class patServer {
var $systemVars = array(
"appName" => "patServer",
"appVersion" => "1.1",
"author" => array("Stephan Schmidt ", )
);
var $port = 10000;
var $domain = "localhost";
var $maxClients = -1;
var $readBufferSize = 128;
var $readEndCharacter = "n";
var $maxQueue = 500;
var $debug = true;
var $debugMode = "text";
var $debugDest = "stdout";
var $null = array();
var $clientFD = array();
var $clientInfo = array();
var $serverInfo = array();
var $clients = 0;
function patServer( $domain = "localhost", $port = 10000 )
{
$this->domain = $domain;
$this->port = $port;
$this->serverInfo["domain"] = $domain;
$this->serverInfo["port"] = $port;
$this->serverInfo["servername"] = $this->systemVars["appName"];
$this->serverInfo["serverversion"] = $this->systemVars["appVersion"];
set_time_limit( 0 );
}
function setMaxClients( $maxClients )
{
$this->maxClients = $maxClients;
}
function setDebugMode( $debug, $dest = "stdout" )
{
if( $debug === false )
{
$this->debug = false;
return true;
}
$this->debug = true;
$this->debugMode = $debug;
$this->debugDest = $dest;
}
function start()
{
$this->initFD = @socket_create( AF_INET, SOCK_STREAM, 0 );
if( !$this->initFD )
die( "patServer: Could not create socket." );
// adress may be reused
socket_setopt( $this->initFD, SOL_SOCKET, SO_REUSEADDR, 1 );
// bind the socket
if( !@socket_bind( $this->initFD, $this->domain, $this->port ) )
{
@socket_close( $this->initFD );
die( "patServer: Could not bind socket to ".$this->domain." on port ".$this->port." ( ".$this->getLastSocketError( $this->initFd )." )." );
}
// listen on selected port
if( !@socket_listen( $this->initFD, $this->maxQueue ) )
die( "patServer: Could not listen ( ".$this->getLastSocketError( $this->initFd )." )." );
$this->sendDebugMessage( "Listening on port ".$this->port.". Server started at ".date( "H:i:s", time() ) );
// this allows the shutdown function to check whether the server is already shut down
$GLOBALS["_patServerStatus"] = "running";
// this ensures that the server will be sutdown correctly
register_shutdown_function( array( $this, "shutdown" ) );
if( method_exists( $this, "onStart" ) )
$this->onStart();
$this->serverInfo["started"] = time();
$this->serverInfo["status"] = "running";
while( true )
{
$readFDs = array();
array_push( $readFDs, $this->initFD );
// fetch all clients that are awaiting connections
for( $i = 0; $i < count( $this->clientFD ); $i++ )
if( isset( $this->clientFD[$i] ) )
array_push( $readFDs, $this->clientFD[$i] );
// block and wait for data or new connection
$ready = @socket_select( $readFDs, $this->null, $this->null, NULL );
if( $ready === false )
{
$this->sendDebugMessage( "socket_select failed." );
$this->shutdown();
}
// check for new connection
if( in_array( $this->initFD, $readFDs ) )
{
$newClient = $this->acceptConnection( $this->initFD );
// check for maximum amount of connections
if( $this->maxClients > 0 )
{
if( $this->clients > $this->maxClients )
{
$this->sendDebugMessage( "Too many connections." );
if( method_exists( $this, "onConnectionRefused" ) )
$this->onConnectionRefused( $newClient );
$this->closeConnection( $newClient );
}
}
if( --$ready <= 0 )
continue;
}
// check all clients for incoming data
for( $i = 0; $i < count( $this->clientFD ); $i++ )
{
if( !isset( $this->clientFD[$i] ) )
continue;
if( in_array( $this->clientFD[$i], $readFDs ) )
{
$data = $this->readFromSocket( $i );
// empty data => connection was closed
if( !$data )
{
$this->sendDebugMessage( "Connection closed by peer" );
$this->closeConnection( $i );
}
else
{
$this->sendDebugMessage( "Received ".trim( $data )." from ".$i );
if( method_exists( $this, "onReceiveData" ) )
$this->onReceiveData( $i, $data );
}
}
}
}
}
function readFromSocket( $clientId )
{
// start with empty string
$data = "";
// read data from socket
while( $buf = socket_read( $this->clientFD[$clientId], $this->readBufferSize ) )
