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/*
* Copyright (C) 2010 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.Context;
import android.content.pm.PackageManager;
import android.net.nsd.DnsSdServiceInfo;
import android.net.nsd.DnsSdTxtRecord;
import android.net.nsd.INsdManager;
import android.net.nsd.NsdManager;
import android.os.Binder;
import android.os.Handler;
import android.os.HandlerThread;
import android.os.Message;
import android.os.Messenger;
import android.os.IBinder;
import android.util.Slog;
import java.io.FileDescriptor;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.concurrent.CountDownLatch;
import java.util.List;
import com.android.internal.app.IBatteryStats;
import com.android.internal.telephony.TelephonyIntents;
import com.android.internal.util.AsyncChannel;
import com.android.server.am.BatteryStatsService;
import com.android.server.NativeDaemonConnector.Command;
import com.android.internal.R;
/**
* Network Service Discovery Service handles remote service discovery operation requests by
* implementing the INsdManager interface.
*
* @hide
*/
public class NsdService extends INsdManager.Stub {
private static final String TAG = "NsdService";
private static final String MDNS_TAG = "mDnsConnector";
private static final boolean DBG = true;
private Context mContext;
/**
* Clients receiving asynchronous messages
*/
private List<AsyncChannel> mClients = new ArrayList<AsyncChannel>();
private AsyncChannel mReplyChannel = new AsyncChannel();
/**
* Handles client(app) connections
*/
private class AsyncServiceHandler extends Handler {
AsyncServiceHandler(android.os.Looper looper) {
super(looper);
}
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case AsyncChannel.CMD_CHANNEL_HALF_CONNECTED:
if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) {
AsyncChannel c = (AsyncChannel) msg.obj;
if (DBG) Slog.d(TAG, "New client listening to asynchronous messages");
c.sendMessage(AsyncChannel.CMD_CHANNEL_FULLY_CONNECTED);
mClients.add(c);
} else {
Slog.e(TAG, "Client connection failure, error=" + msg.arg1);
}
break;
case AsyncChannel.CMD_CHANNEL_DISCONNECTED:
if (msg.arg1 == AsyncChannel.STATUS_SEND_UNSUCCESSFUL) {
Slog.e(TAG, "Send failed, client connection lost");
} else {
if (DBG) Slog.d(TAG, "Client connection lost with reason: " + msg.arg1);
}
mClients.remove((AsyncChannel) msg.obj);
break;
case AsyncChannel.CMD_CHANNEL_FULL_CONNECTION:
AsyncChannel ac = new AsyncChannel();
ac.connect(mContext, this, msg.replyTo);
break;
case NsdManager.DISCOVER_SERVICES:
if (DBG) Slog.d(TAG, "Discover services");
DnsSdServiceInfo s = (DnsSdServiceInfo) msg.obj;
discoverServices(1, s.getServiceType());
mReplyChannel.replyToMessage(msg, NsdManager.DISCOVER_SERVICES_STARTED);
break;
case NsdManager.STOP_DISCOVERY:
if (DBG) Slog.d(TAG, "Stop service discovery");
mReplyChannel.replyToMessage(msg, NsdManager.STOP_DISCOVERY_FAILED);
break;
case NsdManager.REGISTER_SERVICE:
if (DBG) Slog.d(TAG, "Register service");
mReplyChannel.replyToMessage(msg, NsdManager.REGISTER_SERVICE_FAILED);
break;
case NsdManager.UPDATE_SERVICE:
if (DBG) Slog.d(TAG, "Update service");
mReplyChannel.replyToMessage(msg, NsdManager.UPDATE_SERVICE_FAILED);
break;
default:
Slog.d(TAG, "NsdServicehandler.handleMessage ignoring msg=" + msg);
break;
}
}
}
private AsyncServiceHandler mAsyncServiceHandler;
private NativeDaemonConnector mNativeConnector;
private final CountDownLatch mNativeDaemonConnected = new CountDownLatch(1);
private NsdService(Context context) {
mContext = context;
HandlerThread nsdThread = new HandlerThread("NsdService");
nsdThread.start();
mAsyncServiceHandler = new AsyncServiceHandler(nsdThread.getLooper());
