class Gem::Resolv::DNS::Config

def generate_candidates(name)
  candidates = nil
  name = Name.create(name)
  if name.absolute?
    candidates = [name]
  else
    if @ndots <= name.length - 1
      candidates = [Name.new(name.to_a)]
    else
      candidates = []
    end
    candidates.concat(@search.map {|domain| Name.new(name.to_a + domain)})
    fname = Name.create("#{name}.")
    if !candidates.include?(fname)
      candidates << fname
    end
  end
  return candidates
end