int getnameinfo(const struct sockaddr *sa, size_t salen, char *host, size_t hostlen, char *serv, size_t servlen, int flags)
getnameinfo() is a function that returns translated string from 32bit(ipv4)/128bit(ipv6) IP address...
int getaddrinfo(const char *nodename, const char *servname, const struct addrinfo *hints, struct addrinfo **res)
getaddrinfo() is a function that returns information on a particular host name (such as its IP addres...