/*
* Copyright (C) 2014 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 an
* limitations under the License.
*/
package com.android.server.midi;
import android.bluetooth.BluetoothDevice;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.content.pm.ServiceInfo;
import android.content.res.XmlResourceParser;
import android.media.midi.IBluetoothMidiService;
import android.media.midi.IMidiDeviceListener;
import android.media.midi.IMidiDeviceOpenCallback;
import android.media.midi.IMidiDeviceServer;
import android.media.midi.IMidiManager;
import android.media.midi.MidiDeviceInfo;
import android.media.midi.MidiDeviceService;
import android.media.midi.MidiDeviceStatus;
import android.media.midi.MidiManager;
import android.os.Binder;
import android.os.Bundle;
import android.os.IBinder;
import android.os.Process;
import android.os.RemoteException;
import android.os.UserHandle;
import android.util.Log;
import com.android.internal.content.PackageMonitor;
import com.android.internal.util.IndentingPrintWriter;
import com.android.internal.util.XmlUtils;
import com.android.server.SystemService;
import org.xmlpull.v1.XmlPullParser;
import java.io.FileDescriptor;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
public class MidiService extends IMidiManager.Stub {
public static class Lifecycle extends SystemService {
private MidiService mMidiService;
public Lifecycle(Context context) {
super(context);
}
@Override
public void onStart() {
mMidiService = new MidiService(getContext());
publishBinderService(Context.MIDI_SERVICE, mMidiService);
}
@Override
public void onUnlockUser(int userHandle) {
if (userHandle == UserHandle.USER_SYSTEM) {
mMidiService.onUnlockUser();
}
}
}
private static final String TAG = "MidiService";
private final Context mContext;
// list of all our clients, keyed by Binder token
private final HashMap<IBinder, Client> mClients = new HashMap<IBinder, Client>();
// list of all devices, keyed by MidiDeviceInfo
private final HashMap<MidiDeviceInfo, Device> mDevicesByInfo
= new HashMap<MidiDeviceInfo, Device>();
// list of all Bluetooth devices, keyed by BluetoothDevice
private final HashMap<BluetoothDevice, Device> mBluetoothDevices
= new HashMap<BluetoothDevice, Device>();
// list of all devices, keyed by IMidiDeviceServer
private final HashMap<IBinder, Device> mDevicesByServer = new HashMap<IBinder, Device>();
// used for assigning IDs to MIDI devices
private int mNextDeviceId = 1;
private final PackageManager mPackageManager;
// UID of BluetoothMidiService
private int mBluetoothServiceUid;
// PackageMonitor for listening to package changes
private final PackageMonitor mPackageMonitor = new PackageMonitor() {
@Override
public void onPackageAdded(String packageName, int uid) {
addPackageDeviceServers(packageName);
}
@Override
public void onPackageModified(String packageName) {
removePackageDeviceServers(packageName);
addPackageDeviceServers(packageName);
}
@Override
public void onPackageRemoved(String packageName, int uid) {
removePackageDeviceServers(packageName);
}
};
private final class Client implements IBinder.DeathRecipient {
// Binder token for this client
private final IBinder mToken;
// This client's UID
private final int mUid;
// This client's PID
private final int mPid;
// List of all receivers for this client
private final HashMap<IBinder, IMidiDeviceListener> mListeners
= new HashMap<IBinder, IMidiDeviceListener>();
// List of all device connections for this client
private final HashMap<IBinder, DeviceConnection> mDeviceConnections
= new HashMap<IBinder, DeviceConnection>();
public Client(IBinder token) {
mToken = token;
mUid = Binder.getCallingUid();
mPid = Binder.getCallingPid();
}
public int getUid() {
return mUid;
}
public void addListener(IMidiDeviceListener listener) {
// Use asBinder() so that we can match it in removeListener().
