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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 | ||
bf8d3d6a DL |
35 | DEFINE_MTYPE_STATIC(BFDD, BFDD_CONFIG, "long-lived configuration memory"); |
36 | DEFINE_MTYPE_STATIC(BFDD, BFDD_PROFILE, "long-lived profile memory"); | |
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 | { | |
59dad813 | 88 | bp->admin_shutdown = false; |
ccc9ada8 RZ |
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; |
4df3e31c IR |
93 | bp->min_echo_rx = BFD_DEF_REQ_MIN_ECHO_RX; |
94 | bp->min_echo_tx = BFD_DEF_DES_MIN_ECHO_TX; | |
ccc9ada8 RZ |
95 | bp->min_rx = BFD_DEFREQUIREDMINRX; |
96 | bp->min_tx = BFD_DEFDESIREDMINTX; | |
97 | } | |
98 | ||
99 | struct bfd_profile *bfd_profile_new(const char *name) | |
100 | { | |
101 | struct bfd_profile *bp; | |
102 | ||
103 | /* Search for duplicates. */ | |
104 | if (bfd_profile_lookup(name) != NULL) | |
105 | return NULL; | |
106 | ||
107 | /* Allocate, name it and put into list. */ | |
108 | bp = XCALLOC(MTYPE_BFDD_PROFILE, sizeof(*bp)); | |
109 | strlcpy(bp->name, name, sizeof(bp->name)); | |
110 | TAILQ_INSERT_TAIL(&bplist, bp, entry); | |
111 | ||
112 | /* Set default values. */ | |
113 | bfd_profile_set_default(bp); | |
114 | ||
115 | return bp; | |
116 | } | |
117 | ||
118 | void bfd_profile_free(struct bfd_profile *bp) | |
119 | { | |
f6dfa247 | 120 | /* Detach from any session. */ |
f3e1d224 RZ |
121 | if (bglobal.bg_shutdown == false) |
122 | bfd_profile_detach(bp); | |
f6dfa247 RZ |
123 | |
124 | /* Remove from global list. */ | |
ccc9ada8 | 125 | TAILQ_REMOVE(&bplist, bp, entry); |
dd8bc21d MS |
126 | |
127 | XFREE(MTYPE_BFDD_PROFILE, bp); | |
ccc9ada8 RZ |
128 | } |
129 | ||
ccc9ada8 RZ |
130 | void bfd_profile_apply(const char *profname, struct bfd_session *bs) |
131 | { | |
132 | struct bfd_profile *bp; | |
133 | ||
134 | /* Remove previous profile if any. */ | |
135 | if (bs->profile_name) { | |
ccc9ada8 RZ |
136 | /* We are changing profiles. */ |
137 | if (strcmp(bs->profile_name, profname)) { | |
138 | XFREE(MTYPE_BFDD_PROFILE, bs->profile_name); | |
139 | bs->profile_name = | |
140 | XSTRDUP(MTYPE_BFDD_PROFILE, profname); | |
141 | } | |
142 | } else /* Save the current profile name (in case it doesn't exist). */ | |
143 | bs->profile_name = XSTRDUP(MTYPE_BFDD_PROFILE, profname); | |
144 | ||
145 | /* Look up new profile to apply. */ | |
146 | bp = bfd_profile_lookup(profname); | |
ccc9ada8 RZ |
147 | |
148 | /* Point to profile if it exists. */ | |
149 | bs->profile = bp; | |
150 | ||
4e38f82a RZ |
151 | /* Apply configuration. */ |
152 | bfd_session_apply(bs); | |
153 | } | |
154 | ||
155 | void bfd_session_apply(struct bfd_session *bs) | |
156 | { | |
157 | struct bfd_profile *bp; | |
158 | uint32_t min_tx = bs->timers.desired_min_tx; | |
159 | uint32_t min_rx = bs->timers.required_min_rx; | |
160 | ||
161 | /* Pick the source of configuration. */ | |
162 | bp = bs->profile ? bs->profile : &bs->peer_profile; | |
163 | ||
ccc9ada8 RZ |
164 | /* Set multiplier if not the default. */ |
165 | if (bs->peer_profile.detection_multiplier == BFD_DEFDETECTMULT) | |
166 | bs->detect_mult = bp->detection_multiplier; | |
167 | else | |
168 | bs->detect_mult = bs->peer_profile.detection_multiplier; | |
169 | ||
170 | /* Set timers if not the default. */ | |
171 | if (bs->peer_profile.min_tx == BFD_DEFDESIREDMINTX) | |
172 | bs->timers.desired_min_tx = bp->min_tx; | |
173 | else | |
174 | bs->timers.desired_min_tx = bs->peer_profile.min_tx; | |
175 | ||
176 | if (bs->peer_profile.min_rx == BFD_DEFREQUIREDMINRX) | |
177 | bs->timers.required_min_rx = bp->min_rx; | |
178 | else | |
179 | bs->timers.required_min_rx = bs->peer_profile.min_rx; | |
180 | ||
181 | /* We can only apply echo options on single hop sessions. */ | |
182 | if (!CHECK_FLAG(bs->flags, BFD_SESS_FLAG_MH)) { | |
4df3e31c IR |
183 | /* Configure echo timers if they were default. */ |
184 | if (bs->peer_profile.min_echo_rx == BFD_DEF_REQ_MIN_ECHO_RX) | |
185 | bs->timers.required_min_echo_rx = bp->min_echo_rx; | |
ccc9ada8 | 186 | else |
4df3e31c | 187 | bs->timers.required_min_echo_rx = |
ccc9ada8 RZ |
188 | bs->peer_profile.min_echo_rx; |
189 | ||
4df3e31c IR |
190 | if (bs->peer_profile.min_echo_tx == BFD_DEF_DES_MIN_ECHO_TX) |
191 | bs->timers.desired_min_echo_tx = bp->min_echo_tx; | |
192 | else | |
193 | bs->timers.desired_min_echo_tx = | |
194 | bs->peer_profile.min_echo_tx; | |
195 | ||
ccc9ada8 RZ |
196 | /* Toggle echo if default value. */ |
197 | if (bs->peer_profile.echo_mode == false) | |
198 | bfd_set_echo(bs, bp->echo_mode); | |
199 | else | |
200 | bfd_set_echo(bs, bs->peer_profile.echo_mode); | |
262e1d25 RZ |
201 | } else { |
202 | /* Configure the TTL packet filter. */ | |
203 | if (bs->peer_profile.minimum_ttl == BFD_DEF_MHOP_TTL) | |
204 | bs->mh_ttl = bp->minimum_ttl; | |
205 | else | |
206 | bs->mh_ttl = bs->peer_profile.minimum_ttl; | |
ccc9ada8 RZ |
207 | } |
208 | ||
1a2e2fff RZ |
209 | /* Toggle 'passive-mode' if default value. */ |
210 | if (bs->peer_profile.passive == false) | |
211 | bfd_set_passive_mode(bs, bp->passive); | |
212 | else | |
213 | bfd_set_passive_mode(bs, bs->peer_profile.passive); | |
214 | ||
ccc9ada8 | 215 | /* Toggle 'no shutdown' if default value. */ |
59dad813 | 216 | if (bs->peer_profile.admin_shutdown == false) |
ccc9ada8 RZ |
217 | bfd_set_shutdown(bs, bp->admin_shutdown); |
218 | else | |
219 | bfd_set_shutdown(bs, bs->peer_profile.admin_shutdown); | |
4e38f82a RZ |
220 | |
221 | /* If session interval changed negotiate new timers. */ | |
222 | if (bs->ses_state == PTM_BFD_UP | |
223 | && (bs->timers.desired_min_tx != min_tx | |
224 | || bs->timers.required_min_rx != min_rx)) | |
225 | bfd_set_polling(bs); | |
efd04d60 RZ |
226 | |
227 | /* Send updated information to data plane. */ | |
228 | bfd_dplane_update_session(bs); | |
ccc9ada8 RZ |
229 | } |
230 | ||
231 | void bfd_profile_remove(struct bfd_session *bs) | |
232 | { | |
233 | /* Remove any previous set profile name. */ | |
234 | XFREE(MTYPE_BFDD_PROFILE, bs->profile_name); | |
4e38f82a | 235 | bs->profile = NULL; |
ccc9ada8 | 236 | |
4e38f82a | 237 | bfd_session_apply(bs); |
ccc9ada8 RZ |
238 | } |
239 | ||
79b4a6fc RZ |
240 | void gen_bfd_key(struct bfd_key *key, struct sockaddr_any *peer, |
241 | struct sockaddr_any *local, bool mhop, const char *ifname, | |
242 | const char *vrfname) | |
d245e522 | 243 | { |
79b4a6fc | 244 | memset(key, 0, sizeof(*key)); |
d245e522 | 245 | |
79b4a6fc RZ |
246 | switch (peer->sa_sin.sin_family) { |
247 | case AF_INET: | |
248 | key->family = AF_INET; | |
249 | memcpy(&key->peer, &peer->sa_sin.sin_addr, | |
250 | sizeof(peer->sa_sin.sin_addr)); | |
251 | memcpy(&key->local, &local->sa_sin.sin_addr, | |
252 | sizeof(local->sa_sin.sin_addr)); | |
253 | break; | |
254 | case AF_INET6: | |
255 | key->family = AF_INET6; | |
256 | memcpy(&key->peer, &peer->sa_sin6.sin6_addr, | |
257 | sizeof(peer->sa_sin6.sin6_addr)); | |
258 | memcpy(&key->local, &local->sa_sin6.sin6_addr, | |
259 | sizeof(local->sa_sin6.sin6_addr)); | |
d245e522 RZ |
260 | break; |
261 | } | |
d245e522 | 262 | |
79b4a6fc RZ |
263 | key->mhop = mhop; |
264 | if (ifname && ifname[0]) | |
265 | strlcpy(key->ifname, ifname, sizeof(key->ifname)); | |
266 | if (vrfname && vrfname[0]) | |
267 | strlcpy(key->vrfname, vrfname, sizeof(key->vrfname)); | |
adc26455 RZ |
268 | else |
269 | strlcpy(key->vrfname, VRF_DEFAULT_NAME, sizeof(key->vrfname)); | |
d245e522 RZ |
270 | } |
271 | ||
e9e2c950 RZ |
272 | struct bfd_session *bs_peer_find(struct bfd_peer_cfg *bpc) |
273 | { | |
274 | struct bfd_session *bs; | |
275 | struct peer_label *pl; | |
79b4a6fc | 276 | struct bfd_key key; |
e9e2c950 RZ |
277 | |
278 | /* Try to find label first. */ | |
279 | if (bpc->bpc_has_label) { | |
280 | pl = pl_find(bpc->bpc_label); | |
281 | if (pl != NULL) { | |
282 | bs = pl->pl_bs; | |
283 | return bs; | |
284 | } | |
285 | } | |
286 | ||
287 | /* Otherwise fallback to peer/local hash lookup. */ | |
79b4a6fc RZ |
288 | gen_bfd_key(&key, &bpc->bpc_peer, &bpc->bpc_local, bpc->bpc_mhop, |
289 | bpc->bpc_localif, bpc->bpc_vrfname); | |
e9e2c950 | 290 | |
79b4a6fc | 291 | return bfd_key_lookup(key); |
d245e522 RZ |
292 | } |
293 | ||
294 | /* | |
295 | * Starts a disabled BFD session. | |
296 | * | |
297 | * A session is disabled when the specified interface/VRF doesn't exist | |
298 | * yet. It might happen on FRR boot or with virtual interfaces. | |
299 | */ | |
300 | int bfd_session_enable(struct bfd_session *bs) | |
301 | { | |
d245e522 RZ |
302 | struct interface *ifp = NULL; |
303 | struct vrf *vrf = NULL; | |
304 | int psock; | |
305 | ||
efd04d60 RZ |
306 | /* We are using data plane, we don't need software. */ |
307 | if (bs->bdc) | |
308 | return 0; | |
309 | ||
d245e522 RZ |
310 | /* |
311 | * If the interface or VRF doesn't exist, then we must register | |
312 | * the session but delay its start. | |
313 | */ | |
218afa36 PG |
314 | if (bs->key.vrfname[0]) { |
315 | vrf = vrf_lookup_by_name(bs->key.vrfname); | |
d245e522 | 316 | if (vrf == NULL) { |
259b64eb | 317 | zlog_err( |
79b4a6fc | 318 | "session-enable: specified VRF doesn't exists."); |
d245e522 RZ |
319 | return 0; |
320 | } | |
321 | } | |
322 | ||
039c8158 PG |
323 | if (!vrf_is_backend_netns() && vrf && vrf->vrf_id != VRF_DEFAULT |
324 | && !if_lookup_by_name(vrf->name, vrf->vrf_id)) { | |
325 | zlog_err("session-enable: vrf interface %s not available yet", | |
326 | vrf->name); | |
327 | return 0; | |
328 | } | |
329 | ||
218afa36 PG |
330 | if (bs->key.ifname[0]) { |
331 | if (vrf) | |
