gistfile1.js

var kiwiModules = require('../server/modules');


var module = new kiwiModules.Module('proxy_checker');

module.on('irc connecting', function (event, event_data) {
    event.wait = true;

    var client_addr = event_data.connection.state.client.websocket.meta.real_address;

    checkForOpenProxies(client_addr, function(is_proxy) {
        if (is_proxy) {
            var err = new Error('Proxy detected (' + client_addr + ')');
            err.code = 'Blocked proxy';

            event_data.connection.emit('error', err);
            event.preventDefault();
            event.callback();

        } else {
            event.callback();
        }
    });
});



function checkForOpenProxies(host, callback) {
	var net = require('net');

	var ports = [8080,80,81,1080,6588,8000];
	var ports_completed = 0;

	var portFailed = function() {
		ports_completed++;
		this.removeAllListeners();

		if (ports_completed >= ports.length)
			callback(false);
	};

	var portConnected = function() {
		ports_completed++;
		this.removeAllListeners();

		callback(true);
	};

	for (var idx=0; idx< ports.length; idx++) {
		net.connect({port: ports[idx], host: host})
			.on('connect', portConnected)
			.on('error', portFailed)
			.on('close', portFailed);
	}
}