    /*====================================================================*
     *
     *   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.
     *
     *--------------------------------------------------------------------*/

    /*====================================================================*
     *
     *   PLCTopology.c
     *
     *   plc.h
     *
     *
     *   Contributor(s):
     *      Charles Maier <cmaier@qca.qualcomm.com>
     *      Matthieu Poullet <m.poullet@avm.de>
     *
     *--------------------------------------------------------------------*/

    #ifndef PLCTOPOLOGY_SOURCE
    #define PLCTOPOLOGY_SOURCE

    #include <memory.h>
    #include <errno.h>

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

    /*====================================================================*
     *
     *   signed PLCPlatform (struct channel * channel, struct plcstation * station);
     *
     *   populate plcstation structure with hardware and firmware version
     *   string using a VS_SW_VER message;
     *
     *   extern char const * chipset [] contains chipset name strings in
     *   order of chipset code but function chipset() must be called to
     *   insert the true code into the confirmation message because some
     *   chipsets return the wrong code; alien technology and voodoo are
     *   needed;
     *
     *--------------------------------------------------------------------*/

    static signed PLCPlatform (struct channel * channel, struct plcstation * plcstation)

    {
    	struct message message;
    	ssize_t packetsize;

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

    	struct __packed vs_sw_ver_request
    	{
    		struct ethernet_hdr ethernet;
    		struct qualcomm_hdr qualcomm;
    	}
    	* request = (struct vs_sw_ver_request *) (&message);
    	struct __packed vs_sw_ver_confirm
    	{
    		struct ethernet_hdr ethernet;
    		struct qualcomm_hdr qualcomm;
    		uint8_t MSTATUS;
    		uint8_t MDEVICE;
    		uint8_t MLENGTH;
    		char MSTRING [0x80];
    	}
    	* confirm = (struct vs_sw_ver_confirm *) (&message);

    #ifndef __GNUC__
    #pragma pack (pop)
    #endif

    	memset (&message, 0, sizeof (message));
    	EthernetHeader (&request->ethernet, plcstation->MAC, channel->host, channel->type);
    	QualcommHeader (&request->qualcomm, 0, (VS_SW_VER | MMTYPE_REQ));
    	if (sendpacket (channel, &message, (ETHER_MIN_LEN - ETHER_CRC_LEN)) > 0)
    	{
    		while ((packetsize = readpacket (channel, &message, sizeof (message))) > 0)
    		{
    			if (!UnwantedMessage (&message, packetsize, 0, (VS_SW_VER | MMTYPE_CNF)))
    			{
    				chipset (confirm);
    				strncpy (plcstation->hardware, chipsetname (confirm->MDEVICE), sizeof (plcstation->hardware));
    				strncpy (plcstation->firmware, confirm->MSTRING, sizeof (plcstation->firmware));
    				return (0);
    			}
    		}
    	}
    	return (-1);
    }

    /*====================================================================*
     *
     *   signed PLCIdentity (struct channel * channel, struct plcstation * station);
     *
     *   populate plcstation structure with the device identity using a
     *   VS_MFG_STRING message;
     *
     *--------------------------------------------------------------------*/

    static signed PLCIdentity (struct channel * channel, struct plcstation * plcstation)

    {
    	struct message message;
    	ssize_t packetsize;

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

    	struct __packed vs_mfg_string_request
    	{
    		struct ethernet_hdr ethernet;
    		struct qualcomm_hdr qualcomm;
    	}
    	* request = (struct vs_mfg_string_request *) (&message);
    	struct __packed vs_mfg_string_confirm
    	{
    		struct ethernet_hdr ethernet;
    		struct qualcomm_hdr qualcomm;
    		uint8_t MSTATUS;
    		uint8_t MLENGTH;
    		char MSTRING [0x40];
    	}
    	* confirm = (struct vs_mfg_string_confirm *) (&message);

    #ifndef __GNUC__
    #pragma pack (pop)
    #endif

    	memset (&message, 0, sizeof (message));
    	EthernetHeader (&request->ethernet, plcstation->MAC, channel->host, channel->type);
    	QualcommHeader (&request->qualcomm, 0, (VS_MFG_STRING | MMTYPE_REQ));
    	if (sendpacket (channel, &message, (ETHER_MIN_LEN - ETHER_CRC_LEN)) > 0)
    	{
    		while ((packetsize = readpacket (channel, &message, sizeof (message))) > 0)
    		{
    			if (!UnwantedMessage (&message, packetsize, 0, (VS_MFG_STRING | MMTYPE_CNF)))
    			{
    				strncpy (plcstation->identity, confirm->MSTRING, sizeof (plcstation->identity));
    				return (0);
    			}
    		}
    	}
    	return (-1);
    }

