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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" | |
1c2facd1 RW |
23 | #include "lib_errors.h" |
24 | #include "yang.h" | |
25 | #include "yang_translator.h" | |
26 | #include "northbound.h" | |
27 | ||
bf8d3d6a DL |
28 | DEFINE_MTYPE_STATIC(LIB, YANG_MODULE, "YANG module"); |
29 | DEFINE_MTYPE_STATIC(LIB, YANG_DATA, "YANG data structure"); | |
1c2facd1 RW |
30 | |
31 | /* libyang container. */ | |
32 | struct ly_ctx *ly_native_ctx; | |
33 | ||
3a11599c DL |
34 | static struct yang_module_embed *embeds, **embedupd = &embeds; |
35 | ||
36 | void yang_module_embed(struct yang_module_embed *embed) | |
37 | { | |
38 | embed->next = NULL; | |
39 | *embedupd = embed; | |
40 | embedupd = &embed->next; | |
41 | } | |
42 | ||
3bb513c3 CH |
43 | static LY_ERR yang_module_imp_clb(const char *mod_name, const char *mod_rev, |
44 | const char *submod_name, | |
45 | const char *submod_rev, void *user_data, | |
46 | LYS_INFORMAT *format, | |
47 | const char **module_data, | |
48 | void (**free_module_data)(void *, void *)) | |
3a11599c DL |
49 | { |
50 | struct yang_module_embed *e; | |
51 | ||
3a11599c | 52 | for (e = embeds; e; e = e->next) { |
65de8bc8 | 53 | if (e->sub_mod_name && submod_name) { |
54 | if (strcmp(e->sub_mod_name, submod_name)) | |
55 | continue; | |
56 | ||
57 | if (submod_rev && strcmp(e->sub_mod_rev, submod_rev)) | |
58 | continue; | |
59 | } else { | |
60 | if (strcmp(e->mod_name, mod_name)) | |
61 | continue; | |
62 | ||
63 | if (mod_rev && strcmp(e->mod_rev, mod_rev)) | |
64 | continue; | |
65 | } | |
3a11599c DL |
66 | |
67 | *format = e->format; | |
3bb513c3 CH |
68 | *module_data = e->data; |
69 | return LY_SUCCESS; | |
3a11599c DL |
70 | } |
71 | ||
3bb513c3 CH |
72 | /* We get here for indirect modules like ietf-inet-types */ |
73 | zlog_debug( | |
65de8bc8 | 74 | "YANG model \"%s@%s\" \"%s@%s\"not embedded, trying external file", |
75 | mod_name, mod_rev ? mod_rev : "*", | |
76 | submod_name ? submod_name : "*", submod_rev ? submod_rev : "*"); | |
3bb513c3 CH |
77 | |
78 | return LY_ENOTFOUND; | |
3a11599c DL |
79 | } |
80 | ||
40664f16 | 81 | /* clang-format off */ |
96f2c009 | 82 | static const char *const frr_native_modules[] = { |
a1b5f469 | 83 | "frr-interface", |
bc867a5d | 84 | "frr-vrf", |
6a7fb29c CS |
85 | "frr-routing", |
86 | "frr-route-map", | |
87 | "frr-nexthop", | |
a1b5f469 | 88 | "frr-ripd", |
e9ce224b | 89 | "frr-ripngd", |
96f2c009 | 90 | "frr-isisd", |
f495425b | 91 | "frr-vrrpd", |
0d2e2bd1 | 92 | "frr-zebra", |
4d7b695d | 93 | "frr-pathd", |
a1b5f469 | 94 | }; |
40664f16 | 95 | /* clang-format on */ |
a1b5f469 | 96 | |
1c2facd1 RW |
97 | /* Generate the yang_modules tree. */ |
98 | static inline int yang_module_compare(const struct yang_module *a, | |
99 | const struct yang_module *b) | |
100 | { | |
101 | return strcmp(a->name, b->name); | |
102 | } | |
103 | RB_GENERATE(yang_modules, yang_module, entry, yang_module_compare) | |
104 | ||
105 | struct yang_modules yang_modules = RB_INITIALIZER(&yang_modules); | |
106 | ||
107 | struct yang_module *yang_module_load(const char *module_name) | |
108 | { | |
109 | struct yang_module *module; | |
110 | const struct lys_module *module_info; | |
111 | ||
3bb513c3 CH |
112 | module_info = |
113 | ly_ctx_load_module(ly_native_ctx, module_name, NULL, NULL); | |
1c2facd1 RW |
114 | if (!module_info) { |
115 | flog_err(EC_LIB_YANG_MODULE_LOAD, | |
116 | "%s: failed to load data model: %s", __func__, | |
117 | module_name); | |
118 | exit(1); | |
119 | } | |
120 | ||
121 | module = XCALLOC(MTYPE_YANG_MODULE, sizeof(*module)); | |
122 | module->name = module_name; | |
123 | module->info = module_info; | |
124 | ||
