Merge "Bluetooth: make it possible to advertise Transport Discovery Data"

5 files changed, 406 insertions, 5 deletions

diff --git a/core/api/current.txt b/core/api/current.txt
index 087b54ee86f2..b519cbeffe24 100644
--- a/core/api/current.txt
+++ b/core/api/current.txt
@@ -9546,6 +9546,7 @@ package android.bluetooth.le {
     method public java.util.Map<android.os.ParcelUuid,byte[]> getServiceData();
     method @NonNull public java.util.List<android.os.ParcelUuid> getServiceSolicitationUuids();
     method public java.util.List<android.os.ParcelUuid> getServiceUuids();
+    method @NonNull public java.util.List<android.bluetooth.le.TransportDiscoveryData> getTransportDiscoveryData();
     method public void writeToParcel(android.os.Parcel, int);
     field @NonNull public static final android.os.Parcelable.Creator<android.bluetooth.le.AdvertiseData> CREATOR;
   }
@@ -9556,6 +9557,7 @@ package android.bluetooth.le {
     method public android.bluetooth.le.AdvertiseData.Builder addServiceData(android.os.ParcelUuid, byte[]);
     method @NonNull public android.bluetooth.le.AdvertiseData.Builder addServiceSolicitationUuid(@NonNull android.os.ParcelUuid);
     method public android.bluetooth.le.AdvertiseData.Builder addServiceUuid(android.os.ParcelUuid);
+    method @NonNull public android.bluetooth.le.AdvertiseData.Builder addTransportDiscoveryData(@NonNull android.bluetooth.le.TransportDiscoveryData);
     method public android.bluetooth.le.AdvertiseData build();
     method public android.bluetooth.le.AdvertiseData.Builder setIncludeDeviceName(boolean);
     method public android.bluetooth.le.AdvertiseData.Builder setIncludeTxPowerLevel(boolean);
@@ -9815,6 +9817,31 @@ package android.bluetooth.le {
     method public android.bluetooth.le.ScanSettings.Builder setScanMode(int);
   }
 
+  public final class TransportBlock implements android.os.Parcelable {
+    ctor public TransportBlock(int, int, int, @Nullable byte[]);
+    method public int describeContents();
+    method public int getOrgId();
+    method public int getTdsFlags();
+    method @Nullable public byte[] getTransportData();
+    method public int getTransportDataLength();
+    method @Nullable public byte[] toByteArray();
+    method public int totalBytes();
+    method public void writeToParcel(@NonNull android.os.Parcel, int);
+    field @NonNull public static final android.os.Parcelable.Creator<android.bluetooth.le.TransportBlock> CREATOR;
+  }
+
+  public final class TransportDiscoveryData implements android.os.Parcelable {
+    ctor public TransportDiscoveryData(int, @NonNull java.util.List<android.bluetooth.le.TransportBlock>);
+    ctor public TransportDiscoveryData(@NonNull byte[]);
+    method public int describeContents();
+    method @NonNull public java.util.List<android.bluetooth.le.TransportBlock> getTransportBlocks();
+    method public int getTransportDataType();
+    method @Nullable public byte[] toByteArray();
+    method public int totalBytes();
+    method public void writeToParcel(@NonNull android.os.Parcel, int);
+    field @NonNull public static final android.os.Parcelable.Creator<android.bluetooth.le.TransportDiscoveryData> CREATOR;
+  }
+
 }
 
 package android.companion {
diff --git a/core/java/android/bluetooth/le/AdvertiseData.java b/core/java/android/bluetooth/le/AdvertiseData.java
index cec658049ca5..fdf62ec3a647 100644
--- a/core/java/android/bluetooth/le/AdvertiseData.java
+++ b/core/java/android/bluetooth/le/AdvertiseData.java
@@ -25,6 +25,7 @@ import android.util.ArrayMap;
 import android.util.SparseArray;
 
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.List;
 import java.util.Map;
 import java.util.Objects;
@@ -47,6 +48,9 @@ public final class AdvertiseData implements Parcelable {
     @NonNull
     private final List<ParcelUuid> mServiceSolicitationUuids;
 
