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- /*
- * connection tracking helpers.
- *
- * 16 Dec 2003: Yasuyuki Kozakai @USAGI <yasuyuki.kozakai@toshiba.co.jp>
- * - generalize L3 protocol dependent part.
- *
- * Derived from include/linux/netfiter_ipv4/ip_conntrack_helper.h
- */
- #ifndef _NF_CONNTRACK_HELPER_H
- #define _NF_CONNTRACK_HELPER_H
- #include <net/netfilter/nf_conntrack.h>
- struct module;
- struct nf_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 nf_conntrack_tuple tuple;
- struct nf_conntrack_tuple mask;
-
- /* Function to call when data passes; return verdict, or -1 to
- invalidate. */
- int (*help)(struct sk_buff **pskb,
- unsigned int protoff,
- struct nf_conn *ct,
- enum ip_conntrack_info conntrackinfo);
- void (*destroy)(struct nf_conn *ct);
- int (*to_nfattr)(struct sk_buff *skb, const struct nf_conn *ct);
- };
- extern struct nf_conntrack_helper *
- __nf_ct_helper_find(const struct nf_conntrack_tuple *tuple);
- extern struct nf_conntrack_helper *
- nf_ct_helper_find_get( const struct nf_conntrack_tuple *tuple);
- extern struct nf_conntrack_helper *
- __nf_conntrack_helper_find_byname(const char *name);
- extern void nf_ct_helper_put(struct nf_conntrack_helper *helper);
- extern int nf_conntrack_helper_register(struct nf_conntrack_helper *);
- extern void nf_conntrack_helper_unregister(struct nf_conntrack_helper *);
- #endif /*_NF_CONNTRACK_HELPER_H*/
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