Lan Broadcast

I have got the free license of unity and i want to make a small multiplayer game for android devices. Two devices in same network. So i know with with system.net.sockets it is possible to broadcast the ip from one device to others--> other stuff then with the network build in. But the problem is that unity android free does not support system.net.sockets. Is there any other way to broadcast something like a string(=ipAdress).

Thanks in advance!;)

Edit: Unity 5 solved all my problems!;)