| /* |
| * Copyright (C) 2009 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package android.bluetooth; |
| |
| import android.annotation.NonNull; |
| import android.annotation.Nullable; |
| import android.annotation.SystemApi; |
| import android.compat.annotation.UnsupportedAppUsage; |
| import android.os.ParcelUuid; |
| |
| import java.nio.ByteBuffer; |
| import java.nio.ByteOrder; |
| import java.util.Arrays; |
| import java.util.HashSet; |
| import java.util.UUID; |
| |
| /** |
| * Static helper methods and constants to decode the ParcelUuid of remote devices. |
| * |
| * @hide |
| */ |
| @SystemApi |
| public final class BluetoothUuid { |
| |
| /* See Bluetooth Assigned Numbers document - SDP section, to get the values of UUIDs |
| * for the various services. |
| * |
| * The following 128 bit values are calculated as: |
| * uuid * 2^96 + BASE_UUID |
| */ |
| |
| /** @hide */ |
| @NonNull |
| @SystemApi |
| public static final ParcelUuid A2DP_SINK = |
| ParcelUuid.fromString("0000110B-0000-1000-8000-00805F9B34FB"); |
| /** @hide */ |
| @NonNull |
| @SystemApi |
| public static final ParcelUuid A2DP_SOURCE = |
| ParcelUuid.fromString("0000110A-0000-1000-8000-00805F9B34FB"); |
| /** @hide */ |
| @NonNull |
| @SystemApi |
| public static final ParcelUuid ADV_AUDIO_DIST = |
| ParcelUuid.fromString("0000110D-0000-1000-8000-00805F9B34FB"); |
| /** @hide */ |
| @NonNull |
| @SystemApi |
| public static final ParcelUuid HSP = |
| ParcelUuid.fromString("00001108-0000-1000-8000-00805F9B34FB"); |
| /** @hide */ |
| @NonNull |
| @SystemApi |
| public static final ParcelUuid HSP_AG = |
| ParcelUuid.fromString("00001112-0000-1000-8000-00805F9B34FB"); |
| /** @hide */ |
| @NonNull |
| @SystemApi |
| public static final ParcelUuid HFP = |
| ParcelUuid.fromString("0000111E-0000-1000-8000-00805F9B34FB"); |
| /** @hide */ |
| @NonNull |
| @SystemApi |
| public static final ParcelUuid HFP_AG = |
| ParcelUuid.fromString("0000111F-0000-1000-8000-00805F9B34FB"); |
| /** @hide */ |
| @NonNull |
| @SystemApi |
| public static final ParcelUuid AVRCP_CONTROLLER = |
| ParcelUuid.fromString("0000110E-0000-1000-8000-00805F9B34FB"); |
| /** @hide */ |
| @NonNull |
| @SystemApi |
| public static final ParcelUuid AVRCP_TARGET = |
| ParcelUuid.fromString("0000110C-0000-1000-8000-00805F9B34FB"); |
| /** @hide */ |
| @NonNull |
| @SystemApi |
| public static final ParcelUuid OBEX_OBJECT_PUSH = |
| ParcelUuid.fromString("00001105-0000-1000-8000-00805f9b34fb"); |
| /** @hide */ |
| @NonNull |
| @SystemApi |
| public static final ParcelUuid HID = |
| ParcelUuid.fromString("00001124-0000-1000-8000-00805f9b34fb"); |
| /** @hide */ |
| @NonNull |
| @SystemApi |
| public static final ParcelUuid HOGP = |
| ParcelUuid.fromString("00001812-0000-1000-8000-00805f9b34fb"); |
| /** @hide */ |
| @NonNull |
| @SystemApi |
| public static final ParcelUuid PANU = |
| ParcelUuid.fromString("00001115-0000-1000-8000-00805F9B34FB"); |
| /** @hide */ |
| @NonNull |
| @SystemApi |
| public static final ParcelUuid NAP = |
| ParcelUuid.fromString("00001116-0000-1000-8000-00805F9B34FB"); |
| /** @hide */ |
| @NonNull |
| @SystemApi |
| public static final ParcelUuid BNEP = |
| ParcelUuid.fromString("0000000f-0000-1000-8000-00805F9B34FB"); |
| /** @hide */ |
| @NonNull |
| @SystemApi |
| public static final ParcelUuid PBAP_PCE = |
| ParcelUuid.fromString("0000112e-0000-1000-8000-00805F9B34FB"); |
| /** @hide */ |
| @NonNull |
| @SystemApi |
| public static final ParcelUuid PBAP_PSE = |
| ParcelUuid.fromString("0000112f-0000-1000-8000-00805F9B34FB"); |
