On page 11 of the QNX Networking 6.4 Webinar presentation, TDP (qnet) is shown interfacing with the link layer using "
Ether Hook".

I googled Ether hook and came up with a VxWorks library that allows a direct interface to ethernet packets bypassing the
 protocol layers.

Does io-pkt implement ether hook?  What is the interface between drivers and protocol layers for sending and receiving 
ethernet packets?

Thanks,
Mike