WifiAutoJoinController.java revision 2451dbcc4f9641df188326215b204b798eb70c46
1f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle/* 262f1d0ca8ea4466628f6ff179b1f20e1279fa7e0vandwalle * Copyright (C) 2014 The Android Open Source Project 3f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle * 4f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle * Licensed under the Apache License, Version 2.0 (the "License"); 5f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle * you may not use this file except in compliance with the License. 6f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle * You may obtain a copy of the License at 7f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle * 8f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle * http://www.apache.org/licenses/LICENSE-2.0 9f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle * 10f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle * Unless required by applicable law or agreed to in writing, software 11f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle * distributed under the License is distributed on an "AS IS" BASIS, 12f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle * See the License for the specific language governing permissions and 14f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle * limitations under the License. 15f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle */ 16f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 17f22d23092ab37286a5ef9d257d5bb32c421d2669vandwallepackage com.android.server.wifi; 18f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 19f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalleimport android.content.Context; 20f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 21f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalleimport android.net.NetworkKey; 22f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalleimport android.net.NetworkScoreManager; 230c8b99a3b78e458a5617cc449e2efe69c5bdd531vandwalleimport android.net.WifiKey; 24f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalleimport android.net.wifi.WifiConfiguration; 25f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalleimport android.net.wifi.ScanResult; 26f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalleimport android.net.wifi.WifiManager; 27f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 28f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalleimport android.os.SystemClock; 29b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalleimport android.os.Process; 30f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalleimport android.util.Log; 31f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 320c8b99a3b78e458a5617cc449e2efe69c5bdd531vandwalleimport java.util.ArrayList; 33f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalleimport java.util.Iterator; 34f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalleimport java.util.HashMap; 35f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalleimport java.util.List; 36f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 37f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle/** 38f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle * AutoJoin controller is responsible for WiFi Connect decision 39f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle * 40f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle * It runs in the thread context of WifiStateMachine 41f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle * 42f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle */ 43f22d23092ab37286a5ef9d257d5bb32c421d2669vandwallepublic class WifiAutoJoinController { 44f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 45f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle private Context mContext; 46f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle private WifiStateMachine mWifiStateMachine; 47f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle private WifiConfigStore mWifiConfigStore; 48f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle private WifiNative mWifiNative; 49f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 50f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle private NetworkScoreManager scoreManager; 51f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle private WifiNetworkScoreCache mNetworkScoreCache; 52f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 53f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle private static final String TAG = "WifiAutoJoinController "; 54ed9938883ae2dade81c8be6cd6ceaef3febd5239vandwalle private static boolean DBG = false; 55ed9938883ae2dade81c8be6cd6ceaef3febd5239vandwalle private static boolean VDBG = false; 56f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle private static final boolean mStaStaSupported = false; 57f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle private static final int SCAN_RESULT_CACHE_SIZE = 80; 58f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 59453aee50caf7e332e77ab3d995d7c87a958e4fd4vandwalle private String mCurrentConfigurationKey = null; //used by autojoin 60f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 61f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle private HashMap<String, ScanResult> scanResultCache = 62f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle new HashMap<String, ScanResult>(); 63f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 64931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle // Lose the non-auth failure blacklisting after 8 hours 654dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle private final static long loseBlackListHardMilli = 1000 * 60 * 60 * 8; 66931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle // Lose some temporary blacklisting after 30 minutes 674dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle private final static long loseBlackListSoftMilli = 1000 * 60 * 30; 6827355a942653264388e909a4276196ee63e57811vandwalle 69b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle public static final int AUTO_JOIN_IDLE = 0; 70b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle public static final int AUTO_JOIN_ROAMING = 1; 71b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle public static final int AUTO_JOIN_EXTENDED_ROAMING = 2; 72b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle public static final int AUTO_JOIN_OUT_OF_NETWORK_ROAMING = 3; 73b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle 74f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle WifiAutoJoinController(Context c, WifiStateMachine w, WifiConfigStore s, 75f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle WifiTrafficPoller t, WifiNative n) { 76f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle mContext = c; 77f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle mWifiStateMachine = w; 78f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle mWifiConfigStore = s; 79f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle mWifiNative = n; 80f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle mNetworkScoreCache = null; 8121bc54cb37a0085b1c909cb4d55ebb12a2facefbvandwalle scoreManager = 8221bc54cb37a0085b1c909cb4d55ebb12a2facefbvandwalle (NetworkScoreManager) mContext.getSystemService(Context.NETWORK_SCORE_SERVICE); 83f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle if (scoreManager == null) 84f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle logDbg("Registered scoreManager NULL " + " service " + Context.NETWORK_SCORE_SERVICE); 85f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 86f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle if (scoreManager != null) { 87f13817203179f41620514718c8668ae7e418f8afJeff Davidson mNetworkScoreCache = new WifiNetworkScoreCache(mContext); 88f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle scoreManager.registerNetworkScoreCache(NetworkKey.TYPE_WIFI, mNetworkScoreCache); 89f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } else { 90f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle logDbg("No network score service: Couldnt register as a WiFi score Manager, type=" 91f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle + Integer.toString(NetworkKey.TYPE_WIFI) 92f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle + " service " + Context.NETWORK_SCORE_SERVICE); 93f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle mNetworkScoreCache = null; 94f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 95f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 96f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 97ed9938883ae2dade81c8be6cd6ceaef3febd5239vandwalle void enableVerboseLogging(int verbose) { 98ed9938883ae2dade81c8be6cd6ceaef3febd5239vandwalle if (verbose > 0 ) { 99abde872adced15dfb6781fb71959453d963326dbYuhao Zheng DBG = true; 100ed9938883ae2dade81c8be6cd6ceaef3febd5239vandwalle VDBG = true; 101ed9938883ae2dade81c8be6cd6ceaef3febd5239vandwalle } else { 102abde872adced15dfb6781fb71959453d963326dbYuhao Zheng DBG = false; 103ed9938883ae2dade81c8be6cd6ceaef3febd5239vandwalle VDBG = false; 104ed9938883ae2dade81c8be6cd6ceaef3febd5239vandwalle } 105ed9938883ae2dade81c8be6cd6ceaef3febd5239vandwalle } 106ed9938883ae2dade81c8be6cd6ceaef3febd5239vandwalle 10721bc54cb37a0085b1c909cb4d55ebb12a2facefbvandwalle int mScanResultMaximumAge = 30000; /* milliseconds unit */ 108f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 109931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle /** 110931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle * Flush out scan results older than mScanResultMaximumAge 111ecd2b88214b5d214fd1f63a9560caff9058912ddvandwalle * 112931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle */ 113f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle private void ageScanResultsOut(int delay) { 114f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle if (delay <= 0) { 115931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle delay = mScanResultMaximumAge; // Something sane 116f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 117b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle long milli = System.currentTimeMillis(); 118f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle if (VDBG) { 119f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle logDbg("ageScanResultsOut delay " + Integer.valueOf(delay) + " size " 120f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle + Integer.valueOf(scanResultCache.size()) + " now " + Long.valueOf(milli)); 121f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 122f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 123f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle Iterator<HashMap.Entry<String,ScanResult>> iter = scanResultCache.entrySet().iterator(); 124f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle while (iter.hasNext()) { 125f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle HashMap.Entry<String,ScanResult> entry = iter.next(); 126f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle ScanResult result = entry.getValue(); 127f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 128f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle if ((result.seen + delay) < milli) { 129f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle iter.remove(); 130f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 131f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 132f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 133f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 134f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle void addToScanCache(List<ScanResult> scanList) { 135f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle WifiConfiguration associatedConfig; 136f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 1370c8b99a3b78e458a5617cc449e2efe69c5bdd531vandwalle ArrayList<NetworkKey> unknownScanResults = new ArrayList<NetworkKey>(); 1380c8b99a3b78e458a5617cc449e2efe69c5bdd531vandwalle 139f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle for(ScanResult result: scanList) { 1401fcf3c6d2b9ed65573e1e7c55fc5a30ebd364c4fYuhao Zheng if (result.SSID == null) continue; 141f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle result.seen = System.currentTimeMillis(); 142f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 143f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle ScanResult sr = scanResultCache.get(result.BSSID); 144f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle if (sr != null) { 145931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle // If there was a previous cache result for this BSSID, average the RSSI values 146f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 147f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle int previous_rssi = sr.level; 148f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle long previously_seen_milli = sr.seen; 149f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 150931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle // Average RSSI with previously seen instances of this scan result 151f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle int avg_rssi = result.level; 152f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 153f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle if ((previously_seen_milli > 0) 154f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle && (previously_seen_milli < mScanResultMaximumAge/2)) { 155f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle /* 156f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle * 157f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle * previously_seen_milli = 0 => RSSI = 0.5 * previous_seen_rssi + 0.5 * new_rssi 158f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle * 159f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle * If previously_seen_milli is 15+ seconds old: 