rt_ifannouncemsg  280 net/if.c       	rt_ifannouncemsg(ifp, IFAN_ARRIVAL);
rt_ifannouncemsg  605 net/if.c       	rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
rt_ifannouncemsg  324 net/route.h    void	 rt_ifannouncemsg(struct ifnet *, int);