Server

var packetTypes = {
    HEARTBEAT: 1,
    PLATFORM: 2
};

var platformTypes = {
    WIIU: 1,
    WII: 2,
    PC: 3
};

var time = 0;

var clients = []

var net=require("net");
net.createServer(function(socket){
    socket.on("data",function(data){
        console.log(data);
        if(data[0] == packetTypes.HEARTBEAT){
            console.log("HEARTBEAT");
            var sendBuff = new Buffer([packetTypes.HEARTBEAT, time]);
            socket.write(sendBuff);
        } else if(data[0] == packetTypes.PLATFORM){
            if(data[1] == platformTypes.WIIU){
                pltfrm = "Wii U";
            } else if(data[1] == platformTypes.WII){
                pltfrm = "Wii";
            } else if(data[1] == platformTypes.PC){
                pltfrm = "PC";
            }
            console.log("Platform: " + pltfrm);
        }
    });

    socket.on("error",function(e){
        console.log("socket error:",e);
        socket.destroy();
    });
    socket.on("disconnect",function(){
        console.log("client sent disconnect event");
        socket.destroy();
    });
    socket.on("close",function(){
        console.log("socket closed");
        socket.destroy();
    });
}).listen(11000);