How to catch/use Remote/LocalCollisionEvent

Question

Hello everyone,
I am trying to detect when a user is already comunicating (busy) with another one. I unsuccessfully tried inserting event handlers both in my transmitting and receiving classes as follows:
public class ReceiveClass
implements ReceiveStreamListener, SessionListener,
ControllerListener
public boolean initialize ()
try
mgr = RTPManager.newInstance ();
mgr.addSessionListener ( this );
mgr.addReceiveStreamListener ( this );
public synchronized void update ( SessionEvent evt )
if ( evt instanceof NewParticipantEvent )
Participant p = ( ( NewParticipantEvent ) evt ).getParticipant ();
System.err.println ( " - A new participant has just joined: " +
p.getCNAME () );
/* un usuario se ha conectado*/
/* se cambia el icono y se deja habilitado*/
else if ( evt instanceof LocalCollisionEvent )
long ssrc = ( ( LocalCollisionEvent ) evt ).getNewSSRC();
System.err.println ( " - Local Collision Event: " + ssrc );
/* un usuario ya esta conectado con otro usuario */
public synchronized void update ( RemoteEvent evt )
if ( evt instanceof RemoteCollisionEvent )
long ssrc = ( ( RemoteCollisionEvent ) evt ).getSSRC ();
System.err.println ( " - Remote Collision Event: " + ssrc );
/* un usuario ya esta conectado con otro usuario */
public class TransmitingClass
implements SessionListener, RemoteListener
public synchronized void update ( SessionEvent evt )
if ( evt instanceof NewParticipantEvent )
Participant p = ( ( NewParticipantEvent ) evt ).getParticipant ();
System.err.println ( " - A new participant has just joined: " +
p.getCNAME () );
/* un usuario se ha conectado*/
/* se cambia el icono y se deja habilitado*/
else if ( evt instanceof LocalCollisionEvent )
long ssrc = ( ( LocalCollisionEvent ) evt ).getNewSSRC ();
System.err.println ( " - LocalCollisionEvent: " +
ssrc );
/* un usuario ya esta conectado con otro usuario */
public synchronized void update ( RemoteEvent evt )
if ( evt instanceof RemoteCollisionEvent )
long ssrc = ( ( RemoteCollisionEvent ) evt ).getSSRC ();
System.err.println ( " - RemoteCollisionEvent: " +
ssrc );
/* un usuario ya esta conectado con otro usuario */
could anyone give me some hints regarding this issue? What would I be doing wrong or what would I be missing?? In the above code piece I am able to catch the NewParticipantEvent but the other ones...
Thank you very in advance,
Olivier

Answer 1

Hi,
Its simple and complex at the same time. First you need to have DNS resolution for IPv6 addresses (Records AAAA) in internal DNS. For This, have a look at this blog post :
http://danstoncloud.com/blogs/simplebydesign/archive/2013/01/12/dns64-behavior-change-in-windows-server-2012.aspx
Once you have name resolution you should be able to ping (if not, NAT-Transversal or protocol is not enabled in the firewall). Next move is to enable incoming network flow for remote assistance and enable NAT-Transversal. At this stage, Remote assistance
should work but network flow between directaccess clients will not be protected by IPSEC tunnels of DirectAccess. We will need to build our own IPSEC transport rules for that.
Thats a subject I'm trying to finalize in a blog post, but i'm short in time these days.
BenoitS - Simple by Design http://danstoncloud.com/blogs/simplebydesign/default.aspx