def testAddingBadProtos_WrongLevel(self):
"""Adding a wrong level protocol raises an exception."""
e = ip.IPProtocol()
try:
e.addProto(42, "silliness")
except components.CannotAdapt:
pass
else:
raise AssertionError("addProto must raise an exception for bad protocols")
def testAddingBadProtos_TooBig2(self):
"""Adding a protocol with a number >=2**32 raises an exception."""
e = ip.IPProtocol()
try:
e.addProto(2L**32 + 1, MyProtocol([]))
except TypeError, e:
if e.args == ('Added protocol must fit in 32 bits', ):
pass
else:
raise
def testAddingBadProtos_TooSmall(self):
"""Adding a protocol with a negative number raises an exception."""
e = ip.IPProtocol()
try:
e.addProto(-1, MyProtocol([]))
except TypeError, e:
if e.args == ('Added protocol must be positive or zero', ):
pass
else:
raise
def testAddingBadProtos_TooBig2(self):
"""Adding a protocol with a number >=2**32 raises an exception."""
e = ip.IPProtocol()
try:
e.addProto(2 ** 32 + 1, MyProtocol([]))
except TypeError as e:
if e.args == ("Added protocol must fit in 32 bits",):
pass
else:
raise
else:
raise AssertionError("addProto must raise an exception for bad protocols")
def testAddingBadProtos_TooSmall(self):
"""Adding a protocol with a negative number raises an exception."""
e = ip.IPProtocol()
try:
e.addProto(-1, MyProtocol([]))
except TypeError as e:
if e.args == ("Added protocol must be positive or zero",):
pass
else:
raise
else:
raise AssertionError("addProto must raise an exception for bad protocols")
def testPacketParsing(self):
proto = ip.IPProtocol()
p1 = MyProtocol(
[
(
b"foobar",
{
"partial": 0,
"dest": "1.2.3.4",
"source": "5.6.7.8",
"protocol": 0x0F,
"version": 4,
"ihl": 20,
"tos": 7,
"tot_len": 20 + 6,
"fragment_id": 0xDEAD,
"fragment_offset": 0x1EEF,
"dont_fragment": 0,
"more_fragments": 1,
"ttl": 0xC0,
},
),
]
)
proto.addProto(0x0F, p1)
proto.datagramReceived(
b"\x54" # ihl version
+ b"\x07" # tos
+ b"\x00\x1a" # tot_len
+ b"\xDE\xAD" # id
+ b"\xBE\xEF" # frag_off
+ b"\xC0" # ttl
+ b"\x0F" # protocol
+ b"FE" # checksum
+ b"\x05\x06\x07\x08"
+ b"\x01\x02\x03\x04"
+ b"foobar",
partial=0,
dest="dummy",
source="dummy",
protocol="dummy",
)
assert not p1.expecting, (
"Should not expect any more packets, but still want %r" % p1.expecting
)
def testWrongProtoNotSeen(self):
proto = ip.IPProtocol()
p1 = MyProtocol([])
proto.addProto(1, p1)
proto.datagramReceived("\x54" #ihl version
+ "\x07" #tos
+ "\x00\x1a" #tot_len
+ "\xDE\xAD" #id
+ "\xBE\xEF" #frag_off
+ "\xC0" #ttl
+ "\x0F" #protocol
+ "FE" #checksum
+ "\x05\x06\x07\x08" + "\x01\x02\x03\x04" + "foobar",
partial=0,
dest='dummy',
source='dummy',
protocol='dummy',
)
def testPacketParsing(self):
proto = ip.IPProtocol()
p1 = MyProtocol([
(b'foobar', {
'partial': 0,
'dest': '1.2.3.4',
'source': '5.6.7.8',
'protocol': 0x0F,
'version': 4,
'ihl': 20,
'tos': 7,
'tot_len': 20+6,
'fragment_id': 0xDEAD,
'fragment_offset': 0x1EEF,
'dont_fragment': 0,
'more_fragments': 1,
'ttl': 0xC0,
}),
])
proto.addProto(0x0F, p1)
proto.datagramReceived(b"\x54" #ihl version
+ b"\x07" #tos
+ b"\x00\x1a" #tot_len
+ b"\xDE\xAD" #id
+ b"\xBE\xEF" #frag_off
+ b"\xC0" #ttl
+ b"\x0F" #protocol
+ b"FE" #checksum
+ b"\x05\x06\x07\x08"
+ b"\x01\x02\x03\x04"
+ b"foobar",
partial=0,
dest='dummy',
source='dummy',
protocol='dummy',
)
assert not p1.expecting, \
'Should not expect any more packets, but still want %r' % p1.expecting
def testWrongProtoNotSeen(self):
proto = ip.IPProtocol()
p1 = MyProtocol([])
proto.addProto(1, p1)
proto.datagramReceived(
chr(84) #ihl version
+ chr(07) #tos
+ chr(0) + chr(26) #tot_len
+ chr(222) + chr(173) #id
+ chr(190) + chr(239) #frag_off
+ chr(192) #ttl
+ chr(15) #protocol
+ chr(254) #checksum
+ b"\x05\x06\x07\x08" + b"\x01\x02\x03\x04" + b"foobar",
partial=0,
dest='dummy',
source='dummy',
protocol='dummy',
)
def testPacketParsing(self):
proto = ip.IPProtocol()
p1 = MyProtocol([
(b'foobar', {
'partial': 0,
'dest': '1.2.3.4',
'source': '5.6.7.8',
'protocol': 0x0F,
'version': 4,
'ihl': 20,
'tos': 7,
'tot_len': 20 + 6,
'fragment_id': 0xDEAD,
'fragment_offset': 0x1EEF,
'dont_fragment': 0,
'more_fragments': 1,
'ttl': 0xC0,
}),
])
proto.addProto(0x0F, p1)
proto.datagramReceived(
chr(84) #ihl version
+ chr(07) #tos
+ chr(0) + chr(26) #tot_len
+ chr(222) + chr(173) #id
+ chr(190) + chr(239) #frag_off
+ chr(192) #ttl
+ chr(15) #protocol
+ chr(254) #checksum
+ b"\x05\x06\x07\x08" + b"\x01\x02\x03\x04" + b"foobar",
partial=0,
dest='dummy',
source='dummy',
protocol='dummy',
)
assert not p1.expecting, \
'Should not expect any more packets, but still want %r' % p1.expecting
# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.
from twisted.internet import reactor, protocol
from twisted.pair import ethernet, rawudp, ip
from twisted.pair import tuntap
class MyProto(protocol.DatagramProtocol):
def datagramReceived(self, *a, **kw):
print a, kw
p_udp = rawudp.RawUDPProtocol()
p_udp.addProto(42, MyProto())
p_ip = ip.IPProtocol()
p_ip.addProto(17, p_udp)
p_eth = ethernet.EthernetProtocol()
p_eth.addProto(0x800, p_ip)
port = tuntap.TuntapPort(interface='tap0', proto=p_eth, reactor=reactor)
port.startListening()
reactor.run()
