2 * OSPF Interface functions.
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
36 #include "ospfd/ospfd.h"
37 #include "ospfd/ospf_spf.h"
38 #include "ospfd/ospf_interface.h"
39 #include "ospfd/ospf_ism.h"
40 #include "ospfd/ospf_asbr.h"
41 #include "ospfd/ospf_lsa.h"
42 #include "ospfd/ospf_lsdb.h"
43 #include "ospfd/ospf_neighbor.h"
44 #include "ospfd/ospf_nsm.h"
45 #include "ospfd/ospf_packet.h"
46 #include "ospfd/ospf_abr.h"
47 #include "ospfd/ospf_network.h"
48 #include "ospfd/ospf_dump.h"
50 DEFINE_QOBJ_TYPE(ospf_interface
)
51 DEFINE_HOOK(ospf_vl_add
, (struct ospf_vl_data
* vd
), (vd
))
52 DEFINE_HOOK(ospf_vl_delete
, (struct ospf_vl_data
* vd
), (vd
))
54 int ospf_interface_neighbor_count(struct ospf_interface
*oi
)
57 struct route_node
*rn
;
58 struct ospf_neighbor
*nbr
= NULL
;
60 for (rn
= route_top(oi
->nbrs
); rn
; rn
= route_next(rn
)) {
63 /* Do not show myself. */
64 if (nbr
== oi
->nbr_self
)
66 /* Down state is not shown. */
67 if (nbr
->state
== NSM_Down
)
76 int ospf_if_get_output_cost(struct ospf_interface
*oi
)
78 /* If all else fails, use default OSPF cost */
82 /* ifp speed and bw can be 0 in some platforms, use ospf default bw
83 if bw is configured under interface it would be used.
85 if (!oi
->ifp
->bandwidth
&& oi
->ifp
->speed
)
88 bw
= oi
->ifp
->bandwidth
? oi
->ifp
->bandwidth
89 : OSPF_DEFAULT_BANDWIDTH
;
90 refbw
= oi
->ospf
->ref_bandwidth
;
92 /* A specifed ip ospf cost overrides a calculated one. */
93 if (OSPF_IF_PARAM_CONFIGURED(IF_DEF_PARAMS(oi
->ifp
), output_cost_cmd
)
94 || OSPF_IF_PARAM_CONFIGURED(oi
->params
, output_cost_cmd
))
95 cost
= OSPF_IF_PARAM(oi
, output_cost_cmd
);
96 /* See if a cost can be calculated from the zebra processes
97 interface bandwidth field. */
99 cost
= (uint32_t)((double)refbw
/ (double)bw
+ (double)0.5);
102 else if (cost
> 65535)
109 void ospf_if_recalculate_output_cost(struct interface
*ifp
)
112 struct route_node
*rn
;
114 for (rn
= route_top(IF_OIFS(ifp
)); rn
; rn
= route_next(rn
)) {
115 struct ospf_interface
*oi
;
117 if ((oi
= rn
->info
) == NULL
)
120 newcost
= ospf_if_get_output_cost(oi
);
122 /* Is actual output cost changed? */
123 if (oi
->output_cost
!= newcost
) {
124 oi
->output_cost
= newcost
;
125 ospf_router_lsa_update_area(oi
->area
);
130 /* Simulate down/up on the interface. This is needed, for example, when
132 void ospf_if_reset(struct interface
*ifp
)
134 struct route_node
*rn
;
136 for (rn
= route_top(IF_OIFS(ifp
)); rn
; rn
= route_next(rn
)) {
137 struct ospf_interface
*oi
;
139 if ((oi
= rn
->info
) == NULL
)
147 void ospf_if_reset_variables(struct ospf_interface
*oi
)
149 /* Set default values. */
150 /* don't clear this flag. oi->flag = OSPF_IF_DISABLE; */
153 oi
->type
= OSPF_IFTYPE_VIRTUALLINK
;
155 /* preserve network-type */
156 if (oi
->type
!= OSPF_IFTYPE_NBMA
)
157 oi
->type
= OSPF_IFTYPE_BROADCAST
;
159 oi
->state
= ISM_Down
;
161 oi
->crypt_seqnum
= 0;
163 /* This must be short, (less than RxmtInterval)
164 - RFC 2328 Section 13.5 para 3. Set to 1 second to avoid Acks being
165 held back for too long - MAG */
169 /* lookup oi for specified prefix/ifp */
170 struct ospf_interface
*ospf_if_table_lookup(struct interface
*ifp
,
171 struct prefix
*prefix
)
174 struct route_node
*rn
;
175 struct ospf_interface
*rninfo
= NULL
;
178 p
.prefixlen
= IPV4_MAX_PREFIXLEN
;
180 /* route_node_get implicitely locks */
181 if ((rn
= route_node_lookup(IF_OIFS(ifp
), &p
))) {
