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22 * @file rps/gnunet-service-rps.c
23 * @brief rps service implementation
24 * @author Julius Bünger
27 #include "gnunet_util_lib.h"
28 #include "gnunet_cadet_service.h"
29 #include "gnunet_nse_service.h"
32 #include "gnunet-service-rps_sampler.h"
37 #define LOG(kind, ...) GNUNET_log(kind, __VA_ARGS__)
39 // TODO modify @brief in every file
41 // TODO check for overflows
43 // TODO align message structs
45 // (TODO api -- possibility of getting weak random peer immideately)
47 // TODO malicious peer
49 // TODO connect to friends
51 // TODO store peers somewhere
55 // hist_size_init, hist_size_max
60 static const struct GNUNET_CONFIGURATION_Handle *cfg;
65 static struct GNUNET_PeerIdentity own_identity;
68 struct GNUNET_PeerIdentity *
69 get_rand_peer_ignore_list (const struct GNUNET_PeerIdentity *peer_list, unsigned int size,
70 const struct GNUNET_PeerIdentity *ignore_list, unsigned int ignore_size);
73 /***********************************************************************
74 * Housekeeping with peers
75 ***********************************************************************/
78 * Struct used to store the context of a connected client.
83 * The message queue to communicate with the client.
85 struct GNUNET_MQ_Handle *mq;
89 * Used to keep track in what lists single peerIDs are.
93 PULL_REPLY_PENDING = 0x01,
94 IN_OTHER_GOSSIP_LIST = 0x02, // unneeded?
95 IN_OWN_SAMPLER_LIST = 0x04, // unneeded?
96 IN_OWN_GOSSIP_LIST = 0x08, // unneeded?
99 * We set this bit when we can be sure the other peer is/was live.
106 * Functions of this type can be used to be stored at a peer for later execution.
108 typedef void (* PeerOp) (void *cls, const struct GNUNET_PeerIdentity *peer);
111 * Outstanding operation on peer consisting of callback and closure
113 struct PeerOutstandingOp
128 * Struct used to keep track of other peer's status
130 * This is stored in a multipeermap.
135 * In own gossip/sampler list, in other's gossip/sampler list
140 * Message queue open to client
142 struct GNUNET_MQ_Handle *mq;
145 * Channel open to client.
147 struct GNUNET_CADET_Channel *send_channel;
150 * Channel open from client.
152 struct GNUNET_CADET_Channel *recv_channel; // unneeded?
155 * Array of outstanding operations on this peer.
157 struct PeerOutstandingOp *outstanding_ops;
160 * Number of outstanding operations.
162 unsigned int num_outstanding_ops;
163 //size_t num_outstanding_ops;
166 * Handle to the callback given to cadet_ntfy_tmt_rdy()
168 * To be canceled on shutdown.
170 struct GNUNET_CADET_TransmitHandle *is_live_task;
173 * Identity of the peer
175 struct GNUNET_PeerIdentity peer_id;
178 * This is pobably followed by 'statistical' data (when we first saw
179 * him, how did we get his ID, how many pushes (in a timeinterval),
184 /***********************************************************************
185 * /Housekeeping with peers
186 ***********************************************************************/
188 /***********************************************************************
190 ***********************************************************************/
193 * Set of all peers to keep track of them.
195 static struct GNUNET_CONTAINER_MultiPeerMap *peer_map;
199 * The gossiped list of peers.
201 static struct GNUNET_PeerIdentity *gossip_list;
204 * Size of the gossiped list
206 //static unsigned int gossip_list_size;
207 static uint32_t gossip_list_size;
211 * The size of sampler we need to be able to satisfy the client's need of
214 static unsigned int sampler_size_client_need;
217 * The size of sampler we need to be able to satisfy the Brahms protocol's
218 * need of random peers.
220 * This is directly taken as the #gossip_list_size on update of the
223 * This is one minimum size the sampler grows to.
225 static unsigned int sampler_size_est_need;
229 * Percentage of total peer number in the gossip list
230 * to send random PUSHes to
235 * Percentage of total peer number in the gossip list
236 * to send random PULLs to
241 * The percentage gamma of history updates.
242 * Simply 1 - alpha - beta
247 * Identifier for the main task that runs periodically.
249 static struct GNUNET_SCHEDULER_Task *do_round_task;
252 * Time inverval the do_round task runs in.
254 static struct GNUNET_TIME_Relative round_interval;
259 * List to store peers received through pushes temporary.
261 * TODO -> multipeermap
263 static struct GNUNET_PeerIdentity *push_list;
266 * Size of the push_list;
268 static unsigned int push_list_size;
269 //size_t push_list_size;
272 * List to store peers received through pulls temporary.
274 * TODO -> multipeermap
276 static struct GNUNET_PeerIdentity *pull_list;
279 * Size of the pull_list;
281 static unsigned int pull_list_size;
282 //size_t pull_list_size;
288 static struct GNUNET_NSE_Handle *nse;
293 static struct GNUNET_CADET_Handle *cadet_handle;
299 * Only needed in the beginning to check how many of the 64 deltas
302 static unsigned int req_counter;
305 * Time of the last request we received.
307 * Used to compute the expected request rate.
309 static struct GNUNET_TIME_Absolute last_request;
312 * Size of #request_deltas.
314 #define REQUEST_DELTAS_SIZE 64
315 static unsigned int request_deltas_size = REQUEST_DELTAS_SIZE;
318 * Last 64 deltas between requests
320 static struct GNUNET_TIME_Relative request_deltas[REQUEST_DELTAS_SIZE];
323 * The prediction of the rate of requests
325 static struct GNUNET_TIME_Relative request_rate;
329 * List with the peers we sent requests to.
331 struct GNUNET_PeerIdentity *pending_pull_reply_list;
334 * Size of #pending_pull_reply_list.
336 uint32_t pending_pull_reply_list_size;
340 * Number of history update tasks.
342 uint32_t num_hist_update_tasks;
345 /***********************************************************************
347 ***********************************************************************/
350 /***********************************************************************
352 ***********************************************************************/
355 * Check if peer is already in peer array.
