/* * 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.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 */ 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 */ public static final ParcelUuid AudioSink = ParcelUuid.fromString("0000110B-0000-1000-8000-00805F9B34FB"); public static final ParcelUuid AudioSource = ParcelUuid.fromString("0000110A-0000-1000-8000-00805F9B34FB"); public static final ParcelUuid AdvAudioDist = ParcelUuid.fromString("0000110D-0000-1000-8000-00805F9B34FB"); public static final ParcelUuid HSP = ParcelUuid.fromString("00001108-0000-1000-8000-00805F9B34FB"); public static final ParcelUuid HSP_AG = ParcelUuid.fromString("00001112-0000-1000-8000-00805F9B34FB"); public static final ParcelUuid Handsfree = ParcelUuid.fromString("0000111E-0000-1000-8000-00805F9B34FB"); public static final ParcelUuid Handsfree_AG = ParcelUuid.fromString("0000111F-0000-1000-8000-00805F9B34FB"); public static final ParcelUuid AvrcpController = ParcelUuid.fromString("0000110E-0000-1000-8000-00805F9B34FB"); public static final ParcelUuid AvrcpTarget = ParcelUuid.fromString("0000110C-0000-1000-8000-00805F9B34FB"); public static final ParcelUuid ObexObjectPush = ParcelUuid.fromString("00001105-0000-1000-8000-00805f9b34fb"); public static final ParcelUuid Hid = ParcelUuid.fromString("00001124-0000-1000-8000-00805f9b34fb"); public static final ParcelUuid Hogp = ParcelUuid.fromString("00001812-0000-1000-8000-00805f9b34fb"); public static final ParcelUuid PANU = ParcelUuid.fromString("00001115-0000-1000-8000-00805F9B34FB"); public static final ParcelUuid NAP = ParcelUuid.fromString("00001116-0000-1000-8000-00805F9B34FB"); public static final ParcelUuid BNEP = ParcelUuid.fromString("0000000f-0000-1000-8000-00805F9B34FB"); public static final ParcelUuid PBAP_PSE = ParcelUuid.fromString("0000112f-0000-1000-8000-00805F9B34FB"); public static final ParcelUuid MAP = ParcelUuid.fromString("00001134-0000-1000-8000-00805F9B34FB"); public static final ParcelUuid MNS = ParcelUuid.fromString("00001133-0000-1000-8000-00805F9B34FB"); public static final ParcelUuid MAS = ParcelUuid.fromString("00001132-0000-1000-8000-00805F9B34FB"); public static final ParcelUuid BASE_UUID = ParcelUuid.fromString("00000000-0000-1000-8000-00805F9B34FB"); /** Length of bytes for 16 bit UUID */ public static final int UUID_BYTES_16_BIT = 2; /** Length of bytes for 32 bit UUID */ public static final int UUID_BYTES_32_BIT = 4; /** Length of bytes for 128 bit UUID */ public static final int UUID_BYTES_128_BIT = 16; public static final ParcelUuid[] RESERVED_UUIDS = { AudioSink, AudioSource, AdvAudioDist, HSP, Handsfree, AvrcpController, AvrcpTarget, ObexObjectPush, PANU, NAP, MAP, MNS, MAS}; public static boolean isAudioSource(ParcelUuid uuid) { return uuid.equals(AudioSource); } public static boolean isAudioSink(ParcelUuid uuid) { return uuid.equals(AudioSink); } public static boolean isAdvAudioDist(ParcelUuid uuid) { return uuid.equals(AdvAudioDist); } public static boolean isHandsfree(ParcelUuid uuid) { return uuid.equals(Handsfree); } public static boolean isHeadset(ParcelUuid uuid) { return uuid.equals(HSP); } public static boolean isAvrcpController(ParcelUuid uuid) { return uuid.equals(AvrcpController); } public static boolean isAvrcpTarget(ParcelUuid uuid) { return uuid.equals(AvrcpTarget); } public static boolean isInputDevice(ParcelUuid uuid) { return uuid.equals(Hid); } public static boolean isPanu(ParcelUuid uuid) { return uuid.equals(PANU); } public static boolean isNap(ParcelUuid uuid) { return uuid.equals(NAP); } public static boolean isBnep(ParcelUuid uuid) { return uuid.equals(BNEP); } public static boolean isMap(ParcelUuid uuid) { return uuid.equals(MAP); } public static boolean isMns(ParcelUuid uuid) { return uuid.equals(MNS); } public static boolean isMas(ParcelUuid uuid) { return uuid.equals(MAS); } /** * Returns true if ParcelUuid is present in uuidArray * * @param uuidArray - Array of ParcelUuids * @param uuid */ public static boolean isUuidPresent(ParcelUuid[] uuidArray, ParcelUuid uuid) { if ((uuidArray == null || uuidArray.length == 0) && uuid == null) return true; if (uuidArray == null) return false; for (ParcelUuid element: uuidArray) { if (element.equals(uuid)) return true; } return false; } /** * Returns true if there any common ParcelUuids in uuidA and uuidB. * * @param uuidA - List of ParcelUuids * @param uuidB - List of ParcelUuids * */ public static boolean containsAnyUuid(ParcelUuid[] uuidA, ParcelUuid[] uuidB) { if (uuidA == null && uuidB == null) return true; if (uuidA == null) { return uuidB.length == 0 ? true : false; } if (uuidB == null) { return uuidA.length == 0 ? true : false; } HashSet uuidSet = new HashSet (Arrays.asList(uuidA)); for (ParcelUuid uuid: uuidB) { if (uuidSet.contains(uuid)) return true; } return false; } /** * Returns true if all the ParcelUuids in ParcelUuidB are present in * ParcelUuidA * * @param uuidA - Array of ParcelUuidsA * @param uuidB - Array of ParcelUuidsB * */ public static boolean containsAllUuids(ParcelUuid[] uuidA, ParcelUuid[] uuidB) { if (uuidA == null && uuidB == null) return true; if (uuidA == null) { return uuidB.length == 0 ? true : false; } if (uuidB == null) return true; HashSet uuidSet = new HashSet (Arrays.asList(uuidA)); for (ParcelUuid uuid: uuidB) { if (!uuidSet.contains(uuid)) return false; } return true; } /** * 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. */ public static int getServiceIdentifierFromParcelUuid(ParcelUuid parcelUuid) { UUID uuid = parcelUuid.getUuid(); long value = (uuid.getMostSignificantBits() & 0x0000FFFF00000000L) >>> 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. */ public static ParcelUuid parseUuidFrom(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)); } /** * 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. */ 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. */ 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); } }