125 | if (RB_INSERT(yang_modules, &yang_modules, module) != NULL) { | |
126 | flog_err(EC_LIB_YANG_MODULE_LOADED_ALREADY, | |
127 | "%s: YANG module is loaded already: %s", __func__, | |
128 | module_name); | |
129 | exit(1); | |
130 | } | |
131 | ||
132 | return module; | |
133 | } | |
134 | ||
a1b5f469 RW |
135 | void yang_module_load_all(void) |
136 | { | |
137 | for (size_t i = 0; i < array_size(frr_native_modules); i++) | |
138 | yang_module_load(frr_native_modules[i]); | |
139 | } | |
140 | ||
1c2facd1 RW |
141 | struct yang_module *yang_module_find(const char *module_name) |
142 | { | |
143 | struct yang_module s; | |
144 | ||
145 | s.name = module_name; | |
146 | return RB_FIND(yang_modules, &yang_modules, &s); | |
147 | } | |
148 | ||
3bb513c3 | 149 | int yang_snodes_iterate_subtree(const struct lysc_node *snode, |
8a923b48 | 150 | const struct lys_module *module, |
e0ccfad2 | 151 | yang_iterate_cb cb, uint16_t flags, void *arg) |
1c2facd1 | 152 | { |
3bb513c3 | 153 | const struct lysc_node *child; |
e0ccfad2 | 154 | int ret = YANG_ITER_CONTINUE; |
1c2facd1 | 155 | |
8a923b48 RW |
156 | if (module && snode->module != module) |
157 | goto next; | |
158 | ||
1c2facd1 RW |
159 | switch (snode->nodetype) { |
160 | case LYS_CONTAINER: | |
161 | if (CHECK_FLAG(flags, YANG_ITER_FILTER_NPCONTAINERS)) { | |
3bb513c3 | 162 | if (!CHECK_FLAG(snode->flags, LYS_PRESENCE)) |
1c2facd1 RW |
163 | goto next; |
164 | } | |
165 | break; | |
166 | case LYS_LEAF: | |
167 | if (CHECK_FLAG(flags, YANG_ITER_FILTER_LIST_KEYS)) { | |
1c2facd1 | 168 | /* Ignore list keys. */ |
3bb513c3 | 169 | if (lysc_is_key(snode)) |
1c2facd1 RW |
170 | goto next; |
171 | } | |
172 | break; | |
1c2facd1 RW |
173 | case LYS_INPUT: |
174 | case LYS_OUTPUT: | |
175 | if (CHECK_FLAG(flags, YANG_ITER_FILTER_INPUT_OUTPUT)) | |
176 | goto next; | |
177 | break; | |
178 | default: | |
3bb513c3 CH |
179 | assert(snode->nodetype != LYS_AUGMENT |
180 | && snode->nodetype != LYS_GROUPING | |
181 | && snode->nodetype != LYS_USES); | |
1c2facd1 RW |
182 | break; |
183 | } | |
184 | ||
e0ccfad2 RW |
185 | ret = (*cb)(snode, arg); |
186 | if (ret == YANG_ITER_STOP) | |
187 | return ret; | |
1c2facd1 RW |
188 | |
189 | next: | |
190 | /* | |
3bb513c3 | 191 | * YANG leafs and leaf-lists can't have child nodes. |
1c2facd1 | 192 | */ |
db452508 | 193 | if (CHECK_FLAG(snode->nodetype, LYS_LEAF | LYS_LEAFLIST)) |
e0ccfad2 | 194 | return YANG_ITER_CONTINUE; |
1c2facd1 | 195 | |
3bb513c3 | 196 | LY_LIST_FOR (lysc_node_child(snode), child) { |
8a923b48 RW |
197 | ret = yang_snodes_iterate_subtree(child, module, cb, flags, |
198 | arg); | |
e0ccfad2 RW |
199 | if (ret == YANG_ITER_STOP) |
200 | return ret; | |
1c2facd1 | 201 | } |
e0ccfad2 | 202 | return ret; |
1c2facd1 RW |
203 | } |
204 | ||
8d869d37 RW |
205 | int yang_snodes_iterate(const struct lys_module *module, yang_iterate_cb cb, |
206 | uint16_t flags, void *arg) | |
1c2facd1 | 207 | { |
9bde0b25 RW |
208 | const struct lys_module *module_iter; |
209 | uint32_t idx = 0; | |
e0ccfad2 | 210 | int ret = YANG_ITER_CONTINUE; |
1c2facd1 | 211 | |
9bde0b25 RW |
212 | idx = ly_ctx_internal_modules_count(ly_native_ctx); |
213 | while ((module_iter = ly_ctx_get_module_iter(ly_native_ctx, &idx))) { | |
3bb513c3 | 214 | struct lysc_node *snode; |
1c2facd1 | 215 | |
9bde0b25 RW |
216 | if (!module_iter->implemented) |
217 | continue; | |
218 | ||
3bb513c3 CH |
219 | LY_LIST_FOR (module_iter->compiled->data, snode) { |
220 | ret = yang_snodes_iterate_subtree(snode, module, cb, | |
221 | flags, arg); | |
222 | if (ret == YANG_ITER_STOP) | |
223 | return ret; | |
224 | } | |
225 | LY_LIST_FOR (&module_iter->compiled->rpcs->node, snode) { | |
