btreq
struct btreq btr;
struct btreq btr;
#define SIOCGBTINFO _IOWR('b', 5, struct btreq) /* get unit info */
#define SIOCGBTINFOA _IOWR('b', 6, struct btreq) /* get info by address */
#define SIOCNBTINFO _IOWR('b', 7, struct btreq) /* next unit info */
#define SIOCSBTFLAGS _IOWR('b', 8, struct btreq) /* set unit flags */
#define SIOCSBTPOLICY _IOWR('b', 9, struct btreq) /* set unit link policy */
#define SIOCSBTPTYPE _IOWR('b', 10, struct btreq) /* set unit packet type */
#define SIOCGBTSTATS _IOWR('b', 11, struct btreq) /* get unit statistics */
#define SIOCZBTSTATS _IOWR('b', 12, struct btreq) /* zero unit statistics */
#define SIOCBTDUMP _IOW('b', 13, struct btreq) /* print debug info */
#define SIOCSBTSCOMTU _IOWR('b', 17, struct btreq) /* set sco_mtu value */
struct btreq *btr = data;
memset(btr, 0, sizeof(struct btreq));
static struct btreq btr;