1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2018 NetDEF, Inc.
* Renato Westphal
*/
#include <zebra.h>
#include "log.h"
#include "lib_errors.h"
#include "yang.h"
#include "yang_translator.h"
#include "northbound.h"
DEFINE_MTYPE_STATIC(LIB, YANG_MODULE, "YANG module");
DEFINE_MTYPE_STATIC(LIB, YANG_DATA, "YANG data structure");
/* libyang container. */
struct ly_ctx *ly_native_ctx;
static struct yang_module_embed *embeds, **embedupd = &embeds;
void yang_module_embed(struct yang_module_embed *embed)
{
embed->next = NULL;
*embedupd = embed;
embedupd = &embed->next;
}
static LY_ERR yang_module_imp_clb(const char *mod_name, const char *mod_rev,
const char *submod_name,
const char *submod_rev, void *user_data,
LYS_INFORMAT *format,
const char **module_data,
void (**free_module_data)(void *, void *))
{
struct yang_module_embed *e;
if (!strcmp(mod_name, "ietf-inet-types") ||
!strcmp(mod_name, "ietf-yang-types"))
/* libyang has these built in, don't try finding them here */
return LY_ENOTFOUND;
for (e = embeds; e; e = e->next) {
if (e->sub_mod_name && submod_name) {
if (strcmp(e->sub_mod_name, submod_name))
continue;
if (submod_rev && strcmp(e->sub_mod_rev, submod_rev))
continue;
} else {
if (strcmp(e->mod_name, mod_name))
continue;
if (mod_rev && strcmp(e->mod_rev, mod_rev))
continue;
}
*format = e->format;
*module_data = e->data;
return LY_SUCCESS;
}
/* We get here for indirect modules like ietf-inet-types */
zlog_debug(
"YANG model \"%s@%s\" \"%s@%s\"not embedded, trying external file",
mod_name, mod_rev ? mod_rev : "*",
submod_name ? submod_name : "*", submod_rev ? submod_rev : "*");
return LY_ENOTFOUND;
}
/* clang-format off */
static const char *const frr_native_modules[] = {
"frr-interface",
"frr-vrf",
"frr-routing",
"frr-affinity-map",
"frr-route-map",
"frr-nexthop",
"frr-ripd",
"frr-ripngd",
"frr-isisd",
"frr-vrrpd",
"frr-zebra",
"frr-pathd",
};
/* clang-format on */
/* Generate the yang_modules tree. */
static inline int yang_module_compare(const struct yang_module *a,
const struct yang_module *b)
{
return strcmp(a->name, b->name);
}
RB_GENERATE(yang_modules, yang_module, entry, yang_module_compare)
struct yang_modules yang_modules = RB_INITIALIZER(&yang_modules);
struct yang_module *yang_module_load(const char *module_name)
{
struct yang_module *module;
const struct lys_module *module_info;
module_info =
ly_ctx_load_module(ly_native_ctx, module_name, NULL, NULL);
if (!module_info) {
flog_err(EC_LIB_YANG_MODULE_LOAD,
"%s: failed to load data model: %s", __func__,
module_name);
exit(1);
}
module = XCALLOC(MTYPE_YANG_MODULE, sizeof(*module));
module->name = module_name;
module->info = module_info;
if (RB_INSERT(yang_modules, &yang_modules, module) != NULL) {
flog_err(EC_LIB_YANG_MODULE_LOADED_ALREADY,
"%s: YANG module is loaded already: %s", __func__,
module_name);
exit(1);
}
return module;
}
void yang_module_load_all(void)
{
for (size_t i = 0; i < array_size(frr_native_modules); i++)
yang_module_load(frr_native_modules[i]);
}
struct yang_module *yang_module_find(const char *module_name)
{
struct yang_module s;
s.name = module_name;
return RB_FIND(yang_modules, &yang_modules, &s);
}
int yang_snodes_iterate_subtree(const struct lysc_node *snode,
const struct lys_module *module,
yang_iterate_cb cb, uint16_t flags, void *arg)
{
const struct lysc_node *child;
int ret = YANG_ITER_CONTINUE;
if (module && snode->module != module)
goto next;
switch (snode->nodetype) {
case LYS_CONTAINER:
if (CHECK_FLAG(flags, YANG_ITER_FILTER_NPCONTAINERS)) {
if (!CHECK_FLAG(snode->flags, LYS_PRESENCE))
goto next;
}
break;
case LYS_LEAF:
if (CHECK_FLAG(flags, YANG_ITER_FILTER_LIST_KEYS)) {
/* Ignore list keys. */
if (lysc_is_key(snode))
goto next;
}
break;
case LYS_INPUT:
case LYS_OUTPUT:
if (CHECK_FLAG(flags, YANG_ITER_FILTER_INPUT_OUTPUT))
goto next;
break;
default:
assert(snode->nodetype != LYS_AUGMENT
&& snode->nodetype != LYS_GROUPING
&& snode->nodetype != LYS_USES);
break;
}
ret = (*cb)(snode, arg);
if (ret == YANG_ITER_STOP)
return ret;
next:
/*
* YANG leafs and leaf-lists can't have child nodes.
