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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 #ifdef ENABLE_MALICIOUS
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 = NULL;
375 * Number of other malicious peers
377 static uint32_t num_mal_peers = 0;
381 * If type is 2 This struct is used to store the attacked peers in a DLL
388 struct AttackedPeer *next;
389 struct AttackedPeer *prev;
394 struct GNUNET_PeerIdentity *peer_id;
398 * If type is 2 this is the DLL of attacked peers
400 //static struct AttackedPeer *att_peers_head = NULL;
401 //static struct AttackedPeer *att_peers_tail = NULL;
404 * Number of attacked peers
406 //static uint32_t num_attacked_peers = 0;
410 * If type is 1 this is the attacked peer
412 static struct GNUNET_PeerIdentity attacked_peer;
415 * The limit of PUSHes we can send in one round.
416 * This is an assumption of the Brahms protocol and either implemented
419 * assumend to be the bandwidth limitation.
421 static uint32_t push_limit = 10000;
422 #endif /* ENABLE_MALICIOUS */
425 /***********************************************************************
427 ***********************************************************************/
434 /***********************************************************************
436 ***********************************************************************/
439 * Set a peer flag of given peer context.
441 #define set_peer_flag(peer_ctx, mask) (peer_ctx->peer_flags |= mask)
444 * Get peer flag of given peer context.
446 #define get_peer_flag(peer_ctx, mask) (peer_ctx->peer_flags & mask ? GNUNET_YES : GNUNET_NO)
449 * Unset flag of given peer context.
451 #define unset_peer_flag(peer_ctx, mask) (peer_ctx->peer_flags &= (~mask))
454 * Compute the minimum of two ints
456 #define min(x, y) ((x < y) ? x : y)
459 * Clean the send channel of a peer
462 peer_clean (const struct GNUNET_PeerIdentity *peer);
466 * Check if peer is already in peer array.
469 in_arr (const struct GNUNET_PeerIdentity *array,
470 unsigned int arr_size,
471 const struct GNUNET_PeerIdentity *peer)
473 GNUNET_assert (NULL != peer);
478 GNUNET_assert (NULL != array);
482 for (i = 0; i < arr_size ; i++)
483 if (0 == GNUNET_CRYPTO_cmp_peer_identity (&array[i], peer))
490 * Print peerlist to log.
493 print_peer_list (struct GNUNET_PeerIdentity *list, unsigned int len)
497 LOG (GNUNET_ERROR_TYPE_DEBUG,
498 "Printing peer list of length %u at %p:\n",
501 for (i = 0 ; i < len ; i++)
503 LOG (GNUNET_ERROR_TYPE_DEBUG,
505 i, GNUNET_i2s (&list[i]));
511 * Remove peer from list.
514 rem_from_list (struct GNUNET_PeerIdentity **peer_list,
515 unsigned int *list_size,
516 const struct GNUNET_PeerIdentity *peer)
519 struct GNUNET_PeerIdentity *tmp;
523 LOG (GNUNET_ERROR_TYPE_DEBUG,
524 "Removing peer %s from list at %p\n",
528 for ( i = 0 ; i < *list_size ; i++ )
530 if (0 == GNUNET_CRYPTO_cmp_peer_identity (&tmp[i], peer))
532 if (i < *list_size -1)
533 { /* Not at the last entry -- shift peers left */
534 memcpy (&tmp[i], &tmp[i +1],
535 ((*list_size) - i -1) * sizeof (struct GNUNET_PeerIdentity));
537 /* Remove last entry (should be now useless PeerID) */
538 GNUNET_array_grow (tmp, *list_size, (*list_size) -1);
545 * Get random peer from the given list but don't return one from the @a ignore_list.
547 struct GNUNET_PeerIdentity *
548 get_rand_peer_ignore_list (const struct GNUNET_PeerIdentity *peer_list,
550 const struct GNUNET_PeerIdentity *ignore_list,
551 uint32_t ignore_size)
555 struct GNUNET_PeerIdentity *tmp_peer_list;
556 struct GNUNET_PeerIdentity *peer;
558 GNUNET_assert (NULL != peer_list);
563 tmp_peer_list = NULL;
564 GNUNET_array_grow (tmp_peer_list, tmp_size, list_size);
565 memcpy (tmp_peer_list,
567 list_size * sizeof (struct GNUNET_PeerIdentity));
568 peer = GNUNET_new (struct GNUNET_PeerIdentity);
571 * Choose the r_index of the peer we want to return
572 * at random from the interval of the gossip list
574 r_index = GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_STRONG,
576 *peer = tmp_peer_list[r_index];
578 while (in_arr (ignore_list, ignore_size, peer))
580 rem_from_list (&tmp_peer_list, &tmp_size, peer);
582 print_peer_list (tmp_peer_list, tmp_size);
591 * Choose the r_index of the peer we want to return
592 * at random from the interval of the gossip list
594 r_index = GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_STRONG,
596 *peer = tmp_peer_list[r_index];
600 GNUNET_array_grow (tmp_peer_list, tmp_size, 0);
607 * Get the context of a peer. If not existing, create.
610 get_peer_ctx (struct GNUNET_CONTAINER_MultiPeerMap *peer_map,
611 const struct GNUNET_PeerIdentity *peer)
613 struct PeerContext *ctx;
615 if ( GNUNET_YES == GNUNET_CONTAINER_multipeermap_contains (peer_map, peer))
617 ctx = GNUNET_CONTAINER_multipeermap_get (peer_map, peer);
621 ctx = GNUNET_new (struct PeerContext);
624 ctx->send_channel = NULL;
625 ctx->recv_channel = NULL;
626 ctx->outstanding_ops = NULL;
627 ctx->num_outstanding_ops = 0;
628 ctx->is_live_task = NULL;
629 ctx->peer_id = *peer;
630 (void) GNUNET_CONTAINER_multipeermap_put (peer_map, peer, ctx,
631 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
638 * Put random peer from sampler into the gossip list as history update.
641 hist_update (void *cls, struct GNUNET_PeerIdentity *ids, uint32_t num_peers)
643 GNUNET_assert (1 == num_peers);
645 if (gossip_list_size < sampler_size_est_need)
646 GNUNET_array_append (gossip_list, gossip_list_size, *ids);
648 if (0 < num_hist_update_tasks)
649 num_hist_update_tasks--;
654 * Set the peer flag to living and call the outstanding operations on this peer.
657 peer_is_live (struct PeerContext *peer_ctx)
659 struct GNUNET_PeerIdentity *peer;
661 /* Cancle is_live_task if still scheduled */
662 if (NULL != peer_ctx->is_live_task)
664 GNUNET_CADET_notify_transmit_ready_cancel (peer_ctx->is_live_task);
665 peer_ctx->is_live_task = NULL;
668 peer = &peer_ctx->peer_id;
669 set_peer_flag (peer_ctx, VALID);
671 LOG (GNUNET_ERROR_TYPE_DEBUG, "Peer %s is live\n", GNUNET_i2s (peer));
673 if (0 != peer_ctx->num_outstanding_ops)
674 { /* Call outstanding operations */
677 for (i = 0 ; i < peer_ctx->num_outstanding_ops ; i++)
678 peer_ctx->outstanding_ops[i].op (peer_ctx->outstanding_ops[i].op_cls, peer);
679 GNUNET_array_grow (peer_ctx->outstanding_ops, peer_ctx->num_outstanding_ops, 0);
687 * Callback that is called when a channel was effectively established.
688 * This is given to ntfy_tmt_rdy and called when the channel was
689 * successfully established.
