diff options
Diffstat (limited to 'kernel/include/net/netfilter/nf_conntrack_core.h')
-rw-r--r-- | kernel/include/net/netfilter/nf_conntrack_core.h | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/kernel/include/net/netfilter/nf_conntrack_core.h b/kernel/include/net/netfilter/nf_conntrack_core.h new file mode 100644 index 000000000..f2f0fa3bb --- /dev/null +++ b/kernel/include/net/netfilter/nf_conntrack_core.h @@ -0,0 +1,89 @@ +/* + * 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 */ |