/**
* 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.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.text.TextRequestParser;
/**
* <h1>GetConnectionsRequestState</h1>
* <p/>
* This state requests a list of all possible connections to a specific target. So it sends a TextRequest PDU with
* <code>SendTargets=</code> as the only <code>OperationalTextKey</code> as data segment.
*
* @author Volker Wildi
*/
public final class GetConnectionsRequestState extends AbstractState {
// --------------------------------------------------------------------------
// --------------------------------------------------------------------------
/**
* Constructor to create a <code>GetConnectionsRequestState</code> instance, which uses the given connection for
* transmission.
*
* @param initConnection The context connection, which is used for the network transmission.
*/
public GetConnectionsRequestState (final Connection initConnection) {
super(initConnection);
}
// --------------------------------------------------------------------------
// --------------------------------------------------------------------------
/** {@inheritDoc} */
public final void execute () throws InternetSCSIException {
final ProtocolDataUnit protocolDataUnit = protocolDataUnitFactory.create(false, true, OperationCode.TEXT_REQUEST, connection.getSetting(OperationalTextKey.HEADER_DIGEST), connection.getSetting(OperationalTextKey.DATA_DIGEST));
final TextRequestParser parser = (TextRequestParser) protocolDataUnit.getBasicHeaderSegment().getParser();
final SettingsMap settings = new SettingsMap();
settings.add(OperationalTextKey.SEND_TARGETS, "");
final IDataSegment dataSegment = DataSegmentFactory.create(settings.asByteBuffer(), DataSegmentFormat.TEXT, connection.getSettingAsInt(OperationalTextKey.MAX_RECV_DATA_SEGMENT_LENGTH));
int bytes2Process = dataSegment.getLength();
for (IDataSegmentIterator dataSegmentIterator = dataSegment.iterator(); dataSegmentIterator.hasNext();) {
IDataSegmentChunk dataSegmentChunk = dataSegmentIterator.next(bytes2Process);
protocolDataUnit.setDataSegment(dataSegmentChunk);
parser.setTargetTransferTag(0xFFFFFFFF);
}
connection.send(protocolDataUnit);
connection.nextState(new GetConnectionsResponseState(connection));
super.stateFollowing = true;
// return true;
}
// --------------------------------------------------------------------------
// --------------------------------------------------------------------------
// --------------------------------------------------------------------------
// --------------------------------------------------------------------------
}