3 * Copyright (C) 2008 Everton da Silva Marques
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 * You should have received a copy of the GNU General Public License along
16 * with this program; see the file COPYING; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
28 #include "lib_errors.h"
31 #include "pim_neighbor.h"
34 #include "pim_iface.h"
36 #include "pim_upstream.h"
37 #include "pim_ifchannel.h"
39 #include "pim_zebra.h"
41 #include "pim_jp_agg.h"
44 static void dr_election_by_addr(struct interface
*ifp
)
46 struct pim_interface
*pim_ifp
;
47 struct listnode
*node
;
48 struct pim_neighbor
*neigh
;
53 pim_ifp
->pim_dr_addr
= pim_ifp
->primary_address
;
55 if (PIM_DEBUG_PIM_TRACE
) {
56 zlog_debug("%s: on interface %s", __PRETTY_FUNCTION__
,
60 for (ALL_LIST_ELEMENTS_RO(pim_ifp
->pim_neighbor_list
, node
, neigh
)) {
61 if (ntohl(neigh
->source_addr
.s_addr
)
62 > ntohl(pim_ifp
->pim_dr_addr
.s_addr
)) {
63 pim_ifp
->pim_dr_addr
= neigh
->source_addr
;
68 static void dr_election_by_pri(struct interface
*ifp
)
70 struct pim_interface
*pim_ifp
;
71 struct listnode
*node
;
72 struct pim_neighbor
*neigh
;
78 pim_ifp
->pim_dr_addr
= pim_ifp
->primary_address
;
79 dr_pri
= pim_ifp
->pim_dr_priority
;
81 if (PIM_DEBUG_PIM_TRACE
) {
82 zlog_debug("%s: dr pri %u on interface %s", __PRETTY_FUNCTION__
,
86 for (ALL_LIST_ELEMENTS_RO(pim_ifp
->pim_neighbor_list
, node
, neigh
)) {
87 if (PIM_DEBUG_PIM_TRACE
) {
88 zlog_info("%s: neigh pri %u addr %x if dr addr %x",
89 __PRETTY_FUNCTION__
, neigh
->dr_priority
,
90 ntohl(neigh
->source_addr
.s_addr
),
91 ntohl(pim_ifp
->pim_dr_addr
.s_addr
));
93 if ((neigh
->dr_priority
> dr_pri
)
94 || ((neigh
->dr_priority
== dr_pri
)
95 && (ntohl(neigh
->source_addr
.s_addr
)
96 > ntohl(pim_ifp
->pim_dr_addr
.s_addr
)))) {
97 pim_ifp
->pim_dr_addr
= neigh
->source_addr
;
98 dr_pri
= neigh
->dr_priority
;
104 RFC 4601: 4.3.2. DR Election
106 A router's idea of the current DR on an interface can change when a
107 PIM Hello message is received, when a neighbor times out, or when a
108 router's own DR Priority changes.
