]>
Commit | Line | Data |
---|---|---|
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> | |
11128587 | 31 | |
2a333e0f | 32 | #include "pimd.h" |
33 | #include "pim_cmd.h" | |
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); | |
d62a17ae | 60 | static void pim_msdp_mg_mbr_do_del(struct pim_msdp_mg *mg, |
61 | struct pim_msdp_mg_mbr *mbr); | |
2a333e0f | 62 | |
3c72d654 | 63 | /************************ SA cache management ******************************/ |
d62a17ae | 64 | static void pim_msdp_sa_timer_expiry_log(struct pim_msdp_sa *sa, |
65 | const char *timer_str) | |
3c72d654 | 66 | { |
d62a17ae | 67 | zlog_debug("MSDP SA %s %s timer expired", sa->sg_str, timer_str); |
3c72d654 | 68 | } |
69 | ||
70 | /* RFC-3618:Sec-5.1 - global active source advertisement timer */ | |
d62a17ae | 71 | static int pim_msdp_sa_adv_timer_cb(struct thread *t) |
3c72d654 | 72 | { |
472ad383 DS |
73 | struct pim_instance *pim = THREAD_ARG(t); |
74 | ||
d62a17ae | 75 | if (PIM_DEBUG_MSDP_EVENTS) { |
76 | zlog_debug("MSDP SA advertisment timer expired"); | |
77 | } | |
3c72d654 | 78 | |
472ad383 DS |
79 | pim_msdp_sa_adv_timer_setup(pim, true /* start */); |
80 | pim_msdp_pkt_sa_tx(pim); | |
d62a17ae | 81 | return 0; |
3c72d654 | 82 | } |
472ad383 | 83 | static void pim_msdp_sa_adv_timer_setup(struct pim_instance *pim, bool start) |
3c72d654 | 84 | { |
472ad383 | 85 | THREAD_OFF(pim->msdp.sa_adv_timer); |
d62a17ae | 86 | if (start) { |
472ad383 DS |
87 | thread_add_timer(pim->msdp.master, pim_msdp_sa_adv_timer_cb, |
88 | pim, PIM_MSDP_SA_ADVERTISMENT_TIME, | |
89 | &pim->msdp.sa_adv_timer); | |
d62a17ae | 90 | } |
3c72d654 | 91 | } |
92 | ||
93 | /* RFC-3618:Sec-5.3 - SA cache state timer */ | |
d62a17ae | 94 | static int pim_msdp_sa_state_timer_cb(struct thread *t) |
3c72d654 | 95 | { |
d62a17ae | 96 | struct pim_msdp_sa *sa; |
3c72d654 | 97 | |
d62a17ae | 98 | sa = THREAD_ARG(t); |
3c72d654 | 99 | |
d62a17ae | 100 | if (PIM_DEBUG_MSDP_EVENTS) { |
101 | pim_msdp_sa_timer_expiry_log(sa, "state"); | |
102 | } | |
3c72d654 | 103 | |
d62a17ae | 104 | pim_msdp_sa_deref(sa, PIM_MSDP_SAF_PEER); |
105 | return 0; | |
3c72d654 | 106 | } |
d62a17ae | 107 | static void pim_msdp_sa_state_timer_setup(struct pim_msdp_sa *sa, bool start) |
3c72d654 | 108 | { |
d62a17ae | 109 | THREAD_OFF(sa->sa_state_timer); |
110 | if (start) { | |
472ad383 DS |
111 | thread_add_timer(sa->pim->msdp.master, |
112 | pim_msdp_sa_state_timer_cb, sa, | |
113 | PIM_MSDP_SA_HOLD_TIME, &sa->sa_state_timer); | |
d62a17ae | 114 | } |
3c72d654 | 115 | } |
116 | ||
d62a17ae | 117 | static void pim_msdp_sa_upstream_del(struct pim_msdp_sa *sa) |
7667c556 | 118 | { |
d62a17ae | 119 | struct pim_upstream *up = sa->up; |
120 | if (!up) { | |
121 | return; | |
122 | } | |
7667c556 | 123 | |
d62a17ae | 124 | sa->up = NULL; |
125 | if (PIM_UPSTREAM_FLAG_TEST_SRC_MSDP(up->flags)) { | |
126 | PIM_UPSTREAM_FLAG_UNSET_SRC_MSDP(up->flags); | |
127 | sa->flags |= PIM_MSDP_SAF_UP_DEL_IN_PROG; | |
472ad383 | 128 | pim_upstream_del(sa->pim, up, __PRETTY_FUNCTION__); |
d62a17ae | 129 | sa->flags &= ~PIM_MSDP_SAF_UP_DEL_IN_PROG; |
130 | } | |
7667c556 | 131 | |
d62a17ae | 132 | if (PIM_DEBUG_MSDP_EVENTS) { |
133 | zlog_debug("MSDP SA %s de-referenced SPT", sa->sg_str); | |
134 | } | |
7667c556 | 135 | } |
136 | ||
d62a17ae | 137 | static bool pim_msdp_sa_upstream_add_ok(struct pim_msdp_sa *sa, |
138 | struct pim_upstream *xg_up) | |
7667c556 | 139 | { |
d62a17ae | 140 | if (!(sa->flags & PIM_MSDP_SAF_PEER)) { |
141 | /* SA should have been rxed from a peer */ | |
142 | return false; | |
143 | } | |
144 | /* check if we are RP */ | |
472ad383 | 145 | if (!I_am_RP(sa->pim, sa->sg.grp)) { |
d62a17ae | 146 | return false; |
147 | } | |
7667c556 | 148 | |
d62a17ae | 149 | /* check if we have a (*, G) with a non-empty immediate OIL */ |
150 | if (!xg_up) { | |
151 | struct prefix_sg sg; | |
7667c556 | 152 | |
d62a17ae | 153 | memset(&sg, 0, sizeof(sg)); |
154 | sg.grp = sa->sg.grp; | |
7667c556 | 155 | |
472ad383 | 156 | xg_up = pim_upstream_find(sa->pim, &sg); |
d62a17ae | 157 | } |
158 | if (!xg_up || (xg_up->join_state != PIM_UPSTREAM_JOINED)) { | |
159 | /* join desired will be true for such (*, G) entries so we will | |
160 | * just look at join_state and let the PIM state machine do the | |
161 | * rest of | |
162 | * the magic */ | |
163 | return false; | |
164 | } | |
7667c556 | 165 | |
d62a17ae | 166 | return true; |
7667c556 | 167 | } |
168 | ||
169 | /* Upstream add evaluation needs to happen everytime - | |
170 | * 1. Peer reference is added or removed. | |
1bf16443 | 171 | * 2. The RP for a group changes. |
172 | * 3. joinDesired for the associated (*, G) changes | |
173 | * 4. associated (*, G) is removed - this seems like a bit redundant | |
7667c556 | 174 | * (considering #4); but just in case an entry gets nuked without |
175 | * upstream state transition | |
176 | * */ | |
d62a17ae | 177 | static void pim_msdp_sa_upstream_update(struct pim_msdp_sa *sa, |
178 | struct pim_upstream *xg_up, | |
179 | const char *ctx) | |
180 | { | |
181 | struct pim_upstream *up; | |
182 | ||
183 | if (!pim_msdp_sa_upstream_add_ok(sa, xg_up)) { | |
184 | pim_msdp_sa_upstream_del(sa); | |
185 | return; | |
186 | } | |
187 | ||
188 | if (sa->up) { | |
189 | /* nothing to do */ | |
190 | return; | |
191 | } | |
192 | ||
472ad383 | 193 | up = pim_upstream_find(sa->pim, &sa->sg); |
d62a17ae | 194 | if (up && (PIM_UPSTREAM_FLAG_TEST_SRC_MSDP(up->flags))) { |
195 | /* somehow we lost track of the upstream ptr? best log it */ | |
196 | sa->up = up; | |
197 | if (PIM_DEBUG_MSDP_EVENTS) { | |
198 | zlog_debug("MSDP SA %s SPT reference missing", | |
199 | sa->sg_str); | |
200 | } | |
201 | return; | |
202 | } | |
203 | ||
204 | /* RFC3618: "RP triggers a (S, G) join event towards the data source | |
205 | * as if a JP message was rxed addressed to the RP itself." */ | |
2002dcdb | 206 | up = pim_upstream_add(sa->pim, &sa->sg, NULL /* iif */, |
d62a17ae | 207 | PIM_UPSTREAM_FLAG_MASK_SRC_MSDP, |
0885a9f1 | 208 | __PRETTY_FUNCTION__, NULL); |
d62a17ae | 209 | |
210 | sa->up = up; | |
211 | if (up) { | |
212 | /* update inherited oil */ | |
472ad383 | 213 | pim_upstream_inherited_olist(sa->pim, up); |
d62a17ae | 214 | /* should we also start the kat in parallel? we will need it |
215 | * when the | |
216 | * SA ages out */ | |
217 | if (PIM_DEBUG_MSDP_EVENTS) { | |
218 | zlog_debug("MSDP SA %s referenced SPT", sa->sg_str); | |
219 | } | |
220 | } else { | |
221 | if (PIM_DEBUG_MSDP_EVENTS) { | |
222 | zlog_debug("MSDP SA %s SPT reference failed", | |
223 | sa->sg_str); | |
224 | } | |
225 | } | |
7667c556 | 226 | } |
227 | ||
3c72d654 | 228 | /* release all mem associated with a sa */ |
d62a17ae | 229 | static void pim_msdp_sa_free(struct pim_msdp_sa *sa) |
3c72d654 | 230 | { |
ec2f0e53 DS |
231 | pim_msdp_sa_state_timer_setup(sa, false); |
232 | ||
d62a17ae | 233 | XFREE(MTYPE_PIM_MSDP_SA, sa); |
3c72d654 | 234 | } |
235 | ||
472ad383 DS |
236 | static struct pim_msdp_sa *pim_msdp_sa_new(struct pim_instance *pim, |
237 | struct prefix_sg *sg, | |
d62a17ae | 238 | struct in_addr rp) |
3c72d654 | 239 | { |
d62a17ae | 240 | struct pim_msdp_sa *sa; |
3c72d654 | 241 | |
d62a17ae | 242 | sa = XCALLOC(MTYPE_PIM_MSDP_SA, sizeof(*sa)); |
243 | if (!sa) { | |
244 | zlog_err("%s: PIM XCALLOC(%zu) failure", __PRETTY_FUNCTION__, | |
245 | sizeof(*sa)); | |
246 | return NULL; | |
247 | } | |
3c72d654 | 248 | |
472ad383 | 249 | sa->pim = pim; |
d62a17ae | 250 | sa->sg = *sg; |
251 | pim_str_sg_set(sg, sa->sg_str); | |
252 | sa->rp = rp; | |
