--- /dev/null
+/*
+ This file is part of GNUnet.
+ (C) 2001, 2002, 2004, 2005, 2006, 2007, 2009 Christian Grothoff (and other contributing authors)
+
+ GNUnet is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published
+ by the Free Software Foundation; either version 2, or (at your
+ option) any later version.
+
+ GNUnet is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with GNUnet; see the file COPYING. If not, write to the
+ Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA.
+*/
+/**
+ * @file dht/gnunet-dht-get-peer.c
+ * @brief search for peers close to key using the DHT
+ * @author Christian Grothoff
+ * @author Nathan Evans
+ */
+#include "platform.h"
+#include "gnunet_dht_service.h"
+#include "gnunet_hello_lib.h"
+
+/**
+ * The key for the query
+ */
+static char *query_key;
+
+/**
+ * User supplied timeout value (in seconds)
+ */
+static unsigned long long timeout_request = 5;
+
+/**
+ * When this request should really die
+ */
+struct GNUNET_TIME_Absolute absolute_timeout;
+
+/**
+ * Be verbose
+ */
+static int verbose;
+
+/**
+ * Handle to the DHT
+ */
+static struct GNUNET_DHT_Handle *dht_handle;
+
+/**
+ * Global handle of the scheduler
+ */
+static struct GNUNET_SCHEDULER_Handle *sched;
+
+/**
+ * Global handle of the configuration
+ */
+static const struct GNUNET_CONFIGURATION_Handle *cfg;
+
+/**
+ * Handle for the request
+ */
+static struct GNUNET_DHT_FindPeerHandle *find_peer_handle;
+
+/**
+ * Count of results found
+ */
+static unsigned int result_count;
+
+/**
+ * Global status value
+ */
+static int ret;
+
+static void
+shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+
+ if (dht_handle != NULL)
+ GNUNET_DHT_disconnect (dht_handle);
+
+ dht_handle = NULL;
+}
+
+static void
+cleanup_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+ if (find_peer_handle != NULL)
+ GNUNET_DHT_find_peer_stop (find_peer_handle, &shutdown_task, NULL);
+ else
+ GNUNET_SCHEDULER_add_now (sched, &shutdown_task, NULL);
+}
+
+/**
+ * Iterator called on each result obtained from a find peer
+ * operation
+ *
+ * @param cls closure (NULL)
+ * @param peer the peer we learned about
+ * @param reply the response message, should be a HELLO
+ */
+void find_peer_processor (void *cls,
+ const struct GNUNET_PeerIdentity *peer,
+ const struct GNUNET_MessageHeader *reply)
+{
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "test_find_peer_processor called (peer `%s'), stopping find peer request!\n", GNUNET_i2s(peer));
+
+}
+
+
+/**
+ * Signature of the main function of a task.
+ *
+ * @param cls closure
+ * @param tc context information (why was this task triggered now)
+ */
+void
+message_sent_cont (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+ if (tc->reason == GNUNET_SCHEDULER_REASON_TIMEOUT)
+ {
+ if (verbose)
+ fprintf (stderr,
+ "Failed to send FIND PEER request to service, quitting.\n");
+ ret = 1;
+ GNUNET_SCHEDULER_add_now (sched, &shutdown_task, NULL);
+ }
+ else
+ {
+ if (verbose)
+ fprintf (stderr, "FIND PEER request sent, awaiting results!\n");
+ GNUNET_SCHEDULER_add_delayed (sched,
+ GNUNET_TIME_absolute_get_remaining
+ (absolute_timeout), &cleanup_task, NULL);
+ }
+}
+
+/**
+ * Main function that will be run by the scheduler.
+ *
+ * @param cls closure
+ * @param s the scheduler to use
+ * @param args remaining command-line arguments
+ * @param cfgfile name of the configuration file used (for saving, can be NULL!)
+ * @param c configuration
+ */
+static void
+run (void *cls,
+ struct GNUNET_SCHEDULER_Handle *s,
+ char *const *args,
+ const char *cfgfile, const struct GNUNET_CONFIGURATION_Handle *c)
+{
+ struct GNUNET_TIME_Relative timeout;
+ GNUNET_HashCode key;
+ sched = s;
+ cfg = c;
+
+ if (query_key == NULL)
+ {
+ if (verbose)
+ fprintf (stderr, "Must provide key for DHT GET!\n");
+ ret = 1;
+ return;
+ }
+
+ dht_handle = GNUNET_DHT_connect (sched, cfg, 1);
+
+ if (dht_handle == NULL)
+ {
+ if (verbose)
+ fprintf (stderr, "Couldn't connect to DHT service!\n");
+ ret = 1;
+ return;
+ }
+ else if (verbose)
+ fprintf (stderr, "Connected to DHT service!\n");
+
+ GNUNET_CRYPTO_hash (query_key, strlen (query_key), &key);
+
+ timeout =
+ GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, timeout_request);
+ absolute_timeout = GNUNET_TIME_relative_to_absolute (timeout);
+
+ if (verbose)
+ fprintf (stderr, "Issuing FIND PEER request for %s!\n", query_key);
+
+ find_peer_handle = GNUNET_DHT_find_peer_start (dht_handle, timeout, 0, NULL, &key,
+ &find_peer_processor, NULL, &message_sent_cont, NULL);
+
+}
+
+
+/**
+ * gnunet-dht-get command line options
+ */
+static struct GNUNET_GETOPT_CommandLineOption options[] = {
+ {'k', "key", "KEY",
+ gettext_noop ("the query key"),
+ 1, &GNUNET_GETOPT_set_string, &query_key},
+ {'T', "timeout", "TIMEOUT",
+ gettext_noop ("how long to execute this query before giving up?"),
+ 1, &GNUNET_GETOPT_set_ulong, &timeout_request},
+ {'V', "verbose", NULL,
+ gettext_noop ("be verbose (print progress information)"),
+ 0, &GNUNET_GETOPT_set_one, &verbose},
+ GNUNET_GETOPT_OPTION_END
+};
+
+
+/**
+ * Entry point for gnunet-dht-get-peer
+ *
+ * @param argc number of arguments from the command line
+ * @param argv command line arguments
+ * @return 0 ok, 1 on error
+ */
+int
+main (int argc, char *const *argv)
+{
+ return (GNUNET_OK ==
+ GNUNET_PROGRAM_run (argc,
+ argv,
+ "gnunet-dht-get",
+ gettext_noop
+ ("Issue a GET request to the GNUnet DHT, prints results."),
+ options, &run, NULL)) ? ret : 1;
+}
projects / oweals / gnunet.git / commitdiff