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1 | /* | |
2 | * IP MSDP for Quagga | |
3 | * Copyright (C) 2016 Cumulus Networks, Inc. | |
4 | * | |
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. | |
9 | * | |
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. | |
14 | * | |
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 | |
18 | */ | |
19 | ||
20 | #include <zebra.h> | |
21 | ||
22 | #include <lib/hash.h> | |
23 | #include <lib/jhash.h> | |
24 | #include <lib/log.h> | |
25 | #include <lib/prefix.h> | |
26 | #include <lib/sockunion.h> | |
27 | #include <lib/stream.h> | |
28 | #include <lib/thread.h> | |
29 | #include <lib/vty.h> | |
30 | #include <lib/plist.h> | |
31 | #include <lib/lib_errors.h> | |
32 | ||
33 | #include "pimd.h" | |
34 | #include "pim_cmd.h" | |
35 | #include "pim_memory.h" | |
36 | #include "pim_iface.h" | |
37 | #include "pim_rp.h" | |
38 | #include "pim_str.h" | |
39 | #include "pim_time.h" | |
40 | #include "pim_upstream.h" | |
41 | #include "pim_oil.h" | |
42 | ||
43 | #include "pim_msdp.h" | |
44 | #include "pim_msdp_packet.h" | |
45 | #include "pim_msdp_socket.h" | |
46 | ||
47 | // struct pim_msdp pim_msdp, *msdp = &pim_msdp; | |
48 | ||
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, | |
53 | bool start); | |
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); | |
63 | ||
64 | /************************ SA cache management ******************************/ | |
65 | static void pim_msdp_sa_timer_expiry_log(struct pim_msdp_sa *sa, | |
66 | const char *timer_str) | |
67 | { | |
68 | zlog_debug("MSDP SA %s %s timer expired", sa->sg_str, timer_str); | |
69 | } | |
70 | ||
71 | /* RFC-3618:Sec-5.1 - global active source advertisement timer */ | |
72 | static int pim_msdp_sa_adv_timer_cb(struct thread *t) | |
73 | { | |
74 | struct pim_instance *pim = THREAD_ARG(t); | |
75 | ||
76 | if (PIM_DEBUG_MSDP_EVENTS) { | |
77 | zlog_debug("MSDP SA advertisement timer expired"); | |
78 | } | |
79 | ||
80 | pim_msdp_sa_adv_timer_setup(pim, true /* start */); | |
81 | pim_msdp_pkt_sa_tx(pim); | |
82 | return 0; | |
83 | } | |
84 | static void pim_msdp_sa_adv_timer_setup(struct pim_instance *pim, bool start) | |
85 | { | |
86 | THREAD_OFF(pim->msdp.sa_adv_timer); | |
87 | if (start) { | |
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); | |
91 | } | |
92 | } | |
93 | ||
94 | /* RFC-3618:Sec-5.3 - SA cache state timer */ | |
95 | static int pim_msdp_sa_state_timer_cb(struct thread *t) | |
96 | { | |
97 | struct pim_msdp_sa *sa; | |
98 | ||
99 | sa = THREAD_ARG(t); | |
100 | ||
101 | if (PIM_DEBUG_MSDP_EVENTS) { | |
102 | pim_msdp_sa_timer_expiry_log(sa, "state"); | |
103 | } | |
104 | ||
105 | pim_msdp_sa_deref(sa, PIM_MSDP_SAF_PEER); | |
106 | return 0; | |
107 | } | |
108 | static void pim_msdp_sa_state_timer_setup(struct pim_msdp_sa *sa, bool start) | |
109 | { | |
110 | THREAD_OFF(sa->sa_state_timer); | |
111 | if (start) { | |
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); | |
115 | } | |
116 | } | |
117 | ||
118 | static void pim_msdp_sa_upstream_del(struct pim_msdp_sa *sa) | |
119 | { | |
120 | struct pim_upstream *up = sa->up; | |
121 | if (!up) { | |
122 | return; | |
123 | } | |
124 | ||
125 | sa->up = NULL; | |
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; | |
131 | } | |
132 | ||
133 | if (PIM_DEBUG_MSDP_EVENTS) { | |
134 | zlog_debug("MSDP SA %s de-referenced SPT", sa->sg_str); | |
135 | } | |
136 | } | |
137 | ||
138 | static bool pim_msdp_sa_upstream_add_ok(struct pim_msdp_sa *sa, | |
139 | struct pim_upstream *xg_up) | |
140 | { | |
141 | if (!(sa->flags & PIM_MSDP_SAF_PEER)) { | |
142 | /* SA should have been rxed from a peer */ | |
143 | return false; | |
144 | } | |
145 | /* check if we are RP */ | |
146 | if (!I_am_RP(sa->pim, sa->sg.grp)) { | |
147 | return false; | |
148 | } | |
149 | ||
150 | /* check if we have a (*, G) with a non-empty immediate OIL */ | |
151 | if (!xg_up) { | |
152 | struct prefix_sg sg; | |
153 | ||
154 | memset(&sg, 0, sizeof(sg)); | |
155 | sg.grp = sa->sg.grp; | |
156 | ||
157 | xg_up = pim_upstream_find(sa->pim, &sg); | |
158 | } | |
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 | |
162 | * rest of | |
163 | * the magic */ | |
164 | return false; | |
165 | } | |
166 | ||
167 | return true; | |
168 | } | |
169 | ||
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 | |
177 | * */ | |
178 | static void pim_msdp_sa_upstream_update(struct pim_msdp_sa *sa, | |
179 | struct pim_upstream *xg_up, | |
180 | const char *ctx) | |
181 | { | |
182 | struct pim_upstream *up; | |
183 | ||
184 | if (!pim_msdp_sa_upstream_add_ok(sa, xg_up)) { | |
185 | pim_msdp_sa_upstream_del(sa); | |
186 | return; | |
187 | } | |
188 | ||
189 | if (sa->up) { | |
190 | /* nothing to do */ | |
191 | return; | |
192 | } | |
193 | ||
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 */ | |
197 | sa->up = up; | |
198 | if (PIM_DEBUG_MSDP_EVENTS) { | |
199 | zlog_debug("MSDP SA %s SPT reference missing", | |
200 | sa->sg_str); | |
201 | } | |
202 | return; | |
203 | } | |
204 | ||
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); | |
210 | ||
211 | sa->up = up; | |
212 | if (up) { | |
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 | |
216 | * when the | |
217 | * SA ages out */ | |
218 | if (PIM_DEBUG_MSDP_EVENTS) { | |
219 | zlog_debug("MSDP SA %s referenced SPT", sa->sg_str); | |
220 | } | |
221 | } else { | |
222 | if (PIM_DEBUG_MSDP_EVENTS) { | |
223 | zlog_debug("MSDP SA %s SPT reference failed", | |
224 | sa->sg_str); | |
225 | } | |
226 | } | |
227 | } | |
228 | ||
229 | /* release all mem associated with a sa */ | |
230 | static void pim_msdp_sa_free(struct pim_msdp_sa *sa) | |
231 | { | |
232 | pim_msdp_sa_state_timer_setup(sa, false); | |
233 | ||
234 | XFREE(MTYPE_PIM_MSDP_SA, sa); | |
235 | } | |
236 | ||