253 | sa->uptime = pim_time_monotonic_sec(); | |
3c72d654 | 254 | |
d62a17ae | 255 | /* insert into misc tables for easy access */ |
472ad383 | 256 | sa = hash_get(pim->msdp.sa_hash, sa, hash_alloc_intern); |
472ad383 | 257 | listnode_add_sort(pim->msdp.sa_list, sa); |
3c72d654 | 258 | |
d62a17ae | 259 | if (PIM_DEBUG_MSDP_EVENTS) { |
260 | zlog_debug("MSDP SA %s created", sa->sg_str); | |
261 | } | |
3c72d654 | 262 | |
d62a17ae | 263 | return sa; |
3c72d654 | 264 | } |
265 | ||
472ad383 DS |
266 | static struct pim_msdp_sa *pim_msdp_sa_find(struct pim_instance *pim, |
267 | struct prefix_sg *sg) | |
3c72d654 | 268 | { |
d62a17ae | 269 | struct pim_msdp_sa lookup; |
3c72d654 | 270 | |
d62a17ae | 271 | lookup.sg = *sg; |
472ad383 | 272 | return hash_lookup(pim->msdp.sa_hash, &lookup); |
3c72d654 | 273 | } |
274 | ||
472ad383 DS |
275 | static struct pim_msdp_sa *pim_msdp_sa_add(struct pim_instance *pim, |
276 | struct prefix_sg *sg, | |
d62a17ae | 277 | struct in_addr rp) |
3c72d654 | 278 | { |
d62a17ae | 279 | struct pim_msdp_sa *sa; |
3c72d654 | 280 | |
472ad383 | 281 | sa = pim_msdp_sa_find(pim, sg); |
d62a17ae | 282 | if (sa) { |
283 | return sa; | |
284 | } | |
3c72d654 | 285 | |
472ad383 | 286 | return pim_msdp_sa_new(pim, sg, rp); |
3c72d654 | 287 | } |
288 | ||
d62a17ae | 289 | static void pim_msdp_sa_del(struct pim_msdp_sa *sa) |
3c72d654 | 290 | { |
d62a17ae | 291 | /* this is somewhat redundant - still want to be careful not to leave |
292 | * stale upstream references */ | |
293 | pim_msdp_sa_upstream_del(sa); | |
7667c556 | 294 | |
d62a17ae | 295 | /* stop timers */ |
296 | pim_msdp_sa_state_timer_setup(sa, false /* start */); | |
3c72d654 | 297 | |
d62a17ae | 298 | /* remove the entry from various tables */ |
472ad383 DS |
299 | listnode_delete(sa->pim->msdp.sa_list, sa); |
300 | hash_release(sa->pim->msdp.sa_hash, sa); | |
3c72d654 | 301 | |
d62a17ae | 302 | if (PIM_DEBUG_MSDP_EVENTS) { |
303 | zlog_debug("MSDP SA %s deleted", sa->sg_str); | |
304 | } | |
3c72d654 | 305 | |
d62a17ae | 306 | /* free up any associated memory */ |
307 | pim_msdp_sa_free(sa); | |
3c72d654 | 308 | } |
309 | ||
d62a17ae | 310 | static void pim_msdp_sa_peer_ip_set(struct pim_msdp_sa *sa, |
311 | struct pim_msdp_peer *mp, struct in_addr rp) | |
15ad0c71 | 312 | { |
d62a17ae | 313 | struct pim_msdp_peer *old_mp; |
15ad0c71 | 314 | |
d62a17ae | 315 | /* optimize the "no change" case as it will happen |
316 | * frequently/periodically */ | |
317 | if (mp && (sa->peer.s_addr == mp->peer.s_addr)) { | |
318 | return; | |
319 | } | |
15ad0c71 | 320 | |
d62a17ae | 321 | /* any time the peer ip changes also update the rp address */ |
322 | if (PIM_INADDR_ISNOT_ANY(sa->peer)) { | |
472ad383 | 323 | old_mp = pim_msdp_peer_find(sa->pim, sa->peer); |
d62a17ae | 324 | if (old_mp && old_mp->sa_cnt) { |
325 | --old_mp->sa_cnt; | |
326 | } | |
327 | } | |
15ad0c71 | 328 | |
d62a17ae | 329 | if (mp) { |
330 | ++mp->sa_cnt; | |
331 | sa->peer = mp->peer; | |
332 | } else { | |
333 | sa->peer.s_addr = PIM_NET_INADDR_ANY; | |
334 | } | |
335 | sa->rp = rp; | |
15ad0c71 | 336 | } |
337 | ||
3c72d654 | 338 | /* When a local active-source is removed there is no way to withdraw the |
339 | * source from peers. We will simply remove it from the SA cache so it will | |
340 | * not be sent in supsequent SA updates. Peers will consequently timeout the | |
341 | * SA. | |
342 | * Similarly a "peer-added" SA is never explicitly deleted. It is simply | |
d62a17ae | 343 | * aged out overtime if not seen in the SA updates from the peers. |
3c72d654 | 344 | * XXX: should we provide a knob to drop entries learnt from a peer when the |
345 | * peer goes down? */ | |
d62a17ae | 346 | static void pim_msdp_sa_deref(struct pim_msdp_sa *sa, |
347 | enum pim_msdp_sa_flags flags) | |
348 | { | |
349 | bool update_up = false; | |
350 | ||
351 | if ((sa->flags & PIM_MSDP_SAF_LOCAL)) { | |
352 | if (flags & PIM_MSDP_SAF_LOCAL) { | |
353 | if (PIM_DEBUG_MSDP_EVENTS) { | |
354 | zlog_debug("MSDP SA %s local reference removed", | |
355 | sa->sg_str); | |
356 | } | |
472ad383 DS |
357 | if (sa->pim->msdp.local_cnt) |
358 | --sa->pim->msdp.local_cnt; | |
d62a17ae | 359 | } |
360 | } | |
361 | ||
362 | if ((sa->flags & PIM_MSDP_SAF_PEER)) { | |
363 | if (flags & PIM_MSDP_SAF_PEER) { | |
364 | struct in_addr rp; | |
365 | ||
366 | if (PIM_DEBUG_MSDP_EVENTS) { | |
367 | zlog_debug("MSDP SA %s peer reference removed", | |
368 | sa->sg_str); | |
369 | } | |
370 | pim_msdp_sa_state_timer_setup(sa, false /* start */); | |
371 | rp.s_addr = INADDR_ANY; | |
372 | pim_msdp_sa_peer_ip_set(sa, NULL /* mp */, rp); | |
373 | /* if peer ref was removed we need to remove the msdp | |
374 | * reference on the | |
375 | * msdp entry */ | |
376 | update_up = true; | |
377 | } | |
378 | } | |
379 | ||
380 | sa->flags &= ~flags; | |
381 | if (update_up) { | |
382 | pim_msdp_sa_upstream_update(sa, NULL /* xg_up */, "sa-deref"); | |
383 | } | |
384 | ||
385 | if (!(sa->flags & PIM_MSDP_SAF_REF)) { | |
386 | pim_msdp_sa_del(sa); | |
387 | } | |
388 | } | |
389 | ||
472ad383 DS |
390 | void pim_msdp_sa_ref(struct pim_instance *pim, struct pim_msdp_peer *mp, |
391 | struct prefix_sg *sg, struct in_addr rp) | |
d62a17ae | 392 | { |
393 | struct pim_msdp_sa *sa; | |
394 | ||
472ad383 | 395 | sa = pim_msdp_sa_add(pim, sg, rp); |
d62a17ae | 396 | if (!sa) { |
397 | return; | |
398 | } | |
399 | ||
400 | /* reference it */ | |
401 | if (mp) { | |
402 | if (!(sa->flags & PIM_MSDP_SAF_PEER)) { | |
403 | sa->flags |= PIM_MSDP_SAF_PEER; | |
404 | if (PIM_DEBUG_MSDP_EVENTS) { | |
405 | zlog_debug("MSDP SA %s added by peer", | |
406 | sa->sg_str); | |
407 | } | |
408 | } | |
409 | pim_msdp_sa_peer_ip_set(sa, mp, rp); | |
410 | /* start/re-start the state timer to prevent cache expiry */ | |
411 | pim_msdp_sa_state_timer_setup(sa, true /* start */); | |
412 | /* We re-evaluate SA "SPT-trigger" everytime we hear abt it from | |
413 | * a | |
414 | * peer. XXX: If this becomes too much of a periodic overhead we | |
415 | * can make it event based */ | |
416 | pim_msdp_sa_upstream_update(sa, NULL /* xg_up */, "peer-ref"); | |
417 | } else { | |
418 | if (!(sa->flags & PIM_MSDP_SAF_LOCAL)) { | |
419 | sa->flags |= PIM_MSDP_SAF_LOCAL; | |
472ad383 | 420 | ++sa->pim->msdp.local_cnt; |
d62a17ae | 421 | if (PIM_DEBUG_MSDP_EVENTS) { |
422 | zlog_debug("MSDP SA %s added locally", | |
423 | sa->sg_str); | |
424 | } | |
425 | /* send an immediate SA update to peers */ | |
426 | pim_msdp_pkt_sa_tx_one(sa); | |
427 | } | |
428 | sa->flags &= ~PIM_MSDP_SAF_STALE; | |
429 | } | |
3c72d654 | 430 | } |
431 | ||
1bf16443 | 432 | /* The following criteria must be met to originate an SA from the MSDP |
433 | * speaker - | |
434 | * 1. KAT must be running i.e. source is active. | |
435 | * 2. We must be RP for the group. | |
436 | * 3. Source must be registrable to the RP (this is where the RFC is vague | |
437 | * and especially ambiguous in CLOS networks; with anycast RP all sources | |
438 | * are potentially registrable to all RPs in the domain). We assume #3 is | |
439 | * satisfied if - | |
440 | * a. We are also the FHR-DR for the source (OR) | |
441 | * b. We rxed a pim register (null or data encapsulated) within the last | |
442 | * (3 * (1.5 * register_suppression_timer))). | |
443 | */ | |
d62a17ae | 444 | static bool pim_msdp_sa_local_add_ok(struct pim_upstream *up) |
3c72d654 | 445 | { |
472ad383 DS |
446 | struct pim_instance *pim = up->channel_oil->pim; |
447 | ||
448 | if (!(pim->msdp.flags & PIM_MSDPF_ENABLE)) { | |
d62a17ae | 449 | return false; |
