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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",
458 for ( i = 0 ; i < *list_size ; i++ )
460 if (0 == GNUNET_CRYPTO_cmp_peer_identity (&tmp[i], peer))
462 if (i < *list_size -1)
463 { /* Not at the last entry -- shift peers left */
464 memcpy (&tmp[i], &tmp[i +1],
465 ((*list_size) - i -1) * sizeof (struct GNUNET_PeerIdentity));
467 /* Remove last entry (should be now useless PeerID) */
468 GNUNET_array_grow (tmp, *list_size, (*list_size) -1);
475 * Get random peer from the given list but don't return one from the @a ignore_list.
477 struct GNUNET_PeerIdentity *
478 get_rand_peer_ignore_list (const struct GNUNET_PeerIdentity *peer_list,
480 const struct GNUNET_PeerIdentity *ignore_list,
481 uint32_t ignore_size)
485 struct GNUNET_PeerIdentity *tmp_peer_list;
486 struct GNUNET_PeerIdentity *peer;
488 GNUNET_assert (NULL != peer_list);
493 tmp_peer_list = NULL;
494 GNUNET_array_grow (tmp_peer_list, tmp_size, list_size);
495 memcpy (tmp_peer_list,
497 list_size * sizeof (struct GNUNET_PeerIdentity));
498 peer = GNUNET_new (struct GNUNET_PeerIdentity);
501 * Choose the r_index of the peer we want to return
502 * at random from the interval of the gossip list
504 r_index = GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_STRONG,
506 *peer = tmp_peer_list[r_index];
508 while (in_arr (ignore_list, ignore_size, peer))
510 rem_from_list (&tmp_peer_list, &tmp_size, peer);
512 print_peer_list (tmp_peer_list, tmp_size);
521 * Choose the r_index of the peer we want to return
522 * at random from the interval of the gossip list
524 r_index = GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_STRONG,
526 *peer = tmp_peer_list[r_index];
530 GNUNET_array_grow (tmp_peer_list, tmp_size, 0);
537 * Get the context of a peer. If not existing, create.
540 get_peer_ctx (struct GNUNET_CONTAINER_MultiPeerMap *peer_map,
541 const struct GNUNET_PeerIdentity *peer)
543 struct PeerContext *ctx;
545 if ( GNUNET_YES == GNUNET_CONTAINER_multipeermap_contains (peer_map, peer))
547 ctx = GNUNET_CONTAINER_multipeermap_get (peer_map, peer);
551 ctx = GNUNET_new (struct PeerContext);
554 ctx->send_channel = NULL;
555 ctx->recv_channel = NULL;
556 ctx->outstanding_ops = NULL;
557 ctx->num_outstanding_ops = 0;
558 ctx->is_live_task = NULL;
559 ctx->peer_id = *peer;
560 (void) GNUNET_CONTAINER_multipeermap_put (peer_map, peer, ctx,
561 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
568 * Put random peer from sampler into the gossip list as history update.
571 hist_update (void *cls, struct GNUNET_PeerIdentity *ids, uint32_t num_peers)
573 GNUNET_assert (1 == num_peers);
575 if (gossip_list_size < sampler_size_est_need)
576 GNUNET_array_append (gossip_list, gossip_list_size, *ids);
578 if (0 < num_hist_update_tasks)
579 num_hist_update_tasks--;
584 * Set the peer flag to living and call the outstanding operations on this peer.
587 peer_is_live (struct PeerContext *peer_ctx)
589 struct GNUNET_PeerIdentity *peer;
591 peer = &peer_ctx->peer_id;
592 set_peer_flag (peer_ctx, VALID);
594 LOG (GNUNET_ERROR_TYPE_DEBUG, "Peer %s is live\n", GNUNET_i2s (peer));
596 if (0 != peer_ctx->num_outstanding_ops)
597 { /* Call outstanding operations */
600 for (i = 0 ; i < peer_ctx->num_outstanding_ops ; i++)
601 peer_ctx->outstanding_ops[i].op (peer_ctx->outstanding_ops[i].op_cls, peer);
602 GNUNET_array_grow (peer_ctx->outstanding_ops, peer_ctx->num_outstanding_ops, 0);
610 * Callback that is called when a channel was effectively established.
611 * This is given to ntfy_tmt_rdy and called when the channel was
612 * successfully established.
615 cadet_ntfy_tmt_rdy_cb (void *cls, size_t size, void *buf)
617 struct PeerContext *peer_ctx = (struct PeerContext *) cls;
621 peer_is_live (peer_ctx);
623 //if (NULL != peer_ctx->is_live_task)
625 // LOG (GNUNET_ERROR_TYPE_DEBUG,
626 // "Trying to cancle is_live_task for peer %s\n",
627 // GNUNET_i2s (&peer_ctx->peer_id));
628 // GNUNET_CADET_notify_transmit_ready_cancel (peer_ctx->is_live_task);
629 // peer_ctx->is_live_task = NULL;
631 peer_ctx->is_live_task = NULL;
638 * Get the channel of a peer. If not existing, create.
640 struct GNUNET_CADET_Channel *
641 get_channel (struct GNUNET_CONTAINER_MultiPeerMap *peer_map,
642 const struct GNUNET_PeerIdentity *peer)
644 struct PeerContext *ctx;
646 LOG (GNUNET_ERROR_TYPE_DEBUG,
647 "Trying to establish channel to peer %s\n",
650 ctx = get_peer_ctx (peer_map, peer);
651 if (NULL == ctx->send_channel)
653 ctx->send_channel = GNUNET_CADET_channel_create (cadet_handle,
656 GNUNET_RPS_CADET_PORT,
657 GNUNET_CADET_OPTION_RELIABLE);
659 /* If we don't know whether peer is live,
660 * get notified when we know it is live. */
661 if (GNUNET_YES != get_peer_flag (ctx, VALID)
662 && NULL != ctx->is_live_task
663 && NULL == ctx->recv_channel
664 && NULL == ctx->is_live_task)
666 ctx->peer_id = *peer;
667 LOG (GNUNET_ERROR_TYPE_DEBUG,
668 "Get informed about peer %s getting live\n",
671 GNUNET_CADET_notify_transmit_ready (ctx->send_channel,
673 GNUNET_TIME_UNIT_FOREVER_REL,
674 sizeof (struct GNUNET_MessageHeader),
675 cadet_ntfy_tmt_rdy_cb,
678 // FIXME check whether this is NULL
680 // do I have to explicitly put it in the peer_map?
