2 * OSPF Flooding -- RFC2328 Section 13.
3 * Copyright (C) 1999, 2000 Toshiaki Takada
5 * This file is part of GNU Zebra.
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.
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.
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
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"
51 extern struct zclient
*zclient
;
53 /* Do the LSA acking specified in table 19, Section 13.5, row 2
54 * This get called from ospf_flood_out_interface. Declared inline
56 static void ospf_flood_delayed_lsa_ack(struct ospf_neighbor
*inbr
,
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 */
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 */
70 /* Deal with router as BDR */
71 if (inbr
->oi
->state
== ISM_Backup
&& !NBR_IS_DR(inbr
))
74 /* Schedule a delayed LSA Ack to be sent */
75 listnode_add(inbr
->oi
->ls_ack
,
76 ospf_lsa_lock(lsa
)); /* delayed LSA Ack */
79 /* Check LSA is related to external info. */
80 struct external_info
*ospf_external_info_check(struct ospf
*ospf
,
83 struct as_external_lsa
*al
;
85 struct route_node
*rn
;
88 al
= (struct as_external_lsa
*)lsa
->data
;
91 p
.prefix
= lsa
->data
->id
;
92 p
.prefixlen
= ip_masklen(al
->mask
);
94 for (type
= 0; type
<= ZEBRA_ROUTE_MAX
; type
++) {
99 ? vrf_bitmap_check(zclient
->default_information
,
101 : (zclient
->mi_redist
[AFI_IP
][type
].enabled
103 zclient
->redist
[AFI_IP
][type
],
105 // Pending: check for MI above.
107 struct list
*ext_list
;
108 struct listnode
*node
;
109 struct ospf_external
*ext
;
111 ext_list
= ospf
->external
[type
];
115 for (ALL_LIST_ELEMENTS_RO(ext_list
, node
, ext
)) {
117 if (ext
->external_info
)
118 rn
= route_node_lookup(
120 (struct prefix
*)&p
);
122 route_unlock_node(rn
);
123 if (rn
->info
!= NULL
)
124 return (struct external_info
*)
134 static void ospf_process_self_originated_lsa(struct ospf
*ospf
,
135 struct ospf_lsa
*new,
136 struct ospf_area
*area
)
138 struct ospf_interface
*oi
;
139 struct external_info
*ei
;
140 struct listnode
*node
;
142 if (IS_DEBUG_OSPF_EVENT
)
144 "LSA[Type%d:%s]: Process self-originated LSA seq 0x%x",
145 new->data
->type
, inet_ntoa(new->data
->id
),
146 ntohl(new->data
->ls_seqnum
));
148 /* If we're here, we installed a self-originated LSA that we received
149 from a neighbor, i.e. it's more recent. We must see whether we want
151 If yes, we should use this LSA's sequence number and reoriginate
153 if not --- we must flush this LSA from the domain. */
154 switch (new->data
->type
) {
155 case OSPF_ROUTER_LSA
:
156 /* Originate a new instance and schedule flooding */
157 if (area
->router_lsa_self
)
158 area
->router_lsa_self
->data
->ls_seqnum
=
159 new->data
->ls_seqnum
;
160 ospf_router_lsa_update_area(area
);
162 case OSPF_NETWORK_LSA
:
163 case OSPF_OPAQUE_LINK_LSA
:
164 /* We must find the interface the LSA could belong to.
