[mdns] stop MdnsAnnouncer when the registration has a conflict
This CL also adds a test case that the hostname is renamed due to a conflict
after probing succeeded.
Bug: 322282952
Change-Id: Iee49e13804630d4cb270a83e9acd6b3e180cf03c
diff --git a/service-t/src/com/android/server/connectivity/mdns/MdnsInterfaceAdvertiser.java b/service-t/src/com/android/server/connectivity/mdns/MdnsInterfaceAdvertiser.java
index f1deab0..aa51c41 100644
--- a/service-t/src/com/android/server/connectivity/mdns/MdnsInterfaceAdvertiser.java
+++ b/service-t/src/com/android/server/connectivity/mdns/MdnsInterfaceAdvertiser.java
@@ -347,6 +347,7 @@
final MdnsProber.ProbingInfo probingInfo = mRecordRepository.setServiceProbing(serviceId);
if (probingInfo == null) return false;
+ mAnnouncer.stop(serviceId);
mProber.restartForConflict(probingInfo);
return true;
}
diff --git a/tests/cts/net/src/android/net/cts/NsdManagerTest.kt b/tests/cts/net/src/android/net/cts/NsdManagerTest.kt
index c368d5b..88bc46b 100644
--- a/tests/cts/net/src/android/net/cts/NsdManagerTest.kt
+++ b/tests/cts/net/src/android/net/cts/NsdManagerTest.kt
@@ -1346,8 +1346,77 @@
}
}
- // TODO: b/322282952 - Add the test case that the hostname is renamed due to a conflict after
- // probing succeeded.
+ @Test
+ fun testRegisterServiceWithCustomHostAndAddresses_conflictAfterProbing_hostRenamed() {
+ val si = makeTestServiceInfo(testNetwork1.network).apply {
+ hostname = customHostname
+ hostAddresses = listOf(
+ parseNumericAddress("192.0.2.24"),
+ parseNumericAddress("2001:db8::3"))
+ }
+
+ // Register service on testNetwork1
+ val registrationRecord = NsdRegistrationRecord()
+ val discoveryRecord = NsdDiscoveryRecord()
+ val registeredService = registerService(registrationRecord, si)
+ val packetReader = TapPacketReader(
+ Handler(handlerThread.looper),
+ testNetwork1.iface.fileDescriptor.fileDescriptor, 1500 /* maxPacketSize */)
+ packetReader.startAsyncForTest()
+ handlerThread.waitForIdle(TIMEOUT_MS)
+
+ tryTest {
+ repeat(3) {
+ assertNotNull(packetReader.pollForAdvertisement(serviceName, serviceType),
+ "Expect 3 announcements sent after initial probing")
+ }
+
+ assertEquals(si.serviceName, registeredService.serviceName)
+ assertEquals(si.hostname, registeredService.hostname)
+
+ nsdManager.discoverServices(serviceType, NsdManager.PROTOCOL_DNS_SD,
+ testNetwork1.network, { it.run() }, discoveryRecord)
+ val discoveredInfo = discoveryRecord.waitForServiceDiscovered(
+ si.serviceName, serviceType)
+
+ // Send a conflicting announcement
+ val conflictingAnnouncement = buildConflictingAnnouncementForCustomHost()
+ packetReader.sendResponse(conflictingAnnouncement)
+
+ // Expect to see probes (RFC6762 9., service is reset to probing state)
+ assertNotNull(packetReader.pollForProbe(serviceName, serviceType),
+ "Probe not received within timeout after conflict")
+
+ // Send the conflicting packet again to reply to the probe
+ packetReader.sendResponse(conflictingAnnouncement)
+
+ val newRegistration =
+ registrationRecord
+ .expectCallbackEventually<ServiceRegistered>(REGISTRATION_TIMEOUT_MS) {
+ it.serviceInfo.serviceName == serviceName
+ && it.serviceInfo.hostname.let { hostname ->
+ hostname != null
+ && hostname.startsWith(customHostname)
+ && hostname != customHostname
+ }
+ }
+
+ val resolvedInfo = resolveService(discoveredInfo)
+ assertEquals(newRegistration.serviceInfo.serviceName, resolvedInfo.serviceName)
+ assertEquals(newRegistration.serviceInfo.hostname, resolvedInfo.hostname)
+
+ discoveryRecord.assertNoCallback()
+ } cleanupStep {
+ nsdManager.stopServiceDiscovery(discoveryRecord)
+ discoveryRecord.expectCallback<DiscoveryStopped>()
+ } cleanupStep {
+ nsdManager.unregisterService(registrationRecord)
+ registrationRecord.expectCallback<ServiceUnregistered>()
+ } cleanup {
+ packetReader.handler.post { packetReader.stop() }
+ handlerThread.waitForIdle(TIMEOUT_MS)
+ }
+ }
@Test
fun testRegisterServiceWithCustomHostNoAddresses_noConflictAfterProbing_notRenamed() {