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gerrit.cesnet.cz / github / CESNET / libyang / 5bb196da3c625775827a1f1129d105e0d3610217 / . / src / parser_xml.c
blob: af49f3d04b01cd8fa9768ff7ec33ca4d0a70e3f7 [file] [log] [blame]
/**
* @file parser_xml.c
* @author Radek Krejci <rkrejci@cesnet.cz>
* @author Michal Vasko <mvasko@cesnet.cz>
* @brief XML data parser for libyang
*
* Copyright (c) 2019 - 2022 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 <assert.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include "common.h"
#include "compat.h"
#include "context.h"
#include "dict.h"
#include "in_internal.h"
#include "log.h"
#include "parser_data.h"
#include "parser_internal.h"
#include "plugins_exts.h"
#include "plugins_internal.h"
#include "schema_compile_node.h"
#include "set.h"
#include "tree.h"
#include "tree_data.h"
#include "tree_data_internal.h"
#include "tree_schema.h"
#include "tree_schema_internal.h"
#include "validation.h"
#include "xml.h"
static LY_ERR lydxml_subtree_r(struct lyd_xml_ctx *lydctx, struct lyd_node *parent, struct lyd_node **first_p,
struct ly_set *parsed);
void
lyd_xml_ctx_free(struct lyd_ctx *lydctx)
{
struct lyd_xml_ctx *ctx = (struct lyd_xml_ctx *)lydctx;
lyd_ctx_free(lydctx);
lyxml_ctx_free(ctx->xmlctx);
free(ctx);
}
/**
* @brief Parse and create XML metadata.
*
* @param[in] lydctx XML data parser context.
* @param[in] sparent Schema node of the parent.
* @param[out] meta List of created metadata instances.
* @return LY_ERR value.
*/
static LY_ERR
lydxml_metadata(struct lyd_xml_ctx *lydctx, const struct lysc_node *sparent, struct lyd_meta **meta)
{
LY_ERR ret = LY_SUCCESS;
const struct lyxml_ns *ns;
struct lys_module *mod;
const char *name;
size_t name_len;
LY_ARRAY_COUNT_TYPE u;
ly_bool filter_attrs = 0;
struct lyxml_ctx *xmlctx = lydctx->xmlctx;
*meta = NULL;
LOG_LOCSET(sparent, NULL, NULL, NULL);
/* check for NETCONF filter unqualified attributes */
if (!strcmp(sparent->module->name, "notifications")) {
/* ancient module that does not even use the extension */
filter_attrs = 1;
} else {
LY_ARRAY_FOR(sparent->exts, u) {
if (!strcmp(sparent->exts[u].def->name, "get-filter-element-attributes") &&
!strcmp(sparent->exts[u].def->module->name, "ietf-netconf")) {
filter_attrs = 1;
break;
}
}
}
while (xmlctx->status == LYXML_ATTRIBUTE) {
if (!xmlctx->prefix_len) {
/* in XML all attributes must be prefixed except NETCONF filter ones marked by an extension */
if (filter_attrs && (!ly_strncmp("type", xmlctx->name, xmlctx->name_len) ||
!ly_strncmp("select", xmlctx->name, xmlctx->name_len))) {
mod = ly_ctx_get_module_implemented(xmlctx->ctx, "ietf-netconf");
if (!mod) {
LOGVAL(xmlctx->ctx, LYVE_REFERENCE,
"Missing (or not implemented) YANG module \"ietf-netconf\" for special filter attributes.");
ret = LY_ENOTFOUND;
goto cleanup;
}
goto create_meta;
}
if (lydctx->parse_opts & LYD_PARSE_STRICT) {
LOGVAL(xmlctx->ctx, LYVE_REFERENCE, "Missing mandatory prefix for XML metadata \"%.*s\".",
(int)xmlctx->name_len, xmlctx->name);
ret = LY_EVALID;
goto cleanup;
}
/* skip attr */
LY_CHECK_GOTO(ret = lyxml_ctx_next(xmlctx), cleanup);
assert(xmlctx->status == LYXML_ATTR_CONTENT);
LY_CHECK_GOTO(ret = lyxml_ctx_next(xmlctx), cleanup);
continue;
}
/* get namespace of the attribute to find its annotation definition */
ns = lyxml_ns_get(&xmlctx->ns, xmlctx->prefix, xmlctx->prefix_len);
if (!ns) {
/* unknown namespace, XML error */
LOGVAL(xmlctx->ctx, LYVE_REFERENCE, "Unknown XML prefix \"%.*s\".", (int)xmlctx->prefix_len, xmlctx->prefix);
ret = LY_ENOTFOUND;
goto cleanup;
}
/* get the module with metadata definition */
mod = ly_ctx_get_module_implemented_ns(xmlctx->ctx, ns->uri);
if (!mod) {
if (lydctx->parse_opts & LYD_PARSE_STRICT) {
LOGVAL(xmlctx->ctx, LYVE_REFERENCE,
"Unknown (or not implemented) YANG module with namespace \"%s\" for metadata \"%.*s%s%.*s\".",
ns->uri, (int)xmlctx->prefix_len, xmlctx->prefix, xmlctx->prefix_len ? ":" : "",
(int)xmlctx->name_len, xmlctx->name);
ret = LY_ENOTFOUND;
goto cleanup;
}
/* skip attr */
LY_CHECK_GOTO(ret = lyxml_ctx_next(xmlctx), cleanup);
assert(xmlctx->status == LYXML_ATTR_CONTENT);
LY_CHECK_GOTO(ret = lyxml_ctx_next(xmlctx), cleanup);
continue;
}
create_meta:
/* remember meta name and get its content */
name = xmlctx->name;
name_len = xmlctx->name_len;
LY_CHECK_GOTO(ret = lyxml_ctx_next(xmlctx), cleanup);
assert(xmlctx->status == LYXML_ATTR_CONTENT);
/* create metadata */
ret = lyd_parser_create_meta((struct lyd_ctx *)lydctx, NULL, meta, mod, name, name_len, xmlctx->value,
xmlctx->value_len, &xmlctx->dynamic, LY_VALUE_XML, &xmlctx->ns, LYD_HINT_DATA, sparent);
LY_CHECK_GOTO(ret, cleanup);
/* next attribute */
LY_CHECK_GOTO(ret = lyxml_ctx_next(xmlctx), cleanup);
}
cleanup:
LOG_LOCBACK(1, 0, 0, 0);
if (ret) {
lyd_free_meta_siblings(*meta);
*meta = NULL;
}
return ret;
}
static LY_ERR
lydxml_attrs(struct lyxml_ctx *xmlctx, struct lyd_attr **attr)
{
LY_ERR ret = LY_SUCCESS;
const struct lyxml_ns *ns;
void *val_prefix_data;
LY_VALUE_FORMAT format;
struct lyd_attr *attr2;
const char *name, *prefix;
size_t name_len, prefix_len;
assert(attr);
*attr = NULL;
while (xmlctx->status == LYXML_ATTRIBUTE) {
if (*attr) {
attr2 = *attr;
} else {
attr2 = NULL;
}
/* remember attr prefix, name, and get its content */
prefix = xmlctx->prefix;
prefix_len = xmlctx->prefix_len;
name = xmlctx->name;
name_len = xmlctx->name_len;
LY_CHECK_GOTO(ret = lyxml_ctx_next(xmlctx), cleanup);
assert(xmlctx->status == LYXML_ATTR_CONTENT);
/* handle special "xml" attribute prefix */
if ((prefix_len == 3) && !strncmp(prefix, "xml", 3)) {
name = prefix;
name_len += 1 + prefix_len;
prefix = NULL;
prefix_len = 0;
}
/* find namespace of the attribute, if any */
ns = NULL;
if (prefix_len) {
ns = lyxml_ns_get(&xmlctx->ns, prefix, prefix_len);
if (!ns) {
LOGVAL(xmlctx->ctx, LYVE_REFERENCE, "Unknown XML prefix \"%.*s\".", (int)prefix_len, prefix);
ret = LY_EVALID;
goto cleanup;
}
}
/* get value prefixes */
val_prefix_data = NULL;
LY_CHECK_GOTO(ret = ly_store_prefix_data(xmlctx->ctx, xmlctx->value, xmlctx->value_len, LY_VALUE_XML,
&xmlctx->ns, &format, &val_prefix_data), cleanup);
/* attr2 is always changed to the created attribute */
ret = lyd_create_attr(NULL, &attr2, xmlctx->ctx, name, name_len, prefix, prefix_len, ns ? ns->uri : NULL,
ns ? strlen(ns->uri) : 0, xmlctx->value, xmlctx->value_len, &xmlctx->dynamic, format, val_prefix_data,
LYD_HINT_DATA);
LY_CHECK_GOTO(ret, cleanup);
if (!*attr) {
*attr = attr2;
}
/* next attribute */
LY_CHECK_GOTO(ret = lyxml_ctx_next(xmlctx), cleanup);
}
cleanup:
if (ret) {
lyd_free_attr_siblings(xmlctx->ctx, *attr);
*attr = NULL;
}
return ret;
}
static LY_ERR
lydxml_check_list(struct lyxml_ctx *xmlctx, const struct lysc_node *list)
{
LY_ERR ret = LY_SUCCESS, r;
enum LYXML_PARSER_STATUS next;
struct ly_set key_set = {0};
const struct lysc_node *snode;
uint32_t i, parents_count;
assert(list && (list->nodetype == LYS_LIST));
/* get all keys into a set (keys do not have if-features or anything) */
snode = NULL;
while ((snode = lys_getnext(snode, list, NULL, 0)) && (snode->flags & LYS_KEY)) {
ret = ly_set_add(&key_set, (void *)snode, 1, NULL);
LY_CHECK_GOTO(ret, cleanup);
}
/* remember parent count */
parents_count = xmlctx->elements.count;
while (xmlctx->status == LYXML_ELEMENT) {
/* find key definition */
for (i = 0; i < key_set.count; ++i) {
snode = (const struct lysc_node *)key_set.objs[i];
if (!ly_strncmp(snode->name, xmlctx->name, xmlctx->name_len)) {
break;
}
}
LY_CHECK_GOTO(ret = lyxml_ctx_next(xmlctx), cleanup);
/* skip attributes */
while (xmlctx->status == LYXML_ATTRIBUTE) {
LY_CHECK_GOTO(ret = lyxml_ctx_next(xmlctx), cleanup);
assert(xmlctx->status == LYXML_ATTR_CONTENT);
LY_CHECK_GOTO(ret = lyxml_ctx_next(xmlctx), cleanup);
}
assert(xmlctx->status == LYXML_ELEM_CONTENT);
if (i < key_set.count) {
/* validate the value */
r = ly_value_validate(NULL, snode, xmlctx->value, xmlctx->value_len, LY_VALUE_XML, &xmlctx->ns, LYD_HINT_DATA);
if (!r) {
/* key with a valid value, remove from the set */
ly_set_rm_index(&key_set, i, NULL);
}
}
/* parser next */
LY_CHECK_GOTO(ret = lyxml_ctx_next(xmlctx), cleanup);
/* skip any children, resursively */
while (xmlctx->status == LYXML_ELEMENT) {
while (parents_count < xmlctx->elements.count) {
LY_CHECK_GOTO(ret = lyxml_ctx_next(xmlctx), cleanup);
}
assert(xmlctx->status == LYXML_ELEM_CLOSE);
LY_CHECK_GOTO(ret = lyxml_ctx_next(xmlctx), cleanup);
}
/* parser next, but do not parse closing element of the list because it would remove its namespaces */
assert(xmlctx->status == LYXML_ELEM_CLOSE);
LY_CHECK_GOTO(ret = lyxml_ctx_peek(xmlctx, &next), cleanup);
if (next != LYXML_ELEM_CLOSE) {
LY_CHECK_GOTO(ret = lyxml_ctx_next(xmlctx), cleanup);
}
}
if (key_set.count) {
/* some keys are missing/did not validate */
ret = LY_ENOT;
}
cleanup:
ly_set_erase(&key_set, NULL);
return ret;
}
/**
* @brief Skip an element with all its descendants.
