diff --git a/service-t/src/com/android/server/NsdService.java b/service-t/src/com/android/server/NsdService.java
index 9c01ddaf192556cc03f4f7ece76a46ea683e3757..2ac2b18378bdd58b529e42e94cc630b3592f7e17 100644
--- a/service-t/src/com/android/server/NsdService.java
+++ b/service-t/src/com/android/server/NsdService.java
@@ -1702,6 +1702,8 @@ public class NsdService extends INsdManager.Stub {
mContext, MdnsFeatureFlags.NSD_EXPIRED_SERVICES_REMOVAL))
.setIsLabelCountLimitEnabled(mDeps.isTetheringFeatureNotChickenedOut(
mContext, MdnsFeatureFlags.NSD_LIMIT_LABEL_COUNT))
+ .setIsKnownAnswerSuppressionEnabled(mDeps.isFeatureEnabled(
+ mContext, MdnsFeatureFlags.NSD_KNOWN_ANSWER_SUPPRESSION))
.build();
mMdnsSocketClient =
new MdnsMultinetworkSocketClient(handler.getLooper(), mMdnsSocketProvider,
diff --git a/service-t/src/com/android/server/connectivity/mdns/MdnsFeatureFlags.java b/service-t/src/com/android/server/connectivity/mdns/MdnsFeatureFlags.java
index 0a6d8c130be5ad1d62b23031c0dbef00e068ba68..1ad47a30b7862e9a1d85ccd81c280e02e259f796 100644
--- a/service-t/src/com/android/server/connectivity/mdns/MdnsFeatureFlags.java
+++ b/service-t/src/com/android/server/connectivity/mdns/MdnsFeatureFlags.java
@@ -41,6 +41,11 @@ public class MdnsFeatureFlags {
*/
public static final String NSD_LIMIT_LABEL_COUNT = "nsd_limit_label_count";
+ /**
+ * A feature flag to control whether the known-answer suppression should be enabled.
+ */
+ public static final String NSD_KNOWN_ANSWER_SUPPRESSION = "nsd_known_answer_suppression";
+
// Flag for offload feature
public final boolean mIsMdnsOffloadFeatureEnabled;
@@ -53,17 +58,22 @@ public class MdnsFeatureFlags {
// Flag for label count limit
public final boolean mIsLabelCountLimitEnabled;
+ // Flag for known-answer suppression
+ public final boolean mIsKnownAnswerSuppressionEnabled;
+
/**
* The constructor for {@link MdnsFeatureFlags}.
*/
public MdnsFeatureFlags(boolean isOffloadFeatureEnabled,
boolean includeInetAddressRecordsInProbing,
boolean isExpiredServicesRemovalEnabled,
- boolean isLabelCountLimitEnabled) {
+ boolean isLabelCountLimitEnabled,
+ boolean isKnownAnswerSuppressionEnabled) {
mIsMdnsOffloadFeatureEnabled = isOffloadFeatureEnabled;
mIncludeInetAddressRecordsInProbing = includeInetAddressRecordsInProbing;
mIsExpiredServicesRemovalEnabled = isExpiredServicesRemovalEnabled;
mIsLabelCountLimitEnabled = isLabelCountLimitEnabled;
+ mIsKnownAnswerSuppressionEnabled = isKnownAnswerSuppressionEnabled;
}
@@ -79,6 +89,7 @@ public class MdnsFeatureFlags {
private boolean mIncludeInetAddressRecordsInProbing;
private boolean mIsExpiredServicesRemovalEnabled;
private boolean mIsLabelCountLimitEnabled;
+ private boolean mIsKnownAnswerSuppressionEnabled;
/**
* The constructor for {@link Builder}.
@@ -88,6 +99,7 @@ public class MdnsFeatureFlags {
mIncludeInetAddressRecordsInProbing = false;
mIsExpiredServicesRemovalEnabled = false;
mIsLabelCountLimitEnabled = true; // Default enabled.
