#!/bin/sh
#
# Wildcard-plugin to monitor arp on interfaces. To monitor an
# interface, link arp_bsd_<interface> to this file. E.g.
#
#    ln -s /usr/local/share/munin/plugins/arp_bsd_ /usr/local/etc/munin/plugins/arp_bsd_vlanX
#
# ...will monitor arp on interface vlanX.
#
# Any device found in /sbin/ifconfig can be monitored.
#
# Bugs : This plugins has been tested extensively on FreeBSD only
#
# Author : Luc Duchosal <luc.duchosal (at) arcantel (dot) ch>
#
# Magic markers (optional - used by munin-config and some installation
# scripts):
#
#%# family=auto
#%# capabilities=autoconf suggest


INTERFACE=`basename $0 | sed 's/^arp_bsd_//g'`

if [ "$1" = "autoconf" ]; then
        if [ -x /sbin/ifconfig ]; then
                echo yes
                exit 0
        else
                echo "no (/sbin/ifconfig not found)"
                exit 0
        fi
fi

if [ "$1" = "suggest" ]; then
        if [ -x /sbin/ifconfig ]; then
                /sbin/ifconfig -a | /usr/bin/grep -E '^[a-z]' | /usr/bin/awk -F\: '{print $1;}'
                exit 0
        else
                exit 1
        fi
fi

if [ "$1" = "config" ]; then

        echo "graph_title $INTERFACE arp"
        echo 'graph_args --base 1000'
        echo 'graph_vlabel arp per ${graph_period}'
        echo 'graph_category network'
        echo 'arp.label arp'
        exit 0
fi

/usr/sbin/arp -an | /usr/bin/grep $INTERFACE  | /usr/bin/wc -l | /usr/bin/awk '{ print "arp.value", $1;}'