3 * Copyright (C) 2016 Cumulus Networks, Inc.
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
23 #include <lib/jhash.h>
25 #include <lib/prefix.h>
26 #include <lib/sockunion.h>
27 #include <lib/stream.h>
28 #include <lib/thread.h>
30 #include <lib/plist.h>
31 #include <lib/lib_errors.h>
35 #include "pim_memory.h"
36 #include "pim_iface.h"
40 #include "pim_upstream.h"
44 #include "pim_msdp_packet.h"
45 #include "pim_msdp_socket.h"
47 // struct pim_msdp pim_msdp, *msdp = &pim_msdp;
49 static void pim_msdp_peer_listen(struct pim_msdp_peer
*mp
);
50 static void pim_msdp_peer_cr_timer_setup(struct pim_msdp_peer
*mp
, bool start
);
51 static void pim_msdp_peer_ka_timer_setup(struct pim_msdp_peer
*mp
, bool start
);
52 static void pim_msdp_peer_hold_timer_setup(struct pim_msdp_peer
*mp
,
54 static void pim_msdp_peer_free(struct pim_msdp_peer
*mp
);
55 static void pim_msdp_enable(struct pim_instance
*pim
);
56 static void pim_msdp_sa_adv_timer_setup(struct pim_instance
*pim
, bool start
);
57 static void pim_msdp_sa_deref(struct pim_msdp_sa
*sa
,
58 enum pim_msdp_sa_flags flags
);
59 static int pim_msdp_mg_mbr_comp(const void *p1
, const void *p2
);
60 static void pim_msdp_mg_mbr_free(struct pim_msdp_mg_mbr
*mbr
);
61 static void pim_msdp_mg_mbr_do_del(struct pim_msdp_mg
*mg
,
62 struct pim_msdp_mg_mbr
*mbr
);
64 /************************ SA cache management ******************************/
65 static void pim_msdp_sa_timer_expiry_log(struct pim_msdp_sa
*sa
,
66 const char *timer_str
)
68 zlog_debug("MSDP SA %s %s timer expired", sa
->sg_str
, timer_str
);
71 /* RFC-3618:Sec-5.1 - global active source advertisement timer */
72 static int pim_msdp_sa_adv_timer_cb(struct thread
*t
)
74 struct pim_instance
*pim
= THREAD_ARG(t
);
76 if (PIM_DEBUG_MSDP_EVENTS
) {
77 zlog_debug("MSDP SA advertisement timer expired");
80 pim_msdp_sa_adv_timer_setup(pim
, true /* start */);
81 pim_msdp_pkt_sa_tx(pim
);
84 static void pim_msdp_sa_adv_timer_setup(struct pim_instance
*pim
, bool start
)
86 THREAD_OFF(pim
->msdp
.sa_adv_timer
);
88 thread_add_timer(pim
->msdp
.master
, pim_msdp_sa_adv_timer_cb
,
89 pim
, PIM_MSDP_SA_ADVERTISMENT_TIME
,
90 &pim
->msdp
.sa_adv_timer
);
94 /* RFC-3618:Sec-5.3 - SA cache state timer */
95 static int pim_msdp_sa_state_timer_cb(struct thread
*t
)
97 struct pim_msdp_sa
*sa
;
101 if (PIM_DEBUG_MSDP_EVENTS
) {
102 pim_msdp_sa_timer_expiry_log(sa
, "state");
105 pim_msdp_sa_deref(sa
, PIM_MSDP_SAF_PEER
);
108 static void pim_msdp_sa_state_timer_setup(struct pim_msdp_sa
*sa
, bool start
)
110 THREAD_OFF(sa
->sa_state_timer
);
112 thread_add_timer(sa
->pim
->msdp
.master
,
113 pim_msdp_sa_state_timer_cb
, sa
,
114 PIM_MSDP_SA_HOLD_TIME
, &sa
->sa_state_timer
);
118 static void pim_msdp_sa_upstream_del(struct pim_msdp_sa
*sa
)
120 struct pim_upstream
*up
= sa
->up
;
126 if (PIM_UPSTREAM_FLAG_TEST_SRC_MSDP(up
->flags
)) {
127 PIM_UPSTREAM_FLAG_UNSET_SRC_MSDP(up
->flags
);
128 sa
->flags
|= PIM_MSDP_SAF_UP_DEL_IN_PROG
;
129 pim_upstream_del(sa
->pim
, up
, __PRETTY_FUNCTION__
);
130 sa
->flags
&= ~PIM_MSDP_SAF_UP_DEL_IN_PROG
;
133 if (PIM_DEBUG_MSDP_EVENTS
) {
134 zlog_debug("MSDP SA %s de-referenced SPT", sa
->sg_str
);
138 static bool pim_msdp_sa_upstream_add_ok(struct pim_msdp_sa
*sa
,
139 struct pim_upstream
*xg_up
)
141 if (!(sa
->flags
& PIM_MSDP_SAF_PEER
)) {
142 /* SA should have been rxed from a peer */
145 /* check if we are RP */
146 if (!I_am_RP(sa
->pim
, sa
->sg
.grp
)) {
150 /* check if we have a (*, G) with a non-empty immediate OIL */
154 memset(&sg
, 0, sizeof(sg
));
157 xg_up
= pim_upstream_find(sa
->pim
, &sg
);
159 if (!xg_up
|| (xg_up
->join_state
!= PIM_UPSTREAM_JOINED
)) {
160 /* join desired will be true for such (*, G) entries so we will
161 * just look at join_state and let the PIM state machine do the
170 /* Upstream add evaluation needs to happen everytime -
171 * 1. Peer reference is added or removed.
172 * 2. The RP for a group changes.
