Add localIP()

TinyGsmClientA6.h

@@ -384,6 +384,8 @@ public:
     return res;
   }
 
+  IPAddress localIP() TINY_GSM_ATTR_NOT_IMPLEMENTED;
+
   /*
    * Phone Call functions
    */

TinyGsmClientESP8266.h

@@ -134,6 +134,13 @@ public:
     return sock_connected;
   }
   virtual operator bool() { return connected(); }
+
+  /*
+   * Extended API
+   */
+
+  String remoteIP() TINY_GSM_ATTR_NOT_IMPLEMENTED;
+
 private:
   TinyGsm*      at;
   uint8_t       mux;
@@ -237,6 +244,10 @@ public:
     return waitResponse(10000L) == 1;
   }
 
+  String getLocalIP() TINY_GSM_ATTR_NOT_IMPLEMENTED;
+
+  IPAddress localIP() TINY_GSM_ATTR_NOT_IMPLEMENTED;
+
 private:
 
   int modemConnect(const char* host, uint16_t port, uint8_t mux) {