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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _NF_CONNTRACK_TIMEOUT_H
#define _NF_CONNTRACK_TIMEOUT_H
#include <net/net_namespace.h>
#include <linux/netfilter/nf_conntrack_common.h>
#include <linux/netfilter/nf_conntrack_tuple_common.h>
#include <linux/refcount.h>
#include <net/netfilter/nf_conntrack.h>
#include <net/netfilter/nf_conntrack_extend.h>
#define CTNL_TIMEOUT_NAME_MAX 32
struct nf_ct_timeout {
__u16 l3num;
const struct nf_conntrack_l4proto *l4proto;
char data[0];
};
struct ctnl_timeout {
struct list_head head;
struct rcu_head rcu_head;
refcount_t refcnt;
char name[CTNL_TIMEOUT_NAME_MAX];
struct nf_ct_timeout timeout;
};
struct nf_conn_timeout {
struct nf_ct_timeout __rcu *timeout;
};
static inline unsigned int *
nf_ct_timeout_data(const struct nf_conn_timeout *t)
{
struct nf_ct_timeout *timeout;
timeout = rcu_dereference(t->timeout);
if (timeout == NULL)
return NULL;
return (unsigned int *)timeout->data;
}
static inline
struct nf_conn_timeout *nf_ct_timeout_find(const struct nf_conn *ct)
{
#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
return nf_ct_ext_find(ct, NF_CT_EXT_TIMEOUT);
#else
return NULL;
#endif
}
static inline
struct nf_conn_timeout *nf_ct_timeout_ext_add(struct nf_conn *ct,
struct nf_ct_timeout *timeout,
gfp_t gfp)
{
#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
struct nf_conn_timeout *timeout_ext;
timeout_ext = nf_ct_ext_add(ct, NF_CT_EXT_TIMEOUT, gfp);
if (timeout_ext == NULL)
return NULL;
rcu_assign_pointer(timeout_ext->timeout, timeout);
return timeout_ext;
#else
return NULL;
#endif
};
static inline unsigned int *nf_ct_timeout_lookup(const struct nf_conn *ct)
{
unsigned int *timeouts = NULL;
#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
struct nf_conn_timeout *timeout_ext;
timeout_ext = nf_ct_timeout_find(ct);
if (timeout_ext)
timeouts = nf_ct_timeout_data(timeout_ext);
#endif
return timeouts;
}
#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
int nf_conntrack_timeout_init(void);
void nf_conntrack_timeout_fini(void);
void nf_ct_untimeout(struct net *net, struct nf_ct_timeout *timeout);
int nf_ct_set_timeout(struct net *net, struct nf_conn *ct, u8 l3num, u8 l4num,
const char *timeout_name);
void nf_ct_destroy_timeout(struct nf_conn *ct);
#else
static inline int nf_conntrack_timeout_init(void)
{
return 0;
}
static inline void nf_conntrack_timeout_fini(void)
{
return;
}
static inline int nf_ct_set_timeout(struct net *net, struct nf_conn *ct,
u8 l3num, u8 l4num,
const char *timeout_name)
{
return -EOPNOTSUPP;
}
static inline void nf_ct_destroy_timeout(struct nf_conn *ct)
{
return;
}
#endif /* CONFIG_NF_CONNTRACK_TIMEOUT */
#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
extern struct nf_ct_timeout *(*nf_ct_timeout_find_get_hook)(struct net *net, const char *name);
extern void (*nf_ct_timeout_put_hook)(struct nf_ct_timeout *timeout);
#endif
#endif /* _NF_CONNTRACK_TIMEOUT_H */
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