1 // SPDX-License-Identifier: GPL-2.0-or-later
4 * Copyright (C) 2016 Cumulus Networks, Inc.
10 #include <lib/jhash.h>
12 #include <lib/prefix.h>
13 #include <lib/sockunion.h>
14 #include <lib/stream.h>
17 #include <lib/plist.h>
18 #include <lib/lib_errors.h>
21 #include "pim_memory.h"
22 #include "pim_instance.h"
23 #include "pim_iface.h"
27 #include "pim_upstream.h"
31 #include "pim_msdp_packet.h"
32 #include "pim_msdp_socket.h"
34 // struct pim_msdp pim_msdp, *msdp = &pim_msdp;
36 static void pim_msdp_peer_listen(struct pim_msdp_peer
*mp
);
37 static void pim_msdp_peer_cr_timer_setup(struct pim_msdp_peer
*mp
, bool start
);
38 static void pim_msdp_peer_ka_timer_setup(struct pim_msdp_peer
*mp
, bool start
);
39 static void pim_msdp_peer_hold_timer_setup(struct pim_msdp_peer
*mp
,
41 static void pim_msdp_peer_free(struct pim_msdp_peer
*mp
);
42 static void pim_msdp_enable(struct pim_instance
*pim
);
43 static void pim_msdp_sa_adv_timer_setup(struct pim_instance
*pim
, bool start
);
44 static void pim_msdp_sa_deref(struct pim_msdp_sa
*sa
,
45 enum pim_msdp_sa_flags flags
);
46 static int pim_msdp_mg_mbr_comp(const void *p1
, const void *p2
);
47 static void pim_msdp_mg_mbr_free(struct pim_msdp_mg_mbr
*mbr
);
49 /************************ SA cache management ******************************/
50 static void pim_msdp_sa_timer_expiry_log(struct pim_msdp_sa
*sa
,
51 const char *timer_str
)
53 zlog_debug("MSDP SA %s %s timer expired", sa
->sg_str
, timer_str
);
56 /* RFC-3618:Sec-5.1 - global active source advertisement timer */
57 static void pim_msdp_sa_adv_timer_cb(struct event
*t
)
59 struct pim_instance
*pim
= EVENT_ARG(t
);
61 if (PIM_DEBUG_MSDP_EVENTS
) {
62 zlog_debug("MSDP SA advertisement timer expired");
65 pim_msdp_sa_adv_timer_setup(pim
, true /* start */);
66 pim_msdp_pkt_sa_tx(pim
);
69 static void pim_msdp_sa_adv_timer_setup(struct pim_instance
*pim
, bool start
)
71 EVENT_OFF(pim
->msdp
.sa_adv_timer
);
73 event_add_timer(pim
->msdp
.master
, pim_msdp_sa_adv_timer_cb
, pim
,
74 PIM_MSDP_SA_ADVERTISMENT_TIME
,
75 &pim
->msdp
.sa_adv_timer
);
79 /* RFC-3618:Sec-5.3 - SA cache state timer */
80 static void pim_msdp_sa_state_timer_cb(struct event
*t
)
82 struct pim_msdp_sa
*sa
;
86 if (PIM_DEBUG_MSDP_EVENTS
) {
87 pim_msdp_sa_timer_expiry_log(sa
, "state");
90 pim_msdp_sa_deref(sa
, PIM_MSDP_SAF_PEER
);
93 static void pim_msdp_sa_state_timer_setup(struct pim_msdp_sa
*sa
, bool start
)
95 EVENT_OFF(sa
->sa_state_timer
);
97 event_add_timer(sa
->pim
->msdp
.master
,
98 pim_msdp_sa_state_timer_cb
, sa
,
99 PIM_MSDP_SA_HOLD_TIME
, &sa
->sa_state_timer
);
103 static void pim_msdp_sa_upstream_del(struct pim_msdp_sa
*sa
)
105 struct pim_upstream
*up
= sa
->up
;
111 if (PIM_UPSTREAM_FLAG_TEST_SRC_MSDP(up
->flags
)) {
112 PIM_UPSTREAM_FLAG_UNSET_SRC_MSDP(up
->flags
);
113 sa
->flags
|= PIM_MSDP_SAF_UP_DEL_IN_PROG
;
114 up
= pim_upstream_del(sa
->pim
, up
, __func__
);
115 /* re-eval joinDesired; clearing peer-msdp-sa flag can
119 pim_upstream_update_join_desired(sa
->pim
, up
);
120 sa
->flags
&= ~PIM_MSDP_SAF_UP_DEL_IN_PROG
;
123 if (PIM_DEBUG_MSDP_EVENTS
) {
124 zlog_debug("MSDP SA %s de-referenced SPT", sa
->sg_str
);
128 static bool pim_msdp_sa_upstream_add_ok(struct pim_msdp_sa
*sa
,
129 struct pim_upstream
*xg_up
)
131 if (!(sa
->flags
& PIM_MSDP_SAF_PEER
)) {
132 /* SA should have been rxed from a peer */
135 /* check if we are RP */
136 if (!I_am_RP(sa
->pim
, sa
->sg
.grp
)) {
140 /* check if we have a (*, G) with a non-empty immediate OIL */
144 memset(&sg
, 0, sizeof(sg
));
147 xg_up
= pim_upstream_find(sa
->pim
, &sg
);
149 if (!xg_up
|| (xg_up
->join_state
!= PIM_UPSTREAM_JOINED
)) {
150 /* join desired will be true for such (*, G) entries so we will
151 * just look at join_state and let the PIM state machine do the
160 /* Upstream add evaluation needs to happen everytime -
161 * 1. Peer reference is added or removed.
162 * 2. The RP for a group changes.
