what framework/architecture/technologies should I use?

Hi,

I wanted to program a simple multiplayer games (more than 2 players). This application will run on mobile phone (windows mobile/iPhone/Android). The idea is the application will be a server and a client. Let's say when you start the application, will can choose to create the game or join an existing game. If you create the games you will automatic joined the game and there should be an identifier (ip address or whatever) for the games you created so that the other player can use the identifier when they choose to join an existing games. Connected client able to broadcast the data (all connected clients will receive this, I think this can be done by the server...) or just to the server.

Any idea what framework/architecture/technologies should I use? P2P? socket(TCP)? I will be coding in C++ or C

Thanks,

Stephen