| /* |
| * Copyright (C) 2011 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; |
| |
| import android.os.Parcel; |
| import android.os.Parcelable; |
| import android.os.SystemClock; |
| import android.util.Log; |
| import android.util.SparseBooleanArray; |
| |
| import com.android.internal.util.Objects; |
| |
| import java.io.CharArrayWriter; |
| import java.io.PrintWriter; |
| import java.util.Arrays; |
| import java.util.HashSet; |
| |
| /** |
| * Collection of active network statistics. Can contain summary details across |
| * all interfaces, or details with per-UID granularity. Internally stores data |
| * as a large table, closely matching {@code /proc/} data format. This structure |
| * optimizes for rapid in-memory comparison, but consider using |
| * {@link NetworkStatsHistory} when persisting. |
| * |
| * @hide |
| */ |
| public class NetworkStats implements Parcelable { |
| private static final String TAG = "NetworkStats"; |
| |
| /** {@link #iface} value when interface details unavailable. */ |
| public static final String IFACE_ALL = null; |
| /** {@link #uid} value when UID details unavailable. */ |
| public static final int UID_ALL = -1; |
| /** {@link #set} value when all sets combined. */ |
| public static final int SET_ALL = -1; |
| /** {@link #set} value where background data is accounted. */ |
| public static final int SET_DEFAULT = 0; |
| /** {@link #set} value where foreground data is accounted. */ |
| public static final int SET_FOREGROUND = 1; |
| /** {@link #tag} value for total data across all tags. */ |
| public static final int TAG_NONE = 0; |
| |
| /** |
| * {@link SystemClock#elapsedRealtime()} timestamp when this data was |
| * generated. |
| */ |
| private final long elapsedRealtime; |
| private int size; |
| private String[] iface; |
| private int[] uid; |
| private int[] set; |
| private int[] tag; |
| private long[] rxBytes; |
| private long[] rxPackets; |
| private long[] txBytes; |
| private long[] txPackets; |
| private long[] operations; |
| |
| public static class Entry { |
| public String iface; |
| public int uid; |
| public int set; |
| public int tag; |
| public long rxBytes; |
| public long rxPackets; |
| public long txBytes; |
| public long txPackets; |
| public long operations; |
| |
| public Entry() { |
| this(IFACE_ALL, UID_ALL, SET_DEFAULT, TAG_NONE, 0L, 0L, 0L, 0L, 0L); |
| } |
| |
| public Entry(long rxBytes, long rxPackets, long txBytes, long txPackets, long operations) { |
| this(IFACE_ALL, UID_ALL, SET_DEFAULT, TAG_NONE, rxBytes, rxPackets, txBytes, txPackets, |
| operations); |
| } |
| |
| public Entry(String iface, int uid, int set, int tag, long rxBytes, long rxPackets, |
| long txBytes, long txPackets, long operations) { |
| this.iface = iface; |
| this.uid = uid; |
| this.set = set; |
| this.tag = tag; |
| this.rxBytes = rxBytes; |
| this.rxPackets = rxPackets; |
| this.txBytes = txBytes; |
| this.txPackets = txPackets; |
| this.operations = operations; |
| } |
| |
| @Override |
| public String toString() { |
| final StringBuilder builder = new StringBuilder(); |
| builder.append("iface=").append(iface); |
| builder.append(" uid=").append(uid); |
| builder.append(" set=").append(setToString(set)); |
| builder.append(" tag=").append(tagToString(tag)); |
| builder.append(" rxBytes=").append(rxBytes); |
| builder.append(" rxPackets=").append(rxPackets); |
| builder.append(" txBytes=").append(txBytes); |
| builder.append(" txPackets=").append(txPackets); |