226 | ret = yang_snodes_iterate_subtree(snode, module, cb, | |
227 | flags, arg); | |
228 | if (ret == YANG_ITER_STOP) | |
229 | return ret; | |
230 | } | |
231 | LY_LIST_FOR (&module_iter->compiled->notifs->node, snode) { | |
9bde0b25 RW |
232 | ret = yang_snodes_iterate_subtree(snode, module, cb, |
233 | flags, arg); | |
234 | if (ret == YANG_ITER_STOP) | |
235 | return ret; | |
236 | } | |
1c2facd1 | 237 | } |
e0ccfad2 RW |
238 | |
239 | return ret; | |
1c2facd1 RW |
240 | } |
241 | ||
3bb513c3 CH |
242 | void yang_snode_get_path(const struct lysc_node *snode, |
243 | enum yang_path_type type, char *xpath, | |
244 | size_t xpath_len) | |
1c2facd1 | 245 | { |
1c2facd1 RW |
246 | switch (type) { |
247 | case YANG_PATH_SCHEMA: | |
3bb513c3 | 248 | (void)lysc_path(snode, LYSC_PATH_LOG, xpath, xpath_len); |
1c2facd1 RW |
249 | break; |
250 | case YANG_PATH_DATA: | |
3bb513c3 | 251 | (void)lysc_path(snode, LYSC_PATH_DATA, xpath, xpath_len); |
1c2facd1 RW |
252 | break; |
253 | default: | |
254 | flog_err(EC_LIB_DEVELOPMENT, "%s: unknown yang path type: %u", | |
255 | __func__, type); | |
256 | exit(1); | |
257 | } | |
1c2facd1 RW |
258 | } |
259 | ||
3bb513c3 | 260 | struct lysc_node *yang_snode_real_parent(const struct lysc_node *snode) |
1c2facd1 | 261 | { |
3bb513c3 | 262 | struct lysc_node *parent = snode->parent; |
1c2facd1 RW |
263 | |
264 | while (parent) { | |
1c2facd1 RW |
265 | switch (parent->nodetype) { |
266 | case LYS_CONTAINER: | |
3bb513c3 | 267 | if (CHECK_FLAG(parent->flags, LYS_PRESENCE)) |
1c2facd1 RW |
268 | return parent; |
269 | break; | |
270 | case LYS_LIST: | |
271 | return parent; | |
272 | default: | |
273 | break; | |
274 | } | |
275 | parent = parent->parent; | |
276 | } | |
277 | ||
278 | return NULL; | |
279 | } | |
280 | ||
3bb513c3 | 281 | struct lysc_node *yang_snode_parent_list(const struct lysc_node *snode) |
1c2facd1 | 282 | { |
3bb513c3 | 283 | struct lysc_node *parent = snode->parent; |
1c2facd1 RW |
284 | |
285 | while (parent) { | |
286 | switch (parent->nodetype) { | |
287 | case LYS_LIST: | |
288 | return parent; | |
289 | default: | |
290 | break; | |
291 | } | |
292 | parent = parent->parent; | |
293 | } | |
294 | ||
295 | return NULL; | |
296 | } | |
297 | ||
3bb513c3 | 298 | bool yang_snode_is_typeless_data(const struct lysc_node *snode) |
1c2facd1 | 299 | { |
3bb513c3 | 300 | const struct lysc_node_leaf *sleaf; |
1c2facd1 RW |
301 | |
302 | switch (snode->nodetype) { | |
303 | case LYS_LEAF: | |
3bb513c3 CH |
304 | sleaf = (struct lysc_node_leaf *)snode; |
305 | if (sleaf->type->basetype == LY_TYPE_EMPTY) | |
1c2facd1 RW |
306 | return true; |
307 | return false; | |
308 | case LYS_LEAFLIST: | |
309 | return false; | |
310 | default: | |
311 | return true; | |
312 | } | |
313 | } | |
314 | ||
3bb513c3 | 315 | const char *yang_snode_get_default(const struct lysc_node *snode) |
1c2facd1 | 316 | { |
3bb513c3 | 317 | const struct lysc_node_leaf *sleaf; |
1c2facd1 RW |
318 | |
319 | switch (snode->nodetype) { | |
320 | case LYS_LEAF: | |
3bb513c3 CH |
321 | sleaf = (const struct lysc_node_leaf *)snode; |
322 | return sleaf->dflt ? lyd_value_get_canonical(sleaf->module->ctx, | |
323 | sleaf->dflt) | |
324 | : NULL; | |
1c2facd1 RW |
325 | case LYS_LEAFLIST: |
326 | /* TODO: check leaf-list default values */ | |
327 | return NULL; | |
328 | default: | |
329 | return NULL; | |
330 | } | |
331 | } | |
332 | ||
3bb513c3 | 333 | const struct lysc_type *yang_snode_get_type(const struct lysc_node *snode) |
1c2facd1 | 334 | { |
3bb513c3 CH |
335 | struct lysc_node_leaf *sleaf = (struct lysc_node_leaf *)snode; |
336 | struct lysc_type *type; | |
1c2facd1 | 337 | |
db452508 | 338 | if (!CHECK_FLAG(sleaf->nodetype, LYS_LEAF | LYS_LEAFLIST)) |
