public function Read($Length = 1400)
{
$this->Buffer->Set(FRead($this->Socket, $Length));
if ($this->Buffer->Remaining() === 0) {
// TODO: Should we throw an exception here?
return;
}
$Header = $this->Buffer->GetLong();
if ($Header === -1) {
// We don't have to do anything
} else {
if ($Header === -2) {
$Packets = array();
$IsCompressed = false;
$ReadMore = false;
do {
$RequestID = $this->Buffer->GetLong();
switch ($this->Engine) {
case SourceQuery::GOLDSOURCE:
$PacketCountAndNumber = $this->Buffer->GetByte();
$PacketCount = $PacketCountAndNumber & 0xf;
$PacketNumber = $PacketCountAndNumber >> 4;
break;
case SourceQuery::SOURCE:
$IsCompressed = ($RequestID & 0x80000000) !== 0;
$PacketCount = $this->Buffer->GetByte();
$PacketNumber = $this->Buffer->GetByte() + 1;
if ($IsCompressed) {
$this->Buffer->GetLong();
// Split size
$PacketChecksum = $this->Buffer->GetUnsignedLong();
} else {
$this->Buffer->GetShort();
// Split size
}
break;
}
$Packets[$PacketNumber] = $this->Buffer->Get();
$ReadMore = $PacketCount > sizeof($Packets);
} while ($ReadMore && $this->Sherlock($Length));
$Buffer = Implode($Packets);
// TODO: Test this
if ($IsCompressed) {
// Let's make sure this function exists, it's not included in PHP by default
if (!Function_Exists('bzdecompress')) {
throw new RuntimeException('Received compressed packet, PHP doesn\'t have Bzip2 library installed, can\'t decompress.');
}
$Data = bzdecompress($Data);
if (CRC32($Data) !== $PacketChecksum) {
throw new SourceQueryException('CRC32 checksum mismatch of uncompressed packet data.');
}
}
$this->Buffer->Set(SubStr($Buffer, 4));
} else {
throw new SourceQueryException('Socket read: Raw packet header mismatch. (0x' . DecHex($Header) . ')');
}
}
}
/**
* Get rules (cvars) from the server
*
* @throws SourceQueryException
*
* @return bool|array Returns array with rules on success, false on failure
*/
public function GetRules()
{
if (!$this->Connected) {
return false;
}
switch ($this->GetChallenge(self::A2S_RULES, self::S2A_RULES)) {
case self::GETCHALLENGE_FAILED:
return false;
case self::GETCHALLENGE_ALL_CLEAR:
$this->Socket->Write(self::A2S_RULES, $this->Challenge);
$this->Socket->Read();
$Type = $this->Buffer->GetByte();
if ($Type == 0) {
return false;
} else {
if ($Type != self::S2A_RULES) {
throw new SourceQueryException('GetRules: Packet header mismatch. (0x' . DecHex($Type) . ')');
}
}
break;
}
$Rules = array();
$Count = $this->Buffer->GetShort();
while ($Count-- > 0 && $this->Buffer->Remaining() > 0) {
$Rule = $this->Buffer->GetString();
$Value = $this->Buffer->GetString();
if (!empty($Rule)) {
$Rules[$Rule] = $Value;
}
}
return $Rules;
}
