Declaration of 'struct sockaddr_in' will not be visible outside of this function

Apple complier gives the warning (Declaration of 'struct sockaddr_in' will not be visible outside of this function) in reachability class file

+ (Reachability*) reachabilityWithAddress: (const struct sockaddr_in*) hostAddress;

To Resolve the issue just simply

Add #import <netinet/in.h> in Reachability.h to get away with this