+ mIsKnownAnswerSuppressionEnabled = false;
}
/**
@@ -131,6 +143,16 @@ public class MdnsFeatureFlags {
return this;
}
+ /**
+ * Set whether the known-answer suppression is enabled.
+ *
+ * @see #NSD_KNOWN_ANSWER_SUPPRESSION
+ */
+ public Builder setIsKnownAnswerSuppressionEnabled(boolean isKnownAnswerSuppressionEnabled) {
+ mIsKnownAnswerSuppressionEnabled = isKnownAnswerSuppressionEnabled;
+ return this;
+ }
+
/**
* Builds a {@link MdnsFeatureFlags} with the arguments supplied to this builder.
*/
@@ -138,7 +160,8 @@ public class MdnsFeatureFlags {
return new MdnsFeatureFlags(mIsMdnsOffloadFeatureEnabled,
mIncludeInetAddressRecordsInProbing,
mIsExpiredServicesRemovalEnabled,
- mIsLabelCountLimitEnabled);
+ mIsLabelCountLimitEnabled,
+ mIsKnownAnswerSuppressionEnabled);
}
}
}
diff --git a/service-t/src/com/android/server/connectivity/mdns/MdnsRecordRepository.java b/service-t/src/com/android/server/connectivity/mdns/MdnsRecordRepository.java
index 1909208700c080f772d83ce49756822b91e2cd3d..d46a7b547437e7f00c3c0dd12d081b808cf1a47b 100644
--- a/service-t/src/com/android/server/connectivity/mdns/MdnsRecordRepository.java
+++ b/service-t/src/com/android/server/connectivity/mdns/MdnsRecordRepository.java
@@ -90,6 +90,7 @@ public class MdnsRecordRepository {
private final Looper mLooper;
@NonNull
private final String[] mDeviceHostname;
+ @NonNull
private final MdnsFeatureFlags mMdnsFeatureFlags;
public MdnsRecordRepository(@NonNull Looper looper, @NonNull String[] deviceHostname,
@@ -502,7 +503,7 @@ public class MdnsRecordRepository {
// Add answers from general records
addReplyFromService(question, mGeneralRecords, null /* servicePtrRecord */,
null /* serviceSrvRecord */, null /* serviceTxtRecord */, replyUnicast, now,
- answerInfo, additionalAnswerRecords);
+ answerInfo, additionalAnswerRecords, Collections.emptyList());
// Add answers from each service
for (int i = 0; i < mServices.size(); i++) {
@@ -510,7 +511,7 @@ public class MdnsRecordRepository {
if (registration.exiting || registration.isProbing) continue;
if (addReplyFromService(question, registration.allRecords, registration.ptrRecords,
registration.srvRecord, registration.txtRecord, replyUnicast, now,
- answerInfo, additionalAnswerRecords)) {
+ answerInfo, additionalAnswerRecords, packet.answers)) {
registration.repliedServiceCount++;
registration.sentPacketCount++;
}
@@ -563,6 +564,15 @@ public class MdnsRecordRepository {
return new MdnsReplyInfo(answerRecords, additionalAnswerRecords, delayMs, dest);
}
+ private boolean isKnownAnswer(MdnsRecord answer, @NonNull List<MdnsRecord> knownAnswerRecords) {
+ for (MdnsRecord knownAnswer : knownAnswerRecords) {
+ if (answer.equals(knownAnswer) && knownAnswer.getTtl() > (answer.getTtl() / 2)) {
+ return true;
+ }
+ }
+ return false;
+ }
+
/**
* Add answers and additional answers for a question, from a ServiceRegistration.