1c2facd1 RW |
339 | return NULL; |
340 | ||
3bb513c3 CH |
341 | type = sleaf->type; |
342 | while (type->basetype == LY_TYPE_LEAFREF) | |
343 | type = ((struct lysc_type_leafref *)type)->realtype; | |
1c2facd1 RW |
344 | |
345 | return type; | |
346 | } | |
347 | ||
3bb513c3 CH |
348 | unsigned int yang_snode_num_keys(const struct lysc_node *snode) |
349 | { | |
350 | const struct lysc_node_leaf *skey; | |
351 | uint count = 0; | |
352 | ||
353 | if (!CHECK_FLAG(snode->nodetype, LYS_LIST)) | |
354 | return 0; | |
355 | ||
356 | /* Walk list of children */ | |
357 | LY_FOR_KEYS (snode, skey) { | |
358 | count++; | |
359 | } | |
360 | return count; | |
361 | } | |
362 | ||
1c2facd1 RW |
363 | void yang_dnode_get_path(const struct lyd_node *dnode, char *xpath, |
364 | size_t xpath_len) | |
365 | { | |
3bb513c3 | 366 | lyd_path(dnode, LYD_PATH_STD, xpath, xpath_len); |
1c2facd1 RW |
367 | } |
368 | ||
3f662078 RW |
369 | const char *yang_dnode_get_schema_name(const struct lyd_node *dnode, |
370 | const char *xpath_fmt, ...) | |
371 | { | |
372 | if (xpath_fmt) { | |
373 | va_list ap; | |
374 | char xpath[XPATH_MAXLEN]; | |
375 | ||
376 | va_start(ap, xpath_fmt); | |
377 | vsnprintf(xpath, sizeof(xpath), xpath_fmt, ap); | |
378 | va_end(ap); | |
379 | ||
380 | dnode = yang_dnode_get(dnode, xpath); | |
381 | if (!dnode) { | |
382 | flog_err(EC_LIB_YANG_DNODE_NOT_FOUND, | |
383 | "%s: couldn't find %s", __func__, xpath); | |
384 | zlog_backtrace(LOG_ERR); | |
385 | abort(); | |
386 | } | |
387 | } | |
388 | ||
389 | return dnode->schema->name; | |
390 | } | |
391 | ||
3bb513c3 | 392 | struct lyd_node *yang_dnode_get(const struct lyd_node *dnode, const char *xpath) |
1c2facd1 | 393 | { |
3bb513c3 | 394 | struct ly_set *set = NULL; |
1c2facd1 RW |
395 | struct lyd_node *dnode_ret = NULL; |
396 | ||
3bb513c3 CH |
397 | /* |
398 | * XXX a lot of the code uses this for style I guess. It shouldn't, as | |
399 | * it adds to the xpath parsing complexity in libyang. | |
400 | */ | |
401 | if (xpath[0] == '.' && xpath[1] == '/') | |
402 | xpath += 2; | |
1c2facd1 | 403 | |
3bb513c3 CH |
404 | if (lyd_find_xpath(dnode, xpath, &set)) { |
405 | assert(0); /* XXX replicates old libyang1 base code */ | |
406 | goto exit; | |
407 | } | |
408 | if (set->count == 0) | |
1c2facd1 RW |
409 | goto exit; |
410 | ||
3bb513c3 | 411 | if (set->count > 1) { |
1c2facd1 RW |
412 | flog_warn(EC_LIB_YANG_DNODE_NOT_FOUND, |
413 | "%s: found %u elements (expected 0 or 1) [xpath %s]", | |
3bb513c3 | 414 | __func__, set->count, xpath); |
1c2facd1 RW |
415 | goto exit; |
416 | } | |
417 | ||
3bb513c3 | 418 | dnode_ret = set->dnodes[0]; |
1c2facd1 RW |
419 | |
420 | exit: | |
3bb513c3 | 421 | ly_set_free(set, NULL); |
1c2facd1 RW |
422 | |
423 | return dnode_ret; | |
424 | } | |
425 | ||
3bb513c3 CH |
426 | struct lyd_node *yang_dnode_getf(const struct lyd_node *dnode, |
427 | const char *xpath_fmt, ...) | |
1c2facd1 RW |
428 | { |
429 | va_list ap; | |
430 | char xpath[XPATH_MAXLEN]; | |
1c2facd1 RW |
431 | |
432 | va_start(ap, xpath_fmt); | |
433 | vsnprintf(xpath, sizeof(xpath), xpath_fmt, ap); | |
434 | va_end(ap); | |
435 | ||
3bb513c3 CH |
436 | return yang_dnode_get(dnode, xpath); |
437 | } | |
438 | ||
439 | bool yang_dnode_exists(const struct lyd_node *dnode, const char *xpath) | |
440 | { | |
441 | struct ly_set *set = NULL; | |
442 | bool exists = false; | |
1c2facd1 | 443 | |
3bb513c3 CH |
444 | if (xpath[0] == '.' && xpath[1] == '/') |
445 | xpath += 2; | |
446 | if (lyd_find_xpath(dnode, xpath, &set)) | |
447 | return false; | |
448 | exists = set->count > 0; | |
449 | ly_set_free(set, NULL); | |
450 | return exists; | |
451 | } | |
452 | ||