163 * 3. joinDesired for the associated (*, G) changes
164 * 4. associated (*, G) is removed - this seems like a bit redundant
165 * (considering #4); but just in case an entry gets nuked without
166 * upstream state transition
168 static void pim_msdp_sa_upstream_update(struct pim_msdp_sa
*sa
,
169 struct pim_upstream
*xg_up
,
172 struct pim_upstream
*up
;
174 if (!pim_msdp_sa_upstream_add_ok(sa
, xg_up
)) {
175 pim_msdp_sa_upstream_del(sa
);
184 up
= pim_upstream_find(sa
->pim
, &sa
->sg
);
185 if (up
&& (PIM_UPSTREAM_FLAG_TEST_SRC_MSDP(up
->flags
))) {
186 /* somehow we lost track of the upstream ptr? best log it */
188 if (PIM_DEBUG_MSDP_EVENTS
) {
189 zlog_debug("MSDP SA %s SPT reference missing",
195 /* RFC3618: "RP triggers a (S, G) join event towards the data source
196 * as if a JP message was rxed addressed to the RP itself." */
197 up
= pim_upstream_add(sa
->pim
, &sa
->sg
, NULL
/* iif */,
198 PIM_UPSTREAM_FLAG_MASK_SRC_MSDP
, __func__
, NULL
);
202 /* update inherited oil */
203 pim_upstream_inherited_olist(sa
->pim
, up
);
204 /* should we also start the kat in parallel? we will need it
207 if (PIM_DEBUG_MSDP_EVENTS
) {
208 zlog_debug("MSDP SA %s referenced SPT", sa
->sg_str
);
211 if (PIM_DEBUG_MSDP_EVENTS
) {
212 zlog_debug("MSDP SA %s SPT reference failed",
218 /* release all mem associated with a sa */
219 static void pim_msdp_sa_free(struct pim_msdp_sa
*sa
)
221 pim_msdp_sa_state_timer_setup(sa
, false);
223 XFREE(MTYPE_PIM_MSDP_SA
, sa
);
226 static struct pim_msdp_sa
*pim_msdp_sa_new(struct pim_instance
*pim
,
227 pim_sgaddr
*sg
, struct in_addr rp
)
229 struct pim_msdp_sa
*sa
;
231 sa
= XCALLOC(MTYPE_PIM_MSDP_SA
, sizeof(*sa
));
235 snprintfrr(sa
->sg_str
, sizeof(sa
->sg_str
), "%pSG", sg
);
237 sa
->uptime
= pim_time_monotonic_sec();
239 /* insert into misc tables for easy access */
240 sa
= hash_get(pim
->msdp
.sa_hash
, sa
, hash_alloc_intern
);
241 listnode_add_sort(pim
->msdp
.sa_list
, sa
);
243 if (PIM_DEBUG_MSDP_EVENTS
) {
244 zlog_debug("MSDP SA %s created", sa
->sg_str
);
250 static struct pim_msdp_sa
*pim_msdp_sa_find(struct pim_instance
*pim
,
253 struct pim_msdp_sa lookup
;
256 return hash_lookup(pim
->msdp
.sa_hash
, &lookup
);
259 static struct pim_msdp_sa
*pim_msdp_sa_add(struct pim_instance
*pim
,
260 pim_sgaddr
*sg
, struct in_addr rp
)
262 struct pim_msdp_sa
*sa
;
264 sa
= pim_msdp_sa_find(pim
, sg
);
269 return pim_msdp_sa_new(pim
, sg
, rp
);
272 static void pim_msdp_sa_del(struct pim_msdp_sa
*sa
)
274 /* this is somewhat redundant - still want to be careful not to leave
275 * stale upstream references */
276 pim_msdp_sa_upstream_del(sa
);
279 pim_msdp_sa_state_timer_setup(sa
, false /* start */);
281 /* remove the entry from various tables */
282 listnode_delete(sa
->pim
->msdp
.sa_list
, sa
);
283 hash_release(sa
->pim
->msdp
.sa_hash
, sa
);
285 if (PIM_DEBUG_MSDP_EVENTS
) {
286 zlog_debug("MSDP SA %s deleted", sa
->sg_str
);
289 /* free up any associated memory */
290 pim_msdp_sa_free(sa
);
293 static void pim_msdp_sa_peer_ip_set(struct pim_msdp_sa
*sa
,
294 struct pim_msdp_peer
*mp
, struct in_addr rp
)
296 struct pim_msdp_peer
*old_mp
;
298 /* optimize the "no change" case as it will happen
299 * frequently/periodically */
300 if (mp
&& (sa
->peer
.s_addr
== mp
->peer
.s_addr
)) {
304 /* any time the peer ip changes also update the rp address */
305 if (sa
->peer
.s_addr
!= INADDR_ANY
) {
306 old_mp
= pim_msdp_peer_find(sa
->pim
, sa
->peer
);
307 if (old_mp
&& old_mp
->sa_cnt
) {
316 sa
->peer
.s_addr
= PIM_NET_INADDR_ANY
;
321 /* When a local active-source is removed there is no way to withdraw the
322 * source from peers. We will simply remove it from the SA cache so it will
323 * not be sent in supsequent SA updates. Peers will consequently timeout the
325 * Similarly a "peer-added" SA is never explicitly deleted. It is simply
326 * aged out overtime if not seen in the SA updates from the peers.
327 * XXX: should we provide a knob to drop entries learnt from a peer when the
329 static void pim_msdp_sa_deref(struct pim_msdp_sa
*sa
,
330 enum pim_msdp_sa_flags flags
)
332 bool update_up
= false;
334 if ((sa
->flags
& PIM_MSDP_SAF_LOCAL
)) {
335 if (flags
& PIM_MSDP_SAF_LOCAL
) {
336 if (PIM_DEBUG_MSDP_EVENTS
) {
337 zlog_debug("MSDP SA %s local reference removed",
340 if (sa
->pim
->msdp
.local_cnt
)
341 --sa
->pim
->msdp
.local_cnt
;
345 if ((sa
->flags
& PIM_MSDP_SAF_PEER
)) {
346 if (flags
& PIM_MSDP_SAF_PEER
) {
349 if (PIM_DEBUG_MSDP_EVENTS
) {
350 zlog_debug("MSDP SA %s peer reference removed",
353 pim_msdp_sa_state_timer_setup(sa
, false /* start */);
354 rp
.s_addr
= INADDR_ANY
;
355 pim_msdp_sa_peer_ip_set(sa
, NULL
/* mp */, rp
);
356 /* if peer ref was removed we need to remove the msdp
365 pim_msdp_sa_upstream_update(sa
, NULL
/* xg_up */, "sa-deref");
368 if (!(sa
->flags
& PIM_MSDP_SAF_REF
)) {
373 void pim_msdp_sa_ref(struct pim_instance
*pim
, struct pim_msdp_peer
*mp
,
374 pim_sgaddr
*sg
, struct in_addr rp
)
376 struct pim_msdp_sa
*sa
;
378 sa
= pim_msdp_sa_add(pim
, sg
, rp
);
385 if (!(sa
->flags
& PIM_MSDP_SAF_PEER
)) {
386 sa
->flags
|= PIM_MSDP_SAF_PEER
;
387 if (PIM_DEBUG_MSDP_EVENTS
) {
388 zlog_debug("MSDP SA %s added by peer",
392 pim_msdp_sa_peer_ip_set(sa
, mp
, rp
);
393 /* start/re-start the state timer to prevent cache expiry */
394 pim_msdp_sa_state_timer_setup(sa
, true /* start */);
395 /* We re-evaluate SA "SPT-trigger" everytime we hear abt it from
397 * peer. XXX: If this becomes too much of a periodic overhead we
398 * can make it event based */
399 pim_msdp_sa_upstream_update(sa
, NULL
/* xg_up */, "peer-ref");
401 if (!(sa
->flags
& PIM_MSDP_SAF_LOCAL
)) {
402 sa
->flags
|= PIM_MSDP_SAF_LOCAL
;
403 ++sa
->pim
->msdp
.local_cnt
;
404 if (PIM_DEBUG_MSDP_EVENTS
) {
405 zlog_debug("MSDP SA %s added locally",
408 /* send an immediate SA update to peers */
409 sa
->rp
= pim
->msdp
.originator_id
;
410 pim_msdp_pkt_sa_tx_one(sa
);
412 sa
->flags
&= ~PIM_MSDP_SAF_STALE
;
416 /* The following criteria must be met to originate an SA from the MSDP
418 * 1. KAT must be running i.e. source is active.
