From 58b38d1cefa6647863bab0a3eae8740c2db676ce Mon Sep 17 00:00:00 2001
From: Darren <darren@darrenwhitlen.com>
Date: Wed, 25 Jun 2014 09:49:54 +0100
Subject: [PATCH] Open proxy checker module

---
 server_modules/proxychecker.js | 67 ++++++++++++++++++++++++++++++++++
 1 file changed, 67 insertions(+)
 create mode 100644 server_modules/proxychecker.js

diff --git a/server_modules/proxychecker.js b/server_modules/proxychecker.js
new file mode 100644
index 0000000..f16eccf
--- /dev/null
+++ b/server_modules/proxychecker.js
@@ -0,0 +1,67 @@
+var util = require('util'),
+    kiwiModules = require('../server/modules');
+
+
+var module = new kiwiModules.Module('proxychecker');
+
+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, host, port) {
+        if (is_proxy) {
+            var err = new Error(util.format('Proxy detected on %s:%d', client_addr, port));
+            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 = [80,8080,81,1080,6588,8000];
+    var ports_completed = 0;
+
+    var callback_called = false;
+
+    var portFailed = function() {
+        ports_completed++;
+        this.removeAllListeners();
+        this.destroy();
+
+        if (!callback_called && ports_completed >= ports.length) {
+            callback_called = true;
+            callback(false);
+        }
+    };
+
+    var portConnected = function() {
+        var remote_port = this.remotePort;
+
+        ports_completed++;
+        this.removeAllListeners();
+        this.destroy();
+
+        if (!callback_called) {
+            callback_called = true;
+            callback(true, host, remote_port);
+        }
+    };
+
+    for (var idx=0; idx< ports.length; idx++) {
+        net.connect({port: ports[idx], host: host})
+            .on('connect', portConnected)
+            .on('error', portFailed)
+            .on('close', portFailed);
+    }
+}
\ No newline at end of file
-- 
2.25.1