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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 RZ |
30 | #include "lib/jhash.h" |
31 | ||
32 | #include "bfd.h" | |
33 | ||
34 | DEFINE_QOBJ_TYPE(bfd_session); | |
35 | ||
36 | /* | |
37 | * Prototypes | |
38 | */ | |
39 | static uint32_t ptm_bfd_gen_ID(void); | |
40 | static void ptm_bfd_echo_xmt_TO(struct bfd_session *bfd); | |
41 | static void bfd_session_free(struct bfd_session *bs); | |
42 | static struct bfd_session *bfd_session_new(int sd); | |
43 | static struct bfd_session *bfd_find_disc(struct sockaddr_any *sa, | |
44 | uint32_t ldisc); | |
45 | static int bfd_session_update(struct bfd_session *bs, struct bfd_peer_cfg *bpc); | |
46 | static const char *get_diag_str(int diag); | |
47 | ||
48 | ||
49 | /* | |
50 | * Functions | |
51 | */ | |
52 | struct bfd_session *bs_peer_find(struct bfd_peer_cfg *bpc) | |
53 | { | |
54 | struct bfd_session *bs; | |
55 | struct peer_label *pl; | |
56 | struct bfd_mhop_key mhop; | |
57 | struct bfd_shop_key shop; | |
58 | ||
59 | /* Try to find label first. */ | |
60 | if (bpc->bpc_has_label) { | |
61 | pl = pl_find(bpc->bpc_label); | |
62 | if (pl != NULL) { | |
63 | bs = pl->pl_bs; | |
64 | return bs; | |
65 | } | |
66 | } | |
67 | ||
68 | /* Otherwise fallback to peer/local hash lookup. */ | |
69 | if (bpc->bpc_mhop) { | |
70 | memset(&mhop, 0, sizeof(mhop)); | |
71 | mhop.peer = bpc->bpc_peer; | |
72 | mhop.local = bpc->bpc_local; | |
73 | if (bpc->bpc_has_vrfname) | |
74 | strlcpy(mhop.vrf_name, bpc->bpc_vrfname, | |
75 | sizeof(mhop.vrf_name)); | |
76 | ||
77 | bs = bfd_mhop_lookup(mhop); | |
78 | } else { | |
79 | memset(&shop, 0, sizeof(shop)); | |
80 | shop.peer = bpc->bpc_peer; | |
8a9f760e | 81 | if (bpc->bpc_has_localif) |
e9e2c950 RZ |
82 | strlcpy(shop.port_name, bpc->bpc_localif, |
83 | sizeof(shop.port_name)); | |
84 | ||
85 | bs = bfd_shop_lookup(shop); | |
86 | } | |
87 | ||
88 | return bs; | |
89 | } | |
90 | ||
91 | static uint32_t ptm_bfd_gen_ID(void) | |
92 | { | |
93 | static uint32_t sessionID = 1; | |
94 | ||
95 | return (sessionID++); | |
96 | } | |
97 | ||
98 | void ptm_bfd_start_xmt_timer(struct bfd_session *bfd, bool is_echo) | |
99 | { | |
100 | uint64_t jitter, xmt_TO; | |
101 | int maxpercent; | |
102 | ||
103 | xmt_TO = is_echo ? bfd->echo_xmt_TO : bfd->xmt_TO; | |
104 | ||
105 | /* | |
106 | * From section 6.5.2: trasmit interval should be randomly jittered | |
107 | * between | |
108 | * 75% and 100% of nominal value, unless detect_mult is 1, then should | |
109 | * be | |
110 | * between 75% and 90%. | |
111 | */ | |
112 | maxpercent = (bfd->detect_mult == 1) ? 16 : 26; | |
113 | jitter = (xmt_TO * (75 + (random() % maxpercent))) / 100; | |
114 | /* XXX remove that division above */ | |
115 | ||
116 | if (is_echo) | |
117 | bfd_echo_xmttimer_update(bfd, jitter); | |
118 | else | |
119 | bfd_xmttimer_update(bfd, jitter); | |
120 | } | |
121 | ||
122 | static void ptm_bfd_echo_xmt_TO(struct bfd_session *bfd) | |
123 | { | |
124 | /* Send the scheduled echo packet */ | |
125 | ptm_bfd_echo_snd(bfd); | |
126 | ||
127 | /* Restart the timer for next time */ | |
128 | ptm_bfd_start_xmt_timer(bfd, true); | |
129 | } | |
130 | ||
131 | void ptm_bfd_xmt_TO(struct bfd_session *bfd, int fbit) | |
132 | { | |
133 | /* Send the scheduled control packet */ | |
134 | ptm_bfd_snd(bfd, fbit); | |
135 | ||
136 | /* Restart the timer for next time */ | |
137 | ptm_bfd_start_xmt_timer(bfd, false); | |
138 | } | |
139 | ||
140 | void ptm_bfd_echo_stop(struct bfd_session *bfd, int polling) | |
141 | { | |
142 | bfd->echo_xmt_TO = 0; | |
143 | bfd->echo_detect_TO = 0; | |
144 | BFD_UNSET_FLAG(bfd->flags, BFD_SESS_FLAG_ECHO_ACTIVE); | |
145 | ||
146 | bfd_echo_xmttimer_delete(bfd); | |
147 | bfd_echo_recvtimer_delete(bfd); | |
148 | ||
149 | if (polling) { | |
150 | bfd->polling = polling; | |
151 | bfd->new_timers.desired_min_tx = bfd->up_min_tx; | |
152 | bfd->new_timers.required_min_rx = bfd->timers.required_min_rx; | |
153 | ptm_bfd_snd(bfd, 0); | |
154 | } | |
155 | } | |
156 | ||
157 | void ptm_bfd_echo_start(struct bfd_session *bfd) | |
158 | { | |
159 | bfd->echo_detect_TO = (bfd->remote_detect_mult * bfd->echo_xmt_TO); | |
451eb5a2 RZ |
160 | if (bfd->echo_detect_TO > 0) |
161 | ptm_bfd_echo_xmt_TO(bfd); | |
e9e2c950 RZ |
162 | |
163 | bfd->polling = 1; | |
164 | bfd->new_timers.desired_min_tx = bfd->up_min_tx; | |
165 | bfd->new_timers.required_min_rx = bfd->timers.required_min_rx; | |
166 | ptm_bfd_snd(bfd, 0); | |
167 | } | |
168 | ||
169 | void ptm_bfd_ses_up(struct bfd_session *bfd) | |
170 | { | |
03e7f088 RZ |
171 | int old_state = bfd->ses_state; |
172 | ||
e9e2c950 RZ |
173 | bfd->local_diag = 0; |
174 | bfd->ses_state = PTM_BFD_UP; | |
175 | bfd->polling = 1; | |
176 | monotime(&bfd->uptime); | |
177 | ||
178 | /* If the peer is capable to receiving Echo pkts */ | |
179 | if (bfd->echo_xmt_TO && !BFD_CHECK_FLAG(bfd->flags, BFD_SESS_FLAG_MH)) { | |
