#!/bin/sh
#
# External STONITH module for APC Switched Rack PDU
#
# Copyright (c) 2008 Sergey Maznichenko <msergeyb@gmail.com> <inbox@it-consultant.su>
# Version 1.2
#
# See http://www.it-consultant.su/rackpdu
# for additional information
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of version 2 of the GNU General Public License as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it would be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
#
# Further, this software is distributed without any warranty that it is
# free of the rightful claim of any third person regarding infringement
# or the like.  Any license provided herein, whether implied or
# otherwise, applies only to this software file.  Patent licenses, if
# any, provided herein do not apply to combinations of this program with
# other software, or any other product whatsoever.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write the Free Software Foundation,
# Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
#

. /etc/ha.d/shellfuncs

SWITCH_ON="1"
SWITCH_OFF="2"
SWITCH_RESET="3"

DEFAULT_NAMES_OID=".1.3.6.1.4.1.318.1.1.12.3.3.1.1.2"
DEFAULT_COMMAND_OID=".1.3.6.1.4.1.318.1.1.12.3.3.1.1.4"

if [ -z "$oid" ]; then
    oid=$DEFAULT_COMMAND_OID
fi

if [ -z "$names_oid" ]; then
    names_oid=$DEFAULT_NAMES_OID
fi

if [ -z "$outlet_config" ]; then
    outlet_config="none"
fi

GetOutletNumber() {
    local nodename=$1

    if [ "$outlet_config" != "none" ]; then
	# Get outlet number from file

	if [ -f "$outlet_config" ]; then
    	    local outlet_num=`grep $nodename $outlet_config | tr -d ' ' | cut -f2 -d'='`
	    if [ -z "$outlet_num" ]; then
		ha_log "ERROR: Outlet number not found for node $nodename. Check configuration file $outlet_config"
		return 0
	    fi
	    return $outlet_num
	else
	    ha_log "ERROR: File $outlet_config not found."
	    return 0
	fi
    else
	# Get outlet number from device
    
	local outlet_num=1
	local snmp_result=`snmpwalk -v1 -c $community $pduip $names_oid 2>&1`

	local names=`echo "$snmp_result" | cut -f2 -d'"' | tr ' ' '_' | tr '\012' ' '`

	for name in $names; do
	    if [ "$name" != "$nodename" ]; then
		local outlet_num=`expr $outlet_num + 1`
		continue
    	    fi

	    return $outlet_num
	done
	
	ha_log "ERROR: Outlet number not found for node $nodename. Result: $snmp_result"
	return 0
    fi
}

SendCommand() {

    local host=$1
    local command=$2
    
    GetOutletNumber $host
    local outlet=$?

    if [ $outlet -gt 0 ]; then
        local set_result=`snmpset -v1 -c $community $pduip $oid.$outlet i $command 2>&1`
        local check_result=`echo "$set_result" | grep "Timeout"`	    

        if [ ! -z "$check_result" ]; then
    	    ha_log "ERROR: Write SNMP value $oid.$outlet=$command. Result: $set_result"
	fi
	    
	return 0
    else
        return 1
    fi
}

hostlist=`echo $hostlist | tr ',' ' '`
incommand=$1
innode=$2

case $incommand in
gethosts)
	if [ "$hostlist" = "AUTO" ]; then
	    snmp_result=`snmpwalk -v1 -c $community $pduip $names_oid 2>&1`
	    snmp_check=`echo "$snmp_result" | grep "Timeout"`

	    if [ ! -z "$snmp_check" ]; then
		ha_log "ERROR: Cannot read list of nodes from device. Result: $snmp_result"
		exit 1
	    else
		hostlist=`echo "$snmp_result" | cut -f2 -d'"' | tr ' ' '_' | tr '\012' ' '`
	    fi
	fi
	
	for h in $hostlist ; do
    	    echo $h
	done

	exit 0
	;;
on)
	if
	    SendCommand $innode $SWITCH_ON
	then
	    exit 0
	else
	    exit 1
	fi
	;;
off)
	if
	    SendCommand $innode $SWITCH_OFF
	then
	    exit 0
	else
	    exit 1
	fi
	;;
reset)
	if
	    SendCommand $innode $SWITCH_RESET
	then
	    exit 0
	else
	    exit 1
	fi
	;;
status)
        if [ -z "$pduip" ]; then
    	    exit 1
	fi

	if ping -w1 -c1 $pduip >/dev/null 2>&1; then
    	    exit 0
	else
	    exit 1
	fi
	;;
getconfignames)
	echo "hostlist pduip community"
	exit 0
	;;
getinfo-devid)
	echo "rackpdu STONITH device"
	exit 0
	;;
getinfo-devname)
	echo "rackpdu STONITH external device"
	exit 0
	;;
getinfo-devdescr)
	echo "APC Switched Rack PDU"
	exit 0
	;;
getinfo-devurl)
	echo "http://www.it-consultant.su/rackpdu"
	exit 0
	;;
getinfo-xml)
	cat << PDUXML
<parameters>
    <parameter name="hostlist" unique="1" required="1">
	<content type="string" default="AUTO" />
	<shortdesc lang="en">Hostlist</shortdesc>
	<longdesc lang="en">
The list of hosts that the STONITH device controls (comma or space separated).
If you set value of this parameter to AUTO, list of hosts will be get from Rack PDU device.
	</longdesc>
    </parameter>

    <parameter name="pduip" unique="1" required="1">
	<content type="string" />
	<shortdesc lang="en">Name or IP address of Rack PDU device.</shortdesc>
	<longdesc lang="en">Name or IP address of Rack PDU device.</longdesc>
    </parameter>

    <parameter name="community" unique="1" required="1">
	<content type="string" default="private" />
	<shortdesc lang="en">Name of write community.</shortdesc>
	<longdesc lang="en">Name of write community.</longdesc>
    </parameter>

    <parameter name="oid" unique="1" required="0">
    <content type="string" />
    <shortdesc lang="en">
	The OID without the outlet number.
    </shortdesc>
    <longdesc lang="en">
The SNMP OID for the PDU. minus the outlet number.
Try .1.3.6.1.4.1.318.1.1.12.3.3.1.1.4 (default value)
or use mib from ftp://ftp.apcc.com/apc/public/software/pnetmib/mib/
Varies on different APC hardware and firmware.
Warning! No dot at the end of OID
    </longdesc>
    </parameter>

    <parameter name="names_oid" unique="1" required="0">
	<content type="string" />
	<shortdesc lang="en">The OID for getting names of outlets.</shortdesc>
	<longdesc lang="en">
The SNMP OID for getting names of outlets.
It is required to recognize outlet number by nodename.
Try ".1.3.6.1.4.1.318.1.1.12.3.3.1.1.2" (default value)
or use mib from ftp://ftp.apcc.com/apc/public/software/pnetmib/mib/
Names of nodes must be equal names of outlets, in other way use outlet_config parameter.
If you set 'names_oid' parameter then parameter outlet_config must not be use.
Varies on different APC hardware and firmware.
Warning! No dot at the end of OID
	</longdesc>
    </parameter>

    <parameter name="outlet_config" unique="1" required="0">
    <content type="string" />
    <shortdesc lang="en">Configuration file. Other way to recognize outlet number by nodename.</shortdesc>
    <longdesc lang="en">
Configuration file. Other way to recognize outlet number by nodename.
Configuration file which contains
node_name=outlet_number
strings.

Example:
server1=1
server2=2

If you use outlet_config parameter then names_oid parameter can have any value and it is not uses.
    </longdesc>
    </parameter>

</parameters>
PDUXML
	exit 0
	;;
*)
	exit 1
	;;
esac