692 cadet_ntfy_tmt_rdy_cb (void *cls, size_t size, void *buf)
694 struct PeerContext *peer_ctx = (struct PeerContext *) cls;
699 peer_ctx->is_live_task = NULL;
700 peer_is_live (peer_ctx);
703 //if (NULL != peer_ctx->is_live_task)
705 // LOG (GNUNET_ERROR_TYPE_DEBUG,
706 // "Trying to cancle is_live_task for peer %s\n",
707 // GNUNET_i2s (&peer_ctx->peer_id));
708 // GNUNET_CADET_notify_transmit_ready_cancel (peer_ctx->is_live_task);
709 // peer_ctx->is_live_task = NULL;
717 * Get the channel of a peer. If not existing, create.
719 struct GNUNET_CADET_Channel *
720 get_channel (struct GNUNET_CONTAINER_MultiPeerMap *peer_map,
721 const struct GNUNET_PeerIdentity *peer)
723 struct PeerContext *peer_ctx;
725 peer_ctx = get_peer_ctx (peer_map, peer);
726 if (NULL == peer_ctx->send_channel)
728 LOG (GNUNET_ERROR_TYPE_DEBUG,
729 "Trying to establish channel to peer %s\n",
732 peer_ctx->send_channel =
733 GNUNET_CADET_channel_create (cadet_handle,
736 GNUNET_RPS_CADET_PORT,
737 GNUNET_CADET_OPTION_RELIABLE);
739 // do I have to explicitly put it in the peer_map?
740 (void) GNUNET_CONTAINER_multipeermap_put
744 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
746 return peer_ctx->send_channel;
751 * Get the message queue of a specific peer.
753 * If we already have a message queue open to this client,
754 * simply return it, otherways create one.
756 struct GNUNET_MQ_Handle *
757 get_mq (struct GNUNET_CONTAINER_MultiPeerMap *peer_map,
758 const struct GNUNET_PeerIdentity *peer_id)
760 struct PeerContext *peer_ctx;
762 peer_ctx = get_peer_ctx (peer_map, peer_id);
764 if (NULL == peer_ctx->mq)
766 (void) get_channel (peer_map, peer_id);
767 peer_ctx->mq = GNUNET_CADET_mq_create (peer_ctx->send_channel);
768 //do I have to explicitly put it in the peer_map?
769 (void) GNUNET_CONTAINER_multipeermap_put (peer_map, peer_id, peer_ctx,
770 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
777 * Issue check whether peer is live
779 * @param peer_ctx the context of the peer
782 check_peer_live (struct PeerContext *peer_ctx)
784 (void) get_channel (peer_map, &peer_ctx->peer_id);
785 LOG (GNUNET_ERROR_TYPE_DEBUG,
786 "Get informed about peer %s getting live\n",
787 GNUNET_i2s (&peer_ctx->peer_id));
788 peer_ctx->is_live_task =
789 GNUNET_CADET_notify_transmit_ready (peer_ctx->send_channel,
791 GNUNET_TIME_UNIT_FOREVER_REL,
792 sizeof (struct GNUNET_MessageHeader),
793 cadet_ntfy_tmt_rdy_cb,
795 // FIXME check whether this is NULL
800 * Sum all time relatives of an array.
802 struct GNUNET_TIME_Relative
803 T_relative_sum (const struct GNUNET_TIME_Relative *rel_array, uint32_t arr_size)
805 struct GNUNET_TIME_Relative sum;
808 sum = GNUNET_TIME_UNIT_ZERO;
809 for ( i = 0 ; i < arr_size ; i++ )
811 sum = GNUNET_TIME_relative_add (sum, rel_array[i]);
818 * Compute the average of given time relatives.
820 struct GNUNET_TIME_Relative
821 T_relative_avg (const struct GNUNET_TIME_Relative *rel_array, uint32_t arr_size)
823 return GNUNET_TIME_relative_divide (T_relative_sum (rel_array, arr_size), arr_size);
828 * Insert PeerID in #pull_list
830 * Called once we know a peer is live.
833 insert_in_pull_list (void *cls, const struct GNUNET_PeerIdentity *peer)
835 if (GNUNET_NO == in_arr (pull_list, pull_list_size, peer))
836 GNUNET_array_append (pull_list, pull_list_size, *peer);
842 * Check whether #insert_in_pull_list was already scheduled
845 insert_in_pull_list_scheduled (const struct PeerContext *peer_ctx)
849 for ( i = 0 ; i < peer_ctx->num_outstanding_ops ; i++ )
850 if (insert_in_pull_list == peer_ctx->outstanding_ops[i].op)
857 * Insert PeerID in #gossip_list
859 * Called once we know a peer is live.
862 insert_in_gossip_list (void *cls, const struct GNUNET_PeerIdentity *peer)
864 if (GNUNET_NO == in_arr (gossip_list, gossip_list_size, peer))
865 GNUNET_array_append (gossip_list, gossip_list_size, *peer);
867 (void) get_channel (peer_map, peer);
871 * Check whether #insert_in_gossip_list was already scheduled
874 insert_in_gossip_list_scheduled (const struct PeerContext *peer_ctx)
878 for ( i = 0 ; i < peer_ctx->num_outstanding_ops ; i++ )
879 if (insert_in_gossip_list == peer_ctx->outstanding_ops[i].op)
886 * Update sampler with given PeerID.
889 insert_in_sampler (void *cls, const struct GNUNET_PeerIdentity *peer)
891 LOG (GNUNET_ERROR_TYPE_DEBUG,
892 "Updating samplers with peer %s from insert_in_sampler()\n",
894 RPS_sampler_update (prot_sampler, peer);
895 RPS_sampler_update (client_sampler, peer);
900 * Check whether #insert_in_sampler was already scheduled
903 insert_in_sampler_scheduled (const struct PeerContext *peer_ctx)
907 for ( i = 0 ; i < peer_ctx->num_outstanding_ops ; i++ )
908 if (insert_in_sampler== peer_ctx->outstanding_ops[i].op)
915 * Wrapper around #RPS_sampler_resize()
917 * If we do not have enough sampler elements, double current sampler size
918 * If we have more than enough sampler elements, halv current sampler size
921 resize_wrapper (struct RPS_Sampler *sampler, uint32_t new_size)
923 unsigned int sampler_size;
926 // TODO respect the min, max
927 sampler_size = RPS_sampler_get_size (sampler);
928 if (sampler_size > new_size * 4)
930 RPS_sampler_resize (sampler, sampler_size / 2);
932 else if (sampler_size < new_size)
934 RPS_sampler_resize (sampler, sampler_size * 2);
936 LOG (GNUNET_ERROR_TYPE_DEBUG, "sampler_size is now %u\n", sampler_size);
941 * Wrapper around #RPS_sampler_resize() resizing the client sampler
944 client_resize_wrapper ()
946 uint32_t bigger_size;
947 unsigned int sampler_size;
951 sampler_size = RPS_sampler_get_size (client_sampler);
953 if (sampler_size_est_need > sampler_size_client_need)
954 bigger_size = sampler_size_est_need;
956 bigger_size = sampler_size_client_need;
958 // TODO respect the min, max
959 resize_wrapper (client_sampler, bigger_size);
960 LOG (GNUNET_ERROR_TYPE_DEBUG, "sampler_size is now %u\n", sampler_size);
965 * Estimate request rate
967 * Called every time we receive a request from the client.
