/*
* Copyright 2015 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
package org.webrtc;
import android.annotation.SuppressLint;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.net.ConnectivityManager;
import android.net.ConnectivityManager.NetworkCallback;
import android.net.LinkAddress;
import android.net.LinkProperties;
import android.net.Network;
import android.net.NetworkCapabilities;
import android.net.NetworkInfo;
import android.net.NetworkRequest;
import android.net.wifi.WifiInfo;
import android.net.wifi.WifiManager;
import android.net.wifi.p2p.WifiP2pGroup;
import android.net.wifi.p2p.WifiP2pManager;
import android.os.Build;
import android.telephony.TelephonyManager;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
/**
* Borrowed from Chromium's
* src/net/android/java/src/org/chromium/net/NetworkChangeNotifierAutoDetect.java
*
* Used by the NetworkMonitor to listen to platform changes in connectivity.
* Note that use of this class requires that the app have the platform
* ACCESS_NETWORK_STATE permission.
*/
public class NetworkMonitorAutoDetect extends BroadcastReceiver {
public static enum ConnectionType {
CONNECTION_UNKNOWN,
CONNECTION_ETHERNET,
CONNECTION_WIFI,
CONNECTION_4G,
CONNECTION_3G,
CONNECTION_2G,
CONNECTION_UNKNOWN_CELLULAR,
CONNECTION_BLUETOOTH,
CONNECTION_VPN,
CONNECTION_NONE
}
public static class IPAddress {
public final byte[] address;
public IPAddress(byte[] address) {
this.address = address;
}
@CalledByNative("IPAddress")
private byte[] getAddress() {
return address;
}
}
/** Java version of NetworkMonitor.NetworkInformation */
public static class NetworkInformation {
public final String name;
public final ConnectionType type;
// Used to specify the underlying network type if the type is CONNECTION_VPN.
public final ConnectionType underlyingTypeForVpn;
public final long handle;
public final IPAddress[] ipAddresses;
public NetworkInformation(String name, ConnectionType type, ConnectionType underlyingTypeForVpn,
long handle, IPAddress[] addresses) {
this.name = name;
this.type = type;
this.underlyingTypeForVpn = underlyingTypeForVpn;
this.handle = handle;
this.ipAddresses = addresses;
}
@CalledByNative("NetworkInformation")
private IPAddress[] getIpAddresses() {
return ipAddresses;
}
@CalledByNative("NetworkInformation")
private ConnectionType getConnectionType() {
return type;
}
@CalledByNative("NetworkInformation")
private ConnectionType getUnderlyingConnectionTypeForVpn() {
return underlyingTypeForVpn;
}
@CalledByNative("NetworkInformation")
private long getHandle() {
return handle;
}
@CalledByNative("NetworkInformation")
private String getName() {
return name;
}
};
static class NetworkState {
private final boolean connected;
// Defined from ConnectivityManager.TYPE_XXX for non-mobile; for mobile, it is
// further divided into 2G, 3G, or 4G from the subtype.
private final int type;
// Defined from NetworkInfo.subtype, which is one of the TelephonyManager.NETWORK_TYPE_XXXs.
// Will be useful to find the maximum bandwidth.
private final int subtype;
// When the type is TYPE_VPN, the following two fields specify the similar type and subtype as
// above for the underlying network that is used by the VPN.
private final int underlyingNetworkTypeForVpn;
private final int underlyingNetworkSubtypeForVpn;
public NetworkState(boolean connected, int type, int subtype, int underlyingNetworkTypeForVpn,
int underlyingNetworkSubtypeForVpn) {
this.connected = connected;
this.type = type;
this.subtype = subtype;
this.underlyingNetworkTypeForVpn = underlyingNetworkTypeForVpn;
this.underlyingNetworkSubtypeForVpn = underlyingNetworkSubtypeForVpn;
}
public boolean isConnected() {
return connected;
}
public int getNetworkType() {
return type;
}
public int getNetworkSubType() {
return subtype;
}
public int getUnderlyingNetworkTypeForVpn() {
return underlyingNetworkTypeForVpn;
}
public int getUnderlyingNetworkSubtypeForVpn() {
return underlyingNetworkSubtypeForVpn;
}
}
/**
* The methods in this class get called when the network changes if the callback
* is registered with a proper network request. It is only available in Android Lollipop
* and above.
