chatServer.js

var net = require('net')

var chatServer = net.createServer(),
    clientList = []

chatServer.on('connection', function(client) {
    client.name = client.remoteAddress + ':' + client.remotePort
    client.write('Hi ' + client.name + '!\n');
    console.log(client.name + ' joined')

    clientList.push(client)

    client.on('data', function(data) {
    	broadcast(data, client)
    })

    client.on('end', function(data) {
        console.log(client.name + ' quit')
        clientList.splice(clientList.indexOf(client), 1)
    })

    client.on('error', function(e) {
        console.log(e)
    })

})

function broadcast(message, client) {
    for(var i=0;i<clientList.length;i+=1) {
        if(client !== clientList[i]) {
            if(clientList[i].writable) {
                clientList[i].write(client.name + " says " + message)
            } else {
                cleanup.push(clientList[i])
                clientList[i].destroy()
            }
        }
    }
}

chatServer.listen(9000)