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gerrit.cesnet.cz / github / CESNET / libyang / 6892c273ba5896c55599489b05f4c1fabd3f9dbc / . / src / resolve.c
blob: 558dc55510db6d7778a21855edd45cd7a5035751 [file] [log] [blame]
/**
* @file resolve.c
* @author Michal Vasko <mvasko@cesnet.cz>
* @brief libyang resolve functions
*
* Copyright (c) 2015 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 <stdlib.h>
#include <assert.h>
#include <string.h>
#include <ctype.h>
#include <limits.h>
#include "libyang.h"
#include "resolve.h"
#include "common.h"
#include "xpath.h"
#include "parser.h"
#include "parser_yang.h"
#include "xml_internal.h"
#include "dict_private.h"
#include "tree_internal.h"
int
parse_range_dec64(const char **str_num, uint8_t dig, int64_t *num)
{
const char *ptr;
int minus = 0;
int64_t ret = 0;
int8_t str_exp, str_dig = -1;
ptr = *str_num;
if (ptr[0] == '-') {
minus = 1;
++ptr;
}
if (!isdigit(ptr[0])) {
/* there must be at least one */
return 1;
}
for (str_exp = 0; isdigit(ptr[0]) || ((ptr[0] == '.') && (str_dig < 0)); ++ptr) {
if (str_exp > 18) {
return 1;
}
if (ptr[0] == '.') {
if (ptr[1] == '.') {
/* it's the next interval */
break;
}
++str_dig;
} else {
ret = ret * 10 + (ptr[0] - 48);
if (str_dig > -1) {
++str_dig;
}
++str_exp;
}
}
if (str_dig == 0) {
/* no digits after '.' */
return 1;
} else if (str_dig == -1) {
/* there are 0 numbers after the floating point */
str_dig = 0;
}
/* it's parsed, now adjust the number based on fraction-digits, if needed */
if (str_dig < dig) {
if ((str_exp - 1) + (dig - str_dig) > 18) {
return 1;
}
ret *= dec_pow(dig - str_dig);
}
if (str_dig > dig) {
return 1;
}
if (minus) {
ret *= -1;
}
*str_num = ptr;
*num = ret;
return 0;
}
/**
* @brief Parse an identifier.
*
* ;; An identifier MUST NOT start with (('X'|'x') ('M'|'m') ('L'|'l'))
* identifier = (ALPHA / "_")
* *(ALPHA / DIGIT / "_" / "-" / ".")
*
* @param[in] id Identifier to use.
*
* @return Number of characters successfully parsed.
*/
int
parse_identifier(const char *id)
{
int parsed = 0;
assert(id);
if (!isalpha(id[0]) && (id[0] != '_')) {
return -parsed;
}
++parsed;
++id;
while (isalnum(id[0]) || (id[0] == '_') || (id[0] == '-') || (id[0] == '.')) {
++parsed;
++id;
}
return parsed;
}
/**
* @brief Parse a node-identifier.
*
* node-identifier = [module-name ":"] identifier
*
* @param[in] id Identifier to use.
* @param[out] mod_name Points to the module name, NULL if there is not any.
* @param[out] mod_name_len Length of the module name, 0 if there is not any.
* @param[out] name Points to the node name.
* @param[out] nam_len Length of the node name.
*
* @return Number of characters successfully parsed,
* positive on success, negative on failure.
*/
static int
parse_node_identifier(const char *id, const char **mod_name, int *mod_name_len, const char **name, int *nam_len)
{
int parsed = 0, ret;
assert(id);
if (mod_name) {
*mod_name = NULL;
}
if (mod_name_len) {
*mod_name_len = 0;
}
if (name) {
*name = NULL;
}
if (nam_len) {
*nam_len = 0;
}
if ((ret = parse_identifier(id)) < 1) {
return ret;
}
if (mod_name) {
*mod_name = id;
}
if (mod_name_len) {
*mod_name_len = ret;
}
parsed += ret;
id += ret;
/* there is prefix */
if (id[0] == ':') {
++parsed;
++id;
/* there isn't */
} else {
if (name && mod_name) {
*name = *mod_name;
}
if (mod_name) {
*mod_name = NULL;
}
if (nam_len && mod_name_len) {
*nam_len = *mod_name_len;
}
if (mod_name_len) {
*mod_name_len = 0;
}
return parsed;
}
/* identifier (node name) */
if ((ret = parse_identifier(id)) < 1) {
return -parsed+ret;
}
if (name) {
*name = id;
}
if (nam_len) {
*nam_len = ret;
}
return parsed+ret;
}
/**
* @brief Parse a path-predicate (leafref).
*
* path-predicate = "[" *WSP path-equality-expr *WSP "]"
* path-equality-expr = node-identifier *WSP "=" *WSP path-key-expr
*
* @param[in] id Identifier to use.
* @param[out] prefix Points to the prefix, NULL if there is not any.
* @param[out] pref_len Length of the prefix, 0 if there is not any.
* @param[out] name Points to the node name.
* @param[out] nam_len Length of the node name.
* @param[out] path_key_expr Points to the path-key-expr.
* @param[out] pke_len Length of the path-key-expr.
* @param[out] has_predicate Flag to mark whether there is another predicate following.
*
* @return Number of characters successfully parsed,
* positive on success, negative on failure.
*/
static int
parse_path_predicate(const char *id, const char **prefix, int *pref_len, const char **name, int *nam_len,
const char **path_key_expr, int *pke_len, int *has_predicate)
{
const char *ptr;
int parsed = 0, ret;
assert(id);
if (prefix) {
*prefix = NULL;
}
if (pref_len) {
*pref_len = 0;
}
if (name) {
*name = NULL;
}
if (nam_len) {
*nam_len = 0;
}
if (path_key_expr) {
*path_key_expr = NULL;
}
if (pke_len) {
*pke_len = 0;
}
if (has_predicate) {
*has_predicate = 0;
}
if (id[0] != '[') {
return -parsed;
}
++parsed;
++id;
while (isspace(id[0])) {
++parsed;
++id;
}
if ((ret = parse_node_identifier(id, prefix, pref_len, name, nam_len)) < 1) {
return -parsed+ret;
}
parsed += ret;
id += ret;
while (isspace(id[0])) {
++parsed;
++id;
}
if (id[0] != '=') {
return -parsed;
}
++parsed;
++id;
while (isspace(id[0])) {
++parsed;
++id;
}
if ((ptr = strchr(id, ']')) == NULL) {
return -parsed;
}
--ptr;
while (isspace(ptr[0])) {
--ptr;
}
++ptr;
ret = ptr-id;
if (path_key_expr) {
*path_key_expr = id;
}
if (pke_len) {
*pke_len = ret;
}
parsed += ret;
id += ret;
while (isspace(id[0])) {
++parsed;
++id;
}
assert(id[0] == ']');
if (id[1] == '[') {
*has_predicate = 1;
}
return parsed+1;
}
/**
* @brief Parse a path-key-expr (leafref). First call parses "current()", all
* the ".." and the first node-identifier, other calls parse a single
* node-identifier each.
*
* path-key-expr = current-function-invocation *WSP "/" *WSP
* rel-path-keyexpr
* rel-path-keyexpr = 1*(".." *WSP "/" *WSP)
* *(node-identifier *WSP "/" *WSP)
* node-identifier
*
* @param[in] id Identifier to use.
* @param[out] prefix Points to the prefix, NULL if there is not any.
* @param[out] pref_len Length of the prefix, 0 if there is not any.
* @param[out] name Points to the node name.
* @param[out] nam_len Length of the node name.
* @param[out] parent_times Number of ".." in the path. Must be 0 on the first call,
* must not be changed between consecutive calls.
* @return Number of characters successfully parsed,
* positive on success, negative on failure.
*/
static int
parse_path_key_expr(const char *id, const char **prefix, int *pref_len, const char **name, int *nam_len,
int *parent_times)
{
int parsed = 0, ret, par_times = 0;
assert(id);
assert(parent_times);
if (prefix) {
*prefix = NULL;
}
if (pref_len) {
*pref_len = 0;
}
if (name) {
*name = NULL;
}
if (nam_len) {
*nam_len = 0;
}
if (!*parent_times) {
/* current-function-invocation *WSP "/" *WSP rel-path-keyexpr */
if (strncmp(id, "current()", 9)) {
return -parsed;
}
parsed += 9;
id += 9;
while (isspace(id[0])) {
++parsed;
++id;
}
if (id[0] != '/') {
return -parsed;
}
++parsed;
++id;
while (isspace(id[0])) {
++parsed;
++id;
}
/* rel-path-keyexpr */
if (strncmp(id, "..", 2)) {
return -parsed;
}
++par_times;
parsed += 2;
id += 2;
while (isspace(id[0])) {
++parsed;
++id;
}
}
/* 1*(".." *WSP "/" *WSP) *(node-identifier *WSP "/" *WSP) node-identifier
*
* first parent reference with whitespaces already parsed
*/
if (id[0] != '/') {
return -parsed;
}
++parsed;
++id;
while (isspace(id[0])) {
++parsed;
++id;
}
while (!strncmp(id, "..", 2) && !*parent_times) {
++par_times;
parsed += 2;
id += 2;
while (isspace(id[0])) {
++parsed;
++id;
}
if (id[0] != '/') {
return -parsed;
}
++parsed;
++id;
while (isspace(id[0])) {
++parsed;
++id;
}
}
if (!*parent_times) {
*parent_times = par_times;
}
/* all parent references must be parsed at this point */
if ((ret = parse_node_identifier(id, prefix, pref_len, name, nam_len)) < 1) {
return -parsed+ret;
}
parsed += ret;
id += ret;
return parsed;
}
/**
* @brief Parse path-arg (leafref).
*
* path-arg = absolute-path / relative-path
* absolute-path = 1*("/" (node-identifier *path-predicate))
* relative-path = 1*(".." "/") descendant-path
*
* @param[in] id Identifier to use.
* @param[out] prefix Points to the prefix, NULL if there is not any.
* @param[out] pref_len Length of the prefix, 0 if there is not any.
* @param[out] name Points to the node name.
* @param[out] nam_len Length of the node name.
* @param[out] parent_times Number of ".." in the path. Must be 0 on the first call,
* must not be changed between consecutive calls. -1 if the
* path is relative.
* @param[out] has_predicate Flag to mark whether there is a predicate specified.
*
* @return Number of characters successfully parsed,
* positive on success, negative on failure.
*/
static int
parse_path_arg(const char *id, const char **prefix, int *pref_len, const char **name, int *nam_len, int *parent_times,
int *has_predicate)
{
int parsed = 0, ret, par_times = 0;
assert(id);
assert(parent_times);
if (prefix) {
*prefix = NULL;
}
if (pref_len) {
*pref_len = 0;
}
if (name) {
*name = NULL;
}
if (nam_len) {
*nam_len = 0;
}
if (has_predicate) {
*has_predicate = 0;
}
if (!*parent_times && !strncmp(id, "..", 2)) {
++par_times;
parsed += 2;
id += 2;
while (!strncmp(id, "/..", 3)) {
++par_times;
parsed += 3;
id += 3;
}
}
if (!*parent_times) {
if (par_times) {
*parent_times = par_times;
} else {
*parent_times = -1;
}
}
if (id[0] != '/') {
return -parsed;
}
/* skip '/' */
++parsed;
++id;
/* node-identifier ([prefix:]identifier) */
if ((ret = parse_node_identifier(id, prefix, pref_len, name, nam_len)) < 1) {
return -parsed-ret;
}
parsed += ret;
id += ret;
/* there is no predicate */
if ((id[0] == '/') || !id[0]) {
return parsed;
} else if (id[0] != '[') {
return -parsed;
}
if (has_predicate) {
*has_predicate = 1;
}
return parsed;
}
/**
* @brief Parse instance-identifier in JSON data format. That means that prefixes
* (which are mandatory for every node-identifier) are actually model names.
*
* instance-identifier = 1*("/" (node-identifier *predicate))
*
* @param[in] id Identifier to use.
* @param[out] model Points to the model name.
* @param[out] mod_len Length of the model name.
* @param[out] name Points to the node name.
* @param[out] nam_len Length of the node name.
* @param[out] has_predicate Flag to mark whether there is a predicate specified.
*
* @return Number of characters successfully parsed,
* positive on success, negative on failure.
*/
static int
parse_instance_identifier(const char *id, const char **model, int *mod_len, const char **name, int *nam_len,
int *has_predicate)
{
int parsed = 0, ret;
if (has_predicate) {
*has_predicate = 0;
}
if (id[0] != '/') {
return -parsed;
}
++parsed;
++id;
if ((ret = parse_identifier(id)) < 1) {
return ret;
}
*model = id;
*mod_len = ret;
parsed += ret;
id += ret;
if (id[0] != ':') {
return -parsed;
}
++parsed;
++id;
if ((ret = parse_identifier(id)) < 1) {
return ret;
}
*name = id;
*nam_len = ret;
parsed += ret;
id += ret;
if (id[0] == '[' && has_predicate) {
*has_predicate = 1;
}
return parsed;
}
/**
* @brief Parse predicate (instance-identifier) in JSON data format. That means that prefixes
* (which are mandatory) are actually model names.
*
* predicate = "[" *WSP (predicate-expr / pos) *WSP "]"
* predicate-expr = (node-identifier / ".") *WSP "=" *WSP
* ((DQUOTE string DQUOTE) /
* (SQUOTE string SQUOTE))
* pos = non-negative-integer-value
*
* @param[in] id Identifier to use.
* @param[out] model Points to the model name.
* @param[out] mod_len Length of the model name.
* @param[out] name Points to the node name. Can be identifier (from node-identifier), "." or pos.
* @param[out] nam_len Length of the node name.
* @param[out] value Value the node-identifier must have (string from the grammar),
* NULL if there is not any.
* @param[out] val_len Length of the value, 0 if there is not any.
* @param[out] has_predicate Flag to mark whether there is a predicate specified.
*
* @return Number of characters successfully parsed,
* positive on success, negative on failure.
*/
static int
parse_predicate(const char *id, const char **model, int *mod_len, const char **name, int *nam_len,
const char **value, int *val_len, int *has_predicate)
{
const char *ptr;
int parsed = 0, ret;
char quote;
assert(id);
if (model) {
*model = NULL;
}
if (mod_len) {
*mod_len = 0;
}
if (name) {
*name = NULL;
}
if (nam_len) {
*nam_len = 0;
}
if (value) {
*value = NULL;
}
if (val_len) {
*val_len = 0;
}
if (has_predicate) {
*has_predicate = 0;
}
if (id[0] != '[') {
return -parsed;
}
++parsed;
++id;
while (isspace(id[0])) {
++parsed;
++id;
}
/* pos */
if (isdigit(id[0])) {
if (name) {
*name = id;
}
if (id[0] == '0') {
return -parsed;
}
while (isdigit(id[0])) {
++parsed;
++id;
}
if (nam_len) {
*nam_len = id-(*name);
}
/* "." or node-identifier */
} else {
if (id[0] == '.') {
if (name) {
*name = id;
}
if (nam_len) {
*nam_len = 1;
}
++parsed;
++id;
} else {
if ((ret = parse_node_identifier(id, model, mod_len, name, nam_len)) < 1) {
return -parsed+ret;
} else if (model && !*model) {
return -parsed;
}
parsed += ret;
id += ret;
}
while (isspace(id[0])) {
++parsed;
++id;
}
if (id[0] != '=') {
return -parsed;
}
++parsed;
++id;
while (isspace(id[0])) {
++parsed;
++id;
}
/* ((DQUOTE string DQUOTE) / (SQUOTE string SQUOTE)) */
if ((id[0] == '\"') || (id[0] == '\'')) {
quote = id[0];
++parsed;
++id;
if ((ptr = strchr(id, quote)) == NULL) {
return -parsed;
}
ret = ptr-id;
if (value) {
*value = id;
}
if (val_len) {
*val_len = ret;
}
parsed += ret+1;
id += ret+1;
} else {
return -parsed;
}
}
while (isspace(id[0])) {
++parsed;
++id;
}
if (id[0] != ']') {
return -parsed;
}
++parsed;
++id;
if ((id[0] == '[') && has_predicate) {
*has_predicate = 1;
}
return parsed;
}
/**
* @brief Parse schema-nodeid.
*
* schema-nodeid = absolute-schema-nodeid /
* descendant-schema-nodeid
* absolute-schema-nodeid = 1*("/" node-identifier)
* descendant-schema-nodeid = ["." "/"]
* node-identifier
* absolute-schema-nodeid
*
* @param[in] id Identifier to use.
* @param[out] mod_name Points to the module name, NULL if there is not any.
* @param[out] mod_name_len Length of the module name, 0 if there is not any.
* @param[out] name Points to the node name.
* @param[out] nam_len Length of the node name.
* @param[out] is_relative Flag to mark whether the nodeid is absolute or descendant. Must be -1
* on the first call, must not be changed between consecutive calls.
* @param[out] has_predicate Flag to mark whether there is a predicate specified. It cannot be
* based on the grammar, in those cases use NULL.
*
* @return Number of characters successfully parsed,
* positive on success, negative on failure.
*/
int
parse_schema_nodeid(const char *id, const char **mod_name, int *mod_name_len, const char **name, int *nam_len,
int *is_relative, int *has_predicate)
{
int parsed = 0, ret;
assert(id);
assert(is_relative);
if (mod_name) {
*mod_name = NULL;
}
if (mod_name_len) {
*mod_name_len = 0;
}
if (name) {
*name = NULL;
}
if (nam_len) {
*nam_len = 0;
}
if (has_predicate) {
*has_predicate = 0;
}
if (id[0] != '/') {
if (*is_relative != -1) {
return -parsed;
} else {
*is_relative = 1;
}
if (!strncmp(id, "./", 2)) {
parsed += 2;
id += 2;
}
} else {
if (*is_relative == -1) {
*is_relative = 0;
}
++parsed;
++id;
}
if ((ret = parse_node_identifier(id, mod_name, mod_name_len, name, nam_len)) < 1) {
return -parsed+ret;
}
parsed += ret;
id += ret;
if ((id[0] == '[') && has_predicate) {
*has_predicate = 1;
}
return parsed;
}
/**
* @brief Parse schema predicate (special format internally used).
*
* predicate = "[" *WSP predicate-expr *WSP "]"
* predicate-expr = "." / identifier / key-with-value
* key-with-value = identifier *WSP "=" *WSP
* ((DQUOTE string DQUOTE) /
* (SQUOTE string SQUOTE))
*
* @param[in] id Identifier to use.
* @param[out] name Points to the list key name.
* @param[out] nam_len Length of \p name.
* @param[out] value Points to the key value. If specified, key-with-value is expected.
* @param[out] val_len Length of \p value.
* @param[out] has_predicate Flag to mark whether there is another predicate specified.
*/
int
parse_schema_json_predicate(const char *id, const char **name, int *nam_len, const char **value, int *val_len,
int *has_predicate)
{
const char *ptr;
int parsed = 0, ret;
char quote;
assert(id);
if (name) {
*name = NULL;
}
if (nam_len) {
*nam_len = 0;
}
if (value) {
*value = NULL;
}
if (val_len) {
*val_len = 0;
}
if (has_predicate) {
*has_predicate = 0;
}
if (id[0] != '[') {
return -parsed;
}
++parsed;
++id;
while (isspace(id[0])) {
++parsed;
++id;
}
/* identifier */
if (id[0] == '.') {
ret = 1;
} else if ((ret = parse_identifier(id)) < 1) {
return -parsed + ret;
}
if (name) {
*name = id;
}
if (nam_len) {
*nam_len = ret;
}
parsed += ret;
id += ret;
while (isspace(id[0])) {
++parsed;
++id;
}
/* there is value as well */
if (id[0] == '=') {
++parsed;
++id;
while (isspace(id[0])) {
++parsed;
++id;
}
/* ((DQUOTE string DQUOTE) / (SQUOTE string SQUOTE)) */
if ((id[0] == '\"') || (id[0] == '\'')) {
quote = id[0];
++parsed;
++id;
if ((ptr = strchr(id, quote)) == NULL) {
return -parsed;
}
ret = ptr - id;
if (value) {
*value = id;
}
if (val_len) {
*val_len = ret;
}
parsed += ret + 1;
id += ret + 1;
} else {
return -parsed;
}
while (isspace(id[0])) {
++parsed;
++id;
}
} else if (value) {
/* if value was expected, it's mandatory */
return -parsed;
}
if (id[0] != ']') {
return -parsed;
}
++parsed;
++id;
if ((id[0] == '[') && has_predicate) {
*has_predicate = 1;
}
return parsed;
}
/**
* @brief Resolve (find) a feature definition. Logs directly.
*
* @param[in] feat_name Feature name to resolve.
* @param[in] len Length of \p feat_name.
* @param[in] node Node with the if-feature expression.
* @param[out] feature Pointer to be set to point to the feature definition, if feature not found
* (return code 1), the pointer is untouched.
*
* @return 0 on success, 1 on forward reference, -1 on error.
