Re: [rohc] [Technical Errata Reported] RFC5225 (2703)

[Kristofer Sandlund <[e-mail]>]

Ongoing discussion? I'm no longer subscribed to the rohc list (and I'm quite sure my co-author doesn't read it either), so I don't know of anything that has been discussed there.

But I have previously discussed the below issue with Calle and I agree with his suggested update.

/Kristofer

at den 3 februari 2011 13:52, Lars Eggert wrote :
> Based on the ongoing discussion, I assume the community
> consensus is to approve this?
> 
> On 2011-2-3, at 14:22, RFC Errata System wrote:
> 
> > 
> > The following errata report has been submitted for
> > RFC5225, "RObust Header Compression Version 2 (ROHCv2):
> > Profiles for 
> RTP, UDP, IP, ESP and UDP-Lite".
> > 
> > --------------------------------------
> > You may review the report below and at:
> > http://www.rfc-editor.org/errata_search.php?rfc=5225&eid=2703
> > 
> > --------------------------------------
> > Type: Technical
> > Reported by: Carl Knutsson <[e-mail]>
> > 
> > Section: 6.6.11
> > 
> > Original Text
> > -------------
> > o  ip_id_behavior, one octet for each IP header in the
> > compressible 
> > 
> >   header chain starting from the outermost header. 
> > Each octet 
> > 
> >   consists of 2 bits padded with 6 MSBs of zeroes.
> > 
> > Corrected Text
> > --------------
> > o  ip_id_behavior_outer, one octet for each IPv4 header
> > except the 
> > 
> >   innermost in the compressible header chain starting
> > from 
> the outermost
> > 
> >   header. Each octet consists of 2 bits padded with 6
> > MSBs 
> of zeroes.
> > 
> > 
> > 
> > o  ip_id_behavior_innermost, one octet if the innermost
> header is an
> > 
> >   IPv4 header. The octet consists of 2 bits padded with
> > 6 
> MSBs of zeroes.
> > 
> > Notes
> > -----
> > There is no control field called ip_ip_behavior in the
> document. There are two control fields related to IP-ID
> behavior, ip_id_behavior_innermost and
> ip_id_behavior_outer. For IPv6, only the
> ip_id_behavior_innermost field exists and its value is
> always IP_ID_BEHAVIOR_RANDOM according to the FN. This
> makes it impossible to include ip_id_behavior_outer when
> calculating the crc for IPv6 headers. Furthermore, since
> the ip_id_behavior_innermost is constant it makes no
> sense to include it in the crc calculation. 
> > 
> > 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. 
> > 
> > --------------------------------------
> > RFC5225 (draft-ietf-rohc-rfc3095bis-rohcv2-profiles-06)
> > --------------------------------------
> > Title               : RObust Header Compression Version
> > 2 
> (ROHCv2): Profiles for RTP, UDP, IP, ESP and UDP-Lite
> > Publication Date    : April 2008
> > Author(s)           : G. Pelletier, K. Sandlund
> > Category            : PROPOSED STANDARD
> > Source              : Robust Header Compression
> > Area                : Transport
> > Stream              : IETF
> > Verifying Party     : IESG