Relaunch script 'check_forwarding.sh'.

check_forwarding.sh

@@ -2,16 +2,179 @@
 
 declare -i val=`cat /proc/sys/net/ipv4/ip_forward`
 
+LOCK_DIR="$(mktemp -d)"
+
+#---------------------------------------
+#-----------------------------
+# Base Function(s)
+#-----------------------------
+#---------------------------------------
+
+fatal(){
+   echo ""
+   if $terminal ; then
+      echo -e "   [ \033[31m\033[1mFatal\033[m ] $*"
+   else
+      echo -e "   [ Fatal ] $*"
+   fi
+   echo ""
+   if $terminal ; then
+      echo -e "             \033[1mScript terminated\033[m.."
+   else
+      echo -e "             Script terminated.."
+   fi
+   echo ""
+   rm -rf $LOCK_DIR
+   exit 1
+}
+
+error (){
+   echo ""
+   if $terminal ; then
+      echo -e "   [ \033[31m\033[1mError\033[m ] $*"
+   else
+      echo "   [ Error ] $*"
+   fi
+   echo ""
+}
+
+warn (){
+   echo ""
+   if $terminal ; then
+      echo -e "   [ \033[33m\033[1mWarn\033[m ]  $*"
+   else
+      echo "   [ Warn ]  $*"
+   fi
+   echo ""
+}
+
+info (){
+   echo ""
+   if $terminal ; then
+      echo -e "   [ \033[32m\033[1mInfo\033[m ]  $*"
+   else
+      echo "   [ Info ]  $*"
+   fi
+   echo ""
+}
+
+ok (){
+   echo ""
+   if $terminal ; then
+      echo -e "   [ \033[32m\033[1mOk\033[m ]    $*"
+   else
+      echo "   [ Ok ]    $*"
+   fi
+   echo ""
+}
+
+trim() {
+    local var="$*"
+    var="${var#"${var%%[![:space:]]*}"}"   # remove leading whitespace characters
+    var="${var%"${var##*[![:space:]]}"}"   # remove trailing whitespace characters
+    echo -n "$var"
+}
+
+#-----------------------------
+# Check some prerequisites
+#-----------------------------
+#---------------------------------------
+
+# - Running in a terminal?
+# -
+if [[ -t 1 ]] ; then
+   terminal=true
+   LOGGING=true
+else
+   terminal=false
+   LOGGING=false
+fi
+
+
+if $LOGGING ; then
+   echo -e "\n   Check if Forwarding ist activated.."
+   echo -e "   ==================================="
+fi
+
+if [[ $(cat /proc/sys/net/ipv4/ip_forward) -eq 1 ]]; then
+   if $LOGGING ; then
+      ok "Forwarding is activated."
+   fi
+else
+   error "Forwarding seems NOT to be activated. Try to activate forwarding nos.."
 
-if [ $val == 0 ] ; then
-   echo "activate forwarding .."
    echo 1 > /proc/sys/net/ipv4/ip_forward
+
+
+   if [[ $(cat /proc/sys/net/ipv4/ip_forward) -eq 1 ]]; then
+      ok "Forwarding is now activated."
+   else
+      error "Activating Forwarding failed!"
+      exit 1
+   fi
 fi
 
-val=`cat /proc/sys/net/ipv4/ip_dynaddr`
-if [ $val == 0 ] ; then
-   echo "activate dynaddr .."
-   echo 5 > /proc/sys/net/ipv4/ip_dynaddr
+VAL=$(cat /proc/sys/net/ipv4/ip_dynaddr)
+if [[ "$VAL" -eq 0 ]]; then
+   error  "ip_dynaddr: DEAKTIVIERT ($VAL). Try to set value to '3'.."
+
+   echo 3 > /proc/sys/net/ipv4/ip_dynaddr
+
+   VAL=$(cat /proc/sys/net/ipv4/ip_dynaddr)
+
+   if [[ "$VAL" -eq 3 ]]; then
+
+      ok "ip_dynaddr: AKTIV + Verbose Logging ($VAL)"
+
+   else
+
+      error "Seting '/proc/sys/net/ipv4/ip_dynaddr' to '3' failed!"
+      exit 1
+   fi
+
+elif [[ "$VAL" -eq 1 ]]; then
+
+   if $LOGGING ; then
+
+      ok "ip_dynaddr: AKTIV ($VAL)."
+
+   fi
+
+elif [[ "$VAL" -eq 2 ]]; then
+
+   if $LOGGING ; then
+
+      ok "ip_dynaddr: AKTIV + Verbose Logging ($VAL)"
+
+   fi
+
+elif [[ "$VAL" -eq 3 ]]; then
+
+   if $LOGGING ; then
+
+      ok "ip_dynaddr: AKTIV + Verbose Logging ($VAL)"
+
+   fi
+
+else
+   error "ip_dynaddr: UNBEKANNTER WERT ($VAL). Try to set value to '3'.."
+
+   echo 3 > /proc/sys/net/ipv4/ip_dynaddr
+
+   VAL=$(cat /proc/sys/net/ipv4/ip_dynaddr)
+
+   if [[ "$VAL" -eq 3 ]]; then
+
+      ok "ip_dynaddr: AKTIV + Verbose Logging ($VAL)"
+
+   else
+
+      error "Seting '/proc/sys/net/ipv4/ip_dynaddr' to '3' failed!"
+      exit 1
+   fi
+
 fi
 
-exit
+
+rm -rf $LOCK_DIR
+exit 0