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      1 /*
      2  * Copyright (C) 2014 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.systemui.statusbar.policy;
     18 
     19 import static android.net.ConnectivityManager.TYPE_MOBILE;
     20 import static android.net.NetworkStatsHistory.FIELD_RX_BYTES;
     21 import static android.net.NetworkStatsHistory.FIELD_TX_BYTES;
     22 import static android.telephony.TelephonyManager.SIM_STATE_READY;
     23 import static android.text.format.DateUtils.FORMAT_ABBREV_MONTH;
     24 import static android.text.format.DateUtils.FORMAT_SHOW_DATE;
     25 
     26 import android.content.Context;
     27 import android.net.ConnectivityManager;
     28 import android.net.INetworkStatsService;
     29 import android.net.INetworkStatsSession;
     30 import android.net.NetworkPolicy;
     31 import android.net.NetworkPolicyManager;
     32 import android.net.NetworkStatsHistory;
     33 import android.net.NetworkTemplate;
     34 import android.os.RemoteException;
     35 import android.os.ServiceManager;
     36 import android.telephony.TelephonyManager;
     37 import android.text.format.DateUtils;
     38 import android.text.format.Time;
     39 import android.util.Log;
     40 
     41 import com.android.systemui.statusbar.policy.NetworkController.DataUsageInfo;
     42 
     43 import java.util.Date;
     44 import java.util.Locale;
     45 
     46 public class MobileDataController {
     47     private static final String TAG = "MobileDataController";
     48     private static final boolean DEBUG = Log.isLoggable(TAG, Log.DEBUG);
     49 
     50     private static final long DEFAULT_WARNING_LEVEL = 2L * 1024 * 1024 * 1024;
     51     private static final int FIELDS = FIELD_RX_BYTES | FIELD_TX_BYTES;
     52     private static final StringBuilder PERIOD_BUILDER = new StringBuilder(50);
     53     private static final java.util.Formatter PERIOD_FORMATTER = new java.util.Formatter(
     54             PERIOD_BUILDER, Locale.getDefault());
     55 
     56     private final Context mContext;
     57     private final TelephonyManager mTelephonyManager;
     58     private final ConnectivityManager mConnectivityManager;
     59     private final INetworkStatsService mStatsService;
     60     private final NetworkPolicyManager mPolicyManager;
     61 
     62     private INetworkStatsSession mSession;
     63     private Callback mCallback;
     64 
     65     public MobileDataController(Context context) {
     66         mContext = context;
     67         mTelephonyManager = TelephonyManager.from(context);
     68         mConnectivityManager = ConnectivityManager.from(context);
     69         mStatsService = INetworkStatsService.Stub.asInterface(
     70                 ServiceManager.getService(Context.NETWORK_STATS_SERVICE));
     71         mPolicyManager = NetworkPolicyManager.from(mContext);
     72     }
     73 
     74     private INetworkStatsSession getSession() {
     75         if (mSession == null) {
     76             try {
     77                 mSession = mStatsService.openSession();
     78             } catch (RemoteException e) {
     79                 Log.w(TAG, "Failed to open stats session", e);
     80             } catch (RuntimeException e) {
     81                 Log.w(TAG, "Failed to open stats session", e);
     82             }
     83         }
     84         return mSession;
     85     }
     86 
     87     public void setCallback(Callback callback) {
     88         mCallback = callback;
     89     }
     90 
     91     private DataUsageInfo warn(String msg) {
     92         Log.w(TAG, "Failed to get data usage, " + msg);
     93         return null;
     94     }
     95 
     96     private static Time addMonth(Time t, int months) {
     97         final Time rt = new Time(t);
     98         rt.set(t.monthDay, t.month + months, t.year);
     99         rt.normalize(false);
    100         return rt;
    101     }
    102 
    103     public DataUsageInfo getDataUsageInfo() {
    104         final String subscriberId = getActiveSubscriberId(mContext);
    105         if (subscriberId == null) {
    106             return warn("no subscriber id");
    107         }
    108         final INetworkStatsSession session = getSession();
    109         if (session == null) {
    110             return warn("no stats session");
    111         }
    112         final NetworkTemplate template = NetworkTemplate.buildTemplateMobileAll(subscriberId);
    113         final NetworkPolicy policy = findNetworkPolicy(template);
    114         try {
    115             final NetworkStatsHistory history = mSession.getHistoryForNetwork(template, FIELDS);
    116             final long now = System.currentTimeMillis();
    117             final long start, end;
    118             if (policy != null && policy.cycleDay > 0) {
    119                 // period = determined from cycleDay
    120                 if (DEBUG) Log.d(TAG, "Cycle day=" + policy.cycleDay + " tz="
    121                         + policy.cycleTimezone);
    122                 final Time nowTime = new Time(policy.cycleTimezone);
    123                 nowTime.setToNow();
