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5bce33b3 RW |
1 | /* |
2 | * Copyright (C) 2018 NetDEF, Inc. | |
3 | * Renato Westphal | |
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 | ||
20 | #include <zebra.h> | |
21 | ||
22 | #include "log.h" | |
23 | #include "lib_errors.h" | |
24 | #include "command.h" | |
25 | #include "libfrr.h" | |
26 | #include "version.h" | |
27 | #include "northbound.h" | |
28 | ||
29 | #include <confd_lib.h> | |
30 | #include <confd_cdb.h> | |
31 | #include <confd_dp.h> | |
32 | #include <confd_maapi.h> | |
33 | ||
34 | DEFINE_MTYPE_STATIC(LIB, CONFD, "ConfD module") | |
35 | ||
36 | static struct thread_master *master; | |
37 | static struct sockaddr confd_addr; | |
38 | static int cdb_sub_sock, dp_ctl_sock, dp_worker_sock; | |
39 | static struct thread *t_cdb_sub, *t_dp_ctl, *t_dp_worker; | |
40 | static struct confd_daemon_ctx *dctx; | |
41 | static struct confd_notification_ctx *live_ctx; | |
42 | static bool confd_connected; | |
43 | static struct list *confd_spoints; | |
88a7d121 | 44 | static struct nb_transaction *transaction; |
5bce33b3 RW |
45 | |
46 | static void frr_confd_finish_cdb(void); | |
47 | static void frr_confd_finish_dp(void); | |
48 | static int frr_confd_finish(void); | |
49 | ||
50 | #define flog_err_confd(funcname) \ | |
51 | flog_err(EC_LIB_LIBCONFD, "%s: %s() failed: %s (%d): %s", __func__, \ | |
52 | (funcname), confd_strerror(confd_errno), confd_errno, \ | |
53 | confd_lasterr()) | |
54 | ||
55 | ||
56 | /* ------------ Utils ------------ */ | |
57 | ||
58 | /* Get XPath string from ConfD hashed keypath. */ | |
59 | static void frr_confd_get_xpath(const confd_hkeypath_t *kp, char *xpath, | |
60 | size_t len) | |
61 | { | |
62 | char *p; | |
63 | ||
64 | confd_xpath_pp_kpath(xpath, len, 0, kp); | |
65 | ||
66 | /* | |
67 | * Replace double quotes by single quotes (the format accepted by the | |
68 | * northbound API). | |
69 | */ | |
70 | p = xpath; | |
71 | while ((p = strchr(p, '"')) != NULL) | |
72 | *p++ = '\''; | |
73 | } | |
74 | ||
75 | /* Convert ConfD binary value to a string. */ | |
76 | static int frr_confd_val2str(const char *xpath, const confd_value_t *value, | |
77 | char *string, size_t string_size) | |
78 | { | |
79 | struct confd_cs_node *csp; | |
80 | ||
81 | csp = confd_cs_node_cd(NULL, xpath); | |
82 | if (!csp) { | |
83 | flog_err_confd("confd_cs_node_cd"); | |
84 | return -1; | |
85 | } | |
86 | if (confd_val2str(csp->info.type, value, string, string_size) | |
87 | == CONFD_ERR) { | |
88 | flog_err_confd("confd_val2str"); | |
89 | return -1; | |
90 | } | |
91 | ||
92 | return 0; | |
93 | } | |
94 | ||
1a4bc045 RW |
95 | /* Obtain list entry from ConfD hashed keypath. */ |
96 | static int frr_confd_hkeypath_get_list_entry(const confd_hkeypath_t *kp, | |
97 | struct nb_node *nb_node, | |
98 | const void **list_entry) | |
5bce33b3 | 99 | { |
1a4bc045 RW |
100 | struct nb_node *nb_node_list; |
101 | int parent_lists = 0; | |
102 | int curr_list = 0; | |
103 | ||
104 | *list_entry = NULL; | |
105 | ||
106 | /* | |
107 | * Count the number of YANG lists in the path, disconsidering the | |
108 | * last element. | |
109 | */ | |
110 | nb_node_list = nb_node; | |
111 | while (nb_node_list->parent_list) { | |
112 | nb_node_list = nb_node_list->parent_list; | |
113 | parent_lists++; | |
114 | } | |
115 | if (nb_node->snode->nodetype != LYS_LIST && parent_lists == 0) | |
116 | return 0; | |
117 | ||
118 | /* Start from the beginning and move down the tree. */ | |
119 | for (int i = kp->len; i >= 0; i--) { | |
120 | struct yang_list_keys keys; | |
121 | ||
122 | /* Not a YANG list. */ | |
5bce33b3 RW |
123 | if (kp->v[i][0].type != C_BUF) |
124 | continue; | |
125 | ||
1a4bc045 RW |
126 | /* Obtain list keys. */ |
127 | memset(&keys, 0, sizeof(keys)); | |
5bce33b3 | 128 | for (int j = 0; kp->v[i][j].type != C_NOEXISTS; j++) { |
1a4bc045 | 129 | strlcpy(keys.key[keys.num], |
5bce33b3 | 130 | (char *)kp->v[i][j].val.buf.ptr, |
1a4bc045 RW |
131 | sizeof(keys.key[keys.num])); |
132 | keys.num++; | |
5bce33b3 | 133 | } |
1a4bc045 RW |
134 | |
135 | /* Obtain northbound node associated to the YANG list. */ | |
136 | nb_node_list = nb_node; | |
137 | for (int j = curr_list; j < parent_lists; j++) | |
138 | nb_node_list = nb_node_list->parent_list; | |
139 | ||
140 | /* Obtain list entry. */ | |
141 | *list_entry = | |
142 | nb_node_list->cbs.lookup_entry(*list_entry, &keys); | |
143 | if (*list_entry == NULL) | |
144 | return -1; | |
145 | ||
146 | curr_list++; | |
5bce33b3 | 147 | } |
1a4bc045 RW |
148 | |
149 | return 0; | |
5bce33b3 RW |
150 | } |
151 | ||
152 | /* Fill the current date and time into a confd_datetime structure. */ | |
153 | static void getdatetime(struct confd_datetime *datetime) | |
154 | { | |
155 | struct tm tm; | |
156 | struct timeval tv; | |
157 | ||
158 | gettimeofday(&tv, NULL); | |
159 | gmtime_r(&tv.tv_sec, &tm); | |
160 | ||
161 | memset(datetime, 0, sizeof(*datetime)); | |
162 | datetime->year = 1900 + tm.tm_year; | |
163 | datetime->month = tm.tm_mon + 1; | |
164 | datetime->day = tm.tm_mday; | |
165 | datetime->sec = tm.tm_sec; | |
166 | datetime->micro = tv.tv_usec; | |
167 | datetime->timezone = 0; | |
168 | datetime->timezone_minutes = 0; | |
169 | datetime->hour = tm.tm_hour; | |
170 | datetime->min = tm.tm_min; | |
171 | } | |
172 | ||
173 | /* ------------ CDB code ------------ */ | |
174 | ||
175 | struct cdb_iter_args { | |
176 | struct nb_config *candidate; | |
177 | bool error; | |
178 | }; | |
179 | ||
180 | static enum cdb_iter_ret | |
181 | frr_confd_cdb_diff_iter(confd_hkeypath_t *kp, enum cdb_iter_op cdb_op, | |
182 | confd_value_t *oldv, confd_value_t *newv, void *args) | |
