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 seq 0x%x",
123 new->data
->type
, inet_ntoa (new->data
->id
),
124 ntohl(new->data
->ls_seqnum
));
126 /* If we're here, we installed a self-originated LSA that we received
127 from a neighbor, i.e. it's more recent. We must see whether we want
129 If yes, we should use this LSA's sequence number and reoriginate
131 if not --- we must flush this LSA from the domain. */
132 switch (new->data
->type
)
134 case OSPF_ROUTER_LSA
:
135 /* Originate a new instance and schedule flooding */
136 /* It shouldn't be necessary, but anyway */
137 ospf_lsa_unlock (area
->router_lsa_self
);
138 area
->router_lsa_self
= ospf_lsa_lock (new);
140 ospf_router_lsa_timer_add (area
);
142 case OSPF_NETWORK_LSA
:
143 #ifdef HAVE_OPAQUE_LSA
144 case OSPF_OPAQUE_LINK_LSA
:
145 #endif /* HAVE_OPAQUE_LSA */
146 /* We must find the interface the LSA could belong to.
147 If the interface is no more a broadcast type or we are no more
148 the DR, we flush the LSA otherwise -- create the new instance and
149 schedule flooding. */
151 /* Look through all interfaces, not just area, since interface
152 could be moved from one area to another. */
153 for (node
= listhead (ospf
->oiflist
); node
; nextnode (node
))
154 /* These are sanity check. */
155 if ((oi
= getdata (node
)) != NULL
)
156 if (IPV4_ADDR_SAME (&oi
->address
->u
.prefix4
, &new->data
->id
))
158 if (oi
->area
!= area
||
159 oi
->type
!= OSPF_IFTYPE_BROADCAST
||
160 !IPV4_ADDR_SAME (&oi
->address
->u
.prefix4
, &DR (oi
)))
162 ospf_schedule_lsa_flush_area (area
, new);
166 #ifdef HAVE_OPAQUE_LSA
167 if (new->data
->type
== OSPF_OPAQUE_LINK_LSA
)
169 ospf_opaque_lsa_refresh (new);
172 #endif /* HAVE_OPAQUE_LSA */
174 ospf_lsa_unlock (oi
->network_lsa_self
);
175 oi
->network_lsa_self
= ospf_lsa_lock (new);
177 /* Schedule network-LSA origination. */
178 ospf_network_lsa_timer_add (oi
);
182 case OSPF_SUMMARY_LSA
:
183 case OSPF_ASBR_SUMMARY_LSA
:
184 ospf_schedule_abr_task (ospf
);
186 case OSPF_AS_EXTERNAL_LSA
:
187 case OSPF_AS_NSSA_LSA
:
188 if ( (new->data
->type
== OSPF_AS_EXTERNAL_LSA
)
189 && CHECK_FLAG (new->flags
, OSPF_LSA_LOCAL_XLT
))
191 ospf_translated_nssa_refresh (ospf
, NULL
, new);
194 ei
= ospf_external_info_check (new);
196 ospf_external_lsa_refresh (ospf
, new, ei
, LSA_REFRESH_FORCE
);
198 ospf_lsa_flush_as (ospf
, new);
200 #ifdef HAVE_OPAQUE_LSA
201 case OSPF_OPAQUE_AREA_LSA
:
202 ospf_opaque_lsa_refresh (new);
204 case OSPF_OPAQUE_AS_LSA
:
205 ospf_opaque_lsa_refresh (new); /* Reconsideration may needed. *//* XXX */
207 #endif /* HAVE_OPAQUE_LSA */
213 /* OSPF LSA flooding -- RFC2328 Section 13.(5). */
215 /* Now Updated for NSSA operation, as follows:
218 Type-5's have no change. Blocked to STUB or NSSA.
220 Type-7's can be received, and if a DR
221 they will also flood the local NSSA Area as Type-7's
223 If a Self-Originated LSA (now an ASBR),
224 The LSDB will be updated as Type-5's, (for continual re-fresh)
226 If an NSSA-IR it is installed/flooded as Type-7, P-bit on.
227 if an NSSA-ABR it is installed/flooded as Type-7, P-bit off.