332 | ifp = if_lookup_by_name(bs->key.ifname, vrf->vrf_id); | |
333 | else | |
334 | ifp = if_lookup_by_name_all_vrf(bs->key.ifname); | |
335 | if (ifp == NULL) { | |
259b64eb | 336 | zlog_err( |
99950bc5 PG |
337 | "session-enable: specified interface %s (VRF %s) doesn't exist.", |
338 | bs->key.ifname, vrf ? vrf->name : "<all>"); | |
d245e522 RZ |
339 | return 0; |
340 | } | |
218afa36 PG |
341 | if (bs->key.ifname[0] && !vrf) { |
342 | vrf = vrf_lookup_by_id(ifp->vrf_id); | |
343 | if (vrf == NULL) { | |
259b64eb | 344 | zlog_err( |
99950bc5 PG |
345 | "session-enable: specified VRF %u doesn't exist.", |
346 | ifp->vrf_id); | |
218afa36 PG |
347 | return 0; |
348 | } | |
349 | } | |
d245e522 RZ |
350 | } |
351 | ||
352 | /* Assign interface/VRF pointers. */ | |
353 | bs->vrf = vrf; | |
354 | if (bs->vrf == NULL) | |
355 | bs->vrf = vrf_lookup_by_id(VRF_DEFAULT); | |
102e2157 | 356 | assert(bs->vrf); |
d245e522 | 357 | |
efd04d60 RZ |
358 | /* Assign interface pointer (if any). */ |
359 | bs->ifp = ifp; | |
360 | ||
361 | /* Attempt to use data plane. */ | |
362 | if (bglobal.bg_use_dplane && bfd_dplane_add_session(bs) == 0) { | |
363 | control_notify_config(BCM_NOTIFY_CONFIG_ADD, bs); | |
364 | return 0; | |
365 | } | |
d245e522 | 366 | |
261e0ba9 RZ |
367 | /* Sanity check: don't leak open sockets. */ |
368 | if (bs->sock != -1) { | |
48da2c31 RZ |
369 | if (bglobal.debug_peer_event) |
370 | zlog_debug("session-enable: previous socket open"); | |
371 | ||
261e0ba9 RZ |
372 | close(bs->sock); |
373 | bs->sock = -1; | |
374 | } | |
375 | ||
d245e522 RZ |
376 | /* |
377 | * Get socket for transmitting control packets. Note that if we | |
378 | * could use the destination port (3784) for the source | |
379 | * port we wouldn't need a socket per session. | |
380 | */ | |
b88113ef | 381 | if (CHECK_FLAG(bs->flags, BFD_SESS_FLAG_IPV6) == 0) { |
d245e522 RZ |
382 | psock = bp_peer_socket(bs); |
383 | if (psock == -1) | |
261e0ba9 | 384 | return 0; |
d245e522 RZ |
385 | } else { |
386 | psock = bp_peer_socketv6(bs); | |
387 | if (psock == -1) | |
261e0ba9 | 388 | return 0; |
d245e522 RZ |
389 | } |
390 | ||
391 | /* | |
392 | * We've got a valid socket, lets start the timers and the | |
393 | * protocol. | |
394 | */ | |
395 | bs->sock = psock; | |
1a2e2fff RZ |
396 | |
397 | /* Only start timers if we are using active mode. */ | |
398 | if (CHECK_FLAG(bs->flags, BFD_SESS_FLAG_PASSIVE) == 0) { | |
399 | bfd_recvtimer_update(bs); | |
400 | ptm_bfd_start_xmt_timer(bs, false); | |
401 | } | |
d245e522 | 402 | |
d245e522 RZ |
403 | return 0; |
404 | } | |
405 | ||
406 | /* | |
407 | * Disabled a running BFD session. | |
408 | * | |
409 | * A session is disabled when the specified interface/VRF gets removed | |
410 | * (e.g. virtual interfaces). | |
411 | */ | |
412 | void bfd_session_disable(struct bfd_session *bs) | |
413 | { | |
efd04d60 RZ |
414 | /* We are using data plane, we don't need software. */ |
415 | if (bs->bdc) | |
416 | return; | |
417 | ||
d245e522 RZ |
418 | /* Free up socket resources. */ |
419 | if (bs->sock != -1) { | |
420 | close(bs->sock); | |
421 | bs->sock = -1; | |
422 | } | |
423 | ||
424 | /* Disable all timers. */ | |
425 | bfd_recvtimer_delete(bs); | |
d245e522 | 426 | bfd_xmttimer_delete(bs); |
8ee0862e | 427 | ptm_bfd_echo_stop(bs); |
8ee0862e RZ |
428 | |
429 | /* Set session down so it doesn't report UP and disabled. */ | |
430 | ptm_bfd_sess_dn(bs, BD_PATH_DOWN); | |
e9e2c950 RZ |
431 | } |
432 | ||
433 | static uint32_t ptm_bfd_gen_ID(void) | |
434 | { | |
843b324d | 435 | uint32_t session_id; |
e9e2c950 | 436 | |
843b324d RZ |
437 | /* |
438 | * RFC 5880, Section 6.8.1. recommends that we should generate | |
439 | * random session identification numbers. | |
440 | */ | |
441 | do { | |
5920b3eb RZ |
442 | session_id = ((frr_weak_random() << 16) & 0xFFFF0000) |
443 | | (frr_weak_random() & 0x0000FFFF); | |
843b324d RZ |
444 | } while (session_id == 0 || bfd_id_lookup(session_id) != NULL); |
445 | ||
446 | return session_id; | |
e9e2c950 RZ |
447 | } |
448 | ||
449 | void ptm_bfd_start_xmt_timer(struct bfd_session *bfd, bool is_echo) | |
450 | { | |
451 | uint64_t jitter, xmt_TO; | |
452 | int maxpercent; | |
453 | ||
454 | xmt_TO = is_echo ? bfd->echo_xmt_TO : bfd->xmt_TO; | |
455 | ||
456 | /* | |
457 | * From section 6.5.2: trasmit interval should be randomly jittered | |
458 | * between | |
459 | * 75% and 100% of nominal value, unless detect_mult is 1, then should | |
460 | * be | |
461 | * between 75% and 90%. | |
462 | */ | |
463 | maxpercent = (bfd->detect_mult == 1) ? 16 : 26; | |
5920b3eb | 464 | jitter = (xmt_TO * (75 + (frr_weak_random() % maxpercent))) / 100; |
e9e2c950 RZ |
465 | /* XXX remove that division above */ |
466 | ||
467 | if (is_echo) | |
468 | bfd_echo_xmttimer_update(bfd, jitter); | |
469 | else | |
470 | bfd_xmttimer_update(bfd, jitter); | |
471 | } | |
472 | ||
473 | static void ptm_bfd_echo_xmt_TO(struct bfd_session *bfd) | |
474 | { | |
475 | /* Send the scheduled echo packet */ | |
476 | ptm_bfd_echo_snd(bfd); | |
477 | ||
478 | /* Restart the timer for next time */ | |
479 | ptm_bfd_start_xmt_timer(bfd, true); | |
480 | } | |
481 | ||
482 | void ptm_bfd_xmt_TO(struct bfd_session *bfd, int fbit) | |
483 | { | |
484 | /* Send the scheduled control packet */ | |
485 | ptm_bfd_snd(bfd, fbit); | |
486 | ||
487 | /* Restart the timer for next time */ | |
488 | ptm_bfd_start_xmt_timer(bfd, false); | |
489 | } | |
490 | ||
8bd859f6 | 491 | void ptm_bfd_echo_stop(struct bfd_session *bfd) |
e9e2c950 RZ |
492 | { |
493 | bfd->echo_xmt_TO = 0; | |
494 | bfd->echo_detect_TO = 0; | |
b88113ef | 495 | UNSET_FLAG(bfd->flags, BFD_SESS_FLAG_ECHO_ACTIVE); |
e9e2c950 RZ |
496 | |
497 | bfd_echo_xmttimer_delete(bfd); | |
498 | bfd_echo_recvtimer_delete(bfd); | |
e9e2c950 RZ |
499 | } |
500 | ||
501 | void ptm_bfd_echo_start(struct bfd_session *bfd) | |
502 | { | |
503 | bfd->echo_detect_TO = (bfd->remote_detect_mult * bfd->echo_xmt_TO); | |
5aeb216e IR |
504 | if (bfd->echo_detect_TO > 0) { |
505 | bfd_echo_recvtimer_update(bfd); | |
451eb5a2 | 506 | ptm_bfd_echo_xmt_TO(bfd); |
5aeb216e | 507 | } |
e9e2c950 RZ |
508 | } |
509 | ||
bc50bcc8 | 510 | void ptm_bfd_sess_up(struct bfd_session *bfd) |
e9e2c950 | 511 | { |
03e7f088 RZ |
512 | int old_state = bfd->ses_state; |
513 | ||
e9e2c950 RZ |
514 | bfd->local_diag = 0; |
515 | bfd->ses_state = PTM_BFD_UP; | |
e9e2c950 RZ |
516 | monotime(&bfd->uptime); |
517 | ||
c0ef9a8a RZ |
518 | /* Connection is up, lets negotiate timers. */ |
519 | bfd_set_polling(bfd); | |
520 | ||
521 | /* Start sending control packets with poll bit immediately. */ | |
522 | ptm_bfd_snd(bfd, 0); | |
e9e2c950 | 523 | |
7555dc61 | 524 | control_notify(bfd, bfd->ses_state); |
e9e2c950 | 525 | |
0684c9b1 RZ |
526 | if (old_state != bfd->ses_state) { |
527 | bfd->stats.session_up++; | |
48da2c31 RZ |
528 | if (bglobal.debug_peer_event) |
529 | zlog_debug("state-change: [%s] %s -> %s", | |
530 | bs_to_string(bfd), state_list[old_state].str, | |
531 | state_list[bfd->ses_state].str); | |
0684c9b1 | 532 | } |
e9e2c950 RZ |
533 | } |
534 | ||
bc50bcc8 | 535 | void ptm_bfd_sess_dn(struct bfd_session *bfd, uint8_t diag) |
e9e2c950 RZ |
536 | { |
537 | int old_state = bfd->ses_state; | |
538 | ||
539 | bfd->local_diag = diag; | |
540 | bfd->discrs.remote_discr = 0; | |
541 | bfd->ses_state = PTM_BFD_DOWN; | |
542 | bfd->polling = 0; | |
543 | bfd->demand_mode = 0; | |
544 | monotime(&bfd->downtime); | |
545 | ||
8ee0862e RZ |
546 | /* |
547 | * Only attempt to send if we have a valid socket: | |
548 | * this function might be called by session disablers and in | |
549 | * this case we won't have a valid socket (i.e. interface was | |
550 | * removed or VRF doesn't exist anymore). | |
551 | */ | |
552 | if (bfd->sock != -1) | |
553 | ptm_bfd_snd(bfd, 0); | |
e9e2c950 | 554 | |
b912b189 RZ |
555 | /* Slow down the control packets, the connection is down. */ |
556 | bs_set_slow_timers(bfd); | |
557 | ||
e9e2c950 RZ |
558 | /* only signal clients when going from up->down state */ |
559 | if (old_state == PTM_BFD_UP) | |
7555dc61 | 560 | control_notify(bfd, PTM_BFD_DOWN); |
e9e2c950 | 561 | |
e9e2c950 | 562 | /* Stop echo packet transmission if they are active */ |
b88113ef | 563 | if (CHECK_FLAG(bfd->flags, BFD_SESS_FLAG_ECHO_ACTIVE)) |
8bd859f6 | 564 | ptm_bfd_echo_stop(bfd); |
03e7f088 | 565 | |
1a2e2fff RZ |
566 | /* Stop attempting to transmit or expect control packets if passive. */ |
567 | if (CHECK_FLAG(bfd->flags, BFD_SESS_FLAG_PASSIVE)) { | |
568 | bfd_recvtimer_delete(bfd); | |
569 | bfd_xmttimer_delete(bfd); | |
570 | } | |
571 | ||
0684c9b1 RZ |
572 | if (old_state != bfd->ses_state) { |
573 | bfd->stats.session_down++; | |
48da2c31 RZ |
574 | if (bglobal.debug_peer_event) |
575 | zlog_debug("state-change: [%s] %s -> %s reason:%s", | |
576 | bs_to_string(bfd), state_list[old_state].str, | |
577 | state_list[bfd->ses_state].str, | |
578 | get_diag_str(bfd->local_diag)); | |
0684c9b1 | 579 | } |
e9e2c950 RZ |
580 | } |
581 | ||
e9e2c950 RZ |
582 | static struct bfd_session *bfd_find_disc(struct sockaddr_any *sa, |
583 | uint32_t ldisc) | |
584 | { | |
585 | struct bfd_session *bs; | |
586 | ||
587 | bs = bfd_id_lookup(ldisc); | |
588 | if (bs == NULL) | |
589 | return NULL; | |
590 | ||
79b4a6fc | 591 | switch (bs->key.family) { |
e9e2c950 | 592 | case AF_INET: |
79b4a6fc RZ |
593 | if (memcmp(&sa->sa_sin.sin_addr, &bs->key.peer, |
594 | sizeof(sa->sa_sin.sin_addr))) | |
595 | return NULL; | |
e9e2c950 RZ |
596 | break; |
597 | case AF_INET6: | |
