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
30 #include "pim_neighbor.h"
33 #include "pim_iface.h"
35 #include "pim_upstream.h"
36 #include "pim_ifchannel.h"
38 #include "pim_zebra.h"
40 #include "pim_jp_agg.h"
43 static void dr_election_by_addr(struct interface
*ifp
)
45 struct pim_interface
*pim_ifp
;
46 struct listnode
*node
;
47 struct pim_neighbor
*neigh
;
52 pim_ifp
->pim_dr_addr
= pim_ifp
->primary_address
;
54 if (PIM_DEBUG_PIM_TRACE
) {
55 zlog_debug("%s: on interface %s", __PRETTY_FUNCTION__
,
59 for (ALL_LIST_ELEMENTS_RO(pim_ifp
->pim_neighbor_list
, node
, neigh
)) {
60 if (ntohl(neigh
->source_addr
.s_addr
)
61 > ntohl(pim_ifp
->pim_dr_addr
.s_addr
)) {
62 pim_ifp
->pim_dr_addr
= neigh
->source_addr
;
67 static void dr_election_by_pri(struct interface
*ifp
)
69 struct pim_interface
*pim_ifp
;
70 struct listnode
*node
;
71 struct pim_neighbor
*neigh
;
77 pim_ifp
->pim_dr_addr
= pim_ifp
->primary_address
;
78 dr_pri
= pim_ifp
->pim_dr_priority
;
80 if (PIM_DEBUG_PIM_TRACE
) {
81 zlog_debug("%s: dr pri %u on interface %s", __PRETTY_FUNCTION__
,
85 for (ALL_LIST_ELEMENTS_RO(pim_ifp
->pim_neighbor_list
, node
, neigh
)) {
86 if (PIM_DEBUG_PIM_TRACE
) {
87 zlog_info("%s: neigh pri %u addr %x if dr addr %x",
88 __PRETTY_FUNCTION__
, neigh
->dr_priority
,
89 ntohl(neigh
->source_addr
.s_addr
),
90 ntohl(pim_ifp
->pim_dr_addr
.s_addr
));
92 if ((neigh
->dr_priority
> dr_pri
)
93 || ((neigh
->dr_priority
== dr_pri
)
94 && (ntohl(neigh
->source_addr
.s_addr
)
95 > ntohl(pim_ifp
->pim_dr_addr
.s_addr
)))) {
96 pim_ifp
->pim_dr_addr
= neigh
->source_addr
;
97 dr_pri
= neigh
->dr_priority
;
103 RFC 4601: 4.3.2. DR Election
105 A router's idea of the current DR on an interface can change when a
106 PIM Hello message is received, when a neighbor times out, or when a
107 router's own DR Priority changes.
109 int pim_if_dr_election(struct interface
*ifp
)
111 struct pim_interface
*pim_ifp
= ifp
->info
;
112 struct in_addr old_dr_addr
;
114 ++pim_ifp
->pim_dr_election_count
;
116 old_dr_addr
= pim_ifp
->pim_dr_addr
;
118 if (pim_ifp
->pim_dr_num_nondrpri_neighbors
) {
119 dr_election_by_addr(ifp
);
121 dr_election_by_pri(ifp
);
125 if (old_dr_addr
.s_addr
!= pim_ifp
->pim_dr_addr
.s_addr
) {
127 if (PIM_DEBUG_PIM_EVENTS
) {
128 char dr_old_str
[INET_ADDRSTRLEN
];
129 char dr_new_str
[INET_ADDRSTRLEN
];
130 pim_inet4_dump("<old_dr?>", old_dr_addr
, dr_old_str
,
132 pim_inet4_dump("<new_dr?>", pim_ifp
->pim_dr_addr
,
133 dr_new_str
, sizeof(dr_new_str
));
134 zlog_debug("%s: DR was %s now is %s on interface %s",
135 __PRETTY_FUNCTION__
, dr_old_str
, dr_new_str
,
139 pim_ifp
->pim_dr_election_last
=
140 pim_time_monotonic_sec(); /* timestamp */
141 ++pim_ifp
->pim_dr_election_changes
;
142 pim_if_update_join_desired(pim_ifp
);
143 pim_if_update_could_assert(ifp
);
144 pim_if_update_assert_tracking_desired(ifp
);
151 static void update_dr_priority(struct pim_neighbor
*neigh
,
152 pim_hello_options hello_options
,
153 uint32_t dr_priority
)
155 pim_hello_options will_set_pri
; /* boolean */
156 pim_hello_options bit_flip
; /* boolean */
157 pim_hello_options pri_change
; /* boolean */
160 PIM_OPTION_IS_SET(hello_options
, PIM_OPTION_MASK_DR_PRIORITY
);
162 bit_flip
= (will_set_pri
163 != PIM_OPTION_IS_SET(neigh
->hello_options
,
164 PIM_OPTION_MASK_DR_PRIORITY
));
167 struct pim_interface
*pim_ifp
= neigh
->interface
->info
;
169 /* update num. of neighbors without dr_pri */
172 --pim_ifp
->pim_dr_num_nondrpri_neighbors
;
174 ++pim_ifp
->pim_dr_num_nondrpri_neighbors
;
178 pri_change
= (bit_flip
|| (neigh
->dr_priority
!= dr_priority
));
181 neigh
->dr_priority
= dr_priority
;
183 neigh
->dr_priority
= 0; /* cosmetic unset */
188 RFC 4601: 4.3.2. DR Election
190 A router's idea of the current DR on an interface can change
192 PIM Hello message is received, when a neighbor times out, or
194 router's own DR Priority changes.
