BluetoothOppRfcommListener.java revision 41ef8d494511c040451f2f887cb31c3100746b61 
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 = "BtOpp RfcommListener";
52
53    private volatile boolean mInterrupted;
54
55    private Thread mSocketAcceptThread;
56
57    private Handler mCallback;
58
59    private static final int ACCEPT_WAIT_TIMEOUT = 5000;
60
61    private static final int CREATE_RETRY_TIME = 10;
62
63    public static final int DEFAULT_OPP_CHANNEL = 12;
64
65    public static final int MSG_INCOMING_BTOPP_CONNECTION = 100;
66
67    private final int mBtOppRfcommChannel;
68
69    private final BluetoothAdapter mAdapter;
70
71    public BluetoothOppRfcommListener(BluetoothAdapter adapter) {
72        this(adapter, DEFAULT_OPP_CHANNEL);
73    }
74
75    public BluetoothOppRfcommListener(BluetoothAdapter adapter, int channel) {
76        mBtOppRfcommChannel = channel;
77        mAdapter = adapter;
78    }
79
80    public synchronized boolean start(Handler callback) {
81        if (mSocketAcceptThread == null) {
82            mCallback = callback;
83            if (Constants.LOGV) {
84                Log.v(TAG, "create mSocketAcceptThread");
85            }
86            mSocketAcceptThread = new Thread(TAG) {
87
88                public void run() {
89                    if (Constants.LOGV) {
90                        Log.v(TAG, "BluetoothOppRfcommListener thread starting");
91                    }
92                    if (Constants.USE_TCP_DEBUG) {
93                        ServerSocket mServerSocket = null;
94                        try {
95                            if (Constants.LOGVV) {
96                                Log.v(TAG, "Create ServerSocket on port "
97                                        + Constants.TCP_DEBUG_PORT);
98                            }
99
100                            mServerSocket = new ServerSocket(Constants.TCP_DEBUG_PORT, 1);
101
102                        } catch (IOException e) {
103                            Log.e(TAG, "Error listing on port" + Constants.TCP_DEBUG_PORT);
104                            mInterrupted = true;
105                        }
106                        while (!mInterrupted) {
107                            try {
108                                mServerSocket.setSoTimeout(ACCEPT_WAIT_TIMEOUT);
109                                Socket clientSocket = mServerSocket.accept();
110
111                                if (clientSocket == null) {
112                                    if (Constants.LOGVV) {
113                                        Log.v(TAG, "incomming connection time out");
114                                    }
115                                } else {
116                                    if (Constants.LOGV) {
117                                        Log.v(TAG, "TCP Socket connected!");
118                                    }
119                                    Log.d(TAG, "remote addr is "
120                                            + clientSocket.getRemoteSocketAddress());
121                                    TestTcpTransport transport = new TestTcpTransport(clientSocket);
122                                    Message msg = Message.obtain();
123                                    msg.setTarget(mCallback);
124                                    msg.what = MSG_INCOMING_BTOPP_CONNECTION;
125                                    msg.obj = transport;
126                                    msg.sendToTarget();
127                                }
128                            } catch (SocketException e) {
129                                if (Constants.LOGVV) {
130                                    Log.v(TAG, "Error accept connection " + e);
131                                }
132                            } catch (IOException e) {
133                                if (Constants.LOGVV) {
134                                    Log.v(TAG, "Error accept connection " + e);
135                                }
136                            }
137                        }
138                        if (Constants.LOGV) {
139                            Log.v(TAG, "TCP listen thread finished");
140                        }
141                        try {
142                            mServerSocket.close();
143                        } catch (IOException e) {
144                            Log.e(TAG, "Error close mServerSocker " + e);
145                        }
146                    } else {
147                        BluetoothServerSocket mServerSocket = null;
148                        boolean serverOK = true;
149
150                        /*
151                         * it's possible that create will fail in some cases.
152                         * retry for 10 times
153                         */
154                        if (Constants.LOGVV) {
155                            Log.v(TAG, "Create BluetoothServerSocket on channel "
156                                    + mBtOppRfcommChannel);
157                        }
158                        for (int i = 0; i < CREATE_RETRY_TIME && !mInterrupted; i++) {
159                            try {
160                                mServerSocket =
161                                        mAdapter.listenUsingInsecureRfcommOn(mBtOppRfcommChannel);
162                            } catch (IOException e1) {
163                                Log.d(TAG, "Error create RfcommServerSocket " + e1);
164                                serverOK = false;
165                            }
166                            if (!serverOK) {
167                                synchronized (this) {
168                                    try {
169                                        if (Constants.LOGVV) {
170                                            Log.v(TAG, "wait 3 seconds");
171                                        }
172                                        Thread.sleep(3000);
173                                    } catch (InterruptedException e) {
174                                        Log.e(TAG, "socketAcceptThread thread was interrupted (3)");
175                                        mInterrupted = true;
176                                    }
177                                }
178                            } else {
179                                break;
180                            }
181                        }
182                        if (!serverOK) {
183                            Log.e(TAG, "Error start listening after " + CREATE_RETRY_TIME + " try");
184                            mInterrupted = true;
185                        }
186
187                        BluetoothSocket clientSocket;
188                        while (!mInterrupted) {
189                            try {
190                                clientSocket = mServerSocket.accept(ACCEPT_WAIT_TIMEOUT);
191                                if (Constants.LOGVV) {
192                                    Log.v(TAG, "BluetoothSocket connected!");
193                                    Log.v(TAG, "remote device is " + clientSocket.getRemoteDevice());
194                                }
195                                BluetoothOppRfcommTransport transport = new BluetoothOppRfcommTransport(
196                                        clientSocket);
197                                Message msg = Message.obtain();
198                                msg.setTarget(mCallback);
199                                msg.what = MSG_INCOMING_BTOPP_CONNECTION;
200                                msg.obj = transport;
201                                msg.sendToTarget();
202                            } catch (IOException e) {
203                                //TODO later accept should not throw exception
204                                if (Constants.LOGVV) {
205                                    //Log.v(TAG, "Error accept connection " + e);
206                                }
207                            }
208                        }
209                        try {
210                            if (mServerSocket != null) {
211                                if (Constants.LOGVV) {
212                                    Log.v(TAG, "close mServerSocket");
213                                }
214                                mServerSocket.close();
215                                //TODO
216                                //mServerSocket.destroy();
217                            }
218                        } catch (IOException e) {
219                            Log.e(TAG, "Errro close mServerSocket " + e);
220                        }
221                        if (Constants.LOGV) {
222                            Log.v(TAG, "BluetoothSocket listen thread finished");
223                        }
224                    }
225                }
226            };
227            mInterrupted = false;
228            mSocketAcceptThread.start();
229        }
230        return true;
231    }
232
233    public synchronized void stop() {
234        if (mSocketAcceptThread != null) {
235            if (Constants.LOGV) {
236                Log.v(TAG, "stopping Connect Thread");
237            }
238            mInterrupted = true;
239            try {
240                mSocketAcceptThread.interrupt();
241                if (Constants.LOGVV) {
242                    Log.v(TAG, "waiting for thread to terminate");
243                }
244                mSocketAcceptThread.join();
245                mSocketAcceptThread = null;
246                mCallback = null;
247            } catch (InterruptedException e) {
248                if (Constants.LOGVV) {
249                    Log.v(TAG, "Interrupted waiting for Accept Thread to join");
250                }
251            }
252        }
253    }
254}
255