Move WifiLinkLayerStats out of frameworks/base (6c630263) · Commits · e / os / android_frameworks_base

wifi/java/android/net/wifi/WifiInfo.java

+6 −145

Original line number	Diff line number	Diff line
		@@ -22,7 +22,6 @@ import android.net.NetworkInfo.DetailedState;
		import android.net.NetworkUtils;
		import android.text.TextUtils;

		import java.lang.Math;
		import java.net.InetAddress;
		import java.net.Inet4Address;
		import java.net.UnknownHostException;
		@@ -126,139 +125,31 @@ public class WifiInfo implements Parcelable {
		public long rxSuccess;

		/**
		* Average rate of lost transmitted packets, in units of packets per 5 seconds.
		* Average rate of lost transmitted packets, in units of packets per second.
		* @hide
		*/
		public double txBadRate;
		/**
		* Average rate of transmitted retry packets, in units of packets per 5 seconds.
		* Average rate of transmitted retry packets, in units of packets per second.
		* @hide
		*/
		public double txRetriesRate;
		/**
		* Average rate of successfully transmitted unicast packets, in units of packets per 5 seconds.
		* Average rate of successfully transmitted unicast packets, in units of packets per second.
		* @hide
		*/
		public double txSuccessRate;
		/**
		* Average rate of received unicast data packets, in units of packets per 5 seconds.
		* Average rate of received unicast data packets, in units of packets per second.
		* @hide
		*/
		public double rxSuccessRate;

		private static final long RESET_TIME_STAMP = Long.MIN_VALUE;
		private static final long FILTER_TIME_CONSTANT = 3000;
		/**
		* This factor is used to adjust the rate output under the new algorithm
		* such that the result is comparable to the previous algorithm.
		* This actually converts from unit 'packets per second' to 'packets per 5 seconds'.
		*/
		private static final long OUTPUT_SCALE_FACTOR = 5;
		private long mLastPacketCountUpdateTimeStamp;

		/**
		* @hide
		*/
		public int badRssiCount;

		/**
		* @hide
		*/
		public int linkStuckCount;

		/**
		* @hide
		*/
		public int lowRssiCount;

		/**
		* @hide
		*/
		public int score;

		/**
		* @hide
		*/
		public void updatePacketRates(WifiLinkLayerStats stats, long timeStamp) {
		if (stats != null) {
		long txgood = stats.txmpdu_be + stats.txmpdu_bk + stats.txmpdu_vi + stats.txmpdu_vo;
		long txretries = stats.retries_be + stats.retries_bk
		+ stats.retries_vi + stats.retries_vo;
		long rxgood = stats.rxmpdu_be + stats.rxmpdu_bk + stats.rxmpdu_vi + stats.rxmpdu_vo;
		long txbad = stats.lostmpdu_be + stats.lostmpdu_bk
		+ stats.lostmpdu_vi + stats.lostmpdu_vo;

		if (mLastPacketCountUpdateTimeStamp != RESET_TIME_STAMP
		&& mLastPacketCountUpdateTimeStamp < timeStamp
		&& txBad <= txbad
		&& txSuccess <= txgood
		&& rxSuccess <= rxgood
		&& txRetries <= txretries) {
		long timeDelta = timeStamp - mLastPacketCountUpdateTimeStamp;
		double lastSampleWeight = Math.exp(-1.0 * timeDelta / FILTER_TIME_CONSTANT);
		double currentSampleWeight = 1.0 - lastSampleWeight;