173 * 3. joinDesired for the associated (*, G) changes
174 * 4. associated (*, G) is removed - this seems like a bit redundant
175 * (considering #4); but just in case an entry gets nuked without
176 * upstream state transition
178 static void pim_msdp_sa_upstream_update(struct pim_msdp_sa
*sa
,
179 struct pim_upstream
*xg_up
,
182 struct pim_upstream
*up
;
184 if (!pim_msdp_sa_upstream_add_ok(sa
, xg_up
)) {
185 pim_msdp_sa_upstream_del(sa
);
194 up
= pim_upstream_find(sa
->pim
, &sa
->sg
);
195 if (up
&& (PIM_UPSTREAM_FLAG_TEST_SRC_MSDP(up
->flags
))) {
196 /* somehow we lost track of the upstream ptr? best log it */
198 if (PIM_DEBUG_MSDP_EVENTS
) {
199 zlog_debug("MSDP SA %s SPT reference missing",
205 /* RFC3618: "RP triggers a (S, G) join event towards the data source
206 * as if a JP message was rxed addressed to the RP itself." */
207 up
= pim_upstream_add(sa
->pim
, &sa
->sg
, NULL
/* iif */,
208 PIM_UPSTREAM_FLAG_MASK_SRC_MSDP
,
209 __PRETTY_FUNCTION__
, NULL
);
213 /* update inherited oil */
214 pim_upstream_inherited_olist(sa
->pim
, up
);
215 /* should we also start the kat in parallel? we will need it
218 if (PIM_DEBUG_MSDP_EVENTS
) {
219 zlog_debug("MSDP SA %s referenced SPT", sa
->sg_str
);
222 if (PIM_DEBUG_MSDP_EVENTS
) {
223 zlog_debug("MSDP SA %s SPT reference failed",
229 /* release all mem associated with a sa */
230 static void pim_msdp_sa_free(struct pim_msdp_sa
*sa
)
232 pim_msdp_sa_state_timer_setup(sa
, false);
234 XFREE(MTYPE_PIM_MSDP_SA
, sa
);
237 static struct pim_msdp_sa
*pim_msdp_sa_new(struct pim_instance
*pim
,
238 struct prefix_sg
*sg
,
241 struct pim_msdp_sa
*sa
;
243 sa
= XCALLOC(MTYPE_PIM_MSDP_SA
, sizeof(*sa
));
247 pim_str_sg_set(sg
, sa
->sg_str
);
249 sa
->uptime
= pim_time_monotonic_sec();
251 /* insert into misc tables for easy access */
252 sa
= hash_get(pim
->msdp
.sa_hash
, sa
, hash_alloc_intern
);
253 listnode_add_sort(pim
->msdp
.sa_list
, sa
);
255 if (PIM_DEBUG_MSDP_EVENTS
) {
256 zlog_debug("MSDP SA %s created", sa
->sg_str
);
262 static struct pim_msdp_sa
*pim_msdp_sa_find(struct pim_instance
*pim
,
263 struct prefix_sg
*sg
)
265 struct pim_msdp_sa lookup
;
268 return hash_lookup(pim
->msdp
.sa_hash
, &lookup
);
271 static struct pim_msdp_sa
*pim_msdp_sa_add(struct pim_instance
*pim
,
272 struct prefix_sg
*sg
,
275 struct pim_msdp_sa
*sa
;
277 sa
= pim_msdp_sa_find(pim
, sg
);
282 return pim_msdp_sa_new(pim
, sg
, rp
);
285 static void pim_msdp_sa_del(struct pim_msdp_sa
*sa
)
287 /* this is somewhat redundant - still want to be careful not to leave
288 * stale upstream references */
289 pim_msdp_sa_upstream_del(sa
);
292 pim_msdp_sa_state_timer_setup(sa
, false /* start */);
294 /* remove the entry from various tables */
295 listnode_delete(sa
->pim
->msdp
.sa_list
, sa
);
296 hash_release(sa
->pim
->msdp
.sa_hash
, sa
);
298 if (PIM_DEBUG_MSDP_EVENTS
) {
299 zlog_debug("MSDP SA %s deleted", sa
->sg_str
);
302 /* free up any associated memory */
303 pim_msdp_sa_free(sa
);
306 static void pim_msdp_sa_peer_ip_set(struct pim_msdp_sa
*sa
,
307 struct pim_msdp_peer
*mp
, struct in_addr rp
)
309 struct pim_msdp_peer
*old_mp
;
311 /* optimize the "no change" case as it will happen
312 * frequently/periodically */
313 if (mp
&& (sa
->peer
.s_addr
== mp
->peer
.s_addr
)) {
317 /* any time the peer ip changes also update the rp address */
318 if (PIM_INADDR_ISNOT_ANY(sa
->peer
)) {
319 old_mp
= pim_msdp_peer_find(sa
->pim
, sa
->peer
);
320 if (old_mp
&& old_mp
->sa_cnt
) {
329 sa
->peer
.s_addr
= PIM_NET_INADDR_ANY
;
334 /* When a local active-source is removed there is no way to withdraw the
335 * source from peers. We will simply remove it from the SA cache so it will
336 * not be sent in supsequent SA updates. Peers will consequently timeout the
338 * Similarly a "peer-added" SA is never explicitly deleted. It is simply
339 * aged out overtime if not seen in the SA updates from the peers.
340 * XXX: should we provide a knob to drop entries learnt from a peer when the
342 static void pim_msdp_sa_deref(struct pim_msdp_sa
*sa
,
343 enum pim_msdp_sa_flags flags
)
345 bool update_up
= false;
347 if ((sa
->flags
& PIM_MSDP_SAF_LOCAL
)) {
348 if (flags
& PIM_MSDP_SAF_LOCAL
) {
349 if (PIM_DEBUG_MSDP_EVENTS
) {
350 zlog_debug("MSDP SA %s local reference removed",
353 if (sa
->pim
->msdp
.local_cnt
)
354 --sa
->pim
->msdp
.local_cnt
;
358 if ((sa
->flags
& PIM_MSDP_SAF_PEER
)) {
359 if (flags
& PIM_MSDP_SAF_PEER
) {
362 if (PIM_DEBUG_MSDP_EVENTS
) {
363 zlog_debug("MSDP SA %s peer reference removed",
366 pim_msdp_sa_state_timer_setup(sa
, false /* start */);
367 rp
.s_addr
= INADDR_ANY
;
368 pim_msdp_sa_peer_ip_set(sa
, NULL
/* mp */, rp
);
369 /* if peer ref was removed we need to remove the msdp
378 pim_msdp_sa_upstream_update(sa
, NULL
/* xg_up */, "sa-deref");
381 if (!(sa
->flags
& PIM_MSDP_SAF_REF
)) {
386 void pim_msdp_sa_ref(struct pim_instance
*pim
, struct pim_msdp_peer
*mp
,
387 struct prefix_sg
*sg
, struct in_addr rp
)
389 struct pim_msdp_sa
*sa
;
391 sa
= pim_msdp_sa_add(pim
, sg
, rp
);
398 if (!(sa
->flags
& PIM_MSDP_SAF_PEER
)) {
399 sa
->flags
|= PIM_MSDP_SAF_PEER
;
400 if (PIM_DEBUG_MSDP_EVENTS
) {
401 zlog_debug("MSDP SA %s added by peer",
405 pim_msdp_sa_peer_ip_set(sa
, mp
, rp
);
406 /* start/re-start the state timer to prevent cache expiry */
407 pim_msdp_sa_state_timer_setup(sa
, true /* start */);
408 /* We re-evaluate SA "SPT-trigger" everytime we hear abt it from
410 * peer. XXX: If this becomes too much of a periodic overhead we
411 * can make it event based */
412 pim_msdp_sa_upstream_update(sa
, NULL
/* xg_up */, "peer-ref");
414 if (!(sa
->flags
& PIM_MSDP_SAF_LOCAL
)) {
415 sa
->flags
|= PIM_MSDP_SAF_LOCAL
;
416 ++sa
->pim
->msdp
.local_cnt
;
417 if (PIM_DEBUG_MSDP_EVENTS
) {
418 zlog_debug("MSDP SA %s added locally",
421 /* send an immediate SA update to peers */
422 pim_msdp_pkt_sa_tx_one(sa
);
424 sa
->flags
&= ~PIM_MSDP_SAF_STALE
;
428 /* The following criteria must be met to originate an SA from the MSDP
430 * 1. KAT must be running i.e. source is active.
431 * 2. We must be RP for the group.
432 * 3. Source must be registrable to the RP (this is where the RFC is vague
433 * and especially ambiguous in CLOS networks; with anycast RP all sources
434 * are potentially registrable to all RPs in the domain). We assume #3 is
436 * a. We are also the FHR-DR for the source (OR)
437 * b. We rxed a pim register (null or data encapsulated) within the last
438 * (3 * (1.5 * register_suppression_timer))).