972 struct GNUNET_TIME_Relative max_round_duration;
974 if (request_deltas_size > req_counter)
976 if ( 1 < req_counter)
978 /* Shift last request deltas to the right */
979 memcpy (&request_deltas[1],
981 (req_counter - 1) * sizeof (struct GNUNET_TIME_Relative));
983 /* Add current delta to beginning */
985 GNUNET_TIME_absolute_get_difference (last_request,
986 GNUNET_TIME_absolute_get ());
987 request_rate = T_relative_avg (request_deltas, req_counter);
989 /* Compute the duration a round will maximally take */
991 GNUNET_TIME_relative_add (round_interval,
992 GNUNET_TIME_relative_divide (round_interval, 2));
994 /* Set the estimated size the sampler has to have to
995 * satisfy the current client request rate */
996 sampler_size_client_need =
997 max_round_duration.rel_value_us / request_rate.rel_value_us;
999 /* Resize the sampler */
1000 client_resize_wrapper ();
1002 last_request = GNUNET_TIME_absolute_get ();
1006 /***********************************************************************
1008 ***********************************************************************/
1015 * Function called by NSE.
1017 * Updates sizes of sampler list and gossip list and adapt those lists
1021 nse_callback (void *cls, struct GNUNET_TIME_Absolute timestamp,
1022 double logestimate, double std_dev)
1025 //double scale; // TODO this might go gloabal/config
1027 LOG (GNUNET_ERROR_TYPE_DEBUG,
1028 "Received a ns estimate - logest: %f, std_dev: %f (old_size: %u)\n",
1029 logestimate, std_dev, RPS_sampler_get_size (prot_sampler));
1031 estimate = GNUNET_NSE_log_estimate_to_n (logestimate);
1032 // GNUNET_NSE_log_estimate_to_n (logestimate);
1033 estimate = pow (estimate, 1.0 / 3);
1034 // TODO add if std_dev is a number
1035 // estimate += (std_dev * scale);
1036 if (2 < ceil (estimate))
1038 LOG (GNUNET_ERROR_TYPE_DEBUG, "Changing estimate to %f\n", estimate);
1039 sampler_size_est_need = estimate;
1041 LOG (GNUNET_ERROR_TYPE_DEBUG, "Not using estimate %f\n", estimate);
1043 /* If the NSE has changed adapt the lists accordingly */
1044 resize_wrapper (prot_sampler, sampler_size_est_need);
1045 client_resize_wrapper ();
1050 * Callback called once the requested PeerIDs are ready.
1052 * Sends those to the requesting client.
1054 void client_respond (void *cls,
1055 struct GNUNET_PeerIdentity *ids, uint32_t num_peers)
1057 LOG (GNUNET_ERROR_TYPE_DEBUG, "sampler returned %" PRIX32 " peers\n", num_peers);
1058 struct GNUNET_MQ_Envelope *ev;
1059 struct GNUNET_RPS_CS_ReplyMessage *out_msg;
1060 struct GNUNET_SERVER_Client *client;
1061 uint32_t size_needed;
1062 struct client_ctx *cli_ctx;
1064 client = (struct GNUNET_SERVER_Client *) cls;
1066 size_needed = sizeof (struct GNUNET_RPS_CS_ReplyMessage) +
1067 num_peers * sizeof (struct GNUNET_PeerIdentity);
1069 GNUNET_assert (GNUNET_SERVER_MAX_MESSAGE_SIZE >= size_needed);
1071 ev = GNUNET_MQ_msg_extra (out_msg,
1072 num_peers * sizeof (struct GNUNET_PeerIdentity),
1073 GNUNET_MESSAGE_TYPE_RPS_CS_REPLY);
1074 out_msg->num_peers = htonl (num_peers);
1076 memcpy (&out_msg[1],
1078 num_peers * sizeof (struct GNUNET_PeerIdentity));
1081 cli_ctx = GNUNET_SERVER_client_get_user_context (client, struct client_ctx);
1082 if (NULL == cli_ctx) {
1083 cli_ctx = GNUNET_new (struct client_ctx);
1084 cli_ctx->mq = GNUNET_MQ_queue_for_server_client (client);
1085 GNUNET_SERVER_client_set_user_context (client, cli_ctx);
1088 GNUNET_MQ_send (cli_ctx->mq, ev);
1093 * Handle RPS request from the client.
1095 * @param cls closure
1096 * @param client identification of the client
1097 * @param message the actual message
1100 handle_client_request (void *cls,
1101 struct GNUNET_SERVER_Client *client,
1102 const struct GNUNET_MessageHeader *message)
1104 struct GNUNET_RPS_CS_RequestMessage *msg;
1106 uint32_t size_needed;
1109 msg = (struct GNUNET_RPS_CS_RequestMessage *) message;
1111 num_peers = ntohl (msg->num_peers);
1112 size_needed = sizeof (struct GNUNET_RPS_CS_RequestMessage) +
1113 num_peers * sizeof (struct GNUNET_PeerIdentity);
1115 if (GNUNET_SERVER_MAX_MESSAGE_SIZE < size_needed)
1117 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
1121 for (i = 0 ; i < num_peers ; i++)
1124 LOG (GNUNET_ERROR_TYPE_DEBUG, "Client requested %" PRIX32 " random peer(s).\n", num_peers);
1126 RPS_sampler_get_n_rand_peers (client_sampler, client_respond,
1127 client, num_peers, GNUNET_YES);
1129 GNUNET_SERVER_receive_done (client,
1135 * Handle seed from the client.
1137 * @param cls closure
1138 * @param client identification of the client
1139 * @param message the actual message
1142 handle_client_seed (void *cls,
1143 struct GNUNET_SERVER_Client *client,
1144 const struct GNUNET_MessageHeader *message)
1146 struct GNUNET_RPS_CS_SeedMessage *in_msg;
1147 struct GNUNET_PeerIdentity *peers;
1151 if (sizeof (struct GNUNET_RPS_CS_SeedMessage) > ntohs (message->size))
1153 GNUNET_break_op (0);
1154 GNUNET_SERVER_receive_done (client,
1158 in_msg = (struct GNUNET_RPS_CS_SeedMessage *) message;
1159 num_peers = ntohl (in_msg->num_peers);
1160 peers = (struct GNUNET_PeerIdentity *) &in_msg[1];
1161 //peers = GNUNET_new_array (num_peers, struct GNUNET_PeerIdentity);
1162 //memcpy (peers, &in_msg[1], num_peers * sizeof (struct GNUNET_PeerIdentity));
1164 if ((ntohs (message->size) - sizeof (struct GNUNET_RPS_CS_SeedMessage)) /
1165 sizeof (struct GNUNET_PeerIdentity) != num_peers)
1167 GNUNET_break_op (0);
1168 GNUNET_SERVER_receive_done (client,
1172 LOG (GNUNET_ERROR_TYPE_DEBUG,
1173 "Client seeded peers:\n");
1174 print_peer_list (peers, num_peers);
1176 // TODO check for validity of ids
1178 for (i = 0 ; i < num_peers ; i++)
1180 LOG (GNUNET_ERROR_TYPE_DEBUG,
1181 "Updating samplers with seed %" PRIX32 ": %s\n",
1183 GNUNET_i2s (&peers[i]));
1185 RPS_sampler_update (prot_sampler, &peers[i]);
1186 RPS_sampler_update (client_sampler, &peers[i]);
1189 //GNUNET_free (peers);
1191 GNUNET_SERVER_receive_done (client,
1197 * Handle a PUSH message from another peer.
1199 * Check the proof of work and store the PeerID
1200 * in the temporary list for pushed PeerIDs.
