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/**
* Copyright (c) 2015, The CyanogenMod Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.cyanogenmod.platform.internal;
import android.app.ActivityManager;
import android.app.AppGlobals;
import android.content.ComponentName;
import android.content.Context;
import android.content.pm.ApplicationInfo;
import android.os.Binder;
import android.os.Handler;
import android.os.IBinder;
import android.os.IInterface;
import android.os.RemoteException;
import android.os.UserHandle;
import android.text.TextUtils;
import android.util.ArrayMap;
import android.util.Log;
import android.util.Slog;
import com.android.server.SystemService;
import cyanogenmod.app.CMContextConstants;
import cyanogenmod.app.CustomTile;
import cyanogenmod.app.CustomTileListenerService;
import cyanogenmod.app.StatusBarPanelCustomTile;
import cyanogenmod.app.ICustomTileListener;
import cyanogenmod.app.ICMStatusBarManager;
import org.cyanogenmod.internal.statusbar.ExternalQuickSettingsRecord;
import org.cyanogenmod.internal.statusbar.IStatusBarCustomTileHolder;
import java.util.ArrayList;
import org.cyanogenmod.platform.internal.R;
/**
* Internal service which manages interactions with system ui elements
* @hide
*/
public class CMStatusBarManagerService extends SystemService {
private static final String TAG = "CMStatusBarManagerService";
private Handler mHandler = new Handler();
private CustomTileListeners mCustomTileListeners;
static final int MAX_PACKAGE_TILES = 4;
private final ManagedServices.UserProfiles mUserProfiles = new ManagedServices.UserProfiles();
final ArrayList<ExternalQuickSettingsRecord> mQSTileList =
new ArrayList<ExternalQuickSettingsRecord>();
final ArrayMap<String, ExternalQuickSettingsRecord> mCustomTileByKey =
new ArrayMap<String, ExternalQuickSettingsRecord>();
public CMStatusBarManagerService(Context context) {
super(context);
}
@Override
public void onStart() {
Log.d(TAG, "registerCMStatusBar cmstatusbar: " + this);
mCustomTileListeners = new CustomTileListeners();
publishBinderService(CMContextConstants.CM_STATUS_BAR_SERVICE, mService);
}
private final IBinder mService = new ICMStatusBarManager.Stub() {
/**
* @hide
*/
@Override
public void createCustomTileWithTag(String pkg, String opPkg, String tag, int id,
CustomTile customTile, int[] idOut, int userId) throws RemoteException {
enforceCustomTilePublish();
createCustomTileWithTagInternal(pkg, opPkg, Binder.getCallingUid(),
Binder.getCallingPid(), tag, id, customTile, idOut, userId);
}
/**
* @hide
*/
@Override
public void removeCustomTileWithTag(String pkg, String tag, int id, int userId) {
checkCallerIsSystemOrSameApp(pkg);
userId = ActivityManager.handleIncomingUser(Binder.getCallingPid(),
Binder.getCallingUid(), userId, true, false, "cancelCustomTileWithTag", pkg);
removeCustomTileWithTagInternal(Binder.getCallingUid(),
Binder.getCallingPid(), pkg, tag, id, userId, null);
}
/**
* Register a listener binder directly with the status bar manager.
*
* Only works with system callers. Apps should extend
* {@link cyanogenmod.app.CustomTileListenerService}.
* @hide
*/
@Override
public void registerListener(final ICustomTileListener listener,
final ComponentName component, final int userid) {
enforceBindCustomTileListener();
mCustomTileListeners.registerService(listener, component, userid);
// Notify registered tiles
try {
for (ExternalQuickSettingsRecord qsTile : mQSTileList) {
if (userid == UserHandle.USER_ALL || qsTile.getUserId() == userid) {
listener.onCustomTilePosted(new StatusBarCustomTileHolder(qsTile.sbTile));
}
}
} catch (RemoteException re) {
// Ignore
}
}
/**
* Remove a listener binder directly
* @hide
*/
@Override
public void unregisterListener(ICustomTileListener listener, int userid) {
enforceBindCustomTileListener();
mCustomTileListeners.unregisterService(listener, userid);
}
/**
* Allow an ICustomTileListener to simulate clearing (dismissing) a single customTile.