681 (void) GNUNET_CONTAINER_multipeermap_put
685 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
687 return ctx->send_channel;
692 * Get the message queue of a specific peer.
694 * If we already have a message queue open to this client,
695 * simply return it, otherways create one.
697 struct GNUNET_MQ_Handle *
698 get_mq (struct GNUNET_CONTAINER_MultiPeerMap *peer_map,
699 const struct GNUNET_PeerIdentity *peer_id)
701 struct PeerContext *peer_ctx;
703 peer_ctx = get_peer_ctx (peer_map, peer_id);
705 GNUNET_assert (NULL == peer_ctx->is_live_task);
707 if (NULL == peer_ctx->mq)
709 (void) get_channel (peer_map, peer_id);
710 peer_ctx->mq = GNUNET_CADET_mq_create (peer_ctx->send_channel);
711 //do I have to explicitly put it in the peer_map?
712 (void) GNUNET_CONTAINER_multipeermap_put (peer_map, peer_id, peer_ctx,
713 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
720 * Sum all time relatives of an array.
722 struct GNUNET_TIME_Relative
723 T_relative_sum (const struct GNUNET_TIME_Relative *rel_array, uint32_t arr_size)
725 struct GNUNET_TIME_Relative sum;
728 sum = GNUNET_TIME_UNIT_ZERO;
729 for ( i = 0 ; i < arr_size ; i++ )
731 sum = GNUNET_TIME_relative_add (sum, rel_array[i]);
738 * Compute the average of given time relatives.
740 struct GNUNET_TIME_Relative
741 T_relative_avg (const struct GNUNET_TIME_Relative *rel_array, uint32_t arr_size)
743 return GNUNET_TIME_relative_divide (T_relative_sum (rel_array, arr_size), arr_size);
748 * Insert PeerID in #pull_list
750 * Called once we know a peer is live.
753 insert_in_pull_list (void *cls, const struct GNUNET_PeerIdentity *peer)
755 if (GNUNET_NO == in_arr (pull_list, pull_list_size, peer))
756 GNUNET_array_append (pull_list, pull_list_size, *peer);
762 * Check whether #insert_in_pull_list was already scheduled
765 insert_in_pull_list_scheduled (const struct PeerContext *peer_ctx)
769 for ( i = 0 ; i < peer_ctx->num_outstanding_ops ; i++ )
770 if (insert_in_pull_list == peer_ctx->outstanding_ops[i].op)
777 * Insert PeerID in #gossip_list
779 * Called once we know a peer is live.
782 insert_in_gossip_list (void *cls, const struct GNUNET_PeerIdentity *peer)
784 if (GNUNET_NO == in_arr (gossip_list, gossip_list_size, peer))
785 GNUNET_array_append (gossip_list, gossip_list_size, *peer);
787 (void) get_channel (peer_map, peer);
791 * Check whether #insert_in_gossip_list was already scheduled
794 insert_in_gossip_list_scheduled (const struct PeerContext *peer_ctx)
798 for ( i = 0 ; i < peer_ctx->num_outstanding_ops ; i++ )
799 if (insert_in_gossip_list == peer_ctx->outstanding_ops[i].op)
806 * Update sampler with given PeerID.
809 insert_in_sampler (void *cls, const struct GNUNET_PeerIdentity *peer)
811 LOG (GNUNET_ERROR_TYPE_DEBUG,
812 "Updating samplers with peer %s from insert_in_sampler()\n",
814 RPS_sampler_update (prot_sampler, peer);
815 RPS_sampler_update (client_sampler, peer);
820 * Check whether #insert_in_sampler was already scheduled
823 insert_in_sampler_scheduled (const struct PeerContext *peer_ctx)
827 for ( i = 0 ; i < peer_ctx->num_outstanding_ops ; i++ )
828 if (insert_in_sampler== peer_ctx->outstanding_ops[i].op)
835 * Wrapper around #RPS_sampler_resize()
837 * If we do not have enough sampler elements, double current sampler size
838 * If we have more than enough sampler elements, halv current sampler size
841 resize_wrapper (struct RPS_Sampler *sampler, uint32_t new_size)
843 unsigned int sampler_size;
846 // TODO respect the min, max
847 sampler_size = RPS_sampler_get_size (sampler);
848 if (sampler_size > new_size * 4)
850 RPS_sampler_resize (sampler, sampler_size / 2);
852 else if (sampler_size < new_size)
854 RPS_sampler_resize (sampler, sampler_size * 2);
856 LOG (GNUNET_ERROR_TYPE_DEBUG, "sampler_size is now %u\n", sampler_size);
861 * Wrapper around #RPS_sampler_resize() resizing the client sampler
864 client_resize_wrapper ()
866 uint32_t bigger_size;
867 unsigned int sampler_size;
871 sampler_size = RPS_sampler_get_size (client_sampler);
873 if (sampler_size_est_need > sampler_size_client_need)
874 bigger_size = sampler_size_est_need;
876 bigger_size = sampler_size_client_need;
878 // TODO respect the min, max
879 resize_wrapper (client_sampler, bigger_size);
880 LOG (GNUNET_ERROR_TYPE_DEBUG, "sampler_size is now %u\n", sampler_size);
885 * Estimate request rate
887 * Called every time we receive a request from the client.