229 Later, during the ABR TASK, if the ABR is the Elected NSSA
230 translator, then All Type-7s (with P-bit ON) are Translated to
231 Type-5's and flooded to all non-NSSA/STUB areas.
233 During ASE Calculations,
234 non-ABRs calculate external routes from Type-7's
235 ABRs calculate external routes from Type-5's and non-self Type-7s
238 ospf_flood (struct ospf
*ospf
, struct ospf_neighbor
*nbr
,
239 struct ospf_lsa
*current
, struct ospf_lsa
*new)
241 struct ospf_interface
*oi
;
245 /* Type-7 LSA's will be flooded throughout their native NSSA area,
246 but will also be flooded as Type-5's into ABR capable links. */
248 if (IS_DEBUG_OSPF_EVENT
)
249 zlog_info ("LSA[Flooding]: start, NBR %s (%s), cur(%p), New-LSA[%s]",
250 inet_ntoa (nbr
->router_id
),
251 LOOKUP (ospf_nsm_state_msg
, nbr
->state
),
258 /* Get current time. */
259 gettimeofday (&now
, NULL
);
261 /* If there is already a database copy, and if the
262 database copy was received via flooding and installed less
263 than MinLSArrival seconds ago, discard the new LSA
264 (without acknowledging it). */
265 if (current
!= NULL
) /* -- endo. */
267 if (IS_LSA_SELF (current
)
268 && (ntohs (current
->data
->ls_age
) == 0
269 && ntohl (current
->data
->ls_seqnum
) == OSPF_INITIAL_SEQUENCE_NUMBER
))
271 if (IS_DEBUG_OSPF_EVENT
)
272 zlog_info ("LSA[Flooding]: Got a self-originated LSA, "
273 "while local one is initial instance.");
274 ; /* Accept this LSA for quick LSDB resynchronization. */
276 else if (tv_cmp (tv_sub (now
, current
->tv_recv
),
277 int2tv (OSPF_MIN_LS_ARRIVAL
)) < 0)
279 if (IS_DEBUG_OSPF_EVENT
)
280 zlog_info ("LSA[Flooding]: LSA is received recently.");
285 /* Flood the new LSA out some subset of the router's interfaces.
286 In some cases (e.g., the state of the receiving interface is
287 DR and the LSA was received from a router other than the
288 Backup DR) the LSA will be flooded back out the receiving
290 lsa_ack_flag
= ospf_flood_through (ospf
, nbr
, new);
292 #ifdef HAVE_OPAQUE_LSA
293 /* Remove the current database copy from all neighbors' Link state
294 retransmission lists. AS_EXTERNAL and AS_EXTERNAL_OPAQUE does
295 ^^^^^^^^^^^^^^^^^^^^^^^
297 All other (even NSSA's) do have area ID. */
298 #else /* HAVE_OPAQUE_LSA */
299 /* Remove the current database copy from all neighbors' Link state
300 retransmission lists. Only AS_EXTERNAL does not have area ID.
