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-rw-r--r--core/java/android/accessibilityservice/BrailleDisplayController.java2
-rw-r--r--services/accessibility/java/com/android/server/accessibility/AccessibilityServiceConnection.java19
-rw-r--r--services/accessibility/java/com/android/server/accessibility/BrailleDisplayConnection.java53
-rw-r--r--services/core/jni/com_android_server_accessibility_BrailleDisplayConnection.cpp20
-rw-r--r--services/tests/servicestests/src/com/android/server/accessibility/BrailleDisplayConnectionTest.java49
5 files changed, 130 insertions, 13 deletions
diff --git a/core/java/android/accessibilityservice/BrailleDisplayController.java b/core/java/android/accessibilityservice/BrailleDisplayController.java
index 5282aa3fccf7..7334676c905d 100644
--- a/core/java/android/accessibilityservice/BrailleDisplayController.java
+++ b/core/java/android/accessibilityservice/BrailleDisplayController.java
@@ -305,4 +305,6 @@ public interface BrailleDisplayController {
@FlaggedApi(Flags.FLAG_BRAILLE_DISPLAY_HID)
@TestApi
String TEST_BRAILLE_DISPLAY_UNIQUE_ID = "UNIQUE_ID";
+ /** @hide */
+ String TEST_BRAILLE_DISPLAY_NAME = "NAME";
}
diff --git a/services/accessibility/java/com/android/server/accessibility/AccessibilityServiceConnection.java b/services/accessibility/java/com/android/server/accessibility/AccessibilityServiceConnection.java
index fb2805574ff0..1f65e15c1bff 100644
--- a/services/accessibility/java/com/android/server/accessibility/AccessibilityServiceConnection.java
+++ b/services/accessibility/java/com/android/server/accessibility/AccessibilityServiceConnection.java
@@ -37,6 +37,8 @@ import android.annotation.SuppressLint;
import android.annotation.UserIdInt;
import android.app.PendingIntent;
import android.bluetooth.BluetoothAdapter;
+import android.bluetooth.BluetoothDevice;
+import android.bluetooth.BluetoothManager;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
@@ -695,6 +697,13 @@ class AccessibilityServiceConnection extends AbstractAccessibilityServiceConnect
throw new IllegalArgumentException(
bluetoothAddress + " is not a valid Bluetooth address");
}
+ final BluetoothManager bluetoothManager =
+ mContext.getSystemService(BluetoothManager.class);
+ final String bluetoothDeviceName = bluetoothManager == null ? null :
+ bluetoothManager.getAdapter().getBondedDevices().stream()
+ .filter(device -> device.getAddress().equalsIgnoreCase(bluetoothAddress))
+ .map(BluetoothDevice::getName)
+ .findFirst().orElse(null);
synchronized (mLock) {
checkAccessibilityAccessLocked();
if (mBrailleDisplayConnection != null) {
@@ -706,7 +715,10 @@ class AccessibilityServiceConnection extends AbstractAccessibilityServiceConnect
connection.setTestData(mTestBrailleDisplays);
}
connection.connectLocked(
- bluetoothAddress, BrailleDisplayConnection.BUS_BLUETOOTH, controller);
+ bluetoothAddress,
+ bluetoothDeviceName,
+ BrailleDisplayConnection.BUS_BLUETOOTH,
+ controller);
}
}
@@ -763,7 +775,10 @@ class AccessibilityServiceConnection extends AbstractAccessibilityServiceConnect
connection.setTestData(mTestBrailleDisplays);
}
connection.connectLocked(
- usbSerialNumber, BrailleDisplayConnection.BUS_USB, controller);
+ usbSerialNumber,
+ usbDevice.getProductName(),
+ BrailleDisplayConnection.BUS_USB,
+ controller);
}
}
diff --git a/services/accessibility/java/com/android/server/accessibility/BrailleDisplayConnection.java b/services/accessibility/java/com/android/server/accessibility/BrailleDisplayConnection.java
index 8b41873636a9..b0da3f014452 100644
--- a/services/accessibility/java/com/android/server/accessibility/BrailleDisplayConnection.java
+++ b/services/accessibility/java/com/android/server/accessibility/BrailleDisplayConnection.java
@@ -24,6 +24,7 @@ import android.accessibilityservice.IBrailleDisplayConnection;
import android.accessibilityservice.IBrailleDisplayController;
import android.annotation.IntDef;
import android.annotation.NonNull;
+import android.annotation.Nullable;
import android.annotation.PermissionManuallyEnforced;
import android.annotation.RequiresNoPermission;
import android.bluetooth.BluetoothDevice;
@@ -33,6 +34,7 @@ import android.os.HandlerThread;
import android.os.IBinder;
import android.os.Process;
import android.os.RemoteException;
+import android.text.TextUtils;
import android.util.ArrayMap;
import android.util.ArraySet;
import android.util.Pair;
@@ -141,6 +143,8 @@ class BrailleDisplayConnection extends IBrailleDisplayConnection.Stub {
@BusType
int getDeviceBusType(@NonNull Path path);
+
+ String getName(@NonNull Path path);
}
/**
@@ -149,15 +153,19 @@ class BrailleDisplayConnection extends IBrailleDisplayConnection.Stub {
* <p>If found, saves instance state for this connection and starts a thread to
* read from the Braille display.