180 | ptm_bfd_echo_start(bfd); | |
181 | } else { | |
182 | bfd->new_timers.desired_min_tx = bfd->up_min_tx; | |
183 | bfd->new_timers.required_min_rx = bfd->timers.required_min_rx; | |
184 | ptm_bfd_snd(bfd, 0); | |
185 | } | |
186 | ||
187 | control_notify(bfd); | |
188 | ||
0684c9b1 RZ |
189 | if (old_state != bfd->ses_state) { |
190 | bfd->stats.session_up++; | |
03e7f088 RZ |
191 | log_info("state-change: [%s] %s -> %s", bs_to_string(bfd), |
192 | state_list[old_state].str, | |
193 | state_list[bfd->ses_state].str); | |
0684c9b1 | 194 | } |
e9e2c950 RZ |
195 | } |
196 | ||
197 | void ptm_bfd_ses_dn(struct bfd_session *bfd, uint8_t diag) | |
198 | { | |
199 | int old_state = bfd->ses_state; | |
200 | ||
201 | bfd->local_diag = diag; | |
202 | bfd->discrs.remote_discr = 0; | |
203 | bfd->ses_state = PTM_BFD_DOWN; | |
204 | bfd->polling = 0; | |
205 | bfd->demand_mode = 0; | |
206 | monotime(&bfd->downtime); | |
207 | ||
208 | ptm_bfd_snd(bfd, 0); | |
209 | ||
210 | /* only signal clients when going from up->down state */ | |
211 | if (old_state == PTM_BFD_UP) | |
212 | control_notify(bfd); | |
213 | ||
e9e2c950 RZ |
214 | /* Stop echo packet transmission if they are active */ |
215 | if (BFD_CHECK_FLAG(bfd->flags, BFD_SESS_FLAG_ECHO_ACTIVE)) | |
216 | ptm_bfd_echo_stop(bfd, 0); | |
03e7f088 | 217 | |
0684c9b1 RZ |
218 | if (old_state != bfd->ses_state) { |
219 | bfd->stats.session_down++; | |
03e7f088 RZ |
220 | log_info("state-change: [%s] %s -> %s reason:%s", |
221 | bs_to_string(bfd), state_list[old_state].str, | |
222 | state_list[bfd->ses_state].str, | |
223 | get_diag_str(bfd->local_diag)); | |
0684c9b1 | 224 | } |
e9e2c950 RZ |
225 | } |
226 | ||
227 | static int ptm_bfd_get_vrf_name(char *port_name, char *vrf_name) | |
228 | { | |
229 | struct bfd_iface *iface; | |
230 | struct bfd_vrf *vrf; | |
231 | ||
232 | if ((port_name == NULL) || (vrf_name == NULL)) | |
233 | return -1; | |
234 | ||
235 | iface = bfd_iface_lookup(port_name); | |
236 | if (iface) { | |
237 | vrf = bfd_vrf_lookup(iface->vrf_id); | |
238 | if (vrf) { | |
239 | strlcpy(vrf_name, vrf->name, sizeof(vrf->name)); | |
240 | return 0; | |
241 | } | |
242 | } | |
243 | return -1; | |
244 | } | |
245 | ||
246 | static struct bfd_session *bfd_find_disc(struct sockaddr_any *sa, | |
247 | uint32_t ldisc) | |
248 | { | |
249 | struct bfd_session *bs; | |
250 | ||
251 | bs = bfd_id_lookup(ldisc); | |
252 | if (bs == NULL) | |
253 | return NULL; | |
254 | ||
255 | /* Remove unused fields. */ | |
256 | switch (sa->sa_sin.sin_family) { | |
257 | case AF_INET: | |
258 | sa->sa_sin.sin_port = 0; | |
259 | if (memcmp(sa, &bs->shop.peer, sizeof(sa->sa_sin)) == 0) | |
260 | return bs; | |
261 | break; | |
262 | case AF_INET6: | |
263 | sa->sa_sin6.sin6_port = 0; | |
264 | if (memcmp(sa, &bs->shop.peer, sizeof(sa->sa_sin6)) == 0) | |
265 | return bs; | |
266 | break; | |
267 | } | |
268 | ||
269 | return NULL; | |
270 | } | |
271 | ||
272 | struct bfd_session *ptm_bfd_sess_find(struct bfd_pkt *cp, char *port_name, | |
273 | struct sockaddr_any *peer, | |
274 | struct sockaddr_any *local, | |
275 | char *vrf_name, bool is_mhop) | |
276 | { | |
277 | struct bfd_session *l_bfd = NULL; | |
278 | struct bfd_mhop_key mhop; | |
279 | struct bfd_shop_key shop; | |
9d63adda | 280 | char vrf_buf[MAXNAMELEN]; |
e9e2c950 | 281 | |
9d63adda RZ |
282 | /* Find our session using the ID signaled by the remote end. */ |
283 | if (cp->discrs.remote_discr) | |
284 | return bfd_find_disc(peer, ntohl(cp->discrs.remote_discr)); | |
285 | ||
286 | /* Search for session without using discriminator. */ | |
287 | if (is_mhop) { | |
288 | memset(&mhop, 0, sizeof(mhop)); | |
289 | mhop.peer = *peer; | |
290 | mhop.local = *local; | |
291 | if (vrf_name && vrf_name[0]) { | |
292 | strlcpy(mhop.vrf_name, vrf_name, sizeof(mhop.vrf_name)); | |
293 | } else if (port_name && port_name[0]) { | |
294 | memset(vrf_buf, 0, sizeof(vrf_buf)); | |
295 | if (ptm_bfd_get_vrf_name(port_name, vrf_buf) != -1) | |
03e7f088 RZ |
296 | strlcpy(mhop.vrf_name, vrf_buf, |
297 | sizeof(mhop.vrf_name)); | |
e9e2c950 RZ |
298 | } |
299 | ||
9d63adda RZ |
300 | l_bfd = bfd_mhop_lookup(mhop); |
301 | } else { | |
302 | memset(&shop, 0, sizeof(shop)); | |
303 | shop.peer = *peer; | |
304 | if (port_name && port_name[0]) | |
03e7f088 RZ |
305 | strlcpy(shop.port_name, port_name, |
306 | sizeof(shop.port_name)); | |
9d63adda RZ |
307 | |
308 | l_bfd = bfd_shop_lookup(shop); | |
e9e2c950 RZ |
309 | } |
310 | ||
9d63adda RZ |
311 | /* XXX maybe remoteDiscr should be checked for remoteHeard cases. */ |
312 | return l_bfd; | |
e9e2c950 RZ |
313 | } |
314 | ||
e9e2c950 RZ |
315 | int bfd_xmt_cb(struct thread *t) |
316 | { | |
317 | struct bfd_session *bs = THREAD_ARG(t); | |
318 | ||
319 | ptm_bfd_xmt_TO(bs, 0); | |
320 | ||
321 | return 0; | |
322 | } | |
323 | ||
324 | int bfd_echo_xmt_cb(struct thread *t) | |
325 | { | |
