if_act_start
ret = if_act_start(iface);
int if_act_start(struct iface *);
ret = if_act_start(iface);
int if_act_start(struct iface *);
ret = if_act_start(iface);
int if_act_start(struct iface *);
ret = if_act_start(iface);
int if_act_start(struct iface *);