237 | static struct pim_msdp_sa *pim_msdp_sa_new(struct pim_instance *pim, | |
238 | struct prefix_sg *sg, | |
239 | struct in_addr rp) | |
240 | { | |
241 | struct pim_msdp_sa *sa; | |
242 | ||
243 | sa = XCALLOC(MTYPE_PIM_MSDP_SA, sizeof(*sa)); | |
244 | ||
245 | sa->pim = pim; | |
246 | sa->sg = *sg; | |
247 | pim_str_sg_set(sg, sa->sg_str); | |
248 | sa->rp = rp; | |
249 | sa->uptime = pim_time_monotonic_sec(); | |
250 | ||
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); | |
254 | ||
255 | if (PIM_DEBUG_MSDP_EVENTS) { | |
256 | zlog_debug("MSDP SA %s created", sa->sg_str); | |
257 | } | |
258 | ||
259 | return sa; | |
260 | } | |
261 | ||
262 | static struct pim_msdp_sa *pim_msdp_sa_find(struct pim_instance *pim, | |
263 | struct prefix_sg *sg) | |
264 | { | |
265 | struct pim_msdp_sa lookup; | |
266 | ||
267 | lookup.sg = *sg; | |
268 | return hash_lookup(pim->msdp.sa_hash, &lookup); | |
269 | } | |
270 | ||
271 | static struct pim_msdp_sa *pim_msdp_sa_add(struct pim_instance *pim, | |
272 | struct prefix_sg *sg, | |
273 | struct in_addr rp) | |
274 | { | |
275 | struct pim_msdp_sa *sa; | |
276 | ||
277 | sa = pim_msdp_sa_find(pim, sg); | |
278 | if (sa) { | |
279 | return sa; | |
280 | } | |
281 | ||
282 | return pim_msdp_sa_new(pim, sg, rp); | |
283 | } | |
284 | ||
285 | static void pim_msdp_sa_del(struct pim_msdp_sa *sa) | |
286 | { | |
287 | /* this is somewhat redundant - still want to be careful not to leave | |
288 | * stale upstream references */ | |
289 | pim_msdp_sa_upstream_del(sa); | |
290 | ||
291 | /* stop timers */ | |
292 | pim_msdp_sa_state_timer_setup(sa, false /* start */); | |
293 | ||
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); | |
297 | ||
298 | if (PIM_DEBUG_MSDP_EVENTS) { | |
299 | zlog_debug("MSDP SA %s deleted", sa->sg_str); | |
300 | } | |
301 | ||
302 | /* free up any associated memory */ | |
303 | pim_msdp_sa_free(sa); | |
304 | } | |
305 | ||
306 | static void pim_msdp_sa_peer_ip_set(struct pim_msdp_sa *sa, | |
307 | struct pim_msdp_peer *mp, struct in_addr rp) | |
308 | { | |
309 | struct pim_msdp_peer *old_mp; | |
310 | ||
311 | /* optimize the "no change" case as it will happen | |
312 | * frequently/periodically */ | |
313 | if (mp && (sa->peer.s_addr == mp->peer.s_addr)) { | |
314 | return; | |
315 | } | |
316 | ||
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) { | |
321 | --old_mp->sa_cnt; | |
322 | } | |
323 | } | |
324 | ||
325 | if (mp) { | |
326 | ++mp->sa_cnt; | |
327 | sa->peer = mp->peer; | |
328 | } else { | |
329 | sa->peer.s_addr = PIM_NET_INADDR_ANY; | |
330 | } | |
331 | sa->rp = rp; | |
332 | } | |
333 | ||
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 | |
337 | * SA. | |
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 | |
341 | * peer goes down? */ | |
342 | static void pim_msdp_sa_deref(struct pim_msdp_sa *sa, | |
343 | enum pim_msdp_sa_flags flags) | |
344 | { | |
345 | bool update_up = false; | |
346 | ||
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", | |
351 | sa->sg_str); | |
352 | } | |
353 | if (sa->pim->msdp.local_cnt) | |
354 | --sa->pim->msdp.local_cnt; | |
355 | } | |
356 | } | |
357 | ||
358 | if ((sa->flags & PIM_MSDP_SAF_PEER)) { | |
359 | if (flags & PIM_MSDP_SAF_PEER) { | |
360 | struct in_addr rp; | |
361 | ||
362 | if (PIM_DEBUG_MSDP_EVENTS) { | |
363 | zlog_debug("MSDP SA %s peer reference removed", | |
364 | sa->sg_str); | |
365 | } | |
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 | |
370 | * reference on the | |
371 | * msdp entry */ | |
372 | update_up = true; | |
373 | } | |
374 | } | |
375 | ||
376 | sa->flags &= ~flags; | |
377 | if (update_up) { | |
378 | pim_msdp_sa_upstream_update(sa, NULL /* xg_up */, "sa-deref"); | |
379 | } | |
380 | ||
381 | if (!(sa->flags & PIM_MSDP_SAF_REF)) { | |
382 | pim_msdp_sa_del(sa); | |
383 | } | |
384 | } | |
385 | ||
386 | void pim_msdp_sa_ref(struct pim_instance *pim, struct pim_msdp_peer *mp, | |
387 | struct prefix_sg *sg, struct in_addr rp) | |
388 | { | |
389 | struct pim_msdp_sa *sa; | |
390 | ||
391 | sa = pim_msdp_sa_add(pim, sg, rp); | |
392 | if (!sa) { | |
393 | return; | |
394 | } | |
395 | ||
396 | /* reference it */ | |
397 | if (mp) { | |
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", | |
402 | sa->sg_str); | |
403 | } | |
404 | } | |
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 | |
409 | * a | |
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"); | |
413 | } else { | |
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", | |
419 | sa->sg_str); | |
420 | } | |
421 | /* send an immediate SA update to peers */ | |
422 | pim_msdp_pkt_sa_tx_one(sa); | |
423 | } | |
424 | sa->flags &= ~PIM_MSDP_SAF_STALE; | |
425 | } | |
426 | } | |
427 | ||
428 | /* The following criteria must be met to originate an SA from the MSDP | |
429 | * speaker - | |
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 | |
435 | * satisfied if - | |
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))). | |
439 | */ | |
440 | static bool pim_msdp_sa_local_add_ok(struct pim_upstream *up) | |
441 | { | |
442 | struct pim_instance *pim = up->channel_oil->pim; | |
443 | ||
444 | if (!(pim->msdp.flags & PIM_MSDPF_ENABLE)) { | |
445 | return false; | |
446 | } | |
447 | ||
448 | if (!up->t_ka_timer) { | |
449 | /* stream is not active */ | |
450 | return false; | |
451 | } | |
452 | ||
453 | if (!I_am_RP(pim, up->sg.grp)) { | |
454 | /* we are not RP for the group */ | |
455 | return false; | |
456 | } | |
457 | ||
458 | /* we are the FHR-DR for this stream or we are RP and have seen | |
459 | * registers | |
460 | * from a FHR for this source */ | |
461 | if (PIM_UPSTREAM_FLAG_TEST_FHR(up->flags) || up->t_msdp_reg_timer) { | |
462 | return true; | |
463 | } | |
464 | ||
465 | return false; | |
466 | } | |
467 | ||
