var err error
		res, err = f()
		return err
	})
	if err != nil {
		return res, fmt.Errorf("in network namespace %v: %v", ns, err)
	}

	return res, nil
}

func checkInterfacesForMatchingAddr(targetAddr net.IP) (match bool, err error) {
	var interfaces []net.Interface
	if interfaces, err = net.Interfaces(); err != nil {
		return false, fmt.Errorf("failed to get interfaces")
	}