def __init__( self, name, parent ):
#super( MessageAdapter, self ).__init__( name, parent )
self.log = logging.getLogger( self.__class__.__name__ )
self.network = Network( 'net', self )
self.network.addListener( self )
self.coder = MessageCoder( self.query( 'network.encoding' ) )
self.default = DatagramReassembler()
self.connections = {}
def runTest( self ): packet = '' \ 'REGISTER sip:sip.example.com SIP/2.0\r\n' \ 'Via: SIP/2.0/UDP 192.168.1.1:5060;rport;branch=z9hG4bK58790139-438475846\r\n' \ 'Max-Forwards: 70\r\n' \ 'Allow: INVITE,BYE,CANCEL,ACK,INFO,PRACK,OPTIONS,SUBSCRIBE,NOTIFY,PUBLISH,MESSAGE,REFER,REGISTER,UPDATE\r\n' \ 'Supported: path,replaces,norefersub\r\n' \ 'User-Agent: IMS Phone 49\r\n' \ 'From: <sip:[email protected]>;tag=UA_58790139-438475847\r\n' \ 'To: <sip:[email protected]>\r\n' \ 'Call-ID: 58790139-438475845\r\n' \ 'CSeq: 1 REGISTER\r\n' \ 'Expires: 3600\r\n' \ 'Contact: 1<sip:[email protected]:5060;transport=udp>;expires=3600\r\n' \ 'Authorization: Digest username="******",realm="sip.example.com",nonce="",uri="sip:sip.example.com",response=""\r\n' \ 'Content-Length: 0\r\n' \ '\r\n' mc = MessageCoder() print mc.decode( packet ) print mc.encode( packet )
class MessageAdapter(object):
"""Adapts between NetEvents and MessageEvents.
Routes outgoing MessageEvents to the appropriate destination using the
the appropriate source.
"""
def __init__( self, name, parent ):
#super( MessageAdapter, self ).__init__( name, parent )
self.log = logging.getLogger( self.__class__.__name__ )
self.network = Network( 'net', self )
self.network.addListener( self )
self.coder = MessageCoder( self.query( 'network.encoding' ) )
self.default = DatagramReassembler()
self.connections = {}
def identifyEvent( self, event ):
self.log.info( str(event) )
if isinstance( event, MessageEvent ):
return event.id
elif isinstance( event, NetEvent ):
return event.id
elif isinstance( event, NetError ):
return event.id
raise SipException( '[' + str(self.name) + '] ' + 'Ignoring event ' + str(event) + '.' )
def onBind( self, event ):
# Pass through to the underlying network implementation.
self.send( event, self.network, queued=False )
def onUnbind( self, event ):
# Pass through to the underlying network implementation.
self.send( event, self.network, queued=False )
def onRxPacket( self, event ):
# Decode the message and, if the decoding succeeded, pass the MessageEvent up.
text = self.coder.decode( event.packet )
if not event.connection:
message = self.default.parse( text )
else:
#FIXME: handle KeyError.
message = self.connections[event.connection].parse( text )
if message != None:
newEvent = MessageEvent( MessageEvent.EVENT_RX, message, transport=event.transport, localAddress=event.localAddress, localPort=event.localPort, remoteAddress=event.remoteAddress, remotePort=event.remotePort, useragent=self )
self.notify( newEvent, queued=False )
event.handled = True
def __onTxPacket( self, event ):
# Determine the transport, addresses, and ports to use and adjust the
# SIP message as necessary.
self.routeMessage( event )
# Encode the message, and if the encoding succeeded, pass the NetEvent down.
text = self.coder.encode( event.message )
newEvent = NetEvent( NetEvent.EVENT_TX_PACKET, event.transport, event.localAddress, event.localPort, event.remoteAddress, event.remotePort, packet=text )
if newEvent:
self.send( newEvent, self.network, queued=False )
event.handled = True
def onTxRequest( self, event ):
self.__onTxPacket( event )
def onTxResponse( self, event ):
self.__onTxPacket( event )
def onConnected( self, event ):
print 'ccc', str(event.connection)
self.connections[event.connection] = StreamReassembler()
event.handled = True
def onDisconnected( self, event ):
#FIXME: handle KeyError.
print 'ddd', str(event.connection)
#print self.connections
del self.connections[event.connection]
event.handled = True
def onNetError( self, event ):
self.log.error( str(event) )
#FIXME: Not sure what to do with these events. Should they be sent up as-is?
# Or converted to MessageEvents?
self.notify( event, queued=False )
event.handled = True
def routeMessage( self, event ):
"""This function determines the address and port to send the message to.
For requests, this function also determines the transport, address, and port to
send the message from.
Request:
Look up Request-URI host and get remote transport, address and port.
Modify/set Contact.
Modify/set Via to local transport, address, and port.
Response:
Get the destination from the Via.
"""
#FIXME:IMPLEMENT.
pass