183 | { | |
184 | char xpath[XPATH_MAXLEN]; | |
185 | struct nb_node *nb_node; | |
186 | enum nb_operation nb_op; | |
187 | struct cdb_iter_args *iter_args = args; | |
188 | char value_str[YANG_VALUE_MAXLEN]; | |
189 | struct yang_data *data; | |
190 | char *sb1, *sb2; | |
191 | int ret; | |
192 | ||
193 | frr_confd_get_xpath(kp, xpath, sizeof(xpath)); | |
194 | ||
195 | /* | |
196 | * HACK: obtain value of leaf-list elements from the XPath due to | |
197 | * a bug in the ConfD API. | |
198 | */ | |
199 | value_str[0] = '\0'; | |
200 | sb1 = strrchr(xpath, '['); | |
201 | sb2 = strrchr(xpath, ']'); | |
202 | if (sb1 && sb2 && !strchr(sb1, '=')) { | |
203 | *sb2 = '\0'; | |
204 | strlcpy(value_str, sb1 + 1, sizeof(value_str)); | |
205 | *sb1 = '\0'; | |
206 | } | |
207 | ||
208 | nb_node = nb_node_find(xpath); | |
209 | if (!nb_node) { | |
210 | flog_warn(EC_LIB_YANG_UNKNOWN_DATA_PATH, | |
211 | "%s: unknown data path: %s", __func__, xpath); | |
212 | iter_args->error = true; | |
213 | return ITER_STOP; | |
214 | } | |
215 | ||
216 | /* Map operation values. */ | |
217 | switch (cdb_op) { | |
218 | case MOP_CREATED: | |
219 | nb_op = NB_OP_CREATE; | |
220 | break; | |
221 | case MOP_DELETED: | |
222 | nb_op = NB_OP_DELETE; | |
223 | break; | |
224 | case MOP_VALUE_SET: | |
225 | if (nb_operation_is_valid(NB_OP_MODIFY, nb_node->snode)) | |
226 | nb_op = NB_OP_MODIFY; | |
227 | else | |
228 | /* Ignore list keys modifications. */ | |
229 | return ITER_RECURSE; | |
230 | break; | |
231 | case MOP_MOVED_AFTER: | |
232 | nb_op = NB_OP_MOVE; | |
233 | break; | |
234 | case MOP_MODIFIED: | |
235 | /* We're not interested on this. */ | |
236 | return ITER_RECURSE; | |
237 | default: | |
238 | flog_err(EC_LIB_DEVELOPMENT, | |
239 | "%s: unexpected operation %u [xpath %s]", __func__, | |
240 | cdb_op, xpath); | |
241 | iter_args->error = true; | |
242 | return ITER_STOP; | |
243 | } | |
244 | ||
245 | /* Convert ConfD value to a string. */ | |
246 | if (nb_node->snode->nodetype != LYS_LEAFLIST && newv | |
247 | && frr_confd_val2str(nb_node->xpath, newv, value_str, | |
248 | sizeof(value_str)) | |
249 | != 0) { | |
250 | flog_err(EC_LIB_CONFD_DATA_CONVERT, | |
251 | "%s: failed to convert ConfD value to a string", | |
252 | __func__); | |
253 | iter_args->error = true; | |
254 | return ITER_STOP; | |
255 | } | |
256 | ||
257 | /* Edit the candidate configuration. */ | |
258 | data = yang_data_new(xpath, value_str); | |
259 | ret = nb_candidate_edit(iter_args->candidate, nb_node, nb_op, xpath, | |
260 | NULL, data); | |
261 | yang_data_free(data); | |
262 | if (ret != NB_OK) { | |
263 | flog_warn( | |
264 | EC_LIB_NB_CANDIDATE_EDIT_ERROR, | |
265 | "%s: failed to edit candidate configuration: operation [%s] xpath [%s]", | |
266 | __func__, nb_operation_name(nb_op), xpath); | |
267 | iter_args->error = true; | |
268 | return ITER_STOP; | |
269 | } | |
270 | ||
271 | return ITER_RECURSE; | |
272 | } | |
273 | ||
88a7d121 | 274 | static int frr_confd_cdb_read_cb_prepare(int fd, int *subp, int reslen) |
5bce33b3 | 275 | { |
5bce33b3 RW |
276 | struct nb_config *candidate; |
277 | struct cdb_iter_args iter_args; | |
278 | int ret; | |
279 | ||
5bce33b3 RW |
280 | candidate = nb_config_dup(running_config); |
281 | ||
282 | /* Iterate over all configuration changes. */ | |
283 | iter_args.candidate = candidate; | |
284 | iter_args.error = false; | |
285 | for (int i = 0; i < reslen; i++) { | |
286 | if (cdb_diff_iterate(fd, subp[i], frr_confd_cdb_diff_iter, | |
287 | ITER_WANT_PREV, &iter_args) | |
288 | != CONFD_OK) { | |
289 | flog_err_confd("cdb_diff_iterate"); | |
290 | } | |
291 | } | |
292 | free(subp); | |
293 | ||
294 | if (iter_args.error) { | |
295 | nb_config_free(candidate); | |
296 | ||
297 | if (cdb_sub_abort_trans( | |
298 | cdb_sub_sock, CONFD_ERRCODE_APPLICATION_INTERNAL, 0, | |
299 | 0, "Couldn't apply configuration changes") | |
300 | != CONFD_OK) { | |
301 | flog_err_confd("cdb_sub_abort_trans"); | |
302 | return -1; | |
303 | } | |
304 | return 0; | |
305 | } | |
306 | ||
88a7d121 RW |
307 | /* |
308 | * Validate the configuration changes and allocate all resources | |
309 | * required to apply them. | |
310 | */ | |
311 | transaction = NULL; | |
312 | ret = nb_candidate_commit_prepare(candidate, NB_CLIENT_CONFD, NULL, | |
313 | &transaction); | |
5bce33b3 RW |
314 | if (ret != NB_OK && ret != NB_ERR_NO_CHANGES) { |
315 | enum confd_errcode errcode; | |
316 | const char *errmsg; | |
317 | ||
318 | switch (ret) { | |
319 | case NB_ERR_LOCKED: | |
320 | errcode = CONFD_ERRCODE_IN_USE; | |
321 | errmsg = "Configuration is locked by another process"; | |
322 | break; | |
323 | case NB_ERR_RESOURCE: | |
324 | errcode = CONFD_ERRCODE_RESOURCE_DENIED; | |
325 | errmsg = "Failed do allocate resources"; | |
326 | break; | |
327 | default: | |
328 | errcode = CONFD_ERRCODE_INTERNAL; | |
329 | errmsg = "Internal error"; | |
330 | break; | |
331 | } | |
332 | ||
88a7d121 | 333 | /* Reject the configuration changes. */ |
5bce33b3 RW |
334 | if (cdb_sub_abort_trans(cdb_sub_sock, errcode, 0, 0, "%s", |
335 | errmsg) | |
336 | != CONFD_OK) { | |
337 | flog_err_confd("cdb_sub_abort_trans"); | |
338 | return -1; | |
339 | } | |
340 | } else { | |
88a7d121 | 341 | /* Acknowledge the notification. */ |
5bce33b3 RW |
342 | if (cdb_sync_subscription_socket(fd, CDB_DONE_PRIORITY) |
343 | != CONFD_OK) { | |
344 | flog_err_confd("cdb_sync_subscription_socket"); | |
345 | return -1; | |
346 | } | |
88a7d121 RW |
347 | |
348 | /* No configuration changes. */ | |
349 | if (!transaction) | |
350 | nb_config_free(candidate); | |
351 | } | |
352 | ||
353 | return 0; | |
354 | } | |
355 | ||
