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#!/bin/bash
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#!/bin/bash
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# $Id: alcasar-dhcp.sh 2688 2019-01-18 23:15:49Z lucas.echard $
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# $Id: alcasar-dhcp.sh 2708 2019-03-05 23:17:43Z tom.houdayer $
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# alcasar-dhcp.sh
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# alcasar-dhcp.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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ALCASAR_CONF_FILE="/usr/local/etc/alcasar.conf"
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ALCASAR_CONF_FILE="/usr/local/etc/alcasar.conf"
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# define DHCP parameters (LAN side)
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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_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_PREFIX=`/bin/ipcalc -p $PRIVATE_IP $PRIVATE_NETMASK |cut -d"=" -f2`
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PRIVATE_NETWORK_MASK=$PRIVATE_NETWORK/$PRIVATE_PREFIX                                   # ie.: 192.168.182.0/24
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PRIVATE_NETWORK_MASK="$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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EXT_DHCP_IP=`grep ^EXT_DHCP_IP= $ALCASAR_CONF_FILE|cut -d"=" -f2`                               # Adresse du serveur DHCP externe
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EXT_DHCP_IP=`grep ^EXT_DHCP_IP= $ALCASAR_CONF_FILE|cut -d"=" -f2`                                       # Adresse du serveur DHCP externe
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RELAY_DHCP_IP=`grep ^RELAY_DHCP_IP= $ALCASAR_CONF_FILE|cut -d"=" -f2`                   # Adresse de l'agent Relay : IP interne (défaut 192.168.182.1) dans le cas de DHCP dans le LAN de consultation
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RELAY_DHCP_IP=`grep ^RELAY_DHCP_IP= $ALCASAR_CONF_FILE|cut -d"=" -f2`                                   # Adresse de l'agent Relay : IP interne (défaut 192.168.182.1) dans le cas de DHCP dans le LAN de consultation
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RELAY_DHCP_IP=${RELAY_DHCP_IP:=$PRIVATE_IP}                                             # IP externe (défaut x.y.z.t) dans le cas de DHCP du côté WAN
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RELAY_DHCP_IP=${RELAY_DHCP_IP:=$PRIVATE_IP}                                                             # IP externe (défaut x.y.z.t) dans le cas de DHCP du côté WAN
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RELAY_DHCP_PORT=`grep ^RELAY_DHCP_PORT= $ALCASAR_CONF_FILE|cut -d"=" -f2`                       # Port de redirection vers le relay DHCP :  67 par défaut
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RELAY_DHCP_PORT=`grep ^RELAY_DHCP_PORT= $ALCASAR_CONF_FILE|cut -d"=" -f2`                               # Port de redirection vers le relay DHCP :  67 par défaut
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RELAY_DHCP_PORT=${RELAY_DHCP_PORT:=67}
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RELAY_DHCP_PORT=${RELAY_DHCP_PORT:=67}
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        -\? | -h | --h)
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        -\? | -h | --h)
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                echo "$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?^DHCP=.*?DHCP=off?g" $ALCASAR_CONF_FILE
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                $SED "s?.*statip.*?statip\t\t$PRIVATE_NETWORK_MASK?g" $CHILLI_CONF_FILE
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                $SED "s?.*statip.*?statip\t\t$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@^#\?dynip.*@#dynip@g" $CHILLI_CONF_FILE
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                $SED "s?^DHCP.*?DHCP=off?g" $ALCASAR_CONF_FILE
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                if [ "$EXT_DHCP_IP" != "none" ]
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                if [ -n "$EXT_DHCP_IP" ] && [ "$EXT_DHCP_IP" != "none" ]
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                then
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                then
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                        $SED "s?.*dhcpgateway\t.*?dhcpgateway\t\t $EXT_DHCP_IP?g" $CHILLI_CONF_FILE
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                        $SED "s?.*dhcpgateway\s.*?dhcpgateway\t$EXT_DHCP_IP?g" $CHILLI_CONF_FILE
