Merge pull request #2 from ilmanzo/ch_class

support for CH class

examples/chaos_class_resolve.cr

@@ -0,0 +1,20 @@
+#query local bind server version using CH class, TXT record
+
+require "../src/durian.cr"
+
+buffer = uninitialized UInt8[4096_i32]
+
+request = Durian::Packet::Request.new
+
+request.queries << Durian::Section::Question.new Durian::RecordFlag::TXT, "version.bind", Durian::Cls::CH
+
+_request = IO::Memory.new request.to_slice
+puts [:Request, Durian::Packet::Request.from_io _request]
+
+udp_socket = UDPSocket.new
+udp_socket.connect Socket::IPAddress.new "127.0.0.1", 53_i32
+udp_socket.send _request.to_slice
+length, ip_address = udp_socket.receive buffer.to_slice
+
+_response = IO::Memory.new buffer.to_slice[0_i32, length]
+puts [:Response, Durian::Packet::Response.from_io _response]

src/durian/durian.cr

@@ -96,6 +96,8 @@ module Durian
 
   enum Cls : UInt16
     IN = 1_u16
+    CH = 3_u16  # rfc 2929
+    HS = 4_u16
   end
 
   class MalformedPacket < Exception