blob: 7fb58df3b4696710a21ae6fdf26de21ed3057309 [file] [log] [blame]
/**
* @file context.c
* @author Radek Krejci <rkrejci@cesnet.cz>
* @author Michal Vasko <mvasko@cesnet.cz>
* @brief Context implementations
*
* Copyright (c) 2015 - 2021 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 /* asprintf, strdup */
#if defined (__NetBSD__) || defined (__OpenBSD__)
/* realpath */
#define _XOPEN_SOURCE 1
#define _XOPEN_SOURCE_EXTENDED 1
#endif
#include "context.h"
#include <assert.h>
#include <errno.h>
#include <pthread.h>
#include <stdarg.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <unistd.h>
#include "common.h"
#include "compat.h"
#include "hash_table.h"
#include "in.h"
#include "parser_data.h"
#include "plugins_internal.h"
#include "plugins_types.h"
#include "schema_compile.h"
#include "set.h"
#include "tree.h"
#include "tree_data.h"
#include "tree_data_internal.h"
#include "tree_schema.h"
#include "tree_schema_internal.h"
#include "../models/ietf-datastores@2018-02-14.h"
#include "../models/ietf-inet-types@2013-07-15.h"
#include "../models/ietf-yang-library@2019-01-04.h"
#include "../models/ietf-yang-metadata@2016-08-05.h"
#include "../models/ietf-yang-schema-mount@2019-01-14.h"
#include "../models/ietf-yang-types@2013-07-15.h"
#include "../models/yang@2021-04-07.h"
#define IETF_YANG_LIB_REV "2019-01-04"
static struct internal_modules_s {
const char *name;
const char *revision;
const char *data;
ly_bool implemented;
LYS_INFORMAT format;
} internal_modules[] = {
{"ietf-yang-metadata", "2016-08-05", (const char *)ietf_yang_metadata_2016_08_05_yang, 0, LYS_IN_YANG},
{"yang", "2021-04-07", (const char *)yang_2021_04_07_yang, 1, LYS_IN_YANG},
{"ietf-inet-types", "2013-07-15", (const char *)ietf_inet_types_2013_07_15_yang, 0, LYS_IN_YANG},
{"ietf-yang-types", "2013-07-15", (const char *)ietf_yang_types_2013_07_15_yang, 0, LYS_IN_YANG},
{"ietf-yang-schema-mount", "2019-01-14", (const char *)ietf_yang_schema_mount_2019_01_14_yang, 1, LYS_IN_YANG},
/* ietf-datastores and ietf-yang-library must be right here at the end of the list! */
{"ietf-datastores", "2018-02-14", (const char *)ietf_datastores_2018_02_14_yang, 1, LYS_IN_YANG},
{"ietf-yang-library", IETF_YANG_LIB_REV, (const char *)ietf_yang_library_2019_01_04_yang, 1, LYS_IN_YANG}
};
#define LY_INTERNAL_MODS_COUNT sizeof(internal_modules) / sizeof(struct internal_modules_s)
LIBYANG_API_DEF LY_ERR
ly_ctx_set_searchdir(struct ly_ctx *ctx, const char *search_dir)
{
struct stat st;
char *new_dir = NULL;
LY_CHECK_ARG_RET(ctx, ctx, LY_EINVAL);
if (search_dir) {
new_dir = realpath(search_dir, NULL);
LY_CHECK_ERR_RET(!new_dir,
LOGERR(ctx, LY_ESYS, "Unable to use search directory \"%s\" (%s).", search_dir, strerror(errno)),
LY_EINVAL);
if (strcmp(search_dir, new_dir)) {
LOGVRB("Search directory string \"%s\" canonized to \"%s\".", search_dir, new_dir);
}
LY_CHECK_ERR_RET(access(new_dir, R_OK | X_OK),
LOGERR(ctx, LY_ESYS, "Unable to fully access search directory \"%s\" (%s).", new_dir, strerror(errno)); free(new_dir),
LY_EINVAL);
LY_CHECK_ERR_RET(stat(new_dir, &st),
LOGERR(ctx, LY_ESYS, "stat() failed for \"%s\" (%s).", new_dir, strerror(errno)); free(new_dir),
LY_ESYS);
LY_CHECK_ERR_RET(!S_ISDIR(st.st_mode),
LOGERR(ctx, LY_ESYS, "Given search directory \"%s\" is not a directory.", new_dir); free(new_dir),
LY_EINVAL);
/* avoid path duplication */
for (uint32_t u = 0; u < ctx->search_paths.count; ++u) {
if (!strcmp(new_dir, ctx->search_paths.objs[u])) {
free(new_dir);
return LY_EEXIST;
}
}
if (ly_set_add(&ctx->search_paths, new_dir, 1, NULL)) {
free(new_dir);
return LY_EMEM;
}
/* new searchdir - possibly more latest revision available */
ly_ctx_reset_latests(ctx);
return LY_SUCCESS;
} else {
/* consider that no change is not actually an error */
return LY_SUCCESS;
}
}
LIBYANG_API_DEF const char * const *
ly_ctx_get_searchdirs(const struct ly_ctx *ctx)
{
#define LY_CTX_SEARCHDIRS_SIZE_STEP 8
void **new;
LY_CHECK_ARG_RET(ctx, ctx, NULL);
if (ctx->search_paths.count == ctx->search_paths.size) {
/* not enough space for terminating NULL byte */
new = realloc(((struct ly_ctx *)ctx)->search_paths.objs,
(ctx->search_paths.size + LY_CTX_SEARCHDIRS_SIZE_STEP) * sizeof *ctx->search_paths.objs);
LY_CHECK_ERR_RET(!new, LOGMEM(NULL), NULL);
((struct ly_ctx *)ctx)->search_paths.size += LY_CTX_SEARCHDIRS_SIZE_STEP;
