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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;
- /**
- * Hello address expiration
- */
- struct GNUNET_TIME_Relative hello_expiration;
- /**
- * 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;
- if (GNUNET_OK !=
- GNUNET_CONFIGURATION_get_value_time (c, "transport", "HELLO_EXPIRATION", &hello_expiration))
- {
- hello_expiration = GNUNET_CONSTANTS_HELLO_ADDRESS_EXPIRATION;
- }
- 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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