static void callback(void *arg, int status, unsigned char *abuf, int alen)
void(* ares_host_callback)(void *arg, int status, struct hostent *hostent)
void(* ares_callback)(void *arg, int status, unsigned char *abuf, int alen)
int ares_local_gethostbyaddr(ares_channel channel, const char *addr, int addrlen, int family, ares_host_callback callback, void *arg)
int ares_local_query(ares_channel channel, const char *name, int dnsclass, int type, ares_callback callback, void *arg)
int ares_local_gethostbyname(ares_channel channel, const char *name, int family, ares_host_callback callback, void *arg)
void ares_local_process_requests()