-extern void free_connection(connection_t *);
-extern void free_connection_partially(connection_t *);
-extern void connection_add(connection_t *);
-extern void connection_del(connection_t *);
+extern void free_connection(connection_t *c);
+extern void free_connection_partially(connection_t *c);
+extern void connection_add(connection_t *c);
+extern void connection_del(connection_t *c);