358 in_arr (const struct GNUNET_PeerIdentity *array,
359 unsigned int arr_size,
360 const struct GNUNET_PeerIdentity *peer)
362 GNUNET_assert (NULL != peer);
367 GNUNET_assert (NULL != array);
372 while (0 != GNUNET_CRYPTO_cmp_peer_identity (&array[i], peer) &&
383 * Remove peer from list.
386 rem_from_list (struct GNUNET_PeerIdentity *peer_list,
387 unsigned int *list_size,
388 const struct GNUNET_PeerIdentity *peer)
392 for ( i = 0 ; i < *list_size ; i++ )
394 if (0 == GNUNET_CRYPTO_cmp_peer_identity (&peer_list[i], peer))
396 if (i < *list_size -1)
397 { /* Not at the last entry -- shift peers left */
398 memcpy (&peer_list[i], &peer_list[i +1],
399 (*list_size - i -1) * sizeof (struct GNUNET_PeerIdentity));
401 /* Remove last entry (should be now useless PeerID) */
402 GNUNET_array_grow (peer_list, *list_size, *list_size -1);
408 * Get random peer from the given list but don't return one from the @a ignore_list.
410 struct GNUNET_PeerIdentity *
411 get_rand_peer_ignore_list (const struct GNUNET_PeerIdentity *peer_list,
413 const struct GNUNET_PeerIdentity *ignore_list,
414 uint32_t ignore_size)
418 struct GNUNET_PeerIdentity *tmp_peer_list;
419 struct GNUNET_PeerIdentity *peer;
421 GNUNET_assert (NULL != peer_list);
426 tmp_peer_list = NULL;
427 GNUNET_array_grow (tmp_peer_list, tmp_size, list_size);
428 memcpy (tmp_peer_list, peer_list, list_size * sizeof (struct GNUNET_PeerIdentity));
429 peer = GNUNET_new (struct GNUNET_PeerIdentity);
432 * Choose the r_index of the peer we want to return
433 * at random from the interval of the gossip list
435 r_index = GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_STRONG,
437 *peer = tmp_peer_list[r_index];
439 while (in_arr (ignore_list, ignore_size, peer))
441 rem_from_list (tmp_peer_list, &tmp_size, peer);
450 * Choose the r_index of the peer we want to return
451 * at random from the interval of the gossip list
453 r_index = GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_STRONG,
455 *peer = tmp_peer_list[r_index];
459 GNUNET_array_grow (tmp_peer_list, tmp_size, 0);
466 * Get the context of a peer. If not existing, create.
469 get_peer_ctx (struct GNUNET_CONTAINER_MultiPeerMap *peer_map,
470 const struct GNUNET_PeerIdentity *peer)
472 struct PeerContext *ctx;
474 if ( GNUNET_YES == GNUNET_CONTAINER_multipeermap_contains (peer_map, peer))
476 ctx = GNUNET_CONTAINER_multipeermap_get (peer_map, peer);
480 ctx = GNUNET_new (struct PeerContext);
483 ctx->send_channel = NULL;
484 ctx->recv_channel = NULL;
485 ctx->outstanding_ops = NULL;
486 ctx->num_outstanding_ops = 0;
487 (void) GNUNET_CONTAINER_multipeermap_put (peer_map, peer, ctx,
488 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
495 * Put random peer from sampler into the gossip list as history update.
498 hist_update (void *cls, struct GNUNET_PeerIdentity *ids, uint32_t num_peers)
500 GNUNET_assert (1 == num_peers);
502 if (gossip_list_size < sampler_size_est_need)
503 GNUNET_array_append (gossip_list, gossip_list_size, *ids);
505 if (0 < num_hist_update_tasks)
506 num_hist_update_tasks--;
511 * Callback that is called when a channel was effectively established.
512 * This is given to ntfy_tmt_rdy and called when the channel was
513 * successfully established.
516 peer_is_live (void *cls, size_t size, void *buf)
518 struct PeerContext *ctx = cls;
519 struct GNUNET_PeerIdentity *peer;
520 struct PeerContext *peer_ctx;
526 ctx->is_live_task = NULL;
527 peer = &ctx->peer_id;
528 peer_ctx = get_peer_ctx (peer_map, peer);
529 peer_ctx->peer_flags |= LIVING;
531 LOG (GNUNET_ERROR_TYPE_DEBUG, "Peer %s is live\n", GNUNET_i2s (peer));
533 if (0 != peer_ctx->num_outstanding_ops)
534 { /* Call outstanding operations */
537 for ( i = 0 ; i < peer_ctx->num_outstanding_ops ; i++ )
538 peer_ctx->outstanding_ops[i].op (peer_ctx->outstanding_ops[i].op_cls, peer);
539 GNUNET_array_grow (peer_ctx->outstanding_ops, peer_ctx->num_outstanding_ops, 0);
542 //if (NULL != peer_ctx->is_live_task)
544 // GNUNET_CADET_notify_transmit_ready_cancel (peer_ctx->is_live_task);
545 // peer_ctx->is_live_task = NULL; // needed?
552 * Get the channel of a peer. If not existing, create.
554 struct GNUNET_CADET_Channel *
555 get_channel (struct GNUNET_CONTAINER_MultiPeerMap *peer_map,
556 const struct GNUNET_PeerIdentity *peer)
558 struct PeerContext *ctx;
560 ctx = get_peer_ctx (peer_map, peer);
561 if (NULL == ctx->send_channel)
563 ctx->send_channel = GNUNET_CADET_channel_create (cadet_handle, NULL, peer,
564 GNUNET_RPS_CADET_PORT,
565 GNUNET_CADET_OPTION_RELIABLE);
567 if (NULL == ctx->recv_channel)
569 ctx->peer_id = *peer;
571 GNUNET_CADET_notify_transmit_ready (ctx->send_channel, GNUNET_NO,
572 GNUNET_TIME_UNIT_FOREVER_REL,
573 sizeof (struct GNUNET_MessageHeader),
577 // do I have to explicitly put it in the peer_map?
578 (void) GNUNET_CONTAINER_multipeermap_put (peer_map, peer, ctx,
579 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
581 return ctx->send_channel;
586 * Get the message queue of a specific peer.
588 * If we already have a message queue open to this client,
589 * simply return it, otherways create one.