440 static bool pim_msdp_sa_local_add_ok(struct pim_upstream
*up
)
442 struct pim_instance
*pim
= up
->channel_oil
->pim
;
444 if (!(pim
->msdp
.flags
& PIM_MSDPF_ENABLE
)) {
448 if (!up
->t_ka_timer
) {
449 /* stream is not active */
453 if (!I_am_RP(pim
, up
->sg
.grp
)) {
454 /* we are not RP for the group */
458 /* we are the FHR-DR for this stream or we are RP and have seen
460 * from a FHR for this source */
461 if (PIM_UPSTREAM_FLAG_TEST_FHR(up
->flags
) || up
->t_msdp_reg_timer
) {
468 static void pim_msdp_sa_local_add(struct pim_instance
*pim
,
469 struct prefix_sg
*sg
)
473 pim_msdp_sa_ref(pim
, NULL
/* mp */, sg
, rp
);
476 void pim_msdp_sa_local_del(struct pim_instance
*pim
, struct prefix_sg
*sg
)
478 struct pim_msdp_sa
*sa
;
480 sa
= pim_msdp_sa_find(pim
, sg
);
482 pim_msdp_sa_deref(sa
, PIM_MSDP_SAF_LOCAL
);
486 /* we need to be very cautious with this API as SA del too can trigger an
487 * upstream del and we will get stuck in a simple loop */
488 static void pim_msdp_sa_local_del_on_up_del(struct pim_instance
*pim
,
489 struct prefix_sg
*sg
)
491 struct pim_msdp_sa
*sa
;
493 sa
= pim_msdp_sa_find(pim
, sg
);
495 if (PIM_DEBUG_MSDP_INTERNAL
) {
496 zlog_debug("MSDP local sa %s del on up del",
500 /* if there is no local reference escape */
501 if (!(sa
->flags
& PIM_MSDP_SAF_LOCAL
)) {
502 if (PIM_DEBUG_MSDP_INTERNAL
) {
503 zlog_debug("MSDP local sa %s del; no local ref",
509 if (sa
->flags
& PIM_MSDP_SAF_UP_DEL_IN_PROG
) {
510 /* MSDP is the one that triggered the upstream del. if
512 * we most certainly have a bug in the PIM upstream
514 * will not have a local reference unless the KAT is
515 * running. And if the
516 * KAT is running there MUST be an additional
517 * source-stream reference to
518 * the flow. Accounting for such cases requires lot of
520 * address this in the next release? - XXX */
523 "MSDP sa %s SPT teardown is causing the local entry to be removed",
528 /* we are dropping the sa on upstream del we should not have an
529 * upstream reference */
531 if (PIM_DEBUG_MSDP_INTERNAL
) {
532 zlog_debug("MSDP local sa %s del; up non-NULL",
537 pim_msdp_sa_deref(sa
, PIM_MSDP_SAF_LOCAL
);
541 /* Local SA qualification needs to be re-evaluated when -
542 * 1. KAT is started or stopped
544 * 3. Whenever FHR status changes for a (S,G) - XXX - currently there
545 * is no clear path to transition an entry out of "MASK_FHR" need
546 * to discuss this with Donald. May result in some strangeness if the
547 * FHR is also the RP.
548 * 4. When msdp_reg timer is started or stopped
550 void pim_msdp_sa_local_update(struct pim_upstream
*up
)
552 struct pim_instance
*pim
= up
->channel_oil
->pim
;
554 if (pim_msdp_sa_local_add_ok(up
)) {
555 pim_msdp_sa_local_add(pim
, &up
->sg
);
557 pim_msdp_sa_local_del(pim
, &up
->sg
);
561 static void pim_msdp_sa_local_setup(struct pim_instance
*pim
)
563 struct pim_upstream
*up
;
564 struct listnode
*up_node
;
566 for (ALL_LIST_ELEMENTS_RO(pim
->upstream_list
, up_node
, up
)) {
567 pim_msdp_sa_local_update(up
);
571 /* whenever the RP changes we need to re-evaluate the "local" SA-cache */
572 /* XXX: needs to be tested */
573 void pim_msdp_i_am_rp_changed(struct pim_instance
*pim
)
575 struct listnode
*sanode
;
576 struct listnode
*nextnode
;
577 struct pim_msdp_sa
*sa
;
579 if (!(pim
->msdp
.flags
& PIM_MSDPF_ENABLE
)) {
580 /* if the feature is not enabled do nothing */
584 if (PIM_DEBUG_MSDP_INTERNAL
) {
585 zlog_debug("MSDP i_am_rp changed");
588 /* mark all local entries as stale */
589 for (ALL_LIST_ELEMENTS_RO(pim
->msdp
.sa_list
, sanode
, sa
)) {
590 if (sa
->flags
& PIM_MSDP_SAF_LOCAL
) {
591 sa
->flags
|= PIM_MSDP_SAF_STALE
;
595 /* re-setup local SA entries */
596 pim_msdp_sa_local_setup(pim
);
598 for (ALL_LIST_ELEMENTS(pim
->msdp
.sa_list
, sanode
, nextnode
, sa
)) {
599 /* purge stale SA entries */
600 if (sa
->flags
& PIM_MSDP_SAF_STALE
) {
601 /* clear the stale flag; the entry may be kept even
604 sa
->flags
&= ~PIM_MSDP_SAF_STALE
;
605 /* sa_deref can end up freeing the sa; so don't access
607 pim_msdp_sa_deref(sa
, PIM_MSDP_SAF_LOCAL
);
609 /* if the souce is still active check if we can
611 pim_msdp_sa_upstream_update(sa
, NULL
/* xg_up */,
617 /* We track the join state of (*, G) entries. If G has sources in the SA-cache
618 * we need to setup or teardown SPT when the JoinDesired status changes for
620 void pim_msdp_up_join_state_changed(struct pim_instance
*pim
,
621 struct pim_upstream
*xg_up
)
623 struct listnode
*sanode
;
624 struct pim_msdp_sa
*sa
;
626 if (PIM_DEBUG_MSDP_INTERNAL
) {
627 zlog_debug("MSDP join state changed for %s", xg_up
->sg_str
);
630 /* If this is not really an XG entry just move on */
631 if ((xg_up
->sg
.src
.s_addr
!= INADDR_ANY
)
632 || (xg_up
->sg
.grp
.s_addr
== INADDR_ANY
)) {
636 /* XXX: Need to maintain SAs per-group to avoid all this unnecessary
638 for (ALL_LIST_ELEMENTS_RO(pim
->msdp
.sa_list
, sanode
, sa
)) {
639 if (sa
->sg
.grp
.s_addr
!= xg_up
->sg
.grp
.s_addr
