/**
* @see Beacon#mRssi
* @param rssi
* @return builder
*/
public Builder setRssi(int rssi) {
mBeacon.mRssi = rssi;
return this;
}
@TargetApi(5)
protected Beacon fromScanData(
byte[] bytesToProcess, int rssi, BluetoothDevice device, Beacon beacon) {
BleAdvertisement advert = new BleAdvertisement(bytesToProcess);
boolean parseFailed = false;
Pdu pduToParse = null;
int startByte = 0;
ArrayList<Identifier> identifiers = new ArrayList<Identifier>();
ArrayList<Long> dataFields = new ArrayList<Long>();
for (Pdu pdu : advert.getPdus()) {
if (pdu.getType() == Pdu.GATT_SERVICE_UUID_PDU_TYPE
|| pdu.getType() == Pdu.MANUFACTURER_DATA_PDU_TYPE) {
pduToParse = pdu;
if (LogManager.isVerboseLoggingEnabled()) {
LogManager.d(
TAG,
"Processing pdu type %02X: %s with startIndex: %d, endIndex: %d",
pdu.getType(),
bytesToHex(bytesToProcess),
pdu.getStartIndex(),
pdu.getEndIndex());
}
break;
} else {
if (LogManager.isVerboseLoggingEnabled()) {
LogManager.d(TAG, "Ignoring pdu type %02X", pdu.getType());
}
}
}
if (pduToParse == null) {
if (LogManager.isVerboseLoggingEnabled()) {
LogManager.d(TAG, "No PDUs to process in this packet.");
}
parseFailed = true;
} else {
byte[] serviceUuidBytes = null;
byte[] typeCodeBytes =
longToByteArray(
getMatchingBeaconTypeCode(),
mMatchingBeaconTypeCodeEndOffset - mMatchingBeaconTypeCodeStartOffset + 1);
if (getServiceUuid() != null) {
serviceUuidBytes =
longToByteArray(
getServiceUuid(), mServiceUuidEndOffset - mServiceUuidStartOffset + 1, false);
}
startByte = pduToParse.getStartIndex();
boolean patternFound = false;
if (getServiceUuid() == null) {
if (byteArraysMatch(
bytesToProcess, startByte + mMatchingBeaconTypeCodeStartOffset, typeCodeBytes, 0)) {
patternFound = true;
}
} else {
if (byteArraysMatch(
bytesToProcess, startByte + mServiceUuidStartOffset, serviceUuidBytes, 0)
&& byteArraysMatch(
bytesToProcess, startByte + mMatchingBeaconTypeCodeStartOffset, typeCodeBytes, 0)) {
patternFound = true;
}
}
if (patternFound == false) {
// This is not a beacon
if (getServiceUuid() == null) {
if (LogManager.isVerboseLoggingEnabled()) {
LogManager.d(
TAG,
"This is not a matching Beacon advertisement. (Was expecting %s. "
+ "The bytes I see are: %s",
byteArrayToString(typeCodeBytes),
bytesToHex(bytesToProcess));
}
} else {
if (LogManager.isVerboseLoggingEnabled()) {
LogManager.d(
TAG,
"This is not a matching Beacon advertisement. Was expecting %s at offset %d and %s at offset %d. "
+ "The bytes I see are: %s",
byteArrayToString(serviceUuidBytes),
startByte + mServiceUuidStartOffset,
byteArrayToString(typeCodeBytes),
startByte + mMatchingBeaconTypeCodeStartOffset,
bytesToHex(bytesToProcess));
}
}
parseFailed = true;
beacon = null;
} else {
if (LogManager.isVerboseLoggingEnabled()) {
LogManager.d(
TAG,
"This is a recognized beacon advertisement -- %s seen",
byteArrayToString(typeCodeBytes));
}
}
if (patternFound) {
if (bytesToProcess.length <= startByte + mLayoutSize && mAllowPduOverflow) {
// If the layout size is bigger than this PDU, and we allow overflow. Make sure
// the byte buffer is big enough by zero padding the end so we don't try to read
// outside the byte array of the advertisement
if (LogManager.isVerboseLoggingEnabled()) {
LogManager.d(
TAG,
"Expanding buffer because it is too short to parse: "
+ bytesToProcess.length
+ ", needed: "
+ (startByte + mLayoutSize));
}
bytesToProcess = ensureMaxSize(bytesToProcess, startByte + mLayoutSize);
}
for (int i = 0; i < mIdentifierEndOffsets.size(); i++) {
int endIndex = mIdentifierEndOffsets.get(i) + startByte;
