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
18 * along with GNU Zebra; see the file COPYING. If not, write to the
19 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 * Boston, MA 02111-1307, 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
57 ospf_flood_delayed_lsa_ack (struct ospf_neighbor
*inbr
, struct ospf_lsa
*lsa
)
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
, ospf_lsa_lock (lsa
));
78 /* Check LSA is related to external info. */
79 struct external_info
*
80 ospf_external_info_check (struct ospf_lsa
*lsa
)
82 struct as_external_lsa
*al
;
84 struct route_node
*rn
;
87 al
= (struct as_external_lsa
*) lsa
->data
;
90 p
.prefix
= lsa
->data
->id
;
91 p
.prefixlen
= ip_masklen (al
->mask
);
93 for (type
= 0; type
<= ZEBRA_ROUTE_MAX
; type
++)
95 int redist_type
= is_prefix_default (&p
) ? DEFAULT_ROUTE
: type
;
96 if (ospf_is_type_redistributed (redist_type
))
97 if (EXTERNAL_INFO (type
))
99 rn
= route_node_lookup (EXTERNAL_INFO (type
),
100 (struct prefix
*) &p
);
103 route_unlock_node (rn
);
104 if (rn
->info
!= NULL
)
105 return (struct external_info
*) rn
->info
;
114 ospf_process_self_originated_lsa (struct ospf
*ospf
,
115 struct ospf_lsa
*new, struct ospf_area
*area
)
117 struct ospf_interface
*oi
;
118 struct external_info
*ei
;
121 if (IS_DEBUG_OSPF_EVENT
)
122 zlog_info ("LSA[Type%d:%s]: Process self-originated LSA",
123 new->data
->type
, inet_ntoa (new->data
->id
));
125 /* If we're here, we installed a self-originated LSA that we received
126 from a neighbor, i.e. it's more recent. We must see whether we want
128 If yes, we should use this LSA's sequence number and reoriginate
130 if not --- we must flush this LSA from the domain. */
131 switch (new->data
->type
)
133 case OSPF_ROUTER_LSA
:
134 /* Originate a new instance and schedule flooding */
135 /* It shouldn't be necessary, but anyway */
136 ospf_lsa_unlock (area
->router_lsa_self
);
137 area
->router_lsa_self
= ospf_lsa_lock (new);
139 ospf_router_lsa_timer_add (area
);
141 case OSPF_NETWORK_LSA
:
142 #ifdef HAVE_OPAQUE_LSA
143 case OSPF_OPAQUE_LINK_LSA
:
144 #endif /* HAVE_OPAQUE_LSA */
145 /* We must find the interface the LSA could belong to.
146 If the interface is no more a broadcast type or we are no more
147 the DR, we flush the LSA otherwise -- create the new instance and
148 schedule flooding. */
150 /* Look through all interfaces, not just area, since interface
151 could be moved from one area to another. */
152 for (node
= listhead (ospf
->oiflist
); node
; nextnode (node
))
153 /* These are sanity check. */
154 if ((oi
= getdata (node
)) != NULL
)
155 if (IPV4_ADDR_SAME (&oi
->address
->u
.prefix4
, &new->data
->id
))
157 if (oi
->area
!= area
||
158 oi
->type
!= OSPF_IFTYPE_BROADCAST
||
159 !IPV4_ADDR_SAME (&oi
->address
->u
.prefix4
, &DR (oi
)))
161 ospf_schedule_lsa_flush_area (area
, new);
165 #ifdef HAVE_OPAQUE_LSA
166 if (new->data
->type
== OSPF_OPAQUE_LINK_LSA
)
168 ospf_opaque_lsa_refresh (new);
171 #endif /* HAVE_OPAQUE_LSA */
173 ospf_lsa_unlock (oi
->network_lsa_self
);
174 oi
->network_lsa_self
= ospf_lsa_lock (new);
176 /* Schedule network-LSA origination. */
177 ospf_network_lsa_timer_add (oi
);
181 case OSPF_SUMMARY_LSA
:
182 case OSPF_ASBR_SUMMARY_LSA
:
183 ospf_schedule_abr_task (ospf
);
185 case OSPF_AS_EXTERNAL_LSA
:
187 case OSPF_AS_NSSA_LSA
:
188 #endif /* HAVE_NSSA */
189 ei
= ospf_external_info_check (new);
191 ospf_external_lsa_refresh (ospf
, new, ei
, LSA_REFRESH_FORCE
);
193 ospf_lsa_flush_as (ospf
, new);
195 #ifdef HAVE_OPAQUE_LSA
196 case OSPF_OPAQUE_AREA_LSA
:
197 ospf_opaque_lsa_refresh (new);
199 case OSPF_OPAQUE_AS_LSA
:
200 ospf_opaque_lsa_refresh (new); /* Reconsideration may needed. *//* XXX */
202 #endif /* HAVE_OPAQUE_LSA */
208 /* OSPF LSA flooding -- RFC2328 Section 13.(5). */
210 /* Now Updated for NSSA operation, as follows:
213 Type-5's have no change. Blocked to STUB or NSSA.
215 Type-7's can be received, and if a DR
216 they will also flood the local NSSA Area as Type-7's
218 If a Self-Originated LSA (now an ASBR),
219 The LSDB will be updated as Type-5's, (for continual re-fresh)
221 If an NSSA-IR it is installed/flooded as Type-7, P-bit on.
222 if an NSSA-ABR it is installed/flooded as Type-7, P-bit off.
224 Later, during the ABR TASK, if the ABR is the Elected NSSA
225 translator, then All Type-7s (with P-bit ON) are Translated to
226 Type-5's and flooded to all non-NSSA/STUB areas.
228 During ASE Calculations,
229 non-ABRs calculate external routes from Type-7's
230 ABRs calculate external routes from Type-5's and non-self Type-7s
233 ospf_flood (struct ospf
*ospf
, struct ospf_neighbor
*nbr
,
234 struct ospf_lsa
*current
, struct ospf_lsa
*new)
236 struct ospf_interface
*oi
;
240 /* Type-7 LSA's will be flooded throughout their native NSSA area,
241 but will also be flooded as Type-5's into ABR capable links. */
243 if (IS_DEBUG_OSPF_EVENT
)
244 zlog_info ("LSA[Flooding]: start, NBR %s (%s), cur(%p), New-LSA[%s]",
245 inet_ntoa (nbr
->router_id
),
246 LOOKUP (ospf_nsm_state_msg
, nbr
->state
),
253 /* Get current time. */
254 gettimeofday (&now
, NULL
);
256 /* If there is already a database copy, and if the
257 database copy was received via flooding and installed less
258 than MinLSArrival seconds ago, discard the new LSA
259 (without acknowledging it). */
260 if (current
!= NULL
) /* -- endo. */
262 if (IS_LSA_SELF (current
)
263 && (ntohs (current
->data
->ls_age
) == 0
264 && ntohl (current
->data
->ls_seqnum
) == OSPF_INITIAL_SEQUENCE_NUMBER
))
266 if (IS_DEBUG_OSPF_EVENT
)
267 zlog_info ("LSA[Flooding]: Got a self-originated LSA, "
268 "while local one is initial instance.");
269 ; /* Accept this LSA for quick LSDB resynchronization. */
271 else if (tv_cmp (tv_sub (now
, current
->tv_recv
),
272 int2tv (OSPF_MIN_LS_ARRIVAL
)) < 0)
274 if (IS_DEBUG_OSPF_EVENT
)
275 zlog_info ("LSA[Flooding]: LSA is received recently.");
280 /* Flood the new LSA out some subset of the router's interfaces.
281 In some cases (e.g., the state of the receiving interface is
282 DR and the LSA was received from a router other than the
283 Backup DR) the LSA will be flooded back out the receiving
285 lsa_ack_flag
= ospf_flood_through (ospf
, nbr
, new);
287 #ifdef HAVE_OPAQUE_LSA
288 /* Remove the current database copy from all neighbors' Link state
289 retransmission lists. AS_EXTERNAL and AS_EXTERNAL_OPAQUE does
290 ^^^^^^^^^^^^^^^^^^^^^^^
292 All other (even NSSA's) do have area ID. */
293 #else /* HAVE_OPAQUE_LSA */
294 /* Remove the current database copy from all neighbors' Link state
295 retransmission lists. Only AS_EXTERNAL does not have area ID.
