]>
Commit | Line | Data |
---|---|---|
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 RZ |
30 | #include "lib/jhash.h" |
31 | ||
32 | #include "bfd.h" | |
33 | ||
1b88c3cb DL |
34 | DEFINE_MTYPE_STATIC(BFDD, BFDD_CONFIG, "long-lived configuration memory") |
35 | DEFINE_MTYPE_STATIC(BFDD, BFDD_SESSION_OBSERVER, "Session observer") | |
36 | DEFINE_MTYPE_STATIC(BFDD, BFDD_VRF, "BFD VRF") | |
37 | DEFINE_QOBJ_TYPE(bfd_session) | |
e9e2c950 RZ |
38 | |
39 | /* | |
40 | * Prototypes | |
41 | */ | |
79b4a6fc RZ |
42 | void gen_bfd_key(struct bfd_key *key, struct sockaddr_any *peer, |
43 | struct sockaddr_any *local, bool mhop, const char *ifname, | |
44 | const char *vrfname); | |
d245e522 | 45 | |
e9e2c950 RZ |
46 | static uint32_t ptm_bfd_gen_ID(void); |
47 | static void ptm_bfd_echo_xmt_TO(struct bfd_session *bfd); | |
48 | static void bfd_session_free(struct bfd_session *bs); | |
d245e522 | 49 | static struct bfd_session *bfd_session_new(void); |
e9e2c950 RZ |
50 | static struct bfd_session *bfd_find_disc(struct sockaddr_any *sa, |
51 | uint32_t ldisc); | |
52 | static int bfd_session_update(struct bfd_session *bs, struct bfd_peer_cfg *bpc); | |
53 | static const char *get_diag_str(int diag); | |
54 | ||
9f37770f RZ |
55 | static void bs_admin_down_handler(struct bfd_session *bs, int nstate); |
56 | static void bs_down_handler(struct bfd_session *bs, int nstate); | |
57 | static void bs_init_handler(struct bfd_session *bs, int nstate); | |
58 | static void bs_up_handler(struct bfd_session *bs, int nstate); | |
59 | ||
79b4a6fc RZ |
60 | /* Zeroed array with the size of an IPv6 address. */ |
61 | struct in6_addr zero_addr; | |
e9e2c950 RZ |
62 | |
63 | /* | |
64 | * Functions | |
65 | */ | |
79b4a6fc RZ |
66 | void gen_bfd_key(struct bfd_key *key, struct sockaddr_any *peer, |
67 | struct sockaddr_any *local, bool mhop, const char *ifname, | |
68 | const char *vrfname) | |
d245e522 | 69 | { |
79b4a6fc | 70 | memset(key, 0, sizeof(*key)); |
d245e522 | 71 | |
79b4a6fc RZ |
72 | switch (peer->sa_sin.sin_family) { |
73 | case AF_INET: | |
74 | key->family = AF_INET; | |
75 | memcpy(&key->peer, &peer->sa_sin.sin_addr, | |
76 | sizeof(peer->sa_sin.sin_addr)); | |
77 | memcpy(&key->local, &local->sa_sin.sin_addr, | |
78 | sizeof(local->sa_sin.sin_addr)); | |
79 | break; | |
80 | case AF_INET6: | |
81 | key->family = AF_INET6; | |
82 | memcpy(&key->peer, &peer->sa_sin6.sin6_addr, | |
83 | sizeof(peer->sa_sin6.sin6_addr)); | |
84 | memcpy(&key->local, &local->sa_sin6.sin6_addr, | |
85 | sizeof(local->sa_sin6.sin6_addr)); | |
d245e522 RZ |
86 | break; |
87 | } | |
d245e522 | 88 | |
79b4a6fc RZ |
89 | key->mhop = mhop; |
90 | if (ifname && ifname[0]) | |
91 | strlcpy(key->ifname, ifname, sizeof(key->ifname)); | |
92 | if (vrfname && vrfname[0]) | |
93 | strlcpy(key->vrfname, vrfname, sizeof(key->vrfname)); | |
d245e522 RZ |
94 | } |
95 | ||
e9e2c950 RZ |
96 | struct bfd_session *bs_peer_find(struct bfd_peer_cfg *bpc) |
97 | { | |
98 | struct bfd_session *bs; | |
99 | struct peer_label *pl; | |
79b4a6fc | 100 | struct bfd_key key; |
e9e2c950 RZ |
101 | |
102 | /* Try to find label first. */ | |
103 | if (bpc->bpc_has_label) { | |
104 | pl = pl_find(bpc->bpc_label); | |
105 | if (pl != NULL) { | |
106 | bs = pl->pl_bs; | |
107 | return bs; | |
108 | } | |
109 | } | |
110 | ||
111 | /* Otherwise fallback to peer/local hash lookup. */ | |
79b4a6fc RZ |
112 | gen_bfd_key(&key, &bpc->bpc_peer, &bpc->bpc_local, bpc->bpc_mhop, |
113 | bpc->bpc_localif, bpc->bpc_vrfname); | |
e9e2c950 | 114 | |
79b4a6fc | 115 | return bfd_key_lookup(key); |
d245e522 RZ |
116 | } |
117 | ||
118 | /* | |
119 | * Starts a disabled BFD session. | |
120 | * | |
121 | * A session is disabled when the specified interface/VRF doesn't exist | |
122 | * yet. It might happen on FRR boot or with virtual interfaces. | |
123 | */ | |
124 | int bfd_session_enable(struct bfd_session *bs) | |
125 | { | |
d245e522 RZ |
126 | struct interface *ifp = NULL; |
127 | struct vrf *vrf = NULL; | |
128 | int psock; | |
129 | ||
130 | /* | |
131 | * If the interface or VRF doesn't exist, then we must register | |
132 | * the session but delay its start. | |
133 | */ | |
218afa36 PG |
134 | if (bs->key.vrfname[0]) { |
135 | vrf = vrf_lookup_by_name(bs->key.vrfname); | |
d245e522 | 136 | if (vrf == NULL) { |
79b4a6fc RZ |
137 | log_error( |
138 | "session-enable: specified VRF doesn't exists."); | |
d245e522 RZ |
139 | return 0; |
140 | } | |
141 | } | |
142 | ||
218afa36 PG |
143 | if (bs->key.ifname[0]) { |
144 | if (vrf) | |
a36898e7 | 145 | ifp = if_lookup_by_name(bs->key.ifname, vrf->vrf_id); |
218afa36 PG |
146 | else |
147 | ifp = if_lookup_by_name_all_vrf(bs->key.ifname); | |
148 | if (ifp == NULL) { | |
79b4a6fc | 149 | log_error( |
218afa36 | 150 | "session-enable: specified interface doesn't exists."); |
d245e522 RZ |
151 | return 0; |
152 | } | |
218afa36 | 153 | if (bs->key.ifname[0] && !vrf) { |
a36898e7 | 154 | vrf = vrf_lookup_by_id(ifp->vrf_id); |
218afa36 PG |
155 | if (vrf == NULL) { |
156 | log_error( | |
157 | "session-enable: specified VRF doesn't exists."); | |
158 | return 0; | |
159 | } | |
160 | } | |
d245e522 RZ |
161 | } |
162 | ||
163 | /* Assign interface/VRF pointers. */ | |
164 | bs->vrf = vrf; | |
165 | if (bs->vrf == NULL) | |
166 | bs->vrf = vrf_lookup_by_id(VRF_DEFAULT); | |
167 | ||
79b4a6fc RZ |
168 | if (bs->key.ifname[0] |
169 | && BFD_CHECK_FLAG(bs->flags, BFD_SESS_FLAG_MH) == 0) | |
d245e522 RZ |
170 | bs->ifp = ifp; |
171 | ||
261e0ba9 RZ |
172 | /* Sanity check: don't leak open sockets. */ |
173 | if (bs->sock != -1) { | |
1ac865e7 | 174 | log_debug("session-enable: previous socket open"); |
261e0ba9 RZ |
175 | close(bs->sock); |
176 | bs->sock = -1; | |
177 | } | |
178 | ||
d245e522 RZ |
179 | /* |
180 | * Get socket for transmitting control packets. Note that if we | |
181 | * could use the destination port (3784) for the source | |
182 | * port we wouldn't need a socket per session. | |
183 | */ | |
184 | if (BFD_CHECK_FLAG(bs->flags, BFD_SESS_FLAG_IPV6) == 0) { | |
185 | psock = bp_peer_socket(bs); | |
186 | if (psock == -1) | |
261e0ba9 | 187 | return 0; |
d245e522 RZ |
188 | } else { |
189 | psock = bp_peer_socketv6(bs); | |
190 | if (psock == -1) | |
261e0ba9 | 191 | return 0; |
d245e522 RZ |
192 | } |
193 | ||
194 | /* | |
195 | * We've got a valid socket, lets start the timers and the | |
196 | * protocol. | |
197 | */ | |
198 | bs->sock = psock; | |
199 | bfd_recvtimer_update(bs); | |
200 | ptm_bfd_start_xmt_timer(bs, false); | |
201 | ||
d245e522 RZ |
202 | return 0; |
203 | } | |
204 | ||
205 | /* | |
206 | * Disabled a running BFD session. | |
207 | * | |
208 | * A session is disabled when the specified interface/VRF gets removed | |
209 | * (e.g. virtual interfaces). | |
210 | */ | |
211 | void bfd_session_disable(struct bfd_session *bs) | |
212 | { | |
213 | /* Free up socket resources. */ | |
214 | if (bs->sock != -1) { | |
215 | close(bs->sock); | |
216 | bs->sock = -1; | |
217 | } | |
218 | ||
219 | /* Disable all timers. */ | |
220 | bfd_recvtimer_delete(bs); | |
221 | bfd_echo_recvtimer_delete(bs); | |
