| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 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*/ |