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Re: [MMUSIC] [rtcweb] Tunnelling DTLS in SDP

Christer Holmberg <christer.holmberg@ericsson.com> Mon, 04 April 2016 18:02 UTC

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From: Christer Holmberg <christer.holmberg@ericsson.com>
To: Eric Rescorla <ekr@rtfm.com>, mmusic WG <mmusic@ietf.org>, "rtcweb@ietf.org" <rtcweb@ietf.org>
Thread-Topic: [rtcweb] Tunnelling DTLS in SDP
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Date: Mon, 04 Apr 2016 18:02:32 +0000
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Subject: Re: [MMUSIC] [rtcweb] Tunnelling DTLS in SDP
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Hi,

Regarding forking, you cannot assume that forking entities will remove the SDP attribute. Unless they support the attribute, they will most likely just forward it. The offerer will find out if forking has occurred, but he answerer(s) will not know.

Regards,

Christer

From: rtcweb [mailto:rtcweb-bounces@ietf.org] On Behalf Of Eric Rescorla
Sent: 04 April 2016 16:11
To: mmusic WG <mmusic@ietf.org>; rtcweb@ietf.org
Subject: [rtcweb] Tunnelling DTLS in SDP

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

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