+    @Nullable
+    private final List<TransportDiscoveryData> mTransportDiscoveryData;
+
     private final SparseArray<byte[]> mManufacturerSpecificData;
     private final Map<ParcelUuid, byte[]> mServiceData;
     private final boolean mIncludeTxPowerLevel;
@@ -54,12 +58,14 @@ public final class AdvertiseData implements Parcelable {
 
     private AdvertiseData(List<ParcelUuid> serviceUuids,
             List<ParcelUuid> serviceSolicitationUuids,
+            List<TransportDiscoveryData> transportDiscoveryData,
             SparseArray<byte[]> manufacturerData,
             Map<ParcelUuid, byte[]> serviceData,
             boolean includeTxPowerLevel,
             boolean includeDeviceName) {
         mServiceUuids = serviceUuids;
         mServiceSolicitationUuids = serviceSolicitationUuids;
+        mTransportDiscoveryData = transportDiscoveryData;
         mManufacturerSpecificData = manufacturerData;
         mServiceData = serviceData;
         mIncludeTxPowerLevel = includeTxPowerLevel;
@@ -83,6 +89,17 @@ public final class AdvertiseData implements Parcelable {
     }
 
     /**
+     * Returns a list of {@link TransportDiscoveryData} within the advertisement.
+     */
+    @NonNull
+    public List<TransportDiscoveryData> getTransportDiscoveryData() {
+        if (mTransportDiscoveryData == null) {
+            return Collections.emptyList();
+        }
+        return mTransportDiscoveryData;
+    }
+
+    /**
      * Returns an array of manufacturer Id and the corresponding manufacturer specific data. The
      * manufacturer id is a non-negative number assigned by Bluetooth SIG.
      */
@@ -116,8 +133,8 @@ public final class AdvertiseData implements Parcelable {
      */
     @Override
     public int hashCode() {
-        return Objects.hash(mServiceUuids, mServiceSolicitationUuids, mManufacturerSpecificData,
-                mServiceData, mIncludeDeviceName, mIncludeTxPowerLevel);
+        return Objects.hash(mServiceUuids, mServiceSolicitationUuids, mTransportDiscoveryData,
+                mManufacturerSpecificData, mServiceData, mIncludeDeviceName, mIncludeTxPowerLevel);
     }
 
     /**
@@ -134,6 +151,7 @@ public final class AdvertiseData implements Parcelable {
         AdvertiseData other = (AdvertiseData) obj;
         return Objects.equals(mServiceUuids, other.mServiceUuids)
                 && Objects.equals(mServiceSolicitationUuids, other.mServiceSolicitationUuids)
+                && Objects.equals(mTransportDiscoveryData, other.mTransportDiscoveryData)
                 && BluetoothLeUtils.equals(mManufacturerSpecificData,
                     other.mManufacturerSpecificData)
                 && BluetoothLeUtils.equals(mServiceData, other.mServiceData)
@@ -144,7 +162,8 @@ public final class AdvertiseData implements Parcelable {
     @Override
     public String toString() {
         return "AdvertiseData [mServiceUuids=" + mServiceUuids + ", mServiceSolicitationUuids="
-                + mServiceSolicitationUuids + ", mManufacturerSpecificData="
+                + mServiceSolicitationUuids + ", mTransportDiscoveryData="
+                + mTransportDiscoveryData + ", mManufacturerSpecificData="
                 + BluetoothLeUtils.toString(mManufacturerSpecificData) + ", mServiceData="
                 + BluetoothLeUtils.toString(mServiceData)
                 + ", mIncludeTxPowerLevel=" + mIncludeTxPowerLevel + ", mIncludeDeviceName="
@@ -162,6 +181,8 @@ public final class AdvertiseData implements Parcelable {
         dest.writeTypedArray(mServiceSolicitationUuids.toArray(
                 new ParcelUuid[mServiceSolicitationUuids.size()]), flags);
 
+        dest.writeTypedList(mTransportDiscoveryData);
+
         // mManufacturerSpecificData could not be null.
         dest.writeInt(mManufacturerSpecificData.size());
         for (int i = 0; i < mManufacturerSpecificData.size(); ++i) {
@@ -197,6 +218,12 @@ public final class AdvertiseData implements Parcelable {
                         builder.addServiceSolicitationUuid(uuid);
                     }
 