468 | static void pim_msdp_sa_local_add(struct pim_instance *pim, | |
469 | struct prefix_sg *sg) | |
470 | { | |
471 | struct in_addr rp; | |
472 | rp.s_addr = 0; | |
473 | pim_msdp_sa_ref(pim, NULL /* mp */, sg, rp); | |
474 | } | |
475 | ||
476 | void pim_msdp_sa_local_del(struct pim_instance *pim, struct prefix_sg *sg) | |
477 | { | |
478 | struct pim_msdp_sa *sa; | |
479 | ||
480 | sa = pim_msdp_sa_find(pim, sg); | |
481 | if (sa) { | |
482 | pim_msdp_sa_deref(sa, PIM_MSDP_SAF_LOCAL); | |
483 | } | |
484 | } | |
485 | ||
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) | |
490 | { | |
491 | struct pim_msdp_sa *sa; | |
492 | ||
493 | sa = pim_msdp_sa_find(pim, sg); | |
494 | if (sa) { | |
495 | if (PIM_DEBUG_MSDP_INTERNAL) { | |
496 | zlog_debug("MSDP local sa %s del on up del", | |
497 | sa->sg_str); | |
498 | } | |
499 | ||
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", | |
504 | sa->sg_str); | |
505 | } | |
506 | return; | |
507 | } | |
508 | ||
509 | if (sa->flags & PIM_MSDP_SAF_UP_DEL_IN_PROG) { | |
510 | /* MSDP is the one that triggered the upstream del. if | |
511 | * this happens | |
512 | * we most certainly have a bug in the PIM upstream | |
513 | * state machine. We | |
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 | |
519 | * changes; perhaps | |
520 | * address this in the next release? - XXX */ | |
521 | flog_err( | |
522 | EC_LIB_DEVELOPMENT, | |
523 | "MSDP sa %s SPT teardown is causing the local entry to be removed", | |
524 | sa->sg_str); | |
525 | return; | |
526 | } | |
527 | ||
528 | /* we are dropping the sa on upstream del we should not have an | |
529 | * upstream reference */ | |
530 | if (sa->up) { | |
531 | if (PIM_DEBUG_MSDP_INTERNAL) { | |
532 | zlog_debug("MSDP local sa %s del; up non-NULL", | |
533 | sa->sg_str); | |
534 | } | |
535 | sa->up = NULL; | |
536 | } | |
537 | pim_msdp_sa_deref(sa, PIM_MSDP_SAF_LOCAL); | |
538 | } | |
539 | } | |
540 | ||
541 | /* Local SA qualification needs to be re-evaluated when - | |
542 | * 1. KAT is started or stopped | |
543 | * 2. on RP changes | |
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 | |
549 | */ | |
550 | void pim_msdp_sa_local_update(struct pim_upstream *up) | |
551 | { | |
552 | struct pim_instance *pim = up->channel_oil->pim; | |
553 | ||
554 | if (pim_msdp_sa_local_add_ok(up)) { | |
555 | pim_msdp_sa_local_add(pim, &up->sg); | |
556 | } else { | |
557 | pim_msdp_sa_local_del(pim, &up->sg); | |
558 | } | |
559 | } | |
560 | ||
561 | static void pim_msdp_sa_local_setup(struct pim_instance *pim) | |
562 | { | |
563 | struct pim_upstream *up; | |
564 | struct listnode *up_node; | |
565 | ||
566 | for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, up_node, up)) { | |
567 | pim_msdp_sa_local_update(up); | |
568 | } | |
569 | } | |
570 | ||
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) | |
574 | { | |
575 | struct listnode *sanode; | |
576 | struct listnode *nextnode; | |
577 | struct pim_msdp_sa *sa; | |
578 | ||
579 | if (!(pim->msdp.flags & PIM_MSDPF_ENABLE)) { | |
580 | /* if the feature is not enabled do nothing */ | |
581 | return; | |
582 | } | |
583 | ||
584 | if (PIM_DEBUG_MSDP_INTERNAL) { | |
585 | zlog_debug("MSDP i_am_rp changed"); | |
586 | } | |
587 | ||
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; | |
592 | } | |
593 | } | |
594 | ||
595 | /* re-setup local SA entries */ | |
596 | pim_msdp_sa_local_setup(pim); | |
597 | ||
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 | |
602 | * after | |
603 | * "local-deref" */ | |
604 | sa->flags &= ~PIM_MSDP_SAF_STALE; | |
605 | /* sa_deref can end up freeing the sa; so don't access | |
606 | * contents after */ | |
607 | pim_msdp_sa_deref(sa, PIM_MSDP_SAF_LOCAL); | |
608 | } else { | |
609 | /* if the souce is still active check if we can | |
610 | * influence SPT */ | |
611 | pim_msdp_sa_upstream_update(sa, NULL /* xg_up */, | |
612 | "rp-change"); | |
613 | } | |
614 | } | |
615 | } | |
616 | ||
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 | |
619 | * (*, G) */ | |
620 | void pim_msdp_up_join_state_changed(struct pim_instance *pim, | |
621 | struct pim_upstream *xg_up) | |
622 | { | |
623 | struct listnode *sanode; | |
624 | struct pim_msdp_sa *sa; | |
625 | ||
626 | if (PIM_DEBUG_MSDP_INTERNAL) { | |
627 | zlog_debug("MSDP join state changed for %s", xg_up->sg_str); | |
628 | } | |
629 | ||
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)) { | |
633 | return; | |
634 | } | |
635 | ||
636 | /* XXX: Need to maintain SAs per-group to avoid all this unnecessary | |
637 | * walking */ | |
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) { | |
640 | continue; | |
641 | } | |
642 | pim_msdp_sa_upstream_update(sa, xg_up, "up-jp-change"); | |
643 | } | |
644 | } | |
645 | ||
646 | static void pim_msdp_up_xg_del(struct pim_instance *pim, struct prefix_sg *sg) | |
647 | { | |
648 | struct listnode *sanode; | |
649 | struct pim_msdp_sa *sa; | |
650 | ||
651 | if (PIM_DEBUG_MSDP_INTERNAL) { | |
652 | zlog_debug("MSDP %s del", pim_str_sg_dump(sg)); | |
653 | } | |
654 | ||
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)) { | |
657 | return; | |
658 | } | |
659 | ||
660 | /* XXX: Need to maintain SAs per-group to avoid all this unnecessary | |
661 | * walking */ | |
662 | for (ALL_LIST_ELEMENTS_RO(pim->msdp.sa_list, sanode, sa)) { | |
663 | if (sa->sg.grp.s_addr != sg->grp.s_addr) { | |
664 | continue; | |
665 | } | |
666 | pim_msdp_sa_upstream_update(sa, NULL /* xg */, "up-jp-change"); | |
667 | } | |
668 | } | |
669 | ||
670 | void pim_msdp_up_del(struct pim_instance *pim, struct prefix_sg *sg) | |
671 | { | |
672 | if (PIM_DEBUG_MSDP_INTERNAL) { | |
673 | zlog_debug("MSDP up %s del", pim_str_sg_dump(sg)); | |
674 | } | |
675 | if (sg->src.s_addr == INADDR_ANY) { | |
676 | pim_msdp_up_xg_del(pim, sg); | |
677 | } else { | |