| builder.append(" operations=").append(operations); |
| return builder.toString(); |
| } |
| } |
| |
| public NetworkStats(long elapsedRealtime, int initialSize) { |
| this.elapsedRealtime = elapsedRealtime; |
| this.size = 0; |
| this.iface = new String[initialSize]; |
| this.uid = new int[initialSize]; |
| this.set = new int[initialSize]; |
| this.tag = new int[initialSize]; |
| this.rxBytes = new long[initialSize]; |
| this.rxPackets = new long[initialSize]; |
| this.txBytes = new long[initialSize]; |
| this.txPackets = new long[initialSize]; |
| this.operations = new long[initialSize]; |
| } |
| |
| public NetworkStats(Parcel parcel) { |
| elapsedRealtime = parcel.readLong(); |
| size = parcel.readInt(); |
| iface = parcel.createStringArray(); |
| uid = parcel.createIntArray(); |
| set = parcel.createIntArray(); |
| tag = parcel.createIntArray(); |
| rxBytes = parcel.createLongArray(); |
| rxPackets = parcel.createLongArray(); |
| txBytes = parcel.createLongArray(); |
| txPackets = parcel.createLongArray(); |
| operations = parcel.createLongArray(); |
| } |
| |
| /** {@inheritDoc} */ |
| public void writeToParcel(Parcel dest, int flags) { |
| dest.writeLong(elapsedRealtime); |
| dest.writeInt(size); |
| dest.writeStringArray(iface); |
| dest.writeIntArray(uid); |
| dest.writeIntArray(set); |
| dest.writeIntArray(tag); |
| dest.writeLongArray(rxBytes); |
| dest.writeLongArray(rxPackets); |
| dest.writeLongArray(txBytes); |
| dest.writeLongArray(txPackets); |
| dest.writeLongArray(operations); |
| } |
| |
| // @VisibleForTesting |
| public NetworkStats addIfaceValues( |
| String iface, long rxBytes, long rxPackets, long txBytes, long txPackets) { |
| return addValues( |
| iface, UID_ALL, SET_DEFAULT, TAG_NONE, rxBytes, rxPackets, txBytes, txPackets, 0L); |
| } |
| |
| // @VisibleForTesting |
| public NetworkStats addValues(String iface, int uid, int set, int tag, long rxBytes, |
| long rxPackets, long txBytes, long txPackets, long operations) { |
| return addValues(new Entry( |
| iface, uid, set, tag, rxBytes, rxPackets, txBytes, txPackets, operations)); |
| } |
| |
| /** |
| * Add new stats entry, copying from given {@link Entry}. The {@link Entry} |
| * object can be recycled across multiple calls. |
| */ |
| public NetworkStats addValues(Entry entry) { |
| if (size >= this.iface.length) { |
| final int newLength = Math.max(iface.length, 10) * 3 / 2; |
| iface = Arrays.copyOf(iface, newLength); |
| uid = Arrays.copyOf(uid, newLength); |
| set = Arrays.copyOf(set, newLength); |
| tag = Arrays.copyOf(tag, newLength); |
| rxBytes = Arrays.copyOf(rxBytes, newLength); |
| rxPackets = Arrays.copyOf(rxPackets, newLength); |
| txBytes = Arrays.copyOf(txBytes, newLength); |
| txPackets = Arrays.copyOf(txPackets, newLength); |
| operations = Arrays.copyOf(operations, newLength); |
| } |
| |
| iface[size] = entry.iface; |
| uid[size] = entry.uid; |
| set[size] = entry.set; |
| tag[size] = entry.tag; |
| rxBytes[size] = entry.rxBytes; |
| rxPackets[size] = entry.rxPackets; |
| txBytes[size] = entry.txBytes; |
| txPackets[size] = entry.txPackets; |
| operations[size] = entry.operations; |
| size++; |
| |
| return this; |
| } |
| |
| /** |
| * Return specific stats entry. |
| */ |
| public Entry getValues(int i, Entry recycle) { |
| final Entry entry = recycle != null ? recycle : new Entry(); |
| entry.iface = iface[i]; |
| entry.uid = uid[i]; |
| entry.set = set[i]; |
| entry.tag = tag[i]; |
| entry.rxBytes = rxBytes[i]; |
| entry.rxPackets = rxPackets[i]; |
