#--
#Copyright 2007 Nominet UK
#
#Licensed under the Apache License, Version 2.0 (the "License");
#you may not use this file except in compliance with the License. 
#You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0 
#
#Unless required by applicable law or agreed to in writing, software 
#distributed under the License is distributed on an "AS IS" BASIS, 
#WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
#See the License for the specific language governing permissions and 
#limitations under the License.
#++
module Dnsruby
  class RR
    module IN
      #Class for DNS AFS Data Base (AFSDB) resource records.
      #
      #RFC 1183 Section 1
      class AFSDB < RR
        ClassHash[[TypeValue = Types::AFSDB, ClassValue = ClassValue]] = self #:nodoc: all
        
        #The RR's subtype field.  See RFC 1183.
        attr_accessor :subtype
        
        #The RR's hostname field.  See RFC 1183.
        attr_accessor :hostname
        
        def from_hash(hash) #:nodoc: all
          @subtype = hash[:subtype]
          @hostname = Name.create(hash[:hostname])
        end
        
        def from_data(data) #:nodoc: all
          @subtype, @hostname = data
        end
        
        def from_string(input) #:nodoc: all
          if (input!=nil && (input =~ /^(\d+)\s+(\S+)$/o))
            @subtype  = $1;
            @hostname = Name.create($2)
          end
        end
        
        def rdata_to_string #:nodoc: all
          if defined?@subtype
            return "#{@subtype} #{@hostname.to_s(true)}"
          else
            return '';
          end
        end
        
        def encode_rdata(msg, canonical=false) #:nodoc: all
          msg.put_pack("n", @subtype.to_i)
          msg.put_name(@hostname, canonical)
        end
        
        def self.decode_rdata(msg) #:nodoc: all
          subtype,     = msg.get_unpack("n")
          hostname    = msg.get_name
          return self.new([subtype, hostname])
        end
      end
    end   
  end
end
