Commit | Line | Data |
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9fb9cbb1 YK |
1 | /* |
2 | * connection tracking helpers. | |
3 | * | |
4 | * 16 Dec 2003: Yasuyuki Kozakai @USAGI <yasuyuki.kozakai@toshiba.co.jp> | |
5 | * - generalize L3 protocol dependent part. | |
6 | * | |
7 | * Derived from include/linux/netfiter_ipv4/ip_conntrack_helper.h | |
8 | */ | |
9 | ||
10 | #ifndef _NF_CONNTRACK_HELPER_H | |
11 | #define _NF_CONNTRACK_HELPER_H | |
12 | #include <net/netfilter/nf_conntrack.h> | |
ceceae1b | 13 | #include <net/netfilter/nf_conntrack_extend.h> |
9fb9cbb1 YK |
14 | |
15 | struct module; | |
16 | ||
af9d32ad HE |
17 | #define NF_CT_HELPER_NAME_LEN 16 |
18 | ||
fd2c3ef7 | 19 | struct nf_conntrack_helper { |
b8a7fe6c | 20 | struct hlist_node hnode; /* Internal use. */ |
9fb9cbb1 YK |
21 | |
22 | const char *name; /* name of the module */ | |
23 | struct module *me; /* pointer to self */ | |
6002f266 | 24 | const struct nf_conntrack_expect_policy *expect_policy; |
9fb9cbb1 | 25 | |
d4156e8c | 26 | /* Tuple of things we will help (compared against server response) */ |
9fb9cbb1 | 27 | struct nf_conntrack_tuple tuple; |
d4156e8c | 28 | |
9fb9cbb1 YK |
29 | /* Function to call when data passes; return verdict, or -1 to |
30 | invalidate. */ | |
3db05fea | 31 | int (*help)(struct sk_buff *skb, |
9fb9cbb1 YK |
32 | unsigned int protoff, |
33 | struct nf_conn *ct, | |
34 | enum ip_conntrack_info conntrackinfo); | |
c1d10adb | 35 | |
f09943fe PM |
36 | void (*destroy)(struct nf_conn *ct); |
37 | ||
fdf70832 | 38 | int (*to_nlattr)(struct sk_buff *skb, const struct nf_conn *ct); |
6002f266 | 39 | unsigned int expect_class_max; |
9fb9cbb1 YK |
40 | }; |
41 | ||
7e5d03bb | 42 | extern struct nf_conntrack_helper * |
794e6871 | 43 | __nf_conntrack_helper_find(const char *name, u16 l3num, u8 protonum); |
7e5d03bb | 44 | |
9fb9cbb1 YK |
45 | extern int nf_conntrack_helper_register(struct nf_conntrack_helper *); |
46 | extern void nf_conntrack_helper_unregister(struct nf_conntrack_helper *); | |
47 | ||
b560580a PM |
48 | extern struct nf_conn_help *nf_ct_helper_ext_add(struct nf_conn *ct, gfp_t gfp); |
49 | ||
b2a15a60 PM |
50 | extern int __nf_ct_try_assign_helper(struct nf_conn *ct, struct nf_conn *tmpl, |
51 | gfp_t flags); | |
226c0c0e | 52 | |
9858a3ae PNA |
53 | extern void nf_ct_helper_destroy(struct nf_conn *ct); |
54 | ||
ceceae1b YK |
55 | static inline struct nf_conn_help *nfct_help(const struct nf_conn *ct) |
56 | { | |
57 | return nf_ct_ext_find(ct, NF_CT_EXT_HELPER); | |
58 | } | |
b334aadc PM |
59 | |
60 | extern int nf_conntrack_helper_init(void); | |
61 | extern void nf_conntrack_helper_fini(void); | |
62 | ||
9fb9cbb1 | 63 | #endif /*_NF_CONNTRACK_HELPER_H*/ |