> On Jul 4, 2017, at 4:35 PM, Vladimir Olteanu <[email protected]>
> wrote:
>
> * We avoid using the SYN's payload as extra option space (which, I think,
> goes against TCP's core philosophy).
It's not philosophy - it's a requirement for backward compatibility as required
for receivers not supporting new options in the SYN.
See https://tools.ietf.org/html/draft-touch-tcpm-tcp-syn-ext-opt-06
Issues are discussed in detail in sec 8 of
https://tools.ietf.org/html/draft-ietf-tcpm-tcp-edo-06
Joe
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