Subversion Repositories ALCASAR

#/bin/bash

# $Id: alcasar-bl.sh 878 2012-06-03 16:07:40Z 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/fileFilter.txt"

DIR_DG="/etc/dansguardian/lists"

DIR_DG_BL="$DIR_DG/blacklists"

BL_CATEGORIES="$DIR_CONF/alcasar-bl-categories"

WL_CATEGORIES="$DIR_CONF/alcasar-wl-categories"

BL_CATEGORIES_ENABLED="$DIR_CONF/alcasar-bl-categories-enabled"

DIR_DNS_FILTER_AVAILABLE="$DIR_CONF/alcasar-dnsfilter-available"

DIR_DNS_FILTER_ENABLED="$DIR_CONF/alcasar-dnsfilter-enabled"

BL_SERVER="dsi.ut-capitole.fr"

SED="/bin/sed -i"

# Permet d'activer/désactiver les catégories de la BL

function cat_choice (){

	# un peu de ménage

	rm -rf $DIR_DNS_FILTER_ENABLED/*

	$SED "/\.Include/d" $DIR_DG/bannedsitelist $DIR_DG/bannedurllist

	# on adapte le fichier $BL_CATEGORIES au choix de catégorie 

	$SED "s?^[^#]?#&?g" $BL_CATEGORIES # on commente ce qui ne l'est pas

	for ENABLE_CATEGORIE in `cat $BL_CATEGORIES_ENABLED` # on affecte les catégories à dansguardian et dnsmasq

	do

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

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

		ln -s $DIR_DNS_FILTER_AVAILABLE/$ENABLE_CATEGORIE.conf $DIR_DNS_FILTER_ENABLED/$ENABLE_CATEGORIE

		echo ".Include<$DIR_DG_BL/$ENABLE_CATEGORIE/domains>" >> $DIR_DG/bannedsitelist  # dansguardian s'occupe du contournement par proxy http ;-)

		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

}

function bl_enable (){

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

	if [ "$PARENT_SCRIPT" != "/usr/local/bin/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_FILTER_ENABLED/*

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

	if [ "$PARENT_SCRIPT" != "/usr/local/bin/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 } | { -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

		;;

	# activation du filtrage

	-on | --on)	

		cat_choice

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

		bl_enable

		;;

	# désactivation du filtrage

	-off | --off)

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

		bl_disable

		;;

	# Récupération de l'archive de la BL Toulouse

	-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

			cd $DIR_tmp

			wget http://$BL_SERVER/blacklists/download/blacklists.tar.gz

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

			cd /root

		fi

		;;		

	# Adaptation de la BL de Toulouse à notre structure (dnsmasq + DG)

	-adapt | --adapt)

		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

			chown -R dansguardian:apache $DIR_DG

			chmod -R g+w $DIR_DG

		fi

		rm -f $BL_CATEGORIES $WL_CATEGORIES $DIR_DNS_FILTER_AVAILABLE/*

		touch $BL_CATEGORIES $WL_CATEGORIES

		find $DIR_DG_BL/ -type f -name domains > $FILE_tmp # On récupère le nom des répertoire (catégories)

		$SED "s?\/domains??g" $FILE_tmp # On supprime le suffixe "/domains"

		for categorie in `cat $FILE_tmp` # creation des deux fichiers de categories (BL / WL)

		do

			if [ -e $categorie/usage ]

			then

				is_whitelist=`grep white $categorie/usage|wc -l`

			else

				is_whitelist=0 # si le fichier 'usage' n'existe pas, on considère que la catégorie est une BL

			fi

			if [ $is_whitelist -eq "0" ]

			then

				echo "$categorie" >> $BL_CATEGORIES

			else

				echo "$categorie" >> $WL_CATEGORIES

			fi

		done

		rm -f $FILE_tmp

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

		for PATH_FILE in `cat $BL_CATEGORIES`  # pour chaque catégorie

		do

			echo -n "."

		  	if [ ! -f $PATH_FILE/urls ] # on crée le fichier 'urls' s'il n'existe pas

			then

				touch $PATH_FILE/urls

				chown dansguardian:apache $PATH_FILE/urls

			fi

			# suppression des @IP, de caractères acccentués et des lignes commentées

			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

			$SED "s?.*?address=/&/$PRIVATE_IP?g" $FILE_tmp  # Mise en forme dnsmasq

			DOMAINE=`basename $PATH_FILE`

			mv $FILE_tmp $DIR_DNS_FILTER_AVAILABLE/$DOMAINE.conf

		done

		echo

		;;

	# regénération suite à modification du choix des catégories 

	-reload | --reload)

		# pour Dansguardian

		chown -R dansguardian:apache $DIR_DG_BL/ossi

		chmod -R g+w $DIR_DG_BL/ossi

		cat_choice

		# pour dnsmasq (noms de domaine réhabilités)

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

		then

			for i in `cat $DIR_DG/exceptionsitelist`

			do

				$SED "/$i/d" $DIR_DNS_FILTER_AVAILABLE/*

			done

		fi

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

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