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<?php
/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
/**
* DNS Library for handling lookups and updates.
*
* PHP Version 5
*
* Copyright (c) 2010, Mike Pultz <mike@mikepultz.com>.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* * Neither the name of Mike Pultz nor the names of his contributors
* may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRIC
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* @category Networking
* @package Net_DNS2
* @author Mike Pultz <mike@mikepultz.com>
* @copyright 2010 Mike Pultz <mike@mikepultz.com>
* @license http://www.opensource.org/licenses/bsd-license.php BSD License
* @version SVN: $Id: Socket.php 47 2010-10-24 23:53:08Z mike.pultz $
* @link http://pear.php.net/package/Net_DNS2
* @since File available since Release 0.6.0
*
*/
/**
* This is the abstract base class for the two sockets classes; this simply
* provides the class definition for the two sockets classes.
*
* @category Networking
* @package Net_DNS2
* @author Mike Pultz <mike@mikepultz.com>
* @license http://www.opensource.org/licenses/bsd-license.php BSD License
* @link http://pear.php.net/package/Net_DNS2
* @see Net_DNS2_Socket_Sockets, Net_DNS2_Socket_Streams
*
*/
abstract class Net_DNS2_Socket
{
private $_sock;
protected $type;
protected $host;
protected $port;
protected $timeout;
protected $local_host;
protected $local_port;
public $last_error;
/**
* constructor - set the port details
*
* @param integer $type the socket type
* @param string $host the IP address of the DNS server to connect to
* @param integer $port the port of the DNS server to connect to
* @param integer $timeout the timeout value to use for socket functions
*
* @access public
*
*/
public function __construct($type, $host, $port, $timeout)
{
$this->type = $type;
$this->host = $host;
$this->port = $port;
$this->timeout = $timeout;
}
/**
* destructor
*
* @access public
*/
public function __destruct()
{
$this->close();
}
/**
* sets the local address/port for the socket to bind to
*
* @param string $address the local IP address to bind to
* @param mixed $port the local port to bind to, or 0 to let the socket
* function select a port
*
* @return boolean
* @access public
*
*/
public function bindAddress($address, $port = 0)
{
$this->local_host = $address;
$this->local_port = $port;
return true;
}
/**
* opens a socket connection to the DNS server
*
* @return boolean
* @access public
*
*/
abstract public function open();
/**
* closes a socket connection to the DNS server
*
* @return boolean
* @access public
*
*/
abstract public function close();
/**
* writes the given string to the DNS server socket
*
* @param string $data a binary packed DNS packet
*
* @return boolean
* @access public
*
*/
abstract public function write($data);
/**
* reads a response from a DNS server
*
* @param integer &$size the size of the DNS packet read is passed back
*
* @return mixed returns the data on success and false on error
* @access public
*
*/
abstract public function read(&$size);
}
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* c-hanging-comment-ender-p: nil
* End:
*/
?>
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