| entry.txBytes = txBytes[i]; |
| entry.txPackets = txPackets[i]; |
| entry.operations = operations[i]; |
| return entry; |
| } |
| |
| public long getElapsedRealtime() { |
| return elapsedRealtime; |
| } |
| |
| public int size() { |
| return size; |
| } |
| |
| // @VisibleForTesting |
| public int internalSize() { |
| return iface.length; |
| } |
| |
| @Deprecated |
| public NetworkStats combineValues(String iface, int uid, int tag, long rxBytes, long rxPackets, |
| long txBytes, long txPackets, long operations) { |
| return combineValues( |
| iface, uid, SET_DEFAULT, tag, rxBytes, rxPackets, txBytes, txPackets, operations); |
| } |
| |
| public NetworkStats combineValues(String iface, int uid, int set, int tag, long rxBytes, |
| long rxPackets, long txBytes, long txPackets, long operations) { |
| return combineValues(new Entry( |
| iface, uid, set, tag, rxBytes, rxPackets, txBytes, txPackets, operations)); |
| } |
| |
| /** |
| * Combine given values with an existing row, or create a new row if |
| * {@link #findIndex(String, int, int, int)} is unable to find match. Can |
| * also be used to subtract values from existing rows. |
| */ |
| public NetworkStats combineValues(Entry entry) { |
| final int i = findIndex(entry.iface, entry.uid, entry.set, entry.tag); |
| if (i == -1) { |
| // only create new entry when positive contribution |
| addValues(entry); |
| } else { |
| rxBytes[i] += entry.rxBytes; |
| rxPackets[i] += entry.rxPackets; |
| txBytes[i] += entry.txBytes; |
| txPackets[i] += entry.txPackets; |
| operations[i] += entry.operations; |
| } |
| return this; |
| } |
| |
| /** |
| * Combine all values from another {@link NetworkStats} into this object. |
| */ |
| public void combineAllValues(NetworkStats another) { |
| NetworkStats.Entry entry = null; |
| for (int i = 0; i < another.size; i++) { |
| entry = another.getValues(i, entry); |
| combineValues(entry); |
| } |
| } |
| |
| /** |
| * Find first stats index that matches the requested parameters. |
| */ |
| public int findIndex(String iface, int uid, int set, int tag) { |
| for (int i = 0; i < size; i++) { |
| if (Objects.equal(iface, this.iface[i]) && uid == this.uid[i] && set == this.set[i] |
| && tag == this.tag[i]) { |
| return i; |
| } |
| } |
| return -1; |
| } |
| |
| /** |
| * Splice in {@link #operations} from the given {@link NetworkStats} based |
| * on matching {@link #uid} and {@link #tag} rows. Ignores {@link #iface}, |
| * since operation counts are at data layer. |
| */ |
| public void spliceOperationsFrom(NetworkStats stats) { |
| for (int i = 0; i < size; i++) { |
| final int j = stats.findIndex(IFACE_ALL, uid[i], set[i], tag[i]); |
| if (j == -1) { |
| operations[i] = 0; |
| } else { |
| operations[i] = stats.operations[j]; |
| } |
| } |
| } |
| |
| /** |
| * Return list of unique interfaces known by this data structure. |
| */ |
| public String[] getUniqueIfaces() { |
| final HashSet<String> ifaces = new HashSet<String>(); |
| for (String iface : this.iface) { |
| if (iface != IFACE_ALL) { |
| ifaces.add(iface); |
| } |
| } |
| return ifaces.toArray(new String[ifaces.size()]); |
| } |
| |
| /** |
| * Return list of unique UIDs known by this data structure. |
| */ |
| public int[] getUniqueUids() { |
| final SparseBooleanArray uids = new SparseBooleanArray(); |
| for (int uid : this.uid) { |
| uids.put(uid, true); |
| } |
| |
| final int size = uids.size(); |
| final int[] result = new int[size]; |
| for (int i = 0; i < size; i++) { |
