ifam_index        413 net/if.h       	u_short	ifam_index;	/* index for associated ifp */
ifam_index        746 net/rtsock.c   			ifam->ifam_index = ifp->if_index;
ifam_index        901 net/rtsock.c   				ifam->ifam_index = ifa->ifa_ifp->if_index;