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Re: [quicwg/base-drafts] First byte changes (#2006)

Martin Thomson <notifications@github.com> Tue, 20 November 2018 01:34 UTC

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Subject: Re: [quicwg/base-drafts] First byte changes (#2006)
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martinthomson commented on this pull request.



>  
-: The fourth bit (0x10) of byte 0 is set to 1.
+: The next two bits (those with a mask of 0x18) of byte 0 are reserved.  These
+  bits are protected using header protection (see Section 5.4 of
+  {{QUIC-TLS}}).  The value included prior to protection MUST be set to 0.  An

To be clear, if client and server both agree to another use for these bits, they can be used for any purpose.  It's only unilateral experimentation that is prevented by the current arrangement, which - as other have said - is intentional.

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