* Assert Android API >= v21
This precedes a change that would otherwise break on older Android APIs,
but in a more obvious way.
* error if __ANDROID_API__ is not defined
* update all Andriod minSdkVersions to 21
* csharp experimental: android-19 to 21
Due to limitation of JVM, when user want to create binder channel in
threads created in unmanaged native code, they will need to call this
new API first to make sure Java helper classes can correctly be found.
Unused code in jni_utils.cc are also cleaned up in this commit
* [BinderTransport] Avoid depending on NdkBinder at compile time
We would like to make it possible to use BinderTransport in a APK that
has min sdk version lower than 29 (NdkBinder was introduced at 29)
We copies constants and type definitions from Ndk headers, creates a
same name wrapper for every NdkBinder API we use in
grpc_binder::ndk_util namespace.
We will try to load libbinder_ndk.so and resolve the symbol when the
NdkBinder API wrappers are invoked.
* regenerate projects
* Add GRPC_NO_BINDER guard
A config option is provided so user can pass --define=grpc_no_binder=true to bazel, or passing `-DGRPC_NO_BINDER` to compiler to disable the dependency.
* Expose experimental binder transport API
New headers are added
`grpcpp/create_channel_binder.h `: interfaces for creating client
channel
`grpcpp/security/binder_credentials.h`: interfaces for binder server
credentials
`grpcpp/security/binder_security_policy.h`: interfaces for binder
security policy, which is used by both server and client. Individual
security policies are merged into this single header.
Users can now depend on the `grpc++_binder` target to use the headers
listed above.
* Regenerate projects
* [BinderTransport] Create client channel instead of direct channel
In this commit we create a client channel instead of direct channel.
BinderConnector is added to connect subchannel when the user actually
make RPC call using the channel.
BindToOnDeviceServerService() is not required anymore since now the
actual connection is delay until the channel is used.
* Regenerate projects.
This commit
1. Implements the security policies that does not require JNI. This
includes a security policy that always allow connection and a security
policy that allows connection when remote UID is the same us local UID.
2. Add security policy as an argument in our interfaces. Old interfaces
are temporarily preserved so compilation will not suddenly break when we
import the code to internal repo.
3. Pumping the security policy from the public interfaces to the code
that handles SETUP_TRANSPORT transaction.
4. Abort the transport setup when the security policy is not satisfied.
Since meaningful tests will require to be run in real Android
environment, we will implement it later. For now, this change is
manually tested with example APKs.
For security policies that need to invoke Java to check authorization,
we will implement them in later.
Some code are commented out because the server interface has not been
merged yet.
After this, user should be able to install both apps on Android device
and test if basic unary call works or not
Also try use the API in example apk to make sure the binder transport
code and the rest of gRPC compiles with the Android toolchain
We will properly expose our interface later.
This commit adds an app that will be served as BinderTransport example
later.
Currently the app simply calls C++ function when button is pressed. In
the future the C++ function will run BinderTransport gRPC example
instead.
Tests not included in this commit, later we will add a build test to
CI to make sure this apk is always build-able. (This app will also be
used to make sure our BinderTransport implementation is compile-able
with Android toolchain, on GitHub) For now we exclude this target in
bazel build test.
Changes are made to WORKSPACE file in order to support android builds.
Build instructions are documented at
examples/android/binder/java/io/grpc/binder/cpp/example/README.md
AJ Heller
Ming-Chuan
Craig Tiller
Ta-Wei Tu
Nicolas Noble
Ming-Chuan
Esun Kim
Eric Gribkoff