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Code Issues Projects Releases Wiki Activity

Add workaround for Android UUID endianness bug.

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This commit is contained in:
akwizgran
2020-02-21 17:11:09 +00:00
parent 174e678304
commit 65c96514b5
1 changed files with 29 additions and 18 deletions
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47
bramble-android/src/main/java/org/briarproject/bramble/plugin/bluetooth/AndroidBluetoothPlugin.java
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@@ -26,11 +26,14 @@ import org.briarproject.bramble.util.AndroidUtils;
import org.briarproject.bramble.util.IoUtils;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.security.SecureRandom;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.TreeSet;
import java.util.UUID;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.ExecutionException;
@@ -57,6 +60,8 @@ import static android.bluetooth.BluetoothDevice.DEVICE_TYPE_LE;
import static android.bluetooth.BluetoothDevice.EXTRA_DEVICE;
import static android.bluetooth.BluetoothDevice.EXTRA_UUID;
import static android.os.Build.VERSION.SDK_INT;
import static java.nio.ByteOrder.LITTLE_ENDIAN;
import static java.util.Arrays.asList;
import static java.util.Collections.emptyList;
import static java.util.Collections.shuffle;
import static java.util.concurrent.TimeUnit.MILLISECONDS;
@@ -273,15 +278,11 @@ class AndroidBluetoothPlugin extends BluetoothPlugin<BluetoothServerSocket> {
List<BluetoothDevice> unknown = new ArrayList<>(devices);
for (BluetoothDevice d : devices) {
List<String> uuids = getUuids(d);
if (LOG.isLoggable(INFO)) {
LOG.info(uuids.size() + " cached UUIDs for "
+ scrubMacAddress(d.getAddress()));
}
Pair<TransportProperties, DiscoveryHandler> pair =
byAddress.remove(d.getAddress());
if (pair == null) {
for (String uuid : uuids) {
// Try cached UUIDs
for (String uuid : getUuids(d)) {
pair = byUuid.remove(uuid);
if (pair != null) {
if (LOG.isLoggable(INFO)) {
@@ -341,19 +342,17 @@ class AndroidBluetoothPlugin extends BluetoothPlugin<BluetoothServerSocket> {
if (i == null) break;
BluetoothDevice d = requireNonNull(
i.getParcelableExtra(EXTRA_DEVICE));
List<String> uuids = getUuids(d);
if (LOG.isLoggable(INFO)) {
LOG.info("Fetched UUIDs for "
+ scrubMacAddress(d.getAddress()));
}
Set<String> uuids = getUuids(d);
Parcelable[] extra = i.getParcelableArrayExtra(EXTRA_UUID);
if (extra != null) {
for (Parcelable p : extra) {
if (!uuids.contains(p.toString())) {
uuids.add(p.toString());
}
uuids.addAll(getUuidStrings((ParcelUuid) p));
}
}
if (LOG.isLoggable(INFO)) {
LOG.info("Fetched " + uuids.size() + " UUIDs for "
+ scrubMacAddress(d.getAddress()));
}
for (String uuid : uuids) {
Pair<TransportProperties, DiscoveryHandler> pair =
byUuid.remove(uuid);
@@ -396,14 +395,26 @@ class AndroidBluetoothPlugin extends BluetoothPlugin<BluetoothServerSocket> {
}
}
private List<String> getUuids(BluetoothDevice d) {
private Set<String> getUuids(BluetoothDevice d) {
Set<String> strings = new TreeSet<>();
ParcelUuid[] uuids = d.getUuids();
if (uuids == null) return new ArrayList<>();
List<String> strings = new ArrayList<>(uuids.length);
for (ParcelUuid u : uuids) strings.add(u.toString());
if (uuids == null) return strings;
for (ParcelUuid u : uuids) strings.addAll(getUuidStrings(u));
return strings;
}
// Workaround for https://code.google.com/p/android/issues/detail?id=197341
private List<String> getUuidStrings(ParcelUuid u) {
UUID forwards = u.getUuid();
ByteBuffer buf = ByteBuffer.allocate(16);
buf.putLong(forwards.getLeastSignificantBits());
buf.putLong(forwards.getMostSignificantBits());
buf.rewind();
buf.order(LITTLE_ENDIAN);
UUID backwards = new UUID(buf.getLong(), buf.getLong());
return asList(forwards.toString(), backwards.toString());
}
private List<BluetoothDevice> discoverDevices() {
if (adapter.isDiscovering()) {
LOG.info("Already discovering");