ObjFW  Diff

 * @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 resolving or nil on
 *		    success
 */
typedef void (^of_udp_socket_async_resolve_block_t)(OFString *host,
    uint16_t port, of_udp_socket_address_t address,
    OFException *OF_NULLABLE exception);
    OFException *_Nullable exception);

/*!
 * @brief A block which is called when a packet has been received.
 *
 * @param socket The UDP which received a packet
 * @param buffer The buffer the packet has been written to
 * @param length The length of the packet
 * @param sender The address of the sender of the packet
 * @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 *OF_NULLABLE exception);
    OFException *_Nullable exception);
#endif

/*!
 * @class OFUDPSocket OFUDPSocket.h ObjFW/OFUDPSocket.h
 *
 * @brief A class which provides functions to create and use UDP sockets.
 *

 *
 * @param host A pointer to an OFString*. If it is not NULL, it will be set to
 *	       the host of the host / port pair.
 * @param port A pointer to an uint16_t. If it is not NULL, the port of the
 *	       host / port pair will be written to it.
 * @param address The address for which the host and port should be retrieved
 */
+ (void)getHost: (OFString *__autoreleasing OF_NONNULL *OF_NULLABLE)host
	andPort: (uint16_t *OF_NULLABLE)port
+ (void)getHost: (OFString *__autoreleasing _Nonnull *_Nullable)host
	andPort: (uint16_t *_Nullable)port
     forAddress: (of_udp_socket_address_t*)address;

/*!
 * @brief Binds the socket to the specified host and port.
 *
 * @param host The host to bind to. Use `@"0.0.0.0"` for IPv4 or `@"::"` for
 *	       IPv6 to bind to all.