    /*====================================================================*
     *
     *   signed PLCTopology (struct channel * channel, struct message * message, struct plctopology * plctopology)
     *
     *   populate a plctopology structure with network information; the
     *   logic this is elusive due to the way the VS_NW_INFO message is
     *   structured;
     *
     *   the host can have many interfaces and each interface can have
     *   many powerline devices connected to it; each powerline device
     *   can bridge to an independent powerline network having a unique
     *   set of member devices; alternately, some powerline devices can
     *   be members of the same powerline network;
     *
     *   INT6x00 chipsets have an 8-bit PHY rate while AR7x00 chipsets
     *   have a 16-bit PHY rate; this means that AR7x00 PHY rates need
     *
     *--------------------------------------------------------------------*/

    signed PLCTopology (struct channel * channel, struct message * message, struct plctopology * plctopology)

    {
    	ssize_t packetsize;

    #if defined(INT6x00)

    	struct __packed vs_nw_info_request
    	{
    		struct ethernet_hdr ethernet;
    		struct qualcomm_hdr qualcomm;
    	}
    	* request = (struct vs_nw_info_request *)(message);
    	struct __packed vs_nw_info_confirm
    	{
    		struct ethernet_hdr ethernet;
    		struct qualcomm_hdr qualcomm;
    		uint8_t data [1];
    	}
    	* confirm = (struct vs_nw_info_confirm *)(message);
    	struct __packed station
    	{
    		uint8_t MAC [ETHER_ADDR_LEN];
    		uint8_t TEI;
    		uint8_t BDA [ETHER_ADDR_LEN];
    		uint8_t AVGTX;
    		uint8_t AVGRX;
    	}
    	* station;
    	struct __packed network
    	{
    		uint8_t NID [7];
    		uint8_t SNID;
    		uint8_t TEI;
    		uint8_t ROLE;
    		uint8_t CCO_MAC [ETHER_ADDR_LEN];
    		uint8_t CCO_TEI;
    		uint8_t NUMSTAS;
    		struct station stations [1];
    	}
    	* network;
    	struct __packed networks
    	{
    		uint8_t NUMAVLNS;
    		struct network networks [1];
    	}
    	* networks = (struct networks *) (confirm->data);

    #elif defined (AR7x00)

    	struct __packed vs_nw_info_request
    	{
    		struct ethernet_hdr ethernet;
    		struct qualcomm_fmi qualcomm;
    	}
    	* request = (struct vs_nw_info_request *)(message);
    	struct __packed vs_nw_info_confirm
    	{
    		struct ethernet_hdr ethernet;
    		struct qualcomm_fmi qualcomm;
    		uint8_t SUB_VERSION;
    		uint8_t Reserved;
    		uint16_t DATA_LEN;
    		uint8_t DATA [1];
    	}
    	* confirm = (struct vs_nw_info_confirm *)(message);
    	struct __packed station
    	{
    		uint8_t MAC [ETHER_ADDR_LEN];
    		uint8_t TEI;
    		uint8_t Reserved [3];
    		uint8_t BDA [ETHER_ADDR_LEN];
    		uint16_t AVGTX;
    		uint8_t COUPLING;
    		uint8_t Reserved3;
    		uint16_t AVGRX;
    		uint16_t Reserved4;
    	}
    	* station;
    	struct __packed network
    	{
    		uint8_t NID [7];
    		uint8_t Reserved1 [2];
    		uint8_t SNID;
    		uint8_t TEI;
    		uint8_t Reserved2 [4];
    		uint8_t ROLE;
    		uint8_t CCO_MAC [ETHER_ADDR_LEN];
    		uint8_t CCO_TEI;
    		uint8_t Reserved3 [3];
    		uint8_t NUMSTAS;
    		uint8_t Reserved4 [5];
    		struct station stations [1];
    	}
    	* network;
    	struct __packed networks
    	{
    		uint8_t Reserved;
    		uint8_t NUMAVLNS;
    		struct network networks [1];
    	}
    	* networks = (struct networks *) (confirm->DATA);

