1 files changed, 104 insertions, 0 deletions
diff --git a/include/net/netfilter/nf_conntrack_core.h b/include/net/netfilter/nf_conntrack_core.h
new file mode 100644
index 000000000..a36f87af4
--- /dev/null
+++ b/include/net/netfilter/nf_conntrack_core.h
@@ -0,0 +1,104 @@
+/* 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(struct sk_buff *skb, unsigned int protoff,
+			struct nf_conn *ct, enum ip_conntrack_info ctinfo);
+
+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 */