Improve socket mocking

2026-05-18 13:53:35 +02:00 · 2015-10-21 23:54:04 +03:00
parent a8d4418f28
commit 5ab3873256
2 changed files with 90 additions and 83 deletions
@@ -35,4 +35,93 @@
 		abstract public function Open( $Ip, $Port, $Timeout, $Engine );
 		abstract public function Write( $Header, $String = '' );
 		abstract public function Read( $Length = 1400 );
+		
+		protected function ReadInternal( $Buffer, $SherlockFunction )
+		{
+			if( $Buffer->Remaining( ) === 0 )
+			{
+				throw new InvalidPacketException( 'Failed to read any data from socket', InvalidPacketException::BUFFER_EMPTY );
+			}
+			
+			$Header = $Buffer->GetLong( );
+			
+			if( $Header === -1 ) // Single packet
+			{
+				// We don't have to do anything
+			}
+			else if( $Header === -2 ) // Split packet
+			{
+				$Packets      = [];
+				$IsCompressed = false;
+				$ReadMore     = false;
+				
+				do
+				{
+					$RequestID = $Buffer->GetLong( );
+					
+					switch( $this->Engine )
+					{
+						case SourceQuery::GOLDSOURCE:
+						{
+							$PacketCountAndNumber = $Buffer->GetByte( );
+							$PacketCount          = $PacketCountAndNumber & 0xF;
+							$PacketNumber         = $PacketCountAndNumber >> 4;
+							
+							break;
+						}
+						case SourceQuery::SOURCE:
+						{
+							$IsCompressed         = ( $RequestID & 0x80000000 ) !== 0;
+							$PacketCount          = $Buffer->GetByte( );
+							$PacketNumber         = $Buffer->GetByte( ) + 1;
+							
+							if( $IsCompressed )
+							{
+								$Buffer->GetLong( ); // Split size
+								
+								$PacketChecksum = $Buffer->GetUnsignedLong( );
+							}
+							else
+							{
+								$Buffer->GetShort( ); // Split size
+							}
+							
+							break;
+						}
+					}
+					
+					$Packets[ $PacketNumber ] = $Buffer->Get( );
+					
+					$ReadMore = $PacketCount > sizeof( $Packets );
+				}
+				while( $ReadMore && $SherlockFunction( $Buffer, $Length ) );
+				
+				$Data = 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 InvalidPacketException( 'CRC32 checksum mismatch of uncompressed packet data.', InvalidPacketException::CHECKSUM_MISMATCH );
+					}
+				}
+				
+				$Buffer->Set( SubStr( $Data, 4 ) );
+			}
+			else
+			{
+				throw new InvalidPacketException( 'Socket read: Raw packet header mismatch. (0x' . DecHex( $Header ) . ')', InvalidPacketException::PACKET_HEADER_MISMATCH );
+			}
+			
+			return $Buffer;
+		}
 	}