+                    List<TransportDiscoveryData> transportDiscoveryData =
+                            in.createTypedArrayList(TransportDiscoveryData.CREATOR);
+                    for (TransportDiscoveryData tdd : transportDiscoveryData) {
+                        builder.addTransportDiscoveryData(tdd);
+                    }
+
                     int manufacturerSize = in.readInt();
                     for (int i = 0; i < manufacturerSize; ++i) {
                         int manufacturerId = in.readInt();
@@ -223,6 +250,9 @@ public final class AdvertiseData implements Parcelable {
         private List<ParcelUuid> mServiceUuids = new ArrayList<ParcelUuid>();
         @NonNull
         private List<ParcelUuid> mServiceSolicitationUuids = new ArrayList<ParcelUuid>();
+        @Nullable
+        private List<TransportDiscoveryData> mTransportDiscoveryData =
+                new ArrayList<TransportDiscoveryData>();
         private SparseArray<byte[]> mManufacturerSpecificData = new SparseArray<byte[]>();
         private Map<ParcelUuid, byte[]> mServiceData = new ArrayMap<ParcelUuid, byte[]>();
         private boolean mIncludeTxPowerLevel;
@@ -256,6 +286,7 @@ public final class AdvertiseData implements Parcelable {
             mServiceSolicitationUuids.add(serviceSolicitationUuid);
             return this;
         }
+
         /**
          * Add service data to advertise data.
          *
@@ -274,6 +305,23 @@ public final class AdvertiseData implements Parcelable {
         }
 
