| /* |
| * Copyright (C) 2014 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.systemui.statusbar.policy; |
| |
| import android.app.ActivityManager; |
| import android.content.BroadcastReceiver; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.IntentFilter; |
| import android.net.wifi.ScanResult; |
| import android.net.wifi.WifiConfiguration; |
| import android.net.wifi.WifiConfiguration.KeyMgmt; |
| import android.net.wifi.WifiInfo; |
| import android.net.wifi.WifiManager; |
| import android.net.wifi.WifiManager.ActionListener; |
| import android.os.UserHandle; |
| import android.os.UserManager; |
| import android.provider.Settings; |
| import android.text.TextUtils; |
| import android.util.ArrayMap; |
| import android.util.ArraySet; |
| import android.util.Log; |
| |
| import com.android.systemui.R; |
| |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.Comparator; |
| import java.util.List; |
| |
| |
| // TODO: Unify this logic with platform settings (see WifiSettings and AccessPoint). There is a |
| // fair amount of complexity here in statuses and logic beyond just connected/disconnected. |
| public class AccessPointControllerImpl implements NetworkController.AccessPointController { |
| private static final String TAG = "AccessPointController"; |
| private static final boolean DEBUG = Log.isLoggable(TAG, Log.DEBUG); |
| |
| // This string extra specifies a network to open the connect dialog on, so the user can enter |
| // network credentials. This is used by quick settings for secured networks. |
| private static final String EXTRA_START_CONNECT_SSID = "wifi_start_connect_ssid"; |
| |
| private static final int[] ICONS = { |
| R.drawable.ic_qs_wifi_0, |
| R.drawable.ic_qs_wifi_full_1, |
| R.drawable.ic_qs_wifi_full_2, |
| R.drawable.ic_qs_wifi_full_3, |
| R.drawable.ic_qs_wifi_full_4, |
| }; |
| |
| private final Context mContext; |
| private final ArrayList<AccessPointCallback> mCallbacks = new ArrayList<AccessPointCallback>(); |
| private final WifiManager mWifiManager; |
| private final UserManager mUserManager; |
| private final Receiver mReceiver = new Receiver(); |
| |
| private boolean mScanning; |
| private int mCurrentUser; |
| |
| public AccessPointControllerImpl(Context context) { |
| mContext = context; |
| mWifiManager = (WifiManager) mContext.getSystemService(Context.WIFI_SERVICE); |
| mUserManager = (UserManager) mContext.getSystemService(Context.USER_SERVICE); |
| mCurrentUser = ActivityManager.getCurrentUser(); |
| } |
| |
| public boolean canConfigWifi() { |
| return !mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_WIFI, |
| new UserHandle(mCurrentUser)); |
| } |
| |
| public void onUserSwitched(int newUserId) { |
| mCurrentUser = newUserId; |
| } |
| |
| @Override |
| public void addAccessPointCallback(AccessPointCallback callback) { |
| if (callback == null || mCallbacks.contains(callback)) return; |
| if (DEBUG) Log.d(TAG, "addCallback " + callback); |
| mCallbacks.add(callback); |
| mReceiver.setListening(!mCallbacks.isEmpty()); |
| } |
| |
| @Override |
| public void removeAccessPointCallback(AccessPointCallback callback) { |
| if (callback == null) return; |
| if (DEBUG) Log.d(TAG, "removeCallback " + callback); |
| mCallbacks.remove(callback); |
| mReceiver.setListening(!mCallbacks.isEmpty()); |
| } |
| |
| @Override |
| public void scanForAccessPoints() { |
| if (mScanning) return; |
| if (DEBUG) Log.d(TAG, "scan!"); |
| mScanning = mWifiManager.startScan(); |
| // Grab current networks immediately while we wait for scan. |
| updateAccessPoints(); |
| } |
| |
| public boolean connect(AccessPoint ap) { |
| if (ap == null) return false; |
| if (DEBUG) Log.d(TAG, "connect networkId=" + ap.networkId); |
| if (ap.networkId < 0) { |
| // Unknown network, need to add it. |
| if (ap.hasSecurity) { |
| Intent intent = new Intent(Settings.ACTION_WIFI_SETTINGS); |
| intent.putExtra(EXTRA_START_CONNECT_SSID, ap.ssid); |
| intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); |
| mContext.startActivity(intent); |
| return true; |
| } else { |
| WifiConfiguration config = new WifiConfiguration(); |
| config.SSID = "\"" + ap.ssid + "\""; |
| config.allowedKeyManagement.set(KeyMgmt.NONE); |
| mWifiManager.connect(config, mConnectListener); |
| } |
| } else { |
| mWifiManager.connect(ap.networkId, mConnectListener); |
| } |
| return false; |
| } |
| |
| private void fireCallback(AccessPoint[] aps) { |
| for (AccessPointCallback callback : mCallbacks) { |
| callback.onAccessPointsChanged(aps); |
| } |
| } |
| |
| private static String trimDoubleQuotes(String v) { |
| return v != null && v.length() >= 2 && v.charAt(0) == '\"' |
| && v.charAt(v.length() - 1) == '\"' ? v.substring(1, v.length() - 1) : v; |
