nf_conntrack_expect.h | Explore in Territory

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * connection tracking expectations.
 */

#ifndef _NF_CONNTRACK_EXPECT_H
#define _NF_CONNTRACK_EXPECT_H

#include <linux/refcount.h>

#include <net/netfilter/nf_conntrack.h>
#include <net/netfilter/nf_conntrack_zones.h>

extern unsigned int nf_ct_expect_hsize;
extern unsigned int nf_ct_expect_max;
extern struct hlist_head *nf_ct_expect_hash;

struct nf_conntrack_expect { … };

static inline struct net *nf_ct_exp_net(struct nf_conntrack_expect *exp)
{ … }

#define NF_CT_EXP_POLICY_NAME_LEN …

struct nf_conntrack_expect_policy { … };

#define NF_CT_EXPECT_CLASS_DEFAULT …
#define NF_CT_EXPECT_MAX_CNT …

/* Allow to reuse expectations with the same tuples from different master
 * conntracks.
 */
#define NF_CT_EXP_F_SKIP_MASTER …

int nf_conntrack_expect_pernet_init(struct net *net);
void nf_conntrack_expect_pernet_fini(struct net *net);

int nf_conntrack_expect_init(void);
void nf_conntrack_expect_fini(void);

struct nf_conntrack_expect *
__nf_ct_expect_find(struct net *net,
		    const struct nf_conntrack_zone *zone,
		    const struct nf_conntrack_tuple *tuple);

struct nf_conntrack_expect *
nf_ct_expect_find_get(struct net *net,
		      const struct nf_conntrack_zone *zone,
		      const struct nf_conntrack_tuple *tuple);

struct nf_conntrack_expect *
nf_ct_find_expectation(struct net *net,
		       const struct nf_conntrack_zone *zone,
		       const struct nf_conntrack_tuple *tuple, bool unlink);

void nf_ct_unlink_expect_report(struct nf_conntrack_expect *exp,
				u32 portid, int report);
static inline void nf_ct_unlink_expect(struct nf_conntrack_expect *exp)
{ … }

void nf_ct_remove_expectations(struct nf_conn *ct);
void nf_ct_unexpect_related(struct nf_conntrack_expect *exp);
bool nf_ct_remove_expect(struct nf_conntrack_expect *exp);

void nf_ct_expect_iterate_destroy(bool (*iter)(struct nf_conntrack_expect *e, void *data), void *data);
void nf_ct_expect_iterate_net(struct net *net,
			      bool (*iter)(struct nf_conntrack_expect *e, void *data),
                              void *data, u32 portid, int report);

/* Allocate space for an expectation: this is mandatory before calling
   nf_ct_expect_related.  You will have to call put afterwards. */
struct nf_conntrack_expect *nf_ct_expect_alloc(struct nf_conn *me);
void nf_ct_expect_init(struct nf_conntrack_expect *, unsigned int, u_int8_t,
		       const union nf_inet_addr *,
		       const union nf_inet_addr *,
		       u_int8_t, const __be16 *, const __be16 *);
void nf_ct_expect_put(struct nf_conntrack_expect *exp);
int nf_ct_expect_related_report(struct nf_conntrack_expect *expect,
				u32 portid, int report, unsigned int flags);
static inline int nf_ct_expect_related(struct nf_conntrack_expect *expect,
				       unsigned int flags)
{ … }

#endif /*_NF_CONNTRACK_EXPECT_H*/
linux/include/net/netfilter/nf_conntrack_expect.h