222 | bfd_xmttimer_delete(bs); | |
223 | bfd_echo_xmttimer_delete(bs); | |
e9e2c950 RZ |
224 | } |
225 | ||
226 | static uint32_t ptm_bfd_gen_ID(void) | |
227 | { | |
843b324d | 228 | uint32_t session_id; |
e9e2c950 | 229 | |
843b324d RZ |
230 | /* |
231 | * RFC 5880, Section 6.8.1. recommends that we should generate | |
232 | * random session identification numbers. | |
233 | */ | |
234 | do { | |
235 | session_id = ((random() << 16) & 0xFFFF0000) | |
236 | | (random() & 0x0000FFFF); | |
237 | } while (session_id == 0 || bfd_id_lookup(session_id) != NULL); | |
238 | ||
239 | return session_id; | |
e9e2c950 RZ |
240 | } |
241 | ||
242 | void ptm_bfd_start_xmt_timer(struct bfd_session *bfd, bool is_echo) | |
243 | { | |
244 | uint64_t jitter, xmt_TO; | |
245 | int maxpercent; | |
246 | ||
247 | xmt_TO = is_echo ? bfd->echo_xmt_TO : bfd->xmt_TO; | |
248 | ||
249 | /* | |
250 | * From section 6.5.2: trasmit interval should be randomly jittered | |
251 | * between | |
252 | * 75% and 100% of nominal value, unless detect_mult is 1, then should | |
253 | * be | |
254 | * between 75% and 90%. | |
255 | */ | |
256 | maxpercent = (bfd->detect_mult == 1) ? 16 : 26; | |
257 | jitter = (xmt_TO * (75 + (random() % maxpercent))) / 100; | |
258 | /* XXX remove that division above */ | |
259 | ||
260 | if (is_echo) | |
261 | bfd_echo_xmttimer_update(bfd, jitter); | |
262 | else | |
263 | bfd_xmttimer_update(bfd, jitter); | |
264 | } | |
265 | ||
266 | static void ptm_bfd_echo_xmt_TO(struct bfd_session *bfd) | |
267 | { | |
268 | /* Send the scheduled echo packet */ | |
269 | ptm_bfd_echo_snd(bfd); | |
270 | ||
271 | /* Restart the timer for next time */ | |
272 | ptm_bfd_start_xmt_timer(bfd, true); | |
273 | } | |
274 | ||
275 | void ptm_bfd_xmt_TO(struct bfd_session *bfd, int fbit) | |
276 | { | |
277 | /* Send the scheduled control packet */ | |
278 | ptm_bfd_snd(bfd, fbit); | |
279 | ||
280 | /* Restart the timer for next time */ | |
281 | ptm_bfd_start_xmt_timer(bfd, false); | |
282 | } | |
283 | ||
8bd859f6 | 284 | void ptm_bfd_echo_stop(struct bfd_session *bfd) |
e9e2c950 RZ |
285 | { |
286 | bfd->echo_xmt_TO = 0; | |
287 | bfd->echo_detect_TO = 0; | |
288 | BFD_UNSET_FLAG(bfd->flags, BFD_SESS_FLAG_ECHO_ACTIVE); | |
289 | ||
290 | bfd_echo_xmttimer_delete(bfd); | |
291 | bfd_echo_recvtimer_delete(bfd); | |
e9e2c950 RZ |
292 | } |
293 | ||
294 | void ptm_bfd_echo_start(struct bfd_session *bfd) | |
295 | { | |
296 | bfd->echo_detect_TO = (bfd->remote_detect_mult * bfd->echo_xmt_TO); | |
451eb5a2 RZ |
297 | if (bfd->echo_detect_TO > 0) |
298 | ptm_bfd_echo_xmt_TO(bfd); | |
e9e2c950 RZ |
299 | } |
300 | ||
bc50bcc8 | 301 | void ptm_bfd_sess_up(struct bfd_session *bfd) |
e9e2c950 | 302 | { |
03e7f088 RZ |
303 | int old_state = bfd->ses_state; |
304 | ||
e9e2c950 RZ |
305 | bfd->local_diag = 0; |
306 | bfd->ses_state = PTM_BFD_UP; | |
e9e2c950 RZ |
307 | monotime(&bfd->uptime); |
308 | ||
c0ef9a8a RZ |
309 | /* Connection is up, lets negotiate timers. */ |
310 | bfd_set_polling(bfd); | |
311 | ||
312 | /* Start sending control packets with poll bit immediately. */ | |
313 | ptm_bfd_snd(bfd, 0); | |
e9e2c950 RZ |
314 | |
315 | control_notify(bfd); | |
316 | ||
0684c9b1 RZ |
317 | if (old_state != bfd->ses_state) { |
318 | bfd->stats.session_up++; | |
03e7f088 RZ |
319 | log_info("state-change: [%s] %s -> %s", bs_to_string(bfd), |
320 | state_list[old_state].str, | |
321 | state_list[bfd->ses_state].str); | |
0684c9b1 | 322 | } |
e9e2c950 RZ |
323 | } |
324 | ||
bc50bcc8 | 325 | void ptm_bfd_sess_dn(struct bfd_session *bfd, uint8_t diag) |
e9e2c950 RZ |
326 | { |
327 | int old_state = bfd->ses_state; | |
328 | ||
329 | bfd->local_diag = diag; | |
330 | bfd->discrs.remote_discr = 0; | |
331 | bfd->ses_state = PTM_BFD_DOWN; | |
332 | bfd->polling = 0; | |
333 | bfd->demand_mode = 0; | |
334 | monotime(&bfd->downtime); | |
335 | ||
336 | ptm_bfd_snd(bfd, 0); | |
337 | ||
b912b189 RZ |
338 | /* Slow down the control packets, the connection is down. */ |
339 | bs_set_slow_timers(bfd); | |
340 | ||
e9e2c950 RZ |
341 | /* only signal clients when going from up->down state */ |
342 | if (old_state == PTM_BFD_UP) | |
343 | control_notify(bfd); | |
344 | ||
e9e2c950 RZ |
345 | /* Stop echo packet transmission if they are active */ |
346 | if (BFD_CHECK_FLAG(bfd->flags, BFD_SESS_FLAG_ECHO_ACTIVE)) | |
8bd859f6 | 347 | ptm_bfd_echo_stop(bfd); |
03e7f088 | 348 | |
0684c9b1 RZ |
349 | if (old_state != bfd->ses_state) { |
350 | bfd->stats.session_down++; | |
03e7f088 RZ |
351 | log_info("state-change: [%s] %s -> %s reason:%s", |
352 | bs_to_string(bfd), state_list[old_state].str, | |
353 | state_list[bfd->ses_state].str, | |
354 | get_diag_str(bfd->local_diag)); | |
0684c9b1 | 355 | } |
e9e2c950 RZ |
356 | } |
357 | ||
e9e2c950 RZ |
358 | static struct bfd_session *bfd_find_disc(struct sockaddr_any *sa, |
359 | uint32_t ldisc) | |
360 | { | |
361 | struct bfd_session *bs; | |
362 | ||
363 | bs = bfd_id_lookup(ldisc); | |
364 | if (bs == NULL) | |
365 | return NULL; | |
366 | ||
79b4a6fc | 367 | switch (bs->key.family) { |
e9e2c950 | 368 | case AF_INET: |
79b4a6fc RZ |
369 | if (memcmp(&sa->sa_sin.sin_addr, &bs->key.peer, |
370 | sizeof(sa->sa_sin.sin_addr))) | |
371 | return NULL; | |
e9e2c950 RZ |
372 | break; |
373 | case AF_INET6: | |
79b4a6fc RZ |
374 | if (memcmp(&sa->sa_sin6.sin6_addr, &bs->key.peer, |
375 | sizeof(sa->sa_sin6.sin6_addr))) | |
376 | return NULL; | |
e9e2c950 RZ |
377 | break; |
378 | } | |
379 | ||
79b4a6fc | 380 | return bs; |
e9e2c950 RZ |
381 | } |
382 | ||
b333abc2 | 383 | struct bfd_session *ptm_bfd_sess_find(struct bfd_pkt *cp, |
e9e2c950 RZ |
384 | struct sockaddr_any *peer, |
385 | struct sockaddr_any *local, | |
b333abc2 RZ |
386 | ifindex_t ifindex, vrf_id_t vrfid, |
387 | bool is_mhop) | |
e9e2c950 | 388 | { |
79b4a6fc RZ |
389 | struct interface *ifp; |
390 | struct vrf *vrf; | |
391 | struct bfd_key key; | |
e9e2c950 | 392 | |
9d63adda RZ |
393 | /* Find our session using the ID signaled by the remote end. */ |
394 | if (cp->discrs.remote_discr) | |
395 | return bfd_find_disc(peer, ntohl(cp->discrs.remote_discr)); | |
396 | ||
397 | /* Search for session without using discriminator. */ | |
79b4a6fc RZ |
398 | ifp = if_lookup_by_index(ifindex, vrfid); |
399 | if (vrfid == VRF_DEFAULT) { | |
400 | /* | |
401 | * Don't use the default vrf, otherwise we won't find | |
402 | * sessions that doesn't specify it. | |
403 | */ | |
404 | vrf = NULL; | |
405 | } else | |
406 | vrf = vrf_lookup_by_id(vrfid); | |
9d63adda | 407 | |
79b4a6fc RZ |
408 | gen_bfd_key(&key, peer, local, is_mhop, ifp ? ifp->name : NULL, |
409 | vrf ? vrf->name : NULL); | |
e9e2c950 | 410 | |
9d63adda | 411 | /* XXX maybe remoteDiscr should be checked for remoteHeard cases. */ |
79b4a6fc | 412 | return bfd_key_lookup(key); |
e9e2c950 RZ |
413 | } |
414 | ||
e9e2c950 RZ |
415 | int bfd_xmt_cb(struct thread *t) |
416 | { | |
417 | struct bfd_session *bs = THREAD_ARG(t); | |
418 | ||
419 | ptm_bfd_xmt_TO(bs, 0); | |
420 | ||
421 | return 0; | |
422 | } | |
423 | ||
424 | int bfd_echo_xmt_cb(struct thread *t) | |
