ampwait.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.
     *
     *--------------------------------------------------------------------*/

    /*====================================================================*"
     *
     *   ampwait.c -
     *
     *
     *   Contributor(s):
     *      Charles Maier <cmaier@qca.qualcomm.com>
     *      Nathaniel Houghton <nhoughto@qca.qualcomm.com>
     *
     *--------------------------------------------------------------------*/

    /*====================================================================*"
     *   system header files;
     *--------------------------------------------------------------------*/

    #include <unistd.h>
    #include <stdlib.h>
    #include <stdint.h>
    #include <limits.h>
    #include <sys/time.h>

    /*====================================================================*
     *   custom header files;
     *--------------------------------------------------------------------*/

    #include "../tools/getoptv.h"
    #include "../tools/putoptv.h"
    #include "../tools/memory.h"
    #include "../tools/number.h"
    #include "../tools/symbol.h"
    #include "../tools/types.h"
    #include "../tools/flags.h"
    #include "../tools/files.h"
    #include "../tools/timer.h"
    #include "../tools/error.h"
    #include "../plc/plc.h"

    /*====================================================================*
     *   custom source files;
     *--------------------------------------------------------------------*/

    #ifndef MAKEFILE
    #include "../tools/getoptv.c"
    #include "../tools/putoptv.c"
    #include "../tools/version.c"
    #include "../tools/uintspec.c"
    #include "../tools/hexdump.c"
    #include "../tools/hexencode.c"
    #include "../tools/hexdecode.c"
    #include "../tools/todigit.c"
    #include "../tools/checkfilename.c"
    #include "../tools/synonym.c"
    #include "../tools/error.c"
    #endif

    #ifndef MAKEFILE
    #include "../plc/Confirm.c"
    #include "../plc/Display.c"
    #include "../plc/Failure.c"
    #include "../plc/ReadMME.c"
    #include "../plc/Request.c"
    #include "../plc/SendMME.c"
    #include "../plc/Devices.c"
    #endif

    #ifndef MAKEFILE
    #include "../ether/openchannel.c"
    #include "../ether/closechannel.c"
    #include "../ether/readpacket.c"
    #include "../ether/sendpacket.c"
    #include "../ether/channel.c"
    #endif

    #ifndef MAKEFILE
    #include "../mme/MMECode.c"
    #include "../mme/EthernetHeader.c"
    #include "../mme/QualcommHeader.c"
    #include "../mme/QualcommHeader1.c"
    #include "../mme/UnwantedMessage.c"
    #endif

    /*====================================================================*
     *
     *   signed ResetAndWait (struct plc * plc);
     *
     *   plc.h
     *
     *   send VS_RS_DEV.REQ messages every channel->timeout milliseconds
     *   until the device responds to indicate that it is ready to reset;
     *   return 0 if the device eventually responds within plc->timer
     *   seconds or -1 if not;
     *
     *--------------------------------------------------------------------*/

    signed ResetAndWait (struct plc * plc)

    {
    	struct channel * channel = (struct channel *)(plc->channel);
    	struct message * message = (struct message *)(plc->message);
    	struct timeval ts;
    	struct timeval tc;
    	unsigned timer = 0;

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

    	struct __packed vs_rs_dev_request
    	{
    		struct ethernet_hdr ethernet;
    		struct qualcomm_hdr qualcomm;
    	}
    	* request = (struct vs_rs_dev_request *) (message);
    	struct __packed vs_rs_dev_confirm
    	{
    		struct ethernet_hdr ethernet;
    		struct qualcomm_hdr qualcomm;
    		uint8_t MSTATUS;
    	}
    	* confirm = (struct vs_rs_dev_confirm *) (message);

