kennethlaskoski / swift-quic

Swift implementation of the quic protocol.

SwiftQuic

SwiftQuic is an open-source Swift implementation of the QUIC protocol.

⚠️ This implementation is under heavy development and is not ready for production!

Current Progress

• Complete a standard handshake using TLS 1.3
• Open a stream and echo data

Note: The above can be done between either...

• A Swift Server and Client or
• Between Swift and Go (using the Go Quic library)
  • Check out the GoInteropTests for more info.

How It Works

• All of the Crypto stuff is mostly contained within the Crypto folder and the PacketProtectorHandler
• The NIO Pipeline configuration is discussed here
• The TLS Handshake uses a slightly modified version of swift-nio-ssl available here
• The main connection logic is handled in the read and write methods of the Client and Server Handlers for the time being (these will eventually be merged into a more generalized StateHandler).

TODO's

• A proper / robust Handshake algorithm that handles versions negotiation, 0RTT data, etc...
• A proper / robust ACK Handler / Emitter
• A proper / robust Connection Muxer
• A proper / robust Stream Muxer
• Connection State Management
• Stream State Management
• Connection and Stream termination / clean up
• HTTP3 support
• Connection and Stream API
• ... Everything else 😅

There's loads to do, so if you can, please feel free to contribute to the project 🤝

If you have any questions or comments please start a discussion, we're happy to chat!

Credit

• SwiftNIO - Most of the NIO networking code is heavily inspired by existing NIO projects. Massive thanks and credit to the SwiftNIO team.
• Quiche
• Go Quic
• Kenneth Laskoski for kickstarting this effort!