path: root/src/main/java/org/openslx/util/vm/VboxMetaData.java

package org.openslx.util.vm;

import java.io.File;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.nio.charset.StandardCharsets;
import java.util.List;
import java.util.UUID;

import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.TransformerFactoryConfigurationError;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;

import org.apache.log4j.Logger;
import org.openslx.bwlp.thrift.iface.OperatingSystem;
import org.openslx.bwlp.thrift.iface.Virtualizer;

public class VboxMetaData extends VmMetaData
{
	private static final Logger LOGGER = Logger.getLogger( VboxMetaData.class );
	private static final Virtualizer virtualizer = new Virtualizer( "virtualbox", "VirtualBox" );

	private final VboxConfig config;

	public VboxMetaData( List<OperatingSystem> osList, File file ) throws IOException, UnsupportedVirtualizerFormatException
	{
		super( osList );

		this.config = new VboxConfig( file );

		init();
	}

	public VboxMetaData( List<OperatingSystem> osList, byte[] vmContent, int length ) throws IOException, UnsupportedVirtualizerFormatException
	{
		super( osList );
		this.config = new VboxConfig( vmContent, length );
		setTypeOf();
		init();

	}

	private void init()
	{
		this.config.init();

		displayName = config.getDisplayName();

		setOs( "virtualbox", config.getOsName() );

		for ( HardDisk hardDisk : config.getHdds() ) {
			hdds.add( hardDisk );
		}
		try {
			addFloppy( 0, null, true );
			WriteToFile();
		} catch ( TransformerFactoryConfigurationError | TransformerException e ) {
			// WriteToFile exceptions here...not important for the the LOGGER
			e.printStackTrace();
		}
	}

	// --TODO will be needed later again
	private void WriteToFile() throws TransformerFactoryConfigurationError, TransformerException
	{
		Transformer transformer = TransformerFactory.newInstance().newTransformer();
		StreamResult output = new StreamResult( new File( "output.xml" ) );
		Source input = new DOMSource( config.getConfigDoc() );
		transformer.transform( input, output );
	}

	@Override
	public Virtualizer getVirtualizer()
	{
		return new Virtualizer( "virtualbox", "VirtualBox" );
	}

	@Override
	public void enableUsb( boolean enabled )
	{
		// TODO Auto-generated method stub
	}

	@Override
	public void applySettingsForLocalEdit()
	{
		// TODO Auto-generated method stub
	}

	@Override
	public byte[] getFilteredDefinitionArray()
	{
		return config.toString().getBytes( StandardCharsets.UTF_8 );
	}

	@Override
	public boolean addHddTemplate( String diskImage, String hddMode, String redoDir )
	{
		config.changeAttribute( "HardDisk", "location", diskImage );
		return true;
	}

	@Override
	public boolean addHddTemplate( File diskImage, String hddMode, String redoDir )
	{
		String diskImagePath = diskImage.getName();
		config.changeAttribute( "HardDisk", "location", diskImagePath );

		UUID newhdduuid = UUID.randomUUID();
		LOGGER.debug( newhdduuid );

		// patching the new uuid in the vbox config file here
		String vboxUUid = "{" + newhdduuid.toString() + "}";
		config.changeAttribute( "HardDisk", "uuid", vboxUUid );
		config.changeAttribute( "Image", "uuid", vboxUUid );

		// write the new hdd uuid in the vdi file
		byte[] bytesToWrite = new byte[ 16 ];
		
		int[] bytesOffset = {32, 40, 48, 56, 16, 24, 0, 8, 56, 48, 40, 32, 24, 16, 8, 0};
		
		int offset = 0;
		for (int i = 0; i < 2; i++) {
			Long uuidlong = null;
			if ( i == 0 ) {
				uuidlong = newhdduuid.getMostSignificantBits();
			} else {
				uuidlong = newhdduuid.getLeastSignificantBits();
			}
			
			for ( int j = 0; j < 8; j++) {
				int index = j + offset;
				bytesToWrite[index] = (byte) (uuidlong >>> bytesOffset[index]);
			}
			offset = 8;
		}
		try ( RandomAccessFile file = new RandomAccessFile( diskImage, "rw" ) ) {

			file.seek( 392 );
			file.write( bytesToWrite, 0, 16 );
		} catch ( Exception e ) {
			LOGGER.warn( "could not patch new uuid in the vdi", e );
		}
		
		// we need a new machine uuid 
		UUID newMachineUuid = UUID.randomUUID();
		if ( newMachineUuid.equals( newhdduuid ) ) {
			LOGGER.warn( "The new Machine UUID is the same as the new HDD UUID; tying again...this vm might not start" );
			newMachineUuid = UUID.randomUUID();
		}
		String machineUUid = "{" + newMachineUuid.toString() + "}";
		config.changeAttribute( "Machine", "uuid", machineUUid );
		return true;
	}

	@Override
	public boolean addDefaultNat()
	{
		config.addNewNode( "Adapter", "NAT", false );
		return true;
	}

	public void reWrite()
	{
		try {
			WriteToFile();
		} catch ( TransformerFactoryConfigurationError | TransformerException e ) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

	@Override
	public void setOs( String vendorOsId )
	{
		// TODO Auto-generated method stub

	}

	@Override
	public boolean addDisplayName( String name )
	{
		config.changeAttribute( "Machine", "name", name );
		return true;
	}

	@Override
	public boolean addRam( int mem )
	{
		config.changeAttribute( "Memory", "RAMSize", Integer.toString( mem ) );
		return true;
	}

	@Override
	public void addFloppy( int index, String image, boolean readOnly )
	{

		if ( image == null ) {
		} else {
		}

	}

	@Override
	public boolean addCdrom( String image )
	{
		// TODO Auto-generated method stub
		return false;
	}

	@Override
	public void setTypeOf()
	{
		typeOf = TypeOf.VBOX;
	}

	@Override
	public boolean addCpuCoreCount( int nrOfCores )
	{
		config.changeAttribute( "CPU", "count", "1" );
		return true;
	}
}