    #ifndef __GNUC__
    #pragma pack (pop)
    #endif

    	Request (plc, "Reset when Ready");
    	if (gettimeofday (&ts, NULL) == -1)
    	{
    		error (1, errno, CANT_START_TIMER);
    	}
    	for (timer = 0; timer < plc->timer; timer = SECONDS (ts, tc))
    	{
    		memset (message, 0, sizeof (* message));
    		EthernetHeader (&request->ethernet, channel->peer, channel->host, channel->type);
    		QualcommHeader (&request->qualcomm, 0, (VS_RS_DEV | MMTYPE_REQ));
    		plc->packetsize = (ETHER_MIN_LEN - ETHER_CRC_LEN);
    		if (SendMME (plc) <= 0)
    		{
    			error (PLC_EXIT (plc), errno, CHANNEL_CANTSEND);
    			return (-1);
    		}
    		if (ReadMME (plc, 0, (VS_RS_DEV | MMTYPE_CNF)) < 0)
    		{
    			error (PLC_EXIT (plc), errno, CHANNEL_CANTREAD);
    			return (-1);
    		}
    		if (gettimeofday (&tc, NULL) == -1)
    		{
    			error (1, errno, CANT_RESET_TIMER);
    		}
    		if (plc->packetsize)
    		{
    			if (!confirm->MSTATUS)
    			{
    				Confirm (plc, "Resetting ...");
    				return (0);
    			}
    		}
    	}
    	return (-1);
    }

    /*====================================================================*
     *
     *   signed WaitForReset (struct plc * plc, char string [], size_t length);
     *
     *   plc.h
     *
     *   send VS_SW_VER.REQ  messages every channel->timeout milliseconds
     *   until the device stops responding to indicate that it is inactive;
     *   return 0 if the device eventually stops responding within
     *   plc->timer seconds or -1 if not;
     *
     *   this function cannot distinguish between a software reset and
     *   hardware reset;
     *
     *--------------------------------------------------------------------*/

    signed WaitForReset (struct plc * plc, char string [], size_t length)

    {
    	struct channel * channel = (struct channel *)(plc->channel);
    	struct message * message = (struct message *)(plc->message);
    	struct timeval ts;
    	struct timeval tc;
    	unsigned timer = 0;

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

    	struct __packed vs_sw_ver_request
    	{
    		struct ethernet_hdr ethernet;
    		struct qualcomm_hdr qualcomm;
    		uint8_t MSTATUS;
    		uint8_t MDEVICEID;
    		uint8_t MVERLENGTH;
    		char MVERSION [PLC_VERSION_STRING];
    	}
    	* 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 MDEVICEID;
    		uint8_t MVERLENGTH;
    		char MVERSION [PLC_VERSION_STRING];
    	}
    	* confirm = (struct vs_sw_ver_confirm *) (message);

    #ifndef __GNUC__
    #pragma pack (pop)
    #endif

    	memset (string, 0, length);
    	Request (plc, "Allow %d seconds for Reset", plc->timer);
    	if (gettimeofday (&ts, NULL) == -1)
    	{
    		error (1, errno, CANT_START_TIMER);
    	}
    	for (timer = 0; timer < plc->timer; timer = SECONDS (ts, tc))
    	{
    		memset (message, 0, sizeof (* message));
    		EthernetHeader (&request->ethernet, channel->peer, channel->host, channel->type);
    		QualcommHeader (&request->qualcomm, 0, (VS_SW_VER | MMTYPE_REQ));
    		plc->packetsize = (ETHER_MIN_LEN - ETHER_CRC_LEN);
    		if (SendMME (plc) <= 0)
    		{
    			error (PLC_EXIT (plc), errno, CHANNEL_CANTSEND);
    			return (-1);
    		}
    		if (ReadMME (plc, 0, (VS_SW_VER | MMTYPE_CNF)) < 0)
    		{
    			error (PLC_EXIT (plc), errno, CHANNEL_CANTREAD);
    			return (-1);
    		}
    		if (gettimeofday (&tc, NULL) == -1)
    		{
    			error (1, errno, CANT_RESET_TIMER);
    		}
    		if (!plc->packetsize)
    		{
    			if (_allset (plc->flags, (PLC_WAITFORRESET | PLC_ANALYSE)))
    			{
    				Confirm (plc, "Waited %d seconds for Reset", timer);
    			}
    			memcpy (string, confirm->MVERSION, confirm->MVERLENGTH);
    			return (0);
    		}
    	}
    	if (_allset (plc->flags, (PLC_WAITFORRESET | PLC_ANALYSE)))
    	{
    		Confirm (plc, "Waited %d seconds for Reset", timer);
    	}
    	return (-1);
    }

