#!/bin/sh
#
# Plugin to monitor total ARP entries
#
#  Parameters understood:
#
#      config   (required)
#      autoconf (optional)
#
#  Made by Sven Hartge (sven AT svenhartge DOT de)
#

#%# family=contrib
#%# capabilities=autoconf

if [ "$1" = "autoconf" ]; then
    # Search for arp
    which arp >/dev/null 2>/dev/null || (echo "no (can't find arp binary)" && exit 1)

    # ...or success
    echo yes
    exit 0
fi



if [ "$1" = "config" ]; then
        echo 'graph_title ARP entries'
        echo 'graph_args --base 1000 -l 0'
        echo 'graph_vlabel Entries'
        echo 'graph_category network'
	echo 'graph_scale no'
        echo 'graph_info This graph shows the number of ARP entries registered by the system.'
	echo 'entries.label ARP entries'
	echo 'entries.draw LINE2'
	echo 'entries.type GAUGE'
	echo 'entries.info Number of ARP entries'
	exit 0
fi

arp -an | awk 'BEGIN { regex="<incomplete>";} { if (!match($4,regex)) { a[$4] }} END{for(i in a){n++};print "entries.value " n}'
