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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 * This index is used to point to an attacked peer to
405 * implement the round-robin-ish way to select attacked peers.
407 static struct AttackedPeer *att_peer_index = NULL;
410 * Number of attacked peers
412 static uint32_t num_attacked_peers = 0;
416 * If type is 1 this is the attacked peer
418 static struct GNUNET_PeerIdentity attacked_peer;
421 * The limit of PUSHes we can send in one round.
422 * This is an assumption of the Brahms protocol and either implemented
425 * assumend to be the bandwidth limitation.
427 static uint32_t push_limit = 10000;
428 #endif /* ENABLE_MALICIOUS */
431 /***********************************************************************
433 ***********************************************************************/
440 /***********************************************************************
442 ***********************************************************************/
445 * Set a peer flag of given peer context.
447 #define set_peer_flag(peer_ctx, mask) (peer_ctx->peer_flags |= mask)
450 * Get peer flag of given peer context.
452 #define get_peer_flag(peer_ctx, mask) (peer_ctx->peer_flags & mask ? GNUNET_YES : GNUNET_NO)
455 * Unset flag of given peer context.
457 #define unset_peer_flag(peer_ctx, mask) (peer_ctx->peer_flags &= (~mask))
460 * Compute the minimum of two ints
462 #define min(x, y) ((x < y) ? x : y)
465 * Clean the send channel of a peer
468 peer_clean (const struct GNUNET_PeerIdentity *peer);
472 * Check if peer is already in peer array.
475 in_arr (const struct GNUNET_PeerIdentity *array,
476 unsigned int arr_size,
477 const struct GNUNET_PeerIdentity *peer)
479 GNUNET_assert (NULL != peer);
484 GNUNET_assert (NULL != array);
488 for (i = 0; i < arr_size ; i++)
489 if (0 == GNUNET_CRYPTO_cmp_peer_identity (&array[i], peer))
496 * Print peerlist to log.
499 print_peer_list (struct GNUNET_PeerIdentity *list, unsigned int len)
503 LOG (GNUNET_ERROR_TYPE_DEBUG,
504 "Printing peer list of length %u at %p:\n",
507 for (i = 0 ; i < len ; i++)
509 LOG (GNUNET_ERROR_TYPE_DEBUG,
511 i, GNUNET_i2s (&list[i]));
517 * Remove peer from list.
520 rem_from_list (struct GNUNET_PeerIdentity **peer_list,
521 unsigned int *list_size,
522 const struct GNUNET_PeerIdentity *peer)
525 struct GNUNET_PeerIdentity *tmp;
529 LOG (GNUNET_ERROR_TYPE_DEBUG,
530 "Removing peer %s from list at %p\n",
534 for ( i = 0 ; i < *list_size ; i++ )
536 if (0 == GNUNET_CRYPTO_cmp_peer_identity (&tmp[i], peer))
538 if (i < *list_size -1)
539 { /* Not at the last entry -- shift peers left */
540 memcpy (&tmp[i], &tmp[i +1],
541 ((*list_size) - i -1) * sizeof (struct GNUNET_PeerIdentity));
543 /* Remove last entry (should be now useless PeerID) */
544 GNUNET_array_grow (tmp, *list_size, (*list_size) -1);
551 * Get random peer from the given list but don't return one from the @a ignore_list.
553 struct GNUNET_PeerIdentity *
554 get_rand_peer_ignore_list (const struct GNUNET_PeerIdentity *peer_list,
556 const struct GNUNET_PeerIdentity *ignore_list,
557 uint32_t ignore_size)
561 struct GNUNET_PeerIdentity *tmp_peer_list;
562 struct GNUNET_PeerIdentity *peer;
564 GNUNET_assert (NULL != peer_list);
569 tmp_peer_list = NULL;
570 GNUNET_array_grow (tmp_peer_list, tmp_size, list_size);
571 memcpy (tmp_peer_list,
573 list_size * sizeof (struct GNUNET_PeerIdentity));
574 peer = GNUNET_new (struct GNUNET_PeerIdentity);
577 * Choose the r_index of the peer we want to return
578 * at random from the interval of the gossip list
580 r_index = GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_STRONG,
582 *peer = tmp_peer_list[r_index];
584 while (in_arr (ignore_list, ignore_size, peer))
586 rem_from_list (&tmp_peer_list, &tmp_size, peer);
588 print_peer_list (tmp_peer_list, tmp_size);
597 * Choose the r_index of the peer we want to return
598 * at random from the interval of the gossip list
600 r_index = GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_STRONG,
602 *peer = tmp_peer_list[r_index];
606 GNUNET_array_grow (tmp_peer_list, tmp_size, 0);
613 * Get the context of a peer. If not existing, create.
616 get_peer_ctx (struct GNUNET_CONTAINER_MultiPeerMap *peer_map,
617 const struct GNUNET_PeerIdentity *peer)
619 struct PeerContext *ctx;
621 if ( GNUNET_YES == GNUNET_CONTAINER_multipeermap_contains (peer_map, peer))
623 ctx = GNUNET_CONTAINER_multipeermap_get (peer_map, peer);
627 ctx = GNUNET_new (struct PeerContext);
630 ctx->send_channel = NULL;
631 ctx->recv_channel = NULL;
632 ctx->outstanding_ops = NULL;
633 ctx->num_outstanding_ops = 0;
634 ctx->is_live_task = NULL;
635 ctx->peer_id = *peer;
636 (void) GNUNET_CONTAINER_multipeermap_put (peer_map, peer, ctx,
637 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
644 * Put random peer from sampler into the gossip list as history update.
647 hist_update (void *cls, struct GNUNET_PeerIdentity *ids, uint32_t num_peers)
649 GNUNET_assert (1 == num_peers);
651 if (gossip_list_size < sampler_size_est_need)
652 GNUNET_array_append (gossip_list, gossip_list_size, *ids);
654 if (0 < num_hist_update_tasks)
655 num_hist_update_tasks--;
660 * Set the peer flag to living and call the outstanding operations on this peer.
663 peer_is_live (struct PeerContext *peer_ctx)
665 struct GNUNET_PeerIdentity *peer;
667 /* Cancle is_live_task if still scheduled */
668 if (NULL != peer_ctx->is_live_task)
670 GNUNET_CADET_notify_transmit_ready_cancel (peer_ctx->is_live_task);
671 peer_ctx->is_live_task = NULL;
674 peer = &peer_ctx->peer_id;
675 set_peer_flag (peer_ctx, VALID);
677 LOG (GNUNET_ERROR_TYPE_DEBUG, "Peer %s is live\n", GNUNET_i2s (peer));
679 if (0 < peer_ctx->num_outstanding_ops)
680 { /* Call outstanding operations */
683 for (i = 0 ; i < peer_ctx->num_outstanding_ops ; i++)
684 peer_ctx->outstanding_ops[i].op (peer_ctx->outstanding_ops[i].op_cls, peer);
685 GNUNET_array_grow (peer_ctx->outstanding_ops, peer_ctx->num_outstanding_ops, 0);
693 * Callback that is called when a channel was effectively established.
694 * This is given to ntfy_tmt_rdy and called when the channel was
695 * successfully established.
698 cadet_ntfy_tmt_rdy_cb (void *cls, size_t size, void *buf)
700 struct PeerContext *peer_ctx = (struct PeerContext *) cls;
702 peer_ctx->is_live_task = NULL;
703 LOG (GNUNET_ERROR_TYPE_DEBUG,
704 "Set ->is_live_task = NULL for peer %s\n",
705 GNUNET_i2s (&peer_ctx->peer_id));
710 peer_is_live (peer_ctx);
714 LOG (GNUNET_ERROR_TYPE_WARNING,
715 "Problems establishing a connection to peer %s in order to check liveliness\n",
716 GNUNET_i2s (&peer_ctx->peer_id));
717 // TODO reschedule? cleanup?