165 If the interface is no more a broadcast type or we are no
167 the DR, we flush the LSA otherwise -- create the new instance
169 schedule flooding. */
171 /* Look through all interfaces, not just area, since interface
172 could be moved from one area to another. */
173 for (ALL_LIST_ELEMENTS_RO(ospf
->oiflist
, node
, oi
))
174 /* These are sanity check. */
175 if (IPV4_ADDR_SAME(&oi
->address
->u
.prefix4
,
178 || oi
->type
!= OSPF_IFTYPE_BROADCAST
179 || !IPV4_ADDR_SAME(&oi
->address
->u
.prefix4
,
181 ospf_schedule_lsa_flush_area(area
, new);
185 if (new->data
->type
== OSPF_OPAQUE_LINK_LSA
) {
186 ospf_opaque_lsa_refresh(new);
190 if (oi
->network_lsa_self
)
191 oi
->network_lsa_self
->data
->ls_seqnum
=
192 new->data
->ls_seqnum
;
193 /* Schedule network-LSA origination. */
194 ospf_network_lsa_update(oi
);
198 case OSPF_SUMMARY_LSA
:
199 case OSPF_ASBR_SUMMARY_LSA
:
200 ospf_schedule_abr_task(ospf
);
202 case OSPF_AS_EXTERNAL_LSA
:
203 case OSPF_AS_NSSA_LSA
:
204 if ((new->data
->type
== OSPF_AS_EXTERNAL_LSA
)
205 && CHECK_FLAG(new->flags
, OSPF_LSA_LOCAL_XLT
)) {
206 ospf_translated_nssa_refresh(ospf
, NULL
, new);
209 ei
= ospf_external_info_check(ospf
, new);
211 ospf_external_lsa_refresh(ospf
, new, ei
,
214 ospf_lsa_flush_as(ospf
, new);
216 case OSPF_OPAQUE_AREA_LSA
:
217 ospf_opaque_lsa_refresh(new);
219 case OSPF_OPAQUE_AS_LSA
:
220 ospf_opaque_lsa_refresh(new);
221 /* Reconsideration may needed. */ /* XXX */
228 /* OSPF LSA flooding -- RFC2328 Section 13.(5). */
230 /* Now Updated for NSSA operation, as follows:
233 Type-5's have no change. Blocked to STUB or NSSA.
235 Type-7's can be received, and if a DR
236 they will also flood the local NSSA Area as Type-7's
238 If a Self-Originated LSA (now an ASBR),
239 The LSDB will be updated as Type-5's, (for continual re-fresh)
241 If an NSSA-IR it is installed/flooded as Type-7, P-bit on.
242 if an NSSA-ABR it is installed/flooded as Type-7, P-bit off.
244 Later, during the ABR TASK, if the ABR is the Elected NSSA
245 translator, then All Type-7s (with P-bit ON) are Translated to
246 Type-5's and flooded to all non-NSSA/STUB areas.
248 During ASE Calculations,
249 non-ABRs calculate external routes from Type-7's
250 ABRs calculate external routes from Type-5's and non-self Type-7s
252 int ospf_flood(struct ospf
*ospf
, struct ospf_neighbor
*nbr
,
253 struct ospf_lsa
*current
, struct ospf_lsa
*new)
255 struct ospf_interface
*oi
;
258 /* Type-7 LSA's will be flooded throughout their native NSSA area,
259 but will also be flooded as Type-5's into ABR capable links. */
261 if (IS_DEBUG_OSPF_EVENT
)
263 "LSA[Flooding]: start, NBR %s (%s), cur(%p), New-LSA[%s]",
264 inet_ntoa(nbr
->router_id
),
265 lookup_msg(ospf_nsm_state_msg
, nbr
->state
, NULL
),
266 (void *)current
, dump_lsa_key(new));
270 /* If there is already a database copy, and if the
271 database copy was received via flooding and installed less
272 than MinLSArrival seconds ago, discard the new LSA
273 (without acknowledging it). */
274 if (current
!= NULL
) /* -- endo. */
276 if (IS_LSA_SELF(current
)
277 && (ntohs(current
->data
->ls_age
) == 0
278 && ntohl(current
->data
->ls_seqnum
)
279 == OSPF_INITIAL_SEQUENCE_NUMBER
)) {
280 if (IS_DEBUG_OSPF_EVENT
)
282 "LSA[Flooding]: Got a self-originated LSA, "
283 "while local one is initial instance.");
284 ; /* Accept this LSA for quick LSDB resynchronization.
286 } else if (monotime_since(¤t
->tv_recv
, NULL
)
287 < ospf
->min_ls_arrival
* 1000LL) {
288 if (IS_DEBUG_OSPF_EVENT
)
290 "LSA[Flooding]: LSA is received recently.");
295 /* Flood the new LSA out some subset of the router's interfaces.
