csu3_am335x/EVSE/GPL/plc-utils.LNX.2.1.20/source/ether/pcap_nameindex.c

/*====================================================================*
*
*   Copyright (c) 2013 Qualcomm Atheros, Inc.
*
*   All rights reserved.
*
*====================================================================*/

/*====================================================================*
 *
 *   struct if_nameindex * pcap_nameindex (void) 
 *
 *   ether.h
 *
 *   a WinPcap version of POSIX if_nameindex function; return error
 *   in non-pcap environments;
 *
 *   see The Open Group Base Specifications Issue 6 IEEE Std 1003.1, 
 *   2004 Edition for a description of this function;
 *
 *--------------------------------------------------------------------*/

#ifndef PCAP_NAMEINDEX_SOURCE
#define PCAP_NAMEINDEX_SOURCE

#include <pcap.h>
#include <string.h>
#include <stdlib.h>

#include "../ether/ether.h"

struct if_nameindex * pcap_nameindex (void) 

{ 

#if defined (WINPCAP) || defined (LIBPCAP)

	char buffer [PCAP_ERRBUF_SIZE]; 
	pcap_if_t * devices = (pcap_if_t *) (0); 
	pcap_if_t * device; 
	if (pcap_findalldevs (& devices, buffer) != - 1) 
	{ 
		struct if_nameindex * ifs; 
		struct if_nameindex * ifp; 
		unsigned count = 1; 
		for (device = devices; device; device = device->next) 
		{ 
			count++; 
		} 
		ifp = ifs = (struct if_nameindex *) (malloc (count * sizeof (struct if_nameindex))); 
		if (ifs) for (device = devices; device; device = device->next) 
		{ 
			ifp->if_index = device->index; 
			ifp->if_name = strdup (device->name); 
			ifp++; 
		} 
		memset (ifp, 0, sizeof (* ifp)); 
		pcap_freealldevs (devices); 
		return (ifs); 
	} 

#endif

	return ((struct if_nameindex *) (0)); 
} 

#endif