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
++) {
100 zclient
->default_information
[AFI_IP
],
102 : (zclient
->mi_redist
[AFI_IP
][type
].enabled
104 zclient
->redist
[AFI_IP
][type
],
106 // Pending: check for MI above.
108 struct list
*ext_list
;
109 struct listnode
*node
;
110 struct ospf_external
*ext
;
112 ext_list
= ospf
->external
[type
];
116 for (ALL_LIST_ELEMENTS_RO(ext_list
, node
, ext
)) {
118 if (ext
->external_info
)
119 rn
= route_node_lookup(
121 (struct prefix
*)&p
);
123 route_unlock_node(rn
);
124 if (rn
->info
!= NULL
)
125 return (struct external_info
*)
135 static void ospf_process_self_originated_lsa(struct ospf
*ospf
,
136 struct ospf_lsa
*new,
137 struct ospf_area
*area
)
139 struct ospf_interface
*oi
;
140 struct external_info
*ei
;
141 struct listnode
*node
;
143 if (IS_DEBUG_OSPF_EVENT
)
145 "LSA[Type%d:%s]: Process self-originated LSA seq 0x%x",
146 new->data
->type
, inet_ntoa(new->data
->id
),
147 ntohl(new->data
->ls_seqnum
));
149 /* If we're here, we installed a self-originated LSA that we received
150 from a neighbor, i.e. it's more recent. We must see whether we want
152 If yes, we should use this LSA's sequence number and reoriginate
154 if not --- we must flush this LSA from the domain. */
155 switch (new->data
->type
) {
156 case OSPF_ROUTER_LSA
:
157 /* Originate a new instance and schedule flooding */
158 if (area
->router_lsa_self
)
159 area
->router_lsa_self
->data
->ls_seqnum
=
160 new->data
->ls_seqnum
;
161 ospf_router_lsa_update_area(area
);
163 case OSPF_NETWORK_LSA
:
164 case OSPF_OPAQUE_LINK_LSA
:
165 /* We must find the interface the LSA could belong to.
166 If the interface is no more a broadcast type or we are no
168 the DR, we flush the LSA otherwise -- create the new instance
170 schedule flooding. */
172 /* Look through all interfaces, not just area, since interface
173 could be moved from one area to another. */
174 for (ALL_LIST_ELEMENTS_RO(ospf
->oiflist
, node
, oi
))
175 /* These are sanity check. */
176 if (IPV4_ADDR_SAME(&oi
->address
->u
.prefix4
,
179 || oi
->type
!= OSPF_IFTYPE_BROADCAST
180 || !IPV4_ADDR_SAME(&oi
->address
->u
.prefix4
,
182 ospf_schedule_lsa_flush_area(area
, new);
186 if (new->data
->type
== OSPF_OPAQUE_LINK_LSA
) {
187 ospf_opaque_lsa_refresh(new);
191 if (oi
->network_lsa_self
)
192 oi
->network_lsa_self
->data
->ls_seqnum
=
193 new->data
->ls_seqnum
;
194 /* Schedule network-LSA origination. */
195 ospf_network_lsa_update(oi
);
199 case OSPF_SUMMARY_LSA
:
200 case OSPF_ASBR_SUMMARY_LSA
:
201 ospf_schedule_abr_task(ospf
);
203 case OSPF_AS_EXTERNAL_LSA
:
204 case OSPF_AS_NSSA_LSA
:
205 if ((new->data
->type
== OSPF_AS_EXTERNAL_LSA
)
206 && CHECK_FLAG(new->flags
, OSPF_LSA_LOCAL_XLT
)) {
207 ospf_translated_nssa_refresh(ospf
, NULL
, new);
210 ei
= ospf_external_info_check(ospf
, new);
212 ospf_external_lsa_refresh(ospf
, new, ei
,
215 ospf_lsa_flush_as(ospf
, new);
217 case OSPF_OPAQUE_AREA_LSA
:
218 ospf_opaque_lsa_refresh(new);
220 case OSPF_OPAQUE_AS_LSA
:
221 ospf_opaque_lsa_refresh(new);
222 /* Reconsideration may needed. */ /* XXX */
229 /* OSPF LSA flooding -- RFC2328 Section 13.(5). */
231 /* Now Updated for NSSA operation, as follows:
234 Type-5's have no change. Blocked to STUB or NSSA.
236 Type-7's can be received, and if a DR
237 they will also flood the local NSSA Area as Type-7's
239 If a Self-Originated LSA (now an ASBR),
240 The LSDB will be updated as Type-5's, (for continual re-fresh)
242 If an NSSA-IR it is installed/flooded as Type-7, P-bit on.
243 if an NSSA-ABR it is installed/flooded as Type-7, P-bit off.
