x/mobile: fix net.Interface() and net.InterfaceAddrs() in Android11 version #61089

wlynxg · 2023-06-30T16:37:53Z

For #40569
Fix: In response to the modifications made to the permissions for accessing system MAC addresses in Android 11, ordinary applications encounter several main issues when using NETLINK sockets:

Not allowing bind operations on NETLINK sockets.
Not permitting the use of the RTM_GETLINK functionality.

For detailed information, please refer to: https://developer.android.com/training/articles/user-data-ids#mac-11-plus

As a result of the aforementioned reasons, using net.Interfaces() and net.InterfaceAddrs() from the Go net package in the Android environment leads to the route ip+net: netlinkrib: permission denied error.

You can find specific issue details here: #40569

To address the issue of using the Go net package in the Android environment, we have made partial modifications to its source code to ensure proper functionality on Android.

I have fully resolved the issues with net.InterfaceAddrs().

However, for net.Interfaces(), we have only addressed some problems, as the following issues still remain:

It can only return interfaces with IP addresses.
It cannot return hardware MAC addresses.

Nevertheless, the fixed net.Interfaces() function now aligns with the Android API's NetworkInterface.getNetworkInterfaces() and can be used normally in most scenarios.

The specific fix logic includes:

Removing the Bind() operation on Netlink sockets in the NetlinkRIB() function.
Using ioctl based on the Index number returned by RTM_GETADDR to retrieve the network card's name, MTU, and flags.

Test Code

This part of the test code must be compiled into a jar and aar package that can be used under the Android 11 platform using gomobile

use net.InterfaceAddrs() :

func NetInterfaceAddrs() {
	addrs, err := net.InterfaceAddrs()
	if err != nil {
		panic(err)
	}

	for _, addr := range addrs {
		log.Println(addr)
	}
}

result:

127.0.0.1/8
::1/128
...
192.168.6.143/24
fe80::7e4f:4446:eb3:1eb8/64

use net.Interfaces() :

func NetInterface() {
	interfaces, err := net.Interfaces()
	if err != nil {
		panic(err)
	}

	for _, i := range interfaces {
		log.Println(i)
	}
}

result:

{1 65536 lo  up|loopback|running}
{15 1400 rmnet_data1  up|running}
{24 1500 wlan0  up|broadcast|multicast|running}
{3 1500 dummy0  up|broadcast|running}
{4 1500 ifb0  up|broadcast|running}
{5 1500 ifb1  up|broadcast|running}
{12 1500 ifb2  up|broadcast|running}
{14 1500 rmnet_data0  up|running}
{16 1400 rmnet_data2  up|running}
{17 1400 rmnet_data3  up|running}

gopherbot · 2023-06-30T16:46:08Z

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gopherbot · 2023-06-30T16:52:25Z

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gopherbot · 2023-07-02T13:31:37Z

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gopherbot · 2023-07-03T12:31:34Z

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gopherbot · 2023-07-06T15:53:12Z

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gopherbot · 2023-07-25T19:02:53Z

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gopherbot · 2023-08-28T04:25:57Z

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gopherbot · 2023-10-19T16:35:08Z

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gopherbot · 2023-11-14T08:52:44Z

This PR (HEAD: bff8d40) has been imported to Gerrit for code review.

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vikulin · 2024-05-25T14:30:37Z

This PR (HEAD: bff8d40) has been imported to Gerrit for code review.

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* You need a Gmail or other Google account to [log in to Gerrit](https://go-review.googlesource.com/login/).

* To change your code in response to feedback:
  
  * Push a new commit to the branch used by your GitHub PR.
  * A new "patch set" will then appear in Gerrit.
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  * Multiple commits in the PR will be squashed by GerritBot.

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@gopherbot with all respect but last activity in Gerrit was at Oct 19, 2023. I assume that work was suspended.

vikulin · 2024-05-25T14:31:26Z

Any updates?

wlynxg · 2024-05-25T14:36:59Z

Any updates?