*/
if (CHECK_FLAG(snode->nodetype, LYS_LEAF | LYS_LEAFLIST))
return YANG_ITER_CONTINUE;
LY_LIST_FOR (lysc_node_child(snode), child) {
ret = yang_snodes_iterate_subtree(child, module, cb, flags,
arg);
if (ret == YANG_ITER_STOP)
return ret;
}
return ret;
}
int yang_snodes_iterate(const struct lys_module *module, yang_iterate_cb cb,
uint16_t flags, void *arg)
{
const struct lys_module *module_iter;
uint32_t idx = 0;
int ret = YANG_ITER_CONTINUE;
idx = ly_ctx_internal_modules_count(ly_native_ctx);
while ((module_iter = ly_ctx_get_module_iter(ly_native_ctx, &idx))) {
struct lysc_node *snode;
if (!module_iter->implemented)
continue;
LY_LIST_FOR (module_iter->compiled->data, snode) {
ret = yang_snodes_iterate_subtree(snode, module, cb,
flags, arg);
if (ret == YANG_ITER_STOP)
return ret;
}
LY_LIST_FOR (&module_iter->compiled->rpcs->node, snode) {
ret = yang_snodes_iterate_subtree(snode, module, cb,
flags, arg);
if (ret == YANG_ITER_STOP)
return ret;
}
LY_LIST_FOR (&module_iter->compiled->notifs->node, snode) {
ret = yang_snodes_iterate_subtree(snode, module, cb,
flags, arg);
if (ret == YANG_ITER_STOP)
return ret;
}
}
return ret;
}
void yang_snode_get_path(const struct lysc_node *snode,
enum yang_path_type type, char *xpath,
size_t xpath_len)
{
switch (type) {
case YANG_PATH_SCHEMA:
(void)lysc_path(snode, LYSC_PATH_LOG, xpath, xpath_len);
break;
case YANG_PATH_DATA:
(void)lysc_path(snode, LYSC_PATH_DATA, xpath, xpath_len);
break;
default:
flog_err(EC_LIB_DEVELOPMENT, "%s: unknown yang path type: %u",
__func__, type);
exit(1);
}
}
struct lysc_node *yang_snode_real_parent(const struct lysc_node *snode)
{
struct lysc_node *parent = snode->parent;
while (parent) {
switch (parent->nodetype) {
case LYS_CONTAINER:
if (CHECK_FLAG(parent->flags, LYS_PRESENCE))
return parent;
break;
case LYS_LIST:
return parent;
default:
break;
}
parent = parent->parent;
}
return NULL;
}
struct lysc_node *yang_snode_parent_list(const struct lysc_node *snode)
{
struct lysc_node *parent = snode->parent;
while (parent) {
switch (parent->nodetype) {
case LYS_LIST:
return parent;
default:
break;
}
parent = parent->parent;
}
return NULL;
}
bool yang_snode_is_typeless_data(const struct lysc_node *snode)
{
const struct lysc_node_leaf *sleaf;
switch (snode->nodetype) {
case LYS_LEAF:
sleaf = (struct lysc_node_leaf *)snode;
if (sleaf->type->basetype == LY_TYPE_EMPTY)
return true;
return false;
case LYS_LEAFLIST:
return false;
default:
return true;
}
}
const char *yang_snode_get_default(const struct lysc_node *snode)
{
const struct lysc_node_leaf *sleaf;
switch (snode->nodetype) {
case LYS_LEAF:
sleaf = (const struct lysc_node_leaf *)snode;
return sleaf->dflt ? lyd_value_get_canonical(sleaf->module->ctx,
sleaf->dflt)
: NULL;