((struct ly_ctx *)ctx)->search_paths.objs = new;
}
/* set terminating NULL byte to the strings list */
ctx->search_paths.objs[ctx->search_paths.count] = NULL;
return (const char * const *)ctx->search_paths.objs;
}
LIBYANG_API_DEF LY_ERR
ly_ctx_unset_searchdir(struct ly_ctx *ctx, const char *value)
{
LY_CHECK_ARG_RET(ctx, ctx, LY_EINVAL);
if (!ctx->search_paths.count) {
return LY_SUCCESS;
}
if (value) {
/* remove specific search directory */
uint32_t index;
for (index = 0; index < ctx->search_paths.count; ++index) {
if (!strcmp(value, ctx->search_paths.objs[index])) {
break;
}
}
if (index == ctx->search_paths.count) {
LOGARG(ctx, value);
return LY_EINVAL;
} else {
return ly_set_rm_index(&ctx->search_paths, index, free);
}
} else {
/* remove them all */
ly_set_erase(&ctx->search_paths, free);
memset(&ctx->search_paths, 0, sizeof ctx->search_paths);
}
return LY_SUCCESS;
}
LIBYANG_API_DEF LY_ERR
ly_ctx_unset_searchdir_last(struct ly_ctx *ctx, uint32_t count)
{
LY_CHECK_ARG_RET(ctx, ctx, LY_EINVAL);
for ( ; count > 0 && ctx->search_paths.count; --count) {
LY_CHECK_RET(ly_set_rm_index(&ctx->search_paths, ctx->search_paths.count - 1, free))
}
return LY_SUCCESS;
}
LIBYANG_API_DEF struct lys_module *
ly_ctx_load_module(struct ly_ctx *ctx, const char *name, const char *revision, const char **features)
{
struct lys_module *mod = NULL;
LY_ERR ret = LY_SUCCESS;
LY_CHECK_ARG_RET(ctx, ctx, name, NULL);
/* load and parse */
ret = lys_parse_load(ctx, name, revision, &ctx->unres.creating, &mod);
LY_CHECK_GOTO(ret, cleanup);
/* implement */
ret = _lys_set_implemented(mod, features, &ctx->unres);
LY_CHECK_GOTO(ret, cleanup);
if (!(ctx->flags & LY_CTX_EXPLICIT_COMPILE)) {
/* create dep set for the module and mark all the modules that will be (re)compiled */
LY_CHECK_GOTO(ret = lys_unres_dep_sets_create(ctx, &ctx->unres.dep_sets, mod), cleanup);
/* (re)compile the whole dep set (other dep sets will have no modules marked for compilation) */
LY_CHECK_GOTO(ret = lys_compile_depset_all(ctx, &ctx->unres), cleanup);
/* unres resolved */
lys_unres_glob_erase(&ctx->unres);
}
cleanup:
if (ret) {
lys_unres_glob_revert(ctx, &ctx->unres);
lys_unres_glob_erase(&ctx->unres);
mod = NULL;
}
return mod;
}
LIBYANG_API_DEF LY_ERR
ly_ctx_new(const char *search_dir, uint16_t options, struct ly_ctx **new_ctx)
{
struct ly_ctx *ctx = NULL;
struct lys_module *module;
char *search_dir_list, *sep, *dir;
const char **imp_f, *all_f[] = {"*", NULL};
uint32_t i;
struct ly_in *in = NULL;
LY_ERR rc = LY_SUCCESS;
struct lys_glob_unres unres = {0};
LY_CHECK_ARG_RET(NULL, new_ctx, LY_EINVAL);
ctx = calloc(1, sizeof *ctx);
LY_CHECK_ERR_GOTO(!ctx, LOGMEM(NULL); rc = LY_EMEM, cleanup);
/* dictionary */
lydict_init(&ctx->dict);
/* plugins */
LY_CHECK_ERR_GOTO(lyplg_init(), LOGINT(NULL); rc = LY_EINT, cleanup);
/* initialize thread-specific keys */
while ((pthread_key_create(&ctx->errlist_key, ly_err_free)) == EAGAIN) {}
/* init LYB hash lock */
pthread_mutex_init(&ctx->lyb_hash_lock, NULL);
/* models list */
ctx->flags = options;
if (search_dir) {
search_dir_list = strdup(search_dir);
LY_CHECK_ERR_GOTO(!search_dir_list, LOGMEM(NULL); rc = LY_EMEM, cleanup);
for (dir = search_dir_list; (sep = strchr(dir, PATH_SEPARATOR[0])) != NULL && rc == LY_SUCCESS; dir = sep + 1) {
*sep = 0;
rc = ly_ctx_set_searchdir(ctx, dir);
if (rc == LY_EEXIST) {
/* ignore duplication */
rc = LY_SUCCESS;
}
}
if (*dir && (rc == LY_SUCCESS)) {
rc = ly_ctx_set_searchdir(ctx, dir);
if (rc == LY_EEXIST) {
/* ignore duplication */
rc = LY_SUCCESS;
}
}
free(search_dir_list);
/* If ly_ctx_set_searchdir() failed, the error is already logged. Just exit */
LY_CHECK_GOTO(rc, cleanup);
}
ctx->change_count = 1;
if (!(options & LY_CTX_EXPLICIT_COMPILE)) {
/* use it for creating the initial context */
ctx->flags |= LY_CTX_EXPLICIT_COMPILE;
}
/* create dummy in */
rc = ly_in_new_memory(internal_modules[0].data, &in);
LY_CHECK_GOTO(rc, cleanup);
/* load internal modules */
for (i = 0; i < ((options & LY_CTX_NO_YANGLIBRARY) ? (LY_INTERNAL_MODS_COUNT - 2) : LY_INTERNAL_MODS_COUNT); i++) {
ly_in_memory(in, internal_modules[i].data);
LY_CHECK_GOTO(rc = lys_parse_in(ctx, in, internal_modules[i].format, NULL, NULL, &unres.creating, &module), cleanup);
if (internal_modules[i].implemented || (ctx->flags & LY_CTX_ALL_IMPLEMENTED)) {
