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 oi
= ospf_if_table_lookup(ifp
, p
);
232 oi
= XCALLOC(MTYPE_OSPF_IF
, sizeof(struct ospf_interface
));
234 oi
->obuf
= ospf_fifo_new();
236 /* Set zebra interface pointer. */
240 ospf_add_to_if(ifp
, oi
);
241 listnode_add(ospf
->oiflist
, oi
);
243 /* Initialize neighbor list. */
244 oi
->nbrs
= route_table_init();
246 /* Initialize static neighbor list. */
247 oi
->nbr_nbma
= list_new();
249 /* Initialize Link State Acknowledgment list. */
250 oi
->ls_ack
= list_new();
251 oi
->ls_ack_direct
.ls_ack
= list_new();
253 /* Set default values. */
254 ospf_if_reset_variables(oi
);
256 /* Set pseudo neighbor to Null */
259 oi
->ls_upd_queue
= route_table_init();
260 oi
->t_ls_upd_event
= NULL
;
261 oi
->t_ls_ack_direct
= NULL
;
263 oi
->crypt_seqnum
= time(NULL
);
265 ospf_opaque_type9_lsa_init(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
)
328 ospf_fifo_free(oi
->obuf
);
330 assert(oi
->state
== ISM_Down
);
332 ospf_opaque_type9_lsa_term(oi
);
336 /* Free Pseudo Neighbour */
337 ospf_nbr_delete(oi
->nbr_self
);
339 route_table_finish(oi
->nbrs
);
340 route_table_finish(oi
->ls_upd_queue
);
342 /* Free any lists that should be freed */
343 list_delete(&oi
->nbr_nbma
);
345 list_delete(&oi
->ls_ack
);
346 list_delete(&oi
->ls_ack_direct
.ls_ack
);
348 if (IS_DEBUG_OSPF_EVENT
)
349 zlog_debug("%s: ospf interface %s vrf %s id %u deleted",
350 __PRETTY_FUNCTION__
, oi
->ifp
->name
,
351 ospf_vrf_id_to_name(oi
->ifp
->vrf_id
),
354 ospf_delete_from_if(oi
->ifp
, oi
);
356 listnode_delete(oi
->ospf
->oiflist
, oi
);
357 listnode_delete(oi
->area
->oiflist
, oi
);
359 thread_cancel_event(master
, oi
);
361 memset(oi
, 0, sizeof(*oi
));
362 XFREE(MTYPE_OSPF_IF
, oi
);
365 int ospf_if_is_up(struct ospf_interface
*oi
)
367 return if_is_up(oi
->ifp
);
370 struct ospf_interface
*ospf_if_exists(struct ospf_interface
*oic
)
372 struct listnode
*node
;
374 struct ospf_interface
*oi
;
383 for (ALL_LIST_ELEMENTS_RO(ospf
->oiflist
, node
, oi
))
390 /* Lookup OSPF interface by router LSA posistion */
391 struct ospf_interface
*ospf_if_lookup_by_lsa_pos(struct ospf_area
*area
,
394 struct listnode
*node
;
395 struct ospf_interface
*oi
;
397 for (ALL_LIST_ELEMENTS_RO(area
->oiflist
, node
, oi
)) {
398 if (lsa_pos
>= oi
->lsa_pos_beg
&& lsa_pos
< oi
->lsa_pos_end
)
404 struct ospf_interface
*ospf_if_lookup_by_local_addr(struct ospf
*ospf
,
405 struct interface
*ifp
,
406 struct in_addr address
)
408 struct listnode
*node
;
409 struct ospf_interface
*oi
;
411 for (ALL_LIST_ELEMENTS_RO(ospf
->oiflist
, node
, oi
))
412 if (oi
->type
!= OSPF_IFTYPE_VIRTUALLINK
) {
