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1 | /********************************************************************* |
2 | * Copyright 2017-2018 Network Device Education Foundation, Inc. ("NetDEF") | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms of the GNU General Public License as published by the Free | |
6 | * Software Foundation; either version 2 of the License, or (at your option) | |
7 | * any later version. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License along | |
15 | * with this program; see the file COPYING; if not, write to the Free Software | |
16 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
17 | * | |
18 | * config.c: implements the BFD daemon configuration handling. | |
19 | * | |
20 | * Authors | |
21 | * ------- | |
22 | * Rafael Zalamena <rzalamena@opensourcerouting.org> | |
23 | */ | |
24 | ||
25 | #include <zebra.h> | |
26 | ||
27 | #include <string.h> | |
28 | ||
29 | #include "lib/json.h" | |
30 | ||
31 | #include "bfd.h" | |
32 | ||
33 | /* | |
34 | * Definitions | |
35 | */ | |
36 | enum peer_list_type { | |
37 | PLT_IPV4, | |
38 | PLT_IPV6, | |
39 | PLT_LABEL, | |
40 | }; | |
41 | ||
42 | ||
43 | /* | |
44 | * Prototypes | |
45 | */ | |
46 | static int parse_config_json(struct json_object *jo, bpc_handle h, void *arg); | |
47 | static int parse_list(struct json_object *jo, enum peer_list_type plt, | |
48 | bpc_handle h, void *arg); | |
49 | static int parse_peer_config(struct json_object *jo, struct bfd_peer_cfg *bpc); | |
50 | static int parse_peer_label_config(struct json_object *jo, | |
51 | struct bfd_peer_cfg *bpc); | |
52 | ||
53 | static int config_add(struct bfd_peer_cfg *bpc, void *arg); | |
54 | static int config_del(struct bfd_peer_cfg *bpc, void *arg); | |
55 | ||
56 | static int json_object_add_peer(struct json_object *jo, struct bfd_session *bs); | |
57 | ||
58 | ||
59 | /* | |
60 | * Implementation | |
61 | */ | |
62 | static int config_add(struct bfd_peer_cfg *bpc, | |
63 | void *arg __attribute__((unused))) | |
64 | { | |
65 | return ptm_bfd_sess_new(bpc) == NULL; | |
66 | } | |
67 | ||
68 | static int config_del(struct bfd_peer_cfg *bpc, | |
69 | void *arg __attribute__((unused))) | |
70 | { | |
71 | return ptm_bfd_ses_del(bpc) != 0; | |
72 | } | |
73 | ||
74 | static int parse_config_json(struct json_object *jo, bpc_handle h, void *arg) | |
75 | { | |
76 | const char *key, *sval; | |
77 | struct json_object *jo_val; | |
78 | struct json_object_iterator joi, join; | |
79 | int error = 0; | |
80 | ||
81 | JSON_FOREACH (jo, joi, join) { | |
82 | key = json_object_iter_peek_name(&joi); | |
83 | jo_val = json_object_iter_peek_value(&joi); | |
84 | ||
85 | if (strcmp(key, "ipv4") == 0) { | |
86 | error += parse_list(jo_val, PLT_IPV4, h, arg); | |
87 | } else if (strcmp(key, "ipv6") == 0) { | |
88 | error += parse_list(jo_val, PLT_IPV6, h, arg); | |
89 | } else if (strcmp(key, "label") == 0) { | |
90 | error += parse_list(jo_val, PLT_LABEL, h, arg); | |
91 | } else { | |
92 | sval = json_object_get_string(jo_val); | |
93 | log_warning("%s:%d invalid configuration: %s", __func__, | |
94 | __LINE__, sval); | |
95 | error++; | |
96 | } | |
97 | } | |
98 | ||
99 | /* | |
100 | * Our callers never call free() on json_object and only expect | |
101 | * the return value, so lets free() it here. | |
102 | */ | |
103 | json_object_put(jo); | |
104 | ||
105 | return error; | |