425 | { | |
426 | struct bfd_session *bs = THREAD_ARG(t); | |
427 | ||
451eb5a2 RZ |
428 | if (bs->echo_xmt_TO > 0) |
429 | ptm_bfd_echo_xmt_TO(bs); | |
e9e2c950 RZ |
430 | |
431 | return 0; | |
432 | } | |
433 | ||
434 | /* Was ptm_bfd_detect_TO() */ | |
435 | int bfd_recvtimer_cb(struct thread *t) | |
436 | { | |
437 | struct bfd_session *bs = THREAD_ARG(t); | |
e9e2c950 RZ |
438 | |
439 | switch (bs->ses_state) { | |
440 | case PTM_BFD_INIT: | |
441 | case PTM_BFD_UP: | |
bc50bcc8 | 442 | ptm_bfd_sess_dn(bs, BD_CONTROL_EXPIRED); |
e9e2c950 RZ |
443 | bfd_recvtimer_update(bs); |
444 | break; | |
445 | ||
446 | default: | |
447 | /* Second detect time expiration, zero remote discr (section | |
448 | * 6.5.1) | |
449 | */ | |
450 | bs->discrs.remote_discr = 0; | |
451 | break; | |
452 | } | |
453 | ||
e9e2c950 RZ |
454 | return 0; |
455 | } | |
456 | ||
457 | /* Was ptm_bfd_echo_detect_TO() */ | |
458 | int bfd_echo_recvtimer_cb(struct thread *t) | |
459 | { | |
460 | struct bfd_session *bs = THREAD_ARG(t); | |
e9e2c950 RZ |
461 | |
462 | switch (bs->ses_state) { | |
463 | case PTM_BFD_INIT: | |
464 | case PTM_BFD_UP: | |
bc50bcc8 | 465 | ptm_bfd_sess_dn(bs, BD_ECHO_FAILED); |
e9e2c950 RZ |
466 | break; |
467 | } | |
468 | ||
e9e2c950 RZ |
469 | return 0; |
470 | } | |
471 | ||
d245e522 | 472 | static struct bfd_session *bfd_session_new(void) |
e9e2c950 RZ |
473 | { |
474 | struct bfd_session *bs; | |
475 | ||
476 | bs = XCALLOC(MTYPE_BFDD_CONFIG, sizeof(*bs)); | |
e9e2c950 RZ |
477 | |
478 | QOBJ_REG(bs, bfd_session); | |
479 | ||
f43b9368 | 480 | bs->timers.desired_min_tx = BFD_DEFDESIREDMINTX; |
e9e2c950 RZ |
481 | bs->timers.required_min_rx = BFD_DEFREQUIREDMINRX; |
482 | bs->timers.required_min_echo = BFD_DEF_REQ_MIN_ECHO; | |
483 | bs->detect_mult = BFD_DEFDETECTMULT; | |
484 | bs->mh_ttl = BFD_DEF_MHOP_TTL; | |
d245e522 | 485 | bs->ses_state = PTM_BFD_DOWN; |
e9e2c950 | 486 | |
b912b189 RZ |
487 | /* Initiate connection with slow timers. */ |
488 | bs_set_slow_timers(bs); | |
f43b9368 RZ |
489 | |
490 | /* Initiate remote settings as well. */ | |
491 | bs->remote_timers = bs->cur_timers; | |
492 | bs->remote_detect_mult = BFD_DEFDETECTMULT; | |
493 | ||
d245e522 | 494 | bs->sock = -1; |
e9e2c950 RZ |
495 | monotime(&bs->uptime); |
496 | bs->downtime = bs->uptime; | |
497 | ||
498 | return bs; | |
499 | } | |
500 | ||
501 | int bfd_session_update_label(struct bfd_session *bs, const char *nlabel) | |
502 | { | |
503 | /* New label treatment: | |
504 | * - Check if the label is taken; | |
505 | * - Try to allocate the memory for it and register; | |
506 | */ | |
507 | if (bs->pl == NULL) { | |
508 | if (pl_find(nlabel) != NULL) { | |
509 | /* Someone is already using it. */ | |
510 | return -1; | |
511 | } | |
512 | ||
513 | if (pl_new(nlabel, bs) == NULL) | |
514 | return -1; | |
515 | ||
516 | return 0; | |
517 | } | |
518 | ||
519 | /* | |
520 | * Test label change consistency: | |
521 | * - Do nothing if it's the same label; | |
522 | * - Check if the future label is already taken; | |
523 | * - Change label; | |
524 | */ | |
525 | if (strcmp(nlabel, bs->pl->pl_label) == 0) | |
526 | return -1; | |
527 | if (pl_find(nlabel) != NULL) | |
528 | return -1; | |
529 | ||
530 | strlcpy(bs->pl->pl_label, nlabel, sizeof(bs->pl->pl_label)); | |
531 | return 0; | |
532 | } | |
533 | ||
534 | static void _bfd_session_update(struct bfd_session *bs, | |
535 | struct bfd_peer_cfg *bpc) | |
536 | { | |
537 | if (bpc->bpc_echo) { | |
538 | /* Check if echo mode is already active. */ | |
539 | if (BFD_CHECK_FLAG(bs->flags, BFD_SESS_FLAG_ECHO)) | |
540 | goto skip_echo; | |
541 | ||
542 | BFD_SET_FLAG(bs->flags, BFD_SESS_FLAG_ECHO); | |
e9e2c950 RZ |
543 | |
544 | /* Activate/update echo receive timeout timer. */ | |
73c62f8e | 545 | bs_echo_timer_handler(bs); |
e9e2c950 RZ |
546 | } else { |
547 | /* Check if echo mode is already disabled. */ | |
548 | if (!BFD_CHECK_FLAG(bs->flags, BFD_SESS_FLAG_ECHO)) | |
549 | goto skip_echo; | |
550 | ||
551 | BFD_UNSET_FLAG(bs->flags, BFD_SESS_FLAG_ECHO); | |
8bd859f6 | 552 | ptm_bfd_echo_stop(bs); |
e9e2c950 RZ |
553 | } |
554 | ||
555 | skip_echo: | |
556 | if (bpc->bpc_has_txinterval) | |
f43b9368 | 557 | bs->timers.desired_min_tx = bpc->bpc_txinterval * 1000; |
e9e2c950 RZ |
558 | |
559 | if (bpc->bpc_has_recvinterval) | |
560 | bs->timers.required_min_rx = bpc->bpc_recvinterval * 1000; | |
561 | ||
562 | if (bpc->bpc_has_detectmultiplier) | |
563 | bs->detect_mult = bpc->bpc_detectmultiplier; | |
564 | ||
565 | if (bpc->bpc_has_echointerval) | |
566 | bs->timers.required_min_echo = bpc->bpc_echointerval * 1000; | |
567 | ||
568 | if (bpc->bpc_has_label) | |
569 | bfd_session_update_label(bs, bpc->bpc_label); | |
570 | ||
571 | if (bpc->bpc_shutdown) { | |
572 | /* Check if already shutdown. */ | |
573 | if (BFD_CHECK_FLAG(bs->flags, BFD_SESS_FLAG_SHUTDOWN)) | |
574 | return; | |
575 | ||
576 | BFD_SET_FLAG(bs->flags, BFD_SESS_FLAG_SHUTDOWN); | |
577 | ||
578 | /* Disable all events. */ | |
579 | bfd_recvtimer_delete(bs); | |
580 | bfd_echo_recvtimer_delete(bs); | |
581 | bfd_xmttimer_delete(bs); | |
582 | bfd_echo_xmttimer_delete(bs); | |
583 | ||
584 | /* Change and notify state change. */ | |
585 | bs->ses_state = PTM_BFD_ADM_DOWN; | |
586 | control_notify(bs); | |
587 | ||
d245e522 RZ |
588 | /* Don't try to send packets with a disabled session. */ |
589 | if (bs->sock != -1) | |
590 | ptm_bfd_snd(bs, 0); | |
e9e2c950 RZ |
591 | } else { |
592 | /* Check if already working. */ | |
593 | if (!BFD_CHECK_FLAG(bs->flags, BFD_SESS_FLAG_SHUTDOWN)) | |
594 | return; | |
595 | ||
596 | BFD_UNSET_FLAG(bs->flags, BFD_SESS_FLAG_SHUTDOWN); | |
597 | ||
598 | /* Change and notify state change. */ | |
599 | bs->ses_state = PTM_BFD_DOWN; | |
600 | control_notify(bs); | |
601 | ||
602 | /* Enable all timers. */ | |
603 | bfd_recvtimer_update(bs); | |
604 | bfd_xmttimer_update(bs, bs->xmt_TO); | |
e9e2c950 | 605 | } |
9beff0bd PG |
606 | if (bpc->bpc_cbit) { |
607 | if (BFD_CHECK_FLAG(bs->flags, BFD_SESS_FLAG_CBIT)) | |
608 | return; | |
609 | ||
610 | BFD_SET_FLAG(bs->flags, BFD_SESS_FLAG_CBIT); | |
611 | } else { | |
612 | if (!BFD_CHECK_FLAG(bs->flags, BFD_SESS_FLAG_CBIT)) | |
613 | return; | |
614 | ||
615 | BFD_UNSET_FLAG(bs->flags, BFD_SESS_FLAG_CBIT); | |
616 | } | |
e9e2c950 RZ |
617 | } |
618 | ||
619 | static int bfd_session_update(struct bfd_session *bs, struct bfd_peer_cfg *bpc) | |
620 | { | |
621 | /* User didn't want to update, return failure. */ | |
622 | if (bpc->bpc_createonly) | |
623 | return -1; | |
624 | ||
625 | _bfd_session_update(bs, bpc); | |
626 | ||
e9e2c950 RZ |
627 | control_notify_config(BCM_NOTIFY_CONFIG_UPDATE, bs); |
628 | ||
629 | return 0; | |
630 | } | |
631 | ||
632 | static void bfd_session_free(struct bfd_session *bs) | |
633 | { | |
d245e522 | 634 | struct bfd_session_observer *bso; |
e9e2c950 | 635 | |
d245e522 | 636 | bfd_session_disable(bs); |
e9e2c950 | 637 | |
79b4a6fc RZ |
638 | bfd_key_delete(bs->key); |
639 | bfd_id_delete(bs->discrs.my_discr); | |
640 | ||
d245e522 RZ |
641 | /* Remove observer if any. */ |