79b4a6fc RZ |
598 | if (memcmp(&sa->sa_sin6.sin6_addr, &bs->key.peer, |
599 | sizeof(sa->sa_sin6.sin6_addr))) | |
600 | return NULL; | |
e9e2c950 RZ |
601 | break; |
602 | } | |
603 | ||
79b4a6fc | 604 | return bs; |
e9e2c950 RZ |
605 | } |
606 | ||
b333abc2 | 607 | struct bfd_session *ptm_bfd_sess_find(struct bfd_pkt *cp, |
e9e2c950 RZ |
608 | struct sockaddr_any *peer, |
609 | struct sockaddr_any *local, | |
b333abc2 RZ |
610 | ifindex_t ifindex, vrf_id_t vrfid, |
611 | bool is_mhop) | |
e9e2c950 | 612 | { |
79b4a6fc RZ |
613 | struct interface *ifp; |
614 | struct vrf *vrf; | |
615 | struct bfd_key key; | |
e9e2c950 | 616 | |
9d63adda RZ |
617 | /* Find our session using the ID signaled by the remote end. */ |
618 | if (cp->discrs.remote_discr) | |
619 | return bfd_find_disc(peer, ntohl(cp->discrs.remote_discr)); | |
620 | ||
d1ca89ae RZ |
621 | /* |
622 | * Search for session without using discriminator. | |
623 | * | |
624 | * XXX: we can't trust `vrfid` because the VRF handling is not | |
625 | * properly implemented. Meanwhile we should use the interface | |
626 | * VRF to find out which one it belongs. | |
627 | */ | |
628 | ifp = if_lookup_by_index_all_vrf(ifindex); | |
629 | if (ifp == NULL) { | |
630 | if (vrfid != VRF_DEFAULT) | |
631 | vrf = vrf_lookup_by_id(vrfid); | |
632 | else | |
633 | vrf = NULL; | |
634 | } else | |
635 | vrf = vrf_lookup_by_id(ifp->vrf_id); | |
9d63adda | 636 | |
79b4a6fc | 637 | gen_bfd_key(&key, peer, local, is_mhop, ifp ? ifp->name : NULL, |
adc26455 | 638 | vrf ? vrf->name : VRF_DEFAULT_NAME); |
e9e2c950 | 639 | |
9d63adda | 640 | /* XXX maybe remoteDiscr should be checked for remoteHeard cases. */ |
79b4a6fc | 641 | return bfd_key_lookup(key); |
e9e2c950 RZ |
642 | } |
643 | ||
e9e2c950 RZ |
644 | int bfd_xmt_cb(struct thread *t) |
645 | { | |
646 | struct bfd_session *bs = THREAD_ARG(t); | |
647 | ||
648 | ptm_bfd_xmt_TO(bs, 0); | |
649 | ||
650 | return 0; | |
651 | } | |
652 | ||
653 | int bfd_echo_xmt_cb(struct thread *t) | |
654 | { | |
655 | struct bfd_session *bs = THREAD_ARG(t); | |
656 | ||
451eb5a2 RZ |
657 | if (bs->echo_xmt_TO > 0) |
658 | ptm_bfd_echo_xmt_TO(bs); | |
e9e2c950 RZ |
659 | |
660 | return 0; | |
661 | } | |
662 | ||
663 | /* Was ptm_bfd_detect_TO() */ | |
664 | int bfd_recvtimer_cb(struct thread *t) | |
665 | { | |
666 | struct bfd_session *bs = THREAD_ARG(t); | |
e9e2c950 RZ |
667 | |
668 | switch (bs->ses_state) { | |
669 | case PTM_BFD_INIT: | |
670 | case PTM_BFD_UP: | |
bc50bcc8 | 671 | ptm_bfd_sess_dn(bs, BD_CONTROL_EXPIRED); |
e9e2c950 RZ |
672 | bfd_recvtimer_update(bs); |
673 | break; | |
674 | ||
675 | default: | |
676 | /* Second detect time expiration, zero remote discr (section | |
677 | * 6.5.1) | |
678 | */ | |
679 | bs->discrs.remote_discr = 0; | |
680 | break; | |
681 | } | |
682 | ||
e9e2c950 RZ |
683 | return 0; |
684 | } | |
685 | ||
686 | /* Was ptm_bfd_echo_detect_TO() */ | |
687 | int bfd_echo_recvtimer_cb(struct thread *t) | |
688 | { | |
689 | struct bfd_session *bs = THREAD_ARG(t); | |
e9e2c950 RZ |
690 | |
691 | switch (bs->ses_state) { | |
692 | case PTM_BFD_INIT: | |
693 | case PTM_BFD_UP: | |
bc50bcc8 | 694 | ptm_bfd_sess_dn(bs, BD_ECHO_FAILED); |
e9e2c950 RZ |
695 | break; |
696 | } | |
697 | ||
e9e2c950 RZ |
698 | return 0; |
699 | } | |
700 | ||
014cab13 | 701 | struct bfd_session *bfd_session_new(void) |
e9e2c950 RZ |
702 | { |
703 | struct bfd_session *bs; | |
704 | ||
705 | bs = XCALLOC(MTYPE_BFDD_CONFIG, sizeof(*bs)); | |
e9e2c950 | 706 | |
ccc9ada8 RZ |
707 | /* Set peer session defaults. */ |
708 | bfd_profile_set_default(&bs->peer_profile); | |
709 | ||
f43b9368 | 710 | bs->timers.desired_min_tx = BFD_DEFDESIREDMINTX; |
e9e2c950 | 711 | bs->timers.required_min_rx = BFD_DEFREQUIREDMINRX; |
4df3e31c IR |
712 | bs->timers.required_min_echo_rx = BFD_DEF_REQ_MIN_ECHO_RX; |
713 | bs->timers.desired_min_echo_tx = BFD_DEF_DES_MIN_ECHO_TX; | |
e9e2c950 RZ |
714 | bs->detect_mult = BFD_DEFDETECTMULT; |
715 | bs->mh_ttl = BFD_DEF_MHOP_TTL; | |
d245e522 | 716 | bs->ses_state = PTM_BFD_DOWN; |
e9e2c950 | 717 | |
b912b189 RZ |
718 | /* Initiate connection with slow timers. */ |
719 | bs_set_slow_timers(bs); | |
f43b9368 RZ |
720 | |
721 | /* Initiate remote settings as well. */ | |
722 | bs->remote_timers = bs->cur_timers; | |
723 | bs->remote_detect_mult = BFD_DEFDETECTMULT; | |
724 | ||
d245e522 | 725 | bs->sock = -1; |
e9e2c950 RZ |
726 | monotime(&bs->uptime); |
727 | bs->downtime = bs->uptime; | |
728 | ||
729 | return bs; | |
730 | } | |
731 | ||
732 | int bfd_session_update_label(struct bfd_session *bs, const char *nlabel) | |
733 | { | |
734 | /* New label treatment: | |
735 | * - Check if the label is taken; | |
736 | * - Try to allocate the memory for it and register; | |
737 | */ | |
738 | if (bs->pl == NULL) { | |
739 | if (pl_find(nlabel) != NULL) { | |
740 | /* Someone is already using it. */ | |
741 | return -1; | |
742 | } | |
743 | ||
08de92af | 744 | pl_new(nlabel, bs); |
e9e2c950 RZ |
745 | |
746 | return 0; | |
747 | } | |
748 | ||
749 | /* | |
750 | * Test label change consistency: | |
751 | * - Do nothing if it's the same label; | |
752 | * - Check if the future label is already taken; | |
753 | * - Change label; | |
754 | */ | |
755 | if (strcmp(nlabel, bs->pl->pl_label) == 0) | |
756 | return -1; | |
757 | if (pl_find(nlabel) != NULL) | |
758 | return -1; | |
759 | ||
760 | strlcpy(bs->pl->pl_label, nlabel, sizeof(bs->pl->pl_label)); | |
761 | return 0; | |
762 | } | |
763 | ||
764 | static void _bfd_session_update(struct bfd_session *bs, | |
765 | struct bfd_peer_cfg *bpc) | |
766 | { | |
ccc9ada8 | 767 | if (bpc->bpc_has_txinterval) { |
f43b9368 | 768 | bs->timers.desired_min_tx = bpc->bpc_txinterval * 1000; |
ccc9ada8 RZ |
769 | bs->peer_profile.min_tx = bs->timers.desired_min_tx; |
770 | } | |
e9e2c950 | 771 | |
ccc9ada8 | 772 | if (bpc->bpc_has_recvinterval) { |
e9e2c950 | 773 | bs->timers.required_min_rx = bpc->bpc_recvinterval * 1000; |
ccc9ada8 RZ |
774 | bs->peer_profile.min_rx = bs->timers.required_min_rx; |
775 | } | |
e9e2c950 | 776 | |
ccc9ada8 | 777 | if (bpc->bpc_has_detectmultiplier) { |
e9e2c950 | 778 | bs->detect_mult = bpc->bpc_detectmultiplier; |
ccc9ada8 RZ |
779 | bs->peer_profile.detection_multiplier = bs->detect_mult; |
780 | } | |
e9e2c950 | 781 | |
4df3e31c IR |
782 | if (bpc->bpc_has_echorecvinterval) { |
783 | bs->timers.required_min_echo_rx = bpc->bpc_echorecvinterval * 1000; | |
784 | bs->peer_profile.min_echo_rx = bs->timers.required_min_echo_rx; | |
785 | } | |
786 | ||
787 | if (bpc->bpc_has_echotxinterval) { | |
788 | bs->timers.desired_min_echo_tx = bpc->bpc_echotxinterval * 1000; | |
789 | bs->peer_profile.min_echo_tx = bs->timers.desired_min_echo_tx; | |
ccc9ada8 | 790 | } |
e9e2c950 RZ |
791 | |
792 | if (bpc->bpc_has_label) | |
793 | bfd_session_update_label(bs, bpc->bpc_label); | |
794 | ||
4d12e1f9 | 795 | if (bpc->bpc_cbit) |
b88113ef | 796 | SET_FLAG(bs->flags, BFD_SESS_FLAG_CBIT); |
4d12e1f9 | 797 | else |
b88113ef | 798 | UNSET_FLAG(bs->flags, BFD_SESS_FLAG_CBIT); |
4d12e1f9 | 799 | |
262e1d25 RZ |
800 | if (bpc->bpc_has_minimum_ttl) { |
801 | bs->mh_ttl = bpc->bpc_minimum_ttl; | |
802 | bs->peer_profile.minimum_ttl = bpc->bpc_minimum_ttl; | |
803 | } | |
804 | ||
ccc9ada8 | 805 | bs->peer_profile.echo_mode = bpc->bpc_echo; |
4d12e1f9 RZ |
806 | bfd_set_echo(bs, bpc->bpc_echo); |
807 | ||
808 | /* | |
809 | * Shutdown needs to be the last in order to avoid timers enable when | |
810 | * the session is disabled. | |
811 | */ | |
ccc9ada8 | 812 | bs->peer_profile.admin_shutdown = bpc->bpc_shutdown; |
1a2e2fff | 813 | bfd_set_passive_mode(bs, bpc->bpc_passive); |
4d12e1f9 | 814 | bfd_set_shutdown(bs, bpc->bpc_shutdown); |
18322efd RZ |
815 | |
816 | /* | |
817 | * Apply profile last: it also calls `bfd_set_shutdown`. | |
818 | * | |
819 | * There is no problem calling `shutdown` twice if the value doesn't | |
820 | * change or if it is overriden by peer specific configuration. | |
821 | */ | |
822 | if (bpc->bpc_has_profile) | |
823 | bfd_profile_apply(bpc->bpc_profile, bs); | |
e9e2c950 RZ |
824 | } |
825 | ||
826 | static int bfd_session_update(struct bfd_session *bs, struct bfd_peer_cfg *bpc) | |
827 | { | |
828 | /* User didn't want to update, return failure. */ | |
829 | if (bpc->bpc_createonly) | |
830 | return -1; | |
831 | ||
832 | _bfd_session_update(bs, bpc); | |
833 | ||
e9e2c950 RZ |
834 | control_notify_config(BCM_NOTIFY_CONFIG_UPDATE, bs); |
835 | ||
836 | return 0; | |
837 | } | |
838 | ||
014cab13 | 839 | void bfd_session_free(struct bfd_session *bs) |
e9e2c950 | 840 | { |
d245e522 | 841 | struct bfd_session_observer *bso; |
e9e2c950 | 842 | |
d245e522 | 843 | bfd_session_disable(bs); |
e9e2c950 | 844 | |
efd04d60 RZ |
845 | /* Remove session from data plane if any. */ |
846 | bfd_dplane_delete_session(bs); | |
847 | ||
79b4a6fc RZ |
848 | bfd_key_delete(bs->key); |
849 | bfd_id_delete(bs->discrs.my_discr); | |
850 | ||
d245e522 RZ |
851 | /* Remove observer if any. */ |
852 | TAILQ_FOREACH(bso, &bglobal.bg_obslist, bso_entry) { | |
853 | if (bso->bso_bs != bs) | |
854 | continue; | |
855 | ||
856 | break; | |
857 | } | |
858 | if (bso != NULL) | |
859 | bs_observer_del(bso); | |
e9e2c950 RZ |
860 | |
861 | pl_free(bs->pl); | |
862 | ||
ccc9ada8 | 863 | XFREE(MTYPE_BFDD_PROFILE, bs->profile_name); |
e9e2c950 RZ |
864 | XFREE(MTYPE_BFDD_CONFIG, bs); |
865 | } | |
866 | ||
867 | struct bfd_session *ptm_bfd_sess_new(struct bfd_peer_cfg *bpc) | |
868 | { | |
869 | struct bfd_session *bfd, *l_bfd; | |
e9e2c950 RZ |
870 | |