296 All other (even NSSA's) do have area ID. */
297 #endif /* HAVE_OPAQUE_LSA */
300 switch (current
->data
->type
)
302 case OSPF_AS_EXTERNAL_LSA
:
303 #ifdef HAVE_OPAQUE_LSA
304 case OSPF_OPAQUE_AS_LSA
:
305 #endif /* HAVE_OPAQUE_LSA */
306 ospf_ls_retransmit_delete_nbr_as (ospf
, current
);
309 ospf_ls_retransmit_delete_nbr_area (nbr
->oi
->area
, current
);
314 /* Do some internal house keeping that is needed here */
315 SET_FLAG (new->flags
, OSPF_LSA_RECEIVED
);
316 ospf_lsa_is_self_originated (ospf
, new); /* Let it set the flag */
318 /* Install the new LSA in the link state database
319 (replacing the current database copy). This may cause the
320 routing table calculation to be scheduled. In addition,
321 timestamp the new LSA with the current time. The flooding
322 procedure cannot overwrite the newly installed LSA until
323 MinLSArrival seconds have elapsed. */
325 new = ospf_lsa_install (ospf
, nbr
->oi
, new);
327 /* Acknowledge the receipt of the LSA by sending a Link State
328 Acknowledgment packet back out the receiving interface. */
330 ospf_flood_delayed_lsa_ack (nbr
, new);
332 /* If this new LSA indicates that it was originated by the
333 receiving router itself, the router must take special action,
334 either updating the LSA or in some cases flushing it from
335 the routing domain. */
336 if (ospf_lsa_is_self_originated (ospf
, new))
337 ospf_process_self_originated_lsa (ospf
, new, oi
->area
);
339 /* Update statistics value for OSPF-MIB. */
340 ospf
->rx_lsa_count
++;
345 /* OSPF LSA flooding -- RFC2328 Section 13.3. */
347 ospf_flood_through_interface (struct ospf_interface
*oi
,
348 struct ospf_neighbor
*inbr
,
349 struct ospf_lsa
*lsa
)
351 struct ospf
*ospf
= oi
->ospf
;
352 struct ospf_neighbor
*onbr
;
353 struct route_node
*rn
;
356 if (IS_DEBUG_OSPF_EVENT
)
357 zlog_info ("ospf_flood_through_interface(): "
358 "considering int %s, INBR(%s), LSA[%s]",
359 IF_NAME (oi
), inbr
? inet_ntoa (inbr
->router_id
) : "NULL",
362 if (!ospf_if_is_enable (oi
))
365 /* Remember if new LSA is aded to a retransmit list. */
368 /* Each of the neighbors attached to this interface are examined,
369 to determine whether they must receive the new LSA. The following
370 steps are executed for each neighbor: */
371 for (rn
= route_top (oi
->nbrs
); rn
; rn
= route_next (rn
))
373 struct ospf_lsa
*ls_req
;
375 if (rn
->info
== NULL
)
379 if (IS_DEBUG_OSPF_EVENT
)
380 zlog_info ("ospf_flood_through_interface(): considering nbr %s (%s)",
381 inet_ntoa (onbr
->router_id
),
382 LOOKUP (ospf_nsm_state_msg
, onbr
->state
));
384 /* If the neighbor is in a lesser state than Exchange, it
385 does not participate in flooding, and the next neighbor
386 should be examined. */
387 if (onbr
->state
< NSM_Exchange
)
390 /* If the adjacency is not yet full (neighbor state is
391 Exchange or Loading), examine the Link state request
392 list associated with this adjacency. If there is an
393 instance of the new LSA on the list, it indicates that
394 the neighboring router has an instance of the LSA
395 already. Compare the new LSA to the neighbor's copy: */
396 if (onbr
->state
< NSM_Full
)
398 if (IS_DEBUG_OSPF_EVENT
)
399 zlog_info ("ospf_flood_through_interface(): nbr adj is not Full");
400 ls_req
= ospf_ls_request_lookup (onbr
, lsa
);
405 ret
= ospf_lsa_more_recent (ls_req
, lsa
);
406 /* The new LSA is less recent. */
409 /* The two copies are the same instance, then delete
410 the LSA from the Link state request list. */
413 ospf_ls_request_delete (onbr
, ls_req
);
414 ospf_check_nbr_loading (onbr
);
417 /* The new LSA is more recent. Delete the LSA
418 from the Link state request list. */
421 ospf_ls_request_delete (onbr
, ls_req
);
422 ospf_check_nbr_loading (onbr
);
427 #ifdef HAVE_OPAQUE_LSA
428 if (IS_OPAQUE_LSA (lsa
->data
->type
))
430 if (! CHECK_FLAG (onbr
->options
, OSPF_OPTION_O
))
432 if (IS_DEBUG_OSPF (lsa
, LSA_FLOODING
))
433 zlog_info ("Skip this neighbor: Not Opaque-capable.");
437 if (IS_OPAQUE_LSA_ORIGINATION_BLOCKED (ospf
->opaque
)
439 && onbr
->state
== NSM_Full
)
441 /* Small attempt to reduce unnecessary retransmission. */
442 if (IS_DEBUG_OSPF (lsa
, LSA_FLOODING
))
443 zlog_info ("Skip this neighbor: Initial flushing done.");
447 #endif /* HAVE_OPAQUE_LSA */
449 /* If the new LSA was received from this neighbor,
450 examine the next neighbor. */
451 #ifdef ORIGINAL_CODING
453 if (IPV4_ADDR_SAME (&inbr
->router_id
, &onbr
->router_id
))
455 #else /* ORIGINAL_CODING */
459 * Triggered by LSUpd message parser "ospf_ls_upd ()".