642 | TAILQ_FOREACH(bso, &bglobal.bg_obslist, bso_entry) { | |
643 | if (bso->bso_bs != bs) | |
644 | continue; | |
645 | ||
646 | break; | |
647 | } | |
648 | if (bso != NULL) | |
649 | bs_observer_del(bso); | |
e9e2c950 RZ |
650 | |
651 | pl_free(bs->pl); | |
652 | ||
653 | QOBJ_UNREG(bs); | |
654 | XFREE(MTYPE_BFDD_CONFIG, bs); | |
655 | } | |
656 | ||
657 | struct bfd_session *ptm_bfd_sess_new(struct bfd_peer_cfg *bpc) | |
658 | { | |
659 | struct bfd_session *bfd, *l_bfd; | |
e9e2c950 RZ |
660 | |
661 | /* check to see if this needs a new session */ | |
662 | l_bfd = bs_peer_find(bpc); | |
663 | if (l_bfd) { | |
664 | /* Requesting a duplicated peer means update configuration. */ | |
665 | if (bfd_session_update(l_bfd, bpc) == 0) | |
666 | return l_bfd; | |
667 | else | |
668 | return NULL; | |
669 | } | |
670 | ||
d245e522 RZ |
671 | /* Get BFD session storage with its defaults. */ |
672 | bfd = bfd_session_new(); | |
e9e2c950 | 673 | if (bfd == NULL) { |
03e7f088 | 674 | log_error("session-new: allocation failed"); |
e9e2c950 RZ |
675 | return NULL; |
676 | } | |
677 | ||
d245e522 RZ |
678 | /* |
679 | * Store interface/VRF name in case we need to delay session | |
680 | * start. See `bfd_session_enable` for more information. | |
681 | */ | |
682 | if (bpc->bpc_has_localif) | |
79b4a6fc RZ |
683 | strlcpy(bfd->key.ifname, bpc->bpc_localif, |
684 | sizeof(bfd->key.ifname)); | |
e9e2c950 | 685 | |
d245e522 | 686 | if (bpc->bpc_has_vrfname) |
79b4a6fc RZ |
687 | strlcpy(bfd->key.vrfname, bpc->bpc_vrfname, |
688 | sizeof(bfd->key.vrfname)); | |
e9e2c950 | 689 | |
d245e522 RZ |
690 | /* Copy remaining data. */ |
691 | if (bpc->bpc_ipv4 == false) | |
692 | BFD_SET_FLAG(bfd->flags, BFD_SESS_FLAG_IPV6); | |
e9e2c950 | 693 | |
79b4a6fc RZ |
694 | bfd->key.family = (bpc->bpc_ipv4) ? AF_INET : AF_INET6; |
695 | switch (bfd->key.family) { | |
696 | case AF_INET: | |
697 | memcpy(&bfd->key.peer, &bpc->bpc_peer.sa_sin.sin_addr, | |
698 | sizeof(bpc->bpc_peer.sa_sin.sin_addr)); | |
699 | memcpy(&bfd->key.local, &bpc->bpc_local.sa_sin.sin_addr, | |
700 | sizeof(bpc->bpc_local.sa_sin.sin_addr)); | |
701 | break; | |
702 | ||
703 | case AF_INET6: | |
704 | memcpy(&bfd->key.peer, &bpc->bpc_peer.sa_sin6.sin6_addr, | |
705 | sizeof(bpc->bpc_peer.sa_sin6.sin6_addr)); | |
706 | memcpy(&bfd->key.local, &bpc->bpc_local.sa_sin6.sin6_addr, | |
707 | sizeof(bpc->bpc_local.sa_sin6.sin6_addr)); | |
708 | break; | |
709 | ||
710 | default: | |
711 | assert(1); | |
712 | break; | |
d245e522 | 713 | } |
e9e2c950 | 714 | |
79b4a6fc RZ |
715 | if (bpc->bpc_mhop) |
716 | BFD_SET_FLAG(bfd->flags, BFD_SESS_FLAG_MH); | |
717 | ||
718 | bfd->key.mhop = bpc->bpc_mhop; | |
719 | ||
720 | /* Registrate session into data structures. */ | |
721 | bfd_key_insert(bfd); | |
722 | bfd->discrs.my_discr = ptm_bfd_gen_ID(); | |
723 | bfd_id_insert(bfd); | |
d245e522 RZ |
724 | |
725 | /* Try to enable session and schedule for packet receive/send. */ | |
726 | if (bfd_session_enable(bfd) == -1) { | |
727 | /* Unrecoverable failure, remove the session/peer. */ | |
728 | bfd_session_free(bfd); | |
729 | return NULL; | |
e9e2c950 RZ |
730 | } |
731 | ||
261e0ba9 RZ |
732 | /* Add observer if we have moving parts. */ |
733 | if (bfd->key.ifname[0] || bfd->key.vrfname[0] || bfd->sock == -1) | |
734 | bs_observer_add(bfd); | |
735 | ||
d245e522 | 736 | /* Apply other configurations. */ |
e9e2c950 RZ |
737 | _bfd_session_update(bfd, bpc); |
738 | ||
03e7f088 | 739 | log_info("session-new: %s", bs_to_string(bfd)); |
e9e2c950 RZ |
740 | |
741 | control_notify_config(BCM_NOTIFY_CONFIG_ADD, bfd); | |
742 | ||
743 | return bfd; | |
744 | } | |
745 | ||
bc50bcc8 | 746 | int ptm_bfd_sess_del(struct bfd_peer_cfg *bpc) |
e9e2c950 RZ |
747 | { |
748 | struct bfd_session *bs; | |
749 | ||
750 | /* Find session and call free(). */ | |
751 | bs = bs_peer_find(bpc); | |
752 | if (bs == NULL) | |
753 | return -1; | |
754 | ||
755 | /* This pointer is being referenced, don't let it be deleted. */ | |
756 | if (bs->refcount > 0) { | |
03e7f088 RZ |
757 | log_error("session-delete: refcount failure: %" PRIu64 |
758 | " references", | |
759 | bs->refcount); | |
e9e2c950 RZ |
760 | return -1; |
761 | } | |
762 | ||
03e7f088 | 763 | log_info("session-delete: %s", bs_to_string(bs)); |
e9e2c950 RZ |
764 | |
765 | control_notify_config(BCM_NOTIFY_CONFIG_DELETE, bs); | |
766 | ||
767 | bfd_session_free(bs); | |
768 | ||
769 | return 0; | |
770 | } | |
771 | ||
d3f3a2c4 RZ |
772 | void bfd_set_polling(struct bfd_session *bs) |
773 | { | |
c0ef9a8a RZ |
774 | /* |
775 | * Start polling procedure: the only timers that require polling | |
776 | * to change value without losing connection are: | |
777 | * | |
778 | * - Desired minimum transmission interval; | |
779 | * - Required minimum receive interval; | |
780 | * | |
781 | * RFC 5880, Section 6.8.3. | |
782 | */ | |
d3f3a2c4 RZ |
783 | bs->polling = 1; |
784 | } | |
785 | ||
aef131af RZ |
786 | /* |
787 | * bs_<state>_handler() functions implement the BFD state machine | |
788 | * transition mechanism. `<state>` is the current session state and | |
789 | * the parameter `nstate` is the peer new state. | |
790 | */ | |
9f37770f RZ |
791 | static void bs_admin_down_handler(struct bfd_session *bs |
792 | __attribute__((__unused__)), | |
793 | int nstate __attribute__((__unused__))) | |
aef131af RZ |
794 | { |
795 | /* | |
796 | * We are administratively down, there is no state machine | |
797 | * handling. | |
798 | */ | |
799 | } | |
800 | ||
9f37770f | 801 | static void bs_down_handler(struct bfd_session *bs, int nstate) |
aef131af RZ |
802 | { |
803 | switch (nstate) { | |
804 | case PTM_BFD_ADM_DOWN: | |
805 | /* | |
806 | * Remote peer doesn't want to talk, so lets keep the | |
807 | * connection down. | |
808 | */ | |
809 | case PTM_BFD_UP: | |
810 | /* Peer can't be up yet, wait it go to 'init' or 'down'. */ | |
811 | break; | |
812 | ||
813 | case PTM_BFD_DOWN: | |
814 | /* | |
815 | * Remote peer agreed that the path is down, lets try to | |
816 | * bring it up. | |
817 | */ | |
818 | bs->ses_state = PTM_BFD_INIT; | |
819 | break; | |
820 | ||
821 | case PTM_BFD_INIT: | |
822 | /* | |
823 | * Remote peer told us his path is up, lets turn | |
824 | * activate the session. | |
825 | */ | |
bc50bcc8 | 826 | ptm_bfd_sess_up(bs); |
aef131af RZ |
827 | break; |
828 | ||
829 | default: | |
830 | log_debug("state-change: unhandled neighbor state: %d", nstate); | |
831 | break; | |
832 | } | |
833 | } | |
834 | ||
9f37770f | 835 | static void bs_init_handler(struct bfd_session *bs, int nstate) |
aef131af RZ |
836 | { |
837 | switch (nstate) { | |
838 | case PTM_BFD_ADM_DOWN: | |
839 | /* | |
840 | * Remote peer doesn't want to talk, so lets make the | |
841 | * connection down. | |
842 | */ | |
843 | bs->ses_state = PTM_BFD_DOWN; | |
844 | break; | |
845 | ||
846 | case PTM_BFD_DOWN: | |
847 | /* Remote peer hasn't moved to first stage yet. */ | |
848 | break; | |
849 | ||
850 | case PTM_BFD_INIT: | |
851 | case PTM_BFD_UP: | |
852 | /* We agreed on the settings and the path is up. */ | |
bc50bcc8 | 853 | ptm_bfd_sess_up(bs); |