450 | } | |
3c72d654 | 451 | |
d62a17ae | 452 | if (!up->t_ka_timer) { |
453 | /* stream is not active */ | |
454 | return false; | |
455 | } | |
1bf16443 | 456 | |
472ad383 | 457 | if (!I_am_RP(pim, up->sg.grp)) { |
d62a17ae | 458 | /* we are not RP for the group */ |
459 | return false; | |
460 | } | |
1bf16443 | 461 | |
d62a17ae | 462 | /* we are the FHR-DR for this stream or we are RP and have seen |
463 | * registers | |
464 | * from a FHR for this source */ | |
465 | if (PIM_UPSTREAM_FLAG_TEST_FHR(up->flags) || up->t_msdp_reg_timer) { | |
466 | return true; | |
467 | } | |
1bf16443 | 468 | |
d62a17ae | 469 | return false; |
1bf16443 | 470 | } |
471 | ||
472ad383 DS |
472 | static void pim_msdp_sa_local_add(struct pim_instance *pim, |
473 | struct prefix_sg *sg) | |
1bf16443 | 474 | { |
d62a17ae | 475 | struct in_addr rp; |
476 | rp.s_addr = 0; | |
472ad383 | 477 | pim_msdp_sa_ref(pim, NULL /* mp */, sg, rp); |
3c72d654 | 478 | } |
479 | ||
472ad383 | 480 | void pim_msdp_sa_local_del(struct pim_instance *pim, struct prefix_sg *sg) |
3c72d654 | 481 | { |
d62a17ae | 482 | struct pim_msdp_sa *sa; |
3c72d654 | 483 | |
472ad383 | 484 | sa = pim_msdp_sa_find(pim, sg); |
d62a17ae | 485 | if (sa) { |
486 | pim_msdp_sa_deref(sa, PIM_MSDP_SAF_LOCAL); | |
487 | } | |
3c72d654 | 488 | } |
489 | ||
36e466fe | 490 | /* we need to be very cautious with this API as SA del too can trigger an |
491 | * upstream del and we will get stuck in a simple loop */ | |
472ad383 DS |
492 | static void pim_msdp_sa_local_del_on_up_del(struct pim_instance *pim, |
493 | struct prefix_sg *sg) | |
d62a17ae | 494 | { |
495 | struct pim_msdp_sa *sa; | |
496 | ||
472ad383 | 497 | sa = pim_msdp_sa_find(pim, sg); |
d62a17ae | 498 | if (sa) { |
499 | if (PIM_DEBUG_MSDP_INTERNAL) { | |
500 | zlog_debug("MSDP local sa %s del on up del", | |
501 | sa->sg_str); | |
502 | } | |
503 | ||
504 | /* if there is no local reference escape */ | |
505 | if (!(sa->flags & PIM_MSDP_SAF_LOCAL)) { | |
506 | if (PIM_DEBUG_MSDP_INTERNAL) { | |
507 | zlog_debug("MSDP local sa %s del; no local ref", | |
508 | sa->sg_str); | |
509 | } | |
510 | return; | |
511 | } | |
512 | ||
513 | if (sa->flags & PIM_MSDP_SAF_UP_DEL_IN_PROG) { | |
514 | /* MSDP is the one that triggered the upstream del. if | |
515 | * this happens | |
516 | * we most certainly have a bug in the PIM upstream | |
517 | * state machine. We | |
518 | * will not have a local reference unless the KAT is | |
519 | * running. And if the | |
520 | * KAT is running there MUST be an additional | |
521 | * source-stream reference to | |
522 | * the flow. Accounting for such cases requires lot of | |
523 | * changes; perhaps | |
524 | * address this in the next release? - XXX */ | |
525 | zlog_err( | |
526 | "MSDP sa %s SPT teardown is causing the local entry to be removed", | |
527 | sa->sg_str); | |
528 | return; | |
529 | } | |
530 | ||
531 | /* we are dropping the sa on upstream del we should not have an | |
532 | * upstream reference */ | |
533 | if (sa->up) { | |
534 | if (PIM_DEBUG_MSDP_INTERNAL) { | |
535 | zlog_debug("MSDP local sa %s del; up non-NULL", | |
536 | sa->sg_str); | |
537 | } | |
538 | sa->up = NULL; | |
539 | } | |
540 | pim_msdp_sa_deref(sa, PIM_MSDP_SAF_LOCAL); | |
541 | } | |
36e466fe | 542 | } |
543 | ||
1bf16443 | 544 | /* Local SA qualification needs to be re-evaluated when - |
545 | * 1. KAT is started or stopped | |
546 | * 2. on RP changes | |
547 | * 3. Whenever FHR status changes for a (S,G) - XXX - currently there | |
548 | * is no clear path to transition an entry out of "MASK_FHR" need | |
549 | * to discuss this with Donald. May result in some strangeness if the | |
550 | * FHR is also the RP. | |
551 | * 4. When msdp_reg timer is started or stopped | |
552 | */ | |
d62a17ae | 553 | void pim_msdp_sa_local_update(struct pim_upstream *up) |
1bf16443 | 554 | { |
472ad383 DS |
555 | struct pim_instance *pim = up->channel_oil->pim; |
556 | ||
d62a17ae | 557 | if (pim_msdp_sa_local_add_ok(up)) { |
472ad383 | 558 | pim_msdp_sa_local_add(pim, &up->sg); |
d62a17ae | 559 | } else { |
472ad383 | 560 | pim_msdp_sa_local_del(pim, &up->sg); |
d62a17ae | 561 | } |
1bf16443 | 562 | } |
563 | ||
472ad383 | 564 | static void pim_msdp_sa_local_setup(struct pim_instance *pim) |
3c72d654 | 565 | { |
d62a17ae | 566 | struct pim_upstream *up; |
567 | struct listnode *up_node; | |
3c72d654 | 568 | |
472ad383 | 569 | for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, up_node, up)) { |
d62a17ae | 570 | pim_msdp_sa_local_update(up); |
571 | } | |
3c72d654 | 572 | } |
573 | ||
7667c556 | 574 | /* whenever the RP changes we need to re-evaluate the "local" SA-cache */ |
575 | /* XXX: needs to be tested */ | |
472ad383 | 576 | void pim_msdp_i_am_rp_changed(struct pim_instance *pim) |
d62a17ae | 577 | { |
578 | struct listnode *sanode; | |
579 | struct listnode *nextnode; | |
580 | struct pim_msdp_sa *sa; | |
581 | ||
472ad383 | 582 | if (!(pim->msdp.flags & PIM_MSDPF_ENABLE)) { |
d62a17ae | 583 | /* if the feature is not enabled do nothing */ |
584 | return; | |
585 | } | |
586 | ||
587 | if (PIM_DEBUG_MSDP_INTERNAL) { | |
588 | zlog_debug("MSDP i_am_rp changed"); | |
589 | } | |
590 | ||
591 | /* mark all local entries as stale */ | |
472ad383 | 592 | for (ALL_LIST_ELEMENTS_RO(pim->msdp.sa_list, sanode, sa)) { |
d62a17ae | 593 | if (sa->flags & PIM_MSDP_SAF_LOCAL) { |
594 | sa->flags |= PIM_MSDP_SAF_STALE; | |
595 | } | |
596 | } | |
597 | ||
598 | /* re-setup local SA entries */ | |
472ad383 | 599 | pim_msdp_sa_local_setup(pim); |
d62a17ae | 600 | |
472ad383 | 601 | for (ALL_LIST_ELEMENTS(pim->msdp.sa_list, sanode, nextnode, sa)) { |
d62a17ae | 602 | /* purge stale SA entries */ |
603 | if (sa->flags & PIM_MSDP_SAF_STALE) { | |
604 | /* clear the stale flag; the entry may be kept even | |
605 | * after | |
606 | * "local-deref" */ | |
607 | sa->flags &= ~PIM_MSDP_SAF_STALE; | |
608 | /* sa_deref can end up freeing the sa; so don't access | |
609 | * contents after */ | |
610 | pim_msdp_sa_deref(sa, PIM_MSDP_SAF_LOCAL); | |
611 | } else { | |
612 | /* if the souce is still active check if we can | |
613 | * influence SPT */ | |
614 | pim_msdp_sa_upstream_update(sa, NULL /* xg_up */, | |
615 | "rp-change"); | |
616 | } | |
617 | } | |
7667c556 | 618 | } |
619 | ||
620 | /* We track the join state of (*, G) entries. If G has sources in the SA-cache | |
621 | * we need to setup or teardown SPT when the JoinDesired status changes for | |
622 | * (*, G) */ | |
1eca8576 DS |
623 | void pim_msdp_up_join_state_changed(struct pim_instance *pim, |
624 | struct pim_upstream *xg_up) | |
d62a17ae | 625 | { |
626 | struct listnode *sanode; | |
627 | struct pim_msdp_sa *sa; | |
628 | ||
629 | if (PIM_DEBUG_MSDP_INTERNAL) { | |
630 | zlog_debug("MSDP join state changed for %s", xg_up->sg_str); | |
631 | } | |
632 | ||
633 | /* If this is not really an XG entry just move on */ | |
634 | if ((xg_up->sg.src.s_addr != INADDR_ANY) | |
635 | || (xg_up->sg.grp.s_addr == INADDR_ANY)) { | |
636 | return; | |
637 | } | |
638 | ||
639 | /* XXX: Need to maintain SAs per-group to avoid all this unnecessary | |
640 | * walking */ | |
472ad383 | 641 | for (ALL_LIST_ELEMENTS_RO(pim->msdp.sa_list, sanode, sa)) { |
d62a17ae | 642 | if (sa->sg.grp.s_addr != xg_up->sg.grp.s_addr) { |
643 | continue; | |
644 | } | |
645 | pim_msdp_sa_upstream_update(sa, xg_up, "up-jp-change"); | |
646 | } | |
647 | } | |
648 | ||
472ad383 | 649 | static void pim_msdp_up_xg_del(struct pim_instance *pim, struct prefix_sg *sg) |
d62a17ae | 650 | { |
651 | struct listnode *sanode; | |