*/
static int
resolve_feature(const char *feat_name, uint16_t len, const struct lys_node *node, struct lys_feature **feature)
{
char *str;
const char *mod_name, *name;
int mod_name_len, nam_len, i, j;
const struct lys_module *module;
assert(feature);
/* check prefix */
if ((i = parse_node_identifier(feat_name, &mod_name, &mod_name_len, &name, &nam_len)) < 1) {
LOGVAL(LYE_INCHAR, LY_VLOG_NONE, NULL, feat_name[-i], &feat_name[-i]);
return -1;
}
module = lys_get_import_module(lys_node_module(node), NULL, 0, mod_name, mod_name_len);
if (!module) {
/* identity refers unknown data model */
LOGVAL(LYE_INMOD_LEN, LY_VLOG_NONE, NULL, mod_name_len, mod_name);
return -1;
}
if (module != node->module && module == lys_node_module(node)) {
/* first, try to search directly in submodule where the feature was mentioned */
for (j = 0; j < node->module->features_size; j++) {
if (!strncmp(name, node->module->features[j].name, nam_len) && !node->module->features[j].name[nam_len]) {
/* check status */
if (lyp_check_status(node->flags, lys_node_module(node), node->name, node->module->features[j].flags,
node->module->features[j].module, node->module->features[j].name, NULL)) {
return -1;
}
*feature = &node->module->features[j];
return 0;
}
}
}
/* search in the identified module ... */
for (j = 0; j < module->features_size; j++) {
if (!strncmp(name, module->features[j].name, nam_len) && !module->features[j].name[nam_len]) {
/* check status */
if (lyp_check_status(node->flags, lys_node_module(node), node->name, module->features[j].flags,
module->features[j].module, module->features[j].name, NULL)) {
return -1;
}
*feature = &module->features[j];
return 0;
}
}
/* ... and all its submodules */
for (i = 0; i < module->inc_size; i++) {
if (!module->inc[i].submodule) {
/* not yet resolved */
continue;
}
for (j = 0; j < module->inc[i].submodule->features_size; j++) {
if (!strncmp(name, module->inc[i].submodule->features[j].name, nam_len)
&& !module->inc[i].submodule->features[j].name[nam_len]) {
/* check status */
if (lyp_check_status(node->flags, lys_node_module(node), node->name,
module->inc[i].submodule->features[j].flags,
module->inc[i].submodule->features[j].module,
module->inc[i].submodule->features[j].name, NULL)) {
return -1;
}
*feature = &module->inc[i].submodule->features[j];
return 0;
}
}
}
/* not found */
str = strndup(feat_name, len);
LOGVAL(LYE_INRESOLV, LY_VLOG_NONE, NULL, "feature", str);
free(str);
return 1;
}
/*
* @return
* - 1 if enabled
* - 0 if disabled
* - -1 if not usable by its if-feature expression
*/
static int
resolve_feature_value(const struct lys_feature *feat)
{
int i;
for (i = 0; i < feat->iffeature_size; i++) {
if (!resolve_iffeature(&feat->iffeature[i])) {
return -1;
}
}
return feat->flags & LYS_FENABLED ? 1 : 0;
}
static int
resolve_iffeature_recursive(struct lys_iffeature *expr, int *index_e, int *index_f)
{
uint8_t op;
int rc, a, b;
op = iff_getop(expr->expr, *index_e);
(*index_e)++;
switch (op) {
case LYS_IFF_F:
/* resolve feature */
return resolve_feature_value(expr->features[(*index_f)++]);
case LYS_IFF_NOT:
rc = resolve_iffeature_recursive(expr, index_e, index_f);
if (rc == -1) {
/* one of the referenced feature is hidden by its if-feature,
* so this if-feature expression is always false */
return -1;
} else {
/* invert result */
return rc ? 0 : 1;
}
case LYS_IFF_AND:
case LYS_IFF_OR:
a = resolve_iffeature_recursive(expr, index_e, index_f);
b = resolve_iffeature_recursive(expr, index_e, index_f);
if (a == -1 || b == -1) {
/* one of the referenced feature is hidden by its if-feature,
* so this if-feature expression is always false */
return -1;
} else if (op == LYS_IFF_AND) {
return a && b;
} else { /* LYS_IFF_OR */
return a || b;
}
}
return -1;
}
int
resolve_iffeature(struct lys_iffeature *expr)
{
int rc = -1;
int index_e = 0, index_f = 0;
if (expr->expr) {
rc = resolve_iffeature_recursive(expr, &index_e, &index_f);
}
return (rc == 1) ? 1 : 0;
}
struct iff_stack {
int size;
int index; /* first empty item */
uint8_t *stack;
};
static int
iff_stack_push(struct iff_stack *stack, uint8_t value)
{
if (stack->index == stack->size) {
stack->size += 4;
stack->stack = ly_realloc(stack->stack, stack->size * sizeof *stack->stack);
if (!stack->stack) {
LOGMEM;
stack->size = 0;
return EXIT_FAILURE;
}
}
stack->stack[stack->index++] = value;
return EXIT_SUCCESS;
}
static uint8_t
iff_stack_pop(struct iff_stack *stack)
{
stack->index--;
return stack->stack[stack->index];
}
static void
iff_stack_clean(struct iff_stack *stack)
{
stack->size = 0;
free(stack->stack);
}
static void
iff_setop(uint8_t *list, uint8_t op, int pos)
{
uint8_t *item;
uint8_t mask = 3;
assert(pos >= 0);
assert(op <= 3); /* max 2 bits */
item = &list[pos / 4];
mask = mask << 2 * (pos % 4);
*item = (*item) & ~mask;
*item = (*item) | (op << 2 * (pos % 4));
}
uint8_t
iff_getop(uint8_t *list, int pos)
{
uint8_t *item;
uint8_t mask = 3, result;
assert(pos >= 0);
item = &list[pos / 4];
result = (*item) & (mask << 2 * (pos % 4));
return result >> 2 * (pos % 4);
}
#define LYS_IFF_LP 0x04 /* ( */
#define LYS_IFF_RP 0x08 /* ) */
/* internal structure for passing data for UNRES_IFFEAT */
struct unres_iffeat_data {
struct lys_node *node;
const char *fname;
};
void
resolve_iffeature_getsizes(struct lys_iffeature *iffeat, unsigned int *expr_size, unsigned int *feat_size)
{
unsigned int e = 0, f = 0, r = 0;
uint8_t op;
assert(iffeat);
if (!iffeat->expr) {
goto result;
}
do {
op = iff_getop(iffeat->expr, e++);
switch (op) {
case LYS_IFF_NOT:
if (!r) {
r += 1;
}
break;
case LYS_IFF_AND:
case LYS_IFF_OR:
if (!r) {
r += 2;
} else {
r += 1;
}
break;
case LYS_IFF_F:
f++;
if (r) {
r--;
}
break;
}
} while(r);
result:
if (expr_size) {
*expr_size = e;
}
if (feat_size) {
*feat_size = f;
}
}
int
resolve_iffeature_compile(struct lys_iffeature *iffeat_expr, const char *value, struct lys_node *node,
struct unres_schema *unres)
{
const char *c = value;
int r, rc = EXIT_FAILURE;
int i, j, last_not, checkversion = 0;
unsigned int f_size = 0, expr_size = 0, f_exp = 1;
uint8_t op;
struct iff_stack stack = {0, 0, NULL};
struct unres_iffeat_data *iff_data;
assert(c);
if (isspace(c[0])) {
LOGVAL(LYE_INCHAR, LY_VLOG_NONE, NULL, c[0], c);
return EXIT_FAILURE;
}
/* pre-parse the expression to get sizes for arrays, also do some syntax checks of the expression */
for (i = j = last_not = 0; c[i]; i++) {
if (c[i] == '(') {
checkversion = 1;
j++;
continue;
} else if (c[i] == ')') {
j--;
continue;
} else if (isspace(c[i])) {
continue;
}
if (!strncmp(&c[i], "not", r = 3) || !strncmp(&c[i], "and", r = 3) || !strncmp(&c[i], "or", r = 2)) {
if (c[i + r] == '\0') {
LOGVAL(LYE_INARG, LY_VLOG_NONE, NULL, value, "if-feature");
return EXIT_FAILURE;
} else if (!isspace(c[i + r])) {
/* feature name starting with the not/and/or */
last_not = 0;
f_size++;
} else if (c[i] == 'n') { /* not operation */
if (last_not) {
/* double not */
expr_size = expr_size - 2;
last_not = 0;
} else {
last_not = 1;
}
} else { /* and, or */
f_exp++;
/* not a not operation */
last_not = 0;
}
i += r;
} else {
f_size++;
last_not = 0;
}
expr_size++;
while (!isspace(c[i])) {
if (!c[i] || c[i] == ')') {
i--;
break;
}
i++;
}
}
if (j || f_exp != f_size) {
/* not matching count of ( and ) */
LOGVAL(LYE_INARG, LY_VLOG_NONE, NULL, value, "if-feature");
return EXIT_FAILURE;
}
if (checkversion || expr_size > 1) {
/* check that we have 1.1 module */
if (node->module->version != 2) {
LOGVAL(LYE_INARG, LY_VLOG_NONE, NULL, value, "if-feature");
LOGVAL(LYE_SPEC, LY_VLOG_NONE, NULL, "YANG 1.1 if-feature expression found in 1.0 module.");
return EXIT_FAILURE;
}
}
/* allocate the memory */
iffeat_expr->expr = calloc((j = (expr_size / 4) + ((expr_size % 4) ? 1 : 0)), sizeof *iffeat_expr->expr);
iffeat_expr->features = calloc(f_size, sizeof *iffeat_expr->features);
stack.size = expr_size;
stack.stack = malloc(expr_size * sizeof *stack.stack);
if (!stack.stack || !iffeat_expr->expr || !iffeat_expr->features) {
LOGMEM;
goto error;
}
f_size--; expr_size--; /* used as indexes from now */
for (i--; i >= 0; i--) {
if (c[i] == ')') {
/* push it on stack */
iff_stack_push(&stack, LYS_IFF_RP);
continue;
} else if (c[i] == '(') {
/* pop from the stack into result all operators until ) */
while((op = iff_stack_pop(&stack)) != LYS_IFF_RP) {
iff_setop(iffeat_expr->expr, op, expr_size--);
}
continue;
} else if (isspace(c[i])) {
continue;
}
/* end operator or operand -> find beginning and get what is it */
j = i + 1;
while (i >= 0 && !isspace(c[i]) && c[i] != '(') {
i--;
}
i++; /* get back by one step */
if (!strncmp(&c[i], "not ", 4)) {
if (stack.index && stack.stack[stack.index - 1] == LYS_IFF_NOT) {
/* double not */
iff_stack_pop(&stack);
} else {
/* not has the highest priority, so do not pop from the stack
* as in case of AND and OR */
iff_stack_push(&stack, LYS_IFF_NOT);
}
} else if (!strncmp(&c[i], "and ", 4)) {
/* as for OR - pop from the stack all operators with the same or higher
* priority and store them to the result, then push the AND to the stack */
while (stack.index && stack.stack[stack.index - 1] <= LYS_IFF_AND) {
op = iff_stack_pop(&stack);
iff_setop(iffeat_expr->expr, op, expr_size--);
}
iff_stack_push(&stack, LYS_IFF_AND);
} else if (!strncmp(&c[i], "or ", 3)) {
while (stack.index && stack.stack[stack.index - 1] <= LYS_IFF_OR) {
op = iff_stack_pop(&stack);
iff_setop(iffeat_expr->expr, op, expr_size--);
}
iff_stack_push(&stack, LYS_IFF_OR);
} else {
/* feature name, length is j - i */
/* add it to the result */
iff_setop(iffeat_expr->expr, LYS_IFF_F, expr_size--);
/* now get the link to the feature definition. Since it can be
* forward referenced, we have to keep the feature name in auxiliary
* structure passed into unres */
iff_data = malloc(sizeof *iff_data);
iff_data->node = node;
iff_data->fname = lydict_insert(node->module->ctx, &c[i], j - i);
r = unres_schema_add_node(node->module, unres, &iffeat_expr->features[f_size], UNRES_IFFEAT,
(struct lys_node *)iff_data);
f_size--;
if (r == -1) {
free(iff_data);
goto error;
}
}
}
while (stack.index) {
op = iff_stack_pop(&stack);
iff_setop(iffeat_expr->expr, op, expr_size--);
}
if (++expr_size || ++f_size) {
/* not all expected operators and operands found */
LOGVAL(LYE_INARG, LY_VLOG_NONE, NULL, value, "if-feature");
rc = EXIT_FAILURE;
} else {
rc = EXIT_SUCCESS;
}
error:
/* cleanup */
iff_stack_clean(&stack);
return rc;
}
/**
* @brief Resolve (find) a data node based on a schema-nodeid.
*
* Used for resolving unique statements - so id is expected to be relative and local (without reference to a different
* module).
*
*/
struct lyd_node *
resolve_data_descendant_schema_nodeid(const char *nodeid, struct lyd_node *start)
{
char *str, *token, *p;
struct lyd_node *result = NULL, *iter;
const struct lys_node *schema = NULL;
int shorthand = 0;
assert(nodeid && start);
if (nodeid[0] == '/') {
return NULL;
}
str = p = strdup(nodeid);
if (!str) {
LOGMEM;
return NULL;
}
while (p) {
token = p;
p = strchr(p, '/');
if (p) {
*p = '\0';
p++;
}
if (p) {
/* inner node */
if (resolve_descendant_schema_nodeid(token, schema ? schema->child : start->schema,
LYS_CONTAINER | LYS_CHOICE | LYS_CASE | LYS_LEAF, 0, 0, &schema)
|| !schema) {
result = NULL;
break;
}
if (schema->nodetype & (LYS_CHOICE | LYS_CASE)) {
continue;
} else if (lys_parent(schema)->nodetype == LYS_CHOICE) {
/* shorthand case */
if (!shorthand) {
shorthand = 1;
schema = lys_parent(schema);
continue;
} else {
shorthand = 0;
if (schema->nodetype == LYS_LEAF) {
/* should not be here, since we have leaf, which is not a shorthand nor final node */
result = NULL;
break;
}
}
}
} else {
/* final node */
if (resolve_descendant_schema_nodeid(token, schema ? schema->child : start->schema, LYS_LEAF,
shorthand ? 0 : 1, 0, &schema)
|| !schema) {
result = NULL;
break;
}
}
LY_TREE_FOR(result ? result->child : start, iter) {
if (iter->schema == schema) {
/* move in data tree according to returned schema */
result = iter;
break;
}
}
if (!iter) {
/* instance not found */
result = NULL;
break;
}
}
free(str);
return result;
}
/*
* 0 - ok (done)
* 1 - continue
* 2 - break
* -1 - error
*/
static int
schema_nodeid_siblingcheck(const struct lys_node *sibling, int8_t *shorthand, const char *id,
const struct lys_module *module, const char *mod_name, int mod_name_len,
int implemented_mod, const struct lys_node **start)
{
const struct lys_module *prefix_mod;
int sh = 0;
/* module check */
prefix_mod = lys_get_import_module(module, NULL, 0, mod_name, mod_name_len);
if (implemented_mod) {
prefix_mod = lys_get_implemented_module(prefix_mod);
}
if (!prefix_mod) {
return -1;
}
if (prefix_mod != lys_node_module(sibling)) {
return 1;
}
/* check for shorthand cases - then 'start' does not change */
if (lys_parent(sibling) && (lys_parent(sibling)->nodetype == LYS_CHOICE) && (sibling->nodetype != LYS_CASE)) {
if (*shorthand != -1) {
*shorthand = *shorthand ? 0 : 1;
}
sh = 1;
}
/* the result node? */
if (!id[0]) {
if (*shorthand == 1) {
return 1;
}
return 0;
}
if (!sh) {
/* move down the tree, if possible */
if (sibling->nodetype & (LYS_LEAF | LYS_LEAFLIST | LYS_ANYDATA)) {
return -1;
}
*start = sibling->child;
}
return 2;
}
/* start - relative, module - absolute, -1 error, EXIT_SUCCESS ok (but ret can still be NULL), >0 unexpected char on ret - 1 */
int
resolve_augment_schema_nodeid(const char *nodeid, const struct lys_node *start, const struct lys_module *module,
const struct lys_node **ret)
{
const char *name, *mod_name, *id;
const struct lys_node *sibling;
int r, nam_len, mod_name_len, is_relative = -1;
int8_t shorthand = 0;
int implemented_search = 0;
/* resolved import module from the start module, it must match the next node-name-match sibling */
const struct lys_module *start_mod;
assert(nodeid && (start || module) && !(start && module) && ret);
id = nodeid;
if ((r = parse_schema_nodeid(id, &mod_name, &mod_name_len, &name, &nam_len, &is_relative, NULL)) < 1) {
return ((id - nodeid) - r) + 1;
}
id += r;
if ((is_relative && !start) || (!is_relative && !module)) {
return -1;
}
/* descendant-schema-nodeid */
if (is_relative) {
module = start_mod = start->module;
/* absolute-schema-nodeid */
} else {
start_mod = lys_get_import_module(module, NULL, 0, mod_name, mod_name_len);
if (start_mod != lys_main_module(module)) {
/* if the submodule augments the mainmodule (or in general a module augments
* itself, we don't want to search for the implemented module but augments
* the module anyway. But when augmenting another module, we need the implemented
* revision of the module if any */
start_mod = lys_get_implemented_module(start_mod);
implemented_search = 1;
}
if (!start_mod) {
return -1;
}
start = start_mod->data;
}
while (1) {
sibling = NULL;
while ((sibling = lys_getnext(sibling, lys_parent(start), start_mod,
LYS_GETNEXT_WITHCHOICE | LYS_GETNEXT_WITHCASE | LYS_GETNEXT_WITHINOUT))) {
/* name match */
if (sibling->name && !strncmp(name, sibling->name, nam_len) && !sibling->name[nam_len]) {
r = schema_nodeid_siblingcheck(sibling, &shorthand, id, module, mod_name, mod_name_len,
implemented_search, &start);
if (r == 0) {
*ret = sibling;
return EXIT_SUCCESS;
} else if (r == 1) {
continue;
} else if (r == 2) {
break;
} else {
return -1;
}
}
}
/* no match */
if (!sibling) {
*ret = NULL;
return EXIT_SUCCESS;
}
if ((r = parse_schema_nodeid(id, &mod_name, &mod_name_len, &name, &nam_len, &is_relative, NULL)) < 1) {
return ((id - nodeid) - r) + 1;
}
id += r;
}
/* cannot get here */
LOGINT;
return -1;
}
/* unique, refine,
* >0 - unexpected char on position (ret - 1),
* 0 - ok (but ret can still be NULL),
* -1 - error,
* -2 - violated no_innerlist */
int
resolve_descendant_schema_nodeid(const char *nodeid, const struct lys_node *start, int ret_nodetype,
int check_shorthand, int no_innerlist, const struct lys_node **ret)
{
const char *name, *mod_name, *id;
const struct lys_node *sibling;
int r, nam_len, mod_name_len, is_relative = -1;
int8_t shorthand = check_shorthand ? 0 : -1;
/* resolved import module from the start module, it must match the next node-name-match sibling */
const struct lys_module *module;
assert(nodeid && start && ret);
assert(!(ret_nodetype & (LYS_USES | LYS_AUGMENT)) && ((ret_nodetype == LYS_GROUPING) || !(ret_nodetype & LYS_GROUPING)));
id = nodeid;
module = start->module;
if ((r = parse_schema_nodeid(id, &mod_name, &mod_name_len, &name, &nam_len, &is_relative, NULL)) < 1) {
return ((id - nodeid) - r) + 1;
}
id += r;
if (!is_relative) {
return -1;
}
while (1) {
sibling = NULL;
while ((sibling = lys_getnext(sibling, lys_parent(start), module,
LYS_GETNEXT_WITHCHOICE | LYS_GETNEXT_WITHCASE))) {
/* name match */
if (sibling->name && !strncmp(name, sibling->name, nam_len) && !sibling->name[nam_len]) {
r = schema_nodeid_siblingcheck(sibling, &shorthand, id, module, mod_name, mod_name_len, 0, &start);
if (r == 0) {
if (!(sibling->nodetype & ret_nodetype)) {
/* wrong node type, too bad */
continue;
}
*ret = sibling;
return EXIT_SUCCESS;
} else if (r == 1) {
continue;
} else if (r == 2) {
break;
} else {
return -1;
}
}
}
/* no match */
if (!sibling) {
*ret = NULL;
return EXIT_SUCCESS;
} else if (no_innerlist && sibling->nodetype == LYS_LIST) {
*ret = NULL;
return -2;
}
if ((r = parse_schema_nodeid(id, &mod_name, &mod_name_len, &name, &nam_len, &is_relative, NULL)) < 1) {
return ((id - nodeid) - r) + 1;
}
id += r;
}
/* cannot get here */
LOGINT;
return -1;
}
/* choice default */
int
resolve_choice_default_schema_nodeid(const char *nodeid, const struct lys_node *start, const struct lys_node **ret)
{
/* cannot actually be a path */
if (strchr(nodeid, '/')) {
return -1;
}
return resolve_descendant_schema_nodeid(nodeid, start, LYS_NO_RPC_NOTIF_NODE, 1, 0, ret);
}
/* uses, -1 error, EXIT_SUCCESS ok (but ret can still be NULL), >0 unexpected char on ret - 1 */
static int
resolve_uses_schema_nodeid(const char *nodeid, const struct lys_node *start, const struct lys_node_grp **ret)
{
const struct lys_module *module;
const char *mod_prefix, *name;
int i, mod_prefix_len, nam_len;
/* parse the identifier, it must be parsed on one call */
if (((i = parse_node_identifier(nodeid, &mod_prefix, &mod_prefix_len, &name, &nam_len)) < 1) || nodeid[i]) {
return -i + 1;
}
module = lys_get_import_module(start->module, mod_prefix, mod_prefix_len, NULL, 0);
if (!module) {
return -1;
}
if (module != start->module) {
start = module->data;
}
*ret = lys_find_grouping_up(name, (struct lys_node *)start);
return EXIT_SUCCESS;
}
int
resolve_absolute_schema_nodeid(const char *nodeid, const struct lys_module *module, int ret_nodetype,
const struct lys_node **ret)
{
const char *name, *mod_name, *id;
const struct lys_node *sibling, *start;
int r, nam_len, mod_name_len, is_relative = -1;
int8_t shorthand = 0;
const struct lys_module *abs_start_mod;
assert(nodeid && module && ret);
assert(!(ret_nodetype & (LYS_USES | LYS_AUGMENT)) && ((ret_nodetype == LYS_GROUPING) || !(ret_nodetype & LYS_GROUPING)));
id = nodeid;
start = module->data;
if ((r = parse_schema_nodeid(id, &mod_name, &mod_name_len, &name, &nam_len, &is_relative, NULL)) < 1) {
return ((id - nodeid) - r) + 1;
}
id += r;
if (is_relative) {
return -1;
}
abs_start_mod = lys_get_import_module(module, NULL, 0, mod_name, mod_name_len);
if (!abs_start_mod) {
return -1;
}
while (1) {
sibling = NULL;
while ((sibling = lys_getnext(sibling, lys_parent(start), abs_start_mod, LYS_GETNEXT_WITHCHOICE
| LYS_GETNEXT_WITHCASE | LYS_GETNEXT_WITHINOUT | LYS_GETNEXT_WITHGROUPING))) {
/* name match */
if (sibling->name && !strncmp(name, sibling->name, nam_len) && !sibling->name[nam_len]) {
r = schema_nodeid_siblingcheck(sibling, &shorthand, id, module, mod_name, mod_name_len, 0, &start);
if (r == 0) {
if (!(sibling->nodetype & ret_nodetype)) {
/* wrong node type, too bad */
continue;
}
*ret = sibling;
return EXIT_SUCCESS;
} else if (r == 1) {
continue;
} else if (r == 2) {
break;
} else {
return -1;
}
}
}
/* no match */
if (!sibling) {
*ret = NULL;
return EXIT_SUCCESS;
}
if ((r = parse_schema_nodeid(id, &mod_name, &mod_name_len, &name, &nam_len, &is_relative, NULL)) < 1) {
return ((id - nodeid) - r) + 1;
}
id += r;
}
/* cannot get here */
LOGINT;
return -1;
}
static int
resolve_json_schema_list_predicate(const char *predicate, const struct lys_node_list *list, int *parsed)
{
const char *name;
int nam_len, has_predicate, i;
if (((i = parse_schema_json_predicate(predicate, &name, &nam_len, NULL, NULL, &has_predicate)) < 1)
|| !strncmp(name, ".", nam_len)) {
LOGVAL(LYE_PATH_INCHAR, LY_VLOG_NONE, NULL, predicate[-i], &predicate[-i]);
return -1;
}
predicate += i;
*parsed += i;
for (i = 0; i < list->keys_size; ++i) {
if (!strncmp(list->keys[i]->name, name, nam_len) && !list->keys[i]->name[nam_len]) {
break;
}
}
if (i == list->keys_size) {
LOGVAL(LYE_PATH_INKEY, LY_VLOG_NONE, NULL, name);
return -1;
}
/* more predicates? */
if (has_predicate) {
return resolve_json_schema_list_predicate(predicate, list, parsed);
}
return 0;
}
/* cannot return LYS_GROUPING, LYS_AUGMENT, LYS_USES, logs directly */
const struct lys_node *
resolve_json_nodeid(const char *nodeid, struct ly_ctx *ctx, const struct lys_node *start)
{
char *module_name = ly_buf(), *buf_backup = NULL, *str;
const char *name, *mod_name, *id;
const struct lys_node *sibling;
int r, nam_len, mod_name_len, is_relative = -1, has_predicate, shorthand = 0;
/* resolved import module from the start module, it must match the next node-name-match sibling */
const struct lys_module *prefix_mod, *module, *prev_mod;
assert(nodeid && (ctx || start));
if (!ctx) {
ctx = start->module->ctx;
}
id = nodeid;
if ((r = parse_schema_nodeid(id, &mod_name, &mod_name_len, &name, &nam_len, &is_relative, &has_predicate)) < 1) {
LOGVAL(LYE_PATH_INCHAR, LY_VLOG_NONE, NULL, id[-r], &id[-r]);
return NULL;
}
id += r;
if (is_relative) {
assert(start);
start = start->child;
if (!start) {
/* no descendants, fail for sure */
str = strndup(nodeid, (name + nam_len) - nodeid);
LOGVAL(LYE_PATH_INNODE, LY_VLOG_STR, str);
free(str);
return NULL;
}
module = start->module;
} else {
if (!mod_name) {
str = strndup(nodeid, (name + nam_len) - nodeid);
LOGVAL(LYE_PATH_MISSMOD, LY_VLOG_STR, nodeid);
free(str);
return NULL;
} else if (mod_name_len > LY_BUF_SIZE - 1) {
LOGINT;
return NULL;
}
if (ly_buf_used && module_name[0]) {
buf_backup = strndup(module_name, LY_BUF_SIZE - 1);
}
ly_buf_used++;
memmove(module_name, mod_name, mod_name_len);
module_name[mod_name_len] = '\0';
module = ly_ctx_get_module(ctx, module_name, NULL);
if (buf_backup) {
/* return previous internal buffer content */
strcpy(module_name, buf_backup);
free(buf_backup);
buf_backup = NULL;
}
ly_buf_used--;
if (!module) {
str = strndup(nodeid, (mod_name + mod_name_len) - nodeid);
LOGVAL(LYE_PATH_INMOD, LY_VLOG_STR, str);
free(str);
return NULL;
}
start = module->data;
/* now it's as if there was no module name */
mod_name = NULL;
mod_name_len = 0;
}
prev_mod = module;
while (1) {
sibling = NULL;
while ((sibling = lys_getnext(sibling, lys_parent(start), module,
LYS_GETNEXT_WITHCHOICE | LYS_GETNEXT_WITHCASE | LYS_GETNEXT_WITHINOUT))) {
/* name match */
if (sibling->name && !strncmp(name, sibling->name, nam_len) && !sibling->name[nam_len]) {
/* module check */
if (mod_name) {
if (mod_name_len > LY_BUF_SIZE - 1) {
LOGINT;
return NULL;
}
if (ly_buf_used && module_name[0]) {
buf_backup = strndup(module_name, LY_BUF_SIZE - 1);
}
ly_buf_used++;
memmove(module_name, mod_name, mod_name_len);
module_name[mod_name_len] = '\0';
/* will also find an augment module */
prefix_mod = ly_ctx_get_module(ctx, module_name, NULL);
if (buf_backup) {
/* return previous internal buffer content */
strncpy(module_name, buf_backup, LY_BUF_SIZE - 1);
free(buf_backup);
buf_backup = NULL;
}
ly_buf_used--;
if (!prefix_mod) {
str = strndup(nodeid, (mod_name + mod_name_len) - nodeid);
LOGVAL(LYE_PATH_INMOD, LY_VLOG_STR, str);
free(str);
return NULL;
}
} else {
prefix_mod = prev_mod;
}
if (prefix_mod != lys_node_module(sibling)) {
continue;
}
/* do we have some predicates on it? */
if (has_predicate) {
r = 0;
if (sibling->nodetype & (LYS_LEAF | LYS_LEAFLIST)) {
if ((r = parse_schema_json_predicate(id, NULL, NULL, NULL, NULL, &has_predicate)) < 1) {
LOGVAL(LYE_PATH_INCHAR, LY_VLOG_NONE, NULL, id[-r], &id[-r]);
return NULL;
}
} else if (sibling->nodetype == LYS_LIST) {
if (resolve_json_schema_list_predicate(id, (const struct lys_node_list *)sibling, &r)) {
return NULL;
}
} else {
LOGVAL(LYE_PATH_INCHAR, LY_VLOG_NONE, NULL, id[0], id);
return NULL;
}
id += r;
}
/* check for shorthand cases - then 'start' does not change */
if (lys_parent(sibling) && (lys_parent(sibling)->nodetype == LYS_CHOICE) && (sibling->nodetype != LYS_CASE)) {
shorthand = ~shorthand;
}
/* the result node? */
if (!id[0]) {
if (shorthand) {
/* wrong path for shorthand */
str = strndup(nodeid, (name + nam_len) - nodeid);
LOGVAL(LYE_PATH_INNODE, LY_VLOG_STR, str);
LOGVAL(LYE_SPEC, LY_VLOG_STR, str, "Schema shorthand case path must include the virtual case statement.");
free(str);
return NULL;
}
return sibling;
}
if (!shorthand) {
/* move down the tree, if possible */
if (sibling->nodetype & (LYS_LEAF | LYS_LEAFLIST | LYS_ANYDATA)) {
LOGVAL(LYE_PATH_INCHAR, LY_VLOG_NONE, NULL, id[0], id);
return NULL;
}
start = sibling->child;
}
/* update prev mod */
prev_mod = start->module;
break;
}
}
/* no match */
if (!sibling) {
str = strndup(nodeid, (name + nam_len) - nodeid);
LOGVAL(LYE_PATH_INNODE, LY_VLOG_STR, str);
free(str);
return NULL;
}
if ((r = parse_schema_nodeid(id, &mod_name, &mod_name_len, &name, &nam_len, &is_relative, &has_predicate)) < 1) {
LOGVAL(LYE_PATH_INCHAR, LY_VLOG_NONE, NULL, id[-r], &id[-r]);
return NULL;
}
id += r;
}
/* cannot get here */
LOGINT;
return NULL;
}
static int
resolve_partial_json_data_list_predicate(const char *predicate, const char *node_name, struct lyd_node *node, int *parsed)
{
const char *name, *value;
int nam_len, val_len, has_predicate = 1, r;
uint16_t i;
struct lyd_node_leaf_list *key;
assert(node);
assert(node->schema->nodetype == LYS_LIST);
key = (struct lyd_node_leaf_list *)node->child;
for (i = 0; i < ((struct lys_node_list *)node->schema)->keys_size; ++i) {
if (!key) {
/* invalid data */
LOGINT;
return -1;
}
if (!has_predicate) {
LOGVAL(LYE_PATH_MISSKEY, LY_VLOG_NONE, NULL, node_name);
return -1;
}
if (((r = parse_schema_json_predicate(predicate, &name, &nam_len, &value, &val_len, &has_predicate)) < 1)
|| !strncmp(name, ".", nam_len)) {
LOGVAL(LYE_PATH_INCHAR, LY_VLOG_NONE, NULL, predicate[-r], &predicate[-r]);
return -1;
}
predicate += r;
*parsed += r;
if (strncmp(key->schema->name, name, nam_len) || key->schema->name[nam_len]) {
LOGVAL(LYE_PATH_INKEY, LY_VLOG_NONE, NULL, name);
return -1;
}
/* value does not match */
if (strncmp(key->value_str, value, val_len) || key->value_str[val_len]) {
return 1;
}
key = (struct lyd_node_leaf_list *)key->next;
}
if (has_predicate) {
LOGVAL(LYE_PATH_INKEY, LY_VLOG_NONE, NULL, name);
return -1;
}
return 0;
}
/**
* @brief get the closest parent of the node (or the node itself) identified by the nodeid (path)
*
* @param[in] nodeid Node data path to find
* @param[in] llist_value If the \p nodeid identifies leaf-list, this is expected value of the leaf-list instance.
