| /* |
| * Copyright (C) 2012 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.FlaggedApi; |
| import android.annotation.RequiresNoPermission; |
| import android.annotation.RequiresPermission; |
| import android.annotation.SystemApi; |
| import android.bluetooth.annotations.RequiresBluetoothConnectPermission; |
| import android.compat.annotation.UnsupportedAppUsage; |
| import android.content.AttributionSource; |
| import android.net.LocalSocket; |
| import android.os.Build; |
| import android.os.ParcelFileDescriptor; |
| import android.os.ParcelUuid; |
| import android.os.RemoteException; |
| import android.util.Log; |
| |
| import com.android.bluetooth.flags.Flags; |
| |
| import java.io.Closeable; |
| import java.io.FileDescriptor; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| import java.nio.ByteBuffer; |
| import java.nio.ByteOrder; |
| import java.util.Arrays; |
| import java.util.Locale; |
| import java.util.UUID; |
| |
| /** |
| * A connected or connecting Bluetooth socket. |
| * |
| * <p>The interface for Bluetooth Sockets is similar to that of TCP sockets: {@link java.net.Socket} |
| * and {@link java.net.ServerSocket}. On the server side, use a {@link BluetoothServerSocket} to |
| * create a listening server socket. When a connection is accepted by the {@link |
| * BluetoothServerSocket}, it will return a new {@link BluetoothSocket} to manage the connection. On |
| * the client side, use a single {@link BluetoothSocket} to both initiate an outgoing connection and |
| * to manage the connection. |
| * |
| * <p>The most common type of Bluetooth socket is RFCOMM, which is the type supported by the Android |
| * APIs. RFCOMM is a connection-oriented, streaming transport over Bluetooth. It is also known as |
| * the Serial Port Profile (SPP). |
| * |
| * <p>To create a {@link BluetoothSocket} for connecting to a known device, use {@link |
| * BluetoothDevice#createRfcommSocketToServiceRecord |
| * BluetoothDevice.createRfcommSocketToServiceRecord()}. Then call {@link #connect()} to attempt a |
| * connection to the remote device. This call will block until a connection is established or the |
| * connection fails. |
| * |
| * <p>To create a {@link BluetoothSocket} as a server (or "host"), see the {@link |
| * BluetoothServerSocket} documentation. |
| * |
| * <p>Once the socket is connected, whether initiated as a client or accepted as a server, open the |
| * IO streams by calling {@link #getInputStream} and {@link #getOutputStream} in order to retrieve |
| * {@link java.io.InputStream} and {@link java.io.OutputStream} objects, respectively, which are |
| * automatically connected to the socket. |
| * |
| * <p>{@link BluetoothSocket} is thread safe. In particular, {@link #close} will always immediately |
| * abort ongoing operations and close the socket. |
| * |
| * <p><div class="special reference"> |
| * |
| * <h3>Developer Guides</h3> |
| * |
| * <p>For more information about using Bluetooth, read the <a |
| * href="{@docRoot}guide/topics/connectivity/bluetooth.html">Bluetooth</a> developer guide. </div> |
| * |
| * @see BluetoothServerSocket |
| * @see java.io.InputStream |
| * @see java.io.OutputStream |
| */ |
| public final class BluetoothSocket implements Closeable { |
| private static final String TAG = "BluetoothSocket"; |
| private static final boolean DBG = Log.isLoggable(TAG, Log.DEBUG); |
| private static final boolean VDBG = Log.isLoggable(TAG, Log.VERBOSE); |
| |
| /** @hide */ |
| public static final int MAX_RFCOMM_CHANNEL = 30; |
| |
| /*package*/ static final int MAX_L2CAP_PACKAGE_SIZE = 0xFFFF; |
| |
| /** RFCOMM socket */ |
| public static final int TYPE_RFCOMM = 1; |
| |
| /** SCO socket */ |
| public static final int TYPE_SCO = 2; |
| |
| /** L2CAP socket */ |
| public static final int TYPE_L2CAP = 3; |
| |
| /** |
| * L2CAP socket on BR/EDR transport |
| * |
| * @hide |
| */ |
| public static final int TYPE_L2CAP_BREDR = TYPE_L2CAP; |
| |
| /** |
| * L2CAP socket on LE transport |
| * |
| * @hide |
| */ |
| public static final int TYPE_L2CAP_LE = 4; |
| |
| /*package*/ static final int EBADFD = 77; |
| |
| @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553) |
| /*package*/ static final int EADDRINUSE = 98; |
| |
| /*package*/ static final int SEC_FLAG_ENCRYPT = 1; |
| /*package*/ static final int SEC_FLAG_AUTH = 1 << 1; |
| /*package*/ static final int BTSOCK_FLAG_NO_SDP = 1 << 2; |
