#!/bin/bash
#
#  nagios_hpeilo_traps -- The script aims to collect the SNMP traps 
#			 received from HP ProLiant Server and to 
#			 update the corresponding status in real-time
#	        
#  (C) Copyright [2015] Hewlett-Packard Enterprise Development Company, L.P.
#
#  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 will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 
#
#  See the GNU General Public License for more details.
#  
#  You should have received a copy of the GNU General Public License 
#  along with this program; if not, write to:
#   Free Software Foundation, Inc.
#   51 Franklin Street, Fifth Floor
#   Boston, MA 02110-1301, USA.  
#
#   Written by Adrian Huang <adrian.huang@hp.com>.

prefix=$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )

NagiosLibexec="${prefix}"
NagiosHpiloEngine="nagios_hpeilo_engine"

HpiloLogFile="/var/log/nagios_hpeilo_traps.log"
HpiloSnmpComm="public" # hpeilo ilo community string
HpiloServices=("System Status" "Fans" "Memory" "Network" "Power Supplies" "Processors" "Storage" "Temperatures")

SnmpTrapOid="iso.3.6.1.6.3.1.1.4.1.0"

HlthStatusChgTrap="HlthStuatsChangeTrap"

function get_hlth_service_type () {
	case $1 in
		603[5-9] | 6055 ) # Fan Group Trap
			echo "${HpiloServices[1]}"
			;;
		603[0-4] | 604[8-9] | 6050 |  605[4-5] ) # Power Supply Group Trap
			echo "${HpiloServices[4]}"
			;;
		604[0-2] ) # Temperature Group Trap
			echo "${HpiloServices[7]}"
			;;
		602[3-4] ) # Processors Group Trap
			echo "${HpiloServices[5]}"
			;;
		11020 ) # Health Status Array Change Trap
			echo "$HlthStatusChgTrap"
			;;
		*) 
			echo "None"
			;;
	esac
}

# argument 1 ($1): the iLO IP which generated the trap this time 
# argument 2 ($2): service type
# argument 3 ($3): service status (NAGIOS_OK or NAGIOS_WARNING or ...)
# argument 4 ($4): status information 
function nagios_passive_check () {

	
	write_log "PROCESS_SERVICE_CHECK_RESULT;$1;$2;$3;$4" 

	now=$((`date +%s`))
	printf "[%lu] PROCESS_SERVICE_CHECK_RESULT;$1;$2;$3;$4\n" $now > $NagiosCmdFile

}

# argument 1 ($1): The data to be logged
function write_log () {
	if [ "$VerboseMode" = "1" ]
	then
		echo -e "[`date "+%b %d %T"`] $1" >> $HpiloLogFile
	fi
}

function get_nagios_cfg_file() {
	local	nagios_cfg=


	# The format might be like: 
	#	1)  NagiosIloCfgFile=${prefix}/etc/nagios.cfg
	#	2)  NAGIOSCFG="/etc/nagios3/nagios.cfg"
        nagios_cfg=`grep -E "=.*etc.*nagios.cfg" /etc/init.d/nagios* | \
			cut -d '=' -f 2`

	# trim double quotes
	nagios_cfg=`echo $nagios_cfg | tr -d '"'`

	if [[ $nagios_cfg = *prefix* ]]; then
		# The /etc/init.d/nagios* has the fomrat like this:
		# 	NagiosIloCfgFile=${prefix}/etc/nagios.cfg
		# So, we need to replace ${prefix} with the actual value

		# Find the nagios prefix path
		local nagios_prefix=`grep -i "^prefix=" /etc/init.d/nagios* | \
				cut -d '=' -f 2`

		# ${prefix}/etc/nagios.cfg -> will be etc/nagios.cfg
		local nagios_suffix=`echo $nagios_cfg | cut -d '/' -f 2-`

		nagios_cfg="${nagios_prefix}/$nagios_suffix"
	fi

	echo "$nagios_cfg"

}

function get_nagios_ilo_cfg_path() {
	local   nagios_cfg=$(get_nagios_cfg_file)
	local nagios_path=`dirname $nagios_cfg`
	local NagiosIloCfgFile="$nagios_path/ilo/ilo.cfg"
	echo $NagiosIloCfgFile
}

# argument 1 ($1): the iLO IP which generated the trap this time 
# argument 2 ($2): the iLO IP trap number 
# argument 3 ($3): service type
function update_hlth_status () {
	local nagios_cfg_file=$(get_nagios_cfg_file)
	local oid_idx=
	local nagios_service_status=

	write_log "$nagios_cfg_file"

	NagiosCmdFile=`grep -r command_file $nagios_cfg_file | \
		awk -F = '{print $2}'`


	for((idx=0;idx<${#HpiloServices[@]};idx++)) 
	do
		if [ "$3" = "${HpiloServices[$idx]}" ]; then
			oid_idx=$idx
			break
		fi
	done
		
	# The oid_idx must be increased by 1 since the oid index of the 
	# NagiosHpiloEngine is started from 1 rather than 0. 
	write_log "$NagiosLibexec/$NagiosHpiloEngine -H $IloIP -C $HpiloSnmpComm -o $((oid_idx+1))" 
	output=`$NagiosLibexec/$NagiosHpiloEngine -H $IloIP -C $HpiloSnmpComm -o $((oid_idx+1))`

	nagios_service_status=$?

	nagios_passive_check "$1" "$3" "$nagios_service_status" "$output"
		

