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/*
* JBoss, Home of Professional Open Source
* Copyright 2011, Red Hat, Inc. and individual contributors
* Copyright 2019, Mobius Software LTD and individual contributors
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.restcomm.protocols.ss7.sccp.impl.message;
import org.apache.logging.log4j.Logger;
import org.restcomm.protocols.ss7.sccp.LongMessageRuleType;
import org.restcomm.protocols.ss7.sccp.SccpProtocolVersion;
import org.restcomm.protocols.ss7.sccp.impl.SccpStackImpl;
import org.restcomm.protocols.ss7.sccp.impl.parameter.CreditImpl;
import org.restcomm.protocols.ss7.sccp.impl.parameter.LocalReferenceImpl;
import org.restcomm.protocols.ss7.sccp.impl.parameter.ProtocolClassImpl;
import org.restcomm.protocols.ss7.sccp.impl.parameter.SequencingSegmentingImpl;
import org.restcomm.protocols.ss7.sccp.message.ParseException;
import org.restcomm.protocols.ss7.sccp.message.SccpConnItMessage;
import org.restcomm.protocols.ss7.sccp.parameter.Credit;
import org.restcomm.protocols.ss7.sccp.parameter.ParameterFactory;
import org.restcomm.protocols.ss7.sccp.parameter.ProtocolClass;
import org.restcomm.protocols.ss7.sccp.parameter.SequenceNumber;
import org.restcomm.protocols.ss7.sccp.parameter.SequencingSegmenting;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
/**
*
* @author yulianoifa
*
*/
public class SccpConnItMessageImpl extends SccpConnReferencedMessageImpl implements SccpConnItMessage {
protected ProtocolClass protocolClass;
protected SequencingSegmenting sequencingSegmenting;
protected Credit credit;
public SccpConnItMessageImpl(int sls, int localSsn) {
super(0, MESSAGE_TYPE_IT, sls, localSsn);
}
public SccpConnItMessageImpl(int incomingOpc, int incomingDpc, int incomingSls, int networkId) {
super(0, MESSAGE_TYPE_IT, incomingOpc, incomingDpc, incomingSls, networkId);
}
@Override
public ProtocolClass getProtocolClass() {
return protocolClass;
}
@Override
public void setProtocolClass(ProtocolClass value) {
this.protocolClass = value;
}
@Override
public SequencingSegmenting getSequencingSegmenting() {
return sequencingSegmenting;
}
@Override
public void setSequencingSegmenting(SequencingSegmenting value) {
this.sequencingSegmenting = value;
}
@Override
public Credit getCredit() {
return credit;
}
@Override
public void setCredit(Credit value) {
this.credit = value;
}
@Override
public void decode(ByteBuf buffer, ParameterFactory factory, SccpProtocolVersion sccpProtocolVersion) throws ParseException {
LocalReferenceImpl ref = new LocalReferenceImpl();
ref.decode(buffer, factory, sccpProtocolVersion);
destinationLocalReferenceNumber = ref;
ref = new LocalReferenceImpl();
ref.decode(buffer, factory, sccpProtocolVersion);
sourceLocalReferenceNumber = ref;
ProtocolClassImpl protocol = new ProtocolClassImpl();
protocol.decode(buffer, factory, sccpProtocolVersion);
protocolClass = protocol;
if (protocol.getProtocolClass() != 2) {
SequencingSegmentingImpl sequencing = new SequencingSegmentingImpl();
sequencing.decode(buffer, factory, sccpProtocolVersion);
sequencingSegmenting = sequencing;
CreditImpl cred = new CreditImpl();
cred.decode(buffer, factory, sccpProtocolVersion);
credit = cred;
}
}
@Override
public EncodingResultData encode(SccpStackImpl sccpStackImpl, LongMessageRuleType longMessageRuleType, int maxMtp3UserDataLength, Logger logger, boolean removeSPC, SccpProtocolVersion sccpProtocolVersion) throws ParseException {
