1 /* 2 * Copyright (C) 2017 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.settingslib.wifi; 18 19 import android.content.Context; 20 import android.net.wifi.ScanResult; 21 import android.net.wifi.WifiConfiguration; 22 import android.net.wifi.WifiInfo; 23 import android.os.SystemClock; 24 25 import androidx.annotation.VisibleForTesting; 26 27 import com.android.settingslib.R; 28 29 import java.util.Map; 30 31 public class WifiUtils { 32 33 public static String buildLoggingSummary(AccessPoint accessPoint, WifiConfiguration config) { 34 final StringBuilder summary = new StringBuilder(); 35 final WifiInfo info = accessPoint.getInfo(); 36 // Add RSSI/band information for this config, what was seen up to 6 seconds ago 37 // verbose WiFi Logging is only turned on thru developers settings 38 if (accessPoint.isActive() && info != null) { 39 summary.append(" f=" + Integer.toString(info.getFrequency())); 40 } 41 summary.append(" " + getVisibilityStatus(accessPoint)); 42 if (config != null && !config.getNetworkSelectionStatus().isNetworkEnabled()) { 43 summary.append(" (" + config.getNetworkSelectionStatus().getNetworkStatusString()); 44 if (config.getNetworkSelectionStatus().getDisableTime() > 0) { 45 long now = System.currentTimeMillis(); 46 long diff = (now - config.getNetworkSelectionStatus().getDisableTime()) / 1000; 47 long sec = diff % 60; //seconds 48 long min = (diff / 60) % 60; //minutes 49 long hour = (min / 60) % 60; //hours 50 summary.append(", "); 51 if (hour > 0) summary.append(Long.toString(hour) + "h "); 52 summary.append(Long.toString(min) + "m "); 53 summary.append(Long.toString(sec) + "s "); 54 } 55 summary.append(")"); 56 } 57 58 if (config != null) { 59 WifiConfiguration.NetworkSelectionStatus networkStatus = 60 config.getNetworkSelectionStatus(); 61 for (int index = WifiConfiguration.NetworkSelectionStatus.NETWORK_SELECTION_ENABLE; 62 index < WifiConfiguration.NetworkSelectionStatus 63 .NETWORK_SELECTION_DISABLED_MAX; index++) { 64 if (networkStatus.getDisableReasonCounter(index) != 0) { 65 summary.append(" " + WifiConfiguration.NetworkSelectionStatus 66 .getNetworkDisableReasonString(index) + "=" 67 + networkStatus.getDisableReasonCounter(index)); 68 } 69 } 70 } 71 72 return summary.toString(); 73 } 74 75 /** 76 * Returns the visibility status of the WifiConfiguration. 77 * 78 * @return autojoin debugging information 79 * TODO: use a string formatter 80 * ["rssi 5Ghz", "num results on 5GHz" / "rssi 5Ghz", "num results on 5GHz"] 81 * For instance [-40,5/-30,2] 82 */ 83 @VisibleForTesting 84 static String getVisibilityStatus(AccessPoint accessPoint) { 85 final WifiInfo info = accessPoint.getInfo(); 86 StringBuilder visibility = new StringBuilder(); 87 StringBuilder scans24GHz = new StringBuilder(); 88 StringBuilder scans5GHz = new StringBuilder(); 89 String bssid = null; 90 91 if (accessPoint.isActive() && info != null) { 92 bssid = info.getBSSID(); 93 if (bssid != null) { 94 visibility.append(" ").append(bssid); 95 } 96 visibility.append(" rssi=").append(info.getRssi()); 97 visibility.append(" "); 98 visibility.append(" score=").append(info.score); 99 if (accessPoint.getSpeed() != AccessPoint.Speed.NONE) { 100 visibility.append(" speed=").append(accessPoint.getSpeedLabel()); 101 } 102 visibility.append(String.format(" tx=%.1f,", info.txSuccessRate)); 103 visibility.append(String.format("%.1f,", info.txRetriesRate)); 104 visibility.append(String.format("%.1f ", info.txBadRate)); 105 visibility.append(String.format("rx=%.1f", info.rxSuccessRate)); 106 } 107 108 int maxRssi5 = WifiConfiguration.INVALID_RSSI; 109 int maxRssi24 = WifiConfiguration.INVALID_RSSI; 110 final int maxDisplayedScans = 4; 111 int num5 = 0; // number of scanned BSSID on 5GHz band 112 int num24 = 0; // number of