Пример #1
0
    def parser(self):
        """
        Get a function for parsing a datagram read from a I{tun} device.

        @return: A function which accepts a datagram exactly as might be read
            from a I{tun} device.  The datagram is expected to ultimately carry
            a UDP datagram.  When called, it returns a L{list} of L{tuple}s.
            Each tuple has the UDP application data as the first element and
            the sender address as the second element.
        """
        datagrams = []
        receiver = DatagramProtocol()

        def capture(*args):
            datagrams.append(args)

        receiver.datagramReceived = capture

        udp = RawUDPProtocol()
        udp.addProto(12345, receiver)

        ip = IPProtocol()
        ip.addProto(17, udp)

        def parse(data):
            # TUN devices omit the ethernet framing so we can start parsing
            # right at the IP layer.
            ip.datagramReceived(data, False, None, None, None)
            return datagrams

        return parse
Пример #2
0
    def parser(self):
        """
        Get a function for parsing a datagram read from a I{tun} device.

        @return: A function which accepts a datagram exactly as might be read
            from a I{tun} device.  The datagram is expected to ultimately carry
            a UDP datagram.  When called, it returns a L{list} of L{tuple}s.
            Each tuple has the UDP application data as the first element and
            the sender address as the second element.
        """
        datagrams = []
        receiver = DatagramProtocol()

        def capture(*args):
            datagrams.append(args)

        receiver.datagramReceived = capture

        udp = RawUDPProtocol()
        udp.addProto(12345, receiver)

        ip = IPProtocol()
        ip.addProto(17, udp)

        def parse(data):
            # TUN devices omit the ethernet framing so we can start parsing
            # right at the IP layer.
            ip.datagramReceived(data, False, None, None, None)
            return datagrams

        return parse
Пример #3
0
def main(reactor):
    startLogging(stdout, setStdout=False)
    udp = RawUDPProtocol()
    udp.addProto(42, MyProto())
    ip = IPProtocol()
    ip.addProto(17, udp)
    eth = EthernetProtocol()
    eth.addProto(0x800, ip)

    port = TuntapPort(interface='tap0', proto=eth, reactor=reactor)
    port.startListening()

    # Run forever
    return Deferred()
Пример #4
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def main(reactor):
    startLogging(stdout, setStdout=False)
    udp = RawUDPProtocol()
    udp.addProto(42, MyProto())
    ip = IPProtocol()
    ip.addProto(17, udp)
    eth = EthernetProtocol()
    eth.addProto(0x800, ip)

    port = TuntapPort(interface='tap0', proto=eth, reactor=reactor)
    port.startListening()

    # Run forever
    return Deferred()
Пример #5
0
    def recv(self, nbytes):
        """
        Receive a datagram sent to this port using the L{MemoryIOSystem} which
        created this object.

        This behaves like L{socket.socket.recv} but the data being I{sent} and
        I{received} only passes through various memory buffers managed by this
        object and L{MemoryIOSystem}.

        @see: L{socket.socket.recv}
        """
        data = self._system._openFiles[self._fileno].writeBuffer.popleft()

        datagrams = []
        receiver = DatagramProtocol()

        def capture(datagram, address):
            datagrams.append(datagram)

        receiver.datagramReceived = capture

        udp = RawUDPProtocol()
        udp.addProto(12345, receiver)

        ip = IPProtocol()
        ip.addProto(17, udp)

        mode = self._system._openFiles[self._fileno].tunnelMode
        if (mode & TunnelFlags.IFF_TAP.value):
            ether = EthernetProtocol()
            ether.addProto(0x800, ip)
            datagramReceived = ether.datagramReceived
        else:
            datagramReceived = lambda data: ip.datagramReceived(
                data, None, None, None, None)

        dataHasPI = not (mode & TunnelFlags.IFF_NO_PI.value)

        if dataHasPI:
            # datagramReceived can't handle the PI, get rid of it.
            data = data[_PI_SIZE:]

        datagramReceived(data)
        return datagrams[0][:nbytes]
Пример #6
0
    def recv(self, nbytes):
        """
        Receive a datagram sent to this port using the L{MemoryIOSystem} which
        created this object.

        This behaves like L{socket.socket.recv} but the data being I{sent} and
        I{received} only passes through various memory buffers managed by this
        object and L{MemoryIOSystem}.