453 | bool yang_dnode_existsf(const struct lyd_node *dnode, const char *xpath_fmt, | |
454 | ...) | |
455 | { | |
456 | va_list ap; | |
457 | char xpath[XPATH_MAXLEN]; | |
458 | ||
459 | va_start(ap, xpath_fmt); | |
460 | vsnprintf(xpath, sizeof(xpath), xpath_fmt, ap); | |
461 | va_end(ap); | |
462 | ||
463 | return yang_dnode_exists(dnode, xpath); | |
1c2facd1 RW |
464 | } |
465 | ||
7b611145 RW |
466 | void yang_dnode_iterate(yang_dnode_iter_cb cb, void *arg, |
467 | const struct lyd_node *dnode, const char *xpath_fmt, | |
468 | ...) | |
469 | { | |
470 | va_list ap; | |
471 | char xpath[XPATH_MAXLEN]; | |
472 | struct ly_set *set; | |
473 | ||
474 | va_start(ap, xpath_fmt); | |
475 | vsnprintf(xpath, sizeof(xpath), xpath_fmt, ap); | |
476 | va_end(ap); | |
477 | ||
3bb513c3 CH |
478 | if (lyd_find_xpath(dnode, xpath, &set)) { |
479 | assert(0); /* XXX libyang2: ly1 code asserted success */ | |
480 | return; | |
481 | } | |
482 | for (unsigned int i = 0; i < set->count; i++) { | |
7b611145 RW |
483 | int ret; |
484 | ||
3bb513c3 | 485 | ret = (*cb)(set->dnodes[i], arg); |
7b611145 | 486 | if (ret == YANG_ITER_STOP) |
4e32d023 | 487 | break; |
7b611145 RW |
488 | } |
489 | ||
3bb513c3 | 490 | ly_set_free(set, NULL); |
7b611145 RW |
491 | } |
492 | ||
3bb513c3 | 493 | bool yang_dnode_is_default(const struct lyd_node *dnode, const char *xpath) |
1c2facd1 | 494 | { |
3bb513c3 CH |
495 | const struct lysc_node *snode; |
496 | struct lysc_node_leaf *sleaf; | |
1c2facd1 | 497 | |
3bb513c3 | 498 | if (xpath) |
1c2facd1 | 499 | dnode = yang_dnode_get(dnode, xpath); |
1c2facd1 RW |
500 | |
501 | assert(dnode); | |
502 | snode = dnode->schema; | |
503 | switch (snode->nodetype) { | |
504 | case LYS_LEAF: | |
3bb513c3 CH |
505 | sleaf = (struct lysc_node_leaf *)snode; |
506 | if (sleaf->type->basetype == LY_TYPE_EMPTY) | |
1c2facd1 | 507 | return false; |
3bb513c3 | 508 | return lyd_is_default(dnode); |
1c2facd1 RW |
509 | case LYS_LEAFLIST: |
510 | /* TODO: check leaf-list default values */ | |
511 | return false; | |
512 | case LYS_CONTAINER: | |
3bb513c3 | 513 | if (CHECK_FLAG(snode->flags, LYS_PRESENCE)) |
1c2facd1 RW |
514 | return false; |
515 | return true; | |
516 | default: | |
517 | return false; | |
518 | } | |
519 | } | |
520 | ||
3bb513c3 CH |
521 | bool yang_dnode_is_defaultf(const struct lyd_node *dnode, const char *xpath_fmt, |
522 | ...) | |
1c2facd1 | 523 | { |
3bb513c3 | 524 | if (!xpath_fmt) |
1c2facd1 | 525 | return yang_dnode_is_default(dnode, NULL); |
3bb513c3 CH |
526 | else { |
527 | va_list ap; | |
528 | char xpath[XPATH_MAXLEN]; | |
529 | ||
530 | va_start(ap, xpath_fmt); | |
531 | vsnprintf(xpath, sizeof(xpath), xpath_fmt, ap); | |
532 | va_end(ap); | |
533 | ||
534 | return yang_dnode_is_default(dnode, xpath); | |
535 | } | |
536 | } | |
537 | ||
538 | bool yang_dnode_is_default_recursive(const struct lyd_node *dnode) | |
539 | { | |
540 | struct lyd_node *root, *dnode_iter; | |
1c2facd1 RW |
541 | |
542 | if (!yang_dnode_is_default(dnode, NULL)) | |
543 | return false; | |
544 | ||
3bb513c3 CH |
545 | if (CHECK_FLAG(dnode->schema->nodetype, LYS_LEAF | LYS_LEAFLIST)) |
546 | return true; | |
547 | ||
548 | LY_LIST_FOR (lyd_child(dnode), root) { | |
549 | LYD_TREE_DFS_BEGIN (root, dnode_iter) { | |
1c2facd1 RW |
550 | if (!yang_dnode_is_default(dnode_iter, NULL)) |
551 | return false; | |
552 | ||
3bb513c3 | 553 | LYD_TREE_DFS_END(root, dnode_iter); |
1c2facd1 RW |
554 | } |
555 | } | |
556 | ||
557 | return true; | |
558 | } | |
559 | ||
560 | void yang_dnode_change_leaf(struct lyd_node *dnode, const char *value) | |
561 | { | |
562 | assert(dnode->schema->nodetype == LYS_LEAF); | |
3bb513c3 | 563 | lyd_change_term(dnode, value); |
1c2facd1 RW |
564 | } |
565 | ||
