}
		if attrs.GID != nil {
			gid = *attrs.GID
		}
		inDev, outDev := "", ""
		if attrs.InDev != nil {
			ii, err := net.InterfaceByIndex(int(*attrs.InDev))
			if err == nil {
				inDev = ii.Name
			}
		}
		if attrs.OutDev != nil {
			ii, err := net.InterfaceByIndex(int(*attrs.OutDev))
			if err == nil {
				outDev = ii.Name
			}
		}
		iptablesTrace.WithLabels(
			"command", prefix,
			"uid", uid,

	}
	return ifat, err
}

// InterfaceByIndex returns the interface specified by index.
//
// On Solaris, it returns one of the logical network interfaces
// sharing the logical data link; for more precision use
// [InterfaceByName].
func InterfaceByIndex(index int) (*Interface, error) {
	if index <= 0 {

			}
		}
	}
	return ""
}

func TestInterfaces(t *testing.T) {
	ift, err := Interfaces()
	if err != nil {
		t.Fatal(err)
	}
	for _, ifi := range ift {
		ifxi, err := InterfaceByIndex(ifi.Index)
		if err != nil {
			t.Fatal(err)
		}
		switch runtime.GOOS {
		case "solaris", "illumos":
			if ifxi.Index != ifi.Index {
				t.Errorf("got %v; want %v", ifxi, ifi)
			}
		default:

		case syscall.RTM_NEWADDR:
			ifam := (*syscall.IfAddrmsg)(unsafe.Pointer(&m.Data[0]))
			if len(ift) != 0 || ifi.Index == int(ifam.Index) {
				if len(ift) != 0 {
					var err error
					ifi, err = interfaceByIndex(ift, int(ifam.Index))
					if err != nil {
						return nil, err
					}
				}
				attrs, err := syscall.ParseNetlinkRouteAttr(&m)
				if err != nil {