I am trying to implement ioctls with a network driver.  However I am
confused as to where the driver is.  In order to find the file descriptor
of  a character devices  one simply uses 
file =fopen("dev/foo","r"); 
fd=fileno(file);
and 
ioctl(fd,cmd,arg);
but the network interface doesn't appear on the filesystem.  what do i do?
mike