*
- * @param expectedUniqueId The expected unique ID of the device to connect, from
- * {@link UsbDevice#getSerialNumber()}
- * or {@link BluetoothDevice#getAddress()}
- * @param expectedBusType The expected bus type from {@link BusType}.
- * @param controller Interface containing oneway callbacks used to communicate with the
- * {@link android.accessibilityservice.BrailleDisplayController}.
+ * @param expectedUniqueId The expected unique ID of the device to connect, from
+ * {@link UsbDevice#getSerialNumber()} or
+ * {@link BluetoothDevice#getAddress()}.
+ * @param expectedName The expected name of the device to connect, from
+ * {@link BluetoothDevice#getName()} or
+ * {@link UsbDevice#getProductName()}.
+ * @param expectedBusType The expected bus type from {@link BusType}.
+ * @param controller Interface containing oneway callbacks used to communicate with the
+ * {@link android.accessibilityservice.BrailleDisplayController}.
*/
void connectLocked(
@NonNull String expectedUniqueId,
+ @Nullable String expectedName,
@BusType int expectedBusType,
@NonNull IBrailleDisplayController controller) {
Objects.requireNonNull(expectedUniqueId);
@@ -179,10 +187,20 @@ class BrailleDisplayConnection extends IBrailleDisplayConnection.Stub {
unableToGetDescriptor = true;
continue;
}
+ final boolean matchesIdentifier;
final String uniqueId = mScanner.getUniqueId(path);
+ if (uniqueId != null) {
+ matchesIdentifier = expectedUniqueId.equalsIgnoreCase(uniqueId);
+ } else {
+ // HIDIOCGRAWUNIQ was added in kernel version 5.7.
+ // If the device has an older kernel that does not support that ioctl then as a
+ // fallback we can check against the device name (from HIDIOCGRAWNAME).
+ final String name = mScanner.getName(path);
+ matchesIdentifier = !TextUtils.isEmpty(expectedName) && expectedName.equals(name);
+ }
if (isBrailleDisplay(descriptor)
&& mScanner.getDeviceBusType(path) == expectedBusType
- && expectedUniqueId.equalsIgnoreCase(uniqueId)) {
+ && matchesIdentifier) {
result.add(Pair.create(path.toFile(), descriptor));
}
}
@@ -498,6 +516,12 @@ class BrailleDisplayConnection extends IBrailleDisplayConnection.Stub {
Integer busType = readFromFileDescriptor(path, nativeInterface::getHidrawBusType);
return busType != null ? busType : BUS_UNKNOWN;
}
+
+ @Override
+ public String getName(@NonNull Path path) {
+ Objects.requireNonNull(path);
+ return readFromFileDescriptor(path, nativeInterface::getHidrawName);
+ }
};
}
@@ -542,6 +566,12 @@ class BrailleDisplayConnection extends IBrailleDisplayConnection.Stub {
BrailleDisplayController.TEST_BRAILLE_DISPLAY_BUS_BLUETOOTH)
? BUS_BLUETOOTH : BUS_USB;
}
+
+ @Override
+ public String getName(@NonNull Path path) {
+ return brailleDisplayMap.get(path).getString(
+ BrailleDisplayController.TEST_BRAILLE_DISPLAY_NAME);
+ }
};
return mScanner;
}
@@ -579,6 +609,8 @@ class BrailleDisplayConnection extends IBrailleDisplayConnection.Stub {
* @return the result of ioctl(HIDIOCGRAWINFO).bustype, or -1 if the ioctl fails.
