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# -*- coding: binary -*-
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##
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#
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# Net::DNS::RR::HINFO
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#
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# $Id: HINFO.rb,v 1.4 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 HINFO
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      #------------------------------------------------------------
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      class HINFO < RR
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        attr_reader :cpu, :os
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        private
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        def check_hinfo(str)
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          if str.strip =~ /^["'](.*?)["']\s+["'](.*?)["']$/
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            return $1,$2
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          else
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            raise RRArgumentError, "HINFO section not valid: #{str.inspect}"
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          end
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        end
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        def build_pack
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          @hinfo_pack = [@cpu.size].pack("C") + @cpu
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          @hinfo_pack += [@os.size].pack("C") + @os
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          @rdlength = @hinfo_pack.size
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        end
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        def set_type
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          @type = Net::DNS::RR::Types.new("HINFO")
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        end
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        def get_data
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          @hinfo_pack
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        end
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        def get_inspect
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          "#@cpu #@os"
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        end
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        def subclass_new_from_hash(args)
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          if args.has_key? :cpu and args.has_key? :os
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            @cpu = args[:cpu]
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            @os =  args[:os]
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          else
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            raise RRArgumentError, ":cpu and :os fields are 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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          @cpu,@os = check_hinfo(str)
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        end
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        def subclass_new_from_binary(data,offset)
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          len = data.unpack("@#{offset} C")[0]
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          @cpu = data[offset+1..offset+1+len]
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          offset += len+1
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          len = data.unpack("@#{offset} C")[0]
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          @os = data[offset+1..offset+1+len]
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          return offset += len+1
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        end
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      end # class HINFO
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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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