WebSVN – ALCASAR – Diff – /scripts/alcasar-watchdog.sh


#!/bin/bash
# $Id: alcasar-watchdog.sh 786 2012-01-02 22:50:31Z richard $
 
# alcasar-watchdog.sh
# by Richard REY
# This script is distributed under the Gnu General Public License (GPL)
 
# Ce script prévient les usagers de l'indisponibilité de l'accès Internet
# il déconnecte les usagers dont
# - les équipements réseau ne répondent plus
# - les adresses MAC sont usurpées
# 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"
macallowed_file="/usr/local/etc/alcasar-macallowed"
conf_file="/usr/local/etc/alcasar.conf"
private_ip_mask=`grep PRIVATE_IP= $conf_file|cut -d"=" -f2`
private_ip_mask=${private_ip_mask:=192.168.182.1/24}
PRIVATE_IP=`echo $private_ip_mask | cut -d"/" -f1`			# ALCASAR LAN IP address
tmp_file="/tmp/watchdog.txt"
DIR_WEB="/var/www/html"
Index_Page="$DIR_WEB/index.php"
OLDIFS=$IFS
IFS=$'\n'
 
function lan_down_alert ()
# users are redirected on ALCASAR IP address if LAN Pb detected
{
	case $LAN_DOWN in
	"1")
		logger "eth0 link down"
		/bin/sed -i "s?diagnostic =.*?diagnostic = \"eth0 link down\";?g" $Index_Page
		;;
	"2")
		logger "can't contact the default router"
		/bin/sed -i "s?diagnostic =.*?diagnostic = \"can't contact the default router\";?g" $Index_Page
		;;
	esac
	net_pb=`cat /etc/dnsmasq.conf|grep "address=/#/"|wc -l`
	if [ $net_pb = "0" ] # on alerte les usagers (si ce n'est pas déjà le cas).
		then
		/bin/sed -i "s?^\$network_pb.*?\$network_pb = True;?g" $Index_Page
		/bin/sed -i "s?^conf-dir=.*?address=\/#\/$PRIVATE_IP?g" /etc/dnsmasq-blackhole.conf
		/bin/sed -i "1i\address=\/#\/$PRIVATE_IP" /etc/dnsmasq.conf
		/etc/init.d/dnsmasq restart
	fi
}
 
function lan_test ()
# LAN connectiivity testing
{
	watchdog_process=`ps -C alcasar-watchdog.sh|wc -l`
	if [[ $(expr $watchdog_process) -gt 3 ]]
		then
		echo "ALCASAR watchdog is already running"
		exit 0
	fi
	# EXTIF testing
	LAN_DOWN="0"
	if [ "`/usr/sbin/ethtool $EXTIF|grep Link|cut -d' ' -f3`" != "yes" ]
		then
		LAN_DOWN="1"
	fi
	# Default GW testing
	if [ $LAN_DOWN -eq "0" ]
		then
		IP_GW=`/sbin/ip route list|grep ^default|cut -d" " -f3`
		arp_reply=`/usr/sbin/arping -I$EXTIF -c1 $IP_GW|grep response|cut -d" " -f2`
		if [ $arp_reply -eq "0" ]
	       		then
			LAN_DOWN="2"
		fi
	fi
	# if LAN pb detected, users are warned
	if [ $LAN_DOWN != "0" ]
		then
			lan_down_alert
	# else switch in normal mode
	else
		net_pb=`cat /etc/dnsmasq.conf|grep "address=/#/"|wc -l`
		if [ $net_pb != "0" ]
			then
			/bin/sed -i "s?^\$network_pb.*?\$network_pb = False;?g" $Index_Page
			/bin/sed -i "s?^address=\/#\/.*?conf-dir=/usr/local/etc/alcasar-dnsfilter-enabled?g" /etc/dnsmasq-blackhole.conf
			/bin/sed -i "/^address=/d" /etc/dnsmasq.conf
			/etc/init.d/dnsmasq restart
		fi
	fi
}
 
