nd_neighbor_solicit
__CTASSERT(sizeof(struct nd_neighbor_solicit) == 24);
if (icmp6len < sizeof(struct nd_neighbor_solicit))
struct nd_neighbor_solicit *nd_ns;
IP6_EXTHDR_GET(nd_ns, struct nd_neighbor_solicit *, m, off, icmp6len);
struct nd_neighbor_solicit *nd_ns;
nd_ns = (struct nd_neighbor_solicit *)(ip6 + 1);