xref: /freebsd/contrib/libpcap/pcap-null.c (revision 6990ffd8a95caaba6858ad44ff1b3157d1efba8f)
1 /*
2  * Copyright (c) 1994, 1995, 1996
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: (1) source code distributions
7  * retain the above copyright notice and this paragraph in its entirety, (2)
8  * distributions including binary code include the above copyright notice and
9  * this paragraph in its entirety in the documentation or other materials
10  * provided with the distribution, and (3) all advertising materials mentioning
11  * features or use of this software display the following acknowledgement:
12  * ``This product includes software developed by the University of California,
13  * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
14  * the University nor the names of its contributors may be used to endorse
15  * or promote products derived from this software without specific prior
16  * written permission.
17  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
18  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
19  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
20  */
21 #ifndef lint
22 static const char rcsid[] =
23     "@(#) $Header: /tcpdump/master/libpcap/pcap-null.c,v 1.13 2000/10/28 00:01:29 guy Exp $ (LBL)";
24 #endif
25 
26 #ifdef HAVE_CONFIG_H
27 #include "config.h"
28 #endif
29 
30 #include <sys/param.h>			/* optionally get BSD define */
31 
32 #include <string.h>
33 
34 #ifdef HAVE_OS_PROTO_H
35 #include "os-proto.h"
36 #endif
37 
38 #include "pcap-int.h"
39 
40 static char nosup[] = "live packet capture not supported on this system";
41 
42 int
43 pcap_stats(pcap_t *p, struct pcap_stat *ps)
44 {
45 	(void)snprintf(p->errbuf, sizeof(p->errbuf), "pcap_stats: %s", nosup);
46 	return (-1);
47 }
48 
49 int
50 pcap_read(pcap_t *p, int cnt, pcap_handler callback, u_char *user)
51 {
52 	(void)snprintf(p->errbuf, sizeof(p->errbuf), "pcap_read: %s", nosup);
53 	return (-1);
54 }
55 
56 pcap_t *
57 pcap_open_live(char *device, int snaplen, int promisc, int to_ms, char *ebuf)
58 {
59 	(void)strlcpy(ebuf, nosup, PCAP_ERRBUF_SIZE);
60 	return (NULL);
61 }
62 
63 int
64 pcap_setfilter(pcap_t *p, struct bpf_program *fp)
65 {
66 	if (p->sf.rfile == NULL) {
67 		(void)snprintf(p->errbuf, sizeof(p->errbuf),
68 		    "pcap_setfilter: %s", nosup);
69 		return (-1);
70 	}
71 	if (install_bpf_program(p, fp) < 0)
72 		return (-1);
73 	return (0);
74 }
75