usage="Usage: alcasar-watchdog.sh {-lt --lan_test}"
case $1 in
	-\? | -h* | --h*)
		echo "$usage"
		exit 0
		;;
	-lt | --lan_test)
		lan_test
		exit 0
		;;
	*)
		lan_test
# lecture du fichier contenant les adresses IP des stations muettes
		if [ -e $tmp_file ]; then
			cat $tmp_file | while read noresponse
			do
				noresponse_ip=`echo $noresponse | cut -d" " -f1`
				noresponse_mac=`echo $noresponse | cut -d" " -f2`
				arp_reply=`/usr/sbin/arping -b -I$INTIF -s$PRIVATE_IP -c1 -w4 $noresponse_ip|grep response|cut -d" " -f2`
				if [[ $(expr $arp_reply) -eq 0 ]]
	       				then
					mac_allowed=`cat $macallowed_file |grep $noresponse_mac | wc -l`
					if [ $mac_allowed -eq 0 ]
						then
						logger "alcasar-watchdog $noresponse_ip ($noresponse_mac) can't be contact. Alcasar disconnects the user."
						/usr/sbin/chilli_query logout $noresponse_mac
					else
						logger "alcasar-watchdog $noresponse_ip ($noresponse_mac - macallowed) can't be contact. Alcasar release the IP address"
						/usr/sbin/chilli_query dhcp-release $noresponse_mac
					fi
				fi
			done
			rm $tmp_file
		fi
# on traite chaque équipements connus de chilli
		for system in `/usr/sbin/chilli_query list |grep -v "\.0\.0\.0"`
		do
			active_ip=`echo $system |cut -d" " -f2`
			active_session=`echo $system |cut -d" " -f5`
			active_mac=`echo $system | cut -d" " -f1`
# on ne traite que les équipements exploitées par un usager authentifié (test de 2 réponses en 4 secondes)
			if [[ $(expr $active_session) -eq 1 ]]
				then
				arp_reply=`/usr/sbin/arping -b -I$INTIF -s$PRIVATE_IP -c2 -w4 $active_ip|grep "Unicast reply"|wc -l`
# on stocke les adresses IP des stations muettes
				if [[ $(expr $arp_reply) -eq 0 ]]
	       				then
					echo "$active_ip $active_mac" >> $tmp_file
				fi
# on deconnecte l'usager d'une stations usurpée (@MAC)
				if [[ $(expr $arp_reply) -gt 2 ]]
	       				then
					logger "alcasar-watchdog : $active_ip is usurped ($active_mac). Alcasar disconnect the user."
					/usr/sbin/chilli_query logout $active_mac
				fi
			fi
		done
		;;
esac	
IFS=$OLDIFS
 

