Test that when a responder only responds with the exact records that
were queried, so only reply for PTR in discovery, only send SRV, TXT,
A, AAAA when asked explicitly, service resolve succeeds.

This ensures that the querier sends followup queries for each record.
See RFC6763 12., especially the last paragraph.

Bug: 267570781
Bug: 267371243
Test: atest NsdManagerTest
Change-Id: Ia392e80c1e27b479c6177d19f6b4be6032dcb1cd

The mDNS library need to be backported to some internal library which
support minSdk 21. Therefore, updated the build rules to add the linter
check.

Bug: 296175311
Test: TH
Change-Id: Iae0bffa315dc6de2339a05f595b13480fa7385ae

Add end-to-end testing for testing NsdManager advertising and
discovering works fine with downstream tethering interfaces.

Bug: 281639507
Test: atest NsdManagerTest
Change-Id: I5a66423f216cfe0c82db5128502c885980ab264b

The test flake is likely caused by a carrier configuration
update. After the update is complete, the shell permission is
dropped, which causes the test network setup to fail due to a
lack of permission. The test network setup should also be
protected by a synchronized lock to avoid permission lost.

Bug: 296980394
Test: atest android.net.cts.ConnectivityDiagnosticsManagerTest \
      --iteration 50
Change-Id: I3c7a0a92cddeb7c0f41a11b929f72714f8b22c05

The isLegacy field of Nsd metrics should indicate whether the
data was collected from the old backend or not. However, it is
currently only dependent on the ENABLE_PLATFORM_MDNS_BACKEND
compat change value, which is incorrect. This is because the
NsdService always uses the new backend since Android U,
regardless of the compat change value. Therefore, the isLegacy
data should be obtained from each transaction.

Bug: 287546772
Bug: 299880473
Test: atest FrameworksNetTestCases NsdManagerTest
Change-Id: I156abd656b90578d710696a69ccf7dfca97a2c9c

As connectivity pre-check was added to CtsNativeNetDnsTestCases
recently, this CL is needed as well.

Bug: 298886804
Test: TreeHugger
Change-Id: I3c26920e8609256470cd2b8c37fc1f33f56c39fd

Test: ConnectivitySampleMetricsTest
Change-Id: I0afdda023208c3f8620cb5b89add66448af596d7

This sets up what is necessary for an instrumented
ConnectivityService to run. Users of this class are
meant to inherit CSTest.

This is still relatively basic and does not have all the
instrumentation in ConnectivityServiceTest. Developers
looking to extend CSTest may find some instrumentation
missing ; when they add the missing instrumentation,
they should consider whether it should be generic for all
CSTests (and put it in base/), or whether it's local to
their own test suite. This should enable faster testing
as each CSTest children will only need to set up the
instrumentation it actually needs.

This patch also migrates a basic test to have a first user.

Bug: 272685721
Test: ConnectivityServiceTest
      CSBasicMethodsTest
Change-Id: I1c47f616af90629c9cb2a6ae89d992b19863e704

Bug: 297482971
Test: TH
Change-Id: I6f2cdd066d9047b113ff80211cf6d4c6fa605104

Bug: 298729534
Test: atest com.android.cts.net.HostsideConnOnActivityStartTest
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:eaf030ea96f3af817e8b301c8edf48f79d7f229d)
Merged-In: I58a23e927cd14b973048e34566350eeef215f7db
Change-Id: I58a23e927cd14b973048e34566350eeef215f7db

Verify that the extra info for validation logs in the
NetworkInfo is set.

Bug: 297790570
Test: atest FrameworksNetTests
Change-Id: I5b77b3bab30154b7979cda003274cde0d834a5fb

Test: TreeHugger
Bug: 291025434
Bug: 289802481
Bug: 294510745
Change-Id: I3c9646468834305e48c531040640e05f80b1c5e7

This allows using assumptions to skip tests.

