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org.restcomm.protocols.ss7.sccp.impl.message.SccpConnCrMessageImpl Maven / Gradle / Ivy
/*
* 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 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.CreditImpl;
import org.restcomm.protocols.ss7.sccp.impl.parameter.HopCounterImpl;
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.ProtocolClassImpl;
import org.restcomm.protocols.ss7.sccp.impl.parameter.SccpAddressImpl;
import org.restcomm.protocols.ss7.sccp.message.ParseException;
import org.restcomm.protocols.ss7.sccp.message.SccpConnCrMessage;
import org.restcomm.protocols.ss7.sccp.parameter.Credit;
import org.restcomm.protocols.ss7.sccp.parameter.HopCounter;
import org.restcomm.protocols.ss7.sccp.parameter.Importance;
import org.restcomm.protocols.ss7.sccp.parameter.LocalReference;
import org.restcomm.protocols.ss7.sccp.parameter.Parameter;
import org.restcomm.protocols.ss7.sccp.parameter.ParameterFactory;
import org.restcomm.protocols.ss7.sccp.parameter.ProtocolClass;
import org.restcomm.protocols.ss7.sccp.parameter.SccpAddress;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
/**
*
* @author yulianoifa
*
*/
public class SccpConnCrMessageImpl extends SccpAddressedMessageImpl implements SccpConnCrMessage {
protected LocalReference sourceLocalReferenceNumber;
protected ProtocolClass protocolClass;
protected Credit credit;
protected ByteBuf userData;
protected Importance importance;
public SccpConnCrMessageImpl(int sls, int localSsn, SccpAddress calledParty, SccpAddress callingParty, HopCounter hopCounter) {
super(130, MESSAGE_TYPE_CR, sls, localSsn, calledParty, callingParty, hopCounter);
}
public SccpConnCrMessageImpl(int incomingOpc, int incomingDpc, int incomingSls, int networkId) {
super(130, MESSAGE_TYPE_CR, incomingOpc, incomingDpc, incomingSls, networkId);
}
@Override
public LocalReference getSourceLocalReferenceNumber() {
return sourceLocalReferenceNumber;
}
@Override
public void setSourceLocalReferenceNumber(LocalReference sourceLocalReferenceNumber) {
this.sourceLocalReferenceNumber = sourceLocalReferenceNumber;
}
@Override
public ProtocolClass getProtocolClass() {
return protocolClass;
}
@Override
public void setProtocolClass(ProtocolClass protocolClass) {
this.protocolClass = protocolClass;
}
@Override
public Credit getCredit() {
return credit;
}
@Override
public void setCredit(Credit credit) {
this.credit = credit;
}
@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);
sourceLocalReferenceNumber = ref;
ProtocolClassImpl protocol = new ProtocolClassImpl();
protocol.decode(buffer, factory, sccpProtocolVersion);
protocolClass = protocol;
int cpaPointer = buffer.readByte() & 0xFF;
buffer.markReaderIndex();
buffer.skipBytes(cpaPointer - 1);
int len=buffer.readByte();
calledParty = createAddress(buffer.slice(buffer.readerIndex(), len), factory, sccpProtocolVersion);
buffer.resetReaderIndex();
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 != Credit.PARAMETER_CODE
&& paramCode != SccpAddress.CGA_PARAMETER_CODE
&& paramCode != Parameter.DATA_PARAMETER_CODE
&& paramCode != HopCounter.PARAMETER_CODE
&& paramCode != Importance.PARAMETER_CODE) {
throw new ParseException(String.format("Code %d is not supported for CR message", paramCode));
}
len = buffer.readByte() & 0xff;
decodeOptional(paramCode, buffer.slice(buffer.readerIndex(), len), sccpProtocolVersion, factory);
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 (sourceLocalReferenceNumber == null) {
return new EncodingResultData(EncodingResult.SourceLocalReferenceNumberMissing, null, null, null);
}
if (protocolClass == null) {
return new EncodingResultData(EncodingResult.ProtocolClassMissing, null, null, null);
}
if (calledParty == null) {
return new EncodingResultData(EncodingResult.CalledPartyAddressMissing, null, null, null);
}
ByteBuf cdp=Unpooled.buffer();
((SccpAddressImpl) calledParty).encode(cdp, sccpStackImpl.isRemoveSpc(), sccpStackImpl.getSccpProtocolVersion());
ByteBuf cnp = null;
if (callingParty != null) {
cnp=Unpooled.buffer();
((SccpAddressImpl) callingParty).encode(cnp, sccpStackImpl.isRemoveSpc(), sccpStackImpl.getSccpProtocolVersion());
}
int cnpLength=0;
if(cnp!=null)
cnpLength=cnp.readableBytes();