591 struct GNUNET_MQ_Handle *
592 get_mq (struct GNUNET_CONTAINER_MultiPeerMap *peer_map,
593 const struct GNUNET_PeerIdentity *peer_id)
595 struct PeerContext *ctx;
597 ctx = get_peer_ctx (peer_map, peer_id);
600 (void) get_channel (peer_map, peer_id);
601 ctx->mq = GNUNET_CADET_mq_create (ctx->send_channel);
602 //do I have to explicitly put it in the peer_map?
603 (void) GNUNET_CONTAINER_multipeermap_put (peer_map, peer_id, ctx,
604 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
611 * Sum all time relatives of an array.
613 struct GNUNET_TIME_Relative
614 T_relative_sum (const struct GNUNET_TIME_Relative *rel_array, uint32_t arr_size)
616 struct GNUNET_TIME_Relative sum;
619 sum = GNUNET_TIME_UNIT_ZERO;
620 for ( i = 0 ; i < arr_size ; i++ )
622 sum = GNUNET_TIME_relative_add (sum, rel_array[i]);
629 * Compute the average of given time relatives.
631 struct GNUNET_TIME_Relative
632 T_relative_avg (const struct GNUNET_TIME_Relative *rel_array, uint32_t arr_size)
634 return GNUNET_TIME_relative_divide (T_relative_sum (rel_array, arr_size), arr_size);
639 * Insert PeerID in #pull_list
641 * Called once we know a peer is live.
644 insert_in_pull_list (void *cls, const struct GNUNET_PeerIdentity *peer)
646 if (GNUNET_NO == in_arr (pull_list, pull_list_size, peer))
647 GNUNET_array_append (pull_list, pull_list_size, *peer);
651 * Check whether #insert_in_pull_list was already scheduled
654 insert_in_pull_list_scheduled (const struct PeerContext *peer_ctx)
658 for ( i = 0 ; i < peer_ctx->num_outstanding_ops ; i++ )
659 if (insert_in_pull_list == peer_ctx->outstanding_ops[i].op)
666 * Insert PeerID in #gossip_list
668 * Called once we know a peer is live.
671 insert_in_gossip_list (void *cls, const struct GNUNET_PeerIdentity *peer)
673 if (GNUNET_NO == in_arr (gossip_list, gossip_list_size, peer))
674 GNUNET_array_append (gossip_list, gossip_list_size, *peer);
678 * Check whether #insert_in_pull_list was already scheduled
681 insert_in_gossip_list_scheduled (const struct PeerContext *peer_ctx)
685 for ( i = 0 ; i < peer_ctx->num_outstanding_ops ; i++ )
686 if (insert_in_gossip_list == peer_ctx->outstanding_ops[i].op)
693 * Update sampler with given PeerID.
696 insert_in_sampler (void *cls, const struct GNUNET_PeerIdentity *peer)
698 RPS_sampler_update_list (peer);
703 * Check whether #insert_in_sampler was already scheduled
706 insert_in_sampler_scheduled (const struct PeerContext *peer_ctx)
710 for ( i = 0 ; i < peer_ctx->num_outstanding_ops ; i++ )
711 if (insert_in_sampler== peer_ctx->outstanding_ops[i].op)
718 * Wrapper around #RPS_sampler_resize()
723 uint32_t bigger_size;
724 unsigned int sampler_size;
728 if (sampler_size_est_need > sampler_size_client_need)
729 bigger_size = sampler_size_est_need;
731 bigger_size = sampler_size_client_need;
733 // TODO respect the min, max
734 sampler_size = RPS_sampler_get_size ();
735 if (sampler_size > bigger_size * 4)
737 RPS_sampler_resize (sampler_size / 2);
739 else if (sampler_size < bigger_size)
741 RPS_sampler_resize (sampler_size * 2);
743 LOG (GNUNET_ERROR_TYPE_DEBUG, "sampler_size is now %u\n", sampler_size);
748 * Estimate request rate
750 * Called every time we receive a request from the client.
755 struct GNUNET_TIME_Relative max_round_duration;
757 if (request_deltas_size > req_counter)
759 if ( 1 < req_counter)
761 /* Shift last request deltas to the right */
762 memcpy (&request_deltas[1],
764 (req_counter - 1) * sizeof (struct GNUNET_TIME_Relative));
766 /* Add current delta to beginning */
768 GNUNET_TIME_absolute_get_difference (last_request,
769 GNUNET_TIME_absolute_get ());
770 request_rate = T_relative_avg (request_deltas, req_counter);
772 /* Compute the duration a round will maximally take */
774 GNUNET_TIME_relative_add (round_interval,
775 GNUNET_TIME_relative_divide (round_interval, 2));
777 /* Set the estimated size the sampler has to have to
778 * satisfy the current client request rate */
779 sampler_size_client_need =
780 max_round_duration.rel_value_us / request_rate.rel_value_us;
782 /* Resize the sampler */
785 last_request = GNUNET_TIME_absolute_get ();
789 /***********************************************************************
791 ***********************************************************************/
794 * Function called by NSE.
796 * Updates sizes of sampler list and gossip list and adapt those lists
800 nse_callback (void *cls, struct GNUNET_TIME_Absolute timestamp,
801 double logestimate, double std_dev)
804 //double scale; // TODO this might go gloabal/config
806 LOG (GNUNET_ERROR_TYPE_DEBUG,
807 "Received a ns estimate - logest: %f, std_dev: %f (old_size: %u)\n",
808 logestimate, std_dev, RPS_sampler_get_size ());
810 estimate = GNUNET_NSE_log_estimate_to_n (logestimate);
811 // GNUNET_NSE_log_estimate_to_n (logestimate);
812 estimate = pow (estimate, 1.0 / 3);
813 // TODO add if std_dev is a number
814 // estimate += (std_dev * scale);
815 if (2 < ceil (estimate))
817 LOG (GNUNET_ERROR_TYPE_DEBUG, "Changing estimate to %f\n", estimate);
818 sampler_size_est_need = estimate;
820 LOG (GNUNET_ERROR_TYPE_DEBUG, "Not using estimate %f\n", estimate);
822 /* If the NSE has changed adapt the lists accordingly */
828 * Callback called once the requested PeerIDs are ready.
830 * Sends those to the requesting client.
