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Re: [tsvwg] UDP Options Implementation Update

Joe Touch <touch@strayalpha.com> Mon, 05 November 2018 15:14 UTC

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From: Joe Touch <touch@strayalpha.com>
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Date: Mon, 05 Nov 2018 07:14:41 -0800
Cc: G Fairhurst <gorry@erg.abdn.ac.uk>, tsvwg@ietf.org, "tom@erg.abdn.ac.uk" <tom@erg.abdn.ac.uk>
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References: <5BDFE320.9030802@erg.abdn.ac.uk> <20181105063300.GA14271@tom-desk.erg.abdn.ac.uk> <20181105122227.GA12854@bugle.employees.org>
To: Derek Fawcus <dfawcus+lists-tsvwg@employees.org>
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Subject: Re: [tsvwg] UDP Options Implementation Update
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This is an opportunity to fix a bug.  We don’t design protocols to withstand arbitrary coding errors. This should remain optional.

Joe

> On Nov 5, 2018, at 4:22 AM, Derek Fawcus <dfawcus+lists-tsvwg@employees.org> wrote:
> 
>> On Mon, Nov 05, 2018 at 06:33:00AM +0000, tom@erg.abdn.ac.uk wrote:
>> 
>> At IETF-103 we are presenting the CCO
>> (draft-fairhurst-udp-options-cco, see maprg and tsvwg second meeting).
>> We think use of the CCO is required on the internet and an checksum
>> using the CCO pseudo header should replace the OCS.
>> 
>> xx      4         Checksum Compensation Option (CCO)    - An alternative approach to OCS
> 
> Oh - I like that.
> 
> Have you actually observed any middlebox corruption or mis-checking along the lines mentioned?
> 
> If so, then it would seem this new option would be mandatory to include in
> all UDP packets containing UDP options.
> 
> DF

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