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 *  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.
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 *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 *  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 */

/**
 * @file
 *   This file implements function for generating and processing MLE TLVs.
 */

#include "mle_tlvs.hpp"

#include "common/clearable.hpp"
#include "common/code_utils.hpp"
#include "common/numeric_limits.hpp"
#include "radio/radio.hpp"

namespace ot {
namespace Mle {

#if !OPENTHREAD_CONFIG_MLE_LONG_ROUTES_ENABLE

void RouteTlv::Init(void)
{
    SetType(kRoute);
    SetLength(sizeof(*this) - sizeof(Tlv));
    mRouterIdMask.Clear();
    ClearAllBytes(mRouteData);
}

bool RouteTlv::IsValid(void) const
{
    bool    isValid = false;
    uint8_t numAllocatedIds;

    VerifyOrExit(GetLength() >= sizeof(mRouterIdSequence) + sizeof(mRouterIdMask));

    numAllocatedIds = mRouterIdMask.GetNumberOfAllocatedIds();
    VerifyOrExit(numAllocatedIds <= Mle::kMaxRouters);

    isValid = (GetRouteDataLength() >= numAllocatedIds);

exit:
    return isValid;
}

#endif // #if !OPENTHREAD_CONFIG_MLE_LONG_ROUTES_ENABLE

void ConnectivityTlv::IncrementLinkQuality(LinkQuality aLinkQuality)
{
    switch (aLinkQuality)
    {
    case kLinkQuality0:
        break;
    case kLinkQuality1:
        mLinkQuality1++;
        break;
    case kLinkQuality2:
        mLinkQuality2++;
        break;
    case kLinkQuality3:
        mLinkQuality3++;
        break;
    }
}

int8_t ConnectivityTlv::GetParentPriority(void) const
{
    return Preference::From2BitUint(mFlags >> kFlagsParentPriorityOffset);
}

void ConnectivityTlv::SetParentPriority(int8_t aParentPriority)
{
    mFlags = static_cast<uint8_t>(Preference::To2BitUint(aParentPriority) << kFlagsParentPriorityOffset);
}

void ChannelTlvValue::SetChannelAndPage(uint16_t aChannel)
{
    uint8_t channelPage = OT_RADIO_CHANNEL_PAGE_0;

#if OPENTHREAD_CONFIG_RADIO_915MHZ_OQPSK_SUPPORT
    if ((OT_RADIO_915MHZ_OQPSK_CHANNEL_MIN <= aChannel) && (aChannel <= OT_RADIO_915MHZ_OQPSK_CHANNEL_MAX))
    {
        channelPage = OT_RADIO_CHANNEL_PAGE_2;
    }
#endif

#if OPENTHREAD_CONFIG_PLATFORM_RADIO_PROPRIETARY_SUPPORT
    if ((OPENTHREAD_CONFIG_PLATFORM_RADIO_PROPRIETARY_CHANNEL_MIN == aChannel) ||
        ((OPENTHREAD_CONFIG_PLATFORM_RADIO_PROPRIETARY_CHANNEL_MIN < aChannel) &&
         (aChannel <= OPENTHREAD_CONFIG_PLATFORM_RADIO_PROPRIETARY_CHANNEL_MAX)))
    {
        channelPage = OPENTHREAD_CONFIG_PLATFORM_RADIO_PROPRIETARY_CHANNEL_PAGE;
    }
#endif

    SetChannelPage(channelPage);
    SetChannel(aChannel);
}

bool ChannelTlvValue::IsValid(void) const
{
    bool     isValid = false;
    uint16_t channel;

    VerifyOrExit(Radio::SupportsChannelPage(mChannelPage));

    channel = GetChannel();
    VerifyOrExit((Radio::kChannelMin <= channel) && (channel <= Radio::kChannelMax));

    isValid = true;

exit:
    return isValid;
}

} // namespace Mle
} // namespace ot