356 | static int frr_confd_cdb_read_cb_commit(int fd, int *subp, int reslen) | |
357 | { | |
358 | /* | |
359 | * No need to process the configuration changes again as we're already | |
360 | * keeping track of them in the "transaction" variable. | |
361 | */ | |
362 | free(subp); | |
363 | ||
364 | /* Apply the transaction. */ | |
365 | if (transaction) { | |
366 | struct nb_config *candidate = transaction->config; | |
367 | ||
368 | nb_candidate_commit_apply(transaction, true, NULL); | |
369 | nb_config_free(candidate); | |
370 | } | |
371 | ||
372 | /* Acknowledge the notification. */ | |
373 | if (cdb_sync_subscription_socket(fd, CDB_DONE_PRIORITY) != CONFD_OK) { | |
374 | flog_err_confd("cdb_sync_subscription_socket"); | |
375 | return -1; | |
376 | } | |
377 | ||
378 | return 0; | |
379 | } | |
380 | ||
381 | static int frr_confd_cdb_read_cb_abort(int fd, int *subp, int reslen) | |
382 | { | |
383 | /* | |
384 | * No need to process the configuration changes again as we're already | |
385 | * keeping track of them in the "transaction" variable. | |
386 | */ | |
387 | free(subp); | |
388 | ||
389 | /* Abort the transaction. */ | |
390 | if (transaction) { | |
391 | struct nb_config *candidate = transaction->config; | |
392 | ||
393 | nb_candidate_commit_abort(transaction); | |
394 | nb_config_free(candidate); | |
395 | } | |
396 | ||
397 | /* Acknowledge the notification. */ | |
398 | if (cdb_sync_subscription_socket(fd, CDB_DONE_PRIORITY) != CONFD_OK) { | |
399 | flog_err_confd("cdb_sync_subscription_socket"); | |
400 | return -1; | |
5bce33b3 RW |
401 | } |
402 | ||
403 | return 0; | |
404 | } | |
405 | ||
88a7d121 RW |
406 | static int frr_confd_cdb_read_cb(struct thread *thread) |
407 | { | |
408 | int fd = THREAD_FD(thread); | |
409 | enum cdb_sub_notification cdb_ev; | |
410 | int flags; | |
411 | int *subp = NULL; | |
412 | int reslen = 0; | |
413 | ||
414 | thread = NULL; | |
415 | thread_add_read(master, frr_confd_cdb_read_cb, NULL, fd, &thread); | |
416 | ||
417 | if (cdb_read_subscription_socket2(fd, &cdb_ev, &flags, &subp, &reslen) | |
418 | != CONFD_OK) { | |
419 | flog_err_confd("cdb_read_subscription_socket2"); | |
420 | return -1; | |
421 | } | |
422 | ||
423 | switch (cdb_ev) { | |
424 | case CDB_SUB_PREPARE: | |
425 | return frr_confd_cdb_read_cb_prepare(fd, subp, reslen); | |
426 | case CDB_SUB_COMMIT: | |
427 | return frr_confd_cdb_read_cb_commit(fd, subp, reslen); | |
428 | case CDB_SUB_ABORT: | |
429 | return frr_confd_cdb_read_cb_abort(fd, subp, reslen); | |
430 | default: | |
431 | flog_err_confd("unknown CDB event"); | |
432 | return -1; | |
433 | } | |
434 | } | |
435 | ||
5bce33b3 RW |
436 | /* Trigger CDB subscriptions to read the startup configuration. */ |
437 | static void *thread_cdb_trigger_subscriptions(void *data) | |
438 | { | |
439 | int sock; | |
440 | int *sub_points = NULL, len = 0; | |
441 | struct listnode *node; | |
442 | int *spoint; | |
443 | int i = 0; | |
444 | ||
445 | /* Create CDB data socket. */ | |
446 | sock = socket(PF_INET, SOCK_STREAM, 0); | |
447 | if (sock < 0) { | |
448 | flog_err(EC_LIB_SOCKET, "%s: failed to create socket: %s", | |
449 | __func__, safe_strerror(errno)); | |
450 | return NULL; | |
451 | } | |
452 | ||
453 | if (cdb_connect(sock, CDB_DATA_SOCKET, &confd_addr, | |
454 | sizeof(struct sockaddr_in)) | |
455 | != CONFD_OK) { | |
456 | flog_err_confd("cdb_connect"); | |
457 | return NULL; | |
458 | } | |
459 | ||
460 | /* | |
461 | * Fill array containing the subscription point of all loaded YANG | |
462 | * modules. | |
463 | */ | |
464 | len = listcount(confd_spoints); | |
465 | sub_points = XCALLOC(MTYPE_CONFD, len * sizeof(int)); | |
466 | for (ALL_LIST_ELEMENTS_RO(confd_spoints, node, spoint)) | |
467 | sub_points[i++] = *spoint; | |
468 | ||
469 | if (cdb_trigger_subscriptions(sock, sub_points, len) != CONFD_OK) { | |
470 | flog_err_confd("cdb_trigger_subscriptions"); | |
471 | return NULL; | |
472 | } | |
473 | ||
474 | /* Cleanup and exit thread. */ | |
475 | XFREE(MTYPE_CONFD, sub_points); | |
476 | cdb_close(sock); | |
477 | ||
478 | return NULL; | |
479 | } | |
480 | ||
481 | static int frr_confd_init_cdb(void) | |
482 | { | |
483 | struct yang_module *module; | |
484 | pthread_t cdb_trigger_thread; | |
485 | ||
486 | /* Create CDB subscription socket. */ | |
487 | cdb_sub_sock = socket(PF_INET, SOCK_STREAM, 0); | |
488 | if (cdb_sub_sock < 0) { | |
489 | flog_err(EC_LIB_SOCKET, "%s: failed to create socket: %s", | |
490 | __func__, safe_strerror(errno)); | |
491 | return -1; | |
492 | } | |
493 | ||
494 | if (cdb_connect(cdb_sub_sock, CDB_SUBSCRIPTION_SOCKET, &confd_addr, | |
495 | sizeof(struct sockaddr_in)) | |
496 | != CONFD_OK) { | |
497 | flog_err_confd("cdb_connect"); | |
498 | goto error; | |
499 | } | |
500 | ||
501 | /* Subscribe to all loaded YANG data modules. */ | |
502 | confd_spoints = list_new(); | |
503 | RB_FOREACH (module, yang_modules, &yang_modules) { | |
504 | struct lys_node *snode; | |
505 | ||
506 | module->confd_hash = confd_str2hash(module->info->ns); | |
507 | if (module->confd_hash == 0) { | |
508 | flog_err( | |
509 | EC_LIB_LIBCONFD, | |
510 | "%s: failed to find hash value for namespace %s", | |
511 | __func__, module->info->ns); | |
512 | goto error; | |
513 | } | |
514 | ||
515 | /* | |
516 | * The CDB API doesn't provide a mechanism to subscribe to an | |
517 | * entire YANG module. So we have to find the top level | |
518 | * nodes ourselves and subscribe to their paths. | |
519 | */ | |
520 | LY_TREE_FOR (module->info->data, snode) { | |
521 | struct nb_node *nb_node; | |
522 | int *spoint; | |
523 | int ret; | |
524 | ||
525 | switch (snode->nodetype) { | |
526 | case LYS_CONTAINER: | |
527 | case LYS_LEAF: | |
