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#!/bin/bash
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#!/bin/bash
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# $Id: alcasar-watchdog.sh 2008 2016-07-25 09:00:46Z raphael.pion $
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# $Id: alcasar-watchdog.sh 2075 2016-11-28 17:46:32Z richard $
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# alcasar-watchdog.sh
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# alcasar-watchdog.sh
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# by Rexy
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# by Rexy
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# This script is distributed under the Gnu General Public License (GPL)
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# This script is distributed under the Gnu General Public License (GPL)
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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 équipements réseau ne répondent plus ( si la fenetre status.php a été fermé. Les autorisations par adresse mac sont laissé de côté)
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# - les équipements réseau ne répondent plus ( si la fenetre status.php a été fermé. Les autorisations par adresse mac sont laissé de côté)
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# - les adresses MAC sont usurpées
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# - les adresses MAC sont usurpées
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# This script tells users that Internet access is down
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# This script tells users that Internet access is down
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# it logs out users whose
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# it logs out users whose
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# - PCs are quiet (it means that status.php has been closed. We put aside @MAC Authorization )
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# - PCs are quiet (it means that status.php has been closed. We put aside @MAC Authorization )
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# - MAC address is used by other systems (usurped)
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# - MAC address is used by other systems (usurped)
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CONF_FILE="/usr/local/etc/alcasar.conf"
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CONF_FILE="/usr/local/etc/alcasar.conf"
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EXTIF=`grep ^EXTIF= $CONF_FILE|cut -d"=" -f2` # EXTernal InterFace
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EXTIF=`grep ^EXTIF= $CONF_FILE|cut -d"=" -f2` # EXTernal InterFace
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INTIF=`grep ^INTIF= $CONF_FILE|cut -d"=" -f2` # INTernal InterFace
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INTIF=`grep ^INTIF= $CONF_FILE|cut -d"=" -f2` # INTernal InterFace
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private_ip_mask=`grep PRIVATE_IP= $CONF_FILE|cut -d"=" -f2`
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private_ip_mask=`grep PRIVATE_IP= $CONF_FILE|cut -d"=" -f2`
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private_ip_mask=${private_ip_mask:=192.168.182.1/24}
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private_ip_mask=${private_ip_mask:=192.168.182.1/24}
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PRIVATE_IP=`echo "$private_ip_mask" |cut -d"/" -f1` # @ip du portail (côté LAN)
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PRIVATE_IP=`echo "$private_ip_mask" |cut -d"/" -f1` # @ip du portail (côté LAN)
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PRIVATE_IP=${PRIVATE_IP:=192.168.182.1}
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PRIVATE_IP=${PRIVATE_IP:=192.168.182.1}
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tmp_file="/tmp/watchdog.txt"
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tmp_file="/tmp/watchdog.txt"
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tmp_users_file="/tmp/current_users.txt"
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tmp_users_file="/tmp/current_users.txt"
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DIR_WEB="/var/www/html"
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DIR_WEB="/var/www/html"
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Index_Page="$DIR_WEB/index.php"
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Index_Page="$DIR_WEB/index.php"
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IPTABLES="/sbin/iptables"
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IPTABLES="/sbin/iptables"
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TUNIF="tun0" # listen device for chilli daemon
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TUNIF="tun0" # listen device for chilli daemon
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OLDIFS=$IFS
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OLDIFS=$IFS
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IFS=$'\n'
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IFS=$'\n'
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function lan_down_alert ()
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function lan_down_alert ()
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# users are redirected on ALCASAR IP address if a LAN problem is detected
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# users are redirected on ALCASAR IP address if a LAN problem is detected
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{
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{
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case $LAN_DOWN in
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case $LAN_DOWN in
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"1")
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"1")
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logger "$EXTIF (WAN card) link down"
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logger "$EXTIF (WAN card) link down"
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echo "$EXTIF (WAN card) link down"
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echo "$EXTIF (WAN card) link down"
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/bin/sed -i "s?diagnostic =.*?diagnostic = \"$EXTIF (WAN card) link down\";?g" $Index_Page
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/bin/sed -i "s?diagnostic =.*?diagnostic = \"$EXTIF (WAN card) 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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echo "can't contact the default router"
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echo "can't contact the default router"
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/bin/sed -i "s?diagnostic =.*?diagnostic = \"can't contact the default router\";?g" $Index_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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esac
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esac
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net_pb=`grep "network_pb = True;" $Index_Page|wc -l`
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net_pb=`grep "network_pb = True;" $Index_Page|wc -l`
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if [ $net_pb = "0" ] # user alert (only the first time)
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if [ $net_pb = "0" ] # user alert (only the first time)
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then
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then
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/bin/sed -i "s?^\$network_pb.*?\$network_pb = True;?g" $Index_Page