| /*package*/ static final int SEC_FLAG_AUTH_MITM = 1 << 3; |
| /*package*/ static final int SEC_FLAG_AUTH_16_DIGIT = 1 << 4; |
| |
| private final int mType; /* one of TYPE_RFCOMM etc */ |
| private BluetoothDevice mDevice; /* remote device */ |
| private String mAddress; /* remote address */ |
| private final boolean mAuth; |
| private final boolean mEncrypt; |
| private final BluetoothInputStream mInputStream; |
| private final BluetoothOutputStream mOutputStream; |
| private final ParcelUuid mUuid; |
| |
| /** when true no SPP SDP record will be created */ |
| private boolean mExcludeSdp = false; |
| |
| /** when true Person-in-the-middle protection will be enabled */ |
| private boolean mAuthMitm = false; |
| |
| /** Minimum 16 digit pin for sec mode 2 connections */ |
| private boolean mMin16DigitPin = false; |
| |
| @UnsupportedAppUsage(publicAlternatives = "Use {@link BluetoothSocket} public API instead.") |
| private ParcelFileDescriptor mPfd; |
| |
| @UnsupportedAppUsage private LocalSocket mSocket; |
| private InputStream mSocketIS; |
| private OutputStream mSocketOS; |
| @UnsupportedAppUsage private int mPort; /* RFCOMM channel or L2CAP psm */ |
| private String mServiceName; |
| |
| private static final int SOCK_SIGNAL_SIZE = 36; |
| |
| private ByteBuffer mL2capBuffer = null; |
| private int mMaxTxPacketSize = 0; // The l2cap maximum packet size supported by the peer. |
| private int mMaxRxPacketSize = 0; // The l2cap maximum packet size that can be received. |
| private ParcelUuid mConnectionUuid; |
| |
| private long mSocketCreationTimeNanos = 0; |
| private long mSocketCreationLatencyNanos = 0; |
| |
| private enum SocketState { |
| INIT, |
| CONNECTED, |
| LISTENING, |
| CLOSED, |
| } |
| |
| /** prevents all native calls after destroyNative() */ |
| private volatile SocketState mSocketState; |
| |
| /** protects mSocketState */ |
| // private final ReentrantReadWriteLock mLock; |
| |
| /** |
| * Construct a BluetoothSocket. |
| * |
| * @param type type of socket |
| * @param auth require the remote device to be authenticated |
| * @param encrypt require the connection to be encrypted |
| * @param device remote device that this socket can connect to |
| * @param port remote port |
| * @param uuid SDP uuid |
| * @throws IOException On error, for example Bluetooth not available, or insufficient privileges |
| */ |
| /*package*/ BluetoothSocket( |
| int type, |
| boolean auth, |
| boolean encrypt, |
| BluetoothDevice device, |
| int port, |
| ParcelUuid uuid) |
| throws IOException { |
| this(type, auth, encrypt, device, port, uuid, false, false); |
| } |
| |
| /** |
| * Construct a BluetoothSocket. |
| * |
| * @param type type of socket |
| * @param auth require the remote device to be authenticated |
| * @param encrypt require the connection to be encrypted |
| * @param device remote device that this socket can connect to |
| * @param port remote port |
| * @param uuid SDP uuid |
| * @param mitm enforce person-in-the-middle protection. |
| * @param min16DigitPin enforce a minimum length of 16 digits for a sec mode 2 connection |
| * @throws IOException On error, for example Bluetooth not available, or insufficient privileges |
| */ |
| /*package*/ BluetoothSocket( |
| int type, |
| boolean auth, |
| boolean encrypt, |
| BluetoothDevice device, |
| int port, |
| ParcelUuid uuid, |
| boolean mitm, |
| boolean min16DigitPin) |
| throws IOException { |
| if (VDBG) Log.d(TAG, "Creating new BluetoothSocket of type: " + type); |
| mSocketCreationTimeNanos = System.nanoTime(); |
| if (type == BluetoothSocket.TYPE_RFCOMM |
| && uuid == null |
| && port != BluetoothAdapter.SOCKET_CHANNEL_AUTO_STATIC_NO_SDP) { |
| if (port < 1 || port > MAX_RFCOMM_CHANNEL) { |
| throw new IOException("Invalid RFCOMM channel: " + port); |
| } |
| } |
| if (uuid != null) { |
| mUuid = uuid; |
| } else { |
| mUuid = new ParcelUuid(new UUID(0, 0)); |
| } |
| mType = type; |
| mAuth = auth; |
| mAuthMitm = mitm; |
| mMin16DigitPin = min16DigitPin; |
| mEncrypt = encrypt; |
| mDevice = device; |
| mPort = port; |
| |
| mSocketState = SocketState.INIT; |
| |
| if (device == null) { |
| // Server socket |
| mAddress = BluetoothAdapter.getDefaultAdapter().getAddress(); |
| } else { |
| // Remote socket |
| mAddress = device.getAddress(); |
| } |
| mInputStream = new BluetoothInputStream(this); |