182 rninfo
= (struct ospf_interface
*)rn
->info
;
183 route_unlock_node(rn
);
189 static void ospf_add_to_if(struct interface
*ifp
, struct ospf_interface
*oi
)
191 struct route_node
*rn
;
195 p
.prefixlen
= IPV4_MAX_PREFIXLEN
;
198 rn
= route_node_get(IF_OIFS(ifp
), &p
);
199 /* rn->info should either be NULL or equal to this oi
200 * as route_node_get may return an existing node
202 assert(!rn
->info
|| rn
->info
== oi
);
206 static void ospf_delete_from_if(struct interface
*ifp
,
207 struct ospf_interface
*oi
)
209 struct route_node
*rn
;
213 p
.prefixlen
= IPV4_MAX_PREFIXLEN
;
215 rn
= route_node_lookup(IF_OIFS(oi
->ifp
), &p
);
219 route_unlock_node(rn
);
220 route_unlock_node(rn
);
223 struct ospf_interface
*ospf_if_new(struct ospf
*ospf
, struct interface
*ifp
,
226 struct ospf_interface
*oi
;
228 if ((oi
= ospf_if_table_lookup(ifp
, p
)) == NULL
) {
229 oi
= XCALLOC(MTYPE_OSPF_IF
, sizeof(struct ospf_interface
));
230 memset(oi
, 0, sizeof(struct ospf_interface
));
234 /* Set zebra interface pointer. */
238 ospf_add_to_if(ifp
, oi
);
239 listnode_add(ospf
->oiflist
, oi
);
241 /* Initialize neighbor list. */
242 oi
->nbrs
= route_table_init();
244 /* Initialize static neighbor list. */
245 oi
->nbr_nbma
= list_new();
247 /* Initialize Link State Acknowledgment list. */
248 oi
->ls_ack
= list_new();
249 oi
->ls_ack_direct
.ls_ack
= list_new();
251 /* Set default values. */
252 ospf_if_reset_variables(oi
);
254 /* Set pseudo neighbor to Null */
257 oi
->ls_upd_queue
= route_table_init();
258 oi
->t_ls_upd_event
= NULL
;
259 oi
->t_ls_ack_direct
= NULL
;
261 oi
->crypt_seqnum
= time(NULL
);
263 ospf_opaque_type9_lsa_init(oi
);
267 ospf_if_stream_set(oi
);
269 QOBJ_REG(oi
, ospf_interface
);
271 if (IS_DEBUG_OSPF_EVENT
)
272 zlog_debug("%s: ospf interface %s vrf %s id %u created",
273 __PRETTY_FUNCTION__
, ifp
->name
,
274 ospf_vrf_id_to_name(ospf
->vrf_id
), ospf
->vrf_id
);
279 /* Restore an interface to its pre UP state
280 Used from ism_interface_down only */
281 void ospf_if_cleanup(struct ospf_interface
*oi
)
283 struct route_node
*rn
;
284 struct listnode
*node
, *nnode
;
285 struct ospf_neighbor
*nbr
;
286 struct ospf_nbr_nbma
*nbr_nbma
;
287 struct ospf_lsa
*lsa
;
289 /* oi->nbrs and oi->nbr_nbma should be deleted on InterfaceDown event */
290 /* delete all static neighbors attached to this interface */
291 for (ALL_LIST_ELEMENTS(oi
->nbr_nbma
, node
, nnode
, nbr_nbma
)) {
292 OSPF_POLL_TIMER_OFF(nbr_nbma
->t_poll
);
295 nbr_nbma
->nbr
->nbr_nbma
= NULL
;
296 nbr_nbma
->nbr
= NULL
;
301 listnode_delete(oi
->nbr_nbma
, nbr_nbma
);
304 /* send Neighbor event KillNbr to all associated neighbors. */
305 for (rn
= route_top(oi
->nbrs
); rn
; rn
= route_next(rn
))
306 if ((nbr
= rn
->info
) != NULL
)
307 if (nbr
!= oi
->nbr_self
)
308 OSPF_NSM_EVENT_EXECUTE(nbr
, NSM_KillNbr
);
310 /* Cleanup Link State Acknowlegdment list. */
311 for (ALL_LIST_ELEMENTS(oi
->ls_ack
, node
, nnode
, lsa
))
312 ospf_lsa_unlock(&lsa
); /* oi->ls_ack */
313 list_delete_all_node(oi
->ls_ack
);
315 oi
->crypt_seqnum
= 0;
317 /* Empty link state update queue */
318 ospf_ls_upd_queue_empty(oi
);
320 /* Reset pseudo neighbor. */
321 ospf_nbr_self_reset(oi
, oi
->ospf
->router_id
);
324 void ospf_if_free(struct ospf_interface
*oi
)
329 ospf_fifo_free(oi
->obuf
);
331 assert(oi
->state
== ISM_Down
);
333 ospf_opaque_type9_lsa_term(oi
);
337 /* Free Pseudo Neighbour */
338 ospf_nbr_delete(oi
