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>
34 #include "pim_memory.h"
35 #include "pim_iface.h"
39 #include "pim_upstream.h"
42 #include "pim_msdp_packet.h"
43 #include "pim_msdp_socket.h"
45 struct pim_msdp pim_msdp
, *msdp
= &pim_msdp
;
47 static void pim_msdp_peer_listen(struct pim_msdp_peer
*mp
);
48 static void pim_msdp_peer_cr_timer_setup(struct pim_msdp_peer
*mp
, bool start
);
49 static void pim_msdp_peer_ka_timer_setup(struct pim_msdp_peer
*mp
, bool start
);
50 static void pim_msdp_peer_hold_timer_setup(struct pim_msdp_peer
*mp
, bool start
);
51 static void pim_msdp_peer_free(struct pim_msdp_peer
*mp
);
52 static void pim_msdp_enable(void);
53 static void pim_msdp_sa_adv_timer_setup(bool start
);
54 static void pim_msdp_sa_deref(struct pim_msdp_sa
*sa
, enum pim_msdp_sa_flags flags
);
55 static int pim_msdp_mg_mbr_comp(const void *p1
, const void *p2
);
56 static void pim_msdp_mg_mbr_free(struct pim_msdp_mg_mbr
*mbr
);
57 static void pim_msdp_mg_mbr_do_del(struct pim_msdp_mg
*mg
, struct pim_msdp_mg_mbr
*mbr
);
59 /************************ SA cache management ******************************/
61 pim_msdp_sa_timer_expiry_log(struct pim_msdp_sa
*sa
, const char *timer_str
)
63 zlog_debug("MSDP SA %s %s timer expired", sa
->sg_str
, timer_str
);
66 /* RFC-3618:Sec-5.1 - global active source advertisement timer */
68 pim_msdp_sa_adv_timer_cb(struct thread
*t
)
70 if (PIM_DEBUG_MSDP_EVENTS
) {
71 zlog_debug("MSDP SA advertisment timer expired");
74 pim_msdp_sa_adv_timer_setup(true /* start */);
79 pim_msdp_sa_adv_timer_setup(bool start
)
81 THREAD_OFF(msdp
->sa_adv_timer
);
83 thread_add_timer(msdp
->master
, pim_msdp_sa_adv_timer_cb
, NULL
,
84 PIM_MSDP_SA_ADVERTISMENT_TIME
, &msdp
->sa_adv_timer
);
88 /* RFC-3618:Sec-5.3 - SA cache state timer */
90 pim_msdp_sa_state_timer_cb(struct thread
*t
)
92 struct pim_msdp_sa
*sa
;
96 if (PIM_DEBUG_MSDP_EVENTS
) {
97 pim_msdp_sa_timer_expiry_log(sa
, "state");
100 pim_msdp_sa_deref(sa
, PIM_MSDP_SAF_PEER
);
104 pim_msdp_sa_state_timer_setup(struct pim_msdp_sa
*sa
, bool start
)
106 THREAD_OFF(sa
->sa_state_timer
);
108 thread_add_timer(msdp
->master
, pim_msdp_sa_state_timer_cb
, sa
,
109 PIM_MSDP_SA_HOLD_TIME
, &sa
->sa_state_timer
);
114 pim_msdp_sa_upstream_del(struct pim_msdp_sa
*sa
)
116 struct pim_upstream
*up
= sa
->up
;
122 if (PIM_UPSTREAM_FLAG_TEST_SRC_MSDP(up
->flags
)) {
123 PIM_UPSTREAM_FLAG_UNSET_SRC_MSDP(up
->flags
);
124 sa
->flags
|= PIM_MSDP_SAF_UP_DEL_IN_PROG
;
125 pim_upstream_del(up
, __PRETTY_FUNCTION__
);
126 sa
->flags
&= ~PIM_MSDP_SAF_UP_DEL_IN_PROG
;
129 if (PIM_DEBUG_MSDP_EVENTS
) {
130 zlog_debug("MSDP SA %s de-referenced SPT", sa
->sg_str
);
135 pim_msdp_sa_upstream_add_ok(struct pim_msdp_sa
*sa
, struct pim_upstream
*xg_up
)
137 if (!(sa
->flags
& PIM_MSDP_SAF_PEER
)) {
138 /* SA should have been rxed from a peer */
141 /* check if we are RP */
142 if (!I_am_RP(sa
->sg
.grp
)) {
146 /* check if we have a (*, G) with a non-empty immediate OIL */
150 memset(&sg
, 0, sizeof(sg
));
153 xg_up
= pim_upstream_find(&sg
);
155 if (!xg_up
|| (xg_up
->join_state
!= PIM_UPSTREAM_JOINED
)) {
156 /* join desired will be true for such (*, G) entries so we will
157 * just look at join_state and let the PIM state machine do the rest of
165 /* Upstream add evaluation needs to happen everytime -
166 * 1. Peer reference is added or removed.
167 * 2. The RP for a group changes.
