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-rw-r--r--include/net/netfilter/ipv4/nf_conntrack_icmp.h11
-rw-r--r--include/net/netfilter/ipv4/nf_conntrack_ipv4.h43
-rw-r--r--include/net/netfilter/ipv6/nf_conntrack_icmpv6.h27
-rw-r--r--include/net/netfilter/nf_conntrack.h354
-rw-r--r--include/net/netfilter/nf_conntrack_compat.h108
-rw-r--r--include/net/netfilter/nf_conntrack_core.h76
-rw-r--r--include/net/netfilter/nf_conntrack_helper.h51
-rw-r--r--include/net/netfilter/nf_conntrack_l3proto.h93
-rw-r--r--include/net/netfilter/nf_conntrack_protocol.h105
-rw-r--r--include/net/netfilter/nf_conntrack_tuple.h190
10 files changed, 1058 insertions, 0 deletions
diff --git a/include/net/netfilter/ipv4/nf_conntrack_icmp.h b/include/net/netfilter/ipv4/nf_conntrack_icmp.h
new file mode 100644
index 00000000000..3dd22cff23e
--- /dev/null
+++ b/include/net/netfilter/ipv4/nf_conntrack_icmp.h
@@ -0,0 +1,11 @@
+#ifndef _NF_CONNTRACK_ICMP_H
+#define _NF_CONNTRACK_ICMP_H
+/* ICMP tracking. */
+#include <asm/atomic.h>
+
+struct ip_ct_icmp
+{
+ /* Optimization: when number in == number out, forget immediately. */
+ atomic_t count;
+};
+#endif /* _NF_CONNTRACK_ICMP_H */
diff --git a/include/net/netfilter/ipv4/nf_conntrack_ipv4.h b/include/net/netfilter/ipv4/nf_conntrack_ipv4.h
new file mode 100644
index 00000000000..25b081a730e
--- /dev/null
+++ b/include/net/netfilter/ipv4/nf_conntrack_ipv4.h
@@ -0,0 +1,43 @@
+/*
+ * IPv4 support for nf_conntrack.
+ *
+ * 23 Mar 2004: Yasuyuki Kozakai @ USAGI <yasuyuki.kozakai@toshiba.co.jp>
+ * - move L3 protocol dependent part from include/linux/netfilter_ipv4/
+ * ip_conntarck.h
+ */
+
+#ifndef _NF_CONNTRACK_IPV4_H
+#define _NF_CONNTRACK_IPV4_H
+
+#ifdef CONFIG_IP_NF_NAT_NEEDED
+#include <linux/netfilter_ipv4/ip_nat.h>
+
+/* per conntrack: nat application helper private data */
+union ip_conntrack_nat_help {
+ /* insert nat helper private data here */
+};
+
+struct nf_conntrack_ipv4_nat {
+ struct ip_nat_info info;
+ union ip_conntrack_nat_help help;
+#if defined(CONFIG_IP_NF_TARGET_MASQUERADE) || \
+ defined(CONFIG_IP_NF_TARGET_MASQUERADE_MODULE)
+ int masq_index;
+#endif
+};
+#endif /* CONFIG_IP_NF_NAT_NEEDED */
+
+struct nf_conntrack_ipv4 {
+#ifdef CONFIG_IP_NF_NAT_NEEDED
+ struct nf_conntrack_ipv4_nat *nat;
+#endif
+};
+
+/* Returns new sk_buff, or NULL */
+struct sk_buff *
+nf_ct_ipv4_ct_gather_frags(struct sk_buff *skb);
+
+/* call to create an explicit dependency on nf_conntrack_l3proto_ipv4. */
+extern void need_ip_conntrack(void);
+
+#endif /*_NF_CONNTRACK_IPV4_H*/
diff --git a/include/net/netfilter/ipv6/nf_conntrack_icmpv6.h b/include/net/netfilter/ipv6/nf_conntrack_icmpv6.h
new file mode 100644
index 00000000000..86591afda29
--- /dev/null
+++ b/include/net/netfilter/ipv6/nf_conntrack_icmpv6.h
@@ -0,0 +1,27 @@
+/*
+ * ICMPv6 tracking.