->nbr_self
);
340 route_table_finish(oi
->nbrs
);
341 route_table_finish(oi
->ls_upd_queue
);
343 /* Free any lists that should be freed */
344 list_delete_and_null(&oi
->nbr_nbma
);
346 list_delete_and_null(&oi
->ls_ack
);
347 list_delete_and_null(&oi
->ls_ack_direct
.ls_ack
);
349 if (IS_DEBUG_OSPF_EVENT
)
350 zlog_debug("%s: ospf interface %s vrf %s id %u deleted",
351 __PRETTY_FUNCTION__
, oi
->ifp
->name
,
352 ospf_vrf_id_to_name(oi
->ifp
->vrf_id
),
355 ospf_delete_from_if(oi
->ifp
, oi
);
357 listnode_delete(oi
->ospf
->oiflist
, oi
);
358 listnode_delete(oi
->area
->oiflist
, oi
);
360 thread_cancel_event(master
, oi
);
362 memset(oi
, 0, sizeof(*oi
));
363 XFREE(MTYPE_OSPF_IF
, oi
);
366 int ospf_if_is_up(struct ospf_interface
*oi
)
368 return if_is_up(oi
->ifp
);
371 struct ospf_interface
*ospf_if_exists(struct ospf_interface
*oic
)
373 struct listnode
*node
;
375 struct ospf_interface
*oi
;
384 for (ALL_LIST_ELEMENTS_RO(ospf
->oiflist
, node
, oi
))
391 /* Lookup OSPF interface by router LSA posistion */
392 struct ospf_interface
*ospf_if_lookup_by_lsa_pos(struct ospf_area
*area
,
395 struct listnode
*node
;
396 struct ospf_interface
*oi
;
398 for (ALL_LIST_ELEMENTS_RO(area
->oiflist
, node
, oi
)) {
399 if (lsa_pos
>= oi
->lsa_pos_beg
&& lsa_pos
< oi
->lsa_pos_end
)
405 struct ospf_interface
*ospf_if_lookup_by_local_addr(struct ospf
*ospf
,
406 struct interface
*ifp
,
407 struct in_addr address
)
409 struct listnode
*node
;
410 struct ospf_interface
*oi
;
412 for (ALL_LIST_ELEMENTS_RO(ospf
->oiflist
, node
, oi
))
413 if (oi
->type
!= OSPF_IFTYPE_VIRTUALLINK
) {
414 if (ifp
&& oi
->ifp
!= ifp
)
417 if (IPV4_ADDR_SAME(&address
, &oi
->address
->u
.prefix4
))
424 struct ospf_interface
*ospf_if_lookup_by_prefix(struct ospf
*ospf
,
425 struct prefix_ipv4
*p
)
427 struct listnode
*node
;
428 struct ospf_interface
*oi
;
430 /* Check each Interface. */
431 for (ALL_LIST_ELEMENTS_RO(ospf
->oiflist
, node
, oi
)) {
432 if (oi
->type
!= OSPF_IFTYPE_VIRTUALLINK
) {
435 prefix_copy(&ptmp
, CONNECTED_PREFIX(oi
->connected
));
437 if (prefix_same(&ptmp
, (struct prefix
*)p
))
444 /* determine receiving interface by ifp and source address */
445 struct ospf_interface
*ospf_if_lookup_recv_if(struct ospf
*ospf
,
447 struct interface
*ifp
)
449 struct route_node
*rn
;
450 struct prefix_ipv4 addr
;
451 struct ospf_interface
*oi
, *match
;
453 addr
.family
= AF_INET
;
455 addr
.prefixlen
= IPV4_MAX_BITLEN
;
459 for (rn
= route_top(IF_OIFS(ifp
)); rn
; rn
= route_next(rn
)) {
462 if (!oi
) /* oi can be NULL for PtP aliases */
465 if (oi
->type
== OSPF_IFTYPE_VIRTUALLINK
)
468 if (if_is_loopback(oi
->ifp
) || if_is_vrf(oi
->ifp
))
471 if (CHECK_FLAG(oi
->connected
->flags
, ZEBRA_IFA_UNNUMBERED
))
473 else if (prefix_match(CONNECTED_PREFIX(oi
->connected
),
474 (struct prefix
*)&addr
)) {
475 if ((match
== NULL
) || (match
->address
->prefixlen
476 < oi
->address
->prefixlen
))
484 static void ospf_if_reset_stats(struct ospf_interface
*oi
)
486 oi
->hello_in
= oi
->hello_out
= 0;
487 oi
->db_desc_in
= oi
->db_desc_out
= 0;
488 oi
->ls_req_in
= oi
->ls_req_out
= 0;
489 oi
->ls_upd_in
= oi
->ls_upd_out
= 0;
490 oi
->ls_ack_in
= oi
->ls_ack_out
= 0;
493 void ospf_if_stream_set(struct ospf_interface
*oi
)
495 /* set output fifo queue. */
496 if (oi
->obuf
== NULL
)
497 oi
->obuf
= ospf_fifo_new();
500 void ospf_if_stream_unset(struct ospf_interface
*oi
)
502 struct ospf
*ospf
= oi
->ospf
;
