My question is in regards to this question: https://askubuntu.com/questions/540665/packet-traversal-through-ubuntu-kernel
This is a question about the nitty-gritty underpinnings of the linux kernel. While, technically, related to Ubuntu it's not really Ubuntu-specific. this question on meta leads me to think the proper place is not here but on unix.se instead.
linux-kerneltags for Unix & Linux and Stack Overflow. AU isn't anywhere near the top set of results.