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11128587 | 1 | /* |
2a333e0f | 2 | * IP MSDP for Quagga |
11128587 | 3 | * Copyright (C) 2016 Cumulus Networks, Inc. |
11128587 DS |
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 | * | |
896014f4 DL |
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 | |
11128587 DS |
18 | */ |
19 | ||
20 | #include <zebra.h> | |
21 | ||
2a333e0f | 22 | #include <lib/hash.h> |
23 | #include <lib/jhash.h> | |
24 | #include <lib/log.h> | |
3c72d654 | 25 | #include <lib/prefix.h> |
2a333e0f | 26 | #include <lib/sockunion.h> |
27 | #include <lib/stream.h> | |
28 | #include <lib/thread.h> | |
3c72d654 | 29 | #include <lib/vty.h> |
30 | #include <lib/plist.h> | |
3613d898 | 31 | #include <lib/lib_errors.h> |
11128587 | 32 | |
2a333e0f | 33 | #include "pimd.h" |
2a333e0f | 34 | #include "pim_memory.h" |
7176984f | 35 | #include "pim_iface.h" |
3c72d654 | 36 | #include "pim_rp.h" |
2a333e0f | 37 | #include "pim_str.h" |
38 | #include "pim_time.h" | |
1bf16443 | 39 | #include "pim_upstream.h" |
472ad383 | 40 | #include "pim_oil.h" |
11128587 | 41 | |
2a333e0f | 42 | #include "pim_msdp.h" |
43 | #include "pim_msdp_packet.h" | |
44 | #include "pim_msdp_socket.h" | |
45 | ||
2ad78035 | 46 | // struct pim_msdp pim_msdp, *msdp = &pim_msdp; |
2a333e0f | 47 | |
48 | static void pim_msdp_peer_listen(struct pim_msdp_peer *mp); | |
49 | static void pim_msdp_peer_cr_timer_setup(struct pim_msdp_peer *mp, bool start); | |
50 | static void pim_msdp_peer_ka_timer_setup(struct pim_msdp_peer *mp, bool start); | |
d62a17ae | 51 | static void pim_msdp_peer_hold_timer_setup(struct pim_msdp_peer *mp, |
52 | bool start); | |
2a333e0f | 53 | static void pim_msdp_peer_free(struct pim_msdp_peer *mp); |
472ad383 DS |
54 | static void pim_msdp_enable(struct pim_instance *pim); |
55 | static void pim_msdp_sa_adv_timer_setup(struct pim_instance *pim, bool start); | |
d62a17ae | 56 | static void pim_msdp_sa_deref(struct pim_msdp_sa *sa, |
57 | enum pim_msdp_sa_flags flags); | |
977d71cc | 58 | static int pim_msdp_mg_mbr_comp(const void *p1, const void *p2); |
59 | static void pim_msdp_mg_mbr_free(struct pim_msdp_mg_mbr *mbr); | |
2a333e0f | 60 | |
3c72d654 | 61 | /************************ SA cache management ******************************/ |
d62a17ae | 62 | static void pim_msdp_sa_timer_expiry_log(struct pim_msdp_sa *sa, |
63 | const char *timer_str) | |
3c72d654 | 64 | { |
d62a17ae | 65 | zlog_debug("MSDP SA %s %s timer expired", sa->sg_str, timer_str); |
3c72d654 | 66 | } |
67 | ||
68 | /* RFC-3618:Sec-5.1 - global active source advertisement timer */ | |
cc9f21da | 69 | static void pim_msdp_sa_adv_timer_cb(struct thread *t) |
3c72d654 | 70 | { |
472ad383 DS |
71 | struct pim_instance *pim = THREAD_ARG(t); |
72 | ||
d62a17ae | 73 | if (PIM_DEBUG_MSDP_EVENTS) { |
0437e105 | 74 | zlog_debug("MSDP SA advertisement timer expired"); |
d62a17ae | 75 | } |
3c72d654 | 76 | |
472ad383 DS |
77 | pim_msdp_sa_adv_timer_setup(pim, true /* start */); |
78 | pim_msdp_pkt_sa_tx(pim); | |
3c72d654 | 79 | } |
cc9f21da | 80 | |
472ad383 | 81 | static void pim_msdp_sa_adv_timer_setup(struct pim_instance *pim, bool start) |
3c72d654 | 82 | { |
472ad383 | 83 | THREAD_OFF(pim->msdp.sa_adv_timer); |
d62a17ae | 84 | if (start) { |
472ad383 DS |
85 | thread_add_timer(pim->msdp.master, pim_msdp_sa_adv_timer_cb, |
86 | pim, PIM_MSDP_SA_ADVERTISMENT_TIME, | |
87 | &pim->msdp.sa_adv_timer); | |
d62a17ae | 88 | } |
3c72d654 | 89 | } |
90 | ||
91 | /* RFC-3618:Sec-5.3 - SA cache state timer */ | |
cc9f21da | 92 | static void pim_msdp_sa_state_timer_cb(struct thread *t) |
3c72d654 | 93 | { |
d62a17ae | 94 | struct pim_msdp_sa *sa; |
3c72d654 | 95 | |
d62a17ae | 96 | sa = THREAD_ARG(t); |
3c72d654 | 97 | |
d62a17ae | 98 | if (PIM_DEBUG_MSDP_EVENTS) { |
99 | pim_msdp_sa_timer_expiry_log(sa, "state"); | |
100 | } | |
3c72d654 | 101 | |
d62a17ae | 102 | pim_msdp_sa_deref(sa, PIM_MSDP_SAF_PEER); |
3c72d654 | 103 | } |
cc9f21da | 104 | |
d62a17ae | 105 | static void pim_msdp_sa_state_timer_setup(struct pim_msdp_sa *sa, bool start) |
3c72d654 | 106 | { |
d62a17ae | 107 | THREAD_OFF(sa->sa_state_timer); |
108 | if (start) { | |
472ad383 DS |
109 | thread_add_timer(sa->pim->msdp.master, |
110 | pim_msdp_sa_state_timer_cb, sa, | |
111 | PIM_MSDP_SA_HOLD_TIME, &sa->sa_state_timer); | |
d62a17ae | 112 | } |
3c72d654 | 113 | } |
114 | ||
d62a17ae | 115 | static void pim_msdp_sa_upstream_del(struct pim_msdp_sa *sa) |
7667c556 | 116 | { |
d62a17ae | 117 | struct pim_upstream *up = sa->up; |
118 | if (!up) { | |
119 | return; | |
120 | } | |
7667c556 | 121 | |
d62a17ae | 122 | sa->up = NULL; |
123 | if (PIM_UPSTREAM_FLAG_TEST_SRC_MSDP(up->flags)) { | |
124 | PIM_UPSTREAM_FLAG_UNSET_SRC_MSDP(up->flags); | |
125 | sa->flags |= PIM_MSDP_SAF_UP_DEL_IN_PROG; | |
15569c58 | 126 | up = pim_upstream_del(sa->pim, up, __func__); |
41a115e4 AK |
127 | /* re-eval joinDesired; clearing peer-msdp-sa flag can |
128 | * cause JD to change | |
129 | */ | |
130 | if (up) | |
131 | pim_upstream_update_join_desired(sa->pim, up); | |
d62a17ae | 132 | sa->flags &= ~PIM_MSDP_SAF_UP_DEL_IN_PROG; |
133 | } | |
7667c556 | 134 | |
d62a17ae | 135 | if (PIM_DEBUG_MSDP_EVENTS) { |
136 | zlog_debug("MSDP SA %s de-referenced SPT", sa->sg_str); | |
137 | } | |
7667c556 | 138 | } |
139 | ||
d62a17ae | 140 | static bool pim_msdp_sa_upstream_add_ok(struct pim_msdp_sa *sa, |
141 | struct pim_upstream *xg_up) | |
7667c556 | 142 | { |
d62a17ae | 143 | if (!(sa->flags & PIM_MSDP_SAF_PEER)) { |
144 | /* SA should have been rxed from a peer */ | |
145 | return false; | |
146 | } | |
147 | /* check if we are RP */ | |
472ad383 | 148 | if (!I_am_RP(sa->pim, sa->sg.grp)) { |
d62a17ae | 149 | return false; |
150 | } | |
7667c556 | 151 | |
d62a17ae | 152 | /* check if we have a (*, G) with a non-empty immediate OIL */ |
153 | if (!xg_up) { | |
6fff2cc6 | 154 | pim_sgaddr sg; |
7667c556 | 155 | |
d62a17ae | 156 | memset(&sg, 0, sizeof(sg)); |
157 | sg.grp = sa->sg.grp; | |
7667c556 | 158 | |
472ad383 | 159 | xg_up = pim_upstream_find(sa->pim, &sg); |
d62a17ae | 160 | } |
161 | if (!xg_up || (xg_up->join_state != PIM_UPSTREAM_JOINED)) { | |
162 | /* join desired will be true for such (*, G) entries so we will | |
163 | * just look at join_state and let the PIM state machine do the | |
164 | * rest of | |
165 | * the magic */ | |
166 | return false; | |
167 | } | |
7667c556 | 168 | |
d62a17ae | 169 | return true; |
7667c556 | 170 | } |
171 | ||
172 | /* Upstream add evaluation needs to happen everytime - | |
173 | * 1. Peer reference is added or removed. | |
1bf16443 | 174 | * 2. The RP for a group changes. |
175 | * 3. joinDesired for the associated (*, G) changes | |
176 | * 4. associated (*, G) is removed - this seems like a bit redundant | |
7667c556 | 177 | * (considering #4); but just in case an entry gets nuked without |
178 | * upstream state transition | |
179 | * */ | |
d62a17ae | 180 | static void pim_msdp_sa_upstream_update(struct pim_msdp_sa *sa, |