| result[i] = uids.keyAt(i); |
| } |
| return result; |
| } |
| |
| /** |
| * Return total bytes represented by this snapshot object, usually used when |
| * checking if a {@link #subtract(NetworkStats)} delta passes a threshold. |
| */ |
| public long getTotalBytes() { |
| final Entry entry = getTotal(null); |
| return entry.rxBytes + entry.txBytes; |
| } |
| |
| /** |
| * Return total of all fields represented by this snapshot object. |
| */ |
| public Entry getTotal(Entry recycle) { |
| final Entry entry = recycle != null ? recycle : new Entry(); |
| |
| entry.iface = IFACE_ALL; |
| entry.uid = UID_ALL; |
| entry.set = SET_ALL; |
| entry.tag = TAG_NONE; |
| entry.rxBytes = 0; |
| entry.rxPackets = 0; |
| entry.txBytes = 0; |
| entry.txPackets = 0; |
| |
| for (int i = 0; i < size; i++) { |
| // skip specific tags, since already counted in TAG_NONE |
| if (tag[i] != TAG_NONE) continue; |
| |
| entry.rxBytes += rxBytes[i]; |
| entry.rxPackets += rxPackets[i]; |
| entry.txBytes += txBytes[i]; |
| entry.txPackets += txPackets[i]; |
| entry.operations += operations[i]; |
| } |
| return entry; |
| } |
| |
| /** |
| * Subtract the given {@link NetworkStats}, effectively leaving the delta |
| * between two snapshots in time. Assumes that statistics rows collect over |
| * time, and that none of them have disappeared. |
| * |
| * @throws IllegalArgumentException when given {@link NetworkStats} is |
| * non-monotonic. |
| */ |
| public NetworkStats subtract(NetworkStats value) { |
| return subtract(value, true, false); |
| } |
| |
| /** |
| * Subtract the given {@link NetworkStats}, effectively leaving the delta |
| * between two snapshots in time. Assumes that statistics rows collect over |
| * time, and that none of them have disappeared. |
| * <p> |
| * Instead of throwing when counters are non-monotonic, this variant clamps |
| * results to never be negative. |
| */ |
| public NetworkStats subtractClamped(NetworkStats value) { |
| return subtract(value, false, true); |
| } |
| |
| /** |
| * Subtract the given {@link NetworkStats}, effectively leaving the delta |
| * between two snapshots in time. Assumes that statistics rows collect over |
| * time, and that none of them have disappeared. |
| * |
| * @param enforceMonotonic Validate that incoming value is strictly |
| * monotonic compared to this object. |
| * @param clampNegative Instead of throwing like {@code enforceMonotonic}, |
| * clamp resulting counters at 0 to prevent negative values. |
| */ |
| private NetworkStats subtract( |
| NetworkStats value, boolean enforceMonotonic, boolean clampNegative) { |
| final long deltaRealtime = this.elapsedRealtime - value.elapsedRealtime; |
| if (enforceMonotonic && deltaRealtime < 0) { |
| throw new IllegalArgumentException("found non-monotonic realtime"); |
| } |
| |
| // result will have our rows, and elapsed time between snapshots |
| final Entry entry = new Entry(); |
| final NetworkStats result = new NetworkStats(deltaRealtime, size); |
| for (int i = 0; i < size; i++) { |
| entry.iface = iface[i]; |
| entry.uid = uid[i]; |
| entry.set = set[i]; |
| entry.tag = tag[i]; |
| |
| // find remote row that matches, and subtract |
| final int j = value.findIndex(entry.iface, entry.uid, entry.set, entry.tag); |
| if (j == -1) { |
| // newly appearing row, return entire value |
| entry.rxBytes = rxBytes[i]; |
| entry.rxPackets = rxPackets[i]; |
| entry.txBytes = txBytes[i]; |
| entry.txPackets = txPackets[i]; |
| entry.operations = operations[i]; |
