Re: [MMUSIC] DTLS-SRTP client/server role negotiation

Paul Kyzivat <pkyzivat@alum.mit.edu> Wed, 01 May 2013 20:58 UTC

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Date: Wed, 01 May 2013 16:56:59 -0400
From: Paul Kyzivat <pkyzivat@alum.mit.edu>
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Subject: Re: [MMUSIC] DTLS-SRTP client/server role negotiation
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On 5/1/13 2:26 PM, Gustavo García wrote:
> RFC5764 (DTLS-SRTP) states that "Which side is the DTLS client and which side is the DTLS server must be established via some out-of-band mechanism such as SDP."
>
> What is the specification on how to signal that in SDP?
>
> Specifically in case of 3pcc where both endpoints are SDP offerers which one should take the client and server roles for DTLS?    Should we tie that role to ICE controlled/controlling roles or should we negotiate it in the SDP somehow?

See RFC4145.