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Bluetooth Low Energy
Diff: ble/GapAdvertisingData.h
- Revision:
- 969:61f13bc8edbf
- Parent:
- 966:9451b90bbb66
- Child:
- 970:b3e45745026d
diff -r 9b6005880241 -r 61f13bc8edbf ble/GapAdvertisingData.h
--- a/ble/GapAdvertisingData.h Thu Nov 26 12:52:35 2015 +0000
+++ b/ble/GapAdvertisingData.h Thu Nov 26 12:52:35 2015 +0000
@@ -89,23 +89,22 @@
*/
/**********************************************************************/
enum DataType_t {
- FLAGS = 0x01, /**< \ref *Flags */
- INCOMPLETE_LIST_16BIT_SERVICE_IDS = 0x02, /**< Incomplete list of 16-bit Service IDs */
- COMPLETE_LIST_16BIT_SERVICE_IDS = 0x03, /**< Complete list of 16-bit Service IDs */
- INCOMPLETE_LIST_32BIT_SERVICE_IDS = 0x04, /**< Incomplete list of 32-bit Service IDs (not relevant for Bluetooth 4.0) */
- COMPLETE_LIST_32BIT_SERVICE_IDS = 0x05, /**< Complete list of 32-bit Service IDs (not relevant for Bluetooth 4.0) */
- INCOMPLETE_LIST_128BIT_SERVICE_IDS = 0x06, /**< Incomplete list of 128-bit Service IDs */
- COMPLETE_LIST_128BIT_SERVICE_IDS = 0x07, /**< Complete list of 128-bit Service IDs */
- SHORTENED_LOCAL_NAME = 0x08, /**< Shortened Local Name */
- COMPLETE_LOCAL_NAME = 0x09, /**< Complete Local Name */
- TX_POWER_LEVEL = 0x0A, /**< TX Power Level (in dBm) */
- DEVICE_ID = 0x10, /**< Device ID */
- SLAVE_CONNECTION_INTERVAL_RANGE = 0x12, /**< Slave Connection Interval Range */
- LIST_128BIT_SOLICITATION_IDS = 0x15, /**< List of 128 bit service UUIDs the device is looking for */
- SERVICE_DATA = 0x16, /**< Service Data */
- APPEARANCE = 0x19, /**< \ref Appearance */
- ADVERTISING_INTERVAL = 0x1A, /**< Advertising Interval */
- MANUFACTURER_SPECIFIC_DATA = 0xFF /**< Manufacturer Specific Data */
+ FLAGS = 0x01, /**< \ref *Flags. */
+ INCOMPLETE_LIST_16BIT_SERVICE_IDS = 0x02, /**< Incomplete list of 16-bit service IDs. */
+ COMPLETE_LIST_16BIT_SERVICE_IDS = 0x03, /**< Complete list of 16-bit service IDs. */
+ INCOMPLETE_LIST_32BIT_SERVICE_IDS = 0x04, /**< Incomplete list of 32-bit service IDs (not relevant for Bluetooth 4.0). */
+ COMPLETE_LIST_32BIT_SERVICE_IDS = 0x05, /**< Complete list of 32-bit service IDs (not relevant for Bluetooth 4.0). */
+ INCOMPLETE_LIST_128BIT_SERVICE_IDS = 0x06, /**< Incomplete list of 128-bit service IDs. */
+ COMPLETE_LIST_128BIT_SERVICE_IDS = 0x07, /**< Complete list of 128-bit service IDs. */
+ SHORTENED_LOCAL_NAME = 0x08, /**< Shortened local name. */
+ COMPLETE_LOCAL_NAME = 0x09, /**< Complete local name. */
+ TX_POWER_LEVEL = 0x0A, /**< TX power level (in dBm). */
+ DEVICE_ID = 0x10, /**< Device ID. */
+ SLAVE_CONNECTION_INTERVAL_RANGE = 0x12, /**< Slave connection interval range. */
+ SERVICE_DATA = 0x16, /**< Service data. */
+ APPEARANCE = 0x19, /**< \ref Appearance. */
+ ADVERTISING_INTERVAL = 0x1A, /**< Advertising interval. */
+ MANUFACTURER_SPECIFIC_DATA = 0xFF /**< Manufacturer specific data. */
};
typedef enum DataType_t DataType; /* Deprecated type alias. This may be dropped in a future release. */
@@ -211,98 +210,27 @@
*/
ble_error_t addData(DataType advDataType, const uint8_t *payload, uint8_t len)
{
- ble_error_t result = BLE_ERROR_BUFFER_OVERFLOW;
-
- // find field
- uint8_t* field = findField(advDataType);
-
- // Field type already exist, either add to field or replace
- if (field) {
- switch(advDataType) {
- // These fields will be overwritten with the new value
- case FLAGS:
- case SHORTENED_LOCAL_NAME:
- case COMPLETE_LOCAL_NAME:
- case TX_POWER_LEVEL:
- case DEVICE_ID:
- case SLAVE_CONNECTION_INTERVAL_RANGE:
- case SERVICE_DATA:
- case APPEARANCE:
- case ADVERTISING_INTERVAL:
- case MANUFACTURER_SPECIFIC_DATA: {
- // current field length, with the type subtracted
- uint8_t dataLength = field[0] - 1;
-
- // new data has same length, do in-order replacement
- if (len == dataLength) {