) {
642 pim_msdp_sa_upstream_update(sa
, xg_up
, "up-jp-change");
646 static void pim_msdp_up_xg_del(struct pim_instance
*pim
, struct prefix_sg
*sg
)
648 struct listnode
*sanode
;
649 struct pim_msdp_sa
*sa
;
651 if (PIM_DEBUG_MSDP_INTERNAL
) {
652 zlog_debug("MSDP %s del", pim_str_sg_dump(sg
));
655 /* If this is not really an XG entry just move on */
656 if ((sg
->src
.s_addr
!= INADDR_ANY
) || (sg
->grp
.s_addr
== INADDR_ANY
)) {
660 /* XXX: Need to maintain SAs per-group to avoid all this unnecessary
662 for (ALL_LIST_ELEMENTS_RO(pim
->msdp
.sa_list
, sanode
, sa
)) {
663 if (sa
->sg
.grp
.s_addr
!= sg
->grp
.s_addr
) {
666 pim_msdp_sa_upstream_update(sa
, NULL
/* xg */, "up-jp-change");
670 void pim_msdp_up_del(struct pim_instance
*pim
, struct prefix_sg
*sg
)
672 if (PIM_DEBUG_MSDP_INTERNAL
) {
673 zlog_debug("MSDP up %s del", pim_str_sg_dump(sg
));
675 if (sg
->src
.s_addr
== INADDR_ANY
) {
676 pim_msdp_up_xg_del(pim
, sg
);
678 pim_msdp_sa_local_del_on_up_del(pim
, sg
);
682 /* sa hash and peer list helpers */
683 static unsigned int pim_msdp_sa_hash_key_make(void *p
)
685 struct pim_msdp_sa
*sa
= p
;
687 return (jhash_2words(sa
->sg
.src
.s_addr
, sa
->sg
.grp
.s_addr
, 0));
690 static bool pim_msdp_sa_hash_eq(const void *p1
, const void *p2
)
692 const struct pim_msdp_sa
*sa1
= p1
;
693 const struct pim_msdp_sa
*sa2
= p2
;
695 return ((sa1
->sg
.src
.s_addr
== sa2
->sg
.src
.s_addr
)
696 && (sa1
->sg
.grp
.s_addr
== sa2
->sg
.grp
.s_addr
));
699 static int pim_msdp_sa_comp(const void *p1
, const void *p2
)
701 const struct pim_msdp_sa
*sa1
= p1
;
702 const struct pim_msdp_sa
*sa2
= p2
;
704 if (ntohl(sa1
->sg
.grp
.s_addr
) < ntohl(sa2
->sg
.grp
.s_addr
))
707 if (ntohl(sa1
->sg
.grp
.s_addr
) > ntohl(sa2
->sg
.grp
.s_addr
))
710 if (ntohl(sa1
->sg
.src
.s_addr
) < ntohl(sa2
->sg
.src
.s_addr
))
713 if (ntohl(sa1
->sg
.src
.s_addr
) > ntohl(sa2
->sg
.src
.s_addr
))
719 /* RFC-3618:Sec-10.1.3 - Peer-RPF forwarding */
720 /* XXX: this can use a bit of refining and extensions */
721 bool pim_msdp_peer_rpf_check(struct pim_msdp_peer
*mp
, struct in_addr rp
)
723 if (mp
->peer
.s_addr
== rp
.s_addr
) {
730 /************************ Peer session management **************************/
731 char *pim_msdp_state_dump(enum pim_msdp_peer_state state
, char *buf
,
735 case PIM_MSDP_DISABLED
:
736 snprintf(buf
, buf_size
, "%s", "disabled");
738 case PIM_MSDP_INACTIVE
:
739 snprintf(buf
, buf_size
, "%s", "inactive");
741 case PIM_MSDP_LISTEN
:
742 snprintf(buf
, buf_size
, "%s", "listen");
744 case PIM_MSDP_CONNECTING
:
745 snprintf(buf
, buf_size
, "%s", "connecting");
747 case PIM_MSDP_ESTABLISHED
:
748 snprintf(buf
, buf_size
, "%s", "established");
751 snprintf(buf
, buf_size
, "unk-%d", state
);
756 char *pim_msdp_peer_key_dump(struct pim_msdp_peer
*mp
, char *buf
, int buf_size
,
759 char peer_str
[INET_ADDRSTRLEN
];
760 char local_str
[INET_ADDRSTRLEN
];
762 pim_inet4_dump("<peer?>", mp
->peer
, peer_str
, sizeof(peer_str
));
764 pim_inet4_dump("<local?>", mp
->local
, local_str
,
766 snprintf(buf
, buf_size
, "MSDP peer %s local %s mg %s", peer_str
,
767 local_str
, mp
->mesh_group_name
);
769 snprintf(buf
, buf_size
, "MSDP peer %s", peer_str
);
775 static void pim_msdp_peer_state_chg_log(struct pim_msdp_peer
*mp
)
777 char state_str
[PIM_MSDP_STATE_STRLEN
];
779 pim_msdp_state_dump(mp
->state
, state_str
, sizeof(state_str
));
780 zlog_debug("MSDP peer %s state chg to %s", mp
->key_str
, state_str
);
783 /* MSDP Connection State Machine actions (defined in RFC-3618:Sec-11.2) */
784 /* 11.2.A2: active peer - start connect retry timer; when the timer fires
785 * a tcp connection will be made */
786 static void pim_msdp_peer_connect(struct pim_msdp_peer
*mp
)
788 mp
->state
= PIM_MSDP_CONNECTING
;
789 if (PIM_DEBUG_MSDP_EVENTS
) {
790 pim_msdp_peer_state_chg_log(mp
);
793 pim_msdp_peer_cr_timer_setup(mp
, true /* start */);
796 /* 11.2.A3: passive peer - just listen for connections */
797 static void pim_msdp_peer_listen(struct pim_msdp_peer
*mp
)
799 mp
->state
= PIM_MSDP_LISTEN
;
800 if (PIM_DEBUG_MSDP_EVENTS
) {
801 pim_msdp_peer_state_chg_log(mp
);
804 /* this is interntionally asymmetric i.e. we set up listen-socket when
806 * first listening peer is configured; but don't bother tearing it down
808 * all the peers go down */
809 pim_msdp_sock_listen(mp
->pim
);
812 /* 11.2.A4 and 11.2.A5: transition active or passive peer to
813 * established state */
814 void pim_msdp_peer_established(struct pim_msdp_peer
*mp
)
816 if (mp
->state
!= PIM_MSDP_ESTABLISHED
) {
820 mp
->state
= PIM_MSDP_ESTABLISHED
;
821 mp
->uptime
= pim_time_monotonic_sec();
823 if (PIM_DEBUG_MSDP_EVENTS
) {
824 pim_msdp_peer_state_chg_log(mp
);
827 /* stop retry timer on active peers */
828 pim_msdp_peer_cr_timer_setup(mp
, false /* start */);
830 /* send KA; start KA and hold timers */
831 pim_msdp_pkt_ka_tx(mp
);
832 pim_msdp_peer_ka_timer_setup(mp
, true /* start */);
833 pim_msdp_peer_hold_timer_setup(mp