160f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle * previously_seen_milli = 15000 => RSSI = new_rssi 161f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle * 162f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle */ 163f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 164f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle double alpha = 0.5 - (double)previously_seen_milli 165f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle / (double)mScanResultMaximumAge; 166f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 167f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle avg_rssi = (int)((double)avg_rssi * (1-alpha) + (double)previous_rssi * alpha); 168f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 169f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle result.level = avg_rssi; 170f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 171931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle // Remove the previous Scan Result 172f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle scanResultCache.remove(result.BSSID); 1730c8b99a3b78e458a5617cc449e2efe69c5bdd531vandwalle } else { 1740c8b99a3b78e458a5617cc449e2efe69c5bdd531vandwalle if (!mNetworkScoreCache.isScoredNetwork(result)) { 17521bc54cb37a0085b1c909cb4d55ebb12a2facefbvandwalle WifiKey wkey; 176931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle // Quoted SSIDs are the only one valid at this stage 17721bc54cb37a0085b1c909cb4d55ebb12a2facefbvandwalle try { 17821bc54cb37a0085b1c909cb4d55ebb12a2facefbvandwalle wkey = new WifiKey("\"" + result.SSID + "\"", result.BSSID); 17921bc54cb37a0085b1c909cb4d55ebb12a2facefbvandwalle } catch (IllegalArgumentException e) { 18021bc54cb37a0085b1c909cb4d55ebb12a2facefbvandwalle logDbg("AutoJoinController: received badly encoded SSID=[" + result.SSID + 18121bc54cb37a0085b1c909cb4d55ebb12a2facefbvandwalle "] ->skipping this network"); 18221bc54cb37a0085b1c909cb4d55ebb12a2facefbvandwalle wkey = null; 18321bc54cb37a0085b1c909cb4d55ebb12a2facefbvandwalle } 18421bc54cb37a0085b1c909cb4d55ebb12a2facefbvandwalle if (wkey != null) { 18521bc54cb37a0085b1c909cb4d55ebb12a2facefbvandwalle NetworkKey nkey = new NetworkKey(wkey); 1862451dbcc4f9641df188326215b204b798eb70c46vandwalle //if we don't know this scan result then request a score from the scorer 18721bc54cb37a0085b1c909cb4d55ebb12a2facefbvandwalle unknownScanResults.add(nkey); 18821bc54cb37a0085b1c909cb4d55ebb12a2facefbvandwalle } 1890c8b99a3b78e458a5617cc449e2efe69c5bdd531vandwalle } 190f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 191f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 192f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle scanResultCache.put(result.BSSID, new ScanResult(result)); 193f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 194931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle // Add this BSSID to the scanResultCache of the relevant WifiConfiguration 195f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle associatedConfig = mWifiConfigStore.updateSavedNetworkHistory(result); 196f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 197931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle // Try to associate this BSSID to an existing Saved WifiConfiguration 198f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle if (associatedConfig == null) { 199f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle associatedConfig = mWifiConfigStore.associateWithConfiguration(result); 2001fcf3c6d2b9ed65573e1e7c55fc5a30ebd364c4fYuhao Zheng if (associatedConfig != null && associatedConfig.SSID != null) { 201f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle if (VDBG) { 202f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle logDbg("addToScanCache save associated config " 203f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle + associatedConfig.SSID + " with " + associatedConfig.SSID); 204f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 205f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle mWifiStateMachine.sendMessage(WifiManager.SAVE_NETWORK, associatedConfig); 206f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 207f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 208f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 2090c8b99a3b78e458a5617cc449e2efe69c5bdd531vandwalle 2100c8b99a3b78e458a5617cc449e2efe69c5bdd531vandwalle if (unknownScanResults.size() != 0) { 2110c8b99a3b78e458a5617cc449e2efe69c5bdd531vandwalle NetworkKey[] newKeys = 2120c8b99a3b78e458a5617cc449e2efe69c5bdd531vandwalle unknownScanResults.toArray(new NetworkKey[unknownScanResults.size()]); 213931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle // Kick the score manager, we will get updated scores asynchronously 2140c8b99a3b78e458a5617cc449e2efe69c5bdd531vandwalle scoreManager.requestScores(newKeys); 2150c8b99a3b78e458a5617cc449e2efe69c5bdd531vandwalle } 216f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 217f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 218f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle void logDbg(String message) { 2190888ce6f90bdaeee799dd8361ea4781e23a33b87vandwalle logDbg(message, false); 220ecd2b88214b5d214fd1f63a9560caff9058912ddvandwalle } 221ecd2b88214b5d214fd1f63a9560caff9058912ddvandwalle 222ecd2b88214b5d214fd1f63a9560caff9058912ddvandwalle void logDbg(String message, boolean stackTrace) { 223f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle long now = SystemClock.elapsedRealtimeNanos(); 2240888ce6f90bdaeee799dd8361ea4781e23a33b87vandwalle String ts = String.format("[%,d us] ", now / 1000); 225ecd2b88214b5d214fd1f63a9560caff9058912ddvandwalle if (stackTrace) { 226ecd2b88214b5d214fd1f63a9560caff9058912ddvandwalle Log.e(TAG, ts + message + " stack:" 227ecd2b88214b5d214fd1f63a9560caff9058912ddvandwalle + Thread.currentThread().getStackTrace()[2].getMethodName() + " - " 228ecd2b88214b5d214fd1f63a9560caff9058912ddvandwalle + Thread.currentThread().getStackTrace()[3].getMethodName() + " - " 229ecd2b88214b5d214fd1f63a9560caff9058912ddvandwalle + Thread.currentThread().getStackTrace()[4].getMethodName() + " - " 230ecd2b88214b5d214fd1f63a9560caff9058912ddvandwalle + Thread.currentThread().getStackTrace()[5].getMethodName()); 231ecd2b88214b5d214fd1f63a9560caff9058912ddvandwalle } else { 232ecd2b88214b5d214fd1f63a9560caff9058912ddvandwalle Log.e(TAG, ts + message); 233ecd2b88214b5d214fd1f63a9560caff9058912ddvandwalle } 234f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 235f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 236931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle // Called directly from WifiStateMachine 237f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle void newSupplicantResults() { 238f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle List<ScanResult> scanList = mWifiStateMachine.syncGetScanResultsList(); 239f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle addToScanCache(scanList); 240f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle ageScanResultsOut(mScanResultMaximumAge); 241f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle if (DBG) 242f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle logDbg("newSupplicantResults size=" + Integer.valueOf(scanResultCache.size()) ); 243f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 244f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle attemptAutoJoin(); 245f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle mWifiConfigStore.writeKnownNetworkHistory(); 246f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 247f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 248f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 249f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 250931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle /** 251931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle * Not used at the moment 252f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle * should be a call back from WifiScanner HAL ?? 253f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle * this function is not hooked and working yet, it will receive scan results from WifiScanners 254f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle * with the list of IEs,then populate the capabilities by parsing the IEs and inject the scan 255f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle * results as normal. 256f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle */ 257f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle void newHalScanResults() { 258f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle List<ScanResult> scanList = null;//mWifiScanner.syncGetScanResultsList(); 259f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle String akm = WifiParser.parse_akm(null, null); 260f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle logDbg(akm); 261f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle addToScanCache(scanList); 262f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle ageScanResultsOut(0); 263f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle attemptAutoJoin(); 264f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle mWifiConfigStore.writeKnownNetworkHistory(); 265f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 266f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 267931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle /** 268931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle * network link quality changed, called directly from WifiTrafficPoller, 269931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle * or by listening to Link Quality intent 270931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle */ 271f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle void linkQualitySignificantChange() { 272f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle attemptAutoJoin(); 273f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 274f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 275931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle /** 276f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle * compare a WifiConfiguration against the current network, return a delta score 277f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle * If not associated, and the candidate will always be better 278f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle * For instance if the candidate is a home network versus an unknown public wifi, 279f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle * the delta will be infinite, else compare Kepler scores etc… 280b57df70bdf17ba45ef4d18b11414cb24dcbe1fb9vandwalle * Negatve return values from this functions are meaningless per se, just trying to 281b57df70bdf17ba45ef4d18b11414cb24dcbe1fb9vandwalle * keep them distinct for debug purpose (i.e. -1, -2 etc...) 282931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle */ 283f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle private int compareNetwork(WifiConfiguration candidate) { 284b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle if (candidate == null) 285b57df70bdf17ba45ef4d18b11414cb24dcbe1fb9vandwalle return -3; 286b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle 287f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle WifiConfiguration currentNetwork = mWifiStateMachine.getCurrentWifiConfiguration(); 288b57df70bdf17ba45ef4d18b11414cb24dcbe1fb9vandwalle if (currentNetwork == null) { 289b57df70bdf17ba45ef4d18b11414cb24dcbe1fb9vandwalle return 1000; 290b57df70bdf17ba45ef4d18b11414cb24dcbe1fb9vandwalle } 291f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 292f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle if (candidate.configKey(true).equals(currentNetwork.configKey(true))) { 293b57df70bdf17ba45ef4d18b11414cb24dcbe1fb9vandwalle return -2; 294f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 295f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 296f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle int order = compareWifiConfigurations(currentNetwork, candidate); 297f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 298f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle if (order > 0) { 299f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle //ascending: currentNetwork < candidate 300f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle return 10; //will try switch over to the candidate 301f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 302f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 303f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle return 0; 304f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 305f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 306ecd2b88214b5d214fd1f63a9560caff9058912ddvandwalle /** 307ecd2b88214b5d214fd1f63a9560caff9058912ddvandwalle * update the network history fields fo that configuration 308ecd2b88214b5d214fd1f63a9560caff9058912ddvandwalle * - if userTriggered, we mark the configuration as "non selfAdded" since the user has seen it 309ecd2b88214b5d214fd1f63a9560caff9058912ddvandwalle * and took over management 310ecd2b88214b5d214fd1f63a9560caff9058912ddvandwalle * - if it is a "connect", remember which network were there at the point of the connect, so 311ecd2b88214b5d214fd1f63a9560caff9058912ddvandwalle * as those networks get a relative lower score than the selected configuration 31262f1d0ca8ea4466628f6ff179b1f20e1279fa7e0vandwalle * 313ecd2b88214b5d214fd1f63a9560caff9058912ddvandwalle * @param netId 314ecd2b88214b5d214fd1f63a9560caff9058912ddvandwalle * @param userTriggered : if the update come from WiFiManager 315ecd2b88214b5d214fd1f63a9560caff9058912ddvandwalle * @param connect : if the update includes a connect 316931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle */ 31762f1d0ca8ea4466628f6ff179b1f20e1279fa7e0vandwalle public void updateConfigurationHistory(int netId, boolean