/*
mNativeConnector = new NativeDaemonConnector(new NativeCallbackReceiver(), "mdns", 10,
MDNS_TAG, 25);
Thread th = new Thread(mNativeConnector, MDNS_TAG);
th.start();
*/
}
public static NsdService create(Context context) throws InterruptedException {
NsdService service = new NsdService(context);
/* service.mNativeDaemonConnected.await(); */
return service;
}
public Messenger getMessenger() {
return new Messenger(mAsyncServiceHandler);
}
/* These should be in sync with system/netd/mDnsResponseCode.h */
class NativeResponseCode {
public static final int SERVICE_FOUND = 101;
public static final int SERVICE_LOST = 102;
public static final int SERVICE_DISCOVERY_FAILED = 103;
public static final int SERVICE_REGISTERED = 104;
public static final int SERVICE_REGISTRATION_FAILED = 105;
public static final int SERVICE_UPDATED = 106;
public static final int SERVICE_UPDATE_FAILED = 107;
public static final int SERVICE_RESOLVED = 108;
public static final int SERVICE_RESOLUTION_FAILED = 109;
}
class NativeCallbackReceiver implements INativeDaemonConnectorCallbacks {
public void onDaemonConnected() {
mNativeDaemonConnected.countDown();
}
public boolean onEvent(int code, String raw, String[] cooked) {
switch (code) {
case NativeResponseCode.SERVICE_FOUND:
/* NNN uniqueId serviceName regType */
break;
case NativeResponseCode.SERVICE_LOST:
/* NNN uniqueId serviceName regType */
break;
case NativeResponseCode.SERVICE_DISCOVERY_FAILED:
/* NNN uniqueId errorCode */
break;
case NativeResponseCode.SERVICE_REGISTERED:
/* NNN regId serviceName regType */
break;
case NativeResponseCode.SERVICE_REGISTRATION_FAILED:
/* NNN regId errorCode */
break;
case NativeResponseCode.SERVICE_UPDATED:
/* NNN regId */
break;
case NativeResponseCode.SERVICE_UPDATE_FAILED:
/* NNN regId errorCode */
break;
case NativeResponseCode.SERVICE_RESOLVED:
/* NNN resolveId fullName hostName port txtlen txtdata */
break;
case NativeResponseCode.SERVICE_RESOLUTION_FAILED:
/* NNN resovleId errorCode */
break;
default:
break;
}
return false;
}
}
private void registerService(int regId, DnsSdServiceInfo service) {
try {
//Add txtlen and txtdata
mNativeConnector.execute("mdnssd", "register", regId, service.getServiceName(),
service.getServiceType(), service.getPort());
} catch(NativeDaemonConnectorException e) {
Slog.e(TAG, "Failed to execute registerService");
}
}
private void updateService(int regId, DnsSdTxtRecord t) {
try {
if (t == null) return;
mNativeConnector.execute("mdnssd", "update", regId, t.size(), t.getRawData());
} catch(NativeDaemonConnectorException e) {
Slog.e(TAG, "Failed to updateServices");
}
}
private void discoverServices(int discoveryId, String serviceType) {
try {
mNativeConnector.execute("mdnssd", "discover", discoveryId, serviceType);
} catch(NativeDaemonConnectorException e) {
Slog.e(TAG, "Failed to discoverServices");
}
}
private void stopServiceDiscovery(int discoveryId) {
try {
mNativeConnector.execute("mdnssd", "stopdiscover", discoveryId);
} catch(NativeDaemonConnectorException e) {
Slog.e(TAG, "Failed to stopServiceDiscovery");
}
}
private void resolveService(DnsSdServiceInfo service) {
try {
mNativeConnector.execute("mdnssd", "resolve", service.getServiceName(),
service.getServiceType());
} catch(NativeDaemonConnectorException e) {
Slog.e(TAG, "Failed to resolveService");
}
}
@Override
protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP)
!= PackageManager.PERMISSION_GRANTED) {
pw.println("Permission Denial: can't dump ServiceDiscoverService from from pid="
+ Binder.getCallingPid()
+ ", uid=" + Binder.getCallingUid());
return;
}
pw.println("Internal state:");
}
}
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