}
	f, err = l.file()
	if err != nil {
		err = &OpError{Op: "file", Net: l.fd.net, Source: nil, Addr: l.fd.laddr, Err: err}
	}
	return
}

// ListenUnix acts like [Listen] for Unix networks.
//
// The network must be "unix" or "unixpacket".
func ListenUnix(network string, laddr *UnixAddr) (*UnixListener, error) {
	switch network {
	case "unix", "unixpacket":
	default:

	for _, laddr := range []string{"", testUnixAddr(t)} {
		laddr := laddr
		taddr := testUnixAddr(t)
		ta, err := ResolveUnixAddr("unix", taddr)
		if err != nil {
			t.Fatal(err)
		}
		ln, err := ListenUnix("unix", ta)
		if err != nil {
			t.Fatal(err)
		}
		ls := (&streamListener{Listener: ln}).newLocalServer()
		defer ls.teardown()
		if err := ls.buildup(handler); err != nil {
			t.Fatal(err)
		}

	if err := os.Remove(addr); err != nil && !os.IsNotExist(err) {
		// Anything other than "file not found" is an error.
		return nil, fmt.Errorf("failed to remove unix://%s: %w", addr, err)
	}

	l, err := net.ListenUnix("unixpacket", resolvedAddr)
	if err != nil {
		return nil, fmt.Errorf("failed to listen unix: %w", err)
	}

	return &ztunnelServer{
		listener: l,
		conns: &connMgr{

		case "udp":
			_, err = ListenUDP(network, &UDPAddr{Port: 1 << 16})
		case "ip:4294967296":
			_, err = ListenIP(network, nil)
		case "unix", "unixpacket":
			_, err = ListenUnix(network, &UnixAddr{Name: "//"})
		case "unixgram":
			_, err = ListenUnixgram(network, &UnixAddr{Name: "//"})
		}
		if err == nil {
			t.Errorf("%s: should fail", network)
			continue
		}

	switch la := la.(type) {
	case *TCPAddr:
		if sl.MultipathTCP() {
			l, err = sl.listenMPTCP(ctx, la)
		} else {
			l, err = sl.listenTCP(ctx, la)
		}
	case *UnixAddr:
		l, err = sl.listenUnix(ctx, la)
	default:
		return nil, &OpError{Op: "listen", Net: sl.network, Source: nil, Addr: la, Err: &AddrError{Err: "unexpected address type", Addr: address}}
	}
	if err != nil {

	var runLock *net.UnixListener
	// Grab the abstract @xtables socket, will retry if the socket exists
	err := wait.PollImmediate(time.Second, wait.ForeverTestTimeout, func() (done bool, err error) {
		runLock, err = net.ListenUnix("unix", &net.UnixAddr{Name: lockPath14x, Net: "unix"})
		if err != nil {
			t.Logf("Failed to lock %s: %v, will retry.", lockPath14x, err)
			return false, nil
		}
		return true, nil
	})