<?php
define("SERVERDATA_EXECCOMMAND",2);
define("SERVERDATA_AUTH",3);

class RCon {
var $Password;
var $Host;
var $Port = 27015;
var $_Sock = null;
var $_Id = 0;

function RCon ($Host,$Port,$Password) {
$this->Password = $Password;
$this->Host = $Host;
$this->Port = $Port;
$this->_Sock = @fsockopen($this->Host,$this->Port, $errno, $errstr, 30) or
die("Unable to open socket: $errstr ($errno)\n");
$this->_Set_Timeout($this->_Sock,2,500);
}

function Auth () {
$PackID = $this->_Write(SERVERDATA_AUTH,$this->Password);

// Real response (id: -1 = failure)
$ret = $this->_PacketRead();
//var_dump($ret);
if ($ret[0]['ID'] == -1) {
return false;
}
return true;
}

function _Set_Timeout(&$res,$s,$m=0) {
if (version_compare(phpversion(),'4.3.0','<')) {
return socket_set_timeout($res,$s,$m);
}
return stream_set_timeout($res,$s,$m);
}

function _Write($cmd, $s1='', $s2='') {
// Get and increment the packet id
$id = ++$this->_Id;

// Put our packet together
$data = pack("VV",$id,$cmd).$s1.chr(0).$s2.chr(0);

// Prefix the packet size
$data = pack("V",strlen($data)).$data;

// Send packet
fwrite($this->_Sock,$data,strlen($data));

// In case we want it later we'll return the packet id
return $id;
}

function _PacketRead() {
//Declare the return array
$retarray = array();
//Fetch the packet size
while ($size = @fread($this->_Sock,4)) {
$size = unpack('V1Size',$size);
//Work around valve breaking the protocol
if ($size["Size"] > 4096) {
//pad with 8 nulls
$packet = "\x00\x00\x00\x00\x00\x00\x00\x00".fread($this->_Sock,4096);
} else {
//Read the packet back
$packet = fread($this->_Sock,$size["Size"]);
}
array_push($retarray,unpack("V1ID/V1Response/a*S1/a*S2",$packet));
}
return $retarray;
}

function Read() {
$Packets = $this->_PacketRead();

foreach($Packets as $pack) {
if (isset($ret[$pack['ID']])) {
$ret[$pack['ID']]['S1'] .= $pack['S1'];
$ret[$pack['ID']]['S2'] .= $pack['S1'];
} else {
$ret[$pack['ID']] = array(
'Response' => $pack['Response'],
'S1' => $pack['S1'],
'S2' => $pack['S2'],
);
}
}
return $ret;
}

function sendCommand($Command) {
//$Command = '"'.trim(str_replace(' ','" "', $Command)).'"';
//$Command="stop";
$this->_Write(SERVERDATA_EXECCOMMAND,$Command,'');
}

function rconCommand($Command) {
$this->sendcommand($Command);

$ret = $this->Read();

//ATM: Source servers don't return the request id, but if they fix this the code below should read as
// return $ret[$this->_Id]['S1'];
return $ret[$this->_Id]['S1'];
}
}
?>