{
$data .= $buf;
$endString = substr( $buf, - strlen( $this->readEndCharacter ) );
if( $endString == $this->readEndCharacter )
break;
if( $buf == NULL )
break;
}
if( $buf === false )
$this->sendDebugMessage( "Could not read from client ".$clientId." ( ".$this->getLastSocketError( $this->clientFD[$clientId] )." )." );
return $data;
}
function acceptConnection( &$socket )
{
for( $i = 0 ; $i <= count( $this->clientFD ); $i++ )
{
if( !isset( $this->clientFD[$i] ) || $this->clientFD[$i] == NULL )
{
$this->clientFD[$i] = socket_accept( $socket );
socket_setopt( $this->clientFD[$i], SOL_SOCKET, SO_REUSEADDR, 1 );
$peer_host = "";
$peer_port = "";
socket_getpeername( $this->clientFD[$i], $peer_host, $peer_port );
$this->clientInfo[$i] = array(
"host" => $peer_host,
"port" => $peer_port,
"connectOn" => time()
);
$this->clients++;
$this->sendDebugMessage( "New connection ( ".$i." ) from ".$peer_host." on port ".$peer_port );
if( method_exists( $this, "onConnect" ) )
$this->onConnect( $i );
return $i;
}
}
}
function isConnected( $id )
{
if( !isset( $this->clientFD[$id] ) )
return false;
return true;
}
function closeConnection( $id )
{
if( !isset( $this->clientFD[$id] ) )
return false;
if( method_exists( $this, "onClose" ) )
$this->onClose( $id );
$this->sendDebugMessage( "Closed connection ( ".$id." ) from ".$this->clientInfo[$id]["host"]." on port ".$this->clientInfo[$id]["port"] );
@socket_close( $this->clientFD[$id] );
$this->clientFD[$id] = NULL;
unset( $this->clientInfo[$id] );
$this->clients--;
}
function shutDown()
{
if( $GLOBALS["_patServerStatus"] != "running" )
exit;
$GLOBALS["_patServerStatus"] = "stopped";
if( method_exists( $this, "onShutdown" ) )
$this->onShutdown();
$maxFD = count( $this->clientFD );
for( $i = 0; $i < $maxFD; $i++ )
$this->closeConnection( $i );
@socket_close( $this->initFD );
$this->sendDebugMessage( "Shutdown server." );
exit;
}
function getClients()
{
return $this->clients;
}
function sendData( $clientId, $data, $debugData = true )
{
if( !isset( $this->clientFD[$clientId] ) || $this->clientFD[$clientId] == NULL )
return false;
if( $debugData )
$this->sendDebugMessage( "sending: "" . $data . "" to: $clientId" );
if( !@socket_write( $this->clientFD[$clientId], $data ) )
$this->sendDebugMessage( "Could not write '".$data."' client ".$clientId." ( ".$this->getLastSocketError( $this->clientFD[$clientId] )." )." );
}
function broadcastData( $data, $exclude = array(), $debugData = true )
{
if( !empty( $exclude ) && !is_array( $exclude ) )
$exclude = array( $exclude );
for( $i = 0; $i < count( $this->clientFD ); $i++ )
{
if( isset( $this->clientFD[$i] ) && $this->clientFD[$i] != NULL && !in_array( $i, $exclude ) )
{
if( $debugData )
$this->sendDebugMessage( "sending: "" . $data . "" to: $i" );
if( !@socket_write( $this->clientFD[$i], $data ) )
$this->sendDebugMessage( "Could not write '".$data."' client ".$i." ( ".$this->getLastSocketError( $this->clientFD[$i] )." )." );
}
}
}
function getClientInfo( $clientId )
{
if( !isset( $this->clientFD[$clientId] ) || $this->clientFD[$clientId] == NULL )
return false;
return $this->clientInfo[$clientId];
}
function sendDebugMessage( $msg )
{
if( !$this->debug )
return false;
$msg = date( "Y-m-d H:i:s", time() ) . " " . $msg;
switch( $this->debugMode )
{
case "text":
$msg = $msg."n";
break;
case "html":
$msg = htmlspecialchars( $msg ) . "
n";
break;
}
if( $this->debugDest == "stdout" || empty( $this->debugDest ) )
{
echo $msg;
flush();
return true;
}
error_log( $msg, 3, $this->debugDest );
return true;
}
function getLastSocketError( &$fd )
{
$lastError = socket_last_error( $fd );
return "msg: " . socket_strerror( $lastError ) . " / Code: ".$lastError;
}
function onReceiveData($ip,$data){
$this->broadcastData( $data,array(), true );
}
}
$patServer = new patServer();
$patServer->start();
