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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 ***********************************************************************/
192 /***********************************************************************
194 ***********************************************************************/
197 * Sampler used for the Brahms protocol itself.
199 static struct RPS_Sampler *prot_sampler;
202 * Sampler used for the clients.
204 static struct RPS_Sampler *client_sampler;
207 * Set of all peers to keep track of them.
209 static struct GNUNET_CONTAINER_MultiPeerMap *peer_map;
213 * The gossiped list of peers.
215 static struct GNUNET_PeerIdentity *gossip_list;
218 * Size of the gossiped list
220 //static unsigned int gossip_list_size;
221 static uint32_t gossip_list_size;
225 * The size of sampler we need to be able to satisfy the client's need of
228 static unsigned int sampler_size_client_need;
231 * The size of sampler we need to be able to satisfy the Brahms protocol's
232 * need of random peers.
234 * This is directly taken as the #gossip_list_size on update of the
237 * This is one minimum size the sampler grows to.
239 static unsigned int sampler_size_est_need;
243 * Percentage of total peer number in the gossip list
244 * to send random PUSHes to
249 * Percentage of total peer number in the gossip list
250 * to send random PULLs to
255 * The percentage gamma of history updates.
256 * Simply 1 - alpha - beta
261 * Identifier for the main task that runs periodically.
263 static struct GNUNET_SCHEDULER_Task *do_round_task;
266 * Time inverval the do_round task runs in.
268 static struct GNUNET_TIME_Relative round_interval;
273 * List to store peers received through pushes temporary.
275 * TODO -> multipeermap
277 static struct GNUNET_PeerIdentity *push_list;
280 * Size of the push_list;
282 static unsigned int push_list_size;
283 //size_t push_list_size;
286 * List to store peers received through pulls temporary.
288 * TODO -> multipeermap
290 static struct GNUNET_PeerIdentity *pull_list;
293 * Size of the pull_list;
295 static unsigned int pull_list_size;
296 //size_t pull_list_size;
302 static struct GNUNET_NSE_Handle *nse;
307 static struct GNUNET_CADET_Handle *cadet_handle;
313 * Only needed in the beginning to check how many of the 64 deltas
316 static unsigned int req_counter;
319 * Time of the last request we received.
321 * Used to compute the expected request rate.
323 static struct GNUNET_TIME_Absolute last_request;
326 * Size of #request_deltas.
328 #define REQUEST_DELTAS_SIZE 64
329 static unsigned int request_deltas_size = REQUEST_DELTAS_SIZE;
332 * Last 64 deltas between requests
334 static struct GNUNET_TIME_Relative request_deltas[REQUEST_DELTAS_SIZE];
337 * The prediction of the rate of requests
339 static struct GNUNET_TIME_Relative request_rate;
343 * List with the peers we sent requests to.
345 struct GNUNET_PeerIdentity *pending_pull_reply_list;
348 * Size of #pending_pull_reply_list.
350 uint32_t pending_pull_reply_list_size;
354 * Number of history update tasks.
356 uint32_t num_hist_update_tasks;
359 /***********************************************************************
361 ***********************************************************************/
368 /***********************************************************************
370 ***********************************************************************/
373 * Set a peer flag of given peer context.
375 #define set_peer_flag(peer_ctx, mask) (peer_ctx->peer_flags |= mask)
378 * Get peer flag of given peer context.
380 #define get_peer_flag(peer_ctx, mask) (peer_ctx->peer_flags & mask ? GNUNET_YES : GNUNET_NO)
383 * Unset flag of given peer context.
385 #define unset_peer_flag(peer_ctx, mask) (peer_ctx->peer_flags &= (~mask))
389 * Clean the send channel of a peer
392 peer_clean (const struct GNUNET_PeerIdentity *peer);
396 * Check if peer is already in peer array.
399 in_arr (const struct GNUNET_PeerIdentity *array,
400 unsigned int arr_size,
401 const struct GNUNET_PeerIdentity *peer)
403 GNUNET_assert (NULL != peer);
408 GNUNET_assert (NULL != array);
412 for (i = 0; i < arr_size ; i++)
413 if (0 == GNUNET_CRYPTO_cmp_peer_identity (&array[i], peer))
420 * Print peerlist to log.
423 print_peer_list (struct GNUNET_PeerIdentity *list, unsigned int len)
427 LOG (GNUNET_ERROR_TYPE_DEBUG,
428 "Printing peer list of length %u at %p:\n",
431 for (i = 0 ; i < len ; i++)
433 LOG (GNUNET_ERROR_TYPE_DEBUG,
435 i, GNUNET_i2s (&list[i]));
441 * Remove peer from list.
444 rem_from_list (struct GNUNET_PeerIdentity **peer_list,
445 unsigned int *list_size,
446 const struct GNUNET_PeerIdentity *peer)
449 struct GNUNET_PeerIdentity *tmp;
453 LOG (GNUNET_ERROR_TYPE_DEBUG,
454 "Removing peer %s from list at %p\n",
457 print_peer_list (tmp, *list_size);
459 for ( i = 0 ; i < *list_size ; i++ )
461 if (0 == GNUNET_CRYPTO_cmp_peer_identity (&tmp[i], peer))
463 if (i < *list_size -1)
464 { /* Not at the last entry -- shift peers left */
465 memcpy (&tmp[i], &tmp[i +1],
466 ((*list_size) - i -1) * sizeof (struct GNUNET_PeerIdentity));
468 /* Remove last entry (should be now useless PeerID) */
469 GNUNET_array_grow (tmp, *list_size, (*list_size) -1);
476 * Get random peer from the given list but don't return one from the @a ignore_list.
478 struct GNUNET_PeerIdentity *
479 get_rand_peer_ignore_list (const struct GNUNET_PeerIdentity *peer_list,
481 const struct GNUNET_PeerIdentity *ignore_list,
482 uint32_t ignore_size)
486 struct GNUNET_PeerIdentity *tmp_peer_list;
487 struct GNUNET_PeerIdentity *peer;
489 GNUNET_assert (NULL != peer_list);
494 tmp_peer_list = NULL;
495 GNUNET_array_grow (tmp_peer_list, tmp_size, list_size);
496 memcpy (tmp_peer_list,
498 list_size * sizeof (struct GNUNET_PeerIdentity));
499 peer = GNUNET_new (struct GNUNET_PeerIdentity);
502 * Choose the r_index of the peer we want to return
503 * at random from the interval of the gossip list
505 r_index = GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_STRONG,
507 *peer = tmp_peer_list[r_index];
509 while (in_arr (ignore_list, ignore_size, peer))
511 rem_from_list (&tmp_peer_list, &tmp_size, peer);
513 print_peer_list (tmp_peer_list, tmp_size);
522 * Choose the r_index of the peer we want to return
523 * at random from the interval of the gossip list
525 r_index = GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_STRONG,
527 *peer = tmp_peer_list[r_index];
531 GNUNET_array_grow (tmp_peer_list, tmp_size, 0);
538 * Get the context of a peer. If not existing, create.
