pfioc_tm
#define DIOCSETTIMEOUT _IOWR('D', 29, struct pfioc_tm)
#define DIOCGETTIMEOUT _IOWR('D', 30, struct pfioc_tm)
struct pfioc_tm *pt = (struct pfioc_tm *)addr;
struct pfioc_tm *pt = (struct pfioc_tm *)addr;
struct pfioc_tm pt;
bzero(&pt, sizeof(struct pfioc_tm));