| mOutputStream = new BluetoothOutputStream(this); |
| mSocketCreationLatencyNanos = System.nanoTime() - mSocketCreationTimeNanos; |
| } |
| |
| /** |
| * Creates a BluetoothSocket from a {@link ParcelFileDescriptor}. This is used for when the |
| * underlying mPfd is transferred to a separate process (e.g. over a binder), and the socket |
| * must be reconstructed. |
| * |
| * <p>The socket should already be connected in this case, so {@link #connect()} should not be |
| * called. |
| * |
| * @param pfd is the {@link ParcelFileDescriptor} for an already connected BluetoothSocket |
| * @param device is the remote {@link BluetoothDevice} that this socket is connected to |
| * @param uuid is the service ID that this RFCOMM connection is using |
| * @throws IOException if socket creation fails. |
| */ |
| /*package*/ static BluetoothSocket createSocketFromOpenFd( |
| ParcelFileDescriptor pfd, BluetoothDevice device, ParcelUuid uuid) throws IOException { |
| BluetoothSocket bluetoothSocket = |
| new BluetoothSocket(TYPE_RFCOMM, true, true, device, -1, uuid); |
| |
| bluetoothSocket.mPfd = pfd; |
| bluetoothSocket.mSocket = new LocalSocket(pfd.getFileDescriptor()); |
| bluetoothSocket.mSocketIS = bluetoothSocket.mSocket.getInputStream(); |
| bluetoothSocket.mSocketOS = bluetoothSocket.mSocket.getOutputStream(); |
| bluetoothSocket.mSocketState = SocketState.CONNECTED; |
| |
| return bluetoothSocket; |
| } |
| |
| private BluetoothSocket(BluetoothSocket s) { |
| if (VDBG) Log.d(TAG, "Creating new Private BluetoothSocket of type: " + s.mType); |
| mUuid = s.mUuid; |
| mType = s.mType; |
| mAuth = s.mAuth; |
| mEncrypt = s.mEncrypt; |
| mPort = s.mPort; |
| mInputStream = new BluetoothInputStream(this); |
| mOutputStream = new BluetoothOutputStream(this); |
| mMaxRxPacketSize = s.mMaxRxPacketSize; |
| mMaxTxPacketSize = s.mMaxTxPacketSize; |
| mConnectionUuid = s.mConnectionUuid; |
| |
| mServiceName = s.mServiceName; |
| mExcludeSdp = s.mExcludeSdp; |
| mAuthMitm = s.mAuthMitm; |
| mMin16DigitPin = s.mMin16DigitPin; |
| mSocketCreationTimeNanos = s.mSocketCreationTimeNanos; |
| mSocketCreationLatencyNanos = s.mSocketCreationLatencyNanos; |
| } |
| |
| private BluetoothSocket acceptSocket(String remoteAddr) throws IOException { |
| BluetoothSocket as = new BluetoothSocket(this); |
| as.mSocketState = SocketState.CONNECTED; |
| FileDescriptor[] fds = mSocket.getAncillaryFileDescriptors(); |
| if (DBG) Log.d(TAG, "acceptSocket: socket fd passed by stack fds:" + Arrays.toString(fds)); |
| if (fds == null || fds.length != 1) { |
| Log.e(TAG, "socket fd passed from stack failed, fds: " + Arrays.toString(fds)); |
| as.close(); |
| throw new IOException("bt socket accept failed"); |
| } |
| |
| as.mPfd = ParcelFileDescriptor.dup(fds[0]); |
| as.mSocket = new LocalSocket(fds[0]); |
| as.mSocketIS = as.mSocket.getInputStream(); |
| as.mSocketOS = as.mSocket.getOutputStream(); |
| as.mAddress = remoteAddr; |
| as.mDevice = BluetoothAdapter.getDefaultAdapter().getRemoteDevice(remoteAddr); |
| return as; |
| } |
| |
| /** @hide */ |
| @Override |
| @SuppressWarnings("Finalize") // TODO(b/314811467) |
| protected void finalize() throws Throwable { |
| try { |
| close(); |
| } finally { |
| super.finalize(); |
| } |
| } |
| |
| private int getSecurityFlags() { |
| int flags = 0; |
| if (mAuth) { |
| flags |= SEC_FLAG_AUTH; |
| } |
| if (mEncrypt) { |
| flags |= SEC_FLAG_ENCRYPT; |
| } |
| if (mExcludeSdp) { |
| flags |= BTSOCK_FLAG_NO_SDP; |
| } |
| if (mAuthMitm) { |
| flags |= SEC_FLAG_AUTH_MITM; |
| } |
| if (mMin16DigitPin) { |
| flags |= SEC_FLAG_AUTH_16_DIGIT; |
| } |
| return flags; |
| } |
| |
| /** |
| * Get the remote device this socket is connecting, or connected, to. |
| * |
| * @return remote device |
| */ |
| @RequiresNoPermission |
| public BluetoothDevice getRemoteDevice() { |
| return mDevice; |
| } |
| |
| /** |
| * Get the input stream associated with this socket. |
| * |
| * <p>The input stream will be returned even if the socket is not yet connected, but operations |
| * on that stream will throw IOException until the associated socket is connected. |
| * |
| * @return InputStream |
| */ |
| @RequiresNoPermission |
| public InputStream getInputStream() throws IOException { |
| return mInputStream; |
| } |
| |
| /** |
| * Get the output stream associated with this socket. |
| * |
