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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" |
34 | #include "pim_cmd.h" | |
35 | #include "pim_memory.h" | |
7176984f | 36 | #include "pim_iface.h" |
3c72d654 | 37 | #include "pim_rp.h" |
2a333e0f | 38 | #include "pim_str.h" |
39 | #include "pim_time.h" | |
1bf16443 | 40 | #include "pim_upstream.h" |
472ad383 | 41 | #include "pim_oil.h" |
11128587 | 42 | |
2a333e0f | 43 | #include "pim_msdp.h" |
44 | #include "pim_msdp_packet.h" | |
45 | #include "pim_msdp_socket.h" | |
46 | ||
2ad78035 | 47 | // struct pim_msdp pim_msdp, *msdp = &pim_msdp; |
2a333e0f | 48 | |
49 | static void pim_msdp_peer_listen(struct pim_msdp_peer *mp); | |
50 | static void pim_msdp_peer_cr_timer_setup(struct pim_msdp_peer *mp, bool start); | |
51 | static void pim_msdp_peer_ka_timer_setup(struct pim_msdp_peer *mp, bool start); | |
d62a17ae | 52 | static void pim_msdp_peer_hold_timer_setup(struct pim_msdp_peer *mp, |
53 | bool start); | |
2a333e0f | 54 | static void pim_msdp_peer_free(struct pim_msdp_peer *mp); |
472ad383 DS |
55 | static void pim_msdp_enable(struct pim_instance *pim); |
56 | static void pim_msdp_sa_adv_timer_setup(struct pim_instance *pim, bool start); | |
d62a17ae | 57 | static void pim_msdp_sa_deref(struct pim_msdp_sa *sa, |
58 | enum pim_msdp_sa_flags flags); | |
977d71cc | 59 | static int pim_msdp_mg_mbr_comp(const void *p1, const void *p2); |
60 | static void pim_msdp_mg_mbr_free(struct pim_msdp_mg_mbr *mbr); | |
2a333e0f | 61 | |
3c72d654 | 62 | /************************ SA cache management ******************************/ |
d62a17ae | 63 | static void pim_msdp_sa_timer_expiry_log(struct pim_msdp_sa *sa, |
64 | const char *timer_str) | |
3c72d654 | 65 | { |
d62a17ae | 66 | zlog_debug("MSDP SA %s %s timer expired", sa->sg_str, timer_str); |
3c72d654 | 67 | } |
68 | ||
69 | /* RFC-3618:Sec-5.1 - global active source advertisement timer */ | |
d62a17ae | 70 | static int pim_msdp_sa_adv_timer_cb(struct thread *t) |
3c72d654 | 71 | { |
472ad383 DS |
72 | struct pim_instance *pim = THREAD_ARG(t); |
73 | ||
d62a17ae | 74 | if (PIM_DEBUG_MSDP_EVENTS) { |
0437e105 | 75 | zlog_debug("MSDP SA advertisement timer expired"); |
d62a17ae | 76 | } |
3c72d654 | 77 | |
472ad383 DS |
78 | pim_msdp_sa_adv_timer_setup(pim, true /* start */); |
79 | pim_msdp_pkt_sa_tx(pim); | |
d62a17ae | 80 | return 0; |
3c72d654 | 81 | } |
472ad383 | 82 | static void pim_msdp_sa_adv_timer_setup(struct pim_instance *pim, bool start) |
3c72d654 | 83 | { |
472ad383 | 84 | THREAD_OFF(pim->msdp.sa_adv_timer); |
d62a17ae | 85 | if (start) { |
472ad383 DS |
86 | thread_add_timer(pim->msdp.master, pim_msdp_sa_adv_timer_cb, |
87 | pim, PIM_MSDP_SA_ADVERTISMENT_TIME, | |
88 | &pim->msdp.sa_adv_timer); | |
d62a17ae | 89 | } |
3c72d654 | 90 | } |
91 | ||
92 | /* RFC-3618:Sec-5.3 - SA cache state timer */ | |
d62a17ae | 93 | static int pim_msdp_sa_state_timer_cb(struct thread *t) |
3c72d654 | 94 | { |
d62a17ae | 95 | struct pim_msdp_sa *sa; |
3c72d654 | 96 | |
d62a17ae | 97 | sa = THREAD_ARG(t); |
3c72d654 | 98 | |
d62a17ae | 99 | if (PIM_DEBUG_MSDP_EVENTS) { |
100 | pim_msdp_sa_timer_expiry_log(sa, "state"); | |
101 | } | |
3c72d654 | 102 | |
d62a17ae | 103 | pim_msdp_sa_deref(sa, PIM_MSDP_SAF_PEER); |
104 | return 0; | |
3c72d654 | 105 | } |
d62a17ae | 106 | static void pim_msdp_sa_state_timer_setup(struct pim_msdp_sa *sa, bool start) |
3c72d654 | 107 | { |
d62a17ae | 108 | THREAD_OFF(sa->sa_state_timer); |
109 | if (start) { | |
472ad383 DS |
110 | thread_add_timer(sa->pim->msdp.master, |
111 | pim_msdp_sa_state_timer_cb, sa, | |
112 | PIM_MSDP_SA_HOLD_TIME, &sa->sa_state_timer); | |
d62a17ae | 113 | } |
3c72d654 | 114 | } |
115 | ||
d62a17ae | 116 | static void pim_msdp_sa_upstream_del(struct pim_msdp_sa *sa) |
7667c556 | 117 | { |
d62a17ae | 118 | struct pim_upstream *up = sa->up; |
119 | if (!up) { | |
120 | return; | |
121 | } | |
7667c556 | 122 | |
d62a17ae | 123 | sa->up = NULL; |
124 | if (PIM_UPSTREAM_FLAG_TEST_SRC_MSDP(up->flags)) { | |
125 | PIM_UPSTREAM_FLAG_UNSET_SRC_MSDP(up->flags); | |
126 | sa->flags |= PIM_MSDP_SAF_UP_DEL_IN_PROG; | |
15569c58 | 127 | up = pim_upstream_del(sa->pim, up, __func__); |
41a115e4 AK |
128 | /* re-eval joinDesired; clearing peer-msdp-sa flag can |
129 | * cause JD to change | |
130 | */ | |
131 | if (up) | |
132 | pim_upstream_update_join_desired(sa->pim, up); | |
d62a17ae | 133 | sa->flags &= ~PIM_MSDP_SAF_UP_DEL_IN_PROG; |
134 | } | |
7667c556 | 135 | |
d62a17ae | 136 | if (PIM_DEBUG_MSDP_EVENTS) { |
137 | zlog_debug("MSDP SA %s de-referenced SPT", sa->sg_str); | |
138 | } | |
7667c556 | 139 | } |
140 | ||
d62a17ae | 141 | static bool pim_msdp_sa_upstream_add_ok(struct pim_msdp_sa *sa, |
142 | struct pim_upstream *xg_up) | |
7667c556 | 143 | { |
d62a17ae | 144 | if (!(sa->flags & PIM_MSDP_SAF_PEER)) { |
145 | /* SA should have been rxed from a peer */ | |
146 | return false; | |
147 | } | |
148 | /* check if we are RP */ | |
472ad383 | 149 | if (!I_am_RP(sa->pim, sa->sg.grp)) { |
d62a17ae | 150 | return false; |
151 | } | |
7667c556 | 152 | |
d62a17ae | 153 | /* check if we have a (*, G) with a non-empty immediate OIL */ |
154 | if (!xg_up) { | |
6fff2cc6 | 155 | pim_sgaddr sg; |
7667c556 | 156 | |
d62a17ae | 157 | memset(&sg, 0, sizeof(sg)); |
158 | sg.grp = sa->sg.grp; | |
7667c556 | 159 | |
472ad383 | 160 | xg_up = pim_upstream_find(sa->pim, &sg); |
d62a17ae | 161 | } |
162 | if (!xg_up || (xg_up->join_state != PIM_UPSTREAM_JOINED)) { | |
163 | /* join desired will be true for such (*, G) entries so we will | |
164 | * just look at join_state and let the PIM state machine do the | |
165 | * rest of | |
166 | * the magic */ | |
167 | return false; | |
168 | } | |
7667c556 | 169 | |
d62a17ae | 170 | return true; |
7667c556 | 171 | } |
172 | ||
173 | /* Upstream add evaluation needs to happen everytime - | |
174 | * 1. Peer reference is added or removed. | |
1bf16443 | 175 | * 2. The RP for a group changes. |
176 | * 3. joinDesired for the associated (*, G) changes | |
177 | * 4. associated (*, G) is removed - this seems like a bit redundant | |
7667c556 | 178 | * (considering #4); but just in case an entry gets nuked without |
179 | * upstream state transition | |
180 | * */ | |
d62a17ae | 181 | static void pim_msdp_sa_upstream_update(struct pim_msdp_sa *sa, |
182 | struct pim_upstream *xg_up, | |
183 | const char *ctx) | |
184 | { | |
185 | struct pim_upstream *up; | |
186 | ||
187 | if (!pim_msdp_sa_upstream_add_ok(sa, xg_up)) { | |
188 | pim_msdp_sa_upstream_del(sa); | |
189 | return; | |
190 | } | |
191 | ||
192 | if (sa->up) { | |
193 | /* nothing to do */ | |
194 | return; | |
195 | } | |
196 | ||
472ad383 | 197 | up = pim_upstream_find(sa->pim, &sa->sg); |
d62a17ae | 198 | if (up && (PIM_UPSTREAM_FLAG_TEST_SRC_MSDP(up->flags))) { |
199 | /* somehow we lost track of the upstream ptr? best log it */ | |
200 | sa->up = up; | |
201 | if (PIM_DEBUG_MSDP_EVENTS) { | |
202 | zlog_debug("MSDP SA %s SPT reference missing", | |
203 | sa->sg_str); | |
204 | } | |
205 | return; | |
206 | } | |
207 | ||