541 get_peer_ctx (struct GNUNET_CONTAINER_MultiPeerMap *peer_map,
542 const struct GNUNET_PeerIdentity *peer)
544 struct PeerContext *ctx;
546 if ( GNUNET_YES == GNUNET_CONTAINER_multipeermap_contains (peer_map, peer))
548 ctx = GNUNET_CONTAINER_multipeermap_get (peer_map, peer);
552 ctx = GNUNET_new (struct PeerContext);
555 ctx->send_channel = NULL;
556 ctx->recv_channel = NULL;
557 ctx->outstanding_ops = NULL;
558 ctx->num_outstanding_ops = 0;
559 (void) GNUNET_CONTAINER_multipeermap_put (peer_map, peer, ctx,
560 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
567 * Put random peer from sampler into the gossip list as history update.
570 hist_update (void *cls, struct GNUNET_PeerIdentity *ids, uint32_t num_peers)
572 GNUNET_assert (1 == num_peers);
574 if (gossip_list_size < sampler_size_est_need)
575 GNUNET_array_append (gossip_list, gossip_list_size, *ids);
577 if (0 < num_hist_update_tasks)
578 num_hist_update_tasks--;
583 * Set the peer flag to living and call the outstanding operations on this peer.
586 peer_is_live (struct PeerContext *peer_ctx)
588 struct GNUNET_PeerIdentity *peer;
590 peer = &peer_ctx->peer_id;
591 set_peer_flag (peer_ctx, VALID);
593 LOG (GNUNET_ERROR_TYPE_DEBUG, "Peer %s is live\n", GNUNET_i2s (peer));
595 if (0 != peer_ctx->num_outstanding_ops)
596 { /* Call outstanding operations */
599 for ( i = 0 ; i < peer_ctx->num_outstanding_ops ; i++ )
600 peer_ctx->outstanding_ops[i].op (peer_ctx->outstanding_ops[i].op_cls, peer);
601 GNUNET_array_grow (peer_ctx->outstanding_ops, peer_ctx->num_outstanding_ops, 0);
609 * Callback that is called when a channel was effectively established.
610 * This is given to ntfy_tmt_rdy and called when the channel was
611 * successfully established.
614 cadet_ntfy_tmt_rdy_cb (void *cls, size_t size, void *buf)
616 struct PeerContext *peer_ctx = (struct PeerContext *) cls;
620 peer_is_live (peer_ctx);
622 //if (NULL != peer_ctx->is_live_task)
624 // LOG (GNUNET_ERROR_TYPE_DEBUG,
625 // "Trying to cancle is_live_task for peer %s\n",
626 // GNUNET_i2s (&peer_ctx->peer_id));
627 // GNUNET_CADET_notify_transmit_ready_cancel (peer_ctx->is_live_task);
628 // peer_ctx->is_live_task = NULL;
630 peer_ctx->is_live_task = NULL;
637 * Get the channel of a peer. If not existing, create.
639 struct GNUNET_CADET_Channel *
640 get_channel (struct GNUNET_CONTAINER_MultiPeerMap *peer_map,
641 const struct GNUNET_PeerIdentity *peer)
643 struct PeerContext *ctx;
645 LOG (GNUNET_ERROR_TYPE_DEBUG,
646 "Trying to establish channel to peer %s\n",
649 ctx = get_peer_ctx (peer_map, peer);
650 if (NULL == ctx->send_channel)
652 ctx->send_channel = GNUNET_CADET_channel_create (cadet_handle,
655 GNUNET_RPS_CADET_PORT,
656 GNUNET_CADET_OPTION_RELIABLE);
658 /* If we don't know whether peer is live,
659 * get notified when we know it is live. */
660 if (GNUNET_YES != get_peer_flag (ctx, VALID)
661 && NULL == ctx->recv_channel
662 && NULL == ctx->is_live_task)
664 ctx->peer_id = *peer;
665 LOG (GNUNET_ERROR_TYPE_DEBUG,
666 "Get informed about peer %s getting live\n",
669 GNUNET_CADET_notify_transmit_ready (ctx->send_channel,
671 GNUNET_TIME_UNIT_FOREVER_REL,
672 sizeof (struct GNUNET_MessageHeader),
673 cadet_ntfy_tmt_rdy_cb,
676 // FIXME check whether this is NULL
678 // do I have to explicitly put it in the peer_map?
679 (void) GNUNET_CONTAINER_multipeermap_put
683 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
685 return ctx->send_channel;
690 * Get the message queue of a specific peer.
692 * If we already have a message queue open to this client,
693 * simply return it, otherways create one.
695 struct GNUNET_MQ_Handle *
696 get_mq (struct GNUNET_CONTAINER_MultiPeerMap *peer_map,
697 const struct GNUNET_PeerIdentity *peer_id)
699 struct PeerContext *peer_ctx;
701 peer_ctx = get_peer_ctx (peer_map, peer_id);
703 GNUNET_assert (NULL == peer_ctx->is_live_task);
705 if (NULL == peer_ctx->mq)
707 (void) get_channel (peer_map, peer_id);
708 peer_ctx->mq = GNUNET_CADET_mq_create (peer_ctx->send_channel);
709 //do I have to explicitly put it in the peer_map?
710 (void) GNUNET_CONTAINER_multipeermap_put (peer_map, peer_id, peer_ctx,
711 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
718 * Sum all time relatives of an array.
720 struct GNUNET_TIME_Relative
721 T_relative_sum (const struct GNUNET_TIME_Relative *rel_array, uint32_t arr_size)
723 struct GNUNET_TIME_Relative sum;
726 sum = GNUNET_TIME_UNIT_ZERO;
727 for ( i = 0 ; i < arr_size ; i++ )
729 sum = GNUNET_TIME_relative_add (sum, rel_array[i]);
736 * Compute the average of given time relatives.
738 struct GNUNET_TIME_Relative
739 T_relative_avg (const struct GNUNET_TIME_Relative *rel_array, uint32_t arr_size)
741 return GNUNET_TIME_relative_divide (T_relative_sum (rel_array, arr_size), arr_size);
746 * Insert PeerID in #pull_list
748 * Called once we know a peer is live.
