#include <linux/netfilter/nf_conntrack_common.h>
#ifdef __KERNEL__
-#include <linux/config.h>
#include <linux/bitops.h>
#include <linux/compiler.h>
#include <asm/atomic.h>
#include <linux/netfilter/nf_conntrack_tcp.h>
+#include <linux/netfilter/nf_conntrack_dccp.h>
#include <linux/netfilter/nf_conntrack_sctp.h>
+#include <linux/netfilter/nf_conntrack_proto_gre.h>
#include <net/netfilter/ipv4/nf_conntrack_icmp.h>
#include <net/netfilter/ipv6/nf_conntrack_icmpv6.h>
/* per conntrack: protocol private data */
union nf_conntrack_proto {
/* insert conntrack proto private data here */
+ struct nf_ct_dccp dccp;
struct ip_ct_sctp sctp;
struct ip_ct_tcp tcp;
struct ip_ct_icmp icmp;
struct nf_ct_icmpv6 icmpv6;
+ struct nf_ct_gre gre;
};
union nf_conntrack_expect_proto {
/* Add protocol helper include file here */
#include <linux/netfilter/nf_conntrack_ftp.h>
+#include <linux/netfilter/nf_conntrack_pptp.h>
+#include <linux/netfilter/nf_conntrack_h323.h>
+#include <linux/netfilter/nf_conntrack_sane.h>
+#include <linux/netfilter/nf_conntrack_sip.h>
/* per conntrack: application helper private data */
union nf_conntrack_help {
/* insert conntrack helper private data (master) here */
- struct ip_ct_ftp_master ct_ftp_info;
+ struct nf_ct_ftp_master ct_ftp_info;
+ struct nf_ct_pptp_master ct_pptp_info;
+ struct nf_ct_h323_master ct_h323_info;
+ struct nf_ct_sane_master ct_sane_info;
+ struct nf_ct_sip_master ct_sip_info;
};
#include <linux/types.h>
#include <linux/skbuff.h>
+#include <linux/timer.h>
#ifdef CONFIG_NETFILTER_DEBUG
-#define NF_CT_ASSERT(x) \
-do { \
- if (!(x)) \
- /* Wooah! I'm tripping my conntrack in a frenzy of \
- netplay... */ \
- printk("NF_CT_ASSERT: %s:%i(%s)\n", \
- __FILE__, __LINE__, __FUNCTION__); \
-} while(0)
+#define NF_CT_ASSERT(x) WARN_ON(!(x))
#else
#define NF_CT_ASSERT(x)
#endif
struct nf_conntrack_helper;
+/* Must be kept in sync with the classes defined by helpers */
+#define NF_CT_MAX_EXPECT_CLASSES 3
+
/* nf_conn feature for connections that have a helper */
struct nf_conn_help {
/* Helper. if any */
union nf_conntrack_help help;
+ struct hlist_head expectations;
+
/* Current number of expected connections */
- unsigned int expecting;
+ u8 expecting[NF_CT_MAX_EXPECT_CLASSES];
};
#include <net/netfilter/ipv4/nf_conntrack_ipv4.h>
+#include <net/netfilter/ipv6/nf_conntrack_ipv6.h>
+
struct nf_conn
{
/* Usage count in here is 1 for hash table/destruct timer, 1 per skb,
struct ip_conntrack_counter counters[IP_CT_DIR_MAX];
#endif
- /* Unique ID that identifies this conntrack*/
- unsigned int id;
-
- /* features - nat, helper, ... used by allocating system */
- u_int32_t features;
-
#if defined(CONFIG_NF_CONNTRACK_MARK)
u_int32_t mark;
#endif
+#ifdef CONFIG_NF_CONNTRACK_SECMARK
+ u_int32_t secmark;
+#endif
+
/* Storage reserved for other modules: */
union nf_conntrack_proto proto;
- /* features dynamically at the end: helper, nat (both optional) */
- char data[0];
-};
-
-struct nf_conntrack_expect
-{
- /* Internal linked list (global expectation list) */
- struct list_head list;
-
- /* We expect this tuple, with the following mask */
- struct nf_conntrack_tuple tuple, mask;
-
- /* Function to call after setup and insertion */
- void (*expectfn)(struct nf_conn *new,
- struct nf_conntrack_expect *this);
-
- /* The conntrack of the master connection */
- struct nf_conn *master;
-
- /* Timer function; deletes the expectation. */
- struct timer_list timeout;
-
- /* Usage count. */
- atomic_t use;
-
- /* Unique ID */
- unsigned int id;
-
- /* Flags */
- unsigned int flags;
+ /* Extensions */
+ struct nf_ct_ext *ext;
-#ifdef CONFIG_NF_NAT_NEEDED
- /* This is the original per-proto part, used to map the