*/
@@ -572,7 +582,8 @@ public class MdnsRecordRepository {
@Nullable RecordInfo<MdnsServiceRecord> serviceSrvRecord,
@Nullable RecordInfo<MdnsTextRecord> serviceTxtRecord,
boolean replyUnicast, long now, @NonNull List<RecordInfo<?>> answerInfo,
- @NonNull List<MdnsRecord> additionalAnswerRecords) {
+ @NonNull List<MdnsRecord> additionalAnswerRecords,
+ @NonNull List<MdnsRecord> knownAnswerRecords) {
boolean hasDnsSdPtrRecordAnswer = false;
boolean hasDnsSdSrvRecordAnswer = false;
boolean hasFullyOwnedNameMatch = false;
@@ -601,6 +612,20 @@ public class MdnsRecordRepository {
}
hasKnownAnswer = true;
+
+ // RFC6762 7.1. Known-Answer Suppression:
+ // A Multicast DNS responder MUST NOT answer a Multicast DNS query if
+ // the answer it would give is already included in the Answer Section
+ // with an RR TTL at least half the correct value. If the RR TTL of the
+ // answer as given in the Answer Section is less than half of the true
+ // RR TTL as known by the Multicast DNS responder, the responder MUST
+ // send an answer so as to update the querier's cache before the record
+ // becomes in danger of expiration.
+ if (mMdnsFeatureFlags.mIsKnownAnswerSuppressionEnabled
+ && isKnownAnswer(info.record, knownAnswerRecords)) {
+ continue;
+ }
+
hasDnsSdPtrRecordAnswer |= (servicePtrRecords != null
&& CollectionUtils.any(servicePtrRecords, r -> info == r));
hasDnsSdSrvRecordAnswer |= (info == serviceSrvRecord);
@@ -612,8 +637,6 @@ public class MdnsRecordRepository {
continue;
}
- // TODO: Don't reply if in known answers of the querier (7.1) if TTL is > half
-
answerInfo.add(info);
}
diff --git a/tests/unit/java/com/android/server/connectivity/mdns/MdnsRecordRepositoryTest.kt b/tests/unit/java/com/android/server/connectivity/mdns/MdnsRecordRepositoryTest.kt
index 85e361d04e637c534d47b267f0e5f63c5ce20d76..196f73ff22e088505d932f85e58ff8d08a349f75 100644
--- a/tests/unit/java/com/android/server/connectivity/mdns/MdnsRecordRepositoryTest.kt
+++ b/tests/unit/java/com/android/server/connectivity/mdns/MdnsRecordRepositoryTest.kt
@@ -36,6 +36,7 @@ import kotlin.test.assertEquals
import kotlin.test.assertFailsWith
import kotlin.test.assertFalse
import kotlin.test.assertNotNull
+import kotlin.test.assertNull
import kotlin.test.assertTrue
import org.junit.After
import org.junit.Before
@@ -48,6 +49,13 @@ private const val TEST_SERVICE_ID_3 = 44
private const val TEST_PORT = 12345
private const val TEST_SUBTYPE = "_subtype"
private const val TEST_SUBTYPE2 = "_subtype2"
+// RFC6762 10. Resource Record TTL Values and Cache Coherency
+// The recommended TTL value for Multicast DNS resource records with a host name as the resource
+// record's name (e.g., A, AAAA, HINFO) or a host name contained within the resource record's rdata
+// (e.g., SRV, reverse mapping PTR record) SHOULD be 120 seconds. The recommended TTL value for
+// other Multicast DNS resource records is 75 minutes.
+private const val LONG_TTL = 4_500_000L
+private const val SHORT_TTL = 120_000L
private val TEST_HOSTNAME = arrayOf("Android_000102030405060708090A0B0C0D0E0F", "local")
private val TEST_ADDRESSES = listOf(
LinkAddress(parseNumericAddress("192.0.2.111"), 24),
@@ -120,7 +128,7 @@ class MdnsRecordRepositoryTest {
assertEquals(MdnsServiceRecord(expectedName,
0L /* receiptTimeMillis */,
false /* cacheFlush */,
- 120_000L /* ttlMillis */,
+ SHORT_TTL /* ttlMillis */,
0 /* servicePriority */, 0 /* serviceWeight */,
TEST_PORT, TEST_HOSTNAME), packet.authorityRecords[0])
@@ -524,9 +532,6 @@ class MdnsRecordRepositoryTest {
assertEquals(MdnsConstants.getMdnsIPv4Address(), reply.destination.address)
assertEquals(MdnsConstants.MDNS_PORT, reply.destination.port)
- // TTLs as per RFC6762 10.
