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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;
375 * Number of other malicious peers
377 static uint32_t num_mal_peers;
380 * If type is 2 this is the attacked peer
382 static struct GNUNET_PeerIdentity attacked_peer;
383 #endif /* ENABLE_MALICIOUS */
386 /***********************************************************************
388 ***********************************************************************/
395 /***********************************************************************
397 ***********************************************************************/
400 * Set a peer flag of given peer context.
402 #define set_peer_flag(peer_ctx, mask) (peer_ctx->peer_flags |= mask)
405 * Get peer flag of given peer context.
407 #define get_peer_flag(peer_ctx, mask) (peer_ctx->peer_flags & mask ? GNUNET_YES : GNUNET_NO)
410 * Unset flag of given peer context.
412 #define unset_peer_flag(peer_ctx, mask) (peer_ctx->peer_flags &= (~mask))
416 * Clean the send channel of a peer
419 peer_clean (const struct GNUNET_PeerIdentity *peer);
423 * Check if peer is already in peer array.
426 in_arr (const struct GNUNET_PeerIdentity *array,
427 unsigned int arr_size,
428 const struct GNUNET_PeerIdentity *peer)
430 GNUNET_assert (NULL != peer);
435 GNUNET_assert (NULL != array);
439 for (i = 0; i < arr_size ; i++)
440 if (0 == GNUNET_CRYPTO_cmp_peer_identity (&array[i], peer))
447 * Print peerlist to log.
450 print_peer_list (struct GNUNET_PeerIdentity *list, unsigned int len)
454 LOG (GNUNET_ERROR_TYPE_DEBUG,
455 "Printing peer list of length %u at %p:\n",
458 for (i = 0 ; i < len ; i++)
460 LOG (GNUNET_ERROR_TYPE_DEBUG,
462 i, GNUNET_i2s (&list[i]));
468 * Remove peer from list.
471 rem_from_list (struct GNUNET_PeerIdentity **peer_list,
472 unsigned int *list_size,
473 const struct GNUNET_PeerIdentity *peer)
476 struct GNUNET_PeerIdentity *tmp;
480 LOG (GNUNET_ERROR_TYPE_DEBUG,
481 "Removing peer %s from list at %p\n",
485 for ( i = 0 ; i < *list_size ; i++ )
487 if (0 == GNUNET_CRYPTO_cmp_peer_identity (&tmp[i], peer))
489 if (i < *list_size -1)
490 { /* Not at the last entry -- shift peers left */
491 memcpy (&tmp[i], &tmp[i +1],
492 ((*list_size) - i -1) * sizeof (struct GNUNET_PeerIdentity));
494 /* Remove last entry (should be now useless PeerID) */
495 GNUNET_array_grow (tmp, *list_size, (*list_size) -1);
502 * Get random peer from the given list but don't return one from the @a ignore_list.
504 struct GNUNET_PeerIdentity *
505 get_rand_peer_ignore_list (const struct GNUNET_PeerIdentity *peer_list,
507 const struct GNUNET_PeerIdentity *ignore_list,
508 uint32_t ignore_size)
512 struct GNUNET_PeerIdentity *tmp_peer_list;
513 struct GNUNET_PeerIdentity *peer;
515 GNUNET_assert (NULL != peer_list);
520 tmp_peer_list = NULL;
521 GNUNET_array_grow (tmp_peer_list, tmp_size, list_size);
522 memcpy (tmp_peer_list,
524 list_size * sizeof (struct GNUNET_PeerIdentity));
525 peer = GNUNET_new (struct GNUNET_PeerIdentity);
528 * Choose the r_index of the peer we want to return
529 * at random from the interval of the gossip list
531 r_index = GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_STRONG,
533 *peer = tmp_peer_list[r_index];
535 while (in_arr (ignore_list, ignore_size, peer))
537 rem_from_list (&tmp_peer_list, &tmp_size, peer);
539 print_peer_list (tmp_peer_list, tmp_size);
548 * Choose the r_index of the peer we want to return
549 * at random from the interval of the gossip list
551 r_index = GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_STRONG,
553 *peer = tmp_peer_list[r_index];
557 GNUNET_array_grow (tmp_peer_list, tmp_size, 0);
564 * Get the context of a peer. If not existing, create.
567 get_peer_ctx (struct GNUNET_CONTAINER_MultiPeerMap *peer_map,
568 const struct GNUNET_PeerIdentity *peer)
570 struct PeerContext *ctx;
572 if ( GNUNET_YES == GNUNET_CONTAINER_multipeermap_contains (peer_map, peer))
574 ctx = GNUNET_CONTAINER_multipeermap_get (peer_map, peer);
578 ctx = GNUNET_new (struct PeerContext);
581 ctx->send_channel = NULL;
582 ctx->recv_channel = NULL;
583 ctx->outstanding_ops = NULL;
584 ctx->num_outstanding_ops = 0;
585 ctx->is_live_task = NULL;
586 ctx->peer_id = *peer;
587 (void) GNUNET_CONTAINER_multipeermap_put (peer_map, peer, ctx,
588 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
595 * Put random peer from sampler into the gossip list as history update.
