nxpandroid | 64fd68c | 2015-09-23 16:45:15 +0530 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2012 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | package com.android.nfc.handover; |
| 17 | |
| 18 | import com.android.nfc.DeviceHost.LlcpServerSocket; |
| 19 | import com.android.nfc.DeviceHost.LlcpSocket; |
| 20 | import com.android.nfc.LlcpException; |
| 21 | import com.android.nfc.NfcService; |
| 22 | import com.android.nfc.beam.BeamManager; |
| 23 | import com.android.nfc.beam.BeamReceiveService; |
| 24 | import com.android.nfc.beam.BeamTransferRecord; |
| 25 | |
| 26 | import android.bluetooth.BluetoothDevice; |
| 27 | import android.content.Context; |
| 28 | import android.content.Intent; |
| 29 | import android.nfc.FormatException; |
| 30 | import android.nfc.NdefMessage; |
| 31 | import android.os.UserHandle; |
| 32 | import android.util.Log; |
| 33 | |
| 34 | import java.io.ByteArrayOutputStream; |
| 35 | import java.io.IOException; |
| 36 | import java.util.Arrays; |
| 37 | |
| 38 | public final class HandoverServer { |
| 39 | static final String HANDOVER_SERVICE_NAME = "urn:nfc:sn:handover"; |
| 40 | static final String TAG = "HandoverServer"; |
| 41 | static final Boolean DBG = false; |
| 42 | |
| 43 | static final int MIU = 128; |
| 44 | |
| 45 | final HandoverDataParser mHandoverDataParser; |
| 46 | final int mSap; |
| 47 | final Callback mCallback; |
| 48 | private final Context mContext; |
| 49 | |
| 50 | ServerThread mServerThread = null; |
| 51 | boolean mServerRunning = false; |
| 52 | |
| 53 | public interface Callback { |
| 54 | void onHandoverRequestReceived(); |
| 55 | void onHandoverBusy(); |
| 56 | } |
| 57 | |
| 58 | public HandoverServer(Context context, int sap, HandoverDataParser manager, Callback callback) { |
| 59 | mContext = context; |
| 60 | mSap = sap; |
| 61 | mHandoverDataParser = manager; |
| 62 | mCallback = callback; |
| 63 | } |
| 64 | |
| 65 | public synchronized void start() { |
| 66 | if (mServerThread == null) { |
| 67 | mServerThread = new ServerThread(); |
| 68 | mServerThread.start(); |
| 69 | mServerRunning = true; |
| 70 | } |
| 71 | } |
| 72 | |
| 73 | public synchronized void stop() { |
| 74 | if (mServerThread != null) { |
| 75 | mServerThread.shutdown(); |
| 76 | mServerThread = null; |
| 77 | mServerRunning = false; |
| 78 | } |
| 79 | } |
| 80 | |
| 81 | private class ServerThread extends Thread { |
| 82 | private boolean mThreadRunning = true; |
| 83 | LlcpServerSocket mServerSocket; |
| 84 | |
| 85 | @Override |
| 86 | public void run() { |
| 87 | boolean threadRunning; |
| 88 | synchronized (HandoverServer.this) { |
| 89 | threadRunning = mThreadRunning; |
| 90 | } |
| 91 | |
| 92 | while (threadRunning) { |
| 93 | try { |
| 94 | synchronized (HandoverServer.this) { |
| 95 | mServerSocket = NfcService.getInstance().createLlcpServerSocket(mSap, |
| 96 | HANDOVER_SERVICE_NAME, MIU, 1, 1024); |
| 97 | } |
| 98 | if (mServerSocket == null) { |
| 99 | if (DBG) Log.d(TAG, "failed to create LLCP service socket"); |
| 100 | return; |
| 101 | } |
| 102 | if (DBG) Log.d(TAG, "created LLCP service socket"); |
| 103 | synchronized (HandoverServer.this) { |
| 104 | threadRunning = mThreadRunning; |
| 105 | } |
| 106 | |
| 107 | while (threadRunning) { |
| 108 | LlcpServerSocket serverSocket; |
| 109 | synchronized (HandoverServer.this) { |
| 110 | serverSocket = mServerSocket; |
| 111 | } |
| 112 | |
| 113 | if (serverSocket == null) { |
| 114 | if (DBG) Log.d(TAG, "Server socket shut down."); |
| 115 | return; |
| 116 | } |
| 117 | if (DBG) Log.d(TAG, "about to accept"); |
| 118 | LlcpSocket communicationSocket = serverSocket.accept(); |
| 119 | if (DBG) Log.d(TAG, "accept returned " + communicationSocket); |
| 120 | if (communicationSocket != null) { |
| 121 | new ConnectionThread(communicationSocket).start(); |
| 122 | } |
| 123 | |
| 124 | synchronized (HandoverServer.this) { |
| 125 | threadRunning = mThreadRunning; |
| 126 | } |
| 127 | } |
| 128 | if (DBG) Log.d(TAG, "stop running"); |
| 129 | } catch (LlcpException e) { |
| 130 | Log.e(TAG, "llcp error", e); |
| 131 | } catch (IOException e) { |