505 /* flush the interface packet queue */
506 ospf_fifo_flush(oi
->obuf
);
507 /*reset protocol stats */
508 ospf_if_reset_stats(oi
);
510 if (oi
->on_write_q
) {
511 listnode_delete(ospf
->oi_write_q
, oi
);
512 if (list_isempty(ospf
->oi_write_q
))
513 OSPF_TIMER_OFF(ospf
->t_write
);
520 static struct ospf_if_params
*ospf_new_if_params(void)
522 struct ospf_if_params
*oip
;
524 oip
= XCALLOC(MTYPE_OSPF_IF_PARAMS
, sizeof(struct ospf_if_params
));
529 UNSET_IF_PARAM(oip
, output_cost_cmd
);
530 UNSET_IF_PARAM(oip
, transmit_delay
);
531 UNSET_IF_PARAM(oip
, retransmit_interval
);
532 UNSET_IF_PARAM(oip
, passive_interface
);
533 UNSET_IF_PARAM(oip
, v_hello
);
534 UNSET_IF_PARAM(oip
, fast_hello
);
535 UNSET_IF_PARAM(oip
, v_wait
);
536 UNSET_IF_PARAM(oip
, priority
);
537 UNSET_IF_PARAM(oip
, type
);
538 UNSET_IF_PARAM(oip
, auth_simple
);
539 UNSET_IF_PARAM(oip
, auth_crypt
);
540 UNSET_IF_PARAM(oip
, auth_type
);
542 oip
->auth_crypt
= list_new();
544 oip
->network_lsa_seqnum
= htonl(OSPF_INITIAL_SEQUENCE_NUMBER
);
549 void ospf_del_if_params(struct ospf_if_params
*oip
)
551 list_delete_and_null(&oip
->auth_crypt
);
552 bfd_info_free(&(oip
->bfd_info
));
553 XFREE(MTYPE_OSPF_IF_PARAMS
, oip
);
556 void ospf_free_if_params(struct interface
*ifp
, struct in_addr addr
)
558 struct ospf_if_params
*oip
;
559 struct prefix_ipv4 p
;
560 struct route_node
*rn
;
563 p
.prefixlen
= IPV4_MAX_PREFIXLEN
;
565 rn
= route_node_lookup(IF_OIFS_PARAMS(ifp
), (struct prefix
*)&p
);
566 if (!rn
|| !rn
->info
)
570 route_unlock_node(rn
);
572 if (!OSPF_IF_PARAM_CONFIGURED(oip
, output_cost_cmd
)
573 && !OSPF_IF_PARAM_CONFIGURED(oip
, transmit_delay
)
574 && !OSPF_IF_PARAM_CONFIGURED(oip
, retransmit_interval
)
575 && !OSPF_IF_PARAM_CONFIGURED(oip
, passive_interface
)
576 && !OSPF_IF_PARAM_CONFIGURED(oip
, v_hello
)
577 && !OSPF_IF_PARAM_CONFIGURED(oip
, fast_hello
)
578 && !OSPF_IF_PARAM_CONFIGURED(oip
, v_wait
)
579 && !OSPF_IF_PARAM_CONFIGURED(oip
, priority
)
580 && !OSPF_IF_PARAM_CONFIGURED(oip
, type
)
581 && !OSPF_IF_PARAM_CONFIGURED(oip
, auth_simple
)
582 && !OSPF_IF_PARAM_CONFIGURED(oip
, auth_type
)
583 && listcount(oip
->auth_crypt
) == 0
584 && ntohl(oip
->network_lsa_seqnum
) != OSPF_INITIAL_SEQUENCE_NUMBER
) {
585 ospf_del_if_params(oip
);
587 route_unlock_node(rn
);
591 struct ospf_if_params
*ospf_lookup_if_params(struct interface
*ifp
,
594 struct prefix_ipv4 p
;
595 struct route_node
*rn
;
598 p
.prefixlen
= IPV4_MAX_PREFIXLEN
;
601 rn
= route_node_lookup(IF_OIFS_PARAMS(ifp
), (struct prefix
*)&p
);
604 route_unlock_node(rn
);
611 struct ospf_if_params
*ospf_get_if_params(struct interface
*ifp
,
614 struct prefix_ipv4 p
;
615 struct route_node
*rn
;
618 p
.prefixlen
= IPV4_MAX_PREFIXLEN
;
622 rn
= route_node_get(IF_OIFS_PARAMS(ifp
), (struct prefix
*)&p
);
624 if (rn
->info
== NULL
)
625 rn
->info
= ospf_new_if_params();
627 route_unlock_node(rn
);
632 void ospf_if_update_params(struct interface
*ifp
, struct in_addr addr
)
634 struct route_node
*rn
;
635 struct ospf_interface
*oi
;
637 for (rn
= route_top(IF_OIFS(ifp
)); rn
; rn
= route_next(rn
)) {
638 if ((oi
= rn
->info
) == NULL
)
641 if (IPV4_ADDR_SAME(&oi
->address
->u
.prefix4
, &addr
))
642 oi
->params
= ospf_lookup_if_params(
643 ifp
, oi
->address
->u
.prefix4
);
647 int ospf_if_new_hook(struct interface
*ifp
)
651 ifp
->info
= XCALLOC(MTYPE_OSPF_IF_INFO
, sizeof(struct ospf_if_info
));
653 IF_OIFS(ifp