Rev 784	Rev 786
1	`#!/bin/bash`	1	`#!/bin/bash`
2	`# $Id: alcasar-watchdog.sh 784 2011-12-18 14:33:56Z richard $`	2	`# $Id: alcasar-watchdog.sh 786 2012-01-02 22:50:31Z richard $`
3		3
4	`# alcasar-watchdog.sh`	4	`# alcasar-watchdog.sh`
5	`# by Richard REY`	5	`# by Richard REY`
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		7
8	`# Ce script prévient les usagers de l'indisponibilité de l'accès Internet`	8	`# Ce script prévient les usagers de l'indisponibilité de l'accès Internet`
9	`# il déconnecte les usagers dont`	9	`# il déconnecte les usagers dont`
10	`# - les équipements réseau ne répondent plus`	10	`# - les équipements réseau ne répondent plus`
11	`# - les adresses MAC sont usurpées`	11	`# - les adresses MAC sont usurpées`
12	`# This script tells users that Internet access is down`	12	`# This script tells users that Internet access is down`
13	`# it logs out users whose`	13	`# it logs out users whose`
14	`# - PCs are quiet`	14	`# - PCs are quiet`
15	`# - MAC address are in used by other systems (usurped)`	15	`# - MAC address are in used by other systems (usurped)`
16		16
17	`EXTIF="eth0"`	17	`EXTIF="eth0"`
18	`INTIF="eth1"`	18	`INTIF="eth1"`
-		19	`macallowed_file="/usr/local/etc/alcasar-macallowed"`
-		20	`conf_file="/usr/local/etc/alcasar.conf"`
-		21	private_ip_mask=`grep PRIVATE_IP= $conf_file\|cut -d"=" -f2`
19	`PRIVATE_IP="192.168.182.1"`	22	`private_ip_mask=${private_ip_mask:=192.168.182.1/24}`
-		23	PRIVATE_IP=`echo $private_ip_mask \| cut -d"/" -f1` # ALCASAR LAN IP address
20	`tmp_file="/tmp/watchdog.txt"`	24	`tmp_file="/tmp/watchdog.txt"`
21	`DIR_WEB="/var/www/html"`	25	`DIR_WEB="/var/www/html"`
22	`Index_Page="$DIR_WEB/index.php"`	26	`Index_Page="$DIR_WEB/index.php"`
23	`OLDIFS=$IFS`	27	`OLDIFS=$IFS`
24	`IFS=$'\n'`	28	`IFS=$'\n'`
25		29
26	`function lan_down_alert ()`	30	`function lan_down_alert ()`
27	`# users are redirected on ALCASAR IP address if LAN Pb detected`	31	`# users are redirected on ALCASAR IP address if LAN Pb detected`
28	`{`	32	`{`
29	`case $LAN_DOWN in`	33	`case $LAN_DOWN in`
30	`"1")`	34	`"1")`
31	`logger "eth0 link down"`	35	`logger "eth0 link down"`
32	`/bin/sed -i "s?diagnostic =.*?diagnostic = \"eth0 link down\";?g" $Index_Page`	36	`/bin/sed -i "s?diagnostic =.*?diagnostic = \"eth0 link down\";?g" $Index_Page`
33	`;;`	37	`;;`
34	`"2")`	38	`"2")`
35	`logger "can't contact the default router"`	39	`logger "can't contact the default router"`
36	`/bin/sed -i "s?diagnostic =.*?diagnostic = \"can't contact the default router\";?g" $Index_Page`	40	`/bin/sed -i "s?diagnostic =.*?diagnostic = \"can't contact the default router\";?g" $Index_Page`
37	`;;`	41	`;;`
38	`esac`	42	`esac`
39	net_pb=`cat /etc/dnsmasq.conf\|grep "address=/#/"\|wc -l`	43	net_pb=`cat /etc/dnsmasq.conf\|grep "address=/#/"\|wc -l`
40	`if [ $net_pb = "0" ] # on alerte les usagers (si ce n'est pas déjà le cas).`	44	`if [ $net_pb = "0" ] # on alerte les usagers (si ce n'est pas déjà le cas).`
41	`then`	45	`then`
42	`/bin/sed -i "s?^\$network_pb.*?\$network_pb = True;?g" $Index_Page`	46	`/bin/sed -i "s?^\$network_pb.*?\$network_pb = True;?g" $Index_Page`
43	`/bin/sed -i "s?^conf-dir=.*?address=\/#\/$PRIVATE_IP?g" /etc/dnsmasq-blackhole.conf`	47	`/bin/sed -i "s?^conf-dir=.*?address=\/#\/$PRIVATE_IP?g" /etc/dnsmasq-blackhole.conf`
44	`/bin/sed -i "1i\address=\/#\/$PRIVATE_IP" /etc/dnsmasq.conf`	48	`/bin/sed -i "1i\address=\/#\/$PRIVATE_IP" /etc/dnsmasq.conf`
