diff --git a/bgpd/bgp_aspath.h b/bgpd/bgp_aspath.h
new file mode 100644
index 0000000..0295faf
--- /dev/null
+++ b/bgpd/bgp_aspath.h
@@ -0,0 +1,77 @@
+/* AS path related definitions.
+   Copyright (C) 1997, 98, 99 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.  */
+
+/* AS path segment type.  */
+#define AS_SET                       1
+#define AS_SEQUENCE                  2
+#define AS_CONFED_SEQUENCE           3
+#define AS_CONFED_SET                4
+
+/* Private AS range defined in RFC2270.  */
+#define BGP_PRIVATE_AS_MIN       64512
+#define BGP_PRIVATE_AS_MAX       65535
+
+/* AS path may be include some AsSegments.  */
+struct aspath 
+{
+  /* Reference count to this aspath.  */
+  unsigned long refcnt;
+
+  /* Rawdata length.  */
+  int length;
+
+  /* AS count.  */
+  int count;
+
+  /* Rawdata.  */
+  caddr_t data;
+
+  /* String expression of AS path.  This string is used by vty output
+     and AS path regular expression match.  */
+  char *str;
+};
+
+#define ASPATH_STR_DEFAULT_LEN 32
+
+/* Prototypes. */
+void aspath_init ();
+struct aspath *aspath_parse ();
+struct aspath *aspath_dup (struct aspath *);
+struct aspath *aspath_aggregate (struct aspath *, struct aspath *);
+struct aspath *aspath_prepend (struct aspath *, struct aspath *);
+struct aspath *aspath_add_seq (struct aspath *, as_t);
+struct aspath *aspath_add_confed_seq (struct aspath *, as_t);
+int aspath_cmp_left (struct aspath *, struct aspath *);
+int aspath_cmp_left_confed (struct aspath *, struct aspath *);
+struct aspath *aspath_delete_confed_seq (struct aspath *);
+struct aspath *aspath_empty ();
+struct aspath *aspath_empty_get ();
+struct aspath *aspath_str2aspath (char *);
+void aspath_free (struct aspath *);
+struct aspath *aspath_intern (struct aspath *);
+void aspath_unintern (struct aspath *);
+const char *aspath_print (struct aspath *);
+void aspath_print_vty (struct vty *, struct aspath *);
+void aspath_print_all_vty (struct vty *);
+unsigned int aspath_key_make (struct aspath *);
+int aspath_loop_check (struct aspath *, as_t);
+int aspath_private_as_check (struct aspath *);
+int aspath_firstas_check (struct aspath *, as_t);
+unsigned long aspath_count ();