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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;
361 * Type of malicious peer
363 * 0 Don't act malicious at all - Default
364 * 1 Try to maximise representation
365 * 2 Try to partition the network
367 uint32_t mal_type = 0;
370 * Other malicious peers
372 static struct GNUNET_PeerIdentity *mal_peers;
375 * Number of other malicious peers
377 static uint32_t num_mal_peers;
380 * If type is 2 this is the attacked peer
382 static struct GNUNET_PeerIdentity attacked_peer;
383 #endif /* ENABLE_MALICIOUS */
386 /***********************************************************************
388 ***********************************************************************/
395 /***********************************************************************
397 ***********************************************************************/
400 * Set a peer flag of given peer context.
402 #define set_peer_flag(peer_ctx, mask) (peer_ctx->peer_flags |= mask)
405 * Get peer flag of given peer context.
407 #define get_peer_flag(peer_ctx, mask) (peer_ctx->peer_flags & mask ? GNUNET_YES : GNUNET_NO)
410 * Unset flag of given peer context.
412 #define unset_peer_flag(peer_ctx, mask) (peer_ctx->peer_flags &= (~mask))
416 * Clean the send channel of a peer
419 peer_clean (const struct GNUNET_PeerIdentity *peer);
423 * Check if peer is already in peer array.
426 in_arr (const struct GNUNET_PeerIdentity *array,
427 unsigned int arr_size,
428 const struct GNUNET_PeerIdentity *peer)
430 GNUNET_assert (NULL != peer);
435 GNUNET_assert (NULL != array);
439 for (i = 0; i < arr_size ; i++)
440 if (0 == GNUNET_CRYPTO_cmp_peer_identity (&array[i], peer))
447 * Print peerlist to log.
450 print_peer_list (struct GNUNET_PeerIdentity *list, unsigned int len)
454 LOG (GNUNET_ERROR_TYPE_DEBUG,
455 "Printing peer list of length %u at %p:\n",
458 for (i = 0 ; i < len ; i++)
460 LOG (GNUNET_ERROR_TYPE_DEBUG,
462 i, GNUNET_i2s (&list[i]));
468 * Remove peer from list.
471 rem_from_list (struct GNUNET_PeerIdentity **peer_list,
472 unsigned int *list_size,
473 const struct GNUNET_PeerIdentity *peer)
476 struct GNUNET_PeerIdentity *tmp;
480 LOG (GNUNET_ERROR_TYPE_DEBUG,
481 "Removing peer %s from list at %p\n",
485 for ( i = 0 ; i < *list_size ; i++ )
487 if (0 == GNUNET_CRYPTO_cmp_peer_identity (&tmp[i], peer))
489 if (i < *list_size -1)
490 { /* Not at the last entry -- shift peers left */
491 memcpy (&tmp[i], &tmp[i +1],
492 ((*list_size) - i -1) * sizeof (struct GNUNET_PeerIdentity));
494 /* Remove last entry (should be now useless PeerID) */
495 GNUNET_array_grow (tmp, *list_size, (*list_size) -1);
502 * Get random peer from the given list but don't return one from the @a ignore_list.
504 struct GNUNET_PeerIdentity *
505 get_rand_peer_ignore_list (const struct GNUNET_PeerIdentity *peer_list,
507 const struct GNUNET_PeerIdentity *ignore_list,
508 uint32_t ignore_size)
512 struct GNUNET_PeerIdentity *tmp_peer_list;
513 struct GNUNET_PeerIdentity *peer;
515 GNUNET_assert (NULL != peer_list);
520 tmp_peer_list = NULL;
521 GNUNET_array_grow (tmp_peer_list, tmp_size, list_size);
522 memcpy (tmp_peer_list,
524 list_size * sizeof (struct GNUNET_PeerIdentity));
525 peer = GNUNET_new (struct GNUNET_PeerIdentity);
528 * Choose the r_index of the peer we want to return
529 * at random from the interval of the gossip list
531 r_index = GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_STRONG,
533 *peer = tmp_peer_list[r_index];
535 while (in_arr (ignore_list, ignore_size, peer))
537 rem_from_list (&tmp_peer_list, &tmp_size, peer);
539 print_peer_list (tmp_peer_list, tmp_size);
548 * Choose the r_index of the peer we want to return
549 * at random from the interval of the gossip list
551 r_index = GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_STRONG,
553 *peer = tmp_peer_list[r_index];
557 GNUNET_array_grow (tmp_peer_list, tmp_size, 0);
564 * Get the context of a peer. If not existing, create.
567 get_peer_ctx (struct GNUNET_CONTAINER_MultiPeerMap *peer_map,
568 const struct GNUNET_PeerIdentity *peer)
570 struct PeerContext *ctx;
572 if ( GNUNET_YES == GNUNET_CONTAINER_multipeermap_contains (peer_map, peer))
574 ctx = GNUNET_CONTAINER_multipeermap_get (peer_map, peer);
578 ctx = GNUNET_new (struct PeerContext);
581 ctx->send_channel = NULL;
582 ctx->recv_channel = NULL;
583 ctx->outstanding_ops = NULL;
584 ctx->num_outstanding_ops = 0;
585 ctx->is_live_task = NULL;
586 ctx->peer_id = *peer;
587 (void) GNUNET_CONTAINER_multipeermap_put (peer_map, peer, ctx,
588 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
595 * Put random peer from sampler into the gossip list as history update.
598 hist_update (void *cls, struct GNUNET_PeerIdentity *ids, uint32_t num_peers)
600 GNUNET_assert (1 == num_peers);
602 if (gossip_list_size < sampler_size_est_need)
603 GNUNET_array_append (gossip_list, gossip_list_size, *ids);
605 if (0 < num_hist_update_tasks)
606 num_hist_update_tasks--;
611 * Set the peer flag to living and call the outstanding operations on this peer.
614 peer_is_live (struct PeerContext *peer_ctx)
616 struct GNUNET_PeerIdentity *peer;
618 peer = &peer_ctx->peer_id;
619 set_peer_flag (peer_ctx, VALID);
621 LOG (GNUNET_ERROR_TYPE_DEBUG, "Peer %s is live\n", GNUNET_i2s (peer));
623 if (0 != peer_ctx->num_outstanding_ops)
624 { /* Call outstanding operations */
627 for (i = 0 ; i < peer_ctx->num_outstanding_ops ; i++)
628 peer_ctx->outstanding_ops[i].op (peer_ctx->outstanding_ops[i].op_cls, peer);
629 GNUNET_array_grow (peer_ctx->outstanding_ops, peer_ctx->num_outstanding_ops, 0);
632 if (NULL != peer_ctx->is_live_task)
634 GNUNET_CADET_notify_transmit_ready_cancel (peer_ctx->is_live_task);
635 peer_ctx->is_live_task = NULL;
643 * Callback that is called when a channel was effectively established.
644 * This is given to ntfy_tmt_rdy and called when the channel was
645 * successfully established.
