104 lines
3.1 KiB
C
104 lines
3.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* This header is used to share core functionality between the
|
|
* standalone connection tracking module, and the compatibility layer's use
|
|
* of connection tracking.
|
|
*
|
|
* 16 Dec 2003: Yasuyuki Kozakai @USAGI <yasuyuki.kozakai@toshiba.co.jp>
|
|
* - generalize L3 protocol dependent part.
|
|
*
|
|
* Derived from include/linux/netfiter_ipv4/ip_conntrack_core.h
|
|
*/
|
|
|
|
#ifndef _NF_CONNTRACK_CORE_H
|
|
#define _NF_CONNTRACK_CORE_H
|
|
|
|
#include <linux/netfilter.h>
|
|
#include <net/netfilter/nf_conntrack.h>
|
|
#include <net/netfilter/nf_conntrack_ecache.h>
|
|
#include <net/netfilter/nf_conntrack_l4proto.h>
|
|
|
|
/* This header is used to share core functionality between the
|
|
standalone connection tracking module, and the compatibility layer's use
|
|
of connection tracking. */
|
|
|
|
unsigned int nf_conntrack_in(struct sk_buff *skb,
|
|
const struct nf_hook_state *state);
|
|
|
|
int nf_conntrack_init_net(struct net *net);
|
|
void nf_conntrack_cleanup_net(struct net *net);
|
|
void nf_conntrack_cleanup_net_list(struct list_head *net_exit_list);
|
|
|
|
void nf_conntrack_proto_pernet_init(struct net *net);
|
|
|
|
int nf_conntrack_proto_init(void);
|
|
void nf_conntrack_proto_fini(void);
|
|
|
|
int nf_conntrack_init_start(void);
|
|
void nf_conntrack_cleanup_start(void);
|
|
|
|
void nf_conntrack_init_end(void);
|
|
void nf_conntrack_cleanup_end(void);
|
|
|
|
bool nf_ct_invert_tuple(struct nf_conntrack_tuple *inverse,
|
|
const struct nf_conntrack_tuple *orig);
|
|
|
|
/* Find a connection corresponding to a tuple. */
|
|
struct nf_conntrack_tuple_hash *
|
|
nf_conntrack_find_get(struct net *net,
|
|
const struct nf_conntrack_zone *zone,
|
|
const struct nf_conntrack_tuple *tuple);
|
|
|
|
int __nf_conntrack_confirm(struct sk_buff *skb);
|
|
|
|
/* Confirm a connection: returns NF_DROP if packet must be dropped. */
|
|
static inline int nf_conntrack_confirm(struct sk_buff *skb)
|
|
{
|
|
struct nf_conn *ct = (struct nf_conn *)skb_nfct(skb);
|
|
int ret = NF_ACCEPT;
|
|
|
|
if (ct) {
|
|
if (!nf_ct_is_confirmed(ct)) {
|
|
ret = __nf_conntrack_confirm(skb);
|
|
|
|
if (ret == NF_ACCEPT)
|
|
ct = (struct nf_conn *)skb_nfct(skb);
|
|
}
|
|
|
|
if (ret == NF_ACCEPT && nf_ct_ecache_exist(ct))
|
|
nf_ct_deliver_cached_events(ct);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
unsigned int nf_confirm(void *priv, struct sk_buff *skb, const struct nf_hook_state *state);
|
|
|
|
void print_tuple(struct seq_file *s, const struct nf_conntrack_tuple *tuple,
|
|
const struct nf_conntrack_l4proto *proto);
|
|
|
|
#define CONNTRACK_LOCKS 1024
|
|
|
|
extern spinlock_t nf_conntrack_locks[CONNTRACK_LOCKS];
|
|
void nf_conntrack_lock(spinlock_t *lock);
|
|
|
|
extern spinlock_t nf_conntrack_expect_lock;
|
|
|
|
/* ctnetlink code shared by both ctnetlink and nf_conntrack_bpf */
|
|
|
|
static inline void __nf_ct_set_timeout(struct nf_conn *ct, u64 timeout)
|
|
{
|
|
if (timeout > INT_MAX)
|
|
timeout = INT_MAX;
|
|
|
|
if (nf_ct_is_confirmed(ct))
|
|
WRITE_ONCE(ct->timeout, nfct_time_stamp + (u32)timeout);
|
|
else
|
|
ct->timeout = (u32)timeout;
|
|
}
|
|
|
|
int __nf_ct_change_timeout(struct nf_conn *ct, u64 cta_timeout);
|
|
void __nf_ct_change_status(struct nf_conn *ct, unsigned long on, unsigned long off);
|
|
int nf_ct_change_status_common(struct nf_conn *ct, unsigned int status);
|
|
|
|
#endif /* _NF_CONNTRACK_CORE_H */
|