, true /* start */);
835 pim_msdp_pkt_sa_tx_to_one_peer(mp
);
837 PIM_MSDP_PEER_WRITE_ON(mp
);
838 PIM_MSDP_PEER_READ_ON(mp
);
841 /* 11.2.A6, 11.2.A7 and 11.2.A8: shutdown the peer tcp connection */
842 void pim_msdp_peer_stop_tcp_conn(struct pim_msdp_peer
*mp
, bool chg_state
)
845 if (mp
->state
== PIM_MSDP_ESTABLISHED
) {
848 mp
->state
= PIM_MSDP_INACTIVE
;
849 if (PIM_DEBUG_MSDP_EVENTS
) {
850 pim_msdp_peer_state_chg_log(mp
);
854 if (PIM_DEBUG_MSDP_INTERNAL
) {
855 zlog_debug("MSDP peer %s pim_msdp_peer_stop_tcp_conn",
858 /* stop read and write threads */
859 PIM_MSDP_PEER_READ_OFF(mp
);
860 PIM_MSDP_PEER_WRITE_OFF(mp
);
865 stream_reset(mp
->ibuf
);
867 stream_fifo_clean(mp
->obuf
);
869 /* stop all peer timers */
870 pim_msdp_peer_ka_timer_setup(mp
, false /* start */);
871 pim_msdp_peer_cr_timer_setup(mp
, false /* start */);
872 pim_msdp_peer_hold_timer_setup(mp
, false /* start */);
874 /* close connection */
881 /* RFC-3618:Sec-5.6 - stop the peer tcp connection and startover */
882 void pim_msdp_peer_reset_tcp_conn(struct pim_msdp_peer
*mp
, const char *rc_str
)
884 if (PIM_DEBUG_EVENTS
) {
885 zlog_debug("MSDP peer %s tcp reset %s", mp
->key_str
, rc_str
);
886 snprintf(mp
->last_reset
, sizeof(mp
->last_reset
), "%s", rc_str
);
889 /* close the connection and transition to listening or connecting */
890 pim_msdp_peer_stop_tcp_conn(mp
, true /* chg_state */);
891 if (PIM_MSDP_PEER_IS_LISTENER(mp
)) {
892 pim_msdp_peer_listen(mp
);
894 pim_msdp_peer_connect(mp
);
898 static void pim_msdp_peer_timer_expiry_log(struct pim_msdp_peer
*mp
,
899 const char *timer_str
)
901 zlog_debug("MSDP peer %s %s timer expired", mp
->key_str
, timer_str
);
904 /* RFC-3618:Sec-5.4 - peer hold timer */
905 static int pim_msdp_peer_hold_timer_cb(struct thread
*t
)
907 struct pim_msdp_peer
*mp
;
911 if (PIM_DEBUG_MSDP_EVENTS
) {
912 pim_msdp_peer_timer_expiry_log(mp
, "hold");
915 if (mp
->state
!= PIM_MSDP_ESTABLISHED
) {
919 if (PIM_DEBUG_MSDP_EVENTS
) {
920 pim_msdp_peer_state_chg_log(mp
);
922 pim_msdp_peer_reset_tcp_conn(mp
, "ht-expired");
926 static void pim_msdp_peer_hold_timer_setup(struct pim_msdp_peer
*mp
, bool start
)
928 struct pim_instance
*pim
= mp
->pim
;
929 THREAD_OFF(mp
->hold_timer
);
931 thread_add_timer(pim
->msdp
.master
, pim_msdp_peer_hold_timer_cb
,
932 mp
, PIM_MSDP_PEER_HOLD_TIME
, &mp
->hold_timer
);
937 /* RFC-3618:Sec-5.5 - peer keepalive timer */
938 static int pim_msdp_peer_ka_timer_cb(struct thread
*t
)
940 struct pim_msdp_peer
*mp
;
944 if (PIM_DEBUG_MSDP_EVENTS
) {
945 pim_msdp_peer_timer_expiry_log(mp
, "ka");
948 pim_msdp_pkt_ka_tx(mp
);
949 pim_msdp_peer_ka_timer_setup(mp
, true /* start */);
952 static void pim_msdp_peer_ka_timer_setup(struct pim_msdp_peer
*mp
, bool start
)
954 THREAD_OFF(mp
->ka_timer
);
956 thread_add_timer(mp
->pim
->msdp
.master
,
957 pim_msdp_peer_ka_timer_cb
, mp
,
958 PIM_MSDP_PEER_KA_TIME
, &mp
->ka_timer
);
962 static void pim_msdp_peer_active_connect(struct pim_msdp_peer
*mp
)
966 rc
= pim_msdp_sock_connect(mp
);
968 if (PIM_DEBUG_MSDP_INTERNAL
) {
969 zlog_debug("MSDP peer %s pim_msdp_peer_active_connect: %d",
976 /* connect failed restart the connect-retry timer */
977 pim_msdp_peer_cr_timer_setup(mp
, true /* start */);
980 case connect_success
:
981 /* connect was sucessful move to established */
982 pim_msdp_peer_established(mp
);
985 case connect_in_progress
:
986 /* for NB content we need to wait till sock is readable or
988 PIM_MSDP_PEER_WRITE_ON(mp
);
989 PIM_MSDP_PEER_READ_ON(mp
);
990 /* also restart connect-retry timer to reset the socket if
993 pim_msdp_peer_cr_timer_setup(mp
, true /* start */);
998 /* RFC-3618:Sec-5.6 - connection retry on active peer */
999 static int pim_msdp_peer_cr_timer_cb(struct thread
*t
)
1001 struct pim_msdp_peer
*mp
;
1005 if (PIM_DEBUG_MSDP_EVENTS
) {
1006 pim_msdp_peer_timer_expiry_log(mp
, "connect-retry");
1009 if (mp
->state
!= PIM_MSDP_CONNECTING
|| PIM_MSDP_PEER_IS_LISTENER(mp
)) {
1013 pim_msdp_peer_active_connect(mp
);
1016 static void pim_msdp_peer_cr_timer_setup(struct pim_msdp_peer
*mp
, bool start
)
1018 THREAD_OFF(mp
->cr_timer
);
1021 mp
->pim
->msdp
.master
, pim_msdp_peer_cr_timer_cb
, mp
,
1022 PIM_MSDP_PEER_CONNECT_RETRY_TIME
, &mp
->cr_timer
);
1026 /* if a valid packet is rxed from the peer we can restart hold timer */
1027 void pim_msdp_peer_pkt_rxed(struct pim_msdp_peer
*mp
)
1029 if (mp
->state
== PIM_MSDP_ESTABLISHED
) {
1030 pim_msdp_peer_hold_timer_setup(mp
, true /* start */);
1034 /* if a valid packet is txed to the peer we can restart ka timer and avoid
1035 * unnecessary ka noise in the network */
1036 void pim_msdp_peer_pkt_txed(struct pim_msdp_peer
*mp
)
1038 if (mp
->state
== PIM_MSDP_ESTABLISHED
) {
1039 pim_msdp_peer_ka_timer_setup(mp
, true /* start */);
1040 if (PIM_DEBUG_MSDP_INTERNAL
) {
1041 zlog_debug("MSDP ka timer restart on pkt tx to %s",
1047 static void pim_msdp_addr2su(union sockunion
*su
, struct in_addr addr
)
1050 su
->sin
.sin_addr
