[streaming] Listing Multicast clients !

[Romuald CARI]

Hi everybody ! I'm currently trying to do some statistics about the 
streams that my server multicasts over my network.
The most important thing for me is to count how many people are in a 
precise multicast group, watching the video stream that is sent to them.
Is there a way, already implemented in IP protocol to ping the clients 
of a group ?
I would like to get the same result as when you ping the multicast 
enabled boxes of a network using "ping 224.0.0.1" and get many responses.

If this does not exist, is VLC able to answer to some special datagrams 
sent in the multicast group that it is currently listening to ?

Thanks for any suggestions :)

Romuald


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