* @param[in] options Bitmask of options flags, see @ref pathoptions.
* @param[out] parsed Number of characters processed in \p id
* @return The closes parent (or the node itself) from the path
*/
struct lyd_node *
resolve_partial_json_data_nodeid(const char *nodeid, const char *llist_value, struct lyd_node *start, int options,
int *parsed)
{
char *module_name = ly_buf(), *buf_backup = NULL, *str;
const char *id, *mod_name, *name;
int r, ret, mod_name_len, nam_len, is_relative = -1, has_predicate, last_parsed;
struct lyd_node *sibling, *last_match = NULL;
struct lyd_node_leaf_list *llist;
const struct lys_module *prefix_mod, *prev_mod;
struct ly_ctx *ctx;
assert(nodeid && start && parsed);
ctx = start->schema->module->ctx;
id = nodeid;
if ((r = parse_schema_nodeid(id, &mod_name, &mod_name_len, &name, &nam_len, &is_relative, &has_predicate)) < 1) {
LOGVAL(LYE_PATH_INCHAR, LY_VLOG_NONE, NULL, id[-r], &id[-r]);
*parsed = -1;
return NULL;
}
id += r;
/* add it to parsed only after the data node was actually found */
last_parsed = r;
if (is_relative) {
prev_mod = start->schema->module;
start = start->child;
} else {
for (; start->parent; start = start->parent);
prev_mod = start->schema->module;
}
while (1) {
LY_TREE_FOR(start, sibling) {
/* RPC/action data check, return simply invalid argument, because the data tree is invalid */
if (lys_parent(sibling->schema)) {
if (options & LYD_PATH_OPT_OUTPUT) {
if (lys_parent(sibling->schema)->nodetype == LYS_INPUT) {
LOGERR(LY_EINVAL, "Provided data tree includes some RPC input nodes (%s).", sibling->schema->name);
*parsed = -1;
return NULL;
}
} else {
if (lys_parent(sibling->schema)->nodetype == LYS_OUTPUT) {
LOGERR(LY_EINVAL, "Provided data tree includes some RPC output nodes (%s).", sibling->schema->name);
*parsed = -1;
return NULL;
}
}
}
/* name match */
if (!strncmp(name, sibling->schema->name, nam_len) && !sibling->schema->name[nam_len]) {
/* module check */
if (mod_name) {
if (mod_name_len > LY_BUF_SIZE - 1) {
LOGINT;
*parsed = -1;
return NULL;
}
if (ly_buf_used && module_name[0]) {
buf_backup = strndup(module_name, LY_BUF_SIZE - 1);
}
ly_buf_used++;
memmove(module_name, mod_name, mod_name_len);
module_name[mod_name_len] = '\0';
/* will also find an augment module */
prefix_mod = ly_ctx_get_module(ctx, module_name, NULL);
if (buf_backup) {
/* return previous internal buffer content */
strncpy(module_name, buf_backup, LY_BUF_SIZE - 1);
free(buf_backup);
buf_backup = NULL;
}
ly_buf_used--;
if (!prefix_mod) {
str = strndup(nodeid, (mod_name + mod_name_len) - nodeid);
LOGVAL(LYE_PATH_INMOD, LY_VLOG_STR, str);
free(str);
*parsed = -1;
return NULL;
}
} else {
prefix_mod = prev_mod;
}
if (prefix_mod != lys_node_module(sibling->schema)) {
continue;
}
/* leaf-list, did we find it with the correct value or not? */
if (sibling->schema->nodetype == LYS_LEAFLIST) {
llist = (struct lyd_node_leaf_list *)sibling;
if ((!llist_value && llist->value_str && llist->value_str[0])
|| (llist_value && strcmp(llist_value, llist->value_str))) {
continue;
}
} else if (sibling->schema->nodetype == LYS_LIST) {
/* list, we need predicates'n'stuff then */
r = 0;
if (!has_predicate) {
LOGVAL(LYE_PATH_MISSKEY, LY_VLOG_NONE, NULL, name);
*parsed = -1;
return NULL;
}
ret = resolve_partial_json_data_list_predicate(id, name, sibling, &r);
if (ret == -1) {
*parsed = -1;
return NULL;
} else if (ret == 1) {
/* this list instance does not match */
continue;
}
id += r;
last_parsed += r;
}
*parsed += last_parsed;
/* the result node? */
if (!id[0]) {
return sibling;
}
/* move down the tree, if possible */
if (sibling->schema->nodetype & (LYS_LEAF | LYS_LEAFLIST | LYS_ANYDATA)) {
LOGVAL(LYE_PATH_INCHAR, LY_VLOG_NONE, NULL, id[0], id);
*parsed = -1;
return NULL;
}
last_match = sibling;
start = sibling->child;
if (start) {
prev_mod = start->schema->module;
}
break;
}
}
/* no match, return last match */
if (!sibling) {
return last_match;
}
if ((r = parse_schema_nodeid(id, &mod_name, &mod_name_len, &name, &nam_len, &is_relative, &has_predicate)) < 1) {
LOGVAL(LYE_PATH_INCHAR, LY_VLOG_NONE, NULL, id[-r], &id[-r]);
*parsed = -1;
return NULL;
}
id += r;
last_parsed = r;
}
/* cannot get here */
LOGINT;
*parsed = -1;
return NULL;
}
/**
* @brief Resolves length or range intervals. Does not log.
* Syntax is assumed to be correct, *ret MUST be NULL.
*
* @param[in] str_restr Restriction as a string.
* @param[in] type Type of the restriction.
* @param[out] ret Final interval structure that starts with
* the interval of the initial type, continues with intervals
* of any superior types derived from the initial one, and
* finishes with intervals from our \p type.
*
* @return EXIT_SUCCESS on succes, -1 on error.
*/
int
resolve_len_ran_interval(const char *str_restr, struct lys_type *type, struct len_ran_intv **ret)
{
/* 0 - unsigned, 1 - signed, 2 - floating point */
int kind;
int64_t local_smin, local_smax, local_fmin, local_fmax;
uint64_t local_umin, local_umax;
uint8_t local_fdig;
const char *seg_ptr, *ptr;
struct len_ran_intv *local_intv = NULL, *tmp_local_intv = NULL, *tmp_intv, *intv = NULL;
switch (type->base) {
case LY_TYPE_BINARY:
kind = 0;
local_umin = 0;
local_umax = 18446744073709551615UL;
if (!str_restr && type->info.binary.length) {
str_restr = type->info.binary.length->expr;
}
break;
case LY_TYPE_DEC64:
kind = 2;
local_fmin = __INT64_C(-9223372036854775807) - __INT64_C(1);
local_fmax = __INT64_C(9223372036854775807);
local_fdig = type->info.dec64.dig;
if (!str_restr && type->info.dec64.range) {
str_restr = type->info.dec64.range->expr;
}
break;
case LY_TYPE_INT8:
kind = 1;
local_smin = __INT64_C(-128);
local_smax = __INT64_C(127);
if (!str_restr && type->info.num.range) {
str_restr = type->info.num.range->expr;
}
break;
case LY_TYPE_INT16:
kind = 1;
local_smin = __INT64_C(-32768);
local_smax = __INT64_C(32767);
if (!str_restr && type->info.num.range) {
str_restr = type->info.num.range->expr;
}
break;
case LY_TYPE_INT32:
kind = 1;
local_smin = __INT64_C(-2147483648);
local_smax = __INT64_C(2147483647);
if (!str_restr && type->info.num.range) {
str_restr = type->info.num.range->expr;
}
break;
case LY_TYPE_INT64:
kind = 1;
local_smin = __INT64_C(-9223372036854775807) - __INT64_C(1);
local_smax = __INT64_C(9223372036854775807);
if (!str_restr && type->info.num.range) {
str_restr = type->info.num.range->expr;
}
break;
case LY_TYPE_UINT8:
kind = 0;
local_umin = __UINT64_C(0);
local_umax = __UINT64_C(255);
if (!str_restr && type->info.num.range) {
str_restr = type->info.num.range->expr;
}
break;
case LY_TYPE_UINT16:
kind = 0;
local_umin = __UINT64_C(0);
local_umax = __UINT64_C(65535);
if (!str_restr && type->info.num.range) {
str_restr = type->info.num.range->expr;
}
break;
case LY_TYPE_UINT32:
kind = 0;
local_umin = __UINT64_C(0);
local_umax = __UINT64_C(4294967295);
if (!str_restr && type->info.num.range) {
str_restr = type->info.num.range->expr;
}
break;
case LY_TYPE_UINT64:
kind = 0;
local_umin = __UINT64_C(0);
local_umax = __UINT64_C(18446744073709551615);
if (!str_restr && type->info.num.range) {
str_restr = type->info.num.range->expr;
}
break;
case LY_TYPE_STRING:
kind = 0;
local_umin = __UINT64_C(0);
local_umax = __UINT64_C(18446744073709551615);
if (!str_restr && type->info.str.length) {
str_restr = type->info.str.length->expr;
}
break;
default:
LOGINT;
return -1;
}
/* process superior types */
if (type->der) {
if (resolve_len_ran_interval(NULL, &type->der->type, &intv)) {
LOGINT;
return -1;
}
assert(!intv || (intv->kind == kind));
}
if (!str_restr) {
/* we do not have any restriction, return superior ones */
*ret = intv;
return EXIT_SUCCESS;
}
/* adjust local min and max */
if (intv) {
tmp_intv = intv;
if (kind == 0) {
local_umin = tmp_intv->value.uval.min;
} else if (kind == 1) {
local_smin = tmp_intv->value.sval.min;
} else if (kind == 2) {
local_fmin = tmp_intv->value.fval.min;
}
while (tmp_intv->next) {
tmp_intv = tmp_intv->next;
}
if (kind == 0) {
local_umax = tmp_intv->value.uval.max;
} else if (kind == 1) {
local_smax = tmp_intv->value.sval.max;
} else if (kind == 2) {
local_fmax = tmp_intv->value.fval.max;
}
}
/* finally parse our restriction */
seg_ptr = str_restr;
tmp_intv = NULL;
while (1) {
if (!tmp_local_intv) {
assert(!local_intv);
local_intv = malloc(sizeof *local_intv);
tmp_local_intv = local_intv;
} else {
tmp_local_intv->next = malloc(sizeof *tmp_local_intv);
tmp_local_intv = tmp_local_intv->next;
}
if (!tmp_local_intv) {
LOGMEM;
goto error;
}
tmp_local_intv->kind = kind;
tmp_local_intv->type = type;
tmp_local_intv->next = NULL;
/* min */
ptr = seg_ptr;
while (isspace(ptr[0])) {
++ptr;
}
if (isdigit(ptr[0]) || (ptr[0] == '+') || (ptr[0] == '-')) {
if (kind == 0) {
tmp_local_intv->value.uval.min = strtol(ptr, (char **)&ptr, 10);
} else if (kind == 1) {
tmp_local_intv->value.sval.min = strtol(ptr, (char **)&ptr, 10);
} else if (kind == 2) {
if (parse_range_dec64(&ptr, local_fdig, &tmp_local_intv->value.fval.min)) {
LOGVAL(LYE_INARG, LY_VLOG_NONE, NULL, ptr, "range");
goto error;
}
}
} else if (!strncmp(ptr, "min", 3)) {
if (kind == 0) {
tmp_local_intv->value.uval.min = local_umin;
} else if (kind == 1) {
tmp_local_intv->value.sval.min = local_smin;
} else if (kind == 2) {
tmp_local_intv->value.fval.min = local_fmin;
}
ptr += 3;
} else if (!strncmp(ptr, "max", 3)) {
if (kind == 0) {
tmp_local_intv->value.uval.min = local_umax;
} else if (kind == 1) {
tmp_local_intv->value.sval.min = local_smax;
} else if (kind == 2) {
tmp_local_intv->value.fval.min = local_fmax;
}
ptr += 3;
} else {
LOGINT;
goto error;
}
while (isspace(ptr[0])) {
ptr++;
}
/* no interval or interval */
if ((ptr[0] == '|') || !ptr[0]) {
if (kind == 0) {
tmp_local_intv->value.uval.max = tmp_local_intv->value.uval.min;
} else if (kind == 1) {
tmp_local_intv->value.sval.max = tmp_local_intv->value.sval.min;
} else if (kind == 2) {
tmp_local_intv->value.fval.max = tmp_local_intv->value.fval.min;
}
} else if (!strncmp(ptr, "..", 2)) {
/* skip ".." */
ptr += 2;
while (isspace(ptr[0])) {
++ptr;
}
/* max */
if (isdigit(ptr[0]) || (ptr[0] == '+') || (ptr[0] == '-')) {
if (kind == 0) {
tmp_local_intv->value.uval.max = strtol(ptr, (char **)&ptr, 10);
} else if (kind == 1) {
tmp_local_intv->value.sval.max = strtol(ptr, (char **)&ptr, 10);
} else if (kind == 2) {
if (parse_range_dec64(&ptr, local_fdig, &tmp_local_intv->value.fval.max)) {
LOGVAL(LYE_INARG, LY_VLOG_NONE, NULL, ptr, "range");
goto error;
}
}
} else if (!strncmp(ptr, "max", 3)) {
if (kind == 0) {
tmp_local_intv->value.uval.max = local_umax;
} else if (kind == 1) {
tmp_local_intv->value.sval.max = local_smax;
} else if (kind == 2) {
tmp_local_intv->value.fval.max = local_fmax;
}
} else {
LOGINT;
goto error;
}
} else {
LOGINT;
goto error;
}
/* check min and max in correct order*/
if (kind == 0) {
/* current segment */
if (tmp_local_intv->value.uval.min > tmp_local_intv->value.uval.max) {
goto error;
}
if (tmp_local_intv->value.uval.min < local_umin || tmp_local_intv->value.uval.max > local_umax) {
goto error;
}
/* segments sholud be ascending order */
if (tmp_intv && (tmp_intv->value.uval.max >= tmp_local_intv->value.uval.min)) {
goto error;
}
} else if (kind == 1) {
if (tmp_local_intv->value.sval.min > tmp_local_intv->value.sval.max) {
goto error;
}
if (tmp_local_intv->value.sval.min < local_smin || tmp_local_intv->value.sval.max > local_smax) {
goto error;
}
if (tmp_intv && (tmp_intv->value.sval.max >= tmp_local_intv->value.sval.min)) {
goto error;
}
} else if (kind == 2) {
if (tmp_local_intv->value.fval.min > tmp_local_intv->value.fval.max) {
goto error;
}
if (tmp_local_intv->value.fval.min < local_fmin || tmp_local_intv->value.fval.max > local_fmax) {
goto error;
}
if (tmp_intv && (tmp_intv->value.fval.max >= tmp_local_intv->value.fval.min)) {
/* fraction-digits value is always the same (it cannot be changed in derived types) */
goto error;
}
}
/* next segment (next OR) */
seg_ptr = strchr(seg_ptr, '|');
if (!seg_ptr) {
break;
}
seg_ptr++;
tmp_intv = tmp_local_intv;
}
/* check local restrictions against superior ones */
if (intv) {
tmp_intv = intv;
tmp_local_intv = local_intv;
while (tmp_local_intv && tmp_intv) {
/* reuse local variables */
if (kind == 0) {
local_umin = tmp_local_intv->value.uval.min;
local_umax = tmp_local_intv->value.uval.max;
/* it must be in this interval */
if ((local_umin >= tmp_intv->value.uval.min) && (local_umin <= tmp_intv->value.uval.max)) {
/* this interval is covered, next one */
if (local_umax <= tmp_intv->value.uval.max) {
tmp_local_intv = tmp_local_intv->next;
continue;
/* ascending order of restrictions -> fail */
} else {
goto error;
}
}
} else if (kind == 1) {
local_smin = tmp_local_intv->value.sval.min;
local_smax = tmp_local_intv->value.sval.max;
if ((local_smin >= tmp_intv->value.sval.min) && (local_smin <= tmp_intv->value.sval.max)) {
if (local_smax <= tmp_intv->value.sval.max) {
tmp_local_intv = tmp_local_intv->next;
continue;
} else {
goto error;
}
}
} else if (kind == 2) {
local_fmin = tmp_local_intv->value.fval.min;
local_fmax = tmp_local_intv->value.fval.max;
if ((dec64cmp(local_fmin, local_fdig, tmp_intv->value.fval.min, local_fdig) > -1)
&& (dec64cmp(local_fmin, local_fdig, tmp_intv->value.fval.max, local_fdig) < 1)) {
if (dec64cmp(local_fmax, local_fdig, tmp_intv->value.fval.max, local_fdig) < 1) {
tmp_local_intv = tmp_local_intv->next;
continue;
} else {
goto error;
}
}
}
tmp_intv = tmp_intv->next;
}
/* some interval left uncovered -> fail */
if (tmp_local_intv) {
goto error;
}
}
/* append the local intervals to all the intervals of the superior types, return it all */
if (intv) {
for (tmp_intv = intv; tmp_intv->next; tmp_intv = tmp_intv->next);
tmp_intv->next = local_intv;
} else {
intv = local_intv;
}
*ret = intv;
return EXIT_SUCCESS;
error:
while (intv) {
tmp_intv = intv->next;
free(intv);
intv = tmp_intv;
}
while (local_intv) {
tmp_local_intv = local_intv->next;
free(local_intv);
local_intv = tmp_local_intv;
}
return -1;
}
/**
* @brief Resolve a typedef, return only resolved typedefs if derived. If leafref, it must be
* resolved for this function to return it. Does not log.
*
* @param[in] name Typedef name.
* @param[in] mod_name Typedef name module name.
* @param[in] module Main module.
* @param[in] parent Parent of the resolved type definition.
* @param[out] ret Pointer to the resolved typedef. Can be NULL.
*
* @return EXIT_SUCCESS on success, EXIT_FAILURE on forward reference, -1 on error.
*/
int
resolve_superior_type(const char *name, const char *mod_name, const struct lys_module *module,
const struct lys_node *parent, struct lys_tpdf **ret)
{
int i, j;
struct lys_tpdf *tpdf, *match;
int tpdf_size;
if (!mod_name) {
/* no prefix, try built-in types */
for (i = 1; i < LY_DATA_TYPE_COUNT; i++) {
if (!strcmp(ly_types[i].def->name, name)) {
if (ret) {
*ret = ly_types[i].def;
}
return EXIT_SUCCESS;
}
}
} else {
if (!strcmp(mod_name, module->name)) {
/* prefix refers to the current module, ignore it */
mod_name = NULL;
}
}
if (!mod_name && parent) {
/* search in local typedefs */
while (parent) {
switch (parent->nodetype) {
case LYS_CONTAINER:
tpdf_size = ((struct lys_node_container *)parent)->tpdf_size;
tpdf = ((struct lys_node_container *)parent)->tpdf;
break;
case LYS_LIST:
tpdf_size = ((struct lys_node_list *)parent)->tpdf_size;
tpdf = ((struct lys_node_list *)parent)->tpdf;
break;
case LYS_GROUPING:
tpdf_size = ((struct lys_node_grp *)parent)->tpdf_size;
tpdf = ((struct lys_node_grp *)parent)->tpdf;
break;
case LYS_RPC:
case LYS_ACTION:
tpdf_size = ((struct lys_node_rpc_action *)parent)->tpdf_size;
tpdf = ((struct lys_node_rpc_action *)parent)->tpdf;
break;
case LYS_NOTIF:
tpdf_size = ((struct lys_node_notif *)parent)->tpdf_size;
tpdf = ((struct lys_node_notif *)parent)->tpdf;
break;
case LYS_INPUT:
case LYS_OUTPUT:
tpdf_size = ((struct lys_node_inout *)parent)->tpdf_size;
tpdf = ((struct lys_node_inout *)parent)->tpdf;
break;
default:
parent = lys_parent(parent);
continue;
}
for (i = 0; i < tpdf_size; i++) {
if (!strcmp(tpdf[i].name, name) && tpdf[i].type.base > 0) {
match = &tpdf[i];
goto check_leafref;
}
}
parent = lys_parent(parent);
}
} else {
/* get module where to search */
module = lys_get_import_module(module, NULL, 0, mod_name, 0);
if (!module) {
return -1;
}
}
/* search in top level typedefs */
for (i = 0; i < module->tpdf_size; i++) {
if (!strcmp(module->tpdf[i].name, name) && module->tpdf[i].type.base > 0) {
match = &module->tpdf[i];
goto check_leafref;
}
}
/* search in submodules */
for (i = 0; i < module->inc_size && module->inc[i].submodule; i++) {
for (j = 0; j < module->inc[i].submodule->tpdf_size; j++) {
if (!strcmp(module->inc[i].submodule->tpdf[j].name, name) && module->inc[i].submodule->tpdf[j].type.base > 0) {
match = &module->inc[i].submodule->tpdf[j];
goto check_leafref;
}
}
}
return EXIT_FAILURE;
check_leafref:
if (ret) {
*ret = match;
}
if (match->type.base == LY_TYPE_LEAFREF) {
while (!match->type.info.lref.path) {
match = match->type.der;
assert(match);
}
}
return EXIT_SUCCESS;
}
/**
* @brief Check the default \p value of the \p type. Logs directly.
*
* @param[in] type Type definition to use.
* @param[in] value Default value to check.
* @param[in] module Type module.
*
* @return EXIT_SUCCESS on success, EXIT_FAILURE on forward reference, -1 on error.
*/
static int
check_default(struct lys_type *type, const char *value, struct lys_module *module)
{
struct lys_tpdf *base_tpdf = NULL;
struct lyd_node_leaf_list node;
int ret = EXIT_SUCCESS;
if (type->base <= LY_TYPE_DER) {
/* the type was not resolved yet, nothing to do for now */
return EXIT_FAILURE;
}
if (!value) {
/* we do not have a new default value, so is there any to check even, in some base type? */
for (base_tpdf = type->der; base_tpdf->type.der; base_tpdf = base_tpdf->type.der) {
if (base_tpdf->dflt) {
value = base_tpdf->dflt;
break;
}
}
if (!value) {
/* no default value, nothing to check, all is well */
return EXIT_SUCCESS;
}
/* so there is a default value in a base type, but can the default value be no longer valid (did we define some new restrictions)? */
switch (type->base) {
case LY_TYPE_IDENT:
case LY_TYPE_INST:
case LY_TYPE_LEAFREF:
case LY_TYPE_BOOL:
case LY_TYPE_EMPTY:
/* these have no restrictions, so we would do the exact same work as the unres in the base typedef */
return EXIT_SUCCESS;
case LY_TYPE_BITS:
/* the default value must match the restricted list of values, if the type was restricted */
if (type->info.bits.count) {
break;
}
return EXIT_SUCCESS;
case LY_TYPE_ENUM:
/* the default value must match the restricted list of values, if the type was restricted */
if (type->info.enums.count) {
break;
}
return EXIT_SUCCESS;
case LY_TYPE_DEC64:
if (type->info.dec64.range) {
break;
}
return EXIT_SUCCESS;
case LY_TYPE_BINARY:
if (type->info.binary.length) {
break;
}
return EXIT_SUCCESS;
case LY_TYPE_INT8:
case LY_TYPE_INT16:
case LY_TYPE_INT32:
case LY_TYPE_INT64:
case LY_TYPE_UINT8:
case LY_TYPE_UINT16:
case LY_TYPE_UINT32:
case LY_TYPE_UINT64:
if (type->info.num.range) {
break;
}
return EXIT_SUCCESS;
case LY_TYPE_STRING:
if (type->info.str.length || type->info.str.patterns) {
break;
}
return EXIT_SUCCESS;
case LY_TYPE_UNION:
/* way too much trouble learning whether we need to check the default again, so just do it */
break;
default:
LOGINT;
return -1;
}
} else if (type->base == LY_TYPE_EMPTY) {
LOGVAL(LYE_INCHILDSTMT, LY_VLOG_NONE, NULL, "default", type->parent->name);
LOGVAL(LYE_SPEC, LY_VLOG_NONE, NULL, "The \"empty\" data type cannot have a default value.");
return -1;
}
/* dummy leaf */
memset(&node, 0, sizeof node);
node.value_str = value;
node.value_type = type->base;
node.schema = calloc(1, sizeof (struct lys_node_leaf));
if (!node.schema) {
LOGMEM;
return -1;
}
node.schema->name = strdup("fake-default");
if (!node.schema->name) {
LOGMEM;
free(node.schema);
return -1;
}
node.schema->module = module;
memcpy(&((struct lys_node_leaf *)node.schema)->type, type, sizeof *type);
if (type->base == LY_TYPE_LEAFREF) {
if (!type->info.lref.target) {
ret = EXIT_FAILURE;
goto finish;
}
ret = check_default(&type->info.lref.target->type, value, module);
} else if ((type->base == LY_TYPE_INST) || (type->base == LY_TYPE_IDENT)) {
/* it was converted to JSON format before, nothing else sensible we can do */
} else {
if (lyp_parse_value(&node, NULL, 1)) {
ret = -1;
if (base_tpdf) {
/* default value was is defined in some base typedef */
if ((type->base == LY_TYPE_BITS && type->der->type.der) ||
(type->base == LY_TYPE_ENUM && type->der->type.der)) {
/* we have refined bits/enums */
LOGVAL(LYE_SPEC, LY_VLOG_NONE, NULL,
"Invalid value \"%s\" of the default statement inherited to \"%s\" from \"%s\" base type.",
value, type->parent->name, base_tpdf->name);
}
}
}
}
finish:
if (node.value_type == LY_TYPE_BITS) {
free(node.value.bit);
}
free((char *)node.schema->name);
free(node.schema);
return ret;
}
/**
* @brief Check a key for mandatory attributes. Logs directly.
