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

/*====================================================================*
 *
 *   edeu.c - Ethernet Frame Echo Utility
 *   
 *   Listen for incoming Ethernet II frames and write frame data to 
 *   stdout as a continuous binary data stream. Since frame data can 
 *   contain anything, users should send program output to a file or 
 *   pipe it through a filter program to prevent corruption of the 
 *   terminal session. If all incoming data is ASCII then directing 
 *   stdout to the console should not cause any problems.
 *   
 *   this program can be used as a data target when testing AR6405
 *   UART applications; use program edsu to send files from a remote
 *   host and this program to display or save them;
 *
 *   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"

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

#ifndef MAKEFILE
#include "../tools/getoptv.c"
#include "../tools/putoptv.c"
#include "../tools/version.c"
#include "../tools/hexdump.c"
#include "../tools/hexdecode.c"
#include "../tools/hexstring.c"
#include "../tools/uintspec.c"
#include "../tools/memswap.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 EFEU_INTERFACE "PLC"
#define EFEU_ETHERTYPE ETH_P_802_2

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

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

{ 
	extern struct channel channel; 
	struct ethernet_frame frame; 
	signed length; 
	static char const * optv [] = 
	{ 
		"e:i:qt:v", 
		PUTOPTV_S_DIVINE, 
		"Qualcomm Atheros Ethernet Frame Echo Utility", 
		"e x\tethertype is (x) [" LITERAL (EFEU_ETHERTYPE) "]", 

#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

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

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

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

#else

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

#endif

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

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

			channel.ifindex = atoi (optarg); 

#else

			channel.ifname = optarg; 

#endif

			break; 
		case 'q': 
			_setbits (channel.flags, CHANNEL_SILENCE); 
			break; 
		case 't': 
			channel.timeout = (signed) (uintspec (optarg, 0, UINT_MAX)); 
			break; 
		case 'v': 
			_setbits (channel.flags, CHANNEL_VERBOSE); 
			break; 
		default: 
			break; 
		} 
	} 
	argc -= optind; 
	argv += optind; 
	if (argc) 
	{ 
		error (1, ECANCELED, ERROR_TOOMANY); 
	} 
	openchannel (& channel); 
	while ((length = readpacket (& channel, & frame, sizeof (frame))) > 0) 
	{ 
		memswap (& frame.frame_dhost, & frame.frame_shost, sizeof (frame.frame_dhost)); 
		if (sendpacket (& channel, & frame, length) != length) 
		{ 
			error (1, errno, CHANNEL_CANTSEND); 
		} 
	} 
	closechannel (& channel); 
	return (0); 
}