I think the go official team may not accept this PR, because this fix may become invalid with later Android updates, and it may be too troublesome for the go team to maintain such a changing system problem. My suggestion is that you can use my third-party library or compile Go yourself to resolve this bug.

vikulin · 2024-05-25T14:43:18Z

@wlynxg could you please provide a link to the 3party lib?

wlynxg · 2024-05-25T14:44:57Z

@wlynxg could you please provide a link to the 3party lib?

https://github.com/wlynxg/anet

vikulin · 2024-05-25T14:54:15Z

@wlynxg could you please provide a link to the 3party lib?

https://github.com/wlynxg/anet

Good job!

vikulin · 2024-06-15T15:24:53Z

Unfortunately I'm unable to verify this fix since gomobile broken in go1.20 and above.

vikulin · 2024-06-17T11:42:38Z

@wlynxg could you please provide a link to the 3party lib?

https://github.com/wlynxg/anet

The fix did not work for me: I got permission denied error in Android logs:

2024-06-17 14:38:47.641 15709-15792 GoLog                   org.rivchain.cuplink                 I  Failed up get addresses for interface wlan0: route ip+net: netlinkrib: permission denied
2024-06-17 14:38:47.637 15709-15709 ivchain.cuplink         org.rivchain.cuplink                 W  type=1400 audit(0.0:1139327): avc:  denied  { bind } for  scontext=u:r:untrusted_app:s0:c178,c257,c512,c768 tcontext=u:r:untrusted_app:s0:c178,c257,c512,c768 tclass=netlink_route_socket permissive=0 bug=b/155595000 app=org.rivchain.cuplink
2024-06-17 14:38:48.647 15709-15770 GoLog                   org.rivchain.cuplink                 I  Failed up get addresses for interface wlan0: route ip+net: netlinkrib: permission denied
2024-06-17 14:38:48.645 15709-15709 ivchain.cuplink         org.rivchain.cuplink                 W  type=1400 audit(0.0:1139328): avc:  denied  { bind } for  scontext=u:r:untrusted_app:s0:c178,c257,c512,c768 tcontext=u:r:untrusted_app:s0:c178,c257,c512,c768 tclass=netlink_route_socket permissive=0 bug=b/155595000 app=org.rivchain.cuplink
2024-06-17 14:38:49.658 15709-15770 GoLog                   org.rivchain.cuplink                 I  Failed up get addresses for interface wlan0: route ip+net: netlinkrib: permission denied

I have changed the net to anet package.

wlynxg · 2024-06-17T11:45:22Z

@wlynxg could you please provide a link to the 3party lib?

https://github.com/wlynxg/anet

The fix did not work for me: I got permission denied error in Android logs:

2024-06-17 14:38:47.641 15709-15792 GoLog                   org.rivchain.cuplink                 I  Failed up get addresses for interface wlan0: route ip+net: netlinkrib: permission denied
2024-06-17 14:38:47.637 15709-15709 ivchain.cuplink         org.rivchain.cuplink                 W  type=1400 audit(0.0:1139327): avc:  denied  { bind } for  scontext=u:r:untrusted_app:s0:c178,c257,c512,c768 tcontext=u:r:untrusted_app:s0:c178,c257,c512,c768 tclass=netlink_route_socket permissive=0 bug=b/155595000 app=org.rivchain.cuplink
2024-06-17 14:38:48.647 15709-15770 GoLog                   org.rivchain.cuplink                 I  Failed up get addresses for interface wlan0: route ip+net: netlinkrib: permission denied
2024-06-17 14:38:48.645 15709-15709 ivchain.cuplink         org.rivchain.cuplink                 W  type=1400 audit(0.0:1139328): avc:  denied  { bind } for  scontext=u:r:untrusted_app:s0:c178,c257,c512,c768 tcontext=u:r:untrusted_app:s0:c178,c257,c512,c768 tclass=netlink_route_socket permissive=0 bug=b/155595000 app=org.rivchain.cuplink
2024-06-17 14:38:49.658 15709-15770 GoLog                   org.rivchain.cuplink                 I  Failed up get addresses for interface wlan0: route ip+net: netlinkrib: permission denied

I have changed the net to anet package.

