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Conditionally accept loss of on-link IPv6 DNS servers

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Permit this if and only if we're not "avoiding bad wifi" in general.

Bug: 31827713
Change-Id: I0874ec2d1d09e913ccdbe9f6e178090400808a04
This commit is contained in:
Erik Kline
2016-10-03 19:53:50 +09:00
committed by Lorenzo Colitti
parent 065ab6ee40
commit 5b437d6ff9
2 changed files with 21 additions and 4 deletions
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3
services/net/java/android/net/ip/IpManager.java
View File

@ -1068,7 +1068,8 @@ public class IpManager extends StateMachine {
public void notifyLost(InetAddress ip, String logMsg) {
mCallback.onReachabilityLost(logMsg);
}
});
},
mAvoidBadWifiTracker);
}
}

20
services/net/java/android/net/ip/IpReachabilityMonitor.java
View File

@ -34,6 +34,7 @@ import android.net.netlink.RtNetlinkNeighborMessage;
import android.net.netlink.StructNdaCacheInfo;
import android.net.netlink.StructNdMsg;
import android.net.netlink.StructNlMsgHdr;
import android.net.util.AvoidBadWifiTracker;
import android.os.PowerManager;
import android.os.SystemClock;
import android.system.ErrnoException;
@ -42,6 +43,7 @@ import android.system.OsConstants;
import android.util.Log;
import java.io.InterruptedIOException;
import java.net.Inet6Address;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.NetworkInterface;
@ -149,6 +151,7 @@ public class IpReachabilityMonitor {
private final String mInterfaceName;
private final int mInterfaceIndex;
private final Callback mCallback;
private final AvoidBadWifiTracker mAvoidBadWifiTracker;
private final NetlinkSocketObserver mNetlinkSocketObserver;
private final Thread mObserverThread;
private final IpConnectivityLog mMetricsLog = new IpConnectivityLog();
@ -219,8 +222,12 @@ public class IpReachabilityMonitor {
return errno;
}
public IpReachabilityMonitor(Context context, String ifName, Callback callback)
throws IllegalArgumentException {
public IpReachabilityMonitor(Context context, String ifName, Callback callback) {
this(context, ifName, callback, null);
}
public IpReachabilityMonitor(Context context, String ifName, Callback callback,
AvoidBadWifiTracker tracker) throws IllegalArgumentException {
mInterfaceName = ifName;
int ifIndex = -1;
try {
@ -232,6 +239,7 @@ public class IpReachabilityMonitor {
mWakeLock = ((PowerManager) context.getSystemService(Context.POWER_SERVICE)).newWakeLock(
PowerManager.PARTIAL_WAKE_LOCK, TAG + "." + mInterfaceName);
mCallback = callback;
mAvoidBadWifiTracker = tracker;
mNetlinkSocketObserver = new NetlinkSocketObserver();
mObserverThread = new Thread(mNetlinkSocketObserver);
mObserverThread.start();
@ -355,8 +363,12 @@ public class IpReachabilityMonitor {
whatIfLp.removeRoute(route);
}
}
if (avoidingBadLinks() || !(ip instanceof Inet6Address)) {
// We should do this unconditionally, but alas we cannot: b/31827713.
whatIfLp.removeDnsServer(ip);
}
}
delta = LinkProperties.compareProvisioning(mLinkProperties, whatIfLp);
}
@ -373,6 +385,10 @@ public class IpReachabilityMonitor {
logNudFailed(delta);
}
private boolean avoidingBadLinks() {
return (mAvoidBadWifiTracker != null) ? mAvoidBadWifiTracker.currentValue() : true;
}
public void probeAll() {
Set<InetAddress> ipProbeList = new HashSet<InetAddress>();
synchronized (mLock) {