871 | /* check to see if this needs a new session */ | |
872 | l_bfd = bs_peer_find(bpc); | |
873 | if (l_bfd) { | |
874 | /* Requesting a duplicated peer means update configuration. */ | |
875 | if (bfd_session_update(l_bfd, bpc) == 0) | |
876 | return l_bfd; | |
877 | else | |
878 | return NULL; | |
879 | } | |
880 | ||
d245e522 RZ |
881 | /* Get BFD session storage with its defaults. */ |
882 | bfd = bfd_session_new(); | |
e9e2c950 | 883 | |
d245e522 RZ |
884 | /* |
885 | * Store interface/VRF name in case we need to delay session | |
886 | * start. See `bfd_session_enable` for more information. | |
887 | */ | |
888 | if (bpc->bpc_has_localif) | |
79b4a6fc RZ |
889 | strlcpy(bfd->key.ifname, bpc->bpc_localif, |
890 | sizeof(bfd->key.ifname)); | |
e9e2c950 | 891 | |
d245e522 | 892 | if (bpc->bpc_has_vrfname) |
79b4a6fc RZ |
893 | strlcpy(bfd->key.vrfname, bpc->bpc_vrfname, |
894 | sizeof(bfd->key.vrfname)); | |
adc26455 RZ |
895 | else |
896 | strlcpy(bfd->key.vrfname, VRF_DEFAULT_NAME, | |
897 | sizeof(bfd->key.vrfname)); | |
e9e2c950 | 898 | |
d245e522 RZ |
899 | /* Copy remaining data. */ |
900 | if (bpc->bpc_ipv4 == false) | |
b88113ef | 901 | SET_FLAG(bfd->flags, BFD_SESS_FLAG_IPV6); |
e9e2c950 | 902 | |
79b4a6fc RZ |
903 | bfd->key.family = (bpc->bpc_ipv4) ? AF_INET : AF_INET6; |
904 | switch (bfd->key.family) { | |
905 | case AF_INET: | |
906 | memcpy(&bfd->key.peer, &bpc->bpc_peer.sa_sin.sin_addr, | |
907 | sizeof(bpc->bpc_peer.sa_sin.sin_addr)); | |
908 | memcpy(&bfd->key.local, &bpc->bpc_local.sa_sin.sin_addr, | |
909 | sizeof(bpc->bpc_local.sa_sin.sin_addr)); | |
910 | break; | |
911 | ||
912 | case AF_INET6: | |
913 | memcpy(&bfd->key.peer, &bpc->bpc_peer.sa_sin6.sin6_addr, | |
914 | sizeof(bpc->bpc_peer.sa_sin6.sin6_addr)); | |
915 | memcpy(&bfd->key.local, &bpc->bpc_local.sa_sin6.sin6_addr, | |
916 | sizeof(bpc->bpc_local.sa_sin6.sin6_addr)); | |
917 | break; | |
918 | ||
919 | default: | |
920 | assert(1); | |
921 | break; | |
d245e522 | 922 | } |
e9e2c950 | 923 | |
79b4a6fc | 924 | if (bpc->bpc_mhop) |
b88113ef | 925 | SET_FLAG(bfd->flags, BFD_SESS_FLAG_MH); |
79b4a6fc RZ |
926 | |
927 | bfd->key.mhop = bpc->bpc_mhop; | |
928 | ||
014cab13 RZ |
929 | if (bs_registrate(bfd) == NULL) |
930 | return NULL; | |
931 | ||
932 | /* Apply other configurations. */ | |
933 | _bfd_session_update(bfd, bpc); | |
934 | ||
935 | return bfd; | |
936 | } | |
937 | ||
938 | struct bfd_session *bs_registrate(struct bfd_session *bfd) | |
939 | { | |
79b4a6fc RZ |
940 | /* Registrate session into data structures. */ |
941 | bfd_key_insert(bfd); | |
942 | bfd->discrs.my_discr = ptm_bfd_gen_ID(); | |
943 | bfd_id_insert(bfd); | |
d245e522 RZ |
944 | |
945 | /* Try to enable session and schedule for packet receive/send. */ | |
946 | if (bfd_session_enable(bfd) == -1) { | |
947 | /* Unrecoverable failure, remove the session/peer. */ | |
948 | bfd_session_free(bfd); | |
949 | return NULL; | |
e9e2c950 RZ |
950 | } |
951 | ||
261e0ba9 RZ |
952 | /* Add observer if we have moving parts. */ |
953 | if (bfd->key.ifname[0] || bfd->key.vrfname[0] || bfd->sock == -1) | |
954 | bs_observer_add(bfd); | |
955 | ||
48da2c31 RZ |
956 | if (bglobal.debug_peer_event) |
957 | zlog_debug("session-new: %s", bs_to_string(bfd)); | |
e9e2c950 RZ |
958 | |
959 | control_notify_config(BCM_NOTIFY_CONFIG_ADD, bfd); | |
960 | ||
961 | return bfd; | |
962 | } | |
963 | ||
bc50bcc8 | 964 | int ptm_bfd_sess_del(struct bfd_peer_cfg *bpc) |
e9e2c950 RZ |
965 | { |
966 | struct bfd_session *bs; | |
967 | ||
968 | /* Find session and call free(). */ | |
969 | bs = bs_peer_find(bpc); | |
970 | if (bs == NULL) | |
971 | return -1; | |
972 | ||
973 | /* This pointer is being referenced, don't let it be deleted. */ | |
974 | if (bs->refcount > 0) { | |
6cde4b45 | 975 | zlog_err("session-delete: refcount failure: %" PRIu64" references", |
259b64eb | 976 | bs->refcount); |
e9e2c950 RZ |
977 | return -1; |
978 | } | |
979 | ||
48da2c31 RZ |
980 | if (bglobal.debug_peer_event) |
981 | zlog_debug("session-delete: %s", bs_to_string(bs)); | |
e9e2c950 RZ |
982 | |
983 | control_notify_config(BCM_NOTIFY_CONFIG_DELETE, bs); | |
984 | ||
985 | bfd_session_free(bs); | |
986 | ||
987 | return 0; | |
988 | } | |
989 | ||
d3f3a2c4 RZ |
990 | void bfd_set_polling(struct bfd_session *bs) |
991 | { | |
c0ef9a8a RZ |
992 | /* |
993 | * Start polling procedure: the only timers that require polling | |
994 | * to change value without losing connection are: | |
995 | * | |
996 | * - Desired minimum transmission interval; | |
997 | * - Required minimum receive interval; | |
998 | * | |
999 | * RFC 5880, Section 6.8.3. | |
1000 | */ | |
d3f3a2c4 RZ |
1001 | bs->polling = 1; |
1002 | } | |
1003 | ||
aef131af RZ |
1004 | /* |
1005 | * bs_<state>_handler() functions implement the BFD state machine | |
1006 | * transition mechanism. `<state>` is the current session state and | |
1007 | * the parameter `nstate` is the peer new state. | |
1008 | */ | |
9f37770f RZ |
1009 | static void bs_admin_down_handler(struct bfd_session *bs |
1010 | __attribute__((__unused__)), | |
1011 | int nstate __attribute__((__unused__))) | |
aef131af RZ |
1012 | { |
1013 | /* | |
1014 | * We are administratively down, there is no state machine | |
1015 | * handling. | |
1016 | */ | |
1017 | } | |
1018 | ||
9f37770f | 1019 | static void bs_down_handler(struct bfd_session *bs, int nstate) |
aef131af RZ |
1020 | { |
1021 | switch (nstate) { | |
1022 | case PTM_BFD_ADM_DOWN: | |
1023 | /* | |
1024 | * Remote peer doesn't want to talk, so lets keep the | |
1025 | * connection down. | |
1026 | */ | |
1027 | case PTM_BFD_UP: | |
1028 | /* Peer can't be up yet, wait it go to 'init' or 'down'. */ | |
1029 | break; | |
1030 | ||
1031 | case PTM_BFD_DOWN: | |
1032 | /* | |
1033 | * Remote peer agreed that the path is down, lets try to | |
1034 | * bring it up. | |
1035 | */ | |
1036 | bs->ses_state = PTM_BFD_INIT; | |
1a2e2fff RZ |
1037 | |
1038 | /* Answer peer with INIT immediately in passive mode. */ | |
1039 | if (CHECK_FLAG(bs->flags, BFD_SESS_FLAG_PASSIVE)) | |
1040 | ptm_bfd_snd(bs, 0); | |
aef131af RZ |
1041 | break; |
1042 | ||
1043 | case PTM_BFD_INIT: | |
1044 | /* | |
1045 | * Remote peer told us his path is up, lets turn | |
1046 | * activate the session. | |
1047 | */ | |
bc50bcc8 | 1048 | ptm_bfd_sess_up(bs); |
aef131af RZ |
1049 | break; |
1050 | ||
1051 | default: | |
48da2c31 RZ |
1052 | if (bglobal.debug_peer_event) |
1053 | zlog_debug("state-change: unhandled neighbor state: %d", | |
1054 | nstate); | |
aef131af RZ |
1055 | break; |
1056 | } | |
1057 | } | |
1058 | ||
9f37770f | 1059 | static void bs_init_handler(struct bfd_session *bs, int nstate) |
aef131af RZ |
1060 | { |
1061 | switch (nstate) { | |
1062 | case PTM_BFD_ADM_DOWN: | |
1063 | /* | |
1064 | * Remote peer doesn't want to talk, so lets make the | |
1065 | * connection down. | |
1066 | */ | |
1067 | bs->ses_state = PTM_BFD_DOWN; | |
1068 | break; | |
1069 | ||
1070 | case PTM_BFD_DOWN: | |
1071 | /* Remote peer hasn't moved to first stage yet. */ | |
1072 | break; | |
1073 | ||
1074 | case PTM_BFD_INIT: | |
1075 | case PTM_BFD_UP: | |
1076 | /* We agreed on the settings and the path is up. */ | |
bc50bcc8 | 1077 | ptm_bfd_sess_up(bs); |
aef131af RZ |
1078 | break; |
1079 | ||
1080 | default: | |
48da2c31 RZ |
1081 | if (bglobal.debug_peer_event) |
1082 | zlog_debug("state-change: unhandled neighbor state: %d", | |
1083 | nstate); | |
aef131af RZ |
1084 | break; |
1085 | } | |
1086 | } | |
1087 | ||
7555dc61 S |
1088 | static void bs_neighbour_admin_down_handler(struct bfd_session *bfd, |
1089 | uint8_t diag) | |
1090 | { | |
1091 | int old_state = bfd->ses_state; | |
1092 | ||
1093 | bfd->local_diag = diag; | |
1094 | bfd->discrs.remote_discr = 0; | |
1095 | bfd->ses_state = PTM_BFD_DOWN; | |
1096 | bfd->polling = 0; | |
1097 | bfd->demand_mode = 0; | |
1098 | monotime(&bfd->downtime); | |
1099 | ||
1100 | /* Slow down the control packets, the connection is down. */ | |
1101 | bs_set_slow_timers(bfd); | |
1102 | ||
1103 | /* only signal clients when going from up->down state */ | |
1104 | if (old_state == PTM_BFD_UP) | |
1105 | control_notify(bfd, PTM_BFD_ADM_DOWN); | |
1106 | ||
1107 | /* Stop echo packet transmission if they are active */ | |
b88113ef | 1108 | if (CHECK_FLAG(bfd->flags, BFD_SESS_FLAG_ECHO_ACTIVE)) |
7555dc61 S |
1109 | ptm_bfd_echo_stop(bfd); |
1110 | ||
1111 | if (old_state != bfd->ses_state) { | |
1112 | bfd->stats.session_down++; | |
48da2c31 RZ |
1113 | if (bglobal.debug_peer_event) |
1114 | zlog_debug("state-change: [%s] %s -> %s reason:%s", | |
1115 | bs_to_string(bfd), state_list[old_state].str, | |
1116 | state_list[bfd->ses_state].str, | |
1117 | get_diag_str(bfd->local_diag)); | |
7555dc61 S |
1118 | } |
1119 | } | |
1120 | ||
9f37770f | 1121 | static void bs_up_handler(struct bfd_session *bs, int nstate) |
aef131af RZ |
1122 | { |
1123 | switch (nstate) { | |
1124 | case PTM_BFD_ADM_DOWN: | |
7555dc61 S |
1125 | bs_neighbour_admin_down_handler(bs, BD_ADMIN_DOWN); |
1126 | break; | |
1127 | ||
aef131af RZ |
1128 | case PTM_BFD_DOWN: |
1129 | /* Peer lost or asked to shutdown connection. */ | |
bc50bcc8 | 1130 | ptm_bfd_sess_dn(bs, BD_NEIGHBOR_DOWN); |
aef131af RZ |
1131 | break; |
1132 | ||
1133 | case PTM_BFD_INIT: | |
1134 | case PTM_BFD_UP: | |
1135 | /* Path is up and working. */ | |
1136 | break; | |
1137 | ||
1138 | default: | |
48da2c31 RZ |
1139 | if (bglobal.debug_peer_event) |
1140 | zlog_debug("state-change: unhandled neighbor state: %d", | |
1141 | nstate); | |
aef131af RZ |
1142 | break; |
1143 | } | |