+ *
+ * 21 Apl 2004: Yasuyuki Kozakai @USAGI <yasuyuki.kozakai@toshiba.co.jp>
+ * - separated from nf_conntrack_icmp.h
+ *
+ * Derived from include/linux/netfiter_ipv4/ip_conntrack_icmp.h
+ */
+
+#ifndef _NF_CONNTRACK_ICMPV6_H
+#define _NF_CONNTRACK_ICMPV6_H
+#include <asm/atomic.h>
+
+#ifndef ICMPV6_NI_QUERY
+#define ICMPV6_NI_QUERY 139
+#endif
+#ifndef ICMPV6_NI_REPLY
+#define ICMPV6_NI_REPLY 140
+#endif
+
+struct nf_ct_icmpv6
+{
+ /* Optimization: when number in == number out, forget immediately. */
+ atomic_t count;
+};
+
+#endif /* _NF_CONNTRACK_ICMPV6_H */
diff --git a/include/net/netfilter/nf_conntrack.h b/include/net/netfilter/nf_conntrack.h
new file mode 100644
index 00000000000..cc482561079
--- /dev/null
+++ b/include/net/netfilter/nf_conntrack.h
@@ -0,0 +1,354 @@
+/*
+ * Connection state tracking for netfilter. This is separated from,
+ * but required by, the (future) NAT layer; it can also be used by an iptables
+ * extension.
+ *
+ * 16 Dec 2003: Yasuyuki Kozakai @USAGI <yasuyuki.kozakai@toshiba.co.jp>
+ * - generalize L3 protocol dependent part.
+ *
+ * Derived from include/linux/netfiter_ipv4/ip_conntrack.h
+ */
+
+#ifndef _NF_CONNTRACK_H
+#define _NF_CONNTRACK_H
+
+#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_sctp.h>
+#include <net/netfilter/ipv4/nf_conntrack_icmp.h>
+#include <net/netfilter/ipv6/nf_conntrack_icmpv6.h>
+
+#include <net/netfilter/nf_conntrack_tuple.h>
+
+/* per conntrack: protocol private data */
+union nf_conntrack_proto {
+ /* insert conntrack proto private data here */
+ struct ip_ct_sctp sctp;
+ struct ip_ct_tcp tcp;
+ struct ip_ct_icmp icmp;
+ struct nf_ct_icmpv6 icmpv6;
+};
+
+union nf_conntrack_expect_proto {
+ /* insert expect proto private data here */
+};
+
+/* Add protocol helper include file here */
+#include <linux/netfilter/nf_conntrack_ftp.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;
+};
+
+#include <linux/types.h>
+#include <linux/skbuff.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)
+#else
+#define NF_CT_ASSERT(x)
+#endif
+
+struct nf_conntrack_helper;
+
+#include <net/netfilter/ipv4/nf_conntrack_ipv4.h>
+struct nf_conn
+{
+ /* Usage count in here is 1 for hash table/destruct timer, 1 per skb,
+ plus 1 for any connection(s) we are `master' for */
+ struct nf_conntrack ct_general;
+
+ /* XXX should I move this to the tail ? - Y.K */
+ /* These are my tuples; original and reply */
+ struct nf_conntrack_tuple_hash tuplehash[IP_CT_DIR_MAX];
+
+ /* Have we seen traffic both ways yet? (bitset) */
+ unsigned long status;
+
+ /* Timer function; drops refcnt when it goes off. */
+ struct timer_list timeout;
+
+#ifdef CONFIG_NF_CT_ACCT
+ /* Accounting Information (same cache line as other written members) */
+ struct ip_conntrack_counter counters[IP_CT_DIR_MAX];
+#endif
+ /* If we were expected by an expectation, this will be it */
+ struct nf_conn *master;
+
+ /* Current number of expected connections */
+ unsigned int expecting;
+
+ /* Helper. if any */
+ struct nf_conntrack_helper *helper;
+
+ /* features - nat, helper, ... used by allocating system */
+ u_int32_t features;
+
+ /* Storage reserved for other modules: */
+
+ union nf_conntrack_proto proto;
+
+#if defined(CONFIG_NF_CONNTRACK_MARK)
+ u_int32_t mark;
+#endif
+
+ /* These members are dynamically allocated. */
+
+ union nf_conntrack_help *help;
+
+ /* Layer 3 dependent members. (ex: NAT) */
+ union {
+ struct nf_conntrack_ipv4 *ipv4;
+ } l3proto;
+ void *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;
+
+ /* Flags */
+ unsigned int flags;
+
+#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
+};
+
+#define NF_CT_EXPECT_PERMANENT 0x1
+
+static inline struct nf_conn *
+nf_ct_tuplehash_to_ctrack(const struct nf_conntrack_tuple_hash *hash)
+{
+ return container_of(hash, struct nf_conn,
+ tuplehash[hash->tuple.dst.dir]);
+}
+
+/* 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,
+ const struct nf_conntrack_tuple *newreply);
+
+/* Is this tuple taken? (ignoring any belonging to the given
+ conntrack). */
+extern int
