# A QUIC implementation in pure Go

[![Documentation](https://img.shields.io/badge/docs-quic--go.net-red?style=flat)](https://quic-go.net/docs/)
[![PkgGoDev](https://pkg.go.dev/badge/github.com/quic-go/quic-go)](https://pkg.go.dev/github.com/quic-go/quic-go)

quic-go is an implementation of the QUIC protocol ([RFC 9000](https://datatracker.ietf.org/doc/html/rfc9000), [RFC 9001](https://datatracker.ietf.org/doc/html/rfc9001), [RFC 9002](https://datatracker.ietf.org/doc/html/rfc9002)) in Go. It has support for HTTP/3 ([RFC 9114](https://datatracker.ietf.org/doc/html/rfc9114)), including QPACK ([RFC 9204](https://datatracker.ietf.org/doc/html/rfc9204)) and HTTP Datagrams ([RFC 9297](https://datatracker.ietf.org/doc/html/rfc9297)).

In addition to these base RFCs, it also implements the following RFCs:

* Unreliable Datagram Extension ([RFC 9221](https://datatracker.ietf.org/doc/html/rfc9221))
* Datagram Packetization Layer Path MTU Discovery (DPLPMTUD, [RFC 8899](https://datatracker.ietf.org/doc/html/rfc8899))
* QUIC Version 2 ([RFC 9369](https://datatracker.ietf.org/doc/html/rfc9369))
* QUIC Event Logging using qlog
* QUIC Stream Resets with Partial Delivery

Support for WebTransport over HTTP/3 is implemented in [webtransport-go](https://github.com/quic-go/webtransport-go).

Detailed documentation can be found on [quic-go.net](https://quic-go.net/docs/).

## FIPS 140-3

Starting with v0.60, quic-go supports use in FIPS 140-3 environments when built with Go 1.26 or newer, using Go standard library cryptography for the QUIC code paths relevant in FIPS mode.

## Projects using quic-go

| Project | Description |
|---------|-------------|
| [AdGuardHome](https://github.com/AdguardTeam/AdGuardHome) | Free and open source, powerful network-wide ads & trackers blocking DNS server. |
| [caddy](https://github.com/caddyserver/caddy/) | Fast, multi-platform web server with automatic HTTPS |
| [cloudflared](https://github.com/cloudflare/cloudflared) | A tunneling daemon that proxies traffic from the Cloudflare network to your origins |
| [frp](https://github.com/fatedier/frp) | A fast reverse proxy to help you expose a local server behind a NAT or firewall to the internet |
| [go-libp2p](https://github.com/libp2p/go-libp2p) | libp2p implementation in Go |
| [Hysteria](https://github.com/apernet/hysteria) | A powerful, lightning fast and censorship resistant proxy |
| [syncthing](https://github.com/syncthing/syncthing/) | Open Source Continuous File Synchronization |
| [traefik](https://github.com/traefik/traefik) | The Cloud Native Application Proxy |

## Release Policy

quic-go always aims to support the latest two Go releases.

## Contributing

We are always happy to welcome new contributors! We have a number of self-contained issues that are suitable for first-time contributors, they are tagged with [help wanted](https://github.com/quic-go/quic-go/issues?q=is%3Aissue+is%3Aopen+label%3A%22help+wanted%22).

## License

The code is licensed under the MIT license.

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