832 void client_respond (void *cls,
833 struct GNUNET_PeerIdentity *ids, uint32_t num_peers)
835 LOG (GNUNET_ERROR_TYPE_DEBUG, "sampler returned %" PRIX32 " peers\n", num_peers);
836 struct GNUNET_MQ_Envelope *ev;
837 struct GNUNET_RPS_CS_ReplyMessage *out_msg;
838 struct GNUNET_SERVER_Client *client;
839 uint32_t size_needed;
840 struct client_ctx *cli_ctx;
842 client = (struct GNUNET_SERVER_Client *) cls;
844 size_needed = sizeof (struct GNUNET_RPS_CS_ReplyMessage) +
845 num_peers * sizeof (struct GNUNET_PeerIdentity);
847 GNUNET_assert (GNUNET_SERVER_MAX_MESSAGE_SIZE >= size_needed);
849 ev = GNUNET_MQ_msg_extra (out_msg,
850 num_peers * sizeof (struct GNUNET_PeerIdentity),
851 GNUNET_MESSAGE_TYPE_RPS_CS_REPLY);
852 out_msg->num_peers = htonl (num_peers);
856 num_peers * sizeof (struct GNUNET_PeerIdentity));
859 cli_ctx = GNUNET_SERVER_client_get_user_context (client, struct client_ctx);
860 if ( NULL == cli_ctx ) {
861 cli_ctx = GNUNET_new (struct client_ctx);
862 cli_ctx->mq = GNUNET_MQ_queue_for_server_client (client);
863 GNUNET_SERVER_client_set_user_context (client, cli_ctx);
866 GNUNET_MQ_send (cli_ctx->mq, ev);
871 * Handle RPS request from the client.
874 * @param client identification of the client
875 * @param message the actual message
878 handle_client_request (void *cls,
879 struct GNUNET_SERVER_Client *client,
880 const struct GNUNET_MessageHeader *message)
882 struct GNUNET_RPS_CS_RequestMessage *msg;
884 uint32_t size_needed;
887 msg = (struct GNUNET_RPS_CS_RequestMessage *) message;
889 num_peers = ntohl (msg->num_peers);
890 size_needed = sizeof (struct GNUNET_RPS_CS_ReplyMessage) +
891 num_peers * sizeof (struct GNUNET_PeerIdentity);
893 if (GNUNET_SERVER_MAX_MESSAGE_SIZE < size_needed)
895 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
899 for (i = 0 ; i < num_peers ; i++)
902 LOG (GNUNET_ERROR_TYPE_DEBUG, "Client requested %" PRIX32 " random peer(s).\n", num_peers);
904 RPS_sampler_get_n_rand_peers (client_respond, client, num_peers, GNUNET_YES);
906 GNUNET_SERVER_receive_done (client,
912 * Handle seed from the client.
915 * @param client identification of the client
916 * @param message the actual message
919 handle_client_seed (void *cls,
920 struct GNUNET_SERVER_Client *client,
921 const struct GNUNET_MessageHeader *message)
923 struct GNUNET_RPS_CS_SeedMessage *in_msg;
924 struct GNUNET_PeerIdentity *peers;
927 if (sizeof (struct GNUNET_RPS_CS_SeedMessage) < ntohs (message->size))
930 GNUNET_SERVER_receive_done (client,
933 in_msg = (struct GNUNET_RPS_CS_SeedMessage *) message;
934 if ((ntohs (message->size) - sizeof (struct GNUNET_RPS_CS_SeedMessage)) /
935 sizeof (struct GNUNET_PeerIdentity) != ntohl (in_msg->num_peers))
938 GNUNET_SERVER_receive_done (client,
942 in_msg = (struct GNUNET_RPS_CS_SeedMessage *) message;
943 peers = (struct GNUNET_PeerIdentity *) &message[1];
945 for ( i = 0 ; i < ntohl (in_msg->num_peers) ; i++ )
946 RPS_sampler_update_list (&peers[i]);
948 GNUNET_SERVER_receive_done (client,
954 * Handle a PUSH message from another peer.
956 * Check the proof of work and store the PeerID
957 * in the temporary list for pushed PeerIDs.
960 * @param channel The channel the PUSH was received over
961 * @param channel_ctx The context associated with this channel
962 * @param msg The message header
965 handle_peer_push (void *cls,
966 struct GNUNET_CADET_Channel *channel,
968 const struct GNUNET_MessageHeader *msg)
970 const struct GNUNET_PeerIdentity *peer;
972 // (check the proof of work)
974 peer = (const struct GNUNET_PeerIdentity *) GNUNET_CADET_channel_get_info (channel, GNUNET_CADET_OPTION_PEER);
975 // FIXME wait for cadet to change this function
976 LOG (GNUNET_ERROR_TYPE_DEBUG, "PUSH received (%s)\n", GNUNET_i2s (peer));
978 /* Add the sending peer to the push_list */
979 if (GNUNET_NO == in_arr (push_list, pull_list_size, peer))
980 GNUNET_array_append (push_list, push_list_size, *peer);
986 * Handle PULL REQUEST request message from another peer.
988 * Reply with the gossip list of PeerIDs.
991 * @param channel The channel the PUSH was received over
992 * @param channel_ctx The context associated with this channel
993 * @param msg The message header
996 handle_peer_pull_request (void *cls,
997 struct GNUNET_CADET_Channel *channel,
999 const struct GNUNET_MessageHeader *msg)
1001 struct GNUNET_PeerIdentity *peer;
1003 struct GNUNET_MQ_Handle *mq;
1004 struct GNUNET_MQ_Envelope *ev;
1005 struct GNUNET_RPS_P2P_PullReplyMessage *out_msg;
1008 peer = (struct GNUNET_PeerIdentity *) GNUNET_CADET_channel_get_info (channel,
1009 GNUNET_CADET_OPTION_PEER);
1010 // FIXME wait for cadet to change this function
1012 /* Compute actual size */
1013 send_size = sizeof (struct GNUNET_RPS_P2P_PullReplyMessage) +
1014 gossip_list_size * sizeof (struct GNUNET_PeerIdentity);
1016 if (GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE < send_size)
1017 /* Compute number of peers to send
1018 * If too long, simply truncate */
1019 send_size = (GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE -
1020 sizeof (struct GNUNET_RPS_P2P_PullReplyMessage)) /
1021 sizeof (struct GNUNET_PeerIdentity);
1023 send_size = gossip_list_size;
1025 LOG (GNUNET_ERROR_TYPE_DEBUG,
1026 "PULL REQUEST from peer %s received, going to send %u peers\n",
1027 GNUNET_i2s (peer), send_size);
1029 mq = get_mq (peer_map, peer);
1031 ev = GNUNET_MQ_msg_extra (out_msg,
1032 send_size * sizeof (struct GNUNET_PeerIdentity),
1033 GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REPLY);
1034 //out_msg->num_peers = htonl (gossip_list_size);
1035 out_msg->num_peers = htonl (send_size);
1036 memcpy (&out_msg[1], gossip_list,
1037 send_size * sizeof (struct GNUNET_PeerIdentity));
1039 GNUNET_MQ_send (mq, ev);
1045 * Handle PULL REPLY message from another peer.
