package org.jscsi.target.connection.stage.fullfeature;
import java.io.IOException;
import java.security.DigestException;
import org.jscsi.exception.InternetSCSIException;
import org.jscsi.parser.BasicHeaderSegment;
import org.jscsi.parser.InitiatorMessageParser;
import org.jscsi.parser.ProtocolDataUnit;
import org.jscsi.target.connection.phase.TargetFullFeaturePhase;
import org.jscsi.target.scsi.cdb.ScsiOperationCode;
import org.jscsi.target.scsi.sense.senseDataDescriptor.senseKeySpecific.FieldPointerSenseKeySpecificData;
import org.jscsi.target.settings.SettingsException;
/**
* Unlike the other subclasses of {@link TargetFullFeatureStage}, this class is not associated with a single
* {@link ScsiOperationCode}. All SCSI Command PDUs containing a SCSI OpCode not supported by the jSCSI Target (i.e.
* without a dedicated FullFeatureStage to process them) shall be passed to the {@link #execute(ProtocolDataUnit)}
* method of this class, which will dispatch a standard SCSI Response PDU stating that the given
* {@link ScsiOperationCode} is not supported by this target.
*
* @author Andreas Ergenzinger
*/
public class UnsupportedOpCodeStage extends TargetFullFeatureStage {
public UnsupportedOpCodeStage (TargetFullFeaturePhase targetFullFeaturePhase) {
super(targetFullFeaturePhase);
}
@Override
public void execute (ProtocolDataUnit pdu) throws IOException , InterruptedException , InternetSCSIException , DigestException , SettingsException {
final BasicHeaderSegment bhs = pdu.getBasicHeaderSegment();
final InitiatorMessageParser parser = (InitiatorMessageParser) bhs.getParser();
// the SCSI OpCode is not supported, tell the initiator
final FieldPointerSenseKeySpecificData fp = new FieldPointerSenseKeySpecificData(true,// senseKeySpecificDataValid
true,// commandData (i.e. invalid field in CDB)
false,// bitPointerValid
0,// bitPointer, reserved since invalid
0);// fieldPointer to the SCSI OpCode field
final FieldPointerSenseKeySpecificData[] fpArray = new FieldPointerSenseKeySpecificData[] { fp };
// If the parser is null..
int essn = -1;
if (parser != null) {
essn = parser.getExpectedStatusSequenceNumber();
}
final ProtocolDataUnit responsePdu = createFixedFormatErrorPdu(fpArray,// senseKeySpecificData
bhs.getInitiatorTaskTag(),// initiatorTaskTag
essn);// expectedDataTransferLength
// send response
connection.sendPdu(responsePdu);
}
}