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_output6(struct sock *sk, struct sk_buff *skb);
91 int lwtunnel_input(struct sk_buff *skb);
92 int lwtunnel_input6(struct sk_buff *skb);
96 static inline void lwtstate_free(struct lwtunnel_state *lws)
100 static inline struct lwtunnel_state *
101 lwtstate_get(struct lwtunnel_state *lws)
106 static inline void lwtstate_put(struct lwtunnel_state *lws)
110 static inline bool lwtunnel_output_redirect(struct lwtunnel_state *lwtstate)
115 static inline bool lwtunnel_input_redirect(struct lwtunnel_state *lwtstate)
120 static inline int lwtunnel_encap_add_ops(const struct lwtunnel_encap_ops *op,
127 static inline int lwtunnel_encap_del_ops(const struct lwtunnel_encap_ops *op,
133 static inline int lwtunnel_build_state(struct net_device *dev, u16 encap_type,
134 struct nlattr *encap,
135 struct lwtunnel_state **lws)
140 static inline int lwtunnel_fill_encap(struct sk_buff *skb,
141 struct lwtunnel_state *lwtstate)
146 static inline int lwtunnel_get_encap_size(struct lwtunnel_state *lwtstate)
151 static inline struct lwtunnel_state *lwtunnel_state_alloc(int hdr_len)
156 static inline int lwtunnel_cmp_encap(struct lwtunnel_state *a,
157 struct lwtunnel_state *b)
162 static inline int lwtunnel_output(struct sock *sk, struct sk_buff *skb)
167 static inline int lwtunnel_output6(struct sock *sk, struct sk_buff *skb)
172 static inline int lwtunnel_input(struct sk_buff *skb)
177 static inline int lwtunnel_input6(struct sk_buff *skb)
184 #endif /* __NET_LWTUNNEL_H */