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