Make DNS cache lifecycle management explicit
1. ConnectivityService calls netd binder to create/destroy network directly.
2. Call dnsresolver binder to create/destroy cache after create/destroy network.
3. Remove unused network create/destroy methods in NetworkManagementService.
Bug: 129453995
Test: atest FrameworksNetTests
Merged-In: I388e208143c38b89bcbb0589de393250024d59aa
(cherry picked from commit 204ca13e63f063f044ac4ad3b96f08b473fe59df)
Change-Id: I4d3dfd9305b60a724aa2dc38448948d8e710c932
diff --git a/core/java/android/os/INetworkManagementService.aidl b/core/java/android/os/INetworkManagementService.aidl
index db23cfa..7f60b9c 100644
--- a/core/java/android/os/INetworkManagementService.aidl
+++ b/core/java/android/os/INetworkManagementService.aidl
@@ -363,18 +363,6 @@
boolean isNetworkActive();
/**
- * Setup a new physical network.
- * @param permission PERMISSION_NONE if no permissions required to access this network.
- * PERMISSION_NETWORK or PERMISSION_SYSTEM to set respective permission.
- */
- void createPhysicalNetwork(int netId, int permission);
-
- /**
- * Setup a new VPN.
- */
- void createVirtualNetwork(int netId, boolean secure);
-
- /**
* Add an interface to a network.
*/
void addInterfaceToNetwork(String iface, int netId);
diff --git a/services/core/java/com/android/server/ConnectivityService.java b/services/core/java/com/android/server/ConnectivityService.java
index f5710e3..55f9826 100644
--- a/services/core/java/com/android/server/ConnectivityService.java
+++ b/services/core/java/com/android/server/ConnectivityService.java
@@ -3071,11 +3071,7 @@
// fallback network the default or requested a new network from the
// NetworkFactories, so network traffic isn't interrupted for an unnecessarily
// long time.
- try {
- mNetd.networkDestroy(nai.network.netId);
- } catch (RemoteException | ServiceSpecificException e) {
- loge("Exception destroying network: " + e);
- }
+ destroyNativeNetwork(nai);
mDnsManager.removeNetwork(nai.network);
}
synchronized (mNetworkForNetId) {
@@ -3083,6 +3079,35 @@
}
}
+ private boolean createNativeNetwork(@NonNull NetworkAgentInfo networkAgent) {
+ try {
+ // This should never fail. Specifying an already in use NetID will cause failure.
+ if (networkAgent.isVPN()) {
+ mNetd.networkCreateVpn(networkAgent.network.netId,
+ (networkAgent.networkMisc == null
+ || !networkAgent.networkMisc.allowBypass));
+ } else {
+ mNetd.networkCreatePhysical(networkAgent.network.netId,
+ getNetworkPermission(networkAgent.networkCapabilities));
+ }
+ mDnsResolver.createNetworkCache(networkAgent.network.netId);
+ return true;
+ } catch (RemoteException | ServiceSpecificException e) {
+ loge("Error creating network " + networkAgent.network.netId + ": "
+ + e.getMessage());
+ return false;
+ }
+ }
+
+ private void destroyNativeNetwork(@NonNull NetworkAgentInfo networkAgent) {
+ try {
+ mNetd.networkDestroy(networkAgent.network.netId);
+ mDnsResolver.destroyNetworkCache(networkAgent.network.netId);
+ } catch (RemoteException | ServiceSpecificException e) {
+ loge("Exception destroying network: " + e);
+ }
+ }
+
// If this method proves to be too slow then we can maintain a separate
// pendingIntent => NetworkRequestInfo map.
// This method assumes that every non-null PendingIntent maps to exactly 1 NetworkRequestInfo.
@@ -6476,21 +6501,7 @@
// A network that has just connected has zero requests and is thus a foreground network.
networkAgent.networkCapabilities.addCapability(NET_CAPABILITY_FOREGROUND);
- try {
- // This should never fail. Specifying an already in use NetID will cause failure.