if (type == 0) {
return new EncodingResultData(EncodingResult.MessageTypeMissing, null, null, null);
}
if (destinationLocalReferenceNumber == null) {
return new EncodingResultData(EncodingResult.DestinationLocalReferenceNumberMissing, null, null, null);
}
if (sourceLocalReferenceNumber == null) {
return new EncodingResultData(EncodingResult.SourceLocalReferenceNumberMissing, null, null, null);
}
if (protocolClass == null) {
return new EncodingResultData(EncodingResult.ProtocolClassMissing, null, null, null);
}
if (sequencingSegmenting == null) {
return new EncodingResultData(EncodingResult.SequencingSegmentingMissing, null, null, null);
}
if (credit == null) {
return new EncodingResultData(EncodingResult.CreditMissing, null, null, null);
}
// 11 is sum of 6 fixed-length field lengths
ByteBuf out = Unpooled.buffer(11);
out.writeByte(type);
((LocalReferenceImpl) destinationLocalReferenceNumber).encode(out,sccpStackImpl.isRemoveSpc(), sccpStackImpl.getSccpProtocolVersion());
((LocalReferenceImpl) sourceLocalReferenceNumber).encode(out,sccpStackImpl.isRemoveSpc(), sccpStackImpl.getSccpProtocolVersion());
((ProtocolClassImpl) protocolClass).encode(out,sccpStackImpl.isRemoveSpc(), sccpStackImpl.getSccpProtocolVersion());
((SequencingSegmentingImpl) sequencingSegmenting).encode(out,sccpStackImpl.isRemoveSpc(), sccpStackImpl.getSccpProtocolVersion());
((CreditImpl) credit).encode(out,sccpStackImpl.isRemoveSpc(), sccpStackImpl.getSccpProtocolVersion());
return new EncodingResultData(EncodingResult.Success, out, null, null);
}
public boolean isMoreData() {
return sequencingSegmenting.isMoreData();
}
public void setMoreData(boolean moreData) {
if (sequencingSegmenting == null) {
// sendSequenceNumber and receiveSequenceNumber are later re-initialized in MessageSender
sequencingSegmenting = new SequencingSegmentingImpl();
}
sequencingSegmenting.setMoreData(moreData);
}
public void setSequencing(SequenceNumber sendSequenceNumber, SequenceNumber receiveSequenceNumber) {
if (sequencingSegmenting == null) {
// sendSequenceNumber and receiveSequenceNumber are later re-initialized in MessageSender
sequencingSegmenting = new SequencingSegmentingImpl();
}
sequencingSegmenting.setSendSequenceNumber(sendSequenceNumber);
sequencingSegmenting.setReceiveSequenceNumber(receiveSequenceNumber);
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append("Sccp Msg [Type=IT");
sb.append(" networkId=");
sb.append(this.networkId);
sb.append(" sls=");
sb.append(this.sls);
sb.append(" incomingOpc=");
sb.append(this.incomingOpc);
sb.append(" incomingDpc=");
sb.append(this.incomingDpc);
sb.append(" outgoingDpc=");
sb.append(this.outgoingDpc);
sb.append(" sourceLR=");
if (this.sourceLocalReferenceNumber != null)
sb.append(this.sourceLocalReferenceNumber.getValue());
sb.append(" destLR=");
if (this.destinationLocalReferenceNumber != null)
sb.append(this.destinationLocalReferenceNumber.getValue());
sb.append(" protocolClass=");
if (this.protocolClass != null)
sb.append(this.protocolClass.getProtocolClass());
sb.append(" sequencingSegmenting=");
if (this.sequencingSegmenting != null)
sb.append(this.sequencingSegmenting);
sb.append(" credit=");
if (this.credit != null)
sb.append(this.credit.getValue());
sb.append(" isMtpOriginated=");
sb.append(this.isMtpOriginated);
sb.append("]");
return sb.toString();
}
}