168 * 3. joinDesired for the associated (*, G) changes
169 * 4. associated (*, G) is removed - this seems like a bit redundant
170 * (considering #4); but just in case an entry gets nuked without
171 * upstream state transition
174 pim_msdp_sa_upstream_update(struct pim_msdp_sa
*sa
,
175 struct pim_upstream
*xg_up
, const char *ctx
)
177 struct pim_upstream
*up
;
179 if (!pim_msdp_sa_upstream_add_ok(sa
, xg_up
)) {
180 pim_msdp_sa_upstream_del(sa
);
189 up
= pim_upstream_find(&sa
->sg
);
190 if (up
&& (PIM_UPSTREAM_FLAG_TEST_SRC_MSDP(up
->flags
))) {
191 /* somehow we lost track of the upstream ptr? best log it */
193 if (PIM_DEBUG_MSDP_EVENTS
) {
194 zlog_debug("MSDP SA %s SPT reference missing", sa
->sg_str
);
199 /* RFC3618: "RP triggers a (S, G) join event towards the data source
200 * as if a JP message was rxed addressed to the RP itself." */
201 up
= pim_upstream_add(&sa
->sg
, NULL
/* iif */,
202 PIM_UPSTREAM_FLAG_MASK_SRC_MSDP
,
203 __PRETTY_FUNCTION__
);
207 /* update inherited oil */
208 pim_upstream_inherited_olist(up
);
209 /* should we also start the kat in parallel? we will need it when the
211 if (PIM_DEBUG_MSDP_EVENTS
) {
212 zlog_debug("MSDP SA %s referenced SPT", sa
->sg_str
);
215 if (PIM_DEBUG_MSDP_EVENTS
) {
216 zlog_debug("MSDP SA %s SPT reference failed", sa
->sg_str
);
221 /* release all mem associated with a sa */
223 pim_msdp_sa_free(struct pim_msdp_sa
*sa
)
225 XFREE(MTYPE_PIM_MSDP_SA
, sa
);
228 static struct pim_msdp_sa
*
229 pim_msdp_sa_new(struct prefix_sg
*sg
, struct in_addr rp
)
231 struct pim_msdp_sa
*sa
;
233 sa
= XCALLOC(MTYPE_PIM_MSDP_SA
, sizeof(*sa
));
235 zlog_err("%s: PIM XCALLOC(%zu) failure",
236 __PRETTY_FUNCTION__
, sizeof(*sa
));
241 pim_str_sg_set(sg
, sa
->sg_str
);
243 sa
->uptime
= pim_time_monotonic_sec();
245 /* insert into misc tables for easy access */
246 sa
= hash_get(msdp
->sa_hash
, sa
, hash_alloc_intern
);
248 zlog_err("%s: PIM hash get failure", __PRETTY_FUNCTION__
);
249 pim_msdp_sa_free(sa
);
252 listnode_add_sort(msdp
->sa_list
, sa
);
254 if (PIM_DEBUG_MSDP_EVENTS
) {
255 zlog_debug("MSDP SA %s created", sa
->sg_str
);
261 static struct pim_msdp_sa
*
262 pim_msdp_sa_find(struct prefix_sg
*sg
)
264 struct pim_msdp_sa lookup
;
267 return hash_lookup(msdp
->sa_hash
, &lookup
);
270 static struct pim_msdp_sa
*
271 pim_msdp_sa_add(struct prefix_sg
*sg
, struct in_addr rp
)
273 struct pim_msdp_sa
*sa
;
275 sa
= pim_msdp_sa_find(sg
);
280 return pim_msdp_sa_new(sg
, rp
);
284 pim_msdp_sa_del(struct pim_msdp_sa
* sa
)
286 /* this is somewhat redundant - still want to be careful not to leave
287 * stale upstream references */
288 pim_msdp_sa_upstream_del(sa
);
291 pim_msdp_sa_state_timer_setup(sa
, false /* start */);
293 /* remove the entry from various tables */
294 listnode_delete(msdp
->sa_list
, sa
);
295 hash_release(msdp
->sa_hash
, sa
);
297 if (PIM_DEBUG_MSDP_EVENTS
) {
298 zlog_debug("MSDP SA %s deleted", sa
->sg_str
);
301 /* free up any associated memory */
302 pim_msdp_sa_free(sa
);
306 pim_msdp_sa_peer_ip_set(struct pim_msdp_sa
*sa
, struct pim_msdp_peer
*mp
, struct in_addr rp
)
308 struct pim_msdp_peer
*old_mp
;
310 /* optimize the "no change" case as it will happen
311 * frequently/periodically */
312 if (mp
&& (sa
->peer
.s_addr
== mp
->peer
.s_addr
)) {
316 /* any time the peer ip changes also update the rp address */
317 if (PIM_INADDR_ISNOT_ANY(sa
->peer
)) {
318 old_mp
= pim_msdp_peer_find(sa
->peer
);
319 if (old_mp
&& old_mp
->sa_cnt
) {
328 sa
->peer
.s_addr
= PIM_NET_INADDR_ANY
;
333 /* When a local active-source is removed there is no way to withdraw the
334 * source from peers. We will simply remove it from the SA cache so it will
335 * not be sent in supsequent SA updates. Peers will consequently timeout the
337 * Similarly a "peer-added" SA is never explicitly deleted. It is simply
338 * aged out overtime if not seen in the SA updates from the peers.
339 * XXX: should we provide a knob to drop entries learnt from a peer when the
342 pim_msdp_sa_deref(struct pim_msdp_sa
*sa
, enum pim_msdp_sa_flags flags
)
344 bool update_up
= false;
346 if ((sa
->flags
&PIM_MSDP_SAF_LOCAL
)) {
347 if (flags
& PIM_MSDP_SAF_LOCAL
) {
348 if (PIM_DEBUG_MSDP_EVENTS
) {
349 zlog_debug("MSDP SA %s local reference removed", sa
->sg_str
);
356 if ((sa
->flags
&PIM_MSDP_SAF_PEER
)) {
357 if (flags
& PIM_MSDP_SAF_PEER
) {
360 if (PIM_DEBUG_MSDP_EVENTS
) {
361 zlog_debug("MSDP SA %s peer reference removed", sa
->sg_str
);
363 pim_msdp_sa_state_timer_setup(sa
, false /* start */);
364 rp
.s_addr
= INADDR_ANY
;
365 pim_msdp_sa_peer_ip_set(sa
, NULL
/* mp */, rp
);
366 /* if peer ref was removed we need to remove the msdp reference on the
374 pim_msdp_sa_upstream_update(sa
, NULL
/* xg_up */, "sa-deref");
377 if (!(sa
->flags
& PIM_MSDP_SAF_REF
)) {
383 pim_msdp_sa_ref(struct pim_msdp_peer
*mp
, struct prefix_sg
*sg
,
386 struct pim_msdp_sa
*sa
;
388 sa
= pim_msdp_sa_add(sg
, rp
);
395 if (!(sa
->flags
& PIM_MSDP_SAF_PEER
)) {
396 sa
->flags
|= PIM_MSDP_SAF_PEER
;
397 if (PIM_DEBUG_MSDP_EVENTS
) {
398 zlog_debug("MSDP SA %s added by peer", sa
->sg_str
);
401 pim_msdp_sa_peer_ip_set(sa
, mp
, rp
);
402 /* start/re-start the state timer to prevent cache expiry */
403 pim_msdp_sa_state_timer_setup(sa
, true /* start */);
404 /* We re-evaluate SA "SPT-trigger" everytime we hear abt it from a
405 * peer. XXX: If this becomes too much of a periodic overhead we
406 * can make it event based */
407 pim_msdp_sa_upstream_update(sa
, NULL
/* xg_up */, "peer-ref");
409 if (!(sa
->flags
& PIM_MSDP_SAF_LOCAL
)) {
410 sa
->flags
|= PIM_MSDP_SAF_LOCAL
;
412 if (PIM_DEBUG_MSDP_EVENTS
) {
413 zlog_debug("MSDP SA %s added locally", sa
->sg_str
);
415 /* send an immediate SA update to peers */
416 pim_msdp_pkt_sa_tx_one(sa
);
418 sa
->flags
&= ~PIM_MSDP_SAF_STALE
;
422 /* The following criteria must be met to originate an SA from the MSDP
424 * 1. KAT must be running i.e. source is active.
425 * 2. We must be RP for the group.
426 * 3. Source must be registrable to the RP (this is where the RFC is vague
427 * and especially ambiguous in CLOS networks; with anycast RP all sources
428 * are potentially registrable to all RPs in the domain). We assume #3 is
430 * a. We are also the FHR-DR for the source (OR)
431 * b. We rxed a pim register (null or data encapsulated) within the last
432 * (3 * (1.5 * register_suppression_timer))).