528 | case LYS_LEAFLIST: | |
529 | case LYS_LIST: | |
530 | break; | |
531 | default: | |
532 | continue; | |
533 | } | |
534 | ||
85cd3326 RW |
535 | if (CHECK_FLAG(snode->flags, LYS_CONFIG_R)) |
536 | continue; | |
537 | ||
5bce33b3 RW |
538 | nb_node = snode->priv; |
539 | if (debug_northbound) | |
540 | zlog_debug("%s: subscribing to '%s'", __func__, | |
541 | nb_node->xpath); | |
542 | ||
543 | spoint = XMALLOC(MTYPE_CONFD, sizeof(*spoint)); | |
544 | ret = cdb_subscribe2( | |
545 | cdb_sub_sock, CDB_SUB_RUNNING_TWOPHASE, | |
546 | CDB_SUB_WANT_ABORT_ON_ABORT, 3, spoint, | |
547 | module->confd_hash, nb_node->xpath); | |
548 | if (ret != CONFD_OK) { | |
549 | flog_err_confd("cdb_subscribe2"); | |
550 | XFREE(MTYPE_CONFD, spoint); | |
551 | } | |
552 | listnode_add(confd_spoints, spoint); | |
553 | } | |
554 | } | |
555 | ||
556 | if (cdb_subscribe_done(cdb_sub_sock) != CONFD_OK) { | |
557 | flog_err_confd("cdb_subscribe_done"); | |
558 | goto error; | |
559 | } | |
560 | ||
561 | /* Create short lived pthread to trigger the CDB subscriptions. */ | |
562 | if (pthread_create(&cdb_trigger_thread, NULL, | |
563 | thread_cdb_trigger_subscriptions, NULL)) { | |
564 | flog_err(EC_LIB_SYSTEM_CALL, "%s: error creating pthread: %s", | |
565 | __func__, safe_strerror(errno)); | |
566 | goto error; | |
567 | } | |
568 | pthread_detach(cdb_trigger_thread); | |
569 | ||
570 | thread_add_read(master, frr_confd_cdb_read_cb, NULL, cdb_sub_sock, | |
571 | &t_cdb_sub); | |
572 | ||
573 | return 0; | |
574 | ||
575 | error: | |
576 | frr_confd_finish_cdb(); | |
577 | ||
578 | return -1; | |
579 | } | |
580 | ||
581 | static void frr_confd_finish_cdb(void) | |
582 | { | |
583 | if (cdb_sub_sock > 0) { | |
584 | THREAD_OFF(t_cdb_sub); | |
585 | cdb_close(cdb_sub_sock); | |
586 | } | |
587 | } | |
588 | ||
589 | /* ------------ DP code ------------ */ | |
590 | ||
591 | static int frr_confd_transaction_init(struct confd_trans_ctx *tctx) | |
592 | { | |
593 | confd_trans_set_fd(tctx, dp_worker_sock); | |
594 | ||
595 | return CONFD_OK; | |
596 | } | |
597 | ||
1a4bc045 RW |
598 | #define CONFD_MAX_CHILD_NODES 32 |
599 | ||
5bce33b3 RW |
600 | static int frr_confd_data_get_elem(struct confd_trans_ctx *tctx, |
601 | confd_hkeypath_t *kp) | |
602 | { | |
1a4bc045 | 603 | struct nb_node *nb_node; |
5bce33b3 | 604 | char xpath[BUFSIZ]; |
5bce33b3 RW |
605 | struct yang_data *data; |
606 | confd_value_t v; | |
607 | const void *list_entry = NULL; | |
608 | ||
609 | frr_confd_get_xpath(kp, xpath, sizeof(xpath)); | |
610 | ||
611 | nb_node = nb_node_find(xpath); | |
612 | if (!nb_node) { | |
613 | flog_warn(EC_LIB_YANG_UNKNOWN_DATA_PATH, | |
614 | "%s: unknown data path: %s", __func__, xpath); | |
615 | confd_data_reply_not_found(tctx); | |
616 | return CONFD_OK; | |
617 | } | |
618 | ||
1a4bc045 RW |
619 | if (frr_confd_hkeypath_get_list_entry(kp, nb_node, &list_entry) != 0) { |
620 | confd_data_reply_not_found(tctx); | |
621 | return CONFD_OK; | |
5bce33b3 RW |
622 | } |
623 | ||
624 | data = nb_node->cbs.get_elem(xpath, list_entry); | |
625 | if (data) { | |
626 | if (data->value) { | |
627 | CONFD_SET_STR(&v, data->value); | |
628 | confd_data_reply_value(tctx, &v); | |
629 | } else | |
630 | confd_data_reply_found(tctx); | |
631 | yang_data_free(data); | |
632 | } else | |
633 | confd_data_reply_not_found(tctx); | |
634 | ||
635 | return CONFD_OK; | |
636 | } | |
637 | ||
638 | static int frr_confd_data_get_next(struct confd_trans_ctx *tctx, | |
639 | confd_hkeypath_t *kp, long next) | |
640 | { | |
641 | struct nb_node *nb_node; | |
642 | char xpath[BUFSIZ]; | |
643 | struct yang_list_keys keys; | |
1a4bc045 RW |
644 | struct yang_data *data; |
645 | const void *parent_list_entry, *nb_next; | |
5bce33b3 RW |
646 | confd_value_t v[LIST_MAXKEYS]; |
647 | ||
648 | frr_confd_get_xpath(kp, xpath, sizeof(xpath)); | |
649 | ||
650 | nb_node = nb_node_find(xpath); | |
651 | if (!nb_node) { | |
652 | flog_warn(EC_LIB_YANG_UNKNOWN_DATA_PATH, | |
653 | "%s: unknown data path: %s", __func__, xpath); | |
654 | confd_data_reply_next_key(tctx, NULL, -1, -1); | |
655 | return CONFD_OK; | |
656 | } | |
657 | ||
1a4bc045 RW |
658 | if (frr_confd_hkeypath_get_list_entry(kp, nb_node, &parent_list_entry) |
659 | != 0) { | |
660 | /* List entry doesn't exist anymore. */ | |
5bce33b3 RW |
661 | confd_data_reply_next_key(tctx, NULL, -1, -1); |
662 | return CONFD_OK; | |
663 | } | |
1a4bc045 RW |
664 | |
665 | nb_next = nb_node->cbs.get_next(parent_list_entry, | |
666 | (next == -1) ? NULL : (void *)next); | |
667 | if (!nb_next) { | |
668 | /* End of the list or leaf-list. */ | |
5bce33b3 RW |
669 | confd_data_reply_next_key(tctx, NULL, -1, -1); |
670 | return CONFD_OK; | |
671 | } | |
672 | ||
1a4bc045 RW |
673 | switch (nb_node->snode->nodetype) { |
674 | case LYS_LIST: | |
675 | memset(&keys, 0, sizeof(keys)); | |
676 | if (nb_node->cbs.get_keys(nb_next, &keys) != NB_OK) { | |
677 | flog_warn(EC_LIB_NB_CB_STATE, | |
678 | "%s: failed to get list keys", __func__); | |
679 | confd_data_reply_next_key(tctx, NULL, -1, -1); | |
680 | return CONFD_OK; | |
681 | } | |
682 | ||
683 | /* Feed keys to ConfD. */ | |
684 | for (size_t i = 0; i < keys.num; i++) | |
685 | CONFD_SET_STR(&v[i], keys.key[i]); | |
686 | confd_data_reply_next_key(tctx, v, keys.num, (long)nb_next); | |
687 | break; | |
688 | case LYS_LEAFLIST: | |
689 | data = nb_node->cbs.get_elem(xpath, nb_next); | |
690 | if (data) { | |
691 | if (data->value) { | |
692 | CONFD_SET_STR(&v[0], data->value); | |
693 | confd_data_reply_next_key(tctx, v, 1, | |
694 | (long)nb_next); | |
695 | } | |
696 | yang_data_free(data); | |
697 | } else | |
698 | confd_data_reply_next_key(tctx, NULL, -1, -1); | |