110 int pim_if_dr_election(struct interface
*ifp
)
112 struct pim_interface
*pim_ifp
= ifp
->info
;
113 struct in_addr old_dr_addr
;
115 ++pim_ifp
->pim_dr_election_count
;
117 old_dr_addr
= pim_ifp
->pim_dr_addr
;
119 if (pim_ifp
->pim_dr_num_nondrpri_neighbors
) {
120 dr_election_by_addr(ifp
);
122 dr_election_by_pri(ifp
);
126 if (old_dr_addr
.s_addr
!= pim_ifp
->pim_dr_addr
.s_addr
) {
128 if (PIM_DEBUG_PIM_EVENTS
) {
129 char dr_old_str
[INET_ADDRSTRLEN
];
130 char dr_new_str
[INET_ADDRSTRLEN
];
131 pim_inet4_dump("<old_dr?>", old_dr_addr
, dr_old_str
,
133 pim_inet4_dump("<new_dr?>", pim_ifp
->pim_dr_addr
,
134 dr_new_str
, sizeof(dr_new_str
));
135 zlog_debug("%s: DR was %s now is %s on interface %s",
136 __PRETTY_FUNCTION__
, dr_old_str
, dr_new_str
,
140 pim_ifp
->pim_dr_election_last
=
141 pim_time_monotonic_sec(); /* timestamp */
142 ++pim_ifp
->pim_dr_election_changes
;
143 pim_if_update_join_desired(pim_ifp
);
144 pim_if_update_could_assert(ifp
);
145 pim_if_update_assert_tracking_desired(ifp
);
152 static void update_dr_priority(struct pim_neighbor
*neigh
,
153 pim_hello_options hello_options
,
154 uint32_t dr_priority
)
156 pim_hello_options will_set_pri
; /* boolean */
157 pim_hello_options bit_flip
; /* boolean */
158 pim_hello_options pri_change
; /* boolean */
161 PIM_OPTION_IS_SET(hello_options
, PIM_OPTION_MASK_DR_PRIORITY
);
163 bit_flip
= (will_set_pri
164 != PIM_OPTION_IS_SET(neigh
->hello_options
,
165 PIM_OPTION_MASK_DR_PRIORITY
));
168 struct pim_interface
*pim_ifp
= neigh
->interface
->info
;
170 /* update num. of neighbors without dr_pri */
173 --pim_ifp
->pim_dr_num_nondrpri_neighbors
;
175 ++pim_ifp
->pim_dr_num_nondrpri_neighbors
;
179 pri_change
= (bit_flip
|| (neigh
->dr_priority
!= dr_priority
));
182 neigh
->dr_priority
= dr_priority
;
184 neigh
->dr_priority
= 0; /* cosmetic unset */
189 RFC 4601: 4.3.2. DR Election
191 A router's idea of the current DR on an interface can change
193 PIM Hello message is received, when a neighbor times out, or
195 router's own DR Priority changes.
198 neigh
->interface
); // router's own DR Priority changes
202 static int on_neighbor_timer(struct thread
*t
)
204 struct pim_neighbor
*neigh
;
205 struct interface
*ifp
;
208 neigh
= THREAD_ARG(t
);
210 ifp
= neigh
->interface
;
212 if (PIM_DEBUG_PIM_TRACE
) {
213 char src_str
[INET_ADDRSTRLEN
];
214 pim_inet4_dump("<src?>", neigh
->source_addr
, src_str
,
217 "Expired %d sec holdtime for neighbor %s on interface %s",
218 neigh
->holdtime
, src_str
, ifp
->name
);
221 snprintf(msg
, sizeof(msg
), "%d-sec holdtime expired", neigh
->holdtime
);
222 pim_neighbor_delete(ifp
, neigh
, msg
);
225 RFC 4601: 4.3.2. DR Election
227 A router's idea of the current DR on an interface can change when a
228 PIM Hello message is received, when a neighbor times out, or when a
229 router's own DR Priority changes.
