#!/bin/sh
#
# Copyright (c) 2009 Sven-Hendrik Haase
# Copyright (C) 2004 Jimmy Olsen
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; version 2 dated June,
# 1991.
#
# 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 the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
#
#
# Plugin to monitor packet loss
#
# Please note that sometimes it can take quite long for the plugin to return
# a value on a network with lots of packet loss.
# You therefore need to account for it by appending the following to your
# plugin-conf.d/munin-node. Remember to restart munin-node afterwards.
# Append the next 3 lines to plugin-conf.d/munin-node:
# [packetloss_*]
# timeout 60
# user root
#
# Parameters:
#
# 	ping_args      - Arguments to ping (default "-c 2")
# 	ping_args2     - Arguments after the host name (required for Solaris)
# 	ping           - Ping program to use
# 	host           - Host to ping
#
# Arguments for Solaris:
#      ping_args      -s
#      ping_args2     56 2
#
#%# family=manual

file_host=`basename $0 | sed 's/^packetloss_//g'`
host=${host:-${file_host:-www.google.com}}

if [ "$1" = "config" ]; then
	echo "graph_title Packet loss to $host (in %)"
	echo 'graph_args --upper-limit 100 -l 0'
	echo 'graph_vlabel %'
	echo 'graph_category network'
	echo 'graph_info This graph shows packet loss statistics.'
	echo "packetloss.label $host"
	echo "packetloss.info Packet loss statistics for $host."
	echo 'packetloss.draw LINE2'
	exit 0
fi

${ping:-ping} ${ping_args:-'-c 10'} ${host} ${ping_args2} | perl -n -e 'print "packetloss.value $1\n" if /(\d+)% packet loss/;'