1 files changed, 79 insertions, 0 deletions
diff --git a/include/linux/netfilter_arp/arp_tables.h b/include/linux/netfilter_arp/arp_tables.h
new file mode 100644
index 000000000..a40aaf645
--- /dev/null
+++ b/include/linux/netfilter_arp/arp_tables.h
@@ -0,0 +1,79 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * 	Format of an ARP firewall descriptor
+ *
+ * 	src, tgt, src_mask, tgt_mask, arpop, arpop_mask are always stored in
+ *	network byte order.
+ * 	flags are stored in host byte order (of course).
+ */
+#ifndef _ARPTABLES_H
+#define _ARPTABLES_H
+
+#include <linux/if.h>
+#include <linux/in.h>
+#include <linux/if_arp.h>
+#include <linux/skbuff.h>
+#include <uapi/linux/netfilter_arp/arp_tables.h>
+
+/* Standard entry. */
+struct arpt_standard {
+	struct arpt_entry entry;
+	struct xt_standard_target target;
+};
+
+struct arpt_error {
+	struct arpt_entry entry;
+	struct xt_error_target target;
+};
+
+#define ARPT_ENTRY_INIT(__size)						       \
+{									       \
+	.target_offset	= sizeof(struct arpt_entry),			       \
+	.next_offset	= (__size),					       \
+}
+
+#define ARPT_STANDARD_INIT(__verdict)					       \
+{									       \
+	.entry		= ARPT_ENTRY_INIT(sizeof(struct arpt_standard)),       \
+	.target		= XT_TARGET_INIT(XT_STANDARD_TARGET,		       \
+					 sizeof(struct xt_standard_target)), \
+	.target.verdict	= -(__verdict) - 1,				       \
+}
+
+#define ARPT_ERROR_INIT							       \
+{									       \
+	.entry		= ARPT_ENTRY_INIT(sizeof(struct arpt_error)),	       \
+	.target		= XT_TARGET_INIT(XT_ERROR_TARGET,		       \
+					 sizeof(struct xt_error_target)),      \
+	.target.errorname = "ERROR",					       \
+}
+
+extern void *arpt_alloc_initial_table(const struct xt_table *);
+int arpt_register_table(struct net *net, const struct xt_table *table,
+			const struct arpt_replace *repl,
+			const struct nf_hook_ops *ops);
+void arpt_unregister_table(struct net *net, const char *name);
+void arpt_unregister_table_pre_exit(struct net *net, const char *name);
+extern unsigned int arpt_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_arpt_entry {
+	struct arpt_arp arp;
+	__u16 target_offset;
+	__u16 next_offset;
+	compat_uint_t comefrom;
+	struct compat_xt_counters counters;
+	unsigned char elems[];
+};
+
+static inline struct xt_entry_target *
+compat_arpt_get_target(struct compat_arpt_entry *e)
+{
+	return (void *)e + e->target_offset;
+}
+
+#endif /* CONFIG_COMPAT */
+#endif /* _ARPTABLES_H */