181 | struct pim_upstream *xg_up, | |
182 | const char *ctx) | |
183 | { | |
184 | struct pim_upstream *up; | |
185 | ||
186 | if (!pim_msdp_sa_upstream_add_ok(sa, xg_up)) { | |
187 | pim_msdp_sa_upstream_del(sa); | |
188 | return; | |
189 | } | |
190 | ||
191 | if (sa->up) { | |
192 | /* nothing to do */ | |
193 | return; | |
194 | } | |
195 | ||
472ad383 | 196 | up = pim_upstream_find(sa->pim, &sa->sg); |
d62a17ae | 197 | if (up && (PIM_UPSTREAM_FLAG_TEST_SRC_MSDP(up->flags))) { |
198 | /* somehow we lost track of the upstream ptr? best log it */ | |
199 | sa->up = up; | |
200 | if (PIM_DEBUG_MSDP_EVENTS) { | |
201 | zlog_debug("MSDP SA %s SPT reference missing", | |
202 | sa->sg_str); | |
203 | } | |
204 | return; | |
205 | } | |
206 | ||
207 | /* RFC3618: "RP triggers a (S, G) join event towards the data source | |
208 | * as if a JP message was rxed addressed to the RP itself." */ | |
2002dcdb | 209 | up = pim_upstream_add(sa->pim, &sa->sg, NULL /* iif */, |
15569c58 | 210 | PIM_UPSTREAM_FLAG_MASK_SRC_MSDP, __func__, NULL); |
d62a17ae | 211 | |
212 | sa->up = up; | |
213 | if (up) { | |
214 | /* update inherited oil */ | |
472ad383 | 215 | pim_upstream_inherited_olist(sa->pim, up); |
d62a17ae | 216 | /* should we also start the kat in parallel? we will need it |
217 | * when the | |
218 | * SA ages out */ | |
219 | if (PIM_DEBUG_MSDP_EVENTS) { | |
220 | zlog_debug("MSDP SA %s referenced SPT", sa->sg_str); | |
221 | } | |
222 | } else { | |
223 | if (PIM_DEBUG_MSDP_EVENTS) { | |
224 | zlog_debug("MSDP SA %s SPT reference failed", | |
225 | sa->sg_str); | |
226 | } | |
227 | } | |
7667c556 | 228 | } |
229 | ||
3c72d654 | 230 | /* release all mem associated with a sa */ |
d62a17ae | 231 | static void pim_msdp_sa_free(struct pim_msdp_sa *sa) |
3c72d654 | 232 | { |
ec2f0e53 DS |
233 | pim_msdp_sa_state_timer_setup(sa, false); |
234 | ||
d62a17ae | 235 | XFREE(MTYPE_PIM_MSDP_SA, sa); |
3c72d654 | 236 | } |
237 | ||
472ad383 | 238 | static struct pim_msdp_sa *pim_msdp_sa_new(struct pim_instance *pim, |
6fff2cc6 | 239 | pim_sgaddr *sg, struct in_addr rp) |
3c72d654 | 240 | { |
d62a17ae | 241 | struct pim_msdp_sa *sa; |
3c72d654 | 242 | |
d62a17ae | 243 | sa = XCALLOC(MTYPE_PIM_MSDP_SA, sizeof(*sa)); |
3c72d654 | 244 | |
472ad383 | 245 | sa->pim = pim; |
d62a17ae | 246 | sa->sg = *sg; |
9bace5c2 | 247 | snprintfrr(sa->sg_str, sizeof(sa->sg_str), "%pSG", sg); |
d62a17ae | 248 | sa->rp = rp; |
249 | sa->uptime = pim_time_monotonic_sec(); | |
3c72d654 | 250 | |
d62a17ae | 251 | /* insert into misc tables for easy access */ |
472ad383 | 252 | sa = hash_get(pim->msdp.sa_hash, sa, hash_alloc_intern); |
472ad383 | 253 | listnode_add_sort(pim->msdp.sa_list, sa); |
3c72d654 | 254 | |
d62a17ae | 255 | if (PIM_DEBUG_MSDP_EVENTS) { |
256 | zlog_debug("MSDP SA %s created", sa->sg_str); | |
257 | } | |
3c72d654 | 258 | |
d62a17ae | 259 | return sa; |
3c72d654 | 260 | } |
261 | ||
472ad383 | 262 | static struct pim_msdp_sa *pim_msdp_sa_find(struct pim_instance *pim, |
6fff2cc6 | 263 | pim_sgaddr *sg) |
3c72d654 | 264 | { |
d62a17ae | 265 | struct pim_msdp_sa lookup; |
3c72d654 | 266 | |
d62a17ae | 267 | lookup.sg = *sg; |
472ad383 | 268 | return hash_lookup(pim->msdp.sa_hash, &lookup); |
3c72d654 | 269 | } |
270 | ||
472ad383 | 271 | static struct pim_msdp_sa *pim_msdp_sa_add(struct pim_instance *pim, |
6fff2cc6 | 272 | pim_sgaddr *sg, struct in_addr rp) |
3c72d654 | 273 | { |
d62a17ae | 274 | struct pim_msdp_sa *sa; |
3c72d654 | 275 | |
472ad383 | 276 | sa = pim_msdp_sa_find(pim, sg); |
d62a17ae | 277 | if (sa) { |
278 | return sa; | |
279 | } | |
3c72d654 | 280 | |
472ad383 | 281 | return pim_msdp_sa_new(pim, sg, rp); |
3c72d654 | 282 | } |
283 | ||
d62a17ae | 284 | static void pim_msdp_sa_del(struct pim_msdp_sa *sa) |
3c72d654 | 285 | { |
d62a17ae | 286 | /* this is somewhat redundant - still want to be careful not to leave |
287 | * stale upstream references */ | |
288 | pim_msdp_sa_upstream_del(sa); | |
7667c556 | 289 | |
d62a17ae | 290 | /* stop timers */ |
291 | pim_msdp_sa_state_timer_setup(sa, false /* start */); | |
3c72d654 | 292 | |
d62a17ae | 293 | /* remove the entry from various tables */ |
472ad383 DS |
294 | listnode_delete(sa->pim->msdp.sa_list, sa); |
295 | hash_release(sa->pim->msdp.sa_hash, sa); | |
3c72d654 | 296 | |
d62a17ae | 297 | if (PIM_DEBUG_MSDP_EVENTS) { |
298 | zlog_debug("MSDP SA %s deleted", sa->sg_str); | |
299 | } | |
3c72d654 | 300 | |
d62a17ae | 301 | /* free up any associated memory */ |
302 | pim_msdp_sa_free(sa); | |
3c72d654 | 303 | } |
304 | ||
d62a17ae | 305 | static void pim_msdp_sa_peer_ip_set(struct pim_msdp_sa *sa, |
306 | struct pim_msdp_peer *mp, struct in_addr rp) | |
15ad0c71 | 307 | { |
d62a17ae | 308 | struct pim_msdp_peer *old_mp; |
15ad0c71 | 309 | |
d62a17ae | 310 | /* optimize the "no change" case as it will happen |
311 | * frequently/periodically */ | |
312 | if (mp && (sa->peer.s_addr == mp->peer.s_addr)) { | |
313 | return; | |
314 | } | |
15ad0c71 | 315 | |
d62a17ae | 316 | /* any time the peer ip changes also update the rp address */ |
3ca68c9c | 317 | if (sa->peer.s_addr != INADDR_ANY) { |
472ad383 | 318 | old_mp = pim_msdp_peer_find(sa->pim, sa->peer); |
d62a17ae | 319 | if (old_mp && old_mp->sa_cnt) { |
320 | --old_mp->sa_cnt; | |
321 | } | |
322 | } | |
15ad0c71 | 323 | |
d62a17ae | 324 | if (mp) { |
325 | ++mp->sa_cnt; | |
326 | sa->peer = mp->peer; | |
327 | } else { | |
328 | sa->peer.s_addr = PIM_NET_INADDR_ANY; | |
329 | } | |
330 | sa->rp = rp; | |
15ad0c71 | 331 | } |
332 | ||
3c72d654 | 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 | |
336 | * SA. | |
337 | * Similarly a "peer-added" SA is never explicitly deleted. It is simply | |
d62a17ae | 338 | * aged out overtime if not seen in the SA updates from the peers. |
3c72d654 | 339 | * XXX: should we provide a knob to drop entries learnt from a peer when the |
340 | * peer goes down? */ | |
d62a17ae | 341 | static void pim_msdp_sa_deref(struct pim_msdp_sa *sa, |
342 | enum pim_msdp_sa_flags flags) | |
343 | { | |
344 | bool update_up = false; | |
345 | ||
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", | |
350 | sa->sg_str); | |
351 | } | |
472ad383 DS |
352 | if (sa->pim->msdp.local_cnt) |
353 | --sa->pim->msdp.local_cnt; | |
d62a17ae | 354 | } |
355 | } | |
356 | ||
357 | if ((sa->flags & PIM_MSDP_SAF_PEER)) { | |
358 | if (flags & PIM_MSDP_SAF_PEER) { | |
359 | struct in_addr rp; | |
360 | ||
361 | if (PIM_DEBUG_MSDP_EVENTS) { | |
362 | zlog_debug("MSDP SA %s peer reference removed", | |
363 | sa->sg_str); | |
364 | } | |
365 | pim_msdp_sa_state_timer_setup(sa, false /* start */); | |
366 | rp.s_addr = INADDR_ANY; | |
367 | pim_msdp_sa_peer_ip_set(sa, NULL /* mp */, rp); | |
368 | /* if peer ref was removed we need to remove the msdp | |
369 | * reference on the | |
370 | * msdp entry */ | |
371 | update_up = true; | |
372 | } | |
373 | } | |
374 | ||
375 | sa->flags &= ~flags; | |
376 | if (update_up) { | |
