forked from CESNET/libyang
-
Notifications
You must be signed in to change notification settings - Fork 0
/
schema_compile.c
1736 lines (1504 loc) · 61.2 KB
/
schema_compile.c
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
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/**
* @file schema_compile.c
* @author Radek Krejci <rkrejci@cesnet.cz>
* @brief Schema compilation.
*
* Copyright (c) 2015 - 2020 CESNET, z.s.p.o.
*
* This source code is licensed under BSD 3-Clause License (the "License").
* You may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://opensource.org/licenses/BSD-3-Clause
*/
#define _GNU_SOURCE
#include "schema_compile.h"
#include <assert.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "common.h"
#include "compat.h"
#include "context.h"
#include "dict.h"
#include "in.h"
#include "log.h"
#include "parser_schema.h"
#include "path.h"
#include "plugins.h"
#include "plugins_exts.h"
#include "plugins_exts_compile.h"
#include "plugins_internal.h"
#include "plugins_types.h"
#include "schema_compile_amend.h"
#include "schema_compile_node.h"
#include "schema_features.h"
#include "set.h"
#include "tree.h"
#include "tree_data.h"
#include "tree_schema.h"
#include "tree_schema_internal.h"
#include "xpath.h"
/**
* @brief Fill in the prepared compiled extensions definition structure according to the parsed extension definition.
*/
static LY_ERR
lys_compile_extension(struct lysc_ctx *ctx, const struct lys_module *ext_mod, struct lysp_ext *ext_p, struct lysc_ext **ext)
{
LY_ERR ret = LY_SUCCESS;
if (ext_p->compiled && (ext_p->compiled->refcount == 1)) {
/* context recompilation - all the extension instances were previously freed (the last link to the compiled extension
* remains from the parsed extension definition) and now we are recompiling them again, to have the up-to-date
* extension definition, we have to recompile it as well now */
lysc_extension_free(ctx->ctx, &ext_p->compiled);
}
if (!ext_p->compiled) {
lysc_update_path(ctx, NULL, "{extension}");
lysc_update_path(ctx, NULL, ext_p->name);
/* compile the extension definition */
ext_p->compiled = calloc(1, sizeof **ext);
ext_p->compiled->refcount = 1;
DUP_STRING_GOTO(ctx->ctx, ext_p->name, ext_p->compiled->name, ret, done);
DUP_STRING_GOTO(ctx->ctx, ext_p->argname, ext_p->compiled->argname, ret, done);
ext_p->compiled->module = (struct lys_module *)ext_mod;
COMPILE_EXTS_GOTO(ctx, ext_p->exts, ext_p->compiled->exts, *ext, ret, done);
lysc_update_path(ctx, NULL, NULL);
lysc_update_path(ctx, NULL, NULL);
/* find extension definition plugin */
ext_p->compiled->plugin = lyplg_find(LYPLG_EXTENSION, ext_p->compiled->module->name,
ext_p->compiled->module->revision, ext_p->compiled->name);
}
*ext = lysc_ext_dup(ext_p->compiled);
done:
if (ret) {
lysc_update_path(ctx, NULL, NULL);
lysc_update_path(ctx, NULL, NULL);
}
return ret;
}
LY_ERR
lys_compile_ext(struct lysc_ctx *ctx, struct lysp_ext_instance *ext_p, struct lysc_ext_instance *ext, void *parent,
const struct lys_module *ext_mod)
{
LY_ERR ret = LY_SUCCESS;
struct lysp_ext *ext_def;
ext->parent_stmt = ext_p->parent_stmt;
ext->parent_stmt_index = ext_p->parent_stmt_index;
ext->module = ctx->cur_mod;
ext->parent = parent;
lysc_update_path(ctx, LY_STMT_IS_NODE(ext->parent_stmt) ? ((struct lysc_node *)ext->parent)->module : NULL, "{extension}");
lysc_update_path(ctx, NULL, ext_p->name);
LY_CHECK_GOTO(ret = lysp_ext_find_definition(ctx->ctx, ext_p, &ext_mod, &ext_def), cleanup);
LY_CHECK_GOTO(ret = lys_compile_extension(ctx, ext_mod, ext_def, &ext->def), cleanup);
if (ext_def->argname) {
LY_CHECK_GOTO(ret = lysp_ext_instance_resolve_argument(ctx->ctx, ext_p, ext_def), cleanup);