751 insert_in_pull_list (void *cls, const struct GNUNET_PeerIdentity *peer)
753 if (GNUNET_NO == in_arr (pull_list, pull_list_size, peer))
754 GNUNET_array_append (pull_list, pull_list_size, *peer);
760 * Check whether #insert_in_pull_list was already scheduled
763 insert_in_pull_list_scheduled (const struct PeerContext *peer_ctx)
767 for ( i = 0 ; i < peer_ctx->num_outstanding_ops ; i++ )
768 if (insert_in_pull_list == peer_ctx->outstanding_ops[i].op)
775 * Insert PeerID in #gossip_list
777 * Called once we know a peer is live.
780 insert_in_gossip_list (void *cls, const struct GNUNET_PeerIdentity *peer)
782 if (GNUNET_NO == in_arr (gossip_list, gossip_list_size, peer))
783 GNUNET_array_append (gossip_list, gossip_list_size, *peer);
785 (void) get_channel (peer_map, peer);
789 * Check whether #insert_in_gossip_list was already scheduled
792 insert_in_gossip_list_scheduled (const struct PeerContext *peer_ctx)
796 for ( i = 0 ; i < peer_ctx->num_outstanding_ops ; i++ )
797 if (insert_in_gossip_list == peer_ctx->outstanding_ops[i].op)
804 * Update sampler with given PeerID.
807 insert_in_sampler (void *cls, const struct GNUNET_PeerIdentity *peer)
809 RPS_sampler_update (prot_sampler, peer);
810 RPS_sampler_update (client_sampler, peer);
815 * Check whether #insert_in_sampler was already scheduled
818 insert_in_sampler_scheduled (const struct PeerContext *peer_ctx)
822 for ( i = 0 ; i < peer_ctx->num_outstanding_ops ; i++ )
823 if (insert_in_sampler== peer_ctx->outstanding_ops[i].op)
830 * Wrapper around #RPS_sampler_resize()
832 * If we do not have enough sampler elements, double current sampler size
833 * If we have more than enough sampler elements, halv current sampler size
836 resize_wrapper (struct RPS_Sampler *sampler, uint32_t new_size)
838 unsigned int sampler_size;
841 // TODO respect the min, max
842 sampler_size = RPS_sampler_get_size (sampler);
843 if (sampler_size > new_size * 4)
845 RPS_sampler_resize (sampler, sampler_size / 2);
847 else if (sampler_size < new_size)
849 RPS_sampler_resize (sampler, sampler_size * 2);
851 LOG (GNUNET_ERROR_TYPE_DEBUG, "sampler_size is now %u\n", sampler_size);
856 * Wrapper around #RPS_sampler_resize() resizing the client sampler
859 client_resize_wrapper ()
861 uint32_t bigger_size;
862 unsigned int sampler_size;
866 sampler_size = RPS_sampler_get_size (client_sampler);
868 if (sampler_size_est_need > sampler_size_client_need)
869 bigger_size = sampler_size_est_need;
871 bigger_size = sampler_size_client_need;
873 // TODO respect the min, max
874 resize_wrapper (client_sampler, bigger_size);
875 LOG (GNUNET_ERROR_TYPE_DEBUG, "sampler_size is now %u\n", sampler_size);
880 * Estimate request rate
882 * Called every time we receive a request from the client.
887 struct GNUNET_TIME_Relative max_round_duration;
889 if (request_deltas_size > req_counter)
891 if ( 1 < req_counter)
893 /* Shift last request deltas to the right */
894 memcpy (&request_deltas[1],
896 (req_counter - 1) * sizeof (struct GNUNET_TIME_Relative));
898 /* Add current delta to beginning */
900 GNUNET_TIME_absolute_get_difference (last_request,
901 GNUNET_TIME_absolute_get ());
902 request_rate = T_relative_avg (request_deltas, req_counter);
904 /* Compute the duration a round will maximally take */
906 GNUNET_TIME_relative_add (round_interval,
907 GNUNET_TIME_relative_divide (round_interval, 2));
909 /* Set the estimated size the sampler has to have to
910 * satisfy the current client request rate */
911 sampler_size_client_need =
912 max_round_duration.rel_value_us / request_rate.rel_value_us;
914 /* Resize the sampler */
915 client_resize_wrapper ();
917 last_request = GNUNET_TIME_absolute_get ();
921 /***********************************************************************
923 ***********************************************************************/
930 * Function called by NSE.
932 * Updates sizes of sampler list and gossip list and adapt those lists
936 nse_callback (void *cls, struct GNUNET_TIME_Absolute timestamp,
937 double logestimate, double std_dev)
940 //double scale; // TODO this might go gloabal/config
942 LOG (GNUNET_ERROR_TYPE_DEBUG,
943 "Received a ns estimate - logest: %f, std_dev: %f (old_size: %u)\n",
944 logestimate, std_dev, RPS_sampler_get_size (prot_sampler));
946 estimate = GNUNET_NSE_log_estimate_to_n (logestimate);
947 // GNUNET_NSE_log_estimate_to_n (logestimate);
948 estimate = pow (estimate, 1.0 / 3);
949 // TODO add if std_dev is a number
950 // estimate += (std_dev * scale);
951 if (2 < ceil (estimate))
953 LOG (GNUNET_ERROR_TYPE_DEBUG, "Changing estimate to %f\n", estimate);
954 sampler_size_est_need = estimate;
956 LOG (GNUNET_ERROR_TYPE_DEBUG, "Not using estimate %f\n", estimate);
958 /* If the NSE has changed adapt the lists accordingly */
959 resize_wrapper (prot_sampler, sampler_size_est_need);
960 client_resize_wrapper ();
965 * Callback called once the requested PeerIDs are ready.
967 * Sends those to the requesting client.
969 void client_respond (void *cls,
970 struct GNUNET_PeerIdentity *ids, uint32_t num_peers)
972 LOG (GNUNET_ERROR_TYPE_DEBUG, "sampler returned %" PRIX32 " peers\n", num_peers);
973 struct GNUNET_MQ_Envelope *ev;
974 struct GNUNET_RPS_CS_ReplyMessage *out_msg;
975 struct GNUNET_SERVER_Client *client;
976 uint32_t size_needed;
977 struct client_ctx *cli_ctx;
979 client = (struct GNUNET_SERVER_Client *) cls;
981 size_needed = sizeof (struct GNUNET_RPS_CS_ReplyMessage) +
982 num_peers * sizeof (struct GNUNET_PeerIdentity);
984 GNUNET_assert (GNUNET_SERVER_MAX_MESSAGE_SIZE >= size_needed);
986 ev = GNUNET_MQ_msg_extra (out_msg,
987 num_peers * sizeof (struct GNUNET_PeerIdentity),
988 GNUNET_MESSAGE_TYPE_RPS_CS_REPLY);
989 out_msg->num_peers = htonl (num_peers);
993 num_peers * sizeof (struct GNUNET_PeerIdentity));
996 cli_ctx = GNUNET_SERVER_client_get_user_context (client, struct client_ctx);
997 if ( NULL == cli_ctx ) {
998 cli_ctx = GNUNET_new (struct client_ctx);
999 cli_ctx->mq = GNUNET_MQ_queue_for_server_client (client);
1000 GNUNET_SERVER_client_set_user_context (client, cli_ctx);
1003 GNUNET_MQ_send (cli_ctx->mq, ev);
1008 * Handle RPS request from the client.
