Are they integrating LwIP as it is or are they hacking its source to fit into your architecture? I did the latter a decade ago for a home-grown SoC and it is n

Are they integrating LwIP as it is or are they hacking its source to fit into your architecture? I did the latter a decade ago for a home-grown SoC and it is non-trivial. And then testing it with conformance/performance in mind takes more time.