}

# argument 1 ($1): the iLO IP  
# argument 2 ($2): the iLO IP  RO community string
function update_hlth_status_from_status_array () {
	local nagios_cfg_file=$(get_nagios_cfg_file)
	local oid_idx=0
	local curr_oid_idx=$3
	local curr_oid_idx=$((curr_oid_idx-1))
	local curr_odi_status=
	local curr_oid_disc=
	nagios_service_status=0
	local hlth_array_count=0
	write_log "$nagios_cfg_file"

	NagiosCmdFile=`grep -r command_file $nagios_cfg_file | \
		awk -F = '{print $2}'`


	# The oid_idx must be increased by 1 since the oid index of the 
	# NagiosHpiloEngine is started from 1 rather than 0. 
	write_log "$NagiosLibexec/$NagiosHpiloEngine -H $1 -C $2 -o $((oid_idx))" 
	output=`$NagiosLibexec/$NagiosHpiloEngine -H $1 -C $2 -o $((oid_idx))`
	nagios_service_status=$?
	write_log "${HpiloServices[0]} nagios_service_status : $nagios_service_status - $output"
	IFS=';' read -a hlth_status_array <<< "$output"	
	hlth_array_count=${#hlth_status_array[@]}
	for ((xy=0;xy<${#HpiloServices[@]};xy++));do
		service_key=${HpiloServices[$xy]}
		case $service_key in
			"System Status") service_index=0 ;;
			"Fans") service_index=4 ;;
			"Memory") service_index=3 ;;
			"Network") service_index=14 ;;
			"Power Supplies") service_index=6 ;;
			"Processors") service_index=2 ;;
			"Storage") service_index=9 ;;
			"Temperatures") service_index=5 ;;
			*) ;; 
		esac

		write_log "hlth_array_count : $hlth_array_count"
		if [ $hlth_array_count = 1 ]; then
			status_key=${hlth_status_array[0]}
			status_value=3
			write_log "status_key : $status_key"
		else
			status_key=${hlth_status_array[$service_index]}
			case $status_key in
				"OK") status_value=0 ;;
				"Degraded") status_value=1 ;; 
				"Failed") status_value=2 ;;
				"NA" | "Other") status_value=3 ;;
				*) ;;
			esac
		fi

		if [ "$status_value" == "1" ] || [ "$status_value" == "2" ]; then
			case "$xy" in
				[1] | [4] | [6])
					status_key=`$NagiosLibexec/$NagiosHpiloEngine -H $1 -C $2 -o $((xy+1))`
					nagios_service_status=$?
					;;
				*)
					;;
			esac
		elif [ "$status_value" == "3" ]; then
			case "$xy" in
				3)
					status_key="Other: Probable Cause might be AMS service is not installed or started on host OS"
				;;
				4)
					status_key="Other: Verify status on OA for Power Supplies of blade server" 
				;;
				*)
				;;
 			esac
		fi
		if [ $curr_oid_idx = $xy ]; then
			curr_odi_status=$status_value
			curr_oid_disc="$status_key"
			continue
		fi
		nagios_passive_check "$1" "${HpiloServices[$xy]}" "$status_value" "$status_key"
		sleep 0.001
	done
	output=$curr_oid_disc
	nagios_service_status=$curr_odi_status
	write_log "5. $1 ${HpiloServices[0]} $nagios_service_status $output "

}


# $1: file name
# $2: search pattern
function search_string() {
local   str=

if [ -f $1 ]; then
	str=`grep "$2" -A 1 $1`
fi
echo $str
}

#start here

	VerboseMode=0
	ActiveMode=0
	

# parse the arguments
while [ "x$1" != "x" ]; do
	option=$1

	case $option in
		-H)

		# Get the Host IP
		shift

		host_ip=$1
		;;

		-C)
		# Get the community string
		shift
		comm_str=$1

		;;

		-o)
		# Get the OID
		shift
		oid_id=$1

		;;

		-v)
		# enable verbose mode
		VerboseMode=1
		;;
		
		-A)
		# Active mode: Get Health Status Array and Update to web page 
		ActiveMode=1
		;;
		*)
		echo "ERROR: unknown option $option"
		
		exit 1
		;;

	esac
	shift
done


if [ "$ActiveMode" = "0" ]
then

	read IloIP 
	read protocol

# Get the iLO trap ID 
	while read oid val
	do
		if [ "$oid" = "$SnmpTrapOid" ]; then
			# get the iLO trap ID
			IloTrapNumber=`echo $val | awk -F . '{print $NF}'`
			break;
		fi
	done


ServiceType=$(get_hlth_service_type $IloTrapNumber)

write_log "ilo_ip: $IloIP trap_number: $IloTrapNumber, type: $ServiceType"


NagiosIloCfgFile=$(get_nagios_ilo_cfg_path)
has_configured=$(search_string $NagiosIloCfgFile $IloIP)
if [ "x${has_configured}" != "x" ]; then
	comm_str_id=`echo $has_configured | awk '{print $3}'`
	if [ "x${comm_str_id}" != "x" ]; then
		HpiloSnmpComm=`echo $has_configured | awk '{print $4}'`
	fi
fi


if [ "$ServiceType" != "None" ]
then

	if [ "$ServiceType" != "$HlthStatusChgTrap" ]
	then
		update_hlth_status $IloIP $IloTrapNumber "$ServiceType" 
	fi

	# update system health status
	update_hlth_status $IloIP $IloTrapNumber "${HpiloServices[0]}"
fi
else

	write_log "host_ip : $host_ip  comm_str: $comm_str  oid_idx: $oid_id"
	#if [ "$oid_id" = "1" ]; then
	write_log "Active Schedule Mode"
		update_hlth_status_from_status_array $host_ip $comm_str $oid_id
		printf "$output\n"
		exit $nagios_service_status
	#fi
	
fi