208 | /* RFC3618: "RP triggers a (S, G) join event towards the data source | |
209 | * as if a JP message was rxed addressed to the RP itself." */ | |
2002dcdb | 210 | up = pim_upstream_add(sa->pim, &sa->sg, NULL /* iif */, |
15569c58 | 211 | PIM_UPSTREAM_FLAG_MASK_SRC_MSDP, __func__, NULL); |
d62a17ae | 212 | |
213 | sa->up = up; | |
214 | if (up) { | |
215 | /* update inherited oil */ | |
472ad383 | 216 | pim_upstream_inherited_olist(sa->pim, up); |
d62a17ae | 217 | /* should we also start the kat in parallel? we will need it |
218 | * when the | |
219 | * SA ages out */ | |
220 | if (PIM_DEBUG_MSDP_EVENTS) { | |
221 | zlog_debug("MSDP SA %s referenced SPT", sa->sg_str); | |
222 | } | |
223 | } else { | |
224 | if (PIM_DEBUG_MSDP_EVENTS) { | |
225 | zlog_debug("MSDP SA %s SPT reference failed", | |
226 | sa->sg_str); | |
227 | } | |
228 | } | |
7667c556 | 229 | } |
230 | ||
3c72d654 | 231 | /* release all mem associated with a sa */ |
d62a17ae | 232 | static void pim_msdp_sa_free(struct pim_msdp_sa *sa) |
3c72d654 | 233 | { |
ec2f0e53 DS |
234 | pim_msdp_sa_state_timer_setup(sa, false); |
235 | ||
d62a17ae | 236 | XFREE(MTYPE_PIM_MSDP_SA, sa); |
3c72d654 | 237 | } |
238 | ||
472ad383 | 239 | static struct pim_msdp_sa *pim_msdp_sa_new(struct pim_instance *pim, |
6fff2cc6 | 240 | pim_sgaddr *sg, struct in_addr rp) |
3c72d654 | 241 | { |
d62a17ae | 242 | struct pim_msdp_sa *sa; |
3c72d654 | 243 | |
d62a17ae | 244 | sa = XCALLOC(MTYPE_PIM_MSDP_SA, sizeof(*sa)); |
3c72d654 | 245 | |
472ad383 | 246 | sa->pim = pim; |
d62a17ae | 247 | sa->sg = *sg; |
9bace5c2 | 248 | snprintfrr(sa->sg_str, sizeof(sa->sg_str), "%pSG", sg); |
d62a17ae | 249 | sa->rp = rp; |
250 | sa->uptime = pim_time_monotonic_sec(); | |
3c72d654 | 251 | |
d62a17ae | 252 | /* insert into misc tables for easy access */ |
472ad383 | 253 | sa = hash_get(pim->msdp.sa_hash, sa, hash_alloc_intern); |
472ad383 | 254 | listnode_add_sort(pim->msdp.sa_list, sa); |
3c72d654 | 255 | |
d62a17ae | 256 | if (PIM_DEBUG_MSDP_EVENTS) { |
257 | zlog_debug("MSDP SA %s created", sa->sg_str); | |
258 | } | |
3c72d654 | 259 | |
d62a17ae | 260 | return sa; |
3c72d654 | 261 | } |
262 | ||
472ad383 | 263 | static struct pim_msdp_sa *pim_msdp_sa_find(struct pim_instance *pim, |
6fff2cc6 | 264 | pim_sgaddr *sg) |
3c72d654 | 265 | { |
d62a17ae | 266 | struct pim_msdp_sa lookup; |
3c72d654 | 267 | |
d62a17ae | 268 | lookup.sg = *sg; |
472ad383 | 269 | return hash_lookup(pim->msdp.sa_hash, &lookup); |
3c72d654 | 270 | } |
271 | ||
472ad383 | 272 | static struct pim_msdp_sa *pim_msdp_sa_add(struct pim_instance *pim, |
6fff2cc6 | 273 | pim_sgaddr *sg, struct in_addr rp) |
3c72d654 | 274 | { |
d62a17ae | 275 | struct pim_msdp_sa *sa; |
3c72d654 | 276 | |
472ad383 | 277 | sa = pim_msdp_sa_find(pim, sg); |
d62a17ae | 278 | if (sa) { |
279 | return sa; | |
280 | } | |
3c72d654 | 281 | |
472ad383 | 282 | return pim_msdp_sa_new(pim, sg, rp); |
3c72d654 | 283 | } |
284 | ||
d62a17ae | 285 | static void pim_msdp_sa_del(struct pim_msdp_sa *sa) |
3c72d654 | 286 | { |
d62a17ae | 287 | /* this is somewhat redundant - still want to be careful not to leave |
288 | * stale upstream references */ | |
289 | pim_msdp_sa_upstream_del(sa); | |
7667c556 | 290 | |
d62a17ae | 291 | /* stop timers */ |
292 | pim_msdp_sa_state_timer_setup(sa, false /* start */); | |
3c72d654 | 293 | |
d62a17ae | 294 | /* remove the entry from various tables */ |
472ad383 DS |
295 | listnode_delete(sa->pim->msdp.sa_list, sa); |
296 | hash_release(sa->pim->msdp.sa_hash, sa); | |
3c72d654 | 297 | |
d62a17ae | 298 | if (PIM_DEBUG_MSDP_EVENTS) { |
299 | zlog_debug("MSDP SA %s deleted", sa->sg_str); | |
300 | } | |
3c72d654 | 301 | |
d62a17ae | 302 | /* free up any associated memory */ |
303 | pim_msdp_sa_free(sa); | |
3c72d654 | 304 | } |
305 | ||
d62a17ae | 306 | static void pim_msdp_sa_peer_ip_set(struct pim_msdp_sa *sa, |
307 | struct pim_msdp_peer *mp, struct in_addr rp) | |
15ad0c71 | 308 | { |
d62a17ae | 309 | struct pim_msdp_peer *old_mp; |
15ad0c71 | 310 | |
d62a17ae | 311 | /* optimize the "no change" case as it will happen |
312 | * frequently/periodically */ | |
313 | if (mp && (sa->peer.s_addr == mp->peer.s_addr)) { | |
314 | return; | |
315 | } | |
15ad0c71 | 316 | |
d62a17ae | 317 | /* any time the peer ip changes also update the rp address */ |
318 | if (PIM_INADDR_ISNOT_ANY(sa->peer)) { | |
472ad383 | 319 | old_mp = pim_msdp_peer_find(sa->pim, sa->peer); |
d62a17ae | 320 | if (old_mp && old_mp->sa_cnt) { |
321 | --old_mp->sa_cnt; | |
322 | } | |
323 | } | |
15ad0c71 | 324 | |
d62a17ae | 325 | if (mp) { |
326 | ++mp->sa_cnt; | |
327 | sa->peer = mp->peer; | |
328 | } else { | |
329 | sa->peer.s_addr = PIM_NET_INADDR_ANY; | |
330 | } | |
331 | sa->rp = rp; | |
15ad0c71 | 332 | } |
333 | ||
3c72d654 | 334 | /* When a local active-source is removed there is no way to withdraw the |
335 | * source from peers. We will simply remove it from the SA cache so it will | |
336 | * not be sent in supsequent SA updates. Peers will consequently timeout the | |
337 | * SA. | |
338 | * Similarly a "peer-added" SA is never explicitly deleted. It is simply | |
d62a17ae | 339 | * aged out overtime if not seen in the SA updates from the peers. |
3c72d654 | 340 | * XXX: should we provide a knob to drop entries learnt from a peer when the |
341 | * peer goes down? */ | |
d62a17ae | 342 | static void pim_msdp_sa_deref(struct pim_msdp_sa *sa, |
343 | enum pim_msdp_sa_flags flags) | |
344 | { | |
345 | bool update_up = false; | |
346 | ||
347 | if ((sa->flags & PIM_MSDP_SAF_LOCAL)) { | |
348 | if (flags & PIM_MSDP_SAF_LOCAL) { | |
349 | if (PIM_DEBUG_MSDP_EVENTS) { | |
350 | zlog_debug("MSDP SA %s local reference removed", | |
351 | sa->sg_str); | |
352 | } | |
472ad383 DS |
353 | if (sa->pim->msdp.local_cnt) |
354 | --sa->pim->msdp.local_cnt; | |
d62a17ae | 355 | } |
356 | } | |
357 | ||
358 | if ((sa->flags & PIM_MSDP_SAF_PEER)) { | |
359 | if (flags & PIM_MSDP_SAF_PEER) { | |
360 | struct in_addr rp; | |
361 | ||
362 | if (PIM_DEBUG_MSDP_EVENTS) { | |
363 | zlog_debug("MSDP SA %s peer reference removed", | |
364 | sa->sg_str); | |
365 | } | |
366 | pim_msdp_sa_state_timer_setup(sa, false /* start */); | |
367 | rp.s_addr = INADDR_ANY; | |
368 | pim_msdp_sa_peer_ip_set(sa, NULL /* mp */, rp); | |
369 | /* if peer ref was removed we need to remove the msdp | |
370 | * reference on the | |
371 | * msdp entry */ | |
372 | update_up = true; | |
373 | } | |
374 | } | |
375 | ||
376 | sa->flags &= ~flags; | |
377 | if (update_up) { | |
378 | pim_msdp_sa_upstream_update(sa, NULL /* xg_up */, "sa-deref"); | |
379 | } | |
380 | ||
381 | if (!(sa->flags & PIM_MSDP_SAF_REF)) { | |
382 | pim_msdp_sa_del(sa); | |
383 | } | |
384 | } | |
385 | ||
472ad383 | 386 | void pim_msdp_sa_ref(struct pim_instance *pim, struct pim_msdp_peer *mp, |
6fff2cc6 | 387 | pim_sgaddr *sg, struct in_addr rp) |
d62a17ae | 388 | { |
389 | struct pim_msdp_sa *sa; | |
390 | ||
472ad383 | 391 | sa = pim_msdp_sa_add(pim, sg, rp); |
d62a17ae | 392 | if (!sa) { |
393 | return; | |
394 | } | |
395 | ||
