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1c2facd1 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 "log_int.h" | |
24 | #include "lib_errors.h" | |
25 | #include "yang.h" | |
26 | #include "yang_translator.h" | |
27 | #include "northbound.h" | |
28 | ||
29 | DEFINE_MTYPE(LIB, YANG_MODULE, "YANG module") | |
30 | DEFINE_MTYPE(LIB, YANG_DATA, "YANG data structure") | |
31 | ||
32 | /* libyang container. */ | |
33 | struct ly_ctx *ly_native_ctx; | |
34 | ||
3a11599c DL |
35 | static struct yang_module_embed *embeds, **embedupd = &embeds; |
36 | ||
37 | void yang_module_embed(struct yang_module_embed *embed) | |
38 | { | |
39 | embed->next = NULL; | |
40 | *embedupd = embed; | |
41 | embedupd = &embed->next; | |
42 | } | |
43 | ||
44 | static const char *yang_module_imp_clb(const char *mod_name, | |
45 | const char *mod_rev, | |
46 | const char *submod_name, | |
47 | const char *submod_rev, | |
48 | void *user_data, | |
49 | LYS_INFORMAT *format, | |
50 | void (**free_module_data) | |
51 | (void *, void*)) | |
52 | { | |
53 | struct yang_module_embed *e; | |
54 | ||
55 | if (submod_name || submod_rev) | |
56 | return NULL; | |
57 | ||
58 | for (e = embeds; e; e = e->next) { | |
59 | if (strcmp(e->mod_name, mod_name)) | |
60 | continue; | |
61 | if (mod_rev && strcmp(e->mod_rev, mod_rev)) | |
62 | continue; | |
63 | ||
64 | *format = e->format; | |
65 | return e->data; | |
66 | } | |
67 | ||
68 | flog_warn(EC_LIB_YANG_MODULE_LOAD, | |
69 | "YANG model \"%s@%s\" not embedded, trying external file", | |
70 | mod_name, mod_rev ? mod_rev : "*"); | |
71 | return NULL; | |
72 | } | |
73 | ||
a1b5f469 RW |
74 | static const char * const frr_native_modules[] = { |
75 | "frr-interface", | |
76 | "frr-ripd", | |
e9ce224b | 77 | "frr-ripngd", |
a1b5f469 RW |
78 | }; |
79 | ||
1c2facd1 RW |
80 | /* Generate the yang_modules tree. */ |
81 | static inline int yang_module_compare(const struct yang_module *a, | |
82 | const struct yang_module *b) | |
83 | { | |
84 | return strcmp(a->name, b->name); | |
85 | } | |
86 | RB_GENERATE(yang_modules, yang_module, entry, yang_module_compare) | |
87 | ||
88 | struct yang_modules yang_modules = RB_INITIALIZER(&yang_modules); | |
89 | ||
90 | struct yang_module *yang_module_load(const char *module_name) | |
91 | { | |
92 | struct yang_module *module; | |
93 | const struct lys_module *module_info; | |
94 | ||
95 | module_info = ly_ctx_load_module(ly_native_ctx, module_name, NULL); | |
96 | if (!module_info) { | |
97 | flog_err(EC_LIB_YANG_MODULE_LOAD, | |
98 | "%s: failed to load data model: %s", __func__, | |
99 | module_name); | |
100 | exit(1); | |
101 | } | |
102 | ||
103 | module = XCALLOC(MTYPE_YANG_MODULE, sizeof(*module)); | |
104 | module->name = module_name; | |
105 | module->info = module_info; | |
106 | ||
107 | if (RB_INSERT(yang_modules, &yang_modules, module) != NULL) { | |
108 | flog_err(EC_LIB_YANG_MODULE_LOADED_ALREADY, | |
109 | "%s: YANG module is loaded already: %s", __func__, | |
110 | module_name); | |
111 | exit(1); | |
112 | } | |
113 | ||
114 | return module; | |