377 | pim_msdp_sa_upstream_update(sa, NULL /* xg_up */, "sa-deref"); | |
378 | } | |
379 | ||
380 | if (!(sa->flags & PIM_MSDP_SAF_REF)) { | |
381 | pim_msdp_sa_del(sa); | |
382 | } | |
383 | } | |
384 | ||
472ad383 | 385 | void pim_msdp_sa_ref(struct pim_instance *pim, struct pim_msdp_peer *mp, |
6fff2cc6 | 386 | pim_sgaddr *sg, struct in_addr rp) |
d62a17ae | 387 | { |
388 | struct pim_msdp_sa *sa; | |
389 | ||
472ad383 | 390 | sa = pim_msdp_sa_add(pim, sg, rp); |
d62a17ae | 391 | if (!sa) { |
392 | return; | |
393 | } | |
394 | ||
395 | /* reference it */ | |
396 | if (mp) { | |
397 | if (!(sa->flags & PIM_MSDP_SAF_PEER)) { | |
398 | sa->flags |= PIM_MSDP_SAF_PEER; | |
399 | if (PIM_DEBUG_MSDP_EVENTS) { | |
400 | zlog_debug("MSDP SA %s added by peer", | |
401 | sa->sg_str); | |
402 | } | |
403 | } | |
404 | pim_msdp_sa_peer_ip_set(sa, mp, rp); | |
405 | /* start/re-start the state timer to prevent cache expiry */ | |
406 | pim_msdp_sa_state_timer_setup(sa, true /* start */); | |
407 | /* We re-evaluate SA "SPT-trigger" everytime we hear abt it from | |
408 | * a | |
409 | * peer. XXX: If this becomes too much of a periodic overhead we | |
410 | * can make it event based */ | |
411 | pim_msdp_sa_upstream_update(sa, NULL /* xg_up */, "peer-ref"); | |
412 | } else { | |
413 | if (!(sa->flags & PIM_MSDP_SAF_LOCAL)) { | |
414 | sa->flags |= PIM_MSDP_SAF_LOCAL; | |
472ad383 | 415 | ++sa->pim->msdp.local_cnt; |
d62a17ae | 416 | if (PIM_DEBUG_MSDP_EVENTS) { |
417 | zlog_debug("MSDP SA %s added locally", | |
418 | sa->sg_str); | |
419 | } | |
420 | /* send an immediate SA update to peers */ | |
9fbd9fc4 | 421 | sa->rp = pim->msdp.originator_id; |
d62a17ae | 422 | pim_msdp_pkt_sa_tx_one(sa); |
423 | } | |
424 | sa->flags &= ~PIM_MSDP_SAF_STALE; | |
425 | } | |
3c72d654 | 426 | } |
427 | ||
1bf16443 | 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 | */ | |
d62a17ae | 440 | static bool pim_msdp_sa_local_add_ok(struct pim_upstream *up) |
3c72d654 | 441 | { |
472ad383 DS |
442 | struct pim_instance *pim = up->channel_oil->pim; |
443 | ||
444 | if (!(pim->msdp.flags & PIM_MSDPF_ENABLE)) { | |
d62a17ae | 445 | return false; |
446 | } | |
3c72d654 | 447 | |
ec836533 | 448 | if (!pim_upstream_is_kat_running(up)) |
d62a17ae | 449 | /* stream is not active */ |
450 | return false; | |
1bf16443 | 451 | |
472ad383 | 452 | if (!I_am_RP(pim, up->sg.grp)) { |
d62a17ae | 453 | /* we are not RP for the group */ |
454 | return false; | |
455 | } | |
1bf16443 | 456 | |
d62a17ae | 457 | /* we are the FHR-DR for this stream or we are RP and have seen |
458 | * registers | |
459 | * from a FHR for this source */ | |
460 | if (PIM_UPSTREAM_FLAG_TEST_FHR(up->flags) || up->t_msdp_reg_timer) { | |
461 | return true; | |
462 | } | |
1bf16443 | 463 | |
d62a17ae | 464 | return false; |
1bf16443 | 465 | } |
466 | ||
6fff2cc6 | 467 | static void pim_msdp_sa_local_add(struct pim_instance *pim, pim_sgaddr *sg) |
1bf16443 | 468 | { |
d62a17ae | 469 | struct in_addr rp; |
975a328e | 470 | rp.s_addr = INADDR_ANY; |
472ad383 | 471 | pim_msdp_sa_ref(pim, NULL /* mp */, sg, rp); |
3c72d654 | 472 | } |
473 | ||
6fff2cc6 | 474 | void pim_msdp_sa_local_del(struct pim_instance *pim, pim_sgaddr *sg) |
3c72d654 | 475 | { |
d62a17ae | 476 | struct pim_msdp_sa *sa; |
3c72d654 | 477 | |
472ad383 | 478 | sa = pim_msdp_sa_find(pim, sg); |
d62a17ae | 479 | if (sa) { |
480 | pim_msdp_sa_deref(sa, PIM_MSDP_SAF_LOCAL); | |
481 | } | |
3c72d654 | 482 | } |
483 | ||
36e466fe | 484 | /* we need to be very cautious with this API as SA del too can trigger an |
485 | * upstream del and we will get stuck in a simple loop */ | |
472ad383 | 486 | static void pim_msdp_sa_local_del_on_up_del(struct pim_instance *pim, |
6fff2cc6 | 487 | pim_sgaddr *sg) |
d62a17ae | 488 | { |
489 | struct pim_msdp_sa *sa; | |
490 | ||
472ad383 | 491 | sa = pim_msdp_sa_find(pim, sg); |
d62a17ae | 492 | if (sa) { |
493 | if (PIM_DEBUG_MSDP_INTERNAL) { | |
494 | zlog_debug("MSDP local sa %s del on up del", | |
495 | sa->sg_str); | |
496 | } | |
497 | ||
498 | /* if there is no local reference escape */ | |
499 | if (!(sa->flags & PIM_MSDP_SAF_LOCAL)) { | |
500 | if (PIM_DEBUG_MSDP_INTERNAL) { | |
501 | zlog_debug("MSDP local sa %s del; no local ref", | |
502 | sa->sg_str); | |
503 | } | |
504 | return; | |
505 | } | |
506 | ||
507 | if (sa->flags & PIM_MSDP_SAF_UP_DEL_IN_PROG) { | |
508 | /* MSDP is the one that triggered the upstream del. if | |
509 | * this happens | |
510 | * we most certainly have a bug in the PIM upstream | |
511 | * state machine. We | |
512 | * will not have a local reference unless the KAT is | |
513 | * running. And if the | |
514 | * KAT is running there MUST be an additional | |
515 | * source-stream reference to | |
516 | * the flow. Accounting for such cases requires lot of | |
517 | * changes; perhaps | |
518 | * address this in the next release? - XXX */ | |
af4c2728 | 519 | flog_err( |
1c50c1c0 | 520 | EC_LIB_DEVELOPMENT, |
d62a17ae | 521 | "MSDP sa %s SPT teardown is causing the local entry to be removed", |
522 | sa->sg_str); | |
523 | return; | |
524 | } | |
525 | ||
526 | /* we are dropping the sa on upstream del we should not have an | |
527 | * upstream reference */ | |
528 | if (sa->up) { | |
529 | if (PIM_DEBUG_MSDP_INTERNAL) { | |
530 | zlog_debug("MSDP local sa %s del; up non-NULL", | |
531 | sa->sg_str); | |
532 | } | |
533 | sa->up = NULL; | |
534 | } | |
535 | pim_msdp_sa_deref(sa, PIM_MSDP_SAF_LOCAL); | |
536 | } | |
36e466fe | 537 | } |
538 | ||
1bf16443 | 539 | /* Local SA qualification needs to be re-evaluated when - |
540 | * 1. KAT is started or stopped | |
541 | * 2. on RP changes | |
542 | * 3. Whenever FHR status changes for a (S,G) - XXX - currently there | |
543 | * is no clear path to transition an entry out of "MASK_FHR" need | |
544 | * to discuss this with Donald. May result in some strangeness if the | |
545 | * FHR is also the RP. | |
546 | * 4. When msdp_reg timer is started or stopped | |
547 | */ | |
d62a17ae | 548 | void pim_msdp_sa_local_update(struct pim_upstream *up) |
1bf16443 | 549 | { |
472ad383 DS |
550 | struct pim_instance *pim = up->channel_oil->pim; |
551 | ||
d62a17ae | 552 | if (pim_msdp_sa_local_add_ok(up)) { |
472ad383 | 553 | pim_msdp_sa_local_add(pim, &up->sg); |
d62a17ae | 554 | } else { |
472ad383 | 555 | pim_msdp_sa_local_del(pim, &up->sg); |
d62a17ae | 556 | } |
1bf16443 | 557 | } |
558 | ||
472ad383 | 559 | static void pim_msdp_sa_local_setup(struct pim_instance *pim) |
3c72d654 | 560 | { |
d62a17ae | 561 | struct pim_upstream *up; |
3c72d654 | 562 | |
dd3364cb | 563 | frr_each (rb_pim_upstream, &pim->upstream_head, up) |
d62a17ae | 564 | pim_msdp_sa_local_update(up); |
3c72d654 | 565 | } |
566 | ||
7667c556 | 567 | /* whenever the RP changes we need to re-evaluate the "local" SA-cache */ |
568 | /* XXX: needs to be tested */ | |
472ad383 | 569 | void pim_msdp_i_am_rp_changed(struct pim_instance *pim) |
d62a17ae | 570 | { |
571 | struct listnode *sanode; | |