231 pim_if_dr_election(ifp
); // neighbor times out
236 void pim_neighbor_timer_reset(struct pim_neighbor
*neigh
, uint16_t holdtime
)
238 neigh
->holdtime
= holdtime
;
240 THREAD_OFF(neigh
->t_expire_timer
);
243 0xFFFF is request for no holdtime
245 if (neigh
->holdtime
== 0xFFFF) {
249 if (PIM_DEBUG_PIM_TRACE_DETAIL
) {
250 char src_str
[INET_ADDRSTRLEN
];
251 pim_inet4_dump("<src?>", neigh
->source_addr
, src_str
,
253 zlog_debug("%s: starting %u sec timer for neighbor %s on %s",
254 __PRETTY_FUNCTION__
, neigh
->holdtime
, src_str
,
255 neigh
->interface
->name
);
258 thread_add_timer(router
->master
, on_neighbor_timer
, neigh
,
259 neigh
->holdtime
, &neigh
->t_expire_timer
);
262 static int on_neighbor_jp_timer(struct thread
*t
)
264 struct pim_neighbor
*neigh
= THREAD_ARG(t
);
267 if (PIM_DEBUG_PIM_TRACE
) {
268 char src_str
[INET_ADDRSTRLEN
];
269 pim_inet4_dump("<src?>", neigh
->source_addr
, src_str
,
271 zlog_debug("%s:Sending JP Agg to %s on %s with %d groups",
272 __PRETTY_FUNCTION__
, src_str
, neigh
->interface
->name
,
273 neigh
->upstream_jp_agg
->count
);
276 rpf
.source_nexthop
.interface
= neigh
->interface
;
277 rpf
.rpf_addr
.u
.prefix4
= neigh
->source_addr
;
278 pim_joinprune_send(&rpf
, neigh
->upstream_jp_agg
);
280 thread_add_timer(router
->master
, on_neighbor_jp_timer
, neigh
,
281 router
->t_periodic
, &neigh
->jp_timer
);
286 static void pim_neighbor_start_jp_timer(struct pim_neighbor
*neigh
)
288 THREAD_TIMER_OFF(neigh
->jp_timer
);
289 thread_add_timer(router
->master
, on_neighbor_jp_timer
, neigh
,
290 router
->t_periodic
, &neigh
->jp_timer
);
293 static struct pim_neighbor
*
294 pim_neighbor_new(struct interface
*ifp
, struct in_addr source_addr
,
295 pim_hello_options hello_options
, uint16_t holdtime
,
296 uint16_t propagation_delay
, uint16_t override_interval
,
297 uint32_t dr_priority
, uint32_t generation_id
,
298 struct list
*addr_list
)
300 struct pim_interface
*pim_ifp
;
301 struct pim_neighbor
*neigh
;
302 char src_str
[INET_ADDRSTRLEN
];
308 neigh
= XCALLOC(MTYPE_PIM_NEIGHBOR
, sizeof(*neigh
));
310 neigh
->creation
= pim_time_monotonic_sec();
311 neigh
->source_addr
= source_addr
;
312 neigh
->hello_options
= hello_options
;
313 neigh
->propagation_delay_msec
= propagation_delay
;
314 neigh
->override_interval_msec
= override_interval
;
315 neigh
->dr_priority
= dr_priority
;
316 neigh
->generation_id
= generation_id
;
317 neigh
->prefix_list
= addr_list
;
318 neigh
->t_expire_timer
= NULL
;
319 neigh
->interface
= ifp
;
321 neigh
->upstream_jp_agg
= list_new();
322 neigh
->upstream_jp_agg
->cmp
= pim_jp_agg_group_list_cmp
;
323 neigh
->upstream_jp_agg
->del
=
324 (void (*)(void *))pim_jp_agg_group_list_free
;
325 pim_neighbor_start_jp_timer(neigh
);
327 pim_neighbor_timer_reset(neigh
, holdtime
);
329 * The pim_ifstat_hello_sent variable is used to decide if
330 * we should expedite a hello out the interface. If we
331 * establish a new neighbor, we unfortunately need to
332 * reset the value so that we can know to hurry up and
335 pim_ifp
->pim_ifstat_hello_sent
= 0;
337 pim_inet4_dump("<src?>", source_addr
, src_str
, sizeof(src_str
));
339 if (PIM_DEBUG_PIM_EVENTS
) {
340 zlog_debug("%s: creating PIM neighbor %s on interface %s",
