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Diffstat (limited to 'thirdparty/nRF5_SDK_15.0.0_a53641a/components/ble/common/ble_advdata.c')
| -rw-r--r-- | thirdparty/nRF5_SDK_15.0.0_a53641a/components/ble/common/ble_advdata.c | 827 |
1 files changed, 827 insertions, 0 deletions
diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/components/ble/common/ble_advdata.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/ble/common/ble_advdata.c new file mode 100644 index 0000000..894a5e9 --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/ble/common/ble_advdata.c @@ -0,0 +1,827 @@ +/** + * Copyright (c) 2012 - 2018, 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 "ble_advdata.h" +#include "ble_gap.h" +#include "ble_srv_common.h" +#include "sdk_common.h" + +// NOTE: For now, Security Manager Out of Band Flags (OOB) are omitted from the advertising data. + + +// Types of LE Bluetooth Device Address AD type +#define AD_TYPE_BLE_DEVICE_ADDR_TYPE_PUBLIC 0UL +#define AD_TYPE_BLE_DEVICE_ADDR_TYPE_RANDOM 1UL + +#define UUID16_SIZE 2 /**< Size of 16 bit UUID. */ +#define UUID32_SIZE 4 /**< Size of 32 bit UUID. */ +#define UUID128_SIZE 16 /**< Size of 128 bit UUID. */ + +#define N_AD_TYPES 2 /**< The number of Advertising data types to search for at a time. */ + + +static ret_code_t ble_device_addr_encode(uint8_t * p_encoded_data, + uint16_t * p_offset, + uint16_t max_size) +{ + ret_code_t err_code; + ble_gap_addr_t device_addr; + + // Check for buffer overflow. + if (((*p_offset) + AD_TYPE_BLE_DEVICE_ADDR_SIZE) > max_size) + { + return NRF_ERROR_DATA_SIZE; + } + + // Get BLE address. + err_code = sd_ble_gap_addr_get(&device_addr); + VERIFY_SUCCESS(err_code); + + // Encode LE Bluetooth Device Address. + p_encoded_data[*p_offset] = (uint8_t)(AD_TYPE_FIELD_SIZE + + AD_TYPE_BLE_DEVICE_ADDR_DATA_SIZE); + *p_offset += AD_LENGTH_FIELD_SIZE; + p_encoded_data[*p_offset] = BLE_GAP_AD_TYPE_LE_BLUETOOTH_DEVICE_ADDRESS; + *p_offset += AD_TYPE_FIELD_SIZE; + memcpy(&p_encoded_data[*p_offset], &device_addr.addr[0], BLE_GAP_ADDR_LEN); + *p_offset += BLE_GAP_ADDR_LEN; + if (BLE_GAP_ADDR_TYPE_PUBLIC == device_addr.addr_type) + { + p_encoded_data[*p_offset] = AD_TYPE_BLE_DEVICE_ADDR_TYPE_PUBLIC; + } + else + { + p_encoded_data[*p_offset] = AD_TYPE_BLE_DEVICE_ADDR_TYPE_RANDOM; + } + *p_offset += AD_TYPE_BLE_DEVICE_ADDR_TYPE_SIZE; + + return NRF_SUCCESS; +} + +static ret_code_t name_encode(const ble_advdata_t * p_advdata, + uint8_t * p_encoded_data, + uint16_t * p_offset, + uint16_t max_size) +{ + ret_code_t err_code; + uint16_t rem_adv_data_len; + uint16_t actual_length; + uint8_t adv_data_format; + + + // Validate parameters + if ((BLE_ADVDATA_SHORT_NAME == p_advdata->name_type) && (0 == p_advdata->short_name_len)) + { + return NRF_ERROR_INVALID_PARAM; + } + + // Check for buffer overflow. + if ( (((*p_offset) + AD_DATA_OFFSET) > max_size) || + ( (BLE_ADVDATA_SHORT_NAME == p_advdata->name_type) && + (((*p_offset) + AD_DATA_OFFSET + p_advdata->short_name_len) > max_size))) + { + return