If you are willing to provide your minimum executable code, I will be happy to help you solve the problem. You can send it directly to me through the email address on my homepage.

vikulin · 2024-06-17T11:47:21Z

@wlynxg could you please provide a link to the 3party lib?

https://github.com/wlynxg/anet

The fix did not work for me: I got permission denied error in Android logs:

2024-06-17 14:38:47.641 15709-15792 GoLog                   org.rivchain.cuplink                 I  Failed up get addresses for interface wlan0: route ip+net: netlinkrib: permission denied
2024-06-17 14:38:47.637 15709-15709 ivchain.cuplink         org.rivchain.cuplink                 W  type=1400 audit(0.0:1139327): avc:  denied  { bind } for  scontext=u:r:untrusted_app:s0:c178,c257,c512,c768 tcontext=u:r:untrusted_app:s0:c178,c257,c512,c768 tclass=netlink_route_socket permissive=0 bug=b/155595000 app=org.rivchain.cuplink
2024-06-17 14:38:48.647 15709-15770 GoLog                   org.rivchain.cuplink                 I  Failed up get addresses for interface wlan0: route ip+net: netlinkrib: permission denied
2024-06-17 14:38:48.645 15709-15709 ivchain.cuplink         org.rivchain.cuplink                 W  type=1400 audit(0.0:1139328): avc:  denied  { bind } for  scontext=u:r:untrusted_app:s0:c178,c257,c512,c768 tcontext=u:r:untrusted_app:s0:c178,c257,c512,c768 tclass=netlink_route_socket permissive=0 bug=b/155595000 app=org.rivchain.cuplink
2024-06-17 14:38:49.658 15709-15770 GoLog                   org.rivchain.cuplink                 I  Failed up get addresses for interface wlan0: route ip+net: netlinkrib: permission denied

I have changed the net to anet package.

If you are willing to provide your minimum executable code, I will be happy to help you solve the problem. You can send it directly to me through the email address on my homepage.

Thank you for your so quick reply. I'm sending you more details as you have requested.

vikulin · 2024-06-17T12:37:58Z

@wlynxg could you please provide a link to the 3party lib?

https://github.com/wlynxg/anet

The fix did not work for me: I got permission denied error in Android logs:

2024-06-17 14:38:47.641 15709-15792 GoLog                   org.rivchain.cuplink                 I  Failed up get addresses for interface wlan0: route ip+net: netlinkrib: permission denied
2024-06-17 14:38:47.637 15709-15709 ivchain.cuplink         org.rivchain.cuplink                 W  type=1400 audit(0.0:1139327): avc:  denied  { bind } for  scontext=u:r:untrusted_app:s0:c178,c257,c512,c768 tcontext=u:r:untrusted_app:s0:c178,c257,c512,c768 tclass=netlink_route_socket permissive=0 bug=b/155595000 app=org.rivchain.cuplink
2024-06-17 14:38:48.647 15709-15770 GoLog                   org.rivchain.cuplink                 I  Failed up get addresses for interface wlan0: route ip+net: netlinkrib: permission denied
2024-06-17 14:38:48.645 15709-15709 ivchain.cuplink         org.rivchain.cuplink                 W  type=1400 audit(0.0:1139328): avc:  denied  { bind } for  scontext=u:r:untrusted_app:s0:c178,c257,c512,c768 tcontext=u:r:untrusted_app:s0:c178,c257,c512,c768 tclass=netlink_route_socket permissive=0 bug=b/155595000 app=org.rivchain.cuplink
2024-06-17 14:38:49.658 15709-15770 GoLog                   org.rivchain.cuplink                 I  Failed up get addresses for interface wlan0: route ip+net: netlinkrib: permission denied

I have changed the net to anet package.

If you are willing to provide your minimum executable code, I will be happy to help you solve the problem. You can send it directly to me through the email address on my homepage.

