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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 | |
18 | { | |
19 | struct list_head list; /* Internal use. */ | |
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 | ||
27 | /* Mask of things we will help (compared against server response) */ | |
28 | struct nf_conntrack_tuple tuple; | |
29 | struct nf_conntrack_tuple mask; | |
30 | ||
31 | /* Function to call when data passes; return verdict, or -1 to | |
32 | invalidate. */ | |
33 | int (*help)(struct sk_buff **pskb, | |
34 | unsigned int protoff, | |
35 | struct nf_conn *ct, | |
36 | enum ip_conntrack_info conntrackinfo); | |
c1d10adb | 37 | |
f09943fe PM |
38 | void (*destroy)(struct nf_conn *ct); |
39 | ||
c1d10adb | 40 | int (*to_nfattr)(struct sk_buff *skb, const struct nf_conn *ct); |
9fb9cbb1 YK |
41 | }; |
42 | ||
7e5d03bb MJ |
43 | extern struct nf_conntrack_helper * |
44 | __nf_ct_helper_find(const struct nf_conntrack_tuple *tuple); | |
45 | ||
46 | extern struct nf_conntrack_helper * | |
47 | nf_ct_helper_find_get( const struct nf_conntrack_tuple *tuple); | |
48 | ||
49 | extern struct nf_conntrack_helper * | |
50 | __nf_conntrack_helper_find_byname(const char *name); | |
51 | ||
52 | extern void nf_ct_helper_put(struct nf_conntrack_helper *helper); | |
9fb9cbb1 YK |
53 | extern int nf_conntrack_helper_register(struct nf_conntrack_helper *); |
54 | extern void nf_conntrack_helper_unregister(struct nf_conntrack_helper *); | |
55 | ||
ceceae1b YK |
56 | static inline struct nf_conn_help *nfct_help(const struct nf_conn *ct) |
57 | { | |
58 | return nf_ct_ext_find(ct, NF_CT_EXT_HELPER); | |
59 | } | |
9fb9cbb1 | 60 | #endif /*_NF_CONNTRACK_HELPER_H*/ |