    /*====================================================================*
     *
     *   signed WaitForStart (struct plc * plc, char string [], size_t length);
     *
     *   plc.h
     *
     *   send VS_SW_VER.REQ messages every channel->timeout milliseconds
     *   until the device responds to indicate that it is active; return
     *   0 if the device eventually responds within plc->timer seconds
     *   or -1 if not;
     *
     *--------------------------------------------------------------------*/

    signed WaitForStart (struct plc * plc, char string [], size_t length)

    {
    	struct channel * channel = (struct channel *)(plc->channel);
    	struct message * message = (struct message *)(plc->message);
    	struct timeval ts;
    	struct timeval tc;
    	unsigned timer = 0;

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

    	struct __packed vs_sw_ver_request
    	{
    		struct ethernet_hdr ethernet;
    		struct qualcomm_hdr qualcomm;
    		uint8_t MSTATUS;
    		uint8_t MDEVICEID;
    		uint8_t MVERLENGTH;
    		char MVERSION [PLC_VERSION_STRING];
    	}
    	* 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 MDEVICEID;
    		uint8_t MVERLENGTH;
    		char MVERSION [PLC_VERSION_STRING];
    	}
    	* confirm = (struct vs_sw_ver_confirm *) (message);

    #ifndef __GNUC__
    #pragma pack (pop)
    #endif

    	Request (plc, "Allow %d seconds for Start", plc->timer);
    	if (gettimeofday (&ts, NULL) == -1)
    	{
    		error (1, errno, CANT_START_TIMER);
    	}
    	for (timer = 0; timer < plc->timer; timer = SECONDS (ts, tc))
    	{
    		memset (message, 0, sizeof (* message));
    		EthernetHeader (&request->ethernet, channel->peer, channel->host, channel->type);
    		QualcommHeader (&request->qualcomm, 0, (VS_SW_VER | MMTYPE_REQ));
    		plc->packetsize = (ETHER_MIN_LEN - ETHER_CRC_LEN);
    		if (SendMME (plc) <= 0)
    		{
    			error (PLC_EXIT (plc), errno, CHANNEL_CANTSEND);
    			return (-1);
    		}
    		if (ReadMME (plc, 0, (VS_SW_VER | MMTYPE_CNF)) < 0)
    		{
    			error (PLC_EXIT (plc), errno, CHANNEL_CANTREAD);
    			return (-1);
    		}
    		if (gettimeofday (&tc, NULL) == -1)
    		{
    			error (1, errno, CANT_RESET_TIMER);
    		}
    		if (plc->packetsize)
    		{
    			if (confirm->MSTATUS)
    			{
    				Failure (plc, PLC_WONTDOIT);
    				return (-1);
    			}
    			if (_allset (plc->flags, (PLC_WAITFORSTART | PLC_ANALYSE)))
    			{
    				Confirm (plc, "Waited %d seconds for Start", timer);
    			}
    			strncpy (string, confirm->MVERSION, length);
    			return (0);
    		}
    	}
    	if (_allset (plc->flags, (PLC_WAITFORSTART | PLC_ANALYSE)))
    	{
    		Confirm (plc, "Waited %d seconds for Start", timer);
    	}
    	return (-1);
    }

    /*====================================================================*
     *
     *   signed WaitForAssoc (struct plc * plc);
     *
     *   plc.h
     *
     *   send VS_NW_INFO.REQ messages every channel->timeout milliseconds
     *   until the device reports that a network has formed; return 0 if a
     *   network forms within plc->timer seconds or -1 if not;
     *
     *--------------------------------------------------------------------*/

    signed WaitForAssoc (struct plc * plc)

    {
    	extern const uint8_t broadcast [ETHER_ADDR_LEN];
    	struct channel * channel = (struct channel *)(plc->channel);
    	struct message * message = (struct message *)(plc->message);
    	struct timeval ts;
    	struct timeval tc;
    	unsigned timer = 0;

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

    	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);