) = route_table_init();
654 IF_OIFS_PARAMS(ifp
) = route_table_init();
656 IF_DEF_PARAMS(ifp
) = ospf_new_if_params();
658 SET_IF_PARAM(IF_DEF_PARAMS(ifp
), transmit_delay
);
659 IF_DEF_PARAMS(ifp
)->transmit_delay
= OSPF_TRANSMIT_DELAY_DEFAULT
;
661 SET_IF_PARAM(IF_DEF_PARAMS(ifp
), retransmit_interval
);
662 IF_DEF_PARAMS(ifp
)->retransmit_interval
=
663 OSPF_RETRANSMIT_INTERVAL_DEFAULT
;
665 SET_IF_PARAM(IF_DEF_PARAMS(ifp
), priority
);
666 IF_DEF_PARAMS(ifp
)->priority
= OSPF_ROUTER_PRIORITY_DEFAULT
;
668 IF_DEF_PARAMS(ifp
)->mtu_ignore
= OSPF_MTU_IGNORE_DEFAULT
;
670 SET_IF_PARAM(IF_DEF_PARAMS(ifp
), v_hello
);
671 IF_DEF_PARAMS(ifp
)->v_hello
= OSPF_HELLO_INTERVAL_DEFAULT
;
673 SET_IF_PARAM(IF_DEF_PARAMS(ifp
), fast_hello
);
674 IF_DEF_PARAMS(ifp
)->fast_hello
= OSPF_FAST_HELLO_DEFAULT
;
676 SET_IF_PARAM(IF_DEF_PARAMS(ifp
), v_wait
);
677 IF_DEF_PARAMS(ifp
)->v_wait
= OSPF_ROUTER_DEAD_INTERVAL_DEFAULT
;
679 SET_IF_PARAM(IF_DEF_PARAMS(ifp
), auth_simple
);
680 memset(IF_DEF_PARAMS(ifp
)->auth_simple
, 0, OSPF_AUTH_SIMPLE_SIZE
);
682 SET_IF_PARAM(IF_DEF_PARAMS(ifp
), auth_type
);
683 IF_DEF_PARAMS(ifp
)->auth_type
= OSPF_AUTH_NOTSET
;
685 rc
= ospf_opaque_new_if(ifp
);
689 static int ospf_if_delete_hook(struct interface
*ifp
)
692 struct route_node
*rn
;
693 rc
= ospf_opaque_del_if(ifp
);
695 route_table_finish(IF_OIFS(ifp
));
697 for (rn
= route_top(IF_OIFS_PARAMS(ifp
)); rn
; rn
= route_next(rn
))
699 ospf_del_if_params(rn
->info
);
700 route_table_finish(IF_OIFS_PARAMS(ifp
));
702 ospf_del_if_params((struct ospf_if_params
*)IF_DEF_PARAMS(ifp
));
703 XFREE(MTYPE_OSPF_IF_INFO
, ifp
->info
);
709 int ospf_if_is_enable(struct ospf_interface
*oi
)
711 if (!(if_is_loopback(oi
->ifp
) || if_is_vrf(oi
->ifp
)))
712 if (if_is_up(oi
->ifp
))
718 void ospf_if_set_multicast(struct ospf_interface
*oi
)
720 if ((oi
->state
> ISM_Loopback
) && (oi
->type
!= OSPF_IFTYPE_LOOPBACK
)
721 && (oi
->type
!= OSPF_IFTYPE_VIRTUALLINK
)
722 && (OSPF_IF_PASSIVE_STATUS(oi
) == OSPF_IF_ACTIVE
)) {
723 /* The interface should belong to the OSPF-all-routers group. */
724 if (!OI_MEMBER_CHECK(oi
, MEMBER_ALLROUTERS
)
725 && (ospf_if_add_allspfrouters(oi
->ospf
, oi
->address
,
728 /* Set the flag only if the system call to join
730 OI_MEMBER_JOINED(oi
, MEMBER_ALLROUTERS
);
732 /* The interface should NOT belong to the OSPF-all-routers
734 if (OI_MEMBER_CHECK(oi
, MEMBER_ALLROUTERS
)) {
735 /* Only actually drop if this is the last reference */
736 if (OI_MEMBER_COUNT(oi
, MEMBER_ALLROUTERS
) == 1)
737 ospf_if_drop_allspfrouters(oi
->ospf
,
740 /* Unset the flag regardless of whether the system call
742 the group succeeded, since it's much safer to assume
744 we are not a member. */
745 OI_MEMBER_LEFT(oi
, MEMBER_ALLROUTERS
);
749 if (((oi
->type
== OSPF_IFTYPE_BROADCAST
)
750 || (oi
->type
== OSPF_IFTYPE_POINTOPOINT
))
751 && ((oi
->state
== ISM_DR
) || (oi
->state
== ISM_Backup
))
752 && (OSPF_IF_PASSIVE_STATUS(oi
) == OSPF_IF_ACTIVE
)) {
753 /* The interface should belong to the OSPF-designated-routers
755 if (!OI_MEMBER_CHECK(oi
, MEMBER_DROUTERS
)
756 && (ospf_if_add_alldrouters(oi
->ospf
, oi
->address
,
759 /* Set the flag only if the system call to join
761 OI_MEMBER_JOINED(oi
, MEMBER_DROUTERS
);
763 /* The interface should NOT belong to the
764 * OSPF-designated-routers group */
765 if (OI_MEMBER_CHECK(oi
, MEMBER_DROUTERS
)) {
766 /* drop only if last reference */
767 if (OI_MEMBER_COUNT(oi