1010 * @param cls closure
1011 * @param client identification of the client
1012 * @param message the actual message
1015 handle_client_request (void *cls,
1016 struct GNUNET_SERVER_Client *client,
1017 const struct GNUNET_MessageHeader *message)
1019 struct GNUNET_RPS_CS_RequestMessage *msg;
1021 uint32_t size_needed;
1024 msg = (struct GNUNET_RPS_CS_RequestMessage *) message;
1026 num_peers = ntohl (msg->num_peers);
1027 size_needed = sizeof (struct GNUNET_RPS_CS_ReplyMessage) +
1028 num_peers * sizeof (struct GNUNET_PeerIdentity);
1030 if (GNUNET_SERVER_MAX_MESSAGE_SIZE < size_needed)
1032 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
1036 for (i = 0 ; i < num_peers ; i++)
1039 LOG (GNUNET_ERROR_TYPE_DEBUG, "Client requested %" PRIX32 " random peer(s).\n", num_peers);
1041 RPS_sampler_get_n_rand_peers (client_sampler, client_respond,
1042 client, num_peers, GNUNET_YES);
1044 GNUNET_SERVER_receive_done (client,
1050 * Handle seed from the client.
1052 * @param cls closure
1053 * @param client identification of the client
1054 * @param message the actual message
1057 handle_client_seed (void *cls,
1058 struct GNUNET_SERVER_Client *client,
1059 const struct GNUNET_MessageHeader *message)
1061 struct GNUNET_RPS_CS_SeedMessage *in_msg;
1062 struct GNUNET_PeerIdentity *peers;
1065 if (sizeof (struct GNUNET_RPS_CS_SeedMessage) < ntohs (message->size))
1067 GNUNET_break_op (0);
1068 GNUNET_SERVER_receive_done (client,
1071 in_msg = (struct GNUNET_RPS_CS_SeedMessage *) message;
1072 if ((ntohs (message->size) - sizeof (struct GNUNET_RPS_CS_SeedMessage)) /
1073 sizeof (struct GNUNET_PeerIdentity) != ntohl (in_msg->num_peers))
1075 GNUNET_break_op (0);
1076 GNUNET_SERVER_receive_done (client,
1080 in_msg = (struct GNUNET_RPS_CS_SeedMessage *) message;
1081 peers = (struct GNUNET_PeerIdentity *) &message[1];
1083 for ( i = 0 ; i < ntohl (in_msg->num_peers) ; i++ )
1084 RPS_sampler_update (prot_sampler, &peers[i]);
1085 RPS_sampler_update (client_sampler, &peers[i]);
1087 GNUNET_SERVER_receive_done (client,
1093 * Handle a PUSH message from another peer.
1095 * Check the proof of work and store the PeerID
1096 * in the temporary list for pushed PeerIDs.
1098 * @param cls Closure
1099 * @param channel The channel the PUSH was received over
1100 * @param channel_ctx The context associated with this channel
1101 * @param msg The message header
1104 handle_peer_push (void *cls,
1105 struct GNUNET_CADET_Channel *channel,
1107 const struct GNUNET_MessageHeader *msg)
1109 const struct GNUNET_PeerIdentity *peer;
1111 // (check the proof of work)
1113 peer = (const struct GNUNET_PeerIdentity *) GNUNET_CADET_channel_get_info (channel, GNUNET_CADET_OPTION_PEER);
1114 // FIXME wait for cadet to change this function
1115 LOG (GNUNET_ERROR_TYPE_DEBUG, "PUSH received (%s)\n", GNUNET_i2s (peer));
1117 /* Add the sending peer to the push_list */
1118 if (GNUNET_NO == in_arr (push_list, push_list_size, peer))
1119 GNUNET_array_append (push_list, push_list_size, *peer);
1125 * Handle PULL REQUEST request message from another peer.
1127 * Reply with the gossip list of PeerIDs.
1129 * @param cls Closure
1130 * @param channel The channel the PUSH was received over
1131 * @param channel_ctx The context associated with this channel
1132 * @param msg The message header
1135 handle_peer_pull_request (void *cls,
1136 struct GNUNET_CADET_Channel *channel,
1138 const struct GNUNET_MessageHeader *msg)
1140 struct GNUNET_PeerIdentity *peer;
1142 struct GNUNET_MQ_Handle *mq;
1143 struct GNUNET_MQ_Envelope *ev;
1144 struct GNUNET_RPS_P2P_PullReplyMessage *out_msg;
1147 peer = (struct GNUNET_PeerIdentity *) GNUNET_CADET_channel_get_info (channel,
1148 GNUNET_CADET_OPTION_PEER);
1149 // FIXME wait for cadet to change this function
1151 /* Compute actual size */
1152 send_size = sizeof (struct GNUNET_RPS_P2P_PullReplyMessage) +
1153 gossip_list_size * sizeof (struct GNUNET_PeerIdentity);
1155 if (GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE < send_size)
1156 /* Compute number of peers to send
1157 * If too long, simply truncate */
1159 (GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE -
1160 sizeof (struct GNUNET_RPS_P2P_PullReplyMessage)) /
1161 sizeof (struct GNUNET_PeerIdentity);
1163 send_size = gossip_list_size;
1165 LOG (GNUNET_ERROR_TYPE_DEBUG,
1166 "PULL REQUEST from peer %s received, going to send %u peers\n",
1167 GNUNET_i2s (peer), send_size);
1169 mq = get_mq (peer_map, peer);
1171 ev = GNUNET_MQ_msg_extra (out_msg,
1172 send_size * sizeof (struct GNUNET_PeerIdentity),
1173 GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REPLY);
1174 //out_msg->num_peers = htonl (gossip_list_size);
1175 out_msg->num_peers = htonl (send_size);
1176 memcpy (&out_msg[1], gossip_list,
1177 send_size * sizeof (struct GNUNET_PeerIdentity));
1179 GNUNET_MQ_send (mq, ev);
1185 * Handle PULL REPLY message from another peer.
