/* 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 {
|
/* Conntrack expectation list member */
|
struct hlist_node lnode;
|
|
/* Hash member */
|
struct hlist_node hnode;
|
|
/* We expect this tuple, with the following mask */
|
struct nf_conntrack_tuple tuple;
|
struct nf_conntrack_tuple_mask 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. */
|
refcount_t use;
|
|
/* Flags */
|
unsigned int flags;
|
|
/* Expectation class */
|
unsigned int class;
|
|
#if IS_ENABLED(CONFIG_NF_NAT)
|
union nf_inet_addr saved_addr;
|
/* 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
|
|
struct rcu_head rcu;
|
};
|
|
static inline struct net *nf_ct_exp_net(struct nf_conntrack_expect *exp)
|
{
|
return nf_ct_net(exp->master);
|
}
|
|
#define NF_CT_EXP_POLICY_NAME_LEN 16
|
|
struct nf_conntrack_expect_policy {
|
unsigned int max_expected;
|
unsigned int timeout;
|
char name[NF_CT_EXP_POLICY_NAME_LEN];
|
};
|
|
#define NF_CT_EXPECT_CLASS_DEFAULT 0
|
#define NF_CT_EXPECT_MAX_CNT 255
|
|
/* Allow to reuse expectations with the same tuples from different master
|
* conntracks.
|
*/
|
#define NF_CT_EXP_F_SKIP_MASTER 0x1
|
|
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);
|
|
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)
|
{
|
nf_ct_unlink_expect_report(exp, 0, 0);
|
}
|
|
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)
|
{
|
return nf_ct_expect_related_report(expect, 0, 0, flags);
|
}
|
|
#endif /*_NF_CONNTRACK_EXPECT_H*/
|
