Re: I-D Action: draft-ietf-mmusic-opportunistic-negotiation-01.txt

Hi,

In the mail you referenced the following is said:

“I see your point but Currently SIPBRANDY is chartered to produce Opportunistic SRTP as a BCP. There is also a milestone to
inform MMUSIC or other appropriate WGs of any changes needed to support Opportunistic SRTP (Not expected to be published
as an RFC).  I think SIPBRANDY is just carrying out what they are chartered to do.”

But, draft-ietf-mmusic-opportunistic-negotiation doesn’t really define any procedures – it references the SIPBRANDY draft for everything.

“[I-D.ietf-sipbrandy-osrtp] describes how Secure Real-time transport
              protocol (SRTP) can be negotiated opportunistically.”

But, as the SIPBRANDY is only Informational, where are the normative procedures?

“The exact negotiation mechanism is however outside the scope of this document,
              an example mechanism can be found in [I-D.ietf-sipbrandy-osrtp].”

How can negotiation be outside the scope of the document, when the title of the document contains “negotiating”?

In addition, the text says that the sipbrandy only contains “an example mechanism”.

If we are going to have this document, I think we shall include normative offer/answer procedures. The draft DOES contain some normative procedures, but I think we shall have it all in one place. One shall not have to read both documents just to figure out the offer/answer procedures.

Regards,

Christer






From: Gonzalo Salgueiro (gsalguei) [mailto:[email protected]]
Sent: 27 September 2017 21:58
To: Christer Holmberg <[email protected]>
Cc: [email protected]
Subject: Re: [MMUSIC] I-D Action: draft-ietf-mmusic-opportunistic-negotiation-01.txt

Hi Christer -

See this: https://mailarchive.ietf.org/arch/msg/mmusic/wov2yErrgtUZURyRyVuVZ6K-nLI

Cheers,

-G


On Sep 27, 2017, at 9:19 AM, Christer Holmberg <[email protected]<mailto:[email protected]>> wrote:

Hi,

I am currently reviewing draft-ietf-sipbrandy-osrtp-03, and the following
question comes to my mind: do we really need
draft-ietf-mmusic-opportunistic-negotiation? :)

Section 3 of draft-ietf-sipbrandy-osrtp-03 already more or less contains
SDP Offer/Answer procedures for OSRTP. We can change the name of section 3
in that draft to ³SDP Offer/Answer Procedures², modify the structure a
little, and add whatever might be missing.

Or, am I missing something?

Regards,

Christer





On 14/09/17 19:03, "mmusic on behalf of [email protected]<mailto:[email protected]>"
<[email protected]<mailto:[email protected]> on behalf of [email protected]<mailto:[email protected]>> wrote:



A New Internet-Draft is available from the on-line Internet-Drafts
directories.
This draft is a work item of the Multiparty Multimedia Session Control WG
of the IETF.

      Title           : Negotiating SRTP and RTCP Feedback using the
RTP/AVP Profile
      Authors         : Andrew Hutton
                        Roland Jesske
                        Alan Johnston
                        Gonzalo Salgueiro
                        Bernard Aboba
Filename        : draft-ietf-mmusic-opportunistic-negotiation-01.txt
Pages           : 7
Date            : 2017-09-14

Abstract:
 This document describes how the use of the Secure Real-time transport
 protocol (SRTP) [RFC3711]. can be negotiated using the RTP/AVP (Audio
 Video Profile) defined in [RFC3551].  Such a mechanism is used to
 provide a means for encrypted media to be used in environments where
 support for encryption is not known in advance, and not required.
 The same mechanism is also applied to negotiation of the Extended RTP
 Profile for Real-time Transport Control Protocol Based Feedback (RTP/
 AVPF) [RFC4585].


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-mmusic-opportunistic-negotiati
on/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-mmusic-opportunistic-negotiation-01
https://datatracker.ietf.org/doc/html/draft-ietf-mmusic-opportunistic-nego
tiation-01

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-mmusic-opportunistic-negotiat
ion-01


Please note that it may take a couple of minutes from the time of
submission
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/

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