+static uint8_t read_worldstate();
+
+/* If "last_server_answer_time" is too old, send a PING to the server; or, if a
+ * previous PING has not sparked any answer after a while, abort the client.
+ */
+static void ping_pong_test(time_t last_server_answer_time);
+
+/* Read server's out file into queue, update "last_server_answer_time" if new
+ * stuff is found there.
+ */
+static void try_growing_queue(time_t * last_server_answer_time);
+
+/* Read server out file for messages, act on them (i.e. derive log messages). */
+static uint8_t read_outfile();