301 All other (even NSSA's) do have area ID. */
302 #endif /* HAVE_OPAQUE_LSA */
305 switch (current
->data
->type
)
307 case OSPF_AS_EXTERNAL_LSA
:
308 #ifdef HAVE_OPAQUE_LSA
309 case OSPF_OPAQUE_AS_LSA
:
310 #endif /* HAVE_OPAQUE_LSA */
311 ospf_ls_retransmit_delete_nbr_as (ospf
, current
);
314 ospf_ls_retransmit_delete_nbr_area (nbr
->oi
->area
, current
);
319 /* Do some internal house keeping that is needed here */
320 SET_FLAG (new->flags
, OSPF_LSA_RECEIVED
);
321 ospf_lsa_is_self_originated (ospf
, new); /* Let it set the flag */
323 /* Install the new LSA in the link state database
324 (replacing the current database copy). This may cause the
325 routing table calculation to be scheduled. In addition,
326 timestamp the new LSA with the current time. The flooding
327 procedure cannot overwrite the newly installed LSA until
328 MinLSArrival seconds have elapsed. */
330 new = ospf_lsa_install (ospf
, nbr
->oi
, new);
332 /* Acknowledge the receipt of the LSA by sending a Link State
333 Acknowledgment packet back out the receiving interface. */
335 ospf_flood_delayed_lsa_ack (nbr
, new);
337 /* If this new LSA indicates that it was originated by the
338 receiving router itself, the router must take special action,
339 either updating the LSA or in some cases flushing it from
340 the routing domain. */
341 if (ospf_lsa_is_self_originated (ospf
, new))
342 ospf_process_self_originated_lsa (ospf
, new, oi
->area
);
344 /* Update statistics value for OSPF-MIB. */
345 ospf
->rx_lsa_count
++;
350 /* OSPF LSA flooding -- RFC2328 Section 13.3. */
352 ospf_flood_through_interface (struct ospf_interface
*oi
,
353 struct ospf_neighbor
*inbr
,
354 struct ospf_lsa
*lsa
)
356 struct ospf_neighbor
*onbr
;
357 struct route_node
*rn
;
360 if (IS_DEBUG_OSPF_EVENT
)
361 zlog_info ("ospf_flood_through_interface(): "
362 "considering int %s, INBR(%s), LSA[%s]",
363 IF_NAME (oi
), inbr
? inet_ntoa (inbr
->router_id
) : "NULL",
366 if (!ospf_if_is_enable (oi
))
369 /* Remember if new LSA is aded to a retransmit list. */
372 /* Each of the neighbors attached to this interface are examined,
373 to determine whether they must receive the new LSA. The following
374 steps are executed for each neighbor: */
375 for (rn
= route_top (oi
->nbrs
); rn
; rn
= route_next (rn
))
377 struct ospf_lsa
*ls_req
;
379 if (rn
->info
== NULL
)
383 if (IS_DEBUG_OSPF_EVENT
)
384 zlog_info ("ospf_flood_through_interface(): considering nbr %s (%s)",
385 inet_ntoa (onbr
->router_id
),
386 LOOKUP (ospf_nsm_state_msg
, onbr
->state
));
388 /* If the neighbor is in a lesser state than Exchange, it
389 does not participate in flooding, and the next neighbor
390 should be examined. */
391 if (onbr
->state
< NSM_Exchange
)
394 /* If the adjacency is not yet full (neighbor state is
395 Exchange or Loading), examine the Link state request
396 list associated with this adjacency. If there is an
397 instance of the new LSA on the list, it indicates that
398 the neighboring router has an instance of the LSA
399 already. Compare the new LSA to the neighbor's copy: */
400 if (onbr
->state
< NSM_Full
)
402 if (IS_DEBUG_OSPF_EVENT
)
403 zlog_info ("ospf_flood_through_interface(): nbr adj is not Full");
404 ls_req
= ospf_ls_request_lookup (onbr
, lsa
);
409 ret
= ospf_lsa_more_recent (ls_req
, lsa
);
410 /* The new LSA is less recent. */
413 /* The two copies are the same instance, then delete
414 the LSA from the Link state request list. */
417 ospf_ls_request_delete (onbr
, ls_req
);
418 ospf_check_nbr_loading (onbr
);
421 /* The new LSA is more recent. Delete the LSA
422 from the Link state request list. */
425 ospf_ls_request_delete (onbr
, ls_req
);
426 ospf_check_nbr_loading (onbr
);
431 #ifdef HAVE_OPAQUE_LSA
432 if (IS_OPAQUE_LSA (lsa
->data
->type
))
434 if (! CHECK_FLAG (onbr
->options
, OSPF_OPTION_O
))
436 if (IS_DEBUG_OSPF (lsa
, LSA_FLOODING
))
437 zlog_info ("Skip this neighbor: Not Opaque-capable.");
441 if (IS_OPAQUE_LSA_ORIGINATION_BLOCKED (oi
->ospf
->opaque
)
443 && onbr
->state
== NSM_Full
)
445 /* Small attempt to reduce unnecessary retransmission. */
446 if (IS_DEBUG_OSPF (lsa
, LSA_FLOODING
))
447 zlog_info ("Skip this neighbor: Initial flushing done.");
451 #endif /* HAVE_OPAQUE_LSA */
453 /* If the new LSA was received from this neighbor,
454 examine the next neighbor. */
455 #ifdef ORIGINAL_CODING
457 if (IPV4_ADDR_SAME (&inbr
->router_id
, &onbr
->router_id
))
459 #else /* ORIGINAL_CODING */
463 * Triggered by LSUpd message parser "ospf_ls_upd ()".