- val longTtl = 4_500_000L
- val shortTtl = 120_000L
val serviceName = arrayOf("MyTestService", "_testservice", "_tcp", "local")
assertEquals(listOf(
@@ -534,7 +539,7 @@ class MdnsRecordRepositoryTest {
queriedName,
0L /* receiptTimeMillis */,
false /* cacheFlush */,
- longTtl,
+ LONG_TTL,
serviceName),
), reply.answers)
@@ -543,13 +548,13 @@ class MdnsRecordRepositoryTest {
serviceName,
0L /* receiptTimeMillis */,
true /* cacheFlush */,
- longTtl,
+ LONG_TTL,
listOf() /* entries */),
MdnsServiceRecord(
serviceName,
0L /* receiptTimeMillis */,
true /* cacheFlush */,
- shortTtl,
+ SHORT_TTL,
0 /* servicePriority */,
0 /* serviceWeight */,
TEST_PORT,
@@ -558,32 +563,32 @@ class MdnsRecordRepositoryTest {
TEST_HOSTNAME,
0L /* receiptTimeMillis */,
true /* cacheFlush */,
- shortTtl,
+ SHORT_TTL,
TEST_ADDRESSES[0].address),
MdnsInetAddressRecord(
TEST_HOSTNAME,
0L /* receiptTimeMillis */,
true /* cacheFlush */,
- shortTtl,
+ SHORT_TTL,
TEST_ADDRESSES[1].address),
MdnsInetAddressRecord(
TEST_HOSTNAME,
0L /* receiptTimeMillis */,
true /* cacheFlush */,
- shortTtl,
+ SHORT_TTL,
TEST_ADDRESSES[2].address),
MdnsNsecRecord(
serviceName,
0L /* receiptTimeMillis */,
true /* cacheFlush */,
- longTtl,
+ LONG_TTL,
serviceName /* nextDomain */,
intArrayOf(MdnsRecord.TYPE_TXT, MdnsRecord.TYPE_SRV)),
MdnsNsecRecord(
TEST_HOSTNAME,
0L /* receiptTimeMillis */,
true /* cacheFlush */,
- shortTtl,
+ SHORT_TTL,
TEST_HOSTNAME /* nextDomain */,
intArrayOf(MdnsRecord.TYPE_A, MdnsRecord.TYPE_AAAA)),
), reply.additionalAnswers)
@@ -760,7 +765,7 @@ class MdnsRecordRepositoryTest {
expectedName,
0L /* receiptTimeMillis */,
false /* cacheFlush */,
- 120_000L /* ttlMillis */,
+ SHORT_TTL /* ttlMillis */,
0 /* servicePriority */,
0 /* serviceWeight */,
TEST_PORT,
@@ -769,24 +774,290 @@ class MdnsRecordRepositoryTest {
TEST_HOSTNAME,
0L /* receiptTimeMillis */,
false /* cacheFlush */,
- 120_000L /* ttlMillis */,
+ SHORT_TTL /* ttlMillis */,
TEST_ADDRESSES[0].address),
MdnsInetAddressRecord(
TEST_HOSTNAME,
0L /* receiptTimeMillis */,
false /* cacheFlush */,
- 120_000L /* ttlMillis */,
+ SHORT_TTL /* ttlMillis */,
TEST_ADDRESSES[1].address),
MdnsInetAddressRecord(
TEST_HOSTNAME,
0L /* receiptTimeMillis */,
false /* cacheFlush */,
- 120_000L /* ttlMillis */,
+ SHORT_TTL /* ttlMillis */,
TEST_ADDRESSES[2].address)
), packet.authorityRecords)
assertContentEquals(intArrayOf(TEST_SERVICE_ID_1), repository.clearServices())
}
+
+ private fun doGetReplyWithAnswersTest(
+ questions: List<MdnsRecord>,
+ knownAnswers: List<MdnsRecord>,
+ replyAnswers: List<MdnsRecord>,
+ additionalAnswers: List<MdnsRecord>,