}
DUP_STRING(ctx->ctx, ext_p->argument, ext->argument, ret);
LY_CHECK_RET(ret);
if (ext->def->plugin && ext->def->plugin->compile) {
if (ext->argument) {
lysc_update_path(ctx, ext->module, ext->argument);
}
ret = ext->def->plugin->compile(ctx, ext_p, ext);
if (ret == LY_ENOT) {
lysc_ext_instance_free(ctx->ctx, ext);
}
if (ext->argument) {
lysc_update_path(ctx, NULL, NULL);
}
LY_CHECK_GOTO(ret, cleanup);
}
cleanup:
lysc_update_path(ctx, NULL, NULL);
lysc_update_path(ctx, NULL, NULL);
return ret;
}
struct lysc_ext *
lysc_ext_dup(struct lysc_ext *orig)
{
++orig->refcount;
return orig;
}
API LY_ERR
lysc_ext_substmt(const struct lysc_ext_instance *ext, enum ly_stmt substmt, void **instance_p, enum ly_stmt_cardinality *cardinality_p)
{
LY_ARRAY_COUNT_TYPE u;
LY_ARRAY_FOR(ext->substmts, u) {
if (LY_STMT_IS_DATA_NODE(substmt)) {
if (!LY_STMT_IS_DATA_NODE(ext->substmts[u].stmt)) {
continue;
}
} else if (LY_STMT_IS_OP(substmt)) {
if (!LY_STMT_IS_OP(ext->substmts[u].stmt)) {
continue;
}
} else if (ext->substmts[u].stmt != substmt) {
continue;
}
/* match */
if (cardinality_p) {
*cardinality_p = ext->substmts[u].cardinality;
}
if (instance_p) {
*instance_p = ext->substmts[u].storage;
}
return LY_SUCCESS;
}
return LY_ENOT;
}
static void
lysc_unres_dflt_free(const struct ly_ctx *ctx, struct lysc_unres_dflt *r)
{
assert(!r->dflt || !r->dflts);
if (r->dflt) {
lysp_qname_free((struct ly_ctx *)ctx, r->dflt);
free(r->dflt);
} else {
FREE_ARRAY((struct ly_ctx *)ctx, r->dflts, lysp_qname_free);
}
free(r);
}
void
lysc_update_path(struct lysc_ctx *ctx, struct lys_module *parent_module, const char *name)
{
int len;
uint8_t nextlevel = 0; /* 0 - no starttag, 1 - '/' starttag, 2 - '=' starttag + '}' endtag */
if (!name) {
/* removing last path segment */
if (ctx->path[ctx->path_len - 1] == '}') {
for ( ; ctx->path[ctx->path_len] != '=' && ctx->path[ctx->path_len] != '{'; --ctx->path_len) {}
if (ctx->path[ctx->path_len] == '=') {
ctx->path[ctx->path_len++] = '}';
} else {
/* not a top-level special tag, remove also preceiding '/' */
goto remove_nodelevel;
}
} else {
remove_nodelevel:
for ( ; ctx->path[ctx->path_len] != '/'; --ctx->path_len) {}
if (ctx->path_len == 0) {
/* top-level (last segment) */
ctx->path_len = 1;
}
}
/* set new terminating NULL-byte */
ctx->path[ctx->path_len] = '\0';
} else {
if (ctx->path_len > 1) {
if (!parent_module && (ctx->path[ctx->path_len - 1] == '}') && (ctx->path[ctx->path_len - 2] != '\'')) {
/* extension of the special tag */
nextlevel = 2;
--ctx->path_len;
} else {
/* there is already some path, so add next level */
nextlevel = 1;
}
} /* else the path is just initiated with '/', so do not add additional slash in case of top-level nodes */
if (nextlevel != 2) {
if ((parent_module && (parent_module == ctx->cur_mod)) || (!parent_module && (ctx->path_len > 1) && (name[0] == '{'))) {
/* module not changed, print the name unprefixed */
len = snprintf(&ctx->path[ctx->path_len], LYSC_CTX_BUFSIZE - ctx->path_len, "%s%s", nextlevel ? "/" : "", name);
} else {
len = snprintf(&ctx->path[ctx->path_len], LYSC_CTX_BUFSIZE - ctx->path_len, "%s%s:%s", nextlevel ? "/" : "", ctx->cur_mod->name, name);
}
} else {
len = snprintf(&ctx->path[ctx->path_len], LYSC_CTX_BUFSIZE - ctx->path_len, "='%s'}", name);
}
if (len >= LYSC_CTX_BUFSIZE - (int)ctx->path_len) {
/* output truncated */
ctx->path_len = LYSC_CTX_BUFSIZE - 1;
} else {
ctx->path_len += len;
}
}
LOG_LOCBACK(0, 0, 1, 0);
LOG_LOCSET(NULL, NULL, ctx->path, NULL);
}
LY_ERR
lys_identity_precompile(struct lysc_ctx *ctx_sc, struct ly_ctx *ctx, struct lysp_module *parsed_mod,
struct lysp_ident *identities_p, struct lysc_ident **identities)
{
