| /* |
| * Copyright (C) 2017 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.settingslib.wifi; |
| |
| import android.net.wifi.ScanResult; |
| import android.net.wifi.WifiConfiguration; |
| import android.net.wifi.WifiInfo; |
| import android.os.SystemClock; |
| import android.support.annotation.VisibleForTesting; |
| |
| import java.util.Map; |
| |
| public class WifiUtils { |
| |
| public static String buildLoggingSummary(AccessPoint accessPoint, WifiConfiguration config) { |
| final StringBuilder summary = new StringBuilder(); |
| final WifiInfo info = accessPoint.getInfo(); |
| // Add RSSI/band information for this config, what was seen up to 6 seconds ago |
| // verbose WiFi Logging is only turned on thru developers settings |
| if (accessPoint.isActive() && info != null) { |
| summary.append(" f=" + Integer.toString(info.getFrequency())); |
| } |
| summary.append(" " + getVisibilityStatus(accessPoint)); |
| if (config != null && !config.getNetworkSelectionStatus().isNetworkEnabled()) { |
| summary.append(" (" + config.getNetworkSelectionStatus().getNetworkStatusString()); |
| if (config.getNetworkSelectionStatus().getDisableTime() > 0) { |
| long now = System.currentTimeMillis(); |
| long diff = (now - config.getNetworkSelectionStatus().getDisableTime()) / 1000; |
| long sec = diff % 60; //seconds |
| long min = (diff / 60) % 60; //minutes |
| long hour = (min / 60) % 60; //hours |
| summary.append(", "); |
| if (hour > 0) summary.append(Long.toString(hour) + "h "); |
| summary.append(Long.toString(min) + "m "); |
| summary.append(Long.toString(sec) + "s "); |
| } |
| summary.append(")"); |
| } |
| |
| if (config != null) { |
| WifiConfiguration.NetworkSelectionStatus networkStatus = |
| config.getNetworkSelectionStatus(); |
| for (int index = WifiConfiguration.NetworkSelectionStatus.NETWORK_SELECTION_ENABLE; |
| index < WifiConfiguration.NetworkSelectionStatus |
| .NETWORK_SELECTION_DISABLED_MAX; index++) { |
| if (networkStatus.getDisableReasonCounter(index) != 0) { |
| summary.append(" " + WifiConfiguration.NetworkSelectionStatus |
| .getNetworkDisableReasonString(index) + "=" |
| + networkStatus.getDisableReasonCounter(index)); |
| } |
| } |
| } |
| |
| return summary.toString(); |
| } |
| |
| /** |
| * Returns the visibility status of the WifiConfiguration. |
| * |
| * @return autojoin debugging information |
| * TODO: use a string formatter |
| * ["rssi 5Ghz", "num results on 5GHz" / "rssi 5Ghz", "num results on 5GHz"] |
| * For instance [-40,5/-30,2] |
| */ |
| private static String getVisibilityStatus(AccessPoint accessPoint) { |
| final WifiInfo info = accessPoint.getInfo(); |
| StringBuilder visibility = new StringBuilder(); |
| StringBuilder scans24GHz = new StringBuilder(); |
| StringBuilder scans5GHz = new StringBuilder(); |
| String bssid = null; |
| |
| if (accessPoint.isActive() && info != null) { |
| bssid = info.getBSSID(); |
| if (bssid != null) { |
| visibility.append(" ").append(bssid); |
| } |
| visibility.append(" rssi=").append(info.getRssi()); |
| visibility.append(" "); |
| visibility.append(" score=").append(info.score); |
| if (accessPoint.getSpeed() != AccessPoint.Speed.NONE) { |
| visibility.append(" speed=").append(accessPoint.getSpeedLabel()); |
| } |
| visibility.append(String.format(" tx=%.1f,", info.txSuccessRate)); |
| visibility.append(String.format("%.1f,", info.txRetriesRate)); |