341 __PRETTY_FUNCTION__
, src_str
, ifp
->name
);
344 zlog_info("PIM NEIGHBOR UP: neighbor %s on interface %s", src_str
,
347 if (neigh
->propagation_delay_msec
348 > pim_ifp
->pim_neighbors_highest_propagation_delay_msec
) {
349 pim_ifp
->pim_neighbors_highest_propagation_delay_msec
=
350 neigh
->propagation_delay_msec
;
352 if (neigh
->override_interval_msec
353 > pim_ifp
->pim_neighbors_highest_override_interval_msec
) {
354 pim_ifp
->pim_neighbors_highest_override_interval_msec
=
355 neigh
->override_interval_msec
;
358 if (!PIM_OPTION_IS_SET(neigh
->hello_options
,
359 PIM_OPTION_MASK_LAN_PRUNE_DELAY
)) {
360 /* update num. of neighbors without hello option lan_delay */
361 ++pim_ifp
->pim_number_of_nonlandelay_neighbors
;
364 if (!PIM_OPTION_IS_SET(neigh
->hello_options
,
365 PIM_OPTION_MASK_DR_PRIORITY
)) {
366 /* update num. of neighbors without hello option dr_pri */
367 ++pim_ifp
->pim_dr_num_nondrpri_neighbors
;
370 // Register PIM Neighbor with BFD
371 pim_bfd_trigger_event(pim_ifp
, neigh
, 1);
376 static void delete_prefix_list(struct pim_neighbor
*neigh
)
378 if (neigh
->prefix_list
) {
380 #ifdef DUMP_PREFIX_LIST
381 struct listnode
*p_node
;
384 int list_size
= neigh
->prefix_list
385 ? (int)listcount(neigh
->prefix_list
)
388 for (ALL_LIST_ELEMENTS_RO(neigh
->prefix_list
, p_node
, p
)) {
389 pim_inet4_dump("<addr?>", p
->u
.prefix4
, addr_str
,
392 "%s: DUMP_PREFIX_LIST neigh=%x prefix_list=%x prefix=%x addr=%s [%d/%d]",
393 __PRETTY_FUNCTION__
, (unsigned)neigh
,
394 (unsigned)neigh
->prefix_list
, (unsigned)p
,
395 addr_str
, i
, list_size
);
400 list_delete(&neigh
->prefix_list
);
404 void pim_neighbor_free(struct pim_neighbor
*neigh
)
406 zassert(!neigh
->t_expire_timer
);
408 delete_prefix_list(neigh
);
410 list_delete(&neigh
->upstream_jp_agg
);
411 THREAD_OFF(neigh
->jp_timer
);
414 pim_bfd_info_free(&neigh
->bfd_info
);
416 XFREE(MTYPE_PIM_NEIGHBOR
, neigh
);
419 struct pim_neighbor
*pim_neighbor_find_by_secondary(struct interface
*ifp
,
422 struct pim_interface
*pim_ifp
;
423 struct listnode
*node
, *pnode
;
424 struct pim_neighbor
*neigh
;
427 if (!ifp
|| !ifp
->info
)
432 for (ALL_LIST_ELEMENTS_RO(pim_ifp
->pim_neighbor_list
, node
, neigh
)) {
433 for (ALL_LIST_ELEMENTS_RO(neigh
->prefix_list
, pnode
, p
)) {
434 if (prefix_same(p
, src
))
442 struct pim_neighbor
*pim_neighbor_find(struct interface
*ifp
,
443 struct in_addr source_addr
)
445 struct pim_interface
*pim_ifp
;
446 struct listnode
*node
;
447 struct pim_neighbor
*neigh
;
456 for (ALL_LIST_ELEMENTS_RO(pim_ifp
->pim_neighbor_list
, node
, neigh
)) {
457 if (source_addr
.s_addr
== neigh
->source_addr
.s_addr
) {
466 * Find the *one* interface out
467 * this interface. If more than
470 struct pim_neighbor
*pim_neighbor_find_if(struct interface
*ifp
)
472 struct pim_interface
*pim_ifp
= ifp
->info
;
474 if (!pim_ifp
|| pim_ifp
->pim_neighbor_list
->count
!= 1)
477 return listnode_head(pim_ifp
->pim_neighbor_list
);
480 struct pim_neighbor
*
481 pim_neighbor_add(struct interface
*ifp
, struct in_addr source_addr
,
482 pim_hello_options hello_options
, uint16_t holdtime
,
483 uint16_t propagation_delay
, uint16_t override_interval
,
484 uint32_t dr_priority
, uint32_t generation_id
