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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: ethertest.py,v 1.7 2006/07/13 10:05:40 gnn Exp $
#
# Author: George V. Neville-Neil
#
# Description: This module performs a self test on an IP packet. That
# is to say it first encodes a packet, then decodes is and makes sure
# that the data matches.
import unittest
import sys
#sys.path.insert(0, "../") # Look locally first.
from pcs import PcapConnector
from pcs import PcapDumpConnector
from pcs.packets.ethernet import *
class etherTestCase(unittest.TestCase):
def test_ethernet(self):
# create one packet, copy its bytes, then compare their fields
ether = ethernet()
assert (ethernet != None)
ether.src = "\x00\x00\x00\x00\x00\x00"
ether.dst = "\xff\xff\xff\xff\xff\xff"
ether.type = 2048
# Create a packet to compare against
ethernew = ethernet()
ethernew.decode(ether.bytes)
self.assertEqual(ether.bytes, ethernew.bytes, "bytes not equal")
self.assertEqual(ether.src, ethernew.src,
"sources not equal ether %s ethernew %s" %
(ether.src, ethernew.src))
self.assertEqual(ether.dst, ethernew.dst,
"destinations not equal ether %s ethernew %s" %
(ether.dst, ethernew.dst))
self.assertEqual(ether.type, ethernew.type,
"types not equal ether %s ethernew %s" %
(ether.type, ethernew.type))
def test_ethernet_eq(self):
"Test whether the eq function works for ethernet"
ether = ethernet()
assert (ether != None)
ether.src = "\x00\x00\x00\x00\x00\x00"
ether.dst = "\xff\xff\xff\xff\xff\xff"
ether.type = 2048
# Create a packet to compare against
ethernew = ethernet()
ethernew.decode(ether.bytes)
self.assertEqual(ether.bytes, ethernew.bytes, "bytes not equal")
self.assertEqual(ether.src, ethernew.src,
"sources not equal ether %s ethernew %s" %
(ether.src, ethernew.src))
self.assertEqual(ether.dst, ethernew.dst,
"destinations not equal ether %s ethernew %s" %
(ether.dst, ethernew.dst))
self.assertEqual(ether.type, ethernew.type,
"types not equal ether %s ethernew %s" %
(ether.type, ethernew.type))
self.assertEqual(ether, ethernew, "ether != to ethernew but should be")
def test_ethernet_read(self):
"""This test reads from a pre-stored pcap file generated with tcpdump and ping on the loopback interface."""
file = PcapConnector("etherping.out")
# packet = file.read()
# ether = ethernet(packet)
ether = file.readpkt()
assert (ether != None)
self.assertEqual(ether.dst, "\x00\x10\xdb\x3a\x3a\x77",
"dst not equal %s" % ether.src)
self.assertEqual(ether.src, "\x00\x0d\x93\x44\xfa\x62",
"src not equal %s" % ether.dst)
self.assertEqual(ether.type, 0x800, "type not equal %d" % ether.type)
def test_ethernet_write(self):
"""This test writes a fake ethernet packet to a dump file."""
from pcs.pcap import DLT_EN10MB
file = PcapDumpConnector("etherdump.out", DLT_EN10MB)
# create one packet, copy its bytes, then compare their fields
ether = ethernet()
assert (ethernet != None)
ether.src = "\x00\x00\x00\x00\x00\x00"
ether.dst = "\xff\xff\xff\xff\xff\xff"
ether.type = 2048
file.write(ether.bytes)
def test_ethernet_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("etherping.out")
packet = file.read()
ether1 = ethernet(packet[0:file.dloff])
ether2 = ethernet(packet[0:file.dloff])
assert (ether1 != None)
assert (ether2 != None)
self.assertEqual(ether1, ether2, "packets should be equal but are not")
ether1.dst = "\xff\xff\xff\xff\xff\xff"
self.assertNotEqual(ether1, ether2, "packets compare equal but should not")
def test_ethernet_print(self):
"""This test reads from a pre-stored pcap file generated with
tcpdump and ping on an ethernet interface and tests the
__str__ method to make sure the correct values are printed."""
file = PcapConnector("etherping.out")
packet = file.read()
ether = ethernet(packet[0:file.dloff])
assert (ether != None)
test_string = "Ethernet\ndst: 0:10:db:3a:3a:77\nsrc: 0:d:93:44:fa:62\ntype: 0x800"
string = ether.__str__()
self.assertEqual(string, test_string,
"strings are not equal \nexpected %s \ngot %s " %
(test_string, string))
def test_ethernet_println(self):
"""This test reads from a pre-stored pcap file generated with
tcpdump and ping on an ethernet interface and tests the
println method to make sure the correct values are printed."""
file = PcapConnector("etherping.out")
packet = file.read()
ether = ethernet(packet[0:file.dloff])
assert (ether != None)
test_string = "<Ethernet: src: \'\\x00\\r\\x93D\\xfab\', dst: \'\\x00\\x10\\xdb::w\', type: 2048>"
string = ether.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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