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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 static org.restcomm.protocols.ss7.sccp.impl.message.MessageUtil.calculateRlsdFieldsLengthWithoutData;
import java.io.IOException;
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.ImportanceImpl;
import org.restcomm.protocols.ss7.sccp.impl.parameter.LocalReferenceImpl;
import org.restcomm.protocols.ss7.sccp.impl.parameter.ReleaseCauseImpl;
import org.restcomm.protocols.ss7.sccp.message.ParseException;
import org.restcomm.protocols.ss7.sccp.message.SccpConnRlsdMessage;
import org.restcomm.protocols.ss7.sccp.parameter.Importance;
import org.restcomm.protocols.ss7.sccp.parameter.Parameter;
import org.restcomm.protocols.ss7.sccp.parameter.ParameterFactory;
import org.restcomm.protocols.ss7.sccp.parameter.ReleaseCause;
import org.restcomm.protocols.ss7.sccp.parameter.ReturnCauseValue;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
/**
*
* @author yulianoifa
*
*/
public class SccpConnRlsdMessageImpl extends SccpConnReferencedMessageImpl implements SccpConnRlsdMessage {
protected ReleaseCause releaseCause;
protected ByteBuf userData;
protected Importance importance;
public SccpConnRlsdMessageImpl(int sls, int localSsn) {
super(130, MESSAGE_TYPE_RLSD, sls, localSsn);
}
protected SccpConnRlsdMessageImpl(int incomingOpc, int incomingDpc, int incomingSls, int networkId) {
super(130, MESSAGE_TYPE_RLSD, incomingOpc, incomingDpc, incomingSls, networkId);
}
@Override
public ReleaseCause getReleaseCause() {
return releaseCause;
}
@Override
public void setReleaseCause(ReleaseCause releaseCause) {
this.releaseCause = releaseCause;
}
@Override
public ByteBuf getUserData() {
return Unpooled.wrappedBuffer(userData);
}
@Override
public void setUserData(ByteBuf userData) {
this.userData = userData;
}
@Override
public Importance getImportance() {
return importance;
}
@Override
public void setImportance(Importance importance) {
this.importance = importance;
}
@Override
public void decode(ByteBuf buffer, ParameterFactory factory, SccpProtocolVersion sccpProtocolVersion) throws ParseException {
try {
LocalReferenceImpl ref = new LocalReferenceImpl();
ref.decode(buffer, factory, sccpProtocolVersion);
destinationLocalReferenceNumber = ref;
ref = new LocalReferenceImpl();
ref.decode(buffer, factory, sccpProtocolVersion);
sourceLocalReferenceNumber = ref;
ReleaseCauseImpl cause = new ReleaseCauseImpl();
cause.decode(buffer, factory, sccpProtocolVersion);
releaseCause = cause;
int pointer = buffer.readByte() & 0xff;
buffer.markReaderIndex();
if (pointer == 0) {
// we are done
return;
}
try {
buffer.skipBytes(pointer - 1);
}
catch(IndexOutOfBoundsException ex) {
throw new IOException("Not enough data in buffer");
}
int paramCode = 0;
// EOP
while ((paramCode = buffer.readByte() & 0xFF) != 0) {
if (paramCode != Parameter.DATA_PARAMETER_CODE
&& paramCode != Importance.PARAMETER_CODE) {
throw new ParseException(String.format("Code %d is not supported for RLSD message", paramCode));
}
int len=buffer.readByte();
decodeOptional(paramCode, buffer.slice(buffer.readerIndex(), len), sccpProtocolVersion);
buffer.skipBytes(len);
}
} catch (IOException e) {
throw new ParseException(e);
}
}
@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 (releaseCause == null) {
return new EncodingResultData(EncodingResult.ReleaseCauseMissing, null, null, null);
}
int fieldsLen = calculateRlsdFieldsLengthWithoutData(userData != null, importance != null);
int availLen = maxMtp3UserDataLength - fieldsLen;
if (availLen > 130)
availLen = 130;
int bfLength=0;
if(userData!=null)
bfLength=userData.readableBytes();
if (bfLength > availLen) { // message is too long
if (logger.isWarnEnabled()) {
logger.warn(String.format(
"Failure when sending a RLSD message: message is too long. SccpMessageSegment=%s", this));
}
return new EncodingResultData(EncodingResult.ReturnFailure, null, null, ReturnCauseValue.SEG_NOT_SUPPORTED);
}
ByteBuf out = Unpooled.buffer(fieldsLen);
out.writeByte(type);
((LocalReferenceImpl) destinationLocalReferenceNumber).encode(out, sccpStackImpl.isRemoveSpc(), sccpStackImpl.getSccpProtocolVersion());
((LocalReferenceImpl) sourceLocalReferenceNumber).encode(out, sccpStackImpl.isRemoveSpc(), sccpStackImpl.getSccpProtocolVersion());
((ReleaseCauseImpl)releaseCause).encode(out, sccpStackImpl.isRemoveSpc(), sccpStackImpl.getSccpProtocolVersion());
// we have 1 pointers (optionals), cdp starts after 1 octets then
int len = 1;
boolean optionalPresent = false;
if (userData != null || importance != null) {
out.writeByte(len); // optionals pointer
optionalPresent = true;
} else {
// in case there is no optional
out.writeByte(0);
}
if (userData != null) {
out.writeByte(Parameter.DATA_PARAMETER_CODE);
out.writeByte(userData.readableBytes());
out=Unpooled.wrappedBuffer(out,userData);
}
if (importance != null) {
out.writeByte(Importance.PARAMETER_CODE);
out.writeByte(1);
((ImportanceImpl)importance).encode(out, removeSPC, sccpProtocolVersion);
}
if (optionalPresent) {
out.writeByte(0x00);
}
return new EncodingResultData(EncodingResult.Success, out, null, null);
}
protected void decodeOptional(int code, ByteBuf buffer, final SccpProtocolVersion sccpProtocolVersion) throws ParseException {
switch (code) {
case Parameter.DATA_PARAMETER_CODE:
userData = Unpooled.wrappedBuffer(buffer);
break;
case Importance.PARAMETER_CODE:
ImportanceImpl imp = new ImportanceImpl();
imp.decode(buffer, null, sccpProtocolVersion);
importance = imp;
break;
default:
throw new ParseException("Unknown optional parameter code: " + code);
}
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append("Sccp Msg [Type=Rlsd");
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(" DataLen=");
if (this.userData != null)
sb.append(this.userData.readableBytes());
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(" releaseCause=");
if (this.releaseCause != null)
sb.append(this.releaseCause.getValue());
sb.append(" importance=");
if (this.importance != null)
sb.append(this.importance.getValue());
sb.append(" isMtpOriginated=");
sb.append(this.isMtpOriginated);
sb.append("]");
return sb.toString();
}
}
