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Reserved frame types and the other reserved frame types #2997

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merged 2 commits into from Sep 6, 2019
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Reserved frame types and the other reserved frame types #2997

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Additional clarity on reserved frame types and the other reserved fra…
MikeBishop Aug 28, 2019
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Reserved anchor
MikeBishop Sep 6, 2019
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8 changes: 4 additions & 4 deletions draft-ietf-quic-http.md
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Expand Up @@ -422,7 +422,7 @@ PUSH_PROMISE frames are not part of the response; see {{server-push}} for more
details.

Frames of unknown types ({{extensions}}), including reserved frames
({{frame-grease}}) MAY be sent on a request or push stream before, after, or
({{frame-reserved}}) MAY be sent on a request or push stream before, after, or
interleaved with other frames described in this section.

The HEADERS and PUSH_PROMISE frames might reference updates to the QPACK dynamic
Expand Down Expand Up @@ -974,7 +974,7 @@ comparison between HTTP/2 and HTTP/3 frames is provided in {{h2-frames}}.
| GOAWAY | Yes | No | No | {{frame-goaway}} |
| MAX_PUSH_ID | Yes | No | No | {{frame-max-push-id}} |
| DUPLICATE_PUSH | No | Yes | No | {{frame-duplicate-push}} |
| Reserved | Yes | Yes | Yes | {{frame-grease} |
| Reserved | Yes | Yes | Yes | {{frame-reserved} |
{: #stream-frame-mapping title="HTTP/3 frames and stream type overview"}

Certain frames can only occur as the first frame of a particular stream type;
Expand Down Expand Up @@ -1374,7 +1374,7 @@ uses a Push ID that they have since consumed and discarded are forced to ignore
the DUPLICATE_PUSH.


### Reserved Frame Types {#frame-grease}
### Reserved Frame Types {#frame-reserved}

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Now that you're discussing H2 reserved types in this section, maybe it should be {#frame-reserved}?

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Perhaps, but those anchors don't appear in the final doc, so I care less. Still, there are only three references, so it's a minor change.

Frame types of the format `0x1f * N + 0x21` for integer values of N are reserved
to exercise the requirement that unknown types be ignored ({{extensions}}).
Expand Down Expand Up @@ -1524,7 +1524,7 @@ security considerations of {{!ALTSVC}} also apply.
Where HTTP/2 employs PADDING frames and Padding fields in other frames to make a
connection more resistant to traffic analysis, HTTP/3 can either rely on
transport-layer padding or employ the reserved frame and stream types discussed
in {{frame-grease}} and {{stream-grease}}. These methods of padding produce
in {{frame-reserved}} and {{stream-grease}}. These methods of padding produce
different results in terms of the granularity of padding, the effect of packet
loss and recovery, and how an implementation might control padding.

Expand Down