carp_iamatch
!carp_iamatch(ifp))
int carp_iamatch(struct ifnet *);
if (ifp->if_type == IFT_CARP && !carp_iamatch(ifp))
if (ifp->if_type == IFT_CARP && ifa && !carp_iamatch(ifp))
if (ifp->if_type == IFT_CARP && !carp_iamatch(ifp))
if (ifp->if_type == IFT_CARP && !carp_iamatch(ifp))