Get ip from dhcp lease

wol/scripts/wakeonlanservice.sh

@@ -16,6 +16,11 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
+getip(){
+    awk '/^lease/{IP=$2} /hardware ethernet/{gsub(";","",$3);if($3 == "'$1'"){print $3}}' \
+        < /var/lib/dhcp/dhcpd.leases
+}
+
 IP=$(ip a | awk '/inet.*containers/ {print $2}' | cut -d / -f 1)
 broadcast=$(ip a | awk '/inet.*eth1/ {print $4}' | cut -d / -f 1)
 subnet=$(ip a | awk '/inet.*containers/ {print $2}' | cut -d / -f 1 | cut -d . -f 1-3)
@@ -25,7 +30,7 @@ netcat -k -l $IP 9999 | \
         if [ $(echo "$MAC" | egrep -c "^([0-9a-f]{2}:?){6}$") -eq 1 ]
         then
             wakeonlan -i $broadcast "$MAC"
-            bootedip=`arp | grep "$MAC" | awk '{print $1}'`
+            bootedip=`getip $MAC`
             echo "$bootedip" | netcat $subnet.51 9999
         fi
     done