typedef void resolve_answer_fn(void *st, struct in_addr *addr);
typedef bool_t resolve_request_fn(void *st, string_t name,
resolve_answer_fn *cb, void *cst);
typedef void resolve_answer_fn(void *st, struct in_addr *addr);
typedef bool_t resolve_request_fn(void *st, string_t name,
resolve_answer_fn *cb, void *cst);