- for (uint8_t idx = 0; idx < dataLength; idx++) {
- field[2 + idx] = payload[idx];
- }
- } else {
- // check if data fits
- if ((_payloadLen - dataLength + len) <= GAP_ADVERTISING_DATA_MAX_PAYLOAD) {
-
- // remove old field
- while ((field + dataLength + 2) < &_payload[_payloadLen]) {
- *field = field[dataLength + 2];
- field++;
- }
-
- // reduce length
- _payloadLen -= dataLength + 2;
-
- // add new field
- result = appendField(advDataType, payload, len);
- }
- }
+ /* To Do: Check if an AD type already exists and if the existing */
+ /* value is exclusive or not (flags and so on). */
- break;
- }
- // These fields will have the new data appended if there is sufficient space
- case INCOMPLETE_LIST_16BIT_SERVICE_IDS:
- case COMPLETE_LIST_16BIT_SERVICE_IDS:
- case INCOMPLETE_LIST_32BIT_SERVICE_IDS:
- case COMPLETE_LIST_32BIT_SERVICE_IDS:
- case INCOMPLETE_LIST_128BIT_SERVICE_IDS:
- case COMPLETE_LIST_128BIT_SERVICE_IDS:
- case LIST_128BIT_SOLICITATION_IDS: {
- // check if data fits
- if ((_payloadLen + len) <= GAP_ADVERTISING_DATA_MAX_PAYLOAD) {
- // make room for new field by moving the remainder of the
- // advertisement payload "to the right" starting after the
- // TYPE field.
- uint8_t* end = &_payload[_payloadLen];
-
- while (&field[1] < end) {
- end[len] = *end;
- end--;
- }
-
- // insert new data
- for (uint8_t idx = 0; idx < len; idx++) {
- field[2 + idx] = payload[idx];
- }
-
- // increment lengths
- field[0] += len;
- _payloadLen += len;
-
- result = BLE_ERROR_NONE;
- }
-
- break;
- }
- // Field exists but updating it is not supported. Abort operation.
- default:
- result = BLE_ERROR_NOT_IMPLEMENTED;
- break;
- }
- } else {
- // field doesn't exists, insert new
- result = appendField(advDataType, payload, len);
+ /* Make sure we don't exceed the 31 byte payload limit. */
+ if (_payloadLen + len + 2 > GAP_ADVERTISING_DATA_MAX_PAYLOAD) {
+ return BLE_ERROR_BUFFER_OVERFLOW;
}
- return result;
+ /* Field length. */
+ memset(&_payload[_payloadLen], len + 1, 1);
+ _payloadLen++;
+
+ /* Field ID. */
+ memset(&_payload[_payloadLen], (uint8_t)advDataType, 1);
+ _payloadLen++;
+
+ /* Payload. */
+ memcpy(&_payload[_payloadLen], payload, len);
+ _payloadLen += len;
+
+ return BLE_ERROR_NONE;
}
/**
@@ -417,63 +345,7 @@
return (uint16_t)_appearance;
}
- /**
- * Search advertisement data for field.
- * Returns pointer to the first element in the field if found, NULL otherwise.
- * Where the first element is the length of the field.
- */
- const uint8_t* findField(DataType_t type) const {
- return findField(type);
- }
-
private:
- /**
- * Append advertising data based on the specified AD type (see DataType)
- */
- ble_error_t appendField(DataType advDataType, const uint8_t *payload, uint8_t len)
- {
- /* Make sure we don't exceed the 31 byte payload limit */
- if (_payloadLen + len + 2 > GAP_ADVERTISING_DATA_MAX_PAYLOAD) {
- return BLE_ERROR_BUFFER_OVERFLOW;
- }
-
- /* Field length. */
- memset(&_payload[_payloadLen], len + 1, 1);
- _payloadLen++;
-
- /* Field ID. */
- memset(&_payload[_payloadLen], (uint8_t)advDataType, 1);
- _payloadLen++;
-
- /* Payload. */
- memcpy(&_payload[_payloadLen], payload, len);
- _payloadLen += len;
-
- return BLE_ERROR_NONE;
- }
-
- /**
- * Search advertisement data for field.
- * Returns pointer to the first element in the field if found, NULL otherwise.
- * Where the first element is the length of the field.
- */
- uint8_t* findField(DataType_t type) {
- // scan through advertisement data
- for (uint8_t idx = 0; idx < _payloadLen; ) {
- uint8_t fieldType = _payload[idx + 1];
-
- if (fieldType == type) {
- return &_payload[idx];
- }
-
- // advance to next field
- idx += _payload[idx] + 1;
- }
-
- // field not found
- return NULL;
- }
-
uint8_t _payload[GAP_ADVERTISING_DATA_MAX_PAYLOAD];
uint8_t _payloadLen;
uint16_t _appearance;