106 | } | |
107 | ||
108 | int parse_config(const char *fname) | |
109 | { | |
110 | struct json_object *jo; | |
111 | ||
112 | jo = json_object_from_file(fname); | |
113 | if (jo == NULL) | |
114 | return -1; | |
115 | ||
116 | return parse_config_json(jo, config_add, NULL); | |
117 | } | |
118 | ||
119 | static int parse_list(struct json_object *jo, enum peer_list_type plt, | |
120 | bpc_handle h, void *arg) | |
121 | { | |
122 | struct json_object *jo_val; | |
123 | struct bfd_peer_cfg bpc; | |
124 | int allen, idx; | |
125 | int error = 0, result; | |
126 | ||
127 | allen = json_object_array_length(jo); | |
128 | for (idx = 0; idx < allen; idx++) { | |
129 | jo_val = json_object_array_get_idx(jo, idx); | |
130 | ||
131 | /* Set defaults. */ | |
132 | memset(&bpc, 0, sizeof(bpc)); | |
133 | bpc.bpc_detectmultiplier = BFD_DEFDETECTMULT; | |
134 | bpc.bpc_recvinterval = BFD_DEFREQUIREDMINRX; | |
135 | bpc.bpc_txinterval = BFD_DEFDESIREDMINTX; | |
136 | bpc.bpc_echointerval = BFD_DEF_REQ_MIN_ECHO; | |
137 | ||
138 | switch (plt) { | |
139 | case PLT_IPV4: | |
140 | log_debug("ipv4 peers %d:", allen); | |
141 | bpc.bpc_ipv4 = true; | |
142 | break; | |
143 | case PLT_IPV6: | |
144 | log_debug("ipv6 peers %d:", allen); | |
145 | bpc.bpc_ipv4 = false; | |
146 | break; | |
147 | case PLT_LABEL: | |
148 | log_debug("label peers %d:", allen); | |
149 | if (parse_peer_label_config(jo_val, &bpc) != 0) { | |
150 | error++; | |
151 | continue; | |
152 | } | |
153 | break; | |
154 | ||
155 | default: | |
156 | error++; | |
157 | log_error("%s:%d: unsupported peer type", __func__, | |
158 | __LINE__); | |
159 | break; | |
160 | } | |
161 | ||
162 | result = parse_peer_config(jo_val, &bpc); | |
163 | error += result; | |
164 | if (result == 0) | |
165 | error += (h(&bpc, arg) != 0); | |
166 | } | |
167 | ||
168 | return error; | |
169 | } | |
170 | ||
171 | static int parse_peer_config(struct json_object *jo, struct bfd_peer_cfg *bpc) | |
172 | { | |
173 | const char *key, *sval; | |
174 | struct json_object *jo_val; | |
175 | struct json_object_iterator joi, join; | |
176 | int family_type = (bpc->bpc_ipv4) ? AF_INET : AF_INET6; | |
177 | int error = 0; | |
178 | ||
179 | log_debug("\tpeer: %s", bpc->bpc_ipv4 ? "ipv4" : "ipv6"); | |
180 | ||
181 | JSON_FOREACH (jo, joi, join) { | |
182 | key = json_object_iter_peek_name(&joi); | |
183 | jo_val = json_object_iter_peek_value(&joi); | |
184 | ||
185 | if (strcmp(key, "multihop") == 0) { | |
186 | bpc->bpc_mhop = json_object_get_boolean(jo_val); | |
187 | log_debug("\tmultihop: %s", | |
188 | bpc->bpc_mhop ? "true" : "false"); | |
189 | } else if (strcmp(key, "peer-address") == 0) { | |
190 | sval = json_object_get_string(jo_val); | |
191 | if (strtosa(sval, &bpc->bpc_peer) != 0 | |
192 | || bpc->bpc_peer.sa_sin.sin_family != family_type) { | |
193 | log_info( | |
194 | "%s:%d failed to parse peer-address '%s'", | |
195 | __func__, __LINE__, sval); | |
196 | error++; | |
197 | } | |
198 | log_debug("\tpeer-address: %s", sval); | |
199 | } else if (strcmp(key, "local-address") == 0) { | |
200 | sval = json_object_get_string(jo_val); | |
201 | if (strtosa(sval, &bpc->bpc_local) != 0 | |
202 | || bpc->bpc_local.sa_sin.sin_family | |
203 | != family_type) { | |
204 | log_info( | |
205 | "%s:%d failed to parse local-address '%s'", | |
206 | __func__, __LINE__, sval); | |
207 | error++; | |
208 | } | |
