]>
git.proxmox.com Git - mirror_ubuntu-zesty-kernel.git/blob - include/net/gre.h
4 #include <linux/skbuff.h>
5 #include <net/ip_tunnels.h>
7 #define GREPROTO_CISCO 0
8 #define GREPROTO_PPTP 1
10 #define GRE_IP_PROTO_MAX 2
13 int (*handler
)(struct sk_buff
*skb
);
14 void (*err_handler
)(struct sk_buff
*skb
, u32 info
);
21 #define GRE_HEADER_SECTION 4
23 int gre_add_protocol(const struct gre_protocol
*proto
, u8 version
);
24 int gre_del_protocol(const struct gre_protocol
*proto
, u8 version
);
26 struct gre_cisco_protocol
{
27 int (*handler
)(struct sk_buff
*skb
, const struct tnl_ptk_info
*tpi
);
28 int (*err_handler
)(struct sk_buff
*skb
, u32 info
,
29 const struct tnl_ptk_info
*tpi
);
33 int gre_cisco_register(struct gre_cisco_protocol
*proto
);
34 int gre_cisco_unregister(struct gre_cisco_protocol
*proto
);
36 int gre_offload_init(void);
37 void gre_offload_exit(void);
39 void gre_build_header(struct sk_buff
*skb
, const struct tnl_ptk_info
*tpi
,
42 static inline struct sk_buff
*gre_handle_offloads(struct sk_buff
*skb
,
45 return iptunnel_handle_offloads(skb
, gre_csum
, SKB_GSO_GRE
);
49 static inline int ip_gre_calc_hlen(__be16 o_flags
)
53 if (o_flags
&TUNNEL_CSUM
)
55 if (o_flags
&TUNNEL_KEY
)
57 if (o_flags
&TUNNEL_SEQ
)
62 static inline __be16
gre_flags_to_tnl_flags(__be16 flags
)
67 tflags
|= TUNNEL_CSUM
;
68 if (flags
& GRE_ROUTING
)
69 tflags
|= TUNNEL_ROUTING
;
74 if (flags
& GRE_STRICT
)
75 tflags
|= TUNNEL_STRICT
;
78 if (flags
& GRE_VERSION
)
79 tflags
|= TUNNEL_VERSION
;
84 static inline __be16
tnl_flags_to_gre_flags(__be16 tflags
)
88 if (tflags
& TUNNEL_CSUM
)
90 if (tflags
& TUNNEL_ROUTING
)
92 if (tflags
& TUNNEL_KEY
)
94 if (tflags
& TUNNEL_SEQ
)
96 if (tflags
& TUNNEL_STRICT
)
98 if (tflags
& TUNNEL_REC
)
100 if (tflags
& TUNNEL_VERSION
)
101 flags
|= GRE_VERSION
;