if (endIndex > pduToParse.getEndIndex() && mIdentifierVariableLengthFlags.get(i)) {
if (LogManager.isVerboseLoggingEnabled()) {
LogManager.d(
TAG, "Need to truncate identifier by " + (endIndex - pduToParse.getEndIndex()));
}
// If this is a variable length identifier, we truncate it to the size that
// is available in the packet
Identifier identifier =
Identifier.fromBytes(
bytesToProcess,
mIdentifierStartOffsets.get(i) + startByte,
pduToParse.getEndIndex() + 1,
mIdentifierLittleEndianFlags.get(i));
identifiers.add(identifier);
} else if (endIndex > pduToParse.getEndIndex() && !mAllowPduOverflow) {
parseFailed = true;
if (LogManager.isVerboseLoggingEnabled()) {
LogManager.d(
TAG,
"Cannot parse identifier "
+ i
+ " because PDU is too short. endIndex: "
+ endIndex
+ " PDU endIndex: "
+ pduToParse.getEndIndex());
}
} else {
Identifier identifier =
Identifier.fromBytes(
bytesToProcess,
mIdentifierStartOffsets.get(i) + startByte,
endIndex + 1,
mIdentifierLittleEndianFlags.get(i));
identifiers.add(identifier);
}
}
for (int i = 0; i < mDataEndOffsets.size(); i++) {
int endIndex = mDataEndOffsets.get(i) + startByte;
if (endIndex > pduToParse.getEndIndex() && !mAllowPduOverflow) {
if (LogManager.isVerboseLoggingEnabled()) {
LogManager.d(
TAG,
"Cannot parse data field "
+ i
+ " because PDU is too short. endIndex: "
+ endIndex
+ " PDU endIndex: "
+ pduToParse.getEndIndex()
+ ". Setting value to 0");
}
dataFields.add(new Long(0l));
} else {
String dataString =
byteArrayToFormattedString(
bytesToProcess,
mDataStartOffsets.get(i) + startByte,
endIndex,
mDataLittleEndianFlags.get(i));
dataFields.add(Long.parseLong(dataString));
}
}
if (mPowerStartOffset != null) {
int endIndex = mPowerEndOffset + startByte;
int txPower = 0;
try {
if (endIndex > pduToParse.getEndIndex() && !mAllowPduOverflow) {
parseFailed = true;
if (LogManager.isVerboseLoggingEnabled()) {
LogManager.d(
TAG,
"Cannot parse power field because PDU is too short. endIndex: "
+ endIndex
+ " PDU endIndex: "
+ pduToParse.getEndIndex());
}
} else {
String powerString =
byteArrayToFormattedString(
bytesToProcess,
mPowerStartOffset + startByte,
mPowerEndOffset + startByte,
false);
txPower = Integer.parseInt(powerString) + mDBmCorrection;
// make sure it is a signed integer
if (txPower > 127) {
txPower -= 256;
}
beacon.mTxPower = txPower;
}
} catch (NumberFormatException e1) {
// keep default value
} catch (NullPointerException e2) {
// keep default value
}
}
}
}
if (parseFailed) {
beacon = null;
} else {
int beaconTypeCode = 0;
String beaconTypeString =
byteArrayToFormattedString(
bytesToProcess,
mMatchingBeaconTypeCodeStartOffset + startByte,
mMatchingBeaconTypeCodeEndOffset + startByte,
false);
beaconTypeCode = Integer.parseInt(beaconTypeString);
// TODO: error handling needed on the parse
int manufacturer = 0;
String manufacturerString =
byteArrayToFormattedString(bytesToProcess, startByte, startByte + 1, true);
manufacturer = Integer.parseInt(manufacturerString);
String macAddress = null;
String name = null;
if (device != null) {
macAddress = device.getAddress();
name = device.getName();
}
beacon.mIdentifiers = identifiers;
beacon.mDataFields = dataFields;
beacon.mRssi = rssi;
beacon.mBeaconTypeCode = beaconTypeCode;
if (mServiceUuid != null) {
beacon.mServiceUuid = (int) mServiceUuid.longValue();
} else {
beacon.mServiceUuid = -1;
}
beacon.mBluetoothAddress = macAddress;
beacon.mBluetoothName = name;
beacon.mManufacturer = manufacturer;
beacon.mParserIdentifier = mIdentifier;
}
return beacon;
}