1
# -*- coding: binary -*-
2
##
3
#
4
# Net::DNS::RR::CNAME
5
#
6
#       $Id: CNAME.rb,v 1.7 2006/07/28 07:33:36 bluemonk Exp $  
7
#
8
##
9

10
module Net
11
  module DNS
12

13
    class RR
14
      
15
      #------------------------------------------------------------
16
      # RR type CNAME
17
      #------------------------------------------------------------
18
      class CNAME < RR
19
        attr_reader :cname
20

21
        private
22
        
23
        def check_name(name)
24
          unless name =~ /(\w\.?)+\s*$/ and name =~ /[a-zA-Z]/
25
            raise RRArgumentError, "Canonical Name not valid: #{name}"
26
          end
27
          name
28
        end
29

30
        def build_pack
31
          @cname_pack = pack_name(@cname)
32
          @rdlength = @cname_pack.size
33
        end
34

35
        def set_type
36
          @type = Net::DNS::RR::Types.new("CNAME")
37
        end
38

39
        def get_data
40
          @cname_pack
41
        end
42

43
        def get_inspect
44
          "#@cname"
45
        end
46

47
        def subclass_new_from_hash(args)
48
          if args.has_key? :cname
49
            @cname = check_name args[:cname]
50
          else
51
            raise RRArgumentError, ":cname field is mandatory but missing"
52
          end
53
        end
54

55
        def subclass_new_from_string(str)
56
          @cname = check_name(str)
57
        end
58

59
        def subclass_new_from_binary(data,offset)
60
          @cname,offset = dn_expand(data,offset)
61
          return offset
62
        end
63
        
64
      end # class CNAME
65
       
66
    end # class RR
67
  end # module DNS
68
end # module Net
69

70