outzone
outzone(&zones[i], j - i);
static void outzone(const struct zone * zp, ptrdiff_t ntzones);
uint32_t inzone, outzone;
inzone = outzone = ~0;
if (in6_setscope(&src_in6, rt->rt_ifp, &outzone) != 0 ||
inzone != outzone) {
in6_getscopename(&ip6->ip6_src), inzone, outzone);
inzone = outzone = ~0;
in6_setscope(&dst_in6, rt->rt_ifp, &outzone) != 0 ||
inzone != outzone) {
in6_getscopename(&ip6->ip6_dst), inzone, outzone);