if_mcast_op
int if_mcast_op(ifnet_t *, const unsigned long, const struct sockaddr *);
error = if_mcast_op(mib->ifvm_p, SIOCADDMULTI, sa);
error = if_mcast_op(mib->ifvm_p, SIOCDELMULTI, sa);
(void)if_mcast_op(mib->ifvm_p, SIOCDELMULTI,
if (if_mcast_op(ifp, SIOCADDMULTI, sintosa(&sin)) != 0) {
if_mcast_op(inm->inm_ifp, SIOCDELMULTI, sintosa(&sin));
error = if_mcast_op(ifp, SIOCADDMULTI, sa);
error = if_mcast_op(ifp, SIOCDELMULTI, sa);
(void)if_mcast_op(ifp, SIOCDELMULTI, sstosa(&mc->mc_addr));
error = if_mcast_op(ifp, SIOCADDMULTI, sintosa(&sin));
if_mcast_op(ifp, SIOCDELMULTI, sintosa(&sin));
if_mcast_op(ifp, SIOCDELMULTI,
error = if_mcast_op(ifp, SIOCADDMULTI, sin6tosa(&sin6));
if_mcast_op(ifp, SIOCDELMULTI, sin6tosa(&sin6));
*errorp = if_mcast_op(ifp, SIOCADDMULTI, sin6tosa(&sin6));
if_mcast_op(in6m->in6m_ifp, SIOCDELMULTI, sin6tosa(&sin6));