Class: ReDNS::Resource

Inherits:
Fragment show all
Defined in:
lib/redns/resource.rb

Instance Attribute Summary

Attributes inherited from Fragment

#attributes

Instance Method Summary collapse

Methods inherited from Fragment

attribute, #initialize

Methods included from Support

#addr_to_arpa, #bind_all_addr, #default_nameservers, #default_resolver_address, #dns_port, #inet_aton, #inet_ntoa, #io_nonblock, #io_nonblock?, #io_set_nonblock, #is_ip?

Constructor Details

This class inherits a constructor from ReDNS::Fragment

Instance Method Details

#deserialize(buffer) ⇒ Object 



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# File 'lib/redns/resource.rb', line 56

def deserialize(buffer)
self.name = ReDNS::Name.new(buffer)

raw = buffer.unpack("nnNn")

self.rtype = ReDNS::RR_TYPE_LABEL[raw.shift]
self.rclass = ReDNS::RR_CLASS_LABEL[raw.shift]
self.ttl = raw.shift

rdata_length = raw.shift

  self.rdata =
		case (self.rtype)
		when :a, :aaaa
			self.rdata = ReDNS::Address.new(buffer)
		when :cname, :ptr, :ns
			self.rdata = ReDNS::Name.new(buffer)
		when :soa
			self.rdata = ReDNS::Record::SOA.new(buffer)
		when :txt, :null
			self.rdata = ReDNS::Record::Null.new(buffer.read(rdata_length))
		when :mx
			self.rdata = ReDNS::Record::MX.new(buffer)
		else
      # FUTURE: Throw exception here when trying to decode invalid type
		  nil
		end
		
	self
end

#empty? ⇒ Boolean

Instance Methods =====================================================

Returns:

  • (Boolean) 


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# File 'lib/redns/resource.rb', line 17

def empty?
  self.name.empty?
end

#serialize(buffer = ReDNS::Buffer.new) ⇒ Object 



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# File 'lib/redns/resource.rb', line 29

def serialize(buffer = ReDNS::Buffer.new)
  self.name.serialize(buffer)
  
  data_buffer = nil
  
  if (self.rdata)
 	  data_buffer = ReDNS::Buffer.new
 	  self.rdata.serialize(data_buffer)
  end
  
  buffer.pack(
    [
 			ReDNS::RR_TYPE[self.rtype],
 			ReDNS::RR_CLASS[self.rclass],
 			self.ttl,
 			data_buffer ? data_buffer.length : 0
    ],
    'nnNn'
  )
  
  if (data_buffer)
    buffer.append(data_buffer)
   end
   
   buffer
end

#to_a ⇒ Object 



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# File 'lib/redns/resource.rb', line 25

def to_a
	[ name, ttl, rclass, rtype, rdata.to_a ].flatten
end

#to_s ⇒ Object 



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# File 'lib/redns/resource.rb', line 21

def to_s
	"#{name} #{ttl} #{rclass.to_s.upcase} #{rtype.to_s.upcase} #{rdata}"
end