Suhas Suresh | f1a5edb | 2018-04-27 11:18:14 +0530 | [diff] [blame^] | 132 | if (DBG) Log.d(TAG, "IO error"); |
nxpandroid | 64fd68c | 2015-09-23 16:45:15 +0530 | [diff] [blame] | 133 | } finally { |
| 134 | synchronized (HandoverServer.this) { |
| 135 | if (mServerSocket != null) { |
| 136 | if (DBG) Log.d(TAG, "about to close"); |
| 137 | try { |
| 138 | mServerSocket.close(); |
| 139 | } catch (IOException e) { |
| 140 | // ignore |
| 141 | } |
| 142 | mServerSocket = null; |
| 143 | } |
| 144 | } |
| 145 | } |
| 146 | |
| 147 | synchronized (HandoverServer.this) { |
| 148 | threadRunning = mThreadRunning; |
| 149 | } |
| 150 | } |
| 151 | } |
| 152 | |
| 153 | public void shutdown() { |
| 154 | synchronized (HandoverServer.this) { |
| 155 | mThreadRunning = false; |
| 156 | if (mServerSocket != null) { |
| 157 | try { |
| 158 | mServerSocket.close(); |
| 159 | } catch (IOException e) { |
| 160 | // ignore |
| 161 | } |
| 162 | mServerSocket = null; |
| 163 | } |
| 164 | } |
| 165 | } |
| 166 | } |
| 167 | |
| 168 | private class ConnectionThread extends Thread { |
| 169 | private final LlcpSocket mSock; |
| 170 | |
| 171 | ConnectionThread(LlcpSocket socket) { |
| 172 | super(TAG); |
| 173 | mSock = socket; |
| 174 | } |
| 175 | |
| 176 | @Override |
| 177 | public void run() { |
| 178 | if (DBG) Log.d(TAG, "starting connection thread"); |
| 179 | ByteArrayOutputStream byteStream = new ByteArrayOutputStream(); |
| 180 | |
| 181 | try { |
| 182 | boolean running; |
| 183 | synchronized (HandoverServer.this) { |
| 184 | running = mServerRunning; |
| 185 | } |
| 186 | |
| 187 | byte[] partial = new byte[mSock.getLocalMiu()]; |
| 188 | |
| 189 | NdefMessage handoverRequestMsg = null; |
| 190 | while (running) { |
| 191 | int size = mSock.receive(partial); |
| 192 | if (size < 0) { |
| 193 | break; |
| 194 | } |
| 195 | byteStream.write(partial, 0, size); |
| 196 | // 1) Try to parse a handover request message from bytes received so far |
| 197 | try { |
| 198 | handoverRequestMsg = new NdefMessage(byteStream.toByteArray()); |
| 199 | } catch (FormatException e) { |
| 200 | // Ignore, and try to fetch more bytes |
| 201 | } |
| 202 | |
| 203 | if (handoverRequestMsg != null) { |
| 204 | BeamManager beamManager = BeamManager.getInstance(); |
| 205 | |
| 206 | if (beamManager.isBeamInProgress()) { |
| 207 | mCallback.onHandoverBusy(); |
| 208 | break; |
| 209 | } |
| 210 | |
| 211 | // 2) convert to handover response |
| 212 | HandoverDataParser.IncomingHandoverData handoverData |
| 213 | = mHandoverDataParser.getIncomingHandoverData(handoverRequestMsg); |
| 214 | if (handoverData == null) { |
| 215 | Log.e(TAG, "Failed to create handover response"); |
| 216 | break; |
| 217 | } |
| 218 | |
| 219 | // 3) send handover response |
| 220 | int offset = 0; |
| 221 | byte[] buffer = handoverData.handoverSelect.toByteArray(); |
| 222 | int remoteMiu = mSock.getRemoteMiu(); |
| 223 | while (offset < buffer.length) { |
| 224 | int length = Math.min(buffer.length - offset, remoteMiu); |
| 225 | byte[] tmpBuffer = Arrays.copyOfRange(buffer, offset, offset+length); |
| 226 | mSock.send(tmpBuffer); |
| 227 | offset += length; |
| 228 | } |
| 229 | // We're done |
| 230 | mCallback.onHandoverRequestReceived(); |
| 231 | if (!beamManager.startBeamReceive(mContext, handoverData.handoverData)) { |
| 232 | mCallback.onHandoverBusy(); |
| 233 | break; |
| 234 | } |
| 235 | // We can process another handover transfer |
| 236 | byteStream = new ByteArrayOutputStream(); |
| 237 | } |
| 238 | |
| 239 | synchronized (HandoverServer.this) { |
| 240 | running = mServerRunning; |
| 241 | } |
| 242 | } |
| 243 | |
| 244 | } catch (IOException e) { |
| 245 | if (DBG) Log.d(TAG, "IOException"); |
| 246 | } finally { |
| 247 | try { |
| 248 | if (DBG) Log.d(TAG, "about to close"); |
| 249 | mSock.close(); |
| 250 | } catch (IOException e) { |
| 251 | // ignore |
| 252 | } |
| 253 | try { |
| 254 | byteStream.close(); |
| 255 | } catch (IOException e) { |
| 256 | // ignore |
| 257 | } |
| 258 | } |
| 259 | if (DBG) Log.d(TAG, "finished connection thread"); |
| 260 | } |
| 261 | } |
| 262 | } |