435 pim_msdp_sa_local_add_ok(struct pim_upstream
*up
)
437 if (!(msdp
->flags
& PIM_MSDPF_ENABLE
)) {
441 if (!up
->t_ka_timer
) {
442 /* stream is not active */
446 if (!I_am_RP(up
->sg
.grp
)) {
447 /* we are not RP for the group */
451 /* we are the FHR-DR for this stream or we are RP and have seen registers
452 * from a FHR for this source */
453 if (PIM_UPSTREAM_FLAG_TEST_FHR(up
->flags
) || up
->t_msdp_reg_timer
) {
461 pim_msdp_sa_local_add(struct prefix_sg
*sg
)
465 pim_msdp_sa_ref(NULL
/* mp */, sg
, rp
);
469 pim_msdp_sa_local_del(struct prefix_sg
*sg
)
471 struct pim_msdp_sa
*sa
;
473 sa
= pim_msdp_sa_find(sg
);
475 pim_msdp_sa_deref(sa
, PIM_MSDP_SAF_LOCAL
);
479 /* we need to be very cautious with this API as SA del too can trigger an
480 * upstream del and we will get stuck in a simple loop */
482 pim_msdp_sa_local_del_on_up_del(struct prefix_sg
*sg
)
484 struct pim_msdp_sa
*sa
;
486 sa
= pim_msdp_sa_find(sg
);
488 if (PIM_DEBUG_MSDP_INTERNAL
) {
489 zlog_debug("MSDP local sa %s del on up del", sa
->sg_str
);
492 /* if there is no local reference escape */
493 if (!(sa
->flags
& PIM_MSDP_SAF_LOCAL
)) {
494 if (PIM_DEBUG_MSDP_INTERNAL
) {
495 zlog_debug("MSDP local sa %s del; no local ref", sa
->sg_str
);
500 if (sa
->flags
& PIM_MSDP_SAF_UP_DEL_IN_PROG
) {
501 /* MSDP is the one that triggered the upstream del. if this happens
502 * we most certainly have a bug in the PIM upstream state machine. We
503 * will not have a local reference unless the KAT is running. And if the
504 * KAT is running there MUST be an additional source-stream reference to
505 * the flow. Accounting for such cases requires lot of changes; perhaps
506 * address this in the next release? - XXX */
507 zlog_err("MSDP sa %s SPT teardown is causing the local entry to be removed", sa
->sg_str
);
511 /* we are dropping the sa on upstream del we should not have an
512 * upstream reference */
514 if (PIM_DEBUG_MSDP_INTERNAL
) {
515 zlog_debug("MSDP local sa %s del; up non-NULL", sa
->sg_str
);
519 pim_msdp_sa_deref(sa
, PIM_MSDP_SAF_LOCAL
);
523 /* Local SA qualification needs to be re-evaluated when -
524 * 1. KAT is started or stopped
526 * 3. Whenever FHR status changes for a (S,G) - XXX - currently there
527 * is no clear path to transition an entry out of "MASK_FHR" need
528 * to discuss this with Donald. May result in some strangeness if the
529 * FHR is also the RP.
530 * 4. When msdp_reg timer is started or stopped
533 pim_msdp_sa_local_update(struct pim_upstream
*up
)
535 if (pim_msdp_sa_local_add_ok(up
)) {
536 pim_msdp_sa_local_add(&up
->sg
);
538 pim_msdp_sa_local_del(&up
->sg
);
543 pim_msdp_sa_local_setup(void)
545 struct pim_upstream
*up
;
546 struct listnode
*up_node
;
548 for (ALL_LIST_ELEMENTS_RO(pim_upstream_list
, up_node
, up
)) {
549 pim_msdp_sa_local_update(up
);
553 /* whenever the RP changes we need to re-evaluate the "local" SA-cache */
554 /* XXX: needs to be tested */
556 pim_msdp_i_am_rp_changed(void)
558 struct listnode
*sanode
;
559 struct listnode
*nextnode
;
560 struct pim_msdp_sa
*sa
;
562 if (!(msdp
->flags
& PIM_MSDPF_ENABLE
)) {
563 /* if the feature is not enabled do nothing */
567 if (PIM_DEBUG_MSDP_INTERNAL
) {
568 zlog_debug("MSDP i_am_rp changed");
571 /* mark all local entries as stale */
572 for (ALL_LIST_ELEMENTS_RO(msdp
->sa_list
, sanode
, sa
)) {
573 if (sa
->flags
& PIM_MSDP_SAF_LOCAL
) {
574 sa
->flags
|= PIM_MSDP_SAF_STALE
;
578 /* re-setup local SA entries */
579 pim_msdp_sa_local_setup();
581 for (ALL_LIST_ELEMENTS(msdp
->sa_list
, sanode
, nextnode
, sa
)) {
582 /* purge stale SA entries */
583 if (sa
->flags
& PIM_MSDP_SAF_STALE
) {
584 /* clear the stale flag; the entry may be kept even after
586 sa
->flags
&= ~PIM_MSDP_SAF_STALE
;
587 /* sa_deref can end up freeing the sa; so don't access contents after */
588 pim_msdp_sa_deref(sa
, PIM_MSDP_SAF_LOCAL
);
590 /* if the souce is still active check if we can influence SPT */
591 pim_msdp_sa_upstream_update(sa
, NULL
/* xg_up */, "rp-change");
596 /* We track the join state of (*, G) entries. If G has sources in the SA-cache
597 * we need to setup or teardown SPT when the JoinDesired status changes for
600 pim_msdp_up_join_state_changed(struct pim_upstream
*xg_up
)
602 struct listnode
*sanode
;
603 struct pim_msdp_sa
*sa
;
605 if (PIM_DEBUG_MSDP_INTERNAL
) {
606 zlog_debug("MSDP join state changed for %s", xg_up
->sg_str
);
609 /* If this is not really an XG entry just move on */
610 if ((xg_up
->sg
.src
.s_addr
!= INADDR_ANY
) ||
611 (xg_up
->sg
.grp
.s_addr
== INADDR_ANY
)) {
615 /* XXX: Need to maintain SAs per-group to avoid all this unnecessary
