Hey guys. I was installing Fedora to do my network course projects on NS. The process was more painful than I thought. The most painful part is the dependencies. Now I am stuck at the if_dl.h file. I need this file to compile my wap_supplicant. I searched the internet. Although there is many places that have this file for downloading, none tells me which package (or module) this file belongs to. I need to install the module to avoid future header file missing. Anyone happens to know which package this file belongs to? And, most of my time was spent on finding dependencies, as many software did not state their dependencies. So, is there a place that I can search which file belongs to which package? (not rpm or chkpkg as the file I want to search is not on my disk)

thank you in advance