720 //if (NULL != peer_ctx->is_live_task)
722 // LOG (GNUNET_ERROR_TYPE_DEBUG,
723 // "Trying to cancle is_live_task for peer %s\n",
724 // GNUNET_i2s (&peer_ctx->peer_id));
725 // GNUNET_CADET_notify_transmit_ready_cancel (peer_ctx->is_live_task);
726 // peer_ctx->is_live_task = NULL;
734 * Get the channel of a peer. If not existing, create.
736 struct GNUNET_CADET_Channel *
737 get_channel (struct GNUNET_CONTAINER_MultiPeerMap *peer_map,
738 const struct GNUNET_PeerIdentity *peer)
740 struct PeerContext *peer_ctx;
742 peer_ctx = get_peer_ctx (peer_map, peer);
744 GNUNET_assert (NULL == peer_ctx->is_live_task);
746 if (NULL == peer_ctx->send_channel)
748 LOG (GNUNET_ERROR_TYPE_DEBUG,
749 "Trying to establish channel to peer %s\n",
752 peer_ctx->send_channel =
753 GNUNET_CADET_channel_create (cadet_handle,
756 GNUNET_RPS_CADET_PORT,
757 GNUNET_CADET_OPTION_RELIABLE);
759 // do I have to explicitly put it in the peer_map?
760 (void) GNUNET_CONTAINER_multipeermap_put
764 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
766 return peer_ctx->send_channel;
771 * Get the message queue of a specific peer.
773 * If we already have a message queue open to this client,
774 * simply return it, otherways create one.
776 struct GNUNET_MQ_Handle *
777 get_mq (struct GNUNET_CONTAINER_MultiPeerMap *peer_map,
778 const struct GNUNET_PeerIdentity *peer_id)
780 struct PeerContext *peer_ctx;
782 peer_ctx = get_peer_ctx (peer_map, peer_id);
784 GNUNET_assert (NULL == peer_ctx->is_live_task);
786 if (NULL == peer_ctx->mq)
788 (void) get_channel (peer_map, peer_id);
789 peer_ctx->mq = GNUNET_CADET_mq_create (peer_ctx->send_channel);
790 //do I have to explicitly put it in the peer_map?
791 (void) GNUNET_CONTAINER_multipeermap_put (peer_map, peer_id, peer_ctx,
792 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
799 * Issue check whether peer is live
801 * @param peer_ctx the context of the peer
804 check_peer_live (struct PeerContext *peer_ctx)
806 (void) get_channel (peer_map, &peer_ctx->peer_id);
807 LOG (GNUNET_ERROR_TYPE_DEBUG,
808 "Get informed about peer %s getting live\n",
809 GNUNET_i2s (&peer_ctx->peer_id));
810 if (NULL == peer_ctx->is_live_task)
812 peer_ctx->is_live_task =
813 GNUNET_CADET_notify_transmit_ready (peer_ctx->send_channel,
815 GNUNET_TIME_UNIT_FOREVER_REL,
816 sizeof (struct GNUNET_MessageHeader),
817 cadet_ntfy_tmt_rdy_cb,
822 LOG (GNUNET_ERROR_TYPE_DEBUG,
823 "Already waiting for notification\n");
829 * Sum all time relatives of an array.
831 struct GNUNET_TIME_Relative
832 T_relative_sum (const struct GNUNET_TIME_Relative *rel_array, uint32_t arr_size)
834 struct GNUNET_TIME_Relative sum;
837 sum = GNUNET_TIME_UNIT_ZERO;
838 for ( i = 0 ; i < arr_size ; i++ )
840 sum = GNUNET_TIME_relative_add (sum, rel_array[i]);
847 * Compute the average of given time relatives.
849 struct GNUNET_TIME_Relative
850 T_relative_avg (const struct GNUNET_TIME_Relative *rel_array, uint32_t arr_size)
852 return GNUNET_TIME_relative_divide (T_relative_sum (rel_array, arr_size), arr_size);
857 * Insert PeerID in #pull_list
859 * Called once we know a peer is live.
862 insert_in_pull_list (void *cls, const struct GNUNET_PeerIdentity *peer)
864 if (GNUNET_NO == in_arr (pull_list, pull_list_size, peer))
865 GNUNET_array_append (pull_list, pull_list_size, *peer);
871 * Check whether #insert_in_pull_list was already scheduled
874 insert_in_pull_list_scheduled (const struct PeerContext *peer_ctx)
878 for ( i = 0 ; i < peer_ctx->num_outstanding_ops ; i++ )
879 if (insert_in_pull_list == peer_ctx->outstanding_ops[i].op)
886 * Insert PeerID in #gossip_list
888 * Called once we know a peer is live.
891 insert_in_gossip_list (void *cls, const struct GNUNET_PeerIdentity *peer)
893 if (GNUNET_NO == in_arr (gossip_list, gossip_list_size, peer))
894 GNUNET_array_append (gossip_list, gossip_list_size, *peer);
896 (void) get_channel (peer_map, peer);
900 * Check whether #insert_in_gossip_list was already scheduled
903 insert_in_gossip_list_scheduled (const struct PeerContext *peer_ctx)
907 for ( i = 0 ; i < peer_ctx->num_outstanding_ops ; i++ )
908 if (insert_in_gossip_list == peer_ctx->outstanding_ops[i].op)
915 * Update sampler with given PeerID.
918 insert_in_sampler (void *cls, const struct GNUNET_PeerIdentity *peer)
920 LOG (GNUNET_ERROR_TYPE_DEBUG,
921 "Updating samplers with peer %s from insert_in_sampler()\n",
923 RPS_sampler_update (prot_sampler, peer);
924 RPS_sampler_update (client_sampler, peer);
929 * Check whether #insert_in_sampler was already scheduled
932 insert_in_sampler_scheduled (const struct PeerContext *peer_ctx)
936 for (i = 0 ; i < peer_ctx->num_outstanding_ops ; i++)
937 if (insert_in_sampler== peer_ctx->outstanding_ops[i].op)
944 * Wrapper around #RPS_sampler_resize()
946 * If we do not have enough sampler elements, double current sampler size
947 * If we have more than enough sampler elements, halv current sampler size
950 resize_wrapper (struct RPS_Sampler *sampler, uint32_t new_size)
952 unsigned int sampler_size;
955 // TODO respect the min, max
956 sampler_size = RPS_sampler_get_size (sampler);
957 if (sampler_size > new_size * 4)
959 RPS_sampler_resize (sampler, sampler_size / 2);
961 else if (sampler_size < new_size)
963 RPS_sampler_resize (sampler, sampler_size * 2);
965 LOG (GNUNET_ERROR_TYPE_DEBUG, "sampler_size is now %u\n", sampler_size);
970 * Wrapper around #RPS_sampler_resize() resizing the client sampler
973 client_resize_wrapper ()
975 uint32_t bigger_size;
976 unsigned int sampler_size;
980 sampler_size = RPS_sampler_get_size (client_sampler);
982 if (sampler_size_est_need > sampler_size_client_need)
983 bigger_size = sampler_size_est_need;
985 bigger_size = sampler_size_client_need;
987 // TODO respect the min, max
988 resize_wrapper (client_sampler, bigger_size);
989 LOG (GNUNET_ERROR_TYPE_DEBUG, "sampler_size is now %u\n", sampler_size);
994 * Estimate request rate
996 * Called every time we receive a request from the client.
