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 #include <sensor/Sensor.h> 18 19 #include <inttypes.h> 20 21 #include <binder/AppOpsManager.h> 22 #include <binder/IPermissionController.h> 23 #include <binder/IServiceManager.h> 24 25 /* 26 * The permission to use for activity recognition sensors (like step counter). 27 * See sensor types for more details on what sensors should require this 28 * permission. 29 */ 30 #define SENSOR_PERMISSION_ACTIVITY_RECOGNITION "android.permission.ACTIVITY_RECOGNITION" 31 32 // ---------------------------------------------------------------------------- 33 namespace android { 34 // ---------------------------------------------------------------------------- 35 36 Sensor::Sensor(const char * name) : 37 mName(name), mHandle(0), mType(0), 38 mMinValue(0), mMaxValue(0), mResolution(0), 39 mPower(0), mMinDelay(0), mVersion(0), mFifoReservedEventCount(0), 40 mFifoMaxEventCount(0), mRequiredAppOp(-1), 41 mMaxDelay(0), mFlags(0) { 42 } 43 44 Sensor::Sensor(struct sensor_t const* hwSensor, int halVersion) : 45 Sensor(*hwSensor, uuid_t(), halVersion) { 46 } 47 48 Sensor::Sensor(struct sensor_t const& hwSensor, const uuid_t& uuid, int halVersion) : 49 Sensor("") { 50 mName = hwSensor.name; 51 mVendor = hwSensor.vendor; 52 mVersion = hwSensor.version; 53 mHandle = hwSensor.handle; 54 mType = hwSensor.type; 55 mMinValue = 0; // FIXME: minValue 56 mMaxValue = hwSensor.maxRange; // FIXME: maxValue 57 mResolution = hwSensor.resolution; 58 mPower = hwSensor.power; 59 mMinDelay = hwSensor.minDelay; 60 mFlags = 0; 61 mUuid = uuid; 62 63 // Set fifo event count zero for older devices which do not support batching. Fused 64 // sensors also have their fifo counts set to zero. 65 if (halVersion > SENSORS_DEVICE_API_VERSION_1_0) { 66 mFifoReservedEventCount = hwSensor.fifoReservedEventCount; 67 mFifoMaxEventCount = hwSensor.fifoMaxEventCount; 68 } else { 69 mFifoReservedEventCount = 0; 70 mFifoMaxEventCount = 0; 71 } 72 73 if (halVersion >= SENSORS_DEVICE_API_VERSION_1_3) { 74 if (hwSensor.maxDelay > INT_MAX) { 75 // Max delay is declared as a 64 bit integer for 64 bit architectures. But it should 76 // always fit in a 32 bit integer, log error and cap it to INT_MAX. 77 ALOGE("Sensor maxDelay overflow error %s %" PRId64, mName.string(), 78 static_cast<int64_t>(hwSensor.maxDelay)); 79 mMaxDelay = INT_MAX; 80 } else { 81 mMaxDelay = static_cast<int32_t>(hwSensor.maxDelay); 82 } 83 } else { 84 // For older hals set maxDelay to 0. 85 mMaxDelay = 0; 86 } 87 88 // Ensure existing sensors have correct string type, required permissions and reporting mode. 89 // Set reportingMode for all android defined sensor types, set wake-up flag only for proximity 90 // sensor, significant motion, tilt, pick_up gesture, wake gesture and glance gesture on older 91 // HALs. Newer HALs can define both wake-up and non wake-up proximity sensors. 