eval from_$name=$(( $netclassindex << $BIT_FROM ))
eval to_$name=$(( $netclassindex << $BIT_TO ))
eval _mask_$name=$(( 1 << ($netclassindex + $BIT_MASK) ))
eval from_$name=$(( $netclassindex << $BIT_FROM ))
eval to_$name=$(( $netclassindex << $BIT_TO ))
eval _mask_$name=$(( 1 << ($netclassindex + $BIT_MASK) ))