LY_ARRAY_COUNT_TYPE u;
struct lysc_ctx context = {0};
struct lysc_ident *ident;
LY_ERR ret = LY_SUCCESS;
ly_bool enabled;
assert(ctx_sc || ctx);
if (!ctx_sc) {
context.ctx = ctx;
context.cur_mod = parsed_mod ? parsed_mod->mod : NULL;
context.pmod = parsed_mod;
context.path_len = 1;
context.path[0] = '/';
ctx_sc = &context;
}
if (!identities_p) {
return LY_SUCCESS;
}
lysc_update_path(ctx_sc, NULL, "{identity}");
LY_ARRAY_FOR(identities_p, u) {
/* evaluate if-features */
LY_CHECK_RET(lys_eval_iffeatures(ctx, identities_p[u].iffeatures, &enabled));
if (!enabled) {
continue;
}
lysc_update_path(ctx_sc, NULL, identities_p[u].name);
/* add new compiled identity */
LY_ARRAY_NEW_RET(ctx_sc->ctx, *identities, ident, LY_EMEM);
DUP_STRING_GOTO(ctx_sc->ctx, identities_p[u].name, ident->name, ret, done);
DUP_STRING_GOTO(ctx_sc->ctx, identities_p[u].dsc, ident->dsc, ret, done);
DUP_STRING_GOTO(ctx_sc->ctx, identities_p[u].ref, ident->ref, ret, done);
ident->module = ctx_sc->cur_mod;
/* backlinks (derived) can be added no sooner than when all the identities in the current module are present */
COMPILE_EXTS_GOTO(ctx_sc, identities_p[u].exts, ident->exts, ident, ret, done);
ident->flags = identities_p[u].flags;
lysc_update_path(ctx_sc, NULL, NULL);
}
lysc_update_path(ctx_sc, NULL, NULL);
done:
return ret;
}
/**
* @brief Check circular dependency of identities - identity MUST NOT reference itself (via their base statement).
*
* The function works in the same way as lys_compile_feature_circular_check() with different structures and error messages.
*
* @param[in] ctx Compile context for logging.
* @param[in] ident The base identity (its derived list is being extended by the identity being currently processed).
* @param[in] derived The list of derived identities of the identity being currently processed (not the one provided as @p ident)
* @return LY_SUCCESS if everything is ok.
* @return LY_EVALID if the identity is derived from itself.
*/
static LY_ERR
lys_compile_identity_circular_check(struct lysc_ctx *ctx, struct lysc_ident *ident, struct lysc_ident **derived)
{
LY_ERR ret = LY_SUCCESS;
LY_ARRAY_COUNT_TYPE u, v;
struct ly_set recursion = {0};
struct lysc_ident *drv;
if (!derived) {
return LY_SUCCESS;
}
for (u = 0; u < LY_ARRAY_COUNT(derived); ++u) {
if (ident == derived[u]) {
LOGVAL(ctx->ctx, LYVE_REFERENCE,
"Identity \"%s\" is indirectly derived from itself.", ident->name);
ret = LY_EVALID;
goto cleanup;
}
ret = ly_set_add(&recursion, derived[u], 0, NULL);
LY_CHECK_GOTO(ret, cleanup);
}
for (v = 0; v < recursion.count; ++v) {
drv = recursion.objs[v];
for (u = 0; u < LY_ARRAY_COUNT(drv->derived); ++u) {
if (ident == drv->derived[u]) {
LOGVAL(ctx->ctx, LYVE_REFERENCE,
"Identity \"%s\" is indirectly derived from itself.", ident->name);
ret = LY_EVALID;
goto cleanup;
}
ret = ly_set_add(&recursion, drv->derived[u], 0, NULL);
LY_CHECK_GOTO(ret, cleanup);
}
}
cleanup:
ly_set_erase(&recursion, NULL);
return ret;
}
LY_ERR
lys_compile_identity_bases(struct lysc_ctx *ctx, const struct lysp_module *base_pmod, const char **bases_p,
struct lysc_ident *ident, struct lysc_ident ***bases, ly_bool *enabled)
{
LY_ARRAY_COUNT_TYPE u, v;
const char *s, *name;
const struct lys_module *mod;
struct lysc_ident **idref;
assert((ident && enabled) || bases);
if ((LY_ARRAY_COUNT(bases_p) > 1) && (ctx->pmod->version < LYS_VERSION_1_1)) {
LOGVAL(ctx->ctx, LYVE_SYNTAX_YANG,
"Multiple bases in %s are allowed only in YANG 1.1 modules.", ident ? "identity" : "identityref type");
return LY_EVALID;
}
LY_ARRAY_FOR(bases_p, u) {
s = strchr(bases_p[u], ':');
if (s) {
/* prefixed identity */
name = &s[1];
mod = ly_resolve_prefix(ctx->ctx, bases_p[u], s - bases_p[u], LY_PREF_SCHEMA, (void *)base_pmod);