396 | /* reference it */ | |
397 | if (mp) { | |
398 | if (!(sa->flags & PIM_MSDP_SAF_PEER)) { | |
399 | sa->flags |= PIM_MSDP_SAF_PEER; | |
400 | if (PIM_DEBUG_MSDP_EVENTS) { | |
401 | zlog_debug("MSDP SA %s added by peer", | |
402 | sa->sg_str); | |
403 | } | |
404 | } | |
405 | pim_msdp_sa_peer_ip_set(sa, mp, rp); | |
406 | /* start/re-start the state timer to prevent cache expiry */ | |
407 | pim_msdp_sa_state_timer_setup(sa, true /* start */); | |
408 | /* We re-evaluate SA "SPT-trigger" everytime we hear abt it from | |
409 | * a | |
410 | * peer. XXX: If this becomes too much of a periodic overhead we | |
411 | * can make it event based */ | |
412 | pim_msdp_sa_upstream_update(sa, NULL /* xg_up */, "peer-ref"); | |
413 | } else { | |
414 | if (!(sa->flags & PIM_MSDP_SAF_LOCAL)) { | |
415 | sa->flags |= PIM_MSDP_SAF_LOCAL; | |
472ad383 | 416 | ++sa->pim->msdp.local_cnt; |
d62a17ae | 417 | if (PIM_DEBUG_MSDP_EVENTS) { |
418 | zlog_debug("MSDP SA %s added locally", | |
419 | sa->sg_str); | |
420 | } | |
421 | /* send an immediate SA update to peers */ | |
9fbd9fc4 | 422 | sa->rp = pim->msdp.originator_id; |
d62a17ae | 423 | pim_msdp_pkt_sa_tx_one(sa); |
424 | } | |
425 | sa->flags &= ~PIM_MSDP_SAF_STALE; | |
426 | } | |
3c72d654 | 427 | } |
428 | ||
1bf16443 | 429 | /* The following criteria must be met to originate an SA from the MSDP |
430 | * speaker - | |
431 | * 1. KAT must be running i.e. source is active. | |
432 | * 2. We must be RP for the group. | |
433 | * 3. Source must be registrable to the RP (this is where the RFC is vague | |
434 | * and especially ambiguous in CLOS networks; with anycast RP all sources | |
435 | * are potentially registrable to all RPs in the domain). We assume #3 is | |
436 | * satisfied if - | |
437 | * a. We are also the FHR-DR for the source (OR) | |
438 | * b. We rxed a pim register (null or data encapsulated) within the last | |
439 | * (3 * (1.5 * register_suppression_timer))). | |
440 | */ | |
d62a17ae | 441 | static bool pim_msdp_sa_local_add_ok(struct pim_upstream *up) |
3c72d654 | 442 | { |
472ad383 DS |
443 | struct pim_instance *pim = up->channel_oil->pim; |
444 | ||
445 | if (!(pim->msdp.flags & PIM_MSDPF_ENABLE)) { | |
d62a17ae | 446 | return false; |
447 | } | |
3c72d654 | 448 | |
ec836533 | 449 | if (!pim_upstream_is_kat_running(up)) |
d62a17ae | 450 | /* stream is not active */ |
451 | return false; | |
1bf16443 | 452 | |
472ad383 | 453 | if (!I_am_RP(pim, up->sg.grp)) { |
d62a17ae | 454 | /* we are not RP for the group */ |
455 | return false; | |
456 | } | |
1bf16443 | 457 | |
d62a17ae | 458 | /* we are the FHR-DR for this stream or we are RP and have seen |
459 | * registers | |
460 | * from a FHR for this source */ | |
461 | if (PIM_UPSTREAM_FLAG_TEST_FHR(up->flags) || up->t_msdp_reg_timer) { | |
462 | return true; | |
463 | } | |
1bf16443 | 464 | |
d62a17ae | 465 | return false; |
1bf16443 | 466 | } |
467 | ||
6fff2cc6 | 468 | static void pim_msdp_sa_local_add(struct pim_instance *pim, pim_sgaddr *sg) |
1bf16443 | 469 | { |
d62a17ae | 470 | struct in_addr rp; |
975a328e | 471 | rp.s_addr = INADDR_ANY; |
472ad383 | 472 | pim_msdp_sa_ref(pim, NULL /* mp */, sg, rp); |
3c72d654 | 473 | } |
474 | ||
6fff2cc6 | 475 | void pim_msdp_sa_local_del(struct pim_instance *pim, pim_sgaddr *sg) |
3c72d654 | 476 | { |
d62a17ae | 477 | struct pim_msdp_sa *sa; |
3c72d654 | 478 | |
472ad383 | 479 | sa = pim_msdp_sa_find(pim, sg); |
d62a17ae | 480 | if (sa) { |
481 | pim_msdp_sa_deref(sa, PIM_MSDP_SAF_LOCAL); | |
482 | } | |
3c72d654 | 483 | } |
484 | ||
36e466fe | 485 | /* we need to be very cautious with this API as SA del too can trigger an |
486 | * upstream del and we will get stuck in a simple loop */ | |
472ad383 | 487 | static void pim_msdp_sa_local_del_on_up_del(struct pim_instance *pim, |
6fff2cc6 | 488 | pim_sgaddr *sg) |
d62a17ae | 489 | { |
490 | struct pim_msdp_sa *sa; | |
491 | ||
472ad383 | 492 | sa = pim_msdp_sa_find(pim, sg); |
d62a17ae | 493 | if (sa) { |
494 | if (PIM_DEBUG_MSDP_INTERNAL) { | |
495 | zlog_debug("MSDP local sa %s del on up del", | |
496 | sa->sg_str); | |
497 | } | |
498 | ||
499 | /* if there is no local reference escape */ | |
500 | if (!(sa->flags & PIM_MSDP_SAF_LOCAL)) { | |
501 | if (PIM_DEBUG_MSDP_INTERNAL) { | |
502 | zlog_debug("MSDP local sa %s del; no local ref", | |
503 | sa->sg_str); | |
504 | } | |
505 | return; | |
506 | } | |
507 | ||
508 | if (sa->flags & PIM_MSDP_SAF_UP_DEL_IN_PROG) { | |
509 | /* MSDP is the one that triggered the upstream del. if | |
510 | * this happens | |
511 | * we most certainly have a bug in the PIM upstream | |
512 | * state machine. We | |
513 | * will not have a local reference unless the KAT is | |
514 | * running. And if the | |
515 | * KAT is running there MUST be an additional | |
516 | * source-stream reference to | |
517 | * the flow. Accounting for such cases requires lot of | |
518 | * changes; perhaps | |
519 | * address this in the next release? - XXX */ | |
af4c2728 | 520 | flog_err( |
1c50c1c0 | 521 | EC_LIB_DEVELOPMENT, |
d62a17ae | 522 | "MSDP sa %s SPT teardown is causing the local entry to be removed", |
523 | sa->sg_str); | |
524 | return; | |
525 | } | |
526 | ||
527 | /* we are dropping the sa on upstream del we should not have an | |
528 | * upstream reference */ | |
529 | if (sa->up) { | |
530 | if (PIM_DEBUG_MSDP_INTERNAL) { | |
531 | zlog_debug("MSDP local sa %s del; up non-NULL", | |
532 | sa->sg_str); | |
533 | } | |
534 | sa->up = NULL; | |
535 | } | |
536 | pim_msdp_sa_deref(sa, PIM_MSDP_SAF_LOCAL); | |
537 | } | |
36e466fe | 538 | } |
539 | ||
1bf16443 | 540 | /* Local SA qualification needs to be re-evaluated when - |
541 | * 1. KAT is started or stopped | |
542 | * 2. on RP changes | |
543 | * 3. Whenever FHR status changes for a (S,G) - XXX - currently there | |
544 | * is no clear path to transition an entry out of "MASK_FHR" need | |
545 | * to discuss this with Donald. May result in some strangeness if the | |
546 | * FHR is also the RP. | |
547 | * 4. When msdp_reg timer is started or stopped | |
548 | */ | |
d62a17ae | 549 | void pim_msdp_sa_local_update(struct pim_upstream *up) |
1bf16443 | 550 | { |
472ad383 DS |
551 | struct pim_instance *pim = up->channel_oil->pim; |
552 | ||
d62a17ae | 553 | if (pim_msdp_sa_local_add_ok(up)) { |
472ad383 | 554 | pim_msdp_sa_local_add(pim, &up->sg); |
d62a17ae | 555 | } else { |
472ad383 | 556 | pim_msdp_sa_local_del(pim, &up->sg); |
d62a17ae | 557 | } |
1bf16443 | 558 | } |
559 | ||
472ad383 | 560 | static void pim_msdp_sa_local_setup(struct pim_instance *pim) |
3c72d654 | 561 | { |
d62a17ae | 562 | struct pim_upstream *up; |
3c72d654 | 563 | |
dd3364cb | 564 | frr_each (rb_pim_upstream, &pim->upstream_head, up) |
d62a17ae | 565 | pim_msdp_sa_local_update(up); |
3c72d654 | 566 | } |
567 | ||
7667c556 | 568 | /* whenever the RP changes we need to re-evaluate the "local" SA-cache */ |
569 | /* XXX: needs to be tested */ | |
472ad383 | 570 | void pim_msdp_i_am_rp_changed(struct pim_instance *pim) |
d62a17ae | 571 | { |
572 | struct listnode *sanode; | |
573 | struct listnode *nextnode; | |