652 | struct pim_msdp_sa *sa; | |
653 | ||
654 | if (PIM_DEBUG_MSDP_INTERNAL) { | |
655 | zlog_debug("MSDP %s del", pim_str_sg_dump(sg)); | |
656 | } | |
657 | ||
658 | /* If this is not really an XG entry just move on */ | |
659 | if ((sg->src.s_addr != INADDR_ANY) || (sg->grp.s_addr == INADDR_ANY)) { | |
660 | return; | |
661 | } | |
662 | ||
663 | /* XXX: Need to maintain SAs per-group to avoid all this unnecessary | |
664 | * walking */ | |
472ad383 | 665 | for (ALL_LIST_ELEMENTS_RO(pim->msdp.sa_list, sanode, sa)) { |
d62a17ae | 666 | if (sa->sg.grp.s_addr != sg->grp.s_addr) { |
667 | continue; | |
668 | } | |
669 | pim_msdp_sa_upstream_update(sa, NULL /* xg */, "up-jp-change"); | |
670 | } | |
671 | } | |
672 | ||
472ad383 | 673 | void pim_msdp_up_del(struct pim_instance *pim, struct prefix_sg *sg) |
d62a17ae | 674 | { |
675 | if (PIM_DEBUG_MSDP_INTERNAL) { | |
676 | zlog_debug("MSDP up %s del", pim_str_sg_dump(sg)); | |
677 | } | |
678 | if (sg->src.s_addr == INADDR_ANY) { | |
472ad383 | 679 | pim_msdp_up_xg_del(pim, sg); |
d62a17ae | 680 | } else { |
472ad383 | 681 | pim_msdp_sa_local_del_on_up_del(pim, sg); |
d62a17ae | 682 | } |
36e466fe | 683 | } |
684 | ||
3c72d654 | 685 | /* sa hash and peer list helpers */ |
d62a17ae | 686 | static unsigned int pim_msdp_sa_hash_key_make(void *p) |
3c72d654 | 687 | { |
d62a17ae | 688 | struct pim_msdp_sa *sa = p; |
3c72d654 | 689 | |
d62a17ae | 690 | return (jhash_2words(sa->sg.src.s_addr, sa->sg.grp.s_addr, 0)); |
3c72d654 | 691 | } |
692 | ||
d62a17ae | 693 | static int pim_msdp_sa_hash_eq(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 | |
d62a17ae | 698 | return ((sa1->sg.src.s_addr == sa2->sg.src.s_addr) |
699 | && (sa1->sg.grp.s_addr == sa2->sg.grp.s_addr)); | |
3c72d654 | 700 | } |
701 | ||
d62a17ae | 702 | static int pim_msdp_sa_comp(const void *p1, const void *p2) |
3c72d654 | 703 | { |
d62a17ae | 704 | const struct pim_msdp_sa *sa1 = p1; |
705 | const struct pim_msdp_sa *sa2 = p2; | |
3c72d654 | 706 | |
d62a17ae | 707 | if (ntohl(sa1->sg.grp.s_addr) < ntohl(sa2->sg.grp.s_addr)) |
708 | return -1; | |
3c72d654 | 709 | |
d62a17ae | 710 | if (ntohl(sa1->sg.grp.s_addr) > ntohl(sa2->sg.grp.s_addr)) |
711 | return 1; | |
3c72d654 | 712 | |
d62a17ae | 713 | if (ntohl(sa1->sg.src.s_addr) < ntohl(sa2->sg.src.s_addr)) |
714 | return -1; | |
3c72d654 | 715 | |
d62a17ae | 716 | if (ntohl(sa1->sg.src.s_addr) > ntohl(sa2->sg.src.s_addr)) |
717 | return 1; | |
3c72d654 | 718 | |
d62a17ae | 719 | return 0; |
3c72d654 | 720 | } |
721 | ||
722 | /* RFC-3618:Sec-10.1.3 - Peer-RPF forwarding */ | |
723 | /* XXX: this can use a bit of refining and extensions */ | |
d62a17ae | 724 | bool pim_msdp_peer_rpf_check(struct pim_msdp_peer *mp, struct in_addr rp) |
3c72d654 | 725 | { |
d62a17ae | 726 | if (mp->peer.s_addr == rp.s_addr) { |
727 | return true; | |
728 | } | |
3c72d654 | 729 | |
d62a17ae | 730 | return false; |
3c72d654 | 731 | } |
d62a17ae | 732 | |
3c72d654 | 733 | /************************ Peer session management **************************/ |
d62a17ae | 734 | char *pim_msdp_state_dump(enum pim_msdp_peer_state state, char *buf, |
735 | int buf_size) | |
736 | { | |
737 | switch (state) { | |
738 | case PIM_MSDP_DISABLED: | |
739 | snprintf(buf, buf_size, "%s", "disabled"); | |
740 | break; | |
741 | case PIM_MSDP_INACTIVE: | |
742 | snprintf(buf, buf_size, "%s", "inactive"); | |
743 | break; | |
744 | case PIM_MSDP_LISTEN: | |
745 | snprintf(buf, buf_size, "%s", "listen"); | |
746 | break; | |
747 | case PIM_MSDP_CONNECTING: | |
748 | snprintf(buf, buf_size, "%s", "connecting"); | |
749 | break; | |
750 | case PIM_MSDP_ESTABLISHED: | |
751 | snprintf(buf, buf_size, "%s", "established"); | |
752 | break; | |
753 | default: | |
754 | snprintf(buf, buf_size, "unk-%d", state); | |
755 | } | |
756 | return buf; | |
757 | } | |
758 | ||
759 | char *pim_msdp_peer_key_dump(struct pim_msdp_peer *mp, char *buf, int buf_size, | |
760 | bool long_format) | |
761 | { | |
762 | char peer_str[INET_ADDRSTRLEN]; | |
763 | char local_str[INET_ADDRSTRLEN]; | |
764 | ||
765 | pim_inet4_dump("<peer?>", mp->peer, peer_str, sizeof(peer_str)); | |
766 | if (long_format) { | |
767 | pim_inet4_dump("<local?>", mp->local, local_str, | |
768 | sizeof(local_str)); | |
769 | snprintf(buf, buf_size, "MSDP peer %s local %s mg %s", peer_str, | |
770 | local_str, mp->mesh_group_name); | |
771 | } else { | |
772 | snprintf(buf, buf_size, "MSDP peer %s", peer_str); | |
773 | } | |
774 | ||
775 | return buf; | |
776 | } | |
777 | ||
778 | static void pim_msdp_peer_state_chg_log(struct pim_msdp_peer *mp) | |
779 | { | |
780 | char state_str[PIM_MSDP_STATE_STRLEN]; | |
781 | ||
782 | pim_msdp_state_dump(mp->state, state_str, sizeof(state_str)); | |
783 | zlog_debug("MSDP peer %s state chg to %s", mp->key_str, state_str); | |
2a333e0f | 784 | } |
785 | ||
786 | /* MSDP Connection State Machine actions (defined in RFC-3618:Sec-11.2) */ | |
787 | /* 11.2.A2: active peer - start connect retry timer; when the timer fires | |
788 | * a tcp connection will be made */ | |
d62a17ae | 789 | static void pim_msdp_peer_connect(struct pim_msdp_peer *mp) |
2a333e0f | 790 | { |
d62a17ae | 791 | mp->state = PIM_MSDP_CONNECTING; |
792 | if (PIM_DEBUG_MSDP_EVENTS) { | |
793 | pim_msdp_peer_state_chg_log(mp); | |
794 | } | |
2a333e0f | 795 | |
d62a17ae | 796 | pim_msdp_peer_cr_timer_setup(mp, true /* start */); |
2a333e0f | 797 | } |
798 | ||
799 | /* 11.2.A3: passive peer - just listen for connections */ | |
d62a17ae | 800 | static void pim_msdp_peer_listen(struct pim_msdp_peer *mp) |
2a333e0f | 801 | { |
d62a17ae | 802 | mp->state = PIM_MSDP_LISTEN; |
803 | if (PIM_DEBUG_MSDP_EVENTS) { | |
804 | pim_msdp_peer_state_chg_log(mp); | |
805 | } | |
2a333e0f | 806 | |
d62a17ae | 807 | /* this is interntionally asymmetric i.e. we set up listen-socket when |
9d303b37 DL |
808 | * the |
809 | * first listening peer is configured; but don't bother tearing it down | |
810 | * when | |
811 | * all the peers go down */ | |
472ad383 | 812 | pim_msdp_sock_listen(mp->pim); |
2a333e0f | 813 | } |
814 | ||
815 | /* 11.2.A4 and 11.2.A5: transition active or passive peer to | |
816 | * established state */ | |
d62a17ae | 817 | void pim_msdp_peer_established(struct pim_msdp_peer *mp) |
2a333e0f | 818 | { |
d62a17ae | 819 | if (mp->state != PIM_MSDP_ESTABLISHED) { |
820 | ++mp->est_flaps; | |
821 | } | |
977d71cc | 822 | |
d62a17ae | 823 | mp->state = PIM_MSDP_ESTABLISHED; |
824 | mp->uptime = pim_time_monotonic_sec(); | |
2a333e0f | 825 | |
d62a17ae | 826 | if (PIM_DEBUG_MSDP_EVENTS) { |
827 | pim_msdp_peer_state_chg_log(mp); | |
828 | } | |
2a333e0f | 829 | |
d62a17ae | 830 | /* stop retry timer on active peers */ |
831 | pim_msdp_peer_cr_timer_setup(mp, false /* start */); | |
2a333e0f | 832 | |
d62a17ae | 833 | /* send KA; start KA and hold timers */ |
834 | pim_msdp_pkt_ka_tx(mp); | |
835 | pim_msdp_peer_ka_timer_setup(mp, true /* start */); | |
836 | pim_msdp_peer_hold_timer_setup(mp, true /* start */); | |
2a333e0f | 837 | |
d62a17ae | 838 | pim_msdp_pkt_sa_tx_to_one_peer(mp); |
3c72d654 | 839 | |
d62a17ae | 840 | PIM_MSDP_PEER_WRITE_ON(mp); |
841 | PIM_MSDP_PEER_READ_ON(mp); | |
2a333e0f | 842 | } |
843 | ||
844 | /* 11.2.A6, 11.2.A7 and 11.2.A8: shutdown the peer tcp connection */ | |
d62a17ae | 845 | void pim_msdp_peer_stop_tcp_conn(struct pim_msdp_peer *mp, bool chg_state) |
846 | { | |
847 | if (chg_state) { | |
848 | if (mp->state == PIM_MSDP_ESTABLISHED) { | |
849 | ++mp->est_flaps; | |
850 | } | |
851 | mp->state = PIM_MSDP_INACTIVE; | |