92 // All the OEM defined defined sensors have flags set to whatever is provided by the HAL. 93 switch (mType) { 94 case SENSOR_TYPE_ACCELEROMETER: 95 mStringType = SENSOR_STRING_TYPE_ACCELEROMETER; 96 mFlags |= SENSOR_FLAG_CONTINUOUS_MODE; 97 break; 98 case SENSOR_TYPE_AMBIENT_TEMPERATURE: 99 mStringType = SENSOR_STRING_TYPE_AMBIENT_TEMPERATURE; 100 mFlags |= SENSOR_FLAG_ON_CHANGE_MODE; 101 break; 102 case SENSOR_TYPE_GAME_ROTATION_VECTOR: 103 mStringType = SENSOR_STRING_TYPE_GAME_ROTATION_VECTOR; 104 mFlags |= SENSOR_FLAG_CONTINUOUS_MODE; 105 break; 106 case SENSOR_TYPE_GEOMAGNETIC_ROTATION_VECTOR: 107 mStringType = SENSOR_STRING_TYPE_GEOMAGNETIC_ROTATION_VECTOR; 108 mFlags |= SENSOR_FLAG_CONTINUOUS_MODE; 109 break; 110 case SENSOR_TYPE_GRAVITY: 111 mStringType = SENSOR_STRING_TYPE_GRAVITY; 112 mFlags |= SENSOR_FLAG_CONTINUOUS_MODE; 113 break; 114 case SENSOR_TYPE_GYROSCOPE: 115 mStringType = SENSOR_STRING_TYPE_GYROSCOPE; 116 mFlags |= SENSOR_FLAG_CONTINUOUS_MODE; 117 break; 118 case SENSOR_TYPE_GYROSCOPE_UNCALIBRATED: 119 mStringType = SENSOR_STRING_TYPE_GYROSCOPE_UNCALIBRATED; 120 mFlags |= SENSOR_FLAG_CONTINUOUS_MODE; 121 break; 122 case SENSOR_TYPE_HEART_RATE: { 123 mStringType = SENSOR_STRING_TYPE_HEART_RATE; 124 mRequiredPermission = SENSOR_PERMISSION_BODY_SENSORS; 125 AppOpsManager appOps; 126 mRequiredAppOp = appOps.permissionToOpCode(String16(mRequiredPermission)); 127 mFlags |= SENSOR_FLAG_ON_CHANGE_MODE; 128 } break; 129 case SENSOR_TYPE_LIGHT: 130 mStringType = SENSOR_STRING_TYPE_LIGHT; 131 mFlags |= SENSOR_FLAG_ON_CHANGE_MODE; 132 break; 133 case SENSOR_TYPE_LINEAR_ACCELERATION: 134 mStringType = SENSOR_STRING_TYPE_LINEAR_ACCELERATION; 135 mFlags |= SENSOR_FLAG_CONTINUOUS_MODE; 136 break; 137 case SENSOR_TYPE_MAGNETIC_FIELD: 138 mStringType = SENSOR_STRING_TYPE_MAGNETIC_FIELD; 139 mFlags |= SENSOR_FLAG_CONTINUOUS_MODE; 140 break; 141 case SENSOR_TYPE_MAGNETIC_FIELD_UNCALIBRATED: 142 mStringType = SENSOR_STRING_TYPE_MAGNETIC_FIELD_UNCALIBRATED; 143 mFlags |= SENSOR_FLAG_CONTINUOUS_MODE; 144 break; 145 case SENSOR_TYPE_ORIENTATION: 146 mStringType = SENSOR_STRING_TYPE_ORIENTATION; 147 mFlags |= SENSOR_FLAG_CONTINUOUS_MODE; 148 break; 149 case SENSOR_TYPE_PRESSURE: 150 mStringType = SENSOR_STRING_TYPE_PRESSURE; 151 mFlags |= SENSOR_FLAG_CONTINUOUS_MODE; 152 break; 153 case SENSOR_TYPE_PROXIMITY: 154 mStringType = SENSOR_STRING_TYPE_PROXIMITY; 155 mFlags |= SENSOR_FLAG_ON_CHANGE_MODE; 156 if (halVersion < SENSORS_DEVICE_API_VERSION_1_3) { 157 mFlags |= SENSOR_FLAG_WAKE_UP; 158 } 159 break; 160 case SENSOR_TYPE_RELATIVE_HUMIDITY: 161 mStringType = SENSOR_STRING_TYPE_RELATIVE_HUMIDITY; 162 mFlags |= SENSOR_FLAG_ON_CHANGE_MODE; 163 break; 164 case SENSOR_TYPE_ROTATION_VECTOR: 165 mStringType = SENSOR_STRING_TYPE_ROTATION_VECTOR; 166 mFlags |= SENSOR_FLAG_CONTINUOUS_MODE; 167 break; 168 case SENSOR_TYPE_SIGNIFICANT_MOTION: 169 mStringType = SENSOR_STRING_TYPE_SIGNIFICANT_MOTION; 170 mFlags |= SENSOR_FLAG_ONE_SHOT_MODE; 