+ expectReply: Boolean
+ ) {
+ val repository = MdnsRecordRepository(thread.looper, deps, TEST_HOSTNAME,
+ MdnsFeatureFlags.newBuilder().setIsKnownAnswerSuppressionEnabled(true).build())
+ repository.initWithService(TEST_SERVICE_ID_1, TEST_SERVICE_1)
+ val query = MdnsPacket(0 /* flags */, questions, knownAnswers,
+ listOf() /* authorityRecords */, listOf() /* additionalRecords */)
+ val src = InetSocketAddress(parseNumericAddress("192.0.2.123"), 5353)
+ val reply = repository.getReply(query, src)
+
+ if (!expectReply) {
+ assertNull(reply)
+ return
+ }
+
+ assertNotNull(reply)
+ // Source address is IPv4
+ assertEquals(MdnsConstants.getMdnsIPv4Address(), reply.destination.address)
+ assertEquals(MdnsConstants.MDNS_PORT, reply.destination.port)
+ assertEquals(replyAnswers, reply.answers)
+ assertEquals(additionalAnswers, reply.additionalAnswers)
+ }
+
+ @Test
+ fun testGetReply_HasAnswers() {
+ val queriedName = arrayOf("_testservice", "_tcp", "local")
+ val questions = listOf(MdnsPointerRecord(queriedName, false /* isUnicast */))
+ val knownAnswers = listOf(MdnsPointerRecord(
+ arrayOf("_testservice", "_tcp", "local"),
+ 0L /* receiptTimeMillis */,
+ false /* cacheFlush */,
+ LONG_TTL,
+ arrayOf("MyTestService", "_testservice", "_tcp", "local")))
+ doGetReplyWithAnswersTest(questions, knownAnswers, listOf() /* replyAnswers */,
+ listOf() /* additionalAnswers */, false /* expectReply */)
+ }
+
+ @Test
+ fun testGetReply_HasAnswers_TtlLessThanHalf() {
+ val queriedName = arrayOf("_testservice", "_tcp", "local")
+ val serviceName = arrayOf("MyTestService", "_testservice", "_tcp", "local")
+ val questions = listOf(MdnsPointerRecord(queriedName, false /* isUnicast */))
+ val knownAnswers = listOf(MdnsPointerRecord(
+ arrayOf("_testservice", "_tcp", "local"),
+ 0L /* receiptTimeMillis */,
+ false /* cacheFlush */,
+ (LONG_TTL / 2 - 1000L),
+ arrayOf("MyTestService", "_testservice", "_tcp", "local")))
+ val replyAnswers = listOf(MdnsPointerRecord(
+ queriedName,
+ 0L /* receiptTimeMillis */,
+ false /* cacheFlush */,
+ LONG_TTL,
+ serviceName))
+ val additionalAnswers = listOf(
+ MdnsTextRecord(
+ serviceName,
+ 0L /* receiptTimeMillis */,
+ true /* cacheFlush */,
+ LONG_TTL,
+ listOf() /* entries */),
+ MdnsServiceRecord(
+ serviceName,
+ 0L /* receiptTimeMillis */,
+ true /* cacheFlush */,
+ SHORT_TTL,
+ 0 /* servicePriority */,
+ 0 /* serviceWeight */,
+ TEST_PORT,
+ TEST_HOSTNAME),
+ MdnsInetAddressRecord(
+ TEST_HOSTNAME,
+ 0L /* receiptTimeMillis */,
+ true /* cacheFlush */,
+ SHORT_TTL,
+ TEST_ADDRESSES[0].address),
+ MdnsInetAddressRecord(