userTriggered, boolean connect) { 318f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle WifiConfiguration selected = mWifiConfigStore.getWifiConfiguration(netId); 319f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle if (selected == null) { 320f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle return; 321f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 322f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 323e86c962bb99a8b126ed64ddcc6b112161549e26dvandwalle if (selected.SSID == null) { 324e86c962bb99a8b126ed64ddcc6b112161549e26dvandwalle return; 325e86c962bb99a8b126ed64ddcc6b112161549e26dvandwalle } 326e86c962bb99a8b126ed64ddcc6b112161549e26dvandwalle 32762f1d0ca8ea4466628f6ff179b1f20e1279fa7e0vandwalle if (userTriggered) { 328931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle // Reenable autojoin for this network, 32962f1d0ca8ea4466628f6ff179b1f20e1279fa7e0vandwalle // since the user want to connect to this configuration 33027355a942653264388e909a4276196ee63e57811vandwalle selected.setAutoJoinStatus(WifiConfiguration.AUTO_JOIN_ENABLED); 33162f1d0ca8ea4466628f6ff179b1f20e1279fa7e0vandwalle selected.selfAdded = false; 33262f1d0ca8ea4466628f6ff179b1f20e1279fa7e0vandwalle } 333f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 334992ae00f25a9cc22cf5db3261bd7e72927069cf7vandwalle if (DBG && userTriggered) { 335f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle if (selected.connectChoices != null) { 336ecd2b88214b5d214fd1f63a9560caff9058912ddvandwalle logDbg("updateConfigurationHistory will update " 337f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle + Integer.toString(netId) + " now: " 338992ae00f25a9cc22cf5db3261bd7e72927069cf7vandwalle + Integer.toString(selected.connectChoices.size()) 339992ae00f25a9cc22cf5db3261bd7e72927069cf7vandwalle + " uid=" + Integer.toString(selected.creatorUid), true); 340f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } else { 341ecd2b88214b5d214fd1f63a9560caff9058912ddvandwalle logDbg("updateConfigurationHistory will update " 342992ae00f25a9cc22cf5db3261bd7e72927069cf7vandwalle + Integer.toString(netId) 343992ae00f25a9cc22cf5db3261bd7e72927069cf7vandwalle + " uid=" + Integer.toString(selected.creatorUid), true); 344f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 345f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 346f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 347ecd2b88214b5d214fd1f63a9560caff9058912ddvandwalle if (connect && userTriggered) { 348ecd2b88214b5d214fd1f63a9560caff9058912ddvandwalle boolean found = false; 3492451dbcc4f9641df188326215b204b798eb70c46vandwalle int choice = 0; 35062f1d0ca8ea4466628f6ff179b1f20e1279fa7e0vandwalle List<WifiConfiguration> networks = 35162f1d0ca8ea4466628f6ff179b1f20e1279fa7e0vandwalle mWifiConfigStore.getRecentConfiguredNetworks(12000, false); 35262f1d0ca8ea4466628f6ff179b1f20e1279fa7e0vandwalle if (networks != null) { 35362f1d0ca8ea4466628f6ff179b1f20e1279fa7e0vandwalle for (WifiConfiguration config : networks) { 354992ae00f25a9cc22cf5db3261bd7e72927069cf7vandwalle if (DBG) { 355992ae00f25a9cc22cf5db3261bd7e72927069cf7vandwalle logDbg("updateConfigurationHistory got " + config.SSID + " nid=" 356992ae00f25a9cc22cf5db3261bd7e72927069cf7vandwalle + Integer.toString(config.networkId)); 357992ae00f25a9cc22cf5db3261bd7e72927069cf7vandwalle } 358f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 35962f1d0ca8ea4466628f6ff179b1f20e1279fa7e0vandwalle if (selected.configKey(true).equals(config.configKey(true))) { 360ecd2b88214b5d214fd1f63a9560caff9058912ddvandwalle found = true; 36162f1d0ca8ea4466628f6ff179b1f20e1279fa7e0vandwalle continue; 36262f1d0ca8ea4466628f6ff179b1f20e1279fa7e0vandwalle } 363f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 3642451dbcc4f9641df188326215b204b798eb70c46vandwalle // Compare RSSI values so as to evaluate the strength of the user preference 3652451dbcc4f9641df188326215b204b798eb70c46vandwalle int order = compareWifiConfigurationsRSSI(config, selected, null); 3662451dbcc4f9641df188326215b204b798eb70c46vandwalle 3672451dbcc4f9641df188326215b204b798eb70c46vandwalle if (order < -30) { 3682451dbcc4f9641df188326215b204b798eb70c46vandwalle // Selected configuration is worse than the visible configuration 3692451dbcc4f9641df188326215b204b798eb70c46vandwalle // hence register a strong choice so as autojoin cannot override this 3702451dbcc4f9641df188326215b204b798eb70c46vandwalle // for instance, the user has select a network 3712451dbcc4f9641df188326215b204b798eb70c46vandwalle // with 1 bar over a network with 3 bars... 3722451dbcc4f9641df188326215b204b798eb70c46vandwalle choice = 60; 3732451dbcc4f9641df188326215b204b798eb70c46vandwalle } else if (order < -20) { 3742451dbcc4f9641df188326215b204b798eb70c46vandwalle choice = 50; 3752451dbcc4f9641df188326215b204b798eb70c46vandwalle } else if (order < -10) { 3762451dbcc4f9641df188326215b204b798eb70c46vandwalle choice = 40; 3772451dbcc4f9641df188326215b204b798eb70c46vandwalle } else if (order < 10) { 3782451dbcc4f9641df188326215b204b798eb70c46vandwalle // Selected configuration is about same or has a slightly better RSSI 3792451dbcc4f9641df188326215b204b798eb70c46vandwalle // hence register a weaker choice, here a difference of at least +/-30 in 3802451dbcc4f9641df188326215b204b798eb70c46vandwalle // RSSI comparison triggered by autoJoin will override the choice 3812451dbcc4f9641df188326215b204b798eb70c46vandwalle choice = 30; 3822451dbcc4f9641df188326215b204b798eb70c46vandwalle } else if (order <= 30) { 3832451dbcc4f9641df188326215b204b798eb70c46vandwalle // Selected configuration is better than the visible configuration 3842451dbcc4f9641df188326215b204b798eb70c46vandwalle // hence we do not know if the user prefers this configuration strongly 3852451dbcc4f9641df188326215b204b798eb70c46vandwalle choice = 20; 3862451dbcc4f9641df188326215b204b798eb70c46vandwalle } else { 3872451dbcc4f9641df188326215b204b798eb70c46vandwalle choice = 10; 38862f1d0ca8ea4466628f6ff179b1f20e1279fa7e0vandwalle } 389f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 390931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle // The selected configuration was preferred over a recently seen config 391931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle // hence remember the user's choice: 392931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle // add the recently seen config to the selected's connectChoices array 393ecd2b88214b5d214fd1f63a9560caff9058912ddvandwalle 394ecd2b88214b5d214fd1f63a9560caff9058912ddvandwalle if (selected.connectChoices == null) { 395ecd2b88214b5d214fd1f63a9560caff9058912ddvandwalle selected.connectChoices = new HashMap<String, Integer>(); 396ecd2b88214b5d214fd1f63a9560caff9058912ddvandwalle } 397ecd2b88214b5d214fd1f63a9560caff9058912ddvandwalle 398ecd2b88214b5d214fd1f63a9560caff9058912ddvandwalle logDbg("updateConfigurationHistory add a choice " + selected.configKey(true) 3990888ce6f90bdaeee799dd8361ea4781e23a33b87vandwalle + " over " + config.configKey(true) 4002451dbcc4f9641df188326215b204b798eb70c46vandwalle + " choice " + Integer.toString(choice)); 401cf5b8eb8a08c45bd4a82f1f4bb789c8a1b08744fvandwalle 4022451dbcc4f9641df188326215b204b798eb70c46vandwalle Integer currentChoice = selected.connectChoices.get(config.configKey(true)); 4032451dbcc4f9641df188326215b204b798eb70c46vandwalle if (currentChoice == null || currentChoice.intValue() < choice) { 4042451dbcc4f9641df188326215b204b798eb70c46vandwalle // Add the visible config to the selected's connect choice list 4052451dbcc4f9641df188326215b204b798eb70c46vandwalle selected.connectChoices.put(config.configKey(true), choice); 4062451dbcc4f9641df188326215b204b798eb70c46vandwalle } 407f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 40862f1d0ca8ea4466628f6ff179b1f20e1279fa7e0vandwalle if (config.connectChoices != null) { 409ecd2b88214b5d214fd1f63a9560caff9058912ddvandwalle if (VDBG) { 410ecd2b88214b5d214fd1f63a9560caff9058912ddvandwalle logDbg("updateConfigurationHistory will remove " 41162f1d0ca8ea4466628f6ff179b1f20e1279fa7e0vandwalle + selected.configKey(true) + " from " + config.configKey(true)); 412ecd2b88214b5d214fd1f63a9560caff9058912ddvandwalle } 413931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle // Remove the selected from the recently seen config's connectChoice list 41462f1d0ca8ea4466628f6ff179b1f20e1279fa7e0vandwalle config.connectChoices.remove(selected.configKey(true)); 4150888ce6f90bdaeee799dd8361ea4781e23a33b87vandwalle 4160888ce6f90bdaeee799dd8361ea4781e23a33b87vandwalle if (selected.linkedConfigurations != null) { 417931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle // Remove the selected's linked configuration from the 418931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle // recently seen config's connectChoice list 4190888ce6f90bdaeee799dd8361ea4781e23a33b87vandwalle for (String key : selected.linkedConfigurations.keySet()) { 4200888ce6f90bdaeee799dd8361ea4781e23a33b87vandwalle config.connectChoices.remove(key); 4210888ce6f90bdaeee799dd8361ea4781e23a33b87vandwalle } 4220888ce6f90bdaeee799dd8361ea4781e23a33b87vandwalle } 42362f1d0ca8ea4466628f6ff179b1f20e1279fa7e0vandwalle } 424ecd2b88214b5d214fd1f63a9560caff9058912ddvandwalle } 425ecd2b88214b5d214fd1f63a9560caff9058912ddvandwalle if (found == false) { 4262451dbcc4f9641df188326215b204b798eb70c46vandwalle // We haven't found the configuration that the user just selected in our 4272451dbcc4f9641df188326215b204b798eb70c46vandwalle // scan cache. 4282451dbcc4f9641df188326215b204b798eb70c46vandwalle // In that case we will need a new scan before attempting to connect to this 4292451dbcc4f9641df188326215b204b798eb70c46vandwalle // configuration anyhow and thus we can process the scan results then. 430ecd2b88214b5d214fd1f63a9560caff9058912ddvandwalle logDbg("updateConfigurationHistory try to connect to an old network!! : " 431ecd2b88214b5d214fd1f63a9560caff9058912ddvandwalle + selected.configKey()); 43262f1d0ca8ea4466628f6ff179b1f20e1279fa7e0vandwalle } 433f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 43462f1d0ca8ea4466628f6ff179b1f20e1279fa7e0vandwalle if (selected.connectChoices != null) { 43562f1d0ca8ea4466628f6ff179b1f20e1279fa7e0vandwalle if (VDBG) 436ecd2b88214b5d214fd1f63a9560caff9058912ddvandwalle logDbg("updateConfigurationHistory " + Integer.toString(netId) 43762f1d0ca8ea4466628f6ff179b1f20e1279fa7e0vandwalle + " now: " + Integer.toString(selected.connectChoices.size())); 43862f1d0ca8ea4466628f6ff179b1f20e1279fa7e0vandwalle } 439f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 440f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 441992ae00f25a9cc22cf5db3261bd7e72927069cf7vandwalle 442931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle // TODO: write only if something changed 443992ae00f25a9cc22cf5db3261bd7e72927069cf7vandwalle if (userTriggered || connect) { 444992ae00f25a9cc22cf5db3261bd7e72927069cf7vandwalle mWifiConfigStore.writeKnownNetworkHistory(); 445992ae00f25a9cc22cf5db3261bd7e72927069cf7vandwalle } 446f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 447f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 4482451dbcc4f9641df188326215b204b798eb70c46vandwalle int getConnectChoice(WifiConfiguration source, WifiConfiguration target) { 4492451dbcc4f9641df188326215b204b798eb70c46vandwalle Integer choice = null; 4502451dbcc4f9641df188326215b204b798eb70c46vandwalle if (source == null || target == null) { 4512451dbcc4f9641df188326215b204b798eb70c46vandwalle return 0; 452f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 453f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 4542451dbcc4f9641df188326215b204b798eb70c46vandwalle if (source.connectChoices != null 4552451dbcc4f9641df188326215b204b798eb70c46vandwalle && source.connectChoices.containsKey(target.configKey(true))) { 4562451dbcc4f9641df188326215b204b798eb70c46vandwalle choice = source.connectChoices.get(target.configKey(true)); 4572451dbcc4f9641df188326215b204b798eb70c46vandwalle } else if (source.linkedConfigurations != null) { 458f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle for (String key : source.linkedConfigurations.keySet()) { 459f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle WifiConfiguration config = mWifiConfigStore.getWifiConfiguration(key); 460f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle if (config != null) { 461f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle if (config.connectChoices != null) { 4622451dbcc4f9641df188326215b204b798eb70c46vandwalle choice = config.connectChoices.get(target.configKey(true)); 463f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 464f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 465f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 4662451dbcc4f9641df188326215b204b798eb70c46vandwalle } 4672451dbcc4f9641df188326215b204b798eb70c46vandwalle 4682451dbcc4f9641df188326215b204b798eb70c46vandwalle if (choice == null) { 4692451dbcc4f9641df188326215b204b798eb70c46vandwalle //We didn't find the connect choice 4702451dbcc4f9641df188326215b204b798eb70c46vandwalle return 0; 4712451dbcc4f9641df188326215b204b798eb70c46vandwalle } else { 4722451dbcc4f9641df188326215b204b798eb70c46vandwalle if (choice.intValue() < 0) { 4732451dbcc4f9641df188326215b204b798eb70c46vandwalle choice = 20; // Compatibility with older files 4742451dbcc4f9641df188326215b204b798eb70c46vandwalle } 4752451dbcc4f9641df188326215b204b798eb70c46vandwalle return choice.intValue(); 4762451dbcc4f9641df188326215b204b798eb70c46vandwalle } 4772451dbcc4f9641df188326215b204b798eb70c46vandwalle } 4782451dbcc4f9641df188326215b204b798eb70c46vandwalle 4792451dbcc4f9641df188326215b204b798eb70c46vandwalle 4802451dbcc4f9641df188326215b204b798eb70c46vandwalle int getScoreFromVisibility(WifiConfiguration.Visibility visibility, int rssiBoost) { 4812451dbcc4f9641df188326215b204b798eb70c46vandwalle int rssiBoost5 = 0; 4822451dbcc4f9641df188326215b204b798eb70c46vandwalle int score = 0; 4834dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle 4842451dbcc4f9641df188326215b204b798eb70c46vandwalle /** 4852451dbcc4f9641df188326215b204b798eb70c46vandwalle * Boost RSSI value of 5GHz bands iff the base value is better than threshold 4862451dbcc4f9641df188326215b204b798eb70c46vandwalle * This implements band preference where we prefer 5GHz if RSSI5 is good enough, whereas 4872451dbcc4f9641df188326215b204b798eb70c46vandwalle * we prefer 2.4GHz otherwise. 