Struct UdpTunnel 

pub struct UdpTunnel {
    pub join: Pin<Box<dyn Future<Output = CloseReason> + Send>>,
    pub cancel: CancellationToken,
}

Handle for an in-flight UDP session whose forwarder task already runs in the background. join resolves with the session’s terminal CloseReason after the forwarder unwinds (idle timeout, peer EOF, listener cancellation, or upstream send failure). cancel propagates the executor’s cancel token (typically the listener’s force_cancel) into the forwarder loop. The fetch is responsible for inserting the matching DispatchTable entry on session start and removing it as the join future resolves — vane-core stays agnostic about the table type.

Fields

join: Pin<Box<dyn Future<Output = CloseReason> + Send>>

cancel: CancellationToken