imp_f = (ctx->flags & LY_CTX_ENABLE_IMP_FEATURES) ? all_f : NULL;
LY_CHECK_GOTO(rc = lys_implement(module, imp_f, &unres), cleanup);
}
}
if (!(options & LY_CTX_EXPLICIT_COMPILE)) {
/* compile now */
LY_CHECK_GOTO(rc = ly_ctx_compile(ctx), cleanup);
ctx->flags &= ~LY_CTX_EXPLICIT_COMPILE;
}
cleanup:
ly_in_free(in, 0);
lys_unres_glob_erase(&unres);
if (rc) {
ly_ctx_destroy(ctx);
} else {
*new_ctx = ctx;
}
return rc;
}
static LY_ERR
ly_ctx_new_yl_legacy(struct ly_ctx *ctx, const struct lyd_node *yltree)
{
struct lyd_node *module, *node;
struct ly_set *set;
const char **feature_arr = NULL;
const char *name = NULL, *revision = NULL;
struct ly_set features = {0};
ly_bool imported = 0;
const struct lys_module *mod;
LY_ERR ret = LY_SUCCESS;
uint32_t i, j;
LY_CHECK_RET(ret = lyd_find_xpath(yltree, "/ietf-yang-library:yang-library/modules-state/module", &set));
/* process the data tree */
for (i = 0; i < set->count; ++i) {
module = set->dnodes[i];
/* initiate */
revision = NULL;
name = NULL;
imported = 0;
LY_LIST_FOR(lyd_child(module), node) {
if (!strcmp(node->schema->name, "name")) {
name = lyd_get_value(node);
} else if (!strcmp(node->schema->name, "revision")) {
revision = lyd_get_value(node);
} else if (!strcmp(node->schema->name, "feature")) {
LY_CHECK_GOTO(ret = ly_set_add(&features, node, 0, NULL), cleanup);
} else if (!strcmp(node->schema->name, "conformance-type") &&
!strcmp(lyd_get_value(node), "import")) {
/* imported module - skip it, it will be loaded as a side effect
* of loading another module */
imported = 1;
break;
}
}
if (imported) {
continue;
}
feature_arr = malloc((features.count + 1) * sizeof *feature_arr);
LY_CHECK_ERR_GOTO(!feature_arr, ret = LY_EMEM, cleanup);
/* Parse features into an array of strings */
for (j = 0; j < features.count; ++j) {
feature_arr[j] = lyd_get_value(features.dnodes[j]);
}
feature_arr[features.count] = NULL;
ly_set_clean(&features, free);
/* use the gathered data to load the module */
mod = ly_ctx_load_module(ctx, name, revision, feature_arr);
free(feature_arr);
if (!mod) {
LOGERR(ctx, LY_EINVAL, "Unable to load module specified by yang library data.");
ly_set_free(set, free);
return LY_EINVAL;
}
}
cleanup:
ly_set_clean(&features, free);
ly_set_free(set, free);
return ret;
}
LIBYANG_API_DEF LY_ERR
ly_ctx_new_ylpath(const char *search_dir, const char *path, LYD_FORMAT format, int options, struct ly_ctx **ctx)
{
LY_ERR ret = LY_SUCCESS;
struct ly_ctx *ctx_yl = NULL;
struct lyd_node *data_yl = NULL;
LY_CHECK_ARG_RET(NULL, path, ctx, LY_EINVAL);
/* create a seperate context for the data */
LY_CHECK_GOTO(ret = ly_ctx_new(search_dir, 0, &ctx_yl), cleanup);
/* parse yang library data tree */
LY_CHECK_GOTO(ret = lyd_parse_data_path(ctx_yl, path, format, 0, LYD_VALIDATE_PRESENT, &data_yl), cleanup);
/* create the new context */
ret = ly_ctx_new_yldata(search_dir, data_yl, options, ctx);
cleanup:
lyd_free_all(data_yl);
ly_ctx_destroy(ctx_yl);
return ret;
}
LIBYANG_API_DEF LY_ERR
ly_ctx_new_ylmem(const char *search_dir, const char *data, LYD_FORMAT format, int options, struct ly_ctx **ctx)
{
LY_ERR ret = LY_SUCCESS;
struct ly_ctx *ctx_yl = NULL;
struct lyd_node *data_yl = NULL;
LY_CHECK_ARG_RET(NULL, data, ctx, LY_EINVAL);
/* create a seperate context for the data */
LY_CHECK_GOTO(ret = ly_ctx_new(search_dir, 0, &ctx_yl), cleanup);
/* parse yang library data tree */
LY_CHECK_GOTO(ret = lyd_parse_data_mem(ctx_yl, data, format, 0, LYD_VALIDATE_PRESENT, &data_yl), cleanup);
/* create the new context */
ret = ly_ctx_new_yldata(search_dir, data_yl, options, ctx);
cleanup:
lyd_free_all(data_yl);
ly_ctx_destroy(ctx_yl);
return ret;
}
LIBYANG_API_DEF LY_ERR
ly_ctx_new_yldata(const char *search_dir, const struct lyd_node *tree, int options, struct ly_ctx **ctx)
{
const char *name = NULL, *revision = NULL;
struct lyd_node *module, *node;
struct ly_set *set = NULL;
const char **feature_arr = NULL;
struct ly_set features = {0};
LY_ERR ret = LY_SUCCESS;
const struct lys_module *mod;
struct ly_ctx *ctx_new = NULL;
ly_bool no_expl_compile = 0;
uint32_t i, j;
LY_CHECK_ARG_RET(NULL, tree, ctx, LY_EINVAL);
/* create a new context */
LY_CHECK_GOTO(ret = ly_ctx_new(search_dir, options, &ctx_new), cleanup);
/* redundant to compile modules one-by-one */
if (!(options & LY_CTX_EXPLICIT_COMPILE)) {
ctx_new->flags |= LY_CTX_EXPLICIT_COMPILE;
no_expl_compile = 1;
}