I'm not sure but I think the problem in targetSdkVersion 34. Here is a report for fix in Android API 30 but for API 34 it fails.

vikulin · 2024-06-17T16:14:38Z

@wlynxg I created a demo project for you to show the result:

https://github.com/vikulin/gomobile/blob/main/libmodule/src/go/mobile/hello.go

anet.Interfaces() returns an empty array for a HW device (Pixel 7a, Android 14). No errors in logs:

Put aar file in libs folder and build it.

Result:

2024-06-17 18:52:57.150 12859-12859 VRI[MainActivity]       org.golang.example.android           D  visibilityChanged oldVisibility=true newVisibility=false
2024-06-17 18:52:57.178 12859-12859 VRI[MainActivity]       org.golang.example.android           D  Not drawing due to not visible
2024-06-17 18:52:57.202 12859-12859 WindowOnBackDispatcher  org.golang.example.android           W  sendCancelIfRunning: isInProgress=falsecallback=android.view.ViewRootImpl$$ExternalSyntheticLambda11@364958e
2024-06-17 19:04:01.324 14203-14203 example.android         org.golang.example.android           I  Late-enabling -Xcheck:jni
2024-06-17 19:04:01.342 14203-14203 example.android         org.golang.example.android           I  Using CollectorTypeCMC GC.
2024-06-17 19:04:01.363 14203-14203 Compatibil...geReporter org.golang.example.android           D  Compat change id reported: 171979766; UID 10436; state: ENABLED
2024-06-17 19:04:01.363 14203-14203 Compatibil...geReporter org.golang.example.android           D  Compat change id reported: 242716250; UID 10436; state: ENABLED
2024-06-17 19:04:01.372 14203-14203 ziparchive              org.golang.example.android           W  Unable to open '/data/app/~~CyjYR5e7Zc_jAAV-FOyMmA==/org.golang.example.android-kdOlYbN0LSPbhv9oYLgzgg==/base.dm': No such file or directory
2024-06-17 19:04:01.372 14203-14203 ziparchive              org.golang.example.android           W  Unable to open '/data/app/~~CyjYR5e7Zc_jAAV-FOyMmA==/org.golang.example.android-kdOlYbN0LSPbhv9oYLgzgg==/base.dm': No such file or directory
2024-06-17 19:04:01.375 14203-14203 nativeloader            org.golang.example.android           D  Configuring clns-4 for other apk /data/app/~~CyjYR5e7Zc_jAAV-FOyMmA==/org.golang.example.android-kdOlYbN0LSPbhv9oYLgzgg==/base.apk. target_sdk_version=34, uses_libraries=, library_path=/data/app/~~CyjYR5e7Zc_jAAV-FOyMmA==/org.golang.example.android-kdOlYbN0LSPbhv9oYLgzgg==/lib/arm64:/data/app/~~CyjYR5e7Zc_jAAV-FOyMmA==/org.golang.example.android-kdOlYbN0LSPbhv9oYLgzgg==/base.apk!/lib/arm64-v8a, permitted_path=/data:/mnt/expand:/data/user/0/org.golang.example.android
2024-06-17 19:04:01.386 14203-14203 GraphicsEnvironment     org.golang.example.android           V  Currently set values for:
2024-06-17 19:04:01.386 14203-14203 GraphicsEnvironment     org.golang.example.android           V    angle_gl_driver_selection_pkgs=[]
2024-06-17 19:04:01.386 14203-14203 GraphicsEnvironment     org.golang.example.android           V    angle_gl_driver_selection_values=[]
2024-06-17 19:04:01.386 14203-14203 GraphicsEnvironment     org.golang.example.android           V  Global.Settings values are invalid: number of packages: 0, number of values: 0
2024-06-17 19:04:01.386 14203-14203 GraphicsEnvironment     org.golang.example.android           V  Neither updatable production driver nor prerelease driver is supported.