245 Later, during the ABR TASK, if the ABR is the Elected NSSA
246 translator, then All Type-7s (with P-bit ON) are Translated to
247 Type-5's and flooded to all non-NSSA/STUB areas.
249 During ASE Calculations,
250 non-ABRs calculate external routes from Type-7's
251 ABRs calculate external routes from Type-5's and non-self Type-7s
253 int ospf_flood(struct ospf
*ospf
, struct ospf_neighbor
*nbr
,
254 struct ospf_lsa
*current
, struct ospf_lsa
*new)
256 struct ospf_interface
*oi
;
259 /* Type-7 LSA's will be flooded throughout their native NSSA area,
260 but will also be flooded as Type-5's into ABR capable links. */
262 if (IS_DEBUG_OSPF_EVENT
)
264 "LSA[Flooding]: start, NBR %s (%s), cur(%p), New-LSA[%s]",
265 inet_ntoa(nbr
->router_id
),
266 lookup_msg(ospf_nsm_state_msg
, nbr
->state
, NULL
),
267 (void *)current
, dump_lsa_key(new));
271 /* If there is already a database copy, and if the
272 database copy was received via flooding and installed less
273 than MinLSArrival seconds ago, discard the new LSA
274 (without acknowledging it). */
275 if (current
!= NULL
) /* -- endo. */
277 if (IS_LSA_SELF(current
)
278 && (ntohs(current
->data
->ls_age
) == 0
279 && ntohl(current
->data
->ls_seqnum
)
280 == OSPF_INITIAL_SEQUENCE_NUMBER
)) {
281 if (IS_DEBUG_OSPF_EVENT
)
283 "LSA[Flooding]: Got a self-originated LSA, "
284 "while local one is initial instance.");
285 ; /* Accept this LSA for quick LSDB resynchronization.
287 } else if (monotime_since(¤t
->tv_recv
, NULL
)
288 < ospf
->min_ls_arrival
* 1000LL) {
289 if (IS_DEBUG_OSPF_EVENT
)
291 "LSA[Flooding]: LSA is received recently.");
296 /* Flood the new LSA out some subset of the router's interfaces.
297 In some cases (e.g., the state of the receiving interface is
298 DR and the LSA was received from a router other than the
299 Backup DR) the LSA will be flooded back out the receiving
301 lsa_ack_flag
= ospf_flood_through(ospf
, nbr
, new);
303 /* Remove the current database copy from all neighbors' Link state
304 retransmission lists. AS_EXTERNAL and AS_EXTERNAL_OPAQUE does
305 ^^^^^^^^^^^^^^^^^^^^^^^
307 All other (even NSSA's) do have area ID. */
309 switch (current
->data
->type
) {
310 case OSPF_AS_EXTERNAL_LSA
:
311 case OSPF_OPAQUE_AS_LSA
:
312 ospf_ls_retransmit_delete_nbr_as(ospf
, current
);
315 ospf_ls_retransmit_delete_nbr_area(nbr
->oi
->area
,
321 /* Do some internal house keeping that is needed here */
322 SET_FLAG(new->flags
, OSPF_LSA_RECEIVED
);
323 (void)ospf_lsa_is_self_originated(ospf
, new); /* Let it set the flag */
325 /* Install the new LSA in the link state database
326 (replacing the current database copy). This may cause the
327 routing table calculation to be scheduled. In addition,
328 timestamp the new LSA with the current time. The flooding
329 procedure cannot overwrite the newly installed LSA until
330 MinLSArrival seconds have elapsed. */
332 if (!(new = ospf_lsa_install(ospf
, nbr
->oi
, new)))
333 return -1; /* unknown LSA type or any other error condition */
335 /* Acknowledge the receipt of the LSA by sending a Link State
336 Acknowledgment packet back out the receiving interface. */
338 ospf_flood_delayed_lsa_ack(nbr
, new);
340 /* If this new LSA indicates that it was originated by the
341 receiving router itself, the router must take special action,
