UdpDispatcher

Struct UdpDispatcher 

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pub struct UdpDispatcher { /* private fields */ }
Expand description

UDP L4 dispatcher (DP-01, #234): per-client session tracking with datagram forwarding and idle-session eviction.

The dispatcher owns the listener-side UdpSocket and a session table keyed by client SocketAddr. Each unique client gets a dedicated upstream UdpSocket; datagrams from the client are forwarded to the upstream, and responses from the upstream are forwarded back to the client. Sessions that are idle for longer than session_timeout are evicted.

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impl UdpDispatcher

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pub fn new(config: L4ProxyConfig) -> Self

Build a UDP dispatcher from the compiled config.

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pub async fn run( &self, listener: Arc<UdpSocket>, dp: &DataPlane, gateway: &Gateway, ) -> Result<(), L4Error>

Run the UDP dispatch loop: receive datagrams on the listener socket, forward them to per-client upstream sockets, and forward responses back. Sessions are evicted after the idle timeout.

This method runs until the listener socket is closed (graceful shutdown). It spawns two tasks per session: one for client->upstream forwarding (handled inline on recv) and one for upstream->client forwarding (spawned per session).

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