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                        $SED "s?.*dhcprelayagent.*?dhcprelayagent\t\t$RELAY_DHCP_IP?g" $CHILLI_CONF_FILE
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                        $SED "s?.*dhcprelayagent.*?dhcprelayagent\t$RELAY_DHCP_IP?g" $CHILLI_CONF_FILE
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                        $SED "s?.*dhcpgatewayport.*?dhcpgatewayport\t\t$RELAY_DHCP_PORT?g" $CHILLI_CONF_FILE
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                        $SED "s?.*dhcpgatewayport.*?dhcpgatewayport\t$RELAY_DHCP_PORT?g" $CHILLI_CONF_FILE
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                else
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                else
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                        $SED "s?.*dhcpgateway\t.*?#dhcpgateway\t\t$EXT_DHCP_IP?g" $CHILLI_CONF_FILE
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                        $SED "s?.*dhcpgateway\s.*?#dhcpgateway\t\t$EXT_DHCP_IP?g" $CHILLI_CONF_FILE
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                        $SED "s?.*dhcprelayagent.*?#dhcprelayagent\t\t$RELAY_DHCP_IP?g" $CHILLI_CONF_FILE
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                        $SED "s?.*dhcprelayagent.*?#dhcprelayagent\t\t$RELAY_DHCP_IP?g" $CHILLI_CONF_FILE
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                        $SED "s?.*dhcpgatewayport.*?#dhcpgatewayport\t\t$RELAY_DHCP_PORT?g" $CHILLI_CONF_FILE
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                        $SED "s?.*dhcpgatewayport.*?#dhcpgatewayport\t\t$RELAY_DHCP_PORT?g" $CHILLI_CONF_FILE
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                fi
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                fi
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                /usr/bin/systemctl restart chilli
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                /usr/bin/systemctl restart chilli
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                ;;
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                ;;
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        --on|-on) # enable DHCP service on all range of IP addresses
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        --on|-on) # enable DHCP service on all range of IP addresses
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                $SED "s?^DHCP=.*?DHCP=on?g" $ALCASAR_CONF_FILE
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                $SED "s?^RELAY_DHCP_IP=.*?RELAY_DHCP_IP=$RELAY_DHCP_IP?g" $ALCASAR_CONF_FILE
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                $SED "s?^RELAY_DHCP_PORT=.*?RELAY_DHCP_PORT=$RELAY_DHCP_PORT?g" $ALCASAR_CONF_FILE
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                $SED "s?^.*statip.*?#statip?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?^DHCP.*?DHCP=on?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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                $SED "s@^#\?dynip.*@dynip\t\t$PRIVATE_NETWORK_MASK@g" $CHILLI_CONF_FILE
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                $SED "s?^dhcpgateway\t.*?#dhcpgateway\t\t $EXT_DHCP_IP?g" $CHILLI_CONF_FILE
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                $SED "s?^dhcpgateway\s.*?#dhcpgateway\t$EXT_DHCP_IP?g" $CHILLI_CONF_FILE
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                $SED "s?^dhcprelayagent.*?#dhcprelayagent\t\t$RELAY_DHCP_IP?g" $CHILLI_CONF_FILE
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                $SED "s?^dhcprelayagent.*?#dhcprelayagent\t$RELAY_DHCP_IP?g" $CHILLI_CONF_FILE
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                $SED "s?^dhcpgatewayport.*?#dhcpgatewayport\t\t$RELAY_DHCP_PORT?g" $CHILLI_CONF_FILE
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                $SED "s?^dhcpgatewayport.*?#dhcpgatewayport\t$RELAY_DHCP_PORT?g" $CHILLI_CONF_FILE
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                $SED "s?^EXT_DHCP_IP.*?EXT_DHCP_IP=$EXT_DHCP_IP?g" $ALCASAR_CONF_FILE
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                $SED "s?^RELAY_DHCP_IP.*?RELAY_DHCP_IP=$RELAY_DHCP_IP?g" $ALCASAR_CONF_FILE
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                $SED "s?^RELAY_DHCP_PORT.*?RELAY_DHCP_PORT=$RELAY_DHCP_PORT?g" $ALCASAR_CONF_FILE
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                /usr/bin/systemctl restart chilli
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                /usr/bin/systemctl restart chilli
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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"