_ReadMACAddress
status_t result = _ReadMACAddress(&address);
status_t _ReadMACAddress(ether_address_t *address);
if (_ReadMACAddress(device, macBuffer) != B_OK
if (_ReadMACAddress(fDevice, fMACAddress) != B_OK) {
status_t _ReadMACAddress(usb_device device, uint8 *buffer);
status = _ReadMACAddress(fDevice, fMACAddress);
status_t _ReadMACAddress(usb_device device, uint8 *buffer);