wakeonlanservice.sh

#!/bin/bash

# Copyright (C) 2018  Tetras Libre <Contact@Tetras-Libre.fr>
# Author: Beniamine, David <David.Beniamine@Tetras-Libre.fr>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# 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 IP}}' \
        < /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)
while true
do
    MAC=`netcat -k -l $IP 9999`
    if [ $(echo "$MAC" | egrep -c "^([0-9a-f]{2}:?){6}$") -eq 1 ]
    then
        wakeonlan -i $broadcast "$MAC"
        bootedip=""
        sleep 25
        while [ -z "$bootedip" ]
        do
            bootedip=`getip $MAC`
            sleep 5
        done
        echo "$bootedip" | netcat $subnet.51 9999
    fi
done