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/*
* Copyright (C) 2022 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;
import android.content.AttributionSource;
import android.content.Context;
import android.os.Binder;
import android.os.Process;
import android.os.RemoteException;
import android.util.Log;
import com.android.modules.utils.BasicShellCommandHandler;
import java.io.PrintWriter;
class BluetoothShellCommand extends BasicShellCommandHandler {
private static final String TAG = "BluetoothShellCommand";
private final BluetoothManagerService mManagerService;
private final Context mContext;
private final BluetoothCommand[] mBluetoothCommands = {
new Enable(),
new Disable(),
};
private abstract class BluetoothCommand {
abstract String getName();
// require root permission by default, can be override in command implementation
boolean isPrivileged() {
return true;
}
abstract int exec(PrintWriter pw) throws RemoteException;
}
private class Enable extends BluetoothCommand {
@Override
String getName() {
return "enable";
}
@Override
boolean isPrivileged() {
return false;
}
@Override
public int exec(PrintWriter pw) throws RemoteException {
pw.println("Enabling Bluetooth");
return mManagerService.enable(AttributionSource.myAttributionSource()) ? 0 : -1;
}
}
private class Disable extends BluetoothCommand {
@Override
String getName() {
return "disable";
}
@Override
boolean isPrivileged() {
return false;
}
@Override
public int exec(PrintWriter pw) throws RemoteException {
pw.println("Disabling Bluetooth");
return mManagerService.disable(AttributionSource.myAttributionSource(), true) ? 0 : -1;
}
}
BluetoothShellCommand(BluetoothManagerService managerService, Context context) {
mManagerService = managerService;
mContext = context;
}
@Override
public int onCommand(String cmd) {
if (cmd == null) {
return handleDefaultCommands(null);
}
for (BluetoothCommand bt_cmd : mBluetoothCommands) {
if (cmd.equals(bt_cmd.getName())) {
if (bt_cmd.isPrivileged()) {
final int uid = Binder.getCallingUid();
if (uid != Process.ROOT_UID) {
throw new SecurityException("Uid " + uid + " does not have access to "
+ cmd + " bluetooth command (or such command doesn't exist)");
}
}
try {
return bt_cmd.exec(getOutPrintWriter());
} catch (RemoteException e) {
Log.w(TAG, cmd + ": error\nException: " + e.getMessage());
getErrPrintWriter().println(cmd + ": error\nException: " + e.getMessage());
e.rethrowFromSystemServer();
}
}
}
return handleDefaultCommands(cmd);
}
@Override
public void onHelp() {
PrintWriter pw = getOutPrintWriter();
pw.println("Bluetooth Commands:");
pw.println(" help or -h");
pw.println(" Print this help text.");
pw.println(" enable");
pw.println(" Enable Bluetooth on this device.");
pw.println(" disable");
pw.println(" Disable Bluetooth on this device.");
}
}
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