text: /*
   * Copyright (c) 2013, Hasso-Plattner-Institut.
   * 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 Institute 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 INSTITUTE 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 INSTITUTE 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.
   *
   * This file is part of the Contiki operating system.
   *
   */
  
  /**
   * \file
   *         Common functionality of 802.15.4-compliant llsec_drivers.
   * \author
   *         Konrad Krentz <konrad.krentz@gmail.com>
   */
  
  /**
   * \addtogroup llsec
   * @{
   */
  
  /**
   * \defgroup llsec802154 Link Layer Security Common Functionality
   * 
   * Common functionality of 802.15.4-compliant llsec_drivers.
   * 
   * @{
   */
  
  #ifndef LLSEC802154_H_
  #define LLSEC802154_H_
  
  #include "contiki/mac/frame802154.h"
  #include "contiki/ip/uip.h"
  
  #ifdef LLSEC802154_CONF_SECURITY_LEVEL
  #define LLSEC802154_SECURITY_LEVEL     LLSEC802154_CONF_SECURITY_LEVEL
  #else /* LLSEC802154_CONF_SECURITY_LEVEL */
  #define LLSEC802154_SECURITY_LEVEL     FRAME802154_SECURITY_LEVEL_NONE
  #endif /* LLSEC802154_CONF_SECURITY_LEVEL */
  
  #if ((LLSEC802154_SECURITY_LEVEL < 0) || (LLSEC802154_SECURITY_LEVEL > 7))
  #error "unsupported security level"
  #endif
  
  #define LLSEC802154_SECURITY_LEVEL_MIC (LLSEC802154_SECURITY_LEVEL & 3)
  #if LLSEC802154_SECURITY_LEVEL_MIC
  #define LLSEC802154_MIC_LENGTH         (2 << LLSEC802154_SECURITY_LEVEL_MIC)
  #else
  #define LLSEC802154_MIC_LENGTH         0
  #endif
  
  #ifdef LLSEC802154_CONF_USES_ENCRYPTION
  #define LLSEC802154_USES_ENCRYPTION    LLSEC802154_CONF_USES_ENCRYPTION
  #else /* LLSEC802154_CONF_USES_ENCRYPTION */
  #define LLSEC802154_USES_ENCRYPTION    (LLSEC802154_SECURITY_LEVEL & (1 << 2))
  #endif /* LLSEC802154_CONF_USES_ENCRYPTION */
  
  #ifdef LLSEC802154_CONF_USES_EXPLICIT_KEYS
  #define LLSEC802154_USES_EXPLICIT_KEYS LLSEC802154_CONF_USES_EXPLICIT_KEYS
  #else /* LLSEC802154_CONF_USES_EXPLICIT_KEYS */
  #define LLSEC802154_USES_EXPLICIT_KEYS 0
  #endif /* LLSEC802154_CONF_USES_EXPLICIT_KEYS */
  
  #if UIP_BYTE_ORDER == UIP_LITTLE_ENDIAN
  #define LLSEC802154_HTONS(n) (n)
  #define LLSEC802154_HTONL(n) (n)
  #else /* UIP_CONF_BYTE_ORDER == UIP_LITTLE_ENDIAN */
  #define LLSEC802154_HTONS(n) (uint16_t)((((uint16_t) (n)) << 8) | (((uint16_t) (n)) >> 8))
  #define LLSEC802154_HTONL(n) (((uint32_t)UIP_HTONS(n) << 16) | UIP_HTONS((uint32_t)(n) >> 16))
  #endif /* UIP_CONF_BYTE_ORDER == UIP_LITTLE_ENDIAN */
  
  #endif /* LLSEC802154_H_ */
  
  /** @} */
  /** @} */
  