case LYS_LEAFLIST:
/* TODO: check leaf-list default values */
return NULL;
default:
return NULL;
}
}
const struct lysc_type *yang_snode_get_type(const struct lysc_node *snode)
{
struct lysc_node_leaf *sleaf = (struct lysc_node_leaf *)snode;
struct lysc_type *type;
if (!CHECK_FLAG(sleaf->nodetype, LYS_LEAF | LYS_LEAFLIST))
return NULL;
type = sleaf->type;
while (type->basetype == LY_TYPE_LEAFREF)
type = ((struct lysc_type_leafref *)type)->realtype;
return type;
}
unsigned int yang_snode_num_keys(const struct lysc_node *snode)
{
const struct lysc_node_leaf *skey;
uint count = 0;
if (!CHECK_FLAG(snode->nodetype, LYS_LIST))
return 0;
/* Walk list of children */
LY_FOR_KEYS (snode, skey) {
count++;
}
return count;
}
void yang_dnode_get_path(const struct lyd_node *dnode, char *xpath,
size_t xpath_len)
{
lyd_path(dnode, LYD_PATH_STD, xpath, xpath_len);
}
const char *yang_dnode_get_schema_name(const struct lyd_node *dnode,
const char *xpath_fmt, ...)
{
if (xpath_fmt) {
va_list ap;
char xpath[XPATH_MAXLEN];
va_start(ap, xpath_fmt);
vsnprintf(xpath, sizeof(xpath), xpath_fmt, ap);
va_end(ap);
dnode = yang_dnode_get(dnode, xpath);
if (!dnode) {
flog_err(EC_LIB_YANG_DNODE_NOT_FOUND,
"%s: couldn't find %s", __func__, xpath);
zlog_backtrace(LOG_ERR);
abort();
}
}
return dnode->schema->name;
}
struct lyd_node *yang_dnode_get(const struct lyd_node *dnode, const char *xpath)
{
struct ly_set *set = NULL;
struct lyd_node *dnode_ret = NULL;
/*
* XXX a lot of the code uses this for style I guess. It shouldn't, as
* it adds to the xpath parsing complexity in libyang.
*/
if (xpath[0] == '.' && xpath[1] == '/')
xpath += 2;
if (lyd_find_xpath(dnode, xpath, &set)) {
/*
* Commenting out the below assert failure as it crashes mgmtd
* when bad xpath is passed.
*
* assert(0); XXX replicates old libyang1 base code
*/
goto exit;
}
if (set->count == 0)
goto exit;
if (set->count > 1) {
flog_warn(EC_LIB_YANG_DNODE_NOT_FOUND,
"%s: found %u elements (expected 0 or 1) [xpath %s]",
__func__, set->count, xpath);
goto exit;
}
dnode_ret = set->dnodes[0];
exit:
ly_set_free(set, NULL);
return dnode_ret;
}
struct lyd_node *yang_dnode_getf(const struct lyd_node *dnode,
const char *xpath_fmt, ...)
{
va_list ap;
char xpath[XPATH_MAXLEN];
va_start(ap, xpath_fmt);
vsnprintf(xpath, sizeof(xpath), xpath_fmt, ap);
va_end(ap);
return yang_dnode_get(dnode, xpath);
}
bool yang_dnode_exists(const struct lyd_node *dnode, const char *xpath)
{
struct ly_set *set = NULL;
bool exists = false;
if (xpath[0] == '.' && xpath[1] == '/')
xpath += 2;
if (lyd_find_xpath(dnode, xpath, &set))
return false;
exists = set->count > 0;
ly_set_free(set, NULL);
return exists;
}
bool yang_dnode_existsf(const struct lyd_node *dnode, const char *xpath_fmt,
...)