2024-06-17 19:04:01.407 14203-14237 vulkan                  org.golang.example.android           D  searching for layers in '/data/app/~~CyjYR5e7Zc_jAAV-FOyMmA==/org.golang.example.android-kdOlYbN0LSPbhv9oYLgzgg==/lib/arm64'
2024-06-17 19:04:01.407 14203-14237 vulkan                  org.golang.example.android           D  searching for layers in '/data/app/~~CyjYR5e7Zc_jAAV-FOyMmA==/org.golang.example.android-kdOlYbN0LSPbhv9oYLgzgg==/base.apk!/lib/arm64-v8a'
2024-06-17 19:04:01.422 14203-14203 Compatibil...geReporter org.golang.example.android           D  Compat change id reported: 309578419; UID 10436; state: DISABLED
2024-06-17 19:04:01.429 14203-14203 Compatibil...geReporter org.golang.example.android           D  Compat change id reported: 279646685; UID 10436; state: DISABLED
2024-06-17 19:04:01.431 14203-14203 Compatibil...geReporter org.golang.example.android           D  Compat change id reported: 232195501; UID 10436; state: DISABLED
2024-06-17 19:04:01.446 14203-14203 Compatibil...geReporter org.golang.example.android           D  Compat change id reported: 210923482; UID 10436; state: ENABLED
2024-06-17 19:04:01.446 14203-14203 Compatibil...geReporter org.golang.example.android           D  Compat change id reported: 63938206; UID 10436; state: DISABLED
2024-06-17 19:04:01.458 14203-14203 Compatibil...geReporter org.golang.example.android           D  Compat change id reported: 237531167; UID 10436; state: DISABLED
2024-06-17 19:04:01.581 14203-14203 VRI[MainActivity]       org.golang.example.android           D  Not drawing due to not visible
2024-06-17 19:04:11.551 14203-14203 VRI[MainActivity]       org.golang.example.android           D  Start draw after previous draw not visible
2024-06-17 19:04:33.136 14203-14215 example.android         org.golang.example.android           I  Background concurrent mark compact GC freed 14171(8478KB) AllocSpace objects, 3(60KB) LOS objects, 91% free, 2212KB/26MB, paused 891us,9.637ms total 100.266ms
2024-06-17 19:04:42.507 14203-14203 VRI[MainActivity]       org.golang.example.android           D  visibilityChanged oldVisibility=true newVisibility=false
2024-06-17 19:04:42.548 14203-14203 VRI[MainActivity]       org.golang.example.android           D  Not drawing due to not visible
2024-06-17 19:05:06.570 14203-14203 VRI[MainActivity]       org.golang.example.android           D  Start draw after previous draw not visible
2024-06-17 19:05:30.173 14632-14632 Compatibil...geReporter org.golang.example.android           D  Compat change id reported: 210923482; UID 10436; state: ENABLED
2024-06-17 19:05:30.174 14632-14632 Compatibil...geReporter org.golang.example.android           D  Compat change id reported: 63938206; UID 10436; state: DISABLED
2024-06-17 19:05:30.186 14632-14632 Compatibil...geReporter org.golang.example.android           D  Compat change id reported: 237531167; UID 10436; state: DISABLED
2024-06-17 19:07:53.485 14632-14632 VRI[MainActivity]       org.golang.example.android           D  visibilityChanged oldVisibility=true newVisibility=false
2024-06-17 19:07:53.531 14632-14632 VRI[MainActivity]       org.golang.example.android           D  Not drawing due to not visible