1202 * @param cls Closure
1203 * @param channel The channel the PUSH was received over
1204 * @param channel_ctx The context associated with this channel
1205 * @param msg The message header
1208 handle_peer_push (void *cls,
1209 struct GNUNET_CADET_Channel *channel,
1211 const struct GNUNET_MessageHeader *msg)
1213 const struct GNUNET_PeerIdentity *peer;
1215 // (check the proof of work)
1217 peer = (const struct GNUNET_PeerIdentity *) GNUNET_CADET_channel_get_info (channel, GNUNET_CADET_OPTION_PEER);
1218 // FIXME wait for cadet to change this function
1219 LOG (GNUNET_ERROR_TYPE_DEBUG, "PUSH received (%s)\n", GNUNET_i2s (peer));
1221 /* Add the sending peer to the push_list */
1222 if (GNUNET_NO == in_arr (push_list, push_list_size, peer))
1223 GNUNET_array_append (push_list, push_list_size, *peer);
1229 * Handle PULL REQUEST request message from another peer.
1231 * Reply with the gossip list of PeerIDs.
1233 * @param cls Closure
1234 * @param channel The channel the PUSH was received over
1235 * @param channel_ctx The context associated with this channel
1236 * @param msg The message header
1239 handle_peer_pull_request (void *cls,
1240 struct GNUNET_CADET_Channel *channel,
1242 const struct GNUNET_MessageHeader *msg)
1244 struct GNUNET_PeerIdentity *peer;
1246 struct GNUNET_MQ_Handle *mq;
1247 struct GNUNET_MQ_Envelope *ev;
1248 struct GNUNET_RPS_P2P_PullReplyMessage *out_msg;
1251 peer = (struct GNUNET_PeerIdentity *)
1252 GNUNET_CADET_channel_get_info (channel,
1253 GNUNET_CADET_OPTION_PEER);
1254 // FIXME wait for cadet to change this function
1256 /* Compute actual size */
1257 send_size = sizeof (struct GNUNET_RPS_P2P_PullReplyMessage) +
1258 gossip_list_size * sizeof (struct GNUNET_PeerIdentity);
1260 if (GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE < send_size)
1261 /* Compute number of peers to send
1262 * If too long, simply truncate */
1263 // TODO select random ones via permutation
1265 (GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE -
1266 sizeof (struct GNUNET_RPS_P2P_PullReplyMessage)) /
1267 sizeof (struct GNUNET_PeerIdentity);
1269 send_size = gossip_list_size;
1271 LOG (GNUNET_ERROR_TYPE_DEBUG,
1272 "PULL REQUEST from peer %s received, going to send %u peers\n",
1273 GNUNET_i2s (peer), send_size);
1275 mq = get_mq (peer_map, peer);
1277 ev = GNUNET_MQ_msg_extra (out_msg,
1278 send_size * sizeof (struct GNUNET_PeerIdentity),
1279 GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REPLY);
1280 //out_msg->num_peers = htonl (gossip_list_size);
1281 out_msg->num_peers = htonl (send_size);
1282 memcpy (&out_msg[1], gossip_list,
1283 send_size * sizeof (struct GNUNET_PeerIdentity));
1285 GNUNET_MQ_send (mq, ev);
1292 * Handle PULL REPLY message from another peer.
1294 * Check whether we sent a corresponding request and
1295 * whether this reply is the first one.
1297 * @param cls Closure
1298 * @param channel The channel the PUSH was received over
1299 * @param channel_ctx The context associated with this channel
1300 * @param msg The message header
1303 handle_peer_pull_reply (void *cls,
1304 struct GNUNET_CADET_Channel *channel,
1306 const struct GNUNET_MessageHeader *msg)
1308 LOG (GNUNET_ERROR_TYPE_DEBUG, "PULL REPLY received\n");
1310 struct GNUNET_RPS_P2P_PullReplyMessage *in_msg;
1311 struct GNUNET_PeerIdentity *peers;
1312 struct PeerContext *peer_ctx;
1313 struct GNUNET_PeerIdentity *sender;
1314 struct PeerContext *sender_ctx;
1315 struct PeerOutstandingOp out_op;
1318 /* Check for protocol violation */
1319 if (sizeof (struct GNUNET_RPS_P2P_PullReplyMessage) > ntohs (msg->size))
1321 GNUNET_break_op (0);
1322 return GNUNET_SYSERR;
1325 in_msg = (struct GNUNET_RPS_P2P_PullReplyMessage *) msg;
1326 if ((ntohs (msg->size) - sizeof (struct GNUNET_RPS_P2P_PullReplyMessage)) /
1327 sizeof (struct GNUNET_PeerIdentity) != ntohl (in_msg->num_peers))
1329 LOG (GNUNET_ERROR_TYPE_ERROR,
1330 "message says it sends %" PRIu64 " peers, have space for %i peers\n",
1331 ntohl (in_msg->num_peers),
1332 (ntohs (msg->size) - sizeof (struct GNUNET_RPS_P2P_PullReplyMessage)) /
1333 sizeof (struct GNUNET_PeerIdentity));
1334 GNUNET_break_op (0);
1335 return GNUNET_SYSERR;
1338 sender = (struct GNUNET_PeerIdentity *) GNUNET_CADET_channel_get_info (
1339 (struct GNUNET_CADET_Channel *) channel, GNUNET_CADET_OPTION_PEER);
1340 // Guess simply casting isn't the nicest way...
1341 // FIXME wait for cadet to change this function
1342 sender_ctx = get_peer_ctx (peer_map, sender);
1344 if (GNUNET_YES == get_peer_flag (sender_ctx, PULL_REPLY_PENDING))
1346 GNUNET_break_op (0);
1351 /* Do actual logic */
1352 peers = (struct GNUNET_PeerIdentity *) &msg[1];
1353 for (i = 0 ; i < ntohl (in_msg->num_peers) ; i++)
1355 peer_ctx = get_peer_ctx (peer_map, &peers[i]);
1356 if (GNUNET_YES == get_peer_flag (peer_ctx, VALID)
1357 || NULL != peer_ctx->send_channel
1358 || NULL != peer_ctx->recv_channel)
1360 if (GNUNET_NO == in_arr (pull_list, pull_list_size, &peers[i])
1361 && 0 != GNUNET_CRYPTO_cmp_peer_identity (&own_identity, &peers[i]))
1362 GNUNET_array_append (pull_list, pull_list_size, peers[i]);
1364 else if (GNUNET_NO == insert_in_pull_list_scheduled (peer_ctx))
1366 out_op.op = insert_in_pull_list;
1367 out_op.op_cls = NULL;
1368 GNUNET_array_append (peer_ctx->outstanding_ops,
1369 peer_ctx->num_outstanding_ops,
1371 check_peer_live (peer_ctx);
1375 unset_peer_flag (sender_ctx, PULL_REPLY_PENDING);
1376 rem_from_list (&pending_pull_reply_list, &pending_pull_reply_list_size, sender);
1383 * Compute a random delay.
1384 * A uniformly distributed value between mean + spread and mean - spread.
1386 * For example for mean 4 min and spread 2 the minimum is (4 min - (1/2 * 4 min))
1387 * It would return a random value between 2 and 6 min.
