Subversion Repositories ALCASAR

Rev

Rev 2106 | Rev 2108 | Go to most recent revision | Only display areas with differences | Ignore whitespace | Details | Blame | Last modification | View Log

Rev 2106 Rev 2107
1 
#!/bin/bash
 1 
#!/bin/bash
2 
# $Id: alcasar-watchdog.sh 2106 2017-01-05 18:35:29Z richard $
 2 
# $Id: alcasar-watchdog.sh 2107 2017-01-05 22:23:35Z raphael.pion $
3 
 
 3 
 
4 
# alcasar-watchdog.sh
 4 
# alcasar-watchdog.sh
5 
# by Rexy
 5 
# by Rexy
6 
# This script is distributed under the Gnu General Public License (GPL)
 6 
# This script is distributed under the Gnu General Public License (GPL)
7 
# Ce script prévient les usagers de l'indisponibilité de l'accès Internet
 7 
# Ce script prévient les usagers de l'indisponibilité de l'accès Internet
8 
# il déconnecte les usagers dont
 8 
# il déconnecte les usagers dont
9 
# - les équipements réseau ne répondent plus ( si la fenetre status.php a été fermé. Les autorisations par adresse mac sont laissé de côté)
 9 
# - les équipements réseau ne répondent plus ( si la fenetre status.php a été fermé. Les autorisations par adresse mac sont laissé de côté)
10 
# - les adresses MAC sont usurpées
 10 
# - les adresses MAC sont usurpées
11 
# This script tells users that Internet access is down
 11 
# This script tells users that Internet access is down
12 
# it logs out users whose
12 
# it logs out users whose
13 
# - PCs are quiet (it means that status.php has been closed. We put aside @MAC Authorization )
 13 
# - PCs are quiet (it means that status.php has been closed. We put aside @MAC Authorization )
14 
# - MAC address is used by other systems (usurped)
 14 
# - MAC address is used by other systems (usurped)
15 
 
 15 
 
16 
CONF_FILE="/usr/local/etc/alcasar.conf"
 16 
CONF_FILE="/usr/local/etc/alcasar.conf"
17 
EXTIF=`grep ^EXTIF= $CONF_FILE|cut -d"=" -f2`			# EXTernal InterFace
 17 
EXTIF=`grep ^EXTIF= $CONF_FILE|cut -d"=" -f2`			# EXTernal InterFace
18 
INTIF=`grep ^INTIF= $CONF_FILE|cut -d"=" -f2`			# INTernal InterFace
 18 
INTIF=`grep ^INTIF= $CONF_FILE|cut -d"=" -f2`			# INTernal InterFace
19 
private_ip_mask=`grep PRIVATE_IP= $CONF_FILE|cut -d"=" -f2`
 19 
private_ip_mask=`grep PRIVATE_IP= $CONF_FILE|cut -d"=" -f2`
20 
private_ip_mask=${private_ip_mask:=192.168.182.1/24}
 20 
private_ip_mask=${private_ip_mask:=192.168.182.1/24}
21 
PRIVATE_IP=`echo "$private_ip_mask" |cut -d"/" -f1`      # @ip du portail (côté LAN)
 21 
PRIVATE_IP=`echo "$private_ip_mask" |cut -d"/" -f1`      # @ip du portail (côté LAN)
22 
PRIVATE_IP=${PRIVATE_IP:=192.168.182.1}
 22 
PRIVATE_IP=${PRIVATE_IP:=192.168.182.1}
23 
tmp_file="/tmp/watchdog.txt"
 23 
tmp_file="/tmp/watchdog.txt"
24 
tmp_users_file="/tmp/current_users.txt"
 24 
current_users_file="/tmp/current_users.txt"
25 
DIR_WEB="/var/www/html"
 25 
DIR_WEB="/var/www/html"
26 
Index_Page="$DIR_WEB/index.php"
 26 
Index_Page="$DIR_WEB/index.php"
27 
IPTABLES="/sbin/iptables"
 27 
IPTABLES="/sbin/iptables"
28 
TUNIF="tun0"						# listen device for chilli daemon
 28 
TUNIF="tun0"						# listen device for chilli daemon
29 
OLDIFS=$IFS
 29 
OLDIFS=$IFS
30 
IFS=$'\n'
 30 
IFS=$'\n'
31 
 