574 | struct pim_msdp_sa *sa; | |
575 | ||
472ad383 | 576 | if (!(pim->msdp.flags & PIM_MSDPF_ENABLE)) { |
d62a17ae | 577 | /* if the feature is not enabled do nothing */ |
578 | return; | |
579 | } | |
580 | ||
581 | if (PIM_DEBUG_MSDP_INTERNAL) { | |
582 | zlog_debug("MSDP i_am_rp changed"); | |
583 | } | |
584 | ||
585 | /* mark all local entries as stale */ | |
472ad383 | 586 | for (ALL_LIST_ELEMENTS_RO(pim->msdp.sa_list, sanode, sa)) { |
d62a17ae | 587 | if (sa->flags & PIM_MSDP_SAF_LOCAL) { |
588 | sa->flags |= PIM_MSDP_SAF_STALE; | |
589 | } | |
590 | } | |
591 | ||
592 | /* re-setup local SA entries */ | |
472ad383 | 593 | pim_msdp_sa_local_setup(pim); |
d62a17ae | 594 | |
472ad383 | 595 | for (ALL_LIST_ELEMENTS(pim->msdp.sa_list, sanode, nextnode, sa)) { |
d62a17ae | 596 | /* purge stale SA entries */ |
597 | if (sa->flags & PIM_MSDP_SAF_STALE) { | |
598 | /* clear the stale flag; the entry may be kept even | |
599 | * after | |
600 | * "local-deref" */ | |
601 | sa->flags &= ~PIM_MSDP_SAF_STALE; | |
602 | /* sa_deref can end up freeing the sa; so don't access | |
603 | * contents after */ | |
604 | pim_msdp_sa_deref(sa, PIM_MSDP_SAF_LOCAL); | |
605 | } else { | |
606 | /* if the souce is still active check if we can | |
607 | * influence SPT */ | |
608 | pim_msdp_sa_upstream_update(sa, NULL /* xg_up */, | |
609 | "rp-change"); | |
610 | } | |
611 | } | |
7667c556 | 612 | } |
613 | ||
614 | /* We track the join state of (*, G) entries. If G has sources in the SA-cache | |
615 | * we need to setup or teardown SPT when the JoinDesired status changes for | |
616 | * (*, G) */ | |
1eca8576 DS |
617 | void pim_msdp_up_join_state_changed(struct pim_instance *pim, |
618 | struct pim_upstream *xg_up) | |
d62a17ae | 619 | { |
620 | struct listnode *sanode; | |
621 | struct pim_msdp_sa *sa; | |
622 | ||
623 | if (PIM_DEBUG_MSDP_INTERNAL) { | |
624 | zlog_debug("MSDP join state changed for %s", xg_up->sg_str); | |
625 | } | |
626 | ||
627 | /* If this is not really an XG entry just move on */ | |
2a27f13b | 628 | if (!pim_addr_is_any(xg_up->sg.src) || pim_addr_is_any(xg_up->sg.grp)) { |
d62a17ae | 629 | return; |
630 | } | |
631 | ||
632 | /* XXX: Need to maintain SAs per-group to avoid all this unnecessary | |
633 | * walking */ | |
472ad383 | 634 | for (ALL_LIST_ELEMENTS_RO(pim->msdp.sa_list, sanode, sa)) { |
d62a17ae | 635 | if (sa->sg.grp.s_addr != xg_up->sg.grp.s_addr) { |
636 | continue; | |
637 | } | |
638 | pim_msdp_sa_upstream_update(sa, xg_up, "up-jp-change"); | |
639 | } | |
640 | } | |
641 | ||
6fff2cc6 | 642 | static void pim_msdp_up_xg_del(struct pim_instance *pim, pim_sgaddr *sg) |
d62a17ae | 643 | { |
644 | struct listnode *sanode; | |
645 | struct pim_msdp_sa *sa; | |
646 | ||
647 | if (PIM_DEBUG_MSDP_INTERNAL) { | |
98a81d2b | 648 | zlog_debug("MSDP %pSG del", sg); |
d62a17ae | 649 | } |
650 | ||
651 | /* If this is not really an XG entry just move on */ | |
2a27f13b | 652 | if (!pim_addr_is_any(sg->src) || pim_addr_is_any(sg->grp)) { |
d62a17ae | 653 | return; |
654 | } | |
655 | ||
656 | /* XXX: Need to maintain SAs per-group to avoid all this unnecessary | |
657 | * walking */ | |
472ad383 | 658 | for (ALL_LIST_ELEMENTS_RO(pim->msdp.sa_list, sanode, sa)) { |
d62a17ae | 659 | if (sa->sg.grp.s_addr != sg->grp.s_addr) { |
660 | continue; | |
661 | } | |
662 | pim_msdp_sa_upstream_update(sa, NULL /* xg */, "up-jp-change"); | |
663 | } | |
664 | } | |
665 | ||
6fff2cc6 | 666 | void pim_msdp_up_del(struct pim_instance *pim, pim_sgaddr *sg) |
d62a17ae | 667 | { |
668 | if (PIM_DEBUG_MSDP_INTERNAL) { | |
98a81d2b | 669 | zlog_debug("MSDP up %pSG del", sg); |
d62a17ae | 670 | } |
2a27f13b | 671 | if (pim_addr_is_any(sg->src)) { |
472ad383 | 672 | pim_msdp_up_xg_del(pim, sg); |
d62a17ae | 673 | } else { |
472ad383 | 674 | pim_msdp_sa_local_del_on_up_del(pim, sg); |
d62a17ae | 675 | } |
36e466fe | 676 | } |
677 | ||
3c72d654 | 678 | /* sa hash and peer list helpers */ |
d8b87afe | 679 | static unsigned int pim_msdp_sa_hash_key_make(const void *p) |
3c72d654 | 680 | { |
d8b87afe | 681 | const struct pim_msdp_sa *sa = p; |
3c72d654 | 682 | |
d62a17ae | 683 | return (jhash_2words(sa->sg.src.s_addr, sa->sg.grp.s_addr, 0)); |
3c72d654 | 684 | } |
685 | ||
74df8d6d | 686 | static bool pim_msdp_sa_hash_eq(const void *p1, const void *p2) |
3c72d654 | 687 | { |
d62a17ae | 688 | const struct pim_msdp_sa *sa1 = p1; |
689 | const struct pim_msdp_sa *sa2 = p2; | |
3c72d654 | 690 | |
d62a17ae | 691 | return ((sa1->sg.src.s_addr == sa2->sg.src.s_addr) |
692 | && (sa1->sg.grp.s_addr == sa2->sg.grp.s_addr)); | |
3c72d654 | 693 | } |
694 | ||
d62a17ae | 695 | static int pim_msdp_sa_comp(const void *p1, const void *p2) |
3c72d654 | 696 | { |
d62a17ae | 697 | const struct pim_msdp_sa *sa1 = p1; |
698 | const struct pim_msdp_sa *sa2 = p2; | |
3c72d654 | 699 | |
d62a17ae | 700 | if (ntohl(sa1->sg.grp.s_addr) < ntohl(sa2->sg.grp.s_addr)) |
701 | return -1; | |
3c72d654 | 702 | |
d62a17ae | 703 | if (ntohl(sa1->sg.grp.s_addr) > ntohl(sa2->sg.grp.s_addr)) |
704 | return 1; | |
3c72d654 | 705 | |
d62a17ae | 706 | if (ntohl(sa1->sg.src.s_addr) < ntohl(sa2->sg.src.s_addr)) |
707 | return -1; | |
3c72d654 | 708 | |
d62a17ae | 709 | if (ntohl(sa1->sg.src.s_addr) > ntohl(sa2->sg.src.s_addr)) |
710 | return 1; | |
3c72d654 | 711 | |
d62a17ae | 712 | return 0; |
3c72d654 | 713 | } |
714 | ||
715 | /* RFC-3618:Sec-10.1.3 - Peer-RPF forwarding */ | |
716 | /* XXX: this can use a bit of refining and extensions */ | |
d62a17ae | 717 | bool pim_msdp_peer_rpf_check(struct pim_msdp_peer *mp, struct in_addr rp) |
3c72d654 | 718 | { |
b0a13ffb | 719 | struct pim_nexthop nexthop = {0}; |
9fbd9fc4 | 720 | |
d62a17ae | 721 | if (mp->peer.s_addr == rp.s_addr) { |
722 | return true; | |
723 | } | |
3c72d654 | 724 | |
9fbd9fc4 AMR |
725 | /* check if the MSDP peer is the nexthop for the RP */ |
726 | if (pim_nexthop_lookup(mp->pim, &nexthop, rp, 0) | |
727 | && nexthop.mrib_nexthop_addr.u.prefix4.s_addr == mp->peer.s_addr) { | |
728 | return true; | |
729 | } | |
730 | ||
d62a17ae | 731 | return false; |
3c72d654 | 732 | } |
d62a17ae | 733 | |
3c72d654 | 734 | /************************ Peer session management **************************/ |
d62a17ae | 735 | char *pim_msdp_state_dump(enum pim_msdp_peer_state state, char *buf, |
736 | int buf_size) | |
737 | { | |
738 | switch (state) { | |
739 | case PIM_MSDP_DISABLED: | |
740 | snprintf(buf, buf_size, "%s", "disabled"); | |
741 | break; | |
742 | case PIM_MSDP_INACTIVE: | |
743 | snprintf(buf, buf_size, "%s", "inactive"); | |
744 | break; | |
745 | case PIM_MSDP_LISTEN: | |
746 | snprintf(buf, buf_size, "%s", "listen"); | |
747 | break; | |
748 | case PIM_MSDP_CONNECTING: | |
749 | snprintf(buf, buf_size, "%s", "connecting"); | |
750 | break; | |
751 | case PIM_MSDP_ESTABLISHED: | |
752 | snprintf(buf, buf_size, "%s", "established"); | |
753 | break; | |
754 | default: | |
755 | snprintf(buf, buf_size, "unk-%d", state); | |
756 | } | |
757 | return buf; | |
758 | } | |
759 | ||
d62a17ae | 760 | static void pim_msdp_peer_state_chg_log(struct pim_msdp_peer *mp) |