1144 | } | |
1145 | ||
1146 | void bs_state_handler(struct bfd_session *bs, int nstate) | |
1147 | { | |
1148 | switch (bs->ses_state) { | |
1149 | case PTM_BFD_ADM_DOWN: | |
1150 | bs_admin_down_handler(bs, nstate); | |
1151 | break; | |
1152 | case PTM_BFD_DOWN: | |
1153 | bs_down_handler(bs, nstate); | |
1154 | break; | |
1155 | case PTM_BFD_INIT: | |
1156 | bs_init_handler(bs, nstate); | |
1157 | break; | |
1158 | case PTM_BFD_UP: | |
1159 | bs_up_handler(bs, nstate); | |
1160 | break; | |
1161 | ||
1162 | default: | |
48da2c31 RZ |
1163 | if (bglobal.debug_peer_event) |
1164 | zlog_debug("state-change: [%s] is in invalid state: %d", | |
1165 | bs_to_string(bs), nstate); | |
aef131af RZ |
1166 | break; |
1167 | } | |
1168 | } | |
1169 | ||
c0ef9a8a RZ |
1170 | /* |
1171 | * Handles echo timer manipulation after updating timer. | |
1172 | */ | |
1173 | void bs_echo_timer_handler(struct bfd_session *bs) | |
1174 | { | |
1175 | uint32_t old_timer; | |
1176 | ||
1177 | /* | |
1178 | * Before doing any echo handling, check if it is possible to | |
1179 | * use it. | |
1180 | * | |
1181 | * - Check for `echo-mode` configuration. | |
1182 | * - Check that we are not using multi hop (RFC 5883, | |
1183 | * Section 3). | |
1184 | * - Check that we are already at the up state. | |
1185 | */ | |
b88113ef RZ |
1186 | if (CHECK_FLAG(bs->flags, BFD_SESS_FLAG_ECHO) == 0 |
1187 | || CHECK_FLAG(bs->flags, BFD_SESS_FLAG_MH) | |
c0ef9a8a RZ |
1188 | || bs->ses_state != PTM_BFD_UP) |
1189 | return; | |
1190 | ||
1191 | /* Remote peer asked to stop echo. */ | |
1192 | if (bs->remote_timers.required_min_echo == 0) { | |
b88113ef | 1193 | if (CHECK_FLAG(bs->flags, BFD_SESS_FLAG_ECHO_ACTIVE)) |
8bd859f6 | 1194 | ptm_bfd_echo_stop(bs); |
c0ef9a8a RZ |
1195 | |
1196 | return; | |
1197 | } | |
1198 | ||
1199 | /* | |
1200 | * Calculate the echo transmission timer: we must not send | |
1201 | * echo packets faster than the minimum required time | |
1202 | * announced by the remote system. | |
1203 | * | |
1204 | * RFC 5880, Section 6.8.9. | |
1205 | */ | |
1206 | old_timer = bs->echo_xmt_TO; | |
4df3e31c | 1207 | if (bs->remote_timers.required_min_echo > bs->timers.desired_min_echo_tx) |
c0ef9a8a RZ |
1208 | bs->echo_xmt_TO = bs->remote_timers.required_min_echo; |
1209 | else | |
4df3e31c | 1210 | bs->echo_xmt_TO = bs->timers.desired_min_echo_tx; |
c0ef9a8a | 1211 | |
b88113ef | 1212 | if (CHECK_FLAG(bs->flags, BFD_SESS_FLAG_ECHO_ACTIVE) == 0 |
c0ef9a8a RZ |
1213 | || old_timer != bs->echo_xmt_TO) |
1214 | ptm_bfd_echo_start(bs); | |
1215 | } | |
1216 | ||
1217 | /* | |
1218 | * RFC 5880 Section 6.5. | |
1219 | * | |
1220 | * When a BFD control packet with the final bit is received, we must | |
1221 | * update the session parameters. | |
1222 | */ | |
1223 | void bs_final_handler(struct bfd_session *bs) | |
1224 | { | |
1225 | /* Start using our new timers. */ | |
f43b9368 RZ |
1226 | bs->cur_timers.desired_min_tx = bs->timers.desired_min_tx; |
1227 | bs->cur_timers.required_min_rx = bs->timers.required_min_rx; | |
c0ef9a8a RZ |
1228 | |
1229 | /* | |
1230 | * TODO: demand mode. See RFC 5880 Section 6.1. | |
1231 | * | |
1232 | * When using demand mode we must disable the detection timer | |
1233 | * for lost control packets. | |
1234 | */ | |
1235 | if (bs->demand_mode) { | |
1236 | /* Notify watchers about changed timers. */ | |
1237 | control_notify_config(BCM_NOTIFY_CONFIG_UPDATE, bs); | |
1238 | return; | |
1239 | } | |
1240 | ||
1241 | /* | |
4caf6388 | 1242 | * Calculate transmission time based on new timers. |
c0ef9a8a RZ |
1243 | * |
1244 | * Transmission calculation: | |
4caf6388 RZ |
1245 | * Unless specified by exceptions at the end of Section 6.8.7, the |
1246 | * transmission time will be determined by the system with the | |
1247 | * slowest rate. | |
c0ef9a8a | 1248 | * |
4caf6388 | 1249 | * RFC 5880, Section 6.8.7. |
c0ef9a8a RZ |
1250 | */ |
1251 | if (bs->timers.desired_min_tx > bs->remote_timers.required_min_rx) | |
c0ef9a8a | 1252 | bs->xmt_TO = bs->timers.desired_min_tx; |
4caf6388 RZ |
1253 | else |
1254 | bs->xmt_TO = bs->remote_timers.required_min_rx; | |
c0ef9a8a RZ |
1255 | |
1256 | /* Apply new transmission timer immediately. */ | |
1257 | ptm_bfd_start_xmt_timer(bs, false); | |
1258 | ||
1259 | /* | |
1260 | * Detection timeout calculation: | |
1261 | * The minimum detection timeout is the remote detection | |
1262 | * multipler (number of packets to be missed) times the agreed | |
1263 | * transmission interval. | |
1264 | * | |
1265 | * RFC 5880, Section 6.8.4. | |
1266 | * | |
1267 | * TODO: support sending/counting more packets inside detection | |
1268 | * timeout. | |
1269 | */ | |
1e9bae03 | 1270 | if (bs->timers.required_min_rx > bs->remote_timers.desired_min_tx) |
c0ef9a8a | 1271 | bs->detect_TO = bs->remote_detect_mult |
1e9bae03 | 1272 | * bs->timers.required_min_rx; |
c0ef9a8a RZ |
1273 | else |
1274 | bs->detect_TO = bs->remote_detect_mult | |
1e9bae03 | 1275 | * bs->remote_timers.desired_min_tx; |
c0ef9a8a RZ |
1276 | |
1277 | /* Apply new receive timer immediately. */ | |
1278 | bfd_recvtimer_update(bs); | |
1279 | ||
1280 | /* Notify watchers about changed timers. */ | |
1281 | control_notify_config(BCM_NOTIFY_CONFIG_UPDATE, bs); | |
1282 | } | |
1283 | ||
b912b189 RZ |
1284 | void bs_set_slow_timers(struct bfd_session *bs) |
1285 | { | |
1286 | /* | |
1287 | * BFD connection must use slow timers before going up or after | |
1288 | * losing connectivity to avoid wasting bandwidth. | |
1289 | * | |
1290 | * RFC 5880, Section 6.8.3. | |
1291 | */ | |
1292 | bs->cur_timers.desired_min_tx = BFD_DEF_SLOWTX; | |
1293 | bs->cur_timers.required_min_rx = BFD_DEF_SLOWTX; | |
1294 | bs->cur_timers.required_min_echo = 0; | |
1295 | ||
1296 | /* Set the appropriated timeouts for slow connection. */ | |
1297 | bs->detect_TO = (BFD_DEFDETECTMULT * BFD_DEF_SLOWTX); | |
1298 | bs->xmt_TO = BFD_DEF_SLOWTX; | |
1299 | } | |
e9e2c950 | 1300 | |
4d12e1f9 RZ |
1301 | void bfd_set_echo(struct bfd_session *bs, bool echo) |
1302 | { | |
1303 | if (echo) { | |
1304 | /* Check if echo mode is already active. */ | |
1305 | if (CHECK_FLAG(bs->flags, BFD_SESS_FLAG_ECHO)) | |
1306 | return; | |
1307 | ||
1308 | SET_FLAG(bs->flags, BFD_SESS_FLAG_ECHO); | |
1309 | ||
1310 | /* Activate/update echo receive timeout timer. */ | |
efd04d60 RZ |
1311 | if (bs->bdc == NULL) |
1312 | bs_echo_timer_handler(bs); | |
4d12e1f9 RZ |
1313 | } else { |
1314 | /* Check if echo mode is already disabled. */ | |
1315 | if (!CHECK_FLAG(bs->flags, BFD_SESS_FLAG_ECHO)) | |
1316 | return; | |
1317 | ||
1318 | UNSET_FLAG(bs->flags, BFD_SESS_FLAG_ECHO); | |
efd04d60 RZ |
1319 | |
1320 | /* Deactivate timeout timer. */ | |
1321 | if (bs->bdc == NULL) | |
1322 | ptm_bfd_echo_stop(bs); | |
4d12e1f9 RZ |
1323 | } |
1324 | } | |
1325 | ||
1326 | void bfd_set_shutdown(struct bfd_session *bs, bool shutdown) | |
1327 | { | |
ccc9ada8 RZ |
1328 | bool is_shutdown; |
1329 | ||
1330 | /* | |
1331 | * Special case: we are batching changes and the previous state was | |
1332 | * not shutdown. Instead of potentially disconnect a running peer, | |
1333 | * we'll get the current status to validate we were really down. | |
1334 | */ | |
1335 | if (bs->ses_state == PTM_BFD_UP) | |
1336 | is_shutdown = false; | |
1337 | else | |
1338 | is_shutdown = CHECK_FLAG(bs->flags, BFD_SESS_FLAG_SHUTDOWN); | |
1339 | ||
4d12e1f9 RZ |
1340 | if (shutdown) { |
1341 | /* Already shutdown. */ | |
ccc9ada8 | 1342 | if (is_shutdown) |
4d12e1f9 RZ |
1343 | return; |
1344 | ||
1345 | SET_FLAG(bs->flags, BFD_SESS_FLAG_SHUTDOWN); | |
1346 | ||
efd04d60 RZ |
1347 | /* Handle data plane shutdown case. */ |
1348 | if (bs->bdc) { | |
1349 | bs->ses_state = PTM_BFD_ADM_DOWN; | |
1350 | bfd_dplane_update_session(bs); | |
1351 | control_notify(bs, bs->ses_state); | |
1352 | return; | |
1353 | } | |
1354 | ||
4d12e1f9 RZ |
1355 | /* Disable all events. */ |
1356 | bfd_recvtimer_delete(bs); | |
1357 | bfd_echo_recvtimer_delete(bs); | |
1358 | bfd_xmttimer_delete(bs); | |
1359 | bfd_echo_xmttimer_delete(bs); | |
1360 | ||
1361 | /* Change and notify state change. */ | |
1362 | bs->ses_state = PTM_BFD_ADM_DOWN; | |
1363 | control_notify(bs, bs->ses_state); | |
1364 | ||
1365 | /* Don't try to send packets with a disabled session. */ | |
1366 | if (bs->sock != -1) | |
1367 | ptm_bfd_snd(bs, 0); | |
1368 | } else { | |
1369 | /* Already working. */ | |
ccc9ada8 | 1370 | if (!is_shutdown) |
4d12e1f9 RZ |
1371 | return; |
1372 | ||
1373 | UNSET_FLAG(bs->flags, BFD_SESS_FLAG_SHUTDOWN); | |
1374 | ||
efd04d60 RZ |
1375 | /* Handle data plane shutdown case. */ |
1376 | if (bs->bdc) { | |
1377 | bs->ses_state = PTM_BFD_DOWN; | |
1378 | bfd_dplane_update_session(bs); | |
1379 | control_notify(bs, bs->ses_state); | |
1380 | return; | |
1381 | } | |
1382 | ||
4d12e1f9 RZ |
1383 | /* Change and notify state change. */ |
1384 | bs->ses_state = PTM_BFD_DOWN; | |
1385 | control_notify(bs, bs->ses_state); | |
1386 | ||
1a2e2fff RZ |
1387 | /* Enable timers if non passive, otherwise stop them. */ |
1388 | if (CHECK_FLAG(bs->flags, BFD_SESS_FLAG_PASSIVE)) { | |
1389 | bfd_recvtimer_delete(bs); | |
1390 | bfd_xmttimer_delete(bs); | |
1391 | } else { | |
1392 | bfd_recvtimer_update(bs); | |
1393 | bfd_xmttimer_update(bs, bs->xmt_TO); | |
1394 | } | |
1395 | } | |
1396 | } | |
1397 | ||
1398 | void bfd_set_passive_mode(struct bfd_session *bs, bool passive) | |
1399 | { | |
1400 | if (passive) { | |
1401 | SET_FLAG(bs->flags, BFD_SESS_FLAG_PASSIVE); | |
1402 | ||
1403 | /* Session is already up and running, nothing to do now. */ | |