+nf_conntrack_tuple_taken(const struct nf_conntrack_tuple *tuple,
+ const struct nf_conn *ignored_conntrack);
+
+/* Return conntrack_info and tuple hash for given skb. */
+static inline struct nf_conn *
+nf_ct_get(const struct sk_buff *skb, enum ip_conntrack_info *ctinfo)
+{
+ *ctinfo = skb->nfctinfo;
+ return (struct nf_conn *)skb->nfct;
+}
+
+/* decrement reference count on a conntrack */
+static inline void nf_ct_put(struct nf_conn *ct)
+{
+ NF_CT_ASSERT(ct);
+ nf_conntrack_put(&ct->ct_general);
+}
+
+/* call to create an explicit dependency on nf_conntrack. */
+extern void need_nf_conntrack(void);
+
+extern int nf_ct_invert_tuplepr(struct nf_conntrack_tuple *inverse,
+ const struct nf_conntrack_tuple *orig);
+
+extern void __nf_ct_refresh_acct(struct nf_conn *ct,
+ enum ip_conntrack_info ctinfo,
+ const struct sk_buff *skb,
+ unsigned long extra_jiffies,
+ int do_acct);
+
+/* Refresh conntrack for this many jiffies and do accounting */
+static inline void nf_ct_refresh_acct(struct nf_conn *ct,
+ enum ip_conntrack_info ctinfo,
+ const struct sk_buff *skb,
+ unsigned long extra_jiffies)
+{
+ __nf_ct_refresh_acct(ct, ctinfo, skb, extra_jiffies, 1);
+}
+
+/* Refresh conntrack for this many jiffies */
+static inline void nf_ct_refresh(struct nf_conn *ct,
+ const struct sk_buff *skb,
+ unsigned long extra_jiffies)
+{
+ __nf_ct_refresh_acct(ct, 0, skb, extra_jiffies, 0);
+}
+
+/* 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,
+ unsigned int dataoff,
+ struct nf_conn *conntrack,
+ 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);
+extern void nf_conntrack_free(struct nf_conn *ct);
+extern struct nf_conn *
+nf_conntrack_alloc(const struct nf_conntrack_tuple *orig,
+ const struct nf_conntrack_tuple *repl);
+
+/* It's confirmed if it is, or has been in the hash table. */
+static inline int nf_ct_is_confirmed(struct nf_conn *ct)
+{
+ return test_bit(IPS_CONFIRMED_BIT, &ct->status);
+}
+
+static inline int nf_ct_is_dying(struct nf_conn *ct)
+{
+ 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 notifier_block *nf_conntrack_chain;
+extern struct notifier_block *nf_conntrack_expect_chain;
+
+static inline int nf_conntrack_register_notifier(struct notifier_block *nb)
+{
+ return notifier_chain_register(&nf_conntrack_chain, nb);
+}
+
+static inline int nf_conntrack_unregister_notifier(struct notifier_block *nb)
+{
+ return notifier_chain_unregister(&nf_conntrack_chain, nb);
+}
+
+static inline int
+nf_conntrack_expect_register_notifier(struct notifier_block *nb)
+{
+ return notifier_chain_register(&nf_conntrack_expect_chain, nb);
+}
+
+static inline int
+nf_conntrack_expect_unregister_notifier(struct notifier_block *nb)
+{
+ return 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))
+ 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)
+{
+ notifier_call_chain(&nf_conntrack_expect_chain, event, exp);
+}
+#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,
+ int (*init_conntrack)(struct nf_conn *, u_int32_t));
+extern void
+nf_conntrack_unregister_cache(u_int32_t features);
+
+#endif /* __KERNEL__ */
+#endif /* _NF_CONNTRACK_H */
diff --git a/include/net/netfilter/nf_conntrack_compat.h b/include/net/netfilter/nf_conntrack_compat.h
new file mode 100644
index 00000000000..3cac19fb364
--- /dev/null
+++ b/include/net/netfilter/nf_conntrack_compat.h
@@ -0,0 +1,108 @@
+#ifndef _NF_CONNTRACK_COMPAT_H
+#define _NF_CONNTRACK_COMPAT_H
+
+#ifdef __KERNEL__
+
+#if defined(CONFIG_IP_NF_CONNTRACK) || defined(CONFIG_IP_NF_CONNTRACK_MODULE)
+
+#include <linux/netfilter_ipv4/ip_conntrack.h>
+
+#ifdef CONFIG_IP_NF_CONNTRACK_MARK
+static inline u_int32_t *nf_ct_get_mark(const struct sk_buff *skb,
+ u_int32_t *ctinfo)
+{
+ struct ip_conntrack *ct = ip_conntrack_get(skb, ctinfo);
+
+ if (ct)
+ return &ct->mark;
+ else
+ return NULL;
+}
+#endif /* CONFIG_IP_NF_CONNTRACK_MARK */
+
+#ifdef CONFIG_IP_NF_CT_ACCT
+static inline struct ip_conntrack_counter *
+nf_ct_get_counters(const struct sk_buff *skb)
+{
+ enum ip_conntrack_info ctinfo;
