| /* |
| * Copyright (C) 2019 The Android Open Source 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 com.android.server.usb; |
| |
| import android.annotation.NonNull; |
| import android.annotation.UserIdInt; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.pm.UserInfo; |
| import android.hardware.usb.UsbAccessory; |
| import android.hardware.usb.UsbDevice; |
| import android.hardware.usb.UsbManager; |
| import android.os.UserHandle; |
| import android.os.UserManager; |
| import android.service.usb.UsbSettingsManagerProto; |
| import android.util.Slog; |
| import android.util.SparseArray; |
| |
| import com.android.internal.annotations.GuardedBy; |
| import com.android.internal.util.dump.DualDumpOutputStream; |
| |
| import java.util.List; |
| |
| class UsbPermissionManager { |
| private static final String LOG_TAG = UsbPermissionManager.class.getSimpleName(); |
| private static final boolean DEBUG = false; |
| |
| /** Context to be used by this module */ |
| private final @NonNull Context mContext; |
| |
| /** Map from user id to {@link UsbUserPermissionManager} for the user */ |
| @GuardedBy("mPermissionsByUser") |
| private final SparseArray<UsbUserPermissionManager> mPermissionsByUser = new SparseArray<>(); |
| |
| final UsbService mUsbService; |
| |
| UsbPermissionManager(@NonNull Context context, |
| @NonNull UsbService usbService) { |
| mContext = context; |
| mUsbService = usbService; |
| } |
| |
| @NonNull UsbUserPermissionManager getPermissionsForUser(@UserIdInt int userId) { |
| synchronized (mPermissionsByUser) { |
| UsbUserPermissionManager permissions = mPermissionsByUser.get(userId); |
| if (permissions == null) { |
| permissions = new UsbUserPermissionManager(mContext.createContextAsUser( |
| UserHandle.of(userId), 0), mUsbService.getSettingsForUser(userId)); |
| mPermissionsByUser.put(userId, permissions); |
| } |
| return permissions; |
| } |
| } |
| |
| @NonNull UsbUserPermissionManager getPermissionsForUser(@NonNull UserHandle user) { |
| return getPermissionsForUser(user.getIdentifier()); |
| } |
| |
| void remove(@NonNull UserHandle userToRemove) { |
| synchronized (mPermissionsByUser) { |
| mPermissionsByUser.remove(userToRemove.getIdentifier()); |
| } |
| } |
| |
| /** |
| * Remove temporary access permission and broadcast that a device was removed. |
| * |
| * @param device The device that is removed |
| */ |
| void usbDeviceRemoved(@NonNull UsbDevice device) { |
| synchronized (mPermissionsByUser) { |
| for (int i = 0; i < mPermissionsByUser.size(); i++) { |
| // clear temporary permissions for the device |
| mPermissionsByUser.valueAt(i).removeDevicePermissions(device); |
| } |
| } |
| |
| Intent intent = new Intent(UsbManager.ACTION_USB_DEVICE_DETACHED); |
| intent.addFlags(Intent.FLAG_RECEIVER_INCLUDE_BACKGROUND); |
| intent.putExtra(UsbManager.EXTRA_DEVICE, device); |
| |
| if (DEBUG) { |
| Slog.d(LOG_TAG, "usbDeviceRemoved, sending " + intent); |
| } |
| mContext.sendBroadcastAsUser(intent, UserHandle.ALL); |
| } |
| |
| /** |
| * Remove temporary access permission and broadcast that a accessory was removed. |
| * |
| * @param accessory The accessory that is removed |
| */ |
| void usbAccessoryRemoved(@NonNull UsbAccessory accessory) { |
| synchronized (mPermissionsByUser) { |
| for (int i = 0; i < mPermissionsByUser.size(); i++) { |
| // clear temporary permissions for the accessory |
| mPermissionsByUser.valueAt(i).removeAccessoryPermissions(accessory); |
| } |
| } |
| |
| Intent intent = new Intent(UsbManager.ACTION_USB_ACCESSORY_DETACHED); |
| intent.addFlags(Intent.FLAG_RECEIVER_INCLUDE_BACKGROUND); |
| intent.putExtra(UsbManager.EXTRA_ACCESSORY, accessory); |
| mContext.sendBroadcastAsUser(intent, UserHandle.ALL); |
| } |
| |
| void dump(@NonNull DualDumpOutputStream dump, String idName, long id) { |
| long token = dump.start(idName, id); |
| UserManager userManager = mContext.getSystemService(UserManager.class); |
| synchronized (mPermissionsByUser) { |
| List<UserInfo> users = userManager.getUsers(); |
| int numUsers = users.size(); |
| for (int i = 0; i < numUsers; i++) { |
| getPermissionsForUser(users.get(i).id).dump(dump, "user_permissions", |
| UsbSettingsManagerProto.USER_SETTINGS); |
| } |
| } |
| dump.end(token); |
| } |
| |
| } |