4882451dbcc4f9641df188326215b204b798eb70c46vandwalle * Note that 2.4GHz doesn't need a boost since at equal power the RSSI is typically 4892451dbcc4f9641df188326215b204b798eb70c46vandwalle * 6-10 dB higher 4902451dbcc4f9641df188326215b204b798eb70c46vandwalle */ 4912451dbcc4f9641df188326215b204b798eb70c46vandwalle if ((visibility.rssi5 + rssiBoost) > WifiConfiguration.A_BAND_PREFERENCE_RSSI_THRESHOLD) { 4922451dbcc4f9641df188326215b204b798eb70c46vandwalle rssiBoost5 = 25; 4932451dbcc4f9641df188326215b204b798eb70c46vandwalle } else if ((visibility.rssi5 + rssiBoost) 4942451dbcc4f9641df188326215b204b798eb70c46vandwalle > WifiConfiguration.A_BAND_PREFERENCE_RSSI_THRESHOLD_LOW) { 4952451dbcc4f9641df188326215b204b798eb70c46vandwalle rssiBoost5 = 15; 4962451dbcc4f9641df188326215b204b798eb70c46vandwalle } 4972451dbcc4f9641df188326215b204b798eb70c46vandwalle 4982451dbcc4f9641df188326215b204b798eb70c46vandwalle // Select which band to use so as to score a 4992451dbcc4f9641df188326215b204b798eb70c46vandwalle if (visibility.rssi5 + rssiBoost5 > visibility.rssi24) { 5002451dbcc4f9641df188326215b204b798eb70c46vandwalle // Prefer a's 5GHz 5012451dbcc4f9641df188326215b204b798eb70c46vandwalle score = visibility.rssi5 + rssiBoost5 + rssiBoost; 5022451dbcc4f9641df188326215b204b798eb70c46vandwalle } else { 5032451dbcc4f9641df188326215b204b798eb70c46vandwalle // Prefer a's 2.4GHz 5042451dbcc4f9641df188326215b204b798eb70c46vandwalle score = visibility.rssi24 + rssiBoost; 505f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 5062451dbcc4f9641df188326215b204b798eb70c46vandwalle 5072451dbcc4f9641df188326215b204b798eb70c46vandwalle return score; 508f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 509f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 5102451dbcc4f9641df188326215b204b798eb70c46vandwalle // Compare WifiConfiguration by RSSI, and return a comparison value in the range [-50, +50] 5112451dbcc4f9641df188326215b204b798eb70c46vandwalle // The result represents "approximately" an RSSI difference measured in dBM 5122451dbcc4f9641df188326215b204b798eb70c46vandwalle // Adjusted with various parameters: 5132451dbcc4f9641df188326215b204b798eb70c46vandwalle // +) current network gets a +15 boost 5142451dbcc4f9641df188326215b204b798eb70c46vandwalle // +) 5GHz signal, if they are strong enough, get a +15 or +25 boost, representing the 5152451dbcc4f9641df188326215b204b798eb70c46vandwalle // fact that at short range we prefer 5GHz band as it is cleaner of interference and 5162451dbcc4f9641df188326215b204b798eb70c46vandwalle // provides for wider channels 5172451dbcc4f9641df188326215b204b798eb70c46vandwalle int compareWifiConfigurationsRSSI(WifiConfiguration a, WifiConfiguration b, 5182451dbcc4f9641df188326215b204b798eb70c46vandwalle String currentConfiguration) { 519f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle int order = 0; 5202451dbcc4f9641df188326215b204b798eb70c46vandwalle 5212451dbcc4f9641df188326215b204b798eb70c46vandwalle // Boost used so as to favor current config 5222451dbcc4f9641df188326215b204b798eb70c46vandwalle int aRssiBoost = 0; 5232451dbcc4f9641df188326215b204b798eb70c46vandwalle int bRssiBoost = 0; 5242451dbcc4f9641df188326215b204b798eb70c46vandwalle 5252451dbcc4f9641df188326215b204b798eb70c46vandwalle int scoreA; 5262451dbcc4f9641df188326215b204b798eb70c46vandwalle int scoreB; 5272451dbcc4f9641df188326215b204b798eb70c46vandwalle 5282451dbcc4f9641df188326215b204b798eb70c46vandwalle // Retrieve the visibility 529f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle WifiConfiguration.Visibility astatus = a.visibility; 530f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle WifiConfiguration.Visibility bstatus = b.visibility; 531f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle if (astatus == null || bstatus == null) { 5322451dbcc4f9641df188326215b204b798eb70c46vandwalle // Error visibility wasn't set 533f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle logDbg("compareWifiConfigurations NULL band status!"); 534f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle return 0; 535f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 5362451dbcc4f9641df188326215b204b798eb70c46vandwalle 5372451dbcc4f9641df188326215b204b798eb70c46vandwalle // Apply Hysteresis, boost RSSI of current configuration 5382451dbcc4f9641df188326215b204b798eb70c46vandwalle if (null != currentConfiguration) { 5392451dbcc4f9641df188326215b204b798eb70c46vandwalle if (a.configKey().equals(currentConfiguration)) { 5402451dbcc4f9641df188326215b204b798eb70c46vandwalle aRssiBoost += 15; 5412451dbcc4f9641df188326215b204b798eb70c46vandwalle } else if (b.configKey().equals(currentConfiguration)) { 5422451dbcc4f9641df188326215b204b798eb70c46vandwalle bRssiBoost += 15; 5432451dbcc4f9641df188326215b204b798eb70c46vandwalle } 5442451dbcc4f9641df188326215b204b798eb70c46vandwalle } 5452451dbcc4f9641df188326215b204b798eb70c46vandwalle 5462451dbcc4f9641df188326215b204b798eb70c46vandwalle if (VDBG) { 5472451dbcc4f9641df188326215b204b798eb70c46vandwalle logDbg("compareWifiConfigurationsRSSI: " + a.configKey() 5482451dbcc4f9641df188326215b204b798eb70c46vandwalle + " " + Integer.toString(astatus.rssi5) 5492451dbcc4f9641df188326215b204b798eb70c46vandwalle + "," + Integer.toString(astatus.rssi24) + " " 5502451dbcc4f9641df188326215b204b798eb70c46vandwalle + " boost=" + Integer.toString(aRssiBoost) 5512451dbcc4f9641df188326215b204b798eb70c46vandwalle + b.configKey() + " " 5522451dbcc4f9641df188326215b204b798eb70c46vandwalle + Integer.toString(bstatus.rssi5) + "," 5532451dbcc4f9641df188326215b204b798eb70c46vandwalle + Integer.toString(bstatus.rssi24) 5542451dbcc4f9641df188326215b204b798eb70c46vandwalle + " boost=" + Integer.toString(bRssiBoost) 5552451dbcc4f9641df188326215b204b798eb70c46vandwalle ); 556f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 5572451dbcc4f9641df188326215b204b798eb70c46vandwalle 5582451dbcc4f9641df188326215b204b798eb70c46vandwalle scoreA = getScoreFromVisibility(astatus, aRssiBoost); 5592451dbcc4f9641df188326215b204b798eb70c46vandwalle scoreB = getScoreFromVisibility(bstatus, bRssiBoost); 5602451dbcc4f9641df188326215b204b798eb70c46vandwalle 5612451dbcc4f9641df188326215b204b798eb70c46vandwalle // Compare a and b 5622451dbcc4f9641df188326215b204b798eb70c46vandwalle // If a score is higher then a > b and the order is descending (negative) 5632451dbcc4f9641df188326215b204b798eb70c46vandwalle // If b score is higher then a < b and the order is ascending (positive) 5642451dbcc4f9641df188326215b204b798eb70c46vandwalle order = scoreB - scoreA; 5652451dbcc4f9641df188326215b204b798eb70c46vandwalle 5662451dbcc4f9641df188326215b204b798eb70c46vandwalle // Normalize the order to [-50, +50] 5672451dbcc4f9641df188326215b204b798eb70c46vandwalle if (order > 50) order = 50; 5682451dbcc4f9641df188326215b204b798eb70c46vandwalle else if (order < -50) order = -50; 5692451dbcc4f9641df188326215b204b798eb70c46vandwalle 5702451dbcc4f9641df188326215b204b798eb70c46vandwalle if (VDBG) { 5712451dbcc4f9641df188326215b204b798eb70c46vandwalle String prefer = " = "; 5722451dbcc4f9641df188326215b204b798eb70c46vandwalle if (order > 0) { 5732451dbcc4f9641df188326215b204b798eb70c46vandwalle prefer = " < "; // Ascending 5742451dbcc4f9641df188326215b204b798eb70c46vandwalle } else if (order < 0) { 5752451dbcc4f9641df188326215b204b798eb70c46vandwalle prefer = " > "; // Descending 5762451dbcc4f9641df188326215b204b798eb70c46vandwalle } 5772451dbcc4f9641df188326215b204b798eb70c46vandwalle logDbg("compareWifiConfigurationsRSSI " + a.configKey() 5782451dbcc4f9641df188326215b204b798eb70c46vandwalle + " rssi=(" + a.visibility.rssi24 5792451dbcc4f9641df188326215b204b798eb70c46vandwalle + "," + a.visibility.rssi5 5802451dbcc4f9641df188326215b204b798eb70c46vandwalle + ") num=(" + a.visibility.num24 5812451dbcc4f9641df188326215b204b798eb70c46vandwalle + "," + a.visibility.num5 + ")" 5822451dbcc4f9641df188326215b204b798eb70c46vandwalle + prefer + b.configKey() 5832451dbcc4f9641df188326215b204b798eb70c46vandwalle + " rssi=(" + b.visibility.rssi24 5842451dbcc4f9641df188326215b204b798eb70c46vandwalle + "," + b.visibility.rssi5 5852451dbcc4f9641df188326215b204b798eb70c46vandwalle + ") num=(" + b.visibility.num24 5862451dbcc4f9641df188326215b204b798eb70c46vandwalle + "," + b.visibility.num5 + ")" 5872451dbcc4f9641df188326215b204b798eb70c46vandwalle + " -> " + order); 5882451dbcc4f9641df188326215b204b798eb70c46vandwalle } 5892451dbcc4f9641df188326215b204b798eb70c46vandwalle 590f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle return order; 591f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 592f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 5934dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle 5942451dbcc4f9641df188326215b204b798eb70c46vandwalle int compareWifiConfigurationsWithScorer(WifiConfiguration a, WifiConfiguration b) { 5952451dbcc4f9641df188326215b204b798eb70c46vandwalle 5962451dbcc4f9641df188326215b204b798eb70c46vandwalle int aRssiBoost = 0; 5972451dbcc4f9641df188326215b204b798eb70c46vandwalle int bRssiBoost = 0; 5982451dbcc4f9641df188326215b204b798eb70c46vandwalle 5992451dbcc4f9641df188326215b204b798eb70c46vandwalle // Apply Hysteresis : boost RSSI of current configuration before 6002451dbcc4f9641df188326215b204b798eb70c46vandwalle // looking up the score 6012451dbcc4f9641df188326215b204b798eb70c46vandwalle if (null != mCurrentConfigurationKey) { 6022451dbcc4f9641df188326215b204b798eb70c46vandwalle if (a.configKey().equals(mCurrentConfigurationKey)) { 6032451dbcc4f9641df188326215b204b798eb70c46vandwalle aRssiBoost += 15; 6042451dbcc4f9641df188326215b204b798eb70c46vandwalle } else if (b.configKey().equals(mCurrentConfigurationKey)) { 6052451dbcc4f9641df188326215b204b798eb70c46vandwalle bRssiBoost += 15; 6062451dbcc4f9641df188326215b204b798eb70c46vandwalle } 6072451dbcc4f9641df188326215b204b798eb70c46vandwalle } 6082451dbcc4f9641df188326215b204b798eb70c46vandwalle int scoreA = getConfigNetworkScore(a, 3000, aRssiBoost); 6092451dbcc4f9641df188326215b204b798eb70c46vandwalle int scoreB = getConfigNetworkScore(a, 3000, bRssiBoost); 6102451dbcc4f9641df188326215b204b798eb70c46vandwalle 6112451dbcc4f9641df188326215b204b798eb70c46vandwalle // Both configurations need to have a score for the scorer to be used 6122451dbcc4f9641df188326215b204b798eb70c46vandwalle // ...and the scores need to be different:-) 6132451dbcc4f9641df188326215b204b798eb70c46vandwalle if (scoreA == WifiNetworkScoreCache.INVALID_NETWORK_SCORE 6142451dbcc4f9641df188326215b204b798eb70c46vandwalle || scoreB == WifiNetworkScoreCache.INVALID_NETWORK_SCORE) { 6152451dbcc4f9641df188326215b204b798eb70c46vandwalle return 0; 6162451dbcc4f9641df188326215b204b798eb70c46vandwalle } 6172451dbcc4f9641df188326215b204b798eb70c46vandwalle 6182451dbcc4f9641df188326215b204b798eb70c46vandwalle if (VDBG) { 6192451dbcc4f9641df188326215b204b798eb70c46vandwalle String prefer = " = "; 6202451dbcc4f9641df188326215b204b798eb70c46vandwalle if (scoreA < scoreB) { 6212451dbcc4f9641df188326215b204b798eb70c46vandwalle prefer = " < "; 6222451dbcc4f9641df188326215b204b798eb70c46vandwalle } if (scoreA > scoreB) { 6232451dbcc4f9641df188326215b204b798eb70c46vandwalle prefer = " > "; 6242451dbcc4f9641df188326215b204b798eb70c46vandwalle } 6252451dbcc4f9641df188326215b204b798eb70c46vandwalle logDbg("compareWifiConfigurationsWithScorer " + a.configKey() 6262451dbcc4f9641df188326215b204b798eb70c46vandwalle + " rssi=(" + a.visibility.rssi24 6272451dbcc4f9641df188326215b204b798eb70c46vandwalle + "," + a.visibility.rssi5 6282451dbcc4f9641df188326215b204b798eb70c46vandwalle + ") num=(" + a.visibility.num24 6292451dbcc4f9641df188326215b204b798eb70c46vandwalle + "," + a.visibility.num5 + ")" 6302451dbcc4f9641df188326215b204b798eb70c46vandwalle + prefer + b.configKey() 6312451dbcc4f9641df188326215b204b798eb70c46vandwalle + " rssi=(" + b.visibility.rssi24 6322451dbcc4f9641df188326215b204b798eb70c46vandwalle + "," + b.visibility.rssi5 6332451dbcc4f9641df188326215b204b798eb70c46vandwalle + ") num=(" + b.visibility.num24 6342451dbcc4f9641df188326215b204b798eb70c46vandwalle + "," + b.visibility.num5 + ")" 6352451dbcc4f9641df188326215b204b798eb70c46vandwalle + " -> " + Integer.toString(scoreB - scoreA)); 6362451dbcc4f9641df188326215b204b798eb70c46vandwalle } 6372451dbcc4f9641df188326215b204b798eb70c46vandwalle // If scoreA > scoreB, the comparison is descending hence the return value is negative 6382451dbcc4f9641df188326215b204b798eb70c46vandwalle return scoreB - scoreA; 6392451dbcc4f9641df188326215b204b798eb70c46vandwalle } 6402451dbcc4f9641df188326215b204b798eb70c46vandwalle 641f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle int compareWifiConfigurations(WifiConfiguration a, WifiConfiguration b) { 642f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle int order = 0; 643117be607246604e875de62aa8cdd99700b77a2b4vandwalle String lastSelectedConfiguration = mWifiConfigStore.getLastSelectedConfiguration(); 644f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle boolean linked = false; 645f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 646453aee50caf7e332e77ab3d995d7c87a958e4fd4vandwalle if ((a.linkedConfigurations != null) && (b.linkedConfigurations != null) 647453aee50caf7e332e77ab3d995d7c87a958e4fd4vandwalle && (a.autoJoinStatus == WifiConfiguration.AUTO_JOIN_ENABLED) 648453aee50caf7e332e77ab3d995d7c87a958e4fd4vandwalle && (b.autoJoinStatus == WifiConfiguration.AUTO_JOIN_ENABLED)) { 6492451dbcc4f9641df188326215b204b798eb70c46vandwalle if ((a.linkedConfigurations.get(b.configKey(true)) != null) 6502451dbcc4f9641df188326215b204b798eb70c46vandwalle && (b.linkedConfigurations.get(a.configKey(true)) != null)) { 651f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle linked = true; 652f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 653f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 654f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 655f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle if (a.ephemeral && b.ephemeral == false) { 656f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle if (VDBG) { 657453aee50caf7e332e77ab3d995d7c87a958e4fd4vandwalle logDbg("compareWifiConfigurations ephemeral and prefers " + b.configKey() 658453aee50caf7e332e77ab3d995d7c87a958e4fd4vandwalle + " over " + a.configKey()); 659f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 660931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle return 1; // b is of higher priority - ascending 661f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 662f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle if (b.ephemeral && a.ephemeral == false) { 663f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle if (VDBG) { 6642451dbcc4f9641df188326215b204b798eb70c46vandwalle logDbg("compareWifiConfigurations ephemeral and prefers " + a.configKey() 665453aee50caf7e332e77ab3d995d7c87a958e4fd4vandwalle + " over " + b.configKey()); 666f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 667931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle return -1; // a is of higher priority - descending 668f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 669f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 6702451dbcc4f9641df188326215b204b798eb70c46vandwalle // Apply RSSI, in the range [-5, +5] 6712451dbcc4f9641df188326215b204b798eb70c46vandwalle // after band adjustment, +n difference roughly corresponds to +10xn dBm 6722451dbcc4f9641df188326215b204b798eb70c46vandwalle order = order + compareWifiConfigurationsRSSI(a, b, mCurrentConfigurationKey); 673f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 6742451dbcc4f9641df188326215b204b798eb70c46vandwalle // If the configurations are not linked, compare by user's choice, only a 6752451dbcc4f9641df188326215b204b798eb70c46vandwalle // very high RSSI difference can then override the choice 6762451dbcc4f9641df188326215b204b798eb70c46vandwalle if (!linked) { 6772451dbcc4f9641df188326215b204b798eb70c46vandwalle int choice; 678f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 6792451dbcc4f9641df188326215b204b798eb70c46vandwalle choice = getConnectChoice(a, b); 6802451dbcc4f9641df188326215b204b798eb70c46vandwalle if (choice > 0) { 681931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle // a is of higher priority - descending 6822451dbcc4f9641df188326215b204b798eb70c46vandwalle order = order - choice; 683f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle if (VDBG) { 6842451dbcc4f9641df188326215b204b798eb70c46vandwalle logDbg("compareWifiConfigurations prefers " + a.configKey() 685453aee50caf7e332e77ab3d995d7c87a958e4fd4vandwalle + " over " + b.configKey() 6862451dbcc4f9641df188326215b204b798eb70c46vandwalle + " due to user choice order -> " + Integer.toString(order)); 687f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 6882451dbcc4f9641df188326215b204b798eb70c46vandwalle } 6892451dbcc4f9641df188326215b204b798eb70c46vandwalle 6902451dbcc4f9641df188326215b204b798eb70c46vandwalle choice = getConnectChoice(b, a); 6912451dbcc4f9641df188326215b204b798eb70c46vandwalle if (choice > 0) { 692931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle // a is of lower priority - ascending 6932451dbcc4f9641df188326215b204b798eb70c46vandwalle order = order + choice; 6944dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle if (VDBG) { 6952451dbcc4f9641df188326215b204b798eb70c46vandwalle logDbg("compareWifiConfigurations prefers " + b.configKey() + " over " 6962451dbcc4f9641df188326215b204b798eb70c46vandwalle + a.configKey() + " due to user choice order ->" 6972451dbcc4f9641df188326215b204b798eb70c46vandwalle + Integer.toString(order)); 698f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 699f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 700f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 701ede1310be531a84faa08f02c3fd243448dd936ddvandwalle 702f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle if (order == 0) { 703931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle // We don't know anything - pick the last seen i.e. K behavior 704931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle // we should do this only for recently picked configurations 705f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle if (a.priority > b.priority) { 706931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle // a is of higher priority - descending 7072451dbcc4f9641df188326215b204b798eb70c46vandwalle if (VDBG) { 708453aee50caf7e332e77ab3d995d7c87a958e4fd4vandwalle logDbg("compareWifiConfigurations prefers -1 " + a.configKey() + " over " 709453aee50caf7e332e77ab3d995d7c87a958e4fd4vandwalle + b.configKey() + " due to priority"); 710f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 711f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 712f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle order = -1; 713f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } else if (a.priority < b.priority) { 714931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle // a is of lower priority - ascending 7152451dbcc4f9641df188326215b204b798eb70c46vandwalle if (VDBG) { 716453aee50caf7e332e77ab3d995d7c87a958e4fd4vandwalle logDbg("compareWifiConfigurations prefers +1 " + b.configKey() + " over " 717453aee50caf7e332e77ab3d995d7c87a958e4fd4vandwalle + a.configKey() + " due to priority"); 718f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 7192451dbcc4f9641df188326215b204b798eb70c46vandwalle order = 1; 720f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 721f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 722f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 723f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle String sorder = " == "; 724931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle if (order > 0) { 725f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle sorder = " < "; 726931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle } else if (order < 0) { 727f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle sorder = " > "; 728931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle } 729f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 7302451dbcc4f9641df188326215b204b798eb70c46vandwalle if (VDBG) { 731453aee50caf7e332e77ab3d995d7c87a958e4fd4vandwalle logDbg("compareWifiConfigurations Done: " + a.configKey() + sorder 732453aee50caf7e332e77ab3d995d7c87a958e4fd4vandwalle + b.configKey() + " order " + Integer.toString(order)); 733f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 734f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 735f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle return order; 736f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 737f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 738931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle /** 739931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle * attemptRoam function implements the core of the same SSID switching algorithm 740931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle */ 741b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle ScanResult attemptRoam(WifiConfiguration current, int age) { 7424dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle ScanResult a = null; 743b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle if (current == null) { 744b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle if (VDBG) { 745b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle logDbg("attemptRoam not associated"); 746b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle } 7474dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle return null; 7484dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle } 749b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle if (current.scanResultCache == null) { 750b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle if (VDBG) { 751b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle logDbg("attemptRoam no scan cache"); 752b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle } 7534dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle return null; 7544dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle } 755b07da189850a4bfa268f8ab9be7867935eb2ecb5vandwalle if (current.scanResultCache.size() > 6) { 756b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle if (VDBG) { 757c6f06c628ee3583b60ff31a7da442e0ac7b26d97vandwalle logDbg("attemptRoam scan cache size " 758c6f06c628ee3583b60ff31a7da442e0ac7b26d97vandwalle + current.scanResultCache.size() + " --> bail"); 759b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle } 760931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle // Implement same SSID roaming only for configurations 761c6f06c628ee3583b60ff31a7da442e0ac7b26d97vandwalle // that have less than 4 BSSIDs 7624dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle return null; 7634dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle } 764b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle String currentBSSID = mWifiStateMachine.getCurrentBSSID(); 765b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle if (currentBSSID == null) { 766b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle if (DBG) { 767b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle logDbg("attemptRoam currentBSSID unknown"); 768b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle } 769b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle return null; 770b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle } 771b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle 772b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle if (current.bssidOwnerUid!= 0 && current.bssidOwnerUid != Process.WIFI_UID) { 773b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle if (DBG) { 774c6f06c628ee3583b60ff31a7da442e0ac7b26d97vandwalle logDbg("attemptRoam BSSID owner is " 775c6f06c628ee3583b60ff31a7da442e0ac7b26d97vandwalle + Long.toString(current.bssidOwnerUid) + " -> bail"); 776b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle } 7774dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle return null; 7784dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle } 7794dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle 780931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle // Determine which BSSID we want to associate to, taking account 781c6f06c628ee3583b60ff31a7da442e0ac7b26d97vandwalle // relative strength of 5 and 2.4 GHz BSSIDs 7822451dbcc4f9641df188326215b204b798eb70c46vandwalle long nowMs = System.currentTimeMillis(); 7834dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle int bRssiBoost5 = 0; 7844dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle int aRssiBoost5 = 0; 7854dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle int bRssiBoost = 0; 7864dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle int aRssiBoost = 0; 787b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle for (ScanResult b : current.scanResultCache.values()) { 7884dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle 789931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle if ((b.seen == 0) || (b.BSSID == null) 7902451dbcc4f9641df188326215b204b798eb70c46vandwalle || (nowMs - b.seen) > age ) { 7912451dbcc4f9641df188326215b204b798eb70c46vandwalle // TODO: do not apply blacklisting right now so as to leave this 7922451dbcc4f9641df188326215b204b798eb70c46vandwalle // bug as apparent 7932451dbcc4f9641df188326215b204b798eb70c46vandwalle // https://b2.corp.google.com/#/issues/16504012 7942451dbcc4f9641df188326215b204b798eb70c46vandwalle // || b.status != ScanResult.ENABLED) { 7954dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle continue; 7963a2a3d226881cce8a4e511302231d843b0def303vandwalle } 7974dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle 798931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle // Pick first one 7994dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle if (a == null) { 8004dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle a = b; 8014dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle continue; 8024dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle } 8034dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle 8042451dbcc4f9641df188326215b204b798eb70c46vandwalle // Apply hysteresis: we favor the currentBSSID by giving it a boost 805b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle if (currentBSSID.equals(b.BSSID)) { 806931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle // Reduce the benefit of hysteresis if RSSI <= -75 807c6f06c628ee3583b60ff31a7da442e0ac7b26d97vandwalle if (b.level <= WifiConfiguration.G_BAND_PREFERENCE_RSSI_THRESHOLD) { 808c6f06c628ee3583b60ff31a7da442e0ac7b26d97vandwalle bRssiBoost = +6; 809c6f06c628ee3583b60ff31a7da442e0ac7b26d97vandwalle } else { 810c6f06c628ee3583b60ff31a7da442e0ac7b26d97vandwalle bRssiBoost = +10; 811c6f06c628ee3583b60ff31a7da442e0ac7b26d97vandwalle } 8124dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle } 813b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle if (currentBSSID.equals(a.BSSID)) { 814c6f06c628ee3583b60ff31a7da442e0ac7b26d97vandwalle if (a.level <= WifiConfiguration.G_BAND_PREFERENCE_RSSI_THRESHOLD) { 815931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle // Reduce the benefit of