rtw_duration
int rtw_compute_duration1(int, int, uint32_t, int, struct rtw_duration *);
int, struct rtw_duration *, struct rtw_duration *, int *, int);
struct rtw_duration *d)
int fraglen, int rate, struct rtw_duration *d0, struct rtw_duration *dn,
struct rtw_duration *d0;
struct rtw_duration ts_d0;
struct rtw_duration ts_dn;