+ struct ip_conntrack *ct = ip_conntrack_get(skb, &ctinfo);
+
+ if (ct)
+ return ct->counters;
+ else
+ return NULL;
+}
+#endif /* CONFIG_IP_NF_CT_ACCT */
+
+static inline int nf_ct_is_untracked(const struct sk_buff *skb)
+{
+ return (skb->nfct == &ip_conntrack_untracked.ct_general);
+}
+
+static inline void nf_ct_untrack(struct sk_buff *skb)
+{
+ skb->nfct = &ip_conntrack_untracked.ct_general;
+}
+
+static inline int nf_ct_get_ctinfo(const struct sk_buff *skb,
+ enum ip_conntrack_info *ctinfo)
+{
+ struct ip_conntrack *ct = ip_conntrack_get(skb, ctinfo);
+ return (ct != NULL);
+}
+
+#else /* CONFIG_IP_NF_CONNTRACK */
+
+#include <net/netfilter/ipv4/nf_conntrack_ipv4.h>
+#include <net/netfilter/nf_conntrack.h>
+
+#ifdef CONFIG_NF_CONNTRACK_MARK
+
+static inline u_int32_t *nf_ct_get_mark(const struct sk_buff *skb,
+ u_int32_t *ctinfo)
+{
+ struct nf_conn *ct = nf_ct_get(skb, ctinfo);
+
+ if (ct)
+ return &ct->mark;
+ else
+ return NULL;
+}
+#endif /* CONFIG_NF_CONNTRACK_MARK */
+
+#ifdef CONFIG_NF_CT_ACCT
+static inline struct ip_conntrack_counter *
+nf_ct_get_counters(const struct sk_buff *skb)
+{
+ enum ip_conntrack_info ctinfo;
+ struct nf_conn *ct = nf_ct_get(skb, &ctinfo);
+
+ if (ct)
+ return ct->counters;
+ else
+ return NULL;
+}
+#endif /* CONFIG_NF_CT_ACCT */
+
+static inline int nf_ct_is_untracked(const struct sk_buff *skb)
+{
+ return (skb->nfct == &nf_conntrack_untracked.ct_general);
+}
+
+static inline void nf_ct_untrack(struct sk_buff *skb)
+{
+ skb->nfct = &nf_conntrack_untracked.ct_general;
+}
+
+static inline int nf_ct_get_ctinfo(const struct sk_buff *skb,
+ enum ip_conntrack_info *ctinfo)
+{
+ struct nf_conn *ct = nf_ct_get(skb, ctinfo);
+ return (ct != NULL);
+}
+
+#endif /* CONFIG_IP_NF_CONNTRACK */
+
+#endif /* __KERNEL__ */
+
+#endif /* _NF_CONNTRACK_COMPAT_H */
diff --git a/include/net/netfilter/nf_conntrack_core.h b/include/net/netfilter/nf_conntrack_core.h
new file mode 100644
index 00000000000..da254525a4c
--- /dev/null
+++ b/include/net/netfilter/nf_conntrack_core.h
@@ -0,0 +1,76 @@
+/*
+ * 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>
+
+/* This header is used to share core functionality between the
+ standalone connection tracking module, and the compatibility layer's use
+ of connection tracking. */
+extern unsigned int nf_conntrack_in(int pf,
+ unsigned int hooknum,
+ struct sk_buff **pskb);
+
+extern int nf_conntrack_init(void);
+extern void nf_conntrack_cleanup(void);
+
+struct nf_conntrack_l3proto;
+extern struct nf_conntrack_l3proto *nf_ct_find_l3proto(u_int16_t pf);
+/* Like above, but you already have conntrack read lock. */
+extern struct nf_conntrack_l3proto *__nf_ct_find_l3proto(u_int16_t l3proto);
+
+struct nf_conntrack_protocol;
+
+extern int
+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_protocol *protocol);
+
+extern int
+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_protocol *protocol);
+
+/* Find a connection corresponding to a tuple. */
+extern struct nf_conntrack_tuple_hash *
+nf_conntrack_find_get(const struct nf_conntrack_tuple *tuple,
+ const struct nf_conn *ignored_conntrack);
+
+extern int __nf_conntrack_confirm(struct sk_buff **pskb);
+
+/* Confirm a connection: returns NF_DROP if packet must be dropped. */
+static inline int nf_conntrack_confirm(struct sk_buff **pskb)
+{
+ struct nf_conn *ct = (struct nf_conn *)(*pskb)->nfct;
+ int ret = NF_ACCEPT;
+
+ if (ct) {
+ if (!nf_ct_is_confirmed(ct))
+ ret = __nf_conntrack_confirm(pskb);
+ nf_ct_deliver_cached_events(ct);
+ }
+ return ret;
+}
+
+extern void __nf_conntrack_attach(struct sk_buff *nskb, struct sk_buff *skb);
+
+extern struct list_head *nf_conntrack_hash;
+extern struct list_head nf_conntrack_expect_list;
+extern rwlock_t nf_conntrack_lock ;
+#endif /* _NF_CONNTRACK_CORE_H */
diff --git a/include/net/netfilter/nf_conntrack_helper.h b/include/net/netfilter/nf_conntrack_helper.h
new file mode 100644
index 00000000000..5a66b2a3a62
--- /dev/null
+++ b/include/net/netfilter/nf_conntrack_helper.h
@@ -0,0 +1,51 @@
+/*
+ * connection tracking helpers.
