| /* |
| * 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 com.android.internal.net; |
| |
| import static android.net.NetworkStats.SET_DEFAULT; |
| import static android.net.NetworkStats.TAG_NONE; |
| import static android.net.NetworkStats.UID_ALL; |
| import static com.android.server.NetworkManagementSocketTagger.kernelToTag; |
| |
| import android.net.NetworkStats; |
| import android.os.SystemClock; |
| import android.util.Slog; |
| |
| import com.google.android.collect.Lists; |
| import com.google.android.collect.Maps; |
| import com.google.android.collect.Sets; |
| |
| import java.io.BufferedReader; |
| import java.io.File; |
| import java.io.FileReader; |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.StringTokenizer; |
| |
| import libcore.io.IoUtils; |
| |
| /** |
| * Creates {@link NetworkStats} instances by parsing various {@code /proc/} |
| * files as needed. |
| */ |
| public class NetworkStatsFactory { |
| private static final String TAG = "NetworkStatsFactory"; |
| |
| // TODO: consider moving parsing to native code |
| |
| /** Path to {@code /proc/net/dev}. */ |
| @Deprecated |
| private final File mStatsIface; |
| /** Path to {@code /proc/net/xt_qtaguid/iface_stat}. */ |
| @Deprecated |
| private final File mStatsXtIface; |
| /** Path to {@code /proc/net/xt_qtaguid/iface_stat_all}. */ |
| private final File mStatsXtIfaceAll; |
| /** Path to {@code /proc/net/xt_qtaguid/stats}. */ |
| private final File mStatsXtUid; |
| |
| /** {@link #mStatsXtUid} and {@link #mStatsXtIfaceAll} headers. */ |
| private static final String KEY_IDX = "idx"; |
| private static final String KEY_IFACE = "iface"; |
| private static final String KEY_ACTIVE = "active"; |
| private static final String KEY_UID = "uid_tag_int"; |
| private static final String KEY_COUNTER_SET = "cnt_set"; |
| private static final String KEY_TAG_HEX = "acct_tag_hex"; |
| private static final String KEY_SNAP_RX_BYTES = "snap_rx_bytes"; |
| private static final String KEY_SNAP_RX_PACKETS = "snap_rx_packets"; |
| private static final String KEY_SNAP_TX_BYTES = "snap_tx_bytes"; |
| private static final String KEY_SNAP_TX_PACKETS = "snap_tx_packets"; |
| private static final String KEY_RX_BYTES = "rx_bytes"; |
| private static final String KEY_RX_PACKETS = "rx_packets"; |
| private static final String KEY_TX_BYTES = "tx_bytes"; |
| private static final String KEY_TX_PACKETS = "tx_packets"; |
| |
| public NetworkStatsFactory() { |
| this(new File("/proc/")); |
| } |
| |
| // @VisibleForTesting |
| public NetworkStatsFactory(File procRoot) { |
| mStatsIface = new File(procRoot, "net/dev"); |
| mStatsXtUid = new File(procRoot, "net/xt_qtaguid/stats"); |
| mStatsXtIface = new File(procRoot, "net/xt_qtaguid/iface_stat"); |
| mStatsXtIfaceAll = new File(procRoot, "net/xt_qtaguid/iface_stat_all"); |
| } |
| |
| /** |
| * Parse and return interface-level summary {@link NetworkStats}. Values |
| * monotonically increase since device boot, and may include details about |
| * inactive interfaces. |
| * |
| * @throws IllegalStateException when problem parsing stats. |
| */ |
| public NetworkStats readNetworkStatsSummary() throws IllegalStateException { |
| if (mStatsXtIfaceAll.exists()) { |
| return readNetworkStatsSummarySingleFile(); |
| } else { |
| return readNetworkStatsSummaryMultipleFiles(); |
| } |
| } |
| |
| private NetworkStats readNetworkStatsSummarySingleFile() { |
| final NetworkStats stats = new NetworkStats(SystemClock.elapsedRealtime(), 6); |
| final NetworkStats.Entry entry = new NetworkStats.Entry(); |
| |
| // TODO: read directly from proc once headers are added |
| final ArrayList<String> keys = Lists.newArrayList(KEY_IFACE, KEY_ACTIVE, KEY_SNAP_RX_BYTES, |
| KEY_SNAP_RX_PACKETS, KEY_SNAP_TX_BYTES, KEY_SNAP_TX_PACKETS, KEY_RX_BYTES, |
| KEY_RX_PACKETS, KEY_TX_BYTES, KEY_TX_PACKETS); |
| final ArrayList<String> values = Lists.newArrayList(); |
| final HashMap<String, String> parsed = Maps.newHashMap(); |
| |
| BufferedReader reader = null; |
| try { |
| reader = new BufferedReader(new FileReader(mStatsXtIfaceAll)); |
| |
| String line; |
| while ((line = reader.readLine()) != null) { |
| splitLine(line, values); |
| parseLine(keys, values, parsed); |
| |
| entry.iface = parsed.get(KEY_IFACE); |
