getnbrinfo
nbi = getnbrinfo(&sin6->sin6_addr, p->if_index,
static struct in6_nbrinfo *getnbrinfo(struct in6_addr *addr,
nbi = getnbrinfo(&sin6.sin6_addr, PR.if_index,
nbi = getnbrinfo(&sin->sin6_addr, sdl->sdl_index, 1);