115 | } | |
116 | ||
a1b5f469 RW |
117 | void yang_module_load_all(void) |
118 | { | |
119 | for (size_t i = 0; i < array_size(frr_native_modules); i++) | |
120 | yang_module_load(frr_native_modules[i]); | |
121 | } | |
122 | ||
1c2facd1 RW |
123 | struct yang_module *yang_module_find(const char *module_name) |
124 | { | |
125 | struct yang_module s; | |
126 | ||
127 | s.name = module_name; | |
128 | return RB_FIND(yang_modules, &yang_modules, &s); | |
129 | } | |
130 | ||
e0ccfad2 RW |
131 | int yang_snodes_iterate_subtree(const struct lys_node *snode, |
132 | yang_iterate_cb cb, uint16_t flags, void *arg) | |
1c2facd1 RW |
133 | { |
134 | struct lys_node *child; | |
e0ccfad2 | 135 | int ret = YANG_ITER_CONTINUE; |
1c2facd1 RW |
136 | |
137 | if (CHECK_FLAG(flags, YANG_ITER_FILTER_IMPLICIT)) { | |
138 | switch (snode->nodetype) { | |
139 | case LYS_CASE: | |
140 | case LYS_INPUT: | |
141 | case LYS_OUTPUT: | |
db452508 | 142 | if (CHECK_FLAG(snode->flags, LYS_IMPLICIT)) |
1c2facd1 RW |
143 | goto next; |
144 | break; | |
145 | default: | |
146 | break; | |
147 | } | |
148 | } | |
149 | ||
150 | switch (snode->nodetype) { | |
151 | case LYS_CONTAINER: | |
152 | if (CHECK_FLAG(flags, YANG_ITER_FILTER_NPCONTAINERS)) { | |
153 | struct lys_node_container *scontainer; | |
154 | ||
155 | scontainer = (struct lys_node_container *)snode; | |
156 | if (!scontainer->presence) | |
157 | goto next; | |
158 | } | |
159 | break; | |
160 | case LYS_LEAF: | |
161 | if (CHECK_FLAG(flags, YANG_ITER_FILTER_LIST_KEYS)) { | |
162 | struct lys_node_leaf *sleaf; | |
163 | ||
164 | /* Ignore list keys. */ | |
165 | sleaf = (struct lys_node_leaf *)snode; | |
166 | if (lys_is_key(sleaf, NULL)) | |
167 | goto next; | |
168 | } | |
169 | break; | |
170 | case LYS_GROUPING: | |
171 | /* Return since we're not interested in the grouping subtree. */ | |
e0ccfad2 | 172 | return YANG_ITER_CONTINUE; |
1c2facd1 RW |
173 | case LYS_USES: |
174 | case LYS_AUGMENT: | |
175 | /* Always ignore nodes of these types. */ | |
176 | goto next; | |
177 | case LYS_INPUT: | |
178 | case LYS_OUTPUT: | |
179 | if (CHECK_FLAG(flags, YANG_ITER_FILTER_INPUT_OUTPUT)) | |
180 | goto next; | |
181 | break; | |
182 | default: | |
183 | break; | |
184 | } | |
185 | ||
e0ccfad2 RW |
186 | ret = (*cb)(snode, arg); |
187 | if (ret == YANG_ITER_STOP) | |
188 | return ret; | |
1c2facd1 RW |
189 | |
190 | next: | |
191 | /* | |
192 | * YANG leafs and leaf-lists can't have child nodes, and trying to | |
193 | * access snode->child is undefined behavior. | |
194 | */ | |
db452508 | 195 | if (CHECK_FLAG(snode->nodetype, LYS_LEAF | LYS_LEAFLIST)) |
e0ccfad2 | 196 | return YANG_ITER_CONTINUE; |
1c2facd1 RW |
197 | |
198 | LY_TREE_FOR (snode->child, child) { | |
544ca69a RW |
199 | if (!CHECK_FLAG(flags, YANG_ITER_ALLOW_AUGMENTATIONS) |
200 | && child->parent != snode) | |
1c2facd1 | 201 | continue; |
e0ccfad2 RW |
202 | |
203 | ret = yang_snodes_iterate_subtree(child, cb, flags, arg); | |
204 | if (ret == YANG_ITER_STOP) | |
205 | return ret; | |
1c2facd1 | 206 | } |
e0ccfad2 RW |
207 | |
208 | return ret; | |