- * expected connection the way the recipient expects. */
- union nf_conntrack_manip_proto saved_proto;
- /* Direction relative to the master connection. */
- enum ip_conntrack_dir dir;
-#endif
+ struct rcu_head rcu;
};
-#define NF_CT_EXPECT_PERMANENT 0x1
-
static inline struct nf_conn *
nf_ct_tuplehash_to_ctrack(const struct nf_conntrack_tuple_hash *hash)
{
tuplehash[hash->tuple.dst.dir]);
}
+static inline u_int16_t nf_ct_l3num(const struct nf_conn *ct)
+{
+ return ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num;
+}
+
+static inline u_int8_t nf_ct_protonum(const struct nf_conn *ct)
+{
+ return ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum;
+}
+
/* get master conntrack via master expectation */
#define master_ct(conntr) (conntr->master)
/* Alter reply tuple (maybe alter helper). */
extern void
-nf_conntrack_alter_reply(struct nf_conn *conntrack,
+nf_conntrack_alter_reply(struct nf_conn *ct,
const struct nf_conntrack_tuple *newreply);
/* Is this tuple taken? (ignoring any belonging to the given
extern int nf_ct_l3proto_try_module_get(unsigned short l3proto);
extern void nf_ct_l3proto_module_put(unsigned short l3proto);
+extern struct hlist_head *nf_ct_alloc_hashtable(unsigned int *sizep, int *vmalloced);
+extern void nf_ct_free_hashtable(struct hlist_head *hash, int vmalloced,
+ unsigned int size);
+
extern struct nf_conntrack_tuple_hash *
-__nf_conntrack_find(const struct nf_conntrack_tuple *tuple,
- const struct nf_conn *ignored_conntrack);
+__nf_conntrack_find(const struct nf_conntrack_tuple *tuple);
extern void nf_conntrack_hash_insert(struct nf_conn *ct);
-extern struct nf_conntrack_expect *
-__nf_conntrack_expect_find(const struct nf_conntrack_tuple *tuple);
-
-extern struct nf_conntrack_expect *
-nf_conntrack_expect_find(const struct nf_conntrack_tuple *tuple);
-
-extern void nf_ct_unlink_expect(struct nf_conntrack_expect *exp);
-
-extern void nf_ct_remove_expectations(struct nf_conn *ct);
-
extern void nf_conntrack_flush(void);
-extern struct nf_conntrack_helper *
-nf_ct_helper_find_get( const struct nf_conntrack_tuple *tuple);
-extern void nf_ct_helper_put(struct nf_conntrack_helper *helper);
-
-extern struct nf_conntrack_helper *
-__nf_conntrack_helper_find_byname(const char *name);
-
+extern int nf_ct_get_tuplepr(const struct sk_buff *skb,
+ unsigned int nhoff,
+ u_int16_t l3num,
+ struct nf_conntrack_tuple *tuple);
extern int nf_ct_invert_tuplepr(struct nf_conntrack_tuple *inverse,
const struct nf_conntrack_tuple *orig);
/* These are for NAT. Icky. */
/* Update TCP window tracking data when NAT mangles the packet */
-extern void nf_conntrack_tcp_update(struct sk_buff *skb,
+extern void nf_conntrack_tcp_update(const struct sk_buff *skb,
unsigned int dataoff,
- struct nf_conn *conntrack,
+ struct nf_conn *ct,
int dir);
-/* Call me when a conntrack is destroyed. */
-extern void (*nf_conntrack_destroyed)(struct nf_conn *conntrack);
-
/* Fake conntrack entry for untracked connections */
extern struct nf_conn nf_conntrack_untracked;
-extern int nf_ct_no_defrag;
-
/* Iterate over all conntracks: if iter returns true, it's deleted. */
extern void
nf_ct_iterate_cleanup(int (*iter)(struct nf_conn *i, void *data), void *data);
return test_bit(IPS_DYING_BIT, &ct->status);
}
-extern unsigned int nf_conntrack_htable_size;
-
-#define NF_CT_STAT_INC(count) (__get_cpu_var(nf_conntrack_stat).count++)
-
-#ifdef CONFIG_NF_CONNTRACK_EVENTS
-#include <linux/notifier.h>
-#include <linux/interrupt.h>
-
-struct nf_conntrack_ecache {
- struct nf_conn *ct;
- unsigned int events;
-};
-DECLARE_PER_CPU(struct nf_conntrack_ecache, nf_conntrack_ecache);
-