{
va_list ap;
char xpath[XPATH_MAXLEN];
va_start(ap, xpath_fmt);
vsnprintf(xpath, sizeof(xpath), xpath_fmt, ap);
va_end(ap);
return yang_dnode_exists(dnode, xpath);
}
void yang_dnode_iterate(yang_dnode_iter_cb cb, void *arg,
const struct lyd_node *dnode, const char *xpath_fmt,
...)
{
va_list ap;
char xpath[XPATH_MAXLEN];
struct ly_set *set;
va_start(ap, xpath_fmt);
vsnprintf(xpath, sizeof(xpath), xpath_fmt, ap);
va_end(ap);
if (lyd_find_xpath(dnode, xpath, &set)) {
assert(0); /* XXX libyang2: ly1 code asserted success */
return;
}
for (unsigned int i = 0; i < set->count; i++) {
int ret;
ret = (*cb)(set->dnodes[i], arg);
if (ret == YANG_ITER_STOP)
break;
}
ly_set_free(set, NULL);
}
bool yang_dnode_is_default(const struct lyd_node *dnode, const char *xpath)
{
const struct lysc_node *snode;
struct lysc_node_leaf *sleaf;
if (xpath)
dnode = yang_dnode_get(dnode, xpath);
assert(dnode);
snode = dnode->schema;
switch (snode->nodetype) {
case LYS_LEAF:
sleaf = (struct lysc_node_leaf *)snode;
if (sleaf->type->basetype == LY_TYPE_EMPTY)
return false;
return lyd_is_default(dnode);
case LYS_LEAFLIST:
/* TODO: check leaf-list default values */
return false;
case LYS_CONTAINER:
if (CHECK_FLAG(snode->flags, LYS_PRESENCE))
return false;
return true;
default:
return false;
}
}
bool yang_dnode_is_defaultf(const struct lyd_node *dnode, const char *xpath_fmt,
...)
{
if (!xpath_fmt)
return yang_dnode_is_default(dnode, NULL);
else {
va_list ap;
char xpath[XPATH_MAXLEN];
va_start(ap, xpath_fmt);
vsnprintf(xpath, sizeof(xpath), xpath_fmt, ap);
va_end(ap);
return yang_dnode_is_default(dnode, xpath);
}
}
bool yang_dnode_is_default_recursive(const struct lyd_node *dnode)
{
struct lyd_node *root, *dnode_iter;
if (!yang_dnode_is_default(dnode, NULL))
return false;
if (CHECK_FLAG(dnode->schema->nodetype, LYS_LEAF | LYS_LEAFLIST))
return true;
LY_LIST_FOR (lyd_child(dnode), root) {
LYD_TREE_DFS_BEGIN (root, dnode_iter) {
if (!yang_dnode_is_default(dnode_iter, NULL))
return false;
LYD_TREE_DFS_END(root, dnode_iter);
}
}
return true;
}
void yang_dnode_change_leaf(struct lyd_node *dnode, const char *value)
{
assert(dnode->schema->nodetype == LYS_LEAF);
lyd_change_term(dnode, value);
}
struct lyd_node *yang_dnode_new(struct ly_ctx *ly_ctx, bool config_only)
{
struct lyd_node *dnode = NULL;
int options = config_only ? LYD_VALIDATE_NO_STATE : 0;
if (lyd_validate_all(&dnode, ly_ctx, options, NULL) != 0) {
/* Should never happen. */
flog_err(EC_LIB_LIBYANG, "%s: lyd_validate() failed", __func__);
exit(1);
}
return dnode;
}
struct lyd_node *yang_dnode_dup(const struct lyd_node *dnode)
{
struct lyd_node *dup = NULL;
LY_ERR err;
err = lyd_dup_siblings(dnode, NULL, LYD_DUP_RECURSIVE, &dup);
assert(!err);
return dup;
}
void yang_dnode_free(struct lyd_node *dnode)
{
while (dnode->parent)
dnode = lyd_parent(dnode);
lyd_free_all(dnode);
}
struct yang_data *yang_data_new(const char *xpath, const char *value)
{
struct yang_data *data;
data = XCALLOC(MTYPE_YANG_DATA, sizeof(*data));
strlcpy(data->xpath, xpath, sizeof(data->xpath));
if (value)
data->value = strdup(value);
return data;
}
void yang_data_free(struct yang_data *data)
{
if (data->value)
free(data->value);
XFREE(MTYPE_YANG_DATA, data);
}
struct list *yang_data_list_new(void)
{
struct list *list;
list = list_new();
list->del = (void (*)(void *))yang_data_free;
return list;
}
struct yang_data *yang_data_list_find(const struct list *list,
const char *xpath_fmt, ...)
