/**
* Copyright (c) 2012, University of Konstanz, Distributed Systems Group All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are permitted provided that the
* following conditions are met: * Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer. * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation and/or other materials provided with the
* distribution. * Neither the name of the University of Konstanz nor the names of its contributors may be used to
* endorse or promote products derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.jscsi.initiator.connection.state;
import java.util.LinkedList;
import java.util.Queue;
import org.jscsi.exception.InternetSCSIException;
import org.jscsi.initiator.connection.Connection;
import org.jscsi.parser.OperationCode;
import org.jscsi.parser.ProtocolDataUnit;
import org.jscsi.parser.datasegment.DataSegmentFactory;
import org.jscsi.parser.datasegment.DataSegmentFactory.DataSegmentFormat;
import org.jscsi.parser.datasegment.IDataSegment;
import org.jscsi.parser.datasegment.IDataSegmentIterator;
import org.jscsi.parser.datasegment.IDataSegmentIterator.IDataSegmentChunk;
import org.jscsi.parser.datasegment.OperationalTextKey;
import org.jscsi.parser.datasegment.SettingsMap;
import org.jscsi.parser.login.ISID;
import org.jscsi.parser.login.LoginRequestParser;
import org.jscsi.parser.login.LoginStage;
/**
* <h1>LoginRequestState</h1>
* <p/>
* This state handles a Login Request.
*
* @author Volker Wildi
*/
public final class LoginRequestState extends AbstractState {
// --------------------------------------------------------------------------
// --------------------------------------------------------------------------
/**
* The maximum version number, which is supported by this iSCSI Implementation (RFC3720).
*/
private static final byte MAXIMUM_VERSION = 0x00;
/**
* The minimum version number, which is supported by this iSCSI Implementation (RFC3720).
*/
private static final byte MINIMUM_VERSION = 0x00;
// --------------------------------------------------------------------------
// --------------------------------------------------------------------------
/** The Next Stage of the login process. */
private final LoginStage nextStage;
// --------------------------------------------------------------------------
// --------------------------------------------------------------------------
/**
* Constructor to create a <code>LoginRequestState</code> instance, which uses the given connection for
* transmission.
*
* @param initConnection The context connection, which is used for the network transmission.
* @param initNextStage The next stage to which should transfered to.
*/
public LoginRequestState (final Connection initConnection, final LoginStage initNextStage) {
super(initConnection);
nextStage = initNextStage;
}
// --------------------------------------------------------------------------
// --------------------------------------------------------------------------
/** {@inheritDoc} */
public final void execute () throws InternetSCSIException {
final SettingsMap loginParameters = connection.getSettings();
LOGGER.info("Sending these login parameters:\n" + loginParameters);
final int maxRecvDataSegmentLength = connection.getSettingAsInt(OperationalTextKey.MAX_RECV_DATA_SEGMENT_LENGTH);
final ISID isid = ISID.createRandom(System.currentTimeMillis());
LoginRequestParser loginRequest;
boolean continueFlag;
// here the finalFlag represents the transitFlag
boolean finalFlag;
final IDataSegment dataSegment = DataSegmentFactory.create(loginParameters.asByteBuffer(), DataSegmentFormat.TEXT, maxRecvDataSegmentLength);
final IDataSegmentIterator iterator = dataSegment.iterator();
final Queue<ProtocolDataUnit> protocolDataUnits = new LinkedList<ProtocolDataUnit>();
IDataSegmentChunk dataSegmentChunk;
ProtocolDataUnit protocolDataUnit;
int bytes2Transfer = dataSegment.getLength();
while (bytes2Transfer > 0 && iterator.hasNext()) {
if (bytes2Transfer <= maxRecvDataSegmentLength) {
// last PDU to send...
dataSegmentChunk = iterator.next(bytes2Transfer);
continueFlag = false;
} else {
dataSegmentChunk = iterator.next(maxRecvDataSegmentLength);
continueFlag = true;
}
finalFlag = !continueFlag;
protocolDataUnit = protocolDataUnitFactory.create(true, finalFlag, OperationCode.LOGIN_REQUEST, "None", "None");
loginRequest = (LoginRequestParser) protocolDataUnit.getBasicHeaderSegment().getParser();
loginRequest.setContinueFlag(continueFlag);
loginRequest.setCurrentStageNumber(connection.getSession().getPhase());
LOGGER.debug("Phase:\n" + loginRequest.getCurrentStageNumber());
if (finalFlag) {
loginRequest.setNextStageNumber(nextStage);
}
loginRequest.setMaxVersion(MAXIMUM_VERSION);
loginRequest.setMinVersion(MINIMUM_VERSION);
loginRequest.setInitiatorSessionID(isid);
loginRequest.setTargetSessionIdentifyingHandle(connection.getSession().getTargetSessionIdentifyingHandle());
protocolDataUnit.setDataSegment(dataSegmentChunk);
protocolDataUnits.offer(protocolDataUnit);
bytes2Transfer -= maxRecvDataSegmentLength;
}
connection.send(protocolDataUnits);
connection.nextState(new LoginResponseState(connection, nextStage));
super.stateFollowing = true;
// return true;
}
// --------------------------------------------------------------------------
// --------------------------------------------------------------------------
// --------------------------------------------------------------------------
// --------------------------------------------------------------------------
}