*
* @param token The binder for the listener, to check that the caller is allowed
*/
@Override
public void removeCustomTileFromListener(ICustomTileListener token, String pkg,
String tag, int id) {
final int callingUid = Binder.getCallingUid();
final int callingPid = Binder.getCallingPid();
long identity = Binder.clearCallingIdentity();
try {
synchronized (mQSTileList) {
final ManagedServices.ManagedServiceInfo info
= mCustomTileListeners.checkServiceTokenLocked(token);
removeCustomTileFromListenerLocked(info, callingUid, callingPid,
pkg, tag, id, info.userid);
}
} finally {
Binder.restoreCallingIdentity(identity);
}
}
};
void createCustomTileWithTagInternal(final String pkg, final String opPkg, final int callingUid,
final int callingPid, final String tag, final int id, final CustomTile customTile,
final int[] idOut, final int incomingUserId) {
if (pkg == null || customTile == null) {
throw new IllegalArgumentException("null not allowed: pkg=" + pkg
+ " id=" + id + " customTile=" + customTile);
}
final int userId = ActivityManager.handleIncomingUser(callingPid,
callingUid, incomingUserId, true, false, "createCustomTileWithTag", pkg);
final UserHandle user = new UserHandle(userId);
// remove custom tile call ends up in not removing the custom tile.
mHandler.post(new Runnable() {
@Override
public void run() {
// Obtain the resources package name
String resPkg = customTile.getResourcesPackageName();
if (TextUtils.isEmpty(resPkg)) {
resPkg = pkg;
}
final StatusBarPanelCustomTile sbc = new StatusBarPanelCustomTile(
pkg, resPkg, opPkg, id, tag, callingUid, callingPid, customTile, user);
ExternalQuickSettingsRecord r = new ExternalQuickSettingsRecord(sbc);
ExternalQuickSettingsRecord old = mCustomTileByKey.get(sbc.getKey());
int index = indexOfQsTileLocked(sbc.getKey());
if (index < 0) {
// If this tile unknown to us, check DOS protection
if (checkDosProtection(pkg, callingUid, userId)) return;
mQSTileList.add(r);
} else {
old = mQSTileList.get(index);
mQSTileList.set(index, r);
r.isUpdate = true;
}
mCustomTileByKey.put(sbc.getKey(), r);
if (customTile.icon != 0 || customTile.remoteIcon != null) {
StatusBarPanelCustomTile oldSbn = (old != null) ? old.sbTile : null;
mCustomTileListeners.notifyPostedLocked(sbc, oldSbn);
} else {
Slog.e(TAG, "Not posting custom tile with no icon set: " + customTile);
if (old != null && !old.isCanceled) {
mCustomTileListeners.notifyRemovedLocked(sbc);
}
}
}
});
idOut[0] = id;
}
private boolean checkDosProtection(String pkg, int callingUid, int userId) {
final boolean isSystemTile = isUidSystem(callingUid) || ("android".equals(pkg));
// Limit the number of Custom tiles that any given package except the android
// package or a registered listener can enqueue. Prevents DOS attacks and deals with leaks.
