walktree_f_t
walktree_f_t *f;
walktree_f_t *f;
static int rn_walktree(struct radix_node_head *, walktree_f_t *, void *);
static int rn_walktree_mt(struct radix_node_head *, walktree_f_t *,
(struct radix_node_head *head, walktree_f_t *f, void *w);
(struct radix_node_head *head, walktree_f_t *f, void *w,
walktree_f_t *f, void *w);