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#include <stdio.h>
#include <netdb.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
int main(int argc, char *argv[]) {
struct hostent *he;
in_addr_t **a;
char *arg= argc > 1 ? argv[1] : "whiskey.local";
uint8_t t[256];
if (inet_pton(AF_INET, arg, &t) > 0)
he = gethostbyaddr(t, 4, AF_INET);
else if (inet_pton(AF_INET6, arg, &t) > 0)
he = gethostbyaddr(t, 16, AF_INET6);
else
he = gethostbyname(arg);
if (!he) {
fprintf(stderr, "lookup failed\n");
return 1;
}
fprintf(stderr, "official name: %s\n", he->h_name);
if (!he->h_aliases || !he->h_aliases[0])
fprintf(stderr, "no aliases\n");
else {
char **h;
fprintf(stderr, "aliases:");
for (h = he->h_aliases; *h; h++)
fprintf(stderr, " %s", *h);
fprintf(stderr, "\n");
}
fprintf(stderr, "addr type: %s\n", he->h_addrtype == AF_INET ? "inet" : (he->h_addrtype == AF_INET6 ? "inet6" : NULL));
fprintf(stderr, "addr length: %i\n", he->h_length);
fprintf(stderr, "addresses:");
for (a = (in_addr_t**) he->h_addr_list; *a; a++) {
char t[256];
fprintf(stderr, " %s", inet_ntop(he->h_addrtype, *a, t, sizeof(t)));
}
fprintf(stderr, "\n");
return 0;
}
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