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e9e2c950 RZ |
1 | /********************************************************************* |
2 | * Copyright 2013 Cumulus Networks, LLC. All rights reserved. | |
3 | * Copyright 2014,2015,2016,2017 Cumulus Networks, Inc. All rights reserved. | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms of the GNU General Public License as published by the Free | |
7 | * Software Foundation; either version 2 of the License, or (at your option) | |
8 | * any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
11 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
12 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
13 | * more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License along | |
16 | * with this program; see the file COPYING; if not, write to the Free Software | |
17 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
18 | * | |
19 | * bfd.c: implements the BFD protocol. | |
20 | * | |
21 | * Authors | |
22 | * ------- | |
23 | * Shrijeet Mukherjee [shm@cumulusnetworks.com] | |
24 | * Kanna Rajagopal [kanna@cumulusnetworks.com] | |
25 | * Radhika Mahankali [Radhika@cumulusnetworks.com] | |
26 | */ | |
27 | ||
28 | #include <zebra.h> | |
29 | ||
e9e2c950 | 30 | #include "lib/jhash.h" |
5920b3eb | 31 | #include "lib/network.h" |
e9e2c950 RZ |
32 | |
33 | #include "bfd.h" | |
34 | ||
1b88c3cb | 35 | DEFINE_MTYPE_STATIC(BFDD, BFDD_CONFIG, "long-lived configuration memory") |
ccc9ada8 | 36 | DEFINE_MTYPE_STATIC(BFDD, BFDD_PROFILE, "long-lived profile memory") |
1b88c3cb DL |
37 | DEFINE_MTYPE_STATIC(BFDD, BFDD_SESSION_OBSERVER, "Session observer") |
38 | DEFINE_MTYPE_STATIC(BFDD, BFDD_VRF, "BFD VRF") | |
e9e2c950 RZ |
39 | |
40 | /* | |
41 | * Prototypes | |
42 | */ | |
43 | static uint32_t ptm_bfd_gen_ID(void); | |
44 | static void ptm_bfd_echo_xmt_TO(struct bfd_session *bfd); | |
e9e2c950 RZ |
45 | static struct bfd_session *bfd_find_disc(struct sockaddr_any *sa, |
46 | uint32_t ldisc); | |
47 | static int bfd_session_update(struct bfd_session *bs, struct bfd_peer_cfg *bpc); | |
48 | static const char *get_diag_str(int diag); | |
49 | ||
9f37770f RZ |
50 | static void bs_admin_down_handler(struct bfd_session *bs, int nstate); |
51 | static void bs_down_handler(struct bfd_session *bs, int nstate); | |
52 | static void bs_init_handler(struct bfd_session *bs, int nstate); | |
53 | static void bs_up_handler(struct bfd_session *bs, int nstate); | |
7555dc61 S |
54 | static void bs_neighbour_admin_down_handler(struct bfd_session *bfd, |
55 | uint8_t diag); | |
9f37770f | 56 | |
f6dfa247 RZ |
57 | /** |
58 | * Remove BFD profile from all BFD sessions so we don't leave dangling | |
59 | * pointers. | |
60 | */ | |
61 | static void bfd_profile_detach(struct bfd_profile *bp); | |
62 | ||
79b4a6fc RZ |
63 | /* Zeroed array with the size of an IPv6 address. */ |
64 | struct in6_addr zero_addr; | |
e9e2c950 | 65 | |
ccc9ada8 RZ |
66 | /** BFD profiles list. */ |
67 | struct bfdproflist bplist; | |
68 | ||
e9e2c950 RZ |
69 | /* |
70 | * Functions | |
71 | */ | |
ccc9ada8 RZ |
72 | struct bfd_profile *bfd_profile_lookup(const char *name) |
73 | { | |
74 | struct bfd_profile *bp; | |
75 | ||
76 | TAILQ_FOREACH (bp, &bplist, entry) { | |
77 | if (strcmp(name, bp->name)) | |
78 | continue; | |
79 | ||
80 | return bp; | |
81 | } | |
82 | ||
83 | return NULL; | |
84 | } | |
85 | ||
86 | static void bfd_profile_set_default(struct bfd_profile *bp) | |
87 | { | |
88 | bp->admin_shutdown = true; | |
89 | bp->detection_multiplier = BFD_DEFDETECTMULT; | |
90 | bp->echo_mode = false; | |
1a2e2fff | 91 | bp->passive = false; |
262e1d25 | 92 | bp->minimum_ttl = BFD_DEF_MHOP_TTL; |
ccc9ada8 RZ |
93 | bp->min_echo_rx = BFD_DEF_REQ_MIN_ECHO; |
94 | bp->min_rx = BFD_DEFREQUIREDMINRX; | |
95 | bp->min_tx = BFD_DEFDESIREDMINTX; | |
96 | } | |
97 | ||
98 | struct bfd_profile *bfd_profile_new(const char *name) | |
99 | { | |
100 | struct bfd_profile *bp; | |
101 | ||
102 | /* Search for duplicates. */ | |
103 | if (bfd_profile_lookup(name) != NULL) | |
104 | return NULL; | |
105 | ||
106 | /* Allocate, name it and put into list. */ | |
107 | bp = XCALLOC(MTYPE_BFDD_PROFILE, sizeof(*bp)); | |
108 | strlcpy(bp->name, name, sizeof(bp->name)); | |
109 | TAILQ_INSERT_TAIL(&bplist, bp, entry); | |
110 | ||
111 | /* Set default values. */ | |
112 | bfd_profile_set_default(bp); | |
113 | ||
114 | return bp; | |
115 | } | |
116 | ||
117 | void bfd_profile_free(struct bfd_profile *bp) | |
118 | { | |
f6dfa247 | 119 | /* Detach from any session. */ |
f3e1d224 RZ |
120 | if (bglobal.bg_shutdown == false) |
121 | bfd_profile_detach(bp); | |
f6dfa247 RZ |
122 | |
123 | /* Remove from global list. */ | |
ccc9ada8 | 124 | TAILQ_REMOVE(&bplist, bp, entry); |
dd8bc21d MS |
125 | |
126 | XFREE(MTYPE_BFDD_PROFILE, bp); | |
ccc9ada8 RZ |
127 | } |
128 | ||
ccc9ada8 RZ |
129 | void bfd_profile_apply(const char *profname, struct bfd_session *bs) |
130 | { | |
131 | struct bfd_profile *bp; | |
132 | ||
133 | /* Remove previous profile if any. */ | |
134 | if (bs->profile_name) { | |
ccc9ada8 RZ |
135 | /* We are changing profiles. */ |
136 | if (strcmp(bs->profile_name, profname)) { | |
137 | XFREE(MTYPE_BFDD_PROFILE, bs->profile_name); | |
138 | bs->profile_name = | |
139 | XSTRDUP(MTYPE_BFDD_PROFILE, profname); | |
140 | } | |
141 | } else /* Save the current profile name (in case it doesn't exist). */ | |
142 | bs->profile_name = XSTRDUP(MTYPE_BFDD_PROFILE, profname); | |
143 | ||
144 | /* Look up new profile to apply. */ | |
145 | bp = bfd_profile_lookup(profname); | |
ccc9ada8 RZ |
146 | |
147 | /* Point to profile if it exists. */ | |
148 | bs->profile = bp; | |
149 | ||
4e38f82a RZ |
150 | /* Apply configuration. */ |
151 | bfd_session_apply(bs); | |
152 | } | |
153 | ||
154 | void bfd_session_apply(struct bfd_session *bs) | |
155 | { | |
156 | struct bfd_profile *bp; | |
157 | uint32_t min_tx = bs->timers.desired_min_tx; | |
158 | uint32_t min_rx = bs->timers.required_min_rx; | |
159 | ||
160 | /* Pick the source of configuration. */ | |
161 | bp = bs->profile ? bs->profile : &bs->peer_profile; | |
162 | ||
ccc9ada8 RZ |
163 | /* Set multiplier if not the default. */ |
164 | if (bs->peer_profile.detection_multiplier == BFD_DEFDETECTMULT) | |
165 | bs->detect_mult = bp->detection_multiplier; | |
166 | else | |
167 | bs->detect_mult = bs->peer_profile.detection_multiplier; | |
168 | ||
169 | /* Set timers if not the default. */ | |
170 | if (bs->peer_profile.min_tx == BFD_DEFDESIREDMINTX) | |
171 | bs->timers.desired_min_tx = bp->min_tx; | |
172 | else | |
173 | bs->timers.desired_min_tx = bs->peer_profile.min_tx; | |
174 | ||
175 | if (bs->peer_profile.min_rx == BFD_DEFREQUIREDMINRX) | |
176 | bs->timers.required_min_rx = bp->min_rx; | |
177 | else | |
178 | bs->timers.required_min_rx = bs->peer_profile.min_rx; | |
179 | ||
180 | /* We can only apply echo options on single hop sessions. */ | |
181 | if (!CHECK_FLAG(bs->flags, BFD_SESS_FLAG_MH)) { | |
182 | /* Configure remote echo if it was default. */ | |
183 | if (bs->peer_profile.min_echo_rx == BFD_DEF_REQ_MIN_ECHO) | |
184 | bs->timers.required_min_echo = bp->min_echo_rx; | |
185 | else | |
186 | bs->timers.required_min_echo = | |
187 | bs->peer_profile.min_echo_rx; | |
188 | ||
189 | /* Toggle echo if default value. */ | |
190 | if (bs->peer_profile.echo_mode == false) | |
191 | bfd_set_echo(bs, bp->echo_mode); | |
192 | else | |
193 | bfd_set_echo(bs, bs->peer_profile.echo_mode); | |
262e1d25 RZ |
194 | } else { |
195 | /* Configure the TTL packet filter. */ | |
196 | if (bs->peer_profile.minimum_ttl == BFD_DEF_MHOP_TTL) | |
197 | bs->mh_ttl = bp->minimum_ttl; | |
198 | else | |
199 | bs->mh_ttl = bs->peer_profile.minimum_ttl; | |
ccc9ada8 RZ |
200 | } |
201 | ||
1a2e2fff RZ |
202 | /* Toggle 'passive-mode' if default value. */ |
203 | if (bs->peer_profile.passive == false) | |
204 | bfd_set_passive_mode(bs, bp->passive); | |
205 | else | |
206 | bfd_set_passive_mode(bs, bs->peer_profile.passive); | |
207 | ||
ccc9ada8 RZ |
208 | /* Toggle 'no shutdown' if default value. */ |
209 | if (bs->peer_profile.admin_shutdown) | |
210 | bfd_set_shutdown(bs, bp->admin_shutdown); | |
211 | else | |
212 | bfd_set_shutdown(bs, bs->peer_profile.admin_shutdown); | |
4e38f82a RZ |
213 | |
214 | /* If session interval changed negotiate new timers. */ | |
215 | if (bs->ses_state == PTM_BFD_UP | |
216 | && (bs->timers.desired_min_tx != min_tx | |
217 | || bs->timers.required_min_rx != min_rx)) | |
218 | bfd_set_polling(bs); | |
ccc9ada8 RZ |
219 | } |
220 | ||
221 | void bfd_profile_remove(struct bfd_session *bs) | |
222 | { | |
223 | /* Remove any previous set profile name. */ | |
224 | XFREE(MTYPE_BFDD_PROFILE, bs->profile_name); | |
4e38f82a | 225 | bs->profile = NULL; |
ccc9ada8 | 226 | |
4e38f82a | 227 | bfd_session_apply(bs); |
ccc9ada8 RZ |
228 | } |
229 | ||
79b4a6fc RZ |
230 | void gen_bfd_key(struct bfd_key *key, struct sockaddr_any *peer, |
231 | struct sockaddr_any *local, bool mhop, const char *ifname, | |
232 | const char *vrfname) | |
d245e522 | 233 | { |
79b4a6fc | 234 | memset(key, 0, sizeof(*key)); |
d245e522 | 235 | |
79b4a6fc RZ |
236 | switch (peer->sa_sin.sin_family) { |
237 | case AF_INET: | |
238 | key->family = AF_INET; | |
239 | memcpy(&key->peer, &peer->sa_sin.sin_addr, | |
240 | sizeof(peer->sa_sin.sin_addr)); | |
241 | memcpy(&key->local, &local->sa_sin.sin_addr, | |
242 | sizeof(local->sa_sin.sin_addr)); | |
243 | break; | |
244 | case AF_INET6: | |
245 | key->family = AF_INET6; | |
246 | memcpy(&key->peer, &peer->sa_sin6.sin6_addr, | |
247 | sizeof(peer->sa_sin6.sin6_addr)); | |
248 | memcpy(&key->local, &local->sa_sin6.sin6_addr, | |
249 | sizeof(local->sa_sin6.sin6_addr)); | |
d245e522 RZ |
250 | break; |
251 | } | |
d245e522 | 252 | |
79b4a6fc RZ |
253 | key->mhop = mhop; |
254 | if (ifname && ifname[0]) | |
255 | strlcpy(key->ifname, ifname, sizeof(key->ifname)); | |
256 | if (vrfname && vrfname[0]) | |