scanned BSSID on 2.4Ghz band 113 int numBlackListed = 0; 114 115 // TODO: sort list by RSSI or age 116 long nowMs = SystemClock.elapsedRealtime(); 117 for (ScanResult result : accessPoint.getScanResults()) { 118 if (result == null) { 119 continue; 120 } 121 if (result.frequency >= AccessPoint.LOWER_FREQ_5GHZ 122 && result.frequency <= AccessPoint.HIGHER_FREQ_5GHZ) { 123 // Strictly speaking: [4915, 5825] 124 num5++; 125 126 if (result.level > maxRssi5) { 127 maxRssi5 = result.level; 128 } 129 if (num5 <= maxDisplayedScans) { 130 scans5GHz.append( 131 verboseScanResultSummary(accessPoint, result, bssid, 132 nowMs)); 133 } 134 } else if (result.frequency >= AccessPoint.LOWER_FREQ_24GHZ 135 && result.frequency <= AccessPoint.HIGHER_FREQ_24GHZ) { 136 // Strictly speaking: [2412, 2482] 137 num24++; 138 139 if (result.level > maxRssi24) { 140 maxRssi24 = result.level; 141 } 142 if (num24 <= maxDisplayedScans) { 143 scans24GHz.append( 144 verboseScanResultSummary(accessPoint, result, bssid, 145 nowMs)); 146 } 147 } 148 } 149 visibility.append(" ["); 150 if (num24 > 0) { 151 visibility.append("(").append(num24).append(")"); 152 if (num24 > maxDisplayedScans) { 153 visibility.append("max=").append(maxRssi24).append(","); 154 } 155 visibility.append(scans24GHz.toString()); 156 } 157 visibility.append(";"); 158 if (num5 > 0) { 159 visibility.append("(").append(num5).append(")"); 160 if (num5 > maxDisplayedScans) { 161 visibility.append("max=").append(maxRssi5).append(","); 162 } 163 visibility.append(scans5GHz.toString()); 164 } 165 if (numBlackListed > 0) { 166 visibility.append("!").append(numBlackListed); 167 } 168 visibility.append("]"); 169 170 return visibility.toString(); 171 } 172 173 @VisibleForTesting 174 /* package */ static String verboseScanResultSummary(AccessPoint accessPoint, ScanResult result, 175 String bssid, long nowMs) { 176 StringBuilder stringBuilder = new StringBuilder(); 177 stringBuilder.append(" \n{").append(result.BSSID); 178 if (result.BSSID.equals(bssid)) { 179 stringBuilder.append("*"); 180 } 181 stringBuilder.append("=").append(result.frequency); 182 stringBuilder.append(",").append(result.level); 183 int speed = getSpecificApSpeed(result, accessPoint.getScoredNetworkCache()); 184 if (speed != AccessPoint.Speed.NONE) { 185 stringBuilder.append(",") 186 .append(accessPoint.getSpeedLabel(speed)); 187 } 188 int ageSeconds = (int) (nowMs - result.timestamp / 1000) / 1000; 189 stringBuilder.append(",").append(ageSeconds).append("s"); 190 stringBuilder.append("}"); 191 return stringBuilder.toString(); 192 } 193 194 @AccessPoint.Speed 195 private static int getSpecificApSpeed(ScanResult result, 196 Map<String, TimestampedScoredNetwork> scoredNetworkCache) { 197 TimestampedScoredNetwork timedScore = scoredNetworkCache.get(result.BSSID); 198 if (timedScore == null) { 199 return AccessPoint.Speed.NONE; 200 } 201 // For debugging purposes we may want to use mRssi rather than result.level as the average 202 // speed wil be determined by mRssi 203 return timedScore.getScore().calculateBadge(result.level); 204 } 205 206 public static String getMeteredLabel(Context context, WifiConfiguration config) { 207 // meteredOverride is whether the user manually set the metered setting or not. 208 // meteredHint is whether the network itself is telling us that it is metered 209 if (config.meteredOverride == WifiConfiguration.METERED_OVERRIDE_METERED 210 || (config.meteredHint && !isMeteredOverridden(config))) { 211 return context.getString(R.string.wifi_metered_label); 212 } 213 return context.getString(R.string.wifi_unmetered_label); 214 } 215 216 public static boolean isMeteredOverridden(WifiConfiguration config) { 217 return config.meteredOverride != WifiConfiguration.METERED_OVERRIDE_NONE; 218 } 219 } 220
