}
	if msg.Flags&FlagSubroute != 0 {
		if m.subroute == nil {
			return fmt.Errorf("internal error: subroute not defined on client")
		}
		hid := m.subroute.withHandler(msg.Handler)
		before := len(dst)
		dst = append(dst, hid[:]...)
		if debugPrint {
			fmt.Println("Added subroute", hid.String(), "to message", msg, "len", len(dst)-before)
		}
	}
	if msg.Flags&FlagCRCxxh3 != 0 {
		h := xxh3.Hash(dst)

	Iflag uint32
	Lflag uint32
	Oflag uint32
	Cc    [11]uint8
}

type Winsize struct {
	Row    uint16
	Col    uint16
	Xpixel uint16
	Ypixel uint16
}

type W_Mnth struct {
	Hid   [4]byte
	Size  int32
	Cur1  int32 //32bit pointer
	Cur2  int32 //^
	Devno uint32
	_     [4]byte
}

type W_Mntent struct {
	Fstype       uint32
	Mode         uint32
	Dev          uint32

	 NF_NAT_RANGE_PROTO_RANDOM | NF_NAT_RANGE_PERSISTENT |	\
	 NF_NAT_RANGE_PROTO_RANDOM_FULLY | NF_NAT_RANGE_PROTO_OFFSET | \
	 NF_NAT_RANGE_NETMAP)

// Copied from linux/hid.h.
// Keep in sync with the size of the referenced fields.
#define _HIDIOCGRAWNAME_LEN	128 // sizeof_field(struct hid_device, name)
#define _HIDIOCGRAWPHYS_LEN	64  // sizeof_field(struct hid_device, phys)