ObjFW  Check-in [c4c40e01a8]

     block: (nullable OFSCTPSocketAsyncReceiveBlock)block
#  endif
  delegate: (nullable id <OFSCTPSocketDelegate>)delegate;
+ (void)of_addAsyncSendForSCTPSocket: (OFSCTPSocket *)socket
      data: (OFData *)data
  streamID: (uint16_t)streamID
      PPID: (uint32_t)PPID
     flags: (OFSCTPPacketFlags)flags
      mode: (OFRunLoopMode)mode
# ifdef OF_HAVE_BLOCKS
     block: (nullable OFSCTPSocketAsyncSendDataBlock)block
# endif
  delegate: (nullable id <OFSCTPSocketDelegate>)delegate;
# endif
+ (void)of_cancelAsyncRequestsForObject: (id)object mode: (OFRunLoopMode)mode;

@public
#  ifdef OF_HAVE_BLOCKS
	OFSCTPSocketAsyncSendDataBlock _block;
#  endif
	OFData *_data;
	uint16_t _streamID;
	uint32_t _PPID;
	OFSCTPPacketFlags _flags;
}
@end
# endif
#endif

@implementation OFRunLoopState
- (instancetype)init

# ifdef OF_HAVE_SCTP
@implementation OFRunLoopSCTPReceiveQueueItem
- (bool)handleObject: (id)object
{
	size_t length;
	uint16_t streamID;
	uint32_t PPID;
	OFSCTPPacketFlags flags;
	id exception = nil;

	@try {
		length = [object receiveIntoBuffer: _buffer
					    length: _length
					  streamID: &streamID
					      PPID: &PPID
					     flags: &flags];
	} @catch (id e) {
		length = 0;
		exception = e;
	}

#  ifdef OF_HAVE_BLOCKS
	if (_block != NULL)
		return _block(length, streamID, PPID, flags, exception);
	else {
#  endif
		if (![_delegate respondsToSelector: @selector(socket:
		    didReceiveIntoBuffer:length:streamID:PPID:flags:
		    exception:)])
			return false;

		return [_delegate socket: object
		    didReceiveIntoBuffer: _buffer
				  length: length
				streamID: streamID
				    PPID: PPID
				   flags: flags
			       exception: exception];
#  ifdef OF_HAVE_BLOCKS
	}
#  endif
}

# ifdef OF_HAVE_BLOCKS

	id exception = nil;
	OFData *newData, *oldData;

	@try {
		[object sendBuffer: _data.items
			    length: _data.count * _data.itemSize
			  streamID: _streamID
			      PPID: _PPID
			     flags: _flags];
	} @catch (id e) {
		exception = e;
	}

#  ifdef OF_HAVE_BLOCKS
	if (_block != NULL) {
		newData = _block(exception);

		if (newData == nil)
			return false;

		oldData = _data;
		_data = [newData copy];
		[oldData release];

		return true;
	} else {
#  endif
		if (![_delegate respondsToSelector: @selector(socket:
		    didSendData:streamID:PPID:flags:exception:)])
			return false;

		newData = [_delegate socket: object
				didSendData: _data
				   streamID: _streamID
				       PPID: _PPID
				      flags: _flags
				  exception: exception];

		if (newData == nil)
			return false;

		oldData = _data;
		_data = [newData copy];

	QUEUE_ITEM
}

+ (void)of_addAsyncSendForSCTPSocket: (OFSCTPSocket *)sock
				data: (OFData *)data
			    streamID: (uint16_t)streamID
				PPID: (uint32_t)PPID
			       flags: (OFSCTPPacketFlags)flags
				mode: (OFRunLoopMode)mode
# ifdef OF_HAVE_BLOCKS
			       block: (OFSCTPSocketAsyncSendDataBlock)block
# endif
			    delegate: (id <OFSCTPSocketDelegate>)delegate
{
	NEW_WRITE(OFRunLoopSCTPSendQueueItem, sock, mode)

	queueItem->_delegate = [delegate retain];
# ifdef OF_HAVE_BLOCKS
	queueItem->_block = [block copy];
# endif
	queueItem->_data = [data copy];
	queueItem->_streamID = streamID;
	queueItem->_PPID = PPID;
	queueItem->_flags = flags;