1047 * Check whether we sent a corresponding request and
1048 * whether this reply is the first one.
1050 * @param cls Closure
1051 * @param channel The channel the PUSH was received over
1052 * @param channel_ctx The context associated with this channel
1053 * @param msg The message header
1056 handle_peer_pull_reply (void *cls,
1057 struct GNUNET_CADET_Channel *channel,
1059 const struct GNUNET_MessageHeader *msg)
1061 LOG (GNUNET_ERROR_TYPE_DEBUG, "PULL REPLY received\n");
1063 struct GNUNET_RPS_P2P_PullReplyMessage *in_msg;
1064 struct GNUNET_PeerIdentity *peers;
1065 struct PeerContext *peer_ctx;
1066 struct GNUNET_PeerIdentity *sender;
1067 struct PeerContext *sender_ctx;
1068 struct PeerOutstandingOp out_op;
1071 if (sizeof (struct GNUNET_RPS_P2P_PullReplyMessage) > ntohs (msg->size))
1073 GNUNET_break_op (0); // At the moment our own implementation seems to break that.
1074 return GNUNET_SYSERR;
1076 in_msg = (struct GNUNET_RPS_P2P_PullReplyMessage *) msg;
1077 if ((ntohs (msg->size) - sizeof (struct GNUNET_RPS_P2P_PullReplyMessage)) / sizeof (struct GNUNET_PeerIdentity) != ntohl (in_msg->num_peers))
1079 LOG (GNUNET_ERROR_TYPE_ERROR, "message says it sends %" PRIu64 " peers, have space for %i peers\n",
1080 ntohl (in_msg->num_peers),
1081 (ntohs (msg->size) - sizeof (struct GNUNET_RPS_P2P_PullReplyMessage)) / sizeof (struct GNUNET_PeerIdentity));
1082 GNUNET_break_op (0);
1083 return GNUNET_SYSERR;
1086 sender = (struct GNUNET_PeerIdentity *) GNUNET_CADET_channel_get_info (
1087 (struct GNUNET_CADET_Channel *) channel, GNUNET_CADET_OPTION_PEER);
1088 // Guess simply casting isn't the nicest way...
1089 // FIXME wait for cadet to change this function
1090 sender_ctx = get_peer_ctx (peer_map, sender);
1092 if (0 == (sender_ctx->peer_flags || PULL_REPLY_PENDING))
1094 GNUNET_break_op (0);
1098 peers = (struct GNUNET_PeerIdentity *) &msg[1];
1099 for ( i = 0 ; i < ntohl (in_msg->num_peers) ; i++ )
1101 peer_ctx = get_peer_ctx (peer_map, &peers[i]);
1102 if ((0 != (peer_ctx->peer_flags && LIVING)) ||
1103 NULL != peer_ctx->recv_channel)
1105 if (GNUNET_NO == in_arr (pull_list, pull_list_size, &peers[i]))
1106 GNUNET_array_append (pull_list, pull_list_size, peers[i]);
1108 else if (GNUNET_NO == insert_in_pull_list_scheduled (peer_ctx))
1110 out_op.op = insert_in_pull_list;
1111 out_op.op_cls = NULL;
1112 GNUNET_array_append (peer_ctx->outstanding_ops, peer_ctx->num_outstanding_ops, out_op);
1116 sender_ctx->peer_flags &= (~PULL_REPLY_PENDING);
1117 rem_from_list (pending_pull_reply_list, &pending_pull_reply_list_size, sender);
1124 * Send out PUSHes and PULLs.
1126 * This is executed regylary.
1129 do_round (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1131 LOG (GNUNET_ERROR_TYPE_DEBUG, "Going to execute next round\n");
1134 unsigned int *permut;
1135 unsigned int n_peers; /* Number of peers we send pushes/pulls to */
1136 struct GNUNET_MQ_Envelope *ev;
1137 struct GNUNET_PeerIdentity peer;
1138 struct GNUNET_PeerIdentity *tmp_peer;
1139 struct GNUNET_MQ_Handle *mq;
1141 LOG (GNUNET_ERROR_TYPE_DEBUG,
1142 "Printing gossip list:\n");
1143 for (i = 0 ; i < gossip_list_size ; i++)
1144 LOG (GNUNET_ERROR_TYPE_DEBUG,
1145 "\t%s\n", GNUNET_i2s (&gossip_list[i]));
1146 // TODO log lists, ...
1148 /* Would it make sense to have one shuffeled gossip list and then
1149 * to send PUSHes to first alpha peers, PULL requests to next beta peers and
1150 * use the rest to update sampler?