NRF_ERROR_DATA_SIZE; + } + + rem_adv_data_len = max_size - (*p_offset) - AD_DATA_OFFSET; + actual_length = rem_adv_data_len; + + // Get GAP device name and length + err_code = sd_ble_gap_device_name_get(&p_encoded_data[(*p_offset) + AD_DATA_OFFSET], + &actual_length); + VERIFY_SUCCESS(err_code); + + // Check if device intend to use short name and it can fit available data size. + if ((p_advdata->name_type == BLE_ADVDATA_FULL_NAME) && (actual_length <= rem_adv_data_len)) + { + // Complete device name can fit, setting Complete Name in Adv Data. + adv_data_format = BLE_GAP_AD_TYPE_COMPLETE_LOCAL_NAME; + } + else + { + // Else short name needs to be used. Or application has requested use of short name. + adv_data_format = BLE_GAP_AD_TYPE_SHORT_LOCAL_NAME; + + // If application has set a preference on the short name size, it needs to be considered, + // else fit what can be fit. + if ((BLE_ADVDATA_SHORT_NAME == p_advdata->name_type) && + (p_advdata->short_name_len <= rem_adv_data_len)) + { + // Short name fits available size. + actual_length = p_advdata->short_name_len; + } + // Else whatever can fit the data buffer will be packed. + else + { + actual_length = rem_adv_data_len; + } + } + + // There is only 1 byte intended to encode length which is (actual_length + AD_TYPE_FIELD_SIZE) + if (actual_length > (0x00FF - AD_TYPE_FIELD_SIZE)) + { + return NRF_ERROR_DATA_SIZE; + } + + // Complete name field in encoded data. + p_encoded_data[*p_offset] = (uint8_t)(AD_TYPE_FIELD_SIZE + actual_length); + *p_offset += AD_LENGTH_FIELD_SIZE; + p_encoded_data[*p_offset] = adv_data_format; + *p_offset += AD_TYPE_FIELD_SIZE; + *p_offset += actual_length; + + return NRF_SUCCESS; +} + + +static ret_code_t appearance_encode(uint8_t * p_encoded_data, + uint16_t * p_offset, + uint16_t max_size) +{ + ret_code_t err_code; + uint16_t appearance; + + // Check for buffer overflow. + if (((*p_offset) + AD_TYPE_APPEARANCE_SIZE) > max_size) + { + return NRF_ERROR_DATA_SIZE; + } + + // Get GAP appearance field. + err_code = sd_ble_gap_appearance_get(&appearance); + VERIFY_SUCCESS(err_code); + + // Encode Length, AD Type and Appearance. + p_encoded_data[*p_offset] = (uint8_t)(AD_TYPE_FIELD_SIZE + AD_TYPE_APPEARANCE_DATA_SIZE); + *p_offset += AD_LENGTH_FIELD_SIZE; + p_encoded_data[*p_offset] = BLE_GAP_AD_TYPE_APPEARANCE; + *p_offset += AD_TYPE_FIELD_SIZE; + *p_offset += uint16_encode(appearance, &p_encoded_data[*p_offset]); + + return NRF_SUCCESS; +} + +static ret_code_t flags_encode(int8_t flags, + uint8_t * p_encoded_data, + uint16_t * p_offset, + uint16_t max_size) +{ + // Check for buffer overflow. + if (((*p_offset) + AD_TYPE_FLAGS_SIZE) > max_size) + { + return NRF_ERROR_DATA_SIZE; + } + + // Encode flags. + p_encoded_data[*p_offset] = (uint8_t)(AD_TYPE_FIELD_SIZE + AD_TYPE_FLAGS_DATA_SIZE); + *p_offset += AD_LENGTH_FIELD_SIZE; + p_encoded_data[*p_offset] = BLE_GAP_AD_TYPE_FLAGS; + *p_offset += AD_TYPE_FIELD_SIZE; + p_encoded_data[*p_offset] = flags; + *p_offset += AD_TYPE_FLAGS_DATA_SIZE; + + return NRF_SUCCESS; +} + +static ret_code_t tx_power_level_encode(int8_t tx_power_level, + uint8_t * p_encoded_data, + uint16_t * p_offset, + uint16_t max_size) +{ + // Check for buffer overflow. + if (((*p_offset) + AD_TYPE_TX_POWER_LEVEL_SIZE) > max_size) + { + return NRF_ERROR_DATA_SIZE; + } + + // Encode TX Power Level. + p_encoded_data[*p_offset] = (uint8_t)(AD_TYPE_FIELD_SIZE + + AD_TYPE_TX_POWER_LEVEL_DATA_SIZE); + *p_offset += AD_LENGTH_FIELD_SIZE; + p_encoded_data[*p_offset] = BLE_GAP_AD_TYPE_TX_POWER_LEVEL; + *p_offset += AD_TYPE_FIELD_SIZE; + p_encoded_data[*p_offset] = tx_power_level; + *p_offset += AD_TYPE_TX_POWER_LEVEL_DATA_SIZE; + + return NRF_SUCCESS; +} + + +static ret_code_t uuid_list_sized_encode(const ble_advdata_uuid_list_t * p_uuid_list, + uint8_t adv_type, + uint8_t uuid_size, + uint8_t * p_encoded_data, + uint16_t * p_offset, + uint16_t max_size) +{ + int i; + bool is_heading_written = false; + uint16_t start_pos = *p_offset; + uint16_t length; + + for (i = 0; i < p_uuid_list->uuid_cnt; i++) + { + ret_code_t err_code; + uint8_t encoded_size; + ble_uuid_t uuid = p_uuid_list->p_uuids[i]; + + // Find encoded uuid size. + err_code = sd_ble_uuid_encode(&uuid, &encoded_size, NULL); + VERIFY_SUCCESS(err_code); + + // Check size. + if (encoded_size == uuid_size) + { + uint8_t heading_bytes = (is_heading_written) ? 0 : AD_DATA_OFFSET; + + // Check for buffer overflow + if (((*p_offset) + encoded_size + heading_bytes) > max_size) + { + return NRF_ERROR_DATA_SIZE; + } + + if (!is_heading_written) + { + // Write AD structure heading. + *p_offset += AD_LENGTH_FIELD_SIZE; + p_encoded_data[*p_offset] = adv_type; + *p_offset += AD_TYPE_FIELD_SIZE; + is_heading_written = true; + } + + // Write UUID. + err_code = sd_ble_uuid_encode(&uuid, &encoded_size, &p_encoded_data[*p_offset]); + VERIFY_SUCCESS(err_code); + *p_offset += encoded_size; + } + } + + if (is_heading_written) + { + // Write length. + length = (*p_offset) - (start_pos + AD_LENGTH_FIELD_SIZE); + // There is only 1 byte intended to encode length + if (length > 0x00FF) + { + return NRF_ERROR_DATA_SIZE; + } + p_encoded_data[start_pos] = (uint8_t)length; + } + + return NRF_SUCCESS; +} + + +static ret_code_t uuid_list_encode(const ble_advdata_uuid_list_t * p_uuid_list, + uint8_t adv_type_16, + uint8_t adv_type_128, + uint8_t * p_encoded_data, + uint16_t * p_offset, + uint16_t max_size) +{ + ret_code_t err_code; + + // Encode 16 bit UUIDs. + err_code = uuid_list_sized_encode(p_uuid_list, + adv_type_16, + sizeof(uint16_le_t), + p_encoded_data, + p_offset, + max_size); + VERIFY_SUCCESS(err_code); + + // Encode 128 bit UUIDs. + err_code = uuid_list_sized_encode(p_uuid_list, + adv_type_128, + sizeof(ble_uuid128_t), + p_encoded_data, + p_offset, + max_size); + VERIFY_SUCCESS(err_code); + + return NRF_SUCCESS; +} + + +static ret_code_t conn_int_check(const ble_advdata_conn_int_t *p_conn_int) +{ + // Check Minimum Connection Interval. + if ((p_conn_int->min_conn_interval < 