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# Copyright (c) str4d <str4d@mail.i2p>
# See COPYING for details.
from builtins import range
from builtins import object
from twisted.internet.defer import Deferred
from twisted.internet.error import ConnectError, UnknownHostError
from twisted.internet.interfaces import IListeningPort
from zope.interface import implementer
from txi2p.address import I2PAddress
from txi2p.sam import constants as c
from txi2p.sam.base import (
cmpSAM,
peerSAM,
makeSAMProtocol,
SAMSender,
SAMReceiver,
SAMFactory,
)
class StreamConnectSender(SAMSender):
def sendStreamConnect(self, id, destination, port=None, localPort=None):
msg = 'STREAM CONNECT'
msg += ' ID=%s' % id
msg += ' DESTINATION=%s' % destination
msg += ' SILENT=false'
if port:
msg += ' TO_PORT=%d' % port
if localPort:
msg += ' FROM_PORT=%d' % localPort
msg += '\n'
self.transport.write(msg.encode('utf-8'))
class StreamConnectReceiver(SAMReceiver):
def command(self):
if self.factory.dest:
self.doConnect()
else:
self.sender.sendNamingLookup(self.factory.host)
self.currentRule = 'State_naming'
def postLookup(self, dest):
self.factory.dest = dest
self.doConnect()
def doConnect(self):
self.sender.sendStreamConnect(
self.factory.session.id, self.factory.dest,
self.factory.port, self.factory.localPort)
self.currentRule = 'State_connect'
def connect(self, result, message=None):
if result != c.RESULT_OK:
self.factory.resultNotOK(result, message)
return
self.factory.streamConnectionEstablished(self)
self.currentRule = 'State_readData'
StreamConnectProtocol = makeSAMProtocol(
StreamConnectSender,
StreamConnectReceiver)
class StreamConnectFactory(SAMFactory):
protocol = StreamConnectProtocol
def __init__(self, clientFactory, session, host, dest, port=None, localPort=None):
self._clientFactory = clientFactory
self.session = session
self.host = host
self.dest = dest
self.port = port
self.localPort = localPort
self.deferred = Deferred(self._cancel);
def streamConnectionEstablished(self, streamProto):
self.session.addStream(streamProto)
peerAddress = I2PAddress(self.dest, self.host, self.port)
proto = self._clientFactory.buildProtocol(peerAddress)
if proto is None:
self.deferred.cancel()
return
streamProto.wrapProto(proto, peerAddress)
self.deferred.callback(proto)
class StreamAcceptSender(SAMSender):
def sendStreamAccept(self, id):
msg = 'STREAM ACCEPT'
msg += ' ID=%s' % id
msg += ' SILENT=false'
msg += '\n'
self.transport.write(msg.encode('utf-8'))
class StreamAcceptReceiver(SAMReceiver):
peer = None
initialData = b''
def command(self):
self.sender.sendStreamAccept(
self.factory.session.id)
self.currentRule = 'State_accept'
def accept(self, result, message=None):
if result != c.RESULT_OK:
self.factory.resultNotOK(result, message)
return
self.factory.streamAcceptEstablished(self)
self.currentRule = 'State_readData'
def dataReceived(self, data):
if self.peer:
# Pass all other data to the wrapped Protocol.
self.wrappedProto.dataReceived(data)
else:
self.initialData += data
if b'\n' in self.initialData:
# First line is the peer's Destination.
data, self.initialData = self.initialData.split(b'\n', 1)
self.peer = peerSAM(data)
# Create the wrapped Protocol...
self.factory.streamAcceptIncoming(self)
# ... and pass through any initial data.
if self.initialData:
data, self.initialData = self.initialData, None
self.wrappedProto.dataReceived(data)
StreamAcceptProtocol = makeSAMProtocol(
StreamAcceptSender,
StreamAcceptReceiver)
class StreamAcceptFactory(SAMFactory):
protocol = StreamAcceptProtocol
def __init__(self, clientFactory, session, listeningPort):
self._clientFactory = clientFactory
self.session = session
self.listeningPort = listeningPort
self.deferred = Deferred(self._cancel);
def streamAcceptEstablished(self, streamProto):
self.session.addStream(streamProto)
self.listeningPort.addAccept(streamProto)
def streamAcceptIncoming(self, streamProto):
self.listeningPort.removeAccept(streamProto)
proto = self._clientFactory.buildProtocol(streamProto.peer)
if proto is None:
self.deferred.cancel()
return
streamProto.wrapProto(proto, streamProto.peer, True)
@implementer(IListeningPort)
class StreamAcceptPort(object):
def __init__(self, session, factory):
self.session = session
self.factory = StreamAcceptFactory(factory, session, self)
self.accepts = []
def startListening(self):
if cmpSAM(self.session.samVersion, '3.2') >= 0:
active = 8
else:
active = 1
for i in range(0, active):
self.openAccept()
def stopListening(self):
for pending in self.accepts:
pending.sender.transport.loseConnection()
self.accepts = []
def openAccept(self):
self.session.samEndpoint.connect(self.factory)
def addAccept(self, proto):
self.accepts.append(proto)
def removeAccept(self, proto):
self.accepts.remove(proto)
self.openAccept()
def getHost(self):
return self.session.address
class StreamForwardSender(SAMSender):
def sendStreamForward(self, id, port, host=None):
msg = 'STREAM FORWARD'
msg += ' ID=%s' % id
msg += ' PORT=%s' % port
if host:
msg += ' HOST=%s' % host
msg += ' SILENT=false'
msg += '\n'
self.transport.write(msg.encode('utf-8'))
class StreamForwardReceiver(SAMReceiver):
def command(self):
self.sender.sendStreamForward(
self.factory.session.id,
self.factory.forwardPort)
self.currentRule = 'State_forward'
def forward(self, result, message=None):
if result != c.RESULT_OK:
self.factory.resultNotOK(result, message)
return
self.factory.streamForwardEstablished(self)
StreamForwardProtocol = makeSAMProtocol(
StreamForwardSender,
StreamForwardReceiver)
class StreamForwardFactory(SAMFactory):
protocol = StreamForwardProtocol
def __init__(self, session, forwardPort):
self.session = session
self.forwardPort = forwardPort
self.deferred = Deferred(self._cancel);
def streamForwardEstablished(self, forwardingProto):
self.session.addStream(forwardingProto)
self.deferred.callback(forwardingProto)
@implementer(IListeningPort)
class StreamForwardPort(object):
def __init__(self, listeningPort, forwardingProto, serverAddr):
self._listeningPort = listeningPort
self._forwardingProto = forwardingProto
self._serverAddr = serverAddr
def startListening(self):
self._listeningPort.startListening()
def stopListening(self):
self._listeningPort.stopListening()
self._forwardingProto.sender.transport.loseConnection()
def getHost(self):
return self._serverAddr
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