Test: atest CtsHostsideNetworkTests
Change-Id: Ic1fc41c1ca0c30b6b7350c413d710d959b9a5013

Test: test-only change
Change-Id: If3702cf9c3a36e3b7cb1853784f1a8ff98d7be07

Report more advertising metrics data below when the service is
unregistered.
- Replied request count (sum across interfaces)
- Sent packet count (including announcements and probes)
- Number of conflicts during probing
- Nubmer of conflicts after probing

Bug: 287546772
Test: atest FrameworksNetTestCases NsdManagerTest
Merged-In: I50c54a35dc523422e3a7302c059bbbc38eac5631
Change-Id: I50c54a35dc523422e3a7302c059bbbc38eac5631

There was no such method in R release, use SdkLevel to check
framework version and use different API accordingly.

Test: TH
Fix: 297768044
Change-Id: I357c0d56646ffd5eb018b6bb4efe47d4c48e71d3

Per RFC6762#10.1, the cache flush bit should be false for
existing announcement. Otherwise, the record will be deleted
immediately when receiving this response.

Bug: 299054783
Test: atest FrameworksNetTestCases NsdManagerTest
Change-Id: I8bf1a5b1914b49720862836abb543b232185f5f5

Add the missing logic to send the rawOffloadPacket to OffloadEngine.

Bug: 297314970
Test: atest CtsNetTestCases FrameworksNetTestCases
Change-Id: I06d7a9bb84df72808eff4f0c9df60f7e60aa2a2c

For an app to register itself as an offloadEngine, it must have either
of the following permissions: NETWORK_STACK,
PERMISSION_MAINLINE_NETWORK_STACK, NETWORK_SETTINGS,
REGISTER_NSD_OFFLOAD_ENGINE.

Bug: 294777050
Test: atest CtsNetTestCases FrameworksNetTests
Change-Id: I19fe9b996a02b1ae23116c02a1b8406d93b3ecf1

This change includes:
1. Mark groupedBy*() deprecated and throw after android U.
2. Modify map() to mapKeysNotNull().
3. rename clearInterfaces to withoutInterfaces and refactoring.
4. Modify tests accordingly.

Test: atest FrameworksNetTests:android.net.connectivity.android.net.NetworkStatsTest
Fix: 296149902
Fix: 296150018
Change-Id: I5d97422ba957a212c0c5fbc1eee3f8b174343348

Closing TCP sockets sends RST packets. If the cellular modem is idle,
sending RST packets will wake the modem up and consume battery.

This CL adds delay_destroy_frozen_sockets_version flag.
When this flag and destroy_frozen_sockets_version is enabled,
ConnectivityService delays closing socket until the cellular modem wakes up.
Pending frozen sockets are closed also when cellular network becomes no
longer the default network.

This CL also adds flag status and pending uids to the dump.

Bug: 284900338
Test: FrameworksNetTests
Change-Id: I2562568390dda36d02f72afb3a96f824788964c0

The Next app is only necessary in development branches and right now the
in-development SDK is V.

Test: TH
Change-Id: I6aa72d70bc124ae7cf40962b172965d1f0fdb437

When the OffloadEngine is registered, it should get notice about all the
currently offloaded service.

Bug: 297314970
Test: atest CtsNetTestCases
Change-Id: I1b977a40476a1f5c30a075b559e72656a42865ae

These flake occasionally because registering a request increases
the current request count synchronously while unregistering
decreases it asynchronously, meaning if the test has time to
call register 100 times before unregister can run it will
wrongfully flake.
This could be addressed in production code but as comments in
the change explain, this isn't worth the complexity. Hence
just have a pinpoint fix in the test. See aosp/2707373 for
what a fix in the production code would look like.

Test: manual
Bug: 289530922
Change-Id: Iad9a725eda91406f820abe4706bca0a4756352a4

Update tests to verify that the underlying network reevaluation
is triggered when VPN validation status switches to unvalidated.