	QUEUE_ITEM
}
# endif
# undef NEW_READ
# undef NEW_WRITE
# undef QUEUE_ITEM

OF_ASSUME_NONNULL_BEGIN

/** @file */

@class OFSCTPSocket;
@class OFString;

/**
 * @brief Flags for an SCTP packet.
 */
typedef enum {
	/** The packet is sent / received out of order. */
	OFSCTPPacketUnordered = 1
} OFSCTPPacketFlags;

#ifdef OF_HAVE_BLOCKS
/**
 * @brief A block which is called when the socket connected.
 *
 * @param exception An exception which occurred while connecting the socket or
 *		    `nil` on success
 */
typedef void (^OFSCTPSocketAsyncConnectBlock)(id _Nullable exception);

/**
 * @brief A block which is called when a packet has been received.
 *
 * @param length The length of the packet
 * @param streamID The stream ID for the message
 * @param PPID The Payload Protocol Identifier for the message
 * @param flags Flags for 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 (^OFSCTPSocketAsyncReceiveBlock)(size_t length, uint16_t streamID,
    uint32_t PPID, OFSCTPPacketFlags flags, id _Nullable exception);

/**
 * @brief A block which is called when a packet has been sent.
 *
 * @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

 * @brief This method is called when a packet has been received.
 *
 * @param socket The sequenced packet socket which received a packet
 * @param buffer The buffer the packet has been written to
 * @param length The length of the packet
 * @param streamID The stream ID for the message
 * @param PPID The Payload Protocol Identifier for the message
 * @param flags Flags for the packet
 * @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: (OFSCTPSocket *)socket
  didReceiveIntoBuffer: (void *)buffer
		length: (size_t)length
	      streamID: (uint16_t)streamID
		  PPID: (uint32_t)PPID
		 flags: (OFSCTPPacketFlags)flags
	     exception: (nullable id)exception;

/**
 * @brief This method is called when a packet has been sent.
 *
 * @param socket The sequenced packet socket which sent a packet
 * @param data The data which was sent
 * @param streamID The stream ID for the message
 * @param PPID The Payload Protocol Identifier for the message
 * @param flags Flags 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: (OFSCTPSocket *)socket
		didSendData: (OFData *)data
		   streamID: (uint16_t)streamID
		       PPID: (uint32_t)PPID
		      flags: (OFSCTPPacketFlags)flags
		  exception: (nullable id)exception;
@end

/**
 * @class OFSCTPSocket OFSCTPSocket.h ObjFW/OFSCTPSocket.h
 *
 * @brief A class which provides methods to create and use SCTP sockets in

 *
 * If the buffer is too small, the packet is truncated.
 *
 * @param buffer The buffer to write the packet to
 * @param length The length of the buffer
 * @param streamID The stream ID for the message
 * @param PPID The Payload Protocol Identifier for the message
 * @param flags Flags for the packet
 * @return The length of the received packet
 * @throw OFReadFailedException Receiving failed
 * @throw OFNotOpenException The socket is not open
 */
- (size_t)receiveIntoBuffer: (void *)buffer
		     length: (size_t)length
		   streamID: (nullable uint16_t *)streamID
		       PPID: (nullable uint32_t *)PPID
		      flags: (nullable OFSCTPPacketFlags *)flags;

/**
 * @brief Asynchronously receives a packet with stream ID and PPID and stores
 *	  it into the specified buffer.
 *
 * If the buffer is too small, the packet is truncated.
 *

/**
 * @brief Sends the specified packet on the specified stream.
 *
 * @param buffer The buffer to send as a packet
 * @param length The length of the buffer
 * @param streamID The stream ID for the message
 * @param PPID The Payload Protocol Identifier for the message
 * @param flags Flags for the packet
 * @throw OFWriteFailedException Sending failed
 * @throw OFNotOpenException The socket is not open
 */
- (void)sendBuffer: (const void *)buffer
	    length: (size_t)length
	  streamID: (uint16_t)streamID
	      PPID: (uint32_t)PPID
	     flags: (OFSCTPPacketFlags)flags;

/**
 * @brief Asynchronously sends the specified packet on the specified stream.
 *
 * @param data The data to send as a packet
 * @param streamID The stream ID for the message
 * @param PPID The Payload Protocol Identifier for the message
 * @param flags Flags for the packet
 */
- (void)asyncSendData: (OFData *)data
	     streamID: (uint16_t)streamID
		 PPID: (uint32_t)PPID
		flags: (OFSCTPPacketFlags)flags;

