'Deliver some data to a L{TuntapPort} hooked up to an application
protocol that raises an exception from its C{datagramReceived} method.
@return: Whatever L{AttributeError} exceptions are logged.'

def _datagramReceivedException(self):

    self.port.startListening()
    self.system.getTunnel(self.port).readBuffer.append('ping')
    self.protocol.received = None
    self.port.doRead()
    return self.flushLoggedErrors(AttributeError)