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/bin/sed -i "s?^\$network_pb.*?\$network_pb = True;?g" $Index_Page
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$IPTABLES -I PREROUTING -t nat -i $TUNIF -p udp --dport domain -j REDIRECT --to-port 56
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$IPTABLES -I PREROUTING -t nat -i $TUNIF -p udp --dport domain -j REDIRECT --to-port 56
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fi
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fi
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}
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}
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function lan_test ()
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function lan_test ()
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# LAN connectiivity testing
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# LAN connectiivity testing
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{
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{
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watchdog_process=`ps -C alcasar-watchdog.sh|wc -l`
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watchdog_process=`ps -C alcasar-watchdog.sh|wc -l`
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if [[ $(expr $watchdog_process) -gt 3 ]]
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if [[ $(expr $watchdog_process) -gt 3 ]]
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then
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then
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echo "ALCASAR watchdog is already running"
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echo "ALCASAR watchdog is already running"
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exit 0
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exit 0
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fi
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fi
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# EXTIF testing
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# EXTIF testing
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LAN_DOWN="0"
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LAN_DOWN="0"
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if [ `/sbin/ip link | grep $EXTIF|grep "NO-CARRIER" | wc -l` -eq "1" ]
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if [ `/sbin/ip link | grep $EXTIF|grep "NO-CARRIER" | wc -l` -eq "1" ]
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then
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then
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LAN_DOWN="1"
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LAN_DOWN="1"
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fi
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fi
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# Default GW testing
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# Default GW testing
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if [ $LAN_DOWN -eq "0" ]
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if [ $LAN_DOWN -eq "0" ]
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then
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then
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IP_GW=`/sbin/ip route list|grep ^default|cut -d" " -f3`
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IP_GW=`/sbin/ip route list|grep ^default|cut -d" " -f3`
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arp_reply=`/usr/sbin/arping -I$EXTIF -c1 $IP_GW|grep response|cut -d" " -f2`
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arp_reply=`/usr/sbin/arping -I$EXTIF -c1 $IP_GW|grep response|cut -d" " -f2`
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if [ $arp_reply -eq "0" ]
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if [ $arp_reply -eq "0" ]
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then
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then
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LAN_DOWN="2"
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LAN_DOWN="2"
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fi
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fi
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fi
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fi
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# if LAN pb detected, users are warned
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# if LAN pb detected, users are warned
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if [ $LAN_DOWN != "0" ]
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if [ $LAN_DOWN != "0" ]
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then
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then
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lan_down_alert
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lan_down_alert
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# else switch in normal mode
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# else switch in normal mode
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else
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else
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echo "Internet access is OK for now"
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echo "Internet access is OK for now"
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net_pb=`grep "network_pb = True;" $Index_Page|wc -l`
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net_pb=`grep "network_pb = True;" $Index_Page|wc -l`
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if [ $net_pb != "0" ]
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if [ $net_pb != "0" ]
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then
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then
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/bin/sed -i "s?^\$network_pb.*?\$network_pb = False;?g" $Index_Page
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/bin/sed -i "s?^\$network_pb.*?\$network_pb = False;?g" $Index_Page
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$IPTABLES -D PREROUTING -t nat -i $TUNIF -p udp --dport domain -j REDIRECT --to-port 56
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$IPTABLES -D PREROUTING -t nat -i $TUNIF -p udp --dport domain -j REDIRECT --to-port 56
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fi
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fi
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fi
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fi
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}
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}
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usage="Usage: alcasar-watchdog.sh {-lt --lan_test}"
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usage="Usage: alcasar-watchdog.sh {-lt --lan_test}"
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case $1 in
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case $1 in
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-\? | -h* | --h*)
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-\? | -h* | --h*)
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echo "$usage"
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echo "$usage"
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exit 0
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exit 0
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;;
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;;
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-lt | --lan_test)
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-lt | --lan_test)
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lan_test