*
* @param[in] key The key to check.
* @param[in] flags What flags to check.
* @param[in] list The list of all the keys.
* @param[in] index Index of the key in the key list.
* @param[in] name The name of the keys.
* @param[in] len The name length.
*
* @return EXIT_SUCCESS on success, -1 on error.
*/
static int
check_key(struct lys_node_list *list, int index, const char *name, int len)
{
struct lys_node_leaf *key = list->keys[index];
char *dup = NULL;
int j;
/* existence */
if (!key) {
if (name[len] != '\0') {
dup = strdup(name);
if (!dup) {
LOGMEM;
return -1;
}
dup[len] = '\0';
name = dup;
}
LOGVAL(LYE_KEY_MISS, LY_VLOG_LYS, list, name);
free(dup);
return -1;
}
/* uniqueness */
for (j = index - 1; j >= 0; j--) {
if (key == list->keys[j]) {
LOGVAL(LYE_KEY_DUP, LY_VLOG_LYS, list, key->name);
return -1;
}
}
/* key is a leaf */
if (key->nodetype != LYS_LEAF) {
LOGVAL(LYE_KEY_NLEAF, LY_VLOG_LYS, list, key->name);
return -1;
}
/* type of the leaf is not built-in empty */
if (key->type.base == LY_TYPE_EMPTY && key->module->version < 2) {
LOGVAL(LYE_KEY_TYPE, LY_VLOG_LYS, list, key->name);
return -1;
}
/* config attribute is the same as of the list */
if ((list->flags & LYS_CONFIG_MASK) != (key->flags & LYS_CONFIG_MASK)) {
LOGVAL(LYE_KEY_CONFIG, LY_VLOG_LYS, list, key->name);
return -1;
}
/* key is not placed from augment */
if (key->parent->nodetype == LYS_AUGMENT) {
LOGVAL(LYE_KEY_MISS, LY_VLOG_LYS, key, key->name);
LOGVAL(LYE_SPEC, LY_VLOG_LYS, key, "Key inserted from augment.");
return -1;
}
/* key is not when/if-feature -conditional */
j = 0;
if (key->when || (key->iffeature_size && (j = 1))) {
LOGVAL(LYE_INCHILDSTMT, LY_VLOG_LYS, key, j ? "if-feature" : "when", "leaf");
LOGVAL(LYE_SPEC, LY_VLOG_LYS, key, "Key definition cannot depend on a \"%s\" condition.",
j ? "if-feature" : "when");
return -1;
}
return EXIT_SUCCESS;
}
/**
* @brief Resolve (test the target exists) unique. Logs directly.
*
* @param[in] parent The parent node of the unique structure.
* @param[in] uniq_str_path One path from the unique string.
*
* @return EXIT_SUCCESS on succes, EXIT_FAILURE on forward reference, -1 on error.
*/
int
resolve_unique(struct lys_node *parent, const char *uniq_str_path, uint8_t *trg_type)
{
int rc;
const struct lys_node *leaf = NULL;
rc = resolve_descendant_schema_nodeid(uniq_str_path, parent->child, LYS_LEAF, 1, 1, &leaf);
if (rc || !leaf) {
if (rc) {
LOGVAL(LYE_INARG, LY_VLOG_LYS, parent, uniq_str_path, "unique");
if (rc > 0) {
LOGVAL(LYE_INCHAR, LY_VLOG_LYS, parent, uniq_str_path[rc - 1], &uniq_str_path[rc - 1]);
} else if (rc == -2) {
LOGVAL(LYE_SPEC, LY_VLOG_LYS, parent, "Unique argument references list.");
}
rc = -1;
} else {
LOGVAL(LYE_INARG, LY_VLOG_LYS, parent, uniq_str_path, "unique");
LOGVAL(LYE_SPEC, LY_VLOG_LYS, parent, "Target leaf not found.");
rc = EXIT_FAILURE;
}
goto error;
}
if (leaf->nodetype != LYS_LEAF) {
LOGVAL(LYE_INARG, LY_VLOG_LYS, parent, uniq_str_path, "unique");
LOGVAL(LYE_SPEC, LY_VLOG_LYS, parent, "Target is not a leaf.");
return -1;
}
/* check status */
if (lyp_check_status(parent->flags, parent->module, parent->name, leaf->flags, leaf->module, leaf->name, leaf)) {
return -1;
}
/* check that all unique's targets are of the same config type */
if (*trg_type) {
if (((*trg_type == 1) && (leaf->flags & LYS_CONFIG_R)) || ((*trg_type == 2) && (leaf->flags & LYS_CONFIG_W))) {
LOGVAL(LYE_INARG, LY_VLOG_LYS, parent, uniq_str_path, "unique");
LOGVAL(LYE_SPEC, LY_VLOG_LYS, parent,
"Leaf \"%s\" referenced in unique statement is config %s, but previous referenced leaf is config %s.",
uniq_str_path, *trg_type == 1 ? "false" : "true", *trg_type == 1 ? "true" : "false");
return -1;
}
} else {
/* first unique */
if (leaf->flags & LYS_CONFIG_W) {
*trg_type = 1;
} else {
*trg_type = 2;
}
}
/* set leaf's unique flag */
((struct lys_node_leaf *)leaf)->flags |= LYS_UNIQUE;
return EXIT_SUCCESS;
error:
return rc;
}
void
unres_data_del(struct unres_data *unres, uint32_t i)
{
/* there are items after the one deleted */
if (i+1 < unres->count) {
/* we only move the data, memory is left allocated, why bother */
memmove(&unres->node[i], &unres->node[i+1], (unres->count-(i+1)) * sizeof *unres->node);
/* deleting the last item */
} else if (i == 0) {
free(unres->node);
unres->node = NULL;
}
/* if there are no items after and it is not the last one, just move the counter */
--unres->count;
}
/**
* @brief Resolve (find) a data node from a specific module. Does not log.
*
* @param[in] mod Module to search in.
* @param[in] name Name of the data node.
* @param[in] nam_len Length of the name.
* @param[in] start Data node to start the search from.
* @param[in,out] parents Resolved nodes. If there are some parents,
* they are replaced (!!) with the resolvents.
*
* @return EXIT_SUCCESS on success, EXIT_FAILURE on forward reference, -1 on error.
*/
static int
resolve_data(const struct lys_module *mod, const char *name, int nam_len, struct lyd_node *start, struct unres_data *parents)
{
struct lyd_node *node;
int flag;
uint32_t i;
if (!parents->count) {
parents->count = 1;
parents->node = malloc(sizeof *parents->node);
if (!parents->node) {
LOGMEM;
return -1;
}
parents->node[0] = NULL;
}
for (i = 0; i < parents->count;) {
if (parents->node[i] && (parents->node[i]->schema->nodetype & (LYS_LEAF | LYS_LEAFLIST | LYS_ANYDATA))) {
/* skip */
++i;
continue;
}
flag = 0;
LY_TREE_FOR(parents->node[i] ? parents->node[i]->child : start, node) {
if (node->schema->module == mod && !strncmp(node->schema->name, name, nam_len)
&& node->schema->name[nam_len] == '\0') {
/* matching target */
if (!flag) {
/* put node instead of the current parent */
parents->node[i] = node;
flag = 1;
} else {
/* multiple matching, so create a new node */
++parents->count;
parents->node = ly_realloc(parents->node, parents->count * sizeof *parents->node);
if (!parents->node) {
return EXIT_FAILURE;
}
parents->node[parents->count-1] = node;
++i;
}
}
}
if (!flag) {
/* remove item from the parents list */
unres_data_del(parents, i);
} else {
++i;
}
}
return parents->count ? EXIT_SUCCESS : EXIT_FAILURE;
}
/**
* @brief Resolve (find) a data node. Does not log.
*
* @param[in] mod_name Module name of the data node.
* @param[in] mod_name_len Length of the module name.
* @param[in] name Name of the data node.
* @param[in] nam_len Length of the name.
* @param[in] start Data node to start the search from.
* @param[in,out] parents Resolved nodes. If there are some parents,
* they are replaced (!!) with the resolvents.
*
* @return EXIT_SUCCESS on success, EXIT_FAILURE on forward reference, -1 otherwise.
*/
static int
resolve_data_node(const char *mod_name, int mod_name_len, const char *name, int name_len, struct lyd_node *start,
struct unres_data *parents)
{
const struct lys_module *mod;
char *str;
assert(start);
if (mod_name) {
/* we have mod_name, find appropriate module */
str = strndup(mod_name, mod_name_len);
if (!str) {
LOGMEM;
return -1;
}
mod = ly_ctx_get_module(start->schema->module->ctx, str, NULL);
free(str);
if (!mod) {
/* invalid prefix */
return -1;
}
} else {
/* no prefix, module is the same as of current node */
mod = start->schema->module;
}
return resolve_data(mod, name, name_len, start, parents);
}
/**
* @brief Resolve a path predicate (leafref) in JSON data context. Logs directly
* only specific errors, general no-resolvent error is left to the caller.
*
* @param[in] pred Predicate to use.
* @param[in] node Node from which the predicate is being resolved
* @param[in,out] node_match Nodes satisfying the restriction
* without the predicate. Nodes not
* satisfying the predicate are removed.
* @param[out] parsed Number of characters parsed, negative on error.
*
* @return EXIT_SUCCESS on success, EXIT_FAILURE on forward reference, -1 on error.
*/
static int
resolve_path_predicate_data(const char *pred, struct lyd_node *node, struct unres_data *node_match,
int *parsed)
{
/* ... /node[source = destination] ... */
struct unres_data source_match, dest_match;
const char *path_key_expr, *source, *sour_pref, *dest, *dest_pref;
int pke_len, sour_len, sour_pref_len, dest_len, dest_pref_len, parsed_loc = 0, pke_parsed = 0;
int has_predicate, dest_parent_times, i, rc;
uint32_t j;
struct lyd_node_leaf_list *leaf_dst, *leaf_src;
source_match.count = 1;
source_match.node = malloc(sizeof *source_match.node);
if (!source_match.node) {
LOGMEM;
return -1;
}
dest_match.count = 1;
dest_match.node = malloc(sizeof *dest_match.node);
if (!dest_match.node) {
LOGMEM;
return -1;
}
do {
if ((i = parse_path_predicate(pred, &sour_pref, &sour_pref_len, &source, &sour_len, &path_key_expr,
&pke_len, &has_predicate)) < 1) {
LOGVAL(LYE_INCHAR, LY_VLOG_LYD, node, pred[-i], &pred[-i]);
rc = -1;
goto error;
}
parsed_loc += i;
pred += i;
for (j = 0; j < node_match->count;) {
/* source */
source_match.node[0] = node_match->node[j];
/* must be leaf (key of a list) */
if ((rc = resolve_data_node(sour_pref, sour_pref_len, source, sour_len, node_match->node[j],
&source_match)) || (source_match.count != 1) || (source_match.node[0]->schema->nodetype != LYS_LEAF)) {
i = 0;
goto error;
}
/* destination */
dest_match.node[0] = node;
dest_parent_times = 0;
if ((i = parse_path_key_expr(path_key_expr, &dest_pref, &dest_pref_len, &dest, &dest_len,
&dest_parent_times)) < 1) {
LOGVAL(LYE_INCHAR, LY_VLOG_LYD, node, path_key_expr[-i], &path_key_expr[-i]);
rc = -1;
goto error;
}
pke_parsed = i;
for (i = 0; i < dest_parent_times; ++i) {
dest_match.node[0] = dest_match.node[0]->parent;
if (!dest_match.node[0]) {
i = 0;
rc = EXIT_FAILURE;
goto error;
}
}
while (1) {
if ((rc = resolve_data_node(dest_pref, dest_pref_len, dest, dest_len, dest_match.node[0],
&dest_match)) || (dest_match.count != 1)) {
i = 0;
goto error;
}
if (pke_len == pke_parsed) {
break;
}
if ((i = parse_path_key_expr(path_key_expr+pke_parsed, &dest_pref, &dest_pref_len, &dest, &dest_len,
&dest_parent_times)) < 1) {
LOGVAL(LYE_INCHAR, LY_VLOG_LYD, node, path_key_expr[-i], &path_key_expr[-i]);
rc = -1;
goto error;
}
pke_parsed += i;
}
/* check match between source and destination nodes */
leaf_dst = (struct lyd_node_leaf_list *)dest_match.node[0];
while (leaf_dst->value_type == LY_TYPE_LEAFREF) {
leaf_dst = (struct lyd_node_leaf_list *)leaf_dst->value.leafref;
}
leaf_src = (struct lyd_node_leaf_list *)source_match.node[0];
while (leaf_src->value_type == LY_TYPE_LEAFREF) {
leaf_src = (struct lyd_node_leaf_list *)leaf_src->value.leafref;
}
if (leaf_src->value_type != leaf_dst->value_type) {
goto remove_leafref;
}
if (!ly_strequal(leaf_src->value_str, leaf_dst->value_str, 1)) {
goto remove_leafref;
}
/* leafref is ok, continue check with next leafref */
++j;
continue;
remove_leafref:
/* does not fulfill conditions, remove leafref record */
unres_data_del(node_match, j);
}
} while (has_predicate);
free(source_match.node);
free(dest_match.node);
if (parsed) {
*parsed = parsed_loc;
}
return EXIT_SUCCESS;
error:
if (source_match.count) {
free(source_match.node);
}
if (dest_match.count) {
free(dest_match.node);
}
if (parsed) {
*parsed = -parsed_loc+i;
}
return rc;
}
/**
* @brief Resolve a path (leafref) in JSON data context. Logs directly.
*
* @param[in] node Leafref data node.
* @param[in] path Path of the leafref.
* @param[out] ret Matching nodes. Expects an empty, but allocated structure.
*
* @return EXIT_SUCCESS on success, EXIT_FAILURE on forward reference, -1 otherwise.
*/
static int
resolve_path_arg_data(struct lyd_node *node, const char *path, struct unres_data *ret)
{
struct lyd_node *data = NULL;
const char *prefix, *name;
int pref_len, nam_len, has_predicate, parent_times, i, parsed, rc;
uint32_t j;
assert(node && path && ret && !ret->count);
parent_times = 0;
parsed = 0;
/* searching for nodeset */
do {
if ((i = parse_path_arg(path, &prefix, &pref_len, &name, &nam_len, &parent_times, &has_predicate)) < 1) {
LOGVAL(LYE_INCHAR, LY_VLOG_LYD, node, path[-i], &path[-i]);
rc = -1;
goto error;
}
path += i;
parsed += i;
if (!ret->count) {
if (parent_times > 0) {
data = node;
for (i = 1; i < parent_times; ++i) {
data = data->parent;
}
} else if (!parent_times) {
data = node->child;
} else {
/* absolute path */
for (data = node; data->parent; data = data->parent);
}
/* we may still be parsing it and the pointer is not correct yet */
if (data->prev) {
while (data->prev->next) {
data = data->prev;
}
}
}
/* node identifier */
if ((rc = resolve_data_node(prefix, pref_len, name, nam_len, data, ret))) {
if (rc == -1) {
LOGVAL(LYE_INELEM_LEN, LY_VLOG_LYD, node, nam_len, name);
}
goto error;
}
if (has_predicate) {
/* we have predicate, so the current results must be lists */
for (j = 0; j < ret->count;) {
if (ret->node[j]->schema->nodetype == LYS_LIST &&
((struct lys_node_list *)ret->node[0]->schema)->keys) {
/* leafref is ok, continue check with next leafref */
++j;
continue;
}
/* does not fulfill conditions, remove leafref record */
unres_data_del(ret, j);
}
if ((rc = resolve_path_predicate_data(path, node, ret, &i))) {
if (rc == -1) {
LOGVAL(LYE_NORESOLV, LY_VLOG_LYD, node, "leafref", path);
}
goto error;
}
path += i;
parsed += i;
if (!ret->count) {
rc = EXIT_FAILURE;
goto error;
}
}
} while (path[0] != '\0');
return EXIT_SUCCESS;
error:
free(ret->node);
ret->node = NULL;
ret->count = 0;
return rc;
}
static int
resolve_path_arg_schema_valid_dep_flag(const struct lys_node *op_node, const struct lys_node *first_node, int abs_path)
{
int dep1, dep2;
const struct lys_node *node;
if (lys_parent(op_node)) {
/* inner operation (notif/action) */
if (abs_path) {
return 1;
} else {
/* compare depth of both nodes */
for (dep1 = 0, node = op_node; lys_parent(node); node = lys_parent(node));
for (dep2 = 0, node = first_node; lys_parent(node); node = lys_parent(node));
if ((dep2 > dep1) || ((dep2 == dep1) && (op_node != first_node))) {
return 1;
}
}
} else {
/* top-level operation (notif/rpc) */
if (op_node != first_node) {
return 1;
}
}
return 0;
}
/**
* @brief Resolve a path (leafref) predicate in JSON schema context. Logs directly.
*
* @param[in] path Path to use.
* @param[in] context_node Predicate context node (where the predicate is placed).
* @param[in] parent Path context node (where the path begins/is placed).
* @param[in] op_node Optional node if the leafref is in an operation (action/rpc/notif).
*
* @return 0 on forward reference, otherwise the number
* of characters successfully parsed,
* positive on success, negative on failure.
*/
static int
resolve_path_predicate_schema(const char *path, const struct lys_node *context_node,
struct lys_node *parent, const struct lys_node *op_node)
{
const struct lys_node *src_node, *dst_node;
const char *path_key_expr, *source, *sour_pref, *dest, *dest_pref;
int pke_len, sour_len, sour_pref_len, dest_len, dest_pref_len, parsed = 0, pke_parsed = 0;
int has_predicate, dest_parent_times = 0, i, rc, first_iter;
do {
if ((i = parse_path_predicate(path, &sour_pref, &sour_pref_len, &source, &sour_len, &path_key_expr,
&pke_len, &has_predicate)) < 1) {
LOGVAL(LYE_INCHAR, parent ? LY_VLOG_LYS : LY_VLOG_NONE, parent, path[-i], path-i);
return -parsed+i;
}
parsed += i;
path += i;
/* source (must be leaf) */
if (!sour_pref) {
sour_pref = context_node->module->name;
}
rc = lys_get_sibling(context_node->child, sour_pref, sour_pref_len, source, sour_len,
LYS_LEAF | LYS_LEAFLIST | LYS_AUGMENT, &src_node);
if (rc) {
LOGVAL(LYE_NORESOLV, parent ? LY_VLOG_LYS : LY_VLOG_NONE, parent, "leafref predicate", path-parsed);
return 0;
}
/* destination */
if ((i = parse_path_key_expr(path_key_expr, &dest_pref, &dest_pref_len, &dest, &dest_len,
&dest_parent_times)) < 1) {
LOGVAL(LYE_INCHAR, parent ? LY_VLOG_LYS : LY_VLOG_NONE, parent, path_key_expr[-i], path_key_expr-i);
return -parsed;
}
pke_parsed += i;
for (i = 0, dst_node = parent; i < dest_parent_times; ++i) {
/* path is supposed to be evaluated in data tree, so we have to skip
* all schema nodes that cannot be instantiated in data tree */
for (dst_node = lys_parent(dst_node);
dst_node && !(dst_node->nodetype & (LYS_CONTAINER | LYS_LIST | LYS_ACTION | LYS_NOTIF | LYS_RPC));
dst_node = lys_parent(dst_node));
if (!dst_node) {
LOGVAL(LYE_NORESOLV, parent ? LY_VLOG_LYS : LY_VLOG_NONE, parent, "leafref predicate", path_key_expr);
return 0;
}
}
first_iter = 1;
while (1) {
if (!dest_pref) {
dest_pref = dst_node->module->name;
}
rc = lys_get_sibling(dst_node->child, dest_pref, dest_pref_len, dest, dest_len,
LYS_CONTAINER | LYS_LIST | LYS_LEAF | LYS_AUGMENT, &dst_node);
if (rc) {
LOGVAL(LYE_NORESOLV, parent ? LY_VLOG_LYS : LY_VLOG_NONE, parent, "leafref predicate", path_key_expr);
return 0;
}
if (first_iter) {
if (resolve_path_arg_schema_valid_dep_flag(op_node, dst_node, 0)) {
parent->flags |= LYS_VALID_DEP;
}
first_iter = 0;
}
if (pke_len == pke_parsed) {
break;
}
if ((i = parse_path_key_expr(path_key_expr+pke_parsed, &dest_pref, &dest_pref_len, &dest, &dest_len,
&dest_parent_times)) < 1) {
LOGVAL(LYE_INCHAR, parent ? LY_VLOG_LYS : LY_VLOG_NONE, parent,
(path_key_expr+pke_parsed)[-i], (path_key_expr+pke_parsed)-i);
return -parsed;
}
pke_parsed += i;
}
/* check source - dest match */
if (dst_node->nodetype != src_node->nodetype) {
LOGVAL(LYE_NORESOLV, parent ? LY_VLOG_LYS : LY_VLOG_NONE, parent, "leafref predicate", path-parsed);
LOGVAL(LYE_SPEC, parent ? LY_VLOG_LYS : LY_VLOG_NONE, parent, "Destination node is not a %s, but a %s.",
strnodetype(src_node->nodetype), strnodetype(dst_node->nodetype));
return -parsed;
}
} while (has_predicate);
return parsed;
}
/**
* @brief Resolve a path (leafref) in JSON schema context. Logs directly.
*
* @param[in] path Path to use.
* @param[in] parent_node Parent of the leafref.
* @param[in] parent_tpdf Flag if the parent node is actually typedef, in that case the path
* has to contain absolute path
* @param[out] ret Pointer to the resolved schema node. Can be NULL.
*
* @return EXIT_SUCCESS on success, EXIT_FAILURE on forward reference, -1 on error.
*/
static int
resolve_path_arg_schema(const char *path, struct lys_node *parent, int parent_tpdf,
const struct lys_node **ret)
{
const struct lys_node *node, *op_node = NULL;
const struct lys_module *mod, *mod2;
const char *id, *prefix, *name;
int pref_len, nam_len, parent_times, has_predicate;
int i, first_iter, rc;
first_iter = 1;
parent_times = 0;
id = path;
/* find operation schema we are in, if applicable */
if (!parent_tpdf) {
for (op_node = lys_parent(parent);
op_node && !(op_node->nodetype & (LYS_ACTION | LYS_NOTIF | LYS_RPC));
op_node = lys_parent(op_node));
}
mod2 = lys_node_module(parent);
do {
if ((i = parse_path_arg(id, &prefix, &pref_len, &name, &nam_len, &parent_times, &has_predicate)) < 1) {
LOGVAL(LYE_INCHAR, parent_tpdf ? LY_VLOG_NONE : LY_VLOG_LYS, parent_tpdf ? NULL : parent, id[-i], &id[-i]);
return -1;
}
id += i;
if (first_iter) {
if (parent_times == -1) {
/* resolve prefix of the module */
mod = lys_get_import_module(parent->module, NULL, 0, prefix, pref_len);
mod = lys_get_implemented_module(mod);
/* get start node */
node = mod ? mod->data : NULL;
if (!node) {
LOGVAL(LYE_NORESOLV, parent_tpdf ? LY_VLOG_NONE : LY_VLOG_LYS, parent_tpdf ? NULL : parent,
"leafref", path);
return EXIT_FAILURE;
}
} else if (parent_times > 0) {
if (parent_tpdf) {
/* the path is not allowed to contain relative path since we are in top level typedef */
LOGVAL(LYE_NORESOLV, 0, NULL, "leafref", path);
return -1;
}
/* we are looking for a sibling of a node, node it's parent (that is why parent_times - 1) */
for (i = 0, node = parent; i < parent_times - 1; i++) {
/* path is supposed to be evaluated in data tree, so we have to skip
* all schema nodes that cannot be instantiated in data tree */
for (node = lys_parent(node);
node && !(node->nodetype & (LYS_CONTAINER | LYS_LIST | LYS_ACTION | LYS_NOTIF | LYS_RPC));
node = lys_parent(node));
if (!node) {
LOGVAL(LYE_NORESOLV, LY_VLOG_LYS, parent, "leafref", path);
return EXIT_FAILURE;
}
}
} else {
LOGINT;
return -1;
}
} else {
/* move down the tree, if possible */
if (node->nodetype & (LYS_LEAF | LYS_LEAFLIST | LYS_ANYDATA)) {
LOGVAL(LYE_INCHAR, parent_tpdf ? LY_VLOG_NONE : LY_VLOG_LYS, parent_tpdf ? NULL : parent, name[0], name);
return -1;
}
node = node->child;
if (!node) {
LOGVAL(LYE_NORESOLV, parent_tpdf ? LY_VLOG_NONE : LY_VLOG_LYS, parent_tpdf ? NULL : parent,
"leafref", path);
return EXIT_FAILURE;
}
}
if (!prefix) {
prefix = lys_node_module(parent)->name;
}
rc = lys_get_sibling(node, prefix, pref_len, name, nam_len, LYS_ANY & ~(LYS_USES | LYS_GROUPING), &node);
if (rc) {
LOGVAL(LYE_NORESOLV, parent_tpdf ? LY_VLOG_NONE : LY_VLOG_LYS, parent_tpdf ? NULL : parent, "leafref", path);
return EXIT_FAILURE;
}
if (first_iter) {
/* set external dependency flag, we can decide based on the first found node */
if (!parent_tpdf && op_node && parent_times &&
resolve_path_arg_schema_valid_dep_flag(op_node, node, (parent_times == -1 ? 1 : 0))) {
parent->flags |= LYS_VALID_DEP;
}
first_iter = 0;
}
if (has_predicate) {
/* we have predicate, so the current result must be list */
if (node->nodetype != LYS_LIST) {
LOGVAL(LYE_NORESOLV, parent_tpdf ? LY_VLOG_NONE : LY_VLOG_LYS, parent_tpdf ? NULL : parent, "leafref", path);
return -1;
}
i = resolve_path_predicate_schema(id, node, parent, op_node);
if (i <= 0) {
if (i == 0) {
return EXIT_FAILURE;
} else { /* i < 0 */
return -1;
}
}
id += i;
}
mod = lys_node_module(node);
if (!mod->implemented && mod != mod2) {
/* set the module implemented */
if (lys_set_implemented(mod)) {
return -1;
}
}
} while (id[0]);
/* the target must be leaf or leaf-list (in YANG 1.1 only) */
if ((node->nodetype != LYS_LEAF) && ((lys_node_module(parent)->version != 2) || (node->nodetype != LYS_LEAFLIST))) {
LOGVAL(LYE_NORESOLV, parent_tpdf ? LY_VLOG_NONE : LY_VLOG_LYS, parent_tpdf ? NULL : parent, "leafref", path);
LOGVAL(LYE_SPEC, parent_tpdf ? LY_VLOG_NONE : LY_VLOG_LYS, parent_tpdf ? NULL : parent,
"Leafref target \"%s\" is not a leaf%s.", path,
lys_node_module(parent)->version != 2 ? "" : " nor a leaf-list");
return -1;
}
/* check status */
if (lyp_check_status(parent->flags, parent->module, parent->name,
node->flags, node->module, node->name, node)) {
return -1;
}
if (ret) {
*ret = node;
}
return EXIT_SUCCESS;
}
/**
* @brief Resolve instance-identifier predicate in JSON data format.