int fieldsLen = MessageUtil.calculateCrFieldsLengthWithoutData(cdp.readableBytes(), credit != null, cnpLength,
hopCounter != null, importance != null);
int availLen = maxMtp3UserDataLength - fieldsLen;
if (availLen > 130)
availLen = 130;
int bfLength=0;
if(userData!=null)
bfLength=userData.readableBytes();
if (bfLength > availLen) {
if (logger.isWarnEnabled()) {
logger.warn(String.format(
"Failure when sending a CR message: message is too long. SccpMessageSegment=%s", this));
}
return new EncodingResultData(EncodingResult.SegmentationNotSupported, null, null, null);
}
ByteBuf out = Unpooled.buffer(fieldsLen);
out.writeByte(type);
((LocalReferenceImpl) sourceLocalReferenceNumber).encode(out, sccpStackImpl.isRemoveSpc(), sccpStackImpl.getSccpProtocolVersion());
((ProtocolClassImpl) protocolClass).encode(out, sccpStackImpl.isRemoveSpc(), sccpStackImpl.getSccpProtocolVersion());
// we have 2 pointers (cdp, optionals), cdp starts after 2 octets then
int len = 2;
out.writeByte(len); //cdp pointer
boolean optionalPresent = false;
if (credit != null || callingParty != null || userData != null || hopCounter != null || importance != null) {
len += cdp.readableBytes();
out.writeByte(len); // optionals pointer
optionalPresent = true;
} else {
// in case there is no optional
out.writeByte(0);
}
out.writeByte(cdp.readableBytes());
out.writeBytes(cdp);
if (credit != null) {
out.writeByte(Credit.PARAMETER_CODE);
out.writeByte(1);
((CreditImpl)credit).encode(out,removeSPC, sccpProtocolVersion);
}
if (callingParty != null) {
out.writeByte(SccpAddress.CGA_PARAMETER_CODE);
out.writeByte(cnp.readableBytes());
out.writeBytes(cnp);
}
if (userData != null) {
out.writeByte(Parameter.DATA_PARAMETER_CODE);
out.writeByte(userData.readableBytes());
out=Unpooled.wrappedBuffer(out,userData);
}
if (hopCounter != null) {
out.writeByte(HopCounter.PARAMETER_CODE);
out.writeByte(1);
((HopCounterImpl)hopCounter).encode(out,removeSPC, sccpProtocolVersion);
}
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, ParameterFactory factory) throws ParseException {
switch (code) {
case Credit.PARAMETER_CODE:
CreditImpl cred = new CreditImpl();
cred.decode(buffer, factory, sccpProtocolVersion);
credit = cred;
break;
case SccpAddress.CGA_PARAMETER_CODE:
SccpAddressImpl address = new SccpAddressImpl();
address.decode(buffer, factory, sccpProtocolVersion);
callingParty = address;
break;
case SccpAddress.CDA_PARAMETER_CODE:
SccpAddressImpl address2 = new SccpAddressImpl();
address2.decode(buffer, factory, sccpProtocolVersion);
calledParty = address2;
break;
case Parameter.DATA_PARAMETER_CODE:
userData = buffer;
break;
case HopCounter.PARAMETER_CODE:
HopCounterImpl counter = new HopCounterImpl(buffer.readByte());
hopCounter = counter;
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);
}
}
protected SccpAddress createAddress(ByteBuf buffer, ParameterFactory factory, SccpProtocolVersion sccpProtocolVersion) throws ParseException {
SccpAddressImpl addressImpl = new SccpAddressImpl();
addressImpl.decode(buffer, factory, sccpProtocolVersion);
return addressImpl;
}
public boolean reduceHopCounter() {
if (this.hopCounter != null) {
int val = this.hopCounter.getValue();
if (--val <= 0) {
val = 0;
}
((HopCounterImpl)this.hopCounter).setValue(val);
if (val == 0)
return false;
}
return true;
}
public boolean getSccpCreatesSls() {
return false;
}
@Override
public boolean getReturnMessageOnError() {
throw new IllegalStateException();
}
@Override
public void clearReturnMessageOnError() {
throw new IllegalStateException();
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append("Sccp Msg [Type=CR");
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(" CallingAddress(");
sb.append(this.callingParty);
sb.append(") CalledParty(");
sb.append(this.calledParty);
sb.append(")");
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(" protocolClass=");
if (this.protocolClass != null)
sb.append(this.protocolClass.getProtocolClass());
sb.append(" credit=");
if (this.credit != null)
sb.append(this.credit.getValue());
sb.append(" importance=");
if (this.importance != null)
sb.append(this.importance.getValue());
sb.append(" hopCounter=");
if (this.hopCounter != null)
sb.append(this.hopCounter.getValue());
sb.append(" isMtpOriginated=");
sb.append(this.isMtpOriginated);
sb.append("]");
return sb.toString();
}
}
