/**
* BigBlueButton open source conferencing system - http://www.bigbluebutton.org/
*
* Copyright (c) 2012 BigBlueButton Inc. and by respective authors (see below).
*
* This program 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 3.0 of the License, or (at your option) any later
* version.
*
* BigBlueButton 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 BigBlueButton; if not, see <http://www.gnu.org/licenses/>.
*
*/
package org.bigbluebutton.voiceconf.sip;
import org.zoolu.net.*;
import org.zoolu.sip.provider.SipProvider;
import org.zoolu.sip.message.Message;
/** KeepAliveSip thread, for keeping the connection up toward a target SIP node
* (e.g. toward the seriving proxy/gw or a remote UA).
* It periodically sends keep-alive tokens in order to refresh TCP connection timeouts
* and/or NAT TCP/UDP session timeouts.
*/
public class KeepAliveSip extends KeepAliveUdp
{
/** SipProvider */
SipProvider sip_provider;
/** Sip message */
Message message=null;
/** Creates a new SIP KeepAliveSip daemon */
public KeepAliveSip(SipProvider sip_provider, SocketAddress target, long delta_time)
{ super(target,delta_time);
init(sip_provider,null);
start();
}
/** Creates a new SIP KeepAliveSip daemon */
public KeepAliveSip(SipProvider sip_provider, SocketAddress target, Message message, long delta_time)
{ super(target,delta_time);
init(sip_provider,message);
start();
}
/** Inits the KeepAliveSip in SIP mode */
private void init(SipProvider sip_provider, Message message)
{ this.sip_provider=sip_provider;
if (message==null)
{ message=new Message("\r\n");
}
//if (target!=null)
//{ message.setRemoteAddress(target.getAddress().toString());
// message.setRemotePort(target.getPort());
//}
this.message=message;
}
/** Sends the kepp-alive packet now. */
public void sendToken() throws java.io.IOException
{ // do send?
if (!stop && target!=null && sip_provider!=null)
{ sip_provider.sendMessage(message,sip_provider.getDefaultTransport(),target.getAddress().toString(),target.getPort(),127);
}
}
/** Main thread. */
public void run()
{ super.run();
sip_provider=null;
}
/** Gets a String representation of the Object */
public String toString()
{ String str=null;
if (sip_provider!=null)
{ str="sip:"+sip_provider.getViaAddress()+":"+sip_provider.getPort()+"-->"+target.toString();
}
return str+" ("+delta_time+"ms)";
}
}