1 files changed, 91 insertions, 0 deletions
diff --git a/include/linux/netfilter_ipv4/ip_tables.h b/include/linux/netfilter_ipv4/ip_tables.h
new file mode 100644
index 000000000..132b0e4a6
--- /dev/null
+++ b/include/linux/netfilter_ipv4/ip_tables.h
@@ -0,0 +1,91 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * 25-Jul-1998 Major changes to allow for ip chain table
+ *
+ * 3-Jan-2000 Named tables to allow packet selection for different uses.
+ */
+
+/*
+ * 	Format of an IP firewall descriptor
+ *
+ * 	src, dst, src_mask, dst_mask are always stored in network byte order.
+ * 	flags are stored in host byte order (of course).
+ * 	Port numbers are stored in HOST byte order.
+ */
+#ifndef _IPTABLES_H
+#define _IPTABLES_H
+
+#include <linux/if.h>
+#include <linux/in.h>
+#include <linux/init.h>
+#include <linux/ip.h>
+#include <linux/skbuff.h>
+#include <uapi/linux/netfilter_ipv4/ip_tables.h>
+
+int ipt_register_table(struct net *net, const struct xt_table *table,
+		       const struct ipt_replace *repl,
+		       const struct nf_hook_ops *ops);
+
+void ipt_unregister_table_pre_exit(struct net *net, const char *name);
+void ipt_unregister_table_exit(struct net *net, const char *name);
+
+/* Standard entry. */
+struct ipt_standard {
+	struct ipt_entry entry;
+	struct xt_standard_target target;
+};
+
+struct ipt_error {
+	struct ipt_entry entry;
+	struct xt_error_target target;
+};
+
+#define IPT_ENTRY_INIT(__size)						       \
+{									       \
+	.target_offset	= sizeof(struct ipt_entry),			       \
+	.next_offset	= (__size),					       \
+}
+
+#define IPT_STANDARD_INIT(__verdict)					       \
+{									       \
+	.entry		= IPT_ENTRY_INIT(sizeof(struct ipt_standard)),	       \
+	.target		= XT_TARGET_INIT(XT_STANDARD_TARGET,		       \
+					 sizeof(struct xt_standard_target)),   \
+	.target.verdict	= -(__verdict) - 1,				       \
+}
+
+#define IPT_ERROR_INIT							       \
+{									       \
+	.entry		= IPT_ENTRY_INIT(sizeof(struct ipt_error)),	       \
+	.target		= XT_TARGET_INIT(XT_ERROR_TARGET,		       \
+					 sizeof(struct xt_error_target)),      \
+	.target.errorname = "ERROR",					       \
+}
+
+extern void *ipt_alloc_initial_table(const struct xt_table *);
+extern unsigned int ipt_do_table(void *priv,
+				 struct sk_buff *skb,
+				 const struct nf_hook_state *state);
+
+#ifdef CONFIG_NETFILTER_XTABLES_COMPAT
+#include <net/compat.h>
+
+struct compat_ipt_entry {
+	struct ipt_ip ip;
+	compat_uint_t nfcache;
+	__u16 target_offset;
+	__u16 next_offset;
+	compat_uint_t comefrom;
+	struct compat_xt_counters counters;
+	unsigned char elems[];
+};
+
+/* Helper functions */
+static inline struct xt_entry_target *
+compat_ipt_get_target(struct compat_ipt_entry *e)
+{
+	return (void *)e + e->target_offset;
+}
+
+#endif /* CONFIG_COMPAT */
+#endif /* _IPTABLES_H */