#define GET_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 1)
+/**
+ * Flag for reverse lookup.
+ */
+static int reverse;
+
+
+/**
+ * Prints each hostname obtained from DNS.
+ *
+ * @param cls closure (unused)
+ * @param hostname one of the names for the host, NULL
+ * on the last call to the callback
+ */
+static void
+print_hostname (void *cls,
+ const char *hostname)
+{
+ if (NULL == hostname)
+ return;
+ FPRINTF (stdout, "%s\n", hostname);
+}
+
+
/**
* Callback function to display address.
+ *
+ * @param cls closure (unused)
+ * @param addr one of the addresses of the host, NULL for the last address
+ * @param addrlen length of the address
*/
static void
-printer (void *cls,
- const struct sockaddr * addr,
- socklen_t addrlen)
+print_sockaddr (void *cls, const struct sockaddr *addr, socklen_t addrlen)
{
- if (addr == NULL)
+ if (NULL == addr)
return;
- FPRINTF (stdout,
- "%s\n",
- GNUNET_a2s (addr, addrlen));
+ FPRINTF (stdout, "%s\n", GNUNET_a2s (addr, addrlen));
}
* @param cfg configuration
*/
static void
-run (void *cls,
- char *const *args,
- const char *cfgfile,
+run (void *cls, char *const *args, const char *cfgfile,
const struct GNUNET_CONFIGURATION_Handle *cfg)
{
+ const struct sockaddr *sa;
+ socklen_t salen;
+ struct sockaddr_in v4;
+ struct sockaddr_in6 v6;
+
if (args[0] == NULL)
return;
- GNUNET_RESOLVER_ip_get (cfg,
- args[0],
- AF_UNSPEC,
- GET_TIMEOUT,
- &printer,
- NULL);
+ if (! reverse)
+ {
+ GNUNET_RESOLVER_ip_get (args[0], AF_UNSPEC, GET_TIMEOUT, &print_sockaddr, NULL);
+ return;
+ }
+
+ sa = NULL;
+ memset (&v4, 0, sizeof (v4));
+ v4.sin_family = AF_INET;
+#if HAVE_SOCKADDR_IN_SIN_LEN
+ v4.sin_len = sizeof (v4);
+#endif
+ if (1 == inet_pton (AF_INET,
+ args[0],
+ &v4.sin_addr))
+ {
+ sa = (struct sockaddr *) &v4;
+ salen = sizeof (v4);
+ }
+ memset (&v6, 0, sizeof (v6));
+ v6.sin6_family = AF_INET6;
+#if HAVE_SOCKADDR_IN_SIN_LEN
+ v6.sin6_len = sizeof (v6);
+#endif
+ if (1 == inet_pton (AF_INET6,
+ args[0],
+ &v6.sin6_addr))
+ {
+ sa = (struct sockaddr *) &v6;
+ salen = sizeof (v6);
+ }
+ if (NULL == sa)
+ {
+ fprintf (stderr,
+ "`%s' is not a valid IP: %s\n",
+ args[0],
+ strerror (errno));
+ return;
+ }
+ GNUNET_RESOLVER_hostname_get (sa, salen,
+ GNUNET_YES,
+ GET_TIMEOUT,
+ &print_hostname,
+ NULL);
}
/**
main (int argc, char *const *argv)
{
static const struct GNUNET_GETOPT_CommandLineOption options[] = {
+ { 'r', "reverse", NULL,
+ gettext_noop ("perform a reverse lookup"),
+ 0, &GNUNET_GETOPT_set_one, &reverse },
GNUNET_GETOPT_OPTION_END
};
return (GNUNET_OK ==
- GNUNET_PROGRAM_run (argc,
- argv,
- "gnunet-resolver [hostname]",
- gettext_noop
- ("Test GNUnet DNS resolver code."),
+ GNUNET_PROGRAM_run (argc, argv, "gnunet-resolver [hostname]",
+ gettext_noop ("Use build-in GNUnet stub resolver"),
options, &run, NULL)) ? 0 : 1;
}