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/*
This file is part of GNUnet.
(C) 2009, 2010, 2011 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-service-dht.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-dht.h"
#include "gnunet-service-dht_clients.h"
#include "gnunet-service-dht_datacache.h"
#include "gnunet-service-dht_hello.h"
#include "gnunet-service-dht_neighbours.h"
#include "gnunet-service-dht_nse.h"
#include "gnunet-service-dht_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;
/**
* Our HELLO
*/
struct GNUNET_MessageHeader *GDS_my_hello;
/**
* Handle to the transport service, for getting our hello
*/
struct GNUNET_TRANSPORT_Handle *GDS_transport_handle;
/**
* Handle to get our current HELLO.
*/
static struct GNUNET_TRANSPORT_GetHelloHandle *ghh;
/**
* Receive the HELLO from transport service, free current and replace
* if necessary.
*
* @param cls NULL
* @param message HELLO message of peer
*/
static void
process_hello (void *cls, const struct GNUNET_MessageHeader *message)
{
GNUNET_assert (message != NULL);
GNUNET_free_non_null (GDS_my_hello);
GDS_my_hello = GNUNET_malloc (ntohs (message->size));
memcpy (GDS_my_hello, message, ntohs (message->size));
}
/**
* Task run during shutdown.
*
* @param cls unused
* @param tc unused
*/
static void
shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
if (NULL != ghh)
{
GNUNET_TRANSPORT_get_hello_cancel (ghh);
ghh = NULL;
}
if (GDS_transport_handle != NULL)
{
GNUNET_TRANSPORT_disconnect (GDS_transport_handle);
GDS_transport_handle = NULL;
}
GDS_NEIGHBOURS_done ();
GDS_DATACACHE_done ();
GDS_ROUTING_done ();
GDS_HELLO_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;
}
GNUNET_free_non_null (GDS_my_hello);
GDS_my_hello = 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)
{
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_HELLO_init ();
GDS_CLIENTS_init (server);
if (GNUNET_OK != GDS_NEIGHBOURS_init ())
{
shutdown_task (NULL, NULL);
return;
}
GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
NULL);
GDS_transport_handle =
GNUNET_TRANSPORT_connect (GDS_cfg, NULL, NULL, NULL, NULL, NULL);
if (GDS_transport_handle == NULL)
{
GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
_("Failed to connect to transport service!\n"));
return;
}
ghh = GNUNET_TRANSPORT_get_hello (GDS_transport_handle, &process_hello, 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, "dht", GNUNET_SERVICE_OPTION_NONE, &run,
NULL)) ? 0 : 1;
GDS_CLIENTS_done ();
return ret;
}
/* end of gnunet-service-dht.c */
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