-#define CONNTRACK_ECACHE(x) (__get_cpu_var(nf_conntrack_ecache).x)
-
-extern struct atomic_notifier_head nf_conntrack_chain;
-extern struct atomic_notifier_head nf_conntrack_expect_chain;
-
-static inline int nf_conntrack_register_notifier(struct notifier_block *nb)
-{
- return atomic_notifier_chain_register(&nf_conntrack_chain, nb);
-}
-
-static inline int nf_conntrack_unregister_notifier(struct notifier_block *nb)
-{
- return atomic_notifier_chain_unregister(&nf_conntrack_chain, nb);
-}
-
-static inline int
-nf_conntrack_expect_register_notifier(struct notifier_block *nb)
-{
- return atomic_notifier_chain_register(&nf_conntrack_expect_chain, nb);
-}
-
-static inline int
-nf_conntrack_expect_unregister_notifier(struct notifier_block *nb)
-{
- return atomic_notifier_chain_unregister(&nf_conntrack_expect_chain,
- nb);
-}
-
-extern void nf_ct_deliver_cached_events(const struct nf_conn *ct);
-extern void __nf_ct_event_cache_init(struct nf_conn *ct);
-
-static inline void
-nf_conntrack_event_cache(enum ip_conntrack_events event,
- const struct sk_buff *skb)
-{
- struct nf_conn *ct = (struct nf_conn *)skb->nfct;
- struct nf_conntrack_ecache *ecache;
-
- local_bh_disable();
- ecache = &__get_cpu_var(nf_conntrack_ecache);
- if (ct != ecache->ct)
- __nf_ct_event_cache_init(ct);
- ecache->events |= event;
- local_bh_enable();
-}
-
-static inline void nf_conntrack_event(enum ip_conntrack_events event,
- struct nf_conn *ct)
-{
- if (nf_ct_is_confirmed(ct) && !nf_ct_is_dying(ct))
- atomic_notifier_call_chain(&nf_conntrack_chain, event, ct);
-}
-
-static inline void
-nf_conntrack_expect_event(enum ip_conntrack_expect_events event,
- struct nf_conntrack_expect *exp)
+static inline int nf_ct_is_untracked(const struct sk_buff *skb)
{
- atomic_notifier_call_chain(&nf_conntrack_expect_chain, event, exp);
+ return (skb->nfct == &nf_conntrack_untracked.ct_general);
}
-#else /* CONFIG_NF_CONNTRACK_EVENTS */
-static inline void nf_conntrack_event_cache(enum ip_conntrack_events event,
- const struct sk_buff *skb) {}
-static inline void nf_conntrack_event(enum ip_conntrack_events event,
- struct nf_conn *ct) {}
-static inline void nf_ct_deliver_cached_events(const struct nf_conn *ct) {}
-static inline void
-nf_conntrack_expect_event(enum ip_conntrack_expect_events event,
- struct nf_conntrack_expect *exp) {}
-#endif /* CONFIG_NF_CONNTRACK_EVENTS */
-
-/* no helper, no nat */
-#define NF_CT_F_BASIC 0
-/* for helper */
-#define NF_CT_F_HELP 1
-/* for nat. */
-#define NF_CT_F_NAT 2
-#define NF_CT_F_NUM 4
-extern int
-nf_conntrack_register_cache(u_int32_t features, const char *name, size_t size);
-extern void
-nf_conntrack_unregister_cache(u_int32_t features);
-
-/* valid combinations:
- * basic: nf_conn, nf_conn .. nf_conn_help
- * nat: nf_conn .. nf_conn_nat, nf_conn .. nf_conn_nat, nf_conn help
- */
-static inline struct nf_conn_help *nfct_help(const struct nf_conn *ct)
-{
- unsigned int offset = sizeof(struct nf_conn);
-
- if (!(ct->features & NF_CT_F_HELP))
- return NULL;
+extern int nf_conntrack_set_hashsize(const char *val, struct kernel_param *kp);
+extern unsigned int nf_conntrack_htable_size;
+extern int nf_conntrack_checksum;
+extern atomic_t nf_conntrack_count;
+extern int nf_conntrack_max;
- return (struct nf_conn_help *) ((void *)ct + offset);
-}
+DECLARE_PER_CPU(struct ip_conntrack_stat, nf_conntrack_stat);
+#define NF_CT_STAT_INC(count) (__get_cpu_var(nf_conntrack_stat).count++)
+#define NF_CT_STAT_INC_ATOMIC(count) \
+do { \
+ local_bh_disable(); \
+ __get_cpu_var(nf_conntrack_stat).count++; \
+ local_bh_enable(); \
+} while (0)
#endif /* __KERNEL__ */
#endif /* _NF_CONNTRACK_H */
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