852 | if (PIM_DEBUG_MSDP_EVENTS) { | |
853 | pim_msdp_peer_state_chg_log(mp); | |
854 | } | |
855 | } | |
856 | ||
857 | if (PIM_DEBUG_MSDP_INTERNAL) { | |
858 | zlog_debug("MSDP peer %s pim_msdp_peer_stop_tcp_conn", | |
859 | mp->key_str); | |
860 | } | |
861 | /* stop read and write threads */ | |
862 | PIM_MSDP_PEER_READ_OFF(mp); | |
863 | PIM_MSDP_PEER_WRITE_OFF(mp); | |
864 | ||
865 | /* reset buffers */ | |
866 | mp->packet_size = 0; | |
867 | if (mp->ibuf) | |
868 | stream_reset(mp->ibuf); | |
869 | if (mp->obuf) | |
870 | stream_fifo_clean(mp->obuf); | |
871 | ||
872 | /* stop all peer timers */ | |
873 | pim_msdp_peer_ka_timer_setup(mp, false /* start */); | |
874 | pim_msdp_peer_cr_timer_setup(mp, false /* start */); | |
875 | pim_msdp_peer_hold_timer_setup(mp, false /* start */); | |
876 | ||
877 | /* close connection */ | |
878 | if (mp->fd >= 0) { | |
879 | close(mp->fd); | |
880 | mp->fd = -1; | |
881 | } | |
2a333e0f | 882 | } |
883 | ||
884 | /* RFC-3618:Sec-5.6 - stop the peer tcp connection and startover */ | |
d62a17ae | 885 | void pim_msdp_peer_reset_tcp_conn(struct pim_msdp_peer *mp, const char *rc_str) |
2a333e0f | 886 | { |
d62a17ae | 887 | if (PIM_DEBUG_EVENTS) { |
888 | zlog_debug("MSDP peer %s tcp reset %s", mp->key_str, rc_str); | |
889 | snprintf(mp->last_reset, sizeof(mp->last_reset), "%s", rc_str); | |
890 | } | |
2a333e0f | 891 | |
d62a17ae | 892 | /* close the connection and transition to listening or connecting */ |
893 | pim_msdp_peer_stop_tcp_conn(mp, true /* chg_state */); | |
894 | if (PIM_MSDP_PEER_IS_LISTENER(mp)) { | |
895 | pim_msdp_peer_listen(mp); | |
896 | } else { | |
897 | pim_msdp_peer_connect(mp); | |
898 | } | |
2a333e0f | 899 | } |
900 | ||
d62a17ae | 901 | static void pim_msdp_peer_timer_expiry_log(struct pim_msdp_peer *mp, |
902 | const char *timer_str) | |
2a333e0f | 903 | { |
d62a17ae | 904 | zlog_debug("MSDP peer %s %s timer expired", mp->key_str, timer_str); |
2a333e0f | 905 | } |
906 | ||
907 | /* RFC-3618:Sec-5.4 - peer hold timer */ | |
d62a17ae | 908 | static int pim_msdp_peer_hold_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, "hold"); | |
916 | } | |
2a333e0f | 917 | |
d62a17ae | 918 | if (mp->state != PIM_MSDP_ESTABLISHED) { |
919 | return 0; | |
920 | } | |
2a333e0f | 921 | |
d62a17ae | 922 | if (PIM_DEBUG_MSDP_EVENTS) { |
923 | pim_msdp_peer_state_chg_log(mp); | |
924 | } | |
925 | pim_msdp_peer_reset_tcp_conn(mp, "ht-expired"); | |
926 | return 0; | |
2a333e0f | 927 | } |
472ad383 | 928 | |
d62a17ae | 929 | static void pim_msdp_peer_hold_timer_setup(struct pim_msdp_peer *mp, bool start) |
2a333e0f | 930 | { |
472ad383 | 931 | struct pim_instance *pim = mp->pim; |
d62a17ae | 932 | THREAD_OFF(mp->hold_timer); |
933 | if (start) { | |
472ad383 | 934 | thread_add_timer(pim->msdp.master, pim_msdp_peer_hold_timer_cb, |
2ad78035 | 935 | mp, PIM_MSDP_PEER_HOLD_TIME, &mp->hold_timer); |
d62a17ae | 936 | } |
2a333e0f | 937 | } |
938 | ||
939 | ||
940 | /* RFC-3618:Sec-5.5 - peer keepalive timer */ | |
d62a17ae | 941 | static int pim_msdp_peer_ka_timer_cb(struct thread *t) |
2a333e0f | 942 | { |
d62a17ae | 943 | struct pim_msdp_peer *mp; |
2a333e0f | 944 | |
d62a17ae | 945 | mp = THREAD_ARG(t); |
2a333e0f | 946 | |
d62a17ae | 947 | if (PIM_DEBUG_MSDP_EVENTS) { |
948 | pim_msdp_peer_timer_expiry_log(mp, "ka"); | |
949 | } | |
2a333e0f | 950 | |
d62a17ae | 951 | pim_msdp_pkt_ka_tx(mp); |
952 | pim_msdp_peer_ka_timer_setup(mp, true /* start */); | |
953 | return 0; | |
2a333e0f | 954 | } |
d62a17ae | 955 | static void pim_msdp_peer_ka_timer_setup(struct pim_msdp_peer *mp, bool start) |
2a333e0f | 956 | { |
d62a17ae | 957 | THREAD_OFF(mp->ka_timer); |
958 | if (start) { | |
472ad383 DS |
959 | thread_add_timer(mp->pim->msdp.master, |
960 | pim_msdp_peer_ka_timer_cb, mp, | |
961 | PIM_MSDP_PEER_KA_TIME, &mp->ka_timer); | |
d62a17ae | 962 | } |
2a333e0f | 963 | } |
964 | ||
d62a17ae | 965 | static void pim_msdp_peer_active_connect(struct pim_msdp_peer *mp) |
2a333e0f | 966 | { |
d62a17ae | 967 | int rc; |
968 | ++mp->conn_attempts; | |
969 | rc = pim_msdp_sock_connect(mp); | |
2a333e0f | 970 | |
d62a17ae | 971 | if (PIM_DEBUG_MSDP_INTERNAL) { |
972 | zlog_debug("MSDP peer %s pim_msdp_peer_active_connect: %d", | |
973 | mp->key_str, rc); | |
974 | } | |
2a333e0f | 975 | |
d62a17ae | 976 | switch (rc) { |
977 | case connect_error: | |
978 | case -1: | |
979 | /* connect failed restart the connect-retry timer */ | |
980 | pim_msdp_peer_cr_timer_setup(mp, true /* start */); | |
981 | break; | |
2a333e0f | 982 | |
d62a17ae | 983 | case connect_success: |
984 | /* connect was sucessful move to established */ | |
985 | pim_msdp_peer_established(mp); | |
986 | break; | |
2a333e0f | 987 | |
d62a17ae | 988 | case connect_in_progress: |
989 | /* for NB content we need to wait till sock is readable or | |
990 | * writeable */ | |
991 | PIM_MSDP_PEER_WRITE_ON(mp); | |
992 | PIM_MSDP_PEER_READ_ON(mp); | |
993 | /* also restart connect-retry timer to reset the socket if | |
994 | * connect is | |
995 | * not sucessful */ | |
996 | pim_msdp_peer_cr_timer_setup(mp, true /* start */); | |
997 | break; | |
998 | } | |
2a333e0f | 999 | } |
1000 | ||
1001 | /* RFC-3618:Sec-5.6 - connection retry on active peer */ | |
d62a17ae | 1002 | static int pim_msdp_peer_cr_timer_cb(struct thread *t) |
2a333e0f | 1003 | { |
d62a17ae | 1004 | struct pim_msdp_peer *mp; |
2a333e0f | 1005 | |
d62a17ae | 1006 | mp = THREAD_ARG(t); |
2a333e0f | 1007 | |
d62a17ae | 1008 | if (PIM_DEBUG_MSDP_EVENTS) { |
1009 | pim_msdp_peer_timer_expiry_log(mp, "connect-retry"); | |
1010 | } | |
2a333e0f | 1011 | |
d62a17ae | 1012 | if (mp->state != PIM_MSDP_CONNECTING || PIM_MSDP_PEER_IS_LISTENER(mp)) { |
1013 | return 0; | |
1014 | } | |
2a333e0f | 1015 | |
d62a17ae | 1016 | pim_msdp_peer_active_connect(mp); |
1017 | return 0; | |
2a333e0f | 1018 | } |
d62a17ae | 1019 | static void pim_msdp_peer_cr_timer_setup(struct pim_msdp_peer *mp, bool start) |
2a333e0f | 1020 | { |
d62a17ae | 1021 | THREAD_OFF(mp->cr_timer); |
1022 | if (start) { | |
472ad383 DS |
1023 | thread_add_timer( |
1024 | mp->pim->msdp.master, pim_msdp_peer_cr_timer_cb, mp, | |
1025 | PIM_MSDP_PEER_CONNECT_RETRY_TIME, &mp->cr_timer); | |
d62a17ae | 1026 | } |
2a333e0f | 1027 | } |
1028 | ||
1029 | /* if a valid packet is rxed from the peer we can restart hold timer */ | |
d62a17ae | 1030 | void pim_msdp_peer_pkt_rxed(struct pim_msdp_peer *mp) |
2a333e0f | 1031 | { |
d62a17ae | 1032 | if (mp->state == PIM_MSDP_ESTABLISHED) { |
1033 | pim_msdp_peer_hold_timer_setup(mp, true /* start */); | |
1034 | } | |
2a333e0f | 1035 | } |
1036 | ||
3c72d654 | 1037 | /* if a valid packet is txed to the peer we can restart ka timer and avoid |
1038 | * unnecessary ka noise in the network */ | |
d62a17ae | 1039 | void pim_msdp_peer_pkt_txed(struct pim_msdp_peer *mp) |
3c72d654 | 1040 | { |
d62a17ae | 1041 | if (mp->state == PIM_MSDP_ESTABLISHED) { |
1042 | pim_msdp_peer_ka_timer_setup(mp, true /* start */); | |
1043 | if (PIM_DEBUG_MSDP_INTERNAL) { | |
1044 | zlog_debug("MSDP ka timer restart on pkt tx to %s", | |
1045 | mp->key_str); | |
1046 | } | |
1047 | } | |
3c72d654 | 1048 | } |
1049 | ||
2a333e0f | 1050 | static void pim_msdp_addr2su(union sockunion *su, struct in_addr addr) |
1051 | { | |
d62a17ae | 1052 | sockunion_init(su); |
1053 | su->sin.sin_addr = addr; | |
1054 | su->sin.sin_family = AF_INET; | |
2a333e0f | 1055 | #ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN |
d62a17ae | 1056 | su->sin.sin_len = sizeof(struct sockaddr_in); |
2a333e0f | 1057 | #endif /* HAVE_STRUCT_SOCKADDR_IN_SIN_LEN */ |