} else {
name = bases_p[u];
mod = base_pmod->mod;
}
if (!mod) {
if (ident) {
LOGVAL(ctx->ctx, LYVE_SYNTAX_YANG,
"Invalid prefix used for base (%s) of identity \"%s\".", bases_p[u], ident->name);
} else {
LOGVAL(ctx->ctx, LYVE_SYNTAX_YANG,
"Invalid prefix used for base (%s) of identityref.", bases_p[u]);
}
return LY_EVALID;
}
idref = NULL;
LY_ARRAY_FOR(mod->identities, v) {
if (!strcmp(name, mod->identities[v].name)) {
if (ident) {
if (ident == &mod->identities[v]) {
LOGVAL(ctx->ctx, LYVE_REFERENCE,
"Identity \"%s\" is derived from itself.", ident->name);
return LY_EVALID;
}
LY_CHECK_RET(lys_compile_identity_circular_check(ctx, &mod->identities[v], ident->derived));
/* we have match! store the backlink */
LY_ARRAY_NEW_RET(ctx->ctx, mod->identities[v].derived, idref, LY_EMEM);
*idref = ident;
} else {
/* we have match! store the found identity */
LY_ARRAY_NEW_RET(ctx->ctx, *bases, idref, LY_EMEM);
*idref = &mod->identities[v];
}
break;
}
}
if (!idref || !(*idref)) {
if (ident || (ctx->options & LYS_COMPILE_DISABLED)) {
/* look into the parsed module to check whether the identity is not merely disabled */
LY_ARRAY_FOR(mod->parsed->identities, v) {
if (!strcmp(mod->parsed->identities[v].name, name)) {
if (ident) {
*enabled = 0;
}
return LY_SUCCESS;
}
}
}
if (ident) {
LOGVAL(ctx->ctx, LYVE_SYNTAX_YANG,
"Unable to find base (%s) of identity \"%s\".", bases_p[u], ident->name);
} else {
LOGVAL(ctx->ctx, LYVE_SYNTAX_YANG,
"Unable to find base (%s) of identityref.", bases_p[u]);
}
return LY_EVALID;
}
}
if (ident) {
*enabled = 1;
}
return LY_SUCCESS;
}
/**
* @brief For the given array of identities, set the backlinks from all their base identities.
* @param[in] ctx Compile context, not only for logging but also to get the current module to resolve prefixes.
* @param[in] idents_p Array of identities definitions from the parsed schema structure.
* @param[in,out] idents Array of referencing identities to which the backlinks are supposed to be set. Any
* identities with disabled bases are removed.
* @return LY_ERR value - LY_SUCCESS or LY_EVALID.
*/
static LY_ERR
lys_compile_identities_derived(struct lysc_ctx *ctx, struct lysp_ident *idents_p, struct lysc_ident **idents)
{
LY_ARRAY_COUNT_TYPE u, v;
ly_bool enabled;
lysc_update_path(ctx, NULL, "{identity}");
restart:
for (u = 0, v = 0; u < LY_ARRAY_COUNT(*idents); ++u) {
/* find matching parsed identity, the disabled ones are missing in the compiled array */
while (v < LY_ARRAY_COUNT(idents_p)) {
if (idents_p[v].name == (*idents)[u].name) {
break;
}
++v;
}
assert(v < LY_ARRAY_COUNT(idents_p));
if (!idents_p[v].bases) {
continue;
}
lysc_update_path(ctx, NULL, (*idents)[u].name);
LY_CHECK_RET(lys_compile_identity_bases(ctx, (*idents)[u].module->parsed, idents_p[v].bases, &(*idents)[u], NULL,
&enabled));
lysc_update_path(ctx, NULL, NULL);
if (!enabled) {
/* remove the identity */
lysc_ident_free(ctx->ctx, &(*idents)[u]);
LY_ARRAY_DECREMENT(*idents);
if (u < LY_ARRAY_COUNT(*idents)) {
memmove(&(*idents)[u], &(*idents)[u + 1], (LY_ARRAY_COUNT(*idents) - u) * sizeof **idents);
}
/* revert compilation of all the previous identities */
for (v = 0; v < u; ++v) {
LY_ARRAY_FREE((*idents)[v].derived);
(*idents)[v].derived = NULL;
}
/* free the whole array if there are no identites left */
if (!LY_ARRAY_COUNT(*idents)) {
LY_ARRAY_FREE(*idents);
*idents = NULL;
}
/* restart the whole process without this identity */
goto restart;
}
}
lysc_update_path(ctx, NULL, NULL);
return LY_SUCCESS;
}
static void *
lys_compile_extension_instance_storage(enum ly_stmt stmt, struct lysc_ext_substmt *substmts)
{