    124                 final Time policyTime = new Time(nowTime);
    125                 policyTime.set(policy.cycleDay, policyTime.month, policyTime.year);
    126                 policyTime.normalize(false);
    127                 if (nowTime.after(policyTime)) {
    128                     start = policyTime.toMillis(false);
    129                     end = addMonth(policyTime, 1).toMillis(false);
    130                 } else {
    131                     start = addMonth(policyTime, -1).toMillis(false);
    132                     end = policyTime.toMillis(false);
    133                 }
    134             } else {
    135                 // period = last 4 wks
    136                 end = now;
    137                 start = now - DateUtils.WEEK_IN_MILLIS * 4;
    138             }
    139             final long callStart = System.currentTimeMillis();
    140             final NetworkStatsHistory.Entry entry = history.getValues(start, end, now, null);
    141             final long callEnd = System.currentTimeMillis();
    142             if (DEBUG) Log.d(TAG, String.format("history call from %s to %s now=%s took %sms: %s",
    143                     new Date(start), new Date(end), new Date(now), callEnd - callStart,
    144                     historyEntryToString(entry)));
    145             if (entry == null) {
    146                 return warn("no entry data");
    147             }
    148             final long totalBytes = entry.rxBytes + entry.txBytes;
    149             final DataUsageInfo usage = new DataUsageInfo();
    150             usage.usageLevel = totalBytes;
    151             usage.period = formatDateRange(start, end);
    152             if (policy != null) {
    153                 usage.limitLevel = policy.limitBytes > 0 ? policy.limitBytes : 0;
    154                 usage.warningLevel = policy.warningBytes > 0 ? policy.warningBytes : 0;
    155             } else {
    156                 usage.warningLevel = DEFAULT_WARNING_LEVEL;
    157             }
    158             return usage;
    159         } catch (RemoteException e) {
    160             return warn("remote call failed");
    161         }
    162     }
    163 
    164     private NetworkPolicy findNetworkPolicy(NetworkTemplate template) {
    165         if (mPolicyManager == null || template == null) return null;
    166         final NetworkPolicy[] policies = mPolicyManager.getNetworkPolicies();
    167         if (policies == null) return null;
    168         final int N = policies.length;
    169         for (int i = 0; i < N; i++) {
    170             final NetworkPolicy policy = policies[i];
    171             if (policy != null && template.equals(policy.template)) {
    172                 return policy;
    173             }
    174         }
    175         return null;
    176     }
    177 
    178     private static String historyEntryToString(NetworkStatsHistory.Entry entry) {
    179         return entry == null ? null : new StringBuilder("Entry[")
    180                 .append("bucketDuration=").append(entry.bucketDuration)
    181                 .append(",bucketStart=").append(entry.bucketStart)
    182                 .append(",activeTime=").append(entry.activeTime)
    183                 .append(",rxBytes=").append(entry.rxBytes)
    184                 .append(",rxPackets=").append(entry.rxPackets)
    185                 .append(",txBytes=").append(entry.txBytes)
    186                 .append(",txPackets=").append(entry.txPackets)
    187                 .append(",operations=").append(entry.operations)
    188                 .append(']').toString();
    189     }
    190 
    191     public void setMobileDataEnabled(boolean enabled) {
    192         mTelephonyManager.setDataEnabled(enabled);
    193         if (mCallback != null) {
    194             mCallback.onMobileDataEnabled(enabled);
    195         }
    196     }
    197 
    198     public boolean isMobileDataSupported() {
    199         // require both supported network and ready SIM
    200         return mConnectivityManager.isNetworkSupported(TYPE_MOBILE)
    201                 && mTelephonyManager.getSimState() == SIM_STATE_READY;
    202     }
    203 
    204     public boolean isMobileDataEnabled() {
    205         return mTelephonyManager.getDataEnabled();
    206     }
    207 
    208     private static String getActiveSubscriberId(Context context) {
    209         final TelephonyManager tele = TelephonyManager.from(context);
    210         final String actualSubscriberId = tele.getSubscriberId();
    211         return actualSubscriberId;
    212     }
    213 
    214     private String formatDateRange(long start, long end) {
    215         final int flags = FORMAT_SHOW_DATE | FORMAT_ABBREV_MONTH;
    216         synchronized (PERIOD_BUILDER) {
    217             PERIOD_BUILDER.setLength(0);
    218             return DateUtils.formatDateRange(mContext, PERIOD_FORMATTER, start, end, flags, null)
    219                     .toString();
    220         }
    221     }
    222 
    223     public interface Callback {
    224         void onMobileDataEnabled(boolean enabled);
    225     }
    226 }
    227