if (!isSystemTile) {
synchronized (mQSTileList) {
int count = 0;
final int N = mQSTileList.size();
for (int i = 0; i < N; i++) {
final ExternalQuickSettingsRecord r = mQSTileList.get(i);
if (r.sbTile.getPackage().equals(pkg) && r.sbTile.getUserId() == userId) {
count++;
if (count >= MAX_PACKAGE_TILES) {
Slog.e(TAG, "Package has already posted " + count
+ " custom tiles. Not showing more. package=" + pkg);
return true;
}
}
}
}
}
return false;
}
// lock on mQSTileList
int indexOfQsTileLocked(String key) {
final int N = mQSTileList.size();
for (int i = 0; i < N; i++) {
if (key.equals(mQSTileList.get(i).getKey())) {
return i;
}
}
return -1;
}
// lock on mQSTileList
int indexOfQsTileLocked(String pkg, String tag, int id, int userId) {
ArrayList<ExternalQuickSettingsRecord> list = mQSTileList;
final int len = list.size();
for (int i = 0; i < len; i++) {
ExternalQuickSettingsRecord r = list.get(i);
if (!customTileMatchesUserId(r, userId) || r.sbTile.getId() != id) {
continue;
}
if (tag == null) {
if (r.sbTile.getTag() != null) {
continue;
}
} else {
if (!tag.equals(r.sbTile.getTag())) {
continue;
}
}
if (r.sbTile.getPackage().equals(pkg)) {
return i;
}
}
return -1;
}
private static void checkCallerIsSystemOrSameApp(String pkg) {
if (isCallerSystem()) {
return;
}
final int uid = Binder.getCallingUid();
try {
ApplicationInfo ai = AppGlobals.getPackageManager().getApplicationInfo(
pkg, 0, UserHandle.getCallingUserId());
if (ai == null) {
throw new SecurityException("Unknown package " + pkg);
}
if (!UserHandle.isSameApp(ai.uid, uid)) {
throw new SecurityException("Calling uid " + uid + " gave package"
+ pkg + " which is owned by uid " + ai.uid);
}
} catch (RemoteException re) {
throw new SecurityException("Unknown package " + pkg + "\n" + re);
}
}
private static boolean isUidSystem(int uid) {
final int appid = UserHandle.getAppId(uid);
return (appid == android.os.Process.SYSTEM_UID
|| appid == android.os.Process.PHONE_UID || uid == 0);
}
private static boolean isCallerSystem() {
return isUidSystem(Binder.getCallingUid());
}
/**
* Determine whether the userId applies to the custom tile in question, either because
* they match exactly, or one of them is USER_ALL (which is treated as a wildcard).
*/
private boolean customTileMatchesUserId(ExternalQuickSettingsRecord r, int userId) {
return
// looking for USER_ALL custom tile? match everything
userId == UserHandle.USER_ALL
// a custom tile sent to USER_ALL matches any query
|| r.getUserId() == UserHandle.USER_ALL
// an exact user match
|| r.getUserId() == userId;
}
private void removeCustomTileFromListenerLocked(ManagedServices.ManagedServiceInfo info,
int callingUid, int callingPid, String pkg, String tag, int id, int userId) {
removeCustomTileWithTagInternal(callingUid, callingPid, pkg, tag, id, userId, info);
}
void removeCustomTileWithTagInternal(final int callingUid, final int callingPid,
final String pkg, final String tag, final int id, final int userId,
final ManagedServices.ManagedServiceInfo listener) {
mHandler.post(new Runnable() {
@Override
public void run() {
synchronized (mQSTileList) {
int index = indexOfQsTileLocked(pkg, tag, id, userId);
if (index >= 0) {
ExternalQuickSettingsRecord r = mQSTileList.get(index);
mQSTileList.remove(index);
// status bar
r.isCanceled = true;
mCustomTileListeners.notifyRemovedLocked(r.sbTile);
mCustomTileByKey.remove(r.sbTile.getKey());
}
}
}
});
}
private void enforceSystemOrSystemUI(String message) {
if (isCallerSystem()) return;
mContext.enforceCallingPermission(android.Manifest.permission.STATUS_BAR_SERVICE,
message);
}
private void enforceCustomTilePublish() {
mContext.enforceCallingOrSelfPermission(
cyanogenmod.platform.Manifest.permission.PUBLISH_CUSTOM_TILE,
"StatusBarManagerService");
}
private void enforceBindCustomTileListener() {
mContext.enforceCallingOrSelfPermission(
cyanogenmod.platform.Manifest.permission.BIND_CUSTOM_TILE_LISTENER_SERVICE,
"StatusBarManagerService");
}
private boolean isVisibleToListener(StatusBarPanelCustomTile sbc,
ManagedServices.ManagedServiceInfo listener) {
return listener.enabledAndUserMatches(sbc.getUserId());
}
public class CustomTileListeners extends ManagedServices {
public CustomTileListeners() {
super(CMStatusBarManagerService.this.mContext, mHandler, mQSTileList, mUserProfiles);
}
@Override
protected Config getConfig() {
Config c = new Config();
c.caption = "custom tile listener";
c.serviceInterface = CustomTileListenerService.SERVICE_INTERFACE;
//TODO: Implement this in the future
//c.secureSettingName = Settings.Secure.ENABLED_CUSTOM_TILE_LISTENERS;
c.bindPermission =
cyanogenmod.platform.Manifest.permission.BIND_CUSTOM_TILE_LISTENER_SERVICE;
//TODO: Implement this in the future
//c.settingsAction = Settings.ACTION_CUSTOM_TILE_LISTENER_SETTINGS;
c.clientLabel = R.string.custom_tile_listener_binding_label;
return c;
}
@Override
protected IInterface asInterface(IBinder binder) {
return ICustomTileListener.Stub.asInterface(binder);
}
@Override
public void onServiceAdded(ManagedServiceInfo info) {
final ICustomTileListener listener = (ICustomTileListener) info.service;
try {
listener.onListenerConnected();
} catch (RemoteException e) {
// we tried
}
}
@Override
protected void onServiceRemovedLocked(ManagedServiceInfo removed) {
}
/**
* asynchronously notify all listeners about a new custom tile
*
* <p>
* Also takes care of removing a custom tile that has been visible to a listener before,
* but isn't anymore.
