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#/bin/bash
# $Id: alcasar-bl.sh 1071 2013-04-14 19:58:17Z 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)
DNSMASQ_BL_CONF="/etc/dnsmasq-blackhole.conf" # conf file of dnsmasq-blackhole
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
$SED "/google/d" $DNSMASQ_BL_CONF # remove nosslsearch server
$SED "s?^[^#]?#&?g" $DIR_DG/urlregexplist # remove safe searching
$SED "s/^\*ip$/#*ip/g" $DIR_DG/bannedsitelist # remove pureip browsing
if [ "$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