Enum Tunnel 

pub enum Tunnel {
    Bidi {
        client: Box<dyn AsyncReadWrite + Send>,
        upstream: Box<dyn AsyncReadWrite + Send>,
        close_reason_tx: Option<Sender<CloseReason>>,
    },
    Udp(UdpTunnel),
}

Bridge between the executor’s ByteTunnel arm and a fetch’s chosen transport. Bidi is the stream-pair shape that tokio::io::copy_bidirectional consumes — covers TCP forward, TLS passthrough, and the H1 WebSocket post-upgrade path. Udp is the session-driven shape: the fetch has already spawned the per-5-tuple forwarder task; the executor’s role degenerates to awaiting join so ConnContext cleanup runs at the right moment.

See spec/architecture/06-l4.md § udp_dispatch for the UDP session lifecycle and § l4_forward for the TCP arm.

Variants

Bidi

Fields

client: Box<dyn AsyncReadWrite + Send>

upstream: Box<dyn AsyncReadWrite + Send>

close_reason_tx: Option<Sender<CloseReason>>

Udp(UdpTunnel)