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#ifndef _IF_TUNNEL_H_
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#define _IF_TUNNEL_H_
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#define SIOCGETTUNNEL   (SIOCDEVPRIVATE + 0)
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#define SIOCADDTUNNEL   (SIOCDEVPRIVATE + 1)
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#define SIOCDELTUNNEL   (SIOCDEVPRIVATE + 2)
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#define SIOCCHGTUNNEL   (SIOCDEVPRIVATE + 3)
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#define GRE_CSUM        __constant_htons(0x8000)
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#define GRE_ROUTING     __constant_htons(0x4000)
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#define GRE_KEY         __constant_htons(0x2000)
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#define GRE_SEQ         __constant_htons(0x1000)
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#define GRE_STRICT      __constant_htons(0x0800)
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#define GRE_REC         __constant_htons(0x0700)
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#define GRE_FLAGS       __constant_htons(0x00F8)
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#define GRE_VERSION     __constant_htons(0x0007)
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struct ip_tunnel_parm
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{
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        char                    name[IFNAMSIZ];
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        int                     link;
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        __u16                   i_flags;
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        __u16                   o_flags;
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        __u32                   i_key;
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        __u32                   o_key;
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        struct iphdr            iph;
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};
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#endif /* _IF_TUNNEL_H_ */