| /** @hide */ |
| @NonNull |
| @SystemApi |
| public static final ParcelUuid MAP = |
| ParcelUuid.fromString("00001134-0000-1000-8000-00805F9B34FB"); |
| /** @hide */ |
| @NonNull |
| @SystemApi |
| public static final ParcelUuid MNS = |
| ParcelUuid.fromString("00001133-0000-1000-8000-00805F9B34FB"); |
| /** @hide */ |
| @NonNull |
| @SystemApi |
| public static final ParcelUuid MAS = |
| ParcelUuid.fromString("00001132-0000-1000-8000-00805F9B34FB"); |
| /** @hide */ |
| @NonNull |
| @SystemApi |
| public static final ParcelUuid SAP = |
| ParcelUuid.fromString("0000112D-0000-1000-8000-00805F9B34FB"); |
| /** @hide */ |
| @NonNull |
| @SystemApi |
| public static final ParcelUuid HEARING_AID = |
| ParcelUuid.fromString("0000FDF0-0000-1000-8000-00805f9b34fb"); |
| |
| /** @hide */ |
| @NonNull |
| @SystemApi |
| public static final ParcelUuid BASE_UUID = |
| ParcelUuid.fromString("00000000-0000-1000-8000-00805F9B34FB"); |
| |
| /** |
| * Length of bytes for 16 bit UUID |
| * |
| * @hide |
| */ |
| @SystemApi |
| public static final int UUID_BYTES_16_BIT = 2; |
| /** |
| * Length of bytes for 32 bit UUID |
| * |
| * @hide |
| */ |
| @SystemApi |
| public static final int UUID_BYTES_32_BIT = 4; |
| /** |
| * Length of bytes for 128 bit UUID |
| * |
| * @hide |
| */ |
| @SystemApi |
| public static final int UUID_BYTES_128_BIT = 16; |
| |
| /** |
| * Returns true if there any common ParcelUuids in uuidA and uuidB. |
| * |
| * @param uuidA - List of ParcelUuids |
| * @param uuidB - List of ParcelUuids |
| * |
| * @hide |
| */ |
| @SystemApi |
| public static boolean containsAnyUuid(@Nullable ParcelUuid[] uuidA, |
| @Nullable ParcelUuid[] uuidB) { |
| if (uuidA == null && uuidB == null) return true; |
| |
| if (uuidA == null) { |
| return uuidB.length == 0; |
| } |
| |
| if (uuidB == null) { |
| return uuidA.length == 0; |
| } |
| |
| HashSet<ParcelUuid> uuidSet = new HashSet<ParcelUuid>(Arrays.asList(uuidA)); |
| for (ParcelUuid uuid : uuidB) { |
| if (uuidSet.contains(uuid)) return true; |
| } |
| return false; |
| } |
| |
| /** |
| * Extract the Service Identifier or the actual uuid from the Parcel Uuid. |
| * For example, if 0000110B-0000-1000-8000-00805F9B34FB is the parcel Uuid, |
| * this function will return 110B |
| * |
| * @param parcelUuid |
| * @return the service identifier. |
| */ |
| private static int getServiceIdentifierFromParcelUuid(ParcelUuid parcelUuid) { |
| UUID uuid = parcelUuid.getUuid(); |
| long value = (uuid.getMostSignificantBits() & 0xFFFFFFFF00000000L) >>> 32; |
| return (int) value; |
| } |
| |
| /** |
| * Parse UUID from bytes. The {@code uuidBytes} can represent a 16-bit, 32-bit or 128-bit UUID, |
| * but the returned UUID is always in 128-bit format. |
| * Note UUID is little endian in Bluetooth. |
| * |
| * @param uuidBytes Byte representation of uuid. |
| * @return {@link ParcelUuid} parsed from bytes. |
| * @throws IllegalArgumentException If the {@code uuidBytes} cannot be parsed. |
| * |
| * @hide |
| */ |
| @NonNull |
| @SystemApi |
| public static ParcelUuid parseUuidFrom(@Nullable byte[] uuidBytes) { |
| if (uuidBytes == null) { |
| throw new IllegalArgumentException("uuidBytes cannot be null"); |
| } |
| int length = uuidBytes.length; |
| if (length != UUID_BYTES_16_BIT && length != UUID_BYTES_32_BIT |
| && length != UUID_BYTES_128_BIT) { |
| throw new IllegalArgumentException("uuidBytes length invalid - " + length); |
| } |
| |
| // Construct a 128 bit UUID. |
| if (length == UUID_BYTES_128_BIT) { |
| ByteBuffer buf = ByteBuffer.wrap(uuidBytes).order(ByteOrder.LITTLE_ENDIAN); |