0x0006) || + ( + (p_conn_int->min_conn_interval > 0x0c80) && + (p_conn_int->min_conn_interval != 0xffff) + ) + ) + { + return NRF_ERROR_INVALID_PARAM; + } + + // Check Maximum Connection Interval. + if ((p_conn_int->max_conn_interval < 0x0006) || + ( + (p_conn_int->max_conn_interval > 0x0c80) && + (p_conn_int->max_conn_interval != 0xffff) + ) + ) + { + return NRF_ERROR_INVALID_PARAM; + } + + // Make sure Minimum Connection Interval is not bigger than Maximum Connection Interval. + if ((p_conn_int->min_conn_interval != 0xffff) && + (p_conn_int->max_conn_interval != 0xffff) && + (p_conn_int->min_conn_interval > p_conn_int->max_conn_interval) + ) + { + return NRF_ERROR_INVALID_PARAM; + } + + return NRF_SUCCESS; +} + + +static ret_code_t conn_int_encode(const ble_advdata_conn_int_t * p_conn_int, + uint8_t * p_encoded_data, + uint16_t * p_offset, + uint16_t max_size) +{ + ret_code_t err_code; + + // Check for buffer overflow. + if (((*p_offset) + AD_TYPE_CONN_INT_SIZE) > max_size) + { + return NRF_ERROR_DATA_SIZE; + } + + // Check parameters. + err_code = conn_int_check(p_conn_int); + VERIFY_SUCCESS(err_code); + + // Encode Length and AD Type. + p_encoded_data[*p_offset] = (uint8_t)(AD_TYPE_FIELD_SIZE + AD_TYPE_CONN_INT_DATA_SIZE); + *p_offset += AD_LENGTH_FIELD_SIZE; + p_encoded_data[*p_offset] = BLE_GAP_AD_TYPE_SLAVE_CONNECTION_INTERVAL_RANGE; + *p_offset += AD_TYPE_FIELD_SIZE; + + // Encode Minimum and Maximum Connection Intervals. + *p_offset += uint16_encode(p_conn_int->min_conn_interval, &p_encoded_data[*p_offset]); + *p_offset += uint16_encode(p_conn_int->max_conn_interval, &p_encoded_data[*p_offset]); + + return NRF_SUCCESS; +} + + +static ret_code_t manuf_specific_data_encode(const ble_advdata_manuf_data_t * p_manuf_sp_data, + uint8_t * p_encoded_data, + uint16_t * p_offset, + uint16_t max_size) +{ + uint32_t data_size = AD_TYPE_MANUF_SPEC_DATA_ID_SIZE + p_manuf_sp_data->data.size; + + // Check for buffer overflow. + if (((*p_offset) + AD_DATA_OFFSET + data_size) > max_size) + { + return NRF_ERROR_DATA_SIZE; + } + + // There is only 1 byte intended to encode length which is (data_size + AD_TYPE_FIELD_SIZE) + if (data_size > (0x00FF - AD_TYPE_FIELD_SIZE)) + { + return NRF_ERROR_DATA_SIZE; + } + + // Encode Length and AD Type. + p_encoded_data[*p_offset] = (uint8_t)(AD_TYPE_FIELD_SIZE + data_size); + *p_offset += AD_LENGTH_FIELD_SIZE; + p_encoded_data[*p_offset] = BLE_GAP_AD_TYPE_MANUFACTURER_SPECIFIC_DATA; + *p_offset += AD_TYPE_FIELD_SIZE; + + // Encode Company Identifier. + *p_offset += uint16_encode(p_manuf_sp_data->company_identifier, &p_encoded_data[*p_offset]); + + // Encode additional manufacturer specific data. + if (p_manuf_sp_data->data.size > 0) + { + if (p_manuf_sp_data->data.p_data == NULL) + { + return NRF_ERROR_INVALID_PARAM; + } + memcpy(&p_encoded_data[*p_offset], p_manuf_sp_data->data.p_data, p_manuf_sp_data->data.size); + *p_offset += p_manuf_sp_data->data.size; + } + + return NRF_SUCCESS; +} + +// Implemented only for 16-bit UUIDs +static ret_code_t