+enum ovs_tunnel_key_attr {
+ OVS_TUNNEL_KEY_ATTR_ID, /* be64 Tunnel ID */
+ OVS_TUNNEL_KEY_ATTR_IPV4_SRC, /* be32 src IP address. */
+ OVS_TUNNEL_KEY_ATTR_IPV4_DST, /* be32 dst IP address. */
+ OVS_TUNNEL_KEY_ATTR_TOS, /* u8 Tunnel IP ToS. */
+ OVS_TUNNEL_KEY_ATTR_TTL, /* u8 Tunnel IP TTL. */
+ OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT, /* No argument, set DF. */
+ OVS_TUNNEL_KEY_ATTR_CSUM, /* No argument. CSUM packet. */
+ __OVS_TUNNEL_KEY_ATTR_MAX
+};
+
+#define OVS_TUNNEL_KEY_ATTR_MAX (__OVS_TUNNEL_KEY_ATTR_MAX - 1)
+