617 for (ALL_LIST_ELEMENTS_RO(msdp
->sa_list
, sanode
, sa
)) {
618 if (sa
->sg
.grp
.s_addr
!= xg_up
->sg
.grp
.s_addr
) {
621 pim_msdp_sa_upstream_update(sa
, xg_up
, "up-jp-change");
626 pim_msdp_up_xg_del(struct prefix_sg
*sg
)
628 struct listnode
*sanode
;
629 struct pim_msdp_sa
*sa
;
631 if (PIM_DEBUG_MSDP_INTERNAL
) {
632 zlog_debug("MSDP %s del", pim_str_sg_dump(sg
));
635 /* If this is not really an XG entry just move on */
636 if ((sg
->src
.s_addr
!= INADDR_ANY
) ||
637 (sg
->grp
.s_addr
== INADDR_ANY
)) {
641 /* XXX: Need to maintain SAs per-group to avoid all this unnecessary
643 for (ALL_LIST_ELEMENTS_RO(msdp
->sa_list
, sanode
, sa
)) {
644 if (sa
->sg
.grp
.s_addr
!= sg
->grp
.s_addr
) {
647 pim_msdp_sa_upstream_update(sa
, NULL
/* xg */, "up-jp-change");
652 pim_msdp_up_del(struct prefix_sg
*sg
)
654 if (PIM_DEBUG_MSDP_INTERNAL
) {
655 zlog_debug("MSDP up %s del", pim_str_sg_dump(sg
));
657 if (sg
->src
.s_addr
== INADDR_ANY
) {
658 pim_msdp_up_xg_del(sg
);
660 pim_msdp_sa_local_del_on_up_del(sg
);
664 /* sa hash and peer list helpers */
666 pim_msdp_sa_hash_key_make(void *p
)
668 struct pim_msdp_sa
*sa
= p
;
670 return (jhash_2words(sa
->sg
.src
.s_addr
, sa
->sg
.grp
.s_addr
, 0));
674 pim_msdp_sa_hash_eq(const void *p1
, const void *p2
)
676 const struct pim_msdp_sa
*sa1
= p1
;
677 const struct pim_msdp_sa
*sa2
= p2
;
679 return ((sa1
->sg
.src
.s_addr
== sa2
->sg
.src
.s_addr
) &&
680 (sa1
->sg
.grp
.s_addr
== sa2
->sg
.grp
.s_addr
));
684 pim_msdp_sa_comp(const void *p1
, const void *p2
)
686 const struct pim_msdp_sa
*sa1
= p1
;
687 const struct pim_msdp_sa
*sa2
= p2
;
689 if (ntohl(sa1
->sg
.grp
.s_addr
) < ntohl(sa2
->sg
.grp
.s_addr
))
692 if (ntohl(sa1
->sg
.grp
.s_addr
) > ntohl(sa2
->sg
.grp
.s_addr
))
695 if (ntohl(sa1
->sg
.src
.s_addr
) < ntohl(sa2
->sg
.src
.s_addr
))
698 if (ntohl(sa1
->sg
.src
.s_addr
) > ntohl(sa2
->sg
.src
.s_addr
))
704 /* RFC-3618:Sec-10.1.3 - Peer-RPF forwarding */
705 /* XXX: this can use a bit of refining and extensions */
707 pim_msdp_peer_rpf_check(struct pim_msdp_peer
*mp
, struct in_addr rp
)
709 if (mp
->peer
.s_addr
== rp
.s_addr
) {
716 /************************ Peer session management **************************/
718 pim_msdp_state_dump(enum pim_msdp_peer_state state
, char *buf
, int buf_size
)
721 case PIM_MSDP_DISABLED
:
722 snprintf(buf
, buf_size
, "%s", "disabled");
724 case PIM_MSDP_INACTIVE
:
725 snprintf(buf
, buf_size
, "%s", "inactive");
727 case PIM_MSDP_LISTEN
:
728 snprintf(buf
, buf_size
, "%s", "listen");
730 case PIM_MSDP_CONNECTING
:
731 snprintf(buf
, buf_size
, "%s", "connecting");
733 case PIM_MSDP_ESTABLISHED
:
734 snprintf(buf
, buf_size
, "%s", "established");
737 snprintf(buf
, buf_size
, "unk-%d", state
);
743 pim_msdp_peer_key_dump(struct pim_msdp_peer
*mp
, char *buf
, int buf_size
, bool long_format
)
745 char peer_str
[INET_ADDRSTRLEN
];
746 char local_str
[INET_ADDRSTRLEN
];
748 pim_inet4_dump("<peer?>", mp
->peer
, peer_str
, sizeof(peer_str
));
750 pim_inet4_dump("<local?>", mp
->local
, local_str
, sizeof(local_str
));
751 snprintf(buf
, buf_size
, "MSDP peer %s local %s mg %s",
752 peer_str
, local_str
, mp
->mesh_group_name
);
754 snprintf(buf
, buf_size
, "MSDP peer %s", peer_str
);
761 pim_msdp_peer_state_chg_log(struct pim_msdp_peer
*mp
)
763 char state_str
[PIM_MSDP_STATE_STRLEN
];
765 pim_msdp_state_dump(mp
->state
, state_str
, sizeof(state_str
));
766 zlog_debug("MSDP peer %s state chg to %s", mp
->key_str
, state_str
);
769 /* MSDP Connection State Machine actions (defined in RFC-3618:Sec-11.2) */
770 /* 11.2.A2: active peer - start connect retry timer; when the timer fires
771 * a tcp connection will be made */
773 pim_msdp_peer_connect(struct pim_msdp_peer
*mp
)
775 mp
->state
= PIM_MSDP_CONNECTING
;
776 if (PIM_DEBUG_MSDP_EVENTS
) {
777 pim_msdp_peer_state_chg_log(mp
);
780 pim_msdp_peer_cr_timer_setup(mp
, true /* start */);
783 /* 11.2.A3: passive peer - just listen for connections */
785 pim_msdp_peer_listen(struct pim_msdp_peer
*mp
)
787 mp
->state
= PIM_MSDP_LISTEN
;
788 if (PIM_DEBUG_MSDP_EVENTS
) {
789 pim_msdp_peer_state_chg_log(mp
);
792 /* this is interntionally asymmetric i.e. we set up listen-socket when the
793 * first listening peer is configured; but don't bother tearing it down when
794 * all the peers go down */
795 pim_msdp_sock_listen();
798 /* 11.2.A4 and 11.2.A5: transition active or passive peer to
799 * established state */
801 pim_msdp_peer_established(struct pim_msdp_peer
*mp
)
803 if (mp
->state
!= PIM_MSDP_ESTABLISHED
) {
807 mp
->state
= PIM_MSDP_ESTABLISHED
