Initial revision
diff --git a/lib/filter.h b/lib/filter.h
new file mode 100644
index 0000000..077ac2f
--- /dev/null
+++ b/lib/filter.h
@@ -0,0 +1,67 @@
+/*
+ * Route filtering function.
+ * Copyright (C) 1998 Kunihiro Ishiguro
+ *
+ * This file is part of GNU Zebra.
+ *
+ * GNU Zebra is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published
+ * by the Free Software Foundation; either version 2, or (at your
+ * option) any later version.
+ *
+ * GNU Zebra is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Zebra; see the file COPYING. If not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifndef _ZEBRA_FILTER_H
+#define _ZEBRA_FILTER_H
+
+#include "if.h"
+
+/* Filter type is made by `permit', `deny' and `dynamic'. */
+enum filter_type
+{
+ FILTER_DENY,
+ FILTER_PERMIT,
+ FILTER_DYNAMIC
+};
+
+enum access_type
+{
+ ACCESS_TYPE_STRING,
+ ACCESS_TYPE_NUMBER
+};
+
+/* Access list */
+struct access_list
+{
+ char *name;
+ char *remark;
+
+ struct access_master *master;
+
+ enum access_type type;
+
+ struct access_list *next;
+ struct access_list *prev;
+
+ struct filter *head;
+ struct filter *tail;
+};
+
+/* Prototypes for access-list. */
+void access_list_init (void);
+void access_list_reset (void);
+void access_list_add_hook (void (*func)(struct access_list *));
+void access_list_delete_hook (void (*func)(struct access_list *));
+struct access_list *access_list_lookup (afi_t, char *);
+enum filter_type access_list_apply (struct access_list *, void *);
+
+#endif /* _ZEBRA_FILTER_H */