[Live-devel] RTSPClientSessions lifetime

[Ross Finlayson]

> On Server side, RTSPClientSessions are created on SETUP when request does not specify a Session ID. 
> It seems that there is no direct relation between a Connection and a Session. Is it because many Connections can share the same Session ?

Yes.


> In this case I wonder when Sessions are closed and destroyed : is it when all Connections sharing a Session are closed ?

No, because another connection - for the same session - could be created next.


> Or is there a timeout somewhere ?

Yes.  Note the following comment (in "liveMedia/include/RTSPServer.hh", lines 69-72:

      // If "reclamationTestSeconds" > 0, then the "RTSPClientSession" state for
      //     each client will get reclaimed (and the corresponding RTP stream(s)
      //     torn down) if no RTSP commands - or RTCP "RR" packets - from the
      //     client are received in at least "reclamationTestSeconds" seconds.

Note that standards-compliant RTSP/RTP clients are required to implement RTCP - thereby sending frequent RTCP "RR" packets to indicate client liveness.  (If the clients are implemented using our software, then they will get this automatically.)

Ross Finlayson
Live Networks, Inc.
http://www.live555.com/

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