| #ifndef _NET_IP6_TUNNEL_H | 
 | #define _NET_IP6_TUNNEL_H | 
 |  | 
 | #include <linux/ipv6.h> | 
 | #include <linux/netdevice.h> | 
 | #include <linux/ip6_tunnel.h> | 
 |  | 
 | /* capable of sending packets */ | 
 | #define IP6_TNL_F_CAP_XMIT 0x10000 | 
 | /* capable of receiving packets */ | 
 | #define IP6_TNL_F_CAP_RCV 0x20000 | 
 |  | 
 | /* IPv6 tunnel */ | 
 |  | 
 | struct ip6_tnl { | 
 | 	struct ip6_tnl __rcu *next;	/* next tunnel in list */ | 
 | 	struct net_device *dev;	/* virtual device associated with tunnel */ | 
 | 	struct ip6_tnl_parm parms;	/* tunnel configuration parameters */ | 
 | 	struct flowi fl;	/* flowi template for xmit */ | 
 | 	struct dst_entry *dst_cache;    /* cached dst */ | 
 | 	u32 dst_cookie; | 
 | }; | 
 |  | 
 | /* Tunnel encapsulation limit destination sub-option */ | 
 |  | 
 | struct ipv6_tlv_tnl_enc_lim { | 
 | 	__u8 type;		/* type-code for option         */ | 
 | 	__u8 length;		/* option length                */ | 
 | 	__u8 encap_limit;	/* tunnel encapsulation limit   */ | 
 | } __packed; | 
 |  | 
 | #endif |