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 unsigned int nf_ct_expect_hsize;
10 extern unsigned int nf_ct_expect_max;
12 struct nf_conntrack_expect {
13 /* Conntrack expectation list member */
14 struct hlist_node lnode;
17 struct hlist_node hnode;
19 /* We expect this tuple, with the following mask */
20 struct nf_conntrack_tuple tuple;
21 struct nf_conntrack_tuple_mask mask;
23 /* Function to call after setup and insertion */
24 void (*expectfn)(struct nf_conn *new,
25 struct nf_conntrack_expect *this);
27 /* Helper to assign to new connection */
28 struct nf_conntrack_helper *helper;
30 /* The conntrack of the master connection */
31 struct nf_conn *master;
33 /* Timer function; deletes the expectation. */
34 struct timer_list timeout;
42 /* Expectation class */
45 #ifdef CONFIG_NF_NAT_NEEDED
47 /* This is the original per-proto part, used to map the
48 * expected connection the way the recipient expects. */
49 union nf_conntrack_man_proto saved_proto;
50 /* Direction relative to the master connection. */
51 enum ip_conntrack_dir dir;
57 static inline struct net *nf_ct_exp_net(struct nf_conntrack_expect *exp)
59 return nf_ct_net(exp->master);
62 struct nf_conntrack_expect_policy {
63 unsigned int max_expected;
68 #define NF_CT_EXPECT_CLASS_DEFAULT 0
70 #define NF_CT_EXPECT_PERMANENT 0x1
71 #define NF_CT_EXPECT_INACTIVE 0x2
73 int nf_conntrack_expect_init(struct net *net);
74 void nf_conntrack_expect_fini(struct net *net);
76 struct nf_conntrack_expect *
77 __nf_ct_expect_find(struct net *net, u16 zone,
78 const struct nf_conntrack_tuple *tuple);
80 struct nf_conntrack_expect *
81 nf_ct_expect_find_get(struct net *net, u16 zone,
82 const struct nf_conntrack_tuple *tuple);
84 struct nf_conntrack_expect *
85 nf_ct_find_expectation(struct net *net, u16 zone,
86 const struct nf_conntrack_tuple *tuple);
88 void nf_ct_unlink_expect(struct nf_conntrack_expect *exp);
89 void nf_ct_remove_expectations(struct nf_conn *ct);
90 void nf_ct_unexpect_related(struct nf_conntrack_expect *exp);
92 /* Allocate space for an expectation: this is mandatory before calling
93 nf_ct_expect_related. You will have to call put afterwards. */
94 struct nf_conntrack_expect *nf_ct_expect_alloc(struct nf_conn *me);
95 void nf_ct_expect_init(struct nf_conntrack_expect *, unsigned int, u_int8_t,
96 const union nf_inet_addr *,
97 const union nf_inet_addr *,
98 u_int8_t, const __be16 *, const __be16 *);
99 void nf_ct_expect_put(struct nf_conntrack_expect *exp);
100 int nf_ct_expect_related_report(struct nf_conntrack_expect *expect,
101 u32 pid, int report);
102 static inline int nf_ct_expect_related(struct nf_conntrack_expect *expect)
104 return nf_ct_expect_related_report(expect, 0, 0);
107 #endif /*_NF_CONNTRACK_EXPECT_H*/