Your IP : 216.73.216.224
<?php
/*******************************************************************************************************************
*
* This work is licensed under the Creative Commons Attribution 3.0 United States License.
* To view a copy of this license, visit http://creativecommons.org/licenses/by/3.0/us/ or
* send a letter to Creative Commons, 171 Second Street, Suite 300, San Francisco, California, 94105, USA.
*
*******************************************************************************************************************/
class SocketServer
{
private $socket;
private $address;
private $port;
private $max_clients;
private $clients;
private $output;
private $handler;
private $client_type;
private $client_class;
private $policy_file;
// Construct the initial server object //
function __construct($address = "localhost", $port=12345, $c_type=GC_TELNET, $max_clients=256)
{
set_time_limit (0);
$this->address = $address;
$this->port = $port;
$this->max_clients = $max_clients;
$this->clients = array();
$this->read = array();
$this->output = "";
$this->handler = false;
$this->client_type = $c_type;
$this->set_client_class();
// Policy file for flash clients //
$policy_file =
'<'.'?xml version="1.0" encoding="UTF-8"?'.'>'.
'<cross-domain-policy xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="http://www.adobe.com/xml/schemas/PolicyFileSocket.xsd">'.
'<allow-access-from domain="*" to-ports="*" secure="false" />'.
'<site-control permitted-cross-domain-policies="master-only" />'.
'</cross-domain-policy>';
}
// Create the server instance //
function create()
{
// Create a TCP Stream socket
$this->socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
// Set the REUSE option before binding //
if(!socket_set_option($this->socket,SOL_SOCKET,SO_REUSEADDR,1))
{
print(socket_strerror(socket_last_error($this->socket)));
die();
}
$time = time();
$bound = false;
// Bind the socket to an address/port
while ($time + 10 > time() && !$bound)
{
print ("Attempting to bind to port {$this->port}...\n");
$bound = socket_bind($this->socket, $this->address, $this->port);
if ($bound)
break;
else
sleep(1);
}
if (!$bound)
{
print ("Could not bind...\n");
die();
}
// Start listening for connections
if (socket_listen($this->socket))
print ("Socket server started at address {$this->address} on port {$this->port}\n");
// Make it non-blocking //
socket_set_nonblock($this->socket);
}
// Orderly server shutdown //
function shutdown()
{
// Close the client sockets //
for ($i = 0; $i < $this->max_clients; $i++) // for each client
{
if (is_resource($clients[$i]->socket)) {
socket_write($clients[$i]->socket, "Server is going down!\n");
socket_close($clients[$i]->socket);
unset($clients[$i]);
print("Forced disconnect of Client $i");
}
}
socket_close($this->socket);
}
// Listen for and accept new connections //
function listen()
{
$client_class = $this->client_class;
$this->read = array($this->socket);
// Setup clients listen socket for reading
for ($i = 0; $i < $this->max_clients; $i++)
{
if (is_resource($this->clients[$i]->socket))
$this->read[$i + 1] = $this->clients[$i]->socket ;
}
// Set up a non-blocking call to socket_select()
$ready = socket_select($this->read, $write = NULL, $except = NULL, 0); // For blocking: $tv_sec = NULL);
/* if a new connection is being made add it to the client array */
if (in_array($this->socket, $this->read))
{
for ($i = 0; $i < $this->max_clients; $i++)
{
if (!is_object($this->clients[$i]))
{
$this->clients[$i] = new $client_class($i, socket_accept($this->socket));
print("Client $i connected.\n");
// Call on_connect -- should be overridden for any extended functionality //
$this->on_connect($i);
break;
} elseif ($i == $this->max_clients - 1)
print ("Too many clients connected.");
}
if (--$ready <= 0)
return;
} // end if in_array
}
// Default handling for a new client successfully connected //
function on_connect($clientID)
{
return true;
}
