static int prefixcmp(const void *va, const void *vb)
{
const struct odhcpd_ipaddr *a = va, *b = vb;
- uint32_t a_pref = ((a->addr.s6_addr[0] & 0xfe) != 0xfc) ? a->preferred : 1;
- uint32_t b_pref = ((b->addr.s6_addr[0] & 0xfe) != 0xfc) ? b->preferred : 1;
+ uint32_t a_pref = IN6_IS_ADDR_ULA(&a->addr) ? 1 : a->preferred;
+ uint32_t b_pref = IN6_IS_ADDR_ULA(&b->addr) ? 1 : b->preferred;
return (a_pref < b_pref) ? 1 : (a_pref > b_pref) ? -1 : 0;
}