678 | pim_msdp_sa_local_del_on_up_del(pim, sg); | |
679 | } | |
680 | } | |
681 | ||
682 | /* sa hash and peer list helpers */ | |
683 | static unsigned int pim_msdp_sa_hash_key_make(void *p) | |
684 | { | |
685 | struct pim_msdp_sa *sa = p; | |
686 | ||
687 | return (jhash_2words(sa->sg.src.s_addr, sa->sg.grp.s_addr, 0)); | |
688 | } | |
689 | ||
690 | static bool pim_msdp_sa_hash_eq(const void *p1, const void *p2) | |
691 | { | |
692 | const struct pim_msdp_sa *sa1 = p1; | |
693 | const struct pim_msdp_sa *sa2 = p2; | |
694 | ||
695 | return ((sa1->sg.src.s_addr == sa2->sg.src.s_addr) | |
696 | && (sa1->sg.grp.s_addr == sa2->sg.grp.s_addr)); | |
697 | } | |
698 | ||
699 | static int pim_msdp_sa_comp(const void *p1, const void *p2) | |
700 | { | |
701 | const struct pim_msdp_sa *sa1 = p1; | |
702 | const struct pim_msdp_sa *sa2 = p2; | |
703 | ||
704 | if (ntohl(sa1->sg.grp.s_addr) < ntohl(sa2->sg.grp.s_addr)) | |
705 | return -1; | |
706 | ||
707 | if (ntohl(sa1->sg.grp.s_addr) > ntohl(sa2->sg.grp.s_addr)) | |
708 | return 1; | |
709 | ||
710 | if (ntohl(sa1->sg.src.s_addr) < ntohl(sa2->sg.src.s_addr)) | |
711 | return -1; | |
712 | ||
713 | if (ntohl(sa1->sg.src.s_addr) > ntohl(sa2->sg.src.s_addr)) | |
714 | return 1; | |
715 | ||
716 | return 0; | |
717 | } | |
718 | ||
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) | |
722 | { | |
723 | if (mp->peer.s_addr == rp.s_addr) { | |
724 | return true; | |
725 | } | |
726 | ||
727 | return false; | |
728 | } | |
729 | ||
730 | /************************ Peer session management **************************/ | |
731 | char *pim_msdp_state_dump(enum pim_msdp_peer_state state, char *buf, | |
732 | int buf_size) | |
733 | { | |
734 | switch (state) { | |
735 | case PIM_MSDP_DISABLED: | |
736 | snprintf(buf, buf_size, "%s", "disabled"); | |
737 | break; | |
738 | case PIM_MSDP_INACTIVE: | |
739 | snprintf(buf, buf_size, "%s", "inactive"); | |
740 | break; | |
741 | case PIM_MSDP_LISTEN: | |
742 | snprintf(buf, buf_size, "%s", "listen"); | |
743 | break; | |
744 | case PIM_MSDP_CONNECTING: | |
745 | snprintf(buf, buf_size, "%s", "connecting"); | |
746 | break; | |
747 | case PIM_MSDP_ESTABLISHED: | |
748 | snprintf(buf, buf_size, "%s", "established"); | |
749 | break; | |
750 | default: | |
751 | snprintf(buf, buf_size, "unk-%d", state); | |
752 | } | |
753 | return buf; | |
754 | } | |
755 | ||
756 | char *pim_msdp_peer_key_dump(struct pim_msdp_peer *mp, char *buf, int buf_size, | |
757 | bool long_format) | |
758 | { | |
759 | char peer_str[INET_ADDRSTRLEN]; | |
760 | char local_str[INET_ADDRSTRLEN]; | |
761 | ||
762 | pim_inet4_dump("<peer?>", mp->peer, peer_str, sizeof(peer_str)); | |
763 | if (long_format) { | |
764 | pim_inet4_dump("<local?>", mp->local, local_str, | |
765 | sizeof(local_str)); | |
766 | snprintf(buf, buf_size, "MSDP peer %s local %s mg %s", peer_str, | |
767 | local_str, mp->mesh_group_name); | |
768 | } else { | |
769 | snprintf(buf, buf_size, "MSDP peer %s", peer_str); | |
770 | } | |
771 | ||
772 | return buf; | |
773 | } | |
774 | ||
775 | static void pim_msdp_peer_state_chg_log(struct pim_msdp_peer *mp) | |
776 | { | |
777 | char state_str[PIM_MSDP_STATE_STRLEN]; | |
778 | ||
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); | |
781 | } | |
782 | ||
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) | |
787 | { | |
788 | mp->state = PIM_MSDP_CONNECTING; | |
789 | if (PIM_DEBUG_MSDP_EVENTS) { | |
790 | pim_msdp_peer_state_chg_log(mp); | |
791 | } | |
792 | ||
793 | pim_msdp_peer_cr_timer_setup(mp, true /* start */); | |
794 | } | |
795 | ||
796 | /* 11.2.A3: passive peer - just listen for connections */ | |
797 | static void pim_msdp_peer_listen(struct pim_msdp_peer *mp) | |
798 | { | |
799 | mp->state = PIM_MSDP_LISTEN; | |
800 | if (PIM_DEBUG_MSDP_EVENTS) { | |
801 | pim_msdp_peer_state_chg_log(mp); | |
802 | } | |
803 | ||
804 | /* this is interntionally asymmetric i.e. we set up listen-socket when | |
805 | * the | |
806 | * first listening peer is configured; but don't bother tearing it down | |
807 | * when | |
808 | * all the peers go down */ | |
809 | pim_msdp_sock_listen(mp->pim); | |
810 | } | |
811 | ||
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) | |
815 | { | |
816 | if (mp->state != PIM_MSDP_ESTABLISHED) { | |
817 | ++mp->est_flaps; | |
818 | } | |
819 | ||
820 | mp->state = PIM_MSDP_ESTABLISHED; | |
821 | mp->uptime = pim_time_monotonic_sec(); | |
822 | ||
823 | if (PIM_DEBUG_MSDP_EVENTS) { | |
824 | pim_msdp_peer_state_chg_log(mp); | |
825 | } | |
826 | ||
827 | /* stop retry timer on active peers */ | |
828 | pim_msdp_peer_cr_timer_setup(mp, false /* start */); | |
829 | ||
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 */); | |
834 | ||
835 | pim_msdp_pkt_sa_tx_to_one_peer(mp); | |
836 | ||
837 | PIM_MSDP_PEER_WRITE_ON(mp); | |
838 | PIM_MSDP_PEER_READ_ON(mp); | |
839 | } | |
840 | ||
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) | |
843 | { | |
844 | if (chg_state) { | |
845 | if (mp->state == PIM_MSDP_ESTABLISHED) { | |
846 | ++mp->est_flaps; | |
847 | } | |
848 | mp->state = PIM_MSDP_INACTIVE; | |
849 | if (PIM_DEBUG_MSDP_EVENTS) { | |
850 | pim_msdp_peer_state_chg_log(mp); | |
851 | } | |
852 | } | |
853 | ||
854 | if (PIM_DEBUG_MSDP_INTERNAL) { | |
855 | zlog_debug("MSDP peer %s pim_msdp_peer_stop_tcp_conn", | |
856 | mp->key_str); | |
857 | } | |
858 | /* stop read and write threads */ | |
859 | PIM_MSDP_PEER_READ_OFF(mp); | |
860 | PIM_MSDP_PEER_WRITE_OFF(mp); | |
861 | ||
862 | /* reset buffers */ | |
863 | mp->packet_size = 0; | |
864 | if (mp->ibuf) | |
865 | stream_reset(mp->ibuf); | |
866 | if (mp->obuf) | |
867 | stream_fifo_clean(mp->obuf); | |
868 | ||
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 */); | |
873 | ||
874 | /* close connection */ | |
875 | if (mp->fd >= 0) { | |
