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 list_head nf_ct_expect_list;
10 extern struct kmem_cache *nf_ct_expect_cachep;
11 extern const struct file_operations exp_file_ops;
13 struct nf_conntrack_expect
15 /* Internal linked list (global expectation list) */
16 struct list_head list;
18 /* We expect this tuple, with the following mask */
19 struct nf_conntrack_tuple tuple;
20 struct nf_conntrack_tuple_mask mask;
22 /* Function to call after setup and insertion */
23 void (*expectfn)(struct nf_conn *new,
24 struct nf_conntrack_expect *this);
26 /* Helper to assign to new connection */
27 struct nf_conntrack_helper *helper;
29 /* The conntrack of the master connection */
30 struct nf_conn *master;
32 /* Timer function; deletes the expectation. */
33 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;
54 #define NF_CT_EXPECT_PERMANENT 0x1
57 struct nf_conntrack_expect *
58 __nf_ct_expect_find(const struct nf_conntrack_tuple *tuple);
60 struct nf_conntrack_expect *
61 nf_ct_expect_find_get(const struct nf_conntrack_tuple *tuple);
63 struct nf_conntrack_expect *
64 nf_ct_find_expectation(const struct nf_conntrack_tuple *tuple);
66 void nf_ct_unlink_expect(struct nf_conntrack_expect *exp);
67 void nf_ct_remove_expectations(struct nf_conn *ct);
68 void nf_ct_unexpect_related(struct nf_conntrack_expect *exp);
70 /* Allocate space for an expectation: this is mandatory before calling
71 nf_ct_expect_related. You will have to call put afterwards. */
72 struct nf_conntrack_expect *nf_ct_expect_alloc(struct nf_conn *me);
73 void nf_ct_expect_init(struct nf_conntrack_expect *, int,
74 union nf_conntrack_address *,
75 union nf_conntrack_address *,
76 u_int8_t, __be16 *, __be16 *);
77 void nf_ct_expect_put(struct nf_conntrack_expect *exp);
78 int nf_ct_expect_related(struct nf_conntrack_expect *expect);
80 #endif /*_NF_CONNTRACK_EXPECT_H*/