326 | struct bfd_session *bs = THREAD_ARG(t); | |
327 | ||
451eb5a2 RZ |
328 | if (bs->echo_xmt_TO > 0) |
329 | ptm_bfd_echo_xmt_TO(bs); | |
e9e2c950 RZ |
330 | |
331 | return 0; | |
332 | } | |
333 | ||
334 | /* Was ptm_bfd_detect_TO() */ | |
335 | int bfd_recvtimer_cb(struct thread *t) | |
336 | { | |
337 | struct bfd_session *bs = THREAD_ARG(t); | |
e9e2c950 RZ |
338 | |
339 | switch (bs->ses_state) { | |
340 | case PTM_BFD_INIT: | |
341 | case PTM_BFD_UP: | |
40675ea9 | 342 | ptm_bfd_ses_dn(bs, BD_CONTROL_EXPIRED); |
e9e2c950 RZ |
343 | bfd_recvtimer_update(bs); |
344 | break; | |
345 | ||
346 | default: | |
347 | /* Second detect time expiration, zero remote discr (section | |
348 | * 6.5.1) | |
349 | */ | |
350 | bs->discrs.remote_discr = 0; | |
351 | break; | |
352 | } | |
353 | ||
e9e2c950 RZ |
354 | return 0; |
355 | } | |
356 | ||
357 | /* Was ptm_bfd_echo_detect_TO() */ | |
358 | int bfd_echo_recvtimer_cb(struct thread *t) | |
359 | { | |
360 | struct bfd_session *bs = THREAD_ARG(t); | |
e9e2c950 RZ |
361 | |
362 | switch (bs->ses_state) { | |
363 | case PTM_BFD_INIT: | |
364 | case PTM_BFD_UP: | |
40675ea9 | 365 | ptm_bfd_ses_dn(bs, BD_ECHO_FAILED); |
e9e2c950 RZ |
366 | break; |
367 | } | |
368 | ||
e9e2c950 RZ |
369 | return 0; |
370 | } | |
371 | ||
372 | static struct bfd_session *bfd_session_new(int sd) | |
373 | { | |
374 | struct bfd_session *bs; | |
375 | ||
376 | bs = XCALLOC(MTYPE_BFDD_CONFIG, sizeof(*bs)); | |
377 | if (bs == NULL) | |
378 | return NULL; | |
379 | ||
380 | QOBJ_REG(bs, bfd_session); | |
381 | ||
382 | bs->up_min_tx = BFD_DEFDESIREDMINTX; | |
383 | bs->timers.required_min_rx = BFD_DEFREQUIREDMINRX; | |
384 | bs->timers.required_min_echo = BFD_DEF_REQ_MIN_ECHO; | |
385 | bs->detect_mult = BFD_DEFDETECTMULT; | |
386 | bs->mh_ttl = BFD_DEF_MHOP_TTL; | |
387 | ||
388 | bs->sock = sd; | |
389 | monotime(&bs->uptime); | |
390 | bs->downtime = bs->uptime; | |
391 | ||
392 | return bs; | |
393 | } | |
394 | ||
395 | int bfd_session_update_label(struct bfd_session *bs, const char *nlabel) | |
396 | { | |
397 | /* New label treatment: | |
398 | * - Check if the label is taken; | |
399 | * - Try to allocate the memory for it and register; | |
400 | */ | |
401 | if (bs->pl == NULL) { | |
402 | if (pl_find(nlabel) != NULL) { | |
403 | /* Someone is already using it. */ | |
404 | return -1; | |
405 | } | |
406 | ||
407 | if (pl_new(nlabel, bs) == NULL) | |
408 | return -1; | |
409 | ||
410 | return 0; | |
411 | } | |
412 | ||
413 | /* | |
414 | * Test label change consistency: | |
415 | * - Do nothing if it's the same label; | |
416 | * - Check if the future label is already taken; | |
417 | * - Change label; | |
418 | */ | |
419 | if (strcmp(nlabel, bs->pl->pl_label) == 0) | |
420 | return -1; | |
421 | if (pl_find(nlabel) != NULL) | |
422 | return -1; | |
423 | ||
424 | strlcpy(bs->pl->pl_label, nlabel, sizeof(bs->pl->pl_label)); | |
425 | return 0; | |
426 | } | |
427 | ||
428 | static void _bfd_session_update(struct bfd_session *bs, | |
429 | struct bfd_peer_cfg *bpc) | |
430 | { | |
431 | if (bpc->bpc_echo) { | |
432 | /* Check if echo mode is already active. */ | |
433 | if (BFD_CHECK_FLAG(bs->flags, BFD_SESS_FLAG_ECHO)) | |
434 | goto skip_echo; | |
435 | ||
436 | BFD_SET_FLAG(bs->flags, BFD_SESS_FLAG_ECHO); | |
437 | ptm_bfd_echo_start(bs); | |
438 | ||
439 | /* Activate/update echo receive timeout timer. */ | |
440 | bfd_echo_recvtimer_update(bs); | |
441 | } else { | |
442 | /* Check if echo mode is already disabled. */ | |
443 | if (!BFD_CHECK_FLAG(bs->flags, BFD_SESS_FLAG_ECHO)) | |
444 | goto skip_echo; | |
445 | ||
446 | BFD_UNSET_FLAG(bs->flags, BFD_SESS_FLAG_ECHO); | |
447 | ptm_bfd_echo_stop(bs, 0); | |
448 | } | |
449 | ||
450 | skip_echo: | |
451 | if (bpc->bpc_has_txinterval) | |
452 | bs->up_min_tx = bpc->bpc_txinterval * 1000; | |
453 | ||
454 | if (bpc->bpc_has_recvinterval) | |
455 | bs->timers.required_min_rx = bpc->bpc_recvinterval * 1000; | |
456 | ||
457 | if (bpc->bpc_has_detectmultiplier) | |
458 | bs->detect_mult = bpc->bpc_detectmultiplier; | |
459 | ||
460 | if (bpc->bpc_has_echointerval) | |
461 | bs->timers.required_min_echo = bpc->bpc_echointerval * 1000; | |
462 | ||
463 | if (bpc->bpc_has_label) | |
464 | bfd_session_update_label(bs, bpc->bpc_label); | |
465 | ||
466 | if (bpc->bpc_shutdown) { | |
467 | /* Check if already shutdown. */ | |
468 | if (BFD_CHECK_FLAG(bs->flags, BFD_SESS_FLAG_SHUTDOWN)) | |
469 | return; | |
470 | ||
471 | BFD_SET_FLAG(bs->flags, BFD_SESS_FLAG_SHUTDOWN); | |
472 | ||
473 | /* Disable all events. */ | |
474 | bfd_recvtimer_delete(bs); | |
475 | bfd_echo_recvtimer_delete(bs); | |
476 | bfd_xmttimer_delete(bs); | |
477 | bfd_echo_xmttimer_delete(bs); | |
478 | ||
479 | /* Change and notify state change. */ | |
480 | bs->ses_state = PTM_BFD_ADM_DOWN; | |
481 | control_notify(bs); | |
482 | ||
483 | ptm_bfd_snd(bs, 0); | |
484 | } else { | |
485 | /* Check if already working. */ | |
