Fix SNX interface scope

fixInterfaceScope.sh

fixInterfaceScope() {
  interface=tunsnx
  data=($(ip -o address show "$interface" | awk -F ' +' '{print $4 " " $6 " " $8}'))
  LOCAL_ADDRESS_INDEX=1
  PEER_ADDRESS_INDEX=2
  SCOPE_INDEX=3
  if [ "${data[$SCOPE_INDEX]}" = "global" ]
  then
    echo "Interface ${interface} is already set to global scope. Skip!"
    return
  else
    echo "Interface ${interface} is set to scope ${data[$SCOPE_INDEX]}."
    tmpfile=$(mktemp --suffix=snxwrapper-routes)
    echo "Saving current IP routing table..."
    sudo ip route save dev ${interface} > ${tmpfile}
    echo "Deleting current interface ${interface}..."
    sudo ip address del ${data[$LOCAL_ADDRESS_INDEX]} peer ${data[$PEER_ADDRESS_INDEX]} dev ${interface}
    echo "Recreating interface ${interface} with global scope..."
    sudo ip address add ${data[$LOCAL_ADDRESS_INDEX]} dev ${interface} peer ${data[$PEER_ADDRESS_INDEX]} scope global
    echo "Restoring routing table..."
    sudo ip route restore < $tmpfile 2>/dev/null
    echo "Cleaning temporary files..."
    rm $tmpfile
    echo "Interface ${interface} is set to global scope. Done!"
  fi
}