Function if_allmulti

freebsd/net/if.c:3303–3308

* Just like ifpromisc(), but for all-multicast-reception mode. */

 * Just like ifpromisc(), but for all-multicast-reception mode.
 */
int
if_allmulti(struct ifnet *ifp, int onswitch)
{

	return (if_setflag(ifp, IFF_ALLMULTI, 0, &ifp->if_amcount, onswitch));
}

struct ifmultiaddr *
if_findmulti(struct ifnet *ifp, const struct sockaddr *sa)