#ifndef _IP6_TUNNEL_H#define _IP6_TUNNEL_H #include <linux/types.h> #define IPV6_TLV_TNL_ENCAP_LIMIT 4#define IPV6_DEFAULT_TNL_ENCAP_LIMIT 4 /* don't add encapsulation limit if one isn't present in inner packet */#define IP6_TNL_F_IGN_ENCAP_LIMIT 0x1/* copy the traffic class field from the inner packet */#define IP6_TNL_F_USE_ORIG_TCLASS 0x2/* copy the flowlabel from the inner packet */#define IP6_TNL_F_USE_ORIG_FLOWLABEL 0x4/* being used for Mobile IPv6 */#define IP6_TNL_F_MIP6_DEV 0x8/* copy DSCP from the outer packet */#define IP6_TNL_F_RCV_DSCP_COPY 0x10/* copy fwmark from inner packet */#define IP6_TNL_F_USE_ORIG_FWMARK 0x20 struct ip6_tnl_parm {	char name[IFNAMSIZ];	/* name of tunnel device */	int link;		/* ifindex of underlying L2 interface */	__u8 proto;		/* tunnel protocol */	__u8 encap_limit;	/* encapsulation limit for tunnel */	__u8 hop_limit;		/* hop limit for tunnel */	__be32 flowinfo;	/* traffic class and flowlabel for tunnel */	__u32 flags;		/* tunnel flags */	struct in6_addr laddr;	/* local tunnel end-point address */	struct in6_addr raddr;	/* remote tunnel end-point address */}; struct ip6_tnl_parm2 {	char name[IFNAMSIZ];	/* name of tunnel device */	int link;		/* ifindex of underlying L2 interface */	__u8 proto;		/* tunnel protocol */	__u8 encap_limit;	/* encapsulation limit for tunnel */	__u8 hop_limit;		/* hop limit for tunnel */	__be32 flowinfo;	/* traffic class and flowlabel for tunnel */	__u32 flags;		/* tunnel flags */	struct in6_addr laddr;	/* local tunnel end-point address */	struct in6_addr raddr;	/* remote tunnel end-point address */ 	__be16			i_flags;	__be16			o_flags;	__be32			i_key;	__be32			o_key;}; #endif