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186
COMPONENTS/nfc/ndef/generic/message/nfc_ndef_msg.c Normal file
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/**
* Copyright (c) 2015 - 2017, Nordic Semiconductor ASA
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form, except as embedded into a Nordic
* Semiconductor ASA integrated circuit in a product or a software update for
* such product, must reproduce the above copyright notice, this list of
* conditions and the following disclaimer in the documentation and/or other
* materials provided with the distribution.
*
* 3. Neither the name of Nordic Semiconductor ASA nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* 4. This software, with or without modification, must only be used with a
* Nordic Semiconductor ASA integrated circuit.
*
* 5. Any software provided in binary form under this license must not be reverse
* engineered, decompiled, modified and/or disassembled.
*
* THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include "sdk_config.h"
#if NFC_NDEF_MSG_ENABLED
#include "app_util.h"
#include "nfc_ndef_msg.h"
#include "nordic_common.h"
#include "nrf.h"
#define TYPE_4_TAG 4U ///< Type 4 Tag identifier.
#define NLEN_FIELD_SIZE 2U ///< Size of NLEN field, used to encode NDEF message for Type 4 Tag.
/**
* @brief Resolve the value of record location flags of the NFC NDEF record within an NFC NDEF message.
*/
__STATIC_INLINE nfc_ndef_record_location_t record_location_get(uint32_t index,
uint32_t record_count)
{
nfc_ndef_record_location_t record_location;
if (index == 0)
{
if (record_count == 1)
{
record_location = NDEF_LONE_RECORD;
}
else
{
record_location = NDEF_FIRST_RECORD;
}
}
else if (record_count == index + 1)
{
record_location = NDEF_LAST_RECORD;
}
else
{
record_location = NDEF_MIDDLE_RECORD;
}
return record_location;
}
ret_code_t nfc_ndef_msg_encode(nfc_ndef_msg_desc_t const * p_ndef_msg_desc,
uint8_t * p_msg_buffer,
uint32_t * const p_msg_len)
{
nfc_ndef_record_location_t record_location;
uint32_t temp_len;
uint32_t i;
uint32_t err_code;
uint32_t sum_of_len = 0;
if ((p_ndef_msg_desc == NULL) || p_msg_len == NULL)
{
return NRF_ERROR_NULL;
}
nfc_ndef_record_desc_t * * pp_record_rec_desc = p_ndef_msg_desc->pp_record;
if (p_ndef_msg_desc->pp_record == NULL)
{
return NRF_ERROR_NULL;
}
#if NFC_NDEF_MSG_TAG_TYPE == TYPE_4_TAG
uint8_t * p_root_msg_buffer = p_msg_buffer;
if (p_msg_buffer != NULL)
{
if (*p_msg_len < NLEN_FIELD_SIZE)
{
return NRF_ERROR_NO_MEM;
}
p_msg_buffer += NLEN_FIELD_SIZE;
}
sum_of_len += NLEN_FIELD_SIZE;
#endif
for (i = 0; i < p_ndef_msg_desc->record_count; i++)
{
record_location = record_location_get(i, p_ndef_msg_desc->record_count);
temp_len = *p_msg_len - sum_of_len;
err_code = nfc_ndef_record_encode(*pp_record_rec_desc,
record_location,
p_msg_buffer,
&temp_len);
if (err_code != NRF_SUCCESS)
{
return err_code;
}
sum_of_len += temp_len;
if (p_msg_buffer != NULL)
{
p_msg_buffer += temp_len;
}
/* next record */
pp_record_rec_desc++;
}
#if NFC_NDEF_MSG_TAG_TYPE == TYPE_4_TAG
if (p_msg_buffer != NULL)
{
if (sum_of_len - NLEN_FIELD_SIZE > UINT16_MAX)
{
return NRF_ERROR_NOT_SUPPORTED;
}
UNUSED_RETURN_VALUE(uint16_big_encode(sum_of_len - NLEN_FIELD_SIZE, p_root_msg_buffer));
}
#endif
*p_msg_len = sum_of_len;
return NRF_SUCCESS;
}
void nfc_ndef_msg_clear(nfc_ndef_msg_desc_t * p_msg)
{
p_msg->record_count = 0;
}
ret_code_t nfc_ndef_msg_record_add(nfc_ndef_msg_desc_t * const p_msg,
nfc_ndef_record_desc_t * const p_record)
{
if (p_msg->record_count >= p_msg->max_record_count)
{
return NRF_ERROR_NO_MEM;
}
p_msg->pp_record[p_msg->record_count] = p_record;
p_msg->record_count++;
return NRF_SUCCESS;
}
#endif // NFC_NDEF_MSG_ENABLED

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COMPONENTS/nfc/ndef/generic/message/nfc_ndef_msg.h Normal file
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/**
* Copyright (c) 2015 - 2017, Nordic Semiconductor ASA
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form, except as embedded into a Nordic
* Semiconductor ASA integrated circuit in a product or a software update for
* such product, must reproduce the above copyright notice, this list of
* conditions and the following disclaimer in the documentation and/or other
* materials provided with the distribution.
*
* 3. Neither the name of Nordic Semiconductor ASA nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* 4. This software, with or without modification, must only be used with a
* Nordic Semiconductor ASA integrated circuit.
*
* 5. Any software provided in binary form under this license must not be reverse
* engineered, decompiled, modified and/or disassembled.
*
* THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#ifndef NFC_NDEF_MSG_H__
#define NFC_NDEF_MSG_H__
#include "nfc_ndef_record.h"
#ifdef __cplusplus
extern "C" {
#endif
/**@file
*
* @defgroup nfc_ndef_msg Custom NDEF messages
* @{
* @ingroup nfc_modules
*
* @brief Generation of NFC NDEF messages for the NFC tag.