service_data_encode(const ble_advdata_t * p_advdata, + uint8_t * p_encoded_data, + uint16_t * p_offset, + uint16_t max_size) +{ + uint8_t i; + + // Check parameter consistency. + if (p_advdata->p_service_data_array == NULL) + { + return NRF_ERROR_INVALID_PARAM; + } + + for (i = 0; i < p_advdata->service_data_count; i++) + { + ble_advdata_service_data_t * p_service_data; + uint32_t data_size; + + p_service_data = &p_advdata->p_service_data_array[i]; + // For now implemented only for 16-bit UUIDs + data_size = AD_TYPE_SERV_DATA_16BIT_UUID_SIZE + p_service_data->data.size; + + // There is only 1 byte intended to encode length which is (data_size + AD_TYPE_FIELD_SIZE) + if (data_size > (0x00FF - AD_TYPE_FIELD_SIZE)) + { + return NRF_ERROR_DATA_SIZE; + } + + // Encode Length and AD Type. + p_encoded_data[*p_offset] = (uint8_t)(AD_TYPE_FIELD_SIZE + data_size); + *p_offset += AD_LENGTH_FIELD_SIZE; + p_encoded_data[*p_offset] = BLE_GAP_AD_TYPE_SERVICE_DATA; + *p_offset += AD_TYPE_FIELD_SIZE; + + // Encode service 16-bit UUID. + *p_offset += uint16_encode(p_service_data->service_uuid, &p_encoded_data[*p_offset]); + + // Encode additional service data. + if (p_service_data->data.size > 0) + { + if (p_service_data->data.p_data == NULL) + { + return NRF_ERROR_INVALID_PARAM; + } + memcpy(&p_encoded_data[*p_offset], p_service_data->data.p_data, p_service_data->data.size); + *p_offset += p_service_data->data.size; + } + } + + return NRF_SUCCESS; +} + +ret_code_t ble_advdata_encode(ble_advdata_t const * const p_advdata, + uint8_t * const p_encoded_data, + uint16_t * const p_len) +{ + ret_code_t err_code = NRF_SUCCESS; + uint16_t max_size = *p_len; + *p_len = 0; + + // Encode LE Bluetooth Device Address + if (p_advdata->include_ble_device_addr) + { + err_code = ble_device_addr_encode(p_encoded_data, p_len, max_size); + VERIFY_SUCCESS(err_code); + } + + // Encode appearance. + if (p_advdata->include_appearance) + { + err_code = appearance_encode(p_encoded_data, p_len, max_size); + VERIFY_SUCCESS(err_code); + } + + //Encode Flags + if (p_advdata->flags != 0 ) + { + err_code = flags_encode(p_advdata->flags, p_encoded_data, p_len, max_size); + VERIFY_SUCCESS(err_code); + } + + // Encode TX power level. + if (p_advdata->p_tx_power_level != NULL) + { + err_code = tx_power_level_encode(*p_advdata->p_tx_power_level, + p_encoded_data, + p_len, + max_size); + VERIFY_SUCCESS(err_code); + } + + // Encode 'more available' uuid list. + if (p_advdata->uuids_more_available.uuid_cnt > 0) + { + err_code = uuid_list_encode(&p_advdata->uuids_more_available, + BLE_GAP_AD_TYPE_16BIT_SERVICE_UUID_MORE_AVAILABLE, + BLE_GAP_AD_TYPE_128BIT_SERVICE_UUID_MORE_AVAILABLE, + p_encoded_data, + p_len, + max_size); + VERIFY_SUCCESS(err_code); + } + + // Encode 'complete' uuid list. + if (p_advdata->uuids_complete.uuid_cnt > 0) + { + err_code = uuid_list_encode(&p_advdata->uuids_complete, + BLE_GAP_AD_TYPE_16BIT_SERVICE_UUID_COMPLETE, + BLE_GAP_AD_TYPE_128BIT_SERVICE_UUID_COMPLETE, + p_encoded_data, + p_len, + max_size); + VERIFY_SUCCESS(err_code); + } + + // Encode 