| /* |
| * Copyright (C) 2016 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.connectivity; |
| |
| import static android.net.NetworkCapabilities.NET_CAPABILITY_INTERNET; |
| import static android.net.NetworkCapabilities.TRANSPORT_CELLULAR; |
| import static android.net.NetworkCapabilities.TRANSPORT_VPN; |
| import static android.net.NetworkCapabilities.TRANSPORT_WIFI; |
| |
| import android.app.Notification; |
| import android.app.NotificationManager; |
| import android.app.PendingIntent; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.res.Resources; |
| import android.net.NetworkSpecifier; |
| import android.net.TelephonyNetworkSpecifier; |
| import android.net.wifi.WifiInfo; |
| import android.os.UserHandle; |
| import android.telephony.SubscriptionManager; |
| import android.telephony.TelephonyManager; |
| import android.text.TextUtils; |
| import android.util.Slog; |
| import android.util.SparseArray; |
| import android.util.SparseIntArray; |
| import android.widget.Toast; |
| |
| import com.android.internal.R; |
| import com.android.internal.annotations.VisibleForTesting; |
| import com.android.internal.messages.nano.SystemMessageProto.SystemMessage; |
| import com.android.internal.notification.SystemNotificationChannels; |
| |
| public class NetworkNotificationManager { |
| |
| |
| public static enum NotificationType { |
| LOST_INTERNET(SystemMessage.NOTE_NETWORK_LOST_INTERNET), |
| NETWORK_SWITCH(SystemMessage.NOTE_NETWORK_SWITCH), |
| NO_INTERNET(SystemMessage.NOTE_NETWORK_NO_INTERNET), |
| PARTIAL_CONNECTIVITY(SystemMessage.NOTE_NETWORK_PARTIAL_CONNECTIVITY), |
| SIGN_IN(SystemMessage.NOTE_NETWORK_SIGN_IN), |
| PRIVATE_DNS_BROKEN(SystemMessage.NOTE_NETWORK_PRIVATE_DNS_BROKEN); |
| |
| public final int eventId; |
| |
| NotificationType(int eventId) { |
| this.eventId = eventId; |
| Holder.sIdToTypeMap.put(eventId, this); |
| } |
| |
| private static class Holder { |
| private static SparseArray<NotificationType> sIdToTypeMap = new SparseArray<>(); |
| } |
| |
| public static NotificationType getFromId(int id) { |
| return Holder.sIdToTypeMap.get(id); |
| } |
| }; |
| |
| private static final String TAG = NetworkNotificationManager.class.getSimpleName(); |
| private static final boolean DBG = true; |
| private static final boolean VDBG = false; |
| |
| private final Context mContext; |
| private final TelephonyManager mTelephonyManager; |
| private final NotificationManager mNotificationManager; |
| // Tracks the types of notifications managed by this instance, from creation to cancellation. |
| private final SparseIntArray mNotificationTypeMap; |
| |
| public NetworkNotificationManager(Context c, TelephonyManager t, NotificationManager n) { |
| mContext = c; |
| mTelephonyManager = t; |
| mNotificationManager = n; |
| mNotificationTypeMap = new SparseIntArray(); |
| } |
| |
| @VisibleForTesting |
| protected static int approximateTransportType(NetworkAgentInfo nai) { |
| return nai.isVPN() ? TRANSPORT_VPN : getFirstTransportType(nai); |
| } |
| |
| // TODO: deal more gracefully with multi-transport networks. |
| private static int getFirstTransportType(NetworkAgentInfo nai) { |
| // TODO: The range is wrong, the safer and correct way is to change the range from |
| // MIN_TRANSPORT to MAX_TRANSPORT. |
| for (int i = 0; i < 64; i++) { |
| if (nai.networkCapabilities.hasTransport(i)) return i; |
| } |
| return -1; |
| } |
| |
| private static String getTransportName(final int transportType) { |
| Resources r = Resources.getSystem(); |
| String[] networkTypes = r.getStringArray(R.array.network_switch_type_name); |
| try { |
| return networkTypes[transportType]; |
| } catch (IndexOutOfBoundsException e) { |
