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#!/bin/bash
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#!/bin/bash
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# $Id: alcasar-watchdog.sh 2106 2017-01-05 18:35:29Z richard $
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# $Id: alcasar-watchdog.sh 2107 2017-01-05 22:23:35Z raphael.pion $
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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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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=${PRIVATE_IP:=192.168.182.1}
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tmp_file="/tmp/watchdog.txt"
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tmp_file="/tmp/watchdog.txt"
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tmp_users_file="/tmp/current_users.txt"
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current_users_file="/tmp/current_users.txt"
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DIR_WEB="/var/www/html"
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DIR_WEB="/var/www/html"
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Index_Page="$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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		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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		if [ -e $tmp_file ]; then
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			cat $tmp_file | while read noresponse
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			do
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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_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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				if [ $(echo $data_users | wc -l) -eq 1 ] #if it still connected ...
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	       			then
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					if [[ $noresponse_user != $noresponse_mac ]] # we let @mac auth equipments connected
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						then
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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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						/usr/sbin/chilli_query logout $noresponse_mac
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					fi
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				fi
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- 
 
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			done
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			rm $tmp_file
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#			if [ -e $tmp_users_file ]; then
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#				rm $tmp_users_file
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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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		if [ -e $tmp_users_file ]; then
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			for ip_user in $(cat $tmp_users_file)
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			do
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				# Check if thses users are also connected for chilli
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				data_user=$(/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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				then
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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_mac=`echo $data_user | cut -d" " -f1`
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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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				fi
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			done
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			rm $tmp_users_file
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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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			do
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				#disconnect all users
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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_user=`echo $system |cut -d" " -f6`
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                                echo "$active_ip $active_mac $active_user" >> $tmp_file
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			done
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		fi
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		# We disconnect inactive users (its means that status.php has been closed)
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		# Each user inform about his connectivity by filling in /tmp/current_users.txt his own @IP
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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 $system |cut -d" " -f6`
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			#We disconnect inactive user here :
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			#We check if this is not an auth @MAC and if he is still connected
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			if [ "$active_user" != "$active_mac" ] && [ $(echo $system | awk '$5 == 1' | wc -c) -gt 1 ]; then
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				# If /tmp/current_user.txt exists ...
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				if [ -e $current_users_file ]; then
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					# We check if user @IP is in 'current_users.txt'
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					cmp_user_ok=$(cat $current_users_file | grep $active_ip | wc -w)
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					# If this @IP is not in this file, we disconnect this user.
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					if [ $cmp_user_ok -eq 0 ]; then
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						logger "alcasar-watchdog $active_ip ($active_mac) can't be contact. Alcasar disconnects the user ($active_user)."
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						echo "Disconnect : $active_ip $active_mac $active_user"
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						/usr/sbin/chilli_query logout $active_mac
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					fi
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					# We clean 'current_users.txt'. Every user need to inform their @IP everytime to prove thier connectivity.
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					sed -i 'd' $current_users_file
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				else # If /tmp/current_user.txt does not exists we disconnect every users.
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					logger "Le fichier /tmp/current_users.txt n'existe pas."
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					logger "alcasar-watchdog $active_ip ($active_mac) can't be contact. Alcasar disconnects the user ($active_user)."
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					echo "Disconnect : $active_ip $active_mac $active_user"
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					/usr/sbin/chilli_query logout $active_mac
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				fi
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			fi
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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 $active_ip|grep "Unicast reply"|wc -l`
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				# disconnect users whose equipement is usurped (@MAC). For example, if there are 2 same @MAC it will make 3 lines in output.
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				# disconnect users whose equipement is usurped (@MAC). For example, if there are 2 same @MAC it will make 3 lines in output.
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			fi
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			fi
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		done
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		done
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		;;
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		;;
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esac
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esac
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IFS=$OLDIFS
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IFS=$OLDIFS
- 
 
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