413 if (ifp
&& oi
->ifp
!= ifp
)
416 if (IPV4_ADDR_SAME(&address
, &oi
->address
->u
.prefix4
))
423 struct ospf_interface
*ospf_if_lookup_by_prefix(struct ospf
*ospf
,
424 struct prefix_ipv4
*p
)
426 struct listnode
*node
;
427 struct ospf_interface
*oi
;
429 /* Check each Interface. */
430 for (ALL_LIST_ELEMENTS_RO(ospf
->oiflist
, node
, oi
)) {
431 if (oi
->type
!= OSPF_IFTYPE_VIRTUALLINK
) {
434 prefix_copy(&ptmp
, CONNECTED_PREFIX(oi
->connected
));
436 if (prefix_same(&ptmp
, (struct prefix
*)p
))
443 /* determine receiving interface by ifp and source address */
444 struct ospf_interface
*ospf_if_lookup_recv_if(struct ospf
*ospf
,
446 struct interface
*ifp
)
448 struct route_node
*rn
;
449 struct prefix_ipv4 addr
;
450 struct ospf_interface
*oi
, *match
;
452 addr
.family
= AF_INET
;
454 addr
.prefixlen
= IPV4_MAX_BITLEN
;
458 for (rn
= route_top(IF_OIFS(ifp
)); rn
; rn
= route_next(rn
)) {
461 if (!oi
) /* oi can be NULL for PtP aliases */
464 if (oi
->type
== OSPF_IFTYPE_VIRTUALLINK
)
467 if (if_is_loopback(oi
->ifp
) || if_is_vrf(oi
->ifp
))
470 if (CHECK_FLAG(oi
->connected
->flags
, ZEBRA_IFA_UNNUMBERED
))
472 else if (prefix_match(CONNECTED_PREFIX(oi
->connected
),
473 (struct prefix
*)&addr
)) {
474 if ((match
== NULL
) || (match
->address
->prefixlen
475 < oi
->address
->prefixlen
))
483 static void ospf_if_reset_stats(struct ospf_interface
*oi
)
485 oi
->hello_in
= oi
->hello_out
= 0;
486 oi
->db_desc_in
= oi
->db_desc_out
= 0;
487 oi
->ls_req_in
= oi
->ls_req_out
= 0;
488 oi
->ls_upd_in
= oi
->ls_upd_out
= 0;
489 oi
->ls_ack_in
= oi
->ls_ack_out
= 0;
492 void ospf_if_stream_unset(struct ospf_interface
*oi
)
494 struct ospf
*ospf
= oi
->ospf
;
496 /* flush the interface packet queue */
497 ospf_fifo_flush(oi
->obuf
);
498 /*reset protocol stats */
499 ospf_if_reset_stats(oi
);
501 if (oi
->on_write_q
) {
502 listnode_delete(ospf
->oi_write_q
, oi
);
503 if (list_isempty(ospf
->oi_write_q
))
504 OSPF_TIMER_OFF(ospf
->t_write
);
510 static struct ospf_if_params
*ospf_new_if_params(void)
512 struct ospf_if_params
*oip
;
514 oip
= XCALLOC(MTYPE_OSPF_IF_PARAMS
, sizeof(struct ospf_if_params
));
516 UNSET_IF_PARAM(oip
, output_cost_cmd
);
517 UNSET_IF_PARAM(oip
, transmit_delay
);
518 UNSET_IF_PARAM(oip
, retransmit_interval
);
519 UNSET_IF_PARAM(oip
, passive_interface
);
520 UNSET_IF_PARAM(oip
, v_hello
);
521 UNSET_IF_PARAM(oip
, fast_hello
);
522 UNSET_IF_PARAM(oip
, v_wait
);
523 UNSET_IF_PARAM(oip
, priority
);
524 UNSET_IF_PARAM(oip
, type
);
525 UNSET_IF_PARAM(oip
, auth_simple
);
526 UNSET_IF_PARAM(oip
, auth_crypt
);
527 UNSET_IF_PARAM(oip
, auth_type
);
529 oip
->auth_crypt