486 | if (!BFD_CHECK_FLAG(bs->flags, BFD_SESS_FLAG_SHUTDOWN)) | |
487 | return; | |
488 | ||
489 | BFD_UNSET_FLAG(bs->flags, BFD_SESS_FLAG_SHUTDOWN); | |
490 | ||
491 | /* Change and notify state change. */ | |
492 | bs->ses_state = PTM_BFD_DOWN; | |
493 | control_notify(bs); | |
494 | ||
495 | /* Enable all timers. */ | |
496 | bfd_recvtimer_update(bs); | |
497 | bfd_xmttimer_update(bs, bs->xmt_TO); | |
498 | if (BFD_CHECK_FLAG(bs->flags, BFD_SESS_FLAG_ECHO)) { | |
499 | bfd_echo_recvtimer_update(bs); | |
500 | bfd_echo_xmttimer_update(bs, bs->echo_xmt_TO); | |
501 | } | |
502 | } | |
503 | } | |
504 | ||
505 | static int bfd_session_update(struct bfd_session *bs, struct bfd_peer_cfg *bpc) | |
506 | { | |
507 | /* User didn't want to update, return failure. */ | |
508 | if (bpc->bpc_createonly) | |
509 | return -1; | |
510 | ||
511 | _bfd_session_update(bs, bpc); | |
512 | ||
e9e2c950 RZ |
513 | control_notify_config(BCM_NOTIFY_CONFIG_UPDATE, bs); |
514 | ||
515 | return 0; | |
516 | } | |
517 | ||
518 | static void bfd_session_free(struct bfd_session *bs) | |
519 | { | |
520 | if (bs->sock != -1) | |
521 | close(bs->sock); | |
522 | ||
523 | bfd_recvtimer_delete(bs); | |
524 | bfd_echo_recvtimer_delete(bs); | |
525 | bfd_xmttimer_delete(bs); | |
526 | bfd_echo_xmttimer_delete(bs); | |
527 | ||
528 | bfd_id_delete(bs->discrs.my_discr); | |
529 | if (BFD_CHECK_FLAG(bs->flags, BFD_SESS_FLAG_MH)) | |
530 | bfd_mhop_delete(bs->mhop); | |
531 | else | |
532 | bfd_shop_delete(bs->shop); | |
533 | ||
534 | pl_free(bs->pl); | |
535 | ||
536 | QOBJ_UNREG(bs); | |
537 | XFREE(MTYPE_BFDD_CONFIG, bs); | |
538 | } | |
539 | ||
540 | struct bfd_session *ptm_bfd_sess_new(struct bfd_peer_cfg *bpc) | |
541 | { | |
542 | struct bfd_session *bfd, *l_bfd; | |
543 | int psock; | |
544 | ||
545 | /* check to see if this needs a new session */ | |
546 | l_bfd = bs_peer_find(bpc); | |
547 | if (l_bfd) { | |
548 | /* Requesting a duplicated peer means update configuration. */ | |
549 | if (bfd_session_update(l_bfd, bpc) == 0) | |
550 | return l_bfd; | |
551 | else | |
552 | return NULL; | |
553 | } | |
554 | ||
555 | /* | |
556 | * Get socket for transmitting control packets. Note that if we | |
557 | * could use the destination port (3784) for the source | |
558 | * port we wouldn't need a socket per session. | |
559 | */ | |
560 | if (bpc->bpc_ipv4) { | |
561 | psock = bp_peer_socket(bpc); | |
03e7f088 | 562 | if (psock == -1) |
e9e2c950 | 563 | return NULL; |
e9e2c950 RZ |
564 | } else { |
565 | psock = bp_peer_socketv6(bpc); | |
03e7f088 | 566 | if (psock == -1) |
e9e2c950 | 567 | return NULL; |
e9e2c950 RZ |
568 | } |
569 | ||
570 | /* Get memory */ | |
571 | bfd = bfd_session_new(psock); | |
572 | if (bfd == NULL) { | |
03e7f088 | 573 | log_error("session-new: allocation failed"); |
e9e2c950 RZ |
574 | return NULL; |
575 | } | |
576 | ||
577 | if (bpc->bpc_has_localif && !bpc->bpc_mhop) { | |
578 | bfd->ifindex = ptm_bfd_fetch_ifindex(bpc->bpc_localif); | |
579 | ptm_bfd_fetch_local_mac(bpc->bpc_localif, bfd->local_mac); | |
580 | } | |
581 | ||
43adc702 | 582 | if (bpc->bpc_ipv4 == false) { |
e9e2c950 RZ |
583 | BFD_SET_FLAG(bfd->flags, BFD_SESS_FLAG_IPV6); |
584 | ||
43adc702 RZ |
585 | /* Set the IPv6 scope id for link-local addresses. */ |
586 | if (IN6_IS_ADDR_LINKLOCAL(&bpc->bpc_local.sa_sin6.sin6_addr)) | |
587 | bpc->bpc_local.sa_sin6.sin6_scope_id = bfd->ifindex; | |
588 | if (IN6_IS_ADDR_LINKLOCAL(&bpc->bpc_peer.sa_sin6.sin6_addr)) | |
589 | bpc->bpc_peer.sa_sin6.sin6_scope_id = bfd->ifindex; | |
590 | } | |
591 | ||
e9e2c950 RZ |
592 | /* Initialize the session */ |
593 | bfd->ses_state = PTM_BFD_DOWN; | |
594 | bfd->discrs.my_discr = ptm_bfd_gen_ID(); | |
595 | bfd->discrs.remote_discr = 0; | |
596 | bfd->local_ip = bpc->bpc_local; | |
597 | bfd->local_address = bpc->bpc_local; | |
598 | bfd->timers.desired_min_tx = bfd->up_min_tx; | |
599 | bfd->detect_TO = (bfd->detect_mult * BFD_DEF_SLOWTX); | |
600 | ||
601 | /* Use detect_TO first for slow detection, then use recvtimer_update. */ | |
602 | bfd_recvtimer_update(bfd); | |
603 | ||
604 | bfd_id_insert(bfd); | |
605 | ||
606 | if (bpc->bpc_mhop) { | |
607 | BFD_SET_FLAG(bfd->flags, BFD_SESS_FLAG_MH); | |
608 | bfd->mhop.peer = bpc->bpc_peer; | |
609 | bfd->mhop.local = bpc->bpc_local; | |
610 | if (bpc->bpc_has_vrfname) | |
611 | strlcpy(bfd->mhop.vrf_name, bpc->bpc_vrfname, | |
612 | sizeof(bfd->mhop.vrf_name)); | |
613 | ||
614 | bfd_mhop_insert(bfd); | |
615 | } else { | |
616 | bfd->shop.peer = bpc->bpc_peer; | |
8a9f760e | 617 | if (bpc->bpc_has_localif) |
e9e2c950 RZ |
618 | strlcpy(bfd->shop.port_name, bpc->bpc_localif, |
619 | sizeof(bfd->shop.port_name)); | |
620 | ||
621 | bfd_shop_insert(bfd); | |
622 | } | |
623 | ||
e9e2c950 RZ |
624 | /* |
625 | * XXX: session update triggers echo start, so we must have our | |
626 | * discriminator ID set first. | |
627 | */ | |