* Does not log.
*
* @param[in] pred Predicate to use.
* @param[in,out] node_match Nodes matching the restriction without
* the predicate. Nodes not satisfying
* the predicate are removed.
*
* @return Number of characters successfully parsed,
* positive on success, negative on failure.
*/
static int
resolve_predicate(const char *pred, struct unres_data *node_match)
{
/* ... /node[target = value] ... */
struct lyd_node *target;
const char *model, *name, *value;
int mod_len, nam_len, val_len, i, has_predicate, cur_idx, idx, parsed, pred_iter, k;
uint32_t j;
assert(pred && node_match->count);
idx = -1;
parsed = 0;
pred_iter = -1;
do {
if ((i = parse_predicate(pred, &model, &mod_len, &name, &nam_len, &value, &val_len, &has_predicate)) < 1) {
return -parsed+i;
}
parsed += i;
pred += i;
if (isdigit(name[0])) {
/* pos */
assert(!value);
idx = atoi(name);
} else if (name[0] != '.') {
/* list keys */
if (pred_iter < 0) {
pred_iter = 1;
} else {
++pred_iter;
}
}
for (cur_idx = 1, j = 0; j < node_match->count; ++cur_idx) {
/* target */
if (name[0] == '.') {
/* leaf-list value */
if (node_match->node[j]->schema->nodetype != LYS_LEAFLIST) {
goto remove_instid;
}
target = node_match->node[j];
/* check the value */
if (strncmp(((struct lyd_node_leaf_list *)target)->value_str, value, val_len)
|| ((struct lyd_node_leaf_list *)target)->value_str[val_len]) {
goto remove_instid;
}
} else if (!value) {
/* keyless list position */
if ((node_match->node[j]->schema->nodetype != LYS_LIST)
|| ((struct lys_node_list *)node_match->node[j]->schema)->keys) {
goto remove_instid;
}
if (idx != cur_idx) {
goto remove_instid;
}
} else {
/* list key value */
if (node_match->node[j]->schema->nodetype != LYS_LIST) {
goto remove_instid;
}
/* key module must match the list module */
if (strncmp(node_match->node[j]->schema->module->name, model, mod_len)
|| node_match->node[j]->schema->module->name[mod_len]) {
goto remove_instid;
}
/* find the key leaf */
for (k = 1, target = node_match->node[j]->child; target && (k < pred_iter); k++, target = target->next);
if (!target) {
goto remove_instid;
}
if ((struct lys_node_leaf *)target->schema !=
((struct lys_node_list *)node_match->node[j]->schema)->keys[pred_iter - 1]) {
goto remove_instid;
}
/* check the value */
if (strncmp(((struct lyd_node_leaf_list *)target)->value_str, value, val_len)
|| ((struct lyd_node_leaf_list *)target)->value_str[val_len]) {
goto remove_instid;
}
}
/* instid is ok, continue check with the next one */
++j;
continue;
remove_instid:
/* does not fulfill conditions, remove instid record */
unres_data_del(node_match, j);
}
} while (has_predicate);
/* check that all list keys were specified */
if ((pred_iter > 0) && node_match->count) {
j = 0;
while (j < node_match->count) {
assert(node_match->node[j]->schema->nodetype == LYS_LIST);
if (pred_iter < ((struct lys_node_list *)node_match->node[j]->schema)->keys_size) {
/* not enough predicates, just remove the list instance */
unres_data_del(node_match, j);
} else {
++j;
}
}
if (!node_match->count) {
LOGVAL(LYE_SPEC, LY_VLOG_NONE, NULL, "Instance identifier is missing some list keys.");
}
}
return parsed;
}
/**
* @brief Resolve instance-identifier in JSON data format. Logs directly.
*
* @param[in] data Data node where the path is used
* @param[in] path Instance-identifier node value.
*
* @return Matching node or NULL if no such a node exists. If error occurs, NULL is returned and ly_errno is set.
*/
static struct lyd_node *
resolve_instid(struct lyd_node *data, const char *path)
{
int i = 0, j;
struct lyd_node *result = NULL;
const struct lys_module *mod;
struct ly_ctx *ctx = data->schema->module->ctx;
const char *model, *name;
char *str;
int mod_len, name_len, has_predicate;
struct unres_data node_match;
memset(&node_match, 0, sizeof node_match);
/* we need root to resolve absolute path */
for (; data->parent; data = data->parent);
/* we're still parsing it and the pointer is not correct yet */
if (data->prev) {
for (; data->prev->next; data = data->prev);
}
/* search for the instance node */
while (path[i]) {
j = parse_instance_identifier(&path[i], &model, &mod_len, &name, &name_len, &has_predicate);
if (j <= 0) {
LOGVAL(LYE_INCHAR, LY_VLOG_LYD, data, path[i-j], &path[i-j]);
goto error;
}
i += j;
str = strndup(model, mod_len);
if (!str) {
LOGMEM;
goto error;
}
mod = ly_ctx_get_module(ctx, str, NULL);
free(str);
if (resolve_data(mod, name, name_len, data, &node_match)) {
/* no instance exists */
return NULL;
}
if (has_predicate) {
/* we have predicate, so the current results must be list or leaf-list */
j = resolve_predicate(&path[i], &node_match);
if (j < 1) {
LOGVAL(LYE_INPRED, LY_VLOG_LYD, data, &path[i-j]);
goto error;
}
i += j;
if (!node_match.count) {
/* no instance exists */
return NULL;
}
}
}
if (!node_match.count) {
/* no instance exists */
return NULL;
} else if (node_match.count > 1) {
/* instance identifier must resolve to a single node */
LOGVAL(LYE_TOOMANY, LY_VLOG_LYD, data, path, "data tree");
goto error;
} else {
/* we have required result, remember it and cleanup */
result = node_match.node[0];
free(node_match.node);
return result;
}
error:
/* cleanup */
free(node_match.node);
return NULL;
}
/**
* @brief Check all XPath expressions of a node (when and must), set LYS_XPATH_DEP flag if required.
*
* @param[in] node Node to examine.
* @return EXIT_SUCCESS on success, EXIT_FAILURE on forward reference, -1 on error.
*/
static int
check_node_xpath(struct lys_node *node)
{
struct lys_node *parent, *elem;
struct lyxp_set set;
uint32_t i;
int rc;
parent = node;
while (parent) {
if (parent->nodetype == LYS_GROUPING) {
/* unresolved grouping, skip for now (will be checked later) */
return EXIT_SUCCESS;
}
if (parent->nodetype == LYS_AUGMENT) {
if (!((struct lys_node_augment *)parent)->target) {
/* uresolved augment, skip for now (will be checked later) */
return EXIT_SUCCESS;
} else {
parent = ((struct lys_node_augment *)parent)->target;
continue;
}
}
parent = parent->parent;
}
rc = lyxp_node_atomize(node, &set);
if (rc) {
return rc;
}
for (parent = node; parent && !(parent->nodetype & (LYS_RPC | LYS_ACTION | LYS_NOTIF)); parent = lys_parent(parent));
for (i = 0; i < set.used; ++i) {
/* skip roots'n'stuff */
if (set.val.snodes[i].type == LYXP_NODE_ELEM) {
/* XPath expression cannot reference "lower" status than the node that has the definition */
if (lyp_check_status(node->flags, lys_node_module(node), node->name, set.val.snodes[i].snode->flags,
lys_node_module(set.val.snodes[i].snode), set.val.snodes[i].snode->name, node)) {
return -1;
}
if (parent) {
for (elem = set.val.snodes[i].snode; elem && (elem != parent); elem = lys_parent(elem));
if (!elem) {
/* not in node's RPC or notification subtree, set the flag */
node->flags |= LYS_VALID_DEP;
break;
}
}
}
}
free(set.val.snodes);
return EXIT_SUCCESS;
}
/**
* @brief Passes config flag down to children, skips nodes without config flags.
* Does not log.
*
* @param[in] node Siblings and their children to have flags changed.
* @param[in] clear Flag to clear all config flags if parent is LYS_NOTIF, LYS_INPUT, LYS_OUTPUT, LYS_RPC.
* @param[in] flags Flags to assign to all the nodes.
*
* @return 0 on success, -1 on error.
*/
static int
inherit_config_flag(struct lys_node *node, int flags, int clear, int check_list, int check_xpath)
{
assert(!(flags ^ (flags & LYS_CONFIG_MASK)));
LY_TREE_FOR(node, node) {
if (check_xpath && check_node_xpath(node)) {
return -1;
}
if (clear) {
node->flags &= ~LYS_CONFIG_MASK;
node->flags &= ~LYS_CONFIG_SET;
} else {
if (node->flags & LYS_CONFIG_SET) {
/* skip nodes with an explicit config value */
if ((flags & LYS_CONFIG_R) && (node->flags & LYS_CONFIG_W)) {
LOGVAL(LYE_INARG, LY_VLOG_LYS, node, "true", "config");
LOGVAL(LYE_SPEC, LY_VLOG_LYS, node, "State nodes cannot have configuration nodes as children.");
return -1;
}
continue;
}
if (!(node->nodetype & (LYS_USES | LYS_GROUPING))) {
node->flags = (node->flags & ~LYS_CONFIG_MASK) | flags;
/* check that configuration lists have keys */
if (check_list && (node->nodetype == LYS_LIST)
&& (node->flags & LYS_CONFIG_W) && !((struct lys_node_list *)node)->keys_size) {
LOGVAL(LYE_MISSCHILDSTMT, LY_VLOG_LYS, node, "key", "list");
return -1;
}
}
}
if (!(node->nodetype & (LYS_LEAF | LYS_LEAFLIST | LYS_ANYDATA))) {
if (inherit_config_flag(node->child, flags, clear, check_list, check_xpath)) {
return -1;
}
}
}
return 0;
}
/**
* @brief Resolve augment target. Logs directly.
*
* @param[in] aug Augment to use.
* @param[in] siblings Nodes where to start the search in. If set, uses augment, if not, standalone augment.
*
* @return EXIT_SUCCESS on success, EXIT_FAILURE on forward reference, -1 on error.
*/
static int
resolve_augment(struct lys_node_augment *aug, struct lys_node *siblings)
{
int rc, clear_config;
struct lys_node *sub;
const struct lys_node *aug_target, *parent;
struct lys_module *mod;
assert(aug && !aug->target);
/* resolve target node */
rc = resolve_augment_schema_nodeid(aug->target_name, siblings, (siblings ? NULL : aug->module), &aug_target);
if (rc == -1) {
return -1;
}
if (rc > 0) {
LOGVAL(LYE_INCHAR, LY_VLOG_LYS, aug, aug->target_name[rc - 1], &aug->target_name[rc - 1]);
return -1;
}
if (!aug_target) {
LOGVAL(LYE_INRESOLV, LY_VLOG_LYS, aug, "augment", aug->target_name);
return EXIT_FAILURE;
}
/* check that we want to connect augment into its target */
mod = lys_main_module(aug->module);
if (!mod->implemented) {
/* it must be augment only to the same module,
* otherwise we do not apply augment in not-implemented
* module. If the module is set to be implemented in future,
* the augment is being resolved and checked again */
for (sub = aug->target; sub; sub = lys_parent(sub)) {
if (lys_node_module(sub) != mod) {
/* this is not an implemented module and the augment
* target some other module, so avoid its connecting
* to the target */
return EXIT_SUCCESS;
}
}
}
if (!aug->child) {
/* nothing to do */
LOGWRN("Augment \"%s\" without children.", aug->target_name);
goto success;
}
/* check for mandatory nodes - if the target node is in another module
* the added nodes cannot be mandatory
*/
if (!aug->parent && (lys_node_module((struct lys_node *)aug) != lys_node_module(aug_target))
&& (rc = lyp_check_mandatory_augment(aug))) {
return rc;
}
/* check augment target type and then augment nodes type */
if (aug_target->nodetype & (LYS_CONTAINER | LYS_LIST | LYS_CASE | LYS_INPUT | LYS_OUTPUT | LYS_NOTIF)) {
LY_TREE_FOR(aug->child, sub) {
if (!(sub->nodetype & (LYS_ANYDATA | LYS_CONTAINER | LYS_LEAF | LYS_LIST | LYS_LEAFLIST | LYS_USES | LYS_CHOICE))) {
LOGVAL(LYE_INCHILDSTMT, LY_VLOG_LYS, aug, strnodetype(sub->nodetype), "augment");
LOGVAL(LYE_SPEC, LY_VLOG_LYS, aug, "Cannot augment \"%s\" with a \"%s\".",
strnodetype(aug_target->nodetype), strnodetype(sub->nodetype));
return -1;
}
}
} else if (aug_target->nodetype == LYS_CHOICE) {
LY_TREE_FOR(aug->child, sub) {
if (!(sub->nodetype & (LYS_CASE | LYS_ANYDATA | LYS_CONTAINER | LYS_LEAF | LYS_LIST | LYS_LEAFLIST))) {
LOGVAL(LYE_INCHILDSTMT, LY_VLOG_LYS, aug, strnodetype(sub->nodetype), "augment");
LOGVAL(LYE_SPEC, LY_VLOG_LYS, aug, "Cannot augment \"%s\" with a \"%s\".",
strnodetype(aug_target->nodetype), strnodetype(sub->nodetype));
return -1;
}
}
} else {
LOGVAL(LYE_INARG, LY_VLOG_LYS, aug, aug->target_name, "target-node");
LOGVAL(LYE_SPEC, LY_VLOG_LYS, aug, "Invalid augment target node type \"%s\".", strnodetype(aug_target->nodetype));
return -1;
}
/* check identifier uniqueness as in lys_node_addchild() */
LY_TREE_FOR(aug->child, sub) {
if (lys_check_id(sub, (struct lys_node *)aug_target, NULL)) {
return -1;
}
}
/* finally reconnect augmenting data into the target - add them to the target child list,
* by setting aug->target we know the augment is fully resolved now */
aug->target = (struct lys_node *)aug_target;
if (aug->target->child) {
sub = aug->target->child->prev; /* remember current target's last node */
sub->next = aug->child; /* connect augmenting data after target's last node */
aug->target->child->prev = aug->child->prev; /* new target's last node is last augmenting node */
aug->child->prev = sub; /* finish connecting of both child lists */
} else {
aug->target->child = aug->child;
}
/* inherit config information from actual parent */
for(parent = aug_target; parent && !(parent->nodetype & (LYS_NOTIF | LYS_INPUT | LYS_OUTPUT | LYS_RPC)); parent = lys_parent(parent));
clear_config = (parent) ? 1 : 0;
LY_TREE_FOR(aug->child, sub) {
if (inherit_config_flag(sub, aug_target->flags & LYS_CONFIG_MASK, clear_config, 1, 1)) {
return -1;
}
}
success:
if (mod->implemented) {
/* make target modules also implemented */
for (sub = aug->target; sub; sub = lys_parent(sub)) {
if (lys_set_implemented(sub->module)) {
return -1;
}
}
}
return EXIT_SUCCESS;
}
/**
* @brief Resolve (find) choice default case. Does not log.
*
* @param[in] choic Choice to use.
* @param[in] dflt Name of the default case.
*
* @return Pointer to the default node or NULL.
*/
static struct lys_node *
resolve_choice_dflt(struct lys_node_choice *choic, const char *dflt)
{
struct lys_node *child, *ret;
LY_TREE_FOR(choic->child, child) {
if (child->nodetype == LYS_USES) {
ret = resolve_choice_dflt((struct lys_node_choice *)child, dflt);
if (ret) {
return ret;
}
}
if (ly_strequal(child->name, dflt, 1) && (child->nodetype & (LYS_ANYDATA | LYS_CASE
| LYS_CONTAINER | LYS_LEAF | LYS_LEAFLIST | LYS_LIST | LYS_CHOICE))) {
return child;
}
}
return NULL;
}
/**
* @brief Resolve uses, apply augments, refines. Logs directly.
*
* @param[in] uses Uses to use.
* @param[in,out] unres List of unresolved items.
*
* @return EXIT_SUCCESS on success, -1 on error.
*/
static int
resolve_uses(struct lys_node_uses *uses, struct unres_schema *unres)
{
struct ly_ctx *ctx;
struct lys_node *node = NULL, *next, *iter, **refine_nodes = NULL;
struct lys_node *node_aux, *parent, *tmp;
struct lys_node_leaflist *llist;
struct lys_node_leaf *leaf;
struct lys_refine *rfn;
struct lys_restr *must, **old_must;
struct lys_iffeature *iff, **old_iff;
int i, j, k, rc, parent_config, clear_config, check_list, check_xpath;
uint8_t size, *old_size;
unsigned int usize, usize1, usize2;
assert(uses->grp);
/* HACK just check that the grouping is resolved */
assert(!uses->grp->nacm);
if (!uses->grp->child) {
/* grouping without children, warning was already displayed */
return EXIT_SUCCESS;
}
/* get proper parent (config) flags */
for (node_aux = lys_parent((struct lys_node *)uses); node_aux && (node_aux->nodetype == LYS_USES); node_aux = lys_parent(node_aux));
if (node_aux) {
parent_config = node_aux->flags & LYS_CONFIG_MASK;
} else {
/* default */
parent_config = LYS_CONFIG_W;
}
/* copy the data nodes from grouping into the uses context */
LY_TREE_FOR(uses->grp->child, node_aux) {
node = lys_node_dup(uses->module, (struct lys_node *)uses, node_aux, uses->nacm, unres, 0);
if (!node) {
LOGVAL(LYE_INARG, LY_VLOG_LYS, uses, uses->grp->name, "uses");
LOGVAL(LYE_SPEC, LY_VLOG_LYS, uses, "Copying data from grouping failed.");
goto fail;
}
/* test the name of siblings */
LY_TREE_FOR((uses->parent) ? uses->parent->child : lys_main_module(uses->module)->data, tmp) {
if (!(tmp->nodetype & (LYS_USES | LYS_GROUPING | LYS_CASE)) && ly_strequal(tmp->name, node_aux->name, 1)) {
goto fail;
}
}
}
ctx = uses->module->ctx;
parent = node;
while (parent && !(parent->nodetype & (LYS_NOTIF | LYS_INPUT | LYS_OUTPUT | LYS_RPC | LYS_GROUPING))) {
if (parent->nodetype == LYS_AUGMENT) {
if (!((struct lys_node_augment *)parent)->target) {
break;
} else {
parent = ((struct lys_node_augment *)parent)->target;
}
} else {
parent = parent->parent;
}
}
if (parent) {
if (parent->nodetype & (LYS_GROUPING | LYS_AUGMENT)) {
/* we are still in some other unresolved grouping or augment, unable to check lists */
check_list = 0;
clear_config = 0;
check_xpath = 0;
} else {
check_list = 0;
clear_config = 1;
check_xpath = 1;
}
} else {
check_list = 1;
clear_config = 0;
check_xpath = 1;
}
if (parent_config) {
assert(uses->child);
if (inherit_config_flag(uses->child, parent_config, clear_config, check_list, check_xpath)) {
goto fail;
}
}
/* we managed to copy the grouping, the rest must be possible to resolve */
if (uses->refine_size) {
refine_nodes = malloc(uses->refine_size * sizeof *refine_nodes);
if (!refine_nodes) {
LOGMEM;
goto fail;
}
}
/* apply refines */
for (i = 0; i < uses->refine_size; i++) {
rfn = &uses->refine[i];
rc = resolve_descendant_schema_nodeid(rfn->target_name, uses->child, LYS_NO_RPC_NOTIF_NODE,
1, 0, (const struct lys_node **)&node);
if (rc || !node) {
LOGVAL(LYE_INARG, LY_VLOG_LYS, uses, rfn->target_name, "refine");
goto fail;
}
if (rfn->target_type && !(node->nodetype & rfn->target_type)) {
LOGVAL(LYE_INARG, LY_VLOG_LYS, uses, rfn->target_name, "refine");
LOGVAL(LYE_SPEC, LY_VLOG_LYS, uses, "Refine substatements not applicable to the target-node.");
goto fail;
}
refine_nodes[i] = node;
/* description on any nodetype */
if (rfn->dsc) {
lydict_remove(ctx, node->dsc);
node->dsc = lydict_insert(ctx, rfn->dsc, 0);
}
/* reference on any nodetype */
if (rfn->ref) {
lydict_remove(ctx, node->ref);
node->ref = lydict_insert(ctx, rfn->ref, 0);
}
/* config on any nodetype */
if ((rfn->flags & LYS_CONFIG_MASK) && !clear_config) {
node->flags &= ~LYS_CONFIG_MASK;
node->flags |= (rfn->flags & LYS_CONFIG_MASK);
}
/* default value ... */
if (rfn->dflt_size) {
if (node->nodetype == LYS_LEAF) {
/* leaf */
leaf = (struct lys_node_leaf *)node;
lydict_remove(ctx, leaf->dflt);
leaf->dflt = lydict_insert(ctx, rfn->dflt[0], 0);
/* check the default value */
if (unres_schema_add_str(leaf->module, unres, &leaf->type, UNRES_TYPE_DFLT, leaf->dflt) == -1) {
goto fail;
}
} else if (node->nodetype == LYS_LEAFLIST) {
/* leaf-list */
llist = (struct lys_node_leaflist *)node;
/* remove complete set of defaults in target */
for (i = 0; i < llist->dflt_size; i++) {
lydict_remove(ctx, llist->dflt[i]);
}
free(llist->dflt);
/* copy the default set from refine */
llist->dflt_size = rfn->dflt_size;
llist->dflt = malloc(llist->dflt_size * sizeof *llist->dflt);
for (i = 0; i < llist->dflt_size; i++) {
llist->dflt[i] = lydict_insert(ctx, rfn->dflt[i], 0);
}
/* check default value */
for (i = 0; i < llist->dflt_size; i++) {
if (unres_schema_add_str(llist->module, unres, &llist->type, UNRES_TYPE_DFLT, llist->dflt[i]) == -1) {
goto fail;
}
}
}
}
/* mandatory on leaf, anyxml or choice */
if (rfn->flags & LYS_MAND_MASK) {
if (node->nodetype & (LYS_LEAF | LYS_ANYDATA | LYS_CHOICE)) {
/* remove current value */
node->flags &= ~LYS_MAND_MASK;
/* set new value */
node->flags |= (rfn->flags & LYS_MAND_MASK);
}
if (rfn->flags & LYS_MAND_TRUE) {
/* check if node has default value */
if ((node->nodetype & LYS_LEAF) && ((struct lys_node_leaf *)node)->dflt) {
LOGVAL(LYE_SPEC, LY_VLOG_NONE, NULL, "The \"mandatory\" statement is forbidden on leaf with \"default\".");
goto fail;
}
if ((node->nodetype & LYS_CHOICE) && ((struct lys_node_choice *)node)->dflt) {
LOGVAL(LYE_SPEC, LY_VLOG_NONE, NULL, "The \"mandatory\" statement is forbidden on choices with \"default\".");
goto fail;
}
}
}
/* presence on container */
if ((node->nodetype & LYS_CONTAINER) && rfn->mod.presence) {
lydict_remove(ctx, ((struct lys_node_container *)node)->presence);
((struct lys_node_container *)node)->presence = lydict_insert(ctx, rfn->mod.presence, 0);
}
/* min/max-elements on list or leaf-list */
if (node->nodetype == LYS_LIST) {
if (rfn->flags & LYS_RFN_MINSET) {
((struct lys_node_list *)node)->min = rfn->mod.list.min;
}
if (rfn->flags & LYS_RFN_MAXSET) {
((struct lys_node_list *)node)->max = rfn->mod.list.max;
}
} else if (node->nodetype == LYS_LEAFLIST) {
if (rfn->flags & LYS_RFN_MINSET) {
((struct lys_node_leaflist *)node)->min = rfn->mod.list.min;
}
if (rfn->flags & LYS_RFN_MAXSET) {
((struct lys_node_leaflist *)node)->max = rfn->mod.list.max;
}
}
/* must in leaf, leaf-list, list, container or anyxml */
if (rfn->must_size) {
switch (node->nodetype) {
case LYS_LEAF:
old_size = &((struct lys_node_leaf *)node)->must_size;
old_must = &((struct lys_node_leaf *)node)->must;
break;
case LYS_LEAFLIST:
old_size = &((struct lys_node_leaflist *)node)->must_size;
old_must = &((struct lys_node_leaflist *)node)->must;
break;
case LYS_LIST:
old_size = &((struct lys_node_list *)node)->must_size;
old_must = &((struct lys_node_list *)node)->must;
break;
case LYS_CONTAINER:
old_size = &((struct lys_node_container *)node)->must_size;
old_must = &((struct lys_node_container *)node)->must;
break;
case LYS_ANYXML:
case LYS_ANYDATA:
old_size = &((struct lys_node_anydata *)node)->must_size;
old_must = &((struct lys_node_anydata *)node)->must;
break;
default:
LOGINT;
goto fail;
}
size = *old_size + rfn->must_size;
must = realloc(*old_must, size * sizeof *rfn->must);
if (!must) {
LOGMEM;
goto fail;
}
for (k = 0, j = *old_size; k < rfn->must_size; k++, j++) {
must[j].expr = lydict_insert(ctx, rfn->must[k].expr, 0);
must[j].dsc = lydict_insert(ctx, rfn->must[k].dsc, 0);
must[j].ref = lydict_insert(ctx, rfn->must[k].ref, 0);
must[j].eapptag = lydict_insert(ctx, rfn->must[k].eapptag, 0);
must[j].emsg = lydict_insert(ctx, rfn->must[k].emsg, 0);
}
*old_must = must;
*old_size = size;
/* check XPath dependencies again */
if (unres_schema_add_node(node->module, unres, node, UNRES_XPATH, NULL) == -1) {
goto fail;
}
}
/* if-feature in leaf, leaf-list, list, container or anyxml */
if (rfn->iffeature_size) {
old_size = &node->iffeature_size;
old_iff = &node->iffeature;
size = *old_size + rfn->iffeature_size;
iff = realloc(*old_iff, size * sizeof *rfn->iffeature);
if (!iff) {
LOGMEM;
goto fail;
}
for (k = 0, j = *old_size; k < rfn->iffeature_size; k++, j++) {
resolve_iffeature_getsizes(&rfn->iffeature[k], &usize1, &usize2);
if (usize1) {
/* there is something to duplicate */
/* duplicate compiled expression */
usize = (usize1 / 4) + (usize1 % 4) ? 1 : 0;
iff[j].expr = malloc(usize * sizeof *iff[j].expr);
memcpy(iff[j].expr, rfn->iffeature[k].expr, usize * sizeof *iff[j].expr);
/* duplicate list of feature pointers */
iff[j].features = malloc(usize2 * sizeof *iff[k].features);
memcpy(iff[j].features, rfn->iffeature[k].features, usize2 * sizeof *iff[j].features);
}
}
*old_iff = iff;
*old_size = size;
}
}
/* apply augments */
for (i = 0; i < uses->augment_size; i++) {
rc = resolve_augment(&uses->augment[i], uses->child);
if (rc) {
goto fail;
}
}
/* check refines */
for (i = 0; i < uses->refine_size; i++) {
node = refine_nodes[i];
rfn = &uses->refine[i];
/* config on any nodetype */
if ((rfn->flags & LYS_CONFIG_MASK) && !clear_config) {
for (parent = lys_parent(node); parent && parent->nodetype == LYS_USES; parent = lys_parent(parent));
if (parent && parent->nodetype != LYS_GROUPING &&
((parent->flags & LYS_CONFIG_MASK) != (rfn->flags & LYS_CONFIG_MASK)) &&
(rfn->flags & LYS_CONFIG_W)) {
/* setting config true under config false is prohibited */
LOGVAL(LYE_INARG, LY_VLOG_LYS, uses, "config", "refine");
LOGVAL(LYE_SPEC, LY_VLOG_LYS, uses,
"changing config from 'false' to 'true' is prohibited while "
"the target's parent is still config 'false'.");
goto fail;
}
/* inherit config change to the target children */
LY_TREE_DFS_BEGIN(node->child, next, iter) {
if (rfn->flags & LYS_CONFIG_W) {
if (iter->flags & LYS_CONFIG_SET) {
/* config is set explicitely, go to next sibling */
next = NULL;
goto nextsibling;
}
} else { /* LYS_CONFIG_R */
if ((iter->flags & LYS_CONFIG_SET) && (iter->flags & LYS_CONFIG_W)) {
/* error - we would have config data under status data */
LOGVAL(LYE_INARG, LY_VLOG_LYS, uses, "config", "refine");
LOGVAL(LYE_SPEC, LY_VLOG_LYS, uses,
"changing config from 'true' to 'false' is prohibited while the target "
"has still a children with explicit config 'true'.");
goto fail;
}
}
/* change config */
iter->flags &= ~LYS_CONFIG_MASK;
iter->flags |= (rfn->flags & LYS_CONFIG_MASK);
/* select next iter - modified LY_TREE_DFS_END */
if (iter->nodetype & (LYS_LEAF | LYS_LEAFLIST | LYS_ANYDATA)) {
next = NULL;
} else {
next = iter->child;
}
nextsibling:
if (!next) {
/* try siblings */
next = iter->next;
}
while (!next) {
/* parent is already processed, go to its sibling */
iter = lys_parent(iter);
/* no siblings, go back through parents */
if (iter == node) {
/* we are done, no next element to process */
break;
}
next = iter->next;
}
}
}
/* default value */
if (rfn->dflt_size && node->nodetype == LYS_CHOICE) {
/* choice */
((struct lys_node_choice *)node)->dflt = resolve_choice_dflt((struct lys_node_choice *)node,
rfn->dflt[0]);
if (!((struct lys_node_choice *)node)->dflt) {
LOGVAL(LYE_INARG, LY_VLOG_LYS, uses, rfn->dflt[0], "default");
goto fail;
}
if (lyp_check_mandatory_choice(node)) {
goto fail;
}
}
/* min/max-elements on list or leaf-list */
if (node->nodetype == LYS_LIST) {
if (((struct lys_node_list *)node)->min > ((struct lys_node_list *)node)->max) {
LOGVAL(LYE_SPEC, LY_VLOG_NONE, NULL, "Invalid value \"%d\" of \"%s\".", rfn->mod.list.min, "min-elements");
LOGVAL(LYE_SPEC, LY_VLOG_NONE, NULL, "\"min-elements\" is bigger than \"max-elements\".");
goto fail;
}
} else if (node->nodetype == LYS_LEAFLIST) {
if (((struct lys_node_leaflist *)node)->min > ((struct lys_node_leaflist *)node)->max) {
LOGVAL(LYE_SPEC, LY_VLOG_NONE, NULL, "Invalid value \"%d\" of \"%s\".", rfn->mod.list.min, "min-elements");
LOGVAL(LYE_SPEC, LY_VLOG_NONE, NULL, "\"min-elements\" is bigger than \"max-elements\".");
goto fail;
}
}
/* additional checks */
if (node->nodetype == LYS_LEAFLIST) {
llist = (struct lys_node_leaflist *)node;
if (llist->dflt_size && llist->min) {
LOGVAL(LYE_INCHILDSTMT, LY_VLOG_NONE, NULL, rfn->dflt_size ? "default" : "min-elements", "refine");
LOGVAL(LYE_SPEC, LY_VLOG_NONE, NULL,
"The \"min-elements\" statement with non-zero value is forbidden on leaf-lists with the \"default\" statement.");
goto fail;
}
}
if ((rfn->flags & LYS_MAND_TRUE) || rfn->mod.list.min) {
/* check for mandatory node in default case, first find the closest parent choice to the changed node */
for (parent = node->parent;
parent && !(parent->nodetype & (LYS_CHOICE | LYS_GROUPING | LYS_ACTION | LYS_USES));
parent = parent->parent) {
if (parent->nodetype == LYS_CONTAINER && ((struct lys_node_container *)parent)->presence) {
/* stop also on presence containers */
break;
}
}
/* and if it is a choice with the default case, check it for presence of a mandatory node in it */
if (parent && parent->nodetype == LYS_CHOICE && ((struct lys_node_choice *)parent)->dflt) {
if (lyp_check_mandatory_choice(parent)) {
goto fail;
}
}
}
}
free(refine_nodes);
return EXIT_SUCCESS;
fail:
LY_TREE_FOR_SAFE(uses->child, next, iter) {
lys_node_free(iter, NULL, 0);
}
free(refine_nodes);
return -1;
}
static int
identity_backlink_update(struct lys_ident *der, struct lys_ident *base)
{
int i;
assert(der && base);
base->der = ly_realloc(base->der, (base->der_size + 1) * sizeof *(base->der));
if (!base->der) {
LOGMEM;
return EXIT_FAILURE;
}
base->der[base->der_size++] = der;
for (i = 0; i < base->base_size; i++) {
if (identity_backlink_update(der, base->base[i])) {
return EXIT_FAILURE;
}
}
return EXIT_SUCCESS;
}
/**
* @brief Resolve base identity recursively. Does not log.
