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22 * @file dht/gnunet-service-dht.c
23 * @brief GNUnet DHT service
24 * @author Christian Grothoff
25 * @author Nathan Evans
28 #include "gnunet_block_lib.h"
29 #include "gnunet_util_lib.h"
30 #include "gnunet_transport_service.h"
31 #include "gnunet_hello_lib.h"
32 #include "gnunet_dht_service.h"
33 #include "gnunet_statistics_service.h"
34 #include "gnunet-service-dht.h"
35 #include "gnunet-service-dht_clients.h"
36 #include "gnunet-service-dht_datacache.h"
37 #include "gnunet-service-dht_hello.h"
38 #include "gnunet-service-dht_neighbours.h"
39 #include "gnunet-service-dht_nse.h"
40 #include "gnunet-service-dht_routing.h"
45 * Handle for the statistics service.
47 struct GNUNET_STATISTICS_Handle *GDS_stats;
50 * Our handle to the BLOCK library.
52 struct GNUNET_BLOCK_Context *GDS_block_context;
55 * The configuration the DHT service is running with
57 const struct GNUNET_CONFIGURATION_Handle *GDS_cfg;
60 * Handle to our server.
62 struct GNUNET_SERVER_Handle *GDS_server;
67 struct GNUNET_MessageHeader *GDS_my_hello;
70 * Handle to the transport service, for getting our hello
72 struct GNUNET_TRANSPORT_Handle *GDS_transport_handle;
75 * Handle to get our current HELLO.
77 static struct GNUNET_TRANSPORT_GetHelloHandle *ghh;
80 * Hello address expiration
82 struct GNUNET_TIME_Relative hello_expiration;
86 * Receive the HELLO from transport service, free current and replace
90 * @param message HELLO message of peer
93 process_hello (void *cls, const struct GNUNET_MessageHeader *message)
95 GNUNET_assert (message != NULL);
96 GNUNET_free_non_null (GDS_my_hello);
97 GDS_my_hello = GNUNET_malloc (ntohs (message->size));
98 memcpy (GDS_my_hello, message, ntohs (message->size));
103 * Task run during shutdown.
108 shutdown_task (void *cls)
112 GNUNET_TRANSPORT_get_hello_cancel (ghh);
115 if (GDS_transport_handle != NULL)
117 GNUNET_TRANSPORT_disconnect (GDS_transport_handle);
118 GDS_transport_handle = NULL;
120 GDS_NEIGHBOURS_done ();
121 GDS_DATACACHE_done ();
125 if (GDS_block_context != NULL)
127 GNUNET_BLOCK_context_destroy (GDS_block_context);
128 GDS_block_context = NULL;
130 if (GDS_stats != NULL)
132 GNUNET_STATISTICS_destroy (GDS_stats, GNUNET_YES);
135 GNUNET_free_non_null (GDS_my_hello);
141 * Process dht requests.
144 * @param server the initialized server
145 * @param c configuration to use
149 struct GNUNET_SERVER_Handle *server,
150 const struct GNUNET_CONFIGURATION_Handle *c)
154 GNUNET_SERVER_suspend (server);
156 GNUNET_CONFIGURATION_get_value_time (c, "transport", "HELLO_EXPIRATION", &hello_expiration))
158 hello_expiration = GNUNET_CONSTANTS_HELLO_ADDRESS_EXPIRATION;
160 GDS_block_context = GNUNET_BLOCK_context_create (GDS_cfg);
161 GDS_stats = GNUNET_STATISTICS_create ("dht", GDS_cfg);
164 GDS_DATACACHE_init ();
166 if (GNUNET_OK != GDS_NEIGHBOURS_init ())
168 shutdown_task (NULL);
171 GNUNET_SCHEDULER_add_shutdown (&shutdown_task,
173 GDS_transport_handle =
174 GNUNET_TRANSPORT_connect (GDS_cfg, NULL, NULL, NULL, NULL, NULL);
175 if (GDS_transport_handle == NULL)
177 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
178 _("Failed to connect to transport service!\n"));
181 ghh = GNUNET_TRANSPORT_get_hello (GDS_transport_handle, &process_hello, NULL);
186 * The main function for the dht service.
188 * @param argc number of arguments from the command line
189 * @param argv command line arguments
190 * @return 0 ok, 1 on error
193 main (int argc, char *const *argv)
199 GNUNET_SERVICE_run (argc, argv, "dht", GNUNET_SERVICE_OPTION_NONE, &run,
205 /* end of gnunet-service-dht.c */