vikulin · 2024-06-17T16:27:02Z

This is an output for net.Interfaces() package:

wlynxg · 2024-06-18T01:39:43Z

@wlynxg I created a demo project for you to show the result:

https://github.com/vikulin/gomobile/blob/main/libmodule/src/go/mobile/hello.go

anet.Interfaces() returns an empty array for a HW device (Pixel 7a, Android 14). No errors in logs:

Put aar file in libs folder and build it.

Result:
``` 2024-06-17 18:52:57.150 12859-12859 VRI[MainActivity] org.golang.example.android D visibilityChanged oldVisibility=true newVisibility=false 2024-06-17 18:52:57.178 12859-12859 VRI[MainActivity] org.golang.example.android D Not drawing due to not visible 2024-06-17 18:52:57.202 12859-12859 WindowOnBackDispatcher org.golang.example.android W sendCancelIfRunning: isInProgress=falsecallback=android.view.ViewRootImpl$$ExternalSyntheticLambda11@364958e 2024-06-17 19:04:01.324 14203-14203 example.android org.golang.example.android I Late-enabling -Xcheck:jni 2024-06-17 19:04:01.342 14203-14203 example.android org.golang.example.android I Using CollectorTypeCMC GC. 2024-06-17 19:04:01.363 14203-14203 Compatibil...geReporter org.golang.example.android D Compat change id reported: 171979766; UID 10436; state: ENABLED 2024-06-17 19:04:01.363 14203-14203 Compatibil...geReporter org.golang.example.android D Compat change id reported: 242716250; UID 10436; state: ENABLED 2024-06-17 19:04:01.372 14203-14203 ziparchive org.golang.example.android W Unable to open '/data/app/~~CyjYR5e7Zc_jAAV-FOyMmA==/org.golang.example.android-kdOlYbN0LSPbhv9oYLgzgg==/base.dm': No such file or directory 2024-06-17 19:04:01.372 14203-14203 ziparchive org.golang.example.android W Unable to open '/data/app/~~CyjYR5e7Zc_jAAV-FOyMmA==/org.golang.example.android-kdOlYbN0LSPbhv9oYLgzgg==/base.dm': No such file or directory 2024-06-17 19:04:01.375 14203-14203 nativeloader org.golang.example.android D Configuring clns-4 for other apk /data/app/~~CyjYR5e7Zc_jAAV-FOyMmA==/org.golang.example.android-kdOlYbN0LSPbhv9oYLgzgg==/base.apk. target_sdk_version=34, uses_libraries=, library_path=/data/app/~~CyjYR5e7Zc_jAAV-FOyMmA==/org.golang.example.android-kdOlYbN0LSPbhv9oYLgzgg==/lib/arm64:/data/app/~~CyjYR5e7Zc_jAAV-FOyMmA==/org.golang.example.android-kdOlYbN0LSPbhv9oYLgzgg==/base.apk!/lib/arm64-v8a, permitted_path=/data:/mnt/expand:/data/user/0/org.golang.example.android 2024-06-17 19:04:01.386 14203-14203 GraphicsEnvironment org.golang.example.android V Currently set values for: 2024-06-17 19:04:01.386 14203-14203 GraphicsEnvironment org.golang.example.android V angle_gl_driver_selection_pkgs=[] 2024-06-17 19:04:01.386 14203-14203 GraphicsEnvironment org.golang.example.android V angle_gl_driver_selection_values=[] 2024-06-17 19:04:01.386 14203-14203 GraphicsEnvironment org.golang.example.android V Global.Settings values are invalid: number of packages: 0, number of values: 0 2024-06-17 19:04:01.386 14203-14203 GraphicsEnvironment org.golang.example.android V Neither updatable production driver nor prerelease driver is supported. 2024-06-17 19:04:01.407 14203-14237 vulkan org.golang.example.android D searching for layers in '/data/app/~~CyjYR5e7Zc_jAAV-FOyMmA==/org.golang.example.android-kdOlYbN0LSPbhv9oYLgzgg==/lib/arm64' 2024-06-17 19:04:01.407 14203-14237 vulkan org.golang.example.android D searching for layers in '/data/app/~~CyjYR5e7Zc_jAAV-FOyMmA==/org.golang.example.android-kdOlYbN0LSPbhv9oYLgzgg==/base.apk!