ObjFW  Check-in [60cb25ab50]

 * @brief A struct which represents a host / port pair for a UDP socket.
 */
typedef struct {
	struct sockaddr_storage address;
	socklen_t length;
} of_udp_socket_address_t;

#ifdef OF_HAVE_BLOCKS
/*!
 * @brief A block which is called when the host / port pair for the UDP socket
 *	  has been resolved.
 *
 * @param host The host that has been resolved
 * @param port The port of the host / port pair
 * @param address The address of the resolved host / port pair

 * @param exception An exception which occurred while receiving or nil on
 *		    success
 * @return A bool whether the same block should be used for the next receive
 */
typedef bool (^of_udp_socket_async_receive_block_t)(OFUDPSocket *socket,
    void *buffer, size_t length, of_udp_socket_address_t sender,
    OFException *exception);
#endif

/*!
 * @brief A class which provides functions to create and use UDP sockets.
 *
 * Addresses are of type @ref of_udp_socket_address_t. You can use @ref
 * getHost:andPort:forAddress: to create an address for a host / port pair and
 * @ref getHost:andPort:forAddress: to get the host / port pair for an address.

- (void)didResolve
{
	[self join];

# ifdef OF_HAVE_BLOCKS
	if (_block != NULL)
		_block(_host, _port, _address, _exception);
# endif
	else {
# endif
		void (*func)(id, SEL, OFString*, uint16_t,
		    of_udp_socket_address_t, OFException*) =
		    (void(*)(id, SEL, OFString*, uint16_t,
		    of_udp_socket_address_t, OFException*))[_target
		    methodForSelector: _selector];

		func(_target, _selector, _host, _port, _address, _exception);

		*port = OF_BSWAP16_IF_LE(
		    ((struct sockaddr_in*)(void*)address)->sin_port);

# if OF_HAVE_THREADS
	if (!of_mutex_unlock(&mutex))
		@throw [OFUnlockFailedException exception];
# endif

	return ret;
#endif
}

void
of_resolver_free(of_resolver_result_t **results)
{
#ifdef HAVE_THREADSAFE_GETADDRINFO