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# Copyright (c) 2006, Neville-Neil Consulting
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# 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
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# Neither the name of Neville-Neil Consulting 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, 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.
#
# File: $Id: localhost.py,v 1.1 2006/07/04 13:30:10 gnn Exp $
#
# Author: George V. Neville-Neil
#
# Description: A packet to handle localhost encoded tcpdump packets.
import socket
import pcs
from pcs.packets import ipv4
from pcs.packets import ipv6
class localhost(pcs.Packet):
layout = pcs.Layout()
def __init__(self, bytes = None):
"""initialize a localhost header, needed to read or write to lo0"""
type = pcs.Field("type", 32)
lolen = 4
pcs.Packet.__init__(self, [type], bytes = bytes)
self.description = "Localhost"
if (bytes != None):
self.data = self.next(bytes[lolen:len(bytes)])
else:
self.data = None
def next(self, bytes):
"""Decode the type of a packet and return the correct higher
level protocol object"""
print self.type
print socket.AF_INET6
## type is the address family, and NOT an ethertype
if self.type == socket.AF_INET:
return ipv4.ipv4(bytes)
if self.type == socket.AF_INET6:
return ipv6.ipv6(bytes)
return None
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