| return r.getString(R.string.network_switch_type_name_unknown); |
| } |
| } |
| |
| private static int getIcon(int transportType) { |
| return (transportType == TRANSPORT_WIFI) |
| ? R.drawable.stat_notify_wifi_in_range : // TODO: Distinguish ! from ?. |
| R.drawable.stat_notify_rssi_in_range; |
| } |
| |
| /** |
| * Show or hide network provisioning notifications. |
| * |
| * We use notifications for two purposes: to notify that a network requires sign in |
| * (NotificationType.SIGN_IN), or to notify that a network does not have Internet access |
| * (NotificationType.NO_INTERNET). We display at most one notification per ID, so on a |
| * particular network we can display the notification type that was most recently requested. |
| * So for example if a captive portal fails to reply within a few seconds of connecting, we |
| * might first display NO_INTERNET, and then when the captive portal check completes, display |
| * SIGN_IN. |
| * |
| * @param id an identifier that uniquely identifies this notification. This must match |
| * between show and hide calls. We use the NetID value but for legacy callers |
| * we concatenate the range of types with the range of NetIDs. |
| * @param notifyType the type of the notification. |
| * @param nai the network with which the notification is associated. For a SIGN_IN, NO_INTERNET, |
| * or LOST_INTERNET notification, this is the network we're connecting to. For a |
| * NETWORK_SWITCH notification it's the network that we switched from. When this network |
| * disconnects the notification is removed. |
| * @param switchToNai for a NETWORK_SWITCH notification, the network we are switching to. Null |
| * in all other cases. Only used to determine the text of the notification. |
| */ |
| public void showNotification(int id, NotificationType notifyType, NetworkAgentInfo nai, |
| NetworkAgentInfo switchToNai, PendingIntent intent, boolean highPriority) { |
| final String tag = tagFor(id); |
| final int eventId = notifyType.eventId; |
| final int transportType; |
| final String name; |
| if (nai != null) { |
| transportType = approximateTransportType(nai); |
| final String extraInfo = nai.networkInfo.getExtraInfo(); |
| name = TextUtils.isEmpty(extraInfo) ? nai.networkCapabilities.getSsid() : extraInfo; |
| // Only notify for Internet-capable networks. |
| if (!nai.networkCapabilities.hasCapability(NET_CAPABILITY_INTERNET)) return; |
| } else { |
| // Legacy notifications. |
| transportType = TRANSPORT_CELLULAR; |
| name = null; |
| } |
| |
| // Clear any previous notification with lower priority, otherwise return. http://b/63676954. |
| // A new SIGN_IN notification with a new intent should override any existing one. |
| final int previousEventId = mNotificationTypeMap.get(id); |
| final NotificationType previousNotifyType = NotificationType.getFromId(previousEventId); |
| if (priority(previousNotifyType) > priority(notifyType)) { |
| Slog.d(TAG, String.format( |
| "ignoring notification %s for network %s with existing notification %s", |
| notifyType, id, previousNotifyType)); |
| return; |
| } |
| clearNotification(id); |
| |
| if (DBG) { |
| Slog.d(TAG, String.format( |
| "showNotification tag=%s event=%s transport=%s name=%s highPriority=%s", |
| tag, nameOf(eventId), getTransportName(transportType), name, highPriority)); |
| } |
| |
| Resources r = mContext.getResources(); |
| final CharSequence title; |
| final CharSequence details; |
| int icon = getIcon(transportType); |
| if (notifyType == NotificationType.NO_INTERNET && transportType == TRANSPORT_WIFI) { |
| title = r.getString(R.string.wifi_no_internet, |
| WifiInfo.sanitizeSsid(nai.networkCapabilities.getSsid())); |
| details = r.getString(R.string.wifi_no_internet_detailed); |
