extern int subnet_compare(const struct subnet_t *, const struct subnet_t *);
extern subnet_t *new_subnet(void) __attribute__ ((__malloc__));
extern void free_subnet(subnet_t *);
extern void init_subnets(void);
extern void exit_subnets(void);
extern int subnet_compare(const struct subnet_t *, const struct subnet_t *);
extern subnet_t *new_subnet(void) __attribute__ ((__malloc__));
extern void free_subnet(subnet_t *);
extern void init_subnets(void);
extern void exit_subnets(void);
-extern avl_tree_t *new_subnet_tree(void) __attribute__ ((__malloc__));
-extern void free_subnet_tree(avl_tree_t *);
+extern splay_tree_t *new_subnet_tree(void) __attribute__ ((__malloc__));
+extern void free_subnet_tree(splay_tree_t *);
extern void subnet_add(struct node_t *, subnet_t *);
extern void subnet_del(struct node_t *, subnet_t *);
extern void subnet_update(struct node_t *, subnet_t *, bool);
extern void subnet_add(struct node_t *, subnet_t *);
extern void subnet_del(struct node_t *, subnet_t *);
extern void subnet_update(struct node_t *, subnet_t *, bool);
extern subnet_t *lookup_subnet_mac(const struct node_t *, const mac_t *);
extern subnet_t *lookup_subnet_ipv4(const ipv4_t *);
extern subnet_t *lookup_subnet_ipv6(const ipv6_t *);
extern subnet_t *lookup_subnet_mac(const struct node_t *, const mac_t *);
extern subnet_t *lookup_subnet_ipv4(const ipv4_t *);
extern subnet_t *lookup_subnet_ipv6(const ipv6_t *);