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/*
* Copyright (C) 2020 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.wifitrackerlib;
import static androidx.core.util.Preconditions.checkNotNull;
import static com.android.wifitrackerlib.PasspointWifiEntry.uniqueIdToPasspointWifiEntryKey;
import static com.android.wifitrackerlib.WifiEntry.CONNECTED_STATE_CONNECTED;
import android.content.Context;
import android.content.Intent;
import android.net.ConnectivityManager;
import android.net.LinkProperties;
import android.net.NetworkInfo;
import android.net.NetworkScoreManager;
import android.net.wifi.ScanResult;
import android.net.wifi.WifiConfiguration;
import android.net.wifi.WifiInfo;
import android.net.wifi.WifiManager;
import android.net.wifi.hotspot2.PasspointConfiguration;
import android.os.Handler;
import android.text.TextUtils;
import android.util.Pair;
import androidx.annotation.AnyThread;
import androidx.annotation.NonNull;
import androidx.annotation.WorkerThread;
import androidx.lifecycle.Lifecycle;
import java.time.Clock;
import java.util.Collections;
import java.util.List;
import java.util.Map;
/**
* Implementation of NetworkDetailsTracker that tracks a single PasspointWifiEntry.
*/
class PasspointNetworkDetailsTracker extends NetworkDetailsTracker {
private static final String TAG = "PasspointNetworkDetailsTracker";
private final PasspointWifiEntry mChosenEntry;
PasspointNetworkDetailsTracker(@NonNull Lifecycle lifecycle,
@NonNull Context context,
@NonNull WifiManager wifiManager,
@NonNull ConnectivityManager connectivityManager,
@NonNull NetworkScoreManager networkScoreManager,
@NonNull Handler mainHandler,
@NonNull Handler workerHandler,
@NonNull Clock clock,
long maxScanAgeMillis,
long scanIntervalMillis,
String key) {
super(lifecycle, context, wifiManager, connectivityManager, networkScoreManager,
mainHandler, workerHandler, clock, maxScanAgeMillis, scanIntervalMillis, TAG);
PasspointConfiguration passpointConfig = mWifiManager.getPasspointConfigurations().stream()
.filter(config -> TextUtils.equals(
uniqueIdToPasspointWifiEntryKey(config.getUniqueId()), key))
.findAny().get();
checkNotNull(passpointConfig,
"Cannot find PasspointConfiguration with matching unique identifier: "
+ passpointConfig.getUniqueId());
mChosenEntry = new PasspointWifiEntry(mContext, mMainHandler, passpointConfig,
mWifiManager, false /* forSavedNetworksPage */);
cacheNewScanResults();
conditionallyUpdateScanResults(true /* lastScanSucceeded */);
conditionallyUpdateConfig();
final WifiInfo wifiInfo = mWifiManager.getConnectionInfo();
final NetworkInfo networkInfo = mConnectivityManager.getActiveNetworkInfo();
mChosenEntry.updateConnectionInfo(wifiInfo, networkInfo);
handleLinkPropertiesChanged(mConnectivityManager.getLinkProperties(
mWifiManager.getCurrentNetwork()));
}
@AnyThread
@Override
@NonNull
public WifiEntry getWifiEntry() {
return mChosenEntry;
}
@WorkerThread
@Override
protected void handleWifiStateChangedAction() {
conditionallyUpdateScanResults(true /* lastScanSucceeded */);
}
@WorkerThread
@Override
protected void handleScanResultsAvailableAction(@NonNull Intent intent) {
checkNotNull(intent, "Intent cannot be null!");
conditionallyUpdateScanResults(
intent.getBooleanExtra(WifiManager.EXTRA_RESULTS_UPDATED, true));
}
@WorkerThread
@Override
protected void handleConfiguredNetworksChangedAction(@NonNull Intent intent) {
checkNotNull(intent, "Intent cannot be null!");
conditionallyUpdateConfig();
}
@WorkerThread
@Override
protected void handleNetworkStateChangedAction(@NonNull Intent intent) {
checkNotNull(intent, "Intent cannot be null!");
mChosenEntry.updateConnectionInfo(mWifiManager.getConnectionInfo(),
(NetworkInfo) intent.getExtra(WifiManager.EXTRA_NETWORK_INFO));
}
@WorkerThread
@Override
protected void handleLinkPropertiesChanged(@NonNull LinkProperties linkProperties) {
if (mChosenEntry.getConnectedState() == CONNECTED_STATE_CONNECTED) {
mChosenEntry.updateLinkProperties(linkProperties);
}
}
@WorkerThread
private void updatePasspointWifiEntryScans(@NonNull List<ScanResult> scanResults) {
checkNotNull(scanResults, "Scan Result list should not be null!");
List<Pair<WifiConfiguration, Map<Integer, List<ScanResult>>>> matchingWifiConfigs =
mWifiManager.getAllMatchingWifiConfigs(scanResults);
for (Pair<WifiConfiguration, Map<Integer, List<ScanResult>>> pair : matchingWifiConfigs) {
final WifiConfiguration wifiConfig = pair.first;
final String key = uniqueIdToPasspointWifiEntryKey(wifiConfig.getKey());
if (TextUtils.equals(key, mChosenEntry.getKey())) {
mChosenEntry.updateScanResultInfo(wifiConfig,
pair.second.get(WifiManager.PASSPOINT_HOME_NETWORK),
pair.second.get(WifiManager.PASSPOINT_ROAMING_NETWORK));
break;
}
}
}
/**
* Updates the tracked entry's scan results up to the max scan age (or more, if the last scan
* was unsuccessful). If Wifi is disabled, the tracked entry's level will be cleared.
*/
private void conditionallyUpdateScanResults(boolean lastScanSucceeded) {
if (mWifiManager.getWifiState() == WifiManager.WIFI_STATE_DISABLED) {
mChosenEntry.updateScanResultInfo(null /* wifiConfig */,
Collections.emptyList(), Collections.emptyList());
return;
}
long scanAgeWindow = mMaxScanAgeMillis;
if (lastScanSucceeded) {
cacheNewScanResults();
} else {
// Scan failed, increase scan age window to prevent WifiEntry list from
// clearing prematurely.
scanAgeWindow += mScanIntervalMillis;
}
updatePasspointWifiEntryScans(mScanResultUpdater.getScanResults(scanAgeWindow));
}
/**
* Updates the tracked entry's PasspointConfiguration from getPasspointConfigurations()
*/
private void conditionallyUpdateConfig() {
mWifiManager.getPasspointConfigurations().stream()
.filter(config -> TextUtils.equals(
uniqueIdToPasspointWifiEntryKey(config.getUniqueId()),
mChosenEntry.getKey()))
.findAny().ifPresent(config -> mChosenEntry.updatePasspointConfig(config));
}
/**
* Updates ScanResultUpdater with new ScanResults.
*/
private void cacheNewScanResults() {
mScanResultUpdater.update(mWifiManager.getScanResults());
}
}
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