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/* Based on a test case by grd@algonet.se. */
#include <netdb.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/param.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
int
main (void)
{
struct hostent *ent;
struct in_addr hostaddr;
int result = 0;
inet_aton ("127.0.0.1", (struct in_addr *) &hostaddr.s_addr);
ent = gethostbyaddr (&hostaddr, sizeof (hostaddr), AF_INET);
if (ent == NULL)
puts ("gethostbyaddr (...) == NULL");
else
{
puts ("Using gethostbyaddr(..):");
printf ("h_name: %s\n", ent->h_name);
if (ent->h_aliases == NULL)
puts ("ent->h_aliases == NULL");
else
printf ("h_aliases[0]: %s\n", ent->h_aliases[0]);
}
ent = gethostbyname ("127.0.0.1");
if (ent == NULL)
{
puts ("gethostbyname (\"127.0.0.1\") == NULL");
result = 1;
}
else
{
printf ("\nNow using gethostbyname(..):\n");
printf ("h_name: %s\n", ent->h_name);
if (strcmp (ent->h_name, "127.0.0.1") != 0)
{
puts ("ent->h_name != \"127.0.0.1\"");
result = 1;
}
if (ent->h_aliases == NULL)
{
puts ("ent->h_aliases == NULL");
result = 1;
}
else
{
printf ("h_aliases[0]: %s\n", ent->h_aliases[0]);
result |= ent->h_aliases[0] != NULL;
}
}
return result;
}
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