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.ProtocolDataUnit;
import org.jscsi.parser.scsi.SCSICommandParser;
import org.jscsi.parser.scsi.SCSIResponseParser;
import org.jscsi.parser.scsi.SCSIStatus;
import org.jscsi.target.connection.TargetPduFactory;
import org.jscsi.target.connection.phase.TargetFullFeaturePhase;
import org.jscsi.target.scsi.ScsiResponseDataSegment;
import org.jscsi.target.scsi.cdb.TestUnitReadyCdb;
import org.jscsi.target.scsi.sense.senseDataDescriptor.senseKeySpecific.FieldPointerSenseKeySpecificData;
import org.jscsi.target.settings.SettingsException;
/**
* A stage for processing <code>TEST UNIT READY</code> SCSI commands.
*
* @author Andreas Ergenzinger
*/
public class TestUnitReadyStage extends TargetFullFeatureStage {
public TestUnitReadyStage(TargetFullFeaturePhase targetFullFeaturePhase) {
super(targetFullFeaturePhase);
}
@Override
public void execute(ProtocolDataUnit pdu) throws IOException, InterruptedException,
InternetSCSIException, DigestException, SettingsException {
final BasicHeaderSegment bhs = pdu.getBasicHeaderSegment();
final SCSICommandParser parser = (SCSICommandParser)bhs.getParser();
ProtocolDataUnit responsePdu;// the response PDU
// get command details in CDB
final TestUnitReadyCdb cdb = new TestUnitReadyCdb(parser.getCDB());
final FieldPointerSenseKeySpecificData[] illegalFieldPointers = cdb.getIllegalFieldPointers();
if (illegalFieldPointers != null) {
// an illegal request has been made
responsePdu = createFixedFormatErrorPdu(illegalFieldPointers,// senseKeySpecificData,
bhs.getInitiatorTaskTag(),// initiatorTaskTag,
parser.getExpectedDataTransferLength());// expDataTransferLength
} else {
// PDU is okay
// carry out command
// the logical unit is always ready
responsePdu = TargetPduFactory.createSCSIResponsePdu(false,// bidirectionalReadResidualOverflow
false,// bidirectionalReadResidualUnderflow
false,// residualOverflow
false,// residualUnderflow,
SCSIResponseParser.ServiceResponse.COMMAND_COMPLETED_AT_TARGET,// response,
SCSIStatus.GOOD,// status,
bhs.getInitiatorTaskTag(),// initiatorTaskTag,
0,// snackTag
0,// expectedDataSequenceNumber
0,// bidirectionalReadResidualCount
0,// residualCount
ScsiResponseDataSegment.EMPTY_DATA_SEGMENT);// data
// segment
}
// send response
connection.sendPdu(responsePdu);
}
}