*/
@SuppressLint("NewApi")
private class SimpleNetworkCallback extends NetworkCallback {
@Override
public void onAvailable(Network network) {
Logging.d(TAG, "Network becomes available: " + network.toString());
onNetworkChanged(network);
}
@Override
public void onCapabilitiesChanged(Network network, NetworkCapabilities networkCapabilities) {
// A capabilities change may indicate the ConnectionType has changed,
// so forward the new NetworkInformation along to the observer.
Logging.d(TAG, "capabilities changed: " + networkCapabilities.toString());
onNetworkChanged(network);
}
@Override
public void onLinkPropertiesChanged(Network network, LinkProperties linkProperties) {
// A link property change may indicate the IP address changes.
// so forward the new NetworkInformation to the observer.
Logging.d(TAG, "link properties changed: " + linkProperties.toString());
onNetworkChanged(network);
}
@Override
public void onLosing(Network network, int maxMsToLive) {
// Tell the network is going to lose in MaxMsToLive milliseconds.
// We may use this signal later.
Logging.d(
TAG, "Network " + network.toString() + " is about to lose in " + maxMsToLive + "ms");
}
@Override
public void onLost(Network network) {
Logging.d(TAG, "Network " + network.toString() + " is disconnected");
observer.onNetworkDisconnect(networkToNetId(network));
}
private void onNetworkChanged(Network network) {
NetworkInformation networkInformation = connectivityManagerDelegate.networkToInfo(network);
if (networkInformation != null) {
observer.onNetworkConnect(networkInformation);
}
}
}
/** Queries the ConnectivityManager for information about the current connection. */
static class ConnectivityManagerDelegate {
/**
* Note: In some rare Android systems connectivityManager is null. We handle that
* gracefully below.
*/
private final ConnectivityManager connectivityManager;
ConnectivityManagerDelegate(Context context) {
connectivityManager =
(ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
}
// For testing.
ConnectivityManagerDelegate() {
// All the methods below should be overridden.
connectivityManager = null;
}
/**
* Returns connection type and status information about the current
* default network.
*/
NetworkState getNetworkState() {
if (connectivityManager == null) {
return new NetworkState(false, -1, -1, -1, -1);
}
return getNetworkState(connectivityManager.getActiveNetworkInfo());
}
/**
* Returns connection type and status information about |network|.
* Only callable on Lollipop and newer releases.
*/
@SuppressLint("NewApi")
NetworkState getNetworkState( Network network) {
if (network == null || connectivityManager == null) {
return new NetworkState(false, -1, -1, -1, -1);
}
NetworkInfo networkInfo = connectivityManager.getNetworkInfo(network);
if (networkInfo == null) {
Logging.w(TAG, "Couldn't retrieve information from network " + network.toString());
return new NetworkState(false, -1, -1, -1, -1);
}
// The general logic of handling a VPN in this method is as follows. getNetworkInfo will
// return the info of the network with the same id as in |network| when it is registered via
// ConnectivityManager.registerNetworkAgent in Android. |networkInfo| may or may not indicate
// the type TYPE_VPN if |network| is a VPN. To reliably detect the VPN interface, we need to
// query the network capability as below in the case when networkInfo.getType() is not
// TYPE_VPN. On the other hand when networkInfo.getType() is TYPE_VPN, the only solution so
// far to obtain the underlying network information is to query the active network interface.
// However, the active network interface may not be used for the VPN, for example, if the VPN
// is restricted to WiFi by the implementation but the WiFi interface is currently turned
// off and the active interface is the Cell. Using directly the result from
// getActiveNetworkInfo may thus give the wrong interface information, and one should note
// that getActiveNetworkInfo would return the default network interface if the VPN does not
// specify its underlying networks in the implementation. Therefore, we need further compare
// |network| to the active network. If they are not the same network, we will have to fall
// back to report an unknown network.
if (networkInfo.getType() != ConnectivityManager.TYPE_VPN) {
// Note that getNetworkCapabilities returns null if the network is unknown.
