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 | ||
17 | struct nf_conntrack_helper | |
b8a7fe6c PM |
18 | { |
19 | struct hlist_node hnode; /* Internal use. */ | |
9fb9cbb1 YK |
20 | |
21 | const char *name; /* name of the module */ | |
22 | struct module *me; /* pointer to self */ | |
6002f266 | 23 | const struct nf_conntrack_expect_policy *expect_policy; |
9fb9cbb1 | 24 | |
d4156e8c | 25 | /* Tuple of things we will help (compared against server response) */ |
9fb9cbb1 | 26 | struct nf_conntrack_tuple tuple; |
d4156e8c | 27 | |
9fb9cbb1 YK |
28 | /* Function to call when data passes; return verdict, or -1 to |
29 | invalidate. */ | |
3db05fea | 30 | int (*help)(struct sk_buff *skb, |
9fb9cbb1 YK |
31 | unsigned int protoff, |
32 | struct nf_conn *ct, | |
33 | enum ip_conntrack_info conntrackinfo); | |
c1d10adb | 34 | |
f09943fe PM |
35 | void (*destroy)(struct nf_conn *ct); |
36 | ||
fdf70832 | 37 | int (*to_nlattr)(struct sk_buff *skb, const struct nf_conn *ct); |
6002f266 | 38 | unsigned int expect_class_max; |
9fb9cbb1 YK |
39 | }; |
40 | ||
7e5d03bb MJ |
41 | extern struct nf_conntrack_helper * |
42 | __nf_conntrack_helper_find_byname(const char *name); | |
43 | ||
9fb9cbb1 YK |
44 | extern int nf_conntrack_helper_register(struct nf_conntrack_helper *); |
45 | extern void nf_conntrack_helper_unregister(struct nf_conntrack_helper *); | |
46 | ||
b560580a PM |
47 | extern struct nf_conn_help *nf_ct_helper_ext_add(struct nf_conn *ct, gfp_t gfp); |
48 | ||
226c0c0e PNA |
49 | extern int __nf_ct_try_assign_helper(struct nf_conn *ct, gfp_t flags); |
50 | ||
ceceae1b YK |
51 | static inline struct nf_conn_help *nfct_help(const struct nf_conn *ct) |
52 | { | |
53 | return nf_ct_ext_find(ct, NF_CT_EXT_HELPER); | |
54 | } | |
b334aadc PM |
55 | |
56 | extern int nf_conntrack_helper_init(void); | |
57 | extern void nf_conntrack_helper_fini(void); | |
58 | ||
9fb9cbb1 | 59 | #endif /*_NF_CONNTRACK_HELPER_H*/ |