		txBadRate = txBadRate * lastSampleWeight
		+ (txbad - txBad) * OUTPUT_SCALE_FACTOR * 1000 / timeDelta
		* currentSampleWeight;
		txSuccessRate = txSuccessRate * lastSampleWeight
		+ (txgood - txSuccess) * OUTPUT_SCALE_FACTOR * 1000 / timeDelta
		* currentSampleWeight;
		rxSuccessRate = rxSuccessRate * lastSampleWeight
		+ (rxgood - rxSuccess) * OUTPUT_SCALE_FACTOR * 1000 / timeDelta
		* currentSampleWeight;
		txRetriesRate = txRetriesRate * lastSampleWeight
		+ (txretries - txRetries) * OUTPUT_SCALE_FACTOR * 1000/ timeDelta
		* currentSampleWeight;
		} else {
		txBadRate = 0;
		txSuccessRate = 0;
		rxSuccessRate = 0;
		txRetriesRate = 0;
		}
		txBad = txbad;
		txSuccess = txgood;
		rxSuccess = rxgood;
		txRetries = txretries;
		mLastPacketCountUpdateTimeStamp = timeStamp;
		} else {
		txBad = 0;
		txSuccess = 0;
		rxSuccess = 0;
		txRetries = 0;
		txBadRate = 0;
		txSuccessRate = 0;
		rxSuccessRate = 0;
		txRetriesRate = 0;
		mLastPacketCountUpdateTimeStamp = RESET_TIME_STAMP;
		}
		}


		/**
		* This function is less powerful and used if the WifiLinkLayerStats API is not implemented
		* at the Wifi HAL
		* @hide
		*/
		public void updatePacketRates(long txPackets, long rxPackets) {
		//paranoia
		txBad = 0;
		txRetries = 0;
		txBadRate = 0;
		txRetriesRate = 0;
		if (txSuccess <= txPackets && rxSuccess <= rxPackets) {
		txSuccessRate = (txSuccessRate * 0.5)
		+ ((double) (txPackets - txSuccess) * 0.5);
		rxSuccessRate = (rxSuccessRate * 0.5)
		+ ((double) (rxPackets - rxSuccess) * 0.5);
		} else {
		txBadRate = 0;
		txRetriesRate = 0;
		}
		txSuccess = txPackets;
		rxSuccess = rxPackets;
		}

		/**
		* Flag indicating that AP has hinted that upstream connection is metered,
		* and sensitive to heavy data transfers.
		@@ -274,7 +165,6 @@ public class WifiInfo implements Parcelable {
		mRssi = INVALID_RSSI;
		mLinkSpeed = -1;
		mFrequency = -1;
		mLastPacketCountUpdateTimeStamp = RESET_TIME_STAMP;
		}

		/** @hide */
		@@ -296,11 +186,7 @@ public class WifiInfo implements Parcelable {
		txSuccessRate = 0;
		rxSuccessRate = 0;
		txRetriesRate = 0;
		lowRssiCount = 0;
		badRssiCount = 0;
		linkStuckCount = 0;
		score = 0;
		mLastPacketCountUpdateTimeStamp = RESET_TIME_STAMP;
		}

		/**
		@@ -328,12 +214,7 @@ public class WifiInfo implements Parcelable {
		txRetriesRate = source.txRetriesRate;
		txSuccessRate = source.txSuccessRate;
		rxSuccessRate = source.rxSuccessRate;
		mLastPacketCountUpdateTimeStamp =
		source.mLastPacketCountUpdateTimeStamp;
		score = source.score;
		badRssiCount = source.badRssiCount;
		lowRssiCount = source.lowRssiCount;
		linkStuckCount = source.linkStuckCount;
		}
		}

		@@ -451,22 +332,6 @@ public class WifiInfo implements Parcelable {
		return ScanResult.is5GHz(mFrequency);
		}

		/**
		* @hide
		* This returns txSuccessRate in packets per second.
		*/
		public double getTxSuccessRatePps() {
		return txSuccessRate / OUTPUT_SCALE_FACTOR;
		}

		/**
		* @hide
		* This returns rxSuccessRate in packets per second.
		*/
		public double getRxSuccessRatePps() {
		return rxSuccessRate / OUTPUT_SCALE_FACTOR;
		}

		/**
		* Record the MAC address of the WLAN interface
		* @param macAddress the MAC address in {@code XX:XX:XX:XX:XX:XX} form
		@@ -658,8 +523,6 @@ public class WifiInfo implements Parcelable {
		dest.writeDouble(txRetriesRate);
		dest.writeDouble(txBadRate);
		dest.writeDouble(rxSuccessRate);
		dest.writeInt(badRssiCount);
		dest.writeInt(lowRssiCount);
		mSupplicantState.writeToParcel(dest, flags);
		}

