- Variable has incomplete type 'struct sockaddr_in'
- struct sockaddr_in sin;
- Variable has incomplete type 'struct sockaddr_in'
- Forward declaration of 'struct sockaddr_in'
- #import <sys/socket.h>
- #import <netinet/in.h>
- #import <netinet6/in6.h>
- #import <arpa/inet.h>
- #import <ifaddrs.h>
- #include <netdb.h>
- #import <SystemConfiguration/SCNetworkReachability.h>