ip-address-addon.rb

require 'ip'

IP::Address::IPv4.class_eval do

  # returns next IP address
  def next(step=1)
    IP::Address::Util.unpack(self.pack + step)
  end

  # returns previous IP address
  def prev(step=1)
    IP::Address::Util.unpack(self.pack - step)
  end

  def to_s
    ip_address
  end

end