464 * E.g., all LSAs handling here is received via network.
466 if (IPV4_ADDR_SAME (&inbr
->router_id
, &onbr
->router_id
))
468 if (IS_DEBUG_OSPF (lsa
, LSA_FLOODING
))
469 zlog_info ("Skip this neighbor: inbr == onbr");
476 * Triggered by MaxAge remover, so far.
477 * NULL "inbr" means flooding starts from this node.
479 if (IPV4_ADDR_SAME (&lsa
->data
->adv_router
, &onbr
->router_id
))
481 if (IS_DEBUG_OSPF (lsa
, LSA_FLOODING
))
482 zlog_info ("Skip this neighbor: lsah->adv_router == onbr");
486 #endif /* ORIGINAL_CODING */
488 /* Add the new LSA to the Link state retransmission list
489 for the adjacency. The LSA will be retransmitted
490 at intervals until an acknowledgment is seen from
492 ospf_ls_retransmit_add (onbr
, lsa
);
496 /* If in the previous step, the LSA was NOT added to any of
497 the Link state retransmission lists, there is no need to
498 flood the LSA out the interface. */
501 return (inbr
&& inbr
->oi
== oi
);
504 /* if we've received the lsa on this interface we need to perform
505 additional checking */
506 if (inbr
&& (inbr
->oi
== oi
))
508 /* If the new LSA was received on this interface, and it was
509 received from either the Designated Router or the Backup
510 Designated Router, chances are that all the neighbors have
511 received the LSA already. */
512 if (NBR_IS_DR (inbr
) || NBR_IS_BDR (inbr
))
514 if (IS_DEBUG_OSPF_NSSA
)
515 zlog_info ("ospf_flood_through_interface(): "
516 "DR/BDR NOT SEND to int %s", IF_NAME (oi
));
520 /* If the new LSA was received on this interface, and the
521 interface state is Backup, examine the next interface. The
522 Designated Router will do the flooding on this interface.
523 However, if the Designated Router fails the router will
524 end up retransmitting the updates. */
526 if (oi
->state
== ISM_Backup
)
528 if (IS_DEBUG_OSPF_NSSA
)
529 zlog_info ("ospf_flood_through_interface(): "
530 "ISM_Backup NOT SEND to int %s", IF_NAME (oi
));
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
541 /* XXX HASSO: Is this IS_DEBUG_OSPF_NSSA really correct? */
542 if (IS_DEBUG_OSPF_NSSA
)
543 zlog_info ("ospf_flood_through_interface(): "
544 "DR/BDR sending upd to int %s", IF_NAME (oi
));
546 /* RFC2328 Section 13.3
547 On non-broadcast networks, separate Link State Update
548 packets must be sent, as unicasts, to each adjacent neighbor
549 (i.e., those in state Exchange or greater). The destination
550 IP addresses for these packets are the neighbors' IP
552 if (oi
->type
== OSPF_IFTYPE_NBMA
)
554 struct route_node
*rn
;
555 struct ospf_neighbor
*nbr
;
557 for (rn
= route_top (oi
->nbrs
); rn
; rn
= route_next (rn
))
558 if ((nbr
= rn
->info
) != NULL
)
559 if (nbr
!= oi
->nbr_self
&& nbr
->state
>= NSM_Exchange
)
560 ospf_ls_upd_send_lsa (nbr
, lsa
, OSPF_SEND_PACKET_DIRECT
);
563 ospf_ls_upd_send_lsa (oi
->nbr_self
, lsa
, OSPF_SEND_PACKET_INDIRECT
);
569 ospf_flood_through_area (struct ospf_area
*area
,
570 struct ospf_neighbor
*inbr
, struct ospf_lsa
*lsa
)
573 int lsa_ack_flag
= 0;
575 /* All other types are specific to a single area (Area A). The
576 eligible interfaces are all those interfaces attaching to the
577 Area A. If Area A is the backbone, this includes all the virtual
579 for (node
= listhead (area
->oiflist
); node
; nextnode (node
))
581 struct ospf_interface
*oi
= getdata (node
);
583 if (area
->area_id
.s_addr
!= OSPF_AREA_BACKBONE
&&
584 oi
->type
== OSPF_IFTYPE_VIRTUALLINK
)
587 #ifdef HAVE_OPAQUE_LSA
588 if ((lsa
->data
->type
== OSPF_OPAQUE_LINK_LSA
) && (lsa
->oi
!= oi
))
591 * Link local scoped Opaque-LSA should only be flooded
592 * for the link on which the LSA has received.