45	`/etc/init.d/dnsmasq restart`	49	`/etc/init.d/dnsmasq restart`
46	`fi`	50	`fi`
47	`}`	51	`}`
48		52
49	`function lan_test ()`	53	`function lan_test ()`
50	`# LAN connectiivity testing`	54	`# LAN connectiivity testing`
51	`{`	55	`{`
52	watchdog_process=`ps -C alcasar-watchdog.sh\|wc -l`	56	watchdog_process=`ps -C alcasar-watchdog.sh\|wc -l`
53	`if [[ $(expr $watchdog_process) -gt 3 ]]`	57	`if [[ $(expr $watchdog_process) -gt 3 ]]`
54	`then`	58	`then`
55	`echo "ALCASAR watchdog is already running"`	59	`echo "ALCASAR watchdog is already running"`
56	`exit 0`	60	`exit 0`
57	`fi`	61	`fi`
58	`# EXTIF testing`	62	`# EXTIF testing`
59	`LAN_DOWN="0"`	63	`LAN_DOWN="0"`
60	if [ "`/usr/sbin/ethtool $EXTIF\|grep Link\|cut -d' ' -f3`" != "yes" ]	64	if [ "`/usr/sbin/ethtool $EXTIF\|grep Link\|cut -d' ' -f3`" != "yes" ]
61	`then`	65	`then`
62	`LAN_DOWN="1"`	66	`LAN_DOWN="1"`
63	`fi`	67	`fi`
64	`# Default GW testing`	68	`# Default GW testing`
65	`if [ $LAN_DOWN -eq "0" ]`	69	`if [ $LAN_DOWN -eq "0" ]`
66	`then`	70	`then`
67	IP_GW=`/sbin/ip route list\|grep ^default\|cut -d" " -f3`	71	IP_GW=`/sbin/ip route list\|grep ^default\|cut -d" " -f3`
68	arp_reply=`/usr/sbin/arping -I$EXTIF -c1 $IP_GW\|grep response\|cut -d" " -f2`	72	arp_reply=`/usr/sbin/arping -I$EXTIF -c1 $IP_GW\|grep response\|cut -d" " -f2`
69	`if [ $arp_reply -eq "0" ]`	73	`if [ $arp_reply -eq "0" ]`
70	`then`	74	`then`
71	`LAN_DOWN="2"`	75	`LAN_DOWN="2"`
72	`fi`	76	`fi`
73	`fi`	77	`fi`
74	`# if LAN pb detected, users are warned`	78	`# if LAN pb detected, users are warned`
75	`if [ $LAN_DOWN != "0" ]`	79	`if [ $LAN_DOWN != "0" ]`
76	`then`	80	`then`
77	`lan_down_alert`	81	`lan_down_alert`
78	`# else switch in normal mode`	82	`# else switch in normal mode`
79	`else`	83	`else`
80	net_pb=`cat /etc/dnsmasq.conf\|grep "address=/#/"\|wc -l`	84	net_pb=`cat /etc/dnsmasq.conf\|grep "address=/#/"\|wc -l`
81	`if [ $net_pb != "0" ]`	85	`if [ $net_pb != "0" ]`
82	`then`	86	`then`
83	`/bin/sed -i "s?^\$network_pb.*?\$network_pb = False;?g" $Index_Page`	87	`/bin/sed -i "s?^\$network_pb.*?\$network_pb = False;?g" $Index_Page`
84	`/bin/sed -i "s?^address=\/#\/.*?conf-dir=/usr/local/etc/alcasar-dnsfilter-enabled?g" /etc/dnsmasq-blackhole.conf`	88	`/bin/sed -i "s?^address=\/#\/.*?conf-dir=/usr/local/etc/alcasar-dnsfilter-enabled?g" /etc/dnsmasq-blackhole.conf`
85	`/bin/sed -i "/^address=/d" /etc/dnsmasq.conf`	89	`/bin/sed -i "/^address=/d" /etc/dnsmasq.conf`
86	`/etc/init.d/dnsmasq restart`	90	`/etc/init.d/dnsmasq restart`
87	`fi`	91	`fi`
88	`fi`	92	`fi`
89	`}`	93	`}`
90		94
91	`usage="Usage: alcasar-watchdog.sh {-lt --lan_test}"`	95	`usage="Usage: alcasar-watchdog.sh {-lt --lan_test}"`
92	`case $1 in`	96	`case $1 in`
93	`-\? \| -h* \| --h*)`	97	`-\? \| -h* \| --h*)`
94	`echo "$usage"`	98	`echo "$usage"`
95	`exit 0`	99	`exit 0`
96	`;;`	100	`;;`
97	`-lt \| --lan_test)`	101	`-lt \| --lan_test)`
98	`lan_test`	102	`lan_test`
99	`exit 0`	103	`exit 0`
100	`;;`	104	`;;`
101	`*)`	105	`*)`
102	`lan_test`	106	`lan_test`
103	`# lecture du fichier contenant les adresses IP des stations muettes`	107	`# lecture du fichier contenant les adresses IP des stations muettes`
104	`if [ -e $tmp_file ]; then`	108	`if [ -e $tmp_file ]; then`
105	`cat $tmp_file \| while read noresponse`	109	`cat $tmp_file \| while read noresponse`
106	`do`	110	`do`
107	noresponse_ip=`echo $noresponse \| cut -d" " -f1`	111	noresponse_ip=`echo $noresponse \| cut -d" " -f1`
