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Alt-Svc quic= a list #1097

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Feb 6, 2018
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Alt-Svc quic= a list #1097

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Alt-Svc quic= a list
MikeBishop Feb 5, 2018
593bba4
Exercise (and mention) reserved version numbers
MikeBishop Feb 5, 2018
419eb0f
@LPardue's feedback
MikeBishop Feb 6, 2018
2c04337
Better text about example reserved versions
MikeBishop Feb 6, 2018
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15 changes: 10 additions & 5 deletions draft-ietf-quic-http.md
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Expand Up @@ -127,7 +127,10 @@ port.

This document defines the "quic" parameter for Alt-Svc, which MAY be used to
provide version-negotiation hints to HTTP/QUIC clients. QUIC versions are
four-octet sequences with no additional constraints on format. Syntax:
four-octet sequences with no additional constraints on format. Leading zeros
SHOULD be omitted for brevity.

Syntax:

~~~ abnf
quic = DQUOTE version-number [ "," version-number ] * DQUOTE
Expand All @@ -138,14 +141,16 @@ For example, if a server supported both version 0x00000001 and the version
rendered in ASCII as "Q034", it could specify the following header:

~~~ example
Alt-Svc: hq=":49288";quic="1,51303334"
Alt-Svc: hq=":49288";quic="1,dadababa,51303334"
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@LPardue LPardue Feb 5, 2018 •
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0xdadababa value is not explained in preceding paragraph.

~~~

Where multiple versions are listed, the order of the values reflects the
server's preference (with the first value being the most preferred version).
Leading zeros SHOULD be omitted for brevity. Origins SHOULD list only versions
which are supported by the alternative, but MAY omit supported versions for any
reason.
Reserved versions MAY be listed, but unreserved versions which are not supported
by the alternative SHOULD NOT be present in the list. Origins MAY omit supported
versions for any reason.

Clients MUST ignore any included versions which they do not support.


## Connection Establishment {#connection-establishment}
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