webrtc/sdk/android
Jonas Oreland faf376cd7d Implement IsAdapterAvailable in AndroidNetworkMonitor
This cl/ fixes a race condition with the recent additions
to NetworkMonitorAutoDetect (getAllNetworksFromCache).

The getAllNetworksFromCache-feature uses the by the Android team preferred way of
enumerating networks, i.e to register network listeners.

This however introduces a unpleasant race condition like this:
1) network.cc discover rmnet0
2) BasicPortAllocator tries to create UDP port on rmnet0
- This fails as BindSocketToNetwork requires a android handle.
3) NetworkMonitorAutoDetect gets callback with rmnet0
4) BasicPortAllocator tries to create TCP port on rmnet0
- This succeeds.
5) Since rmnet0 has one working port, there will not be
any new ports created on that network

=> We end up with a TCP only connection :(

---

By impl. IsAdapterAvailable, we make sure that the network
will not be used by BasicPortAllocator (or anyone else!)
until we support binding to it.

The IsAdapterAvailable was implemented for IOS,
and has test coverage using FakeNetworkManager.

This cl/ is default enabled with the kill-switch
WebRTC-AndroidNetworkMonitor-IsAdapterAvailable.

Bug: webrtc:13741
Change-Id: I7c2cb7789660fd2e082c214d00e50c894666b07c
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/257400
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Commit-Queue: Jonas Oreland <jonaso@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#36406}
2022-04-01 13:16:26 +00:00
..
api/org/webrtc Fix string that will not make field trial parser crash (in debug) 2022-03-29 13:30:51 +00:00
instrumentationtests Fix string that will not make field trial parser crash (in debug) 2022-03-29 13:30:51 +00:00
native_api Remove more top-level const from parameters in function declarations 2022-02-01 09:15:50 +00:00
native_unittests Adopt absl::string_view in rtc_base/log_sinks 2022-03-14 12:47:55 +00:00
src Implement IsAdapterAvailable in AndroidNetworkMonitor 2022-04-01 13:16:26 +00:00
tests Use a standard Androidx test runner instead of the org.chromium one 2022-03-24 10:49:44 +00:00
AndroidManifest.xml Roll chromium_revision 4d95e6c77b..71a0e1904e (776481:782339) 2020-06-26 05:33:14 +00:00
BUILD.gn WebRTC-DeprecateGlobalFieldTrialString/Enabled/ - part 12/inf 2022-03-29 10:14:00 +00:00
OWNERS Remove redundant PRESUBMIT.py files. 2022-03-31 10:48:31 +00:00
README Updating android/README. 2018-03-01 20:22:48 +00:00

This directory holds a Java implementation of the webrtc::PeerConnection API, as
well as the JNI glue C++ code that lets the Java implementation reuse the C++
implementation of the same API.

To build the Java API and related tests, make sure you have a WebRTC checkout
with Android specific parts. This can be used for linux development as well by
configuring gn appropriately, as it is a superset of the webrtc checkout:
fetch --nohooks webrtc_android
gclient sync

You also must generate GN projects with:
--args='target_os="android" target_cpu="arm"'

More information on getting the code, compiling and running the AppRTCMobile
app can be found at:
https://webrtc.org/native-code/android/

To use the Java API, start by looking at the public interface of
org.webrtc.PeerConnection{,Factory} and the org.webrtc.PeerConnectionTest.

To understand the implementation of the API, see the native code in src/jni/pc/.