# $Id: ethernet.rb 14 2008-03-02 05:42:30Z warchild $
#
# Copyright (c) 2008, Jon Hart 
# All rights reserved.
# 
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
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#       notice, this list of conditions and the following disclaimer.
#     * Redistributions in binary form must reproduce the above copyright
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#       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 Jon Hart ``AS IS'' AND ANY
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#
# Ethernet II (DIX v2.0)
#
# http://en.wikipedia.org/wiki/Ethernet_II_framing
class Ethernet < RacketPart
  ETHERTYPE_IPV4 = 0x0800
  ETHERTYPE_ARP = 0x0806
  ETHERTYPE_RARP = 0x8035
  ETHERTYPE_APPLETALK = 0x809b
  ETHERTYPE_AARP = 0x80f3
  ETHERTYPE_8021Q = 0x8100
  ETHERTYPE_IPX = 0x8137
  ETHERTYPE_NOVELL = 0x8138
  ETHERTYPE_IPV6 = 0x86DD
  ETHERTYPE_MPLS_UNICAST = 0x8847
  ETHERTYPE_MPLS_MULTICAST = 0x8848
  ETHERTYPE_PPPOE_DISCOVERY = 0x8863
  ETHERTYPE_PPPOE_SESSION = 0x8864
  ETHERTYPE_8021X = 0x888E
  ETHERTYPE_ATAOE = 0x88A2
  ETHERTYPE_8021AE = 0x88E5

  # Destination MAC address
  hex_octets :dst_mac, 48
  # Source MAC address
  hex_octets :src_mac, 48
  # Protocol of payload send with this ethernet datagram.  Defaults to IPV4
  unsigned :ethertype, 16, { :default => ETHERTYPE_IPV4 }
  # Payload
  rest :payload
end
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