1151 * in essence get random peers with consumption */
1154 if (0 < gossip_list_size)
1156 permut = GNUNET_CRYPTO_random_permute (GNUNET_CRYPTO_QUALITY_STRONG,
1157 (unsigned int) gossip_list_size);
1158 n_peers = ceil (alpha * gossip_list_size);
1159 LOG (GNUNET_ERROR_TYPE_DEBUG,
1160 "Going to send pushes to %u ceil (%f * %u) peers.\n",
1161 n_peers, alpha, gossip_list_size);
1162 for (i = 0 ; i < n_peers ; i++)
1164 peer = gossip_list[permut[i]];
1165 if (0 != GNUNET_CRYPTO_cmp_peer_identity (&own_identity, &peer)) // TODO
1166 { // FIXME if this fails schedule/loop this for later
1167 LOG (GNUNET_ERROR_TYPE_DEBUG,
1168 "Sending PUSH to peer %s of gossiped list.\n",
1169 GNUNET_i2s (&peer));
1171 ev = GNUNET_MQ_msg_header (GNUNET_MESSAGE_TYPE_RPS_PP_PUSH);
1172 mq = get_mq (peer_map, &peer);
1173 GNUNET_MQ_send (mq, ev);
1176 GNUNET_free (permut);
1180 /* Send PULL requests */
1181 //permut = GNUNET_CRYPTO_random_permute (GNUNET_CRYPTO_QUALITY_STRONG, (unsigned int) sampler_list->size);
1182 n_peers = ceil (beta * gossip_list_size);
1183 LOG (GNUNET_ERROR_TYPE_DEBUG,
1184 "Going to send pulls to %u ceil (%f * %u) peers.\n",
1185 n_peers, beta, gossip_list_size);
1186 for (i = 0 ; i < n_peers ; i++)
1188 tmp_peer = get_rand_peer_ignore_list (gossip_list, gossip_list_size,
1189 pending_pull_reply_list, pending_pull_reply_list_size);
1190 if (NULL != tmp_peer)
1193 GNUNET_free (tmp_peer);
1195 GNUNET_array_append (pending_pull_reply_list, pending_pull_reply_list_size, peer);
1197 if (0 != GNUNET_CRYPTO_cmp_peer_identity (&own_identity, &peer))
1198 { // FIXME if this fails schedule/loop this for later
1199 LOG (GNUNET_ERROR_TYPE_DEBUG,
1200 "Sending PULL request to peer %s of gossiped list.\n",
1201 GNUNET_i2s (&peer));
1203 ev = GNUNET_MQ_msg_header (GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REQUEST);
1204 mq = get_mq (peer_map, &peer);
1205 GNUNET_MQ_send (mq, ev);
1211 /* Update gossip list */
1214 if ( push_list_size <= alpha * gossip_list_size &&
1215 push_list_size != 0 &&
1216 pull_list_size != 0 )
1218 LOG (GNUNET_ERROR_TYPE_DEBUG, "Update of the gossip list.\n");
1220 uint32_t first_border;
1221 uint32_t second_border;
1223 first_border = ceil (alpha * sampler_size_est_need);
1224 second_border = first_border + ceil (beta * sampler_size_est_need);
1226 GNUNET_array_grow (gossip_list, gossip_list_size, second_border);
1228 for (i = 0 ; i < first_border ; i++)
1229 { // TODO use RPS_sampler_get_n_rand_peers
1230 /* Update gossip list with peers received through PUSHes */
1231 r_index = GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_STRONG,
1233 gossip_list[i] = push_list[r_index];
1234 // TODO change the peer_flags accordingly
1237 for (i = first_border ; i < second_border ; i++)
1239 /* Update gossip list with peers received through PULLs */
1240 r_index = GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_STRONG,
1242 gossip_list[i] = pull_list[r_index];
1243 // TODO change the peer_flags accordingly
1246 for (i = second_border ; i < sampler_size_est_need ; i++)
1248 /* Update gossip list with peers from history */
1249 RPS_sampler_get_n_rand_peers (hist_update, NULL, 1, GNUNET_NO);
1250 num_hist_update_tasks++;
1251 // TODO change the peer_flags accordingly
1257 LOG (GNUNET_ERROR_TYPE_DEBUG, "No update of the gossip list.\n");
1259 // TODO independent of that also get some peers from CADET_get_peers()?
1262 /* Update samplers */
1264 for ( i = 0 ; i < push_list_size ; i++ )
1266 RPS_sampler_update_list (&push_list[i]);
1267 // TODO set in_flag?
1270 for ( i = 0 ; i < pull_list_size ; i++ )
1272 RPS_sampler_update_list (&pull_list[i]);
1273 // TODO set in_flag?
1277 /* Empty push/pull lists */
1278 GNUNET_array_grow (push_list, push_list_size, 0);
1279 GNUNET_array_grow (pull_list, pull_list_size, 0);
1281 struct GNUNET_TIME_Relative time_next_round;
1282 struct GNUNET_TIME_Relative half_round_interval;
1283 unsigned int rand_delay;
1285 /* Compute random time value between .5 * round_interval and 1.5 *round_interval */
1286 half_round_interval = GNUNET_TIME_relative_divide (round_interval, 2);
1290 * Compute random value between (0 and 1) * round_interval
1291 * via multiplying round_interval with a 'fraction' (0 to value)/value
1293 rand_delay = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, UINT_MAX/10);
1294 time_next_round = GNUNET_TIME_relative_multiply (round_interval, rand_delay);
1295 time_next_round = GNUNET_TIME_relative_divide (time_next_round, UINT_MAX/10);
1296 time_next_round = GNUNET_TIME_relative_add (time_next_round, half_round_interval);
1297 } while (GNUNET_TIME_UNIT_FOREVER_REL.rel_value_us == time_next_round.rel_value_us);
1299 /* Schedule next round */
1300 do_round_task = GNUNET_SCHEDULER_add_delayed (round_interval, &do_round, NULL);
1301 LOG (GNUNET_ERROR_TYPE_DEBUG, "Finished round\n");
1306 * Open a connection to given peer and store channel and mq.
1309 insertCB (void *cls, const struct GNUNET_PeerIdentity *id)
1311 // We open a channel to be notified when this peer goes down.
1312 (void) get_channel (peer_map, id);
1317 * Close the connection to given peer and delete channel and mq.
1320 removeCB (void *cls, const struct GNUNET_PeerIdentity *id)
1323 struct PeerContext *ctx;
1325 s = RPS_sampler_count_id (id);
1328 if (GNUNET_YES == GNUNET_CONTAINER_multipeermap_contains (peer_map, id))
1330 ctx = GNUNET_CONTAINER_multipeermap_get (peer_map, id);
1331 if (NULL != ctx->send_channel)
1333 if (NULL != ctx->mq)
1335 GNUNET_MQ_destroy (ctx->mq);
1337 // may already be freed at shutdown of cadet
1338 //GNUNET_CADET_channel_destroy (ctx->send_channel);
1340 // TODO cleanup peer
1341 (void) GNUNET_CONTAINER_multipeermap_remove_all (peer_map, id);
1347 rps_start (struct GNUNET_SERVER_Handle *server);
1350 * This is called from GNUNET_CADET_get_peers().
