Jake Hamby | 9a62c9c | 2010-12-09 14:47:57 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2010 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 | |
| 17 | package android.server; |
| 18 | |
| 19 | import android.bluetooth.BluetoothAdapter; |
| 20 | import android.bluetooth.BluetoothDevice; |
| 21 | import android.content.Context; |
| 22 | import android.content.Intent; |
| 23 | import android.util.Log; |
| 24 | |
| 25 | import java.io.BufferedReader; |
| 26 | import java.io.BufferedWriter; |
| 27 | import java.io.DataInputStream; |
| 28 | import java.io.File; |
| 29 | import java.io.FileInputStream; |
| 30 | import java.io.FileNotFoundException; |
| 31 | import java.io.FileOutputStream; |
| 32 | import java.io.FileWriter; |
| 33 | import java.io.IOException; |
| 34 | import java.io.InputStreamReader; |
| 35 | import java.util.ArrayList; |
| 36 | import java.util.Arrays; |
| 37 | import java.util.HashMap; |
| 38 | import java.util.Map; |
| 39 | |
| 40 | /** |
| 41 | * Local cache of bonding state. |
| 42 | * We keep our own state to track the intermediate state BONDING, which |
| 43 | * bluez does not track. |
| 44 | * All addresses must be passed in upper case. |
| 45 | */ |
| 46 | class BluetoothBondState { |
| 47 | private static final String TAG = "BluetoothBondState"; |
| 48 | private static final boolean DBG = true; |
| 49 | |
| 50 | private final HashMap<String, Integer> mState = new HashMap<String, Integer>(); |
| 51 | private final HashMap<String, Integer> mPinAttempt = new HashMap<String, Integer>(); |
| 52 | |
| 53 | private static final String AUTO_PAIRING_BLACKLIST = |
| 54 | "/etc/bluetooth/auto_pairing.conf"; |
| 55 | private static final String DYNAMIC_AUTO_PAIRING_BLACKLIST = |
| 56 | "/data/misc/bluetooth/dynamic_auto_pairing.conf"; |
| 57 | private ArrayList<String> mAutoPairingAddressBlacklist; |
| 58 | private ArrayList<String> mAutoPairingExactNameBlacklist; |
| 59 | private ArrayList<String> mAutoPairingPartialNameBlacklist; |
| 60 | private ArrayList<String> mAutoPairingFixedPinZerosKeyboardList; |
| 61 | // Addresses added to blacklist dynamically based on usage. |
| 62 | private ArrayList<String> mAutoPairingDynamicAddressBlacklist; |
| 63 | |
| 64 | // If this is an outgoing connection, store the address. |
| 65 | // There can be only 1 pending outgoing connection at a time, |
| 66 | private String mPendingOutgoingBonding; |
| 67 | |
| 68 | private final Context mContext; |
| 69 | private final BluetoothService mService; |
| 70 | private final BluetoothInputProfileHandler mBluetoothInputProfileHandler; |
| 71 | |
| 72 | BluetoothBondState(Context context, BluetoothService service) { |
| 73 | mContext = context; |
| 74 | mService = service; |
| 75 | mBluetoothInputProfileHandler = |
| 76 | BluetoothInputProfileHandler.getInstance(mContext, mService); |
| 77 | } |
| 78 | |
| 79 | synchronized void setPendingOutgoingBonding(String address) { |
| 80 | mPendingOutgoingBonding = address; |
| 81 | } |
| 82 | |
| 83 | public synchronized String getPendingOutgoingBonding() { |
| 84 | return mPendingOutgoingBonding; |
| 85 | } |
| 86 | |
| 87 | public synchronized void loadBondState() { |
| 88 | if (mService.getBluetoothStateInternal() != |
| 89 | BluetoothAdapter.STATE_TURNING_ON) { |
| 90 | return; |
| 91 | } |
| 92 | String val = mService.getAdapterProperties().getProperty("Devices"); |
| 93 | if (val == null) { |
| 94 | return; |
| 95 | } |
| 96 | String[] bonds = val.split(","); |
| 97 | if (bonds == null) { |
| 98 | return; |
