The included lwip is at version 2.0.2 and does not have support for the socket poll function. E.g. to check multiple sockets if data is ready with POLLIN. I have existing code that uses poll and our software standards are to use poll rather than select. Rewriting to code to use select is possible but not desired.
I was wondering if Xilinx plans to update to lwip 2.1.x in the near future or if there is a process that I can follow to do it myself. LWIP added poll support in 2.1.0. Currently the latest version is 2.1.2. If you search the change log for poll - https://www.nongnu.org/lwip/2_1_x/changelog.html
I can see the lwip sources are under \ps7_cortexa9_0\libsrc\lwip202_v1_2\src\ and the headers are copied up to ps7_cortexa9_0\include\lwip\ and \netif. My concern however is that there are also xilinx specific files under \netif (filenames start with x). According to the oslib_rm.pdf, "The lwip202_v1_1 is an SDK library that is built on the open source lwIP library version 2.0.2.".
So, I'm not sure I can simply drop in the newer version of lwip myself. I've also noticed the makefiles in \libsrc\lwip202_v1_2\src\ reference individual source files. I'm also unsure if updating the lwip source myself is not reccomended.