209 | log_debug("\tlocal-address: %s", sval); | |
210 | } else if (strcmp(key, "local-interface") == 0) { | |
211 | bpc->bpc_has_localif = true; | |
212 | sval = json_object_get_string(jo_val); | |
213 | if (strlcpy(bpc->bpc_localif, sval, | |
214 | sizeof(bpc->bpc_localif)) | |
215 | > sizeof(bpc->bpc_localif)) { | |
216 | log_debug("\tlocal-interface: %s (truncated)"); | |
217 | error++; | |
218 | } else { | |
219 | log_debug("\tlocal-interface: %s", sval); | |
220 | } | |
221 | } else if (strcmp(key, "vxlan") == 0) { | |
222 | bpc->bpc_vxlan = json_object_get_int64(jo_val); | |
223 | bpc->bpc_has_vxlan = true; | |
224 | log_debug("\tvxlan: %ld", bpc->bpc_vxlan); | |
225 | } else if (strcmp(key, "vrf-name") == 0) { | |
226 | bpc->bpc_has_vrfname = true; | |
227 | sval = json_object_get_string(jo_val); | |
228 | if (strlcpy(bpc->bpc_vrfname, sval, | |
229 | sizeof(bpc->bpc_vrfname)) | |
230 | > sizeof(bpc->bpc_vrfname)) { | |
231 | log_debug("\tvrf-name: %s (truncated)", sval); | |
232 | error++; | |
233 | } else { | |
234 | log_debug("\tvrf-name: %s", sval); | |
235 | } | |
236 | } else if (strcmp(key, "detect-multiplier") == 0) { | |
237 | bpc->bpc_detectmultiplier = | |
238 | json_object_get_int64(jo_val); | |
239 | bpc->bpc_has_detectmultiplier = true; | |
240 | log_debug("\tdetect-multiplier: %llu", | |
241 | bpc->bpc_detectmultiplier); | |
242 | } else if (strcmp(key, "receive-interval") == 0) { | |
243 | bpc->bpc_recvinterval = json_object_get_int64(jo_val); | |
244 | bpc->bpc_has_recvinterval = true; | |
245 | log_debug("\treceive-interval: %llu", | |
246 | bpc->bpc_recvinterval); | |
247 | } else if (strcmp(key, "transmit-interval") == 0) { | |
248 | bpc->bpc_txinterval = json_object_get_int64(jo_val); | |
249 | bpc->bpc_has_txinterval = true; | |
250 | log_debug("\ttransmit-interval: %llu", | |
251 | bpc->bpc_txinterval); | |
252 | } else if (strcmp(key, "echo-interval") == 0) { | |
253 | bpc->bpc_echointerval = json_object_get_int64(jo_val); | |
254 | bpc->bpc_has_echointerval = true; | |
255 | log_debug("\techo-interval: %llu", | |
256 | bpc->bpc_echointerval); | |
257 | } else if (strcmp(key, "create-only") == 0) { | |
258 | bpc->bpc_createonly = json_object_get_boolean(jo_val); | |
259 | log_debug("\tcreate-only: %s", | |
260 | bpc->bpc_createonly ? "true" : "false"); | |
261 | } else if (strcmp(key, "shutdown") == 0) { | |
262 | bpc->bpc_shutdown = json_object_get_boolean(jo_val); | |
263 | log_debug("\tshutdown: %s", | |
264 | bpc->bpc_shutdown ? "true" : "false"); | |
265 | } else if (strcmp(key, "echo-mode") == 0) { | |
266 | bpc->bpc_echo = json_object_get_boolean(jo_val); | |
267 | log_debug("\techo-mode: %s", | |
268 | bpc->bpc_echo ? "true" : "false"); | |
269 | } else if (strcmp(key, "label") == 0) { | |
270 | bpc->bpc_has_label = true; | |
271 | sval = json_object_get_string(jo_val); | |
272 | if (strlcpy(bpc->bpc_label, sval, | |
273 | sizeof(bpc->bpc_label)) | |
274 | > sizeof(bpc->bpc_label)) { | |
275 | log_debug("\tlabel: %s (truncated)", sval); | |
276 | error++; | |
277 | } else { | |
278 | log_debug("\tlabel: %s", sval); | |
279 | } | |
280 | } else { | |
281 | sval = json_object_get_string(jo_val); | |
282 | log_warning("%s:%d invalid configuration: '%s: %s'", | |
283 | __func__, __LINE__, key, sval); | |
284 | error++; | |
285 | } | |
286 | } | |
287 | ||
288 | if (bpc->bpc_peer.sa_sin.sin_family == 0) { | |