761 | { | |
762 | char state_str[PIM_MSDP_STATE_STRLEN]; | |
763 | ||
764 | pim_msdp_state_dump(mp->state, state_str, sizeof(state_str)); | |
765 | zlog_debug("MSDP peer %s state chg to %s", mp->key_str, state_str); | |
2a333e0f | 766 | } |
767 | ||
768 | /* MSDP Connection State Machine actions (defined in RFC-3618:Sec-11.2) */ | |
769 | /* 11.2.A2: active peer - start connect retry timer; when the timer fires | |
770 | * a tcp connection will be made */ | |
d62a17ae | 771 | static void pim_msdp_peer_connect(struct pim_msdp_peer *mp) |
2a333e0f | 772 | { |
d62a17ae | 773 | mp->state = PIM_MSDP_CONNECTING; |
774 | if (PIM_DEBUG_MSDP_EVENTS) { | |
775 | pim_msdp_peer_state_chg_log(mp); | |
776 | } | |
2a333e0f | 777 | |
d62a17ae | 778 | pim_msdp_peer_cr_timer_setup(mp, true /* start */); |
2a333e0f | 779 | } |
780 | ||
781 | /* 11.2.A3: passive peer - just listen for connections */ | |
d62a17ae | 782 | static void pim_msdp_peer_listen(struct pim_msdp_peer *mp) |
2a333e0f | 783 | { |
d62a17ae | 784 | mp->state = PIM_MSDP_LISTEN; |
785 | if (PIM_DEBUG_MSDP_EVENTS) { | |
786 | pim_msdp_peer_state_chg_log(mp); | |
787 | } | |
2a333e0f | 788 | |
d62a17ae | 789 | /* this is interntionally asymmetric i.e. we set up listen-socket when |
9d303b37 DL |
790 | * the |
791 | * first listening peer is configured; but don't bother tearing it down | |
792 | * when | |
793 | * all the peers go down */ | |
472ad383 | 794 | pim_msdp_sock_listen(mp->pim); |
2a333e0f | 795 | } |
796 | ||
797 | /* 11.2.A4 and 11.2.A5: transition active or passive peer to | |
798 | * established state */ | |
d62a17ae | 799 | void pim_msdp_peer_established(struct pim_msdp_peer *mp) |
2a333e0f | 800 | { |
d62a17ae | 801 | if (mp->state != PIM_MSDP_ESTABLISHED) { |
802 | ++mp->est_flaps; | |
803 | } | |
977d71cc | 804 | |
d62a17ae | 805 | mp->state = PIM_MSDP_ESTABLISHED; |
806 | mp->uptime = pim_time_monotonic_sec(); | |
2a333e0f | 807 | |
d62a17ae | 808 | if (PIM_DEBUG_MSDP_EVENTS) { |
809 | pim_msdp_peer_state_chg_log(mp); | |
810 | } | |
2a333e0f | 811 | |
d62a17ae | 812 | /* stop retry timer on active peers */ |
813 | pim_msdp_peer_cr_timer_setup(mp, false /* start */); | |
2a333e0f | 814 | |
d62a17ae | 815 | /* send KA; start KA and hold timers */ |
816 | pim_msdp_pkt_ka_tx(mp); | |
817 | pim_msdp_peer_ka_timer_setup(mp, true /* start */); | |
818 | pim_msdp_peer_hold_timer_setup(mp, true /* start */); | |
2a333e0f | 819 | |
d62a17ae | 820 | pim_msdp_pkt_sa_tx_to_one_peer(mp); |
3c72d654 | 821 | |
d62a17ae | 822 | PIM_MSDP_PEER_WRITE_ON(mp); |
823 | PIM_MSDP_PEER_READ_ON(mp); | |
2a333e0f | 824 | } |
825 | ||
826 | /* 11.2.A6, 11.2.A7 and 11.2.A8: shutdown the peer tcp connection */ | |
d62a17ae | 827 | void pim_msdp_peer_stop_tcp_conn(struct pim_msdp_peer *mp, bool chg_state) |
828 | { | |
829 | if (chg_state) { | |
830 | if (mp->state == PIM_MSDP_ESTABLISHED) { | |
831 | ++mp->est_flaps; | |
832 | } | |
833 | mp->state = PIM_MSDP_INACTIVE; | |
834 | if (PIM_DEBUG_MSDP_EVENTS) { | |
835 | pim_msdp_peer_state_chg_log(mp); | |
836 | } | |
837 | } | |
838 | ||
839 | if (PIM_DEBUG_MSDP_INTERNAL) { | |
840 | zlog_debug("MSDP peer %s pim_msdp_peer_stop_tcp_conn", | |
841 | mp->key_str); | |
842 | } | |
843 | /* stop read and write threads */ | |
844 | PIM_MSDP_PEER_READ_OFF(mp); | |
845 | PIM_MSDP_PEER_WRITE_OFF(mp); | |
846 | ||
847 | /* reset buffers */ | |
848 | mp->packet_size = 0; | |
849 | if (mp->ibuf) | |
850 | stream_reset(mp->ibuf); | |
851 | if (mp->obuf) | |
852 | stream_fifo_clean(mp->obuf); | |
853 | ||
854 | /* stop all peer timers */ | |
855 | pim_msdp_peer_ka_timer_setup(mp, false /* start */); | |
856 | pim_msdp_peer_cr_timer_setup(mp, false /* start */); | |
857 | pim_msdp_peer_hold_timer_setup(mp, false /* start */); | |
858 | ||
859 | /* close connection */ | |
860 | if (mp->fd >= 0) { | |
861 | close(mp->fd); | |
862 | mp->fd = -1; | |
863 | } | |
2a333e0f | 864 | } |
865 | ||
866 | /* RFC-3618:Sec-5.6 - stop the peer tcp connection and startover */ | |
d62a17ae | 867 | void pim_msdp_peer_reset_tcp_conn(struct pim_msdp_peer *mp, const char *rc_str) |
2a333e0f | 868 | { |
d62a17ae | 869 | if (PIM_DEBUG_EVENTS) { |
870 | zlog_debug("MSDP peer %s tcp reset %s", mp->key_str, rc_str); | |
871 | snprintf(mp->last_reset, sizeof(mp->last_reset), "%s", rc_str); | |
872 | } | |
2a333e0f | 873 | |
d62a17ae | 874 | /* close the connection and transition to listening or connecting */ |
875 | pim_msdp_peer_stop_tcp_conn(mp, true /* chg_state */); | |
876 | if (PIM_MSDP_PEER_IS_LISTENER(mp)) { | |
877 | pim_msdp_peer_listen(mp); | |
878 | } else { | |
879 | pim_msdp_peer_connect(mp); | |
880 | } | |
2a333e0f | 881 | } |
882 | ||
d62a17ae | 883 | static void pim_msdp_peer_timer_expiry_log(struct pim_msdp_peer *mp, |
884 | const char *timer_str) | |
2a333e0f | 885 | { |
d62a17ae | 886 | zlog_debug("MSDP peer %s %s timer expired", mp->key_str, timer_str); |
2a333e0f | 887 | } |
888 | ||
889 | /* RFC-3618:Sec-5.4 - peer hold timer */ | |
d62a17ae | 890 | static int pim_msdp_peer_hold_timer_cb(struct thread *t) |
2a333e0f | 891 | { |
d62a17ae | 892 | struct pim_msdp_peer *mp; |
2a333e0f | 893 | |
d62a17ae | 894 | mp = THREAD_ARG(t); |
2a333e0f | 895 | |
d62a17ae | 896 | if (PIM_DEBUG_MSDP_EVENTS) { |
897 | pim_msdp_peer_timer_expiry_log(mp, "hold"); | |
898 | } | |
2a333e0f | 899 | |
d62a17ae | 900 | if (mp->state != PIM_MSDP_ESTABLISHED) { |
901 | return 0; | |
902 | } | |
2a333e0f | 903 | |
d62a17ae | 904 | if (PIM_DEBUG_MSDP_EVENTS) { |
905 | pim_msdp_peer_state_chg_log(mp); | |
906 | } | |
907 | pim_msdp_peer_reset_tcp_conn(mp, "ht-expired"); | |
908 | return 0; | |
2a333e0f | 909 | } |
472ad383 | 910 | |
d62a17ae | 911 | static void pim_msdp_peer_hold_timer_setup(struct pim_msdp_peer *mp, bool start) |
2a333e0f | 912 | { |
472ad383 | 913 | struct pim_instance *pim = mp->pim; |
d62a17ae | 914 | THREAD_OFF(mp->hold_timer); |
915 | if (start) { | |
472ad383 | 916 | thread_add_timer(pim->msdp.master, pim_msdp_peer_hold_timer_cb, |
622fd3f1 | 917 | mp, pim->msdp.hold_time, &mp->hold_timer); |
d62a17ae | 918 | } |
2a333e0f | 919 | } |
920 | ||
921 | ||
922 | /* RFC-3618:Sec-5.5 - peer keepalive timer */ | |
d62a17ae | 923 | static int pim_msdp_peer_ka_timer_cb(struct thread *t) |
2a333e0f | 924 | { |
d62a17ae | 925 | struct pim_msdp_peer *mp; |
2a333e0f | 926 | |
d62a17ae | 927 | mp = THREAD_ARG(t); |
2a333e0f | 928 | |
d62a17ae | 929 | if (PIM_DEBUG_MSDP_EVENTS) { |
930 | pim_msdp_peer_timer_expiry_log(mp, "ka"); | |
931 | } | |
2a333e0f | 932 | |
d62a17ae | 933 | pim_msdp_pkt_ka_tx(mp); |
934 | pim_msdp_peer_ka_timer_setup(mp, true /* start */); | |
935 | return 0; | |
2a333e0f | 936 | } |
d62a17ae | 937 | static void pim_msdp_peer_ka_timer_setup(struct pim_msdp_peer *mp, bool start) |
2a333e0f | 938 | { |
d62a17ae | 939 | THREAD_OFF(mp->ka_timer); |
940 | if (start) { | |
472ad383 DS |
941 | thread_add_timer(mp->pim->msdp.master, |
942 | pim_msdp_peer_ka_timer_cb, mp, | |
622fd3f1 | 943 | mp->pim->msdp.keep_alive, &mp->ka_timer); |
d62a17ae | 944 | } |