419 * 2. We must be RP for the group.
420 * 3. Source must be registrable to the RP (this is where the RFC is vague
421 * and especially ambiguous in CLOS networks; with anycast RP all sources
422 * are potentially registrable to all RPs in the domain). We assume #3 is
424 * a. We are also the FHR-DR for the source (OR)
425 * b. We rxed a pim register (null or data encapsulated) within the last
426 * (3 * (1.5 * register_suppression_timer))).
428 static bool pim_msdp_sa_local_add_ok(struct pim_upstream
*up
)
430 struct pim_instance
*pim
= up
->channel_oil
->pim
;
432 if (!(pim
->msdp
.flags
& PIM_MSDPF_ENABLE
)) {
436 if (!pim_upstream_is_kat_running(up
))
437 /* stream is not active */
440 if (!I_am_RP(pim
, up
->sg
.grp
)) {
441 /* we are not RP for the group */
445 /* we are the FHR-DR for this stream or we are RP and have seen
447 * from a FHR for this source */
448 if (PIM_UPSTREAM_FLAG_TEST_FHR(up
->flags
) || up
->t_msdp_reg_timer
) {
455 static void pim_msdp_sa_local_add(struct pim_instance
*pim
, pim_sgaddr
*sg
)
458 rp
.s_addr
= INADDR_ANY
;
459 pim_msdp_sa_ref(pim
, NULL
/* mp */, sg
, rp
);
462 void pim_msdp_sa_local_del(struct pim_instance
*pim
, pim_sgaddr
*sg
)
464 struct pim_msdp_sa
*sa
;
466 sa
= pim_msdp_sa_find(pim
, sg
);
468 pim_msdp_sa_deref(sa
, PIM_MSDP_SAF_LOCAL
);
472 /* we need to be very cautious with this API as SA del too can trigger an
473 * upstream del and we will get stuck in a simple loop */
474 static void pim_msdp_sa_local_del_on_up_del(struct pim_instance
*pim
,
477 struct pim_msdp_sa
*sa
;
479 sa
= pim_msdp_sa_find(pim
, sg
);
481 if (PIM_DEBUG_MSDP_INTERNAL
) {
482 zlog_debug("MSDP local sa %s del on up del",
486 /* if there is no local reference escape */
487 if (!(sa
->flags
& PIM_MSDP_SAF_LOCAL
)) {
488 if (PIM_DEBUG_MSDP_INTERNAL
) {
489 zlog_debug("MSDP local sa %s del; no local ref",
495 if (sa
->flags
& PIM_MSDP_SAF_UP_DEL_IN_PROG
) {
496 /* MSDP is the one that triggered the upstream del. if
498 * we most certainly have a bug in the PIM upstream
500 * will not have a local reference unless the KAT is
501 * running. And if the
502 * KAT is running there MUST be an additional
503 * source-stream reference to
504 * the flow. Accounting for such cases requires lot of
506 * address this in the next release? - XXX */
509 "MSDP sa %s SPT teardown is causing the local entry to be removed",
514 /* we are dropping the sa on upstream del we should not have an
515 * upstream reference */
517 if (PIM_DEBUG_MSDP_INTERNAL
) {
518 zlog_debug("MSDP local sa %s del; up non-NULL",
523 pim_msdp_sa_deref(sa
, PIM_MSDP_SAF_LOCAL
);
527 /* Local SA qualification needs to be re-evaluated when -
528 * 1. KAT is started or stopped
530 * 3. Whenever FHR status changes for a (S,G) - XXX - currently there
531 * is no clear path to transition an entry out of "MASK_FHR" need
532 * to discuss this with Donald. May result in some strangeness if the
533 * FHR is also the RP.