for (LY_ARRAY_COUNT_TYPE u = 0; substmts[u].stmt; ++u) {
if (substmts[u].stmt == stmt) {
return substmts[u].storage;
}
}
return NULL;
}
LY_ERR
lys_compile_extension_instance(struct lysc_ctx *ctx, const struct lysp_ext_instance *ext_p, struct lysc_ext_instance *ext)
{
LY_ERR ret = LY_EVALID, r;
LY_ARRAY_COUNT_TYPE u;
struct lysp_stmt *stmt;
void *parsed = NULL, **compiled = NULL;
/* check for invalid substatements */
for (stmt = ext_p->child; stmt; stmt = stmt->next) {
if (stmt->flags & (LYS_YIN_ATTR | LYS_YIN_ARGUMENT)) {
continue;
}
LY_ARRAY_FOR(ext->substmts, u) {
if (ext->substmts[u].stmt == stmt->kw) {
break;
}
}
if (u == LY_ARRAY_COUNT(ext->substmts)) {
LOGVAL(ctx->ctx, LYVE_SYNTAX_YANG, "Invalid keyword \"%s\" as a child of \"%s%s%s\" extension instance.",
stmt->stmt, ext_p->name, ext_p->argument ? " " : "", ext_p->argument ? ext_p->argument : "");
goto cleanup;
}
}
/* TODO store inherited data, e.g. status first, but mark them somehow to allow to overwrite them and not detect duplicity */
/* note into the compile context that we are processing extension now */
ctx->ext = ext;
/* keep order of the processing the same as the order in the defined substmts,
* the order is important for some of the statements depending on others (e.g. type needs status and units) */
LY_ARRAY_FOR(ext->substmts, u) {
uint64_t stmt_counter = 0;
for (stmt = ext_p->child; stmt; stmt = stmt->next) {
if (ext->substmts[u].stmt != stmt->kw) {
continue;
}
parsed = NULL;
stmt_counter++;
if (ext->substmts[u].storage) {
switch (stmt->kw) {
case LY_STMT_ACTION:
case LY_STMT_ANYDATA:
case LY_STMT_ANYXML:
case LY_STMT_CONTAINER:
case LY_STMT_CHOICE:
case LY_STMT_LEAF:
case LY_STMT_LEAF_LIST:
case LY_STMT_LIST:
case LY_STMT_NOTIFICATION:
case LY_STMT_RPC:
case LY_STMT_USES:
r = lysp_stmt_parse(ctx, stmt, &parsed, NULL);
LY_CHECK_ERR_GOTO(r, ret = r, cleanup);
/* set storage as an alternative document root in the compile context */
r = lys_compile_node(ctx, parsed, NULL, 0, NULL);
lysp_node_free(ctx->ctx, parsed);
LY_CHECK_ERR_GOTO(r, ret = r, cleanup);
break;
case LY_STMT_DESCRIPTION:
case LY_STMT_REFERENCE:
case LY_STMT_UNITS: {
const char **str_p;
if (ext->substmts[u].cardinality < LY_STMT_CARD_SOME) {
/* single item */
if (*((const char **)ext->substmts[u].storage)) {
LOGVAL(ctx->ctx, LY_VCODE_DUPSTMT, stmt->stmt);
goto cleanup;
}
str_p = (const char **)ext->substmts[u].storage;
} else {
/* sized array */
const char ***strings_array = (const char ***)ext->substmts[u].storage;
LY_ARRAY_NEW_GOTO(ctx->ctx, *strings_array, str_p, ret, cleanup);
}
r = lydict_insert(ctx->ctx, stmt->arg, 0, str_p);
LY_CHECK_ERR_GOTO(r, ret = r, cleanup);
break;
}
case LY_STMT_IF_FEATURE: {
ly_bool enabled;
r = lysp_stmt_parse(ctx, stmt, &parsed, NULL);
LY_CHECK_ERR_GOTO(r, ret = r, cleanup);
r = lys_eval_iffeatures(ctx->ctx, parsed, &enabled);
FREE_ARRAY(ctx->ctx, (struct lysp_qname *)parsed, lysp_qname_free);
LY_CHECK_ERR_GOTO(r, ret = r, cleanup);
if (!enabled) {
/* it is disabled, remove the whole extension instance */
return LY_ENOT;
}
break;
}
case LY_STMT_STATUS:
assert(ext->substmts[u].cardinality < LY_STMT_CARD_SOME);
LY_CHECK_ERR_GOTO(r = lysp_stmt_parse(ctx, stmt, &ext->substmts[u].storage, /* TODO */ NULL), ret = r, cleanup);
break;
case LY_STMT_TYPE: {
uint16_t *flags = lys_compile_extension_instance_storage(LY_STMT_STATUS, ext->substmts);
const char **units = lys_compile_extension_instance_storage(LY_STMT_UNITS, ext->substmts);
if (ext->substmts[u].cardinality < LY_STMT_CARD_SOME) {
/* single item */
if (*(struct lysc_type **)ext->substmts[u].storage) {
LOGVAL(ctx->ctx, LY_VCODE_DUPSTMT, stmt->stmt);
goto cleanup;
}
compiled = ext->substmts[u].storage;