5e02643a | 566 | struct lyd_node *yang_dnode_new(struct ly_ctx *ly_ctx, bool config_only) |
1c2facd1 | 567 | { |
3bb513c3 CH |
568 | struct lyd_node *dnode = NULL; |
569 | int options = config_only ? LYD_VALIDATE_NO_STATE : 0; | |
1c2facd1 | 570 | |
3bb513c3 | 571 | if (lyd_validate_all(&dnode, ly_ctx, options, NULL) != 0) { |
1c2facd1 RW |
572 | /* Should never happen. */ |
573 | flog_err(EC_LIB_LIBYANG, "%s: lyd_validate() failed", __func__); | |
574 | exit(1); | |
575 | } | |
576 | ||
577 | return dnode; | |
578 | } | |
579 | ||
580 | struct lyd_node *yang_dnode_dup(const struct lyd_node *dnode) | |
581 | { | |
3bb513c3 CH |
582 | struct lyd_node *dup = NULL; |
583 | LY_ERR err; | |
584 | err = lyd_dup_siblings(dnode, NULL, LYD_DUP_RECURSIVE, &dup); | |
585 | assert(!err); | |
586 | return dup; | |
1c2facd1 RW |
587 | } |
588 | ||
589 | void yang_dnode_free(struct lyd_node *dnode) | |
590 | { | |
e5dc8a44 | 591 | while (dnode->parent) |
3bb513c3 CH |
592 | dnode = lyd_parent(dnode); |
593 | lyd_free_all(dnode); | |
1c2facd1 RW |
594 | } |
595 | ||
596 | struct yang_data *yang_data_new(const char *xpath, const char *value) | |
597 | { | |
1c2facd1 RW |
598 | struct yang_data *data; |
599 | ||
1c2facd1 RW |
600 | data = XCALLOC(MTYPE_YANG_DATA, sizeof(*data)); |
601 | strlcpy(data->xpath, xpath, sizeof(data->xpath)); | |
1c2facd1 RW |
602 | if (value) |
603 | data->value = strdup(value); | |
604 | ||
605 | return data; | |
606 | } | |
607 | ||
608 | void yang_data_free(struct yang_data *data) | |
609 | { | |
610 | if (data->value) | |
611 | free(data->value); | |
612 | XFREE(MTYPE_YANG_DATA, data); | |
613 | } | |
614 | ||
615 | struct list *yang_data_list_new(void) | |
616 | { | |
617 | struct list *list; | |
618 | ||
619 | list = list_new(); | |
620 | list->del = (void (*)(void *))yang_data_free; | |
621 | ||
622 | return list; | |
623 | } | |
624 | ||
fcb7bffd RW |
625 | struct yang_data *yang_data_list_find(const struct list *list, |
626 | const char *xpath_fmt, ...) | |
627 | { | |
628 | char xpath[XPATH_MAXLEN]; | |
629 | struct yang_data *data; | |
630 | struct listnode *node; | |
631 | va_list ap; | |
632 | ||
633 | va_start(ap, xpath_fmt); | |
634 | vsnprintf(xpath, sizeof(xpath), xpath_fmt, ap); | |
635 | va_end(ap); | |
636 | ||
637 | for (ALL_LIST_ELEMENTS_RO(list, node, data)) | |
638 | if (strmatch(data->xpath, xpath)) | |
639 | return data; | |
640 | ||
641 | return NULL; | |
642 | } | |
643 | ||
1c2facd1 RW |
644 | /* Make libyang log its errors using FRR logging infrastructure. */ |
645 | static void ly_log_cb(LY_LOG_LEVEL level, const char *msg, const char *path) | |
646 | { | |
96679938 | 647 | int priority = LOG_ERR; |
1c2facd1 RW |
648 | |
649 | switch (level) { | |
650 | case LY_LLERR: | |
651 | priority = LOG_ERR; | |
652 | break; | |
653 | case LY_LLWRN: | |
654 | priority = LOG_WARNING; | |
655 | break; | |
656 | case LY_LLVRB: | |
96679938 | 657 | case LY_LLDBG: |
1c2facd1 RW |
658 | priority = LOG_DEBUG; |
659 | break; | |
1c2facd1 RW |
660 | } |
661 | ||
662 | if (path) | |
663 | zlog(priority, "libyang: %s (%s)", msg, path); | |
664 | else | |
665 | zlog(priority, "libyang: %s", msg); | |
666 | } | |
667 | ||
df5eda3d RW |
668 | const char *yang_print_errors(struct ly_ctx *ly_ctx, char *buf, size_t buf_len) |
669 | { | |
670 | struct ly_err_item *ei; | |
671 | const char *path; | |
672 | ||
673 | ei = ly_err_first(ly_ctx); | |
674 | if (!ei) | |
675 | return ""; | |
676 | ||
677 | strlcpy(buf, "YANG error(s):\n", buf_len); | |
678 | for (; ei; ei = ei->next) { | |
679 | strlcat(buf, " ", buf_len); | |
680 | strlcat(buf, ei->msg, buf_len); | |
681 | strlcat(buf, "\n", buf_len); | |
682 | } | |
683 | ||
684 | path = ly_errpath(ly_ctx); | |
