sender

# File lib/resolv.rb, line 844
        def sender(msg, data, host, port=Port)
          id = DNS.allocate_request_id(host, port)
          request = msg.encode
          request[0,2] = [id].pack('n')
          sock = @socks_hash[host.index(':') ? "::" : "0.0.0.0"]
          return @senders[id] =
            UnconnectedUDP::Sender.new(request, data, sock, host, port)
        end