*/
int getHidrawBusType(int fd);
+
+ String getHidrawName(int fd);
}
/** Native interface that actually calls native HIDRAW ioctls. */
@@ -602,6 +634,11 @@ class BrailleDisplayConnection extends IBrailleDisplayConnection.Stub {
public int getHidrawBusType(int fd) {
return nativeGetHidrawBusType(fd);
}
+
+ @Override
+ public String getHidrawName(int fd) {
+ return nativeGetHidrawName(fd);
+ }
}
private static native int nativeGetHidrawDescSize(int fd);
@@ -611,4 +648,6 @@ class BrailleDisplayConnection extends IBrailleDisplayConnection.Stub {
private static native String nativeGetHidrawUniq(int fd);
private static native int nativeGetHidrawBusType(int fd);
+
+ private static native String nativeGetHidrawName(int fd);
}
diff --git a/services/core/jni/com_android_server_accessibility_BrailleDisplayConnection.cpp b/services/core/jni/com_android_server_accessibility_BrailleDisplayConnection.cpp
index c3375236098a..180081c9173a 100644
--- a/services/core/jni/com_android_server_accessibility_BrailleDisplayConnection.cpp
+++ b/services/core/jni/com_android_server_accessibility_BrailleDisplayConnection.cpp
@@ -32,10 +32,10 @@ namespace android {
namespace {
-// Max size we allow for the result from HIDIOCGRAWUNIQ (Bluetooth address or USB serial number).
-// Copied from linux/hid.h struct hid_device->uniq char array size; the ioctl implementation
-// writes at most this many bytes to the provided buffer.
-constexpr int UNIQ_SIZE_MAX = 64;
+// Max sizes we allow for results from string ioctl calls, copied from UAPI linux/uhid.h.
+// The ioctl implementation writes at most this many bytes to the provided buffer:
+constexpr int NAME_SIZE_MAX = 128; // HIDIOCGRAWNAME (device name)
+constexpr int UNIQ_SIZE_MAX = 64; // HIDIOCGRAWUNIQ (BT address or USB serial number)
} // anonymous namespace
@@ -82,6 +82,16 @@ static jint com_android_server_accessibility_BrailleDisplayConnection_getHidrawB
return info.bustype;
}
+static jstring com_android_server_accessibility_BrailleDisplayConnection_getHidrawName(
+ JNIEnv* env, jclass /*clazz*/, int fd) {
+ char buf[NAME_SIZE_MAX];
+ if (ioctl(fd, HIDIOCGRAWNAME(NAME_SIZE_MAX), buf) < 0) {
+ return nullptr;
+ }
+ // Local ref is not deleted because it is returned to Java
+ return env->NewStringUTF(buf);
+}
+
static const JNINativeMethod gMethods[] = {
{"nativeGetHidrawDescSize", "(I)I",
(void*)com_android_server_accessibility_BrailleDisplayConnection_getHidrawDescSize},
@@ -91,6 +101,8 @@ static const JNINativeMethod gMethods[] = {
(void*)com_android_server_accessibility_BrailleDisplayConnection_getHidrawUniq},
{"nativeGetHidrawBusType", "(I)I",
(void*)com_android_server_accessibility_BrailleDisplayConnection_getHidrawBusType},
+ {"nativeGetHidrawName", "(I)Ljava/lang/String;",
+ (void*)com_android_server_accessibility_BrailleDisplayConnection_getHidrawName},
};
int register_com_android_server_accessibility_BrailleDisplayConnection(JNIEnv* env) {
diff --git a/services/tests/servicestests/src/com/android/server/accessibility/BrailleDisplayConnectionTest.java b/services/tests/servicestests/src/com/android/server/accessibility/BrailleDisplayConnectionTest.java
index 344e2c21f0a5..69a98ace1c33 100644
--- a/services/tests/servicestests/src/com/android/server/accessibility/BrailleDisplayConnectionTest.java
+++ b/services/tests/servicestests/src/com/android/server/accessibility/BrailleDisplayConnectionTest.java
@@ -27,6 +27,7 @@ import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;
import android.accessibilityservice.BrailleDisplayController;
+import android.accessibilityservice.IBrailleDisplayController;
