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# Copyright (c) 2005, 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: chaintest.py,v 1.3 2006/06/27 14:45:43 gnn Exp $
#
# Author: George V. Neville-Neil
#
# Description: A test of the Chain class in PCS.
import unittest
import sys
#sys.path.insert(0, '../')
from pcs.packets.ethernet import ethernet
from pcs.packets.ipv4 import ipv4
from pcs import *
class chainTestCase(unittest.TestCase):
def test_chain_compare(self):
"""Test the underlying __eq__ functionality of the
packet. Two packets constructed from the same bytes should be
equal and two that are not should not be equal."""
import pcs.pcap as pcap
file = pcap.pcap("loopping.out")
packet = file.next()[1]
ip1 = ipv4(packet[file.dloff:len(packet)])
ip2 = ipv4(packet[file.dloff:len(packet)])
assert (ip1 != None)
assert (ip2 != None)
ether1 = ethernet()
ether1.src = "\x00\x00\x00\x00\x00\x01"
ether1.dst = "\x00\x00\x00\x00\x00\x02"
ether2 = ethernet()
ether2.src = "\x00\x00\x00\x00\x00\x01"
ether2.dst = "\x00\x00\x00\x00\x00\x02"
chain1 = Chain([ether1, ip1])
chain2 = Chain([ether2, ip2])
self.assertEqual(chain1, chain2, "chains should be equal but are not")
ip1.dst = 0
self.assertNotEqual(chain1, chain2, "chains compare equal but should not")
def test_chain_read(self):
"""Test whether or not the chain method of the base class works."""
file = PcapConnector("loopping.out")
packet = file.readpkt()
chain = packet.chain()
test_string = "Localhost\ntype 2\n IPv4\nversion 4\nhlen 5\ntos 0\nlength 84\nid 59067\nflags 0\noffset 0\nttl 64\nprotocol 1\nchecksum 0\nsrc 127.0.0.1\ndst 127.0.0.1\n ICMPv4\ntype 8\ncode 0\nchecksum 60550"
string = chain.__str__()
self.assertEqual(test_string, string,
"strings not equal \ngot\n%s\nexpected\n%s" %
(string, test_string))
if __name__ == '__main__':
unittest.main()
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