| } |
| |
| private int getConnectedNetworkId(WifiInfo wifiInfo) { |
| return wifiInfo != null ? wifiInfo.getNetworkId() : AccessPoint.NO_NETWORK; |
| } |
| |
| private ArrayMap<String, WifiConfiguration> getConfiguredNetworksBySsid() { |
| final List<WifiConfiguration> configs = mWifiManager.getConfiguredNetworks(); |
| if (configs == null || configs.size() == 0) return ArrayMap.EMPTY; |
| final ArrayMap<String, WifiConfiguration> rt = new ArrayMap<String, WifiConfiguration>(); |
| for (WifiConfiguration config : configs) { |
| rt.put(trimDoubleQuotes(config.SSID), config); |
| } |
| return rt; |
| } |
| |
| private void updateAccessPoints() { |
| final WifiInfo wifiInfo = mWifiManager.getConnectionInfo(); |
| final int connectedNetworkId = getConnectedNetworkId(wifiInfo); |
| if (DEBUG) Log.d(TAG, "connectedNetworkId: " + connectedNetworkId); |
| final List<ScanResult> scanResults = mWifiManager.getScanResults(); |
| final ArrayMap<String, WifiConfiguration> configured = getConfiguredNetworksBySsid(); |
| if (DEBUG) Log.d(TAG, "scanResults: " + scanResults); |
| final List<AccessPoint> aps = new ArrayList<AccessPoint>(scanResults.size()); |
| final ArraySet<String> ssids = new ArraySet<String>(); |
| for (ScanResult scanResult : scanResults) { |
| if (scanResult == null) { |
| continue; |
| } |
| final String ssid = scanResult.SSID; |
| if (TextUtils.isEmpty(ssid) || ssids.contains(ssid)) continue; |
| ssids.add(ssid); |
| final WifiConfiguration config = configured.get(ssid); |
| final int level = WifiManager.calculateSignalLevel(scanResult.level, ICONS.length); |
| final AccessPoint ap = new AccessPoint(); |
| ap.isConfigured = config != null; |
| ap.networkId = config != null ? config.networkId : AccessPoint.NO_NETWORK; |
| ap.ssid = ssid; |
| ap.iconId = ICONS[level]; |
| // Connected if either: |
| // -The network ID in the active WifiInfo matches this network's ID. |
| // -The network is ephemeral (no configuration) but the SSID matches. |
| ap.isConnected = (ap.networkId != AccessPoint.NO_NETWORK |
| && ap.networkId == connectedNetworkId) || |
| (ap.networkId == WifiConfiguration.INVALID_NETWORK_ID && wifiInfo != null && |
| ap.ssid.equals(trimDoubleQuotes(wifiInfo.getSSID()))); |
| ap.level = level; |
| // Based on Settings AccessPoint#getSecurity, keep up to date |
| // with better methods of determining no security or not. |
| ap.hasSecurity = scanResult.capabilities.contains("WEP") |
| || scanResult.capabilities.contains("PSK") |
| || scanResult.capabilities.contains("EAP"); |
| aps.add(ap); |
| } |
| Collections.sort(aps, mByStrength); |
| fireCallback(aps.toArray(new AccessPoint[aps.size()])); |
| } |
| |
| private final ActionListener mConnectListener = new ActionListener() { |
| @Override |
| public void onSuccess() { |
| if (DEBUG) Log.d(TAG, "connect success"); |
| } |
| |
| @Override |
| public void onFailure(int reason) { |
| if (DEBUG) Log.d(TAG, "connect failure reason=" + reason); |
| } |
| }; |
| |
| private final Comparator<AccessPoint> mByStrength = new Comparator<AccessPoint> () { |
| @Override |
| public int compare(AccessPoint lhs, AccessPoint rhs) { |
| return -Integer.compare(score(lhs), score(rhs)); |
| } |
| |
| private int score(AccessPoint ap) { |
| return ap.level + (ap.isConnected ? 20 : 0) + (ap.isConfigured ? 10 : 0); |
| } |
| }; |
| |
| private final class Receiver extends BroadcastReceiver { |
| private boolean mRegistered; |
| |
| public void setListening(boolean listening) { |
| if (listening && !mRegistered) { |
| if (DEBUG) Log.d(TAG, "Registering receiver"); |
| final IntentFilter filter = new IntentFilter(); |
| filter.addAction(WifiManager.WIFI_STATE_CHANGED_ACTION); |
| filter.addAction(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION); |
| filter.addAction(WifiManager.NETWORK_IDS_CHANGED_ACTION); |
| filter.addAction(WifiManager.SUPPLICANT_STATE_CHANGED_ACTION); |
| filter.addAction(WifiManager.CONFIGURED_NETWORKS_CHANGED_ACTION); |
| filter.addAction(WifiManager.LINK_CONFIGURATION_CHANGED_ACTION); |
| filter.addAction(WifiManager.NETWORK_STATE_CHANGED_ACTION); |
| filter.addAction(WifiManager.RSSI_CHANGED_ACTION); |
| mContext.registerReceiver(this, filter); |
| mRegistered = true; |
| } else if (!listening && mRegistered) { |
| if (DEBUG) Log.d(TAG, "Unregistering receiver"); |
| mContext.unregisterReceiver(this); |
| mRegistered = false; |
| } |
| } |
| |
| @Override |
| public void onReceive(Context context, Intent intent) { |
| if (DEBUG) Log.d(TAG, "onReceive " + intent.getAction()); |
| if (WifiManager.SCAN_RESULTS_AVAILABLE_ACTION.equals(intent.getAction())) { |
| updateAccessPoints(); |
| mScanning = false; |
| } |
| } |
| } |
| } |