648 cadet_ntfy_tmt_rdy_cb (void *cls, size_t size, void *buf)
650 struct PeerContext *peer_ctx = (struct PeerContext *) cls;
655 peer_ctx->is_live_task = NULL;
656 peer_is_live (peer_ctx);
659 //if (NULL != peer_ctx->is_live_task)
661 // LOG (GNUNET_ERROR_TYPE_DEBUG,
662 // "Trying to cancle is_live_task for peer %s\n",
663 // GNUNET_i2s (&peer_ctx->peer_id));
664 // GNUNET_CADET_notify_transmit_ready_cancel (peer_ctx->is_live_task);
665 // peer_ctx->is_live_task = NULL;
673 * Get the channel of a peer. If not existing, create.
675 struct GNUNET_CADET_Channel *
676 get_channel (struct GNUNET_CONTAINER_MultiPeerMap *peer_map,
677 const struct GNUNET_PeerIdentity *peer)
679 struct PeerContext *peer_ctx;
681 peer_ctx = get_peer_ctx (peer_map, peer);
682 if (NULL == peer_ctx->send_channel)
684 LOG (GNUNET_ERROR_TYPE_DEBUG,
685 "Trying to establish channel to peer %s\n",
688 peer_ctx->send_channel =
689 GNUNET_CADET_channel_create (cadet_handle,
692 GNUNET_RPS_CADET_PORT,
693 GNUNET_CADET_OPTION_RELIABLE);
695 // do I have to explicitly put it in the peer_map?
696 (void) GNUNET_CONTAINER_multipeermap_put
700 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
702 return peer_ctx->send_channel;
707 * Get the message queue of a specific peer.
709 * If we already have a message queue open to this client,
710 * simply return it, otherways create one.
712 struct GNUNET_MQ_Handle *
713 get_mq (struct GNUNET_CONTAINER_MultiPeerMap *peer_map,
714 const struct GNUNET_PeerIdentity *peer_id)
716 struct PeerContext *peer_ctx;
718 peer_ctx = get_peer_ctx (peer_map, peer_id);
720 if (NULL == peer_ctx->mq)
722 (void) get_channel (peer_map, peer_id);
723 peer_ctx->mq = GNUNET_CADET_mq_create (peer_ctx->send_channel);
724 //do I have to explicitly put it in the peer_map?
725 (void) GNUNET_CONTAINER_multipeermap_put (peer_map, peer_id, peer_ctx,
726 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
733 * Issue check whether peer is live
735 * @param peer_ctx the context of the peer
738 check_peer_live (struct PeerContext *peer_ctx)
740 (void) get_channel (peer_map, &peer_ctx->peer_id);
741 LOG (GNUNET_ERROR_TYPE_DEBUG,
742 "Get informed about peer %s getting live\n",
743 GNUNET_i2s (&peer_ctx->peer_id));
744 peer_ctx->is_live_task =
745 GNUNET_CADET_notify_transmit_ready (peer_ctx->send_channel,
747 GNUNET_TIME_UNIT_FOREVER_REL,
748 sizeof (struct GNUNET_MessageHeader),
749 cadet_ntfy_tmt_rdy_cb,
751 // FIXME check whether this is NULL
756 * Sum all time relatives of an array.
758 struct GNUNET_TIME_Relative
759 T_relative_sum (const struct GNUNET_TIME_Relative *rel_array, uint32_t arr_size)
761 struct GNUNET_TIME_Relative sum;
764 sum = GNUNET_TIME_UNIT_ZERO;
765 for ( i = 0 ; i < arr_size ; i++ )
767 sum = GNUNET_TIME_relative_add (sum, rel_array[i]);
774 * Compute the average of given time relatives.
776 struct GNUNET_TIME_Relative
777 T_relative_avg (const struct GNUNET_TIME_Relative *rel_array, uint32_t arr_size)
779 return GNUNET_TIME_relative_divide (T_relative_sum (rel_array, arr_size), arr_size);
784 * Insert PeerID in #pull_list
786 * Called once we know a peer is live.
789 insert_in_pull_list (void *cls, const struct GNUNET_PeerIdentity *peer)
791 if (GNUNET_NO == in_arr (pull_list, pull_list_size, peer))
792 GNUNET_array_append (pull_list, pull_list_size, *peer);
798 * Check whether #insert_in_pull_list was already scheduled
801 insert_in_pull_list_scheduled (const struct PeerContext *peer_ctx)
805 for ( i = 0 ; i < peer_ctx->num_outstanding_ops ; i++ )
806 if (insert_in_pull_list == peer_ctx->outstanding_ops[i].op)
813 * Insert PeerID in #gossip_list
815 * Called once we know a peer is live.
818 insert_in_gossip_list (void *cls, const struct GNUNET_PeerIdentity *peer)
820 if (GNUNET_NO == in_arr (gossip_list, gossip_list_size, peer))
821 GNUNET_array_append (gossip_list, gossip_list_size, *peer);
823 (void) get_channel (peer_map, peer);
827 * Check whether #insert_in_gossip_list was already scheduled
830 insert_in_gossip_list_scheduled (const struct PeerContext *peer_ctx)
834 for ( i = 0 ; i < peer_ctx->num_outstanding_ops ; i++ )
835 if (insert_in_gossip_list == peer_ctx->outstanding_ops[i].op)
842 * Update sampler with given PeerID.
845 insert_in_sampler (void *cls, const struct GNUNET_PeerIdentity *peer)
847 LOG (GNUNET_ERROR_TYPE_DEBUG,
848 "Updating samplers with peer %s from insert_in_sampler()\n",
850 RPS_sampler_update (prot_sampler, peer);
851 RPS_sampler_update (client_sampler, peer);
856 * Check whether #insert_in_sampler was already scheduled
859 insert_in_sampler_scheduled (const struct PeerContext *peer_ctx)
863 for ( i = 0 ; i < peer_ctx->num_outstanding_ops ; i++ )
864 if (insert_in_sampler== peer_ctx->outstanding_ops[i].op)
871 * Wrapper around #RPS_sampler_resize()
873 * If we do not have enough sampler elements, double current sampler size
874 * If we have more than enough sampler elements, halv current sampler size
877 resize_wrapper (struct RPS_Sampler *sampler, uint32_t new_size)
879 unsigned int sampler_size;
882 // TODO respect the min, max
883 sampler_size = RPS_sampler_get_size (sampler);
884 if (sampler_size > new_size * 4)
886 RPS_sampler_resize (sampler, sampler_size / 2);
888 else if (sampler_size < new_size)
890 RPS_sampler_resize (sampler, sampler_size * 2);
892 LOG (GNUNET_ERROR_TYPE_DEBUG, "sampler_size is now %u\n", sampler_size);
897 * Wrapper around #RPS_sampler_resize() resizing the client sampler
900 client_resize_wrapper ()
902 uint32_t bigger_size;
903 unsigned int sampler_size;
907 sampler_size = RPS_sampler_get_size (client_sampler);
909 if (sampler_size_est_need > sampler_size_client_need)
910 bigger_size = sampler_size_est_need;
912 bigger_size = sampler_size_client_need;
914 // TODO respect the min, max
915 resize_wrapper (client_sampler, bigger_size);
916 LOG (GNUNET_ERROR_TYPE_DEBUG, "sampler_size is now %u\n", sampler_size);
921 * Estimate request rate
923 * Called every time we receive a request from the client.
