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>
8 struct ip_conntrack_helper
10 struct list_head list
; /* Internal use. */
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 */
18 /* Mask of things we will help (compared against server response) */
19 struct ip_conntrack_tuple tuple
;
20 struct ip_conntrack_tuple mask
;
22 /* Function to call when data passes; return verdict, or -1 to
24 int (*help
)(struct sk_buff
**pskb
,
25 struct ip_conntrack
*ct
,
26 enum ip_conntrack_info conntrackinfo
);
29 extern int ip_conntrack_helper_register(struct ip_conntrack_helper
*);
30 extern void ip_conntrack_helper_unregister(struct ip_conntrack_helper
*);
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
);
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
);
41 #endif /*_IP_CONNTRACK_HELPER_H*/