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Details

Type: Bug
Resolution: Done
Priority: P2: Important
Fix Version/s: 5.12.12, 5.15.2
Affects Version/s: 5.15.0
Component/s: Network
Labels:
None
Environment:

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Hardware:
* Google Pixel 4 running Android 11 Beta 3 (build number RPB3.200720.005)

Projects -> Android Qt 5.15.0 -> Build (Release
* Build Android APK -> Android build SDK -> select "android-30"

Qt -> Preferences -> Devices:
* JDK location: /Library/Java/JavaVirtualMachines/jdk-11.0.8.jdk/Contents/Home
* Installed Packages (SDK Manager)
  * NDK (Side by side) 21.1.6352462
  * Android SDK Build-Tools 28.0.3
  * Android SDK Tools 26.1.1
  * Android SDK Platform-Tools 30.0.4
  * Android SDK Command-line Tools (latest) 2.1
  * Android 11 -> SDK Platform

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Hardware: * Google Pixel 4 running Android 11 Beta 3 (build number RPB3.200720.005) Projects -> Android Qt 5.15.0 -> Build (Release * Build Android APK -> Android build SDK -> select "android-30" Qt -> Preferences -> Devices: * JDK location: /Library/Java/JavaVirtualMachines/jdk-11.0.8.jdk/Contents/Home * Installed Packages (SDK Manager)   * NDK (Side by side) 21.1.6352462   * Android SDK Build-Tools 28.0.3   * Android SDK Tools 26.1.1   * Android SDK Platform-Tools 30.0.4   * Android SDK Command-line Tools (latest) 2.1   * Android 11 -> SDK Platform

Platform/s:

Android
Commits:
e33d40a88476e8a9d4f950fb285c75d0c1a92a2e (qt/qtbase/dev) c07eff7d9477a5a098c76fb2107d9f902c2999ac (qt/qtbase/5.15) ab4e78b435bbd08b2b00f86360c729519846eeaf (qt/qtbase/5.12)

Description

Android 11 introduces changes related to MAC addresses that break the functionality of the following QNetworkInterface member functions:

QNetworkInterface::interfaceFromName(const QString &name)
QNetworkInterface::interfaceFromIndex(int index)
QNetworkInterface::allInterfaces()
QNetworkInterface::allAddresses()

The reason for the break is that when targeting API 30 or higher, android blocks RTM_GETLINK netlink messages (Source).
Maybe this is the corresponding commit for the android sources: Source

All of the above mentioned functions end up in calling the function getInterfaces(int sock, char *buf) in qtbase/src/network/kernel/qnetworkinterface_linux.cpp

As the netlink request with RTM_GETLINK is blocked, no interfaces are returned by this function.

When calling QNetworkInterface::allInterfaces(), the function scan() also calls getAddresses(...) that successfully gets the available ip addresses with the corresponding interfaces. As it tries to check against the previously (not) found interfaces (that couldn't be catched), it generates the warnings that can be seen in the logcat of the attached example.

I rkinterfacetes: Late-enabling -Xcheck:jni
I rkinterfacetes: Unquickening 12 vdex files!
D ApplicationLoaders: Returning zygote-cached class loader: /system/framework/android.test.base.jar
D NetworkSecurityConfig: No Network Security Config specified, using platform default
D NetworkSecurityConfig: No Network Security Config specified, using platform default
W System  : ClassLoader referenced unknown path:
I QtCore  : Start
I Qt      : qt started
I AdrenoGLES-0: QUALCOMM build                   : f84f8da, Ie73904e3bd
I AdrenoGLES-0: Build Date                       : 06/24/20
I AdrenoGLES-0: OpenGL ES Shader Compiler Version: EV031.31.04.00
I AdrenoGLES-0: Local Branch                     : gfx-adreno.lnx.2.0
I AdrenoGLES-0: Remote Branch                    : quic/gfx-adreno.lnx.2.0
I AdrenoGLES-0: Remote Branch                    : NONE
I AdrenoGLES-0: Reconstruct Branch               : NOTHING
I AdrenoGLES-0: Build Config                     : S P 10.0.4 AArch32
I AdrenoGLES-0: Driver Path                      : /vendor/lib/egl/libGLESv2_adreno.so
I AdrenoGLES-0: PFP: 0x016ee189, ME: 0x00000000
W AdrenoUtils: <ReadGpuID_from_sysfs:197>: Failed to open /sys/class/kgsl/kgsl-3d0/gpu_model
W AdrenoUtils: <ReadGpuID:221>: Failed to read chip ID from gpu_model. Fallback to use the GSL path
I Gralloc4: mapper 4.x is not supported
W qtMainLoopThrea: type=1400 audit(0.0:74932): avc: denied { nlmsg_readpriv } for scontext=u:r:untrusted_app:s0:c30,c257,c512,c768 tcontext=u:r:untrusted_app:s0:c30,c257,c512,c768 tclass=netlink_route_socket permissive=0 b/155595000 app=org.qtproject.networkinterfacetest
W         : QNetworkInterface/AF_NETLINK: found unknown interface with index 1
W         : QNetworkInterface/AF_NETLINK: found unknown interface with index 30
W         : QNetworkInterface/AF_NETLINK: found unknown interface with index 1
W         : QNetworkInterface/AF_NETLINK: found unknown interface with index 3
W         : QNetworkInterface/AF_NETLINK: found unknown interface with index 10
W         : QNetworkInterface/AF_NETLINK: found unknown interface with index 21
W         : QNetworkInterface/AF_NETLINK: found unknown interface with index 30
W         : exit app 0
"org.qtproject.networkinterfacetest" died.

Maybe this is related to ~~QTBUG-78659~~.

Attachments

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NativeNetworkInterfaceTest.zip
142 kB
03 Sep '20 09:24
QNetworkInterfaceTest.zip
59 kB
02 Sep '20 12:43

Issue Links

resulted in

QTBUG-96974 QNetworkInterface::Unknown for all interfaces on Android 11

Reported

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For Gerrit Dashboard: QTBUG-86394
#	Subject	Branch	Project	Status	CR	V
312681,2	QNetworkInterface: disable Netlink-based Linux support on Android	dev	qt/qtbase	Status: MERGED	+2	0
312941,1	QNetworkInterface: disable Netlink-based Linux support on Android	5.15.1	qt/qtbase	Status: ABANDONED	+2	0
312942,2	QNetworkInterface: disable Netlink-based Linux support on Android	5.15	qt/qtbase	Status: MERGED	+2	0
370351,2	QNetworkInterface: disable Netlink-based Linux support on Android	5.12	qt/qtbase	Status: MERGED	-1	0