534 * 4. When msdp_reg timer is started or stopped
536 void pim_msdp_sa_local_update(struct pim_upstream
*up
)
538 struct pim_instance
*pim
= up
->channel_oil
->pim
;
540 if (pim_msdp_sa_local_add_ok(up
)) {
541 pim_msdp_sa_local_add(pim
, &up
->sg
);
543 pim_msdp_sa_local_del(pim
, &up
->sg
);
547 static void pim_msdp_sa_local_setup(struct pim_instance
*pim
)
549 struct pim_upstream
*up
;
551 frr_each (rb_pim_upstream
, &pim
->upstream_head
, up
)
552 pim_msdp_sa_local_update(up
);
555 /* whenever the RP changes we need to re-evaluate the "local" SA-cache */
556 /* XXX: needs to be tested */
557 void pim_msdp_i_am_rp_changed(struct pim_instance
*pim
)
559 struct listnode
*sanode
;
560 struct listnode
*nextnode
;
561 struct pim_msdp_sa
*sa
;
563 if (!(pim
->msdp
.flags
& PIM_MSDPF_ENABLE
)) {
564 /* if the feature is not enabled do nothing */
568 if (PIM_DEBUG_MSDP_INTERNAL
) {
569 zlog_debug("MSDP i_am_rp changed");
572 /* mark all local entries as stale */
573 for (ALL_LIST_ELEMENTS_RO(pim
->msdp
.sa_list
, sanode
, sa
)) {
574 if (sa
->flags
& PIM_MSDP_SAF_LOCAL
) {
575 sa
->flags
|= PIM_MSDP_SAF_STALE
;
579 /* re-setup local SA entries */
580 pim_msdp_sa_local_setup(pim
);
582 for (ALL_LIST_ELEMENTS(pim
->msdp
.sa_list
, sanode
, nextnode
, sa
)) {
583 /* purge stale SA entries */
584 if (sa
->flags
& PIM_MSDP_SAF_STALE
) {
585 /* clear the stale flag; the entry may be kept even
588 sa
->flags
&= ~PIM_MSDP_SAF_STALE
;
589 /* sa_deref can end up freeing the sa; so don't access
591 pim_msdp_sa_deref(sa
, PIM_MSDP_SAF_LOCAL
);
593 /* if the souce is still active check if we can
595 pim_msdp_sa_upstream_update(sa
, NULL
/* xg_up */,
601 /* We track the join state of (*, G) entries. If G has sources in the SA-cache
602 * we need to setup or teardown SPT when the JoinDesired status changes for
604 void pim_msdp_up_join_state_changed(struct pim_instance
*pim
,
605 struct pim_upstream
*xg_up
)
607 struct listnode
*sanode
;
608 struct pim_msdp_sa
*sa
;
610 if (PIM_DEBUG_MSDP_INTERNAL
) {
611 zlog_debug("MSDP join state changed for %s", xg_up
->sg_str
);
614 /* If this is not really an XG entry just move on */
615 if (!pim_addr_is_any(xg_up
->sg
.src
) || pim_addr_is_any(xg_up
->sg
.grp
)) {
619 /* XXX: Need to maintain SAs per-group to avoid all this unnecessary
621 for (ALL_LIST_ELEMENTS_RO(pim
->msdp
.sa_list
, sanode
, sa
)) {
622 if (pim_addr_cmp(sa
->sg
.grp
, xg_up
->sg
.grp
)) {
625 pim_msdp_sa_upstream_update(sa
, xg_up
, "up-jp-change");
629 static void pim_msdp_up_xg_del(struct pim_instance
*pim
, pim_sgaddr
*sg
)
631 struct listnode
*sanode
;
632 struct pim_msdp_sa
*sa
;
634 if (PIM_DEBUG_MSDP_INTERNAL
) {
635 zlog_debug("MSDP %pSG del", sg
);
638 /* If this is not really an XG entry just move on */
639 if (!pim_addr_is_any(sg
->src
) || pim_addr_is_any(sg
->grp
)) {
643 /* XXX: Need to maintain SAs per-group to avoid all this unnecessary
645 for (ALL_LIST_ELEMENTS_RO(pim
->msdp
.sa_list
, sanode
, sa
)) {
646 if (pim_addr_cmp(sa
->sg
.grp
, sg
->grp
)) {
649 pim_msdp_sa_upstream_update(sa
, NULL
/* xg */, "up-jp-change");
653 void pim_msdp_up_del(struct pim_instance
*pim
, pim_sgaddr
*sg
)
655 if (PIM_DEBUG_MSDP_INTERNAL
) {
656 zlog_debug("MSDP up %pSG del", sg
);
658 if (pim_addr_is_any(sg
->src
)) {
659 pim_msdp_up_xg_del(pim
, sg
);
661 pim_msdp_sa_local_del_on_up_del(pim
, sg
);
665 /* sa hash and peer list helpers */
666 static unsigned int pim_msdp_sa_hash_key_make(const void *p
)
668 const struct pim_msdp_sa
*sa
= p
;
670 return pim_sgaddr_hash(sa
->sg
, 0);
673 static bool pim_msdp_sa_hash_eq(const void *p1
, const void *p2
)
675 const struct pim_msdp_sa
*sa1
= p1
;
676 const struct pim_msdp_sa
*sa2
= p2
;
678 return !pim_sgaddr_cmp(sa1
->sg
, sa2
->sg
);
681 static int pim_msdp_sa_comp(const void *p1
, const void *p2
)
683 const struct pim_msdp_sa
*sa1
= p1
;
684 const struct pim_msdp_sa
*sa2
= p2
;
686 return pim_sgaddr_cmp(sa1
->sg
, sa2
->sg
);
689 /* RFC-3618:Sec-10.1.3 - Peer-RPF forwarding */
690 /* XXX: this can use a bit of refining and extensions */
691 bool pim_msdp_peer_rpf_check(struct pim_msdp_peer
*mp
, struct in_addr rp
)
693 struct pim_nexthop nexthop
= {0};
695 if (mp
->peer
.s_addr
== rp
.s_addr
) {
699 /* check if the MSDP peer is the nexthop for the RP */
700 if (pim_nexthop_lookup(mp
->pim
, &nexthop
, rp
, 0) &&
701 nexthop
.mrib_nexthop_addr
.s_addr
== mp
->peer
.s_addr
) {
708 /************************ Peer session management **************************/
709 char *pim_msdp_state_dump(enum pim_msdp_peer_state state
, char *buf
,
713 case PIM_MSDP_DISABLED
:
714 snprintf(buf
, buf_size
, "%s", "disabled");