1001 struct GNUNET_TIME_Relative max_round_duration;
1003 if (request_deltas_size > req_counter)
1005 if ( 1 < req_counter)
1007 /* Shift last request deltas to the right */
1008 memcpy (&request_deltas[1],
1010 (req_counter - 1) * sizeof (struct GNUNET_TIME_Relative));
1012 /* Add current delta to beginning */
1014 GNUNET_TIME_absolute_get_difference (last_request,
1015 GNUNET_TIME_absolute_get ());
1016 request_rate = T_relative_avg (request_deltas, req_counter);
1018 /* Compute the duration a round will maximally take */
1019 max_round_duration =
1020 GNUNET_TIME_relative_add (round_interval,
1021 GNUNET_TIME_relative_divide (round_interval, 2));
1023 /* Set the estimated size the sampler has to have to
1024 * satisfy the current client request rate */
1025 sampler_size_client_need =
1026 max_round_duration.rel_value_us / request_rate.rel_value_us;
1028 /* Resize the sampler */
1029 client_resize_wrapper ();
1031 last_request = GNUNET_TIME_absolute_get ();
1035 /***********************************************************************
1037 ***********************************************************************/
1044 * Function called by NSE.
1046 * Updates sizes of sampler list and gossip list and adapt those lists
1050 nse_callback (void *cls, struct GNUNET_TIME_Absolute timestamp,
1051 double logestimate, double std_dev)
1054 //double scale; // TODO this might go gloabal/config
1056 LOG (GNUNET_ERROR_TYPE_DEBUG,
1057 "Received a ns estimate - logest: %f, std_dev: %f (old_size: %u)\n",
1058 logestimate, std_dev, RPS_sampler_get_size (prot_sampler));
1060 estimate = GNUNET_NSE_log_estimate_to_n (logestimate);
1061 // GNUNET_NSE_log_estimate_to_n (logestimate);
1062 estimate = pow (estimate, 1.0 / 3);
1063 // TODO add if std_dev is a number
1064 // estimate += (std_dev * scale);
1065 if (2 < ceil (estimate))
1067 LOG (GNUNET_ERROR_TYPE_DEBUG, "Changing estimate to %f\n", estimate);
1068 sampler_size_est_need = estimate;
1070 LOG (GNUNET_ERROR_TYPE_DEBUG, "Not using estimate %f\n", estimate);
1072 /* If the NSE has changed adapt the lists accordingly */
1073 resize_wrapper (prot_sampler, sampler_size_est_need);
1074 client_resize_wrapper ();
1079 * Callback called once the requested PeerIDs are ready.
1081 * Sends those to the requesting client.
1083 void client_respond (void *cls,
1084 struct GNUNET_PeerIdentity *ids, uint32_t num_peers)
1086 LOG (GNUNET_ERROR_TYPE_DEBUG, "sampler returned %" PRIX32 " peers\n", num_peers);
1087 struct GNUNET_MQ_Envelope *ev;
1088 struct GNUNET_RPS_CS_ReplyMessage *out_msg;
1089 struct GNUNET_SERVER_Client *client;
1090 uint32_t size_needed;
1091 struct client_ctx *cli_ctx;
1093 client = (struct GNUNET_SERVER_Client *) cls;
1095 size_needed = sizeof (struct GNUNET_RPS_CS_ReplyMessage) +
1096 num_peers * sizeof (struct GNUNET_PeerIdentity);
1098 GNUNET_assert (GNUNET_SERVER_MAX_MESSAGE_SIZE >= size_needed);
1100 ev = GNUNET_MQ_msg_extra (out_msg,
1101 num_peers * sizeof (struct GNUNET_PeerIdentity),
1102 GNUNET_MESSAGE_TYPE_RPS_CS_REPLY);
1103 out_msg->num_peers = htonl (num_peers);
1105 memcpy (&out_msg[1],
1107 num_peers * sizeof (struct GNUNET_PeerIdentity));
1110 cli_ctx = GNUNET_SERVER_client_get_user_context (client, struct client_ctx);
1111 if (NULL == cli_ctx) {
1112 cli_ctx = GNUNET_new (struct client_ctx);
1113 cli_ctx->mq = GNUNET_MQ_queue_for_server_client (client);
1114 GNUNET_SERVER_client_set_user_context (client, cli_ctx);
1117 GNUNET_MQ_send (cli_ctx->mq, ev);
1122 * Handle RPS request from the client.
1124 * @param cls closure
1125 * @param client identification of the client
1126 * @param message the actual message
1129 handle_client_request (void *cls,
1130 struct GNUNET_SERVER_Client *client,
1131 const struct GNUNET_MessageHeader *message)
1133 struct GNUNET_RPS_CS_RequestMessage *msg;
1135 uint32_t size_needed;
1138 msg = (struct GNUNET_RPS_CS_RequestMessage *) message;
1140 num_peers = ntohl (msg->num_peers);
1141 size_needed = sizeof (struct GNUNET_RPS_CS_RequestMessage) +
1142 num_peers * sizeof (struct GNUNET_PeerIdentity);
1144 if (GNUNET_SERVER_MAX_MESSAGE_SIZE < size_needed)
1146 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
1150 for (i = 0 ; i < num_peers ; i++)
1153 LOG (GNUNET_ERROR_TYPE_DEBUG, "Client requested %" PRIX32 " random peer(s).\n", num_peers);
1155 RPS_sampler_get_n_rand_peers (client_sampler, client_respond,
1156 client, num_peers, GNUNET_YES);
1158 GNUNET_SERVER_receive_done (client,
1164 * Handle seed from the client.
1166 * @param cls closure
1167 * @param client identification of the client
1168 * @param message the actual message
1171 handle_client_seed (void *cls,
1172 struct GNUNET_SERVER_Client *client,
1173 const struct GNUNET_MessageHeader *message)
1175 struct GNUNET_RPS_CS_SeedMessage *in_msg;
1176 struct GNUNET_PeerIdentity *peers;
1180 if (sizeof (struct GNUNET_RPS_CS_SeedMessage) > ntohs (message->size))
1182 GNUNET_break_op (0);
1183 GNUNET_SERVER_receive_done (client,
1187 in_msg = (struct GNUNET_RPS_CS_SeedMessage *) message;
1188 num_peers = ntohl (in_msg->num_peers);
1189 peers = (struct GNUNET_PeerIdentity *) &in_msg[1];
1190 //peers = GNUNET_new_array (num_peers, struct GNUNET_PeerIdentity);
1191 //memcpy (peers, &in_msg[1], num_peers * sizeof (struct GNUNET_PeerIdentity));
1193 if ((ntohs (message->size) - sizeof (struct GNUNET_RPS_CS_SeedMessage)) /
1194 sizeof (struct GNUNET_PeerIdentity) != num_peers)
1196 GNUNET_break_op (0);
1197 GNUNET_SERVER_receive_done (client,
1201 LOG (GNUNET_ERROR_TYPE_DEBUG,
1202 "Client seeded peers:\n");
1203 print_peer_list (peers, num_peers);
1205 // TODO check for validity of ids
1207 for (i = 0 ; i < num_peers ; i++)
1209 LOG (GNUNET_ERROR_TYPE_DEBUG,
1210 "Updating samplers with seed %" PRIX32 ": %s\n",
1212 GNUNET_i2s (&peers[i]));
1214 RPS_sampler_update (prot_sampler, &peers[i]);
1215 RPS_sampler_update (client_sampler, &peers[i]);
1218 //GNUNET_free (peers);
1220 GNUNET_SERVER_receive_done (client,
1226 * Handle a PUSH message from another peer.
1228 * Check the proof of work and store the PeerID
1229 * in the temporary list for pushed PeerIDs.