598 hist_update (void *cls, struct GNUNET_PeerIdentity *ids, uint32_t num_peers)
600 GNUNET_assert (1 == num_peers);
602 if (gossip_list_size < sampler_size_est_need)
603 GNUNET_array_append (gossip_list, gossip_list_size, *ids);
605 if (0 < num_hist_update_tasks)
606 num_hist_update_tasks--;
611 * Set the peer flag to living and call the outstanding operations on this peer.
614 peer_is_live (struct PeerContext *peer_ctx)
616 struct GNUNET_PeerIdentity *peer;
618 /* Cancle is_live_task if still scheduled */
619 if (NULL != peer_ctx->is_live_task)
621 GNUNET_CADET_notify_transmit_ready_cancel (peer_ctx->is_live_task);
622 peer_ctx->is_live_task = NULL;
625 peer = &peer_ctx->peer_id;
626 set_peer_flag (peer_ctx, VALID);
628 LOG (GNUNET_ERROR_TYPE_DEBUG, "Peer %s is live\n", GNUNET_i2s (peer));
630 if (0 != peer_ctx->num_outstanding_ops)
631 { /* Call outstanding operations */
634 for (i = 0 ; i < peer_ctx->num_outstanding_ops ; i++)
635 peer_ctx->outstanding_ops[i].op (peer_ctx->outstanding_ops[i].op_cls, peer);
636 GNUNET_array_grow (peer_ctx->outstanding_ops, peer_ctx->num_outstanding_ops, 0);
644 * Callback that is called when a channel was effectively established.
645 * This is given to ntfy_tmt_rdy and called when the channel was
646 * successfully established.
649 cadet_ntfy_tmt_rdy_cb (void *cls, size_t size, void *buf)
651 struct PeerContext *peer_ctx = (struct PeerContext *) cls;
656 peer_ctx->is_live_task = NULL;
657 peer_is_live (peer_ctx);
660 //if (NULL != peer_ctx->is_live_task)
662 // LOG (GNUNET_ERROR_TYPE_DEBUG,
663 // "Trying to cancle is_live_task for peer %s\n",
664 // GNUNET_i2s (&peer_ctx->peer_id));
665 // GNUNET_CADET_notify_transmit_ready_cancel (peer_ctx->is_live_task);
666 // peer_ctx->is_live_task = NULL;
674 * Get the channel of a peer. If not existing, create.
676 struct GNUNET_CADET_Channel *
677 get_channel (struct GNUNET_CONTAINER_MultiPeerMap *peer_map,
678 const struct GNUNET_PeerIdentity *peer)
680 struct PeerContext *peer_ctx;
682 peer_ctx = get_peer_ctx (peer_map, peer);
683 if (NULL == peer_ctx->send_channel)
685 LOG (GNUNET_ERROR_TYPE_DEBUG,
686 "Trying to establish channel to peer %s\n",
689 peer_ctx->send_channel =
690 GNUNET_CADET_channel_create (cadet_handle,
693 GNUNET_RPS_CADET_PORT,
694 GNUNET_CADET_OPTION_RELIABLE);
696 // do I have to explicitly put it in the peer_map?
697 (void) GNUNET_CONTAINER_multipeermap_put
701 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
703 return peer_ctx->send_channel;
708 * Get the message queue of a specific peer.
710 * If we already have a message queue open to this client,
711 * simply return it, otherways create one.
713 struct GNUNET_MQ_Handle *
714 get_mq (struct GNUNET_CONTAINER_MultiPeerMap *peer_map,
715 const struct GNUNET_PeerIdentity *peer_id)
717 struct PeerContext *peer_ctx;
719 peer_ctx = get_peer_ctx (peer_map, peer_id);
721 if (NULL == peer_ctx->mq)
723 (void) get_channel (peer_map, peer_id);
724 peer_ctx->mq = GNUNET_CADET_mq_create (peer_ctx->send_channel);
725 //do I have to explicitly put it in the peer_map?
726 (void) GNUNET_CONTAINER_multipeermap_put (peer_map, peer_id, peer_ctx,
727 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
734 * Issue check whether peer is live
736 * @param peer_ctx the context of the peer
739 check_peer_live (struct PeerContext *peer_ctx)
741 (void) get_channel (peer_map, &peer_ctx->peer_id);
742 LOG (GNUNET_ERROR_TYPE_DEBUG,
743 "Get informed about peer %s getting live\n",
744 GNUNET_i2s (&peer_ctx->peer_id));
745 peer_ctx->is_live_task =
746 GNUNET_CADET_notify_transmit_ready (peer_ctx->send_channel,
748 GNUNET_TIME_UNIT_FOREVER_REL,
749 sizeof (struct GNUNET_MessageHeader),
750 cadet_ntfy_tmt_rdy_cb,
752 // FIXME check whether this is NULL
757 * Sum all time relatives of an array.