460 * E.g., all LSAs handling here is received via network.
462 if (IPV4_ADDR_SAME (&inbr
->router_id
, &onbr
->router_id
))
464 if (IS_DEBUG_OSPF (lsa
, LSA_FLOODING
))
465 zlog_info ("Skip this neighbor: inbr == onbr");
472 * Triggered by MaxAge remover, so far.
473 * NULL "inbr" means flooding starts from this node.
475 if (IPV4_ADDR_SAME (&lsa
->data
->adv_router
, &onbr
->router_id
))
477 if (IS_DEBUG_OSPF (lsa
, LSA_FLOODING
))
478 zlog_info ("Skip this neighbor: lsah->adv_router == onbr");
482 #endif /* ORIGINAL_CODING */
484 /* Add the new LSA to the Link state retransmission list
485 for the adjacency. The LSA will be retransmitted
486 at intervals until an acknowledgment is seen from
488 ospf_ls_retransmit_add (onbr
, lsa
);
492 /* If in the previous step, the LSA was NOT added to any of
493 the Link state retransmission lists, there is no need to
494 flood the LSA out the interface. */
497 return (inbr
&& inbr
->oi
== oi
);
500 /* if we've received the lsa on this interface we need to perform
501 additional checking */
502 if (inbr
&& (inbr
->oi
== oi
))
504 /* If the new LSA was received on this interface, and it was
505 received from either the Designated Router or the Backup
506 Designated Router, chances are that all the neighbors have
507 received the LSA already. */
508 if (NBR_IS_DR (inbr
) || NBR_IS_BDR (inbr
))
511 if (IS_DEBUG_OSPF_NSSA
)
512 zlog_info ("ospf_flood_through_interface(): "
513 "DR/BDR NOT SEND to int %s", IF_NAME (oi
));
514 #endif /* HAVE_NSSA */
518 /* If the new LSA was received on this interface, and the
519 interface state is Backup, examine the next interface. The
520 Designated Router will do the flooding on this interface.
521 However, if the Designated Router fails the router will
522 end up retransmitting the updates. */
524 if (oi
->state
== ISM_Backup
)
527 if (IS_DEBUG_OSPF_NSSA
)
528 zlog_info ("ospf_flood_through_interface(): "
529 "ISM_Backup NOT SEND to int %s", IF_NAME (oi
));
530 #endif /* HAVE_NSSA */
535 /* The LSA must be flooded out the interface. Send a Link State
536 Update packet (including the new LSA as contents) out the
537 interface. The LSA's LS age must be incremented by InfTransDelay
538 (which must be > 0) when it is copied into the outgoing Link
539 State Update packet (until the LS age field reaches the maximum
543 if (IS_DEBUG_OSPF_NSSA
)
544 zlog_info ("ospf_flood_through_interface(): "
545 "DR/BDR sending upd to int %s", IF_NAME (oi
));
546 #else /* ! HAVE_NSSA */
548 if (IS_DEBUG_OSPF_EVENT
)
549 zlog_info ("ospf_flood_through_interface(): "
550 "sending upd to int %s", IF_NAME (oi
));
551 #endif /* HAVE_NSSA */
553 /* RFC2328 Section 13.3
554 On non-broadcast networks, separate Link State Update
555 packets must be sent, as unicasts, to each adjacent neighbor
556 (i.e., those in state Exchange or greater). The destination
557 IP addresses for these packets are the neighbors' IP
559 if (oi
->type
== OSPF_IFTYPE_NBMA
)
561 struct route_node
*rn
;
562 struct ospf_neighbor
*nbr
;
564 for (rn
= route_top (oi
->nbrs
); rn
; rn
= route_next (rn
))
565 if ((nbr
= rn
->info
) != NULL
)
566 if (nbr
!= oi
->nbr_self
&& nbr
->state
>= NSM_Exchange
)
567 ospf_ls_upd_send_lsa (nbr
, lsa