// The listener proxy objects themselves do not match.
mListeners.put(listener.asBinder(), listener);
}
public void removeListener(IMidiDeviceListener listener) {
mListeners.remove(listener.asBinder());
if (mListeners.size() == 0 && mDeviceConnections.size() == 0) {
close();
}
}
public void addDeviceConnection(Device device, IMidiDeviceOpenCallback callback) {
DeviceConnection connection = new DeviceConnection(device, this, callback);
mDeviceConnections.put(connection.getToken(), connection);
device.addDeviceConnection(connection);
}
// called from MidiService.closeDevice()
public void removeDeviceConnection(IBinder token) {
DeviceConnection connection = mDeviceConnections.remove(token);
if (connection != null) {
connection.getDevice().removeDeviceConnection(connection);
}
if (mListeners.size() == 0 && mDeviceConnections.size() == 0) {
close();
}
}
// called from Device.close()
public void removeDeviceConnection(DeviceConnection connection) {
mDeviceConnections.remove(connection.getToken());
if (mListeners.size() == 0 && mDeviceConnections.size() == 0) {
close();
}
}
public void deviceAdded(Device device) {
// ignore private devices that our client cannot access
if (!device.isUidAllowed(mUid)) return;
MidiDeviceInfo deviceInfo = device.getDeviceInfo();
try {
for (IMidiDeviceListener listener : mListeners.values()) {
listener.onDeviceAdded(deviceInfo);
}
} catch (RemoteException e) {
Log.e(TAG, "remote exception", e);
}
}
public void deviceRemoved(Device device) {
// ignore private devices that our client cannot access
if (!device.isUidAllowed(mUid)) return;
MidiDeviceInfo deviceInfo = device.getDeviceInfo();
try {
for (IMidiDeviceListener listener : mListeners.values()) {
listener.onDeviceRemoved(deviceInfo);
}
} catch (RemoteException e) {
Log.e(TAG, "remote exception", e);
}
}
public void deviceStatusChanged(Device device, MidiDeviceStatus status) {
// ignore private devices that our client cannot access
if (!device.isUidAllowed(mUid)) return;
try {
for (IMidiDeviceListener listener : mListeners.values()) {
listener.onDeviceStatusChanged(status);
}
} catch (RemoteException e) {
Log.e(TAG, "remote exception", e);
}
}
private void close() {
synchronized (mClients) {
mClients.remove(mToken);
mToken.unlinkToDeath(this, 0);
}
for (DeviceConnection connection : mDeviceConnections.values()) {
connection.getDevice().removeDeviceConnection(connection);
}
}
@Override
public void binderDied() {
Log.d(TAG, "Client died: " + this);
close();
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder("Client: UID: ");
sb.append(mUid);
sb.append(" PID: ");
sb.append(mPid);
sb.append(" listener count: ");
sb.append(mListeners.size());
sb.append(" Device Connections:");
for (DeviceConnection connection : mDeviceConnections.values()) {
sb.append(" <device ");
sb.append(connection.getDevice().getDeviceInfo().getId());
sb.append(">");
}
return sb.toString();
}
}
private Client getClient(IBinder token) {
synchronized (mClients) {
Client client = mClients.get(token);
if (client == null) {
client = new Client(token);
try {
token.linkToDeath(client, 0);
} catch (RemoteException e) {
return null;
}
mClients.put(token, client);
}
return client;
}
}
private final class Device implements IBinder.DeathRecipient {
private IMidiDeviceServer mServer;
private MidiDeviceInfo mDeviceInfo;
private final BluetoothDevice mBluetoothDevice;
private MidiDeviceStatus mDeviceStatus;
// ServiceInfo for the device's MidiDeviceServer implementation (virtual devices only)
private final ServiceInfo mServiceInfo;
// UID of device implementation
private final int mUid;
// ServiceConnection for implementing Service (virtual devices only)
// mServiceConnection is non-null when connected or attempting to connect to the service
private ServiceConnection mServiceConnection;
// List of all device connections for this device
private final ArrayList<DeviceConnection> mDeviceConnections