296 In some cases (e.g., the state of the receiving interface is
297 DR and the LSA was received from a router other than the
298 Backup DR) the LSA will be flooded back out the receiving
300 lsa_ack_flag
= ospf_flood_through(ospf
, nbr
, new);
302 /* Remove the current database copy from all neighbors' Link state
303 retransmission lists. AS_EXTERNAL and AS_EXTERNAL_OPAQUE does
304 ^^^^^^^^^^^^^^^^^^^^^^^
306 All other (even NSSA's) do have area ID. */
308 switch (current
->data
->type
) {
309 case OSPF_AS_EXTERNAL_LSA
:
310 case OSPF_OPAQUE_AS_LSA
:
311 ospf_ls_retransmit_delete_nbr_as(ospf
, current
);
314 ospf_ls_retransmit_delete_nbr_area(nbr
->oi
->area
,
320 /* Do some internal house keeping that is needed here */
321 SET_FLAG(new->flags
, OSPF_LSA_RECEIVED
);
322 (void)ospf_lsa_is_self_originated(ospf
, new); /* Let it set the flag */
324 /* Install the new LSA in the link state database
325 (replacing the current database copy). This may cause the
326 routing table calculation to be scheduled. In addition,
327 timestamp the new LSA with the current time. The flooding
328 procedure cannot overwrite the newly installed LSA until
329 MinLSArrival seconds have elapsed. */
331 if (!(new = ospf_lsa_install(ospf
, nbr
->oi
, new)))
332 return -1; /* unknown LSA type or any other error condition */
334 /* Acknowledge the receipt of the LSA by sending a Link State
335 Acknowledgment packet back out the receiving interface. */
337 ospf_flood_delayed_lsa_ack(nbr
, new);
339 /* If this new LSA indicates that it was originated by the
340 receiving router itself, the router must take special action,
341 either updating the LSA or in some cases flushing it from
342 the routing domain. */
343 if (ospf_lsa_is_self_originated(ospf
, new))
344 ospf_process_self_originated_lsa(ospf
, new, oi
->area
);
346 /* Update statistics value for OSPF-MIB. */
347 ospf
->rx_lsa_count
++;
352 /* OSPF LSA flooding -- RFC2328 Section 13.3. */
353 static int ospf_flood_through_interface(struct ospf_interface
*oi
,
354 struct ospf_neighbor
*inbr
,
355 struct ospf_lsa
*lsa
)
357 struct ospf_neighbor
*onbr
;
358 struct route_node
*rn
;
361 if (IS_DEBUG_OSPF_EVENT
)
363 "ospf_flood_through_interface(): "
364 "considering int %s, INBR(%s), LSA[%s] AGE %u",
365 IF_NAME(oi
), inbr
? inet_ntoa(inbr
->router_id
) : "NULL",
366 dump_lsa_key(lsa
), ntohs(lsa
->data
->ls_age
));
368 if (!ospf_if_is_enable(oi
))
371 /* Remember if new LSA is aded to a retransmit list. */
374 /* Each of the neighbors attached to this interface are examined,
375 to determine whether they must receive the new LSA. The following
376 steps are executed for each neighbor: */
377 for (rn
= route_top(oi
->nbrs
); rn
; rn
= route_next(rn
)) {
378 struct ospf_lsa
*ls_req
;
380 if (rn
->info
== NULL
)
384 if (IS_DEBUG_OSPF_EVENT
)
386 "ospf_flood_through_interface(): considering nbr %s (%s)",
387 inet_ntoa(onbr
->router_id
),
388 lookup_msg(ospf_nsm_state_msg
, onbr
->state
,
391 /* If the neighbor is in a lesser state than Exchange, it
392 does not participate in flooding, and the next neighbor
393 should be examined. */
394 if (onbr
->state
< NSM_Exchange
)
397 /* If the adjacency is not yet full (neighbor state is
398 Exchange or Loading), examine the Link state request
399 list associated with this adjacency. If there is an
400 instance of the new LSA on the list, it indicates that
401 the neighboring router has an instance of the LSA
402 already. Compare the new LSA to the neighbor's copy: */
403 if (onbr
->state
< NSM_Full
) {
404 if (IS_DEBUG_OSPF_EVENT
)
406 "ospf_flood_through_interface(): nbr adj is not Full");
407 ls_req
= ospf_ls_request_lookup(onbr
, lsa
);
408 if (ls_req
!= NULL
) {
411 ret
= ospf_lsa_more_recent(ls_req
, lsa
);
412 /* The new LSA is less recent. */
415 /* The two copies are the same instance, then
417 the LSA from the Link state request list. */
419 ospf_ls_request_delete(onbr
, ls_req
);
420 ospf_check_nbr_loading(onbr
);
423 /* The new LSA is more recent. Delete the LSA
424 from the Link state request list. */
426 ospf_ls_request_delete(onbr
, ls_req
);
427 ospf_check_nbr_loading(onbr
);
432 if (IS_OPAQUE_LSA(lsa
->data
->type
)) {
433 if (!CHECK_FLAG(onbr
->options
, OSPF_OPTION_O
)) {
434 if (IS_DEBUG_OSPF(lsa
, LSA_FLOODING
))
436 "Skip this neighbor: Not Opaque-capable.");
441 /* If the new LSA was received from this neighbor,
442 examine the next neighbor. */
443 #ifdef ORIGINAL_CODING
445 if (IPV4_ADDR_SAME(&inbr
->router_id
, &onbr
->router_id
))
447 #else /* ORIGINAL_CODING */
450 * Triggered by LSUpd message parser "ospf_ls_upd ()".