 31 
 
32 
function lan_down_alert ()
 32 
function lan_down_alert ()
33 
# users are redirected on ALCASAR IP address if a LAN problem is detected
 33 
# users are redirected on ALCASAR IP address if a LAN problem is detected
34 
{
 34 
{
35 
	case $LAN_DOWN in
 35 
	case $LAN_DOWN in
36 
	"1")
 36 
	"1")
37 
		logger "$EXTIF (WAN card) link down"
 37 
		logger "$EXTIF (WAN card) link down"
38 
		echo "$EXTIF (WAN card) link down"
 38 
		echo "$EXTIF (WAN card) link down"
39 
		/bin/sed -i "s?diagnostic =.*?diagnostic = \"$EXTIF (WAN card) link down\";?g" $Index_Page
 39 
		/bin/sed -i "s?diagnostic =.*?diagnostic = \"$EXTIF (WAN card) link down\";?g" $Index_Page
40 
		;;
 40 
		;;
41 
	"2")
 41 
	"2")
42 
		logger "can't contact the default router"
 42 
		logger "can't contact the default router"
43 
		echo "can't contact the default router"
 43 
		echo "can't contact the default router"
44 
		/bin/sed -i "s?diagnostic =.*?diagnostic = \"can't contact the default router\";?g" $Index_Page
 44 
		/bin/sed -i "s?diagnostic =.*?diagnostic = \"can't contact the default router\";?g" $Index_Page
45 
		;;
 45 
		;;
46 
	esac
 46 
	esac
47 
	net_pb=`grep "network_pb = True;" $Index_Page|wc -l`
 47 
	net_pb=`grep "network_pb = True;" $Index_Page|wc -l`
48 
	if [ $net_pb = "0" ] # user alert (only the first time)
48 
	if [ $net_pb = "0" ] # user alert (only the first time)
49 
		then
 49 
		then
50 
		/bin/sed -i "s?^\$network_pb.*?\$network_pb = True;?g" $Index_Page
 50 
		/bin/sed -i "s?^\$network_pb.*?\$network_pb = True;?g" $Index_Page
51 
		$IPTABLES -I PREROUTING -t nat -i $TUNIF -p udp --dport domain -j REDIRECT --to-port 56
 51 
		$IPTABLES -I PREROUTING -t nat -i $TUNIF -p udp --dport domain -j REDIRECT --to-port 56
52 
	fi
 52 
	fi
53 
}
 53 
}
54 
 