= list_new();
531 oip
->network_lsa_seqnum
= htonl(OSPF_INITIAL_SEQUENCE_NUMBER
);
536 void ospf_del_if_params(struct ospf_if_params
*oip
)
538 list_delete(&oip
->auth_crypt
);
539 bfd_info_free(&(oip
->bfd_info
));
540 XFREE(MTYPE_OSPF_IF_PARAMS
, oip
);
543 void ospf_free_if_params(struct interface
*ifp
, struct in_addr addr
)
545 struct ospf_if_params
*oip
;
546 struct prefix_ipv4 p
;
547 struct route_node
*rn
;
550 p
.prefixlen
= IPV4_MAX_PREFIXLEN
;
552 rn
= route_node_lookup(IF_OIFS_PARAMS(ifp
), (struct prefix
*)&p
);
553 if (!rn
|| !rn
->info
)
557 route_unlock_node(rn
);
559 if (!OSPF_IF_PARAM_CONFIGURED(oip
, output_cost_cmd
)
560 && !OSPF_IF_PARAM_CONFIGURED(oip
, transmit_delay
)
561 && !OSPF_IF_PARAM_CONFIGURED(oip
, retransmit_interval
)
562 && !OSPF_IF_PARAM_CONFIGURED(oip
, passive_interface
)
563 && !OSPF_IF_PARAM_CONFIGURED(oip
, v_hello
)
564 && !OSPF_IF_PARAM_CONFIGURED(oip
, fast_hello
)
565 && !OSPF_IF_PARAM_CONFIGURED(oip
, v_wait
)
566 && !OSPF_IF_PARAM_CONFIGURED(oip
, priority
)
567 && !OSPF_IF_PARAM_CONFIGURED(oip
, type
)
568 && !OSPF_IF_PARAM_CONFIGURED(oip
, auth_simple
)
569 && !OSPF_IF_PARAM_CONFIGURED(oip
, auth_type
)
570 && listcount(oip
->auth_crypt
) == 0
571 && ntohl(oip
->network_lsa_seqnum
) != OSPF_INITIAL_SEQUENCE_NUMBER
) {
572 ospf_del_if_params(oip
);
574 route_unlock_node(rn
);
578 struct ospf_if_params
*ospf_lookup_if_params(struct interface
*ifp
,
581 struct prefix_ipv4 p
;
582 struct route_node
*rn
;
585 p
.prefixlen
= IPV4_MAX_PREFIXLEN
;
588 rn
= route_node_lookup(IF_OIFS_PARAMS(ifp
), (struct prefix
*)&p
);
591 route_unlock_node(rn
);
598 struct ospf_if_params
*ospf_get_if_params(struct interface
*ifp
,
601 struct prefix_ipv4 p
;
602 struct route_node
*rn
;
605 p
.prefixlen
= IPV4_MAX_PREFIXLEN
;
609 rn
= route_node_get(IF_OIFS_PARAMS(ifp
), (struct prefix
*)&p
);
611 if (rn
->info
== NULL
)
612 rn
->info
= ospf_new_if_params();
614 route_unlock_node(rn
);
619 void ospf_if_update_params(struct interface
*ifp
, struct in_addr addr
)
621 struct route_node
*rn
;
622 struct ospf_interface
*oi
;
624 for (rn
= route_top(IF_OIFS(ifp
)); rn
; rn
= route_next(rn
)) {
625 if ((oi
= rn
->info
) == NULL
)
628 if (IPV4_ADDR_SAME(&oi
->address
->u
.prefix4
, &addr
))
629 oi
->params
= ospf_lookup_if_params(
630 ifp
, oi
->address
->u
.prefix4
);
634 int ospf_if_new_hook(struct interface
*ifp
)
638 ifp
->info
= XCALLOC(MTYPE_OSPF_IF_INFO
, sizeof(struct ospf_if_info
));
640 IF_OIFS(ifp
) = route_table_init();
641 IF_OIFS_PARAMS(ifp
) = route_table_init();
643 IF_DEF_PARAMS(ifp
) = ospf_new_if_params();
645 SET_IF_PARAM(IF_DEF_PARAMS(ifp
), transmit_delay
);
646 IF_DEF_PARAMS(ifp
