"Addr.IsValid",
		"Addr.IsUnspecified",
		"Addr.Less",
		"Addr.Unmap",
		"Addr.Zone",
		"Addr.v4",
		"Addr.v6",
		"Addr.v6u16",
		"Addr.withoutZone",
		"AddrPortFrom",
		"AddrPort.Addr",
		"AddrPort.Port",
		"AddrPort.IsValid",
		"Prefix.IsSingleIP",
		"Prefix.Masked",
		"Prefix.IsValid",
		"PrefixFrom",
		"Prefix.Addr",
		"Prefix.Bits",
		"AddrFrom4",
		"IPv6LinkLocalAllNodes",
		"IPv6Unspecified",

		}
	}
	if err != nil {
		// No sockaddr, so don't return UDPAddr.
		addr = nil
	}
	return n, addr, err
}

func (c *UDPConn) readFromAddrPort(b []byte) (n int, addr netip.AddrPort, err error) {
	var ip netip.Addr
	var port int
	switch c.fd.family {
	case syscall.AF_INET:
		var from syscall.SockaddrInet4
		n, err = c.fd.readFromInet4(b, &from)
		if err == nil {

		if err != nil {
			return nil, err
		}
		return &sa, nil
	}
	return nil, &AddrError{Err: "invalid address family", Addr: ip.String()}
}

func addrPortToSockaddrInet4(ap netip.AddrPort) (syscall.SockaddrInet4, error) {
	// ipToSockaddrInet4 has special handling here for zero length slices.
	// We do not, because netip has no concept of a generic zero IP address.
	addr := ap.Addr()
	if !addr.Is4() {