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# File: $Id: dhcpv4.py,v 1.4 2006/06/27 14:45:43 gnn Exp $
#
# Author: George V. Neville-Neil
#
# Description:  A class implementing a DHCPv4 packet
#

import pcs

class dhcpv4(pcs.Packet):

    layout = pcs.Layout()

    def __init__(self, bytes = None):
        """initialize a DHCPv4 packet"""
        op = pcs.Field("op", 8)
        htype = pcs.Field("htype", 8)
        hlen = pcs.Field("hlen", 8)
        hops = pcs.Field("hops", 8)
        xid = pcs.Field("xid", 32)
        secs = pcs.Field("secs", 16)
        flags = pcs.Field("flags", 16)
        ciaddr = pcs.Field("ciaddr", 32)
        yiaddr = pcs.Field("yiaddr", 32)
        siaddr = pcs.Field("siaddr", 32)
        giaddr = pcs.Field("giaddr", 32)
        chaddr = pcs.Field("chaddr", 16 * 8)
        sname = pcs.Field("sname", 64 * 8)
        file = pcs.Field("file", 128 * 8)
        options = pcs.Field("options", 128 * 8)
        pcs.Packet.__init__(self,
                            [op, htype, hlen, hops, xid, secs, flags,
                             ciaddr, yiaddr, siaddr, giaddr, sname, file,
                             options],
                            bytes)
        self.description = "DHCPv4"