#!/bin/sh
#
# Plugin plotting the Percentage of time needed to reach each host on the way to a certain host
# Uses MTR http://www.bitwizard.nl/mtr/ to do the job
#
# Version: 1.0
# Author: tobias.geiger@vido.info
# Please email me bugs/suggestions
#
# Version: 1.1
# Author: charlie@evilforbeginners.com
# changed: munin eats 1 character ds-names. prefix with "hop_"
#
#
# HINT: Needs a bigger TIMEOUT-Value than the default (10) in /etc/munin/plugin-conf.d/munin-node ,
# e.g.:
#  [mtr100_*]
#  timeout 60
#
#
#
# Parameters:
#
#     config   (required)
#     autoconf (optional - only used by munin-config)
#
# Magic markers (optional - used by munin-config and some installation
# scripts):
#%# family=contrib
#%# capabilities=autoconf

totrace=`basename $0 | sed 's/^mtr100_//g'`

if [ "$1" = "autoconf" ]; then
    if ( mtr -nrc 1 localhost 2>/dev/null >/dev/null ); then
        echo yes
    else
        if [ $? -eq 127 ]
        then
            echo "no (mtr program not found - install the mtr(-tiny) package)"
        else
            echo no
        fi
    fi
    exit 0
exit 0
fi

dotrace() {

LC_ALL=C mtr -nrs 1024 -c 5 $totrace | grep -vi -E "^HOST:|^Start:" | LC_ALL=C  awk -v C=$1 -v SRC_HOSTNAME=$(hostname) ' {

label=$2
x=gsub("\\.","_",label)

count=NR
lab[count]=count
name[count]=$2
val[count]=$6
total+=$6
}

END {
    # Hard code the first hop (hop_0) as the local hostname
    if ( C != "config" ) { print "hop_0.value U" }
    if ( C == "config" ) { print "hop_0.label " SRC_HOSTNAME }
    if ( C == "config" ) { print "hop_0.draw AREA" }
    for (x=1; x<=count; x++) {
        value=(val[x]/total)*100
        if ( C != "config" ) { printf "%s.value %2.2f\n","hop_" lab[x],value }
        if ( C == "config" ) { print "hop_" lab[x] ".label " name[x] }
        if ( C == "config" ) { print "hop_" lab[x]".draw STACK" }
    }
}'
}

if [ "$1" = "config" ]; then
    echo 'graph_title Traceroute (%) to '$totrace
    echo 'graph_args --base 1000 -l 0 -u 100 -r'
    echo 'graph_vlabel ms (percentage)'
    echo 'graph_category network'
    echo 'graph_scale no'
    echo 'graph_period second'
    echo 'graph_info This graph shows the Percentage needed for each hop on the way to '$totrace
    dotrace config;
    exit 0
else
    dotrace;
fi