Dnsruby::Header

     # File lib/Dnsruby/message.rb, line 778
778:     def Header.decrement_arcount_encoded(bytes)
779:       header = Header.new
780:       header_end = 0
781:       MessageDecoder.new(bytes) {|msg|
782:         header.decode(msg)
783:         header_end = msg.index
784:       }
785:       header.arcount = header.arcount - 1
786:       bytes[0,header_end]=MessageEncoder.new {|msg|
787:         header.encode(msg)}.to_s
788:       return bytes
789:     end

     # File lib/Dnsruby/message.rb, line 718
718:     def initialize(*args)
719:       if (args.length == 0)
720:         @id = rand(MAX_ID)
721:         @qr = false
722:         @opcode=OpCode.Query
723:         @aa = false
724:         @ad=false
725:         @tc = false
726:         @rd = false # recursion desired
727:         @ra = false # recursion available
728:         @cd=false
729:         @rcode=RCode.NoError
730:         @qdcount = 0
731:         @nscount = 0
732:         @ancount = 0
733:         @arcount = 0
734:       elsif (args.length == 1)
735:         decode(args[0])
736:       end
737:     end

     # File lib/Dnsruby/message.rb, line 747
747:     def Header.new_from_data(data)
748:       header = Header.new
749:       MessageDecoder.new(data) {|msg|
750:         header.decode(msg)}
751:       return header
752:     end

     # File lib/Dnsruby/message.rb, line 791
791:     def ==(other)
792:       return @qr == other.qr &&
793:         @opcode == other.opcode &&
794:         @aa == other.aa &&
795:         @tc == other.tc &&
796:         @rd == other.rd &&
797:         @ra == other.ra &&
798:         @cd == other.cd &&
799:         @ad == other.ad &&
800:         @rcode == other.get_header_rcode
801:     end

     # File lib/Dnsruby/message.rb, line 754
754:     def data
755:       return MessageEncoder.new {|msg|
756:         self.encode(msg)
757:       }.to_s
758:     end

     # File lib/Dnsruby/message.rb, line 840
840:     def decode(msg)
841:       @id, flag, @qdcount, @ancount, @nscount, @arcount =
842:         msg.get_unpack('nnnnnn')
843:       @qr = (((flag >> 15)&1)==1)?true:false
844:       @opcode = OpCode.new((flag >> 11) & 15)
845:       @aa = (((flag >> 10)&1)==1)?true:false
846:       @tc = (((flag >> 9)&1)==1)?true:false
847:       @rd = (((flag >> 8)&1)==1)?true:false
848:       @ra = (((flag >> 7)&1)==1)?true:false
849:       @ad = (((flag >> 5)&1)==1)?true:false
850:       @cd = (((flag >> 4)&1)==1)?true:false
851:       @rcode = RCode.new(flag & 15)
852:     end

     # File lib/Dnsruby/message.rb, line 760
760:     def encode(msg)
761:       msg.put_pack('nnnnnn',
762:         @id,
763:         (@qr ? 1:0) << 15 |
764:         (@opcode.code & 15) << 11 |
765:         (@aa ? 1:0) << 10 |
766:         (@tc ? 1:0) << 9 |
767:         (@rd ? 1:0) << 8 |
768:         (@ra ? 1:0) << 7 |
769:         (@ad ? 1:0) << 5 |
770:         (@cd ? 1:0) << 4 |
771:         (@rcode.code & 15),
772:         @qdcount,
773:         @ancount,
774:         @nscount,
775:         @arcount)
776:     end

     # File lib/Dnsruby/message.rb, line 702
702:     def get_header_rcode
703:       @rcode
704:     end

     # File lib/Dnsruby/message.rb, line 739
739:     def opcode=(op)
740:       @opcode = OpCode.new(op)
741:     end

     # File lib/Dnsruby/message.rb, line 743
743:     def rcode=(rcode)
744:       @rcode = RCode.new(rcode)
745:     end

     # File lib/Dnsruby/message.rb, line 803
803:     def to_s
804:       to_s_with_rcode(@rcode)
805:     end

     # File lib/Dnsruby/message.rb, line 807
807:     def to_s_with_rcode(rcode)
808:       retval = ";; id = #{@id}\n";
809:       
810:       if (@opcode == OpCode::Update)
811:         retval += ";; qr = #{@qr}    " +           "opcode = #{@opcode.string}    "+           "rcode = #{@rcode.string}\n";
812:         
813:         retval += ";; zocount = #{@qdcount}  "+           "prcount = #{@ancount}  " +           "upcount = #{@nscount}  "  +           "adcount = #{@arcount}\n";
814:       else
815:         retval += ";; qr = #{@qr}    "  +           "opcode = #{@opcode.string}    " +           "aa = #{@aa}    "  +           "tc = #{@tc}    " +           "rd = #{@rd}\n";
816:         
817:         retval += ";; ra = #{@ra}    " +           "ad = #{@ad}    "  +           "cd = #{@cd}    "  +           "rcode  = #{rcode.string}\n";
818:         
819:         retval += ";; qdcount = #{@qdcount}  " +           "ancount = #{@ancount}  " +           "nscount = #{@nscount}  " +           "arcount = #{@arcount}\n";
820:       end
821:       
822:       return retval;
823:     end