-static char *null_init(char *, int, char **);
-static int null_msg(void);
-static void null_send(char *, int);
-static void loop_send(char *, int);
-static void hexdump_send(char *, int);
-static void null_size(void);
-static void null_special(Telnet_Special);
+static char *null_init(Session *);
+static int null_msg(Session *, SOCKET, Net_Event_Type);
+static void null_send(Session *, char *, int);
+static void loop_send(Session *, char *, int);
+static void hexdump_send(Session *, char *, int);
+static void null_size(Session *);
+static void null_special(Session *, Telnet_Special);