342 either updating the LSA or in some cases flushing it from
343 the routing domain. */
344 if (ospf_lsa_is_self_originated(ospf
, new))
345 ospf_process_self_originated_lsa(ospf
, new, oi
->area
);
347 /* Update statistics value for OSPF-MIB. */
348 ospf
->rx_lsa_count
++;
353 /* OSPF LSA flooding -- RFC2328 Section 13.3. */
354 static int ospf_flood_through_interface(struct ospf_interface
*oi
,
355 struct ospf_neighbor
*inbr
,
356 struct ospf_lsa
*lsa
)
358 struct ospf_neighbor
*onbr
;
359 struct route_node
*rn
;
362 if (IS_DEBUG_OSPF_EVENT
)
364 "ospf_flood_through_interface(): "
365 "considering int %s, INBR(%s), LSA[%s] AGE %u",
366 IF_NAME(oi
), inbr
? inet_ntoa(inbr
->router_id
) : "NULL",
367 dump_lsa_key(lsa
), ntohs(lsa
->data
->ls_age
));
369 if (!ospf_if_is_enable(oi
))
372 /* Remember if new LSA is aded to a retransmit list. */
375 /* Each of the neighbors attached to this interface are examined,
376 to determine whether they must receive the new LSA. The following
377 steps are executed for each neighbor: */
378 for (rn
= route_top(oi
->nbrs
); rn
; rn
= route_next(rn
)) {
379 struct ospf_lsa
*ls_req
;
381 if (rn
->info
== NULL
)
385 if (IS_DEBUG_OSPF_EVENT
)
387 "ospf_flood_through_interface(): considering nbr %s (%s)",
388 inet_ntoa(onbr
->router_id
),
389 lookup_msg(ospf_nsm_state_msg
, onbr
->state
,
392 /* If the neighbor is in a lesser state than Exchange, it
393 does not participate in flooding, and the next neighbor
394 should be examined. */
395 if (onbr
->state
< NSM_Exchange
)
398 /* If the adjacency is not yet full (neighbor state is
399 Exchange or Loading), examine the Link state request
400 list associated with this adjacency. If there is an
401 instance of the new LSA on the list, it indicates that
402 the neighboring router has an instance of the LSA
403 already. Compare the new LSA to the neighbor's copy: */
404 if (onbr
->state
< NSM_Full
) {
405 if (IS_DEBUG_OSPF_EVENT
)
407 "ospf_flood_through_interface(): nbr adj is not Full");
408 ls_req
= ospf_ls_request_lookup(onbr
, lsa
);
409 if (ls_req
!= NULL
) {
412 ret
= ospf_lsa_more_recent(ls_req
, lsa
);
413 /* The new LSA is less recent. */
416 /* The two copies are the same instance, then
418 the LSA from the Link state request list. */
420 ospf_ls_request_delete(onbr
, ls_req
);
421 ospf_check_nbr_loading(onbr
);
424 /* The new LSA is more recent. Delete the LSA
425 from the Link state request list. */
427 ospf_ls_request_delete(onbr
, ls_req
);
428 ospf_check_nbr_loading(onbr
);
433 if (IS_OPAQUE_LSA(lsa
->data
->type
)) {
434 if (!CHECK_FLAG(onbr
->options
, OSPF_OPTION_O
)) {
435 if (IS_DEBUG_OSPF(lsa
, LSA_FLOODING
))
437 "Skip this neighbor: Not Opaque-capable.");
442 /* If the new LSA was received from this neighbor,
443 examine the next neighbor. */
444 #ifdef ORIGINAL_CODING
446 if (IPV4_ADDR_SAME(&inbr
->router_id
, &onbr
->router_id
))
448 #else /* ORIGINAL_CODING */
451 * Triggered by LSUpd message parser "ospf_ls_upd ()".
452 * E.g., all LSAs handling here is received via network.
454 if (IPV4_ADDR_SAME(&inbr
->router_id
,
456 if (IS_DEBUG_OSPF(lsa
, LSA_FLOODING
))
458 "Skip this neighbor: inbr == onbr");
463 * Triggered by MaxAge remover, so far.
464 * NULL "inbr" means flooding starts from this node.
