BLN_IOCTL_BASE
#define BLN_IOCTL_CURRENT (BLN_IOCTL_BASE | 0x1)
#define BLN_IOCTL_TARGET (BLN_IOCTL_BASE | 0x2)
#define BLN_IOCTL_LOW (BLN_IOCTL_BASE | 0x3)
#define BLN_IOCTL_HIGH (BLN_IOCTL_BASE | 0x4)
#define BLN_IOCTL_LIMIT (BLN_IOCTL_BASE | 0x5)