1,17 → 1,82 |
#/bin/sh |
#!/bin/sh |
# $Id$ |
# by rexy |
# Ce script permet de déconnecter les usagers dont |
# Ce script prévient les usagers de l'indisponibilité de l'accès Internet |
# il déconnecte les usagers dont |
# - les équipementis réseau ne répondent plus |
# - les adresses MAC sont usurpées |
# The aim of this script is to disconnect users whose |
# This script tells users that Internet access is down |
# it logs out users whose |
# - PCs are quiet |
# - MAC address are in used by other systems (usurped) |
|
EXTIF="eth0" |
INTIF="eth1" |
PRIVATE_IP="192.168.182.1" |
tmp_file="/tmp/watchdog.txt" |
Network_Pb_Page="/var/www/html/redirect/index-network-pb.php" |
IFS=$'\n' |
|
# Fonction appelée si un Pb de connectivité Internet |
# On fait pointer les usagers sur une page d'erreur |
function ext_down_alert () |
{ |
case $EXT_DOWN in |
"1") |
logger "eth0 link down" |
/bin/sed -i "s?diagnostic =.*?diagnostic = eth0 link down?g" $Network_Pb_Page |
;; |
"2") |
logger "can't contact the default router" |
/bin/sed -i "s?diagnostic =.*?diagnostic = can't contact the default router?g" $Network_Pb_Page |
;; |
"3") |
logger "can't contact the Internet DNS" |
/bin/sed -i "s?diagnostic =.*?diagnostic = can't contact the Internet DNS?g" $Network_Pb_Page |
;; |
esac |
net_pb=`cat /etc/dnsmasq.d/alcasar-dnsmasq.conf|grep "address=/#/"|wc -l` |
if [ $net_pb != "1" ] |
then |
rm -f /var/www/html/redirect/index.php |
ln -s /var/www/html/redirect/index-network-pb.php /var/www/html/redirect/index.php |
/bin/sed -i "s?^conf-dir=.*?address=\/#\/$PRIVATE_IP?g" /etc/dnsmasq.d/alcasar-dnsmasq.conf |
/etc/init.d/dnsmasq restart |
fi |
} |
|
# On teste la connectivité réseau |
# On teste l'état d'EXTIF |
EXT_DOWN="0" |
if [ "`/usr/sbin/ethtool $EXTIF|grep Link|cut -d' ' -f3`" != "yes" ] |
then |
EXT_DOWN="1" |
fi |
# si EXTIF ok, on teste la connectivité vers le routeur par défaut (Box FAI) |
if [ $EXT_DOWN -eq "0" ] |
then |
IP_GW=`/sbin/ip route list|grep ^default|cut -d" " -f3` |
arp_reply=`/usr/sbin/arping -I$EXTIF -c1 $IP_GW|grep response|cut -d" " -f2` |
if [ $arp_reply -eq "0" ] |
then |
EXT_DOWN="2" |
fi |
fi |
# si routeur OK, on teste la connectivité vers les DNS externes |
# + tard (EXT_DOWN=3) |
# si Pb réseau, on avertit les usagers |
if [ $EXT_DOWN != "0" ] |
then |
ext_down_alert |
else |
# sinon, on rebascule en mode normal |
net_pb=`cat /etc/dnsmasq.d/alcasar-dnsmasq.conf|grep "address=/#/"|wc -l` |
if [ $net_pb -eq "1" ] |
then |
/bin/sed -i "s?^address=\/#\/.*?conf-dir=/usr/local/etc/alcasar-dnsfilter-enabled?g" /etc/dnsmasq.d/alcasar-dnsmasq.conf |
/etc/init.d/dnsmasq restart |
fi |
fi |
# lecture du fichier contenant les adresses IP des stations muettes |
if [ -e $tmp_file ]; then |
cat $tmp_file | while read noresponse |
50,3 → 115,4 |
fi |
fi |
done |
|