1231 * @param cls Closure
1232 * @param channel The channel the PUSH was received over
1233 * @param channel_ctx The context associated with this channel
1234 * @param msg The message header
1237 handle_peer_push (void *cls,
1238 struct GNUNET_CADET_Channel *channel,
1240 const struct GNUNET_MessageHeader *msg)
1242 const struct GNUNET_PeerIdentity *peer;
1244 // (check the proof of work)
1246 peer = (const struct GNUNET_PeerIdentity *) GNUNET_CADET_channel_get_info (channel, GNUNET_CADET_OPTION_PEER);
1247 // FIXME wait for cadet to change this function
1248 LOG (GNUNET_ERROR_TYPE_DEBUG, "PUSH received (%s)\n", GNUNET_i2s (peer));
1250 #ifdef ENABLE_MALICIOUS
1251 struct AttackedPeer *tmp_att_peer;
1253 tmp_att_peer = GNUNET_new (struct AttackedPeer);
1254 memcpy (&tmp_att_peer->peer_id, peer, sizeof (struct GNUNET_PeerIdentity));
1256 { /* Try to maximise representation */
1257 // TODO Check whether we already have that peer
1258 GNUNET_CONTAINER_DLL_insert (att_peers_head, att_peers_tail, tmp_att_peer);
1263 else if (2 == mal_type)
1264 { /* We attack one single well-known peer - simply ignore */
1268 #endif /* ENABLE_MALICIOUS */
1270 /* Add the sending peer to the push_list */
1271 if (GNUNET_NO == in_arr (push_list, push_list_size, peer))
1272 GNUNET_array_append (push_list, push_list_size, *peer);
1279 * Handle PULL REQUEST request message from another peer.
1281 * Reply with the gossip list of PeerIDs.
1283 * @param cls Closure
1284 * @param channel The channel the PUSH was received over
1285 * @param channel_ctx The context associated with this channel
1286 * @param msg The message header
1289 handle_peer_pull_request (void *cls,
1290 struct GNUNET_CADET_Channel *channel,
1292 const struct GNUNET_MessageHeader *msg)
1294 struct GNUNET_PeerIdentity *peer;
1296 struct GNUNET_MQ_Handle *mq;
1297 struct GNUNET_MQ_Envelope *ev;
1298 struct GNUNET_RPS_P2P_PullReplyMessage *out_msg;
1301 peer = (struct GNUNET_PeerIdentity *)
1302 GNUNET_CADET_channel_get_info (channel,
1303 GNUNET_CADET_OPTION_PEER);
1304 // FIXME wait for cadet to change this function
1306 /* Compute actual size */
1307 send_size = sizeof (struct GNUNET_RPS_P2P_PullReplyMessage) +
1308 gossip_list_size * sizeof (struct GNUNET_PeerIdentity);
1310 if (GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE < send_size)
1311 /* Compute number of peers to send
1312 * If too long, simply truncate */
1313 // TODO select random ones via permutation
1315 (GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE -
1316 sizeof (struct GNUNET_RPS_P2P_PullReplyMessage)) /
1317 sizeof (struct GNUNET_PeerIdentity);
1319 send_size = gossip_list_size;
1321 LOG (GNUNET_ERROR_TYPE_DEBUG,
1322 "PULL REQUEST from peer %s received, going to send %u peers\n",
1323 GNUNET_i2s (peer), send_size);
1325 mq = get_mq (peer_map, peer);
1327 ev = GNUNET_MQ_msg_extra (out_msg,
1328 send_size * sizeof (struct GNUNET_PeerIdentity),
1329 GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REPLY);
1330 //out_msg->num_peers = htonl (gossip_list_size);
1331 out_msg->num_peers = htonl (send_size);
1332 memcpy (&out_msg[1], gossip_list,
1333 send_size * sizeof (struct GNUNET_PeerIdentity));
1335 GNUNET_MQ_send (mq, ev);
1342 * Handle PULL REPLY message from another peer.
1344 * Check whether we sent a corresponding request and
1345 * whether this reply is the first one.
1347 * @param cls Closure
1348 * @param channel The channel the PUSH was received over
1349 * @param channel_ctx The context associated with this channel
1350 * @param msg The message header
1353 handle_peer_pull_reply (void *cls,
1354 struct GNUNET_CADET_Channel *channel,
1356 const struct GNUNET_MessageHeader *msg)
1358 LOG (GNUNET_ERROR_TYPE_DEBUG, "PULL REPLY received\n");
1360 struct GNUNET_RPS_P2P_PullReplyMessage *in_msg;
1361 struct GNUNET_PeerIdentity *peers;
1362 struct PeerContext *peer_ctx;
1363 struct GNUNET_PeerIdentity *sender;
1364 struct PeerContext *sender_ctx;
1365 struct PeerOutstandingOp out_op;
1368 /* Check for protocol violation */
1369 if (sizeof (struct GNUNET_RPS_P2P_PullReplyMessage) > ntohs (msg->size))
1371 GNUNET_break_op (0);
1372 return GNUNET_SYSERR;
1375 in_msg = (struct GNUNET_RPS_P2P_PullReplyMessage *) msg;
1376 if ((ntohs (msg->size) - sizeof (struct GNUNET_RPS_P2P_PullReplyMessage)) /
1377 sizeof (struct GNUNET_PeerIdentity) != ntohl (in_msg->num_peers))
1379 LOG (GNUNET_ERROR_TYPE_ERROR,
1380 "message says it sends %" PRIu64 " peers, have space for %i peers\n",
1381 ntohl (in_msg->num_peers),
1382 (ntohs (msg->size) - sizeof (struct GNUNET_RPS_P2P_PullReplyMessage)) /
1383 sizeof (struct GNUNET_PeerIdentity));
1384 GNUNET_break_op (0);
1385 return GNUNET_SYSERR;
1388 sender = (struct GNUNET_PeerIdentity *) GNUNET_CADET_channel_get_info (
1389 (struct GNUNET_CADET_Channel *) channel, GNUNET_CADET_OPTION_PEER);
1390 // Guess simply casting isn't the nicest way...
1391 // FIXME wait for cadet to change this function
1392 sender_ctx = get_peer_ctx (peer_map, sender);
1394 if (GNUNET_YES == get_peer_flag (sender_ctx, PULL_REPLY_PENDING))
1396 GNUNET_break_op (0);
1401 /* Do actual logic */
1402 peers = (struct GNUNET_PeerIdentity *) &msg[1];
1403 for (i = 0 ; i < ntohl (in_msg->num_peers) ; i++)
1405 peer_ctx = get_peer_ctx (peer_map, &peers[i]);
1406 if (GNUNET_YES == get_peer_flag (peer_ctx, VALID)
1407 || NULL != peer_ctx->send_channel
1408 || NULL != peer_ctx->recv_channel)
1410 if (GNUNET_NO == in_arr (pull_list, pull_list_size, &peers[i])
1411 && 0 != GNUNET_CRYPTO_cmp_peer_identity (&own_identity, &peers[i]))
1412 GNUNET_array_append (pull_list, pull_list_size, peers[i]);
1414 else if (GNUNET_NO == insert_in_pull_list_scheduled (peer_ctx))
1416 out_op.op = insert_in_pull_list;
1417 out_op.op_cls = NULL;
1418 GNUNET_array_append (peer_ctx->outstanding_ops,
1419 peer_ctx->num_outstanding_ops,
1421 check_peer_live (peer_ctx);
1425 unset_peer_flag (sender_ctx, PULL_REPLY_PENDING);
1426 rem_from_list (&pending_pull_reply_list, &pending_pull_reply_list_size, sender);
1433 * Compute a random delay.
1434 * A uniformly distributed value between mean + spread and mean - spread.
1436 * For example for mean 4 min and spread 2 the minimum is (4 min - (1/2 * 4 min))
1437 * It would return a random value between 2 and 6 min.
