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elinks/src/network/dns.h
Witold Filipczyk 0fea79cc8f [cflags] Removed -Wno-pointer-sign
Likely some new bugs were introduced by this change.
The long term goal is clean compilation by g++.
2021-01-02 16:20:27 +01:00

51 lines
1.6 KiB
C

#ifndef EL__NETWORK_DNS_H
#define EL__NETWORK_DNS_H
#include <sys/types.h>
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif
enum dns_result {
DNS_ERROR = -1, /* DNS lookup failed. */
DNS_SUCCESS = 0, /* DNS lookup was successful. */
DNS_ASYNC = 1, /* An async lookup was started. */
};
typedef void (*dns_callback_T)(void *, struct sockaddr_storage *, int);
/* Look up the specified @host using synchronious querying. An array of found
* addresses will be allocated in @addr with the array length stored in
* @addrlen. The boolean @called_from_thread is a hack used internally to get
* the correct allocation method. */
/* Returns non-zero on error and zero on success. */
enum dns_result
do_real_lookup(char *host, struct sockaddr_storage **addr, int *addrlen,
int called_from_thread);
/* Look up the specified @host storing private query information in struct
* pointed to by @queryref. When the query is done the @done callback will be
* called with @data, an array of found addresses (or NULL on error) and the
* address array length. If the boolean @no_cache is non-zero cached DNS queries
* are ignored. */
/* Returns whether the query is asynchronious. */
enum dns_result find_host(char *name, void **queryref,
dns_callback_T done, void *data, int no_cache);
/* Stop the DNS request pointed to by the @queryref reference. */
void kill_dns_request(void **queryref);
/* Manage the cache of DNS lookups. If the boolean @whole is non-zero all DNS
* cache entries will be removed. */
void shrink_dns_cache(int whole);
#ifdef __cplusplus
}
#endif
#endif