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lan_test
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exit 0
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exit 0
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;;
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;;
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*)
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*)
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lan_test
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lan_test
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# read file that contains IP address of user who are not in $tmp_users_file (its means that status.php has been closed)
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# read file that contains IP address of user who are not in $tmp_users_file (its means that status.php has been closed)
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if [ -e $tmp_file ]; then
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if [ -e $tmp_file ]; then
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cat $tmp_file | while read noresponse
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cat $tmp_file | while read noresponse
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do
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do
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noresponse_ip=`echo $noresponse | cut -d" " -f1`
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noresponse_ip=`echo $noresponse | cut -d" " -f1`
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noresponse_mac=`echo $noresponse | cut -d" " -f2`
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noresponse_mac=`echo $noresponse | cut -d" " -f2`
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noresponse_user=`echo $noresponse | cut -d" " -f3`
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noresponse_user=`echo $noresponse | cut -d" " -f3`
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data_user=$(/usr/sbin/chilli_query list | grep -v "\.0\.0\.0" | awk '$5 == 1' | grep $noresponse_ip)
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data_user=$(/usr/sbin/chilli_query list | grep -v "\.0\.0\.0" | awk '$5 == 1' | grep $noresponse_ip)
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if [ $(echo $data_users | wc -l) -eq 1 ] #if it still connected ...
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if [ $(echo $data_users | wc -l) -eq 1 ] #if it still connected ...
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then
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then
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if [[ $noresponse_user == $noresponse_mac ]] #we let @mac auth equipments connected
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if [[ $noresponse_user != $noresponse_mac ]] # we let @mac auth equipments connected
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then
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then
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#/usr/sbin/chilli_query dhcp-release $noresponse_mac # for @mac auth equipments, we must remove the arp entry
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echo "MAC authentification : $noresponse_mac (keep on connection)"
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else #we disconnect user because status.php has been closed
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logger "alcasar-watchdog $noresponse_ip ($noresponse_mac) can't be contact. Alcasar disconnects the user ($noresponse_user)."
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logger "alcasar-watchdog $noresponse_ip ($noresponse_mac) can't be contact. Alcasar disconnects the user ($noresponse_user)."
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echo "Disconnect : $noresponse_ip $noresponse_mac $noresponse_user"
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echo "Disconnect : $noresponse_ip $noresponse_mac $noresponse_user"
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/usr/sbin/chilli_query logout $noresponse_mac
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/usr/sbin/chilli_query logout $noresponse_mac
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fi
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fi
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fi
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fi
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done
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done
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rm $tmp_file
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rm $tmp_file
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if [ -e $tmp_users_file ]; then
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# if [ -e $tmp_users_file ]; then
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rm $tmp_users_file
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# rm $tmp_users_file
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fi
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# fi
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fi
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fi
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#this temporary file contains every 'user IP address' which are connected to ALCASAR (status.php still open)
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#this temporary file contains every 'user IP address' which are connected to ALCASAR (status.php still open)
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if [ -e $tmp_users_file ]; then
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if [ -e $tmp_users_file ]; then
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for ip_user in $(cat $tmp_users_file)
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for ip_user in $(cat $tmp_users_file)
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do
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do
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#Check if user is still connected
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#Check if user is still connected
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data_user=$(/usr/sbin/chilli_query list | grep -v "\.0\.0\.0" | awk '$5 == 1' | grep $ip_user)
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data_user=$(/usr/sbin/chilli_query list | grep -v "\.0\.0\.0" | awk '$5 == 1' | grep $ip_user)
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if [ $(echo $data_users | wc -l) -eq 0 ] #if user not in the file $tmp_users_file (it means that status.php has been closed)
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if [ $(echo $data_users | wc -l) -eq 0 ] #if user not in the file $tmp_users_file (it means that status.php has been closed)
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then
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then
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#save info in tmp_file
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#save info in tmp_file
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active_ip=`echo $data_user |cut -d" " -f2`
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active_ip=`echo $data_user |cut -d" " -f2`
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active_mac=`echo $data_user | cut -d" " -f1`
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active_mac=`echo $data_user | cut -d" " -f1`
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active_user=`echo $data_user |cut -d" " -f6`
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active_user=`echo $data_user |cut -d" " -f6`
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echo "$active_ip $active_mac $active_user" >> $tmp_file #save info for next time, user will be disconnected.
