Return NetworkStats bundle from NM service.
Introduce NetworkStats which is a collection of network statistics,
which should match the structure communicated by kernel module through
netd. Will introduce tags and fg/bg stats later. Kept entirely in a
flat data structure to optimize parcel speed.
Initial pass at returning NetworkStats from NetworkManagementService,
both summary and details. Will eventually pull data from kernel module
over netd connection.
Change-Id: I92d9f61678ec8c22e2ce26775fb035a0cf32413f
diff --git a/core/java/android/net/NetworkStats.aidl b/core/java/android/net/NetworkStats.aidl
new file mode 100644
index 0000000..d06ca65
--- /dev/null
+++ b/core/java/android/net/NetworkStats.aidl
@@ -0,0 +1,19 @@
+/**
+ * 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;
+
+parcelable NetworkStats;
diff --git a/core/java/android/net/NetworkStats.java b/core/java/android/net/NetworkStats.java
new file mode 100644
index 0000000..4430e00
--- /dev/null
+++ b/core/java/android/net/NetworkStats.java
@@ -0,0 +1,158 @@
+/*
+ * 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 java.io.CharArrayWriter;
+import java.io.PrintWriter;
+
+/**
+ * Collection of network statistics. Can contain summary details across all
+ * interfaces, or details with per-UID granularity. Designed to parcel quickly
+ * across process boundaries.
+ *
+ * @hide
+ */
+public class NetworkStats implements Parcelable {
+ /** {@link #iface} value when entry is summarized over all interfaces. */
+ public static final String IFACE_ALL = null;
+ /** {@link #uid} value when entry is summarized over all UIDs. */
+ public static final int UID_ALL = 0;
+
+ /**
+ * {@link SystemClock#elapsedRealtime()} timestamp when this data was
+ * generated.
+ */
+ public final long elapsedRealtime;
+ public final String[] iface;
+ public final int[] uid;
+ public final long[] rx;
+ public final long[] tx;
+
+ // TODO: add fg/bg stats and tag granularity
+
+ private NetworkStats(long elapsedRealtime, String[] iface, int[] uid, long[] rx, long[] tx) {
+ this.elapsedRealtime = elapsedRealtime;
+ this.iface = iface;
+ this.uid = uid;
+ this.rx = rx;
+ this.tx = tx;
+ }
+
+ public NetworkStats(Parcel parcel) {
+ elapsedRealtime = parcel.readLong();
+ iface = parcel.createStringArray();
+ uid = parcel.createIntArray();
+ rx = parcel.createLongArray();
+ tx = parcel.createLongArray();
+ }
+
+ public static class Builder {
+ private long mElapsedRealtime;
+ private final String[] mIface;
+ private final int[] mUid;
+ private final long[] mRx;
+ private final long[] mTx;
+
+ private int mIndex = 0;
+
+ public Builder(long elapsedRealtime, int size) {
+ mElapsedRealtime = elapsedRealtime;
+ mIface = new String[size];
+ mUid = new int[size];
+ mRx = new long[size];
+ mTx = new long[size];
+ }
+
+ public void addEntry(String iface, int uid, long rx, long tx) {
+ mIface[mIndex] = iface;
+ mUid[mIndex] = uid;
+ mRx[mIndex] = rx;
+ mTx[mIndex] = tx;
+ mIndex++;
+ }
+
+ public NetworkStats build() {
+ if (mIndex != mIface.length) {
+ throw new IllegalArgumentException("unexpected number of entries");
+ }
+ return new NetworkStats(mElapsedRealtime, mIface, mUid, mRx, mTx);
+ }
+ }
+
+ /**
+ * Find first stats index that matches the requested parameters.
+ */
+ public int findIndex(String iface, int uid) {
+ for (int i = 0; i < this.iface.length; i++) {
+ if (equal(iface, this.iface[i]) && uid == this.uid[i]) {
+ return i;
+ }
+ }
+ return -1;
+ }
+
+ private static boolean equal(Object a, Object b) {
+ return a == b || (a != null && a.equals(b));
+ }
+
+ /** {@inheritDoc} */
+ public int describeContents() {
+ return 0;
+ }
+
+ public void dump(String prefix, PrintWriter pw) {
+ pw.print(prefix);
+ pw.print("NetworkStats: elapsedRealtime="); pw.println(elapsedRealtime);
+ for (int i = 0; i < iface.length; i++) {
+ pw.print(prefix);
+ pw.print(" iface="); pw.print(iface[i]);
+ pw.print(" uid="); pw.print(uid[i]);
+ pw.print(" rx="); pw.print(rx[i]);
+ pw.print(" tx="); pw.println(tx[i]);
+ }
+ }
+
+ @Override
+ public String toString() {
+ final CharArrayWriter writer = new CharArrayWriter();
+ dump("", new PrintWriter(writer));
+ return writer.toString();
+ }
+
+ /** {@inheritDoc} */
+ public void writeToParcel(Parcel dest, int flags) {
+ dest.writeLong(elapsedRealtime);
+ dest.writeStringArray(iface);
+ dest.writeIntArray(uid);
+ dest.writeLongArray(rx);
+ dest.writeLongArray(tx);
+ }
+
+ 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];
+ }
+ };
+}