171 if (halVersion < SENSORS_DEVICE_API_VERSION_1_3) { 172 mFlags |= SENSOR_FLAG_WAKE_UP; 173 } 174 break; 175 case SENSOR_TYPE_STEP_COUNTER: { 176 mStringType = SENSOR_STRING_TYPE_STEP_COUNTER; 177 mRequiredPermission = SENSOR_PERMISSION_ACTIVITY_RECOGNITION; 178 AppOpsManager appOps; 179 mRequiredAppOp = 180 appOps.permissionToOpCode(String16(mRequiredPermission)); 181 mFlags |= SENSOR_FLAG_ON_CHANGE_MODE; 182 } break; 183 case SENSOR_TYPE_STEP_DETECTOR: { 184 mStringType = SENSOR_STRING_TYPE_STEP_DETECTOR; 185 mRequiredPermission = SENSOR_PERMISSION_ACTIVITY_RECOGNITION; 186 AppOpsManager appOps; 187 mRequiredAppOp = 188 appOps.permissionToOpCode(String16(mRequiredPermission)); 189 mFlags |= SENSOR_FLAG_SPECIAL_REPORTING_MODE; 190 } break; 191 case SENSOR_TYPE_TEMPERATURE: 192 mStringType = SENSOR_STRING_TYPE_TEMPERATURE; 193 mFlags |= SENSOR_FLAG_ON_CHANGE_MODE; 194 break; 195 case SENSOR_TYPE_TILT_DETECTOR: 196 mStringType = SENSOR_STRING_TYPE_TILT_DETECTOR; 197 mFlags |= SENSOR_FLAG_SPECIAL_REPORTING_MODE; 198 if (halVersion < SENSORS_DEVICE_API_VERSION_1_3) { 199 mFlags |= SENSOR_FLAG_WAKE_UP; 200 } 201 break; 202 case SENSOR_TYPE_WAKE_GESTURE: 203 mStringType = SENSOR_STRING_TYPE_WAKE_GESTURE; 204 mFlags |= SENSOR_FLAG_ONE_SHOT_MODE; 205 if (halVersion < SENSORS_DEVICE_API_VERSION_1_3) { 206 mFlags |= SENSOR_FLAG_WAKE_UP; 207 } 208 break; 209 case SENSOR_TYPE_GLANCE_GESTURE: 210 mStringType = SENSOR_STRING_TYPE_GLANCE_GESTURE; 211 mFlags |= SENSOR_FLAG_ONE_SHOT_MODE; 212 if (halVersion < SENSORS_DEVICE_API_VERSION_1_3) { 213 mFlags |= SENSOR_FLAG_WAKE_UP; 214 } 215 break; 216 case SENSOR_TYPE_PICK_UP_GESTURE: 217 mStringType = SENSOR_STRING_TYPE_PICK_UP_GESTURE; 218 mFlags |= SENSOR_FLAG_ONE_SHOT_MODE; 219 if (halVersion < SENSORS_DEVICE_API_VERSION_1_3) { 220 mFlags |= SENSOR_FLAG_WAKE_UP; 221 } 222 break; 223 case SENSOR_TYPE_LOW_LATENCY_OFFBODY_DETECT: 224 mStringType = SENSOR_STRING_TYPE_LOW_LATENCY_OFFBODY_DETECT; 225 mFlags |= SENSOR_FLAG_ON_CHANGE_MODE; 226 break; 227 case SENSOR_TYPE_WRIST_TILT_GESTURE: 228 mStringType = SENSOR_STRING_TYPE_WRIST_TILT_GESTURE; 229 mFlags |= SENSOR_FLAG_SPECIAL_REPORTING_MODE; 230 if (halVersion < SENSORS_DEVICE_API_VERSION_1_3) { 231 mFlags |= SENSOR_FLAG_WAKE_UP; 232 } 233 break; 234 case SENSOR_TYPE_DYNAMIC_SENSOR_META: 235 mStringType = SENSOR_STRING_TYPE_DYNAMIC_SENSOR_META; 236 mFlags |= SENSOR_FLAG_SPECIAL_REPORTING_MODE; // special trigger 237 if (halVersion < SENSORS_DEVICE_API_VERSION_1_3) { 238 mFlags |= SENSOR_FLAG_WAKE_UP; 239 } 240 break; 241 case SENSOR_TYPE_POSE_6DOF: 242 mStringType = SENSOR_STRING_TYPE_POSE_6DOF; 243 mFlags |= SENSOR_FLAG_CONTINUOUS_MODE; 244 break; 245 case SENSOR_TYPE_STATIONARY_DETECT: 246 mStringType = SENSOR_STRING_TYPE_STATIONARY_DETECT; 247 mFlags |= SENSOR_FLAG_ONE_SHOT_MODE; 248 if (halVersion < SENSORS_DEVICE_API_VERSION_1_3) { 249 mFlags |= SENSOR_FLAG_WAKE_UP; 250 } 251 break; 252 case