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Re: [rtcweb] Text proposal for CNAME in draft-ietf-rtcweb-rtp-usage

Magnus Westerlund <magnus.westerlund@ericsson.com> Thu, 17 April 2014 10:50 UTC

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Date: Thu, 17 Apr 2014 12:50:15 +0200
From: Magnus Westerlund <magnus.westerlund@ericsson.com>
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To: Martin Thomson <martin.thomson@gmail.com>
References: <533E76AC.7030003@ericsson.com> <CABkgnnVD09V80OkXY=ZKicYhjBMR8XZMFYCXrMmHMkVWE7mwVw@mail.gmail.com> <005B30AC-F891-481E-A25A-D3705713F1D3@csperkins.org> <CABkgnnUSpeL8fv=7gRmM+QSYvFgd16r_2cP6J066DL+dkydrCg@mail.gmail.com> <534284B7.7010103@ericsson.com> <534D21C2.20300@ericsson.com> <CABkgnnWC9SCFbRqvnEkciqfHtwv6j48cLP0JeE4DfhH6cqToSw@mail.gmail.com> <534E7D83.3010608@ericsson.com> <CABkgnnVhS8SQKWe69pm+a8o-cqMb5aPy5DKDQv=iVaRLaQtaqA@mail.gmail.com>
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Cc: "rtcweb@ietf.org" <rtcweb@ietf.org>, Colin Perkins <csp@csperkins.org>
Subject: Re: [rtcweb] Text proposal for CNAME in draft-ietf-rtcweb-rtp-usage
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On 2014-04-17 01:27, Martin Thomson wrote:
> On 16 April 2014 05:54, Magnus Westerlund
> <magnus.westerlund@ericsson.com> wrote:
>> Is this better/acceptable?
> 
> Better, but I don't think that the proposed solution is sufficient for
> some use cases.  There is no downside to enabling correlation of
> sessions when the signaling entity is able to force correlation.  Let
> the app set CNAME.
> 

Sure from privacy point of view, but there are a potential to really
screw up RTP/RTCP by setting the same CNAME in multiple endpoints part
of the same communication session. That is why I wrote like I wrote.
Even using the same CNAME between different instances of the media
framework, which I assume is the likely result of establishing
PeerConnection in different tabs/windows in a browser instance could get
into issues using the same CNAME, due to them really not being based on
a common context.

Cheers

Magnus Westerlund

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