257 | strlcpy(key->vrfname, vrfname, sizeof(key->vrfname)); | |
adc26455 RZ |
258 | else |
259 | strlcpy(key->vrfname, VRF_DEFAULT_NAME, sizeof(key->vrfname)); | |
d245e522 RZ |
260 | } |
261 | ||
e9e2c950 RZ |
262 | struct bfd_session *bs_peer_find(struct bfd_peer_cfg *bpc) |
263 | { | |
264 | struct bfd_session *bs; | |
265 | struct peer_label *pl; | |
79b4a6fc | 266 | struct bfd_key key; |
e9e2c950 RZ |
267 | |
268 | /* Try to find label first. */ | |
269 | if (bpc->bpc_has_label) { | |
270 | pl = pl_find(bpc->bpc_label); | |
271 | if (pl != NULL) { | |
272 | bs = pl->pl_bs; | |
273 | return bs; | |
274 | } | |
275 | } | |
276 | ||
277 | /* Otherwise fallback to peer/local hash lookup. */ | |
79b4a6fc RZ |
278 | gen_bfd_key(&key, &bpc->bpc_peer, &bpc->bpc_local, bpc->bpc_mhop, |
279 | bpc->bpc_localif, bpc->bpc_vrfname); | |
e9e2c950 | 280 | |
79b4a6fc | 281 | return bfd_key_lookup(key); |
d245e522 RZ |
282 | } |
283 | ||
284 | /* | |
285 | * Starts a disabled BFD session. | |
286 | * | |
287 | * A session is disabled when the specified interface/VRF doesn't exist | |
288 | * yet. It might happen on FRR boot or with virtual interfaces. | |
289 | */ | |
290 | int bfd_session_enable(struct bfd_session *bs) | |
291 | { | |
d245e522 RZ |
292 | struct interface *ifp = NULL; |
293 | struct vrf *vrf = NULL; | |
294 | int psock; | |
295 | ||
296 | /* | |
297 | * If the interface or VRF doesn't exist, then we must register | |
298 | * the session but delay its start. | |
299 | */ | |
218afa36 PG |
300 | if (bs->key.vrfname[0]) { |
301 | vrf = vrf_lookup_by_name(bs->key.vrfname); | |
d245e522 | 302 | if (vrf == NULL) { |
259b64eb | 303 | zlog_err( |
79b4a6fc | 304 | "session-enable: specified VRF doesn't exists."); |
d245e522 RZ |
305 | return 0; |
306 | } | |
307 | } | |
308 | ||
218afa36 PG |
309 | if (bs->key.ifname[0]) { |
310 | if (vrf) | |
311 | ifp = if_lookup_by_name(bs->key.ifname, vrf->vrf_id); | |
312 | else | |
313 | ifp = if_lookup_by_name_all_vrf(bs->key.ifname); | |
314 | if (ifp == NULL) { | |
259b64eb RZ |
315 | zlog_err( |
316 | "session-enable: specified interface doesn't exists."); | |
d245e522 RZ |
317 | return 0; |
318 | } | |
218afa36 PG |
319 | if (bs->key.ifname[0] && !vrf) { |
320 | vrf = vrf_lookup_by_id(ifp->vrf_id); | |
321 | if (vrf == NULL) { | |
259b64eb RZ |
322 | zlog_err( |
323 | "session-enable: specified VRF doesn't exists."); | |
218afa36 PG |
324 | return 0; |
325 | } | |
326 | } | |
d245e522 RZ |
327 | } |
328 | ||
329 | /* Assign interface/VRF pointers. */ | |
330 | bs->vrf = vrf; | |
331 | if (bs->vrf == NULL) | |
332 | bs->vrf = vrf_lookup_by_id(VRF_DEFAULT); | |
102e2157 | 333 | assert(bs->vrf); |
d245e522 | 334 | |
79b4a6fc | 335 | if (bs->key.ifname[0] |
b88113ef | 336 | && CHECK_FLAG(bs->flags, BFD_SESS_FLAG_MH) == 0) |
d245e522 RZ |
337 | bs->ifp = ifp; |
338 | ||
261e0ba9 RZ |
339 | /* Sanity check: don't leak open sockets. */ |
340 | if (bs->sock != -1) { | |
48da2c31 RZ |
341 | if (bglobal.debug_peer_event) |
342 | zlog_debug("session-enable: previous socket open"); | |
343 | ||
261e0ba9 RZ |
344 | close(bs->sock); |
345 | bs->sock = -1; | |
346 | } | |
347 | ||
d245e522 RZ |
348 | /* |
349 | * Get socket for transmitting control packets. Note that if we | |
350 | * could use the destination port (3784) for the source | |
351 | * port we wouldn't need a socket per session. | |
352 | */ | |
b88113ef | 353 | if (CHECK_FLAG(bs->flags, BFD_SESS_FLAG_IPV6) == 0) { |
d245e522 RZ |
354 | psock = bp_peer_socket(bs); |
355 | if (psock == -1) | |
261e0ba9 | 356 | return 0; |
d245e522 RZ |
357 | } else { |
358 | psock = bp_peer_socketv6(bs); | |
359 | if (psock == -1) | |
261e0ba9 | 360 | return 0; |
d245e522 RZ |
361 | } |
362 | ||
363 | /* | |
364 | * We've got a valid socket, lets start the timers and the | |
365 | * protocol. | |
366 | */ | |
367 | bs->sock = psock; | |
1a2e2fff RZ |
368 | |
369 | /* Only start timers if we are using active mode. */ | |
370 | if (CHECK_FLAG(bs->flags, BFD_SESS_FLAG_PASSIVE) == 0) { | |
371 | bfd_recvtimer_update(bs); | |
372 | ptm_bfd_start_xmt_timer(bs, false); | |
373 | } | |
d245e522 | 374 | |
d245e522 RZ |
375 | return 0; |
376 | } | |
377 | ||
378 | /* | |
379 | * Disabled a running BFD session. | |
380 | * | |
381 | * A session is disabled when the specified interface/VRF gets removed | |
382 | * (e.g. virtual interfaces). | |
383 | */ | |
384 | void bfd_session_disable(struct bfd_session *bs) | |
385 | { | |
386 | /* Free up socket resources. */ | |
387 | if (bs->sock != -1) { | |
388 | close(bs->sock); | |
389 | bs->sock = -1; | |
390 | } | |
391 | ||
392 | /* Disable all timers. */ | |
393 | bfd_recvtimer_delete(bs); | |
d245e522 | 394 | bfd_xmttimer_delete(bs); |
8ee0862e | 395 | ptm_bfd_echo_stop(bs); |
c7666ae7 | 396 | bs->vrf = NULL; |
8ee0862e RZ |
397 | bs->ifp = NULL; |
398 | ||
399 | /* Set session down so it doesn't report UP and disabled. */ | |
400 | ptm_bfd_sess_dn(bs, BD_PATH_DOWN); | |
e9e2c950 RZ |
401 | } |
402 | ||
403 | static uint32_t ptm_bfd_gen_ID(void) | |
404 | { | |
843b324d | 405 | uint32_t session_id; |
e9e2c950 | 406 | |
843b324d RZ |
407 | /* |
408 | * RFC 5880, Section 6.8.1. recommends that we should generate | |
409 | * random session identification numbers. | |
410 | */ | |
411 | do { | |
5920b3eb RZ |
412 | session_id = ((frr_weak_random() << 16) & 0xFFFF0000) |
413 | | (frr_weak_random() & 0x0000FFFF); | |
843b324d RZ |
414 | } while (session_id == 0 || bfd_id_lookup(session_id) != NULL); |
415 | ||
416 | return session_id; | |
e9e2c950 RZ |
417 | } |
418 | ||
419 | void ptm_bfd_start_xmt_timer(struct bfd_session *bfd, bool is_echo) | |
420 | { | |
421 | uint64_t jitter, xmt_TO; | |
422 | int maxpercent; | |
423 | ||
424 | xmt_TO = is_echo ? bfd->echo_xmt_TO : bfd->xmt_TO; | |
425 | ||
426 | /* | |
427 | * From section 6.5.2: trasmit interval should be randomly jittered | |
428 | * between | |
429 | * 75% and 100% of nominal value, unless detect_mult is 1, then should | |
430 | * be | |
431 | * between 75% and 90%. | |
432 | */ | |
433 | maxpercent = (bfd->detect_mult == 1) ? 16 : 26; | |
5920b3eb | 434 | jitter = (xmt_TO * (75 + (frr_weak_random() % maxpercent))) / 100; |
e9e2c950 RZ |
435 | /* XXX remove that division above */ |
436 | ||
437 | if (is_echo) | |
438 | bfd_echo_xmttimer_update(bfd, jitter); | |
439 | else | |
440 | bfd_xmttimer_update(bfd, jitter); | |
441 | } | |
442 | ||
443 | static void ptm_bfd_echo_xmt_TO(struct bfd_session *bfd) | |
444 | { | |
445 | /* Send the scheduled echo packet */ | |
446 | ptm_bfd_echo_snd(bfd); | |
447 | ||
448 | /* Restart the timer for next time */ | |
449 | ptm_bfd_start_xmt_timer(bfd, true); | |
450 | } | |
451 | ||
452 | void ptm_bfd_xmt_TO(struct bfd_session *bfd, int fbit) | |
453 | { | |
454 | /* Send the scheduled control packet */ | |
455 | ptm_bfd_snd(bfd, fbit); | |
456 | ||
457 | /* Restart the timer for next time */ | |
458 | ptm_bfd_start_xmt_timer(bfd, false); | |
459 | } | |
460 | ||
8bd859f6 | 461 | void ptm_bfd_echo_stop(struct bfd_session *bfd) |
e9e2c950 RZ |
462 | { |
463 | bfd->echo_xmt_TO = 0; | |
464 | bfd->echo_detect_TO = 0; | |
b88113ef | 465 | UNSET_FLAG(bfd->flags, BFD_SESS_FLAG_ECHO_ACTIVE); |
e9e2c950 RZ |
466 | |
467 | bfd_echo_xmttimer_delete(bfd); | |
468 | bfd_echo_recvtimer_delete(bfd); | |
e9e2c950 RZ |
469 | } |
470 | ||
471 | void ptm_bfd_echo_start(struct bfd_session *bfd) | |
472 | { | |
473 | bfd->echo_detect_TO = (bfd->remote_detect_mult * bfd->echo_xmt_TO); | |
451eb5a2 RZ |
474 | if (bfd->echo_detect_TO > 0) |
475 | ptm_bfd_echo_xmt_TO(bfd); | |
e9e2c950 RZ |
476 | } |
477 | ||
bc50bcc8 | 478 | void ptm_bfd_sess_up(struct bfd_session *bfd) |
e9e2c950 | 479 | { |
03e7f088 RZ |
480 | int old_state = bfd->ses_state; |
481 | ||
e9e2c950 RZ |
482 | bfd->local_diag = 0; |
483 | bfd->ses_state = PTM_BFD_UP; | |
e9e2c950 RZ |
484 | monotime(&bfd->uptime); |
485 | ||
c0ef9a8a RZ |
486 | /* Connection is up, lets negotiate timers. */ |
487 | bfd_set_polling(bfd); | |
488 | ||
489 | /* Start sending control packets with poll bit immediately. */ | |
490 | ptm_bfd_snd(bfd, 0); | |
e9e2c950 | 491 | |
7555dc61 | 492 | control_notify(bfd, bfd->ses_state); |
e9e2c950 | 493 | |
0684c9b1 RZ |
494 | if (old_state != bfd->ses_state) { |
495 | bfd->stats.session_up++; | |
48da2c31 RZ |
496 | if (bglobal.debug_peer_event) |
497 | zlog_debug("state-change: [%s] %s -> %s", | |
498 | bs_to_string(bfd), state_list[old_state].str, | |
499 | state_list[bfd->ses_state].str); | |
0684c9b1 | 500 | } |
e9e2c950 RZ |
501 | } |
502 | ||
bc50bcc8 | 503 | void ptm_bfd_sess_dn(struct bfd_session *bfd, uint8_t diag) |
e9e2c950 RZ |
504 | { |
505 | int old_state = bfd->ses_state; | |
506 | ||
507 | bfd->local_diag = diag; | |
508 | bfd->discrs.remote_discr = 0; | |
509 | bfd->ses_state = PTM_BFD_DOWN; | |
510 | bfd->polling = 0; | |
511 | bfd->demand_mode = 0; | |
512 | monotime(&bfd->downtime); | |
513 | ||
8ee0862e RZ |
514 | /* |
515 | * Only attempt to send if we have a valid socket: | |
516 | * this function might be called by session disablers and in | |
517 | * this case we won't have a valid socket (i.e. interface was | |
518 | * removed or VRF doesn't exist anymore). | |
519 | */ | |
520 | if (bfd->sock != -1) | |
521 | ptm_bfd_snd(bfd, 0); | |
e9e2c950 | 522 | |
b912b189 RZ |
523 | /* Slow down the control packets, the connection is down. */ |
524 | bs_set_slow_timers(bfd); | |
525 | ||
e9e2c950 RZ |
526 | /* only signal clients when going from up->down state */ |
527 | if (old_state == PTM_BFD_UP) | |
7555dc61 | 528 | control_notify(bfd, PTM_BFD_DOWN); |
e9e2c950 | 529 | |
e9e2c950 | 530 | /* Stop echo packet transmission if they are active */ |
b88113ef | 531 | if (CHECK_FLAG(bfd->flags, BFD_SESS_FLAG_ECHO_ACTIVE)) |
8bd859f6 | 532 | ptm_bfd_echo_stop(bfd); |
03e7f088 | 533 | |
1a2e2fff RZ |
534 | /* Stop attempting to transmit or expect control packets if passive. */ |
535 | if (CHECK_FLAG(bfd->flags, BFD_SESS_FLAG_PASSIVE)) { | |
536 | bfd_recvtimer_delete(bfd); | |