1c2facd1 RW |
209 | } |
210 | ||
e0ccfad2 RW |
211 | int yang_snodes_iterate_module(const struct lys_module *module, |
212 | yang_iterate_cb cb, uint16_t flags, void *arg) | |
1c2facd1 RW |
213 | { |
214 | struct lys_node *snode; | |
e0ccfad2 | 215 | int ret = YANG_ITER_CONTINUE; |
1c2facd1 RW |
216 | |
217 | LY_TREE_FOR (module->data, snode) { | |
e0ccfad2 RW |
218 | ret = yang_snodes_iterate_subtree(snode, cb, flags, arg); |
219 | if (ret == YANG_ITER_STOP) | |
220 | return ret; | |
1c2facd1 RW |
221 | } |
222 | ||
223 | for (uint8_t i = 0; i < module->augment_size; i++) { | |
e0ccfad2 RW |
224 | ret = yang_snodes_iterate_subtree( |
225 | (const struct lys_node *)&module->augment[i], cb, flags, | |
226 | arg); | |
227 | if (ret == YANG_ITER_STOP) | |
228 | return ret; | |
1c2facd1 | 229 | } |
e0ccfad2 RW |
230 | |
231 | return ret; | |
1c2facd1 RW |
232 | } |
233 | ||
e0ccfad2 | 234 | int yang_snodes_iterate_all(yang_iterate_cb cb, uint16_t flags, void *arg) |
1c2facd1 RW |
235 | { |
236 | struct yang_module *module; | |
e0ccfad2 RW |
237 | int ret = YANG_ITER_CONTINUE; |
238 | ||
239 | RB_FOREACH (module, yang_modules, &yang_modules) { | |
240 | ret = yang_snodes_iterate_module(module->info, cb, flags, arg); | |
241 | if (ret == YANG_ITER_STOP) | |
242 | return ret; | |
243 | } | |
1c2facd1 | 244 | |
e0ccfad2 | 245 | return ret; |
1c2facd1 RW |
246 | } |
247 | ||
248 | void yang_snode_get_path(const struct lys_node *snode, enum yang_path_type type, | |
249 | char *xpath, size_t xpath_len) | |
250 | { | |
251 | char *xpath_ptr; | |
252 | ||
253 | switch (type) { | |
254 | case YANG_PATH_SCHEMA: | |
255 | xpath_ptr = lys_path(snode, 0); | |
256 | break; | |
257 | case YANG_PATH_DATA: | |
258 | xpath_ptr = lys_data_path(snode); | |
259 | break; | |
260 | default: | |
261 | flog_err(EC_LIB_DEVELOPMENT, "%s: unknown yang path type: %u", | |
262 | __func__, type); | |
263 | exit(1); | |
264 | } | |
265 | strlcpy(xpath, xpath_ptr, xpath_len); | |
266 | free(xpath_ptr); | |
267 | } | |
268 | ||
269 | struct lys_node *yang_snode_real_parent(const struct lys_node *snode) | |
270 | { | |
271 | struct lys_node *parent = snode->parent; | |
272 | ||
273 | while (parent) { | |
274 | struct lys_node_container *scontainer; | |
275 | ||
276 | switch (parent->nodetype) { | |
277 | case LYS_CONTAINER: | |
278 | scontainer = (struct lys_node_container *)parent; | |
279 | if (scontainer->presence) | |
280 | return parent; | |
281 | break; | |
282 | case LYS_LIST: | |
283 | return parent; | |
284 | default: | |
285 | break; | |
286 | } | |
287 | parent = parent->parent; | |
288 | } | |
289 | ||
290 | return NULL; | |
291 | } | |
292 | ||
293 | struct lys_node *yang_snode_parent_list(const struct lys_node *snode) | |
294 | { | |
295 | struct lys_node *parent = snode->parent; | |
296 | ||
297 | while (parent) { | |
298 | switch (parent->nodetype) { | |
299 | case LYS_LIST: | |
300 | return parent; | |
301 | default: | |
302 | break; | |
303 | } | |
304 | parent = parent->parent; | |
305 | } | |
306 | ||
307 | return NULL; | |
308 | } | |
