[net-next-2.6.git] / include / net / netfilter / nf_conntrack_expect.h

/*
 * 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
	/* 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*/
Commit	Line	Data
77ab9cff MJ	1	/*
	2	* connection tracking expectations.
	3	*/
	4
	5	#ifndef _NF_CONNTRACK_EXPECT_H
	6	#define _NF_CONNTRACK_EXPECT_H
	7	#include <net/netfilter/nf_conntrack.h>
	8
	9	extern struct list_head nf_conntrack_expect_list;
	10	extern kmem_cache_t *nf_conntrack_expect_cachep;
	11	extern struct file_operations exp_file_ops;
	12
	13	struct nf_conntrack_expect
	14	{
	15	/* Internal linked list (global expectation list) */
	16	struct list_head list;
	17
	18	/* We expect this tuple, with the following mask */
	19	struct nf_conntrack_tuple tuple, mask;
	20
	21	/* Function to call after setup and insertion */
	22	void (expectfn)(struct nf_conn new,
	23	struct nf_conntrack_expect *this);
	24
9457d851 PM	25	/* Helper to assign to new connection */
	26	struct nf_conntrack_helper *helper;
	27
77ab9cff MJ	28	/* The conntrack of the master connection */
	29	struct nf_conn *master;
	30
	31	/* Timer function; deletes the expectation. */
	32	struct timer_list timeout;
	33
	34	/* Usage count. */
	35	atomic_t use;
	36
	37	/* Unique ID */
	38	unsigned int id;
	39
	40	/* Flags */
	41	unsigned int flags;
	42
	43	#ifdef CONFIG_NF_NAT_NEEDED
	44	/* This is the original per-proto part, used to map the
	45	* expected connection the way the recipient expects. */
5b1158e9	46	union nf_conntrack_man_proto saved_proto;
77ab9cff MJ	47	/* Direction relative to the master connection. */
	48	enum ip_conntrack_dir dir;
	49	#endif
	50	};
	51
	52	#define NF_CT_EXPECT_PERMANENT 0x1
	53
	54
	55	struct nf_conntrack_expect *
	56	__nf_conntrack_expect_find(const struct nf_conntrack_tuple *tuple);
	57
	58	struct nf_conntrack_expect *
468ec44b	59	nf_conntrack_expect_find_get(const struct nf_conntrack_tuple *tuple);
77ab9cff MJ	60
	61	struct nf_conntrack_expect *
	62	find_expectation(const struct nf_conntrack_tuple *tuple);
	63
	64	void nf_ct_unlink_expect(struct nf_conntrack_expect *exp);
	65	void nf_ct_remove_expectations(struct nf_conn *ct);
	66	void nf_conntrack_unexpect_related(struct nf_conntrack_expect *exp);
	67
	68	/* Allocate space for an expectation: this is mandatory before calling
	69	nf_conntrack_expect_related. You will have to call put afterwards. */
	70	struct nf_conntrack_expect nf_conntrack_expect_alloc(struct nf_conn me);
d6a9b650 PM	71	void nf_conntrack_expect_init(struct nf_conntrack_expect *, int,
	72	union nf_conntrack_address *,
	73	union nf_conntrack_address *,
	74	u_int8_t, __be16 , __be16 );
77ab9cff MJ	75	void nf_conntrack_expect_put(struct nf_conntrack_expect *exp);
	76	int nf_conntrack_expect_related(struct nf_conntrack_expect *expect);
	77
	78	#endif /_NF_CONNTRACK_EXPECT_H/
	79