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# -*- coding: binary -*-
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##
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#
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# Net::DNS::RR::NS
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#
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#       $Id: NS.rb,v 1.8 2006/07/28 07:33:36 bluemonk Exp $     
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#
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##
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module Net
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  module DNS
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    class RR
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      #------------------------------------------------------------
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      # RR type NS
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      #------------------------------------------------------------
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      class NS < RR
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        attr_reader :nsdname
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        private
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        def check_name(name)
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          unless name =~ /(\w\.?)+\s*$/ and name =~ /[a-zA-Z]/
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            raise RRArgumentError, "NS Domain Name not valid: #{name}"
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          end
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          name
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        end
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        def build_pack
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          @nsdname_pack = pack_name(@nsdname)
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          @rdlength = @nsdname_pack.size
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        end
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        def set_type
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          @type = Net::DNS::RR::Types.new("NS")
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        end
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        def get_data
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          @nsdname_pack
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        end
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        def get_inspect
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          "#@nsdname"
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        end
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        def subclass_new_from_hash(args)
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          if args.has_key? :nsdname
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            @nsdname = check_name args[:nsdname]
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          else
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            raise RRArgumentError, ":nsdname field is mandatory but missing"
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          end
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        end
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        def subclass_new_from_string(str)
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          @nsdname = check_name(str)
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        end
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        def subclass_new_from_binary(data,offset)
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          @nsdname,offset = dn_expand(data,offset)
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          return offset
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        end
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      end # class NS
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    end # class RR
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  end # module DNS
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end # module Net
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