| } else if (notifyType == NotificationType.PRIVATE_DNS_BROKEN) { |
| if (transportType == TRANSPORT_CELLULAR) { |
| title = r.getString(R.string.mobile_no_internet); |
| } else if (transportType == TRANSPORT_WIFI) { |
| title = r.getString(R.string.wifi_no_internet, |
| WifiInfo.sanitizeSsid(nai.networkCapabilities.getSsid())); |
| } else { |
| title = r.getString(R.string.other_networks_no_internet); |
| } |
| details = r.getString(R.string.private_dns_broken_detailed); |
| } else if (notifyType == NotificationType.PARTIAL_CONNECTIVITY |
| && transportType == TRANSPORT_WIFI) { |
| title = r.getString(R.string.network_partial_connectivity, |
| WifiInfo.sanitizeSsid(nai.networkCapabilities.getSsid())); |
| details = r.getString(R.string.network_partial_connectivity_detailed); |
| } else if (notifyType == NotificationType.LOST_INTERNET && |
| transportType == TRANSPORT_WIFI) { |
| title = r.getString(R.string.wifi_no_internet, |
| WifiInfo.sanitizeSsid(nai.networkCapabilities.getSsid())); |
| details = r.getString(R.string.wifi_no_internet_detailed); |
| } else if (notifyType == NotificationType.SIGN_IN) { |
| switch (transportType) { |
| case TRANSPORT_WIFI: |
| title = r.getString(R.string.wifi_available_sign_in, 0); |
| details = r.getString(R.string.network_available_sign_in_detailed, |
| WifiInfo.sanitizeSsid(nai.networkCapabilities.getSsid())); |
| break; |
| case TRANSPORT_CELLULAR: |
| title = r.getString(R.string.network_available_sign_in, 0); |
| // TODO: Change this to pull from NetworkInfo once a printable |
| // name has been added to it |
| NetworkSpecifier specifier = nai.networkCapabilities.getNetworkSpecifier(); |
| int subId = SubscriptionManager.DEFAULT_SUBSCRIPTION_ID; |
| if (specifier instanceof TelephonyNetworkSpecifier) { |
| subId = ((TelephonyNetworkSpecifier) specifier).getSubscriptionId(); |
| } |
| |
| details = mTelephonyManager.createForSubscriptionId(subId) |
| .getNetworkOperatorName(); |
| break; |
| default: |
| title = r.getString(R.string.network_available_sign_in, 0); |
| details = r.getString(R.string.network_available_sign_in_detailed, name); |
| break; |
| } |
| } else if (notifyType == NotificationType.NETWORK_SWITCH) { |
| String fromTransport = getTransportName(transportType); |
| String toTransport = getTransportName(approximateTransportType(switchToNai)); |
| title = r.getString(R.string.network_switch_metered, toTransport); |
| details = r.getString(R.string.network_switch_metered_detail, toTransport, |
| fromTransport); |
| } else if (notifyType == NotificationType.NO_INTERNET |
| || notifyType == NotificationType.PARTIAL_CONNECTIVITY) { |
| // NO_INTERNET and PARTIAL_CONNECTIVITY notification for non-WiFi networks |
| // are sent, but they are not implemented yet. |
| return; |
| } else { |
| Slog.wtf(TAG, "Unknown notification type " + notifyType + " on network transport " |
| + getTransportName(transportType)); |
| return; |
| } |
| // When replacing an existing notification for a given network, don't alert, just silently |
| // update the existing notification. Note that setOnlyAlertOnce() will only work for the |
| // same id, and the id used here is the NotificationType which is different in every type of |
| // notification. This is required because the notification metrics only track the ID but not |
| // the tag. |
| final boolean hasPreviousNotification = previousNotifyType != null; |
| final String channelId = (highPriority && !hasPreviousNotification) |
| ? SystemNotificationChannels.NETWORK_ALERTS |
| : SystemNotificationChannels.NETWORK_STATUS; |
| Notification.Builder builder = new Notification.Builder(mContext, channelId) |
| .setWhen(System.currentTimeMillis()) |
