pfioc_limit
struct pfioc_limit pl;
#define DIOCGETLIMIT _IOWR('D', 39, struct pfioc_limit)
#define DIOCSETLIMIT _IOWR('D', 40, struct pfioc_limit)
struct pfioc_limit *pl = (struct pfioc_limit *)addr;
struct pfioc_limit *pl = (struct pfioc_limit *)addr;