The names of the individual modules do not quite follow the pattern
that java_sdk_library uses so this temporarily sets the following:
    naming_scheme: "frameworks-modules"

That causes java_sdk_library to use a naming scheme that matches the
one used by the individual modules of this. It will be cleaned up
later.

Part of the purpose of the java_sdk_library is to hide the
implementation code and force users of the library to depend on stubs
for a well defined API. Ideally, it would allow access to the
implementation in those cases where it is safe, e.g. from within the
same APEX, or from tests for the implementation. Unfortunately, due to
limitations in the build it does not yet have enough information to
make that decision correctly which means that any code that needs to
compile against the implementation is broken which would prevent us
from converting the module to java_sdk_library.

However, the only way to provide the additional information to allow
the implementation to be correctly exposed is to convert the modules
to java_sdk_library; a cycle.

In order to break that cycle the java_sdk_library creates a special
<module>.impl target which is used directly by tests and any other code
that needs it. Once all the modules have been converted to a
java_sdk_library then we can resolve the limitations in the build and
remove the direct references to <module>.impl.

Test: m Tethering InProcessTethering checkapi
Bug: 155164730
Merged-In: If5c115f482751f9f4b5f047e9e401a18e36799ef
Change-Id: Id1c2e848430c49a2da7402244814cd084f5da77c

Bug: 156866746
Test: atest TetheringTests, TetheringCoverageTests
Merged-In: I7c539f1f4a447b5913164b222601c6113c6fe645
Change-Id: I7c539f1f4a447b5913164b222601c6113c6fe645

If upstream is cellular, set the TTL in Router Advertisements to
"network-set TTL - 1" for carrier requirement. For other non-cellular
upstream, set TTL as "network-set TTL + 1" to preventing arbitrary
distinction between tethered and untethered traffic.

Bug: 154776299
Test: atest TetheringTests

Merged-In: I7f2696a642f96c6aafb5613b980bf5bcdd08bbda
Change-Id: I7f2696a642f96c6aafb5613b980bf5bcdd08bbda

Bug: 154869719
Test: atest TetheringTests
Original-Change: https://android-review.googlesource.com/1288503

Fix TetheringServiceTest test WRITE_SETTINGS permission failure

AdoptShellPermissionIdentity can not pass permission check by
Settings#checkAndNoteWriteSettingsOperation. It would compare the caller
uid and its package name. See error below:
1. java.lang.SecurityException:
Specified package com.android.shell under uid 10239 but it is really 2000
2. java.lang.SecurityException:
uid 10245 does not have android.permission.UPDATE_APP_OPS_STATS.

Override the method and test if caller hold WRITE_SETTINGS directly.

Bug: 154869719
Test: TetheringTests, TetheringCoverageTests, NetworkStackNextTests,
NetworkStackCoverageTests
Original-Change: https://android-review.googlesource.com/1313806

Change-Id: I7beea3f011d930e433443ed62d772a3f8cce5d78
Merged-In: I7beea3f011d930e433443ed62d772a3f8cce5d78

Add the specific implementation of onNewPrefixRequest callback
on IpServer side, also refactor some common code.

Bug: 130741856
Test: atest TetheringTests
Merged-In: If2871bf899cb5890bbfee18063a194c92b6f474e
Change-Id: If2871bf899cb5890bbfee18063a194c92b6f474e

Bug: 156557122
Test: atest TetheringTests

Merged-In: Id9c0397306f3872fc23520d1354f338035a96dc9
Change-Id: Id9c0397306f3872fc23520d1354f338035a96dc9

1. Move isTetheringSupport logic from TetheringService to Tethering.
2. Small readability improvement in TetheringTest. Also change
config_tether_upstream_automatic from false to true in TetheringTest.
So TetheringTests would default run automatic select upstream flow
instead of selecting by legacy perferred network type list.

Bug: 153609486
Test: atest TetheringTest
Change-Id: I5a82a6347f62d3a7031db5c56e8e0c8530dafd8f
Merged-In: I5a82a6347f62d3a7031db5c56e8e0c8530dafd8f

Merge the otherwise unused tethering-aidl-interfaces into
framework-tethering.

This is in preparation for converting to use java_sdk_library.

Bug: 155164730
Test: m droid
Merged-In: I4583539d11ba69320aa5a0dfcfee072c81affac2
Change-Id: I4583539d11ba69320aa5a0dfcfee072c81affac2
(cherry picked from commit 267dd95c3e93f75c42c3f4e5cf576829b528f6c2)

- Correct description and spelling in the code and xml files.
- Add a TODO for refactoring the IpServer constructor.
- Refine the if-statement for starting IP neighbor monitor.