1187 * Check whether we sent a corresponding request and
1188 * whether this reply is the first one.
1190 * @param cls Closure
1191 * @param channel The channel the PUSH was received over
1192 * @param channel_ctx The context associated with this channel
1193 * @param msg The message header
1196 handle_peer_pull_reply (void *cls,
1197 struct GNUNET_CADET_Channel *channel,
1199 const struct GNUNET_MessageHeader *msg)
1201 LOG (GNUNET_ERROR_TYPE_DEBUG, "PULL REPLY received\n");
1203 struct GNUNET_RPS_P2P_PullReplyMessage *in_msg;
1204 struct GNUNET_PeerIdentity *peers;
1205 struct PeerContext *peer_ctx;
1206 struct GNUNET_PeerIdentity *sender;
1207 struct PeerContext *sender_ctx;
1208 struct PeerOutstandingOp out_op;
1211 /* Check for protocol violation */
1212 if (sizeof (struct GNUNET_RPS_P2P_PullReplyMessage) > ntohs (msg->size))
1214 GNUNET_break_op (0);
1215 return GNUNET_SYSERR;
1217 in_msg = (struct GNUNET_RPS_P2P_PullReplyMessage *) msg;
1218 if ((ntohs (msg->size) - sizeof (struct GNUNET_RPS_P2P_PullReplyMessage)) /
1219 sizeof (struct GNUNET_PeerIdentity) != ntohl (in_msg->num_peers))
1221 LOG (GNUNET_ERROR_TYPE_ERROR,
1222 "message says it sends %" PRIu64 " peers, have space for %i peers\n",
1223 ntohl (in_msg->num_peers),
1224 (ntohs (msg->size) - sizeof (struct GNUNET_RPS_P2P_PullReplyMessage)) /
1225 sizeof (struct GNUNET_PeerIdentity));
1226 GNUNET_break_op (0);
1227 return GNUNET_SYSERR;
1230 sender = (struct GNUNET_PeerIdentity *) GNUNET_CADET_channel_get_info (
1231 (struct GNUNET_CADET_Channel *) channel, GNUNET_CADET_OPTION_PEER);
1232 // Guess simply casting isn't the nicest way...
1233 // FIXME wait for cadet to change this function
1234 sender_ctx = get_peer_ctx (peer_map, sender);
1236 if (GNUNET_YES == get_peer_flag (sender_ctx, PULL_REPLY_PENDING))
1238 GNUNET_break_op (0);
1242 /* Do actual logic */
1243 peers = (struct GNUNET_PeerIdentity *) &msg[1];
1244 for (i = 0 ; i < ntohl (in_msg->num_peers) ; i++)
1246 peer_ctx = get_peer_ctx (peer_map, &peers[i]);
1247 if (GNUNET_YES == get_peer_flag (peer_ctx, VALID)
1248 || NULL != peer_ctx->send_channel
1249 || NULL != peer_ctx->recv_channel)
1251 if (GNUNET_NO == in_arr (pull_list, pull_list_size, &peers[i])
1252 && GNUNET_CRYPTO_cmp_peer_identity (&own_identity, &peers[i]))
1253 GNUNET_array_append (pull_list, pull_list_size, peers[i]);
1255 else if (GNUNET_NO == insert_in_pull_list_scheduled (peer_ctx))
1257 out_op.op = insert_in_pull_list;
1258 out_op.op_cls = NULL;
1259 GNUNET_array_append (peer_ctx->outstanding_ops,
1260 peer_ctx->num_outstanding_ops,
1265 unset_peer_flag (sender_ctx, PULL_REPLY_PENDING);
1266 rem_from_list (&pending_pull_reply_list, &pending_pull_reply_list_size, sender);
1273 * Send out PUSHes and PULLs.
1275 * This is executed regylary.
1278 do_round (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1280 LOG (GNUNET_ERROR_TYPE_DEBUG, "Going to execute next round\n");
1283 unsigned int *permut;
1284 unsigned int n_peers; /* Number of peers we send pushes/pulls to */
1285 struct GNUNET_MQ_Envelope *ev;
1286 struct GNUNET_PeerIdentity peer;
1287 struct GNUNET_PeerIdentity *tmp_peer;
1288 struct GNUNET_MQ_Handle *mq;
1290 LOG (GNUNET_ERROR_TYPE_DEBUG,
1291 "Printing gossip list:\n");
1292 for (i = 0 ; i < gossip_list_size ; i++)
1293 LOG (GNUNET_ERROR_TYPE_DEBUG,
1294 "\t%s\n", GNUNET_i2s (&gossip_list[i]));
1295 // TODO log lists, ...
1297 /* Would it make sense to have one shuffeled gossip list and then
1298 * to send PUSHes to first alpha peers, PULL requests to next beta peers and
1299 * use the rest to update sampler?
