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# -*- coding: binary -*-
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##
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#
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# Net::DNS::RR::PTR
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#
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#       $Id: PTR.rb,v 1.5 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 PTR
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      #------------------------------------------------------------
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      class PTR < RR
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        # Getter for PTR resource
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        def ptr
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          @ptrdname.to_s
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        end
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        alias_method :ptrdname, :ptr
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        private
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        def check_ptr(str)
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          IPAddr.new str
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        rescue
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          raise RRArgumentError, "PTR section not valid"
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        end
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        def build_pack
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          @ptrdname_pack = pack_name(@ptrdname)
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          @rdlength = @ptrdname_pack.size
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        end
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        def set_type
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          @type = Net::DNS::RR::Types.new("PTR")
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        end
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        def get_data
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          @ptrdname_pack
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        end
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        def get_inspect
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          "#@ptrdname"
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        end
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        def subclass_new_from_hash(args)
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          if args.has_key? :ptrdname or args.has_key? :ptr
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            @ptrdname = args[0][:ptrdname]
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          else
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            raise RRArgumentError, ":ptrdname or :ptr 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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          @ptrdname = check_ptr(str)
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        end
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        def subclass_new_from_binary(data,offset)
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          @ptrdname,offset = dn_expand(data,offset)
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          return offset
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        end
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      end # class PTR
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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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