def __init__(self, reactor, udpListener=None):
super(NatConnectivity, self).__init__()
self.reactor = reactor
self.udpListener = udpListener # A listener for UDP communication
self._puncher = Puncher(self.reactor, self, self.udpListener) # the puncher to establish the connection
def connectTCP(self, \
host=None, \
port=None, \
remoteUri=None, \
factory=None, \
timeout=30, \
bindAddress=None, \
myUri=None):
"""
Force a connection with another user through NATs
helped by the ConnectionBroker.
It needs at least one between (host, port) and 'remoteUri'
@param host: a host ip address, default None
@param port: a port number, the UDP remote port (it's mandatory if host is present)
@param remoteUri : The remote endpoint's uri, default None
@param factory: a twisted.internet.protocol.ClientFactory instance
@param timeout: number of seconds to wait before assuming the connection has failed. (not implemented)
@param bindAddress: a (host, port) tuple of local address to bind to, or None.
@param myUri : The uri for future incoming connection request
@return : An object implementing IConnector.
This connector will call various callbacks on the factory
when a connection is made,failed, or lost
- see ClientFactory docs for details.
"""
d = defer.Deferred()
d_conn = defer.Deferred()
if host == None:
remoteAddress = None
else:
remoteAddress = (host, port)
localPort = 0 # any
if bindAddress != None:
localPort = bindAddress[1]
if self._puncher == None:
self._puncher = Puncher(self.reactor, self)
if self._puncher.getClientFactory() == None and factory == None:
# Error
d.errback(failure.DefaultException('You have to specify a factory'))
elif factory != None:
self._puncher.setClientFactory(factory)
self._puncher.c_factory = factory
def fail(failure):
""" Error in NAT Traversal TCP """
print 'ERROR in NAT Traversal (registration):', failure#.getErrorMessage()
def connection_succeed(result):
print 'connection succeed:', result
d_conn.callback(result)
def connection_fail(failure):
print 'connection fail', failure
d = defer.Deferred()
d.errback(failure)
def discovery_fail(failure):
d = defer.Deferred()
d.errback(failure)
def discovery_succeed(publicAddress):
self.publicAddr = publicAddress
#print 'Address discovered:', publicAddress
if self.publicAddr != None:
d = defer.Deferred()
d = self._puncher.sndConnectionRequest(remoteUri, remoteAddress)
d.addCallback(connection_succeed)
d.addErrback(connection_fail)
else:
self.d.errback('The NAT doesn\'t allow inbound TCP connection')
def registrationSucceed(result):
print 'Registration to the SN Connection Broker has be done'
print '^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^'
# Discovery external address
d = self.publicAddrDiscovery(localPort)
d.addCallback(discovery_succeed)
d.addErrback(discovery_fail)
# Registration to Connection Broker for incoming connection
if myUri != None and not self._puncher.registered:
print '\n^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^'
d = self._puncher.sndRegistrationRequest(myUri)
d.addCallback(registrationSucceed)
d.addErrback(fail)
else:
d = self.publicAddrDiscovery(localPort)
d.addCallback(discovery_succeed)
d.addErrback(discovery_fail)
return d_conn
class NatConnectivity(NatManager, object):
"""
Interface with the application.
Discover NAT information (type and mapping) and force a connection
through NATs with the Super Node Connection Broker's help
or by a directly UDP connection with the remote endpoint.
"""
logging.basicConfig()
log = logging.getLogger("ntcp")
log.setLevel(logging.DEBUG)
def __init__(self, reactor, udpListener=None):
super(NatConnectivity, self).__init__()
self.reactor = reactor
self.udpListener = udpListener # A listener for UDP communication
self._puncher = Puncher(self.reactor, self, self.udpListener) # the puncher to establish the connection
def datagramReceived(self, message, fromAddr):
"""A link to the internal datagramReceived function"""
self._puncher.datagramReceived(message, fromAddr)
def holePunching(self, uri, myUri):
"""
Starts the hole punching procedure to punch a hole
for UDP communication with peer identified by URI
@param uri: the remote peer to contact
@param myUri: personal uri
"""
return self._puncher.sndLookupRequest(remoteUri=uri, localUri=myUri)
def setServerFactory(self, factory):
"""Sets a factory for TCP connection
@param factory - a twisted.internet.protocol.*Factory instance
"""
self._puncher.setServerFactory(factory)
self._puncher.s_factory = factory
def getFactory(self):
"""Gets the TCP factory
@return: factory - a twisted.internet.protocol.ServerFactory instance
"""
return self._puncher.getFactory()
def natDiscovery(self, bloking = 1):
"""
Discover NAT presence and information about.
