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/*
     This file is part of GNUnet.
     Copyright (C) 2009, 2010, 2011 GNUnet e.V.

     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., 51 Franklin Street, Fifth Floor,
     Boston, MA 02110-1301, USA.
*/

/**
 * @file dht/gnunet-service-xdht.c
 * @brief GNUnet DHT service
 * @author Christian Grothoff
 * @author Nathan Evans
 */

#include "platform.h"
#include "gnunet_block_lib.h"
#include "gnunet_util_lib.h"
#include "gnunet_transport_service.h"
#include "gnunet_hello_lib.h"
#include "gnunet_dht_service.h"
#include "gnunet_statistics_service.h"
#include "gnunet-service-xdht.h"
#include "gnunet-service-xdht_clients.h"
#include "gnunet-service-xdht_datacache.h"
#include "gnunet-service-xdht_neighbours.h"
#include "gnunet-service-xdht_nse.h"
#include "gnunet-service-xdht_routing.h"



/**
 * Handle for the statistics service.
 */
struct GNUNET_STATISTICS_Handle *GDS_stats;

/**
 * Our handle to the BLOCK library.
 */
struct GNUNET_BLOCK_Context *GDS_block_context;

/**
 * The configuration the DHT service is running with
 */
const struct GNUNET_CONFIGURATION_Handle *GDS_cfg;

/**
 * Should we store our topology predecessor and successor IDs into statistics?
 */
extern unsigned int track_topology;

#if ENABLE_MALICIOUS
/**
 * Should this peer act malicious?
 */
unsigned int malicious;
#endif


/**
 * Task run during shutdown.
 *
 * @param cls unused
 */
static void
shutdown_task (void *cls)
{
  GDS_NEIGHBOURS_done ();
  GDS_DATACACHE_done ();
  GDS_ROUTING_done ();
  GDS_NSE_done ();
  if (GDS_block_context != NULL)
  {
    GNUNET_BLOCK_context_destroy (GDS_block_context);
    GDS_block_context = NULL;
  }
  if (GDS_stats != NULL)
  {
    GNUNET_STATISTICS_destroy (GDS_stats, GNUNET_YES);
    GDS_stats = NULL;
  }
}


/**
 * Process dht requests.
 *
 * @param cls closure
 * @param server the initialized server
 * @param c configuration to use
 */
static void
run (void *cls, struct GNUNET_SERVER_Handle *server,
     const struct GNUNET_CONFIGURATION_Handle *c)
{
  unsigned long long _track_topology;

  GDS_cfg = c;
  GDS_block_context = GNUNET_BLOCK_context_create (GDS_cfg);
  GDS_stats = GNUNET_STATISTICS_create ("dht", GDS_cfg);
  GDS_ROUTING_init ();
  GDS_NSE_init ();
  GDS_DATACACHE_init ();
  GDS_CLIENTS_init (server);
  if (GNUNET_OK ==
      GNUNET_CONFIGURATION_get_value_number (c, "xdht", "track_toplogy",
                                             &_track_topology))
  {
    track_topology = (unsigned int) _track_topology;
  }
  if (GNUNET_OK != GDS_NEIGHBOURS_init ())
  {
    shutdown_task (NULL);
    return;
  }
  GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
                                &shutdown_task,
                                NULL);
}


/**
 * The main function for the dht service.
 *
 * @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)
{
  int ret;

  ret =
      (GNUNET_OK ==
       GNUNET_SERVICE_run (argc, argv,
                           "xdht",
                           GNUNET_SERVICE_OPTION_NONE, &run,
                           NULL)) ? 0 : 1;
  GDS_CLIENTS_done ();
  return ret;
}

/* end of gnunet-service-xdht.c */