309 | ||
310 | bool yang_snode_is_typeless_data(const struct lys_node *snode) | |
311 | { | |
312 | struct lys_node_leaf *sleaf; | |
313 | ||
314 | switch (snode->nodetype) { | |
315 | case LYS_LEAF: | |
316 | sleaf = (struct lys_node_leaf *)snode; | |
317 | if (sleaf->type.base == LY_TYPE_EMPTY) | |
318 | return true; | |
319 | return false; | |
320 | case LYS_LEAFLIST: | |
321 | return false; | |
322 | default: | |
323 | return true; | |
324 | } | |
325 | } | |
326 | ||
327 | const char *yang_snode_get_default(const struct lys_node *snode) | |
328 | { | |
329 | struct lys_node_leaf *sleaf; | |
330 | ||
331 | switch (snode->nodetype) { | |
332 | case LYS_LEAF: | |
333 | sleaf = (struct lys_node_leaf *)snode; | |
334 | ||
335 | /* NOTE: this might be null. */ | |
336 | return sleaf->dflt; | |
337 | case LYS_LEAFLIST: | |
338 | /* TODO: check leaf-list default values */ | |
339 | return NULL; | |
340 | default: | |
341 | return NULL; | |
342 | } | |
343 | } | |
344 | ||
345 | const struct lys_type *yang_snode_get_type(const struct lys_node *snode) | |
346 | { | |
347 | struct lys_node_leaf *sleaf = (struct lys_node_leaf *)snode; | |
348 | struct lys_type *type; | |
349 | ||
db452508 | 350 | if (!CHECK_FLAG(sleaf->nodetype, LYS_LEAF | LYS_LEAFLIST)) |
1c2facd1 RW |
351 | return NULL; |
352 | ||
353 | type = &sleaf->type; | |
354 | while (type->base == LY_TYPE_LEAFREF) | |
355 | type = &type->info.lref.target->type; | |
356 | ||
357 | return type; | |
358 | } | |
359 | ||
360 | void yang_dnode_get_path(const struct lyd_node *dnode, char *xpath, | |
361 | size_t xpath_len) | |
362 | { | |
363 | char *xpath_ptr; | |
364 | ||
365 | xpath_ptr = lyd_path(dnode); | |
366 | strlcpy(xpath, xpath_ptr, xpath_len); | |
367 | free(xpath_ptr); | |
368 | } | |
369 | ||
3f662078 RW |
370 | const char *yang_dnode_get_schema_name(const struct lyd_node *dnode, |
371 | const char *xpath_fmt, ...) | |
372 | { | |
373 | if (xpath_fmt) { | |
374 | va_list ap; | |
375 | char xpath[XPATH_MAXLEN]; | |
376 | ||
377 | va_start(ap, xpath_fmt); | |
378 | vsnprintf(xpath, sizeof(xpath), xpath_fmt, ap); | |
379 | va_end(ap); | |
380 | ||
381 | dnode = yang_dnode_get(dnode, xpath); | |
382 | if (!dnode) { | |
383 | flog_err(EC_LIB_YANG_DNODE_NOT_FOUND, | |
384 | "%s: couldn't find %s", __func__, xpath); | |
385 | zlog_backtrace(LOG_ERR); | |
386 | abort(); | |
387 | } | |
388 | } | |
389 | ||
390 | return dnode->schema->name; | |
391 | } | |
392 | ||
1c2facd1 RW |
393 | struct lyd_node *yang_dnode_get(const struct lyd_node *dnode, |
394 | const char *xpath_fmt, ...) | |
395 | { | |
396 | va_list ap; | |
397 | char xpath[XPATH_MAXLEN]; | |
398 | struct ly_set *set; | |
399 | struct lyd_node *dnode_ret = NULL; | |
400 | ||
401 | va_start(ap, xpath_fmt); | |
402 | vsnprintf(xpath, sizeof(xpath), xpath_fmt, ap); | |
403 | va_end(ap); | |
404 | ||
405 | set = lyd_find_path(dnode, xpath); | |
406 | assert(set); | |
407 | if (set->number == 0) | |
408 | goto exit; | |
409 | ||
410 | if (set->number > 1) { | |
411 | flog_warn(EC_LIB_YANG_DNODE_NOT_FOUND, | |