537 | bfd_xmttimer_delete(bfd); | |
538 | } | |
539 | ||
0684c9b1 RZ |
540 | if (old_state != bfd->ses_state) { |
541 | bfd->stats.session_down++; | |
48da2c31 RZ |
542 | if (bglobal.debug_peer_event) |
543 | zlog_debug("state-change: [%s] %s -> %s reason:%s", | |
544 | bs_to_string(bfd), state_list[old_state].str, | |
545 | state_list[bfd->ses_state].str, | |
546 | get_diag_str(bfd->local_diag)); | |
0684c9b1 | 547 | } |
e9e2c950 RZ |
548 | } |
549 | ||
e9e2c950 RZ |
550 | static struct bfd_session *bfd_find_disc(struct sockaddr_any *sa, |
551 | uint32_t ldisc) | |
552 | { | |
553 | struct bfd_session *bs; | |
554 | ||
555 | bs = bfd_id_lookup(ldisc); | |
556 | if (bs == NULL) | |
557 | return NULL; | |
558 | ||
79b4a6fc | 559 | switch (bs->key.family) { |
e9e2c950 | 560 | case AF_INET: |
79b4a6fc RZ |
561 | if (memcmp(&sa->sa_sin.sin_addr, &bs->key.peer, |
562 | sizeof(sa->sa_sin.sin_addr))) | |
563 | return NULL; | |
e9e2c950 RZ |
564 | break; |
565 | case AF_INET6: | |
79b4a6fc RZ |
566 | if (memcmp(&sa->sa_sin6.sin6_addr, &bs->key.peer, |
567 | sizeof(sa->sa_sin6.sin6_addr))) | |
568 | return NULL; | |
e9e2c950 RZ |
569 | break; |
570 | } | |
571 | ||
79b4a6fc | 572 | return bs; |
e9e2c950 RZ |
573 | } |
574 | ||
b333abc2 | 575 | struct bfd_session *ptm_bfd_sess_find(struct bfd_pkt *cp, |
e9e2c950 RZ |
576 | struct sockaddr_any *peer, |
577 | struct sockaddr_any *local, | |
b333abc2 RZ |
578 | ifindex_t ifindex, vrf_id_t vrfid, |
579 | bool is_mhop) | |
e9e2c950 | 580 | { |
79b4a6fc RZ |
581 | struct interface *ifp; |
582 | struct vrf *vrf; | |
583 | struct bfd_key key; | |
e9e2c950 | 584 | |
9d63adda RZ |
585 | /* Find our session using the ID signaled by the remote end. */ |
586 | if (cp->discrs.remote_discr) | |
587 | return bfd_find_disc(peer, ntohl(cp->discrs.remote_discr)); | |
588 | ||
d1ca89ae RZ |
589 | /* |
590 | * Search for session without using discriminator. | |
591 | * | |
592 | * XXX: we can't trust `vrfid` because the VRF handling is not | |
593 | * properly implemented. Meanwhile we should use the interface | |
594 | * VRF to find out which one it belongs. | |
595 | */ | |
596 | ifp = if_lookup_by_index_all_vrf(ifindex); | |
597 | if (ifp == NULL) { | |
598 | if (vrfid != VRF_DEFAULT) | |
599 | vrf = vrf_lookup_by_id(vrfid); | |
600 | else | |
601 | vrf = NULL; | |
602 | } else | |
603 | vrf = vrf_lookup_by_id(ifp->vrf_id); | |
9d63adda | 604 | |
79b4a6fc | 605 | gen_bfd_key(&key, peer, local, is_mhop, ifp ? ifp->name : NULL, |
adc26455 | 606 | vrf ? vrf->name : VRF_DEFAULT_NAME); |
e9e2c950 | 607 | |
9d63adda | 608 | /* XXX maybe remoteDiscr should be checked for remoteHeard cases. */ |
79b4a6fc | 609 | return bfd_key_lookup(key); |
e9e2c950 RZ |
610 | } |
611 | ||
e9e2c950 RZ |
612 | int bfd_xmt_cb(struct thread *t) |
613 | { | |
614 | struct bfd_session *bs = THREAD_ARG(t); | |
615 | ||
616 | ptm_bfd_xmt_TO(bs, 0); | |
617 | ||
618 | return 0; | |
619 | } | |
620 | ||
621 | int bfd_echo_xmt_cb(struct thread *t) | |
622 | { | |
623 | struct bfd_session *bs = THREAD_ARG(t); | |
624 | ||
451eb5a2 RZ |
625 | if (bs->echo_xmt_TO > 0) |
626 | ptm_bfd_echo_xmt_TO(bs); | |
e9e2c950 RZ |
627 | |
628 | return 0; | |
629 | } | |
630 | ||
631 | /* Was ptm_bfd_detect_TO() */ | |
632 | int bfd_recvtimer_cb(struct thread *t) | |
633 | { | |
634 | struct bfd_session *bs = THREAD_ARG(t); | |
e9e2c950 RZ |
635 | |
636 | switch (bs->ses_state) { | |
637 | case PTM_BFD_INIT: | |
638 | case PTM_BFD_UP: | |
bc50bcc8 | 639 | ptm_bfd_sess_dn(bs, BD_CONTROL_EXPIRED); |
e9e2c950 RZ |
640 | bfd_recvtimer_update(bs); |
641 | break; | |
642 | ||
643 | default: | |
644 | /* Second detect time expiration, zero remote discr (section | |
645 | * 6.5.1) | |
646 | */ | |
647 | bs->discrs.remote_discr = 0; | |
648 | break; | |
649 | } | |
650 | ||
e9e2c950 RZ |
651 | return 0; |
652 | } | |
653 | ||
654 | /* Was ptm_bfd_echo_detect_TO() */ | |
655 | int bfd_echo_recvtimer_cb(struct thread *t) | |
656 | { | |
657 | struct bfd_session *bs = THREAD_ARG(t); | |
e9e2c950 RZ |
658 | |
659 | switch (bs->ses_state) { | |
660 | case PTM_BFD_INIT: | |
661 | case PTM_BFD_UP: | |
bc50bcc8 | 662 | ptm_bfd_sess_dn(bs, BD_ECHO_FAILED); |
e9e2c950 RZ |
663 | break; |
664 | } | |
665 | ||
e9e2c950 RZ |
666 | return 0; |
667 | } | |
668 | ||
014cab13 | 669 | struct bfd_session *bfd_session_new(void) |
e9e2c950 RZ |
670 | { |
671 | struct bfd_session *bs; | |
672 | ||
673 | bs = XCALLOC(MTYPE_BFDD_CONFIG, sizeof(*bs)); | |
e9e2c950 | 674 | |
ccc9ada8 RZ |
675 | /* Set peer session defaults. */ |
676 | bfd_profile_set_default(&bs->peer_profile); | |
677 | ||
f43b9368 | 678 | bs->timers.desired_min_tx = BFD_DEFDESIREDMINTX; |
e9e2c950 RZ |
679 | bs->timers.required_min_rx = BFD_DEFREQUIREDMINRX; |
680 | bs->timers.required_min_echo = BFD_DEF_REQ_MIN_ECHO; | |
681 | bs->detect_mult = BFD_DEFDETECTMULT; | |
682 | bs->mh_ttl = BFD_DEF_MHOP_TTL; | |
d245e522 | 683 | bs->ses_state = PTM_BFD_DOWN; |
e9e2c950 | 684 | |
b912b189 RZ |
685 | /* Initiate connection with slow timers. */ |
686 | bs_set_slow_timers(bs); | |
f43b9368 RZ |
687 | |
688 | /* Initiate remote settings as well. */ | |
689 | bs->remote_timers = bs->cur_timers; | |
690 | bs->remote_detect_mult = BFD_DEFDETECTMULT; | |
691 | ||
d245e522 | 692 | bs->sock = -1; |
e9e2c950 RZ |
693 | monotime(&bs->uptime); |
694 | bs->downtime = bs->uptime; | |
695 | ||
696 | return bs; | |
697 | } | |
698 | ||
699 | int bfd_session_update_label(struct bfd_session *bs, const char *nlabel) | |
700 | { | |
701 | /* New label treatment: | |
702 | * - Check if the label is taken; | |
703 | * - Try to allocate the memory for it and register; | |
704 | */ | |
705 | if (bs->pl == NULL) { | |
706 | if (pl_find(nlabel) != NULL) { | |
707 | /* Someone is already using it. */ | |
708 | return -1; | |
709 | } | |
710 | ||
08de92af | 711 | pl_new(nlabel, bs); |
e9e2c950 RZ |
712 | |
713 | return 0; | |
714 | } | |
715 | ||
716 | /* | |
717 | * Test label change consistency: | |
718 | * - Do nothing if it's the same label; | |
719 | * - Check if the future label is already taken; | |
720 | * - Change label; | |
721 | */ | |
722 | if (strcmp(nlabel, bs->pl->pl_label) == 0) | |
723 | return -1; | |
724 | if (pl_find(nlabel) != NULL) | |
725 | return -1; | |
726 | ||
727 | strlcpy(bs->pl->pl_label, nlabel, sizeof(bs->pl->pl_label)); | |
728 | return 0; | |
729 | } | |
730 | ||
731 | static void _bfd_session_update(struct bfd_session *bs, | |
732 | struct bfd_peer_cfg *bpc) | |
733 | { | |
ccc9ada8 | 734 | if (bpc->bpc_has_txinterval) { |
f43b9368 | 735 | bs->timers.desired_min_tx = bpc->bpc_txinterval * 1000; |
ccc9ada8 RZ |
736 | bs->peer_profile.min_tx = bs->timers.desired_min_tx; |
737 | } | |
e9e2c950 | 738 | |
ccc9ada8 | 739 | if (bpc->bpc_has_recvinterval) { |
e9e2c950 | 740 | bs->timers.required_min_rx = bpc->bpc_recvinterval * 1000; |
ccc9ada8 RZ |
741 | bs->peer_profile.min_rx = bs->timers.required_min_rx; |
742 | } | |
e9e2c950 | 743 | |
ccc9ada8 | 744 | if (bpc->bpc_has_detectmultiplier) { |
e9e2c950 | 745 | bs->detect_mult = bpc->bpc_detectmultiplier; |
ccc9ada8 RZ |
746 | bs->peer_profile.detection_multiplier = bs->detect_mult; |
747 | } | |
e9e2c950 | 748 | |
ccc9ada8 | 749 | if (bpc->bpc_has_echointerval) { |
e9e2c950 | 750 | bs->timers.required_min_echo = bpc->bpc_echointerval * 1000; |
ccc9ada8 RZ |
751 | bs->peer_profile.min_echo_rx = bs->timers.required_min_echo; |
752 | } | |
e9e2c950 RZ |
753 | |
754 | if (bpc->bpc_has_label) | |
755 | bfd_session_update_label(bs, bpc->bpc_label); | |
756 | ||
4d12e1f9 | 757 | if (bpc->bpc_cbit) |
b88113ef | 758 | SET_FLAG(bs->flags, BFD_SESS_FLAG_CBIT); |
4d12e1f9 | 759 | else |
b88113ef | 760 | UNSET_FLAG(bs->flags, BFD_SESS_FLAG_CBIT); |
4d12e1f9 | 761 | |
262e1d25 RZ |
762 | if (bpc->bpc_has_minimum_ttl) { |
763 | bs->mh_ttl = bpc->bpc_minimum_ttl; | |
764 | bs->peer_profile.minimum_ttl = bpc->bpc_minimum_ttl; | |
765 | } | |
766 | ||
ccc9ada8 | 767 | bs->peer_profile.echo_mode = bpc->bpc_echo; |
4d12e1f9 RZ |
768 | bfd_set_echo(bs, bpc->bpc_echo); |
769 | ||
770 | /* | |
771 | * Shutdown needs to be the last in order to avoid timers enable when | |
772 | * the session is disabled. | |
773 | */ | |
ccc9ada8 | 774 | bs->peer_profile.admin_shutdown = bpc->bpc_shutdown; |
1a2e2fff | 775 | bfd_set_passive_mode(bs, bpc->bpc_passive); |
4d12e1f9 | 776 | bfd_set_shutdown(bs, bpc->bpc_shutdown); |
18322efd RZ |
777 | |
778 | /* | |
779 | * Apply profile last: it also calls `bfd_set_shutdown`. | |
780 | * | |
781 | * There is no problem calling `shutdown` twice if the value doesn't | |
782 | * change or if it is overriden by peer specific configuration. | |
783 | */ | |
784 | if (bpc->bpc_has_profile) | |
785 | bfd_profile_apply(bpc->bpc_profile, bs); | |
e9e2c950 RZ |
786 | } |
787 | ||
788 | static int bfd_session_update(struct bfd_session *bs, struct bfd_peer_cfg *bpc) | |
789 | { | |
790 | /* User didn't want to update, return failure. */ | |
791 | if (bpc->bpc_createonly) | |
792 | return -1; | |
793 | ||
794 | _bfd_session_update(bs, bpc); | |
795 | ||
e9e2c950 RZ |
796 | control_notify_config(BCM_NOTIFY_CONFIG_UPDATE, bs); |
797 | ||
798 | return 0; | |
799 | } | |
800 | ||
014cab13 | 801 | void bfd_session_free(struct bfd_session *bs) |
e9e2c950 | 802 | { |
d245e522 | 803 | struct bfd_session_observer *bso; |
e9e2c950 | 804 | |
d245e522 | 805 | bfd_session_disable(bs); |
e9e2c950 | 806 | |
79b4a6fc RZ |
807 | bfd_key_delete(bs->key); |
808 | bfd_id_delete(bs->discrs.my_discr); | |
809 | ||
d245e522 RZ |
810 | /* Remove observer if any. */ |
811 | TAILQ_FOREACH(bso, &bglobal.bg_obslist, bso_entry) { | |
812 | if (bso->bso_bs != bs) | |
813 | continue; | |
814 | ||
815 | break; | |
816 | } | |
817 | if (bso != NULL) | |
818 | bs_observer_del(bso); | |
e9e2c950 RZ |
819 | |
820 | pl_free(bs->pl); | |
821 | ||
ccc9ada8 | 822 | XFREE(MTYPE_BFDD_PROFILE, bs->profile_name); |
e9e2c950 RZ |
823 | XFREE(MTYPE_BFDD_CONFIG, bs); |
824 | } | |
825 | ||
