Subversion Repositories ALCASAR

#/bin/bash

# $Id: alcasar-bl.sh 1060 2013-03-31 18:10:30Z richard $

# alcasar-bl.sh

# by Franck BOUIJOUX and Richard REY

# This script is distributed under the Gnu General Public License (GPL)

# Gestion de la BL pour le filtrage de domaine (via dnsmasq) et d'URL (via Dansguardian)

# Manage the BL for DnsBlackHole (dnsmasq) and URL filtering (Dansguardian)

DIR_CONF="/usr/local/etc"

CONF_FILE="$DIR_CONF/alcasar.conf"

private_ip_mask=`grep PRIVATE_IP= $CONF_FILE|cut -d"=" -f2`

private_ip_mask=${private_ip_mask:=192.168.182.1/24}

PRIVATE_IP=`echo $private_ip_mask | cut -d"/" -f1`			# ALCASAR LAN IP address

DIR_tmp="/tmp/blacklists"

FILE_tmp="/tmp/filesfilter.txt"

FILE_ip_tmp="/tmp/filesipfilter.txt"

DIR_DG="/etc/dansguardian/lists"

DIR_DG_BL="$DIR_DG/blacklists"

BL_CATEGORIES="$DIR_CONF/alcasar-bl-categories"				# list of names of the 	BL categories

WL_CATEGORIES="$DIR_CONF/alcasar-wl-categories"				#'	'		WL	'

BL_CATEGORIES_ENABLED="$DIR_CONF/alcasar-bl-categories-enabled"		#	'	'	BL enabled categories

WL_CATEGORIES_ENABLED="$DIR_CONF/alcasar-wl-categories-enabled"		#	'	'	WL enabled categories

DIR_SHARE="/usr/local/share"

DIR_DNS_BL="$DIR_SHARE/dnsmasq-bl"					# all the BL in the DNSMASQ format

DIR_DNS_WL="$DIR_SHARE/dnsmasq-wl"					# all the WL	'	'	'

DIR_IP_BL="$DIR_SHARE/iptables-bl"					# all the IP addresses of the BL 

DIR_DNS_BL_ENABLED="$DIR_SHARE/dnsmasq-bl-enabled"			# symbolic link to the dnsmasq	BL (only enabled categories)

DIR_DNS_WL_ENABLED="$DIR_SHARE/dnsmasq-wl-enabled"			#	'	'	'	WL	'	'	'

DIR_IP_BL_ENABLED="$DIR_SHARE/iptables-bl-enabled"			#	'	'	ip BL (only enabled categories)	

BL_SERVER="dsi.ut-capitole.fr"

SED="/bin/sed -i"

# enable/disable the BL & WL categories

function cat_choice (){

	rm -rf $DIR_DNS_BL_ENABLED $DIR_DNS_WL_ENABLED $DIR_IP_BL_ENABLED # cleaning for dnsmasq and iptables

	$SED "/\.Include/d" $DIR_DG/bannedsitelist $DIR_DG/bannedurllist # cleaning for DG

	$SED "s?^[^#]?#&?g" $BL_CATEGORIES $WL_CATEGORIES # cleaning BL & WL categories file (comment all lines)

	mkdir $DIR_DNS_BL_ENABLED $DIR_DNS_WL_ENABLED $DIR_IP_BL_ENABLED 

	# process the file $BL_CATEGORIES with the choice of categories 

	for ENABLE_CATEGORIE in `cat $BL_CATEGORIES_ENABLED` 

	do

		$SED "/\/$ENABLE_CATEGORIE$/d" $BL_CATEGORIES 

		$SED "1i\/etc\/dansguardian\/lists\/blacklists\/$ENABLE_CATEGORIE" $BL_CATEGORIES

		ln -s $DIR_DNS_BL/$ENABLE_CATEGORIE.conf $DIR_DNS_BL_ENABLED/$ENABLE_CATEGORIE

		ln -s $DIR_IP_BL/$ENABLE_CATEGORIE $DIR_IP_BL_ENABLED/$ENABLE_CATEGORIE

		echo ".Include<$DIR_DG_BL/$ENABLE_CATEGORIE/domains>" >> $DIR_DG/bannedsitelist  # we let DG filters domain in order to prevent bypass by proxy http vpn ;-)

		echo ".Include<$DIR_DG_BL/$ENABLE_CATEGORIE/urls>" >> $DIR_DG/bannedurllist

	done

	sort +0.0 -0.2 $BL_CATEGORIES -o $FILE_tmp

	mv $FILE_tmp $BL_CATEGORIES

	# process the file $WL_CATEGORIES with the choice of categories 

	for ENABLE_CATEGORIE in `cat $WL_CATEGORIES_ENABLED` 

	do

		$SED "/\/$ENABLE_CATEGORIE$/d" $WL_CATEGORIES 

		$SED "1i\/etc\/dansguardian\/lists\/blacklists\/$ENABLE_CATEGORIE" $WL_CATEGORIES

