[NS A33] Unify changing the default network
makeDefault() will be called in rematchAllNetworksAndRequests
in all cases and its first job is to set mDefaultNetwork.
The old code checks if the currently processing request is
the default request and assigns mDefaultNetwork if it is,
doing it earlier than in the new code iff the new default is
not null. However there is no good reason to assign this
member earlier in the non-null case than in the null case,
it's simpler if the same code path is used in both cases.
mDefaultNetwork is also not used between the old place where
it was set and the new place where it is set, so changing
the timing of the assignment has no observable side effects.
Test: ConnectivityServiceTest
Change-Id: Id47c19b73650ba66bff73b07edb8fd95c707e699
diff --git a/services/core/java/com/android/server/ConnectivityService.java b/services/core/java/com/android/server/ConnectivityService.java
index 0e8fb97..326ab2e 100644
--- a/services/core/java/com/android/server/ConnectivityService.java
+++ b/services/core/java/com/android/server/ConnectivityService.java
@@ -172,7 +172,6 @@
import com.android.internal.util.DumpUtils;
import com.android.internal.util.IndentingPrintWriter;
import com.android.internal.util.MessageUtils;
-import com.android.internal.util.ObjectUtils;
import com.android.internal.util.XmlUtils;
import com.android.server.am.BatteryStatsService;
import com.android.server.connectivity.AutodestructReference;
@@ -6367,20 +6366,28 @@
}
}
- private void makeDefault(@NonNull final NetworkAgentInfo newNetwork) {
+ private void makeDefault(@Nullable final NetworkAgentInfo newNetwork) {
if (DBG) log("Switching to new default network: " + newNetwork);
+ mDefaultNetworkNai = newNetwork;
+
try {
- mNMS.setDefaultNetId(newNetwork.network.netId);
+ if (null != newNetwork) {
+ mNMS.setDefaultNetId(newNetwork.network.netId);
+ } else {
+ mNMS.clearDefaultNetId();
+ }
} catch (Exception e) {
loge("Exception setting default network :" + e);
}
- mDefaultNetworkNai = newNetwork;
notifyLockdownVpn(newNetwork);
- handleApplyDefaultProxy(newNetwork.linkProperties.getHttpProxy());
- updateTcpBufferSizes(newNetwork.linkProperties.getTcpBufferSizes());
- mDnsManager.setDefaultDnsSystemProperties(newNetwork.linkProperties.getDnsServers());
+ handleApplyDefaultProxy(null != newNetwork
+ ? newNetwork.linkProperties.getHttpProxy() : null);
+ updateTcpBufferSizes(null != newNetwork
+ ? newNetwork.linkProperties.getTcpBufferSizes() : null);
+ mDnsManager.setDefaultDnsSystemProperties(null != newNetwork
+ ? newNetwork.linkProperties.getDnsServers() : Collections.EMPTY_LIST);
notifyIfacesChangedForNetworkStats();
// Fix up the NetworkCapabilities of any VPNs that don't specify underlying networks.
updateAllVpnsCapabilities();
@@ -6461,10 +6468,11 @@
}
// Will return null if this reassignment does not change the network assigned to
- // the passed request, or if it changes this request to not have a satisfier any more.
- @Nullable private NetworkAgentInfo getNewSatisfier(@NonNull final NetworkRequestInfo nri) {
+ // the passed request.
+ @Nullable
+ private RequestReassignment getReassignment(@NonNull final NetworkRequestInfo nri) {
for (final RequestReassignment event : getRequestReassignments()) {
- if (nri == event.mRequest) return event.mNewNetwork;
+ if (nri == event.mRequest) return event;
}
return null;
}
@@ -6582,7 +6590,6 @@
}
newNetwork.removeRequest(nri.request.requestId);
nri.mSatisfier = null;
- if (isDefaultRequest(nri)) mDefaultNetworkNai = null;
}
// Tell NetworkProviders about the new score, so they can stop
// trying to connect if they know they cannot match it.