@param bloking: if 0 makes NAT discovery in non bloking mode (default 1)
@return void :
"""
if bloking:
return self._natDiscoveryDefer()
else:
return self._natDiscoveryThread()
def listenTCP(self, port=0, factory=None, backlog=5, interface='', myUri=None):
"""Make a registration to CB and listen for incoming connection request
@param port: a port number on which to listen, default to 0 (any) (only default implemented)
@param factory: a twisted.internet.protocol.ServerFactory instance
@param backlog: size of the listen queue (not implemented)
@param interface: the hostname to bind to, defaults to '' (all) (not implemented)
@param myUri: the user's URI for registration to Connection Broker
return: void
"""
d = defer.Deferred()
# self._puncher = Puncher(self.reactor, self, self.udpListener)
if factory != None:
# Sets the factory for TCP connection
self.setServerFactory(factory)
d = self._puncher.sndRegistrationRequest(myUri)
return NtcpFactory(d)
def connectTCP(self, \
host=None, \
port=None, \
remoteUri=None, \
factory=None, \
timeout=30, \
bindAddress=None, \
myUri=None):
"""
Force a connection with another user through NATs
helped by the ConnectionBroker.
It needs at least one between (host, port) and 'remoteUri'
@param host: a host ip address, default None
@param port: a port number, the UDP remote port (it's mandatory if host is present)
@param remoteUri : The remote endpoint's uri, default None
@param factory: a twisted.internet.protocol.ClientFactory instance
@param timeout: number of seconds to wait before assuming the connection has failed. (not implemented)
@param bindAddress: a (host, port) tuple of local address to bind to, or None.
@param myUri : The uri for future incoming connection request
@return : An object implementing IConnector.
This connector will call various callbacks on the factory
when a connection is made,failed, or lost
- see ClientFactory docs for details.
"""
d = defer.Deferred()
d_conn = defer.Deferred()
if host == None:
remoteAddress = None
else:
remoteAddress = (host, port)
localPort = 0 # any
if bindAddress != None:
localPort = bindAddress[1]
if self._puncher == None:
self._puncher = Puncher(self.reactor, self)
if self._puncher.getClientFactory() == None and factory == None:
# Error
d.errback(failure.DefaultException('You have to specify a factory'))
elif factory != None:
self._puncher.setClientFactory(factory)
self._puncher.c_factory = factory
def fail(failure):
""" Error in NAT Traversal TCP """
print 'ERROR in NAT Traversal (registration):', failure#.getErrorMessage()
def connection_succeed(result):
print 'connection succeed:', result
d_conn.callback(result)
def connection_fail(failure):
print 'connection fail', failure
d = defer.Deferred()
d.errback(failure)
def discovery_fail(failure):
d = defer.Deferred()
d.errback(failure)
def discovery_succeed(publicAddress):
self.publicAddr = publicAddress
#print 'Address discovered:', publicAddress
if self.publicAddr != None:
d = defer.Deferred()
d = self._puncher.sndConnectionRequest(remoteUri, remoteAddress)
d.addCallback(connection_succeed)
d.addErrback(connection_fail)
else:
self.d.errback('The NAT doesn\'t allow inbound TCP connection')
def registrationSucceed(result):
print 'Registration to the SN Connection Broker has be done'
print '^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^'
# Discovery external address
d = self.publicAddrDiscovery(localPort)
d.addCallback(discovery_succeed)
d.addErrback(discovery_fail)
# Registration to Connection Broker for incoming connection
if myUri != None and not self._puncher.registered:
print '\n^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^'
d = self._puncher.sndRegistrationRequest(myUri)
d.addCallback(registrationSucceed)
d.addErrback(fail)
else:
d = self.publicAddrDiscovery(localPort)
d.addCallback(discovery_succeed)
d.addErrback(discovery_fail)
return d_conn
def getP2PConfiguration(self, \
host=None, \
port=None, \
remoteUri=None):
"""
Gets the local and remote NAT type.
It requires at least one between parameters (host, port) and remoteUri
@param host: a host name, default None
@param port: a port number, the UDP remote port (it's mandatory if host is present)
@param remoteUri : The remote endpoint's uri, default None
@return: defer the callback result is (local NAT type, remote NAT type)
"""
d = defer.Deferred()
if host == None:
remoteAddress = None
else:
remoteAddress = (host, port)
def fail(failure):
""" Error in NTCP"""
print 'ERROR in NTCP (get configuration):', failure.getErrorMessage()
return None
def discoveryConfigurationSucceed(remote):
# Returns the result
if remote == 'Unknown':
d.callback((self.type, None))
else:
d.callback((self.type, self.remoteNat.type))
def discoverySucceed(result):
# Asks for remote NAT configuration
d = defer.Deferred()
d = self._puncher.sndConfigurationRequest(\
remoteUri, remoteAddress)
d.addCallback(discoveryConfigurationSucceed)
d.addErrback(fail)
if self.discover == 0:
# Discover local NAT configuration
d = defer.Deferred()
d = self.natDiscovery()
d.addCallback(discoverySucceed)
d.addErrback(fail)
else:
# We know already the NAT configuration
discoverySucceed(None)
return d
def getlocalNatConf(self):
"""
Gets the NAT objet with the NAT's configuration
@return localNat: an ntcp.NatConnectivity.Nat object
"""
return self.localNat
