8ef25 | 1381 | for (ALL_LIST_ELEMENTS_RO (ospf->areas, node, area)) |
718e3744 | 1382 | { |
d4a53d58 | 1383 | if (IS_DEBUG_OSPF_EVENT) |
e84cc647 | 1384 | zlog_debug ("ospf_abr_unapprove_summaries(): " |
d4a53d58 | 1385 | "considering area %s", |
1386 | inet_ntoa (area->area_id)); | |
147193a2 | 1387 | LSDB_LOOP (SUMMARY_LSDB (area), rn, lsa) |
d4a53d58 | 1388 | if (ospf_lsa_is_self_originated (ospf, lsa)) |
1389 | { | |
1390 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1391 | zlog_debug ("ospf_abr_unapprove_summaries(): " |
d4a53d58 | 1392 | "approved unset on summary link id %s", |
1393 | inet_ntoa (lsa->data->id)); | |
1394 | UNSET_FLAG (lsa->flags, OSPF_LSA_APPROVED); | |
1395 | } | |
147193a2 | 1396 | |
1397 | LSDB_LOOP (ASBR_SUMMARY_LSDB (area), rn, lsa) | |
d4a53d58 | 1398 | if (ospf_lsa_is_self_originated (ospf, lsa)) |
1399 | { | |
1400 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1401 | zlog_debug ("ospf_abr_unapprove_summaries(): " |
d4a53d58 | 1402 | "approved unset on asbr-summary link id %s", |
1403 | inet_ntoa (lsa->data->id)); | |
1404 | UNSET_FLAG (lsa->flags, OSPF_LSA_APPROVED); | |
1405 | } | |
718e3744 | 1406 | } |
1407 | ||
1408 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1409 | zlog_debug ("ospf_abr_unapprove_summaries(): Stop"); |
718e3744 | 1410 | } |
1411 | ||
4dadc291 | 1412 | static void |
147193a2 | 1413 | ospf_abr_prepare_aggregates (struct ospf *ospf) |
718e3744 | 1414 | { |
52dc7ee6 | 1415 | struct listnode *node; |
718e3744 | 1416 | struct route_node *rn; |
1417 | struct ospf_area_range *range; | |
1eb8ef25 | 1418 | struct ospf_area *area; |
718e3744 | 1419 | |
1420 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1421 | zlog_debug ("ospf_abr_prepare_aggregates(): Start"); |
718e3744 | 1422 | |
1eb8ef25 | 1423 | for (ALL_LIST_ELEMENTS_RO (ospf->areas, node, area)) |
718e3744 | 1424 | { |
718e3744 | 1425 | for (rn = route_top (area->ranges); rn; rn = route_next (rn)) |
1426 | if ((range = rn->info) != NULL) | |
1427 | { | |
1428 | range->cost = 0; | |
1429 | range->specifics = 0; | |
1430 | } | |
1431 | } | |
1432 | ||
1433 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1434 | zlog_debug ("ospf_abr_prepare_aggregates(): Stop"); |
718e3744 | 1435 | } |
1436 | ||
4dadc291 | 1437 | static void |
147193a2 | 1438 | ospf_abr_announce_aggregates (struct ospf *ospf) |
718e3744 | 1439 | { |
1440 | struct ospf_area *area, *ar; | |
1441 | struct ospf_area_range *range; | |
1442 | struct route_node *rn; | |
d4a53d58 | 1443 | struct prefix p; |
52dc7ee6 | 1444 | struct listnode *node, *n; |
718e3744 | 1445 | |
1446 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1447 | zlog_debug ("ospf_abr_announce_aggregates(): Start"); |
718e3744 | 1448 | |
1eb8ef25 | 1449 | for (ALL_LIST_ELEMENTS_RO (ospf->areas, node, area)) |
718e3744 | 1450 | { |
718e3744 | 1451 | if (IS_DEBUG_OSPF_EVENT) |
e84cc647 | 1452 | zlog_debug ("ospf_abr_announce_aggregates(): looking at area %s", |