;
808 mp
->uptime
= pim_time_monotonic_sec();
810 if (PIM_DEBUG_MSDP_EVENTS
) {
811 pim_msdp_peer_state_chg_log(mp
);
814 /* stop retry timer on active peers */
815 pim_msdp_peer_cr_timer_setup(mp
, false /* start */);
817 /* send KA; start KA and hold timers */
818 pim_msdp_pkt_ka_tx(mp
);
819 pim_msdp_peer_ka_timer_setup(mp
, true /* start */);
820 pim_msdp_peer_hold_timer_setup(mp
, true /* start */);
822 pim_msdp_pkt_sa_tx_to_one_peer(mp
);
824 PIM_MSDP_PEER_WRITE_ON(mp
);
825 PIM_MSDP_PEER_READ_ON(mp
);
828 /* 11.2.A6, 11.2.A7 and 11.2.A8: shutdown the peer tcp connection */
830 pim_msdp_peer_stop_tcp_conn(struct pim_msdp_peer
*mp
, bool chg_state
)
833 if (mp
->state
== PIM_MSDP_ESTABLISHED
) {
836 mp
->state
= PIM_MSDP_INACTIVE
;
837 if (PIM_DEBUG_MSDP_EVENTS
) {
838 pim_msdp_peer_state_chg_log(mp
);
842 if (PIM_DEBUG_MSDP_INTERNAL
) {
843 zlog_debug("MSDP peer %s pim_msdp_peer_stop_tcp_conn", mp
->key_str
);
845 /* stop read and write threads */
846 PIM_MSDP_PEER_READ_OFF(mp
);
847 PIM_MSDP_PEER_WRITE_OFF(mp
);
852 stream_reset(mp
->ibuf
);
854 stream_fifo_clean(mp
->obuf
);
856 /* stop all peer timers */
857 pim_msdp_peer_ka_timer_setup(mp
, false /* start */);
858 pim_msdp_peer_cr_timer_setup(mp
, false /* start */);
859 pim_msdp_peer_hold_timer_setup(mp
, false /* start */);
861 /* close connection */
868 /* RFC-3618:Sec-5.6 - stop the peer tcp connection and startover */
870 pim_msdp_peer_reset_tcp_conn(struct pim_msdp_peer
*mp
, const char *rc_str
)
872 if (PIM_DEBUG_EVENTS
) {
873 zlog_debug("MSDP peer %s tcp reset %s", mp
->key_str
, rc_str
);
874 snprintf(mp
->last_reset
, sizeof(mp
->last_reset
), "%s", rc_str
);
877 /* close the connection and transition to listening or connecting */
878 pim_msdp_peer_stop_tcp_conn(mp
, true /* chg_state */);
879 if (PIM_MSDP_PEER_IS_LISTENER(mp
)) {
880 pim_msdp_peer_listen(mp
);
882 pim_msdp_peer_connect(mp
);
887 pim_msdp_peer_timer_expiry_log(struct pim_msdp_peer
*mp
, const char *timer_str
)
889 zlog_debug("MSDP peer %s %s timer expired", mp
->key_str
, timer_str
);
892 /* RFC-3618:Sec-5.4 - peer hold timer */
894 pim_msdp_peer_hold_timer_cb(struct thread
*t
)
896 struct pim_msdp_peer
*mp
;
900 if (PIM_DEBUG_MSDP_EVENTS
) {
901 pim_msdp_peer_timer_expiry_log(mp
, "hold");
904 if (mp
->state
!= PIM_MSDP_ESTABLISHED
) {
908 if (PIM_DEBUG_MSDP_EVENTS
) {
909 pim_msdp_peer_state_chg_log(mp
);
911 pim_msdp_peer_reset_tcp_conn(mp
, "ht-expired");
915 pim_msdp_peer_hold_timer_setup(struct pim_msdp_peer
*mp
, bool start
)
917 THREAD_OFF(mp
->hold_timer
);
919 thread_add_timer(msdp
->master
, pim_msdp_peer_hold_timer_cb
, mp
,
920 PIM_MSDP_PEER_HOLD_TIME
, &mp
->hold_timer
);
925 /* RFC-3618:Sec-5.5 - peer keepalive timer */
927 pim_msdp_peer_ka_timer_cb(struct thread
*t
)
929 struct pim_msdp_peer
*mp
;
933 if (PIM_DEBUG_MSDP_EVENTS
) {
934 pim_msdp_peer_timer_expiry_log(mp
, "ka");
937 pim_msdp_pkt_ka_tx(mp
);
938 pim_msdp_peer_ka_timer_setup(mp
, true /* start */);
942 pim_msdp_peer_ka_timer_setup(struct pim_msdp_peer
*mp
, bool start
)
944 THREAD_OFF(mp
->ka_timer
);
946 thread_add_timer(msdp
->master
, pim_msdp_peer_ka_timer_cb
, mp
,
947 PIM_MSDP_PEER_KA_TIME
, &mp
->ka_timer
);
952 pim_msdp_peer_active_connect(struct pim_msdp_peer
*mp
)
956 rc
= pim_msdp_sock_connect(mp
);
958 if (PIM_DEBUG_MSDP_INTERNAL
) {
959 zlog_debug("MSDP peer %s pim_msdp_peer_active_connect: %d", mp
->key_str
, rc
);
965 /* connect failed restart the connect-retry timer */
966 pim_msdp_peer_cr_timer_setup(mp
, true /* start */);
969 case connect_success
:
970 /* connect was sucessful move to established */
971 pim_msdp_peer_established(mp
);
974 case connect_in_progress
:
975 /* for NB content we need to wait till sock is readable or
977 PIM_MSDP_PEER_WRITE_ON(mp
);
978 PIM_MSDP_PEER_READ_ON(mp
);
979 /* also restart connect-retry timer to reset the socket if connect is
981 pim_msdp_peer_cr_timer_setup(mp
, true /* start */);
986 /* RFC-3618:Sec-5.6 - connection retry on active peer */
988 pim_msdp_peer_cr_timer_cb(struct thread
*t
)
990 struct pim_msdp_peer
*mp
;
994 if (PIM_DEBUG_MSDP_EVENTS
) {
995 pim_msdp_peer_timer_expiry_log(mp
, "connect-retry");
998 if (mp
->state
!= PIM_MSDP_CONNECTING
|| PIM_MSDP_PEER_IS_LISTENER(mp
)) {
1002 pim_msdp_peer_active_connect(mp
);
1006 pim_msdp_peer_cr_timer_setup(struct pim_msdp_peer
*mp
, bool start
)
1008 THREAD_OFF(mp
->cr_timer
);
1010 thread_add_timer(msdp
->master
, pim_msdp_peer_cr_timer_cb
, mp
,
1011 PIM_MSDP_PEER_CONNECT_RETRY_TIME
, &mp
->cr_timer
);
1015 /* if a valid packet is rxed from the peer we can restart hold timer */
