/*
 * Copyright (c) 2021-2021, Huawei Technologies Co., Ltd. All rights reserved.
 * Copyright (c) 2020-2021 Huawei Device Co., Ltd. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this list of
 * conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice, this list
 * of conditions and the following disclaimer in the documentation and/or other materials
 * provided with the distribution.
 *
 * 3. Neither the name of the copyright holder nor the names of its contributors may be used
 * to endorse or promote products derived from this software without specific prior written
 * permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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 */

#include "lt_net_netdb.h"
#include <net/if.h>
// 引入头文件，包括网络数据库相关的函数声明和宏定义，以及网络接口相关的函数和宏定义。

static int IfNameToIndexTest(void)
{
    int ret;
    char if_name[20];
    char *str = nullptr;

    ret = if_nametoindex("lo");
    // 调用if_nametoindex函数将接口名称"lo"转换为系统索引。
    ICUNIT_ASSERT_NOT_EQUAL(ret, 0, -1);
    // 断言转换成功，返回的索引值不为0。

    str = if_indextoname(ret, if_name);
    // 调用if_indextoname函数将系统索引转换回接口名称。
    ICUNIT_ASSERT_NOT_EQUAL(str, nullptr, -1);
    // 断言转换成功，返回的字符串指针不为nullptr。
    ICUNIT_ASSERT_STRING_EQUAL(if_name, "lo", -1);
    // 断言转换回的接口名称为"lo"。

    ret = if_nametoindex("eth1");
    // 尝试调用if_nametoindex函数将接口名称"eth1"转换为系统索引。
    ICUNIT_ASSERT_EQUAL(ret, 0, ret);
    // 断言转换失败，返回的索引值为0。
    ICUNIT_ASSERT_EQUAL(errno, ENODEV, errno);
    // 断言errno被设置为ENODEV，表示没有找到对应的设备。

    return ICUNIT_SUCCESS;
    // 返回测试成功。
}

void NetNetDbTest015(void)
{
    TEST_ADD_CASE(__FUNCTION__, IfNameToIndexTest, TEST_POSIX, TEST_TCP, TEST_LEVEL0, TEST_FUNCTION);
}
// 定义测试用例，将IfNameToIndexTest函数注册为一个测试案例。