628 | _bfd_session_update(bfd, bpc); | |
629 | ||
630 | /* Start transmitting with slow interval until peer responds */ | |
631 | bfd->xmt_TO = BFD_DEF_SLOWTX; | |
632 | ||
633 | ptm_bfd_xmt_TO(bfd, 0); | |
634 | ||
03e7f088 | 635 | log_info("session-new: %s", bs_to_string(bfd)); |
e9e2c950 RZ |
636 | |
637 | control_notify_config(BCM_NOTIFY_CONFIG_ADD, bfd); | |
638 | ||
639 | return bfd; | |
640 | } | |
641 | ||
642 | int ptm_bfd_ses_del(struct bfd_peer_cfg *bpc) | |
643 | { | |
644 | struct bfd_session *bs; | |
645 | ||
646 | /* Find session and call free(). */ | |
647 | bs = bs_peer_find(bpc); | |
648 | if (bs == NULL) | |
649 | return -1; | |
650 | ||
651 | /* This pointer is being referenced, don't let it be deleted. */ | |
652 | if (bs->refcount > 0) { | |
03e7f088 RZ |
653 | log_error("session-delete: refcount failure: %" PRIu64 |
654 | " references", | |
655 | bs->refcount); | |
e9e2c950 RZ |
656 | return -1; |
657 | } | |
658 | ||
03e7f088 | 659 | log_info("session-delete: %s", bs_to_string(bs)); |
e9e2c950 RZ |
660 | |
661 | control_notify_config(BCM_NOTIFY_CONFIG_DELETE, bs); | |
662 | ||
663 | bfd_session_free(bs); | |
664 | ||
665 | return 0; | |
666 | } | |
667 | ||
d3f3a2c4 RZ |
668 | void bfd_set_polling(struct bfd_session *bs) |
669 | { | |
670 | bs->new_timers.desired_min_tx = bs->up_min_tx; | |
671 | bs->new_timers.required_min_rx = bs->timers.required_min_rx; | |
672 | bs->new_timers.required_min_echo = bs->timers.required_min_echo; | |
673 | bs->polling = 1; | |
674 | } | |
675 | ||
e9e2c950 RZ |
676 | |
677 | /* | |
678 | * Helper functions. | |
679 | */ | |
680 | static const char *get_diag_str(int diag) | |
681 | { | |
682 | for (int i = 0; diag_list[i].str; i++) { | |
683 | if (diag_list[i].type == diag) | |
684 | return diag_list[i].str; | |
685 | } | |
686 | return "N/A"; | |
687 | } | |
688 | ||
689 | const char *satostr(struct sockaddr_any *sa) | |
690 | { | |
691 | #define INETSTR_BUFCOUNT 8 | |
692 | static char buf[INETSTR_BUFCOUNT][INET6_ADDRSTRLEN]; | |
693 | static int bufidx; | |
694 | struct sockaddr_in *sin = &sa->sa_sin; | |
695 | struct sockaddr_in6 *sin6 = &sa->sa_sin6; | |
696 | ||
697 | bufidx += (bufidx + 1) % INETSTR_BUFCOUNT; | |
698 | buf[bufidx][0] = 0; | |
699 | ||
700 | switch (sin->sin_family) { | |
701 | case AF_INET: | |
702 | inet_ntop(AF_INET, &sin->sin_addr, buf[bufidx], | |
703 | sizeof(buf[bufidx])); | |
704 | break; | |
705 | case AF_INET6: | |
706 | inet_ntop(AF_INET6, &sin6->sin6_addr, buf[bufidx], | |
707 | sizeof(buf[bufidx])); | |
708 | break; | |
709 | ||
710 | default: | |
711 | strlcpy(buf[bufidx], "unknown", sizeof(buf[bufidx])); | |
712 | break; | |
713 | } | |
714 | ||
715 | return buf[bufidx]; | |
716 | } | |
717 | ||
718 | const char *diag2str(uint8_t diag) | |
719 | { | |
720 | switch (diag) { | |
721 | case 0: | |
722 | return "ok"; | |
723 | case 1: | |
724 | return "control detection time expired"; | |
725 | case 2: | |
726 | return "echo function failed"; | |
727 | case 3: | |
728 | return "neighbor signaled session down"; | |
729 | case 4: | |
730 | return "forwarding plane reset"; | |
731 | case 5: | |
732 | return "path down"; | |
733 | case 6: | |
734 | return "concatenated path down"; | |
735 | case 7: | |
736 | return "administratively down"; | |
737 | case 8: | |
738 | return "reverse concatenated path down"; | |
739 | default: | |
740 | return "unknown"; | |
741 | } | |
742 | } | |
743 | ||
744 | int strtosa(const char *addr, struct sockaddr_any *sa) | |
745 | { | |
746 | memset(sa, 0, sizeof(*sa)); | |
747 | ||
748 | if (inet_pton(AF_INET, addr, &sa->sa_sin.sin_addr) == 1) { | |
749 | sa->sa_sin.sin_family = AF_INET; | |
750 | #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN | |
751 | sa->sa_sin.sin_len = sizeof(sa->sa_sin); | |
752 | #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */ | |
753 | return 0; | |
754 | } | |
755 | ||
756 | if (inet_pton(AF_INET6, addr, &sa->sa_sin6.sin6_addr) == 1) { | |
757 | sa->sa_sin6.sin6_family = AF_INET6; | |
758 | #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN | |
759 | sa->sa_sin6.sin6_len = sizeof(sa->sa_sin6); | |
760 | #endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */ | |
761 | return 0; | |
762 | } | |
763 | ||
764 | return -1; | |
765 | } | |
766 | ||
767 | void integer2timestr(uint64_t time, char *buf, size_t buflen) | |
768 | { | |
769 | unsigned int year, month, day, hour, minute, second; | |
770 | int rv; | |
771 | ||
772 | #define MINUTES (60) | |
773 | #define HOURS (24 * MINUTES) | |
774 | #define DAYS (30 * HOURS) | |
775 | #define MONTHS (12 * DAYS) | |
776 | #define YEARS (MONTHS) | |
777 | if (time >= YEARS) { | |
778 | year = time / YEARS; | |
779 | time -= year * YEARS; | |
780 | ||
781 | rv = snprintf(buf, buflen, "%u year(s), ", year); | |
782 | buf += rv; | |
783 | buflen -= rv; | |
784 | } | |
785 | if (time >= MONTHS) { | |
786 | month = time / MONTHS; | |
787 | time -= month * MONTHS; | |