892 struct GNUNET_TIME_Relative max_round_duration;
894 if (request_deltas_size > req_counter)
896 if ( 1 < req_counter)
898 /* Shift last request deltas to the right */
899 memcpy (&request_deltas[1],
901 (req_counter - 1) * sizeof (struct GNUNET_TIME_Relative));
903 /* Add current delta to beginning */
905 GNUNET_TIME_absolute_get_difference (last_request,
906 GNUNET_TIME_absolute_get ());
907 request_rate = T_relative_avg (request_deltas, req_counter);
909 /* Compute the duration a round will maximally take */
911 GNUNET_TIME_relative_add (round_interval,
912 GNUNET_TIME_relative_divide (round_interval, 2));
914 /* Set the estimated size the sampler has to have to
915 * satisfy the current client request rate */
916 sampler_size_client_need =
917 max_round_duration.rel_value_us / request_rate.rel_value_us;
919 /* Resize the sampler */
920 client_resize_wrapper ();
922 last_request = GNUNET_TIME_absolute_get ();
926 /***********************************************************************
928 ***********************************************************************/
935 * Function called by NSE.
937 * Updates sizes of sampler list and gossip list and adapt those lists
941 nse_callback (void *cls, struct GNUNET_TIME_Absolute timestamp,
942 double logestimate, double std_dev)
945 //double scale; // TODO this might go gloabal/config
947 LOG (GNUNET_ERROR_TYPE_DEBUG,
948 "Received a ns estimate - logest: %f, std_dev: %f (old_size: %u)\n",
949 logestimate, std_dev, RPS_sampler_get_size (prot_sampler));
951 estimate = GNUNET_NSE_log_estimate_to_n (logestimate);
952 // GNUNET_NSE_log_estimate_to_n (logestimate);
953 estimate = pow (estimate, 1.0 / 3);
954 // TODO add if std_dev is a number
955 // estimate += (std_dev * scale);
956 if (2 < ceil (estimate))
958 LOG (GNUNET_ERROR_TYPE_DEBUG, "Changing estimate to %f\n", estimate);
959 sampler_size_est_need = estimate;
961 LOG (GNUNET_ERROR_TYPE_DEBUG, "Not using estimate %f\n", estimate);
963 /* If the NSE has changed adapt the lists accordingly */
964 resize_wrapper (prot_sampler, sampler_size_est_need);
965 client_resize_wrapper ();
970 * Callback called once the requested PeerIDs are ready.
972 * Sends those to the requesting client.
974 void client_respond (void *cls,
975 struct GNUNET_PeerIdentity *ids, uint32_t num_peers)
977 LOG (GNUNET_ERROR_TYPE_DEBUG, "sampler returned %" PRIX32 " peers\n", num_peers);
978 struct GNUNET_MQ_Envelope *ev;
979 struct GNUNET_RPS_CS_ReplyMessage *out_msg;
980 struct GNUNET_SERVER_Client *client;
981 uint32_t size_needed;
982 struct client_ctx *cli_ctx;
984 client = (struct GNUNET_SERVER_Client *) cls;
986 size_needed = sizeof (struct GNUNET_RPS_CS_ReplyMessage) +
987 num_peers * sizeof (struct GNUNET_PeerIdentity);
989 GNUNET_assert (GNUNET_SERVER_MAX_MESSAGE_SIZE >= size_needed);
991 ev = GNUNET_MQ_msg_extra (out_msg,
992 num_peers * sizeof (struct GNUNET_PeerIdentity),
993 GNUNET_MESSAGE_TYPE_RPS_CS_REPLY);
994 out_msg->num_peers = htonl (num_peers);
998 num_peers * sizeof (struct GNUNET_PeerIdentity));
1001 cli_ctx = GNUNET_SERVER_client_get_user_context (client, struct client_ctx);
1002 if ( NULL == cli_ctx ) {
1003 cli_ctx = GNUNET_new (struct client_ctx);
1004 cli_ctx->mq = GNUNET_MQ_queue_for_server_client (client);
1005 GNUNET_SERVER_client_set_user_context (client, cli_ctx);
1008 GNUNET_MQ_send (cli_ctx->mq, ev);
1013 * Handle RPS request from the client.
1015 * @param cls closure
1016 * @param client identification of the client
1017 * @param message the actual message
1020 handle_client_request (void *cls,
1021 struct GNUNET_SERVER_Client *client,
1022 const struct GNUNET_MessageHeader *message)
1024 struct GNUNET_RPS_CS_RequestMessage *msg;
1026 uint32_t size_needed;
1029 msg = (struct GNUNET_RPS_CS_RequestMessage *) message;
1031 num_peers = ntohl (msg->num_peers);
1032 size_needed = sizeof (struct GNUNET_RPS_CS_ReplyMessage) +
1033 num_peers * sizeof (struct GNUNET_PeerIdentity);
1035 if (GNUNET_SERVER_MAX_MESSAGE_SIZE < size_needed)
1037 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
1041 for (i = 0 ; i < num_peers ; i++)
1044 LOG (GNUNET_ERROR_TYPE_DEBUG, "Client requested %" PRIX32 " random peer(s).\n", num_peers);
1046 RPS_sampler_get_n_rand_peers (client_sampler, client_respond,
1047 client, num_peers, GNUNET_YES);
1049 GNUNET_SERVER_receive_done (client,
1055 * Handle seed from the client.
1057 * @param cls closure
1058 * @param client identification of the client
1059 * @param message the actual message
1062 handle_client_seed (void *cls,
1063 struct GNUNET_SERVER_Client *client,
1064 const struct GNUNET_MessageHeader *message)
1066 struct GNUNET_RPS_CS_SeedMessage *in_msg;
1067 struct GNUNET_PeerIdentity *peers;
1071 if (sizeof (struct GNUNET_RPS_CS_SeedMessage) > ntohs (message->size))
1073 GNUNET_break_op (0);
1074 GNUNET_SERVER_receive_done (client,
1078 in_msg = (struct GNUNET_RPS_CS_SeedMessage *) message;
1079 num_peers = ntohl (in_msg->num_peers);
1080 peers = (struct GNUNET_PeerIdentity *) &in_msg[1];
1081 //peers = GNUNET_new_array (num_peers, struct GNUNET_PeerIdentity);
1082 //memcpy (peers, &in_msg[1], num_peers * sizeof (struct GNUNET_PeerIdentity));
1084 if ((ntohs (message->size) - sizeof (struct GNUNET_RPS_CS_SeedMessage)) /
1085 sizeof (struct GNUNET_PeerIdentity) != num_peers)
1087 GNUNET_break_op (0);
1088 GNUNET_SERVER_receive_done (client,
1092 LOG (GNUNET_ERROR_TYPE_DEBUG,
1093 "Client seeded peers:\n");
1094 print_peer_list (peers, num_peers);
1096 // TODO check for validity of ids
1098 for (i = 0 ; i < num_peers ; i++)
1100 LOG (GNUNET_ERROR_TYPE_DEBUG,
1101 "Updating samplers with seed %" PRIX32 ": %s\n",
1103 GNUNET_i2s (&peers[i]));
1105 RPS_sampler_update (prot_sampler, &peers[i]);
1106 RPS_sampler_update (client_sampler, &peers[i]);
1109 //GNUNET_free (peers);
1111 GNUNET_SERVER_receive_done (client,
1117 * Handle a PUSH message from another peer.