SENSOR_TYPE_MOTION_DETECT: 253 mStringType = SENSOR_STRING_TYPE_MOTION_DETECT; 254 mFlags |= SENSOR_FLAG_ONE_SHOT_MODE; 255 if (halVersion < SENSORS_DEVICE_API_VERSION_1_3) { 256 mFlags |= SENSOR_FLAG_WAKE_UP; 257 } 258 break; 259 case SENSOR_TYPE_HEART_BEAT: 260 mStringType = SENSOR_STRING_TYPE_HEART_BEAT; 261 mFlags |= SENSOR_FLAG_SPECIAL_REPORTING_MODE; 262 break; 263 264 // TODO: Placeholder for LLOB sensor type 265 266 267 case SENSOR_TYPE_ACCELEROMETER_UNCALIBRATED: 268 mStringType = SENSOR_STRING_TYPE_ACCELEROMETER_UNCALIBRATED; 269 mFlags |= SENSOR_FLAG_CONTINUOUS_MODE; 270 break; 271 default: 272 // Only pipe the stringType, requiredPermission and flags for custom sensors. 273 if (halVersion > SENSORS_DEVICE_API_VERSION_1_0 && hwSensor.stringType) { 274 mStringType = hwSensor.stringType; 275 } 276 if (halVersion > SENSORS_DEVICE_API_VERSION_1_0 && hwSensor.requiredPermission) { 277 mRequiredPermission = hwSensor.requiredPermission; 278 if (!strcmp(mRequiredPermission, SENSOR_PERMISSION_BODY_SENSORS)) { 279 AppOpsManager appOps; 280 mRequiredAppOp = appOps.permissionToOpCode(String16(SENSOR_PERMISSION_BODY_SENSORS)); 281 } 282 } 283 284 if (halVersion >= SENSORS_DEVICE_API_VERSION_1_3) { 285 mFlags = static_cast<uint32_t>(hwSensor.flags); 286 } else { 287 // This is an OEM defined sensor on an older HAL. Use minDelay to determine the 288 // reporting mode of the sensor. 289 if (mMinDelay > 0) { 290 mFlags |= SENSOR_FLAG_CONTINUOUS_MODE; 291 } else if (mMinDelay == 0) { 292 mFlags |= SENSOR_FLAG_ON_CHANGE_MODE; 293 } else if (mMinDelay < 0) { 294 mFlags |= SENSOR_FLAG_ONE_SHOT_MODE; 295 } 296 } 297 break; 298 } 299 300 if (halVersion >= SENSORS_DEVICE_API_VERSION_1_3) { 301 // Wake-up flag of HAL 1.3 and above is set here 302 mFlags |= (hwSensor.flags & SENSOR_FLAG_WAKE_UP); 303 304 // Log error if the reporting mode is not as expected, but respect HAL setting. 305 int actualReportingMode = (hwSensor.flags & REPORTING_MODE_MASK) >> REPORTING_MODE_SHIFT; 306 int expectedReportingMode = (mFlags & REPORTING_MODE_MASK) >> REPORTING_MODE_SHIFT; 307 if (actualReportingMode != expectedReportingMode) { 308 ALOGE("Reporting Mode incorrect: sensor %s handle=%#010" PRIx32 " type=%" PRId32 " " 309 "actual=%d expected=%d", 310 mName.string(), mHandle, mType, actualReportingMode, expectedReportingMode); 311 } 312 } 313 314 // Feature flags 315 // Set DYNAMIC_SENSOR_MASK and ADDITIONAL_INFO_MASK flag here. Compatible with HAL 1_3. 316 if (halVersion >= SENSORS_DEVICE_API_VERSION_1_3) { 317 mFlags |= hwSensor.flags & (DYNAMIC_SENSOR_MASK | ADDITIONAL_INFO_MASK); 318 } 319 // Set DIRECT_REPORT_MASK and DIRECT_CHANNEL_MASK flags. Compatible with HAL 1_3. 320 if (halVersion >= SENSORS_DEVICE_API_VERSION_1_3) { 321 // only on continuous sensors direct report mode is defined 322 if ((mFlags & REPORTING_MODE_MASK) == SENSOR_FLAG_CONTINUOUS_MODE) { 323 mFlags |= hwSensor.flags 324 & (SENSOR_FLAG_MASK_DIRECT_REPORT | SENSOR_FLAG_MASK_DIRECT_CHANNEL); 325 } 326 } 327 // Set DATA_INJECTION flag here. Defined in HAL 1_4. 