]> pilppa.org Git - linux-2.6-omap-h63xx.git/blob - include/net/netfilter/nf_conntrack_expect.h
Merge branch 'task_killable' of git://git.kernel.org/pub/scm/linux/kernel/git/willy...
[linux-2.6-omap-h63xx.git] / include / net / netfilter / nf_conntrack_expect.h
1 /*
2  * connection tracking expectations.
3  */
4
5 #ifndef _NF_CONNTRACK_EXPECT_H
6 #define _NF_CONNTRACK_EXPECT_H
7 #include <net/netfilter/nf_conntrack.h>
8
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;
12
13 struct nf_conntrack_expect
14 {
15         /* Conntrack expectation list member */
16         struct hlist_node lnode;
17
18         /* Hash member */
19         struct hlist_node hnode;
20
21         /* We expect this tuple, with the following mask */
22         struct nf_conntrack_tuple tuple;
23         struct nf_conntrack_tuple_mask mask;
24
25         /* Function to call after setup and insertion */
26         void (*expectfn)(struct nf_conn *new,
27                          struct nf_conntrack_expect *this);
28
29         /* Helper to assign to new connection */
30         struct nf_conntrack_helper *helper;
31
32         /* The conntrack of the master connection */
33         struct nf_conn *master;
34
35         /* Timer function; deletes the expectation. */
36         struct timer_list timeout;
37
38         /* Usage count. */
39         atomic_t use;
40
41         /* Flags */
42         unsigned int flags;
43
44 #ifdef CONFIG_NF_NAT_NEEDED
45         __be32 saved_ip;
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;
51 #endif
52 };
53
54 #define NF_CT_EXPECT_PERMANENT 0x1
55
56 int nf_conntrack_expect_init(void);
57 void nf_conntrack_expect_fini(void);
58
59 struct nf_conntrack_expect *
60 __nf_ct_expect_find(const struct nf_conntrack_tuple *tuple);
61
62 struct nf_conntrack_expect *
63 nf_ct_expect_find_get(const struct nf_conntrack_tuple *tuple);
64
65 struct nf_conntrack_expect *
66 nf_ct_find_expectation(const struct nf_conntrack_tuple *tuple);
67
68 void nf_ct_unlink_expect(struct nf_conntrack_expect *exp);
69 void nf_ct_remove_expectations(struct nf_conn *ct);
70 void nf_ct_unexpect_related(struct nf_conntrack_expect *exp);
71
72 /* Allocate space for an expectation: this is mandatory before calling
73    nf_ct_expect_related.  You will have to call put afterwards. */
74 struct nf_conntrack_expect *nf_ct_expect_alloc(struct nf_conn *me);
75 void nf_ct_expect_init(struct nf_conntrack_expect *, int,
76                        union nf_inet_addr *,
77                        union nf_inet_addr *,
78                        u_int8_t, __be16 *, __be16 *);
79 void nf_ct_expect_put(struct nf_conntrack_expect *exp);
80 int nf_ct_expect_related(struct nf_conntrack_expect *expect);
81
82 #endif /*_NF_CONNTRACK_EXPECT_H*/
83