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# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.
#
from twisted.trial import unittest
from twisted.internet import protocol
from twisted.pair import rawudp
class MyProtocol(protocol.DatagramProtocol):
def __init__(self, expecting):
self.expecting = list(expecting)
def datagramReceived(self, data, peer):
(host, port) = peer
assert self.expecting, 'Got a packet when not expecting anymore.'
expectData, expectHost, expectPort = self.expecting.pop(0)
assert expectData == data, "Expected data %r, got %r" % (expectData, data)
assert expectHost == host, "Expected host %r, got %r" % (expectHost, host)
assert expectPort == port, "Expected port %d=0x%04x, got %d=0x%04x" % (expectPort, expectPort, port, port)
class RawUDPTests(unittest.TestCase):
def testPacketParsing(self):
proto = rawudp.RawUDPProtocol()
p1 = MyProtocol([
(b'foobar', b'testHost', 0x43A2),
])
proto.addProto(0xF00F, p1)
proto.datagramReceived(b"\x43\xA2" #source
b"\xf0\x0f" #dest
b"\x00\x06" #len
b"\xDE\xAD" #check
b"foobar",
partial=0,
dest=b'dummy',
source=b'testHost',
protocol=b'dummy',
version=b'dummy',
ihl=b'dummy',
tos=b'dummy',
tot_len=b'dummy',
fragment_id=b'dummy',
fragment_offset=b'dummy',
dont_fragment=b'dummy',
more_fragments=b'dummy',
ttl=b'dummy',
)
assert not p1.expecting, \
'Should not expect any more packets, but still want %r' % p1.expecting
def testMultiplePackets(self):
proto = rawudp.RawUDPProtocol()
p1 = MyProtocol([
(b'foobar', b'testHost', 0x43A2),
(b'quux', b'otherHost', 0x33FE),
])
proto.addProto(0xF00F, p1)
proto.datagramReceived(b"\x43\xA2" #source
b"\xf0\x0f" #dest
b"\x00\x06" #len
b"\xDE\xAD" #check
b"foobar",
partial=0,
dest=b'dummy',
source=b'testHost',
protocol=b'dummy',
version=b'dummy',
ihl=b'dummy',
tos=b'dummy',
tot_len=b'dummy',
fragment_id=b'dummy',
fragment_offset=b'dummy',
dont_fragment=b'dummy',
more_fragments=b'dummy',
ttl=b'dummy',
)
proto.datagramReceived(b"\x33\xFE" #source
b"\xf0\x0f" #dest
b"\x00\x05" #len
b"\xDE\xAD" #check
b"quux",
partial=0,
dest=b'dummy',
source=b'otherHost',
protocol=b'dummy',
version=b'dummy',
ihl=b'dummy',
tos=b'dummy',
tot_len=b'dummy',
fragment_id=b'dummy',
fragment_offset=b'dummy',
dont_fragment=b'dummy',
more_fragments=b'dummy',
ttl=b'dummy',
)
assert not p1.expecting, \
'Should not expect any more packets, but still want %r' % p1.expecting
def testMultipleSameProtos(self):
proto = rawudp.RawUDPProtocol()
p1 = MyProtocol([
(b'foobar', b'testHost', 0x43A2),
])
p2 = MyProtocol([
(b'foobar', b'testHost', 0x43A2),
])
proto.addProto(0xF00F, p1)
proto.addProto(0xF00F, p2)
proto.datagramReceived(b"\x43\xA2" #source
b"\xf0\x0f" #dest
b"\x00\x06" #len
b"\xDE\xAD" #check
b"foobar",
partial=0,
dest=b'dummy',
source=b'testHost',
protocol=b'dummy',
version=b'dummy',
ihl=b'dummy',
tos=b'dummy',
tot_len=b'dummy',
fragment_id=b'dummy',
fragment_offset=b'dummy',
dont_fragment=b'dummy',
more_fragments=b'dummy',
ttl=b'dummy',
)
assert not p1.expecting, \
'Should not expect any more packets, but still want %r' % p1.expecting
assert not p2.expecting, \
'Should not expect any more packets, but still want %r' % p2.expecting
def testWrongProtoNotSeen(self):
proto = rawudp.RawUDPProtocol()
p1 = MyProtocol([])
proto.addProto(1, p1)
proto.datagramReceived(b"\x43\xA2" #source
b"\xf0\x0f" #dest
b"\x00\x06" #len