, MEMBER_DROUTERS
) == 1)
768 ospf_if_drop_alldrouters(oi
->ospf
, oi
->address
,
771 /* Unset the flag regardless of whether the system call
773 the group succeeded, since it's much safer to assume
775 we are not a member. */
776 OI_MEMBER_LEFT(oi
, MEMBER_DROUTERS
);
781 int ospf_if_up(struct ospf_interface
*oi
)
786 if (oi
->type
== OSPF_IFTYPE_LOOPBACK
)
787 OSPF_ISM_EVENT_SCHEDULE(oi
, ISM_LoopInd
);
789 OSPF_ISM_EVENT_SCHEDULE(oi
, ISM_InterfaceUp
);
795 int ospf_if_down(struct ospf_interface
*oi
)
800 OSPF_ISM_EVENT_EXECUTE(oi
, ISM_InterfaceDown
);
801 /* delete position in router LSA */
804 /* Shutdown packet reception and sending */
805 ospf_if_stream_unset(oi
);
811 /* Virtual Link related functions. */
813 struct ospf_vl_data
*ospf_vl_data_new(struct ospf_area
*area
,
814 struct in_addr vl_peer
)
816 struct ospf_vl_data
*vl_data
;
818 vl_data
= XCALLOC(MTYPE_OSPF_VL_DATA
, sizeof(struct ospf_vl_data
));
820 vl_data
->vl_peer
.s_addr
= vl_peer
.s_addr
;
821 vl_data
->vl_area_id
= area
->area_id
;
822 vl_data
->vl_area_id_fmt
= area
->area_id_fmt
;
827 void ospf_vl_data_free(struct ospf_vl_data
*vl_data
)
829 XFREE(MTYPE_OSPF_VL_DATA
, vl_data
);
832 unsigned int vlink_count
= 0;
834 struct ospf_interface
*ospf_vl_new(struct ospf
*ospf
,
835 struct ospf_vl_data
*vl_data
)
837 struct ospf_interface
*voi
;
838 struct interface
*vi
;
839 char ifname
[INTERFACE_NAMSIZ
];
840 struct ospf_area
*area
;
841 struct in_addr area_id
;
842 struct connected
*co
;
843 struct prefix_ipv4
*p
;
845 if (IS_DEBUG_OSPF_EVENT
)
846 zlog_debug("ospf_vl_new(): Start");
847 if (vlink_count
== OSPF_VL_MAX_COUNT
) {
848 if (IS_DEBUG_OSPF_EVENT
)
850 "ospf_vl_new(): Alarm: "
851 "cannot create more than OSPF_MAX_VL_COUNT virtual links");
855 if (IS_DEBUG_OSPF_EVENT
)
857 "ospf_vl_new(): creating pseudo zebra interface vrf id %u",
860 snprintf(ifname
, sizeof(ifname
), "VLINK%d", vlink_count
);
861 vi
= if_create(ifname
, ospf
->vrf_id
);
863 * if_create sets ZEBRA_INTERFACE_LINKDETECTION
864 * virtual links don't need this.
866 UNSET_FLAG(vi
->status
, ZEBRA_INTERFACE_LINKDETECTION
);
867 co
= connected_new();
869 listnode_add(vi
->connected
, co
);
871 p
= prefix_ipv4_new();
873 p
->prefix
.s_addr
= 0;
876 co
->address
= (struct prefix
*)p
;
878 voi
= ospf_if_new(ospf
, vi
, co
->address
);
880 if (IS_DEBUG_OSPF_EVENT
)
882 "ospf_vl_new(): Alarm: OSPF int structure is not created");
886 voi
->vl_data
= vl_data
;
887 voi
->ifp
->mtu
= OSPF_VL_MTU
;
888 voi
->type
= OSPF_IFTYPE_VIRTUALLINK
;
891 if (IS_DEBUG_OSPF_EVENT
)
892 zlog_debug("ospf_vl_new(): Created name: %s", ifname
);
893 if (IS_DEBUG_OSPF_EVENT
)
894 zlog_debug("ospf_vl_new(): set if->name to %s", vi
->name
);
897 area
= ospf_area_get(ospf
, area_id
);
900 if (IS_DEBUG_OSPF_EVENT
)
902 "ospf_vl_new(): set associated area to the backbone");
904 /* Add pseudo neighbor. */
905 ospf_nbr_self_reset(voi
, voi
->ospf
->router_id
);
907 ospf_area_add_if(voi
->area
, voi
);
909 ospf_if_stream_set(voi
);
911 if (IS_DEBUG_OSPF_EVENT
)
912 zlog_debug("ospf_vl_new(): Stop");
916 static void ospf_vl_if_delete(struct ospf_vl_data
*vl_data
)
918 struct interface
*ifp
= vl_data
->vl_oi
->ifp
;
919 vl_data
->vl_oi
->address
->u
.prefix4
.s_addr
= 0;
920 vl_data
->vl_oi
->address
->prefixlen
= 0;
921 ospf_if_free(vl_data
->vl_oi
);
926 /* Look up vl_data for given peer, optionally qualified to be in the
927 * specified area. NULL area returns first found..