1300 * in essence get random peers with consumption */
1303 if (0 < gossip_list_size)
1305 permut = GNUNET_CRYPTO_random_permute (GNUNET_CRYPTO_QUALITY_STRONG,
1306 (unsigned int) gossip_list_size);
1307 n_peers = ceil (alpha * gossip_list_size);
1308 LOG (GNUNET_ERROR_TYPE_DEBUG,
1309 "Going to send pushes to %u ceil (%f * %u) peers.\n",
1310 n_peers, alpha, gossip_list_size);
1311 for (i = 0 ; i < n_peers ; i++)
1313 peer = gossip_list[permut[i]];
1314 if (0 != GNUNET_CRYPTO_cmp_peer_identity (&own_identity, &peer)) // TODO
1315 { // FIXME if this fails schedule/loop this for later
1316 LOG (GNUNET_ERROR_TYPE_DEBUG,
1317 "Sending PUSH to peer %s of gossiped list.\n",
1318 GNUNET_i2s (&peer));
1320 ev = GNUNET_MQ_msg_header (GNUNET_MESSAGE_TYPE_RPS_PP_PUSH);
1321 mq = get_mq (peer_map, &peer);
1322 GNUNET_MQ_send (mq, ev);
1325 GNUNET_free (permut);
1329 /* Send PULL requests */
1330 //permut = GNUNET_CRYPTO_random_permute (GNUNET_CRYPTO_QUALITY_STRONG, (unsigned int) sampler_list->size);
1331 n_peers = ceil (beta * gossip_list_size);
1332 LOG (GNUNET_ERROR_TYPE_DEBUG,
1333 "Going to send pulls to %u ceil (%f * %u) peers.\n",
1334 n_peers, beta, gossip_list_size);
1335 for (i = 0 ; i < n_peers ; i++)
1337 tmp_peer = get_rand_peer_ignore_list (gossip_list, gossip_list_size,
1338 pending_pull_reply_list, pending_pull_reply_list_size);
1339 if (NULL != tmp_peer)
1342 GNUNET_free (tmp_peer);
1344 GNUNET_array_append (pending_pull_reply_list, pending_pull_reply_list_size, peer);
1346 if (0 != GNUNET_CRYPTO_cmp_peer_identity (&own_identity, &peer))
1347 { // FIXME if this fails schedule/loop this for later
1348 LOG (GNUNET_ERROR_TYPE_DEBUG,
1349 "Sending PULL request to peer %s of gossiped list.\n",
1350 GNUNET_i2s (&peer));
1352 ev = GNUNET_MQ_msg_header (GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REQUEST);
1353 mq = get_mq (peer_map, &peer);
1354 GNUNET_MQ_send (mq, ev);
1360 /* Update gossip list */
1362 if ( push_list_size <= alpha * gossip_list_size &&
1363 push_list_size != 0 &&
1364 pull_list_size != 0 )
1366 LOG (GNUNET_ERROR_TYPE_DEBUG, "Update of the gossip list.\n");
1368 uint32_t first_border;
1369 uint32_t second_border;
1371 uint32_t peers_to_clean_size;
1372 struct GNUNET_PeerIdentity *peers_to_clean;
1374 peers_to_clean = NULL;
1375 peers_to_clean_size = 0;
1376 GNUNET_array_grow (peers_to_clean, peers_to_clean_size, gossip_list_size);
1377 memcpy (peers_to_clean,
1379 gossip_list_size * sizeof (struct GNUNET_PeerIdentity));
1381 first_border = ceil (alpha * sampler_size_est_need);
1382 second_border = first_border + ceil (beta * sampler_size_est_need);
1384 GNUNET_array_grow (gossip_list, gossip_list_size, second_border);
1386 for (i = 0 ; i < first_border ; i++)
1387 { // TODO use RPS_sampler_get_n_rand_peers
1388 /* Update gossip list with peers received through PUSHes */
1389 r_index = GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_STRONG,
1391 gossip_list[i] = push_list[r_index];
1392 // TODO change the peer_flags accordingly
1395 for (i = first_border ; i < second_border ; i++)
1397 /* Update gossip list with peers received through PULLs */
1398 r_index = GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_STRONG,
1400 gossip_list[i] = pull_list[r_index];
1401 // TODO change the peer_flags accordingly
1404 for (i = second_border ; i < sampler_size_est_need ; i++)
1406 /* Update gossip list with peers from history */
1407 RPS_sampler_get_n_rand_peers (prot_sampler, hist_update, NULL, 1, GNUNET_NO);
1408 num_hist_update_tasks++;
1409 // TODO change the peer_flags accordingly
1412 for (i = 0 ; i < gossip_list_size ; i++)
1413 rem_from_list (&peers_to_clean, &peers_to_clean_size, &gossip_list[i]);
1415 for (i = 0 ; i < peers_to_clean_size ; i++)
1416 peer_clean (&peers_to_clean[i]);
1418 GNUNET_free (peers_to_clean);
1422 LOG (GNUNET_ERROR_TYPE_DEBUG, "No update of the gossip list.\n");
1424 // TODO independent of that also get some peers from CADET_get_peers()?
1427 /* Update samplers */
1428 for ( i = 0 ; i < push_list_size ; i++ )
1430 RPS_sampler_update (prot_sampler, &push_list[i]);
1431 RPS_sampler_update (client_sampler, &push_list[i]);
1432 // TODO set in_flag?
1435 for ( i = 0 ; i < pull_list_size ; i++ )
1437 RPS_sampler_update (prot_sampler, &push_list[i]);
1438 RPS_sampler_update (client_sampler, &push_list[i]);
1439 // TODO set in_flag?
1443 /* Empty push/pull lists */
1444 GNUNET_array_grow (push_list, push_list_size, 0);
1445 GNUNET_array_grow (pull_list, pull_list_size, 0);
1447 struct GNUNET_TIME_Relative time_next_round;
1448 struct GNUNET_TIME_Relative half_round_interval;
1449 unsigned int rand_delay;
1452 /* Compute random time value between .5 * round_interval and 1.5 *round_interval */
1453 half_round_interval = GNUNET_TIME_relative_divide (round_interval, 2);
1457 * Compute random value between (0 and 1) * round_interval
1458 * via multiplying round_interval with a 'fraction' (0 to value)/value
1460 rand_delay = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, UINT_MAX/10);
1461 time_next_round = GNUNET_TIME_relative_multiply (round_interval, rand_delay);
1462 time_next_round = GNUNET_TIME_relative_divide (time_next_round, UINT_MAX/10);
1463 time_next_round = GNUNET_TIME_relative_add (time_next_round, half_round_interval);
1464 } while (GNUNET_TIME_UNIT_FOREVER_REL.rel_value_us == time_next_round.rel_value_us);
1466 /* Schedule next round */
1467 do_round_task = GNUNET_SCHEDULER_add_delayed (round_interval, &do_round, NULL);
1468 LOG (GNUNET_ERROR_TYPE_DEBUG, "Finished round\n");
1473 rps_start (struct GNUNET_SERVER_Handle *server);
1477 * This is called from GNUNET_CADET_get_peers().
1479 * It is called on every peer(ID) that cadet somehow has contact with.
1480 * We use those to initialise the sampler.
1483 init_peer_cb (void *cls,
1484 const struct GNUNET_PeerIdentity *peer,
1485 int tunnel, // "Do we have a tunnel towards this peer?"
1486 unsigned int n_paths, // "Number of known paths towards this peer"
1487 unsigned int best_path) // "How long is the best path?