928 struct GNUNET_TIME_Relative max_round_duration;
930 if (request_deltas_size > req_counter)
932 if ( 1 < req_counter)
934 /* Shift last request deltas to the right */
935 memcpy (&request_deltas[1],
937 (req_counter - 1) * sizeof (struct GNUNET_TIME_Relative));
939 /* Add current delta to beginning */
941 GNUNET_TIME_absolute_get_difference (last_request,
942 GNUNET_TIME_absolute_get ());
943 request_rate = T_relative_avg (request_deltas, req_counter);
945 /* Compute the duration a round will maximally take */
947 GNUNET_TIME_relative_add (round_interval,
948 GNUNET_TIME_relative_divide (round_interval, 2));
950 /* Set the estimated size the sampler has to have to
951 * satisfy the current client request rate */
952 sampler_size_client_need =
953 max_round_duration.rel_value_us / request_rate.rel_value_us;
955 /* Resize the sampler */
956 client_resize_wrapper ();
958 last_request = GNUNET_TIME_absolute_get ();
962 /***********************************************************************
964 ***********************************************************************/
971 * Function called by NSE.
973 * Updates sizes of sampler list and gossip list and adapt those lists
977 nse_callback (void *cls, struct GNUNET_TIME_Absolute timestamp,
978 double logestimate, double std_dev)
981 //double scale; // TODO this might go gloabal/config
983 LOG (GNUNET_ERROR_TYPE_DEBUG,
984 "Received a ns estimate - logest: %f, std_dev: %f (old_size: %u)\n",
985 logestimate, std_dev, RPS_sampler_get_size (prot_sampler));
987 estimate = GNUNET_NSE_log_estimate_to_n (logestimate);
988 // GNUNET_NSE_log_estimate_to_n (logestimate);
989 estimate = pow (estimate, 1.0 / 3);
990 // TODO add if std_dev is a number
991 // estimate += (std_dev * scale);
992 if (2 < ceil (estimate))
994 LOG (GNUNET_ERROR_TYPE_DEBUG, "Changing estimate to %f\n", estimate);
995 sampler_size_est_need = estimate;
997 LOG (GNUNET_ERROR_TYPE_DEBUG, "Not using estimate %f\n", estimate);
999 /* If the NSE has changed adapt the lists accordingly */
1000 resize_wrapper (prot_sampler, sampler_size_est_need);
1001 client_resize_wrapper ();
1006 * Callback called once the requested PeerIDs are ready.
1008 * Sends those to the requesting client.
1010 void client_respond (void *cls,
1011 struct GNUNET_PeerIdentity *ids, uint32_t num_peers)
1013 LOG (GNUNET_ERROR_TYPE_DEBUG, "sampler returned %" PRIX32 " peers\n", num_peers);
1014 struct GNUNET_MQ_Envelope *ev;
1015 struct GNUNET_RPS_CS_ReplyMessage *out_msg;
1016 struct GNUNET_SERVER_Client *client;
1017 uint32_t size_needed;
1018 struct client_ctx *cli_ctx;
1020 client = (struct GNUNET_SERVER_Client *) cls;
1022 size_needed = sizeof (struct GNUNET_RPS_CS_ReplyMessage) +
1023 num_peers * sizeof (struct GNUNET_PeerIdentity);
1025 GNUNET_assert (GNUNET_SERVER_MAX_MESSAGE_SIZE >= size_needed);
1027 ev = GNUNET_MQ_msg_extra (out_msg,
1028 num_peers * sizeof (struct GNUNET_PeerIdentity),
1029 GNUNET_MESSAGE_TYPE_RPS_CS_REPLY);
1030 out_msg->num_peers = htonl (num_peers);
1032 memcpy (&out_msg[1],
1034 num_peers * sizeof (struct GNUNET_PeerIdentity));
1037 cli_ctx = GNUNET_SERVER_client_get_user_context (client, struct client_ctx);
1038 if ( NULL == cli_ctx ) {
1039 cli_ctx = GNUNET_new (struct client_ctx);
1040 cli_ctx->mq = GNUNET_MQ_queue_for_server_client (client);
1041 GNUNET_SERVER_client_set_user_context (client, cli_ctx);
1044 GNUNET_MQ_send (cli_ctx->mq, ev);
1049 * Handle RPS request from the client.
1051 * @param cls closure
1052 * @param client identification of the client
1053 * @param message the actual message
1056 handle_client_request (void *cls,
1057 struct GNUNET_SERVER_Client *client,
1058 const struct GNUNET_MessageHeader *message)
1060 struct GNUNET_RPS_CS_RequestMessage *msg;
1062 uint32_t size_needed;
1065 msg = (struct GNUNET_RPS_CS_RequestMessage *) message;
1067 num_peers = ntohl (msg->num_peers);
1068 size_needed = sizeof (struct GNUNET_RPS_CS_RequestMessage) +
1069 num_peers * sizeof (struct GNUNET_PeerIdentity);
1071 if (GNUNET_SERVER_MAX_MESSAGE_SIZE < size_needed)
1073 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
1077 for (i = 0 ; i < num_peers ; i++)
1080 LOG (GNUNET_ERROR_TYPE_DEBUG, "Client requested %" PRIX32 " random peer(s).\n", num_peers);
1082 RPS_sampler_get_n_rand_peers (client_sampler, client_respond,
1083 client, num_peers, GNUNET_YES);
1085 GNUNET_SERVER_receive_done (client,
1091 * Handle seed from the client.
1093 * @param cls closure
1094 * @param client identification of the client
1095 * @param message the actual message
1098 handle_client_seed (void *cls,
1099 struct GNUNET_SERVER_Client *client,
1100 const struct GNUNET_MessageHeader *message)
1102 struct GNUNET_RPS_CS_SeedMessage *in_msg;
1103 struct GNUNET_PeerIdentity *peers;
1107 if (sizeof (struct GNUNET_RPS_CS_SeedMessage) > ntohs (message->size))
1109 GNUNET_break_op (0);
1110 GNUNET_SERVER_receive_done (client,
1114 in_msg = (struct GNUNET_RPS_CS_SeedMessage *) message;
1115 num_peers = ntohl (in_msg->num_peers);
1116 peers = (struct GNUNET_PeerIdentity *) &in_msg[1];
1117 //peers = GNUNET_new_array (num_peers, struct GNUNET_PeerIdentity);
1118 //memcpy (peers, &in_msg[1], num_peers * sizeof (struct GNUNET_PeerIdentity));
1120 if ((ntohs (message->size) - sizeof (struct GNUNET_RPS_CS_SeedMessage)) /
1121 sizeof (struct GNUNET_PeerIdentity) != num_peers)
1123 GNUNET_break_op (0);
1124 GNUNET_SERVER_receive_done (client,
1128 LOG (GNUNET_ERROR_TYPE_DEBUG,
1129 "Client seeded peers:\n");
1130 print_peer_list (peers, num_peers);
1132 // TODO check for validity of ids
1134 for (i = 0 ; i < num_peers ; i++)
1136 LOG (GNUNET_ERROR_TYPE_DEBUG,
1137 "Updating samplers with seed %" PRIX32 ": %s\n",
1139 GNUNET_i2s (&peers[i]));
1141 RPS_sampler_update (prot_sampler, &peers[i]);
1142 RPS_sampler_update (client_sampler, &peers[i]);
1145 //GNUNET_free (peers);
1147 GNUNET_SERVER_receive_done (client,
1153 * Handle a PUSH message from another peer.