289 | log_debug("%s:%d no peer address provided", __func__, __LINE__); | |
290 | error++; | |
291 | } | |
292 | ||
293 | return error; | |
294 | } | |
295 | ||
296 | static int parse_peer_label_config(struct json_object *jo, | |
297 | struct bfd_peer_cfg *bpc) | |
298 | { | |
299 | struct peer_label *pl; | |
300 | struct json_object *label; | |
301 | const char *sval; | |
302 | ||
303 | /* Get label and translate it to BFD daemon key. */ | |
304 | if (!json_object_object_get_ex(jo, "label", &label)) | |
305 | return 1; | |
306 | ||
307 | sval = json_object_get_string(label); | |
308 | ||
309 | pl = pl_find(sval); | |
310 | if (pl == NULL) | |
311 | return 1; | |
312 | ||
313 | log_debug("\tpeer-label: %s", sval); | |
314 | ||
315 | /* Translate the label into BFD address keys. */ | |
316 | bpc->bpc_ipv4 = !BFD_CHECK_FLAG(pl->pl_bs->flags, BFD_SESS_FLAG_IPV6); | |
317 | bpc->bpc_mhop = BFD_CHECK_FLAG(pl->pl_bs->flags, BFD_SESS_FLAG_MH); | |
318 | if (bpc->bpc_mhop) { | |
319 | bpc->bpc_peer = pl->pl_bs->mhop.peer; | |
320 | bpc->bpc_local = pl->pl_bs->mhop.local; | |
321 | if (pl->pl_bs->mhop.vrf_name[0]) { | |
322 | bpc->bpc_has_vrfname = true; | |
323 | strlcpy(bpc->bpc_vrfname, pl->pl_bs->mhop.vrf_name, | |
324 | sizeof(bpc->bpc_vrfname)); | |
325 | } | |
326 | } else { | |
327 | bpc->bpc_peer = pl->pl_bs->shop.peer; | |
328 | if (pl->pl_bs->shop.port_name[0]) { | |
329 | bpc->bpc_has_localif = true; | |
330 | strlcpy(bpc->bpc_localif, pl->pl_bs->shop.port_name, | |
331 | sizeof(bpc->bpc_localif)); | |
332 | } | |
333 | } | |
334 | ||
335 | return 0; | |
336 | } | |
337 | ||
338 | ||
339 | /* | |
340 | * Control socket JSON parsing. | |
341 | */ | |
342 | int config_request_add(const char *jsonstr) | |
343 | { | |
344 | struct json_object *jo; | |
345 | ||
346 | jo = json_tokener_parse(jsonstr); | |
347 | if (jo == NULL) | |
348 | return -1; | |
349 | ||
350 | return parse_config_json(jo, config_add, NULL); | |
351 | } | |
352 | ||
353 | int config_request_del(const char *jsonstr) | |
354 | { | |
355 | struct json_object *jo; | |
356 | ||
357 | jo = json_tokener_parse(jsonstr); | |
358 | if (jo == NULL) | |
359 | return -1; | |
360 | ||
361 | return parse_config_json(jo, config_del, NULL); | |
362 | } | |
363 | ||
364 | char *config_response(const char *status, const char *error) | |
365 | { | |
366 | struct json_object *resp, *jo; | |
367 | char *jsonstr; | |
368 | ||
369 | resp = json_object_new_object(); | |
370 | if (resp == NULL) | |
371 | return NULL; | |
372 | ||
373 | /* Add 'status' response key. */ | |
374 | jo = json_object_new_string(status); | |
375 | if (jo == NULL) { | |
376 | json_object_put(resp); | |
377 | return NULL; | |
378 | } | |
379 | ||
380 | json_object_object_add(resp, "status", jo); | |
381 | ||
382 | /* Add 'error' response key. */ | |
383 | if (error != NULL) { | |
384 | jo = json_object_new_string(error); | |
385 | if (jo == NULL) { | |
386 | json_object_put(resp); | |
387 | return NULL; | |
388 | } | |
389 | ||
390 | json_object_object_add(resp, "error", jo); | |
391 | } | |
392 | ||
393 | /* Generate JSON response. */ | |
394 | jsonstr = XSTRDUP( | |
395 | MTYPE_BFDD_NOTIFICATION, | |
396 | json_object_to_json_string_ext(resp, BFDD_JSON_CONV_OPTIONS)); | |
397 | json_object_put(resp); | |
398 | ||
399 | return jsonstr; | |
400 | } | |
401 | ||
402 | char *config_notify(struct bfd_session *bs) | |
403 | { | |