*
* @param[in] xmlctx XML parser context.
* @return LY_ERR value.
*/
static LY_ERR
lydxml_data_skip(struct lyxml_ctx *xmlctx)
{
uint32_t parents_count;
/* remember current number of parents */
parents_count = xmlctx->elements.count;
assert(parents_count);
/* skip after the content */
while (xmlctx->status != LYXML_ELEM_CONTENT) {
LY_CHECK_RET(lyxml_ctx_next(xmlctx));
}
LY_CHECK_RET(lyxml_ctx_next(xmlctx));
/* skip all children elements, recursively, if any */
while (parents_count <= xmlctx->elements.count) {
LY_CHECK_RET(lyxml_ctx_next(xmlctx));
}
/* close element */
assert(xmlctx->status == LYXML_ELEM_CLOSE);
LY_CHECK_RET(lyxml_ctx_next(xmlctx));
return LY_SUCCESS;
}
/**
* @brief Check that the current element can be parsed as a data node.
*
* @param[in] lydctx XML data parser context.
* @param[in,out] snode Found schema node, set to NULL if data node cannot be created.
* @return LY_ERR value.
*/
static LY_ERR
lydxml_data_check_opaq(struct lyd_xml_ctx *lydctx, const struct lysc_node **snode)
{
LY_ERR ret = LY_SUCCESS;
struct lyxml_ctx *xmlctx = lydctx->xmlctx, pxmlctx;
if (!(lydctx->parse_opts & LYD_PARSE_OPAQ)) {
/* only checks specific to opaque nodes */
return LY_SUCCESS;
}
if (!((*snode)->nodetype & (LYD_NODE_TERM | LYD_NODE_INNER))) {
/* nothing to check */
return LY_SUCCESS;
}
assert(xmlctx->elements.count);
/* backup parser */
LY_CHECK_RET(lyxml_ctx_backup(xmlctx, &pxmlctx));
/* skip attributes */
while (xmlctx->status == LYXML_ATTRIBUTE) {
LY_CHECK_GOTO(ret = lyxml_ctx_next(xmlctx), restore);
LY_CHECK_GOTO(ret = lyxml_ctx_next(xmlctx), restore);
}
if ((*snode)->nodetype & LYD_NODE_TERM) {
/* value may not be valid in which case we parse it as an opaque node */
if (ly_value_validate(NULL, *snode, xmlctx->value, xmlctx->value_len, LY_VALUE_XML, &xmlctx->ns, LYD_HINT_DATA)) {
LOGVRB("Parsing opaque term node \"%s\" with invalid value \"%.*s\".", (*snode)->name, xmlctx->value_len,
xmlctx->value);
*snode = NULL;
}
} else if ((*snode)->nodetype == LYS_LIST) {
/* skip content */
LY_CHECK_GOTO(ret = lyxml_ctx_next(xmlctx), restore);
if (lydxml_check_list(xmlctx, *snode)) {
/* invalid list, parse as opaque if it missing/has invalid some keys */
LOGVRB("Parsing opaque list node \"%s\" with missing/invalid keys.", (*snode)->name);
*snode = NULL;
}
} else {
/* if there is a non-WS value, it cannot be parsed as an inner node */
assert(xmlctx->status == LYXML_ELEM_CONTENT);
if (!xmlctx->ws_only) {
*snode = NULL;
}
}
restore:
/* restore parser */
lyxml_ctx_restore(xmlctx, &pxmlctx);
return ret;
}
/**
* @brief Get sensible data hints for an opaque node.
*
* @param[in] name Node name.
* @param[in] name_len Length of @p name.
* @param[in] value Node value.
* @param[in] value_len Length of @p value.
* @param[in] first Node first sibling.
* @param[in] ns Node module namespace, NULL for no namespace.
* @param[out] hints Data hints to use.
* @param[out] anchor Anchor to insert after in case of a list.
*/
static void
lydxml_get_hints_opaq(const char *name, size_t name_len, const char *value, size_t value_len, const struct lyd_node *first,
const char *ns, uint32_t *hints, struct lyd_node **anchor)
{
struct lyd_node_opaq *opaq;
char *ptr;
long num;
*hints = 0;
*anchor = NULL;
if (!value_len) {
/* no value but it may also be zero-length string */
*hints |= LYD_VALHINT_EMPTY | LYD_VALHINT_STRING;
} else if (!strncmp(value, "true", value_len) || !strncmp(value, "false", value_len)) {
/* boolean value */
*hints |= LYD_VALHINT_BOOLEAN;
} else {
num = strtol(value, &ptr, 10);
if ((unsigned)(ptr - value) == value_len) {
/* number value */
*hints |= LYD_VALHINT_DECNUM;
if ((num < INT32_MIN) || (num > UINT32_MAX)) {
/* large number */
*hints |= LYD_VALHINT_NUM64;
}
} else {
/* string value */
*hints |= LYD_VALHINT_STRING;
}
}
if (!first) {
return;
}
/* search backwards to find the last instance */
do {
first = first->prev;
if (first->schema) {
continue;
}
opaq = (struct lyd_node_opaq *)first;
assert(opaq->format == LY_VALUE_XML);
if (!ly_strncmp(opaq->name.name, name, name_len) &&
((ns && !strcmp(opaq->name.module_ns, ns)) || (!ns && !opaq->name.module_ns))) {
if (opaq->value && opaq->value[0]) {
/* leaf-list nodes */
opaq->hints |= LYD_NODEHINT_LEAFLIST;
*hints |= LYD_NODEHINT_LEAFLIST;
} else {
/* list nodes */
opaq->hints |= LYD_NODEHINT_LIST;
*hints |= LYD_NODEHINT_LIST;
}
*anchor = (struct lyd_node *)first;
break;
}
} while (first->prev->next);
}
/**
* @brief Get schema node for the current element.
*
* @param[in] lydctx XML data parser context.
* @param[in] parent Parsed parent data node, if any.
* @param[in] prefix Element prefix, if any.
* @param[in] prefix_len Length of @p prefix.
* @param[in] name Element name.
* @param[in] name_len Length of @p name.
* @param[out] snode Found schema node, NULL if no suitable was found.
* @param[out] ext Extension instance that provided @p snode, if any.
* @return LY_SUCCESS on success;
* @return LY_ERR on error.