LY_CHECK_GOTO(ret = lyd_find_xpath(tree, "/ietf-yang-library:yang-library/module-set[1]/module", &set), cleanup);
if (set->count == 0) {
/* perhaps a legacy data tree? */
LY_CHECK_GOTO(ret = ly_ctx_new_yl_legacy(ctx_new, tree), cleanup);
} else {
/* process the data tree */
for (i = 0; i < set->count; ++i) {
module = set->dnodes[i];
/* initiate */
name = NULL;
revision = NULL;
/* iterate over data */
LY_LIST_FOR(lyd_child(module), node) {
if (!strcmp(node->schema->name, "name")) {
name = lyd_get_value(node);
} else if (!strcmp(node->schema->name, "revision")) {
revision = lyd_get_value(node);
} else if (!strcmp(node->schema->name, "feature")) {
LY_CHECK_GOTO(ret = ly_set_add(&features, node, 0, NULL), cleanup);
}
}
feature_arr = malloc((features.count + 1) * sizeof *feature_arr);
LY_CHECK_ERR_GOTO(!feature_arr, ret = LY_EMEM, cleanup);
/* parse features into an array of strings */
for (j = 0; j < features.count; ++j) {
feature_arr[j] = lyd_get_value(features.dnodes[j]);
}
feature_arr[features.count] = NULL;
ly_set_clean(&features, NULL);
/* use the gathered data to load the module */
mod = ly_ctx_load_module(ctx_new, name, revision, feature_arr);
free(feature_arr);
if (!mod) {
LOGERR(NULL, LY_EINVAL, "Unable to load module %s@%s specified by yang library data.", name,
revision ? revision : "<none>");
ret = LY_EINVAL;
goto cleanup;
}
}
}
/* compile */
LY_CHECK_GOTO(ret = ly_ctx_compile(ctx_new), cleanup);
if (no_expl_compile) {
/* unset flag */
ctx_new->flags &= ~LY_CTX_EXPLICIT_COMPILE;
}
cleanup:
ly_set_free(set, NULL);
ly_set_erase(&features, NULL);
*ctx = ctx_new;
if (ret) {
ly_ctx_destroy(*ctx);
*ctx = NULL;
}
return ret;
}
LIBYANG_API_DEF LY_ERR
ly_ctx_compile(struct ly_ctx *ctx)
{
LY_ERR ret = LY_SUCCESS;
LY_CHECK_ARG_RET(NULL, ctx, LY_EINVAL);
/* create dep sets and mark all the modules that will be (re)compiled */
LY_CHECK_GOTO(ret = lys_unres_dep_sets_create(ctx, &ctx->unres.dep_sets, NULL), cleanup);
/* (re)compile all the dep sets */
LY_CHECK_GOTO(ret = lys_compile_depset_all(ctx, &ctx->unres), cleanup);
cleanup:
if (ret) {
/* revert changes of modules */
lys_unres_glob_revert(ctx, &ctx->unres);
}
lys_unres_glob_erase(&ctx->unres);
return ret;
}
LIBYANG_API_DEF uint16_t
ly_ctx_get_options(const struct ly_ctx *ctx)
{
LY_CHECK_ARG_RET(ctx, ctx, 0);
return ctx->flags;
}
LIBYANG_API_DEF LY_ERR
ly_ctx_set_options(struct ly_ctx *ctx, uint16_t option)
{
LY_ERR lyrc = LY_SUCCESS;
struct lys_module *mod;
uint32_t i;
LY_CHECK_ARG_RET(ctx, ctx, LY_EINVAL);
LY_CHECK_ERR_RET((option & LY_CTX_NO_YANGLIBRARY) && !(ctx->flags & LY_CTX_NO_YANGLIBRARY),
LOGARG(ctx, option), LY_EINVAL);
if (!(ctx->flags & LY_CTX_SET_PRIV_PARSED) && (option & LY_CTX_SET_PRIV_PARSED)) {
ctx->flags |= LY_CTX_SET_PRIV_PARSED;
/* recompile the whole context to set the priv pointers */
for (i = 0; i < ctx->list.count; ++i) {
mod = ctx->list.objs[i];
if (mod->implemented) {
mod->to_compile = 1;
}
}
lyrc = ly_ctx_compile(ctx);
if (lyrc) {
ly_ctx_unset_options(ctx, LY_CTX_SET_PRIV_PARSED);
}
}
/* set the option(s) */
if (!lyrc) {
ctx->flags |= option;
}
return lyrc;
}
static LY_ERR
lysc_node_clear_priv_dfs_cb(struct lysc_node *node, void *UNUSED(data), ly_bool *UNUSED(dfs_continue))
{
node->priv = NULL;
return LY_SUCCESS;
}
static void
lysc_node_clear_all_priv(struct lys_module *mod)
{
LY_ARRAY_COUNT_TYPE u, v;
if (!mod->compiled) {
return;
}
/* set NULL for all ::lysc_node.priv pointers in module */
lysc_module_dfs_full(mod, lysc_node_clear_priv_dfs_cb, NULL);
/* only lys_compile_extension_instance()
* can set ::lysp_ext_instance.parsed
*/
if (mod->parsed) {
struct lysp_ext_instance *exts_p;
exts_p = mod->parsed->exts;
LY_ARRAY_FOR(exts_p, u) {
if (exts_p[u].parsed) {
/* lys_compile_extension_instance() was called */
struct lysc_ext_substmt *substmts;
struct lysc_node *root;
/* set NULL for all ::lysc_node.priv pointers in extensions */
substmts = mod->compiled->exts[u].substmts;
LY_ARRAY_FOR(substmts, v) {
root = *(struct lysc_node **)substmts[v].storage;
lysc_tree_dfs_full(root, lysc_node_clear_priv_dfs_cb, NULL);
}
}
}
}
}
LIBYANG_API_DEF LY_ERR
ly_ctx_unset_options(struct ly_ctx *ctx, uint16_t option)
{
LY_CHECK_ARG_RET(ctx, ctx, LY_EINVAL);
LY_CHECK_ERR_RET(option & LY_CTX_NO_YANGLIBRARY, LOGARG(ctx, option), LY_EINVAL);
if ((ctx->flags & LY_CTX_SET_PRIV_PARSED) && (option & LY_CTX_SET_PRIV_PARSED)) {
