| /* IP connection tracking helpers. */ |
| #ifndef _IP_CONNTRACK_HELPER_H |
| #define _IP_CONNTRACK_HELPER_H |
| #include <linux/netfilter_ipv4/ip_conntrack.h> |
| |
| struct module; |
| |
| struct ip_conntrack_helper |
| { |
| struct list_head list; /* Internal use. */ |
| |
| const char *name; /* name of the module */ |
| struct module *me; /* pointer to self */ |
| unsigned int max_expected; /* Maximum number of concurrent |
| * expected connections */ |
| unsigned int timeout; /* timeout for expecteds */ |
| |
| /* Mask of things we will help (compared against server response) */ |
| struct ip_conntrack_tuple tuple; |
| struct ip_conntrack_tuple mask; |
| |
| /* Function to call when data passes; return verdict, or -1 to |
| invalidate. */ |
| int (*help)(struct sk_buff **pskb, |
| struct ip_conntrack *ct, |
| enum ip_conntrack_info conntrackinfo); |
| |
| void (*destroy)(struct ip_conntrack *ct); |
| |
| int (*to_nfattr)(struct sk_buff *skb, const struct ip_conntrack *ct); |
| }; |
| |
| extern int ip_conntrack_helper_register(struct ip_conntrack_helper *); |
| extern void ip_conntrack_helper_unregister(struct ip_conntrack_helper *); |
| |
| /* Allocate space for an expectation: this is mandatory before calling |
| ip_conntrack_expect_related. You will have to call put afterwards. */ |
| extern struct ip_conntrack_expect * |
| ip_conntrack_expect_alloc(struct ip_conntrack *master); |
| extern void ip_conntrack_expect_put(struct ip_conntrack_expect *exp); |
| |
| /* Add an expected connection: can have more than one per connection */ |
| extern int ip_conntrack_expect_related(struct ip_conntrack_expect *exp); |
| extern void ip_conntrack_unexpect_related(struct ip_conntrack_expect *exp); |
| |
| #endif /*_IP_CONNTRACK_HELPER_H*/ |