    #else
    #error "Unspecified Atheros chipset"
    #endif

    	struct plcnetwork * plcnetwork = (struct plcnetwork *)(&plctopology->plcnetwork);
    	struct plcstation * plcstation;
    	byte bridges [255] [ETHER_ADDR_LEN];
    	unsigned bridge = LocalDevices (channel, message, bridges, (size_t)(sizeof (bridges)));
    	while (bridge--)
    	{
    		memset (message, 0, sizeof (* message));
    		memcpy (channel->peer, bridges [bridge], sizeof (channel->peer));

    #if defined (INT6x00)

    		EthernetHeader (&request->ethernet, channel->peer, channel->host, channel->type);
    		QualcommHeader (&request->qualcomm, 0, (VS_NW_INFO | MMTYPE_REQ));

    #elif defined (AR7x00)

    		EthernetHeader (&request->ethernet, channel->peer, channel->host, channel->type);
    		QualcommHeader1 (&request->qualcomm, 1, (VS_NW_INFO | MMTYPE_REQ));

    #else
    #error "Unspecified Atheros chipset"
    #endif

    		if (sendpacket (channel, message, (ETHER_MIN_LEN - ETHER_CRC_LEN)) <= 0)
    		{
    			error (1, errno, CHANNEL_CANTSEND);
    		}
    		while ((packetsize = readpacket (channel, message, sizeof (* message))) > 0)
    		{

    #if defined (INT6x00)

    			if (UnwantedMessage (confirm, packetsize, 0, (VS_NW_INFO | MMTYPE_CNF)))

    #elif defined (AR7x00)

    			if (UnwantedMessage (confirm, packetsize, 1, (VS_NW_INFO | MMTYPE_CNF)))

    #else
    #error "Unspecified Atheros chipset"
    #endif

    			{
    				continue;
    			}
    			network = (struct network *)(&networks->networks);
    			plcstation = (struct plcstation *)(&plcnetwork->plcstation);
    			memset (plcnetwork, 0, sizeof (* plcnetwork));
    			memset (plcstation, 0, sizeof (* plcstation));
    			plcstation->LOC = !memcmp (confirm->ethernet.OSA, bridges [bridge], sizeof (confirm->ethernet.OSA));
    			plcstation->CCO = !memcmp (confirm->ethernet.OSA, network->CCO_MAC, sizeof (confirm->ethernet.OSA));
    			plcstation->TEI = network->TEI;
    			memcpy (plcstation->MAC, confirm->ethernet.OSA, sizeof (plcstation->MAC));
    			memcpy (plcstation->BDA, confirm->ethernet.ODA, sizeof (plcstation->BDA));
    			PLCPlatform (channel, plcstation);
    			plcnetwork->plcstations++;
    			plcstation++;
    			while (networks->NUMAVLNS--)
    			{
    				station = (struct station *)(&network->stations);
    				while (network->NUMSTAS--)
    				{
    					memset (plcstation, 0, sizeof (* plcstation));
    					plcstation->LOC = !memcmp (station->BDA, channel->host, sizeof (station->BDA));
    					plcstation->CCO = !memcmp (station->MAC, network->CCO_MAC, sizeof (station->MAC));
    					plcstation->TEI = station->TEI;
    					memcpy (plcstation->MAC, station->MAC, sizeof (plcstation->MAC));
    					memcpy (plcstation->BDA, station->BDA, sizeof (plcstation->BDA));

    #if defined (INT6x00)

    					plcstation->TX = station->AVGTX;
    					plcstation->RX = station->AVGRX;

    #elif defined (AR7x00)

    					plcstation->TX = LE16TOH (station->AVGTX);
    					plcstation->RX = LE16TOH (station->AVGRX);

    #else
    #error "Unspecified Atheros chipset"
    #endif

    					PLCPlatform (channel, plcstation);
    					PLCIdentity (channel, plcstation);
    					plcnetwork->plcstations++;
    					plcstation++;
    					station++;
    				}
    				plctopology->plcnetworks++;
    				plcnetwork = (struct plcnetwork *)(plcstation);
    				network = (struct network *)(station);
    			}
    		}
    	}
    	return (0);
    }

    /*====================================================================*
     *
     *--------------------------------------------------------------------*/

    #endif

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