2a333e0f | 945 | } |
946 | ||
d62a17ae | 947 | static void pim_msdp_peer_active_connect(struct pim_msdp_peer *mp) |
2a333e0f | 948 | { |
d62a17ae | 949 | int rc; |
950 | ++mp->conn_attempts; | |
951 | rc = pim_msdp_sock_connect(mp); | |
2a333e0f | 952 | |
d62a17ae | 953 | if (PIM_DEBUG_MSDP_INTERNAL) { |
954 | zlog_debug("MSDP peer %s pim_msdp_peer_active_connect: %d", | |
955 | mp->key_str, rc); | |
956 | } | |
2a333e0f | 957 | |
d62a17ae | 958 | switch (rc) { |
959 | case connect_error: | |
960 | case -1: | |
961 | /* connect failed restart the connect-retry timer */ | |
962 | pim_msdp_peer_cr_timer_setup(mp, true /* start */); | |
963 | break; | |
2a333e0f | 964 | |
d62a17ae | 965 | case connect_success: |
966 | /* connect was sucessful move to established */ | |
967 | pim_msdp_peer_established(mp); | |
968 | break; | |
2a333e0f | 969 | |
d62a17ae | 970 | case connect_in_progress: |
971 | /* for NB content we need to wait till sock is readable or | |
972 | * writeable */ | |
973 | PIM_MSDP_PEER_WRITE_ON(mp); | |
974 | PIM_MSDP_PEER_READ_ON(mp); | |
975 | /* also restart connect-retry timer to reset the socket if | |
976 | * connect is | |
977 | * not sucessful */ | |
978 | pim_msdp_peer_cr_timer_setup(mp, true /* start */); | |
979 | break; | |
980 | } | |
2a333e0f | 981 | } |
982 | ||
983 | /* RFC-3618:Sec-5.6 - connection retry on active peer */ | |
d62a17ae | 984 | static int pim_msdp_peer_cr_timer_cb(struct thread *t) |
2a333e0f | 985 | { |
d62a17ae | 986 | struct pim_msdp_peer *mp; |
2a333e0f | 987 | |
d62a17ae | 988 | mp = THREAD_ARG(t); |
2a333e0f | 989 | |
d62a17ae | 990 | if (PIM_DEBUG_MSDP_EVENTS) { |
991 | pim_msdp_peer_timer_expiry_log(mp, "connect-retry"); | |
992 | } | |
2a333e0f | 993 | |
d62a17ae | 994 | if (mp->state != PIM_MSDP_CONNECTING || PIM_MSDP_PEER_IS_LISTENER(mp)) { |
995 | return 0; | |
996 | } | |
2a333e0f | 997 | |
d62a17ae | 998 | pim_msdp_peer_active_connect(mp); |
999 | return 0; | |
2a333e0f | 1000 | } |
d62a17ae | 1001 | static void pim_msdp_peer_cr_timer_setup(struct pim_msdp_peer *mp, bool start) |
2a333e0f | 1002 | { |
d62a17ae | 1003 | THREAD_OFF(mp->cr_timer); |
1004 | if (start) { | |
622fd3f1 RZ |
1005 | thread_add_timer(mp->pim->msdp.master, |
1006 | pim_msdp_peer_cr_timer_cb, mp, | |
1007 | mp->pim->msdp.connection_retry, &mp->cr_timer); | |
d62a17ae | 1008 | } |
2a333e0f | 1009 | } |
1010 | ||
1011 | /* if a valid packet is rxed from the peer we can restart hold timer */ | |
d62a17ae | 1012 | void pim_msdp_peer_pkt_rxed(struct pim_msdp_peer *mp) |
2a333e0f | 1013 | { |
d62a17ae | 1014 | if (mp->state == PIM_MSDP_ESTABLISHED) { |
1015 | pim_msdp_peer_hold_timer_setup(mp, true /* start */); | |
1016 | } | |
2a333e0f | 1017 | } |
1018 | ||
3c72d654 | 1019 | /* if a valid packet is txed to the peer we can restart ka timer and avoid |
1020 | * unnecessary ka noise in the network */ | |
d62a17ae | 1021 | void pim_msdp_peer_pkt_txed(struct pim_msdp_peer *mp) |
3c72d654 | 1022 | { |
d62a17ae | 1023 | if (mp->state == PIM_MSDP_ESTABLISHED) { |
1024 | pim_msdp_peer_ka_timer_setup(mp, true /* start */); | |
1025 | if (PIM_DEBUG_MSDP_INTERNAL) { | |
1026 | zlog_debug("MSDP ka timer restart on pkt tx to %s", | |
1027 | mp->key_str); | |
1028 | } | |
1029 | } | |
3c72d654 | 1030 | } |
1031 | ||
2a333e0f | 1032 | static void pim_msdp_addr2su(union sockunion *su, struct in_addr addr) |
1033 | { | |
d62a17ae | 1034 | sockunion_init(su); |
1035 | su->sin.sin_addr = addr; | |
1036 | su->sin.sin_family = AF_INET; | |
2a333e0f | 1037 | #ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN |
d62a17ae | 1038 | su->sin.sin_len = sizeof(struct sockaddr_in); |
2a333e0f | 1039 | #endif /* HAVE_STRUCT_SOCKADDR_IN_SIN_LEN */ |
1040 | } | |
1041 | ||
1042 | /* 11.2.A1: create a new peer and transition state to listen or connecting */ | |
c72d97a5 | 1043 | struct pim_msdp_peer *pim_msdp_peer_add(struct pim_instance *pim, |
56697b3e RZ |
1044 | const struct in_addr *peer, |
1045 | const struct in_addr *local, | |
1046 | const char *mesh_group_name) | |
d62a17ae | 1047 | { |
1048 | struct pim_msdp_peer *mp; | |
1049 | ||
472ad383 | 1050 | pim_msdp_enable(pim); |
d62a17ae | 1051 | |
1052 | mp = XCALLOC(MTYPE_PIM_MSDP_PEER, sizeof(*mp)); | |
d62a17ae | 1053 | |
472ad383 | 1054 | mp->pim = pim; |
56697b3e | 1055 | mp->peer = *peer; |
d62a17ae | 1056 | pim_inet4_dump("<peer?>", mp->peer, mp->key_str, sizeof(mp->key_str)); |
1057 | pim_msdp_addr2su(&mp->su_peer, mp->peer); | |
56697b3e | 1058 | mp->local = *local; |
d62a17ae | 1059 | /* XXX: originator_id setting needs to move to the mesh group */ |
56697b3e | 1060 | pim->msdp.originator_id = *local; |
d62a17ae | 1061 | pim_msdp_addr2su(&mp->su_local, mp->local); |
0ce04a08 RZ |
1062 | if (mesh_group_name) |
1063 | mp->mesh_group_name = | |
1064 | XSTRDUP(MTYPE_PIM_MSDP_MG_NAME, mesh_group_name); | |
1065 | ||
d62a17ae | 1066 | mp->state = PIM_MSDP_INACTIVE; |
1067 | mp->fd = -1; | |
c35b7e6b | 1068 | strlcpy(mp->last_reset, "-", sizeof(mp->last_reset)); |
d62a17ae | 1069 | /* higher IP address is listener */ |
1070 | if (ntohl(mp->local.s_addr) > ntohl(mp->peer.s_addr)) { | |
1071 | mp->flags |= PIM_MSDP_PEERF_LISTENER; | |
1072 | } | |
1073 | ||
1074 | /* setup packet buffers */ | |
1075 | mp->ibuf = stream_new(PIM_MSDP_MAX_PACKET_SIZE); | |
1076 | mp->obuf = stream_fifo_new(); | |
1077 | ||
1078 | /* insert into misc tables for easy access */ | |
472ad383 DS |
1079 | mp = hash_get(pim->msdp.peer_hash, mp, hash_alloc_intern); |
1080 | listnode_add_sort(pim->msdp.peer_list, mp); | |
d62a17ae | 1081 | |
1082 | if (PIM_DEBUG_MSDP_EVENTS) { | |
1083 | zlog_debug("MSDP peer %s created", mp->key_str); | |
1084 | ||
1085 | pim_msdp_peer_state_chg_log(mp); | |
1086 | } | |
1087 | ||
1088 | /* fireup the connect state machine */ | |
1089 | if (PIM_MSDP_PEER_IS_LISTENER(mp)) { | |
1090 | pim_msdp_peer_listen(mp); | |
1091 | } else { | |
1092 | pim_msdp_peer_connect(mp); | |
1093 | } | |
56697b3e | 1094 | return mp; |
d62a17ae | 1095 | } |
1096 | ||
472ad383 DS |
1097 | struct pim_msdp_peer *pim_msdp_peer_find(struct pim_instance *pim, |
1098 | struct in_addr peer_addr) | |
d62a17ae | 1099 | { |
1100 | struct pim_msdp_peer lookup; | |
1101 | ||
1102 | lookup.peer = peer_addr; | |
472ad383 | 1103 | return hash_lookup(pim->msdp.peer_hash, &lookup); |
2a333e0f | 1104 | } |
1105 | ||
2a333e0f | 1106 | /* release all mem associated with a peer */ |
d62a17ae | 1107 | static void pim_msdp_peer_free(struct pim_msdp_peer *mp) |
11128587 | 1108 | { |
ec2f0e53 DS |
1109 | /* |
1110 | * Let's make sure we are not running when we delete | |
1111 | * the underlying data structure | |
1112 | */ | |
845d9af7 | 1113 | pim_msdp_peer_stop_tcp_conn(mp, false); |
ec2f0e53 | 1114 | |
d62a17ae | 1115 | if (mp->ibuf) { |
1116 | stream_free(mp->ibuf); | |
1117 | } | |
2a333e0f | 1118 | |
d62a17ae | 1119 | if (mp->obuf) { |
1120 | stream_fifo_free(mp->obuf); | |
1121 | } | |
2a333e0f | 1122 | |
e1b36e13 | 1123 | XFREE(MTYPE_PIM_MSDP_MG_NAME, mp->mesh_group_name); |
845d9af7 DS |
1124 | |
1125 | mp->pim = NULL; | |
