send_ls_update
int send_ls_update(struct ibuf *, struct iface *, struct in6_addr,
send_ls_update(buf, nbr->iface, addr, nlsa);
int send_ls_update(struct ibuf *, struct iface *, struct in_addr, u_int32_t);
send_ls_update(buf, nbr->iface, addr, nlsa);