ObjFW  Diff

 * @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 (^OFDatagramSocketAsyncReceiveBlock)(size_t length,
    const of_socket_address_t *_Nonnull sender, id _Nullable exception);

/**
 * @brief A block which is called when a packet has been sent.
 *
 * @param data The data which was sent
 * @param receiver The receiver for the packet
 * @param exception An exception which occurred while reading or `nil` on
 *		    success
 * @return The data to repeat the send with or nil if it should not repeat
 */
typedef OFData *_Nullable (^OFDatagramSocketAsyncSendDataBlock)(
    OFData *_Nonnull data, const of_socket_address_t *_Nonnull receiver,
    id _Nullable exception);
#endif

/**
 * @protocol OFDatagramSocketDelegate OFDatagramSocket.h \
 *	     ObjFW/OFDatagramSocket.h
 *

 * @param exception An exception that occurred while receiving, or nil on
 *		    success
 * @return A bool whether the same block should be used for the next receive
 */
-	  (bool)socket: (OFDatagramSocket *)socket
  didReceiveIntoBuffer: (void *)buffer
		length: (size_t)length
		sender: (const of_socket_address_t *_Nonnull)sender
	     exception: (nullable id)exception;

/**
 * @brief This method is called when a packet has been sent.
 *
 * @param socket The datagram socket which sent a packet
 * @param data The data which was sent
 * @param receiver The receiver for the packet
 * @param exception An exception that occurred while sending, or nil on success
 * @return The data to repeat the send with or nil if it should not repeat
 */
- (nullable OFData *)socket: (OFDatagramSocket *)socket
		didSendData: (OFData *)data
		   receiver: (const of_socket_address_t *_Nonnull)receiver
		  exception: (nullable id)exception;
@end

/**
 * @class OFDatagramSocket OFDatagramSocket.h ObjFW/OFDatagramSocket.h
 *
 * @brief A base class for datagram sockets.

/**
 * @brief Receives a datagram and stores it into the specified buffer.
 *
 * If the buffer is too small, the datagram is truncated.
 *
 * @param buffer The buffer to write the datagram to
 * @param length The length of the buffer
 * @param sender A pointer to an @ref of_socket_address_t, which will be set to
 *		 the address of the sender
 * @return The length of the received datagram
 */
- (size_t)receiveIntoBuffer: (void *)buffer
		     length: (size_t)length
		     sender: (of_socket_address_t *)sender;

/**
 * @brief Asynchronously receives a datagram and stores it into the specified
 *	  buffer.
 *
 * If the buffer is too small, the datagram is truncated.
 *

#endif

/**
 * @brief Sends the specified datagram to the specified address.
 *
 * @param buffer The buffer to send as a datagram
 * @param length The length of the buffer
 * @param receiver A pointer to an @ref of_socket_address_t to which the
 *		   datagram should be sent
 */
- (void)sendBuffer: (const void *)buffer
	    length: (size_t)length
	  receiver: (const of_socket_address_t *)receiver;

/**
 * @brief Asynchronously sends the specified datagram to the specified address.
 *
 * @param data The data to send as a datagram
 * @param receiver A pointer to an @ref of_socket_address_t to which the
 *		   datagram should be sent. The receiver is copied.
 */
- (void)asyncSendData: (OFData *)data
	     receiver: (const of_socket_address_t *)receiver;

/**
 * @brief Asynchronously sends the specified datagram to the specified address.
 *
 * @param data The data to send as a datagram
 * @param receiver A pointer to an @ref of_socket_address_t to which the
 *		   datagram should be sent. The receiver is copied.
 * @param runLoopMode The run loop mode in which to perform the async send
 */
- (void)asyncSendData: (OFData *)data
	     receiver: (const of_socket_address_t *)receiver
	  runLoopMode: (OFRunLoopMode)runLoopMode;

#ifdef OF_HAVE_BLOCKS
/**
 * @brief Asynchronously sends the specified datagram to the specified address.
 *
 * @param data The data to send as a datagram
 * @param receiver A pointer to an @ref of_socket_address_t to which the
 *		   datagram should be sent. The receiver is copied.
 * @param block The block to call when the packet has been sent. It should
 *		return the data for the next send with the same callback or nil
 *		if it should not repeat.
 */
- (void)asyncSendData: (OFData *)data
	     receiver: (const of_socket_address_t *)receiver
		block: (OFDatagramSocketAsyncSendDataBlock)block;

/**
 * @brief Asynchronously sends the specified datagram to the specified address.
 *
 * @param data The data to send as a datagram
 * @param receiver A pointer to an @ref of_socket_address_t to which the
 *		   datagram should be sent. The receiver is copied.
 * @param runLoopMode The run loop mode in which to perform the async send
 * @param block The block to call when the packet has been sent. It should
 *		return the data for the next send with the same callback or nil
 *		if it should not repeat.
 */
- (void)asyncSendData: (OFData *)data
	     receiver: (const of_socket_address_t *)receiver
	  runLoopMode: (OFRunLoopMode)runLoopMode
		block: (OFDatagramSocketAsyncSendDataBlock)block;
#endif

/**
 * @brief Cancels all pending asynchronous requests on the socket.
 */