call.java

基于MJSIP的j2me客户端

/*
 * Copyright (C) 2005 Luca Veltri - University of Parma - Italy
 * 
 * This file is part of MjSip (http://www.mjsip.org)
 * 
 * MjSip is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 * 
 * MjSip 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 General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with MjSip; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 * 
 * Author(s):
 * Luca Veltri ([e-mail])
 */

package org.zoolu.sip.call;


import org.zoolu.sip.dialog.*;
import org.zoolu.sip.provider.*;
import org.zoolu.sip.message.*;
import org.zoolu.sip.address.NameAddress;
import org.zoolu.sip.header.MultipleHeader;
import org.zoolu.tools.Log;
import org.zoolu.tools.LogLevel;
import org.zoolu.sdp.*;
import java.util.Vector;


/** Class Call implements SIP calls.
  * <p>It handles both outgoing or incoming calls.
  * <p>Both offer/answer models are supported, that is:
  * <br> i) offer/answer in invite/2xx, or
  * <br> ii) offer/answer in 2xx/ack
  */
public class Call implements InviteDialogListener
{  
   /** Event logger. */
   Log log;

   /** The SipProvider used for the call */
   protected SipProvider sip_provider;
   
   /** The invite dialog (sip.dialog.InviteDialog) */
   protected InviteDialog dialog;
   
   /** The user url (AOR) */
   protected String from_url;

   /** The user contact url */
   protected String contact_url;

   /** The local sdp */
   protected String local_sdp;

   /** The remote sdp */
   protected String remote_sdp;
   
   /** The call listener (sipx.call.CallListener) */
   CallListener listener;

   
   /** Creates a new Call. */
   public Call(SipProvider sip_provider, String from_url, String contact_url, CallListener call_listener)
   {  this.sip_provider=sip_provider;
      this.log=sip_provider.getLog();
      this.listener=call_listener;
      this.from_url=from_url;
      this.contact_url=contact_url;
      this.dialog=null;
      this.local_sdp=null;
      this.remote_sdp=null;
   }

   /** Creates a new Call specifing the sdp */
   /*public Call(SipProvider sip_provider, String from_url, String contact_url, String sdp, CallListener call_listener)
   {  this.sip_provider=sip_provider;
      this.log=sip_provider.getLog();
      this.listener=call_listener;
      this.from_url=from_url;
      this.contact_url=contact_url;
      local_sdp=sdp;
   }*/

   /** Creates a new Call for the already received INVITE request <i>invite</i>. */
   public Call(SipProvider sip_provider, Message invite, String contact_url, CallListener call_listener)
   {  this.sip_provider=sip_provider;
      this.log=sip_provider.getLog();
      this.listener=call_listener;
      this.from_url=invite.getToHeader().getNameAddress().toString();
      this.contact_url=contact_url;
      this.dialog=new InviteDialog(sip_provider,invite,this);
      this.local_sdp=null;
      this.remote_sdp=invite.getBody();
   }

   /** Gets the current invite dialog */
   /*public InviteDialog getInviteDialog()
   {  return dialog;
   }*/

   /** Gets the current call-id */
   public String getCallId()
   {  if (dialog==null) return null;
      else return dialog.getCallID();
   }

   /** Gets the current local session descriptor */
   public String getLocalSessionDescriptor()
   {  return local_sdp;
   }
   
   /** Sets a new local session descriptor */
   public void setLocalSessionDescriptor(String sdp)
   {  local_sdp=sdp;
   }

   /** Gets the current remote session descriptor */
   public String getRemoteSessionDescriptor()
   {  return remote_sdp;
   } 
   
   /** Whether the call is on (active). */
   public boolean isOnCall()
   {  return dialog.isSessionActive();
   } 
         
   /** Waits for an incoming call */
   public void listen()
   {  dialog=new InviteDialog(sip_provider,this);
      dialog.listen();
   }

   /** Starts a new call, inviting a remote user (<i>callee</i>) */
   public void call(String callee)
   {  call(callee,null,null,null);
   } 

   /** Starts a new call, inviting a remote user (<i>callee</i>) */
   public void call(String callee, String sdp)
   {  call(callee,null,null,sdp);
   } 

   /** Starts a new call, inviting a remote user (<i>callee</i>) */
   public void call(String callee, String from, String contact, String sdp)
   {  printLog("calling "+callee,LogLevel.HIGH);
      if (from==null) from=from_url;
      if (contact==null) contact=contact_url;
      if (sdp!=null) local_sdp=sdp;
      dialog=new InviteDialog(sip_provider,this);
      if (local_sdp!=null)
         dialog.invite(callee,from,contact,local_sdp);
      else dialog.inviteWithoutOffer(callee,from,contact);
   } 

   /** Starts a new call with the <i>invite</i> message request */
   public void call(Message invite)
   {  dialog=new InviteDialog(sip_provider,this);
      local_sdp=invite.getBody();
      if (local_sdp!=null)
         dialog.invite(invite);
      else dialog.inviteWithoutOffer(invite);
   } 

   /** Answers at the 2xx/offer (in the ack message) */
   public void ackWithAnswer(String sdp)
   {  local_sdp=sdp;
      dialog.ackWithAnswer(contact_url,sdp);
   } 

   /** Rings back for the incoming call */
   public void ring()
   {  if (dialog!=null) dialog.ring();
   }    

   /** Respond to a incoming call (invite) with <i>resp</i> */
   public void respond(Message resp)
   {  if (dialog!=null) dialog.respond(resp);
   }    

   /** Accepts the incoming call */
   /*public void accept()