1155 * Check the proof of work and store the PeerID
1156 * in the temporary list for pushed PeerIDs.
1158 * @param cls Closure
1159 * @param channel The channel the PUSH was received over
1160 * @param channel_ctx The context associated with this channel
1161 * @param msg The message header
1164 handle_peer_push (void *cls,
1165 struct GNUNET_CADET_Channel *channel,
1167 const struct GNUNET_MessageHeader *msg)
1169 const struct GNUNET_PeerIdentity *peer;
1171 // (check the proof of work)
1173 peer = (const struct GNUNET_PeerIdentity *) GNUNET_CADET_channel_get_info (channel, GNUNET_CADET_OPTION_PEER);
1174 // FIXME wait for cadet to change this function
1175 LOG (GNUNET_ERROR_TYPE_DEBUG, "PUSH received (%s)\n", GNUNET_i2s (peer));
1177 /* Add the sending peer to the push_list */
1178 if (GNUNET_NO == in_arr (push_list, push_list_size, peer))
1179 GNUNET_array_append (push_list, push_list_size, *peer);
1185 * Handle PULL REQUEST request message from another peer.
1187 * Reply with the gossip list of PeerIDs.
1189 * @param cls Closure
1190 * @param channel The channel the PUSH was received over
1191 * @param channel_ctx The context associated with this channel
1192 * @param msg The message header
1195 handle_peer_pull_request (void *cls,
1196 struct GNUNET_CADET_Channel *channel,
1198 const struct GNUNET_MessageHeader *msg)
1200 struct GNUNET_PeerIdentity *peer;
1202 struct GNUNET_MQ_Handle *mq;
1203 struct GNUNET_MQ_Envelope *ev;
1204 struct GNUNET_RPS_P2P_PullReplyMessage *out_msg;
1207 peer = (struct GNUNET_PeerIdentity *) GNUNET_CADET_channel_get_info (channel,
1208 GNUNET_CADET_OPTION_PEER);
1209 // FIXME wait for cadet to change this function
1211 /* Compute actual size */
1212 send_size = sizeof (struct GNUNET_RPS_P2P_PullReplyMessage) +
1213 gossip_list_size * sizeof (struct GNUNET_PeerIdentity);
1215 if (GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE < send_size)
1216 /* Compute number of peers to send
1217 * If too long, simply truncate */
1219 (GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE -
1220 sizeof (struct GNUNET_RPS_P2P_PullReplyMessage)) /
1221 sizeof (struct GNUNET_PeerIdentity);
1223 send_size = gossip_list_size;
1225 LOG (GNUNET_ERROR_TYPE_DEBUG,
1226 "PULL REQUEST from peer %s received, going to send %u peers\n",
1227 GNUNET_i2s (peer), send_size);
1229 mq = get_mq (peer_map, peer);
1231 ev = GNUNET_MQ_msg_extra (out_msg,
1232 send_size * sizeof (struct GNUNET_PeerIdentity),
1233 GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REPLY);
1234 //out_msg->num_peers = htonl (gossip_list_size);
1235 out_msg->num_peers = htonl (send_size);
1236 memcpy (&out_msg[1], gossip_list,
1237 send_size * sizeof (struct GNUNET_PeerIdentity));
1239 GNUNET_MQ_send (mq, ev);
1246 * Handle PULL REPLY message from another peer.
1248 * Check whether we sent a corresponding request and
1249 * whether this reply is the first one.
1251 * @param cls Closure
1252 * @param channel The channel the PUSH was received over
1253 * @param channel_ctx The context associated with this channel
1254 * @param msg The message header
1257 handle_peer_pull_reply (void *cls,
1258 struct GNUNET_CADET_Channel *channel,
1260 const struct GNUNET_MessageHeader *msg)
1262 LOG (GNUNET_ERROR_TYPE_DEBUG, "PULL REPLY received\n");
1264 struct GNUNET_RPS_P2P_PullReplyMessage *in_msg;
1265 struct GNUNET_PeerIdentity *peers;
1266 struct PeerContext *peer_ctx;
1267 struct GNUNET_PeerIdentity *sender;
1268 struct PeerContext *sender_ctx;
1269 struct PeerOutstandingOp out_op;
1272 /* Check for protocol violation */
1273 if (sizeof (struct GNUNET_RPS_P2P_PullReplyMessage) > ntohs (msg->size))
1275 GNUNET_break_op (0);
1276 return GNUNET_SYSERR;
1279 in_msg = (struct GNUNET_RPS_P2P_PullReplyMessage *) msg;
1280 if ((ntohs (msg->size) - sizeof (struct GNUNET_RPS_P2P_PullReplyMessage)) /
1281 sizeof (struct GNUNET_PeerIdentity) != ntohl (in_msg->num_peers))
1283 LOG (GNUNET_ERROR_TYPE_ERROR,
1284 "message says it sends %" PRIu64 " peers, have space for %i peers\n",
1285 ntohl (in_msg->num_peers),
1286 (ntohs (msg->size) - sizeof (struct GNUNET_RPS_P2P_PullReplyMessage)) /
1287 sizeof (struct GNUNET_PeerIdentity));
1288 GNUNET_break_op (0);
1289 return GNUNET_SYSERR;
1292 sender = (struct GNUNET_PeerIdentity *) GNUNET_CADET_channel_get_info (
1293 (struct GNUNET_CADET_Channel *) channel, GNUNET_CADET_OPTION_PEER);
1294 // Guess simply casting isn't the nicest way...
1295 // FIXME wait for cadet to change this function
1296 sender_ctx = get_peer_ctx (peer_map, sender);
1298 if (GNUNET_YES == get_peer_flag (sender_ctx, PULL_REPLY_PENDING))
1300 GNUNET_break_op (0);
1304 /* Do actual logic */
1305 peers = (struct GNUNET_PeerIdentity *) &msg[1];
1306 for (i = 0 ; i < ntohl (in_msg->num_peers) ; i++)
1308 peer_ctx = get_peer_ctx (peer_map, &peers[i]);
1309 if (GNUNET_YES == get_peer_flag (peer_ctx, VALID)
1310 || NULL != peer_ctx->send_channel
1311 || NULL != peer_ctx->recv_channel)
1313 if (GNUNET_NO == in_arr (pull_list, pull_list_size, &peers[i])
1314 && 0 != GNUNET_CRYPTO_cmp_peer_identity (&own_identity, &peers[i]))
1315 GNUNET_array_append (pull_list, pull_list_size, peers[i]);
1317 else if (GNUNET_NO == insert_in_pull_list_scheduled (peer_ctx))
1319 out_op.op = insert_in_pull_list;
1320 out_op.op_cls = NULL;
1321 GNUNET_array_append (peer_ctx->outstanding_ops,
1322 peer_ctx->num_outstanding_ops,
1324 check_peer_live (peer_ctx);
1328 unset_peer_flag (sender_ctx, PULL_REPLY_PENDING);
1329 rem_from_list (&pending_pull_reply_list, &pending_pull_reply_list_size, sender);
1335 #if ENABLE_MALICIOUS
1337 * Turn RPS service to act malicious.