*/
public void notifyPostedLocked(StatusBarPanelCustomTile sbc,
StatusBarPanelCustomTile oldSbc) {
// Lazily initialized snapshots of the custom tile.
StatusBarPanelCustomTile sbcClone = null;
for (final ManagedServiceInfo info : mServices) {
boolean sbnVisible = isVisibleToListener(sbc, info);
boolean oldSbnVisible = oldSbc != null ? isVisibleToListener(oldSbc, info) : false;
// This custom tile hasn't been and still isn't visible -> ignore.
if (!oldSbnVisible && !sbnVisible) {
continue;
}
// This custom tile became invisible -> remove the old one.
if (oldSbnVisible && !sbnVisible) {
final StatusBarPanelCustomTile oldSbcClone = oldSbc.clone();
mHandler.post(new Runnable() {
@Override
public void run() {
notifyRemoved(info, oldSbcClone);
}
});
continue;
}
sbcClone = sbc.clone();
final StatusBarPanelCustomTile sbcToPost = sbcClone;
mHandler.post(new Runnable() {
@Override
public void run() {
notifyPosted(info, sbcToPost);
}
});
}
}
/**
* asynchronously notify all listeners about a removed custom tile
*/
public void notifyRemovedLocked(StatusBarPanelCustomTile sbc) {
// make a copy in case changes are made to the underlying CustomTile object
final StatusBarPanelCustomTile sbcClone = sbc.clone();
for (final ManagedServiceInfo info : mServices) {
if (!isVisibleToListener(sbcClone, info)) {
continue;
}
mHandler.post(new Runnable() {
@Override
public void run() {
notifyRemoved(info, sbcClone);
}
});
}
}
private void notifyPosted(final ManagedServiceInfo info,
final StatusBarPanelCustomTile sbc) {
final ICustomTileListener listener = (ICustomTileListener)info.service;
StatusBarCustomTileHolder sbcHolder = new StatusBarCustomTileHolder(sbc);
try {
listener.onCustomTilePosted(sbcHolder);
} catch (RemoteException ex) {
Log.e(TAG, "unable to notify listener (posted): " + listener, ex);
}
}
private void notifyRemoved(ManagedServiceInfo info, StatusBarPanelCustomTile sbc) {
if (!info.enabledAndUserMatches(sbc.getUserId())) {
return;
}
final ICustomTileListener listener = (ICustomTileListener) info.service;
StatusBarCustomTileHolder sbcHolder = new StatusBarCustomTileHolder(sbc);
try {
listener.onCustomTileRemoved(sbcHolder);
} catch (RemoteException ex) {
Log.e(TAG, "unable to notify listener (removed): " + listener, ex);
}
}
}
/**
* Wrapper for a StatusBarPanelCustomTile object that allows transfer across a oneway
* binder without sending large amounts of data over a oneway transaction.
*/
private static final class StatusBarCustomTileHolder
extends IStatusBarCustomTileHolder.Stub {
private StatusBarPanelCustomTile mValue;
public StatusBarCustomTileHolder(StatusBarPanelCustomTile value) {
mValue = value;
}
/** Get the held value and clear it. This function should only be called once per holder */
@Override
public StatusBarPanelCustomTile get() {
StatusBarPanelCustomTile value = mValue;
mValue = null;
return value;
}
}
}
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