1404 | if (bs->ses_state != PTM_BFD_DOWN) | |
1405 | return; | |
1406 | ||
1407 | /* Lets disable the timers since we are now passive. */ | |
1408 | bfd_recvtimer_delete(bs); | |
1409 | bfd_xmttimer_delete(bs); | |
1410 | } else { | |
1411 | UNSET_FLAG(bs->flags, BFD_SESS_FLAG_PASSIVE); | |
1412 | ||
1413 | /* Session is already up and running, nothing to do now. */ | |
1414 | if (bs->ses_state != PTM_BFD_DOWN) | |
1415 | return; | |
1416 | ||
1417 | /* Session is down, let it attempt to start the connection. */ | |
4d12e1f9 | 1418 | bfd_xmttimer_update(bs, bs->xmt_TO); |
1a2e2fff | 1419 | bfd_recvtimer_update(bs); |
4d12e1f9 RZ |
1420 | } |
1421 | } | |
1422 | ||
e9e2c950 RZ |
1423 | /* |
1424 | * Helper functions. | |
1425 | */ | |
1426 | static const char *get_diag_str(int diag) | |
1427 | { | |
1428 | for (int i = 0; diag_list[i].str; i++) { | |
1429 | if (diag_list[i].type == diag) | |
1430 | return diag_list[i].str; | |
1431 | } | |
1432 | return "N/A"; | |
1433 | } | |
1434 | ||
6e10bd97 | 1435 | const char *satostr(const struct sockaddr_any *sa) |
e9e2c950 RZ |
1436 | { |
1437 | #define INETSTR_BUFCOUNT 8 | |
1438 | static char buf[INETSTR_BUFCOUNT][INET6_ADDRSTRLEN]; | |
1439 | static int bufidx; | |
6e10bd97 RZ |
1440 | const struct sockaddr_in *sin = &sa->sa_sin; |
1441 | const struct sockaddr_in6 *sin6 = &sa->sa_sin6; | |
e9e2c950 RZ |
1442 | |
1443 | bufidx += (bufidx + 1) % INETSTR_BUFCOUNT; | |
1444 | buf[bufidx][0] = 0; | |
1445 | ||
1446 | switch (sin->sin_family) { | |
1447 | case AF_INET: | |
1448 | inet_ntop(AF_INET, &sin->sin_addr, buf[bufidx], | |
1449 | sizeof(buf[bufidx])); | |
1450 | break; | |
1451 | case AF_INET6: | |
1452 | inet_ntop(AF_INET6, &sin6->sin6_addr, buf[bufidx], | |
1453 | sizeof(buf[bufidx])); | |
1454 | break; | |
1455 | ||
1456 | default: | |
1457 | strlcpy(buf[bufidx], "unknown", sizeof(buf[bufidx])); | |
1458 | break; | |
1459 | } | |
1460 | ||
1461 | return buf[bufidx]; | |
1462 | } | |
1463 | ||
1464 | const char *diag2str(uint8_t diag) | |
1465 | { | |
1466 | switch (diag) { | |
1467 | case 0: | |
1468 | return "ok"; | |
1469 | case 1: | |
1470 | return "control detection time expired"; | |
1471 | case 2: | |
1472 | return "echo function failed"; | |
1473 | case 3: | |
1474 | return "neighbor signaled session down"; | |
1475 | case 4: | |
1476 | return "forwarding plane reset"; | |
1477 | case 5: | |
1478 | return "path down"; | |
1479 | case 6: | |
1480 | return "concatenated path down"; | |
1481 | case 7: | |
1482 | return "administratively down"; | |
1483 | case 8: | |
1484 | return "reverse concatenated path down"; | |
1485 | default: | |
1486 | return "unknown"; | |
1487 | } | |
1488 | } | |
1489 | ||
1490 | int strtosa(const char *addr, struct sockaddr_any *sa) | |
1491 | { | |
1492 | memset(sa, 0, sizeof(*sa)); | |
1493 | ||
1494 | if (inet_pton(AF_INET, addr, &sa->sa_sin.sin_addr) == 1) { | |
1495 | sa->sa_sin.sin_family = AF_INET; | |
1496 | #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN | |
1497 | sa->sa_sin.sin_len = sizeof(sa->sa_sin); | |
1498 | #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */ | |
1499 | return 0; | |
1500 | } | |
1501 | ||
1502 | if (inet_pton(AF_INET6, addr, &sa->sa_sin6.sin6_addr) == 1) { | |
1503 | sa->sa_sin6.sin6_family = AF_INET6; | |
1504 | #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN | |
1505 | sa->sa_sin6.sin6_len = sizeof(sa->sa_sin6); | |
1506 | #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */ | |
1507 | return 0; | |
1508 | } | |
1509 | ||
1510 | return -1; | |
1511 | } | |
1512 | ||
1513 | void integer2timestr(uint64_t time, char *buf, size_t buflen) | |
1514 | { | |
1515 | unsigned int year, month, day, hour, minute, second; | |
1516 | int rv; | |
1517 | ||
1518 | #define MINUTES (60) | |
23586b05 DS |
1519 | #define HOURS (60 * MINUTES) |
1520 | #define DAYS (24 * HOURS) | |
1521 | #define MONTHS (30 * DAYS) | |
1522 | #define YEARS (12 * MONTHS) | |
e9e2c950 RZ |
1523 | if (time >= YEARS) { |
1524 | year = time / YEARS; | |
1525 | time -= year * YEARS; | |
1526 | ||
1527 | rv = snprintf(buf, buflen, "%u year(s), ", year); | |
1528 | buf += rv; | |
1529 | buflen -= rv; | |
1530 | } | |
1531 | if (time >= MONTHS) { | |
1532 | month = time / MONTHS; | |
1533 | time -= month * MONTHS; | |
1534 | ||
1535 | rv = snprintf(buf, buflen, "%u month(s), ", month); | |
1536 | buf += rv; | |
1537 | buflen -= rv; | |
1538 | } | |
1539 | if (time >= DAYS) { | |
1540 | day = time / DAYS; | |
1541 | time -= day * DAYS; | |
1542 | ||
1543 | rv = snprintf(buf, buflen, "%u day(s), ", day); | |
1544 | buf += rv; | |
1545 | buflen -= rv; | |
1546 | } | |
1547 | if (time >= HOURS) { | |
1548 | hour = time / HOURS; | |
1549 | time -= hour * HOURS; | |
1550 | ||
1551 | rv = snprintf(buf, buflen, "%u hour(s), ", hour); | |
1552 | buf += rv; | |
1553 | buflen -= rv; | |
1554 | } | |
1555 | if (time >= MINUTES) { | |
1556 | minute = time / MINUTES; | |
1557 | time -= minute * MINUTES; | |
1558 | ||
1559 | rv = snprintf(buf, buflen, "%u minute(s), ", minute); | |
1560 | buf += rv; | |
1561 | buflen -= rv; | |
1562 | } | |
1563 | second = time % MINUTES; | |
1564 | snprintf(buf, buflen, "%u second(s)", second); | |
1565 | } | |
1566 | ||
79b4a6fc | 1567 | const char *bs_to_string(const struct bfd_session *bs) |
03e7f088 RZ |
1568 | { |
1569 | static char buf[256]; | |
79b4a6fc | 1570 | char addr_buf[INET6_ADDRSTRLEN]; |
03e7f088 | 1571 | int pos; |
b88113ef | 1572 | bool is_mhop = CHECK_FLAG(bs->flags, BFD_SESS_FLAG_MH); |
03e7f088 RZ |
1573 | |
1574 | pos = snprintf(buf, sizeof(buf), "mhop:%s", is_mhop ? "yes" : "no"); | |
79b4a6fc RZ |
1575 | pos += snprintf(buf + pos, sizeof(buf) - pos, " peer:%s", |
1576 | inet_ntop(bs->key.family, &bs->key.peer, addr_buf, | |
1577 | sizeof(addr_buf))); | |
1578 | pos += snprintf(buf + pos, sizeof(buf) - pos, " local:%s", | |
1579 | inet_ntop(bs->key.family, &bs->key.local, addr_buf, | |
1580 | sizeof(addr_buf))); | |
1581 | if (bs->key.vrfname[0]) | |
1582 | pos += snprintf(buf + pos, sizeof(buf) - pos, " vrf:%s", | |
1583 | bs->key.vrfname); | |
1584 | if (bs->key.ifname[0]) | |
1585 | pos += snprintf(buf + pos, sizeof(buf) - pos, " ifname:%s", | |
1586 | bs->key.ifname); | |
3cef9b7f DS |
1587 | |
1588 | (void)pos; | |
1589 | ||
03e7f088 RZ |
1590 | return buf; |
1591 | } | |
1592 | ||
d245e522 RZ |
1593 | int bs_observer_add(struct bfd_session *bs) |
1594 | { | |
1595 | struct bfd_session_observer *bso; | |
1596 | ||
ed74032b | 1597 | bso = XCALLOC(MTYPE_BFDD_SESSION_OBSERVER, sizeof(*bso)); |
d245e522 | 1598 | bso->bso_bs = bs; |
ced291de RZ |
1599 | bso->bso_addr.family = bs->key.family; |
1600 | memcpy(&bso->bso_addr.u.prefix, &bs->key.local, | |
1601 | sizeof(bs->key.local)); | |
261e0ba9 | 1602 | |
d245e522 RZ |
1603 | TAILQ_INSERT_TAIL(&bglobal.bg_obslist, bso, bso_entry); |
1604 | ||
1605 | return 0; | |
1606 | } | |
1607 | ||
1608 | void bs_observer_del(struct bfd_session_observer *bso) | |
1609 | { | |
1610 | TAILQ_REMOVE(&bglobal.bg_obslist, bso, bso_entry); | |
1611 | XFREE(MTYPE_BFDD_SESSION_OBSERVER, bso); | |
1612 | } | |
1613 | ||
79b4a6fc RZ |
1614 | void bs_to_bpc(struct bfd_session *bs, struct bfd_peer_cfg *bpc) |
1615 | { | |
1616 | memset(bpc, 0, sizeof(*bpc)); | |
1617 | ||
1618 | bpc->bpc_ipv4 = (bs->key.family == AF_INET); | |
1619 | bpc->bpc_mhop = bs->key.mhop; | |
1620 | ||
1621 | switch (bs->key.family) { | |
1622 | case AF_INET: | |
1623 | bpc->bpc_peer.sa_sin.sin_family = AF_INET; | |
1624 | memcpy(&bpc->bpc_peer.sa_sin.sin_addr, &bs->key.peer, | |
1625 | sizeof(bpc->bpc_peer.sa_sin.sin_addr)); | |
1626 | ||
1627 | if (memcmp(&bs->key.local, &zero_addr, sizeof(bs->key.local))) { | |
1628 | bpc->bpc_local.sa_sin.sin_family = AF_INET6; | |
5ff7d1be | 1629 | memcpy(&bpc->bpc_local.sa_sin.sin_addr, &bs->key.local, |
79b4a6fc RZ |
1630 | sizeof(bpc->bpc_local.sa_sin.sin_addr)); |
1631 | } | |
1632 | break; | |
1633 | ||
1634 | case AF_INET6: | |
1635 | bpc->bpc_peer.sa_sin.sin_family = AF_INET6; | |
1636 | memcpy(&bpc->bpc_peer.sa_sin6.sin6_addr, &bs->key.peer, | |
1637 | sizeof(bpc->bpc_peer.sa_sin6.sin6_addr)); | |
1638 | ||
1639 | bpc->bpc_local.sa_sin6.sin6_family = AF_INET6; | |
5ff7d1be | 1640 | memcpy(&bpc->bpc_local.sa_sin6.sin6_addr, &bs->key.local, |
79b4a6fc RZ |
1641 | sizeof(bpc->bpc_local.sa_sin6.sin6_addr)); |
1642 | break; | |
1643 | } | |
1644 | ||
1645 | if (bs->key.ifname[0]) { | |
1646 | bpc->bpc_has_localif = true; | |
1647 | strlcpy(bpc->bpc_localif, bs->key.ifname, | |
1648 | sizeof(bpc->bpc_localif)); | |
1649 | } | |
1650 | ||
1651 | if (bs->key.vrfname[0]) { | |
1652 | bpc->bpc_has_vrfname = true; | |
1653 | strlcpy(bpc->bpc_vrfname, bs->key.vrfname, | |
1654 | sizeof(bpc->bpc_vrfname)); | |
1655 | } | |
1656 | } | |
1657 | ||
e9e2c950 RZ |
1658 | |
1659 | /* | |
1660 | * BFD hash data structures to find sessions. | |
1661 | */ | |
1662 | static struct hash *bfd_id_hash; | |
79b4a6fc | 1663 | static struct hash *bfd_key_hash; |
e9e2c950 | 1664 | |
d8b87afe QY |
1665 | static unsigned int bfd_id_hash_do(const void *p); |
1666 | static unsigned int bfd_key_hash_do(const void *p); | |
e9e2c950 | 1667 | |
e3b78da8 | 1668 | static void _bfd_free(struct hash_bucket *hb, |
e9e2c950 | 1669 | void *arg __attribute__((__unused__))); |
e9e2c950 RZ |
1670 | |
1671 | /* BFD hash for our discriminator. */ | |
d8b87afe | 1672 | static unsigned int bfd_id_hash_do(const void *p) |
e9e2c950 | 1673 | { |
d8b87afe | 1674 | const struct bfd_session *bs = p; |
e9e2c950 RZ |
1675 | |