718e3744 | 1453 | inet_ntoa (area->area_id)); |
1454 | ||
1455 | for (rn = route_top (area->ranges); rn; rn = route_next (rn)) | |
1456 | if ((range = rn->info)) | |
1457 | { | |
1458 | if (!CHECK_FLAG (range->flags, OSPF_AREA_RANGE_ADVERTISE)) | |
1459 | { | |
1460 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1461 | zlog_debug ("ospf_abr_announce_aggregates():" |
718e3744 | 1462 | " discarding suppress-ranges"); |
1463 | continue; | |
1464 | } | |
1465 | ||
1466 | p.family = AF_INET; | |
d4a53d58 | 1467 | p.u.prefix4 = range->addr; |
718e3744 | 1468 | p.prefixlen = range->masklen; |
1469 | ||
1470 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1471 | zlog_debug ("ospf_abr_announce_aggregates():" |
718e3744 | 1472 | " this is range: %s/%d", |
d4a53d58 | 1473 | inet_ntoa (p.u.prefix4), p.prefixlen); |
718e3744 | 1474 | |
1475 | if (CHECK_FLAG (range->flags, OSPF_AREA_RANGE_SUBSTITUTE)) | |
1476 | { | |
1477 | p.family = AF_INET; | |
d4a53d58 | 1478 | p.u.prefix4 = range->subst_addr; |
718e3744 | 1479 | p.prefixlen = range->subst_masklen; |
1480 | } | |
1481 | ||
1482 | if (range->specifics) | |
1483 | { | |
1484 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1485 | zlog_debug ("ospf_abr_announce_aggregates(): active range"); |
718e3744 | 1486 | |
1eb8ef25 | 1487 | for (ALL_LIST_ELEMENTS_RO (ospf->areas, n, ar)) |
718e3744 | 1488 | { |
718e3744 | 1489 | if (ar == area) |
1490 | continue; | |
1491 | ||
1492 | /* We do not check nexthops here, because | |
1493 | intra-area routes can be associated with | |
1494 | one area only */ | |
1495 | ||
1496 | /* backbone routes are not summarized | |
1497 | when announced into transit areas */ | |
1498 | ||
1499 | if (ospf_area_is_transit (ar) && | |
1500 | OSPF_IS_AREA_BACKBONE (area)) | |
1501 | { | |
1502 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1503 | zlog_debug ("ospf_abr_announce_aggregates(): Skipping " |
718e3744 | 1504 | "announcement of BB aggregate into" |
1505 | " a transit area"); | |
1506 | continue; | |
1507 | } | |
fa2b17e3 | 1508 | ospf_abr_announce_network_to_area ((struct prefix_ipv4 *)&p, range->cost, ar); |
718e3744 | 1509 | } |
1510 | } | |
1511 | } | |
1512 | } | |
1513 | ||
1514 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1515 | zlog_debug ("ospf_abr_announce_aggregates(): Stop"); |
718e3744 | 1516 | } |
1517 | ||
4dadc291 | 1518 | static void |
147193a2 | 1519 | ospf_abr_send_nssa_aggregates (struct ospf *ospf) /* temporarily turned off */ |
718e3744 | 1520 | { |
52dc7ee6 | 1521 | struct listnode *node; /*, n; */ |
718e3744 | 1522 | struct ospf_area *area; /*, *ar; */ |
1523 | struct route_node *rn; | |
1524 | struct ospf_area_range *range; | |
1525 | struct prefix_ipv4 p; | |
1526 | ||
1527 | if (IS_DEBUG_OSPF_NSSA) | |
e84cc647 | 1528 | zlog_debug ("ospf_abr_send_nssa_aggregates(): Start"); |
718e3744 | 1529 | |
1eb8ef25 | 1530 | for (ALL_LIST_ELEMENTS_RO (ospf->areas, node, area)) |
718e3744 | 1531 | { |