466 if (IPV4_ADDR_SAME(&lsa
->data
->adv_router
,
468 if (IS_DEBUG_OSPF(lsa
, LSA_FLOODING
))
470 "Skip this neighbor: lsah->adv_router == onbr");
474 #endif /* ORIGINAL_CODING */
476 /* Add the new LSA to the Link state retransmission list
477 for the adjacency. The LSA will be retransmitted
478 at intervals until an acknowledgment is seen from
480 ospf_ls_retransmit_add(onbr
, lsa
);
484 /* If in the previous step, the LSA was NOT added to any of
485 the Link state retransmission lists, there is no need to
486 flood the LSA out the interface. */
487 if (retx_flag
== 0) {
488 return (inbr
&& inbr
->oi
== oi
);
491 /* if we've received the lsa on this interface we need to perform
492 additional checking */
493 if (inbr
&& (inbr
->oi
== oi
)) {
494 /* If the new LSA was received on this interface, and it was
495 received from either the Designated Router or the Backup
496 Designated Router, chances are that all the neighbors have
497 received the LSA already. */
498 if (NBR_IS_DR(inbr
) || NBR_IS_BDR(inbr
)) {
499 if (IS_DEBUG_OSPF_NSSA
)
501 "ospf_flood_through_interface(): "
502 "DR/BDR NOT SEND to int %s",
507 /* If the new LSA was received on this interface, and the
508 interface state is Backup, examine the next interface. The
509 Designated Router will do the flooding on this interface.
510 However, if the Designated Router fails the router will
511 end up retransmitting the updates. */
513 if (oi
->state
== ISM_Backup
) {
514 if (IS_DEBUG_OSPF_NSSA
)
516 "ospf_flood_through_interface(): "
517 "ISM_Backup NOT SEND to int %s",
523 /* The LSA must be flooded out the interface. Send a Link State
524 Update packet (including the new LSA as contents) out the
525 interface. The LSA's LS age must be incremented by InfTransDelay
526 (which must be > 0) when it is copied into the outgoing Link
527 State Update packet (until the LS age field reaches the maximum
529 /* XXX HASSO: Is this IS_DEBUG_OSPF_NSSA really correct? */
530 if (IS_DEBUG_OSPF_NSSA
)
532 "ospf_flood_through_interface(): "
533 "DR/BDR sending upd to int %s",
536 /* RFC2328 Section 13.3
537 On non-broadcast networks, separate Link State Update
538 packets must be sent, as unicasts, to each adjacent neighbor
539 (i.e., those in state Exchange or greater). The destination
540 IP addresses for these packets are the neighbors' IP
542 if (oi
->type
== OSPF_IFTYPE_NBMA
) {
543 struct ospf_neighbor
*nbr
;
545 for (rn
= route_top(oi
->nbrs
); rn
; rn
= route_next(rn
))
546 if ((nbr
= rn
->info
) != NULL
)
547 if (nbr
!= oi
->nbr_self
548 && nbr
->state
>= NSM_Exchange
)
549 ospf_ls_upd_send_lsa(
551 OSPF_SEND_PACKET_DIRECT
);
553 ospf_ls_upd_send_lsa(oi
->nbr_self
, lsa
,
554 OSPF_SEND_PACKET_INDIRECT
);
559 int ospf_flood_through_area(struct ospf_area
*area
, struct ospf_neighbor
*inbr
,
560 struct ospf_lsa
*lsa
)
562 struct listnode
*node
, *nnode
;
563 struct ospf_interface
*oi
;
564 int lsa_ack_flag
= 0;
567 /* All other types are specific to a single area (Area A). The
568 eligible interfaces are all those interfaces attaching to the
569 Area A. If Area A is the backbone, this includes all the virtual
571 for (ALL_LIST_ELEMENTS(area
->oiflist
, node
, nnode
, oi
)) {
572 if (area
->area_id
.s_addr
!= OSPF_AREA_BACKBONE
573 && oi
->type
== OSPF_IFTYPE_VIRTUALLINK
)
576 if ((lsa
->data
->type
== OSPF_OPAQUE_LINK_LSA
)
577 && (lsa
->oi
!= oi
)) {
579 * Link local scoped Opaque-LSA should only be flooded
580 * for the link on which the LSA has received.
