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#ifndef _IF_TUNNEL_H_
#define _IF_TUNNEL_H_

#define SIOCGETTUNNEL   (SIOCDEVPRIVATE + 0)
#define SIOCADDTUNNEL   (SIOCDEVPRIVATE + 1)
#define SIOCDELTUNNEL   (SIOCDEVPRIVATE + 2)
#define SIOCCHGTUNNEL   (SIOCDEVPRIVATE + 3)

#define GRE_CSUM        __constant_htons(0x8000)
#define GRE_ROUTING     __constant_htons(0x4000)
#define GRE_KEY         __constant_htons(0x2000)
#define GRE_SEQ         __constant_htons(0x1000)
#define GRE_STRICT      __constant_htons(0x0800)
#define GRE_REC         __constant_htons(0x0700)
#define GRE_FLAGS       __constant_htons(0x00F8)
#define GRE_VERSION     __constant_htons(0x0007)

struct ip_tunnel_parm
{
        char                    name[IFNAMSIZ];
        int                     link;
        __u16                   i_flags;
        __u16                   o_flags;
        __u32                   i_key;
        __u32                   o_key;
        struct iphdr            iph;
};

#endif /* _IF_TUNNEL_H_ */