Upgrade to latest lwip release (IDFGH-11237)

[AxelLin]

FYI,
lwIP 2.2.0 released
https://lists.nongnu.org/archive/html/lwip-devel/2023-09/msg00009.html

I think esp-lwip should update to latest lwip release.

BTW, there are some bugfix in upstream but not in esp-lwip,
maybe someone should check upstream fixes.
e.g. http://git.savannah.gnu.org/cgit/lwip.git/commit/?id=574bd6e5aa57b971db7b347b8ad761342be9a02c

[AxelLin]

No progress in the past 6 Months?

[david-cermak]

I'm sorry it took so long, but it's already in progress from the last week.
I'll be again posting the status update of Espressif patches on top of this branch in this repo's Wiki, so you can watch our progress in https://github.com/espressif/esp-lwip/wiki/Espressif-patches-in-2.2.0-esp-on-top-of-2.2.0-rel

about the commit you mentioned, I'm not confident enough to pick it to stable branches (we'd have a similar fix in 9e62aff fixing a different scenario, but there might be a relation?)

[david-cermak]

I'm sorry, forgot to close this issue. Branch 2.2.0-esp was deployed in Oct-2024 as https://github.com/espressif/esp-lwip/commits/2.2.0-esp/ and used in IDF v5.4 and IDF v5.5.