131 lines
4.6 KiB
Python
131 lines
4.6 KiB
Python
###############################################################################
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#
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# The MIT License (MIT)
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#
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# Copyright (c) Crossbar.io Technologies GmbH
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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# THE SOFTWARE.
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#
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###############################################################################
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from __future__ import absolute_import
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import txaio
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txaio.use_twisted()
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from twisted.python import usage
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from twisted.internet.defer import inlineCallbacks
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from twisted.internet.protocol import Factory, Protocol
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from twisted.internet.endpoints import clientFromString, serverFromString
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from twisted.application import service
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class DestEndpointForwardingProtocol(Protocol):
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log = txaio.make_logger()
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def connectionMade(self):
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self.log.debug("DestEndpointForwardingProtocol.connectionMade")
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pass
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def dataReceived(self, data):
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self.log.debug(
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"DestEndpointForwardingProtocol.dataReceived: {data}",
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data=data,
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)
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if self.factory._sourceProtocol:
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self.factory._sourceProtocol.transport.write(data)
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def connectionLost(self, reason):
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self.log.debug("DestEndpointForwardingProtocol.connectionLost")
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if self.factory._sourceProtocol:
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self.factory._sourceProtocol.transport.loseConnection()
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class DestEndpointForwardingFactory(Factory):
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def __init__(self, sourceProtocol):
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self._sourceProtocol = sourceProtocol
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self._proto = None
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def buildProtocol(self, addr):
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self._proto = DestEndpointForwardingProtocol()
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self._proto.factory = self
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return self._proto
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class EndpointForwardingProtocol(Protocol):
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log = txaio.make_logger()
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@inlineCallbacks
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def connectionMade(self):
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self.log.debug("EndpointForwardingProtocol.connectionMade")
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self._destFactory = DestEndpointForwardingFactory(self)
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self._destEndpoint = clientFromString(self.factory.service._reactor,
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self.factory.service._destEndpointDescriptor)
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self._destEndpointPort = yield self._destEndpoint.connect(self._destFactory)
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def dataReceived(self, data):
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self.log.debug(
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"EndpointForwardingProtocol.dataReceived: {data}",
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data=data,
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)
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if self._destFactory._proto:
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self._destFactory._proto.transport.write(data)
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def connectionLost(self, reason):
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self.log.debug("EndpointForwardingProtocol.connectionLost")
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if self._destFactory._proto:
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self._destFactory._proto.transport.loseConnection()
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class EndpointForwardingService(service.Service):
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def __init__(self, endpointDescriptor, destEndpointDescriptor, reactor=None):
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if reactor is None:
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from twisted.internet import reactor
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self._reactor = reactor
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self._endpointDescriptor = endpointDescriptor
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self._destEndpointDescriptor = destEndpointDescriptor
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@inlineCallbacks
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def startService(self):
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factory = Factory.forProtocol(EndpointForwardingProtocol)
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factory.service = self
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self._endpoint = serverFromString(self._reactor, self._endpointDescriptor)
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self._endpointPort = yield self._endpoint.listen(factory)
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def stopService(self):
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return self._endpointPort.stopListening()
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class Options(usage.Options):
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synopsis = "[options]"
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longdesc = 'Endpoint Forwarder.'
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optParameters = [
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["endpoint", "e", None, "Source endpoint."],
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["dest_endpoint", "d", None, "Destination endpoint."]
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]
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def makeService(config):
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service = EndpointForwardingService(config['endpoint'], config['dest_endpoint'])
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return service
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