ip6_setpktoptions
if ((error = ip6_setpktoptions(m, opt, NULL, so->so_proto->pr_protocol, priv)) != 0) {
ip6_setpktoptions(struct mbuf *, struct ip6_pktopts *,
if ((error = ip6_setpktoptions(control, &opt,
if ((error = ip6_setpktoptions(control, &opt,