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Allow specifying a network for SNTP time sync

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Permits syncing over a specific network instead of the default for
the process. This was causing an issue with Android Wear devices
paired with iOS where the default network is bluetooth
(see b/32663274).

This CL is in support of ag/3776564

Bug: 32663274

Test: adb shell am instrument -e class android.net.SntpClientTest -w \
com.android.frameworks.coretests/android.support.test.runner.AndroidJUnitRunner

Change-Id: Ic9fc169cf75457810d4992121d85d7642e350b90
This commit is contained in:
Kurt Marcinkiewicz
2018-03-05 14:45:04 -08:00
parent 163a57d71e
commit dfdd82e84f
5 changed files with 58 additions and 21 deletions
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1
config/hiddenapi-vendor-list.txt
View File

@@ -309,7 +309,6 @@ Landroid/net/RouteInfo;->selectBestRoute(Ljava/util/Collection;Ljava/net/InetAdd
Landroid/net/SntpClient;->getNtpTime()J
Landroid/net/SntpClient;->getNtpTimeReference()J
Landroid/net/SntpClient;->getRoundTripTime()J
Landroid/net/SntpClient;->requestTime(Ljava/lang/String;I)Z
Landroid/net/StaticIpConfiguration;->dnsServers:Ljava/util/ArrayList;
Landroid/net/StaticIpConfiguration;->domains:Ljava/lang/String;
Landroid/net/StaticIpConfiguration;->gateway:Ljava/net/InetAddress;

16
core/java/android/net/SntpClient.java
View File

@@ -80,25 +80,27 @@ public class SntpClient {
*
* @param host host name of the server.
* @param timeout network timeout in milliseconds.
* @param network network over which to send the request.
* @return true if the transaction was successful.
*/
public boolean requestTime(String host, int timeout) {
public boolean requestTime(String host, int timeout, Network network) {
InetAddress address = null;
try {
address = InetAddress.getByName(host);
address = network.getByName(host);
} catch (Exception e) {
EventLogTags.writeNtpFailure(host, e.toString());
if (DBG) Log.d(TAG, "request time failed: " + e);
return false;
}
return requestTime(address, NTP_PORT, timeout);
return requestTime(address, NTP_PORT, timeout, network);
}
public boolean requestTime(InetAddress address, int port, int timeout) {
public boolean requestTime(InetAddress address, int port, int timeout, Network network) {
DatagramSocket socket = null;
final int oldTag = TrafficStats.getAndSetThreadStatsTag(TrafficStats.TAG_SYSTEM_NTP);
try {
socket = new DatagramSocket();
network.bindSocket(socket);
socket.setSoTimeout(timeout);
byte[] buffer = new byte[NTP_PACKET_SIZE];
DatagramPacket request = new DatagramPacket(buffer, buffer.length, address, port);
@@ -168,6 +170,12 @@ public class SntpClient {
return true;
}
@Deprecated
public boolean requestTime(String host, int timeout) {
Log.w(TAG, "Shame on you for calling the hidden API requestTime()!");
return false;
}
/**
* Returns the time computed from the NTP transaction.
*

19
core/java/android/util/NtpTrustedTime.java
View File

@@ -20,6 +20,7 @@ import android.content.ContentResolver;
import android.content.Context;
import android.content.res.Resources;
import android.net.ConnectivityManager;
import android.net.Network;
import android.net.NetworkInfo;
import android.net.SntpClient;
import android.os.SystemClock;
@@ -80,6 +81,18 @@ public class NtpTrustedTime implements TrustedTime {
@Override
public boolean forceRefresh() {
// We can't do this at initialization time: ConnectivityService might not be running yet.
synchronized (this) {
if (mCM == null) {
mCM = sContext.getSystemService(ConnectivityManager.class);
}
}
final Network network = mCM == null ? null : mCM.getActiveNetwork();
return forceRefresh(network);
}
public boolean forceRefresh(Network network) {
if (TextUtils.isEmpty(mServer)) {
// missing server, so no trusted time available
return false;
@@ -88,11 +101,11 @@ public class NtpTrustedTime implements TrustedTime {
// We can't do this at initialization time: ConnectivityService might not be running yet.
synchronized (this) {
if (mCM == null) {
mCM = (ConnectivityManager) sContext.getSystemService(Context.CONNECTIVITY_SERVICE);
mCM = sContext.getSystemService(ConnectivityManager.class);
}
}
final NetworkInfo ni = mCM == null ? null : mCM.getActiveNetworkInfo();
final NetworkInfo ni = mCM == null ? null : mCM.getNetworkInfo(network);
if (ni == null || !ni.isConnected()) {
if (LOGD) Log.d(TAG, "forceRefresh: no connectivity");
return false;
@@ -101,7 +114,7 @@ public class NtpTrustedTime implements TrustedTime {
if (LOGD) Log.d(TAG, "forceRefresh() from cache miss");
final SntpClient client = new SntpClient();
if (client.requestTime(mServer, (int) mTimeout)) {
if (client.requestTime(mServer, (int) mTimeout, network)) {
mHasCache = true;
mCachedNtpTime = client.getNtpTime();
mCachedNtpElapsedRealtime = client.getNtpTimeReference();