| entry.uid = UID_ALL; |
| entry.set = SET_DEFAULT; |
| entry.tag = TAG_NONE; |
| |
| // always include snapshot values |
| entry.rxBytes = getParsedLong(parsed, KEY_SNAP_RX_BYTES); |
| entry.rxPackets = getParsedLong(parsed, KEY_SNAP_RX_PACKETS); |
| entry.txBytes = getParsedLong(parsed, KEY_SNAP_TX_BYTES); |
| entry.txPackets = getParsedLong(parsed, KEY_SNAP_TX_PACKETS); |
| |
| // fold in active numbers, but only when active |
| final boolean active = getParsedInt(parsed, KEY_ACTIVE) != 0; |
| if (active) { |
| entry.rxBytes += getParsedLong(parsed, KEY_RX_BYTES); |
| entry.rxPackets += getParsedLong(parsed, KEY_RX_PACKETS); |
| entry.txBytes += getParsedLong(parsed, KEY_TX_BYTES); |
| entry.txPackets += getParsedLong(parsed, KEY_TX_PACKETS); |
| } |
| |
| stats.addValues(entry); |
| } |
| } catch (NullPointerException e) { |
| throw new IllegalStateException("problem parsing stats: " + e); |
| } catch (NumberFormatException e) { |
| throw new IllegalStateException("problem parsing stats: " + e); |
| } catch (IOException e) { |
| throw new IllegalStateException("problem parsing stats: " + e); |
| } finally { |
| IoUtils.closeQuietly(reader); |
| } |
| return stats; |
| } |
| |
| /** |
| * @deprecated remove once {@code iface_stat_all} is merged to all kernels. |
| */ |
| @Deprecated |
| private NetworkStats readNetworkStatsSummaryMultipleFiles() { |
| final NetworkStats stats = new NetworkStats(SystemClock.elapsedRealtime(), 6); |
| final NetworkStats.Entry entry = new NetworkStats.Entry(); |
| |
| final HashSet<String> knownIfaces = Sets.newHashSet(); |
| final HashSet<String> activeIfaces = Sets.newHashSet(); |
| |
| // collect any historical stats and active state |
| for (String iface : fileListWithoutNull(mStatsXtIface)) { |
| final File ifacePath = new File(mStatsXtIface, iface); |
| |
| final long active = readSingleLongFromFile(new File(ifacePath, "active")); |
| if (active == 1) { |
| knownIfaces.add(iface); |
| activeIfaces.add(iface); |
| } else if (active == 0) { |
| knownIfaces.add(iface); |
| } else { |
| continue; |
| } |
| |
| entry.iface = iface; |
| entry.uid = UID_ALL; |
| entry.set = SET_DEFAULT; |
| entry.tag = TAG_NONE; |
| entry.rxBytes = readSingleLongFromFile(new File(ifacePath, "rx_bytes")); |
| entry.rxPackets = readSingleLongFromFile(new File(ifacePath, "rx_packets")); |
| entry.txBytes = readSingleLongFromFile(new File(ifacePath, "tx_bytes")); |
| entry.txPackets = readSingleLongFromFile(new File(ifacePath, "tx_packets")); |
| |
| stats.addValues(entry); |
| } |
| |
| final ArrayList<String> values = Lists.newArrayList(); |
| |
| BufferedReader reader = null; |
| try { |
| reader = new BufferedReader(new FileReader(mStatsIface)); |
| |
| // skip first two header lines |
| reader.readLine(); |
| reader.readLine(); |
| |
| // parse remaining lines |
| String line; |
| while ((line = reader.readLine()) != null) { |
| splitLine(line, values); |
| |
| try { |
| entry.iface = values.get(0); |
| entry.uid = UID_ALL; |
| entry.set = SET_DEFAULT; |
| entry.tag = TAG_NONE; |
| entry.rxBytes = Long.parseLong(values.get(1)); |
| entry.rxPackets = Long.parseLong(values.get(2)); |
| entry.txBytes = Long.parseLong(values.get(9)); |
| entry.txPackets = Long.parseLong(values.get(10)); |
| |
| if (activeIfaces.contains(entry.iface)) { |
| // combine stats when iface is active |
| stats.combineValues(entry); |
| } else if (!knownIfaces.contains(entry.iface)) { |
| // add stats when iface is unknown |
| stats.addValues(entry); |
| } |
| } catch (NumberFormatException e) { |
| Slog.w(TAG, "problem parsing stats row '" + line + "': " + e); |
| } |
| } |
| } catch (NullPointerException e) { |
| throw new IllegalStateException("problem parsing stats: " + e); |
| } catch (NumberFormatException e) { |
| throw new IllegalStateException("problem parsing stats: " + e); |
| } catch (IOException e) { |
| throw new IllegalStateException("problem parsing stats: " + e); |
| } finally { |
| IoUtils.closeQuietly(reader); |
| } |
| |
| return stats; |
| } |
| |
| public NetworkStats readNetworkStatsDetail() { |
| return readNetworkStatsDetail(UID_ALL); |
| } |
| |
| /** |
| * Parse and return {@link NetworkStats} with UID-level details. Values |