{
char xpath[XPATH_MAXLEN];
struct yang_data *data;
struct listnode *node;
va_list ap;
va_start(ap, xpath_fmt);
vsnprintf(xpath, sizeof(xpath), xpath_fmt, ap);
va_end(ap);
for (ALL_LIST_ELEMENTS_RO(list, node, data))
if (strmatch(data->xpath, xpath))
return data;
return NULL;
}
/* Make libyang log its errors using FRR logging infrastructure. */
static void ly_log_cb(LY_LOG_LEVEL level, const char *msg, const char *path)
{
int priority = LOG_ERR;
switch (level) {
case LY_LLERR:
priority = LOG_ERR;
break;
case LY_LLWRN:
priority = LOG_WARNING;
break;
case LY_LLVRB:
case LY_LLDBG:
priority = LOG_DEBUG;
break;
}
if (path)
zlog(priority, "libyang: %s (%s)", msg, path);
else
zlog(priority, "libyang: %s", msg);
}
const char *yang_print_errors(struct ly_ctx *ly_ctx, char *buf, size_t buf_len)
{
struct ly_err_item *ei;
const char *path;
ei = ly_err_first(ly_ctx);
if (!ei)
return "";
strlcpy(buf, "YANG error(s):\n", buf_len);
for (; ei; ei = ei->next) {
strlcat(buf, " ", buf_len);
strlcat(buf, ei->msg, buf_len);
strlcat(buf, "\n", buf_len);
}
path = ly_errpath(ly_ctx);
if (path) {
strlcat(buf, " YANG path: ", buf_len);
strlcat(buf, path, buf_len);
strlcat(buf, "\n", buf_len);
}
ly_err_clean(ly_ctx, NULL);
return buf;
}
void yang_debugging_set(bool enable)
{
if (enable) {
ly_log_level(LY_LLDBG);
ly_log_dbg_groups(0xFF);
} else {
ly_log_level(LY_LLERR);
ly_log_dbg_groups(0);
}
}
struct ly_ctx *yang_ctx_new_setup(bool embedded_modules, bool explicit_compile)
{
struct ly_ctx *ctx = NULL;
const char *yang_models_path = YANG_MODELS_PATH;
LY_ERR err;
if (access(yang_models_path, R_OK | X_OK)) {
yang_models_path = NULL;
if (errno == ENOENT)
zlog_info("yang model directory \"%s\" does not exist",
YANG_MODELS_PATH);
else
flog_err_sys(EC_LIB_LIBYANG,
"cannot access yang model directory \"%s\"",
YANG_MODELS_PATH);
}
uint options = LY_CTX_NO_YANGLIBRARY | LY_CTX_DISABLE_SEARCHDIR_CWD;
if (explicit_compile)
options |= LY_CTX_EXPLICIT_COMPILE;
err = ly_ctx_new(yang_models_path, options, &ctx);
if (err)
return NULL;
if (embedded_modules)
ly_ctx_set_module_imp_clb(ctx, yang_module_imp_clb, NULL);
return ctx;
}
void yang_init(bool embedded_modules, bool defer_compile)
{
/* Initialize libyang global parameters that affect all containers. */
ly_set_log_clb(ly_log_cb, 1);
ly_log_options(LY_LOLOG | LY_LOSTORE);
/* Initialize libyang container for native models. */
ly_native_ctx = yang_ctx_new_setup(embedded_modules, defer_compile);
if (!ly_native_ctx) {
flog_err(EC_LIB_LIBYANG, "%s: ly_ctx_new() failed", __func__);
exit(1);
}
yang_translator_init();
}
void yang_init_loading_complete(void)
{
/* Compile everything */
if (ly_ctx_compile(ly_native_ctx) != LY_SUCCESS) {
flog_err(EC_LIB_YANG_MODULE_LOAD,
"%s: failed to compile loaded modules: %s", __func__,
ly_errmsg(ly_native_ctx));
exit(1);
}
}
void yang_terminate(void)
{
struct yang_module *module;
yang_translator_terminate();
while (!RB_EMPTY(yang_modules, &yang_modules)) {
module = RB_ROOT(yang_modules, &yang_modules);
/*
* We shouldn't call ly_ctx_remove_module() here because this
* function also removes other modules that depend on it.