)->transmit_delay
= OSPF_TRANSMIT_DELAY_DEFAULT
;
648 SET_IF_PARAM(IF_DEF_PARAMS(ifp
), retransmit_interval
);
649 IF_DEF_PARAMS(ifp
)->retransmit_interval
=
650 OSPF_RETRANSMIT_INTERVAL_DEFAULT
;
652 SET_IF_PARAM(IF_DEF_PARAMS(ifp
), priority
);
653 IF_DEF_PARAMS(ifp
)->priority
= OSPF_ROUTER_PRIORITY_DEFAULT
;
655 IF_DEF_PARAMS(ifp
)->mtu_ignore
= OSPF_MTU_IGNORE_DEFAULT
;
657 SET_IF_PARAM(IF_DEF_PARAMS(ifp
), v_hello
);
658 IF_DEF_PARAMS(ifp
)->v_hello
= OSPF_HELLO_INTERVAL_DEFAULT
;
660 SET_IF_PARAM(IF_DEF_PARAMS(ifp
), fast_hello
);
661 IF_DEF_PARAMS(ifp
)->fast_hello
= OSPF_FAST_HELLO_DEFAULT
;
663 SET_IF_PARAM(IF_DEF_PARAMS(ifp
), v_wait
);
664 IF_DEF_PARAMS(ifp
)->v_wait
= OSPF_ROUTER_DEAD_INTERVAL_DEFAULT
;
666 SET_IF_PARAM(IF_DEF_PARAMS(ifp
), auth_simple
);
667 memset(IF_DEF_PARAMS(ifp
)->auth_simple
, 0, OSPF_AUTH_SIMPLE_SIZE
);
669 SET_IF_PARAM(IF_DEF_PARAMS(ifp
), auth_type
);
670 IF_DEF_PARAMS(ifp
)->auth_type
= OSPF_AUTH_NOTSET
;
672 rc
= ospf_opaque_new_if(ifp
);
676 static int ospf_if_delete_hook(struct interface
*ifp
)
679 struct route_node
*rn
;
680 rc
= ospf_opaque_del_if(ifp
);
682 route_table_finish(IF_OIFS(ifp
));
684 for (rn
= route_top(IF_OIFS_PARAMS(ifp
)); rn
; rn
= route_next(rn
))
686 ospf_del_if_params(rn
->info
);
687 route_table_finish(IF_OIFS_PARAMS(ifp
));
689 ospf_del_if_params((struct ospf_if_params
*)IF_DEF_PARAMS(ifp
));
690 XFREE(MTYPE_OSPF_IF_INFO
, ifp
->info
);
696 int ospf_if_is_enable(struct ospf_interface
*oi
)
698 if (!(if_is_loopback(oi
->ifp
) || if_is_vrf(oi
->ifp
)))
699 if (if_is_up(oi
->ifp
))
705 void ospf_if_set_multicast(struct ospf_interface
*oi
)
707 if ((oi
->state
> ISM_Loopback
) && (oi
->type
!= OSPF_IFTYPE_LOOPBACK
)
708 && (oi
->type
!= OSPF_IFTYPE_VIRTUALLINK
)
709 && (OSPF_IF_PASSIVE_STATUS(oi
) == OSPF_IF_ACTIVE
)) {
710 /* The interface should belong to the OSPF-all-routers group. */
711 if (!OI_MEMBER_CHECK(oi
, MEMBER_ALLROUTERS
)
712 && (ospf_if_add_allspfrouters(oi
->ospf
, oi
->address
,
715 /* Set the flag only if the system call to join
717 OI_MEMBER_JOINED(oi
, MEMBER_ALLROUTERS
);
719 /* The interface should NOT belong to the OSPF-all-routers
721 if (OI_MEMBER_CHECK(oi
, MEMBER_ALLROUTERS
)) {
722 /* Only actually drop if this is the last reference */
723 if (OI_MEMBER_COUNT(oi
, MEMBER_ALLROUTERS
) == 1)
724 ospf_if_drop_allspfrouters(oi
->ospf
,
727 /* Unset the flag regardless of whether the system call
729 the group succeeded, since it's much safer to assume
731 we are not a member. */
732 OI_MEMBER_LEFT(oi
, MEMBER_ALLROUTERS
);
736 if (((oi
->type
== OSPF_IFTYPE_BROADCAST
)
737 || (oi
->type
== OSPF_IFTYPE_POINTOPOINT