 54 
 
55 
function lan_test ()
 55 
function lan_test ()
56 
# LAN connectiivity testing
 56 
# LAN connectiivity testing
57 
{
 57 
{
58 
	watchdog_process=`ps -C alcasar-watchdog.sh|wc -l`
 58 
	watchdog_process=`ps -C alcasar-watchdog.sh|wc -l`
59 
	if [[ $(expr $watchdog_process) -gt 3 ]]
 59 
	if [[ $(expr $watchdog_process) -gt 3 ]]
60 
		then
 60 
		then
61 
		echo "ALCASAR watchdog is already running"
 61 
		echo "ALCASAR watchdog is already running"
62 
		exit 0
 62 
		exit 0
63 
	fi
 63 
	fi
64 
	# EXTIF testing
 64 
	# EXTIF testing
65 
	LAN_DOWN="0"
 65 
	LAN_DOWN="0"
66 
	if [ `/sbin/ip link | grep $EXTIF|grep "NO-CARRIER" | wc -l` -eq "1" ]
 66 
	if [ `/sbin/ip link | grep $EXTIF|grep "NO-CARRIER" | wc -l` -eq "1" ]
67 
		then
 67 
		then
68 
		LAN_DOWN="1"
 68 
		LAN_DOWN="1"
69 
	fi
 69 
	fi
70 
	# Default GW testing
 70 
	# Default GW testing
71 
	if [ $LAN_DOWN -eq "0" ]
 71 
	if [ $LAN_DOWN -eq "0" ]
72 
		then
 72 
		then
73 
		IP_GW=`/sbin/ip route list|grep ^default|cut -d" " -f3`
 73 
		IP_GW=`/sbin/ip route list|grep ^default|cut -d" " -f3`
74 
		arp_reply=`/usr/sbin/arping -I$EXTIF -c1 $IP_GW|grep response|cut -d" " -f2`
 74 
		arp_reply=`/usr/sbin/arping -I$EXTIF -c1 $IP_GW|grep response|cut -d" " -f2`
75 
		if [ $arp_reply -eq "0" ]
 75 
		if [ $arp_reply -eq "0" ]
76 
	       		then
 76 
	       		then
77 
			LAN_DOWN="2"
 77 
			LAN_DOWN="2"
78 
		fi
 78 
		fi
79 
	fi
 79 
	fi
80 
	# if LAN pb detected, users are warned
 80 
	# if LAN pb detected, users are warned
81 
	if [ $LAN_DOWN != "0" ]
 81 
	if [ $LAN_DOWN != "0" ]
82 
		then
 82 
		then
83 
			lan_down_alert
 83 
			lan_down_alert
84 
	# else switch in normal mode
 84 
	# else switch in normal mode
85 
	else
 85 
	else
86 
		echo "Internet access is OK for now"
 86 
		echo "Internet access is OK for now"
87 
		net_pb=`grep "network_pb = True;" $Index_Page|wc -l`
 87 
		net_pb=`grep "network_pb = True;" $Index_Page|wc -l`
88 
		if [ $net_pb != "0" ]
 88 
		if [ $net_pb != "0" ]
89 
			then
 89 
			then
90 
			/bin/sed -i "s?^\$network_pb.*?\$network_pb = False;?g" $Index_Page
 90 
			/bin/sed -i "s?^\$network_pb.*?\$network_pb = False;?g" $Index_Page
91 
			$IPTABLES -D PREROUTING -t nat -i $TUNIF -p udp --dport domain -j REDIRECT --to-port 56
 91 
			$IPTABLES -D PREROUTING -t nat -i $TUNIF -p udp --dport domain -j REDIRECT --to-port 56
92 
		fi
 92 
		fi
93 
	fi
 93 
	fi
94 
}
 94 
}
95 
 
 95 
 
96 
usage="Usage: alcasar-watchdog.sh {-lt --lan_test}"
 96 
usage="Usage: alcasar-watchdog.sh {-lt --lan_test}"
97 
case $1 in
 97 
case $1 in
98 
	-\? | -h* | --h*)
 98 
	-\? | -h* | --h*)
99 
		echo "$usage"
 99 
		echo "$usage"
100 
		exit 0
 100 
		exit 0
101 
		;;
 101 
		;;
102 
	-lt | --lan_test)
 102 
	-lt | --lan_test)
103 
		lan_test
 103 
		lan_test
104 
		exit 0
 104 
		exit 0
105 
		;;
 105 
		;;
106 
	*)
 106 
	*)
107 
		lan_test
 107 
		lan_test
108 
		# read file that contains IP address of user who are not in $tmp_users_file (its means that status.php has been closed)
 - 
 
109 
		if [ -e $tmp_file ]; then
 - 
 
110 
			cat $tmp_file | while read noresponse
 - 
 
111 
			do
 - 
 
112 
				noresponse_ip=`echo $noresponse | cut -d" " -f1`
 - 
 
113 
				noresponse_mac=`echo $noresponse | cut -d" " -f2`
 - 
 
114 
				noresponse_user=`echo $noresponse | cut -d" " -f3`
 - 
 
115 
				data_user=$(/usr/sbin/chilli_query list | grep -v "\.0\.0\.0" | awk '$5 == 1' | grep $noresponse_ip)
 - 
 
116 
				if [ $(echo $data_users | wc -l) -eq 1 ] #if it still connected ...
 - 
 
117 
	       			then
 - 
 
118 
					if [[ $noresponse_user != $noresponse_mac ]] # we let @mac auth equipments connected
 - 
 
