RawDatagramSocket stopped working on iOS 17.4.1 about sdk

[an-mediola]

Restarting the iPhone fixed it!
For now it isn't reproducible.

[indeedshaw]

Have you found the cause of the problem? I can reproducible this issue.

[an-mediola]

Have you found the cause of the problem? I can reproducible this issue.

unfortunately no, it seems related to OS not dart. restarting the phone didn't help?

[indeedshaw]

Yes, restarting the phone socket to send data will return to normal (socket.send returns > 0), but I want to know what causes this so that we can prevent it from happening

[an-mediola]

Yes, restarting the phone socket to send data will return to normal (socket.send returns > 0), but I want to know what causes this so that we can prevent it from happening

Then if you know or you can find a reliable way to reproduce it, you can write it here for others and then we will reopen it.
I couldn't reproduce it after restarting the phone and then is not possible for others to investigate the reason.
Maybe somebody from core team can help us.

[indeedshaw]

You can try to see if this step can reproduce this problem.Here's my repeat step: iOS17.5.1, denies the local network permission that the software initially requested, then turns it back on in Settings, and no matter how I try to send a broadcast, the length of the broadcast is 0, and the socket only receives a close event, no error occurred.
At the moment I think the software was initially not granted local network permissions, subsequent permissions were granted to no avail, and a reboot was needed to achieve some kind of reset. But I am not sure if this is the reason, I may need to ask the relevant Apple engineers. I'm planning to do that.