594 if (IS_DEBUG_OSPF (lsa
, LSA_FLOODING
))
595 zlog_info ("Type-9 Opaque-LSA: lsa->oi(%p) != oi(%p)", lsa
->oi
, oi
);
598 #endif /* HAVE_OPAQUE_LSA */
600 if (ospf_flood_through_interface (oi
, inbr
, lsa
))
604 return (lsa_ack_flag
);
608 ospf_flood_through_as (struct ospf
*ospf
, struct ospf_neighbor
*inbr
,
609 struct ospf_lsa
*lsa
)
616 /* The incoming LSA is type 5 or type 7 (AS-EXTERNAL or AS-NSSA )
618 Divert the Type-5 LSA's to all non-NSSA/STUB areas
620 Divert the Type-7 LSA's to all NSSA areas
622 AS-external-LSAs are flooded throughout the entire AS, with the
623 exception of stub areas (see Section 3.6). The eligible
624 interfaces are all the router's interfaces, excluding virtual
625 links and those interfaces attaching to stub areas. */
627 if (CHECK_FLAG (lsa
->flags
, OSPF_LSA_LOCAL_XLT
)) /* Translated from 7 */
628 if (IS_DEBUG_OSPF_NSSA
)
629 zlog_info ("Flood/AS: NSSA TRANSLATED LSA");
631 for (node
= listhead (ospf
->areas
); node
; nextnode (node
))
633 int continue_flag
= 0;
634 struct ospf_area
*area
= getdata (node
);
637 switch (area
->external_routing
)
639 /* Don't send AS externals into stub areas. Various types
640 of support for partial stub areas can be implemented
641 here. NSSA's will receive Type-7's that have areas
642 matching the originl LSA. */
643 case OSPF_AREA_NSSA
: /* Sending Type 5 or 7 into NSSA area */
644 /* Type-7, flood NSSA area */
645 if (lsa
->data
->type
== OSPF_AS_NSSA_LSA
646 && area
== lsa
->area
)
647 /* We will send it. */
650 continue_flag
= 1; /* Skip this NSSA area for Type-5's et al */
653 case OSPF_AREA_TYPE_MAX
:
655 continue_flag
= 1; /* Skip this area. */
658 case OSPF_AREA_DEFAULT
:
660 /* No Type-7 into normal area */
661 if (lsa
->data
->type
== OSPF_AS_NSSA_LSA
)
662 continue_flag
= 1; /* skip Type-7 */
664 continue_flag
= 0; /* Do this area. */
668 /* Do continue for above switch. Saves a big if then mess */
670 continue; /* main for-loop */
672 /* send to every interface in this area */
674 for (if_node
= listhead (area
->oiflist
); if_node
; nextnode (if_node
))
676 struct ospf_interface
*oi
= getdata (if_node
);
678 /* Skip virtual links */
679 if (oi
->type
!= OSPF_IFTYPE_VIRTUALLINK
)
680 if (ospf_flood_through_interface (oi
, inbr
, lsa
)) /* lsa */
683 } /* main area for-loop */
685 return (lsa_ack_flag
);
689 ospf_flood_through (struct ospf
*ospf
,
690 struct ospf_neighbor
*inbr
, struct ospf_lsa
*lsa
)
692 int lsa_ack_flag
= 0;
694 /* Type-7 LSA's for NSSA are flooded throughout the AS here, and
695 upon return are updated in the LSDB for Type-7's. Later,
696 re-fresh will re-send them (and also, if ABR, packet code will
697 translate to Type-5's)