))
738 && ((oi
->state
== ISM_DR
) || (oi
->state
== ISM_Backup
))
739 && (OSPF_IF_PASSIVE_STATUS(oi
) == OSPF_IF_ACTIVE
)) {
740 /* The interface should belong to the OSPF-designated-routers
742 if (!OI_MEMBER_CHECK(oi
, MEMBER_DROUTERS
)
743 && (ospf_if_add_alldrouters(oi
->ospf
, oi
->address
,
746 /* Set the flag only if the system call to join
748 OI_MEMBER_JOINED(oi
, MEMBER_DROUTERS
);
750 /* The interface should NOT belong to the
751 * OSPF-designated-routers group */
752 if (OI_MEMBER_CHECK(oi
, MEMBER_DROUTERS
)) {
753 /* drop only if last reference */
754 if (OI_MEMBER_COUNT(oi
, MEMBER_DROUTERS
) == 1)
755 ospf_if_drop_alldrouters(oi
->ospf
, oi
->address
,
758 /* Unset the flag regardless of whether the system call
760 the group succeeded, since it's much safer to assume
762 we are not a member. */
763 OI_MEMBER_LEFT(oi
, MEMBER_DROUTERS
);
768 int ospf_if_up(struct ospf_interface
*oi
)
773 if (oi
->type
== OSPF_IFTYPE_LOOPBACK
)
774 OSPF_ISM_EVENT_SCHEDULE(oi
, ISM_LoopInd
);
776 OSPF_ISM_EVENT_SCHEDULE(oi
, ISM_InterfaceUp
);
782 int ospf_if_down(struct ospf_interface
*oi
)
787 OSPF_ISM_EVENT_EXECUTE(oi
, ISM_InterfaceDown
);
788 /* delete position in router LSA */
791 /* Shutdown packet reception and sending */
792 ospf_if_stream_unset(oi
);
798 /* Virtual Link related functions. */
800 struct ospf_vl_data
*ospf_vl_data_new(struct ospf_area
*area
,
801 struct in_addr vl_peer
)
803 struct ospf_vl_data
*vl_data
;
805 vl_data
= XCALLOC(MTYPE_OSPF_VL_DATA
, sizeof(struct ospf_vl_data
));
807 vl_data
->vl_peer
.s_addr
= vl_peer
.s_addr
;
808 vl_data
->vl_area_id
= area
->area_id
;
809 vl_data
->vl_area_id_fmt
= area
->area_id_fmt
;
814 void ospf_vl_data_free(struct ospf_vl_data
*vl_data
)
816 XFREE(MTYPE_OSPF_VL_DATA
, vl_data
);
819 unsigned int vlink_count
= 0;
821 struct ospf_interface
*ospf_vl_new(struct ospf
*ospf
,
822 struct ospf_vl_data
*vl_data
)
824 struct ospf_interface
*voi
;
825 struct interface
*vi
;
826 char ifname
[INTERFACE_NAMSIZ
];
827 struct ospf_area
*area
;
828 struct in_addr area_id
;
829 struct connected
*co
;
830 struct prefix_ipv4
*p
;
832 if (IS_DEBUG_OSPF_EVENT
)
833 zlog_debug("ospf_vl_new(): Start");
834 if (vlink_count
== OSPF_VL_MAX_COUNT
) {
835 if (IS_DEBUG_OSPF_EVENT
)
837 "ospf_vl_new(): Alarm: "
838 "cannot create more than OSPF_MAX_VL_COUNT virtual links");
842 if (IS_DEBUG_OSPF_EVENT
)
844 "ospf_vl_new(): creating pseudo zebra interface vrf id %u",
847 snprintf(ifname
, sizeof(ifname
), "VLINK%u", vlink_count
);
848 vi
= if_create(ifname
, ospf
->vrf_id
);
850 * if_create sets ZEBRA_INTERFACE_LINKDETECTION
851 * virtual links don't need this.
