radiopacketfunctions.h

tinyos-2.0源代码！转载而已！要的尽管拿！

/* -*- mode:c++; indent-tabs-mode: nil -*-
 * Copyright (c) 2006, Technische Universitaet Berlin
 * All rights reserved.
 *
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 * modification, are permitted provided that the following conditions
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 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
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 *   documentation and/or other materials provided with the distribution.
 * - Neither the name of the Technische Universitaet Berlin 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
 * OWNER 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,
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 *
 * - Description ---------------------------------------------------------
 * Platformindependant packet structure accessor functions
 * - Author --------------------------------------------------------------
 * @author: Philipp Huppertz ([e-mail])
 * ========================================================================
 */


#ifndef RADIO_PACKET_FUNCTIONS_H
#define RADIO_PACKET_FUNCTIONS_H

#include "message.h"

/* Packet structure accessor functions
   * note: platform-independant radiostructures are called message_radio_header_t & message_radio_footer_t */
  message_radio_header_t* getHeader(message_t* amsg) {
    return (message_radio_header_t*)(amsg->data - sizeof(message_radio_header_t));
  }

  message_radio_footer_t* getFooter(message_t* amsg) {
    return (message_radio_footer_t*)(amsg->footer);
  }

  message_radio_metadata_t* getMetadata(message_t* amsg) {
    return (message_radio_metadata_t*)((uint8_t*)amsg->footer + sizeof(message_radio_footer_t));
  }

#endif