Fix for Tracert for .NET MAUI Android finally done in .NET 7.0.3

[norton287]

They have finally put in a fix in .NET 7.0.3 for .NET MAUI Android for Ping that allows Tracert functionality on all devices.

You just have to modify the payload to be just this instead of the usual:

Array.Empty<byte>

Reference my Github issue here on the resolution: Issue

Could you allow this in your utility for Android then I could reimplement Tracert in my app again! This is good news!

But it still does not function on the emulator, only on real devices :(

John

[hekkaaa]

Hello @norton287 .
I'll see what i can do. I do not promise that it will be promptly resolved, because. I'm currently busy with another project.

[norton287]

Thank you! John On February 17, 2023 1:58:48 AM Alexander Pototsky ***@***.***> wrote: Hello @norton287<https://github.com/norton287> . I'll see what i can do. I do not promise that it will be promptly resolved, because. I'm currently busy with another project. — Reply to this email directly, view it on GitHub<#41 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/AKBF5PC6JDQ7JP3TRHTYY43WX4VTFANCNFSM6AAAAAAU6TKBAM>. You are receiving this because you were mentioned.Message ID: ***@***.***>

[hekkaaa]

Hi @norton287 .
I read the bugfix from the developers several times and didn't quite understand what needs to be changed in the code.
For my part , I decided to test the code on MAUI .NET 7.
Everything works fine on the Windows platform as before, but I have problems on the Android emulator.

The error is as follows:
System.Exception: 'Unexpected error Unable to send custom ping payload. Run program under privileged user account or grant cap_net_raw capability using setcap(8).'

red line screen - launched under the account "Administrator".

Unfortunately I have no way to test on a real android device.
So far I have no ideas how to check the work of the code differently and to debug the code, and to do debugging.

[norton287]

@hekkaaa Just set the payload to this:

Array.Empty<byte>

That should take care of the error but the emulators were stripped of the ability to do a ping -t so they will fail on a tracert. Normal ping will work though.

[norton287]

@hekkaaa This is my workaround for now with Array payload as an example:

for (var i = 1; i <= 30; i++) { var reply = await new Ping().SendPingAsync(hostname, 5000, Array.Empty<byte>(), new PingOptions(i, true)); Debug.WriteLine($"Hop {i} IP: {reply.Address}"); InterHopsList.Add(new IHops() { Address = reply.Address }); if (reply.Status == IPStatus.Success) { // Stop tracing if ping is successful break; } }

Edit: It did not paste right for some reason

[hekkaaa]

@norton287
I added the recommended code to the test class TracerouteAndroidAsync. I hope I did everything right.
Can you add a test branch to your project and check if it helped?
test-android-fix
Or should I make a test release in nuget?

[norton287]

@hekkaaa can you make a test nuget, it will be cleaner for me. I will install it and add the method to enable the tracert function and test it pretty fast.

[hekkaaa]

Hello @norton287.
I have a request for you. The current version of the library has advanced options for filling in arguments.
Can I ask you to run the following code in your application and see the result?
You may not have to make a separate class for Android.
There are also asynchronous methods in my library. You can use them if it's more convenient for you.

string hostname = "google.com";

Traceroute testTrac = new Traceroute();
IEnumerable<string> result = testTrac.GetIpTraceRoute(hostname, 4000, Array.Empty<byte>(), true, 1, 31);


IcmpRequestSender icmpRequestSender = new IcmpRequestSender();
PingReply res2 = icmpRequestSender.RequestIcmp(hostname, 4000, Array.Empty<byte>(), new PingOptions(2, true));

[norton287]

@hekkaaa Excellent!! Both async and sync methods work great on Android! Again you have crafted a very wonderful and useful library that is essential in my toolkit!

[hekkaaa]

@norton287
I sometimes wonder at myself =)
So I understand that the issue has been resolved and we can close the task?

The manual for the tool can be found in my wiki.
I have described most of the methods of working with the library.
https://github.com/hekkaaa/NetObserver/wiki/Code-Manual-EN#public-ienumerablestring-getiptraceroutestring-hostname

[norton287]

@hekkaaa Yes the task is complete and you have done an amazing job! Again, thank you for your work.

[hekkaaa]

Done