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# enable or disable the DHCP service on consultation LAN
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# enable or disable the DHCP service on consultation LAN
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SED="/bin/sed -i"
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SED="/bin/sed -i"
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CHILLI_CONF_FILE="/etc/chilli.conf"
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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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ALCASAR_CONF_FILE="/usr/local/etc/alcasar.conf"
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DNSMASQ_CONF_FILE="/etc/dnsmasq.conf"
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ETHERS_FILE="/usr/local/etc/alcasar-ethers"
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ETHERS_FILE="/usr/local/etc/alcasar-ethers"
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# define DHCP parameters (LAN side)
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PRIVATE_IP_MASK=`grep PRIVATE_IP $ALCASAR_CONF_FILE|cut -d"=" -f2`
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PRIVATE_IP_MASK=`grep PRIVATE_IP $ALCASAR_CONF_FILE|cut -d"=" -f2`
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PRIVATE_IP=`echo $PRIVATE_IP_MASK | cut -d"/" -f1`
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PRIVATE_IP=`echo $PRIVATE_IP_MASK | cut -d"/" -f1`
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PRIVATE_PREFIX=`/bin/ipcalc -p $PRIVATE_IP_MASK |cut -d"=" -f2`				# network prefix (ie. 24)
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PRIVATE_NETMASK=`/bin/ipcalc -m $PRIVATE_IP_MASK | cut -d"=" -f2`
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PRIVATE_NETMASK=`/bin/ipcalc -m $PRIVATE_IP_MASK | cut -d"=" -f2`
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PRIVATE_PREFIX=`/bin/ipcalc -p $PRIVATE_IP $PRIVATE_NETMASK |cut -d"=" -f2`
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PRIVATE_NETWORK=`/bin/ipcalc -n $PRIVATE_IP $PRIVATE_NETMASK| cut -d"=" -f2`
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PRIVATE_NETWORK=`/bin/ipcalc -n $PRIVATE_IP $PRIVATE_NETMASK| cut -d"=" -f2`
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PRIVATE_PREFIX=`/bin/ipcalc -p $PRIVATE_IP $PRIVATE_NETMASK |cut -d"=" -f2`
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PRIVATE_NETWORK_MASK=$PRIVATE_NETWORK/$PRIVATE_PREFIX					# ie.: 192.168.182.0/24
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classe=$((PRIVATE_PREFIX/8)); classe_sup=`expr $classe + 1`; classe_sup_sup=`expr $classe + 2`		# ie.: 2=classe B, 3=classe C
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PRIVATE_BROADCAST=`/bin/ipcalc -b $PRIVATE_NETWORK_MASK | cut -d"=" -f2`		# private network broadcast (ie.: 192.168.182.255)
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private_network_ending=`echo $PRIVATE_NETWORK | cut -d"." -f$classe_sup`		# last octet of LAN address
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private_broadcast_ending=`echo $PRIVATE_BROADCAST | cut -d"." -f$classe_sup`		# last octet of LAN broadcast
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PRIVATE_FIRST_IP=`echo $PRIVATE_NETWORK | cut -d"." -f1-3`"."`expr $private_network_ending + 1`		# First network address (ex.: 192.168.182.1)
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PRIVATE_LAST_IP=`echo $PRIVATE_BROADCAST | cut -d"." -f1-3`"."`expr $private_broadcast_ending - 1`	# last network address (ex.: 192.168.182.254)
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PRIVATE_NETWORK_MASK=$PRIVATE_NETWORK/$PRIVATE_PREFIX
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PRIVATE_NETWORK_MASK=$PRIVATE_NETWORK/$PRIVATE_PREFIX
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tmp_mask=`echo $PRIVATE_NETWORK_MASK|cut -d"/" -f2`; half_mask=`expr $tmp_mask + 1`	# masque du 1/2 réseau de consultation (ex.: 25)
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PRIVATE_STAT_IP=$PRIVATE_NETWORK/$half_mask						# plage des adresses statiques (ex.: 192.168.182.0/25)
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private_network_ending=`echo $PRIVATE_NETWORK | cut -d"." -f$classe_sup`		# dernier octet de l'@ de réseau
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private_broadcast_ending=`echo $PRIVATE_BROADCAST | cut -d"." -f$classe_sup`		# dernier octet de l'@ de broadcast
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private_plage=`expr $private_broadcast_ending - $private_network_ending + 1`
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private_half_plage=`expr $private_plage / 2`
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private_dyn=`expr $private_half_plage + $private_network_ending`
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private_dyn_ip_network=`echo $PRIVATE_NETWORK | cut -d"." -f1-$classe`"."$private_dyn"."`echo $PRIVATE_NETWORK | cut -d"." -f$classe_sup_sup-5`
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PRIVATE_DYN_IP=`echo $private_dyn_ip_network | cut -d"." -f1-4`/$half_mask					# @ réseau (CIDR) de la plage des adresses dynamiques (ex.: 192.168.182.128/25)
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private_dyn_ip_ending=`echo $private_dyn_ip_network | cut -d"." -f4`
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PRIVATE_DYN_FIRST_IP=`echo $private_dyn_ip_network | cut -d"." -f1-3`"."`expr $private_dyn_ip_ending + 1`	# 1ère adresse de la plage dynamique (ex.: 192.168.182.129)
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PRIVATE_DYN_LAST_IP=`echo $PRIVATE_BROADCAST | cut -d"." -f1-3`"."`expr $private_broadcast_ending - 1`		# dernière adresse de la plage dynamique (ex.: 192.168.182.254)
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usage="Usage: alcasar-dhcp.sh {--on | -on} | {--off | -off}"
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usage="Usage: alcasar-dhcp.sh {--full | -full} | {--off | -off} | {--half | -half}"
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nb_args=$#
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nb_args=$#
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args=$1
