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718e3744 | 1 | /* |
2 | * OSPF Flooding -- RFC2328 Section 13. | |
3 | * Copyright (C) 1999, 2000 Toshiaki Takada | |
4 | * | |
5 | * This file is part of GNU Zebra. | |
896014f4 | 6 | * |
718e3744 | 7 | * GNU Zebra is free software; you can redistribute it and/or modify |
8 | * it under the terms of the GNU General Public License as published | |
9 | * by the Free Software Foundation; either version 2, or (at your | |
10 | * option) any later version. | |
11 | * | |
12 | * GNU Zebra is distributed in the hope that it will be useful, but | |
13 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * General Public License for more details. | |
16 | * | |
896014f4 DL |
17 | * You should have received a copy of the GNU General Public License along |
18 | * with this program; see the file COPYING; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
718e3744 | 20 | */ |
21 | ||
22 | #include <zebra.h> | |
23 | ||
cbf3e3eb | 24 | #include "monotime.h" |
718e3744 | 25 | #include "linklist.h" |
26 | #include "prefix.h" | |
27 | #include "if.h" | |
28 | #include "command.h" | |
29 | #include "table.h" | |
30 | #include "thread.h" | |
31 | #include "memory.h" | |
32 | #include "log.h" | |
33 | #include "zclient.h" | |
34 | ||
35 | #include "ospfd/ospfd.h" | |
36 | #include "ospfd/ospf_interface.h" | |
37 | #include "ospfd/ospf_ism.h" | |
38 | #include "ospfd/ospf_asbr.h" | |
39 | #include "ospfd/ospf_lsa.h" | |
40 | #include "ospfd/ospf_lsdb.h" | |
41 | #include "ospfd/ospf_neighbor.h" | |
42 | #include "ospfd/ospf_nsm.h" | |
43 | #include "ospfd/ospf_spf.h" | |
44 | #include "ospfd/ospf_flood.h" | |
45 | #include "ospfd/ospf_packet.h" | |
46 | #include "ospfd/ospf_abr.h" | |
47 | #include "ospfd/ospf_route.h" | |
48 | #include "ospfd/ospf_zebra.h" | |
49 | #include "ospfd/ospf_dump.h" | |
50 | ||
51 | extern struct zclient *zclient; | |
6b0655a2 | 52 | |
718e3744 | 53 | /* Do the LSA acking specified in table 19, Section 13.5, row 2 |
d62a17ae | 54 | * This get called from ospf_flood_out_interface. Declared inline |
718e3744 | 55 | * for speed. */ |
d62a17ae | 56 | static void ospf_flood_delayed_lsa_ack(struct ospf_neighbor *inbr, |
57 | struct ospf_lsa *lsa) | |
718e3744 | 58 | { |
d62a17ae | 59 | /* LSA is more recent than database copy, but was not |
60 | flooded back out receiving interface. Delayed | |
61 | acknowledgment sent. If interface is in Backup state | |
62 | delayed acknowledgment sent only if advertisement | |
63 | received from Designated Router, otherwise do nothing See | |
64 | RFC 2328 Section 13.5 */ | |
65 | ||
66 | /* Whether LSA is more recent or not, and whether this is in | |
67 | response to the LSA being sent out recieving interface has been | |
68 | worked out previously */ | |
69 | ||
70 | /* Deal with router as BDR */ | |
71 | if (inbr->oi->state == ISM_Backup && !NBR_IS_DR(inbr)) | |
72 | return; | |
73 | ||
74 | /* Schedule a delayed LSA Ack to be sent */ | |
75 | listnode_add(inbr->oi->ls_ack, | |
76 | ospf_lsa_lock(lsa)); /* delayed LSA Ack */ | |
718e3744 | 77 | } |
78 | ||
79 | /* Check LSA is related to external info. */ | |
b5a8894d CS |
80 | struct external_info *ospf_external_info_check(struct ospf *ospf, |
81 | struct ospf_lsa *lsa) | |
718e3744 | 82 | { |
d62a17ae | 83 | struct as_external_lsa *al; |
84 | struct prefix_ipv4 p; | |
85 | struct route_node *rn; | |
5af13f54 DL |
86 | struct list *ext_list; |
87 | struct listnode *node; | |
88 | struct ospf_external *ext; | |
d62a17ae | 89 | int type; |
90 | ||
91 | al = (struct as_external_lsa *)lsa->data; | |
92 | ||
93 | p.family = AF_INET; | |
94 | p.prefix = lsa->data->id; | |
95 | p.prefixlen = ip_masklen(al->mask); | |
96 | ||
fd9a1d5a | 97 | for (type = 0; type < ZEBRA_ROUTE_MAX; type++) { |
d62a17ae | 98 | int redist_on = 0; |
99 | ||
100 | redist_on = | |
1fe59b44 | 101 | is_default_prefix4(&p) |
49db7a7b | 102 | ? vrf_bitmap_check( |
1fe59b44 RZ |
103 | zclient->default_information[AFI_IP], |
104 | ospf->vrf_id) | |
d62a17ae | 105 | : (zclient->mi_redist[AFI_IP][type].enabled |
106 | || vrf_bitmap_check( | |
1fe59b44 RZ |
107 | zclient->redist[AFI_IP][type], |
108 | ospf->vrf_id)); | |
d62a17ae | 109 | // Pending: check for MI above. |
110 | if (redist_on) { | |
de1ac5fd | 111 | ext_list = ospf->external[type]; |
d62a17ae | 112 | if (!ext_list) |
113 | continue; | |
114 | ||
115 | for (ALL_LIST_ELEMENTS_RO(ext_list, node, ext)) { | |
116 | rn = NULL; | |
117 | if (ext->external_info) | |
118 | rn = route_node_lookup( | |
119 | ext->external_info, | |
120 | (struct prefix *)&p); | |
121 | if (rn) { | |
122 | route_unlock_node(rn); | |
123 | if (rn->info != NULL) | |
124 | return (struct external_info *) | |
125 | rn->info; | |
126 | } | |
127 | } | |
128 | } | |
129 | } | |
130 | ||
1fe59b44 | 131 | if (is_default_prefix4(&p) && ospf->external[DEFAULT_ROUTE]) { |
5af13f54 DL |
132 | ext_list = ospf->external[DEFAULT_ROUTE]; |
133 | ||
134 | for (ALL_LIST_ELEMENTS_RO(ext_list, node, ext)) { | |
135 | if (!ext->external_info) | |
136 | continue; | |
137 | ||
138 | rn = route_node_lookup(ext->external_info, | |
139 | (struct prefix *)&p); | |
140 | if (!rn) | |
141 | continue; | |
142 | route_unlock_node(rn); | |
143 | if (rn->info != NULL) | |
144 | return (struct external_info *)rn->info; | |
145 | } | |
146 | } | |
d62a17ae | 147 | return NULL; |
718e3744 | 148 | } |
149 | ||
d62a17ae | 150 | static void ospf_process_self_originated_lsa(struct ospf *ospf, |
