Home | History | Annotate | Download | only in libpcap
      1 /* -*- Mode: c; tab-width: 8; indent-tabs-mode: 1; c-basic-offset: 8; -*- */
      2 /*
      3  * Copyright (c) 1994, 1995, 1996, 1997, 1998
      4  *	The Regents of the University of California.  All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  * 3. All advertising materials mentioning features or use of this software
     15  *    must display the following acknowledgement:
     16  *	This product includes software developed by the Computer Systems
     17  *	Engineering Group at Lawrence Berkeley Laboratory.
     18  * 4. Neither the name of the University nor of the Laboratory may be used
     19  *    to endorse or promote products derived from this software without
     20  *    specific prior written permission.
     21  *
     22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     32  * SUCH DAMAGE.
     33  */
     34 
     35 #ifndef lint
     36 static const char rcsid[] _U_ =
     37     "@(#) $Header: /tcpdump/master/libpcap/fad-null.c,v 1.2 2003/11/15 23:23:58 guy Exp $ (LBL)";
     38 #endif
     39 
     40 #ifdef HAVE_CONFIG_H
     41 #include "config.h"
     42 #endif
     43 
     44 #include <pcap.h>
     45 
     46 /*
     47  * Get a list of all interfaces that are up and that we can open.
     48  * Returns -1 on error, 0 otherwise.
     49  * The list, as returned through "alldevsp", may be null if no interfaces
     50  * were up and could be opened.
     51  *
     52  * This is the implementation used on platforms that have no support for
     53  * packet capture.
     54  */
     55 int
     56 pcap_findalldevs(pcap_if_t **alldevsp, char *errbuf)
     57 {
     58 	/*
     59 	 * Succeed, but don't return any interfaces; we return only those
     60 	 * we can open, and we can't open any if there's no support
     61 	 * for packet capture.
     62 	 */
     63 	*alldevsp = NULL;
     64 	return (0);
     65 }
     66