e2c6c153 | 1532 | if (! area->NSSATranslatorState) |
718e3744 | 1533 | continue; |
1534 | ||
1535 | if (IS_DEBUG_OSPF_NSSA) | |
e84cc647 | 1536 | zlog_debug ("ospf_abr_send_nssa_aggregates(): looking at area %s", |
718e3744 | 1537 | inet_ntoa (area->area_id)); |
1538 | ||
1539 | for (rn = route_top (area->ranges); rn; rn = route_next (rn)) | |
1540 | { | |
1541 | if (rn->info == NULL) | |
1542 | continue; | |
1543 | ||
1544 | range = rn->info; | |
1545 | ||
1546 | if (!CHECK_FLAG (range->flags, OSPF_AREA_RANGE_ADVERTISE)) | |
1547 | { | |
1548 | if (IS_DEBUG_OSPF_NSSA) | |
e84cc647 | 1549 | zlog_debug ("ospf_abr_send_nssa_aggregates():" |
718e3744 | 1550 | " discarding suppress-ranges"); |
1551 | continue; | |
1552 | } | |
1553 | ||
1554 | p.family = AF_INET; | |
1555 | p.prefix = range->addr; | |
1556 | p.prefixlen = range->masklen; | |
1557 | ||
1558 | if (IS_DEBUG_OSPF_NSSA) | |
e84cc647 | 1559 | zlog_debug ("ospf_abr_send_nssa_aggregates():" |
718e3744 | 1560 | " this is range: %s/%d", |
1561 | inet_ntoa (p.prefix), p.prefixlen); | |
1562 | ||
1563 | if (CHECK_FLAG (range->flags, OSPF_AREA_RANGE_SUBSTITUTE)) | |
1564 | { | |
1565 | p.family = AF_INET; | |
1566 | p.prefix = range->subst_addr; | |
1567 | p.prefixlen = range->subst_masklen; | |
1568 | } | |
1569 | ||
1570 | if (range->specifics) | |
e2c6c153 | 1571 | { |
1572 | if (IS_DEBUG_OSPF_NSSA) | |
e84cc647 | 1573 | zlog_debug ("ospf_abr_send_nssa_aggregates(): active range"); |
e2c6c153 | 1574 | |
1575 | /* Fetch LSA-Type-7 from aggregate prefix, and then | |
1576 | * translate, Install (as Type-5), Approve, and Flood | |
1577 | */ | |
1578 | ospf_abr_translate_nssa_range (&p, range->cost); | |
1579 | } | |
1580 | } /* all area ranges*/ | |
718e3744 | 1581 | } /* all areas */ |
1582 | ||
1583 | if (IS_DEBUG_OSPF_NSSA) | |
e84cc647 | 1584 | zlog_debug ("ospf_abr_send_nssa_aggregates(): Stop"); |
718e3744 | 1585 | } |
1586 | ||
4dadc291 | 1587 | static void |
147193a2 | 1588 | ospf_abr_announce_stub_defaults (struct ospf *ospf) |
718e3744 | 1589 | { |
52dc7ee6 | 1590 | struct listnode *node; |
718e3744 | 1591 | struct ospf_area *area; |
1592 | struct prefix_ipv4 p; | |
1593 | ||
147193a2 | 1594 | if (! IS_OSPF_ABR (ospf)) |
718e3744 | 1595 | return; |
1596 | ||
1597 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1598 | zlog_debug ("ospf_abr_announce_stub_defaults(): Start"); |
718e3744 | 1599 | |
1600 | p.family = AF_INET; | |
1601 | p.prefix.s_addr = OSPF_DEFAULT_DESTINATION; | |
1602 | p.prefixlen = 0; | |
1603 | ||
1eb8ef25 | 1604 | for (ALL_LIST_ELEMENTS_RO (ospf->areas, node, area)) |
718e3744 | 1605 | { |
718e3744 | 1606 | if (IS_DEBUG_OSPF_EVENT) |
e84cc647 | 1607 | zlog_debug ("ospf_abr_announce_stub_defaults(): looking at area %s", |
1608 | inet_ntoa (area->area_id)); | |
718e3744 | 1609 | |
d4a53d58 | 1610 | if ( (area->external_routing != OSPF_AREA_STUB) |
d4a53d58 | 1611 | && (area->external_routing != OSPF_AREA_NSSA) |
d4a53d58 | 1612 | ) |
1613 | continue; | |
