/*-
 * Copyright (c) 1999-2000 James E. Housley <jim@thehousleys.net>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
 *
 * $Id: PROTOCOL,v 1.1.2.7 2000/10/11 01:18:19 housley Exp $
 */

Version 1.0 - Origional
  Command:
    GET T[1-3] : Get Temperature 1, 2 or 3
    GET S[1-3] : Get Fan Speed 1, 2 or 3
    GET V[1-7] : Get Voltage 1, 2, 3, 4, 5, 6 or 7
  Result:
    A null terminated ASCII string of the value.

  Command:
    GTV T[1-3] : Verbose get Temperature 1, 2 or 3
    GTV S[1-3] : Verbose get Fan Speed 1, 2 or 3
    GTV V[1-7] : Verbose get Voltage 1, 2, 3, 4, 5, 6 or 7
  Result:
    A null terminated string with 5 values seperated by the '|'
    character.  First is a the value.  Second is active, 1=active.
    Third is the number of out-of-bounds readings. Forth is 1 if
    a failure has been logged.  Fifth is 1 if a warning has been
    logged.

  Unknown commands return "ERROR: Unsupported command"

Version 2.0
  All of Version 1.0 plus the following.

  Command:
    END : Close the connectioin.
  Result:
    The string "Closing connection" is send and then healthd closes
    the connection.

  Command:
    VER P : Get the protocol Version.
  Result:
    A null terminated ASCII string with both major and minor values.
    Or an error.

  Command:
    VER d : Get the healthd Version.
  Result:
    A null terminated ASCII string with both major and minor values.
    Or an error.

  Command:
    CFG - Get the values from the configuration file.
      T[0-2] -  for temperature
      F[0-2] - for fan speed
      V[0-6] - for voltage
        ACT - for if active [yes/no]
        LBL - the text description [string]
        MIN - minimum value [integer/float]
        MAX - maximum value [integer/float]
        DOW - for doWarn [yes/no]
        DOF - for doFail [yes/no]
      TWarn - temperature warning command
      TFail - temperature fail command
      FWarn - fan warning command
      FFail - fan fail command
      VWarn - voltage warning command
      VFail - voltage fail command

      Therefore "CFG T1_ACT" returns whether Temp1 is active
      And "CFG V0_DOF" returns whether Volt0 will act on failures
      And "CFG FFail" returns the command executed on fan failure

  Result:
    Depends upon the command.
  NOTE: DOW and DOF parameters not enable by default because they provide
        information that might be exploitable.
  NOTE: TWarn, TFail, FWarn, FFail, VWarn and VFail parameters are not
        enabled by default because the provide information that might be
        exploitable.