'solicited service' uuid list. + if (p_advdata->uuids_solicited.uuid_cnt > 0) + { + err_code = uuid_list_encode(&p_advdata->uuids_solicited, + BLE_GAP_AD_TYPE_SOLICITED_SERVICE_UUIDS_16BIT, + BLE_GAP_AD_TYPE_SOLICITED_SERVICE_UUIDS_128BIT, + p_encoded_data, + p_len, + max_size); + VERIFY_SUCCESS(err_code); + } + + // Encode Slave Connection Interval Range. + if (p_advdata->p_slave_conn_int != NULL) + { + err_code = conn_int_encode(p_advdata->p_slave_conn_int, p_encoded_data, p_len, max_size); + VERIFY_SUCCESS(err_code); + } + + // Encode Manufacturer Specific Data. + if (p_advdata->p_manuf_specific_data != NULL) + { + err_code = manuf_specific_data_encode(p_advdata->p_manuf_specific_data, + p_encoded_data, + p_len, + max_size); + VERIFY_SUCCESS(err_code); + } + + // Encode Service Data. + if (p_advdata->service_data_count > 0) + { + err_code = service_data_encode(p_advdata, p_encoded_data, p_len, max_size); + VERIFY_SUCCESS(err_code); + } + + // Encode name. WARNING: it is encoded last on purpose since too long device name is truncated. + if (p_advdata->name_type != BLE_ADVDATA_NO_NAME) + { + err_code = name_encode(p_advdata, p_encoded_data, p_len, max_size); + VERIFY_SUCCESS(err_code); + } + + return err_code; +} + + +uint16_t ble_advdata_search(uint8_t const * p_encoded_data, + uint16_t data_len, + uint16_t * p_offset, + uint8_t ad_type) +{ + if ((p_encoded_data == NULL) || (p_offset == NULL)) + { + return 0; + } + + uint16_t i = 0; + + while (((i < *p_offset) || (p_encoded_data[i + 1] != ad_type)) && (i < data_len)) + { + // Jump to next data. + i += (p_encoded_data[i] + 1); + } + + if (i >= data_len) + { + return 0; + } + else + { + *p_offset = i + 2; + return (p_encoded_data[i] - 1); + } +} + + +uint8_t * ble_advdata_parse(uint8_t * p_encoded_data, + uint16_t data_len, + uint8_t ad_type) +{ + uint16_t offset = 0; + uint16_t len = ble_advdata_search(p_encoded_data, data_len, &offset, ad_type); + + if (len == 0) + { + return NULL; + } + else + { + return &p_encoded_data[offset]; + } +} + + +bool ble_advdata_name_find(uint8_t const * p_encoded_data, + uint16_t data_len, + char const * p_target_name) +{ + uint16_t parsed_name_len; + uint8_t const * p_parsed_name; + uint16_t data_offset = 0; + + if (p_target_name == NULL) + { + return false; + } + + + parsed_name_len = ble_advdata_search(p_encoded_data, + data_len, + &data_offset, + BLE_GAP_AD_TYPE_COMPLETE_LOCAL_NAME); + + p_parsed_name = &p_encoded_data[data_offset]; + + if ( (data_offset != 0) + && (parsed_name_len != 0) + && (strlen(p_target_name) == parsed_name_len) + && (memcmp(p_target_name, p_parsed_name, parsed_name_len) == 0)) + { + return true; + } + + return false; +} + + +bool ble_advdata_short_name_find(uint8_t const * p_encoded_data, + uint16_t data_len, + char const * p_target_name, + uint8_t const short_name_min_len) +{ + uint16_t parsed_name_len; + uint8_t const * p_parsed_name; + uint16_t data_offset = 0; + + if (p_target_name == NULL) + { + return