876 | close(mp->fd); | |
877 | mp->fd = -1; | |
878 | } | |
879 | } | |
880 | ||
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) | |
883 | { | |
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); | |
887 | } | |
888 | ||
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); | |
893 | } else { | |
894 | pim_msdp_peer_connect(mp); | |
895 | } | |
896 | } | |
897 | ||
898 | static void pim_msdp_peer_timer_expiry_log(struct pim_msdp_peer *mp, | |
899 | const char *timer_str) | |
900 | { | |
901 | zlog_debug("MSDP peer %s %s timer expired", mp->key_str, timer_str); | |
902 | } | |
903 | ||
904 | /* RFC-3618:Sec-5.4 - peer hold timer */ | |
905 | static int pim_msdp_peer_hold_timer_cb(struct thread *t) | |
906 | { | |
907 | struct pim_msdp_peer *mp; | |
908 | ||
909 | mp = THREAD_ARG(t); | |
910 | ||
911 | if (PIM_DEBUG_MSDP_EVENTS) { | |
912 | pim_msdp_peer_timer_expiry_log(mp, "hold"); | |
913 | } | |
914 | ||
915 | if (mp->state != PIM_MSDP_ESTABLISHED) { | |
916 | return 0; | |
917 | } | |
918 | ||
919 | if (PIM_DEBUG_MSDP_EVENTS) { | |
920 | pim_msdp_peer_state_chg_log(mp); | |
921 | } | |
922 | pim_msdp_peer_reset_tcp_conn(mp, "ht-expired"); | |
923 | return 0; | |
924 | } | |
925 | ||
926 | static void pim_msdp_peer_hold_timer_setup(struct pim_msdp_peer *mp, bool start) | |
927 | { | |
928 | struct pim_instance *pim = mp->pim; | |
929 | THREAD_OFF(mp->hold_timer); | |
930 | if (start) { | |
931 | thread_add_timer(pim->msdp.master, pim_msdp_peer_hold_timer_cb, | |
932 | mp, PIM_MSDP_PEER_HOLD_TIME, &mp->hold_timer); | |
933 | } | |
934 | } | |
935 | ||
936 | ||
937 | /* RFC-3618:Sec-5.5 - peer keepalive timer */ | |
938 | static int pim_msdp_peer_ka_timer_cb(struct thread *t) | |
939 | { | |
940 | struct pim_msdp_peer *mp; | |
941 | ||
942 | mp = THREAD_ARG(t); | |
943 | ||
944 | if (PIM_DEBUG_MSDP_EVENTS) { | |
945 | pim_msdp_peer_timer_expiry_log(mp, "ka"); | |
946 | } | |
947 | ||
948 | pim_msdp_pkt_ka_tx(mp); | |
949 | pim_msdp_peer_ka_timer_setup(mp, true /* start */); | |
950 | return 0; | |
951 | } | |
952 | static void pim_msdp_peer_ka_timer_setup(struct pim_msdp_peer *mp, bool start) | |
953 | { | |
954 | THREAD_OFF(mp->ka_timer); | |
955 | if (start) { | |
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); | |
959 | } | |
960 | } | |
961 | ||
962 | static void pim_msdp_peer_active_connect(struct pim_msdp_peer *mp) | |
963 | { | |
964 | int rc; | |
965 | ++mp->conn_attempts; | |
966 | rc = pim_msdp_sock_connect(mp); | |
967 | ||
968 | if (PIM_DEBUG_MSDP_INTERNAL) { | |
969 | zlog_debug("MSDP peer %s pim_msdp_peer_active_connect: %d", | |
970 | mp->key_str, rc); | |
971 | } | |
972 | ||
973 | switch (rc) { | |
974 | case connect_error: | |
975 | case -1: | |
976 | /* connect failed restart the connect-retry timer */ | |
977 | pim_msdp_peer_cr_timer_setup(mp, true /* start */); | |
978 | break; | |
979 | ||
980 | case connect_success: | |
981 | /* connect was sucessful move to established */ | |
982 | pim_msdp_peer_established(mp); | |
983 | break; | |
984 | ||
985 | case connect_in_progress: | |
986 | /* for NB content we need to wait till sock is readable or | |
987 | * writeable */ | |
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 | |
991 | * connect is | |
992 | * not sucessful */ | |
993 | pim_msdp_peer_cr_timer_setup(mp, true /* start */); | |
994 | break; | |
995 | } | |
996 | } | |
997 | ||
998 | /* RFC-3618:Sec-5.6 - connection retry on active peer */ | |
999 | static int pim_msdp_peer_cr_timer_cb(struct thread *t) | |
1000 | { | |
1001 | struct pim_msdp_peer *mp; | |
1002 | ||
1003 | mp = THREAD_ARG(t); | |
1004 | ||
1005 | if (PIM_DEBUG_MSDP_EVENTS) { | |
1006 | pim_msdp_peer_timer_expiry_log(mp, "connect-retry"); | |
1007 | } | |
1008 | ||
1009 | if (mp->state != PIM_MSDP_CONNECTING || PIM_MSDP_PEER_IS_LISTENER(mp)) { | |
1010 | return 0; | |
1011 | } | |
1012 | ||
1013 | pim_msdp_peer_active_connect(mp); | |
1014 | return 0; | |
1015 | } | |
1016 | static void pim_msdp_peer_cr_timer_setup(struct pim_msdp_peer *mp, bool start) | |
1017 | { | |
1018 | THREAD_OFF(mp->cr_timer); | |
1019 | if (start) { | |
1020 | thread_add_timer( | |
1021 | mp->pim->msdp.master, pim_msdp_peer_cr_timer_cb, mp, | |
1022 | PIM_MSDP_PEER_CONNECT_RETRY_TIME, &mp->cr_timer); | |
1023 | } | |
1024 | } | |
1025 | ||
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) | |
1028 | { | |
1029 | if (mp->state == PIM_MSDP_ESTABLISHED) { | |
1030 | pim_msdp_peer_hold_timer_setup(mp, true /* start */); | |
1031 | } | |
1032 | } | |
1033 | ||
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) | |
1037 | { | |
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", | |
1042 | mp->key_str); | |
1043 | } | |
1044 | } | |
1045 | } | |
1046 | ||
1047 | static void pim_msdp_addr2su(union sockunion *su, struct in_addr addr) | |
1048 | { | |
1049 | sockunion_init(su); | |
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 */ | |
1055 | } | |
1056 | ||
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) | |
1063 | { | |
1064 | struct pim_msdp_peer *mp; | |
1065 | ||
1066 | pim_msdp_enable(pim); | |
1067 | ||
1068 | mp = XCALLOC(MTYPE_PIM_MSDP_PEER, sizeof(*mp)); | |
1069 | ||
1070 | mp->pim = pim; | |
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; | |
1080 | mp->fd = -1; | |
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; | |
1085 | } | |
1086 | ||
1087 | /* setup packet buffers */ | |
1088 | mp->ibuf = stream_new(PIM_MSDP_MAX_PACKET_SIZE); | |
1089 | mp->obuf = stream_fifo_new(); | |
1090 | ||
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); | |
1094 | ||
1095 | if (PIM_DEBUG_MSDP_EVENTS) { | |
1096 | zlog_debug("MSDP peer %s created", mp->key_str); | |
1097 | ||
1098 | pim_msdp_peer_state_chg_log(mp); | |
1099 | } | |
1100 | ||
1101 | /* fireup the connect state machine */ | |