826 | struct bfd_session *ptm_bfd_sess_new(struct bfd_peer_cfg *bpc) | |
827 | { | |
828 | struct bfd_session *bfd, *l_bfd; | |
e9e2c950 RZ |
829 | |
830 | /* check to see if this needs a new session */ | |
831 | l_bfd = bs_peer_find(bpc); | |
832 | if (l_bfd) { | |
833 | /* Requesting a duplicated peer means update configuration. */ | |
834 | if (bfd_session_update(l_bfd, bpc) == 0) | |
835 | return l_bfd; | |
836 | else | |
837 | return NULL; | |
838 | } | |
839 | ||
d245e522 RZ |
840 | /* Get BFD session storage with its defaults. */ |
841 | bfd = bfd_session_new(); | |
e9e2c950 | 842 | |
d245e522 RZ |
843 | /* |
844 | * Store interface/VRF name in case we need to delay session | |
845 | * start. See `bfd_session_enable` for more information. | |
846 | */ | |
847 | if (bpc->bpc_has_localif) | |
79b4a6fc RZ |
848 | strlcpy(bfd->key.ifname, bpc->bpc_localif, |
849 | sizeof(bfd->key.ifname)); | |
e9e2c950 | 850 | |
d245e522 | 851 | if (bpc->bpc_has_vrfname) |
79b4a6fc RZ |
852 | strlcpy(bfd->key.vrfname, bpc->bpc_vrfname, |
853 | sizeof(bfd->key.vrfname)); | |
adc26455 RZ |
854 | else |
855 | strlcpy(bfd->key.vrfname, VRF_DEFAULT_NAME, | |
856 | sizeof(bfd->key.vrfname)); | |
e9e2c950 | 857 | |
d245e522 RZ |
858 | /* Copy remaining data. */ |
859 | if (bpc->bpc_ipv4 == false) | |
b88113ef | 860 | SET_FLAG(bfd->flags, BFD_SESS_FLAG_IPV6); |
e9e2c950 | 861 | |
79b4a6fc RZ |
862 | bfd->key.family = (bpc->bpc_ipv4) ? AF_INET : AF_INET6; |
863 | switch (bfd->key.family) { | |
864 | case AF_INET: | |
865 | memcpy(&bfd->key.peer, &bpc->bpc_peer.sa_sin.sin_addr, | |
866 | sizeof(bpc->bpc_peer.sa_sin.sin_addr)); | |
867 | memcpy(&bfd->key.local, &bpc->bpc_local.sa_sin.sin_addr, | |
868 | sizeof(bpc->bpc_local.sa_sin.sin_addr)); | |
869 | break; | |
870 | ||
871 | case AF_INET6: | |
872 | memcpy(&bfd->key.peer, &bpc->bpc_peer.sa_sin6.sin6_addr, | |
873 | sizeof(bpc->bpc_peer.sa_sin6.sin6_addr)); | |
874 | memcpy(&bfd->key.local, &bpc->bpc_local.sa_sin6.sin6_addr, | |
875 | sizeof(bpc->bpc_local.sa_sin6.sin6_addr)); | |
876 | break; | |
877 | ||
878 | default: | |
879 | assert(1); | |
880 | break; | |
d245e522 | 881 | } |
e9e2c950 | 882 | |
79b4a6fc | 883 | if (bpc->bpc_mhop) |
b88113ef | 884 | SET_FLAG(bfd->flags, BFD_SESS_FLAG_MH); |
79b4a6fc RZ |
885 | |
886 | bfd->key.mhop = bpc->bpc_mhop; | |
887 | ||
014cab13 RZ |
888 | if (bs_registrate(bfd) == NULL) |
889 | return NULL; | |
890 | ||
891 | /* Apply other configurations. */ | |
892 | _bfd_session_update(bfd, bpc); | |
893 | ||
894 | return bfd; | |
895 | } | |
896 | ||
897 | struct bfd_session *bs_registrate(struct bfd_session *bfd) | |
898 | { | |
79b4a6fc RZ |
899 | /* Registrate session into data structures. */ |
900 | bfd_key_insert(bfd); | |
901 | bfd->discrs.my_discr = ptm_bfd_gen_ID(); | |
902 | bfd_id_insert(bfd); | |
d245e522 RZ |
903 | |
904 | /* Try to enable session and schedule for packet receive/send. */ | |
905 | if (bfd_session_enable(bfd) == -1) { | |
906 | /* Unrecoverable failure, remove the session/peer. */ | |
907 | bfd_session_free(bfd); | |
908 | return NULL; | |
e9e2c950 RZ |
909 | } |
910 | ||
261e0ba9 RZ |
911 | /* Add observer if we have moving parts. */ |
912 | if (bfd->key.ifname[0] || bfd->key.vrfname[0] || bfd->sock == -1) | |
913 | bs_observer_add(bfd); | |
914 | ||
48da2c31 RZ |
915 | if (bglobal.debug_peer_event) |
916 | zlog_debug("session-new: %s", bs_to_string(bfd)); | |
e9e2c950 RZ |
917 | |
918 | control_notify_config(BCM_NOTIFY_CONFIG_ADD, bfd); | |
919 | ||
920 | return bfd; | |
921 | } | |
922 | ||
bc50bcc8 | 923 | int ptm_bfd_sess_del(struct bfd_peer_cfg *bpc) |
e9e2c950 RZ |
924 | { |
925 | struct bfd_session *bs; | |
926 | ||
927 | /* Find session and call free(). */ | |
928 | bs = bs_peer_find(bpc); | |
929 | if (bs == NULL) | |
930 | return -1; | |
931 | ||
932 | /* This pointer is being referenced, don't let it be deleted. */ | |
933 | if (bs->refcount > 0) { | |
6cde4b45 | 934 | zlog_err("session-delete: refcount failure: %" PRIu64" references", |
259b64eb | 935 | bs->refcount); |
e9e2c950 RZ |
936 | return -1; |
937 | } | |
938 | ||
48da2c31 RZ |
939 | if (bglobal.debug_peer_event) |
940 | zlog_debug("session-delete: %s", bs_to_string(bs)); | |
e9e2c950 RZ |
941 | |
942 | control_notify_config(BCM_NOTIFY_CONFIG_DELETE, bs); | |
943 | ||
944 | bfd_session_free(bs); | |
945 | ||
946 | return 0; | |
947 | } | |
948 | ||
d3f3a2c4 RZ |
949 | void bfd_set_polling(struct bfd_session *bs) |
950 | { | |
c0ef9a8a RZ |
951 | /* |
952 | * Start polling procedure: the only timers that require polling | |
953 | * to change value without losing connection are: | |
954 | * | |
955 | * - Desired minimum transmission interval; | |
956 | * - Required minimum receive interval; | |
957 | * | |
958 | * RFC 5880, Section 6.8.3. | |
959 | */ | |
d3f3a2c4 RZ |
960 | bs->polling = 1; |
961 | } | |
962 | ||
aef131af RZ |
963 | /* |
964 | * bs_<state>_handler() functions implement the BFD state machine | |
965 | * transition mechanism. `<state>` is the current session state and | |
966 | * the parameter `nstate` is the peer new state. | |
967 | */ | |
9f37770f RZ |
968 | static void bs_admin_down_handler(struct bfd_session *bs |
969 | __attribute__((__unused__)), | |
970 | int nstate __attribute__((__unused__))) | |
aef131af RZ |
971 | { |
972 | /* | |
973 | * We are administratively down, there is no state machine | |
974 | * handling. | |
975 | */ | |
976 | } | |
977 | ||
9f37770f | 978 | static void bs_down_handler(struct bfd_session *bs, int nstate) |
aef131af RZ |
979 | { |
980 | switch (nstate) { | |
981 | case PTM_BFD_ADM_DOWN: | |
982 | /* | |
983 | * Remote peer doesn't want to talk, so lets keep the | |
984 | * connection down. | |
985 | */ | |
986 | case PTM_BFD_UP: | |
987 | /* Peer can't be up yet, wait it go to 'init' or 'down'. */ | |
988 | break; | |
989 | ||
990 | case PTM_BFD_DOWN: | |
991 | /* | |
992 | * Remote peer agreed that the path is down, lets try to | |
993 | * bring it up. | |
994 | */ | |
995 | bs->ses_state = PTM_BFD_INIT; | |
1a2e2fff RZ |
996 | |
997 | /* Answer peer with INIT immediately in passive mode. */ | |
998 | if (CHECK_FLAG(bs->flags, BFD_SESS_FLAG_PASSIVE)) | |
999 | ptm_bfd_snd(bs, 0); | |
aef131af RZ |
1000 | break; |
1001 | ||
1002 | case PTM_BFD_INIT: | |
1003 | /* | |
1004 | * Remote peer told us his path is up, lets turn | |
1005 | * activate the session. | |
1006 | */ | |
bc50bcc8 | 1007 | ptm_bfd_sess_up(bs); |
aef131af RZ |
1008 | break; |
1009 | ||
1010 | default: | |
48da2c31 RZ |
1011 | if (bglobal.debug_peer_event) |
1012 | zlog_debug("state-change: unhandled neighbor state: %d", | |
1013 | nstate); | |
aef131af RZ |
1014 | break; |
1015 | } | |
1016 | } | |
1017 | ||
9f37770f | 1018 | static void bs_init_handler(struct bfd_session *bs, int nstate) |
aef131af RZ |
1019 | { |
1020 | switch (nstate) { | |
1021 | case PTM_BFD_ADM_DOWN: | |
1022 | /* | |
1023 | * Remote peer doesn't want to talk, so lets make the | |
1024 | * connection down. | |
1025 | */ | |
1026 | bs->ses_state = PTM_BFD_DOWN; | |
1027 | break; | |
1028 | ||
1029 | case PTM_BFD_DOWN: | |
1030 | /* Remote peer hasn't moved to first stage yet. */ | |
1031 | break; | |
1032 | ||
1033 | case PTM_BFD_INIT: | |
1034 | case PTM_BFD_UP: | |
1035 | /* We agreed on the settings and the path is up. */ | |
bc50bcc8 | 1036 | ptm_bfd_sess_up(bs); |
aef131af RZ |
1037 | break; |
1038 | ||
1039 | default: | |
48da2c31 RZ |
1040 | if (bglobal.debug_peer_event) |
1041 | zlog_debug("state-change: unhandled neighbor state: %d", | |
1042 | nstate); | |
aef131af RZ |
1043 | break; |
1044 | } | |
1045 | } | |
1046 | ||
7555dc61 S |
1047 | static void bs_neighbour_admin_down_handler(struct bfd_session *bfd, |
1048 | uint8_t diag) | |
1049 | { | |
1050 | int old_state = bfd->ses_state; | |
1051 | ||
1052 | bfd->local_diag = diag; | |
1053 | bfd->discrs.remote_discr = 0; | |
1054 | bfd->ses_state = PTM_BFD_DOWN; | |
1055 | bfd->polling = 0; | |
1056 | bfd->demand_mode = 0; | |
1057 | monotime(&bfd->downtime); | |
1058 | ||
1059 | /* Slow down the control packets, the connection is down. */ | |
1060 | bs_set_slow_timers(bfd); | |
1061 | ||
1062 | /* only signal clients when going from up->down state */ | |
1063 | if (old_state == PTM_BFD_UP) | |
1064 | control_notify(bfd, PTM_BFD_ADM_DOWN); | |
1065 | ||
1066 | /* Stop echo packet transmission if they are active */ | |
b88113ef | 1067 | if (CHECK_FLAG(bfd->flags, BFD_SESS_FLAG_ECHO_ACTIVE)) |
7555dc61 S |
1068 | ptm_bfd_echo_stop(bfd); |
1069 | ||
1070 | if (old_state != bfd->ses_state) { | |
1071 | bfd->stats.session_down++; | |
48da2c31 RZ |
1072 | if (bglobal.debug_peer_event) |
1073 | zlog_debug("state-change: [%s] %s -> %s reason:%s", | |
1074 | bs_to_string(bfd), state_list[old_state].str, | |
1075 | state_list[bfd->ses_state].str, | |
1076 | get_diag_str(bfd->local_diag)); | |
7555dc61 S |
1077 | } |
1078 | } | |
1079 | ||
9f37770f | 1080 | static void bs_up_handler(struct bfd_session *bs, int nstate) |
aef131af RZ |
1081 | { |
1082 | switch (nstate) { | |
1083 | case PTM_BFD_ADM_DOWN: | |
7555dc61 S |
1084 | bs_neighbour_admin_down_handler(bs, BD_ADMIN_DOWN); |
1085 | break; | |
1086 | ||
aef131af RZ |
1087 | case PTM_BFD_DOWN: |
1088 | /* Peer lost or asked to shutdown connection. */ | |
bc50bcc8 | 1089 | ptm_bfd_sess_dn(bs, BD_NEIGHBOR_DOWN); |
aef131af RZ |
1090 | break; |
1091 | ||
1092 | case PTM_BFD_INIT: | |
1093 | case PTM_BFD_UP: | |
1094 | /* Path is up and working. */ | |
1095 | break; | |
1096 | ||
1097 | default: | |
48da2c31 RZ |
1098 | if (bglobal.debug_peer_event) |
1099 | zlog_debug("state-change: unhandled neighbor state: %d", | |
1100 | nstate); | |
aef131af RZ |
1101 | break; |
1102 | } | |
1103 | } | |
1104 | ||
1105 | void bs_state_handler(struct bfd_session *bs, int nstate) | |
1106 | { | |
1107 | switch (bs->ses_state) { | |
1108 | case PTM_BFD_ADM_DOWN: | |
1109 | bs_admin_down_handler(bs, nstate); | |
1110 | break; | |
1111 | case PTM_BFD_DOWN: | |
1112 | bs_down_handler(bs, nstate); | |
1113 | break; | |