d62a17ae | 1126 | XFREE(MTYPE_PIM_MSDP_PEER, mp); |
2a333e0f | 1127 | } |
1128 | ||
1129 | /* delete the peer config */ | |
c72d97a5 | 1130 | void pim_msdp_peer_del(struct pim_msdp_peer **mp) |
2a333e0f | 1131 | { |
56697b3e RZ |
1132 | if (*mp == NULL) |
1133 | return; | |
1134 | ||
d62a17ae | 1135 | /* stop the tcp connection and shutdown all timers */ |
56697b3e | 1136 | pim_msdp_peer_stop_tcp_conn(*mp, true /* chg_state */); |
2a333e0f | 1137 | |
d62a17ae | 1138 | /* remove the session from various tables */ |
56697b3e RZ |
1139 | listnode_delete((*mp)->pim->msdp.peer_list, *mp); |
1140 | hash_release((*mp)->pim->msdp.peer_hash, *mp); | |
2a333e0f | 1141 | |
d62a17ae | 1142 | if (PIM_DEBUG_MSDP_EVENTS) { |
56697b3e | 1143 | zlog_debug("MSDP peer %s deleted", (*mp)->key_str); |
d62a17ae | 1144 | } |
2a333e0f | 1145 | |
d62a17ae | 1146 | /* free up any associated memory */ |
56697b3e RZ |
1147 | pim_msdp_peer_free(*mp); |
1148 | *mp = NULL; | |
2a333e0f | 1149 | } |
1150 | ||
56697b3e RZ |
1151 | void pim_msdp_peer_change_source(struct pim_msdp_peer *mp, |
1152 | const struct in_addr *addr) | |
977d71cc | 1153 | { |
56697b3e | 1154 | pim_msdp_peer_stop_tcp_conn(mp, true); |
977d71cc | 1155 | |
56697b3e | 1156 | mp->local = *addr; |
977d71cc | 1157 | |
56697b3e RZ |
1158 | if (PIM_MSDP_PEER_IS_LISTENER(mp)) |
1159 | pim_msdp_peer_listen(mp); | |
1160 | else | |
1161 | pim_msdp_peer_connect(mp); | |
977d71cc | 1162 | } |
1163 | ||
2a333e0f | 1164 | /* peer hash and peer list helpers */ |
d8b87afe | 1165 | static unsigned int pim_msdp_peer_hash_key_make(const void *p) |
2a333e0f | 1166 | { |
d8b87afe | 1167 | const struct pim_msdp_peer *mp = p; |
d62a17ae | 1168 | return (jhash_1word(mp->peer.s_addr, 0)); |
2a333e0f | 1169 | } |
1170 | ||
74df8d6d | 1171 | static bool pim_msdp_peer_hash_eq(const void *p1, const void *p2) |
2a333e0f | 1172 | { |
d62a17ae | 1173 | const struct pim_msdp_peer *mp1 = p1; |
1174 | const struct pim_msdp_peer *mp2 = p2; | |
2a333e0f | 1175 | |
d62a17ae | 1176 | return (mp1->peer.s_addr == mp2->peer.s_addr); |
2a333e0f | 1177 | } |
1178 | ||
d62a17ae | 1179 | static int pim_msdp_peer_comp(const void *p1, const void *p2) |
2a333e0f | 1180 | { |
d62a17ae | 1181 | const struct pim_msdp_peer *mp1 = p1; |
1182 | const struct pim_msdp_peer *mp2 = p2; | |
2a333e0f | 1183 | |
d62a17ae | 1184 | if (ntohl(mp1->peer.s_addr) < ntohl(mp2->peer.s_addr)) |
1185 | return -1; | |
2a333e0f | 1186 | |
d62a17ae | 1187 | if (ntohl(mp1->peer.s_addr) > ntohl(mp2->peer.s_addr)) |
1188 | return 1; | |
2a333e0f | 1189 | |
d62a17ae | 1190 | return 0; |
2a333e0f | 1191 | } |
1192 | ||
977d71cc | 1193 | /************************** Mesh group management **************************/ |
e2809e61 | 1194 | void pim_msdp_mg_free(struct pim_instance *pim, struct pim_msdp_mg **mgp) |
977d71cc | 1195 | { |
e2809e61 RZ |
1196 | struct pim_msdp_mg_mbr *mbr; |
1197 | struct listnode *n, *nn; | |
822d3c85 | 1198 | |
e2809e61 | 1199 | if (*mgp == NULL) |
d62a17ae | 1200 | return; |
e2809e61 RZ |
1201 | |
1202 | /* SIP is being removed - tear down all active peer sessions */ | |
1203 | for (ALL_LIST_ELEMENTS((*mgp)->mbr_list, n, nn, mbr)) | |
fb35f654 | 1204 | pim_msdp_mg_mbr_del((*mgp), mbr); |
977d71cc | 1205 | |
d62a17ae | 1206 | if (PIM_DEBUG_MSDP_EVENTS) { |
e2809e61 RZ |
1207 | zlog_debug("MSDP mesh-group %s deleted", |
1208 | (*mgp)->mesh_group_name); | |
d62a17ae | 1209 | } |
977d71cc | 1210 | |
e2809e61 RZ |
1211 | XFREE(MTYPE_PIM_MSDP_MG_NAME, (*mgp)->mesh_group_name); |
1212 | ||
1213 | if ((*mgp)->mbr_list) | |
1214 | list_delete(&(*mgp)->mbr_list); | |
b9b1e1f2 | 1215 | |
3e7ec159 | 1216 | SLIST_REMOVE(&pim->msdp.mglist, (*mgp), pim_msdp_mg, mg_entry); |
e2809e61 | 1217 | XFREE(MTYPE_PIM_MSDP_MG, (*mgp)); |
977d71cc | 1218 | } |
1219 | ||
e2809e61 RZ |
1220 | struct pim_msdp_mg *pim_msdp_mg_new(struct pim_instance *pim, |
1221 | const char *mesh_group_name) | |
977d71cc | 1222 | { |
d62a17ae | 1223 | struct pim_msdp_mg *mg; |
977d71cc | 1224 | |
d62a17ae | 1225 | mg = XCALLOC(MTYPE_PIM_MSDP_MG, sizeof(*mg)); |
977d71cc | 1226 | |
d62a17ae | 1227 | mg->mesh_group_name = XSTRDUP(MTYPE_PIM_MSDP_MG_NAME, mesh_group_name); |
1228 | mg->mbr_list = list_new(); | |
1229 | mg->mbr_list->del = (void (*)(void *))pim_msdp_mg_mbr_free; | |
1230 | mg->mbr_list->cmp = (int (*)(void *, void *))pim_msdp_mg_mbr_comp; | |
977d71cc | 1231 | |
d62a17ae | 1232 | if (PIM_DEBUG_MSDP_EVENTS) { |
1233 | zlog_debug("MSDP mesh-group %s created", mg->mesh_group_name); | |
1234 | } | |
977d71cc | 1235 | |
e2809e61 | 1236 | SLIST_INSERT_HEAD(&pim->msdp.mglist, mg, mg_entry); |
977d71cc | 1237 | |
e2809e61 | 1238 | return mg; |
977d71cc | 1239 | } |
1240 | ||
d62a17ae | 1241 | static int pim_msdp_mg_mbr_comp(const void *p1, const void *p2) |
977d71cc | 1242 | { |
d62a17ae | 1243 | const struct pim_msdp_mg_mbr *mbr1 = p1; |
1244 | const struct pim_msdp_mg_mbr *mbr2 = p2; | |
977d71cc | 1245 | |
d62a17ae | 1246 | if (ntohl(mbr1->mbr_ip.s_addr) < ntohl(mbr2->mbr_ip.s_addr)) |
1247 | return -1; | |
977d71cc | 1248 | |
d62a17ae | 1249 | if (ntohl(mbr1->mbr_ip.s_addr) > ntohl(mbr2->mbr_ip.s_addr)) |
1250 | return 1; | |
977d71cc | 1251 | |
d62a17ae | 1252 | return 0; |
977d71cc | 1253 | } |
1254 | ||
d62a17ae | 1255 | static void pim_msdp_mg_mbr_free(struct pim_msdp_mg_mbr *mbr) |
977d71cc | 1256 | { |
d62a17ae | 1257 | XFREE(MTYPE_PIM_MSDP_MG_MBR, mbr); |
977d71cc | 1258 | } |
1259 | ||
fb35f654 | 1260 | void pim_msdp_mg_mbr_del(struct pim_msdp_mg *mg, struct pim_msdp_mg_mbr *mbr) |
977d71cc | 1261 | { |
d62a17ae | 1262 | /* Delete active peer session if any */ |
1263 | if (mbr->mp) { | |
c72d97a5 | 1264 | pim_msdp_peer_del(&mbr->mp); |
d62a17ae | 1265 | } |
977d71cc | 1266 | |
d62a17ae | 1267 | listnode_delete(mg->mbr_list, mbr); |
1268 | if (PIM_DEBUG_MSDP_EVENTS) { | |
1269 | char ip_str[INET_ADDRSTRLEN]; | |
1270 | pim_inet4_dump("<mbr?>", mbr->mbr_ip, ip_str, sizeof(ip_str)); | |
1271 | zlog_debug("MSDP mesh-group %s mbr %s deleted", | |
1272 | mg->mesh_group_name, ip_str); | |
1273 | } | |
1274 | pim_msdp_mg_mbr_free(mbr); | |
1275 | if (mg->mbr_cnt) { | |
1276 | --mg->mbr_cnt; | |
1277 | } | |
977d71cc | 1278 | } |
1279 | ||
fb35f654 | 1280 | static void pim_msdp_src_del(struct pim_msdp_mg *mg) |
d62a17ae | 1281 | { |
1282 | struct pim_msdp_mg_mbr *mbr; | |
1283 | struct listnode *mbr_node; | |
d62a17ae | 1284 | |
1285 | /* SIP is being removed - tear down all active peer sessions */ | |
1286 | for (ALL_LIST_ELEMENTS_RO(mg->mbr_list, mbr_node, mbr)) { | |
56697b3e | 1287 | if (mbr->mp) |
c72d97a5 | 1288 | pim_msdp_peer_del(&mbr->mp); |
d62a17ae | 1289 | } |
1290 | if (PIM_DEBUG_MSDP_EVENTS) { | |
1291 | zlog_debug("MSDP mesh-group %s src cleared", | |
1292 | mg->mesh_group_name); | |
1293 | } | |
1294 | } | |
1295 | ||
3c72d654 | 1296 | /*********************** MSDP feature APIs *********************************/ |
84f25989 DS |
1297 | int pim_msdp_config_write(struct pim_instance *pim, struct vty *vty, |
1298 | const char *spaces) | |
d62a17ae | 1299 | { |
e2809e61 | 1300 | struct pim_msdp_mg *mg; |
