Issue with Tun-mode Starting in Versions After 6.55

[Phleesty]

Hello, I’d like to start by mentioning that I read as much as I could in the general thread on issues with version 6.31+ (#4539), but I found parts of it difficult to understand since much of it is in Chinese.

Could you explain why Tun-mode has started to have issues with enabling in versions after 6.55? (windows) I frequently see messages like this:

+0300 2024-11-13 20:25:43 WARN inbound/tun[tun-in]: open tun interface take too much time to finish!
FATAL[0015] start service: initialize inbound/tun[tun-in]: configure tun interface: Cannot create a file when that file already exists.

For now, my solution has been to revert to version 6.55, since I need to frequently switch between Tun-mode and system proxy mode. However, I would like to know if it’s possible to rebuild the program with new features, such as regional presets, while maintaining stable Tun-mode switching.

Were there significant changes in the code specifically affecting the enable/disable mechanism for Tun-mode, and how difficult would it be to fix this issue?

It seems that this code in MainWindowViewModel.cs (version 7.0.9) should be responsible for this, but something is clearly off, and you probably commented it out for a reason:

        private async Task LoadCore()
        {
            //if (_config.tunModeItem.enableTun)
            //{
            //    Task.Delay(1000).Wait();
            //    WindowsUtils.RemoveTunDevice();
            //}
            await Task.Run(async () =>
            {
                var node = await ConfigHandler.GetDefaultServer(_config);
                await CoreHandler.Instance.LoadCore(node);
            });
        }