451 * E.g., all LSAs handling here is received via network.
453 if (IPV4_ADDR_SAME(&inbr
->router_id
,
455 if (IS_DEBUG_OSPF(lsa
, LSA_FLOODING
))
457 "Skip this neighbor: inbr == onbr");
462 * Triggered by MaxAge remover, so far.
463 * NULL "inbr" means flooding starts from this node.
465 if (IPV4_ADDR_SAME(&lsa
->data
->adv_router
,
467 if (IS_DEBUG_OSPF(lsa
, LSA_FLOODING
))
469 "Skip this neighbor: lsah->adv_router == onbr");
473 #endif /* ORIGINAL_CODING */
475 /* Add the new LSA to the Link state retransmission list
476 for the adjacency. The LSA will be retransmitted
477 at intervals until an acknowledgment is seen from
479 ospf_ls_retransmit_add(onbr
, lsa
);
483 /* If in the previous step, the LSA was NOT added to any of
484 the Link state retransmission lists, there is no need to
485 flood the LSA out the interface. */
486 if (retx_flag
== 0) {
487 return (inbr
&& inbr
->oi
== oi
);
490 /* if we've received the lsa on this interface we need to perform
491 additional checking */
492 if (inbr
&& (inbr
->oi
== oi
)) {
493 /* If the new LSA was received on this interface, and it was
494 received from either the Designated Router or the Backup
495 Designated Router, chances are that all the neighbors have
496 received the LSA already. */
497 if (NBR_IS_DR(inbr
) || NBR_IS_BDR(inbr
)) {
498 if (IS_DEBUG_OSPF_NSSA
)
500 "ospf_flood_through_interface(): "
501 "DR/BDR NOT SEND to int %s",
506 /* If the new LSA was received on this interface, and the
507 interface state is Backup, examine the next interface. The
508 Designated Router will do the flooding on this interface.
509 However, if the Designated Router fails the router will
510 end up retransmitting the updates. */
512 if (oi
->state
== ISM_Backup
) {
513 if (IS_DEBUG_OSPF_NSSA
)
515 "ospf_flood_through_interface(): "
516 "ISM_Backup NOT SEND to int %s",
522 /* The LSA must be flooded out the interface. Send a Link State
523 Update packet (including the new LSA as contents) out the
524 interface. The LSA's LS age must be incremented by InfTransDelay
525 (which must be > 0) when it is copied into the outgoing Link
526 State Update packet (until the LS age field reaches the maximum
528 /* XXX HASSO: Is this IS_DEBUG_OSPF_NSSA really correct? */
529 if (IS_DEBUG_OSPF_NSSA
)
531 "ospf_flood_through_interface(): "
532 "DR/BDR sending upd to int %s",
535 /* RFC2328 Section 13.3
536 On non-broadcast networks, separate Link State Update
537 packets must be sent, as unicasts, to each adjacent neighbor
538 (i.e., those in state Exchange or greater). The destination
539 IP addresses for these packets are the neighbors' IP
541 if (oi
->type
== OSPF_IFTYPE_NBMA
) {
542 struct ospf_neighbor
*nbr
;
544 for (rn
= route_top(oi
->nbrs
); rn
; rn
= route_next(rn
))
545 if ((nbr
= rn
->info
) != NULL
)
546 if (nbr
!= oi
->nbr_self
547 && nbr
->state
>= NSM_Exchange
)
548 ospf_ls_upd_send_lsa(
550 OSPF_SEND_PACKET_DIRECT
);
552 ospf_ls_upd_send_lsa(oi
->nbr_self
, lsa
,
553 OSPF_SEND_PACKET_INDIRECT
);
558 int ospf_flood_through_area(struct ospf_area
*area
, struct ospf_neighbor
*inbr
,
559 struct ospf_lsa
*lsa
)
561 struct listnode
*node
, *nnode
;
562 struct ospf_interface
*oi
;
563 int lsa_ack_flag
= 0;
566 /* All other types are specific to a single area (Area A). The
567 eligible interfaces are all those interfaces attaching to the
568 Area A. If Area A is the backbone, this includes all the virtual
570 for (ALL_LIST_ELEMENTS(area
->oiflist
, node
, nnode
, oi
)) {
571 if (area
->area_id
.s_addr
!= OSPF_AREA_BACKBONE
572 && oi
->type
== OSPF_IFTYPE_VIRTUALLINK
)
575 if ((lsa
->data
->type
== OSPF_OPAQUE_LINK_LSA
)
576 && (lsa
->oi
!= oi
)) {
578 * Link local scoped Opaque-LSA should only be flooded
579 * for the link on which the LSA has received.