, OSPF_SEND_PACKET_DIRECT
);
570 ospf_ls_upd_send_lsa (oi
->nbr_self
, lsa
, OSPF_SEND_PACKET_INDIRECT
);
576 ospf_flood_through_area (struct ospf_area
*area
,
577 struct ospf_neighbor
*inbr
, struct ospf_lsa
*lsa
)
580 int lsa_ack_flag
= 0;
582 /* All other types are specific to a single area (Area A). The
583 eligible interfaces are all those interfaces attaching to the
584 Area A. If Area A is the backbone, this includes all the virtual
586 for (node
= listhead (area
->oiflist
); node
; nextnode (node
))
588 struct ospf_interface
*oi
= getdata (node
);
590 if (area
->area_id
.s_addr
!= OSPF_AREA_BACKBONE
&&
591 oi
->type
== OSPF_IFTYPE_VIRTUALLINK
)
594 #ifdef HAVE_OPAQUE_LSA
595 if ((lsa
->data
->type
== OSPF_OPAQUE_LINK_LSA
) && (lsa
->oi
!= oi
))
598 * Link local scoped Opaque-LSA should only be flooded
599 * for the link on which the LSA has received.
601 if (IS_DEBUG_OSPF (lsa
, LSA_FLOODING
))
602 zlog_info ("Type-9 Opaque-LSA: lsa->oi(%p) != oi(%p)", lsa
->oi
, oi
);
605 #endif /* HAVE_OPAQUE_LSA */
607 if (ospf_flood_through_interface (oi
, inbr
, lsa
))
611 return (lsa_ack_flag
);
615 ospf_flood_through_as (struct ospf
*ospf
, struct ospf_neighbor
*inbr
,
616 struct ospf_lsa
*lsa
)
620 struct as_external_lsa
*extlsa
;
624 /* The incoming LSA is type 5 or type 7 (AS-EXTERNAL or AS-NSSA )
626 Divert the Type-5 LSA's to all non-NSSA/STUB areas
628 Divert the Type-7 LSA's to all NSSA areas
630 AS-external-LSAs are flooded throughout the entire AS, with the
631 exception of stub areas (see Section 3.6). The eligible
632 interfaces are all the router's interfaces, excluding virtual
633 links and those interfaces attaching to stub areas. */
636 if (CHECK_FLAG (lsa
->flags
, OSPF_LSA_LOCAL_XLT
)) /* Translated from 7 */
637 if (IS_DEBUG_OSPF_NSSA
)
638 zlog_info ("Flood/AS: NSSA TRANSLATED LSA");
639 #endif /* HAVE_NSSA */
641 for (node
= listhead (ospf
->areas
); node
; nextnode (node
))
643 int continue_flag
= 0;
644 struct ospf_area
*area
= getdata (node
);
648 switch (area
->external_routing
)
650 /* Don't send AS externals into stub areas. Various types
651 of support for partial stub areas can be implemented
652 here. NSSA's will receive Type-7's that have areas
653 matching the originl LSA. */
654 case OSPF_AREA_NSSA
: /* Sending Type 5 or 7 into NSSA area */
656 /* Type-7, flood NSSA area */
657 if (lsa
->data
->type
== OSPF_AS_NSSA_LSA
658 && area
== lsa
->area
)
659 /* We will send it. */
662 continue_flag
= 1; /* Skip this NSSA area for Type-5's et al */
664 #endif /* HAVE_NSSA */
666 case OSPF_AREA_TYPE_MAX
:
668 continue_flag
= 1; /* Skip this area. */
671 case OSPF_AREA_DEFAULT
:
674 /* No Type-7 into normal area */
675 if (lsa
->data
->type
== OSPF_AS_NSSA_LSA
)
676 continue_flag
= 1; /* skip Type-7 */
678 #endif /* HAVE_NSSA */
679 continue_flag
= 0; /* Do this area. */
683 /* Do continue for above switch. Saves a big if then mess */
685 continue; /* main for-loop */
687 /* send to every interface in this area */
689 for (if_node
= listhead (area
->oiflist
); if_node
; nextnode (if_node
))
691 struct ospf_interface
*oi
= getdata (if_node
);
693 /* Skip virtual links */
694 if (oi
->type
!= OSPF_IFTYPE_VIRTUALLINK
)
695 if (ospf_flood_through_interface (oi