1488 // (0 = unknown, 1 = ourselves, 2 = neighbor)"
1490 struct GNUNET_SERVER_Handle *server;
1491 struct PeerOutstandingOp out_op;
1492 struct PeerContext *peer_ctx;
1494 server = (struct GNUNET_SERVER_Handle *) cls;
1496 && 0 != GNUNET_CRYPTO_cmp_peer_identity (&own_identity, peer))
1498 LOG (GNUNET_ERROR_TYPE_DEBUG,
1499 "Got peer %s (at %p) from CADET (gossip_list_size: %u)\n",
1500 GNUNET_i2s (peer), peer, gossip_list_size);
1502 // maybe create a function for that
1503 peer_ctx = get_peer_ctx (peer_map, peer);
1504 // FIXME this peer might already be marked as LIVE
1505 if (GNUNET_NO == insert_in_sampler_scheduled (peer_ctx))
1507 out_op.op = insert_in_sampler;
1508 out_op.op_cls = NULL;
1509 GNUNET_array_append (peer_ctx->outstanding_ops,
1510 peer_ctx->num_outstanding_ops,
1514 if (GNUNET_NO == insert_in_gossip_list_scheduled (peer_ctx))
1516 out_op.op = insert_in_gossip_list;
1517 out_op.op_cls = NULL;
1518 GNUNET_array_append (peer_ctx->outstanding_ops,
1519 peer_ctx->num_outstanding_ops,
1523 /* Trigger livelyness test on peer */
1524 (void) get_channel (peer_map, peer);
1526 // send push/pull to each of those peers?
1528 else if (NULL == peer)
1534 * Clean the send channel of a peer
1537 peer_clean (const struct GNUNET_PeerIdentity *peer)
1539 struct PeerContext *peer_ctx;
1540 struct GNUNET_CADET_Channel *channel;
1542 if (GNUNET_YES != in_arr (gossip_list, gossip_list_size, peer)
1543 && GNUNET_YES == GNUNET_CONTAINER_multipeermap_contains (peer_map, peer))
1545 peer_ctx = get_peer_ctx (peer_map, peer);
1546 if (NULL != peer_ctx->send_channel)
1548 channel = peer_ctx->send_channel;
1549 peer_ctx->send_channel = NULL;
1550 GNUNET_CADET_channel_destroy (channel);
1557 * Callback used to remove peers from the multipeermap.
1560 peer_remove_cb (void *cls, const struct GNUNET_PeerIdentity *key, void *value)
1562 struct PeerContext *peer_ctx;
1563 const struct GNUNET_CADET_Channel *channel =
1564 (const struct GNUNET_CADET_Channel *) cls;
1565 struct GNUNET_CADET_Channel *recv;
1566 struct GNUNET_CADET_Channel *send;
1568 if (GNUNET_YES == GNUNET_CONTAINER_multipeermap_contains (peer_map, value))
1570 peer_ctx = (struct PeerContext *) value;
1572 if (0 != peer_ctx->num_outstanding_ops)
1573 GNUNET_array_grow (peer_ctx->outstanding_ops,
1574 peer_ctx->num_outstanding_ops,
1577 if (NULL != peer_ctx->mq)
1578 GNUNET_MQ_destroy (peer_ctx->mq);
1580 if (NULL != peer_ctx->is_live_task)
1582 LOG (GNUNET_ERROR_TYPE_DEBUG,
1583 "Trying to cancle is_live_task for peer %s\n",
1585 GNUNET_CADET_notify_transmit_ready_cancel (peer_ctx->is_live_task);
1586 peer_ctx->is_live_task = NULL;
1589 send = peer_ctx->send_channel;
1590 peer_ctx->send_channel = NULL;
1591 recv = peer_ctx->send_channel;
1592 peer_ctx->recv_channel = NULL;
1597 GNUNET_CADET_channel_destroy (send);
1603 GNUNET_CADET_channel_destroy (recv);
1606 if (GNUNET_NO == GNUNET_CONTAINER_multipeermap_remove_all (peer_map, key))
1607 LOG (GNUNET_ERROR_TYPE_WARNING, "removing peer from peer_map failed\n");
1609 GNUNET_free (peer_ctx);
1617 * Task run during shutdown.
1623 shutdown_task (void *cls,
1624 const struct GNUNET_SCHEDULER_TaskContext *tc)
1626 LOG (GNUNET_ERROR_TYPE_DEBUG, "RPS is going down\n");
1628 if ( NULL != do_round_task )
1630 GNUNET_SCHEDULER_cancel (do_round_task);
1631 do_round_task = NULL;
1636 if (GNUNET_SYSERR ==
1637 GNUNET_CONTAINER_multipeermap_iterate (peer_map, peer_remove_cb, NULL))
1638 LOG (GNUNET_ERROR_TYPE_WARNING,
1639 "Iterating over peers to disconnect from them was cancelled\n");
1642 GNUNET_NSE_disconnect (nse);
1643 GNUNET_CADET_disconnect (cadet_handle);
1644 RPS_sampler_destroy (prot_sampler);
1645 RPS_sampler_destroy (client_sampler);
1646 GNUNET_break (0 == GNUNET_CONTAINER_multipeermap_size (peer_map));
1647 GNUNET_CONTAINER_multipeermap_destroy (peer_map);
1648 GNUNET_array_grow (gossip_list, gossip_list_size, 0);
1649 GNUNET_array_grow (push_list, push_list_size, 0);
1650 GNUNET_array_grow (pull_list, pull_list_size, 0);
1655 * A client disconnected. Remove all of its data structure entries.
1657 * @param cls closure, NULL
1658 * @param client identification of the client
1661 handle_client_disconnect (void *cls,
1662 struct GNUNET_SERVER_Client * client)
1668 * Handle the channel a peer opens to us.
1670 * @param cls The closure
1671 * @param channel The channel the peer wants to establish
1672 * @param initiator The peer's peer ID
1673 * @param port The port the channel is being established over
1674 * @param options Further options
1677 handle_inbound_channel (void *cls,
1678 struct GNUNET_CADET_Channel *channel,
1679 const struct GNUNET_PeerIdentity *initiator,
1681 enum GNUNET_CADET_ChannelOption options)
1683 struct PeerContext *peer_ctx;
1685 LOG (GNUNET_ERROR_TYPE_DEBUG,
1686 "New channel was established to us (Peer %s).\n",
1687 GNUNET_i2s (initiator));
1689 GNUNET_assert (NULL != channel);
1691 // we might not even store the recv_channel
1693 peer_ctx = get_peer_ctx (peer_map, initiator);
1694 // FIXME what do we do if a channel is established twice?
1695 // overwrite? Clean old channel? ...?
1696 //if (NULL != peer_ctx->recv_channel)
1698 // peer_ctx->recv_channel = channel;
1700 peer_ctx->recv_channel = channel;
1702 peer_ctx->mq = NULL;
1704 (void) GNUNET_CONTAINER_multipeermap_put (peer_map, initiator, peer_ctx,
1705 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
1707 peer_is_live (peer_ctx);
1709 return NULL; // TODO
1714 * This is called when a remote peer destroys a channel.