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echo "$active_ip $active_mac $active_user" >> $tmp_file #save info for next time, user will be disconnected.
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fi
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fi
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done
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done
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rm $tmp_users_file
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rm $tmp_users_file
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else
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else
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for system in $(/usr/sbin/chilli_query list |grep -v "\.0\.0\.0" | awk '$5 == 1')
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for system in $(/usr/sbin/chilli_query list |grep -v "\.0\.0\.0" | awk '$5 == 1')
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do
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do
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#disconnect all users
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#disconnect all users
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active_ip=`echo $system |cut -d" " -f2`
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active_ip=`echo $system |cut -d" " -f2`
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active_mac=`echo $system | cut -d" " -f1`
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active_mac=`echo $system | cut -d" " -f1`
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active_user=`echo $system |cut -d" " -f6`
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active_user=`echo $system |cut -d" " -f6`
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echo "$active_ip $active_mac $active_user" >> $tmp_file
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echo "$active_ip $active_mac $active_user" >> $tmp_file
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done
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done
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fi
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fi
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# process each equipment known by chilli to check if any equipment is usurped (@MAC)
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# process each equipment known by chilli to check if any equipment is usurped (@MAC)
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for system in `/usr/sbin/chilli_query list |grep -v "\.0\.0\.0"`
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for system in `/usr/sbin/chilli_query list |grep -v "\.0\.0\.0"`
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do
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do
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active_ip=`echo $system |cut -d" " -f2`
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active_ip=`echo $system |cut -d" " -f2`
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active_session=`echo $system |cut -d" " -f5`
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active_session=`echo $system |cut -d" " -f5`
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active_mac=`echo $system | cut -d" " -f1`
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active_mac=`echo $system | cut -d" " -f1`
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active_user=`echo $system |cut -d" " -f6`
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active_user=`echo $system |cut -d" " -f6`
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# process only equipment with an authenticated user
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# process only equipment with an authenticated user
|
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if [[ $(expr $active_session) -eq 1 ]]
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if [[ $(expr $active_session) -eq 1 ]]
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then
|
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then
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arp_reply=`/usr/sbin/arping -b -I$INTIF -s$PRIVATE_IP -c2 -w4 $active_ip|grep "Unicast reply"|wc -l`
|
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arp_reply=`/usr/sbin/arping -b -I$INTIF -s$PRIVATE_IP -c2 -w4 $active_ip|grep "Unicast reply"|wc -l`
|
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# disconnect users whose equipement is usurped (@MAC). For example, if there are 2 same @MAC it will make 3 lines in output.
|
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# disconnect users whose equipement is usurped (@MAC). For example, if there are 2 same @MAC it will make 3 lines in output.
|
179 |
if [[ $(expr $arp_reply) -gt 2 ]]
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if [[ $(expr $arp_reply) -gt 2 ]]
|
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then
|
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then
|
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echo "$(date "+[%x-%X] : ")alcasar-watchdog : $active_ip is usurped ($active_mac). Alcasar disconnect the user ($active_user)." >> /var/Save/security/watchdog.log
|
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echo "$(date "+[%x-%X] : ")alcasar-watchdog : $active_ip is usurped ($active_mac). Alcasar disconnect the user ($active_user)." >> /var/Save/security/watchdog.log
|
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logger "alcasar-watchdog : $active_ip is usurped ($active_mac). Alcasar disconnect the user ($active_user)."
|
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logger "alcasar-watchdog : $active_ip is usurped ($active_mac). Alcasar disconnect the user ($active_user)."
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/usr/sbin/chilli_query logout $active_mac
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/usr/sbin/chilli_query logout $active_mac
|
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chmod 644 /var/Save/security/watchdog.log
|
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chmod 644 /var/Save/security/watchdog.log
|
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fi
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fi
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fi
|
183 |
fi
|
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done
|
184 |
done
|
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;;
|
185 |
;;
|
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esac
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esac
|
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IFS=$OLDIFS
|
187 |
IFS=$OLDIFS
|
191 |
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