[Twisted-Python] Communicating between listeners

[tom dyson]

I'm new to Twisted, and network programming in general. Can anyone 
provide an example that might help me code the following functionality:

* Server listens on two ports, one TCP, one UDP
* Incoming UDP datagrams contain an identifying string
* A message is broadcast to all connected TCP clients whose username 
matches the UDP ID.

In particular, I can't work out how to access details of the current 
TCP clients - and trigger a new message to some of them - from the UDP 
listener.

Many thanks

Tom

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tom dyson
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