929 struct ospf_vl_data
*ospf_vl_lookup(struct ospf
*ospf
, struct ospf_area
*area
,
930 struct in_addr vl_peer
)
932 struct ospf_vl_data
*vl_data
;
933 struct listnode
*node
;
935 if (IS_DEBUG_OSPF_EVENT
) {
936 zlog_debug("%s: Looking for %s", __func__
, inet_ntoa(vl_peer
));
938 zlog_debug("%s: in area %s", __func__
,
939 inet_ntoa(area
->area_id
));
942 for (ALL_LIST_ELEMENTS_RO(ospf
->vlinks
, node
, vl_data
)) {
943 if (IS_DEBUG_OSPF_EVENT
)
944 zlog_debug("%s: VL %s, peer %s", __func__
,
945 vl_data
->vl_oi
->ifp
->name
,
946 inet_ntoa(vl_data
->vl_peer
));
949 && !IPV4_ADDR_SAME(&vl_data
->vl_area_id
, &area
->area_id
))
952 if (IPV4_ADDR_SAME(&vl_data
->vl_peer
, &vl_peer
))
959 static void ospf_vl_shutdown(struct ospf_vl_data
*vl_data
)
961 struct ospf_interface
*oi
;
963 if ((oi
= vl_data
->vl_oi
) == NULL
)
966 oi
->address
->u
.prefix4
.s_addr
= 0;
967 oi
->address
->prefixlen
= 0;
969 UNSET_FLAG(oi
->ifp
->flags
, IFF_UP
);
970 /* OSPF_ISM_EVENT_SCHEDULE (oi, ISM_InterfaceDown); */
971 OSPF_ISM_EVENT_EXECUTE(oi
, ISM_InterfaceDown
);
974 void ospf_vl_add(struct ospf
*ospf
, struct ospf_vl_data
*vl_data
)
976 listnode_add(ospf
->vlinks
, vl_data
);
977 hook_call(ospf_vl_add
, vl_data
);
980 void ospf_vl_delete(struct ospf
*ospf
, struct ospf_vl_data
*vl_data
)
982 ospf_vl_shutdown(vl_data
);
983 ospf_vl_if_delete(vl_data
);
985 hook_call(ospf_vl_delete
, vl_data
);
986 listnode_delete(ospf
->vlinks
, vl_data
);
988 ospf_vl_data_free(vl_data
);
991 static int ospf_vl_set_params(struct ospf_vl_data
*vl_data
, struct vertex
*v
)
994 struct ospf_interface
*voi
;
995 struct listnode
*node
;
996 struct vertex_parent
*vp
= NULL
;
998 struct router_lsa
*rl
;
1000 voi
= vl_data
->vl_oi
;
1002 if (voi
->output_cost
!= v
->distance
) {
1004 voi
->output_cost
= v
->distance
;
1008 for (ALL_LIST_ELEMENTS_RO(v
->parents
, node
, vp
)) {
1009 vl_data
->nexthop
.oi
= vp
->nexthop
->oi
;
1010 vl_data
->nexthop
.router
= vp
->nexthop
->router
;
1012 if (!IPV4_ADDR_SAME(&voi
->address
->u
.prefix4
,
1013 &vl_data
->nexthop
.oi
->address
->u
.prefix4
))
1016 voi
->address
->u
.prefix4
=
1017 vl_data
->nexthop
.oi
->address
->u
.prefix4
;
1018 voi
->address
->prefixlen
=
1019 vl_data
->nexthop
.oi
->address
->prefixlen
;
1021 break; /* We take the first interface. */
1024 rl
= (struct router_lsa
*)v
->lsa
;
1026 /* use SPF determined backlink index in struct vertex
1027 * for virtual link destination address
1029 if (vp
&& vp
->backlink
>= 0) {
1030 if (!IPV4_ADDR_SAME(&vl_data
->peer_addr
,
1031 &rl
->link
[vp
->backlink
].link_data
))
1033 vl_data
->peer_addr
= rl
->link
[vp
->backlink
].link_data
;
1035 /* This is highly odd, there is no backlink index
1036 * there should be due to the ospf_spf_has_link() check
1037 * in SPF. Lets warn and try pick a link anyway.
1039 zlog_warn("ospf_vl_set_params: No backlink for %s!",
1040 vl_data
->vl_oi
->ifp
->name
);
1041 for (i
= 0; i
< ntohs(rl
->links
); i
++) {
1042 switch (rl
->link
[i
].type
) {
1043 case LSA_LINK_TYPE_VIRTUALLINK
:
1044 if (IS_DEBUG_OSPF_EVENT
)
1046 "found back link through VL");
1048 case LSA_LINK_TYPE_TRANSIT
:
1049 case LSA_LINK_TYPE_POINTOPOINT
:
1050 if (!IPV4_ADDR_SAME(&vl_data
->peer_addr
,
1051 &rl
->link
[i
].link_data
))
1053 vl_data
->peer_addr
= rl
->link
[i
].link_data
;
1058 if (IS_DEBUG_OSPF_EVENT
)
1059 zlog_debug("%s: %s peer address: %s, cost: %d,%schanged",
1060 __func__
, vl_data
->vl_oi
->ifp
->name
,
1061 inet_ntoa(vl_data
->peer_addr
), voi
->output_cost
,
1062 (changed
? " " : " un"));
1068 void ospf_vl_up_check(struct ospf_area
*area
, struct in_addr rid
,
1071 struct ospf
*ospf
= area
->ospf
;
1072 struct listnode
*node