1114 | case PTM_BFD_INIT: | |
1115 | bs_init_handler(bs, nstate); | |
1116 | break; | |
1117 | case PTM_BFD_UP: | |
1118 | bs_up_handler(bs, nstate); | |
1119 | break; | |
1120 | ||
1121 | default: | |
48da2c31 RZ |
1122 | if (bglobal.debug_peer_event) |
1123 | zlog_debug("state-change: [%s] is in invalid state: %d", | |
1124 | bs_to_string(bs), nstate); | |
aef131af RZ |
1125 | break; |
1126 | } | |
1127 | } | |
1128 | ||
c0ef9a8a RZ |
1129 | /* |
1130 | * Handles echo timer manipulation after updating timer. | |
1131 | */ | |
1132 | void bs_echo_timer_handler(struct bfd_session *bs) | |
1133 | { | |
1134 | uint32_t old_timer; | |
1135 | ||
1136 | /* | |
1137 | * Before doing any echo handling, check if it is possible to | |
1138 | * use it. | |
1139 | * | |
1140 | * - Check for `echo-mode` configuration. | |
1141 | * - Check that we are not using multi hop (RFC 5883, | |
1142 | * Section 3). | |
1143 | * - Check that we are already at the up state. | |
1144 | */ | |
b88113ef RZ |
1145 | if (CHECK_FLAG(bs->flags, BFD_SESS_FLAG_ECHO) == 0 |
1146 | || CHECK_FLAG(bs->flags, BFD_SESS_FLAG_MH) | |
c0ef9a8a RZ |
1147 | || bs->ses_state != PTM_BFD_UP) |
1148 | return; | |
1149 | ||
1150 | /* Remote peer asked to stop echo. */ | |
1151 | if (bs->remote_timers.required_min_echo == 0) { | |
b88113ef | 1152 | if (CHECK_FLAG(bs->flags, BFD_SESS_FLAG_ECHO_ACTIVE)) |
8bd859f6 | 1153 | ptm_bfd_echo_stop(bs); |
c0ef9a8a RZ |
1154 | |
1155 | return; | |
1156 | } | |
1157 | ||
1158 | /* | |
1159 | * Calculate the echo transmission timer: we must not send | |
1160 | * echo packets faster than the minimum required time | |
1161 | * announced by the remote system. | |
1162 | * | |
1163 | * RFC 5880, Section 6.8.9. | |
1164 | */ | |
1165 | old_timer = bs->echo_xmt_TO; | |
1166 | if (bs->remote_timers.required_min_echo > bs->timers.required_min_echo) | |
1167 | bs->echo_xmt_TO = bs->remote_timers.required_min_echo; | |
1168 | else | |
1169 | bs->echo_xmt_TO = bs->timers.required_min_echo; | |
1170 | ||
b88113ef | 1171 | if (CHECK_FLAG(bs->flags, BFD_SESS_FLAG_ECHO_ACTIVE) == 0 |
c0ef9a8a RZ |
1172 | || old_timer != bs->echo_xmt_TO) |
1173 | ptm_bfd_echo_start(bs); | |
1174 | } | |
1175 | ||
1176 | /* | |
1177 | * RFC 5880 Section 6.5. | |
1178 | * | |
1179 | * When a BFD control packet with the final bit is received, we must | |
1180 | * update the session parameters. | |
1181 | */ | |
1182 | void bs_final_handler(struct bfd_session *bs) | |
1183 | { | |
1184 | /* Start using our new timers. */ | |
f43b9368 RZ |
1185 | bs->cur_timers.desired_min_tx = bs->timers.desired_min_tx; |
1186 | bs->cur_timers.required_min_rx = bs->timers.required_min_rx; | |
c0ef9a8a RZ |
1187 | |
1188 | /* | |
1189 | * TODO: demand mode. See RFC 5880 Section 6.1. | |
1190 | * | |
1191 | * When using demand mode we must disable the detection timer | |
1192 | * for lost control packets. | |
1193 | */ | |
1194 | if (bs->demand_mode) { | |
1195 | /* Notify watchers about changed timers. */ | |
1196 | control_notify_config(BCM_NOTIFY_CONFIG_UPDATE, bs); | |
1197 | return; | |
1198 | } | |
1199 | ||
1200 | /* | |
4caf6388 | 1201 | * Calculate transmission time based on new timers. |
c0ef9a8a RZ |
1202 | * |
1203 | * Transmission calculation: | |
4caf6388 RZ |
1204 | * Unless specified by exceptions at the end of Section 6.8.7, the |
1205 | * transmission time will be determined by the system with the | |
1206 | * slowest rate. | |
c0ef9a8a | 1207 | * |
4caf6388 | 1208 | * RFC 5880, Section 6.8.7. |
c0ef9a8a RZ |
1209 | */ |
1210 | if (bs->timers.desired_min_tx > bs->remote_timers.required_min_rx) | |
c0ef9a8a | 1211 | bs->xmt_TO = bs->timers.desired_min_tx; |
4caf6388 RZ |
1212 | else |
1213 | bs->xmt_TO = bs->remote_timers.required_min_rx; | |
c0ef9a8a RZ |
1214 | |
1215 | /* Apply new transmission timer immediately. */ | |
1216 | ptm_bfd_start_xmt_timer(bs, false); | |
1217 | ||
1218 | /* | |
1219 | * Detection timeout calculation: | |
1220 | * The minimum detection timeout is the remote detection | |
1221 | * multipler (number of packets to be missed) times the agreed | |
1222 | * transmission interval. | |
1223 | * | |
1224 | * RFC 5880, Section 6.8.4. | |
1225 | * | |
1226 | * TODO: support sending/counting more packets inside detection | |
1227 | * timeout. | |
1228 | */ | |
1229 | if (bs->remote_timers.required_min_rx > bs->timers.desired_min_tx) | |
1230 | bs->detect_TO = bs->remote_detect_mult | |
1231 | * bs->remote_timers.required_min_rx; | |
1232 | else | |
1233 | bs->detect_TO = bs->remote_detect_mult | |
1234 | * bs->timers.desired_min_tx; | |
1235 | ||
1236 | /* Apply new receive timer immediately. */ | |
1237 | bfd_recvtimer_update(bs); | |
1238 | ||
1239 | /* Notify watchers about changed timers. */ | |
1240 | control_notify_config(BCM_NOTIFY_CONFIG_UPDATE, bs); | |
1241 | } | |
1242 | ||
b912b189 RZ |
1243 | void bs_set_slow_timers(struct bfd_session *bs) |
1244 | { | |
1245 | /* | |
1246 | * BFD connection must use slow timers before going up or after | |
1247 | * losing connectivity to avoid wasting bandwidth. | |
1248 | * | |
1249 | * RFC 5880, Section 6.8.3. | |
1250 | */ | |
1251 | bs->cur_timers.desired_min_tx = BFD_DEF_SLOWTX; | |
1252 | bs->cur_timers.required_min_rx = BFD_DEF_SLOWTX; | |
1253 | bs->cur_timers.required_min_echo = 0; | |
1254 | ||
1255 | /* Set the appropriated timeouts for slow connection. */ | |
1256 | bs->detect_TO = (BFD_DEFDETECTMULT * BFD_DEF_SLOWTX); | |
1257 | bs->xmt_TO = BFD_DEF_SLOWTX; | |
1258 | } | |
e9e2c950 | 1259 | |
4d12e1f9 RZ |
1260 | void bfd_set_echo(struct bfd_session *bs, bool echo) |
1261 | { | |
1262 | if (echo) { | |
1263 | /* Check if echo mode is already active. */ | |
1264 | if (CHECK_FLAG(bs->flags, BFD_SESS_FLAG_ECHO)) | |
1265 | return; | |
1266 | ||
1267 | SET_FLAG(bs->flags, BFD_SESS_FLAG_ECHO); | |
1268 | ||
1269 | /* Activate/update echo receive timeout timer. */ | |
1270 | bs_echo_timer_handler(bs); | |
1271 | } else { | |
1272 | /* Check if echo mode is already disabled. */ | |
1273 | if (!CHECK_FLAG(bs->flags, BFD_SESS_FLAG_ECHO)) | |
1274 | return; | |
1275 | ||
1276 | UNSET_FLAG(bs->flags, BFD_SESS_FLAG_ECHO); | |
1277 | ptm_bfd_echo_stop(bs); | |
1278 | } | |
1279 | } | |
1280 | ||
1281 | void bfd_set_shutdown(struct bfd_session *bs, bool shutdown) | |
1282 | { | |
ccc9ada8 RZ |
1283 | bool is_shutdown; |
1284 | ||
1285 | /* | |
1286 | * Special case: we are batching changes and the previous state was | |
1287 | * not shutdown. Instead of potentially disconnect a running peer, | |
1288 | * we'll get the current status to validate we were really down. | |
1289 | */ | |
1290 | if (bs->ses_state == PTM_BFD_UP) | |
1291 | is_shutdown = false; | |
1292 | else | |
1293 | is_shutdown = CHECK_FLAG(bs->flags, BFD_SESS_FLAG_SHUTDOWN); | |
1294 | ||
4d12e1f9 RZ |
1295 | if (shutdown) { |
1296 | /* Already shutdown. */ | |
ccc9ada8 | 1297 | if (is_shutdown) |
4d12e1f9 RZ |
1298 | return; |
1299 | ||
1300 | SET_FLAG(bs->flags, BFD_SESS_FLAG_SHUTDOWN); | |
1301 | ||
1302 | /* Disable all events. */ | |
1303 | bfd_recvtimer_delete(bs); | |
1304 | bfd_echo_recvtimer_delete(bs); | |
1305 | bfd_xmttimer_delete(bs); | |
1306 | bfd_echo_xmttimer_delete(bs); | |
1307 | ||
1308 | /* Change and notify state change. */ | |
1309 | bs->ses_state = PTM_BFD_ADM_DOWN; | |
1310 | control_notify(bs, bs->ses_state); | |
1311 | ||
1312 | /* Don't try to send packets with a disabled session. */ | |
1313 | if (bs->sock != -1) | |
1314 | ptm_bfd_snd(bs, 0); | |
1315 | } else { | |
1316 | /* Already working. */ | |
ccc9ada8 | 1317 | if (!is_shutdown) |
4d12e1f9 RZ |
1318 | return; |
1319 | ||
1320 | UNSET_FLAG(bs->flags, BFD_SESS_FLAG_SHUTDOWN); | |
1321 | ||
1322 | /* Change and notify state change. */ | |
1323 | bs->ses_state = PTM_BFD_DOWN; | |
1324 | control_notify(bs, bs->ses_state); | |
1325 | ||
1a2e2fff RZ |
1326 | /* Enable timers if non passive, otherwise stop them. */ |
1327 | if (CHECK_FLAG(bs->flags, BFD_SESS_FLAG_PASSIVE)) { | |
1328 | bfd_recvtimer_delete(bs); | |
1329 | bfd_xmttimer_delete(bs); | |
1330 | } else { | |
1331 | bfd_recvtimer_update(bs); | |
1332 | bfd_xmttimer_update(bs, bs->xmt_TO); | |
1333 | } | |
1334 | } | |
1335 | } | |
1336 | ||
1337 | void bfd_set_passive_mode(struct bfd_session *bs, bool passive) | |
1338 | { | |
1339 | if (passive) { | |
1340 | SET_FLAG(bs->flags, BFD_SESS_FLAG_PASSIVE); | |
1341 | ||
1342 | /* Session is already up and running, nothing to do now. */ | |
1343 | if (bs->ses_state != PTM_BFD_DOWN) | |
1344 | return; | |
1345 | ||
1346 | /* Lets disable the timers since we are now passive. */ | |
1347 | bfd_recvtimer_delete(bs); | |
1348 | bfd_xmttimer_delete(bs); | |
1349 | } else { | |
1350 | UNSET_FLAG(bs->flags, BFD_SESS_FLAG_PASSIVE); | |
1351 | ||
1352 | /* Session is already up and running, nothing to do now. */ | |
1353 | if (bs->ses_state != PTM_BFD_DOWN) | |
1354 | return; | |
1355 | ||
1356 | /* Session is down, let it attempt to start the connection. */ | |
4d12e1f9 | 1357 | bfd_xmttimer_update(bs, bs->xmt_TO); |
1a2e2fff | 1358 | bfd_recvtimer_update(bs); |
4d12e1f9 RZ |
1359 | } |
1360 | } | |
1361 | ||
e9e2c950 RZ |
1362 | /* |
1363 | * Helper functions. | |
1364 | */ | |
1365 | static const char *get_diag_str(int diag) | |
1366 | { | |
1367 | for (int i = 0; diag_list[i].str; i++) { | |
1368 | if (diag_list[i].type == diag) | |
1369 | return diag_list[i].str; | |
1370 | } | |
1371 | return "N/A"; | |
1372 | } | |
1373 | ||
6e10bd97 | 1374 | const char *satostr(const struct sockaddr_any *sa) |
e9e2c950 RZ |
1375 | { |
1376 | #define INETSTR_BUFCOUNT 8 | |
1377 | static char buf[INETSTR_BUFCOUNT][INET6_ADDRSTRLEN]; | |
1378 | static int bufidx; | |
6e10bd97 RZ |
1379 | const struct sockaddr_in *sin = &sa->sa_sin; |
1380 | const struct sockaddr_in6 *sin6 = &sa->sa_sin6; | |
e9e2c950 RZ |
1381 | |
1382 | bufidx += (bufidx + 1) % INETSTR_BUFCOUNT; | |
1383 | buf[bufidx][0] = 0; | |
1384 | ||
1385 | switch (sin->sin_family) { | |
1386 | case AF_INET: | |
