1struct sockaddr_in { int sin_addr; }; 2static void ConvertAddr (struct sockaddr_in *saddr, void **addr) 3{ 4 *addr = (void *) &saddr->sin_addr; 5} 6unsigned char EnableLocalHost (struct sockaddr_in *ifa_addr) 7{ 8 unsigned char * addr; 9 ConvertAddr(ifa_addr, (void **)&addr); 10 return addr[0]; 11} 12