diff --git a/missing/dlnames.c b/missing/dlnames.c
new file mode 100644
index 0000000..f4f583e
--- /dev/null
+++ b/missing/dlnames.c
@@ -0,0 +1,175 @@
+/*
+ * Copyright (c) 1993, 1994, 1995, 1996, 1997, 1998
+ *	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 the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the Computer Systems
+ *	Engineering Group at Lawrence Berkeley Laboratory.
+ * 4. Neither the name of the University nor of the Laboratory may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static const char rcsid[] _U_ =
+    "@(#) $Header: /tcpdump/master/tcpdump/missing/dlnames.c,v 1.5 2003/11/18 23:09:43 guy Exp $ (LBL)";
+#endif
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <tcpdump-stdinc.h>
+
+#include <pcap.h>
+#include <string.h>
+
+#include "pcap-missing.h"
+
+struct dlt_choice {
+	const char *name;
+	const char *description;
+	int	dlt;
+};
+
+#define DLT_CHOICE(code, description) { #code, description, code }
+#define DLT_CHOICE_SENTINEL { NULL, NULL, 0 }
+
+static struct dlt_choice dlt_choices[] = {
+	DLT_CHOICE(DLT_NULL, "BSD loopback"),
+	DLT_CHOICE(DLT_EN10MB, "Ethernet"),
+	DLT_CHOICE(DLT_IEEE802, "Token ring"),
+	DLT_CHOICE(DLT_ARCNET, "ARCNET"),
+	DLT_CHOICE(DLT_SLIP, "SLIP"),
+	DLT_CHOICE(DLT_PPP, "PPP"),
+	DLT_CHOICE(DLT_FDDI, "FDDI"),
+	DLT_CHOICE(DLT_ATM_RFC1483, "RFC 1483 IP-over-ATM"),
+	DLT_CHOICE(DLT_RAW, "Raw IP"),
+#ifdef DLT_SLIP_BSDOS
+	DLT_CHOICE(DLT_SLIP_BSDOS, "BSD/OS SLIP"),
+#endif
+#ifdef DLT_PPP_BSDOS
+	DLT_CHOICE(DLT_PPP_BSDOS, "BSD/OS PPP"),
+#endif
+#ifdef DLT_ATM_CLIP
+	DLT_CHOICE(DLT_ATM_CLIP, "Linux Classical IP-over-ATM"),
+#endif
+#ifdef DLT_PPP_SERIAL
+	DLT_CHOICE(DLT_PPP_SERIAL, "PPP over serial"),
+#endif
+#ifdef DLT_PPP_ETHER
+	DLT_CHOICE(DLT_PPP_ETHER, "PPPoE"),
+#endif
+#ifdef DLT_C_HDLC
+	DLT_CHOICE(DLT_C_HDLC, "Cisco HDLC"),
+#endif
+#ifdef DLT_IEEE802_11
+	DLT_CHOICE(DLT_IEEE802_11, "802.11"),
+#endif
+#ifdef DLT_FRELAY
+	DLT_CHOICE(DLT_FRELAY, "Frame Relay"),
+#endif
+#ifdef DLT_LOOP
+	DLT_CHOICE(DLT_LOOP, "OpenBSD loopback"),
+#endif
+#ifdef DLT_ENC
+	DLT_CHOICE(DLT_ENC, "OpenBSD encapsulated IP"),
+#endif
+#ifdef DLT_LINUX_SLL
+	DLT_CHOICE(DLT_LINUX_SLL, "Linux cooked"),
+#endif
+#ifdef DLT_LTALK
+	DLT_CHOICE(DLT_LTALK, "Localtalk"),
+#endif
+#ifdef DLT_PFLOG
+	DLT_CHOICE(DLT_PFLOG, "OpenBSD pflog file"),
+#endif
+#ifdef DLT_PRISM_HEADER
+	DLT_CHOICE(DLT_PRISM_HEADER, "802.11 plus Prism header"),
+#endif
+#ifdef DLT_IP_OVER_FC
+	DLT_CHOICE(DLT_IP_OVER_FC, "RFC 2625 IP-over-Fibre Channel"),
+#endif
+#ifdef DLT_SUNATM
+	DLT_CHOICE(DLT_SUNATM, "Sun raw ATM"),
+#endif
+#ifdef DLT_IEEE802_11_RADIO
+	DLT_CHOICE(DLT_IEEE802_11_RADIO, "802.11 plus radio information header"),
+#endif
+#ifdef DLT_ARCNET_LINUX
+	DLT_CHOICE(DLT_ARCNET_LINUX, "Linux ARCNET"),
+#endif
+#ifdef DLT_LINUX_IRDA
+	DLT_CHOICE(DLT_LINUX_IRDA, "Linux IrDA"),
+#endif
+#ifdef DLT_LANE8023
+	DLT_CHOICE(DLT_LANE8023, "Linux 802.3 LANE"),
+#endif
+#ifdef DLT_CIP
+	DLT_CHOICE(DLT_CIP, "Linux Classical IP-over-ATM"),
+#endif
+#ifdef DLT_HDLC
+	DLT_CHOICE(DLT_HDLC, "Cisco HDLC"),
+#endif
+	DLT_CHOICE_SENTINEL
+};
+
+#ifndef HAVE_PCAP_DATALINK_NAME_TO_VAL
+int
+pcap_datalink_name_to_val(const char *name)
+{
+	int i;
+
+	for (i = 0; dlt_choices[i].name != NULL; i++) {
+		if (strcasecmp(dlt_choices[i].name + sizeof("DLT_") - 1,
+		    name) == 0)
+			return (dlt_choices[i].dlt);
+	}
+	return (-1);
+}
+
+const char *
+pcap_datalink_val_to_name(int dlt)
+{
+	int i;
+
+	for (i = 0; dlt_choices[i].name != NULL; i++) {
+		if (dlt_choices[i].dlt == dlt)
+			return (dlt_choices[i].name + sizeof("DLT_") - 1);
+	}
+	return (NULL);
+}
+#endif
+
+const char *
+pcap_datalink_val_to_description(int dlt)
+{
+	int i;
+
+	for (i = 0; dlt_choices[i].name != NULL; i++) {
+		if (dlt_choices[i].dlt == dlt)
+			return (dlt_choices[i].description);
+	}
+	return (NULL);
+}