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

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

/*====================================================================*
 *
 *   signed PushButton (struct plc * plc);
 *
 *   plc.h
 *
 *   THis plugin for program plc emulates pushbutton functionality
 *   using a MS_PB_ENC message;
 *
 *
 *   Contributor(s):
 *      Charles Maier
 *
 *--------------------------------------------------------------------*/

#ifndef PUSHBUTTON_SOURCE
#define PUSHBUTTON_SOURCE

#include <stdint.h>
#include <memory.h>

#include "../tools/error.h"
#include "../tools/memory.h"
#include "../plc/plc.h"

signed PushButton (struct plc * plc)

{
	struct channel * channel = (struct channel *)(plc->channel);
	struct message * message = (struct message *)(plc->message);

#ifndef __GNUC__
#pragma pack (push,1)
#endif

	struct __packed ms_pb_enc_request
	{
		struct ethernet_hdr ethernet;
		struct homeplug_hdr homeplug;
		uint8_t PBACTION;
	}
	* request = (struct ms_pb_enc_request *) (message);
	struct __packed ms_pb_enc_confirm
	{
		struct ethernet_hdr ethernet;
		struct homeplug_hdr homeplug;
		uint8_t MSTATUS;
		uint8_t AVLNSTAT;
	}
	* confirm = (struct ms_pb_enc_confirm *) (message);

#ifndef __GNUC__
#pragma pack (pop)
#endif

	if (plc->pushbutton == 1)
	{
		Request (plc, "Join Network");
	}
	if (plc->pushbutton == 2)
	{
		Request (plc, "Leave Network");
	}
	if (plc->pushbutton == 3)
	{
		Request (plc, "Fetch Network Status");
	}
	memset (message, 0, sizeof (* message));
	EthernetHeader (&request->ethernet, channel->peer, channel->host, channel->type);
	request->homeplug.MMV = 0;
	request->homeplug.MMTYPE = HTOLE16 (MS_PB_ENC | MMTYPE_REQ);
	request->PBACTION = plc->pushbutton;
	plc->packetsize = (ETHER_MIN_LEN - ETHER_CRC_LEN);
	if (SendMME (plc) <= 0)
	{
		error (PLC_EXIT (plc), errno, CHANNEL_CANTSEND);
		return (-1);
	}
	if (ReadMFG (plc, 0, (MS_PB_ENC | MMTYPE_CNF)) <= 0)
	{
		error (PLC_EXIT (plc), errno, CHANNEL_CANTREAD);
		return (-1);
	}
	if (confirm->MSTATUS)
	{
		Failure (plc, PLC_WONTDOIT);
		return (-1);
	}
	if (plc->pushbutton == 1)
	{
		Confirm (plc, "Joining ...");
		return (0);
	}
	if (plc->pushbutton == 2)
	{
		Confirm (plc, "Leaving ...");
		return (0);
	}
	if (plc->pushbutton == 3)
	{
		Confirm (plc, "Membership Status %d", confirm->AVLNSTAT);
		return (0);
	}
	Failure (plc, "Unexpected pushbutton action code");
	return (-1);
}


#endif