/** {@inheritDoc} */
public final void execute() throws InternetSCSIException {
final ProtocolDataUnit protocolDataUnit =
protocolDataUnitFactory.create(
false,
true,
OperationCode.SCSI_COMMAND,
connection.getSetting(OperationalTextKey.HEADER_DIGEST),
connection.getSetting(OperationalTextKey.DATA_DIGEST));
final SCSICommandParser scsi =
(SCSICommandParser) protocolDataUnit.getBasicHeaderSegment().getParser();
scsi.setReadExpectedFlag(false);
scsi.setWriteExpectedFlag(true);
scsi.setTaskAttributes(taskAttributes);
scsi.setExpectedDataTransferLength(expectedDataTransferLength);
final int maxRecvDataSegmentLength =
connection.getSettingAsInt(OperationalTextKey.MAX_RECV_DATA_SEGMENT_LENGTH);
scsi.setCommandDescriptorBlock(
SCSICommandDescriptorBlockParser.createWriteMessage(logicalBlockAddress, transferLength));
final IDataSegment dataSegment =
DataSegmentFactory.create(
buffer,
bufferPosition,
expectedDataTransferLength,
DataSegmentFormat.BINARY,
maxRecvDataSegmentLength);
final IDataSegmentIterator iterator = dataSegment.iterator();
int bufferOffset = 0;
if (connection.getSettingAsBoolean(OperationalTextKey.IMMEDIATE_DATA)) {
final int min =
Math.min(
maxRecvDataSegmentLength,
connection.getSettingAsInt(OperationalTextKey.FIRST_BURST_LENGTH));
protocolDataUnit.setDataSegment(iterator.next(min));
bufferOffset += min;
}
connection.send(protocolDataUnit);
if (!connection.getSettingAsBoolean(OperationalTextKey.INITIAL_R2T) && iterator.hasNext()) {
connection.nextState(
new WriteFirstBurstState(connection, iterator, 0xFFFFFFFF, 0, bufferOffset));
} else {
connection.nextState(new WriteSecondResponseState(connection, iterator, 0, bufferOffset));
}
super.stateFollowing = true;
// return true;
}
@Override
public void execute(ProtocolDataUnit pdu)
throws IOException, InterruptedException, InternetSCSIException, DigestException,
IllegalArgumentException, SettingsException {
LOGGER.debug("Entering LOPN Stage");
BasicHeaderSegment bhs = pdu.getBasicHeaderSegment();
initiatorTaskTag = bhs.getInitiatorTaskTag();
String keyValuePairProposal = receivePduSequence(pdu);
// negotiate parameters, leave if unsuccessful
final Vector<String> requestKeyValuePairs =
TextParameter.tokenizeKeyValuePairs(keyValuePairProposal);
final Vector<String> responseKeyValuePairs = new Vector<String>();
if (!negotiator.negotiate(
stageNumber,
connection.isLeadingConnection(),
((TargetLoginPhase) targetPhase).getFirstPduAndSetToFalse(),
requestKeyValuePairs,
responseKeyValuePairs)) {
// negotiation failure, no exception
sendRejectPdu(LoginStatus.INITIATOR_ERROR);
// nextStageNumber = null;//no change
return;
}
// print request and response key value pairs if debugging
if (LOGGER.isDebugEnabled()) {
final StringBuilder sb = new StringBuilder();
sb.append("request: ");
for (String s : requestKeyValuePairs) {
sb.append("\n ");
sb.append(s);
}
sb.append("\nresponse: ");
for (String s : responseKeyValuePairs) {
sb.append("\n ");
sb.append(s);
}
LOGGER.debug(sb.toString());
}
// make sure that initiator wants to proceed to FFP, leave if it does
// not
if (requestedNextStageNumber != LoginStage.FULL_FEATURE_PHASE) {
sendRejectPdu(LoginStatus.INITIATOR_ERROR);
throw new InternetSCSIException();
}
// concatenate key-value pairs to null char-separated string
final String keyValuePairReply = TextParameter.concatenateKeyValuePairs(responseKeyValuePairs);
// send reply, finish negotiation, and return successfully
sendPduSequence(keyValuePairReply, LoginStage.FULL_FEATURE_PHASE);
negotiator.finishNegotiation(true);
nextStageNumber = LoginStage.FULL_FEATURE_PHASE;
}
@Override
public void execute(ProtocolDataUnit pdu)
throws IOException, InterruptedException, InternetSCSIException, DigestException,
SettingsException {
LOGGER.debug("Initiator has sent FORMAT UNIT command.");
final BasicHeaderSegment bhs = pdu.getBasicHeaderSegment();
final SCSICommandParser parser = (SCSICommandParser) bhs.getParser();
ProtocolDataUnit responsePdu = null; // the response PDU
// get command details in CDB
final FormatUnitCDB cdb = new FormatUnitCDB(parser.getCDB());
final FieldPointerSenseKeySpecificData[] illegalFieldPointers = cdb.getIllegalFieldPointers();
if (illegalFieldPointers != null) {
// an illegal request has been made
FixedFormatSenseData senseData =
new FixedFormatSenseData(
false, // valid
ErrorType.CURRENT, // error type
false, // file mark
false, // end of medium
false, // incorrect length indicator
SenseKey.ILLEGAL_REQUEST, // sense key
new FourByteInformation(), // information
new FourByteInformation(), // command specific information
AdditionalSenseCodeAndQualifier.INVALID_FIELD_IN_CDB, // additional
// sense
// code
// and
// qualifier
(byte) 0, // field replaceable unit code
illegalFieldPointers[0], // sense key specific data, only
// report first problem
new AdditionalSenseBytes()); // additional sense bytes
responsePdu =
TargetPduFactory.createSCSIResponsePdu(
false, // bidirectionalReadResidualOverflow
false, // bidirectionalReadResidualUnderflow
false, // residualOverflow
false, // residualUnderflow,
SCSIResponseParser.ServiceResponse.COMMAND_COMPLETED_AT_TARGET, // response,
SCSIStatus.CHECK_CONDITION, // status,
bhs.getInitiatorTaskTag(), // initiatorTaskTag,
0, // snackTag
0, // expectedDataSequenceNumber
0, // bidirectionalReadResidualCount
0, // residualCount
new ScsiResponseDataSegment(
senseData, parser.getExpectedDataTransferLength())); // data
// segment
} else {
// PDU is okay
// carry out command
/*
* If we were nice, we would have to get (we would actually have to save it first) the number of blocks and
* the block length requested by the initiator in the last MODE SENSE command and then change the logical
* block layout accordingly. However, since the target is not required by the SCSI standard to make those
* changes ("The degree that the medium is altered by this command is vendor specific."), doing nothing is
* okay.
*/
responsePdu =
createScsiResponsePdu(
SCSIStatus.GOOD, // status
bhs.getInitiatorTaskTag(), // initiatorTaskTag,
parser.getExpectedDataTransferLength(), // expectedDataTransferLength,
0); // responseDataSize
}
// send response
connection.sendPdu(responsePdu);
}
