Re: [MMUSIC] [Technical Errata Reported] RFC4566 (3278)

"Miguel A. Garcia" <Miguel.A.Garcia@ericsson.com> Wed, 04 July 2012 09:12 UTC

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Date: Wed, 04 Jul 2012 11:12:40 +0200
From: "Miguel A. Garcia" <Miguel.A.Garcia@ericsson.com>
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To: RFC Errata System <rfc-editor@rfc-editor.org>, "\"Ali C. Begen (abegen)\" " <abegen@cisco.com>
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Cc: "mmusic@ietf.org" <mmusic@ietf.org>, Gonzalo Camarillo <gonzalo.camarillo@ericsson.com>, "fandreas@cisco.com" <fandreas@cisco.com>, "M.Handley@cs.ucl.ac.uk" <M.Handley@cs.ucl.ac.uk>, "csp@csperkins.org" <csp@csperkins.org>, "van@packetdesign.com" <van@packetdesign.com>
Subject: Re: [MMUSIC] [Technical Errata Reported] RFC4566 (3278)
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I am adding Ali Begen to the loop, who is the current editor of 4566bis.

Ali, can you please comment on the technical errata?

/Miguel



On 03/07/2012 20:01, RFC Errata System wrote:
>
> The following errata report has been submitted for RFC4566,
> "SDP: Session Description Protocol".
>
> --------------------------------------
> You may review the report below and at:
> http://www.rfc-editor.org/errata_search.php?rfc=4566&eid=3278
>
> --------------------------------------
> Type: Technical
> Reported by: Riccardo Bernardini <riccardo.bernardini@uniud.it>
>
> Section: 5
>
> Original Text
> -------------
> At page 9:
>
>
>
>
>
>        Media description, if present
>
>           m=  (media name and transport address)
>
> Corrected Text
> --------------
>
>
>        Media description, if present
>
>           m=* (media name and transport address)
>
>
>
>
>
> Notes
> -----
> A '*' is added making "m=" lines optional
>
>
>
> Rationale:
>
> The description about media lines in section 5, page 9 is conflicting with the ABNF syntax of media-description in Section 9, page 40
>
>
>
> media-descriptions =  *( media-field
>
>                           information-field
>
>                           *connection-field
>
>                           bandwidth-fields
>
>                           key-field
>
>                           attribute-fields )
>
>
>
> According to the ABNF grammar, an SDP description can have zero "m=" lines, but according to the description at page 9, at least one line must be present.  Note that the conflict could be solved also by replacing the media-descriptions definition with
>
>
>
>     media-descriptions =  1*( media-field ... )
>
>
>
> but at page 8 (still Section 5) it is said
>
>
>
>     An SDP session description consists of a session-level section
>
>     followed by zero or more media-level sections. ...
>
>                 ^^^^^^^^^^^^^^^^^^^^^^^^
>
>
>
> so, I guess that the ABNF grammar is correct.
>
> Instructions:
> -------------
> This errata is currently posted as "Reported". If necessary, please
> use "Reply All" to discuss whether it should be verified or
> rejected. When a decision is reached, the verifying party (IESG)
> can log in to change the status and edit the report, if necessary.
>
> --------------------------------------
> RFC4566 (draft-ietf-mmusic-sdp-new-26)
> --------------------------------------
> Title               : SDP: Session Description Protocol
> Publication Date    : July 2006
> Author(s)           : M. Handley, V. Jacobson, C. Perkins
> Category            : PROPOSED STANDARD
> Source              : Multiparty Multimedia Session Control
> Area                : Real-time Applications and Infrastructure
> Stream              : IETF
> Verifying Party     : IESG
>

-- 
Miguel A. Garcia
+34-91-339-3608
Ericsson Spain