1017 pim_msdp_peer_pkt_rxed(struct pim_msdp_peer
*mp
)
1019 if (mp
->state
== PIM_MSDP_ESTABLISHED
) {
1020 pim_msdp_peer_hold_timer_setup(mp
, true /* start */);
1024 /* if a valid packet is txed to the peer we can restart ka timer and avoid
1025 * unnecessary ka noise in the network */
1027 pim_msdp_peer_pkt_txed(struct pim_msdp_peer
*mp
)
1029 if (mp
->state
== PIM_MSDP_ESTABLISHED
) {
1030 pim_msdp_peer_ka_timer_setup(mp
, true /* start */);
1031 if (PIM_DEBUG_MSDP_INTERNAL
) {
1032 zlog_debug("MSDP ka timer restart on pkt tx to %s", mp
->key_str
);
1037 static void pim_msdp_addr2su(union sockunion
*su
, struct in_addr addr
)
1040 su
->sin
.sin_addr
= addr
;
1041 su
->sin
.sin_family
= AF_INET
;
1042 #ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN
1043 su
->sin
.sin_len
= sizeof(struct sockaddr_in
);
1044 #endif /* HAVE_STRUCT_SOCKADDR_IN_SIN_LEN */
1047 /* 11.2.A1: create a new peer and transition state to listen or connecting */
1048 static enum pim_msdp_err
1049 pim_msdp_peer_new(struct in_addr peer_addr
, struct in_addr local_addr
,
1050 const char *mesh_group_name
, struct pim_msdp_peer
**mp_p
)
1052 struct pim_msdp_peer
*mp
;
1056 mp
= XCALLOC(MTYPE_PIM_MSDP_PEER
, sizeof(*mp
));
1058 zlog_err("%s: PIM XCALLOC(%zu) failure",
1059 __PRETTY_FUNCTION__
, sizeof(*mp
));
1060 return PIM_MSDP_ERR_OOM
;
1063 mp
->peer
= peer_addr
;
1064 pim_inet4_dump("<peer?>", mp
->peer
, mp
->key_str
, sizeof(mp
->key_str
));
1065 pim_msdp_addr2su(&mp
->su_peer
, mp
->peer
);
1066 mp
->local
= local_addr
;
1067 /* XXX: originator_id setting needs to move to the mesh group */
1068 msdp
->originator_id
= local_addr
;
1069 pim_msdp_addr2su(&mp
->su_local
, mp
->local
);
1070 mp
->mesh_group_name
= XSTRDUP(MTYPE_PIM_MSDP_MG_NAME
, mesh_group_name
);
1071 mp
->state
= PIM_MSDP_INACTIVE
;
1073 strcpy(mp
->last_reset
, "-");
1074 /* higher IP address is listener */
1075 if (ntohl(mp
->local
.s_addr
) > ntohl(mp
->peer
.s_addr
)) {
1076 mp
->flags
|= PIM_MSDP_PEERF_LISTENER
;
1079 /* setup packet buffers */
1080 mp
->ibuf
= stream_new(PIM_MSDP_MAX_PACKET_SIZE
);
1081 mp
->obuf
= stream_fifo_new();
1083 /* insert into misc tables for easy access */
1084 mp
= hash_get(msdp
->peer_hash
, mp
, hash_alloc_intern
);
1085 listnode_add_sort(msdp
->peer_list
, mp
);
1087 if (PIM_DEBUG_MSDP_EVENTS
) {
1088 zlog_debug("MSDP peer %s created", mp
->key_str
);
1090 pim_msdp_peer_state_chg_log(mp
);
1093 /* fireup the connect state machine */
1094 if (PIM_MSDP_PEER_IS_LISTENER(mp
)) {
1095 pim_msdp_peer_listen(mp
);
1097 pim_msdp_peer_connect(mp
);
1102 return PIM_MSDP_ERR_NONE
;
1105 struct pim_msdp_peer
*
1106 pim_msdp_peer_find(struct in_addr peer_addr
)
1108 struct pim_msdp_peer lookup
;
1110 lookup
.peer
= peer_addr
;
1111 return hash_lookup(msdp
->peer_hash
, &lookup
);
1114 /* add peer configuration if it doesn't already exist */
1116 pim_msdp_peer_add(struct in_addr peer_addr
, struct in_addr local_addr
,
1117 const char *mesh_group_name
, struct pim_msdp_peer
**mp_p
)
1119 struct pim_msdp_peer
*mp
;
1125 if (peer_addr
.s_addr
== local_addr
.s_addr
) {
1126 /* skip session setup if config is invalid */
1127 if (PIM_DEBUG_MSDP_EVENTS
) {
1128 char peer_str
[INET_ADDRSTRLEN
];
1130 pim_inet4_dump("<peer?>", peer_addr
, peer_str
, sizeof(peer_str
));
1131 zlog_debug("%s add skipped as DIP=SIP", peer_str
);
1133 return PIM_MSDP_ERR_SIP_EQ_DIP
;
1136 mp
= pim_msdp_peer_find(peer_addr
);
1141 return PIM_MSDP_ERR_PEER_EXISTS
;
1144 return pim_msdp_peer_new(peer_addr
, local_addr
, mesh_group_name
, mp_p
);
1147 /* release all mem associated with a peer */
1149 pim_msdp_peer_free(struct pim_msdp_peer
*mp
)
1152 stream_free(mp
->ibuf
);
1156 stream_fifo_free(mp
->obuf
);
1159 if (mp
->mesh_group_name
) {
1160 XFREE(MTYPE_PIM_MSDP_MG_NAME
, mp
->mesh_group_name
);
1162 XFREE(MTYPE_PIM_MSDP_PEER
, mp
);
1165 /* delete the peer config */
1166 static enum pim_msdp_err
1167 pim_msdp_peer_do_del(struct pim_msdp_peer
*mp
)
1169 /* stop the tcp connection and shutdown all timers */
1170 pim_msdp_peer_stop_tcp_conn(mp
, true /* chg_state */);
1172 /* remove the session from various tables */
1173 listnode_delete(msdp
->peer_list
, mp
);
1174 hash_release(msdp
->peer_hash
, mp
);
1176 if (PIM_DEBUG_MSDP_EVENTS
) {
1177 zlog_debug("MSDP peer %s deleted", mp
->key_str
);
1180 /* free up any associated memory */
1181 pim_msdp_peer_free(mp
);
1183 return PIM_MSDP_ERR_NONE
;
1187 pim_msdp_peer_del(struct in_addr peer_addr
)
1189 struct pim_msdp_peer
*mp
;
1191 mp
= pim_msdp_peer_find(peer_addr
);
1193 return PIM_MSDP_ERR_NO_PEER
;
1196 return pim_msdp_peer_do_del(mp
