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
8 option) any later version.
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
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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;
50 * Set an option of type 'struct GNUNET_PeerIdentity *' from the command line.
51 * A pointer to this function should be passed as part of the
52 * 'struct GNUNET_GETOPT_CommandLineOption' array to initialize options
53 * of this type. It should be followed by a pointer to a value of
54 * type 'struct GNUNET_PeerIdentity *', which will be allocated with the requested string.
56 * @param ctx command line processing context
57 * @param scls additional closure (will point to the 'char *',
58 * which will be allocated)
59 * @param option name of the option
60 * @param value actual value of the option (a PeerID)
64 GNUNET_GETOPT_set_peerid (struct GNUNET_GETOPT_CommandLineProcessorContext *ctx,
65 void *scls, const char *option, const char *value)
67 struct GNUNET_PeerIdentity **val = (struct GNUNET_PeerIdentity **) scls;
69 GNUNET_assert (NULL != value);
70 GNUNET_free_non_null (*val);
71 /* Not quite sure whether that is a sane way */
72 *val = GNUNET_new (struct GNUNET_PeerIdentity);
74 GNUNET_CRYPTO_eddsa_public_key_from_string (value,
76 &((*val)->public_key)))
78 FPRINTF (stderr, "Invalid peer ID %s\n", value);
86 * Task run when user presses CTRL-C to abort.
87 * Cancels pending request and disconnects.
92 do_shutdown (void *cls)
94 if (NULL != req_handle)
95 GNUNET_RPS_request_cancel (req_handle);
96 GNUNET_RPS_disconnect (rps_handle);
101 * Callback called on receipt of reply.
102 * Prints replied PeerIDs.
105 * @param n number of peers
106 * @param recv_peers the received peers
109 reply_handle (void *cls,
111 const struct GNUNET_PeerIdentity *recv_peers)
116 for (i = 0; i < n; i++)
118 FPRINTF (stdout, "%s\n",
119 GNUNET_i2s_full (&recv_peers[i]));
123 GNUNET_SCHEDULER_shutdown ();
128 * Main function that will be run by the scheduler.
131 * @param args remaining command-line arguments
132 * @param cfgfile name of the configuration file used (for saving, can be NULL!)
133 * @param cfg configuration
139 const struct GNUNET_CONFIGURATION_Handle *cfg)
141 static uint64_t num_peers;
143 rps_handle = GNUNET_RPS_connect (cfg);
146 { /* Request n PeerIDs */
147 /* If number was specified use it, else request single peer. */
148 num_peers = (NULL == args[0]) ? 1 : atoi (args[0]);
149 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
150 "Requesting %" PRIu64 " PeerIDs\n", num_peers);
151 req_handle = GNUNET_RPS_request_peers (rps_handle, num_peers, reply_handle, NULL);
152 GNUNET_SCHEDULER_add_shutdown (&do_shutdown, NULL);
156 GNUNET_RPS_seed_ids (rps_handle, 1, peer_id);
157 FPRINTF (stdout, "Seeded PeerID %s\n", GNUNET_i2s_full (peer_id));
159 GNUNET_SCHEDULER_add_now (&do_shutdown, NULL);
164 * The main function to rps.
166 * @param argc number of arguments from the command line
167 * @param argv command line arguments
168 * @return 0 ok, 1 on error
171 main (int argc, char *const *argv)
173 const char helpstr[] =
174 "Get random GNUnet peers. If none is specified a single is requested.";
175 static const struct GNUNET_GETOPT_CommandLineOption options[] = {
176 {'s', "seed", "PEER_ID",
177 gettext_noop ("Seed a PeerID"),
178 GNUNET_YES, &GNUNET_GETOPT_set_peerid, &peer_id},
179 GNUNET_GETOPT_OPTION_END
182 GNUNET_PROGRAM_run (argc,
184 "gnunet-rps [NUMBER_OF_PEERS]",
187 options, &run, NULL)) ? ret : 1;
190 /* end of gnunet-rps.c */