699 | break; | |
700 | default: | |
701 | break; | |
702 | } | |
5bce33b3 RW |
703 | |
704 | return CONFD_OK; | |
705 | } | |
706 | ||
707 | /* | |
708 | * Optional callback - implemented for performance reasons. | |
709 | */ | |
710 | static int frr_confd_data_get_object(struct confd_trans_ctx *tctx, | |
711 | confd_hkeypath_t *kp) | |
712 | { | |
713 | struct nb_node *nb_node; | |
1a4bc045 | 714 | const struct lys_node *child; |
5bce33b3 | 715 | char xpath[BUFSIZ]; |
5bce33b3 | 716 | char xpath_child[XPATH_MAXLEN]; |
5bce33b3 RW |
717 | struct list *elements; |
718 | struct yang_data *data; | |
719 | const void *list_entry; | |
1a4bc045 RW |
720 | confd_value_t values[CONFD_MAX_CHILD_NODES]; |
721 | size_t nvalues = 0; | |
5bce33b3 RW |
722 | |
723 | frr_confd_get_xpath(kp, xpath, sizeof(xpath)); | |
724 | ||
725 | nb_node = nb_node_find(xpath); | |
726 | if (!nb_node) { | |
727 | flog_warn(EC_LIB_YANG_UNKNOWN_DATA_PATH, | |
728 | "%s: unknown data path: %s", __func__, xpath); | |
729 | confd_data_reply_not_found(tctx); | |
1a4bc045 | 730 | return CONFD_ERR; |
5bce33b3 RW |
731 | } |
732 | ||
1a4bc045 | 733 | if (frr_confd_hkeypath_get_list_entry(kp, nb_node, &list_entry) != 0) { |
5bce33b3 RW |
734 | confd_data_reply_not_found(tctx); |
735 | return CONFD_OK; | |
736 | } | |
737 | ||
5bce33b3 | 738 | elements = yang_data_list_new(); |
5bce33b3 RW |
739 | |
740 | /* Loop through list child nodes. */ | |
1a4bc045 RW |
741 | LY_TREE_FOR (nb_node->snode->child, child) { |
742 | struct nb_node *nb_node_child = child->priv; | |
743 | confd_value_t *v; | |
744 | ||
745 | if (nvalues > CONFD_MAX_CHILD_NODES) | |
746 | break; | |
747 | ||
748 | v = &values[nvalues++]; | |
5bce33b3 | 749 | |
1a4bc045 RW |
750 | /* Non-presence containers, lists and leaf-lists. */ |
751 | if (!nb_node_child->cbs.get_elem) { | |
752 | CONFD_SET_NOEXISTS(v); | |
753 | continue; | |
754 | } | |
5bce33b3 RW |
755 | |
756 | snprintf(xpath_child, sizeof(xpath_child), "%s/%s", xpath, | |
757 | child->name); | |
5bce33b3 RW |
758 | data = nb_node_child->cbs.get_elem(xpath_child, list_entry); |
759 | if (data) { | |
760 | if (data->value) | |
1a4bc045 RW |
761 | CONFD_SET_STR(v, data->value); |
762 | else { | |
763 | /* Presence containers and empty leafs. */ | |
764 | CONFD_SET_XMLTAG( | |
765 | v, nb_node_child->confd_hash, | |
766 | confd_str2hash(nb_node_child->snode | |
767 | ->module->ns)); | |
768 | } | |
5bce33b3 RW |
769 | listnode_add(elements, data); |
770 | } else | |
1a4bc045 | 771 | CONFD_SET_NOEXISTS(v); |
5bce33b3 RW |
772 | } |
773 | ||
1a4bc045 | 774 | confd_data_reply_value_array(tctx, values, nvalues); |
5bce33b3 RW |
775 | |
776 | /* Release memory. */ | |
5bce33b3 RW |
777 | list_delete(&elements); |
778 | ||
779 | return CONFD_OK; | |
780 | } | |
781 | ||
782 | /* | |
783 | * Optional callback - implemented for performance reasons. | |
784 | */ | |
785 | static int frr_confd_data_get_next_object(struct confd_trans_ctx *tctx, | |
786 | confd_hkeypath_t *kp, long next) | |
787 | { | |
788 | char xpath[BUFSIZ]; | |
5bce33b3 | 789 | struct nb_node *nb_node; |
5bce33b3 | 790 | struct list *elements; |
1a4bc045 | 791 | const void *parent_list_entry; |
5bce33b3 RW |
792 | const void *nb_next; |
793 | #define CONFD_OBJECTS_PER_TIME 100 | |
794 | struct confd_next_object objects[CONFD_OBJECTS_PER_TIME + 1]; | |
795 | int nobjects = 0; | |
796 | ||
797 | frr_confd_get_xpath(kp, xpath, sizeof(xpath)); | |
798 | ||
799 | nb_node = nb_node_find(xpath); | |
800 | if (!nb_node) { | |
801 | flog_warn(EC_LIB_YANG_UNKNOWN_DATA_PATH, | |
802 | "%s: unknown data path: %s", __func__, xpath); | |
803 | confd_data_reply_next_object_array(tctx, NULL, 0, 0); | |
804 | return CONFD_OK; | |
805 | } | |
806 | ||
1a4bc045 RW |
807 | if (frr_confd_hkeypath_get_list_entry(kp, nb_node, &parent_list_entry) |
808 | != 0) { | |
809 | confd_data_reply_next_object_array(tctx, NULL, 0, 0); | |
810 | return CONFD_OK; | |
5bce33b3 RW |
811 | } |
812 | ||
813 | elements = yang_data_list_new(); | |
814 | nb_next = (next == -1) ? NULL : (void *)next; | |
815 | ||
816 | memset(objects, 0, sizeof(objects)); | |
817 | for (int j = 0; j < CONFD_OBJECTS_PER_TIME; j++) { | |
818 | struct confd_next_object *object; | |
1a4bc045 | 819 | struct lys_node *child; |
5bce33b3 | 820 | struct yang_data *data; |
1a4bc045 | 821 | size_t nvalues = 0; |
5bce33b3 RW |
822 | |
823 | object = &objects[j]; | |
824 | ||
1a4bc045 | 825 | nb_next = nb_node->cbs.get_next(parent_list_entry, nb_next); |
5bce33b3 RW |
826 | if (!nb_next) |
827 | /* End of the list. */ | |
828 | break; | |
829 | ||
5bce33b3 RW |
830 | object->next = (long)nb_next; |
831 | ||
1a4bc045 RW |
832 | /* Leaf-lists require special handling. */ |
833 | if (nb_node->snode->nodetype == LYS_LEAFLIST) { | |
834 | object->v = XMALLOC(MTYPE_CONFD, sizeof(confd_value_t)); | |
835 | data = nb_node->cbs.get_elem(xpath, nb_next); | |
836 | assert(data && data->value); | |
837 | CONFD_SET_STR(object->v, data->value); | |
838 | nvalues++; | |
839 | listnode_add(elements, data); | |
840 | goto next; | |
5bce33b3 RW |
841 | } |
842 | ||
1a4bc045 RW |
843 | object->v = |
844 | XMALLOC(MTYPE_CONFD, | |
845 | CONFD_MAX_CHILD_NODES * sizeof(confd_value_t)); | |
5bce33b3 RW |
846 | |
847 | /* Loop through list child nodes. */ | |
1a4bc045 RW |
848 | LY_TREE_FOR (nb_node->snode->child, child) { |
849 | struct nb_node *nb_node_child = child->priv; | |
5bce33b3 | 850 | char xpath_child[XPATH_MAXLEN]; |
1a4bc045 | 851 | confd_value_t *v; |
5bce33b3 | 852 | |
1a4bc045 RW |
853 | if (nvalues > CONFD_MAX_CHILD_NODES) |
854 | break; | |
5bce33b3 | 855 | |
1a4bc045 RW |
856 | v = &object->v[nvalues++]; |
857 | ||