*/
static LY_ERR
lydxml_subtree_get_snode(struct lyd_xml_ctx *lydctx, const struct lyd_node *parent, const char *prefix, size_t prefix_len,
const char *name, size_t name_len, const struct lysc_node **snode, struct lysc_ext_instance **ext)
{
LY_ERR r;
struct lyxml_ctx *xmlctx;
const struct ly_ctx *ctx;
const struct lyxml_ns *ns;
struct lys_module *mod;
uint32_t getnext_opts;
xmlctx = lydctx->xmlctx;
ctx = xmlctx->ctx;
getnext_opts = lydctx->int_opts & LYD_INTOPT_REPLY ? LYS_GETNEXT_OUTPUT : 0;
*snode = NULL;
*ext = NULL;
/* get current namespace */
ns = lyxml_ns_get(&xmlctx->ns, prefix, prefix_len);
if (!ns) {
if (lydctx->int_opts & LYD_INTOPT_ANY) {
goto unknown_module;
}
if (prefix_len) {
LOGVAL(ctx, LYVE_REFERENCE, "Unknown XML prefix \"%.*s\".", (int)prefix_len, prefix);
} else {
LOGVAL(ctx, LYVE_REFERENCE, "Missing XML namespace.");
}
return LY_EVALID;
}
/* get the element module, use parent context if possible because of extensions */
mod = ly_ctx_get_module_implemented_ns(parent ? LYD_CTX(parent) : ctx, ns->uri);
if (!mod) {
/* check for extension data */
r = ly_nested_ext_schema(parent, NULL, prefix, prefix_len, LY_VALUE_XML, &lydctx->xmlctx->ns, name, name_len,
snode, ext);
if (r != LY_ENOT) {
/* success or error */
return r;
}
unknown_module:
if (lydctx->parse_opts & LYD_PARSE_STRICT) {
LOGVAL(ctx, LYVE_REFERENCE, "No module with namespace \"%s\" in the context.", ns->uri);
return LY_EVALID;
}
return LY_SUCCESS;
}
/* get the schema node */
if (mod) {
if (!parent && lydctx->ext) {
*snode = lysc_ext_find_node(lydctx->ext, mod, name, name_len, 0, getnext_opts);
} else {
*snode = lys_find_child(parent ? parent->schema : NULL, mod, name, name_len, 0, getnext_opts);
}
if (!*snode) {
/* check for extension data */
r = ly_nested_ext_schema(parent, NULL, prefix, prefix_len, LY_VALUE_XML, &lydctx->xmlctx->ns, name,
name_len, snode, ext);
if (r != LY_ENOT) {
/* success or error */
return r;
}
/* unknown data node */
if (lydctx->parse_opts & LYD_PARSE_STRICT) {
if (parent) {
LOGVAL(ctx, LYVE_REFERENCE, "Node \"%.*s\" not found as a child of \"%s\" node.",
(int)name_len, name, LYD_NAME(parent));
} else if (lydctx->ext) {
if (lydctx->ext->argument) {
LOGVAL(ctx, LYVE_REFERENCE, "Node \"%.*s\" not found in the \"%s\" %s extension instance.",
(int)name_len, name, lydctx->ext->argument, lydctx->ext->def->name);
} else {
LOGVAL(ctx, LYVE_REFERENCE, "Node \"%.*s\" not found in the %s extension instance.",
(int)name_len, name, lydctx->ext->def->name);
}
} else {
LOGVAL(ctx, LYVE_REFERENCE, "Node \"%.*s\" not found in the \"%s\" module.",
(int)name_len, name, mod->name);
}
return LY_EVALID;
}
return LY_SUCCESS;
} else {
/* check that schema node is valid and can be used */
LY_CHECK_RET(lyd_parser_check_schema((struct lyd_ctx *)lydctx, *snode));
LY_CHECK_RET(lydxml_data_check_opaq(lydctx, snode));
}
}
return LY_SUCCESS;
}
/**
* @brief Parse an XML opque node.
*
* @param[in] lydctx XML YANG data parser context.
* @param[in] sibling Existing sibling node, if any.
* @param[in] prefix Parsed node prefix.
* @param[in] prefix_len Length of @p prefix.
* @param[in] name Parsed node name.
* @param[in] name_len Length of @p name.
* @param[out] insert_anchor Optional anchor node for inserting this node.
* @param[out] node Created node.
* @return LY_ERR value.
*/
static LY_ERR
lydxml_subtree_opaq(struct lyd_xml_ctx *lydctx, const struct lyd_node *sibling, const char *prefix, uint32_t prefix_len,
const char *name, uint32_t name_len, struct lyd_node **insert_anchor, struct lyd_node **node)
{
LY_ERR rc = LY_SUCCESS;
struct lyxml_ctx *xmlctx = lydctx->xmlctx;
const char *ns_uri;
const struct lyxml_ns *ns;
uint32_t hints;
void *val_prefix_data = NULL;
LY_VALUE_FORMAT format;
assert(lydctx->parse_opts & LYD_PARSE_OPAQ);
*node = NULL;
if (xmlctx->ws_only) {
/* ignore WS-only value */
if (xmlctx->dynamic) {
free((char *)xmlctx->value);
}
xmlctx->dynamic = 0;
xmlctx->value = "";
xmlctx->value_len = 0;
format = LY_VALUE_XML;
} else {
/* get value prefixes */
rc = ly_store_prefix_data(xmlctx->ctx, xmlctx->value, xmlctx->value_len, LY_VALUE_XML, &xmlctx->ns, &format,
&val_prefix_data);
LY_CHECK_GOTO(rc, cleanup);
}
/* get NS again, it may have been backed up and restored */
ns = lyxml_ns_get(&xmlctx->ns, prefix, prefix_len);
ns_uri = ns ? ns->uri : NULL;
/* get best-effort node hints */
lydxml_get_hints_opaq(name, name_len, xmlctx->value, xmlctx->value_len, sibling, ns_uri, &hints, insert_anchor);
/* create node */
rc = lyd_create_opaq(xmlctx->ctx, name, name_len, prefix, prefix_len, ns_uri, ns_uri ? strlen(ns_uri) : 0,
xmlctx->value, xmlctx->value_len, &xmlctx->dynamic, format, val_prefix_data, hints, node);
LY_CHECK_GOTO(rc, cleanup);
val_prefix_data = NULL;
/* parser next */
rc = lyxml_ctx_next(xmlctx);
LY_CHECK_GOTO(rc, cleanup);
/* process children */
while (xmlctx->status == LYXML_ELEMENT) {
rc = lydxml_subtree_r(lydctx, *node, lyd_node_child_p(*node), NULL);
LY_CHECK_GOTO(rc, cleanup);
}
cleanup:
ly_free_prefix_data(format, val_prefix_data);
if (rc) {
lyd_free_tree(*node);
*node = NULL;
}
return rc;
}
/**
* @brief Parse an XML leaf/leaf-list node.
*
* @param[in] lydctx XML YANG data parser context.
* @param[in] parent Parent node, if any.
* @param[in] snode Schema node of the new node.
* @param[out] node Created node.
* @return LY_ERR value.
*/
static LY_ERR
lydxml_subtree_term(struct lyd_xml_ctx *lydctx, struct lyd_node *parent, const struct lysc_node *snode,
struct lyd_node **node)
{
LY_ERR r, rc = LY_SUCCESS;
struct lyxml_ctx *xmlctx = lydctx->xmlctx;
struct lyd_node *anchor;
*node = NULL;
/* create node */
r = lyd_parser_create_term((struct lyd_ctx *)lydctx, snode, xmlctx->value, xmlctx->value_len, &xmlctx->dynamic,
LY_VALUE_XML, &xmlctx->ns, LYD_HINT_DATA, node);
LY_DPARSER_ERR_GOTO(r, rc = r, lydctx, cleanup);
if (*node) {
LOG_LOCSET(NULL, *node, NULL, NULL);
}
if (*node && parent && (snode->flags & LYS_KEY)) {
/* check the key order, the anchor must never be a key */
anchor = lyd_insert_get_next_anchor(lyd_child(parent), *node);
if (anchor && anchor->schema && (anchor->schema->flags & LYS_KEY)) {
if (lydctx->parse_opts & LYD_PARSE_STRICT) {
LOGVAL(xmlctx->ctx, LYVE_DATA, "Invalid position of the key \"%s\" in a list.", snode->name);
r = LY_EVALID;
LY_DPARSER_ERR_GOTO(r, rc = r, lydctx, cleanup);
} else {
LOGWRN(xmlctx->ctx, "Invalid position of the key \"%s\" in a list.", snode->name);
}
}
}
/* parser next */
r = lyxml_ctx_next(xmlctx);
LY_CHECK_ERR_GOTO(r, rc = r, cleanup);
/* no children expected */
if (xmlctx->status == LYXML_ELEMENT) {
LOGVAL(xmlctx->ctx, LYVE_SYNTAX, "Child element \"%.*s\" inside a terminal node \"%s\" found.",
(int)xmlctx->name_len, xmlctx->name, snode->name);
r = LY_EVALID;
LY_DPARSER_ERR_GOTO(r, rc = r, lydctx, cleanup);
}
cleanup:
if (*node) {
LOG_LOCBACK(0, 1, 0, 0);
}
if (rc && (!(lydctx->val_opts & LYD_VALIDATE_MULTI_ERROR) || (rc != LY_EVALID))) {
lyd_free_tree(*node);
*node = NULL;
}
return rc;
}
/**
* @brief Parse an XML inner node.
*
* @param[in] lydctx XML YANG data parser context.
* @param[in] snode Schema node of the new node.
* @param[in] ext Extension instance of @p snode, if any.
* @param[out] node Created node.
* @return LY_ERR value.
