Message API provides functions to create NDEF message and insert/remove records in NDEF message.

Required Header

#include <nfc.h>

Overview

The NDEF message api provides functions to make NDEF message

create / destroy NDEF message
insert / remove NDEF record
get NDEF record from NDEF message

Related Features

This API is related with the following features:

http://tizen.org/feature/network.nfc

It is recommended to design feature related codes in your application for reliability.

You can check if a device supports the related features for this API by using System Information, thereby controlling the procedure of your application.

To ensure your application is only running on the device with specific features, please define the features in your manifest file using the manifest editor in the SDK.

More details on featuring your application can be found from Feature Element.

Functions
int	nfc_ndef_message_create (nfc_ndef_message_h *ndef_message)
	Creates NDEF message handle.
int	nfc_ndef_message_create_from_rawdata (nfc_ndef_message_h ndef_message, const unsigned char rawdata, unsigned int rawdata_size)
	Creates NDEF message handle from raw serial bytes.
int	nfc_ndef_message_destroy (nfc_ndef_message_h ndef_message)
	Destroys NDEF message handle.
int	nfc_ndef_message_get_record_count (nfc_ndef_message_h ndef_message, int *count)
	Gets the number of record in NDEF message.
int	nfc_ndef_message_get_rawdata (nfc_ndef_message_h ndef_message, unsigned char *rawdata, unsigned int rawdata_size)
	Gets serial bytes array of NDEF message.
int	nfc_ndef_message_append_record (nfc_ndef_message_h ndef_message, nfc_ndef_record_h record)
	Appends a record into NDEF message.
int	nfc_ndef_message_insert_record (nfc_ndef_message_h ndef_message, int index, nfc_ndef_record_h record)
	Inserts a record at index into NDEF message.
int	nfc_ndef_message_remove_record (nfc_ndef_message_h ndef_message, int index)
	Removes the record that indicated by index number and this deleted record will be freed.
int	nfc_ndef_message_get_record (nfc_ndef_message_h ndef_message, int index, nfc_ndef_record_h *record)
	Gets record by index.
Typedefs
typedef struct _ndef_message_s *	nfc_ndef_message_h
	The handle to the NDEF message.

Typedef Documentation

typedef struct _ndef_message_s* nfc_ndef_message_h

The handle to the NDEF message.

Since :: 2.3

Function Documentation

int nfc_ndef_message_append_record	(	nfc_ndef_message_h	ndef_message,
		nfc_ndef_record_h	record
	)

Appends a record into NDEF message.

Since :: 2.3

Remarks:: Appended record is handled by frameworks. The record is released by frameworks when message is released.

Parameters:

[in]	ndef_message	The handle to NDEF message
[in]	record	The record that will be appended into NDEF message

Returns:: 0 on success, otherwise a negative error value.

Return values:

NFC_ERROR_NONE	Successful
NFC_ERROR_NOT_SUPPORTED	Not supported NFC
NFC_ERROR_NOT_INITIALIZED	Not initialized NFC
NFC_ERROR_INVALID_PARAMETER	Invalid parameter

See also:: nfc_ndef_message_insert_record(); nfc_ndef_message_remove_record(); nfc_manager_initialize()

int nfc_ndef_message_create ( nfc_ndef_message_h * ndef_message )

Creates NDEF message handle.

Since :: 2.3

Remarks:: The ndef_message should be released using nfc_ndef_message_destroy().

Parameters:

[out] ndef_message A handle to NDEF message

Returns:: 0 on success, otherwise a negative error value.

Return values:

NFC_ERROR_NONE	Successful
NFC_ERROR_NOT_SUPPORTED	Not supported NFC
NFC_ERROR_NOT_INITIALIZED	Not initialized NFC
NFC_ERROR_INVALID_PARAMETER	Invalid parameter
NFC_ERROR_OUT_OF_MEMORY	Out of memory

See also:: nfc_ndef_message_create_from_rawdata(); nfc_ndef_message_destroy(); nfc_manager_initialize()

int nfc_ndef_message_create_from_rawdata	(	nfc_ndef_message_h *	ndef_message,
		const unsigned char *	rawdata,
		unsigned int	rawdata_size
	)

Creates NDEF message handle from raw serial bytes.

Since :: 2.3

Remarks:: The ndef_message should be released using nfc_ndef_message_destroy().; It consumes the bytes array until get the ME (Message End) flag*. It returns error if the bytes array does not have ME flag.
*The ME flag is a 1-bit field that when set indicates the end of an NDEF message.

Parameters:

[out]	ndef_message	The handle to NDEF message
[in]	rawdata	The NDEF message in form of bytes array
[in]	rawdata_size	The size of bytes array

Returns:: 0 on success, otherwise a negative error value.

Return values:

NFC_ERROR_NONE	Successful
NFC_ERROR_NOT_SUPPORTED	Not supported NFC
NFC_ERROR_NOT_INITIALIZED	Not initialized NFC
NFC_ERROR_INVALID_PARAMETER	Invalid parameter
NFC_ERROR_OUT_OF_MEMORY	Out of memory

See also:: nfc_ndef_message_create(); nfc_ndef_message_destroy(); nfc_ndef_message_get_rawdata(); nfc_manager_initialize()

int nfc_ndef_message_destroy ( nfc_ndef_message_h ndef_message )

Destroys NDEF message handle.

