2 This file is part of GNUnet.
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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"
35 static struct GNUNET_RPS_Handle *rps_handle;
40 static struct GNUNET_RPS_Request_Handle *req_handle;
43 * PeerID (Option --seed)
45 static struct GNUNET_PeerIdentity *peer_id;
51 static struct GNUNET_SCHEDULER_Task *shutdown_task;
55 * Set an option of type 'struct GNUNET_PeerIdentity *' from the command line.
56 * A pointer to this function should be passed as part of the
57 * 'struct GNUNET_GETOPT_CommandLineOption' array to initialize options
58 * of this type. It should be followed by a pointer to a value of
59 * type 'struct GNUNET_PeerIdentity *', which will be allocated with the requested string.
61 * @param ctx command line processing context
62 * @param scls additional closure (will point to the 'char *',
63 * which will be allocated)
64 * @param option name of the option
65 * @param value actual value of the option (a PeerID)
69 GNUNET_GETOPT_set_peerid (struct GNUNET_GETOPT_CommandLineProcessorContext *ctx,
70 void *scls, const char *option, const char *value)
72 struct GNUNET_PeerIdentity **val = (struct GNUNET_PeerIdentity **) scls;
74 GNUNET_assert (NULL != value);
75 GNUNET_free_non_null (*val);
76 /* Not quite sure whether that is a sane way */
77 *val = GNUNET_new (struct GNUNET_PeerIdentity);
79 GNUNET_CRYPTO_eddsa_public_key_from_string (value,
81 &((*val)->public_key)))
83 FPRINTF (stderr, "Invalid peer ID %s\n", value);
91 * Task run when user presses CTRL-C to abort.
92 * Cancels pending request and disconnects.
97 do_shutdown (void *cls)
100 if (NULL != req_handle)
101 GNUNET_RPS_request_cancel (req_handle);
102 GNUNET_RPS_disconnect (rps_handle);
107 * Callback called on receipt of reply.
108 * Prints replied PeerIDs.
111 * @param n number of peers
112 * @param recv_peers the received peers
115 reply_handle (void *cls,
117 const struct GNUNET_PeerIdentity *recv_peers)
122 for (i = 0; i < n; i++)
124 FPRINTF (stdout, "%s\n",
125 GNUNET_i2s_full (&recv_peers[i]));
129 GNUNET_SCHEDULER_cancel (shutdown_task);
130 GNUNET_SCHEDULER_add_now (do_shutdown, NULL);
135 * Main function that will be run by the scheduler.
138 * @param args remaining command-line arguments
139 * @param cfgfile name of the configuration file used (for saving, can be NULL!)
140 * @param cfg configuration
146 const struct GNUNET_CONFIGURATION_Handle *cfg)
148 static uint64_t num_peers;
150 rps_handle = GNUNET_RPS_connect (cfg);
153 { /* Request n PeerIDs */
154 /* If number was specified use it, else request single peer. */
155 num_peers = (NULL == args[0]) ? 1 : atoi (args[0]);
156 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
157 "Requesting %u PeerIDs\n", num_peers);
158 req_handle = GNUNET_RPS_request_peers (rps_handle, num_peers, reply_handle, NULL);
159 shutdown_task = GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
164 GNUNET_RPS_seed_ids (rps_handle, 1, peer_id);
165 FPRINTF (stdout, "Seeded PeerID %s\n", GNUNET_i2s_full (peer_id));
167 GNUNET_SCHEDULER_add_now (do_shutdown, NULL);
172 * The main function to rps.
174 * @param argc number of arguments from the command line
175 * @param argv command line arguments
176 * @return 0 ok, 1 on error
179 main (int argc, char *const *argv)
181 const char helpstr[] =
182 "Get random GNUnet peers. If none is specified a single is requested.";
183 static const struct GNUNET_GETOPT_CommandLineOption options[] = {
184 {'s', "seed", "PEER_ID",
185 gettext_noop ("Seed a PeerID"),
186 GNUNET_YES, &GNUNET_GETOPT_set_peerid, &peer_id},
187 GNUNET_GETOPT_OPTION_END
190 GNUNET_PROGRAM_run (argc,
192 "gnunet-rps [NUMBER_OF_PEERS]",
195 options, &run, NULL)) ? ret : 1;
198 /* end of gnunet-rps.c */