Eric,
can you please supply sample code for the two driver LLD_SEND_PACKET and LLD_GET_PACKET. This will allow us to compile the code, as well as get an idea of what is required to make the low level driver 'do its thing'.

Also, can you supply a sample program that uses the code, say as a telnet/ping session or whatever you used as a test program. This way, it helps us to write code that uses your drivers.