1389 * @param mean the mean
1390 * @param spread the inverse amount of deviation from the mean
1392 static struct GNUNET_TIME_Relative
1393 compute_rand_delay (struct GNUNET_TIME_Relative mean, unsigned int spread)
1395 struct GNUNET_TIME_Relative half_interval;
1396 struct GNUNET_TIME_Relative ret;
1397 unsigned int rand_delay;
1398 unsigned int max_rand_delay;
1402 LOG (GNUNET_ERROR_TYPE_WARNING,
1403 "Not accepting spread of 0\n");
1407 /* Compute random time value between spread * mean and spread * mean */
1408 half_interval = GNUNET_TIME_relative_divide (mean, spread);
1410 max_rand_delay = GNUNET_TIME_UNIT_FOREVER_REL.rel_value_us / mean.rel_value_us * (2/spread);
1412 * Compute random value between (0 and 1) * round_interval
1413 * via multiplying round_interval with a 'fraction' (0 to value)/value
1415 rand_delay = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, max_rand_delay);
1416 ret = GNUNET_TIME_relative_multiply (mean, rand_delay);
1417 ret = GNUNET_TIME_relative_divide (ret, max_rand_delay);
1418 ret = GNUNET_TIME_relative_add (ret, half_interval);
1420 if (GNUNET_TIME_UNIT_FOREVER_REL.rel_value_us == ret.rel_value_us)
1421 LOG (GNUNET_ERROR_TYPE_WARNING,
1422 "Returning FOREVER_REL\n");
1429 * Send single pull request
1431 * @param peer_id the peer to send the pull request to.
1434 send_pull_request (struct GNUNET_PeerIdentity *peer_id)
1436 struct GNUNET_MQ_Envelope *ev;
1437 struct GNUNET_MQ_Handle *mq;
1439 LOG (GNUNET_ERROR_TYPE_DEBUG,
1440 "Sending PULL request to peer %s of gossiped list.\n",
1441 GNUNET_i2s (peer_id));
1443 GNUNET_array_append (pending_pull_reply_list, pending_pull_reply_list_size, *peer_id);
1445 ev = GNUNET_MQ_msg_header (GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REQUEST);
1446 mq = get_mq (peer_map, peer_id);
1447 GNUNET_MQ_send (mq, ev);
1454 * @param peer_id the peer to send the push to.
1457 send_push (struct GNUNET_PeerIdentity *peer_id)
1459 struct GNUNET_MQ_Envelope *ev;
1460 struct GNUNET_MQ_Handle *mq;
1462 LOG (GNUNET_ERROR_TYPE_DEBUG,
1463 "Sending PUSH to peer %s of gossiped list.\n",
1464 GNUNET_i2s (peer_id));
1466 ev = GNUNET_MQ_msg_header (GNUNET_MESSAGE_TYPE_RPS_PP_PUSH);
1467 mq = get_mq (peer_map, peer_id);
1468 GNUNET_MQ_send (mq, ev);
1473 do_round (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
1476 do_mal_round (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
1479 #ifdef ENABLE_MALICIOUS
1481 * Turn RPS service to act malicious.
1483 * @param cls Closure
1484 * @param channel The channel the PUSH was received over
1485 * @param channel_ctx The context associated with this channel
1486 * @param msg The message header
1489 handle_client_act_malicious (void *cls,
1490 struct GNUNET_SERVER_Client *client,
1491 const struct GNUNET_MessageHeader *msg)
1493 struct GNUNET_RPS_CS_ActMaliciousMessage *in_msg;
1494 struct GNUNET_PeerIdentity *peers;
1495 uint32_t num_mal_peers_sent;
1496 uint32_t num_mal_peers_old;
1498 /* Check for protocol violation */
1499 if (sizeof (struct GNUNET_RPS_CS_ActMaliciousMessage) > ntohs (msg->size))
1501 GNUNET_break_op (0);
1504 in_msg = (struct GNUNET_RPS_CS_ActMaliciousMessage *) msg;
1505 if ((ntohs (msg->size) - sizeof (struct GNUNET_RPS_CS_ActMaliciousMessage)) /
1506 sizeof (struct GNUNET_PeerIdentity) != ntohl (in_msg->num_peers))
1508 LOG (GNUNET_ERROR_TYPE_ERROR,
1509 "message says it sends %" PRIu64 " peers, have space for %i peers\n",
1510 ntohl (in_msg->num_peers),
1511 (ntohs (msg->size) - sizeof (struct GNUNET_RPS_CS_ActMaliciousMessage)) /
1512 sizeof (struct GNUNET_PeerIdentity));
1513 GNUNET_break_op (0);
1517 /* Do actual logic */
1518 peers = (struct GNUNET_PeerIdentity *) &msg[1];
1519 mal_type = ntohl (in_msg->type);
1521 LOG (GNUNET_ERROR_TYPE_DEBUG,
1522 "Now acting malicious type %" PRIu32 "\n",
1526 { /* Try to maximise representation */
1527 /* Add other malicious peers to those we already know */
1528 num_mal_peers_sent = ntohl (in_msg->num_peers);
1529 num_mal_peers_old = num_mal_peers;
1530 GNUNET_array_grow (mal_peers,
1532 num_mal_peers + num_mal_peers_sent);
1533 memcpy (&mal_peers[num_mal_peers_old],
1535 num_mal_peers_sent * sizeof (struct GNUNET_PeerIdentity));
1537 /* Substitute do_round () with do_mal_round () */
1538 GNUNET_SCHEDULER_cancel (do_round_task);
1539 do_round_task = GNUNET_SCHEDULER_add_now (&do_mal_round, NULL);
1541 else if (2 == mal_type)
1542 { /* Try to partition the network */
1543 /* Add other malicious peers to those we already know */
1544 num_mal_peers_sent = ntohl (in_msg->num_peers) - 1;
1545 num_mal_peers_old = num_mal_peers;
1546 GNUNET_array_grow (mal_peers,
1548 num_mal_peers + num_mal_peers_sent);
1549 memcpy (&mal_peers[num_mal_peers_old],
1551 num_mal_peers_sent * sizeof (struct GNUNET_PeerIdentity));
1553 /* Store the one attacked peer */
1554 memcpy (&attacked_peer,
1555 &peers[num_mal_peers_sent],
1556 sizeof (struct GNUNET_PeerIdentity));
1558 LOG (GNUNET_ERROR_TYPE_DEBUG,
1559 "Attacked peer is %s\n",
1560 GNUNET_i2s (&attacked_peer));
1562 /* Substitute do_round () with do_mal_round () */
1563 GNUNET_SCHEDULER_cancel (do_round_task);
1564 do_round_task = GNUNET_SCHEDULER_add_now (&do_mal_round, NULL);
1566 else if (0 == mal_type)
1567 { /* Stop acting malicious */
1569 GNUNET_free (mal_peers);
1571 /* Substitute do_mal_round () with do_round () */
1572 GNUNET_SCHEDULER_cancel (do_round_task);
1573 do_round_task = GNUNET_SCHEDULER_add_now (&do_round, NULL);
1583 * Send out PUSHes and PULLs maliciously.
1585 * This is executed regylary.
1588 do_mal_round (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1590 uint32_t num_pushes;
1592 struct GNUNET_TIME_Relative time_next_round;
1594 LOG (GNUNET_ERROR_TYPE_DEBUG, "Going to execute next round maliciously.\n");
1596 /* Do malicious actions */
1598 { /* Try to maximise representation */
1599 num_pushes = min (min (push_limit, /* FIXME: attacked peer */ num_mal_peers), GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE);
1600 for (i = 0 ; i < num_pushes ; i++)
1601 { /* Send PUSHes to attacked peers */
1602 //GNUNET_CONTAINER_multihashmap_iterator_create
1606 // send_pull_request
1609 else if (2 == mal_type)
1611 * Try to partition the network
1612 * Send as many pushes to attacked peer as possible
1614 send_push (&attacked_peer);
1617 /* Schedule next round */
1618 time_next_round = compute_rand_delay (round_interval, 2);
1620 //do_round_task = GNUNET_SCHEDULER_add_delayed (round_interval, &do_mal_round, NULL);
1621 do_round_task = GNUNET_SCHEDULER_add_delayed (time_next_round, &do_mal_round, NULL);
1622 LOG (GNUNET_ERROR_TYPE_DEBUG, "Finished round\n");
1624 #endif /* ENABLE_MALICIOUS */
1628 * Send out PUSHes and PULLs, possibly update #gossip_list, samplers.
