Clear DNS cache after every network access.
If the app tries to make a network connection in the
foreground immediately after trying to do the same when
it's network access was blocked, it could receive a
UnknownHostException due to the cached DNS entry.
So, clear the dns cache after every network access for
now until we have a fix on the platform side.
Bug: 237549250
Bug: 238064333
Bug: 237556596
Bug: 238962235
Bug: 238833668
Bug: 239262832
Test: atest ./tests/cts/hostside/src/com/android/cts/net/HostsideRestrictBackgroundNetworkTests.java
Ignore-AOSP-First: Will be cherrypicked to aosp later
Change-Id: Ic603b1bd9da24ee3724054c4a91794ee569e97f6
diff --git a/tests/cts/hostside/app2/Android.bp b/tests/cts/hostside/app2/Android.bp
index edfaf9f..db92f5c 100644
--- a/tests/cts/hostside/app2/Android.bp
+++ b/tests/cts/hostside/app2/Android.bp
@@ -21,7 +21,7 @@
android_test_helper_app {
name: "CtsHostsideNetworkTestsApp2",
defaults: ["cts_support_defaults"],
- sdk_version: "test_current",
+ platform_apis: true,
static_libs: [
"androidx.annotation_annotation",
"CtsHostsideNetworkTestsAidl",
diff --git a/tests/cts/hostside/app2/src/com/android/cts/net/hostside/app2/MyBroadcastReceiver.java b/tests/cts/hostside/app2/src/com/android/cts/net/hostside/app2/MyBroadcastReceiver.java
index 771b404..825f2c9 100644
--- a/tests/cts/hostside/app2/src/com/android/cts/net/hostside/app2/MyBroadcastReceiver.java
+++ b/tests/cts/hostside/app2/src/com/android/cts/net/hostside/app2/MyBroadcastReceiver.java
@@ -48,6 +48,7 @@
import android.widget.Toast;
import java.net.HttpURLConnection;
+import java.net.InetAddress;
import java.net.URL;
/**
@@ -182,6 +183,11 @@
checkStatus = false;
checkDetails = "Exception getting " + address + ": " + e;
}
+ // If the app tries to make a network connection in the foreground immediately after
+ // trying to do the same when it's network access was blocked, it could receive a
+ // UnknownHostException due to the cached DNS entry. So, clear the dns cache after
+ // every network access for now until we have a fix on the platform side.
+ InetAddress.clearDnsCache();
Log.d(TAG, checkDetails);
final String state, detailedState;
if (networkInfo != null) {