*
* @param[in] module Main module.
* @param[in] ident Identity to use.
* @param[in] basename Base name of the identity.
* @param[out] ret Pointer to the resolved identity. Can be NULL.
*
* @return EXIT_SUCCESS on success, EXIT_FAILURE on forward reference, -1 on crucial error.
*/
static int
resolve_base_ident_sub(const struct lys_module *module, struct lys_ident *ident, const char *basename,
struct unres_schema *unres, struct lys_ident **ret)
{
uint32_t i, j;
struct lys_ident *base = NULL;
assert(ret);
/* search module */
for (i = 0; i < module->ident_size; i++) {
if (!strcmp(basename, module->ident[i].name)) {
if (!ident) {
/* just search for type, so do not modify anything, just return
* the base identity pointer */
*ret = &module->ident[i];
return EXIT_SUCCESS;
}
base = &module->ident[i];
goto matchfound;
}
}
/* search submodules */
for (j = 0; j < module->inc_size && module->inc[j].submodule; j++) {
for (i = 0; i < module->inc[j].submodule->ident_size; i++) {
if (!strcmp(basename, module->inc[j].submodule->ident[i].name)) {
if (!ident) {
*ret = &module->inc[j].submodule->ident[i];
return EXIT_SUCCESS;
}
base = &module->inc[j].submodule->ident[i];
goto matchfound;
}
}
}
matchfound:
/* we found it somewhere */
if (base) {
/* is it already completely resolved? */
for (i = 0; i < unres->count; i++) {
if ((unres->item[i] == base) && (unres->type[i] == UNRES_IDENT)) {
/* identity found, but not yet resolved, so do not return it in *res and try it again later */
/* simple check for circular reference,
* the complete check is done as a side effect of using only completely
* resolved identities (previous check of unres content) */
if (ly_strequal((const char *)unres->str_snode[i], ident->name, 1)) {
LOGVAL(LYE_INARG, LY_VLOG_NONE, NULL, basename, "base");
LOGVAL(LYE_SPEC, LY_VLOG_NONE, NULL, "Circular reference of \"%s\" identity.", basename);
return -1;
}
return EXIT_FAILURE;
}
}
/* checks done, store the result */
*ret = base;
return EXIT_SUCCESS;
}
/* base not found (maybe a forward reference) */
return EXIT_FAILURE;
}
/**
* @brief Resolve base identity. Logs directly.
*
* @param[in] module Main module.
* @param[in] ident Identity to use.
* @param[in] basename Base name of the identity.
* @param[in] parent Either "type" or "identity".
* @param[in,out] type Type structure where we want to resolve identity. Can be NULL.
*
* @return EXIT_SUCCESS on success, EXIT_FAILURE on forward reference, -1 on error.
*/
static int
resolve_base_ident(const struct lys_module *module, struct lys_ident *ident, const char *basename, const char *parent,
struct lys_type *type, struct unres_schema *unres)
{
const char *name;
int mod_name_len = 0, rc;
struct lys_ident *target, **ret;
uint16_t flags;
struct lys_module *mod;
assert((ident && !type) || (!ident && type));
if (!type) {
/* have ident to resolve */
ret = &target;
flags = ident->flags;
mod = ident->module;
} else {
/* have type to fill */
++type->info.ident.count;
type->info.ident.ref = ly_realloc(type->info.ident.ref, type->info.ident.count * sizeof *type->info.ident.ref);
if (!type->info.ident.ref) {
LOGMEM;
return -1;
}
ret = &type->info.ident.ref[type->info.ident.count - 1];
flags = type->parent->flags;
mod = type->parent->module;
}
*ret = NULL;
/* search for the base identity */
name = strchr(basename, ':');
if (name) {
/* set name to correct position after colon */
mod_name_len = name - basename;
name++;
if (!strncmp(basename, module->name, mod_name_len) && !module->name[mod_name_len]) {
/* prefix refers to the current module, ignore it */
mod_name_len = 0;
}
} else {
name = basename;
}
/* get module where to search */
module = lys_get_import_module(module, NULL, 0, mod_name_len ? basename : NULL, mod_name_len);
if (!module) {
/* identity refers unknown data model */
LOGVAL(LYE_INMOD, LY_VLOG_NONE, NULL, basename);
return -1;
}
/* search in the identified module ... */
rc = resolve_base_ident_sub(module, ident, name, unres, ret);
if (!rc) {
assert(*ret);
/* check status */
if (lyp_check_status(flags, mod, ident ? ident->name : "of type",
(*ret)->flags, (*ret)->module, (*ret)->name, NULL)) {
rc = -1;
} else {
if (ident) {
ident->base[ident->base_size++] = *ret;
/* maintain backlinks to the derived identities */
rc = identity_backlink_update(ident, *ret) ? -1 : EXIT_SUCCESS;
}
}
} else if (rc == EXIT_FAILURE) {
LOGVAL(LYE_INRESOLV, LY_VLOG_NONE, NULL, parent, basename);
if (type) {
--type->info.ident.count;
}
}
return rc;
}
/**
* @brief Resolve JSON data format identityref. Logs directly.
*
* @param[in] type Identityref type.
* @param[in] ident_name Identityref name.
* @param[in] node Node where the identityref is being resolved
*
* @return Pointer to the identity resolvent, NULL on error.
*/
struct lys_ident *
resolve_identref(struct lys_type *type, const char *ident_name, struct lyd_node *node)
{
const char *mod_name, *name;
int mod_name_len, rc, i, j;
struct lys_ident *der, *cur;
if (!type || (!type->info.ident.count && !type->der) || !ident_name) {
return NULL;
}
rc = parse_node_identifier(ident_name, &mod_name, &mod_name_len, &name, NULL);
if (rc < 1) {
LOGVAL(LYE_INCHAR, LY_VLOG_LYD, node, ident_name[-rc], &ident_name[-rc]);
return NULL;
} else if (rc < (signed)strlen(ident_name)) {
LOGVAL(LYE_INCHAR, LY_VLOG_LYD, node, ident_name[rc], &ident_name[rc]);
return NULL;
}
/* go through all the bases in all the derived types */
while (type->der) {
for (i = 0; i < type->info.ident.count; ++i) {
cur = type->info.ident.ref[i];
if (!strcmp(cur->name, name) && (!mod_name
|| (!strncmp(cur->module->name, mod_name, mod_name_len) && !cur->module->name[mod_name_len]))) {
goto match;
}
for (j = 0; j < cur->der_size; j++) {
der = cur->der[j]; /* shortcut */
if (!strcmp(der->name, name) &&
(!mod_name || (!strncmp(der->module->name, mod_name, mod_name_len) && !der->module->name[mod_name_len]))) {
/* we have match */
cur = der;
goto match;
}
}
}
type = &type->der->type;
}
LOGVAL(LYE_INRESOLV, LY_VLOG_LYD, node, "identityref", ident_name);
return NULL;
match:
for (i = 0; i < cur->iffeature_size; i++) {
if (!resolve_iffeature(&cur->iffeature[i])) {
LOGVAL(LYE_INVAL, LY_VLOG_LYD, node, cur->name, node->schema->name);
LOGVAL(LYE_SPEC, LY_VLOG_LYD, node, "Identity \"%s\" is disabled by its if-feature condition.",
cur->name);
return NULL;
}
}
return cur;
}
/**
* @brief Resolve unresolved uses. Logs directly.
*
* @param[in] uses Uses to use.
* @param[in] unres Specific unres item.
*
* @return EXIT_SUCCESS on success, EXIT_FAILURE on forward reference, -1 on error.
*/
static int
resolve_unres_schema_uses(struct lys_node_uses *uses, struct unres_schema *unres)
{
int rc;
struct lys_node *par_grp;
/* HACK: when a grouping has uses inside, all such uses have to be resolved before the grouping itself
* is used in some uses. When we see such a uses, the grouping's nacm member (not used in grouping)
* is used to store number of so far unresolved uses. The grouping cannot be used unless the nacm
* value is decreased back to 0. To remember that the uses already increased grouping's nacm, the
* LYS_USESGRP flag is used. */
for (par_grp = lys_parent((struct lys_node *)uses); par_grp && (par_grp->nodetype != LYS_GROUPING); par_grp = lys_parent(par_grp));
if (!uses->grp) {
rc = resolve_uses_schema_nodeid(uses->name, (const struct lys_node *)uses, (const struct lys_node_grp **)&uses->grp);
if (rc == -1) {
LOGVAL(LYE_INRESOLV, LY_VLOG_LYS, uses, "uses", uses->name);
return -1;
} else if (rc > 0) {
LOGVAL(LYE_INCHAR, LY_VLOG_LYS, uses, uses->name[rc - 1], &uses->name[rc - 1]);
return -1;
} else if (!uses->grp) {
if (par_grp && !(uses->flags & LYS_USESGRP)) {
/* hack - in contrast to lys_node, lys_node_grp has bigger nacm field
* (and smaller flags - it uses only a limited set of flags)
*/
((struct lys_node_grp *)par_grp)->nacm++;
uses->flags |= LYS_USESGRP;
}
LOGVAL(LYE_INRESOLV, LY_VLOG_LYS, uses, "uses", uses->name);
return EXIT_FAILURE;
}
}
if (uses->grp->nacm) {
if (par_grp && !(uses->flags & LYS_USESGRP)) {
((struct lys_node_grp *)par_grp)->nacm++;
uses->flags |= LYS_USESGRP;
} else {
/* instantiate grouping only when it is completely resolved */
uses->grp = NULL;
}
LOGVAL(LYE_INRESOLV, LY_VLOG_LYS, uses, "uses", uses->name);
return EXIT_FAILURE;
}
rc = resolve_uses(uses, unres);
if (!rc) {
/* decrease unres count only if not first try */
if (par_grp && (uses->flags & LYS_USESGRP)) {
if (!((struct lys_node_grp *)par_grp)->nacm) {
LOGINT;
return -1;
}
((struct lys_node_grp *)par_grp)->nacm--;
uses->flags &= ~LYS_USESGRP;
}
/* check status */
if (lyp_check_status(uses->flags, uses->module, "of uses",
uses->grp->flags, uses->grp->module, uses->grp->name,
(struct lys_node *)uses)) {
return -1;
}
return EXIT_SUCCESS;
}
return rc;
}
/**
* @brief Resolve list keys. Logs directly.
*
* @param[in] list List to use.
* @param[in] keys_str Keys node value.
*
* @return EXIT_SUCCESS on success, EXIT_FAILURE on forward reference, -1 on error.
*/
static int
resolve_list_keys(struct lys_node_list *list, const char *keys_str)
{
int i, len, rc;
const char *value;
for (i = 0; i < list->keys_size; ++i) {
/* get the key name */
if ((value = strpbrk(keys_str, " \t\n"))) {
len = value - keys_str;
while (isspace(value[0])) {
value++;
}
} else {
len = strlen(keys_str);
}
rc = lys_get_sibling(list->child, lys_main_module(list->module)->name, 0, keys_str, len, LYS_LEAF, (const struct lys_node **)&list->keys[i]);
if (rc) {
LOGVAL(LYE_INRESOLV, LY_VLOG_LYS, list, "list keys", keys_str);
return EXIT_FAILURE;
}
if (check_key(list, i, keys_str, len)) {
/* check_key logs */
return -1;
}
/* check status */
if (lyp_check_status(list->flags, list->module, list->name,
list->keys[i]->flags, list->keys[i]->module, list->keys[i]->name,
(struct lys_node *)list->keys[i])) {
return -1;
}
/* prepare for next iteration */
while (value && isspace(value[0])) {
value++;
}
keys_str = value;
}
return EXIT_SUCCESS;
}
/**
* @brief Resolve (check) all must conditions of \p node.
* Logs directly.
*
* @param[in] node Data node with optional must statements.
* @param[in] inout_parent If set, must in input or output parent of node->schema will be resolved.
*
* @return EXIT_SUCCESS on pass, EXIT_FAILURE on fail, -1 on error.
*/
static int
resolve_must(struct lyd_node *node, int inout_parent)
{
uint8_t i, must_size;
struct lys_node *schema;
struct lys_restr *must;
struct lyxp_set set;
assert(node);
memset(&set, 0, sizeof set);
if (inout_parent) {
for (schema = lys_parent(node->schema);
schema && (schema->nodetype & (LYS_CHOICE | LYS_CASE | LYS_USES));
schema = lys_parent(schema));
if (!schema || !(schema->nodetype & (LYS_INPUT | LYS_OUTPUT))) {
LOGINT;
return -1;
}
must_size = ((struct lys_node_inout *)schema)->must_size;
must = ((struct lys_node_inout *)schema)->must;
/* context node is the RPC/action */
node = node->parent;
if (!(node->schema->nodetype & (LYS_RPC | LYS_ACTION))) {
LOGINT;
return -1;
}
} else {
switch (node->schema->nodetype) {
case LYS_CONTAINER:
must_size = ((struct lys_node_container *)node->schema)->must_size;
must = ((struct lys_node_container *)node->schema)->must;
break;
case LYS_LEAF:
must_size = ((struct lys_node_leaf *)node->schema)->must_size;
must = ((struct lys_node_leaf *)node->schema)->must;
break;
case LYS_LEAFLIST:
must_size = ((struct lys_node_leaflist *)node->schema)->must_size;
must = ((struct lys_node_leaflist *)node->schema)->must;
break;
case LYS_LIST:
must_size = ((struct lys_node_list *)node->schema)->must_size;
must = ((struct lys_node_list *)node->schema)->must;
break;
case LYS_ANYXML:
case LYS_ANYDATA:
must_size = ((struct lys_node_anydata *)node->schema)->must_size;
must = ((struct lys_node_anydata *)node->schema)->must;
break;
case LYS_NOTIF:
must_size = ((struct lys_node_notif *)node->schema)->must_size;
must = ((struct lys_node_notif *)node->schema)->must;
break;
default:
must_size = 0;
break;
}
}
for (i = 0; i < must_size; ++i) {
if (lyxp_eval(must[i].expr, node, LYXP_NODE_ELEM, &set, LYXP_MUST)) {
return -1;
}
lyxp_set_cast(&set, LYXP_SET_BOOLEAN, node, LYXP_MUST);
if (!set.val.bool) {
LOGVAL(LYE_NOMUST, LY_VLOG_LYD, node, must[i].expr);
if (must[i].emsg) {
LOGVAL(LYE_SPEC, LY_VLOG_LYD, node, must[i].emsg);
}
if (must[i].eapptag) {
strncpy(((struct ly_err *)&ly_errno)->apptag, must[i].eapptag, LY_APPTAG_LEN - 1);
}
return 1;
}
}
return EXIT_SUCCESS;
}
/**
* @brief Resolve (find) when condition schema context node. Does not log.
*
* @param[in] schema Schema node with the when condition.
* @param[out] ctx_snode When schema context node.
* @param[out] ctx_snode_type Schema context node type.
*/
void
resolve_when_ctx_snode(const struct lys_node *schema, struct lys_node **ctx_snode, enum lyxp_node_type *ctx_snode_type)
{
const struct lys_node *sparent;
/* find a not schema-only node */
*ctx_snode_type = LYXP_NODE_ELEM;
while (schema->nodetype & (LYS_USES | LYS_CHOICE | LYS_CASE | LYS_AUGMENT | LYS_INPUT | LYS_OUTPUT)) {
if (schema->nodetype == LYS_AUGMENT) {
sparent = ((struct lys_node_augment *)schema)->target;
} else {
sparent = schema->parent;
}
if (!sparent) {
/* context node is the document root (fake root in our case) */
if (schema->flags & LYS_CONFIG_W) {
*ctx_snode_type = LYXP_NODE_ROOT_CONFIG;
} else {
*ctx_snode_type = LYXP_NODE_ROOT;
}
/* we need the first top-level sibling, but no uses or groupings */
schema = lys_getnext(NULL, NULL, lys_node_module(schema), 0);
break;
}
schema = sparent;
}
*ctx_snode = (struct lys_node *)schema;
}
/**
* @brief Resolve (find) when condition context node. Does not log.
*
* @param[in] node Data node, whose conditional definition is being decided.
* @param[in] schema Schema node with the when condition.
* @param[out] ctx_node Context node.
* @param[out] ctx_node_type Context node type.
*
* @return EXIT_SUCCESS on success, -1 on error.
*/
static int
resolve_when_ctx_node(struct lyd_node *node, struct lys_node *schema, struct lyd_node **ctx_node,
enum lyxp_node_type *ctx_node_type)
{
struct lyd_node *parent;
struct lys_node *sparent;
enum lyxp_node_type node_type;
uint16_t i, data_depth, schema_depth;
resolve_when_ctx_snode(schema, &schema, &node_type);
if (node_type == LYXP_NODE_ELEM) {
/* standard element context node */
for (parent = node, data_depth = 0; parent; parent = parent->parent, ++data_depth);
for (sparent = schema, schema_depth = 0;
sparent;
sparent = (sparent->nodetype == LYS_AUGMENT ? ((struct lys_node_augment *)sparent)->target : sparent->parent)) {
if (sparent->nodetype & (LYS_CONTAINER | LYS_LEAF | LYS_LEAFLIST | LYS_LIST | LYS_ANYDATA | LYS_NOTIF | LYS_RPC)) {
++schema_depth;
}
}
if (data_depth < schema_depth) {
return -1;
}
/* find the corresponding data node */
for (i = 0; i < data_depth - schema_depth; ++i) {
node = node->parent;
}
if (node->schema != schema) {
return -1;
}
} else {
/* root context node */
while (node->parent) {
node = node->parent;
}
while (node->prev->next) {
node = node->prev;
}
}
*ctx_node = node;
*ctx_node_type = node_type;
return EXIT_SUCCESS;
}
/**
* @brief Temporarily unlink nodes as per YANG 1.1 RFC section 7.21.5 for when XPath evaluation.
* The context nodes is adjusted if needed.
*
* @param[in] snode Schema node, whose children instances need to be unlinked.
* @param[in,out] node Data siblings where to look for the children of \p snode. If it is unlinked,
* it is moved to point to another sibling still in the original tree.
* @param[in,out] ctx_node When context node, adjusted if needed.
* @param[in] ctx_node_type Context node type, just for information to detect invalid situations.
* @param[out] unlinked_nodes Unlinked siblings. Can be safely appended to \p node afterwards.
* Ordering may change, but there will be no semantic change.
*
* @return EXIT_SUCCESS on success, -1 on error.
*/
static int
resolve_when_unlink_nodes(struct lys_node *snode, struct lyd_node **node, struct lyd_node **ctx_node,
enum lyxp_node_type ctx_node_type, struct lyd_node **unlinked_nodes)
{
struct lyd_node *next, *elem;
switch (snode->nodetype) {
case LYS_AUGMENT:
case LYS_USES:
case LYS_CHOICE:
case LYS_CASE:
LY_TREE_FOR(snode->child, snode) {
if (resolve_when_unlink_nodes(snode, node, ctx_node, ctx_node_type, unlinked_nodes)) {
return -1;
}
}
break;
case LYS_CONTAINER:
case LYS_LIST:
case LYS_LEAF:
case LYS_LEAFLIST:
case LYS_ANYXML:
case LYS_ANYDATA:
LY_TREE_FOR_SAFE(lyd_first_sibling(*node), next, elem) {
if (elem->schema == snode) {
if (elem == *ctx_node) {
/* We are going to unlink our context node! This normally cannot happen,
* but we use normal top-level data nodes for faking a document root node,
* so if this is the context node, we just use the next top-level node.