		ln -s $DIR_DNS_WL/$ENABLE_CATEGORIE.conf $DIR_DNS_WL_ENABLED/$ENABLE_CATEGORIE

	done

	sort +0.0 -0.2 $WL_CATEGORIES -o $FILE_tmp

	mv $FILE_tmp $WL_CATEGORIES

}

function bl_enable (){

	$SED "s/^reportinglevel =.*/reportinglevel = 3/g" /etc/dansguardian/dansguardian.conf

	if [ "$PARENT_SCRIPT" != "alcasar-conf.sh" ] # don't launch on install stage

	then

		service dansguardian restart

		service dnsmasq restart

		/usr/local/bin/alcasar-iptables.sh

	fi

}

function bl_disable (){

	rm -rf $DIR_DNS_BL_ENABLED/*

	$SED "s/^reportinglevel =.*/reportinglevel = -1/g" /etc/dansguardian/dansguardian.conf

	if [ "$PARENT_SCRIPT" != "alcasar-conf.sh" ] # don't launch on install stage

	then

		service dansguardian restart

		service dnsmasq restart

		/usr/local/bin/alcasar-iptables.sh

	fi

}

usage="Usage: alcasar-bl.sh { -on or --on } | { -off or --off } | { -download or --download } | { -adapt or --adapt } | { -reload or --reload }"

nb_args=$#

args=$1

if [ $nb_args -eq 0 ]

then

	DNS_FILTERING=`grep DNS_FILTERING $CONF_FILE|cut -d"=" -f2`		# DNS and URLs filter (on/off)

	DNS_FILTERING=${DNS_FILTERING:=off}

	echo "Set BlackList Filtering to $DNS_FILTERING"

	if [ $DNS_FILTERING = on ]; then

		cat_choice

		bl_enable

	else

		bl_disable

	fi

	exit 0

fi

case $args in

	-\? | -h* | --h*)

		echo "$usage"

		exit 0

		;;

	# enable the filtering

	-on | --on)	

		cat_choice

		$SED "s?^DNS_FILTERING.*?DNS_FILTERING=on?g" $CONF_FILE

		bl_enable

		;;

	# disable the filtering

	-off | --off)

		$SED "s?^DNS_FILTERING.*?DNS_FILTERING=off?g" $CONF_FILE

		bl_disable

		;;

	# Retrieve Toulouse BL

	-download | --download)

		rm -rf /tmp/con_ok.html

		`/usr/bin/curl $BL_SERVER -# -o /tmp/con_ok.html`

		if [ ! -e /tmp/con_ok.html ]

		then

			echo "Erreur : le serveur de blacklist ($BL_SERVER) n'est pas joignable"

		else 

			rm -rf /tmp/con_ok.html $DIR_tmp

			mkdir $DIR_tmp

			wget -P $DIR_tmp http://$BL_SERVER/blacklists/download/blacklists.tar.gz

			md5sum $DIR_tmp/blacklists.tar.gz | cut -d" " -f1 > $DIR_tmp/md5sum

			chown -R apache:apache $DIR_tmp

		fi

		;;		

	# Adapt Toulouse BL to our structure (dnsmasq + DG)

	-adapt | --adapt)

		echo -n "Toulouse BlackList migration process. Please wait : "

		if [ -f $DIR_tmp/blacklists.tar.gz ]

		then

			[ -d $DIR_DG_BL/ossi ] && mv -f $DIR_DG_BL/ossi $DIR_tmp

			rm -rf $DIR_DG_BL

			mkdir $DIR_DG_BL

			tar zxf $DIR_tmp/blacklists.tar.gz --directory=$DIR_DG/

			[ -d $DIR_tmp/ossi ] && mv -f $DIR_tmp/ossi $DIR_DG_BL/

			rm -rf $DIR_tmp

		fi

		rm -f $BL_CATEGORIES $WL_CATEGORIES $WL_CATEGORIES_ENABLED

		rm -rf $DIR_DNS_BL $DIR_DNS_WL $DIR_IP_BL

		touch $BL_CATEGORIES $WL_CATEGORIES $WL_CATEGORIES_ENABLED

		mkdir $DIR_DNS_BL $DIR_DNS_WL $DIR_IP_BL

		chown -R dansguardian:apache $DIR_DG $BL_CATEGORIES $WL_CATEGORIES $BL_CATEGORIES_ENABLED $WL_CATEGORIES_ENABLED

		chmod -R g+w $DIR_DG $BL_CATEGORIES $WL_CATEGORIES $BL_CATEGORIES_ENABLED $WL_CATEGORIES_ENABLED

		find $DIR_DG_BL/ -type f -name domains > $FILE_tmp # retrieve directory name where a domain file exist

