Support restricted mode in SensorService.
In restricted mode, only CTS tests can register for sensors or call flush() on them. The requests
from other applications will be ignored.
Change-Id: Ieb923df3e0cfe3390fe2d052af776da79589744b
diff --git a/services/sensorservice/SensorService.h b/services/sensorservice/SensorService.h
index e9ca3a5..b31eaf3 100644
--- a/services/sensorservice/SensorService.h
+++ b/services/sensorservice/SensorService.h
@@ -27,6 +27,7 @@
#include <utils/AndroidThreads.h>
#include <utils/RefBase.h>
#include <utils/Looper.h>
+#include <utils/String8.h>
#include <binder/BinderService.h>
@@ -65,6 +66,27 @@
{
friend class BinderService<SensorService>;
+ enum Mode {
+ // The regular operating mode where any application can register/unregister/call flush on
+ // sensors.
+ NORMAL = 0,
+ // This mode is used only for testing sensors. Each sensor can be tested in isolation with
+ // the required sampling_rate and maxReportLatency parameters without having to think about
+ // the data rates requested by other applications. End user devices are always expected to be
+ // in NORMAL mode. When this mode is first activated, all active sensors from all connections
+ // are disabled. Calling flush() will return an error. In this mode, only the requests from
+ // selected apps whose package names are whitelisted are allowed (typically CTS apps). Only
+ // these apps can register/unregister/call flush() on sensors. If SensorService switches to
+ // NORMAL mode again, all sensors that were previously registered to are activated with the
+ // corresponding paramaters if the application hasn't unregistered for sensors in the mean
+ // time.
+ // NOTE: Non whitelisted app whose sensors were previously deactivated may still receive
+ // events if a whitelisted app requests data from the same sensor.
+ RESTRICTED,
+ // TODO: This mode hasn't been implemented yet.
+ DATA_INJECTION
+ };
+
static const char* WAKE_LOCK_NAME;
static char const* getServiceName() ANDROID_API { return "sensorservice"; }
@@ -78,7 +100,7 @@
// ISensorServer interface
virtual Vector<Sensor> getSensorList();
- virtual sp<ISensorEventConnection> createSensorEventConnection();
+ virtual sp<ISensorEventConnection> createSensorEventConnection(const String8& packageName);
virtual status_t dump(int fd, const Vector<String16>& args);
class SensorEventConnection : public BnSensorEventConnection, public LooperCallback {
@@ -133,7 +155,6 @@
// connection FD may be added to the Looper. The flags to set are determined by the internal
// state of the connection. FDs are added to the looper when wake-up sensors are registered
// (to poll for acknowledgements) and when write fails on the socket when there are too many
- // events (to poll when the FD is available for writing). FDs are removed when there is an
// error and the other end hangs up or when this client unregisters for this connection.
void updateLooperRegistration(const sp<Looper>& looper);
void updateLooperRegistrationLocked(const sp<Looper>& looper);
@@ -169,6 +190,7 @@
KeyedVector<int, FlushInfo> mSensorInfo;
sensors_event_t *mEventCache;
int mCacheSize, mMaxCacheSize;
+ String8 mPackageName;
#if DEBUG_CONNECTIONS
int mEventsReceived, mEventsSent, mEventsSentFromCache;
@@ -176,7 +198,7 @@
#endif
public:
- SensorEventConnection(const sp<SensorService>& service, uid_t uid);
+ SensorEventConnection(const sp<SensorService>& service, uid_t uid, String8 packageName);
status_t sendEvents(sensors_event_t const* buffer, size_t count,
sensors_event_t* scratch,
@@ -190,6 +212,7 @@
void dump(String8& result);
bool needsWakeLock();
void resetWakeLockRefCount();
+ String8 getPackageName() const;
uid_t getUid() const { return mUid; }
};
@@ -208,6 +231,7 @@
void addPendingFlushConnection(const sp<SensorEventConnection>& connection);
void removeFirstPendingFlushConnection();
SensorEventConnection * getFirstPendingFlushConnection();
+ void clearAllPendingFlushConnections();
};
class SensorEventAckReceiver : public Thread {
@@ -261,6 +285,11 @@
// to the output vector.
void populateActiveConnections(SortedVector< sp<SensorEventConnection> >* activeConnections);
+ // If SensorService is operating in RESTRICTED mode, only select whitelisted packages are
+ // allowed to register for or call flush on sensors. Typically only cts test packages are
+ // allowed.
+ bool isWhiteListedPackage(const String8& packageName);
+
// constants
Vector<Sensor> mSensorList;
Vector<Sensor> mUserSensorListDebug;
@@ -282,6 +311,7 @@
bool mWakeLockAcquired;
sensors_event_t *mSensorEventBuffer, *mSensorEventScratch;
SensorEventConnection const **mMapFlushEventsToConnections;
+ Mode mMode;
// The size of this vector is constant, only the items are mutable
KeyedVector<int32_t, sensors_event_t> mLastEventSeen;