| * <p>The output stream will be returned even if the socket is not yet connected, but operations |
| * on that stream will throw IOException until the associated socket is connected. |
| * |
| * @return OutputStream |
| */ |
| @RequiresNoPermission |
| public OutputStream getOutputStream() throws IOException { |
| return mOutputStream; |
| } |
| |
| /** |
| * Get the connection status of this socket, ie, whether there is an active connection with |
| * remote device. |
| * |
| * @return true if connected false if not connected |
| */ |
| @RequiresNoPermission |
| public boolean isConnected() { |
| return mSocketState == SocketState.CONNECTED; |
| } |
| |
| /*package*/ void setServiceName(String name) { |
| mServiceName = name; |
| } |
| |
| /*package*/ boolean isAuth() { |
| return mAuth; |
| } |
| |
| /** |
| * Attempt to connect to a remote device. |
| * |
| * <p>This method will block until a connection is made or the connection fails. If this method |
| * returns without an exception then this socket is now connected. |
| * |
| * <p>Creating new connections to remote Bluetooth devices should not be attempted while device |
| * discovery is in progress. Device discovery is a heavyweight procedure on the Bluetooth |
| * adapter and will significantly slow a device connection. Use {@link |
| * BluetoothAdapter#cancelDiscovery()} to cancel an ongoing discovery. Discovery is not managed |
| * by the Activity, but is run as a system service, so an application should always call {@link |
| * BluetoothAdapter#cancelDiscovery()} even if it did not directly request a discovery, just to |
| * be sure. |
| * |
| * <p>{@link #close} can be used to abort this call from another thread. |
| * |
| * @throws BluetoothSocketException in case of failure, with the corresponding error code. |
| * @throws IOException for other errors (eg: InputStream read failures etc.). |
| */ |
| @RequiresBluetoothConnectPermission |
| @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT) |
| public void connect() throws IOException { |
| IBluetooth bluetoothProxy = BluetoothAdapter.getDefaultAdapter().getBluetoothService(); |
| long socketConnectionTimeNanos = System.nanoTime(); |
| if (bluetoothProxy == null) { |
| throw new BluetoothSocketException(BluetoothSocketException.BLUETOOTH_OFF_FAILURE); |
| } |
| try { |
| if (mDevice == null) { |
| throw new BluetoothSocketException(BluetoothSocketException.NULL_DEVICE); |
| } |
| if (mSocketState == SocketState.CLOSED) { |
| throw new BluetoothSocketException(BluetoothSocketException.SOCKET_CLOSED); |
| } |
| |
| IBluetoothSocketManager socketManager = bluetoothProxy.getSocketManager(); |
| if (socketManager == null) { |
| throw new BluetoothSocketException(BluetoothSocketException.SOCKET_MANAGER_FAILURE); |
| } |
| mPfd = socketManager.connectSocket(mDevice, mType, mUuid, mPort, getSecurityFlags()); |
| synchronized (this) { |
| Log.i(TAG, "connect(), SocketState: " + mSocketState + ", mPfd: " + mPfd); |
| if (mSocketState == SocketState.CLOSED) { |
| throw new BluetoothSocketException( |
| BluetoothSocketException.SOCKET_CLOSED); |
| } |
| if (mPfd == null) { |
| throw new BluetoothSocketException( |
| BluetoothSocketException.UNIX_FILE_SOCKET_CREATION_FAILURE); |
| } |
| FileDescriptor fd = mPfd.getFileDescriptor(); |
| mSocket = new LocalSocket(fd); |
| mSocketIS = mSocket.getInputStream(); |
| mSocketOS = mSocket.getOutputStream(); |
| } |
| int channel = readInt(mSocketIS); |
| if (channel == 0) { |
| int errCode = (int) mSocketIS.read(); |
| throw new BluetoothSocketException(errCode); |
| } |
| if (channel < 0) { |
| throw new BluetoothSocketException( |
| BluetoothSocketException.SOCKET_CONNECTION_FAILURE); |
| } |
| mPort = channel; |
| waitSocketSignal(mSocketIS); |
| synchronized (this) { |
| if (mSocketState == SocketState.CLOSED) { |
| throw new BluetoothSocketException(BluetoothSocketException.SOCKET_CLOSED); |
| } |
| mSocketState = SocketState.CONNECTED; |
| Log.i(TAG, "connect(), socket connected. mPort=" + mPort); |
| } |
| } catch (BluetoothSocketException e) { |
| SocketMetrics.logSocketConnect( |
| e.getErrorCode(), |
| socketConnectionTimeNanos, |
| mType, |
| mDevice, |
| mPort, |
| mAuth, |
| mSocketCreationTimeNanos, |
| mSocketCreationLatencyNanos); |
| throw e; |
| } catch (RemoteException e) { |
| Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable())); |
| SocketMetrics.logSocketConnect( |
