FlashMOD.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.
     *
     *--------------------------------------------------------------------*/

    /*====================================================================*
     *
     *   signed FlashMOD (struct channel * channel, uint8_t module);
     *
     *   plc.h
     *
     *   commit downloaded firmware and/or parameters to NVRAM using a
     *   VS_MOD_NVM message; flash-less devices will attempt to upload
     *   to the local host since they have no NVRAM; the host must be
     *   ready to receive the module;
     *
     *
     *   Contributor(s):
     *      Charles Maier <cmaier@qca.qualcomm.com>
     *      Nathaniel Houghton <nhoughto@qca.qualcomm.com>
     *      Matthieu Poullet <m.poullet@avm.de>
     *
     *--------------------------------------------------------------------*/

    #ifndef FLASHMOD_SOURCE
    #define FLASHMOD_SOURCE

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

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

    signed FlashMOD (struct channel * channel, uint8_t module)

    {
    	struct message message;

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

    	struct __packed vs_mod_nvm_request
    	{
    		struct ethernet_hdr ethernet;
    		struct qualcomm_hdr qualcomm;
    		uint8_t MODULEID;
    	}
    	* request = (struct vs_mod_nvm_request *) (&message);
    	struct __packed vs_mod_nvm_confirm
    	{
    		struct ethernet_hdr ethernet;
    		struct qualcomm_hdr qualcomm;
    		uint8_t MSTATUS;
    		uint8_t MODULEID;
    	}
    	* confirm = (struct vs_mod_nvm_confirm *) (&message);

    #ifndef __GNUC__
    #pragma pack (pop)
    #endif

    	ssize_t packetsize;
    	memset (&message, 0, sizeof (message));
    	EthernetHeader (&request->ethernet, channel->peer, channel->host, channel->type);
    	QualcommHeader (&request->qualcomm, 0, (VS_MOD_NVM | MMTYPE_REQ));
    	request->MODULEID = module;
    	if (sendpacket (channel, &message, (ETHER_MIN_LEN - ETHER_CRC_LEN)) <= 0)
    	{
    		error (1, errno, CHANNEL_CANTSEND);
    	}
    	if ((packetsize = readpacket (channel, &message, sizeof (message))) <= 0)
    	{
    		error (1, errno, CHANNEL_CANTREAD);
    	}
    	if (UnwantedMessage (&message, packetsize, 0, (VS_MOD_NVM | MMTYPE_CNF)))
    	{
    		error (1, ECANCELED, PLC_BADFRAME);
    	}
    	if (confirm->MSTATUS)
    	{
    		error (1, ECANCELED, PLC_WONTDOIT);
    	}
    	return (0);
    }

    #endif

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