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[HTTP/3] Update ALPN to h3 #55894

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JamesNK opened this issue Jul 19, 2021 · 2 comments · Fixed by #56215
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[HTTP/3] Update ALPN to h3 #55894

JamesNK opened this issue Jul 19, 2021 · 2 comments · Fixed by #56215
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@CarnaViire
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area-System.Net.Http enhancement Product code improvement that does NOT require public API changes/additions
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6.0.0

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@JamesNK
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JamesNK commented Jul 19, 2021 •
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The latest draft has finalized "h3" as the ALPN identifier.

https://datatracker.ietf.org/doc/html/draft-ietf-quic-http-34#appendix-B.1

  • Removed draft version guidance; added final version string

https://datatracker.ietf.org/doc/html/draft-ietf-quic-http-34#section-3

A client MAY attempt access to a resource with an "https" URI by
resolving the host identifier to an IP address, establishing a QUIC
connection to that address on the indicated port (including
validation of the server certificate as described above), and sending
an HTTP/3 request message targeting the URI to the server over that
secured connection. Unless some other mechanism is used to select
HTTP/3, the token "h3" is used in the Application Layer Protocol
Negotiation (ALPN; see [RFC7301]) extension during the TLS handshake.

https://datatracker.ietf.org/doc/html/draft-ietf-quic-http-34#section-11.1

This document creates a new registration for the identification of
HTTP/3 in the "Application Layer Protocol Negotiation (ALPN) Protocol
IDs" registry established in [RFC7301].

The "h3" string identifies HTTP/3:

Protocol: HTTP/3

Identification Sequence: 0x68 0x33 ("h3")

Specification: This document
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ghost commented Jul 19, 2021

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Issue Details

The latest draft has finalized "h3" as the ALPN identifier.

https://datatracker.ietf.org/doc/html/draft-ietf-quic-http-34#appendix-B.1

https://datatracker.ietf.org/doc/html/draft-ietf-quic-http-34#section-3
https://datatracker.ietf.org/doc/html/draft-ietf-quic-http-34#section-11.1

Author: JamesNK
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area-System.Net.Http
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@dotnet-issue-labeler dotnet-issue-labeler bot added the untriaged New issue has not been triaged by the area owner label Jul 19, 2021
@karelz karelz added this to the 6.0.0 milestone Jul 19, 2021
@karelz karelz added enhancement Product code improvement that does NOT require public API changes/additions and removed untriaged New issue has not been triaged by the area owner labels Jul 19, 2021
@geoffkizer
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Pretty sure this is at least part of the underlying issue for #54726

@JamesNK JamesNK mentioned this issue Jul 19, 2021
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@karelz karelz changed the title HTTP/3: Update ALPN to h3 [HTTP/3] Update ALPN to h3 Jul 20, 2021
@CarnaViire CarnaViire mentioned this issue Jul 23, 2021
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@ghost ghost added the in-pr There is an active PR which will close this issue when it is merged label Jul 23, 2021
@ghost ghost removed the in-pr There is an active PR which will close this issue when it is merged label Jul 29, 2021
@ghost ghost locked as resolved and limited conversation to collaborators Aug 28, 2021
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Fix HTTP/3 ALPN CarnaViire/runtime
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@JamesNK @CarnaViire @karelz @geoffkizer