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 1.11 2000-06-26 05:12:11 assar Exp $ (LBL)";
  24 #endif
  25
  26 #include <sys/param.h>                  /* optionally get BSD define */
  27
  28 #include <string.h>
  29
  30 #include "gnuc.h"
  31 #ifdef HAVE_OS_PROTO_H
  32 #include "os-proto.h"
  33 #endif
  34
  35 #include "pcap-int.h"
  36
  37 static char nosup[] = "live packet capture not supported on this system";
  38
  39 int
  40 pcap_stats(pcap_t *p, struct pcap_stat *ps)
  41 {
  42         (void)snprintf(p->errbuf, sizeof(p->errbuf), "pcap_stats: %s", nosup);
  43         return (-1);
  44 }
  45
  46 int
  47 pcap_read(pcap_t *p, int cnt, pcap_handler callback, u_char *user)
  48 {
  49         (void)snprintf(p->errbuf, sizeof(p->errbuf), "pcap_read: %s", nosup);
  50         return (-1);
  51 }
  52
  53 pcap_t *
  54 pcap_open_live(char *device, int snaplen, int promisc, int to_ms, char *ebuf)
  55 {
  56         (void)strlcpy(ebuf, nosup, PCAP_ERRBUF_SIZE);
  57         return (NULL);
  58 }
  59
  60 int
  61 pcap_setfilter(pcap_t *p, struct bpf_program *fp)
  62 {
  63         if (p->sf.rfile == NULL) {
  64                 (void)snprintf(p->errbuf, sizeof(p->errbuf),
  65                     "pcap_setfilter: %s", nosup);
  66                 return (-1);
  67         }
  68         p->fcode = *fp;
  69         return (0);
  70 }