# File lib/net/dns/rr.rb, line 183
      def comp_data(offset,compnames)
        type,cls = @type.to_i, @cls.to_i
        str,offset,names = dn_comp(@name,offset,compnames)
        str += [type,cls,@ttl,@rdlength].pack("n2 N n")
        offset += Net::DNS::RRFIXEDSZ
        return str,offset,names
      end