759 struct GNUNET_TIME_Relative
760 T_relative_sum (const struct GNUNET_TIME_Relative *rel_array, uint32_t arr_size)
762 struct GNUNET_TIME_Relative sum;
765 sum = GNUNET_TIME_UNIT_ZERO;
766 for ( i = 0 ; i < arr_size ; i++ )
768 sum = GNUNET_TIME_relative_add (sum, rel_array[i]);
775 * Compute the average of given time relatives.
777 struct GNUNET_TIME_Relative
778 T_relative_avg (const struct GNUNET_TIME_Relative *rel_array, uint32_t arr_size)
780 return GNUNET_TIME_relative_divide (T_relative_sum (rel_array, arr_size), arr_size);
785 * Insert PeerID in #pull_list
787 * Called once we know a peer is live.
790 insert_in_pull_list (void *cls, const struct GNUNET_PeerIdentity *peer)
792 if (GNUNET_NO == in_arr (pull_list, pull_list_size, peer))
793 GNUNET_array_append (pull_list, pull_list_size, *peer);
799 * Check whether #insert_in_pull_list was already scheduled
802 insert_in_pull_list_scheduled (const struct PeerContext *peer_ctx)
806 for ( i = 0 ; i < peer_ctx->num_outstanding_ops ; i++ )
807 if (insert_in_pull_list == peer_ctx->outstanding_ops[i].op)
814 * Insert PeerID in #gossip_list
816 * Called once we know a peer is live.
819 insert_in_gossip_list (void *cls, const struct GNUNET_PeerIdentity *peer)
821 if (GNUNET_NO == in_arr (gossip_list, gossip_list_size, peer))
822 GNUNET_array_append (gossip_list, gossip_list_size, *peer);
824 (void) get_channel (peer_map, peer);
828 * Check whether #insert_in_gossip_list was already scheduled
831 insert_in_gossip_list_scheduled (const struct PeerContext *peer_ctx)
835 for ( i = 0 ; i < peer_ctx->num_outstanding_ops ; i++ )
836 if (insert_in_gossip_list == peer_ctx->outstanding_ops[i].op)
843 * Update sampler with given PeerID.
846 insert_in_sampler (void *cls, const struct GNUNET_PeerIdentity *peer)
848 LOG (GNUNET_ERROR_TYPE_DEBUG,
849 "Updating samplers with peer %s from insert_in_sampler()\n",
851 RPS_sampler_update (prot_sampler, peer);
852 RPS_sampler_update (client_sampler, peer);
857 * Check whether #insert_in_sampler was already scheduled
860 insert_in_sampler_scheduled (const struct PeerContext *peer_ctx)
864 for ( i = 0 ; i < peer_ctx->num_outstanding_ops ; i++ )
865 if (insert_in_sampler== peer_ctx->outstanding_ops[i].op)
872 * Wrapper around #RPS_sampler_resize()
874 * If we do not have enough sampler elements, double current sampler size
875 * If we have more than enough sampler elements, halv current sampler size
878 resize_wrapper (struct RPS_Sampler *sampler, uint32_t new_size)
880 unsigned int sampler_size;
883 // TODO respect the min, max
884 sampler_size = RPS_sampler_get_size (sampler);
885 if (sampler_size > new_size * 4)
887 RPS_sampler_resize (sampler, sampler_size / 2);
889 else if (sampler_size < new_size)
891 RPS_sampler_resize (sampler, sampler_size * 2);
893 LOG (GNUNET_ERROR_TYPE_DEBUG, "sampler_size is now %u\n", sampler_size);
898 * Wrapper around #RPS_sampler_resize() resizing the client sampler
901 client_resize_wrapper ()
903 uint32_t bigger_size;
904 unsigned int sampler_size;
908 sampler_size = RPS_sampler_get_size (client_sampler);
910 if (sampler_size_est_need > sampler_size_client_need)
911 bigger_size = sampler_size_est_need;
913 bigger_size = sampler_size_client_need;
915 // TODO respect the min, max
916 resize_wrapper (client_sampler, bigger_size);
917 LOG (GNUNET_ERROR_TYPE_DEBUG, "sampler_size is now %u\n", sampler_size);
922 * Estimate request rate
924 * Called every time we receive a request from the client.
