Counter hierarchy
=================

Service		unique name
Interface	org.moblin.connman.Counter
Object path	freely definable

Methods		void Release()

			This method gets called when the service daemon
			unregisters the counter. A counter can use it to do
			cleanup tasks. There is no need to unregister the
			counter, because when this method gets called it has
			already been unregistered.

		void Usage(object service, dict)

			This signal indicates a change in the counter values
			for the service object. The counter is reset by calling
			the service ResetCounters method.

			The dict argument contains following entries:

				RX.Packets

					Total number of packets received.

				TX.Bytes

					Total number of packets sent.

				RX.Bytes

					Total number of bytes received.

				TX.Bytes

					Total number of bytes sent.

				RX.Errors

					Total number of erronous packets
					received.

				TX.Errors

					Total number of erronous packets
					sent.

				RX.Dropped

					Total number of dropped packets
					while receiving.

				TX.Dropped

					Total number of dropped packets
					while sending.

				Time

					Total number of seconds online.