788 | ||
789 | rv = snprintf(buf, buflen, "%u month(s), ", month); | |
790 | buf += rv; | |
791 | buflen -= rv; | |
792 | } | |
793 | if (time >= DAYS) { | |
794 | day = time / DAYS; | |
795 | time -= day * DAYS; | |
796 | ||
797 | rv = snprintf(buf, buflen, "%u day(s), ", day); | |
798 | buf += rv; | |
799 | buflen -= rv; | |
800 | } | |
801 | if (time >= HOURS) { | |
802 | hour = time / HOURS; | |
803 | time -= hour * HOURS; | |
804 | ||
805 | rv = snprintf(buf, buflen, "%u hour(s), ", hour); | |
806 | buf += rv; | |
807 | buflen -= rv; | |
808 | } | |
809 | if (time >= MINUTES) { | |
810 | minute = time / MINUTES; | |
811 | time -= minute * MINUTES; | |
812 | ||
813 | rv = snprintf(buf, buflen, "%u minute(s), ", minute); | |
814 | buf += rv; | |
815 | buflen -= rv; | |
816 | } | |
817 | second = time % MINUTES; | |
818 | snprintf(buf, buflen, "%u second(s)", second); | |
819 | } | |
820 | ||
03e7f088 RZ |
821 | const char *bs_to_string(struct bfd_session *bs) |
822 | { | |
823 | static char buf[256]; | |
824 | int pos; | |
825 | bool is_mhop = BFD_CHECK_FLAG(bs->flags, BFD_SESS_FLAG_MH); | |
826 | ||
827 | pos = snprintf(buf, sizeof(buf), "mhop:%s", is_mhop ? "yes" : "no"); | |
828 | if (BFD_CHECK_FLAG(bs->flags, BFD_SESS_FLAG_MH)) { | |
829 | pos += snprintf(buf + pos, sizeof(buf) - pos, | |
830 | " peer:%s local:%s", satostr(&bs->mhop.peer), | |
831 | satostr(&bs->mhop.local)); | |
832 | ||
833 | if (bs->mhop.vrf_name[0]) | |
834 | snprintf(buf + pos, sizeof(buf) - pos, " vrf:%s", | |
835 | bs->mhop.vrf_name); | |
836 | } else { | |
837 | pos += snprintf(buf + pos, sizeof(buf) - pos, " peer:%s", | |
838 | satostr(&bs->shop.peer)); | |
839 | ||
840 | if (bs->local_address.sa_sin.sin_family) | |
841 | pos += snprintf(buf + pos, sizeof(buf) - pos, | |
842 | " local:%s", | |
843 | satostr(&bs->local_address)); | |
844 | ||
845 | if (bs->shop.port_name[0]) | |
846 | snprintf(buf + pos, sizeof(buf) - pos, " interface:%s", | |
847 | bs->shop.port_name); | |
848 | } | |
849 | ||
850 | return buf; | |
851 | } | |
852 | ||
e9e2c950 RZ |
853 | |
854 | /* | |
855 | * BFD hash data structures to find sessions. | |
856 | */ | |
857 | static struct hash *bfd_id_hash; | |
858 | static struct hash *bfd_shop_hash; | |
859 | static struct hash *bfd_mhop_hash; | |
860 | static struct hash *bfd_vrf_hash; | |
861 | static struct hash *bfd_iface_hash; | |
862 | ||
863 | static unsigned int bfd_id_hash_do(void *p); | |
e9e2c950 | 864 | static unsigned int bfd_shop_hash_do(void *p); |
e9e2c950 | 865 | static unsigned int bfd_mhop_hash_do(void *p); |
e9e2c950 | 866 | static unsigned int bfd_vrf_hash_do(void *p); |
e9e2c950 | 867 | static unsigned int bfd_iface_hash_do(void *p); |
e9e2c950 RZ |
868 | |
869 | static void _shop_key(struct bfd_session *bs, const struct bfd_shop_key *shop); | |
870 | static void _shop_key2(struct bfd_session *bs, const struct bfd_shop_key *shop); | |
871 | static void _mhop_key(struct bfd_session *bs, const struct bfd_mhop_key *mhop); | |
872 | static int _iface_key(struct bfd_iface *iface, const char *ifname); | |
873 | ||
874 | static void _bfd_free(struct hash_backet *hb, | |
875 | void *arg __attribute__((__unused__))); | |
876 | static void _vrf_free(void *arg); | |
877 | static void _iface_free(void *arg); | |
878 | ||
879 | /* BFD hash for our discriminator. */ | |
880 | static unsigned int bfd_id_hash_do(void *p) | |
881 | { | |
882 | struct bfd_session *bs = p; | |
883 | ||
884 | return jhash_1word(bs->discrs.my_discr, 0); | |
885 | } | |
886 | ||
74df8d6d | 887 | static bool bfd_id_hash_cmp(const void *n1, const void *n2) |
e9e2c950 RZ |
888 | { |
889 | const struct bfd_session *bs1 = n1, *bs2 = n2; | |
890 | ||
891 | return bs1->discrs.my_discr == bs2->discrs.my_discr; | |
892 | } | |
893 | ||
894 | /* BFD hash for single hop. */ | |
895 | static unsigned int bfd_shop_hash_do(void *p) | |
896 | { | |
897 | struct bfd_session *bs = p; | |
898 | ||
899 | return jhash(&bs->shop, sizeof(bs->shop), 0); | |
900 | } | |
901 | ||
74df8d6d | 902 | static bool bfd_shop_hash_cmp(const void *n1, const void *n2) |
e9e2c950 RZ |
903 | { |
904 | const struct bfd_session *bs1 = n1, *bs2 = n2; | |
905 | ||
906 | return memcmp(&bs1->shop, &bs2->shop, sizeof(bs1->shop)) == 0; | |
907 | } | |
908 | ||
909 | /* BFD hash for multi hop. */ | |
910 | static unsigned int bfd_mhop_hash_do(void *p) | |
911 | { | |
912 | struct bfd_session *bs = p; | |
913 | ||
914 | return jhash(&bs->mhop, sizeof(bs->mhop), 0); | |
915 | } | |
916 | ||
74df8d6d | 917 | static bool bfd_mhop_hash_cmp(const void *n1, const void *n2) |
e9e2c950 RZ |
918 | { |
919 | const struct bfd_session *bs1 = n1, *bs2 = n2; | |
920 | ||
921 | return memcmp(&bs1->mhop, &bs2->mhop, sizeof(bs1->mhop)) == 0; | |
922 | } | |
923 | ||
924 | /* BFD hash for VRFs. */ | |
925 | static unsigned int bfd_vrf_hash_do(void *p) | |
926 | { | |
927 | struct bfd_vrf *vrf = p; | |
928 | ||