/**
 * @brief Asynchronously sends the specified packet on the specified stream.
 *
 * @param data The data to send as a packet
 * @param streamID The stream ID for the message
 * @param PPID The Payload Protocol Identifier for the message
 * @param flags Flags for the packet
 * @param runLoopMode The run loop mode in which to perform the asynchronous
 *		      send
 */
- (void)asyncSendData: (OFData *)data
	     streamID: (uint16_t)streamID
		 PPID: (uint32_t)PPID
		flags: (OFSCTPPacketFlags)flags
	  runLoopMode: (OFRunLoopMode)runLoopMode;

#ifdef OF_HAVE_BLOCKS
/**
 * @brief Asynchronously sends the specified packet on the specified stream.
 *
 * @param data The data to send as a packet
 * @param streamID The stream ID for the message
 * @param PPID The Payload Protocol Identifier for the message
 * @param flags Flags for the packet
 * @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
	     streamID: (uint16_t)streamID
		 PPID: (uint32_t)PPID
		flags: (OFSCTPPacketFlags)flags
		block: (OFSCTPSocketAsyncSendDataBlock)block;

/**
 * @brief Asynchronously sends the specified packet on the specified stream.
 *
 * @param data The data to send as a packet
 * @param streamID The stream ID for the message
 * @param PPID The Payload Protocol Identifier for the message
 * @param flags Flags for the packet
 * @param runLoopMode The run loop mode in which to perform the asynchronous
 *		      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
	     streamID: (uint16_t)streamID
		 PPID: (uint32_t)PPID
		flags: (OFSCTPPacketFlags)flags
	  runLoopMode: (OFRunLoopMode)runLoopMode
		block: (OFSCTPSocketAsyncSendDataBlock)block;
#endif
@end

OF_ASSUME_NONNULL_END

#endif

- (size_t)receiveIntoBuffer: (void *)buffer length: (size_t)length
{
	return [self receiveIntoBuffer: buffer
				length: length
			      streamID: NULL
				  PPID: NULL
				 flags: NULL];
}

- (size_t)receiveIntoBuffer: (void *)buffer
		     length: (size_t)length
		   streamID: (uint16_t *)streamID
		       PPID: (uint32_t *)PPID
		      flags: (OFSCTPPacketFlags *)flags
{
	ssize_t ret;
	struct iovec iov = {
		.iov_base = buffer,
		.iov_len = length
	};
	struct sctp_rcvinfo rcvinfo;

	if (PPID != NULL) {
		if (infotype == SCTP_RECVV_RCVINFO &&
		    rcvinfoSize >= (socklen_t)sizeof(rcvinfo))
			*PPID = rcvinfo.rcv_ppid;
		else
			*PPID = 0;
	}

	if (flags != NULL) {
		*flags = 0;

		if (infotype == SCTP_RECVV_RCVINFO &&
		    rcvinfoSize >= (socklen_t)sizeof(rcvinfo) &&
		    rcvinfo.rcv_flags & SCTP_UNORDERED)
			*flags |= OFSCTPPacketUnordered;
	}

	return ret;
}

- (void)asyncReceiveWithInfoIntoBuffer: (void *)buffer
				length: (size_t)length
{

					     block: block
					  delegate: nil];
}
#endif

- (void)sendBuffer: (const void *)buffer length: (size_t)length
{
	[self sendBuffer: buffer length: length streamID: 0 PPID: 0 flags: 0];
}

- (void)sendBuffer: (const void *)buffer
	    length: (size_t)length
	  streamID: (uint16_t)streamID
	      PPID: (uint32_t)PPID
	     flags: (OFSCTPPacketFlags)flags
{
	ssize_t bytesWritten;
	struct iovec iov = {
		.iov_base = (void *)buffer,
		.iov_len = length
	};
	struct sctp_sndinfo sndinfo = {
		.snd_sid = streamID,
		.snd_ppid = PPID,
		.snd_flags =
		    ((flags & OFSCTPPacketUnordered) ? SCTP_UNORDERED : 0),
	};

	if (_socket == OFInvalidSocketHandle)
		@throw [OFNotOpenException exceptionWithObject: self];

	if (length > SSIZE_MAX)
		@throw [OFOutOfRangeException exception];

						      bytesWritten: bytesWritten
							     errNo: 0];
}

- (void)asyncSendData: (OFData *)data
	     streamID: (uint16_t)streamID
		 PPID: (uint32_t)PPID
		flags: (OFSCTPPacketFlags)flags
{
	[self asyncSendData: data
		   streamID: streamID
		       PPID: PPID
		      flags: flags
		runLoopMode: OFDefaultRunLoopMode];
}

