[quicwg/base-drafts] HTTP/3 reserved value range (#2606)

Lucas Pardue <notifications@github.com> Wed, 10 April 2019 21:42 UTC

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Date: Wed, 10 Apr 2019 21:42:01 +0000
From: Lucas Pardue <notifications@github.com>
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Subject: [quicwg/base-drafts] HTTP/3 reserved value range (#2606)
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The definition of reserved ranges (AKA GREASE values) seems a bit off, e.g. section 10.3 in draft 19:

```
   Additionally, each code of the format "0x1f * N + 0x21" for integer
   values of N (that is, "0x21", "0x40", ..., through
   "0x3FFFFFFFFFFFFFFE") MUST NOT be assigned by IANA.
```

The frame type is sent on the wire using a varint, which is limited to a value of 2^62. Should we only reserve frame types that can be sent on the wire?

This applies also to settings parameters and unidirectional stream types.

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