def test_tcp_with_options(self):
"""Assert that a TCP with options is correctly encoded."""
packet = tcp()
nop = pcs.Field("nop", 8)
mss = pcs.TypeLengthValueField("mss", pcs.Field("t", 8, default=0x02),
pcs.Field("l", 8), pcs.Field("v", 16))
end = pcs.Field("end", 8)
nop.value = 1
mss.value.value = 1460 # Most common Internet MSS value.
# Build a TCP option list which will be 32-bits aligned.
packet.options.append(nop)
packet.options.append(nop)
packet.options.append(mss)
packet.options.append(nop)
packet.options.append(end)
expected = "\x00\x00\x00\x00\x00\x00\x00\x00" \
"\x00\x00\x00\x00\x00\x00\x00\x00" \
"\x00\x00\x00\x00\x01\x01\x02\x04" \
"\x05\xb4\x01\x00"
got = packet.bytes
#packet.encode()
#hd = hexdumper()
#print hd.dump(expected)
#print hd.dump(got)
# XXX: Note well: just because you added an option list,
# doesn't mean the TCP option length is correct.
self.assertEqual(expected, got)
def test_tcp_without_options(self):
"""Assert that a TCP without options does not get any additional
fields appended to it on the wire."""
packet = tcp()
expected = "\x00\x00\x00\x00\x00\x00\x00\x00" \
"\x00\x00\x00\x00\x50\x00\x00\x00" \
"\x00\x00\x00\x00"
got = packet.bytes
#packet.encode()
#hd = hexdumper()
#print hd.dump(expected)
#print hd.dump(got)
self.assertEqual(len(packet.options), 0)
self.assertEqual(expected, got)
def test_tcp_without_options(self):
"""Assert that a TCP without options does not get any additional
fields appended to it on the wire."""
packet = tcp()
expected = "\x00\x00\x00\x00\x00\x00\x00\x00" \
"\x00\x00\x00\x00\x00\x00\x00\x00" \
"\x00\x00\x00\x00"
got = packet.bytes
#packet.encode()
#hd = hexdumper()
#print hd.dump(expected)
#print hd.dump(got)
self.assertEqual(len(packet.options), 0)
self.assertEqual(expected, got)
def test_tcp_with_options(self):
"""Assert that a TCP with options is correctly encoded."""
packet = tcp()
nop = pcs.Field("nop", 8)
mss = pcs.TypeLengthValueField("mss",
pcs.Field("t", 8, default = 0x02),
pcs.Field("l", 8),
pcs.Field("v", 16))
end = pcs.Field("end", 8)
nop.value = 1
mss.value.value = 1460 # Most common Internet MSS value.
# Build a TCP option list which will be 32-bits aligned.
packet.options.append(nop)
packet.options.append(nop)
packet.options.append(mss)
packet.options.append(nop)
packet.options.append(end)
expected = "\x00\x00\x00\x00\x00\x00\x00\x00" \
"\x00\x00\x00\x00\x50\x00\x00\x00" \
"\x00\x00\x00\x00\x01\x01\x02\x04" \
"\x05\xb4\x01\x00"
got = packet.bytes
#packet.encode()
#hd = hexdumper()
#print hd.dump(expected)
#print hd.dump(got)
# XXX: Note well: just because you added an option list,
# doesn't mean the TCP option length is correct.
self.assertEqual(expected, got)