} else {
/* sized array */
struct lysc_type ***types = (struct lysc_type ***)ext->substmts[u].storage, **type = NULL;
LY_ARRAY_NEW_GOTO(ctx->ctx, *types, type, ret, cleanup);
compiled = (void *)type;
}
r = lysp_stmt_parse(ctx, stmt, &parsed, NULL);
LY_CHECK_ERR_GOTO(r, ret = r, cleanup);
r = lys_compile_type(ctx, NULL, flags ? *flags : 0, ext_p->name, parsed, (struct lysc_type **)compiled,
units && !*units ? units : NULL, NULL);
lysp_type_free(ctx->ctx, parsed);
free(parsed);
LY_CHECK_ERR_GOTO(r, ret = r, cleanup);
break;
}
/* TODO support other substatements (parse stmt to lysp and then compile lysp to lysc),
* also note that in many statements their extensions are not taken into account */
default:
LOGVAL(ctx->ctx, LYVE_SYNTAX_YANG, "Statement \"%s\" is not supported as an extension (found in \"%s%s%s\") substatement.",
stmt->stmt, ext_p->name, ext_p->argument ? " " : "", ext_p->argument ? ext_p->argument : "");
goto cleanup;
}
}
}
if (((ext->substmts[u].cardinality == LY_STMT_CARD_MAND) || (ext->substmts[u].cardinality == LY_STMT_CARD_SOME)) && !stmt_counter) {
LOGVAL(ctx->ctx, LYVE_SYNTAX_YANG, "Missing mandatory keyword \"%s\" as a child of \"%s%s%s\".",
ly_stmt2str(ext->substmts[u].stmt), ext_p->name, ext_p->argument ? " " : "", ext_p->argument ? ext_p->argument : "");
goto cleanup;
}
}
ret = LY_SUCCESS;
cleanup:
ctx->ext = NULL;
return ret;
}
/**
* @brief Check when for cyclic dependencies.
*
* @param[in] set Set with all the referenced nodes.
* @param[in] node Node whose "when" referenced nodes are in @p set.
* @return LY_ERR value
*/
static LY_ERR
lys_compile_unres_when_cyclic(struct lyxp_set *set, const struct lysc_node *node)
{
struct lyxp_set tmp_set;
struct lyxp_set_scnode *xp_scnode;
uint32_t i, j;
LY_ARRAY_COUNT_TYPE u;
LY_ERR ret = LY_SUCCESS;
memset(&tmp_set, 0, sizeof tmp_set);
/* prepare in_ctx of the set */
for (i = 0; i < set->used; ++i) {
xp_scnode = &set->val.scnodes[i];
if (xp_scnode->in_ctx != LYXP_SET_SCNODE_START_USED) {
/* check node when, skip the context node (it was just checked) */
xp_scnode->in_ctx = LYXP_SET_SCNODE_ATOM_CTX;
}
}
for (i = 0; i < set->used; ++i) {
xp_scnode = &set->val.scnodes[i];
if (xp_scnode->in_ctx != LYXP_SET_SCNODE_ATOM_CTX) {
/* already checked */
continue;
}
if ((xp_scnode->type != LYXP_NODE_ELEM) || (xp_scnode->scnode->nodetype & (LYS_RPC | LYS_ACTION | LYS_NOTIF)) ||
!lysc_node_when(xp_scnode->scnode)) {
/* no when to check */
xp_scnode->in_ctx = LYXP_SET_SCNODE_ATOM;
continue;
}
node = xp_scnode->scnode;
do {
struct lysc_when **when_list, *when;
LOG_LOCSET(node, NULL, NULL, NULL);
when_list = lysc_node_when(node);
LY_ARRAY_FOR(when_list, u) {
when = when_list[u];
ret = lyxp_atomize(set->ctx, when->cond, node->module, LY_PREF_SCHEMA_RESOLVED, when->prefixes,
when->context, &tmp_set, LYXP_SCNODE_SCHEMA);
if (ret != LY_SUCCESS) {
LOGVAL(set->ctx, LYVE_SEMANTICS, "Invalid when condition \"%s\".", when->cond->expr);
goto cleanup;
}
for (j = 0; j < tmp_set.used; ++j) {
/* skip roots'n'stuff */
if (tmp_set.val.scnodes[j].type == LYXP_NODE_ELEM) {
/* try to find this node in our set */
uint32_t idx;
if (lyxp_set_scnode_contains(set, tmp_set.val.scnodes[j].scnode, LYXP_NODE_ELEM, -1, &idx) &&
(set->val.scnodes[idx].in_ctx == LYXP_SET_SCNODE_START_USED)) {
LOGVAL(set->ctx, LYVE_SEMANTICS, "When condition includes a self-reference.");
ret = LY_EVALID;
goto cleanup;
}
/* needs to be checked, if in both sets, will be ignored */
tmp_set.val.scnodes[j].in_ctx = LYXP_SET_SCNODE_ATOM_CTX;
} else {
/* no when, nothing to check */
tmp_set.val.scnodes[j].in_ctx = LYXP_SET_SCNODE_ATOM;
}
}
/* merge this set into the global when set */
