nfc_launchapp_rec.c

/**
 * 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:
 * 
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 *    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
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 *    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.
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 * 4. This software, with or without modification, must only be used with a
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 * 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
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 */
#include <string.h>
#include "nrf_error.h"
#include "app_util.h"
#include "nfc_ndef_record.h"

/**
 * @brief Type of description of payload of Windows LaunchApp record.
 */
typedef struct
{
    const uint8_t * platform;
    uint8_t         platform_length;
    const uint8_t * app_id;
    uint8_t         app_id_length;
} win_launchapp_payload_desc_t;

/** @brief Description of payload of Windows LaunchApp record. */
static win_launchapp_payload_desc_t m_win_launchapp_dsc;

static const uint8_t launchapp_type_str[] = {'a', 'n', 'd', 'r', 'o', 'i', 'd', '.', 'c', 'o', 'm',
                                             ':', 'p', 'k', 'g'};

static const uint8_t win_launchapp_type_str[] = {'w', 'i', 'n', 'd', 'o', 'w', 's', '.', 'c', 'o',
                                                 'm', '/', 'L', 'a', 'u', 'n', 'c', 'h', 'A', 'p',
                                                 'p'};

static const uint8_t win_phone_str[] = {'W', 'i', 'n', 'd', 'o', 'w', 's', 'P', 'h', 'o', 'n', 'e'};

nfc_ndef_record_desc_t * nfc_android_application_rec_declare(uint8_t const * p_package_name,
                                                             uint8_t         package_name_length)
{
    NFC_NDEF_RECORD_BIN_DATA_DEF(android_app_rec,
                                 TNF_EXTERNAL_TYPE,    // tnf <- external
                                 NULL, // no id
                                 0,    // no id
                                 launchapp_type_str,
                                 sizeof(launchapp_type_str),
                                 NULL,
                                 0);

    NFC_NDEF_BIN_PAYLOAD_DESC(android_app_rec).p_payload      = p_package_name;
    NFC_NDEF_BIN_PAYLOAD_DESC(android_app_rec).payload_length = package_name_length;

    return &NFC_NDEF_RECORD_BIN_DATA(android_app_rec);
}

#define WIN_LAUNCHAPP_EMPTY_PARAMETER 0x20 ///< The empty parameter value for the Windows LaunchApp Record.

/**
 * @brief Function for constructing the payload for a Windows LaunchApp record.
 *
 * This function encodes the payload according to the LaunchApp record definition. It implements an API
 * compatible with p_payload_constructor_t.
 *
 * @param[in] p_input    Pointer to the description of the payload.
 * @param[out] p_buff    Pointer to payload destination. If NULL, function will
 *                       calculate the expected size of the LaunchApp record payload.
 *
 * @param[in,out] p_len  Size of available memory to write as input. Size of generated
 *                       payload as output.
 *
 * @retval NRF_SUCCESS    Always success.
 */
static ret_code_t nfc_win_launchapp_payload_constructor(win_launchapp_payload_desc_t * p_input,
                                                        uint8_t                      * p_buff,
                                                        uint32_t                     * p_len)
{

    win_launchapp_payload_desc_t * launch_desc = (win_launchapp_payload_desc_t *) p_input;

    uint32_t temp_len = (uint32_t)launch_desc->platform_length + launch_desc->app_id_length + 7;

    if (p_buff != NULL)
    {
        if (temp_len > *p_len)
        {
            return NRF_ERROR_NO_MEM;
        }

        *p_buff++ = 0x00; // platform count: 1
        *p_buff++ = 0x01; // -||-

        *p_buff++ = launch_desc->platform_length;
        memcpy(p_buff, launch_desc->platform, launch_desc->platform_length); // platform
        p_buff += launch_desc->platform_length;


        *p_buff++ = launch_desc->app_id_length;
        memcpy(p_buff, launch_desc->app_id, launch_desc->app_id_length);
        p_buff += launch_desc->app_id_length;

        *p_buff++ = 0x00; // parameters length 1B
        *p_buff++ = 0x01; // -||-
        *p_buff++ = WIN_LAUNCHAPP_EMPTY_PARAMETER; // empty parameter
    }

    *p_len = temp_len;

    return NRF_SUCCESS;
}


nfc_ndef_record_desc_t * nfc_windows_launchapp_rec_declare(const uint8_t * p_win_app_id,
                                                           uint8_t         win_app_id_length)
{

    NFC_NDEF_GENERIC_RECORD_DESC_DEF(win_launchapp,
                                     TNF_ABSOLUTE_URI,
                                     NULL,
                                     0,
                                     win_launchapp_type_str,
                                     sizeof(win_launchapp_type_str),
                                     nfc_win_launchapp_payload_constructor,
                                     &m_win_launchapp_dsc);

    m_win_launchapp_dsc.platform        = win_phone_str;
    m_win_launchapp_dsc.platform_length = sizeof(win_phone_str);

    m_win_launchapp_dsc.app_id        = p_win_app_id;
    m_win_launchapp_dsc.app_id_length = win_app_id_length;

    return &NFC_NDEF_GENERIC_RECORD_DESC(win_launchapp);
}