Re: [AVTCORE] [Technical Errata Reported] RFC4585 (3313)
Magnus Westerlund <magnus.westerlund@ericsson.com> Sun, 04 November 2012 18:36 UTC
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Date: Sun, 04 Nov 2012 13:36:08 -0500
From: Magnus Westerlund <magnus.westerlund@ericsson.com>
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Subject: Re: [AVTCORE] [Technical Errata Reported] RFC4585 (3313)
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WG, I have reviewed this errata and it appears correct. I would recommend that it is approved. Additional views on this? Please provide any feedback within a week, after that I will instruct the ADs to approve this errata. Cheers Magnus On 2012-08-11 16:57, RFC Errata System wrote: > > The following errata report has been submitted for RFC4585, > "Extended RTP Profile for Real-time Transport Control Protocol (RTCP)-Based Feedback (RTP/AVPF)". > > -------------------------------------- > You may review the report below and at: > http://www.rfc-editor.org/errata_search.php?rfc=4585&eid=3313 > > -------------------------------------- > Type: Technical > Reported by: Mo Zanaty <mzanaty@cisco.com> > > Section: 4.2 > > Original Text > ------------- > rtcp-fb-ack-param = SP "rpsi" > / SP "app" [SP byte-string] > / SP token [SP byte-string] > / ; empty > > > Corrected Text > -------------- > rtcp-fb-ack-param = SP "rpsi" > / SP "app" [SP byte-string] > / SP token [SP byte-string] > > > Notes > ----- > RFC 4585 defines and allows generic NACK (with no further parameters) but not generic ACK (which always requires further parameters). Section 4.2 says: > ... > Parameters MUST be provided to further distinguish different types > of positive acknowledgement feedback. > ... > The feedback type "nack", without parameters, indicates use of the > Generic NACK feedback format as defined in Section 6.2.1. > ... > The ABNF incorrectly allows nothing after "ack", implying that generic ACK is valid. Even the approved errata, which replaces the invalid empty alternate with optional [], still allows nothing after "ack". Note that recent interest in RTP congestion control (e.g. RMCAT BOF) may lead to defining a standard ACK. > > 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. > > -------------------------------------- > RFC4585 (draft-ietf-avt-rtcp-feedback-11) > -------------------------------------- > Title : Extended RTP Profile for Real-time Transport Control Protocol (RTCP)-Based Feedback (RTP/AVPF) > Publication Date : July 2006 > Author(s) : J. Ott, S. Wenger, N. Sato, C. Burmeister, J. Rey > Category : PROPOSED STANDARD > Source : Audio/Video Transport > Area : Real-time Applications and Infrastructure > Stream : IETF > Verifying Party : IESG > _______________________________________________ > Audio/Video Transport Core Maintenance > avt@ietf.org > https://www.ietf.org/mailman/listinfo/avt > -- Magnus Westerlund ---------------------------------------------------------------------- Multimedia Technologies, Ericsson Research EAB/TVM ---------------------------------------------------------------------- Ericsson AB | Phone +46 10 7148287 Färögatan 6 | Mobile +46 73 0949079 SE-164 80 Stockholm, Sweden| mailto: magnus.westerlund@ericsson.com ----------------------------------------------------------------------
- [AVTCORE] [Technical Errata Reported] RFC4585 (33… RFC Errata System
- Re: [AVTCORE] [Technical Errata Reported] RFC4585… Magnus Westerlund
- Re: [AVTCORE] [Technical Errata Reported] RFC4585… Alan Clark