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Re: [tcpm] Comments to draft-ietf-tcpm-tcp-edo-13

"D. Wythe" <alibuda@linux.alibaba.com> Mon, 27 November 2023 07:16 UTC

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Date: Mon, 27 Nov 2023 15:16:46 +0800
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From: "D. Wythe" <alibuda@linux.alibaba.com>
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Subject: Re: [tcpm] Comments to draft-ietf-tcpm-tcp-edo-13
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On 11/24/23 10:11 PM, Joe Touch wrote:
>> On Nov 23, 2023, at 11:46 AM, rs.ietf@gmx.at wrote:
>>
>> In
>> general, reflecting unknown options and flags is a very bad practise -
>> as the semantics of these extentions are unknown.
> In general, it typically is used to confirm support for an option so it’s especially wrong.
>
> One way to catch this bug may be reflect EDO with 3 bytes. The bad part is that it might not fit in the option space in the SYN-ACK (if it barely fit in the SYN, eg).
>
> I think this should just be a bug that is reported or fixed, though.

Hi Joe,

Yes, we have tried negotiating TCP options with different values to 
avoid this issue. However, upon further understanding of the cause of 
this problem,
we have discovered that it may only exist in certain organizations. I am 
inclined not to introduce more complexity to the protocol.

Best wishes,
D. Wythe
> Joe

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