Re: [tcpm] Erik Kline's Yes on draft-ietf-tcpm-rfc793bis-25: (with COMMENT)

"touch@strayalpha.com" <touch@strayalpha.com> Thu, 30 September 2021 20:56 UTC

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From: "touch@strayalpha.com" <touch@strayalpha.com>
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Date: Thu, 30 Sep 2021 13:56:27 -0700
Cc: Benjamin Kaduk <kaduk@mit.edu>, draft-ietf-tcpm-rfc793bis@ietf.org, tcpm <tcpm@ietf.org>, The IESG <iesg@ietf.org>, tcpm-chairs@ietf.org
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To: Erik Kline <ek.ietf@gmail.com>
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Subject: Re: [tcpm] Erik Kline's Yes on draft-ietf-tcpm-rfc793bis-25: (with COMMENT)
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PS - should we also note what should happen with that data, i.e., until it is defined in some other way?

I.e., SHOULD allow RST to include data, but this data is NOT part of the TCP byte stream.
—
Joe Touch, temporal epistemologist
www.strayalpha.com

> On Sep 30, 2021, at 1:12 PM, Erik Kline <ek.ietf@gmail.com> wrote:
> 
> On Thu, Sep 30, 2021 at 12:55 PM Benjamin Kaduk <kaduk@mit.edu <mailto:kaduk@mit.edu>> wrote:
> On Sun, Sep 19, 2021 at 06:08:23PM -0700, Erik Kline via Datatracker wrote:
> [...]
> > [S3.5, question]
> > 
> > * Is there an example of what possible use a RST w/ data could serve?
> > 
> >   I didn't see anything in S3.10.7(.*) that indicated the data in a segment
> >   with the RST flag set could get processed (I may have missed it).
> 
> Section 4.2.2.12 of RFC 1122 (sorry, the section link doesn't work, though
> https://www.rfc-editor.org/rfc/rfc1122.html#page-87 <https://www.rfc-editor.org/rfc/rfc1122.html#page-87> gets most of the way
> there) has:
> 
>             A TCP SHOULD allow a received RST segment to include data.
> 
>             DISCUSSION
>                  It has been suggested that a RST segment could contain
>                  ASCII text that encoded and explained the cause of the
>                  RST.  No standard has yet been established for such
>                  data.
> 
> 
> Ah, so including such text in 3.10.7.* would have elevated some discussion to a level not (yet) warranted.  Makes sense, thank you.
> 
> I look forward to the forthcoming Proposed Standard for TCP RSTs containing XML-encoded documents of error explainer text.  :D
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