151 | struct ospf_lsa *new, | |
152 | struct ospf_area *area) | |
718e3744 | 153 | { |
d62a17ae | 154 | struct ospf_interface *oi; |
155 | struct external_info *ei; | |
156 | struct listnode *node; | |
960417cf | 157 | struct as_external_lsa *al; |
158 | struct prefix_ipv4 p; | |
159 | struct ospf_external_aggr_rt *aggr; | |
d62a17ae | 160 | |
161 | if (IS_DEBUG_OSPF_EVENT) | |
162 | zlog_debug( | |
96b663a3 | 163 | "%s:LSA[Type%d:%pI4]: Process self-originated LSA seq 0x%x", |
868a0861 | 164 | ospf_get_name(ospf), new->data->type, |
96b663a3 | 165 | &new->data->id, ntohl(new->data->ls_seqnum)); |
d62a17ae | 166 | |
167 | /* If we're here, we installed a self-originated LSA that we received | |
168 | from a neighbor, i.e. it's more recent. We must see whether we want | |
169 | to originate it. | |
170 | If yes, we should use this LSA's sequence number and reoriginate | |
171 | a new instance. | |
172 | if not --- we must flush this LSA from the domain. */ | |
173 | switch (new->data->type) { | |
174 | case OSPF_ROUTER_LSA: | |
175 | /* Originate a new instance and schedule flooding */ | |
176 | if (area->router_lsa_self) | |
177 | area->router_lsa_self->data->ls_seqnum = | |
178 | new->data->ls_seqnum; | |
179 | ospf_router_lsa_update_area(area); | |
180 | return; | |
181 | case OSPF_NETWORK_LSA: | |
182 | case OSPF_OPAQUE_LINK_LSA: | |
183 | /* We must find the interface the LSA could belong to. | |
184 | If the interface is no more a broadcast type or we are no | |
185 | more | |
186 | the DR, we flush the LSA otherwise -- create the new instance | |
187 | and | |
188 | schedule flooding. */ | |
189 | ||
190 | /* Look through all interfaces, not just area, since interface | |
191 | could be moved from one area to another. */ | |
192 | for (ALL_LIST_ELEMENTS_RO(ospf->oiflist, node, oi)) | |
193 | /* These are sanity check. */ | |
194 | if (IPV4_ADDR_SAME(&oi->address->u.prefix4, | |
195 | &new->data->id)) { | |
196 | if (oi->area != area | |
197 | || oi->type != OSPF_IFTYPE_BROADCAST | |
198 | || !IPV4_ADDR_SAME(&oi->address->u.prefix4, | |
199 | &DR(oi))) { | |
200 | ospf_schedule_lsa_flush_area(area, new); | |
201 | return; | |
202 | } | |
203 | ||
204 | if (new->data->type == OSPF_OPAQUE_LINK_LSA) { | |
205 | ospf_opaque_lsa_refresh(new); | |
206 | return; | |
207 | } | |
208 | ||
209 | if (oi->network_lsa_self) | |
210 | oi->network_lsa_self->data->ls_seqnum = | |
211 | new->data->ls_seqnum; | |
212 | /* Schedule network-LSA origination. */ | |
213 | ospf_network_lsa_update(oi); | |
214 | return; | |
215 | } | |
216 | break; | |
217 | case OSPF_SUMMARY_LSA: | |
218 | case OSPF_ASBR_SUMMARY_LSA: | |
219 | ospf_schedule_abr_task(ospf); | |
220 | break; | |
221 | case OSPF_AS_EXTERNAL_LSA: | |
222 | case OSPF_AS_NSSA_LSA: | |
223 | if ((new->data->type == OSPF_AS_EXTERNAL_LSA) | |
224 | && CHECK_FLAG(new->flags, OSPF_LSA_LOCAL_XLT)) { | |
225 | ospf_translated_nssa_refresh(ospf, NULL, new); | |
226 | return; | |
227 | } | |
960417cf | 228 | |
229 | al = (struct as_external_lsa *)new->data; | |
230 | p.family = AF_INET; | |
231 | p.prefixlen = ip_masklen(al->mask); | |
232 | p.prefix = new->data->id; | |
233 | ||
b5a8894d | 234 | ei = ospf_external_info_check(ospf, new); |
960417cf | 235 | if (ei) { |
236 | if (ospf_external_aggr_match(ospf, &ei->p)) { | |
237 | if (IS_DEBUG_OSPF(lsa, EXTNL_LSA_AGGR)) | |
238 | zlog_debug( | |
239 | "%s, Matching external aggregate route found for %pI4, so don't refresh it.", | |
240 | __func__, | |
241 | &ei->p.prefix); | |
242 | ||
243 | /* Aggregated external route shouldn't | |
244 | * be in LSDB. | |
245 | */ | |
246 | if (!IS_LSA_MAXAGE(new)) | |
247 | ospf_lsa_flush_as(ospf, new); | |
248 | ||
249 | return; | |
250 | } | |
251 | ||
d62a17ae | 252 | ospf_external_lsa_refresh(ospf, new, ei, |
63f0e941 | 253 | LSA_REFRESH_FORCE, false); |
960417cf | 254 | } else { |
255 | aggr = (struct ospf_external_aggr_rt *) | |
256 | ospf_extrenal_aggregator_lookup(ospf, &p); | |
257 | if (aggr) { | |
258 | struct external_info ei_aggr; | |
259 | ||
260 | memset(&ei_aggr, 0, | |
261 | sizeof(struct external_info)); | |
262 | ei_aggr.p = aggr->p; | |
263 | ei_aggr.tag = aggr->tag; | |
264 | ei_aggr.instance = ospf->instance; | |
265 | ei_aggr.route_map_set.metric = -1; | |
266 | ei_aggr.route_map_set.metric_type = -1; | |
267 | ||
268 | ospf_external_lsa_refresh(ospf, new, &ei_aggr, | |
269 | LSA_REFRESH_FORCE, true); | |
d2e84005 MR |
270 | SET_FLAG(aggr->flags, |
271 | OSPF_EXTERNAL_AGGRT_ORIGINATED); | |
960417cf | 272 | } else |
273 | ospf_lsa_flush_as(ospf, new); | |
274 | } | |
d62a17ae | 275 | break; |
276 | case OSPF_OPAQUE_AREA_LSA: | |
277 | ospf_opaque_lsa_refresh(new); | |
278 | break; | |
279 | case OSPF_OPAQUE_AS_LSA: | |
280 | ospf_opaque_lsa_refresh(new); | |
996c9314 | 281 | /* Reconsideration may needed. */ /* XXX */ |
d62a17ae | 282 | break; |
283 | default: | |
284 | break; | |
285 | } | |
718e3744 | 286 | } |
287 | ||
288 | /* OSPF LSA flooding -- RFC2328 Section 13.(5). */ | |
289 | ||
290 | /* Now Updated for NSSA operation, as follows: | |
291 | ||
292 | ||
293 | Type-5's have no change. Blocked to STUB or NSSA. | |
294 | ||
295 | Type-7's can be received, and if a DR | |
296 | they will also flood the local NSSA Area as Type-7's | |
297 | ||
d62a17ae | 298 | If a Self-Originated LSA (now an ASBR), |
718e3744 | 299 | The LSDB will be updated as Type-5's, (for continual re-fresh) |
300 | ||
301 | If an NSSA-IR it is installed/flooded as Type-7, P-bit on. | |