*/
static LY_ERR
lydxml_subtree_inner(struct lyd_xml_ctx *lydctx, const struct lysc_node *snode, const struct lysc_ext_instance *ext,
struct lyd_node **node)
{
LY_ERR r, rc = LY_SUCCESS;
struct lyxml_ctx *xmlctx = lydctx->xmlctx;
uint32_t prev_parse_opts = lydctx->parse_opts;
*node = NULL;
if (!xmlctx->ws_only) {
/* value in inner node */
LOGVAL(xmlctx->ctx, LYVE_SYNTAX, "Text value \"%.*s\" inside an inner node \"%s\" found.",
(int)xmlctx->value_len, xmlctx->value, snode->name);
r = LY_EVALID;
LY_DPARSER_ERR_GOTO(r, rc = r, lydctx, cleanup);
}
/* create node */
rc = lyd_create_inner(snode, node);
LY_CHECK_GOTO(rc, cleanup);
assert(*node);
LOG_LOCSET(NULL, *node, NULL, NULL);
/* parser next */
rc = lyxml_ctx_next(xmlctx);
LY_CHECK_GOTO(rc, cleanup);
if (ext) {
/* only parse these extension data and validate afterwards */
lydctx->parse_opts |= LYD_PARSE_ONLY;
}
/* process children */
while (xmlctx->status == LYXML_ELEMENT) {
r = lydxml_subtree_r(lydctx, *node, lyd_node_child_p(*node), NULL);
LY_DPARSER_ERR_GOTO(r, rc = r, lydctx, cleanup);
}
/* restore options */
lydctx->parse_opts = prev_parse_opts;
if (snode->nodetype == LYS_LIST) {
/* check all keys exist */
r = lyd_parse_check_keys(*node);
LY_CHECK_ERR_GOTO(r, rc = r, cleanup);
}
if (!(lydctx->parse_opts & LYD_PARSE_ONLY)) {
/* new node validation, autodelete CANNOT occur, all nodes are new */
r = lyd_validate_new(lyd_node_child_p(*node), snode, NULL, lydctx->val_opts, NULL);
LY_DPARSER_ERR_GOTO(r, rc = r, lydctx, cleanup);
/* add any missing default children */
r = lyd_new_implicit_r(*node, lyd_node_child_p(*node), NULL, NULL, &lydctx->node_when, &lydctx->node_types,
&lydctx->ext_node, (lydctx->val_opts & LYD_VALIDATE_NO_STATE) ? LYD_IMPLICIT_NO_STATE : 0, NULL);
LY_CHECK_ERR_GOTO(r, rc = r, cleanup);
}
if (snode->nodetype & (LYS_RPC | LYS_ACTION | LYS_NOTIF)) {
/* rememeber the RPC/action/notification */
lydctx->op_node = *node;
}
cleanup:
if (*node) {
LOG_LOCBACK(0, 1, 0, 0);
}
lydctx->parse_opts = prev_parse_opts;
if (rc && ((*node && !(*node)->hash) || !(lydctx->val_opts & LYD_VALIDATE_MULTI_ERROR) || (rc != LY_EVALID))) {
/* list without keys is unusable or an error */
lyd_free_tree(*node);
*node = NULL;
}
return rc;
}
/**
* @brief Parse an XML anyxml/anydata node.
*
* @param[in] lydctx XML YANG data parser context.
* @param[in] snode Schema node of the new node.
* @param[in] ext Extension instance of @p snode, if any.
* @param[out] node Created node.
* @return LY_ERR value.
*/
static LY_ERR
lydxml_subtree_any(struct lyd_xml_ctx *lydctx, const struct lysc_node *snode, const struct lysc_ext_instance *ext,
struct lyd_node **node)
{
LY_ERR r, rc = LY_SUCCESS;
struct lyxml_ctx *xmlctx = lydctx->xmlctx;
uint32_t prev_parse_opts = lydctx->parse_opts, prev_int_opts = lydctx->int_opts;
struct lyd_node *child = NULL;
char *val = NULL;
ly_bool log_node = 0;
*node = NULL;
if ((snode->nodetype == LYS_ANYDATA) && !xmlctx->ws_only) {
/* value in anydata node, we expect a tree */
LOGVAL(xmlctx->ctx, LYVE_SYNTAX, "Text value \"%.*s\" inside an anydata node \"%s\" found.",
(int)xmlctx->value_len < 20 ? xmlctx->value_len : 20, xmlctx->value, snode->name);
r = LY_EVALID;
LY_DPARSER_ERR_GOTO(r, rc = r, lydctx, cleanup);
}
if (!xmlctx->ws_only) {
/* use an arbitrary text value for anyxml */
val = strndup(xmlctx->value, xmlctx->value_len);
LY_CHECK_ERR_GOTO(!val, LOGMEM(xmlctx->ctx); rc = LY_EMEM, cleanup);
/* parser next */
r = lyxml_ctx_next(xmlctx);
LY_CHECK_ERR_GOTO(r, rc = r, cleanup);
/* create node */
r = lyd_create_any(snode, val, LYD_ANYDATA_STRING, 1, node);
LY_CHECK_ERR_GOTO(r, rc = r, cleanup);
val = NULL;
} else {
/* create node */
r = lyd_create_any(snode, NULL, LYD_ANYDATA_DATATREE, 1, node);
LY_CHECK_ERR_GOTO(r, rc = r, cleanup);
assert(*node);
LOG_LOCSET(NULL, *node, NULL, NULL);
log_node = 1;
/* parser next */
r = lyxml_ctx_next(xmlctx);
LY_CHECK_ERR_GOTO(r, rc = r, cleanup);
/* update options so that generic data can be parsed */
lydctx->parse_opts &= ~LYD_PARSE_STRICT;
lydctx->parse_opts |= LYD_PARSE_OPAQ | (ext ? LYD_PARSE_ONLY : 0);
lydctx->int_opts |= LYD_INTOPT_ANY | LYD_INTOPT_WITH_SIBLINGS;
/* parse any data tree */
while (xmlctx->status == LYXML_ELEMENT) {
r = lydxml_subtree_r(lydctx, NULL, &child, NULL);
LY_DPARSER_ERR_GOTO(r, rc = r, lydctx, cleanup);
}
/* assign the data tree */
((struct lyd_node_any *)*node)->value.tree = child;
child = NULL;
}
cleanup:
if (log_node) {
LOG_LOCBACK(0, 1, 0, 0);
}
lydctx->parse_opts = prev_parse_opts;
lydctx->int_opts = prev_int_opts;
free(val);
lyd_free_tree(child);
if (rc && (!(lydctx->val_opts & LYD_VALIDATE_MULTI_ERROR) || (rc != LY_EVALID))) {
lyd_free_tree(*node);
*node = NULL;
}
return rc;
}
/**
* @brief Parse an XML subtree, recursively.
*
* @param[in] lydctx XML YANG data parser context.
* @param[in,out] parent Parent node where the children are inserted. NULL in case of parsing top-level elements.
* @param[in,out] first_p Pointer to the first (@p parent or top-level) child.
* @param[in,out] parsed Optional set to add all the parsed siblings into.
* @return LY_ERR value.
