swh:1:snp:32555a3fd8878f019c2ebd6c964bc1edcaeff337
Tip revision: e26081808edadfd257c6c9d81014e3b25e9a6118 authored by Linus Torvalds on 18 May 2015, 17:13:47 UTC
Linux 4.1-rc4
Linux 4.1-rc4
Tip revision: e260818
nf_conntrack_core.h
/*
* 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_l3proto.h>
#include <net/netfilter/nf_conntrack_l4proto.h>
#include <net/netfilter/nf_conntrack_ecache.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 net *net, u_int8_t pf, unsigned int hooknum,
struct sk_buff *skb);
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);
int nf_conntrack_proto_pernet_init(struct net *net);
void nf_conntrack_proto_pernet_fini(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_get_tuple(const struct sk_buff *skb, unsigned int nhoff,
unsigned int dataoff, u_int16_t l3num, u_int8_t protonum,
struct nf_conntrack_tuple *tuple,
const struct nf_conntrack_l3proto *l3proto,
const struct nf_conntrack_l4proto *l4proto);
bool nf_ct_invert_tuple(struct nf_conntrack_tuple *inverse,
const struct nf_conntrack_tuple *orig,
const struct nf_conntrack_l3proto *l3proto,
const struct nf_conntrack_l4proto *l4proto);
/* Find a connection corresponding to a tuple. */
struct nf_conntrack_tuple_hash *
nf_conntrack_find_get(struct net *net, u16 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;
int ret = NF_ACCEPT;
if (ct && !nf_ct_is_untracked(ct)) {
if (!nf_ct_is_confirmed(ct))
ret = __nf_conntrack_confirm(skb);
if (likely(ret == NF_ACCEPT))
nf_ct_deliver_cached_events(ct);
}
return ret;
}
void
print_tuple(struct seq_file *s, const struct nf_conntrack_tuple *tuple,
const struct nf_conntrack_l3proto *l3proto,
const struct nf_conntrack_l4proto *proto);
#ifdef CONFIG_LOCKDEP
# define CONNTRACK_LOCKS 8
#else
# define CONNTRACK_LOCKS 1024
#endif
extern spinlock_t nf_conntrack_locks[CONNTRACK_LOCKS];
extern spinlock_t nf_conntrack_expect_lock;
#endif /* _NF_CONNTRACK_CORE_H */