302 | if an NSSA-ABR it is installed/flooded as Type-7, P-bit off. | |
303 | ||
304 | Later, during the ABR TASK, if the ABR is the Elected NSSA | |
305 | translator, then All Type-7s (with P-bit ON) are Translated to | |
306 | Type-5's and flooded to all non-NSSA/STUB areas. | |
307 | ||
d62a17ae | 308 | During ASE Calculations, |
718e3744 | 309 | non-ABRs calculate external routes from Type-7's |
310 | ABRs calculate external routes from Type-5's and non-self Type-7s | |
311 | */ | |
d62a17ae | 312 | int ospf_flood(struct ospf *ospf, struct ospf_neighbor *nbr, |
313 | struct ospf_lsa *current, struct ospf_lsa *new) | |
718e3744 | 314 | { |
d62a17ae | 315 | struct ospf_interface *oi; |
316 | int lsa_ack_flag; | |
317 | ||
318 | /* Type-7 LSA's will be flooded throughout their native NSSA area, | |
319 | but will also be flooded as Type-5's into ABR capable links. */ | |
320 | ||
321 | if (IS_DEBUG_OSPF_EVENT) | |
322 | zlog_debug( | |
96b663a3 MS |
323 | "%s:LSA[Flooding]: start, NBR %pI4 (%s), cur(%p), New-LSA[%s]", |
324 | ospf_get_name(ospf), &nbr->router_id, | |
d62a17ae | 325 | lookup_msg(ospf_nsm_state_msg, nbr->state, NULL), |
326 | (void *)current, dump_lsa_key(new)); | |
327 | ||
328 | oi = nbr->oi; | |
329 | ||
330 | /* If there is already a database copy, and if the | |
331 | database copy was received via flooding and installed less | |
332 | than MinLSArrival seconds ago, discard the new LSA | |
333 | (without acknowledging it). */ | |
334 | if (current != NULL) /* -- endo. */ | |
335 | { | |
336 | if (IS_LSA_SELF(current) | |
337 | && (ntohs(current->data->ls_age) == 0 | |
338 | && ntohl(current->data->ls_seqnum) | |
339 | == OSPF_INITIAL_SEQUENCE_NUMBER)) { | |
340 | if (IS_DEBUG_OSPF_EVENT) | |
341 | zlog_debug( | |
868a0861 DS |
342 | "%s:LSA[Flooding]: Got a self-originated LSA, while local one is initial instance.", |
343 | ospf_get_name(ospf)); | |
d62a17ae | 344 | ; /* Accept this LSA for quick LSDB resynchronization. |
9d303b37 | 345 | */ |
d62a17ae | 346 | } else if (monotime_since(¤t->tv_recv, NULL) |
347 | < ospf->min_ls_arrival * 1000LL) { | |
348 | if (IS_DEBUG_OSPF_EVENT) | |
349 | zlog_debug( | |
868a0861 DS |
350 | "%s:LSA[Flooding]: LSA is received recently.", |
351 | ospf_get_name(ospf)); | |
d62a17ae | 352 | return -1; |
353 | } | |
354 | } | |
355 | ||
356 | /* Flood the new LSA out some subset of the router's interfaces. | |
357 | In some cases (e.g., the state of the receiving interface is | |
358 | DR and the LSA was received from a router other than the | |
359 | Backup DR) the LSA will be flooded back out the receiving | |
360 | interface. */ | |
361 | lsa_ack_flag = ospf_flood_through(ospf, nbr, new); | |
362 | ||
363 | /* Remove the current database copy from all neighbors' Link state | |
364 | retransmission lists. AS_EXTERNAL and AS_EXTERNAL_OPAQUE does | |
365 | ^^^^^^^^^^^^^^^^^^^^^^^ | |
366 | not have area ID. | |
367 | All other (even NSSA's) do have area ID. */ | |
368 | if (current) { | |
369 | switch (current->data->type) { | |
370 | case OSPF_AS_EXTERNAL_LSA: | |
371 | case OSPF_OPAQUE_AS_LSA: | |
372 | ospf_ls_retransmit_delete_nbr_as(ospf, current); | |
373 | break; | |
374 | default: | |
45559c4d | 375 | ospf_ls_retransmit_delete_nbr_area(oi->area, current); |
d62a17ae | 376 | break; |
377 | } | |
378 | } | |
379 | ||
380 | /* Do some internal house keeping that is needed here */ | |
381 | SET_FLAG(new->flags, OSPF_LSA_RECEIVED); | |
752ee70b | 382 | (void)ospf_lsa_is_self_originated(ospf, new); /* Let it set the flag */ |
d62a17ae | 383 | |
10514170 RW |
384 | /* Received non-self-originated Grace LSA */ |
385 | if (IS_GRACE_LSA(new) && !IS_LSA_SELF(new)) { | |
ad686992 | 386 | |
387 | if (IS_LSA_MAXAGE(new)) { | |
388 | ||
389 | /* Handling Max age grace LSA.*/ | |
3f87e1d8 | 390 | if (IS_DEBUG_OSPF_GR) |
ad686992 | 391 | zlog_debug( |
96b663a3 | 392 | "%s, Received a maxage GRACE-LSA from router %pI4", |
a4544597 | 393 | __func__, &new->data->adv_router); |
ad686992 | 394 | |
395 | if (current) { | |
396 | ospf_process_maxage_grace_lsa(ospf, new, nbr); | |
397 | } else { | |
3f87e1d8 | 398 | if (IS_DEBUG_OSPF_GR) |
ad686992 | 399 | zlog_debug( |
400 | "%s, Grace LSA doesn't exist in lsdb, so discarding grace lsa", | |
a4544597 | 401 | __func__); |
ad686992 | 402 | return -1; |
403 | } | |
404 | } else { | |
3f87e1d8 | 405 | if (IS_DEBUG_OSPF_GR) |
ad686992 | 406 | zlog_debug( |
96b663a3 | 407 | "%s, Received a GRACE-LSA from router %pI4", |
a4544597 | 408 | __func__, &new->data->adv_router); |
ad686992 | 409 | |
410 | if (ospf_process_grace_lsa(ospf, new, nbr) | |
411 | == OSPF_GR_NOT_HELPER) { | |
3f87e1d8 | 412 | if (IS_DEBUG_OSPF_GR) |
ad686992 | 413 | zlog_debug( |
414 | "%s, Not moving to HELPER role, So discarding grace LSA", | |
a4544597 | 415 | __func__); |
ad686992 | 416 | return -1; |
417 | } | |
418 | } | |
419 | } | |
420 | ||
d62a17ae | 421 | /* Install the new LSA in the link state database |
422 | (replacing the current database copy). This may cause the | |
423 | routing table calculation to be scheduled. In addition, | |
424 | timestamp the new LSA with the current time. The flooding | |
425 | procedure cannot overwrite the newly installed LSA until | |
426 | MinLSArrival seconds have elapsed. */ | |
427 | ||
45559c4d | 428 | if (!(new = ospf_lsa_install(ospf, oi, new))) |
d62a17ae | 429 | return -1; /* unknown LSA type or any other error condition */ |
430 | ||
431 | /* Acknowledge the receipt of the LSA by sending a Link State | |
