rib_print_family
const char *upper_str = rib_print_family(llentry_get_upper_family(lle, family));
const char *rib_print_family(int family);
const char *upper_str = rib_print_family(nh->nh_priv->nh_upper_family);
rib_print_family(_fam), _fib, __func__, ##__VA_ARGS__); \
rib_print_family(sa->sa_family), sa->sa_family, if_name(ifp));
ifa, rib_print_family(sa->sa_family), sa->sa_family, if_name(ifp));