853 UNSET_FLAG(vi
->status
, ZEBRA_INTERFACE_LINKDETECTION
);
854 co
= connected_new();
856 listnode_add(vi
->connected
, co
);
858 p
= prefix_ipv4_new();
860 p
->prefix
.s_addr
= 0;
863 co
->address
= (struct prefix
*)p
;
865 voi
= ospf_if_new(ospf
, vi
, co
->address
);
867 if (IS_DEBUG_OSPF_EVENT
)
869 "ospf_vl_new(): Alarm: OSPF int structure is not created");
873 voi
->vl_data
= vl_data
;
874 voi
->ifp
->mtu
= OSPF_VL_MTU
;
875 voi
->type
= OSPF_IFTYPE_VIRTUALLINK
;
878 if (IS_DEBUG_OSPF_EVENT
)
879 zlog_debug("ospf_vl_new(): Created name: %s", ifname
);
880 if (IS_DEBUG_OSPF_EVENT
)
881 zlog_debug("ospf_vl_new(): set if->name to %s", vi
->name
);
884 area
= ospf_area_get(ospf
, area_id
);
887 if (IS_DEBUG_OSPF_EVENT
)
889 "ospf_vl_new(): set associated area to the backbone");
891 /* Add pseudo neighbor. */
892 ospf_nbr_self_reset(voi
, voi
->ospf
->router_id
);
894 ospf_area_add_if(voi
->area
, voi
);
896 if (IS_DEBUG_OSPF_EVENT
)
897 zlog_debug("ospf_vl_new(): Stop");
901 static void ospf_vl_if_delete(struct ospf_vl_data
*vl_data
)
903 struct interface
*ifp
= vl_data
->vl_oi
->ifp
;
904 vl_data
->vl_oi
->address
->u
.prefix4
.s_addr
= 0;
905 vl_data
->vl_oi
->address
->prefixlen
= 0;
906 ospf_if_free(vl_data
->vl_oi
);
911 /* for a defined area, count the number of configured vl
913 int ospf_vl_count(struct ospf
*ospf
, struct ospf_area
*area
)
916 struct ospf_vl_data
*vl_data
;
917 struct listnode
*node
;
919 for (ALL_LIST_ELEMENTS_RO(ospf
->vlinks
, node
, vl_data
)) {
921 && !IPV4_ADDR_SAME(&vl_data
->vl_area_id
, &area
->area_id
))
928 /* Look up vl_data for given peer, optionally qualified to be in the
929 * specified area. NULL area returns first found..
931 struct ospf_vl_data
*ospf_vl_lookup(struct ospf
*ospf
, struct ospf_area
*area
,
932 struct in_addr vl_peer
)
934 struct ospf_vl_data
*vl_data
;
935 struct listnode
*node
;
937 if (IS_DEBUG_OSPF_EVENT
) {
938 zlog_debug("%s: Looking for %s", __func__
, inet_ntoa(vl_peer
));
940 zlog_debug("%s: in area %s", __func__
,
941 inet_ntoa(area
->area_id
));
944 for (ALL_LIST_ELEMENTS_RO(ospf
->vlinks
, node
, vl_data
)) {
945 if (IS_DEBUG_OSPF_EVENT
)
946 zlog_debug("%s: VL %s, peer %s", __func__
,
947 vl_data
->vl_oi
->ifp
->name
,
948 inet_ntoa(vl_data
->vl_peer
));
951 && !IPV4_ADDR_SAME(&vl_data
->vl_area_id
, &area
->area_id
))
954 if (IPV4_ADDR_SAME(&vl_data
->vl_peer
, &vl_peer
))
961 static void ospf_vl_shutdown(struct ospf_vl_data
*vl_data
)
963 struct ospf_interface
*oi
;
965 if ((oi
= vl_data
->vl_oi
) == NULL
)
968 oi
->address
->u
.prefix4
.s_addr
= 0;
969 oi
->address
->prefixlen
= 0;
971 UNSET_FLAG(oi
->ifp
->flags
, IFF_UP
);
972 /* OSPF_ISM_EVENT_SCHEDULE (oi, ISM_InterfaceDown); */
973 OSPF_ISM_EVENT_EXECUTE(oi
, ISM_InterfaceDown
);
976 void ospf_vl_add(struct ospf
*ospf
, struct ospf_vl_data
*vl_data
)
978 listnode_add(ospf
->vlinks
, vl_data
);
979 hook_call(ospf_vl_add
, vl_data
);
982 void ospf_vl_delete(struct ospf
*ospf
, struct ospf_vl_data
*vl_data
)
984 ospf_vl_shutdown(vl_data
);