432 | Acknowledgment packet back out the receiving interface. */ | |
433 | if (lsa_ack_flag) | |
434 | ospf_flood_delayed_lsa_ack(nbr, new); | |
435 | ||
436 | /* If this new LSA indicates that it was originated by the | |
437 | receiving router itself, the router must take special action, | |
438 | either updating the LSA or in some cases flushing it from | |
439 | the routing domain. */ | |
440 | if (ospf_lsa_is_self_originated(ospf, new)) | |
441 | ospf_process_self_originated_lsa(ospf, new, oi->area); | |
442 | else | |
443 | /* Update statistics value for OSPF-MIB. */ | |
444 | ospf->rx_lsa_count++; | |
445 | ||
446 | return 0; | |
718e3744 | 447 | } |
448 | ||
449 | /* OSPF LSA flooding -- RFC2328 Section 13.3. */ | |
10514170 RW |
450 | int ospf_flood_through_interface(struct ospf_interface *oi, |
451 | struct ospf_neighbor *inbr, | |
452 | struct ospf_lsa *lsa) | |
718e3744 | 453 | { |
d62a17ae | 454 | struct ospf_neighbor *onbr; |
455 | struct route_node *rn; | |
456 | int retx_flag; | |
96b663a3 | 457 | char buf[PREFIX_STRLEN]; |
d62a17ae | 458 | |
459 | if (IS_DEBUG_OSPF_EVENT) | |
460 | zlog_debug( | |
9d51b28c TA |
461 | "%s: considering int %s (%s), INBR(%s), LSA[%s] AGE %u", |
462 | __func__, IF_NAME(oi), ospf_get_name(oi->ospf), | |
463 | inbr ? inet_ntop(AF_INET, &inbr->router_id, buf, | |
464 | sizeof(buf)) | |
465 | : "NULL", | |
046460a1 | 466 | dump_lsa_key(lsa), ntohs(lsa->data->ls_age)); |
d62a17ae | 467 | |
468 | if (!ospf_if_is_enable(oi)) | |
469 | return 0; | |
470 | ||
96fad84a | 471 | /* Remember if new LSA is added to a retransmit list. */ |
d62a17ae | 472 | retx_flag = 0; |
473 | ||
474 | /* Each of the neighbors attached to this interface are examined, | |
475 | to determine whether they must receive the new LSA. The following | |
476 | steps are executed for each neighbor: */ | |
477 | for (rn = route_top(oi->nbrs); rn; rn = route_next(rn)) { | |
478 | struct ospf_lsa *ls_req; | |
479 | ||
480 | if (rn->info == NULL) | |
481 | continue; | |
482 | ||
483 | onbr = rn->info; | |
484 | if (IS_DEBUG_OSPF_EVENT) | |
485 | zlog_debug( | |
9d51b28c TA |
486 | "%s: considering nbr %pI4 via %s (%s), state: %s", |
487 | __func__, &onbr->router_id, IF_NAME(oi), | |
868a0861 | 488 | ospf_get_name(oi->ospf), |
d62a17ae | 489 | lookup_msg(ospf_nsm_state_msg, onbr->state, |
490 | NULL)); | |
491 | ||
492 | /* If the neighbor is in a lesser state than Exchange, it | |
493 | does not participate in flooding, and the next neighbor | |
494 | should be examined. */ | |
495 | if (onbr->state < NSM_Exchange) | |
496 | continue; | |
497 | ||
498 | /* If the adjacency is not yet full (neighbor state is | |
499 | Exchange or Loading), examine the Link state request | |
500 | list associated with this adjacency. If there is an | |
501 | instance of the new LSA on the list, it indicates that | |
502 | the neighboring router has an instance of the LSA | |
503 | already. Compare the new LSA to the neighbor's copy: */ | |
504 | if (onbr->state < NSM_Full) { | |
505 | if (IS_DEBUG_OSPF_EVENT) | |
506 | zlog_debug( | |
9d51b28c TA |
507 | "%s: adj to onbr %pI4 is not Full (%s)", |
508 | __func__, &onbr->router_id, | |
509 | lookup_msg(ospf_nsm_state_msg, | |
510 | onbr->state, NULL)); | |
d62a17ae | 511 | ls_req = ospf_ls_request_lookup(onbr, lsa); |
512 | if (ls_req != NULL) { | |
513 | int ret; | |
514 | ||
515 | ret = ospf_lsa_more_recent(ls_req, lsa); | |
516 | /* The new LSA is less recent. */ | |
517 | if (ret > 0) | |
518 | continue; | |
519 | /* The two copies are the same instance, then | |
520 | delete | |
521 | the LSA from the Link state request list. */ | |
522 | else if (ret == 0) { | |
523 | ospf_ls_request_delete(onbr, ls_req); | |
524 | ospf_check_nbr_loading(onbr); | |
525 | continue; | |
526 | } | |
527 | /* The new LSA is more recent. Delete the LSA | |
528 | from the Link state request list. */ | |
529 | else { | |
530 | ospf_ls_request_delete(onbr, ls_req); | |
531 | ospf_check_nbr_loading(onbr); | |
532 | } | |
533 | } | |
718e3744 | 534 | } |
d62a17ae | 535 | |
536 | if (IS_OPAQUE_LSA(lsa->data->type)) { | |
537 | if (!CHECK_FLAG(onbr->options, OSPF_OPTION_O)) { | |
538 | if (IS_DEBUG_OSPF(lsa, LSA_FLOODING)) | |
539 | zlog_debug( | |
c067e23e | 540 | "%s: Skipping neighbor %s via %pI4 -- Not Opaque-capable.", |
9d51b28c | 541 | __func__, IF_NAME(oi), |
c067e23e | 542 | &onbr->router_id); |
d62a17ae | 543 | continue; |
544 | } | |
718e3744 | 545 | } |
718e3744 | 546 | |
f573ec60 DS |
547 | /* If the new LSA was received from this neighbor, |
548 | examine the next neighbor. */ | |
d62a17ae | 549 | if (inbr) { |
550 | /* | |
551 | * Triggered by LSUpd message parser "ospf_ls_upd ()". | |
552 | * E.g., all LSAs handling here is received via network. | |
553 | */ | |
554 | if (IPV4_ADDR_SAME(&inbr->router_id, | |
555 | &onbr->router_id)) { | |
556 | if (IS_DEBUG_OSPF(lsa, LSA_FLOODING)) | |
557 | zlog_debug( | |
c067e23e | 558 | "%s: Skipping neighbor %s via %pI4 -- inbr == onbr.", |
9d51b28c | 559 | __func__, IF_NAME(oi), |
c067e23e | 560 | &inbr->router_id); |
d62a17ae | 561 | continue; |
562 | } | |
563 | } else { | |
564 | /* | |
565 | * Triggered by MaxAge remover, so far. | |
566 | * NULL "inbr" means flooding starts from this node. | |
567 | */ | |
568 | if (IPV4_ADDR_SAME(&lsa->data->adv_router, | |
569 | &onbr->router_id)) { | |
570 | if (IS_DEBUG_OSPF(lsa, LSA_FLOODING)) | |
571 | zlog_debug( | |
c067e23e | 572 | "%s: Skipping neighbor %s via %pI4 -- lsah->adv_router == onbr.", |