572 | struct listnode *nextnode; | |
573 | struct pim_msdp_sa *sa; | |
574 | ||
472ad383 | 575 | if (!(pim->msdp.flags & PIM_MSDPF_ENABLE)) { |
d62a17ae | 576 | /* if the feature is not enabled do nothing */ |
577 | return; | |
578 | } | |
579 | ||
580 | if (PIM_DEBUG_MSDP_INTERNAL) { | |
581 | zlog_debug("MSDP i_am_rp changed"); | |
582 | } | |
583 | ||
584 | /* mark all local entries as stale */ | |
472ad383 | 585 | for (ALL_LIST_ELEMENTS_RO(pim->msdp.sa_list, sanode, sa)) { |
d62a17ae | 586 | if (sa->flags & PIM_MSDP_SAF_LOCAL) { |
587 | sa->flags |= PIM_MSDP_SAF_STALE; | |
588 | } | |
589 | } | |
590 | ||
591 | /* re-setup local SA entries */ | |
472ad383 | 592 | pim_msdp_sa_local_setup(pim); |
d62a17ae | 593 | |
472ad383 | 594 | for (ALL_LIST_ELEMENTS(pim->msdp.sa_list, sanode, nextnode, sa)) { |
d62a17ae | 595 | /* purge stale SA entries */ |
596 | if (sa->flags & PIM_MSDP_SAF_STALE) { | |
597 | /* clear the stale flag; the entry may be kept even | |
598 | * after | |
599 | * "local-deref" */ | |
600 | sa->flags &= ~PIM_MSDP_SAF_STALE; | |
601 | /* sa_deref can end up freeing the sa; so don't access | |
602 | * contents after */ | |
603 | pim_msdp_sa_deref(sa, PIM_MSDP_SAF_LOCAL); | |
604 | } else { | |
605 | /* if the souce is still active check if we can | |
606 | * influence SPT */ | |
607 | pim_msdp_sa_upstream_update(sa, NULL /* xg_up */, | |
608 | "rp-change"); | |
609 | } | |
610 | } | |
7667c556 | 611 | } |
612 | ||
613 | /* We track the join state of (*, G) entries. If G has sources in the SA-cache | |
614 | * we need to setup or teardown SPT when the JoinDesired status changes for | |
615 | * (*, G) */ | |
1eca8576 DS |
616 | void pim_msdp_up_join_state_changed(struct pim_instance *pim, |
617 | struct pim_upstream *xg_up) | |
d62a17ae | 618 | { |
619 | struct listnode *sanode; | |
620 | struct pim_msdp_sa *sa; | |
621 | ||
622 | if (PIM_DEBUG_MSDP_INTERNAL) { | |
623 | zlog_debug("MSDP join state changed for %s", xg_up->sg_str); | |
624 | } | |
625 | ||
626 | /* If this is not really an XG entry just move on */ | |
2a27f13b | 627 | if (!pim_addr_is_any(xg_up->sg.src) || pim_addr_is_any(xg_up->sg.grp)) { |
d62a17ae | 628 | return; |
629 | } | |
630 | ||
631 | /* XXX: Need to maintain SAs per-group to avoid all this unnecessary | |
632 | * walking */ | |
472ad383 | 633 | for (ALL_LIST_ELEMENTS_RO(pim->msdp.sa_list, sanode, sa)) { |
032a7412 | 634 | if (pim_addr_cmp(sa->sg.grp, xg_up->sg.grp)) { |
d62a17ae | 635 | continue; |
636 | } | |
637 | pim_msdp_sa_upstream_update(sa, xg_up, "up-jp-change"); | |
638 | } | |
639 | } | |
640 | ||
6fff2cc6 | 641 | static void pim_msdp_up_xg_del(struct pim_instance *pim, pim_sgaddr *sg) |
d62a17ae | 642 | { |
643 | struct listnode *sanode; | |
644 | struct pim_msdp_sa *sa; | |
645 | ||
646 | if (PIM_DEBUG_MSDP_INTERNAL) { | |
98a81d2b | 647 | zlog_debug("MSDP %pSG del", sg); |
d62a17ae | 648 | } |
649 | ||
650 | /* If this is not really an XG entry just move on */ | |
2a27f13b | 651 | if (!pim_addr_is_any(sg->src) || pim_addr_is_any(sg->grp)) { |
d62a17ae | 652 | return; |
653 | } | |
654 | ||
655 | /* XXX: Need to maintain SAs per-group to avoid all this unnecessary | |
656 | * walking */ | |
472ad383 | 657 | for (ALL_LIST_ELEMENTS_RO(pim->msdp.sa_list, sanode, sa)) { |
032a7412 | 658 | if (pim_addr_cmp(sa->sg.grp, sg->grp)) { |
d62a17ae | 659 | continue; |
660 | } | |
661 | pim_msdp_sa_upstream_update(sa, NULL /* xg */, "up-jp-change"); | |
662 | } | |
663 | } | |
664 | ||
6fff2cc6 | 665 | void pim_msdp_up_del(struct pim_instance *pim, pim_sgaddr *sg) |
d62a17ae | 666 | { |
667 | if (PIM_DEBUG_MSDP_INTERNAL) { | |
98a81d2b | 668 | zlog_debug("MSDP up %pSG del", sg); |
d62a17ae | 669 | } |
2a27f13b | 670 | if (pim_addr_is_any(sg->src)) { |
472ad383 | 671 | pim_msdp_up_xg_del(pim, sg); |
d62a17ae | 672 | } else { |
472ad383 | 673 | pim_msdp_sa_local_del_on_up_del(pim, sg); |
d62a17ae | 674 | } |
36e466fe | 675 | } |
676 | ||
3c72d654 | 677 | /* sa hash and peer list helpers */ |
d8b87afe | 678 | static unsigned int pim_msdp_sa_hash_key_make(const void *p) |
3c72d654 | 679 | { |
d8b87afe | 680 | const struct pim_msdp_sa *sa = p; |
3c72d654 | 681 | |
62f59b58 | 682 | return pim_sgaddr_hash(sa->sg, 0); |
3c72d654 | 683 | } |
684 | ||
74df8d6d | 685 | static bool pim_msdp_sa_hash_eq(const void *p1, const void *p2) |
3c72d654 | 686 | { |
d62a17ae | 687 | const struct pim_msdp_sa *sa1 = p1; |
688 | const struct pim_msdp_sa *sa2 = p2; | |
3c72d654 | 689 | |
62f59b58 | 690 | return !pim_sgaddr_cmp(sa1->sg, sa2->sg); |
3c72d654 | 691 | } |
692 | ||
d62a17ae | 693 | static int pim_msdp_sa_comp(const void *p1, const void *p2) |
3c72d654 | 694 | { |
d62a17ae | 695 | const struct pim_msdp_sa *sa1 = p1; |
696 | const struct pim_msdp_sa *sa2 = p2; | |
3c72d654 | 697 | |
62f59b58 | 698 | return pim_sgaddr_cmp(sa1->sg, sa2->sg); |
3c72d654 | 699 | } |
700 | ||
701 | /* RFC-3618:Sec-10.1.3 - Peer-RPF forwarding */ | |
702 | /* XXX: this can use a bit of refining and extensions */ | |
d62a17ae | 703 | bool pim_msdp_peer_rpf_check(struct pim_msdp_peer *mp, struct in_addr rp) |
3c72d654 | 704 | { |
b0a13ffb | 705 | struct pim_nexthop nexthop = {0}; |
9fbd9fc4 | 706 | |
d62a17ae | 707 | if (mp->peer.s_addr == rp.s_addr) { |
708 | return true; | |
709 | } | |
3c72d654 | 710 | |
9fbd9fc4 AMR |
711 | /* check if the MSDP peer is the nexthop for the RP */ |
712 | if (pim_nexthop_lookup(mp->pim, &nexthop, rp, 0) | |
713 | && nexthop.mrib_nexthop_addr.u.prefix4.s_addr == mp->peer.s_addr) { | |
714 | return true; | |
715 | } | |
716 | ||
d62a17ae | 717 | return false; |
3c72d654 | 718 | } |
d62a17ae | 719 | |
3c72d654 | 720 | /************************ Peer session management **************************/ |
d62a17ae | 721 | char *pim_msdp_state_dump(enum pim_msdp_peer_state state, char *buf, |
722 | int buf_size) | |
723 | { | |
724 | switch (state) { | |
725 | case PIM_MSDP_DISABLED: | |
726 | snprintf(buf, buf_size, "%s", "disabled"); | |
727 | break; | |
728 | case PIM_MSDP_INACTIVE: | |
729 | snprintf(buf, buf_size, "%s", "inactive"); | |
730 | break; | |
731 | case PIM_MSDP_LISTEN: | |
732 | snprintf(buf, buf_size, "%s", "listen"); | |
733 | break; | |
734 | case PIM_MSDP_CONNECTING: | |
735 | snprintf(buf, buf_size, "%s", "connecting"); | |
736 | break; | |
737 | case PIM_MSDP_ESTABLISHED: | |
738 | snprintf(buf, buf_size, "%s", "established"); | |
739 | break; | |
740 | default: | |
741 | snprintf(buf, buf_size, "unk-%d", state); | |
742 | } | |
743 | return buf; | |
744 | } | |
745 | ||
d62a17ae | 746 | static void pim_msdp_peer_state_chg_log(struct pim_msdp_peer *mp) |
747 | { | |
748 | char state_str[PIM_MSDP_STATE_STRLEN]; | |
749 | ||
750 | pim_msdp_state_dump(mp->state, state_str, sizeof(state_str)); | |
751 | zlog_debug("MSDP peer %s state chg to %s", mp->key_str, state_str); | |
2a333e0f | 752 | } |
753 | ||
754 | /* MSDP Connection State Machine actions (defined in RFC-3618:Sec-11.2) */ | |
