#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