858 | /* Non-presence containers, lists and leaf-lists. */ | |
859 | if (!nb_node_child->cbs.get_elem) { | |
860 | CONFD_SET_NOEXISTS(v); | |
861 | continue; | |
862 | } | |
5bce33b3 RW |
863 | |
864 | snprintf(xpath_child, sizeof(xpath_child), "%s/%s", | |
865 | xpath, child->name); | |
5bce33b3 | 866 | data = nb_node_child->cbs.get_elem(xpath_child, |
1a4bc045 | 867 | nb_next); |
5bce33b3 RW |
868 | if (data) { |
869 | if (data->value) | |
870 | CONFD_SET_STR(v, data->value); | |
1a4bc045 RW |
871 | else { |
872 | /* | |
873 | * Presence containers and empty leafs. | |
874 | */ | |
875 | CONFD_SET_XMLTAG( | |
876 | v, nb_node_child->confd_hash, | |
877 | confd_str2hash( | |
878 | nb_node_child->snode | |
879 | ->module->ns)); | |
880 | } | |
5bce33b3 RW |
881 | listnode_add(elements, data); |
882 | } else | |
883 | CONFD_SET_NOEXISTS(v); | |
884 | } | |
1a4bc045 RW |
885 | next: |
886 | object->n = nvalues; | |
5bce33b3 RW |
887 | nobjects++; |
888 | } | |
5bce33b3 RW |
889 | |
890 | if (nobjects == 0) { | |
891 | confd_data_reply_next_object_array(tctx, NULL, 0, 0); | |
892 | list_delete(&elements); | |
893 | return CONFD_OK; | |
894 | } | |
895 | ||
896 | /* Detect end of the list. */ | |
897 | if (!nb_next) { | |
898 | nobjects++; | |
899 | objects[nobjects].v = NULL; | |
900 | } | |
901 | ||
902 | /* Reply to ConfD. */ | |
903 | confd_data_reply_next_object_arrays(tctx, objects, nobjects, 0); | |
904 | if (!nb_next) | |
905 | nobjects--; | |
906 | ||
907 | /* Release memory. */ | |
908 | list_delete(&elements); | |
909 | for (int j = 0; j < nobjects; j++) { | |
910 | struct confd_next_object *object; | |
911 | ||
912 | object = &objects[j]; | |
913 | XFREE(MTYPE_CONFD, object->v); | |
914 | } | |
915 | ||
916 | return CONFD_OK; | |
917 | } | |
918 | ||
919 | static int frr_confd_notification_send(const char *xpath, | |
920 | struct list *arguments) | |
921 | { | |
922 | struct nb_node *nb_node; | |
923 | struct yang_module *module; | |
924 | struct confd_datetime now; | |
925 | confd_tag_value_t *values; | |
926 | int nvalues; | |
927 | int i = 0; | |
928 | struct yang_data *data; | |
929 | struct listnode *node; | |
930 | int ret; | |
931 | ||
932 | nb_node = nb_node_find(xpath); | |
933 | if (!nb_node) { | |
934 | flog_warn(EC_LIB_YANG_UNKNOWN_DATA_PATH, | |
935 | "%s: unknown data path: %s", __func__, xpath); | |
936 | return -1; | |
937 | } | |
938 | module = yang_module_find(nb_node->snode->module->name); | |
939 | assert(module); | |
940 | ||
941 | nvalues = 2; | |
942 | if (arguments) | |
943 | nvalues += listcount(arguments); | |
944 | ||
945 | values = XMALLOC(MTYPE_CONFD, nvalues * sizeof(*values)); | |
946 | ||
947 | CONFD_SET_TAG_XMLBEGIN(&values[i++], nb_node->confd_hash, | |
948 | module->confd_hash); | |
949 | for (ALL_LIST_ELEMENTS_RO(arguments, node, data)) { | |
80243aef RW |
950 | struct nb_node *nb_node_arg; |
951 | ||
952 | nb_node_arg = nb_node_find(data->xpath); | |
953 | if (!nb_node_arg) { | |
954 | flog_warn(EC_LIB_YANG_UNKNOWN_DATA_PATH, | |
955 | "%s: unknown data path: %s", __func__, | |
956 | data->xpath); | |
957 | XFREE(MTYPE_CONFD, values); | |
958 | return NB_ERR; | |
959 | } | |
5bce33b3 | 960 | |
80243aef | 961 | CONFD_SET_TAG_STR(&values[i++], nb_node_arg->confd_hash, |
5bce33b3 RW |
962 | data->value); |
963 | } | |
964 | CONFD_SET_TAG_XMLEND(&values[i++], nb_node->confd_hash, | |
965 | module->confd_hash); | |
966 | ||
967 | getdatetime(&now); | |
968 | ret = confd_notification_send(live_ctx, &now, values, nvalues); | |
969 | ||
970 | /* Release memory. */ | |
971 | XFREE(MTYPE_CONFD, values); | |
972 | ||
973 | /* Map ConfD return code to northbound return code. */ | |
974 | switch (ret) { | |
975 | case CONFD_OK: | |
976 | return NB_OK; | |
977 | default: | |
978 | return NB_ERR; | |
979 | } | |
980 | } | |
981 | ||
982 | static int frr_confd_action_init(struct confd_user_info *uinfo) | |
983 | { | |
984 | confd_action_set_fd(uinfo, dp_worker_sock); | |
985 | ||
986 | return CONFD_OK; | |
987 | } | |
988 | ||
989 | static int frr_confd_action_execute(struct confd_user_info *uinfo, | |
990 | struct xml_tag *name, confd_hkeypath_t *kp, | |
991 | confd_tag_value_t *params, int nparams) | |
992 | { | |
993 | char xpath[BUFSIZ]; | |
994 | struct nb_node *nb_node; | |
995 | struct list *input; | |
996 | struct list *output; | |
997 | struct yang_data *data; | |
998 | confd_tag_value_t *reply; | |
999 | int ret = CONFD_OK; | |
1000 | ||
1001 | /* Getting the XPath is tricky. */ | |
1002 | if (kp) { | |
1003 | /* This is a YANG RPC. */ | |
1004 | frr_confd_get_xpath(kp, xpath, sizeof(xpath)); | |
1005 | strlcat(xpath, "/", sizeof(xpath)); | |
1006 | strlcat(xpath, confd_hash2str(name->tag), sizeof(xpath)); | |
1007 | } else { | |
1008 | /* This is a YANG action. */ | |
1009 | snprintf(xpath, sizeof(xpath), "/%s:%s", | |
1010 | confd_ns2prefix(name->ns), confd_hash2str(name->tag)); | |
1011 | } | |
1012 | ||
1013 | nb_node = nb_node_find(xpath); | |
1014 | if (!nb_node) { | |
1015 | flog_warn(EC_LIB_YANG_UNKNOWN_DATA_PATH, | |
1016 | "%s: unknown data path: %s", __func__, xpath); | |
1017 | return CONFD_ERR; | |
1018 | } | |
1019 | ||
1020 | input = yang_data_list_new(); | |
1021 | output = yang_data_list_new(); | |
1022 | ||
1023 | /* Process input nodes. */ | |
1024 | for (int i = 0; i < nparams; i++) { | |
1025 | char xpath_input[BUFSIZ]; | |
1026 | char value_str[YANG_VALUE_MAXLEN]; | |
1027 | ||
1028 | snprintf(xpath_input, sizeof(xpath_input), "%s/%s", xpath, | |
1029 | confd_hash2str(params[i].tag.tag)); | |
1030 | ||
1031 | if (frr_confd_val2str(xpath_input, ¶ms[i].v, value_str, | |
1032 | sizeof(value_str)) | |
1033 | != 0) { | |
1034 | flog_err( | |