581 if (IS_DEBUG_OSPF(lsa
, LSA_FLOODING
))
583 "Type-9 Opaque-LSA: lsa->oi(%p) != oi(%p)",
584 (void *)lsa
->oi
, (void *)oi
);
588 if (ospf_flood_through_interface(oi
, inbr
, lsa
))
592 return (lsa_ack_flag
);
595 int ospf_flood_through_as(struct ospf
*ospf
, struct ospf_neighbor
*inbr
,
596 struct ospf_lsa
*lsa
)
598 struct listnode
*node
;
599 struct ospf_area
*area
;
604 /* The incoming LSA is type 5 or type 7 (AS-EXTERNAL or AS-NSSA )
606 Divert the Type-5 LSA's to all non-NSSA/STUB areas
608 Divert the Type-7 LSA's to all NSSA areas
610 AS-external-LSAs are flooded throughout the entire AS, with the
611 exception of stub areas (see Section 3.6). The eligible
612 interfaces are all the router's interfaces, excluding virtual
613 links and those interfaces attaching to stub areas. */
615 if (CHECK_FLAG(lsa
->flags
, OSPF_LSA_LOCAL_XLT
)) /* Translated from 7 */
616 if (IS_DEBUG_OSPF_NSSA
)
617 zlog_debug("Flood/AS: NSSA TRANSLATED LSA");
619 for (ALL_LIST_ELEMENTS_RO(ospf
->areas
, node
, area
)) {
620 int continue_flag
= 0;
621 struct listnode
*if_node
;
622 struct ospf_interface
*oi
;
624 switch (area
->external_routing
) {
625 /* Don't send AS externals into stub areas. Various types
626 of support for partial stub areas can be implemented
627 here. NSSA's will receive Type-7's that have areas
628 matching the originl LSA. */
629 case OSPF_AREA_NSSA
: /* Sending Type 5 or 7 into NSSA area */
630 /* Type-7, flood NSSA area */
631 if (lsa
->data
->type
== OSPF_AS_NSSA_LSA
632 && area
== lsa
->area
)
633 /* We will send it. */
636 continue_flag
= 1; /* Skip this NSSA area for
640 case OSPF_AREA_TYPE_MAX
:
642 continue_flag
= 1; /* Skip this area. */
645 case OSPF_AREA_DEFAULT
:
647 /* No Type-7 into normal area */
648 if (lsa
->data
->type
== OSPF_AS_NSSA_LSA
)
649 continue_flag
= 1; /* skip Type-7 */
651 continue_flag
= 0; /* Do this area. */
655 /* Do continue for above switch. Saves a big if then mess */
657 continue; /* main for-loop */
659 /* send to every interface in this area */
661 for (ALL_LIST_ELEMENTS_RO(area
->oiflist
, if_node
, oi
)) {
662 /* Skip virtual links */
663 if (oi
->type
!= OSPF_IFTYPE_VIRTUALLINK
)
664 if (ospf_flood_through_interface(oi
, inbr
,
668 } /* main area for-loop */
670 return (lsa_ack_flag
);
673 int ospf_flood_through(struct ospf
*ospf
, struct ospf_neighbor
*inbr
,
674 struct ospf_lsa
*lsa
)
676 int lsa_ack_flag
= 0;
678 /* Type-7 LSA's for NSSA are flooded throughout the AS here, and
679 upon return are updated in the LSDB for Type-7's. Later,
680 re-fresh will re-send them (and also, if ABR, packet code will
681 translate to Type-5's)
683 As usual, Type-5 LSA's (if not DISCARDED because we are STUB or
684 NSSA) are flooded throughout the AS, and are updated in the
686 #ifdef ORIGINAL_CODING
687 switch (lsa
->data
->type
) {
688 case OSPF_ROUTER_LSA
:
689 case OSPF_NETWORK_LSA
:
690 case OSPF_SUMMARY_LSA
:
691 case OSPF_ASBR_SUMMARY_LSA
:
692 case OSPF_OPAQUE_LINK_LSA
: /* ospf_flood_through_interface ? */
693 case OSPF_OPAQUE_AREA_LSA
:
695 ospf_flood_through_area(inbr
->oi
->area
, inbr
, lsa
);
697 case OSPF_AS_EXTERNAL_LSA
: /* Type-5 */
698 case OSPF_OPAQUE_AS_LSA
:
699 lsa_ack_flag
= ospf_flood_through_as(ospf