/lib/arm64-v8a' 2024-06-17 19:04:01.422 14203-14203 Compatibil...geReporter org.golang.example.android D Compat change id reported: 309578419; UID 10436; state: DISABLED 2024-06-17 19:04:01.429 14203-14203 Compatibil...geReporter org.golang.example.android D Compat change id reported: 279646685; UID 10436; state: DISABLED 2024-06-17 19:04:01.431 14203-14203 Compatibil...geReporter org.golang.example.android D Compat change id reported: 232195501; UID 10436; state: DISABLED 2024-06-17 19:04:01.446 14203-14203 Compatibil...geReporter org.golang.example.android D Compat change id reported: 210923482; UID 10436; state: ENABLED 2024-06-17 19:04:01.446 14203-14203 Compatibil...geReporter org.golang.example.android D Compat change id reported: 63938206; UID 10436; state: DISABLED 2024-06-17 19:04:01.458 14203-14203 Compatibil...geReporter org.golang.example.android D Compat change id reported: 237531167; UID 10436; state: DISABLED 2024-06-17 19:04:01.581 14203-14203 VRI[MainActivity] org.golang.example.android D Not drawing due to not visible 2024-06-17 19:04:11.551 14203-14203 VRI[MainActivity] org.golang.example.android D Start draw after previous draw not visible 2024-06-17 19:04:33.136 14203-14215 example.android org.golang.example.android I Background concurrent mark compact GC freed 14171(8478KB) AllocSpace objects, 3(60KB) LOS objects, 91% free, 2212KB/26MB, paused 891us,9.637ms total 100.266ms 2024-06-17 19:04:42.507 14203-14203 VRI[MainActivity] org.golang.example.android D visibilityChanged oldVisibility=true newVisibility=false 2024-06-17 19:04:42.548 14203-14203 VRI[MainActivity] org.golang.example.android D Not drawing due to not visible 2024-06-17 19:05:06.570 14203-14203 VRI[MainActivity] org.golang.example.android D Start draw after previous draw not visible 2024-06-17 19:05:30.173 14632-14632 Compatibil...geReporter org.golang.example.android D Compat change id reported: 210923482; UID 10436; state: ENABLED 2024-06-17 19:05:30.174 14632-14632 Compatibil...geReporter org.golang.example.android D Compat change id reported: 63938206; UID 10436; state: DISABLED 2024-06-17 19:05:30.186 14632-14632 Compatibil...geReporter org.golang.example.android D Compat change id reported: 237531167; UID 10436; state: DISABLED 2024-06-17 19:07:53.485 14632-14632 VRI[MainActivity] org.golang.example.android D visibilityChanged oldVisibility=true newVisibility=false 2024-06-17 19:07:53.531 14632-14632 VRI[MainActivity] org.golang.example.android D Not drawing due to not visible ```

Your problem is due to not configuring the Android app's permissions, you need to add this line:

<uses-permission android:name="android.permission.INTERNET" />

vikulin · 2024-06-18T08:26:23Z

@wlynxg yes, you are right. Let me correct this.

vikulin · 2024-06-18T10:10:27Z

@wlynxg corrected permissions and found the code where the error is getting from: it's in iface.Addrs()

Result:

Now the defect is fully explained and ready for a fix.

wlynxg · 2024-06-18T10:18:13Z

@vikulin You need to use https://pkg.go.dev/github.com/wlynxg/anet#InterfaceAddrsByInterface to get the correct address.

vikulin · 2024-06-18T11:49:17Z

@wlynxg I've added this method as you have suggested and got an empty response for every interface and permission errors when SetAndroidVersion added prior the call.

Result:

wlynxg · 2024-06-18T11:56:54Z

@vikulin I'm sorry, there is a bug in my library, I will fix it soon.

vikulin · 2024-06-18T13:08:33Z

@vikulin I'm sorry, there is a bug in my library, I will fix it soon.

How may I help you to get it working?

wlynxg · 2024-06-19T01:39:11Z

@vikulin I'm sorry, there is a bug in my library, I will fix it soon.

How may I help you to get it working?

Sorry. It was late yesterday. I have fixed the bug today.

vikulin · 2024-06-19T09:27:21Z

@wlynxg the fix confirmed. Could you please use Android API version number instead of Android version in https://github.com/wlynxg/anet/blob/v0.0.2/interface.go#L30 ?

lawndoc · 2024-07-15T01:58:17Z