412 | "%s: found %u elements (expected 0 or 1) [xpath %s]", | |
413 | __func__, set->number, xpath); | |
414 | goto exit; | |
415 | } | |
416 | ||
417 | dnode_ret = set->set.d[0]; | |
418 | ||
419 | exit: | |
420 | ly_set_free(set); | |
421 | ||
422 | return dnode_ret; | |
423 | } | |
424 | ||
425 | bool yang_dnode_exists(const struct lyd_node *dnode, const char *xpath_fmt, ...) | |
426 | { | |
427 | va_list ap; | |
428 | char xpath[XPATH_MAXLEN]; | |
429 | struct ly_set *set; | |
430 | bool found; | |
431 | ||
432 | va_start(ap, xpath_fmt); | |
433 | vsnprintf(xpath, sizeof(xpath), xpath_fmt, ap); | |
434 | va_end(ap); | |
435 | ||
436 | set = lyd_find_path(dnode, xpath); | |
437 | assert(set); | |
438 | found = (set->number > 0); | |
439 | ly_set_free(set); | |
440 | ||
441 | return found; | |
442 | } | |
443 | ||
444 | bool yang_dnode_is_default(const struct lyd_node *dnode, const char *xpath_fmt, | |
445 | ...) | |
446 | { | |
447 | struct lys_node *snode; | |
448 | struct lys_node_leaf *sleaf; | |
449 | struct lys_node_container *scontainer; | |
450 | ||
451 | if (xpath_fmt) { | |
452 | va_list ap; | |
453 | char xpath[XPATH_MAXLEN]; | |
454 | ||
455 | va_start(ap, xpath_fmt); | |
456 | vsnprintf(xpath, sizeof(xpath), xpath_fmt, ap); | |
457 | va_end(ap); | |
458 | ||
459 | dnode = yang_dnode_get(dnode, xpath); | |
460 | } | |
461 | ||
462 | assert(dnode); | |
463 | snode = dnode->schema; | |
464 | switch (snode->nodetype) { | |
465 | case LYS_LEAF: | |
466 | sleaf = (struct lys_node_leaf *)snode; | |
467 | if (sleaf->type.base == LY_TYPE_EMPTY) | |
468 | return false; | |
469 | return lyd_wd_default((struct lyd_node_leaf_list *)dnode); | |
470 | case LYS_LEAFLIST: | |
471 | /* TODO: check leaf-list default values */ | |
472 | return false; | |
473 | case LYS_CONTAINER: | |
474 | scontainer = (struct lys_node_container *)snode; | |
475 | if (scontainer->presence) | |
476 | return false; | |
477 | return true; | |
478 | default: | |
479 | return false; | |
480 | } | |
481 | } | |
482 | ||
483 | bool yang_dnode_is_default_recursive(const struct lyd_node *dnode) | |
484 | { | |
485 | struct lys_node *snode; | |
486 | struct lyd_node *root, *next, *dnode_iter; | |
487 | ||
488 | snode = dnode->schema; | |
db452508 | 489 | if (CHECK_FLAG(snode->nodetype, LYS_LEAF | LYS_LEAFLIST)) |
1c2facd1 RW |
490 | return yang_dnode_is_default(dnode, NULL); |
491 | ||
492 | if (!yang_dnode_is_default(dnode, NULL)) | |
493 | return false; | |
494 | ||
495 | LY_TREE_FOR (dnode->child, root) { | |
496 | LY_TREE_DFS_BEGIN (root, next, dnode_iter) { | |
497 | if (!yang_dnode_is_default(dnode_iter, NULL)) | |
498 | return false; | |
499 | ||
500 | LY_TREE_DFS_END(root, next, dnode_iter); | |
501 | } | |
502 | } | |
503 | ||
504 | return true; | |
505 | } | |
506 | ||
507 | void yang_dnode_change_leaf(struct lyd_node *dnode, const char *value) | |
508 | { | |
509 | assert(dnode->schema->nodetype == LYS_LEAF); | |
510 | lyd_change_leaf((struct lyd_node_leaf_list *)dnode, value); | |
511 | } | |
512 | ||
513 | void yang_dnode_set_entry(const struct lyd_node *dnode, void *entry) | |