, inbr
, lsa
);
701 /* Type-7 Only received within NSSA, then flooded */
702 case OSPF_AS_NSSA_LSA
:
703 /* Any P-bit was installed with the Type-7. */
705 ospf_flood_through_area(inbr
->oi
->area
, inbr
, lsa
);
707 if (IS_DEBUG_OSPF_NSSA
)
709 "ospf_flood_through: LOCAL NSSA FLOOD of Type-7.");
714 #else /* ORIGINAL_CODING */
716 * At the common sub-sub-function "ospf_flood_through_interface()",
717 * a parameter "inbr" will be used to distinguish the called context
718 * whether the given LSA was received from the neighbor, or the
719 * flooding for the LSA starts from this node (e.g. the LSA was self-
720 * originated, or the LSA is going to be flushed from routing domain).
722 * So, for consistency reasons, this function "ospf_flood_through()"
723 * should also allow the usage that the given "inbr" parameter to be
724 * NULL. If we do so, corresponding AREA parameter should be referred
725 * by "lsa->area", instead of "inbr->oi->area".
727 switch (lsa
->data
->type
) {
728 case OSPF_AS_EXTERNAL_LSA
: /* Type-5 */
729 case OSPF_OPAQUE_AS_LSA
:
730 lsa_ack_flag
= ospf_flood_through_as(ospf
, inbr
, lsa
);
732 /* Type-7 Only received within NSSA, then flooded */
733 case OSPF_AS_NSSA_LSA
:
734 /* Any P-bit was installed with the Type-7. */
736 if (IS_DEBUG_OSPF_NSSA
)
738 "ospf_flood_through: LOCAL NSSA FLOOD of Type-7.");
741 lsa_ack_flag
= ospf_flood_through_area(lsa
->area
, inbr
, lsa
);
744 #endif /* ORIGINAL_CODING */
746 return (lsa_ack_flag
);
750 /* Management functions for neighbor's Link State Request list. */
751 void ospf_ls_request_add(struct ospf_neighbor
*nbr
, struct ospf_lsa
*lsa
)
754 * We cannot make use of the newly introduced callback function
755 * "lsdb->new_lsa_hook" to replace debug output below, just because
756 * it seems no simple and smart way to pass neighbor information to
757 * the common function "ospf_lsdb_add()" -- endo.
759 if (IS_DEBUG_OSPF(lsa
, LSA_FLOODING
))
760 zlog_debug("RqstL(%lu)++, NBR(%s), LSA[%s]",
761 ospf_ls_request_count(nbr
),
762 inet_ntoa(nbr
->router_id
), dump_lsa_key(lsa
));
764 ospf_lsdb_add(&nbr
->ls_req
, lsa
);
767 unsigned long ospf_ls_request_count(struct ospf_neighbor
*nbr
)
769 return ospf_lsdb_count_all(&nbr
->ls_req
);
772 int ospf_ls_request_isempty(struct ospf_neighbor
*nbr
)
774 return ospf_lsdb_isempty(&nbr
->ls_req
);
777 /* Remove LSA from neighbor's ls-request list. */
778 void ospf_ls_request_delete(struct ospf_neighbor
*nbr
, struct ospf_lsa
*lsa
)
780 if (nbr
->ls_req_last
== lsa
) {
781 ospf_lsa_unlock(&nbr
->ls_req_last
);
782 nbr
->ls_req_last
= NULL
;
785 if (IS_DEBUG_OSPF(lsa
, LSA_FLOODING
)) /* -- endo. */
786 zlog_debug("RqstL(%lu)--, NBR(%s), LSA[%s]",
787 ospf_ls_request_count(nbr
),
788 inet_ntoa(nbr
->router_id
), dump_lsa_key(lsa
));
790 ospf_lsdb_delete(&nbr
->ls_req
, lsa
);
793 /* Remove all LSA from neighbor's ls-requenst list. */
794 void ospf_ls_request_delete_all(struct ospf_neighbor
*nbr
)
796 ospf_lsa_unlock(&nbr
->ls_req_last
);
797 nbr
->ls_req_last
= NULL
;
798 ospf_lsdb_delete_all(&nbr
->ls_req
);
801 /* Lookup LSA from neighbor's ls-request list. */
802 struct ospf_lsa
*ospf_ls_request_lookup(struct ospf_neighbor
*nbr
,
803 struct ospf_lsa
*lsa
)