755 | /* 11.2.A2: active peer - start connect retry timer; when the timer fires | |
756 | * a tcp connection will be made */ | |
d62a17ae | 757 | static void pim_msdp_peer_connect(struct pim_msdp_peer *mp) |
2a333e0f | 758 | { |
d62a17ae | 759 | mp->state = PIM_MSDP_CONNECTING; |
760 | if (PIM_DEBUG_MSDP_EVENTS) { | |
761 | pim_msdp_peer_state_chg_log(mp); | |
762 | } | |
2a333e0f | 763 | |
d62a17ae | 764 | pim_msdp_peer_cr_timer_setup(mp, true /* start */); |
2a333e0f | 765 | } |
766 | ||
767 | /* 11.2.A3: passive peer - just listen for connections */ | |
d62a17ae | 768 | static void pim_msdp_peer_listen(struct pim_msdp_peer *mp) |
2a333e0f | 769 | { |
d62a17ae | 770 | mp->state = PIM_MSDP_LISTEN; |
771 | if (PIM_DEBUG_MSDP_EVENTS) { | |
772 | pim_msdp_peer_state_chg_log(mp); | |
773 | } | |
2a333e0f | 774 | |
d62a17ae | 775 | /* this is interntionally asymmetric i.e. we set up listen-socket when |
9d303b37 DL |
776 | * the |
777 | * first listening peer is configured; but don't bother tearing it down | |
778 | * when | |
779 | * all the peers go down */ | |
472ad383 | 780 | pim_msdp_sock_listen(mp->pim); |
2a333e0f | 781 | } |
782 | ||
783 | /* 11.2.A4 and 11.2.A5: transition active or passive peer to | |
784 | * established state */ | |
d62a17ae | 785 | void pim_msdp_peer_established(struct pim_msdp_peer *mp) |
2a333e0f | 786 | { |
d62a17ae | 787 | if (mp->state != PIM_MSDP_ESTABLISHED) { |
788 | ++mp->est_flaps; | |
789 | } | |
977d71cc | 790 | |
d62a17ae | 791 | mp->state = PIM_MSDP_ESTABLISHED; |
792 | mp->uptime = pim_time_monotonic_sec(); | |
2a333e0f | 793 | |
d62a17ae | 794 | if (PIM_DEBUG_MSDP_EVENTS) { |
795 | pim_msdp_peer_state_chg_log(mp); | |
796 | } | |
2a333e0f | 797 | |
d62a17ae | 798 | /* stop retry timer on active peers */ |
799 | pim_msdp_peer_cr_timer_setup(mp, false /* start */); | |
2a333e0f | 800 | |
d62a17ae | 801 | /* send KA; start KA and hold timers */ |
802 | pim_msdp_pkt_ka_tx(mp); | |
803 | pim_msdp_peer_ka_timer_setup(mp, true /* start */); | |
804 | pim_msdp_peer_hold_timer_setup(mp, true /* start */); | |
2a333e0f | 805 | |
d62a17ae | 806 | pim_msdp_pkt_sa_tx_to_one_peer(mp); |
3c72d654 | 807 | |
d62a17ae | 808 | PIM_MSDP_PEER_WRITE_ON(mp); |
809 | PIM_MSDP_PEER_READ_ON(mp); | |
2a333e0f | 810 | } |
811 | ||
812 | /* 11.2.A6, 11.2.A7 and 11.2.A8: shutdown the peer tcp connection */ | |
d62a17ae | 813 | void pim_msdp_peer_stop_tcp_conn(struct pim_msdp_peer *mp, bool chg_state) |
814 | { | |
815 | if (chg_state) { | |
816 | if (mp->state == PIM_MSDP_ESTABLISHED) { | |
817 | ++mp->est_flaps; | |
818 | } | |
819 | mp->state = PIM_MSDP_INACTIVE; | |
820 | if (PIM_DEBUG_MSDP_EVENTS) { | |
821 | pim_msdp_peer_state_chg_log(mp); | |
822 | } | |
823 | } | |
824 | ||
825 | if (PIM_DEBUG_MSDP_INTERNAL) { | |
826 | zlog_debug("MSDP peer %s pim_msdp_peer_stop_tcp_conn", | |
827 | mp->key_str); | |
828 | } | |
829 | /* stop read and write threads */ | |
830 | PIM_MSDP_PEER_READ_OFF(mp); | |
831 | PIM_MSDP_PEER_WRITE_OFF(mp); | |
832 | ||
833 | /* reset buffers */ | |
834 | mp->packet_size = 0; | |
835 | if (mp->ibuf) | |
836 | stream_reset(mp->ibuf); | |
837 | if (mp->obuf) | |
838 | stream_fifo_clean(mp->obuf); | |
839 | ||
840 | /* stop all peer timers */ | |
841 | pim_msdp_peer_ka_timer_setup(mp, false /* start */); | |
842 | pim_msdp_peer_cr_timer_setup(mp, false /* start */); | |
843 | pim_msdp_peer_hold_timer_setup(mp, false /* start */); | |
844 | ||
845 | /* close connection */ | |
846 | if (mp->fd >= 0) { | |
847 | close(mp->fd); | |
848 | mp->fd = -1; | |
849 | } | |
2a333e0f | 850 | } |
851 | ||
852 | /* RFC-3618:Sec-5.6 - stop the peer tcp connection and startover */ | |
d62a17ae | 853 | void pim_msdp_peer_reset_tcp_conn(struct pim_msdp_peer *mp, const char *rc_str) |
2a333e0f | 854 | { |
d62a17ae | 855 | if (PIM_DEBUG_EVENTS) { |
856 | zlog_debug("MSDP peer %s tcp reset %s", mp->key_str, rc_str); | |
857 | snprintf(mp->last_reset, sizeof(mp->last_reset), "%s", rc_str); | |
858 | } | |
2a333e0f | 859 | |
d62a17ae | 860 | /* close the connection and transition to listening or connecting */ |
861 | pim_msdp_peer_stop_tcp_conn(mp, true /* chg_state */); | |
862 | if (PIM_MSDP_PEER_IS_LISTENER(mp)) { | |
863 | pim_msdp_peer_listen(mp); | |
864 | } else { | |
865 | pim_msdp_peer_connect(mp); | |
866 | } | |
2a333e0f | 867 | } |
868 | ||
d62a17ae | 869 | static void pim_msdp_peer_timer_expiry_log(struct pim_msdp_peer *mp, |
870 | const char *timer_str) | |
2a333e0f | 871 | { |
d62a17ae | 872 | zlog_debug("MSDP peer %s %s timer expired", mp->key_str, timer_str); |
2a333e0f | 873 | } |
874 | ||
875 | /* RFC-3618:Sec-5.4 - peer hold timer */ | |
cc9f21da | 876 | static void pim_msdp_peer_hold_timer_cb(struct thread *t) |
2a333e0f | 877 | { |
d62a17ae | 878 | struct pim_msdp_peer *mp; |
2a333e0f | 879 | |
d62a17ae | 880 | mp = THREAD_ARG(t); |
2a333e0f | 881 | |
d62a17ae | 882 | if (PIM_DEBUG_MSDP_EVENTS) { |
883 | pim_msdp_peer_timer_expiry_log(mp, "hold"); | |
884 | } | |
2a333e0f | 885 | |
d62a17ae | 886 | if (mp->state != PIM_MSDP_ESTABLISHED) { |
cc9f21da | 887 | return; |
d62a17ae | 888 | } |
2a333e0f | 889 | |
d62a17ae | 890 | if (PIM_DEBUG_MSDP_EVENTS) { |
891 | pim_msdp_peer_state_chg_log(mp); | |
892 | } | |
893 | pim_msdp_peer_reset_tcp_conn(mp, "ht-expired"); | |
2a333e0f | 894 | } |
472ad383 | 895 | |
d62a17ae | 896 | static void pim_msdp_peer_hold_timer_setup(struct pim_msdp_peer *mp, bool start) |
2a333e0f | 897 | { |
472ad383 | 898 | struct pim_instance *pim = mp->pim; |
d62a17ae | 899 | THREAD_OFF(mp->hold_timer); |
900 | if (start) { | |
472ad383 | 901 | thread_add_timer(pim->msdp.master, pim_msdp_peer_hold_timer_cb, |
622fd3f1 | 902 | mp, pim->msdp.hold_time, &mp->hold_timer); |
d62a17ae | 903 | } |
2a333e0f | 904 | } |
905 | ||
906 | ||
907 | /* RFC-3618:Sec-5.5 - peer keepalive timer */ | |
cc9f21da | 908 | static void pim_msdp_peer_ka_timer_cb(struct thread *t) |
2a333e0f | 909 | { |
d62a17ae | 910 | struct pim_msdp_peer *mp; |
2a333e0f | 911 | |
d62a17ae | 912 | mp = THREAD_ARG(t); |
2a333e0f | 913 | |
d62a17ae | 914 | if (PIM_DEBUG_MSDP_EVENTS) { |
915 | pim_msdp_peer_timer_expiry_log(mp, "ka"); | |
916 | } | |
2a333e0f | 917 | |
d62a17ae | 918 | pim_msdp_pkt_ka_tx(mp); |
919 | pim_msdp_peer_ka_timer_setup(mp, true /* start */); | |
2a333e0f | 920 | } |
cc9f21da | 921 | |
d62a17ae | 922 | static void pim_msdp_peer_ka_timer_setup(struct pim_msdp_peer *mp, bool start) |
2a333e0f | 923 | { |
d62a17ae | 924 | THREAD_OFF(mp->ka_timer); |
925 | if (start) { | |
472ad383 DS |
926 | thread_add_timer(mp->pim->msdp.master, |
927 | pim_msdp_peer_ka_timer_cb, mp, | |
622fd3f1 | 928 | mp->pim->msdp.keep_alive, &mp->ka_timer); |
d62a17ae | 929 | } |
2a333e0f | 930 | } |
931 | ||
d62a17ae | 932 | static void pim_msdp_peer_active_connect(struct pim_msdp_peer *mp) |
2a333e0f | 933 | { |
d62a17ae | 934 | int rc; |
935 | ++mp->conn_attempts; | |
936 | rc = pim_msdp_sock_connect(mp); | |
2a333e0f | 937 | |
d62a17ae | 938 | if (PIM_DEBUG_MSDP_INTERNAL) { |