716 case PIM_MSDP_INACTIVE
:
717 snprintf(buf
, buf_size
, "%s", "inactive");
719 case PIM_MSDP_LISTEN
:
720 snprintf(buf
, buf_size
, "%s", "listen");
722 case PIM_MSDP_CONNECTING
:
723 snprintf(buf
, buf_size
, "%s", "connecting");
725 case PIM_MSDP_ESTABLISHED
:
726 snprintf(buf
, buf_size
, "%s", "established");
729 snprintf(buf
, buf_size
, "unk-%d", state
);
734 static void pim_msdp_peer_state_chg_log(struct pim_msdp_peer
*mp
)
736 char state_str
[PIM_MSDP_STATE_STRLEN
];
738 pim_msdp_state_dump(mp
->state
, state_str
, sizeof(state_str
));
739 zlog_debug("MSDP peer %s state chg to %s", mp
->key_str
, state_str
);
742 /* MSDP Connection State Machine actions (defined in RFC-3618:Sec-11.2) */
743 /* 11.2.A2: active peer - start connect retry timer; when the timer fires
744 * a tcp connection will be made */
745 static void pim_msdp_peer_connect(struct pim_msdp_peer
*mp
)
747 mp
->state
= PIM_MSDP_CONNECTING
;
748 if (PIM_DEBUG_MSDP_EVENTS
) {
749 pim_msdp_peer_state_chg_log(mp
);
752 pim_msdp_peer_cr_timer_setup(mp
, true /* start */);
755 /* 11.2.A3: passive peer - just listen for connections */
756 static void pim_msdp_peer_listen(struct pim_msdp_peer
*mp
)
758 mp
->state
= PIM_MSDP_LISTEN
;
759 if (PIM_DEBUG_MSDP_EVENTS
) {
760 pim_msdp_peer_state_chg_log(mp
);
763 /* this is interntionally asymmetric i.e. we set up listen-socket when
765 * first listening peer is configured; but don't bother tearing it down
767 * all the peers go down */
768 pim_msdp_sock_listen(mp
->pim
);
771 /* 11.2.A4 and 11.2.A5: transition active or passive peer to
772 * established state */
773 void pim_msdp_peer_established(struct pim_msdp_peer
*mp
)
775 if (mp
->state
!= PIM_MSDP_ESTABLISHED
) {
779 mp
->state
= PIM_MSDP_ESTABLISHED
;
780 mp
->uptime
= pim_time_monotonic_sec();
782 if (PIM_DEBUG_MSDP_EVENTS
) {
783 pim_msdp_peer_state_chg_log(mp
);
786 /* stop retry timer on active peers */
787 pim_msdp_peer_cr_timer_setup(mp
, false /* start */);
789 /* send KA; start KA and hold timers */
790 pim_msdp_pkt_ka_tx(mp
);
791 pim_msdp_peer_ka_timer_setup(mp
, true /* start */);
792 pim_msdp_peer_hold_timer_setup(mp
, true /* start */);
794 pim_msdp_pkt_sa_tx_to_one_peer(mp
);
796 PIM_MSDP_PEER_WRITE_ON(mp
);
797 PIM_MSDP_PEER_READ_ON(mp
);
800 /* 11.2.A6, 11.2.A7 and 11.2.A8: shutdown the peer tcp connection */
801 void pim_msdp_peer_stop_tcp_conn(struct pim_msdp_peer
*mp
, bool chg_state
)
804 if (mp
->state
== PIM_MSDP_ESTABLISHED
) {
807 mp
->state
= PIM_MSDP_INACTIVE
;
808 if (PIM_DEBUG_MSDP_EVENTS
) {
809 pim_msdp_peer_state_chg_log(mp
);
813 if (PIM_DEBUG_MSDP_INTERNAL
) {
814 zlog_debug("MSDP peer %s pim_msdp_peer_stop_tcp_conn",
817 /* stop read and write threads */
818 PIM_MSDP_PEER_READ_OFF(mp
);
819 PIM_MSDP_PEER_WRITE_OFF(mp
);
824 stream_reset(mp
->ibuf
);
826 stream_fifo_clean(mp
->obuf
);
828 /* stop all peer timers */
829 pim_msdp_peer_ka_timer_setup(mp
, false /* start */);
830 pim_msdp_peer_cr_timer_setup(mp
, false /* start */);
831 pim_msdp_peer_hold_timer_setup(mp
, false /* start */);
833 /* close connection */
840 /* RFC-3618:Sec-5.6 - stop the peer tcp connection and startover */
841 void pim_msdp_peer_reset_tcp_conn(struct pim_msdp_peer
*mp
, const char *rc_str
)
843 if (PIM_DEBUG_EVENTS
) {
844 zlog_debug("MSDP peer %s tcp reset %s", mp
->key_str
, rc_str
);
845 snprintf(mp
->last_reset
, sizeof(mp
->last_reset
), "%s", rc_str
);
848 /* close the connection and transition to listening or connecting */
849 pim_msdp_peer_stop_tcp_conn(mp
, true /* chg_state */);
850 if (PIM_MSDP_PEER_IS_LISTENER(mp
)) {
851 pim_msdp_peer_listen(mp
);
853 pim_msdp_peer_connect(mp
);
857 static void pim_msdp_peer_timer_expiry_log(struct pim_msdp_peer
*mp
,
858 const char *timer_str
)
860 zlog_debug("MSDP peer %s %s timer expired", mp
->key_str
, timer_str
);
863 /* RFC-3618:Sec-5.4 - peer hold timer */
864 static void pim_msdp_peer_hold_timer_cb(struct event
*t
)
866 struct pim_msdp_peer
*mp
;
870 if (PIM_DEBUG_MSDP_EVENTS
) {
871 pim_msdp_peer_timer_expiry_log(mp
, "hold");
874 if (mp
->state
!= PIM_MSDP_ESTABLISHED
) {
878 if (PIM_DEBUG_MSDP_EVENTS
) {
879 pim_msdp_peer_state_chg_log(mp
);
881 pim_msdp_peer_reset_tcp_conn(mp
, "ht-expired");
884 static void pim_msdp_peer_hold_timer_setup(struct pim_msdp_peer
*mp
, bool start
)
886 struct pim_instance
*pim
= mp
->pim
;
887 EVENT_OFF(mp
->hold_timer
);
889 event_add_timer(pim
->msdp
.master
, pim_msdp_peer_hold_timer_cb
,
890 mp
, pim
->msdp
.hold_time
, &mp
->hold_timer
);
895 /* RFC-3618:Sec-5.5 - peer keepalive timer */
896 static void pim_msdp_peer_ka_timer_cb(struct event
*t
)