1339 * @param cls Closure
1340 * @param channel The channel the PUSH was received over
1341 * @param channel_ctx The context associated with this channel
1342 * @param msg The message header
1345 handle_peer_act_malicious (void *cls,
1346 struct GNUNET_CADET_Channel *channel,
1348 const struct GNUNET_MessageHeader *msg)
1350 struct GNUNET_RPS_CS_ActMaliciousMessage *in_msg;
1351 struct GNUNET_PeerIdentity *sender;
1352 struct PeerContext *sender_ctx;
1353 struct GNUNET_PeerIdentity *peers;
1355 /* Check for protocol violation */
1356 if (sizeof (struct GNUNET_RPS_CS_ActMaliciousMessage) > ntohs (msg->size))
1358 GNUNET_break_op (0);
1359 return GNUNET_SYSERR;
1362 in_msg = (struct GNUNET_RPS_CS_ActMaliciousMessage *) msg;
1363 if ((ntohs (msg->size) - sizeof (struct GNUNET_RPS_CS_ActMaliciousMessage)) /
1364 sizeof (struct GNUNET_PeerIdentity) != ntohl (in_msg->num_peers))
1366 LOG (GNUNET_ERROR_TYPE_ERROR,
1367 "message says it sends %" PRIu64 " peers, have space for %i peers\n",
1368 ntohl (in_msg->num_peers),
1369 (ntohs (msg->size) - sizeof (struct GNUNET_RPS_CS_ActMaliciousMessage)) /
1370 sizeof (struct GNUNET_PeerIdentity));
1371 GNUNET_break_op (0);
1372 return GNUNET_SYSERR;
1375 sender = (struct GNUNET_PeerIdentity *) GNUNET_CADET_channel_get_info (
1376 (struct GNUNET_CADET_Channel *) channel, GNUNET_CADET_OPTION_PEER);
1377 // Guess simply casting isn't the nicest way...
1378 // FIXME wait for cadet to change this function
1379 sender_ctx = get_peer_ctx (peer_map, sender);
1381 if (GNUNET_YES == get_peer_flag (sender_ctx, PULL_REPLY_PENDING))
1383 GNUNET_break_op (0);
1388 /* Do actual logic */
1389 peers = (struct GNUNET_PeerIdentity *) &msg[1];
1390 num_mal_peers = ntohl (in_msg->num_peers);
1391 mal_type = ntohl (in_msg->type);
1393 LOG (GNUNET_ERROR_TYPE_DEBUG,
1394 "Now acting malicious type %" PRIX32 "\n",
1398 { /* Try to maximise representation */
1399 num_mal_peers = ntohl (in_msg->num_peers);
1400 mal_peers = GNUNET_new_array (num_mal_peers,
1401 struct GNUNET_PeerIdentity);
1402 memcpy (mal_peers, peers, num_mal_peers);
1404 /* Substitute do_round () with do_mal_round () */
1405 GNUNET_SCHEDULER_cancel (do_round_task);
1406 do_round_task = GNUNET_SCHEDULER_add_now (&do_mal_round, NULL);
1408 else if (2 == mal_type)
1409 { /* Try to partition the network */
1410 num_mal_peers = ntohl (in_msg->num_peers) - 1;
1411 mal_peers = GNUNET_new_array (num_mal_peers,
1412 struct GNUNET_PeerIdentity);
1413 memcpy (mal_peers, peers, num_mal_peers);
1414 attacked_peer = peers[num_mal_peers];
1416 /* Substitute do_round () with do_mal_round () */
1417 GNUNET_SCHEDULER_cancel (do_round_task);
1418 do_round_task = GNUNET_SCHEDULER_add_now (&do_mal_round, NULL);
1420 else if (0 == mal_type)
1421 { /* Stop acting malicious */
1423 GNUNET_free (mal_peers);
1425 /* Substitute do_mal_round () with do_round () */
1426 GNUNET_SCHEDULER_cancel (do_round_task);
1427 do_round_task = GNUNET_SCHEDULER_add_now (&do_round, NULL);
1439 * Send out PUSHes and PULLs maliciously.
1441 * This is executed regylary.
1444 do_mal_round (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1446 LOG (GNUNET_ERROR_TYPE_DEBUG, "Going to execute next round maliciously.\n");
1450 /* Compute random time value between .5 * round_interval and 1.5 *round_interval */
1451 half_round_interval = GNUNET_TIME_relative_divide (round_interval, 2);
1455 * Compute random value between (0 and 1) * round_interval
1456 * via multiplying round_interval with a 'fraction' (0 to value)/value
1458 rand_delay = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, UINT_MAX/10);
1459 time_next_round = GNUNET_TIME_relative_multiply (round_interval, rand_delay);
1460 time_next_round = GNUNET_TIME_relative_divide (time_next_round, UINT_MAX/10);
1461 time_next_round = GNUNET_TIME_relative_add (time_next_round, half_round_interval);
1462 } while (GNUNET_TIME_UNIT_FOREVER_REL.rel_value_us == time_next_round.rel_value_us);
1464 /* Schedule next round */
1465 do_round_task = GNUNET_SCHEDULER_add_delayed (round_interval, &do_mal_round, NULL);
1466 LOG (GNUNET_ERROR_TYPE_DEBUG, "Finished round\n");
1468 #endif /* ENABLE_MALICIOUS */
1472 * Send out PUSHes and PULLs, possibly update #gossip_list, samplers.
1474 * This is executed regylary.
1477 do_round (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1479 LOG (GNUNET_ERROR_TYPE_DEBUG, "Going to execute next round.\n");
1482 unsigned int *permut;
1483 unsigned int n_peers; /* Number of peers we send pushes/pulls to */
1484 struct GNUNET_MQ_Envelope *ev;
1485 struct GNUNET_PeerIdentity peer;
1486 struct GNUNET_PeerIdentity *tmp_peer;
1487 struct GNUNET_MQ_Handle *mq;
1489 LOG (GNUNET_ERROR_TYPE_DEBUG,
1490 "Printing gossip list:\n");
1491 for (i = 0 ; i < gossip_list_size ; i++)
1492 LOG (GNUNET_ERROR_TYPE_DEBUG,
1493 "\t%s\n", GNUNET_i2s (&gossip_list[i]));
1494 // TODO log lists, ...
1496 /* Would it make sense to have one shuffeled gossip list and then
1497 * to send PUSHes to first alpha peers, PULL requests to next beta peers and
1498 * use the rest to update sampler?
