| /* |
| * 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.support.annotation.Nullable; |
| 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. |
| */ |
| @Nullable 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(@Nullable 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(@Nullable 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(); |
| } |
| |
| @Nullable |
| 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 @Nullable NetworkInformation networkToInfo(@Nullable 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 { |
| @Nullable 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. |
| @Nullable 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(@Nullable 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. |
| @Nullable private final NetworkCallback mobileNetworkCallback; |
| // Used to receive updates on all networks. |
| @Nullable 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; |
| } |
| |
| @Nullable |
| 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()); |
| } |
| } |