929 | return jhash_1word(vrf->vrf_id, 0); | |
930 | } | |
931 | ||
74df8d6d | 932 | static bool bfd_vrf_hash_cmp(const void *n1, const void *n2) |
e9e2c950 RZ |
933 | { |
934 | const struct bfd_vrf *v1 = n1, *v2 = n2; | |
935 | ||
936 | return v1->vrf_id == v2->vrf_id; | |
937 | } | |
938 | ||
939 | /* BFD hash for interfaces. */ | |
940 | static unsigned int bfd_iface_hash_do(void *p) | |
941 | { | |
942 | struct bfd_iface *iface = p; | |
943 | ||
944 | return string_hash_make(iface->ifname); | |
945 | } | |
946 | ||
74df8d6d | 947 | static bool bfd_iface_hash_cmp(const void *n1, const void *n2) |
e9e2c950 RZ |
948 | { |
949 | const struct bfd_iface *i1 = n1, *i2 = n2; | |
950 | ||
951 | return strcmp(i1->ifname, i2->ifname) == 0; | |
952 | } | |
953 | ||
954 | /* Helper functions */ | |
955 | static void _shop_key(struct bfd_session *bs, const struct bfd_shop_key *shop) | |
956 | { | |
957 | bs->shop = *shop; | |
958 | ||
959 | /* Remove unused fields. */ | |
960 | switch (bs->shop.peer.sa_sin.sin_family) { | |
961 | case AF_INET: | |
962 | bs->shop.peer.sa_sin.sin_port = 0; | |
963 | break; | |
964 | case AF_INET6: | |
965 | bs->shop.peer.sa_sin6.sin6_port = 0; | |
966 | break; | |
967 | } | |
968 | } | |
969 | ||
970 | static void _shop_key2(struct bfd_session *bs, const struct bfd_shop_key *shop) | |
971 | { | |
972 | _shop_key(bs, shop); | |
973 | memset(bs->shop.port_name, 0, sizeof(bs->shop.port_name)); | |
974 | } | |
975 | ||
976 | static void _mhop_key(struct bfd_session *bs, const struct bfd_mhop_key *mhop) | |
977 | { | |
978 | bs->mhop = *mhop; | |
979 | ||
980 | /* Remove unused fields. */ | |
981 | switch (bs->mhop.peer.sa_sin.sin_family) { | |
982 | case AF_INET: | |
983 | bs->mhop.peer.sa_sin.sin_port = 0; | |
984 | bs->mhop.local.sa_sin.sin_port = 0; | |
985 | break; | |
986 | case AF_INET6: | |
987 | bs->mhop.peer.sa_sin6.sin6_port = 0; | |
988 | bs->mhop.local.sa_sin6.sin6_port = 0; | |
989 | break; | |
990 | } | |
991 | } | |
992 | ||
993 | static int _iface_key(struct bfd_iface *iface, const char *ifname) | |
994 | { | |
995 | size_t slen = sizeof(iface->ifname); | |
996 | ||
997 | memset(iface->ifname, 0, slen); | |
998 | if (strlcpy(iface->ifname, ifname, slen) >= slen) | |
999 | return -1; | |
1000 | ||
1001 | return 0; | |
1002 | } | |
1003 | ||
e9e2c950 RZ |
1004 | /* |
1005 | * Hash public interface / exported functions. | |
1006 | */ | |
1007 | ||
1008 | /* Lookup functions. */ | |
1009 | struct bfd_session *bfd_id_lookup(uint32_t id) | |
1010 | { | |
1011 | struct bfd_session bs; | |
1012 | ||
1013 | bs.discrs.my_discr = id; | |
1014 | ||
1015 | return hash_lookup(bfd_id_hash, &bs); | |
1016 | } | |
1017 | ||
1018 | struct bfd_session *bfd_shop_lookup(struct bfd_shop_key shop) | |
1019 | { | |
1020 | struct bfd_session bs, *bsp; | |
1021 | ||
1022 | _shop_key(&bs, &shop); | |
1023 | ||
1024 | bsp = hash_lookup(bfd_shop_hash, &bs); | |
1025 | if (bsp == NULL && bs.shop.port_name[0] != 0) { | |
1026 | /* | |
1027 | * Since the local interface spec is optional, try | |
1028 | * searching the key without it as well. | |
1029 | */ | |
1030 | _shop_key2(&bs, &shop); | |
1031 | bsp = hash_lookup(bfd_shop_hash, &bs); | |
1032 | } | |
1033 | ||
1034 | return bsp; | |
1035 | } | |
1036 | ||
1037 | struct bfd_session *bfd_mhop_lookup(struct bfd_mhop_key mhop) | |
1038 | { | |
1039 | struct bfd_session bs; | |
1040 | ||
1041 | _mhop_key(&bs, &mhop); | |
1042 | ||
2055ea09 | 1043 | return hash_lookup(bfd_mhop_hash, &bs); |
e9e2c950 RZ |
1044 | } |
1045 | ||
1046 | struct bfd_vrf *bfd_vrf_lookup(int vrf_id) | |
1047 | { | |
1048 | struct bfd_vrf vrf; | |
1049 | ||
1050 | vrf.vrf_id = vrf_id; | |
1051 | ||
1052 | return hash_lookup(bfd_vrf_hash, &vrf); | |
1053 | } | |
1054 | ||
1055 | struct bfd_iface *bfd_iface_lookup(const char *ifname) | |
1056 | { | |
1057 | struct bfd_iface iface; | |
1058 | ||
1059 | if (_iface_key(&iface, ifname) != 0) | |
1060 | return NULL; | |
1061 | ||
1062 | return hash_lookup(bfd_iface_hash, &iface); | |
1063 | } | |
1064 | ||
1065 | /* | |
1066 | * Delete functions. | |
1067 | * | |
1068 | * Delete functions searches and remove the item from the hash and | |
1069 | * returns a pointer to the removed item data. If the item was not found | |
1070 | * then it returns NULL. | |
1071 | * | |
1072 | * The data stored inside the hash is not free()ed, so you must do it | |
1073 | * manually after getting the pointer back. | |
1074 | */ | |
1075 | struct bfd_session *bfd_id_delete(uint32_t id) | |
1076 | { | |
1077 | struct bfd_session bs; | |
1078 | ||
1079 | bs.discrs.my_discr = id; | |
1080 | ||
1081 | return hash_release(bfd_id_hash, &bs); | |
1082 | } | |
1083 | ||
1084 | struct bfd_session *bfd_shop_delete(struct bfd_shop_key shop) | |
1085 | { | |
1086 | struct bfd_session bs, *bsp; | |
1087 | ||
1088 | _shop_key(&bs, &shop); | |
1089 | bsp = hash_release(bfd_shop_hash, &bs); | |
1090 | if (bsp == NULL && shop.port_name[0] != 0) { | |