| * monotonically increase since device boot. |
| * |
| * @throws IllegalStateException when problem parsing stats. |
| */ |
| public NetworkStats readNetworkStatsDetail(int limitUid) throws IllegalStateException { |
| final NetworkStats stats = new NetworkStats(SystemClock.elapsedRealtime(), 24); |
| final NetworkStats.Entry entry = new NetworkStats.Entry(); |
| |
| // TODO: remove knownLines check once 5087722 verified |
| final HashSet<String> knownLines = Sets.newHashSet(); |
| // TODO: remove lastIdx check once 5270106 verified |
| int lastIdx; |
| |
| final ArrayList<String> keys = Lists.newArrayList(); |
| final ArrayList<String> values = Lists.newArrayList(); |
| final HashMap<String, String> parsed = Maps.newHashMap(); |
| |
| BufferedReader reader = null; |
| String line = null; |
| try { |
| reader = new BufferedReader(new FileReader(mStatsXtUid)); |
| |
| // parse first line as header |
| line = reader.readLine(); |
| splitLine(line, keys); |
| lastIdx = 1; |
| |
| // parse remaining lines |
| while ((line = reader.readLine()) != null) { |
| splitLine(line, values); |
| parseLine(keys, values, parsed); |
| |
| if (!knownLines.add(line)) { |
| throw new IllegalStateException("duplicate proc entry: " + line); |
| } |
| |
| final int idx = getParsedInt(parsed, KEY_IDX); |
| if (idx != lastIdx + 1) { |
| throw new IllegalStateException( |
| "inconsistent idx=" + idx + " after lastIdx=" + lastIdx); |
| } |
| lastIdx = idx; |
| |
| entry.iface = parsed.get(KEY_IFACE); |
| entry.uid = getParsedInt(parsed, KEY_UID); |
| entry.set = getParsedInt(parsed, KEY_COUNTER_SET); |
| entry.tag = kernelToTag(parsed.get(KEY_TAG_HEX)); |
| entry.rxBytes = getParsedLong(parsed, KEY_RX_BYTES); |
| entry.rxPackets = getParsedLong(parsed, KEY_RX_PACKETS); |
| entry.txBytes = getParsedLong(parsed, KEY_TX_BYTES); |
| entry.txPackets = getParsedLong(parsed, KEY_TX_PACKETS); |
| |
| if (limitUid == UID_ALL || limitUid == entry.uid) { |
| stats.addValues(entry); |
| } |
| } |
| } catch (NullPointerException e) { |
| throw new IllegalStateException("problem parsing line: " + line, e); |
| } catch (NumberFormatException e) { |
| throw new IllegalStateException("problem parsing line: " + line, e); |
| } catch (IOException e) { |
| throw new IllegalStateException("problem parsing line: " + line, e); |
| } finally { |
| IoUtils.closeQuietly(reader); |
| } |
| return stats; |
| } |
| |
| private static int getParsedInt(HashMap<String, String> parsed, String key) { |
| final String value = parsed.get(key); |
| return value != null ? Integer.parseInt(value) : 0; |
| } |
| |
| private static long getParsedLong(HashMap<String, String> parsed, String key) { |
| final String value = parsed.get(key); |
| return value != null ? Long.parseLong(value) : 0; |
| } |
| |
| /** |
| * Split given line into {@link ArrayList}. |
| */ |
| private static void splitLine(String line, ArrayList<String> outSplit) { |
| outSplit.clear(); |
| |
| final StringTokenizer t = new StringTokenizer(line, " \t\n\r\f:"); |
| while (t.hasMoreTokens()) { |
| outSplit.add(t.nextToken()); |
| } |
| } |
| |
| /** |
| * Zip the two given {@link ArrayList} as key and value pairs into |
| * {@link HashMap}. |
| */ |
| private static void parseLine( |
| ArrayList<String> keys, ArrayList<String> values, HashMap<String, String> outParsed) { |
| outParsed.clear(); |
| |
| final int size = Math.min(keys.size(), values.size()); |
| for (int i = 0; i < size; i++) { |
| outParsed.put(keys.get(i), values.get(i)); |
| } |
| } |
| |
| /** |
| * Utility method to read a single plain-text {@link Long} from the given |
| * {@link File}, usually from a {@code /proc/} filesystem. |
| */ |
| private static long readSingleLongFromFile(File file) { |
| try { |
| final byte[] buffer = IoUtils.readFileAsByteArray(file.toString()); |
| return Long.parseLong(new String(buffer).trim()); |
| } catch (NumberFormatException e) { |
| return -1; |
| } catch (IOException e) { |
| return -1; |
| } |
| } |
| |
| /** |
| * Wrapper for {@link File#list()} that returns empty array instead of |
| * {@code null}. |
| */ |
| private static String[] fileListWithoutNull(File file) { |
| final String[] list = file.list(); |
| return list != null ? list : new String[0]; |
| } |
| } |
