examples/platforms/utils/mac_frame.h

/*
 *  Copyright (c) 2019, The OpenThread Authors.
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 *  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
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 *  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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 */

/**
 * @file
 * @brief
 *   This file defines the mac frame interface for OpenThread platform radio drivers.
 *
 */

#ifndef OPENTHREAD_UTILS_MAC_FRAME_H
#define OPENTHREAD_UTILS_MAC_FRAME_H

#include <openthread/platform/radio.h>

#ifdef __cplusplus
extern "C" {
#endif

/**
 * This enumeration specifies the IEEE 802.15.4 Address type.
 *
 */
typedef enum
{
    OT_MAC_ADDRESS_TYPE_NONE,     ///< No address.
    OT_MAC_ADDRESS_TYPE_SHORT,    ///< IEEE 802.15.4 Short Address.
    OT_MAC_ADDRESS_TYPE_EXTENDED, ///< IEEE 802.15.4 Extended Address.
} otMacAddressType;

/**
 * This structure represents an IEEE 802.15.4 short or extended Address.
 *
 */
typedef struct otMacAddress
{
    union
    {
        otShortAddress mShortAddress; ///< The IEEE 802.15.4 Short Address.
        otExtAddress   mExtAddress;   ///< The IEEE 802.15.4 Extended Address.
    } mAddress;

    otMacAddressType mType; ///< The address type (short, extended, or none).
} otMacAddress;

/**
 * Check if @p aFrame is an Ack frame.
 *
 * @param[in]   aFrame          A pointer to the frame.
 *
 * @retval  true    It is an ACK frame.
 * @retval  false   It is not an ACK frame.
 *
 */
bool otMacFrameIsAck(const otRadioFrame *aFrame);

/**
 * Check if @p aFrame is an Data Request Command.
 *
 * @param[in]   aFrame          A pointer to the frame.
 *
 * @retval  true    It is a Data Request Command frame.
 * @retval  false   It is not a Data Request Command frame.
 *
 */
bool otMacFrameIsDataRequest(const otRadioFrame *aFrame);

/**
 * Check if @p aFrame requests ACK.
 *
 * @param[in]   aFrame          A pointer to the frame.
 *
 * @retval  true    It requests ACK.
 * @retval  false   It does not request ACK.
 *
 */
bool otMacFrameIsAckRequested(const otRadioFrame *aFrame);

/**
 * Check if @p aFrame matches the @p aPandId and @p aShortAddress or @p aExtAddress.
 *
 * @param[in]   aFrame          A pointer to the frame.
 * @param[in]   aPanId          The PAN id to match with.
 * @param[in]   aShortAddress   The short address to match with.
 * @param[in]   aExtAddress     The extended address to match with.
 *
 * @retval  true    It is a broadcast or matches with the PAN id and one of the addresses.
 * @retval  false   It doesn't match.
 *
 */
bool otMacFrameDoesAddrMatch(const otRadioFrame *aFrame,
                             otPanId             aPanId,
                             otShortAddress      aShortAddress,
                             const otExtAddress *aExtAddress);

/**
 * Get source MAC address.
 *
 * @param[in]   aFrame          A pointer to the frame.
 * @param[out]  aMacAddress     A pointer to MAC address.
 *
 * @retval  OT_ERROR_NONE   Successfully got the source MAC address.
 * @retval  OT_ERROR_PARSE  Failed to parse the source MAC address.
 *
 */
otError otMacFrameGetSrcAddr(const otRadioFrame *aFrame, otMacAddress *aMacAddress);

/**
 * Get the sequence of @p aFrame.
 *
 * @param[in]   aFrame          A pointer to the frame.
 *
 * @returns The sequence of the frame.
 *
 */
uint8_t otMacFrameGetSequence(const otRadioFrame *aFrame);

/**
 * This function performs AES CCM on the frame which is going to be sent.
 *
 * @param[in]  aFrame       A pointer to the MAC frame buffer that is going to be sent.
 * @param[in]  aExtAddress  A pointer to the extended address, which will be used to generate nonce
 *                          for AES CCM computation.
 *
 */
void otMacFrameProcessTransmitAesCcm(otRadioFrame *aFrame, const otExtAddress *aExtAddress);

#ifdef __cplusplus
} // extern "C"
#endif

#endif // OPENTHREAD_UTILS_MAC_FRAME_H