1091 | /* | |
1092 | * Since the local interface spec is optional, try | |
1093 | * searching the key without it as well. | |
1094 | */ | |
1095 | _shop_key2(&bs, &shop); | |
1096 | bsp = hash_release(bfd_shop_hash, &bs); | |
1097 | } | |
1098 | ||
1099 | return bsp; | |
1100 | } | |
1101 | ||
1102 | struct bfd_session *bfd_mhop_delete(struct bfd_mhop_key mhop) | |
1103 | { | |
1104 | struct bfd_session bs; | |
1105 | ||
1106 | _mhop_key(&bs, &mhop); | |
1107 | ||
1108 | return hash_release(bfd_mhop_hash, &bs); | |
1109 | } | |
1110 | ||
1111 | struct bfd_vrf *bfd_vrf_delete(int vrf_id) | |
1112 | { | |
1113 | struct bfd_vrf vrf; | |
1114 | ||
1115 | vrf.vrf_id = vrf_id; | |
1116 | ||
1117 | return hash_release(bfd_vrf_hash, &vrf); | |
1118 | } | |
1119 | ||
1120 | struct bfd_iface *bfd_iface_delete(const char *ifname) | |
1121 | { | |
1122 | struct bfd_iface iface; | |
1123 | ||
1124 | if (_iface_key(&iface, ifname) != 0) | |
1125 | return NULL; | |
1126 | ||
1127 | return hash_release(bfd_iface_hash, &iface); | |
1128 | } | |
1129 | ||
1130 | /* Iteration functions. */ | |
1131 | void bfd_id_iterate(hash_iter_func hif, void *arg) | |
1132 | { | |
1133 | hash_iterate(bfd_id_hash, hif, arg); | |
1134 | } | |
1135 | ||
1136 | void bfd_shop_iterate(hash_iter_func hif, void *arg) | |
1137 | { | |
1138 | hash_iterate(bfd_shop_hash, hif, arg); | |
1139 | } | |
1140 | ||
1141 | void bfd_mhop_iterate(hash_iter_func hif, void *arg) | |
1142 | { | |
1143 | hash_iterate(bfd_mhop_hash, hif, arg); | |
1144 | } | |
1145 | ||
1146 | void bfd_vrf_iterate(hash_iter_func hif, void *arg) | |
1147 | { | |
1148 | hash_iterate(bfd_vrf_hash, hif, arg); | |
1149 | } | |
1150 | ||
1151 | void bfd_iface_iterate(hash_iter_func hif, void *arg) | |
1152 | { | |
1153 | hash_iterate(bfd_iface_hash, hif, arg); | |
1154 | } | |
1155 | ||
1156 | /* | |
1157 | * Insert functions. | |
1158 | * | |
1159 | * Inserts session into hash and returns `true` on success, otherwise | |
1160 | * `false`. | |
1161 | */ | |
1162 | bool bfd_id_insert(struct bfd_session *bs) | |
1163 | { | |
1164 | return (hash_get(bfd_id_hash, bs, hash_alloc_intern) == bs); | |
1165 | } | |
1166 | ||
1167 | bool bfd_shop_insert(struct bfd_session *bs) | |
1168 | { | |
1169 | return (hash_get(bfd_shop_hash, bs, hash_alloc_intern) == bs); | |
1170 | } | |
1171 | ||
1172 | bool bfd_mhop_insert(struct bfd_session *bs) | |
1173 | { | |
1174 | return (hash_get(bfd_mhop_hash, bs, hash_alloc_intern) == bs); | |
1175 | } | |
1176 | ||
1177 | bool bfd_vrf_insert(struct bfd_vrf *vrf) | |
1178 | { | |
1179 | return (hash_get(bfd_vrf_hash, vrf, hash_alloc_intern) == vrf); | |
1180 | } | |
1181 | ||
1182 | bool bfd_iface_insert(struct bfd_iface *iface) | |
1183 | { | |
1184 | return (hash_get(bfd_iface_hash, iface, hash_alloc_intern) == iface); | |
1185 | } | |
1186 | ||
1187 | void bfd_initialize(void) | |
1188 | { | |
1189 | bfd_id_hash = hash_create(bfd_id_hash_do, bfd_id_hash_cmp, | |
1190 | "BFD discriminator hash"); | |
1191 | bfd_shop_hash = hash_create(bfd_shop_hash_do, bfd_shop_hash_cmp, | |
1192 | "BFD single hop hash"); | |
1193 | bfd_mhop_hash = hash_create(bfd_mhop_hash_do, bfd_mhop_hash_cmp, | |
1194 | "BFD multihop hop hash"); | |
1195 | bfd_vrf_hash = | |
1196 | hash_create(bfd_vrf_hash_do, bfd_vrf_hash_cmp, "BFD VRF hash"); | |
1197 | bfd_iface_hash = hash_create(bfd_iface_hash_do, bfd_iface_hash_cmp, | |
1198 | "BFD interface hash"); | |
1199 | } | |
1200 | ||
1201 | static void _bfd_free(struct hash_backet *hb, | |
1202 | void *arg __attribute__((__unused__))) | |
1203 | { | |
1204 | struct bfd_session *bs = hb->data; | |
1205 | ||
1206 | bfd_session_free(bs); | |
1207 | } | |
1208 | ||
1209 | static void _vrf_free(void *arg) | |
1210 | { | |
1211 | struct bfd_vrf *vrf = arg; | |
1212 | ||
1213 | XFREE(MTYPE_BFDD_CONFIG, vrf); | |
1214 | } | |
1215 | ||
1216 | static void _iface_free(void *arg) | |
1217 | { | |
1218 | struct bfd_iface *iface = arg; | |
1219 | ||
1220 | XFREE(MTYPE_BFDD_CONFIG, iface); | |
1221 | } | |
1222 | ||
1223 | void bfd_shutdown(void) | |
1224 | { | |
1225 | /* | |
1226 | * Close and free all BFD sessions. | |
1227 | * | |
1228 | * _bfd_free() will call bfd_session_free() which will take care | |
1229 | * of removing the session from all hashes, so we just run an | |
1230 | * assert() here to make sure it really happened. | |
1231 | */ | |
1232 | bfd_id_iterate(_bfd_free, NULL); | |
1233 | assert(bfd_shop_hash->count == 0); | |
1234 | assert(bfd_mhop_hash->count == 0); | |
1235 | ||
1236 | /* Clean the VRF and interface hashes. */ | |
1237 | hash_clean(bfd_vrf_hash, _vrf_free); | |
1238 | hash_clean(bfd_iface_hash, _iface_free); | |
1239 | ||
1240 | /* Now free the hashes themselves. */ | |
1241 | hash_free(bfd_id_hash); | |
1242 | hash_free(bfd_shop_hash); | |
1243 | hash_free(bfd_mhop_hash); | |
1244 | hash_free(bfd_vrf_hash); | |
1245 | hash_free(bfd_iface_hash); | |
1246 | } |