;
1073 struct ospf_vl_data
*vl_data
;
1074 struct ospf_interface
*oi
;
1076 if (IS_DEBUG_OSPF_EVENT
) {
1077 zlog_debug("ospf_vl_up_check(): Start");
1078 zlog_debug("ospf_vl_up_check(): Router ID is %s",
1080 zlog_debug("ospf_vl_up_check(): Area is %s",
1081 inet_ntoa(area
->area_id
));
1084 for (ALL_LIST_ELEMENTS_RO(ospf
->vlinks
, node
, vl_data
)) {
1085 if (IS_DEBUG_OSPF_EVENT
) {
1086 zlog_debug("%s: considering VL, %s in area %s",
1087 __func__
, vl_data
->vl_oi
->ifp
->name
,
1088 inet_ntoa(vl_data
->vl_area_id
));
1089 zlog_debug("%s: peer ID: %s", __func__
,
1090 inet_ntoa(vl_data
->vl_peer
));
1093 if (IPV4_ADDR_SAME(&vl_data
->vl_peer
, &rid
)
1094 && IPV4_ADDR_SAME(&vl_data
->vl_area_id
, &area
->area_id
)) {
1095 oi
= vl_data
->vl_oi
;
1096 SET_FLAG(vl_data
->flags
, OSPF_VL_FLAG_APPROVED
);
1098 if (IS_DEBUG_OSPF_EVENT
)
1100 "ospf_vl_up_check(): this VL matched");
1102 if (oi
->state
== ISM_Down
) {
1103 if (IS_DEBUG_OSPF_EVENT
)
1105 "ospf_vl_up_check(): VL is down, waking it up");
1106 SET_FLAG(oi
->ifp
->flags
, IFF_UP
);
1107 OSPF_ISM_EVENT_EXECUTE(oi
, ISM_InterfaceUp
);
1110 if (ospf_vl_set_params(vl_data
, v
)) {
1111 if (IS_DEBUG_OSPF(ism
, ISM_EVENTS
))
1113 "ospf_vl_up_check: VL cost change,"
1114 " scheduling router lsa refresh");
1116 ospf_router_lsa_update_area(
1118 else if (IS_DEBUG_OSPF(ism
, ISM_EVENTS
))
1120 "ospf_vl_up_check: VL cost change, no backbone!");
1126 void ospf_vl_unapprove(struct ospf
*ospf
)
1128 struct listnode
*node
;
1129 struct ospf_vl_data
*vl_data
;
1131 for (ALL_LIST_ELEMENTS_RO(ospf
->vlinks
, node
, vl_data
))
1132 UNSET_FLAG(vl_data
->flags
, OSPF_VL_FLAG_APPROVED
);
1135 void ospf_vl_shut_unapproved(struct ospf
*ospf
)
1137 struct listnode
*node
, *nnode
;
1138 struct ospf_vl_data
*vl_data
;
1140 for (ALL_LIST_ELEMENTS(ospf
->vlinks
, node
, nnode
, vl_data
))
1141 if (!CHECK_FLAG(vl_data
->flags
, OSPF_VL_FLAG_APPROVED
))
1142 ospf_vl_shutdown(vl_data
);
1145 int ospf_full_virtual_nbrs(struct ospf_area
*area
)
1147 if (IS_DEBUG_OSPF_EVENT
) {
1149 "counting fully adjacent virtual neighbors in area %s",
1150 inet_ntoa(area
->area_id
));
1151 zlog_debug("there are %d of them", area
->full_vls
);
1154 return area
->full_vls
;
1157 int ospf_vls_in_area(struct ospf_area
*area
)
1159 struct listnode
*node
;
1160 struct ospf_vl_data
*vl_data
;
1163 for (ALL_LIST_ELEMENTS_RO(area
->ospf
->vlinks
, node
, vl_data
))
1164 if (IPV4_ADDR_SAME(&vl_data
->vl_area_id
, &area
->area_id
))
1171 struct crypt_key
*ospf_crypt_key_new()
1173 return XCALLOC(MTYPE_OSPF_CRYPT_KEY
, sizeof(struct crypt_key
));
1176 void ospf_crypt_key_add(struct list
*crypt
, struct crypt_key
*ck
)
1178 listnode_add(crypt
, ck
);
1181 struct crypt_key
*ospf_crypt_key_lookup(struct list
*auth_crypt
, uint8_t key_id
)
1183 struct listnode
*node
;
1184 struct crypt_key
*ck
;
1186 for (ALL_LIST_ELEMENTS_RO(auth_crypt
, node
, ck
))
1187 if (ck
->key_id
== key_id
)
1193 int ospf_crypt_key_delete(struct list
*auth_crypt
, uint8_t key_id
)
1195 struct listnode
*node
, *nnode
;
1196 struct crypt_key
*ck
;
1198 for (ALL_LIST_ELEMENTS(auth_crypt
, node
, nnode
, ck
)) {
1199 if (ck
->key_id
== key_id
) {
1200 listnode_delete(auth_crypt
, ck
);
1201 XFREE(MTYPE_OSPF_CRYPT_KEY
, ck
);
1209 uint8_t ospf_default_iftype(struct interface
*ifp
)
1211 if (if_is_pointopoint(ifp
))
1212 return OSPF_IFTYPE_POINTOPOINT
;
1213 else if (if_is_loopback(ifp
) || if_is_vrf(ifp
))
1214 return OSPF_IFTYPE_LOOPBACK
;
1216 return OSPF_IFTYPE_BROADCAST
;
1221 /* Initialize Zebra interface data structure. */
1222 hook_register_prio(if_add
, 0, ospf_if_new_hook
);
1223 hook_register_prio(if_del
, 0, ospf_if_delete_hook
);