685 | if (path) { | |
686 | strlcat(buf, " YANG path: ", buf_len); | |
687 | strlcat(buf, path, buf_len); | |
688 | strlcat(buf, "\n", buf_len); | |
689 | } | |
690 | ||
691 | ly_err_clean(ly_ctx, NULL); | |
692 | ||
693 | return buf; | |
694 | } | |
695 | ||
62ae9ade RW |
696 | void yang_debugging_set(bool enable) |
697 | { | |
698 | if (enable) { | |
3bb513c3 CH |
699 | ly_log_level(LY_LLDBG); |
700 | ly_log_dbg_groups(0xFF); | |
62ae9ade | 701 | } else { |
3bb513c3 CH |
702 | ly_log_level(LY_LLERR); |
703 | ly_log_dbg_groups(0); | |
62ae9ade RW |
704 | } |
705 | } | |
706 | ||
3bb513c3 | 707 | struct ly_ctx *yang_ctx_new_setup(bool embedded_modules, bool explicit_compile) |
591f57cf | 708 | { |
3bb513c3 | 709 | struct ly_ctx *ctx = NULL; |
591f57cf | 710 | const char *yang_models_path = YANG_MODELS_PATH; |
3bb513c3 | 711 | LY_ERR err; |
591f57cf DL |
712 | |
713 | if (access(yang_models_path, R_OK | X_OK)) { | |
714 | yang_models_path = NULL; | |
715 | if (errno == ENOENT) | |
716 | zlog_info("yang model directory \"%s\" does not exist", | |
717 | YANG_MODELS_PATH); | |
718 | else | |
719 | flog_err_sys(EC_LIB_LIBYANG, | |
720 | "cannot access yang model directory \"%s\"", | |
721 | YANG_MODELS_PATH); | |
722 | } | |
723 | ||
3bb513c3 CH |
724 | uint options = LY_CTX_NO_YANGLIBRARY | LY_CTX_DISABLE_SEARCHDIR_CWD; |
725 | if (explicit_compile) | |
726 | options |= LY_CTX_EXPLICIT_COMPILE; | |
727 | err = ly_ctx_new(yang_models_path, options, &ctx); | |
728 | if (err) | |
591f57cf | 729 | return NULL; |
b90204a8 RW |
730 | |
731 | if (embedded_modules) | |
732 | ly_ctx_set_module_imp_clb(ctx, yang_module_imp_clb, NULL); | |
733 | ||
591f57cf DL |
734 | return ctx; |
735 | } | |
736 | ||
3bb513c3 | 737 | void yang_init(bool embedded_modules, bool defer_compile) |
1c2facd1 | 738 | { |
1c2facd1 RW |
739 | /* Initialize libyang global parameters that affect all containers. */ |
740 | ly_set_log_clb(ly_log_cb, 1); | |
741 | ly_log_options(LY_LOLOG | LY_LOSTORE); | |
742 | ||
743 | /* Initialize libyang container for native models. */ | |
3bb513c3 | 744 | ly_native_ctx = yang_ctx_new_setup(embedded_modules, defer_compile); |
1c2facd1 RW |
745 | if (!ly_native_ctx) { |
746 | flog_err(EC_LIB_LIBYANG, "%s: ly_ctx_new() failed", __func__); | |
747 | exit(1); | |
748 | } | |
1c2facd1 | 749 | |
1c2facd1 RW |
750 | yang_translator_init(); |
751 | } | |
752 | ||
3bb513c3 CH |
753 | void yang_init_loading_complete(void) |
754 | { | |
755 | /* Compile everything */ | |
756 | if (ly_ctx_compile(ly_native_ctx) != LY_SUCCESS) { | |
757 | flog_err(EC_LIB_YANG_MODULE_LOAD, | |
758 | "%s: failed to compile loaded modules: %s", __func__, | |
759 | ly_errmsg(ly_native_ctx)); | |
760 | exit(1); | |
761 | } | |
762 | } | |
763 | ||
1c2facd1 RW |
764 | void yang_terminate(void) |
765 | { | |
766 | struct yang_module *module; | |
767 | ||
768 | yang_translator_terminate(); | |
769 | ||
770 | while (!RB_EMPTY(yang_modules, &yang_modules)) { | |
771 | module = RB_ROOT(yang_modules, &yang_modules); | |
772 | ||
773 | /* | |
774 | * We shouldn't call ly_ctx_remove_module() here because this | |
775 | * function also removes other modules that depend on it. | |
776 | * | |
777 | * ly_ctx_destroy() will release all memory for us. | |
778 | */ | |
779 | RB_REMOVE(yang_modules, &yang_modules, module); | |
780 | XFREE(MTYPE_YANG_MODULE, module); | |
781 | } | |
782 | ||
3bb513c3 | 783 | ly_ctx_destroy(ly_native_ctx); |
1c2facd1 | 784 | } |
27802d3f | 785 | |
786 | const struct lyd_node *yang_dnode_get_parent(const struct lyd_node *dnode, | |
787 | const char *name) | |
788 | { | |
789 | const struct lyd_node *orig_dnode = dnode; | |
790 | ||
791 | while (orig_dnode) { | |