1676 | return jhash_1word(bs->discrs.my_discr, 0); | |
1677 | } | |
1678 | ||
74df8d6d | 1679 | static bool bfd_id_hash_cmp(const void *n1, const void *n2) |
e9e2c950 RZ |
1680 | { |
1681 | const struct bfd_session *bs1 = n1, *bs2 = n2; | |
1682 | ||
1683 | return bs1->discrs.my_discr == bs2->discrs.my_discr; | |
1684 | } | |
1685 | ||
1686 | /* BFD hash for single hop. */ | |
d8b87afe | 1687 | static unsigned int bfd_key_hash_do(const void *p) |
e9e2c950 | 1688 | { |
d8b87afe | 1689 | const struct bfd_session *bs = p; |
6cfcb775 | 1690 | struct bfd_key key = bs->key; |
e9e2c950 | 1691 | |
6cfcb775 IR |
1692 | /* |
1693 | * Local address and interface name are optional and | |
1694 | * can be filled any time after session creation. | |
1695 | * Hash key should not depend on these fields. | |
1696 | */ | |
1697 | memset(&key.local, 0, sizeof(key.local)); | |
1698 | memset(key.ifname, 0, sizeof(key.ifname)); | |
1699 | ||
1700 | return jhash(&key, sizeof(key), 0); | |
e9e2c950 RZ |
1701 | } |
1702 | ||
79b4a6fc | 1703 | static bool bfd_key_hash_cmp(const void *n1, const void *n2) |
e9e2c950 RZ |
1704 | { |
1705 | const struct bfd_session *bs1 = n1, *bs2 = n2; | |
1706 | ||
6cfcb775 IR |
1707 | if (bs1->key.family != bs2->key.family) |
1708 | return false; | |
1709 | if (bs1->key.mhop != bs2->key.mhop) | |
1710 | return false; | |
1711 | if (memcmp(&bs1->key.peer, &bs2->key.peer, sizeof(bs1->key.peer))) | |
1712 | return false; | |
1713 | if (memcmp(bs1->key.vrfname, bs2->key.vrfname, | |
1714 | sizeof(bs1->key.vrfname))) | |
1715 | return false; | |
1716 | ||
1717 | /* | |
1718 | * Local address is optional and can be empty. | |
1719 | * If both addresses are not empty and different, | |
1720 | * then the keys are different. | |
1721 | */ | |
1722 | if (memcmp(&bs1->key.local, &zero_addr, sizeof(bs1->key.local)) | |
1723 | && memcmp(&bs2->key.local, &zero_addr, sizeof(bs2->key.local)) | |
1724 | && memcmp(&bs1->key.local, &bs2->key.local, sizeof(bs1->key.local))) | |
1725 | return false; | |
1726 | ||
1727 | /* | |
1728 | * Interface name is optional and can be empty. | |
1729 | * If both names are not empty and different, | |
1730 | * then the keys are different. | |
1731 | */ | |
1732 | if (bs1->key.ifname[0] && bs2->key.ifname[0] | |
1733 | && memcmp(bs1->key.ifname, bs2->key.ifname, | |
1734 | sizeof(bs1->key.ifname))) | |
1735 | return false; | |
1736 | ||
1737 | return true; | |
e9e2c950 RZ |
1738 | } |
1739 | ||
e9e2c950 | 1740 | |
e9e2c950 RZ |
1741 | /* |
1742 | * Hash public interface / exported functions. | |
1743 | */ | |
1744 | ||
1745 | /* Lookup functions. */ | |
1746 | struct bfd_session *bfd_id_lookup(uint32_t id) | |
1747 | { | |
1748 | struct bfd_session bs; | |
1749 | ||
1750 | bs.discrs.my_discr = id; | |
1751 | ||
1752 | return hash_lookup(bfd_id_hash, &bs); | |
1753 | } | |
1754 | ||
79b4a6fc | 1755 | struct bfd_session *bfd_key_lookup(struct bfd_key key) |
e9e2c950 | 1756 | { |
6cfcb775 | 1757 | struct bfd_session bs; |
e9e2c950 | 1758 | |
79b4a6fc | 1759 | bs.key = key; |
e9e2c950 | 1760 | |
6cfcb775 | 1761 | return hash_lookup(bfd_key_hash, &bs); |
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 | 1784 | { |
6cfcb775 | 1785 | struct bfd_session bs; |
e9e2c950 | 1786 | |
79b4a6fc | 1787 | bs.key = key; |
e9e2c950 | 1788 | |
6cfcb775 | 1789 | return hash_release(bfd_key_hash, &bs); |
e9e2c950 RZ |
1790 | } |
1791 | ||
e9e2c950 RZ |
1792 | /* Iteration functions. */ |
1793 | void bfd_id_iterate(hash_iter_func hif, void *arg) | |
1794 | { | |
1795 | hash_iterate(bfd_id_hash, hif, arg); | |
1796 | } | |
1797 | ||
79b4a6fc | 1798 | void bfd_key_iterate(hash_iter_func hif, void *arg) |
e9e2c950 | 1799 | { |
79b4a6fc | 1800 | hash_iterate(bfd_key_hash, hif, arg); |
e9e2c950 RZ |
1801 | } |
1802 | ||
e9e2c950 RZ |
1803 | /* |
1804 | * Insert functions. | |
1805 | * | |
1806 | * Inserts session into hash and returns `true` on success, otherwise | |
1807 | * `false`. | |
1808 | */ | |
1809 | bool bfd_id_insert(struct bfd_session *bs) | |
1810 | { | |
1811 | return (hash_get(bfd_id_hash, bs, hash_alloc_intern) == bs); | |
1812 | } | |
1813 | ||
79b4a6fc | 1814 | bool bfd_key_insert(struct bfd_session *bs) |
e9e2c950 | 1815 | { |
79b4a6fc | 1816 | return (hash_get(bfd_key_hash, bs, hash_alloc_intern) == bs); |
e9e2c950 RZ |
1817 | } |
1818 | ||
e9e2c950 RZ |
1819 | void bfd_initialize(void) |
1820 | { | |
1821 | bfd_id_hash = hash_create(bfd_id_hash_do, bfd_id_hash_cmp, | |
79b4a6fc RZ |
1822 | "BFD session discriminator hash"); |
1823 | bfd_key_hash = hash_create(bfd_key_hash_do, bfd_key_hash_cmp, | |
1824 | "BFD session hash"); | |
ccc9ada8 | 1825 | TAILQ_INIT(&bplist); |
e9e2c950 RZ |
1826 | } |
1827 | ||
e3b78da8 | 1828 | static void _bfd_free(struct hash_bucket *hb, |
e9e2c950 RZ |
1829 | void *arg __attribute__((__unused__))) |
1830 | { | |
1831 | struct bfd_session *bs = hb->data; | |
1832 | ||
1833 | bfd_session_free(bs); | |
1834 | } | |
1835 | ||
e9e2c950 RZ |
1836 | void bfd_shutdown(void) |
1837 | { | |
f6dfa247 RZ |
1838 | struct bfd_profile *bp; |
1839 | ||
e9e2c950 RZ |
1840 | /* |
1841 | * Close and free all BFD sessions. | |
1842 | * | |
1843 | * _bfd_free() will call bfd_session_free() which will take care | |
1844 | * of removing the session from all hashes, so we just run an | |
1845 | * assert() here to make sure it really happened. | |
1846 | */ | |
1847 | bfd_id_iterate(_bfd_free, NULL); | |
79b4a6fc | 1848 | assert(bfd_key_hash->count == 0); |
e9e2c950 | 1849 | |
e9e2c950 RZ |
1850 | /* Now free the hashes themselves. */ |
1851 | hash_free(bfd_id_hash); | |
79b4a6fc | 1852 | hash_free(bfd_key_hash); |
f6dfa247 RZ |
1853 | |
1854 | /* Free all profile allocations. */ | |
1855 | while ((bp = TAILQ_FIRST(&bplist)) != NULL) | |
1856 | bfd_profile_free(bp); | |
e9e2c950 | 1857 | } |
9fc0bc5c | 1858 | |
adc26455 RZ |
1859 | struct bfd_session_iterator { |
1860 | int bsi_stop; | |
1861 | bool bsi_mhop; | |
1862 | const struct bfd_session *bsi_bs; | |
1863 | }; | |
1864 | ||
307fc425 | 1865 | static int _bfd_session_next(struct hash_bucket *hb, void *arg) |
adc26455 RZ |
1866 | { |
1867 | struct bfd_session_iterator *bsi = arg; | |
1868 | struct bfd_session *bs = hb->data; | |
1869 | ||
1870 | /* Previous entry signaled stop. */ | |
1871 | if (bsi->bsi_stop == 1) { | |
1872 | /* Match the single/multi hop sessions. */ | |
1873 | if (bs->key.mhop != bsi->bsi_mhop) | |
1874 | return HASHWALK_CONTINUE; | |
1875 | ||
1876 | bsi->bsi_bs = bs; | |
1877 | return HASHWALK_ABORT; | |
1878 | } | |
1879 | ||
1880 | /* We found the current item, stop in the next one. */ | |
1881 | if (bsi->bsi_bs == hb->data) { | |
1882 | bsi->bsi_stop = 1; | |
1883 | /* Set entry to NULL to signal end of list. */ | |
1884 | bsi->bsi_bs = NULL; | |
1885 | } else if (bsi->bsi_bs == NULL && bsi->bsi_mhop == bs->key.mhop) { | |
1886 | /* We want the first list item. */ | |
1887 | bsi->bsi_stop = 1; | |
1888 | bsi->bsi_bs = hb->data; | |
1889 | return HASHWALK_ABORT; | |
1890 | } | |
1891 | ||
1892 | return HASHWALK_CONTINUE; | |
1893 | } | |
1894 | ||
1895 | /* | |
1896 | * bfd_session_next: uses the current session to find the next. | |
1897 | * | |
1898 | * `bs` might point to NULL to get the first item of the data structure. | |
1899 | */ | |
1900 | const struct bfd_session *bfd_session_next(const struct bfd_session *bs, | |
1901 | bool mhop) | |
1902 | { | |
1903 | struct bfd_session_iterator bsi; | |
1904 | ||
1905 | bsi.bsi_stop = 0; | |
1906 | bsi.bsi_bs = bs; | |
1907 | bsi.bsi_mhop = mhop; | |
1908 | hash_walk(bfd_key_hash, _bfd_session_next, &bsi); | |
1909 | if (bsi.bsi_stop == 0) | |
1910 | return NULL; | |
1911 | ||
1912 | return bsi.bsi_bs; | |
1913 | } | |
1914 | ||
307fc425 RZ |
1915 | static void _bfd_session_remove_manual(struct hash_bucket *hb, |
1916 | void *arg __attribute__((__unused__))) | |
2a573ff6 RZ |
1917 | { |
1918 | struct bfd_session *bs = hb->data; | |
1919 | ||
1920 | /* Delete only manually configured sessions. */ | |
b88113ef | 1921 | if (CHECK_FLAG(bs->flags, BFD_SESS_FLAG_CONFIG) == 0) |
2a573ff6 RZ |
1922 | return; |
1923 | ||
1924 | bs->refcount--; | |
b88113ef | 1925 | UNSET_FLAG(bs->flags, BFD_SESS_FLAG_CONFIG); |
2a573ff6 RZ |
1926 | |
1927 | /* Don't delete sessions still in use. */ | |
1928 | if (bs->refcount != 0) | |
1929 | return; | |
1930 | ||
1931 | bfd_session_free(bs); | |
1932 | } | |
1933 | ||
1934 | /* | |
1935 | * bfd_sessions_remove_manual: remove all manually configured sessions. | |
1936 | * | |
1937 | * NOTE: this function doesn't remove automatically created sessions. | |
1938 | */ | |
1939 | void bfd_sessions_remove_manual(void) | |
1940 | { | |
1941 | hash_iterate(bfd_key_hash, _bfd_session_remove_manual, NULL); | |
1942 | } | |
1943 | ||
e93c3c00 IR |
1944 | void bfd_profiles_remove(void) |
1945 | { | |
1946 | struct bfd_profile *bp; | |
1947 | ||
1948 | while ((bp = TAILQ_FIRST(&bplist)) != NULL) | |
1949 | bfd_profile_free(bp); | |
1950 | } | |
1951 | ||
ccc9ada8 RZ |
1952 | /* |
1953 | * Profile related hash functions. | |
1954 | */ | |
1955 | static void _bfd_profile_update(struct hash_bucket *hb, void *arg) | |
1956 | { | |
1957 | struct bfd_profile *bp = arg; | |
1958 | struct bfd_session *bs = hb->data; | |
1959 | ||
1960 | /* This session is not using the profile. */ | |
1961 | if (bs->profile_name == NULL || strcmp(bs->profile_name, bp->name) != 0) | |
1962 | return; | |
1963 | ||
1964 | bfd_profile_apply(bp->name, bs); | |
1965 | } | |
1966 | ||
1967 | void bfd_profile_update(struct bfd_profile *bp) | |
1968 | { | |
1969 | hash_iterate(bfd_key_hash, _bfd_profile_update, bp); | |