// Default handling for a client disconnecting //
function on_disconnect($clientID)
{
return true;
}
// Write to all clients //
function write_all($buf, $fromClient = -1)
{
if ($buf != "") // New messages to send //
{
echo "[$fromClient] sends: $buf\n";
for ($i = 0; $i < $this->max_clients; $i++) // for each client
{
if (is_resource($this->clients[$i]->socket))
{
socket_write($this->clients[$i]->socket, $buf . "\r\n");
}
}
}
}
// Write to all clients except the one specified //
function write_all_except($cID, $buf)
{
if ($buf != "") // New messages to send //
{
for ($i = 0; $i < $this->max_clients; $i++) // for each client
{
if ($i != $cID && is_resource($this->clients[$i]->socket))
{
socket_write($this->clients[$i]->socket, $buf . "\r\n");
}
}
}
}
// Write to specific client //
function write_client($cID, $buf)
{
if ($buf != "") // New messages to send //
{
if (is_resource($this->clients[$cID]->socket))
{
socket_write($this->clients[$cID]->socket, $buf . "\r\n");
}
}
}
// Read incoming data
function read_incoming()
{
for ($i = 0; $i < $this->max_clients; $i++) // for each client
{
if (in_array($this->clients[$i]->socket, $this->read))
{
//$input = socket_read($this->clients[$i]->socket, 2048, PHP_BINARY_READ);
@socket_recv($this->clients[$i]->socket, $input, 2048, MSG_DONTWAIT);
if ($input == null)
{
// Zero length string meaning disconnected
echo "Disconnecting $i: bad read.\n";
$this->on_disconnect($i);
unset ($this->clients[$i]);
break;
} else {
$input = trim($input);
$this->on_read($i, $input);
}
}
}
}
// Handle data successfully read //
function on_read($client, $data)
{
print ("Client $client sent: $data\n");
if ($data == 'exit')
{
// requested disconnect
socket_close($this->clients[$client]->socket);
unset($this->clients[$client]);
print ("Client $client requested disconnect.\n");
return;
}
if ($data == 'shutdown')
{
print ("Client $client requested server shutdown.\n");
$this->shutdown();
return;
}
$this->append_buffer("Client $client said, \"$data\"\n");
}
// Add data to the buffer that will be written to all //
function append_buffer($data)
{
$this->output .= $data;
}
// Handle incoming/outgoing traffic //
function process_looped()
{
// Loop continuously
while (true) {
// Look for new clients //
$this->listen();
// If a client is trying to send data, handle it now //
$this->read_incoming();
// Write data bound for all clients //
$this->write_all($this->output);
$this->output = "";
} // end while
}
// Handle incoming/outgoing traffic ONCE //
function process()
{
// Look for new clients //
$this->listen();
// If a client is trying to send data, handle it now //
$this->read_incoming();
// Write data bound for all clients //
$this->write_all($this->output);
$this->output = "";
}
// Get the client type (Telnet, WebSocket, Flash) //
function getClientType()
{
return $this->client_type;
}
// Set the Class to be used for client instances //
function set_client_class($cc = "SocketClient")
{
$this->client_class = $cc;
}
// Return the client object //
function getClientObject($id)
{
if (is_object($this->clients[$id]))
return $this->clients[$id];
else
return false;
}
function setClientObject($id, $cObj)
{
$this->clients[$id] = $cObj;
}
function removeClientObject($id)
{
unset ($this->clients[$id]);
}
function getClients()
{
return $this->clients;
}
function getHeaders($req)
{
/*
GET /phudbase/wm_server/server.php HTTP/1.1
Upgrade: WebSocket
Connection: Upgrade
Host: pbtest.com:12346
Origin: http://pbtest.com
*/
$req = str_replace("GET ", "", $req);
$req = str_replace(" HTTP/1.1", "", $req);
$req = str_replace("Upgrade: WebSocket\r\n", "", $req);
$req = str_replace("Connection: Upgrade\r\n", "", $req);
$req = str_replace("Host: ", "", $req);
$req = str_replace("Origin: ", "", $req);
$parts = split("\r\n", $req);
$res = $parts[0];
$host = $parts[1];
$ori = $parts[2];
return array($res,$host,$ori);
}
}
if (!defined('MSG_DONTWAIT')) {
define('MSG_DONTWAIT', 0x40);
return 1;
}
?>