Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 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> |
| 13 | |
| 14 | struct module; |
| 15 | |
| 16 | struct nf_conntrack_helper |
| 17 | { |
| 18 | struct list_head list; /* Internal use. */ |
| 19 | |
| 20 | const char *name; /* name of the module */ |
| 21 | struct module *me; /* pointer to self */ |
| 22 | unsigned int max_expected; /* Maximum number of concurrent |
| 23 | * expected connections */ |
| 24 | unsigned int timeout; /* timeout for expecteds */ |
| 25 | |
| 26 | /* Mask of things we will help (compared against server response) */ |
| 27 | struct nf_conntrack_tuple tuple; |
| 28 | struct nf_conntrack_tuple mask; |
| 29 | |
| 30 | /* Function to call when data passes; return verdict, or -1 to |
| 31 | invalidate. */ |
| 32 | int (*help)(struct sk_buff **pskb, |
| 33 | unsigned int protoff, |
| 34 | struct nf_conn *ct, |
| 35 | enum ip_conntrack_info conntrackinfo); |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 36 | |
Patrick McHardy | f09943f | 2006-12-02 22:09:41 -0800 | [diff] [blame^] | 37 | void (*destroy)(struct nf_conn *ct); |
| 38 | |
Pablo Neira Ayuso | c1d10ad | 2006-01-05 12:19:05 -0800 | [diff] [blame] | 39 | int (*to_nfattr)(struct sk_buff *skb, const struct nf_conn *ct); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 40 | }; |
| 41 | |
Martin Josefsson | 7e5d03b | 2006-11-29 02:34:59 +0100 | [diff] [blame] | 42 | extern struct nf_conntrack_helper * |
| 43 | __nf_ct_helper_find(const struct nf_conntrack_tuple *tuple); |
| 44 | |
| 45 | extern struct nf_conntrack_helper * |
| 46 | nf_ct_helper_find_get( const struct nf_conntrack_tuple *tuple); |
| 47 | |
| 48 | extern struct nf_conntrack_helper * |
| 49 | __nf_conntrack_helper_find_byname(const char *name); |
| 50 | |
| 51 | extern void nf_ct_helper_put(struct nf_conntrack_helper *helper); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 52 | extern int nf_conntrack_helper_register(struct nf_conntrack_helper *); |
| 53 | extern void nf_conntrack_helper_unregister(struct nf_conntrack_helper *); |
| 54 | |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 55 | #endif /*_NF_CONNTRACK_HELPER_H*/ |