197 neigh
->interface
); // router's own DR Priority changes
201 static int on_neighbor_timer(struct thread
*t
)
203 struct pim_neighbor
*neigh
;
204 struct interface
*ifp
;
207 neigh
= THREAD_ARG(t
);
209 ifp
= neigh
->interface
;
211 if (PIM_DEBUG_PIM_TRACE
) {
212 char src_str
[INET_ADDRSTRLEN
];
213 pim_inet4_dump("<src?>", neigh
->source_addr
, src_str
,
216 "Expired %d sec holdtime for neighbor %s on interface %s",
217 neigh
->holdtime
, src_str
, ifp
->name
);
220 snprintf(msg
, sizeof(msg
), "%d-sec holdtime expired", neigh
->holdtime
);
221 pim_neighbor_delete(ifp
, neigh
, msg
);
224 RFC 4601: 4.3.2. DR Election
226 A router's idea of the current DR on an interface can change when a
227 PIM Hello message is received, when a neighbor times out, or when a
228 router's own DR Priority changes.
230 pim_if_dr_election(ifp
); // neighbor times out
235 void pim_neighbor_timer_reset(struct pim_neighbor
*neigh
, uint16_t holdtime
)
237 neigh
->holdtime
= holdtime
;
239 THREAD_OFF(neigh
->t_expire_timer
);
242 0xFFFF is request for no holdtime
244 if (neigh
->holdtime
== 0xFFFF) {
248 if (PIM_DEBUG_PIM_TRACE_DETAIL
) {
249 char src_str
[INET_ADDRSTRLEN
];
250 pim_inet4_dump("<src?>", neigh
->source_addr
, src_str
,
252 zlog_debug("%s: starting %u sec timer for neighbor %s on %s",
253 __PRETTY_FUNCTION__
, neigh
->holdtime
, src_str
,
254 neigh
->interface
->name
);
257 thread_add_timer(master
, on_neighbor_timer
, neigh
, neigh
->holdtime
,
258 &neigh
->t_expire_timer
);
261 static int on_neighbor_jp_timer(struct thread
*t
)
263 struct pim_neighbor
*neigh
= THREAD_ARG(t
);
266 if (PIM_DEBUG_PIM_TRACE
) {
267 char src_str
[INET_ADDRSTRLEN
];
268 pim_inet4_dump("<src?>", neigh
->source_addr
, src_str
,
270 zlog_debug("%s:Sending JP Agg to %s on %s with %d groups",
271 __PRETTY_FUNCTION__
, src_str
, neigh
->interface
->name
,
272 neigh
->upstream_jp_agg
->count
);
275 rpf
.source_nexthop
.interface
= neigh
->interface
;
276 rpf
.rpf_addr
.u
.prefix4
= neigh
->source_addr
;
277 pim_joinprune_send(&rpf
, neigh
->upstream_jp_agg
);
279 thread_add_timer(master
, on_neighbor_jp_timer
, neigh
, qpim_t_periodic
,
285 static void pim_neighbor_start_jp_timer(struct pim_neighbor
*neigh
)
287 THREAD_TIMER_OFF(neigh
->jp_timer
);
288 thread_add_timer(master
, on_neighbor_jp_timer
, neigh
, qpim_t_periodic
,
292 static struct pim_neighbor
*
293 pim_neighbor_new(struct interface
*ifp
, struct in_addr source_addr
,
294 pim_hello_options hello_options
, uint16_t holdtime
,
295 uint16_t propagation_delay
, uint16_t override_interval
,
296 uint32_t dr_priority
, uint32_t generation_id
,
297 struct list
*addr_list
)
299 struct pim_interface
*pim_ifp
;
300 struct pim_neighbor
*neigh
;
301 char src_str
[INET_ADDRSTRLEN
];
307 neigh
= XCALLOC(MTYPE_PIM_NEIGHBOR
, sizeof(*neigh
));
309 zlog_err("%s: PIM XCALLOC(%zu) failure", __PRETTY_FUNCTION__
,
314 neigh
->creation
= pim_time_monotonic_sec();
315 neigh
->source_addr
= source_addr
;
316 neigh
->hello_options
= hello_options
;
317 neigh
->propagation_delay_msec
= propagation_delay
;
318 neigh
->override_interval_msec
= override_interval
;
319 neigh
->dr_priority
= dr_priority
;
320 neigh
->generation_id
= generation_id
;
321 neigh
->prefix_list
= addr_list
;
322 neigh
->t_expire_timer
= NULL
;
323 neigh
->interface
= ifp
;
325 neigh
->upstream_jp_agg
= list_new();
326 neigh
->upstream_jp_agg
->cmp
