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#!/bin/sh
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#!/bin/sh
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# $Id: alcasar-watchdog.sh 316 2010-11-14 22:25:53Z richard $
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# $Id: alcasar-watchdog.sh 360 2010-12-05 22:50:36Z richard $
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# by rexy
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# by rexy
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# Ce script prévient les usagers de l'indisponibilité de l'accès Internet
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# Ce script prévient les usagers de l'indisponibilité de l'accès Internet
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# il déconnecte les usagers dont
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# il déconnecte les usagers dont
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# - les équipementis réseau ne répondent plus
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# - les équipementis réseau ne répondent plus
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# - les adresses MAC sont usurpées
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# - les adresses MAC sont usurpées
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EXTIF="eth0"
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EXTIF="eth0"
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INTIF="eth1"
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INTIF="eth1"
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PRIVATE_IP="192.168.182.1"
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PRIVATE_IP="192.168.182.1"
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tmp_file="/tmp/watchdog.txt"
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tmp_file="/tmp/watchdog.txt"
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DIR_WEB="/var/www/html"
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DIR_WEB="/var/www/html"
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Network_Pb_Page="$DIR_WEB/index-network-pb.php"
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Index_Page="$DIR_WEB/index.php"
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Network_Deny_Page="$DIR_WEB/index-access-deny.php"
-
 
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IFS=$'\n'
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IFS=$'\n'
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# Fonction appelée si un Pb de connectivité Internet
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# Fonction appelée si un Pb de connectivité Internet
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# On fait pointer les usagers sur une page d'erreur
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# On fait pointer les usagers sur une page d'erreur
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function ext_down_alert ()
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function ext_down_alert ()
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{
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{
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	case $EXT_DOWN in
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	case $EXT_DOWN in
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	"1")
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	"1")
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		logger "eth0 link down"
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		logger "eth0 link down"
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		/bin/sed -i "s?diagnostic =.*?diagnostic = eth0 link down?g" $Network_Pb_Page
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		/bin/sed -i "s?diagnostic =.*?diagnostic = eth0 link down?g" $Index_Page
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		;;
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		;;
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	"2")
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	"2")
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		logger "can't contact the default router"
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		logger "can't contact the default router"
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		/bin/sed -i "s?diagnostic =.*?diagnostic = can't contact the default router?g" $Network_Pb_Page
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		/bin/sed -i "s?diagnostic =.*?diagnostic = can't contact the default router?g" $Index_Page
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		;;
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		;;
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	"3")
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	"3")
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		logger "can't contact the Internet DNS"
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		logger "can't contact the Internet DNS"
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		/bin/sed -i "s?diagnostic =.*?diagnostic = can't contact the Internet DNS?g" $Network_Pb_Page
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		/bin/sed -i "s?diagnostic =.*?diagnostic = can't contact the Internet DNS?g" $Index_Page
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		;;
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		;;
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	esac
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	esac
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	net_pb=`cat /etc/dnsmasq.d/alcasar-dnsmasq.conf|grep "address=/#/"|wc -l`
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	net_pb=`cat /etc/dnsmasq.d/alcasar-dnsmasq.conf|grep "address=/#/"|wc -l`
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	if [ $net_pb != "1" ]
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	if [ $net_pb != "1" ]
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		then
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		then
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		ln -sf $Network_Pb_Page $DIR_WEB/index.php
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		/bin/sed -i "s?^\$network_pb.*?\$network_pb = True;?g" $Index_Page
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		/bin/sed -i "s?^conf-dir=.*?address=\/#\/$PRIVATE_IP?g" /etc/dnsmasq.d/alcasar-dnsmasq.conf
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		/bin/sed -i "s?^conf-dir=.*?address=\/#\/$PRIVATE_IP?g" /etc/dnsmasq.d/alcasar-dnsmasq.conf
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		/etc/init.d/dnsmasq restart
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		/etc/init.d/dnsmasq restart
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	fi
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	fi
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}
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}
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	else
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	else
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# sinon, on rebascule en mode normal
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# sinon, on rebascule en mode normal
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	net_pb=`cat /etc/dnsmasq.d/alcasar-dnsmasq.conf|grep "address=/#/"|wc -l`
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	net_pb=`cat /etc/dnsmasq.d/alcasar-dnsmasq.conf|grep "address=/#/"|wc -l`
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	if [ $net_pb -eq "1" ]
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	if [ $net_pb -eq "1" ]
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		then
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		then
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		ln -sf $Network_Deny_Page $DIR_WEB/index.php
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		/bin/sed -i "s?^\$network_pb.*?\$network_pb = False;?g" $Index_Page
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		/bin/sed -i "s?^address=\/#\/.*?conf-dir=/usr/local/etc/alcasar-dnsfilter-enabled?g" /etc/dnsmasq.d/alcasar-dnsmasq.conf
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		/bin/sed -i "s?^address=\/#\/.*?conf-dir=/usr/local/etc/alcasar-dnsfilter-enabled?g" /etc/dnsmasq.d/alcasar-dnsmasq.conf
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		/etc/init.d/dnsmasq restart
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		/etc/init.d/dnsmasq restart
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	fi
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	fi
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fi
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fi
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# lecture du fichier contenant les adresses IP des stations muettes
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# lecture du fichier contenant les adresses IP des stations muettes