Allow blocking AG SCO connects by policy

Needed for devices that support both HFP AG and HFP HF.

btsnoop logs show the sequence of events leading to failure:
(corroborated by bt logcat)

1. ACL connection with remote phone established on handle 0x01
2. ACL connection with remote headset established on handle 0x02
3. Incoming call in HF role from phone
4. Phone call locally published to telecom
5. Answer incoming call
6. SCO connection established with phone in HF role
7. AG role with headset picks up on call state change to answered
   via BTA_AG_IN_CALL_CONN_RES
8. Inside handler for BTA_AG_IN_CALL_CONN_RES, bta_ag_sco_open called
   to establish the SCO connection in the AG role with the headset,
   stomping on the previous (wanted) SCO connection with the phone.

Fix is to publish the SCO audio route policy to fluoride, so we can
stop 8 from happening.

Bug: 32958838
Test: manual:
      received incoming call in HF role, audio worked both ways;
      recieved incoming MT call, headset audio in AG role worked both ways
Change-Id: I12961598e8200bd1d5adb46ee8ec3a802114b80a
6 files changed
tree: d620436cc946b3c53c1f16bea3a53414f4825353
  1. system/
  2. .clang-format
  3. .gitignore
  4. .gn
  5. Android.bp
  6. Android.mk
  7. BUILD.gn
  8. CleanSpec.mk
  9. EventLogTags.logtags
  10. MODULE_LICENSE_APACHE2
  11. NOTICE
  12. OWNERS
  13. PREUPLOAD.cfg
  14. README.md
README.md

Fluoride Bluetooth stack

Building and running on AOSP

Just build AOSP - Fluoride is there by default.

Building and running on Linux

Instructions for Ubuntu, tested on 14.04 with Clang 3.5.0 and 16.10 with Clang 3.8.0

Download source

mkdir ~/fluoride
cd ~/fluoride
git clone https://android.googlesource.com/platform/packages/modules/Bluetooth/system

Install dependencies (require sudo access):

cd ~/fluoride/bt
build/install_deps.sh

Then fetch third party dependencies:

cd ~/fluoride/bt
mkdir third_party
cd third_party
git clone https://github.com/google/googletest.git
git clone https://android.googlesource.com/platform/external/aac
git clone https://android.googlesource.com/platform/external/libchrome
git clone https://android.googlesource.com/platform/external/libldac
git clone https://android.googlesource.com/platform/external/modp_b64
git clone https://android.googlesource.com/platform/external/tinyxml2
git clone https://android.googlesource.com/platform/hardware/libhardware

And third party dependencies of third party dependencies:

cd fluoride/bt/third_party/libchrome/base/third_party
mkdir valgrind
cd valgrind
curl https://chromium.googlesource.com/chromium/src/base/+/master/third_party/valgrind/valgrind.h?format=TEXT | base64 -d > valgrind.h
curl https://chromium.googlesource.com/chromium/src/base/+/master/third_party/valgrind/memcheck.h?format=TEXT | base64 -d > memcheck.h

NOTE: If packages/modules/Bluetooth/system is checked out under AOSP, then create symbolic links instead of downloading sources

cd packages/modules/Bluetooth/system
mkdir third_party
cd third_party
ln -s ../../../external/aac aac
ln -s ../../../external/libchrome libchrome
ln -s ../../../external/libldac libldac
ln -s ../../../external/modp_b64 modp_b64
ln -s ../../../external/tinyxml2 tinyxml2
ln -s ../../../hardware/libhardware libhardware
ln -s ../../../external/googletest googletest

Generate your build files

cd ~/fluoride/bt
gn gen out/Default

Build

cd ~/fluoride/bt
ninja -C out/Default all

This will build all targets (the shared library, executables, tests, etc) and put them in out/Default. To build an individual target, replace "all" with the target of your choice, e.g. ninja -C out/Default net_test_osi.

Run

cd ~/fluoride/bt/out/Default
LD_LIBRARY_PATH=./ ./bluetoothtbd -create-ipc-socket=fluoride

Eclipse IDE Support

  1. Follows the Chromium project Eclipse Setup Instructions until "Optional: Building inside Eclipse" section (don't do that section, we will set it up differently)

  2. Generate Eclipse settings:

cd packages/modules/Bluetooth/system
gn gen --ide=eclipse out/Default
  1. In Eclipse, do File->Import->C/C++->C/C++ Project Settings, choose the XML location under packages/modules/Bluetooth/system/out/Default

  2. Right click on the project. Go to Preferences->C/C++ Build->Builder Settings. Uncheck "Use default build command", but instead using "ninja -C out/Default"

  3. Goto Behaviour tab, change clean command to "-t clean"