added the validation code from plasticfantastic.com

validation/nodejs/db.php

@@ -0,0 +1,4 @@
+<?php
+$con=mysql_connect("localhost","USERNAME","PASSWORD") or die ('I cannot connect to the database because: ' . mysql_error());
+mysql_select_db("plast19_nodejs");
+?>

validation/nodejs/scrCreateServer.php

@@ -0,0 +1,24 @@
+<?php
+include "db.php";
+
+$externalIP=$_SERVER['REMOTE_ADDR'];
+$internalIP=$_GET['ip'];
+$port=$_GET['port'];
+
+$sql=mysql_query("
+DELETE FROM servers
+WHERE externalIP='$externalIP'
+");
+
+$sql=mysql_query("
+INSERT INTO servers
+(externalIP,internalIP,port)
+VALUES
+('$externalIP','$internalIP','$port')
+");
+
+if(!$sql){echo "0"; exit();}
+
+echo "1";
+
+?>

validation/nodejs/scrJoinServer.php

@@ -0,0 +1,15 @@
+<?php
+
+include "db.php";
+
+$externalIP=$_SERVER['REMOTE_ADDR'];
+
+$sql=mysql_query("SELECT internalIP,port FROM servers WHERE externalIP='$externalIP'");
+
+if(mysql_num_rows($sql)==0){echo "0"; exit();}
+
+$row=mysql_fetch_array($sql);
+
+echo $row[internalIP] . "," . $row[port];
+
+?>

validation/servers.sql

@@ -0,0 +1,37 @@
+-- phpMyAdmin SQL Dump
+-- version 3.4.4
+-- http://www.phpmyadmin.net
+--
+-- Host: localhost
+-- Generation Time: Sep 21, 2011 at 09:12 AM
+-- Server version: 5.1.54
+-- PHP Version: 5.2.6
+
+SET SQL_MODE="NO_AUTO_VALUE_ON_ZERO";
+SET time_zone = "+00:00";
+
+
+/*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */;
+/*!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS */;
+/*!40101 SET @OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION */;
+/*!40101 SET NAMES utf8 */;
+
+--
+-- Database: `plast19_nodejs`
+--
+
+-- --------------------------------------------------------
+
+--
+-- Table structure for table `servers`
+--
+
+CREATE TABLE IF NOT EXISTS `servers` (
+  `externalIP` varchar(15) NOT NULL,
+  `internalIP` varchar(15) NOT NULL,
+  `port` int(5) NOT NULL
+) ENGINE=MyISAM DEFAULT CHARSET=latin1;
+
+/*!40101 SET CHARACTER_SET_CLIENT=@OLD_CHARACTER_SET_CLIENT */;
+/*!40101 SET CHARACTER_SET_RESULTS=@OLD_CHARACTER_SET_RESULTS */;
+/*!40101 SET COLLATION_CONNECTION=@OLD_COLLATION_CONNECTION */;