Functions¶

void wget_dns_cache_init (void)
void wget_dns_cache_exit (void)
struct addrinfo * wget_dns_cache_get (const char *host, uint16_t port)
struct addrinfo * wget_dns_cache_add (const char *host, uint16_t port, struct addrinfo *addrinfo)
void wget_dns_cache_free (void)

void wget_dns_cache_init (void)¶

Initialize the internal mutex needed for thread-safety operations on the cache entry container (hashmap). If you don't use multi-threading, you don't have to call this function.

The initialization is normally automatically during library construction. But some systems doesn't support library constructors, also static linking doesn't do. That's where this function is needed.

void wget_dns_cache_exit (void)¶

Free the internal mutex allocated by wget_dns_cache_init().

struct addrinfo* wget_dns_cache_get (const char * host, uint16_t port)¶

Parameters

Returns

struct addrinfo* wget_dns_cache_add (const char * host, uint16_t port, struct addrinfo * addrinfo)¶

Parameters

Returns

void wget_dns_cache_free (void)¶

Free the DNS cache.

The DNS cache is kept internally in memory. This function releases all its entries and then removes the cache itself, thus freeing memory.

The cache will be re-generated again when calling wget_tcp_resolve(), if the tcp->caching flag was set.