struct lys_module *mod;
uint32_t index;
index = 0;
while ((mod = ly_ctx_get_module_iter(ctx, &index))) {
lysc_node_clear_all_priv(mod);
}
}
/* unset the option(s) */
ctx->flags &= ~option;
return LY_SUCCESS;
}
LIBYANG_API_DEF uint16_t
ly_ctx_get_change_count(const struct ly_ctx *ctx)
{
LY_CHECK_ARG_RET(ctx, ctx, 0);
return ctx->change_count;
}
LIBYANG_API_DEF ly_module_imp_clb
ly_ctx_get_module_imp_clb(const struct ly_ctx *ctx, void **user_data)
{
LY_CHECK_ARG_RET(ctx, ctx, NULL);
if (user_data) {
*user_data = ctx->imp_clb_data;
}
return ctx->imp_clb;
}
LIBYANG_API_DEF void
ly_ctx_set_module_imp_clb(struct ly_ctx *ctx, ly_module_imp_clb clb, void *user_data)
{
LY_CHECK_ARG_RET(ctx, ctx, );
ctx->imp_clb = clb;
ctx->imp_clb_data = user_data;
}
LIBYANG_API_DEF ly_ext_data_clb
ly_ctx_set_ext_data_clb(struct ly_ctx *ctx, ly_ext_data_clb clb, void *user_data)
{
ly_ext_data_clb prev;
LY_CHECK_ARG_RET(ctx, ctx, NULL);
prev = ctx->ext_clb;
ctx->ext_clb = clb;
ctx->ext_clb_data = user_data;
return prev;
}
LIBYANG_API_DEF struct lys_module *
ly_ctx_get_module_iter(const struct ly_ctx *ctx, uint32_t *index)
{
LY_CHECK_ARG_RET(ctx, ctx, index, NULL);
if (*index < ctx->list.count) {
return ctx->list.objs[(*index)++];
} else {
return NULL;
}
}
/**
* @brief Iterate over the modules in the given context. Returned modules must match the given key at the offset of
* lysp_module and lysc_module structures (they are supposed to be placed at the same offset in both structures).
*
* @param[in] ctx Context where to iterate.
* @param[in] key Key value to search for.
* @param[in] key_size Optional length of the @p key. If zero, NULL-terminated key is expected.
* @param[in] key_offset Key's offset in struct lys_module to get value from the context's modules to match with the key.
* @param[in,out] Iterator to pass between the function calls. On the first call, the variable is supposed to be
* initiated to 0. After each call returning a module, the value is greater by 1 than the index of the returned
* module in the context.
* @return Module matching the given key, NULL if no such module found.
*/
static struct lys_module *
ly_ctx_get_module_by_iter(const struct ly_ctx *ctx, const char *key, size_t key_size, size_t key_offset, uint32_t *index)
{
struct lys_module *mod;
const char *value;
for ( ; *index < ctx->list.count; ++(*index)) {
mod = ctx->list.objs[*index];
value = *(const char **)(((int8_t *)(mod)) + key_offset);
if ((!key_size && !strcmp(key, value)) || (key_size && !strncmp(key, value, key_size) && (value[key_size] == '\0'))) {
/* increment index for the next run */
++(*index);
return mod;
}
}
/* done */
return NULL;
}
/**
* @brief Unifying function for ly_ctx_get_module() and ly_ctx_get_module_ns()
* @param[in] ctx Context where to search.
* @param[in] key Name or Namespace as a search key.
* @param[in] key_offset Key's offset in struct lys_module to get value from the context's modules to match with the key.
* @param[in] revision Revision date to match. If NULL, the matching module must have no revision. To search for the latest
* revision module, use ly_ctx_get_module_latest_by().
* @return Matching module if any.
*/
static struct lys_module *
ly_ctx_get_module_by(const struct ly_ctx *ctx, const char *key, size_t key_offset, const char *revision)
{
struct lys_module *mod;
uint32_t index = 0;
while ((mod = ly_ctx_get_module_by_iter(ctx, key, 0, key_offset, &index))) {
if (!revision) {
if (!mod->revision) {
/* found requested module without revision */
return mod;
}
} else {
if (mod->revision && !strcmp(mod->revision, revision)) {
/* found requested module of the specific revision */
return mod;
}
}
}
return NULL;
}
LIBYANG_API_DEF struct lys_module *
ly_ctx_get_module_ns(const struct ly_ctx *ctx, const char *ns, const char *revision)
{
LY_CHECK_ARG_RET(ctx, ctx, ns, NULL);
return ly_ctx_get_module_by(ctx, ns, offsetof(struct lys_module, ns), revision);
}
LIBYANG_API_DEF struct lys_module *
ly_ctx_get_module(const struct ly_ctx *ctx, const char *name, const char *revision)
{
LY_CHECK_ARG_RET(ctx, ctx, name, NULL);
return ly_ctx_get_module_by(ctx, name, offsetof(struct lys_module, name), revision);
}
/**
* @brief Unifying function for ly_ctx_get_module_latest() and ly_ctx_get_module_latest_ns()
* @param[in] ctx Context where to search.