);
1199 /* peer hash and peer list helpers */
1201 pim_msdp_peer_hash_key_make(void *p
)
1203 struct pim_msdp_peer
*mp
= p
;
1204 return (jhash_1word(mp
->peer
.s_addr
, 0));
1208 pim_msdp_peer_hash_eq(const void *p1
, const void *p2
)
1210 const struct pim_msdp_peer
*mp1
= p1
;
1211 const struct pim_msdp_peer
*mp2
= p2
;
1213 return (mp1
->peer
.s_addr
== mp2
->peer
.s_addr
);
1217 pim_msdp_peer_comp(const void *p1
, const void *p2
)
1219 const struct pim_msdp_peer
*mp1
= p1
;
1220 const struct pim_msdp_peer
*mp2
= p2
;
1222 if (ntohl(mp1
->peer
.s_addr
) < ntohl(mp2
->peer
.s_addr
))
1225 if (ntohl(mp1
->peer
.s_addr
) > ntohl(mp2
->peer
.s_addr
))
1231 /************************** Mesh group management **************************/
1233 pim_msdp_mg_free(struct pim_msdp_mg
*mg
)
1235 /* If the mesh-group has valid member or src_ip don't delete it */
1236 if (!mg
|| mg
->mbr_cnt
|| (mg
->src_ip
.s_addr
!= INADDR_ANY
)) {
1240 if (PIM_DEBUG_MSDP_EVENTS
) {
1241 zlog_debug("MSDP mesh-group %s deleted", mg
->mesh_group_name
);
1243 if (mg
->mesh_group_name
)
1244 XFREE(MTYPE_PIM_MSDP_MG_NAME
, mg
->mesh_group_name
);
1247 list_free(mg
->mbr_list
);
1249 XFREE(MTYPE_PIM_MSDP_MG
, mg
);
1253 static struct pim_msdp_mg
*
1254 pim_msdp_mg_new(const char *mesh_group_name
)
1256 struct pim_msdp_mg
*mg
;
1258 mg
= XCALLOC(MTYPE_PIM_MSDP_MG
, sizeof(*mg
));
1260 zlog_err("%s: PIM XCALLOC(%zu) failure",
1261 __PRETTY_FUNCTION__
, sizeof(*mg
));
1265 mg
->mesh_group_name
= XSTRDUP(MTYPE_PIM_MSDP_MG_NAME
, mesh_group_name
);
1266 mg
->mbr_list
= list_new();
1267 mg
->mbr_list
->del
= (void (*)(void *))pim_msdp_mg_mbr_free
;
1268 mg
->mbr_list
->cmp
= (int (*)(void *, void *))pim_msdp_mg_mbr_comp
;
1270 if (PIM_DEBUG_MSDP_EVENTS
) {
1271 zlog_debug("MSDP mesh-group %s created", mg
->mesh_group_name
);
1277 pim_msdp_mg_del(const char *mesh_group_name
)
1279 struct pim_msdp_mg
*mg
= msdp
->mg
;
1280 struct pim_msdp_mg_mbr
*mbr
;
1282 if (!mg
|| strcmp(mg
->mesh_group_name
, mesh_group_name
)) {
1283 return PIM_MSDP_ERR_NO_MG
;
1286 /* delete all the mesh-group members */
1287 while (!list_isempty(mg
->mbr_list
)) {
1288 mbr
= listnode_head(mg
->mbr_list
);
1289 pim_msdp_mg_mbr_do_del(mg
, mbr
);
1293 mg
->src_ip
.s_addr
= INADDR_ANY
;
1295 /* free up the mesh-group */
1296 pim_msdp_mg_free(mg
);
1297 return PIM_MSDP_ERR_NONE
;
1300 static enum pim_msdp_err
1301 pim_msdp_mg_add(const char *mesh_group_name
)
1304 if (!strcmp(msdp
->mg
->mesh_group_name
, mesh_group_name
)) {
1305 return PIM_MSDP_ERR_NONE
;
1307 /* currently only one mesh-group can exist at a time */
1308 return PIM_MSDP_ERR_MAX_MESH_GROUPS
;
1311 msdp
->mg
= pim_msdp_mg_new(mesh_group_name
);
1313 return PIM_MSDP_ERR_OOM
;
1316 return PIM_MSDP_ERR_NONE
;
1320 pim_msdp_mg_mbr_comp(const void *p1
, const void *p2
)
1322 const struct pim_msdp_mg_mbr
*mbr1
= p1
;
1323 const struct pim_msdp_mg_mbr
*mbr2
= p2
;
1325 if (ntohl(mbr1
->mbr_ip
.s_addr
) < ntohl(mbr2
->mbr_ip
.s_addr
))
1328 if (ntohl(mbr1
->mbr_ip
.s_addr
) > ntohl(mbr2
->mbr_ip
.s_addr
))
1335 pim_msdp_mg_mbr_free(struct pim_msdp_mg_mbr
*mbr
)
1337 XFREE(MTYPE_PIM_MSDP_MG_MBR
, mbr
);
1340 static struct pim_msdp_mg_mbr
*
1341 pim_msdp_mg_mbr_find(struct in_addr mbr_ip
)
1343 struct pim_msdp_mg_mbr
*mbr
;
1344 struct listnode
*mbr_node
;
1349 /* we can move this to a hash but considering that number of peers in
1350 * a mesh-group that seems like bit of an overkill */
1351 for (ALL_LIST_ELEMENTS_RO(msdp
->mg
->mbr_list
, mbr_node
, mbr
)) {
1352 if (mbr
->mbr_ip
.s_addr
== mbr_ip
.s_addr
) {
1360 pim_msdp_mg_mbr_add(const char *mesh_group_name
, struct in_addr mbr_ip
)
1363 struct pim_msdp_mg_mbr
*mbr
;
1364 struct pim_msdp_mg
*mg
;
1366 rc
= pim_msdp_mg_add(mesh_group_name
);
1367 if (rc
!= PIM_MSDP_ERR_NONE
) {
1372 mbr
= pim_msdp_mg_mbr_find(mbr_ip
);
1374 return PIM_MSDP_ERR_MG_MBR_EXISTS
;
1377 mbr
= XCALLOC(MTYPE_PIM_MSDP_MG_MBR
, sizeof(*mbr
));
1379 zlog_err("%s: PIM XCALLOC(%zu) failure",
1380 __PRETTY_FUNCTION__
, sizeof(*mbr
));
1381 /* if there are no references to the mg free it */
1382 pim_msdp_mg_free(mg
);
1383 return PIM_MSDP_ERR_OOM
;
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(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", mg
->mesh_group_name
, ip_str
);
1400 return PIM_MSDP_ERR_NONE
;
1404 pim_msdp_mg_mbr_do_del(struct pim_msdp_mg
*mg
, struct pim_msdp_mg_mbr
*mbr
)
1406 /* Delete active peer session if any */
1408 pim_msdp_peer_do_del(mbr
->mp
);
1411 listnode_delete(mg
->mbr_list
, mbr
);
1412 if (PIM_DEBUG_MSDP_EVENTS
) {
1413 char ip_str
[INET_ADDRSTRLEN
