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6 under the terms of the GNU Affero General Public License as published
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11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Affero General Public License for more details.
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20 * @file hostlist/gnunet-daemon-hostlist.c
21 * @brief code for bootstrapping via hostlist servers
22 * @author Christian Grothoff
25 #include "gnunet-daemon-hostlist_client.h"
26 #include "gnunet_core_service.h"
27 #include "gnunet_util_lib.h"
28 #include "gnunet_protocols.h"
29 #include "gnunet_statistics_service.h"
33 #include "gnunet-daemon-hostlist_server.h"
36 * Set if we are allowed to advertise our hostlist to others.
38 static int advertising;
41 * Set if the user wants us to run a hostlist server.
43 static int provide_hostlist;
46 * Handle to hostlist server's connect handler
48 static GNUNET_CORE_ConnectEventHandler server_ch;
53 * Set if we are allowed to learn about peers by accessing
56 static int bootstrapping;
59 * Set if the user allows us to learn about new hostlists
67 static struct GNUNET_STATISTICS_Handle *stats;
70 * Handle to the core service (NULL until we've connected to it).
72 static struct GNUNET_CORE_Handle *core;
75 * Handle to the hostlist client's advertisement handler
77 static GNUNET_HOSTLIST_UriHandler client_adv_handler;
80 * Handle to hostlist client's connect handler
82 static GNUNET_CORE_ConnectEventHandler client_ch;
85 * Handle to hostlist client's disconnect handler
87 static GNUNET_CORE_DisconnectEventHandler client_dh;
89 GNUNET_NETWORK_STRUCT_BEGIN
92 * A HOSTLIST_ADV message is used to exchange information about
93 * hostlist advertisements. This struct is always
94 * followed by the actual url under which the hostlist can be obtained:
96 * 1) transport-name (0-terminated)
97 * 2) address-length (uint32_t, network byte order; possibly
99 * 3) address expiration (GNUNET_TIME_AbsoluteNBO); possibly
101 * 4) address (address-length bytes; possibly unaligned!)
103 struct GNUNET_HOSTLIST_ADV_Message
106 * Type will be GNUNET_MESSAGE_TYPE_HOSTLIST_ADVERTISEMENT.
108 struct GNUNET_MessageHeader header;
111 * Always zero (for alignment).
113 uint32_t reserved GNUNET_PACKED;
115 GNUNET_NETWORK_STRUCT_END
119 * Our own peer identity.
121 static struct GNUNET_PeerIdentity me;
125 * Callback invoked once our connection to CORE service is up.
128 * @param my_identity our peer's identity
131 core_init (void *cls,
132 const struct GNUNET_PeerIdentity *my_identity)
139 * Core handler for p2p hostlist advertisements
142 * @param message advertisement message we got
143 * @return #GNUNET_OK if message is well-formed
146 check_advertisement (void *cls,
147 const struct GNUNET_MessageHeader *message)
153 size = ntohs (message->size);
154 if (size <= sizeof (struct GNUNET_MessageHeader))
157 return GNUNET_SYSERR;
159 uri = (const char *) &message[1];
160 uri_size = size - sizeof (struct GNUNET_MessageHeader);
161 if (uri[uri_size - 1] != '\0')
164 return GNUNET_SYSERR;
171 * Core handler for p2p hostlist advertisements
174 * @param message advertisement message we got
175 * @return #GNUNET_OK on success
178 handle_advertisement (void *cls,
179 const struct GNUNET_MessageHeader *message)
181 const char *uri = (const char *) &message[1];
183 GNUNET_assert (NULL != client_adv_handler);
184 (void) (*client_adv_handler) (uri);
189 * Method called whenever a given peer connects. Wrapper to call both
190 * client's and server's functions
193 * @param peer peer identity this notification is about
194 * @param mq queue for sending messages to @a peer
198 connect_handler (void *cls,
199 const struct GNUNET_PeerIdentity *peer,
200 struct GNUNET_MQ_Handle *mq)
202 if (0 == memcmp (&me,
204 sizeof (struct GNUNET_PeerIdentity)))
206 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
207 "A new peer connected, notifying client and server\n");
208 if (NULL != client_ch)
209 GNUNET_assert (NULL ==
214 if (NULL != server_ch)
215 GNUNET_assert (NULL ==
220 return (void *) peer;
225 * Method called whenever a given peer disconnects. Wrapper to call
226 * both client's and server's functions
229 * @param peer peer identity this notification is about
232 disconnect_handler (void *cls,
233 const struct GNUNET_PeerIdentity *peer,
236 if (0 == memcmp (&me,
238 sizeof (struct GNUNET_PeerIdentity)))
240 /* call hostlist client disconnect handler */
241 if (NULL != client_dh)
249 * Last task run during shutdown. Disconnects us from
250 * the other services.