108	noresponse_mac=`echo $noresponse \| cut -d" " -f2`	112	noresponse_mac=`echo $noresponse \| cut -d" " -f2`
109	arp_reply=`/usr/sbin/arping -b -I$INTIF -s$PRIVATE_IP -c1 -w4 $noresponse_ip\|grep response\|cut -d" " -f2`	113	arp_reply=`/usr/sbin/arping -b -I$INTIF -s$PRIVATE_IP -c1 -w4 $noresponse_ip\|grep response\|cut -d" " -f2`
110	`if [[ $(expr $arp_reply) -eq 0 ]]`	114	`if [[ $(expr $arp_reply) -eq 0 ]]`
111	`then`	115	`then`
-		116	mac_allowed=`cat $macallowed_file \|grep $noresponse_mac \| wc -l`
-		117	`if [ $mac_allowed -eq 0 ]`
-		118	`then`
112	`logger "alcasar-watchdog $noresponse_ip ($noresponse_mac) can't be contact. Alcasar disconnects the user."`	119	`logger "alcasar-watchdog $noresponse_ip ($noresponse_mac) can't be contact. Alcasar disconnects the user."`
113	`/usr/sbin/chilli_query logout $noresponse_mac`	120	`/usr/sbin/chilli_query logout $noresponse_mac`
-		121	`else`
-		122	`logger "alcasar-watchdog $noresponse_ip ($noresponse_mac - macallowed) can't be contact. Alcasar release the IP address"`
-		123	`/usr/sbin/chilli_query dhcp-release $noresponse_mac`
-		124	`fi`
114	`fi`	125	`fi`
115	`done`	126	`done`
116	`rm $tmp_file`	127	`rm $tmp_file`
117	`fi`	128	`fi`
118	`# on traite chaque équipements connus de chilli`	129	`# on traite chaque équipements connus de chilli`
119	for system in `/usr/sbin/chilli_query list \|grep -v "\.0\.0\.0"`	130	for system in `/usr/sbin/chilli_query list \|grep -v "\.0\.0\.0"`
120	`do`	131	`do`
121	active_ip=`echo $system \|cut -d" " -f2`	132	active_ip=`echo $system \|cut -d" " -f2`
122	active_session=`echo $system \|cut -d" " -f5`	133	active_session=`echo $system \|cut -d" " -f5`
123	active_mac=`echo $system \| cut -d" " -f1`	134	active_mac=`echo $system \| cut -d" " -f1`
124	`# on ne traite que les équipements exploitées par un usager authentifié (test de 2 réponses en 4 secondes)`	135	`# on ne traite que les équipements exploitées par un usager authentifié (test de 2 réponses en 4 secondes)`
125	`if [[ $(expr $active_session) -eq 1 ]]`	136	`if [[ $(expr $active_session) -eq 1 ]]`
126	`then`	137	`then`
127	arp_reply=`/usr/sbin/arping -b -I$INTIF -s$PRIVATE_IP -c2 -w4 $active_ip\|grep "Unicast reply"\|wc -l`	138	arp_reply=`/usr/sbin/arping -b -I$INTIF -s$PRIVATE_IP -c2 -w4 $active_ip\|grep "Unicast reply"\|wc -l`
128	`# on stocke les adresses IP des stations muettes`	139	`# on stocke les adresses IP des stations muettes`
129	`if [[ $(expr $arp_reply) -eq 0 ]]`	140	`if [[ $(expr $arp_reply) -eq 0 ]]`
130	`then`	141	`then`
131	`echo "$active_ip $active_mac" >> $tmp_file`	142	`echo "$active_ip $active_mac" >> $tmp_file`
132	`fi`	143	`fi`
133	`# on deconnecte l'usager d'une stations usurpée (@MAC)`	144	`# on deconnecte l'usager d'une stations usurpée (@MAC)`
134	`if [[ $(expr $arp_reply) -gt 2 ]]`	145	`if [[ $(expr $arp_reply) -gt 2 ]]`
135	`then`	146	`then`
136	`logger "alcasar-watchdog : $active_ip is usurped ($active_mac). Alcasar disconnect the user."`	147	`logger "alcasar-watchdog : $active_ip is usurped ($active_mac). Alcasar disconnect the user."`
137	`/usr/sbin/chilli_query logout $active_mac`	148	`/usr/sbin/chilli_query logout $active_mac`
138	`fi`	149	`fi`
139	`fi`	150	`fi`
140	`done`	151	`done`
141	`;;`	152	`;;`
142	`esac`	153	`esac`
143	`IFS=$OLDIFS`	154	`IFS=$OLDIFS`
144		155

Subversion Repositories ALCASAR

(root)/scripts/alcasar-watchdog.sh @ 2682 – Rev 784 → 786