redirect connection with sockets???

[landysaccount]

Hello.

 

This is a follow up on a previous thread.

 

I'm trying to redirect a socket connection via browser to another script or page but, I'm having a lot of problems trying to do it. I don't know if it can be done. Please guide me to where I can get some input on it. I've google about it and nothing exactly...

The socket file looks like this:

$host = "172.16.0.3";
$port = "200";

// don't timeout!
set_time_limit(0);

// create socket
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP ) or die("Could not create socket\n");

// bind socket to port
$result = socket_bind($socket, $host, $port) or die("Could not bind to socket\n");

// start listening for connections
$result = socket_listen($socket, 3) or die("Could not set up socket listener\n");

while( true ){
// accept incoming connections
// spawn another socket to handle communication
$spawn = socket_accept($socket) or die("Could not accept incoming connection\n");

// read client input
$input = socket_read($spawn, 1024) or die("Could not read input\n");

// clean up input string
$input = trim($input);

// reverse client input and send back
$output = strrev($input) . "\n";

header('Location: http://www.cnn.com/');

$output = "hello there.. you're connected";

socket_write($spawn, $output, strlen ($output)) or die("Could not write output\n");


}
// close sockets
socket_close($spawn);

socket_close($socket);

?>

 

I put in the browser's addr bar: http://172.16.0.3:200

 

and get "hello there.. you're connected"...

 

Can it be done??

 

 

Any suggestions?

 

Thanks in advanced for your help.

[landysaccount]

I think I got a socket redirect the client to a different page like this:

 

$output = '<meta http-equiv="content-type" content="text/html; charset=windows-1250" />' .

          '<meta name="generator" content="PSPad editor, www.pspad.com" />' .

          '<meta http-equiv="Expires" content="Tue, 20 Aug 1996 14:25:27 GMT" />' .

          '<meta http-equiv="Cache-Control" content="no-cache; must-revalidate" />'.

          '<meta HTTP-EQUIV="REFRESH" content="0; url=http://www.cnn.com">';

 

socket_write($spawn, $output, strlen ($output)) or die("Could not write output\n");

 

[landysaccount]

After testing, I notice it works with IE8, and Mozilla but, not with Chrome. I just get this as plain text on the brower:

 

<meta http-equiv="content-type" content="text/html; charset=windows-1250" /><meta name="generator" content="PSPad editor, www.pspad.com" /><meta http-equiv="Expires" content="Tue, 20 Aug 1996 14:25:27 GMT" /><meta http-equiv="Cache-Control" content="no-cache; must-revalidate" /><meta HTTP-EQUIV="REFRESH" content="0; url=http://www.cnn.com">

 

Don't know why?

[landysaccount]

I thought I almost had this resolved but I'm hitting a wall.

 

I'm currently testing doing a redirect with iptables to the port the socket script/daemon is listening on. This script will be doing user authentication, add some iptables rules, and saving some info to db. Now, I would like to know the address and uri request the user was trying to go to before it was redirected. I can't get it.

 

Please guide me. Thanks for your time.

[landysaccount]

 

Thanks for replying.

 

I'm running this daemon/server listening on a certain port waiting for iptables to redirect traffic to it:

 

iptables -t nat -A PREROUTING -i eth0 -p tcp \

        -s 172.16.0.0/16 --sport $UNPRIVPORTS --dport 80 \

        -j REDIRECT --to-port $daemonport

 

Now, the daemon recieves this request and redirects (or maybe do authentication on its own) to another script in the same box that will do the authentication. Based on the credentials it would add an iptables rule to allow the client to the internet and to the page the user intended to before the redirection.

 

Now, the problem is how can I get the intended address when iptables redirects it to the daemon?

 

 

I've tried:

 

'<meta HTTP-EQUIV="REFRESH" content="0; url=http://172.16.0.1/index2.php?requested=' .$_SERVER["QUERY_STRING"] .  '&referer='. $_SERVER["HTTP_REFERER"] . '&uri='. $_SERVER["REQUEST_URI"] . '">';

 

and none of these are set.

 

There might be a trick to get it.

 

Your help is appreciated.

 

Thanks.