import android.content.Context;
import android.os.Bundle;
import android.os.IBinder;
@@ -174,6 +175,17 @@ public class BrailleDisplayConnectionTest {
}
@Test
+ public void defaultNativeScanner_getName_returnsName() {
+ String name = "My Braille Display";
+ when(mNativeInterface.getHidrawName(anyInt())).thenReturn(name);
+
+ BrailleDisplayConnection.BrailleDisplayScanner scanner =
+ BrailleDisplayConnection.getDefaultNativeScanner(mNativeInterface);
+
+ assertThat(scanner.getName(NULL_PATH)).isEqualTo(name);
+ }
+
+ @Test
public void write_bypassesServiceSideCheckWithLargeBuffer_disconnects() {
Mockito.doNothing().when(mBrailleDisplayConnection).disconnect();
mBrailleDisplayConnection.write(
@@ -201,6 +213,38 @@ public class BrailleDisplayConnectionTest {
verify(mBrailleDisplayConnection).disconnect();
}
+ @Test
+ public void connect_unableToGetUniq_usesNameFallback() throws Exception {
+ try {
+ IBrailleDisplayController controller =
+ Mockito.mock(IBrailleDisplayController.class);
+ final Path path = Path.of("/dev/null");
+ final String macAddress = "00:11:22:33:AA:BB";
+ final String name = "My Braille Display";
+ final byte[] descriptor = {0x05, 0x41};
+ Bundle bd = new Bundle();
+ bd.putString(BrailleDisplayController.TEST_BRAILLE_DISPLAY_HIDRAW_PATH,
+ path.toString());
+ bd.putByteArray(BrailleDisplayController.TEST_BRAILLE_DISPLAY_DESCRIPTOR,
+ descriptor);
+ bd.putString(BrailleDisplayController.TEST_BRAILLE_DISPLAY_NAME, name);
+ bd.putBoolean(BrailleDisplayController.TEST_BRAILLE_DISPLAY_BUS_BLUETOOTH, true);
+ bd.putString(BrailleDisplayController.TEST_BRAILLE_DISPLAY_UNIQUE_ID, null);
+ BrailleDisplayConnection.BrailleDisplayScanner scanner =
+ mBrailleDisplayConnection.setTestData(List.of(bd));
+ // Validate that the test data is set up correctly before attempting connection:
+ assertThat(scanner.getUniqueId(path)).isNull();
+ assertThat(scanner.getName(path)).isEqualTo(name);
+
+ mBrailleDisplayConnection.connectLocked(
+ macAddress, name, BrailleDisplayConnection.BUS_BLUETOOTH, controller);
+
+ verify(controller).onConnected(eq(mBrailleDisplayConnection), eq(descriptor));
+ } finally {
+ mBrailleDisplayConnection.disconnect();
+ }
+ }
+
// BrailleDisplayConnection#setTestData() is used to enable CTS testing with
// test Braille display data, but its own implementation should also be tested
// so that issues in this helper don't cause confusing failures in CTS.
@@ -220,6 +264,9 @@ public class BrailleDisplayConnectionTest {
String uniq1 = "uniq1", uniq2 = "uniq2";
bd1.putString(BrailleDisplayController.TEST_BRAILLE_DISPLAY_UNIQUE_ID, uniq1);
bd2.putString(BrailleDisplayController.TEST_BRAILLE_DISPLAY_UNIQUE_ID, uniq2);
+ String name1 = "name1", name2 = "name2";
+ bd1.putString(BrailleDisplayController.TEST_BRAILLE_DISPLAY_NAME, name1);
+ bd2.putString(BrailleDisplayController.TEST_BRAILLE_DISPLAY_NAME, name2);
int bus1 = BrailleDisplayConnection.BUS_USB, bus2 =
BrailleDisplayConnection.BUS_BLUETOOTH;
bd1.putBoolean(BrailleDisplayController.TEST_BRAILLE_DISPLAY_BUS_BLUETOOTH,
@@ -235,6 +282,8 @@ public class BrailleDisplayConnectionTest {
expect.that(scanner.getDeviceReportDescriptor(path2)).isEqualTo(desc2);
expect.that(scanner.getUniqueId(path1)).isEqualTo(uniq1);
expect.that(scanner.getUniqueId(path2)).isEqualTo(uniq2);
+ expect.that(scanner.getName(path1)).isEqualTo(name1);
+ expect.that(scanner.getName(path2)).isEqualTo(name2);
expect.that(scanner.getDeviceBusType(path1)).isEqualTo(bus1);
expect.that(scanner.getDeviceBusType(path2)).isEqualTo(bus2);
}