         /**
+         * Add Transport Discovery Data to advertise data.
+         *
+         * @param transportDiscoveryData Transport Discovery Data, consisting of one or more
+         * Transport Blocks. Transport Discovery Data AD Type Code is already included.
+         * @throws IllegalArgumentException If the {@code transportDiscoveryData} is empty
+         */
+        @NonNull
+        public Builder addTransportDiscoveryData(
+                @NonNull TransportDiscoveryData transportDiscoveryData) {
+            if (transportDiscoveryData == null) {
+                throw new IllegalArgumentException("transportDiscoveryData is null");
+            }
+            mTransportDiscoveryData.add(transportDiscoveryData);
+            return this;
+        }
+
+        /**
          * Add manufacturer specific data.
          * <p>
          * Please refer to the Bluetooth Assigned Numbers document provided by the <a
@@ -319,8 +367,8 @@ public final class AdvertiseData implements Parcelable {
          */
         public AdvertiseData build() {
             return new AdvertiseData(mServiceUuids, mServiceSolicitationUuids,
-                    mManufacturerSpecificData, mServiceData, mIncludeTxPowerLevel,
-                    mIncludeDeviceName);
+                    mTransportDiscoveryData, mManufacturerSpecificData, mServiceData,
+                    mIncludeTxPowerLevel, mIncludeDeviceName);
         }
     }
 }
diff --git a/core/java/android/bluetooth/le/BluetoothLeAdvertiser.java b/core/java/android/bluetooth/le/BluetoothLeAdvertiser.java
index 58029745ab9c..b9f8a57a75ea 100644
--- a/core/java/android/bluetooth/le/BluetoothLeAdvertiser.java
+++ b/core/java/android/bluetooth/le/BluetoothLeAdvertiser.java
@@ -567,6 +567,9 @@ public final class BluetoothLeAdvertiser {
                         + num128BitUuids * BluetoothUuid.UUID_BYTES_128_BIT;
             }
         }
+        for (TransportDiscoveryData transportDiscoveryData : data.getTransportDiscoveryData()) {
+            size += OVERHEAD_BYTES_PER_FIELD + transportDiscoveryData.totalBytes();
+        }
         for (ParcelUuid uuid : data.getServiceData().keySet()) {
             int uuidLen = BluetoothUuid.uuidToBytes(uuid).length;
             size += OVERHEAD_BYTES_PER_FIELD + uuidLen
diff --git a/core/java/android/bluetooth/le/TransportBlock.java b/core/java/android/bluetooth/le/TransportBlock.java
new file mode 100644
index 000000000000..b388beda6b3b
--- /dev/null
+++ b/core/java/android/bluetooth/le/TransportBlock.java
@@ -0,0 +1,155 @@
+/*
+ * Copyright (C) 2014 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.le;
+
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.os.Parcel;
+import android.os.Parcelable;
+import android.util.Log;
+
+import java.nio.BufferOverflowException;
+import java.nio.ByteBuffer;
+
+/**
+ * Wrapper for Transport Discovery Data Transport Blocks.
+ * This class represents a Transport Block from a Transport Discovery Data.
+ *
+ * @see TransportDiscoveryData
+ * @see AdvertiseData
+ */
+public final class TransportBlock implements Parcelable {
+    private static final String TAG = "TransportBlock";
+    private final int mOrgId;
+    private final int mTdsFlags;
+    private final int mTransportDataLength;
+    private final byte[] mTransportData;
+
+    /**
+     * Creates an instance of TransportBlock from raw data.
+     *
+     * @param orgId the Organization ID
+     * @param tdsFlags the TDS flags
+     * @param transportDataLength the total length of the Transport Data
+     * @param transportData the Transport Data
+     */
+    public TransportBlock(int orgId, int tdsFlags, int transportDataLength,
+            @Nullable byte[] transportData) {
+        mOrgId = orgId;
+        mTdsFlags = tdsFlags;
+        mTransportDataLength = transportDataLength;
+        mTransportData = transportData;
+    }
+
+    private TransportBlock(Parcel in) {
+        mOrgId = in.readInt();
+        mTdsFlags = in.readInt();
+        mTransportDataLength = in.readInt();
+        mTransportData = new byte[mTransportDataLength];
+        in.readByteArray(mTransportData);
+    }
+
+    @Override
+    public void writeToParcel(@NonNull Parcel dest, int flags) {
+        dest.writeInt(mOrgId);
+        dest.writeInt(mTdsFlags);
+        dest.writeInt(mTransportDataLength);
+        dest.writeByteArray(mTransportData);
+    }
+
+    /**
+     * @hide
+     */
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    public static final @NonNull Creator<TransportBlock> CREATOR = new Creator<TransportBlock>() {
+        @Override
+        public TransportBlock createFromParcel(Parcel in) {
+            return new TransportBlock(in);
+        }
+
+        @Override
+        public TransportBlock[] newArray(int size) {
+            return new TransportBlock[size];
+        }
+    };
+
+    /**
+     * Gets the Organization ID of the Transport Block which corresponds to one of the
+     * the Bluetooth SIG Assigned Numbers.
+     */
+    public int getOrgId() {
+        return mOrgId;
+    }
+
+    /**
+     * Gets the TDS flags of the Transport Block which represents the role of the device and
+     * information about its state and supported features.
+     */
+    public int getTdsFlags() {
+        return mTdsFlags;
+    }
+
+    /**
+     * Gets the total number of octets in the Transport Data field in this Transport Block.
+     */
+    public int getTransportDataLength() {
+        return mTransportDataLength;
+    }
+
+    /**
+     * Gets the Transport Data of the Transport Block which contains organization-specific data.
+     */
+    @Nullable
+    public byte[] getTransportData() {
+        return mTransportData;
+    }
+
+    /**
+     * Converts this TransportBlock to byte array
+     *
+     * @return byte array representation of this Transport Block or null if the conversion failed
+     */
+    @Nullable
+    public byte[] toByteArray() {
+        try {
+            ByteBuffer buffer = ByteBuffer.allocate(totalBytes());