9d51b28c | 573 | __func__, IF_NAME(oi), |
c067e23e | 574 | &onbr->router_id); |
d62a17ae | 575 | continue; |
576 | } | |
577 | } | |
718e3744 | 578 | |
d62a17ae | 579 | /* Add the new LSA to the Link state retransmission list |
580 | for the adjacency. The LSA will be retransmitted | |
581 | at intervals until an acknowledgment is seen from | |
582 | the neighbor. */ | |
583 | ospf_ls_retransmit_add(onbr, lsa); | |
584 | retx_flag = 1; | |
718e3744 | 585 | } |
d62a17ae | 586 | |
587 | /* If in the previous step, the LSA was NOT added to any of | |
588 | the Link state retransmission lists, there is no need to | |
589 | flood the LSA out the interface. */ | |
590 | if (retx_flag == 0) { | |
591 | return (inbr && inbr->oi == oi); | |
592 | } | |
593 | ||
594 | /* if we've received the lsa on this interface we need to perform | |
595 | additional checking */ | |
596 | if (inbr && (inbr->oi == oi)) { | |
597 | /* If the new LSA was received on this interface, and it was | |
598 | received from either the Designated Router or the Backup | |
599 | Designated Router, chances are that all the neighbors have | |
600 | received the LSA already. */ | |
601 | if (NBR_IS_DR(inbr) || NBR_IS_BDR(inbr)) { | |
231af0a5 | 602 | if (IS_DEBUG_OSPF(lsa, LSA_FLOODING)) |
9d51b28c TA |
603 | zlog_debug("%s: DR/BDR NOT SEND to int %s (%s)", |
604 | __func__, IF_NAME(oi), | |
605 | ospf_get_name(oi->ospf)); | |
d62a17ae | 606 | return 1; |
607 | } | |
608 | ||
609 | /* If the new LSA was received on this interface, and the | |
610 | interface state is Backup, examine the next interface. The | |
611 | Designated Router will do the flooding on this interface. | |
612 | However, if the Designated Router fails the router will | |
613 | end up retransmitting the updates. */ | |
614 | ||
615 | if (oi->state == ISM_Backup) { | |
231af0a5 | 616 | if (IS_DEBUG_OSPF(lsa, LSA_FLOODING)) |
d62a17ae | 617 | zlog_debug( |
9d51b28c TA |
618 | "%s: ISM_Backup NOT SEND to int %s (%s)", |
619 | __func__, IF_NAME(oi), | |
620 | ospf_get_name(oi->ospf)); | |
d62a17ae | 621 | return 1; |
622 | } | |
718e3744 | 623 | } |
d62a17ae | 624 | |
625 | /* The LSA must be flooded out the interface. Send a Link State | |
626 | Update packet (including the new LSA as contents) out the | |
627 | interface. The LSA's LS age must be incremented by InfTransDelay | |
628 | (which must be > 0) when it is copied into the outgoing Link | |
629 | State Update packet (until the LS age field reaches the maximum | |
630 | value of MaxAge). */ | |
231af0a5 | 631 | if (IS_DEBUG_OSPF(lsa, LSA_FLOODING)) |
9d51b28c TA |
632 | zlog_debug("%s: DR/BDR sending upd to int %s (%s)", __func__, |
633 | IF_NAME(oi), ospf_get_name(oi->ospf)); | |
d62a17ae | 634 | |
635 | /* RFC2328 Section 13.3 | |
636 | On non-broadcast networks, separate Link State Update | |
637 | packets must be sent, as unicasts, to each adjacent neighbor | |
638 | (i.e., those in state Exchange or greater). The destination | |
639 | IP addresses for these packets are the neighbors' IP | |
640 | addresses. */ | |
641 | if (oi->type == OSPF_IFTYPE_NBMA) { | |
d62a17ae | 642 | struct ospf_neighbor *nbr; |
643 | ||
644 | for (rn = route_top(oi->nbrs); rn; rn = route_next(rn)) | |
645 | if ((nbr = rn->info) != NULL) | |
646 | if (nbr != oi->nbr_self | |
647 | && nbr->state >= NSM_Exchange) | |
648 | ospf_ls_upd_send_lsa( | |
649 | nbr, lsa, | |
650 | OSPF_SEND_PACKET_DIRECT); | |
651 | } else | |
652 | ospf_ls_upd_send_lsa(oi->nbr_self, lsa, | |
653 | OSPF_SEND_PACKET_INDIRECT); | |
654 | ||
655 | return 0; | |
718e3744 | 656 | } |
657 | ||
d62a17ae | 658 | int ospf_flood_through_area(struct ospf_area *area, struct ospf_neighbor *inbr, |
659 | struct ospf_lsa *lsa) | |
718e3744 | 660 | { |
d62a17ae | 661 | struct listnode *node, *nnode; |
662 | struct ospf_interface *oi; | |
663 | int lsa_ack_flag = 0; | |
664 | ||
9b50aa1f | 665 | assert(area); |
d62a17ae | 666 | /* All other types are specific to a single area (Area A). The |
667 | eligible interfaces are all those interfaces attaching to the | |
668 | Area A. If Area A is the backbone, this includes all the virtual | |
669 | links. */ | |
670 | for (ALL_LIST_ELEMENTS(area->oiflist, node, nnode, oi)) { | |
671 | if (area->area_id.s_addr != OSPF_AREA_BACKBONE | |
672 | && oi->type == OSPF_IFTYPE_VIRTUALLINK) | |
673 | continue; | |
674 | ||
675 | if ((lsa->data->type == OSPF_OPAQUE_LINK_LSA) | |
676 | && (lsa->oi != oi)) { | |
677 | /* | |
678 | * Link local scoped Opaque-LSA should only be flooded | |
679 | * for the link on which the LSA has received. | |
680 | */ | |
681 | if (IS_DEBUG_OSPF(lsa, LSA_FLOODING)) | |
682 | zlog_debug( | |
683 | "Type-9 Opaque-LSA: lsa->oi(%p) != oi(%p)", | |
684 | (void *)lsa->oi, (void *)oi); | |
685 | continue; | |
686 | } | |
687 | ||
688 | if (ospf_flood_through_interface(oi, inbr, lsa)) | |
689 | lsa_ack_flag = 1; | |
690 | } | |
691 | ||
692 | return (lsa_ack_flag); | |
718e3744 | 693 | } |
694 | ||
d62a17ae | 695 | int ospf_flood_through_as(struct ospf *ospf, struct ospf_neighbor *inbr, |
696 | struct ospf_lsa *lsa) | |
718e3744 | 697 | { |
d62a17ae | 698 | struct listnode *node; |
699 | struct ospf_area *area; | |
700 | int lsa_ack_flag; | |
701 | ||
702 | lsa_ack_flag = 0; | |
703 | ||
704 | /* The incoming LSA is type 5 or type 7 (AS-EXTERNAL or AS-NSSA ) | |
705 | ||
706 | Divert the Type-5 LSA's to all non-NSSA/STUB areas | |
707 | ||
708 | Divert the Type-7 LSA's to all NSSA areas | |
709 | ||