,
485 struct list
*addr_list
, int send_hello_now
)
487 struct pim_interface
*pim_ifp
;
488 struct pim_neighbor
*neigh
;
490 neigh
= pim_neighbor_new(ifp
, source_addr
, hello_options
, holdtime
,
491 propagation_delay
, override_interval
,
492 dr_priority
, generation_id
, addr_list
);
500 listnode_add(pim_ifp
->pim_neighbor_list
, neigh
);
502 if (PIM_DEBUG_PIM_TRACE_DETAIL
) {
503 char str
[INET_ADDRSTRLEN
];
504 pim_inet4_dump("<nht_nbr?>", source_addr
, str
, sizeof(str
));
505 zlog_debug("%s: neighbor %s added ", __PRETTY_FUNCTION__
, str
);
508 RFC 4601: 4.3.2. DR Election
510 A router's idea of the current DR on an interface can change when a
511 PIM Hello message is received, when a neighbor times out, or when a
512 router's own DR Priority changes.
514 pim_if_dr_election(neigh
->interface
); // new neighbor -- should not
515 // trigger dr election...
518 RFC 4601: 4.3.1. Sending Hello Messages
520 To allow new or rebooting routers to learn of PIM neighbors quickly,
521 when a Hello message is received from a new neighbor, or a Hello
522 message with a new GenID is received from an existing neighbor, a
523 new Hello message should be sent on this interface after a
524 randomized delay between 0 and Triggered_Hello_Delay.
526 This is a bit silly to do it that way. If I get a new
527 genid we need to send the hello *now* because we've
528 lined up a bunch of join/prune messages to go out the
532 pim_hello_restart_now(ifp
);
534 pim_hello_restart_triggered(neigh
->interface
);
536 pim_upstream_find_new_rpf(pim_ifp
->pim
);
538 /* RNH can send nexthop update prior to PIM neibhor UP
539 in that case nexthop cache would not consider this neighbor
541 Upon PIM neighbor UP, iterate all RPs and update
542 nexthop cache with this neighbor.
544 pim_resolve_rp_nh(pim_ifp
->pim
, neigh
);
546 pim_rp_setup(pim_ifp
->pim
);
548 sched_rpf_cache_refresh(pim_ifp
->pim
);
552 static uint16_t find_neighbors_next_highest_propagation_delay_msec(
553 struct interface
*ifp
, struct pim_neighbor
*highest_neigh
)
555 struct pim_interface
*pim_ifp
;
556 struct listnode
*neigh_node
;
557 struct pim_neighbor
*neigh
;
558 uint16_t next_highest_delay_msec
;
563 next_highest_delay_msec
= pim_ifp
->pim_propagation_delay_msec
;
565 for (ALL_LIST_ELEMENTS_RO(pim_ifp
->pim_neighbor_list
, neigh_node
,
567 if (neigh
== highest_neigh
)
569 if (neigh
->propagation_delay_msec
> next_highest_delay_msec
)
570 next_highest_delay_msec
= neigh
->propagation_delay_msec
;
573 return next_highest_delay_msec
;
576 static uint16_t find_neighbors_next_highest_override_interval_msec(
577 struct interface
*ifp
, struct pim_neighbor
*highest_neigh
)
579 struct pim_interface
*pim_ifp
;
580 struct listnode
*neigh_node
;
581 struct pim_neighbor
*neigh
;
582 uint16_t next_highest_interval_msec
;
587 next_highest_interval_msec
= pim_ifp
->pim_override_interval_msec
;
589 for (ALL_LIST_ELEMENTS_RO(pim_ifp
->pim_neighbor_list
, neigh_node
,
591 if (neigh
== highest_neigh
)
593 if (neigh
->override_interval_msec
> next_highest_interval_msec
)
594 next_highest_interval_msec
=
595 neigh
->override_interval_msec
;
598 return next_highest_interval_msec
;
601 void pim_neighbor_delete(struct interface
*ifp
, struct pim_neighbor
*neigh
