A similar option already exists in
packages/modules/Connectivity/Cronet/apex/Android.bp. This is in
preparation of adding cronet to framework-tethering. It is possible that
we only end up using one of the variables but better safe than sorry.

This change will be blocked by the blocked automerger into
tm-mainline-prod. If this continues to be a problem, we might have to
play some tricks with automerger.

Test: TH
Change-Id: I40ba22aba041ec12ec2bf2881df14e6c0ee53b44

* changes:
  gn2bp: Use startswith instead of regex
  gn2bp: Remove unused condition for src path filtering
  gn2bp: Use "out" prefix for src path filtering

Test: ./update_results.sh
Change-Id: Ic85de603d6edb3565552731bac60a57961c8aecc

Test: ./update_results.sh
Change-Id: I5731123496490759e5ec3e8f53dd19d8fe6554b4

instead of "out/test".

Test: ./update_results.sh
Change-Id: I28fd863742f2531bb942a15c636ca311ef45c307

It's very basic for now.

Test: run the script
Change-Id: Ie848f8da6936f4300ba5ecdc041523440be25e8a

This is a repeat of:
  https://android-review.git.corp.google.com/c/platform/packages/modules/Connectivity/+/2266447

which was reverted in:
  https://android-review.git.corp.google.com/c/platform/packages/modules/Connectivity/+/2372509



This time with kver >= 4.14 protections of the bpf_skb_adjust_room()
bpf helper which isn't present on 4.9 T devices.

Original change comments:

Tested manually on a flame device connected to an ipv6-only wifi
network (GoogleGuest).

On server:
  nc -4 -l -u -p 443

On client (phone):
  adb shell nc -4 -u my.server 443

On client (phone):
  adb shell tcpdump -l -ee -vv -s 1600 -i v4-wlan0

On client send something to server "Hi."
On server send something to client "Hey!"

You should see normal unfragmented IP packets.

Then on server send something really long (I used 57 copies of the 26 letter English alphabet).  This should be long enough that fragmentation is required.

You should see tcpdump show 2 ipv4 fragments, and netcat
show the packet being delivered correctly.

(and previous versions of the code were buggy and were
resulting in corrupt packets and things not working)

Test: TreeHugger
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: I6758e63d8133215edd26b4cd2d73a5b5f261ffd1

Instant apps cannot create sockets and the CTSTestServer used
in all of cronet cts need to create sockets

Test: m cts && cts-tradefed run cts -m CtsCronetTestCases
Bug: 263472960
Change-Id: I4b929c2c339e23f01351d96930c5185b0b25d964

Respect the upstream interface mtu instead of always setting
mtu 1500.

Using upstream interface mtu is probably not the best solution
for tether offload pmtu but it at least respects the upstream
interface mtu which may be less than 1500.

Test: manual test
1. Connect to carrier Taiwan Star.
2. Enable tethering and check the mtu 1434 in dumpsys.
IPv4 Upstream: proto [inDstMac] iif(iface) src -> nat ->
dst [outDstMac] pmtu age
  udp [02:10:45:32:ef:35] 54(54) 192.168.72.125:39034
  -> 15(rmnet1) 100.83.189.11:39034
  -> 142.251.43.14:443 [00:00:00:00:00:00] 1434 69657ms
IPv4 Downstream: proto [inDstMac] iif(iface) src -> nat
  -> dst [outDstMac] pmtu age
  udp [00:00:00:00:00:00] 15(rmnet1) 142.251.43.14:443
  -> 54(54) 100.83.189.11:39034
  -> 192.168.72.125:39034 [9a:8a:4d:ec:a4:7c] 1434 69633ms

Bug: 262860312
Test: atest BpfCoordinatorTest
Change-Id: Ic6dcb95ed76d5306053e4645b6baebc67ff082cf

Test: cd external/cronet && mm
Change-Id: Idec19f1364c9dca4d278a33eebf500a4db87f389

This reverts commit be9685c3.

Reason for revert:
  fails on 4.9 due to bpf_skb_adjust_room requiring a later kernel,
  will need an alternative approach

Bug: 261818177
Test: TreeHugger
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: I26535a96de80febc2fd54dcb564cde4f9ed7b3c9

will make it easier to extend this for 5.4+ behaviour as well
without having to introduce another is_5_4 boolean

Bug: 263884894
Test: TreeHugger
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: Id4f6512d813dd460cb2b9a7ccb6a5f7b7e937575

easier on bpf verifier with no third case

Bug: 263884894
Test: TreeHugger
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: I5076de6f83ba522ed4783bca0a9d7fca4024986a

* This was failing the pre-submits are cc_objects are compilable modules but they failed to compile due to empty srcs. However, this didn't affect the compilation of Cronet as the empty cc_objects are never in the path of compilation of Cronet because their attributes are propagated up the tree.

Test: m
Change-Id: I7cc87d53d4f460ef4958d5ecfb23ac28662fdbdc

This is a preparation to add new interface index.

Test: atest BpfCoordinatorTest
Change-Id: I758c2e7142099d74099fb8203f41ffec9b1182ee

Currently, mSubscriberIdMatchRule is only used in NetworkTemplate
and it depends on if mMatchSubscriberIds is empty or not. Thus,
remove it since is not really necessary and replace it with
checking matchSubscriberIds if needed.

Bug: 238843364
Test: build, FrameworksNetTests
      CtsNetTestCases
Change-Id: Ic66d2ff2826846778b004bb15a4718a62fa1f470

Test: TreeHugger
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: I12e147e61febd96324cdbb6642e0894e5c399526

media_ndk_headers is not available to tethering apex.
But header files are available via libmediandk ndk_library

Test: m
Change-Id: I319d9f3a68c64d7b73af68db40d4a509eba59cd3

Test: ./update_results.sh
Change-Id: I02fb762d2a4af0fe5b200a9aafc6dee33d3eaed0

Test: ./update_results.sh
Change-Id: I4f02494448ede2eeefadbbb9c7c4fdf38ede645c

Test: ./update_results.sh
Change-Id: I2d1df64fe312806fc834d58847ba7f041e202fc3

Test: ./update_results.sh
Change-Id: Ibc2b3152ab68c5b46acff7d19d2c853889fa887c

This helps to know java_sources/java_actions are in which java group

Test: ./update_results.sh
Change-Id: Iec3fad1aded935a8d17184a2315d7f21b2a803f2

* changes:
  gn2bp: remove hardcoded jni_registration denylist
  gn2bp: add javacflag to skip GEN_JNI stub generation
  gn2bp: use Android libgtest_prod_headers
  gn2bp: depend on :current_android_jar for JNI generation

Test: m cronet_aml_java
Change-Id: I1470e1faa64f17729c63082228423f8177798d88

This conflicts as the fully-featured GEN_JNI is already generated by
another genrule.

Test: none
Change-Id: I522501444b02d2a304e81d86d86b0c8f3589035c

This requires aosp/2366787 to work.
Unfortunately, Chromium does not add a dependency on gtest, so
builtin_module cannot be used.
Using the gtest prod headers from Android is fine for //base. The only
thing that's used is gtest_prod.h, which includes one friend macro that
hasn't changed in 14 years.

Test: build cronet
Change-Id: I03b12ae698699527da7e69c9d4d50da1822fd5bc

Test: update_results.sh
Change-Id: Id08cb64c65cc2f2b2136d6e437ad8af1876da180