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 #ifdef CONFIG_NF_NAT_NEEDED
46 /* This is the original per-proto part, used to map the
47 * expected connection the way the recipient expects. */
48 union nf_conntrack_man_proto saved_proto
;
49 /* Direction relative to the master connection. */
50 enum ip_conntrack_dir dir
;
56 #define NF_CT_EXPECT_PERMANENT 0x1
57 #define NF_CT_EXPECT_INACTIVE 0x2
59 int nf_conntrack_expect_init(void);
60 void nf_conntrack_expect_fini(void);
62 struct nf_conntrack_expect
*
63 __nf_ct_expect_find(const struct nf_conntrack_tuple
*tuple
);
65 struct nf_conntrack_expect
*
66 nf_ct_expect_find_get(const struct nf_conntrack_tuple
*tuple
);
68 struct nf_conntrack_expect
*
69 nf_ct_find_expectation(const struct nf_conntrack_tuple
*tuple
);
71 void nf_ct_unlink_expect(struct nf_conntrack_expect
*exp
);
72 void nf_ct_remove_expectations(struct nf_conn
*ct
);
73 void nf_ct_unexpect_related(struct nf_conntrack_expect
*exp
);
75 /* Allocate space for an expectation: this is mandatory before calling
76 nf_ct_expect_related. You will have to call put afterwards. */
77 struct nf_conntrack_expect
*nf_ct_expect_alloc(struct nf_conn
*me
);
78 void nf_ct_expect_init(struct nf_conntrack_expect
*, int,
79 const union nf_inet_addr
*,
80 const union nf_inet_addr
*,
81 u_int8_t
, const __be16
*, const __be16
*);
82 void nf_ct_expect_put(struct nf_conntrack_expect
*exp
);
83 int nf_ct_expect_related(struct nf_conntrack_expect
*expect
);
85 #endif /*_NF_CONNTRACK_EXPECT_H*/