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#import "OFSequencedPacketSocket.h"
#import "OFRunLoop.h"
OF_ASSUME_NONNULL_BEGIN
/** @file */
@class OFDictionary OF_GENERIC(KeyType, ObjectType);
@class OFSCTPSocket;
@class OFString;
/**
* @brief Flags for an SCTP message.
* @brief A key for the SCTP message info.
*
* Possible values are:
*
* * @ref OFSCTPStreamID
* * @ref OFSCTPPPID
* * @ref OFSCTPUnordered
*/
typedef enum {
/** The message is sent / received out of order. */
OFSCTPMessageUnordered = 1
} OFSCTPMessageFlags;
typedef OFConstantString *OFSCTPMessageInfoKey;
/**
* @brief A dictionary mapping keys of type @ref OFSCTPMessageInfoKey to their
* values.
*/
typedef OFDictionary OF_GENERIC(OFSCTPMessageInfoKey, id) *OFSCTPMessageInfo;
#ifdef __cplusplus
extern "C" {
#endif
/**
* @brief The SCTP stream ID for which the message was send / received.
*
* This is an `uint16_t` wrapped in an @ref OFNumber.
*/
extern const OFSCTPMessageInfoKey OFSCTPStreamID;
/**
* @brief The Payload Protocol Identifier for the message.
*
* This is an `uint32_t` wrapped in an @ref OFNumber.
*/
extern const OFSCTPMessageInfoKey OFSCTPPPID;
/**
* @brief Whether the message is send / received out of order.
*
* Possible values are an @ref OFNumber with either `true` or `false`.
*/
extern const OFSCTPMessageInfoKey OFSCTPUnordered;
#ifdef __cplusplus
}
#endif
#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 message has been received.
*
* @param length The length of the message
* @param streamID The stream ID for the message
* @param PPID The Payload Protocol Identifier for the message
* @param flags Flags for the message
* @param info Information about the message, see @ref OFSCTPMessageInfo
* @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, OFSCTPMessageFlags flags, id _Nullable exception);
typedef bool (^OFSCTPSocketAsyncReceiveBlock)(size_t length,
OFSCTPMessageInfo info, id _Nullable exception);
/**
* @brief A block which is called when a message 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
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/**
* @brief This method is called when a message has been received.
*
* @param socket The SCTP socket which received a message
* @param buffer The buffer the message has been written to
* @param length The length of the message
* @param streamID The stream ID for the message
* @param PPID The Payload Protocol Identifier for the message
* @param flags Flags for the message
* @param info Information about the message, see @ref OFSCTPMessageInfo
* @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: (OFSCTPMessageFlags)flags
info: (nullable OFSCTPMessageInfo)info
exception: (nullable id)exception;
/**
* @brief This method is called when a message has been sent.
*
* @param socket The SCTP socket which sent a message
* @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 message
* @param info Information about the message, see @ref OFSCTPMessageInfo
* @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: (OFSCTPMessageFlags)flags
info: (nullable OFSCTPMessageInfo)info
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
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* @brief Receives a message for the specified stream ID and stores it into the
* specified buffer.
*
* If the buffer is too small, the message is truncated.
*
* @param buffer The buffer to write the message 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 message
* @param info Information about the message, see @ref OFSCTPMessageInfo
* @return The length of the received message
* @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
info: (__autoreleasing _Nullable OFSCTPMessageInfo
*_Nullable)info;
flags: (nullable OFSCTPMessageFlags *)flags;
/**
* @brief Asynchronously receives a message with stream ID and PPID and stores
* it into the specified buffer.
* @brief Asynchronously receives a message and stores it into the specified
* buffer.
*
* If the buffer is too small, the message is truncated.
*
* @param buffer The buffer to write the message to
* @param length The length of the buffer
*/
- (void)asyncReceiveWithInfoIntoBuffer: (void *)buffer
length: (size_t)length;
/**
* @brief Asynchronously receives a message with stream ID and PPID and stores
* it into the specified buffer.
* @brief Asynchronously receives a message and stores it into the specified
* buffer.