1119 * Check the proof of work and store the PeerID
1120 * in the temporary list for pushed PeerIDs.
1122 * @param cls Closure
1123 * @param channel The channel the PUSH was received over
1124 * @param channel_ctx The context associated with this channel
1125 * @param msg The message header
1128 handle_peer_push (void *cls,
1129 struct GNUNET_CADET_Channel *channel,
1131 const struct GNUNET_MessageHeader *msg)
1133 const struct GNUNET_PeerIdentity *peer;
1135 // (check the proof of work)
1137 peer = (const struct GNUNET_PeerIdentity *) GNUNET_CADET_channel_get_info (channel, GNUNET_CADET_OPTION_PEER);
1138 // FIXME wait for cadet to change this function
1139 LOG (GNUNET_ERROR_TYPE_DEBUG, "PUSH received (%s)\n", GNUNET_i2s (peer));
1141 /* Add the sending peer to the push_list */
1142 if (GNUNET_NO == in_arr (push_list, push_list_size, peer))
1143 GNUNET_array_append (push_list, push_list_size, *peer);
1149 * Handle PULL REQUEST request message from another peer.
1151 * Reply with the gossip list of PeerIDs.
1153 * @param cls Closure
1154 * @param channel The channel the PUSH was received over
1155 * @param channel_ctx The context associated with this channel
1156 * @param msg The message header
1159 handle_peer_pull_request (void *cls,
1160 struct GNUNET_CADET_Channel *channel,
1162 const struct GNUNET_MessageHeader *msg)
1164 struct GNUNET_PeerIdentity *peer;
1166 struct GNUNET_MQ_Handle *mq;
1167 struct GNUNET_MQ_Envelope *ev;
1168 struct GNUNET_RPS_P2P_PullReplyMessage *out_msg;
1171 peer = (struct GNUNET_PeerIdentity *) GNUNET_CADET_channel_get_info (channel,
1172 GNUNET_CADET_OPTION_PEER);
1173 // FIXME wait for cadet to change this function
1175 /* Compute actual size */
1176 send_size = sizeof (struct GNUNET_RPS_P2P_PullReplyMessage) +
1177 gossip_list_size * sizeof (struct GNUNET_PeerIdentity);
1179 if (GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE < send_size)
1180 /* Compute number of peers to send
1181 * If too long, simply truncate */
1183 (GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE -
1184 sizeof (struct GNUNET_RPS_P2P_PullReplyMessage)) /
1185 sizeof (struct GNUNET_PeerIdentity);
1187 send_size = gossip_list_size;
1189 LOG (GNUNET_ERROR_TYPE_DEBUG,
1190 "PULL REQUEST from peer %s received, going to send %u peers\n",
1191 GNUNET_i2s (peer), send_size);
1193 mq = get_mq (peer_map, peer);
1195 ev = GNUNET_MQ_msg_extra (out_msg,
1196 send_size * sizeof (struct GNUNET_PeerIdentity),
1197 GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REPLY);
1198 //out_msg->num_peers = htonl (gossip_list_size);
1199 out_msg->num_peers = htonl (send_size);
1200 memcpy (&out_msg[1], gossip_list,
1201 send_size * sizeof (struct GNUNET_PeerIdentity));
1203 GNUNET_MQ_send (mq, ev);
1209 * Handle PULL REPLY message from another peer.
1211 * Check whether we sent a corresponding request and
1212 * whether this reply is the first one.
1214 * @param cls Closure
1215 * @param channel The channel the PUSH was received over
1216 * @param channel_ctx The context associated with this channel
1217 * @param msg The message header
1220 handle_peer_pull_reply (void *cls,
1221 struct GNUNET_CADET_Channel *channel,
1223 const struct GNUNET_MessageHeader *msg)
1225 LOG (GNUNET_ERROR_TYPE_DEBUG, "PULL REPLY received\n");
1227 struct GNUNET_RPS_P2P_PullReplyMessage *in_msg;
1228 struct GNUNET_PeerIdentity *peers;
1229 struct PeerContext *peer_ctx;
1230 struct GNUNET_PeerIdentity *sender;
1231 struct PeerContext *sender_ctx;
1232 struct PeerOutstandingOp out_op;
1235 /* Check for protocol violation */
1236 if (sizeof (struct GNUNET_RPS_P2P_PullReplyMessage) > ntohs (msg->size))
1238 GNUNET_break_op (0);
1239 return GNUNET_SYSERR;
1241 in_msg = (struct GNUNET_RPS_P2P_PullReplyMessage *) msg;
1242 if ((ntohs (msg->size) - sizeof (struct GNUNET_RPS_P2P_PullReplyMessage)) /
1243 sizeof (struct GNUNET_PeerIdentity) != ntohl (in_msg->num_peers))
1245 LOG (GNUNET_ERROR_TYPE_ERROR,
1246 "message says it sends %" PRIu64 " peers, have space for %i peers\n",
1247 ntohl (in_msg->num_peers),
1248 (ntohs (msg->size) - sizeof (struct GNUNET_RPS_P2P_PullReplyMessage)) /
1249 sizeof (struct GNUNET_PeerIdentity));
1250 GNUNET_break_op (0);
1251 return GNUNET_SYSERR;
1254 sender = (struct GNUNET_PeerIdentity *) GNUNET_CADET_channel_get_info (
1255 (struct GNUNET_CADET_Channel *) channel, GNUNET_CADET_OPTION_PEER);
1256 // Guess simply casting isn't the nicest way...