328 if (halVersion >= SENSORS_DEVICE_API_VERSION_1_4) { 329 mFlags |= (hwSensor.flags & DATA_INJECTION_MASK); 330 } 331 332 if (mRequiredPermission.length() > 0) { 333 // If the sensor is protected by a permission we need to know if it is 334 // a runtime one to determine whether we can use the permission cache. 335 sp<IBinder> binder = defaultServiceManager()->getService(String16("permission")); 336 if (binder != nullptr) { 337 sp<IPermissionController> permCtrl = interface_cast<IPermissionController>(binder); 338 mRequiredPermissionRuntime = permCtrl->isRuntimePermission( 339 String16(mRequiredPermission)); 340 } 341 } 342 } 343 344 Sensor::~Sensor() { 345 } 346 347 const String8& Sensor::getName() const { 348 return mName; 349 } 350 351 const String8& Sensor::getVendor() const { 352 return mVendor; 353 } 354 355 int32_t Sensor::getHandle() const { 356 return mHandle; 357 } 358 359 int32_t Sensor::getType() const { 360 return mType; 361 } 362 363 float Sensor::getMinValue() const { 364 return mMinValue; 365 } 366 367 float Sensor::getMaxValue() const { 368 return mMaxValue; 369 } 370 371 float Sensor::getResolution() const { 372 return mResolution; 373 } 374 375 float Sensor::getPowerUsage() const { 376 return mPower; 377 } 378 379 int32_t Sensor::getMinDelay() const { 380 return mMinDelay; 381 } 382 383 nsecs_t Sensor::getMinDelayNs() const { 384 return getMinDelay() * 1000; 385 } 386 387 int32_t Sensor::getVersion() const { 388 return mVersion; 389 } 390 391 uint32_t Sensor::getFifoReservedEventCount() const { 392 return mFifoReservedEventCount; 393 } 394 395 uint32_t Sensor::getFifoMaxEventCount() const { 396 return mFifoMaxEventCount; 397 } 398 399 const String8& Sensor::getStringType() const { 400 return mStringType; 401 } 402 403 const String8& Sensor::getRequiredPermission() const { 404 return mRequiredPermission; 405 } 406 407 bool Sensor::isRequiredPermissionRuntime() const { 408 return mRequiredPermissionRuntime; 409 } 410 411 int32_t Sensor::getRequiredAppOp() const { 412 return mRequiredAppOp; 413 } 414 415 int32_t Sensor::getMaxDelay() const { 416 return mMaxDelay; 417 } 418 419 uint32_t Sensor::getFlags() const { 420 return mFlags; 421 } 422 423 bool Sensor::isWakeUpSensor() const { 424 return (mFlags & SENSOR_FLAG_WAKE_UP) != 0; 425 } 426 427 bool Sensor::isDynamicSensor() const { 428 return (mFlags & SENSOR_FLAG_DYNAMIC_SENSOR) != 0; 429 } 430 431 bool Sensor::isDataInjectionSupported() const { 432 return (mFlags & SENSOR_FLAG_DATA_INJECTION) != 0; 433 } 434 435 bool Sensor::hasAdditionalInfo() const { 436 return (mFlags & SENSOR_FLAG_ADDITIONAL_INFO) != 0; 437 } 438 439 int32_t Sensor::getHighestDirectReportRateLevel() const { 440 return ((mFlags & SENSOR_FLAG_MASK_DIRECT_REPORT) >> SENSOR_FLAG_SHIFT_DIRECT_REPORT); 441 } 442 443 bool