Bug: 149997301
Test: atest IpServerTest
Original-Change: https://android-review.googlesource.com/1309273
Merged-In: If9c8bc6f785fa80575db56de4e223292e9807ace
Change-Id: If9c8bc6f785fa80575db56de4e223292e9807ace

Bug: 145490751
Test: atest TetheringTests

Merged-In: Ia402a6caaa0dfaa05d25a02101c515bbd884d33f
Change-Id: Ia402a6caaa0dfaa05d25a02101c515bbd884d33f

The tether bpf offload can be enabled by resource config and
device config. The device config has higher priority and it
could override this config which is set by resource config.

Bug: 149997301
Test: -build, flash, boot
      -atest TetheringConfigurationTest
Original-Change: https://android-review.googlesource.com/1276007

Use device option to control BPF offload features

If BPF offload device config is not enabled:
- Does not add/remove offload forwarding rules through disabling IP
  neighbor monitor.
- Does not apply the RA MTU reduction.

Bug: 149997301
Test: atest IpServerTest
Original-Change: https://android-review.googlesource.com/1284578
Merged-In: I2d6f80f0229f580c4b16243a064e889a6c37f77a
Change-Id: I2d6f80f0229f580c4b16243a064e889a6c37f77a

Modules contributing mainline modules (APK/APEX) should set
min_sdk_version as well as apex_available.

InProcessTethering is a part of com.android.tethering.inprocess,
therefore min_sdk_version is set.

Exempt-From-Owner-Approval: CP from AOSP

Bug: 145796956
Bug: 150999716
Test: m
Merged-In: I655211e0b9aa4bd7cb3718b6f567f0aa1a0176a5
Change-Id: I655211e0b9aa4bd7cb3718b6f567f0aa1a0176a5
(cherry picked from commit ace605ef568fecfe148d2785f4681c9c858487aa)

Modules contributing mainline modules (APK/APEX) should set
min_sdk_version as well as apex_available.

For now setting min_sdk_version doesn't change build outputs.
But build-time checks will be added soon.

Bug: 145796956
Bug: 150999716
Test: m
Merged-In: Ifaecb49a47a1f43edea3ea06e1cf704a177d1044
Change-Id: Ifaecb49a47a1f43edea3ea06e1cf704a177d1044
(cherry picked from commit 33aa294e96f13906f596e427b96652fe80cf199b)

To exempt from entitlement check, caller need to hold TETHER_PRIVILEGED
permission.

Bug: 141256482
Test: atest TetheringTests

Change-Id: I2eb37f5e92f5f5150a7fb7c25b945e28704d27a0
Merged-In: I2eb37f5e92f5f5150a7fb7c25b945e28704d27a0

Bug: 141256482
Test: atest TetheringTests
Merged-In: I0cf337625cee31a47879c59e9b18657ea7624eb4
Change-Id: I0cf337625cee31a47879c59e9b18657ea7624eb4

1. Change ArraySet usage to BitSet
2. Change mCellularUpstreamPermitted to mLastCellularUpstreamPermitted.

Before this change:
a member variable(mCellularUpstreamPermitted) is
used to check whether cellular upstream is permitted, the code must
ensure to update this variable once entitlement result is changed or the
entitlement check is triggered but does not have a result yet.

In this change:
Instead of storing the information about whether cellular is permitted in
a member variable. The information is recalculated every time when user
call isCellularUpstreamPermitted(). Now isCellularUpstreamPermitted() is
always be used to check whether cellular upstream is permitted no matter
inside or outside EntitlementManager.
This make the code be easier to maintain that we do not need to care
when mCellularUpstreamPermitted need to be updated because the
information would be recalculated every time. And the recalculation is
lock free because this is only used inside tethering while running in
the same thread.

Bug: 141256482
Test: atest TetheringTests

Merged-In: Ic83f42ff4eec38adf039d55d80fcb9b0f16373cc
Change-Id: Ic83f42ff4eec38adf039d55d80fcb9b0f16373cc

Test: m nothing
Bug: 133526962
Original-Change: https://android-review.googlesource.com/1301313
Merged-In: I507f40866d04db5ed3361831e01eaa4dfaf20bed
Change-Id: I507f40866d04db5ed3361831e01eaa4dfaf20bed

Bug: 145490751
Test: atest TetheringTests
Merged-In: I01fc6969041711f7a15880144ee5eac591086ecd
Change-Id: I01fc6969041711f7a15880144ee5eac591086ecd

Bug: 155604224
Test: build
Change-Id: I4147173b5f3668491ff9cb7f1f86715b036d6d4b

This adds checking of module api compatibility to the individual module
api rules. Until now, this checking has been done via the monolithic
metalava runs which we are aiming to get rid of.

