[rtcweb] Unsolicited DTLS Handshake

Roman Shpount <roman@telurix.com> Mon, 01 December 2014 22:43 UTC

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Date: Mon, 1 Dec 2014 17:42:57 -0500
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From: Roman Shpount <roman@telurix.com>
To: "rtcweb@ietf.org" <rtcweb@ietf.org>
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Subject: [rtcweb] Unsolicited DTLS Handshake
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Should browsers support new DTLS handshake without it being triggered by
offer/answer?

I think new DTLS handshake can be triggered at any time by ClientHello or
HelloRequest DTLS message. At this point, unless I am missing something, it
looks like neither Chrome no Firefox update SRTP keys unless transport
parameters or fingerprint is changed due to offer/answer. On the other
hand, DTLS end-point can initiate a handshake at any time, for instance to
do the DTLS-SRTP rekey. Is this a missing feature or is this some new
behavior that needs to be defined?

Regards.
_____________
Roman Shpount