phpsocks5/Workerman/Protocols/Frame.php

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2016-09-20 21:27:41 +08:00
<?php
/**
* This file is part of workerman.
*
* Licensed under The MIT License
* For full copyright and license information, please see the MIT-LICENSE.txt
* Redistributions of files must retain the above copyright notice.
*
* @author walkor<walkor@workerman.net>
* @copyright walkor<walkor@workerman.net>
* @link http://www.workerman.net/
* @license http://www.opensource.org/licenses/mit-license.php MIT License
*/
namespace Workerman\Protocols;
use Workerman\Connection\TcpConnection;
/**
* Frame Protocol.
*/
class Frame
{
/**
* Check the integrity of the package.
*
* @param string $buffer
* @param TcpConnection $connection
* @return int
*/
public static function input($buffer, TcpConnection $connection)
{
if (strlen($buffer) < 4) {
return 0;
}
$unpack_data = unpack('Ntotal_length', $buffer);
return $unpack_data['total_length'];
}
/**
* Decode.
*
* @param string $buffer
* @return string
*/
public static function decode($buffer)
{
return substr($buffer, 4);
}
/**
* Encode.
*
* @param string $buffer
* @return string
*/
public static function encode($buffer)
{
$total_length = 4 + strlen($buffer);
return pack('N', $total_length) . $buffer;
}
}