        @see: L{socket.socket.recv}
        """
        data = self._system._openFiles[self._fileno].writeBuffer.popleft()

        datagrams = []
        receiver = DatagramProtocol()

        def capture(datagram, address):
            datagrams.append(datagram)

        receiver.datagramReceived = capture

        udp = RawUDPProtocol()
        udp.addProto(12345, receiver)

        ip = IPProtocol()
        ip.addProto(17, udp)

        mode = self._system._openFiles[self._fileno].tunnelMode
        if (mode & TunnelFlags.IFF_TAP.value):
            ether = EthernetProtocol()
            ether.addProto(0x800, ip)
            datagramReceived = ether.datagramReceived
        else:
            datagramReceived = lambda data: ip.datagramReceived(
                data, None, None, None, None)

        dataHasPI = not (mode & TunnelFlags.IFF_NO_PI.value)

        if dataHasPI:
            # datagramReceived can't handle the PI, get rid of it.
            data = data[_PI_SIZE:]

        datagramReceived(data)
        return datagrams[0][:nbytes]
def main():
    # Unbuffered mode makes it possible to do things like tail the log and
    # get semi-realtime results.  It should also prevent any lines from
    # being written non-atomically (if partial lines get written there will
    # be some mild corruption in the file).  This depends on the code using
    # self._log writing complete lines, of course.
    log = fdopen(1, "at", 0)
    tcp = RawTCPProtocol(log)

    ipv4 = IPProtocol()
    ipv4.addProto(6, tcp)

    protocol = EthernetProtocol()
    protocol.addProto(0x800, ipv4)

    s = socket(AF_PACKET, SOCK_RAW, htons(ETH_P_ALL))
    while True:
        data = s.recv(2 ** 16)
        protocol.datagramReceived(data)
Пример #8
0
    def parser(self):
        """
        Get a function for parsing a datagram read from a I{tap} device.

        @return: A function which accepts a datagram exactly as might be read
            from a I{tap} device.  The datagram is expected to ultimately carry
            a UDP datagram.  When called, it returns a L{list} of L{tuple}s.
            Each tuple has the UDP application data as the first element and
            the sender address as the second element.
        """
        datagrams = []
        receiver = DatagramProtocol()

        def capture(*args):
            datagrams.append(args)

        receiver.datagramReceived = capture

        udp = RawUDPProtocol()
        udp.addProto(12345, receiver)

        ip = IPProtocol()
        ip.addProto(17, udp)

        ether = EthernetProtocol()
        ether.addProto(0x800, ip)

        def parser(datagram):
            # TAP devices might include a PI header.  Strip that off if we
            # expect it to be there.
            if self.pi:
                datagram = datagram[_PI_SIZE:]

            # TAP devices include ethernet framing so start parsing at the
            # ethernet layer.
            ether.datagramReceived(datagram)
            return datagrams

        return parser
Пример #9
0
    def parser(self):
        """
        Get a function for parsing a datagram read from a I{tap} device.

        @return: A function which accepts a datagram exactly as might be read
            from a I{tap} device.  The datagram is expected to ultimately carry
            a UDP datagram.  When called, it returns a L{list} of L{tuple}s.
            Each tuple has the UDP application data as the first element and
            the sender address as the second element.
        """
        datagrams = []
        receiver = DatagramProtocol()

        def capture(*args):
            datagrams.append(args)

        receiver.datagramReceived = capture

        udp = RawUDPProtocol()
        udp.addProto(12345, receiver)

        ip = IPProtocol()
        ip.addProto(17, udp)

        ether = EthernetProtocol()
        ether.addProto(0x800, ip)

        def parser(datagram):
            # TAP devices might include a PI header.  Strip that off if we
            # expect it to be there.
            if self.pi:
                datagram = datagram[_PI_SIZE:]

            # TAP devices include ethernet framing so start parsing at the
            # ethernet layer.
            ether.datagramReceived(datagram)
            return datagrams

        return parser
Пример #10
0
 def __init__(self, server):
     IPProtocol.__init__(self)
     protocol = NFLogLoggerProtocol()
     protocol.nflogServer = server
     # 6 = TCP
     self.addProto(6, protocol)