64 lines
1.3 KiB
C
64 lines
1.3 KiB
C
/* 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;
|
|
}
|