1716 * @param cls The closure
1717 * @param channel The channel being closed
1718 * @param channel_ctx The context associated with this channel
1721 cleanup_channel (void *cls,
1722 const struct GNUNET_CADET_Channel *channel,
1725 struct GNUNET_PeerIdentity *peer;
1726 struct PeerContext *peer_ctx;
1728 peer = (struct GNUNET_PeerIdentity *) GNUNET_CADET_channel_get_info (
1729 (struct GNUNET_CADET_Channel *) channel, GNUNET_CADET_OPTION_PEER);
1730 // Guess simply casting isn't the nicest way...
1731 // FIXME wait for cadet to change this function
1732 LOG (GNUNET_ERROR_TYPE_DEBUG, "Cleaning up channel to peer %s\n",
1735 if (GNUNET_YES == GNUNET_CONTAINER_multipeermap_contains (peer_map, peer))
1737 peer_ctx = GNUNET_CONTAINER_multipeermap_get (peer_map, peer);
1739 if (NULL == peer_ctx) /* It could have been removed by shutdown_task */
1742 if (channel == peer_ctx->send_channel)
1743 { /* Peer probably went down */
1744 rem_from_list (&gossip_list, &gossip_list_size, peer);
1745 rem_from_list (&pending_pull_reply_list, &pending_pull_reply_list_size, peer);
1747 /* Somwewhat {ab,re}use the iterator function */
1748 /* Cast to void is ok, because it's used as void in peer_remove_cb */
1749 (void) peer_remove_cb ((void *) channel, peer, peer_ctx);
1752 peer_ctx->recv_channel = NULL;
1758 * Actually start the service.
1761 rps_start (struct GNUNET_SERVER_Handle *server)
1763 static const struct GNUNET_SERVER_MessageHandler handlers[] = {
1764 {&handle_client_request, NULL, GNUNET_MESSAGE_TYPE_RPS_CS_REQUEST,
1765 sizeof (struct GNUNET_RPS_CS_RequestMessage)},
1766 {&handle_client_seed, NULL, GNUNET_MESSAGE_TYPE_RPS_CS_SEED, 0},
1770 GNUNET_SERVER_add_handlers (server, handlers);
1771 GNUNET_SERVER_disconnect_notify (server,
1772 &handle_client_disconnect,
1774 LOG (GNUNET_ERROR_TYPE_DEBUG, "Ready to receive requests from clients\n");
1777 num_hist_update_tasks = 0;
1779 do_round_task = GNUNET_SCHEDULER_add_now (&do_round, NULL);
1780 LOG (GNUNET_ERROR_TYPE_DEBUG, "Scheduled first round\n");
1782 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
1789 * Process statistics requests.
1791 * @param cls closure
1792 * @param server the initialized server
1793 * @param c configuration to use
1797 struct GNUNET_SERVER_Handle *server,
1798 const struct GNUNET_CONFIGURATION_Handle *c)
1800 // TODO check what this does -- copied from gnunet-boss
1801 // - seems to work as expected
1802 GNUNET_log_setup ("rps", GNUNET_error_type_to_string (GNUNET_ERROR_TYPE_DEBUG), NULL);
1807 GNUNET_CRYPTO_get_peer_identity (cfg, &own_identity); // TODO check return value
1808 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1809 "STARTING SERVICE (rps) for peer [%s]\n",
1810 GNUNET_i2s (&own_identity));
1813 /* Get time interval from the configuration */
1814 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_time (cfg, "RPS",
1818 LOG (GNUNET_ERROR_TYPE_DEBUG, "Failed to read ROUNDINTERVAL from config\n");
1819 GNUNET_SCHEDULER_shutdown ();
1823 /* Get initial size of sampler/gossip list from the configuration */
1824 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_number (cfg, "RPS",
1826 (long long unsigned int *) &sampler_size_est_need))
1828 LOG (GNUNET_ERROR_TYPE_DEBUG, "Failed to read INITSIZE from config\n");
1829 GNUNET_SCHEDULER_shutdown ();
1832 LOG (GNUNET_ERROR_TYPE_DEBUG, "INITSIZE is %" PRIu64 "\n", sampler_size_est_need);
1838 /* connect to NSE */
1839 nse = GNUNET_NSE_connect (cfg, nse_callback, NULL);
1840 // TODO check whether that was successful
1841 LOG (GNUNET_ERROR_TYPE_DEBUG, "Connected to NSE\n");
1847 peer_map = GNUNET_CONTAINER_multipeermap_create (sampler_size_est_need, GNUNET_NO);
1850 /* Initialise cadet */
1851 static const struct GNUNET_CADET_MessageHandler cadet_handlers[] = {
1852 {&handle_peer_push , GNUNET_MESSAGE_TYPE_RPS_PP_PUSH ,
1853 sizeof (struct GNUNET_MessageHeader)},
1854 {&handle_peer_pull_request, GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REQUEST,
1855 sizeof (struct GNUNET_MessageHeader)},
1856 {&handle_peer_pull_reply , GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REPLY , 0},
1860 const uint32_t ports[] = {GNUNET_RPS_CADET_PORT, 0}; // _PORT specified in src/rps/rps.h
1861 cadet_handle = GNUNET_CADET_connect (cfg,
1863 &handle_inbound_channel,
1867 LOG (GNUNET_ERROR_TYPE_DEBUG, "Connected to CADET\n");
1870 /* Initialise sampler */
1871 struct GNUNET_TIME_Relative half_round_interval;
1872 struct GNUNET_TIME_Relative max_round_interval;
1874 half_round_interval = GNUNET_TIME_relative_multiply (round_interval, .5);
1875 max_round_interval = GNUNET_TIME_relative_add (round_interval, half_round_interval);
1877 prot_sampler = RPS_sampler_init (sampler_size_est_need, max_round_interval);
1878 client_sampler = RPS_sampler_init (sampler_size_est_need, max_round_interval);
1880 /* Initialise push and pull maps */
1885 pending_pull_reply_list = NULL;
1886 pending_pull_reply_list_size = 0;
1889 LOG (GNUNET_ERROR_TYPE_DEBUG, "Requesting peers from CADET\n");
1890 GNUNET_CADET_get_peers (cadet_handle, &init_peer_cb, server);
1892 // TODO send push/pull to each of those peers?
1897 * The main function for the rps service.
1899 * @param argc number of arguments from the command line
1900 * @param argv command line arguments
1901 * @return 0 ok, 1 on error
1904 main (int argc, char *const *argv)
1906 return (GNUNET_OK ==
1907 GNUNET_SERVICE_run (argc,
1910 GNUNET_SERVICE_OPTION_NONE,
1911 &run, NULL)) ? 0 : 1;
1914 /* end of gnunet-service-rps.c */