fBoundToDevice
fBoundToDevice = boundTo;
if (fBoundToDevice == NULL)
unregister_device_handler(fBoundToDevice->device, fBoundType);
put_device_interface(fBoundToDevice);
return fBoundToDevice->device->mtu;
{ return fBoundToDevice != NULL; }
net_device_interface* fBoundToDevice;