1499 * in essence get random peers with consumption */
1502 if (0 < gossip_list_size)
1504 permut = GNUNET_CRYPTO_random_permute (GNUNET_CRYPTO_QUALITY_STRONG,
1505 (unsigned int) gossip_list_size);
1506 n_peers = ceil (alpha * gossip_list_size);
1507 LOG (GNUNET_ERROR_TYPE_DEBUG,
1508 "Going to send pushes to %u ceil (%f * %u) peers.\n",
1509 n_peers, alpha, gossip_list_size);
1510 for (i = 0 ; i < n_peers ; i++)
1512 peer = gossip_list[permut[i]];
1513 if (0 != GNUNET_CRYPTO_cmp_peer_identity (&own_identity, &peer)) // TODO
1514 { // FIXME if this fails schedule/loop this for later
1515 LOG (GNUNET_ERROR_TYPE_DEBUG,
1516 "Sending PUSH to peer %s of gossiped list.\n",
1517 GNUNET_i2s (&peer));
1519 ev = GNUNET_MQ_msg_header (GNUNET_MESSAGE_TYPE_RPS_PP_PUSH);
1520 mq = get_mq (peer_map, &peer);
1521 GNUNET_MQ_send (mq, ev);
1524 GNUNET_free (permut);
1528 /* Send PULL requests */
1529 //permut = GNUNET_CRYPTO_random_permute (GNUNET_CRYPTO_QUALITY_STRONG, (unsigned int) sampler_list->size);
1530 n_peers = ceil (beta * gossip_list_size);
1531 LOG (GNUNET_ERROR_TYPE_DEBUG,
1532 "Going to send pulls to %u ceil (%f * %u) peers.\n",
1533 n_peers, beta, gossip_list_size);
1534 for (i = 0 ; i < n_peers ; i++)
1536 tmp_peer = get_rand_peer_ignore_list (gossip_list, gossip_list_size,
1537 pending_pull_reply_list, pending_pull_reply_list_size);
1538 if (NULL != tmp_peer)
1541 GNUNET_free (tmp_peer);
1543 GNUNET_array_append (pending_pull_reply_list, pending_pull_reply_list_size, peer);
1545 if (0 != GNUNET_CRYPTO_cmp_peer_identity (&own_identity, &peer))
1546 { // FIXME if this fails schedule/loop this for later
1547 LOG (GNUNET_ERROR_TYPE_DEBUG,
1548 "Sending PULL request to peer %s of gossiped list.\n",
1549 GNUNET_i2s (&peer));
1551 ev = GNUNET_MQ_msg_header (GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REQUEST);
1552 mq = get_mq (peer_map, &peer);
1553 GNUNET_MQ_send (mq, ev);
1559 /* Update gossip list */
1561 if ( push_list_size <= alpha * gossip_list_size &&
1562 push_list_size != 0 &&
1563 pull_list_size != 0 )
1565 LOG (GNUNET_ERROR_TYPE_DEBUG, "Update of the gossip list.\n");
1567 uint32_t first_border;
1568 uint32_t second_border;
1570 uint32_t peers_to_clean_size;
1571 struct GNUNET_PeerIdentity *peers_to_clean;
1573 peers_to_clean = NULL;
1574 peers_to_clean_size = 0;
1575 GNUNET_array_grow (peers_to_clean, peers_to_clean_size, gossip_list_size);
1576 memcpy (peers_to_clean,
1578 gossip_list_size * sizeof (struct GNUNET_PeerIdentity));
1580 first_border = ceil (alpha * sampler_size_est_need);
1581 second_border = first_border + ceil (beta * sampler_size_est_need);
1583 GNUNET_array_grow (gossip_list, gossip_list_size, second_border);
1585 for (i = 0 ; i < first_border ; i++)
1586 { // TODO use RPS_sampler_get_n_rand_peers
1587 /* Update gossip list with peers received through PUSHes */
1588 r_index = GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_STRONG,
1590 gossip_list[i] = push_list[r_index];
1591 // TODO change the peer_flags accordingly
1594 for (i = first_border ; i < second_border ; i++)
1596 /* Update gossip list with peers received through PULLs */
1597 r_index = GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_STRONG,
1599 gossip_list[i] = pull_list[r_index];
1600 // TODO change the peer_flags accordingly
1603 for (i = second_border ; i < sampler_size_est_need ; i++)
1605 /* Update gossip list with peers from history */
1606 RPS_sampler_get_n_rand_peers (prot_sampler, hist_update, NULL, 1, GNUNET_NO);
1607 num_hist_update_tasks++;
1608 // TODO change the peer_flags accordingly
1611 for (i = 0 ; i < gossip_list_size ; i++)
1612 rem_from_list (&peers_to_clean, &peers_to_clean_size, &gossip_list[i]);
1614 for (i = 0 ; i < peers_to_clean_size ; i++)
1615 peer_clean (&peers_to_clean[i]);
1617 GNUNET_free (peers_to_clean);
1621 LOG (GNUNET_ERROR_TYPE_DEBUG, "No update of the gossip list.\n");
1623 // TODO independent of that also get some peers from CADET_get_peers()?
1626 /* Update samplers */
1627 for ( i = 0 ; i < push_list_size ; i++ )
1629 LOG (GNUNET_ERROR_TYPE_DEBUG,
1630 "Updating with peer %s from push list\n",
1631 GNUNET_i2s (&push_list[i]));
1632 RPS_sampler_update (prot_sampler, &push_list[i]);
1633 RPS_sampler_update (client_sampler, &push_list[i]);
1634 // TODO set in_flag?
1637 for ( i = 0 ; i < pull_list_size ; i++ )
1639 LOG (GNUNET_ERROR_TYPE_DEBUG,
1640 "Updating with peer %s from pull list\n",
1641 GNUNET_i2s (&pull_list[i]));
1642 RPS_sampler_update (prot_sampler, &push_list[i]);
1643 RPS_sampler_update (client_sampler, &push_list[i]);
1644 // TODO set in_flag?
1648 /* Empty push/pull lists */
1649 GNUNET_array_grow (push_list, push_list_size, 0);
1650 GNUNET_array_grow (pull_list, pull_list_size, 0);
1652 struct GNUNET_TIME_Relative time_next_round;
1653 struct GNUNET_TIME_Relative half_round_interval;
1654 unsigned int rand_delay;
1657 /* Compute random time value between .5 * round_interval and 1.5 *round_interval */
1658 half_round_interval = GNUNET_TIME_relative_divide (round_interval, 2);
1662 * Compute random value between (0 and 1) * round_interval
1663 * via multiplying round_interval with a 'fraction' (0 to value)/value
1665 rand_delay = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, UINT_MAX/10);
1666 time_next_round = GNUNET_TIME_relative_multiply (round_interval, rand_delay);
1667 time_next_round = GNUNET_TIME_relative_divide (time_next_round, UINT_MAX/10);
1668 time_next_round = GNUNET_TIME_relative_add (time_next_round, half_round_interval);
1669 } while (GNUNET_TIME_UNIT_FOREVER_REL.rel_value_us == time_next_round.rel_value_us);
1671 /* Schedule next round */
1672 do_round_task = GNUNET_SCHEDULER_add_delayed (round_interval, &do_round, NULL);
1673 LOG (GNUNET_ERROR_TYPE_DEBUG, "Finished round\n");
1678 rps_start (struct GNUNET_SERVER_Handle *server);
1682 * This is called from GNUNET_CADET_get_peers().
1684 * It is called on every peer(ID) that cadet somehow has contact with.
1685 * We use those to initialise the sampler.
1688 init_peer_cb (void *cls,
1689 const struct GNUNET_PeerIdentity *peer,
1690 int tunnel, // "Do we have a tunnel towards this peer?"