* @param[in] key Name or Namespace as a search key.
* @param[in] key_offset Key's offset in struct lys_module to get value from the context's modules to match with the key.
* @return Matching module if any.
*/
static struct lys_module *
ly_ctx_get_module_latest_by(const struct ly_ctx *ctx, const char *key, size_t key_offset)
{
struct lys_module *mod;
uint32_t index = 0;
while ((mod = ly_ctx_get_module_by_iter(ctx, key, 0, key_offset, &index))) {
if (mod->latest_revision & LYS_MOD_LATEST_REV) {
return mod;
}
}
return NULL;
}
LIBYANG_API_DEF struct lys_module *
ly_ctx_get_module_latest(const struct ly_ctx *ctx, const char *name)
{
LY_CHECK_ARG_RET(ctx, ctx, name, NULL);
return ly_ctx_get_module_latest_by(ctx, name, offsetof(struct lys_module, name));
}
LIBYANG_API_DEF struct lys_module *
ly_ctx_get_module_latest_ns(const struct ly_ctx *ctx, const char *ns)
{
LY_CHECK_ARG_RET(ctx, ctx, ns, NULL);
return ly_ctx_get_module_latest_by(ctx, ns, offsetof(struct lys_module, ns));
}
/**
* @brief Unifying function for ly_ctx_get_module_implemented() and ly_ctx_get_module_implemented_ns()
* @param[in] ctx Context where to search.
* @param[in] key Name or Namespace as a search key.
* @param[in] key_size Optional length of the @p key. If zero, NULL-terminated key is expected.
* @param[in] key_offset Key's offset in struct lys_module to get value from the context's modules to match with the key.
* @return Matching module if any.
*/
static struct lys_module *
ly_ctx_get_module_implemented_by(const struct ly_ctx *ctx, const char *key, size_t key_size, size_t key_offset)
{
struct lys_module *mod;
uint32_t index = 0;
while ((mod = ly_ctx_get_module_by_iter(ctx, key, key_size, key_offset, &index))) {
if (mod->implemented) {
return mod;
}
}
return NULL;
}
LIBYANG_API_DEF struct lys_module *
ly_ctx_get_module_implemented(const struct ly_ctx *ctx, const char *name)
{
LY_CHECK_ARG_RET(ctx, ctx, name, NULL);
return ly_ctx_get_module_implemented_by(ctx, name, 0, offsetof(struct lys_module, name));
}
struct lys_module *
ly_ctx_get_module_implemented2(const struct ly_ctx *ctx, const char *name, size_t name_len)
{
LY_CHECK_ARG_RET(ctx, ctx, name, NULL);
return ly_ctx_get_module_implemented_by(ctx, name, name_len, offsetof(struct lys_module, name));
}
LIBYANG_API_DEF struct lys_module *
ly_ctx_get_module_implemented_ns(const struct ly_ctx *ctx, const char *ns)
{
LY_CHECK_ARG_RET(ctx, ctx, ns, NULL);
return ly_ctx_get_module_implemented_by(ctx, ns, 0, offsetof(struct lys_module, ns));
}
/**
* @brief Try to find a submodule in a module.
*
* @param[in] module Module where to search in.
* @param[in] submodule Name of the submodule to find.
* @param[in] revision Revision of the submodule to find. NULL for submodule with no revision.
* @param[in] latest Ignore @p revision and look for the latest revision.
* @return Pointer to the specified submodule if it is present in the context.
*/
static const struct lysp_submodule *
_ly_ctx_get_submodule2(const struct lys_module *module, const char *submodule, const char *revision, ly_bool latest)
{
struct lysp_include *inc;
LY_ARRAY_COUNT_TYPE u;
LY_CHECK_ARG_RET(NULL, module, module->parsed, submodule, NULL);
LY_ARRAY_FOR(module->parsed->includes, u) {
if (module->parsed->includes[u].submodule && !strcmp(submodule, module->parsed->includes[u].submodule->name)) {
inc = &module->parsed->includes[u];
if (latest && inc->submodule->latest_revision) {
/* latest revision */
return inc->submodule;
} else if (!revision && !inc->submodule->revs) {
/* no revision */
return inc->submodule;
} else if (revision && inc->submodule->revs && !strcmp(revision, inc->submodule->revs[0].date)) {
/* specific revision */
return inc->submodule;
}
}
}
return NULL;
}
/**
* @brief Try to find a submodule in the context.
*
* @param[in] ctx Context where to search in.
* @param[in] submodule Name of the submodule to find.
* @param[in] revision Revision of the submodule to find. NULL for submodule with no revision.
* @param[in] latest Ignore @p revision and look for the latest revision.
* @return Pointer to the specified submodule if it is present in the context.
