bug: Net bridge will cause packets lost

[Azure-stars]

Now the naive net bridge has a bug. When different ifaces share a common socket set, packets will be polled by the iface which can't process it. And it will cause bugs like connect-time-out.

The codes are as below:

pub fn poll_interfaces(&self) {
    let timestamp =
        Instant::from_micros_const((current_time_nanos() / NANOS_PER_MICROS) as i64);

    LOOPBACK.lock().poll(
        timestamp,
        LOOPBACK_DEV.lock().deref_mut(),
        &mut self.0.lock(),
    );

    ETH0.poll(&self.0);
}