- if (networkAgent.isVPN()) {
- mNMS.createVirtualNetwork(networkAgent.network.netId,
- (networkAgent.networkMisc == null ||
- !networkAgent.networkMisc.allowBypass));
- } else {
- mNMS.createPhysicalNetwork(networkAgent.network.netId,
- getNetworkPermission(networkAgent.networkCapabilities));
- }
- } catch (Exception e) {
- loge("Error creating network " + networkAgent.network.netId + ": "
- + e.getMessage());
- return;
- }
+ if (!createNativeNetwork(networkAgent)) return;
networkAgent.created = true;
}
diff --git a/services/core/java/com/android/server/NetworkManagementService.java b/services/core/java/com/android/server/NetworkManagementService.java
index b1aaa82..8d76634 100644
--- a/services/core/java/com/android/server/NetworkManagementService.java
+++ b/services/core/java/com/android/server/NetworkManagementService.java
@@ -2051,28 +2051,6 @@
}
@Override
- public void createPhysicalNetwork(int netId, int permission) {
- mContext.enforceCallingOrSelfPermission(CONNECTIVITY_INTERNAL, TAG);
-
- try {
- mNetdService.networkCreatePhysical(netId, permission);
- } catch (RemoteException | ServiceSpecificException e) {
- throw new IllegalStateException(e);
- }
- }
-
- @Override
- public void createVirtualNetwork(int netId, boolean secure) {
- mContext.enforceCallingOrSelfPermission(CONNECTIVITY_INTERNAL, TAG);
-
- try {
- mNetdService.networkCreateVpn(netId, secure);
- } catch (RemoteException | ServiceSpecificException e) {
- throw new IllegalStateException(e);
- }
- }
-
- @Override
public void addInterfaceToNetwork(String iface, int netId) {
modifyInterfaceInNetwork(MODIFY_OPERATION_ADD, netId, iface);
}
diff --git a/services/core/java/com/android/server/connectivity/DnsManager.java b/services/core/java/com/android/server/connectivity/DnsManager.java
index e33392d..2321afb 100644
--- a/services/core/java/com/android/server/connectivity/DnsManager.java
+++ b/services/core/java/com/android/server/connectivity/DnsManager.java
@@ -263,12 +263,6 @@
}
public void removeNetwork(Network network) {
- try {
- mDnsResolver.clearResolverConfiguration(network.netId);
- } catch (RemoteException | ServiceSpecificException e) {
- Slog.e(TAG, "Error clearing DNS configuration: " + e);
- return;
- }
mPrivateDnsMap.remove(network.netId);
mPrivateDnsValidationMap.remove(network.netId);
}
diff --git a/tests/net/java/com/android/server/ConnectivityServiceTest.java b/tests/net/java/com/android/server/ConnectivityServiceTest.java
index 16ec134..c15775f 100644
--- a/tests/net/java/com/android/server/ConnectivityServiceTest.java
+++ b/tests/net/java/com/android/server/ConnectivityServiceTest.java
@@ -4894,7 +4894,10 @@
mCellNetworkAgent.sendLinkProperties(cellLp);
mCellNetworkAgent.connect(false);
waitForIdle();
- // CS tells netd about the empty DNS config for this network.
+
+ verify(mMockDnsResolver, times(1)).createNetworkCache(
+ eq(mCellNetworkAgent.getNetwork().netId));
+ // CS tells dnsresolver about the empty DNS config for this network.
verify(mMockDnsResolver, atLeastOnce()).setResolverConfiguration(any());
reset(mMockDnsResolver);
@@ -4978,6 +4981,8 @@
mCellNetworkAgent.sendLinkProperties(cellLp);
mCellNetworkAgent.connect(false);
waitForIdle();
+ verify(mMockDnsResolver, times(1)).createNetworkCache(
+ eq(mCellNetworkAgent.getNetwork().netId));
verify(mMockDnsResolver, atLeastOnce()).setResolverConfiguration(
mResolverParamsParcelCaptor.capture());
ResolverParamsParcel resolvrParams = mResolverParamsParcelCaptor.getValue();
@@ -5851,12 +5856,17 @@
cellLp.addRoute(new RouteInfo(myIpv6, null, MOBILE_IFNAME));
reset(mNetworkManagementService);
reset(mMockDnsResolver);
+ reset(mMockNetd);
when(mNetworkManagementService.getInterfaceConfig(CLAT_PREFIX + MOBILE_IFNAME))
.thenReturn(getClatInterfaceConfig(myIpv4));
// Connect with ipv6 link properties. Expect prefix discovery to be started.
mCellNetworkAgent.sendLinkProperties(cellLp);
mCellNetworkAgent.connect(true);
+
+ verify(mMockNetd, times(1)).networkCreatePhysical(eq(cellNetId), anyInt());
+ verify(mMockDnsResolver, times(1)).createNetworkCache(eq(cellNetId));
+
networkCallback.expectAvailableThenValidatedCallbacks(mCellNetworkAgent);
verify(mMockDnsResolver, times(1)).startPrefix64Discovery(cellNetId);
@@ -6048,7 +6058,7 @@
verify(mNetworkManagementService, times(0)).removeIdleTimer(eq(MOBILE_IFNAME));
verify(mMockNetd, times(1)).networkDestroy(eq(mCellNetworkAgent.getNetwork().netId));
verify(mMockDnsResolver, times(1))
- .clearResolverConfiguration(eq(mCellNetworkAgent.getNetwork().netId));
+ .destroyNetworkCache(eq(mCellNetworkAgent.getNetwork().netId));
// Disconnect wifi
ConditionVariable cv = waitForConnectivityBroadcasts(1);