= TCP/IP 소켓 관련 시스템콜 = struct sockaddr_in { short int sin_family; /* Address family */ unsigned short int sin_port; /* Port number */ struct in_addr sin_addr; /* Internet address */ unsigned char sin_zero[8]; /* Same size as struct sockaddr */ }; -> 실제로 사용하게 되는 구조체. 꼭 기억하자! // htons()--"Host to Network Short" // htonl()--"Host to Network Long" // ntohs()--"Network to Host Short" // ntohl()--"Netw..