| /* |
| * 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.compat.annotation.UnsupportedAppUsage; |
| import android.net.LocalSocket; |
| import android.os.ParcelFileDescriptor; |
| import android.os.ParcelUuid; |
| import android.os.RemoteException; |
| import android.util.Log; |
| |
| 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 class="note"><strong>Note:</strong> |
| * Requires the {@link android.Manifest.permission#BLUETOOTH} permission. |
| * |
| * <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.</p> |
| * </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 |
| /*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; |
| private boolean mExcludeSdp = false; /* when true no SPP SDP record will be created */ |
| private boolean mAuthMitm = false; /* when true Man-in-the-middle protection will be enabled*/ |
| private boolean mMin16DigitPin = false; /* Minimum 16 digit pin for sec mode 2 connections */ |
| @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 int mFd; |
| private String mServiceName; |
| private static final int PROXY_CONNECTION_TIMEOUT = 5000; |
| |
| private static final int SOCK_SIGNAL_SIZE = 20; |
| |
| 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 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 fd fd to use for connected socket, or -1 for a new 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, int fd, boolean auth, boolean encrypt, |
| BluetoothDevice device, int port, ParcelUuid uuid) throws IOException { |
| this(type, fd, auth, encrypt, device, port, uuid, false, false); |
| } |
| |
| /** |
| * Construct a BluetoothSocket. |
| * |
| * @param type type of socket |
| * @param fd fd to use for connected socket, or -1 for a new 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 man-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, int fd, 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); |
| if (type == BluetoothSocket.TYPE_RFCOMM && uuid == null && fd == -1 |
| && 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; |
| mFd = fd; |
| |
| 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); |
| } |
| |
| 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; |
| |
| mServiceName = s.mServiceName; |
| mExcludeSdp = s.mExcludeSdp; |
| mAuthMitm = s.mAuthMitm; |
| mMin16DigitPin = s.mMin16DigitPin; |
| } |
| |
| 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, "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 acept failed"); |
| } |
| |
| as.mPfd = new ParcelFileDescriptor(fds[0]); |
| as.mSocket = LocalSocket.createConnectedLocalSocket(fds[0]); |
| as.mSocketIS = as.mSocket.getInputStream(); |
| as.mSocketOS = as.mSocket.getOutputStream(); |
| as.mAddress = remoteAddr; |
| as.mDevice = BluetoothAdapter.getDefaultAdapter().getRemoteDevice(remoteAddr); |
| return as; |
| } |
| |
| /** |
| * Construct a BluetoothSocket from address. Used by native code. |
| * |
| * @param type type of socket |
| * @param fd fd to use for connected socket, or -1 for a new socket |
| * @param auth require the remote device to be authenticated |
| * @param encrypt require the connection to be encrypted |
| * @param address remote device that this socket can connect to |
| * @param port remote port |
| * @throws IOException On error, for example Bluetooth not available, or insufficient |
| * privileges |
| */ |
| private BluetoothSocket(int type, int fd, boolean auth, boolean encrypt, String address, |
| int port) throws IOException { |
| this(type, fd, auth, encrypt, new BluetoothDevice(address), port, null, false, false); |
| } |
| |
| /** @hide */ |
| @Override |
| 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 |
| */ |
| 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 |
| */ |
| 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 |
| */ |
| 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 |
| */ |
| public boolean isConnected() { |
| return mSocketState == SocketState.CONNECTED; |
| } |
| |
| /*package*/ void setServiceName(String name) { |
| mServiceName = name; |
| } |
| |
| /** |
| * 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 IOException on error, for example connection failure |
| */ |
| public void connect() throws IOException { |
| if (mDevice == null) throw new IOException("Connect is called on null device"); |
| |
| try { |
| if (mSocketState == SocketState.CLOSED) throw new IOException("socket closed"); |
| IBluetooth bluetoothProxy = |
| BluetoothAdapter.getDefaultAdapter().getBluetoothService(null); |
| if (bluetoothProxy == null) throw new IOException("Bluetooth is off"); |
| mPfd = bluetoothProxy.getSocketManager().connectSocket(mDevice, mType, |
| mUuid, mPort, getSecurityFlags()); |
| synchronized (this) { |
| if (DBG) Log.d(TAG, "connect(), SocketState: " + mSocketState + ", mPfd: " + mPfd); |
| if (mSocketState == SocketState.CLOSED) throw new IOException("socket closed"); |
| if (mPfd == null) throw new IOException("bt socket connect failed"); |
| FileDescriptor fd = mPfd.getFileDescriptor(); |
| mSocket = LocalSocket.createConnectedLocalSocket(fd); |
| mSocketIS = mSocket.getInputStream(); |
| mSocketOS = mSocket.getOutputStream(); |
| } |
| int channel = readInt(mSocketIS); |
| if (channel <= 0) { |
| throw new IOException("bt socket connect failed"); |
| } |
| mPort = channel; |
| waitSocketSignal(mSocketIS); |
| synchronized (this) { |
| if (mSocketState == SocketState.CLOSED) { |
| throw new IOException("bt socket closed"); |
| } |
| mSocketState = SocketState.CONNECTED; |
| } |
| } catch (RemoteException e) { |
| Log.e(TAG, Log.getStackTraceString(new Throwable())); |
| throw new IOException("unable to send RPC: " + e.getMessage()); |
| } |
| } |
| |
| /** |
| * Currently returns unix errno instead of throwing IOException, |
| * so that BluetoothAdapter can check the error code for EADDRINUSE |
| */ |
| /*package*/ int bindListen() { |
| int ret; |
| if (mSocketState == SocketState.CLOSED) return EBADFD; |
| IBluetooth bluetoothProxy = BluetoothAdapter.getDefaultAdapter().getBluetoothService(null); |
| 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); |
| mPfd = bluetoothProxy.getSocketManager().createSocketChannel(mType, mServiceName, |
| mUuid, mPort, getSecurityFlags()); |
| } catch (RemoteException e) { |
| Log.e(TAG, 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 = LocalSocket.createConnectedLocalSocket(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"); |
| } |
| if (timeout > 0) { |
| Log.d(TAG, "accept() set timeout (ms):" + timeout); |
| 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; |
| } |
| } |
| } |
| } |
| |
| /*package */ void removeChannel() { |
| } |
| |
| /*package */ int getPort() { |
| return mPort; |
| } |
| |
| /** |
| * 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. |
| */ |
| 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. |
| */ |
| 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} |
| */ |
| 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 |
| */ |
| 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 |
| */ |
| 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(null); |
| if (bluetoothProxy == null) { |
| throw new IOException("Bluetooth is off"); |
| } |
| |
| if (DBG) Log.d(TAG, "requestMaximumTxDataLength"); |
| bluetoothProxy.getSocketManager().requestMaximumTxDataLength(mDevice); |
| } catch (RemoteException e) { |
| Log.e(TAG, Log.getStackTraceString(new Throwable())); |
| throw new IOException("unable to send RPC: " + e.getMessage()); |
| } |
| } |
| |
| 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 |
| String RemoteAddr = convertAddr(addr); |
| if (VDBG) { |
| Log.d(TAG, "waitSocketSignal: sig size: " + size + ", remote addr: " |
| + RemoteAddr + ", channel: " + channel + ", status: " + status |
| + " MaxRxPktSize: " + mMaxRxPacketSize + " MaxTxPktSize: " + mMaxTxPacketSize); |
| } |
| 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; |
| } |
| |
| |
| } |