, inbr
, lsa
)) /* lsa */
698 } /* main area for-loop */
700 return (lsa_ack_flag
);
704 ospf_flood_through (struct ospf
*ospf
,
705 struct ospf_neighbor
*inbr
, struct ospf_lsa
*lsa
)
707 int lsa_ack_flag
= 0;
709 /* Type-7 LSA's for NSSA are flooded throughout the AS here, and
710 upon return are updated in the LSDB for Type-7's. Later,
711 re-fresh will re-send them (and also, if ABR, packet code will
712 translate to Type-5's)
714 As usual, Type-5 LSA's (if not DISCARDED because we are STUB or
715 NSSA) are flooded throughout the AS, and are updated in the
717 #ifdef ORIGINAL_CODING
718 switch (lsa
->data
->type
)
720 case OSPF_ROUTER_LSA
:
721 case OSPF_NETWORK_LSA
:
722 case OSPF_SUMMARY_LSA
:
723 case OSPF_ASBR_SUMMARY_LSA
:
724 #ifdef HAVE_OPAQUE_LSA
725 case OSPF_OPAQUE_LINK_LSA
: /* ospf_flood_through_interface ? */
726 case OSPF_OPAQUE_AREA_LSA
:
727 #endif /* HAVE_OPAQUE_LSA */
728 lsa_ack_flag
= ospf_flood_through_area (inbr
->oi
->area
, inbr
, lsa
);
730 case OSPF_AS_EXTERNAL_LSA
: /* Type-5 */
731 #ifdef HAVE_OPAQUE_LSA
732 case OSPF_OPAQUE_AS_LSA
:
733 #endif /* HAVE_OPAQUE_LSA */
734 lsa_ack_flag
= ospf_flood_through_as (ospf
, inbr
, lsa
);
737 /* Type-7 Only received within NSSA, then flooded */
738 case OSPF_AS_NSSA_LSA
:
739 /* Any P-bit was installed with the Type-7. */
740 lsa_ack_flag
= ospf_flood_through_area (inbr
->oi
->area
, inbr
, lsa
);
742 if (IS_DEBUG_OSPF_NSSA
)
743 zlog_info ("ospf_flood_through: LOCAL NSSA FLOOD of Type-7.");
745 #endif /* HAVE_NSSA */
749 #else /* ORIGINAL_CODING */
751 * At the common sub-sub-function "ospf_flood_through_interface()",
752 * a parameter "inbr" will be used to distinguish the called context
753 * whether the given LSA was received from the neighbor, or the
754 * flooding for the LSA starts from this node (e.g. the LSA was self-
755 * originated, or the LSA is going to be flushed from routing domain).
757 * So, for consistency reasons, this function "ospf_flood_through()"
758 * should also allow the usage that the given "inbr" parameter to be
759 * NULL. If we do so, corresponding AREA parameter should be referred
760 * by "lsa->area", instead of "inbr->oi->area".
762 switch (lsa
->data
->type
)
764 case OSPF_AS_EXTERNAL_LSA
: /* Type-5 */
765 #ifdef HAVE_OPAQUE_LSA
766 case OSPF_OPAQUE_AS_LSA
:
767 #endif /* HAVE_OPAQUE_LSA */
768 lsa_ack_flag
= ospf_flood_through_as (ospf
, inbr
, lsa
);
771 /* Type-7 Only received within NSSA, then flooded */
772 case OSPF_AS_NSSA_LSA
:
773 /* Any P-bit was installed with the Type-7. */
775 if (IS_DEBUG_OSPF_NSSA
)
776 zlog_info ("ospf_flood_through: LOCAL NSSA FLOOD of Type-7.");
778 #endif /* HAVE_NSSA */
780 lsa_ack_flag
= ospf_flood_through_area (lsa
->area
, inbr
, lsa
);
783 #endif /* ORIGINAL_CODING */
785 return (lsa_ack_flag
);
790 /* Management functions for neighbor's Link State Request list. */
792 ospf_ls_request_add (struct ospf_neighbor
*nbr
, struct ospf_lsa
*lsa
)
795 * We cannot make use of the newly introduced callback function
796 * "lsdb->new_lsa_hook" to replace debug output below, just because
797 * it seems no simple and smart way to pass neighbor information to
798 * the common function "ospf_lsdb_add()" -- endo.