+ TEST_HOSTNAME,
+ 0L /* receiptTimeMillis */,
+ true /* cacheFlush */,
+ SHORT_TTL,
+ TEST_ADDRESSES[1].address),
+ MdnsInetAddressRecord(
+ TEST_HOSTNAME,
+ 0L /* receiptTimeMillis */,
+ true /* cacheFlush */,
+ SHORT_TTL,
+ TEST_ADDRESSES[2].address),
+ MdnsNsecRecord(
+ serviceName,
+ 0L /* receiptTimeMillis */,
+ true /* cacheFlush */,
+ LONG_TTL,
+ serviceName /* nextDomain */,
+ intArrayOf(MdnsRecord.TYPE_TXT, MdnsRecord.TYPE_SRV)),
+ MdnsNsecRecord(
+ TEST_HOSTNAME,
+ 0L /* receiptTimeMillis */,
+ true /* cacheFlush */,
+ SHORT_TTL,
+ TEST_HOSTNAME /* nextDomain */,
+ intArrayOf(MdnsRecord.TYPE_A, MdnsRecord.TYPE_AAAA)))
+ doGetReplyWithAnswersTest(questions, knownAnswers, replyAnswers, additionalAnswers,
+ true /* expectReply */)
+ }
+
+ @Test
+ fun testGetReply_HasAnotherAnswer() {
+ val queriedName = arrayOf("_testservice", "_tcp", "local")
+ val serviceName = arrayOf("MyTestService", "_testservice", "_tcp", "local")
+ val questions = listOf(MdnsPointerRecord(queriedName, false /* isUnicast */))
+ val knownAnswers = listOf(MdnsPointerRecord(
+ queriedName,
+ 0L /* receiptTimeMillis */,
+ false /* cacheFlush */,
+ LONG_TTL,
+ arrayOf("MyOtherTestService", "_testservice", "_tcp", "local")))
+ val replyAnswers = listOf(MdnsPointerRecord(
+ queriedName,
+ 0L /* receiptTimeMillis */,
+ false /* cacheFlush */,
+ LONG_TTL,
+ serviceName))
+ val additionalAnswers = listOf(
+ MdnsTextRecord(
+ serviceName,
+ 0L /* receiptTimeMillis */,
+ true /* cacheFlush */,
+ LONG_TTL,
+ listOf() /* entries */),
+ MdnsServiceRecord(
+ serviceName,
+ 0L /* receiptTimeMillis */,
+ true /* cacheFlush */,
+ SHORT_TTL,
+ 0 /* servicePriority */,
+ 0 /* serviceWeight */,
+ TEST_PORT,
+ TEST_HOSTNAME),
+ MdnsInetAddressRecord(
+ TEST_HOSTNAME,
+ 0L /* receiptTimeMillis */,
+ true /* cacheFlush */,
+ SHORT_TTL,
+ TEST_ADDRESSES[0].address),
+ MdnsInetAddressRecord(
+ TEST_HOSTNAME,
+ 0L /* receiptTimeMillis */,
+ true /* cacheFlush */,
+ SHORT_TTL,
+ TEST_ADDRESSES[1].address),
+ MdnsInetAddressRecord(
+ TEST_HOSTNAME,
+ 0L /* receiptTimeMillis */,
+ true /* cacheFlush */,
+ SHORT_TTL,
+ TEST_ADDRESSES[2].address),
+ MdnsNsecRecord(
+ serviceName,
+ 0L /* receiptTimeMillis */,
+ true /* cacheFlush */,
+ LONG_TTL,
+ serviceName /* nextDomain */,
+ intArrayOf(MdnsRecord.TYPE_TXT, MdnsRecord.TYPE_SRV)),
+ MdnsNsecRecord(
+ TEST_HOSTNAME,
+ 0L /* receiptTimeMillis */,
+ true /* cacheFlush */,
+ SHORT_TTL,
+ TEST_HOSTNAME /* nextDomain */,
+ intArrayOf(MdnsRecord.TYPE_A, MdnsRecord.TYPE_AAAA)))
+ doGetReplyWithAnswersTest(questions, knownAnswers, replyAnswers, additionalAnswers,