* Additionally, it can even happen that there are no top-level data nodes left,
* all were unlinked, so in this case we pass NULL as the context node/data tree,
* lyxp_eval() can handle this special situation.
*/
if (ctx_node_type == LYXP_NODE_ELEM) {
LOGINT;
return -1;
}
if (elem->prev == elem) {
/* unlinking last top-level element, use an empty data tree */
*ctx_node = NULL;
} else {
/* in this case just use the previous/last top-level data node */
*ctx_node = elem->prev;
}
} else if (elem == *node) {
/* We are going to unlink the currently processed node. This does not matter that
* much, but we would lose access to the original data tree, so just move our
* pointer somewhere still inside it.
*/
if ((*node)->prev != *node) {
*node = (*node)->prev;
} else {
/* the processed node with sibings were all unlinked, oh well */
*node = NULL;
}
}
/* temporarily unlink the node */
lyd_unlink(elem);
if (*unlinked_nodes) {
if (lyd_insert_after(*unlinked_nodes, elem)) {
LOGINT;
return -1;
}
} else {
*unlinked_nodes = elem;
}
if (snode->nodetype & (LYS_CONTAINER | LYS_LEAF | LYS_ANYDATA)) {
/* there can be only one instance */
break;
}
}
}
break;
default:
LOGINT;
return -1;
}
return EXIT_SUCCESS;
}
/**
* @brief Relink the unlinked nodes back.
*
* @param[in] node Data node to link the nodes back to. It can actually be the adjusted context node,
* we simply need a sibling from the original data tree.
* @param[in] unlinked_nodes Unlinked nodes to relink to \p node.
* @param[in] ctx_node_type Context node type to distinguish between \p node being the parent
* or the sibling of \p unlinked_nodes.
*
* @return EXIT_SUCCESS on success, -1 on error.
*/
static int
resolve_when_relink_nodes(struct lyd_node *node, struct lyd_node *unlinked_nodes, enum lyxp_node_type ctx_node_type)
{
struct lyd_node *elem;
LY_TREE_FOR_SAFE(unlinked_nodes, unlinked_nodes, elem) {
if (ctx_node_type == LYXP_NODE_ELEM) {
if (lyd_insert(node, elem)) {
return -1;
}
} else {
if (lyd_insert_after(node, elem)) {
return -1;
}
}
}
return EXIT_SUCCESS;
}
int
resolve_applies_must(const struct lyd_node *node)
{
int ret = 0;
uint8_t must_size;
struct lys_node *schema, *iter;
assert(node);
schema = node->schema;
/* their own must */
switch (schema->nodetype) {
case LYS_CONTAINER:
must_size = ((struct lys_node_container *)schema)->must_size;
break;
case LYS_LEAF:
must_size = ((struct lys_node_leaf *)schema)->must_size;
break;
case LYS_LEAFLIST:
must_size = ((struct lys_node_leaflist *)schema)->must_size;
break;
case LYS_LIST:
must_size = ((struct lys_node_list *)schema)->must_size;
break;
case LYS_ANYXML:
case LYS_ANYDATA:
must_size = ((struct lys_node_anydata *)schema)->must_size;
break;
case LYS_NOTIF:
must_size = ((struct lys_node_notif *)schema)->must_size;
break;
default:
must_size = 0;
break;
}
if (must_size) {
++ret;
}
/* schema may be a direct data child of input/output with must (but it must be first, it needs to be evaluated only once) */
if (!node->prev->next) {
for (iter = lys_parent(schema); iter && (iter->nodetype & (LYS_CHOICE | LYS_CASE | LYS_USES)); iter = lys_parent(iter));
if (iter && (iter->nodetype & (LYS_INPUT | LYS_OUTPUT))) {
ret += 0x2;
}
}
return ret;
}
int
resolve_applies_when(const struct lys_node *schema, int mode, const struct lys_node *stop)
{
const struct lys_node *parent;
assert(schema);
if (!(schema->nodetype & (LYS_NOTIF | LYS_RPC)) && (((struct lys_node_container *)schema)->when)) {
return 1;
}
parent = schema;
goto check_augment;
while (parent) {
/* stop conditions */
if (!mode) {
/* stop on node that can be instantiated in data tree */
if (!(parent->nodetype & (LYS_USES | LYS_CHOICE | LYS_CASE))) {
break;
}
} else {
/* stop on the specified node */
if (parent == stop) {
break;
}
}
if (((const struct lys_node_uses *)parent)->when) {
return 1;
}
check_augment:
if ((parent->parent && (parent->parent->nodetype == LYS_AUGMENT) &&
(((const struct lys_node_augment *)parent->parent)->when))) {
return 1;
}
parent = lys_parent(parent);
}
return 0;
}
/**
* @brief Resolve (check) all when conditions relevant for \p node.
* Logs directly.
*
* @param[in] node Data node, whose conditional reference, if such, is being decided.
*
* @return
* -1 - error, ly_errno is set
* 0 - true "when" statement
* 0, ly_vecode = LYVE_NOWHEN - false "when" statement
* 1, ly_vecode = LYVE_INWHEN - nodes needed to resolve are conditional and not yet resolved (under another "when")
*/
int
resolve_when(struct lyd_node *node, int *result)
{
struct lyd_node *ctx_node = NULL, *unlinked_nodes, *tmp_node;
struct lys_node *sparent;
struct lyxp_set set;
enum lyxp_node_type ctx_node_type;
int rc = 0;
assert(node);
memset(&set, 0, sizeof set);
if (!(node->schema->nodetype & (LYS_NOTIF | LYS_RPC)) && (((struct lys_node_container *)node->schema)->when)) {
/* make the node dummy for the evaluation */
node->validity |= LYD_VAL_INUSE;
rc = lyxp_eval(((struct lys_node_container *)node->schema)->when->cond, node, LYXP_NODE_ELEM, &set, LYXP_WHEN);
node->validity &= ~LYD_VAL_INUSE;
if (rc) {
if (rc == 1) {
LOGVAL(LYE_INWHEN, LY_VLOG_LYD, node, ((struct lys_node_container *)node->schema)->when->cond);
}
goto cleanup;
}
/* set boolean result of the condition */
lyxp_set_cast(&set, LYXP_SET_BOOLEAN, node, LYXP_WHEN);
if (!set.val.bool) {
LOGVAL(LYE_NOWHEN, LY_VLOG_LYD, node, ((struct lys_node_container *)node->schema)->when->cond);
node->when_status |= LYD_WHEN_FALSE;
goto cleanup;
}
/* free xpath set content */
lyxp_set_cast(&set, LYXP_SET_EMPTY, node, 0);
}
sparent = node->schema;
goto check_augment;
/* check when in every schema node that affects node */
while (sparent && (sparent->nodetype & (LYS_USES | LYS_CHOICE | LYS_CASE))) {
if (((struct lys_node_uses *)sparent)->when) {
if (!ctx_node) {
rc = resolve_when_ctx_node(node, sparent, &ctx_node, &ctx_node_type);
if (rc) {
LOGINT;
goto cleanup;
}
}
unlinked_nodes = NULL;
/* we do not want our node pointer to change */
tmp_node = node;
rc = resolve_when_unlink_nodes(sparent, &tmp_node, &ctx_node, ctx_node_type, &unlinked_nodes);
if (rc) {
goto cleanup;
}
rc = lyxp_eval(((struct lys_node_uses *)sparent)->when->cond, ctx_node, ctx_node_type, &set, LYXP_WHEN);
if (unlinked_nodes && ctx_node) {
if (resolve_when_relink_nodes(ctx_node, unlinked_nodes, ctx_node_type)) {
rc = -1;
goto cleanup;
}
}
if (rc) {
if (rc == 1) {
LOGVAL(LYE_INWHEN, LY_VLOG_LYD, node, ((struct lys_node_uses *)sparent)->when->cond);
}
goto cleanup;
}
lyxp_set_cast(&set, LYXP_SET_BOOLEAN, ctx_node, LYXP_WHEN);
if (!set.val.bool) {
LOGVAL(LYE_NOWHEN, LY_VLOG_LYD, node, ((struct lys_node_uses *)sparent)->when->cond);
node->when_status |= LYD_WHEN_FALSE;
goto cleanup;
}
/* free xpath set content */
lyxp_set_cast(&set, LYXP_SET_EMPTY, ctx_node, 0);
}
check_augment:
if ((sparent->parent && (sparent->parent->nodetype == LYS_AUGMENT) && (((struct lys_node_augment *)sparent->parent)->when))) {
if (!ctx_node) {
rc = resolve_when_ctx_node(node, sparent->parent, &ctx_node, &ctx_node_type);
if (rc) {
LOGINT;
goto cleanup;
}
}
unlinked_nodes = NULL;
tmp_node = node;
rc = resolve_when_unlink_nodes(sparent->parent, &tmp_node, &ctx_node, ctx_node_type, &unlinked_nodes);
if (rc) {
goto cleanup;
}
rc = lyxp_eval(((struct lys_node_augment *)sparent->parent)->when->cond, ctx_node, ctx_node_type, &set, LYXP_WHEN);
/* reconnect nodes, if ctx_node is NULL then all the nodes were unlinked, but linked together,
* so the tree did not actually change and there is nothing for us to do
*/
if (unlinked_nodes && ctx_node) {
if (resolve_when_relink_nodes(ctx_node, unlinked_nodes, ctx_node_type)) {
rc = -1;
goto cleanup;
}
}
if (rc) {
if (rc == 1) {
LOGVAL(LYE_INWHEN, LY_VLOG_LYD, node, ((struct lys_node_augment *)sparent->parent)->when->cond);
}
goto cleanup;
}
lyxp_set_cast(&set, LYXP_SET_BOOLEAN, ctx_node, LYXP_WHEN);
if (!set.val.bool) {
LOGVAL(LYE_NOWHEN, LY_VLOG_LYD, node, ((struct lys_node_augment *)sparent->parent)->when->cond);
node->when_status |= LYD_WHEN_FALSE;
goto cleanup;
}
/* free xpath set content */
lyxp_set_cast(&set, LYXP_SET_EMPTY, ctx_node, 0);
}
sparent = lys_parent(sparent);
}
node->when_status |= LYD_WHEN_TRUE;
cleanup:
/* free xpath set content */
lyxp_set_cast(&set, LYXP_SET_EMPTY, ctx_node ? ctx_node : node, 0);
if (result) {
if (node->when_status & LYD_WHEN_TRUE) {
*result = 1;
} else {
*result = 0;
}
}
return rc;
}
static int
check_leafref_features(struct lys_type *type)
{
struct lys_node *iter;
struct ly_set *src_parents, *trg_parents, *features;
unsigned int i, j, size, x;
int ret = EXIT_SUCCESS;
assert(type->parent);
src_parents = ly_set_new();
trg_parents = ly_set_new();
features = ly_set_new();
/* get parents chain of source (leafref) */
for (iter = (struct lys_node *)type->parent; iter; iter = iter->parent) {
if (iter->nodetype & (LYS_INPUT | LYS_OUTPUT)) {
continue;
}
ly_set_add(src_parents, iter, LY_SET_OPT_USEASLIST);
}
/* get parents chain of target */
for (iter = (struct lys_node *)type->info.lref.target; iter; iter = iter->parent) {
if (iter->nodetype & (LYS_INPUT | LYS_OUTPUT)) {
continue;
}
ly_set_add(trg_parents, iter, LY_SET_OPT_USEASLIST);
}
/* compare the features used in if-feature statements in the rest of both
* chains of parents. The set of features used for target must be a subset
* of features used for the leafref. This is not a perfect, we should compare
* the truth tables but it could require too much resources, so we simplify that */
for (i = 0; i < src_parents->number; i++) {
iter = src_parents->set.s[i]; /* shortcut */
if (!iter->iffeature_size) {
continue;
}
for (j = 0; j < iter->iffeature_size; j++) {
resolve_iffeature_getsizes(&iter->iffeature[j], NULL, &size);
for (; size; size--) {
if (!iter->iffeature[j].features[size - 1]) {
/* not yet resolved feature, postpone this check */
ret = EXIT_FAILURE;
goto cleanup;
}
ly_set_add(features, iter->iffeature[j].features[size - 1], 0);
}
}
}
x = features->number;
for (i = 0; i < trg_parents->number; i++) {
iter = trg_parents->set.s[i]; /* shortcut */
if (!iter->iffeature_size) {
continue;
}
for (j = 0; j < iter->iffeature_size; j++) {
resolve_iffeature_getsizes(&iter->iffeature[j], NULL, &size);
for (; size; size--) {
if (!iter->iffeature[j].features[size - 1]) {
/* not yet resolved feature, postpone this check */
ret = EXIT_FAILURE;
goto cleanup;
}
if ((unsigned int)ly_set_add(features, iter->iffeature[j].features[size - 1], 0) >= x) {
/* the feature is not present in features set of target's parents chain */
LOGVAL(LYE_NORESOLV, LY_VLOG_LYS, type->parent, "leafref", type->info.lref.path);
LOGVAL(LYE_SPEC, LY_VLOG_LYS, type->parent,
"Leafref is not conditional based on \"%s\" feature as its target.",
iter->iffeature[j].features[size - 1]->name);
ret = -1;
goto cleanup;
}
}
}
}
cleanup:
ly_set_free(features);
ly_set_free(src_parents);
ly_set_free(trg_parents);
return ret;
}
/**
* @brief Resolve a single unres schema item. Logs indirectly.
*
* @param[in] mod Main module.
* @param[in] item Item to resolve. Type determined by \p type.
* @param[in] type Type of the unresolved item.
* @param[in] str_snode String, a schema node, or NULL.
* @param[in] unres Unres schema structure to use.
*
* @return EXIT_SUCCESS on success, EXIT_FAILURE on forward reference, -1 on error.
*/
static int
resolve_unres_schema_item(struct lys_module *mod, void *item, enum UNRES_ITEM type, void *str_snode,
struct unres_schema *unres)
{
/* has_str - whether the str_snode is a string in a dictionary that needs to be freed */
int rc = -1, has_str = 0, tpdf_flag = 0, i, k;
unsigned int j;
struct lys_node *node, *par_grp;
const char *expr;
struct ly_set *refs, *procs;
struct lys_feature *ref, *feat;
struct lys_ident *ident;
struct lys_type *stype;
struct lys_node_choice *choic;
struct lyxml_elem *yin;
struct yang_type *yang;
struct unres_list_uniq *unique_info;
struct unres_iffeat_data *iff_data;
switch (type) {
case UNRES_IDENT:
expr = str_snode;
has_str = 1;
ident = item;
rc = resolve_base_ident(mod, ident, expr, "identity", NULL, unres);
break;
case UNRES_TYPE_IDENTREF:
expr = str_snode;
has_str = 1;
stype = item;
rc = resolve_base_ident(mod, NULL, expr, "type", stype, unres);
break;
case UNRES_TYPE_LEAFREF:
node = str_snode;
stype = item;
/* HACK - when there is no parent, we are in top level typedef and in that
* case, the path has to contain absolute path, so we let the resolve_path_arg_schema()
* know it via tpdf_flag */
if (!node) {
tpdf_flag = 1;
node = (struct lys_node *)stype->parent;
}
if (!lys_node_module(node)->implemented) {
/* not implemented module, don't bother with resolving the leafref
* if the module is set to be implemented, tha path will be resolved then */
rc = 0;
break;
}
rc = resolve_path_arg_schema(stype->info.lref.path, node, tpdf_flag,
(const struct lys_node **)&stype->info.lref.target);
if (!tpdf_flag && !rc) {
assert(stype->info.lref.target);
/* check if leafref and its target are under a common if-features */
rc = check_leafref_features(stype);
if (rc) {
break;
}
/* store the backlink from leafref target */
if (lys_leaf_add_leafref_target(stype->info.lref.target, (struct lys_node *)stype->parent)) {
rc = -1;
}
}
break;
case UNRES_TYPE_DER_TPDF:
tpdf_flag = 1;
/* no break */
case UNRES_TYPE_DER:
/* parent */
node = str_snode;
stype = item;
/* HACK type->der is temporarily unparsed type statement */
yin = (struct lyxml_elem *)stype->der;
stype->der = NULL;
if (yin->flags & LY_YANG_STRUCTURE_FLAG) {
yang = (struct yang_type *)yin;
rc = yang_check_type(mod, node, yang, tpdf_flag, unres);
if (rc) {
/* may try again later */
stype->der = (struct lys_tpdf *)yang;
} else {
/* we need to always be able to free this, it's safe only in this case */
lydict_remove(mod->ctx, yang->name);
free(yang);
}
} else {
rc = fill_yin_type(mod, node, yin, stype, tpdf_flag, unres);
if (!rc) {
/* we need to always be able to free this, it's safe only in this case */
lyxml_free(mod->ctx, yin);
} else {
/* may try again later, put all back how it was */
stype->der = (struct lys_tpdf *)yin;
}
}
if (rc == EXIT_SUCCESS) {
/* it does not make sense to have leaf-list of empty type */
if (!tpdf_flag && node->nodetype == LYS_LEAFLIST && stype->base == LY_TYPE_EMPTY) {
LOGWRN("The leaf-list \"%s\" is of \"empty\" type, which does not make sense.", node->name);
}
} else if (rc == EXIT_FAILURE && stype->base != LY_TYPE_ERR) {
/* forward reference - in case the type is in grouping, we have to make the grouping unusable
* by uses statement until the type is resolved. We do that the same way as uses statements inside
* grouping - the grouping's nacm member (not used un grouping) is used to increase the number of
* so far unresolved items (uses and types). The grouping cannot be used unless the nacm value is 0.
* To remember that the grouping already increased grouping's nacm, the LY_TYPE_ERR is used as value
* of the type's base member. */
for (par_grp = node; par_grp && (par_grp->nodetype != LYS_GROUPING); par_grp = lys_parent(par_grp));
if (par_grp) {
((struct lys_node_grp *)par_grp)->nacm++;
stype->base = LY_TYPE_ERR;
}
}
break;
case UNRES_IFFEAT:
iff_data = str_snode;
rc = resolve_feature(iff_data->fname, strlen(iff_data->fname), iff_data->node, item);
if (!rc) {
/* success */
lydict_remove(mod->ctx, iff_data->fname);
free(iff_data);
}
break;
case UNRES_FEATURE:
feat = (struct lys_feature *)item;
if (feat->iffeature_size) {
refs = ly_set_new();
procs = ly_set_new();
ly_set_add(procs, feat, 0);
while (procs->number) {
ref = procs->set.g[procs->number - 1];
ly_set_rm_index(procs, procs->number - 1);
for (i = 0; i < ref->iffeature_size; i++) {
resolve_iffeature_getsizes(&ref->iffeature[i], NULL, &j);
for (; j > 0 ; j--) {
if (ref->iffeature[i].features[j - 1]) {
if (ref->iffeature[i].features[j - 1] == feat) {
LOGVAL(LYE_CIRC_FEATURES, LY_VLOG_NONE, NULL, feat->name);
goto featurecheckdone;
}
if (ref->iffeature[i].features[j - 1]->iffeature_size) {
k = refs->number;
if (ly_set_add(refs, ref->iffeature[i].features[j - 1], 0) == k) {
/* not yet seen feature, add it for processing */
ly_set_add(procs, ref->iffeature[i].features[j - 1], 0);
}
}
} else {
/* forward reference */
rc = EXIT_FAILURE;
goto featurecheckdone;
}
}
}
}
rc = EXIT_SUCCESS;
featurecheckdone:
ly_set_free(refs);
ly_set_free(procs);
}
break;
case UNRES_USES:
rc = resolve_unres_schema_uses(item, unres);
break;
case UNRES_TYPE_DFLT:
expr = str_snode;
has_str = 1;
stype = item;
rc = check_default(stype, expr, mod);
break;
case UNRES_CHOICE_DFLT:
expr = str_snode;
has_str = 1;
choic = item;
if (!choic->dflt) {
choic->dflt = resolve_choice_dflt(choic, expr);
}
if (choic->dflt) {
rc = lyp_check_mandatory_choice((struct lys_node *)choic);
} else {
rc = EXIT_FAILURE;
}
break;
case UNRES_LIST_KEYS:
has_str = 1;
rc = resolve_list_keys(item, str_snode);
break;
case UNRES_LIST_UNIQ:
unique_info = (struct unres_list_uniq *)item;
rc = resolve_unique(unique_info->list, unique_info->expr, unique_info->trg_type);
break;
case UNRES_AUGMENT:
rc = resolve_augment(item, NULL);
break;
case UNRES_XPATH:
node = (struct lys_node *)item;
rc = check_node_xpath(node);
break;
default:
LOGINT;
break;
}
if (has_str && !rc) {
/* the string is no more needed in case of success.
* In case of forward reference, we will try to resolve the string later */
lydict_remove(mod->ctx, str_snode);
}
return rc;
}
/* logs directly */
static void
print_unres_schema_item_fail(void *item, enum UNRES_ITEM type, void *str_node)
{
struct lyxml_elem *xml;
struct lyxml_attr *attr;
struct unres_iffeat_data *iff_data;
const char *type_name = NULL;
switch (type) {
case UNRES_IDENT:
LOGVRB("Resolving %s \"%s\" failed, it will be attempted later.", "identity", (char *)str_node);
break;
case UNRES_TYPE_IDENTREF:
LOGVRB("Resolving %s \"%s\" failed, it will be attempted later.", "identityref", (char *)str_node);
break;
case UNRES_TYPE_LEAFREF:
LOGVRB("Resolving %s \"%s\" failed, it will be attempted later.", "leafref",
((struct lys_type *)item)->info.lref.path);
break;
case UNRES_TYPE_DER_TPDF:
case UNRES_TYPE_DER:
xml = (struct lyxml_elem *)((struct lys_type *)item)->der;
if (xml->flags & LY_YANG_STRUCTURE_FLAG) {
type_name = ((struct yang_type *)xml)->name;
} else {
LY_TREE_FOR(xml->attr, attr) {
if ((attr->type == LYXML_ATTR_STD) && !strcmp(attr->name, "name")) {
type_name = attr->value;
break;
}
}
assert(attr);
}
LOGVRB("Resolving %s \"%s\" failed, it will be attempted later.", "derived type", type_name);
break;
case UNRES_IFFEAT:
iff_data = str_node;
LOGVRB("Resolving %s \"%s\" failed, it will be attempted later.", "if-feature", iff_data->fname);
break;
case UNRES_FEATURE:
LOGVRB("There are unresolved if-features for \"%s\" feature circular dependency check, it will be attempted later",
((struct lys_feature *)item)->name);
break;
case UNRES_USES:
LOGVRB("Resolving %s \"%s\" failed, it will be attempted later.", "uses", ((struct lys_node_uses *)item)->name);
break;
case UNRES_TYPE_DFLT:
if (str_node) {
LOGVRB("Resolving %s \"%s\" failed, it will be attempted later.", "type default", (char *)str_node);
} /* else no default value in the type itself, but we are checking some restrictions against
* possible default value of some base type. The failure is caused by not resolved base type,
* so it was already reported */
break;
case UNRES_CHOICE_DFLT:
LOGVRB("Resolving %s \"%s\" failed, it will be attempted later.", "choice default", (char *)str_node);
break;
case UNRES_LIST_KEYS:
LOGVRB("Resolving %s \"%s\" failed, it will be attempted later.", "list keys", (char *)str_node);
break;
case UNRES_LIST_UNIQ:
LOGVRB("Resolving %s \"%s\" failed, it will be attempted later.", "list unique", (char *)str_node);
break;
case UNRES_AUGMENT:
LOGVRB("Resolving %s \"%s\" failed, it will be attempted later.", "augment target",
((struct lys_node_augment *)item)->target_name);
break;
case UNRES_XPATH:
LOGVRB("Resolving %s \"%s\" with the context node \"%s\" failed, it will be attempted later.", "XPath",
(char *)str_node, ((struct lys_node *)item)->name);
break;
default:
LOGINT;
break;
}
}
/**
* @brief Resolve every unres schema item in the structure. Logs directly.
*
* @param[in] mod Main module.
* @param[in] unres Unres schema structure to use.
*
* @return EXIT_SUCCESS on success, -1 on error.
*/
int
resolve_unres_schema(struct lys_module *mod, struct unres_schema *unres)
{
uint32_t i, resolved = 0, unres_count, res_count;
int rc;
assert(unres);
LOGVRB("Resolving \"%s\" unresolved schema nodes and their constraints...", mod->name);
ly_vlog_hide(1);
/* uses */
do {
unres_count = 0;
res_count = 0;
for (i = 0; i < unres->count; ++i) {
/* UNRES_TYPE_LEAFREF must be resolved (for storing leafref target pointers);
* if-features are resolved here to make sure that we will have all if-features for
* later check of feature circular dependency */
if (unres->type[i] > UNRES_IDENT) {
continue;
}
/* processes UNRES_USES, UNRES_IFFEAT, UNRES_TYPE_DER, UNRES_TYPE_DER_TPDF, UNRES_TYPE_LEAFREF,
* UNRES_CHOICE_DFLT and UNRES_IDENT */
++unres_count;
rc = resolve_unres_schema_item(mod, unres->item[i], unres->type[i], unres->str_snode[i], unres);
if (!rc) {
unres->type[i] = UNRES_RESOLVED;
++resolved;
++res_count;
} else if (rc == -1) {
ly_vlog_hide(0);
/* print the error */
resolve_unres_schema_item(mod, unres->item[i], unres->type[i], unres->str_snode[i], unres);
return -1;
} else {
/* forward reference, erase ly_errno */
ly_errno = LY_SUCCESS;
ly_vecode = LYVE_SUCCESS;
}
}
} while (res_count && (res_count < unres_count));
if (res_count < unres_count) {
/* just print the errors */
ly_vlog_hide(0);
for (i = 0; i < unres->count; ++i) {
if (unres->type[i] > UNRES_IDENT) {
continue;
}
resolve_unres_schema_item(mod, unres->item[i], unres->type[i], unres->str_snode[i], unres);
}
return -1;
}
/* the rest */
for (i = 0; i < unres->count; ++i) {
if (unres->type[i] == UNRES_RESOLVED) {
continue;
}
rc = resolve_unres_schema_item(mod, unres->item[i], unres->type[i], unres->str_snode[i], unres);
if (rc == 0) {
if (unres->type[i] == UNRES_LIST_UNIQ) {
/* free the allocated structure */
free(unres->item[i]);
}
unres->type[i] = UNRES_RESOLVED;
++resolved;
} else if (rc == -1) {
ly_vlog_hide(0);
/* print the error */
resolve_unres_schema_item(mod, unres->item[i], unres->type[i], unres->str_snode[i], unres);
return -1;
}
}
ly_vlog_hide(0);
if (resolved < unres->count) {
/* try to resolve the unresolved nodes again, it will not resolve anything, but it will print
* all the validation errors
*/
for (i = 0; i < unres->count; ++i) {
if (unres->type[i] == UNRES_RESOLVED) {
continue;
}
resolve_unres_schema_item(mod, unres->item[i], unres->type[i], unres->str_snode[i], unres);
}
return -1;
}
LOGVRB("All \"%s\" schema nodes and constraints resolved.", mod->name);
unres->count = 0;
return EXIT_SUCCESS;
}
/**
* @brief Try to resolve an unres schema item with a string argument. Logs indirectly.