699 As usual, Type-5 LSA's (if not DISCARDED because we are STUB or
700 NSSA) are flooded throughout the AS, and are updated in the
702 #ifdef ORIGINAL_CODING
703 switch (lsa
->data
->type
)
705 case OSPF_ROUTER_LSA
:
706 case OSPF_NETWORK_LSA
:
707 case OSPF_SUMMARY_LSA
:
708 case OSPF_ASBR_SUMMARY_LSA
:
709 #ifdef HAVE_OPAQUE_LSA
710 case OSPF_OPAQUE_LINK_LSA
: /* ospf_flood_through_interface ? */
711 case OSPF_OPAQUE_AREA_LSA
:
712 #endif /* HAVE_OPAQUE_LSA */
713 lsa_ack_flag
= ospf_flood_through_area (inbr
->oi
->area
, inbr
, lsa
);
715 case OSPF_AS_EXTERNAL_LSA
: /* Type-5 */
716 #ifdef HAVE_OPAQUE_LSA
717 case OSPF_OPAQUE_AS_LSA
:
718 #endif /* HAVE_OPAQUE_LSA */
719 lsa_ack_flag
= ospf_flood_through_as (ospf
, inbr
, lsa
);
721 /* Type-7 Only received within NSSA, then flooded */
722 case OSPF_AS_NSSA_LSA
:
723 /* Any P-bit was installed with the Type-7. */
724 lsa_ack_flag
= ospf_flood_through_area (inbr
->oi
->area
, inbr
, lsa
);
726 if (IS_DEBUG_OSPF_NSSA
)
727 zlog_info ("ospf_flood_through: LOCAL NSSA FLOOD of Type-7.");
732 #else /* ORIGINAL_CODING */
734 * At the common sub-sub-function "ospf_flood_through_interface()",
735 * a parameter "inbr" will be used to distinguish the called context
736 * whether the given LSA was received from the neighbor, or the
737 * flooding for the LSA starts from this node (e.g. the LSA was self-
738 * originated, or the LSA is going to be flushed from routing domain).
740 * So, for consistency reasons, this function "ospf_flood_through()"
741 * should also allow the usage that the given "inbr" parameter to be
742 * NULL. If we do so, corresponding AREA parameter should be referred
743 * by "lsa->area", instead of "inbr->oi->area".
745 switch (lsa
->data
->type
)
747 case OSPF_AS_EXTERNAL_LSA
: /* Type-5 */
748 #ifdef HAVE_OPAQUE_LSA
749 case OSPF_OPAQUE_AS_LSA
:
750 #endif /* HAVE_OPAQUE_LSA */
751 lsa_ack_flag
= ospf_flood_through_as (ospf
, inbr
, lsa
);
753 /* Type-7 Only received within NSSA, then flooded */
754 case OSPF_AS_NSSA_LSA
:
755 /* Any P-bit was installed with the Type-7. */
757 if (IS_DEBUG_OSPF_NSSA
)
758 zlog_info ("ospf_flood_through: LOCAL NSSA FLOOD of Type-7.");
761 lsa_ack_flag
= ospf_flood_through_area (lsa
->area
, inbr
, lsa
);
764 #endif /* ORIGINAL_CODING */
766 return (lsa_ack_flag
);
771 /* Management functions for neighbor's Link State Request list. */
773 ospf_ls_request_add (struct ospf_neighbor
*nbr
, struct ospf_lsa
*lsa
)
776 * We cannot make use of the newly introduced callback function
777 * "lsdb->new_lsa_hook" to replace debug output below, just because
778 * it seems no simple and smart way to pass neighbor information to
779 * the common function "ospf_lsdb_add()" -- endo.