Now is a good time to do this because we can compare them to the just
finalized version 30 API, which we have no diffs with. Baseline the
existing wifi failures that metalava fails to find in the previous API.

Bug: 144149403
Test: m checkapi
Change-Id: Id222895daa3a769c265965b052a17d5a1ca18462

Test: atest TetheringTests
Bug: 149467454

Change-Id: I0b07a0b520dedb479bf863fbfe898ae85b84b0f3
Merged-In: I0b07a0b520dedb479bf863fbfe898ae85b84b0f3
(cherry picked from commit 8371fa281839d5b1a1027936f2f83e59bf5301a3)

Test: atest TetheringConfigurationTest
Bug: 149467454
Change-Id: I8b4ad920a4945504914d3741a9fba5c096fbf452
Merged-In: I8b4ad920a4945504914d3741a9fba5c096fbf452
(cherry-picked from aosp/1299413)

Test: atest OffloadControllerTest
Bug: 149467454
Change-Id: I9b9c9c096a2366aaf383d5c2d567db6682f02dad
Merged-In: I9b9c9c096a2366aaf383d5c2d567db6682f02dad
(cherry-picked from aosp/1295347)

This is a no-op refactoring to adapt new test provider callback.
Also this patch adapts TestLooper to allow better control on
delay messages that will be verified in subsequent tests.

Test: atest OffloadControllerTest
Bug: 149467454
Change-Id: Icfd6ff289d6689ae2d5753d3fe472516c808dc7a
Merged-In: Icfd6ff289d6689ae2d5753d3fe472516c808dc7a
(cherry-picked from aosp/1295346)

Auto-generated-cl: translation import
Change-Id: Ib973f0e381ec0c90f5983a266341444cf919bbea

This makes the filenames of the disted artifacts (api txts and stubs)
match the module name of the modules they're from. This matches the
naming scheme used by java_sdk_library, which should make the future
transition to this build rule easier.

Bug: 149293194
Test: lunch sdk_phone_armv7 && m sdk dist && find out/dist/apistubs
Change-Id: I076f30931bf2524d57703873cd7de25b3f23b457

It was using the systemapi stub defaults, but should be using the
module_lib default.

Bug: 144149403
Test: m
Change-Id: Iaab154d9d71900284d92d518a086fc1227c00d5c

* changes:
  [SP18.1] add dependency object to OffloadController
  [SP18] Poll network stats in OffloadController to support data warning

In order to mock constant in unit test, a dependency object is
introduced with minimum code change to achieve this.

Test: atest TetheringTests
Bug: 149467454
Change-Id: I38628daddcb7be7c74846e78d36dc88f065b97d9
Merged-In: I38628daddcb7be7c74846e78d36dc88f065b97d9
(cherry picked from commit 29aee20b)

The OEM implemented tether offload does not support
data warning since the HAL only tells the hardware about data limit
but not warning. However, to add such interface in HAL needs OEM to
comply and implement in hardware.

Thus, as a short-term solution, polls network statistics from HAL
and notify upper layer when it reaches the alert quota set by
NetworkStatsService.

Note that when CPU is sleeping, the data warning of tethering offload
will not work since the polling is also suspended.

Test: manual
Test: atest OffloadControllerTest
Bug: 149467454
Change-Id: I2467b64779b74cd5fec73b42fb303584f52cb1cb
Merged-In: I2467b64779b74cd5fec73b42fb303584f52cb1cb
(cherry picked from commit 93660e38)

Address issues found during AIDL review:
 - Rename clientAddr to singleClientAddr
 - Do not use a ParcelableBundle for notifyNetworkTested or
   notifyDataStallSuspected; instead use AIDL parcelables for stronger
   backwards compatibility guarantees.

Test: atest NetworkMonitorTest ConnectivityServiceTest
      ConnectivityServiceIntegrationTest, manual
Bug: 153500847
Merged-In: Id9b71784e5f6294d203230e57737979e063ff0f8
Change-Id: Id9b71784e5f6294d203230e57737979e063ff0f8