The Tcpdump Group git mirrors - libpcap/blob - pcap-null.c

   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 }