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


#!/bin/bash
# $Id: alcasar-watchdog.sh 787 2012-01-02 23:05:28Z 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 "Unicast reply"|wc -l`
				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 786	Rev 787
1	`#!/bin/bash`	1	`#!/bin/bash`
2	`# $Id: alcasar-watchdog.sh 786 2012-01-02 22:50:31Z richard $`	2	`# $Id: alcasar-watchdog.sh 787 2012-01-02 23:05:28Z 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"`	19	`macallowed_file="/usr/local/etc/alcasar-macallowed"`
20	`conf_file="/usr/local/etc/alcasar.conf"`	20	`conf_file="/usr/local/etc/alcasar.conf"`
21	private_ip_mask=`grep PRIVATE_IP= $conf_file\|cut -d"=" -f2`	21	private_ip_mask=`grep PRIVATE_IP= $conf_file\|cut -d"=" -f2`
22	`private_ip_mask=${private_ip_mask:=192.168.182.1/24}`	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	23	PRIVATE_IP=`echo $private_ip_mask \| cut -d"/" -f1` # ALCASAR LAN IP address
24	`tmp_file="/tmp/watchdog.txt"`	24	`tmp_file="/tmp/watchdog.txt"`
25	`DIR_WEB="/var/www/html"`	25	`DIR_WEB="/var/www/html"`
26	`Index_Page="$DIR_WEB/index.php"`	26	`Index_Page="$DIR_WEB/index.php"`
27	`OLDIFS=$IFS`	27	`OLDIFS=$IFS`
28	`IFS=$'\n'`	28	`IFS=$'\n'`
29		29
30	`function lan_down_alert ()`	30	`function lan_down_alert ()`
31	`# users are redirected on ALCASAR IP address if LAN Pb detected`	31	`# users are redirected on ALCASAR IP address if LAN Pb detected`
32	`{`	32	`{`
33	`case $LAN_DOWN in`	33	`case $LAN_DOWN in`
34	`"1")`	34	`"1")`
35	`logger "eth0 link down"`	35	`logger "eth0 link down"`
36	`/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`
37	`;;`	37	`;;`
38	`"2")`	38	`"2")`
39	`logger "can't contact the default router"`	39	`logger "can't contact the default router"`
40	`/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`
41	`;;`	41	`;;`
42	`esac`	42	`esac`
43	net_pb=`cat /etc/dnsmasq.conf\|grep "address=/#/"\|wc -l`	43	net_pb=`cat /etc/dnsmasq.conf\|grep "address=/#/"\|wc -l`
44	`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).`
45	`then`	45	`then`
46	`/bin/sed -i "s?^\$network_pb.*?\$network_pb = True;?g" $Index_Page`	46	`/bin/sed -i "s?^\$network_pb.*?\$network_pb = True;?g" $Index_Page`
47	`/bin/sed -i "s?^conf-dir=.*?address=\/#\/$PRIVATE_IP?g" /etc/dnsmasq-blackhole.conf`	47	`/bin/sed -i "s?^conf-dir=.*?address=\/#\/$PRIVATE_IP?g" /etc/dnsmasq-blackhole.conf`
48	`/bin/sed -i "1i\address=\/#\/$PRIVATE_IP" /etc/dnsmasq.conf`	48	`/bin/sed -i "1i\address=\/#\/$PRIVATE_IP" /etc/dnsmasq.conf`
49	`/etc/init.d/dnsmasq restart`	49	`/etc/init.d/dnsmasq restart`
50	`fi`	50	`fi`
51	`}`	51	`}`
52		52
53	`function lan_test ()`	53	`function lan_test ()`
54	`# LAN connectiivity testing`	54	`# LAN connectiivity testing`
55	`{`	55	`{`
56	watchdog_process=`ps -C alcasar-watchdog.sh\|wc -l`	56	watchdog_process=`ps -C alcasar-watchdog.sh\|wc -l`
57	`if [[ $(expr $watchdog_process) -gt 3 ]]`	57	`if [[ $(expr $watchdog_process) -gt 3 ]]`
58	`then`	58	`then`
59	`echo "ALCASAR watchdog is already running"`	59	`echo "ALCASAR watchdog is already running"`
60	`exit 0`	60	`exit 0`
61	`fi`	61	`fi`
62	`# EXTIF testing`	62	`# EXTIF testing`
63	`LAN_DOWN="0"`	63	`LAN_DOWN="0"`
64	if [ "`/usr/sbin/ethtool $EXTIF\|grep Link\|cut -d' ' -f3`" != "yes" ]	64	if [ "`/usr/sbin/ethtool $EXTIF\|grep Link\|cut -d' ' -f3`" != "yes" ]
65	`then`	65	`then`
66	`LAN_DOWN="1"`	66	`LAN_DOWN="1"`
67	`fi`	67	`fi`
68	`# Default GW testing`	68	`# Default GW testing`
69	`if [ $LAN_DOWN -eq "0" ]`	69	`if [ $LAN_DOWN -eq "0" ]`
70	`then`	70	`then`
71	IP_GW=`/sbin/ip route list\|grep ^default\|cut -d" " -f3`	71	IP_GW=`/sbin/ip route list\|grep ^default\|cut -d" " -f3`
72	arp_reply=`/usr/sbin/arping -I$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`
73	`if [ $arp_reply -eq "0" ]`	73	`if [ $arp_reply -eq "0" ]`
74	`then`	74	`then`
75	`LAN_DOWN="2"`	75	`LAN_DOWN="2"`
76	`fi`	76	`fi`
77	`fi`	77	`fi`
78	`# if LAN pb detected, users are warned`	78	`# if LAN pb detected, users are warned`
79	`if [ $LAN_DOWN != "0" ]`	79	`if [ $LAN_DOWN != "0" ]`
80	`then`	80	`then`
81	`lan_down_alert`	81	`lan_down_alert`
82	`# else switch in normal mode`	82	`# else switch in normal mode`
83	`else`	83	`else`