710 | AS-external-LSAs are flooded throughout the entire AS, with the | |
711 | exception of stub areas (see Section 3.6). The eligible | |
712 | interfaces are all the router's interfaces, excluding virtual | |
713 | links and those interfaces attaching to stub areas. */ | |
714 | ||
715 | if (CHECK_FLAG(lsa->flags, OSPF_LSA_LOCAL_XLT)) /* Translated from 7 */ | |
716 | if (IS_DEBUG_OSPF_NSSA) | |
717 | zlog_debug("Flood/AS: NSSA TRANSLATED LSA"); | |
718 | ||
719 | for (ALL_LIST_ELEMENTS_RO(ospf->areas, node, area)) { | |
720 | int continue_flag = 0; | |
721 | struct listnode *if_node; | |
722 | struct ospf_interface *oi; | |
723 | ||
724 | switch (area->external_routing) { | |
725 | /* Don't send AS externals into stub areas. Various types | |
726 | of support for partial stub areas can be implemented | |
727 | here. NSSA's will receive Type-7's that have areas | |
728 | matching the originl LSA. */ | |
729 | case OSPF_AREA_NSSA: /* Sending Type 5 or 7 into NSSA area */ | |
730 | /* Type-7, flood NSSA area */ | |
731 | if (lsa->data->type == OSPF_AS_NSSA_LSA | |
732 | && area == lsa->area) | |
733 | /* We will send it. */ | |
734 | continue_flag = 0; | |
735 | else | |
736 | continue_flag = 1; /* Skip this NSSA area for | |
737 | Type-5's et al */ | |
738 | break; | |
739 | ||
740 | case OSPF_AREA_TYPE_MAX: | |
741 | case OSPF_AREA_STUB: | |
742 | continue_flag = 1; /* Skip this area. */ | |
743 | break; | |
744 | ||
745 | case OSPF_AREA_DEFAULT: | |
746 | default: | |
747 | /* No Type-7 into normal area */ | |
748 | if (lsa->data->type == OSPF_AS_NSSA_LSA) | |
749 | continue_flag = 1; /* skip Type-7 */ | |
750 | else | |
751 | continue_flag = 0; /* Do this area. */ | |
752 | break; | |
753 | } | |
718e3744 | 754 | |
d62a17ae | 755 | /* Do continue for above switch. Saves a big if then mess */ |
756 | if (continue_flag) | |
757 | continue; /* main for-loop */ | |
718e3744 | 758 | |
d62a17ae | 759 | /* send to every interface in this area */ |
718e3744 | 760 | |
d62a17ae | 761 | for (ALL_LIST_ELEMENTS_RO(area->oiflist, if_node, oi)) { |
762 | /* Skip virtual links */ | |
763 | if (oi->type != OSPF_IFTYPE_VIRTUALLINK) | |
764 | if (ospf_flood_through_interface(oi, inbr, | |
765 | lsa)) /* lsa */ | |
766 | lsa_ack_flag = 1; | |
767 | } | |
768 | } /* main area for-loop */ | |
718e3744 | 769 | |
d62a17ae | 770 | return (lsa_ack_flag); |
771 | } | |
718e3744 | 772 | |
d62a17ae | 773 | int ospf_flood_through(struct ospf *ospf, struct ospf_neighbor *inbr, |
774 | struct ospf_lsa *lsa) | |
775 | { | |
776 | int lsa_ack_flag = 0; | |
718e3744 | 777 | |
f573ec60 DS |
778 | /* Type-7 LSA's for NSSA are flooded throughout the AS here, and |
779 | upon return are updated in the LSDB for Type-7's. Later, | |
780 | re-fresh will re-send them (and also, if ABR, packet code will | |
781 | translate to Type-5's) | |
718e3744 | 782 | |
f573ec60 DS |
783 | As usual, Type-5 LSA's (if not DISCARDED because we are STUB or |
784 | NSSA) are flooded throughout the AS, and are updated in the | |
785 | global table. */ | |
d62a17ae | 786 | /* |
787 | * At the common sub-sub-function "ospf_flood_through_interface()", | |
788 | * a parameter "inbr" will be used to distinguish the called context | |
789 | * whether the given LSA was received from the neighbor, or the | |
790 | * flooding for the LSA starts from this node (e.g. the LSA was self- | |
791 | * originated, or the LSA is going to be flushed from routing domain). | |
792 | * | |
793 | * So, for consistency reasons, this function "ospf_flood_through()" | |
794 | * should also allow the usage that the given "inbr" parameter to be | |
795 | * NULL. If we do so, corresponding AREA parameter should be referred | |
796 | * by "lsa->area", instead of "inbr->oi->area". | |
797 | */ | |
798 | switch (lsa->data->type) { | |
799 | case OSPF_AS_EXTERNAL_LSA: /* Type-5 */ | |
800 | case OSPF_OPAQUE_AS_LSA: | |
801 | lsa_ack_flag = ospf_flood_through_as(ospf, inbr, lsa); | |
802 | break; | |
803 | /* Type-7 Only received within NSSA, then flooded */ | |
804 | case OSPF_AS_NSSA_LSA: | |
805 | /* Any P-bit was installed with the Type-7. */ | |
806 | ||
807 | if (IS_DEBUG_OSPF_NSSA) | |
808 | zlog_debug( | |
809 | "ospf_flood_through: LOCAL NSSA FLOOD of Type-7."); | |
810 | /* Fallthrough */ | |
811 | default: | |
812 | lsa_ack_flag = ospf_flood_through_area(lsa->area, inbr, lsa); | |
813 | break; | |
718e3744 | 814 | } |
718e3744 | 815 | |
d62a17ae | 816 | return (lsa_ack_flag); |
817 | } | |
6b0655a2 | 818 | |
718e3744 | 819 | |
820 | /* Management functions for neighbor's Link State Request list. */ | |
d62a17ae | 821 | void ospf_ls_request_add(struct ospf_neighbor *nbr, struct ospf_lsa *lsa) |
718e3744 | 822 | { |
d62a17ae | 823 | /* |
824 | * We cannot make use of the newly introduced callback function | |
825 | * "lsdb->new_lsa_hook" to replace debug output below, just because | |
826 | * it seems no simple and smart way to pass neighbor information to | |
827 | * the common function "ospf_lsdb_add()" -- endo. | |
828 | */ | |
829 | if (IS_DEBUG_OSPF(lsa, LSA_FLOODING)) | |
96b663a3 | 830 | zlog_debug("RqstL(%lu)++, NBR(%pI4(%s)), LSA[%s]", |
d62a17ae | 831 | ospf_ls_request_count(nbr), |
96b663a3 | 832 | &nbr->router_id, |
868a0861 | 833 | ospf_get_name(nbr->oi->ospf), dump_lsa_key(lsa)); |
d62a17ae | 834 | |
835 | ospf_lsdb_add(&nbr->ls_req, lsa); | |
718e3744 | 836 | } |
837 | ||
d62a17ae | 838 | unsigned long ospf_ls_request_count(struct ospf_neighbor *nbr) |
718e3744 | 839 | { |