= new ArrayList<DeviceConnection>();
public Device(IMidiDeviceServer server, MidiDeviceInfo deviceInfo,
ServiceInfo serviceInfo, int uid) {
mDeviceInfo = deviceInfo;
mServiceInfo = serviceInfo;
mUid = uid;
mBluetoothDevice = (BluetoothDevice)deviceInfo.getProperties().getParcelable(
MidiDeviceInfo.PROPERTY_BLUETOOTH_DEVICE);;
setDeviceServer(server);
}
public Device(BluetoothDevice bluetoothDevice) {
mBluetoothDevice = bluetoothDevice;
mServiceInfo = null;
mUid = mBluetoothServiceUid;
}
private void setDeviceServer(IMidiDeviceServer server) {
if (server != null) {
if (mServer != null) {
Log.e(TAG, "mServer already set in setDeviceServer");
return;
}
IBinder binder = server.asBinder();
try {
if (mDeviceInfo == null) {
mDeviceInfo = server.getDeviceInfo();
}
binder.linkToDeath(this, 0);
mServer = server;
} catch (RemoteException e) {
mServer = null;
return;
}
mDevicesByServer.put(binder, this);
} else if (mServer != null) {
server = mServer;
mServer = null;
IBinder binder = server.asBinder();
mDevicesByServer.remove(binder);
try {
server.closeDevice();
binder.unlinkToDeath(this, 0);
} catch (RemoteException e) {
// nothing to do here
}
}
if (mDeviceConnections != null) {
for (DeviceConnection connection : mDeviceConnections) {
connection.notifyClient(server);
}
}
}
public MidiDeviceInfo getDeviceInfo() {
return mDeviceInfo;
}
// only used for bluetooth devices, which are created before we have a MidiDeviceInfo
public void setDeviceInfo(MidiDeviceInfo deviceInfo) {
mDeviceInfo = deviceInfo;
}
public MidiDeviceStatus getDeviceStatus() {
return mDeviceStatus;
}
public void setDeviceStatus(MidiDeviceStatus status) {
mDeviceStatus = status;
}
public IMidiDeviceServer getDeviceServer() {
return mServer;
}
public ServiceInfo getServiceInfo() {
return mServiceInfo;
}
public String getPackageName() {
return (mServiceInfo == null ? null : mServiceInfo.packageName);
}
public int getUid() {
return mUid;
}
public boolean isUidAllowed(int uid) {
return (!mDeviceInfo.isPrivate() || mUid == uid);
}
public void addDeviceConnection(DeviceConnection connection) {
synchronized (mDeviceConnections) {
if (mServer != null) {
mDeviceConnections.add(connection);
connection.notifyClient(mServer);
} else if (mServiceConnection == null &&
(mServiceInfo != null || mBluetoothDevice != null)) {
mDeviceConnections.add(connection);
mServiceConnection = new ServiceConnection() {
@Override
public void onServiceConnected(ComponentName name, IBinder service) {
IMidiDeviceServer server = null;
if (mBluetoothDevice != null) {
IBluetoothMidiService mBluetoothMidiService = IBluetoothMidiService.Stub.asInterface(service);
try {
// We need to explicitly add the device in a separate method
// because onBind() is only called once.
IBinder deviceBinder = mBluetoothMidiService.addBluetoothDevice(mBluetoothDevice);
server = IMidiDeviceServer.Stub.asInterface(deviceBinder);
} catch(RemoteException e) {
Log.e(TAG, "Could not call addBluetoothDevice()", e);
}
} else {
server = IMidiDeviceServer.Stub.asInterface(service);
}
setDeviceServer(server);
}
@Override
public void onServiceDisconnected(ComponentName name) {
setDeviceServer(null);
mServiceConnection = null;
}
};
Intent intent;
if (mBluetoothDevice != null) {
intent = new Intent(MidiManager.BLUETOOTH_MIDI_SERVICE_INTENT);
intent.setComponent(new ComponentName(
MidiManager.BLUETOOTH_MIDI_SERVICE_PACKAGE,
MidiManager.BLUETOOTH_MIDI_SERVICE_CLASS));
} else {
intent = new Intent(MidiDeviceService.SERVICE_INTERFACE);
intent.setComponent(
new ComponentName(mServiceInfo.packageName, mServiceInfo.name));
}
if (!mContext.bindService(intent, mServiceConnection,
Context.BIND_AUTO_CREATE)) {
Log.e(TAG, "Unable to bind service: " + intent);
setDeviceServer(null);
mServiceConnection = null;
}
} else {
Log.e(TAG, "No way to connect to device in addDeviceConnection");
connection.notifyClient(null);
}
}
}
