How to use the minecraft-protocol.protocol function in minecraft-protocol

var protocol = require('minecraft-protocol').protocol;
var packetNames = require('./packet-names.js').packets;
var colors = require('colors');
var EventEmitter = require('events').EventEmitter;

console.log('Welcome to mincraft-sniffer, the protocol inspector');
console.log('Start your server on port 25565, and connect your client to 25566');
console.log('NOTE: this does not work with encryption. Therefore, offline mode must be enabled.');
console.log('server packets are blue'.blue + ', ' + 'client packets are green'.green);
console.log('');

var proxy = require('./proxy.js').start({
	proxyPort : 25566,
	serviceHost : 'localhost',
	servicePort : 25565
});

var mc = require('minecraft-protocol');
var states = mc.protocol.states;

var options = {
    motd: 'Bushido Studios',
    'max-players': 127,
    port: 25565,
    'online-mode': true,
};

var server = mc.createServer(options);

server.on('login', function(client) {
    broadcast(client.username+' joined the game.');
    var addr = client.socket.remoteAddress + ':' + client.socket.remotePort;
    console.log(client.username+' connected', '('+addr+')');

    client.on('end', function() {