514 | { | |
db452508 | 515 | assert(CHECK_FLAG(dnode->schema->nodetype, LYS_LIST | LYS_CONTAINER)); |
1c2facd1 RW |
516 | lyd_set_private(dnode, entry); |
517 | } | |
518 | ||
25c780a3 RW |
519 | void *yang_dnode_get_entry(const struct lyd_node *dnode, |
520 | bool abort_if_not_found) | |
1c2facd1 RW |
521 | { |
522 | const struct lyd_node *orig_dnode = dnode; | |
523 | char xpath[XPATH_MAXLEN]; | |
524 | ||
525 | while (dnode) { | |
526 | switch (dnode->schema->nodetype) { | |
527 | case LYS_CONTAINER: | |
528 | case LYS_LIST: | |
529 | if (dnode->priv) | |
530 | return dnode->priv; | |
531 | break; | |
532 | default: | |
533 | break; | |
534 | } | |
535 | ||
536 | dnode = dnode->parent; | |
537 | } | |
538 | ||
25c780a3 RW |
539 | if (!abort_if_not_found) |
540 | return NULL; | |
541 | ||
1c2facd1 RW |
542 | yang_dnode_get_path(orig_dnode, xpath, sizeof(xpath)); |
543 | flog_err(EC_LIB_YANG_DNODE_NOT_FOUND, | |
544 | "%s: failed to find entry [xpath %s]", __func__, xpath); | |
545 | zlog_backtrace(LOG_ERR); | |
546 | abort(); | |
547 | } | |
548 | ||
5e02643a | 549 | struct lyd_node *yang_dnode_new(struct ly_ctx *ly_ctx, bool config_only) |
1c2facd1 RW |
550 | { |
551 | struct lyd_node *dnode; | |
5e02643a RW |
552 | int options; |
553 | ||
554 | if (config_only) | |
555 | options = LYD_OPT_CONFIG; | |
556 | else | |
557 | options = LYD_OPT_DATA | LYD_OPT_DATA_NO_YANGLIB; | |
1c2facd1 RW |
558 | |
559 | dnode = NULL; | |
5e02643a | 560 | if (lyd_validate(&dnode, options, ly_ctx) != 0) { |
1c2facd1 RW |
561 | /* Should never happen. */ |
562 | flog_err(EC_LIB_LIBYANG, "%s: lyd_validate() failed", __func__); | |
563 | exit(1); | |
564 | } | |
565 | ||
566 | return dnode; | |
567 | } | |
568 | ||
569 | struct lyd_node *yang_dnode_dup(const struct lyd_node *dnode) | |
570 | { | |
571 | return lyd_dup_withsiblings(dnode, 1); | |
572 | } | |
573 | ||
574 | void yang_dnode_free(struct lyd_node *dnode) | |
575 | { | |
e5dc8a44 RW |
576 | while (dnode->parent) |
577 | dnode = dnode->parent; | |
1c2facd1 RW |
578 | lyd_free_withsiblings(dnode); |
579 | } | |
580 | ||
581 | struct yang_data *yang_data_new(const char *xpath, const char *value) | |
582 | { | |
1c2facd1 RW |
583 | struct yang_data *data; |
584 | ||
1c2facd1 RW |
585 | data = XCALLOC(MTYPE_YANG_DATA, sizeof(*data)); |
586 | strlcpy(data->xpath, xpath, sizeof(data->xpath)); | |
1c2facd1 RW |
587 | if (value) |
588 | data->value = strdup(value); | |
589 | ||
590 | return data; | |
591 | } | |
592 | ||
593 | void yang_data_free(struct yang_data *data) | |
594 | { | |
595 | if (data->value) | |
596 | free(data->value); | |
597 | XFREE(MTYPE_YANG_DATA, data); | |
598 | } | |
599 | ||
600 | struct list *yang_data_list_new(void) | |
601 | { | |
602 | struct list *list; | |
603 | ||
604 | list = list_new(); | |
605 | list->del = (void (*)(void *))yang_data_free; | |
606 | ||
607 | return list; | |
608 | } | |
609 | ||
610 | static void *ly_dup_cb(const void *priv) | |
611 | { | |
612 | /* Make a shallow copy of the priv pointer. */ | |
613 | return (void *)priv; | |