718e3744 | 1614 | |
1615 | if (OSPF_IS_AREA_BACKBONE (area)) | |
d4a53d58 | 1616 | continue; /* Sanity Check */ |
1617 | ||
718e3744 | 1618 | if (IS_DEBUG_OSPF_EVENT) |
e84cc647 | 1619 | zlog_debug ("ospf_abr_announce_stub_defaults(): " |
1620 | "announcing 0.0.0.0/0 to area %s", | |
d4a53d58 | 1621 | inet_ntoa (area->area_id)); |
718e3744 | 1622 | ospf_abr_announce_network_to_area (&p, area->default_cost, area); |
1623 | } | |
1624 | ||
1625 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1626 | zlog_debug ("ospf_abr_announce_stub_defaults(): Stop"); |
718e3744 | 1627 | } |
1628 | ||
4dadc291 | 1629 | static int |
147193a2 | 1630 | ospf_abr_remove_unapproved_translates_apply (struct ospf *ospf, |
1631 | struct ospf_lsa *lsa) | |
718e3744 | 1632 | { |
1633 | if (CHECK_FLAG (lsa->flags, OSPF_LSA_LOCAL_XLT) | |
1634 | && ! CHECK_FLAG (lsa->flags, OSPF_LSA_APPROVED)) | |
1635 | { | |
1636 | zlog_info ("ospf_abr_remove_unapproved_translates(): " | |
1637 | "removing unapproved translates, ID: %s", | |
1638 | inet_ntoa (lsa->data->id)); | |
1639 | ||
1640 | /* FLUSH THROUGHOUT AS */ | |
147193a2 | 1641 | ospf_lsa_flush_as (ospf, lsa); |
718e3744 | 1642 | |
1643 | /* DISCARD from LSDB */ | |
1644 | } | |
1645 | return 0; | |
1646 | } | |
1647 | ||
4dadc291 | 1648 | static void |
147193a2 | 1649 | ospf_abr_remove_unapproved_translates (struct ospf *ospf) |
718e3744 | 1650 | { |
147193a2 | 1651 | struct route_node *rn; |
1652 | struct ospf_lsa *lsa; | |
1653 | ||
718e3744 | 1654 | /* All AREA PROCESS should have APPROVED necessary LSAs */ |
1655 | /* Remove any left over and not APPROVED */ | |
1656 | if (IS_DEBUG_OSPF_NSSA) | |
e84cc647 | 1657 | zlog_debug ("ospf_abr_remove_unapproved_translates(): Start"); |
718e3744 | 1658 | |
147193a2 | 1659 | LSDB_LOOP (EXTERNAL_LSDB (ospf), rn, lsa) |
1660 | ospf_abr_remove_unapproved_translates_apply (ospf, lsa); | |
718e3744 | 1661 | |
1662 | if (IS_DEBUG_OSPF_NSSA) | |
e84cc647 | 1663 | zlog_debug ("ospf_abr_remove_unapproved_translates(): Stop"); |
718e3744 | 1664 | } |
718e3744 | 1665 | |
4dadc291 | 1666 | static void |
147193a2 | 1667 | ospf_abr_remove_unapproved_summaries (struct ospf *ospf) |
718e3744 | 1668 | { |
52dc7ee6 | 1669 | struct listnode *node; |
718e3744 | 1670 | struct ospf_area *area; |
147193a2 | 1671 | struct route_node *rn; |
1672 | struct ospf_lsa *lsa; | |
718e3744 | 1673 | |
1674 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1675 | zlog_debug ("ospf_abr_remove_unapproved_summaries(): Start"); |
718e3744 | 1676 | |
1eb8ef25 | 1677 | for (ALL_LIST_ELEMENTS_RO (ospf->areas, node, area)) |
718e3744 | 1678 | { |
718e3744 | 1679 | if (IS_DEBUG_OSPF_EVENT) |
e84cc647 | 1680 | zlog_debug ("ospf_abr_remove_unapproved_summaries(): " |
718e3744 | 1681 | "looking at area %s", inet_ntoa (area->area_id)); |
1682 | ||
147193a2 | 1683 | LSDB_LOOP (SUMMARY_LSDB (area), rn, lsa) |
1684 | if (ospf_lsa_is_self_originated (ospf, lsa)) | |
1685 | if (!CHECK_FLAG (lsa->flags, OSPF_LSA_APPROVED)) | |