792 | switch (orig_dnode->schema->nodetype) { | |
793 | case LYS_LIST: | |
794 | case LYS_CONTAINER: | |
795 | if (!strcmp(orig_dnode->schema->name, name)) | |
796 | return orig_dnode; | |
797 | break; | |
798 | default: | |
799 | break; | |
800 | } | |
801 | ||
3bb513c3 | 802 | orig_dnode = lyd_parent(orig_dnode); |
27802d3f | 803 | } |
804 | ||
805 | return NULL; | |
806 | } | |
807 | ||
cf740d2e | 808 | bool yang_is_last_list_dnode(const struct lyd_node *dnode) |
27802d3f | 809 | { |
810 | return (((dnode->next == NULL) | |
811 | || (dnode->next | |
812 | && (strcmp(dnode->next->schema->name, dnode->schema->name) | |
813 | != 0))) | |
814 | && dnode->prev | |
815 | && ((dnode->prev == dnode) | |
816 | || (strcmp(dnode->prev->schema->name, dnode->schema->name) | |
817 | != 0))); | |
818 | } | |
819 | ||
cf740d2e | 820 | bool yang_is_last_level_dnode(const struct lyd_node *dnode) |
27802d3f | 821 | { |
822 | const struct lyd_node *parent; | |
27802d3f | 823 | const struct lyd_node *key_leaf; |
824 | uint8_t keys_size; | |
825 | ||
826 | switch (dnode->schema->nodetype) { | |
827 | case LYS_LIST: | |
828 | assert(dnode->parent); | |
3bb513c3 CH |
829 | parent = lyd_parent(dnode); |
830 | uint snode_num_keys = yang_snode_num_keys(parent->schema); | |
831 | /* XXX libyang2: q: really don't understand this code. */ | |
27802d3f | 832 | key_leaf = dnode->prev; |
3bb513c3 | 833 | for (keys_size = 1; keys_size < snode_num_keys; keys_size++) |
27802d3f | 834 | key_leaf = key_leaf->prev; |
835 | if (key_leaf->prev == dnode) | |
836 | return true; | |
837 | break; | |
838 | case LYS_CONTAINER: | |
839 | return true; | |
840 | default: | |
841 | break; | |
842 | } | |
843 | ||
844 | return false; | |
845 | } | |
846 | ||
27802d3f | 847 | const struct lyd_node * |
848 | yang_get_subtree_with_no_sibling(const struct lyd_node *dnode) | |
849 | { | |
850 | bool parent = true; | |
851 | const struct lyd_node *node; | |
27802d3f | 852 | |
853 | node = dnode; | |
854 | if (node->schema->nodetype != LYS_LIST) | |
855 | return node; | |
856 | ||
857 | while (parent) { | |
858 | switch (node->schema->nodetype) { | |
859 | case LYS_CONTAINER: | |
3bb513c3 | 860 | if (!CHECK_FLAG(node->schema->flags, LYS_PRESENCE)) { |
27802d3f | 861 | if (node->parent |
862 | && (node->parent->schema->module | |
863 | == dnode->schema->module)) | |
3bb513c3 | 864 | node = lyd_parent(node); |
27802d3f | 865 | else |
866 | parent = false; | |
867 | } else | |
868 | parent = false; | |
869 | break; | |
870 | case LYS_LIST: | |
871 | if (yang_is_last_list_dnode(node) | |
872 | && yang_is_last_level_dnode(node)) { | |
873 | if (node->parent | |
874 | && (node->parent->schema->module | |
875 | == dnode->schema->module)) | |
3bb513c3 | 876 | node = lyd_parent(node); |
27802d3f | 877 | else |
878 | parent = false; | |
879 | } else | |
880 | parent = false; | |
881 | break; | |
882 | default: | |
883 | parent = false; | |
884 | break; | |
885 | } | |
886 | } | |
887 | return node; | |
888 | } | |
889 | ||
890 | uint32_t yang_get_list_pos(const struct lyd_node *node) | |
891 | { | |
892 | return lyd_list_pos(node); | |
893 | } | |
894 | ||
895 | uint32_t yang_get_list_elements_count(const struct lyd_node *node) | |
896 | { | |
897 | unsigned int count; | |
3bb513c3 | 898 | const struct lysc_node *schema; |
27802d3f | 899 | |
900 | if (!node | |
901 | || ((node->schema->nodetype != LYS_LIST) | |
902 | && (node->schema->nodetype != LYS_LEAFLIST))) { | |
903 | return 0; | |
904 | } | |
905 | ||
906 | schema = node->schema; | |
907 | count = 0; | |
908 | do { | |
909 | if (node->schema == schema) | |
910 | ++count; | |
911 | node = node->next; | |
912 | } while (node); | |
913 | return count; | |
914 | } |