hysteresis if RSSI <= -75 816c6f06c628ee3583b60ff31a7da442e0ac7b26d97vandwalle aRssiBoost = +6; 817c6f06c628ee3583b60ff31a7da442e0ac7b26d97vandwalle } else { 818c6f06c628ee3583b60ff31a7da442e0ac7b26d97vandwalle aRssiBoost = +10; 819c6f06c628ee3583b60ff31a7da442e0ac7b26d97vandwalle } 8204dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle } 8212451dbcc4f9641df188326215b204b798eb70c46vandwalle 8222451dbcc4f9641df188326215b204b798eb70c46vandwalle // Favor 5GHz: give a boost to 5GHz BSSIDs 8232451dbcc4f9641df188326215b204b798eb70c46vandwalle // Boost the BSSID if it is on 5GHz, above a threshold 8242451dbcc4f9641df188326215b204b798eb70c46vandwalle // But penalize it if it is on 5GHz and below threshold 825c6f06c628ee3583b60ff31a7da442e0ac7b26d97vandwalle if (b.is5GHz() && (b.level+bRssiBoost) 826c6f06c628ee3583b60ff31a7da442e0ac7b26d97vandwalle > WifiConfiguration.A_BAND_PREFERENCE_RSSI_THRESHOLD) { 8274dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle bRssiBoost5 = 25; 828c6f06c628ee3583b60ff31a7da442e0ac7b26d97vandwalle } else if (b.is5GHz() && (b.level+bRssiBoost) 829c6f06c628ee3583b60ff31a7da442e0ac7b26d97vandwalle < WifiConfiguration.G_BAND_PREFERENCE_RSSI_THRESHOLD) { 830c6f06c628ee3583b60ff31a7da442e0ac7b26d97vandwalle bRssiBoost5 = -10; 8314dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle } 832c6f06c628ee3583b60ff31a7da442e0ac7b26d97vandwalle if (a.is5GHz() && (a.level+aRssiBoost) 833c6f06c628ee3583b60ff31a7da442e0ac7b26d97vandwalle > WifiConfiguration.A_BAND_PREFERENCE_RSSI_THRESHOLD) { 8344dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle aRssiBoost5 = 25; 835c6f06c628ee3583b60ff31a7da442e0ac7b26d97vandwalle } else if (a.is5GHz() && (a.level+aRssiBoost) 836c6f06c628ee3583b60ff31a7da442e0ac7b26d97vandwalle < WifiConfiguration.G_BAND_PREFERENCE_RSSI_THRESHOLD) { 837c6f06c628ee3583b60ff31a7da442e0ac7b26d97vandwalle aRssiBoost5 = -10; 8384dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle } 8394dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle 8404dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle if (VDBG) { 841c6f06c628ee3583b60ff31a7da442e0ac7b26d97vandwalle String comp = " < "; 842c6f06c628ee3583b60ff31a7da442e0ac7b26d97vandwalle if (b.level + bRssiBoost + bRssiBoost5 > a.level +aRssiBoost + aRssiBoost5) { 843c6f06c628ee3583b60ff31a7da442e0ac7b26d97vandwalle comp = " > "; 844c6f06c628ee3583b60ff31a7da442e0ac7b26d97vandwalle } 8454dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle logDbg("attemptRoam: " 846c6f06c628ee3583b60ff31a7da442e0ac7b26d97vandwalle + b.BSSID + " rssi=" + b.level + " boost=" + Integer.toString(bRssiBoost) 847c6f06c628ee3583b60ff31a7da442e0ac7b26d97vandwalle + "/" + Integer.toString(bRssiBoost5) + " freq=" + b.frequency + comp 848c6f06c628ee3583b60ff31a7da442e0ac7b26d97vandwalle + a.BSSID + " rssi=" + a.level + " boost=" + Integer.toString(aRssiBoost) 849c6f06c628ee3583b60ff31a7da442e0ac7b26d97vandwalle + "/" + Integer.toString(aRssiBoost5) + " freq=" + a.frequency); 850c6f06c628ee3583b60ff31a7da442e0ac7b26d97vandwalle } 851c6f06c628ee3583b60ff31a7da442e0ac7b26d97vandwalle 8522451dbcc4f9641df188326215b204b798eb70c46vandwalle // Compare the RSSIs after applying the hysteresis boost and the 5GHz 8532451dbcc4f9641df188326215b204b798eb70c46vandwalle // boost if applicable 854c6f06c628ee3583b60ff31a7da442e0ac7b26d97vandwalle if (b.level + bRssiBoost + bRssiBoost5 > a.level +aRssiBoost + aRssiBoost5) { 855931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle // b is the better BSSID 856c6f06c628ee3583b60ff31a7da442e0ac7b26d97vandwalle a = b; 8574dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle } 8584dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle } 8593a2a3d226881cce8a4e511302231d843b0def303vandwalle if (a != null) { 8603a2a3d226881cce8a4e511302231d843b0def303vandwalle if (VDBG) { 8613a2a3d226881cce8a4e511302231d843b0def303vandwalle logDbg("attemptRoam: Found " 8623a2a3d226881cce8a4e511302231d843b0def303vandwalle + a.BSSID + " rssi=" + a.level + " freq=" + a.frequency 8633a2a3d226881cce8a4e511302231d843b0def303vandwalle + " Current: " + currentBSSID); 8643a2a3d226881cce8a4e511302231d843b0def303vandwalle } 8653a2a3d226881cce8a4e511302231d843b0def303vandwalle if (currentBSSID.equals(a.BSSID)) { 8663a2a3d226881cce8a4e511302231d843b0def303vandwalle return null; 8673a2a3d226881cce8a4e511302231d843b0def303vandwalle } 8684dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle } 8693a2a3d226881cce8a4e511302231d843b0def303vandwalle return a; 8704dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle } 8714dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle 872931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle /** 8732451dbcc4f9641df188326215b204b798eb70c46vandwalle * getNetworkScore() 8742451dbcc4f9641df188326215b204b798eb70c46vandwalle * 8752451dbcc4f9641df188326215b204b798eb70c46vandwalle * if scorer is present, get the network score of a WifiConfiguration 8762451dbcc4f9641df188326215b204b798eb70c46vandwalle * 8772451dbcc4f9641df188326215b204b798eb70c46vandwalle * Note: this should be merge with setVisibility 8782451dbcc4f9641df188326215b204b798eb70c46vandwalle * 8792451dbcc4f9641df188326215b204b798eb70c46vandwalle * @param config 8802451dbcc4f9641df188326215b204b798eb70c46vandwalle * @return score 8812451dbcc4f9641df188326215b204b798eb70c46vandwalle */ 8822451dbcc4f9641df188326215b204b798eb70c46vandwalle int getConfigNetworkScore(WifiConfiguration config, int age, int rssiBoost) { 8832451dbcc4f9641df188326215b204b798eb70c46vandwalle 8842451dbcc4f9641df188326215b204b798eb70c46vandwalle int score = WifiNetworkScoreCache.INVALID_NETWORK_SCORE; 8852451dbcc4f9641df188326215b204b798eb70c46vandwalle if (mNetworkScoreCache == null) { 8862451dbcc4f9641df188326215b204b798eb70c46vandwalle return score; 8872451dbcc4f9641df188326215b204b798eb70c46vandwalle } 8882451dbcc4f9641df188326215b204b798eb70c46vandwalle 8892451dbcc4f9641df188326215b204b798eb70c46vandwalle // Get current date 8902451dbcc4f9641df188326215b204b798eb70c46vandwalle long nowMs = System.currentTimeMillis(); 8912451dbcc4f9641df188326215b204b798eb70c46vandwalle 8922451dbcc4f9641df188326215b204b798eb70c46vandwalle // Run thru all cached scan results 8932451dbcc4f9641df188326215b204b798eb70c46vandwalle for (ScanResult result : scanResultCache.values()) { 8942451dbcc4f9641df188326215b204b798eb70c46vandwalle if ((nowMs - result.seen) < age) { 8952451dbcc4f9641df188326215b204b798eb70c46vandwalle int sc = mNetworkScoreCache.getNetworkScore(result, rssiBoost); 8962451dbcc4f9641df188326215b204b798eb70c46vandwalle if (sc > score) { 8972451dbcc4f9641df188326215b204b798eb70c46vandwalle score = sc; 8982451dbcc4f9641df188326215b204b798eb70c46vandwalle } 8992451dbcc4f9641df188326215b204b798eb70c46vandwalle } 9002451dbcc4f9641df188326215b204b798eb70c46vandwalle } 9012451dbcc4f9641df188326215b204b798eb70c46vandwalle return score; 9022451dbcc4f9641df188326215b204b798eb70c46vandwalle } 9032451dbcc4f9641df188326215b204b798eb70c46vandwalle 9042451dbcc4f9641df188326215b204b798eb70c46vandwalle /** 905931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle * attemptAutoJoin() function implements the core of the a network switching algorithm 906931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle */ 907f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle void attemptAutoJoin() { 9082451dbcc4f9641df188326215b204b798eb70c46vandwalle boolean didOverride = false; 909b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle int networkSwitchType = AUTO_JOIN_IDLE; 9104dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle 9118c9088d11880553458f09377cc60d6eb7e66747bvandwalle String lastSelectedConfiguration = mWifiConfigStore.getLastSelectedConfiguration(); 9128c9088d11880553458f09377cc60d6eb7e66747bvandwalle 913931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle // Reset the currentConfiguration Key, and set it only if WifiStateMachine and 914453aee50caf7e332e77ab3d995d7c87a958e4fd4vandwalle // supplicant agree 915453aee50caf7e332e77ab3d995d7c87a958e4fd4vandwalle mCurrentConfigurationKey = null; 916453aee50caf7e332e77ab3d995d7c87a958e4fd4vandwalle WifiConfiguration currentConfiguration = mWifiStateMachine.getCurrentWifiConfiguration(); 917453aee50caf7e332e77ab3d995d7c87a958e4fd4vandwalle 918f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle WifiConfiguration candidate = null; 919f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 920931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle // Obtain the subset of recently seen networks 92127355a942653264388e909a4276196ee63e57811vandwalle List<WifiConfiguration> list = mWifiConfigStore.getRecentConfiguredNetworks(3000, false); 922f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle if (list == null) { 923f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle if (VDBG) logDbg("attemptAutoJoin nothing"); 924f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle return; 925f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 926f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 927931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle // Find the currently connected network: ask the supplicant directly 928f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle String val = mWifiNative.status(); 929f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle String status[] = val.split("\\r?\\n"); 930f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle if (VDBG) { 931f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle logDbg("attemptAutoJoin() status=" + val + " split=" 932f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle + Integer.toString(status.length)); 933f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 934f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 935b57df70bdf17ba45ef4d18b11414cb24dcbe1fb9vandwalle int supplicantNetId = -1; 936f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle for (String key : status) { 937f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle if (key.regionMatches(0, "id=", 0, 3)) { 938f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle int idx = 3; 939b57df70bdf17ba45ef4d18b11414cb24dcbe1fb9vandwalle supplicantNetId = 0; 940f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle while (idx < key.length()) { 941f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle char c = key.charAt(idx); 942f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 943f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle if ((c >= 0x30) && (c <= 0x39)) { 944b57df70bdf17ba45ef4d18b11414cb24dcbe1fb9vandwalle supplicantNetId *= 10; 945b57df70bdf17ba45ef4d18b11414cb24dcbe1fb9vandwalle supplicantNetId += c - 0x30; 946f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle idx++; 947f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } else { 948f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle break; 949f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 950f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 951f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 952f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 953ed9938883ae2dade81c8be6cd6ceaef3febd5239vandwalle if (DBG) { 954ed9938883ae2dade81c8be6cd6ceaef3febd5239vandwalle logDbg("attemptAutoJoin() num recent config " + Integer.toString(list.size()) 955b57df70bdf17ba45ef4d18b11414cb24dcbe1fb9vandwalle + " ---> suppId=" + Integer.toString(supplicantNetId)); 956ed9938883ae2dade81c8be6cd6ceaef3febd5239vandwalle } 957f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 958453aee50caf7e332e77ab3d995d7c87a958e4fd4vandwalle if (currentConfiguration != null) { 9592451dbcc4f9641df188326215b204b798eb70c46vandwalle if (supplicantNetId != currentConfiguration.networkId 9602451dbcc4f9641df188326215b204b798eb70c46vandwalle //https://b.corp.google.com/issue?id=16484607 9612451dbcc4f9641df188326215b204b798eb70c46vandwalle //mark this confition as an error only if the mismatched networkId are valid 9622451dbcc4f9641df188326215b204b798eb70c46vandwalle && supplicantNetId != WifiConfiguration.INVALID_NETWORK_ID 9632451dbcc4f9641df188326215b204b798eb70c46vandwalle && currentConfiguration.networkId != WifiConfiguration.INVALID_NETWORK_ID) { 964453aee50caf7e332e77ab3d995d7c87a958e4fd4vandwalle logDbg("attemptAutoJoin() ERROR wpa_supplicant out of sync nid=" 965b57df70bdf17ba45ef4d18b11414cb24dcbe1fb9vandwalle + Integer.toString(supplicantNetId) + " WifiStateMachine=" 966453aee50caf7e332e77ab3d995d7c87a958e4fd4vandwalle + Integer.toString(currentConfiguration.networkId)); 967b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle mWifiStateMachine.disconnectCommand(); 968b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle return; 969453aee50caf7e332e77ab3d995d7c87a958e4fd4vandwalle } else { 970453aee50caf7e332e77ab3d995d7c87a958e4fd4vandwalle mCurrentConfigurationKey = currentConfiguration.configKey(); 971453aee50caf7e332e77ab3d995d7c87a958e4fd4vandwalle } 972453aee50caf7e332e77ab3d995d7c87a958e4fd4vandwalle } 973453aee50caf7e332e77ab3d995d7c87a958e4fd4vandwalle 974b57df70bdf17ba45ef4d18b11414cb24dcbe1fb9vandwalle int currentNetId = -1; 975b57df70bdf17ba45ef4d18b11414cb24dcbe1fb9vandwalle if (currentConfiguration != null) { 976931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle // If we are associated to a configuration, it will 977b57df70bdf17ba45ef4d18b11414cb24dcbe1fb9vandwalle // be compared thru the compareNetwork function 978b57df70bdf17ba45ef4d18b11414cb24dcbe1fb9vandwalle currentNetId = currentConfiguration.networkId; 979b57df70bdf17ba45ef4d18b11414cb24dcbe1fb9vandwalle } 980b57df70bdf17ba45ef4d18b11414cb24dcbe1fb9vandwalle 981931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle /** 982931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle * Run thru all visible configurations without looking at the one we 983c6f06c628ee3583b60ff31a7da442e0ac7b26d97vandwalle * are currently associated to 