1970 | } | |
1971 | ||
f6dfa247 RZ |
1972 | static void _bfd_profile_detach(struct hash_bucket *hb, void *arg) |
1973 | { | |
1974 | struct bfd_profile *bp = arg; | |
1975 | struct bfd_session *bs = hb->data; | |
1976 | ||
1977 | /* This session is not using the profile. */ | |
1978 | if (bs->profile_name == NULL || strcmp(bs->profile_name, bp->name) != 0) | |
1979 | return; | |
1980 | ||
1981 | bfd_profile_remove(bs); | |
1982 | } | |
1983 | ||
1984 | static void bfd_profile_detach(struct bfd_profile *bp) | |
1985 | { | |
1986 | hash_iterate(bfd_key_hash, _bfd_profile_detach, bp); | |
1987 | } | |
1988 | ||
014cab13 RZ |
1989 | /* |
1990 | * VRF related functions. | |
1991 | */ | |
9fc0bc5c PG |
1992 | static int bfd_vrf_new(struct vrf *vrf) |
1993 | { | |
48da2c31 RZ |
1994 | if (bglobal.debug_zebra) |
1995 | zlog_debug("VRF Created: %s(%u)", vrf->name, vrf->vrf_id); | |
1996 | ||
9fc0bc5c PG |
1997 | return 0; |
1998 | } | |
1999 | ||
2000 | static int bfd_vrf_delete(struct vrf *vrf) | |
2001 | { | |
48da2c31 RZ |
2002 | if (bglobal.debug_zebra) |
2003 | zlog_debug("VRF Deletion: %s(%u)", vrf->name, vrf->vrf_id); | |
2004 | ||
9fc0bc5c PG |
2005 | return 0; |
2006 | } | |
2007 | ||
43ba41c1 PG |
2008 | static int bfd_vrf_update(struct vrf *vrf) |
2009 | { | |
2010 | if (!vrf_is_enabled(vrf)) | |
2011 | return 0; | |
48da2c31 RZ |
2012 | |
2013 | if (bglobal.debug_zebra) | |
2014 | zlog_debug("VRF update: %s(%u)", vrf->name, vrf->vrf_id); | |
2015 | ||
43ba41c1 PG |
2016 | /* a different name is given; update bfd list */ |
2017 | bfdd_sessions_enable_vrf(vrf); | |
2018 | return 0; | |
2019 | } | |
2020 | ||
9fc0bc5c PG |
2021 | static int bfd_vrf_enable(struct vrf *vrf) |
2022 | { | |
7bcadbae PG |
2023 | struct bfd_vrf_global *bvrf; |
2024 | ||
2025 | /* a different name */ | |
2026 | if (!vrf->info) { | |
2027 | bvrf = XCALLOC(MTYPE_BFDD_VRF, sizeof(struct bfd_vrf_global)); | |
2028 | bvrf->vrf = vrf; | |
2029 | vrf->info = (void *)bvrf; | |
29397ec1 RZ |
2030 | |
2031 | /* Disable sockets if using data plane. */ | |
2032 | if (bglobal.bg_use_dplane) { | |
2033 | bvrf->bg_shop = -1; | |
2034 | bvrf->bg_mhop = -1; | |
2035 | bvrf->bg_shop6 = -1; | |
2036 | bvrf->bg_mhop6 = -1; | |
2037 | bvrf->bg_echo = -1; | |
2038 | bvrf->bg_echov6 = -1; | |
2039 | } | |
7bcadbae PG |
2040 | } else |
2041 | bvrf = vrf->info; | |
48da2c31 RZ |
2042 | |
2043 | if (bglobal.debug_zebra) | |
2044 | zlog_debug("VRF enable add %s id %u", vrf->name, vrf->vrf_id); | |
2045 | ||
30c5d21e PG |
2046 | if (vrf->vrf_id == VRF_DEFAULT || |
2047 | vrf_get_backend() == VRF_BACKEND_NETNS) { | |
2048 | if (!bvrf->bg_shop) | |
4a9feb66 | 2049 | bvrf->bg_shop = bp_udp_shop(vrf); |
30c5d21e | 2050 | if (!bvrf->bg_mhop) |
4a9feb66 | 2051 | bvrf->bg_mhop = bp_udp_mhop(vrf); |
30c5d21e | 2052 | if (!bvrf->bg_shop6) |
4a9feb66 | 2053 | bvrf->bg_shop6 = bp_udp6_shop(vrf); |
30c5d21e | 2054 | if (!bvrf->bg_mhop6) |
4a9feb66 | 2055 | bvrf->bg_mhop6 = bp_udp6_mhop(vrf); |
30c5d21e | 2056 | if (!bvrf->bg_echo) |
4a9feb66 | 2057 | bvrf->bg_echo = bp_echo_socket(vrf); |
30c5d21e | 2058 | if (!bvrf->bg_echov6) |
4a9feb66 | 2059 | bvrf->bg_echov6 = bp_echov6_socket(vrf); |
30c5d21e | 2060 | |
29397ec1 RZ |
2061 | if (!bvrf->bg_ev[0] && bvrf->bg_shop != -1) |
2062 | thread_add_read(master, bfd_recv_cb, bvrf, | |
2063 | bvrf->bg_shop, &bvrf->bg_ev[0]); | |
2064 | if (!bvrf->bg_ev[1] && bvrf->bg_mhop != -1) | |
2065 | thread_add_read(master, bfd_recv_cb, bvrf, | |
2066 | bvrf->bg_mhop, &bvrf->bg_ev[1]); | |
f1446f98 | 2067 | if (!bvrf->bg_ev[2] && bvrf->bg_shop6 != -1) |
29397ec1 RZ |
2068 | thread_add_read(master, bfd_recv_cb, bvrf, |
2069 | bvrf->bg_shop6, &bvrf->bg_ev[2]); | |
f1446f98 | 2070 | if (!bvrf->bg_ev[3] && bvrf->bg_mhop6 != -1) |
29397ec1 RZ |
2071 | thread_add_read(master, bfd_recv_cb, bvrf, |
2072 | bvrf->bg_mhop6, &bvrf->bg_ev[3]); | |
2073 | if (!bvrf->bg_ev[4] && bvrf->bg_echo != -1) | |
2074 | thread_add_read(master, bfd_recv_cb, bvrf, | |
2075 | bvrf->bg_echo, &bvrf->bg_ev[4]); | |
f1446f98 | 2076 | if (!bvrf->bg_ev[5] && bvrf->bg_echov6 != -1) |
29397ec1 RZ |
2077 | thread_add_read(master, bfd_recv_cb, bvrf, |
2078 | bvrf->bg_echov6, &bvrf->bg_ev[5]); | |
30c5d21e | 2079 | } |
d24af713 | 2080 | if (vrf->vrf_id != VRF_DEFAULT) { |
54aadda1 | 2081 | bfdd_zclient_register(vrf->vrf_id); |
d24af713 PG |
2082 | bfdd_sessions_enable_vrf(vrf); |
2083 | } | |
9fc0bc5c PG |
2084 | return 0; |
2085 | } | |
2086 | ||
2087 | static int bfd_vrf_disable(struct vrf *vrf) | |
2088 | { | |
7bcadbae PG |
2089 | struct bfd_vrf_global *bvrf; |
2090 | ||
2091 | if (!vrf->info) | |
9fc0bc5c | 2092 | return 0; |
7bcadbae | 2093 | bvrf = vrf->info; |
54aadda1 | 2094 | |
d24af713 PG |
2095 | if (vrf->vrf_id != VRF_DEFAULT) { |
2096 | bfdd_sessions_disable_vrf(vrf); | |
54aadda1 | 2097 | bfdd_zclient_unregister(vrf->vrf_id); |
d24af713 | 2098 | } |
54aadda1 | 2099 | |
48da2c31 RZ |
2100 | if (bglobal.debug_zebra) |
2101 | zlog_debug("VRF disable %s id %d", vrf->name, vrf->vrf_id); | |
507d75d4 RZ |
2102 | |
2103 | /* Disable read/write poll triggering. */ | |
2104 | THREAD_OFF(bvrf->bg_ev[0]); | |
2105 | THREAD_OFF(bvrf->bg_ev[1]); | |
2106 | THREAD_OFF(bvrf->bg_ev[2]); | |
2107 | THREAD_OFF(bvrf->bg_ev[3]); | |
2108 | THREAD_OFF(bvrf->bg_ev[4]); | |
2109 | THREAD_OFF(bvrf->bg_ev[5]); | |
2110 | ||
7bcadbae PG |
2111 | /* Close all descriptors. */ |
2112 | socket_close(&bvrf->bg_echo); | |
2113 | socket_close(&bvrf->bg_shop); | |
2114 | socket_close(&bvrf->bg_mhop); | |
f1446f98 DS |
2115 | if (bvrf->bg_shop6 != -1) |
2116 | socket_close(&bvrf->bg_shop6); | |
2117 | if (bvrf->bg_mhop6 != -1) | |
2118 | socket_close(&bvrf->bg_mhop6); | |
8cf3c217 | 2119 | socket_close(&bvrf->bg_echo); |
f1446f98 DS |
2120 | if (bvrf->bg_echov6 != -1) |
2121 | socket_close(&bvrf->bg_echov6); | |
7bcadbae PG |
2122 | |
2123 | /* free context */ | |
2124 | XFREE(MTYPE_BFDD_VRF, bvrf); | |
2125 | vrf->info = NULL; | |
2126 | ||
9fc0bc5c PG |
2127 | return 0; |
2128 | } | |
2129 | ||
2130 | void bfd_vrf_init(void) | |
2131 | { | |
2132 | vrf_init(bfd_vrf_new, bfd_vrf_enable, bfd_vrf_disable, | |
43ba41c1 | 2133 | bfd_vrf_delete, bfd_vrf_update); |
9fc0bc5c PG |
2134 | } |
2135 | ||
7bcadbae PG |
2136 | void bfd_vrf_terminate(void) |
2137 | { | |
2138 | vrf_terminate(); | |
2139 | } | |
2140 | ||
2141 | struct bfd_vrf_global *bfd_vrf_look_by_session(struct bfd_session *bfd) | |
2142 | { | |
2143 | struct vrf *vrf; | |
2144 | ||
2145 | if (!vrf_is_backend_netns()) { | |
2146 | vrf = vrf_lookup_by_id(VRF_DEFAULT); | |
2147 | if (vrf) | |
2148 | return (struct bfd_vrf_global *)vrf->info; | |
2149 | return NULL; | |
2150 | } | |
2151 | if (!bfd) | |
2152 | return NULL; | |
2153 | if (!bfd->vrf) | |
2154 | return NULL; | |
2155 | return bfd->vrf->info; | |
2156 | } | |
f06e248c PG |
2157 | |
2158 | void bfd_session_update_vrf_name(struct bfd_session *bs, struct vrf *vrf) | |
2159 | { | |
2160 | if (!vrf || !bs) | |
2161 | return; | |
2162 | /* update key */ | |
2163 | hash_release(bfd_key_hash, bs); | |
955d3ad8 PG |
2164 | /* |
2165 | * HACK: Change the BFD VRF in the running configuration directly, | |
2166 | * bypassing the northbound layer. This is necessary to avoid deleting | |
2167 | * the BFD and readding it in the new VRF, which would have | |
2168 | * several implications. | |
2169 | */ | |
2170 | if (yang_module_find("frr-bfdd") && bs->key.vrfname[0]) { | |
2171 | struct lyd_node *bfd_dnode; | |
2172 | char xpath[XPATH_MAXLEN], xpath_srcaddr[XPATH_MAXLEN + 32]; | |
3704ff56 | 2173 | char oldpath[XPATH_MAXLEN], newpath[XPATH_MAXLEN]; |
955d3ad8 PG |
2174 | char addr_buf[INET6_ADDRSTRLEN]; |
2175 | int slen; | |
2176 | ||
2177 | /* build xpath */ | |
2178 | if (bs->key.mhop) { | |
2179 | inet_ntop(bs->key.family, &bs->key.local, addr_buf, sizeof(addr_buf)); | |
2180 | snprintf(xpath_srcaddr, sizeof(xpath_srcaddr), "[source-addr='%s']", | |
2181 | addr_buf); | |
2182 | } else | |
2183 | xpath_srcaddr[0] = 0; | |
2184 | inet_ntop(bs->key.family, &bs->key.peer, addr_buf, sizeof(addr_buf)); | |
2185 | slen = snprintf(xpath, sizeof(xpath), | |
2186 | "/frr-bfdd:bfdd/bfd/sessions/%s%s[dest-addr='%s']", | |
2187 | bs->key.mhop ? "multi-hop" : "single-hop", xpath_srcaddr, | |
2188 | addr_buf); | |
2189 | if (bs->key.ifname[0]) | |
2190 | slen += snprintf(xpath + slen, sizeof(xpath) - slen, | |
2191 | "[interface='%s']", bs->key.ifname); | |
2192 | else | |
2193 | slen += snprintf(xpath + slen, sizeof(xpath) - slen, | |
4ec8e74b | 2194 | "[interface='*']"); |
955d3ad8 PG |
2195 | snprintf(xpath + slen, sizeof(xpath) - slen, "[vrf='%s']/vrf", |
2196 | bs->key.vrfname); | |
2197 | ||
8685be73 RW |
2198 | bfd_dnode = yang_dnode_get(running_config->dnode, xpath, |
2199 | bs->key.vrfname); | |
2200 | if (bfd_dnode) { | |
3704ff56 IR |
2201 | yang_dnode_get_path(bfd_dnode->parent, oldpath, |
2202 | sizeof(oldpath)); | |
8685be73 | 2203 | yang_dnode_change_leaf(bfd_dnode, vrf->name); |
3704ff56 IR |
2204 | yang_dnode_get_path(bfd_dnode->parent, newpath, |
2205 | sizeof(newpath)); | |
2206 | nb_running_move_tree(oldpath, newpath); | |
8685be73 | 2207 | running_config->version++; |
955d3ad8 PG |
2208 | } |
2209 | } | |
f06e248c PG |
2210 | memset(bs->key.vrfname, 0, sizeof(bs->key.vrfname)); |
2211 | strlcpy(bs->key.vrfname, vrf->name, sizeof(bs->key.vrfname)); | |
2212 | hash_get(bfd_key_hash, bs, hash_alloc_intern); | |
2213 | } | |
fa6e709f S |
2214 | |
2215 | unsigned long bfd_get_session_count(void) | |
2216 | { | |
2217 | return bfd_key_hash->count; | |
2218 | } |