NIO Pipeline Structure

[btoms20]

A rough outline of how a QUIC swift-nio pipeline could be structured...

General Pipeline Configuration

When the ConnectionMuxer instantiates a new Connection Pipeline it adds a StateHandler with the necessary Connection info. The StateHandler, once added to the pipeline, synchronously instantiates and adds a PacketProtectorHandler and an ACKHandler in front of itself in the pipeline. It also synchronously instantiates and adds a NIOSSLHandler behind itself in the pipeline. It then proceeds to send Crypto Frames along the pipeline into the NIOSSLHandler until the TLS Handshake has completed. At which point the StateHandler installs the StreamMuxerHandler and begins forwarding Stream Frames downstream as well. All other Frames are consumed by the StateHandler.

Updates

June 18th, 2023

The StateHandler (when added to the pipeline) installs the PacketProtectorHandler and ACKHandler in front of (before) itself as opposed to after itself in the original design / diagram.

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