1058 | } | |
1059 | ||
1060 | /* 11.2.A1: create a new peer and transition state to listen or connecting */ | |
472ad383 DS |
1061 | static enum pim_msdp_err pim_msdp_peer_new(struct pim_instance *pim, |
1062 | struct in_addr peer_addr, | |
d62a17ae | 1063 | struct in_addr local_addr, |
1064 | const char *mesh_group_name, | |
1065 | struct pim_msdp_peer **mp_p) | |
1066 | { | |
1067 | struct pim_msdp_peer *mp; | |
1068 | ||
472ad383 | 1069 | pim_msdp_enable(pim); |
d62a17ae | 1070 | |
1071 | mp = XCALLOC(MTYPE_PIM_MSDP_PEER, sizeof(*mp)); | |
1072 | if (!mp) { | |
1073 | zlog_err("%s: PIM XCALLOC(%zu) failure", __PRETTY_FUNCTION__, | |
1074 | sizeof(*mp)); | |
1075 | return PIM_MSDP_ERR_OOM; | |
1076 | } | |
1077 | ||
472ad383 | 1078 | mp->pim = pim; |
d62a17ae | 1079 | mp->peer = peer_addr; |
1080 | pim_inet4_dump("<peer?>", mp->peer, mp->key_str, sizeof(mp->key_str)); | |
1081 | pim_msdp_addr2su(&mp->su_peer, mp->peer); | |
1082 | mp->local = local_addr; | |
1083 | /* XXX: originator_id setting needs to move to the mesh group */ | |
472ad383 | 1084 | pim->msdp.originator_id = local_addr; |
d62a17ae | 1085 | pim_msdp_addr2su(&mp->su_local, mp->local); |
1086 | mp->mesh_group_name = XSTRDUP(MTYPE_PIM_MSDP_MG_NAME, mesh_group_name); | |
1087 | mp->state = PIM_MSDP_INACTIVE; | |
1088 | mp->fd = -1; | |
1089 | strcpy(mp->last_reset, "-"); | |
1090 | /* higher IP address is listener */ | |
1091 | if (ntohl(mp->local.s_addr) > ntohl(mp->peer.s_addr)) { | |
1092 | mp->flags |= PIM_MSDP_PEERF_LISTENER; | |
1093 | } | |
1094 | ||
1095 | /* setup packet buffers */ | |
1096 | mp->ibuf = stream_new(PIM_MSDP_MAX_PACKET_SIZE); | |
1097 | mp->obuf = stream_fifo_new(); | |
1098 | ||
1099 | /* insert into misc tables for easy access */ | |
472ad383 DS |
1100 | mp = hash_get(pim->msdp.peer_hash, mp, hash_alloc_intern); |
1101 | listnode_add_sort(pim->msdp.peer_list, mp); | |
d62a17ae | 1102 | |
1103 | if (PIM_DEBUG_MSDP_EVENTS) { | |
1104 | zlog_debug("MSDP peer %s created", mp->key_str); | |
1105 | ||
1106 | pim_msdp_peer_state_chg_log(mp); | |
1107 | } | |
1108 | ||
1109 | /* fireup the connect state machine */ | |
1110 | if (PIM_MSDP_PEER_IS_LISTENER(mp)) { | |
1111 | pim_msdp_peer_listen(mp); | |
1112 | } else { | |
1113 | pim_msdp_peer_connect(mp); | |
1114 | } | |
1115 | if (mp_p) { | |
1116 | *mp_p = mp; | |
1117 | } | |
1118 | return PIM_MSDP_ERR_NONE; | |
1119 | } | |
1120 | ||
472ad383 DS |
1121 | struct pim_msdp_peer *pim_msdp_peer_find(struct pim_instance *pim, |
1122 | struct in_addr peer_addr) | |
d62a17ae | 1123 | { |
1124 | struct pim_msdp_peer lookup; | |
1125 | ||
1126 | lookup.peer = peer_addr; | |
472ad383 | 1127 | return hash_lookup(pim->msdp.peer_hash, &lookup); |
2a333e0f | 1128 | } |
1129 | ||
1130 | /* add peer configuration if it doesn't already exist */ | |
472ad383 DS |
1131 | enum pim_msdp_err pim_msdp_peer_add(struct pim_instance *pim, |
1132 | struct in_addr peer_addr, | |
d62a17ae | 1133 | struct in_addr local_addr, |
1134 | const char *mesh_group_name, | |
1135 | struct pim_msdp_peer **mp_p) | |
2a333e0f | 1136 | { |
d62a17ae | 1137 | struct pim_msdp_peer *mp; |
2a333e0f | 1138 | |
d62a17ae | 1139 | if (mp_p) { |
1140 | *mp_p = NULL; | |
1141 | } | |
977d71cc | 1142 | |
d62a17ae | 1143 | if (peer_addr.s_addr == local_addr.s_addr) { |
1144 | /* skip session setup if config is invalid */ | |
1145 | if (PIM_DEBUG_MSDP_EVENTS) { | |
1146 | char peer_str[INET_ADDRSTRLEN]; | |
977d71cc | 1147 | |
d62a17ae | 1148 | pim_inet4_dump("<peer?>", peer_addr, peer_str, |
1149 | sizeof(peer_str)); | |
1150 | zlog_debug("%s add skipped as DIP=SIP", peer_str); | |
1151 | } | |
1152 | return PIM_MSDP_ERR_SIP_EQ_DIP; | |
1153 | } | |
977d71cc | 1154 | |
472ad383 | 1155 | mp = pim_msdp_peer_find(pim, peer_addr); |
d62a17ae | 1156 | if (mp) { |
1157 | if (mp_p) { | |
1158 | *mp_p = mp; | |
1159 | } | |
1160 | return PIM_MSDP_ERR_PEER_EXISTS; | |
1161 | } | |
2a333e0f | 1162 | |
472ad383 DS |
1163 | return pim_msdp_peer_new(pim, peer_addr, local_addr, mesh_group_name, |
1164 | mp_p); | |
2a333e0f | 1165 | } |
1166 | ||
1167 | /* release all mem associated with a peer */ | |
d62a17ae | 1168 | static void pim_msdp_peer_free(struct pim_msdp_peer *mp) |
11128587 | 1169 | { |
ec2f0e53 DS |
1170 | /* |
1171 | * Let's make sure we are not running when we delete | |
1172 | * the underlying data structure | |
1173 | */ | |
845d9af7 | 1174 | pim_msdp_peer_stop_tcp_conn(mp, false); |
ec2f0e53 | 1175 | |
d62a17ae | 1176 | if (mp->ibuf) { |
1177 | stream_free(mp->ibuf); | |
1178 | } | |
2a333e0f | 1179 | |
d62a17ae | 1180 | if (mp->obuf) { |
1181 | stream_fifo_free(mp->obuf); | |
1182 | } | |
2a333e0f | 1183 | |
d62a17ae | 1184 | if (mp->mesh_group_name) { |
1185 | XFREE(MTYPE_PIM_MSDP_MG_NAME, mp->mesh_group_name); | |
1186 | } | |
845d9af7 DS |
1187 | |
1188 | mp->pim = NULL; | |
d62a17ae | 1189 | XFREE(MTYPE_PIM_MSDP_PEER, mp); |
2a333e0f | 1190 | } |
1191 | ||
1192 | /* delete the peer config */ | |
d62a17ae | 1193 | static enum pim_msdp_err pim_msdp_peer_do_del(struct pim_msdp_peer *mp) |
2a333e0f | 1194 | { |
d62a17ae | 1195 | /* stop the tcp connection and shutdown all timers */ |
1196 | pim_msdp_peer_stop_tcp_conn(mp, true /* chg_state */); | |
2a333e0f | 1197 | |
d62a17ae | 1198 | /* remove the session from various tables */ |
472ad383 DS |
1199 | listnode_delete(mp->pim->msdp.peer_list, mp); |
1200 | hash_release(mp->pim->msdp.peer_hash, mp); | |
2a333e0f | 1201 | |
d62a17ae | 1202 | if (PIM_DEBUG_MSDP_EVENTS) { |
1203 | zlog_debug("MSDP peer %s deleted", mp->key_str); | |
1204 | } | |
2a333e0f | 1205 | |
d62a17ae | 1206 | /* free up any associated memory */ |
1207 | pim_msdp_peer_free(mp); | |
2a333e0f | 1208 | |
d62a17ae | 1209 | return PIM_MSDP_ERR_NONE; |
2a333e0f | 1210 | } |
1211 | ||
472ad383 DS |
1212 | enum pim_msdp_err pim_msdp_peer_del(struct pim_instance *pim, |
1213 | struct in_addr peer_addr) | |
977d71cc | 1214 | { |
d62a17ae | 1215 | struct pim_msdp_peer *mp; |
977d71cc | 1216 | |
472ad383 | 1217 | mp = pim_msdp_peer_find(pim, peer_addr); |
d62a17ae | 1218 | if (!mp) { |
1219 | return PIM_MSDP_ERR_NO_PEER; | |
1220 | } | |
977d71cc | 1221 | |
d62a17ae | 1222 | return pim_msdp_peer_do_del(mp); |
977d71cc | 1223 | } |
1224 | ||
2a333e0f | 1225 | /* peer hash and peer list helpers */ |
d62a17ae | 1226 | static unsigned int pim_msdp_peer_hash_key_make(void *p) |
2a333e0f | 1227 | { |
d62a17ae | 1228 | struct pim_msdp_peer *mp = p; |
1229 | return (jhash_1word(mp->peer.s_addr, 0)); | |
2a333e0f | 1230 | } |
1231 | ||
d62a17ae | 1232 | static int pim_msdp_peer_hash_eq(const void *p1, const void *p2) |
2a333e0f | 1233 | { |
d62a17ae | 1234 | const struct pim_msdp_peer *mp1 = p1; |
1235 | const struct pim_msdp_peer *mp2 = p2; | |
2a333e0f | 1236 | |
d62a17ae | 1237 | return (mp1->peer.s_addr == mp2->peer.s_addr); |
2a333e0f | 1238 | } |
1239 | ||
d62a17ae | 1240 | static int pim_msdp_peer_comp(const void *p1, const void *p2) |
2a333e0f | 1241 | { |
d62a17ae | 1242 | const struct pim_msdp_peer *mp1 = p1; |
1243 | const struct pim_msdp_peer *mp2 = p2; | |
2a333e0f | 1244 | |
d62a17ae | 1245 | if (ntohl(mp1->peer.s_addr) < ntohl(mp2->peer.s_addr)) |
1246 | return -1; | |
2a333e0f | 1247 | |
d62a17ae | 1248 | if (ntohl(mp1->peer.s_addr) > ntohl(mp2->peer.s_addr)) |
1249 | return 1; | |
2a333e0f | 1250 | |
d62a17ae | 1251 | return 0; |
2a333e0f | 1252 | } |
1253 | ||
977d71cc | 1254 | /************************** Mesh group management **************************/ |
472ad383 | 1255 | static void pim_msdp_mg_free(struct pim_instance *pim, struct pim_msdp_mg *mg) |