1686 | ospf_lsa_flush_area (lsa, area); | |
1687 | ||
1688 | LSDB_LOOP (ASBR_SUMMARY_LSDB (area), rn, lsa) | |
1689 | if (ospf_lsa_is_self_originated (ospf, lsa)) | |
1690 | if (!CHECK_FLAG (lsa->flags, OSPF_LSA_APPROVED)) | |
1691 | ospf_lsa_flush_area (lsa, area); | |
718e3744 | 1692 | } |
1693 | ||
1694 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1695 | zlog_debug ("ospf_abr_remove_unapproved_summaries(): Stop"); |
718e3744 | 1696 | } |
1697 | ||
4dadc291 | 1698 | static void |
147193a2 | 1699 | ospf_abr_manage_discard_routes (struct ospf *ospf) |
718e3744 | 1700 | { |
1eb8ef25 | 1701 | struct listnode *node, *nnode; |
718e3744 | 1702 | struct route_node *rn; |
1703 | struct ospf_area *area; | |
1704 | struct ospf_area_range *range; | |
1705 | ||
1eb8ef25 | 1706 | for (ALL_LIST_ELEMENTS (ospf->areas, node, nnode, area)) |
1707 | for (rn = route_top (area->ranges); rn; rn = route_next (rn)) | |
1708 | if ((range = rn->info) != NULL) | |
1709 | if (CHECK_FLAG (range->flags, OSPF_AREA_RANGE_ADVERTISE)) | |
1710 | { | |
1711 | if (range->specifics) | |
1712 | ospf_add_discard_route (ospf->new_table, area, | |
1713 | (struct prefix_ipv4 *) &rn->p); | |
1714 | else | |
8fc9e007 JR |
1715 | ospf_delete_discard_route (ospf->new_table, |
1716 | (struct prefix_ipv4 *) &rn->p); | |
1eb8ef25 | 1717 | } |
718e3744 | 1718 | } |
1719 | ||
718e3744 | 1720 | /* This is the function taking care about ABR NSSA, i.e. NSSA |
1721 | Translator, -LSA aggregation and flooding. For all NSSAs | |
1722 | ||
1723 | Any SELF-AS-LSA is in the Type-5 LSDB and Type-7 LSDB. These LSA's | |
1724 | are refreshed from the Type-5 LSDB, installed into the Type-7 LSDB | |
1725 | with the P-bit set. | |
1726 | ||
1727 | Any received Type-5s are legal for an ABR, else illegal for IR. | |
1728 | Received Type-7s are installed, by area, with incoming P-bit. They | |
1729 | are flooded; if the Elected NSSA Translator, then P-bit off. | |
1730 | ||
1731 | Additionally, this ABR will place "translated type-7's" into the | |
1732 | Type-5 LSDB in order to keep track of APPROVAL or not. | |
1733 | ||
1734 | It will scan through every area, looking for Type-7 LSAs with P-Bit | |
1735 | SET. The Type-7's are either AS-FLOODED & 5-INSTALLED or | |
1736 | AGGREGATED. Later, the AGGREGATED LSAs are AS-FLOODED & | |
1737 | 5-INSTALLED. | |
1738 | ||
1739 | 5-INSTALLED is into the Type-5 LSDB; Any UNAPPROVED Type-5 LSAs | |
1740 | left over are FLUSHED and DISCARDED. | |
1741 | ||
1742 | For External Calculations, any NSSA areas use the Type-7 AREA-LSDB, | |
1743 | any ABR-non-NSSA areas use the Type-5 GLOBAL-LSDB. */ | |
1744 | ||
4dadc291 | 1745 | static void |
147193a2 | 1746 | ospf_abr_nssa_task (struct ospf *ospf) /* called only if any_nssa */ |
718e3744 | 1747 | { |
1748 | if (IS_DEBUG_OSPF_NSSA) | |
e84cc647 | 1749 | zlog_debug ("Check for NSSA-ABR Tasks():"); |
718e3744 | 1750 | |
147193a2 | 1751 | if (! IS_OSPF_ABR (ospf)) |
718e3744 | 1752 | return; |