800 if (IS_DEBUG_OSPF (lsa
, LSA_FLOODING
))
801 zlog_info ("RqstL(%lu)++, NBR(%s), LSA[%s]",
802 ospf_ls_request_count (nbr
),
803 inet_ntoa (nbr
->router_id
), dump_lsa_key (lsa
));
805 ospf_lsdb_add (&nbr
->ls_req
, lsa
);
809 ospf_ls_request_count (struct ospf_neighbor
*nbr
)
811 return ospf_lsdb_count_all (&nbr
->ls_req
);
815 ospf_ls_request_isempty (struct ospf_neighbor
*nbr
)
817 return ospf_lsdb_isempty (&nbr
->ls_req
);
820 /* Remove LSA from neighbor's ls-request list. */
822 ospf_ls_request_delete (struct ospf_neighbor
*nbr
, struct ospf_lsa
*lsa
)
824 if (nbr
->ls_req_last
== lsa
)
826 ospf_lsa_unlock (nbr
->ls_req_last
);
827 nbr
->ls_req_last
= NULL
;
830 if (IS_DEBUG_OSPF (lsa
, LSA_FLOODING
)) /* -- endo. */
831 zlog_info ("RqstL(%lu)--, NBR(%s), LSA[%s]",
832 ospf_ls_request_count (nbr
),
833 inet_ntoa (nbr
->router_id
), dump_lsa_key (lsa
));
835 ospf_lsdb_delete (&nbr
->ls_req
, lsa
);
838 /* Remove all LSA from neighbor's ls-requenst list. */
840 ospf_ls_request_delete_all (struct ospf_neighbor
*nbr
)
842 ospf_lsa_unlock (nbr
->ls_req_last
);
843 nbr
->ls_req_last
= NULL
;
844 ospf_lsdb_delete_all (&nbr
->ls_req
);
847 /* Lookup LSA from neighbor's ls-request list. */
849 ospf_ls_request_lookup (struct ospf_neighbor
*nbr
, struct ospf_lsa
*lsa
)
851 return ospf_lsdb_lookup (&nbr
->ls_req
, lsa
);
855 ospf_ls_request_new (struct lsa_header
*lsah
)
857 struct ospf_lsa
*new;
859 new = ospf_lsa_new ();
860 new->data
= ospf_lsa_data_new (OSPF_LSA_HEADER_SIZE
);
861 memcpy (new->data
, lsah
, OSPF_LSA_HEADER_SIZE
);
867 /* Management functions for neighbor's ls-retransmit list. */
869 ospf_ls_retransmit_count (struct ospf_neighbor
*nbr
)
871 return ospf_lsdb_count_all (&nbr
->ls_rxmt
);
875 ospf_ls_retransmit_count_self (struct ospf_neighbor
*nbr
, int lsa_type
)
877 return ospf_lsdb_count_self (&nbr
->ls_rxmt
, lsa_type
);
881 ospf_ls_retransmit_isempty (struct ospf_neighbor
*nbr
)
883 return ospf_lsdb_isempty (&nbr
->ls_rxmt
);
886 /* Add LSA to be retransmitted to neighbor's ls-retransmit list. */
888 ospf_ls_retransmit_add (struct ospf_neighbor
*nbr
, struct ospf_lsa
*lsa
)
890 struct ospf_lsa
*old
;
892 old
= ospf_ls_retransmit_lookup (nbr
, lsa
);
894 if (ospf_lsa_more_recent (old
, lsa
) < 0)
898 old
->retransmit_counter
--;
899 ospf_lsdb_delete (&nbr
->ls_rxmt
, old
);
901 lsa
->retransmit_counter
++;
903 * We cannot make use of the newly introduced callback function
904 * "lsdb->new_lsa_hook" to replace debug output below, just because
905 * it seems no simple and smart way to pass neighbor information to
906 * the common function "ospf_lsdb_add()" -- endo.