*
* @param[in] mod Main module.
* @param[in] unres Unres schema structure to use.
* @param[in] item Item to resolve. Type determined by \p type.
* @param[in] type Type of the unresolved item.
* @param[in] str String argument.
*
* @return EXIT_SUCCESS on success, EXIT_FAILURE on storing the item in unres, -1 on error.
*/
int
unres_schema_add_str(struct lys_module *mod, struct unres_schema *unres, void *item, enum UNRES_ITEM type,
const char *str)
{
int rc;
const char *dictstr;
dictstr = lydict_insert(mod->ctx, str, 0);
rc = unres_schema_add_node(mod, unres, item, type, (struct lys_node *)dictstr);
if (rc == -1) {
lydict_remove(mod->ctx, dictstr);
}
return rc;
}
/**
* @brief Try to resolve an unres schema item with a schema node argument. Logs indirectly.
*
* @param[in] mod Main module.
* @param[in] unres Unres schema structure to use.
* @param[in] item Item to resolve. Type determined by \p type.
* @param[in] type Type of the unresolved item. UNRES_TYPE_DER is handled specially!
* @param[in] snode Schema node argument.
*
* @return EXIT_SUCCESS on success, EXIT_FIALURE on storing the item in unres, -1 on error.
*/
int
unres_schema_add_node(struct lys_module *mod, struct unres_schema *unres, void *item, enum UNRES_ITEM type,
struct lys_node *snode)
{
int rc, log_hidden;
struct lyxml_elem *yin;
char *path, *msg;
assert(unres && item && ((type != UNRES_LEAFREF) && (type != UNRES_INSTID) && (type != UNRES_WHEN)
&& (type != UNRES_MUST)));
if (*ly_vlog_hide_location()) {
log_hidden = 1;
} else {
log_hidden = 0;
ly_vlog_hide(1);
}
rc = resolve_unres_schema_item(mod, item, type, snode, unres);
if (!log_hidden) {
ly_vlog_hide(0);
}
if (rc != EXIT_FAILURE) {
if (rc == -1 && ly_errno == LY_EVALID) {
if (ly_log_level >= LY_LLERR) {
path = strdup(ly_errpath());
msg = strdup(ly_errmsg());
LOGERR(LY_EVALID, "%s%s%s%s", msg, path[0] ? " (path: " : "", path[0] ? path : "", path[0] ? ")" : "");
free(path);
free(msg);
}
}
if (type == UNRES_LIST_UNIQ) {
/* free the allocated structure */
free(item);
} else if (rc == -1 && type == UNRES_IFFEAT) {
/* free the allocated resources */
free(*((char **)item));
}
return rc;
} else {
/* erase info about validation errors */
ly_errno = LY_SUCCESS;
ly_vecode = LYVE_SUCCESS;
}
print_unres_schema_item_fail(item, type, snode);
/* HACK unlinking is performed here so that we do not do any (NS) copying in vain */
if (type == UNRES_TYPE_DER || type == UNRES_TYPE_DER_TPDF) {
yin = (struct lyxml_elem *)((struct lys_type *)item)->der;
if (!(yin->flags & LY_YANG_STRUCTURE_FLAG)) {
lyxml_unlink_elem(mod->ctx, yin, 1);
((struct lys_type *)item)->der = (struct lys_tpdf *)yin;
}
}
unres->count++;
unres->item = ly_realloc(unres->item, unres->count*sizeof *unres->item);
if (!unres->item) {
LOGMEM;
return -1;
}
unres->item[unres->count-1] = item;
unres->type = ly_realloc(unres->type, unres->count*sizeof *unres->type);
if (!unres->type) {
LOGMEM;
return -1;
}
unres->type[unres->count-1] = type;
unres->str_snode = ly_realloc(unres->str_snode, unres->count*sizeof *unres->str_snode);
if (!unres->str_snode) {
LOGMEM;
return -1;
}
unres->str_snode[unres->count-1] = snode;
unres->module = ly_realloc(unres->module, unres->count*sizeof *unres->module);
if (!unres->module) {
LOGMEM;
return -1;
}
unres->module[unres->count-1] = mod;
return rc;
}
/**
* @brief Duplicate an unres schema item. Logs indirectly.
*
* @param[in] mod Main module.
* @param[in] unres Unres schema structure to use.
* @param[in] item Old item to be resolved.
* @param[in] type Type of the old unresolved item.
* @param[in] new_item New item to use in the duplicate.
*
* @return EXIT_SUCCESS on success, EXIT_FAILURE if item is not in unres, -1 on error.
*/
int
unres_schema_dup(struct lys_module *mod, struct unres_schema *unres, void *item, enum UNRES_ITEM type, void *new_item)
{
int i;
struct unres_list_uniq aux_uniq;
struct unres_iffeat_data *iff_data;
assert(item && new_item && ((type != UNRES_LEAFREF) && (type != UNRES_INSTID) && (type != UNRES_WHEN)));
/* hack for UNRES_LIST_UNIQ, which stores multiple items behind its item */
if (type == UNRES_LIST_UNIQ) {
aux_uniq.list = item;
aux_uniq.expr = ((struct unres_list_uniq *)new_item)->expr;
item = &aux_uniq;
}
i = unres_schema_find(unres, -1, item, type);
if (i == -1) {
if (type == UNRES_LIST_UNIQ) {
free(new_item);
}
return EXIT_FAILURE;
}
if ((type == UNRES_TYPE_LEAFREF) || (type == UNRES_USES) || (type == UNRES_TYPE_DFLT) ||
(type == UNRES_FEATURE) || (type == UNRES_LIST_UNIQ)) {
if (unres_schema_add_node(mod, unres, new_item, type, unres->str_snode[i]) == -1) {
LOGINT;
return -1;
}
} else if (type == UNRES_IFFEAT) {
/* duplicate unres_iffeature_data */
iff_data = malloc(sizeof *iff_data);
iff_data->fname = lydict_insert(mod->ctx, ((struct unres_iffeat_data *)unres->str_snode[i])->fname, 0);
iff_data->node = ((struct unres_iffeat_data *)unres->str_snode[i])->node;
if (unres_schema_add_node(mod, unres, new_item, type, (struct lys_node *)iff_data) == -1) {
LOGINT;
return -1;
}
} else {
if (unres_schema_add_str(mod, unres, new_item, type, unres->str_snode[i]) == -1) {
LOGINT;
return -1;
}
}
return EXIT_SUCCESS;
}
/* does not log */
int
unres_schema_find(struct unres_schema *unres, int start_on_backwards, void *item, enum UNRES_ITEM type)
{
int i;
struct unres_list_uniq *aux_uniq1, *aux_uniq2;
if (start_on_backwards > 0) {
i = start_on_backwards;
} else {
i = unres->count - 1;
}
for (; i > -1; i--) {
if (unres->type[i] != type) {
continue;
}
if (type != UNRES_LIST_UNIQ) {
if (unres->item[i] == item) {
break;
}
} else {
aux_uniq1 = (struct unres_list_uniq *)unres->item[i - 1];
aux_uniq2 = (struct unres_list_uniq *)item;
if ((aux_uniq1->list == aux_uniq2->list) && ly_strequal(aux_uniq1->expr, aux_uniq2->expr, 0)) {
break;
}
}
}
return i;
}
static void
unres_schema_free_item(struct ly_ctx *ctx, struct unres_schema *unres, uint32_t i)
{
struct lyxml_elem *yin;
struct yang_type *yang;
struct unres_iffeat_data *iff_data;
switch (unres->type[i]) {
case UNRES_TYPE_DER_TPDF:
case UNRES_TYPE_DER:
yin = (struct lyxml_elem *)((struct lys_type *)unres->item[i])->der;
if (yin->flags & LY_YANG_STRUCTURE_FLAG) {
yang =(struct yang_type *)yin;
yang->type->base = yang->base;
lydict_remove(ctx, yang->name);
free(yang);
} else {
lyxml_free(ctx, yin);
}
break;
case UNRES_IFFEAT:
iff_data = (struct unres_iffeat_data *)unres->str_snode[i];
lydict_remove(ctx, iff_data->fname);
free(unres->str_snode[i]);
break;
case UNRES_IDENT:
case UNRES_TYPE_IDENTREF:
case UNRES_TYPE_DFLT:
case UNRES_CHOICE_DFLT:
case UNRES_LIST_KEYS:
lydict_remove(ctx, (const char *)unres->str_snode[i]);
break;
case UNRES_LIST_UNIQ:
free(unres->item[i]);
break;
default:
break;
}
unres->type[i] = UNRES_RESOLVED;
}
void
unres_schema_free(struct lys_module *module, struct unres_schema **unres)
{
uint32_t i;
unsigned int unresolved = 0;
if (!unres || !(*unres)) {
return;
}
assert(module || (*unres)->count == 0);
for (i = 0; i < (*unres)->count; ++i) {
if ((*unres)->module[i] != module) {
if ((*unres)->type[i] != UNRES_RESOLVED) {
unresolved++;
}
continue;
}
/* free heap memory for the specific item */
unres_schema_free_item(module->ctx, *unres, i);
}
/* free it all */
if (!module || (!unresolved && !module->type)) {
free((*unres)->item);
free((*unres)->type);
free((*unres)->str_snode);
free((*unres)->module);
free((*unres));
(*unres) = NULL;
}
}
static int resolve_union(struct lyd_node_leaf_list *leaf, struct lys_type *type);
static int
resolve_leafref(struct lyd_node_leaf_list *leaf, struct lys_type *type)
{
struct unres_data matches;
uint32_t i;
assert(type->base == LY_TYPE_LEAFREF);
/* init */
memset(&matches, 0, sizeof matches);
/* EXIT_FAILURE return keeps leaf->value.lefref NULL, handled later */
if (resolve_path_arg_data((struct lyd_node *)leaf, type->info.lref.path, &matches) == -1) {
return -1;
}
/* check that value matches */
for (i = 0; i < matches.count; ++i) {
if (ly_strequal(leaf->value_str, ((struct lyd_node_leaf_list *)matches.node[i])->value_str, 1)) {
leaf->value.leafref = matches.node[i];
break;
}
}
free(matches.node);
if (!leaf->value.leafref) {
/* reference not found */
if (type->info.lref.req > -1) {
LOGVAL(LYE_NOLEAFREF, LY_VLOG_LYD, leaf, type->info.lref.path, leaf->value_str);
return EXIT_FAILURE;
} else {
LOGVRB("There is no leafref with the value \"%s\", but it is not required.", leaf->value_str);
}
}
return EXIT_SUCCESS;
}
API LY_DATA_TYPE
lyd_leaf_type(const struct lyd_node_leaf_list *leaf)
{
struct lyd_node *node;
struct lys_type *type, *type_iter;
lyd_val value;
int f = 0, r;
if (!leaf || !(leaf->schema->nodetype & (LYS_LEAF | LYS_LEAFLIST))) {
return LY_TYPE_ERR;
}
if (leaf->value_type > 0 && (leaf->value_type & LY_DATA_TYPE_MASK) != LY_TYPE_UNION &&
(leaf->value_type & LY_DATA_TYPE_MASK) != LY_TYPE_LEAFREF) {
/* we can get the type directly from the data node (it was already resolved) */
return leaf->value_type & LY_DATA_TYPE_MASK;
}
/* init */
type = &((struct lys_node_leaf *)leaf->schema)->type;
value = leaf->value;
ly_vlog_hide(1);
/* resolve until we get the real data type */
while (1) {
/* get the correct data type from schema */
switch (type->base) {
case LY_TYPE_LEAFREF:
type = &type->info.lref.target->type;
break; /* continue in while loop */
case LY_TYPE_UNION:
type_iter = NULL;
while ((type_iter = lyp_get_next_union_type(type, type_iter, &f))) {
if (type_iter->base == LY_TYPE_LEAFREF) {
if (type_iter->info.lref.req == -1) {
/* target not required, so it always succeeds */
break;
} else {
/* try to resolve leafref */
memset(&((struct lyd_node_leaf_list *)leaf)->value, 0, sizeof leaf->value);
r = resolve_leafref((struct lyd_node_leaf_list *)leaf, type_iter);
/* revert leaf's content affected by resolve_leafref */
((struct lyd_node_leaf_list *)leaf)->value = value;
if (!r) {
/* success, we can continue with the leafref type */
break;
}
}
} else if (type_iter->base == LY_TYPE_INST) {
if (type_iter->info.inst.req == -1) {
/* target not required, so it always succeeds */
return LY_TYPE_INST;
} else {
/* try to resolve instance-identifier */
ly_errno = 0;
node = resolve_instid((struct lyd_node *)leaf, leaf->value_str);
if (!ly_errno && node) {
/* the real type is instance-identifier */
return LY_TYPE_INST;
}
}
} else {
r = lyp_parse_value_type((struct lyd_node_leaf_list *)leaf, type_iter, 1);
/* revert leaf's content affected by resolve_leafref */
((struct lyd_node_leaf_list *)leaf)->value = value;
if (!r) {
/* we have the real type */
return type_iter->base;
}
}
f = 0;
}
/* erase ly_errno and ly_vecode */
ly_errno = LY_SUCCESS;
ly_vecode = LYVE_SUCCESS;
if (!type_iter) {
LOGERR(LY_EINVAL, "Unable to get type from union \"%s\" with no valid type.", type->parent->name)
return LY_TYPE_ERR;
}
type = type_iter;
break;
default:
/* we have the real type */
ly_vlog_hide(0);
return type->base;
}
}
ly_vlog_hide(0);
return LY_TYPE_ERR;
}
static int
resolve_union(struct lyd_node_leaf_list *leaf, struct lys_type *type)
{
struct lys_type *datatype = NULL;
int f = 0;
assert(type->base == LY_TYPE_UNION);
memset(&leaf->value, 0, sizeof leaf->value);
while ((datatype = lyp_get_next_union_type(type, datatype, &f))) {
leaf->value_type = datatype->base;
if (datatype->base == LY_TYPE_LEAFREF) {
/* try to resolve leafref */
if (!resolve_leafref(leaf, datatype)) {
/* success */
break;
}
} else if (datatype->base == LY_TYPE_INST) {
/* try to resolve instance-identifier */
ly_errno = 0;
leaf->value.instance = resolve_instid((struct lyd_node *)leaf, leaf->value_str);
if (!ly_errno && (leaf->value.instance || datatype->info.inst.req == -1)) {
/* success */
break;
}
} else {
if (!lyp_parse_value_type(leaf, datatype, 1)) {
/* success */
break;
}
}
f = 0;
}
/* erase ly_errno and ly_vecode */
ly_errno = LY_SUCCESS;
ly_vecode = LYVE_SUCCESS;
if (!datatype) {
/* failure */
LOGVAL(LYE_INVAL, LY_VLOG_LYD, leaf, (leaf->value_str ? leaf->value_str : ""), leaf->schema->name);
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
/**
* @brief Resolve a single unres data item. Logs directly.
*
* @param[in] node Data node to resolve.
* @param[in] type Type of the unresolved item.
*
* @return EXIT_SUCCESS on success, EXIT_FAILURE on forward reference, -1 on error.
*/
int
resolve_unres_data_item(struct lyd_node *node, enum UNRES_ITEM type)
{
int rc;
struct lyd_node_leaf_list *leaf;
struct lys_node_leaf *sleaf;
struct lyd_node *parent;
leaf = (struct lyd_node_leaf_list *)node;
sleaf = (struct lys_node_leaf *)leaf->schema;
switch (type) {
case UNRES_LEAFREF:
assert(sleaf->type.base == LY_TYPE_LEAFREF);
return resolve_leafref(leaf, &sleaf->type);
case UNRES_INSTID:
assert(sleaf->type.base == LY_TYPE_INST);
ly_errno = 0;
leaf->value.instance = resolve_instid(node, leaf->value_str);
if (!leaf->value.instance) {
if (ly_errno) {
return -1;
} else if (sleaf->type.info.inst.req > -1) {
LOGVAL(LYE_NOREQINS, LY_VLOG_LYD, leaf, leaf->value_str);
return EXIT_FAILURE;
} else {
LOGVRB("There is no instance identifier \"%s\", but it is not required.", leaf->value_str);
}
}
break;
case UNRES_UNION:
assert(sleaf->type.base == LY_TYPE_UNION);
return resolve_union(leaf, &sleaf->type);
case UNRES_WHEN:
if ((rc = resolve_when(node, NULL))) {
return rc;
}
break;
case UNRES_MUST:
if ((rc = resolve_must(node, 0))) {
return rc;
}
break;
case UNRES_MUST_INOUT:
if ((rc = resolve_must(node, 1))) {
return rc;
}
break;
case UNRES_EMPTYCONT:
do {
parent = node->parent;
lyd_free(node);
node = parent;
} while (node && (node->schema->nodetype == LYS_CONTAINER) && !node->child
&& !((struct lys_node_container *)node->schema)->presence);
break;
default:
LOGINT;
return -1;
}
return EXIT_SUCCESS;
}
/**
* @brief add data unres item
*
* @param[in] unres Unres data structure to use.
* @param[in] node Data node to use.
*
* @return 0 on success, -1 on error.
*/
int
unres_data_add(struct unres_data *unres, struct lyd_node *node, enum UNRES_ITEM type)
{
assert(unres && node);
assert((type == UNRES_LEAFREF) || (type == UNRES_INSTID) || (type == UNRES_WHEN) || (type == UNRES_MUST)
|| (type == UNRES_MUST_INOUT) || (type == UNRES_UNION) || (type == UNRES_EMPTYCONT));
unres->count++;
unres->node = ly_realloc(unres->node, unres->count * sizeof *unres->node);
if (!unres->node) {
LOGMEM;
return -1;
}
unres->node[unres->count - 1] = node;
unres->type = ly_realloc(unres->type, unres->count * sizeof *unres->type);
if (!unres->type) {
LOGMEM;
return -1;
}
unres->type[unres->count - 1] = type;
if (type == UNRES_WHEN) {
/* remove previous result */
node->when_status = LYD_WHEN;
}
return EXIT_SUCCESS;
}
/**
* @brief Resolve every unres data item in the structure. Logs directly.
*
* If options includes LYD_OPT_TRUSTED, the data are considered trusted (when, must conditions are not expected,
* unresolved leafrefs/instids are accepted).
*
* If options includes LYD_OPT_NOAUTODEL, the false resulting when condition on non-default nodes, the error is raised.
*
* @param[in] unres Unres data structure to use.
* @param[in,out] root Root node of the data tree, can be changed due to autodeletion.
* @param[in] options Data options as described above.
*
* @return EXIT_SUCCESS on success, -1 on error.
*/
int
resolve_unres_data(struct unres_data *unres, struct lyd_node **root, int options)
{
uint32_t i, j, first = 1, resolved = 0, del_items = 0, when_stmt = 0;
int rc, progress;
char *msg, *path;
struct lyd_node *parent;
struct lyd_node_leaf_list *leaf;
assert(root);
assert(unres);
if (!unres->count) {
return EXIT_SUCCESS;
}
LOGVRB("Resolving unresolved data nodes and their constraints...");
ly_vlog_hide(1);
/* when-stmt first */
ly_errno = LY_SUCCESS;
ly_vecode = LYVE_SUCCESS;
do {
progress = 0;
for (i = 0; i < unres->count; i++) {
if (unres->type[i] != UNRES_WHEN) {
continue;
}
assert(!(options & LYD_OPT_TRUSTED));
if (first) {
/* count when-stmt nodes in unres list */
when_stmt++;
}
/* resolve when condition only when all parent when conditions are already resolved */
for (parent = unres->node[i]->parent;
parent && LYD_WHEN_DONE(parent->when_status);
parent = parent->parent) {
if (!parent->parent && (parent->when_status & LYD_WHEN_FALSE)) {
/* the parent node was already unlinked, do not resolve this node,
* it will be removed anyway, so just mark it as resolved
*/
unres->node[i]->when_status |= LYD_WHEN_FALSE;
unres->type[i] = UNRES_RESOLVED;
resolved++;
break;
}
}
if (parent) {
continue;
}
rc = resolve_unres_data_item(unres->node[i], unres->type[i]);
if (!rc) {
if (unres->node[i]->when_status & LYD_WHEN_FALSE) {
if ((options & LYD_OPT_NOAUTODEL) && !unres->node[i]->dflt) {
/* false when condition */
ly_vlog_hide(0);
if (ly_log_level >= LY_LLERR) {
path = strdup(ly_errpath());
msg = strdup(ly_errmsg());
LOGERR(LY_EVALID, "%s%s%s%s", msg,
path[0] ? " (path: " : "", path[0] ? path : "", path[0] ? ")" : "");
free(path);
free(msg);
}
return -1;
} /* follows else */
/* only unlink now, the subtree can contain another nodes stored in the unres list */
/* if it has parent non-presence containers that would be empty, we should actually
* remove the container
*/
for (parent = unres->node[i];
parent->parent && parent->parent->schema->nodetype == LYS_CONTAINER;
parent = parent->parent) {
if (((struct lys_node_container *)parent->parent->schema)->presence) {
/* presence container */
break;
}
if (parent->next || parent->prev != parent) {
/* non empty (the child we are in and we are going to remove is not the only child) */
break;
}
}
unres->node[i] = parent;
/* auto-delete */
LOGVRB("auto-delete node \"%s\" due to when condition (%s)", ly_errpath(),
((struct lys_node_leaf *)unres->node[i]->schema)->when->cond);
if (*root && *root == unres->node[i]) {
*root = (*root)->next;
}
lyd_unlink(unres->node[i]);
unres->type[i] = UNRES_DELETE;
del_items++;
/* update the rest of unres items */
for (j = 0; j < unres->count; j++) {
if (unres->type[j] == UNRES_RESOLVED || unres->type[j] == UNRES_DELETE) {
continue;
}
/* test if the node is in subtree to be deleted */
for (parent = unres->node[j]; parent; parent = parent->parent) {
if (parent == unres->node[i]) {
/* yes, it is */
unres->type[j] = UNRES_RESOLVED;
resolved++;
break;
}
}
}
} else {
unres->type[i] = UNRES_RESOLVED;
}
ly_errno = LY_SUCCESS;
ly_vecode = LYVE_SUCCESS;
resolved++;
progress = 1;
} else if (rc == -1) {
ly_vlog_hide(0);
/* print only this last error */
resolve_unres_data_item(unres->node[i], unres->type[i]);
return -1;
} else {
/* forward reference, erase ly_errno */
ly_errno = LY_SUCCESS;
}
}
first = 0;
} while (progress && resolved < when_stmt);
/* do we have some unresolved when-stmt? */
if (when_stmt > resolved) {
ly_vlog_hide(0);
if (ly_log_level >= LY_LLERR) {
path = strdup(ly_errpath());
msg = strdup(ly_errmsg());
LOGERR(LY_EVALID, "%s%s%s%s", msg, path[0] ? " (path: " : "", path[0] ? path : "", path[0] ? ")" : "");
free(path);
free(msg);
}
return -1;
}
for (i = 0; del_items && i < unres->count; i++) {
/* we had some when-stmt resulted to false, so now we have to sanitize the unres list */
if (unres->type[i] != UNRES_DELETE) {
continue;
}
if (!unres->node[i]) {
unres->type[i] = UNRES_RESOLVED;
del_items--;
continue;
}
/* really remove the complete subtree */
lyd_free(unres->node[i]);
unres->type[i] = UNRES_RESOLVED;
del_items--;
}
/* rest */
for (i = 0; i < unres->count; ++i) {
if (unres->type[i] == UNRES_RESOLVED) {
continue;
}
assert(!(options & LYD_OPT_TRUSTED) || ((unres->type[i] != UNRES_MUST) && (unres->type[i] != UNRES_MUST_INOUT)));
rc = resolve_unres_data_item(unres->node[i], unres->type[i]);
if (rc == -1) {
ly_vlog_hide(0);
/* print only this last error */
resolve_unres_data_item(unres->node[i], unres->type[i]);
return -1;
} else if ((rc == 0) || ((options & LYD_OPT_TRUSTED) && ((unres->type[i] == UNRES_LEAFREF) || (unres->type[i] == UNRES_INSTID)))) {
unres->type[i] = UNRES_RESOLVED;
resolved++;
if (options & LYD_OPT_TRUSTED) {
/* accept it in this case */
if (unres->type[i] == UNRES_LEAFREF) {
LOGVRB("Leafref \"%s\" with value \"%s\" failed to be resolved.",
((struct lys_node_leaf *)unres->node[i]->schema)->type.info.lref.path,
((struct lyd_node_leaf_list *)unres->node[i])->value_str);
} else {
LOGVRB("Instance identifier \"%s\" failed to be resolved.",
((struct lyd_node_leaf_list *)unres->node[i])->value_str);
}
}
}
}
ly_vlog_hide(0);
if (resolved < unres->count) {
/* try to resolve the unresolved data again, it will not resolve anything, but it will print
* all the validation errors
*/
for (i = 0; i < unres->count; ++i) {
if (unres->type[i] == UNRES_UNION) {
/* does not make sense to print specific errors for all
* the data types, just print that the value is invalid */
leaf = (struct lyd_node_leaf_list *)unres->node[i];
LOGVAL(LYE_INVAL, LY_VLOG_LYD, unres->node[i], (leaf->value_str ? leaf->value_str : ""),
leaf->schema->name);
} else if (unres->type[i] != UNRES_RESOLVED) {
resolve_unres_data_item(unres->node[i], unres->type[i]);
}
}
return -1;
}
LOGVRB("All data nodes and constraints resolved.");
unres->count = 0;
return EXIT_SUCCESS;
}