    #ifndef __GNUC__
    #pragma pack (pop)
    #endif

    	Request (plc, "Allow %d seconds for Assoc", plc->timer);
    	if (gettimeofday (&ts, NULL) == -1)
    	{
    		error (1, errno, CANT_START_TIMER);
    	}
    	for (timer = 0; timer < plc->timer; timer = SECONDS (ts, tc))
    	{
    		memset (message, 0, sizeof (* message));
    		EthernetHeader (&request->ethernet, channel->peer, channel->host, channel->type);
    		QualcommHeader1 (&request->qualcomm, 1, (VS_NW_INFO | MMTYPE_REQ));
    		plc->packetsize = (ETHER_MIN_LEN - ETHER_CRC_LEN);
    		if (SendMME (plc) <= 0)
    		{
    			error (PLC_EXIT (plc), errno, CHANNEL_CANTSEND);
    			return (-1);
    		}
    		if (ReadMME (plc, 1, (VS_NW_INFO | MMTYPE_CNF)) < 0)
    		{
    			error (PLC_EXIT (plc), errno, CHANNEL_CANTREAD);
    			return (-1);
    		}
    		if (gettimeofday (&tc, NULL) == -1)
    		{
    			error (1, errno, CANT_RESET_TIMER);
    		}
    		if (plc->packetsize)
    		{
    			network = (struct network *)(&networks->networks);
    			while (networks->NUMAVLNS--)
    			{
    				station = (struct station *)(&network->stations);
    				while (network->NUMSTAS--)
    				{
    					if (memcmp (station->MAC, broadcast, sizeof (broadcast)))
    					{
    						if (_allset (plc->flags, (PLC_WAITFORASSOC | PLC_ANALYSE)))
    						{
    							Confirm (plc, "Waited %d seconds for Assoc", timer);
    						}
    						return (0);
    					}
    					station++;
    				}
    				network = (struct network *)(station);
    			}
    		}
    	}
    	if (_allset (plc->flags, (PLC_WAITFORASSOC | PLC_ANALYSE)))
    	{
    		Confirm (plc, "Waited %d seconds for Assoc", timer);
    	}
    	return (-1);
    }

    /*====================================================================*
     *
     *   void function (struct plc * plc, char const * firmware);
     *
     *   perform operations in a logical order;
     *
     *
     *--------------------------------------------------------------------*/

    static void function (struct plc * plc, char const * firmware)

    {
    	char string [PLC_VERSION_STRING];
    	if (_anyset (plc->flags, PLC_RESET_DEVICE))
    	{
    		if (ResetAndWait (plc))
    		{
    			Failure (plc, "Device did not Reset.");
    		}
    	}
    	if (_anyset (plc->flags, PLC_WAITFORRESET))
    	{
    		if (WaitForReset (plc, string, sizeof (string)))
    		{
    			Failure (plc, "Device did not Reset.");
    		}
    	}
    	if (_anyset (plc->flags, PLC_WAITFORSTART))
    	{
    		if (WaitForStart (plc, string, sizeof (string)))
    		{
    			Failure (plc, "Device did not Start.");
    		}
    		if ((firmware) && (*firmware) && strcmp (firmware, string))
    		{
    			Failure (plc, "Started wrong firmware");
    		}
    	}
    	if (_anyset (plc->flags, PLC_WAITFORASSOC))
    	{
    		if (WaitForAssoc (plc))
    		{
    			Failure (plc, "Device did not Assoc.");
    		}
    	}
    	if (plc->sleep)
    	{
    		Request (plc, "Pause %d seconds", plc->sleep);
    		sleep (plc->sleep);
    	}
    	return;
    }

    /*====================================================================*
     *
     *   int main (int argc, char const * argv[]);
     *
     *   parse command line, populate plc structure and perform selected
     *   operations; show help summary if asked; see getoptv and putoptv
     *   to understand command line parsing and help summary display; see
     *   plc.h for the definition of struct plc;
     *
     *   the command line accepts multiple MAC addresses and the program
     *   performs the specified operations on each address, in turn; the
     *   address order is significant but the option order is not; the
     *   default address is a local broadcast that causes all devices on
     *   the local H1 interface to respond but not those at the remote
     *   end of the powerline;
     *
     *   the default address is 00:B0:52:00:00:01; omitting the address
     *   will automatically address the local device; some options will
     *   cancel themselves if this makes no sense;
     *
     *   the default interface is eth1 because most people use eth0 as
     *   their principle network connection; you can specify another
     *   interface with -i or define environment string PLC to make
     *   that the default interface and save typing;
     *
     *
     *--------------------------------------------------------------------*/

    int main (int argc, char const * argv [])