255 cleaning_task (void *cls)
257 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
258 "Hostlist daemon is shutting down\n");
261 GNUNET_CORE_disconnect (core);
266 GNUNET_HOSTLIST_client_stop ();
269 if (provide_hostlist)
271 GNUNET_HOSTLIST_server_stop ();
276 GNUNET_STATISTICS_destroy (stats,
284 * Main function that will be run.
287 * @param args remaining command-line arguments
288 * @param cfgfile name of the configuration file used (for saving, can be NULL!)
289 * @param cfg configuration
295 const struct GNUNET_CONFIGURATION_Handle *cfg)
297 struct GNUNET_MQ_MessageHandler learn_handlers[] = {
298 GNUNET_MQ_hd_var_size (advertisement,
299 GNUNET_MESSAGE_TYPE_HOSTLIST_ADVERTISEMENT,
300 struct GNUNET_MessageHeader,
302 GNUNET_MQ_handler_end ()
304 struct GNUNET_MQ_MessageHandler no_learn_handlers[] = {
305 GNUNET_MQ_handler_end ()
307 if ((! bootstrapping) && (! learning)
309 && (! provide_hostlist)
313 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
314 _("None of the functions for the hostlist daemon were enabled. I have no reason to run!\n"));
317 stats = GNUNET_STATISTICS_create ("hostlist", cfg);
324 GNUNET_HOSTLIST_client_start (cfg,
331 GNUNET_CORE_connect (cfg,
336 learning ? learn_handlers : no_learn_handlers);
340 if (provide_hostlist)
341 GNUNET_HOSTLIST_server_start (cfg,
347 GNUNET_SCHEDULER_add_shutdown (&cleaning_task,
352 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
353 _("Failed to connect to `%s' service.\n"), "core");
354 GNUNET_SCHEDULER_shutdown ();
361 * The main function for the hostlist daemon.
363 * @param argc number of arguments from the command line
364 * @param argv command line arguments
365 * @return 0 ok, 1 on error
368 main (int argc, char *const *argv)
370 struct GNUNET_GETOPT_CommandLineOption options[] = {
372 GNUNET_GETOPT_option_flag ('a',
374 gettext_noop ("advertise our hostlist to other peers"),
377 GNUNET_GETOPT_option_flag ('b',
379 gettext_noop ("bootstrap using hostlists (it is highly recommended that you always use this option)"),
381 GNUNET_GETOPT_option_flag ('e',
383 gettext_noop ("enable learning about hostlist servers from other peers"),
386 GNUNET_GETOPT_option_flag ('p',
388 gettext_noop ("provide a hostlist server"),
391 GNUNET_GETOPT_OPTION_END
396 if (GNUNET_OK != GNUNET_STRINGS_get_utf8_args (argc, argv, &argc, &argv))
399 GNUNET_log_setup ("hostlist", "WARNING", NULL);
402 GNUNET_PROGRAM_run (argc, argv,
404 _("GNUnet hostlist server and client"),
406 &run, NULL)) ? 0 : 1;
407 GNUNET_free ((void*) argv);
411 /* end of gnunet-daemon-hostlist.c */