Sensor::isDirectChannelTypeSupported(int32_t sharedMemType) const { 444 switch (sharedMemType) { 445 case SENSOR_DIRECT_MEM_TYPE_ASHMEM: 446 return mFlags & SENSOR_FLAG_DIRECT_CHANNEL_ASHMEM; 447 case SENSOR_DIRECT_MEM_TYPE_GRALLOC: 448 return mFlags & SENSOR_FLAG_DIRECT_CHANNEL_GRALLOC; 449 default: 450 return false; 451 } 452 } 453 454 int32_t Sensor::getReportingMode() const { 455 return ((mFlags & REPORTING_MODE_MASK) >> REPORTING_MODE_SHIFT); 456 } 457 458 const Sensor::uuid_t& Sensor::getUuid() const { 459 return mUuid; 460 } 461 462 void Sensor::setId(int32_t id) { 463 mUuid.i64[0] = id; 464 mUuid.i64[1] = 0; 465 } 466 467 int32_t Sensor::getId() const { 468 return int32_t(mUuid.i64[0]); 469 } 470 471 size_t Sensor::getFlattenedSize() const { 472 size_t fixedSize = 473 sizeof(mVersion) + sizeof(mHandle) + sizeof(mType) + 474 sizeof(mMinValue) + sizeof(mMaxValue) + sizeof(mResolution) + 475 sizeof(mPower) + sizeof(mMinDelay) + sizeof(mFifoMaxEventCount) + 476 sizeof(mFifoMaxEventCount) + sizeof(mRequiredPermissionRuntime) + 477 sizeof(mRequiredAppOp) + sizeof(mMaxDelay) + sizeof(mFlags) + sizeof(mUuid); 478 479 size_t variableSize = 480 sizeof(uint32_t) + FlattenableUtils::align<4>(mName.length()) + 481 sizeof(uint32_t) + FlattenableUtils::align<4>(mVendor.length()) + 482 sizeof(uint32_t) + FlattenableUtils::align<4>(mStringType.length()) + 483 sizeof(uint32_t) + FlattenableUtils::align<4>(mRequiredPermission.length()); 484 485 return fixedSize + variableSize; 486 } 487 488 status_t Sensor::flatten(void* buffer, size_t size) const { 489 if (size < getFlattenedSize()) { 490 return NO_MEMORY; 491 } 492 493 flattenString8(buffer, size, mName); 494 flattenString8(buffer, size, mVendor); 495 FlattenableUtils::write(buffer, size, mVersion); 496 FlattenableUtils::write(buffer, size, mHandle); 497 FlattenableUtils::write(buffer, size, mType); 498 FlattenableUtils::write(buffer, size, mMinValue); 499 FlattenableUtils::write(buffer, size, mMaxValue); 500 FlattenableUtils::write(buffer, size, mResolution); 501 FlattenableUtils::write(buffer, size, mPower); 502 FlattenableUtils::write(buffer, size, mMinDelay); 503 FlattenableUtils::write(buffer, size, mFifoReservedEventCount); 504 FlattenableUtils::write(buffer, size, mFifoMaxEventCount); 505 flattenString8(buffer, size, mStringType); 506 flattenString8(buffer, size, mRequiredPermission); 507 FlattenableUtils::write(buffer, size, mRequiredPermissionRuntime); 508 FlattenableUtils::write(buffer, size, mRequiredAppOp); 509 FlattenableUtils::write(buffer, size, mMaxDelay); 510 FlattenableUtils::write(buffer, size, mFlags); 511 if (mUuid.i64[1] != 0) { 512 // We should never hit this case with our current API, but we 513 // could via a careless API change. If that happens, 514 // this code will keep us from leaking our UUID (while probably 515 // breaking dynamic sensors). See b/29547335. 