977d71cc | 1256 | { |
d62a17ae | 1257 | /* If the mesh-group has valid member or src_ip don't delete it */ |
1258 | if (!mg || mg->mbr_cnt || (mg->src_ip.s_addr != INADDR_ANY)) { | |
1259 | return; | |
1260 | } | |
977d71cc | 1261 | |
d62a17ae | 1262 | if (PIM_DEBUG_MSDP_EVENTS) { |
1263 | zlog_debug("MSDP mesh-group %s deleted", mg->mesh_group_name); | |
1264 | } | |
1265 | if (mg->mesh_group_name) | |
1266 | XFREE(MTYPE_PIM_MSDP_MG_NAME, mg->mesh_group_name); | |
977d71cc | 1267 | |
d62a17ae | 1268 | if (mg->mbr_list) |
affe9e99 | 1269 | list_delete_and_null(&mg->mbr_list); |
b9b1e1f2 | 1270 | |
d62a17ae | 1271 | XFREE(MTYPE_PIM_MSDP_MG, mg); |
472ad383 | 1272 | pim->msdp.mg = NULL; |
977d71cc | 1273 | } |
1274 | ||
d62a17ae | 1275 | static struct pim_msdp_mg *pim_msdp_mg_new(const char *mesh_group_name) |
977d71cc | 1276 | { |
d62a17ae | 1277 | struct pim_msdp_mg *mg; |
977d71cc | 1278 | |
d62a17ae | 1279 | mg = XCALLOC(MTYPE_PIM_MSDP_MG, sizeof(*mg)); |
1280 | if (!mg) { | |
1281 | zlog_err("%s: PIM XCALLOC(%zu) failure", __PRETTY_FUNCTION__, | |
1282 | sizeof(*mg)); | |
1283 | return NULL; | |
1284 | } | |
977d71cc | 1285 | |
d62a17ae | 1286 | mg->mesh_group_name = XSTRDUP(MTYPE_PIM_MSDP_MG_NAME, mesh_group_name); |
1287 | mg->mbr_list = list_new(); | |
1288 | mg->mbr_list->del = (void (*)(void *))pim_msdp_mg_mbr_free; | |
1289 | mg->mbr_list->cmp = (int (*)(void *, void *))pim_msdp_mg_mbr_comp; | |
977d71cc | 1290 | |
d62a17ae | 1291 | if (PIM_DEBUG_MSDP_EVENTS) { |
1292 | zlog_debug("MSDP mesh-group %s created", mg->mesh_group_name); | |
1293 | } | |
1294 | return mg; | |
977d71cc | 1295 | } |
1296 | ||
472ad383 DS |
1297 | enum pim_msdp_err pim_msdp_mg_del(struct pim_instance *pim, |
1298 | const char *mesh_group_name) | |
977d71cc | 1299 | { |
472ad383 | 1300 | struct pim_msdp_mg *mg = pim->msdp.mg; |
d62a17ae | 1301 | struct pim_msdp_mg_mbr *mbr; |
977d71cc | 1302 | |
d62a17ae | 1303 | if (!mg || strcmp(mg->mesh_group_name, mesh_group_name)) { |
1304 | return PIM_MSDP_ERR_NO_MG; | |
1305 | } | |
977d71cc | 1306 | |
d62a17ae | 1307 | /* delete all the mesh-group members */ |
1308 | while (!list_isempty(mg->mbr_list)) { | |
1309 | mbr = listnode_head(mg->mbr_list); | |
1310 | pim_msdp_mg_mbr_do_del(mg, mbr); | |
1311 | } | |
977d71cc | 1312 | |
d62a17ae | 1313 | /* clear src ip */ |
1314 | mg->src_ip.s_addr = INADDR_ANY; | |
977d71cc | 1315 | |
d62a17ae | 1316 | /* free up the mesh-group */ |
472ad383 | 1317 | pim_msdp_mg_free(pim, mg); |
d62a17ae | 1318 | return PIM_MSDP_ERR_NONE; |
977d71cc | 1319 | } |
1320 | ||
472ad383 DS |
1321 | static enum pim_msdp_err pim_msdp_mg_add(struct pim_instance *pim, |
1322 | const char *mesh_group_name) | |
977d71cc | 1323 | { |
472ad383 DS |
1324 | if (pim->msdp.mg) { |
1325 | if (!strcmp(pim->msdp.mg->mesh_group_name, mesh_group_name)) { | |
d62a17ae | 1326 | return PIM_MSDP_ERR_NONE; |
1327 | } | |
1328 | /* currently only one mesh-group can exist at a time */ | |
1329 | return PIM_MSDP_ERR_MAX_MESH_GROUPS; | |
1330 | } | |
977d71cc | 1331 | |
472ad383 DS |
1332 | pim->msdp.mg = pim_msdp_mg_new(mesh_group_name); |
1333 | if (!pim->msdp.mg) { | |
d62a17ae | 1334 | return PIM_MSDP_ERR_OOM; |
1335 | } | |
977d71cc | 1336 | |
d62a17ae | 1337 | return PIM_MSDP_ERR_NONE; |
977d71cc | 1338 | } |
1339 | ||
d62a17ae | 1340 | static int pim_msdp_mg_mbr_comp(const void *p1, const void *p2) |
977d71cc | 1341 | { |
d62a17ae | 1342 | const struct pim_msdp_mg_mbr *mbr1 = p1; |
1343 | const struct pim_msdp_mg_mbr *mbr2 = p2; | |
977d71cc | 1344 | |
d62a17ae | 1345 | if (ntohl(mbr1->mbr_ip.s_addr) < ntohl(mbr2->mbr_ip.s_addr)) |
1346 | return -1; | |
977d71cc | 1347 | |
d62a17ae | 1348 | if (ntohl(mbr1->mbr_ip.s_addr) > ntohl(mbr2->mbr_ip.s_addr)) |
1349 | return 1; | |
977d71cc | 1350 | |
d62a17ae | 1351 | return 0; |
977d71cc | 1352 | } |
1353 | ||
d62a17ae | 1354 | static void pim_msdp_mg_mbr_free(struct pim_msdp_mg_mbr *mbr) |
977d71cc | 1355 | { |
d62a17ae | 1356 | XFREE(MTYPE_PIM_MSDP_MG_MBR, mbr); |
977d71cc | 1357 | } |
1358 | ||
472ad383 DS |
1359 | static struct pim_msdp_mg_mbr *pim_msdp_mg_mbr_find(struct pim_instance *pim, |
1360 | struct in_addr mbr_ip) | |
977d71cc | 1361 | { |
d62a17ae | 1362 | struct pim_msdp_mg_mbr *mbr; |
1363 | struct listnode *mbr_node; | |
977d71cc | 1364 | |
472ad383 | 1365 | if (!pim->msdp.mg) { |
d62a17ae | 1366 | return NULL; |
1367 | } | |
1368 | /* we can move this to a hash but considering that number of peers in | |
1369 | * a mesh-group that seems like bit of an overkill */ | |
472ad383 | 1370 | for (ALL_LIST_ELEMENTS_RO(pim->msdp.mg->mbr_list, mbr_node, mbr)) { |
d62a17ae | 1371 | if (mbr->mbr_ip.s_addr == mbr_ip.s_addr) { |
1372 | return mbr; | |
1373 | } | |
1374 | } | |
1375 | return mbr; | |
977d71cc | 1376 | } |
1377 | ||
472ad383 DS |
1378 | enum pim_msdp_err pim_msdp_mg_mbr_add(struct pim_instance *pim, |
1379 | const char *mesh_group_name, | |
d62a17ae | 1380 | struct in_addr mbr_ip) |
977d71cc | 1381 | { |
d62a17ae | 1382 | int rc; |
1383 | struct pim_msdp_mg_mbr *mbr; | |
1384 | struct pim_msdp_mg *mg; | |
977d71cc | 1385 | |
472ad383 | 1386 | rc = pim_msdp_mg_add(pim, mesh_group_name); |
d62a17ae | 1387 | if (rc != PIM_MSDP_ERR_NONE) { |
1388 | return rc; | |
1389 | } | |
977d71cc | 1390 | |
472ad383 DS |
1391 | mg = pim->msdp.mg; |
1392 | mbr = pim_msdp_mg_mbr_find(pim, mbr_ip); | |
d62a17ae | 1393 | if (mbr) { |
1394 | return PIM_MSDP_ERR_MG_MBR_EXISTS; | |
1395 | } | |
977d71cc | 1396 | |
d62a17ae | 1397 | mbr = XCALLOC(MTYPE_PIM_MSDP_MG_MBR, sizeof(*mbr)); |
1398 | if (!mbr) { | |
1399 | zlog_err("%s: PIM XCALLOC(%zu) failure", __PRETTY_FUNCTION__, | |
1400 | sizeof(*mbr)); | |
1401 | /* if there are no references to the mg free it */ | |
472ad383 | 1402 | pim_msdp_mg_free(pim, mg); |
d62a17ae | 1403 | return PIM_MSDP_ERR_OOM; |
1404 | } | |
1405 | mbr->mbr_ip = mbr_ip; | |
1406 | listnode_add_sort(mg->mbr_list, mbr); | |
977d71cc | 1407 | |
d62a17ae | 1408 | /* if valid SIP has been configured add peer session */ |
1409 | if (mg->src_ip.s_addr != INADDR_ANY) { | |
472ad383 | 1410 | pim_msdp_peer_add(pim, mbr_ip, mg->src_ip, mesh_group_name, |
d62a17ae | 1411 | &mbr->mp); |
1412 | } | |
977d71cc | 1413 | |
d62a17ae | 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 created", | |
1418 | mg->mesh_group_name, ip_str); | |
1419 | } | |
1420 | ++mg->mbr_cnt; | |
1421 | return PIM_MSDP_ERR_NONE; | |
977d71cc | 1422 | } |
1423 | ||
d62a17ae | 1424 | static void pim_msdp_mg_mbr_do_del(struct pim_msdp_mg *mg, |
1425 | struct pim_msdp_mg_mbr *mbr) | |
977d71cc | 1426 | { |
d62a17ae | 1427 | /* Delete active peer session if any */ |
1428 | if (mbr->mp) { | |
1429 | pim_msdp_peer_do_del(mbr->mp); | |
1430 | } | |
977d71cc | 1431 | |
d62a17ae | 1432 | listnode_delete(mg->mbr_list, mbr); |
1433 | if (PIM_DEBUG_MSDP_EVENTS) { | |
1434 | char ip_str[INET_ADDRSTRLEN]; | |
1435 | pim_inet4_dump("<mbr?>", mbr->mbr_ip, ip_str, sizeof(ip_str)); | |
1436 | zlog_debug("MSDP mesh-group %s mbr %s deleted", | |
1437 | mg->mesh_group_name, ip_str); | |
1438 | } | |
1439 | pim_msdp_mg_mbr_free(mbr); | |
1440 | if (mg->mbr_cnt) { | |
1441 | --mg->mbr_cnt; | |
1442 | } | |
977d71cc | 1443 | } |
1444 | ||
472ad383 DS |
1445 | enum pim_msdp_err pim_msdp_mg_mbr_del(struct pim_instance *pim, |
1446 | const char *mesh_group_name, | |
d62a17ae | 1447 | struct in_addr mbr_ip) |
1448 | { | |
1449 | struct pim_msdp_mg_mbr *mbr; | |
472ad383 | 1450 | struct pim_msdp_mg *mg = pim->msdp.mg; |
d62a17ae | 1451 | |
1452 | if (!mg || strcmp(mg->mesh_group_name, mesh_group_name)) { | |
