fn try_handle_enclave_event()

in src/enclave_proc/mod.rs [191:216]

• 18 lines of code
• 4 McCabe index (conditional complexity)

fn try_handle_enclave_event(connection: &Connection) -> NitroCliResult<HandledEnclaveEvent> {
    // Check if this is an enclave connection.
    if let Some(mut enc_events) = connection
        .get_enclave_event_flags()
        .map_err(|e| e.add_subaction("Failed to get enclave events flag".to_string()))?
    {
        let enc_hup = enc_events.contains(EpollFlags::EPOLLHUP);

        // Check if non-hang-up events have occurred.
        enc_events.remove(EpollFlags::EPOLLHUP);
        if !enc_events.is_empty() {
            warn!("Received unexpected enclave event(s): {:?}", enc_events);
        }

        // If we received the hang-up event we need to terminate cleanly.
        if enc_hup {
            warn!("Received hang-up event from the enclave. Enclave process will shut down.");
            return Ok(HandledEnclaveEvent::HangUp);
        }

        // Non-hang-up enclave events are not fatal.
        return Ok(HandledEnclaveEvent::Unexpected);
    }

    Ok(HandledEnclaveEvent::None)
}