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Re: [quicwg/base-drafts] Explain that NST.max_stream_data is needed for 0-RTT. (#943)

ekr <notifications@github.com> Sun, 19 November 2017 04:28 UTC

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Date: Sun, 19 Nov 2017 04:28:22 +0000
From: ekr <notifications@github.com>
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Subject: Re: [quicwg/base-drafts] Explain that NST.max_stream_data is needed for 0-RTT. (#943)
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ekr commented on this pull request.



> @@ -1421,7 +1421,12 @@ enable 0-RTT in TCP.
 All the restrictions on the use of 0-RTT apply, with the exception of the ALPN
 label, which MUST only change to a label that is explicitly designated as being
 compatible.  The client indicates which ALPN label it has chosen by placing that
-ALPN label first in the ALPN extension.
+ALPN label first in the ALPN extension. In order to be usable for 0-RTT,
+the NewSessionTicket MUST contain the "max_early_data" extension with the
+value 0xffffffff; the amount of data which the client can send in 0-RTT
+is controlled by the "initial_max_data" and "initial_max_stream_data"
+parameters supplied by the server. It is an error for the server to provide
+any other value for "max_early_data".

PROTOCOL_VIOLATION perhaps?

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