,
602 const char *delete_message
)
604 struct pim_interface
*pim_ifp
;
605 char src_str
[INET_ADDRSTRLEN
];
610 pim_inet4_dump("<src?>", neigh
->source_addr
, src_str
, sizeof(src_str
));
611 zlog_info("PIM NEIGHBOR DOWN: neighbor %s on interface %s: %s", src_str
,
612 ifp
->name
, delete_message
);
614 THREAD_OFF(neigh
->t_expire_timer
);
616 pim_if_assert_on_neighbor_down(ifp
, neigh
->source_addr
);
618 if (!PIM_OPTION_IS_SET(neigh
->hello_options
,
619 PIM_OPTION_MASK_LAN_PRUNE_DELAY
)) {
620 /* update num. of neighbors without hello option lan_delay */
622 --pim_ifp
->pim_number_of_nonlandelay_neighbors
;
625 if (!PIM_OPTION_IS_SET(neigh
->hello_options
,
626 PIM_OPTION_MASK_DR_PRIORITY
)) {
627 /* update num. of neighbors without dr_pri */
629 --pim_ifp
->pim_dr_num_nondrpri_neighbors
;
632 zassert(neigh
->propagation_delay_msec
633 <= pim_ifp
->pim_neighbors_highest_propagation_delay_msec
);
634 zassert(neigh
->override_interval_msec
635 <= pim_ifp
->pim_neighbors_highest_override_interval_msec
);
637 if (pim_if_lan_delay_enabled(ifp
)) {
639 /* will delete a neighbor with highest propagation delay? */
640 if (neigh
->propagation_delay_msec
641 == pim_ifp
->pim_neighbors_highest_propagation_delay_msec
) {
642 /* then find the next highest propagation delay */
643 pim_ifp
->pim_neighbors_highest_propagation_delay_msec
=
644 find_neighbors_next_highest_propagation_delay_msec(
648 /* will delete a neighbor with highest override interval? */
649 if (neigh
->override_interval_msec
650 == pim_ifp
->pim_neighbors_highest_override_interval_msec
) {
651 /* then find the next highest propagation delay */
652 pim_ifp
->pim_neighbors_highest_override_interval_msec
=
653 find_neighbors_next_highest_override_interval_msec(
658 if (PIM_DEBUG_PIM_TRACE
) {
659 zlog_debug("%s: deleting PIM neighbor %s on interface %s",
660 __PRETTY_FUNCTION__
, src_str
, ifp
->name
);
663 // De-Register PIM Neighbor with BFD
664 pim_bfd_trigger_event(pim_ifp
, neigh
, 0);
666 listnode_delete(pim_ifp
->pim_neighbor_list
, neigh
);
668 pim_neighbor_free(neigh
);
670 sched_rpf_cache_refresh(pim_ifp
->pim
);
673 void pim_neighbor_delete_all(struct interface
*ifp
, const char *delete_message
)
675 struct pim_interface
*pim_ifp
;
676 struct listnode
*neigh_node
;
677 struct listnode
*neigh_nextnode
;
678 struct pim_neighbor
*neigh
;
683 for (ALL_LIST_ELEMENTS(pim_ifp
->pim_neighbor_list
, neigh_node
,
684 neigh_nextnode
, neigh
)) {
685 pim_neighbor_delete(ifp
, neigh
, delete_message
);
689 struct prefix
*pim_neighbor_find_secondary(struct pim_neighbor
*neigh
,
692 struct listnode
*node
;
695 if (!neigh
->prefix_list
)
698 for (ALL_LIST_ELEMENTS_RO(neigh
->prefix_list
, node
, p
)) {
699 if (prefix_same(p
, addr
))
707 RFC 4601: 4.3.4. Maintaining Secondary Address Lists
709 All the advertised secondary addresses in received Hello messages
710 must be checked against those previously advertised by all other
711 PIM neighbors on that interface. If there is a conflict and the
712 same secondary address was previously advertised by another
713 neighbor, then only the most recently received mapping MUST be
714 maintained, and an error message SHOULD be logged to the
715 administrator in a rate-limited manner.
