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/*
* Copyright (C) 2012 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.example.android.nsdchat;
import android.content.Context;
import android.net.nsd.NsdServiceInfo;
import android.net.nsd.NsdManager;
import android.util.Log;
public class NsdHelper {
Context mContext;
NsdManager mNsdManager;
NsdManager.ResolveListener mResolveListener;
NsdManager.DiscoveryListener mDiscoveryListener;
NsdManager.RegistrationListener mRegistrationListener;
public static final String SERVICE_TYPE = "_http._tcp.";
public static final String TAG = "NsdHelper";
public String mServiceName = "NsdChat";
NsdServiceInfo mService;
public NsdHelper(Context context) {
mContext = context;
mNsdManager = (NsdManager) context.getSystemService(Context.NSD_SERVICE);
}
public void initializeNsd() {
initializeResolveListener();
//mNsdManager.init(mContext.getMainLooper(), this);
}
public void initializeDiscoveryListener() {
mDiscoveryListener = new NsdManager.DiscoveryListener() {
@Override
public void onDiscoveryStarted(String regType) {
Log.d(TAG, "Service discovery started");
}
@Override
public void onServiceFound(NsdServiceInfo service) {
Log.d(TAG, "Service discovery success" + service);
if (!service.getServiceType().equals(SERVICE_TYPE)) {
Log.d(TAG, "Unknown Service Type: " + service.getServiceType());
} else if (service.getServiceName().equals(mServiceName)) {
Log.d(TAG, "Same machine: " + mServiceName);
} else if (service.getServiceName().contains(mServiceName)){
mNsdManager.resolveService(service, mResolveListener);
}
}
@Override
public void onServiceLost(NsdServiceInfo service) {
Log.e(TAG, "service lost" + service);
if (mService == service) {
mService = null;
}
}
@Override
public void onDiscoveryStopped(String serviceType) {
Log.i(TAG, "Discovery stopped: " + serviceType);
}
@Override
public void onStartDiscoveryFailed(String serviceType, int errorCode) {
Log.e(TAG, "Discovery failed: Error code:" + errorCode);
}
@Override
public void onStopDiscoveryFailed(String serviceType, int errorCode) {
Log.e(TAG, "Discovery failed: Error code:" + errorCode);
}
};
}
public void initializeResolveListener() {
mResolveListener = new NsdManager.ResolveListener() {
@Override
public void onResolveFailed(NsdServiceInfo serviceInfo, int errorCode) {
Log.e(TAG, "Resolve failed" + errorCode);
}
@Override
public void onServiceResolved(NsdServiceInfo serviceInfo) {
Log.e(TAG, "Resolve Succeeded. " + serviceInfo);
if (serviceInfo.getServiceName().equals(mServiceName)) {
Log.d(TAG, "Same IP.");
return;
}
mService = serviceInfo;
}
};
}
public void initializeRegistrationListener() {
mRegistrationListener = new NsdManager.RegistrationListener() {
@Override
public void onServiceRegistered(NsdServiceInfo NsdServiceInfo) {
mServiceName = NsdServiceInfo.getServiceName();
Log.d(TAG, "Service registered: " + mServiceName);
}
@Override
public void onRegistrationFailed(NsdServiceInfo arg0, int arg1) {
Log.d(TAG, "Service registration failed: " + arg1);
}
@Override
public void onServiceUnregistered(NsdServiceInfo arg0) {
Log.d(TAG, "Service unregistered: " + arg0.getServiceName());
}
@Override
public void onUnregistrationFailed(NsdServiceInfo serviceInfo, int errorCode) {
Log.d(TAG, "Service unregistration failed: " + errorCode);
}
};
}
public void registerService(int port) {
tearDown(); // Cancel any previous registration request
initializeRegistrationListener();
NsdServiceInfo serviceInfo = new NsdServiceInfo();
serviceInfo.setPort(port);
serviceInfo.setServiceName(mServiceName);
serviceInfo.setServiceType(SERVICE_TYPE);
mNsdManager.registerService(
serviceInfo, NsdManager.PROTOCOL_DNS_SD, mRegistrationListener);
}
public void discoverServices() {
stopDiscovery(); // Cancel any existing discovery request
initializeDiscoveryListener();
mNsdManager.discoverServices(
SERVICE_TYPE, NsdManager.PROTOCOL_DNS_SD, mDiscoveryListener);
}
public void stopDiscovery() {
if (mDiscoveryListener != null) {
try {
mNsdManager.stopServiceDiscovery(mDiscoveryListener);
} finally {
}
mDiscoveryListener = null;
}
}
public NsdServiceInfo getChosenServiceInfo() {
return mService;
}
public void tearDown() {
if (mRegistrationListener != null) {
try {
mNsdManager.unregisterService(mRegistrationListener);
} finally {
}
mRegistrationListener = null;
}
}
}
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