2 * connection tracking expectations.
5 #ifndef _NF_CONNTRACK_EXPECT_H
6 #define _NF_CONNTRACK_EXPECT_H
7 #include <net/netfilter/nf_conntrack.h>
9 extern struct hlist_head
*nf_ct_expect_hash
;
10 extern unsigned int nf_ct_expect_hsize
;
11 extern unsigned int nf_ct_expect_max
;
13 struct nf_conntrack_expect
15 /* Conntrack expectation list member */
16 struct hlist_node lnode
;
19 struct hlist_node hnode
;
21 /* We expect this tuple, with the following mask */
22 struct nf_conntrack_tuple tuple
;
23 struct nf_conntrack_tuple_mask mask
;
25 /* Function to call after setup and insertion */
26 void (*expectfn
)(struct nf_conn
*new,
27 struct nf_conntrack_expect
*this);
29 /* Helper to assign to new connection */
30 struct nf_conntrack_helper
*helper
;
32 /* The conntrack of the master connection */
33 struct nf_conn
*master
;
35 /* Timer function; deletes the expectation. */
36 struct timer_list timeout
;
44 /* Expectation class */
47 #ifdef CONFIG_NF_NAT_NEEDED
49 /* This is the original per-proto part, used to map the
50 * expected connection the way the recipient expects. */
51 union nf_conntrack_man_proto saved_proto
;
52 /* Direction relative to the master connection. */
53 enum ip_conntrack_dir dir
;
59 struct nf_conntrack_expect_policy
61 unsigned int max_expected
;
65 #define NF_CT_EXPECT_CLASS_DEFAULT 0
67 #define NF_CT_EXPECT_PERMANENT 0x1
68 #define NF_CT_EXPECT_INACTIVE 0x2
70 int nf_conntrack_expect_init(void);
71 void nf_conntrack_expect_fini(void);
73 struct nf_conntrack_expect
*
74 __nf_ct_expect_find(const struct nf_conntrack_tuple
*tuple
);
76 struct nf_conntrack_expect
*
77 nf_ct_expect_find_get(const struct nf_conntrack_tuple
*tuple
);
79 struct nf_conntrack_expect
*
80 nf_ct_find_expectation(const struct nf_conntrack_tuple
*tuple
);
82 void nf_ct_unlink_expect(struct nf_conntrack_expect
*exp
);
83 void nf_ct_remove_expectations(struct nf_conn
*ct
);
84 void nf_ct_unexpect_related(struct nf_conntrack_expect
*exp
);
86 /* Allocate space for an expectation: this is mandatory before calling
87 nf_ct_expect_related. You will have to call put afterwards. */
88 struct nf_conntrack_expect
*nf_ct_expect_alloc(struct nf_conn
*me
);
89 void nf_ct_expect_init(struct nf_conntrack_expect
*, unsigned int, u_int8_t
,
90 const union nf_inet_addr
*,
91 const union nf_inet_addr
*,
92 u_int8_t
, const __be16
*, const __be16
*);
93 void nf_ct_expect_put(struct nf_conntrack_expect
*exp
);
94 int nf_ct_expect_related(struct nf_conntrack_expect
*expect
);
96 #endif /*_NF_CONNTRACK_EXPECT_H*/