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RE: Reserved HTTP Frames

Mike Bishop <mbishop@evequefou.be> Thu, 09 August 2018 15:52 UTC

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From: Mike Bishop <mbishop@evequefou.be>
To: Ryan Hamilton <rch@google.com>, IETF QUIC WG <quic@ietf.org>
Subject: RE: Reserved HTTP Frames
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Date: Thu, 09 Aug 2018 15:51:56 +0000
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No overflows.  The IANA section is more exhaustive:

Additionally, each code of the format 0xb + (0x1f * N) for values of N in the range (0..7) (that is, 0xb, 0x2a, 0x49, 0x68, 0x87, 0xa6, 0xc5, and 0xe4), the following values should be registered:

From: Ryan Hamilton <rch@google.com>
Sent: Wednesday, August 8, 2018 2:13 PM
To: IETF QUIC WG <quic@ietf.org>; Mike Bishop <mbishop@evequefou.be>
Subject: Reserved HTTP Frames

I've a question about this text from the HTTP mapping doc:

4.2.1<https://tools.ietf.org/html/draft-ietf-quic-http-13#section-4.2.1>.  Reserved Frame Types





   Frame types of the format "0xb + (0x1f * N)" are reserved to exercise

   the requirement that unknown types be ignored.

For what values of "N" are we talking about? I assume [0,8)? Because, unless I'm doing the math wrong, if N can be [0,256) (and we're doing uint8_t math) then that covers all possible values.

Cheers,

Ryan

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