aef131af RZ |
854 | break; |
855 | ||
856 | default: | |
857 | log_debug("state-change: unhandled neighbor state: %d", nstate); | |
858 | break; | |
859 | } | |
860 | } | |
861 | ||
9f37770f | 862 | static void bs_up_handler(struct bfd_session *bs, int nstate) |
aef131af RZ |
863 | { |
864 | switch (nstate) { | |
865 | case PTM_BFD_ADM_DOWN: | |
866 | case PTM_BFD_DOWN: | |
867 | /* Peer lost or asked to shutdown connection. */ | |
bc50bcc8 | 868 | ptm_bfd_sess_dn(bs, BD_NEIGHBOR_DOWN); |
aef131af RZ |
869 | break; |
870 | ||
871 | case PTM_BFD_INIT: | |
872 | case PTM_BFD_UP: | |
873 | /* Path is up and working. */ | |
874 | break; | |
875 | ||
876 | default: | |
877 | log_debug("state-change: unhandled neighbor state: %d", nstate); | |
878 | break; | |
879 | } | |
880 | } | |
881 | ||
882 | void bs_state_handler(struct bfd_session *bs, int nstate) | |
883 | { | |
884 | switch (bs->ses_state) { | |
885 | case PTM_BFD_ADM_DOWN: | |
886 | bs_admin_down_handler(bs, nstate); | |
887 | break; | |
888 | case PTM_BFD_DOWN: | |
889 | bs_down_handler(bs, nstate); | |
890 | break; | |
891 | case PTM_BFD_INIT: | |
892 | bs_init_handler(bs, nstate); | |
893 | break; | |
894 | case PTM_BFD_UP: | |
895 | bs_up_handler(bs, nstate); | |
896 | break; | |
897 | ||
898 | default: | |
899 | log_debug("state-change: [%s] is in invalid state: %d", | |
900 | bs_to_string(bs), nstate); | |
901 | break; | |
902 | } | |
903 | } | |
904 | ||
c0ef9a8a RZ |
905 | /* |
906 | * Handles echo timer manipulation after updating timer. | |
907 | */ | |
908 | void bs_echo_timer_handler(struct bfd_session *bs) | |
909 | { | |
910 | uint32_t old_timer; | |
911 | ||
912 | /* | |
913 | * Before doing any echo handling, check if it is possible to | |
914 | * use it. | |
915 | * | |
916 | * - Check for `echo-mode` configuration. | |
917 | * - Check that we are not using multi hop (RFC 5883, | |
918 | * Section 3). | |
919 | * - Check that we are already at the up state. | |
920 | */ | |
921 | if (BFD_CHECK_FLAG(bs->flags, BFD_SESS_FLAG_ECHO) == 0 | |
922 | || BFD_CHECK_FLAG(bs->flags, BFD_SESS_FLAG_MH) | |
923 | || bs->ses_state != PTM_BFD_UP) | |
924 | return; | |
925 | ||
926 | /* Remote peer asked to stop echo. */ | |
927 | if (bs->remote_timers.required_min_echo == 0) { | |
928 | if (BFD_CHECK_FLAG(bs->flags, BFD_SESS_FLAG_ECHO_ACTIVE)) | |
8bd859f6 | 929 | ptm_bfd_echo_stop(bs); |
c0ef9a8a RZ |
930 | |
931 | return; | |
932 | } | |
933 | ||
934 | /* | |
935 | * Calculate the echo transmission timer: we must not send | |
936 | * echo packets faster than the minimum required time | |
937 | * announced by the remote system. | |
938 | * | |
939 | * RFC 5880, Section 6.8.9. | |
940 | */ | |
941 | old_timer = bs->echo_xmt_TO; | |
942 | if (bs->remote_timers.required_min_echo > bs->timers.required_min_echo) | |
943 | bs->echo_xmt_TO = bs->remote_timers.required_min_echo; | |
944 | else | |
945 | bs->echo_xmt_TO = bs->timers.required_min_echo; | |
946 | ||
947 | if (BFD_CHECK_FLAG(bs->flags, BFD_SESS_FLAG_ECHO_ACTIVE) == 0 | |
948 | || old_timer != bs->echo_xmt_TO) | |
949 | ptm_bfd_echo_start(bs); | |
950 | } | |
951 | ||
952 | /* | |
953 | * RFC 5880 Section 6.5. | |
954 | * | |
955 | * When a BFD control packet with the final bit is received, we must | |
956 | * update the session parameters. | |
957 | */ | |
958 | void bs_final_handler(struct bfd_session *bs) | |
959 | { | |
960 | /* Start using our new timers. */ | |
f43b9368 RZ |
961 | bs->cur_timers.desired_min_tx = bs->timers.desired_min_tx; |
962 | bs->cur_timers.required_min_rx = bs->timers.required_min_rx; | |
c0ef9a8a RZ |
963 | |
964 | /* | |
965 | * TODO: demand mode. See RFC 5880 Section 6.1. | |
966 | * | |
967 | * When using demand mode we must disable the detection timer | |
968 | * for lost control packets. | |
969 | */ | |
970 | if (bs->demand_mode) { | |
971 | /* Notify watchers about changed timers. */ | |
972 | control_notify_config(BCM_NOTIFY_CONFIG_UPDATE, bs); | |
973 | return; | |
974 | } | |
975 | ||
976 | /* | |
977 | * Calculate detection time based on new timers. | |
978 | * | |
979 | * Transmission calculation: | |
980 | * We must respect the RequiredMinRxInterval from the remote | |
981 | * system: if our desired transmission timer is more than the | |
982 | * minimum receive rate, then we must lower it to at least the | |
983 | * minimum receive interval. | |
984 | * | |
985 | * RFC 5880, Section 6.8.3. | |
986 | */ | |
987 | if (bs->timers.desired_min_tx > bs->remote_timers.required_min_rx) | |
988 | bs->xmt_TO = bs->remote_timers.required_min_rx; | |
989 | else | |
990 | bs->xmt_TO = bs->timers.desired_min_tx; | |
991 | ||
992 | /* Apply new transmission timer immediately. */ | |
993 | ptm_bfd_start_xmt_timer(bs, false); | |
994 | ||
995 | /* | |
996 | * Detection timeout calculation: | |
997 | * The minimum detection timeout is the remote detection | |
998 | * multipler (number of packets to be missed) times the agreed | |
999 | * transmission interval. | |
1000 | * | |
1001 | * RFC 5880, Section 6.8.4. | |
1002 | * | |
1003 | * TODO: support sending/counting more packets inside detection | |
1004 | * timeout. | |
1005 | */ | |
1006 | if (bs->remote_timers.required_min_rx > bs->timers.desired_min_tx) | |
1007 | bs->detect_TO = bs->remote_detect_mult | |
1008 | * bs->remote_timers.required_min_rx; | |
1009 | else | |
1010 | bs->detect_TO = bs->remote_detect_mult | |
1011 | * bs->timers.desired_min_tx; | |
1012 | ||
1013 | /* Apply new receive timer immediately. */ | |
1014 | bfd_recvtimer_update(bs); | |
1015 | ||
1016 | /* Notify watchers about changed timers. */ | |
1017 | control_notify_config(BCM_NOTIFY_CONFIG_UPDATE, bs); | |
1018 | } | |
1019 | ||
b912b189 RZ |
1020 | void bs_set_slow_timers(struct bfd_session *bs) |
1021 | { | |
1022 | /* | |
1023 | * BFD connection must use slow timers before going up or after | |
1024 | * losing connectivity to avoid wasting bandwidth. | |
1025 | * | |
1026 | * RFC 5880, Section 6.8.3. | |
1027 | */ | |
1028 | bs->cur_timers.desired_min_tx = BFD_DEF_SLOWTX; | |
1029 | bs->cur_timers.required_min_rx = BFD_DEF_SLOWTX; | |
1030 | bs->cur_timers.required_min_echo = 0; | |
1031 | ||
1032 | /* Set the appropriated timeouts for slow connection. */ | |
1033 | bs->detect_TO = (BFD_DEFDETECTMULT * BFD_DEF_SLOWTX); | |
1034 | bs->xmt_TO = BFD_DEF_SLOWTX; | |
1035 | } | |
e9e2c950 RZ |
1036 | |
1037 | /* | |
1038 | * Helper functions. | |
1039 | */ | |
1040 | static const char *get_diag_str(int diag) | |
1041 | { | |
1042 | for (int i = 0; diag_list[i].str; i++) { | |
1043 | if (diag_list[i].type == diag) | |
1044 | return diag_list[i].str; | |
1045 | } | |
1046 | return "N/A"; | |
1047 | } | |
1048 | ||
1049 | const char *satostr(struct sockaddr_any *sa) | |
1050 | { | |
1051 | #define INETSTR_BUFCOUNT 8 | |
1052 | static char buf[INETSTR_BUFCOUNT][INET6_ADDRSTRLEN]; | |
1053 | static int bufidx; | |
1054 | struct sockaddr_in *sin = &sa->sa_sin; | |
1055 | struct sockaddr_in6 *sin6 = &sa->sa_sin6; | |
1056 | ||
1057 | bufidx += (bufidx + 1) % INETSTR_BUFCOUNT; | |
1058 | buf[bufidx][0] = 0; | |
