Enum ManagerInput 

pub enum ManagerInput<'a> {
    ClientDatagram {
        src: SocketAddr,
        payload: &'a [u8],
        backends: &'a mut dyn BackendSource,
    },
    BackendDatagram {
        flow: FlowId,
        payload: &'a [u8],
    },
    Config(ConfigEvent),
}

Inputs the shell feeds into the manager. Borrows the recv buffer; the core copies into an owned Vec<u8> only on admission.

Debug is hand-written rather than derived because ManagerInput::ClientDatagram carries a &mut dyn BackendSource, which has no Debug bound and should not gain one for a diagnostic. The mux’s Position renders itself the same way and for the same reason: the handle is elided, everything else is shown.

Variants

ClientDatagram

A datagram from a client. Admitted into an existing/new flow or dropped.

Carries the backend view because this is the only input that selects: admission resolves a backend before the flow exists, so the view arrives with the datagram that needs it rather than on every entry point. Three of the four inputs cannot select, and a signature that demanded a backend set from all of them would say otherwise.

Fields

src: SocketAddr

Real (pre-NAT) client source address.

payload: &'a [u8]

Borrowed datagram bytes.

backends: &'a mut dyn BackendSource

The backend set to select from, for this admission only.

BackendDatagram

A datagram from a backend, tagged by the shell with the owning flow (upstream_token -> FlowId). Drives the symmetric NAT return path.

Fields

flow: FlowId

Flow that owns the connected upstream socket this arrived on.

payload: &'a [u8]

Borrowed datagram bytes.

Config(ConfigEvent)

A control-plane / health event (add/remove backend, LB algo, timeouts, per-cluster knobs, drain). Never allocates a flow.

Trait Implementations

impl Debug for ManagerInput<'_>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.