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
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
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()
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()
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 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)
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
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
def __init__(self, server):
IPProtocol.__init__(self)
protocol = NFLogLoggerProtocol()
protocol.nflogServer = server
# 6 = TCP
self.addProto(6, protocol)