1059 | ||
1060 | switch (sin->sin_family) { | |
1061 | case AF_INET: | |
1062 | inet_ntop(AF_INET, &sin->sin_addr, buf[bufidx], | |
1063 | sizeof(buf[bufidx])); | |
1064 | break; | |
1065 | case AF_INET6: | |
1066 | inet_ntop(AF_INET6, &sin6->sin6_addr, buf[bufidx], | |
1067 | sizeof(buf[bufidx])); | |
1068 | break; | |
1069 | ||
1070 | default: | |
1071 | strlcpy(buf[bufidx], "unknown", sizeof(buf[bufidx])); | |
1072 | break; | |
1073 | } | |
1074 | ||
1075 | return buf[bufidx]; | |
1076 | } | |
1077 | ||
1078 | const char *diag2str(uint8_t diag) | |
1079 | { | |
1080 | switch (diag) { | |
1081 | case 0: | |
1082 | return "ok"; | |
1083 | case 1: | |
1084 | return "control detection time expired"; | |
1085 | case 2: | |
1086 | return "echo function failed"; | |
1087 | case 3: | |
1088 | return "neighbor signaled session down"; | |
1089 | case 4: | |
1090 | return "forwarding plane reset"; | |
1091 | case 5: | |
1092 | return "path down"; | |
1093 | case 6: | |
1094 | return "concatenated path down"; | |
1095 | case 7: | |
1096 | return "administratively down"; | |
1097 | case 8: | |
1098 | return "reverse concatenated path down"; | |
1099 | default: | |
1100 | return "unknown"; | |
1101 | } | |
1102 | } | |
1103 | ||
1104 | int strtosa(const char *addr, struct sockaddr_any *sa) | |
1105 | { | |
1106 | memset(sa, 0, sizeof(*sa)); | |
1107 | ||
1108 | if (inet_pton(AF_INET, addr, &sa->sa_sin.sin_addr) == 1) { | |
1109 | sa->sa_sin.sin_family = AF_INET; | |
1110 | #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN | |
1111 | sa->sa_sin.sin_len = sizeof(sa->sa_sin); | |
1112 | #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */ | |
1113 | return 0; | |
1114 | } | |
1115 | ||
1116 | if (inet_pton(AF_INET6, addr, &sa->sa_sin6.sin6_addr) == 1) { | |
1117 | sa->sa_sin6.sin6_family = AF_INET6; | |
1118 | #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN | |
1119 | sa->sa_sin6.sin6_len = sizeof(sa->sa_sin6); | |
1120 | #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */ | |
1121 | return 0; | |
1122 | } | |
1123 | ||
1124 | return -1; | |
1125 | } | |
1126 | ||
1127 | void integer2timestr(uint64_t time, char *buf, size_t buflen) | |
1128 | { | |
1129 | unsigned int year, month, day, hour, minute, second; | |
1130 | int rv; | |
1131 | ||
1132 | #define MINUTES (60) | |
23586b05 DS |
1133 | #define HOURS (60 * MINUTES) |
1134 | #define DAYS (24 * HOURS) | |
1135 | #define MONTHS (30 * DAYS) | |
1136 | #define YEARS (12 * MONTHS) | |
e9e2c950 RZ |
1137 | if (time >= YEARS) { |
1138 | year = time / YEARS; | |
1139 | time -= year * YEARS; | |
1140 | ||
1141 | rv = snprintf(buf, buflen, "%u year(s), ", year); | |
1142 | buf += rv; | |
1143 | buflen -= rv; | |
1144 | } | |
1145 | if (time >= MONTHS) { | |
1146 | month = time / MONTHS; | |
1147 | time -= month * MONTHS; | |
1148 | ||
1149 | rv = snprintf(buf, buflen, "%u month(s), ", month); | |
1150 | buf += rv; | |
1151 | buflen -= rv; | |
1152 | } | |
1153 | if (time >= DAYS) { | |
1154 | day = time / DAYS; | |
1155 | time -= day * DAYS; | |
1156 | ||
1157 | rv = snprintf(buf, buflen, "%u day(s), ", day); | |
1158 | buf += rv; | |
1159 | buflen -= rv; | |
1160 | } | |
1161 | if (time >= HOURS) { | |
1162 | hour = time / HOURS; | |
1163 | time -= hour * HOURS; | |
1164 | ||
1165 | rv = snprintf(buf, buflen, "%u hour(s), ", hour); | |
1166 | buf += rv; | |
1167 | buflen -= rv; | |
1168 | } | |
1169 | if (time >= MINUTES) { | |
1170 | minute = time / MINUTES; | |
1171 | time -= minute * MINUTES; | |
1172 | ||
1173 | rv = snprintf(buf, buflen, "%u minute(s), ", minute); | |
1174 | buf += rv; | |
1175 | buflen -= rv; | |
1176 | } | |
1177 | second = time % MINUTES; | |
1178 | snprintf(buf, buflen, "%u second(s)", second); | |
1179 | } | |
1180 | ||
79b4a6fc | 1181 | const char *bs_to_string(const struct bfd_session *bs) |
03e7f088 RZ |
1182 | { |
1183 | static char buf[256]; | |
79b4a6fc | 1184 | char addr_buf[INET6_ADDRSTRLEN]; |
03e7f088 RZ |
1185 | int pos; |
1186 | bool is_mhop = BFD_CHECK_FLAG(bs->flags, BFD_SESS_FLAG_MH); | |
1187 | ||
1188 | pos = snprintf(buf, sizeof(buf), "mhop:%s", is_mhop ? "yes" : "no"); | |
79b4a6fc RZ |
1189 | pos += snprintf(buf + pos, sizeof(buf) - pos, " peer:%s", |
1190 | inet_ntop(bs->key.family, &bs->key.peer, addr_buf, | |
1191 | sizeof(addr_buf))); | |
1192 | pos += snprintf(buf + pos, sizeof(buf) - pos, " local:%s", | |
1193 | inet_ntop(bs->key.family, &bs->key.local, addr_buf, | |
1194 | sizeof(addr_buf))); | |
1195 | if (bs->key.vrfname[0]) | |
1196 | pos += snprintf(buf + pos, sizeof(buf) - pos, " vrf:%s", | |
1197 | bs->key.vrfname); | |
1198 | if (bs->key.ifname[0]) | |
1199 | pos += snprintf(buf + pos, sizeof(buf) - pos, " ifname:%s", | |
1200 | bs->key.ifname); | |
3cef9b7f DS |
1201 | |
1202 | (void)pos; | |
1203 | ||
03e7f088 RZ |
1204 | return buf; |
1205 | } | |
1206 | ||
d245e522 RZ |
1207 | int bs_observer_add(struct bfd_session *bs) |
1208 | { | |
1209 | struct bfd_session_observer *bso; | |
1210 | ||
ed74032b DS |
1211 | bso = XCALLOC(MTYPE_BFDD_SESSION_OBSERVER, sizeof(*bso)); |
1212 | bso->bso_isaddress = false; | |
d245e522 RZ |
1213 | bso->bso_bs = bs; |
1214 | bso->bso_isinterface = !BFD_CHECK_FLAG(bs->flags, BFD_SESS_FLAG_MH); | |
1215 | if (bso->bso_isinterface) | |
79b4a6fc | 1216 | strlcpy(bso->bso_entryname, bs->key.ifname, |
d245e522 | 1217 | sizeof(bso->bso_entryname)); |
261e0ba9 RZ |
1218 | /* Handle socket binding failures caused by missing local addresses. */ |
1219 | if (bs->sock == -1) { | |
1220 | bso->bso_isaddress = true; | |
1221 | bso->bso_addr.family = bs->key.family; | |
1222 | memcpy(&bso->bso_addr.u.prefix, &bs->key.local, | |
1223 | sizeof(bs->key.local)); | |
1224 | } | |
1225 | ||
d245e522 RZ |
1226 | TAILQ_INSERT_TAIL(&bglobal.bg_obslist, bso, bso_entry); |
1227 | ||
1228 | return 0; | |
1229 | } | |
1230 | ||
1231 | void bs_observer_del(struct bfd_session_observer *bso) | |
1232 | { | |
1233 | TAILQ_REMOVE(&bglobal.bg_obslist, bso, bso_entry); | |
1234 | XFREE(MTYPE_BFDD_SESSION_OBSERVER, bso); | |
1235 | } | |
1236 | ||
79b4a6fc RZ |
1237 | void bs_to_bpc(struct bfd_session *bs, struct bfd_peer_cfg *bpc) |
1238 | { | |
1239 | memset(bpc, 0, sizeof(*bpc)); | |
1240 | ||
1241 | bpc->bpc_ipv4 = (bs->key.family == AF_INET); | |
1242 | bpc->bpc_mhop = bs->key.mhop; | |
1243 | ||
1244 | switch (bs->key.family) { | |
1245 | case AF_INET: | |
1246 | bpc->bpc_peer.sa_sin.sin_family = AF_INET; | |
1247 | memcpy(&bpc->bpc_peer.sa_sin.sin_addr, &bs->key.peer, | |
1248 | sizeof(bpc->bpc_peer.sa_sin.sin_addr)); | |
1249 | ||
1250 | if (memcmp(&bs->key.local, &zero_addr, sizeof(bs->key.local))) { | |
1251 | bpc->bpc_local.sa_sin.sin_family = AF_INET6; | |
5ff7d1be | 1252 | memcpy(&bpc->bpc_local.sa_sin.sin_addr, &bs->key.local, |
79b4a6fc RZ |
1253 | sizeof(bpc->bpc_local.sa_sin.sin_addr)); |
1254 | } | |
1255 | break; | |
1256 | ||
1257 | case AF_INET6: | |
1258 | bpc->bpc_peer.sa_sin.sin_family = AF_INET6; | |
1259 | memcpy(&bpc->bpc_peer.sa_sin6.sin6_addr, &bs->key.peer, | |
1260 | sizeof(bpc->bpc_peer.sa_sin6.sin6_addr)); | |
1261 | ||
