if_set_mcast
int if_set_mcast(struct iface *);
if (if_set_mcast(iface) == -1) {
int if_set_mcast(struct iface *);
if (if_set_mcast(iface) == -1) {
int if_set_mcast(struct iface *);
if (if_set_mcast(iface) == -1)
if (if_set_mcast(iface) == -1) {
int if_set_mcast(struct iface *);