edsu.c
Author: cmaier@cmassoc.net

    /*====================================================================*
     *
     *   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.
     *
     *--------------------------------------------------------------------*/

    /*====================================================================*
     *
     *   edsu.c - Qualcomm Atheros Ethernet II Data Send Utility
     *
     *   send one or more files over Ethernet using IEEE 802.2 Ethernet
     *   Frames;
     *
     *   this program can be used as a data source when testing AR6405
     *   UART applications; use this program to send files and program
     *   edru to read and display or save them at the other end;
     *
     *
     *   Contributor(s):
     *      Charles Maier <cmaier@qca.qualcomm.com>
     *
     *--------------------------------------------------------------------*/

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

    #include <stdlib.h>
    #include <limits.h>
    #include <memory.h>
    #include <signal.h>
    #include <unistd.h>

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

    #include "../tools/getoptv.h"
    #include "../tools/putoptv.h"
    #include "../tools/memory.h"
    #include "../tools/number.h"
    #include "../tools/error.h"
    #include "../tools/files.h"
    #include "../tools/flags.h"
    #include "../ether/ether.h"
    #include "../ether/channel.h"

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

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

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

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

    #define EDSU_INTERFACE "PLC"
    #define EDSU_ETHERTYPE ETH_P_802_2
    #define EDSU_PAUSE 0

    /*====================================================================*
     *
     *   signed function (struct channel * channel, unsigned pause, signed fd);
     *
     *   read a file and transmit it over network as a stream of Ethernet
     *   frames; pause between frames to prevent over-loading the remote
     *   host;
     *
     *
     *--------------------------------------------------------------------*/

    signed function (struct channel * channel, unsigned pause, signed fd)

    {
    	struct ethernet_frame frame;
    	signed length = sizeof (frame.frame_data);
    	memcpy (frame.frame_dhost, channel->peer, sizeof (frame.frame_dhost));
    	memcpy (frame.frame_shost, channel->host, sizeof (frame.frame_shost));
    	while ((length = read (fd, frame.frame_data, sizeof (frame.frame_data))) > 0)
    	{
    		frame.frame_type = htons (length);
    		if (length < ETHERMIN)
    		{
    			length = ETHERMIN;
    		}
    		length += ETHER_HDR_LEN;
    		if (sendpacket (channel, &frame, length) < 0)
    		{
    			error (1, errno, CHANNEL_CANTSEND);
    		}
    		sleep (pause);
    	}
    	return (0);
    }

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

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

    {
    	extern struct channel channel;
    	static char const * optv [] =
    	{
    		"e:d:i:p:qv",
    		"file [file] [...]",
    		"Qualcomm Atheros Ethernet II Data Send Utility",
    		"e x\tethertype is (x) [" LITERAL (EDSU_ETHERTYPE) "]",
    		"d x\tdestination address is (x) [00:B0:52:00:00:01]",

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

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

    #else

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

    #endif

    		"p n\tpause (n) seconds between frames [" LITERAL (EDSU_PAUSE) "]",
    		"q\tquiet mode",
    		"v\tverbose mode",
    		(char const *)(0)
    	};
    	unsigned pause = EDSU_PAUSE;
    	signed c;
    	if (getenv (EDSU_INTERFACE))
    	{

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

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

    #else

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

    #endif

    	}
    	channel.type = EDSU_ETHERTYPE;
    	while ((c = getoptv (argc, argv, optv)) != -1)
    	{
    		switch (c)
    		{
    		case 'e':
    			channel.type = (uint16_t)(basespec (optarg, 16, sizeof (channel.type)));
    			break;
    		case 'd':
    			if (!hexencode (channel.peer, sizeof (channel.peer), optarg))
    			{
    				error (1, errno, "%s", optarg);
    			}
    			break;
    		case 'i':

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

    			channel.ifindex = atoi (optarg);

    #else

    			channel.ifname = optarg;

    #endif

    			break;
    		case 'p':
    			pause = (unsigned)(uintspec (optarg, 0, UCHAR_MAX));
    			break;
    		case 'q':
    			_setbits (channel.flags, CHANNEL_SILENCE);
    			break;
    		case 'v':
    			_setbits (channel.flags, CHANNEL_VERBOSE);
    			break;
    		default:
    			break;
    		}
    	}
    	argc -= optind;
    	argv += optind;
    	openchannel (&channel);
    	if (!argc)
    	{
    		function (&channel, pause, STDIN_FILENO);
    	}
    	while ((argc) && (* argv))
    	{
    		if (efreopen (* argv, "rb", stdin))
    		{
    			function (&channel, pause, fileno (stdin));
    		}
    		argc--;
    		argv++;
    	}
    	closechannel (&channel);
    	exit (0);
    }

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