582 if (IS_DEBUG_OSPF(lsa
, LSA_FLOODING
))
584 "Type-9 Opaque-LSA: lsa->oi(%p) != oi(%p)",
585 (void *)lsa
->oi
, (void *)oi
);
589 if (ospf_flood_through_interface(oi
, inbr
, lsa
))
593 return (lsa_ack_flag
);
596 int ospf_flood_through_as(struct ospf
*ospf
, struct ospf_neighbor
*inbr
,
597 struct ospf_lsa
*lsa
)
599 struct listnode
*node
;
600 struct ospf_area
*area
;
605 /* The incoming LSA is type 5 or type 7 (AS-EXTERNAL or AS-NSSA )
607 Divert the Type-5 LSA's to all non-NSSA/STUB areas
609 Divert the Type-7 LSA's to all NSSA areas
611 AS-external-LSAs are flooded throughout the entire AS, with the
612 exception of stub areas (see Section 3.6). The eligible
613 interfaces are all the router's interfaces, excluding virtual
614 links and those interfaces attaching to stub areas. */
616 if (CHECK_FLAG(lsa
->flags
, OSPF_LSA_LOCAL_XLT
)) /* Translated from 7 */
617 if (IS_DEBUG_OSPF_NSSA
)
618 zlog_debug("Flood/AS: NSSA TRANSLATED LSA");
620 for (ALL_LIST_ELEMENTS_RO(ospf
->areas
, node
, area
)) {
621 int continue_flag
= 0;
622 struct listnode
*if_node
;
623 struct ospf_interface
*oi
;
625 switch (area
->external_routing
) {
626 /* Don't send AS externals into stub areas. Various types
627 of support for partial stub areas can be implemented
628 here. NSSA's will receive Type-7's that have areas
629 matching the originl LSA. */
630 case OSPF_AREA_NSSA
: /* Sending Type 5 or 7 into NSSA area */
631 /* Type-7, flood NSSA area */
632 if (lsa
->data
->type
== OSPF_AS_NSSA_LSA
633 && area
== lsa
->area
)
634 /* We will send it. */
637 continue_flag
= 1; /* Skip this NSSA area for
641 case OSPF_AREA_TYPE_MAX
:
643 continue_flag
= 1; /* Skip this area. */
646 case OSPF_AREA_DEFAULT
:
648 /* No Type-7 into normal area */
649 if (lsa
->data
->type
== OSPF_AS_NSSA_LSA
)
650 continue_flag
= 1; /* skip Type-7 */
652 continue_flag
= 0; /* Do this area. */
656 /* Do continue for above switch. Saves a big if then mess */
658 continue; /* main for-loop */
660 /* send to every interface in this area */
662 for (ALL_LIST_ELEMENTS_RO(area
->oiflist
, if_node
, oi
)) {
663 /* Skip virtual links */
664 if (oi
->type
!= OSPF_IFTYPE_VIRTUALLINK
)
665 if (ospf_flood_through_interface(oi
, inbr
,
669 } /* main area for-loop */
671 return (lsa_ack_flag
);
674 int ospf_flood_through(struct ospf
*ospf
, struct ospf_neighbor
*inbr
,
675 struct ospf_lsa
*lsa
)
677 int lsa_ack_flag
= 0;
679 /* Type-7 LSA's for NSSA are flooded throughout the AS here, and
680 upon return are updated in the LSDB for Type-7's. Later,
681 re-fresh will re-send them (and also, if ABR, packet code will
682 translate to Type-5's)
684 As usual, Type-5 LSA's (if not DISCARDED because we are STUB or
685 NSSA) are flooded throughout the AS, and are updated in the
687 #ifdef ORIGINAL_CODING
688 switch (lsa
->data
->type
) {
689 case OSPF_ROUTER_LSA
:
690 case OSPF_NETWORK_LSA
:
691 case OSPF_SUMMARY_LSA
:
692 case OSPF_ASBR_SUMMARY_LSA
:
693 case OSPF_OPAQUE_LINK_LSA
: /* ospf_flood_through_interface ? */
694 case OSPF_OPAQUE_AREA_LSA
:
696 ospf_flood_through_area(inbr
->oi
->area
, inbr
, lsa
);
698 case OSPF_AS_EXTERNAL_LSA
: /* Type-5 */
699 case OSPF_OPAQUE_AS_LSA
:
700 lsa_ack_flag
= ospf_flood_through_as(ospf
, inbr
, lsa
);
702 /* Type-7 Only received within NSSA, then flooded */
703 case OSPF_AS_NSSA_LSA
:
704 /* Any P-bit was installed with the Type-7. */
706 ospf_flood_through_area(inbr
->oi
->area
, inbr
, lsa
);
708 if (IS_DEBUG_OSPF_NSSA
)
710 "ospf_flood_through: LOCAL NSSA FLOOD of Type-7.");
715 #else /* ORIGINAL_CODING */
717 * At the common sub-sub-function "ospf_flood_through_interface()",
718 * a parameter "inbr" will be used to distinguish the called context
719 * whether the given LSA was received from the neighbor, or the
720 * flooding for the LSA starts from this node (e.g. the LSA was self-
721 * originated, or the LSA is going to be flushed from routing domain).