*
*/
/**
* @brief NDEF message descriptor.
*/
typedef struct {
nfc_ndef_record_desc_t ** pp_record; ///< Pointer to an array of pointers to NDEF record descriptors.
uint32_t max_record_count; ///< Number of elements in the allocated pp_record array, which defines the maximum number of records within the NDEF message.
uint32_t record_count; ///< Number of records in the NDEF message.
} nfc_ndef_msg_desc_t;
/**
* @brief Function for encoding an NDEF message.
*
* This function encodes an NDEF message according to the provided message descriptor.
*
* @note The way of encoding an NDEF message may vary depending on tag's platform, which
* can be chosen with @ref NFC_NDEF_MSG_TAG_TYPE in @c sdk_config.h.
*
* @param[in] p_ndef_msg_desc Pointer to the message descriptor.
* @param[out] p_msg_buffer Pointer to the message destination. If NULL, function will
* calculate the expected size of the message.
* @param[in,out] p_msg_len Size of the available memory for the message as input. Size of
* the generated message as output.
*
* @return Return value from @ref nfc_ndef_record_encode.
*/
ret_code_t nfc_ndef_msg_encode(nfc_ndef_msg_desc_t const * p_ndef_msg_desc,
uint8_t * p_msg_buffer,
uint32_t * const p_msg_len);
/**
* @brief Function for clearing an NDEF message.
*
* This function clears an NDEF message descriptor, thus empties the NDEF message.
*
* @param[in,out] p_msg Pointer to the message descriptor.
*/
void nfc_ndef_msg_clear( nfc_ndef_msg_desc_t * p_msg);
/**
* @brief Function for adding a record to an NDEF message.
*
* @param[in] p_record Pointer to the record descriptor.
* @param[in,out] p_msg Pointer to the message descriptor.
*
* @retval NRF_SUCCESS If the record was added successfully.
* @retval NRF_ERROR_NO_MEM If the message already contains the maximum number of records and the operation is not allowed.
*/
ret_code_t nfc_ndef_msg_record_add(nfc_ndef_msg_desc_t * const p_msg,
nfc_ndef_record_desc_t * const p_record);
/**@brief Macro for creating and initializing an NFC NDEF message descriptor.
*
* This macro creates and initializes a static instance of type @ref nfc_ndef_msg_desc_t
* and a static array of pointers to record descriptors (@ref nfc_ndef_record_desc_t) used
* by the message.
*
* Use the macro @ref NFC_NDEF_MSG to access the NDEF message descriptor instance.
*
* @param[in] NAME Name of the related instance.
* @param[in] MAX_RECORD_CNT Maximal count of records in the message.
*/
#define NFC_NDEF_MSG_DEF(NAME, MAX_RECORD_CNT) \
static nfc_ndef_record_desc_t * NAME##_nfc_ndef_p_record_desc_array[MAX_RECORD_CNT]; \
static nfc_ndef_msg_desc_t NAME##_nfc_ndef_msg_desc = \
{ \
.pp_record = NAME##_nfc_ndef_p_record_desc_array, \
.record_count = 0, \
.max_record_count = MAX_RECORD_CNT \
}
/** @brief Macro for accessing the NFC NDEF message descriptor instance
* that you created with @ref NFC_NDEF_MSG_DEF.
*/
#define NFC_NDEF_MSG(NAME) (NAME##_nfc_ndef_msg_desc)
/**
* @brief Macro for creating and initializing an NFC NDEF record descriptor with an encapsulated NDEF message.
* This macro creates and initializes a static instance of type
* @ref nfc_ndef_record_desc_t that contains an encapsulated NDEF message as
* payload. @ref nfc_ndef_msg_encode is used as payload constructor to encode
* the message. The encoded message is then used as payload for the record.
*
* Use the macro @ref NFC_NDEF_NESTED_NDEF_MSG_RECORD to access the NDEF record descriptor instance.
*
* @param[in] NAME Name of the created record descriptor instance.
* @param[in] TNF Type Name Format (TNF) value for the record.
* @param[in] P_ID Pointer to the ID string.
* @param[in] ID_LEN Length of the ID string.
* @param[in] P_TYPE Pointer to the type string.
* @param[in] TYPE_LEN Length of the type string.
* @param[in] P_NESTED_MESSAGE Pointer to the message descriptor to encapsulate
* as the record's payload.
*/
#define NFC_NDEF_NESTED_NDEF_MSG_RECORD_DEF( NAME, \
TNF, \
P_ID, \
ID_LEN, \
P_TYPE, \
TYPE_LEN, \
P_NESTED_MESSAGE ) \
static nfc_ndef_record_desc_t NAME##_ndef_record_nested_desc = \
{ \
.tnf = TNF, \
\
.id_length = ID_LEN, \
.p_id = P_ID, \
\
.type_length = TYPE_LEN, \
.p_type = P_TYPE, \
\
.payload_constructor = (p_payload_constructor_t)(nfc_ndef_msg_encode), \
.p_payload_descriptor = (void*) (P_NESTED_MESSAGE) \
}
/** @brief Macro for accessing the NFC NDEF record descriptor instance
* that you created with @ref NFC_NDEF_NESTED_NDEF_MSG_RECORD_DEF.
*/
#define NFC_NDEF_NESTED_NDEF_MSG_RECORD(NAME) (NAME##_ndef_record_nested_desc)
/**
* @}
*/
#ifdef __cplusplus
}
#endif
#endif