1 #ifndef __NET_LWTUNNEL_H
2 #define __NET_LWTUNNEL_H 1
4 #include <linux/lwtunnel.h>
5 #include <linux/netdevice.h>
6 #include <linux/skbuff.h>
7 #include <linux/types.h>
10 #define LWTUNNEL_HASH_BITS 7
11 #define LWTUNNEL_HASH_SIZE (1 << LWTUNNEL_HASH_BITS)
13 /* lw tunnel state flags */
14 #define LWTUNNEL_STATE_OUTPUT_REDIRECT BIT(0)
15 #define LWTUNNEL_STATE_INPUT_REDIRECT BIT(1)
17 struct lwtunnel_state
{
21 int (*orig_output
)(struct sock
*sk
, struct sk_buff
*skb
);
22 int (*orig_input
)(struct sk_buff
*);
27 struct lwtunnel_encap_ops
{
28 int (*build_state
)(struct net_device
*dev
, struct nlattr
*encap
,
29 struct lwtunnel_state
**ts
);
30 int (*output
)(struct sock
*sk
, struct sk_buff
*skb
);
31 int (*input
)(struct sk_buff
*skb
);
32 int (*fill_encap
)(struct sk_buff
*skb
,
33 struct lwtunnel_state
*lwtstate
);
34 int (*get_encap_size
)(struct lwtunnel_state
*lwtstate
);
35 int (*cmp_encap
)(struct lwtunnel_state
*a
, struct lwtunnel_state
*b
);
38 #ifdef CONFIG_LWTUNNEL
39 static inline void lwtstate_free(struct lwtunnel_state
*lws
)
44 static inline struct lwtunnel_state
*
45 lwtstate_get(struct lwtunnel_state
*lws
)
48 atomic_inc(&lws
->refcnt
);
53 static inline void lwtstate_put(struct lwtunnel_state
*lws
)
58 if (atomic_dec_and_test(&lws
->refcnt
))
62 static inline bool lwtunnel_output_redirect(struct lwtunnel_state
*lwtstate
)
64 if (lwtstate
&& (lwtstate
->flags
& LWTUNNEL_STATE_OUTPUT_REDIRECT
))
70 static inline bool lwtunnel_input_redirect(struct lwtunnel_state
*lwtstate
)
72 if (lwtstate
&& (lwtstate
->flags
& LWTUNNEL_STATE_INPUT_REDIRECT
))
77 int lwtunnel_encap_add_ops(const struct lwtunnel_encap_ops
*op
,
79 int lwtunnel_encap_del_ops(const struct lwtunnel_encap_ops
*op
,
81 int lwtunnel_build_state(struct net_device
*dev
, u16 encap_type
,
83 struct lwtunnel_state
**lws
);
84 int lwtunnel_fill_encap(struct sk_buff
*skb
,
85 struct lwtunnel_state
*lwtstate
);
86 int lwtunnel_get_encap_size(struct lwtunnel_state
*lwtstate
);
87 struct lwtunnel_state
*lwtunnel_state_alloc(int hdr_len
);
88 int lwtunnel_cmp_encap(struct lwtunnel_state
*a
, struct lwtunnel_state
*b
);
89 int lwtunnel_output(struct sock
*sk
, struct sk_buff
*skb
);
90 int lwtunnel_input(struct sk_buff
*skb
);
94 static inline void lwtstate_free(struct lwtunnel_state
*lws
)
98 static inline struct lwtunnel_state
*
99 lwtstate_get(struct lwtunnel_state
*lws
)
104 static inline void lwtstate_put(struct lwtunnel_state
*lws
)
108 static inline bool lwtunnel_output_redirect(struct lwtunnel_state
*lwtstate
)
113 static inline bool lwtunnel_input_redirect(struct lwtunnel_state
*lwtstate
)
118 static inline int lwtunnel_encap_add_ops(const struct lwtunnel_encap_ops
*op
,
125 static inline int lwtunnel_encap_del_ops(const struct lwtunnel_encap_ops
*op
,
131 static inline int lwtunnel_build_state(struct net_device
*dev
, u16 encap_type
,
132 struct nlattr
*encap
,
133 struct lwtunnel_state
**lws
)
138 static inline int lwtunnel_fill_encap(struct sk_buff
*skb
,
139 struct lwtunnel_state
*lwtstate
)
144 static inline int lwtunnel_get_encap_size(struct lwtunnel_state
*lwtstate
)
149 static inline struct lwtunnel_state
*lwtunnel_state_alloc(int hdr_len
)
154 static inline int lwtunnel_cmp_encap(struct lwtunnel_state
*a
,
155 struct lwtunnel_state
*b
)
160 static inline int lwtunnel_output(struct sock
*sk
, struct sk_buff
*skb
)
165 static inline int lwtunnel_input(struct sk_buff
*skb
)
172 #endif /* __NET_LWTUNNEL_H */