BluetoothOppRfcommListener.java revision 888485a3f5fe991116c5536bb6d6903d47b63a70 
1/*
2 * Copyright (c) 2008-2009, Motorola, Inc.
3 *
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
8 *
9 * - Redistributions of source code must retain the above copyright notice,
10 * this list of conditions and the following disclaimer.
11 *
12 * - Redistributions in binary form must reproduce the above copyright notice,
13 * this list of conditions and the following disclaimer in the documentation
14 * and/or other materials provided with the distribution.
15 *
16 * - Neither the name of the Motorola, Inc. nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
21 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 */
32
33package com.android.bluetooth.opp;
34
35import java.io.IOException;
36import java.net.ServerSocket;
37import java.net.Socket;
38import java.net.SocketException;
39
40import android.bluetooth.BluetoothAdapter;
41import android.bluetooth.BluetoothServerSocket;
42import android.bluetooth.BluetoothSocket;
43import android.os.Handler;
44import android.os.Message;
45import android.util.Log;
46
47/**
48 * This class listens on OPUSH channel for incoming connection
49 */
50public class BluetoothOppRfcommListener {
51    private static final String TAG = "BtOppRfcommListener";
52
53    private static final boolean D = Constants.DEBUG;
54
55    private static final boolean V = Constants.VERBOSE;
56
57    public static final int MSG_INCOMING_BTOPP_CONNECTION = 100;
58
59    private volatile boolean mInterrupted;
60
61    private Thread mSocketAcceptThread;
62
63    private Handler mCallback;
64
65    private static final int CREATE_RETRY_TIME = 10;
66
67    private static final int DEFAULT_OPP_CHANNEL = 12;
68
69    private final int mBtOppRfcommChannel;
70
71    private final BluetoothAdapter mAdapter;
72
73    private BluetoothServerSocket mBtServerSocket = null;
74
75    private ServerSocket mTcpServerSocket = null;
76
77    public BluetoothOppRfcommListener(BluetoothAdapter adapter) {
78        this(adapter, DEFAULT_OPP_CHANNEL);
79    }
80
81    public BluetoothOppRfcommListener(BluetoothAdapter adapter, int channel) {
82        mBtOppRfcommChannel = channel;
83        mAdapter = adapter;
84    }
85
86    public synchronized boolean start(Handler callback) {
87        if (mSocketAcceptThread == null) {
88            mCallback = callback;
89
90            mSocketAcceptThread = new Thread(TAG) {
91
92                public void run() {
93                    if (Constants.USE_TCP_DEBUG) {
94                        try {
95                            if (V) Log.v(TAG, "Create TCP ServerSocket");
96                            mTcpServerSocket = new ServerSocket(Constants.TCP_DEBUG_PORT, 1);
97                        } catch (IOException e) {
98                            Log.e(TAG, "Error listing on port" + Constants.TCP_DEBUG_PORT);
99                            mInterrupted = true;
100                        }
101                        while (!mInterrupted) {
102                            try {
103                                Socket clientSocket = mTcpServerSocket.accept();
104
105                                if (V) Log.v(TAG, "Socket connected!");
106                                TestTcpTransport transport = new TestTcpTransport(clientSocket);
107                                Message msg = Message.obtain();
108                                msg.setTarget(mCallback);
109                                msg.what = MSG_INCOMING_BTOPP_CONNECTION;
110                                msg.obj = transport;
111                                msg.sendToTarget();
112
113                            } catch (IOException e) {
114                                Log.e(TAG, "Error accept connection " + e);
115                            }
116                        }
117                        if (V) Log.v(TAG, "TCP listen thread finished");
118                    } else {
119                        boolean serverOK = true;
120
121                        /*
122                         * it's possible that create will fail in some cases.
123                         * retry for 10 times
124                         */
125                        for (int i = 0; i < CREATE_RETRY_TIME && !mInterrupted; i++) {
126                            try {
127                                mBtServerSocket = mAdapter
128                                        .listenUsingInsecureRfcommOn(mBtOppRfcommChannel);
129                            } catch (IOException e1) {
130                                Log.e(TAG, "Error create RfcommServerSocket " + e1);
131                                serverOK = false;
132                            }
133                            if (!serverOK) {
134                                synchronized (this) {
135                                    try {
136                                        if (V) Log.v(TAG, "wait 3 seconds");
137                                        Thread.sleep(3000);
138                                    } catch (InterruptedException e) {
139                                        Log.e(TAG, "socketAcceptThread thread was interrupted (3)");
140                                        mInterrupted = true;
141                                    }
142                                }
143                            } else {
144                                break;
145                            }
146                        }
147                        if (!serverOK) {
148                            Log.e(TAG, "Error start listening after " + CREATE_RETRY_TIME + " try");
149                            mInterrupted = true;
150                        }
151                        if (!mInterrupted) {
152                            Log.i(TAG, "Accept thread started on channel " + mBtOppRfcommChannel);
153                        }
154                        BluetoothSocket clientSocket;
155                        while (!mInterrupted) {
156                            try {
157                                clientSocket = mBtServerSocket.accept();
158                                Log.i(TAG, "Accepted connectoin from "
159                                        + clientSocket.getRemoteDevice());
160                                BluetoothOppRfcommTransport transport = new BluetoothOppRfcommTransport(
161                                        clientSocket);
162                                Message msg = Message.obtain();
163                                msg.setTarget(mCallback);
164                                msg.what = MSG_INCOMING_BTOPP_CONNECTION;
165                                msg.obj = transport;
166                                msg.sendToTarget();
167                            } catch (IOException e) {
168                                Log.e(TAG, "Error accept connection " + e);
169                            }
170                        }
171                        Log.i(TAG, "BluetoothSocket listen thread finished");
172                    }
173                }
174            };
175            mInterrupted = false;
176            if(!Constants.USE_TCP_SIMPLE_SERVER) {
177                mSocketAcceptThread.start();
178            }
179        }
180        return true;
181    }
182
183    public synchronized void stop() {
184        if (mSocketAcceptThread != null) {
185            Log.i(TAG, "stopping Accept Thread");
186
187            mInterrupted = true;
188            if (Constants.USE_TCP_DEBUG) {
189                if (V) Log.v(TAG, "close mTcpServerSocket");
190                if (mTcpServerSocket != null) {
191                    try {
192                        mTcpServerSocket.close();
193                    } catch (IOException e) {
194                        Log.e(TAG, "Error close mTcpServerSocket");
195                    }
196                }
197            } else {
198                if (V) Log.v(TAG, "close mBtServerSocket");
199
200                if (mBtServerSocket != null) {
201                    try {
202                        mBtServerSocket.close();
203                    } catch (IOException e) {
204                        Log.e(TAG, "Error close mBtServerSocket");
205                    }
206                }
207            }
208            try {
209                mSocketAcceptThread.interrupt();
210                if (V) Log.v(TAG, "waiting for thread to terminate");
211                mSocketAcceptThread.join();
212                mSocketAcceptThread = null;
213                mCallback = null;
214            } catch (InterruptedException e) {
215                if (V) Log.v(TAG, "Interrupted waiting for Accept Thread to join");
216            }
217        }
218    }
219}
220