howto mix gtk and network

[Alexander Nagel <feuerschwanz76 web de>]

Hi,
i plan to program a little game which also should playable over network
and i need a some ideas for the beginning.
I know the network basics.
For example at the start of the game one player act as a server chooses
the map and the number of max. players and other players can join.
(Like in C&C Generals or HW2)
So what i need is a function which polls regularly every 0.5 second or so
at the given port.

Any ideas are welcome

Alex