/*
* TeleStax, Open Source Cloud Communications Copyright 2012.
* 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.mobicents.protocols.ss7.tcap.asn;
import java.io.IOException;
import org.mobicents.protocols.asn.AsnException;
import org.mobicents.protocols.asn.AsnInputStream;
import org.mobicents.protocols.asn.AsnOutputStream;
import org.mobicents.protocols.asn.Tag;
import org.mobicents.protocols.ss7.tcap.asn.comp.PAbortCauseType;
/**
* @author baranowb
* @author sergey vetyutnev
* @author alerant appngin
*
*/
public class DialogRequestAPDUImpl implements DialogRequestAPDU {
private ApplicationContextName acn;
private UserInformation ui;
private ProtocolVersion protocolVersion = new ProtocolVersionImpl();
private boolean doNotSendProtocolVersion = false;
private boolean malformedUserInformation = false;
public DialogRequestAPDUImpl() {
}
public void setDoNotSendProtocolVersion(boolean val) {
doNotSendProtocolVersion = val;
}
/*
* (non-Javadoc)
*
* @seeorg.mobicents.protocols.ss7.tcap.asn.DialogRequestAPDU# getApplicationContextName()
*/
public ApplicationContextName getApplicationContextName() {
return acn;
}
/*
* (non-Javadoc)
*
* @see org.mobicents.protocols.ss7.tcap.asn.DialogRequestAPDU#getProtocolVersion ()
*/
public ProtocolVersion getProtocolVersion() {
return protocolVersion;
}
/*
* (non-Javadoc)
*
* @see org.mobicents.protocols.ss7.tcap.asn.DialogRequestAPDU#getUserInformation ()
*/
public UserInformation getUserInformation() {
return this.ui;
}
/*
* (non-Javadoc)
*
* @seeorg.mobicents.protocols.ss7.tcap.asn.DialogRequestAPDU# setApplicationContextName
* (org.mobicents.protocols.ss7.tcap.asn.ApplicationContextName)
*/
public void setApplicationContextName(ApplicationContextName acn) {
this.acn = acn;
}
/*
* (non-Javadoc)
*
* @see org.mobicents.protocols.ss7.tcap.asn.DialogRequestAPDU#setUserInformation
* (org.mobicents.protocols.ss7.tcap.asn.UserInformation[])
*/
public void setUserInformation(UserInformation ui) {
this.ui = ui;
}
/*
* (non-Javadoc)
*
* @see org.mobicents.protocols.ss7.tcap.asn.DialogAPDU#getType()
*/
public DialogAPDUType getType() {
return DialogAPDUType.Request;
}
/*
* (non-Javadoc)
*
* @see org.mobicents.protocols.ss7.tcap.asn.DialogAPDU#isUniDirectional()
*/
public boolean isUniDirectional() {
return false;
}
/**
* Return true if the decoded request contained malformed User Information element
*
* @return true if the decoded request contained malformed User Information element
*/
public boolean isMalformedUserInformation() {
return malformedUserInformation;
}
public String toString() {
return "DialogRequestAPDU[acn=" + acn + ", ui=" + (malformedUserInformation ? "<MALFORMED>" : ui) + "]";
}
/*
* (non-Javadoc)
*
* @see org.mobicents.protocols.ss7.tcap.asn.Encodable#decode(org.mobicents.protocols .asn.AsnInputStream)
*/
public void decode(AsnInputStream ais) throws ParseException {
try {
AsnInputStream localAis = ais.readSequenceStream();
int tag = localAis.readTag();
// optional protocol version
if (tag == ProtocolVersion._TAG_PROTOCOL_VERSION && localAis.getTagClass() == Tag.CLASS_CONTEXT_SPECIFIC) {
// we have protocol version on a
// decode it
this.protocolVersion = TcapFactory.createProtocolVersion(localAis);
tag = localAis.readTag();
}
// now there is mandatory part
if (tag != ApplicationContextName._TAG || localAis.getTagClass() != Tag.CLASS_CONTEXT_SPECIFIC)
throw new ParseException(PAbortCauseType.IncorrectTxPortion, null,
"Error decoding DialogRequestAPDU.application-context-name: bad tag or tagClass, found tag=" + tag
+ ", tagClass=" + localAis.getTagClass());
this.acn = TcapFactory.createApplicationContextName(localAis);
// optional sequence.
if (localAis.available() > 0) {
// we have optional seq;
tag = localAis.readTag();
if (tag != UserInformation._TAG || localAis.getTagClass() != Tag.CLASS_CONTEXT_SPECIFIC)
throw new ParseException(PAbortCauseType.IncorrectTxPortion, null,
"Error decoding DialogRequestAPDU.user-information: bad tag or tagClass, found tag=" + tag
+ ", tagClass=" + localAis.getTagClass());
// Ensure all data is read even in case of malformed user information content.
// Don't throw exception, as user info is not necessary to establish the dialog;
// if TC-User requires ui to be present, it can always send TC-U-Abort.
int uiPos = localAis.position();
try {
this.ui = TcapFactory.createUserInformation(localAis);
} catch (ParseException uiEx) {
this.ui = null;
malformedUserInformation = true;
localAis.position(uiPos); // "reset"
localAis.advanceElement(); // advance without parsing the element
}
}
} catch (IOException e) {
throw new ParseException(PAbortCauseType.BadlyFormattedTxPortion, null,
"IOException while decoding DialogRequestAPDU: " + e.getMessage(), e);
} catch (AsnException e) {
throw new ParseException(PAbortCauseType.BadlyFormattedTxPortion, null,
"AsnException while decoding DialogRequestAPDU: " + e.getMessage(), e);
}
}
/*
* (non-Javadoc)
*
* @see org.mobicents.protocols.ss7.tcap.asn.Encodable#encode(org.mobicents.protocols .asn.AsnOutputStream)
*/
public void encode(AsnOutputStream aos) throws EncodeException {
if (acn == null)
throw new EncodeException("Error encoding DialogRequestAPDU: Application Context Name must not be null");
try {
aos.writeTag(Tag.CLASS_APPLICATION, false, _TAG_REQUEST);
int pos = aos.StartContentDefiniteLength();
if (!doNotSendProtocolVersion)
this.protocolVersion.encode(aos);
this.acn.encode(aos);
if (ui != null)
ui.encode(aos);
aos.FinalizeContent(pos);
} catch (AsnException e) {
throw new EncodeException("IOException while encoding DialogRequestAPDU: " + e.getMessage(), e);
}
}
}