1035 | EC_LIB_CONFD_DATA_CONVERT, | |
1036 | "%s: failed to convert ConfD value to a string", | |
1037 | __func__); | |
1038 | ret = CONFD_ERR; | |
1039 | goto exit; | |
1040 | } | |
1041 | ||
1042 | data = yang_data_new(xpath_input, value_str); | |
1043 | listnode_add(input, data); | |
1044 | } | |
1045 | ||
1046 | /* Execute callback registered for this XPath. */ | |
1047 | if (nb_node->cbs.rpc(xpath, input, output) != NB_OK) { | |
1048 | flog_warn(EC_LIB_NB_CB_RPC, "%s: rpc callback failed: %s", | |
1049 | __func__, xpath); | |
1050 | ret = CONFD_ERR; | |
1051 | goto exit; | |
1052 | } | |
1053 | ||
1054 | /* Process output nodes. */ | |
1055 | if (listcount(output) > 0) { | |
1056 | struct listnode *node; | |
1057 | int i = 0; | |
1058 | ||
1059 | reply = XMALLOC(MTYPE_CONFD, | |
1060 | listcount(output) * sizeof(*reply)); | |
1061 | ||
1062 | for (ALL_LIST_ELEMENTS_RO(output, node, data)) { | |
80243aef | 1063 | struct nb_node *nb_node_output; |
5bce33b3 RW |
1064 | int hash; |
1065 | ||
80243aef RW |
1066 | nb_node_output = nb_node_find(data->xpath); |
1067 | if (!nb_node_output) { | |
1068 | flog_warn(EC_LIB_YANG_UNKNOWN_DATA_PATH, | |
1069 | "%s: unknown data path: %s", __func__, | |
1070 | data->xpath); | |
1071 | goto exit; | |
1072 | } | |
1073 | ||
1074 | hash = confd_str2hash(nb_node_output->snode->name); | |
5bce33b3 RW |
1075 | CONFD_SET_TAG_STR(&reply[i++], hash, data->value); |
1076 | } | |
1077 | confd_action_reply_values(uinfo, reply, listcount(output)); | |
1078 | XFREE(MTYPE_CONFD, reply); | |
1079 | } | |
1080 | ||
1081 | exit: | |
1082 | /* Release memory. */ | |
1083 | list_delete(&input); | |
1084 | list_delete(&output); | |
1085 | ||
1086 | return ret; | |
1087 | } | |
1088 | ||
1089 | ||
1090 | static int frr_confd_dp_read(struct thread *thread) | |
1091 | { | |
1092 | struct confd_daemon_ctx *dctx = THREAD_ARG(thread); | |
1093 | int fd = THREAD_FD(thread); | |
1094 | int ret; | |
1095 | ||
1096 | thread = NULL; | |
1097 | thread_add_read(master, frr_confd_dp_read, dctx, fd, &thread); | |
1098 | ||
1099 | ret = confd_fd_ready(dctx, fd); | |
1100 | if (ret == CONFD_EOF) { | |
1101 | flog_err_confd("confd_fd_ready"); | |
a7d055e4 | 1102 | frr_confd_finish(); |
5bce33b3 RW |
1103 | return -1; |
1104 | } else if (ret == CONFD_ERR && confd_errno != CONFD_ERR_EXTERNAL) { | |
1105 | flog_err_confd("confd_fd_ready"); | |
a7d055e4 | 1106 | frr_confd_finish(); |
5bce33b3 RW |
1107 | return -1; |
1108 | } | |
1109 | ||
1110 | return 0; | |
1111 | } | |
1112 | ||
e0ccfad2 | 1113 | static int frr_confd_subscribe_state(const struct lys_node *snode, void *arg) |
5bce33b3 RW |
1114 | { |
1115 | struct nb_node *nb_node = snode->priv; | |
e0ccfad2 | 1116 | struct confd_data_cbs *data_cbs = arg; |
5bce33b3 | 1117 | |
db452508 | 1118 | if (!CHECK_FLAG(snode->flags, LYS_CONFIG_R)) |
e0ccfad2 | 1119 | return YANG_ITER_CONTINUE; |
5bce33b3 | 1120 | /* We only need to subscribe to the root of the state subtrees. */ |
db452508 | 1121 | if (snode->parent && CHECK_FLAG(snode->parent->flags, LYS_CONFIG_R)) |
e0ccfad2 | 1122 | return YANG_ITER_CONTINUE; |
5bce33b3 RW |
1123 | |
1124 | if (debug_northbound) | |
1125 | zlog_debug("%s: providing data to '%s' (callpoint %s)", | |
1126 | __func__, nb_node->xpath, snode->name); | |
1127 | ||
1128 | strlcpy(data_cbs->callpoint, snode->name, sizeof(data_cbs->callpoint)); | |
1129 | if (confd_register_data_cb(dctx, data_cbs) != CONFD_OK) | |
1130 | flog_err_confd("confd_register_data_cb"); | |
e0ccfad2 RW |
1131 | |
1132 | return YANG_ITER_CONTINUE; | |
5bce33b3 RW |
1133 | } |
1134 | ||
1135 | static int frr_confd_init_dp(const char *program_name) | |
1136 | { | |
1137 | struct confd_trans_cbs trans_cbs; | |
1138 | struct confd_data_cbs data_cbs; | |
1139 | struct confd_notification_stream_cbs ncbs; | |
1140 | struct confd_action_cbs acbs; | |
1141 | ||
1142 | /* Initialize daemon context. */ | |
1143 | dctx = confd_init_daemon(program_name); | |
1144 | if (!dctx) { | |
1145 | flog_err_confd("confd_init_daemon"); | |
1146 | goto error; | |
1147 | } | |
1148 | ||
1149 | /* | |
1150 | * Inform we want to receive YANG values as raw strings, and that we | |
1151 | * want to provide only strings in the reply functions, regardless of | |
1152 | * the YANG type. | |
1153 | */ | |
1154 | confd_set_daemon_flags(dctx, CONFD_DAEMON_FLAG_STRINGSONLY); | |
1155 | ||
1156 | /* Establish a control socket. */ | |
1157 | dp_ctl_sock = socket(PF_INET, SOCK_STREAM, 0); | |
1158 | if (dp_ctl_sock < 0) { | |
1159 | flog_err(EC_LIB_SOCKET, "%s: failed to create socket: %s", | |
1160 | __func__, safe_strerror(errno)); | |
1161 | goto error; | |
1162 | } | |
1163 | ||
1164 | if (confd_connect(dctx, dp_ctl_sock, CONTROL_SOCKET, &confd_addr, | |
1165 | sizeof(struct sockaddr_in)) | |
1166 | != CONFD_OK) { | |
1167 | flog_err_confd("confd_connect"); | |
1168 | goto error; | |
1169 | } | |
1170 | ||
1171 | /* | |
1172 | * Establish a worker socket (only one since this plugin runs on a | |
1173 | * single thread). | |
1174 | */ | |
1175 | dp_worker_sock = socket(PF_INET, SOCK_STREAM, 0); | |
1176 | if (dp_worker_sock < 0) { | |
1177 | flog_err(EC_LIB_SOCKET, "%s: failed to create socket: %s", | |
1178 | __func__, safe_strerror(errno)); | |
1179 | goto error; | |
1180 | } | |
1181 | if (confd_connect(dctx, dp_worker_sock, WORKER_SOCKET, &confd_addr, | |
1182 | sizeof(struct sockaddr_in)) | |
1183 | != CONFD_OK) { | |
1184 | flog_err_confd("confd_connect"); | |
1185 | goto error; | |
1186 | } | |
1187 | ||
1188 | /* Register transaction callback functions. */ | |
1189 | memset(&trans_cbs, 0, sizeof(trans_cbs)); | |
1190 | trans_cbs.init = frr_confd_transaction_init; | |
1191 | confd_register_trans_cb(dctx, &trans_cbs); | |
