+ /**
+ * This set of methods enhance LinphoneCore functionalities in order to provide an easy to use API to
+ * - provision tunnel servers ip addresses and ports. This functionality is an option not implemented under GPL.
+ * - start/stop the tunneling service
+ * - perform auto-detection whether tunneling is required, based on a test of sending/receiving a flow of UDP packets.
+ *
+ * It takes in charge automatically the SIP registration procedure when connecting or disconnecting to a tunnel server.
+ * No other action on LinphoneCore is required to enable full operation in tunnel mode.
+ **/
+