= addr
;
1051 su
->sin
.sin_family
= AF_INET
;
1052 #ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN
1053 su
->sin
.sin_len
= sizeof(struct sockaddr_in
);
1054 #endif /* HAVE_STRUCT_SOCKADDR_IN_SIN_LEN */
1057 /* 11.2.A1: create a new peer and transition state to listen or connecting */
1058 static enum pim_msdp_err
pim_msdp_peer_new(struct pim_instance
*pim
,
1059 struct in_addr peer_addr
,
1060 struct in_addr local_addr
,
1061 const char *mesh_group_name
,
1062 struct pim_msdp_peer
**mp_p
)
1064 struct pim_msdp_peer
*mp
;
1066 pim_msdp_enable(pim
);
1068 mp
= XCALLOC(MTYPE_PIM_MSDP_PEER
, sizeof(*mp
));
1071 mp
->peer
= peer_addr
;
1072 pim_inet4_dump("<peer?>", mp
->peer
, mp
->key_str
, sizeof(mp
->key_str
));
1073 pim_msdp_addr2su(&mp
->su_peer
, mp
->peer
);
1074 mp
->local
= local_addr
;
1075 /* XXX: originator_id setting needs to move to the mesh group */
1076 pim
->msdp
.originator_id
= local_addr
;
1077 pim_msdp_addr2su(&mp
->su_local
, mp
->local
);
1078 mp
->mesh_group_name
= XSTRDUP(MTYPE_PIM_MSDP_MG_NAME
, mesh_group_name
);
1079 mp
->state
= PIM_MSDP_INACTIVE
;
1081 strcpy(mp
->last_reset
, "-");
1082 /* higher IP address is listener */
1083 if (ntohl(mp
->local
.s_addr
) > ntohl(mp
->peer
.s_addr
)) {
1084 mp
->flags
|= PIM_MSDP_PEERF_LISTENER
;
1087 /* setup packet buffers */
1088 mp
->ibuf
= stream_new(PIM_MSDP_MAX_PACKET_SIZE
);
1089 mp
->obuf
= stream_fifo_new();
1091 /* insert into misc tables for easy access */
1092 mp
= hash_get(pim
->msdp
.peer_hash
, mp
, hash_alloc_intern
);
1093 listnode_add_sort(pim
->msdp
.peer_list
, mp
);
1095 if (PIM_DEBUG_MSDP_EVENTS
) {
1096 zlog_debug("MSDP peer %s created", mp
->key_str
);
1098 pim_msdp_peer_state_chg_log(mp
);
1101 /* fireup the connect state machine */
1102 if (PIM_MSDP_PEER_IS_LISTENER(mp
)) {
1103 pim_msdp_peer_listen(mp
);
1105 pim_msdp_peer_connect(mp
);
1110 return PIM_MSDP_ERR_NONE
;
1113 struct pim_msdp_peer
*pim_msdp_peer_find(struct pim_instance
*pim
,
1114 struct in_addr peer_addr
)
1116 struct pim_msdp_peer lookup
;
1118 lookup
.peer
= peer_addr
;
1119 return hash_lookup(pim
->msdp
.peer_hash
, &lookup
);
1122 /* add peer configuration if it doesn't already exist */
1123 enum pim_msdp_err
pim_msdp_peer_add(struct pim_instance
*pim
,
1124 struct in_addr peer_addr
,
1125 struct in_addr local_addr
,
1126 const char *mesh_group_name
,
1127 struct pim_msdp_peer
**mp_p
)
1129 struct pim_msdp_peer
*mp
;
1135 if (peer_addr
.s_addr
== local_addr
.s_addr
) {
1136 /* skip session setup if config is invalid */
1137 if (PIM_DEBUG_MSDP_EVENTS
) {
1138 char peer_str
[INET_ADDRSTRLEN
];
1140 pim_inet4_dump("<peer?>", peer_addr
, peer_str
,
1142 zlog_debug("%s add skipped as DIP=SIP", peer_str
);
1144 return PIM_MSDP_ERR_SIP_EQ_DIP
;
1147 mp
= pim_msdp_peer_find(pim
, peer_addr
);
1152 return PIM_MSDP_ERR_PEER_EXISTS
;
1155 return pim_msdp_peer_new(pim
, peer_addr
, local_addr
, mesh_group_name
,
1159 /* release all mem associated with a peer */
1160 static void pim_msdp_peer_free(struct pim_msdp_peer
*mp
)
1163 * Let's make sure we are not running when we delete
1164 * the underlying data structure
1166 pim_msdp_peer_stop_tcp_conn(mp
, false);
1169 stream_free(mp
->ibuf
);
1173 stream_fifo_free(mp
->obuf
);
1176 if (mp
->mesh_group_name
) {
1177 XFREE(MTYPE_PIM_MSDP_MG_NAME
, mp
->mesh_group_name
);
1181 XFREE(MTYPE_PIM_MSDP_PEER
, mp
);
1184 /* delete the peer config */
1185 static enum pim_msdp_err
pim_msdp_peer_do_del(struct pim_msdp_peer
*mp
)
1187 /* stop the tcp connection and shutdown all timers */
1188 pim_msdp_peer_stop_tcp_conn(mp
, true /* chg_state */);
1190 /* remove the session from various tables */
1191 listnode_delete(mp
->pim
->msdp
.peer_list
, mp
);
1192 hash_release(mp
->pim
->msdp
.peer_hash
, mp
);
1194 if (PIM_DEBUG_MSDP_EVENTS
) {
1195 zlog_debug("MSDP peer %s deleted", mp
->key_str
);
1198 /* free up any associated memory */
1199 pim_msdp_peer_free(mp
);
1201 return PIM_MSDP_ERR_NONE
;
1204 enum pim_msdp_err
pim_msdp_peer_del(struct pim_instance
*pim
,
1205 struct in_addr peer_addr
)
1207 struct pim_msdp_peer
*mp
;
1209 mp
= pim_msdp_peer_find(pim
, peer_addr
);
1211 return PIM_MSDP_ERR_NO_PEER
;
1214 return pim_msdp_peer_do_del(mp
);
1217 /* peer hash and peer list helpers */
1218 static unsigned int pim_msdp_peer_hash_key_make(void *p
)
1220 struct pim_msdp_peer
*mp
= p
;
1221 return (jhash_1word(mp
->peer
.s_addr
, 0));
1224 static bool pim_msdp_peer_hash_eq(const void *p1
, const void *p2
)
1226 const struct pim_msdp_peer
*mp1
= p1
;
1227 const struct pim_msdp_peer
*mp2
= p2
;
1229 return (mp1
->peer
.s_addr
== mp2
->peer
.s_addr
);
1232 static int pim_msdp_peer_comp(const void *p1
, const void *p2
)
1234 const struct pim_msdp_peer
*mp1
= p1
;
1235 const struct pim_msdp_peer
*mp2
= p2
;
1237 if (ntohl(mp1
->peer
.s_addr
) < ntohl(mp2
->peer
.s_addr
))
1240 if (ntohl(mp1
->peer
.s_addr
) > ntohl(mp2
->peer
.s_addr
))
1246 /************************** Mesh group management **************************/