public void removeDeviceConnection(DeviceConnection connection) {
synchronized (mDeviceConnections) {
mDeviceConnections.remove(connection);
if (mDeviceConnections.size() == 0 && mServiceConnection != null) {
mContext.unbindService(mServiceConnection);
mServiceConnection = null;
if (mBluetoothDevice != null) {
// Bluetooth devices are ephemeral - remove when no clients exist
synchronized (mDevicesByInfo) {
closeLocked();
}
} else {
setDeviceServer(null);
}
}
}
}
// synchronize on mDevicesByInfo
public void closeLocked() {
synchronized (mDeviceConnections) {
for (DeviceConnection connection : mDeviceConnections) {
connection.getClient().removeDeviceConnection(connection);
}
mDeviceConnections.clear();
}
setDeviceServer(null);
// closed virtual devices should not be removed from mDevicesByInfo
// since they can be restarted on demand
if (mServiceInfo == null) {
removeDeviceLocked(this);
} else {
mDeviceStatus = new MidiDeviceStatus(mDeviceInfo);
}
if (mBluetoothDevice != null) {
mBluetoothDevices.remove(mBluetoothDevice);
}
}
@Override
public void binderDied() {
Log.d(TAG, "Device died: " + this);
synchronized (mDevicesByInfo) {
closeLocked();
}
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder("Device Info: ");
sb.append(mDeviceInfo);
sb.append(" Status: ");
sb.append(mDeviceStatus);
sb.append(" UID: ");
sb.append(mUid);
sb.append(" DeviceConnection count: ");
sb.append(mDeviceConnections.size());
sb.append(" mServiceConnection: ");
sb.append(mServiceConnection);
return sb.toString();
}
}
// Represents a connection between a client and a device
private final class DeviceConnection {
private final IBinder mToken = new Binder();
private final Device mDevice;
private final Client mClient;
private IMidiDeviceOpenCallback mCallback;
public DeviceConnection(Device device, Client client, IMidiDeviceOpenCallback callback) {
mDevice = device;
mClient = client;
mCallback = callback;
}
public Device getDevice() {
return mDevice;
}
public Client getClient() {
return mClient;
}
public IBinder getToken() {
return mToken;
}
public void notifyClient(IMidiDeviceServer deviceServer) {
if (mCallback != null) {
try {
mCallback.onDeviceOpened(deviceServer, (deviceServer == null ? null : mToken));
} catch (RemoteException e) {
// Client binderDied() method will do necessary cleanup, so nothing to do here
}
mCallback = null;
}
}
@Override
public String toString() {
return "DeviceConnection Device ID: " + mDevice.getDeviceInfo().getId();
}
}
public MidiService(Context context) {
mContext = context;
mPackageManager = context.getPackageManager();
mBluetoothServiceUid = -1;
}
private void onUnlockUser() {
mPackageMonitor.register(mContext, null, true);
Intent intent = new Intent(MidiDeviceService.SERVICE_INTERFACE);
List<ResolveInfo> resolveInfos = mPackageManager.queryIntentServices(intent,
PackageManager.GET_META_DATA);
if (resolveInfos != null) {
int count = resolveInfos.size();
for (int i = 0; i < count; i++) {
ServiceInfo serviceInfo = resolveInfos.get(i).serviceInfo;
if (serviceInfo != null) {
addPackageDeviceServer(serviceInfo);
}
}
}
PackageInfo info;
try {
info = mPackageManager.getPackageInfo(MidiManager.BLUETOOTH_MIDI_SERVICE_PACKAGE, 0);
} catch (PackageManager.NameNotFoundException e) {
info = null;
}
if (info != null && info.applicationInfo != null) {
mBluetoothServiceUid = info.applicationInfo.uid;
} else {
mBluetoothServiceUid = -1;
}
}
@Override
public void registerListener(IBinder token, IMidiDeviceListener listener) {
Client client = getClient(token);
if (client == null) return;
client.addListener(listener);
// Let listener know whether any ports are already busy.
updateStickyDeviceStatus(client.mUid, listener);
}
@Override
public void unregisterListener(IBinder token, IMidiDeviceListener listener) {
Client client = getClient(token);
if (client == null) return;
client.removeListener(listener);
}
// Inform listener of the status of all known devices.
