__ifaddr
struct __ifaddr *addresses;
static int __inet_ifassign(sa_family_t, struct __ifaddr *, __ifaddr_type,
#define ifinfosize(n) (sizeof (struct ifinfo) + (n)*sizeof (struct __ifaddr))
localinfo->addresses = (struct __ifaddr *)
__inet_ifassign(sa_family_t af, struct __ifaddr *ifa, __ifaddr_type type,