*
* ly_ctx_destroy() will release all memory for us.
*/
RB_REMOVE(yang_modules, &yang_modules, module);
XFREE(MTYPE_YANG_MODULE, module);
}
ly_ctx_destroy(ly_native_ctx);
}
const struct lyd_node *yang_dnode_get_parent(const struct lyd_node *dnode,
const char *name)
{
const struct lyd_node *orig_dnode = dnode;
while (orig_dnode) {
switch (orig_dnode->schema->nodetype) {
case LYS_LIST:
case LYS_CONTAINER:
if (!strcmp(orig_dnode->schema->name, name))
return orig_dnode;
break;
default:
break;
}
orig_dnode = lyd_parent(orig_dnode);
}
return NULL;
}
bool yang_is_last_list_dnode(const struct lyd_node *dnode)
{
return (((dnode->next == NULL)
|| (dnode->next
&& (strcmp(dnode->next->schema->name, dnode->schema->name)
!= 0)))
&& dnode->prev
&& ((dnode->prev == dnode)
|| (strcmp(dnode->prev->schema->name, dnode->schema->name)
!= 0)));
}
bool yang_is_last_level_dnode(const struct lyd_node *dnode)
{
const struct lyd_node *parent;
const struct lyd_node *key_leaf;
uint8_t keys_size;
switch (dnode->schema->nodetype) {
case LYS_LIST:
assert(dnode->parent);
parent = lyd_parent(dnode);
uint snode_num_keys = yang_snode_num_keys(parent->schema);
/* XXX libyang2: q: really don't understand this code. */
key_leaf = dnode->prev;
for (keys_size = 1; keys_size < snode_num_keys; keys_size++)
key_leaf = key_leaf->prev;
if (key_leaf->prev == dnode)
return true;
break;
case LYS_CONTAINER:
return true;
default:
break;
}
return false;
}
const struct lyd_node *
yang_get_subtree_with_no_sibling(const struct lyd_node *dnode)
{
bool parent = true;
const struct lyd_node *node;
node = dnode;
if (node->schema->nodetype != LYS_LIST)
return node;
while (parent) {
switch (node->schema->nodetype) {
case LYS_CONTAINER:
if (!CHECK_FLAG(node->schema->flags, LYS_PRESENCE)) {
if (node->parent
&& (node->parent->schema->module
== dnode->schema->module))
node = lyd_parent(node);
else
parent = false;
} else
parent = false;
break;
case LYS_LIST:
if (yang_is_last_list_dnode(node)
&& yang_is_last_level_dnode(node)) {
if (node->parent
&& (node->parent->schema->module
== dnode->schema->module))
node = lyd_parent(node);
else
parent = false;
} else
parent = false;
break;
default:
parent = false;
break;
}
}
return node;
}
uint32_t yang_get_list_pos(const struct lyd_node *node)
{
return lyd_list_pos(node);
}
uint32_t yang_get_list_elements_count(const struct lyd_node *node)
{
unsigned int count;
const struct lysc_node *schema;
if (!node
|| ((node->schema->nodetype != LYS_LIST)
&& (node->schema->nodetype != LYS_LEAFLIST))) {
return 0;
}
schema = node->schema;
count = 0;
do {
if (node->schema == schema)
++count;
node = node->next;
} while (node);
return count;
}
|