1387 | inet_ntop(AF_INET, &sin->sin_addr, buf[bufidx], | |
1388 | sizeof(buf[bufidx])); | |
1389 | break; | |
1390 | case AF_INET6: | |
1391 | inet_ntop(AF_INET6, &sin6->sin6_addr, buf[bufidx], | |
1392 | sizeof(buf[bufidx])); | |
1393 | break; | |
1394 | ||
1395 | default: | |
1396 | strlcpy(buf[bufidx], "unknown", sizeof(buf[bufidx])); | |
1397 | break; | |
1398 | } | |
1399 | ||
1400 | return buf[bufidx]; | |
1401 | } | |
1402 | ||
1403 | const char *diag2str(uint8_t diag) | |
1404 | { | |
1405 | switch (diag) { | |
1406 | case 0: | |
1407 | return "ok"; | |
1408 | case 1: | |
1409 | return "control detection time expired"; | |
1410 | case 2: | |
1411 | return "echo function failed"; | |
1412 | case 3: | |
1413 | return "neighbor signaled session down"; | |
1414 | case 4: | |
1415 | return "forwarding plane reset"; | |
1416 | case 5: | |
1417 | return "path down"; | |
1418 | case 6: | |
1419 | return "concatenated path down"; | |
1420 | case 7: | |
1421 | return "administratively down"; | |
1422 | case 8: | |
1423 | return "reverse concatenated path down"; | |
1424 | default: | |
1425 | return "unknown"; | |
1426 | } | |
1427 | } | |
1428 | ||
1429 | int strtosa(const char *addr, struct sockaddr_any *sa) | |
1430 | { | |
1431 | memset(sa, 0, sizeof(*sa)); | |
1432 | ||
1433 | if (inet_pton(AF_INET, addr, &sa->sa_sin.sin_addr) == 1) { | |
1434 | sa->sa_sin.sin_family = AF_INET; | |
1435 | #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN | |
1436 | sa->sa_sin.sin_len = sizeof(sa->sa_sin); | |
1437 | #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */ | |
1438 | return 0; | |
1439 | } | |
1440 | ||
1441 | if (inet_pton(AF_INET6, addr, &sa->sa_sin6.sin6_addr) == 1) { | |
1442 | sa->sa_sin6.sin6_family = AF_INET6; | |
1443 | #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN | |
1444 | sa->sa_sin6.sin6_len = sizeof(sa->sa_sin6); | |
1445 | #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */ | |
1446 | return 0; | |
1447 | } | |
1448 | ||
1449 | return -1; | |
1450 | } | |
1451 | ||
1452 | void integer2timestr(uint64_t time, char *buf, size_t buflen) | |
1453 | { | |
1454 | unsigned int year, month, day, hour, minute, second; | |
1455 | int rv; | |
1456 | ||
1457 | #define MINUTES (60) | |
23586b05 DS |
1458 | #define HOURS (60 * MINUTES) |
1459 | #define DAYS (24 * HOURS) | |
1460 | #define MONTHS (30 * DAYS) | |
1461 | #define YEARS (12 * MONTHS) | |
e9e2c950 RZ |
1462 | if (time >= YEARS) { |
1463 | year = time / YEARS; | |
1464 | time -= year * YEARS; | |
1465 | ||
1466 | rv = snprintf(buf, buflen, "%u year(s), ", year); | |
1467 | buf += rv; | |
1468 | buflen -= rv; | |
1469 | } | |
1470 | if (time >= MONTHS) { | |
1471 | month = time / MONTHS; | |
1472 | time -= month * MONTHS; | |
1473 | ||
1474 | rv = snprintf(buf, buflen, "%u month(s), ", month); | |
1475 | buf += rv; | |
1476 | buflen -= rv; | |
1477 | } | |
1478 | if (time >= DAYS) { | |
1479 | day = time / DAYS; | |
1480 | time -= day * DAYS; | |
1481 | ||
1482 | rv = snprintf(buf, buflen, "%u day(s), ", day); | |
1483 | buf += rv; | |
1484 | buflen -= rv; | |
1485 | } | |
1486 | if (time >= HOURS) { | |
1487 | hour = time / HOURS; | |
1488 | time -= hour * HOURS; | |
1489 | ||
1490 | rv = snprintf(buf, buflen, "%u hour(s), ", hour); | |
1491 | buf += rv; | |
1492 | buflen -= rv; | |
1493 | } | |
1494 | if (time >= MINUTES) { | |
1495 | minute = time / MINUTES; | |
1496 | time -= minute * MINUTES; | |
1497 | ||
1498 | rv = snprintf(buf, buflen, "%u minute(s), ", minute); | |
1499 | buf += rv; | |
1500 | buflen -= rv; | |
1501 | } | |
1502 | second = time % MINUTES; | |
1503 | snprintf(buf, buflen, "%u second(s)", second); | |
1504 | } | |
1505 | ||
79b4a6fc | 1506 | const char *bs_to_string(const struct bfd_session *bs) |
03e7f088 RZ |
1507 | { |
1508 | static char buf[256]; | |
79b4a6fc | 1509 | char addr_buf[INET6_ADDRSTRLEN]; |
03e7f088 | 1510 | int pos; |
b88113ef | 1511 | bool is_mhop = CHECK_FLAG(bs->flags, BFD_SESS_FLAG_MH); |
03e7f088 RZ |
1512 | |
1513 | pos = snprintf(buf, sizeof(buf), "mhop:%s", is_mhop ? "yes" : "no"); | |
79b4a6fc RZ |
1514 | pos += snprintf(buf + pos, sizeof(buf) - pos, " peer:%s", |
1515 | inet_ntop(bs->key.family, &bs->key.peer, addr_buf, | |
1516 | sizeof(addr_buf))); | |
1517 | pos += snprintf(buf + pos, sizeof(buf) - pos, " local:%s", | |
1518 | inet_ntop(bs->key.family, &bs->key.local, addr_buf, | |
1519 | sizeof(addr_buf))); | |
1520 | if (bs->key.vrfname[0]) | |
1521 | pos += snprintf(buf + pos, sizeof(buf) - pos, " vrf:%s", | |
1522 | bs->key.vrfname); | |
1523 | if (bs->key.ifname[0]) | |
1524 | pos += snprintf(buf + pos, sizeof(buf) - pos, " ifname:%s", | |
1525 | bs->key.ifname); | |
3cef9b7f DS |
1526 | |
1527 | (void)pos; | |
1528 | ||
03e7f088 RZ |
1529 | return buf; |
1530 | } | |
1531 | ||
d245e522 RZ |
1532 | int bs_observer_add(struct bfd_session *bs) |
1533 | { | |
1534 | struct bfd_session_observer *bso; | |
1535 | ||
ed74032b | 1536 | bso = XCALLOC(MTYPE_BFDD_SESSION_OBSERVER, sizeof(*bso)); |
d245e522 | 1537 | bso->bso_bs = bs; |
ced291de RZ |
1538 | bso->bso_addr.family = bs->key.family; |
1539 | memcpy(&bso->bso_addr.u.prefix, &bs->key.local, | |
1540 | sizeof(bs->key.local)); | |
261e0ba9 | 1541 | |
d245e522 RZ |
1542 | TAILQ_INSERT_TAIL(&bglobal.bg_obslist, bso, bso_entry); |
1543 | ||
1544 | return 0; | |
1545 | } | |
1546 | ||
1547 | void bs_observer_del(struct bfd_session_observer *bso) | |
1548 | { | |
1549 | TAILQ_REMOVE(&bglobal.bg_obslist, bso, bso_entry); | |
1550 | XFREE(MTYPE_BFDD_SESSION_OBSERVER, bso); | |
1551 | } | |
1552 | ||
79b4a6fc RZ |
1553 | void bs_to_bpc(struct bfd_session *bs, struct bfd_peer_cfg *bpc) |
1554 | { | |
1555 | memset(bpc, 0, sizeof(*bpc)); | |
1556 | ||
1557 | bpc->bpc_ipv4 = (bs->key.family == AF_INET); | |
1558 | bpc->bpc_mhop = bs->key.mhop; | |
1559 | ||
1560 | switch (bs->key.family) { | |
1561 | case AF_INET: | |
1562 | bpc->bpc_peer.sa_sin.sin_family = AF_INET; | |
1563 | memcpy(&bpc->bpc_peer.sa_sin.sin_addr, &bs->key.peer, | |
1564 | sizeof(bpc->bpc_peer.sa_sin.sin_addr)); | |
1565 | ||
1566 | if (memcmp(&bs->key.local, &zero_addr, sizeof(bs->key.local))) { | |
1567 | bpc->bpc_local.sa_sin.sin_family = AF_INET6; | |
5ff7d1be | 1568 | memcpy(&bpc->bpc_local.sa_sin.sin_addr, &bs->key.local, |
79b4a6fc RZ |
1569 | sizeof(bpc->bpc_local.sa_sin.sin_addr)); |
1570 | } | |
1571 | break; | |
1572 | ||
1573 | case AF_INET6: | |
1574 | bpc->bpc_peer.sa_sin.sin_family = AF_INET6; | |
1575 | memcpy(&bpc->bpc_peer.sa_sin6.sin6_addr, &bs->key.peer, | |
1576 | sizeof(bpc->bpc_peer.sa_sin6.sin6_addr)); | |
1577 | ||
1578 | bpc->bpc_local.sa_sin6.sin6_family = AF_INET6; | |
5ff7d1be | 1579 | memcpy(&bpc->bpc_local.sa_sin6.sin6_addr, &bs->key.local, |
79b4a6fc RZ |
1580 | sizeof(bpc->bpc_local.sa_sin6.sin6_addr)); |
1581 | break; | |
1582 | } | |
1583 | ||
1584 | if (bs->key.ifname[0]) { | |
1585 | bpc->bpc_has_localif = true; | |
1586 | strlcpy(bpc->bpc_localif, bs->key.ifname, | |
1587 | sizeof(bpc->bpc_localif)); | |
1588 | } | |
1589 | ||
1590 | if (bs->key.vrfname[0]) { | |
1591 | bpc->bpc_has_vrfname = true; | |
1592 | strlcpy(bpc->bpc_vrfname, bs->key.vrfname, | |
1593 | sizeof(bpc->bpc_vrfname)); | |
1594 | } | |
1595 | } | |
1596 | ||
e9e2c950 RZ |
1597 | |
1598 | /* | |
1599 | * BFD hash data structures to find sessions. | |
1600 | */ | |
1601 | static struct hash *bfd_id_hash; | |
79b4a6fc | 1602 | static struct hash *bfd_key_hash; |
e9e2c950 | 1603 | |
d8b87afe QY |
1604 | static unsigned int bfd_id_hash_do(const void *p); |
1605 | static unsigned int bfd_key_hash_do(const void *p); | |
e9e2c950 | 1606 | |
e3b78da8 | 1607 | static void _bfd_free(struct hash_bucket *hb, |
e9e2c950 | 1608 | void *arg __attribute__((__unused__))); |
e9e2c950 RZ |
1609 | |
1610 | /* BFD hash for our discriminator. */ | |
d8b87afe | 1611 | static unsigned int bfd_id_hash_do(const void *p) |
e9e2c950 | 1612 | { |
d8b87afe | 1613 | const struct bfd_session *bs = p; |
e9e2c950 RZ |
1614 | |
1615 | return jhash_1word(bs->discrs.my_discr, 0); | |
1616 | } | |
1617 | ||
74df8d6d | 1618 | static bool bfd_id_hash_cmp(const void *n1, const void *n2) |
e9e2c950 RZ |
1619 | { |
1620 | const struct bfd_session *bs1 = n1, *bs2 = n2; | |
1621 | ||
1622 | return bs1->discrs.my_discr == bs2->discrs.my_discr; | |
1623 | } | |
1624 | ||
1625 | /* BFD hash for single hop. */ | |
d8b87afe | 1626 | static unsigned int bfd_key_hash_do(const void *p) |
e9e2c950 | 1627 | { |
d8b87afe | 1628 | const struct bfd_session *bs = p; |
e9e2c950 | 1629 | |
79b4a6fc | 1630 | return jhash(&bs->key, sizeof(bs->key), 0); |
e9e2c950 RZ |
1631 | } |
1632 | ||
79b4a6fc | 1633 | static bool bfd_key_hash_cmp(const void *n1, const void *n2) |
e9e2c950 RZ |
1634 | { |
1635 | const struct bfd_session *bs1 = n1, *bs2 = n2; | |
1636 | ||
79b4a6fc | 1637 | return memcmp(&bs1->key, &bs2->key, sizeof(bs1->key)) == 0; |
e9e2c950 RZ |
1638 | } |
1639 | ||
e9e2c950 | 1640 | |
e9e2c950 RZ |
1641 | /* |
1642 | * Hash public interface / exported functions. | |
1643 | */ | |
1644 | ||
1645 | /* Lookup functions. */ | |
1646 | struct bfd_session *bfd_id_lookup(uint32_t id) | |
1647 | { | |
1648 | struct bfd_session bs; | |
1649 | ||
1650 | bs.discrs.my_discr = id; | |
1651 | ||
1652 | return hash_lookup(bfd_id_hash, &bs); | |
1653 | } | |
1654 | ||
5ef92a2b PG |
1655 | struct bfd_key_walk_partial_lookup { |
1656 | struct bfd_session *given; | |
1657 | struct bfd_session *result; | |
1658 | }; | |
1659 | ||
1660 | /* ignore some parameters */ | |
307fc425 RZ |
1661 | static int bfd_key_lookup_ignore_partial_walker(struct hash_bucket *b, |
1662 | void *data) | |
5ef92a2b | 1663 | { |
307fc425 | 1664 | struct bfd_key_walk_partial_lookup *ctx = |
5ef92a2b PG |
1665 | (struct bfd_key_walk_partial_lookup *)data; |
1666 | struct bfd_session *given = ctx->given; | |
1667 | struct bfd_session *parsed = b->data; | |
1668 | ||
1669 | if (given->key.family != parsed->key.family) | |
1670 | return HASHWALK_CONTINUE; | |
