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The Android Open Source Project
2009-03-03 18:28:45 -08:00
parent 4bc9554dcc
commit 6145627639
1 changed files with 0 additions and 212 deletions
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core/java/android/os/NetStat.java
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/*
* Copyright (C) 2007 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.os;
import android.util.Log;
import java.io.File;
import java.io.RandomAccessFile;
import java.io.IOException;
/** @hide */
public class NetStat{
/**
* Get total number of tx packets sent through rmnet0 or ppp0
*
* @return number of Tx packets through rmnet0 or ppp0
*/
public static long getMobileTxPkts() {
return getMobileStat("tx_packets");
}
/**
* Get total number of rx packets received through rmnet0 or ppp0
*
* @return number of Rx packets through rmnet0 or ppp0
*/
public static long getMobileRxPkts() {
return getMobileStat("rx_packets");
}
/**
* Get total number of tx bytes received through rmnet0 or ppp0
*
* @return number of Tx bytes through rmnet0 or ppp0
*/
public static long getMobileTxBytes() {
return getMobileStat("tx_bytes");
}
/**
* Get total number of rx bytes received through rmnet0 or ppp0
*
* @return number of Rx bytes through rmnet0 or ppp0
*/
public static long getMobileRxBytes() {
return getMobileStat("rx_bytes");
}
/**
* Get the total number of packets sent through all network interfaces.
*
* @return the number of packets sent through all network interfaces
*/
public static long getTotalTxPkts() {
return getTotalStat("tx_packets");
}
/**
* Get the total number of packets received through all network interfaces.
*
* @return the number of packets received through all network interfaces
*/
public static long getTotalRxPkts() {
return getTotalStat("rx_packets");
}
/**
* Get the total number of bytes sent through all network interfaces.
*
* @return the number of bytes sent through all network interfaces
*/
public static long getTotalTxBytes() {
return getTotalStat("tx_bytes");
}
/**
* Get the total number of bytes received through all network interfaces.
*
* @return the number of bytes received through all network interfaces
*/
public static long getTotalRxBytes() {
return getTotalStat("rx_bytes");
}
/**
* Gets network bytes sent for this UID.
* The statistics are across all interfaces.
* The statistics come from /proc/uid_stat.
*
* {@see android.os.Process#myUid()}.
*
* @param uid
* @return byte count
*/
public static long getUidTxBytes(int uid) {
return getNumberFromFilePath("/proc/uid_stat/" + uid + "/tcp_snd");
}
/**
* Gets network bytes received for this UID.
* The statistics are across all interfaces.
* The statistics come from /proc/uid_stat.
*
* {@see android.os.Process#myUid()}.
*
* @param uid
* @return byte count
*/
public static long getUidRxBytes(int uid) {
return getNumberFromFilePath("/proc/uid_stat/" + uid + "/tcp_rcv");
}
private static String TAG = "netstat";
private static final byte[] buf = new byte[16];
private static long getTotalStat(String whatStat) {
File netdir = new File("/sys/class/net");
File[] nets = netdir.listFiles();
if (nets == null) {
return 0;
}
long total = 0;
StringBuffer strbuf = new StringBuffer();
for (File net : nets) {
strbuf.append(net.getPath()).append(File.separator).append("statistics")
.append(File.separator).append(whatStat);
total += getNumberFromFilePath(strbuf.toString());
strbuf.setLength(0);
}
return total;
}
private static long getMobileStat(String whatStat) {
String filename = "/sys/class/net/rmnet0/statistics/" + whatStat;
RandomAccessFile raf = getFile(filename);
if (raf == null) {
filename = "/sys/class/net/ppp0/statistics/" + whatStat;
raf = getFile(filename);
}
if (raf == null) {
return 0L;
}
return getNumberFromFile(raf, filename);
}
// File will have format <number><newline>
private static long getNumberFromFilePath(String filename) {
RandomAccessFile raf = getFile(filename);
if (raf == null) {
return 0L;
}
return getNumberFromFile(raf, filename);
}
private static synchronized long getNumberFromFile(RandomAccessFile raf, String filename) {
try {
raf.read(buf);
raf.close();
} catch (IOException e) {
Log.w(TAG, "Exception getting TCP bytes from " + filename, e);
return 0L;
} finally {
if (raf != null) {
try {
raf.close();
} catch (IOException e) {
Log.w(TAG, "Exception closing " + filename, e);
}
}
}
long num = 0L;
for (int i = 0; i < buf.length; i++) {
if (buf[i] < '0' || buf[i] > '9') {
break;
}
num *= 10;
num += buf[i] - '0';
}
return num;
}
private static RandomAccessFile getFile(String filename) {
File f = new File(filename);
if (!f.canRead()) {
return null;
}
try {
return new RandomAccessFile(f, "r");
} catch (IOException e) {
Log.w(TAG, "Exception opening TCP statistics file " + filename, e);
return null;
}
}
}