[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [MEDIACTRL] Control Framework SDP Review - Issue 1
Seems a reasonable change to me.
Scott
-----Original Message-----
From: mediactrl-bounces at ietf.org [mailto:mediactrl-bounces at ietf.org] On Behalf Of Chris Boulton
Sent: Friday, October 02, 2009 12:53
To: mediactrl at 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 at ietf.org
https://www.ietf.org/mailman/listinfo/mediactrl
Supplemental Web Site:
http://www.standardstrack.com/ietf/mediactrl