		@@ -689,8 +552,6 @@ public class WifiInfo implements Parcelable {
		info.txRetriesRate = in.readDouble();
		info.txBadRate = in.readDouble();
		info.rxSuccessRate = in.readDouble();
		info.badRssiCount = in.readInt();
		info.lowRssiCount = in.readInt();
		info.mSupplicantState = SupplicantState.CREATOR.createFromParcel(in);
		return info;
		}

wifi/java/android/net/wifi/WifiLinkLayerStats.java

deleted100644 → 0

+0 −211

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2014 The Android Open Source Project
		*
		* Licensed under the Apache License, Version 2.0 (the "License");
		* you may not use this file except in compliance with the License.
		* You may obtain a copy of the License at
		*
		* http://www.apache.org/licenses/LICENSE-2.0
		*
		* Unless required by applicable law or agreed to in writing, software
		* distributed under the License is distributed on an "AS IS" BASIS,
		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
		* See the License for the specific language governing permissions and
		* limitations under the License.
		*/

		package android.net.wifi;

		import android.os.Parcelable;
		import android.os.Parcel;

		import java.util.Arrays;

		/**
		* A class representing link layer statistics collected over a Wifi Interface.
		*/
		/** {@hide} */
		public class WifiLinkLayerStats implements Parcelable {
		private static final String TAG = "WifiLinkLayerStats";

		/**
		* The current status of this network configuration entry.
		* @see Status
		*/
		/** {@hide} */
		public int status;

		/**
		* The network's SSID. Can either be an ASCII string,
		* which must be enclosed in double quotation marks
		* (e.g., {@code "MyNetwork"}, or a string of
		* hex digits,which are not enclosed in quotes
		* (e.g., {@code 01a243f405}).
		*/
		/** {@hide} */
		public String SSID;
		/**
		* When set. this is the BSSID the radio is currently associated with.
		* The value is a string in the format of an Ethernet MAC address, e.g.,
		* <code>XX:XX:XX:XX:XX:XX</code> where each <code>X</code> is a hex digit.
		*/
		/** {@hide} */
		public String BSSID;

		/* number beacons received from our own AP */
		/** {@hide} */
		public int beacon_rx;

		/* RSSI taken on management frames */
		/** {@hide} */
		public int rssi_mgmt;

		/* packets counters */
		/** {@hide} */
		/* WME Best Effort Access Category (receive mpdu, transmit mpdu, lost mpdu, number of retries)*/
		public long rxmpdu_be;
		/** {@hide} */
		public long txmpdu_be;
		/** {@hide} */
		public long lostmpdu_be;
		/** {@hide} */
		public long retries_be;
		/** {@hide} */
		/* WME Background Access Category (receive mpdu, transmit mpdu, lost mpdu, number of retries) */
		public long rxmpdu_bk;
		/** {@hide} */
		public long txmpdu_bk;
		/** {@hide} */
		public long lostmpdu_bk;
		/** {@hide} */
		public long retries_bk;
		/** {@hide} */
		/* WME Video Access Category (receive mpdu, transmit mpdu, lost mpdu, number of retries) */
		public long rxmpdu_vi;
		/** {@hide} */
		public long txmpdu_vi;
		/** {@hide} */
		public long lostmpdu_vi;
		/** {@hide} */
		public long retries_vi;
		/** {@hide} */
		/* WME Voice Access Category (receive mpdu, transmit mpdu, lost mpdu, number of retries) */
		public long rxmpdu_vo;
		/** {@hide} */
		public long txmpdu_vo;
		/** {@hide} */
		public long lostmpdu_vo;
		/** {@hide} */
		public long retries_vo;

		/** {@hide} */
		public int on_time;
		/** {@hide} */
		public int tx_time;
		/** {@hide} */
		public int[] tx_time_per_level;
		/** {@hide} */
		public int rx_time;
		/** {@hide} */
		public int on_time_scan;