939 | zlog_debug("MSDP peer %s pim_msdp_peer_active_connect: %d", | |
940 | mp->key_str, rc); | |
941 | } | |
2a333e0f | 942 | |
d62a17ae | 943 | switch (rc) { |
944 | case connect_error: | |
945 | case -1: | |
946 | /* connect failed restart the connect-retry timer */ | |
947 | pim_msdp_peer_cr_timer_setup(mp, true /* start */); | |
948 | break; | |
2a333e0f | 949 | |
d62a17ae | 950 | case connect_success: |
951 | /* connect was sucessful move to established */ | |
952 | pim_msdp_peer_established(mp); | |
953 | break; | |
2a333e0f | 954 | |
d62a17ae | 955 | case connect_in_progress: |
956 | /* for NB content we need to wait till sock is readable or | |
957 | * writeable */ | |
958 | PIM_MSDP_PEER_WRITE_ON(mp); | |
959 | PIM_MSDP_PEER_READ_ON(mp); | |
960 | /* also restart connect-retry timer to reset the socket if | |
961 | * connect is | |
962 | * not sucessful */ | |
963 | pim_msdp_peer_cr_timer_setup(mp, true /* start */); | |
964 | break; | |
965 | } | |
2a333e0f | 966 | } |
967 | ||
968 | /* RFC-3618:Sec-5.6 - connection retry on active peer */ | |
cc9f21da | 969 | static void pim_msdp_peer_cr_timer_cb(struct thread *t) |
2a333e0f | 970 | { |
d62a17ae | 971 | struct pim_msdp_peer *mp; |
2a333e0f | 972 | |
d62a17ae | 973 | mp = THREAD_ARG(t); |
2a333e0f | 974 | |
d62a17ae | 975 | if (PIM_DEBUG_MSDP_EVENTS) { |
976 | pim_msdp_peer_timer_expiry_log(mp, "connect-retry"); | |
977 | } | |
2a333e0f | 978 | |
d62a17ae | 979 | if (mp->state != PIM_MSDP_CONNECTING || PIM_MSDP_PEER_IS_LISTENER(mp)) { |
cc9f21da | 980 | return; |
d62a17ae | 981 | } |
2a333e0f | 982 | |
d62a17ae | 983 | pim_msdp_peer_active_connect(mp); |
2a333e0f | 984 | } |
cc9f21da | 985 | |
d62a17ae | 986 | static void pim_msdp_peer_cr_timer_setup(struct pim_msdp_peer *mp, bool start) |
2a333e0f | 987 | { |
d62a17ae | 988 | THREAD_OFF(mp->cr_timer); |
989 | if (start) { | |
622fd3f1 RZ |
990 | thread_add_timer(mp->pim->msdp.master, |
991 | pim_msdp_peer_cr_timer_cb, mp, | |
992 | mp->pim->msdp.connection_retry, &mp->cr_timer); | |
d62a17ae | 993 | } |
2a333e0f | 994 | } |
995 | ||
996 | /* if a valid packet is rxed from the peer we can restart hold timer */ | |
d62a17ae | 997 | void pim_msdp_peer_pkt_rxed(struct pim_msdp_peer *mp) |
2a333e0f | 998 | { |
d62a17ae | 999 | if (mp->state == PIM_MSDP_ESTABLISHED) { |
1000 | pim_msdp_peer_hold_timer_setup(mp, true /* start */); | |
1001 | } | |
2a333e0f | 1002 | } |
1003 | ||
3c72d654 | 1004 | /* if a valid packet is txed to the peer we can restart ka timer and avoid |
1005 | * unnecessary ka noise in the network */ | |
d62a17ae | 1006 | void pim_msdp_peer_pkt_txed(struct pim_msdp_peer *mp) |
3c72d654 | 1007 | { |
d62a17ae | 1008 | if (mp->state == PIM_MSDP_ESTABLISHED) { |
1009 | pim_msdp_peer_ka_timer_setup(mp, true /* start */); | |
1010 | if (PIM_DEBUG_MSDP_INTERNAL) { | |
1011 | zlog_debug("MSDP ka timer restart on pkt tx to %s", | |
1012 | mp->key_str); | |
1013 | } | |
1014 | } | |
3c72d654 | 1015 | } |
1016 | ||
2a333e0f | 1017 | static void pim_msdp_addr2su(union sockunion *su, struct in_addr addr) |
1018 | { | |
d62a17ae | 1019 | sockunion_init(su); |
1020 | su->sin.sin_addr = addr; | |
1021 | su->sin.sin_family = AF_INET; | |
2a333e0f | 1022 | #ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN |
d62a17ae | 1023 | su->sin.sin_len = sizeof(struct sockaddr_in); |
2a333e0f | 1024 | #endif /* HAVE_STRUCT_SOCKADDR_IN_SIN_LEN */ |
1025 | } | |
1026 | ||
1027 | /* 11.2.A1: create a new peer and transition state to listen or connecting */ | |
c72d97a5 | 1028 | struct pim_msdp_peer *pim_msdp_peer_add(struct pim_instance *pim, |
56697b3e RZ |
1029 | const struct in_addr *peer, |
1030 | const struct in_addr *local, | |
1031 | const char *mesh_group_name) | |
d62a17ae | 1032 | { |
1033 | struct pim_msdp_peer *mp; | |
1034 | ||
472ad383 | 1035 | pim_msdp_enable(pim); |
d62a17ae | 1036 | |
1037 | mp = XCALLOC(MTYPE_PIM_MSDP_PEER, sizeof(*mp)); | |
d62a17ae | 1038 | |
472ad383 | 1039 | mp->pim = pim; |
56697b3e | 1040 | mp->peer = *peer; |
d62a17ae | 1041 | pim_inet4_dump("<peer?>", mp->peer, mp->key_str, sizeof(mp->key_str)); |
1042 | pim_msdp_addr2su(&mp->su_peer, mp->peer); | |
56697b3e | 1043 | mp->local = *local; |
d62a17ae | 1044 | /* XXX: originator_id setting needs to move to the mesh group */ |
56697b3e | 1045 | pim->msdp.originator_id = *local; |
d62a17ae | 1046 | pim_msdp_addr2su(&mp->su_local, mp->local); |
0ce04a08 RZ |
1047 | if (mesh_group_name) |
1048 | mp->mesh_group_name = | |
1049 | XSTRDUP(MTYPE_PIM_MSDP_MG_NAME, mesh_group_name); | |
1050 | ||
d62a17ae | 1051 | mp->state = PIM_MSDP_INACTIVE; |
1052 | mp->fd = -1; | |
c35b7e6b | 1053 | strlcpy(mp->last_reset, "-", sizeof(mp->last_reset)); |
d62a17ae | 1054 | /* higher IP address is listener */ |
1055 | if (ntohl(mp->local.s_addr) > ntohl(mp->peer.s_addr)) { | |
1056 | mp->flags |= PIM_MSDP_PEERF_LISTENER; | |
1057 | } | |
1058 | ||
1059 | /* setup packet buffers */ | |
1060 | mp->ibuf = stream_new(PIM_MSDP_MAX_PACKET_SIZE); | |
1061 | mp->obuf = stream_fifo_new(); | |
1062 | ||
1063 | /* insert into misc tables for easy access */ | |
472ad383 DS |
1064 | mp = hash_get(pim->msdp.peer_hash, mp, hash_alloc_intern); |
1065 | listnode_add_sort(pim->msdp.peer_list, mp); | |
d62a17ae | 1066 | |
1067 | if (PIM_DEBUG_MSDP_EVENTS) { | |
1068 | zlog_debug("MSDP peer %s created", mp->key_str); | |
1069 | ||
1070 | pim_msdp_peer_state_chg_log(mp); | |
1071 | } | |
1072 | ||
1073 | /* fireup the connect state machine */ | |
1074 | if (PIM_MSDP_PEER_IS_LISTENER(mp)) { | |
1075 | pim_msdp_peer_listen(mp); | |
1076 | } else { | |
1077 | pim_msdp_peer_connect(mp); | |
1078 | } | |
56697b3e | 1079 | return mp; |
d62a17ae | 1080 | } |
1081 | ||
472ad383 DS |
1082 | struct pim_msdp_peer *pim_msdp_peer_find(struct pim_instance *pim, |
1083 | struct in_addr peer_addr) | |
d62a17ae | 1084 | { |
1085 | struct pim_msdp_peer lookup; | |
1086 | ||
1087 | lookup.peer = peer_addr; | |
472ad383 | 1088 | return hash_lookup(pim->msdp.peer_hash, &lookup); |
2a333e0f | 1089 | } |
1090 | ||
2a333e0f | 1091 | /* release all mem associated with a peer */ |
d62a17ae | 1092 | static void pim_msdp_peer_free(struct pim_msdp_peer *mp) |
11128587 | 1093 | { |
ec2f0e53 DS |
1094 | /* |
1095 | * Let's make sure we are not running when we delete | |
1096 | * the underlying data structure | |
1097 | */ | |
845d9af7 | 1098 | pim_msdp_peer_stop_tcp_conn(mp, false); |
ec2f0e53 | 1099 | |
d62a17ae | 1100 | if (mp->ibuf) { |
1101 | stream_free(mp->ibuf); | |
1102 | } | |
2a333e0f | 1103 | |
d62a17ae | 1104 | if (mp->obuf) { |
1105 | stream_fifo_free(mp->obuf); | |
1106 | } | |
2a333e0f | 1107 | |
e1b36e13 | 1108 | XFREE(MTYPE_PIM_MSDP_MG_NAME, mp->mesh_group_name); |
845d9af7 DS |
1109 | |
1110 | mp->pim = NULL; | |
d62a17ae | 1111 | XFREE(MTYPE_PIM_MSDP_PEER, mp); |
2a333e0f | 1112 | } |
1113 | ||
1114 | /* delete the peer config */ | |
c72d97a5 | 1115 | void pim_msdp_peer_del(struct pim_msdp_peer **mp) |
2a333e0f | 1116 | { |