516 ALOGW("Sensor with UUID being flattened; sending 0. Expect " 517 "bad dynamic sensor behavior"); 518 uuid_t tmpUuid; // default constructor makes this 0. 519 FlattenableUtils::write(buffer, size, tmpUuid); 520 } else { 521 FlattenableUtils::write(buffer, size, mUuid); 522 } 523 return NO_ERROR; 524 } 525 526 status_t Sensor::unflatten(void const* buffer, size_t size) { 527 if (!unflattenString8(buffer, size, mName)) { 528 return NO_MEMORY; 529 } 530 if (!unflattenString8(buffer, size, mVendor)) { 531 return NO_MEMORY; 532 } 533 534 size_t fixedSize1 = 535 sizeof(mVersion) + sizeof(mHandle) + sizeof(mType) + sizeof(mMinValue) + 536 sizeof(mMaxValue) + sizeof(mResolution) + sizeof(mPower) + sizeof(mMinDelay) + 537 sizeof(mFifoMaxEventCount) + sizeof(mFifoMaxEventCount); 538 if (size < fixedSize1) { 539 return NO_MEMORY; 540 } 541 542 FlattenableUtils::read(buffer, size, mVersion); 543 FlattenableUtils::read(buffer, size, mHandle); 544 FlattenableUtils::read(buffer, size, mType); 545 FlattenableUtils::read(buffer, size, mMinValue); 546 FlattenableUtils::read(buffer, size, mMaxValue); 547 FlattenableUtils::read(buffer, size, mResolution); 548 FlattenableUtils::read(buffer, size, mPower); 549 FlattenableUtils::read(buffer, size, mMinDelay); 550 FlattenableUtils::read(buffer, size, mFifoReservedEventCount); 551 FlattenableUtils::read(buffer, size, mFifoMaxEventCount); 552 553 if (!unflattenString8(buffer, size, mStringType)) { 554 return NO_MEMORY; 555 } 556 if (!unflattenString8(buffer, size, mRequiredPermission)) { 557 return NO_MEMORY; 558 } 559 560 size_t fixedSize2 = 561 sizeof(mRequiredPermissionRuntime) + sizeof(mRequiredAppOp) + sizeof(mMaxDelay) + 562 sizeof(mFlags) + sizeof(mUuid); 563 if (size < fixedSize2) { 564 return NO_MEMORY; 565 } 566 567 FlattenableUtils::read(buffer, size, mRequiredPermissionRuntime); 568 FlattenableUtils::read(buffer, size, mRequiredAppOp); 569 FlattenableUtils::read(buffer, size, mMaxDelay); 570 FlattenableUtils::read(buffer, size, mFlags); 571 FlattenableUtils::read(buffer, size, mUuid); 572 return NO_ERROR; 573 } 574 575 void Sensor::flattenString8(void*& buffer, size_t& size, 576 const String8& string8) { 577 uint32_t len = static_cast<uint32_t>(string8.length()); 578 FlattenableUtils::write(buffer, size, len); 579 memcpy(static_cast<char*>(buffer), string8.string(), len); 580 FlattenableUtils::advance(buffer, size, FlattenableUtils::align<4>(len)); 581 } 582 583 bool Sensor::unflattenString8(void const*& buffer, size_t& size, String8& outputString8) { 584 uint32_t len; 585 if (size < sizeof(len)) { 586 return false; 587 } 588 FlattenableUtils::read(buffer, size, len); 589 if (size < len) { 590 return false; 591 } 592 outputString8.setTo(static_cast<char const*>(buffer), len); 593 FlattenableUtils::advance(buffer, size, FlattenableUtils::align<4>(len)); 594 return true; 595 } 596 597 // ---------------------------------------------------------------------------- 598 }; // namespace android 599
