#!/bin/bash
#
# Wildcard-plugin to monitor IP addresses through iptables. To monitor an
# IP, link fwbuilder_<ipaddress> to this file. E.g.
#
#    ln -s /usr/share/node/node/plugins-auto/fwbuilder_ /etc/munin/node.d/fwbuilder_192.168.0.1
#
# ...will monitor the IP 192.168.0.1.
#
# Aditionally, you need Accountingrules in fwbuilder
#	fwbuilder creates Chains in INPUT-, OUTPUT- and FORWARD-Chain
#	with Rules that "RETURN"
#	You will have to specify rule options with name "ACCOUNTING" for the 
#	rules to use, otherwise no rules will be found.
#	try "fwbuilder_ suggest" to see if all is ok. 
#    
#
# Furthermore, this plugin needs to be run as root for iptables to work
#
# This plugin is based on the if_ plugin.
#
#$Log$
#Revision 2.1 2007/05/01 08:36:32 ga
# changed to use rulename ACCOUNTING set in fwbuilder
#
#Revision 2.0 2007/04/01 08:41:54 ga
#copied ip_ to fwbuilder_ and changed to usee Rules from it
#some things rewritten to speed up
#
#Revision 1.7  2004/12/10 10:47:49  jimmyo
#Change name from ${scale} to ${graph_period}, to be more consistent.
#
#Revision 1.6  2004/12/09 22:12:56  jimmyo
#Added "graph_period" option, to make "graph_sums" usable.
#
#Revision 1.5  2004/11/21 00:17:12  jimmyo
#Changed a lot of plugins so they use DERIVE instead of COUNTER.
#
#Revision 1.4  2004/09/10 23:06:30  jimmyo
#Added accidentally deleted exit.
#
#Revision 1.3  2004/09/10 23:02:22  jimmyo
#Plugin linux/ip_ now does more proper autoconfig/suggest.
#
#Revision 1.2  2004/05/20 13:57:12  jimmyo
#Set categories to some of the plugins.
#
#Revision 1.1  2004/05/16 16:28:40  jimmyo
#Linux/ip_ wildcard plugin contributed by Mathy Vanvoorden (SF#954851).
#
#
# Magic markers (optional - used by munin-config and some installation
# scripts):
#
#%# family=auto
#%# capabilities=autoconf suggest
exec 2>/dev/null

IP=${0/*fwbuilder_/}
IP=${IP/-/\/}

if [ "$1" = "autoconf" ]; then
	if [ -r /proc/net/dev ]; then
		iptables -L INPUT -v -n -x >/dev/null 2>/dev/null
		if [ $? -gt 0 ]; then
			echo "no (could not run iptables as user `whoami`)"
			exit 1
		else
			echo yes
			exit 0
		fi
	else
		echo "no (/proc/net/dev not found)"
		exit 1
	fi
fi

if [ "$1" = "suggest" ]; then
	# find Chains for Accounting
	iptables -L -n |grep ^ACCOUNTING |awk '{printf "%s\n%s\n",$4,$5}'| sort -u |sed 's#\/#-#'
	exit 0
fi

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

        echo "graph_order out in"
        echo "graph_title $IP traffic"
        echo 'graph_args --base 1024'
        echo 'graph_vlabel bytes per ${graph_period}'
	echo 'graph_category fw'
        echo 'out.label sent'
        echo 'out.type DERIVE'
        echo 'out.min 0'
        echo 'out.cdef out,8,*'
        echo 'in.label received'
        echo 'in.type DERIVE'
        echo 'in.min 0'
        echo 'in.cdef in,8,*' 
        exit 0
fi;

echo "in.value $(( $(iptables -L -n -v -x |grep "ACCOUNTING" |awk '{printf "%s %s\n",$2,$9}' |grep $IP |awk '{printf "%s + ",$1}') 0 ))"
echo "out.value $(( $(iptables -L -n -v -x |grep "ACCOUNTING" |awk '{printf "%s %s\n",$2,$8}' |grep $IP |awk '{printf "%s + ",$1}') 0 ))"