lyxp_set_scnode_merge(set, &tmp_set);
}
/* check when of non-data parents as well */
node = node->parent;
LOG_LOCBACK(1, 0, 0, 0);
} while (node && (node->nodetype & (LYS_CASE | LYS_CHOICE)));
/* this node when was checked (xp_scnode could have been reallocd) */
set->val.scnodes[i].in_ctx = LYXP_SET_SCNODE_START_USED;
}
cleanup:
lyxp_set_free_content(&tmp_set);
return ret;
}
LY_ERR
lysc_check_status(struct lysc_ctx *ctx, uint16_t flags1, void *mod1, const char *name1, uint16_t flags2, void *mod2,
const char *name2)
{
uint16_t flg1, flg2;
flg1 = (flags1 & LYS_STATUS_MASK) ? (flags1 & LYS_STATUS_MASK) : LYS_STATUS_CURR;
flg2 = (flags2 & LYS_STATUS_MASK) ? (flags2 & LYS_STATUS_MASK) : LYS_STATUS_CURR;
if ((flg1 < flg2) && (mod1 == mod2)) {
if (ctx) {
LOGVAL(ctx->ctx, LYVE_REFERENCE,
"A %s definition \"%s\" is not allowed to reference %s definition \"%s\".",
flg1 == LYS_STATUS_CURR ? "current" : "deprecated", name1,
flg2 == LYS_STATUS_OBSLT ? "obsolete" : "deprecated", name2);
}
return LY_EVALID;
}
return LY_SUCCESS;
}
LY_ERR
lys_compile_expr_implement(const struct ly_ctx *ctx, const struct lyxp_expr *expr, LY_PREFIX_FORMAT format,
void *prefix_data, ly_bool implement, struct lys_glob_unres *unres, const struct lys_module **mod_p)
{
uint32_t i;
const char *ptr, *start;
const struct lys_module *mod;
assert(implement || mod_p);
for (i = 0; i < expr->used; ++i) {
if ((expr->tokens[i] != LYXP_TOKEN_NAMETEST) && (expr->tokens[i] != LYXP_TOKEN_LITERAL)) {
/* token cannot have a prefix */
continue;
}
start = expr->expr + expr->tok_pos[i];
if (!(ptr = ly_strnchr(start, ':', expr->tok_len[i]))) {
/* token without a prefix */
continue;
}
if (!(mod = ly_resolve_prefix(ctx, start, ptr - start, format, prefix_data))) {
/* unknown prefix, do not care right now */
continue;
}
if (!mod->implemented) {
/* unimplemented module found */
if (implement) {
LY_CHECK_RET(lys_set_implemented_r((struct lys_module *)mod, NULL, unres));
} else {
*mod_p = mod;
break;
}
}
}
return LY_SUCCESS;
}
/**
* @brief Check when/must expressions of a node on a complete compiled schema tree.
*
* @param[in] ctx Compile context.
* @param[in] node Node to check.
* @param[in,out] unres Global unres structure.
* @return LY_ERR value
*/
static LY_ERR
lys_compile_unres_xpath(struct lysc_ctx *ctx, const struct lysc_node *node, struct lys_glob_unres *unres)
{
struct lyxp_set tmp_set;
uint32_t i, opts;
LY_ARRAY_COUNT_TYPE u;
ly_bool input_done = 0;
struct lysc_when **whens = NULL;
struct lysc_must *musts = NULL;
LY_ERR ret = LY_SUCCESS;
const struct lys_module *mod;
LOG_LOCSET(node, NULL, NULL, NULL);
memset(&tmp_set, 0, sizeof tmp_set);
opts = LYXP_SCNODE_SCHEMA | ((node->flags & LYS_IS_OUTPUT) ? LYXP_SCNODE_OUTPUT : 0);
whens = lysc_node_when(node);
musts = lysc_node_musts(node);
LY_ARRAY_FOR(whens, u) {
/* first check whether all the referenced modules are implemented */
mod = NULL;
ret = lys_compile_expr_implement(ctx->ctx, whens[u]->cond, LY_PREF_SCHEMA_RESOLVED, whens[u]->prefixes,
ctx->ctx->flags & LY_CTX_REF_IMPLEMENTED, unres, &mod);
if (ret) {
goto cleanup;
} else if (mod) {
LOGWRN(ctx->ctx, "When condition \"%s\" check skipped because referenced module \"%s\" is not implemented.",
whens[u]->cond->expr, mod->name);
continue;
}
/* check "when" */
ret = lyxp_atomize(ctx->ctx, whens[u]->cond, node->module, LY_PREF_SCHEMA_RESOLVED, whens[u]->prefixes,
whens[u]->context, &tmp_set, opts);
if (ret) {
LOGVAL(ctx->ctx, LYVE_SEMANTICS, "Invalid when condition \"%s\".", whens[u]->cond->expr);
goto cleanup;
}
ctx->path[0] = '\0';
lysc_path(node, LYSC_PATH_LOG, ctx->path, LYSC_CTX_BUFSIZE);
for (i = 0; i < tmp_set.used; ++i) {
/* skip roots'n'stuff */
