/*

 *  Copyright (c) 2018, The OpenThread Authors.

 *  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 OTHERWISE)

 *  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

 *  POSSIBILITY OF SUCH DAMAGE.

 */

#include <stdlib.h>

#include <string.h>

#include <openthread/instance.h>

#include <openthread/ip6.h>

#include <openthread/link.h>

#include <openthread/ncp.h>

#include <openthread/srp_server.h>

#include <openthread/tasklet.h>

#include <openthread/thread.h>

#include <openthread/thread_ftd.h>

#include <openthread/platform/alarm-milli.h>

#include "fuzzer_platform.h"

#include "common/code_utils.hpp"

#include "common/time.hpp"

static int HdlcSend(const uint8_t *aBuf, uint16_t aBufLength)

{

    OT_UNUSED_VARIABLE(aBuf);

    OT_UNUSED_VARIABLE(aBufLength);

    return aBufLength;

}

void AdvanceTime(otInstance *aInstance, uint32_t aDuration)

{

    uint32_t time = otPlatAlarmMilliGetNow() + aDuration;

    while (ot::TimeMilli(otPlatAlarmMilliGetNow()) <= ot::TimeMilli(time))

    {

        while (otTaskletsArePending(aInstance))

        {

            otTaskletsProcess(aInstance);

        }

        FuzzerPlatformProcess(aInstance);

    }

}

extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)

{

    const otPanId panId = 0xdead;

    otInstance *instance = nullptr;

    uint8_t    *buf      = nullptr;

    VerifyOrExit(size <= 65536);

    FuzzerPlatformInit();

    instance = otInstanceInitSingle();

    otNcpHdlcInit(instance, HdlcSend);

    IgnoreError(otLinkSetPanId(instance, panId));

    IgnoreError(otIp6SetEnabled(instance, true));

    IgnoreError(otThreadSetEnabled(instance, true));

    otSrpServerSetEnabled(instance, true);

    IgnoreError(otThreadBecomeLeader(instance));

    AdvanceTime(instance, 10000);

    buf = static_cast<uint8_t *>(malloc(size));

    memcpy(buf, data, size);

    otNcpHdlcReceive(buf, static_cast<uint16_t>(size));

    VerifyOrExit(!FuzzerPlatformResetWasRequested());

    AdvanceTime(instance, 10000);

exit:

    if (buf != nullptr)

    {

        free(buf);

    }

    if (instance != nullptr)

    {

        otInstanceFinalize(instance);

    }

    return 0;

}