1630 * This is executed regylary.
1633 do_round (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1635 LOG (GNUNET_ERROR_TYPE_DEBUG, "Going to execute next round.\n");
1638 unsigned int *permut;
1639 unsigned int n_peers; /* Number of peers we send pushes/pulls to */
1640 struct GNUNET_PeerIdentity peer;
1641 struct GNUNET_PeerIdentity *tmp_peer;
1643 LOG (GNUNET_ERROR_TYPE_DEBUG,
1644 "Printing gossip list:\n");
1645 for (i = 0 ; i < gossip_list_size ; i++)
1646 LOG (GNUNET_ERROR_TYPE_DEBUG,
1647 "\t%s\n", GNUNET_i2s (&gossip_list[i]));
1648 // TODO log lists, ...
1650 /* Would it make sense to have one shuffeled gossip list and then
1651 * to send PUSHes to first alpha peers, PULL requests to next beta peers and
1652 * use the rest to update sampler?
1653 * in essence get random peers with consumption */
1656 if (0 < gossip_list_size)
1658 permut = GNUNET_CRYPTO_random_permute (GNUNET_CRYPTO_QUALITY_STRONG,
1659 (unsigned int) gossip_list_size);
1660 n_peers = ceil (alpha * gossip_list_size);
1661 LOG (GNUNET_ERROR_TYPE_DEBUG,
1662 "Going to send pushes to %u ceil (%f * %u) peers.\n",
1663 n_peers, alpha, gossip_list_size);
1664 for (i = 0 ; i < n_peers ; i++)
1666 peer = gossip_list[permut[i]];
1667 if (0 != GNUNET_CRYPTO_cmp_peer_identity (&own_identity, &peer)) // TODO
1668 { // FIXME if this fails schedule/loop this for later
1672 GNUNET_free (permut);
1676 /* Send PULL requests */
1677 //permut = GNUNET_CRYPTO_random_permute (GNUNET_CRYPTO_QUALITY_STRONG, (unsigned int) sampler_list->size);
1678 n_peers = ceil (beta * gossip_list_size);
1679 LOG (GNUNET_ERROR_TYPE_DEBUG,
1680 "Going to send pulls to %u ceil (%f * %u) peers.\n",
1681 n_peers, beta, gossip_list_size);
1682 for (i = 0 ; i < n_peers ; i++)
1684 tmp_peer = get_rand_peer_ignore_list (gossip_list, gossip_list_size,
1685 pending_pull_reply_list, pending_pull_reply_list_size);
1686 if (NULL != tmp_peer)
1689 GNUNET_free (tmp_peer);
1691 if (0 != GNUNET_CRYPTO_cmp_peer_identity (&own_identity, &peer))
1693 send_pull_request (&peer);
1699 /* Update gossip list */
1701 if ( push_list_size <= alpha * gossip_list_size &&
1702 push_list_size != 0 &&
1703 pull_list_size != 0 )
1705 LOG (GNUNET_ERROR_TYPE_DEBUG, "Update of the gossip list.\n");
1707 uint32_t first_border;
1708 uint32_t second_border;
1710 uint32_t peers_to_clean_size;
1711 struct GNUNET_PeerIdentity *peers_to_clean;
1713 peers_to_clean = NULL;
1714 peers_to_clean_size = 0;
1715 GNUNET_array_grow (peers_to_clean, peers_to_clean_size, gossip_list_size);
1716 memcpy (peers_to_clean,
1718 gossip_list_size * sizeof (struct GNUNET_PeerIdentity));
1720 first_border = ceil (alpha * sampler_size_est_need);
1721 second_border = first_border + ceil (beta * sampler_size_est_need);
1723 GNUNET_array_grow (gossip_list, gossip_list_size, second_border);
1725 for (i = 0 ; i < first_border ; i++)
1726 { // TODO use RPS_sampler_get_n_rand_peers
1727 /* Update gossip list with peers received through PUSHes */
1728 r_index = GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_STRONG,
1730 gossip_list[i] = push_list[r_index];
1731 // TODO change the peer_flags accordingly
1734 for (i = first_border ; i < second_border ; i++)
1736 /* Update gossip list with peers received through PULLs */
1737 r_index = GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_STRONG,
1739 gossip_list[i] = pull_list[r_index];
1740 // TODO change the peer_flags accordingly
1743 for (i = second_border ; i < sampler_size_est_need ; i++)
1745 /* Update gossip list with peers from history */
1746 RPS_sampler_get_n_rand_peers (prot_sampler, hist_update, NULL, 1, GNUNET_NO);
1747 num_hist_update_tasks++;
1748 // TODO change the peer_flags accordingly
1751 for (i = 0 ; i < gossip_list_size ; i++)
1752 rem_from_list (&peers_to_clean, &peers_to_clean_size, &gossip_list[i]);
1754 for (i = 0 ; i < peers_to_clean_size ; i++)
1755 peer_clean (&peers_to_clean[i]);
1757 GNUNET_free (peers_to_clean);
1761 LOG (GNUNET_ERROR_TYPE_DEBUG, "No update of the gossip list.\n");
1763 // TODO independent of that also get some peers from CADET_get_peers()?
1766 /* Update samplers */
1767 for ( i = 0 ; i < push_list_size ; i++ )
1769 LOG (GNUNET_ERROR_TYPE_DEBUG,
1770 "Updating with peer %s from push list\n",
1771 GNUNET_i2s (&push_list[i]));
1772 RPS_sampler_update (prot_sampler, &push_list[i]);
1773 RPS_sampler_update (client_sampler, &push_list[i]);
1774 // TODO set in_flag?
1777 for ( i = 0 ; i < pull_list_size ; i++ )
1779 LOG (GNUNET_ERROR_TYPE_DEBUG,
1780 "Updating with peer %s from pull list\n",
1781 GNUNET_i2s (&pull_list[i]));
1782 RPS_sampler_update (prot_sampler, &push_list[i]);
1783 RPS_sampler_update (client_sampler, &push_list[i]);
1784 // TODO set in_flag?
1788 /* Empty push/pull lists */
1789 GNUNET_array_grow (push_list, push_list_size, 0);
1790 GNUNET_array_grow (pull_list, pull_list_size, 0);
1792 struct GNUNET_TIME_Relative time_next_round;
1794 time_next_round = compute_rand_delay (round_interval, 2);
1796 /* Schedule next round */
1797 //do_round_task = GNUNET_SCHEDULER_add_delayed (round_interval, &do_round, NULL);
1798 do_round_task = GNUNET_SCHEDULER_add_delayed (time_next_round, &do_round, NULL);
1799 LOG (GNUNET_ERROR_TYPE_DEBUG, "Finished round\n");
1804 rps_start (struct GNUNET_SERVER_Handle *server);
1808 * This is called from GNUNET_CADET_get_peers().
1810 * It is called on every peer(ID) that cadet somehow has contact with.