84	net_pb=`cat /etc/dnsmasq.conf\|grep "address=/#/"\|wc -l`	84	net_pb=`cat /etc/dnsmasq.conf\|grep "address=/#/"\|wc -l`
85	`if [ $net_pb != "0" ]`	85	`if [ $net_pb != "0" ]`
86	`then`	86	`then`
87	`/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`
88	`/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`
89	`/bin/sed -i "/^address=/d" /etc/dnsmasq.conf`	89	`/bin/sed -i "/^address=/d" /etc/dnsmasq.conf`
90	`/etc/init.d/dnsmasq restart`	90	`/etc/init.d/dnsmasq restart`
91	`fi`	91	`fi`
92	`fi`	92	`fi`
93	`}`	93	`}`
94		94
95	`usage="Usage: alcasar-watchdog.sh {-lt --lan_test}"`	95	`usage="Usage: alcasar-watchdog.sh {-lt --lan_test}"`
96	`case $1 in`	96	`case $1 in`
97	`-\? \| -h* \| --h*)`	97	`-\? \| -h* \| --h*)`
98	`echo "$usage"`	98	`echo "$usage"`
99	`exit 0`	99	`exit 0`
100	`;;`	100	`;;`
101	`-lt \| --lan_test)`	101	`-lt \| --lan_test)`
102	`lan_test`	102	`lan_test`
103	`exit 0`	103	`exit 0`
104	`;;`	104	`;;`
105	`*)`	105	`*)`
106	`lan_test`	106	`lan_test`
107	`# lecture du fichier contenant les adresses IP des stations muettes`	107	`# lecture du fichier contenant les adresses IP des stations muettes`
108	`if [ -e $tmp_file ]; then`	108	`if [ -e $tmp_file ]; then`
109	`cat $tmp_file \| while read noresponse`	109	`cat $tmp_file \| while read noresponse`
110	`do`	110	`do`
111	noresponse_ip=`echo $noresponse \| cut -d" " -f1`	111	noresponse_ip=`echo $noresponse \| cut -d" " -f1`
112	noresponse_mac=`echo $noresponse \| cut -d" " -f2`	112	noresponse_mac=`echo $noresponse \| cut -d" " -f2`
113	arp_reply=`/usr/sbin/arping -b -I$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 "Unicast reply"\|wc -l`
114	`if [[ $(expr $arp_reply) -eq 0 ]]`	114	`if [[ $(expr $arp_reply) -eq 0 ]]`
115	`then`	115	`then`
116	mac_allowed=`cat $macallowed_file \|grep $noresponse_mac \| wc -l`	116	mac_allowed=`cat $macallowed_file \|grep $noresponse_mac \| wc -l`
117	`if [ $mac_allowed -eq 0 ]`	117	`if [ $mac_allowed -eq 0 ]`
118	`then`	118	`then`
119	`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."`
120	`/usr/sbin/chilli_query logout $noresponse_mac`	120	`/usr/sbin/chilli_query logout $noresponse_mac`
121	`else`	121	`else`
122	`logger "alcasar-watchdog $noresponse_ip ($noresponse_mac - macallowed) can't be contact. Alcasar release the IP address"`	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`	123	`/usr/sbin/chilli_query dhcp-release $noresponse_mac`
124	`fi`	124	`fi`
125	`fi`	125	`fi`
126	`done`	126	`done`
127	`rm $tmp_file`	127	`rm $tmp_file`
128	`fi`	128	`fi`
129	`# on traite chaque équipements connus de chilli`	129	`# on traite chaque équipements connus de chilli`
130	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"`
131	`do`	131	`do`
132	active_ip=`echo $system \|cut -d" " -f2`	132	active_ip=`echo $system \|cut -d" " -f2`
133	active_session=`echo $system \|cut -d" " -f5`	133	active_session=`echo $system \|cut -d" " -f5`
134	active_mac=`echo $system \| cut -d" " -f1`	134	active_mac=`echo $system \| cut -d" " -f1`
135	`# 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)`
136	`if [[ $(expr $active_session) -eq 1 ]]`	136	`if [[ $(expr $active_session) -eq 1 ]]`
137	`then`	137	`then`
138	arp_reply=`/usr/sbin/arping -b -I$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`
139	`# on stocke les adresses IP des stations muettes`	139	`# on stocke les adresses IP des stations muettes`
140	`if [[ $(expr $arp_reply) -eq 0 ]]`	140	`if [[ $(expr $arp_reply) -eq 0 ]]`
141	`then`	141	`then`
142	`echo "$active_ip $active_mac" >> $tmp_file`	142	`echo "$active_ip $active_mac" >> $tmp_file`
143	`fi`	143	`fi`
144	`# on deconnecte l'usager d'une stations usurpée (@MAC)`	144	`# on deconnecte l'usager d'une stations usurpée (@MAC)`
145	`if [[ $(expr $arp_reply) -gt 2 ]]`	145	`if [[ $(expr $arp_reply) -gt 2 ]]`
146	`then`	146	`then`
147	`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."`
148	`/usr/sbin/chilli_query logout $active_mac`	148	`/usr/sbin/chilli_query logout $active_mac`
149	`fi`	149	`fi`
150	`fi`	150	`fi`
151	`done`	151	`done`
152	`;;`	152	`;;`
153	`esac`	153	`esac`
154	`IFS=$OLDIFS`	154	`IFS=$OLDIFS`
155		155

Subversion Repositories ALCASAR

(root)/scripts/alcasar-watchdog.sh @ 2864 – Rev 786 → 787