119 
						then
- 
 
120 
						logger "alcasar-watchdog $noresponse_ip ($noresponse_mac) can't be contact. Alcasar disconnects the user ($noresponse_user)."
 - 
 
121 
						echo "Disconnect : $noresponse_ip $noresponse_mac $noresponse_user"
 - 
 
122 
						/usr/sbin/chilli_query logout $noresponse_mac
 - 
 
123 
					fi
 - 
 
124 
				fi
 - 
 
125
- 
 
126 
			done
 - 
 
127 
			rm $tmp_file
 - 
 
128 
#			if [ -e $tmp_users_file ]; then
 - 
 
129 
#				rm $tmp_users_file
 - 
 
130 
#			fi
 - 
 
131 
 
 - 
 
132 
		fi
 - 
 
133 
 
 - 
 
134 
		# this temporary file contains every 'user IP address' which are connected to ALCASAR (status.php still open)
 - 
 
135 
		if [ -e $tmp_users_file ]; then
- 
 
136 
			for ip_user in $(cat $tmp_users_file)
 - 
 
137 
			do
 - 
 
138 
				# Check if thses users are also connected for chilli
 - 
 
139 
				data_user=$(/usr/sbin/chilli_query list | grep -v "\.0\.0\.0" | awk '$5 == 1' | grep $ip_user)
 - 
 
140 
				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)
 - 
 
141 
				then
 - 
 
142 
					#save info in tmp_file
 - 
 
143 
					active_ip=`echo $data_user |cut -d" " -f2`
 - 
 
144 
		                        active_mac=`echo $data_user | cut -d" " -f1`
 - 
 
145 
		                        active_user=`echo $data_user |cut -d" " -f6`
 - 
 
146 
					echo "$active_ip $active_mac $active_user" >> $tmp_file #save info for next time, user will be disconnected.
 - 
 
147 
				fi
 - 
 
148 
			done
 - 
 
149 
			rm $tmp_users_file
 - 
 
150 
		else
 - 
 
151 
			for system in $(/usr/sbin/chilli_query list |grep -v "\.0\.0\.0" | awk '$5 == 1')
 - 
 
152 
			do
 - 
 
153 
				#disconnect all users
 - 
 
154 
                                active_ip=`echo $system |cut -d" " -f2`
 - 
 
155 
                                active_mac=`echo $system | cut -d" " -f1`
 - 
 
156 
                                active_user=`echo $system |cut -d" " -f6`
 - 
 
157 
                                echo "$active_ip $active_mac $active_user" >> $tmp_file
 - 
 
158 
			done
 - 
 
159 
		fi
 - 
 
160 
 
 - 
 
161 
 
 108 
 
- 
 
 109 
		# We disconnect inactive users (its means that status.php has been closed)
- 
 
 110 
		# Each user inform about his connectivity by filling in /tmp/current_users.txt his own @IP
162 
		# process each equipment known by chilli to check if any equipment is usurped (@MAC)
 111 
		# process each equipment known by chilli to check if any equipment is usurped (@MAC)
163 
		for system in `/usr/sbin/chilli_query list |grep -v "\.0\.0\.0"`
 112 
		for system in `/usr/sbin/chilli_query list |grep -v "\.0\.0\.0"`
164 
		do
 113 
		do
165 
			active_ip=`echo $system |cut -d" " -f2`
 114 
			active_ip=`echo $system |cut -d" " -f2`
166 
			active_session=`echo $system |cut -d" " -f5`
 115 
			active_session=`echo $system |cut -d" " -f5`
167 
			active_mac=`echo $system | cut -d" " -f1`
 116 
			active_mac=`echo $system | cut -d" " -f1`
168 
			active_user=`echo $system |cut -d" " -f6`
 117 
			active_user=`echo $system |cut -d" " -f6`
- 
 
 118
- 
 
 119 
			#We disconnect inactive user here :
- 
 
 120 
			#We check if this is not an auth @MAC and if he is still connected
- 
 
 121 
			if [ "$active_user" != "$active_mac" ] && [ $(echo $system | awk '$5 == 1' | wc -c) -gt 1 ]; then
- 
 
