Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* IP connection tracking helpers. */ |
2 | #ifndef _IP_CONNTRACK_HELPER_H | |
3 | #define _IP_CONNTRACK_HELPER_H | |
4 | #include <linux/netfilter_ipv4/ip_conntrack.h> | |
5 | ||
6 | struct module; | |
7 | ||
8 | struct ip_conntrack_helper | |
9 | { | |
10 | struct list_head list; /* Internal use. */ | |
11 | ||
12 | const char *name; /* name of the module */ | |
13 | struct module *me; /* pointer to self */ | |
14 | unsigned int max_expected; /* Maximum number of concurrent | |
15 | * expected connections */ | |
16 | unsigned int timeout; /* timeout for expecteds */ | |
17 | ||
18 | /* Mask of things we will help (compared against server response) */ | |
19 | struct ip_conntrack_tuple tuple; | |
20 | struct ip_conntrack_tuple mask; | |
21 | ||
22 | /* Function to call when data passes; return verdict, or -1 to | |
23 | invalidate. */ | |
24 | int (*help)(struct sk_buff **pskb, | |
25 | struct ip_conntrack *ct, | |
26 | enum ip_conntrack_info conntrackinfo); | |
27 | }; | |
28 | ||
29 | extern int ip_conntrack_helper_register(struct ip_conntrack_helper *); | |
30 | extern void ip_conntrack_helper_unregister(struct ip_conntrack_helper *); | |
31 | ||
32 | /* Allocate space for an expectation: this is mandatory before calling | |
33 | ip_conntrack_expect_related. */ | |
34 | extern struct ip_conntrack_expect *ip_conntrack_expect_alloc(void); | |
35 | extern void ip_conntrack_expect_free(struct ip_conntrack_expect *exp); | |
36 | ||
37 | /* Add an expected connection: can have more than one per connection */ | |
38 | extern int ip_conntrack_expect_related(struct ip_conntrack_expect *exp); | |
39 | extern void ip_conntrack_unexpect_related(struct ip_conntrack_expect *exp); | |
40 | ||
41 | #endif /*_IP_CONNTRACK_HELPER_H*/ |