UDP_TUNNEL_GENEVE_4IN4
TUN_VNET_UDPTNL_VARIANT_ADD(UDP_TUNNEL_GENEVE_4IN4, 4in4);
#define UDP_TUNNEL_OUTER_IPV4 (UDP_TUNNEL_GENEVE_4IN4 | UDP_TUNNEL_GENEVE_6IN4)
#define UDP_TUNNEL_INNER_IPV4 (UDP_TUNNEL_GENEVE_4IN4 | UDP_TUNNEL_GENEVE_4IN6)
((type) == UDP_TUNNEL_GENEVE_4IN4 ? UDP_TUNNEL_GENEVE_4IN4_HDRLEN : \