1671 | if (given->key.mhop != parsed->key.mhop) | |
1672 | return HASHWALK_CONTINUE; | |
307fc425 RZ |
1673 | if (memcmp(&given->key.peer, &parsed->key.peer, |
1674 | sizeof(struct in6_addr))) | |
5ef92a2b PG |
1675 | return HASHWALK_CONTINUE; |
1676 | if (memcmp(given->key.vrfname, parsed->key.vrfname, MAXNAMELEN)) | |
1677 | return HASHWALK_CONTINUE; | |
1678 | ctx->result = parsed; | |
1679 | /* ignore localaddr or interface */ | |
1680 | return HASHWALK_ABORT; | |
1681 | } | |
1682 | ||
79b4a6fc | 1683 | struct bfd_session *bfd_key_lookup(struct bfd_key key) |
e9e2c950 RZ |
1684 | { |
1685 | struct bfd_session bs, *bsp; | |
5ef92a2b PG |
1686 | struct bfd_key_walk_partial_lookup ctx; |
1687 | char peer_buf[INET6_ADDRSTRLEN]; | |
e9e2c950 | 1688 | |
79b4a6fc RZ |
1689 | bs.key = key; |
1690 | bsp = hash_lookup(bfd_key_hash, &bs); | |
5ef92a2b PG |
1691 | if (bsp) |
1692 | return bsp; | |
e9e2c950 | 1693 | |
5ef92a2b PG |
1694 | inet_ntop(bs.key.family, &bs.key.peer, peer_buf, |
1695 | sizeof(peer_buf)); | |
79b4a6fc | 1696 | /* Handle cases where local-address is optional. */ |
5ef92a2b | 1697 | if (bs.key.family == AF_INET) { |
79b4a6fc RZ |
1698 | memset(&bs.key.local, 0, sizeof(bs.key.local)); |
1699 | bsp = hash_lookup(bfd_key_hash, &bs); | |
5ef92a2b | 1700 | if (bsp) { |
48da2c31 RZ |
1701 | if (bglobal.debug_peer_event) { |
1702 | char addr_buf[INET6_ADDRSTRLEN]; | |
1703 | inet_ntop(bs.key.family, &key.local, addr_buf, | |
1704 | sizeof(addr_buf)); | |
1705 | zlog_debug( | |
1706 | " peer %s found, but loc-addr %s ignored", | |
1707 | peer_buf, addr_buf); | |
1708 | } | |
5ef92a2b PG |
1709 | return bsp; |
1710 | } | |
e9e2c950 RZ |
1711 | } |
1712 | ||
79b4a6fc | 1713 | bs.key = key; |
5ef92a2b PG |
1714 | /* Handle cases where ifname is optional. */ |
1715 | if (bs.key.ifname[0]) { | |
79b4a6fc RZ |
1716 | memset(bs.key.ifname, 0, sizeof(bs.key.ifname)); |
1717 | bsp = hash_lookup(bfd_key_hash, &bs); | |
5ef92a2b | 1718 | if (bsp) { |
48da2c31 RZ |
1719 | if (bglobal.debug_peer_event) |
1720 | zlog_debug(" peer %s found, but ifp %s ignored", | |
1721 | peer_buf, key.ifname); | |
5ef92a2b PG |
1722 | return bsp; |
1723 | } | |
1724 | } | |
e9e2c950 | 1725 | |
5ef92a2b PG |
1726 | /* Handle cases where local-address and ifname are optional. */ |
1727 | if (bs.key.family == AF_INET) { | |
1728 | memset(&bs.key.local, 0, sizeof(bs.key.local)); | |
1729 | bsp = hash_lookup(bfd_key_hash, &bs); | |
1730 | if (bsp) { | |
48da2c31 RZ |
1731 | if (bglobal.debug_peer_event) { |
1732 | char addr_buf[INET6_ADDRSTRLEN]; | |
1733 | inet_ntop(bs.key.family, &bs.key.local, | |
1734 | addr_buf, sizeof(addr_buf)); | |
1735 | zlog_debug( | |
3efd0893 | 1736 | " peer %s found, but ifp %s and loc-addr %s ignored", |
48da2c31 RZ |
1737 | peer_buf, key.ifname, addr_buf); |
1738 | } | |
5ef92a2b | 1739 | return bsp; |
79b4a6fc RZ |
1740 | } |
1741 | } | |
5ef92a2b | 1742 | bs.key = key; |
e9e2c950 | 1743 | |
5ef92a2b PG |
1744 | /* Handle case where a context more complex ctx is present. |
1745 | * input has no iface nor local-address, but a context may | |
1746 | * exist | |
1747 | */ | |
1748 | ctx.result = NULL; | |
1749 | ctx.given = &bs; | |
1750 | hash_walk(bfd_key_hash, | |
1751 | &bfd_key_lookup_ignore_partial_walker, | |
1752 | &ctx); | |
1753 | /* change key */ | |
1754 | if (ctx.result) { | |
1755 | bsp = ctx.result; | |
48da2c31 RZ |
1756 | if (bglobal.debug_peer_event) |
1757 | zlog_debug( | |
3efd0893 | 1758 | " peer %s found, but ifp and/or loc-addr params ignored", |
48da2c31 | 1759 | peer_buf); |
5ef92a2b | 1760 | } |
79b4a6fc | 1761 | return bsp; |
e9e2c950 RZ |
1762 | } |
1763 | ||
e9e2c950 RZ |
1764 | /* |
1765 | * Delete functions. | |
1766 | * | |
1767 | * Delete functions searches and remove the item from the hash and | |
1768 | * returns a pointer to the removed item data. If the item was not found | |
1769 | * then it returns NULL. | |
1770 | * | |
1771 | * The data stored inside the hash is not free()ed, so you must do it | |
1772 | * manually after getting the pointer back. | |
1773 | */ | |
1774 | struct bfd_session *bfd_id_delete(uint32_t id) | |
1775 | { | |
1776 | struct bfd_session bs; | |
1777 | ||
1778 | bs.discrs.my_discr = id; | |
1779 | ||
1780 | return hash_release(bfd_id_hash, &bs); | |
1781 | } | |
1782 | ||
79b4a6fc | 1783 | struct bfd_session *bfd_key_delete(struct bfd_key key) |
e9e2c950 RZ |
1784 | { |
1785 | struct bfd_session bs, *bsp; | |
1786 | ||
79b4a6fc RZ |
1787 | bs.key = key; |
1788 | bsp = hash_lookup(bfd_key_hash, &bs); | |
1789 | if (bsp == NULL && key.ifname[0]) { | |
1790 | memset(bs.key.ifname, 0, sizeof(bs.key.ifname)); | |
1791 | bsp = hash_lookup(bfd_key_hash, &bs); | |
e9e2c950 RZ |
1792 | } |
1793 | ||
79b4a6fc | 1794 | return hash_release(bfd_key_hash, bsp); |
e9e2c950 RZ |
1795 | } |
1796 | ||
e9e2c950 RZ |
1797 | /* Iteration functions. */ |
1798 | void bfd_id_iterate(hash_iter_func hif, void *arg) | |
1799 | { | |
1800 | hash_iterate(bfd_id_hash, hif, arg); | |
1801 | } | |
1802 | ||
79b4a6fc | 1803 | void bfd_key_iterate(hash_iter_func hif, void *arg) |
e9e2c950 | 1804 | { |
79b4a6fc | 1805 | hash_iterate(bfd_key_hash, hif, arg); |
e9e2c950 RZ |
1806 | } |
1807 | ||
e9e2c950 RZ |
1808 | /* |
1809 | * Insert functions. | |
1810 | * | |
1811 | * Inserts session into hash and returns `true` on success, otherwise | |
1812 | * `false`. | |
1813 | */ | |
1814 | bool bfd_id_insert(struct bfd_session *bs) | |
1815 | { | |
1816 | return (hash_get(bfd_id_hash, bs, hash_alloc_intern) == bs); | |
1817 | } | |
1818 | ||
79b4a6fc | 1819 | bool bfd_key_insert(struct bfd_session *bs) |
e9e2c950 | 1820 | { |
79b4a6fc | 1821 | return (hash_get(bfd_key_hash, bs, hash_alloc_intern) == bs); |
e9e2c950 RZ |
1822 | } |
1823 | ||
e9e2c950 RZ |
1824 | void bfd_initialize(void) |
1825 | { | |
1826 | bfd_id_hash = hash_create(bfd_id_hash_do, bfd_id_hash_cmp, | |
79b4a6fc RZ |
1827 | "BFD session discriminator hash"); |
1828 | bfd_key_hash = hash_create(bfd_key_hash_do, bfd_key_hash_cmp, | |
1829 | "BFD session hash"); | |
ccc9ada8 | 1830 | TAILQ_INIT(&bplist); |
e9e2c950 RZ |
1831 | } |
1832 | ||
e3b78da8 | 1833 | static void _bfd_free(struct hash_bucket *hb, |
e9e2c950 RZ |
1834 | void *arg __attribute__((__unused__))) |
1835 | { | |
1836 | struct bfd_session *bs = hb->data; | |
1837 | ||
1838 | bfd_session_free(bs); | |
1839 | } | |
1840 | ||
e9e2c950 RZ |
1841 | void bfd_shutdown(void) |
1842 | { | |
f6dfa247 RZ |
1843 | struct bfd_profile *bp; |
1844 | ||
e9e2c950 RZ |
1845 | /* |
1846 | * Close and free all BFD sessions. | |
1847 | * | |
1848 | * _bfd_free() will call bfd_session_free() which will take care | |
1849 | * of removing the session from all hashes, so we just run an | |
1850 | * assert() here to make sure it really happened. | |
1851 | */ | |
1852 | bfd_id_iterate(_bfd_free, NULL); | |
79b4a6fc | 1853 | assert(bfd_key_hash->count == 0); |
e9e2c950 | 1854 | |
e9e2c950 RZ |
1855 | /* Now free the hashes themselves. */ |
1856 | hash_free(bfd_id_hash); | |
79b4a6fc | 1857 | hash_free(bfd_key_hash); |
f6dfa247 RZ |
1858 | |
1859 | /* Free all profile allocations. */ | |
1860 | while ((bp = TAILQ_FIRST(&bplist)) != NULL) | |
1861 | bfd_profile_free(bp); | |
e9e2c950 | 1862 | } |
9fc0bc5c | 1863 | |
adc26455 RZ |
1864 | struct bfd_session_iterator { |
1865 | int bsi_stop; | |
1866 | bool bsi_mhop; | |
1867 | const struct bfd_session *bsi_bs; | |
1868 | }; | |
1869 | ||
307fc425 | 1870 | static int _bfd_session_next(struct hash_bucket *hb, void *arg) |
adc26455 RZ |
1871 | { |
1872 | struct bfd_session_iterator *bsi = arg; | |
1873 | struct bfd_session *bs = hb->data; | |
1874 | ||
1875 | /* Previous entry signaled stop. */ | |
1876 | if (bsi->bsi_stop == 1) { | |
1877 | /* Match the single/multi hop sessions. */ | |
1878 | if (bs->key.mhop != bsi->bsi_mhop) | |
1879 | return HASHWALK_CONTINUE; | |
1880 | ||
1881 | bsi->bsi_bs = bs; | |
1882 | return HASHWALK_ABORT; | |
1883 | } | |
1884 | ||
1885 | /* We found the current item, stop in the next one. */ | |
1886 | if (bsi->bsi_bs == hb->data) { | |
1887 | bsi->bsi_stop = 1; | |
1888 | /* Set entry to NULL to signal end of list. */ | |
1889 | bsi->bsi_bs = NULL; | |
1890 | } else if (bsi->bsi_bs == NULL && bsi->bsi_mhop == bs->key.mhop) { | |
1891 | /* We want the first list item. */ | |
1892 | bsi->bsi_stop = 1; | |
1893 | bsi->bsi_bs = hb->data; | |
1894 | return HASHWALK_ABORT; | |
1895 | } | |
1896 | ||
1897 | return HASHWALK_CONTINUE; | |
1898 | } | |
1899 | ||
1900 | /* | |
1901 | * bfd_session_next: uses the current session to find the next. | |
1902 | * | |
1903 | * `bs` might point to NULL to get the first item of the data structure. | |
1904 | */ | |
1905 | const struct bfd_session *bfd_session_next(const struct bfd_session *bs, | |
1906 | bool mhop) | |
1907 | { | |
1908 | struct bfd_session_iterator bsi; | |
1909 | ||
1910 | bsi.bsi_stop = 0; | |
1911 | bsi.bsi_bs = bs; | |
1912 | bsi.bsi_mhop = mhop; | |
1913 | hash_walk(bfd_key_hash, _bfd_session_next, &bsi); | |
1914 | if (bsi.bsi_stop == 0) | |
1915 | return NULL; | |
1916 | ||
1917 | return bsi.bsi_bs; | |
1918 | } | |
1919 | ||
307fc425 RZ |
1920 | static void _bfd_session_remove_manual(struct hash_bucket *hb, |
1921 | void *arg __attribute__((__unused__))) | |
2a573ff6 RZ |
1922 | { |
1923 | struct bfd_session *bs = hb->data; | |
1924 | ||
1925 | /* Delete only manually configured sessions. */ | |
b88113ef | 1926 | if (CHECK_FLAG(bs->flags, BFD_SESS_FLAG_CONFIG) == 0) |
2a573ff6 RZ |
1927 | return; |
1928 | ||
1929 | bs->refcount--; | |
b88113ef | 1930 | UNSET_FLAG(bs->flags, BFD_SESS_FLAG_CONFIG); |
2a573ff6 RZ |
1931 | |
1932 | /* Don't delete sessions still in use. */ | |
1933 | if (bs->refcount != 0) | |
1934 | return; | |
1935 | ||
1936 | bfd_session_free(bs); | |
1937 | } | |
1938 | ||
1939 | /* | |
1940 | * bfd_sessions_remove_manual: remove all manually configured sessions. | |
1941 | * | |
1942 | * NOTE: this function doesn't remove automatically created sessions. | |