1753 | ||
147193a2 | 1754 | if (! ospf->anyNSSA) |
718e3744 | 1755 | return; |
1756 | ||
1757 | /* Each area must confirm TranslatorRole */ | |
1758 | if (IS_DEBUG_OSPF_NSSA) | |
e84cc647 | 1759 | zlog_debug ("ospf_abr_nssa_task(): Start"); |
718e3744 | 1760 | |
1761 | /* For all Global Entries flagged "local-translate", unset APPROVED */ | |
1762 | if (IS_DEBUG_OSPF_NSSA) | |
e84cc647 | 1763 | zlog_debug ("ospf_abr_nssa_task(): unapprove translates"); |
718e3744 | 1764 | |
147193a2 | 1765 | ospf_abr_unapprove_translates (ospf); |
718e3744 | 1766 | |
1767 | /* RESET all Ranges in every Area, same as summaries */ | |
1768 | if (IS_DEBUG_OSPF_NSSA) | |
e84cc647 | 1769 | zlog_debug ("ospf_abr_nssa_task(): NSSA initialize aggregates"); |
e2c6c153 | 1770 | ospf_abr_prepare_aggregates (ospf); /*TURNED OFF just for now */ |
718e3744 | 1771 | |
1772 | /* For all NSSAs, Type-7s, translate to 5's, INSTALL/FLOOD, or | |
e2c6c153 | 1773 | * Aggregate as Type-7 |
1774 | * Install or Approve in Type-5 Global LSDB | |
1775 | */ | |
718e3744 | 1776 | if (IS_DEBUG_OSPF_NSSA) |
e84cc647 | 1777 | zlog_debug ("ospf_abr_nssa_task(): process translates"); |
147193a2 | 1778 | ospf_abr_process_nssa_translates (ospf); |
718e3744 | 1779 | |
1780 | /* Translate/Send any "ranged" aggregates, and also 5-Install and | |
e2c6c153 | 1781 | * Approve |
1782 | * Scan Type-7's for aggregates, translate to Type-5's, | |
1783 | * Install/Flood/Approve | |
1784 | */ | |
718e3744 | 1785 | if (IS_DEBUG_OSPF_NSSA) |
e84cc647 | 1786 | zlog_debug("ospf_abr_nssa_task(): send NSSA aggregates"); |
e2c6c153 | 1787 | ospf_abr_send_nssa_aggregates (ospf); /*TURNED OFF FOR NOW */ |
718e3744 | 1788 | |
d4a53d58 | 1789 | /* Send any NSSA defaults as Type-5 |
1790 | *if (IS_DEBUG_OSPF_NSSA) | |
e84cc647 | 1791 | * zlog_debug ("ospf_abr_nssa_task(): announce nssa defaults"); |
d4a53d58 | 1792 | *ospf_abr_announce_nssa_defaults (ospf); |
1793 | * havnt a clue what above is supposed to do. | |
1794 | */ | |
718e3744 | 1795 | |
1796 | /* Flush any unapproved previous translates from Global Data Base */ | |
1797 | if (IS_DEBUG_OSPF_NSSA) | |
e84cc647 | 1798 | zlog_debug ("ospf_abr_nssa_task(): remove unapproved translates"); |
147193a2 | 1799 | ospf_abr_remove_unapproved_translates (ospf); |
718e3744 | 1800 | |
147193a2 | 1801 | ospf_abr_manage_discard_routes (ospf); /* same as normal...discard */ |
718e3744 | 1802 | |
1803 | if (IS_DEBUG_OSPF_NSSA) | |
e84cc647 | 1804 | zlog_debug ("ospf_abr_nssa_task(): Stop"); |
718e3744 | 1805 | } |
718e3744 | 1806 | |
1807 | /* This is the function taking care about ABR stuff, i.e. | |
1808 | summary-LSA origination and flooding. */ | |
1809 | void | |
147193a2 | 1810 | ospf_abr_task (struct ospf *ospf) |
718e3744 | 1811 | { |
1812 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1813 | zlog_debug ("ospf_abr_task(): Start"); |
718e3744 | 1814 | |
147193a2 | 1815 | if (ospf->new_table == NULL || ospf->new_rtrs == NULL) |
718e3744 | 1816 | { |
