Re: [MEDIACTRL] Control Framework SDP Review - Issue 1
"Jonathan Lennox" <jonathan@vidyo.com> Fri, 02 October 2009 15:00 UTC
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Date: Fri, 02 Oct 2009 11:01:34 -0400
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Thread-Topic: [MEDIACTRL] Control Framework SDP Review - Issue 1
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From: Jonathan Lennox <jonathan@vidyo.com>
To: Chris Boulton <chris@ns-technologies.com>, mediactrl@ietf.org
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Subject: Re: [MEDIACTRL] Control Framework SDP Review - Issue 1
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Just to re-iterate one point in my original e-mail, though -- this would mean that you'd either have to normatively depend on the SCTP-comedia draft (which is still an individual submission), or drop SCTP support from this draft. -- Jonathan Lennox Vidyo, Inc jonathan@vidyo.com > -----Original Message----- > From: mediactrl-bounces@ietf.org [mailto:mediactrl-bounces@ietf.org] On > Behalf Of Chris Boulton > Sent: Friday, October 02, 2009 6:53 AM > To: mediactrl@ietf.org > Subject: [MEDIACTRL] Control Framework SDP Review - Issue 1 > > Jonathan Lennox has kindly provided expert SDP review for the Media > Control Channel Framework document. This is the first in a series of > emails intended to address the points raised. At this final stage your > input is extremely important. > > > My first comment is on the use of the values "TCP/CFW", "TCP/TLS/CFW", > "SCTP/CFW" and "SCTP/TLS/CFW" for the SDP <proto> field, with a "fmt" > field of "*". A more usual use of the proto field would be to use the > existing proto fields "TCP", "TCP/TLS", "SCTP", or "SCTP/DTLS", and > then > (after defining "application/cfw" as a media type) use "cfw" as the > <fmt> field. > > Thus, instead of having > > m=application 7575 TCP/CFW * > > you'd have > > m=application 7575 TCP cfw > > This has the advantage of leveraging other existing work in SDP, e.g. > you would get ICE-TCP "for free" once it's finished. > > > To be sure, there would be some disadvantages of this. > > Notably, "SCTP" and "SCTP/DTLS" are still only defined in an individual > I-D, and there's been only limited attention paid to it in the MMUSIC > community. On the other hand, if Mediactrl has the expertise to > understand how SCTP should work in a comedia context, it'd probably be > better to let this be available to everything that would want to use > it, > rather than just CFW. > > [Chris] I agreed that the proposed change is more elegant and if it > means that we get ICE-TCP for free then its a bonus. It is the > recommendation of the authors that this change is made to the draft. > Any comments or objections? > > -- > Chris Boulton > CTO & Co-founder > NS-Technologies <http://www.ns-technologies.com> > m: +44.7876.476681 > _______________________________________________ > MEDIACTRL mailing list > MEDIACTRL@ietf.org > https://www.ietf.org/mailman/listinfo/mediactrl > Supplemental Web Site: > http://www.standardstrack.com/ietf/mediactrl
- [MEDIACTRL] Control Framework SDP Review - Issue 1 Chris Boulton
- Re: [MEDIACTRL] Control Framework SDP Review - Is… McGlashan, Scott
- Re: [MEDIACTRL] Control Framework SDP Review - Is… Lorenzo Miniero
- Re: [MEDIACTRL] Control Framework SDP Review - Is… Jonathan Lennox
- Re: [MEDIACTRL] Control Framework SDP Review - Is… Chris Boulton
- Re: [MEDIACTRL] Control Framework SDP Review - Is… Chris Boulton