898 struct pim_msdp_peer
*mp
;
902 if (PIM_DEBUG_MSDP_EVENTS
) {
903 pim_msdp_peer_timer_expiry_log(mp
, "ka");
906 pim_msdp_pkt_ka_tx(mp
);
907 pim_msdp_peer_ka_timer_setup(mp
, true /* start */);
910 static void pim_msdp_peer_ka_timer_setup(struct pim_msdp_peer
*mp
, bool start
)
912 EVENT_OFF(mp
->ka_timer
);
914 event_add_timer(mp
->pim
->msdp
.master
, pim_msdp_peer_ka_timer_cb
,
915 mp
, mp
->pim
->msdp
.keep_alive
, &mp
->ka_timer
);
919 static void pim_msdp_peer_active_connect(struct pim_msdp_peer
*mp
)
923 rc
= pim_msdp_sock_connect(mp
);
925 if (PIM_DEBUG_MSDP_INTERNAL
) {
926 zlog_debug("MSDP peer %s pim_msdp_peer_active_connect: %d",
933 /* connect failed restart the connect-retry timer */
934 pim_msdp_peer_cr_timer_setup(mp
, true /* start */);
937 case connect_success
:
938 /* connect was sucessful move to established */
939 pim_msdp_peer_established(mp
);
942 case connect_in_progress
:
943 /* for NB content we need to wait till sock is readable or
945 PIM_MSDP_PEER_WRITE_ON(mp
);
946 PIM_MSDP_PEER_READ_ON(mp
);
947 /* also restart connect-retry timer to reset the socket if
950 pim_msdp_peer_cr_timer_setup(mp
, true /* start */);
955 /* RFC-3618:Sec-5.6 - connection retry on active peer */
956 static void pim_msdp_peer_cr_timer_cb(struct event
*t
)
958 struct pim_msdp_peer
*mp
;
962 if (PIM_DEBUG_MSDP_EVENTS
) {
963 pim_msdp_peer_timer_expiry_log(mp
, "connect-retry");
966 if (mp
->state
!= PIM_MSDP_CONNECTING
|| PIM_MSDP_PEER_IS_LISTENER(mp
)) {
970 pim_msdp_peer_active_connect(mp
);
973 static void pim_msdp_peer_cr_timer_setup(struct pim_msdp_peer
*mp
, bool start
)
975 EVENT_OFF(mp
->cr_timer
);
977 event_add_timer(mp
->pim
->msdp
.master
, pim_msdp_peer_cr_timer_cb
,
978 mp
, mp
->pim
->msdp
.connection_retry
,
983 /* if a valid packet is rxed from the peer we can restart hold timer */
984 void pim_msdp_peer_pkt_rxed(struct pim_msdp_peer
*mp
)
986 if (mp
->state
== PIM_MSDP_ESTABLISHED
) {
987 pim_msdp_peer_hold_timer_setup(mp
, true /* start */);
991 /* if a valid packet is txed to the peer we can restart ka timer and avoid
992 * unnecessary ka noise in the network */
993 void pim_msdp_peer_pkt_txed(struct pim_msdp_peer
*mp
)
995 if (mp
->state
== PIM_MSDP_ESTABLISHED
) {
996 pim_msdp_peer_ka_timer_setup(mp
, true /* start */);
997 if (PIM_DEBUG_MSDP_INTERNAL
) {
998 zlog_debug("MSDP ka timer restart on pkt tx to %s",
1004 static void pim_msdp_addr2su(union sockunion
*su
, struct in_addr addr
)
1007 su
->sin
.sin_addr
= addr
;
1008 su
->sin
.sin_family
= AF_INET
;
1009 #ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN
1010 su
->sin
.sin_len
= sizeof(struct sockaddr_in
);
1011 #endif /* HAVE_STRUCT_SOCKADDR_IN_SIN_LEN */
1014 /* 11.2.A1: create a new peer and transition state to listen or connecting */
1015 struct pim_msdp_peer
*pim_msdp_peer_add(struct pim_instance
*pim
,
1016 const struct in_addr
*peer
,
1017 const struct in_addr
*local
,
1018 const char *mesh_group_name
)
1020 struct pim_msdp_peer
*mp
;
1022 pim_msdp_enable(pim
);
1024 mp
= XCALLOC(MTYPE_PIM_MSDP_PEER
, sizeof(*mp
));
1028 pim_inet4_dump("<peer?>", mp
->peer
, mp
->key_str
, sizeof(mp
->key_str
));
1029 pim_msdp_addr2su(&mp
->su_peer
, mp
->peer
);
1031 /* XXX: originator_id setting needs to move to the mesh group */
1032 pim
->msdp
.originator_id
= *local
;
1033 pim_msdp_addr2su(&mp
->su_local
, mp
->local
);
1034 if (mesh_group_name
)
1035 mp
->mesh_group_name
=
1036 XSTRDUP(MTYPE_PIM_MSDP_MG_NAME
, mesh_group_name
);
1038 mp
->state
= PIM_MSDP_INACTIVE
;
1040 strlcpy(mp
->last_reset
, "-", sizeof(mp
->last_reset
));
1041 /* higher IP address is listener */
1042 if (ntohl(mp
->local
.s_addr
) > ntohl(mp
->peer
.s_addr
)) {
1043 mp
->flags
|= PIM_MSDP_PEERF_LISTENER
;
1046 /* setup packet buffers */
1047 mp
->ibuf
= stream_new(PIM_MSDP_MAX_PACKET_SIZE
);
1048 mp
->obuf
= stream_fifo_new();
1050 /* insert into misc tables for easy access */
1051 mp
= hash_get(pim
->msdp
.peer_hash
, mp
, hash_alloc_intern
);
1052 listnode_add_sort(pim
->msdp
.peer_list
, mp
);
1054 if (PIM_DEBUG_MSDP_EVENTS
) {
1055 zlog_debug("MSDP peer %s created", mp
->key_str
);
1057 pim_msdp_peer_state_chg_log(mp
);
1060 /* fireup the connect state machine */
1061 if (PIM_MSDP_PEER_IS_LISTENER(mp
)) {
1062 pim_msdp_peer_listen(mp
);
1064 pim_msdp_peer_connect(mp
);
1069 struct pim_msdp_peer
*pim_msdp_peer_find(struct pim_instance
*pim
,
1070 struct in_addr peer_addr
)
1072 struct pim_msdp_peer lookup
;
1074 lookup
.peer
= peer_addr
;
1075 return hash_lookup(pim
->msdp
.peer_hash
, &lookup
);
1078 /* release all mem associated with a peer */
1079 static void pim_msdp_peer_free(struct pim_msdp_peer