NetworkCapabilities networkCapabilities =
connectivityManager.getNetworkCapabilities(network);
if (networkCapabilities == null
|| !networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_VPN)) {
return getNetworkState(networkInfo);
}
// When |network| is in fact a VPN after querying its capability but |networkInfo| is not of
// type TYPE_VPN, |networkInfo| contains the info for the underlying network, and we return
// a NetworkState constructed from it.
return new NetworkState(networkInfo.isConnected(), ConnectivityManager.TYPE_VPN, -1,
networkInfo.getType(), networkInfo.getSubtype());
}
// When |networkInfo| is of type TYPE_VPN, which implies |network| is a VPN, we return the
// NetworkState of the active network via getActiveNetworkInfo(), if |network| is the active
// network that supports the VPN. Otherwise, NetworkState of an unknown network with type -1
// will be returned.
//
// Note that getActiveNetwork and getActiveNetworkInfo return null if no default network is
// currently active.
if (networkInfo.getType() == ConnectivityManager.TYPE_VPN) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M
&& network.equals(connectivityManager.getActiveNetwork())) {
// If a VPN network is in place, we can find the underlying network type via querying the
// active network info thanks to
// https://android.googlesource.com/platform/frameworks/base/+/d6a7980d
NetworkInfo underlyingActiveNetworkInfo = connectivityManager.getActiveNetworkInfo();
// We use the NetworkInfo of the underlying network if it is not of TYPE_VPN itself.
if (underlyingActiveNetworkInfo != null
&& underlyingActiveNetworkInfo.getType() != ConnectivityManager.TYPE_VPN) {
return new NetworkState(networkInfo.isConnected(), ConnectivityManager.TYPE_VPN, -1,
underlyingActiveNetworkInfo.getType(), underlyingActiveNetworkInfo.getSubtype());
}
}
return new NetworkState(
networkInfo.isConnected(), ConnectivityManager.TYPE_VPN, -1, -1, -1);
}
return getNetworkState(networkInfo);
}
/**
* Returns connection type and status information gleaned from networkInfo. Note that to obtain
* the complete information about a VPN including the type of the underlying network, one should
* use the above method getNetworkState with a Network object.
*/
private NetworkState getNetworkState( NetworkInfo networkInfo) {
if (networkInfo == null || !networkInfo.isConnected()) {
return new NetworkState(false, -1, -1, -1, -1);
}
return new NetworkState(true, networkInfo.getType(), networkInfo.getSubtype(), -1, -1);
}
/**
* Returns all connected networks.
* Only callable on Lollipop and newer releases.
*/
@SuppressLint("NewApi")
Network[] getAllNetworks() {
if (connectivityManager == null) {
return new Network[0];
}
return connectivityManager.getAllNetworks();
}
List<NetworkInformation> getActiveNetworkList() {
if (!supportNetworkCallback()) {
return null;
}
ArrayList<NetworkInformation> netInfoList = new ArrayList<NetworkInformation>();
for (Network network : getAllNetworks()) {
NetworkInformation info = networkToInfo(network);
if (info != null) {
netInfoList.add(info);
}
}
return netInfoList;
}
/**
* Returns the NetID of the current default network. Returns
* INVALID_NET_ID if no current default network connected.
* Only callable on Lollipop and newer releases.
*/
@SuppressLint("NewApi")
long getDefaultNetId() {
if (!supportNetworkCallback()) {
return INVALID_NET_ID;
}
// Android Lollipop had no API to get the default network; only an
// API to return the NetworkInfo for the default network. To
// determine the default network one can find the network with
// type matching that of the default network.
final NetworkInfo defaultNetworkInfo = connectivityManager.getActiveNetworkInfo();
if (defaultNetworkInfo == null) {
return INVALID_NET_ID;
}
final Network[] networks = getAllNetworks();
long defaultNetId = INVALID_NET_ID;
for (Network network : networks) {
if (!hasInternetCapability(network)) {
continue;
}
final NetworkInfo networkInfo = connectivityManager.getNetworkInfo(network);
if (networkInfo != null && networkInfo.getType() == defaultNetworkInfo.getType()) {
// There should not be multiple connected networks of the
// same type. At least as of Android Marshmallow this is
// not supported. If this becomes supported this assertion
// may trigger. At that point we could consider using
// ConnectivityManager.getDefaultNetwork() though this
// may give confusing results with VPNs and is only
// available with Android Marshmallow.
if (defaultNetId != INVALID_NET_ID) {
throw new RuntimeException(
"Multiple connected networks of same type are not supported.");
}
defaultNetId = networkToNetId(network);
}
}
return defaultNetId;
}
@SuppressLint("NewApi")
private NetworkInformation networkToInfo( Network network) {
if (network == null || connectivityManager == null) {
return null;
}
LinkProperties linkProperties = connectivityManager.getLinkProperties(network);
// getLinkProperties will return null if the network is unknown.