1257 // FIXME wait for cadet to change this function
1258 sender_ctx = get_peer_ctx (peer_map, sender);
1260 if (GNUNET_YES == get_peer_flag (sender_ctx, PULL_REPLY_PENDING))
1262 GNUNET_break_op (0);
1266 /* Do actual logic */
1267 peers = (struct GNUNET_PeerIdentity *) &msg[1];
1268 for (i = 0 ; i < ntohl (in_msg->num_peers) ; i++)
1270 peer_ctx = get_peer_ctx (peer_map, &peers[i]);
1271 if (GNUNET_YES == get_peer_flag (peer_ctx, VALID)
1272 || NULL != peer_ctx->send_channel
1273 || NULL != peer_ctx->recv_channel)
1275 if (GNUNET_NO == in_arr (pull_list, pull_list_size, &peers[i])
1276 && GNUNET_CRYPTO_cmp_peer_identity (&own_identity, &peers[i]))
1277 GNUNET_array_append (pull_list, pull_list_size, peers[i]);
1279 else if (GNUNET_NO == insert_in_pull_list_scheduled (peer_ctx))
1281 out_op.op = insert_in_pull_list;
1282 out_op.op_cls = NULL;
1283 GNUNET_array_append (peer_ctx->outstanding_ops,
1284 peer_ctx->num_outstanding_ops,
1289 unset_peer_flag (sender_ctx, PULL_REPLY_PENDING);
1290 rem_from_list (&pending_pull_reply_list, &pending_pull_reply_list_size, sender);
1297 * Send out PUSHes and PULLs.
1299 * This is executed regylary.
1302 do_round (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1304 LOG (GNUNET_ERROR_TYPE_DEBUG, "Going to execute next round\n");
1307 unsigned int *permut;
1308 unsigned int n_peers; /* Number of peers we send pushes/pulls to */
1309 struct GNUNET_MQ_Envelope *ev;
1310 struct GNUNET_PeerIdentity peer;
1311 struct GNUNET_PeerIdentity *tmp_peer;
1312 struct GNUNET_MQ_Handle *mq;
1314 LOG (GNUNET_ERROR_TYPE_DEBUG,
1315 "Printing gossip list:\n");
1316 for (i = 0 ; i < gossip_list_size ; i++)
1317 LOG (GNUNET_ERROR_TYPE_DEBUG,
1318 "\t%s\n", GNUNET_i2s (&gossip_list[i]));
1319 // TODO log lists, ...
1321 /* Would it make sense to have one shuffeled gossip list and then
1322 * to send PUSHes to first alpha peers, PULL requests to next beta peers and
1323 * use the rest to update sampler?
1324 * in essence get random peers with consumption */
1327 if (0 < gossip_list_size)
1329 permut = GNUNET_CRYPTO_random_permute (GNUNET_CRYPTO_QUALITY_STRONG,
1330 (unsigned int) gossip_list_size);
1331 n_peers = ceil (alpha * gossip_list_size);
1332 LOG (GNUNET_ERROR_TYPE_DEBUG,
1333 "Going to send pushes to %u ceil (%f * %u) peers.\n",
1334 n_peers, alpha, gossip_list_size);
1335 for (i = 0 ; i < n_peers ; i++)
1337 peer = gossip_list[permut[i]];
1338 if (0 != GNUNET_CRYPTO_cmp_peer_identity (&own_identity, &peer)) // TODO
1339 { // FIXME if this fails schedule/loop this for later
1340 LOG (GNUNET_ERROR_TYPE_DEBUG,
1341 "Sending PUSH to peer %s of gossiped list.\n",
1342 GNUNET_i2s (&peer));
1344 ev = GNUNET_MQ_msg_header (GNUNET_MESSAGE_TYPE_RPS_PP_PUSH);
1345 mq = get_mq (peer_map, &peer);
1346 GNUNET_MQ_send (mq, ev);
1349 GNUNET_free (permut);
1353 /* Send PULL requests */
1354 //permut = GNUNET_CRYPTO_random_permute (GNUNET_CRYPTO_QUALITY_STRONG, (unsigned int) sampler_list->size);
1355 n_peers = ceil (beta * gossip_list_size);
1356 LOG (GNUNET_ERROR_TYPE_DEBUG,
1357 "Going to send pulls to %u ceil (%f * %u) peers.\n",
1358 n_peers, beta, gossip_list_size);
1359 for (i = 0 ; i < n_peers ; i++)
1361 tmp_peer = get_rand_peer_ignore_list (gossip_list, gossip_list_size,
1362 pending_pull_reply_list, pending_pull_reply_list_size);
1363 if (NULL != tmp_peer)
1366 GNUNET_free (tmp_peer);
1368 GNUNET_array_append (pending_pull_reply_list, pending_pull_reply_list_size, peer);
1370 if (0 != GNUNET_CRYPTO_cmp_peer_identity (&own_identity, &peer))
1371 { // FIXME if this fails schedule/loop this for later
1372 LOG (GNUNET_ERROR_TYPE_DEBUG,
1373 "Sending PULL request to peer %s of gossiped list.\n",
1374 GNUNET_i2s (&peer));
1376 ev = GNUNET_MQ_msg_header (GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REQUEST);
1377 mq = get_mq (peer_map, &peer);
1378 GNUNET_MQ_send (mq, ev);
1384 /* Update gossip list */
1386 if ( push_list_size <= alpha * gossip_list_size &&
1387 push_list_size != 0 &&
1388 pull_list_size != 0 )
1390 LOG (GNUNET_ERROR_TYPE_DEBUG, "Update of the gossip list.\n");
1392 uint32_t first_border;
1393 uint32_t second_border;
1395 uint32_t peers_to_clean_size;
1396 struct GNUNET_PeerIdentity *peers_to_clean;
1398 peers_to_clean = NULL;
1399 peers_to_clean_size = 0;
1400 GNUNET_array_grow (peers_to_clean, peers_to_clean_size, gossip_list_size);
1401 memcpy (peers_to_clean,
1403 gossip_list_size * sizeof (struct GNUNET_PeerIdentity));
1405 first_border = ceil (alpha * sampler_size_est_need);
1406 second_border = first_border + ceil (beta * sampler_size_est_need);
1408 GNUNET_array_grow (gossip_list, gossip_list_size, second_border);
1410 for (i = 0 ; i < first_border ; i++)
1411 { // TODO use RPS_sampler_get_n_rand_peers
1412 /* Update gossip list with peers received through PUSHes */
1413 r_index = GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_STRONG,
1415 gossip_list[i] = push_list[r_index];
1416 // TODO change the peer_flags accordingly
1419 for (i = first_border ; i < second_border ; i++)
1421 /* Update gossip list with peers received through PULLs */
1422 r_index = GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_STRONG,
1424 gossip_list[i] = pull_list[r_index];
1425 // TODO change the peer_flags accordingly
1428 for (i = second_border ; i < sampler_size_est_need ; i++)
1430 /* Update gossip list with peers from history */
1431 RPS_sampler_get_n_rand_peers (prot_sampler, hist_update, NULL, 1, GNUNET_NO);
1432 num_hist_update_tasks++;
1433 // TODO change the peer_flags accordingly
1436 for (i = 0 ; i < gossip_list_size ; i++)
1437 rem_from_list (&peers_to_clean, &peers_to_clean_size, &gossip_list[i]);
1439 for (i = 0 ; i < peers_to_clean_size ; i++)
1440 peer_clean (&peers_to_clean[i]);
1442 GNUNET_free (peers_to_clean);
1446 LOG (GNUNET_ERROR_TYPE_DEBUG, "No update of the gossip list.\n");
1448 // TODO independent of that also get some peers from CADET_get_peers()?
