evse_cm_slac_match.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 evse_cm_slac_match (struct session * session, struct channel * channel, struct message * message);
     *
     *   slac.h
     *
     *   receive CM_SLAC_MATCH.REQ and send CM_SLAC_MATCH.CNF containing
     *   random NMK/NID that EVSE-HLE will use to configure EVSE-PLC for
     *   charging;
     *
     *   users must develop their own means of generating random NMK/NID
     *   pairs because it is not part of the standard; this example does
     *   not attempt to randomize NMK/NID;
     *
     *--------------------------------------------------------------------*/

    #ifndef EVSE_CM_SLAC_MATCH_SOURCE
    #define EVSE_CM_SLAC_MATCH_SOURCE

    #include <stdio.h>
    #include <string.h>

    #include "../ether/channel.h"
    #include "../tools/memory.h"
    #include "../tools/error.h"
    #include "../tools/flags.h"
    #include "../iso15118/slac.h"

    signed evse_cm_slac_match (struct session * session, struct channel * channel, struct message * message)

    {
    	struct cm_slac_match_request * request = (struct cm_slac_match_request *) (message);
    	struct cm_slac_match_confirm * confirm = (struct cm_slac_match_confirm *) (message);
    	while (readmessage (channel, message, HOMEPLUG_MMV, (CM_SLAC_MATCH | MMTYPE_REQ)) > 0)
    	{
    		if (! memcmp (session->RunID, request->MatchVarField.RunID, sizeof (session->RunID)))
    		{
    			slac_debug (session, 0, __func__, "<-- CM_SLAC_MATCH.REQ");
    			memcpy (session->PEV_ID, request->MatchVarField.PEV_ID, sizeof (session->PEV_ID));
    			memcpy (session->PEV_MAC, request->MatchVarField.PEV_MAC, sizeof (session->PEV_MAC));
    			memcpy (session->RunID, request->MatchVarField.RunID, sizeof (session->RunID));

    #if SLAC_DEBUG

    			if (_anyset (session->flags, SLAC_VERBOSE))
    			{
    				char string [256];
    				slac_debug (session, 0, __func__, "CM_SLAC_MATCH.REQ.APPLICATION_TYPE %d", request->APPLICATION_TYPE);
    				slac_debug (session, 0, __func__, "CM_SLAC_MATCH.REQ.SECURITY_TYPE %d", request->SECURITY_TYPE);
    				slac_debug (session, 0, __func__, "CM_SLAC_MATCH.REQ.MVFLength %d", LE16TOH (request->MVFLength));
    				slac_debug (session, 0, __func__, "CM_SLAC_MATCH.REQ.PEV_ID %s", HEXSTRING (string, request->MatchVarField.PEV_ID));
    				slac_debug (session, 0, __func__, "CM_SLAC_MATCH.REQ.PEV_MAC %s", HEXSTRING (string, request->MatchVarField.PEV_MAC));
    				slac_debug (session, 0, __func__, "CM_SLAC_MATCH.REQ.EVSE_ID %s", HEXSTRING (string, request->MatchVarField.EVSE_ID));
    				slac_debug (session, 0, __func__, "CM_SLAC_MATCH.REQ.EVSE_MAC %s", HEXSTRING (string, request->MatchVarField.EVSE_MAC));
    				slac_debug (session, 0, __func__, "CM_SLAC_MATCH.REQ.RunID %s", HEXSTRING (string, request->MatchVarField.RunID));
    			}

    #endif

    			slac_debug (session, 0, __func__, "--> CM_SLAC_MATCH.CNF");
    			memset (message, 0, sizeof (* message));
    			EthernetHeader (& confirm->ethernet, session->PEV_MAC, channel->host, channel->type);
    			HomePlugHeader1 (& confirm->homeplug, HOMEPLUG_MMV, (CM_SLAC_MATCH | MMTYPE_CNF));
    			confirm->APPLICATION_TYPE = session->APPLICATION_TYPE;
    			confirm->SECURITY_TYPE = session->SECURITY_TYPE;
    			confirm->MVFLength = HTOLE16 (sizeof (confirm->MatchVarField));
    			memcpy (confirm->MatchVarField.PEV_ID, session->PEV_ID, sizeof (confirm->MatchVarField.PEV_ID));
    			memcpy (confirm->MatchVarField.PEV_MAC, session->PEV_MAC, sizeof (confirm->MatchVarField.PEV_MAC));
    			memcpy (confirm->MatchVarField.EVSE_ID, session->EVSE_ID, sizeof (confirm->MatchVarField.EVSE_ID));
    			memcpy (confirm->MatchVarField.EVSE_MAC, session->EVSE_MAC, sizeof (confirm->MatchVarField.EVSE_MAC));
    			memcpy (confirm->MatchVarField.RunID, session->RunID, sizeof (confirm->MatchVarField.RunID));
    			memcpy (confirm->MatchVarField.NID, session->NID, sizeof (confirm->MatchVarField.NID));
    			memcpy (confirm->MatchVarField.NMK, session->NMK, sizeof (confirm->MatchVarField.NMK));
    			if (sendmessage (channel, message, sizeof (* confirm)) <= 0)
    			{
    				return (slac_debug (session, 1, __func__, CHANNEL_CANTSEND));
    			}
    			return (0);
    		}
    	}
    	return (slac_debug (session, session->exit, __func__, "<-- CM_SLAC_MATCH.REQ ?"));
    }

    #endif

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