		$SED "s?\/domains??g" $FILE_tmp # remove "/domains" suffix

		for dir_categorie in `cat $FILE_tmp` # create the blacklist and the whitelist files

		do

			categorie=`echo $dir_categorie|cut -d "/" -f6`

			categorie_type=`grep -A1 ^NAME:[$' '$'\t']*$categorie $DIR_DG_BL/global_usage | grep ^DEFAULT_TYPE | cut -d":" -f2 | tr -d " \t"`

			if [ "$categorie_type" == "white" ]

			then

				echo "$dir_categorie" >> $WL_CATEGORIES 

				echo `basename $dir_categorie` >> $WL_CATEGORIES_ENABLED  # by default all WL are enabled 

			else

				echo "$dir_categorie" >> $BL_CATEGORIES

			fi

		done

		rm -f $FILE_tmp

		# Verify that the enabled categories are effectively in the BL (need after an update of the BL)

		for ENABLE_CATEGORIE in `cat $BL_CATEGORIES_ENABLED` 

		do

			ok=`grep /$ENABLE_CATEGORIE$ $BL_CATEGORIES|wc -l`

			if [ $ok != "1" ] 

			then

				$SED "/^$ENABLE_CATEGORIE$/d" $BL_CATEGORIES_ENABLED

			fi

		done

		# Creation of DNSMASQ BL and WL

		for LIST in $BL_CATEGORIES $WL_CATEGORIES	# for each list (bl and wl)

		do

			for PATH_FILE in `cat $LIST` # for each category

			do

				DOMAINE=`basename $PATH_FILE`

				echo -n "$DOMAINE, "

		  		if [ ! -f $PATH_FILE/urls ] # create 'urls' file if it doesn't exist

				then

					touch $PATH_FILE/urls

					chown dansguardian:apache $PATH_FILE/urls

				fi

				$SED "s/\.\{2,10\}/\./g" $PATH_FILE/domains $PATH_FILE/urls # correct some syntax errors

				# retrieve the ip addresses for iptables

				egrep  "([0-9]{1,3}\.){3}[0-9]{1,3}" $PATH_FILE/domains > $FILE_ip_tmp

				# for dnsmask, remove IP addesses, accented characters and commented lines.

				egrep  -v "([0-9]{1,3}\.){3}[0-9]{1,3}" $PATH_FILE/domains > $FILE_tmp

				$SED "/[äâëêïîöôüû]/d" $FILE_tmp

				$SED "/^#.*/d" $FILE_tmp

				# adapt to the dnsmasq syntax

				$SED "s?.*?address=/&/$PRIVATE_IP?g" $FILE_tmp 

				if [ "$LIST" == "$BL_CATEGORIES" ]

				then

					mv $FILE_tmp $DIR_DNS_BL/$DOMAINE.conf

					mv $FILE_ip_tmp $DIR_IP_BL/$DOMAINE

				else

					mv $FILE_tmp $DIR_DNS_WL/$DOMAINE.conf

				fi

			done

		done

		rm -f $FILE_tmp $FILE_ip_tmp

		echo

		;;

	# reload when categories are changed 

	-reload | --reload)

		# for DG

		chown -R dansguardian:apache $DIR_DG_BL/ossi

		chmod -R g+w $DIR_DG_BL/ossi

		cat_choice

		#  for dnsmasq (rehabited domain names)

		if [ `wc -w $DIR_DG/exceptionsitelist|cut -d " " -f1` != "0" ]

		then

			for i in `cat $DIR_DG/exceptionsitelist`

			do

				$SED "/$i/d" $DIR_DNS_BL/*

			done

		fi

		cp -f $DIR_DG_BL/ossi/domains $DIR_DNS_BL/ossi.conf

		$SED "s?.*?address=/&/$PRIVATE_IP?g" $DIR_DNS_BL/ossi.conf

		cp -f $DIR_DG_BL/ossi/domains_wl $DIR_DNS_WL/ossi.conf

		DNS_FILTERING=`grep DNS_FILTERING $CONF_FILE|cut -d"=" -f2`		# DNS and URLs filter (on/off)

		DNS_FILTERING=${DNS_FILTERING:=off}

		if [ $DNS_FILTERING = on ]; then

			bl_enable

		else

			bl_disable

		fi

		;;

	*)

		echo "Argument inconnu :$1";

		echo "$usage"

		exit 1

		;;

esac