+ true /* expectReply */)
+ }
+
+ @Test
+ fun testGetReply_HasAnswers_MultiQuestions() {
+ val queriedName = arrayOf("_testservice", "_tcp", "local")
+ val serviceName = arrayOf("MyTestService", "_testservice", "_tcp", "local")
+ val questions = listOf(
+ MdnsPointerRecord(queriedName, false /* isUnicast */),
+ MdnsServiceRecord(serviceName, false /* isUnicast */))
+ val knownAnswers = listOf(MdnsPointerRecord(
+ queriedName,
+ 0L /* receiptTimeMillis */,
+ false /* cacheFlush */,
+ LONG_TTL - 1000L,
+ serviceName))
+ val replyAnswers = listOf(MdnsServiceRecord(
+ serviceName,
+ 0L /* receiptTimeMillis */,
+ false /* cacheFlush */,
+ SHORT_TTL /* ttlMillis */,
+ 0 /* servicePriority */,
+ 0 /* serviceWeight */,
+ TEST_PORT,
+ TEST_HOSTNAME))
+ val additionalAnswers = listOf(
+ MdnsInetAddressRecord(
+ TEST_HOSTNAME,
+ 0L /* receiptTimeMillis */,
+ true /* cacheFlush */,
+ SHORT_TTL,
+ TEST_ADDRESSES[0].address),
+ MdnsInetAddressRecord(
+ TEST_HOSTNAME,
+ 0L /* receiptTimeMillis */,
+ true /* cacheFlush */,
+ SHORT_TTL,
+ TEST_ADDRESSES[1].address),
+ MdnsInetAddressRecord(
+ TEST_HOSTNAME,
+ 0L /* receiptTimeMillis */,
+ true /* cacheFlush */,
+ SHORT_TTL,
+ TEST_ADDRESSES[2].address),
+ MdnsNsecRecord(
+ serviceName,
+ 0L /* receiptTimeMillis */,
+ true /* cacheFlush */,
+ LONG_TTL,
+ serviceName /* nextDomain */,
+ intArrayOf(MdnsRecord.TYPE_SRV)),
+ MdnsNsecRecord(
+ TEST_HOSTNAME,
+ 0L /* receiptTimeMillis */,
+ true /* cacheFlush */,
+ SHORT_TTL,
+ TEST_HOSTNAME /* nextDomain */,
+ intArrayOf(MdnsRecord.TYPE_A, MdnsRecord.TYPE_AAAA)))
+ doGetReplyWithAnswersTest(questions, knownAnswers, replyAnswers, additionalAnswers,
+ true /* expectReply */)
+ }
+
+ @Test
+ fun testGetReply_HasAnswers_MultiQuestions_NoReply() {
+ val queriedName = arrayOf("_testservice", "_tcp", "local")
+ val serviceName = arrayOf("MyTestService", "_testservice", "_tcp", "local")
+ val questions = listOf(
+ MdnsPointerRecord(queriedName, false /* isUnicast */),
+ MdnsServiceRecord(serviceName, false /* isUnicast */))
+ val knownAnswers = listOf(
+ MdnsPointerRecord(
+ queriedName,
+ 0L /* receiptTimeMillis */,
+ false /* cacheFlush */,
+ LONG_TTL - 1000L,
+ serviceName),
+ MdnsServiceRecord(
+ serviceName,
+ 0L /* receiptTimeMillis */,
+ false /* cacheFlush */,
+ SHORT_TTL - 15_000L,
+ 0 /* servicePriority */,
+ 0 /* serviceWeight */,
+ TEST_PORT,
+ TEST_HOSTNAME))
+ doGetReplyWithAnswersTest(questions, knownAnswers, listOf() /* replyAnswers */,
+ listOf() /* additionalAnswers */, false /* expectReply */)
+ }
}
private fun MdnsRecordRepository.initWithService(