1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
42 lines
1.4 KiB
C
42 lines
1.4 KiB
C
/* IP connection tracking helpers. */
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#ifndef _IP_CONNTRACK_HELPER_H
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#define _IP_CONNTRACK_HELPER_H
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#include <linux/netfilter_ipv4/ip_conntrack.h>
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struct module;
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struct ip_conntrack_helper
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{
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struct list_head list; /* Internal use. */
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const char *name; /* name of the module */
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struct module *me; /* pointer to self */
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unsigned int max_expected; /* Maximum number of concurrent
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* expected connections */
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unsigned int timeout; /* timeout for expecteds */
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/* Mask of things we will help (compared against server response) */
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struct ip_conntrack_tuple tuple;
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struct ip_conntrack_tuple mask;
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/* Function to call when data passes; return verdict, or -1 to
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invalidate. */
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int (*help)(struct sk_buff **pskb,
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struct ip_conntrack *ct,
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enum ip_conntrack_info conntrackinfo);
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};
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extern int ip_conntrack_helper_register(struct ip_conntrack_helper *);
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extern void ip_conntrack_helper_unregister(struct ip_conntrack_helper *);
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/* Allocate space for an expectation: this is mandatory before calling
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ip_conntrack_expect_related. */
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extern struct ip_conntrack_expect *ip_conntrack_expect_alloc(void);
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extern void ip_conntrack_expect_free(struct ip_conntrack_expect *exp);
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/* Add an expected connection: can have more than one per connection */
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extern int ip_conntrack_expect_related(struct ip_conntrack_expect *exp);
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extern void ip_conntrack_unexpect_related(struct ip_conntrack_expect *exp);
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#endif /*_IP_CONNTRACK_HELPER_H*/
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