		/** {@hide} */
		public WifiLinkLayerStats() {
		}

		@Override
		/** {@hide} */
		public String toString() {
		StringBuilder sbuf = new StringBuilder();
		sbuf.append(" WifiLinkLayerStats: ").append('\n');

		if (this.SSID != null) {
		sbuf.append(" SSID: ").append(this.SSID).append('\n');
		}
		if (this.BSSID != null) {
		sbuf.append(" BSSID: ").append(this.BSSID).append('\n');
		}

		sbuf.append(" my bss beacon rx: ").append(Integer.toString(this.beacon_rx)).append('\n');
		sbuf.append(" RSSI mgmt: ").append(Integer.toString(this.rssi_mgmt)).append('\n');
		sbuf.append(" BE : ").append(" rx=").append(Long.toString(this.rxmpdu_be))
		.append(" tx=").append(Long.toString(this.txmpdu_be))
		.append(" lost=").append(Long.toString(this.lostmpdu_be))
		.append(" retries=").append(Long.toString(this.retries_be)).append('\n');
		sbuf.append(" BK : ").append(" rx=").append(Long.toString(this.rxmpdu_bk))
		.append(" tx=").append(Long.toString(this.txmpdu_bk))
		.append(" lost=").append(Long.toString(this.lostmpdu_bk))
		.append(" retries=").append(Long.toString(this.retries_bk)).append('\n');
		sbuf.append(" VI : ").append(" rx=").append(Long.toString(this.rxmpdu_vi))
		.append(" tx=").append(Long.toString(this.txmpdu_vi))
		.append(" lost=").append(Long.toString(this.lostmpdu_vi))
		.append(" retries=").append(Long.toString(this.retries_vi)).append('\n');
		sbuf.append(" VO : ").append(" rx=").append(Long.toString(this.rxmpdu_vo))
		.append(" tx=").append(Long.toString(this.txmpdu_vo))
		.append(" lost=").append(Long.toString(this.lostmpdu_vo))
		.append(" retries=").append(Long.toString(this.retries_vo)).append('\n');
		sbuf.append(" on_time : ").append(Integer.toString(this.on_time))
		.append(" rx_time=").append(Integer.toString(this.rx_time))
		.append(" scan_time=").append(Integer.toString(this.on_time_scan)).append('\n')
		.append(" tx_time=").append(Integer.toString(this.tx_time))
		.append(" tx_time_per_level=" + Arrays.toString(tx_time_per_level));
		return sbuf.toString();
		}

		/** Implement the Parcelable interface {@hide} */
		public int describeContents() {
		return 0;
		}

		/** {@hide} */
		public String getPrintableSsid() {
		if (SSID == null) return "";
		final int length = SSID.length();
		if (length > 2 && (SSID.charAt(0) == '"') && SSID.charAt(length - 1) == '"') {
		return SSID.substring(1, length - 1);
		}

		/** The ascii-encoded string format is P"<ascii-encoded-string>"
		* The decoding is implemented in the supplicant for a newly configured
		* network.
		*/
		if (length > 3 && (SSID.charAt(0) == 'P') && (SSID.charAt(1) == '"') &&
		(SSID.charAt(length-1) == '"')) {
		WifiSsid wifiSsid = WifiSsid.createFromAsciiEncoded(
		SSID.substring(2, length - 1));
		return wifiSsid.toString();
		}
		return SSID;
		}

		/** Implement the Parcelable interface {@hide} */
		public void writeToParcel(Parcel dest, int flags) {
		dest.writeString(SSID);
		dest.writeString(BSSID);
		dest.writeInt(on_time);
		dest.writeInt(tx_time);
		dest.writeIntArray(tx_time_per_level);
		dest.writeInt(rx_time);
		dest.writeInt(on_time_scan);
		}

		/** Implement the Parcelable interface {@hide} */
		public static final Creator<WifiLinkLayerStats> CREATOR =
		new Creator<WifiLinkLayerStats>() {
		public WifiLinkLayerStats createFromParcel(Parcel in) {
		WifiLinkLayerStats stats = new WifiLinkLayerStats();
		stats.SSID = in.readString();
		stats.BSSID = in.readString();
		stats.on_time = in.readInt();
		stats.tx_time = in.readInt();
		stats.tx_time_per_level = in.createIntArray();
		stats.rx_time = in.readInt();
		stats.on_time_scan = in.readInt();
		return stats;
		};
		public WifiLinkLayerStats[] newArray(int size) {
		return new WifiLinkLayerStats[size];
		}

		};
		}