*/
static LY_ERR
lydxml_subtree_r(struct lyd_xml_ctx *lydctx, struct lyd_node *parent, struct lyd_node **first_p, struct ly_set *parsed)
{
LY_ERR r, rc = LY_SUCCESS;
const char *prefix, *name;
size_t prefix_len, name_len;
struct lyxml_ctx *xmlctx;
const struct ly_ctx *ctx;
struct lyd_meta *meta = NULL;
struct lyd_attr *attr = NULL;
const struct lysc_node *snode;
struct lysc_ext_instance *ext;
uint32_t orig_parse_opts;
struct lyd_node *node = NULL, *insert_anchor = NULL;
ly_bool parse_subtree;
assert(parent || first_p);
xmlctx = lydctx->xmlctx;
ctx = xmlctx->ctx;
parse_subtree = lydctx->parse_opts & LYD_PARSE_SUBTREE ? 1 : 0;
/* all descendants should be parsed */
lydctx->parse_opts &= ~LYD_PARSE_SUBTREE;
orig_parse_opts = lydctx->parse_opts;
assert(xmlctx->status == LYXML_ELEMENT);
/* remember element prefix and name */
prefix = xmlctx->prefix;
prefix_len = xmlctx->prefix_len;
name = xmlctx->name;
name_len = xmlctx->name_len;
/* parser next */
rc = lyxml_ctx_next(xmlctx);
LY_CHECK_GOTO(rc, cleanup);
/* get the schema node */
r = lydxml_subtree_get_snode(lydctx, parent, prefix, prefix_len, name, name_len, &snode, &ext);
if (r) {
rc = r;
if ((r == LY_EVALID) && (lydctx->val_opts & LYD_VALIDATE_MULTI_ERROR)) {
/* skip the invalid data */
if ((r = lydxml_data_skip(xmlctx))) {
rc = r;
}
}
goto cleanup;
} else if (!snode && !(lydctx->parse_opts & LYD_PARSE_OPAQ)) {
LOGVRB("Skipping parsing of unknown node \"%.*s\".", name_len, name);
/* skip element with children */
rc = lydxml_data_skip(xmlctx);
goto cleanup;
}
/* create metadata/attributes */
if (xmlctx->status == LYXML_ATTRIBUTE) {
if (snode) {
rc = lydxml_metadata(lydctx, snode, &meta);
LY_CHECK_GOTO(rc, cleanup);
} else {
assert(lydctx->parse_opts & LYD_PARSE_OPAQ);
rc = lydxml_attrs(xmlctx, &attr);
LY_CHECK_GOTO(rc, cleanup);
}
}
assert(xmlctx->status == LYXML_ELEM_CONTENT);
if (!snode) {
/* opaque */
r = lydxml_subtree_opaq(lydctx, parent ? lyd_child(parent) : *first_p, prefix, prefix_len, name, name_len,
&insert_anchor, &node);
} else if (snode->nodetype & LYD_NODE_TERM) {
/* term */
r = lydxml_subtree_term(lydctx, parent, snode, &node);
} else if (snode->nodetype & LYD_NODE_INNER) {
/* inner */
r = lydxml_subtree_inner(lydctx, snode, ext, &node);
} else {
/* any */
assert(snode->nodetype & LYD_NODE_ANY);
r = lydxml_subtree_any(lydctx, snode, ext, &node);
}
LY_DPARSER_ERR_GOTO(r, rc = r, lydctx, cleanup);
if (node && snode) {
/* add/correct flags */
r = lyd_parse_set_data_flags(node, &meta, (struct lyd_ctx *)lydctx, ext);
LY_CHECK_ERR_GOTO(r, rc = r; lyd_free_tree(node), cleanup);
if (!(lydctx->parse_opts & LYD_PARSE_ONLY)) {
/* store for ext instance node validation, if needed */
r = lyd_validate_node_ext(node, &lydctx->ext_node);
LY_DPARSER_ERR_GOTO(r, rc = r, lydctx, cleanup);
}
}
/* parser next */
assert(xmlctx->status == LYXML_ELEM_CLOSE);
if (!parse_subtree) {
r = lyxml_ctx_next(xmlctx);
LY_CHECK_ERR_GOTO(r, rc = r; lyd_free_tree(node), cleanup);
}
LY_CHECK_GOTO(!node, cleanup);
/* add metadata/attributes */
if (snode) {
lyd_insert_meta(node, meta, 0);
meta = NULL;
} else {
lyd_insert_attr(node, attr);
attr = NULL;
}
/* insert, keep first pointer correct */
if (insert_anchor) {
lyd_insert_after(insert_anchor, node);
} else if (ext) {
r = lyplg_ext_insert(parent, node);
LY_CHECK_ERR_GOTO(r, rc = r; lyd_free_tree(node), cleanup);
} else {
lyd_insert_node(parent, first_p, node, lydctx->parse_opts & LYD_PARSE_ORDERED ? 1 : 0);
}
while (!parent && (*first_p)->prev->next) {
*first_p = (*first_p)->prev;
}
/* rememeber a successfully parsed node */
if (parsed) {
ly_set_add(parsed, node, 1, NULL);
}
cleanup:
lydctx->parse_opts = orig_parse_opts;
lyd_free_meta_siblings(meta);
lyd_free_attr_siblings(ctx, attr);
return rc;
}
/**
* @brief Parse a specific XML element into an opaque node.
*
* @param[in] xmlctx XML parser context.
* @param[in] name Name of the element.
* @param[in] uri URI of the element.
* @param[in] value Whether a value is expected in the element.
* @param[out] evnp Parsed envelope (opaque node).
* @return LY_SUCCESS on success.
* @return LY_ENOT if the specified element did not match.
* @return LY_ERR value on error.
*/
static LY_ERR
lydxml_envelope(struct lyxml_ctx *xmlctx, const char *name, const char *uri, ly_bool value, struct lyd_node **envp)
{
LY_ERR rc = LY_SUCCESS;
const struct lyxml_ns *ns;
struct lyd_attr *attr = NULL;
const char *prefix;
size_t prefix_len;
if (xmlctx->status != LYXML_ELEMENT) {
/* nothing to parse */
return LY_ENOT;
}
if (ly_strncmp(name, xmlctx->name, xmlctx->name_len)) {
/* not the expected element */
return LY_ENOT;
}
prefix = xmlctx->prefix;
prefix_len = xmlctx->prefix_len;
ns = lyxml_ns_get(&xmlctx->ns, prefix, prefix_len);
if (!ns) {
LOGVAL(xmlctx->ctx, LYVE_REFERENCE, "Unknown XML prefix \"%.*s\".", (int)prefix_len, prefix);
return LY_EVALID;
} else if (strcmp(ns->uri, uri)) {
/* different namespace */
return LY_ENOT;
}
LY_CHECK_RET(lyxml_ctx_next(xmlctx));
/* create attributes */
if (xmlctx->status == LYXML_ATTRIBUTE) {
LY_CHECK_RET(lydxml_attrs(xmlctx, &attr));
}
assert(xmlctx->status == LYXML_ELEM_CONTENT);
if (!value && !xmlctx->ws_only) {
LOGVAL(xmlctx->ctx, LYVE_SYNTAX, "Unexpected value \"%.*s\" in the \"%s\" element.",
(int)xmlctx->value_len, xmlctx->value, name);
rc = LY_EVALID;
goto cleanup;
}
/* create node */
rc = lyd_create_opaq(xmlctx->ctx, name, strlen(name), prefix, prefix_len, uri, strlen(uri), xmlctx->value,
xmlctx->ws_only ? 0 : xmlctx->value_len, NULL, LY_VALUE_XML, NULL, 0, envp);
LY_CHECK_GOTO(rc, cleanup);
/* assign atributes */
((struct lyd_node_opaq *)(*envp))->attr = attr;
attr = NULL;
/* parser next element */
LY_CHECK_GOTO(rc = lyxml_ctx_next(xmlctx), cleanup);
cleanup:
lyd_free_attr_siblings(xmlctx->ctx, attr);
if (rc) {
lyd_free_tree(*envp);
*envp = NULL;
}
return rc;
}
LY_ERR
lyd_parse_xml(const struct ly_ctx *ctx, const struct lysc_ext_instance *ext, struct lyd_node *parent,
struct lyd_node **first_p, struct ly_in *in, uint32_t parse_opts, uint32_t val_opts, uint32_t int_opts,
struct ly_set *parsed, ly_bool *subtree_sibling, struct lyd_ctx **lydctx_p)
{
LY_ERR r, rc = LY_SUCCESS;
struct lyd_xml_ctx *lydctx;
ly_bool parsed_data_nodes = 0, close_elem = 0;
struct lyd_node *act = NULL;
enum LYXML_PARSER_STATUS status;
assert(ctx && in && lydctx_p);
assert(!(parse_opts & ~LYD_PARSE_OPTS_MASK));
assert(!(val_opts & ~LYD_VALIDATE_OPTS_MASK));
/* init context */
lydctx = calloc(1, sizeof *lydctx);
LY_CHECK_ERR_RET(!lydctx, LOGMEM(ctx), LY_EMEM);
LY_CHECK_GOTO(rc = lyxml_ctx_new(ctx, in, &lydctx->xmlctx), cleanup);
lydctx->parse_opts = parse_opts;
lydctx->val_opts = val_opts;
lydctx->int_opts = int_opts;
lydctx->free = lyd_xml_ctx_free;
lydctx->ext = ext;
/* find the operation node if it exists already */
LY_CHECK_GOTO(rc = lyd_parser_find_operation(parent, int_opts, &lydctx->op_node), cleanup);
if ((int_opts & LYD_INTOPT_RPC) && (int_opts & LYD_INTOPT_ACTION)) {
/* can be either, try to parse "action" */
if (!lydxml_envelope(lydctx->xmlctx, "action", "urn:ietf:params:xml:ns:yang:1", 0, &act)) {
close_elem = 1;
int_opts &= ~LYD_INTOPT_RPC;
}
}
/* parse XML data */
while (lydctx->xmlctx->status == LYXML_ELEMENT) {
r = lydxml_subtree_r(lydctx, parent, first_p, parsed);
LY_DPARSER_ERR_GOTO(r, rc = r, lydctx, cleanup);
parsed_data_nodes = 1;
if (!(int_opts & LYD_INTOPT_WITH_SIBLINGS)) {
break;
}
}
/* close an opened element */
if (close_elem) {
if (lydctx->xmlctx->status != LYXML_ELEM_CLOSE) {
assert(lydctx->xmlctx->status == LYXML_ELEMENT);
LOGVAL(lydctx->xmlctx->ctx, LYVE_SYNTAX, "Unexpected child element \"%.*s\".",
(int)lydctx->xmlctx->name_len, lydctx->xmlctx->name);
rc = LY_EVALID;
goto cleanup;
}
LY_CHECK_GOTO(rc = lyxml_ctx_next(lydctx->xmlctx), cleanup);
}
/* check final state */
if ((int_opts & LYD_INTOPT_NO_SIBLINGS) && (lydctx->xmlctx->status == LYXML_ELEMENT)) {
LOGVAL(ctx, LYVE_SYNTAX, "Unexpected sibling node.");
r = LY_EVALID;
LY_DPARSER_ERR_GOTO(r, rc = r, lydctx, cleanup);
}
if ((int_opts & (LYD_INTOPT_RPC | LYD_INTOPT_ACTION | LYD_INTOPT_NOTIF | LYD_INTOPT_REPLY)) && !lydctx->op_node) {
LOGVAL(ctx, LYVE_DATA, "Missing the operation node.");
r = LY_EVALID;
LY_DPARSER_ERR_GOTO(r, rc = r, lydctx, cleanup);
}
if (!parsed_data_nodes) {
/* no data nodes were parsed */
lydctx->op_node = NULL;
}
if (parse_opts & LYD_PARSE_SUBTREE) {
/* check for a sibling element */
assert(subtree_sibling);
if (!lyxml_ctx_peek(lydctx->xmlctx, &status) && (status == LYXML_ELEMENT)) {
*subtree_sibling = 1;
} else {
*subtree_sibling = 0;
}
}
cleanup:
/* there should be no unres stored if validation should be skipped */
assert(!(parse_opts & LYD_PARSE_ONLY) || (!lydctx->node_types.count && !lydctx->meta_types.count &&
!lydctx->node_when.count));
lyd_free_tree(act);
if (rc && (!(lydctx->val_opts & LYD_VALIDATE_MULTI_ERROR) || (rc != LY_EVALID))) {
lyd_xml_ctx_free((struct lyd_ctx *)lydctx);
} else {
*lydctx_p = (struct lyd_ctx *)lydctx;
/* the XML context is no more needed, freeing it also stops logging line numbers which would be confusing now */
lyxml_ctx_free(lydctx->xmlctx);
lydctx->xmlctx = NULL;
}
return rc;
}
/**
* @brief Parse all expected non-data XML elements of a NETCONF rpc message.