1817 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1818 | zlog_debug ("ospf_abr_task(): Routing tables are not yet ready"); |
718e3744 | 1819 | return; |
1820 | } | |
1821 | ||
1822 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1823 | zlog_debug ("ospf_abr_task(): unapprove summaries"); |
147193a2 | 1824 | ospf_abr_unapprove_summaries (ospf); |
718e3744 | 1825 | |
1826 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1827 | zlog_debug ("ospf_abr_task(): prepare aggregates"); |
147193a2 | 1828 | ospf_abr_prepare_aggregates (ospf); |
718e3744 | 1829 | |
147193a2 | 1830 | if (IS_OSPF_ABR (ospf)) |
718e3744 | 1831 | { |
1832 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1833 | zlog_debug ("ospf_abr_task(): process network RT"); |
147193a2 | 1834 | ospf_abr_process_network_rt (ospf, ospf->new_table); |
718e3744 | 1835 | |
1836 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1837 | zlog_debug ("ospf_abr_task(): process router RT"); |
147193a2 | 1838 | ospf_abr_process_router_rt (ospf, ospf->new_rtrs); |
718e3744 | 1839 | |
1840 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1841 | zlog_debug ("ospf_abr_task(): announce aggregates"); |
147193a2 | 1842 | ospf_abr_announce_aggregates (ospf); |
718e3744 | 1843 | |
1844 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1845 | zlog_debug ("ospf_abr_task(): announce stub defaults"); |
147193a2 | 1846 | ospf_abr_announce_stub_defaults (ospf); |
718e3744 | 1847 | } |
1848 | ||
1849 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1850 | zlog_debug ("ospf_abr_task(): remove unapproved summaries"); |
147193a2 | 1851 | ospf_abr_remove_unapproved_summaries (ospf); |
718e3744 | 1852 | |
147193a2 | 1853 | ospf_abr_manage_discard_routes (ospf); |
718e3744 | 1854 | |
718e3744 | 1855 | if (IS_DEBUG_OSPF_EVENT) |
e84cc647 | 1856 | zlog_debug ("ospf_abr_task(): Stop"); |
718e3744 | 1857 | } |
1858 | ||
4dadc291 | 1859 | static int |
147193a2 | 1860 | ospf_abr_task_timer (struct thread *thread) |
718e3744 | 1861 | { |
147193a2 | 1862 | struct ospf *ospf = THREAD_ARG (thread); |
1863 | ||
1864 | ospf->t_abr_task = 0; | |
718e3744 | 1865 | |
1866 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1867 | zlog_debug ("Running ABR task on timer"); |
718e3744 | 1868 | |
147193a2 | 1869 | ospf_check_abr_status (ospf); |
d4a53d58 | 1870 | ospf_abr_nssa_check_status (ospf); |
718e3744 | 1871 | |
147193a2 | 1872 | ospf_abr_task (ospf); |
e2c6c153 | 1873 | ospf_abr_nssa_task (ospf); /* if nssa-abr, then scan Type-7 LSDB */ |
718e3744 | 1874 | |
147193a2 | 1875 | return 0; |
718e3744 | 1876 | } |
1877 | ||
1878 | void | |
147193a2 | 1879 | ospf_schedule_abr_task (struct ospf *ospf) |
718e3744 | 1880 | { |
1881 | if (IS_DEBUG_OSPF_EVENT) | |
e84cc647 | 1882 | zlog_debug ("Scheduling ABR task"); |
147193a2 | 1883 | |
ffa2c898 QY |
1884 | thread_add_timer(master, ospf_abr_task_timer, ospf, OSPF_ABR_TASK_DELAY, |
1885 | &ospf->t_abr_task); | |
718e3744 | 1886 | } |