1439 * @param mean the mean
1440 * @param spread the inverse amount of deviation from the mean
1442 static struct GNUNET_TIME_Relative
1443 compute_rand_delay (struct GNUNET_TIME_Relative mean, unsigned int spread)
1445 struct GNUNET_TIME_Relative half_interval;
1446 struct GNUNET_TIME_Relative ret;
1447 unsigned int rand_delay;
1448 unsigned int max_rand_delay;
1452 LOG (GNUNET_ERROR_TYPE_WARNING,
1453 "Not accepting spread of 0\n");
1457 /* Compute random time value between spread * mean and spread * mean */
1458 half_interval = GNUNET_TIME_relative_divide (mean, spread);
1460 max_rand_delay = GNUNET_TIME_UNIT_FOREVER_REL.rel_value_us / mean.rel_value_us * (2/spread);
1462 * Compute random value between (0 and 1) * round_interval
1463 * via multiplying round_interval with a 'fraction' (0 to value)/value
1465 rand_delay = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, max_rand_delay);
1466 ret = GNUNET_TIME_relative_multiply (mean, rand_delay);
1467 ret = GNUNET_TIME_relative_divide (ret, max_rand_delay);
1468 ret = GNUNET_TIME_relative_add (ret, half_interval);
1470 if (GNUNET_TIME_UNIT_FOREVER_REL.rel_value_us == ret.rel_value_us)
1471 LOG (GNUNET_ERROR_TYPE_WARNING,
1472 "Returning FOREVER_REL\n");
1479 * Send single pull request
1481 * @param peer_id the peer to send the pull request to.
1484 send_pull_request (struct GNUNET_PeerIdentity *peer_id)
1486 struct GNUNET_MQ_Envelope *ev;
1487 struct GNUNET_MQ_Handle *mq;
1489 LOG (GNUNET_ERROR_TYPE_DEBUG,
1490 "Sending PULL request to peer %s of gossiped list.\n",
1491 GNUNET_i2s (peer_id));
1493 GNUNET_array_append (pending_pull_reply_list, pending_pull_reply_list_size, *peer_id);
1495 ev = GNUNET_MQ_msg_header (GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REQUEST);
1496 mq = get_mq (peer_map, peer_id);
1497 GNUNET_MQ_send (mq, ev);
1504 * @param peer_id the peer to send the push to.
1507 send_push (struct GNUNET_PeerIdentity *peer_id)
1509 struct GNUNET_MQ_Envelope *ev;
1510 struct GNUNET_MQ_Handle *mq;
1512 LOG (GNUNET_ERROR_TYPE_DEBUG,
1513 "Sending PUSH to peer %s of gossiped list.\n",
1514 GNUNET_i2s (peer_id));
1516 ev = GNUNET_MQ_msg_header (GNUNET_MESSAGE_TYPE_RPS_PP_PUSH);
1517 mq = get_mq (peer_map, peer_id);
1518 GNUNET_MQ_send (mq, ev);
1523 do_round (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
1526 do_mal_round (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
1529 #ifdef ENABLE_MALICIOUS
1531 * Turn RPS service to act malicious.
1533 * @param cls Closure
1534 * @param channel The channel the PUSH was received over
1535 * @param channel_ctx The context associated with this channel
1536 * @param msg The message header
1539 handle_client_act_malicious (void *cls,
1540 struct GNUNET_SERVER_Client *client,
1541 const struct GNUNET_MessageHeader *msg)
1543 struct GNUNET_RPS_CS_ActMaliciousMessage *in_msg;
1544 struct GNUNET_PeerIdentity *peers;
1545 uint32_t num_mal_peers_sent;
1546 uint32_t num_mal_peers_old;
1548 /* Check for protocol violation */
1549 if (sizeof (struct GNUNET_RPS_CS_ActMaliciousMessage) > ntohs (msg->size))
1551 GNUNET_break_op (0);
1554 in_msg = (struct GNUNET_RPS_CS_ActMaliciousMessage *) msg;
1555 if ((ntohs (msg->size) - sizeof (struct GNUNET_RPS_CS_ActMaliciousMessage)) /
1556 sizeof (struct GNUNET_PeerIdentity) != ntohl (in_msg->num_peers))
1558 LOG (GNUNET_ERROR_TYPE_ERROR,
1559 "message says it sends %" PRIu64 " peers, have space for %i peers\n",
1560 ntohl (in_msg->num_peers),
1561 (ntohs (msg->size) - sizeof (struct GNUNET_RPS_CS_ActMaliciousMessage)) /
1562 sizeof (struct GNUNET_PeerIdentity));
1563 GNUNET_break_op (0);
1567 /* Do actual logic */
1568 peers = (struct GNUNET_PeerIdentity *) &msg[1];
1569 mal_type = ntohl (in_msg->type);
1571 LOG (GNUNET_ERROR_TYPE_DEBUG,
1572 "Now acting malicious type %" PRIu32 "\n",
1576 { /* Try to maximise representation */
1577 /* Add other malicious peers to those we already know */
1578 num_mal_peers_sent = ntohl (in_msg->num_peers);
1579 num_mal_peers_old = num_mal_peers;
1580 GNUNET_array_grow (mal_peers,
1582 num_mal_peers + num_mal_peers_sent);
1583 memcpy (&mal_peers[num_mal_peers_old],
1585 num_mal_peers_sent * sizeof (struct GNUNET_PeerIdentity));
1587 /* Substitute do_round () with do_mal_round () */
1588 GNUNET_SCHEDULER_cancel (do_round_task);
1589 do_round_task = GNUNET_SCHEDULER_add_now (&do_mal_round, NULL);
1591 else if (2 == mal_type)
1592 { /* Try to partition the network */
1593 /* Add other malicious peers to those we already know */
1594 num_mal_peers_sent = ntohl (in_msg->num_peers) - 1;
1595 num_mal_peers_old = num_mal_peers;
1596 GNUNET_array_grow (mal_peers,
1598 num_mal_peers + num_mal_peers_sent);
1599 memcpy (&mal_peers[num_mal_peers_old],
1601 num_mal_peers_sent * sizeof (struct GNUNET_PeerIdentity));
1603 /* Store the one attacked peer */
1604 memcpy (&attacked_peer,
1605 &peers[num_mal_peers_sent],
1606 sizeof (struct GNUNET_PeerIdentity));
1608 LOG (GNUNET_ERROR_TYPE_DEBUG,
1609 "Attacked peer is %s\n",
1610 GNUNET_i2s (&attacked_peer));
1612 /* Substitute do_round () with do_mal_round () */
1613 GNUNET_SCHEDULER_cancel (do_round_task);
1614 do_round_task = GNUNET_SCHEDULER_add_now (&do_mal_round, NULL);
1616 else if (0 == mal_type)
1617 { /* Stop acting malicious */
1619 GNUNET_free (mal_peers);
1621 /* Substitute do_mal_round () with do_round () */
1622 GNUNET_SCHEDULER_cancel (do_round_task);
1623 do_round_task = GNUNET_SCHEDULER_add_now (&do_round, NULL);
1633 * Send out PUSHes and PULLs maliciously.
1635 * This is executed regylary.
1638 do_mal_round (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1640 uint32_t num_pushes;
1642 struct GNUNET_TIME_Relative time_next_round;
1643 struct AttackedPeer *tmp_att_peer;
1644 struct AttackedPeer *att_stop_peer;
1646 LOG (GNUNET_ERROR_TYPE_DEBUG, "Going to execute next round maliciously.\n");
1648 /* Do malicious actions */
1650 { /* Try to maximise representation */
1652 /* The maximum of pushes we're going to send this round */
1653 num_pushes = min (min (push_limit,
1654 num_attacked_peers),
1655 GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE);
1658 /* Send PUSHes to attacked peers */
1660 /* If we see this peer again while iterating over peers
1661 * we can stop iterating, as peers will ignore multiple
1662 * pushes from one peer in one round */
1663 if (att_peers_head == att_peer_index)
1664 att_stop_peer = att_peers_tail;
1666 att_peers_tail = att_peer_index->prev;
1668 for (i = 0 ; i < num_pushes ; i++)
1670 if (att_peers_tail == att_peer_index)
1671 att_peer_index = att_peers_head;
1672 else if (att_stop_peer == att_peer_index)
1675 att_peer_index = att_peer_index->next;
1677 send_push (&att_peer_index->peer_id);
1681 /* Send PULLs to some peers to learn about additional peers to attack */
1683 /* If we see this peer again while iterating over peers
1684 * we can stop iterating, as peers will ignore multiple
1685 * pushes from one peer in one round */
1686 tmp_att_peer = att_peer_index;
1687 if (att_peers_head == att_peer_index)
1688 att_stop_peer = att_peers_tail;
1690 att_peers_tail = att_peer_index->prev;
1692 for (i = 0 ; i < num_pushes * alpha ; i++)
1694 if (att_peers_tail == tmp_att_peer)
1695 tmp_att_peer = att_peers_head;
1696 else if (att_stop_peer == att_peer_index)
1699 att_peer_index = tmp_att_peer->next;
1701 send_pull_request (&tmp_att_peer->peer_id);
1706 else if (2 == mal_type)
1708 * Try to partition the network
1709 * Send as many pushes to the attacked peer as possible
1710 * That is one push per round as it will ignore more.