b"\xDE\xAD" #check
b"foobar",
partial=0,
dest=b'dummy',
source=b'testHost',
protocol=b'dummy',
version=b'dummy',
ihl=b'dummy',
tos=b'dummy',
tot_len=b'dummy',
fragment_id=b'dummy',
fragment_offset=b'dummy',
dont_fragment=b'dummy',
more_fragments=b'dummy',
ttl=b'dummy',
)
def testDemuxing(self):
proto = rawudp.RawUDPProtocol()
p1 = MyProtocol([
(b'foobar', b'testHost', 0x43A2),
(b'quux', b'otherHost', 0x33FE),
])
proto.addProto(0xF00F, p1)
p2 = MyProtocol([
(b'quux', b'otherHost', 0xA401),
(b'foobar', b'testHost', 0xA302),
])
proto.addProto(0xB050, p2)
proto.datagramReceived(b"\xA4\x01" #source
b"\xB0\x50" #dest
b"\x00\x05" #len
b"\xDE\xAD" #check
b"quux",
partial=0,
dest=b'dummy',
source=b'otherHost',
protocol=b'dummy',
version=b'dummy',
ihl=b'dummy',
tos=b'dummy',
tot_len=b'dummy',
fragment_id=b'dummy',
fragment_offset=b'dummy',
dont_fragment=b'dummy',
more_fragments=b'dummy',
ttl=b'dummy',
)
proto.datagramReceived(b"\x43\xA2" #source
b"\xf0\x0f" #dest
b"\x00\x06" #len
b"\xDE\xAD" #check
b"foobar",
partial=0,
dest=b'dummy',
source=b'testHost',
protocol=b'dummy',
version=b'dummy',
ihl=b'dummy',
tos=b'dummy',
tot_len=b'dummy',
fragment_id=b'dummy',
fragment_offset=b'dummy',
dont_fragment=b'dummy',
more_fragments=b'dummy',
ttl=b'dummy',
)
proto.datagramReceived(b"\x33\xFE" #source
b"\xf0\x0f" #dest
b"\x00\x05" #len
b"\xDE\xAD" #check
b"quux",
partial=0,
dest=b'dummy',
source=b'otherHost',
protocol=b'dummy',
version=b'dummy',
ihl=b'dummy',
tos=b'dummy',
tot_len=b'dummy',
fragment_id=b'dummy',
fragment_offset=b'dummy',
dont_fragment=b'dummy',
more_fragments=b'dummy',
ttl=b'dummy',
)
proto.datagramReceived(b"\xA3\x02" #source
b"\xB0\x50" #dest
b"\x00\x06" #len
b"\xDE\xAD" #check
b"foobar",
partial=0,
dest=b'dummy',
source=b'testHost',
protocol=b'dummy',
version=b'dummy',
ihl=b'dummy',
tos=b'dummy',
tot_len=b'dummy',
fragment_id=b'dummy',
fragment_offset=b'dummy',
dont_fragment=b'dummy',
more_fragments=b'dummy',
ttl=b'dummy',
)
assert not p1.expecting, \
'Should not expect any more packets, but still want %r' % p1.expecting
assert not p2.expecting, \
'Should not expect any more packets, but still want %r' % p2.expecting
def testAddingBadProtos_WrongLevel(self):
"""Adding a wrong level protocol raises an exception."""
e = rawudp.RawUDPProtocol()
try:
e.addProto(42, "silliness")
except TypeError as e:
if e.args == ('Added protocol must be an instance of DatagramProtocol',):
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 = rawudp.RawUDPProtocol()
try:
e.addProto(-1, protocol.DatagramProtocol())
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 testAddingBadProtos_TooBig(self):
"""Adding a protocol with a number >=2**16 raises an exception."""
e = rawudp.RawUDPProtocol()
try:
e.addProto(2**16, protocol.DatagramProtocol())
except TypeError as e:
if e.args == ('Added protocol must fit in 16 bits',):
pass
else:
raise
else:
raise AssertionError('addProto must raise an exception for bad protocols')
def testAddingBadProtos_TooBig2(self):
"""Adding a protocol with a number >=2**16 raises an exception."""
e = rawudp.RawUDPProtocol()
try:
e.addProto(2**16+1, protocol.DatagramProtocol())
except TypeError as e:
if e.args == ('Added protocol must fit in 16 bits',):
pass
else:
raise
else:
raise AssertionError('addProto must raise an exception for bad protocols')
Private