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#!/bin/bash
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#!/bin/bash
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# $Id: alcasar-watchdog.sh 2113 2017-01-08 22:43:26Z richard $
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# $Id: alcasar-watchdog.sh 2250 2017-05-22 22:00:03Z tom.houdayer $
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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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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=${PRIVATE_IP:=192.168.182.1}
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current_users_file="/var/tmp/havp/current_users.txt" # file containing active users with their "status.php" tab open
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current_users_file="/var/tmp/havp/current_users.txt" # file containing active users with their "status.php" tab open
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DIR_WEB="/var/www/html"
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DIR_WEB="/var/www/html"
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Index_Page="$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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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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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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