| 99 | } |
| 100 | mState.clear(); |
| 101 | if (DBG) Log.d(TAG, "found " + bonds.length + " bonded devices"); |
| 102 | for (String device : bonds) { |
| 103 | mState.put(mService.getAddressFromObjectPath(device).toUpperCase(), |
| 104 | BluetoothDevice.BOND_BONDED); |
| 105 | } |
| 106 | } |
| 107 | |
| 108 | public synchronized void setBondState(String address, int state) { |
| 109 | setBondState(address, state, 0); |
| 110 | } |
| 111 | |
| 112 | /** reason is ignored unless state == BOND_NOT_BONDED */ |
| 113 | public synchronized void setBondState(String address, int state, int reason) { |
| 114 | int oldState = getBondState(address); |
| 115 | if (oldState == state) { |
| 116 | return; |
| 117 | } |
| 118 | |
| 119 | // Check if this was an pending outgoing bonding. |
| 120 | // If yes, reset the state. |
| 121 | if (oldState == BluetoothDevice.BOND_BONDING) { |
| 122 | if (address.equals(mPendingOutgoingBonding)) { |
| 123 | mPendingOutgoingBonding = null; |
| 124 | } |
| 125 | } |
| 126 | |
| 127 | if (state == BluetoothDevice.BOND_BONDED) { |
| 128 | mService.addProfileState(address); |
| 129 | } else if (state == BluetoothDevice.BOND_NONE) { |
| 130 | mService.removeProfileState(address); |
| 131 | } |
| 132 | |
| 133 | // HID is handled by BluetoothService, other profiles |
| 134 | // will be handled by their respective services. |
| 135 | mBluetoothInputProfileHandler.setInitialInputDevicePriority( |
| 136 | mService.getRemoteDevice(address), state); |
| 137 | |
| 138 | if (DBG) { |
| 139 | Log.d(TAG, address + " bond state " + oldState + " -> " + state |
| 140 | + " (" + reason + ")"); |
| 141 | } |
| 142 | Intent intent = new Intent(BluetoothDevice.ACTION_BOND_STATE_CHANGED); |
| 143 | intent.putExtra(BluetoothDevice.EXTRA_DEVICE, mService.getRemoteDevice(address)); |
| 144 | intent.putExtra(BluetoothDevice.EXTRA_BOND_STATE, state); |
| 145 | intent.putExtra(BluetoothDevice.EXTRA_PREVIOUS_BOND_STATE, oldState); |
| 146 | if (state == BluetoothDevice.BOND_NONE) { |
| 147 | if (reason <= 0) { |
| 148 | Log.w(TAG, "setBondState() called to unbond device, but reason code is " + |
| 149 | "invalid. Overriding reason code with BOND_RESULT_REMOVED"); |
| 150 | reason = BluetoothDevice.UNBOND_REASON_REMOVED; |
| 151 | } |
| 152 | intent.putExtra(BluetoothDevice.EXTRA_REASON, reason); |
| 153 | mState.remove(address); |
| 154 | } else { |
| 155 | mState.put(address, state); |
| 156 | } |
| 157 | |
| 158 | mContext.sendBroadcast(intent, BluetoothService.BLUETOOTH_PERM); |
| 159 | } |
| 160 | |
| 161 | public boolean isAutoPairingBlacklisted(String address) { |
| 162 | if (mAutoPairingAddressBlacklist != null) { |
| 163 | for (String blacklistAddress : mAutoPairingAddressBlacklist) { |
| 164 | if (address.startsWith(blacklistAddress)) return true; |
| 165 | } |
| 166 | } |
| 167 | |
| 168 | if (mAutoPairingDynamicAddressBlacklist != null) { |
| 169 | for (String blacklistAddress: mAutoPairingDynamicAddressBlacklist) { |
| 170 | if (address.equals(blacklistAddress)) return true; |
| 171 | } |
| 172 | } |
| 173 | |
| 174 | String name = mService.getRemoteName(address); |
| 175 | if (name != null) { |
| 176 | if (mAutoPairingExactNameBlacklist != null) { |
| 177 | for (String blacklistName : mAutoPairingExactNameBlacklist) { |
| 178 | if (name.equals(blacklistName)) return true; |
| 179 | } |
| 180 | } |
| 181 | |
| 182 | if (mAutoPairingPartialNameBlacklist != null) { |
| 183 | for (String blacklistName : mAutoPairingPartialNameBlacklist) { |