781 if (IS_DEBUG_OSPF (lsa
, LSA_FLOODING
))
782 zlog_info ("RqstL(%lu)++, NBR(%s), LSA[%s]",
783 ospf_ls_request_count (nbr
),
784 inet_ntoa (nbr
->router_id
), dump_lsa_key (lsa
));
786 ospf_lsdb_add (&nbr
->ls_req
, lsa
);
790 ospf_ls_request_count (struct ospf_neighbor
*nbr
)
792 return ospf_lsdb_count_all (&nbr
->ls_req
);
796 ospf_ls_request_isempty (struct ospf_neighbor
*nbr
)
798 return ospf_lsdb_isempty (&nbr
->ls_req
);
801 /* Remove LSA from neighbor's ls-request list. */
803 ospf_ls_request_delete (struct ospf_neighbor
*nbr
, struct ospf_lsa
*lsa
)
805 if (nbr
->ls_req_last
== lsa
)
807 ospf_lsa_unlock (nbr
->ls_req_last
);
808 nbr
->ls_req_last
= NULL
;
811 if (IS_DEBUG_OSPF (lsa
, LSA_FLOODING
)) /* -- endo. */
812 zlog_info ("RqstL(%lu)--, NBR(%s), LSA[%s]",
813 ospf_ls_request_count (nbr
),
814 inet_ntoa (nbr
->router_id
), dump_lsa_key (lsa
));
816 ospf_lsdb_delete (&nbr
->ls_req
, lsa
);
819 /* Remove all LSA from neighbor's ls-requenst list. */
821 ospf_ls_request_delete_all (struct ospf_neighbor
*nbr
)
823 ospf_lsa_unlock (nbr
->ls_req_last
);
824 nbr
->ls_req_last
= NULL
;
825 ospf_lsdb_delete_all (&nbr
->ls_req
);
828 /* Lookup LSA from neighbor's ls-request list. */
830 ospf_ls_request_lookup (struct ospf_neighbor
*nbr
, struct ospf_lsa
*lsa
)
832 return ospf_lsdb_lookup (&nbr
->ls_req
, lsa
);
836 ospf_ls_request_new (struct lsa_header
*lsah
)
838 struct ospf_lsa
*new;
840 new = ospf_lsa_new ();
841 new->data
= ospf_lsa_data_new (OSPF_LSA_HEADER_SIZE
);
842 memcpy (new->data
, lsah
, OSPF_LSA_HEADER_SIZE
);
848 /* Management functions for neighbor's ls-retransmit list. */
850 ospf_ls_retransmit_count (struct ospf_neighbor
*nbr
)
852 return ospf_lsdb_count_all (&nbr
->ls_rxmt
);
856 ospf_ls_retransmit_count_self (struct ospf_neighbor
*nbr
, int lsa_type
)
858 return ospf_lsdb_count_self (&nbr
->ls_rxmt
, lsa_type
);
862 ospf_ls_retransmit_isempty (struct ospf_neighbor
*nbr
)
864 return ospf_lsdb_isempty (&nbr
->ls_rxmt
);
867 /* Add LSA to be retransmitted to neighbor's ls-retransmit list. */
869 ospf_ls_retransmit_add (struct ospf_neighbor
*nbr
, struct ospf_lsa
*lsa
)
871 struct ospf_lsa
*old
;
873 old
= ospf_ls_retransmit_lookup (nbr
, lsa
);
875 if (ospf_lsa_more_recent (old
, lsa
) < 0)
879 old
->retransmit_counter
--;
880 ospf_lsdb_delete (&nbr
->ls_rxmt
, old
);
882 lsa
->retransmit_counter
++;
884 * We cannot make use of the newly introduced callback function
885 * "lsdb->new_lsa_hook" to replace debug output below, just because
886 * it seems no simple and smart way to pass neighbor information to
887 * the common function "ospf_lsdb_add()" -- endo.