];
1414 pim_inet4_dump("<mbr?>", mbr
->mbr_ip
, ip_str
, sizeof(ip_str
));
1415 zlog_debug("MSDP mesh-group %s mbr %s deleted", mg
->mesh_group_name
, ip_str
);
1417 pim_msdp_mg_mbr_free(mbr
);
1424 pim_msdp_mg_mbr_del(const char *mesh_group_name
, struct in_addr mbr_ip
)
1426 struct pim_msdp_mg_mbr
*mbr
;
1427 struct pim_msdp_mg
*mg
= msdp
->mg
;
1429 if (!mg
|| strcmp(mg
->mesh_group_name
, mesh_group_name
)) {
1430 return PIM_MSDP_ERR_NO_MG
;
1433 mbr
= pim_msdp_mg_mbr_find(mbr_ip
);
1435 return PIM_MSDP_ERR_NO_MG_MBR
;
1438 pim_msdp_mg_mbr_do_del(mg
, mbr
);
1439 /* if there are no references to the mg free it */
1440 pim_msdp_mg_free(mg
);
1442 return PIM_MSDP_ERR_NONE
;
1446 pim_msdp_mg_src_do_del(void)
1448 struct pim_msdp_mg_mbr
*mbr
;
1449 struct listnode
*mbr_node
;
1450 struct pim_msdp_mg
*mg
= msdp
->mg
;
1452 /* SIP is being removed - tear down all active peer sessions */
1453 for (ALL_LIST_ELEMENTS_RO(mg
->mbr_list
, mbr_node
, mbr
)) {
1455 pim_msdp_peer_do_del(mbr
->mp
);
1459 if (PIM_DEBUG_MSDP_EVENTS
) {
1460 zlog_debug("MSDP mesh-group %s src cleared", mg
->mesh_group_name
);
1465 pim_msdp_mg_src_del(const char *mesh_group_name
)
1467 struct pim_msdp_mg
*mg
= msdp
->mg
;
1469 if (!mg
|| strcmp(mg
->mesh_group_name
, mesh_group_name
)) {
1470 return PIM_MSDP_ERR_NO_MG
;
1473 if (mg
->src_ip
.s_addr
!= INADDR_ANY
) {
1474 mg
->src_ip
.s_addr
= INADDR_ANY
;
1475 pim_msdp_mg_src_do_del();
1476 /* if there are no references to the mg free it */
1477 pim_msdp_mg_free(mg
);
1479 return PIM_MSDP_ERR_NONE
;
1483 pim_msdp_mg_src_add(const char *mesh_group_name
, struct in_addr src_ip
)
1486 struct pim_msdp_mg_mbr
*mbr
;
1487 struct listnode
*mbr_node
;
1488 struct pim_msdp_mg
*mg
;
1490 if (src_ip
.s_addr
== INADDR_ANY
) {
1491 pim_msdp_mg_src_del(mesh_group_name
);
1492 return PIM_MSDP_ERR_NONE
;
1495 rc
= pim_msdp_mg_add(mesh_group_name
);
1496 if (rc
!= PIM_MSDP_ERR_NONE
) {
1501 if (mg
->src_ip
.s_addr
!= INADDR_ANY
) {
1502 pim_msdp_mg_src_do_del();
1504 mg
->src_ip
= src_ip
;
1506 for (ALL_LIST_ELEMENTS_RO(mg
->mbr_list
, mbr_node
, mbr
)) {
1507 pim_msdp_peer_add(mbr
->mbr_ip
, mg
->src_ip
, mesh_group_name
,
1511 if (PIM_DEBUG_MSDP_EVENTS
) {
1512 char ip_str
[INET_ADDRSTRLEN
];
1513 pim_inet4_dump("<src?>", mg
->src_ip
, ip_str
, sizeof(ip_str
));
1514 zlog_debug("MSDP mesh-group %s src %s set", mg
->mesh_group_name
, ip_str
);
1516 return PIM_MSDP_ERR_NONE
;
1519 /*********************** MSDP feature APIs *********************************/
1521 pim_msdp_config_write(struct vty
*vty
)
1523 struct listnode
*mbrnode
;
1524 struct pim_msdp_mg_mbr
*mbr
;
1525 struct pim_msdp_mg
*mg
= msdp
->mg
;
1526 char mbr_str
[INET_ADDRSTRLEN
];
1527 char src_str
[INET_ADDRSTRLEN
];
1534 if (mg
->src_ip
.s_addr
!= INADDR_ANY
) {
1535 pim_inet4_dump("<src?>", mg
->src_ip
, src_str
, sizeof(src_str
));
1536 vty_outln (vty
, "ip msdp mesh-group %s source %s",
1537 mg
->mesh_group_name
, src_str
);
1541 for (ALL_LIST_ELEMENTS_RO(mg
->mbr_list
, mbrnode
, mbr
)) {
1542 pim_inet4_dump("<mbr?>", mbr
->mbr_ip
, mbr_str
, sizeof(mbr_str
));
1543 vty_outln (vty
, "ip msdp mesh-group %s member %s",
1544 mg
->mesh_group_name
, mbr_str
);
1550 /* Enable feature including active/periodic timers etc. on the first peer
1551 * config. Till then MSDP should just stay quiet. */
1553 pim_msdp_enable(void)
1555 if (msdp
->flags
& PIM_MSDPF_ENABLE
) {
1556 /* feature is already enabled */
1559 msdp
->flags
|= PIM_MSDPF_ENABLE
;
1560 msdp
->work_obuf
= stream_new(PIM_MSDP_MAX_PACKET_SIZE
);
1561 pim_msdp_sa_adv_timer_setup(true /* start */);
1562 /* setup sa cache based on local sources */
1563 pim_msdp_sa_local_setup();
1568 pim_msdp_init(struct thread_master
*master
)
1570 msdp
->master
= master
;
1572 msdp
->peer_hash
= hash_create(pim_msdp_peer_hash_key_make
,
1573 pim_msdp_peer_hash_eq
);
1574 msdp
->peer_list
= list_new();
1575 msdp
->peer_list
->del
= (void (*)(void *))pim_msdp_peer_free
;
1576 msdp
->peer_list
->cmp
= (int (*)(void *, void *))pim_msdp_peer_comp
;
1578 msdp
->sa_hash
= hash_create(pim_msdp_sa_hash_key_make
,
1579 pim_msdp_sa_hash_eq
);
1580 msdp
->sa_list
= list_new();
1581 msdp
->sa_list
->del
= (void (*)(void *))pim_msdp_sa_free
;
1582 msdp
->sa_list
->cmp
= (int (*)(void *, void *))pim_msdp_sa_comp
;
1585 /* counterpart to MSDP init; XXX: unused currently */
1589 /* XXX: stop listener and delete all peer sessions */
1591 if (msdp
->peer_hash
) {
1592 hash_free(msdp
->peer_hash
);
1593 msdp
->peer_hash
= NULL
;
1596 if (msdp
->peer_list
) {
1597 list_free(msdp
->peer_list
);
1598 msdp
->peer_list
= NULL
;