d62a17ae | 1301 | struct listnode *mbrnode; |
1302 | struct pim_msdp_mg_mbr *mbr; | |
d62a17ae | 1303 | char src_str[INET_ADDRSTRLEN]; |
1304 | int count = 0; | |
1305 | ||
e2809e61 | 1306 | if (SLIST_EMPTY(&pim->msdp.mglist)) |
d62a17ae | 1307 | return count; |
d62a17ae | 1308 | |
e2809e61 RZ |
1309 | SLIST_FOREACH (mg, &pim->msdp.mglist, mg_entry) { |
1310 | if (mg->src_ip.s_addr != INADDR_ANY) { | |
1311 | pim_inet4_dump("<src?>", mg->src_ip, src_str, | |
1312 | sizeof(src_str)); | |
1313 | vty_out(vty, "%sip msdp mesh-group %s source %s\n", | |
1314 | spaces, mg->mesh_group_name, src_str); | |
1315 | ++count; | |
1316 | } | |
d62a17ae | 1317 | |
e2809e61 | 1318 | for (ALL_LIST_ELEMENTS_RO(mg->mbr_list, mbrnode, mbr)) { |
97495b70 CS |
1319 | vty_out(vty, "%sip msdp mesh-group %s member %pI4\n", |
1320 | spaces, mg->mesh_group_name, &mbr->mbr_ip); | |
e2809e61 RZ |
1321 | ++count; |
1322 | } | |
d62a17ae | 1323 | } |
e2809e61 | 1324 | |
d62a17ae | 1325 | return count; |
472ad383 DS |
1326 | } |
1327 | ||
8c70c9e2 RZ |
1328 | bool pim_msdp_peer_config_write(struct vty *vty, struct pim_instance *pim, |
1329 | const char *spaces) | |
1330 | { | |
1331 | struct pim_msdp_peer *mp; | |
1332 | struct listnode *node; | |
1333 | bool written = false; | |
1334 | ||
1335 | for (ALL_LIST_ELEMENTS_RO(pim->msdp.peer_list, node, mp)) { | |
0ce04a08 RZ |
1336 | /* Skip meshed group peers. */ |
1337 | if (mp->flags & PIM_MSDP_PEERF_IN_GROUP) | |
8c70c9e2 RZ |
1338 | continue; |
1339 | ||
1340 | vty_out(vty, "%sip msdp peer %pI4 source %pI4\n", spaces, | |
1341 | &mp->peer, &mp->local); | |
1342 | written = true; | |
1343 | } | |
1344 | ||
1345 | return written; | |
1346 | } | |
1347 | ||
3c72d654 | 1348 | /* Enable feature including active/periodic timers etc. on the first peer |
1349 | * config. Till then MSDP should just stay quiet. */ | |
472ad383 | 1350 | static void pim_msdp_enable(struct pim_instance *pim) |
3c72d654 | 1351 | { |
472ad383 | 1352 | if (pim->msdp.flags & PIM_MSDPF_ENABLE) { |
d62a17ae | 1353 | /* feature is already enabled */ |
1354 | return; | |
1355 | } | |
472ad383 DS |
1356 | pim->msdp.flags |= PIM_MSDPF_ENABLE; |
1357 | pim->msdp.work_obuf = stream_new(PIM_MSDP_MAX_PACKET_SIZE); | |
1358 | pim_msdp_sa_adv_timer_setup(pim, true /* start */); | |
d62a17ae | 1359 | /* setup sa cache based on local sources */ |
472ad383 | 1360 | pim_msdp_sa_local_setup(pim); |
3c72d654 | 1361 | } |
1362 | ||
2a333e0f | 1363 | /* MSDP init */ |
64c86530 | 1364 | void pim_msdp_init(struct pim_instance *pim, struct thread_master *master) |
2a333e0f | 1365 | { |
472ad383 | 1366 | pim->msdp.master = master; |
9fb302f4 | 1367 | char hash_name[64]; |
3c72d654 | 1368 | |
772270f3 QY |
1369 | snprintf(hash_name, sizeof(hash_name), "PIM %s MSDP Peer Hash", |
1370 | pim->vrf->name); | |
2ad78035 | 1371 | pim->msdp.peer_hash = hash_create(pim_msdp_peer_hash_key_make, |
9fb302f4 | 1372 | pim_msdp_peer_hash_eq, hash_name); |
2ad78035 DS |
1373 | pim->msdp.peer_list = list_new(); |
1374 | pim->msdp.peer_list->del = (void (*)(void *))pim_msdp_peer_free; | |
1375 | pim->msdp.peer_list->cmp = (int (*)(void *, void *))pim_msdp_peer_comp; | |
3c72d654 | 1376 | |
772270f3 QY |
1377 | snprintf(hash_name, sizeof(hash_name), "PIM %s MSDP SA Hash", |
1378 | pim->vrf->name); | |
2ad78035 | 1379 | pim->msdp.sa_hash = hash_create(pim_msdp_sa_hash_key_make, |
9fb302f4 | 1380 | pim_msdp_sa_hash_eq, hash_name); |
2ad78035 DS |
1381 | pim->msdp.sa_list = list_new(); |
1382 | pim->msdp.sa_list->del = (void (*)(void *))pim_msdp_sa_free; | |
1383 | pim->msdp.sa_list->cmp = (int (*)(void *, void *))pim_msdp_sa_comp; | |
2a333e0f | 1384 | } |
1385 | ||
1386 | /* counterpart to MSDP init; XXX: unused currently */ | |
2ad78035 | 1387 | void pim_msdp_exit(struct pim_instance *pim) |
2a333e0f | 1388 | { |
e2809e61 | 1389 | struct pim_msdp_mg *mg; |
ec2f0e53 | 1390 | |
e2809e61 | 1391 | pim_msdp_sa_adv_timer_setup(pim, false); |
2a333e0f | 1392 | |
e2809e61 RZ |
1393 | /* Stop listener and delete all peer sessions */ |
1394 | while ((mg = SLIST_FIRST(&pim->msdp.mglist)) != NULL) | |
1395 | pim_msdp_mg_free(pim, &mg); | |
822d3c85 | 1396 | |
2ad78035 | 1397 | if (pim->msdp.peer_hash) { |
36ef2c10 | 1398 | hash_clean(pim->msdp.peer_hash, NULL); |
2ad78035 DS |
1399 | hash_free(pim->msdp.peer_hash); |
1400 | pim->msdp.peer_hash = NULL; | |
d62a17ae | 1401 | } |
2a333e0f | 1402 | |
2ad78035 | 1403 | if (pim->msdp.peer_list) { |
6a154c88 | 1404 | list_delete(&pim->msdp.peer_list); |
d62a17ae | 1405 | } |
3da8a099 DS |
1406 | |
1407 | if (pim->msdp.sa_hash) { | |
36ef2c10 | 1408 | hash_clean(pim->msdp.sa_hash, NULL); |
3da8a099 DS |
1409 | hash_free(pim->msdp.sa_hash); |
1410 | pim->msdp.sa_hash = NULL; | |
1411 | } | |
1412 | ||
1413 | if (pim->msdp.sa_list) { | |
6a154c88 | 1414 | list_delete(&pim->msdp.sa_list); |
3da8a099 | 1415 | } |
36ef2c10 DS |
1416 | |
1417 | if (pim->msdp.work_obuf) | |
1418 | stream_free(pim->msdp.work_obuf); | |
1419 | pim->msdp.work_obuf = NULL; | |
11128587 | 1420 | } |
e2809e61 | 1421 | |
fb35f654 RZ |
1422 | void pim_msdp_mg_src_add(struct pim_instance *pim, struct pim_msdp_mg *mg, |
1423 | struct in_addr *ai) | |
e2809e61 RZ |
1424 | { |
1425 | struct pim_msdp_mg_mbr *mbr; | |
1426 | struct listnode *mbr_node; | |
1427 | ||
1428 | /* Stop all connections and remove data structures. */ | |
fb35f654 | 1429 | pim_msdp_src_del(mg); |
e2809e61 RZ |
1430 | |
1431 | /* Set new address. */ | |
1432 | mg->src_ip = *ai; | |
1433 | ||
1434 | /* No new address, disable everyone. */ | |
1435 | if (ai->s_addr == INADDR_ANY) { | |
1436 | if (PIM_DEBUG_MSDP_EVENTS) | |
1437 | zlog_debug("MSDP mesh-group %s src unset", | |
1438 | mg->mesh_group_name); | |
1439 | return; | |
1440 | } | |
1441 | ||
1442 | /* Create data structures and start TCP connection. */ | |
1443 | for (ALL_LIST_ELEMENTS_RO(mg->mbr_list, mbr_node, mbr)) | |
c72d97a5 | 1444 | mbr->mp = pim_msdp_peer_add(pim, &mbr->mbr_ip, &mg->src_ip, |
56697b3e | 1445 | mg->mesh_group_name); |
e2809e61 RZ |
1446 | |
1447 | if (PIM_DEBUG_MSDP_EVENTS) | |
1448 | zlog_debug("MSDP mesh-group %s src %pI4 set", | |
1449 | mg->mesh_group_name, &mg->src_ip); | |
1450 | } | |
1451 | ||
fb35f654 RZ |
1452 | struct pim_msdp_mg_mbr *pim_msdp_mg_mbr_add(struct pim_instance *pim, |
1453 | struct pim_msdp_mg *mg, | |
1454 | struct in_addr *ia) | |
e2809e61 RZ |
1455 | { |
1456 | struct pim_msdp_mg_mbr *mbr; | |
1457 | ||
1458 | mbr = XCALLOC(MTYPE_PIM_MSDP_MG_MBR, sizeof(*mbr)); | |
1459 | mbr->mbr_ip = *ia; | |
1460 | listnode_add_sort(mg->mbr_list, mbr); | |
1461 | ||
1462 | /* if valid SIP has been configured add peer session */ | |
1463 | if (mg->src_ip.s_addr != INADDR_ANY) | |
c72d97a5 | 1464 | mbr->mp = pim_msdp_peer_add(pim, &mbr->mbr_ip, &mg->src_ip, |
56697b3e | 1465 | mg->mesh_group_name); |
e2809e61 RZ |
1466 | |
1467 | if (PIM_DEBUG_MSDP_EVENTS) | |
1468 | zlog_debug("MSDP mesh-group %s mbr %pI4 created", | |
1469 | mg->mesh_group_name, &mbr->mbr_ip); | |
1470 | ||
1471 | ++mg->mbr_cnt; | |
1472 | ||
1473 | return mbr; | |
1474 | } |