889 if (IS_DEBUG_OSPF (lsa
, LSA_FLOODING
))
890 zlog_info ("RXmtL(%lu)++, NBR(%s), LSA[%s]",
891 ospf_ls_retransmit_count (nbr
),
892 inet_ntoa (nbr
->router_id
), dump_lsa_key (lsa
));
893 ospf_lsdb_add (&nbr
->ls_rxmt
, lsa
);
897 /* Remove LSA from neibghbor's ls-retransmit list. */
899 ospf_ls_retransmit_delete (struct ospf_neighbor
*nbr
, struct ospf_lsa
*lsa
)
901 if (ospf_ls_retransmit_lookup (nbr
, lsa
))
903 lsa
->retransmit_counter
--;
904 if (IS_DEBUG_OSPF (lsa
, LSA_FLOODING
)) /* -- endo. */
905 zlog_info ("RXmtL(%lu)--, NBR(%s), LSA[%s]",
906 ospf_ls_retransmit_count (nbr
),
907 inet_ntoa (nbr
->router_id
), dump_lsa_key (lsa
));
908 ospf_lsdb_delete (&nbr
->ls_rxmt
, lsa
);
912 /* Clear neighbor's ls-retransmit list. */
914 ospf_ls_retransmit_clear (struct ospf_neighbor
*nbr
)
916 struct ospf_lsdb
*lsdb
;
919 lsdb
= &nbr
->ls_rxmt
;
921 for (i
= OSPF_MIN_LSA
; i
< OSPF_MAX_LSA
; i
++)
923 struct route_table
*table
= lsdb
->type
[i
].db
;
924 struct route_node
*rn
;
925 struct ospf_lsa
*lsa
;
927 for (rn
= route_top (table
); rn
; rn
= route_next (rn
))
928 if ((lsa
= rn
->info
) != NULL
)
929 ospf_ls_retransmit_delete (nbr
, lsa
);
932 ospf_lsa_unlock (nbr
->ls_req_last
);
933 nbr
->ls_req_last
= NULL
;
936 /* Lookup LSA from neighbor's ls-retransmit list. */
938 ospf_ls_retransmit_lookup (struct ospf_neighbor
*nbr
, struct ospf_lsa
*lsa
)
940 return ospf_lsdb_lookup (&nbr
->ls_rxmt
, lsa
);
944 ospf_ls_retransmit_delete_nbr_if (struct ospf_interface
*oi
,
945 struct ospf_lsa
*lsa
)
947 struct route_node
*rn
;
948 struct ospf_neighbor
*nbr
;
949 struct ospf_lsa
*lsr
;
951 if (ospf_if_is_enable (oi
))
952 for (rn
= route_top (oi
->nbrs
); rn
; rn
= route_next (rn
))
953 /* If LSA find in LS-retransmit list, then remove it. */
954 if ((nbr
= rn
->info
) != NULL
)
956 lsr
= ospf_ls_retransmit_lookup (nbr
, lsa
);
958 /* If LSA find in ls-retransmit list, remove it. */
959 if (lsr
!= NULL
&& lsr
->data
->ls_seqnum
== lsa
->data
->ls_seqnum
)
960 ospf_ls_retransmit_delete (nbr
, lsr
);
965 ospf_ls_retransmit_delete_nbr_area (struct ospf_area
*area
,
966 struct ospf_lsa
*lsa
)
970 for (node
= listhead (area
->oiflist
); node
; nextnode (node
))
971 ospf_ls_retransmit_delete_nbr_if (getdata (node
), lsa
);
975 ospf_ls_retransmit_delete_nbr_as (struct ospf
*ospf
, struct ospf_lsa
*lsa
)
979 for (node
= listhead (ospf
->oiflist
); node
; nextnode (node
))
980 ospf_ls_retransmit_delete_nbr_if (getdata (node
), lsa
);
984 /* Sets ls_age to MaxAge and floods throu the area.
985 When we implement ASE routing, there will be anothe function
986 flushing an LSA from the whole domain. */
988 ospf_lsa_flush_area (struct ospf_lsa
*lsa
, struct ospf_area
*area
)
990 lsa
->data
->ls_age
= htons (OSPF_LSA_MAXAGE
);
991 ospf_flood_through_area (area
, NULL
, lsa
);
992 ospf_lsa_maxage (area
->ospf
, lsa
);
996 ospf_lsa_flush_as (struct ospf
*ospf
, struct ospf_lsa
*lsa
)
998 lsa
->data
->ls_age
= htons (OSPF_LSA_MAXAGE
);
999 ospf_flood_through_as (ospf
, NULL
, lsa
);
1000 ospf_lsa_maxage (ospf
, lsa
);