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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: ipv6test.py,v 1.4 2006/08/01 13:35:58 gnn Exp $
#
# Author: George V. Neville-Neil
#
# Description: This module performs a self test on the IPv6 packet.
# That is to say it first encodes a packet, then decodes it and makes
# sure that the data matches.
import unittest
import sys
#sys.path.insert(0, "..") # Look locally first.
from pcs import PcapConnector
from pcs.packets.ipv6 import *
from socket import AF_INET6, inet_pton
class ip6TestCase(unittest.TestCase):
def test_ipv6(self):
# create one packet, copy its bytes, then compare their fields
ip = ipv6()
assert (ip != None)
ip.traffic_class = 1
ip.flow = 0
ip.length = 64
ip.next_header = 6
ip.hop = 64
ip.src = inet_pton(AF_INET6, "::1")
ip.dst = inet_pton(AF_INET6, "::1")
# Create a packet to compare against
ipnew = ipv6()
ipnew.decode(ip.bytes)
self.assertEqual(ip.bytes, ipnew.bytes, "bytes not equal")
self.assertEqual(ipnew.version, 6,
"version not equal %d" % ipnew.version)
self.assertEqual(ipnew.traffic_class, 1,
"traffic_class not equal %d" % ipnew.traffic_class)
self.assertEqual(ipnew.flow, 0, "flow not equal %d" % ipnew.flow)
self.assertEqual(ipnew.length, 64, "length not equal %d" % ipnew.length)
self.assertEqual(ipnew.next_header, 6,
"next_header not equal %d" % ipnew.next_header)
self.assertEqual(ipnew.hop, 64, "hop not equal %d" % ipnew.hop)
self.assertEqual(ipnew.src, inet_pton(AF_INET6, "::1"),
"src not equal %s" % ipnew.src)
self.assertEqual(ipnew.dst, inet_pton(AF_INET6, "::1"),
"dst not equal %s" % ipnew.dst)
def test_ipv6_read(self):
"""This test reads from a pre-stored pcap file generated with tcpdump and ping on the loopback interface."""
file = PcapConnector("loopping6.out")
packet = file.read()
ip = ipv6(packet[file.dloff:len(packet)])
assert (ip != None)
self.assertEqual(ip.version, 6,
"version not equal %d" % ip.version)
self.assertEqual(ip.traffic_class, 0,
"traffic_class not equal %d" % ip.traffic_class)
self.assertEqual(ip.flow, 0, "flow not equal %d" % ip.flow)
self.assertEqual(ip.length, 16, "length not equal %d" % ip.length)
self.assertEqual(ip.next_header, 58,
"next_header not equal %d" % ip.next_header)
self.assertEqual(ip.hop, 64, "hop not equal %d" % ip.hop)
self.assertEqual(ip.src, inet_pton(AF_INET6, "::1"),
"src not equal %s" % ip.src)
self.assertEqual(ip.dst, inet_pton(AF_INET6, "::1"),
"dst not equal %s" % ip.dst)
def test_ipv6_compare(self):
"""Test the underlying __compare__ functionality of the
packet. Two packets constructed from the same bytes should be
equal and two that are not should not be equal."""
file = PcapConnector("loopping6.out")
packet = file.read()
ip1 = ipv6(packet[file.dloff:len(packet)])
ip2 = ipv6(packet[file.dloff:len(packet)])
assert (ip1 != None)
assert (ip2 != None)
self.assertEqual(ip1, ip2, "packets should be equal but are not")
ip1.dst = inet_pton(AF_INET6, "2001:ffff::1");
self.assertNotEqual(ip1, ip2, "packets compare equal but should not")
def test_ipv6_print(self):
"""This test reads from a pre-stored pcap file generated with
tcpdump and ping on the loopback interface and tests the
__str__ method to make sure the correct values are printed."""
file = PcapConnector("loopping6.out")
packet = file.read()
ip = ipv6(packet[file.dloff:len(packet)])
assert (ip != None)
test_string = "version 6\ntraffic_class 0\nflow 0\nlength 16\nnext_header 58\nhop 64\nsrc ::1\ndst ::1\n"
string = ip.__str__()
self.assertEqual(string, test_string,
"strings are not equal \nexpected %s \ngot %s " %
(test_string, string))
def test_ipv6_println(self):
"""This test reads from a pre-stored pcap file generated with
tcpdump and ping on the loopback interface and tests the
__str__ method to make sure the correct values are printed."""
file = PcapConnector("loopping6.out")
packet = file.read()
ip = ipv6(packet[file.dloff:len(packet)])
assert (ip != None)
test_string = "<IPv6: src: \'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x01\', dst: \'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x01\', traffic_class: 0, flow: 0, length: 16, version: 6, hop: 64, next_header: 58>"
string = ip.println()
self.assertEqual(string, test_string,
"strings are not equal \nexpected %s \ngot %s " %
(test_string, string))
if __name__ == '__main__':
unittest.main()
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