| BluetoothSocketException.RPC_FAILURE, |
| socketConnectionTimeNanos, |
| mType, |
| mDevice, |
| mPort, |
| mAuth, |
| mSocketCreationTimeNanos, |
| mSocketCreationLatencyNanos); |
| throw new BluetoothSocketException( |
| BluetoothSocketException.RPC_FAILURE, "unable to send RPC: " + e.getMessage()); |
| } |
| SocketMetrics.logSocketConnect( |
| SocketMetrics.SOCKET_NO_ERROR, |
| socketConnectionTimeNanos, |
| mType, |
| mDevice, |
| mPort, |
| mAuth, |
| mSocketCreationTimeNanos, |
| mSocketCreationLatencyNanos); |
| } |
| |
| /** |
| * Currently returns unix errno instead of throwing IOException, so that BluetoothAdapter can |
| * check the error code for EADDRINUSE |
| */ |
| @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT) |
| /*package*/ int bindListen() { |
| int ret; |
| if (mSocketState == SocketState.CLOSED) return EBADFD; |
| IBluetooth bluetoothProxy = BluetoothAdapter.getDefaultAdapter().getBluetoothService(); |
| if (bluetoothProxy == null) { |
| Log.e(TAG, "bindListen fail, reason: bluetooth is off"); |
| return -1; |
| } |
| try { |
| if (DBG) Log.d(TAG, "bindListen(): mPort=" + mPort + ", mType=" + mType); |
| IBluetoothSocketManager socketManager = bluetoothProxy.getSocketManager(); |
| if (socketManager == null) { |
| Log.e(TAG, "bindListen() bt get socket manager failed"); |
| return -1; |
| } |
| mPfd = |
| socketManager.createSocketChannel( |
| mType, mServiceName, mUuid, mPort, getSecurityFlags()); |
| } catch (RemoteException e) { |
| Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable())); |
| return -1; |
| } |
| |
| // read out port number |
| try { |
| synchronized (this) { |
| if (DBG) { |
| Log.d(TAG, "bindListen(), SocketState: " + mSocketState + ", mPfd: " + mPfd); |
| } |
| if (mSocketState != SocketState.INIT) return EBADFD; |
| if (mPfd == null) return -1; |
| FileDescriptor fd = mPfd.getFileDescriptor(); |
| if (fd == null) { |
| Log.e(TAG, "bindListen(), null file descriptor"); |
| return -1; |
| } |
| |
| if (DBG) Log.d(TAG, "bindListen(), Create LocalSocket"); |
| mSocket = new LocalSocket(fd); |
| if (DBG) Log.d(TAG, "bindListen(), new LocalSocket.getInputStream()"); |
| mSocketIS = mSocket.getInputStream(); |
| mSocketOS = mSocket.getOutputStream(); |
| } |
| if (DBG) Log.d(TAG, "bindListen(), readInt mSocketIS: " + mSocketIS); |
| int channel = readInt(mSocketIS); |
| synchronized (this) { |
| if (mSocketState == SocketState.INIT) { |
| mSocketState = SocketState.LISTENING; |
| } |
| } |
| if (DBG) Log.d(TAG, "bindListen(): channel=" + channel + ", mPort=" + mPort); |
| if (mPort <= -1) { |
| mPort = channel; |
| } // else ASSERT(mPort == channel) |
| ret = 0; |
| } catch (IOException e) { |
| if (mPfd != null) { |
| try { |
| mPfd.close(); |
| } catch (IOException e1) { |
| Log.e(TAG, "bindListen, close mPfd: " + e1); |
| } |
| mPfd = null; |
| } |
| Log.e(TAG, "bindListen, fail to get port number, exception: " + e); |
| return -1; |
| } |
| return ret; |
| } |
| |
| /*package*/ BluetoothSocket accept(int timeout) throws IOException { |
| BluetoothSocket acceptedSocket; |
| if (mSocketState != SocketState.LISTENING) { |
| throw new IOException("bt socket is not in listen state"); |
| } |
| Log.d(TAG, "accept(), timeout (ms):" + timeout); |
| if (timeout > 0) { |
| mSocket.setSoTimeout(timeout); |
| } |
| String RemoteAddr = waitSocketSignal(mSocketIS); |
| if (timeout > 0) { |
| mSocket.setSoTimeout(0); |
| } |
| synchronized (this) { |
| if (mSocketState != SocketState.LISTENING) { |
| throw new IOException("bt socket is not in listen state"); |
| } |
| acceptedSocket = acceptSocket(RemoteAddr); |
| // quick drop the reference of the file handle |
| } |
| return acceptedSocket; |
| } |
| |
| /*package*/ int available() throws IOException { |
| if (VDBG) Log.d(TAG, "available: " + mSocketIS); |
| return mSocketIS.available(); |
| } |
| |
| /*package*/ int read(byte[] b, int offset, int length) throws IOException { |
| int ret = 0; |
| if (VDBG) Log.d(TAG, "read in: " + mSocketIS + " len: " + length); |
| if ((mType == TYPE_L2CAP) || (mType == TYPE_L2CAP_LE)) { |
| int bytesToRead = length; |
| if (VDBG) { |
| Log.v( |
| TAG, |
| "l2cap: read(): offset: " |
| + offset |
| + " length:" |
| + length |
| + "mL2capBuffer= " |
| + mL2capBuffer); |
| } |
| if (mL2capBuffer == null) { |
| createL2capRxBuffer(); |
| } |
| if (mL2capBuffer.remaining() == 0) { |