1453 | return PIM_MSDP_ERR_NO_MG; | |
1454 | } | |
1455 | ||
472ad383 | 1456 | mbr = pim_msdp_mg_mbr_find(pim, mbr_ip); |
d62a17ae | 1457 | if (!mbr) { |
1458 | return PIM_MSDP_ERR_NO_MG_MBR; | |
1459 | } | |
1460 | ||
1461 | pim_msdp_mg_mbr_do_del(mg, mbr); | |
1462 | /* if there are no references to the mg free it */ | |
472ad383 | 1463 | pim_msdp_mg_free(pim, mg); |
d62a17ae | 1464 | |
1465 | return PIM_MSDP_ERR_NONE; | |
1466 | } | |
1467 | ||
472ad383 | 1468 | static void pim_msdp_mg_src_do_del(struct pim_instance *pim) |
d62a17ae | 1469 | { |
1470 | struct pim_msdp_mg_mbr *mbr; | |
1471 | struct listnode *mbr_node; | |
472ad383 | 1472 | struct pim_msdp_mg *mg = pim->msdp.mg; |
d62a17ae | 1473 | |
1474 | /* SIP is being removed - tear down all active peer sessions */ | |
1475 | for (ALL_LIST_ELEMENTS_RO(mg->mbr_list, mbr_node, mbr)) { | |
1476 | if (mbr->mp) { | |
1477 | pim_msdp_peer_do_del(mbr->mp); | |
1478 | mbr->mp = NULL; | |
1479 | } | |
1480 | } | |
1481 | if (PIM_DEBUG_MSDP_EVENTS) { | |
1482 | zlog_debug("MSDP mesh-group %s src cleared", | |
1483 | mg->mesh_group_name); | |
1484 | } | |
1485 | } | |
1486 | ||
472ad383 DS |
1487 | enum pim_msdp_err pim_msdp_mg_src_del(struct pim_instance *pim, |
1488 | const char *mesh_group_name) | |
d62a17ae | 1489 | { |
472ad383 | 1490 | struct pim_msdp_mg *mg = pim->msdp.mg; |
d62a17ae | 1491 | |
1492 | if (!mg || strcmp(mg->mesh_group_name, mesh_group_name)) { | |
1493 | return PIM_MSDP_ERR_NO_MG; | |
1494 | } | |
1495 | ||
1496 | if (mg->src_ip.s_addr != INADDR_ANY) { | |
1497 | mg->src_ip.s_addr = INADDR_ANY; | |
472ad383 | 1498 | pim_msdp_mg_src_do_del(pim); |
d62a17ae | 1499 | /* if there are no references to the mg free it */ |
472ad383 | 1500 | pim_msdp_mg_free(pim, mg); |
d62a17ae | 1501 | } |
1502 | return PIM_MSDP_ERR_NONE; | |
1503 | } | |
1504 | ||
472ad383 DS |
1505 | enum pim_msdp_err pim_msdp_mg_src_add(struct pim_instance *pim, |
1506 | const char *mesh_group_name, | |
d62a17ae | 1507 | struct in_addr src_ip) |
1508 | { | |
1509 | int rc; | |
1510 | struct pim_msdp_mg_mbr *mbr; | |
1511 | struct listnode *mbr_node; | |
1512 | struct pim_msdp_mg *mg; | |
1513 | ||
1514 | if (src_ip.s_addr == INADDR_ANY) { | |
472ad383 | 1515 | pim_msdp_mg_src_del(pim, mesh_group_name); |
d62a17ae | 1516 | return PIM_MSDP_ERR_NONE; |
1517 | } | |
1518 | ||
472ad383 | 1519 | rc = pim_msdp_mg_add(pim, mesh_group_name); |
d62a17ae | 1520 | if (rc != PIM_MSDP_ERR_NONE) { |
1521 | return rc; | |
1522 | } | |
1523 | ||
472ad383 | 1524 | mg = pim->msdp.mg; |
d62a17ae | 1525 | if (mg->src_ip.s_addr != INADDR_ANY) { |
472ad383 | 1526 | pim_msdp_mg_src_do_del(pim); |
d62a17ae | 1527 | } |
1528 | mg->src_ip = src_ip; | |
977d71cc | 1529 | |
d62a17ae | 1530 | for (ALL_LIST_ELEMENTS_RO(mg->mbr_list, mbr_node, mbr)) { |
472ad383 | 1531 | pim_msdp_peer_add(pim, mbr->mbr_ip, mg->src_ip, mesh_group_name, |
d62a17ae | 1532 | &mbr->mp); |
1533 | } | |
977d71cc | 1534 | |
d62a17ae | 1535 | if (PIM_DEBUG_MSDP_EVENTS) { |
1536 | char ip_str[INET_ADDRSTRLEN]; | |
1537 | pim_inet4_dump("<src?>", mg->src_ip, ip_str, sizeof(ip_str)); | |
1538 | zlog_debug("MSDP mesh-group %s src %s set", mg->mesh_group_name, | |
1539 | ip_str); | |
1540 | } | |
1541 | return PIM_MSDP_ERR_NONE; | |
977d71cc | 1542 | } |
1543 | ||
3c72d654 | 1544 | /*********************** MSDP feature APIs *********************************/ |
c9657fdc DS |
1545 | int pim_msdp_config_write_helper(struct pim_instance *pim, struct vty *vty, |
1546 | const char *spaces) | |
d62a17ae | 1547 | { |
1548 | struct listnode *mbrnode; | |
1549 | struct pim_msdp_mg_mbr *mbr; | |
472ad383 | 1550 | struct pim_msdp_mg *mg = pim->msdp.mg; |
d62a17ae | 1551 | char mbr_str[INET_ADDRSTRLEN]; |
1552 | char src_str[INET_ADDRSTRLEN]; | |
1553 | int count = 0; | |
1554 | ||
1555 | if (!mg) { | |
1556 | return count; | |
1557 | } | |
1558 | ||
1559 | if (mg->src_ip.s_addr != INADDR_ANY) { | |
1560 | pim_inet4_dump("<src?>", mg->src_ip, src_str, sizeof(src_str)); | |
c9657fdc | 1561 | vty_out(vty, "%sip msdp mesh-group %s source %s\n", spaces, |
d62a17ae | 1562 | mg->mesh_group_name, src_str); |
1563 | ++count; | |
1564 | } | |
1565 | ||
1566 | for (ALL_LIST_ELEMENTS_RO(mg->mbr_list, mbrnode, mbr)) { | |
1567 | pim_inet4_dump("<mbr?>", mbr->mbr_ip, mbr_str, sizeof(mbr_str)); | |
c9657fdc | 1568 | vty_out(vty, "%sip msdp mesh-group %s member %s\n", spaces, |
d62a17ae | 1569 | mg->mesh_group_name, mbr_str); |
1570 | ++count; | |
1571 | } | |
1572 | return count; | |
3c72d654 | 1573 | } |
1574 | ||
472ad383 DS |
1575 | int pim_msdp_config_write(struct vty *vty) |
1576 | { | |
c9657fdc | 1577 | return pim_msdp_config_write_helper(pimg, vty, ""); |
472ad383 DS |
1578 | } |
1579 | ||
3c72d654 | 1580 | /* Enable feature including active/periodic timers etc. on the first peer |
1581 | * config. Till then MSDP should just stay quiet. */ | |
472ad383 | 1582 | static void pim_msdp_enable(struct pim_instance *pim) |
3c72d654 | 1583 | { |
472ad383 | 1584 | if (pim->msdp.flags & PIM_MSDPF_ENABLE) { |
d62a17ae | 1585 | /* feature is already enabled */ |
1586 | return; | |
1587 | } | |
472ad383 DS |
1588 | pim->msdp.flags |= PIM_MSDPF_ENABLE; |
1589 | pim->msdp.work_obuf = stream_new(PIM_MSDP_MAX_PACKET_SIZE); | |
1590 | pim_msdp_sa_adv_timer_setup(pim, true /* start */); | |
d62a17ae | 1591 | /* setup sa cache based on local sources */ |
472ad383 | 1592 | pim_msdp_sa_local_setup(pim); |
3c72d654 | 1593 | } |
1594 | ||
2a333e0f | 1595 | /* MSDP init */ |
64c86530 | 1596 | void pim_msdp_init(struct pim_instance *pim, struct thread_master *master) |
2a333e0f | 1597 | { |
472ad383 | 1598 | pim->msdp.master = master; |
9fb302f4 | 1599 | char hash_name[64]; |
3c72d654 | 1600 | |
9fb302f4 | 1601 | snprintf(hash_name, 64, "PIM %s MSDP Peer Hash", pim->vrf->name); |
2ad78035 | 1602 | pim->msdp.peer_hash = hash_create(pim_msdp_peer_hash_key_make, |
9fb302f4 | 1603 | pim_msdp_peer_hash_eq, hash_name); |
2ad78035 DS |
1604 | pim->msdp.peer_list = list_new(); |
1605 | pim->msdp.peer_list->del = (void (*)(void *))pim_msdp_peer_free; | |
1606 | pim->msdp.peer_list->cmp = (int (*)(void *, void *))pim_msdp_peer_comp; | |
3c72d654 | 1607 | |
9fb302f4 | 1608 | snprintf(hash_name, 64, "PIM %s MSDP SA Hash", pim->vrf->name); |
2ad78035 | 1609 | pim->msdp.sa_hash = hash_create(pim_msdp_sa_hash_key_make, |
9fb302f4 | 1610 | pim_msdp_sa_hash_eq, hash_name); |
2ad78035 DS |
1611 | pim->msdp.sa_list = list_new(); |
1612 | pim->msdp.sa_list->del = (void (*)(void *))pim_msdp_sa_free; | |
1613 | pim->msdp.sa_list->cmp = (int (*)(void *, void *))pim_msdp_sa_comp; | |
2a333e0f | 1614 | } |
1615 | ||
1616 | /* counterpart to MSDP init; XXX: unused currently */ | |
2ad78035 | 1617 | void pim_msdp_exit(struct pim_instance *pim) |
2a333e0f | 1618 | { |
ec2f0e53 DS |
1619 | pim_msdp_sa_adv_timer_setup(pim, false); |
1620 | ||
d62a17ae | 1621 | /* XXX: stop listener and delete all peer sessions */ |
2a333e0f | 1622 | |
2ad78035 DS |
1623 | if (pim->msdp.peer_hash) { |
1624 | hash_free(pim->msdp.peer_hash); | |
1625 | pim->msdp.peer_hash = NULL; | |
d62a17ae | 1626 | } |
2a333e0f | 1627 | |
2ad78035 | 1628 | if (pim->msdp.peer_list) { |
affe9e99 | 1629 | list_delete_and_null(&pim->msdp.peer_list); |
d62a17ae | 1630 | } |
3da8a099 DS |
1631 | |
1632 | if (pim->msdp.sa_hash) { | |
1633 | hash_free(pim->msdp.sa_hash); | |
1634 | pim->msdp.sa_hash = NULL; | |
1635 | } | |
1636 | ||
1637 | if (pim->msdp.sa_list) { | |
affe9e99 | 1638 | list_delete_and_null(&pim->msdp.sa_list); |
3da8a099 | 1639 | } |
11128587 | 1640 | } |