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