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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 */ | |
23 | unsigned int max_expected; /* Maximum number of concurrent | |
24 | * expected connections */ | |
25 | unsigned int timeout; /* timeout for expecteds */ | |
26 | ||
d4156e8c | 27 | /* Tuple of things we will help (compared against server response) */ |
9fb9cbb1 | 28 | struct nf_conntrack_tuple tuple; |
d4156e8c | 29 | |
9fb9cbb1 YK |
30 | /* Function to call when data passes; return verdict, or -1 to |
31 | invalidate. */ | |
32 | int (*help)(struct sk_buff **pskb, | |
33 | unsigned int protoff, | |
34 | struct nf_conn *ct, | |
35 | enum ip_conntrack_info conntrackinfo); | |
c1d10adb | 36 | |
f09943fe PM |
37 | void (*destroy)(struct nf_conn *ct); |
38 | ||
fdf70832 | 39 | int (*to_nlattr)(struct sk_buff *skb, const struct nf_conn *ct); |
9fb9cbb1 YK |
40 | }; |
41 | ||
7e5d03bb MJ |
42 | extern struct nf_conntrack_helper * |
43 | __nf_ct_helper_find(const struct nf_conntrack_tuple *tuple); | |
44 | ||
45 | extern struct nf_conntrack_helper * | |
46 | nf_ct_helper_find_get( const struct nf_conntrack_tuple *tuple); | |
47 | ||
48 | extern struct nf_conntrack_helper * | |
49 | __nf_conntrack_helper_find_byname(const char *name); | |
50 | ||
51 | extern void nf_ct_helper_put(struct nf_conntrack_helper *helper); | |
9fb9cbb1 YK |
52 | extern int nf_conntrack_helper_register(struct nf_conntrack_helper *); |
53 | extern void nf_conntrack_helper_unregister(struct nf_conntrack_helper *); | |
54 | ||
b560580a PM |
55 | extern struct nf_conn_help *nf_ct_helper_ext_add(struct nf_conn *ct, gfp_t gfp); |
56 | ||
ceceae1b YK |
57 | static inline struct nf_conn_help *nfct_help(const struct nf_conn *ct) |
58 | { | |
59 | return nf_ct_ext_find(ct, NF_CT_EXT_HELPER); | |
60 | } | |
9fb9cbb1 | 61 | #endif /*_NF_CONNTRACK_HELPER_H*/ |