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  1. /*
  2.  * Copyright (c) 2009 Lukas Mejdrech
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. /** @addtogroup arp
  30.  *  @{
  31.  */
  32.  
  33. /** @file
  34.  *  ARP protocol header.
  35.  *  Based on the RFC~826.
  36.  */
  37.  
  38. #ifndef __NET_ARP_HEADER_H__
  39. #define __NET_ARP_HEADER_H__
  40.  
  41. #include <sys/types.h>
  42.  
  43. /** Type definition of an ARP protocol header.
  44.  *  @see arp_header
  45.  */
  46. typedef struct arp_header   arp_header_t;
  47.  
  48. /** Type definition of an ARP protocol header pointer.
  49.  *  @see arp_header
  50.  */
  51. typedef arp_header_t *      arp_header_ref;
  52.  
  53. /** ARP protocol header.
  54.  */
  55. struct arp_header{
  56.     /** Hardware type identifier.
  57.      *  @see hardware.h
  58.      */
  59.     uint16_t    hardware;
  60.     /** Protocol identifier.
  61.      */
  62.     uint16_t    protocol;
  63.     /** Hardware address length in bytes.
  64.      */
  65.     uint8_t     hardware_length;
  66.     /** Protocol address length in bytes.
  67.      */
  68.     uint8_t     protocol_length;
  69.     /** ARP packet type.
  70.      *  @see arp_oc.h
  71.      */
  72.     uint16_t    operation;
  73. } __attribute__ ((packed));
  74.  
  75. #endif
  76.  
  77. /** @}
  78.  */
  79.