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args=$1
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if [ $nb_args -eq 0 ]
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if [ $nb_args -eq 0 ]
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then
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then
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	echo "$usage"
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	echo "$usage"
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	exit 1
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	exit 1
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fi
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fi
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case $args in
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case $args in
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	-\? | -h* | --h*)
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	-\? | -h | --h)
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		echo "$usage"
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		echo "$usage"
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		exit 0
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		exit 0
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		;;
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		;;
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	--off|-off) # disable DHCP service
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	--off|-off) # disable DHCP service
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		$SED "s?^#statip.*?statip\t\t$PRIVATE_NETWORK_MASK?g" $CHILLI_CONF_FILE
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		$SED "s?.*statip.*?statip\t\t$PRIVATE_NETWORK_MASK?g" $CHILLI_CONF_FILE
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		$SED "s?^#nodynip.*?nodynip?g" $CHILLI_CONF_FILE
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		$SED "s?^#nodynip.*?nodynip?g" $CHILLI_CONF_FILE
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		$SED "s?^dynip.*?#dynip?g" $CHILLI_CONF_FILE
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		$SED "s?^#dynip.*?#dynip?g" $CHILLI_CONF_FILE
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		$SED "s?^ethers.*?#ethers\t\t$ETHERS_FILE?g" $CHILLI_CONF_FILE
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#		$SED "s?^ethers.*?#ethers\t\t$ETHERS_FILE?g" $CHILLI_CONF_FILE
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		$SED "s?^DHCP.*?DHCP=off?g" $ALCASAR_CONF_FILE
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		$SED "s?^DHCP.*?DHCP=off?g" $ALCASAR_CONF_FILE
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		/etc/init.d/chilli restart
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		/etc/init.d/chilli restart
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		;;
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		;;
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	--on|-on) # enable DHCP service
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	--full|-full) # enable DHCP service on all range of IP addresses
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		$SED "s?^statip.*?#statip\t\t$PRIVATE_NETWORK_MASK?g" $CHILLI_CONF_FILE
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		$SED "s?^.*statip.*?#statip?g" $CHILLI_CONF_FILE
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		$SED "s?^nodynip.*?#nodynip?g" $CHILLI_CONF_FILE
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		$SED "s?^nodynip.*?#nodynip?g" $CHILLI_CONF_FILE
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		$SED "s?^#ethers.*?ethers\t\t$ETHERS_FILE?g" $CHILLI_CONF_FILE
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#		$SED "s?^#ethers.*?ethers\t\t$ETHERS_FILE?g" $CHILLI_CONF_FILE
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		$SED "s?^DHCP.*?DHCP=full?g" $ALCASAR_CONF_FILE
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		$SED "s?^dynip.*?dynip\t\t$PRIVATE_NETWORK_MASK?g" $CHILLI_CONF_FILE
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		$SED "s?^#dynip.*?dynip\t\t$PRIVATE_NETWORK_MASK?g" $CHILLI_CONF_FILE
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		$SED "s?^dhcp_range.*?dhcp-range=$PRIVATE_FIRST_IP,$PRIVATE_LAST_IP,$PRIVATE_NETMASK,12h?g" $DNSMASQ_CONF_FILE
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		/etc/init.d/chilli restart
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		;;
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	--half|-half) # enable DHCP service on half (upper) range of IP addresses
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		$SED "s?.*statip.*?statip\t\t$PRIVATE_STAT_IP?g" $CHILLI_CONF_FILE
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		$SED "s?^nodynip.*?#nodynip?g" $CHILLI_CONF_FILE
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#		$SED "s?^#ethers.*?ethers\t\t$ETHERS_FILE?g" $CHILLI_CONF_FILE
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		$SED "s?^DHCP.*?DHCP=on?g" $ALCASAR_CONF_FILE
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		$SED "s?^DHCP.*?DHCP=half?g" $ALCASAR_CONF_FILE
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		$SED "s?^dynip.*?dynip\t\t$PRIVATE_DYN_IP?g" $CHILLI_CONF_FILE
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		$SED "s?^#dynip.*?dynip\t\t$PRIVATE_DYN_IP?g" $CHILLI_CONF_FILE
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		$SED "s?^dhcp_range.*?dhcp-range=$PRIVATE_DYN_FIRST_IP,$PRIVATE_DYN_LAST_IP,$PRIVATE_NETMASK,12h?g" $DNSMASQ_CONF_FILE
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		/etc/init.d/chilli restart
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		/etc/init.d/chilli restart
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		;;
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		;;
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	*)
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	*)
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		echo "Argument inconnu :$1";
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		echo "Argument inconnu :$1";
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		echo "$usage"
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		echo "$usage"