723 * So, for consistency reasons, this function "ospf_flood_through()"
724 * should also allow the usage that the given "inbr" parameter to be
725 * NULL. If we do so, corresponding AREA parameter should be referred
726 * by "lsa->area", instead of "inbr->oi->area".
728 switch (lsa
->data
->type
) {
729 case OSPF_AS_EXTERNAL_LSA
: /* Type-5 */
730 case OSPF_OPAQUE_AS_LSA
:
731 lsa_ack_flag
= ospf_flood_through_as(ospf
, inbr
, lsa
);
733 /* Type-7 Only received within NSSA, then flooded */
734 case OSPF_AS_NSSA_LSA
:
735 /* Any P-bit was installed with the Type-7. */
737 if (IS_DEBUG_OSPF_NSSA
)
739 "ospf_flood_through: LOCAL NSSA FLOOD of Type-7.");
742 lsa_ack_flag
= ospf_flood_through_area(lsa
->area
, inbr
, lsa
);
745 #endif /* ORIGINAL_CODING */
747 return (lsa_ack_flag
);
751 /* Management functions for neighbor's Link State Request list. */
752 void ospf_ls_request_add(struct ospf_neighbor
*nbr
, struct ospf_lsa
*lsa
)
755 * We cannot make use of the newly introduced callback function
756 * "lsdb->new_lsa_hook" to replace debug output below, just because
757 * it seems no simple and smart way to pass neighbor information to
758 * the common function "ospf_lsdb_add()" -- endo.
760 if (IS_DEBUG_OSPF(lsa
, LSA_FLOODING
))
761 zlog_debug("RqstL(%lu)++, NBR(%s), LSA[%s]",
762 ospf_ls_request_count(nbr
),
763 inet_ntoa(nbr
->router_id
), dump_lsa_key(lsa
));
765 ospf_lsdb_add(&nbr
->ls_req
, lsa
);
768 unsigned long ospf_ls_request_count(struct ospf_neighbor
*nbr
)
770 return ospf_lsdb_count_all(&nbr
->ls_req
);
773 int ospf_ls_request_isempty(struct ospf_neighbor
*nbr
)
775 return ospf_lsdb_isempty(&nbr
->ls_req
);
778 /* Remove LSA from neighbor's ls-request list. */
779 void ospf_ls_request_delete(struct ospf_neighbor
*nbr
, struct ospf_lsa
*lsa
)
781 if (nbr
->ls_req_last
== lsa
) {
782 ospf_lsa_unlock(&nbr
->ls_req_last
);
783 nbr
->ls_req_last
= NULL
;
786 if (IS_DEBUG_OSPF(lsa
, LSA_FLOODING
)) /* -- endo. */
787 zlog_debug("RqstL(%lu)--, NBR(%s), LSA[%s]",
788 ospf_ls_request_count(nbr
),
789 inet_ntoa(nbr
->router_id
), dump_lsa_key(lsa
));
791 ospf_lsdb_delete(&nbr
->ls_req
, lsa
);
794 /* Remove all LSA from neighbor's ls-requenst list. */
795 void ospf_ls_request_delete_all(struct ospf_neighbor
*nbr
)
797 ospf_lsa_unlock(&nbr
->ls_req_last
);
798 nbr
->ls_req_last
= NULL
;
799 ospf_lsdb_delete_all(&nbr
->ls_req
);
802 /* Lookup LSA from neighbor's ls-request list. */
803 struct ospf_lsa
*ospf_ls_request_lookup(struct ospf_neighbor
*nbr
,
804 struct ospf_lsa
*lsa
)
806 return ospf_lsdb_lookup(&nbr
->ls_req
, lsa
);
809 struct ospf_lsa
*ospf_ls_request_new(struct lsa_header
*lsah
)
811 struct ospf_lsa
*new;
813 new = ospf_lsa_new_and_data(OSPF_LSA_HEADER_SIZE
);
814 memcpy(new->data
, lsah
, OSPF_LSA_HEADER_SIZE
);
820 /* Management functions for neighbor's ls-retransmit list. */