| visibility.append(String.format("%.1f ", info.txBadRate)); |
| visibility.append(String.format("rx=%.1f", info.rxSuccessRate)); |
| } |
| |
| int maxRssi5 = WifiConfiguration.INVALID_RSSI; |
| int maxRssi24 = WifiConfiguration.INVALID_RSSI; |
| final int maxDisplayedScans = 4; |
| int num5 = 0; // number of scanned BSSID on 5GHz band |
| int num24 = 0; // number of scanned BSSID on 2.4Ghz band |
| int numBlackListed = 0; |
| |
| // TODO: sort list by RSSI or age |
| long nowMs = SystemClock.elapsedRealtime(); |
| for (ScanResult result : accessPoint.getScanResults()) { |
| if (result.frequency >= AccessPoint.LOWER_FREQ_5GHZ |
| && result.frequency <= AccessPoint.HIGHER_FREQ_5GHZ) { |
| // Strictly speaking: [4915, 5825] |
| num5++; |
| |
| if (result.level > maxRssi5) { |
| maxRssi5 = result.level; |
| } |
| if (num5 <= maxDisplayedScans) { |
| scans5GHz.append( |
| verboseScanResultSummary(accessPoint, result, bssid, |
| nowMs)); |
| } |
| } else if (result.frequency >= AccessPoint.LOWER_FREQ_24GHZ |
| && result.frequency <= AccessPoint.HIGHER_FREQ_24GHZ) { |
| // Strictly speaking: [2412, 2482] |
| num24++; |
| |
| if (result.level > maxRssi24) { |
| maxRssi24 = result.level; |
| } |
| if (num24 <= maxDisplayedScans) { |
| scans24GHz.append( |
| verboseScanResultSummary(accessPoint, result, bssid, |
| nowMs)); |
| } |
| } |
| } |
| visibility.append(" ["); |
| if (num24 > 0) { |
| visibility.append("(").append(num24).append(")"); |
| if (num24 > maxDisplayedScans) { |
| visibility.append("max=").append(maxRssi24).append(","); |
| } |
| visibility.append(scans24GHz.toString()); |
| } |
| visibility.append(";"); |
| if (num5 > 0) { |
| visibility.append("(").append(num5).append(")"); |
| if (num5 > maxDisplayedScans) { |
| visibility.append("max=").append(maxRssi5).append(","); |
| } |
| visibility.append(scans5GHz.toString()); |
| } |
| if (numBlackListed > 0) { |
| visibility.append("!").append(numBlackListed); |
| } |
| visibility.append("]"); |
| |
| return visibility.toString(); |
| } |
| |
| @VisibleForTesting |
| /* package */ static String verboseScanResultSummary(AccessPoint accessPoint, ScanResult result, |
| String bssid, long nowMs) { |
| StringBuilder stringBuilder = new StringBuilder(); |
| stringBuilder.append(" \n{").append(result.BSSID); |
| if (result.BSSID.equals(bssid)) { |
| stringBuilder.append("*"); |
| } |
| stringBuilder.append("=").append(result.frequency); |
| stringBuilder.append(",").append(result.level); |
| int speed = getSpecificApSpeed(result, accessPoint.getScoredNetworkCache()); |
| if (speed != AccessPoint.Speed.NONE) { |
| stringBuilder.append(",") |
| .append(accessPoint.getSpeedLabel(speed)); |
| } |
| int ageSeconds = (int) (nowMs - result.timestamp / 1000) / 1000; |
| stringBuilder.append(",").append(ageSeconds).append("s"); |
| stringBuilder.append("}"); |
| return stringBuilder.toString(); |
| } |
| |
| @AccessPoint.Speed |
| private static int getSpecificApSpeed(ScanResult result, |
| Map<String, TimestampedScoredNetwork> scoredNetworkCache) { |
| TimestampedScoredNetwork timedScore = scoredNetworkCache.get(result.BSSID); |
| if (timedScore == null) { |
| return AccessPoint.Speed.NONE; |
| } |
| // For debugging purposes we may want to use mRssi rather than result.level as the average |
| // speed wil be determined by mRssi |
| return timedScore.getScore().calculateBadge(result.level); |
| } |
| } |