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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;
49 * Set an option of type 'struct GNUNET_PeerIdentity *' from the command line.
50 * A pointer to this function should be passed as part of the
51 * 'struct GNUNET_GETOPT_CommandLineOption' array to initialize options
52 * of this type. It should be followed by a pointer to a value of
53 * type 'struct GNUNET_PeerIdentity *', which will be allocated with the requested string.
55 * @param ctx command line processing context
56 * @param scls additional closure (will point to the 'char *',
57 * which will be allocated)
58 * @param option name of the option
59 * @param value actual value of the option (a PeerID)
63 GNUNET_GETOPT_set_peerid (struct GNUNET_GETOPT_CommandLineProcessorContext *ctx,
64 void *scls, const char *option, const char *value)
66 struct GNUNET_PeerIdentity **val = (struct GNUNET_PeerIdentity **) scls;
68 GNUNET_assert (NULL != value);
69 GNUNET_free_non_null (*val);
70 /* Not quite sure whether that is a sane way */
71 *val = GNUNET_new (struct GNUNET_PeerIdentity);
73 GNUNET_CRYPTO_eddsa_public_key_from_string (value,
75 &((*val)->public_key)))
77 FPRINTF (stderr, "Invalid peer ID %s\n", value);
85 * Task run when user presses CTRL-C to abort.
86 * Cancels pending request and disconnects.
91 do_shutdown (void *cls)
93 if (NULL != req_handle)
94 GNUNET_RPS_request_cancel (req_handle);
95 GNUNET_RPS_disconnect (rps_handle);
100 * Callback called on receipt of reply.
101 * Prints replied PeerIDs.
104 * @param n number of peers
105 * @param recv_peers the received peers
108 reply_handle (void *cls,
110 const struct GNUNET_PeerIdentity *recv_peers)
115 for (i = 0; i < n; i++)
117 FPRINTF (stdout, "%s\n",
118 GNUNET_i2s_full (&recv_peers[i]));
122 GNUNET_SCHEDULER_shutdown ();
127 * Main function that will be run by the scheduler.
130 * @param args remaining command-line arguments
131 * @param cfgfile name of the configuration file used (for saving, can be NULL!)
132 * @param cfg configuration
138 const struct GNUNET_CONFIGURATION_Handle *cfg)
140 static uint64_t num_peers;
142 rps_handle = GNUNET_RPS_connect (cfg);
145 { /* Request n PeerIDs */
146 /* If number was specified use it, else request single peer. */
147 num_peers = (NULL == args[0]) ? 1 : atoi (args[0]);
148 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
149 "Requesting %u PeerIDs\n", num_peers);
150 req_handle = GNUNET_RPS_request_peers (rps_handle, num_peers, reply_handle, NULL);
151 GNUNET_SCHEDULER_add_shutdown (&do_shutdown, NULL);
155 GNUNET_RPS_seed_ids (rps_handle, 1, peer_id);
156 FPRINTF (stdout, "Seeded PeerID %s\n", GNUNET_i2s_full (peer_id));
158 GNUNET_SCHEDULER_add_now (&do_shutdown, NULL);
163 * The main function to rps.
165 * @param argc number of arguments from the command line
166 * @param argv command line arguments
167 * @return 0 ok, 1 on error
170 main (int argc, char *const *argv)
172 const char helpstr[] =
173 "Get random GNUnet peers. If none is specified a single is requested.";
174 static const struct GNUNET_GETOPT_CommandLineOption options[] = {
175 {'s', "seed", "PEER_ID",
176 gettext_noop ("Seed a PeerID"),
177 GNUNET_YES, &GNUNET_GETOPT_set_peerid, &peer_id},
178 GNUNET_GETOPT_OPTION_END
181 GNUNET_PROGRAM_run (argc,
183 "gnunet-rps [NUMBER_OF_PEERS]",
186 options, &run, NULL)) ? ret : 1;
189 /* end of gnunet-rps.c */