--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/web/Zend/TimeSync/Sntp.php	Mon Dec 13 18:29:26 2010 +0100
@@ -0,0 +1,119 @@
+<?php
+/**
+ * Zend Framework
+ *
+ * LICENSE
+ *
+ * This source file is subject to the new BSD license that is bundled
+ * with this package in the file LICENSE.txt.
+ * It is also available through the world-wide-web at this URL:
+ * http://framework.zend.com/license/new-bsd
+ * If you did not receive a copy of the license and are unable to
+ * obtain it through the world-wide-web, please send an email
+ * to license@zend.com so we can send you a copy immediately.
+ *
+ * @category  Zend
+ * @package   Zend_TimeSync
+ * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license   http://framework.zend.com/license/new-bsd     New BSD License
+ * @version   $Id: Sntp.php 20096 2010-01-06 02:05:09Z bkarwin $
+ */
+
+/**
+ * Zend_TimeSync_Protocol
+ */
+require_once 'Zend/TimeSync/Protocol.php';
+
+/**
+ * SNTP Protocol handling class
+ *
+ * @category  Zend
+ * @package   Zend_TimeSync
+ * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license   http://framework.zend.com/license/new-bsd     New BSD License
+ */
+class Zend_TimeSync_Sntp extends Zend_TimeSync_Protocol
+{
+    /**
+     * Port number for this timeserver
+     *
+     * @var integer
+     */
+    protected $_port = 37;
+
+    /**
+     * Socket delay
+     *
+     * @var integer
+     */
+    private $_delay;
+
+    /**
+     * Class constructor, sets the timeserver and port number
+     *
+     * @param string  $timeserver Timeserver to connect to
+     * @param integer $port       Port of the timeserver when it differs from the default port
+     */
+    public function __construct($timeserver, $port)
+    {
+        $this->_timeserver = 'udp://' . $timeserver;
+        if ($port !== null) {
+            $this->_port = $port;
+        }
+    }
+
+    /**
+     * Prepares the data that will be send to the timeserver
+     *
+     * @return array
+     */
+    protected function _prepare()
+    {
+        return "\n";
+    }
+
+    /**
+     * Reads the data returned from the timeserver
+     *
+     * @return string
+     */
+    protected function _read()
+    {
+        $result       = fread($this->_socket, 49);
+        $this->_delay = (($this->_delay - time()) / 2);
+
+        return $result;
+    }
+
+    /**
+     * Writes data to to the timeserver
+     *
+     * @param  string $data Data to write to the timeserver
+     * @return void
+     */
+    protected function _write($data)
+    {
+        $this->_connect();
+        $this->_delay = time();
+        fputs($this->_socket, $data);
+    }
+
+    /**
+     * Extracts the data returned from the timeserver
+     *
+     * @param  string $result Data to extract
+     * @return integer
+     */
+    protected function _extract($result)
+    {
+        $dec   = hexdec('7fffffff');
+        $time  = abs(($dec - hexdec(bin2hex($result))) - $dec);
+        $time -= 2208988800;
+        // Socket delay
+        $time -= $this->_delay;
+
+        $this->_info['offset'] = $this->_delay;
+
+        return $time;
+    }
+}