 122 
				# If /tmp/current_user.txt exists ...
- 
 
 123 
				if [ -e $current_users_file ]; then
- 
 
 124 
					# We check if user @IP is in 'current_users.txt'
- 
 
 125 
					cmp_user_ok=$(cat $current_users_file | grep $active_ip | wc -w)
- 
 
 126 
					# If this @IP is not in this file, we disconnect this user.
- 
 
 127 
					if [ $cmp_user_ok -eq 0 ]; then
- 
 
 128 
						logger "alcasar-watchdog $active_ip ($active_mac) can't be contact. Alcasar disconnects the user ($active_user)."
- 
 
 129 
						echo "Disconnect : $active_ip $active_mac $active_user"
- 
 
 130 
						/usr/sbin/chilli_query logout $active_mac
- 
 
 131 
					fi
- 
 
 132 
					# We clean 'current_users.txt'. Every user need to inform their @IP everytime to prove thier connectivity.
- 
 
 133 
					sed -i 'd' $current_users_file
- 
 
 134 
				else # If /tmp/current_user.txt does not exists we disconnect every users.
- 
 
 135 
					logger "Le fichier /tmp/current_users.txt n'existe pas."
- 
 
 136 
					logger "alcasar-watchdog $active_ip ($active_mac) can't be contact. Alcasar disconnects the user ($active_user)."
- 
 
 137 
					echo "Disconnect : $active_ip $active_mac $active_user"
- 
 
 138 
					/usr/sbin/chilli_query logout $active_mac
- 
 
 139 
				fi
- 
 
 140 
			fi
- 
 
 141 
 
- 
 
 142 
 
- 
 
 143 
 
169 
			# process only equipment with an authenticated user
 144 
			# process only equipment with an authenticated user
170 
			if [[ $(expr $active_session) -eq 1 ]]
 145 
			if [[ $(expr $active_session) -eq 1 ]]
171 
			then
 146 
			then
172 
				arp_reply=`/usr/sbin/arping -b -I$INTIF -s$PRIVATE_IP -c2 -w4 $active_ip|grep "Unicast reply"|wc -l`
 147 
				arp_reply=`/usr/sbin/arping -b -I$INTIF -s$PRIVATE_IP -c2 -w4 $active_ip|grep "Unicast reply"|wc -l`
173 
				# disconnect users whose equipement is usurped (@MAC). For example, if there are 2 same @MAC it will make 3 lines in output.
 148 
				# disconnect users whose equipement is usurped (@MAC). For example, if there are 2 same @MAC it will make 3 lines in output.
174 
				if [[ $(expr $arp_reply) -gt 2 ]]
 149 
				if [[ $(expr $arp_reply) -gt 2 ]]
175 
	       				then
150 
	       				then
176 
					echo "$(date "+[%x-%X] : ")alcasar-watchdog : $active_ip is usurped ($active_mac). Alcasar disconnect the user ($active_user)." >> /var/Save/security/watchdog.log
 151 
					echo "$(date "+[%x-%X] : ")alcasar-watchdog : $active_ip is usurped ($active_mac). Alcasar disconnect the user ($active_user)." >> /var/Save/security/watchdog.log
177 
					logger "alcasar-watchdog : $active_ip is usurped ($active_mac). Alcasar disconnect the user ($active_user)."
 152 
					logger "alcasar-watchdog : $active_ip is usurped ($active_mac). Alcasar disconnect the user ($active_user)."
178 
					/usr/sbin/chilli_query logout $active_mac
 153 
					/usr/sbin/chilli_query logout $active_mac
179 
					chmod 644 /var/Save/security/watchdog.log
 154 
					chmod 644 /var/Save/security/watchdog.log
180 
				fi
 155 
				fi
181 
			fi
 156 
			fi
182 
		done
 157 
		done
183 
		;;
 158 
		;;
184 
esac
159 
esac
185 
IFS=$OLDIFS
 160 
IFS=$OLDIFS
- 
 
 161 
 
186 
 
 162