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/*
* connection tracking expectations.
*/
#ifndef _NF_CONNTRACK_EXPECT_H
#define _NF_CONNTRACK_EXPECT_H
#include <net/netfilter/nf_conntrack.h>
extern struct list_head nf_conntrack_expect_list;
extern kmem_cache_t *nf_conntrack_expect_cachep;
extern struct file_operations exp_file_ops;
struct nf_conntrack_expect
{
/* Internal linked list (global expectation list) */
struct list_head list;
/* We expect this tuple, with the following mask */
struct nf_conntrack_tuple tuple, mask;
/* Function to call after setup and insertion */
void (*expectfn)(struct nf_conn *new,
struct nf_conntrack_expect *this);
/* Helper to assign to new connection */
struct nf_conntrack_helper *helper;
/* The conntrack of the master connection */
struct nf_conn *master;
/* Timer function; deletes the expectation. */
struct timer_list timeout;
/* Usage count. */
atomic_t use;
/* Unique ID */
unsigned int id;
/* Flags */
unsigned int flags;
#ifdef CONFIG_NF_NAT_NEEDED
__be32 saved_ip;
/* This is the original per-proto part, used to map the
* expected connection the way the recipient expects. */
union nf_conntrack_man_proto saved_proto;
/* Direction relative to the master connection. */
enum ip_conntrack_dir dir;
#endif
};
#define NF_CT_EXPECT_PERMANENT 0x1
struct nf_conntrack_expect *
__nf_conntrack_expect_find(const struct nf_conntrack_tuple *tuple);
struct nf_conntrack_expect *
nf_conntrack_expect_find_get(const struct nf_conntrack_tuple *tuple);
struct nf_conntrack_expect *
find_expectation(const struct nf_conntrack_tuple *tuple);
void nf_ct_unlink_expect(struct nf_conntrack_expect *exp);
void nf_ct_remove_expectations(struct nf_conn *ct);
void nf_conntrack_unexpect_related(struct nf_conntrack_expect *exp);
/* Allocate space for an expectation: this is mandatory before calling
nf_conntrack_expect_related. You will have to call put afterwards. */
struct nf_conntrack_expect *nf_conntrack_expect_alloc(struct nf_conn *me);
void nf_conntrack_expect_init(struct nf_conntrack_expect *, int,
union nf_conntrack_address *,
union nf_conntrack_address *,
u_int8_t, __be16 *, __be16 *);
void nf_conntrack_expect_put(struct nf_conntrack_expect *exp);
int nf_conntrack_expect_related(struct nf_conntrack_expect *expect);
#endif /*_NF_CONNTRACK_EXPECT_H*/
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