985 ospf_vl_if_delete(vl_data
);
987 hook_call(ospf_vl_delete
, vl_data
);
988 listnode_delete(ospf
->vlinks
, vl_data
);
990 ospf_vl_data_free(vl_data
);
993 static int ospf_vl_set_params(struct ospf_vl_data
*vl_data
, struct vertex
*v
)
996 struct ospf_interface
*voi
;
997 struct listnode
*node
;
998 struct vertex_parent
*vp
= NULL
;
1000 struct router_lsa
*rl
;
1002 voi
= vl_data
->vl_oi
;
1004 if (voi
->output_cost
!= v
->distance
) {
1006 voi
->output_cost
= v
->distance
;
1010 for (ALL_LIST_ELEMENTS_RO(v
->parents
, node
, vp
)) {
1011 vl_data
->nexthop
.oi
= vp
->nexthop
->oi
;
1012 vl_data
->nexthop
.router
= vp
->nexthop
->router
;
1014 if (!IPV4_ADDR_SAME(&voi
->address
->u
.prefix4
,
1015 &vl_data
->nexthop
.oi
->address
->u
.prefix4
))
1018 voi
->address
->u
.prefix4
=
1019 vl_data
->nexthop
.oi
->address
->u
.prefix4
;
1020 voi
->address
->prefixlen
=
1021 vl_data
->nexthop
.oi
->address
->prefixlen
;
1023 break; /* We take the first interface. */
1026 rl
= (struct router_lsa
*)v
->lsa
;
1028 /* use SPF determined backlink index in struct vertex
1029 * for virtual link destination address
1031 if (vp
&& vp
->backlink
>= 0) {
1032 if (!IPV4_ADDR_SAME(&vl_data
->peer_addr
,
1033 &rl
->link
[vp
->backlink
].link_data
))
1035 vl_data
->peer_addr
= rl
->link
[vp
->backlink
].link_data
;
1037 /* This is highly odd, there is no backlink index
1038 * there should be due to the ospf_spf_has_link() check
1039 * in SPF. Lets warn and try pick a link anyway.
1041 zlog_info("ospf_vl_set_params: No backlink for %s!",
1042 vl_data
->vl_oi
->ifp
->name
);
1043 for (i
= 0; i
< ntohs(rl
->links
); i
++) {
1044 switch (rl
->link
[i
].type
) {
1045 case LSA_LINK_TYPE_VIRTUALLINK
:
1046 if (IS_DEBUG_OSPF_EVENT
)
1048 "found back link through VL");
1050 case LSA_LINK_TYPE_TRANSIT
:
1051 case LSA_LINK_TYPE_POINTOPOINT
:
1052 if (!IPV4_ADDR_SAME(&vl_data
->peer_addr
,
1053 &rl
->link
[i
].link_data
))
1055 vl_data
->peer_addr
= rl
->link
[i
].link_data
;
1060 if (IS_DEBUG_OSPF_EVENT
)
1061 zlog_debug("%s: %s peer address: %s, cost: %d,%schanged",
1062 __func__
, vl_data
->vl_oi
->ifp
->name
,
1063 inet_ntoa(vl_data
->peer_addr
), voi
->output_cost
,
1064 (changed
? " " : " un"));
1070 void ospf_vl_up_check(struct ospf_area
*area
, struct in_addr rid
,
1073 struct ospf
*ospf
= area
->ospf
;
1074 struct listnode
*node
;
1075 struct ospf_vl_data
*vl_data
;
1076 struct ospf_interface
*oi
;
1078 if (IS_DEBUG_OSPF_EVENT
) {
1079 zlog_debug("ospf_vl_up_check(): Start");
1080 zlog_debug("ospf_vl_up_check(): Router ID is %s",
1082 zlog_debug("ospf_vl_up_check(): Area is %s",
1083 inet_ntoa(area
->area_id
));
1086 for (ALL_LIST_ELEMENTS_RO(ospf
->vlinks
, node
, vl_data
)) {
1087 if (IS_DEBUG_OSPF_EVENT
) {
1088 zlog_debug("%s: considering VL, %s in area %s",
1089 __func__
, vl_data
->vl_oi
->ifp
->name
,
1090 inet_ntoa(vl_data
->vl_area_id
));
1091 zlog_debug("%s: peer ID: %s", __func__
,
1092 inet_ntoa(vl_data
->vl_peer
));
1095 if (IPV4_ADDR_SAME(&vl_data
->vl_peer
, &rid
)
1096 && IPV4_ADDR_SAME(&vl_data
