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Re: [tsvwg] RDMA Support by UDP FRAG Option

Joseph Touch <touch@strayalpha.com> Mon, 21 June 2021 03:58 UTC

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From: Joseph Touch <touch@strayalpha.com>
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Date: Sun, 20 Jun 2021 20:58:22 -0700
Cc: Gorry Fairhurst <gorry@erg.abdn.ac.uk>, TSVWG <tsvwg@ietf.org>
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To: Tom Herbert <tom@herbertland.com>
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Subject: Re: [tsvwg] RDMA Support by UDP FRAG Option
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> On Jun 20, 2021, at 8:43 PM, Tom Herbert <tom@herbertland.com> wrote:
> 
> 
> 
> On Sun, Jun 20, 2021, 8:04 PM Joseph Touch <touch@strayalpha.com <mailto:touch@strayalpha.com>> wrote:
> 
> 
>> On Jun 20, 2021, at 6:24 PM, Tom Herbert <tom@herbertland.com <mailto:tom@herbertland.com>> wrote:
> …
> 
> Length  is the length  in octets  of this user datagram  including  this
> header  and the data.   (This  means  the minimum value of the length is
> eight.)
> 
> Please stop repeating any claim to the contrary, except to note an error in an existing implementation (which should be corrected, not propagated).
> 
> I am describing how real implementation actually *works*.

I do not doubt that, but you *are* propagating an error.

> There is no error because the correct checksum per RFC768 can be produced.

That logic is equivalent to “we do math in base 6” because you only ever tried to add 2+2=4. 

It’s both faulty as logic and incorrect.

Joe

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