L2TP IPsec android. Are there examples of implementation in java?

Question

Android

I know about the open-source openVPN client, I'm interested in the implementation of l2tp ipsec. The built-in client connects successfully, but we need exactly an example of the implementation of this protocol in java. So far, the closest option is to use the aosp code itself, but I suspect that there may be problems when calling aosp code from a third-party package, and not the system package.

Answer 1

At one time, they did not find anything like this and implemented a client on openVPN (