1691 unsigned int n_paths, // "Number of known paths towards this peer"
1692 unsigned int best_path) // "How long is the best path?
1693 // (0 = unknown, 1 = ourselves, 2 = neighbor)"
1695 struct PeerOutstandingOp out_op;
1696 struct PeerContext *peer_ctx;
1699 && 0 != GNUNET_CRYPTO_cmp_peer_identity (&own_identity, peer))
1701 LOG (GNUNET_ERROR_TYPE_DEBUG,
1702 "Got peer %s (at %p) from CADET (gossip_list_size: %u)\n",
1703 GNUNET_i2s (peer), peer, gossip_list_size);
1705 // maybe create a function for that
1706 peer_ctx = get_peer_ctx (peer_map, peer);
1707 if (GNUNET_YES != get_peer_flag (peer_ctx, VALID))
1709 if (GNUNET_NO == insert_in_sampler_scheduled (peer_ctx))
1711 out_op.op = insert_in_sampler;
1712 out_op.op_cls = NULL;
1713 GNUNET_array_append (peer_ctx->outstanding_ops,
1714 peer_ctx->num_outstanding_ops,
1718 if (GNUNET_NO == insert_in_gossip_list_scheduled (peer_ctx))
1720 out_op.op = insert_in_gossip_list;
1721 out_op.op_cls = NULL;
1722 GNUNET_array_append (peer_ctx->outstanding_ops,
1723 peer_ctx->num_outstanding_ops,
1727 /* Trigger livelyness test on peer */
1728 check_peer_live (peer_ctx);
1731 // send push/pull to each of those peers?
1737 * Clean the send channel of a peer
1740 peer_clean (const struct GNUNET_PeerIdentity *peer)
1742 struct PeerContext *peer_ctx;
1743 struct GNUNET_CADET_Channel *channel;
1745 if (GNUNET_YES != in_arr (gossip_list, gossip_list_size, peer)
1746 && GNUNET_YES == GNUNET_CONTAINER_multipeermap_contains (peer_map, peer))
1748 peer_ctx = get_peer_ctx (peer_map, peer);
1749 if (NULL != peer_ctx->send_channel)
1751 channel = peer_ctx->send_channel;
1752 peer_ctx->send_channel = NULL;
1753 GNUNET_CADET_channel_destroy (channel);
1760 * Callback used to remove peers from the multipeermap.
1763 peer_remove_cb (void *cls, const struct GNUNET_PeerIdentity *key, void *value)
1765 struct PeerContext *peer_ctx;
1766 const struct GNUNET_CADET_Channel *channel =
1767 (const struct GNUNET_CADET_Channel *) cls;
1768 struct GNUNET_CADET_Channel *recv;
1769 struct GNUNET_CADET_Channel *send;
1771 if (GNUNET_YES == GNUNET_CONTAINER_multipeermap_contains (peer_map, value))
1773 peer_ctx = (struct PeerContext *) value;
1775 if (0 != peer_ctx->num_outstanding_ops)
1776 GNUNET_array_grow (peer_ctx->outstanding_ops,
1777 peer_ctx->num_outstanding_ops,
1780 if (NULL != peer_ctx->mq)
1781 GNUNET_MQ_destroy (peer_ctx->mq);
1783 if (NULL != peer_ctx->is_live_task)
1785 LOG (GNUNET_ERROR_TYPE_DEBUG,
1786 "Trying to cancle is_live_task for peer %s\n",
1788 GNUNET_CADET_notify_transmit_ready_cancel (peer_ctx->is_live_task);
1789 peer_ctx->is_live_task = NULL;
1792 send = peer_ctx->send_channel;
1793 peer_ctx->send_channel = NULL;
1797 GNUNET_CADET_channel_destroy (send);
1800 recv = peer_ctx->send_channel;
1801 peer_ctx->recv_channel = NULL;
1805 GNUNET_CADET_channel_destroy (recv);
1808 if (GNUNET_YES != GNUNET_CONTAINER_multipeermap_remove_all (peer_map, key))
1809 LOG (GNUNET_ERROR_TYPE_WARNING, "removing peer from peer_map failed\n");
1811 GNUNET_free (peer_ctx);
1819 * Task run during shutdown.
1825 shutdown_task (void *cls,
1826 const struct GNUNET_SCHEDULER_TaskContext *tc)
1828 LOG (GNUNET_ERROR_TYPE_DEBUG, "RPS is going down\n");
1830 if (NULL != do_round_task)
1832 GNUNET_SCHEDULER_cancel (do_round_task);
1833 do_round_task = NULL;
1838 if (GNUNET_SYSERR ==
1839 GNUNET_CONTAINER_multipeermap_iterate (peer_map, peer_remove_cb, NULL))
1840 LOG (GNUNET_ERROR_TYPE_WARNING,
1841 "Iterating over peers to disconnect from them was cancelled\n");
1844 GNUNET_NSE_disconnect (nse);
1845 GNUNET_CADET_disconnect (cadet_handle);
1846 RPS_sampler_destroy (prot_sampler);
1847 RPS_sampler_destroy (client_sampler);
1848 LOG (GNUNET_ERROR_TYPE_DEBUG,
1849 "Size of the peermap: %u\n",
1850 GNUNET_CONTAINER_multipeermap_size (peer_map));
1851 GNUNET_break (0 == GNUNET_CONTAINER_multipeermap_size (peer_map));
1852 GNUNET_CONTAINER_multipeermap_destroy (peer_map);
1853 GNUNET_array_grow (gossip_list, gossip_list_size, 0);
1854 GNUNET_array_grow (push_list, push_list_size, 0);
1855 GNUNET_array_grow (pull_list, pull_list_size, 0);
1860 * A client disconnected. Remove all of its data structure entries.
1862 * @param cls closure, NULL
1863 * @param client identification of the client
1866 handle_client_disconnect (void *cls,
1867 struct GNUNET_SERVER_Client * client)
1873 * Handle the channel a peer opens to us.
1875 * @param cls The closure
1876 * @param channel The channel the peer wants to establish
1877 * @param initiator The peer's peer ID
1878 * @param port The port the channel is being established over
1879 * @param options Further options
1882 handle_inbound_channel (void *cls,
1883 struct GNUNET_CADET_Channel *channel,
1884 const struct GNUNET_PeerIdentity *initiator,
1886 enum GNUNET_CADET_ChannelOption options)
1888 struct PeerContext *peer_ctx;
1889 struct GNUNET_PeerIdentity peer;
1892 LOG (GNUNET_ERROR_TYPE_DEBUG,
1893 "New channel was established to us (Peer %s).\n",
1894 GNUNET_i2s (&peer));
1896 GNUNET_assert (NULL != channel);
1898 // we might not even store the recv_channel
1900 peer_ctx = get_peer_ctx (peer_map, &peer);
1901 // FIXME what do we do if a channel is established twice?
1902 // overwrite? Clean old channel? ...?
1903 //if (NULL != peer_ctx->recv_channel)
1905 // peer_ctx->recv_channel = channel;
1907 peer_ctx->recv_channel = channel;
1909 peer_ctx->mq = NULL;
1911 (void) GNUNET_CONTAINER_multipeermap_put (peer_map, &peer, peer_ctx,
1912 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
1914 peer_is_live (peer_ctx);
1916 return NULL; // TODO
1921 * This is called when a remote peer destroys a channel.
