-extern void init_configuration(splay_tree_t **);
-extern void exit_configuration(splay_tree_t **);
-extern config_t *new_config(void) __attribute__ ((__malloc__));
-extern void free_config(config_t *);
-extern void config_add(splay_tree_t *, config_t *);
-extern config_t *lookup_config(splay_tree_t *, char *);
-extern config_t *lookup_config_next(splay_tree_t *, const config_t *);
-extern bool get_config_bool(const config_t *, bool *);
-extern bool get_config_int(const config_t *, int *);
-extern bool get_config_string(const config_t *, char **);
-extern bool get_config_address(const config_t *, struct addrinfo **);
-extern bool get_config_subnet(const config_t *, struct subnet_t **);
+extern void init_configuration(splay_tree_t **config_tree);
+extern void exit_configuration(splay_tree_t **config_tree);
+extern config_t *new_config(void) __attribute__((__malloc__));
+extern void free_config(config_t *config);
+extern void config_add(splay_tree_t *config_tree, config_t *config);
+extern config_t *lookup_config(splay_tree_t *config_tree, char *variable);
+extern config_t *lookup_config_next(splay_tree_t *config_tree, const config_t *config);
+extern bool get_config_bool(const config_t *config, bool *result);
+extern bool get_config_int(const config_t *config, int *result);
+extern bool get_config_string(const config_t *config, char **result);
+extern bool get_config_address(const config_t *config, struct addrinfo **result);
+extern bool get_config_subnet(const config_t *config, struct subnet_t **result);