1352 * It is called on every peer(ID) that cadet somehow has contact with.
1353 * We use those to initialise the sampler.
1356 init_peer_cb (void *cls,
1357 const struct GNUNET_PeerIdentity *peer,
1358 int tunnel, // "Do we have a tunnel towards this peer?"
1359 unsigned int n_paths, // "Number of known paths towards this peer"
1360 unsigned int best_path) // "How long is the best path?
1361 // (0 = unknown, 1 = ourselves, 2 = neighbor)"
1363 struct GNUNET_SERVER_Handle *server;
1364 struct PeerOutstandingOp out_op;
1365 struct PeerContext *peer_ctx;
1367 server = (struct GNUNET_SERVER_Handle *) cls;
1370 LOG (GNUNET_ERROR_TYPE_DEBUG,
1371 "Got peer %s (at %p) from CADET (gossip_list_size: %u)\n",
1372 GNUNET_i2s (peer), peer, gossip_list_size);
1374 // maybe create a function for that
1375 peer_ctx = get_peer_ctx (peer_map, peer);
1376 if (GNUNET_NO == insert_in_sampler_scheduled (peer_ctx))
1378 out_op.op = insert_in_sampler;
1379 GNUNET_array_append (peer_ctx->outstanding_ops, peer_ctx->num_outstanding_ops, out_op);
1382 if (GNUNET_NO == insert_in_gossip_list_scheduled (peer_ctx))
1384 out_op.op = insert_in_gossip_list;
1385 out_op.op_cls = NULL;
1386 GNUNET_array_append (peer_ctx->outstanding_ops, peer_ctx->num_outstanding_ops, out_op);
1389 /* Issue livelyness test on peer */
1390 (void) get_channel (peer_map, peer);
1392 // send push/pull to each of those peers?
1400 * Callback used to clean the multipeermap.
1403 peer_remove_cb (void *cls, const struct GNUNET_PeerIdentity *key, void *value)
1405 struct PeerContext *peer_ctx;
1406 const struct GNUNET_CADET_Channel *ch = (const struct GNUNET_CADET_Channel *) cls;
1407 struct GNUNET_CADET_Channel *recv;
1408 struct GNUNET_CADET_Channel *send;
1410 peer_ctx = (struct PeerContext *) value;
1412 if (0 != peer_ctx->num_outstanding_ops)
1413 GNUNET_array_grow (peer_ctx->outstanding_ops, peer_ctx->num_outstanding_ops, 0);
1415 if (NULL != peer_ctx->mq)
1416 GNUNET_MQ_destroy (peer_ctx->mq);
1418 if (NULL != peer_ctx->is_live_task)
1420 GNUNET_CADET_notify_transmit_ready_cancel (peer_ctx->is_live_task);
1421 peer_ctx->is_live_task = NULL;
1424 send = peer_ctx->send_channel;
1425 peer_ctx->send_channel = NULL;
1426 recv = peer_ctx->send_channel;
1427 peer_ctx->recv_channel = NULL;
1432 GNUNET_CADET_channel_destroy (send);
1438 GNUNET_CADET_channel_destroy (recv);
1441 if (GNUNET_NO == GNUNET_CONTAINER_multipeermap_remove_all (peer_map, key))
1442 LOG (GNUNET_ERROR_TYPE_WARNING, "removing peer from peer_map failed\n");
1444 GNUNET_free (peer_ctx);
1451 * Task run during shutdown.
1457 shutdown_task (void *cls,
1458 const struct GNUNET_SCHEDULER_TaskContext *tc)
1460 LOG (GNUNET_ERROR_TYPE_DEBUG, "RPS is going down\n");
1462 if ( NULL != do_round_task )
1464 GNUNET_SCHEDULER_cancel (do_round_task);
1465 do_round_task = NULL;
1470 if (GNUNET_SYSERR == GNUNET_CONTAINER_multipeermap_iterate (peer_map, peer_remove_cb, NULL))
1471 LOG (GNUNET_ERROR_TYPE_WARNING,
1472 "Iterating over peers to disconnect from them was cancelled\n");
1475 GNUNET_NSE_disconnect (nse);
1476 GNUNET_CADET_disconnect (cadet_handle);
1477 RPS_sampler_destroy ();
1478 GNUNET_break (0 == GNUNET_CONTAINER_multipeermap_size (peer_map));
1479 GNUNET_CONTAINER_multipeermap_destroy (peer_map);
1480 GNUNET_array_grow (gossip_list, gossip_list_size, 0);
1481 GNUNET_array_grow (push_list, push_list_size, 0);
1482 GNUNET_array_grow (pull_list, pull_list_size, 0);
1487 * A client disconnected. Remove all of its data structure entries.
1489 * @param cls closure, NULL
1490 * @param client identification of the client
1493 handle_client_disconnect (void *cls,
1494 struct GNUNET_SERVER_Client * client)
1500 * Handle the channel a peer opens to us.
1502 * @param cls The closure
1503 * @param channel The channel the peer wants to establish
1504 * @param initiator The peer's peer ID
1505 * @param port The port the channel is being established over
1506 * @param options Further options
1509 handle_inbound_channel (void *cls,
1510 struct GNUNET_CADET_Channel *channel,
1511 const struct GNUNET_PeerIdentity *initiator,
1513 enum GNUNET_CADET_ChannelOption options)
1515 struct PeerContext *ctx;
1517 LOG (GNUNET_ERROR_TYPE_DEBUG,
1518 "New channel was established to us (Peer %s).\n",
1519 GNUNET_i2s (initiator));
1521 GNUNET_assert (NULL != channel);
1523 // we might not even store the recv_channel
1525 ctx = get_peer_ctx (peer_map, initiator);
1526 if (NULL != ctx->recv_channel)
1528 ctx->recv_channel = channel;
1531 ctx->peer_flags |= LIVING;
1533 //ctx->peer_flags = IN_OTHER_GOSSIP_LIST;
1536 (void) GNUNET_CONTAINER_multipeermap_put (peer_map, initiator, ctx,
1537 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
1539 return NULL; // TODO
1544 * This is called when a remote peer destroys a channel.
