BluetoothOppRfcommListener.java revision 52236de777c23788df8147de15912a57e8bc36dd 
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.BluetoothServerSocket;
41import android.bluetooth.BluetoothSocket;
42import android.os.Handler;
43import android.os.Message;
44import android.util.Log;
45
46/**
47 * This class listens on OPUSH channel for incoming connection
48 */
49public class BluetoothOppRfcommListener {
50    private static final String TAG = "BtOpp RfcommListener";
51
52    private volatile boolean mInterrupted;
53
54    private Thread mSocketAcceptThread;
55
56    private Handler mCallback;
57
58    private static final int ACCEPT_WAIT_TIMEOUT = 5000;
59
60    private static final int CREATE_RETRY_TIME = 10;
61
62    public static final int DEFAULT_OPP_CHANNEL = 12;
63
64    public static final int MSG_INCOMING_BTOPP_CONNECTION = 100;
65
66    private int mBtOppRfcommChannel = -1;
67
68    public BluetoothOppRfcommListener() {
69        this(DEFAULT_OPP_CHANNEL);
70    }
71
72    public BluetoothOppRfcommListener(int channel) {
73        mBtOppRfcommChannel = channel;
74    }
75
76    public synchronized boolean start(Handler callback) {
77        if (mSocketAcceptThread == null) {
78            mCallback = callback;
79            if (Constants.LOGV) {
80                Log.v(TAG, "create mSocketAcceptThread");
81            }
82            mSocketAcceptThread = new Thread(TAG) {
83
84                public void run() {
85                    if (Constants.LOGV) {
86                        Log.v(TAG, "BluetoothOppRfcommListener thread starting");
87                    }
88                    if (Constants.USE_TCP_DEBUG) {
89                        ServerSocket mServerSocket = null;
90                        try {
91                            if (Constants.LOGVV) {
92                                Log.v(TAG, "Create ServerSocket on port "
93                                        + Constants.TCP_DEBUG_PORT);
94                            }
95
96                            mServerSocket = new ServerSocket(Constants.TCP_DEBUG_PORT, 1);
97
98                        } catch (IOException e) {
99                            Log.e(TAG, "Error listing on port" + Constants.TCP_DEBUG_PORT);
100                            mInterrupted = true;
101                        }
102                        while (!mInterrupted) {
103                            try {
104                                mServerSocket.setSoTimeout(ACCEPT_WAIT_TIMEOUT);
105                                Socket clientSocket = mServerSocket.accept();
106
107                                if (clientSocket == null) {
108                                    if (Constants.LOGVV) {
109                                        Log.v(TAG, "incomming connection time out");
110                                    }
111                                } else {
112                                    if (Constants.LOGV) {
113                                        Log.v(TAG, "TCP Socket connected!");
114                                    }
115                                    Log.d(TAG, "remote addr is "
116                                            + clientSocket.getRemoteSocketAddress());
117                                    TestTcpTransport transport = new TestTcpTransport(clientSocket);
118                                    Message msg = Message.obtain();
119                                    msg.setTarget(mCallback);
120                                    msg.what = MSG_INCOMING_BTOPP_CONNECTION;
121                                    msg.obj = transport;
122                                    msg.sendToTarget();
123                                }
124                            } catch (SocketException e) {
125                                if (Constants.LOGVV) {
126                                    Log.v(TAG, "Error accept connection " + e);
127                                }
128                            } catch (IOException e) {
129                                if (Constants.LOGVV) {
130                                    Log.v(TAG, "Error accept connection " + e);
131                                }
132                            }
133                        }
134                        if (Constants.LOGV) {
135                            Log.v(TAG, "TCP listen thread finished");
136                        }
137                        try {
138                            mServerSocket.close();
139                        } catch (IOException e) {
140                            Log.e(TAG, "Error close mServerSocker " + e);
141                        }
142                    } else {
143                        BluetoothServerSocket mServerSocket = null;
144                        boolean serverOK = true;
145
146                        /*
147                         * it's possible that create will fail in some cases.
148                         * retry for 10 times
149                         */
150                        if (Constants.LOGVV) {
151                            Log.v(TAG, "Create BluetoothServerSocket on channel "
152                                    + mBtOppRfcommChannel);
153                        }
154                        for (int i = 0; i < CREATE_RETRY_TIME && !mInterrupted; i++) {
155                            try {
156                                mServerSocket = BluetoothServerSocket
157                                        .listenUsingInsecureRfcommOn(mBtOppRfcommChannel);
158                            } catch (IOException e1) {
159                                Log.d(TAG, "Error create RfcommServerSocket " + e1);
160                                serverOK = false;
161                            }
162                            if (!serverOK) {
163                                synchronized (this) {
164                                    try {
165                                        if (Constants.LOGVV) {
166                                            Log.v(TAG, "wait 3 seconds");
167                                        }
168                                        Thread.sleep(3000);
169                                    } catch (InterruptedException e) {
170                                        Log.e(TAG, "socketAcceptThread thread was interrupted (3)");
171                                        mInterrupted = true;
172                                    }
173                                }
174                            } else {
175                                break;
176                            }
177                        }
178                        if (!serverOK) {
179                            Log.e(TAG, "Error start listening after " + CREATE_RETRY_TIME + " try");
180                            mInterrupted = true;
181                        }
182
183                        BluetoothSocket clientSocket;
184                        while (!mInterrupted) {
185                            try {
186                                clientSocket = mServerSocket.accept(ACCEPT_WAIT_TIMEOUT);
187                                if (Constants.LOGVV) {
188                                    Log.v(TAG, "BluetoothSocket connected!");
189                                    Log.v(TAG, "remote addr is " + clientSocket.getAddress());
190                                }
191                                BluetoothOppRfcommTransport transport = new BluetoothOppRfcommTransport(
192                                        clientSocket);
193                                Message msg = Message.obtain();
194                                msg.setTarget(mCallback);
195                                msg.what = MSG_INCOMING_BTOPP_CONNECTION;
196                                msg.obj = transport;
197                                msg.sendToTarget();
198                            } catch (IOException e) {
199                                //TODO later accept should not throw exception
200                                if (Constants.LOGVV) {
201                                    //Log.v(TAG, "Error accept connection " + e);
202                                }
203                            }
204                        }
205                        try {
206                            if (mServerSocket != null) {
207                                if (Constants.LOGVV) {
208                                    Log.v(TAG, "close mServerSocket");
209                                }
210                                mServerSocket.close();
211                                //TODO
212                                //mServerSocket.destroy();
213                            }
214                        } catch (IOException e) {
215                            Log.e(TAG, "Errro close mServerSocket " + e);
216                        }
217                        if (Constants.LOGV) {
218                            Log.v(TAG, "BluetoothSocket listen thread finished");
219                        }
220                    }
221                }
222            };
223            mInterrupted = false;
224            mSocketAcceptThread.start();
225        }
226        return true;
227    }
228
229    public synchronized void stop() {
230        if (mSocketAcceptThread != null) {
231            if (Constants.LOGV) {
232                Log.v(TAG, "stopping Connect Thread");
233            }
234            mInterrupted = true;
235            try {
236                mSocketAcceptThread.interrupt();
237                if (Constants.LOGVV) {
238                    Log.v(TAG, "waiting for thread to terminate");
239                }
240                mSocketAcceptThread.join();
241                mSocketAcceptThread = null;
242                mCallback = null;
243            } catch (InterruptedException e) {
244                if (Constants.LOGVV) {
245                    Log.v(TAG, "Interrupted waiting for Accept Thread to join");
246                }
247            }
248        }
249    }
250}
251