+ *
+ * 16 Dec 2003: Yasuyuki Kozakai @USAGI <yasuyuki.kozakai@toshiba.co.jp>
+ * - generalize L3 protocol dependent part.
+ *
+ * Derived from include/linux/netfiter_ipv4/ip_conntrack_helper.h
+ */
+
+#ifndef _NF_CONNTRACK_HELPER_H
+#define _NF_CONNTRACK_HELPER_H
+#include <net/netfilter/nf_conntrack.h>
+
+struct module;
+
+struct nf_conntrack_helper
+{
+ struct list_head list; /* Internal use. */
+
+ const char *name; /* name of the module */
+ struct module *me; /* pointer to self */
+ unsigned int max_expected; /* Maximum number of concurrent
+ * expected connections */
+ unsigned int timeout; /* timeout for expecteds */
+
+ /* Mask of things we will help (compared against server response) */
+ struct nf_conntrack_tuple tuple;
+ struct nf_conntrack_tuple mask;
+
+ /* Function to call when data passes; return verdict, or -1 to
+ invalidate. */
+ int (*help)(struct sk_buff **pskb,
+ unsigned int protoff,
+ struct nf_conn *ct,
+ enum ip_conntrack_info conntrackinfo);
+};
+
+extern int nf_conntrack_helper_register(struct nf_conntrack_helper *);
+extern void nf_conntrack_helper_unregister(struct nf_conntrack_helper *);
+
+/* Allocate space for an expectation: this is mandatory before calling
+ nf_conntrack_expect_related. You will have to call put afterwards. */
+extern struct nf_conntrack_expect *
+nf_conntrack_expect_alloc(struct nf_conn *master);
+extern void nf_conntrack_expect_put(struct nf_conntrack_expect *exp);
+
+/* Add an expected connection: can have more than one per connection */
+extern int nf_conntrack_expect_related(struct nf_conntrack_expect *exp);
+extern void nf_conntrack_unexpect_related(struct nf_conntrack_expect *exp);
+
+#endif /*_NF_CONNTRACK_HELPER_H*/
diff --git a/include/net/netfilter/nf_conntrack_l3proto.h b/include/net/netfilter/nf_conntrack_l3proto.h
new file mode 100644
index 00000000000..01663e5b33d
--- /dev/null
+++ b/include/net/netfilter/nf_conntrack_l3proto.h
@@ -0,0 +1,93 @@
+/*
+ * Copyright (C)2003,2004 USAGI/WIDE Project
+ *
+ * Header for use in defining a given L3 protocol for connection tracking.
+ *
+ * Author:
+ * Yasuyuki Kozakai @USAGI <yasuyuki.kozakai@toshiba.co.jp>
+ *
+ * Derived from include/netfilter_ipv4/ip_conntrack_protocol.h
+ */
+
+#ifndef _NF_CONNTRACK_L3PROTO_H
+#define _NF_CONNTRACK_L3PROTO_H
+#include <linux/seq_file.h>
+#include <net/netfilter/nf_conntrack.h>
+
+struct nf_conntrack_l3proto
+{
+ /* Next pointer. */
+ struct list_head list;
+
+ /* L3 Protocol Family number. ex) PF_INET */
+ u_int16_t l3proto;
+
+ /* Protocol name */
+ const char *name;
+
+ /*
+ * Try to fill in the third arg: nhoff is offset of l3 proto
+ * hdr. Return true if possible.
+ */
+ int (*pkt_to_tuple)(const struct sk_buff *skb, unsigned int nhoff,
+ struct nf_conntrack_tuple *tuple);
+
+ /*
+ * Invert the per-proto part of the tuple: ie. turn xmit into reply.
+ * Some packets can't be inverted: return 0 in that case.
