Re: [rtcweb] Tunnelling DTLS in SDP
Harald Alvestrand <harald@alvestrand.no> Tue, 05 April 2016 09:54 UTC
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From: Harald Alvestrand <harald@alvestrand.no>
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Date: Tue, 05 Apr 2016 11:53:57 +0200
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Subject: Re: [rtcweb] Tunnelling DTLS in SDP
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On first read, this makes sense to me. I wonder if it could/should be made into a general concept, to fit with the tendency in WebRTC:NG to separate signalling format even more from operation? We could call it "out of band DTLS setup", say that in general, a DTLS session can be started in one medium (SDP signalling, in this case), and continued in another medium (the DTLS-protected media channel), and have a section describing the details of carrying DTLS-over-SDP. When viewing it in this way, using the same technique with Jabber or proprietary signalling becomes a reasonably obvious exercise. There are some other twists that seem obvious too - for instance, one could continue the setup over the SDP channel in subsequent offer/answers if the first exchange failed to set up a media channel. I'm not sure that makes sense, though. One SDP twist: If forking happens, it could be treated like any other attempt to generate multiple answers to a ClientHello, I think. I'm sure it's well defined how to respond to that - it's an obvious attack. Only one leg of the fork would ever succeed, I assume. On 04/04/2016 03:10 PM, Eric Rescorla wrote: > Hi folks, > > I wanted to call your attention to a draft I just published with a > possibly stupid > idea. > > https://tools.ietf.org/html/draft-rescorla-dtls-in-sdp-00 > > A nontrivial fraction of call setup time in WebRTC is the DTLS handshake. > This document describes how to piggyback the first few handshake messages > in the SDP offer/answer exchange, thus reducing latency. > > Comments welcome. > > -Ekr > > > > > > _______________________________________________ > rtcweb mailing list > rtcweb@ietf.org > https://www.ietf.org/mailman/listinfo/rtcweb -- Surveillance is pervasive. Go Dark.
- Re: [rtcweb] [MMUSIC] Tunnelling DTLS in SDP Christer Holmberg
- Re: [rtcweb] [MMUSIC] Tunnelling DTLS in SDP T H Panton
- Re: [rtcweb] [MMUSIC] Tunnelling DTLS in SDP Roman Shpount
- Re: [rtcweb] Tunnelling DTLS in SDP Cullen Jennings
- [rtcweb] Tunnelling DTLS in SDP Eric Rescorla
- Re: [rtcweb] Tunnelling DTLS in SDP pfh
- Re: [rtcweb] Tunnelling DTLS in SDP Roman Shpount
- Re: [rtcweb] Tunnelling DTLS in SDP pfh
- Re: [rtcweb] Tunnelling DTLS in SDP Roman Shpount
- Re: [rtcweb] Tunnelling DTLS in SDP Martin Thomson
- Re: [rtcweb] Tunnelling DTLS in SDP Martin Thomson
- Re: [rtcweb] Tunnelling DTLS in SDP Christer Holmberg
- Re: [rtcweb] Tunnelling DTLS in SDP Harald Alvestrand
- Re: [rtcweb] Tunnelling DTLS in SDP Justin Uberti
- Re: [rtcweb] [MMUSIC] Tunnelling DTLS in SDP Matthew Kaufman
- Re: [rtcweb] Tunnelling DTLS in SDP Tim Panton
- Re: [rtcweb] Tunnelling DTLS in SDP Harald Alvestrand
- Re: [rtcweb] Tunnelling DTLS in SDP Tim Panton
- Re: [rtcweb] Tunnelling DTLS in SDP Tim Panton
- Re: [rtcweb] Tunnelling DTLS in SDP Harald Alvestrand
- Re: [rtcweb] Tunnelling DTLS in SDP Roman Shpount
- Re: [rtcweb] Tunnelling DTLS in SDP Eric Rescorla
- Re: [rtcweb] Tunnelling DTLS in SDP Drage, Keith (Nokia - GB)
- Re: [rtcweb] [MMUSIC] Tunnelling DTLS in SDP Peter Thatcher
- Re: [rtcweb] Tunnelling DTLS in SDP Peter Thatcher
- Re: [rtcweb] Tunnelling DTLS in SDP Roman Shpount
- Re: [rtcweb] [MMUSIC] Tunnelling DTLS in SDP Eric Rescorla
- Re: [rtcweb] [MMUSIC] Tunnelling DTLS in SDP IƱaki Baz Castillo