[pjsip] SRTP feature requests

Klaus Darilion klaus.mailinglists at pernau.at
Thu Feb 14 10:09:03 EST 2008


Hi!

I did some SRTP tests and it mostly works, but:

1. It does not work if pjsip sends SAVP and 200 OK contains AVP - then 
pjsip has an open call but does not send RTP. The logs say:

  16:02:54.437   pjsua_call.c SDP negotiation has failed: SDP media 
transport type mismatch in offer/answer (PJMEDIA_SDPNEG_EINVANSTP) 
[status=220046]

What should happen now? Should pjsua-lib hang up the call? It does not 
and the call changes to "confirmed".

If the application should send the BYE, then there should be some 
indication, e.g.     PJSUA_CALL_MEDIA_SAVP_FAILED in the 
call_media_state callback. Or is there already a callback which tell the 
application about the SRTP failure?

2. If SRTP is optional and a call is established, it would be good to 
retrieve SRTP status from pjsua (e.g. pjsua_call_get_info()) to indicate 
SRTP status to the user.

thanks
Klaus




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