1451 /* Update samplers */
1452 for ( i = 0 ; i < push_list_size ; i++ )
1454 LOG (GNUNET_ERROR_TYPE_DEBUG,
1455 "Updating with peer %s from push list\n",
1456 GNUNET_i2s (&push_list[i]));
1457 RPS_sampler_update (prot_sampler, &push_list[i]);
1458 RPS_sampler_update (client_sampler, &push_list[i]);
1459 // TODO set in_flag?
1462 for ( i = 0 ; i < pull_list_size ; i++ )
1464 LOG (GNUNET_ERROR_TYPE_DEBUG,
1465 "Updating with peer %s from pull list\n",
1466 GNUNET_i2s (&pull_list[i]));
1467 RPS_sampler_update (prot_sampler, &push_list[i]);
1468 RPS_sampler_update (client_sampler, &push_list[i]);
1469 // TODO set in_flag?
1473 /* Empty push/pull lists */
1474 GNUNET_array_grow (push_list, push_list_size, 0);
1475 GNUNET_array_grow (pull_list, pull_list_size, 0);
1477 struct GNUNET_TIME_Relative time_next_round;
1478 struct GNUNET_TIME_Relative half_round_interval;
1479 unsigned int rand_delay;
1482 /* Compute random time value between .5 * round_interval and 1.5 *round_interval */
1483 half_round_interval = GNUNET_TIME_relative_divide (round_interval, 2);
1487 * Compute random value between (0 and 1) * round_interval
1488 * via multiplying round_interval with a 'fraction' (0 to value)/value
1490 rand_delay = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, UINT_MAX/10);
1491 time_next_round = GNUNET_TIME_relative_multiply (round_interval, rand_delay);
1492 time_next_round = GNUNET_TIME_relative_divide (time_next_round, UINT_MAX/10);
1493 time_next_round = GNUNET_TIME_relative_add (time_next_round, half_round_interval);
1494 } while (GNUNET_TIME_UNIT_FOREVER_REL.rel_value_us == time_next_round.rel_value_us);
1496 /* Schedule next round */
1497 do_round_task = GNUNET_SCHEDULER_add_delayed (round_interval, &do_round, NULL);
1498 LOG (GNUNET_ERROR_TYPE_DEBUG, "Finished round\n");
1503 rps_start (struct GNUNET_SERVER_Handle *server);
1507 * This is called from GNUNET_CADET_get_peers().
1509 * It is called on every peer(ID) that cadet somehow has contact with.
1510 * We use those to initialise the sampler.
1513 init_peer_cb (void *cls,
1514 const struct GNUNET_PeerIdentity *peer,
1515 int tunnel, // "Do we have a tunnel towards this peer?"
1516 unsigned int n_paths, // "Number of known paths towards this peer"
1517 unsigned int best_path) // "How long is the best path?
1518 // (0 = unknown, 1 = ourselves, 2 = neighbor)"
1520 struct PeerOutstandingOp out_op;
1521 struct PeerContext *peer_ctx;
1524 && 0 != GNUNET_CRYPTO_cmp_peer_identity (&own_identity, peer))
1526 LOG (GNUNET_ERROR_TYPE_DEBUG,
1527 "Got peer %s (at %p) from CADET (gossip_list_size: %u)\n",
1528 GNUNET_i2s (peer), peer, gossip_list_size);
1530 // maybe create a function for that
1531 peer_ctx = get_peer_ctx (peer_map, peer);
1532 if (GNUNET_YES != get_peer_flag (peer_ctx, VALID))
1534 if (GNUNET_NO == insert_in_sampler_scheduled (peer_ctx))
1536 out_op.op = insert_in_sampler;
1537 out_op.op_cls = NULL;
1538 GNUNET_array_append (peer_ctx->outstanding_ops,
1539 peer_ctx->num_outstanding_ops,
1543 if (GNUNET_NO == insert_in_gossip_list_scheduled (peer_ctx))
1545 out_op.op = insert_in_gossip_list;
1546 out_op.op_cls = NULL;
1547 GNUNET_array_append (peer_ctx->outstanding_ops,
1548 peer_ctx->num_outstanding_ops,
1552 /* Trigger livelyness test on peer */
1553 (void) get_channel (peer_map, peer);
1556 // send push/pull to each of those peers?