if (linkProperties == null) {
Logging.w(TAG, "Detected unknown network: " + network.toString());
return null;
}
if (linkProperties.getInterfaceName() == null) {
Logging.w(TAG, "Null interface name for network " + network.toString());
return null;
}
NetworkState networkState = getNetworkState(network);
ConnectionType connectionType = getConnectionType(networkState);
if (connectionType == ConnectionType.CONNECTION_NONE) {
// This may not be an error. The OS may signal a network event with connection type
// NONE when the network disconnects.
Logging.d(TAG, "Network " + network.toString() + " is disconnected");
return null;
}
// Some android device may return a CONNECTION_UNKNOWN_CELLULAR or CONNECTION_UNKNOWN type,
// which appears to be usable. Just log them here.
if (connectionType == ConnectionType.CONNECTION_UNKNOWN
|| connectionType == ConnectionType.CONNECTION_UNKNOWN_CELLULAR) {
Logging.d(TAG, "Network " + network.toString() + " connection type is " + connectionType
+ " because it has type " + networkState.getNetworkType() + " and subtype "
+ networkState.getNetworkSubType());
}
// ConnectionType.CONNECTION_UNKNOWN if the network is not a VPN or the underlying network is
// unknown.
ConnectionType underlyingConnectionTypeForVpn =
getUnderlyingConnectionTypeForVpn(networkState);
NetworkInformation networkInformation = new NetworkInformation(
linkProperties.getInterfaceName(), connectionType, underlyingConnectionTypeForVpn,
networkToNetId(network), getIPAddresses(linkProperties));
return networkInformation;
}
/**
* Returns true if {@code network} can provide Internet access. Can be used to
* ignore specialized networks (e.g. IMS, FOTA).
*/
@SuppressLint("NewApi")
boolean hasInternetCapability(Network network) {
if (connectivityManager == null) {
return false;
}
final NetworkCapabilities capabilities = connectivityManager.getNetworkCapabilities(network);
return capabilities != null
&& capabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET);
}
/** Only callable on Lollipop and newer releases. */
@SuppressLint("NewApi")
public void registerNetworkCallback(NetworkCallback networkCallback) {
connectivityManager.registerNetworkCallback(
new NetworkRequest.Builder()
.addCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET)
.build(),
networkCallback);
}
/** Only callable on Lollipop and newer releases. */
@SuppressLint("NewApi")
public void requestMobileNetwork(NetworkCallback networkCallback) {
NetworkRequest.Builder builder = new NetworkRequest.Builder();
builder.addCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET)
.addTransportType(NetworkCapabilities.TRANSPORT_CELLULAR);
connectivityManager.requestNetwork(builder.build(), networkCallback);
}
@SuppressLint("NewApi")
IPAddress[] getIPAddresses(LinkProperties linkProperties) {
IPAddress[] ipAddresses = new IPAddress[linkProperties.getLinkAddresses().size()];
int i = 0;
for (LinkAddress linkAddress : linkProperties.getLinkAddresses()) {
ipAddresses[i] = new IPAddress(linkAddress.getAddress().getAddress());
++i;
}
return ipAddresses;
}
@SuppressLint("NewApi")
public void releaseCallback(NetworkCallback networkCallback) {
if (supportNetworkCallback()) {
Logging.d(TAG, "Unregister network callback");
connectivityManager.unregisterNetworkCallback(networkCallback);
}
}
public boolean supportNetworkCallback() {
return Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP && connectivityManager != null;
}
}
/** Queries the WifiManager for SSID of the current Wifi connection. */
static class WifiManagerDelegate {
private final Context context;
WifiManagerDelegate(Context context) {
this.context = context;
}
// For testing.