908 if (IS_DEBUG_OSPF (lsa
, LSA_FLOODING
))
909 zlog_info ("RXmtL(%lu)++, NBR(%s), LSA[%s]",
910 ospf_ls_retransmit_count (nbr
),
911 inet_ntoa (nbr
->router_id
), dump_lsa_key (lsa
));
912 ospf_lsdb_add (&nbr
->ls_rxmt
, lsa
);
916 /* Remove LSA from neibghbor's ls-retransmit list. */
918 ospf_ls_retransmit_delete (struct ospf_neighbor
*nbr
, struct ospf_lsa
*lsa
)
920 if (ospf_ls_retransmit_lookup (nbr
, lsa
))
922 lsa
->retransmit_counter
--;
923 if (IS_DEBUG_OSPF (lsa
, LSA_FLOODING
)) /* -- endo. */
924 zlog_info ("RXmtL(%lu)--, NBR(%s), LSA[%s]",
925 ospf_ls_retransmit_count (nbr
),
926 inet_ntoa (nbr
->router_id
), dump_lsa_key (lsa
));
927 ospf_lsdb_delete (&nbr
->ls_rxmt
, lsa
);
931 /* Clear neighbor's ls-retransmit list. */
933 ospf_ls_retransmit_clear (struct ospf_neighbor
*nbr
)
935 struct ospf_lsdb
*lsdb
;
938 lsdb
= &nbr
->ls_rxmt
;
940 for (i
= OSPF_MIN_LSA
; i
< OSPF_MAX_LSA
; i
++)
942 struct route_table
*table
= lsdb
->type
[i
].db
;
943 struct route_node
*rn
;
944 struct ospf_lsa
*lsa
;
946 for (rn
= route_top (table
); rn
; rn
= route_next (rn
))
947 if ((lsa
= rn
->info
) != NULL
)
948 ospf_ls_retransmit_delete (nbr
, lsa
);
951 ospf_lsa_unlock (nbr
->ls_req_last
);
952 nbr
->ls_req_last
= NULL
;
955 /* Lookup LSA from neighbor's ls-retransmit list. */
957 ospf_ls_retransmit_lookup (struct ospf_neighbor
*nbr
, struct ospf_lsa
*lsa
)
959 return ospf_lsdb_lookup (&nbr
->ls_rxmt
, lsa
);
963 ospf_ls_retransmit_delete_nbr_if (struct ospf_interface
*oi
,
964 struct ospf_lsa
*lsa
)
966 struct route_node
*rn
;
967 struct ospf_neighbor
*nbr
;
968 struct ospf_lsa
*lsr
;
970 if (ospf_if_is_enable (oi
))
971 for (rn
= route_top (oi
->nbrs
); rn
; rn
= route_next (rn
))
972 /* If LSA find in LS-retransmit list, then remove it. */
973 if ((nbr
= rn
->info
) != NULL
)
975 lsr
= ospf_ls_retransmit_lookup (nbr
, lsa
);
977 /* If LSA find in ls-retransmit list, remove it. */
978 if (lsr
!= NULL
&& lsr
->data
->ls_seqnum
== lsa
->data
->ls_seqnum
)
979 ospf_ls_retransmit_delete (nbr
, lsr
);
984 ospf_ls_retransmit_delete_nbr_area (struct ospf_area
*area
,
985 struct ospf_lsa
*lsa
)
989 for (node
= listhead (area
->oiflist
); node
; nextnode (node
))
990 ospf_ls_retransmit_delete_nbr_if (getdata (node
), lsa
);
994 ospf_ls_retransmit_delete_nbr_as (struct ospf
*ospf
, struct ospf_lsa
*lsa
)
998 for (node
= listhead (ospf
->oiflist
); node
; nextnode (node
))
999 ospf_ls_retransmit_delete_nbr_if (getdata (node
), lsa
);
1003 /* Sets ls_age to MaxAge and floods throu the area.
1004 When we implement ASE routing, there will be anothe function
1005 flushing an LSA from the whole domain. */
1007 ospf_lsa_flush_area (struct ospf_lsa
*lsa
, struct ospf_area
*area
)
1009 lsa
->data
->ls_age
= htons (OSPF_LSA_MAXAGE
);
1010 ospf_flood_through_area (area
, NULL
, lsa
);
1011 ospf_lsa_maxage (area
->ospf
, lsa
);
1015 ospf_lsa_flush_as (struct ospf
*ospf
, struct ospf_lsa
*lsa
)
1017 lsa
->data
->ls_age
= htons (OSPF_LSA_MAXAGE
);
1018 ospf_flood_through_as (ospf
, NULL
, lsa
);
1019 ospf_lsa_maxage (ospf
, lsa
);