1811 * We use those to initialise the sampler.
1814 init_peer_cb (void *cls,
1815 const struct GNUNET_PeerIdentity *peer,
1816 int tunnel, // "Do we have a tunnel towards this peer?"
1817 unsigned int n_paths, // "Number of known paths towards this peer"
1818 unsigned int best_path) // "How long is the best path?
1819 // (0 = unknown, 1 = ourselves, 2 = neighbor)"
1821 struct PeerOutstandingOp out_op;
1822 struct PeerContext *peer_ctx;
1825 && 0 != GNUNET_CRYPTO_cmp_peer_identity (&own_identity, peer))
1827 LOG (GNUNET_ERROR_TYPE_DEBUG,
1828 "Got peer %s (at %p) from CADET (gossip_list_size: %u)\n",
1829 GNUNET_i2s (peer), peer, gossip_list_size);
1831 // maybe create a function for that
1832 peer_ctx = get_peer_ctx (peer_map, peer);
1833 if (GNUNET_YES != get_peer_flag (peer_ctx, VALID))
1835 if (GNUNET_NO == insert_in_sampler_scheduled (peer_ctx))
1837 out_op.op = insert_in_sampler;
1838 out_op.op_cls = NULL;
1839 GNUNET_array_append (peer_ctx->outstanding_ops,
1840 peer_ctx->num_outstanding_ops,
1844 if (GNUNET_NO == insert_in_gossip_list_scheduled (peer_ctx))
1846 out_op.op = insert_in_gossip_list;
1847 out_op.op_cls = NULL;
1848 GNUNET_array_append (peer_ctx->outstanding_ops,
1849 peer_ctx->num_outstanding_ops,
1853 /* Trigger livelyness test on peer */
1854 check_peer_live (peer_ctx);
1857 // send push/pull to each of those peers?
1863 * Clean the send channel of a peer
1866 peer_clean (const struct GNUNET_PeerIdentity *peer)
1868 struct PeerContext *peer_ctx;
1869 struct GNUNET_CADET_Channel *channel;
1871 if (GNUNET_YES != in_arr (gossip_list, gossip_list_size, peer)
1872 && GNUNET_YES == GNUNET_CONTAINER_multipeermap_contains (peer_map, peer))
1874 peer_ctx = get_peer_ctx (peer_map, peer);
1875 if (NULL != peer_ctx->send_channel)
1877 channel = peer_ctx->send_channel;
1878 peer_ctx->send_channel = NULL;
1879 GNUNET_CADET_channel_destroy (channel);
1886 * Callback used to remove peers from the multipeermap.
1889 peer_remove_cb (void *cls, const struct GNUNET_PeerIdentity *key, void *value)
1891 struct PeerContext *peer_ctx;
1892 const struct GNUNET_CADET_Channel *channel =
1893 (const struct GNUNET_CADET_Channel *) cls;
1894 struct GNUNET_CADET_Channel *recv;
1895 struct GNUNET_CADET_Channel *send;
1897 if (GNUNET_YES == GNUNET_CONTAINER_multipeermap_contains (peer_map, value))
1899 peer_ctx = (struct PeerContext *) value;
1901 if (0 != peer_ctx->num_outstanding_ops)
1902 GNUNET_array_grow (peer_ctx->outstanding_ops,
1903 peer_ctx->num_outstanding_ops,
1906 if (NULL != peer_ctx->mq)
1908 GNUNET_MQ_destroy (peer_ctx->mq);
1909 peer_ctx->mq = NULL;
1913 if (NULL != peer_ctx->is_live_task)
1915 LOG (GNUNET_ERROR_TYPE_DEBUG,
1916 "Trying to cancle is_live_task for peer %s\n",
1918 GNUNET_CADET_notify_transmit_ready_cancel (peer_ctx->is_live_task);
1919 peer_ctx->is_live_task = NULL;
1922 send = peer_ctx->send_channel;
1923 peer_ctx->send_channel = NULL;
1927 GNUNET_CADET_channel_destroy (send);
1930 recv = peer_ctx->send_channel;
1931 peer_ctx->recv_channel = NULL;
1935 GNUNET_CADET_channel_destroy (recv);
1938 if (GNUNET_YES != GNUNET_CONTAINER_multipeermap_remove_all (peer_map, key))
1939 LOG (GNUNET_ERROR_TYPE_WARNING, "removing peer from peer_map failed\n");
1941 GNUNET_free (peer_ctx);
1949 * Task run during shutdown.
1955 shutdown_task (void *cls,
1956 const struct GNUNET_SCHEDULER_TaskContext *tc)
1958 LOG (GNUNET_ERROR_TYPE_DEBUG, "RPS is going down\n");
1960 if (NULL != do_round_task)
1962 GNUNET_SCHEDULER_cancel (do_round_task);
1963 do_round_task = NULL;
1968 if (GNUNET_SYSERR ==
1969 GNUNET_CONTAINER_multipeermap_iterate (peer_map, peer_remove_cb, NULL))
1970 LOG (GNUNET_ERROR_TYPE_WARNING,
1971 "Iterating over peers to disconnect from them was cancelled\n");
1974 GNUNET_NSE_disconnect (nse);
1975 GNUNET_CADET_disconnect (cadet_handle);
1976 RPS_sampler_destroy (prot_sampler);
1977 RPS_sampler_destroy (client_sampler);
1978 LOG (GNUNET_ERROR_TYPE_DEBUG,
1979 "Size of the peermap: %u\n",
1980 GNUNET_CONTAINER_multipeermap_size (peer_map));
1981 GNUNET_break (0 == GNUNET_CONTAINER_multipeermap_size (peer_map));
1982 GNUNET_CONTAINER_multipeermap_destroy (peer_map);
1983 GNUNET_array_grow (gossip_list, gossip_list_size, 0);
1984 GNUNET_array_grow (push_list, push_list_size, 0);
1985 GNUNET_array_grow (pull_list, pull_list_size, 0);
1986 #ifdef ENABLE_MALICIOUS
1987 GNUNET_array_grow (mal_peers, num_mal_peers, 0);
1988 // TODO empty attacked_peers DLL
1989 #endif /* ENABLE_MALICIOUS */
1994 * A client disconnected. Remove all of its data structure entries.
1996 * @param cls closure, NULL
1997 * @param client identification of the client
2000 handle_client_disconnect (void *cls,
2001 struct GNUNET_SERVER_Client * client)
2007 * Handle the channel a peer opens to us.
2009 * @param cls The closure
2010 * @param channel The channel the peer wants to establish
2011 * @param initiator The peer's peer ID
2012 * @param port The port the channel is being established over
2013 * @param options Further options
2016 handle_inbound_channel (void *cls,
2017 struct GNUNET_CADET_Channel *channel,
2018 const struct GNUNET_PeerIdentity *initiator,
2020 enum GNUNET_CADET_ChannelOption options)
2022 struct PeerContext *peer_ctx;
2023 struct GNUNET_PeerIdentity peer;
2026 LOG (GNUNET_ERROR_TYPE_DEBUG,
2027 "New channel was established to us (Peer %s).\n",
2028 GNUNET_i2s (&peer));
2030 GNUNET_assert (NULL != channel);
2032 // we might not even store the recv_channel
2034 peer_ctx = get_peer_ctx (peer_map, &peer);
2035 // FIXME what do we do if a channel is established twice?
2036 // overwrite? Clean old channel? ...?