+ */
+ int (*invert_tuple)(struct nf_conntrack_tuple *inverse,
+ const struct nf_conntrack_tuple *orig);
+
+ /* Print out the per-protocol part of the tuple. */
+ int (*print_tuple)(struct seq_file *s,
+ const struct nf_conntrack_tuple *);
+
+ /* Print out the private part of the conntrack. */
+ int (*print_conntrack)(struct seq_file *s, const struct nf_conn *);
+
+ /* Returns verdict for packet, or -1 for invalid. */
+ int (*packet)(struct nf_conn *conntrack,
+ const struct sk_buff *skb,
+ enum ip_conntrack_info ctinfo);
+
+ /*
+ * Called when a new connection for this protocol found;
+ * returns TRUE if it's OK. If so, packet() called next.
+ */
+ int (*new)(struct nf_conn *conntrack, const struct sk_buff *skb);
+
+ /* Called when a conntrack entry is destroyed */
+ void (*destroy)(struct nf_conn *conntrack);
+
+ /*
+ * Called before tracking.
+ * *dataoff: offset of protocol header (TCP, UDP,...) in *pskb
+ * *protonum: protocol number
+ */
+ int (*prepare)(struct sk_buff **pskb, unsigned int hooknum,
+ unsigned int *dataoff, u_int8_t *protonum);
+
+ u_int32_t (*get_features)(const struct nf_conntrack_tuple *tuple);
+
+ /* Module (if any) which this is connected to. */
+ struct module *me;
+};
+
+extern struct nf_conntrack_l3proto *nf_ct_l3protos[AF_MAX];
+
+/* Protocol registration. */
+extern int nf_conntrack_l3proto_register(struct nf_conntrack_l3proto *proto);
+extern void nf_conntrack_l3proto_unregister(struct nf_conntrack_l3proto *proto);
+
+static inline struct nf_conntrack_l3proto *
+nf_ct_find_l3proto(u_int16_t l3proto)
+{
+ return nf_ct_l3protos[l3proto];
+}
+
+/* Existing built-in protocols */
+extern struct nf_conntrack_l3proto nf_conntrack_l3proto_ipv4;
+extern struct nf_conntrack_l3proto nf_conntrack_l3proto_ipv6;
+extern struct nf_conntrack_l3proto nf_conntrack_generic_l3proto;
+#endif /*_NF_CONNTRACK_L3PROTO_H*/
diff --git a/include/net/netfilter/nf_conntrack_protocol.h b/include/net/netfilter/nf_conntrack_protocol.h
new file mode 100644
index 00000000000..b3afda35397
--- /dev/null
+++ b/include/net/netfilter/nf_conntrack_protocol.h
@@ -0,0 +1,105 @@
+/*
+ * Header for use in defining a given protocol for connection tracking.
+ *
+ * 16 Dec 2003: Yasuyuki Kozakai @USAGI <yasuyuki.kozakai@toshiba.co.jp>
+ * - generalized L3 protocol dependent part.
+ *
+ * Derived from include/linux/netfiter_ipv4/ip_conntrack_protcol.h
+ */
+
+#ifndef _NF_CONNTRACK_PROTOCOL_H
+#define _NF_CONNTRACK_PROTOCOL_H
+#include <net/netfilter/nf_conntrack.h>
+
+struct seq_file;
+
+struct nf_conntrack_protocol
+{
+ /* Next pointer. */
+ struct list_head list;
+
+ /* L3 Protocol number. */
+ u_int16_t l3proto;
+
+ /* Protocol number. */
+ u_int8_t proto;
+
+ /* Protocol name */
+ const char *name;
+
+ /* Try to fill in the third arg: dataoff is offset past network protocol
+ hdr. Return true if possible. */
+ int (*pkt_to_tuple)(const struct sk_buff *skb,
+ unsigned int dataoff,
+ struct nf_conntrack_tuple *tuple);
+
+ /* Invert the per-proto part of the tuple: ie. turn xmit into reply.
+ * Some packets can't be inverted: return 0 in that case.
