s, err := unix.Socket(unix.AF_INET, unix.SOCK_DGRAM|unix.SOCK_NONBLOCK|unix.SOCK_CLOEXEC, unix.IPPROTO_ICMP)
if err != nil {
	return nil, os.NewSyscallError("socket", err)
}
if err := unix.SetsockoptInt(s, unix.IPPROTO_IP, unix.IP_RECVERR, 1); err != nil {
	unix.Close(s)
	return nil, os.NewSyscallError("setsockopt", err)
}
// TODO: this may be not supported
if err := unix.SetsockoptInt(s, unix.SOL_SOCKET, unix.SO_TIMESTAMPNS, 1); err != nil {
	unix.Close(s)
	return nil, os.NewSyscallError("setsockopt", err)
}
// TODO: unix.SOF_TIMESTAMPING_OPT_TSONLY
if err := unix.SetsockoptInt(s, unix.SOL_SOCKET, unix.SO_TIMESTAMPING,
	unix.SOF_TIMESTAMPING_RX_SOFTWARE|
	unix.SOF_TIMESTAMPING_TX_SOFTWARE|
	unix.SOF_TIMESTAMPING_OPT_CMSG|
	unix.SOF_TIMESTAMPING_OPT_ID|
	unix.SOF_TIMESTAMPING_TX_SCHED|
	unix.SOF_TIMESTAMPING_SOFTWARE); err != nil {
	unix.Close(s)
	return nil, os.NewSyscallError("setsockopt", err)
}
if err := unix.Bind(s, sockaddr(laddr)); err != nil {
	unix.Close(s)
	return nil, os.NewSyscallError("bind", err)
}
f := os.NewFile(uintptr(s), "datagram-oriented icmp")
c, err := net.FilePacketConn(f)
if cerr := f.Close(); cerr != nil {
	return nil, cerr
}
return c, err

c4 := ipv4.NewPacketConn(c)

n, err := p.c4.ReadBatch(ms, unix.MSG_ERRQUEUE|unix.MSG_DONTWAIT)