csu3_am335x/EVSE/GPL/open-plc-utils-0.3/plc/Transmit.c

/*====================================================================*
 *
 *   Copyright (c) 2013 Qualcomm Atheros, Inc.
 *
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 *   without modification, are permitted (subject to the limitations
 *   in the disclaimer below) provided that the following conditions
 *   are met:
 *
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 *     notice, this list of conditions and the following disclaimer.
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 *     copyright notice, this list of conditions and the following
 *     disclaimer in the documentation and/or other materials
 *     provided with the distribution.
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 *   * 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
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 *   GRANTED BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE
 *   COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
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 *--------------------------------------------------------------------*/

/*====================================================================*
 *
 *   signed Transmit (struct plc * plc, byte source [], byte target []) ;
 *
 *   send TCP/IP frames to a remote powerline device to establish
 *   the source device TX PHY rate and remote device RX PHY rate;
 *
 *--------------------------------------------------------------------*/

#ifndef TRANSMIT_SOURCE
#define TRANSMIT_SOURCE

#include <memory.h>
#include <errno.h>
#include <sys/time.h>

#include "../tools/error.h"
#include "../tools/flags.h"
#include "../tools/types.h"
#include "../tools/timer.h"
#include "../plc/plc.h"

signed Transmit (struct plc * plc, byte source [], byte target [])

{
	struct channel * channel = (struct channel *)(plc->channel);
	struct message * message = (struct message *)(plc->message);
	struct timeval ts;
	struct timeval tc;
	unsigned timer = 0;
	if (_allclr (plc->flags, PLC_SILENCE))
	{
		char sourcename [ETHER_ADDR_LEN * 3];
		char targetname [ETHER_ADDR_LEN * 3];
		hexdecode (source, ETHER_ADDR_LEN, sourcename, sizeof (sourcename));
		hexdecode (target, ETHER_ADDR_LEN, targetname, sizeof (targetname));
		fprintf (stderr, "%s %s %s\n", channel->ifname, sourcename, targetname);
	}
	memset (message, 0xA5, sizeof (* message));
	EthernetHeader (message, target, source, ETHERTYPE_IP);
	if (gettimeofday (&ts, NULL) == -1)
	{
		error (1, errno, CANT_START_TIMER);
	}
	for (timer = 0; timer < plc->timer; timer = SECONDS (ts, tc))
	{
		if (sendpacket (channel, message, sizeof (* message)) <= 0)
		{
			error (1, ECANCELED, CHANNEL_CANTSEND);
		}
		if (gettimeofday (&tc, NULL) == -1)
		{
			error (1, errno, CANT_RESET_TIMER);
		}
		SLEEP (100);
	}
	return (0);
}


#endif