Re: [rtcweb] PRANSWER is unusable for serial forking
Iñaki Baz Castillo <ibc@aliax.net> Tue, 09 October 2012 09:25 UTC
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From: Iñaki Baz Castillo <ibc@aliax.net>
Date: Tue, 09 Oct 2012 11:24:38 +0200
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To: Roman Shpount <roman@telurix.com>
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Cc: rtcweb@ietf.org
Subject: Re: [rtcweb] PRANSWER is unusable for serial forking
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2012/10/9 Roman Shpount <roman@telurix.com>: > SIP does not have serial forking. SIp has serial forking but just at signaling level, not at media level :) > Offer/Answer does not describe something > like this. +1 > We either need to define it and make it something that describes > some set of existing scenarios or add support for something that is defined. IMHO the solution is described in other mail thread (maybe in rtcweb WG): implement cloning. Example: - My JS SIP app sends an INVITE with SDP and receives a 183 response with To-tag "AAAA" and SDP A, so I already have a media stream. - Later the voicemail system answers the call so replies a 200 with To-tag "BBBB" and SDP B. Since To-tag is different I do know (as per RFC 3261/3264) that I should create another media "session" sharing my local SDP (but cloning it). And I also want to close the previous one. Of course, for this we need some API method like "cloneLocalDescription(new_remote_sdp_object)" or whatever. AFAIR this has been recently discussed in rtcweb WG. -- Iñaki Baz Castillo <ibc@aliax.net>
- [rtcweb] PRANSWER is unusable for serial forking Roman Shpount
- Re: [rtcweb] PRANSWER is unusable for serial fork… Christer Holmberg
- Re: [rtcweb] PRANSWER is unusable for serial fork… Iñaki Baz Castillo
- Re: [rtcweb] PRANSWER is unusable for serial fork… Cullen Jennings (fluffy)
- Re: [rtcweb] PRANSWER is unusable for serial fork… Christer Holmberg
- Re: [rtcweb] PRANSWER is unusable for serial fork… Christer Holmberg
- Re: [rtcweb] PRANSWER is unusable for serial fork… Cullen Jennings (fluffy)