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script-astra/Android/Sdk/sources/android-35/android/bluetooth/BluetoothSocket.java

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/*
* 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);
}
}
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