uint16_t ntohs(uint16_t);
in_addr_t inet_addr (const char *);
+in_addr_t inet_network (const char *);
char *inet_ntoa (struct in_addr);
int inet_pton (int, const char *__restrict, void *__restrict);
const char *inet_ntop (int, const void *__restrict, char *__restrict, socklen_t);