+            buffer.put((byte) mOrgId);
+            buffer.put((byte) mTdsFlags);
+            buffer.put((byte) mTransportDataLength);
+            if (mTransportData != null) {
+                buffer.put(mTransportData);
+            }
+            return buffer.array();
+        } catch (BufferOverflowException e) {
+            Log.e(TAG, "Error converting to byte array: " + e.toString());
+            return null;
+        }
+    }
+
+    /**
+     * @return total byte count of this TransportBlock
+     */
+    public int totalBytes() {
+        // 3 uint8 + byte[] length
+        int size = 3 + mTransportDataLength;
+        return size;
+    }
+}
diff --git a/core/java/android/bluetooth/le/TransportDiscoveryData.java b/core/java/android/bluetooth/le/TransportDiscoveryData.java
new file mode 100644
index 000000000000..c8e97f9a823a
--- /dev/null
+++ b/core/java/android/bluetooth/le/TransportDiscoveryData.java
@@ -0,0 +1,168 @@
+/*
+ * Copyright (C) 2014 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.le;
+
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.os.Parcel;
+import android.os.Parcelable;
+import android.util.Log;
+
+import java.nio.BufferOverflowException;
+import java.nio.BufferUnderflowException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+/**
+ * Wrapper for Transport Discovery Data AD Type.
+ * This class contains the Transport Discovery Data AD Type Code as well as
+ * a list of potential Transport Blocks.
+ *
+ * @see AdvertiseData
+ */
+public final class TransportDiscoveryData implements Parcelable {
+    private static final String TAG = "TransportDiscoveryData";
+    private final int mTransportDataType;
+    private final List<TransportBlock> mTransportBlocks;
+
+    /**
+     * Creates a TransportDiscoveryData instance.
+     *
+     * @param transportDataType the Transport Discovery Data AD Type
+     * @param transportBlocks the list of Transport Blocks
+     */
+    public TransportDiscoveryData(int transportDataType,
+            @NonNull List<TransportBlock> transportBlocks) {
+        mTransportDataType = transportDataType;
+        mTransportBlocks = transportBlocks;
+    }
+
+    /**
+     * Creates a TransportDiscoveryData instance from byte arrays.
+     *
+     * Uses the transport discovery data bytes and parses them into an usable class.
+     *
+     * @param transportDiscoveryData the raw discovery data
+     */
+    public TransportDiscoveryData(@NonNull byte[] transportDiscoveryData) {
+        ByteBuffer byteBuffer = ByteBuffer.wrap(transportDiscoveryData);
+        mTransportBlocks = new ArrayList();
+        if (byteBuffer.remaining() > 0) {
+            mTransportDataType = byteBuffer.get();
+        } else {
+            mTransportDataType = -1;
+        }
+        try {
+            while (byteBuffer.remaining() > 0) {
+                int orgId = byteBuffer.get();
+                int tdsFlags = byteBuffer.get();
+                int transportDataLength = byteBuffer.get();
+                byte[] transportData = new byte[transportDataLength];
+                byteBuffer.get(transportData, 0, transportDataLength);
+                mTransportBlocks.add(new TransportBlock(orgId, tdsFlags,
+                        transportDataLength, transportData));
+            }
+        } catch (BufferUnderflowException e) {
+            Log.e(TAG, "Error while parsing data: " + e.toString());
+        }
+    }
+
+    private TransportDiscoveryData(Parcel in) {
+        mTransportDataType = in.readInt();
+        mTransportBlocks = in.createTypedArrayList(TransportBlock.CREATOR);
+    }
+
+    /**
+     * @hide
+     */
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @Override
+    public void writeToParcel(@NonNull Parcel dest, int flags) {
+        dest.writeInt(mTransportDataType);
+        dest.writeTypedList(mTransportBlocks);
+    }
+
+    public static final @NonNull Creator<TransportDiscoveryData> CREATOR =
+            new Creator<TransportDiscoveryData>() {
+                @Override
+                public TransportDiscoveryData createFromParcel(Parcel in) {
+                    return new TransportDiscoveryData(in);
+                }
+
+                @Override
+                public TransportDiscoveryData[] newArray(int size) {
+                    return new TransportDiscoveryData[size];
+                }
+    };
+
+    /**
+     * Gets the transport data type.
+     */
+    public int getTransportDataType() {
+        return mTransportDataType;
+    }
+
+    /**
+     * @return the list of {@link TransportBlock} in this TransportDiscoveryData
+     *         or an empty list if there are no Transport Blocks
+     */
+    @NonNull
+    public List<TransportBlock> getTransportBlocks() {
+        if (mTransportBlocks == null) {
+            return Collections.emptyList();
+        }
+        return mTransportBlocks;
+    }
+
+    /**
+     * Converts this TransportDiscoveryData to byte array
+     *
+     * @return byte array representation of this Transport Discovery Data or null if the
+     *         conversion failed
+     */
+    @Nullable
+    public byte[] toByteArray() {
+        try {
+            ByteBuffer buffer = ByteBuffer.allocate(totalBytes());
+            buffer.put((byte) mTransportDataType);
+            for (TransportBlock transportBlock : getTransportBlocks()) {
+                buffer.put(transportBlock.toByteArray());
+            }
+            return buffer.array();
+        } catch (BufferOverflowException e) {
+            Log.e(TAG, "Error converting to byte array: " + e.toString());
+            return null;
+        }
+    }
+
+    /**
+     * @return total byte count of this TransportDataDiscovery
+     */
+    public int totalBytes() {
+        int size = 1; // Counting Transport Data Type here.
+        for (TransportBlock transportBlock : getTransportBlocks()) {
+            size += transportBlock.totalBytes();
+        }
+        return size;
+    }
+}