31
core/tests/coretests/src/android/net/SntpClientTest.java
View File

@@ -16,7 +16,8 @@
package android.net;
import android.net.SntpClient;
import android.content.Context;
import android.test.AndroidTestCase;
import android.util.Log;
import libcore.util.HexEncoding;
@@ -26,10 +27,9 @@ import java.net.DatagramSocket;
import java.net.InetAddress;
import java.net.SocketException;
import java.util.Arrays;
import junit.framework.TestCase;
public class SntpClientTest extends TestCase {
public class SntpClientTest extends AndroidTestCase {
private static final String TAG = "SntpClientTest";
private static final int ORIGINATE_TIME_OFFSET = 24;
@@ -61,20 +61,29 @@ public class SntpClientTest extends TestCase {
private final SntpTestServer mServer = new SntpTestServer();
private final SntpClient mClient = new SntpClient();
private Network mNetwork;
@Override
protected void setUp() throws Exception {
super.setUp();
ConnectivityManager mCM = getContext().getSystemService(ConnectivityManager.class);
mNetwork = mCM.getActiveNetwork();
}
public void testBasicWorkingSntpClientQuery() throws Exception {
mServer.setServerReply(HexEncoding.decode(WORKING_VERSION4.toCharArray(), false));
assertTrue(mClient.requestTime(mServer.getAddress(), mServer.getPort(), 500));
assertTrue(mClient.requestTime(mServer.getAddress(), mServer.getPort(), 500, mNetwork));
assertEquals(1, mServer.numRequestsReceived());
assertEquals(1, mServer.numRepliesSent());
}
public void testDnsResolutionFailure() throws Exception {
assertFalse(mClient.requestTime("ntp.server.doesnotexist.example", 5000));
assertFalse(mClient.requestTime("ntp.server.doesnotexist.example", 5000, mNetwork));
}
public void testTimeoutFailure() throws Exception {
mServer.clearServerReply();
assertFalse(mClient.requestTime(mServer.getAddress(), mServer.getPort(), 500));
assertFalse(mClient.requestTime(mServer.getAddress(), mServer.getPort(), 500, mNetwork));
assertEquals(1, mServer.numRequestsReceived());
assertEquals(0, mServer.numRepliesSent());
}
@@ -83,7 +92,7 @@ public class SntpClientTest extends TestCase {
final byte[] reply = HexEncoding.decode(WORKING_VERSION4.toCharArray(), false);
reply[0] |= (byte) 0xc0;
mServer.setServerReply(reply);
assertFalse(mClient.requestTime(mServer.getAddress(), mServer.getPort(), 500));
assertFalse(mClient.requestTime(mServer.getAddress(), mServer.getPort(), 500, mNetwork));
assertEquals(1, mServer.numRequestsReceived());
assertEquals(1, mServer.numRepliesSent());
}
@@ -95,7 +104,8 @@ public class SntpClientTest extends TestCase {
reply[0] &= (byte) 0xf8;
reply[0] |= (byte) i;
mServer.setServerReply(reply);
final boolean rval = mClient.requestTime(mServer.getAddress(), mServer.getPort(), 500);
final boolean rval = mClient.requestTime(mServer.getAddress(), mServer.getPort(), 500,
mNetwork);
switch (i) {
case NTP_MODE_SERVER:
case NTP_MODE_BROADCAST:
@@ -119,7 +129,8 @@ public class SntpClientTest extends TestCase {
final String logMsg = "stratum: " + i;
reply[1] = (byte) i;
mServer.setServerReply(reply);
final boolean rval = mClient.requestTime(mServer.getAddress(), mServer.getPort(), 500);
final boolean rval = mClient.requestTime(mServer.getAddress(), mServer.getPort(), 500,
mNetwork);
if (STRATUM_MIN <= i && i <= STRATUM_MAX) {
assertTrue(logMsg, rval);
} else {
@@ -134,7 +145,7 @@ public class SntpClientTest extends TestCase {
final byte[] reply = HexEncoding.decode(WORKING_VERSION4.toCharArray(), false);
Arrays.fill(reply, TRANSMIT_TIME_OFFSET, TRANSMIT_TIME_OFFSET + 8, (byte) 0x00);
mServer.setServerReply(reply);
assertFalse(mClient.requestTime(mServer.getAddress(), mServer.getPort(), 500));
assertFalse(mClient.requestTime(mServer.getAddress(), mServer.getPort(), 500, mNetwork));
assertEquals(1, mServer.numRequestsReceived());
assertEquals(1, mServer.numRepliesSent());
}

12
tests/BandwidthTests/src/com/android/tests/bandwidthenforcement/BandwidthEnforcementTestService.java
View File

@@ -16,7 +16,10 @@
package com.android.tests.bandwidthenforcement;
import android.app.IntentService;
import android.content.Context;
import android.content.Intent;
import android.net.ConnectivityManager;
import android.net.Network;
import android.net.SntpClient;
import android.os.Environment;
import android.util.Log;
@@ -55,7 +58,7 @@ public class BandwidthEnforcementTestService extends IntentService {
String outputFile = intent.getStringExtra(OUTPUT_FILE);
dumpResult("testUrlConnection", testUrlConnection(), outputFile);
dumpResult("testUrlConnectionv6", testUrlConnectionv6(), outputFile);
dumpResult("testSntp", testSntp(), outputFile);
dumpResult("testSntp", testSntp(getApplicationContext()), outputFile);
dumpResult("testDns", testDns(), outputFile);
}
@@ -138,9 +141,12 @@ public class BandwidthEnforcementTestService extends IntentService {
* Tests to connect via sntp.
* @return true if it was able to connect, false otherwise.
*/
public static boolean testSntp() {
public static boolean testSntp(Context context) {
final SntpClient client = new SntpClient();
if (client.requestTime("0.pool.ntp.org", 10000)) {
final ConnectivityManager mCM = context.getSystemService(ConnectivityManager.class);
final Network network = mCM.getActiveNetwork();
if (client.requestTime("0.pool.ntp.org", 10000, network)) {
return true;
}
return false;