*mp
)
1082 * Let's make sure we are not running when we delete
1083 * the underlying data structure
1085 pim_msdp_peer_stop_tcp_conn(mp
, false);
1088 stream_free(mp
->ibuf
);
1092 stream_fifo_free(mp
->obuf
);
1095 XFREE(MTYPE_PIM_MSDP_MG_NAME
, mp
->mesh_group_name
);
1098 XFREE(MTYPE_PIM_MSDP_PEER
, mp
);
1101 /* delete the peer config */
1102 void pim_msdp_peer_del(struct pim_msdp_peer
**mp
)
1107 /* stop the tcp connection and shutdown all timers */
1108 pim_msdp_peer_stop_tcp_conn(*mp
, true /* chg_state */);
1110 /* remove the session from various tables */
1111 listnode_delete((*mp
)->pim
->msdp
.peer_list
, *mp
);
1112 hash_release((*mp
)->pim
->msdp
.peer_hash
, *mp
);
1114 if (PIM_DEBUG_MSDP_EVENTS
) {
1115 zlog_debug("MSDP peer %s deleted", (*mp
)->key_str
);
1118 /* free up any associated memory */
1119 pim_msdp_peer_free(*mp
);
1123 void pim_msdp_peer_change_source(struct pim_msdp_peer
*mp
,
1124 const struct in_addr
*addr
)
1126 pim_msdp_peer_stop_tcp_conn(mp
, true);
1130 if (PIM_MSDP_PEER_IS_LISTENER(mp
))
1131 pim_msdp_peer_listen(mp
);
1133 pim_msdp_peer_connect(mp
);
1136 /* peer hash and peer list helpers */
1137 static unsigned int pim_msdp_peer_hash_key_make(const void *p
)
1139 const struct pim_msdp_peer
*mp
= p
;
1140 return (jhash_1word(mp
->peer
.s_addr
, 0));
1143 static bool pim_msdp_peer_hash_eq(const void *p1
, const void *p2
)
1145 const struct pim_msdp_peer
*mp1
= p1
;
1146 const struct pim_msdp_peer
*mp2
= p2
;
1148 return (mp1
->peer
.s_addr
== mp2
->peer
.s_addr
);
1151 static int pim_msdp_peer_comp(const void *p1
, const void *p2
)
1153 const struct pim_msdp_peer
*mp1
= p1
;
1154 const struct pim_msdp_peer
*mp2
= p2
;
1156 if (ntohl(mp1
->peer
.s_addr
) < ntohl(mp2
->peer
.s_addr
))
1159 if (ntohl(mp1
->peer
.s_addr
) > ntohl(mp2
->peer
.s_addr
))
1165 /************************** Mesh group management **************************/
1166 void pim_msdp_mg_free(struct pim_instance
*pim
, struct pim_msdp_mg
**mgp
)
1168 struct pim_msdp_mg_mbr
*mbr
;
1169 struct listnode
*n
, *nn
;
1174 /* SIP is being removed - tear down all active peer sessions */
1175 for (ALL_LIST_ELEMENTS((*mgp
)->mbr_list
, n
, nn
, mbr
))
1176 pim_msdp_mg_mbr_del((*mgp
), mbr
);
1178 if (PIM_DEBUG_MSDP_EVENTS
) {
1179 zlog_debug("MSDP mesh-group %s deleted",
1180 (*mgp
)->mesh_group_name
);
1183 XFREE(MTYPE_PIM_MSDP_MG_NAME
, (*mgp
)->mesh_group_name
);
1185 if ((*mgp
)->mbr_list
)
1186 list_delete(&(*mgp
)->mbr_list
);
1188 SLIST_REMOVE(&pim
->msdp
.mglist
, (*mgp
), pim_msdp_mg
, mg_entry
);
1189 XFREE(MTYPE_PIM_MSDP_MG
, (*mgp
));
1192 struct pim_msdp_mg
*pim_msdp_mg_new(struct pim_instance
*pim
,
1193 const char *mesh_group_name
)
1195 struct pim_msdp_mg
*mg
;
1197 mg
= XCALLOC(MTYPE_PIM_MSDP_MG
, sizeof(*mg
));
1199 mg
->mesh_group_name
= XSTRDUP(MTYPE_PIM_MSDP_MG_NAME
, mesh_group_name
);
1200 mg
->mbr_list
= list_new();
1201 mg
->mbr_list
->del
= (void (*)(void *))pim_msdp_mg_mbr_free
;
1202 mg
->mbr_list
->cmp
= (int (*)(void *, void *))pim_msdp_mg_mbr_comp
;
1204 if (PIM_DEBUG_MSDP_EVENTS
) {
1205 zlog_debug("MSDP mesh-group %s created", mg
->mesh_group_name
);
1208 SLIST_INSERT_HEAD(&pim
->msdp
.mglist
, mg
, mg_entry
);
1213 static int pim_msdp_mg_mbr_comp(const void *p1
, const void *p2
)
1215 const struct pim_msdp_mg_mbr
*mbr1
= p1
;
1216 const struct pim_msdp_mg_mbr
*mbr2
= p2
;
1218 if (ntohl(mbr1
->mbr_ip
.s_addr
) < ntohl(mbr2
->mbr_ip
.s_addr
))
1221 if (ntohl(mbr1
->mbr_ip
.s_addr
) > ntohl(mbr2
->mbr_ip
.s_addr
))
1227 static void pim_msdp_mg_mbr_free(struct pim_msdp_mg_mbr
*mbr
)
1229 XFREE(MTYPE_PIM_MSDP_MG_MBR
, mbr
);
1232 void pim_msdp_mg_mbr_del(struct pim_msdp_mg
*mg
, struct pim_msdp_mg_mbr
*mbr
)
1234 /* Delete active peer session if any */
1236 pim_msdp_peer_del(&mbr
->mp
);
1239 listnode_delete(mg
->mbr_list
, mbr
);
1240 if (PIM_DEBUG_MSDP_EVENTS
) {
1241 char ip_str
[INET_ADDRSTRLEN
];
1242 pim_inet4_dump("<mbr?>", mbr
->mbr_ip
, ip_str
, sizeof(ip_str
));
1243 zlog_debug("MSDP mesh-group %s mbr %s deleted",
1244 mg
->mesh_group_name
, ip_str
);
1246 pim_msdp_mg_mbr_free(mbr
);
1252 static void pim_msdp_src_del(struct pim_msdp_mg
*mg
)
1254 struct pim_msdp_mg_mbr
*mbr
;
1255 struct listnode
*mbr_node
;
1257 /* SIP is being removed - tear down all active peer sessions */
1258 for (ALL_LIST_ELEMENTS_RO(mg
->mbr_list
, mbr_node
, mbr
)) {
1260 pim_msdp_peer_del(&mbr
->mp
);
1262 if (PIM_DEBUG_MSDP_EVENTS
) {
1263 zlog_debug("MSDP mesh-group %s src cleared",
1264 mg
->mesh_group_name
);
1268 /*********************** MSDP feature APIs *********************************/