404 | struct json_object *resp; | |
405 | char *jsonstr; | |
406 | time_t now; | |
407 | ||
408 | resp = json_object_new_object(); | |
409 | if (resp == NULL) | |
410 | return NULL; | |
411 | ||
412 | json_object_string_add(resp, "op", BCM_NOTIFY_PEER_STATUS); | |
413 | ||
414 | json_object_add_peer(resp, bs); | |
415 | ||
416 | /* Add status information */ | |
417 | json_object_int_add(resp, "id", bs->discrs.my_discr); | |
418 | json_object_int_add(resp, "remote-id", bs->discrs.my_discr); | |
419 | ||
420 | switch (bs->ses_state) { | |
421 | case PTM_BFD_UP: | |
422 | json_object_string_add(resp, "state", "up"); | |
423 | ||
424 | now = monotime(NULL); | |
425 | json_object_int_add(resp, "uptime", now - bs->uptime.tv_sec); | |
426 | break; | |
427 | case PTM_BFD_ADM_DOWN: | |
428 | json_object_string_add(resp, "state", "adm-down"); | |
429 | break; | |
430 | case PTM_BFD_DOWN: | |
431 | json_object_string_add(resp, "state", "down"); | |
432 | ||
433 | now = monotime(NULL); | |
434 | json_object_int_add(resp, "downtime", | |
435 | now - bs->downtime.tv_sec); | |
436 | break; | |
437 | case PTM_BFD_INIT: | |
438 | json_object_string_add(resp, "state", "init"); | |
439 | break; | |
440 | ||
441 | default: | |
442 | json_object_string_add(resp, "state", "unknown"); | |
443 | break; | |
444 | } | |
445 | ||
446 | json_object_int_add(resp, "diagnostics", bs->local_diag); | |
447 | json_object_int_add(resp, "remote-diagnostics", bs->remote_diag); | |
448 | ||
449 | /* Generate JSON response. */ | |
450 | jsonstr = XSTRDUP( | |
451 | MTYPE_BFDD_NOTIFICATION, | |
452 | json_object_to_json_string_ext(resp, BFDD_JSON_CONV_OPTIONS)); | |
453 | json_object_put(resp); | |
454 | ||
455 | return jsonstr; | |
456 | } | |
457 | ||
458 | char *config_notify_config(const char *op, struct bfd_session *bs) | |
459 | { | |
460 | struct json_object *resp; | |
461 | char *jsonstr; | |
462 | ||
463 | resp = json_object_new_object(); | |
464 | if (resp == NULL) | |
465 | return NULL; | |
466 | ||
467 | json_object_string_add(resp, "op", op); | |
468 | ||
469 | json_object_add_peer(resp, bs); | |
470 | ||
471 | /* On peer deletion we don't need to add any additional information. */ | |
472 | if (strcmp(op, BCM_NOTIFY_CONFIG_DELETE) == 0) | |
473 | goto skip_config; | |
474 | ||
475 | json_object_int_add(resp, "detect-multiplier", bs->detect_mult); | |
476 | json_object_int_add(resp, "receive-interval", | |
477 | bs->timers.required_min_rx / 1000); | |
478 | json_object_int_add(resp, "transmit-interval", bs->up_min_tx / 1000); | |
479 | json_object_int_add(resp, "echo-interval", | |
480 | bs->timers.required_min_echo / 1000); | |
481 | ||
482 | json_object_int_add(resp, "remote-detect-multiplier", | |
483 | bs->remote_detect_mult); | |
484 | json_object_int_add(resp, "remote-receive-interval", | |
485 | bs->remote_timers.required_min_rx / 1000); | |
486 | json_object_int_add(resp, "remote-transmit-interval", | |
487 | bs->remote_timers.desired_min_tx / 1000); | |
488 | json_object_int_add(resp, "remote-echo-interval", | |
489 | bs->remote_timers.required_min_echo / 1000); | |
490 | ||
491 | if (BFD_CHECK_FLAG(bs->flags, BFD_SESS_FLAG_ECHO)) | |
492 | json_object_boolean_true_add(resp, "echo-mode"); | |
493 | else | |
494 | json_object_boolean_false_add(resp, "echo-mode"); | |
495 | ||
496 | if (BFD_CHECK_FLAG(bs->flags, BFD_SESS_FLAG_SHUTDOWN)) | |
497 | json_object_boolean_true_add(resp, "shutdown"); | |