1247 static void pim_msdp_mg_free(struct pim_instance
*pim
)
1249 struct pim_msdp_mg
*mg
= pim
->msdp
.mg
;
1251 /* If the mesh-group has valid member or src_ip don't delete it */
1252 if (!mg
|| mg
->mbr_cnt
|| (mg
->src_ip
.s_addr
!= INADDR_ANY
)) {
1256 if (PIM_DEBUG_MSDP_EVENTS
) {
1257 zlog_debug("MSDP mesh-group %s deleted", mg
->mesh_group_name
);
1259 XFREE(MTYPE_PIM_MSDP_MG_NAME
, mg
->mesh_group_name
);
1262 list_delete(&mg
->mbr_list
);
1264 XFREE(MTYPE_PIM_MSDP_MG
, pim
->msdp
.mg
);
1267 static struct pim_msdp_mg
*pim_msdp_mg_new(const char *mesh_group_name
)
1269 struct pim_msdp_mg
*mg
;
1271 mg
= XCALLOC(MTYPE_PIM_MSDP_MG
, sizeof(*mg
));
1273 mg
->mesh_group_name
= XSTRDUP(MTYPE_PIM_MSDP_MG_NAME
, mesh_group_name
);
1274 mg
->mbr_list
= list_new();
1275 mg
->mbr_list
->del
= (void (*)(void *))pim_msdp_mg_mbr_free
;
1276 mg
->mbr_list
->cmp
= (int (*)(void *, void *))pim_msdp_mg_mbr_comp
;
1278 if (PIM_DEBUG_MSDP_EVENTS
) {
1279 zlog_debug("MSDP mesh-group %s created", mg
->mesh_group_name
);
1284 enum pim_msdp_err
pim_msdp_mg_del(struct pim_instance
*pim
,
1285 const char *mesh_group_name
)
1287 struct pim_msdp_mg
*mg
= pim
->msdp
.mg
;
1288 struct pim_msdp_mg_mbr
*mbr
;
1290 if (!mg
|| strcmp(mg
->mesh_group_name
, mesh_group_name
)) {
1291 return PIM_MSDP_ERR_NO_MG
;
1294 /* delete all the mesh-group members */
1295 while (!list_isempty(mg
->mbr_list
)) {
1296 mbr
= listnode_head(mg
->mbr_list
);
1297 pim_msdp_mg_mbr_do_del(mg
, mbr
);
1301 mg
->src_ip
.s_addr
= INADDR_ANY
;
1303 /* free up the mesh-group */
1304 pim_msdp_mg_free(pim
);
1305 return PIM_MSDP_ERR_NONE
;
1308 static enum pim_msdp_err
pim_msdp_mg_add(struct pim_instance
*pim
,
1309 const char *mesh_group_name
)
1312 if (!strcmp(pim
->msdp
.mg
->mesh_group_name
, mesh_group_name
)) {
1313 return PIM_MSDP_ERR_NONE
;
1315 /* currently only one mesh-group can exist at a time */
1316 return PIM_MSDP_ERR_MAX_MESH_GROUPS
;
1319 pim
->msdp
.mg
= pim_msdp_mg_new(mesh_group_name
);
1320 if (!pim
->msdp
.mg
) {
1321 return PIM_MSDP_ERR_OOM
;
1324 return PIM_MSDP_ERR_NONE
;
1327 static int pim_msdp_mg_mbr_comp(const void *p1
, const void *p2
)
1329 const struct pim_msdp_mg_mbr
*mbr1
= p1
;
1330 const struct pim_msdp_mg_mbr
*mbr2
= p2
;
1332 if (ntohl(mbr1
->mbr_ip
.s_addr
) < ntohl(mbr2
->mbr_ip
.s_addr
))
1335 if (ntohl(mbr1
->mbr_ip
.s_addr
) > ntohl(mbr2
->mbr_ip
.s_addr
))
1341 static void pim_msdp_mg_mbr_free(struct pim_msdp_mg_mbr
*mbr
)
1343 XFREE(MTYPE_PIM_MSDP_MG_MBR
, mbr
);
1346 static struct pim_msdp_mg_mbr
*pim_msdp_mg_mbr_find(struct pim_instance
*pim
,
1347 struct in_addr mbr_ip
)
1349 struct pim_msdp_mg_mbr
*mbr
;
1350 struct listnode
*mbr_node
;
1352 if (!pim
->msdp
.mg
) {
1355 /* we can move this to a hash but considering that number of peers in
1356 * a mesh-group that seems like bit of an overkill */
1357 for (ALL_LIST_ELEMENTS_RO(pim
->msdp
.mg
->mbr_list
, mbr_node
, mbr
)) {
1358 if (mbr
->mbr_ip
.s_addr
== mbr_ip
.s_addr
) {
1365 enum pim_msdp_err
pim_msdp_mg_mbr_add(struct pim_instance
*pim
,
1366 const char *mesh_group_name
,
1367 struct in_addr mbr_ip
)
1370 struct pim_msdp_mg_mbr
*mbr
;
1371 struct pim_msdp_mg
*mg
;
1373 rc
= pim_msdp_mg_add(pim
, mesh_group_name
);
1374 if (rc
!= PIM_MSDP_ERR_NONE
) {
1379 mbr
= pim_msdp_mg_mbr_find(pim
, mbr_ip
);
1381 return PIM_MSDP_ERR_MG_MBR_EXISTS
;
1384 mbr
= XCALLOC(MTYPE_PIM_MSDP_MG_MBR
, sizeof(*mbr
));
1385 mbr
->mbr_ip
= mbr_ip
;
1386 listnode_add_sort(mg
->mbr_list
, mbr
);
1388 /* if valid SIP has been configured add peer session */
1389 if (mg
->src_ip
.s_addr
!= INADDR_ANY
) {
1390 pim_msdp_peer_add(pim
, mbr_ip
, mg
->src_ip
, mesh_group_name
,
1394 if (PIM_DEBUG_MSDP_EVENTS
) {
1395 char ip_str
[INET_ADDRSTRLEN
];
1396 pim_inet4_dump("<mbr?>", mbr
->mbr_ip
, ip_str
, sizeof(ip_str
));
1397 zlog_debug("MSDP mesh-group %s mbr %s created",
1398 mg
->mesh_group_name
, ip_str
);
1401 return PIM_MSDP_ERR_NONE
;
1404 static void pim_msdp_mg_mbr_do_del(struct pim_msdp_mg
*mg
,
1405 struct pim_msdp_mg_mbr
*mbr
)
1407 /* Delete active peer session if any */
1409 pim_msdp_peer_do_del(mbr
->mp
);
1412 listnode_delete(mg
->mbr_list
, mbr
);
1413 if (PIM_DEBUG_MSDP_EVENTS
) {
1414 char ip_str
[INET_ADDRSTRLEN
];
1415 pim_inet4_dump("<mbr?>", mbr
->mbr_ip
, ip_str
, sizeof(ip_str
));
1416 zlog_debug("MSDP mesh-group %s mbr %s deleted",
1417 mg
->mesh_group_name
, ip_str
);
1419 pim_msdp_mg_mbr_free(mbr
);
1425 enum pim_msdp_err
pim_msdp_mg_mbr_del(struct pim_instance
*pim
,
1426 const char *mesh_group_name
,
1427 struct in_addr mbr_ip
)
1429 struct pim_msdp_mg_mbr
*mbr
;
1430 struct pim_msdp_mg
*mg
= pim
->msdp
.mg
;
1432 if (!mg
|| strcmp(mg
->mesh_group_name
, mesh_group_name
)) {
1433 return PIM_MSDP_ERR_NO_MG
;
1436 mbr
= pim_msdp_mg_mbr_find(pim
, mbr_ip
);
1438 return PIM_MSDP_ERR_NO_MG_MBR
;
1441 pim_msdp_mg_mbr_do_del(mg
, mbr
);
1442 /* if there are no references to the mg free it */
1443 pim_msdp_mg_free(pim
);
