proxy.php
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<?php
/**
* $Id:$
*
* KnowledgeTree Open Source Edition
* Document Management Made Simple
* Copyright (C) 2004 - 2007 The Jam Warehouse Software (Pty) Limited
*
* This program is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License version 3 as published by the
* Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* You can contact The Jam Warehouse Software (Pty) Limited, Unit 1, Tramber Place,
* Blake Street, Observatory, 7925 South Africa. or email info@knowledgetree.com.
*
* The interactive user interfaces in modified source and object code versions
* of this program must display Appropriate Legal Notices, as required under
* Section 5 of the GNU General Public License version 3.
*
* In accordance with Section 7(b) of the GNU General Public License version 3,
* these Appropriate Legal Notices must retain the display of the "Powered by
* KnowledgeTree" logo and retain the original copyright notice. If the display of the
* logo is not reasonably feasible for technical reasons, the Appropriate Legal Notices
* must display the words "Powered by KnowledgeTree" and retain the original
* copyright notice.
* Contributor( s): ______________________________________
*
*/
set_time_limit(0);
if ($argc < 3)
{
die('Usage: proxy.php listenport connectaddr connectport');
}
$cport = $argv[1];
$saddress = $argv[2];
$sport = $argv[2];
print "Listening on port: $cport\n";
print "Connecting to: $saddress:$sport\n";
if (($lsock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)) === false)
{
die('Cannot create socket: '. socket_strerror($res));
}
if (($res = @socket_bind($lsock, '127.0.0.2', $cport)) === false)
{
die('Cannot bind socket: ' . socket_strerror($res));
}
if (($res = socket_listen($lsock, 5)) === false)
{
die('Cannot listen on socket: ' . socket_strerror($res));
}
while(true)
{
if (($csock = socket_accept($lsock)) < 0)
{
print 'Cannot accept socket: ' . socket_strerror($csock) . "\n";
continue;
}
print "accepting client\n";
if (($ssock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)) < 0)
{
print('Cannot create socket: '. socket_strerror($res));
continue;
}
print "connecting\n";
if (($res = socket_connect($ssock, $saddress, $sport)) < 0)
{
print('Cannot bind socket: ' . socket_strerror($res));
continue;
}
ob_implicit_flush();
$clientClose = false;
$serverClose = false;
while(!$clientClose && !$serverClose)
{
$arr = array();
$carr = array();
$sarr = array();
if (!$clientClose)
{
$arr[]= $csock;
$carr[]= $csock;
}
if (!$serverClose)
{
$arr[]= $ssock;
$sarr[]= $ssock;
}
ob_implicit_flush(); $res = socket_select($arr, $e2=null, $e = null, 5);
if ($res === false)
{
print "problem\n";
break;
}
else
{
$res = @socket_select($carr, $w = NULL, $e = NULL, 0);
if (!$clientClose && ($res === 1))
{
$buf = @socket_read($csock, 2048, PHP_NORMAL_READ);
if (strlen($buf) != 0)
{
socket_write($ssock, $buf, strlen($buf));
print "C>>S: $buf\n";
}
if ($buf === false)
{
$clientClose = true;
socket_write($ssock, "\n", 1);
print "close connection to client\n";
}
}
$res = @socket_select($sarr, $w = NULL, $e = NULL, 0);
if (!$serverClose && ($res === 1))
{
$buf = @socket_read($ssock, 2048, PHP_NORMAL_READ);
if (strlen($buf) != 0)
{
socket_write($csock, $buf, strlen($buf));
print "C<<S: $buf\n";
}
if($buf ===0 )
{
print "\n";
}
if ($buf === false)
{
//socket_close($csock);
$serverClose = true;
print "close connection to server\n";
}
}
}
}
socket_close($ssock);
socket_close($csock);
}
socket_close($lsock);
?>