| if (VDBG) Log.v(TAG, "l2cap buffer empty, refilling..."); |
| if (fillL2capRxBuffer() == -1) { |
| return -1; |
| } |
| } |
| if (bytesToRead > mL2capBuffer.remaining()) { |
| bytesToRead = mL2capBuffer.remaining(); |
| } |
| if (VDBG) { |
| Log.v(TAG, "get(): offset: " + offset + " bytesToRead: " + bytesToRead); |
| } |
| mL2capBuffer.get(b, offset, bytesToRead); |
| ret = bytesToRead; |
| } else { |
| if (VDBG) Log.v(TAG, "default: read(): offset: " + offset + " length:" + length); |
| ret = mSocketIS.read(b, offset, length); |
| } |
| if (ret < 0) { |
| throw new IOException("bt socket closed, read return: " + ret); |
| } |
| if (VDBG) Log.d(TAG, "read out: " + mSocketIS + " ret: " + ret); |
| return ret; |
| } |
| |
| /*package*/ int write(byte[] b, int offset, int length) throws IOException { |
| |
| // TODO: Since bindings can exist between the SDU size and the |
| // protocol, we might need to throw an exception instead of just |
| // splitting the write into multiple smaller writes. |
| // Rfcomm uses dynamic allocation, and should not have any bindings |
| // to the actual message length. |
| if (VDBG) Log.d(TAG, "write: " + mSocketOS + " length: " + length); |
| if ((mType == TYPE_L2CAP) || (mType == TYPE_L2CAP_LE)) { |
| if (length <= mMaxTxPacketSize) { |
| mSocketOS.write(b, offset, length); |
| } else { |
| if (DBG) { |
| Log.w( |
| TAG, |
| "WARNING: Write buffer larger than L2CAP packet size!\n" |
| + "Packet will be divided into SDU packets of size " |
| + mMaxTxPacketSize); |
| } |
| int tmpOffset = offset; |
| int bytesToWrite = length; |
| while (bytesToWrite > 0) { |
| int tmpLength = |
| (bytesToWrite > mMaxTxPacketSize) ? mMaxTxPacketSize : bytesToWrite; |
| mSocketOS.write(b, tmpOffset, tmpLength); |
| tmpOffset += tmpLength; |
| bytesToWrite -= tmpLength; |
| } |
| } |
| } else { |
| mSocketOS.write(b, offset, length); |
| } |
| // There is no good way to confirm since the entire process is asynchronous anyway |
| if (VDBG) Log.d(TAG, "write out: " + mSocketOS + " length: " + length); |
| return length; |
| } |
| |
| @Override |
| public void close() throws IOException { |
| Log.d( |
| TAG, |
| "close() this: " |
| + this |
| + ", channel: " |
| + mPort |
| + ", mSocketIS: " |
| + mSocketIS |
| + ", mSocketOS: " |
| + mSocketOS |
| + ", mSocket: " |
| + mSocket |
| + ", mSocketState: " |
| + mSocketState); |
| if (mSocketState == SocketState.CLOSED) { |
| return; |
| } else { |
| synchronized (this) { |
| if (mSocketState == SocketState.CLOSED) { |
| return; |
| } |
| mSocketState = SocketState.CLOSED; |
| if (mSocket != null) { |
| if (DBG) Log.d(TAG, "Closing mSocket: " + mSocket); |
| mSocket.shutdownInput(); |
| mSocket.shutdownOutput(); |
| mSocket.close(); |
| mSocket = null; |
| } |
| if (mPfd != null) { |
| mPfd.close(); |
| mPfd = null; |
| } |
| mConnectionUuid = null; |
| } |
| } |
| } |
| |
| /*package */ void removeChannel() {} |
| |
| /*package */ int getPort() { |
| return mPort; |
| } |
| |
| /*package */ long getSocketCreationTime() { |
| return mSocketCreationTimeNanos; |
| } |
| |
| /** |
| * Get the maximum supported Transmit packet size for the underlying transport. Use this to |
| * optimize the writes done to the output socket, to avoid sending half full packets. |
| * |
| * @return the maximum supported Transmit packet size for the underlying transport. |
| */ |
| @RequiresNoPermission |
| public int getMaxTransmitPacketSize() { |
| return mMaxTxPacketSize; |
| } |
| |
| /** |
| * Get the maximum supported Receive packet size for the underlying transport. Use this to |
| * optimize the reads done on the input stream, as any call to read will return a maximum of |
| * this amount of bytes - or for some transports a multiple of this value. |
| * |
| * @return the maximum supported Receive packet size for the underlying transport. |
| */ |
| @RequiresNoPermission |
| public int getMaxReceivePacketSize() { |
| return mMaxRxPacketSize; |
| } |
| |
| /** |
| * Get the type of the underlying connection. |
| * |
| * @return one of {@link #TYPE_RFCOMM}, {@link #TYPE_SCO} or {@link #TYPE_L2CAP} |
| */ |
| @RequiresNoPermission |
| public int getConnectionType() { |
| if (mType == TYPE_L2CAP_LE) { |
| // Treat the LE CoC to be the same type as L2CAP. |
| return TYPE_L2CAP; |
| } |
| return mType; |
| } |
| |
| /** |