805 return ospf_lsdb_lookup(&nbr
->ls_req
, lsa
);
808 struct ospf_lsa
*ospf_ls_request_new(struct lsa_header
*lsah
)
810 struct ospf_lsa
*new;
812 new = ospf_lsa_new_and_data(OSPF_LSA_HEADER_SIZE
);
813 memcpy(new->data
, lsah
, OSPF_LSA_HEADER_SIZE
);
819 /* Management functions for neighbor's ls-retransmit list. */
820 unsigned long ospf_ls_retransmit_count(struct ospf_neighbor
*nbr
)
822 return ospf_lsdb_count_all(&nbr
->ls_rxmt
);
825 unsigned long ospf_ls_retransmit_count_self(struct ospf_neighbor
*nbr
,
828 return ospf_lsdb_count_self(&nbr
->ls_rxmt
, lsa_type
);
831 int ospf_ls_retransmit_isempty(struct ospf_neighbor
*nbr
)
833 return ospf_lsdb_isempty(&nbr
->ls_rxmt
);
836 /* Add LSA to be retransmitted to neighbor's ls-retransmit list. */
837 void ospf_ls_retransmit_add(struct ospf_neighbor
*nbr
, struct ospf_lsa
*lsa
)
839 struct ospf_lsa
*old
;
841 old
= ospf_ls_retransmit_lookup(nbr
, lsa
);
843 if (ospf_lsa_more_recent(old
, lsa
) < 0) {
845 old
->retransmit_counter
--;
846 ospf_lsdb_delete(&nbr
->ls_rxmt
, old
);
848 lsa
->retransmit_counter
++;
850 * We cannot make use of the newly introduced callback function
851 * "lsdb->new_lsa_hook" to replace debug output below, just
853 * it seems no simple and smart way to pass neighbor information
855 * the common function "ospf_lsdb_add()" -- endo.
857 if (IS_DEBUG_OSPF(lsa
, LSA_FLOODING
))
858 zlog_debug("RXmtL(%lu)++, NBR(%s), LSA[%s]",
859 ospf_ls_retransmit_count(nbr
),
860 inet_ntoa(nbr
->router_id
),
862 ospf_lsdb_add(&nbr
->ls_rxmt
, lsa
);
866 /* Remove LSA from neibghbor's ls-retransmit list. */
867 void ospf_ls_retransmit_delete(struct ospf_neighbor
*nbr
, struct ospf_lsa
*lsa
)
869 if (ospf_ls_retransmit_lookup(nbr
, lsa
)) {
870 lsa
->retransmit_counter
--;
871 if (IS_DEBUG_OSPF(lsa
, LSA_FLOODING
)) /* -- endo. */
872 zlog_debug("RXmtL(%lu)--, NBR(%s), LSA[%s]",
873 ospf_ls_retransmit_count(nbr
),
874 inet_ntoa(nbr
->router_id
),
876 ospf_lsdb_delete(&nbr
->ls_rxmt
, lsa
);
880 /* Clear neighbor's ls-retransmit list. */
881 void ospf_ls_retransmit_clear(struct ospf_neighbor
*nbr
)
883 struct ospf_lsdb
*lsdb
;
886 lsdb
= &nbr
->ls_rxmt
;
888 for (i
= OSPF_MIN_LSA
; i
< OSPF_MAX_LSA
; i
++) {
889 struct route_table
*table
= lsdb
->type
[i
].db
;
890 struct route_node
*rn
;
891 struct ospf_lsa
*lsa
;
893 for (rn
= route_top(table
); rn
; rn
= route_next(rn
))
894 if ((lsa
= rn
->info
) != NULL
)
895 ospf_ls_retransmit_delete(nbr
, lsa
);
898 ospf_lsa_unlock(&nbr
->ls_req_last
);
899 nbr
->ls_req_last
= NULL
;
902 /* Lookup LSA from neighbor's ls-retransmit list. */
903 struct ospf_lsa
*ospf_ls_retransmit_lookup(struct ospf_neighbor
*nbr
,
904 struct ospf_lsa
*lsa
)
906 return ospf_lsdb_lookup(&nbr
->ls_rxmt
, lsa
);
909 static void ospf_ls_retransmit_delete_nbr_if(struct ospf_interface
*oi
,
910 struct ospf_lsa
*lsa
)
912 struct route_node
*rn
;
913 struct ospf_neighbor
*nbr
;
914 struct ospf_lsa
*lsr
;
916 if (ospf_if_is_enable(oi
))
917 for (rn
= route_top(oi
->nbrs
); rn
; rn
= route_next(rn
))
918 /* If LSA find in LS-retransmit list, then remove it. */
919 if ((nbr
= rn
->info
) != NULL
) {
920 lsr
= ospf_ls_retransmit_lookup(nbr
, lsa
);
922 /* If LSA find in ls-retransmit list, remove it.
