BluetoothOppRfcommListener.java revision a930b6831d0c70b6c5d34e548e6b1dceaa6529a0 
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;
38
39import android.bluetooth.BluetoothAdapter;
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 = "BtOppRfcommListener";
51
52    private static final boolean V = Constants.VERBOSE;
53
54    public static final int MSG_INCOMING_BTOPP_CONNECTION = 100;
55
56    private volatile boolean mInterrupted;
57
58    private Thread mSocketAcceptThread;
59
60    private Handler mCallback;
61
62    private static final int CREATE_RETRY_TIME = 10;
63
64    private static final int DEFAULT_OPP_CHANNEL = 12;
65
66    private final int mBtOppRfcommChannel;
67
68    private final BluetoothAdapter mAdapter;
69
70    private BluetoothServerSocket mBtServerSocket = null;
71
72    private ServerSocket mTcpServerSocket = null;
73
74    public BluetoothOppRfcommListener(BluetoothAdapter adapter) {
75        this(adapter, DEFAULT_OPP_CHANNEL);
76    }
77
78    public BluetoothOppRfcommListener(BluetoothAdapter adapter, int channel) {
79        mBtOppRfcommChannel = channel;
80        mAdapter = adapter;
81    }
82
83    public synchronized boolean start(Handler callback) {
84        if (mSocketAcceptThread == null) {
85            mCallback = callback;
86
87            mSocketAcceptThread = new Thread(TAG) {
88
89                public void run() {
90                    if (Constants.USE_TCP_DEBUG) {
91                        try {
92                            if (V) Log.v(TAG, "Create TCP ServerSocket");
93                            mTcpServerSocket = new ServerSocket(Constants.TCP_DEBUG_PORT, 1);
94                        } catch (IOException e) {
95                            Log.e(TAG, "Error listing on port" + Constants.TCP_DEBUG_PORT);
96                            mInterrupted = true;
97                        }
98                        while (!mInterrupted) {
99                            try {
100                                Socket clientSocket = mTcpServerSocket.accept();
101
102                                if (V) Log.v(TAG, "Socket connected!");
103                                TestTcpTransport transport = new TestTcpTransport(clientSocket);
104                                Message msg = Message.obtain();
105                                msg.setTarget(mCallback);
106                                msg.what = MSG_INCOMING_BTOPP_CONNECTION;
107                                msg.obj = transport;
108                                msg.sendToTarget();
109
110                            } catch (IOException e) {
111                                Log.e(TAG, "Error accept connection " + e);
112                            }
113                        }
114                        if (V) Log.v(TAG, "TCP listen thread finished");
115                    } else {
116                        boolean serverOK = true;
117
118                        /*
119                         * it's possible that create will fail in some cases.
120                         * retry for 10 times
121                         */
122                        for (int i = 0; i < CREATE_RETRY_TIME && !mInterrupted; i++) {
123                            try {
124                                mBtServerSocket = mAdapter
125                                        .listenUsingInsecureRfcommOn(mBtOppRfcommChannel);
126                            } catch (IOException e1) {
127                                Log.e(TAG, "Error create RfcommServerSocket " + e1);
128                                serverOK = false;
129                            }
130                            if (!serverOK) {
131                                synchronized (this) {
132                                    try {
133                                        if (V) Log.v(TAG, "wait 3 seconds");
134                                        Thread.sleep(3000);
135                                    } catch (InterruptedException e) {
136                                        Log.e(TAG, "socketAcceptThread thread was interrupted (3)");
137                                        mInterrupted = true;
138                                    }
139                                }
140                            } else {
141                                break;
142                            }
143                        }
144                        if (!serverOK) {
145                            Log.e(TAG, "Error start listening after " + CREATE_RETRY_TIME + " try");
146                            mInterrupted = true;
147                        }
148                        if (!mInterrupted) {
149                            Log.i(TAG, "Accept thread started on channel " + mBtOppRfcommChannel);
150                        }
151                        BluetoothSocket clientSocket;
152                        while (!mInterrupted) {
153                            try {
154                                clientSocket = mBtServerSocket.accept();
155                                Log.i(TAG, "Accepted connectoin from "
156                                        + clientSocket.getRemoteDevice());
157                                BluetoothOppRfcommTransport transport = new BluetoothOppRfcommTransport(
158                                        clientSocket);
159                                Message msg = Message.obtain();
160                                msg.setTarget(mCallback);
161                                msg.what = MSG_INCOMING_BTOPP_CONNECTION;
162                                msg.obj = transport;
163                                msg.sendToTarget();
164                            } catch (IOException e) {
165                                Log.e(TAG, "Error accept connection " + e);
166                            }
167                        }
168                        Log.i(TAG, "BluetoothSocket listen thread finished");
169                    }
170                }
171            };
172            mInterrupted = false;
173            if(!Constants.USE_TCP_SIMPLE_SERVER) {
174                mSocketAcceptThread.start();
175            }
176        }
177        return true;
178    }
179
180    public synchronized void stop() {
181        if (mSocketAcceptThread != null) {
182            Log.i(TAG, "stopping Accept Thread");
183
184            mInterrupted = true;
185            if (Constants.USE_TCP_DEBUG) {
186                if (V) Log.v(TAG, "close mTcpServerSocket");
187                if (mTcpServerSocket != null) {
188                    try {
189                        mTcpServerSocket.close();
190                    } catch (IOException e) {
191                        Log.e(TAG, "Error close mTcpServerSocket");
192                    }
193                }
194            } else {
195                if (V) Log.v(TAG, "close mBtServerSocket");
196
197                if (mBtServerSocket != null) {
198                    try {
199                        mBtServerSocket.close();
200                    } catch (IOException e) {
201                        Log.e(TAG, "Error close mBtServerSocket");
202                    }
203                }
204            }
205            try {
206                mSocketAcceptThread.interrupt();
207                if (V) Log.v(TAG, "waiting for thread to terminate");
208                mSocketAcceptThread.join();
209                mSocketAcceptThread = null;
210                mCallback = null;
211            } catch (InterruptedException e) {
212                if (V) Log.v(TAG, "Interrupted waiting for Accept Thread to join");
213            }
214        }
215    }
216}
217