def createFastPathLayer(self, mode: ParserMode) -> FastPathLayer:
"""
Create a fast-path layer.
:param mode: the mode of the layer (client or server)
"""
parser = createFastPathParser(self.useTLS, self.securitySettings.encryptionMethod, self.crypters[mode], mode)
return FastPathLayer(parser)
def buildIOChannel(self, mcs: MCSLayer, userID: int,
channelID: int) -> MCSServerChannel:
encryptionMethod = self.serverData.security.encryptionMethod
self.securityLayer = self.createSecurityLayer()
self.securityLayer.createObserver(
onClientInfoReceived=self.onClientInfoReceived,
onSecurityExchangeReceived=self.onSecurityExchangeReceived,
onLicensingDataReceived=self.onLicensingDataReceived)
slowPathObserver = MITMSlowPathObserver(
self.log, self.slowPathLayer, onConfirmActive=self.onConfirmActive)
slowPathObserver.setDataHandler(SlowPathDataType.PDUTYPE2_INPUT,
self.onInputPDUReceived)
clientObserver = self.client.getChannelObserver(channelID)
slowPathObserver.setPeer(clientObserver)
self.slowPathLayer.addObserver(slowPathObserver)
self.slowPathLayer.addObserver(RecordingSlowPathObserver(
self.recorder))
fastPathParser = createFastPathParser(self.useTLS, encryptionMethod,
self.crypter, ParserMode.SERVER)
self.fastPathLayer = FastPathLayer(fastPathParser)
fastPathObserver = MITMFastPathObserver(self.log, self.fastPathLayer)
fastPathObserver.setPeer(self.client.getFastPathObserver())
self.fastPathLayer.addObserver(fastPathObserver)
self.fastPathLayer.addObserver(
RecordingFastPathObserver(self.recorder,
PlayerMessageType.FAST_PATH_INPUT))
channel = MCSServerChannel(mcs, userID, channelID)
Layer.chain(channel, self.securityLayer, self.slowPathLayer)
self.segmentation.attachLayer(SegmentationPDUType.FAST_PATH,
self.fastPathLayer)
if self.useTLS:
self.securityLayer.securityHeaderExpected = True
return channel
def buildIOChannel(self, mcs: MCSLayer, userID: int,
channelID: int) -> MCSClientChannel:
encryptionMethod = self.serverData.security.encryptionMethod
self.securityLayer = self.createSecurityLayer()
self.securityLayer.createObserver(
onLicensingDataReceived=self.onLicensingDataReceived)
slowPathObserver = MITMSlowPathObserver(self.log, self.slowPathLayer)
self.slowPathLayer.addObserver(slowPathObserver)
self.slowPathLayer.addObserver(RecordingSlowPathObserver(
self.recorder))
self.channelObservers[channelID] = slowPathObserver
fastPathParser = createFastPathParser(self.useTLS, encryptionMethod,
self.crypter, ParserMode.CLIENT)
self.fastPathLayer = FastPathLayer(fastPathParser)
self.fastPathObserver = MITMFastPathObserver(self.log,
self.fastPathLayer)
self.fastPathLayer.addObserver(self.fastPathObserver)
self.fastPathLayer.addObserver(
RecordingFastPathObserver(self.recorder,
PlayerMessageType.FAST_PATH_OUTPUT))
channel = MCSClientChannel(mcs, userID, channelID)
Layer.chain(channel, self.securityLayer, self.slowPathLayer)
self.segmentation.attachLayer(SegmentationPDUType.FAST_PATH,
self.fastPathLayer)
if self.useTLS:
self.securityLayer.securityHeaderExpected = True
elif encryptionMethod != 0:
self.log.debug("Sending Security Exchange")
self.slowPathLayer.previous.sendSecurityExchange(
self.securitySettings.encryptClientRandom())
return channel