56697b3e RZ |
1117 | if (*mp == NULL) |
1118 | return; | |
1119 | ||
d62a17ae | 1120 | /* stop the tcp connection and shutdown all timers */ |
56697b3e | 1121 | pim_msdp_peer_stop_tcp_conn(*mp, true /* chg_state */); |
2a333e0f | 1122 | |
d62a17ae | 1123 | /* remove the session from various tables */ |
56697b3e RZ |
1124 | listnode_delete((*mp)->pim->msdp.peer_list, *mp); |
1125 | hash_release((*mp)->pim->msdp.peer_hash, *mp); | |
2a333e0f | 1126 | |
d62a17ae | 1127 | if (PIM_DEBUG_MSDP_EVENTS) { |
56697b3e | 1128 | zlog_debug("MSDP peer %s deleted", (*mp)->key_str); |
d62a17ae | 1129 | } |
2a333e0f | 1130 | |
d62a17ae | 1131 | /* free up any associated memory */ |
56697b3e RZ |
1132 | pim_msdp_peer_free(*mp); |
1133 | *mp = NULL; | |
2a333e0f | 1134 | } |
1135 | ||
56697b3e RZ |
1136 | void pim_msdp_peer_change_source(struct pim_msdp_peer *mp, |
1137 | const struct in_addr *addr) | |
977d71cc | 1138 | { |
56697b3e | 1139 | pim_msdp_peer_stop_tcp_conn(mp, true); |
977d71cc | 1140 | |
56697b3e | 1141 | mp->local = *addr; |
977d71cc | 1142 | |
56697b3e RZ |
1143 | if (PIM_MSDP_PEER_IS_LISTENER(mp)) |
1144 | pim_msdp_peer_listen(mp); | |
1145 | else | |
1146 | pim_msdp_peer_connect(mp); | |
977d71cc | 1147 | } |
1148 | ||
2a333e0f | 1149 | /* peer hash and peer list helpers */ |
d8b87afe | 1150 | static unsigned int pim_msdp_peer_hash_key_make(const void *p) |
2a333e0f | 1151 | { |
d8b87afe | 1152 | const struct pim_msdp_peer *mp = p; |
d62a17ae | 1153 | return (jhash_1word(mp->peer.s_addr, 0)); |
2a333e0f | 1154 | } |
1155 | ||
74df8d6d | 1156 | static bool pim_msdp_peer_hash_eq(const void *p1, const void *p2) |
2a333e0f | 1157 | { |
d62a17ae | 1158 | const struct pim_msdp_peer *mp1 = p1; |
1159 | const struct pim_msdp_peer *mp2 = p2; | |
2a333e0f | 1160 | |
d62a17ae | 1161 | return (mp1->peer.s_addr == mp2->peer.s_addr); |
2a333e0f | 1162 | } |
1163 | ||
d62a17ae | 1164 | static int pim_msdp_peer_comp(const void *p1, const void *p2) |
2a333e0f | 1165 | { |
d62a17ae | 1166 | const struct pim_msdp_peer *mp1 = p1; |
1167 | const struct pim_msdp_peer *mp2 = p2; | |
2a333e0f | 1168 | |
d62a17ae | 1169 | if (ntohl(mp1->peer.s_addr) < ntohl(mp2->peer.s_addr)) |
1170 | return -1; | |
2a333e0f | 1171 | |
d62a17ae | 1172 | if (ntohl(mp1->peer.s_addr) > ntohl(mp2->peer.s_addr)) |
1173 | return 1; | |
2a333e0f | 1174 | |
d62a17ae | 1175 | return 0; |
2a333e0f | 1176 | } |
1177 | ||
977d71cc | 1178 | /************************** Mesh group management **************************/ |
e2809e61 | 1179 | void pim_msdp_mg_free(struct pim_instance *pim, struct pim_msdp_mg **mgp) |
977d71cc | 1180 | { |
e2809e61 RZ |
1181 | struct pim_msdp_mg_mbr *mbr; |
1182 | struct listnode *n, *nn; | |
822d3c85 | 1183 | |
e2809e61 | 1184 | if (*mgp == NULL) |
d62a17ae | 1185 | return; |
e2809e61 RZ |
1186 | |
1187 | /* SIP is being removed - tear down all active peer sessions */ | |
1188 | for (ALL_LIST_ELEMENTS((*mgp)->mbr_list, n, nn, mbr)) | |
fb35f654 | 1189 | pim_msdp_mg_mbr_del((*mgp), mbr); |
977d71cc | 1190 | |
d62a17ae | 1191 | if (PIM_DEBUG_MSDP_EVENTS) { |
e2809e61 RZ |
1192 | zlog_debug("MSDP mesh-group %s deleted", |
1193 | (*mgp)->mesh_group_name); | |
d62a17ae | 1194 | } |
977d71cc | 1195 | |
e2809e61 RZ |
1196 | XFREE(MTYPE_PIM_MSDP_MG_NAME, (*mgp)->mesh_group_name); |
1197 | ||
1198 | if ((*mgp)->mbr_list) | |
1199 | list_delete(&(*mgp)->mbr_list); | |
b9b1e1f2 | 1200 | |
3e7ec159 | 1201 | SLIST_REMOVE(&pim->msdp.mglist, (*mgp), pim_msdp_mg, mg_entry); |
e2809e61 | 1202 | XFREE(MTYPE_PIM_MSDP_MG, (*mgp)); |
977d71cc | 1203 | } |
1204 | ||
e2809e61 RZ |
1205 | struct pim_msdp_mg *pim_msdp_mg_new(struct pim_instance *pim, |
1206 | const char *mesh_group_name) | |
977d71cc | 1207 | { |
d62a17ae | 1208 | struct pim_msdp_mg *mg; |
977d71cc | 1209 | |
d62a17ae | 1210 | mg = XCALLOC(MTYPE_PIM_MSDP_MG, sizeof(*mg)); |
977d71cc | 1211 | |
d62a17ae | 1212 | mg->mesh_group_name = XSTRDUP(MTYPE_PIM_MSDP_MG_NAME, mesh_group_name); |
1213 | mg->mbr_list = list_new(); | |
1214 | mg->mbr_list->del = (void (*)(void *))pim_msdp_mg_mbr_free; | |
1215 | mg->mbr_list->cmp = (int (*)(void *, void *))pim_msdp_mg_mbr_comp; | |
977d71cc | 1216 | |
d62a17ae | 1217 | if (PIM_DEBUG_MSDP_EVENTS) { |
1218 | zlog_debug("MSDP mesh-group %s created", mg->mesh_group_name); | |
1219 | } | |
977d71cc | 1220 | |
e2809e61 | 1221 | SLIST_INSERT_HEAD(&pim->msdp.mglist, mg, mg_entry); |
977d71cc | 1222 | |
e2809e61 | 1223 | return mg; |
977d71cc | 1224 | } |
1225 | ||
d62a17ae | 1226 | static int pim_msdp_mg_mbr_comp(const void *p1, const void *p2) |
977d71cc | 1227 | { |
d62a17ae | 1228 | const struct pim_msdp_mg_mbr *mbr1 = p1; |
1229 | const struct pim_msdp_mg_mbr *mbr2 = p2; | |
977d71cc | 1230 | |
d62a17ae | 1231 | if (ntohl(mbr1->mbr_ip.s_addr) < ntohl(mbr2->mbr_ip.s_addr)) |
1232 | return -1; | |
977d71cc | 1233 | |
d62a17ae | 1234 | if (ntohl(mbr1->mbr_ip.s_addr) > ntohl(mbr2->mbr_ip.s_addr)) |
1235 | return 1; | |
977d71cc | 1236 | |
d62a17ae | 1237 | return 0; |
977d71cc | 1238 | } |
1239 | ||
d62a17ae | 1240 | static void pim_msdp_mg_mbr_free(struct pim_msdp_mg_mbr *mbr) |
977d71cc | 1241 | { |
d62a17ae | 1242 | XFREE(MTYPE_PIM_MSDP_MG_MBR, mbr); |
977d71cc | 1243 | } |
1244 | ||
fb35f654 | 1245 | void pim_msdp_mg_mbr_del(struct pim_msdp_mg *mg, struct pim_msdp_mg_mbr *mbr) |
977d71cc | 1246 | { |
d62a17ae | 1247 | /* Delete active peer session if any */ |
1248 | if (mbr->mp) { | |
c72d97a5 | 1249 | pim_msdp_peer_del(&mbr->mp); |
d62a17ae | 1250 | } |
977d71cc | 1251 | |
d62a17ae | 1252 | listnode_delete(mg->mbr_list, mbr); |
1253 | if (PIM_DEBUG_MSDP_EVENTS) { | |
1254 | char ip_str[INET_ADDRSTRLEN]; | |
1255 | pim_inet4_dump("<mbr?>", mbr->mbr_ip, ip_str, sizeof(ip_str)); | |
1256 | zlog_debug("MSDP mesh-group %s mbr %s deleted", | |
1257 | mg->mesh_group_name, ip_str); | |
1258 | } | |
1259 | pim_msdp_mg_mbr_free(mbr); | |
1260 | if (mg->mbr_cnt) { | |
1261 | --mg->mbr_cnt; | |
1262 | } | |
977d71cc | 1263 | } |
1264 | ||
fb35f654 | 1265 | static void pim_msdp_src_del(struct pim_msdp_mg *mg) |
d62a17ae | 1266 | { |
1267 | struct pim_msdp_mg_mbr *mbr; | |
1268 | struct listnode *mbr_node; | |
d62a17ae | 1269 | |
1270 | /* SIP is being removed - tear down all active peer sessions */ | |
1271 | for (ALL_LIST_ELEMENTS_RO(mg->mbr_list, mbr_node, mbr)) { | |
56697b3e | 1272 | if (mbr->mp) |
c72d97a5 | 1273 | pim_msdp_peer_del(&mbr->mp); |
d62a17ae | 1274 | } |
1275 | if (PIM_DEBUG_MSDP_EVENTS) { | |
1276 | zlog_debug("MSDP mesh-group %s src cleared", | |
1277 | mg->mesh_group_name); | |
1278 | } | |
1279 | } | |
1280 | ||
3c72d654 | 1281 | /*********************** MSDP feature APIs *********************************/ |
84f25989 DS |
1282 | int pim_msdp_config_write(struct pim_instance *pim, struct vty *vty, |
1283 | const char *spaces) | |
d62a17ae | 1284 | { |
e2809e61 | 1285 | struct pim_msdp_mg *mg; |
d62a17ae | 1286 | struct listnode *mbrnode; |
1287 | struct pim_msdp_mg_mbr *mbr; | |