    {
    	extern struct channel channel;
    	static char const * optv [] =
    	{
    		"aef:i:p:qrRstvw:xy",
    		"device [device] [...] [> stdout]",
    		"Qualcomm Atheros Powerline Procrastinator",
    		"a\twait for device assoc",
    		"e\tredirect stderr to stdout",
    		"f s\tconfirm firmware is revision s",

    #if defined (WINPCAP) || defined (LIBPCAP)

    		"i n\thost interface is (n) [" LITERAL (CHANNEL_ETHNUMBER) "]",

    #else

    		"i s\thost interface is (s) [" LITERAL (CHANNEL_ETHDEVICE) "]",

    #endif

    		"p n\tpause (n) seconds",
    		"q\tquiet mode",
    		"r\twait for device reset",
    		"R\treset device and wait",
    		"s\twait for device start",
    		"t n\tchannel timeout is (n) milliseconds [" LITERAL (CHANNEL_TIMEOUT) "]",
    		"v\tverbose mode",
    		"w n\twait up to (n) seconds for action [" LITERAL (PLC_TIMER) "]",
    		"x\texit on error",
    		"y\treport failure times",
    		(char const *) (0)
    	};

    #include "../plc/plc.c"

    	char const * firmware = "";
    	signed c;
    	if (getenv (PLCDEVICE))
    	{

    #if defined (WINPCAP) || defined (LIBPCAP)

    		channel.ifindex = atoi (getenv (PLCDEVICE));

    #else

    		channel.ifname = strdup (getenv (PLCDEVICE));

    #endif

    	}
    	optind = 1;
    	while ((c = getoptv (argc, argv, optv)) != -1)
    	{
    		switch (c)
    		{
    		case 'a':
    			_setbits (plc.flags, PLC_WAITFORASSOC);
    			break;
    		case 'e':
    			dup2 (STDOUT_FILENO, STDERR_FILENO);
    			break;
    		case 'f':
    			firmware = optarg;
    			break;
    		case 'i':

    #if defined (WINPCAP) || defined (LIBPCAP)

    			channel.ifindex = atoi (optarg);

    #else

    			channel.ifname = optarg;

    #endif

    			break;
    		case 'p':
    			plc.sleep = (unsigned)(uintspec (optarg, 0, 3600));
    			break;
    		case 'q':
    			_setbits (channel.flags, CHANNEL_SILENCE);
    			_setbits (plc.flags, PLC_SILENCE);
    			break;
    		case 'r':
    			_setbits (plc.flags, PLC_WAITFORRESET);
    			break;
    		case 'R':
    			_setbits (plc.flags, PLC_RESET_DEVICE);
    			break;
    		case 's':
    			_setbits (plc.flags, PLC_WAITFORSTART);
    			break;
    		case 't':
    			channel.timeout = (signed)(uintspec (optarg, 0, UINT_MAX));
    			break;
    		case 'v':
    			_setbits (channel.flags, CHANNEL_VERBOSE);
    			_setbits (plc.flags, PLC_VERBOSE);
    			break;
    		case 'w':
    			plc.timer = (unsigned)(uintspec (optarg, 0, 86400));
    			break;
    		case 'x':
    			_setbits (plc.flags, PLC_BAILOUT);
    			break;
    		case 'y':
    			_setbits (plc.flags, PLC_ANALYSE);
    			break;
    		default:
    			break;
    		}
    	}
    	argc -= optind;
    	argv += optind;
    	openchannel (&channel);
    	if (!(plc.message = malloc (sizeof (* plc.message))))
    	{
    		error (1, errno, PLC_NOMEMORY);
    	}
    	if (!argc)
    	{
    		function (&plc, firmware);
    	}
    	while ((argc) && (* argv))
    	{
    		if (!hexencode (channel.peer, sizeof (channel.peer), synonym (* argv, devices, SIZEOF (devices))))
    		{
    			error (1, errno, PLC_BAD_MAC, * argv);
    		}
    		function (&plc, firmware);
    		argv++;
    		argc--;
    	}
    	free (plc.message);
    	closechannel (&channel);
    	exit (0);
    }

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