821 unsigned long ospf_ls_retransmit_count(struct ospf_neighbor
*nbr
)
823 return ospf_lsdb_count_all(&nbr
->ls_rxmt
);
826 unsigned long ospf_ls_retransmit_count_self(struct ospf_neighbor
*nbr
,
829 return ospf_lsdb_count_self(&nbr
->ls_rxmt
, lsa_type
);
832 int ospf_ls_retransmit_isempty(struct ospf_neighbor
*nbr
)
834 return ospf_lsdb_isempty(&nbr
->ls_rxmt
);
837 /* Add LSA to be retransmitted to neighbor's ls-retransmit list. */
838 void ospf_ls_retransmit_add(struct ospf_neighbor
*nbr
, struct ospf_lsa
*lsa
)
840 struct ospf_lsa
*old
;
842 old
= ospf_ls_retransmit_lookup(nbr
, lsa
);
844 if (ospf_lsa_more_recent(old
, lsa
) < 0) {
846 old
->retransmit_counter
--;
847 ospf_lsdb_delete(&nbr
->ls_rxmt
, old
);
849 lsa
->retransmit_counter
++;
851 * We cannot make use of the newly introduced callback function
852 * "lsdb->new_lsa_hook" to replace debug output below, just
854 * it seems no simple and smart way to pass neighbor information
856 * the common function "ospf_lsdb_add()" -- endo.
858 if (IS_DEBUG_OSPF(lsa
, LSA_FLOODING
))
859 zlog_debug("RXmtL(%lu)++, NBR(%s), LSA[%s]",
860 ospf_ls_retransmit_count(nbr
),
861 inet_ntoa(nbr
->router_id
),
863 ospf_lsdb_add(&nbr
->ls_rxmt
, lsa
);
867 /* Remove LSA from neibghbor's ls-retransmit list. */
868 void ospf_ls_retransmit_delete(struct ospf_neighbor
*nbr
, struct ospf_lsa
*lsa
)
870 if (ospf_ls_retransmit_lookup(nbr
, lsa
)) {
871 lsa
->retransmit_counter
--;
872 if (IS_DEBUG_OSPF(lsa
, LSA_FLOODING
)) /* -- endo. */
873 zlog_debug("RXmtL(%lu)--, NBR(%s), LSA[%s]",
874 ospf_ls_retransmit_count(nbr
),
875 inet_ntoa(nbr
->router_id
),
877 ospf_lsdb_delete(&nbr
->ls_rxmt
, lsa
);
881 /* Clear neighbor's ls-retransmit list. */
882 void ospf_ls_retransmit_clear(struct ospf_neighbor
*nbr
)
884 struct ospf_lsdb
*lsdb
;
887 lsdb
= &nbr
->ls_rxmt
;
889 for (i
= OSPF_MIN_LSA
; i
< OSPF_MAX_LSA
; i
++) {
890 struct route_table
*table
= lsdb
->type
[i
].db
;
891 struct route_node
*rn
;
892 struct ospf_lsa
*lsa
;
894 for (rn
= route_top(table
); rn
; rn
= route_next(rn
))
895 if ((lsa
= rn
->info
) != NULL
)
896 ospf_ls_retransmit_delete(nbr
, lsa
);
899 ospf_lsa_unlock(&nbr
->ls_req_last
);
900 nbr
->ls_req_last
= NULL
;
903 /* Lookup LSA from neighbor's ls-retransmit list. */
904 struct ospf_lsa
*ospf_ls_retransmit_lookup(struct ospf_neighbor
*nbr
,
905 struct ospf_lsa
*lsa
)
907 return ospf_lsdb_lookup(&nbr
->ls_rxmt
, lsa
);
910 static void ospf_ls_retransmit_delete_nbr_if(struct ospf_interface
*oi
,
911 struct ospf_lsa
*lsa
)
913 struct route_node
*rn
;
914 struct ospf_neighbor
*nbr
;
915 struct ospf_lsa
*lsr
;
917 if (ospf_if_is_enable(oi
))
918 for (rn
= route_top(oi
->nbrs
); rn
; rn
= route_next(rn
))
919 /* If LSA find in LS-retransmit list, then remove it. */
920 if ((nbr
= rn
->info
) != NULL
) {
921 lsr
= ospf_ls_retransmit_lookup(nbr
, lsa
);
923 /* If LSA find in ls-retransmit list, remove it.