498 | else | |
499 | json_object_boolean_false_add(resp, "shutdown"); | |
500 | ||
501 | skip_config: | |
502 | /* Generate JSON response. */ | |
503 | jsonstr = XSTRDUP( | |
504 | MTYPE_BFDD_NOTIFICATION, | |
505 | json_object_to_json_string_ext(resp, BFDD_JSON_CONV_OPTIONS)); | |
506 | json_object_put(resp); | |
507 | ||
508 | return jsonstr; | |
509 | } | |
510 | ||
511 | int config_notify_request(struct bfd_control_socket *bcs, const char *jsonstr, | |
512 | bpc_handle bh) | |
513 | { | |
514 | struct json_object *jo; | |
515 | ||
516 | jo = json_tokener_parse(jsonstr); | |
517 | if (jo == NULL) | |
518 | return -1; | |
519 | ||
520 | return parse_config_json(jo, bh, bcs); | |
521 | } | |
522 | ||
523 | static int json_object_add_peer(struct json_object *jo, struct bfd_session *bs) | |
524 | { | |
525 | /* Add peer 'key' information. */ | |
526 | if (BFD_CHECK_FLAG(bs->flags, BFD_SESS_FLAG_IPV6)) | |
527 | json_object_boolean_true_add(jo, "ipv6"); | |
528 | else | |
529 | json_object_boolean_false_add(jo, "ipv6"); | |
530 | ||
531 | if (BFD_CHECK_FLAG(bs->flags, BFD_SESS_FLAG_MH)) { | |
532 | json_object_boolean_true_add(jo, "multihop"); | |
533 | json_object_string_add(jo, "peer-address", | |
534 | satostr(&bs->mhop.peer)); | |
535 | json_object_string_add(jo, "local-address", | |
536 | satostr(&bs->mhop.local)); | |
537 | if (strlen(bs->mhop.vrf_name) > 0) | |
538 | json_object_string_add(jo, "vrf-name", | |
539 | bs->mhop.vrf_name); | |
540 | } else { | |
541 | json_object_boolean_false_add(jo, "multihop"); | |
542 | json_object_string_add(jo, "peer-address", | |
543 | satostr(&bs->shop.peer)); | |
544 | if (bs->local_address.sa_sin.sin_family != AF_UNSPEC) | |
545 | json_object_string_add(jo, "local-address", | |
546 | satostr(&bs->local_address)); | |
547 | if (strlen(bs->shop.port_name) > 0) | |
548 | json_object_string_add(jo, "local-interface", | |
549 | bs->shop.port_name); | |
550 | } | |
551 | ||
552 | if (bs->pl) | |
553 | json_object_string_add(jo, "label", bs->pl->pl_label); | |
554 | ||
555 | return 0; | |
556 | } | |
557 | ||
558 | ||
559 | /* | |
560 | * Label handling | |
561 | */ | |
562 | struct peer_label *pl_find(const char *label) | |
563 | { | |
564 | struct peer_label *pl; | |
565 | ||
566 | TAILQ_FOREACH (pl, &bglobal.bg_pllist, pl_entry) { | |
567 | if (strcmp(pl->pl_label, label) != 0) | |
568 | continue; | |
569 | ||
570 | return pl; | |
571 | } | |
572 | ||
573 | return NULL; | |
574 | } | |
575 | ||
576 | struct peer_label *pl_new(const char *label, struct bfd_session *bs) | |
577 | { | |
578 | struct peer_label *pl; | |
579 | ||
580 | pl = XCALLOC(MTYPE_BFDD_LABEL, sizeof(*pl)); | |
581 | if (pl == NULL) | |
582 | return NULL; | |
583 | ||
584 | if (strlcpy(pl->pl_label, label, sizeof(pl->pl_label)) | |
585 | > sizeof(pl->pl_label)) | |
586 | log_warning("%s:%d: label was truncated", __func__, __LINE__); | |
587 | ||
588 | pl->pl_bs = bs; | |
589 | bs->pl = pl; | |
590 | ||
591 | TAILQ_INSERT_HEAD(&bglobal.bg_pllist, pl, pl_entry); | |
592 | ||
593 | return pl; | |
594 | } | |
595 | ||
596 | void pl_free(struct peer_label *pl) | |
597 | { | |
598 | if (pl == NULL) | |
599 | return; | |
600 | ||
601 | /* Remove the pointer back. */ | |
602 | pl->pl_bs->pl = NULL; | |
603 | ||
604 | TAILQ_REMOVE(&bglobal.bg_pllist, pl, pl_entry); | |
605 | XFREE(MTYPE_BFDD_LABEL, pl); | |
606 | } |