Support draft-ietf-masque-h3-datagram-09

This CL adds support for HTTP Datagrams draft-09. The main difference between draft-04 and draft-09 is the removal of context IDs and their registration, but those have already been fully removed from our codebase in previous CLs. The only remaining difference is the value of the h3 setting. This CL intentionally keeps WebTransport on draft-04: we want to keep our only production deployment off of the final setting codepoint in case there are last-minute changes to the specification. HTTP Datagrams are not used in any of our production servers so we can modify this code without flag protection.

PiperOrigin-RevId: 448347052
9 files changed
tree: 1a9395a8cf858c235408935029685d4e8b1b5ba4
  1. quiche/


QUICHE stands for QUIC, Http, Etc. It is Google‘s production-ready implementation of QUIC, HTTP/2, HTTP/3, and related protocols and tools. It powers Google’s servers, Chromium, Envoy, and other projects. It is actively developed and maintained.

There are two public QUICHE repositories. Either one may be used by embedders, as they are automatically kept in sync:

To embed QUICHE in your project, platform APIs need to be implemented and build files need to be created. Note that it is on the QUICHE team's roadmap to include default implementation for all platform APIs and to open-source build files. In the meanwhile, take a look at open source embedders like Chromium and Envoy to get started:

To contribute to QUICHE, follow instructions at

QUICHE is only supported on little-endian platforms.