private void updateStickyDeviceStatus(int uid, IMidiDeviceListener listener) {
synchronized (mDevicesByInfo) {
for (Device device : mDevicesByInfo.values()) {
// ignore private devices that our client cannot access
if (device.isUidAllowed(uid)) {
try {
MidiDeviceStatus status = device.getDeviceStatus();
if (status != null) {
listener.onDeviceStatusChanged(status);
}
} catch (RemoteException e) {
Log.e(TAG, "remote exception", e);
}
}
}
}
}
private static final MidiDeviceInfo[] EMPTY_DEVICE_INFO_ARRAY = new MidiDeviceInfo[0];
public MidiDeviceInfo[] getDevices() {
ArrayList<MidiDeviceInfo> deviceInfos = new ArrayList<MidiDeviceInfo>();
int uid = Binder.getCallingUid();
synchronized (mDevicesByInfo) {
for (Device device : mDevicesByInfo.values()) {
if (device.isUidAllowed(uid)) {
deviceInfos.add(device.getDeviceInfo());
}
}
}
return deviceInfos.toArray(EMPTY_DEVICE_INFO_ARRAY);
}
@Override
public void openDevice(IBinder token, MidiDeviceInfo deviceInfo,
IMidiDeviceOpenCallback callback) {
Client client = getClient(token);
if (client == null) return;
Device device;
synchronized (mDevicesByInfo) {
device = mDevicesByInfo.get(deviceInfo);
if (device == null) {
throw new IllegalArgumentException("device does not exist: " + deviceInfo);
}
if (!device.isUidAllowed(Binder.getCallingUid())) {
throw new SecurityException("Attempt to open private device with wrong UID");
}
}
// clear calling identity so bindService does not fail
long identity = Binder.clearCallingIdentity();
try {
client.addDeviceConnection(device, callback);
} finally {
Binder.restoreCallingIdentity(identity);
}
}
@Override
public void openBluetoothDevice(IBinder token, BluetoothDevice bluetoothDevice,
IMidiDeviceOpenCallback callback) {
Client client = getClient(token);
if (client == null) return;
// Bluetooth devices are created on demand
Device device;
synchronized (mDevicesByInfo) {
device = mBluetoothDevices.get(bluetoothDevice);
if (device == null) {
device = new Device(bluetoothDevice);
mBluetoothDevices.put(bluetoothDevice, device);
}
}
// clear calling identity so bindService does not fail
long identity = Binder.clearCallingIdentity();
try {
client.addDeviceConnection(device, callback);
} finally {
Binder.restoreCallingIdentity(identity);
}
}
@Override
public void closeDevice(IBinder clientToken, IBinder deviceToken) {
Client client = getClient(clientToken);
if (client == null) return;
client.removeDeviceConnection(deviceToken);
}
@Override
public MidiDeviceInfo registerDeviceServer(IMidiDeviceServer server, int numInputPorts,
int numOutputPorts, String[] inputPortNames, String[] outputPortNames,
Bundle properties, int type) {
int uid = Binder.getCallingUid();
if (type == MidiDeviceInfo.TYPE_USB && uid != Process.SYSTEM_UID) {
throw new SecurityException("only system can create USB devices");
} else if (type == MidiDeviceInfo.TYPE_BLUETOOTH && uid != mBluetoothServiceUid) {
throw new SecurityException("only MidiBluetoothService can create Bluetooth devices");
}
synchronized (mDevicesByInfo) {
return addDeviceLocked(type, numInputPorts, numOutputPorts, inputPortNames,
outputPortNames, properties, server, null, false, uid);
}
}
@Override
public void unregisterDeviceServer(IMidiDeviceServer server) {
synchronized (mDevicesByInfo) {
Device device = mDevicesByServer.get(server.asBinder());
if (device != null) {
device.closeLocked();
}
}
}
@Override
public MidiDeviceInfo getServiceDeviceInfo(String packageName, String className) {
synchronized (mDevicesByInfo) {
for (Device device : mDevicesByInfo.values()) {
ServiceInfo serviceInfo = device.getServiceInfo();
if (serviceInfo != null &&
packageName.equals(serviceInfo.packageName) &&
className.equals(serviceInfo.name)) {
return device.getDeviceInfo();
}
}
return null;
}
}
@Override
