1/*
2 * Copyright (c) 1993, 1994, 1995, 1996, 1997, 1998
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by the Computer Systems
16 *	Engineering Group at Lawrence Berkeley Laboratory.
17 * 4. Neither the name of the University nor of the Laboratory may be used
18 *    to endorse or promote products derived from this software without
19 *    specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#ifdef HAVE_CONFIG_H
35#include "config.h"
36#endif
37
38#include <netdissect-stdinc.h>
39
40#include <pcap.h>
41#include <string.h>
42
43#include "pcap-missing.h"
44#include "ascii_strcasecmp.h"
45
46struct dlt_choice {
47	const char *name;
48	const char *description;
49	int	dlt;
50};
51
52#define DLT_CHOICE(code, description) { #code, description, code }
53#define DLT_CHOICE_SENTINEL { NULL, NULL, 0 }
54
55static struct dlt_choice dlt_choices[] = {
56	DLT_CHOICE(DLT_NULL, "BSD loopback"),
57	DLT_CHOICE(DLT_EN10MB, "Ethernet"),
58	DLT_CHOICE(DLT_IEEE802, "Token ring"),
59	DLT_CHOICE(DLT_ARCNET, "ARCNET"),
60	DLT_CHOICE(DLT_SLIP, "SLIP"),
61	DLT_CHOICE(DLT_PPP, "PPP"),
62	DLT_CHOICE(DLT_FDDI, "FDDI"),
63	DLT_CHOICE(DLT_ATM_RFC1483, "RFC 1483 IP-over-ATM"),
64	DLT_CHOICE(DLT_RAW, "Raw IP"),
65#ifdef DLT_SLIP_BSDOS
66	DLT_CHOICE(DLT_SLIP_BSDOS, "BSD/OS SLIP"),
67#endif
68#ifdef DLT_PPP_BSDOS
69	DLT_CHOICE(DLT_PPP_BSDOS, "BSD/OS PPP"),
70#endif
71#ifdef DLT_ATM_CLIP
72	DLT_CHOICE(DLT_ATM_CLIP, "Linux Classical IP-over-ATM"),
73#endif
74#ifdef DLT_PPP_SERIAL
75	DLT_CHOICE(DLT_PPP_SERIAL, "PPP over serial"),
76#endif
77#ifdef DLT_PPP_ETHER
78	DLT_CHOICE(DLT_PPP_ETHER, "PPPoE"),
79#endif
80#ifdef DLT_C_HDLC
81	DLT_CHOICE(DLT_C_HDLC, "Cisco HDLC"),
82#endif
83#ifdef DLT_IEEE802_11
84	DLT_CHOICE(DLT_IEEE802_11, "802.11"),
85#endif
86#ifdef DLT_FRELAY
87	DLT_CHOICE(DLT_FRELAY, "Frame Relay"),
88#endif
89#ifdef DLT_LOOP
90	DLT_CHOICE(DLT_LOOP, "OpenBSD loopback"),
91#endif
92#ifdef DLT_ENC
93	DLT_CHOICE(DLT_ENC, "OpenBSD encapsulated IP"),
94#endif
95#ifdef DLT_LINUX_SLL
96	DLT_CHOICE(DLT_LINUX_SLL, "Linux cooked"),
97#endif
98#ifdef DLT_LTALK
99	DLT_CHOICE(DLT_LTALK, "Localtalk"),
100#endif
101#ifdef DLT_PFLOG
102	DLT_CHOICE(DLT_PFLOG, "OpenBSD pflog file"),
103#endif
104#ifdef DLT_PRISM_HEADER
105	DLT_CHOICE(DLT_PRISM_HEADER, "802.11 plus Prism header"),
106#endif
107#ifdef DLT_IP_OVER_FC
108	DLT_CHOICE(DLT_IP_OVER_FC, "RFC 2625 IP-over-Fibre Channel"),
109#endif
110#ifdef DLT_SUNATM
111	DLT_CHOICE(DLT_SUNATM, "Sun raw ATM"),
112#endif
113#ifdef DLT_IEEE802_11_RADIO
114	DLT_CHOICE(DLT_IEEE802_11_RADIO, "802.11 plus radio information header"),
115#endif
116#ifdef DLT_ARCNET_LINUX
117	DLT_CHOICE(DLT_ARCNET_LINUX, "Linux ARCNET"),
118#endif
119#ifdef DLT_LINUX_IRDA
120	DLT_CHOICE(DLT_LINUX_IRDA, "Linux IrDA"),
121#endif
122#ifdef DLT_LANE8023
123	DLT_CHOICE(DLT_LANE8023, "Linux 802.3 LANE"),
124#endif
125#ifdef DLT_CIP
126	DLT_CHOICE(DLT_CIP, "Linux Classical IP-over-ATM"),
127#endif
128#ifdef DLT_HDLC
129	DLT_CHOICE(DLT_HDLC, "Cisco HDLC"),
130#endif
131	DLT_CHOICE_SENTINEL
132};
133
134#ifndef HAVE_PCAP_DATALINK_NAME_TO_VAL
135int
136pcap_datalink_name_to_val(const char *name)
137{
138	int i;
139
140	for (i = 0; dlt_choices[i].name != NULL; i++) {
141		if (ascii_strcasecmp(dlt_choices[i].name + sizeof("DLT_") - 1,
142		    name) == 0)
143			return (dlt_choices[i].dlt);
144	}
145	return (-1);
146}
147
148const char *
149pcap_datalink_val_to_name(int dlt)
150{
151	int i;
152
153	for (i = 0; dlt_choices[i].name != NULL; i++) {
154		if (dlt_choices[i].dlt == dlt)
155			return (dlt_choices[i].name + sizeof("DLT_") - 1);
156	}
157	return (NULL);
158}
159#endif
160
161const char *
162pcap_datalink_val_to_description(int dlt)
163{
164	int i;
165
166	for (i = 0; dlt_choices[i].name != NULL; i++) {
167		if (dlt_choices[i].dlt == dlt)
168			return (dlt_choices[i].description);
169	}
170	return (NULL);
171}
172