messageprocessing.java

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 * The Apache Software License, Version 1.1
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 * Copyright (c) 2000 The Apache Software Foundation.  All rights
 * reserved.
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 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    distribution.
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 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
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 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
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 * Portions of this software are based upon public domain software
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package net.java.mais.sip.simple;

import java.text.ParseException;
import java.util.ArrayList;

import javax.sip.ClientTransaction;
import javax.sip.InvalidArgumentException;
import javax.sip.ServerTransaction;
import javax.sip.SipException;
import javax.sip.TransactionUnavailableException;
import javax.sip.address.Address;
import javax.sip.address.URI;
import javax.sip.header.CSeqHeader;
import javax.sip.header.CallIdHeader;
import javax.sip.header.ContentLengthHeader;
import javax.sip.header.ContentTypeHeader;
import javax.sip.header.ExpiresHeader;
import javax.sip.header.FromHeader;
import javax.sip.header.MaxForwardsHeader;
import javax.sip.header.ToHeader;
import javax.sip.message.Request;
import javax.sip.message.Response;

import net.java.mais.common.Utils;
import net.java.mais.sip.CommunicationsException;
import net.java.mais.sip.SipManager;
import net.java.mais.sip.security.SipSecurityException;

/**
 * <p>Title: Netsite TudoMais</p>
 * <p>Description:JAIN-SIP Audio/Video phone application</p>
 * <p>Copyright: Copyright (c) 2006</p>
 * <p>Organisation: CTBC Telecom / Netsite </p>
 * @author Thiago Rocha Camargo ([e-mail])
 */

/**
 * <p>Title: SIP COMMUNICATOR-1.1</p>
 * <p>Description: JAIN-SIP-1.1 Audio/Video Phone Application</p>
 * <p>Copyright: Copyright (c) 2003</p>
 * <p>Company: Organisation: LSIIT Laboratory (http://lsiit.u-strasbg.fr)<p>
 * </p>Network Research Team (http://www-r2.u-strasbg.fr))<p>
 * </p>Louis Pasteur University - Strasbourg - France</p>
 * @author Emil Ivov
 * @version 1.1
 */
public class MessageProcessing
{
    protected SipManager sipManCallback = null;

    public MessageProcessing()
    {
        try {
            
        }
        finally {
            
        }
    }

    public MessageProcessing(SipManager sipManCallback)
    {
        this.sipManCallback = sipManCallback;
    }

    public void setSipManagerCallBack(SipManager sipManCallback)
    {
        this.sipManCallback = sipManCallback;
    }


    /**
     * Attempts to re-generate the corresponding request with the proper
     * credentials and terminates the call if it fails.
     *
     * @param clientTransaction the corresponding transaction
     * @param response the challenge
     */
    void processAuthenticationChallenge(ClientTransaction clientTransaction,
                                        Response response)
    {
        try {
            

            Request challengedRequest = clientTransaction.getRequest();
            Request reoriginatedRequest = null;

            ClientTransaction retryTran = sipManCallback.sipSecurityManager.
                    handleChallenge(response, clientTransaction);

            retryTran.sendRequest();
        }
        catch (SipSecurityException exc) {
            sipManCallback.fireCommunicationsError(
                new CommunicationsException("Authorization failed!", exc));
        }
        catch (Exception exc) {
            sipManCallback.fireCommunicationsError(
                new CommunicationsException("Failed to resend a request "
                                            + "after a security challenge!",
                                            exc)
                );
        }
        finally {
            
        }
    }


    /**
     * Process MESSAGE requests and send OK response.
     *
     * @param serverTransaction
     * @param request
     */
    public void processMessageRequest(ServerTransaction serverTransaction, Request request)
    {
        try {
            

            //Send OK
            Response ok = null;
            try {
                ok = sipManCallback.messageFactory.
                    createResponse(Response.OK, request);
                //sipManCallback.attachToTag(ok, serverTransaction.getDialog());
            }
            catch (ParseException ex) {
                sipManCallback.fireCommunicationsError(
                    new CommunicationsException(
                    "Failed to construct an OK response to a MESSAGE request!",
                    ex)
                    );
                return;
            }
            try {
                serverTransaction.sendResponse(ok);
                    
            }
            catch (SipException ex) {
                //This is not really a problem according to the RFC
                //so just dump to stdout should someone be interested
            }
        }
        finally {
            
        }
    }

    public void sendKeepAlive()
     throws CommunicationsException
{
    	
    	String to= "";
    	byte[] messageBody = "".getBytes();
    	
    	try
        {
            
            to = to.trim();
            //Handle default domain name (i.e. transform 1234 -> [e-mail]
            String defaultDomainName =
               Utils.getProperty("net.java.mais.sip.DEFAULT_DOMAIN_NAME");
            if (defaultDomainName != null //no sip scheme
                && !to.trim().startsWith("tel:")
                && to.indexOf('@') == -1 //most probably a sip uri
                ) {
                    to = to + "@" + defaultDomainName;
            }

            //Let's be uri fault tolerant
            if (to.toLowerCase().indexOf("sip:") == -1 //no sip scheme
                && to.indexOf('@') != -1 //most probably a sip uri
                ) {
                    to = "sip:" + to;
            }

            //Request URI
            URI requestURI;
            try {
                requestURI = sipManCallback.addressFactory.createURI(to);
            }
            catch (ParseException ex) {
                
                throw new CommunicationsException(to +
                                                  " is not a legal SIP uri!", ex);
            }
            //Call ID
            CallIdHeader callIdHeader = sipManCallback.sipProvider.getNewCallId();
            //CSeq
            CSeqHeader cSeqHeader;
            try {
                cSeqHeader = sipManCallback.headerFactory.createCSeqHeader(1,
                    Request.MESSAGE);
            }
            catch (Exception ex) {
                //Shouldn't happen
                throw new CommunicationsException(
                    "An unexpected erro occurred while"
                    + "constructing the CSeqHeadder", ex);
            }
            //FromHeader
            FromHeader fromHeader = sipManCallback.getFromHeader();
            //ToHeader
            Address toAddress = sipManCallback.addressFactory.createAddress(
                requestURI);
            ToHeader toHeader;
            try {
                toHeader = sipManCallback.headerFactory.createToHeader(
                    toAddress, null);
            }
            catch (ParseException ex) {
                //Shouldn't happen
                throw new CommunicationsException(
                    "Null is not an allowed tag for the to header!", ex);
            }