public MidiDeviceStatus getDeviceStatus(MidiDeviceInfo deviceInfo) {
Device device = mDevicesByInfo.get(deviceInfo);
if (device == null) {
throw new IllegalArgumentException("no such device for " + deviceInfo);
}
return device.getDeviceStatus();
}
@Override
public void setDeviceStatus(IMidiDeviceServer server, MidiDeviceStatus status) {
Device device = mDevicesByServer.get(server.asBinder());
if (device != null) {
if (Binder.getCallingUid() != device.getUid()) {
throw new SecurityException("setDeviceStatus() caller UID " + Binder.getCallingUid()
+ " does not match device's UID " + device.getUid());
}
device.setDeviceStatus(status);
notifyDeviceStatusChanged(device, status);
}
}
private void notifyDeviceStatusChanged(Device device, MidiDeviceStatus status) {
synchronized (mClients) {
for (Client c : mClients.values()) {
c.deviceStatusChanged(device, status);
}
}
}
// synchronize on mDevicesByInfo
private MidiDeviceInfo addDeviceLocked(int type, int numInputPorts, int numOutputPorts,
String[] inputPortNames, String[] outputPortNames, Bundle properties,
IMidiDeviceServer server, ServiceInfo serviceInfo,
boolean isPrivate, int uid) {
int id = mNextDeviceId++;
MidiDeviceInfo deviceInfo = new MidiDeviceInfo(type, id, numInputPorts, numOutputPorts,
inputPortNames, outputPortNames, properties, isPrivate);
if (server != null) {
try {
server.setDeviceInfo(deviceInfo);
} catch (RemoteException e) {
Log.e(TAG, "RemoteException in setDeviceInfo()");
return null;
}
}
Device device = null;
BluetoothDevice bluetoothDevice = null;
if (type == MidiDeviceInfo.TYPE_BLUETOOTH) {
bluetoothDevice = (BluetoothDevice)properties.getParcelable(
MidiDeviceInfo.PROPERTY_BLUETOOTH_DEVICE);
device = mBluetoothDevices.get(bluetoothDevice);
if (device != null) {
device.setDeviceInfo(deviceInfo);
}
}
if (device == null) {
device = new Device(server, deviceInfo, serviceInfo, uid);
}
mDevicesByInfo.put(deviceInfo, device);
if (bluetoothDevice != null) {
mBluetoothDevices.put(bluetoothDevice, device);
}
synchronized (mClients) {
for (Client c : mClients.values()) {
c.deviceAdded(device);
}
}
return deviceInfo;
}
// synchronize on mDevicesByInfo
private void removeDeviceLocked(Device device) {
IMidiDeviceServer server = device.getDeviceServer();
if (server != null) {
mDevicesByServer.remove(server.asBinder());
}
mDevicesByInfo.remove(device.getDeviceInfo());
synchronized (mClients) {
for (Client c : mClients.values()) {
c.deviceRemoved(device);
}
}
}
private void addPackageDeviceServers(String packageName) {
PackageInfo info;
try {
info = mPackageManager.getPackageInfo(packageName,
PackageManager.GET_SERVICES | PackageManager.GET_META_DATA);
} catch (PackageManager.NameNotFoundException e) {
Log.e(TAG, "handlePackageUpdate could not find package " + packageName, e);
return;
}
ServiceInfo[] services = info.services;
if (services == null) return;
for (int i = 0; i < services.length; i++) {
addPackageDeviceServer(services[i]);
}
}
private static final String[] EMPTY_STRING_ARRAY = new String[0];
private void addPackageDeviceServer(ServiceInfo serviceInfo) {
XmlResourceParser parser = null;
try {
parser = serviceInfo.loadXmlMetaData(mPackageManager,
MidiDeviceService.SERVICE_INTERFACE);
if (parser == null) return;
// ignore virtual device servers that do not require the correct permission
if (!android.Manifest.permission.BIND_MIDI_DEVICE_SERVICE.equals(
serviceInfo.permission)) {
Log.w(TAG, "Skipping MIDI device service " + serviceInfo.packageName
+ ": it does not require the permission "
+ android.Manifest.permission.BIND_MIDI_DEVICE_SERVICE);
return;
}
Bundle properties = null;
int numInputPorts = 0;
int numOutputPorts = 0;
boolean isPrivate = false;
ArrayList<String> inputPortNames = new ArrayList<String>();
ArrayList<String> outputPortNames = new ArrayList<String>();