1262 | bpc->bpc_local.sa_sin6.sin6_family = AF_INET6; | |
5ff7d1be | 1263 | memcpy(&bpc->bpc_local.sa_sin6.sin6_addr, &bs->key.local, |
79b4a6fc RZ |
1264 | sizeof(bpc->bpc_local.sa_sin6.sin6_addr)); |
1265 | break; | |
1266 | } | |
1267 | ||
1268 | if (bs->key.ifname[0]) { | |
1269 | bpc->bpc_has_localif = true; | |
1270 | strlcpy(bpc->bpc_localif, bs->key.ifname, | |
1271 | sizeof(bpc->bpc_localif)); | |
1272 | } | |
1273 | ||
1274 | if (bs->key.vrfname[0]) { | |
1275 | bpc->bpc_has_vrfname = true; | |
1276 | strlcpy(bpc->bpc_vrfname, bs->key.vrfname, | |
1277 | sizeof(bpc->bpc_vrfname)); | |
1278 | } | |
1279 | } | |
1280 | ||
e9e2c950 RZ |
1281 | |
1282 | /* | |
1283 | * BFD hash data structures to find sessions. | |
1284 | */ | |
1285 | static struct hash *bfd_id_hash; | |
79b4a6fc | 1286 | static struct hash *bfd_key_hash; |
e9e2c950 | 1287 | |
d8b87afe QY |
1288 | static unsigned int bfd_id_hash_do(const void *p); |
1289 | static unsigned int bfd_key_hash_do(const void *p); | |
e9e2c950 | 1290 | |
e3b78da8 | 1291 | static void _bfd_free(struct hash_bucket *hb, |
e9e2c950 | 1292 | void *arg __attribute__((__unused__))); |
e9e2c950 RZ |
1293 | |
1294 | /* BFD hash for our discriminator. */ | |
d8b87afe | 1295 | static unsigned int bfd_id_hash_do(const void *p) |
e9e2c950 | 1296 | { |
d8b87afe | 1297 | const struct bfd_session *bs = p; |
e9e2c950 RZ |
1298 | |
1299 | return jhash_1word(bs->discrs.my_discr, 0); | |
1300 | } | |
1301 | ||
74df8d6d | 1302 | static bool bfd_id_hash_cmp(const void *n1, const void *n2) |
e9e2c950 RZ |
1303 | { |
1304 | const struct bfd_session *bs1 = n1, *bs2 = n2; | |
1305 | ||
1306 | return bs1->discrs.my_discr == bs2->discrs.my_discr; | |
1307 | } | |
1308 | ||
1309 | /* BFD hash for single hop. */ | |
d8b87afe | 1310 | static unsigned int bfd_key_hash_do(const void *p) |
e9e2c950 | 1311 | { |
d8b87afe | 1312 | const struct bfd_session *bs = p; |
e9e2c950 | 1313 | |
79b4a6fc | 1314 | return jhash(&bs->key, sizeof(bs->key), 0); |
e9e2c950 RZ |
1315 | } |
1316 | ||
79b4a6fc | 1317 | static bool bfd_key_hash_cmp(const void *n1, const void *n2) |
e9e2c950 RZ |
1318 | { |
1319 | const struct bfd_session *bs1 = n1, *bs2 = n2; | |
1320 | ||
79b4a6fc | 1321 | return memcmp(&bs1->key, &bs2->key, sizeof(bs1->key)) == 0; |
e9e2c950 RZ |
1322 | } |
1323 | ||
e9e2c950 | 1324 | |
e9e2c950 RZ |
1325 | /* |
1326 | * Hash public interface / exported functions. | |
1327 | */ | |
1328 | ||
1329 | /* Lookup functions. */ | |
1330 | struct bfd_session *bfd_id_lookup(uint32_t id) | |
1331 | { | |
1332 | struct bfd_session bs; | |
1333 | ||
1334 | bs.discrs.my_discr = id; | |
1335 | ||
1336 | return hash_lookup(bfd_id_hash, &bs); | |
1337 | } | |
1338 | ||
5ef92a2b PG |
1339 | struct bfd_key_walk_partial_lookup { |
1340 | struct bfd_session *given; | |
1341 | struct bfd_session *result; | |
1342 | }; | |
1343 | ||
1344 | /* ignore some parameters */ | |
1345 | static int bfd_key_lookup_ignore_partial_walker(struct hash_bucket *b, void *data) | |
1346 | { | |
1347 | struct bfd_key_walk_partial_lookup *ctx = | |
1348 | (struct bfd_key_walk_partial_lookup *)data; | |
1349 | struct bfd_session *given = ctx->given; | |
1350 | struct bfd_session *parsed = b->data; | |
1351 | ||
1352 | if (given->key.family != parsed->key.family) | |
1353 | return HASHWALK_CONTINUE; | |
1354 | if (given->key.mhop != parsed->key.mhop) | |
1355 | return HASHWALK_CONTINUE; | |
1356 | if (memcmp(&given->key.peer, &parsed->key.peer, sizeof(struct in6_addr))) | |
1357 | return HASHWALK_CONTINUE; | |
1358 | if (memcmp(given->key.vrfname, parsed->key.vrfname, MAXNAMELEN)) | |
1359 | return HASHWALK_CONTINUE; | |
1360 | ctx->result = parsed; | |
1361 | /* ignore localaddr or interface */ | |
1362 | return HASHWALK_ABORT; | |
1363 | } | |
1364 | ||
79b4a6fc | 1365 | struct bfd_session *bfd_key_lookup(struct bfd_key key) |
e9e2c950 RZ |
1366 | { |
1367 | struct bfd_session bs, *bsp; | |
5ef92a2b PG |
1368 | struct bfd_key_walk_partial_lookup ctx; |
1369 | char peer_buf[INET6_ADDRSTRLEN]; | |
e9e2c950 | 1370 | |
79b4a6fc RZ |
1371 | bs.key = key; |
1372 | bsp = hash_lookup(bfd_key_hash, &bs); | |
5ef92a2b PG |
1373 | if (bsp) |
1374 | return bsp; | |
e9e2c950 | 1375 | |
5ef92a2b PG |
1376 | inet_ntop(bs.key.family, &bs.key.peer, peer_buf, |
1377 | sizeof(peer_buf)); | |
79b4a6fc | 1378 | /* Handle cases where local-address is optional. */ |
5ef92a2b | 1379 | if (bs.key.family == AF_INET) { |
79b4a6fc RZ |
1380 | memset(&bs.key.local, 0, sizeof(bs.key.local)); |
1381 | bsp = hash_lookup(bfd_key_hash, &bs); | |
5ef92a2b PG |
1382 | if (bsp) { |
1383 | char addr_buf[INET6_ADDRSTRLEN]; | |
1384 | ||
1385 | inet_ntop(bs.key.family, &key.local, addr_buf, | |
1386 | sizeof(addr_buf)); | |
1387 | log_debug(" peer %s found, but loc-addr %s ignored", | |
1388 | peer_buf, addr_buf); | |
1389 | return bsp; | |
1390 | } | |
e9e2c950 RZ |
1391 | } |
1392 | ||
79b4a6fc | 1393 | bs.key = key; |
5ef92a2b PG |
1394 | /* Handle cases where ifname is optional. */ |
1395 | if (bs.key.ifname[0]) { | |
79b4a6fc RZ |
1396 | memset(bs.key.ifname, 0, sizeof(bs.key.ifname)); |
1397 | bsp = hash_lookup(bfd_key_hash, &bs); | |
5ef92a2b PG |
1398 | if (bsp) { |
1399 | log_debug(" peer %s found, but ifp %s ignored", | |
1400 | peer_buf, key.ifname); | |
1401 | return bsp; | |
1402 | } | |
1403 | } | |
e9e2c950 | 1404 | |
5ef92a2b PG |
1405 | /* Handle cases where local-address and ifname are optional. */ |
1406 | if (bs.key.family == AF_INET) { | |
1407 | memset(&bs.key.local, 0, sizeof(bs.key.local)); | |
1408 | bsp = hash_lookup(bfd_key_hash, &bs); | |
1409 | if (bsp) { | |
1410 | char addr_buf[INET6_ADDRSTRLEN]; | |
1411 | ||
1412 | inet_ntop(bs.key.family, &bs.key.local, addr_buf, | |
1413 | sizeof(addr_buf)); | |
1414 | log_debug(" peer %s found, but ifp %s" | |
1415 | " and loc-addr %s ignored", | |
1416 | peer_buf, key.ifname, | |
1417 | addr_buf); | |
1418 | return bsp; | |
79b4a6fc RZ |
1419 | } |
1420 | } | |
5ef92a2b | 1421 | bs.key = key; |
e9e2c950 | 1422 | |
5ef92a2b PG |
1423 | /* Handle case where a context more complex ctx is present. |
1424 | * input has no iface nor local-address, but a context may | |
1425 | * exist | |
1426 | */ | |
1427 | ctx.result = NULL; | |
1428 | ctx.given = &bs; | |
1429 | hash_walk(bfd_key_hash, | |
1430 | &bfd_key_lookup_ignore_partial_walker, | |
1431 | &ctx); | |
1432 | /* change key */ | |
1433 | if (ctx.result) { | |
1434 | bsp = ctx.result; | |
1435 | log_debug(" peer %s found, but ifp" | |
1436 | " and/or loc-addr params ignored"); | |
1437 | } | |
79b4a6fc | 1438 | return bsp; |
e9e2c950 RZ |
1439 | } |
1440 | ||
e9e2c950 RZ |
1441 | /* |
1442 | * Delete functions. | |
1443 | * | |
1444 | * Delete functions searches and remove the item from the hash and | |
1445 | * returns a pointer to the removed item data. If the item was not found | |
1446 | * then it returns NULL. | |
1447 | * | |
1448 | * The data stored inside the hash is not free()ed, so you must do it | |
1449 | * manually after getting the pointer back. | |
1450 | */ | |
1451 | struct bfd_session *bfd_id_delete(uint32_t id) | |
1452 | { | |