1546 * @param cls The closure
1547 * @param channel The channel being closed
1548 * @param channel_ctx The context associated with this channel
1551 cleanup_channel (void *cls,
1552 const struct GNUNET_CADET_Channel *channel,
1555 struct GNUNET_PeerIdentity *peer;
1556 struct PeerContext *peer_ctx;
1558 peer = (struct GNUNET_PeerIdentity *) GNUNET_CADET_channel_get_info (
1559 (struct GNUNET_CADET_Channel *) channel, GNUNET_CADET_OPTION_PEER);
1560 // Guess simply casting isn't the nicest way...
1561 // FIXME wait for cadet to change this function
1562 LOG (GNUNET_ERROR_TYPE_DEBUG, "Cleaning up channel to peer %s\n",
1565 RPS_sampler_reinitialise_by_value (peer);
1567 if (GNUNET_YES == GNUNET_CONTAINER_multipeermap_contains (peer_map, peer))
1569 peer_ctx = GNUNET_CONTAINER_multipeermap_get (peer_map, peer);
1571 if (NULL == peer_ctx) /* It could have been removed by shutdown_task */
1574 /* Somwewhat {ab,re}use the iterator function */
1575 /* Cast to void is ok, because it's used as void in peer_remove_cb */
1576 (void) peer_remove_cb ((void *) channel, peer, peer_ctx);
1582 * Actually start the service.
1585 rps_start (struct GNUNET_SERVER_Handle *server)
1587 static const struct GNUNET_SERVER_MessageHandler handlers[] = {
1588 {&handle_client_request, NULL, GNUNET_MESSAGE_TYPE_RPS_CS_REQUEST,
1589 sizeof (struct GNUNET_RPS_CS_RequestMessage)},
1590 {&handle_client_seed, NULL, GNUNET_MESSAGE_TYPE_RPS_CS_SEED, 0},
1594 GNUNET_SERVER_add_handlers (server, handlers);
1595 GNUNET_SERVER_disconnect_notify (server,
1596 &handle_client_disconnect,
1598 LOG (GNUNET_ERROR_TYPE_DEBUG, "Ready to receive requests from clients\n");
1601 num_hist_update_tasks = 0;
1603 do_round_task = GNUNET_SCHEDULER_add_now (&do_round, NULL);
1604 LOG (GNUNET_ERROR_TYPE_DEBUG, "Scheduled first round\n");
1606 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
1613 * Process statistics requests.
1615 * @param cls closure
1616 * @param server the initialized server
1617 * @param c configuration to use
1621 struct GNUNET_SERVER_Handle *server,
1622 const struct GNUNET_CONFIGURATION_Handle *c)
1624 // TODO check what this does -- copied from gnunet-boss
1625 // - seems to work as expected
1626 GNUNET_log_setup ("rps", GNUNET_error_type_to_string (GNUNET_ERROR_TYPE_DEBUG), NULL);
1631 GNUNET_CRYPTO_get_peer_identity (cfg, &own_identity); // TODO check return value
1632 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1633 "STARTING SERVICE (rps) for peer [%s]\n",
1634 GNUNET_i2s (&own_identity));
1637 /* Get time interval from the configuration */
1638 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_time (cfg, "RPS",
1642 LOG (GNUNET_ERROR_TYPE_DEBUG, "Failed to read ROUNDINTERVAL from config\n");
1643 GNUNET_SCHEDULER_shutdown ();
1647 /* Get initial size of sampler/gossip list from the configuration */
1648 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_number (cfg, "RPS",
1650 (long long unsigned int *) &sampler_size_est_need))
1652 LOG (GNUNET_ERROR_TYPE_DEBUG, "Failed to read INITSIZE from config\n");
1653 GNUNET_SCHEDULER_shutdown ();
1656 LOG (GNUNET_ERROR_TYPE_DEBUG, "INITSIZE is %" PRIu64 "\n", sampler_size_est_need);
1662 /* connect to NSE */
1663 nse = GNUNET_NSE_connect (cfg, nse_callback, NULL);
1664 // TODO check whether that was successful
1665 LOG (GNUNET_ERROR_TYPE_DEBUG, "Connected to NSE\n");
1671 peer_map = GNUNET_CONTAINER_multipeermap_create (sampler_size_est_need, GNUNET_NO);
1674 /* Initialise cadet */
1675 static const struct GNUNET_CADET_MessageHandler cadet_handlers[] = {
1676 {&handle_peer_push , GNUNET_MESSAGE_TYPE_RPS_PP_PUSH ,
1677 sizeof (struct GNUNET_MessageHeader)},
1678 {&handle_peer_pull_request, GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REQUEST,
1679 sizeof (struct GNUNET_MessageHeader)},
1680 {&handle_peer_pull_reply , GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REPLY , 0},
1684 const uint32_t ports[] = {GNUNET_RPS_CADET_PORT, 0}; // _PORT specified in src/rps/rps.h
1685 cadet_handle = GNUNET_CADET_connect (cfg,
1687 &handle_inbound_channel,
1691 LOG (GNUNET_ERROR_TYPE_DEBUG, "Connected to CADET\n");
1694 /* Initialise sampler */
1695 struct GNUNET_TIME_Relative half_round_interval;
1696 struct GNUNET_TIME_Relative max_round_interval;
1698 half_round_interval = GNUNET_TIME_relative_multiply (round_interval, .5);
1699 max_round_interval = GNUNET_TIME_relative_add (round_interval, half_round_interval);
1701 RPS_sampler_init (sampler_size_est_need, max_round_interval,
1702 insertCB, NULL, removeCB, NULL);
1704 /* Initialise push and pull maps */
1709 pending_pull_reply_list = NULL;
1710 pending_pull_reply_list_size = 0;
1713 LOG (GNUNET_ERROR_TYPE_DEBUG, "Requesting peers from CADET\n");
1714 GNUNET_CADET_get_peers (cadet_handle, &init_peer_cb, server);
1716 // TODO send push/pull to each of those peers?
1721 * The main function for the rps service.
1723 * @param argc number of arguments from the command line
1724 * @param argv command line arguments
1725 * @return 0 ok, 1 on error
1728 main (int argc, char *const *argv)
1730 return (GNUNET_OK ==
1731 GNUNET_SERVICE_run (argc,
1734 GNUNET_SERVICE_OPTION_NONE,
1735 &run, NULL)) ? 0 : 1;
1738 /* end of gnunet-service-rps.c */