2037 //if (NULL != peer_ctx->recv_channel)
2039 // peer_ctx->recv_channel = channel;
2041 peer_ctx->recv_channel = channel;
2043 (void) GNUNET_CONTAINER_multipeermap_put (peer_map, &peer, peer_ctx,
2044 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
2046 peer_is_live (peer_ctx);
2048 return NULL; // TODO
2053 * This is called when a remote peer destroys a channel.
2055 * @param cls The closure
2056 * @param channel The channel being closed
2057 * @param channel_ctx The context associated with this channel
2060 cleanup_channel (void *cls,
2061 const struct GNUNET_CADET_Channel *channel,
2064 struct GNUNET_PeerIdentity *peer;
2065 struct PeerContext *peer_ctx;
2067 peer = (struct GNUNET_PeerIdentity *) GNUNET_CADET_channel_get_info (
2068 (struct GNUNET_CADET_Channel *) channel, GNUNET_CADET_OPTION_PEER);
2069 // Guess simply casting isn't the nicest way...
2070 // FIXME wait for cadet to change this function
2071 LOG (GNUNET_ERROR_TYPE_DEBUG, "Cleaning up channel to peer %s\n",
2074 if (GNUNET_YES == GNUNET_CONTAINER_multipeermap_contains (peer_map, peer))
2076 peer_ctx = GNUNET_CONTAINER_multipeermap_get (peer_map, peer);
2078 if (NULL == peer_ctx) /* It could have been removed by shutdown_task */
2081 if (channel == peer_ctx->send_channel)
2082 { /* Peer probably went down */
2083 rem_from_list (&gossip_list, &gossip_list_size, peer);
2084 rem_from_list (&pending_pull_reply_list, &pending_pull_reply_list_size, peer);
2086 /* Somwewhat {ab,re}use the iterator function */
2087 /* Cast to void is ok, because it's used as void in peer_remove_cb */
2088 (void) peer_remove_cb ((void *) channel, peer, peer_ctx);
2090 else /* Other peer doesn't want to send us messages anymore */
2091 peer_ctx->recv_channel = NULL;
2097 * Actually start the service.
2100 rps_start (struct GNUNET_SERVER_Handle *server)
2102 static const struct GNUNET_SERVER_MessageHandler handlers[] = {
2103 {&handle_client_request, NULL, GNUNET_MESSAGE_TYPE_RPS_CS_REQUEST,
2104 sizeof (struct GNUNET_RPS_CS_RequestMessage)},
2105 {&handle_client_seed, NULL, GNUNET_MESSAGE_TYPE_RPS_CS_SEED, 0},
2106 #ifdef ENABLE_MALICIOUS
2107 {&handle_client_act_malicious, NULL, GNUNET_MESSAGE_TYPE_RPS_ACT_MALICIOUS , 0},
2108 #endif /* ENABLE_MALICIOUS */
2112 GNUNET_SERVER_add_handlers (server, handlers);
2113 GNUNET_SERVER_disconnect_notify (server,
2114 &handle_client_disconnect,
2116 LOG (GNUNET_ERROR_TYPE_DEBUG, "Ready to receive requests from clients\n");
2119 do_round_task = GNUNET_SCHEDULER_add_now (&do_round, NULL);
2120 LOG (GNUNET_ERROR_TYPE_DEBUG, "Scheduled first round\n");
2122 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
2129 * Process statistics requests.
2131 * @param cls closure
2132 * @param server the initialized server
2133 * @param c configuration to use
2137 struct GNUNET_SERVER_Handle *server,
2138 const struct GNUNET_CONFIGURATION_Handle *c)
2140 // TODO check what this does -- copied from gnunet-boss
2141 // - seems to work as expected
2142 GNUNET_log_setup ("rps", GNUNET_error_type_to_string (GNUNET_ERROR_TYPE_DEBUG), NULL);
2147 GNUNET_CRYPTO_get_peer_identity (cfg, &own_identity); // TODO check return value
2148 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2149 "STARTING SERVICE (rps) for peer [%s]\n",
2150 GNUNET_i2s (&own_identity));
2151 #ifdef ENABLE_MALICIOUS
2152 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2153 "Malicious execution compiled in.\n");
2154 #endif /* ENABLE_MALICIOUS */
2158 /* Get time interval from the configuration */
2159 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_time (cfg, "RPS",
2163 LOG (GNUNET_ERROR_TYPE_DEBUG, "Failed to read ROUNDINTERVAL from config\n");
2164 GNUNET_SCHEDULER_shutdown ();
2168 /* Get initial size of sampler/gossip list from the configuration */
2169 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_number (cfg, "RPS",
2171 (long long unsigned int *) &sampler_size_est_need))
2173 LOG (GNUNET_ERROR_TYPE_DEBUG, "Failed to read INITSIZE from config\n");
2174 GNUNET_SCHEDULER_shutdown ();
2177 LOG (GNUNET_ERROR_TYPE_DEBUG, "INITSIZE is %" PRIu64 "\n", sampler_size_est_need);
2183 /* connect to NSE */
2184 nse = GNUNET_NSE_connect (cfg, nse_callback, NULL);
2185 // TODO check whether that was successful
2186 LOG (GNUNET_ERROR_TYPE_DEBUG, "Connected to NSE\n");
2192 peer_map = GNUNET_CONTAINER_multipeermap_create (sampler_size_est_need, GNUNET_NO);
2195 /* Initialise cadet */
2196 static const struct GNUNET_CADET_MessageHandler cadet_handlers[] = {
2197 {&handle_peer_push , GNUNET_MESSAGE_TYPE_RPS_PP_PUSH ,
2198 sizeof (struct GNUNET_MessageHeader)},
2199 {&handle_peer_pull_request, GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REQUEST,
2200 sizeof (struct GNUNET_MessageHeader)},
2201 {&handle_peer_pull_reply , GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REPLY , 0},
2205 const uint32_t ports[] = {GNUNET_RPS_CADET_PORT, 0}; // _PORT specified in src/rps/rps.h
2206 cadet_handle = GNUNET_CADET_connect (cfg,
2208 &handle_inbound_channel,
2212 LOG (GNUNET_ERROR_TYPE_DEBUG, "Connected to CADET\n");
2215 /* Initialise sampler */
2216 struct GNUNET_TIME_Relative half_round_interval;
2217 struct GNUNET_TIME_Relative max_round_interval;
2219 half_round_interval = GNUNET_TIME_relative_multiply (round_interval, .5);
2220 max_round_interval = GNUNET_TIME_relative_add (round_interval, half_round_interval);
2222 prot_sampler = RPS_sampler_init (sampler_size_est_need, max_round_interval);
2223 client_sampler = RPS_sampler_init (sampler_size_est_need, max_round_interval);
2225 /* Initialise push and pull maps */
2230 pending_pull_reply_list = NULL;
2231 pending_pull_reply_list_size = 0;
2234 num_hist_update_tasks = 0;
2237 LOG (GNUNET_ERROR_TYPE_DEBUG, "Requesting peers from CADET\n");
2238 GNUNET_CADET_get_peers (cadet_handle, &init_peer_cb, NULL);
2239 // TODO send push/pull to each of those peers?
2247 * The main function for the rps service.
2249 * @param argc number of arguments from the command line
2250 * @param argv command line arguments
2251 * @return 0 ok, 1 on error
2254 main (int argc, char *const *argv)
2256 return (GNUNET_OK ==
2257 GNUNET_SERVICE_run (argc,
2260 GNUNET_SERVICE_OPTION_NONE,
2261 &run, NULL)) ? 0 : 1;
2264 /* end of gnunet-service-rps.c */