614 | } | |
615 | ||
616 | /* Make libyang log its errors using FRR logging infrastructure. */ | |
617 | static void ly_log_cb(LY_LOG_LEVEL level, const char *msg, const char *path) | |
618 | { | |
619 | int priority; | |
620 | ||
621 | switch (level) { | |
622 | case LY_LLERR: | |
623 | priority = LOG_ERR; | |
624 | break; | |
625 | case LY_LLWRN: | |
626 | priority = LOG_WARNING; | |
627 | break; | |
628 | case LY_LLVRB: | |
629 | priority = LOG_DEBUG; | |
630 | break; | |
631 | default: | |
632 | return; | |
633 | } | |
634 | ||
635 | if (path) | |
636 | zlog(priority, "libyang: %s (%s)", msg, path); | |
637 | else | |
638 | zlog(priority, "libyang: %s", msg); | |
639 | } | |
640 | ||
641 | void yang_init(void) | |
642 | { | |
643 | static char ly_plugin_dir[PATH_MAX]; | |
644 | const char *const *ly_loaded_plugins; | |
645 | const char *ly_plugin; | |
646 | bool found_ly_frr_types = false; | |
647 | ||
648 | /* Tell libyang where to find its plugins. */ | |
649 | snprintf(ly_plugin_dir, sizeof(ly_plugin_dir), "%s=%s", | |
650 | "LIBYANG_USER_TYPES_PLUGINS_DIR", LIBYANG_PLUGINS_PATH); | |
651 | putenv(ly_plugin_dir); | |
652 | ||
653 | /* Initialize libyang global parameters that affect all containers. */ | |
654 | ly_set_log_clb(ly_log_cb, 1); | |
655 | ly_log_options(LY_LOLOG | LY_LOSTORE); | |
656 | ||
657 | /* Initialize libyang container for native models. */ | |
f3e5b71c RW |
658 | ly_native_ctx = |
659 | ly_ctx_new(YANG_MODELS_PATH, LY_CTX_DISABLE_SEARCHDIR_CWD); | |
1c2facd1 RW |
660 | if (!ly_native_ctx) { |
661 | flog_err(EC_LIB_LIBYANG, "%s: ly_ctx_new() failed", __func__); | |
662 | exit(1); | |
663 | } | |
3a11599c | 664 | ly_ctx_set_module_imp_clb(ly_native_ctx, yang_module_imp_clb, NULL); |
1c2facd1 RW |
665 | ly_ctx_set_priv_dup_clb(ly_native_ctx, ly_dup_cb); |
666 | ||
667 | /* Detect if the required libyang plugin(s) were loaded successfully. */ | |
668 | ly_loaded_plugins = ly_get_loaded_plugins(); | |
669 | for (size_t i = 0; (ly_plugin = ly_loaded_plugins[i]); i++) { | |
670 | if (strmatch(ly_plugin, "frr_user_types")) { | |
671 | found_ly_frr_types = true; | |
672 | break; | |
673 | } | |
674 | } | |
675 | if (!found_ly_frr_types) { | |
676 | flog_err(EC_LIB_LIBYANG_PLUGIN_LOAD, | |
677 | "%s: failed to load frr_user_types.so", __func__); | |
678 | exit(1); | |
679 | } | |
680 | ||
681 | yang_translator_init(); | |
682 | } | |
683 | ||
684 | void yang_terminate(void) | |
685 | { | |
686 | struct yang_module *module; | |
687 | ||
688 | yang_translator_terminate(); | |
689 | ||
690 | while (!RB_EMPTY(yang_modules, &yang_modules)) { | |
691 | module = RB_ROOT(yang_modules, &yang_modules); | |
692 | ||
693 | /* | |
694 | * We shouldn't call ly_ctx_remove_module() here because this | |
695 | * function also removes other modules that depend on it. | |
696 | * | |
697 | * ly_ctx_destroy() will release all memory for us. | |
698 | */ | |
699 | RB_REMOVE(yang_modules, &yang_modules, module); | |
700 | XFREE(MTYPE_YANG_MODULE, module); | |
701 | } | |
702 | ||
703 | ly_ctx_destroy(ly_native_ctx, NULL); | |
704 | } |