WifiManagerDelegate() {
// All the methods below should be overridden.
context = null;
}
String getWifiSSID() {
final Intent intent = context.registerReceiver(
null, new IntentFilter(WifiManager.NETWORK_STATE_CHANGED_ACTION));
if (intent != null) {
final WifiInfo wifiInfo = intent.getParcelableExtra(WifiManager.EXTRA_WIFI_INFO);
if (wifiInfo != null) {
final String ssid = wifiInfo.getSSID();
if (ssid != null) {
return ssid;
}
}
}
return "";
}
}
/** Maintains the information about wifi direct (aka WifiP2p) networks. */
static class WifiDirectManagerDelegate extends BroadcastReceiver {
// Network "handle" for the Wifi P2p network. We have to bind to the default network id
// (NETWORK_UNSPECIFIED) for these addresses.
private static final int WIFI_P2P_NETWORK_HANDLE = 0;
private final Context context;
private final Observer observer;
// Network information about a WifiP2p (aka WiFi-Direct) network, or null if no such network is
// connected.
private NetworkInformation wifiP2pNetworkInfo;
WifiDirectManagerDelegate(Observer observer, Context context) {
this.context = context;
this.observer = observer;
IntentFilter intentFilter = new IntentFilter();
intentFilter.addAction(WifiP2pManager.WIFI_P2P_STATE_CHANGED_ACTION);
intentFilter.addAction(WifiP2pManager.WIFI_P2P_CONNECTION_CHANGED_ACTION);
context.registerReceiver(this, intentFilter);
}
// BroadcastReceiver
@Override
@SuppressLint("InlinedApi")
public void onReceive(Context context, Intent intent) {
if (WifiP2pManager.WIFI_P2P_CONNECTION_CHANGED_ACTION.equals(intent.getAction())) {
WifiP2pGroup wifiP2pGroup = intent.getParcelableExtra(WifiP2pManager.EXTRA_WIFI_P2P_GROUP);
onWifiP2pGroupChange(wifiP2pGroup);
} else if (WifiP2pManager.WIFI_P2P_STATE_CHANGED_ACTION.equals(intent.getAction())) {
int state = intent.getIntExtra(WifiP2pManager.EXTRA_WIFI_STATE, 0 /* default to unknown */);
onWifiP2pStateChange(state);
}
}
/** Releases the broadcast receiver. */
public void release() {
context.unregisterReceiver(this);
}
public List<NetworkInformation> getActiveNetworkList() {
if (wifiP2pNetworkInfo != null) {
return Collections.singletonList(wifiP2pNetworkInfo);
}
return Collections.emptyList();
}
/** Handle a change notification about the wifi p2p group. */
private void onWifiP2pGroupChange( WifiP2pGroup wifiP2pGroup) {
if (wifiP2pGroup == null || wifiP2pGroup.getInterface() == null) {
return;
}
NetworkInterface wifiP2pInterface;
try {
wifiP2pInterface = NetworkInterface.getByName(wifiP2pGroup.getInterface());
} catch (SocketException e) {
Logging.e(TAG, "Unable to get WifiP2p network interface", e);
return;
}
List<InetAddress> interfaceAddresses = Collections.list(wifiP2pInterface.getInetAddresses());
IPAddress[] ipAddresses = new IPAddress[interfaceAddresses.size()];
for (int i = 0; i < interfaceAddresses.size(); ++i) {
ipAddresses[i] = new IPAddress(interfaceAddresses.get(i).getAddress());
}
wifiP2pNetworkInfo =
new NetworkInformation(wifiP2pGroup.getInterface(), ConnectionType.CONNECTION_WIFI,
ConnectionType.CONNECTION_NONE, WIFI_P2P_NETWORK_HANDLE, ipAddresses);
observer.onNetworkConnect(wifiP2pNetworkInfo);
}
/** Handle a state change notification about wifi p2p. */
private void onWifiP2pStateChange(int state) {
if (state == WifiP2pManager.WIFI_P2P_STATE_DISABLED) {
wifiP2pNetworkInfo = null;
observer.onNetworkDisconnect(WIFI_P2P_NETWORK_HANDLE);
}
}
}
static final long INVALID_NET_ID = -1;
private static final String TAG = "NetworkMonitorAutoDetect";
// Observer for the connection type change.
private final Observer observer;
private final IntentFilter intentFilter;
private final Context context;
// Used to request mobile network. It does not do anything except for keeping
// the callback for releasing the request.
private final NetworkCallback mobileNetworkCallback;
// Used to receive updates on all networks.
private final NetworkCallback allNetworkCallback;
// connectivityManagerDelegate and wifiManagerDelegate are only non-final for testing.
private ConnectivityManagerDelegate connectivityManagerDelegate;
private WifiManagerDelegate wifiManagerDelegate;
private WifiDirectManagerDelegate wifiDirectManagerDelegate;
private boolean isRegistered;
private ConnectionType connectionType;
private String wifiSSID;
/**
* Observer interface by which observer is notified of network changes.