false; + } + + parsed_name_len = ble_advdata_search(p_encoded_data, + data_len, + &data_offset, + BLE_GAP_AD_TYPE_SHORT_LOCAL_NAME); + + p_parsed_name = &p_encoded_data[data_offset]; + + if ( (data_offset != 0) + && (parsed_name_len != 0) + && (parsed_name_len >= short_name_min_len) + && (parsed_name_len < strlen(p_target_name)) + && (memcmp(p_target_name, p_parsed_name, parsed_name_len) == 0)) + { + return true; + } + + return false; +} + + +bool ble_advdata_uuid_find(uint8_t const * p_encoded_data, + uint16_t data_len, + ble_uuid_t const * p_target_uuid) +{ + + ret_code_t err_code; + uint16_t data_offset = 0; + uint8_t raw_uuid_len = UUID128_SIZE; + uint8_t const * p_parsed_uuid; + uint16_t parsed_uuid_len = data_len; + uint8_t raw_uuid[UUID128_SIZE]; + uint8_t ad_types[N_AD_TYPES]; + + err_code = sd_ble_uuid_encode(p_target_uuid, &raw_uuid_len, raw_uuid); + + if ((p_encoded_data == NULL) || (err_code != NRF_SUCCESS)) + { + // Invalid p_encoded_data or p_target_uuid. + return false; + } + + switch (raw_uuid_len) + { + case UUID16_SIZE: + ad_types[0] = BLE_GAP_AD_TYPE_16BIT_SERVICE_UUID_COMPLETE; + ad_types[1] = BLE_GAP_AD_TYPE_16BIT_SERVICE_UUID_MORE_AVAILABLE; + break; + + case UUID32_SIZE: + // Not currently supported by sd_ble_uuid_encode(). + ad_types[0] = BLE_GAP_AD_TYPE_32BIT_SERVICE_UUID_COMPLETE; + ad_types[1] = BLE_GAP_AD_TYPE_32BIT_SERVICE_UUID_MORE_AVAILABLE; + break; + + case UUID128_SIZE: + ad_types[0] = BLE_GAP_AD_TYPE_128BIT_SERVICE_UUID_COMPLETE; + ad_types[1] = BLE_GAP_AD_TYPE_128BIT_SERVICE_UUID_MORE_AVAILABLE; + break; + + default: + return false; + } + + for (uint8_t i = 0; (i < N_AD_TYPES) && (data_offset == 0); i++) + { + parsed_uuid_len = ble_advdata_search(p_encoded_data, data_len, &data_offset, ad_types[i]); + } + + if (data_offset == 0) + { + // Could not find any relevant UUIDs in the encoded data. + return false; + } + + p_parsed_uuid = &p_encoded_data[data_offset]; + + // Verify if any UUID matches the given UUID. + for (uint16_t list_offset = 0; list_offset < parsed_uuid_len; list_offset += raw_uuid_len) + { + if (memcmp(&p_parsed_uuid[list_offset], raw_uuid, raw_uuid_len) == 0) + { + return true; + } + } + + // Could not find the UUID among the encoded data. + return false; +} + + +bool ble_advdata_appearance_find(uint8_t const * p_encoded_data, + uint16_t data_len, + uint16_t const * p_target_appearance) +{ + uint16_t data_offset = 0; + uint8_t appearance_len; + uint16_t decoded_appearance; + + appearance_len = ble_advdata_search(p_encoded_data, data_len, &data_offset, BLE_GAP_AD_TYPE_APPEARANCE); + + if ( (data_offset == 0) + || (p_target_appearance == NULL) + || (appearance_len == 0)) + { + // Could not find any Appearance in the encoded data, or invalid p_target_appearance. + return false; + } + + decoded_appearance = uint16_decode(&p_encoded_data[data_offset]); + + if (decoded_appearance == *p_target_appearance) + { + return true; + } + + // Could not find the appearance among the encoded data. + return false; +} |