1712 send_push (&attacked_peer);
1716 /* Schedule next round */
1717 time_next_round = compute_rand_delay (round_interval, 2);
1719 //do_round_task = GNUNET_SCHEDULER_add_delayed (round_interval, &do_mal_round, NULL);
1720 do_round_task = GNUNET_SCHEDULER_add_delayed (time_next_round, &do_mal_round, NULL);
1721 LOG (GNUNET_ERROR_TYPE_DEBUG, "Finished round\n");
1723 #endif /* ENABLE_MALICIOUS */
1727 * Send out PUSHes and PULLs, possibly update #gossip_list, samplers.
1729 * This is executed regylary.
1732 do_round (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1734 LOG (GNUNET_ERROR_TYPE_DEBUG, "Going to execute next round.\n");
1737 unsigned int *permut;
1738 unsigned int n_peers; /* Number of peers we send pushes/pulls to */
1739 struct GNUNET_PeerIdentity peer;
1740 struct GNUNET_PeerIdentity *tmp_peer;
1742 LOG (GNUNET_ERROR_TYPE_DEBUG,
1743 "Printing gossip list:\n");
1744 for (i = 0 ; i < gossip_list_size ; i++)
1745 LOG (GNUNET_ERROR_TYPE_DEBUG,
1746 "\t%s\n", GNUNET_i2s (&gossip_list[i]));
1747 // TODO log lists, ...
1749 /* Would it make sense to have one shuffeled gossip list and then
1750 * to send PUSHes to first alpha peers, PULL requests to next beta peers and
1751 * use the rest to update sampler?
1752 * in essence get random peers with consumption */
1755 if (0 < gossip_list_size)
1757 permut = GNUNET_CRYPTO_random_permute (GNUNET_CRYPTO_QUALITY_STRONG,
1758 (unsigned int) gossip_list_size);
1759 n_peers = ceil (alpha * gossip_list_size);
1760 LOG (GNUNET_ERROR_TYPE_DEBUG,
1761 "Going to send pushes to %u ceil (%f * %u) peers.\n",
1762 n_peers, alpha, gossip_list_size);
1763 for (i = 0 ; i < n_peers ; i++)
1765 peer = gossip_list[permut[i]];
1766 if (0 != GNUNET_CRYPTO_cmp_peer_identity (&own_identity, &peer)) // TODO
1767 { // FIXME if this fails schedule/loop this for later
1771 GNUNET_free (permut);
1775 /* Send PULL requests */
1776 //permut = GNUNET_CRYPTO_random_permute (GNUNET_CRYPTO_QUALITY_STRONG, (unsigned int) sampler_list->size);
1777 n_peers = ceil (beta * gossip_list_size);
1778 LOG (GNUNET_ERROR_TYPE_DEBUG,
1779 "Going to send pulls to %u ceil (%f * %u) peers.\n",
1780 n_peers, beta, gossip_list_size);
1781 for (i = 0 ; i < n_peers ; i++)
1783 tmp_peer = get_rand_peer_ignore_list (gossip_list, gossip_list_size,
1784 pending_pull_reply_list, pending_pull_reply_list_size);
1785 if (NULL != tmp_peer)
1788 GNUNET_free (tmp_peer);
1790 if (0 != GNUNET_CRYPTO_cmp_peer_identity (&own_identity, &peer))
1792 send_pull_request (&peer);
1798 /* Update gossip list */
1800 if ( push_list_size <= alpha * gossip_list_size &&
1801 push_list_size != 0 &&
1802 pull_list_size != 0 )
1804 LOG (GNUNET_ERROR_TYPE_DEBUG, "Update of the gossip list.\n");
1806 uint32_t first_border;
1807 uint32_t second_border;
1809 uint32_t peers_to_clean_size;
1810 struct GNUNET_PeerIdentity *peers_to_clean;
1812 peers_to_clean = NULL;
1813 peers_to_clean_size = 0;
1814 GNUNET_array_grow (peers_to_clean, peers_to_clean_size, gossip_list_size);
1815 memcpy (peers_to_clean,
1817 gossip_list_size * sizeof (struct GNUNET_PeerIdentity));
1819 first_border = ceil (alpha * sampler_size_est_need);
1820 second_border = first_border + ceil (beta * sampler_size_est_need);
1822 GNUNET_array_grow (gossip_list, gossip_list_size, second_border);
1824 for (i = 0 ; i < first_border ; i++)
1825 { // TODO use RPS_sampler_get_n_rand_peers
1826 /* Update gossip list with peers received through PUSHes */
1827 r_index = GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_STRONG,
1829 gossip_list[i] = push_list[r_index];
1830 // TODO change the peer_flags accordingly
1833 for (i = first_border ; i < second_border ; i++)
1835 /* Update gossip list with peers received through PULLs */
1836 r_index = GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_STRONG,
1838 gossip_list[i] = pull_list[r_index];
1839 // TODO change the peer_flags accordingly
1842 for (i = second_border ; i < sampler_size_est_need ; i++)
1844 /* Update gossip list with peers from history */
1845 RPS_sampler_get_n_rand_peers (prot_sampler, hist_update, NULL, 1, GNUNET_NO);
1846 num_hist_update_tasks++;
1847 // TODO change the peer_flags accordingly
1850 for (i = 0 ; i < gossip_list_size ; i++)
1851 rem_from_list (&peers_to_clean, &peers_to_clean_size, &gossip_list[i]);
1853 for (i = 0 ; i < peers_to_clean_size ; i++)
1854 peer_clean (&peers_to_clean[i]);
1856 GNUNET_free (peers_to_clean);
1860 LOG (GNUNET_ERROR_TYPE_DEBUG, "No update of the gossip list.\n");
1862 // TODO independent of that also get some peers from CADET_get_peers()?
1865 /* Update samplers */
1866 for ( i = 0 ; i < push_list_size ; i++ )
1868 LOG (GNUNET_ERROR_TYPE_DEBUG,
1869 "Updating with peer %s from push list\n",
1870 GNUNET_i2s (&push_list[i]));
1871 RPS_sampler_update (prot_sampler, &push_list[i]);
1872 RPS_sampler_update (client_sampler, &push_list[i]);
1873 // TODO set in_flag?
1876 for ( i = 0 ; i < pull_list_size ; i++ )
1878 LOG (GNUNET_ERROR_TYPE_DEBUG,
1879 "Updating with peer %s from pull list\n",
1880 GNUNET_i2s (&pull_list[i]));
1881 RPS_sampler_update (prot_sampler, &pull_list[i]);
1882 RPS_sampler_update (client_sampler, &pull_list[i]);
1883 // TODO set in_flag?
1887 /* Empty push/pull lists */
1888 GNUNET_array_grow (push_list, push_list_size, 0);
1889 GNUNET_array_grow (pull_list, pull_list_size, 0);
1891 struct GNUNET_TIME_Relative time_next_round;
1893 time_next_round = compute_rand_delay (round_interval, 2);
1895 /* Schedule next round */
1896 //do_round_task = GNUNET_SCHEDULER_add_delayed (round_interval, &do_round, NULL);
1897 do_round_task = GNUNET_SCHEDULER_add_delayed (time_next_round, &do_round, NULL);
1898 LOG (GNUNET_ERROR_TYPE_DEBUG, "Finished round\n");
1903 rps_start (struct GNUNET_SERVER_Handle *server);
1907 * This is called from GNUNET_CADET_get_peers().
