Re: [quicwg/base-drafts] Clarify that clients don't need to remember unknown SETTINGS (#3113)

Martin Thomson <notifications@github.com> Tue, 22 October 2019 00:49 UTC

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Date: Mon, 21 Oct 2019 17:49:20 -0700
From: Martin Thomson <notifications@github.com>
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Subject: Re: [quicwg/base-drafts] Clarify that clients don't need to remember unknown SETTINGS (#3113)
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martinthomson approved this pull request.



> @@ -1229,10 +1229,13 @@ A server MAY accept 0-RTT and subsequently provide different settings in its
 SETTINGS frame. If 0-RTT data is accepted by the server, its SETTINGS frame MUST
 NOT reduce any limits or alter any values that might be violated by the client
 with its 0-RTT data.  The server MUST include all settings which differ from
-their default values.  If a server accepts 0-RTT, but then sends a SETTINGS
-frame which reduces a setting the client understands or omits a value that was
-previously specified to have a non-default value, this MUST be treated as a
-connection error of type HTTP_SETTINGS_ERROR.
+their default values.  If a server accepts 0-RTT but then sends a SETTINGS
+frame which reduces setting the client understands, this MUST be treated as a

An interesting consequence of the "reduces" clause here is that you can't define a "supports" setting with 0=supports and 1=doesn't support.

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