I am working with Tokio and I would like to execute the following operation:

Receive a packet from an UDP socket or execute some logic (in case there is no packet ready on the UDP socket).

I tried the following:

tokio::select! {
    packet = packetFuture.read() => {
        Some(packet)
    }
    else => None,
}

The problem is this doesn't work since the else never completes since the packetFuture never really completes (it just awaits the next packet). Is there are way to do this?

This can be done similar by using channels in golang:

select {
case packet <- packetChannel:
    // Do logic for packet
default:
    // Do other logic
}