1909 * It is called on every peer(ID) that cadet somehow has contact with.
1910 * We use those to initialise the sampler.
1913 init_peer_cb (void *cls,
1914 const struct GNUNET_PeerIdentity *peer,
1915 int tunnel, // "Do we have a tunnel towards this peer?"
1916 unsigned int n_paths, // "Number of known paths towards this peer"
1917 unsigned int best_path) // "How long is the best path?
1918 // (0 = unknown, 1 = ourselves, 2 = neighbor)"
1920 struct PeerOutstandingOp out_op;
1921 struct PeerContext *peer_ctx;
1924 && 0 != GNUNET_CRYPTO_cmp_peer_identity (&own_identity, peer))
1926 LOG (GNUNET_ERROR_TYPE_DEBUG,
1927 "Got peer %s (at %p) from CADET (gossip_list_size: %u)\n",
1928 GNUNET_i2s (peer), peer, gossip_list_size);
1930 // maybe create a function for that
1931 peer_ctx = get_peer_ctx (peer_map, peer);
1932 if (GNUNET_YES != get_peer_flag (peer_ctx, VALID))
1934 if (GNUNET_NO == insert_in_sampler_scheduled (peer_ctx))
1936 out_op.op = insert_in_sampler;
1937 out_op.op_cls = NULL;
1938 GNUNET_array_append (peer_ctx->outstanding_ops,
1939 peer_ctx->num_outstanding_ops,
1943 if (GNUNET_NO == insert_in_gossip_list_scheduled (peer_ctx))
1945 out_op.op = insert_in_gossip_list;
1946 out_op.op_cls = NULL;
1947 GNUNET_array_append (peer_ctx->outstanding_ops,
1948 peer_ctx->num_outstanding_ops,
1952 /* Trigger livelyness test on peer */
1953 check_peer_live (peer_ctx);
1956 // send push/pull to each of those peers?
1962 * Clean the send channel of a peer
1965 peer_clean (const struct GNUNET_PeerIdentity *peer)
1967 struct PeerContext *peer_ctx;
1968 struct GNUNET_CADET_Channel *channel;
1970 if (GNUNET_YES != in_arr (gossip_list, gossip_list_size, peer)
1971 && GNUNET_YES == GNUNET_CONTAINER_multipeermap_contains (peer_map, peer))
1973 peer_ctx = get_peer_ctx (peer_map, peer);
1974 if (NULL != peer_ctx->send_channel)
1976 channel = peer_ctx->send_channel;
1977 peer_ctx->send_channel = NULL;
1978 GNUNET_CADET_channel_destroy (channel);
1985 * Callback used to remove peers from the multipeermap.
1988 peer_remove_cb (void *cls, const struct GNUNET_PeerIdentity *key, void *value)
1990 struct PeerContext *peer_ctx;
1991 const struct GNUNET_CADET_Channel *channel =
1992 (const struct GNUNET_CADET_Channel *) cls;
1993 struct GNUNET_CADET_Channel *recv;
1994 struct GNUNET_CADET_Channel *send;
1996 if (GNUNET_YES == GNUNET_CONTAINER_multipeermap_contains (peer_map, value))
1998 peer_ctx = (struct PeerContext *) value;
2000 if (0 != peer_ctx->num_outstanding_ops)
2001 GNUNET_array_grow (peer_ctx->outstanding_ops,
2002 peer_ctx->num_outstanding_ops,
2005 if (NULL != peer_ctx->mq)
2007 GNUNET_MQ_destroy (peer_ctx->mq);
2008 peer_ctx->mq = NULL;
2012 if (NULL != peer_ctx->is_live_task)
2014 LOG (GNUNET_ERROR_TYPE_DEBUG,
2015 "Trying to cancle is_live_task for peer %s\n",
2017 GNUNET_CADET_notify_transmit_ready_cancel (peer_ctx->is_live_task);
2018 peer_ctx->is_live_task = NULL;
2021 send = peer_ctx->send_channel;
2022 peer_ctx->send_channel = NULL;
2026 GNUNET_CADET_channel_destroy (send);
2029 recv = peer_ctx->send_channel;
2030 peer_ctx->recv_channel = NULL;
2034 GNUNET_CADET_channel_destroy (recv);
2037 if (GNUNET_YES != GNUNET_CONTAINER_multipeermap_remove_all (peer_map, key))
2038 LOG (GNUNET_ERROR_TYPE_WARNING, "removing peer from peer_map failed\n");
2040 GNUNET_free (peer_ctx);
2048 * Task run during shutdown.
2054 shutdown_task (void *cls,
2055 const struct GNUNET_SCHEDULER_TaskContext *tc)
2057 LOG (GNUNET_ERROR_TYPE_DEBUG, "RPS is going down\n");
2059 if (NULL != do_round_task)
2061 GNUNET_SCHEDULER_cancel (do_round_task);
2062 do_round_task = NULL;
2067 if (GNUNET_SYSERR ==
2068 GNUNET_CONTAINER_multipeermap_iterate (peer_map, peer_remove_cb, NULL))
2069 LOG (GNUNET_ERROR_TYPE_WARNING,
2070 "Iterating over peers to disconnect from them was cancelled\n");
2073 GNUNET_NSE_disconnect (nse);
2074 GNUNET_CADET_disconnect (cadet_handle);
2075 RPS_sampler_destroy (prot_sampler);
2076 RPS_sampler_destroy (client_sampler);
2077 LOG (GNUNET_ERROR_TYPE_DEBUG,
2078 "Size of the peermap: %u\n",
2079 GNUNET_CONTAINER_multipeermap_size (peer_map));
2080 GNUNET_break (0 == GNUNET_CONTAINER_multipeermap_size (peer_map));
2081 GNUNET_CONTAINER_multipeermap_destroy (peer_map);
2082 GNUNET_array_grow (gossip_list, gossip_list_size, 0);
2083 GNUNET_array_grow (push_list, push_list_size, 0);
2084 GNUNET_array_grow (pull_list, pull_list_size, 0);
2085 #ifdef ENABLE_MALICIOUS
2086 GNUNET_array_grow (mal_peers, num_mal_peers, 0);
2087 // TODO empty attacked_peers DLL
2088 #endif /* ENABLE_MALICIOUS */
2093 * A client disconnected. Remove all of its data structure entries.
2095 * @param cls closure, NULL
2096 * @param client identification of the client
2099 handle_client_disconnect (void *cls,
2100 struct GNUNET_SERVER_Client * client)
2106 * Handle the channel a peer opens to us.
2108 * @param cls The closure
2109 * @param channel The channel the peer wants to establish
2110 * @param initiator The peer's peer ID
2111 * @param port The port the channel is being established over
2112 * @param options Further options
2115 handle_inbound_channel (void *cls,
2116 struct GNUNET_CADET_Channel *channel,
2117 const struct GNUNET_PeerIdentity *initiator,
2119 enum GNUNET_CADET_ChannelOption options)
2121 struct PeerContext *peer_ctx;
2122 struct GNUNET_PeerIdentity peer;
2125 LOG (GNUNET_ERROR_TYPE_DEBUG,
2126 "New channel was established to us (Peer %s).\n",
2127 GNUNET_i2s (&peer));
2129 GNUNET_assert (NULL != channel);
2131 // we might not even store the recv_channel
2133 peer_ctx = get_peer_ctx (peer_map, &peer);
2134 // FIXME what do we do if a channel is established twice?
2135 // overwrite? Clean old channel? ...?
