1 #ifndef _NF_CONNTRACK_EXTEND_H
2 #define _NF_CONNTRACK_EXTEND_H
4 #include <net/netfilter/nf_conntrack.h>
14 #define NF_CT_EXT_HELPER_TYPE struct nf_conn_help
15 #define NF_CT_EXT_NAT_TYPE struct nf_conn_nat
16 #define NF_CT_EXT_ACCT_TYPE struct nf_conn_counter
17 #define NF_CT_EXT_ECACHE_TYPE struct nf_conntrack_ecache
19 /* Extensions: optional stuff which isn't permanently in struct. */
22 u8 offset[NF_CT_EXT_NUM];
27 static inline int nf_ct_ext_exist(const struct nf_conn *ct, u8 id)
29 return (ct->ext && ct->ext->offset[id]);
32 static inline void *__nf_ct_ext_find(const struct nf_conn *ct, u8 id)
34 if (!nf_ct_ext_exist(ct, id))
37 return (void *)ct->ext + ct->ext->offset[id];
39 #define nf_ct_ext_find(ext, id) \
40 ((id##_TYPE *)__nf_ct_ext_find((ext), (id)))
42 /* Destroy all relationships */
43 extern void __nf_ct_ext_destroy(struct nf_conn *ct);
44 static inline void nf_ct_ext_destroy(struct nf_conn *ct)
47 __nf_ct_ext_destroy(ct);
50 /* Free operation. If you want to free a object referred from private area,
51 * please implement __nf_ct_ext_free() and call it.
53 static inline void nf_ct_ext_free(struct nf_conn *ct)
59 /* Add this type, returns pointer to data or NULL. */
61 __nf_ct_ext_add(struct nf_conn *ct, enum nf_ct_ext_id id, gfp_t gfp);
62 #define nf_ct_ext_add(ct, id, gfp) \
63 ((id##_TYPE *)__nf_ct_ext_add((ct), (id), (gfp)))
65 #define NF_CT_EXT_F_PREALLOC 0x0001
67 struct nf_ct_ext_type {
68 /* Destroys relationships (can be NULL). */
69 void (*destroy)(struct nf_conn *ct);
70 /* Called when realloacted (can be NULL).
71 Contents has already been moved. */
72 void (*move)(void *new, void *old);
78 /* Length and min alignment. */
81 /* initial size of nf_ct_ext. */
85 int nf_ct_extend_register(struct nf_ct_ext_type *type);
86 void nf_ct_extend_unregister(struct nf_ct_ext_type *type);
87 #endif /* _NF_CONNTRACK_EXTEND_H */