xref: /freebsd/contrib/tcpdump/missing/datalinks.c (revision 8d20be1e22095c27faf8fe8b2f0d089739cc742e)
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 #ifndef lint
35 static const char rcsid[] _U_ =
36     "@(#) $Header: /tcpdump/master/tcpdump/missing/datalinks.c,v 1.3 2003-11-16 09:36:47 guy Exp $ (LBL)";
37 #endif
38 
39 #ifdef HAVE_CONFIG_H
40 #include "config.h"
41 #endif
42 
43 #include <tcpdump-stdinc.h>
44 
45 #include <pcap.h>
46 #include <stdlib.h>
47 #include <stdio.h>
48 
49 #include "pcap-missing.h"
50 
51 /*
52  * Stub versions for platforms that don't support them.
53  */
54 int
55 pcap_list_datalinks(pcap_t *p, int **dlt_buffer)
56 {
57 	/*
58 	 * This platform doesn't support changing the DLT for an
59 	 * interface.  Return a list of DLTs containing only the
60 	 * DLT this device supports.
61 	 */
62 	*dlt_buffer = (int*)malloc(sizeof(**dlt_buffer));
63 	if (*dlt_buffer == NULL)
64 		return (-1);
65 	**dlt_buffer = pcap_datalink(p);
66 	return (1);
67 }
68