while (true) {
int eventType = parser.next();
if (eventType == XmlPullParser.END_DOCUMENT) {
break;
} else if (eventType == XmlPullParser.START_TAG) {
String tagName = parser.getName();
if ("device".equals(tagName)) {
if (properties != null) {
Log.w(TAG, "nested <device> elements in metadata for "
+ serviceInfo.packageName);
continue;
}
properties = new Bundle();
properties.putParcelable(MidiDeviceInfo.PROPERTY_SERVICE_INFO, serviceInfo);
numInputPorts = 0;
numOutputPorts = 0;
isPrivate = false;
int count = parser.getAttributeCount();
for (int i = 0; i < count; i++) {
String name = parser.getAttributeName(i);
String value = parser.getAttributeValue(i);
if ("private".equals(name)) {
isPrivate = "true".equals(value);
} else {
properties.putString(name, value);
}
}
} else if ("input-port".equals(tagName)) {
if (properties == null) {
Log.w(TAG, "<input-port> outside of <device> in metadata for "
+ serviceInfo.packageName);
continue;
}
numInputPorts++;
String portName = null;
int count = parser.getAttributeCount();
for (int i = 0; i < count; i++) {
String name = parser.getAttributeName(i);
String value = parser.getAttributeValue(i);
if ("name".equals(name)) {
portName = value;
break;
}
}
inputPortNames.add(portName);
} else if ("output-port".equals(tagName)) {
if (properties == null) {
Log.w(TAG, "<output-port> outside of <device> in metadata for "
+ serviceInfo.packageName);
continue;
}
numOutputPorts++;
String portName = null;
int count = parser.getAttributeCount();
for (int i = 0; i < count; i++) {
String name = parser.getAttributeName(i);
String value = parser.getAttributeValue(i);
if ("name".equals(name)) {
portName = value;
break;
}
}
outputPortNames.add(portName);
}
} else if (eventType == XmlPullParser.END_TAG) {
String tagName = parser.getName();
if ("device".equals(tagName)) {
if (properties != null) {
if (numInputPorts == 0 && numOutputPorts == 0) {
Log.w(TAG, "<device> with no ports in metadata for "
+ serviceInfo.packageName);
continue;
}
int uid;
try {
ApplicationInfo appInfo = mPackageManager.getApplicationInfo(
serviceInfo.packageName, 0);
uid = appInfo.uid;
} catch (PackageManager.NameNotFoundException e) {
Log.e(TAG, "could not fetch ApplicationInfo for "
+ serviceInfo.packageName);
continue;
}
synchronized (mDevicesByInfo) {
addDeviceLocked(MidiDeviceInfo.TYPE_VIRTUAL,
numInputPorts, numOutputPorts,
inputPortNames.toArray(EMPTY_STRING_ARRAY),
outputPortNames.toArray(EMPTY_STRING_ARRAY),
properties, null, serviceInfo, isPrivate, uid);
}
// setting properties to null signals that we are no longer
// processing a <device>
properties = null;
inputPortNames.clear();
outputPortNames.clear();
}
}
}
}
} catch (Exception e) {
Log.w(TAG, "Unable to load component info " + serviceInfo.toString(), e);
} finally {
if (parser != null) parser.close();
}
}
private void removePackageDeviceServers(String packageName) {
synchronized (mDevicesByInfo) {
Iterator<Device> iterator = mDevicesByInfo.values().iterator();
while (iterator.hasNext()) {
Device device = iterator.next();
if (packageName.equals(device.getPackageName())) {
iterator.remove();
removeDeviceLocked(device);
}
}
}
}
@Override
public void dump(FileDescriptor fd, PrintWriter writer, String[] args) {
mContext.enforceCallingOrSelfPermission(android.Manifest.permission.DUMP, TAG);
final IndentingPrintWriter pw = new IndentingPrintWriter(writer, " ");
pw.println("MIDI Manager State:");
pw.increaseIndent();
pw.println("Devices:");
pw.increaseIndent();
synchronized (mDevicesByInfo) {
for (Device device : mDevicesByInfo.values()) {
pw.println(device.toString());
}
}
pw.decreaseIndent();
pw.println("Clients:");
pw.increaseIndent();
synchronized (mClients) {
for (Client client : mClients.values()) {
pw.println(client.toString());
}
}
pw.decreaseIndent();
}
}