Hello, I’ve noticed that there are some examples that include these headers, but I don’t have them in my toolchain. I need them too to start using some other libraries. I believe these headers are from the Berkeley socket API. Is there an implementation of this API for FreeRTOS? where could I get it? Thank you very much in advance.

There are a few demos that use sockets.  You can start with the link below, which runs under the FreeRTOS Windows simulator:
http://interactive.freertos.org/entries/20290712-freertos-win32-project-with-lwip-web-server Regards.