dhcpv6_for_each_option(&h[1], oend, otype, olen, d) {
if (otype == DHCPV6_OPT_IA_PREFIX && (olen + 4) >=
(uint16_t)sizeof(struct dhcpv6_ia_prefix)) {
dhcpv6_for_each_option(&h[1], oend, otype, olen, d) {
if (otype == DHCPV6_OPT_IA_PREFIX && (olen + 4) >=
(uint16_t)sizeof(struct dhcpv6_ia_prefix)) {