1102 | if (PIM_MSDP_PEER_IS_LISTENER(mp)) { | |
1103 | pim_msdp_peer_listen(mp); | |
1104 | } else { | |
1105 | pim_msdp_peer_connect(mp); | |
1106 | } | |
1107 | if (mp_p) { | |
1108 | *mp_p = mp; | |
1109 | } | |
1110 | return PIM_MSDP_ERR_NONE; | |
1111 | } | |
1112 | ||
1113 | struct pim_msdp_peer *pim_msdp_peer_find(struct pim_instance *pim, | |
1114 | struct in_addr peer_addr) | |
1115 | { | |
1116 | struct pim_msdp_peer lookup; | |
1117 | ||
1118 | lookup.peer = peer_addr; | |
1119 | return hash_lookup(pim->msdp.peer_hash, &lookup); | |
1120 | } | |
1121 | ||
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) | |
1128 | { | |
1129 | struct pim_msdp_peer *mp; | |
1130 | ||
1131 | if (mp_p) { | |
1132 | *mp_p = NULL; | |
1133 | } | |
1134 | ||
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]; | |
1139 | ||
1140 | pim_inet4_dump("<peer?>", peer_addr, peer_str, | |
1141 | sizeof(peer_str)); | |
1142 | zlog_debug("%s add skipped as DIP=SIP", peer_str); | |
1143 | } | |
1144 | return PIM_MSDP_ERR_SIP_EQ_DIP; | |
1145 | } | |
1146 | ||
1147 | mp = pim_msdp_peer_find(pim, peer_addr); | |
1148 | if (mp) { | |
1149 | if (mp_p) { | |
1150 | *mp_p = mp; | |
1151 | } | |
1152 | return PIM_MSDP_ERR_PEER_EXISTS; | |
1153 | } | |
1154 | ||
1155 | return pim_msdp_peer_new(pim, peer_addr, local_addr, mesh_group_name, | |
1156 | mp_p); | |
1157 | } | |
1158 | ||
1159 | /* release all mem associated with a peer */ | |
1160 | static void pim_msdp_peer_free(struct pim_msdp_peer *mp) | |
1161 | { | |
1162 | /* | |
1163 | * Let's make sure we are not running when we delete | |
1164 | * the underlying data structure | |
1165 | */ | |
1166 | pim_msdp_peer_stop_tcp_conn(mp, false); | |
1167 | ||
1168 | if (mp->ibuf) { | |
1169 | stream_free(mp->ibuf); | |
1170 | } | |
1171 | ||
1172 | if (mp->obuf) { | |
1173 | stream_fifo_free(mp->obuf); | |
1174 | } | |
1175 | ||
1176 | if (mp->mesh_group_name) { | |
1177 | XFREE(MTYPE_PIM_MSDP_MG_NAME, mp->mesh_group_name); | |
1178 | } | |
1179 | ||
1180 | mp->pim = NULL; | |
1181 | XFREE(MTYPE_PIM_MSDP_PEER, mp); | |
1182 | } | |
1183 | ||
1184 | /* delete the peer config */ | |
1185 | static enum pim_msdp_err pim_msdp_peer_do_del(struct pim_msdp_peer *mp) | |
1186 | { | |
1187 | /* stop the tcp connection and shutdown all timers */ | |
1188 | pim_msdp_peer_stop_tcp_conn(mp, true /* chg_state */); | |
1189 | ||
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); | |
1193 | ||
1194 | if (PIM_DEBUG_MSDP_EVENTS) { | |
1195 | zlog_debug("MSDP peer %s deleted", mp->key_str); | |
1196 | } | |
1197 | ||
1198 | /* free up any associated memory */ | |
1199 | pim_msdp_peer_free(mp); | |
1200 | ||
1201 | return PIM_MSDP_ERR_NONE; | |
1202 | } | |
1203 | ||
1204 | enum pim_msdp_err pim_msdp_peer_del(struct pim_instance *pim, | |
1205 | struct in_addr peer_addr) | |
1206 | { | |
1207 | struct pim_msdp_peer *mp; | |
1208 | ||
1209 | mp = pim_msdp_peer_find(pim, peer_addr); | |
1210 | if (!mp) { | |
1211 | return PIM_MSDP_ERR_NO_PEER; | |
1212 | } | |
1213 | ||
1214 | return pim_msdp_peer_do_del(mp); | |
1215 | } | |
1216 | ||
1217 | /* peer hash and peer list helpers */ | |
1218 | static unsigned int pim_msdp_peer_hash_key_make(void *p) | |
1219 | { | |
1220 | struct pim_msdp_peer *mp = p; | |
1221 | return (jhash_1word(mp->peer.s_addr, 0)); | |
1222 | } | |
1223 | ||
1224 | static bool pim_msdp_peer_hash_eq(const void *p1, const void *p2) | |
1225 | { | |
1226 | const struct pim_msdp_peer *mp1 = p1; | |
1227 | const struct pim_msdp_peer *mp2 = p2; | |
1228 | ||
1229 | return (mp1->peer.s_addr == mp2->peer.s_addr); | |
1230 | } | |
1231 | ||
1232 | static int pim_msdp_peer_comp(const void *p1, const void *p2) | |
1233 | { | |
1234 | const struct pim_msdp_peer *mp1 = p1; | |
1235 | const struct pim_msdp_peer *mp2 = p2; | |
1236 | ||
1237 | if (ntohl(mp1->peer.s_addr) < ntohl(mp2->peer.s_addr)) | |
1238 | return -1; | |
1239 | ||
1240 | if (ntohl(mp1->peer.s_addr) > ntohl(mp2->peer.s_addr)) | |
1241 | return 1; | |
1242 | ||
1243 | return 0; | |
1244 | } | |
1245 | ||
1246 | /************************** Mesh group management **************************/ | |
1247 | static void pim_msdp_mg_free(struct pim_instance *pim) | |
1248 | { | |
1249 | struct pim_msdp_mg *mg = pim->msdp.mg; | |
1250 | ||
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)) { | |
1253 | return; | |
1254 | } | |
1255 | ||
1256 | if (PIM_DEBUG_MSDP_EVENTS) { | |
1257 | zlog_debug("MSDP mesh-group %s deleted", mg->mesh_group_name); | |
1258 | } | |
1259 | if (mg->mesh_group_name) | |
1260 | XFREE(MTYPE_PIM_MSDP_MG_NAME, mg->mesh_group_name); | |
1261 | ||
1262 | if (mg->mbr_list) | |
1263 | list_delete(&mg->mbr_list); | |
1264 | ||
1265 | XFREE(MTYPE_PIM_MSDP_MG, pim->msdp.mg); | |
1266 | } | |
1267 | ||
1268 | static struct pim_msdp_mg *pim_msdp_mg_new(const char *mesh_group_name) | |
1269 | { | |
1270 | struct pim_msdp_mg *mg; | |
1271 | ||
1272 | mg = XCALLOC(MTYPE_PIM_MSDP_MG, sizeof(*mg)); | |
1273 | ||
1274 | mg->mesh_group_name = XSTRDUP(MTYPE_PIM_MSDP_MG_NAME, mesh_group_name); | |
1275 | mg->mbr_list = list_new(); | |
1276 | mg->mbr_list->del = (void (*)(void *))pim_msdp_mg_mbr_free; | |
1277 | mg->mbr_list->cmp = (int (*)(void *, void *))pim_msdp_mg_mbr_comp; | |
1278 | ||
1279 | if (PIM_DEBUG_MSDP_EVENTS) { | |
1280 | zlog_debug("MSDP mesh-group %s created", mg->mesh_group_name); | |
1281 | } | |
1282 | return mg; | |
1283 | } | |
1284 | ||
1285 | enum pim_msdp_err pim_msdp_mg_del(struct pim_instance *pim, | |
1286 | const char *mesh_group_name) | |
1287 | { | |
1288 | struct pim_msdp_mg *mg = pim->msdp.mg; | |
1289 | struct pim_msdp_mg_mbr *mbr; | |
1290 | ||
1291 | if (!mg || strcmp(mg->mesh_group_name, mesh_group_name)) { | |
1292 | return PIM_MSDP_ERR_NO_MG; | |
1293 | } | |
1294 | ||
1295 | /* delete all the mesh-group members */ | |