Is this PR going to be come back to? This causes issues with a lot of go-based apps in Termux. It looks like there were a couple of comments that have yet to be addressed:

https://go-review.googlesource.com/c/go/+/507415/3/src/syscall/netlink_linux.go
https://go-review.googlesource.com/c/go/+/507415/3/src/net/interface_linux.go

@wlynxg's library is great, but native support for basic networking functionality like this should be the goal for a cross-platform language like Go.

wlynxg · 2024-07-19T09:41:02Z

Is this PR going to be come back to? This causes issues with a lot of go-based apps in Termux. It looks like there were a couple of comments that have yet to be addressed:

https://go-review.googlesource.com/c/go/+/507415/3/src/syscall/netlink_linux.go https://go-review.googlesource.com/c/go/+/507415/3/src/net/interface_linux.go

@wlynxg's library is great, but native support for basic networking functionality like this should be the goal for a cross-platform language like Go.

The two issues have been fixed and explained in subsequent submissions.
For this submission, I feel it will be difficult to merge it into the official version because it is related to the Android platform. I personally recommend using a third-party library to solve this problem: https://github.com/wlynxg/anet.

wlynxg · 2024-07-19T09:43:05Z

Android API version

Android API version does not seem to be related to this issue, as the issue is caused by Android SELinux.

fix: get network card interface in Android 11 environment

1012c07

x/mobile: fix net.Interface() and net.InterfaceAddrs() in Android11 v…

a64399c

…ersion

wlynxg changed the title ~~fix: get network card interface in Android 11 environment~~ 发、ix net.Interface() and net.InterfaceAddrs() in Android11 version Jul 2, 2023

wlynxg changed the title ~~发、ix net.Interface() and net.InterfaceAddrs() in Android11 version~~ x/mobile: fix net.Interface() and net.InterfaceAddrs() in Android11 version Jul 2, 2023

lovishpuri mentioned this pull request Aug 5, 2023

x/mobile: Calling net.InterfaceAddrs() fails on Android SDK 30 #40569

Open

fix: circular reference problem

ad4f8ff

wlynxg force-pushed the master branch from 73f3397 to ad4f8ff Compare August 28, 2023 04:22

This was referenced Sep 10, 2023

lib/beacon, lib/discover: Send IPv4 limited broadcast when address listing fails (fixes #1628) syncthing/syncthing#9087

Merged

Android API level 30 breaks interface address discovery syncthing/syncthing-android#1628

Closed

romanovj mentioned this pull request Sep 18, 2023

Serve DLNA doesn't work on Android rclone/rclone#7316

Open

wlynxg mentioned this pull request Oct 8, 2023

fix: get network card interface in Android 11 environment #61088

Closed

fix: package reference causes compilation failure

bff8d40

itpan8067 mentioned this pull request Jan 4, 2024

Permission issue with PION WebRTC under GOMOBILE Android >= 11 (SDK 30) - EDIT: SOLVED BY https://github.com/golang/go/pull/61089 pion/webrtc#2640

Open

neonphog mentioned this pull request Apr 1, 2024

Error: failed to create network: route ip+net: netlinkrib: permission denied goroutine 21 on SDK 33 and Android 14 holochain/tx5#87

Open

siddarthkay mentioned this pull request Apr 12, 2024

store nodes are not available after upgrading golang to 1.20 status-im/status-mobile#19581

Closed

wlynxg mentioned this pull request Jun 20, 2024

About ipv6 address listen vikulin/gomobile#3

Closed

gabyhelp mentioned this pull request Jun 20, 2024

x/mobile: Calling net.Listen fails on Android 11+ #68082

Open

x/mobile: fix net.Interface() and net.InterfaceAddrs() in Android11 version #61089

Are you sure you want to change the base?

x/mobile: fix net.Interface() and net.InterfaceAddrs() in Android11 version #61089

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