Lua Hook on kTLS

Lunatik is a kernel-level Lua interpreter version for scripting the Linux kernel. For example, it allows users to filter packets using Lua scripts. kTLS is a new socket type provided by Linux that transparently handles the encryption and decryption of TLS messages.

ULP (Upper Layer Protocol) is a new feature merged recently in the Linux kernel which allows user-space programs to attach L7 functionalities to the in-kernel socket structure. kTLS is implemented via ULP.

The purpose of this project is to implement a kernel level Lua hook inside the kTLS infrastructure. This way we could use Lua scripts to inspect the contents of the HTTP messages transparently inside the kernel.