*
* @param[in] xmlctx XML parser context.
* @param[out] evnp Parsed envelope(s) (opaque node).
* @param[out] int_opts Internal options for parsing the rest of YANG data.
* @param[out] close_elem Number of parsed opened elements that need to be closed.
* @return LY_SUCCESS on success.
* @return LY_ERR value on error.
*/
static LY_ERR
lydxml_env_netconf_rpc(struct lyxml_ctx *xmlctx, struct lyd_node **envp, uint32_t *int_opts, uint32_t *close_elem)
{
LY_ERR rc = LY_SUCCESS, r;
struct lyd_node *child;
assert(envp && !*envp);
/* parse "rpc" */
r = lydxml_envelope(xmlctx, "rpc", "urn:ietf:params:xml:ns:netconf:base:1.0", 0, envp);
LY_CHECK_ERR_GOTO(r, rc = r, cleanup);
/* parse "action", if any */
r = lydxml_envelope(xmlctx, "action", "urn:ietf:params:xml:ns:yang:1", 0, &child);
if (r == LY_SUCCESS) {
/* insert */
lyd_insert_node(*envp, NULL, child, 0);
/* NETCONF action */
*int_opts = LYD_INTOPT_NO_SIBLINGS | LYD_INTOPT_ACTION;
*close_elem = 2;
} else if (r == LY_ENOT) {
/* NETCONF RPC */
*int_opts = LYD_INTOPT_NO_SIBLINGS | LYD_INTOPT_RPC;
*close_elem = 1;
} else {
rc = r;
goto cleanup;
}
cleanup:
if (rc) {
lyd_free_tree(*envp);
*envp = NULL;
}
return rc;
}
/**
* @brief Parse all expected non-data XML elements of a NETCONF notification message.
*
* @param[in] xmlctx XML parser context.
* @param[out] evnp Parsed envelope(s) (opaque node).
* @param[out] int_opts Internal options for parsing the rest of YANG data.
* @param[out] close_elem Number of parsed opened elements that need to be closed.
* @return LY_SUCCESS on success.
* @return LY_ERR value on error.
*/
static LY_ERR
lydxml_env_netconf_notif(struct lyxml_ctx *xmlctx, struct lyd_node **envp, uint32_t *int_opts, uint32_t *close_elem)
{
LY_ERR rc = LY_SUCCESS, r;
struct lyd_node *child;
assert(envp && !*envp);
/* parse "notification" */
r = lydxml_envelope(xmlctx, "notification", "urn:ietf:params:xml:ns:netconf:notification:1.0", 0, envp);
LY_CHECK_ERR_GOTO(r, rc = r, cleanup);
/* parse "eventTime" */
r = lydxml_envelope(xmlctx, "eventTime", "urn:ietf:params:xml:ns:netconf:notification:1.0", 1, &child);
if (r == LY_ENOT) {
LOGVAL(xmlctx->ctx, LYVE_REFERENCE, "Unexpected element \"%.*s\" instead of \"eventTime\".",
(int)xmlctx->name_len, xmlctx->name);
r = LY_EVALID;
}
LY_CHECK_ERR_GOTO(r, rc = r, cleanup);
/* insert */
lyd_insert_node(*envp, NULL, child, 0);
/* validate value */
r = lyd_parser_notif_eventtime_validate(child);
LY_CHECK_ERR_GOTO(r, rc = r, cleanup);
/* finish child parsing */
if (xmlctx->status != LYXML_ELEM_CLOSE) {
assert(xmlctx->status == LYXML_ELEMENT);
LOGVAL(xmlctx->ctx, LYVE_SYNTAX, "Unexpected child element \"%.*s\" of \"eventTime\".",
(int)xmlctx->name_len, xmlctx->name);
rc = LY_EVALID;
goto cleanup;
}
LY_CHECK_GOTO(rc = lyxml_ctx_next(xmlctx), cleanup);
/* NETCONF notification */
*int_opts = LYD_INTOPT_NO_SIBLINGS | LYD_INTOPT_NOTIF;
*close_elem = 1;
cleanup:
if (rc) {
lyd_free_tree(*envp);
*envp = NULL;
}
return rc;
}
/**
* @brief Parse an XML element as an opaque node subtree.
*
* @param[in] xmlctx XML parser context.
* @param[in] parent Parent to append nodes to.
* @return LY_ERR value.
*/
static LY_ERR
lydxml_opaq_r(struct lyxml_ctx *xmlctx, struct lyd_node *parent)
{
LY_ERR rc = LY_SUCCESS;
const struct lyxml_ns *ns;
struct lyd_attr *attr = NULL;
struct lyd_node *child = NULL;
const char *name, *prefix;
size_t name_len, prefix_len;
assert(xmlctx->status == LYXML_ELEMENT);
name = xmlctx->name;
name_len = xmlctx->name_len;
prefix = xmlctx->prefix;
prefix_len = xmlctx->prefix_len;
ns = lyxml_ns_get(&xmlctx->ns, prefix, prefix_len);
if (!ns) {
LOGVAL(xmlctx->ctx, LYVE_REFERENCE, "Unknown XML prefix \"%.*s\".", (int)prefix_len, prefix);
return LY_EVALID;
}
LY_CHECK_RET(lyxml_ctx_next(xmlctx));
/* create attributes */
if (xmlctx->status == LYXML_ATTRIBUTE) {
LY_CHECK_RET(lydxml_attrs(xmlctx, &attr));
}
/* create node */
assert(xmlctx->status == LYXML_ELEM_CONTENT);
rc = lyd_create_opaq(xmlctx->ctx, name, name_len, prefix, prefix_len, ns->uri, strlen(ns->uri), xmlctx->value,
xmlctx->ws_only ? 0 : xmlctx->value_len, NULL, LY_VALUE_XML, NULL, 0, &child);
LY_CHECK_GOTO(rc, cleanup);
/* assign atributes */
((struct lyd_node_opaq *)child)->attr = attr;
attr = NULL;
/* parser next element */
LY_CHECK_GOTO(rc = lyxml_ctx_next(xmlctx), cleanup);
/* parse all the descendants */
while (xmlctx->status == LYXML_ELEMENT) {
rc = lydxml_opaq_r(xmlctx, child);
LY_CHECK_GOTO(rc, cleanup);
}
/* insert */
lyd_insert_node(parent, NULL, child, 1);
cleanup:
lyd_free_attr_siblings(xmlctx->ctx, attr);
if (rc) {
lyd_free_tree(child);
}
return rc;
}
/**
* @brief Parse all expected non-data XML elements of the error-info element in NETCONF rpc-reply message.
*
* @param[in] xmlctx XML parser context.
* @param[in] parent Parent to append nodes to.
* @return LY_ERR value.
