Check IP whitelist on new connections

Author: alexwhitman

README.md

@@ -8,24 +8,31 @@ The server should be run on the computer with the browser that you want to use.
 
 ### Config
 
-Server config is simple, just edit server-conf.json and enter the port you want the server to listen on.
+Edit `server-conf.json` with the following options:
+
+#### `listen`
+
+The port the server will listen on.
+
+#### `sources`
+
+An array of allowed client IP addresses.
 
 ## Client
 
 The client should be run on any computer which you want to open URLs from.
 
 ### Config
 
-Client config is also simple.  Edit client-conf.json with the IP/Hostname and port of the server.
+Edit `client-conf.json` with the IP/Hostname and port of the server.
 
 ## Misc
 
 The server uses the following to open urls:
 
-- xdg-open on GNU/Linux based systems
-- explorer.exe on Windows systems
-- open on OSX systems
-
+- `xdg-open` on GNU/Linux based systems
+- `explorer.exe` on Windows systems
+- `open` on OSX systems
 
 The included `URLBridge.reg` file can be used on Windows (tested on Windows 7) to set the default browser
 to be URL-Bridge.  It assumes that URL-Bridge is located at `C:\URLBridge\` and that `nodejs.exe` is

server-conf.json

@@ -1,3 +1,4 @@
 {
-	"listen": 11223
+	"listen": 11223,
+	"sources": []
 }

server.js

@@ -16,6 +16,11 @@ fs.readFile(__dirname + '/server-conf.json', function (err, data) {
 	var config = JSON.parse(data);
 
 	var server = net.createServer(function(socket) {
+
+		if (config.sources.indexOf(socket.remoteAddress) === -1) {
+			socket.destroy();
+		}
+
 		socket.on('data', function(data) {
 			var url = data.toString()
 				.replace(/[\s\r\n]+$/, '')