*/
static const struct lysp_submodule *
_ly_ctx_get_submodule(const struct ly_ctx *ctx, const char *submodule, const char *revision, ly_bool latest)
{
const struct lys_module *mod;
const struct lysp_submodule *submod = NULL;
uint32_t v;
LY_CHECK_ARG_RET(ctx, ctx, submodule, NULL);
for (v = 0; v < ctx->list.count; ++v) {
mod = ctx->list.objs[v];
if (!mod->parsed) {
continue;
}
submod = _ly_ctx_get_submodule2(mod, submodule, revision, latest);
if (submod) {
break;
}
}
return submod;
}
LIBYANG_API_DEF const struct lysp_submodule *
ly_ctx_get_submodule(const struct ly_ctx *ctx, const char *submodule, const char *revision)
{
return _ly_ctx_get_submodule(ctx, submodule, revision, 0);
}
LIBYANG_API_DEF const struct lysp_submodule *
ly_ctx_get_submodule_latest(const struct ly_ctx *ctx, const char *submodule)
{
return _ly_ctx_get_submodule(ctx, submodule, NULL, 1);
}
LIBYANG_API_DEF const struct lysp_submodule *
ly_ctx_get_submodule2(const struct lys_module *module, const char *submodule, const char *revision)
{
return _ly_ctx_get_submodule2(module, submodule, revision, 0);
}
LIBYANG_API_DEF const struct lysp_submodule *
ly_ctx_get_submodule2_latest(const struct lys_module *module, const char *submodule)
{
return _ly_ctx_get_submodule2(module, submodule, NULL, 1);
}
LIBYANG_API_DEF void
ly_ctx_reset_latests(struct ly_ctx *ctx)
{
struct lys_module *mod;
for (uint32_t v = 0; v < ctx->list.count; ++v) {
mod = ctx->list.objs[v];
mod->latest_revision &= ~(LYS_MOD_LATEST_SEARCHDIRS | LYS_MOD_LATEST_IMPCLB);
if (mod->parsed && mod->parsed->includes) {
for (LY_ARRAY_COUNT_TYPE u = 0; u < LY_ARRAY_COUNT(mod->parsed->includes); ++u) {
mod->parsed->includes[u].submodule->latest_revision &= ~(LYS_MOD_LATEST_SEARCHDIRS | LYS_MOD_LATEST_IMPCLB);
}
}
}
}
LIBYANG_API_DEF uint32_t
ly_ctx_internal_modules_count(const struct ly_ctx *ctx)
{
if (!ctx) {
return 0;
}
if (ctx->flags & LY_CTX_NO_YANGLIBRARY) {
return LY_INTERNAL_MODS_COUNT - 2;
} else {
return LY_INTERNAL_MODS_COUNT;
}
}
static LY_ERR
ylib_feature(struct lyd_node *parent, const struct lysp_module *pmod)
{
LY_ARRAY_COUNT_TYPE u;
struct lysp_feature *f;
if (!pmod->mod->implemented) {
/* no features can be enabled */
return LY_SUCCESS;
}
LY_ARRAY_FOR(pmod->features, struct lysp_feature, f) {
if (!(f->flags & LYS_FENABLED)) {
continue;
}
LY_CHECK_RET(lyd_new_term(parent, NULL, "feature", f->name, 0, NULL));
}
LY_ARRAY_FOR(pmod->includes, u) {
LY_ARRAY_FOR(pmod->includes[u].submodule->features, struct lysp_feature, f) {
if (!(f->flags & LYS_FENABLED)) {
continue;
}
LY_CHECK_RET(lyd_new_term(parent, NULL, "feature", f->name, 0, NULL));
}
}
return LY_SUCCESS;
}
static LY_ERR
ylib_deviation(struct lyd_node *parent, const struct lys_module *cur_mod, ly_bool bis)
{
LY_ARRAY_COUNT_TYPE i;
struct lys_module *mod;
if (!cur_mod->implemented) {
/* no deviations of the module for certain */
return LY_SUCCESS;
}
LY_ARRAY_FOR(cur_mod->deviated_by, i) {
mod = cur_mod->deviated_by[i];
if (bis) {
LY_CHECK_RET(lyd_new_term(parent, NULL, "deviation", mod->name, 0, NULL));
} else {
LY_CHECK_RET(lyd_new_list(parent, NULL, "deviation", 0, NULL, mod->name,
(mod->parsed->revs ? mod->parsed->revs[0].date : "")));
}
}
return LY_SUCCESS;
}
static LY_ERR
ylib_submodules(struct lyd_node *parent, const struct lysp_module *pmod, ly_bool bis)
{
LY_ERR ret;
LY_ARRAY_COUNT_TYPE i;
struct lyd_node *cont;
struct lysp_submodule *submod;
int r;
char *str;
LY_ARRAY_FOR(pmod->includes, i) {
submod = pmod->includes[i].submodule;
if (bis) {
LY_CHECK_RET(lyd_new_list(parent, NULL, "submodule", 0, &cont, submod->name));
if (submod->revs) {
LY_CHECK_RET(lyd_new_term(cont, NULL, "revision", submod->revs[0].date, 0, NULL));
}
} else {
LY_CHECK_RET(lyd_new_list(parent, NULL, "submodule", 0, &cont, submod->name,
(submod->revs ? submod->revs[0].date : "")));
}
if (submod->filepath) {
r = asprintf(&str, "file://%s", submod->filepath);
LY_CHECK_ERR_RET(r == -1, LOGMEM(pmod->mod->ctx), LY_EMEM);
ret = lyd_new_term(cont, NULL, bis ? "location" : "schema", str, 0, NULL);
free(str);
LY_CHECK_RET(ret);
}
}
return LY_SUCCESS;
}
LIBYANG_API_DEF LY_ERR
ly_ctx_get_yanglib_data(const struct ly_ctx *ctx, struct lyd_node **root_p, const char *content_id_format, ...)