*/
static LY_ERR
lydxml_env_netconf_rpc_reply_error_info(struct lyxml_ctx *xmlctx, struct lyd_node *parent)
{
LY_ERR r;
struct lyd_node *child, *iter;
ly_bool no_dup;
/* there must be some child */
if (xmlctx->status == LYXML_ELEM_CLOSE) {
LOGVAL(xmlctx->ctx, LYVE_SYNTAX, "Missing child elements of \"error-info\".");
return LY_EVALID;
}
while (xmlctx->status == LYXML_ELEMENT) {
child = NULL;
/*
* session-id
*/
r = lydxml_envelope(xmlctx, "session-id", "urn:ietf:params:xml:ns:netconf:base:1.0", 1, &child);
if (r == LY_SUCCESS) {
no_dup = 1;
goto check_child;
} else if (r != LY_ENOT) {
goto error;
}
/*
* bad-attribute
*/
r = lydxml_envelope(xmlctx, "bad-attribute", "urn:ietf:params:xml:ns:netconf:base:1.0", 1, &child);
if (r == LY_SUCCESS) {
no_dup = 1;
goto check_child;
} else if (r != LY_ENOT) {
goto error;
}
/*
* bad-element
*/
r = lydxml_envelope(xmlctx, "bad-element", "urn:ietf:params:xml:ns:netconf:base:1.0", 1, &child);
if (r == LY_SUCCESS) {
no_dup = 1;
goto check_child;
} else if (r != LY_ENOT) {
goto error;
}
/*
* bad-namespace
*/
r = lydxml_envelope(xmlctx, "bad-namespace", "urn:ietf:params:xml:ns:netconf:base:1.0", 1, &child);
if (r == LY_SUCCESS) {
no_dup = 1;
goto check_child;
} else if (r != LY_ENOT) {
goto error;
}
if (r == LY_ENOT) {
assert(xmlctx->status == LYXML_ELEMENT);
/* custom elements, parse all the siblings */
while (xmlctx->status == LYXML_ELEMENT) {
LY_CHECK_GOTO(r = lydxml_opaq_r(xmlctx, parent), error);
LY_CHECK_GOTO(r = lyxml_ctx_next(xmlctx), error);
}
continue;
}
check_child:
/* check for duplicates */
if (no_dup) {
LY_LIST_FOR(lyd_child(parent), iter) {
if ((((struct lyd_node_opaq *)iter)->name.name == ((struct lyd_node_opaq *)child)->name.name) &&
(((struct lyd_node_opaq *)iter)->name.module_ns == ((struct lyd_node_opaq *)child)->name.module_ns)) {
LOGVAL(xmlctx->ctx, LYVE_REFERENCE, "Duplicate element \"%s\" in \"error-info\".",
((struct lyd_node_opaq *)child)->name.name);
r = LY_EVALID;
goto error;
}
}
}
/* finish child parsing */
if (xmlctx->status != LYXML_ELEM_CLOSE) {
assert(xmlctx->status == LYXML_ELEMENT);
LOGVAL(xmlctx->ctx, LYVE_SYNTAX, "Unexpected child element \"%.*s\" of \"error-info\".",
(int)xmlctx->name_len, xmlctx->name);
r = LY_EVALID;
goto error;
}
LY_CHECK_GOTO(r = lyxml_ctx_next(xmlctx), error);
/* insert */
lyd_insert_node(parent, NULL, child, 1);
}
return LY_SUCCESS;
error:
lyd_free_tree(child);
return r;
}
/**
* @brief Parse all expected non-data XML elements of the rpc-error element in NETCONF rpc-reply message.
*
* @param[in] xmlctx XML parser context.
* @param[in] parent Parent to append nodes to.
* @return LY_ERR value.
*/
static LY_ERR
lydxml_env_netconf_rpc_reply_error(struct lyxml_ctx *xmlctx, struct lyd_node *parent)
{
LY_ERR r;
struct lyd_node *child, *iter;
const char *val;
ly_bool no_dup;
/* there must be some child */
if (xmlctx->status == LYXML_ELEM_CLOSE) {
LOGVAL(xmlctx->ctx, LYVE_SYNTAX, "Missing child elements of \"rpc-error\".");
return LY_EVALID;
}
while (xmlctx->status == LYXML_ELEMENT) {
child = NULL;
/*
* error-type
*/
r = lydxml_envelope(xmlctx, "error-type", "urn:ietf:params:xml:ns:netconf:base:1.0", 1, &child);
if (r == LY_SUCCESS) {
val = ((struct lyd_node_opaq *)child)->value;
if (strcmp(val, "transport") && strcmp(val, "rpc") && strcmp(val, "protocol") && strcmp(val, "application")) {
LOGVAL(xmlctx->ctx, LYVE_REFERENCE, "Invalid value \"%s\" of element \"%s\".", val,
((struct lyd_node_opaq *)child)->name.name);
r = LY_EVALID;
goto error;
}
no_dup = 1;
goto check_child;
} else if (r != LY_ENOT) {
goto error;
}
/*
* error-tag
*/
r = lydxml_envelope(xmlctx, "error-tag", "urn:ietf:params:xml:ns:netconf:base:1.0", 1, &child);
if (r == LY_SUCCESS) {
val = ((struct lyd_node_opaq *)child)->value;
if (strcmp(val, "in-use") && strcmp(val, "invalid-value") && strcmp(val, "too-big") &&
strcmp(val, "missing-attribute") && strcmp(val, "bad-attribute") &&
strcmp(val, "unknown-attribute") && strcmp(val, "missing-element") && strcmp(val, "bad-element") &&
strcmp(val, "unknown-element") && strcmp(val, "unknown-namespace") && strcmp(val, "access-denied") &&
strcmp(val, "lock-denied") && strcmp(val, "resource-denied") && strcmp(val, "rollback-failed") &&
strcmp(val, "data-exists") && strcmp(val, "data-missing") && strcmp(val, "operation-not-supported") &&
strcmp(val, "operation-failed") && strcmp(val, "malformed-message")) {
LOGVAL(xmlctx->ctx, LYVE_REFERENCE, "Invalid value \"%s\" of element \"%s\".", val,
((struct lyd_node_opaq *)child)->name.name);
r = LY_EVALID;
goto error;
}
no_dup = 1;
goto check_child;
} else if (r != LY_ENOT) {
goto error;
}
/*
* error-severity
*/
r = lydxml_envelope(xmlctx, "error-severity", "urn:ietf:params:xml:ns:netconf:base:1.0", 1, &child);
if (r == LY_SUCCESS) {
val = ((struct lyd_node_opaq *)child)->value;
if (strcmp(val, "error") && strcmp(val, "warning")) {
LOGVAL(xmlctx->ctx, LYVE_REFERENCE, "Invalid value \"%s\" of element \"%s\".", val,
((struct lyd_node_opaq *)child)->name.name);
r = LY_EVALID;
goto error;
}
no_dup = 1;
goto check_child;
} else if (r != LY_ENOT) {
goto error;
}
/*
* error-app-tag
*/
r = lydxml_envelope(xmlctx, "error-app-tag", "urn:ietf:params:xml:ns:netconf:base:1.0", 1, &child);
if (r == LY_SUCCESS) {
no_dup = 1;
goto check_child;
} else if (r != LY_ENOT) {
goto error;
}
/*
* error-path
*/
r = lydxml_envelope(xmlctx, "error-path", "urn:ietf:params:xml:ns:netconf:base:1.0", 1, &child);
if (r == LY_SUCCESS) {
no_dup = 1;
goto check_child;
} else if (r != LY_ENOT) {
goto error;
}
/*
* error-message
*/
r = lydxml_envelope(xmlctx, "error-message", "urn:ietf:params:xml:ns:netconf:base:1.0", 1, &child);
if (r == LY_SUCCESS) {
no_dup = 1;
goto check_child;
} else if (r != LY_ENOT) {
goto error;
}
/* error-info */
r = lydxml_envelope(xmlctx, "error-info", "urn:ietf:params:xml:ns:netconf:base:1.0", 0, &child);
if (r == LY_SUCCESS) {
/* parse all the descendants */
LY_CHECK_GOTO(r = lydxml_env_netconf_rpc_reply_error_info(xmlctx, child), error);
no_dup = 0;
goto check_child;
} else if (r != LY_ENOT) {
goto error;
}
if (r == LY_ENOT) {
assert(xmlctx->status == LYXML_ELEMENT);
LOGVAL(xmlctx->ctx, LYVE_SYNTAX, "Unexpected child element \"%.*s\" of \"rpc-error\".",
(int)xmlctx->name_len, xmlctx->name);
r = LY_EVALID;
goto error;
}
check_child:
/* check for duplicates */
if (no_dup) {
LY_LIST_FOR(lyd_child(parent), iter) {
if ((((struct lyd_node_opaq *)iter)->name.name == ((struct lyd_node_opaq *)child)->name.name) &&
(((struct lyd_node_opaq *)iter)->name.module_ns == ((struct lyd_node_opaq *)child)->name.module_ns)) {
LOGVAL(xmlctx->ctx, LYVE_REFERENCE, "Duplicate element \"%s\" in \"rpc-error\".",
((struct lyd_node_opaq *)child)->name.name);
r = LY_EVALID;
goto error;
}
}
}
/* finish child parsing */
if (xmlctx->status != LYXML_ELEM_CLOSE) {
assert(xmlctx->status == LYXML_ELEMENT);
LOGVAL(xmlctx->ctx, LYVE_SYNTAX, "Unexpected child element \"%.*s\" of \"rpc-error\".",
(int)xmlctx->name_len, xmlctx->name);
r = LY_EVALID;
goto error;
}
LY_CHECK_GOTO(r = lyxml_ctx_next(xmlctx), error);
/* insert */
lyd_insert_node(parent, NULL, child, 1);
}
return LY_SUCCESS;
error:
lyd_free_tree(child);
return r;
}
/**
* @brief Parse all expected non-data XML elements of a NETCONF rpc-reply message.
*
* @param[in] xmlctx XML parser context.
* @param[out] evnp Parsed envelope(s) (opaque node).
* @param[out] int_opts Internal options for parsing the rest of YANG data.
* @param[out] close_elem Number of parsed opened elements that need to be closed.
* @return LY_SUCCESS on success.
* @return LY_ERR value on error.