+ */
+ int (*invert_tuple)(struct nf_conntrack_tuple *inverse,
+ const struct nf_conntrack_tuple *orig);
+
+ /* Print out the per-protocol part of the tuple. Return like seq_* */
+ int (*print_tuple)(struct seq_file *s,
+ const struct nf_conntrack_tuple *);
+
+ /* Print out the private part of the conntrack. */
+ int (*print_conntrack)(struct seq_file *s, const struct nf_conn *);
+
+ /* Returns verdict for packet, or -1 for invalid. */
+ int (*packet)(struct nf_conn *conntrack,
+ const struct sk_buff *skb,
+ unsigned int dataoff,
+ enum ip_conntrack_info ctinfo,
+ int pf,
+ unsigned int hooknum);
+
+ /* Called when a new connection for this protocol found;
+ * returns TRUE if it's OK. If so, packet() called next. */
+ int (*new)(struct nf_conn *conntrack, const struct sk_buff *skb,
+ unsigned int dataoff);
+
+ /* Called when a conntrack entry is destroyed */
+ void (*destroy)(struct nf_conn *conntrack);
+
+ int (*error)(struct sk_buff *skb, unsigned int dataoff,
+ enum ip_conntrack_info *ctinfo,
+ int pf, unsigned int hooknum);
+
+ /* Module (if any) which this is connected to. */
+ struct module *me;
+};
+
+/* Existing built-in protocols */
+extern struct nf_conntrack_protocol nf_conntrack_protocol_tcp6;
+extern struct nf_conntrack_protocol nf_conntrack_protocol_udp4;
+extern struct nf_conntrack_protocol nf_conntrack_protocol_udp6;
+extern struct nf_conntrack_protocol nf_conntrack_generic_protocol;
+
+#define MAX_NF_CT_PROTO 256
+extern struct nf_conntrack_protocol **nf_ct_protos[PF_MAX];
+
+extern struct nf_conntrack_protocol *
+nf_ct_find_proto(u_int16_t l3proto, u_int8_t protocol);
+
+/* Protocol registration. */
+extern int nf_conntrack_protocol_register(struct nf_conntrack_protocol *proto);
+extern void nf_conntrack_protocol_unregister(struct nf_conntrack_protocol *proto);
+
+/* Log invalid packets */
+extern unsigned int nf_ct_log_invalid;
+
+#ifdef CONFIG_SYSCTL
+#ifdef DEBUG_INVALID_PACKETS
+#define LOG_INVALID(proto) \
+ (nf_ct_log_invalid == (proto) || nf_ct_log_invalid == IPPROTO_RAW)
+#else
+#define LOG_INVALID(proto) \
+ ((nf_ct_log_invalid == (proto) || nf_ct_log_invalid == IPPROTO_RAW) \
+ && net_ratelimit())
+#endif
+#else
+#define LOG_INVALID(proto) 0
+#endif /* CONFIG_SYSCTL */
+
+#endif /*_NF_CONNTRACK_PROTOCOL_H*/
diff --git a/include/net/netfilter/nf_conntrack_tuple.h b/include/net/netfilter/nf_conntrack_tuple.h
new file mode 100644
index 00000000000..14ce790e5c6
--- /dev/null
+++ b/include/net/netfilter/nf_conntrack_tuple.h
@@ -0,0 +1,190 @@
+/*
+ * Definitions and Declarations for tuple.
+ *
+ * 16 Dec 2003: Yasuyuki Kozakai @USAGI <yasuyuki.kozakai@toshiba.co.jp>
+ * - generalize L3 protocol dependent part.
+ *
+ * Derived from include/linux/netfiter_ipv4/ip_conntrack_tuple.h
+ */
+
+#ifndef _NF_CONNTRACK_TUPLE_H
+#define _NF_CONNTRACK_TUPLE_H
+
+#include <linux/netfilter/nf_conntrack_tuple_common.h>
+
+/* A `tuple' is a structure containing the information to uniquely
+ identify a connection. ie. if two packets have the same tuple, they
+ are in the same connection; if not, they are not.
+
+ We divide the structure along "manipulatable" and
+ "non-manipulatable" lines, for the benefit of the NAT code.
+*/
+
+#define NF_CT_TUPLE_L3SIZE 4
+
+/* The l3 protocol-specific manipulable parts of the tuple: always in
+ network order! */
+union nf_conntrack_man_l3proto {
+ u_int32_t all[NF_CT_TUPLE_L3SIZE];
+ u_int32_t ip;
+ u_int32_t ip6[4];
+};
+
+/* The protocol-specific manipulable parts of the tuple: always in
+ network order! */
+union nf_conntrack_man_proto
+{
+ /* Add other protocols here. */
+ u_int16_t all;
+
+ struct {
+ u_int16_t port;
+ } tcp;
+ struct {
+ u_int16_t port;
+ } udp;
+ struct {
+ u_int16_t id;
+ } icmp;
+ struct {
+ u_int16_t port;
+ } sctp;
+};
+
