#!/bin/sh
#===============================================================================================================================================
#
# Programm        : DynIP Checker
# Datei           : CheckDynIP.sh
# Version         : 1.0
# Beschreibung    : Dynamische IP Adresse prüfen
#
#------------------------------------------------------------------------
#
# Autor           : Michael Kleger, OneSystems
# Datum           : 20.09.2019 -->     Erstelldatum
#
#===============================================================================================================================================

if [ ! -f ~/.DynIP ]; then
    touch ~/.DynIP
fi


#-----------------------------------------------------------------------------------------------------------------------------------------------
# Konfiguration
#-----------------------------------------------------------------------------------------------------------------------------------------------
LocIP=`cat ~/.DynIP`
DynIP=$(curl -s tools.mail.town)
FromMail="support@mail.town"
AdminMail="ich@mail.town"


#-----------------------------------------------------------------------------------------------------------------------------------------------
# Script
#-----------------------------------------------------------------------------------------------------------------------------------------------
if [ "$LocIP" != "${DynIP}" ]; then

# Mail versenden
if [ -a /usr/sbin/sendmail ]; then
/usr/sbin/sendmail "$AdminMail" <<EOF
subject:[Achtung] $(hostname -f) hat neue öffentliche IP Adresse
from:$FromMail
Server angaben
---------------------------
   Datum:         $(date)
   Hostname:      $(hostname -f)
   Neue Adresse:  $DynIP
   Alte Adresse:  $LocIP

---------------------------
Mail Town E-Mail Service

EOF
fi

# Neue IP abspeichern
echo $DynIP > ~/.DynIP    
fi