    /*====================================================================*
     *
     *   Copyright (c) 2013 Qualcomm Atheros, Inc.
     *
     *   All rights reserved.
     *
     *   Redistribution and use in source and binary forms, with or
     *   without modification, are permitted (subject to the limitations
     *   in the disclaimer below) provided that the following conditions
     *   are met:
     *
     *   * Redistributions of source code must retain the above copyright
     *     notice, this list of conditions and the following disclaimer.
     *
     *   * Redistributions in binary form must reproduce the above
     *     copyright notice, this list of conditions and the following
     *     disclaimer in the documentation and/or other materials
     *     provided with the distribution.
     *
     *   * Neither the name of Qualcomm Atheros nor the names of
     *     its contributors may be used to endorse or promote products
     *     derived from this software without specific prior written
     *     permission.
     *
     *   NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE
     *   GRANTED BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE
     *   COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
     *   IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     *   WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     *   PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
     *   OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     *   NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     *   LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     *   HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     *   CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
     *   OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
     *   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     *
     *--------------------------------------------------------------------*/

    /*====================================================================*
     *
     *   efru.c - Ethernet Frame Read Utility
     *
     *   print message header and/or full message content on stdout for
     *   each HomePlugAV or Atheros Vendor Specific message received by
     *   the host;
     *
     *   this program receives raw ethernet frames and so requires root
     *   privileges; if you install it using "chmod 555" and "chown
     *   root:root" then you must login as root to run it; otherwise, you
     *   can install it using "chmod 4555" and "chown root:root" so that
     *   anyone can run it; the program will refuse to run until you get
     *   thing right;
     *
     *   Contributor(s):
     *      Charles Maier <cmaier@qca.qualcomm.com>
     *
     *--------------------------------------------------------------------*/

    /*====================================================================*
     *   system header files;
     *--------------------------------------------------------------------*/

    #include <fcntl.h>
    #include <stdio.h>
    #include <limits.h>
    #include <ctype.h>
    #include <unistd.h>
    #include <stdint.h>
    #include <stdlib.h>
    #include <string.h>
    #include <errno.h>

    #ifdef __linux__
    #include <net/if.h>
    #include <net/if_arp.h>
    #include <netpacket/packet.h>
    #include <signal.h>
    #endif

    /*====================================================================*
     *   custom header files;
     *--------------------------------------------------------------------*/

    #include "../tools/getoptv.h"
    #include "../tools/putoptv.h"
    #include "../tools/memory.h"
    #include "../tools/number.h"
    #include "../tools/types.h"
    #include "../tools/flags.h"
    #include "../tools/error.h"
    #include "../ether/channel.h"
    #include "../plc/plc.h"
    #include "../mme/mme.h"

    /*====================================================================*
     *   custom source files;
     *--------------------------------------------------------------------*/

    #ifndef MAKEFILE
    #include "../tools/getoptv.c"
    #include "../tools/putoptv.c"
    #include "../tools/version.c"
    #include "../tools/hexdump.c"
    #include "../tools/basespec.c"
    #include "../tools/uintspec.c"
    #include "../tools/todigit.c"
    #include "../tools/error.c"
    #endif

    #ifndef MAKEFILE
    #include "../ether/channel.c"
    #include "../ether/openchannel.c"
    #include "../ether/closechannel.c"
    #include "../ether/sendpacket.c"
    #include "../ether/readpacket.c"
    #endif

    /*====================================================================*
     *   program constants;
     *--------------------------------------------------------------------*/

    #define EFRU_VERBOSE (1 << 0)
    #define EFRU_SILENCE (1 << 1)

    #define EFRU_INTERFACE "PLC"
    #define EFRU_ETHERTYPE ETH_P_802_2

    /*====================================================================*
     *
     *   int main (int argc, char * argv[]);
     *
     *
     *--------------------------------------------------------------------*/

    int main (int argc, char const * argv [])

    {
    	extern struct channel channel;
    	struct message message;
    	static char const * optv [] =
    	{
    		"e:i:qt:v",
    		PUTOPTV_S_DIVINE,
    		"Qualcomm Atheros Ethernet Frame Read Utility",
    		"e x\tethertype is (x) [" LITERAL (EFRU_ETHERTYPE) "]",

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

    		"i n\thost interface is (s) [" LITERAL (CHANNEL_ETHNUMBER) "]",

    #else

    		"i s\thost interface is (n) [" LITERAL (CHANNEL_ETHDEVICE) "]",

    #endif

    		"q\tsuppress normal output",
    		"t n\tread timeout is (n) milliseconds [" LITERAL (CHANNEL_FOREVER) "]",
    		"v\tverbose messages on stdout",
    		(char const *) (0)
    	};
    	flag_t flags = (flag_t)(0);
    	signed length;
    	signed c;
    	if (getenv (EFRU_INTERFACE))
    	{

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

    		channel.ifindex = atoi (getenv (EFRU_INTERFACE));

    #else

    		channel.ifname = strdup (getenv (EFRU_INTERFACE));

    #endif

    	}
    	optind = 1;
    	channel.type = EFRU_ETHERTYPE;
    	channel.timeout = CHANNEL_FOREVER;
    	while ((c = getoptv (argc, argv, optv)) != -1)
    	{
    		switch (c)
    		{
    		case 'e':
    			channel.type = (uint16_t)(basespec (optarg, 16, sizeof (channel.type)));
    			break;
    		case 'i':

    #if defined (WIN32)

    			channel.ifindex = atoi (optarg);

    #else

    			channel.ifname = optarg;

    #endif

    			break;
    		case 'q':
    			_setbits (flags, EFRU_SILENCE);
    			break;
    		case 't':
    			channel.timeout = (signed)(uintspec (optarg, 0, UINT_MAX));
    			break;
    		case 'v':
    			_setbits (flags, EFRU_VERBOSE);
    			break;
    		default:
    			break;
    		}
    	}
    	argc -= optind;
    	argv += optind;
    	if (argc)
    	{
    		error (1, ECANCELED, ERROR_TOOMANY);
    	}
    	openchannel (&channel);
    	while ((length = readpacket (&channel, &message, sizeof (message))) >= 0)
    	{
    		hexdump (&message, 0, length, stdout);
    	}
    	closechannel (&channel);
    	return (0);
    }

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