d62a17ae | 1288 | char src_str[INET_ADDRSTRLEN]; |
1289 | int count = 0; | |
1290 | ||
e2809e61 | 1291 | if (SLIST_EMPTY(&pim->msdp.mglist)) |
d62a17ae | 1292 | return count; |
d62a17ae | 1293 | |
e2809e61 RZ |
1294 | SLIST_FOREACH (mg, &pim->msdp.mglist, mg_entry) { |
1295 | if (mg->src_ip.s_addr != INADDR_ANY) { | |
1296 | pim_inet4_dump("<src?>", mg->src_ip, src_str, | |
1297 | sizeof(src_str)); | |
1298 | vty_out(vty, "%sip msdp mesh-group %s source %s\n", | |
1299 | spaces, mg->mesh_group_name, src_str); | |
1300 | ++count; | |
1301 | } | |
d62a17ae | 1302 | |
e2809e61 | 1303 | for (ALL_LIST_ELEMENTS_RO(mg->mbr_list, mbrnode, mbr)) { |
97495b70 CS |
1304 | vty_out(vty, "%sip msdp mesh-group %s member %pI4\n", |
1305 | spaces, mg->mesh_group_name, &mbr->mbr_ip); | |
e2809e61 RZ |
1306 | ++count; |
1307 | } | |
d62a17ae | 1308 | } |
e2809e61 | 1309 | |
d62a17ae | 1310 | return count; |
472ad383 DS |
1311 | } |
1312 | ||
8c70c9e2 RZ |
1313 | bool pim_msdp_peer_config_write(struct vty *vty, struct pim_instance *pim, |
1314 | const char *spaces) | |
1315 | { | |
1316 | struct pim_msdp_peer *mp; | |
1317 | struct listnode *node; | |
1318 | bool written = false; | |
1319 | ||
1320 | for (ALL_LIST_ELEMENTS_RO(pim->msdp.peer_list, node, mp)) { | |
0ce04a08 RZ |
1321 | /* Skip meshed group peers. */ |
1322 | if (mp->flags & PIM_MSDP_PEERF_IN_GROUP) | |
8c70c9e2 RZ |
1323 | continue; |
1324 | ||
1325 | vty_out(vty, "%sip msdp peer %pI4 source %pI4\n", spaces, | |
1326 | &mp->peer, &mp->local); | |
1327 | written = true; | |
1328 | } | |
1329 | ||
1330 | return written; | |
1331 | } | |
1332 | ||
3c72d654 | 1333 | /* Enable feature including active/periodic timers etc. on the first peer |
1334 | * config. Till then MSDP should just stay quiet. */ | |
472ad383 | 1335 | static void pim_msdp_enable(struct pim_instance *pim) |
3c72d654 | 1336 | { |
472ad383 | 1337 | if (pim->msdp.flags & PIM_MSDPF_ENABLE) { |
d62a17ae | 1338 | /* feature is already enabled */ |
1339 | return; | |
1340 | } | |
472ad383 DS |
1341 | pim->msdp.flags |= PIM_MSDPF_ENABLE; |
1342 | pim->msdp.work_obuf = stream_new(PIM_MSDP_MAX_PACKET_SIZE); | |
1343 | pim_msdp_sa_adv_timer_setup(pim, true /* start */); | |
d62a17ae | 1344 | /* setup sa cache based on local sources */ |
472ad383 | 1345 | pim_msdp_sa_local_setup(pim); |
3c72d654 | 1346 | } |
1347 | ||
2a333e0f | 1348 | /* MSDP init */ |
64c86530 | 1349 | void pim_msdp_init(struct pim_instance *pim, struct thread_master *master) |
2a333e0f | 1350 | { |
472ad383 | 1351 | pim->msdp.master = master; |
9fb302f4 | 1352 | char hash_name[64]; |
3c72d654 | 1353 | |
772270f3 QY |
1354 | snprintf(hash_name, sizeof(hash_name), "PIM %s MSDP Peer Hash", |
1355 | pim->vrf->name); | |
2ad78035 | 1356 | pim->msdp.peer_hash = hash_create(pim_msdp_peer_hash_key_make, |
9fb302f4 | 1357 | pim_msdp_peer_hash_eq, hash_name); |
2ad78035 DS |
1358 | pim->msdp.peer_list = list_new(); |
1359 | pim->msdp.peer_list->del = (void (*)(void *))pim_msdp_peer_free; | |
1360 | pim->msdp.peer_list->cmp = (int (*)(void *, void *))pim_msdp_peer_comp; | |
3c72d654 | 1361 | |
772270f3 QY |
1362 | snprintf(hash_name, sizeof(hash_name), "PIM %s MSDP SA Hash", |
1363 | pim->vrf->name); | |
2ad78035 | 1364 | pim->msdp.sa_hash = hash_create(pim_msdp_sa_hash_key_make, |
9fb302f4 | 1365 | pim_msdp_sa_hash_eq, hash_name); |
2ad78035 DS |
1366 | pim->msdp.sa_list = list_new(); |
1367 | pim->msdp.sa_list->del = (void (*)(void *))pim_msdp_sa_free; | |
1368 | pim->msdp.sa_list->cmp = (int (*)(void *, void *))pim_msdp_sa_comp; | |
2a333e0f | 1369 | } |
1370 | ||
1371 | /* counterpart to MSDP init; XXX: unused currently */ | |
2ad78035 | 1372 | void pim_msdp_exit(struct pim_instance *pim) |
2a333e0f | 1373 | { |
e2809e61 | 1374 | struct pim_msdp_mg *mg; |
ec2f0e53 | 1375 | |
e2809e61 | 1376 | pim_msdp_sa_adv_timer_setup(pim, false); |
2a333e0f | 1377 | |
e2809e61 RZ |
1378 | /* Stop listener and delete all peer sessions */ |
1379 | while ((mg = SLIST_FIRST(&pim->msdp.mglist)) != NULL) | |
1380 | pim_msdp_mg_free(pim, &mg); | |
822d3c85 | 1381 | |
2ad78035 | 1382 | if (pim->msdp.peer_hash) { |
36ef2c10 | 1383 | hash_clean(pim->msdp.peer_hash, NULL); |
2ad78035 DS |
1384 | hash_free(pim->msdp.peer_hash); |
1385 | pim->msdp.peer_hash = NULL; | |
d62a17ae | 1386 | } |
2a333e0f | 1387 | |
2ad78035 | 1388 | if (pim->msdp.peer_list) { |
6a154c88 | 1389 | list_delete(&pim->msdp.peer_list); |
d62a17ae | 1390 | } |
3da8a099 DS |
1391 | |
1392 | if (pim->msdp.sa_hash) { | |
36ef2c10 | 1393 | hash_clean(pim->msdp.sa_hash, NULL); |
3da8a099 DS |
1394 | hash_free(pim->msdp.sa_hash); |
1395 | pim->msdp.sa_hash = NULL; | |
1396 | } | |
1397 | ||
1398 | if (pim->msdp.sa_list) { | |
6a154c88 | 1399 | list_delete(&pim->msdp.sa_list); |
3da8a099 | 1400 | } |
36ef2c10 DS |
1401 | |
1402 | if (pim->msdp.work_obuf) | |
1403 | stream_free(pim->msdp.work_obuf); | |
1404 | pim->msdp.work_obuf = NULL; | |
11128587 | 1405 | } |
e2809e61 | 1406 | |
fb35f654 RZ |
1407 | void pim_msdp_mg_src_add(struct pim_instance *pim, struct pim_msdp_mg *mg, |
1408 | struct in_addr *ai) | |
e2809e61 RZ |
1409 | { |
1410 | struct pim_msdp_mg_mbr *mbr; | |
1411 | struct listnode *mbr_node; | |
1412 | ||
1413 | /* Stop all connections and remove data structures. */ | |
fb35f654 | 1414 | pim_msdp_src_del(mg); |
e2809e61 RZ |
1415 | |
1416 | /* Set new address. */ | |
1417 | mg->src_ip = *ai; | |
1418 | ||
1419 | /* No new address, disable everyone. */ | |
1420 | if (ai->s_addr == INADDR_ANY) { | |
1421 | if (PIM_DEBUG_MSDP_EVENTS) | |
1422 | zlog_debug("MSDP mesh-group %s src unset", | |
1423 | mg->mesh_group_name); | |
1424 | return; | |
1425 | } | |
1426 | ||
1427 | /* Create data structures and start TCP connection. */ | |
1428 | for (ALL_LIST_ELEMENTS_RO(mg->mbr_list, mbr_node, mbr)) | |
c72d97a5 | 1429 | mbr->mp = pim_msdp_peer_add(pim, &mbr->mbr_ip, &mg->src_ip, |
56697b3e | 1430 | mg->mesh_group_name); |
e2809e61 RZ |
1431 | |
1432 | if (PIM_DEBUG_MSDP_EVENTS) | |
1433 | zlog_debug("MSDP mesh-group %s src %pI4 set", | |
1434 | mg->mesh_group_name, &mg->src_ip); | |
1435 | } | |
1436 | ||
fb35f654 RZ |
1437 | struct pim_msdp_mg_mbr *pim_msdp_mg_mbr_add(struct pim_instance *pim, |
1438 | struct pim_msdp_mg *mg, | |
1439 | struct in_addr *ia) | |
e2809e61 RZ |
1440 | { |
1441 | struct pim_msdp_mg_mbr *mbr; | |
1442 | ||
1443 | mbr = XCALLOC(MTYPE_PIM_MSDP_MG_MBR, sizeof(*mbr)); | |
1444 | mbr->mbr_ip = *ia; | |
1445 | listnode_add_sort(mg->mbr_list, mbr); | |
1446 | ||
1447 | /* if valid SIP has been configured add peer session */ | |
1448 | if (mg->src_ip.s_addr != INADDR_ANY) | |
c72d97a5 | 1449 | mbr->mp = pim_msdp_peer_add(pim, &mbr->mbr_ip, &mg->src_ip, |
56697b3e | 1450 | mg->mesh_group_name); |
e2809e61 RZ |
1451 | |
1452 | if (PIM_DEBUG_MSDP_EVENTS) | |
1453 | zlog_debug("MSDP mesh-group %s mbr %pI4 created", | |
1454 | mg->mesh_group_name, &mbr->mbr_ip); | |
1455 | ||
1456 | ++mg->mbr_cnt; | |
1457 | ||
1458 | return mbr; | |
1459 | } |