As far as I know, there are already apps that implement this function on the App Store. The specific function is that the mobile phone turns on the personal hotspot and turns on the VPN (tunnel provider) and opens an HTTP server (6.6.6.6:8090) in the process where the tunnel provider is located, and then uses "NINTENDO SWITCH" (game host) to connect to the hotspot of the mobile phone and Set up a proxy server (6.6.6.6:8090) to achieve acceleration.

hello , What I am doing is similar to yours, I want to ask you a question. I created a tunnel “utun1” on the A device (the local ipv4 ip address of the tunnel “utun1” is 6.6.6.6) and then created a socket in the packettunnel process (socket binding 6.6.6.6:8088) and called the accept() function, then the A device Turn on the personal hotspot (hotspot name iPhone Wi-Fi), and then connect the B device to Wi-Fi (iPhone Wi-Fi). Create a socket on device B and try connet (6.6.6.6:8088), my question is why the socket of device B cannot connect to 6.6.6.6:8088。

hello ，I have encountered the same problem as you. Have you solved it?