| 184 | if (name.startsWith(blacklistName)) return true; |
| 185 | } |
| 186 | } |
| 187 | } |
| 188 | return false; |
| 189 | } |
| 190 | |
| 191 | public boolean isFixedPinZerosAutoPairKeyboard(String address) { |
| 192 | // Note: the meaning of blacklist is reversed in this case. |
| 193 | // If its in the list, we can go ahead and auto pair since |
| 194 | // by default keyboard should have a variable PIN that we don't |
| 195 | // auto pair using 0000. |
| 196 | if (mAutoPairingFixedPinZerosKeyboardList != null) { |
| 197 | for (String blacklistAddress : mAutoPairingFixedPinZerosKeyboardList) { |
| 198 | if (address.startsWith(blacklistAddress)) return true; |
| 199 | } |
| 200 | } |
| 201 | return false; |
| 202 | } |
| 203 | |
| 204 | public synchronized int getBondState(String address) { |
| 205 | Integer state = mState.get(address); |
| 206 | if (state == null) { |
| 207 | return BluetoothDevice.BOND_NONE; |
| 208 | } |
| 209 | return state.intValue(); |
| 210 | } |
| 211 | |
| 212 | /*package*/ synchronized String[] listInState(int state) { |
| 213 | ArrayList<String> result = new ArrayList<String>(mState.size()); |
| 214 | for (Map.Entry<String, Integer> e : mState.entrySet()) { |
| 215 | if (e.getValue().intValue() == state) { |
| 216 | result.add(e.getKey()); |
| 217 | } |
| 218 | } |
| 219 | return result.toArray(new String[result.size()]); |
| 220 | } |
| 221 | |
| 222 | public synchronized void addAutoPairingFailure(String address) { |
| 223 | if (mAutoPairingDynamicAddressBlacklist == null) { |
| 224 | mAutoPairingDynamicAddressBlacklist = new ArrayList<String>(); |
| 225 | } |
| 226 | |
| 227 | updateAutoPairingData(address); |
| 228 | mAutoPairingDynamicAddressBlacklist.add(address); |
| 229 | } |
| 230 | |
| 231 | public synchronized boolean isAutoPairingAttemptsInProgress(String address) { |
| 232 | return getAttempt(address) != 0; |
| 233 | } |
| 234 | |
| 235 | public synchronized void clearPinAttempts(String address) { |
| 236 | mPinAttempt.remove(address); |
| 237 | } |
| 238 | |
| 239 | public synchronized boolean hasAutoPairingFailed(String address) { |
| 240 | if (mAutoPairingDynamicAddressBlacklist == null) return false; |
| 241 | |
| 242 | return mAutoPairingDynamicAddressBlacklist.contains(address); |
| 243 | } |
| 244 | |
| 245 | public synchronized int getAttempt(String address) { |
| 246 | Integer attempt = mPinAttempt.get(address); |
| 247 | if (attempt == null) { |
| 248 | return 0; |
| 249 | } |
| 250 | return attempt.intValue(); |
| 251 | } |
| 252 | |
| 253 | public synchronized void attempt(String address) { |
| 254 | Integer attempt = mPinAttempt.get(address); |
| 255 | int newAttempt; |
| 256 | if (attempt == null) { |
| 257 | newAttempt = 1; |
| 258 | } else { |
| 259 | newAttempt = attempt.intValue() + 1; |
| 260 | } |
| 261 | mPinAttempt.put(address, new Integer(newAttempt)); |
| 262 | } |
| 263 | |
| 264 | private void copyAutoPairingData() { |
| 265 | FileInputStream in = null; |
| 266 | FileOutputStream out = null; |
| 267 | try { |
| 268 | File file = new File(DYNAMIC_AUTO_PAIRING_BLACKLIST); |
| 269 | if (file.exists()) return; |
| 270 | |
| 271 | in = new FileInputStream(AUTO_PAIRING_BLACKLIST); |
| 272 | out= new FileOutputStream(DYNAMIC_AUTO_PAIRING_BLACKLIST); |
| 273 | |
| 274 | byte[] buf = new byte[1024]; |
| 275 | int len; |
| 276 | while ((len = in.read(buf)) > 0) { |
| 277 | out.write(buf, 0, len); |
| 278 | } |
| 279 | } catch (FileNotFoundException e) { |
| 280 | Log.e(TAG, "FileNotFoundException: copyAutoPairingData " + e); |