| } else { |
| // existing row, subtract remote value |
| entry.rxBytes = rxBytes[i] - value.rxBytes[j]; |
| entry.rxPackets = rxPackets[i] - value.rxPackets[j]; |
| entry.txBytes = txBytes[i] - value.txBytes[j]; |
| entry.txPackets = txPackets[i] - value.txPackets[j]; |
| entry.operations = operations[i] - value.operations[j]; |
| if (enforceMonotonic |
| && (entry.rxBytes < 0 || entry.rxPackets < 0 || entry.txBytes < 0 |
| || entry.txPackets < 0 || entry.operations < 0)) { |
| Log.v(TAG, "lhs=" + this); |
| Log.v(TAG, "rhs=" + value); |
| throw new IllegalArgumentException( |
| "found non-monotonic values at lhs[" + i + "] - rhs[" + j + "]"); |
| } |
| if (clampNegative) { |
| entry.rxBytes = Math.max(0, entry.rxBytes); |
| entry.rxPackets = Math.max(0, entry.rxPackets); |
| entry.txBytes = Math.max(0, entry.txBytes); |
| entry.txPackets = Math.max(0, entry.txPackets); |
| entry.operations = Math.max(0, entry.operations); |
| } |
| } |
| |
| result.addValues(entry); |
| } |
| |
| return result; |
| } |
| |
| /** |
| * Return total statistics grouped by {@link #iface}; doesn't mutate the |
| * original structure. |
| */ |
| public NetworkStats groupedByIface() { |
| final NetworkStats stats = new NetworkStats(elapsedRealtime, 10); |
| |
| final Entry entry = new Entry(); |
| entry.uid = UID_ALL; |
| entry.set = SET_ALL; |
| entry.tag = TAG_NONE; |
| entry.operations = 0L; |
| |
| for (int i = 0; i < size; i++) { |
| // skip specific tags, since already counted in TAG_NONE |
| if (tag[i] != TAG_NONE) continue; |
| |
| entry.iface = iface[i]; |
| entry.rxBytes = rxBytes[i]; |
| entry.rxPackets = rxPackets[i]; |
| entry.txBytes = txBytes[i]; |
| entry.txPackets = txPackets[i]; |
| stats.combineValues(entry); |
| } |
| |
| return stats; |
| } |
| |
| public void dump(String prefix, PrintWriter pw) { |
| pw.print(prefix); |
| pw.print("NetworkStats: elapsedRealtime="); pw.println(elapsedRealtime); |
| for (int i = 0; i < size; i++) { |
| pw.print(prefix); |
| pw.print(" iface="); pw.print(iface[i]); |
| pw.print(" uid="); pw.print(uid[i]); |
| pw.print(" set="); pw.print(setToString(set[i])); |
| pw.print(" tag="); pw.print(tagToString(tag[i])); |
| pw.print(" rxBytes="); pw.print(rxBytes[i]); |
| pw.print(" rxPackets="); pw.print(rxPackets[i]); |
| pw.print(" txBytes="); pw.print(txBytes[i]); |
| pw.print(" txPackets="); pw.print(txPackets[i]); |
| pw.print(" operations="); pw.println(operations[i]); |
| } |
| } |
| |
| /** |
| * Return text description of {@link #set} value. |
| */ |
| public static String setToString(int set) { |
| switch (set) { |
| case SET_ALL: |
| return "ALL"; |
| case SET_DEFAULT: |
| return "DEFAULT"; |
| case SET_FOREGROUND: |
| return "FOREGROUND"; |
| default: |
| return "UNKNOWN"; |
| } |
| } |
| |
| /** |
| * Return text description of {@link #tag} value. |
| */ |
| public static String tagToString(int tag) { |
| return "0x" + Integer.toHexString(tag); |
| } |
| |
| @Override |
| public String toString() { |
| final CharArrayWriter writer = new CharArrayWriter(); |
| dump("", new PrintWriter(writer)); |
| return writer.toString(); |
| } |
| |
| /** {@inheritDoc} */ |
| public int describeContents() { |
| return 0; |
| } |
| |
| public static final Creator<NetworkStats> CREATOR = new Creator<NetworkStats>() { |
| public NetworkStats createFromParcel(Parcel in) { |
| return new NetworkStats(in); |
| } |
| |
| public NetworkStats[] newArray(int size) { |
| return new NetworkStats[size]; |
| } |
| }; |
| } |