-extern int send_meta(conn_list_t *, const char *, int)
-extern int broadcast_meta(conn_list_t *, const char *, int)
-extern int receive_meta(conn_list_t *)
+extern bool send_meta(struct connection_t *, const char *, int);
+extern bool broadcast_meta(struct connection_t *, const char *, int);
+extern bool receive_meta(struct connection_t *);