if ((tmp_set.val.scnodes[i].type == LYXP_NODE_ELEM) && (tmp_set.val.scnodes[i].in_ctx != LYXP_SET_SCNODE_START_USED)) {
struct lysc_node *schema = tmp_set.val.scnodes[i].scnode;
/* XPath expression cannot reference "lower" status than the node that has the definition */
ret = lysc_check_status(ctx, whens[u]->flags, node->module, node->name, schema->flags, schema->module,
schema->name);
LY_CHECK_GOTO(ret, cleanup);
/* check dummy node accessing */
if (schema == node) {
LOGVAL(ctx->ctx, LYVE_SEMANTICS, "When condition is accessing its own conditional node.");
ret = LY_EVALID;
goto cleanup;
}
}
}
/* check cyclic dependencies */
ret = lys_compile_unres_when_cyclic(&tmp_set, node);
LY_CHECK_GOTO(ret, cleanup);
lyxp_set_free_content(&tmp_set);
}
check_musts:
LY_ARRAY_FOR(musts, u) {
/* first check whether all the referenced modules are implemented */
mod = NULL;
ret = lys_compile_expr_implement(ctx->ctx, musts[u].cond, LY_PREF_SCHEMA_RESOLVED, musts[u].prefixes,
ctx->ctx->flags & LY_CTX_REF_IMPLEMENTED, unres, &mod);
if (ret) {
goto cleanup;
} else if (mod) {
LOGWRN(ctx->ctx, "Must condition \"%s\" check skipped because referenced module \"%s\" is not implemented.",
musts[u].cond->expr, mod->name);
continue;
}
/* check "must" */
ret = lyxp_atomize(ctx->ctx, musts[u].cond, node->module, LY_PREF_SCHEMA_RESOLVED, musts[u].prefixes, node,
&tmp_set, opts);
if (ret) {
LOGVAL(ctx->ctx, LYVE_SEMANTICS, "Invalid must restriction \"%s\".", musts[u].cond->expr);
goto cleanup;
}
ctx->path[0] = '\0';
lysc_path(node, LYSC_PATH_LOG, ctx->path, LYSC_CTX_BUFSIZE);
for (i = 0; i < tmp_set.used; ++i) {
/* skip roots'n'stuff */
if (tmp_set.val.scnodes[i].type == LYXP_NODE_ELEM) {
/* XPath expression cannot reference "lower" status than the node that has the definition */
ret = lysc_check_status(ctx, node->flags, node->module, node->name, tmp_set.val.scnodes[i].scnode->flags,
tmp_set.val.scnodes[i].scnode->module, tmp_set.val.scnodes[i].scnode->name);
LY_CHECK_GOTO(ret, cleanup);
}
}
lyxp_set_free_content(&tmp_set);
}
if ((node->nodetype & (LYS_RPC | LYS_ACTION)) && !input_done) {
/* now check output musts */
input_done = 1;
whens = NULL;
musts = ((struct lysc_node_action *)node)->output.musts;
opts = LYXP_SCNODE_OUTPUT;
goto check_musts;
}
cleanup:
lyxp_set_free_content(&tmp_set);
LOG_LOCBACK(1, 0, 0, 0);
return ret;
}
/**
* @brief Check leafref for its target existence on a complete compiled schema tree.
*
* @param[in] ctx Compile context.
* @param[in] node Context node for the leafref.
* @param[in] lref Leafref to check/resolve.
* @param[in,out] unres Global unres structure.
* @return LY_ERR value.
*/
static LY_ERR
lys_compile_unres_leafref(struct lysc_ctx *ctx, const struct lysc_node *node, struct lysc_type_leafref *lref,
struct lys_glob_unres *unres)
{
const struct lysc_node *target = NULL;
struct ly_path *p;
struct lysc_type *type;
assert(node->nodetype & (LYS_LEAF | LYS_LEAFLIST));
/* try to find the target */
LY_CHECK_RET(ly_path_compile(ctx->ctx, lref->cur_mod, node, NULL, lref->path, LY_PATH_LREF_TRUE,
(node->flags & LYS_IS_OUTPUT) ? LY_PATH_OPER_OUTPUT : LY_PATH_OPER_INPUT, LY_PATH_TARGET_MANY,
LY_PREF_SCHEMA_RESOLVED, lref->prefixes, unres, &p));
/* get the target node */
target = p[LY_ARRAY_COUNT(p) - 1].node;
ly_path_free(node->module->ctx, p);
if (!(target->nodetype & (LYS_LEAF | LYS_LEAFLIST))) {
LOGVAL(ctx->ctx, LYVE_REFERENCE, "Invalid leafref path \"%s\" - target node is %s instead of leaf or leaf-list.",
lref->path->expr, lys_nodetype2str(target->nodetype));
return LY_EVALID;
}
/* check status */
ctx->path[0] = '\0';
lysc_path(node, LYSC_PATH_LOG, ctx->path, LYSC_CTX_BUFSIZE);
ctx->path_len = strlen(ctx->path);