717 static void delete_from_neigh_addr(struct interface
*ifp
,
718 struct list
*addr_list
,
719 struct in_addr neigh_addr
)
721 struct listnode
*addr_node
;
723 struct pim_interface
*pim_ifp
;
731 Scan secondary address list
733 for (ALL_LIST_ELEMENTS_RO(addr_list
, addr_node
, addr
)) {
734 struct listnode
*neigh_node
;
735 struct pim_neighbor
*neigh
;
737 if (addr
->family
!= AF_INET
)
743 for (ALL_LIST_ELEMENTS_RO(pim_ifp
->pim_neighbor_list
,
744 neigh_node
, neigh
)) {
746 struct prefix
*p
= pim_neighbor_find_secondary(
749 char addr_str
[INET_ADDRSTRLEN
];
750 char this_neigh_str
[INET_ADDRSTRLEN
];
751 char other_neigh_str
[INET_ADDRSTRLEN
];
754 "<addr?>", addr
->u
.prefix4
,
755 addr_str
, sizeof(addr_str
));
756 pim_inet4_dump("<neigh1?>", neigh_addr
,
758 sizeof(this_neigh_str
));
759 pim_inet4_dump("<neigh2?>",
762 sizeof(other_neigh_str
));
765 "secondary addr %s recvd from neigh %s deleted from neigh %s on %s",
766 addr_str
, this_neigh_str
,
767 other_neigh_str
, ifp
->name
);
769 listnode_delete(neigh
->prefix_list
, p
);
774 } /* scan neighbors */
776 } /* scan addr list */
779 void pim_neighbor_update(struct pim_neighbor
*neigh
,
780 pim_hello_options hello_options
, uint16_t holdtime
,
781 uint32_t dr_priority
, struct list
*addr_list
)
783 struct pim_interface
*pim_ifp
= neigh
->interface
->info
;
785 /* Received holdtime ? */
786 if (PIM_OPTION_IS_SET(hello_options
, PIM_OPTION_MASK_HOLDTIME
)) {
787 pim_neighbor_timer_reset(neigh
, holdtime
);
789 pim_neighbor_timer_reset(neigh
,
790 PIM_IF_DEFAULT_HOLDTIME(pim_ifp
));
793 #ifdef DUMP_PREFIX_LIST
795 "%s: DUMP_PREFIX_LIST old_prefix_list=%x old_size=%d new_prefix_list=%x new_size=%d",
796 __PRETTY_FUNCTION__
, (unsigned)neigh
->prefix_list
,
797 neigh
->prefix_list
? (int)listcount(neigh
->prefix_list
) : -1,
799 addr_list
? (int)listcount(addr_list
) : -1);
802 if (neigh
->prefix_list
== addr_list
) {
806 "%s: internal error: trying to replace same prefix list=%p",
807 __PRETTY_FUNCTION__
, (void *)addr_list
);
810 /* Delete existing secondary address list */
811 delete_prefix_list(neigh
);
815 delete_from_neigh_addr(neigh
->interface
, addr_list
,
819 /* Replace secondary address list */
820 neigh
->prefix_list
= addr_list
;
822 update_dr_priority(neigh
, hello_options
, dr_priority
);
826 neigh
->hello_options
= hello_options
;