1269 int pim_msdp_config_write(struct pim_instance
*pim
, struct vty
*vty
,
1272 struct pim_msdp_mg
*mg
;
1273 struct listnode
*mbrnode
;
1274 struct pim_msdp_mg_mbr
*mbr
;
1275 char src_str
[INET_ADDRSTRLEN
];
1278 if (SLIST_EMPTY(&pim
->msdp
.mglist
))
1281 SLIST_FOREACH (mg
, &pim
->msdp
.mglist
, mg_entry
) {
1282 if (mg
->src_ip
.s_addr
!= INADDR_ANY
) {
1283 pim_inet4_dump("<src?>", mg
->src_ip
, src_str
,
1285 vty_out(vty
, "%sip msdp mesh-group %s source %s\n",
1286 spaces
, mg
->mesh_group_name
, src_str
);
1290 for (ALL_LIST_ELEMENTS_RO(mg
->mbr_list
, mbrnode
, mbr
)) {
1291 vty_out(vty
, "%sip msdp mesh-group %s member %pI4\n",
1292 spaces
, mg
->mesh_group_name
, &mbr
->mbr_ip
);
1300 bool pim_msdp_peer_config_write(struct vty
*vty
, struct pim_instance
*pim
,
1303 struct pim_msdp_peer
*mp
;
1304 struct listnode
*node
;
1305 bool written
= false;
1307 for (ALL_LIST_ELEMENTS_RO(pim
->msdp
.peer_list
, node
, mp
)) {
1308 /* Skip meshed group peers. */
1309 if (mp
->flags
& PIM_MSDP_PEERF_IN_GROUP
)
1312 vty_out(vty
, "%sip msdp peer %pI4 source %pI4\n", spaces
,
1313 &mp
->peer
, &mp
->local
);
1320 /* Enable feature including active/periodic timers etc. on the first peer
1321 * config. Till then MSDP should just stay quiet. */
1322 static void pim_msdp_enable(struct pim_instance
*pim
)
1324 if (pim
->msdp
.flags
& PIM_MSDPF_ENABLE
) {
1325 /* feature is already enabled */
1328 pim
->msdp
.flags
|= PIM_MSDPF_ENABLE
;
1329 pim
->msdp
.work_obuf
= stream_new(PIM_MSDP_MAX_PACKET_SIZE
);
1330 pim_msdp_sa_adv_timer_setup(pim
, true /* start */);
1331 /* setup sa cache based on local sources */
1332 pim_msdp_sa_local_setup(pim
);
1336 void pim_msdp_init(struct pim_instance
*pim
, struct event_loop
*master
)
1338 pim
->msdp
.master
= master
;
1341 snprintf(hash_name
, sizeof(hash_name
), "PIM %s MSDP Peer Hash",
1343 pim
->msdp
.peer_hash
= hash_create(pim_msdp_peer_hash_key_make
,
1344 pim_msdp_peer_hash_eq
, hash_name
);
1345 pim
->msdp
.peer_list
= list_new();
1346 pim
->msdp
.peer_list
->del
= (void (*)(void *))pim_msdp_peer_free
;
1347 pim
->msdp
.peer_list
->cmp
= (int (*)(void *, void *))pim_msdp_peer_comp
;
1349 snprintf(hash_name
, sizeof(hash_name
), "PIM %s MSDP SA Hash",
1351 pim
->msdp
.sa_hash
= hash_create(pim_msdp_sa_hash_key_make
,
1352 pim_msdp_sa_hash_eq
, hash_name
);
1353 pim
->msdp
.sa_list
= list_new();
1354 pim
->msdp
.sa_list
->del
= (void (*)(void *))pim_msdp_sa_free
;
1355 pim
->msdp
.sa_list
->cmp
= (int (*)(void *, void *))pim_msdp_sa_comp
;
1358 /* counterpart to MSDP init; XXX: unused currently */
1359 void pim_msdp_exit(struct pim_instance
*pim
)
1361 struct pim_msdp_mg
*mg
;
1363 pim_msdp_sa_adv_timer_setup(pim
, false);
1365 /* Stop listener and delete all peer sessions */
1366 while ((mg
= SLIST_FIRST(&pim
->msdp
.mglist
)) != NULL
)
1367 pim_msdp_mg_free(pim
, &mg
);
1369 hash_clean_and_free(&pim
->msdp
.peer_hash
, NULL
);
1371 if (pim
->msdp
.peer_list
) {
1372 list_delete(&pim
->msdp
.peer_list
);
1375 hash_clean_and_free(&pim
->msdp
.sa_hash
, NULL
);
1377 if (pim
->msdp
.sa_list
) {
1378 list_delete(&pim
->msdp
.sa_list
);
1381 if (pim
->msdp
.work_obuf
)
1382 stream_free(pim
->msdp
.work_obuf
);
1383 pim
->msdp
.work_obuf
= NULL
;
1386 void pim_msdp_mg_src_add(struct pim_instance
*pim
, struct pim_msdp_mg
*mg
,
1389 struct pim_msdp_mg_mbr
*mbr
;
1390 struct listnode
*mbr_node
;
1392 /* Stop all connections and remove data structures. */
1393 pim_msdp_src_del(mg
);
1395 /* Set new address. */
1398 /* No new address, disable everyone. */
1399 if (ai
->s_addr
== INADDR_ANY
) {
1400 if (PIM_DEBUG_MSDP_EVENTS
)
1401 zlog_debug("MSDP mesh-group %s src unset",
1402 mg
->mesh_group_name
);
1406 /* Create data structures and start TCP connection. */
1407 for (ALL_LIST_ELEMENTS_RO(mg
->mbr_list
, mbr_node
, mbr
))
1408 mbr
->mp
= pim_msdp_peer_add(pim
, &mbr
->mbr_ip
, &mg
->src_ip
,
1409 mg
->mesh_group_name
);
1411 if (PIM_DEBUG_MSDP_EVENTS
)
1412 zlog_debug("MSDP mesh-group %s src %pI4 set",
1413 mg
->mesh_group_name
, &mg
->src_ip
);
1416 struct pim_msdp_mg_mbr
*pim_msdp_mg_mbr_add(struct pim_instance
*pim
,
1417 struct pim_msdp_mg
*mg
,
1420 struct pim_msdp_mg_mbr
*mbr
;
1422 mbr
= XCALLOC(MTYPE_PIM_MSDP_MG_MBR
, sizeof(*mbr
));
1424 listnode_add_sort(mg
->mbr_list
, mbr
);
1426 /* if valid SIP has been configured add peer session */
1427 if (mg
->src_ip
.s_addr
!= INADDR_ANY
)
1428 mbr
->mp
= pim_msdp_peer_add(pim
, &mbr
->mbr_ip
, &mg
->src_ip
,
1429 mg
->mesh_group_name
);
1431 if (PIM_DEBUG_MSDP_EVENTS
)
1432 zlog_debug("MSDP mesh-group %s mbr %pI4 created",
1433 mg
->mesh_group_name
, &mbr
->mbr_ip
);