1296 | while (!list_isempty(mg->mbr_list)) { | |
1297 | mbr = listnode_head(mg->mbr_list); | |
1298 | pim_msdp_mg_mbr_do_del(mg, mbr); | |
1299 | } | |
1300 | ||
1301 | /* clear src ip */ | |
1302 | mg->src_ip.s_addr = INADDR_ANY; | |
1303 | ||
1304 | /* free up the mesh-group */ | |
1305 | pim_msdp_mg_free(pim); | |
1306 | return PIM_MSDP_ERR_NONE; | |
1307 | } | |
1308 | ||
1309 | static enum pim_msdp_err pim_msdp_mg_add(struct pim_instance *pim, | |
1310 | const char *mesh_group_name) | |
1311 | { | |
1312 | if (pim->msdp.mg) { | |
1313 | if (!strcmp(pim->msdp.mg->mesh_group_name, mesh_group_name)) { | |
1314 | return PIM_MSDP_ERR_NONE; | |
1315 | } | |
1316 | /* currently only one mesh-group can exist at a time */ | |
1317 | return PIM_MSDP_ERR_MAX_MESH_GROUPS; | |
1318 | } | |
1319 | ||
1320 | pim->msdp.mg = pim_msdp_mg_new(mesh_group_name); | |
1321 | if (!pim->msdp.mg) { | |
1322 | return PIM_MSDP_ERR_OOM; | |
1323 | } | |
1324 | ||
1325 | return PIM_MSDP_ERR_NONE; | |
1326 | } | |
1327 | ||
1328 | static int pim_msdp_mg_mbr_comp(const void *p1, const void *p2) | |
1329 | { | |
1330 | const struct pim_msdp_mg_mbr *mbr1 = p1; | |
1331 | const struct pim_msdp_mg_mbr *mbr2 = p2; | |
1332 | ||
1333 | if (ntohl(mbr1->mbr_ip.s_addr) < ntohl(mbr2->mbr_ip.s_addr)) | |
1334 | return -1; | |
1335 | ||
1336 | if (ntohl(mbr1->mbr_ip.s_addr) > ntohl(mbr2->mbr_ip.s_addr)) | |
1337 | return 1; | |
1338 | ||
1339 | return 0; | |
1340 | } | |
1341 | ||
1342 | static void pim_msdp_mg_mbr_free(struct pim_msdp_mg_mbr *mbr) | |
1343 | { | |
1344 | XFREE(MTYPE_PIM_MSDP_MG_MBR, mbr); | |
1345 | } | |
1346 | ||
1347 | static struct pim_msdp_mg_mbr *pim_msdp_mg_mbr_find(struct pim_instance *pim, | |
1348 | struct in_addr mbr_ip) | |
1349 | { | |
1350 | struct pim_msdp_mg_mbr *mbr; | |
1351 | struct listnode *mbr_node; | |
1352 | ||
1353 | if (!pim->msdp.mg) { | |
1354 | return NULL; | |
1355 | } | |
1356 | /* we can move this to a hash but considering that number of peers in | |
1357 | * a mesh-group that seems like bit of an overkill */ | |
1358 | for (ALL_LIST_ELEMENTS_RO(pim->msdp.mg->mbr_list, mbr_node, mbr)) { | |
1359 | if (mbr->mbr_ip.s_addr == mbr_ip.s_addr) { | |
1360 | return mbr; | |
1361 | } | |
1362 | } | |
1363 | return mbr; | |
1364 | } | |
1365 | ||
1366 | enum pim_msdp_err pim_msdp_mg_mbr_add(struct pim_instance *pim, | |
1367 | const char *mesh_group_name, | |
1368 | struct in_addr mbr_ip) | |
1369 | { | |
1370 | int rc; | |
1371 | struct pim_msdp_mg_mbr *mbr; | |
1372 | struct pim_msdp_mg *mg; | |
1373 | ||
1374 | rc = pim_msdp_mg_add(pim, mesh_group_name); | |
1375 | if (rc != PIM_MSDP_ERR_NONE) { | |
1376 | return rc; | |
1377 | } | |
1378 | ||
1379 | mg = pim->msdp.mg; | |
1380 | mbr = pim_msdp_mg_mbr_find(pim, mbr_ip); | |
1381 | if (mbr) { | |
1382 | return PIM_MSDP_ERR_MG_MBR_EXISTS; | |
1383 | } | |
1384 | ||
1385 | mbr = XCALLOC(MTYPE_PIM_MSDP_MG_MBR, sizeof(*mbr)); | |
1386 | mbr->mbr_ip = mbr_ip; | |
1387 | listnode_add_sort(mg->mbr_list, mbr); | |
1388 | ||
1389 | /* if valid SIP has been configured add peer session */ | |
1390 | if (mg->src_ip.s_addr != INADDR_ANY) { | |
1391 | pim_msdp_peer_add(pim, mbr_ip, mg->src_ip, mesh_group_name, | |
1392 | &mbr->mp); | |
1393 | } | |
1394 | ||
1395 | if (PIM_DEBUG_MSDP_EVENTS) { | |
1396 | char ip_str[INET_ADDRSTRLEN]; | |
1397 | pim_inet4_dump("<mbr?>", mbr->mbr_ip, ip_str, sizeof(ip_str)); | |
1398 | zlog_debug("MSDP mesh-group %s mbr %s created", | |
1399 | mg->mesh_group_name, ip_str); | |
1400 | } | |
1401 | ++mg->mbr_cnt; | |
1402 | return PIM_MSDP_ERR_NONE; | |
1403 | } | |
1404 | ||
1405 | static void pim_msdp_mg_mbr_do_del(struct pim_msdp_mg *mg, | |
1406 | struct pim_msdp_mg_mbr *mbr) | |
1407 | { | |
1408 | /* Delete active peer session if any */ | |
1409 | if (mbr->mp) { | |
1410 | pim_msdp_peer_do_del(mbr->mp); | |
1411 | } | |
1412 | ||
1413 | listnode_delete(mg->mbr_list, mbr); | |
1414 | if (PIM_DEBUG_MSDP_EVENTS) { | |
1415 | char ip_str[INET_ADDRSTRLEN]; | |
1416 | pim_inet4_dump("<mbr?>", mbr->mbr_ip, ip_str, sizeof(ip_str)); | |
1417 | zlog_debug("MSDP mesh-group %s mbr %s deleted", | |
1418 | mg->mesh_group_name, ip_str); | |
1419 | } | |
1420 | pim_msdp_mg_mbr_free(mbr); | |
1421 | if (mg->mbr_cnt) { | |
1422 | --mg->mbr_cnt; | |
1423 | } | |
1424 | } | |
1425 | ||
1426 | enum pim_msdp_err pim_msdp_mg_mbr_del(struct pim_instance *pim, | |
1427 | const char *mesh_group_name, | |
1428 | struct in_addr mbr_ip) | |
1429 | { | |
1430 | struct pim_msdp_mg_mbr *mbr; | |
1431 | struct pim_msdp_mg *mg = pim->msdp.mg; | |
1432 | ||
1433 | if (!mg || strcmp(mg->mesh_group_name, mesh_group_name)) { | |
1434 | return PIM_MSDP_ERR_NO_MG; | |
1435 | } | |
1436 | ||
1437 | mbr = pim_msdp_mg_mbr_find(pim, mbr_ip); | |
1438 | if (!mbr) { | |
1439 | return PIM_MSDP_ERR_NO_MG_MBR; | |
1440 | } | |
1441 | ||
1442 | pim_msdp_mg_mbr_do_del(mg, mbr); | |
1443 | /* if there are no references to the mg free it */ | |
1444 | pim_msdp_mg_free(pim); | |
1445 | ||
1446 | return PIM_MSDP_ERR_NONE; | |
1447 | } | |
1448 | ||
1449 | static void pim_msdp_mg_src_do_del(struct pim_instance *pim) | |
1450 | { | |
1451 | struct pim_msdp_mg_mbr *mbr; | |
1452 | struct listnode *mbr_node; | |
1453 | struct pim_msdp_mg *mg = pim->msdp.mg; | |
1454 | ||
1455 | /* SIP is being removed - tear down all active peer sessions */ | |
1456 | for (ALL_LIST_ELEMENTS_RO(mg->mbr_list, mbr_node, mbr)) { | |
1457 | if (mbr->mp) { | |
1458 | pim_msdp_peer_do_del(mbr->mp); | |
1459 | mbr->mp = NULL; | |
1460 | } | |
1461 | } | |
1462 | if (PIM_DEBUG_MSDP_EVENTS) { | |
1463 | zlog_debug("MSDP mesh-group %s src cleared", | |
1464 | mg->mesh_group_name); | |
1465 | } | |
1466 | } | |
1467 | ||
1468 | enum pim_msdp_err pim_msdp_mg_src_del(struct pim_instance *pim, | |
1469 | const char *mesh_group_name) | |
