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[MMUSIC] draft-dtls-sdp: Allow offerer to establish DTLS association before it has received the SDP answer?

Christer Holmberg <christer.holmberg@ericsson.com> Tue, 16 May 2017 06:47 UTC

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From: Christer Holmberg <christer.holmberg@ericsson.com>
To: "mmusic@ietf.org" <mmusic@ietf.org>
Thread-Topic: draft-dtls-sdp: Allow offerer to establish DTLS association before it has received the SDP answer?
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Date: Tue, 16 May 2017 06:43:24 +0000
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Subject: [MMUSIC] draft-dtls-sdp: Allow offerer to establish DTLS association before it has received the SDP answer?
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Hi,

The pull request based on the WGLC comments from Roman S and Martin T,
suggests text saying that if an offerer receives ClientHello it must not
send ServerHello until it has received the answer (that carries the
fingerprint associated with the DTLS association).

It has been claimed that we DO need to allow the offerer to establish the
DTLS association BEFORE it has received the answer, in order to support
certain early media use-cases. Until the offerer has received the answer,
such media would be considered un-authenticated. Others do not want to allow
it, due to security concerns.

We need to find a solution to this, so any input is welcome.

The pull request: https://github.com/cdh4u/draft-dtls-sdp/pull/31/files

Regards,

Christer

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