*/
static LY_ERR
lydxml_env_netconf_reply(struct lyxml_ctx *xmlctx, struct lyd_node **envp, uint32_t *int_opts, uint32_t *close_elem)
{
LY_ERR rc = LY_SUCCESS, r;
struct lyd_node *child = NULL;
const char *parsed_elem = NULL;
assert(envp && !*envp);
/* parse "rpc-reply" */
r = lydxml_envelope(xmlctx, "rpc-reply", "urn:ietf:params:xml:ns:netconf:base:1.0", 0, envp);
LY_CHECK_ERR_GOTO(r, rc = r, cleanup);
/* there must be some child */
if (xmlctx->status == LYXML_ELEM_CLOSE) {
LOGVAL(xmlctx->ctx, LYVE_SYNTAX, "Missing child elements of \"rpc-reply\".");
rc = LY_EVALID;
goto cleanup;
}
/* try to parse "ok" */
r = lydxml_envelope(xmlctx, "ok", "urn:ietf:params:xml:ns:netconf:base:1.0", 0, &child);
if (r == LY_SUCCESS) {
/* insert */
lyd_insert_node(*envp, NULL, child, 1);
/* finish child parsing */
if (xmlctx->status != LYXML_ELEM_CLOSE) {
assert(xmlctx->status == LYXML_ELEMENT);
LOGVAL(xmlctx->ctx, LYVE_SYNTAX, "Unexpected child element \"%.*s\" of \"ok\".",
(int)xmlctx->name_len, xmlctx->name);
rc = LY_EVALID;
goto cleanup;
}
LY_CHECK_GOTO(rc = lyxml_ctx_next(xmlctx), cleanup);
/* success */
parsed_elem = "ok";
goto finish;
} else if (r != LY_ENOT) {
rc = r;
goto cleanup;
}
/* try to parse all "rpc-error" elements */
while (xmlctx->status == LYXML_ELEMENT) {
r = lydxml_envelope(xmlctx, "rpc-error", "urn:ietf:params:xml:ns:netconf:base:1.0", 0, &child);
if (r == LY_ENOT) {
break;
} else if (r) {
rc = r;
goto cleanup;
}
/* insert */
lyd_insert_node(*envp, NULL, child, 1);
/* parse all children of "rpc-error" */
LY_CHECK_GOTO(rc = lydxml_env_netconf_rpc_reply_error(xmlctx, child), cleanup);
/* finish child parsing */
assert(xmlctx->status == LYXML_ELEM_CLOSE);
LY_CHECK_GOTO(rc = lyxml_ctx_next(xmlctx), cleanup);
parsed_elem = "rpc-error";
}
finish:
if (parsed_elem) {
/* NETCONF rpc-reply with no data */
if (xmlctx->status != LYXML_ELEM_CLOSE) {
assert(xmlctx->status == LYXML_ELEMENT);
LOGVAL(xmlctx->ctx, LYVE_SYNTAX, "Unexpected sibling element \"%.*s\" of \"%s\".",
(int)xmlctx->name_len, xmlctx->name, parsed_elem);
rc = LY_EVALID;
goto cleanup;
}
}
/* NETCONF rpc-reply */
*int_opts = LYD_INTOPT_WITH_SIBLINGS | LYD_INTOPT_REPLY;
*close_elem = 1;
cleanup:
if (rc) {
lyd_free_tree(*envp);
*envp = NULL;
}
return rc;
}
LY_ERR
lyd_parse_xml_netconf(const struct ly_ctx *ctx, const struct lysc_ext_instance *ext, struct lyd_node *parent,
struct lyd_node **first_p, struct ly_in *in, uint32_t parse_opts, uint32_t val_opts, enum lyd_type data_type,
struct lyd_node **envp, struct ly_set *parsed, struct lyd_ctx **lydctx_p)
{
LY_ERR rc = LY_SUCCESS;
struct lyd_xml_ctx *lydctx;
uint32_t i, int_opts = 0, close_elem = 0;
ly_bool parsed_data_nodes = 0;
assert(ctx && in && lydctx_p);
assert(!(parse_opts & ~LYD_PARSE_OPTS_MASK));
assert(!(val_opts & ~LYD_VALIDATE_OPTS_MASK));
assert(!(parse_opts & LYD_PARSE_SUBTREE));
/* init context */
lydctx = calloc(1, sizeof *lydctx);
LY_CHECK_ERR_RET(!lydctx, LOGMEM(ctx), LY_EMEM);
LY_CHECK_GOTO(rc = lyxml_ctx_new(ctx, in, &lydctx->xmlctx), cleanup);
lydctx->parse_opts = parse_opts;
lydctx->val_opts = val_opts;
lydctx->free = lyd_xml_ctx_free;
lydctx->ext = ext;
switch (data_type) {
case LYD_TYPE_RPC_NETCONF:
assert(!parent);
rc = lydxml_env_netconf_rpc(lydctx->xmlctx, envp, &int_opts, &close_elem);
if (rc == LY_ENOT) {
LOGVAL(ctx, LYVE_DATA, "Missing NETCONF <rpc> envelope or in incorrect namespace.");
}
LY_CHECK_GOTO(rc, cleanup);
break;
case LYD_TYPE_NOTIF_NETCONF:
assert(!parent);
rc = lydxml_env_netconf_notif(lydctx->xmlctx, envp, &int_opts, &close_elem);
if (rc == LY_ENOT) {
LOGVAL(ctx, LYVE_DATA, "Missing NETCONF <notification> envelope or in incorrect namespace.");
}
LY_CHECK_GOTO(rc, cleanup);
break;
case LYD_TYPE_REPLY_NETCONF:
assert(parent);
rc = lydxml_env_netconf_reply(lydctx->xmlctx, envp, &int_opts, &close_elem);
if (rc == LY_ENOT) {
LOGVAL(ctx, LYVE_DATA, "Missing NETCONF <rpc-reply> envelope or in incorrect namespace.");
}
LY_CHECK_GOTO(rc, cleanup);
break;
case LYD_TYPE_RPC_RESTCONF:
assert(parent);
/* parse "input" */
rc = lydxml_envelope(lydctx->xmlctx, "input", lyd_owner_module(parent)->ns, 0, envp);
if (rc == LY_ENOT) {
LOGVAL(ctx, LYVE_DATA, "Missing RESTCONF \"input\" object or in incorrect namespace.");
}
LY_CHECK_GOTO(rc, cleanup);
int_opts = LYD_INTOPT_WITH_SIBLINGS | LYD_INTOPT_RPC | LYD_INTOPT_ACTION;
close_elem = 1;
break;
case LYD_TYPE_REPLY_RESTCONF:
assert(parent);
/* parse "output" */
rc = lydxml_envelope(lydctx->xmlctx, "output", lyd_owner_module(parent)->ns, 0, envp);
if (rc == LY_ENOT) {
LOGVAL(ctx, LYVE_DATA, "Missing RESTCONF \"output\" object or in incorrect namespace.");
}
LY_CHECK_GOTO(rc, cleanup);
int_opts = LYD_INTOPT_WITH_SIBLINGS | LYD_INTOPT_REPLY;
close_elem = 1;
break;
default:
LOGINT(ctx);
rc = LY_EINT;
goto cleanup;
}
lydctx->int_opts = int_opts;
/* find the operation node if it exists already */
LY_CHECK_GOTO(rc = lyd_parser_find_operation(parent, int_opts, &lydctx->op_node), cleanup);
/* parse XML data */
while (lydctx->xmlctx->status == LYXML_ELEMENT) {
LY_CHECK_GOTO(rc = lydxml_subtree_r(lydctx, parent, first_p, parsed), cleanup);
parsed_data_nodes = 1;
if (!(int_opts & LYD_INTOPT_WITH_SIBLINGS)) {
break;
}
}
/* close all opened elements */
for (i = 0; i < close_elem; ++i) {
if (lydctx->xmlctx->status != LYXML_ELEM_CLOSE) {
assert(lydctx->xmlctx->status == LYXML_ELEMENT);
LOGVAL(lydctx->xmlctx->ctx, LYVE_SYNTAX, "Unexpected child element \"%.*s\".",
(int)lydctx->xmlctx->name_len, lydctx->xmlctx->name);
rc = LY_EVALID;
goto cleanup;
}
LY_CHECK_GOTO(rc = lyxml_ctx_next(lydctx->xmlctx), cleanup);
}
/* check final state */
if ((int_opts & LYD_INTOPT_NO_SIBLINGS) && (lydctx->xmlctx->status == LYXML_ELEMENT)) {
LOGVAL(ctx, LYVE_SYNTAX, "Unexpected sibling node.");
rc = LY_EVALID;
goto cleanup;
}
if ((int_opts & (LYD_INTOPT_RPC | LYD_INTOPT_ACTION | LYD_INTOPT_NOTIF | LYD_INTOPT_REPLY)) && !lydctx->op_node) {
LOGVAL(ctx, LYVE_DATA, "Missing the operation node.");
rc = LY_EVALID;
goto cleanup;
}
if (!parsed_data_nodes) {
/* no data nodes were parsed */
lydctx->op_node = NULL;
}
cleanup:
/* there should be no unres stored if validation should be skipped */
assert(!(parse_opts & LYD_PARSE_ONLY) || (!lydctx->node_types.count && !lydctx->meta_types.count &&
!lydctx->node_when.count));
if (rc) {
lyd_xml_ctx_free((struct lyd_ctx *)lydctx);
} else {
*lydctx_p = (struct lyd_ctx *)lydctx;
/* the XML context is no more needed, freeing it also stops logging line numbers which would be confusing now */
lyxml_ctx_free(lydctx->xmlctx);
lydctx->xmlctx = NULL;
}
return rc;
}