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Re: [tsvwg] UDP options and header-data split (zero copy)

Joe Touch <touch@strayalpha.com> Sun, 01 August 2021 21:56 UTC

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From: Joe Touch <touch@strayalpha.com>
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Date: Sun, 01 Aug 2021 14:56:45 -0700
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Subject: Re: [tsvwg] UDP options and header-data split (zero copy)
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> On Aug 1, 2021, at 2:33 PM, Joseph Touch <touch@strayalpha.com> wrote:
> 
>>> On Sun, Aug 1, 2021 at 10:48 AM Joseph Touch wrote:
>>> Also, the trailing variant allows per-reassembled options to be arbitrarily long (limited by the reassembled length), rather than requiring them to fit inside a single fragment.
>> 
>> 
>> If that is the intent, then draft-ietf-tsvwg-udp-options-13#section-5.5 needs significant clarification.
> 
> Yes; this is pending.

Fwiw I was assuming that field pointed to the start of the trailer options measured from the start of the UDP data (I might have forget that nuance in the -13 text) If that field points inside this fragment, it can help the split. If not, then the per reasssembled options could be split out only after reassembly. But they don’t need to fit in a single fragment. 

Joe

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