| * Change if a SDP entry should be automatically created. Must be called before calling .bind, |
| * for the call to have any effect. |
| * |
| * @param excludeSdp |
| * <li>TRUE - do not auto generate SDP record. |
| * <li>FALSE - default - auto generate SPP SDP record. |
| * @hide |
| */ |
| @RequiresNoPermission |
| public void setExcludeSdp(boolean excludeSdp) { |
| mExcludeSdp = excludeSdp; |
| } |
| |
| /** |
| * Set the LE Transmit Data Length to be the maximum that the BT Controller is capable of. This |
| * parameter is used by the BT Controller to set the maximum transmission packet size on this |
| * connection. This function is currently used for testing only. |
| * |
| * @hide |
| */ |
| @RequiresBluetoothConnectPermission |
| @RequiresPermission(android.Manifest.permission.BLUETOOTH_CONNECT) |
| public void requestMaximumTxDataLength() throws IOException { |
| if (mDevice == null) { |
| throw new IOException("requestMaximumTxDataLength is called on null device"); |
| } |
| |
| try { |
| if (mSocketState == SocketState.CLOSED) { |
| throw new IOException("socket closed"); |
| } |
| IBluetooth bluetoothProxy = BluetoothAdapter.getDefaultAdapter().getBluetoothService(); |
| if (bluetoothProxy == null) { |
| throw new IOException("Bluetooth is off"); |
| } |
| |
| if (DBG) Log.d(TAG, "requestMaximumTxDataLength"); |
| IBluetoothSocketManager socketManager = bluetoothProxy.getSocketManager(); |
| if (socketManager == null) throw new IOException("bt get socket manager failed"); |
| socketManager.requestMaximumTxDataLength(mDevice); |
| } catch (RemoteException e) { |
| Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable())); |
| throw new IOException("unable to send RPC: " + e.getMessage()); |
| } |
| } |
| |
| /** |
| * Returns the L2CAP local channel ID associated with an open connection to this socket. |
| * |
| * @return the L2CAP local channel ID. |
| * @throws BluetoothSocketException in case of failure, with the corresponding error code. |
| * @hide |
| */ |
| @SystemApi |
| @FlaggedApi(Flags.FLAG_BT_SOCKET_API_L2CAP_CID) |
| @RequiresPermission( |
| allOf = { |
| android.Manifest.permission.BLUETOOTH_CONNECT, |
| android.Manifest.permission.BLUETOOTH_PRIVILEGED, |
| }) |
| public int getL2capLocalChannelId() throws IOException { |
| if (mType != TYPE_L2CAP_LE) { |
| throw new BluetoothSocketException(BluetoothSocketException.L2CAP_UNKNOWN); |
| } |
| if (mSocketState != SocketState.CONNECTED || mConnectionUuid == null) { |
| throw new BluetoothSocketException(BluetoothSocketException.SOCKET_CLOSED); |
| } |
| int cid; |
| IBluetooth bluetoothProxy = BluetoothAdapter.getDefaultAdapter().getBluetoothService(); |
| if (bluetoothProxy == null) { |
| throw new BluetoothSocketException(BluetoothSocketException.BLUETOOTH_OFF_FAILURE); |
| } |
| try { |
| IBluetoothSocketManager socketManager = bluetoothProxy.getSocketManager(); |
| if (socketManager == null) { |
| throw new BluetoothSocketException(BluetoothSocketException.SOCKET_MANAGER_FAILURE); |
| } |
| cid = |
| socketManager.getL2capLocalChannelId( |
| mConnectionUuid, AttributionSource.myAttributionSource()); |
| } catch (RemoteException e) { |
| Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable())); |
| throw new IOException("unable to send RPC: " + e.getMessage()); |
| } |
| if (cid == -1) { |
| throw new BluetoothSocketException(BluetoothSocketException.SOCKET_CLOSED); |
| } |
| return cid; |
| } |
| |
| /** |
| * Returns the L2CAP remote channel ID associated with an open connection to this socket. |
| * |
| * @return the L2CAP remote channel ID. |
| * @throws BluetoothSocketException in case of failure, with the corresponding error code. |
| * @hide |
| */ |
| @SystemApi |
| @FlaggedApi(Flags.FLAG_BT_SOCKET_API_L2CAP_CID) |
| @RequiresPermission( |
| allOf = { |
| android.Manifest.permission.BLUETOOTH_CONNECT, |
| android.Manifest.permission.BLUETOOTH_PRIVILEGED, |
| }) |
| public int getL2capRemoteChannelId() throws IOException { |
| if (mType != TYPE_L2CAP_LE) { |
| throw new BluetoothSocketException(BluetoothSocketException.L2CAP_UNKNOWN); |
| } |
| if (mSocketState != SocketState.CONNECTED || mConnectionUuid == null) { |
| throw new BluetoothSocketException(BluetoothSocketException.SOCKET_CLOSED); |
| } |
| int cid; |
| IBluetooth bluetoothProxy = BluetoothAdapter.getDefaultAdapter().getBluetoothService(); |
| if (bluetoothProxy == null) { |