9844dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle * select Best Network candidate from known WifiConfigurations 985931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle */ 986f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle for (WifiConfiguration config : list) { 987f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle if ((config.status == WifiConfiguration.Status.DISABLED) 988f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle && (config.disableReason == WifiConfiguration.DISABLED_AUTH_FAILURE)) { 989ed9938883ae2dade81c8be6cd6ceaef3febd5239vandwalle if (DBG) { 990b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle logDbg("attemptAutoJoin skip candidate due to auth failure: " 991ed9938883ae2dade81c8be6cd6ceaef3febd5239vandwalle + config.configKey(true)); 992ed9938883ae2dade81c8be6cd6ceaef3febd5239vandwalle } 993f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle continue; 994f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 995453aee50caf7e332e77ab3d995d7c87a958e4fd4vandwalle 996e86c962bb99a8b126ed64ddcc6b112161549e26dvandwalle if (config.SSID == null) { 997b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle continue; 998e86c962bb99a8b126ed64ddcc6b112161549e26dvandwalle } 999e86c962bb99a8b126ed64ddcc6b112161549e26dvandwalle 100027355a942653264388e909a4276196ee63e57811vandwalle if (config.autoJoinStatus >= 100127355a942653264388e909a4276196ee63e57811vandwalle WifiConfiguration.AUTO_JOIN_DISABLED_ON_AUTH_FAILURE) { 1002931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle // Avoid networks disabled because of AUTH failure altogether 1003ed9938883ae2dade81c8be6cd6ceaef3febd5239vandwalle if (DBG) { 1004ed9938883ae2dade81c8be6cd6ceaef3febd5239vandwalle logDbg("attemptAutoJoin skip candidate due to auto join status " 1005ed9938883ae2dade81c8be6cd6ceaef3febd5239vandwalle + Integer.toString(config.autoJoinStatus) + " key " 1006ed9938883ae2dade81c8be6cd6ceaef3febd5239vandwalle + config.configKey(true)); 1007ed9938883ae2dade81c8be6cd6ceaef3febd5239vandwalle } 1008f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle continue; 1009f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 1010f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 1011931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle // Try to un-blacklist based on elapsed time 101227355a942653264388e909a4276196ee63e57811vandwalle if (config.blackListTimestamp > 0) { 101327355a942653264388e909a4276196ee63e57811vandwalle long now = System.currentTimeMillis(); 101427355a942653264388e909a4276196ee63e57811vandwalle if (now < config.blackListTimestamp) { 1015931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle /** 1016931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle * looks like there was a change in the system clock since we black listed, and 1017931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle * timestamp is not meaningful anymore, hence lose it. 1018931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle * this event should be rare enough so that we still want to lose the black list 10192451dbcc4f9641df188326215b204b798eb70c46vandwalle */ 102027355a942653264388e909a4276196ee63e57811vandwalle config.setAutoJoinStatus(WifiConfiguration.AUTO_JOIN_ENABLED); 102127355a942653264388e909a4276196ee63e57811vandwalle } else { 10224dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle if ((now - config.blackListTimestamp) > loseBlackListHardMilli) { 1023931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle // Reenable it after 18 hours, i.e. next day 102427355a942653264388e909a4276196ee63e57811vandwalle config.setAutoJoinStatus(WifiConfiguration.AUTO_JOIN_ENABLED); 10254dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle } else if ((now - config.blackListTimestamp) > loseBlackListSoftMilli) { 1026931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle // Lose blacklisting due to bad link 102727355a942653264388e909a4276196ee63e57811vandwalle config.setAutoJoinStatus(config.autoJoinStatus - 8); 102827355a942653264388e909a4276196ee63e57811vandwalle } 102927355a942653264388e909a4276196ee63e57811vandwalle } 103027355a942653264388e909a4276196ee63e57811vandwalle } 103127355a942653264388e909a4276196ee63e57811vandwalle 1032931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle // Try to unblacklist based on good visibility 103327355a942653264388e909a4276196ee63e57811vandwalle if (config.visibility.rssi5 < WifiConfiguration.UNBLACKLIST_THRESHOLD_5_SOFT 103427355a942653264388e909a4276196ee63e57811vandwalle && config.visibility.rssi24 < WifiConfiguration.UNBLACKLIST_THRESHOLD_24_SOFT) { 103527355a942653264388e909a4276196ee63e57811vandwalle if (DBG) { 103627355a942653264388e909a4276196ee63e57811vandwalle logDbg("attemptAutoJoin skip candidate due to auto join status " 10374dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle + config.autoJoinStatus 10384dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle + " key " + config.configKey(true) 10394dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle + " rssi=(" + config.visibility.rssi24 10404dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle + "," + config.visibility.rssi5 10414dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle + ") num=(" + config.visibility.num24 10424dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle + "," + config.visibility.num5 + ")"); 104327355a942653264388e909a4276196ee63e57811vandwalle } 104427355a942653264388e909a4276196ee63e57811vandwalle } else if (config.visibility.rssi5 < WifiConfiguration.UNBLACKLIST_THRESHOLD_5_HARD 104527355a942653264388e909a4276196ee63e57811vandwalle && config.visibility.rssi24 < WifiConfiguration.UNBLACKLIST_THRESHOLD_24_HARD) { 1046931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle // If the network is simply temporary disabled, don't allow reconnect until 1047931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle // RSSI becomes good enough 104827355a942653264388e909a4276196ee63e57811vandwalle config.setAutoJoinStatus(config.autoJoinStatus - 1); 104927355a942653264388e909a4276196ee63e57811vandwalle if (DBG) { 105027355a942653264388e909a4276196ee63e57811vandwalle logDbg("attemptAutoJoin good candidate seen, bumped soft -> status=" 105127355a942653264388e909a4276196ee63e57811vandwalle + config.autoJoinStatus 10524dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle + " key " + config.configKey(true) + " rssi=(" 10534dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle + config.visibility.rssi24 + "," + config.visibility.rssi5 10544dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle + ") num=(" + config.visibility.num24 10554dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle + "," + config.visibility.num5 + ")"); 105627355a942653264388e909a4276196ee63e57811vandwalle } 105727355a942653264388e909a4276196ee63e57811vandwalle } else { 1058c6f06c628ee3583b60ff31a7da442e0ac7b26d97vandwalle config.setAutoJoinStatus(config.autoJoinStatus - 3); 105927355a942653264388e909a4276196ee63e57811vandwalle if (DBG) { 106027355a942653264388e909a4276196ee63e57811vandwalle logDbg("attemptAutoJoin good candidate seen, bumped hard -> status=" 106127355a942653264388e909a4276196ee63e57811vandwalle + config.autoJoinStatus 10624dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle + " key " + config.configKey(true) + " rssi=(" 10634dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle + config.visibility.rssi24 + "," + config.visibility.rssi5 10644dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle + ") num=(" + config.visibility.num24 10654dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle + "," + config.visibility.num5 + ")"); 106627355a942653264388e909a4276196ee63e57811vandwalle } 106727355a942653264388e909a4276196ee63e57811vandwalle } 106827355a942653264388e909a4276196ee63e57811vandwalle 106927355a942653264388e909a4276196ee63e57811vandwalle if (config.autoJoinStatus >= 107027355a942653264388e909a4276196ee63e57811vandwalle WifiConfiguration.AUTO_JOIN_TEMPORARY_DISABLED) { 1071931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle // Network is blacklisted, skip 10724dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle if (DBG) { 10734dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle logDbg("attemptAutoJoin skip blacklisted -> status=" 10744dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle + config.autoJoinStatus 10754dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle + " key " + config.configKey(true) + " rssi=(" 10764dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle + config.visibility.rssi24 + "," + config.visibility.rssi5 10774dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle + ") num=(" + config.visibility.num24 10784dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle + "," + config.visibility.num5 + ")"); 10794dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle } 108027355a942653264388e909a4276196ee63e57811vandwalle continue; 108127355a942653264388e909a4276196ee63e57811vandwalle } 1082f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle if (config.networkId == currentNetId) { 1083ed9938883ae2dade81c8be6cd6ceaef3febd5239vandwalle if (DBG) { 108421bc54cb37a0085b1c909cb4d55ebb12a2facefbvandwalle logDbg("attemptAutoJoin skip current candidate " 108521bc54cb37a0085b1c909cb4d55ebb12a2facefbvandwalle + Integer.toString(currentNetId) 1086ed9938883ae2dade81c8be6cd6ceaef3febd5239vandwalle + " key " + config.configKey(true)); 1087ed9938883ae2dade81c8be6cd6ceaef3febd5239vandwalle } 1088f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle continue; 1089f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 1090f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 109121bc54cb37a0085b1c909cb4d55ebb12a2facefbvandwalle if (lastSelectedConfiguration == null || 109221bc54cb37a0085b1c909cb4d55ebb12a2facefbvandwalle !config.configKey().equals(lastSelectedConfiguration)) { 1093931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle // Don't try to autojoin a network that is too far 10948c9088d11880553458f09377cc60d6eb7e66747bvandwalle if (config.visibility == null) { 10958c9088d11880553458f09377cc60d6eb7e66747bvandwalle continue; 10968c9088d11880553458f09377cc60d6eb7e66747bvandwalle } 109727355a942653264388e909a4276196ee63e57811vandwalle if (config.visibility.rssi5 < WifiConfiguration.INITIAL_AUTO_JOIN_ATTEMPT_MIN_5 1098c6f06c628ee3583b60ff31a7da442e0ac7b26d97vandwalle && config.visibility.rssi24 1099c6f06c628ee3583b60ff31a7da442e0ac7b26d97vandwalle < WifiConfiguration.INITIAL_AUTO_JOIN_ATTEMPT_MIN_24) { 11004dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle if (DBG) { 11014dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle logDbg("attemptAutoJoin gskip due to low visibility -> status=" 11024dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle + config.autoJoinStatus 11034dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle + " key " + config.configKey(true) + " rssi=" 11044dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle + config.visibility.rssi24 + ", " + config.visibility.rssi5 11054dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle + " num=" + config.visibility.num24 11064dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle + ", " + config.visibility.num5); 11074dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle } 11088c9088d11880553458f09377cc60d6eb7e66747bvandwalle continue; 11098c9088d11880553458f09377cc60d6eb7e66747bvandwalle } 11108c9088d11880553458f09377cc60d6eb7e66747bvandwalle } 11118c9088d11880553458f09377cc60d6eb7e66747bvandwalle 1112ed9938883ae2dade81c8be6cd6ceaef3febd5239vandwalle if (DBG) { 1113c6f06c628ee3583b60ff31a7da442e0ac7b26d97vandwalle logDbg("attemptAutoJoin trying candidate id=" 1114c6f06c628ee3583b60ff31a7da442e0ac7b26d97vandwalle + Integer.toString(config.networkId) + " " 11154dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle + config.SSID + " key " + config.configKey(true) 11164dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle + " status=" + config.autoJoinStatus); 1117ed9938883ae2dade81c8be6cd6ceaef3febd5239vandwalle } 1118f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 1119f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle if (candidate == null) { 1120f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle candidate = config; 1121f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } else { 1122f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle if (VDBG) { 1123453aee50caf7e332e77ab3d995d7c87a958e4fd4vandwalle logDbg("attemptAutoJoin will compare candidate " + candidate.configKey() 11244dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle + " with " + config.configKey()); 1125f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 1126f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 11272451dbcc4f9641df188326215b204b798eb70c46vandwalle int scorerOrder = compareWifiConfigurationsWithScorer(candidate, config); 1128f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle int order = compareWifiConfigurations(candidate, config); 11292451dbcc4f9641df188326215b204b798eb70c46vandwalle 11302451dbcc4f9641df188326215b204b798eb70c46vandwalle if (scorerOrder * order < 0) { 11312451dbcc4f9641df188326215b204b798eb70c46vandwalle // For debugging purpose, remember that an override happened 11322451dbcc4f9641df188326215b204b798eb70c46vandwalle // during that autojoin Attempt 11332451dbcc4f9641df188326215b204b798eb70c46vandwalle didOverride = true; 11342451dbcc4f9641df188326215b204b798eb70c46vandwalle candidate.numScorerOverride++; 11352451dbcc4f9641df188326215b204b798eb70c46vandwalle config.numScorerOverride++; 11362451dbcc4f9641df188326215b204b798eb70c46vandwalle } 11372451dbcc4f9641df188326215b204b798eb70c46vandwalle 11382451dbcc4f9641df188326215b204b798eb70c46vandwalle if (scorerOrder != 0) { 11392451dbcc4f9641df188326215b204b798eb70c46vandwalle // If the scorer came up with a result then use the