d62a17ae | 840 | return ospf_lsdb_count_all(&nbr->ls_req); |
718e3744 | 841 | } |
842 | ||
d62a17ae | 843 | int ospf_ls_request_isempty(struct ospf_neighbor *nbr) |
718e3744 | 844 | { |
d62a17ae | 845 | return ospf_lsdb_isempty(&nbr->ls_req); |
718e3744 | 846 | } |
847 | ||
848 | /* Remove LSA from neighbor's ls-request list. */ | |
d62a17ae | 849 | void ospf_ls_request_delete(struct ospf_neighbor *nbr, struct ospf_lsa *lsa) |
718e3744 | 850 | { |
d62a17ae | 851 | if (nbr->ls_req_last == lsa) { |
852 | ospf_lsa_unlock(&nbr->ls_req_last); | |
853 | nbr->ls_req_last = NULL; | |
854 | } | |
855 | ||
856 | if (IS_DEBUG_OSPF(lsa, LSA_FLOODING)) /* -- endo. */ | |
96b663a3 | 857 | zlog_debug("RqstL(%lu)--, NBR(%pI4(%s)), LSA[%s]", |
d62a17ae | 858 | ospf_ls_request_count(nbr), |
96b663a3 | 859 | &nbr->router_id, |
868a0861 | 860 | ospf_get_name(nbr->oi->ospf), dump_lsa_key(lsa)); |
d62a17ae | 861 | |
862 | ospf_lsdb_delete(&nbr->ls_req, lsa); | |
718e3744 | 863 | } |
864 | ||
865 | /* Remove all LSA from neighbor's ls-requenst list. */ | |
d62a17ae | 866 | void ospf_ls_request_delete_all(struct ospf_neighbor *nbr) |
718e3744 | 867 | { |
d62a17ae | 868 | ospf_lsa_unlock(&nbr->ls_req_last); |
869 | nbr->ls_req_last = NULL; | |
870 | ospf_lsdb_delete_all(&nbr->ls_req); | |
718e3744 | 871 | } |
872 | ||
873 | /* Lookup LSA from neighbor's ls-request list. */ | |
d62a17ae | 874 | struct ospf_lsa *ospf_ls_request_lookup(struct ospf_neighbor *nbr, |
875 | struct ospf_lsa *lsa) | |
718e3744 | 876 | { |
d62a17ae | 877 | return ospf_lsdb_lookup(&nbr->ls_req, lsa); |
718e3744 | 878 | } |
879 | ||
d62a17ae | 880 | struct ospf_lsa *ospf_ls_request_new(struct lsa_header *lsah) |
718e3744 | 881 | { |
d62a17ae | 882 | struct ospf_lsa *new; |
718e3744 | 883 | |
5b3d4186 | 884 | new = ospf_lsa_new_and_data(OSPF_LSA_HEADER_SIZE); |
d62a17ae | 885 | memcpy(new->data, lsah, OSPF_LSA_HEADER_SIZE); |
718e3744 | 886 | |
d62a17ae | 887 | return new; |
718e3744 | 888 | } |
889 | ||
6b0655a2 | 890 | |
718e3744 | 891 | /* Management functions for neighbor's ls-retransmit list. */ |
d62a17ae | 892 | unsigned long ospf_ls_retransmit_count(struct ospf_neighbor *nbr) |
718e3744 | 893 | { |
d62a17ae | 894 | return ospf_lsdb_count_all(&nbr->ls_rxmt); |
718e3744 | 895 | } |
896 | ||
d62a17ae | 897 | unsigned long ospf_ls_retransmit_count_self(struct ospf_neighbor *nbr, |
898 | int lsa_type) | |
718e3744 | 899 | { |
d62a17ae | 900 | return ospf_lsdb_count_self(&nbr->ls_rxmt, lsa_type); |
718e3744 | 901 | } |
902 | ||
d62a17ae | 903 | int ospf_ls_retransmit_isempty(struct ospf_neighbor *nbr) |
718e3744 | 904 | { |
d62a17ae | 905 | return ospf_lsdb_isempty(&nbr->ls_rxmt); |
718e3744 | 906 | } |
907 | ||
908 | /* Add LSA to be retransmitted to neighbor's ls-retransmit list. */ | |
d62a17ae | 909 | void ospf_ls_retransmit_add(struct ospf_neighbor *nbr, struct ospf_lsa *lsa) |
718e3744 | 910 | { |
d62a17ae | 911 | struct ospf_lsa *old; |
718e3744 | 912 | |
d62a17ae | 913 | old = ospf_ls_retransmit_lookup(nbr, lsa); |
718e3744 | 914 | |
d62a17ae | 915 | if (ospf_lsa_more_recent(old, lsa) < 0) { |
916 | if (old) { | |
917 | old->retransmit_counter--; | |
868a0861 | 918 | if (IS_DEBUG_OSPF(lsa, LSA_FLOODING)) |
96b663a3 | 919 | zlog_debug("RXmtL(%lu)--, NBR(%pI4(%s)), LSA[%s]", |
868a0861 | 920 | ospf_ls_retransmit_count(nbr), |
96b663a3 | 921 | &nbr->router_id, |
868a0861 DS |
922 | ospf_get_name(nbr->oi->ospf), |
923 | dump_lsa_key(old)); | |
d62a17ae | 924 | ospf_lsdb_delete(&nbr->ls_rxmt, old); |
925 | } | |
926 | lsa->retransmit_counter++; | |
927 | /* | |
928 | * We cannot make use of the newly introduced callback function | |
929 | * "lsdb->new_lsa_hook" to replace debug output below, just | |
930 | * because | |
931 | * it seems no simple and smart way to pass neighbor information | |
932 | * to | |
933 | * the common function "ospf_lsdb_add()" -- endo. | |
934 | */ | |
935 | if (IS_DEBUG_OSPF(lsa, LSA_FLOODING)) | |
96b663a3 | 936 | zlog_debug("RXmtL(%lu)++, NBR(%pI4(%s)), LSA[%s]", |
d62a17ae | 937 | ospf_ls_retransmit_count(nbr), |
96b663a3 | 938 | &nbr->router_id, |
868a0861 | 939 | ospf_get_name(nbr->oi->ospf), |
d62a17ae | 940 | dump_lsa_key(lsa)); |
941 | ospf_lsdb_add(&nbr->ls_rxmt, lsa); | |
718e3744 | 942 | } |
718e3744 | 943 | } |
944 | ||
945 | /* Remove LSA from neibghbor's ls-retransmit list. */ | |
d62a17ae | 946 | void ospf_ls_retransmit_delete(struct ospf_neighbor *nbr, struct ospf_lsa *lsa) |
718e3744 | 947 | { |
d62a17ae | 948 | if (ospf_ls_retransmit_lookup(nbr, lsa)) { |
949 | lsa->retransmit_counter--; | |
950 | if (IS_DEBUG_OSPF(lsa, LSA_FLOODING)) /* -- endo. */ | |
96b663a3 | 951 | zlog_debug("RXmtL(%lu)--, NBR(%pI4(%s)), LSA[%s]", |
d62a17ae | 952 | ospf_ls_retransmit_count(nbr), |
96b663a3 | 953 | &nbr->router_id, |
868a0861 | 954 | ospf_get_name(nbr->oi->ospf), |
d62a17ae | 955 | dump_lsa_key(lsa)); |
956 | ospf_lsdb_delete(&nbr->ls_rxmt, lsa); | |
957 | } | |
718e3744 | 958 | } |
959 | ||
960 | /* Clear neighbor's ls-retransmit list. */ | |
d62a17ae | 961 | void ospf_ls_retransmit_clear(struct ospf_neighbor *nbr) |
718e3744 | 962 | { |
d62a17ae | 963 | struct ospf_lsdb *lsdb; |
964 | int i; | |
718e3744 | 965 | |
d62a17ae | 966 | lsdb = &nbr->ls_rxmt; |
718e3744 | 967 | |
d62a17ae | 968 | for (i = OSPF_MIN_LSA; i < OSPF_MAX_LSA; i++) { |
969 | struct route_table *table = lsdb->type[i].db; | |
970 | struct route_node *rn; | |
971 | struct ospf_lsa *lsa; | |
718e3744 | 972 | |
d62a17ae | 973 | for (rn = route_top(table); rn; rn = route_next(rn)) |