1562 * Clean the send channel of a peer
1565 peer_clean (const struct GNUNET_PeerIdentity *peer)
1567 struct PeerContext *peer_ctx;
1568 struct GNUNET_CADET_Channel *channel;
1570 if (GNUNET_YES != in_arr (gossip_list, gossip_list_size, peer)
1571 && GNUNET_YES == GNUNET_CONTAINER_multipeermap_contains (peer_map, peer))
1573 peer_ctx = get_peer_ctx (peer_map, peer);
1574 if (NULL != peer_ctx->send_channel)
1576 channel = peer_ctx->send_channel;
1577 peer_ctx->send_channel = NULL;
1578 GNUNET_CADET_channel_destroy (channel);
1585 * Callback used to remove peers from the multipeermap.
1588 peer_remove_cb (void *cls, const struct GNUNET_PeerIdentity *key, void *value)
1590 struct PeerContext *peer_ctx;
1591 const struct GNUNET_CADET_Channel *channel =
1592 (const struct GNUNET_CADET_Channel *) cls;
1593 struct GNUNET_CADET_Channel *recv;
1594 struct GNUNET_CADET_Channel *send;
1596 if (GNUNET_YES == GNUNET_CONTAINER_multipeermap_contains (peer_map, value))
1598 peer_ctx = (struct PeerContext *) value;
1600 if (0 != peer_ctx->num_outstanding_ops)
1601 GNUNET_array_grow (peer_ctx->outstanding_ops,
1602 peer_ctx->num_outstanding_ops,
1605 if (NULL != peer_ctx->mq)
1606 GNUNET_MQ_destroy (peer_ctx->mq);
1608 if (NULL != peer_ctx->is_live_task)
1610 LOG (GNUNET_ERROR_TYPE_DEBUG,
1611 "Trying to cancle is_live_task for peer %s\n",
1613 GNUNET_CADET_notify_transmit_ready_cancel (peer_ctx->is_live_task);
1614 peer_ctx->is_live_task = NULL;
1617 send = peer_ctx->send_channel;
1618 peer_ctx->send_channel = NULL;
1622 GNUNET_CADET_channel_destroy (send);
1625 recv = peer_ctx->send_channel;
1626 peer_ctx->recv_channel = NULL;
1630 GNUNET_CADET_channel_destroy (recv);
1633 if (GNUNET_YES != GNUNET_CONTAINER_multipeermap_remove_all (peer_map, key))
1634 LOG (GNUNET_ERROR_TYPE_WARNING, "removing peer from peer_map failed\n");
1636 GNUNET_free (peer_ctx);
1644 * Task run during shutdown.
1650 shutdown_task (void *cls,
1651 const struct GNUNET_SCHEDULER_TaskContext *tc)
1653 LOG (GNUNET_ERROR_TYPE_DEBUG, "RPS is going down\n");
1655 if ( NULL != do_round_task )
1657 GNUNET_SCHEDULER_cancel (do_round_task);
1658 do_round_task = NULL;
1663 if (GNUNET_SYSERR ==
1664 GNUNET_CONTAINER_multipeermap_iterate (peer_map, peer_remove_cb, NULL))
1665 LOG (GNUNET_ERROR_TYPE_WARNING,
1666 "Iterating over peers to disconnect from them was cancelled\n");
1669 GNUNET_NSE_disconnect (nse);
1670 GNUNET_CADET_disconnect (cadet_handle);
1671 RPS_sampler_destroy (prot_sampler);
1672 RPS_sampler_destroy (client_sampler);
1673 LOG (GNUNET_ERROR_TYPE_DEBUG,
1674 "Size of the peermap: %u\n",
1675 GNUNET_CONTAINER_multipeermap_size (peer_map));
1676 GNUNET_break (0 == GNUNET_CONTAINER_multipeermap_size (peer_map));
1677 GNUNET_CONTAINER_multipeermap_destroy (peer_map);
1678 GNUNET_array_grow (gossip_list, gossip_list_size, 0);
1679 GNUNET_array_grow (push_list, push_list_size, 0);
1680 GNUNET_array_grow (pull_list, pull_list_size, 0);
1685 * A client disconnected. Remove all of its data structure entries.
1687 * @param cls closure, NULL
1688 * @param client identification of the client
1691 handle_client_disconnect (void *cls,
1692 struct GNUNET_SERVER_Client * client)
1698 * Handle the channel a peer opens to us.
1700 * @param cls The closure
1701 * @param channel The channel the peer wants to establish
1702 * @param initiator The peer's peer ID
1703 * @param port The port the channel is being established over
1704 * @param options Further options
1707 handle_inbound_channel (void *cls,
1708 struct GNUNET_CADET_Channel *channel,
1709 const struct GNUNET_PeerIdentity *initiator,
1711 enum GNUNET_CADET_ChannelOption options)
1713 struct PeerContext *peer_ctx;
1714 struct GNUNET_PeerIdentity peer;
1717 LOG (GNUNET_ERROR_TYPE_DEBUG,
1718 "New channel was established to us (Peer %s).\n",
1719 GNUNET_i2s (&peer));
1721 GNUNET_assert (NULL != channel);
1723 // we might not even store the recv_channel
1725 peer_ctx = get_peer_ctx (peer_map, &peer);
1726 // FIXME what do we do if a channel is established twice?
1727 // overwrite? Clean old channel? ...?
1728 //if (NULL != peer_ctx->recv_channel)
1730 // peer_ctx->recv_channel = channel;
1732 peer_ctx->recv_channel = channel;
1734 peer_ctx->mq = NULL;
1736 (void) GNUNET_CONTAINER_multipeermap_put (peer_map, &peer, peer_ctx,
1737 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
1739 peer_is_live (peer_ctx);
1741 return NULL; // TODO
1746 * This is called when a remote peer destroys a channel.
1748 * @param cls The closure
1749 * @param channel The channel being closed
1750 * @param channel_ctx The context associated with this channel
1753 cleanup_channel (void *cls,
1754 const struct GNUNET_CADET_Channel *channel,
1757 struct GNUNET_PeerIdentity *peer;
1758 struct PeerContext *peer_ctx;
1760 peer = (struct GNUNET_PeerIdentity *) GNUNET_CADET_channel_get_info (
1761 (struct GNUNET_CADET_Channel *) channel, GNUNET_CADET_OPTION_PEER);
1762 // Guess simply casting isn't the nicest way...
