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/**
* @file ipv4_address_no_zone.c
* @author Michal Vasko <mvasko@cesnet.cz>
* @brief ietf-inet-types ipv4-address-no-zone type plugin.
*
* Copyright (c) 2019-2021 CESNET, z.s.p.o.
*
* This source code is licensed under BSD 3-Clause License (the "License").
* You may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://opensource.org/licenses/BSD-3-Clause
*/
#define _GNU_SOURCE /* strndup */
#include "plugins_types.h"
#ifdef _WIN32
# include <winsock2.h>
# include <ws2tcpip.h>
#else
# include <arpa/inet.h>
# if defined (__FreeBSD__) || defined (__NetBSD__) || defined (__OpenBSD__)
# include <netinet/in.h>
# include <sys/socket.h>
# endif
#endif
#include <errno.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include "libyang.h"
#include "common.h"
#include "compat.h"
/**
* @page howtoDataLYB LYB Binary Format
* @subsection howtoDataLYBTypesIPv4AddressNoZone ipv4-address-no-zone (ietf-inet-types)
*
* | Size (B) | Mandatory | Type | Meaning |
* | :------ | :-------: | :--: | :-----: |
* | 4 | yes | `struct in_addr *` | IPv4 address in network-byte order |
*/
/**
* @brief Implementation of ::lyplg_type_store_clb for the ipv4-address-no-zone ietf-inet-types type.
*/
static LY_ERR
lyplg_type_store_ipv4_address_no_zone(const struct ly_ctx *ctx, const struct lysc_type *type, const void *value,
size_t value_len, uint32_t options, LY_VALUE_FORMAT format, void *UNUSED(prefix_data), uint32_t hints,
const struct lysc_node *UNUSED(ctx_node), struct lyd_value *storage, struct lys_glob_unres *UNUSED(unres),
struct ly_err_item **err)
{
LY_ERR ret = LY_SUCCESS;
struct lysc_type_str *type_str = (struct lysc_type_str *)type;
struct lyd_value_ipv4_address_no_zone *val;
/* init storage */
memset(storage, 0, sizeof *storage);
LYPLG_TYPE_VAL_INLINE_PREPARE(storage, val);
LY_CHECK_ERR_GOTO(!val, ret = LY_EMEM, cleanup);
storage->realtype = type;
if (format == LY_VALUE_LYB) {
/* validation */
if (value_len != 4) {
ret = ly_err_new(err, LY_EVALID, LYVE_DATA, NULL, NULL, "Invalid LYB ipv4-address-no-zone value size %zu "
"(expected 4).", value_len);
goto cleanup;
}
/* store IP address */
memcpy(&val->addr, value, 4);
/* success */
goto cleanup;
}
/* check hints */
ret = lyplg_type_check_hints(hints, value, value_len, type->basetype, NULL, err);
LY_CHECK_GOTO(ret, cleanup);
/* length restriction of the string */
if (type_str->length) {
/* value_len is in bytes, but we need number of characters here */
ret = lyplg_type_validate_range(LY_TYPE_STRING, type_str->length, ly_utf8len(value, value_len), value, value_len, err);
LY_CHECK_GOTO(ret, cleanup);
}
/* pattern restrictions */
ret = lyplg_type_validate_patterns(type_str->patterns, value, value_len, err);
LY_CHECK_GOTO(ret, cleanup);
/* we always need a dynamic value */
if (!(options & LYPLG_TYPE_STORE_DYNAMIC)) {
value = strndup(value, value_len);
LY_CHECK_ERR_GOTO(!value, ret = LY_EMEM, cleanup);
options |= LYPLG_TYPE_STORE_DYNAMIC;
}
/* get the network-byte order address */
if (!inet_pton(AF_INET, value, &val->addr)) {
ret = ly_err_new(err, LY_EVALID, LYVE_DATA, NULL, NULL, "Failed to convert IPv4 address \"%s\".", (char *)value);
goto cleanup;
}
/* store canonical value */
ret = lydict_insert_zc(ctx, (char *)value, &storage->_canonical);
options &= ~LYPLG_TYPE_STORE_DYNAMIC;
LY_CHECK_GOTO(ret, cleanup);
cleanup:
if (options & LYPLG_TYPE_STORE_DYNAMIC) {
free((void *)value);
}
if (ret) {
lyplg_type_free_simple(ctx, storage);
}
return ret;
}
/**
* @brief Implementation of ::lyplg_type_compare_clb for the ipv4-address-no-zone ietf-inet-types type.
*/
static LY_ERR
lyplg_type_compare_ipv4_address_no_zone(const struct lyd_value *val1, const struct lyd_value *val2)
{
struct lyd_value_ipv4_address_no_zone *v1, *v2;
if (val1->realtype != val2->realtype) {
return LY_ENOT;
}
LYD_VALUE_GET(val1, v1);
LYD_VALUE_GET(val2, v2);
if (memcmp(&v1->addr, &v2->addr, sizeof v1->addr)) {
return LY_ENOT;
}
return LY_SUCCESS;
}
/**
* @brief Implementation of ::lyplg_type_print_clb for the ipv4-address-no-zone ietf-inet-types type.
*/
static const void *
lyplg_type_print_ipv4_address_no_zone(const struct ly_ctx *ctx, const struct lyd_value *value, LY_VALUE_FORMAT format,
void *UNUSED(prefix_data), ly_bool *dynamic, size_t *value_len)
{
struct lyd_value_ipv4_address_no_zone *val;
char *ret;
LYD_VALUE_GET(value, val);
if (format == LY_VALUE_LYB) {
*dynamic = 0;
if (value_len) {
*value_len = 4;
}
return &val->addr;
}
/* generate canonical value if not already (loaded from LYB) */
if (!value->_canonical) {
ret = malloc(INET_ADDRSTRLEN);
LY_CHECK_RET(!ret, NULL);
/* get the address in string */
if (!inet_ntop(AF_INET, &val->addr, ret, INET_ADDRSTRLEN)) {
free(ret);
LOGERR(ctx, LY_EVALID, "Failed to get IPv4 address in string (%s).", strerror(errno));
return NULL;
}
/* store it */
if (lydict_insert_zc(ctx, ret, (const char **)&value->_canonical)) {
LOGMEM(ctx);
return NULL;
}
}
/* use the cached canonical value */
if (dynamic) {
*dynamic = 0;
}
if (value_len) {
*value_len = strlen(value->_canonical);
}
return value->_canonical;
}
/**
* @brief Plugin information for ipv4-address-no-zone type implementation.
*
* Note that external plugins are supposed to use:
*
* LYPLG_TYPES = {
*/
const struct lyplg_type_record plugins_ipv4_address_no_zone[] = {
{
.module = "ietf-inet-types",
.revision = "2013-07-15",
.name = "ipv4-address-no-zone",
.plugin.id = "libyang 2 - ipv4-address-no-zone, version 1",
.plugin.store = lyplg_type_store_ipv4_address_no_zone,
.plugin.validate = NULL,
.plugin.compare = lyplg_type_compare_ipv4_address_no_zone,
.plugin.sort = NULL,
.plugin.print = lyplg_type_print_ipv4_address_no_zone,
.plugin.duplicate = lyplg_type_dup_simple,
.plugin.free = lyplg_type_free_simple,
.plugin.lyb_data_len = 4,
},
{0}
};
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