icmp_ad_info
u.ad.icmp_ad_asize = sizeof (u.ad.icmp_ad_info[0])/4;
u.ad.icmp_ad_info[0].icmp_ad_pref = htonl(ifp->int_rdisc_pref);
u.ad.icmp_ad_info[0].icmp_ad_addr = ifp->int_addr;
wp = &p->ad.icmp_ad_info[0].icmp_ad_addr;
sizeof (p->ad.icmp_ad_info[0])) {
sizeof (p->ad.icmp_ad_info) +
sizeof (p->ad.icmp_ad_info[0])))) {
wp = &p->ad.icmp_ad_info[0].icmp_ad_addr;
} icmp_ad_info[1];