1445 return PIM_MSDP_ERR_NONE
;
1448 static void pim_msdp_mg_src_do_del(struct pim_instance
*pim
)
1450 struct pim_msdp_mg_mbr
*mbr
;
1451 struct listnode
*mbr_node
;
1452 struct pim_msdp_mg
*mg
= pim
->msdp
.mg
;
1454 /* SIP is being removed - tear down all active peer sessions */
1455 for (ALL_LIST_ELEMENTS_RO(mg
->mbr_list
, mbr_node
, mbr
)) {
1457 pim_msdp_peer_do_del(mbr
->mp
);
1461 if (PIM_DEBUG_MSDP_EVENTS
) {
1462 zlog_debug("MSDP mesh-group %s src cleared",
1463 mg
->mesh_group_name
);
1467 enum pim_msdp_err
pim_msdp_mg_src_del(struct pim_instance
*pim
,
1468 const char *mesh_group_name
)
1470 struct pim_msdp_mg
*mg
= pim
->msdp
.mg
;
1472 if (!mg
|| strcmp(mg
->mesh_group_name
, mesh_group_name
)) {
1473 return PIM_MSDP_ERR_NO_MG
;
1476 if (mg
->src_ip
.s_addr
!= INADDR_ANY
) {
1477 mg
->src_ip
.s_addr
= INADDR_ANY
;
1478 pim_msdp_mg_src_do_del(pim
);
1479 /* if there are no references to the mg free it */
1480 pim_msdp_mg_free(pim
);
1482 return PIM_MSDP_ERR_NONE
;
1485 enum pim_msdp_err
pim_msdp_mg_src_add(struct pim_instance
*pim
,
1486 const char *mesh_group_name
,
1487 struct in_addr src_ip
)
1490 struct pim_msdp_mg_mbr
*mbr
;
1491 struct listnode
*mbr_node
;
1492 struct pim_msdp_mg
*mg
;
1494 if (src_ip
.s_addr
== INADDR_ANY
) {
1495 pim_msdp_mg_src_del(pim
, mesh_group_name
);
1496 return PIM_MSDP_ERR_NONE
;
1499 rc
= pim_msdp_mg_add(pim
, mesh_group_name
);
1500 if (rc
!= PIM_MSDP_ERR_NONE
) {
1505 if (mg
->src_ip
.s_addr
!= INADDR_ANY
) {
1506 pim_msdp_mg_src_do_del(pim
);
1508 mg
->src_ip
= src_ip
;
1510 for (ALL_LIST_ELEMENTS_RO(mg
->mbr_list
, mbr_node
, mbr
)) {
1511 pim_msdp_peer_add(pim
, mbr
->mbr_ip
, mg
->src_ip
, mesh_group_name
,
1515 if (PIM_DEBUG_MSDP_EVENTS
) {
1516 char ip_str
[INET_ADDRSTRLEN
];
1517 pim_inet4_dump("<src?>", mg
->src_ip
, ip_str
, sizeof(ip_str
));
1518 zlog_debug("MSDP mesh-group %s src %s set", mg
->mesh_group_name
,
1521 return PIM_MSDP_ERR_NONE
;
1524 /*********************** MSDP feature APIs *********************************/
1525 int pim_msdp_config_write(struct pim_instance
*pim
, struct vty
*vty
,
1528 struct listnode
*mbrnode
;
1529 struct pim_msdp_mg_mbr
*mbr
;
1530 struct pim_msdp_mg
*mg
= pim
->msdp
.mg
;
1531 char mbr_str
[INET_ADDRSTRLEN
];
1532 char src_str
[INET_ADDRSTRLEN
];
1539 if (mg
->src_ip
.s_addr
!= INADDR_ANY
) {
1540 pim_inet4_dump("<src?>", mg
->src_ip
, src_str
, sizeof(src_str
));
1541 vty_out(vty
, "%sip msdp mesh-group %s source %s\n", spaces
,
1542 mg
->mesh_group_name
, src_str
);
1546 for (ALL_LIST_ELEMENTS_RO(mg
->mbr_list
, mbrnode
, mbr
)) {
1547 pim_inet4_dump("<mbr?>", mbr
->mbr_ip
, mbr_str
, sizeof(mbr_str
));
1548 vty_out(vty
, "%sip msdp mesh-group %s member %s\n", spaces
,
1549 mg
->mesh_group_name
, mbr_str
);
1555 /* Enable feature including active/periodic timers etc. on the first peer
1556 * config. Till then MSDP should just stay quiet. */
1557 static void pim_msdp_enable(struct pim_instance
*pim
)
1559 if (pim
->msdp
.flags
& PIM_MSDPF_ENABLE
) {
1560 /* feature is already enabled */
1563 pim
->msdp
.flags
|= PIM_MSDPF_ENABLE
;
1564 pim
->msdp
.work_obuf
= stream_new(PIM_MSDP_MAX_PACKET_SIZE
);
1565 pim_msdp_sa_adv_timer_setup(pim
, true /* start */);
1566 /* setup sa cache based on local sources */
1567 pim_msdp_sa_local_setup(pim
);
1571 void pim_msdp_init(struct pim_instance
*pim
, struct thread_master
*master
)
1573 pim
->msdp
.master
= master
;
1576 snprintf(hash_name
, 64, "PIM %s MSDP Peer Hash", pim
->vrf
->name
);
1577 pim
->msdp
.peer_hash
= hash_create(pim_msdp_peer_hash_key_make
,
1578 pim_msdp_peer_hash_eq
, hash_name
);
1579 pim
->msdp
.peer_list
= list_new();
1580 pim
->msdp
.peer_list
->del
= (void (*)(void *))pim_msdp_peer_free
;
1581 pim
->msdp
.peer_list
->cmp
= (int (*)(void *, void *))pim_msdp_peer_comp
;
1583 snprintf(hash_name
, 64, "PIM %s MSDP SA Hash", pim
->vrf
->name
);
1584 pim
->msdp
.sa_hash
= hash_create(pim_msdp_sa_hash_key_make
,
1585 pim_msdp_sa_hash_eq
, hash_name
);
1586 pim
->msdp
.sa_list
= list_new();
1587 pim
->msdp
.sa_list
->del
= (void (*)(void *))pim_msdp_sa_free
;
1588 pim
->msdp
.sa_list
->cmp
= (int (*)(void *, void *))pim_msdp_sa_comp
;
1591 /* counterpart to MSDP init; XXX: unused currently */
1592 void pim_msdp_exit(struct pim_instance
*pim
)
1594 pim_msdp_sa_adv_timer_setup(pim
, false);
1596 /* XXX: stop listener and delete all peer sessions */
1598 pim_msdp_mg_free(pim
);
1600 if (pim
->msdp
.peer_hash
) {
1601 hash_clean(pim
->msdp
.peer_hash
, NULL
);
1602 hash_free(pim
->msdp
.peer_hash
);
1603 pim
->msdp
.peer_hash
= NULL
;
1606 if (pim
->msdp
.peer_list
) {
1607 list_delete(&pim
->msdp
.peer_list
);
1610 if (pim
->msdp
.sa_hash
) {
1611 hash_clean(pim
->msdp
.sa_hash
, NULL
);
1612 hash_free(pim
->msdp
.sa_hash
);
1613 pim
->msdp
.sa_hash
= NULL
;
1616 if (pim
->msdp
.sa_list
) {
1617 list_delete(&pim
->msdp
.sa_list
);
1620 if (pim
->msdp
.work_obuf
)
1621 stream_free(pim
->msdp
.work_obuf
);
1622 pim
->msdp
.work_obuf
= NULL
;