1943 | */ | |
1944 | void bfd_sessions_remove_manual(void) | |
1945 | { | |
1946 | hash_iterate(bfd_key_hash, _bfd_session_remove_manual, NULL); | |
1947 | } | |
1948 | ||
ccc9ada8 RZ |
1949 | /* |
1950 | * Profile related hash functions. | |
1951 | */ | |
1952 | static void _bfd_profile_update(struct hash_bucket *hb, void *arg) | |
1953 | { | |
1954 | struct bfd_profile *bp = arg; | |
1955 | struct bfd_session *bs = hb->data; | |
1956 | ||
1957 | /* This session is not using the profile. */ | |
1958 | if (bs->profile_name == NULL || strcmp(bs->profile_name, bp->name) != 0) | |
1959 | return; | |
1960 | ||
1961 | bfd_profile_apply(bp->name, bs); | |
1962 | } | |
1963 | ||
1964 | void bfd_profile_update(struct bfd_profile *bp) | |
1965 | { | |
1966 | hash_iterate(bfd_key_hash, _bfd_profile_update, bp); | |
1967 | } | |
1968 | ||
f6dfa247 RZ |
1969 | static void _bfd_profile_detach(struct hash_bucket *hb, void *arg) |
1970 | { | |
1971 | struct bfd_profile *bp = arg; | |
1972 | struct bfd_session *bs = hb->data; | |
1973 | ||
1974 | /* This session is not using the profile. */ | |
1975 | if (bs->profile_name == NULL || strcmp(bs->profile_name, bp->name) != 0) | |
1976 | return; | |
1977 | ||
1978 | bfd_profile_remove(bs); | |
1979 | } | |
1980 | ||
1981 | static void bfd_profile_detach(struct bfd_profile *bp) | |
1982 | { | |
1983 | hash_iterate(bfd_key_hash, _bfd_profile_detach, bp); | |
1984 | } | |
1985 | ||
014cab13 RZ |
1986 | /* |
1987 | * VRF related functions. | |
1988 | */ | |
9fc0bc5c PG |
1989 | static int bfd_vrf_new(struct vrf *vrf) |
1990 | { | |
48da2c31 RZ |
1991 | if (bglobal.debug_zebra) |
1992 | zlog_debug("VRF Created: %s(%u)", vrf->name, vrf->vrf_id); | |
1993 | ||
9fc0bc5c PG |
1994 | return 0; |
1995 | } | |
1996 | ||
1997 | static int bfd_vrf_delete(struct vrf *vrf) | |
1998 | { | |
48da2c31 RZ |
1999 | if (bglobal.debug_zebra) |
2000 | zlog_debug("VRF Deletion: %s(%u)", vrf->name, vrf->vrf_id); | |
2001 | ||
9fc0bc5c PG |
2002 | return 0; |
2003 | } | |
2004 | ||
43ba41c1 PG |
2005 | static int bfd_vrf_update(struct vrf *vrf) |
2006 | { | |
2007 | if (!vrf_is_enabled(vrf)) | |
2008 | return 0; | |
48da2c31 RZ |
2009 | |
2010 | if (bglobal.debug_zebra) | |
2011 | zlog_debug("VRF update: %s(%u)", vrf->name, vrf->vrf_id); | |
2012 | ||
43ba41c1 PG |
2013 | /* a different name is given; update bfd list */ |
2014 | bfdd_sessions_enable_vrf(vrf); | |
2015 | return 0; | |
2016 | } | |
2017 | ||
9fc0bc5c PG |
2018 | static int bfd_vrf_enable(struct vrf *vrf) |
2019 | { | |
7bcadbae PG |
2020 | struct bfd_vrf_global *bvrf; |
2021 | ||
2022 | /* a different name */ | |
2023 | if (!vrf->info) { | |
2024 | bvrf = XCALLOC(MTYPE_BFDD_VRF, sizeof(struct bfd_vrf_global)); | |
2025 | bvrf->vrf = vrf; | |
2026 | vrf->info = (void *)bvrf; | |
2027 | } else | |
2028 | bvrf = vrf->info; | |
48da2c31 RZ |
2029 | |
2030 | if (bglobal.debug_zebra) | |
2031 | zlog_debug("VRF enable add %s id %u", vrf->name, vrf->vrf_id); | |
2032 | ||
30c5d21e PG |
2033 | if (vrf->vrf_id == VRF_DEFAULT || |
2034 | vrf_get_backend() == VRF_BACKEND_NETNS) { | |
2035 | if (!bvrf->bg_shop) | |
4a9feb66 | 2036 | bvrf->bg_shop = bp_udp_shop(vrf); |
30c5d21e | 2037 | if (!bvrf->bg_mhop) |
4a9feb66 | 2038 | bvrf->bg_mhop = bp_udp_mhop(vrf); |
30c5d21e | 2039 | if (!bvrf->bg_shop6) |
4a9feb66 | 2040 | bvrf->bg_shop6 = bp_udp6_shop(vrf); |
30c5d21e | 2041 | if (!bvrf->bg_mhop6) |
4a9feb66 | 2042 | bvrf->bg_mhop6 = bp_udp6_mhop(vrf); |
30c5d21e | 2043 | if (!bvrf->bg_echo) |
4a9feb66 | 2044 | bvrf->bg_echo = bp_echo_socket(vrf); |
30c5d21e | 2045 | if (!bvrf->bg_echov6) |
4a9feb66 | 2046 | bvrf->bg_echov6 = bp_echov6_socket(vrf); |
30c5d21e PG |
2047 | |
2048 | /* Add descriptors to the event loop. */ | |
2049 | if (!bvrf->bg_ev[0]) | |
2050 | thread_add_read(master, bfd_recv_cb, bvrf, bvrf->bg_shop, | |
2051 | &bvrf->bg_ev[0]); | |
2052 | if (!bvrf->bg_ev[1]) | |
2053 | thread_add_read(master, bfd_recv_cb, bvrf, bvrf->bg_mhop, | |
2054 | &bvrf->bg_ev[1]); | |
f1446f98 | 2055 | if (!bvrf->bg_ev[2] && bvrf->bg_shop6 != -1) |
30c5d21e PG |
2056 | thread_add_read(master, bfd_recv_cb, bvrf, bvrf->bg_shop6, |
2057 | &bvrf->bg_ev[2]); | |
f1446f98 | 2058 | if (!bvrf->bg_ev[3] && bvrf->bg_mhop6 != -1) |
30c5d21e PG |
2059 | thread_add_read(master, bfd_recv_cb, bvrf, bvrf->bg_mhop6, |
2060 | &bvrf->bg_ev[3]); | |
2061 | if (!bvrf->bg_ev[4]) | |
2062 | thread_add_read(master, bfd_recv_cb, bvrf, bvrf->bg_echo, | |
2063 | &bvrf->bg_ev[4]); | |
f1446f98 | 2064 | if (!bvrf->bg_ev[5] && bvrf->bg_echov6 != -1) |
30c5d21e PG |
2065 | thread_add_read(master, bfd_recv_cb, bvrf, bvrf->bg_echov6, |
2066 | &bvrf->bg_ev[5]); | |
2067 | } | |
d24af713 | 2068 | if (vrf->vrf_id != VRF_DEFAULT) { |
54aadda1 | 2069 | bfdd_zclient_register(vrf->vrf_id); |
d24af713 PG |
2070 | bfdd_sessions_enable_vrf(vrf); |
2071 | } | |
9fc0bc5c PG |
2072 | return 0; |
2073 | } | |
2074 | ||
2075 | static int bfd_vrf_disable(struct vrf *vrf) | |
2076 | { | |
7bcadbae PG |
2077 | struct bfd_vrf_global *bvrf; |
2078 | ||
2079 | if (!vrf->info) | |
9fc0bc5c | 2080 | return 0; |
7bcadbae | 2081 | bvrf = vrf->info; |
54aadda1 | 2082 | |
d24af713 PG |
2083 | if (vrf->vrf_id != VRF_DEFAULT) { |
2084 | bfdd_sessions_disable_vrf(vrf); | |
54aadda1 | 2085 | bfdd_zclient_unregister(vrf->vrf_id); |
d24af713 | 2086 | } |
54aadda1 | 2087 | |
48da2c31 RZ |
2088 | if (bglobal.debug_zebra) |
2089 | zlog_debug("VRF disable %s id %d", vrf->name, vrf->vrf_id); | |
507d75d4 RZ |
2090 | |
2091 | /* Disable read/write poll triggering. */ | |
2092 | THREAD_OFF(bvrf->bg_ev[0]); | |
2093 | THREAD_OFF(bvrf->bg_ev[1]); | |
2094 | THREAD_OFF(bvrf->bg_ev[2]); | |
2095 | THREAD_OFF(bvrf->bg_ev[3]); | |
2096 | THREAD_OFF(bvrf->bg_ev[4]); | |
2097 | THREAD_OFF(bvrf->bg_ev[5]); | |
2098 | ||
7bcadbae PG |
2099 | /* Close all descriptors. */ |
2100 | socket_close(&bvrf->bg_echo); | |
2101 | socket_close(&bvrf->bg_shop); | |
2102 | socket_close(&bvrf->bg_mhop); | |
f1446f98 DS |
2103 | if (bvrf->bg_shop6 != -1) |
2104 | socket_close(&bvrf->bg_shop6); | |
2105 | if (bvrf->bg_mhop6 != -1) | |
2106 | socket_close(&bvrf->bg_mhop6); | |
8cf3c217 | 2107 | socket_close(&bvrf->bg_echo); |
f1446f98 DS |
2108 | if (bvrf->bg_echov6 != -1) |
2109 | socket_close(&bvrf->bg_echov6); | |
7bcadbae PG |
2110 | |
2111 | /* free context */ | |
2112 | XFREE(MTYPE_BFDD_VRF, bvrf); | |
2113 | vrf->info = NULL; | |
2114 | ||
9fc0bc5c PG |
2115 | return 0; |
2116 | } | |
2117 | ||
2118 | void bfd_vrf_init(void) | |
2119 | { | |
2120 | vrf_init(bfd_vrf_new, bfd_vrf_enable, bfd_vrf_disable, | |
43ba41c1 | 2121 | bfd_vrf_delete, bfd_vrf_update); |
9fc0bc5c PG |
2122 | } |
2123 | ||
7bcadbae PG |
2124 | void bfd_vrf_terminate(void) |
2125 | { | |
2126 | vrf_terminate(); | |
2127 | } | |
2128 | ||
2129 | struct bfd_vrf_global *bfd_vrf_look_by_session(struct bfd_session *bfd) | |
2130 | { | |
2131 | struct vrf *vrf; | |
2132 | ||
2133 | if (!vrf_is_backend_netns()) { | |
2134 | vrf = vrf_lookup_by_id(VRF_DEFAULT); | |
2135 | if (vrf) | |
2136 | return (struct bfd_vrf_global *)vrf->info; | |
2137 | return NULL; | |
2138 | } | |
2139 | if (!bfd) | |
2140 | return NULL; | |
2141 | if (!bfd->vrf) | |
2142 | return NULL; | |
2143 | return bfd->vrf->info; | |
2144 | } | |
f06e248c PG |
2145 | |
2146 | void bfd_session_update_vrf_name(struct bfd_session *bs, struct vrf *vrf) | |
2147 | { | |
2148 | if (!vrf || !bs) | |
2149 | return; | |
2150 | /* update key */ | |
2151 | hash_release(bfd_key_hash, bs); | |
955d3ad8 PG |
2152 | /* |
2153 | * HACK: Change the BFD VRF in the running configuration directly, | |
2154 | * bypassing the northbound layer. This is necessary to avoid deleting | |
2155 | * the BFD and readding it in the new VRF, which would have | |
2156 | * several implications. | |
2157 | */ | |
2158 | if (yang_module_find("frr-bfdd") && bs->key.vrfname[0]) { | |
2159 | struct lyd_node *bfd_dnode; | |
2160 | char xpath[XPATH_MAXLEN], xpath_srcaddr[XPATH_MAXLEN + 32]; | |
3704ff56 | 2161 | char oldpath[XPATH_MAXLEN], newpath[XPATH_MAXLEN]; |
955d3ad8 PG |
2162 | char addr_buf[INET6_ADDRSTRLEN]; |
2163 | int slen; | |
2164 | ||
2165 | /* build xpath */ | |
2166 | if (bs->key.mhop) { | |
2167 | inet_ntop(bs->key.family, &bs->key.local, addr_buf, sizeof(addr_buf)); | |
2168 | snprintf(xpath_srcaddr, sizeof(xpath_srcaddr), "[source-addr='%s']", | |
2169 | addr_buf); | |
2170 | } else | |
2171 | xpath_srcaddr[0] = 0; | |
2172 | inet_ntop(bs->key.family, &bs->key.peer, addr_buf, sizeof(addr_buf)); | |
2173 | slen = snprintf(xpath, sizeof(xpath), | |
2174 | "/frr-bfdd:bfdd/bfd/sessions/%s%s[dest-addr='%s']", | |
2175 | bs->key.mhop ? "multi-hop" : "single-hop", xpath_srcaddr, | |
2176 | addr_buf); | |
2177 | if (bs->key.ifname[0]) | |
2178 | slen += snprintf(xpath + slen, sizeof(xpath) - slen, | |
2179 | "[interface='%s']", bs->key.ifname); | |
2180 | else | |
2181 | slen += snprintf(xpath + slen, sizeof(xpath) - slen, | |
4ec8e74b | 2182 | "[interface='*']"); |
955d3ad8 PG |
2183 | snprintf(xpath + slen, sizeof(xpath) - slen, "[vrf='%s']/vrf", |
2184 | bs->key.vrfname); | |
2185 | ||
8685be73 RW |
2186 | bfd_dnode = yang_dnode_get(running_config->dnode, xpath, |
2187 | bs->key.vrfname); | |
2188 | if (bfd_dnode) { | |
3704ff56 IR |
2189 | yang_dnode_get_path(bfd_dnode->parent, oldpath, |
2190 | sizeof(oldpath)); | |
8685be73 | 2191 | yang_dnode_change_leaf(bfd_dnode, vrf->name); |
3704ff56 IR |
2192 | yang_dnode_get_path(bfd_dnode->parent, newpath, |
2193 | sizeof(newpath)); | |
2194 | nb_running_move_tree(oldpath, newpath); | |
8685be73 | 2195 | running_config->version++; |
955d3ad8 PG |
2196 | } |
2197 | } | |
f06e248c PG |
2198 | memset(bs->key.vrfname, 0, sizeof(bs->key.vrfname)); |
2199 | strlcpy(bs->key.vrfname, vrf->name, sizeof(bs->key.vrfname)); | |
2200 | hash_get(bfd_key_hash, bs, hash_alloc_intern); | |
2201 | } | |
fa6e709f S |
2202 | |
2203 | unsigned long bfd_get_session_count(void) | |
2204 | { | |
2205 | return bfd_key_hash->count; | |
2206 | } |