Connectivity metrics: collect NFLOG wakeup events
This patch stores NFLOG packet wakeup events sent by Netd to the system
server into a ring buffer inside NetdEventListenerService. The content
of this buffer is accessible by $ dumpsys connmetrics or $ dumpsys
connmetrics list, and is added to bug reports.
The wakeup event buffer stores currently uid and timestamps.
Bug: 34901696
Bug: 62179647
Test: runtest frameworks-net, new unit tests
Change-Id: Ie8db6f8572b1a929a20398d8dc03e189bc488382
diff --git a/tests/net/java/com/android/server/connectivity/NetdEventListenerServiceTest.java b/tests/net/java/com/android/server/connectivity/NetdEventListenerServiceTest.java
index 46f395e..3a93b94 100644
--- a/tests/net/java/com/android/server/connectivity/NetdEventListenerServiceTest.java
+++ b/tests/net/java/com/android/server/connectivity/NetdEventListenerServiceTest.java
@@ -19,6 +19,7 @@
import static android.net.metrics.INetdEventListener.EVENT_GETADDRINFO;
import static android.net.metrics.INetdEventListener.EVENT_GETHOSTBYNAME;
import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import static org.mockito.Mockito.any;
import static org.mockito.Mockito.mock;
@@ -75,6 +76,52 @@
}
@Test
+ public void testWakeupEventLogging() throws Exception {
+ final int BUFFER_LENGTH = NetdEventListenerService.WAKEUP_EVENT_BUFFER_LENGTH;
+
+ // Assert no events
+ String[] events1 = listNetdEvent();
+ assertEquals(new String[]{""}, events1);
+
+ long now = System.currentTimeMillis();
+ String prefix = "iface:wlan0";
+ int[] uids = { 10001, 10002, 10004, 1000, 10052, 10023, 10002, 10123, 10004 };
+ for (int uid : uids) {
+ mNetdEventListenerService.onWakeupEvent(prefix, uid, uid, now);
+ }
+
+ String[] events2 = listNetdEvent();
+ assertEquals(uids.length, events2.length);
+ for (int i = 0; i < uids.length; i++) {
+ String got = events2[i];
+ assertContains(got, "wlan0");
+ assertContains(got, "uid: " + uids[i]);
+ }
+
+ int uid = 20000;
+ for (int i = 0; i < BUFFER_LENGTH * 2; i++) {
+ long ts = now + 10;
+ mNetdEventListenerService.onWakeupEvent(prefix, uid, uid, ts);
+ }
+
+ // Assert there are BUFFER_LENGTH events all with uid 20000
+ String[] events3 = listNetdEvent();
+ assertEquals(BUFFER_LENGTH, events3.length);
+ for (String got : events3) {
+ assertContains(got, "wlan0");
+ assertContains(got, "uid: " + uid);
+ }
+
+ uid = 45678;
+ mNetdEventListenerService.onWakeupEvent(prefix, uid, uid, now);
+
+ String[] events4 = listNetdEvent();
+ String lastEvent = events4[events4.length - 1];
+ assertContains(lastEvent, "wlan0");
+ assertContains(lastEvent, "uid: " + uid);
+ }
+
+ @Test
public void testDnsLogging() throws Exception {
asyncDump(100);
@@ -329,4 +376,15 @@
}
return log.toString();
}
+
+ String[] listNetdEvent() throws Exception {
+ StringWriter buffer = new StringWriter();
+ PrintWriter writer = new PrintWriter(buffer);
+ mNetdEventListenerService.list(writer);
+ return buffer.toString().split("\\n");
+ }
+
+ static void assertContains(String got, String want) {
+ assertTrue(got + " did not contain \"" + want + "\"", got.contains(want));
+ }
}