How does a NIC driver activate with upper layer mutually?
How can I know whether the packets recieved from network by my own NIC driver are transmitted to upper layer(IP layer) or not?
How can I know if the packets come from upper layer are passed to my own NIC driver and go out further?
Is there any shell command or utility show that information?
The symptom of my running driver is as if the driver is seperated from the upper layer comletely! The "ping" or "scp" command cannot go through the driver and the received packets by the driver cannot pass to upper layer!