+/* The manipulable part of the tuple. */
+struct nf_conntrack_man
+{
+ union nf_conntrack_man_l3proto u3;
+ union nf_conntrack_man_proto u;
+ /* Layer 3 protocol */
+ u_int16_t l3num;
+};
+
+/* This contains the information to distinguish a connection. */
+struct nf_conntrack_tuple
+{
+ struct nf_conntrack_man src;
+
+ /* These are the parts of the tuple which are fixed. */
+ struct {
+ union {
+ u_int32_t all[NF_CT_TUPLE_L3SIZE];
+ u_int32_t ip;
+ u_int32_t ip6[4];
+ } u3;
+ union {
+ /* Add other protocols here. */
+ u_int16_t all;
+
+ struct {
+ u_int16_t port;
+ } tcp;
+ struct {
+ u_int16_t port;
+ } udp;
+ struct {
+ u_int8_t type, code;
+ } icmp;
+ struct {
+ u_int16_t port;
+ } sctp;
+ } u;
+
+ /* The protocol. */
+ u_int8_t protonum;
+
+ /* The direction (for tuplehash) */
+ u_int8_t dir;
+ } dst;
+};
+
+/* This is optimized opposed to a memset of the whole structure. Everything we
+ * really care about is the source/destination unions */
+#define NF_CT_TUPLE_U_BLANK(tuple) \
+ do { \
+ (tuple)->src.u.all = 0; \
+ (tuple)->dst.u.all = 0; \
+ memset(&(tuple)->src.u3, 0, sizeof((tuple)->src.u3)); \
+ memset(&(tuple)->dst.u3, 0, sizeof((tuple)->dst.u3)); \
+ } while (0)
+
+#ifdef __KERNEL__
+
+#define NF_CT_DUMP_TUPLE(tp) \
+DEBUGP("tuple %p: %u %u %04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x %hu -> %04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x %hu\n", \
+ (tp), (tp)->src.l3num, (tp)->dst.protonum, \
+ NIP6(*(struct in6_addr *)(tp)->src.u3.all), ntohs((tp)->src.u.all), \
+ NIP6(*(struct in6_addr *)(tp)->dst.u3.all), ntohs((tp)->dst.u.all))
+
+/* If we're the first tuple, it's the original dir. */
+#define NF_CT_DIRECTION(h) \
+ ((enum ip_conntrack_dir)(h)->tuple.dst.dir)
+
+/* Connections have two entries in the hash table: one for each way */
+struct nf_conntrack_tuple_hash
+{
+ struct list_head list;
+
+ struct nf_conntrack_tuple tuple;
+};
+
+#endif /* __KERNEL__ */
+
+static inline int nf_ct_tuple_src_equal(const struct nf_conntrack_tuple *t1,
+ const struct nf_conntrack_tuple *t2)
+{
+ return (t1->src.u3.all[0] == t2->src.u3.all[0] &&
+ t1->src.u3.all[1] == t2->src.u3.all[1] &&
+ t1->src.u3.all[2] == t2->src.u3.all[2] &&
+ t1->src.u3.all[3] == t2->src.u3.all[3] &&
+ t1->src.u.all == t2->src.u.all &&
+ t1->src.l3num == t2->src.l3num &&
+ t1->dst.protonum == t2->dst.protonum);
+}
+
+static inline int nf_ct_tuple_dst_equal(const struct nf_conntrack_tuple *t1,
+ const struct nf_conntrack_tuple *t2)
+{
+ return (t1->dst.u3.all[0] == t2->dst.u3.all[0] &&
+ t1->dst.u3.all[1] == t2->dst.u3.all[1] &&
+ t1->dst.u3.all[2] == t2->dst.u3.all[2] &&
+ t1->dst.u3.all[3] == t2->dst.u3.all[3] &&
+ t1->dst.u.all == t2->dst.u.all &&
+ t1->src.l3num == t2->src.l3num &&
+ t1->dst.protonum == t2->dst.protonum);
+}
+
+static inline int nf_ct_tuple_equal(const struct nf_conntrack_tuple *t1,
+ const struct nf_conntrack_tuple *t2)
+{
+ return nf_ct_tuple_src_equal(t1, t2) && nf_ct_tuple_dst_equal(t1, t2);
+}
+
+static inline int nf_ct_tuple_mask_cmp(const struct nf_conntrack_tuple *t,
+ const struct nf_conntrack_tuple *tuple,
+ const struct nf_conntrack_tuple *mask)
+{
+ int count = 0;
+
+ for (count = 0; count < NF_CT_TUPLE_L3SIZE; count++){
+ if ((t->src.u3.all[count] ^ tuple->src.u3.all[count]) &
+ mask->src.u3.all[count])
+ return 0;
+ }
+
+ for (count = 0; count < NF_CT_TUPLE_L3SIZE; count++){
+ if ((t->dst.u3.all[count] ^ tuple->dst.u3.all[count]) &
+ mask->dst.u3.all[count])
+ return 0;
+ }
+
+ if ((t->src.u.all ^ tuple->src.u.all) & mask->src.u.all ||
+ (t->dst.u.all ^ tuple->dst.u.all) & mask->dst.u.all ||
+ (t->src.l3num ^ tuple->src.l3num) & mask->src.l3num ||
+ (t->dst.protonum ^ tuple->dst.protonum) & mask->dst.protonum)
+ return 0;
+
+ return 1;
+}
+
+#endif /* _NF_CONNTRACK_TUPLE_H */