2136 //if (NULL != peer_ctx->recv_channel)
2138 // peer_ctx->recv_channel = channel;
2140 peer_ctx->recv_channel = channel;
2142 (void) GNUNET_CONTAINER_multipeermap_put (peer_map, &peer, peer_ctx,
2143 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
2145 peer_is_live (peer_ctx);
2147 return NULL; // TODO
2152 * This is called when a remote peer destroys a channel.
2154 * @param cls The closure
2155 * @param channel The channel being closed
2156 * @param channel_ctx The context associated with this channel
2159 cleanup_channel (void *cls,
2160 const struct GNUNET_CADET_Channel *channel,
2163 struct GNUNET_PeerIdentity *peer;
2164 struct PeerContext *peer_ctx;
2166 peer = (struct GNUNET_PeerIdentity *) GNUNET_CADET_channel_get_info (
2167 (struct GNUNET_CADET_Channel *) channel, GNUNET_CADET_OPTION_PEER);
2168 // Guess simply casting isn't the nicest way...
2169 // FIXME wait for cadet to change this function
2171 if (GNUNET_YES == GNUNET_CONTAINER_multipeermap_contains (peer_map, peer))
2173 peer_ctx = GNUNET_CONTAINER_multipeermap_get (peer_map, peer);
2175 if (NULL == peer_ctx) /* It could have been removed by shutdown_task */
2178 if (channel == peer_ctx->send_channel)
2179 { /* Peer probably went down */
2180 LOG (GNUNET_ERROR_TYPE_DEBUG,
2181 "Peer %s destroyed send channel - probably went down, cleaning up\n",
2183 rem_from_list (&gossip_list, &gossip_list_size, peer);
2184 rem_from_list (&pending_pull_reply_list, &pending_pull_reply_list_size, peer);
2186 peer_ctx->send_channel = NULL;
2187 /* Somwewhat {ab,re}use the iterator function */
2188 /* Cast to void is ok, because it's used as void in peer_remove_cb */
2189 (void) peer_remove_cb ((void *) channel, peer, peer_ctx);
2191 else if (channel == peer_ctx->recv_channel)
2192 { /* Other peer doesn't want to send us messages anymore */
2193 LOG (GNUNET_ERROR_TYPE_DEBUG,
2194 "Peer %s destroyed recv channel - cleaning up channel\n",
2196 peer_ctx->recv_channel = NULL;
2203 * Actually start the service.
2206 rps_start (struct GNUNET_SERVER_Handle *server)
2208 static const struct GNUNET_SERVER_MessageHandler handlers[] = {
2209 {&handle_client_request, NULL, GNUNET_MESSAGE_TYPE_RPS_CS_REQUEST,
2210 sizeof (struct GNUNET_RPS_CS_RequestMessage)},
2211 {&handle_client_seed, NULL, GNUNET_MESSAGE_TYPE_RPS_CS_SEED, 0},
2212 #ifdef ENABLE_MALICIOUS
2213 {&handle_client_act_malicious, NULL, GNUNET_MESSAGE_TYPE_RPS_ACT_MALICIOUS , 0},
2214 #endif /* ENABLE_MALICIOUS */
2218 GNUNET_SERVER_add_handlers (server, handlers);
2219 GNUNET_SERVER_disconnect_notify (server,
2220 &handle_client_disconnect,
2222 LOG (GNUNET_ERROR_TYPE_DEBUG, "Ready to receive requests from clients\n");
2225 do_round_task = GNUNET_SCHEDULER_add_now (&do_round, NULL);
2226 LOG (GNUNET_ERROR_TYPE_DEBUG, "Scheduled first round\n");
2228 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
2235 * Process statistics requests.
2237 * @param cls closure
2238 * @param server the initialized server
2239 * @param c configuration to use
2243 struct GNUNET_SERVER_Handle *server,
2244 const struct GNUNET_CONFIGURATION_Handle *c)
2246 // TODO check what this does -- copied from gnunet-boss
2247 // - seems to work as expected
2248 GNUNET_log_setup ("rps", GNUNET_error_type_to_string (GNUNET_ERROR_TYPE_DEBUG), NULL);
2253 GNUNET_CRYPTO_get_peer_identity (cfg, &own_identity); // TODO check return value
2254 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2255 "STARTING SERVICE (rps) for peer [%s]\n",
2256 GNUNET_i2s (&own_identity));
2257 #ifdef ENABLE_MALICIOUS
2258 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2259 "Malicious execution compiled in.\n");
2260 #endif /* ENABLE_MALICIOUS */
2264 /* Get time interval from the configuration */
2265 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_time (cfg, "RPS",
2269 LOG (GNUNET_ERROR_TYPE_DEBUG, "Failed to read ROUNDINTERVAL from config\n");
2270 GNUNET_SCHEDULER_shutdown ();
2274 /* Get initial size of sampler/gossip list from the configuration */
2275 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_number (cfg, "RPS",
2277 (long long unsigned int *) &sampler_size_est_need))
2279 LOG (GNUNET_ERROR_TYPE_DEBUG, "Failed to read INITSIZE from config\n");
2280 GNUNET_SCHEDULER_shutdown ();
2283 LOG (GNUNET_ERROR_TYPE_DEBUG, "INITSIZE is %" PRIu64 "\n", sampler_size_est_need);
2289 /* connect to NSE */
2290 nse = GNUNET_NSE_connect (cfg, nse_callback, NULL);
2291 // TODO check whether that was successful
2292 LOG (GNUNET_ERROR_TYPE_DEBUG, "Connected to NSE\n");
2298 peer_map = GNUNET_CONTAINER_multipeermap_create (sampler_size_est_need, GNUNET_NO);
2301 /* Initialise cadet */
2302 static const struct GNUNET_CADET_MessageHandler cadet_handlers[] = {
2303 {&handle_peer_push , GNUNET_MESSAGE_TYPE_RPS_PP_PUSH ,
2304 sizeof (struct GNUNET_MessageHeader)},
2305 {&handle_peer_pull_request, GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REQUEST,
2306 sizeof (struct GNUNET_MessageHeader)},
2307 {&handle_peer_pull_reply , GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REPLY , 0},
2311 const uint32_t ports[] = {GNUNET_RPS_CADET_PORT, 0}; // _PORT specified in src/rps/rps.h
2312 cadet_handle = GNUNET_CADET_connect (cfg,
2314 &handle_inbound_channel,
2318 LOG (GNUNET_ERROR_TYPE_DEBUG, "Connected to CADET\n");
2321 /* Initialise sampler */
2322 struct GNUNET_TIME_Relative half_round_interval;
2323 struct GNUNET_TIME_Relative max_round_interval;
2325 half_round_interval = GNUNET_TIME_relative_multiply (round_interval, .5);
2326 max_round_interval = GNUNET_TIME_relative_add (round_interval, half_round_interval);
2328 prot_sampler = RPS_sampler_init (sampler_size_est_need, max_round_interval);
2329 client_sampler = RPS_sampler_init (sampler_size_est_need, max_round_interval);
2331 /* Initialise push and pull maps */
2336 pending_pull_reply_list = NULL;
2337 pending_pull_reply_list_size = 0;
2340 num_hist_update_tasks = 0;
2343 LOG (GNUNET_ERROR_TYPE_DEBUG, "Requesting peers from CADET\n");
2344 GNUNET_CADET_get_peers (cadet_handle, &init_peer_cb, NULL);
2345 // TODO send push/pull to each of those peers?
2353 * The main function for the rps service.
2355 * @param argc number of arguments from the command line
2356 * @param argv command line arguments
2357 * @return 0 ok, 1 on error
2360 main (int argc, char *const *argv)
2362 return (GNUNET_OK ==
2363 GNUNET_SERVICE_run (argc,
2366 GNUNET_SERVICE_OPTION_NONE,
2367 &run, NULL)) ? 0 : 1;
2370 /* end of gnunet-service-rps.c */