| 281 | } catch (IOException e) { |
| 282 | Log.e(TAG, "IOException: copyAutoPairingData " + e); |
| 283 | } finally { |
| 284 | try { |
| 285 | if (in != null) in.close(); |
| 286 | if (out != null) out.close(); |
| 287 | } catch (IOException e) {} |
| 288 | } |
| 289 | } |
| 290 | |
| 291 | synchronized public void readAutoPairingData() { |
| 292 | if (mAutoPairingAddressBlacklist != null) return; |
| 293 | copyAutoPairingData(); |
| 294 | FileInputStream fstream = null; |
| 295 | try { |
| 296 | fstream = new FileInputStream(DYNAMIC_AUTO_PAIRING_BLACKLIST); |
| 297 | DataInputStream in = new DataInputStream(fstream); |
| 298 | BufferedReader file = new BufferedReader(new InputStreamReader(in)); |
| 299 | String line; |
| 300 | while((line = file.readLine()) != null) { |
| 301 | line = line.trim(); |
| 302 | if (line.length() == 0 || line.startsWith("//")) continue; |
| 303 | String[] value = line.split("="); |
| 304 | if (value != null && value.length == 2) { |
| 305 | String[] val = value[1].split(","); |
| 306 | if (value[0].equalsIgnoreCase("AddressBlacklist")) { |
| 307 | mAutoPairingAddressBlacklist = |
| 308 | new ArrayList<String>(Arrays.asList(val)); |
| 309 | } else if (value[0].equalsIgnoreCase("ExactNameBlacklist")) { |
| 310 | mAutoPairingExactNameBlacklist = |
| 311 | new ArrayList<String>(Arrays.asList(val)); |
| 312 | } else if (value[0].equalsIgnoreCase("PartialNameBlacklist")) { |
| 313 | mAutoPairingPartialNameBlacklist = |
| 314 | new ArrayList<String>(Arrays.asList(val)); |
| 315 | } else if (value[0].equalsIgnoreCase("FixedPinZerosKeyboardBlacklist")) { |
| 316 | mAutoPairingFixedPinZerosKeyboardList = |
| 317 | new ArrayList<String>(Arrays.asList(val)); |
| 318 | } else if (value[0].equalsIgnoreCase("DynamicAddressBlacklist")) { |
| 319 | mAutoPairingDynamicAddressBlacklist = |
| 320 | new ArrayList<String>(Arrays.asList(val)); |
| 321 | } else { |
| 322 | Log.e(TAG, "Error parsing Auto pairing blacklist file"); |
| 323 | } |
| 324 | } |
| 325 | } |
| 326 | } catch (FileNotFoundException e) { |
| 327 | Log.e(TAG, "FileNotFoundException: readAutoPairingData " + e); |
| 328 | } catch (IOException e) { |
| 329 | Log.e(TAG, "IOException: readAutoPairingData " + e); |
| 330 | } finally { |
| 331 | if (fstream != null) { |
| 332 | try { |
| 333 | fstream.close(); |
| 334 | } catch (IOException e) { |
| 335 | // Ignore |
| 336 | } |
| 337 | } |
| 338 | } |
| 339 | } |
| 340 | |
| 341 | // This function adds a bluetooth address to the auto pairing blacklist |
| 342 | // file. These addresses are added to DynamicAddressBlacklistSection |
| 343 | private void updateAutoPairingData(String address) { |
| 344 | BufferedWriter out = null; |
| 345 | try { |
| 346 | out = new BufferedWriter(new FileWriter(DYNAMIC_AUTO_PAIRING_BLACKLIST, true)); |
| 347 | StringBuilder str = new StringBuilder(); |
| 348 | if (mAutoPairingDynamicAddressBlacklist.size() == 0) { |
| 349 | str.append("DynamicAddressBlacklist="); |
| 350 | } |
| 351 | str.append(address); |
| 352 | str.append(","); |
| 353 | out.write(str.toString()); |
| 354 | } catch (FileNotFoundException e) { |
| 355 | Log.e(TAG, "FileNotFoundException: updateAutoPairingData " + e); |
| 356 | } catch (IOException e) { |
| 357 | Log.e(TAG, "IOException: updateAutoPairingData " + e); |
| 358 | } finally { |
| 359 | if (out != null) { |
| 360 | try { |
| 361 | out.close(); |
| 362 | } catch (IOException e) { |
| 363 | // Ignore |
| 364 | } |
| 365 | } |
| 366 | } |
| 367 | } |
| 368 | } |