#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <netdb.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>

int main()
{ const char * ips = "129.171.33.6";
  struct in_addr ip;
  struct hostent * he;

  inet_aton(ips, & ip);

  unsigned char * ar = (unsigned char *) & ip;
  printf("%s encoded as %hhu.%hhu.%hhu.%hhu\n", ips, ar[0], ar[1], ar[2], ar[3]);

  he = gethostbyaddr(& ip, sizeof(ip), AF_INET);

  printf("host name for %s is %s\n", ips, he->h_name); }