1192 | ||
1193 | /* Register our read/write callbacks. */ | |
1194 | memset(&data_cbs, 0, sizeof(data_cbs)); | |
1195 | data_cbs.get_elem = frr_confd_data_get_elem; | |
1196 | data_cbs.exists_optional = frr_confd_data_get_elem; | |
1197 | data_cbs.get_next = frr_confd_data_get_next; | |
1198 | data_cbs.get_object = frr_confd_data_get_object; | |
1199 | data_cbs.get_next_object = frr_confd_data_get_next_object; | |
1200 | ||
1201 | /* | |
1202 | * Iterate over all loaded YANG modules and subscribe to the paths | |
1203 | * referent to state data. | |
1204 | */ | |
e0ccfad2 | 1205 | yang_snodes_iterate_all(frr_confd_subscribe_state, 0, &data_cbs); |
5bce33b3 RW |
1206 | |
1207 | /* Register notification stream. */ | |
1208 | memset(&ncbs, 0, sizeof(ncbs)); | |
1209 | ncbs.fd = dp_worker_sock; | |
1210 | /* | |
1211 | * RFC 5277 - Section 3.2.3: | |
1212 | * A NETCONF server implementation supporting the notification | |
1213 | * capability MUST support the "NETCONF" notification event | |
1214 | * stream. This stream contains all NETCONF XML event notifications | |
1215 | * supported by the NETCONF server. | |
1216 | */ | |
1217 | strlcpy(ncbs.streamname, "NETCONF", sizeof(ncbs.streamname)); | |
1218 | if (confd_register_notification_stream(dctx, &ncbs, &live_ctx) | |
1219 | != CONFD_OK) { | |
1220 | flog_err_confd("confd_register_notification_stream"); | |
1221 | goto error; | |
1222 | } | |
1223 | ||
1224 | /* Register the action handler callback. */ | |
1225 | memset(&acbs, 0, sizeof(acbs)); | |
1226 | strlcpy(acbs.actionpoint, "actionpoint", sizeof(acbs.actionpoint)); | |
1227 | acbs.init = frr_confd_action_init; | |
1228 | acbs.action = frr_confd_action_execute; | |
1229 | if (confd_register_action_cbs(dctx, &acbs) != CONFD_OK) { | |
1230 | flog_err_confd("confd_register_action_cbs"); | |
1231 | goto error; | |
1232 | } | |
1233 | ||
1234 | /* Notify we registered all callbacks we wanted. */ | |
1235 | if (confd_register_done(dctx) != CONFD_OK) { | |
1236 | flog_err_confd("confd_register_done"); | |
1237 | goto error; | |
1238 | } | |
1239 | ||
1240 | thread_add_read(master, frr_confd_dp_read, dctx, dp_ctl_sock, | |
1241 | &t_dp_ctl); | |
1242 | thread_add_read(master, frr_confd_dp_read, dctx, dp_worker_sock, | |
1243 | &t_dp_worker); | |
1244 | ||
1245 | return 0; | |
1246 | ||
1247 | error: | |
1248 | frr_confd_finish_dp(); | |
1249 | ||
1250 | return -1; | |
1251 | } | |
1252 | ||
1253 | static void frr_confd_finish_dp(void) | |
1254 | { | |
1255 | if (dp_worker_sock > 0) { | |
1256 | THREAD_OFF(t_dp_worker); | |
1257 | close(dp_worker_sock); | |
1258 | } | |
1259 | if (dp_ctl_sock > 0) { | |
1260 | THREAD_OFF(t_dp_ctl); | |
1261 | close(dp_ctl_sock); | |
1262 | } | |
1263 | if (dctx != NULL) | |
1264 | confd_release_daemon(dctx); | |
1265 | } | |
1266 | ||
1267 | /* ------------ Main ------------ */ | |
1268 | ||
e0ccfad2 RW |
1269 | static int frr_confd_calculate_snode_hash(const struct lys_node *snode, |
1270 | void *arg) | |
5bce33b3 RW |
1271 | { |
1272 | struct nb_node *nb_node = snode->priv; | |
1273 | ||
1274 | nb_node->confd_hash = confd_str2hash(snode->name); | |
e0ccfad2 RW |
1275 | |
1276 | return YANG_ITER_CONTINUE; | |
5bce33b3 RW |
1277 | } |
1278 | ||
1279 | static int frr_confd_init(const char *program_name) | |
1280 | { | |
1281 | struct sockaddr_in *confd_addr4 = (struct sockaddr_in *)&confd_addr; | |
1282 | int debuglevel = CONFD_SILENT; | |
1283 | int ret = -1; | |
1284 | ||
1285 | /* Initialize ConfD library. */ | |
1286 | confd_init(program_name, stderr, debuglevel); | |
1287 | ||
1288 | confd_addr4->sin_family = AF_INET; | |
1289 | confd_addr4->sin_addr.s_addr = inet_addr("127.0.0.1"); | |
1290 | confd_addr4->sin_port = htons(CONFD_PORT); | |
1291 | if (confd_load_schemas(&confd_addr, sizeof(struct sockaddr_in)) | |
1292 | != CONFD_OK) { | |
1293 | flog_err_confd("confd_load_schemas"); | |
1294 | return -1; | |
1295 | } | |
1296 | ||
1297 | ret = frr_confd_init_cdb(); | |
1298 | if (ret != 0) | |
1299 | goto error; | |
1300 | ||
1301 | ret = frr_confd_init_dp(program_name); | |
1302 | if (ret != 0) { | |
1303 | frr_confd_finish_cdb(); | |
1304 | goto error; | |
1305 | } | |
1306 | ||
e0ccfad2 | 1307 | yang_snodes_iterate_all(frr_confd_calculate_snode_hash, 0, NULL); |
5bce33b3 RW |
1308 | |
1309 | hook_register(nb_notification_send, frr_confd_notification_send); | |
1310 | ||
1311 | confd_connected = true; | |
1312 | return 0; | |
1313 | ||
1314 | error: | |
1315 | confd_free_schemas(); | |
1316 | ||
1317 | return ret; | |
1318 | } | |
1319 | ||
1320 | static int frr_confd_finish(void) | |
1321 | { | |
1322 | if (confd_connected == false) | |
1323 | return 0; | |
1324 | ||
1325 | frr_confd_finish_cdb(); | |
1326 | frr_confd_finish_dp(); | |
1327 | ||
1328 | confd_free_schemas(); | |
1329 | ||
1330 | confd_connected = false; | |
1331 | ||
1332 | return 0; | |
1333 | } | |
1334 | ||
1335 | static int frr_confd_module_late_init(struct thread_master *tm) | |
1336 | { | |
1337 | master = tm; | |
1338 | ||
1339 | if (frr_confd_init(frr_get_progname()) < 0) { | |
1340 | flog_err(EC_LIB_CONFD_INIT, | |
1341 | "failed to initialize the ConfD module"); | |
1342 | return -1; | |
1343 | } | |
1344 | ||
1345 | hook_register(frr_fini, frr_confd_finish); | |
1346 | ||
1347 | return 0; | |
1348 | } | |
1349 | ||
1350 | static int frr_confd_module_init(void) | |
1351 | { | |
1352 | hook_register(frr_late_init, frr_confd_module_late_init); | |
1353 | ||
1354 | return 0; | |
1355 | } | |
1356 | ||
1357 | FRR_MODULE_SETUP(.name = "frr_confd", .version = FRR_VERSION, | |
1358 | .description = "FRR ConfD integration module", | |
1359 | .init = frr_confd_module_init, ) |