MsQuic is a Microsoft implementation of the IETF QUIC protocol. It is cross-platform, written in C and designed to be a general purpose QUIC library. MsQuic also has C++ API wrapper classes and exposes interop layers for both Rust and C#.
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QUIC has many benefits when compared to existing "TLS over TCP" scenarios:
- All packets are encrypted and handshake is authenticated with TLS 1.3.
- Parallel streams of (reliable and unreliable) application data.
- Exchange application data in the first round trip (0-RTT).
- Improved congestion control and loss recovery.
- Survives a change in the clients IP address or port.
- Stateless load balancing.
- Easily extendable for new features and extensions.
MsQuic has several features that differentiates it from other QUIC implementations:
- Optimized for client and server.
- Optimized for maximal throughput and minimal latency.
- Asynchronous IO.
- Receive side scaling (RSS) support.
- UDP send and receive coalescing support.
- Kernel stack bypass via XDP.
- For platform support details, see the Platforms docs.
- For release details and supported versions, see the Release docs.
- For performance data, see the Performance dashboard.
- For building the library, see the Build docs.
- For testing the library, see the Testing docs.
- For using the API, see the API docs or the Sample.
- For running a sample server and client app, see the Quick Start Guide.
- For deploying QUIC, see the Deployment docs.
- For diagnosing issues, see the Diagnostics docs and the Trouble Shooting Guide.
- For other frequently asked questions, see the FAQs.
- For contributor guides and internal design docs, see the Contributor docs.
For information on contributing, please see our contribution guidelines. Feel free to take a look at our Good First Issues list if you're looking for somewhere to start. If you'd just like to talk, come chat with us on Discord.