*/
public static interface Observer {
/**
* Called when default network changes.
*/
public void onConnectionTypeChanged(ConnectionType newConnectionType);
public void onNetworkConnect(NetworkInformation networkInfo);
public void onNetworkDisconnect(long networkHandle);
}
/**
* Constructs a NetworkMonitorAutoDetect. Should only be called on UI thread.
*/
@SuppressLint("NewApi")
public NetworkMonitorAutoDetect(Observer observer, Context context) {
this.observer = observer;
this.context = context;
connectivityManagerDelegate = new ConnectivityManagerDelegate(context);
wifiManagerDelegate = new WifiManagerDelegate(context);
final NetworkState networkState = connectivityManagerDelegate.getNetworkState();
connectionType = getConnectionType(networkState);
wifiSSID = getWifiSSID(networkState);
intentFilter = new IntentFilter(ConnectivityManager.CONNECTIVITY_ACTION);
if (PeerConnectionFactory.fieldTrialsFindFullName("IncludeWifiDirect").equals("Enabled")) {
wifiDirectManagerDelegate = new WifiDirectManagerDelegate(observer, context);
}
registerReceiver();
if (connectivityManagerDelegate.supportNetworkCallback()) {
// On Android 6.0.0, the WRITE_SETTINGS permission is necessary for
// requestNetwork, so it will fail. This was fixed in Android 6.0.1.
NetworkCallback tempNetworkCallback = new NetworkCallback();
try {
connectivityManagerDelegate.requestMobileNetwork(tempNetworkCallback);
} catch (java.lang.SecurityException e) {
Logging.w(TAG, "Unable to obtain permission to request a cellular network.");
tempNetworkCallback = null;
}
mobileNetworkCallback = tempNetworkCallback;
allNetworkCallback = new SimpleNetworkCallback();
connectivityManagerDelegate.registerNetworkCallback(allNetworkCallback);
} else {
mobileNetworkCallback = null;
allNetworkCallback = null;
}
}
public boolean supportNetworkCallback() {
return connectivityManagerDelegate.supportNetworkCallback();
}
/**
* Allows overriding the ConnectivityManagerDelegate for tests.
*/
void setConnectivityManagerDelegateForTests(ConnectivityManagerDelegate delegate) {
connectivityManagerDelegate = delegate;
}
/**
* Allows overriding the WifiManagerDelegate for tests.
*/
void setWifiManagerDelegateForTests(WifiManagerDelegate delegate) {
wifiManagerDelegate = delegate;
}
/**
* Returns whether the object has registered to receive network connectivity intents.
* Visible for testing.
*/
boolean isReceiverRegisteredForTesting() {
return isRegistered;
}
List<NetworkInformation> getActiveNetworkList() {
List<NetworkInformation> connectivityManagerList =
connectivityManagerDelegate.getActiveNetworkList();
if (connectivityManagerList == null) {
return null;
}
ArrayList<NetworkInformation> result =
new ArrayList<NetworkInformation>(connectivityManagerList);
if (wifiDirectManagerDelegate != null) {
result.addAll(wifiDirectManagerDelegate.getActiveNetworkList());
}
return result;
}
public void destroy() {
if (allNetworkCallback != null) {
connectivityManagerDelegate.releaseCallback(allNetworkCallback);
}
if (mobileNetworkCallback != null) {
connectivityManagerDelegate.releaseCallback(mobileNetworkCallback);
}
if (wifiDirectManagerDelegate != null) {
wifiDirectManagerDelegate.release();
}
unregisterReceiver();
}
/**
* Registers a BroadcastReceiver in the given context.
*/
private void registerReceiver() {
if (isRegistered)
return;
isRegistered = true;
context.registerReceiver(this, intentFilter);
}
/**
* Unregisters the BroadcastReceiver in the given context.
*/
private void unregisterReceiver() {
if (!isRegistered)
return;
isRegistered = false;
context.unregisterReceiver(this);
}
public NetworkState getCurrentNetworkState() {
return connectivityManagerDelegate.getNetworkState();
}
/**
* Returns NetID of device's current default connected network used for
* communication.
* Only implemented on Lollipop and newer releases, returns INVALID_NET_ID
* when not implemented.
