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/**
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/**
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/**
/**
/**
create a new socket server
@access public
@param string $domain domain to bind to
@param integer $port port to listen to
*/
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 );
}
/**
/**
set debug mode
@access public
@param mixed $debug [text|htMLfalse]
@param string $dest destination of debug message (stdout to output or filename if log should be written)
*/
function setDebugMode( $debug,$dest = "stdout" )
{
if( $debug === false )
{
$this->debug = false;
return true;
}
$this->debug = true;
$this->debugMode = $debug;
$this->debugDest = $dest;
}
/**
start the server
@access public
@param int $maxClients
*/
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,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 );
}
}
}
}
}
/**
read from a socket
@access private
@param integer $clientId internal id of the client to read from
@return string $data data that was read
*/
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,- @R_126_1141@( $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 $data;
}
/**
accept a new connection
@access public
@param resource &$socket socket that received the new connection
@return int $clientID internal ID of the client
*/
function acceptConnection( &$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],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;
}
}
}
/**
/**
close connection to a client
@access public
@param int $clientID internal ID of the client
*/
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--;
}
/**
shutdown server
@access public
*/
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;
}
/**
/**
send data to a client
@access public
@param int $clientId ID of the client
@param string $data data to send
@param boolean $debugData flag to indicate whether data that is written to socket should also be sent as debug message
*/
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] )." )." );
}
/**
send data to all clients
@access public
@param string $data data to send
@param array $exclude client ids to exclude
*/
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] )." )." );
}
}
}
/**
/**
send a debug message
@access private
@param string $msg message to debug
*/
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;
}
/**
return string for last socket error
@access public
@return string $error last error
*/
function getLastSocketError( &$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();
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