*
* If the buffer is too small, the message is truncated.
*
* @param buffer The buffer to write the message to
* @param length The length of the buffer
* @param runLoopMode The run loop mode in which to perform the asynchronous
* receive
*/
- (void)asyncReceiveWithInfoIntoBuffer: (void *)buffer
length: (size_t)length
runLoopMode: (OFRunLoopMode)runLoopMode;
#ifdef OF_HAVE_BLOCKS
/**
* @brief Asynchronously receives a message with stream ID and PPID and stores
* it into the specified buffer.
* @brief Asynchronously receives a message and stores it into the specified
* buffer.
*
* If the buffer is too small, the message is truncated.
*
* @param buffer The buffer to write the message to
* @param length The length of the buffer
* @param block The block to call when the message has been received. If the
* block returns true, it will be called again with the same
* buffer and maximum length when more messages have been received.
* If you want the next method in the queue to handle the message
* received next, you need to return false from the method.
*/
- (void)asyncReceiveWithInfoIntoBuffer: (void *)buffer
length: (size_t)length
block: (OFSCTPSocketAsyncReceiveBlock)block;
/**
* @brief Asynchronously receives a message with stream ID and PPID and stores
* it into the specified buffer.
* @brief Asynchronously receives a message and stores it into the specified
* buffer.
*
* If the buffer is too small, the message is truncated.
*
* @param buffer The buffer to write the message to
* @param length The length of the buffer
* @param runLoopMode The run loop mode in which to perform the asynchronous
* receive
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#endif
/**
* @brief Sends the specified message on the specified stream.
*
* @param buffer The buffer to send as a message
* @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 message
* @param info Information about the message, see @ref OFSCTPMessageInfo
* @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: (OFSCTPMessageFlags)flags;
info: (nullable OFSCTPMessageInfo)info;
/**
* @brief Asynchronously sends the specified message on the specified stream.
*
* @param data The data to send as a message
* @param streamID The stream ID for the message
* @param PPID The Payload Protocol Identifier for the message
* @param flags Flags for the message
* @param info Information about the message, see @ref OFSCTPMessageInfo
*/
- (void)asyncSendData: (OFData *)data
- (void)asyncSendData: (OFData *)data info: (nullable OFSCTPMessageInfo)info;
streamID: (uint16_t)streamID
PPID: (uint32_t)PPID
flags: (OFSCTPMessageFlags)flags;
/**
* @brief Asynchronously sends the specified message on the specified stream.
*
* @param data The data to send as a message
* @param streamID The stream ID for the message
* @param PPID The Payload Protocol Identifier for the message
* @param flags Flags for the message
* @param info Information about the message, see @ref OFSCTPMessageInfo
* @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: (OFSCTPMessageFlags)flags
info: (nullable OFSCTPMessageInfo)info
runLoopMode: (OFRunLoopMode)runLoopMode;
#ifdef OF_HAVE_BLOCKS
/**
* @brief Asynchronously sends the specified message on the specified stream.
*
* @param data The data to send as a message
* @param streamID The stream ID for the message
* @param PPID The Payload Protocol Identifier for the message
* @param flags Flags for the message
* @param info Information about the message, see @ref OFSCTPMessageInfo
* @param block The block to call when the message 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: (OFSCTPMessageFlags)flags
info: (nullable OFSCTPMessageInfo)info
block: (OFSCTPSocketAsyncSendDataBlock)block;
/**
* @brief Asynchronously sends the specified message on the specified stream.
*
* @param data The data to send as a message
* @param streamID The stream ID for the message
* @param PPID The Payload Protocol Identifier for the message
* @param flags Flags for the message
* @param info Information about the message, see @ref OFSCTPMessageInfo
* @param runLoopMode The run loop mode in which to perform the asynchronous
* send
* @param block The block to call when the message 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: (OFSCTPMessageFlags)flags
info: (nullable OFSCTPMessageInfo)info
runLoopMode: (OFRunLoopMode)runLoopMode
block: (OFSCTPSocketAsyncSendDataBlock)block;
#endif
@end
OF_ASSUME_NONNULL_END
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