{
LY_ERR ret;
uint32_t i;
ly_bool bis = 0;
int r;
char *str;
const struct lys_module *mod;
struct lyd_node *root = NULL, *root_bis = NULL, *cont, *set_bis = NULL;
va_list ap;
LY_CHECK_ARG_RET(ctx, ctx, root_p, LY_EINVAL);
mod = ly_ctx_get_module_implemented(ctx, "ietf-yang-library");
LY_CHECK_ERR_RET(!mod, LOGERR(ctx, LY_EINVAL, "Module \"ietf-yang-library\" is not implemented."), LY_EINVAL);
if (mod->parsed->revs && !strcmp(mod->parsed->revs[0].date, "2016-06-21")) {
bis = 0;
} else if (mod->parsed->revs && !strcmp(mod->parsed->revs[0].date, IETF_YANG_LIB_REV)) {
bis = 1;
} else {
LOGERR(ctx, LY_EINVAL, "Incompatible ietf-yang-library version in context.");
return LY_EINVAL;
}
LY_CHECK_GOTO(ret = lyd_new_inner(NULL, mod, "modules-state", 0, &root), error);
if (bis) {
LY_CHECK_GOTO(ret = lyd_new_inner(NULL, mod, "yang-library", 0, &root_bis), error);
LY_CHECK_GOTO(ret = lyd_new_list(root_bis, NULL, "module-set", 0, &set_bis, "complete"), error);
}
for (i = 0; i < ctx->list.count; ++i) {
mod = ctx->list.objs[i];
if (!mod->parsed) {
LOGERR(ctx, LY_ENOTFOUND, "Parsed module \"%s\" missing in the context.", mod->name);
goto error;
}
/*
* deprecated legacy
*/
LY_CHECK_GOTO(ret = lyd_new_list(root, NULL, "module", 0, &cont, mod->name,
(mod->parsed->revs ? mod->parsed->revs[0].date : "")), error);
/* schema */
if (mod->filepath) {
r = asprintf(&str, "file://%s", mod->filepath);
LY_CHECK_ERR_GOTO(r == -1, LOGMEM(ctx); ret = LY_EMEM, error);
ret = lyd_new_term(cont, NULL, "schema", str, 0, NULL);
free(str);
LY_CHECK_GOTO(ret, error);
}
/* namespace */
LY_CHECK_GOTO(ret = lyd_new_term(cont, NULL, "namespace", mod->ns, 0, NULL), error);
/* feature leaf-list */
LY_CHECK_GOTO(ret = ylib_feature(cont, mod->parsed), error);
/* deviation list */
LY_CHECK_GOTO(ret = ylib_deviation(cont, mod, 0), error);
/* conformance-type */
LY_CHECK_GOTO(ret = lyd_new_term(cont, NULL, "conformance-type", mod->implemented ? "implement" : "import", 0,
NULL), error);
/* submodule list */
LY_CHECK_GOTO(ret = ylib_submodules(cont, mod->parsed, 0), error);
/*
* current revision
*/
if (bis) {
/* name and revision */
if (mod->implemented) {
LY_CHECK_GOTO(ret = lyd_new_list(set_bis, NULL, "module", 0, &cont, mod->name), error);
if (mod->parsed->revs) {
LY_CHECK_GOTO(ret = lyd_new_term(cont, NULL, "revision", mod->parsed->revs[0].date, 0, NULL), error);
}
} else {
LY_CHECK_GOTO(ret = lyd_new_list(set_bis, NULL, "import-only-module", 0, &cont, mod->name,
(mod->parsed->revs ? mod->parsed->revs[0].date : "")), error);
}
/* namespace */
LY_CHECK_GOTO(ret = lyd_new_term(cont, NULL, "namespace", mod->ns, 0, NULL), error);
/* location */
if (mod->filepath) {
r = asprintf(&str, "file://%s", mod->filepath);
LY_CHECK_ERR_GOTO(r == -1, LOGMEM(ctx); ret = LY_EMEM, error);
ret = lyd_new_term(cont, NULL, "location", str, 0, NULL);
free(str);
LY_CHECK_GOTO(ret, error);
}
/* submodule list */
LY_CHECK_GOTO(ret = ylib_submodules(cont, mod->parsed, 1), error);
/* feature list */
LY_CHECK_GOTO(ret = ylib_feature(cont, mod->parsed), error);
/* deviation */
LY_CHECK_GOTO(ret = ylib_deviation(cont, mod, 1), error);
}
}
/* IDs */
va_start(ap, content_id_format);
r = vasprintf(&str, content_id_format, ap);
va_end(ap);
LY_CHECK_ERR_GOTO(r == -1, LOGMEM(ctx); ret = LY_EMEM, error);
ret = lyd_new_term(root, NULL, "module-set-id", str, 0, NULL);
LY_CHECK_ERR_GOTO(ret, free(str), error);
if (bis) {
/* create one complete schema */
LY_CHECK_ERR_GOTO(ret = lyd_new_list(root_bis, NULL, "schema", 0, &cont, "complete"), free(str), error);
LY_CHECK_ERR_GOTO(ret = lyd_new_term(cont, NULL, "module-set", "complete", 0, NULL), free(str), error);
/* content-id */
LY_CHECK_ERR_GOTO(ret = lyd_new_term(root_bis, NULL, "content-id", str, 0, NULL), free(str), error);
}
free(str);
if (root_bis) {
if (lyd_insert_sibling(root, root_bis, &root)) {
goto error;
}
root_bis = NULL;
}
LY_CHECK_GOTO(ret = lyd_validate_all(&root, NULL, LYD_VALIDATE_PRESENT, NULL), error);
*root_p = root;
return LY_SUCCESS;
error:
lyd_free_all(root);
lyd_free_all(root_bis);
return ret;
}
LIBYANG_API_DEF void
ly_ctx_destroy(struct ly_ctx *ctx)
{
struct lys_module *mod;
if (!ctx) {
return;
}
/* models list */
for ( ; ctx->list.count; ctx->list.count--) {
mod = ctx->list.objs[ctx->list.count - 1];
/* remove the module */
if (mod->implemented) {
mod->implemented = 0;
lysc_module_free(mod->compiled);
mod->compiled = NULL;
}
lys_module_free(ctx->list.objs[ctx->list.count - 1], 0);
}
free(ctx->list.objs);
/* search paths list */
ly_set_erase(&ctx->search_paths, free);
/* leftover unres */
lys_unres_glob_erase(&ctx->unres);
/* clean the error list */
ly_err_clean(ctx, 0);
pthread_key_delete(ctx->errlist_key);
/* dictionary */
lydict_clean(&ctx->dict);
/* LYB hash lock */
pthread_mutex_destroy(&ctx->lyb_hash_lock);
/* plugins - will be removed only if this is the last context */
lyplg_clean();
free(ctx);
}