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raphael.pi |
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#/bin/bash
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# alcasar-dhcp.sh
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# by Raphaël Pion
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# This script is distributed under the Gnu General Public License (GPL)
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# active ou desactive l'option NTP du DHCP sur le réseau de consultation
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# enable or disable the NTP option of DHCP service on consultation LAN
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#configuration files
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SED="/bin/sed -i"
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CHILLI_CONF_FILE="/etc/chilli.conf"
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ALCASAR_CONF_FILE="/usr/local/etc/alcasar.conf"
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#NTP parameters
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NTP_STATE=$(grep 'DHCP=' $ALCASAR_CONF_FILE | cut -d'=' -f2)
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CHILLI_NTP_IP=$(grep 'CHILLI_NTP_IP=' $ALCASAR_CONF_FILE | cut -d'=' -f2)
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usage="Usage: alcasar-chilli_ntp.sh {--on | -on} | {--off | -off} "
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nb_args=$#
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args=$1
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if [ $nb_args -eq 0 ]
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then
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echo "$usage"
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exit 1
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fi
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case $args in
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-\? | -h | --h)
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echo "$usage"
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exit 0
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;;
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--off|-off) # disable NTP options over DHCP of coovachilli
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$SED "s?^CHILLI_NTP_ENABLED.*?CHILLI_NTP_ENABLED=off?g" $ALCASAR_CONF_FILE
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$SED "s?.*dhcpopt\t.*?#dhcpopt\t\t$CHILLI_NTP_IP?g" $CHILLI_CONF_FILE
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#/usr/bin/systemctl restart chilli
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;;
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--on|-on) # enable NTP options over DHCP of coovachilli
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if [ $NTP_STATE == "on" ]
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then
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#DHCP Options : rfc2132
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#dhcp option value will be convert in hexa.
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#NTP option (or 'option 42') is like :
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#
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# Code Len Address 1 Address 2
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# +-----+-----+-----+-----+-----+-----+-----+-----+--
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# | 42 | n | a1 | a2 | a3 | a4 | a1 | a2 | ...
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# +-----+-----+-----+-----+-----+-----+-----+-----+--
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#
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#Code : 42 => 2a
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#Len : 4 => 04
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#Convert CHILLI_NTP_IP into hexadecimal value
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if [ $CHILLI_NTP_IP != "none" ]
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then
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a1=$( printf "%02x\n" $(cat /usr/local/etc/alcasar.conf | grep CHILLI_NTP_IP | cut -d'=' -f2 | cut -d'.' -f1))
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a2=$( printf "%02x\n" $(cat /usr/local/etc/alcasar.conf | grep CHILLI_NTP_IP | cut -d'=' -f2 | cut -d'.' -f2))
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a3=$( printf "%02x\n" $(cat /usr/local/etc/alcasar.conf | grep CHILLI_NTP_IP | cut -d'=' -f2 | cut -d'.' -f3))
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a4=$( printf "%02x\n" $(cat /usr/local/etc/alcasar.conf | grep CHILLI_NTP_IP | cut -d'=' -f2 | cut -d'.' -f4))
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HEXA_CHILLI_NTP_IP="2a04$a1$a2$a3$a4"
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$SED "s?.*dhcpopt.*?dhcpopt\t\t$HEXA_CHILLI_NTP_IP?g" $CHILLI_CONF_FILE
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$SED "s?^CHILLI_NTP_ENABLED.*?CHILLI_NTP_ENABLED=on?g" $ALCASAR_CONF_FILE
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/usr/bin/systemctl restart chilli
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else
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echo "Vous devez spécifier une addresse IP désignant votre serveur NTP"
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fi
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else
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echo "L'option NTP du DHCP de coovachilli ne peut pas s'activer. En effet le DHCP est 'off' sur ALCASAR"
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fi
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;;
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*)
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echo "Argument inconnu :$1";
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echo "$usage"
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exit 1
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;;
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esac
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