2 * connection tracking expectations.
5 #ifndef _NF_CONNTRACK_EXPECT_H
6 #define _NF_CONNTRACK_EXPECT_H
8 #include <net/netfilter/nf_conntrack.h>
9 #include <net/netfilter/nf_conntrack_zones.h>
11 extern unsigned int nf_ct_expect_hsize;
12 extern unsigned int nf_ct_expect_max;
13 extern struct hlist_head *nf_ct_expect_hash;
15 struct nf_conntrack_expect {
16 /* Conntrack expectation list member */
17 struct hlist_node lnode;
20 struct hlist_node hnode;
22 /* We expect this tuple, with the following mask */
23 struct nf_conntrack_tuple tuple;
24 struct nf_conntrack_tuple_mask mask;
26 /* Function to call after setup and insertion */
27 void (*expectfn)(struct nf_conn *new,
28 struct nf_conntrack_expect *this);
30 /* Helper to assign to new connection */
31 struct nf_conntrack_helper *helper;
33 /* The conntrack of the master connection */
34 struct nf_conn *master;
36 /* Timer function; deletes the expectation. */
37 struct timer_list timeout;
45 /* Expectation class */
48 #ifdef CONFIG_NF_NAT_NEEDED
49 union nf_inet_addr saved_addr;
50 /* This is the original per-proto part, used to map the
51 * expected connection the way the recipient expects. */
52 union nf_conntrack_man_proto saved_proto;
53 /* Direction relative to the master connection. */
54 enum ip_conntrack_dir dir;
60 static inline struct net *nf_ct_exp_net(struct nf_conntrack_expect *exp)
62 return nf_ct_net(exp->master);
65 #define NF_CT_EXP_POLICY_NAME_LEN 16
67 struct nf_conntrack_expect_policy {
68 unsigned int max_expected;
70 char name[NF_CT_EXP_POLICY_NAME_LEN];
73 #define NF_CT_EXPECT_CLASS_DEFAULT 0
75 int nf_conntrack_expect_pernet_init(struct net *net);
76 void nf_conntrack_expect_pernet_fini(struct net *net);
78 int nf_conntrack_expect_init(void);
79 void nf_conntrack_expect_fini(void);
81 struct nf_conntrack_expect *
82 __nf_ct_expect_find(struct net *net,
83 const struct nf_conntrack_zone *zone,
84 const struct nf_conntrack_tuple *tuple);
86 struct nf_conntrack_expect *
87 nf_ct_expect_find_get(struct net *net,
88 const struct nf_conntrack_zone *zone,
89 const struct nf_conntrack_tuple *tuple);
91 struct nf_conntrack_expect *
92 nf_ct_find_expectation(struct net *net,
93 const struct nf_conntrack_zone *zone,
94 const struct nf_conntrack_tuple *tuple);
96 void nf_ct_unlink_expect_report(struct nf_conntrack_expect *exp,
97 u32 portid, int report);
98 static inline void nf_ct_unlink_expect(struct nf_conntrack_expect *exp)
100 nf_ct_unlink_expect_report(exp, 0, 0);
103 void nf_ct_remove_expectations(struct nf_conn *ct);
104 void nf_ct_unexpect_related(struct nf_conntrack_expect *exp);
106 /* Allocate space for an expectation: this is mandatory before calling
107 nf_ct_expect_related. You will have to call put afterwards. */
108 struct nf_conntrack_expect *nf_ct_expect_alloc(struct nf_conn *me);
109 void nf_ct_expect_init(struct nf_conntrack_expect *, unsigned int, u_int8_t,
110 const union nf_inet_addr *,
111 const union nf_inet_addr *,
112 u_int8_t, const __be16 *, const __be16 *);
113 void nf_ct_expect_put(struct nf_conntrack_expect *exp);
114 int nf_ct_expect_related_report(struct nf_conntrack_expect *expect,
115 u32 portid, int report);
116 static inline int nf_ct_expect_related(struct nf_conntrack_expect *expect)
118 return nf_ct_expect_related_report(expect, 0, 0);
121 #endif /*_NF_CONNTRACK_EXPECT_H*/