1923 * @param cls The closure
1924 * @param channel The channel being closed
1925 * @param channel_ctx The context associated with this channel
1928 cleanup_channel (void *cls,
1929 const struct GNUNET_CADET_Channel *channel,
1932 struct GNUNET_PeerIdentity *peer;
1933 struct PeerContext *peer_ctx;
1935 peer = (struct GNUNET_PeerIdentity *) GNUNET_CADET_channel_get_info (
1936 (struct GNUNET_CADET_Channel *) channel, GNUNET_CADET_OPTION_PEER);
1937 // Guess simply casting isn't the nicest way...
1938 // FIXME wait for cadet to change this function
1939 LOG (GNUNET_ERROR_TYPE_DEBUG, "Cleaning up channel to peer %s\n",
1942 if (GNUNET_YES == GNUNET_CONTAINER_multipeermap_contains (peer_map, peer))
1944 peer_ctx = GNUNET_CONTAINER_multipeermap_get (peer_map, peer);
1946 if (NULL == peer_ctx) /* It could have been removed by shutdown_task */
1949 if (channel == peer_ctx->send_channel)
1950 { /* Peer probably went down */
1951 rem_from_list (&gossip_list, &gossip_list_size, peer);
1952 rem_from_list (&pending_pull_reply_list, &pending_pull_reply_list_size, peer);
1954 /* Somwewhat {ab,re}use the iterator function */
1955 /* Cast to void is ok, because it's used as void in peer_remove_cb */
1956 (void) peer_remove_cb ((void *) channel, peer, peer_ctx);
1958 else /* Other peer doesn't want to send us messages anymore */
1959 peer_ctx->recv_channel = NULL;
1965 * Actually start the service.
1968 rps_start (struct GNUNET_SERVER_Handle *server)
1970 static const struct GNUNET_SERVER_MessageHandler handlers[] = {
1971 {&handle_client_request, NULL, GNUNET_MESSAGE_TYPE_RPS_CS_REQUEST,
1972 sizeof (struct GNUNET_RPS_CS_RequestMessage)},
1973 {&handle_client_seed, NULL, GNUNET_MESSAGE_TYPE_RPS_CS_SEED, 0},
1977 GNUNET_SERVER_add_handlers (server, handlers);
1978 GNUNET_SERVER_disconnect_notify (server,
1979 &handle_client_disconnect,
1981 LOG (GNUNET_ERROR_TYPE_DEBUG, "Ready to receive requests from clients\n");
1984 do_round_task = GNUNET_SCHEDULER_add_now (&do_round, NULL);
1985 LOG (GNUNET_ERROR_TYPE_DEBUG, "Scheduled first round\n");
1987 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
1994 * Process statistics requests.
1996 * @param cls closure
1997 * @param server the initialized server
1998 * @param c configuration to use
2002 struct GNUNET_SERVER_Handle *server,
2003 const struct GNUNET_CONFIGURATION_Handle *c)
2005 // TODO check what this does -- copied from gnunet-boss
2006 // - seems to work as expected
2007 GNUNET_log_setup ("rps", GNUNET_error_type_to_string (GNUNET_ERROR_TYPE_DEBUG), NULL);
2012 GNUNET_CRYPTO_get_peer_identity (cfg, &own_identity); // TODO check return value
2013 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2014 "STARTING SERVICE (rps) for peer [%s]\n",
2015 GNUNET_i2s (&own_identity));
2018 /* Get time interval from the configuration */
2019 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_time (cfg, "RPS",
2023 LOG (GNUNET_ERROR_TYPE_DEBUG, "Failed to read ROUNDINTERVAL from config\n");
2024 GNUNET_SCHEDULER_shutdown ();
2028 /* Get initial size of sampler/gossip list from the configuration */
2029 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_number (cfg, "RPS",
2031 (long long unsigned int *) &sampler_size_est_need))
2033 LOG (GNUNET_ERROR_TYPE_DEBUG, "Failed to read INITSIZE from config\n");
2034 GNUNET_SCHEDULER_shutdown ();
2037 LOG (GNUNET_ERROR_TYPE_DEBUG, "INITSIZE is %" PRIu64 "\n", sampler_size_est_need);
2043 /* connect to NSE */
2044 nse = GNUNET_NSE_connect (cfg, nse_callback, NULL);
2045 // TODO check whether that was successful
2046 LOG (GNUNET_ERROR_TYPE_DEBUG, "Connected to NSE\n");
2052 peer_map = GNUNET_CONTAINER_multipeermap_create (sampler_size_est_need, GNUNET_NO);
2055 /* Initialise cadet */
2056 static const struct GNUNET_CADET_MessageHandler cadet_handlers[] = {
2057 {&handle_peer_push , GNUNET_MESSAGE_TYPE_RPS_PP_PUSH ,
2058 sizeof (struct GNUNET_MessageHeader)},
2059 {&handle_peer_pull_request, GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REQUEST,
2060 sizeof (struct GNUNET_MessageHeader)},
2061 {&handle_peer_pull_reply , GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REPLY , 0},
2062 #if ENABLE_MALICIOUS
2063 {&handle_peer_act_malicious, GNUNET_MESSAGE_TYPE_RPS_ACT_MALICIOUS , 0},
2064 #endif /* ENABLE_MALICIOUS */
2068 const uint32_t ports[] = {GNUNET_RPS_CADET_PORT, 0}; // _PORT specified in src/rps/rps.h
2069 cadet_handle = GNUNET_CADET_connect (cfg,
2071 &handle_inbound_channel,
2075 LOG (GNUNET_ERROR_TYPE_DEBUG, "Connected to CADET\n");
2078 /* Initialise sampler */
2079 struct GNUNET_TIME_Relative half_round_interval;
2080 struct GNUNET_TIME_Relative max_round_interval;
2082 half_round_interval = GNUNET_TIME_relative_multiply (round_interval, .5);
2083 max_round_interval = GNUNET_TIME_relative_add (round_interval, half_round_interval);
2085 prot_sampler = RPS_sampler_init (sampler_size_est_need, max_round_interval);
2086 client_sampler = RPS_sampler_init (sampler_size_est_need, max_round_interval);
2088 /* Initialise push and pull maps */
2093 pending_pull_reply_list = NULL;
2094 pending_pull_reply_list_size = 0;
2097 num_hist_update_tasks = 0;
2100 LOG (GNUNET_ERROR_TYPE_DEBUG, "Requesting peers from CADET\n");
2101 GNUNET_CADET_get_peers (cadet_handle, &init_peer_cb, NULL);
2102 // TODO send push/pull to each of those peers?
2110 * The main function for the rps service.
2112 * @param argc number of arguments from the command line
2113 * @param argv command line arguments
2114 * @return 0 ok, 1 on error
2117 main (int argc, char *const *argv)
2119 return (GNUNET_OK ==
2120 GNUNET_SERVICE_run (argc,
2123 GNUNET_SERVICE_OPTION_NONE,
2124 &run, NULL)) ? 0 : 1;
2127 /* end of gnunet-service-rps.c */