@@ -6617,15 +6624,17 @@
}
final NetworkRequestInfo defaultRequestInfo = mNetworkRequests.get(mDefaultRequest);
- final NetworkAgentInfo newDefaultNetwork = ObjectUtils.getOrElse(
- changes.getNewSatisfier(defaultRequestInfo), oldDefaultNetwork);
+ final NetworkReassignment.RequestReassignment reassignment =
+ changes.getReassignment(defaultRequestInfo);
+ final NetworkAgentInfo newDefaultNetwork =
+ null != reassignment ? reassignment.mNewNetwork : oldDefaultNetwork;
if (oldDefaultNetwork != newDefaultNetwork) {
if (oldDefaultNetwork != null) {
mLingerMonitor.noteLingerDefaultNetwork(oldDefaultNetwork, newDefaultNetwork);
}
updateDataActivityTracking(newDefaultNetwork, oldDefaultNetwork);
- // Notify system services that this network is up.
+ // Notify system services of the new default.
makeDefault(newDefaultNetwork);
// Log 0 -> X and Y -> X default network transitions, where X is the new default.
mDeps.getMetricsLogger().defaultNetworkMetrics().logDefaultNetworkEvent(
diff --git a/services/core/java/com/android/server/connectivity/LingerMonitor.java b/services/core/java/com/android/server/connectivity/LingerMonitor.java
index 929dfc4..7071510 100644
--- a/services/core/java/com/android/server/connectivity/LingerMonitor.java
+++ b/services/core/java/com/android/server/connectivity/LingerMonitor.java
@@ -16,6 +16,10 @@
package com.android.server.connectivity;
+import static android.net.ConnectivityManager.NETID_UNSET;
+
+import android.annotation.NonNull;
+import android.annotation.Nullable;
import android.app.PendingIntent;
import android.content.ComponentName;
import android.content.Context;
@@ -27,18 +31,16 @@
import android.text.format.DateUtils;
import android.util.Log;
import android.util.SparseArray;
-import android.util.SparseIntArray;
import android.util.SparseBooleanArray;
-import java.util.Arrays;
-import java.util.HashMap;
+import android.util.SparseIntArray;
import com.android.internal.R;
import com.android.internal.annotations.VisibleForTesting;
import com.android.internal.util.MessageUtils;
-import com.android.server.connectivity.NetworkNotificationManager;
import com.android.server.connectivity.NetworkNotificationManager.NotificationType;
-import static android.net.ConnectivityManager.NETID_UNSET;
+import java.util.Arrays;
+import java.util.HashMap;
/**
* Class that monitors default network linger events and possibly notifies the user of network
@@ -206,8 +208,19 @@
mEverNotified.put(fromNai.network.netId, true);
}
+ /**
+ * Put up or dismiss a notification or toast for of a change in the default network if needed.
+ *
+ * Putting up a notification when switching from no network to some network is not supported
+ * and as such this method can't be called with a null |fromNai|. It can be called with a
+ * null |toNai| if there isn't a default network any more.
+ *
+ * @param fromNai switching from this NAI
+ * @param toNai switching to this NAI
+ */
// The default network changed from fromNai to toNai due to a change in score.
- public void noteLingerDefaultNetwork(NetworkAgentInfo fromNai, NetworkAgentInfo toNai) {
+ public void noteLingerDefaultNetwork(@NonNull final NetworkAgentInfo fromNai,
+ @Nullable final NetworkAgentInfo toNai) {
if (VDBG) {
Log.d(TAG, "noteLingerDefaultNetwork from=" + fromNai.name() +
" everValidated=" + fromNai.everValidated +
@@ -221,6 +234,10 @@
// Internet access).
maybeStopNotifying(fromNai);
+ // If the network was simply lost (either because it disconnected or because it stopped
+ // being the default with no replacement), then don't show a notification.
+ if (null == toNai) return;
+
// If this network never validated, don't notify. Otherwise, we could do things like:
//
// 1. Unvalidated wifi connects.