| long msb = buf.getLong(8); |
| long lsb = buf.getLong(0); |
| return new ParcelUuid(new UUID(msb, lsb)); |
| } |
| |
| // For 16 bit and 32 bit UUID we need to convert them to 128 bit value. |
| // 128_bit_value = uuid * 2^96 + BASE_UUID |
| long shortUuid; |
| if (length == UUID_BYTES_16_BIT) { |
| shortUuid = uuidBytes[0] & 0xFF; |
| shortUuid += (uuidBytes[1] & 0xFF) << 8; |
| } else { |
| shortUuid = uuidBytes[0] & 0xFF; |
| shortUuid += (uuidBytes[1] & 0xFF) << 8; |
| shortUuid += (uuidBytes[2] & 0xFF) << 16; |
| shortUuid += (uuidBytes[3] & 0xFF) << 24; |
| } |
| long msb = BASE_UUID.getUuid().getMostSignificantBits() + (shortUuid << 32); |
| long lsb = BASE_UUID.getUuid().getLeastSignificantBits(); |
| return new ParcelUuid(new UUID(msb, lsb)); |
| } |
| |
| /** |
| * Parse UUID to bytes. The returned value is shortest representation, a 16-bit, 32-bit or |
| * 128-bit UUID, Note returned value is little endian (Bluetooth). |
| * |
| * @param uuid uuid to parse. |
| * @return shortest representation of {@code uuid} as bytes. |
| * @throws IllegalArgumentException If the {@code uuid} is null. |
| * |
| * @hide |
| */ |
| public static byte[] uuidToBytes(ParcelUuid uuid) { |
| if (uuid == null) { |
| throw new IllegalArgumentException("uuid cannot be null"); |
| } |
| |
| if (is16BitUuid(uuid)) { |
| byte[] uuidBytes = new byte[UUID_BYTES_16_BIT]; |
| int uuidVal = getServiceIdentifierFromParcelUuid(uuid); |
| uuidBytes[0] = (byte) (uuidVal & 0xFF); |
| uuidBytes[1] = (byte) ((uuidVal & 0xFF00) >> 8); |
| return uuidBytes; |
| } |
| |
| if (is32BitUuid(uuid)) { |
| byte[] uuidBytes = new byte[UUID_BYTES_32_BIT]; |
| int uuidVal = getServiceIdentifierFromParcelUuid(uuid); |
| uuidBytes[0] = (byte) (uuidVal & 0xFF); |
| uuidBytes[1] = (byte) ((uuidVal & 0xFF00) >> 8); |
| uuidBytes[2] = (byte) ((uuidVal & 0xFF0000) >> 16); |
| uuidBytes[3] = (byte) ((uuidVal & 0xFF000000) >> 24); |
| return uuidBytes; |
| } |
| |
| // Construct a 128 bit UUID. |
| long msb = uuid.getUuid().getMostSignificantBits(); |
| long lsb = uuid.getUuid().getLeastSignificantBits(); |
| |
| byte[] uuidBytes = new byte[UUID_BYTES_128_BIT]; |
| ByteBuffer buf = ByteBuffer.wrap(uuidBytes).order(ByteOrder.LITTLE_ENDIAN); |
| buf.putLong(8, msb); |
| buf.putLong(0, lsb); |
| return uuidBytes; |
| } |
| |
| /** |
| * Check whether the given parcelUuid can be converted to 16 bit bluetooth uuid. |
| * |
| * @param parcelUuid |
| * @return true if the parcelUuid can be converted to 16 bit uuid, false otherwise. |
| * |
| * @hide |
| */ |
| @UnsupportedAppUsage |
| public static boolean is16BitUuid(ParcelUuid parcelUuid) { |
| UUID uuid = parcelUuid.getUuid(); |
| if (uuid.getLeastSignificantBits() != BASE_UUID.getUuid().getLeastSignificantBits()) { |
| return false; |
| } |
| return ((uuid.getMostSignificantBits() & 0xFFFF0000FFFFFFFFL) == 0x1000L); |
| } |
| |
| |
| /** |
| * Check whether the given parcelUuid can be converted to 32 bit bluetooth uuid. |
| * |
| * @param parcelUuid |
| * @return true if the parcelUuid can be converted to 32 bit uuid, false otherwise. |
| * |
| * @hide |
| */ |
| @UnsupportedAppUsage |
| public static boolean is32BitUuid(ParcelUuid parcelUuid) { |
| UUID uuid = parcelUuid.getUuid(); |
| if (uuid.getLeastSignificantBits() != BASE_UUID.getUuid().getLeastSignificantBits()) { |
| return false; |
| } |
| if (is16BitUuid(parcelUuid)) { |
| return false; |
| } |
| return ((uuid.getMostSignificantBits() & 0xFFFFFFFFL) == 0x1000L); |
| } |
| |
| private BluetoothUuid() {} |
| } |