Bug: 296183603
Test: atest FrameworksNetTests
Change-Id: I80934cce6e7f2d56039bdd6ad63c6f7173a597cb

Test: TreeHugger
Bug: 295800201
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: I82771644045e0e37f73725730bd0bd2265ac5b77

There is a race between releaseTetheredInterface() and a new interface
being created. Calling setEthernetEnabled(true) forces the test to wait
on a callback that is generated on the ethernet handler thread (and
therefore guarantees releaseTetheredInterface() has been processed).

Bug: 296012516
Test: atest EthernetManagerTest
Change-Id: I7a1a763ba5c1c50274a112b8c1b8c04f35696f12

This is a no-op refactoring that splits constants and utility
methods into standalone classes which will be shared with
a bpf reader class in subsequent CLs.

NO_IFTTT=No-op refactoring

Test: atest FrameworksNetTests:android.net.connectivity.com.android.server.BpfNetMapsTest
Test: atest ConnectivityCoverageTests:android.net.connectivity.com.android.net.module.util.StructTest

Bug: 297836825
Change-Id: I6d7ea044e43180ae001573009a166be74ebe6a5d

Bug: 289606688
Test: atest FrameworksNetTests
Change-Id: Ib35a63ac5f68599c646afad5cad68c1753fb732f

Followup CL for aosp/2700076

Bug: 296972712
Test: build with aosp/2688146
Change-Id: I617b330c42a99e4c839adac2ea614756b5955ce9

createChangeEvent is not expected to be called from a test, so make it
private. Also delete pollOrThrow as polling inline creates a better log
output.

Test: atest EthernetManagerTest
Change-Id: I2399960fee2c51fdf340186189ae83a20c4ac6f3

Tests that registering a EthernetStateListener functions as expected
after requesting a tethering interface and subsequently removing that
interface.

Test: atest testCallbacks_afterRemovingServerModeInterface
Bug: 290971780
Change-Id: I7b6e1a3b3ac23f4fbdd2d20f63f83d59c4d4999d

Test: N/A
Change-Id: I50101f9e5dc4dede5732a31da4ecd53d027adedc

Test cases are accessing wifi when WiFi feature not enabled.
This change skips the test from executing based on WiFi feature
availabiliy.

Bug: 262228635
Test: Executed all CtsNetTestCases tests on system with and without WiFi
feature

Change-Id: I97872cf7b73eed12dba064697150f09c81f494b6

Report the sent query count when the discovery is stopped.

Bug: 287546772
Test: atest FrameworksNetTestCases NsdManagerTest
Change-Id: I47b91c0c530eee2f00920ee5ea99e8d7b6e2e9ee

Bug: 287546772
Test: atest FrameworksNetTestCases
Change-Id: I630c0e4921f7acf42bf29812d9790ee5a894d60b

The platform doesn't allow overwriting compat flags that have target SDK
lower than the platform SDK in release build. Ignoring the test cases
that need compat flag overwrite up to S_V2 makes the MTS pass on S
device.

Bug: 296248982
Test: TH
Change-Id: Iab102725004c39b4dc3c0200c9bc673dd6be1302

Report the nsd metrics event of resolution stop.

Bug: 287546772
Test: atest FrameworksNetTestCases
Change-Id: I2e6de22c946d58a3410f16b2f2689fd3ffc635a4

Those tests are no longer flaky after fix being merged, so add
them back to presubmit.

Fix: 293239828
Test: atest CtsNetTestCases:android.net.cts.Ikev2VpnTest \
      --rerun-until-failure 100
Change-Id: I3e5b0f8053404b8840e8ce67ea82344ab53ce421

The created handler thread will stay there for a while until
all the tests are finished. This is considered as a leakage
which will take the resource from the devices. In low end
devices, this may possibly impact the performance. The created
threads should be closed explicitly.

Test: atest FrameworksNetTests
Change-Id: Id5faceec341578f1c9757194c91a433fbb3f657f