/**
* 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 org.jscsi.exception.InternetSCSIException;
import org.jscsi.initiator.connection.Connection;
import org.jscsi.initiator.connection.phase.FullFeaturePhase;
import org.jscsi.initiator.connection.phase.LoginOperationalNegotiationPhase;
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.OperationalTextKey;
import org.jscsi.parser.login.LoginResponseParser;
import org.jscsi.parser.login.LoginStage;
/**
* <h1>LoginResponseState</h1>
* <p/>
* This state handles a Login Response.
*
* @author Volker Wildi
*/
public final class LoginResponseState extends AbstractState {
// --------------------------------------------------------------------------
// --------------------------------------------------------------------------
/**
* The Next Stage of the login process, that the iSCSI Target wants to
* transit to.
*/
private final LoginStage nextStage;
// --------------------------------------------------------------------------
// --------------------------------------------------------------------------
/**
* Constructor to create a <code>LoginResponseState</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 LoginResponseState(final Connection initConnection, final LoginStage initNextStage, final int initInitiatorTaskTag) {
// OODRIVE
super(initConnection, initInitiatorTaskTag);
nextStage = initNextStage;
}
// --------------------------------------------------------------------------
// --------------------------------------------------------------------------
/** {@inheritDoc} */
public final void execute() throws InternetSCSIException {
ProtocolDataUnit protocolDataUnit;
final IDataSegment loginResponse =
DataSegmentFactory.create(DataSegmentFormat.TEXT, connection
.getSettingAsInt(OperationalTextKey.MAX_RECV_DATA_SEGMENT_LENGTH));
do {
// OODRIVE
protocolDataUnit = connection.receive(initiatorTaskTag);
if (!(protocolDataUnit.getBasicHeaderSegment().getParser() instanceof LoginResponseParser)) {
break;
}
loginResponse.append(protocolDataUnit.getDataSegment(), protocolDataUnit.getBasicHeaderSegment()
.getDataSegmentLength());
} while (!protocolDataUnit.getBasicHeaderSegment().isFinalFlag());
// extract Target Session Handle Identifying Handle
final LoginResponseParser parser =
(LoginResponseParser)protocolDataUnit.getBasicHeaderSegment().getParser();
connection.getSession().setTargetSessionIdentifyingHandle(parser.getTargetSessionIdentifyingHandle());
// Set the Expected Status Sequence Number to the initial value received
// from the target. Then add the constant 2 to this value, because the
// incrementExpectedStatusSequence() method was already invoked.
connection.setExpectedStatusSequenceNumber(parser.getStatusSequenceNumber() + 1);// TODO was +2
// check parameters....
LOGGER.info("Retrieving these login parameters:\n" + loginResponse.getSettings());
connection.update(loginResponse.getSettings());
LOGGER.info("Updated settings to these:\n" + connection.getSettings());
LOGGER.info("Nextstage is : " + nextStage);
// is a transit to the next stage possible
if (protocolDataUnit.getBasicHeaderSegment().isFinalFlag()) {
if (nextStage == LoginStage.LOGIN_OPERATIONAL_NEGOTIATION) {
connection.getSession().setPhase(new LoginOperationalNegotiationPhase());
} else if (nextStage == LoginStage.FULL_FEATURE_PHASE) {
connection.getSession().setPhase(new FullFeaturePhase());
// return false;
}
}
// return true;
}
// --------------------------------------------------------------------------
// --------------------------------------------------------------------------
/** {@inheritDoc} */
@Override
public final Exception isCorrect(final ProtocolDataUnit protocolDataUnit) {
if (protocolDataUnit.getBasicHeaderSegment().getParser() instanceof LoginResponseParser) {
return null;
} else {
return new IllegalStateException(new StringBuilder("Parser ").append(
protocolDataUnit.getBasicHeaderSegment().getParser().toString()).append(" is instance of ")
.append(protocolDataUnit.getBasicHeaderSegment().getParser().getClass().toString()).append(
" and not instance if LoginParser!").toString());
}
}
// --------------------------------------------------------------------------
// --------------------------------------------------------------------------
// --------------------------------------------------------------------------
// --------------------------------------------------------------------------
}