Re: [Idr] draft-snijders-idr-rfc8203bis
"Jakob Heitz (jheitz)" <jheitz@cisco.com> Thu, 14 December 2017 19:31 UTC
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From: "Jakob Heitz (jheitz)" <jheitz@cisco.com>
To: Job Snijders <job@ntt.net>, Jeffrey Haas <jhaas@pfrc.org>
CC: "bruno.decraene@orange.com" <bruno.decraene@orange.com>, Peter Hessler <phessler@theapt.org>, "idr@ietf.org" <idr@ietf.org>
Thread-Topic: [Idr] draft-snijders-idr-rfc8203bis
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Date: Thu, 14 Dec 2017 19:31:21 +0000
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References: <20171208154735.GH61799@vurt.meerval.net> <3238CB61-EDB3-4C5D-813D-AC19362AB2CF@puck.nether.net> <CAEm8Q109fbvUuCMOOvnDBianMnTsYR9zdBzp-Jc84uVYt03TUA@mail.gmail.com> <20171214160102.GS37665@gir.theapt.org> <13067_1513271281_5A32AFF1_13067_469_1_53C29892C857584299CBF5D05346208A479212FF@OPEXCLILM21.corporate.adroot.infra.ftgroup> <20171214171446.GN95845@vurt.meerval.net> <4D213F3F-DAC8-4F18-ABA6-517A8213BFA7@pfrc.org> <20171214181721.GP95845@vurt.meerval.net>
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Subject: Re: [Idr] draft-snijders-idr-rfc8203bis
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The argument for Cyrillic makes sense. I have not seen any arguments for longer strings from any other language speakers. 255 keeps it simple. And sufficient. Thanks, Jakob -----Original Message----- From: Idr [mailto:idr-bounces@ietf.org] On Behalf Of Job Snijders Sent: Thursday, December 14, 2017 10:17 AM To: Jeffrey Haas <jhaas@pfrc.org> Cc: bruno.decraene@orange.com; Peter Hessler <phessler@theapt.org>; idr@ietf.org Subject: Re: [Idr] draft-snijders-idr-rfc8203bis On Thu, Dec 14, 2017 at 12:43:29PM -0500, Jeffrey Haas wrote: > > On Thu, Dec 14, 2017 at 05:08:00PM +0000, bruno.decraene@orange.com wrote: > >>> From: Idr idr-bounces@ietf.org On Behalf Of Peter Hessler > >>> The len field is 8 bits, which allows for a max of 255. > >>> > >>> If longer is desired, then we'll need a new error code point. > >> > >> Alternatively, another field may be added after the existing > >> "Shutdown Communication" field. Either as a replacement (setting > >> the length of the first field to zero) or as a concatenation. > > > > Bruno is right (of course, since the length field was his idea to > > begin with :-), there are options available to extend beyond 255 if > > needed. > > If the limit was 127 rather than 128, the top bit could have been > used. > > The closest thing that can be done will depend partly on what deployed > implementations do when 128 is exceed. The spec says nothing right > now... and thus you might not do anything beyond saying "up to 255 is > fine". Most of the open source implementations I'm aware of will log a message "invalid shutdown communication", and perhaps print a hexdump of that data. Since we're relatively early in the deployment cycle, I think it is feasible to upgrade the field and patch the existing implementations. > To get beyond 255, the simplest but gross one is to say "there may be > a second message after the shutdown communication field". If (and only if) we pick the route of going beyond 255, I'd consider deprecating RFC 8203 and have the new thing require the first byte to be a zero. I don't think there should be two 'shutdown communications'. > -- Jeff (and people wonder why I'm pushy about using large "length" > fields.) Not anymore! :) Kind regards, Job _______________________________________________ Idr mailing list Idr@ietf.org https://www.ietf.org/mailman/listinfo/idr
- [Idr] draft-snijders-idr-rfc8203bis Job Snijders
- Re: [Idr] draft-snijders-idr-rfc8203bis Jared Mauch
- Re: [Idr] draft-snijders-idr-rfc8203bis Thomas Mangin
- Re: [Idr] draft-snijders-idr-rfc8203bis Randy Bush
- Re: [Idr] draft-snijders-idr-rfc8203bis Joel Jaeggli
- Re: [Idr] draft-snijders-idr-rfc8203bis Kireeti Kompella
- Re: [Idr] draft-snijders-idr-rfc8203bis Jakob Heitz (jheitz)
- Re: [Idr] draft-snijders-idr-rfc8203bis Alexander Azimov
- Re: [Idr] draft-snijders-idr-rfc8203bis Christoph Loibl
- Re: [Idr] draft-snijders-idr-rfc8203bis Jeffrey Haas
- Re: [Idr] draft-snijders-idr-rfc8203bis Matsuzaki Yoshinobu
- Re: [Idr] draft-snijders-idr-rfc8203bis Peter Hessler
- Re: [Idr] draft-snijders-idr-rfc8203bis bruno.decraene
- Re: [Idr] draft-snijders-idr-rfc8203bis Job Snijders
- Re: [Idr] draft-snijders-idr-rfc8203bis Jeffrey Haas
- Re: [Idr] draft-snijders-idr-rfc8203bis Job Snijders
- Re: [Idr] draft-snijders-idr-rfc8203bis Jakob Heitz (jheitz)
- Re: [Idr] draft-snijders-idr-rfc8203bis Jeff Tantsura
- Re: [Idr] draft-snijders-idr-rfc8203bis Jeffrey Haas
- Re: [Idr] draft-snijders-idr-rfc8203bis Job Snijders