974 | if ((lsa = rn->info) != NULL) | |
975 | ospf_ls_retransmit_delete(nbr, lsa); | |
976 | } | |
718e3744 | 977 | |
d62a17ae | 978 | ospf_lsa_unlock(&nbr->ls_req_last); |
979 | nbr->ls_req_last = NULL; | |
718e3744 | 980 | } |
981 | ||
982 | /* Lookup LSA from neighbor's ls-retransmit list. */ | |
d62a17ae | 983 | struct ospf_lsa *ospf_ls_retransmit_lookup(struct ospf_neighbor *nbr, |
984 | struct ospf_lsa *lsa) | |
718e3744 | 985 | { |
d62a17ae | 986 | return ospf_lsdb_lookup(&nbr->ls_rxmt, lsa); |
718e3744 | 987 | } |
988 | ||
d62a17ae | 989 | static void ospf_ls_retransmit_delete_nbr_if(struct ospf_interface *oi, |
990 | struct ospf_lsa *lsa) | |
718e3744 | 991 | { |
d62a17ae | 992 | struct route_node *rn; |
993 | struct ospf_neighbor *nbr; | |
994 | struct ospf_lsa *lsr; | |
995 | ||
996 | if (ospf_if_is_enable(oi)) | |
997 | for (rn = route_top(oi->nbrs); rn; rn = route_next(rn)) | |
998 | /* If LSA find in LS-retransmit list, then remove it. */ | |
999 | if ((nbr = rn->info) != NULL) { | |
1000 | lsr = ospf_ls_retransmit_lookup(nbr, lsa); | |
1001 | ||
1002 | /* If LSA find in ls-retransmit list, remove it. | |
1003 | */ | |
1004 | if (lsr != NULL | |
1005 | && lsr->data->ls_seqnum | |
1006 | == lsa->data->ls_seqnum) | |
1007 | ospf_ls_retransmit_delete(nbr, lsr); | |
1008 | } | |
718e3744 | 1009 | } |
1010 | ||
d62a17ae | 1011 | void ospf_ls_retransmit_delete_nbr_area(struct ospf_area *area, |
1012 | struct ospf_lsa *lsa) | |
718e3744 | 1013 | { |
d62a17ae | 1014 | struct listnode *node, *nnode; |
1015 | struct ospf_interface *oi; | |
718e3744 | 1016 | |
d62a17ae | 1017 | for (ALL_LIST_ELEMENTS(area->oiflist, node, nnode, oi)) |
1018 | ospf_ls_retransmit_delete_nbr_if(oi, lsa); | |
68980084 | 1019 | } |
718e3744 | 1020 | |
d62a17ae | 1021 | void ospf_ls_retransmit_delete_nbr_as(struct ospf *ospf, struct ospf_lsa *lsa) |
68980084 | 1022 | { |
d62a17ae | 1023 | struct listnode *node, *nnode; |
1024 | struct ospf_interface *oi; | |
718e3744 | 1025 | |
d62a17ae | 1026 | for (ALL_LIST_ELEMENTS(ospf->oiflist, node, nnode, oi)) |
1027 | ospf_ls_retransmit_delete_nbr_if(oi, lsa); | |
718e3744 | 1028 | } |
1029 | ||
6b0655a2 | 1030 | |
d62a17ae | 1031 | /* Sets ls_age to MaxAge and floods throu the area. |
96fad84a | 1032 | When we implement ASE routing, there will be another function |
718e3744 | 1033 | flushing an LSA from the whole domain. */ |
d62a17ae | 1034 | void ospf_lsa_flush_area(struct ospf_lsa *lsa, struct ospf_area *area) |
718e3744 | 1035 | { |
10514170 RW |
1036 | struct ospf *ospf = area->ospf; |
1037 | ||
1038 | if (ospf_lsa_is_self_originated(ospf, lsa) | |
1039 | && ospf->gr_info.restart_in_progress) { | |
1040 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) | |
1041 | zlog_debug( | |
1042 | "%s:LSA[Type%d:%pI4]: Graceful Restart in progress -- not flushing self-originated LSA", | |
1043 | ospf_get_name(ospf), lsa->data->type, | |
1044 | &lsa->data->id); | |
1045 | return; | |
1046 | } | |
1047 | ||
d62a17ae | 1048 | /* Reset the lsa origination time such that it gives |
1049 | more time for the ACK to be received and avoid | |
1050 | retransmissions */ | |
1051 | lsa->data->ls_age = htons(OSPF_LSA_MAXAGE); | |
046460a1 | 1052 | if (IS_DEBUG_OSPF_EVENT) |
e9505bc6 RW |
1053 | zlog_debug("%s: MaxAge set to LSA[%s]", __func__, |
1054 | dump_lsa_key(lsa)); | |
d62a17ae | 1055 | monotime(&lsa->tv_recv); |
1056 | lsa->tv_orig = lsa->tv_recv; | |
1057 | ospf_flood_through_area(area, NULL, lsa); | |
10514170 | 1058 | ospf_lsa_maxage(ospf, lsa); |
718e3744 | 1059 | } |
1060 | ||
d62a17ae | 1061 | void ospf_lsa_flush_as(struct ospf *ospf, struct ospf_lsa *lsa) |
718e3744 | 1062 | { |
10514170 RW |
1063 | if (ospf_lsa_is_self_originated(ospf, lsa) |
1064 | && ospf->gr_info.restart_in_progress) { | |
1065 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) | |
1066 | zlog_debug( | |
1067 | "%s:LSA[Type%d:%pI4]: Graceful Restart in progress -- not flushing self-originated LSA", | |
1068 | ospf_get_name(ospf), lsa->data->type, | |
1069 | &lsa->data->id); | |
1070 | return; | |
1071 | } | |
1072 | ||
d62a17ae | 1073 | /* Reset the lsa origination time such that it gives |
1074 | more time for the ACK to be received and avoid | |
1075 | retransmissions */ | |
1076 | lsa->data->ls_age = htons(OSPF_LSA_MAXAGE); | |
e9505bc6 RW |
1077 | if (IS_DEBUG_OSPF_EVENT) |
1078 | zlog_debug("%s: MaxAge set to LSA[%s]", __func__, | |
1079 | dump_lsa_key(lsa)); | |
d62a17ae | 1080 | monotime(&lsa->tv_recv); |
1081 | lsa->tv_orig = lsa->tv_recv; | |
1082 | ospf_flood_through_as(ospf, NULL, lsa); | |
1083 | ospf_lsa_maxage(ospf, lsa); | |
718e3744 | 1084 | } |
02d942c9 | 1085 | |
d62a17ae | 1086 | void ospf_lsa_flush(struct ospf *ospf, struct ospf_lsa *lsa) |
02d942c9 | 1087 | { |
d62a17ae | 1088 | lsa->data->ls_age = htons(OSPF_LSA_MAXAGE); |
1089 | ||
1090 | switch (lsa->data->type) { | |
1091 | case OSPF_ROUTER_LSA: | |
1092 | case OSPF_NETWORK_LSA: | |
1093 | case OSPF_SUMMARY_LSA: | |
1094 | case OSPF_ASBR_SUMMARY_LSA: | |
1095 | case OSPF_AS_NSSA_LSA: | |
1096 | case OSPF_OPAQUE_LINK_LSA: | |
1097 | case OSPF_OPAQUE_AREA_LSA: | |
1098 | ospf_lsa_flush_area(lsa, lsa->area); | |
1099 | break; | |
1100 | case OSPF_AS_EXTERNAL_LSA: | |
1101 | case OSPF_OPAQUE_AS_LSA: | |
1102 | ospf_lsa_flush_as(ospf, lsa); | |
1103 | break; | |
1104 | default: | |
1105 | zlog_info("%s: Unknown LSA type %u", __func__, lsa->data->type); | |
1106 | break; | |
1107 | } | |
02d942c9 | 1108 | } |