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#/bin/sh
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# by rexy
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# Ce script permet de déconnecter les usagers dont
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# - les équipementis réseau ne répondent plus
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# - les adresses MAC sont usurpées
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# The aim of this script is to disconnect users whose
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# - PCs are quiet
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# - MAC address are in used by other systems (usurped)
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INTIF="eth1"
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PRIVATE_IP="192.168.182.1"
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tmp_file="/tmp/watchdog.txt"
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IFS=$'\n'
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# lecture du fichier contenant les adresses IP des stations muettes
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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 $noresponse | cut -d" " -f2`
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arp_reply=`/usr/sbin/arping -b -I$INTIF -s$PRIVATE_IP -c1 $noresponse_ip|grep response|cut -d" " -f2`
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if [[ $(expr $arp_reply) -eq 0 ]]
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then
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logger "alcasar-watchdog $noresponse_ip ($noresponse_mac) reste muette. On deconnecte."
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/usr/sbin/chilli_query logout $noresponse_mac
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fi
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done
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rm $tmp_file
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fi
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# on traite chaque équipements connus de chilli
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for system in `/usr/sbin/chilli_query list`
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do
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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_mac=`echo $system | cut -d" " -f1`
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# on ne traite que les équipements exploitées par un usager authentifié
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if [[ $(expr $active_session) -eq 1 ]]
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then
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arp_reply=`/usr/sbin/arping -b -I$INTIF -s$PRIVATE_IP -c2 $active_ip|grep response|cut -d" " -f2`
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# on stocke les adresses IP des stations muettes
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if [[ $(expr $arp_reply) -eq 0 ]]
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then
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echo "$active_ip $active_mac" >> $tmp_file
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fi
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# on deconnecte l'usager d'une stations usurpée (@MAC)
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if [[ $(expr $arp_reply) -gt 2 ]]
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then
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logger "alcasar-watchdog : $active_ip est usurpée ($active_mac). On deconnecte."
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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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done
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