| throw new BluetoothSocketException(BluetoothSocketException.BLUETOOTH_OFF_FAILURE); |
| } |
| try { |
| IBluetoothSocketManager socketManager = bluetoothProxy.getSocketManager(); |
| if (socketManager == null) { |
| throw new BluetoothSocketException(BluetoothSocketException.SOCKET_MANAGER_FAILURE); |
| } |
| cid = |
| socketManager.getL2capRemoteChannelId( |
| mConnectionUuid, AttributionSource.myAttributionSource()); |
| } catch (RemoteException e) { |
| Log.e(TAG, e.toString() + "\n" + Log.getStackTraceString(new Throwable())); |
| throw new IOException("unable to send RPC: " + e.getMessage()); |
| } |
| if (cid == -1) { |
| throw new BluetoothSocketException(BluetoothSocketException.SOCKET_CLOSED); |
| } |
| return cid; |
| } |
| |
| /** @hide */ |
| public ParcelFileDescriptor getParcelFileDescriptor() { |
| return mPfd; |
| } |
| |
| private String convertAddr(final byte[] addr) { |
| return String.format( |
| Locale.US, |
| "%02X:%02X:%02X:%02X:%02X:%02X", |
| addr[0], |
| addr[1], |
| addr[2], |
| addr[3], |
| addr[4], |
| addr[5]); |
| } |
| |
| private String waitSocketSignal(InputStream is) throws IOException { |
| byte[] sig = new byte[SOCK_SIGNAL_SIZE]; |
| int ret = readAll(is, sig); |
| if (VDBG) { |
| Log.d(TAG, "waitSocketSignal read " + SOCK_SIGNAL_SIZE + " bytes signal ret: " + ret); |
| } |
| ByteBuffer bb = ByteBuffer.wrap(sig); |
| /* the struct in native is decorated with __attribute__((packed)), hence this is possible */ |
| bb.order(ByteOrder.nativeOrder()); |
| int size = bb.getShort(); |
| if (size != SOCK_SIGNAL_SIZE) { |
| throw new IOException("Connection failure, wrong signal size: " + size); |
| } |
| byte[] addr = new byte[6]; |
| bb.get(addr); |
| int channel = bb.getInt(); |
| int status = bb.getInt(); |
| mMaxTxPacketSize = (bb.getShort() & 0xffff); // Convert to unsigned value |
| mMaxRxPacketSize = (bb.getShort() & 0xffff); // Convert to unsigned value |
| long uuidLsb = bb.getLong(); |
| long uuidMsb = bb.getLong(); |
| mConnectionUuid = new ParcelUuid(new UUID(uuidMsb, uuidLsb)); |
| String RemoteAddr = convertAddr(addr); |
| if (VDBG) { |
| Log.d( |
| TAG, |
| "waitSocketSignal: sig size: " |
| + size |
| + ", remote addr: " |
| + RemoteAddr |
| + ", channel: " |
| + channel |
| + ", status: " |
| + status |
| + " MaxRxPktSize: " |
| + mMaxRxPacketSize |
| + " MaxTxPktSize: " |
| + mMaxTxPacketSize |
| + " mConnectionUuid: " |
| + mConnectionUuid.toString()); |
| } |
| if (status != 0) { |
| throw new IOException("Connection failure, status: " + status); |
| } |
| return RemoteAddr; |
| } |
| |
| private void createL2capRxBuffer() { |
| if ((mType == TYPE_L2CAP) || (mType == TYPE_L2CAP_LE)) { |
| // Allocate the buffer to use for reads. |
| if (VDBG) Log.v(TAG, " Creating mL2capBuffer: mMaxPacketSize: " + mMaxRxPacketSize); |
| mL2capBuffer = ByteBuffer.wrap(new byte[mMaxRxPacketSize]); |
| if (VDBG) Log.v(TAG, "mL2capBuffer.remaining()" + mL2capBuffer.remaining()); |
| mL2capBuffer.limit(0); // Ensure we do a real read at the first read-request |
| if (VDBG) { |
| Log.v(TAG, "mL2capBuffer.remaining() after limit(0):" + mL2capBuffer.remaining()); |
| } |
| } |
| } |
| |
| private int readAll(InputStream is, byte[] b) throws IOException { |
| int left = b.length; |
| while (left > 0) { |
| int ret = is.read(b, b.length - left, left); |
| if (ret <= 0) { |
| throw new IOException( |
| "read failed, socket might closed or timeout, read ret: " + ret); |
| } |
| left -= ret; |
| if (left != 0) { |
| Log.w( |
| TAG, |
| "readAll() looping, read partial size: " |
| + (b.length - left) |
| + ", expect size: " |
| + b.length); |
| } |
| } |
| return b.length; |
| } |
| |
| private int readInt(InputStream is) throws IOException { |
| byte[] ibytes = new byte[4]; |
| int ret = readAll(is, ibytes); |
| if (VDBG) Log.d(TAG, "inputStream.read ret: " + ret); |
| ByteBuffer bb = ByteBuffer.wrap(ibytes); |
| bb.order(ByteOrder.nativeOrder()); |
| return bb.getInt(); |
| } |
| |
| private int fillL2capRxBuffer() throws IOException { |
| mL2capBuffer.rewind(); |
| int ret = mSocketIS.read(mL2capBuffer.array()); |
| if (ret == -1) { |
| // reached end of stream - return -1 |
| mL2capBuffer.limit(0); |
| return -1; |
| } |
| mL2capBuffer.limit(ret); |
| return ret; |
| } |
| |
| @Override |
| public String toString() { |
| return BluetoothUtils.toAnonymizedAddress(mAddress); |
| } |
| } |