Since :: 2.3

Remarks:: This function will free all these memory including record handles.

Parameters:

[in] ndef_message The handle to NDEF message to destroy

Returns:: 0 on success, otherwise a negative error value.

Return values:

NFC_ERROR_NONE	Successful
NFC_ERROR_NOT_SUPPORTED	Not supported NFC
NFC_ERROR_NOT_INITIALIZED	Not initialized NFC
NFC_ERROR_INVALID_PARAMETER	Invalid parameter

See also:: nfc_ndef_message_create(); nfc_ndef_message_create_from_rawdata(); nfc_manager_initialize()

int nfc_ndef_message_get_rawdata	(	nfc_ndef_message_h	ndef_message,
		unsigned char **	rawdata,
		unsigned int *	rawdata_size
	)

Gets serial bytes array of NDEF message.

Since :: 2.3

Remarks:: It gets copy of the bytes array from NDEF message. rawdata must be released with free() by you.

Parameters:

[in]	ndef_message	The handle to NDEF message
[out]	rawdata	The bytes array of bytes array
[out]	rawdata_size	The size of bytes array in byte

Returns:: 0 on success, otherwise a negative error value.

Return values:

NFC_ERROR_NONE	Successful
NFC_ERROR_NOT_SUPPORTED	Not supported NFC
NFC_ERROR_NOT_INITIALIZED	Not initialized NFC
NFC_ERROR_INVALID_PARAMETER	Invalid parameter
NFC_ERROR_OUT_OF_MEMORY	Out of memory
NFC_ERROR_INVALID_NDEF_MESSAGE	Invalid NDEF message

See also:: nfc_ndef_message_create_from_rawdata(); nfc_manager_initialize()

int nfc_ndef_message_get_record	(	nfc_ndef_message_h	ndef_message,
		int	index,
		nfc_ndef_record_h *	record
	)

Gets record by index.

Since :: 2.3

Remarks:: The record should not be released.; The record is managed by the platform and will be released when MTP service stops.; This function just return the pointer of record. if you change the record value it directly affects the NDEF message

Parameters:

[in]	ndef_message	The handle to NDEF message
[in]	index	The index of record ( starts from 0 )
[out]	record	The handle to record

Returns:: 0 on success, otherwise a negative error value.

Return values:

NFC_ERROR_NONE	Successful
NFC_ERROR_NOT_SUPPORTED	Not supported NFC
NFC_ERROR_NOT_INITIALIZED	Not initialized NFC
NFC_ERROR_INVALID_PARAMETER	Invalid parameter

See also:: nfc_manager_initialize()

int nfc_ndef_message_get_record_count	(	nfc_ndef_message_h	ndef_message,
		int *	count
	)

Gets the number of record in NDEF message.

Since :: 2.3

Parameters:

[in]	ndef_message	The handle to NDEF message
[out]	count	The number of record

Returns:: 0 on success, otherwise a negative error value.

Return values:

NFC_ERROR_NONE	Successful
NFC_ERROR_NOT_SUPPORTED	Not supported NFC
NFC_ERROR_NOT_INITIALIZED	Not initialized NFC
NFC_ERROR_INVALID_PARAMETER	Invalid parameter

See also:: nfc_manager_initialize()

int nfc_ndef_message_insert_record	(	nfc_ndef_message_h	ndef_message,
		int	index,
		nfc_ndef_record_h	record
	)

Inserts a record at index into NDEF message.

Since :: 2.3

Remarks:: Appended record is handled by frameworks. The record is released by frameworks when message is released.
The index value should not bigger than nfc_ndef_message_get_record_count()

Parameters:

[in]	ndef_message	The handle to NDEF message
[in]	index	The index of record ( starts from 0 )
[in]	record	The record that will be appended into NDEF message

Returns:: 0 on success, otherwise a negative error value.

Return values:

NFC_ERROR_NONE	Successful
NFC_ERROR_NOT_SUPPORTED	Not supported NFC
NFC_ERROR_NOT_INITIALIZED	Not initialized NFC
NFC_ERROR_INVALID_PARAMETER	Invalid parameter
NFC_ERROR_INVALID_NDEF_MESSAGE	Invalid NDEF message

See also:: nfc_ndef_message_append_record(); nfc_ndef_message_remove_record(); nfc_manager_initialize()

int nfc_ndef_message_remove_record	(	nfc_ndef_message_h	ndef_message,
		int	index
	)

Removes the record that indicated by index number and this deleted record will be freed.

Since :: 2.3

Parameters:

[in]	ndef_message	The handle to NDEF message
[in]	index	The index of record ( starts from 0 )

Returns:: 0 on success, otherwise a negative error value.

Return values:

NFC_ERROR_NONE	Successful
NFC_ERROR_NOT_SUPPORTED	Not supported NFC
NFC_ERROR_NOT_INITIALIZED	Not initialized NFC
NFC_ERROR_INVALID_PARAMETER	Invalid parameter
NFC_ERROR_INVALID_NDEF_MESSAGE	Invalid NDEF message

See also:: nfc_ndef_message_append_record(); nfc_ndef_message_insert_record(); nfc_manager_initialize()

Required Header

Overview

Related Features

Functions

Typedefs

Typedef Documentation

Function Documentation