scorer's result, else use 11402451dbcc4f9641df188326215b204b798eb70c46vandwalle // the order provided by the base comparison function 11412451dbcc4f9641df188326215b204b798eb70c46vandwalle order = scorerOrder; 11422451dbcc4f9641df188326215b204b798eb70c46vandwalle } 11432451dbcc4f9641df188326215b204b798eb70c46vandwalle 11442451dbcc4f9641df188326215b204b798eb70c46vandwalle // The lastSelectedConfiguration is the configuration the user has manually selected 11452451dbcc4f9641df188326215b204b798eb70c46vandwalle // thru thru WifiPicker, or that a 3rd party app asked us to connect to via the 11462451dbcc4f9641df188326215b204b798eb70c46vandwalle // enableNetwork with disableOthers=true WifiManager API 11472451dbcc4f9641df188326215b204b798eb70c46vandwalle // As this is a direct user choice, we strongly prefer this configuration, 11482451dbcc4f9641df188326215b204b798eb70c46vandwalle // hence give +/-100 11492451dbcc4f9641df188326215b204b798eb70c46vandwalle if ((lastSelectedConfiguration != null) 11502451dbcc4f9641df188326215b204b798eb70c46vandwalle && candidate.configKey().equals(lastSelectedConfiguration)) { 11512451dbcc4f9641df188326215b204b798eb70c46vandwalle // candidate is the last selected configuration, 11522451dbcc4f9641df188326215b204b798eb70c46vandwalle // so keep it above connect choices (+/-60) and 11532451dbcc4f9641df188326215b204b798eb70c46vandwalle // above RSSI/scorer based selection of linked configuration (+/- 50) 11542451dbcc4f9641df188326215b204b798eb70c46vandwalle // by reducing order by -100 11552451dbcc4f9641df188326215b204b798eb70c46vandwalle order = order - 100; 11562451dbcc4f9641df188326215b204b798eb70c46vandwalle if (VDBG) { 11572451dbcc4f9641df188326215b204b798eb70c46vandwalle logDbg(" prefers -100 " + candidate.configKey() 11582451dbcc4f9641df188326215b204b798eb70c46vandwalle + " over " + config.configKey() 11592451dbcc4f9641df188326215b204b798eb70c46vandwalle + " because it is the last selected -> " 11602451dbcc4f9641df188326215b204b798eb70c46vandwalle + Integer.toString(order)); 11612451dbcc4f9641df188326215b204b798eb70c46vandwalle } 11622451dbcc4f9641df188326215b204b798eb70c46vandwalle } else if ((lastSelectedConfiguration != null) 11632451dbcc4f9641df188326215b204b798eb70c46vandwalle && config.configKey().equals(lastSelectedConfiguration)) { 11642451dbcc4f9641df188326215b204b798eb70c46vandwalle // config is the last selected configuration, 11652451dbcc4f9641df188326215b204b798eb70c46vandwalle // so keep it above connect choices (+/-60) and 11662451dbcc4f9641df188326215b204b798eb70c46vandwalle // above RSSI/scorer based selection of linked configuration (+/- 50) 11672451dbcc4f9641df188326215b204b798eb70c46vandwalle // by increasing order by +100 11682451dbcc4f9641df188326215b204b798eb70c46vandwalle order = order + 100; 11692451dbcc4f9641df188326215b204b798eb70c46vandwalle if (VDBG) { 11702451dbcc4f9641df188326215b204b798eb70c46vandwalle logDbg(" prefers +100 " + config.configKey() 11712451dbcc4f9641df188326215b204b798eb70c46vandwalle + " over " + candidate.configKey() 11722451dbcc4f9641df188326215b204b798eb70c46vandwalle + " because it is the last selected -> " 11732451dbcc4f9641df188326215b204b798eb70c46vandwalle + Integer.toString(order)); 11742451dbcc4f9641df188326215b204b798eb70c46vandwalle } 11752451dbcc4f9641df188326215b204b798eb70c46vandwalle } 11762451dbcc4f9641df188326215b204b798eb70c46vandwalle 1177f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle if (order > 0) { 1178931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle // Ascending : candidate < config 1179f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle candidate = config; 1180f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 1181f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 1182f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 1183f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 11842451dbcc4f9641df188326215b204b798eb70c46vandwalle /* Wait for VPN to be available on the system to make use of this code 11852451dbcc4f9641df188326215b204b798eb70c46vandwalle // Now, go thru scan result to try finding a better untrusted network 1186f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle if (mNetworkScoreCache != null) { 1187f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle int rssi5 = WifiConfiguration.INVALID_RSSI; 1188f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle int rssi24 = WifiConfiguration.INVALID_RSSI; 1189f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle WifiConfiguration.Visibility visibility; 1190f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle if (candidate != null) { 1191f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle rssi5 = candidate.visibility.rssi5; 1192f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle rssi24 = candidate.visibility.rssi24; 1193f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 1194f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 1195931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle // Get current date 11962451dbcc4f9641df188326215b204b798eb70c46vandwalle long nowMs = System.currentTimeMillis(); 1197f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 11982451dbcc4f9641df188326215b204b798eb70c46vandwalle // Look for untrusted scored network only if the current candidate is bad 1199f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle if (rssi5 < -60 && rssi24 < -70) { 1200f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle for (ScanResult result : scanResultCache.values()) { 12012451dbcc4f9641df188326215b204b798eb70c46vandwalle if ((nowMs - result.seen) < 3000) { 1202f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle int score = mNetworkScoreCache.getNetworkScore(result); 1203f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle if (score > 0) { 1204931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle // Try any arbitrary formula for now, adding apple and oranges, 1205f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle // i.e. adding network score and "dBm over noise" 12064dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle if (result.is24GHz()) { 1207f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle if ((result.level + score) > (rssi24 -40)) { 1208931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle // Force it as open, TBD should we otherwise verify that this 1209f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle // BSSID only supports open?? 1210f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle result.capabilities = ""; 1211f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 1212931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle // Switch to this scan result 1213f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle candidate = 1214c6f06c628ee3583b60ff31a7da442e0ac7b26d97vandwalle mWifiConfigStore.wifiConfigurationFromScanResult(result); 1215f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle candidate.ephemeral = true; 1216f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 1217f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } else { 1218f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle if ((result.level + score) > (rssi5 -30)) { 1219931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle // Force it as open, TBD should we otherwise verify that this 1220f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle // BSSID only supports open?? 1221f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle result.capabilities = ""; 1222f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 1223931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle // Switch to this scan result 1224f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle candidate = 1225c6f06c628ee3583b60ff31a7da442e0ac7b26d97vandwalle mWifiConfigStore.wifiConfigurationFromScanResult(result); 1226f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle candidate.ephemeral = true; 1227f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 1228f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 1229f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 1230f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 1231f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 1232f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 12332451dbcc4f9641df188326215b204b798eb70c46vandwalle }*/ 1234b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle 1235931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle /** 1236931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle * If candidate is found, check the state of the connection so as 1237931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle * to decide if we should be acting on this candidate and switching over 1238931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle */ 1239b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle int networkDelta = compareNetwork(candidate); 1240b57df70bdf17ba45ef4d18b11414cb24dcbe1fb9vandwalle if (DBG && candidate != null) { 1241b57df70bdf17ba45ef4d18b11414cb24dcbe1fb9vandwalle logDbg("attemptAutoJoin compare SSID candidate : delta=" 1242b57df70bdf17ba45ef4d18b11414cb24dcbe1fb9vandwalle + Integer.toString(networkDelta) + " " 1243b57df70bdf17ba45ef4d18b11414cb24dcbe1fb9vandwalle + candidate.configKey() 1244c6f06c628ee3583b60ff31a7da442e0ac7b26d97vandwalle + " linked=" + (currentConfiguration != null 1245c6f06c628ee3583b60ff31a7da442e0ac7b26d97vandwalle && currentConfiguration.isLinked(candidate))); 1246b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle } 12474dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle 1248931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle /** 1249931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle * Ask WifiStateMachine permission to switch : 1250931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle * if user is currently streaming voice traffic, 1251931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle * then we should not be allowed to switch regardless of the delta 1252931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle */ 1253b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle if (mWifiStateMachine.shouldSwitchNetwork(networkDelta)) { 1254b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle if (mStaStaSupported) { 1255b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle logDbg("mStaStaSupported --> error do nothing now "); 1256b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle } else { 1257b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle if (currentConfiguration != null && currentConfiguration.isLinked(candidate)) { 1258b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle networkSwitchType = AUTO_JOIN_EXTENDED_ROAMING; 1259b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle } else { 1260b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle networkSwitchType = AUTO_JOIN_OUT_OF_NETWORK_ROAMING; 1261b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle } 1262b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle if (DBG) { 1263b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle logDbg("AutoJoin auto connect with netId " 1264b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle + Integer.toString(candidate.networkId) 1265b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle + " to " + candidate.configKey()); 1266b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle } 12672451dbcc4f9641df188326215b204b798eb70c46vandwalle if (didOverride) { 12682451dbcc4f9641df188326215b204b798eb70c46vandwalle candidate.numScorerOverrideAndSwitchedNetwork++; 12692451dbcc4f9641df188326215b204b798eb70c46vandwalle } 1270b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle mWifiStateMachine.sendMessage(WifiStateMachine.CMD_AUTO_CONNECT, 1271b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle candidate.networkId, networkSwitchType, candidate); 12724dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle } 1273b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle } 12744dc6f3a322806b25d50039614cde1b94fe91ab17vandwalle 1275b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle if (networkSwitchType == AUTO_JOIN_IDLE) { 1276931338d1533d1bd11ba0e5aebb4e4b7b2c8ab056vandwalle // Attempt same WifiConfiguration roaming 1277b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle ScanResult roamCandidate = attemptRoam(currentConfiguration, 3000); 1278b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle if (roamCandidate != null) { 1279b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle if (DBG) { 1280b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle logDbg("AutoJoin auto roam with netId " 1281b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle + Integer.toString(currentConfiguration.networkId) 1282b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle + " " + currentConfiguration.configKey() + " to BSSID=" 1283b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle + roamCandidate.BSSID + " freq=" + roamCandidate.frequency 1284b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle + " RSSI=" + roamCandidate.frequency); 1285b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle } 1286b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle networkSwitchType = AUTO_JOIN_ROAMING; 1287b07da189850a4bfa268f8ab9be7867935eb2ecb5vandwalle mWifiStateMachine.sendMessage(WifiStateMachine.CMD_AUTO_ROAM, 1288b07da189850a4bfa268f8ab9be7867935eb2ecb5vandwalle currentConfiguration.networkId, 1, roamCandidate); 1289f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 1290f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 1291b97e66604f472f67c233bb8f8d9630bb36131e2cvandwalle if (VDBG) logDbg("Done attemptAutoJoin status=" + Integer.toString(networkSwitchType)); 1292f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle } 1293f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle} 1294f22d23092ab37286a5ef9d257d5bb32c421d2669vandwalle 1295