*/
public long getDefaultNetId() {
return connectivityManagerDelegate.getDefaultNetId();
}
private static ConnectionType getConnectionType(
boolean isConnected, int networkType, int networkSubtype) {
if (!isConnected) {
return ConnectionType.CONNECTION_NONE;
}
switch (networkType) {
case ConnectivityManager.TYPE_ETHERNET:
return ConnectionType.CONNECTION_ETHERNET;
case ConnectivityManager.TYPE_WIFI:
return ConnectionType.CONNECTION_WIFI;
case ConnectivityManager.TYPE_WIMAX:
return ConnectionType.CONNECTION_4G;
case ConnectivityManager.TYPE_BLUETOOTH:
return ConnectionType.CONNECTION_BLUETOOTH;
case ConnectivityManager.TYPE_MOBILE:
// Use information from TelephonyManager to classify the connection.
switch (networkSubtype) {
case TelephonyManager.NETWORK_TYPE_GPRS:
case TelephonyManager.NETWORK_TYPE_EDGE:
case TelephonyManager.NETWORK_TYPE_CDMA:
case TelephonyManager.NETWORK_TYPE_1xRTT:
case TelephonyManager.NETWORK_TYPE_IDEN:
return ConnectionType.CONNECTION_2G;
case TelephonyManager.NETWORK_TYPE_UMTS:
case TelephonyManager.NETWORK_TYPE_EVDO_0:
case TelephonyManager.NETWORK_TYPE_EVDO_A:
case TelephonyManager.NETWORK_TYPE_HSDPA:
case TelephonyManager.NETWORK_TYPE_HSUPA:
case TelephonyManager.NETWORK_TYPE_HSPA:
case TelephonyManager.NETWORK_TYPE_EVDO_B:
case TelephonyManager.NETWORK_TYPE_EHRPD:
case TelephonyManager.NETWORK_TYPE_HSPAP:
return ConnectionType.CONNECTION_3G;
case TelephonyManager.NETWORK_TYPE_LTE:
return ConnectionType.CONNECTION_4G;
default:
return ConnectionType.CONNECTION_UNKNOWN_CELLULAR;
}
case ConnectivityManager.TYPE_VPN:
return ConnectionType.CONNECTION_VPN;
default:
return ConnectionType.CONNECTION_UNKNOWN;
}
}
public static ConnectionType getConnectionType(NetworkState networkState) {
return getConnectionType(networkState.isConnected(), networkState.getNetworkType(),
networkState.getNetworkSubType());
}
private static ConnectionType getUnderlyingConnectionTypeForVpn(NetworkState networkState) {
if (networkState.getNetworkType() != ConnectivityManager.TYPE_VPN) {
return ConnectionType.CONNECTION_NONE;
}
return getConnectionType(networkState.isConnected(),
networkState.getUnderlyingNetworkTypeForVpn(),
networkState.getUnderlyingNetworkSubtypeForVpn());
}
private String getWifiSSID(NetworkState networkState) {
if (getConnectionType(networkState) != ConnectionType.CONNECTION_WIFI)
return "";
return wifiManagerDelegate.getWifiSSID();
}
// BroadcastReceiver
@Override
public void onReceive(Context context, Intent intent) {
final NetworkState networkState = getCurrentNetworkState();
if (ConnectivityManager.CONNECTIVITY_ACTION.equals(intent.getAction())) {
connectionTypeChanged(networkState);
}
}
private void connectionTypeChanged(NetworkState networkState) {
ConnectionType newConnectionType = getConnectionType(networkState);
String newWifiSSID = getWifiSSID(networkState);
if (newConnectionType == connectionType && newWifiSSID.equals(wifiSSID))
return;
connectionType = newConnectionType;
wifiSSID = newWifiSSID;
Logging.d(TAG, "Network connectivity changed, type is: " + connectionType);
observer.onConnectionTypeChanged(newConnectionType);
}
/**
* Extracts NetID of network on Lollipop and NetworkHandle (which is mungled
* NetID) on Marshmallow and newer releases. Only available on Lollipop and
* newer releases. Returns long since getNetworkHandle returns long.
*/
@SuppressLint("NewApi")
private static long networkToNetId(Network network) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
return network.getNetworkHandle();
}
// NOTE(honghaiz): This depends on Android framework implementation details.
// These details cannot change because Lollipop has been released.
return Integer.parseInt(network.toString());
}
}
