+extern int pingtimeout;
+extern int maxtimeout;
+extern int bypass_security;
+extern char *confbase;
+extern char *netname;
+
+extern void init_configuration(avl_tree_t **);
+extern void exit_configuration(avl_tree_t **);
+extern config_t *new_config(void);
+extern void free_config(config_t *);
+extern void config_add(avl_tree_t *, config_t *);
+extern config_t *lookup_config(avl_tree_t *, char *);
+extern config_t *lookup_config_next(avl_tree_t *, config_t *);
+extern int get_config_bool(config_t *, int *);
+extern int get_config_int(config_t *, int *);
+extern int get_config_string(config_t *, char **);
+extern int get_config_address(config_t *, struct addrinfo **);
+struct subnet_t; /* Needed for next line. */
+extern int get_config_subnet(config_t *, struct subnet_t **);