2 This file is part of GNUnet.
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6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
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22 * @file rps/gnunet-rps.c
23 * @brief random peer sampling
24 * @author Julius Bünger
27 #include "gnunet_util_lib.h"
28 #include "gnunet_rps_service.h"
36 static struct GNUNET_RPS_Handle *rps_handle;
41 static struct GNUNET_RPS_Request_Handle *req_handle;
44 * PeerID (Option --seed)
46 static struct GNUNET_PeerIdentity peer_id;
49 * @brief Do we want to receive updates of the view? (Option --view)
51 static int view_update;
54 * @brief Number of updates we want to receive
56 static uint64_t num_view_updates;
60 * Task run when user presses CTRL-C to abort.
61 * Cancels pending request and disconnects.
66 do_shutdown (void *cls)
68 if (NULL != req_handle)
69 GNUNET_RPS_request_cancel (req_handle);
70 GNUNET_RPS_disconnect (rps_handle);
75 * Callback called on receipt of reply.
76 * Prints replied PeerIDs.
79 * @param n number of peers
80 * @param recv_peers the received peers
83 reply_handle (void *cls,
85 const struct GNUNET_PeerIdentity *recv_peers)
90 for (i = 0; i < n; i++)
92 FPRINTF (stdout, "%s\n",
93 GNUNET_i2s_full (&recv_peers[i]));
97 GNUNET_SCHEDULER_shutdown ();
101 * Callback called on receipt view update.
104 * @param n number of peers
105 * @param recv_peers the received peers
108 view_update_handle (void *cls,
110 const struct GNUNET_PeerIdentity *recv_peers)
116 FPRINTF (stdout, "Empty view\n");
119 for (i = 0; i < n; i++)
121 FPRINTF (stdout, "%s\n",
122 GNUNET_i2s_full (&recv_peers[i]));
125 if (1 == num_view_updates)
128 GNUNET_SCHEDULER_shutdown ();
130 else if (1 < num_view_updates)
138 * Main function that will be run by the scheduler.
141 * @param args remaining command-line arguments
142 * @param cfgfile name of the configuration file used (for saving, can be NULL!)
143 * @param cfg configuration
149 const struct GNUNET_CONFIGURATION_Handle *cfg)
151 static uint64_t num_peers;
152 static struct GNUNET_PeerIdentity zero_pid;
154 rps_handle = GNUNET_RPS_connect (cfg);
156 if ((0 == memcmp (&zero_pid, &peer_id, sizeof (peer_id))) &&
158 { /* Request n PeerIDs */
159 /* If number was specified use it, else request single peer. */
160 num_peers = (NULL == args[0]) ? 1 : atoi (args[0]);
161 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
162 "Requesting %" PRIu64 " PeerIDs\n", num_peers);
163 req_handle = GNUNET_RPS_request_peers (rps_handle, num_peers, reply_handle, NULL);
164 GNUNET_SCHEDULER_add_shutdown (&do_shutdown, NULL);
165 } else if (view_update)
167 /* Get updates of view */
168 num_view_updates = (NULL == args[0]) ? 0 : atoi (args[0]);
169 GNUNET_RPS_view_request (rps_handle, num_view_updates, view_update_handle, NULL);
170 if (0 != num_view_updates)
171 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
172 "Requesting %" PRIu64 " view updates\n", num_view_updates);
174 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
175 "Requesting contiuous view updates\n");
176 GNUNET_SCHEDULER_add_shutdown (&do_shutdown, NULL);
180 GNUNET_RPS_seed_ids (rps_handle, 1, &peer_id);
181 FPRINTF (stdout, "Seeded PeerID %s\n", GNUNET_i2s_full (&peer_id));
183 GNUNET_SCHEDULER_add_now (&do_shutdown, NULL);
188 * The main function to rps.
190 * @param argc number of arguments from the command line
191 * @param argv command line arguments
192 * @return 0 ok, 1 on error
195 main (int argc, char *const *argv)
197 const char helpstr[] =
198 "Get random GNUnet peers. If none is specified a single is requested.";
199 struct GNUNET_GETOPT_CommandLineOption options[] = {
200 GNUNET_GETOPT_option_base32_auto ('s',
203 gettext_noop ("Seed a PeerID"),
205 GNUNET_GETOPT_option_flag ('V',
207 gettext_noop ("Get updates of view (0 for infinite updates)"),
209 GNUNET_GETOPT_OPTION_END
212 GNUNET_PROGRAM_run (argc,
214 "gnunet-rps [NUMBER_OF_PEERS]",
217 options, &run, NULL)) ? ret : 1;
220 /* end of gnunet-rps.c */