- (void)asyncSendData: (OFData *)data
	     streamID: (uint16_t)streamID
		 PPID: (uint32_t)PPID
		flags: (OFSCTPPacketFlags)flags
	  runLoopMode: (OFRunLoopMode)runLoopMode
{
	[OFRunLoop of_addAsyncSendForSCTPSocket: self
					   data: data
				       streamID: streamID
					   PPID: PPID
					  flags: flags
					   mode: runLoopMode
# ifdef OF_HAVE_BLOCKS
					  block: NULL
# endif
				       delegate: _delegate];
}

#ifdef OF_HAVE_BLOCKS
- (void)asyncSendData: (OFData *)data
	     streamID: (uint16_t)streamID
		 PPID: (uint32_t)PPID
		flags: (OFSCTPPacketFlags)flags
		block: (OFSequencedPacketSocketAsyncSendDataBlock)block
{
	[self asyncSendData: data
		   streamID: streamID
		       PPID: PPID
		      flags: flags
		runLoopMode: OFDefaultRunLoopMode
		      block: block];
}

- (void)asyncSendData: (OFData *)data
	     streamID: (uint16_t)streamID
		 PPID: (uint32_t)PPID
		flags: (OFSCTPPacketFlags)flags
	  runLoopMode: (OFRunLoopMode)runLoopMode
		block: (OFSequencedPacketSocketAsyncSendDataBlock)block
{
	[OFRunLoop of_addAsyncSendForSCTPSocket: self
					   data: data
				       streamID: streamID
					   PPID: PPID
					  flags: flags
					   mode: runLoopMode
					  block: block
				       delegate: nil];
}
#endif

- (void)setCanDelaySendingPackets: (bool)canDelaySendingPackets

 * @brief Asserts that the specified condition is true.
 *
 * @param condition The condition to check
 * @param ... An optional format string to print if the assertion failed,
 *	      followed by optional arguments
 */
#define OTAssertTrue(condition, ...) \
	OTAssert((condition) == true, ## __VA_ARGS__)

/**
 * @brief Asserts that the specified condition is false.
 *
 * @param condition The condition to check
 * @param ... An optional format string to print if the assertion failed,
 *	      followed by optional arguments
 */
#define OTAssertFalse(condition, ...) \
	OTAssert((condition) == false, ## __VA_ARGS__)

/**
 * @brief Asserts that the two values are equal.
 *
 * @param a The value to check
 * @param b The expected value
 * @param ... An optional format string to print if the assertion failed,

- (void)testSCTPSocket
{
	OFSCTPSocket *server, *client, *accepted;
	OFSocketAddress address;
	char buffer[6];
	uint16_t streamID;
	uint32_t PPID;
	OFSCTPPacketFlags flags;

	server = [OFSCTPSocket socket];
	client = [OFSCTPSocket socket];

	@try {
		address = [server bindToHost: @"127.0.0.1" port: 0];
	} @catch (OFBindSocketFailedException *e) {

	[client connectToHost: @"127.0.0.1"
			 port: OFSocketAddressIPPort(&address)];

	accepted = [server accept];
	OTAssertEqualObjects(OFSocketAddressString(accepted.remoteAddress),
	    @"127.0.0.1");

	[client sendBuffer: "Hello!"
		    length: 6
		  streamID: 1
		      PPID: 1234
		     flags: OFSCTPPacketUnordered];

	[accepted receiveIntoBuffer: buffer
			     length: 6
			   streamID: &streamID
			       PPID: &PPID
			      flags: &flags];
	OTAssertEqual(memcmp(buffer, "Hello!", 6), 0);
	OTAssertEqual(streamID, 1);
	OTAssertEqual(PPID, 1234);
	OTAssertTrue(flags & OFSCTPPacketUnordered);
}
@end