Google Git
Sign in
android / platform / packages / services / Car / 79c67d8b70
commit79c67d8b707d6035316443862e6caab26cf93ee0[log] [tgz]
authorSal Savage <salsavage@google.com>Thu Apr 14 15:49:35 2022 -0700
committerAndrew Cheng <chengandrew@google.com>Fri Aug 26 19:25:23 2022 +0000
tree50592d6cd7143e9af232ac51a21c4e37e3847883
parentd1b86fd2206ea16dbefef39addf8ce83c8050c49 [diff]
Re-evaluate the key material timeouts and lifecycle

This change brings our FastPair Provider more in line with a few
important line items in the spec and adds more logging to aid in
debugging future issues:
 - Key 'k' is held for up to 10 seconds while awaiting pairing. Pairing
   is indicated by the pin code arriving.
 - Once pairing begins we hold 'k' for 35 seconds to match the stack's
   pairing timeout, despite the fast pair spec suggesting we can hold it
   nearly indefinitely
 - A successful bond with a seeker results in us clearing our failure
   count now
 - 10 failed attempts causes a 5 minute timeout on all pairing attempts,
   per the spec.
 - Logging has been added to document key and key lifecycle changes.
   Null checks have been put in place to log encrypt and decrypt
   attempts that try to use an expired key.

Additionally, a few functions have been reworked to return responses
instead of using private class members. Functions have also been added
to abstract away dealing with keys.

Bug: 229271352
Test: atest CarServiceUnitTest
Test: atest FastPairGattServerTest
Change-Id: Icd81b63c805f9fe8f35620519e6753bc81e33274
2 files changed
tree: 50592d6cd7143e9af232ac51a21c4e37e3847883
  1. apex_car_framework/
  2. car-admin-ui-lib/
  3. car-builtin-lib/
  4. car-helper-lib/
  5. car-lib/
  6. car-lib-module/
  7. car-maps-placeholder/
  8. car-test-lib/
  9. car-usb-handler/
  10. car_product/
  11. cpp/
  12. data/
  13. experimental/
  14. FrameworkPackageStubs/
  15. obd2-lib/
  16. packages/
  17. procfs-inspector/
  18. service/
  19. service-builtin/
  20. tests/
  21. tools/
  22. vehicle-hal-support-lib/
  23. .clang-format
  24. .gitignore
  25. Android.mk
  26. CleanSpec.mk
  27. CPPLINT.cfg
  28. OWNERS
  29. OWNERS_networking
  30. PREUPLOAD.cfg
  31. README.md
  32. TEST_MAPPING
README.md

AAOS

Source code for Android Automotive OS.

Structure

car_product/           - AAOS product
car-builtin-lib/       - A helper library for CarService to access hidden
                         framework APIs
car-lib/               - Car API
car-lib-module/        - Car API module
cpp/                   - Native services
experimental/          - Experimental Car API and services
packages/              - Apps and services for cars
service/               - Car service module
service-builint        - Platform builtin component that runs CarService module
tests/                 - Tests and sample apps
tools/                 - Helper scripts

C++

Native (C++) code format is required to be compatible with .clang-format file. The formatter is already integrated to repo tool. To run manually, use:

git clang-format --style=file --extension='h,cpp,cc' HEAD~

Note that clang-format is not desirable for Android java files. Therefore the command line above is limited to specific extensions.

Debugging CarService

Dumpsys and car shell can be useful when debugging CarService integration issues.

dumpsys

adb shell dumpsys car_service # to dump all car service information
adb shell dumpsys car_service --services [service name] # to dump a specific service information
adb shell dumpsys car_service --list # get list of available services

Dumpsys for CarService includes the following (more information is availble in dumpsys, below are just highlights):

  • Enabled features
  • Current power policy and list of registered power policies
  • Power state of componens of power policy
  • Silent mode status
  • Garage mode status
  • I/O stats
  • List of available vehicle properties

car shell

adb shell cmd car_service

CarService supports commands via car shell:
(list is not complete, run adb shell cmd car_service -h for more details)

  • Injection of vhal events
  • Toggling garage mode on/off
  • Toggling of suspend/hibernation/resume
  • Injection of input events
  • User managemnet/switching
  • Power policy control/manipulation

Helpful command for Garage mode

Start Garage mode

adb shell cmd car_service garage-mode on

Finish Garage mode

adb shell cmd car_service garage-mode on

Get Garage mode status

adb shell cmd car_service garage-mode query

Change Garage mode max duration (only eng and debug builds)

adb shell setprop android.car.garagemodeduration <seconds>