1453 | struct bfd_session bs; | |
1454 | ||
1455 | bs.discrs.my_discr = id; | |
1456 | ||
1457 | return hash_release(bfd_id_hash, &bs); | |
1458 | } | |
1459 | ||
79b4a6fc | 1460 | struct bfd_session *bfd_key_delete(struct bfd_key key) |
e9e2c950 RZ |
1461 | { |
1462 | struct bfd_session bs, *bsp; | |
1463 | ||
79b4a6fc RZ |
1464 | bs.key = key; |
1465 | bsp = hash_lookup(bfd_key_hash, &bs); | |
1466 | if (bsp == NULL && key.ifname[0]) { | |
1467 | memset(bs.key.ifname, 0, sizeof(bs.key.ifname)); | |
1468 | bsp = hash_lookup(bfd_key_hash, &bs); | |
e9e2c950 RZ |
1469 | } |
1470 | ||
79b4a6fc | 1471 | return hash_release(bfd_key_hash, bsp); |
e9e2c950 RZ |
1472 | } |
1473 | ||
e9e2c950 RZ |
1474 | /* Iteration functions. */ |
1475 | void bfd_id_iterate(hash_iter_func hif, void *arg) | |
1476 | { | |
1477 | hash_iterate(bfd_id_hash, hif, arg); | |
1478 | } | |
1479 | ||
79b4a6fc | 1480 | void bfd_key_iterate(hash_iter_func hif, void *arg) |
e9e2c950 | 1481 | { |
79b4a6fc | 1482 | hash_iterate(bfd_key_hash, hif, arg); |
e9e2c950 RZ |
1483 | } |
1484 | ||
e9e2c950 RZ |
1485 | /* |
1486 | * Insert functions. | |
1487 | * | |
1488 | * Inserts session into hash and returns `true` on success, otherwise | |
1489 | * `false`. | |
1490 | */ | |
1491 | bool bfd_id_insert(struct bfd_session *bs) | |
1492 | { | |
1493 | return (hash_get(bfd_id_hash, bs, hash_alloc_intern) == bs); | |
1494 | } | |
1495 | ||
79b4a6fc | 1496 | bool bfd_key_insert(struct bfd_session *bs) |
e9e2c950 | 1497 | { |
79b4a6fc | 1498 | return (hash_get(bfd_key_hash, bs, hash_alloc_intern) == bs); |
e9e2c950 RZ |
1499 | } |
1500 | ||
e9e2c950 RZ |
1501 | void bfd_initialize(void) |
1502 | { | |
1503 | bfd_id_hash = hash_create(bfd_id_hash_do, bfd_id_hash_cmp, | |
79b4a6fc RZ |
1504 | "BFD session discriminator hash"); |
1505 | bfd_key_hash = hash_create(bfd_key_hash_do, bfd_key_hash_cmp, | |
1506 | "BFD session hash"); | |
e9e2c950 RZ |
1507 | } |
1508 | ||
e3b78da8 | 1509 | static void _bfd_free(struct hash_bucket *hb, |
e9e2c950 RZ |
1510 | void *arg __attribute__((__unused__))) |
1511 | { | |
1512 | struct bfd_session *bs = hb->data; | |
1513 | ||
1514 | bfd_session_free(bs); | |
1515 | } | |
1516 | ||
e9e2c950 RZ |
1517 | void bfd_shutdown(void) |
1518 | { | |
1519 | /* | |
1520 | * Close and free all BFD sessions. | |
1521 | * | |
1522 | * _bfd_free() will call bfd_session_free() which will take care | |
1523 | * of removing the session from all hashes, so we just run an | |
1524 | * assert() here to make sure it really happened. | |
1525 | */ | |
1526 | bfd_id_iterate(_bfd_free, NULL); | |
79b4a6fc | 1527 | assert(bfd_key_hash->count == 0); |
e9e2c950 | 1528 | |
e9e2c950 RZ |
1529 | /* Now free the hashes themselves. */ |
1530 | hash_free(bfd_id_hash); | |
79b4a6fc | 1531 | hash_free(bfd_key_hash); |
e9e2c950 | 1532 | } |
9fc0bc5c PG |
1533 | |
1534 | static int bfd_vrf_new(struct vrf *vrf) | |
1535 | { | |
1536 | log_debug("VRF Created: %s(%u)", vrf->name, vrf->vrf_id); | |
1537 | return 0; | |
1538 | } | |
1539 | ||
1540 | static int bfd_vrf_delete(struct vrf *vrf) | |
1541 | { | |
1542 | log_debug("VRF Deletion: %s(%u)", vrf->name, vrf->vrf_id); | |
1543 | return 0; | |
1544 | } | |
1545 | ||
1546 | static int bfd_vrf_enable(struct vrf *vrf) | |
1547 | { | |
7bcadbae PG |
1548 | struct bfd_vrf_global *bvrf; |
1549 | ||
1550 | /* a different name */ | |
1551 | if (!vrf->info) { | |
1552 | bvrf = XCALLOC(MTYPE_BFDD_VRF, sizeof(struct bfd_vrf_global)); | |
1553 | bvrf->vrf = vrf; | |
1554 | vrf->info = (void *)bvrf; | |
1555 | } else | |
1556 | bvrf = vrf->info; | |
9fc0bc5c | 1557 | log_debug("VRF enable add %s id %u", vrf->name, vrf->vrf_id); |
30c5d21e PG |
1558 | if (vrf->vrf_id == VRF_DEFAULT || |
1559 | vrf_get_backend() == VRF_BACKEND_NETNS) { | |
1560 | if (!bvrf->bg_shop) | |
1561 | bvrf->bg_shop = bp_udp_shop(vrf->vrf_id); | |
1562 | if (!bvrf->bg_mhop) | |
1563 | bvrf->bg_mhop = bp_udp_mhop(vrf->vrf_id); | |
1564 | if (!bvrf->bg_shop6) | |
1565 | bvrf->bg_shop6 = bp_udp6_shop(vrf->vrf_id); | |
1566 | if (!bvrf->bg_mhop6) | |
1567 | bvrf->bg_mhop6 = bp_udp6_mhop(vrf->vrf_id); | |
1568 | if (!bvrf->bg_echo) | |
1569 | bvrf->bg_echo = bp_echo_socket(vrf->vrf_id); | |
1570 | if (!bvrf->bg_echov6) | |
1571 | bvrf->bg_echov6 = bp_echov6_socket(vrf->vrf_id); | |
1572 | ||
1573 | /* Add descriptors to the event loop. */ | |
1574 | if (!bvrf->bg_ev[0]) | |
1575 | thread_add_read(master, bfd_recv_cb, bvrf, bvrf->bg_shop, | |
1576 | &bvrf->bg_ev[0]); | |
1577 | if (!bvrf->bg_ev[1]) | |
1578 | thread_add_read(master, bfd_recv_cb, bvrf, bvrf->bg_mhop, | |
1579 | &bvrf->bg_ev[1]); | |
1580 | if (!bvrf->bg_ev[2]) | |
1581 | thread_add_read(master, bfd_recv_cb, bvrf, bvrf->bg_shop6, | |
1582 | &bvrf->bg_ev[2]); | |
1583 | if (!bvrf->bg_ev[3]) | |
1584 | thread_add_read(master, bfd_recv_cb, bvrf, bvrf->bg_mhop6, | |
1585 | &bvrf->bg_ev[3]); | |
1586 | if (!bvrf->bg_ev[4]) | |
1587 | thread_add_read(master, bfd_recv_cb, bvrf, bvrf->bg_echo, | |
1588 | &bvrf->bg_ev[4]); | |
1589 | if (!bvrf->bg_ev[5]) | |
1590 | thread_add_read(master, bfd_recv_cb, bvrf, bvrf->bg_echov6, | |
1591 | &bvrf->bg_ev[5]); | |
1592 | } | |
d24af713 | 1593 | if (vrf->vrf_id != VRF_DEFAULT) { |
54aadda1 | 1594 | bfdd_zclient_register(vrf->vrf_id); |
d24af713 PG |
1595 | bfdd_sessions_enable_vrf(vrf); |
1596 | } | |
9fc0bc5c PG |
1597 | return 0; |
1598 | } | |
1599 | ||
1600 | static int bfd_vrf_disable(struct vrf *vrf) | |
1601 | { | |
7bcadbae PG |
1602 | struct bfd_vrf_global *bvrf; |
1603 | ||
1604 | if (!vrf->info) | |
9fc0bc5c | 1605 | return 0; |
7bcadbae | 1606 | bvrf = vrf->info; |
54aadda1 | 1607 | |
d24af713 PG |
1608 | if (vrf->vrf_id != VRF_DEFAULT) { |
1609 | bfdd_sessions_disable_vrf(vrf); | |
54aadda1 | 1610 | bfdd_zclient_unregister(vrf->vrf_id); |
d24af713 | 1611 | } |
54aadda1 | 1612 | |
9fc0bc5c | 1613 | log_debug("VRF disable %s id %d", vrf->name, vrf->vrf_id); |
7bcadbae PG |
1614 | /* Close all descriptors. */ |
1615 | socket_close(&bvrf->bg_echo); | |
1616 | socket_close(&bvrf->bg_shop); | |
1617 | socket_close(&bvrf->bg_mhop); | |
1618 | socket_close(&bvrf->bg_shop6); | |
1619 | socket_close(&bvrf->bg_mhop6); | |
1620 | ||
1621 | /* free context */ | |
1622 | XFREE(MTYPE_BFDD_VRF, bvrf); | |
1623 | vrf->info = NULL; | |
1624 | ||
9fc0bc5c PG |
1625 | return 0; |
1626 | } | |
1627 | ||
1628 | void bfd_vrf_init(void) | |
1629 | { | |
1630 | vrf_init(bfd_vrf_new, bfd_vrf_enable, bfd_vrf_disable, | |
1631 | bfd_vrf_delete, NULL); | |
1632 | } | |
1633 | ||
7bcadbae PG |
1634 | void bfd_vrf_terminate(void) |
1635 | { | |
1636 | vrf_terminate(); | |
1637 | } | |
1638 | ||
1639 | struct bfd_vrf_global *bfd_vrf_look_by_session(struct bfd_session *bfd) | |
1640 | { | |
1641 | struct vrf *vrf; | |
1642 | ||
1643 | if (!vrf_is_backend_netns()) { | |
1644 | vrf = vrf_lookup_by_id(VRF_DEFAULT); | |
1645 | if (vrf) | |
1646 | return (struct bfd_vrf_global *)vrf->info; | |
1647 | return NULL; | |
1648 | } | |
1649 | if (!bfd) | |
1650 | return NULL; | |
1651 | if (!bfd->vrf) | |
1652 | return NULL; | |
1653 | return bfd->vrf->info; | |
1654 | } |