1763 // FIXME wait for cadet to change this function
1764 LOG (GNUNET_ERROR_TYPE_DEBUG, "Cleaning up channel to peer %s\n",
1767 if (GNUNET_YES == GNUNET_CONTAINER_multipeermap_contains (peer_map, peer))
1769 peer_ctx = GNUNET_CONTAINER_multipeermap_get (peer_map, peer);
1771 if (NULL == peer_ctx) /* It could have been removed by shutdown_task */
1774 if (channel == peer_ctx->send_channel)
1775 { /* Peer probably went down */
1776 rem_from_list (&gossip_list, &gossip_list_size, peer);
1777 rem_from_list (&pending_pull_reply_list, &pending_pull_reply_list_size, peer);
1779 /* Somwewhat {ab,re}use the iterator function */
1780 /* Cast to void is ok, because it's used as void in peer_remove_cb */
1781 (void) peer_remove_cb ((void *) channel, peer, peer_ctx);
1784 peer_ctx->recv_channel = NULL;
1790 * Actually start the service.
1793 rps_start (struct GNUNET_SERVER_Handle *server)
1795 static const struct GNUNET_SERVER_MessageHandler handlers[] = {
1796 {&handle_client_request, NULL, GNUNET_MESSAGE_TYPE_RPS_CS_REQUEST,
1797 sizeof (struct GNUNET_RPS_CS_RequestMessage)},
1798 {&handle_client_seed, NULL, GNUNET_MESSAGE_TYPE_RPS_CS_SEED, 0},
1802 GNUNET_SERVER_add_handlers (server, handlers);
1803 GNUNET_SERVER_disconnect_notify (server,
1804 &handle_client_disconnect,
1806 LOG (GNUNET_ERROR_TYPE_DEBUG, "Ready to receive requests from clients\n");
1809 do_round_task = GNUNET_SCHEDULER_add_now (&do_round, NULL);
1810 LOG (GNUNET_ERROR_TYPE_DEBUG, "Scheduled first round\n");
1812 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
1819 * Process statistics requests.
1821 * @param cls closure
1822 * @param server the initialized server
1823 * @param c configuration to use
1827 struct GNUNET_SERVER_Handle *server,
1828 const struct GNUNET_CONFIGURATION_Handle *c)
1830 // TODO check what this does -- copied from gnunet-boss
1831 // - seems to work as expected
1832 GNUNET_log_setup ("rps", GNUNET_error_type_to_string (GNUNET_ERROR_TYPE_DEBUG), NULL);
1837 GNUNET_CRYPTO_get_peer_identity (cfg, &own_identity); // TODO check return value
1838 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1839 "STARTING SERVICE (rps) for peer [%s]\n",
1840 GNUNET_i2s (&own_identity));
1843 /* Get time interval from the configuration */
1844 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_time (cfg, "RPS",
1848 LOG (GNUNET_ERROR_TYPE_DEBUG, "Failed to read ROUNDINTERVAL from config\n");
1849 GNUNET_SCHEDULER_shutdown ();
1853 /* Get initial size of sampler/gossip list from the configuration */
1854 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_number (cfg, "RPS",
1856 (long long unsigned int *) &sampler_size_est_need))
1858 LOG (GNUNET_ERROR_TYPE_DEBUG, "Failed to read INITSIZE from config\n");
1859 GNUNET_SCHEDULER_shutdown ();
1862 LOG (GNUNET_ERROR_TYPE_DEBUG, "INITSIZE is %" PRIu64 "\n", sampler_size_est_need);
1868 /* connect to NSE */
1869 nse = GNUNET_NSE_connect (cfg, nse_callback, NULL);
1870 // TODO check whether that was successful
1871 LOG (GNUNET_ERROR_TYPE_DEBUG, "Connected to NSE\n");
1877 peer_map = GNUNET_CONTAINER_multipeermap_create (sampler_size_est_need, GNUNET_NO);
1880 /* Initialise cadet */
1881 static const struct GNUNET_CADET_MessageHandler cadet_handlers[] = {
1882 {&handle_peer_push , GNUNET_MESSAGE_TYPE_RPS_PP_PUSH ,
1883 sizeof (struct GNUNET_MessageHeader)},
1884 {&handle_peer_pull_request, GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REQUEST,
1885 sizeof (struct GNUNET_MessageHeader)},
1886 {&handle_peer_pull_reply , GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REPLY , 0},
1890 const uint32_t ports[] = {GNUNET_RPS_CADET_PORT, 0}; // _PORT specified in src/rps/rps.h
1891 cadet_handle = GNUNET_CADET_connect (cfg,
1893 &handle_inbound_channel,
1897 LOG (GNUNET_ERROR_TYPE_DEBUG, "Connected to CADET\n");
1900 /* Initialise sampler */
1901 struct GNUNET_TIME_Relative half_round_interval;
1902 struct GNUNET_TIME_Relative max_round_interval;
1904 half_round_interval = GNUNET_TIME_relative_multiply (round_interval, .5);
1905 max_round_interval = GNUNET_TIME_relative_add (round_interval, half_round_interval);
1907 prot_sampler = RPS_sampler_init (sampler_size_est_need, max_round_interval);
1908 client_sampler = RPS_sampler_init (sampler_size_est_need, max_round_interval);
1910 /* Initialise push and pull maps */
1915 pending_pull_reply_list = NULL;
1916 pending_pull_reply_list_size = 0;
1919 num_hist_update_tasks = 0;
1922 LOG (GNUNET_ERROR_TYPE_DEBUG, "Requesting peers from CADET\n");
1923 GNUNET_CADET_get_peers (cadet_handle, &init_peer_cb, NULL);
1924 // TODO send push/pull to each of those peers?
1932 * The main function for the rps service.
1934 * @param argc number of arguments from the command line
1935 * @param argv command line arguments
1936 * @return 0 ok, 1 on error
1939 main (int argc, char *const *argv)
1941 return (GNUNET_OK ==
1942 GNUNET_SERVICE_run (argc,
1945 GNUNET_SERVICE_OPTION_NONE,
1946 &run, NULL)) ? 0 : 1;
1949 /* end of gnunet-service-rps.c */