diff --git a/addrtoname.h b/addrtoname.h
new file mode 100644
index 0000000..67ded6e
--- /dev/null
+++ b/addrtoname.h
@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 1990, 1992, 1993, 1994, 1995, 1996, 1997
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that: (1) source code distributions
+ * retain the above copyright notice and this paragraph in its entirety, (2)
+ * distributions including binary code include the above copyright notice and
+ * this paragraph in its entirety in the documentation or other materials
+ * provided with the distribution, and (3) all advertising materials mentioning
+ * features or use of this software display the following acknowledgement:
+ * ``This product includes software developed by the University of California,
+ * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
+ * the University nor the names of its contributors may be used to endorse
+ * or promote products derived from this software without specific prior
+ * written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * @(#) $Header: /tcpdump/master/tcpdump/addrtoname.h,v 1.18 2001/09/17 21:57:51 fenner Exp $ (LBL)
+ */
+
+/* Name to address translation routines. */
+
+extern const char *linkaddr_string(const u_char *, const unsigned int);
+extern const char *etheraddr_string(const u_char *);
+extern const char *etherproto_string(u_short);
+extern const char *tcpport_string(u_short);
+extern const char *udpport_string(u_short);
+extern const char *getname(const u_char *);
+#ifdef INET6
+extern const char *getname6(const u_char *);
+#endif
+extern const char *intoa(u_int32_t);
+
+extern void init_addrtoname(u_int32_t, u_int32_t);
+extern struct hnamemem *newhnamemem(void);
+#ifdef INET6
+extern struct h6namemem *newh6namemem(void);
+#endif
+
+#define ipaddr_string(p) getname((const u_char *)(p))
+#ifdef INET6
+#define ip6addr_string(p) getname6((const u_char *)(p))
+#endif