1470 | { | |
1471 | struct pim_msdp_mg *mg = pim->msdp.mg; | |
1472 | ||
1473 | if (!mg || strcmp(mg->mesh_group_name, mesh_group_name)) { | |
1474 | return PIM_MSDP_ERR_NO_MG; | |
1475 | } | |
1476 | ||
1477 | if (mg->src_ip.s_addr != INADDR_ANY) { | |
1478 | mg->src_ip.s_addr = INADDR_ANY; | |
1479 | pim_msdp_mg_src_do_del(pim); | |
1480 | /* if there are no references to the mg free it */ | |
1481 | pim_msdp_mg_free(pim); | |
1482 | } | |
1483 | return PIM_MSDP_ERR_NONE; | |
1484 | } | |
1485 | ||
1486 | enum pim_msdp_err pim_msdp_mg_src_add(struct pim_instance *pim, | |
1487 | const char *mesh_group_name, | |
1488 | struct in_addr src_ip) | |
1489 | { | |
1490 | int rc; | |
1491 | struct pim_msdp_mg_mbr *mbr; | |
1492 | struct listnode *mbr_node; | |
1493 | struct pim_msdp_mg *mg; | |
1494 | ||
1495 | if (src_ip.s_addr == INADDR_ANY) { | |
1496 | pim_msdp_mg_src_del(pim, mesh_group_name); | |
1497 | return PIM_MSDP_ERR_NONE; | |
1498 | } | |
1499 | ||
1500 | rc = pim_msdp_mg_add(pim, mesh_group_name); | |
1501 | if (rc != PIM_MSDP_ERR_NONE) { | |
1502 | return rc; | |
1503 | } | |
1504 | ||
1505 | mg = pim->msdp.mg; | |
1506 | if (mg->src_ip.s_addr != INADDR_ANY) { | |
1507 | pim_msdp_mg_src_do_del(pim); | |
1508 | } | |
1509 | mg->src_ip = src_ip; | |
1510 | ||
1511 | for (ALL_LIST_ELEMENTS_RO(mg->mbr_list, mbr_node, mbr)) { | |
1512 | pim_msdp_peer_add(pim, mbr->mbr_ip, mg->src_ip, mesh_group_name, | |
1513 | &mbr->mp); | |
1514 | } | |
1515 | ||
1516 | if (PIM_DEBUG_MSDP_EVENTS) { | |
1517 | char ip_str[INET_ADDRSTRLEN]; | |
1518 | pim_inet4_dump("<src?>", mg->src_ip, ip_str, sizeof(ip_str)); | |
1519 | zlog_debug("MSDP mesh-group %s src %s set", mg->mesh_group_name, | |
1520 | ip_str); | |
1521 | } | |
1522 | return PIM_MSDP_ERR_NONE; | |
1523 | } | |
1524 | ||
1525 | /*********************** MSDP feature APIs *********************************/ | |
1526 | int pim_msdp_config_write_helper(struct pim_instance *pim, struct vty *vty, | |
1527 | const char *spaces) | |
1528 | { | |
1529 | struct listnode *mbrnode; | |
1530 | struct pim_msdp_mg_mbr *mbr; | |
1531 | struct pim_msdp_mg *mg = pim->msdp.mg; | |
1532 | char mbr_str[INET_ADDRSTRLEN]; | |
1533 | char src_str[INET_ADDRSTRLEN]; | |
1534 | int count = 0; | |
1535 | ||
1536 | if (!mg) { | |
1537 | return count; | |
1538 | } | |
1539 | ||
1540 | if (mg->src_ip.s_addr != INADDR_ANY) { | |
1541 | pim_inet4_dump("<src?>", mg->src_ip, src_str, sizeof(src_str)); | |
1542 | vty_out(vty, "%sip msdp mesh-group %s source %s\n", spaces, | |
1543 | mg->mesh_group_name, src_str); | |
1544 | ++count; | |
1545 | } | |
1546 | ||
1547 | for (ALL_LIST_ELEMENTS_RO(mg->mbr_list, mbrnode, mbr)) { | |
1548 | pim_inet4_dump("<mbr?>", mbr->mbr_ip, mbr_str, sizeof(mbr_str)); | |
1549 | vty_out(vty, "%sip msdp mesh-group %s member %s\n", spaces, | |
1550 | mg->mesh_group_name, mbr_str); | |
1551 | ++count; | |
1552 | } | |
1553 | return count; | |
1554 | } | |
1555 | ||
1556 | int pim_msdp_config_write(struct vty *vty) | |
1557 | { | |
1558 | return pim_msdp_config_write_helper(pimg, vty, ""); | |
1559 | } | |
1560 | ||
1561 | /* Enable feature including active/periodic timers etc. on the first peer | |
1562 | * config. Till then MSDP should just stay quiet. */ | |
1563 | static void pim_msdp_enable(struct pim_instance *pim) | |
1564 | { | |
1565 | if (pim->msdp.flags & PIM_MSDPF_ENABLE) { | |
1566 | /* feature is already enabled */ | |
1567 | return; | |
1568 | } | |
1569 | pim->msdp.flags |= PIM_MSDPF_ENABLE; | |
1570 | pim->msdp.work_obuf = stream_new(PIM_MSDP_MAX_PACKET_SIZE); | |
1571 | pim_msdp_sa_adv_timer_setup(pim, true /* start */); | |
1572 | /* setup sa cache based on local sources */ | |
1573 | pim_msdp_sa_local_setup(pim); | |
1574 | } | |
1575 | ||
1576 | /* MSDP init */ | |
1577 | void pim_msdp_init(struct pim_instance *pim, struct thread_master *master) | |
1578 | { | |
1579 | pim->msdp.master = master; | |
1580 | char hash_name[64]; | |
1581 | ||
1582 | snprintf(hash_name, 64, "PIM %s MSDP Peer Hash", pim->vrf->name); | |
1583 | pim->msdp.peer_hash = hash_create(pim_msdp_peer_hash_key_make, | |
1584 | pim_msdp_peer_hash_eq, hash_name); | |
1585 | pim->msdp.peer_list = list_new(); | |
1586 | pim->msdp.peer_list->del = (void (*)(void *))pim_msdp_peer_free; | |
1587 | pim->msdp.peer_list->cmp = (int (*)(void *, void *))pim_msdp_peer_comp; | |
1588 | ||
1589 | snprintf(hash_name, 64, "PIM %s MSDP SA Hash", pim->vrf->name); | |
1590 | pim->msdp.sa_hash = hash_create(pim_msdp_sa_hash_key_make, | |
1591 | pim_msdp_sa_hash_eq, hash_name); | |
1592 | pim->msdp.sa_list = list_new(); | |
1593 | pim->msdp.sa_list->del = (void (*)(void *))pim_msdp_sa_free; | |
1594 | pim->msdp.sa_list->cmp = (int (*)(void *, void *))pim_msdp_sa_comp; | |
1595 | } | |
1596 | ||
1597 | /* counterpart to MSDP init; XXX: unused currently */ | |
1598 | void pim_msdp_exit(struct pim_instance *pim) | |
1599 | { | |
1600 | pim_msdp_sa_adv_timer_setup(pim, false); | |
1601 | ||
1602 | /* XXX: stop listener and delete all peer sessions */ | |
1603 | ||
1604 | pim_msdp_mg_free(pim); | |
1605 | ||
1606 | if (pim->msdp.peer_hash) { | |
1607 | hash_clean(pim->msdp.peer_hash, NULL); | |
1608 | hash_free(pim->msdp.peer_hash); | |
1609 | pim->msdp.peer_hash = NULL; | |
1610 | } | |
1611 | ||
1612 | if (pim->msdp.peer_list) { | |
1613 | list_delete(&pim->msdp.peer_list); | |
1614 | } | |
1615 | ||
1616 | if (pim->msdp.sa_hash) { | |
1617 | hash_clean(pim->msdp.sa_hash, NULL); | |
1618 | hash_free(pim->msdp.sa_hash); | |
1619 | pim->msdp.sa_hash = NULL; | |
1620 | } | |
1621 | ||
1622 | if (pim->msdp.sa_list) { | |
1623 | list_delete(&pim->msdp.sa_list); | |
1624 | } | |
1625 | ||
1626 | if (pim->msdp.work_obuf) | |
1627 | stream_free(pim->msdp.work_obuf); | |
1628 | pim->msdp.work_obuf = NULL; | |
1629 | } |