| .setShowWhen(notifyType == NotificationType.NETWORK_SWITCH) |
| .setSmallIcon(icon) |
| .setAutoCancel(true) |
| .setTicker(title) |
| .setColor(mContext.getColor( |
| com.android.internal.R.color.system_notification_accent_color)) |
| .setContentTitle(title) |
| .setContentIntent(intent) |
| .setLocalOnly(true) |
| .setOnlyAlertOnce(true); |
| |
| if (notifyType == NotificationType.NETWORK_SWITCH) { |
| builder.setStyle(new Notification.BigTextStyle().bigText(details)); |
| } else { |
| builder.setContentText(details); |
| } |
| |
| if (notifyType == NotificationType.SIGN_IN) { |
| builder.extend(new Notification.TvExtender().setChannelId(channelId)); |
| } |
| |
| Notification notification = builder.build(); |
| |
| mNotificationTypeMap.put(id, eventId); |
| try { |
| mNotificationManager.notifyAsUser(tag, eventId, notification, UserHandle.ALL); |
| } catch (NullPointerException npe) { |
| Slog.d(TAG, "setNotificationVisible: visible notificationManager error", npe); |
| } |
| } |
| |
| /** |
| * Clear the notification with the given id, only if it matches the given type. |
| */ |
| public void clearNotification(int id, NotificationType notifyType) { |
| final int previousEventId = mNotificationTypeMap.get(id); |
| final NotificationType previousNotifyType = NotificationType.getFromId(previousEventId); |
| if (notifyType != previousNotifyType) { |
| return; |
| } |
| clearNotification(id); |
| } |
| |
| public void clearNotification(int id) { |
| if (mNotificationTypeMap.indexOfKey(id) < 0) { |
| return; |
| } |
| final String tag = tagFor(id); |
| final int eventId = mNotificationTypeMap.get(id); |
| if (DBG) { |
| Slog.d(TAG, String.format("clearing notification tag=%s event=%s", tag, |
| nameOf(eventId))); |
| } |
| try { |
| mNotificationManager.cancelAsUser(tag, eventId, UserHandle.ALL); |
| } catch (NullPointerException npe) { |
| Slog.d(TAG, String.format( |
| "failed to clear notification tag=%s event=%s", tag, nameOf(eventId)), npe); |
| } |
| mNotificationTypeMap.delete(id); |
| } |
| |
| /** |
| * Legacy provisioning notifications coming directly from DcTracker. |
| */ |
| public void setProvNotificationVisible(boolean visible, int id, String action) { |
| if (visible) { |
| Intent intent = new Intent(action); |
| PendingIntent pendingIntent = PendingIntent.getBroadcast(mContext, 0, intent, 0); |
| showNotification(id, NotificationType.SIGN_IN, null, null, pendingIntent, false); |
| } else { |
| clearNotification(id); |
| } |
| } |
| |
| public void showToast(NetworkAgentInfo fromNai, NetworkAgentInfo toNai) { |
| String fromTransport = getTransportName(approximateTransportType(fromNai)); |
| String toTransport = getTransportName(approximateTransportType(toNai)); |
| String text = mContext.getResources().getString( |
| R.string.network_switch_metered_toast, fromTransport, toTransport); |
| Toast.makeText(mContext, text, Toast.LENGTH_LONG).show(); |
| } |
| |
| @VisibleForTesting |
| static String tagFor(int id) { |
| return String.format("ConnectivityNotification:%d", id); |
| } |
| |
| @VisibleForTesting |
| static String nameOf(int eventId) { |
| NotificationType t = NotificationType.getFromId(eventId); |
| return (t != null) ? t.name() : "UNKNOWN"; |
| } |
| |
| /** |
| * A notification with a higher number will take priority over a notification with a lower |
| * number. |
| */ |
| private static int priority(NotificationType t) { |
| if (t == null) { |
| return 0; |
| } |
| switch (t) { |
| case SIGN_IN: |
| return 6; |
| case PARTIAL_CONNECTIVITY: |
| return 5; |
| case PRIVATE_DNS_BROKEN: |
| return 4; |
| case NO_INTERNET: |
| return 3; |
| case NETWORK_SWITCH: |
| return 2; |
| case LOST_INTERNET: |
| return 1; |
| default: |
| return 0; |
| } |
| } |
| } |