->vl_area_id
, &area
->area_id
)) {
1097 oi
= vl_data
->vl_oi
;
1098 SET_FLAG(vl_data
->flags
, OSPF_VL_FLAG_APPROVED
);
1100 if (IS_DEBUG_OSPF_EVENT
)
1102 "ospf_vl_up_check(): this VL matched");
1104 if (oi
->state
== ISM_Down
) {
1105 if (IS_DEBUG_OSPF_EVENT
)
1107 "ospf_vl_up_check(): VL is down, waking it up");
1108 SET_FLAG(oi
->ifp
->flags
, IFF_UP
);
1109 OSPF_ISM_EVENT_EXECUTE(oi
, ISM_InterfaceUp
);
1112 if (ospf_vl_set_params(vl_data
, v
)) {
1113 if (IS_DEBUG_OSPF(ism
, ISM_EVENTS
))
1115 "ospf_vl_up_check: VL cost change,"
1116 " scheduling router lsa refresh");
1118 ospf_router_lsa_update_area(
1120 else if (IS_DEBUG_OSPF(ism
, ISM_EVENTS
))
1122 "ospf_vl_up_check: VL cost change, no backbone!");
1128 void ospf_vl_unapprove(struct ospf
*ospf
)
1130 struct listnode
*node
;
1131 struct ospf_vl_data
*vl_data
;
1133 for (ALL_LIST_ELEMENTS_RO(ospf
->vlinks
, node
, vl_data
))
1134 UNSET_FLAG(vl_data
->flags
, OSPF_VL_FLAG_APPROVED
);
1137 void ospf_vl_shut_unapproved(struct ospf
*ospf
)
1139 struct listnode
*node
, *nnode
;
1140 struct ospf_vl_data
*vl_data
;
1142 for (ALL_LIST_ELEMENTS(ospf
->vlinks
, node
, nnode
, vl_data
))
1143 if (!CHECK_FLAG(vl_data
->flags
, OSPF_VL_FLAG_APPROVED
))
1144 ospf_vl_shutdown(vl_data
);
1147 int ospf_full_virtual_nbrs(struct ospf_area
*area
)
1149 if (IS_DEBUG_OSPF_EVENT
) {
1151 "counting fully adjacent virtual neighbors in area %s",
1152 inet_ntoa(area
->area_id
));
1153 zlog_debug("there are %d of them", area
->full_vls
);
1156 return area
->full_vls
;
1159 int ospf_vls_in_area(struct ospf_area
*area
)
1161 struct listnode
*node
;
1162 struct ospf_vl_data
*vl_data
;
1165 for (ALL_LIST_ELEMENTS_RO(area
->ospf
->vlinks
, node
, vl_data
))
1166 if (IPV4_ADDR_SAME(&vl_data
->vl_area_id
, &area
->area_id
))
1173 struct crypt_key
*ospf_crypt_key_new(void)
1175 return XCALLOC(MTYPE_OSPF_CRYPT_KEY
, sizeof(struct crypt_key
));
1178 void ospf_crypt_key_add(struct list
*crypt
, struct crypt_key
*ck
)
1180 listnode_add(crypt
, ck
);
1183 struct crypt_key
*ospf_crypt_key_lookup(struct list
*auth_crypt
, uint8_t key_id
)
1185 struct listnode
*node
;
1186 struct crypt_key
*ck
;
1188 for (ALL_LIST_ELEMENTS_RO(auth_crypt
, node
, ck
))
1189 if (ck
->key_id
== key_id
)
1195 int ospf_crypt_key_delete(struct list
*auth_crypt
, uint8_t key_id
)
1197 struct listnode
*node
, *nnode
;
1198 struct crypt_key
*ck
;
1200 for (ALL_LIST_ELEMENTS(auth_crypt
, node
, nnode
, ck
)) {
1201 if (ck
->key_id
== key_id
) {
1202 listnode_delete(auth_crypt
, ck
);
1203 XFREE(MTYPE_OSPF_CRYPT_KEY
, ck
);
1211 uint8_t ospf_default_iftype(struct interface
*ifp
)
1213 if (if_is_pointopoint(ifp
))
1214 return OSPF_IFTYPE_POINTOPOINT
;
1215 else if (if_is_loopback(ifp
) || if_is_vrf(ifp
))
1216 return OSPF_IFTYPE_LOOPBACK
;
1218 return OSPF_IFTYPE_BROADCAST
;
1221 void ospf_if_init(void)
1223 /* Initialize Zebra interface data structure. */
1224 hook_register_prio(if_add
, 0, ospf_if_new_hook
);
1225 hook_register_prio(if_del
, 0, ospf_if_delete_hook
);