925 && lsr
->data
->ls_seqnum
926 == lsa
->data
->ls_seqnum
)
927 ospf_ls_retransmit_delete(nbr
, lsr
);
931 void ospf_ls_retransmit_delete_nbr_area(struct ospf_area
*area
,
932 struct ospf_lsa
*lsa
)
934 struct listnode
*node
, *nnode
;
935 struct ospf_interface
*oi
;
937 for (ALL_LIST_ELEMENTS(area
->oiflist
, node
, nnode
, oi
))
938 ospf_ls_retransmit_delete_nbr_if(oi
, lsa
);
941 void ospf_ls_retransmit_delete_nbr_as(struct ospf
*ospf
, struct ospf_lsa
*lsa
)
943 struct listnode
*node
, *nnode
;
944 struct ospf_interface
*oi
;
946 for (ALL_LIST_ELEMENTS(ospf
->oiflist
, node
, nnode
, oi
))
947 ospf_ls_retransmit_delete_nbr_if(oi
, lsa
);
951 /* Sets ls_age to MaxAge and floods throu the area.
952 When we implement ASE routing, there will be anothe function
953 flushing an LSA from the whole domain. */
954 void ospf_lsa_flush_area(struct ospf_lsa
*lsa
, struct ospf_area
*area
)
956 /* Reset the lsa origination time such that it gives
957 more time for the ACK to be received and avoid
959 lsa
->data
->ls_age
= htons(OSPF_LSA_MAXAGE
);
960 if (IS_DEBUG_OSPF_EVENT
)
961 zlog_debug("%s: MAXAGE set to LSA %s", __PRETTY_FUNCTION__
,
962 inet_ntoa(lsa
->data
->id
));
963 monotime(&lsa
->tv_recv
);
964 lsa
->tv_orig
= lsa
->tv_recv
;
965 ospf_flood_through_area(area
, NULL
, lsa
);
966 ospf_lsa_maxage(area
->ospf
, lsa
);
969 void ospf_lsa_flush_as(struct ospf
*ospf
, struct ospf_lsa
*lsa
)
971 /* Reset the lsa origination time such that it gives
972 more time for the ACK to be received and avoid
974 lsa
->data
->ls_age
= htons(OSPF_LSA_MAXAGE
);
975 monotime(&lsa
->tv_recv
);
976 lsa
->tv_orig
= lsa
->tv_recv
;
977 ospf_flood_through_as(ospf
, NULL
, lsa
);
978 ospf_lsa_maxage(ospf
, lsa
);
981 void ospf_lsa_flush(struct ospf
*ospf
, struct ospf_lsa
*lsa
)
983 lsa
->data
->ls_age
= htons(OSPF_LSA_MAXAGE
);
985 switch (lsa
->data
->type
) {
986 case OSPF_ROUTER_LSA
:
987 case OSPF_NETWORK_LSA
:
988 case OSPF_SUMMARY_LSA
:
989 case OSPF_ASBR_SUMMARY_LSA
:
990 case OSPF_AS_NSSA_LSA
:
991 case OSPF_OPAQUE_LINK_LSA
:
992 case OSPF_OPAQUE_AREA_LSA
:
993 ospf_lsa_flush_area(lsa
, lsa
->area
);
995 case OSPF_AS_EXTERNAL_LSA
:
996 case OSPF_OPAQUE_AS_LSA
:
997 ospf_lsa_flush_as(ospf
, lsa
);
1000 zlog_info("%s: Unknown LSA type %u", __func__
, lsa
->data
->type
);