static unsigned short bpf_tunnel_key_af(u64 flags)
{
	return flags & BPF_F_TUNINFO_IPV6 ? AF_INET6 : AF_INET;
}
static unsigned short bpf_tunnel_key_af(u64 flags)
{
	return flags & BPF_F_TUNINFO_IPV6 ? AF_INET6 : AF_INET;
}