926 && lsr
->data
->ls_seqnum
927 == lsa
->data
->ls_seqnum
)
928 ospf_ls_retransmit_delete(nbr
, lsr
);
932 void ospf_ls_retransmit_delete_nbr_area(struct ospf_area
*area
,
933 struct ospf_lsa
*lsa
)
935 struct listnode
*node
, *nnode
;
936 struct ospf_interface
*oi
;
938 for (ALL_LIST_ELEMENTS(area
->oiflist
, node
, nnode
, oi
))
939 ospf_ls_retransmit_delete_nbr_if(oi
, lsa
);
942 void ospf_ls_retransmit_delete_nbr_as(struct ospf
*ospf
, struct ospf_lsa
*lsa
)
944 struct listnode
*node
, *nnode
;
945 struct ospf_interface
*oi
;
947 for (ALL_LIST_ELEMENTS(ospf
->oiflist
, node
, nnode
, oi
))
948 ospf_ls_retransmit_delete_nbr_if(oi
, lsa
);
952 /* Sets ls_age to MaxAge and floods throu the area.
953 When we implement ASE routing, there will be anothe function
954 flushing an LSA from the whole domain. */
955 void ospf_lsa_flush_area(struct ospf_lsa
*lsa
, struct ospf_area
*area
)
957 /* Reset the lsa origination time such that it gives
958 more time for the ACK to be received and avoid
960 lsa
->data
->ls_age
= htons(OSPF_LSA_MAXAGE
);
961 if (IS_DEBUG_OSPF_EVENT
)
962 zlog_debug("%s: MAXAGE set to LSA %s", __PRETTY_FUNCTION__
,
963 inet_ntoa(lsa
->data
->id
));
964 monotime(&lsa
->tv_recv
);
965 lsa
->tv_orig
= lsa
->tv_recv
;
966 ospf_flood_through_area(area
, NULL
, lsa
);
967 ospf_lsa_maxage(area
->ospf
, lsa
);
970 void ospf_lsa_flush_as(struct ospf
*ospf
, struct ospf_lsa
*lsa
)
972 /* Reset the lsa origination time such that it gives
973 more time for the ACK to be received and avoid
975 lsa
->data
->ls_age
= htons(OSPF_LSA_MAXAGE
);
976 monotime(&lsa
->tv_recv
);
977 lsa
->tv_orig
= lsa
->tv_recv
;
978 ospf_flood_through_as(ospf
, NULL
, lsa
);
979 ospf_lsa_maxage(ospf
, lsa
);
982 void ospf_lsa_flush(struct ospf
*ospf
, struct ospf_lsa
*lsa
)
984 lsa
->data
->ls_age
= htons(OSPF_LSA_MAXAGE
);
986 switch (lsa
->data
->type
) {
987 case OSPF_ROUTER_LSA
:
988 case OSPF_NETWORK_LSA
:
989 case OSPF_SUMMARY_LSA
:
990 case OSPF_ASBR_SUMMARY_LSA
:
991 case OSPF_AS_NSSA_LSA
:
992 case OSPF_OPAQUE_LINK_LSA
:
993 case OSPF_OPAQUE_AREA_LSA
:
994 ospf_lsa_flush_area(lsa
, lsa
->area
);
996 case OSPF_AS_EXTERNAL_LSA
:
997 case OSPF_OPAQUE_AS_LSA
:
998 ospf_lsa_flush_as(ospf
, lsa
);
1001 zlog_info("%s: Unknown LSA type %u", __func__
, lsa
->data
->type
);