= pim_jp_agg_group_list_cmp
;
327 neigh
->upstream_jp_agg
->del
=
328 (void (*)(void *))pim_jp_agg_group_list_free
;
329 pim_neighbor_start_jp_timer(neigh
);
331 pim_neighbor_timer_reset(neigh
, holdtime
);
333 * The pim_ifstat_hello_sent variable is used to decide if
334 * we should expedite a hello out the interface. If we
335 * establish a new neighbor, we unfortunately need to
336 * reset the value so that we can know to hurry up and
339 pim_ifp
->pim_ifstat_hello_sent
= 0;
341 pim_inet4_dump("<src?>", source_addr
, src_str
, sizeof(src_str
));
343 if (PIM_DEBUG_PIM_EVENTS
) {
344 zlog_debug("%s: creating PIM neighbor %s on interface %s",
345 __PRETTY_FUNCTION__
, src_str
, ifp
->name
);
348 zlog_info("PIM NEIGHBOR UP: neighbor %s on interface %s", src_str
,
351 if (neigh
->propagation_delay_msec
352 > pim_ifp
->pim_neighbors_highest_propagation_delay_msec
) {
353 pim_ifp
->pim_neighbors_highest_propagation_delay_msec
=
354 neigh
->propagation_delay_msec
;
356 if (neigh
->override_interval_msec
357 > pim_ifp
->pim_neighbors_highest_override_interval_msec
) {
358 pim_ifp
->pim_neighbors_highest_override_interval_msec
=
359 neigh
->override_interval_msec
;
362 if (!PIM_OPTION_IS_SET(neigh
->hello_options
,
363 PIM_OPTION_MASK_LAN_PRUNE_DELAY
)) {
364 /* update num. of neighbors without hello option lan_delay */
365 ++pim_ifp
->pim_number_of_nonlandelay_neighbors
;
368 if (!PIM_OPTION_IS_SET(neigh
->hello_options
,
369 PIM_OPTION_MASK_DR_PRIORITY
)) {
370 /* update num. of neighbors without hello option dr_pri */
371 ++pim_ifp
->pim_dr_num_nondrpri_neighbors
;
374 // Register PIM Neighbor with BFD
375 pim_bfd_trigger_event(pim_ifp
, neigh
, 1);
380 static void delete_prefix_list(struct pim_neighbor
*neigh
)
382 if (neigh
->prefix_list
) {
384 #ifdef DUMP_PREFIX_LIST
385 struct listnode
*p_node
;
388 int list_size
= neigh
->prefix_list
389 ? (int)listcount(neigh
->prefix_list
)
392 for (ALL_LIST_ELEMENTS_RO(neigh
->prefix_list
, p_node
, p
)) {
393 pim_inet4_dump("<addr?>", p
->u
.prefix4
, addr_str
,
396 "%s: DUMP_PREFIX_LIST neigh=%x prefix_list=%x prefix=%x addr=%s [%d/%d]",
397 __PRETTY_FUNCTION__
, (unsigned)neigh
,
398 (unsigned)neigh
->prefix_list
, (unsigned)p
,
399 addr_str
, i
, list_size
);
404 list_delete_and_null(&neigh
->prefix_list
);
408 void pim_neighbor_free(struct pim_neighbor
*neigh
)
410 zassert(!neigh
->t_expire_timer
);
412 delete_prefix_list(neigh
);
414 list_delete_and_null(&neigh
->upstream_jp_agg
);
415 THREAD_OFF(neigh
->jp_timer
);
417 XFREE(MTYPE_PIM_NEIGHBOR
, neigh
);
420 struct pim_neighbor
*pim_neighbor_find_by_secondary(struct interface
*ifp
,
423 struct pim_interface
*pim_ifp
;
424 struct listnode
*node
, *pnode
;
425 struct pim_neighbor
*neigh
;
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
);
546 pim_rp_setup(pim_ifp
->pim
);
548 sched_rpf_cache_refresh();
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();
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
) {
805 "%s: internal error: trying to replace same prefix list=%p",
806 __PRETTY_FUNCTION__
, (void *)addr_list
);
809 /* Delete existing secondary address list */
810 delete_prefix_list(neigh
);
814 delete_from_neigh_addr(neigh
->interface
, addr_list
,
818 /* Replace secondary address list */
819 neigh
->prefix_list
= addr_list
;
821 update_dr_priority(neigh
, hello_options
, dr_priority
);
825 neigh
->hello_options
= hello_options
;