- fixed small bugs, added FIXME, added monitor client (to be tested)

1 files changed, 256 insertions, 0 deletions

diff --git a/src/dht/gnunet-dht-monitor.c b/src/dht/gnunet-dht-monitor.c
new file mode 100644
index 000000000..ab2e1a240
--- /dev/null
+++ b/src/dht/gnunet-dht-monitor.c
@@ -0,0 +1,256 @@
+/*
+     This file is part of GNUnet.
+     (C) 2012 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 3, 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-monitor.c
+ * @brief search for data in DHT
+ * @author Christian Grothoff
+ * @author Bartlomiej Polot
+ */
+#include "platform.h"
+#include "gnunet_dht_service.h"
+
+/**
+ * The type of the query
+ */
+static unsigned int block_type;
+
+/**
+ * The key to be monitored
+ */
+static char *query_key;
+
+/**
+ * User supplied timeout value (in seconds)
+ */
+static unsigned long long timeout_request = 5;
+
+/**
+ * Be verbose
+ */
+static int verbose;
+
+/**
+* Handle to the DHT
+ */
+static struct GNUNET_DHT_Handle *dht_handle;
+
+/**
+ * Global handle of the configuration
+ */
+static const struct GNUNET_CONFIGURATION_Handle *cfg;
+
+/**
+ * Handle for the get request
+ */
+static struct GNUNET_DHT_MonitorHandle *monitor_handle;
+
+/**
+ * Count of messages received
+ */
+static unsigned int result_count;
+
+/**
+ * Global status value
+ */
+static int ret;
+
+
+/**
+ * Function called on shutdown, disconnects from DHT if necessary.
+ *
+ * @param cls closure (unused)
+ * @param tc Task Context
+ */
+static void
+shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+  if (verbose)
+    FPRINTF (stderr, "%s",  "Shutting down!\n");
+  if (dht_handle != NULL)
+  {
+    GNUNET_DHT_disconnect (dht_handle);
+    dht_handle = NULL;
+  }
+}
+
+
+/**
+ * Stop monitoring request and start shutdown
+ *
+ * @param cls closure (unused)
+ * @param tc Task Context
+ */
+static void
+cleanup_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+  if (verbose)
+    FPRINTF (stderr, "%s",  "Cleaning up!\n");
+  if (monitor_handle != NULL)
+  {
+    GNUNET_DHT_monitor_stop (monitor_handle);
+    monitor_handle = NULL;
+  }
+  GNUNET_SCHEDULER_add_now (&shutdown_task, NULL);
+}
+
+
+/**
+ * Callback called on each request going through the DHT.
+ *
+ * @param cls Closure.
+ * @param mtype Type of the DHT message monitored.
+ * @param exp When will this value expire.
+ * @param key Key of the result/request.
+ * @param get_path Peers on reply path (or NULL if not recorded).
+ * @param get_path_length number of entries in get_path.
+ * @param put_path peers on the PUT path (or NULL if not recorded).
+ * @param put_path_length number of entries in get_path.
+ * @param desired_replication_level Desired replication level.
+ * @param type Type of the result/request.
+ * @param data Pointer to the result data.
+ * @param size Number of bytes in data.
+ */
+void
+monitor_callback (void *cls,
+                  uint16_t mtype,
+                  struct GNUNET_TIME_Absolute exp,
+                  const GNUNET_HashCode * key,
+                  const struct GNUNET_PeerIdentity *get_path,
+                  unsigned int get_path_length,
+                  const struct GNUNET_PeerIdentity *put_path,
+                  unsigned int put_path_length,
+                  uint32_t desired_replication_level,
+                  enum GNUNET_DHT_RouteOption options,
+                  enum GNUNET_BLOCK_Type type,
+                  const void *data,
+                  size_t size)
+{
+  FPRINTF (stdout, "Result %d, type %d:\n%.*s\n",
+           result_count,
+           type,
+           (unsigned int) size,
+           (char *) data);
+  result_count++;
+}
+
+
+/**
+ * Main function that will be run by the scheduler.
+ *
+ * @param cls closure
+ * @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, char *const *args, const char *cfgfile,
+     const struct GNUNET_CONFIGURATION_Handle *c)
+{
+  struct GNUNET_TIME_Relative timeout;
+  GNUNET_HashCode *key;
+
+  cfg = c;
+
+  dht_handle = GNUNET_DHT_connect (cfg, 1);
+
+  if (dht_handle == NULL)
+  {
+    if (verbose)
+      FPRINTF (stderr, "%s",  "Couldn't connect to DHT service!\n");
+    ret = 1;
+    return;
+  }
+  else if (verbose)
+    FPRINTF (stderr, "%s",  "Connected to DHT service!\n");
+
+  if (block_type == GNUNET_BLOCK_TYPE_ANY)      /* Type of data not set */
+    block_type = GNUNET_BLOCK_TYPE_TEST;
+
+  if (query_key != NULL) {
+    key = GNUNET_malloc (sizeof(GNUNET_HashCode));
+    GNUNET_CRYPTO_hash (query_key, strlen (query_key), key);
+  }
+  else
+    key = NULL;
+
+  if (0 != timeout_request)
+  {
+    timeout = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS,
+                                             timeout_request);
+    if (verbose)
+      FPRINTF (stderr, "Monitoring for %llus\n", timeout_request);
+  }
+  else
+  {
+    timeout = GNUNET_TIME_UNIT_FOREVER_REL;
+    if (verbose)
+      FPRINTF (stderr, "Monitoring indefinitely (close with Ctrl+C)\n");
+  }
+
+  GNUNET_SCHEDULER_add_delayed (timeout, &cleanup_task, NULL);
+  if (verbose)
+    FPRINTF (stderr, "Issuing MONITOR request for %s!\n", query_key);
+  monitor_handle = GNUNET_DHT_monitor_start (dht_handle, block_type, key,
+                                             &monitor_callback, NULL);
+  if (verbose)
+    FPRINTF (stderr, "MONITOR started!\n");
+  GNUNET_free_non_null (key);
+
+}
+
+
+/**
+ * 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', "type", "TYPE",
+   gettext_noop ("the type of data to look for"),
+   1, &GNUNET_GETOPT_set_uint, &block_type},
+  {'T', "timeout", "TIMEOUT",
+   gettext_noop ("how long to execute? 0 = forever"),
+   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-monitor
+ *
+ * @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
+                              ("Prints all packets that go through the DHT."),
+                              options, &run, NULL)) ? ret : 1;
+}
+
+/* end of gnunet-dht-monitor.c */