929 struct GNUNET_TIME_Relative max_round_duration;
931 if (request_deltas_size > req_counter)
933 if ( 1 < req_counter)
935 /* Shift last request deltas to the right */
936 memcpy (&request_deltas[1],
938 (req_counter - 1) * sizeof (struct GNUNET_TIME_Relative));
940 /* Add current delta to beginning */
942 GNUNET_TIME_absolute_get_difference (last_request,
943 GNUNET_TIME_absolute_get ());
944 request_rate = T_relative_avg (request_deltas, req_counter);
946 /* Compute the duration a round will maximally take */
948 GNUNET_TIME_relative_add (round_interval,
949 GNUNET_TIME_relative_divide (round_interval, 2));
951 /* Set the estimated size the sampler has to have to
952 * satisfy the current client request rate */
953 sampler_size_client_need =
954 max_round_duration.rel_value_us / request_rate.rel_value_us;
956 /* Resize the sampler */
957 client_resize_wrapper ();
959 last_request = GNUNET_TIME_absolute_get ();
963 /***********************************************************************
965 ***********************************************************************/
972 * Function called by NSE.
974 * Updates sizes of sampler list and gossip list and adapt those lists
978 nse_callback (void *cls, struct GNUNET_TIME_Absolute timestamp,
979 double logestimate, double std_dev)
982 //double scale; // TODO this might go gloabal/config
984 LOG (GNUNET_ERROR_TYPE_DEBUG,
985 "Received a ns estimate - logest: %f, std_dev: %f (old_size: %u)\n",
986 logestimate, std_dev, RPS_sampler_get_size (prot_sampler));
988 estimate = GNUNET_NSE_log_estimate_to_n (logestimate);
989 // GNUNET_NSE_log_estimate_to_n (logestimate);
990 estimate = pow (estimate, 1.0 / 3);
991 // TODO add if std_dev is a number
992 // estimate += (std_dev * scale);
993 if (2 < ceil (estimate))
995 LOG (GNUNET_ERROR_TYPE_DEBUG, "Changing estimate to %f\n", estimate);
996 sampler_size_est_need = estimate;
998 LOG (GNUNET_ERROR_TYPE_DEBUG, "Not using estimate %f\n", estimate);
1000 /* If the NSE has changed adapt the lists accordingly */
1001 resize_wrapper (prot_sampler, sampler_size_est_need);
1002 client_resize_wrapper ();
1007 * Callback called once the requested PeerIDs are ready.
1009 * Sends those to the requesting client.
1011 void client_respond (void *cls,
1012 struct GNUNET_PeerIdentity *ids, uint32_t num_peers)
1014 LOG (GNUNET_ERROR_TYPE_DEBUG, "sampler returned %" PRIX32 " peers\n", num_peers);
1015 struct GNUNET_MQ_Envelope *ev;
1016 struct GNUNET_RPS_CS_ReplyMessage *out_msg;
1017 struct GNUNET_SERVER_Client *client;
1018 uint32_t size_needed;
1019 struct client_ctx *cli_ctx;
1021 client = (struct GNUNET_SERVER_Client *) cls;
1023 size_needed = sizeof (struct GNUNET_RPS_CS_ReplyMessage) +
1024 num_peers * sizeof (struct GNUNET_PeerIdentity);
1026 GNUNET_assert (GNUNET_SERVER_MAX_MESSAGE_SIZE >= size_needed);
1028 ev = GNUNET_MQ_msg_extra (out_msg,
1029 num_peers * sizeof (struct GNUNET_PeerIdentity),
1030 GNUNET_MESSAGE_TYPE_RPS_CS_REPLY);
1031 out_msg->num_peers = htonl (num_peers);
1033 memcpy (&out_msg[1],
1035 num_peers * sizeof (struct GNUNET_PeerIdentity));
1038 cli_ctx = GNUNET_SERVER_client_get_user_context (client, struct client_ctx);
1039 if (NULL == cli_ctx) {
1040 cli_ctx = GNUNET_new (struct client_ctx);
1041 cli_ctx->mq = GNUNET_MQ_queue_for_server_client (client);
1042 GNUNET_SERVER_client_set_user_context (client, cli_ctx);
1045 GNUNET_MQ_send (cli_ctx->mq, ev);
1050 * Handle RPS request from the client.
1052 * @param cls closure
1053 * @param client identification of the client
1054 * @param message the actual message
1057 handle_client_request (void *cls,
1058 struct GNUNET_SERVER_Client *client,
1059 const struct GNUNET_MessageHeader *message)
1061 struct GNUNET_RPS_CS_RequestMessage *msg;
1063 uint32_t size_needed;
1066 msg = (struct GNUNET_RPS_CS_RequestMessage *) message;
1068 num_peers = ntohl (msg->num_peers);
1069 size_needed = sizeof (struct GNUNET_RPS_CS_RequestMessage) +
1070 num_peers * sizeof (struct GNUNET_PeerIdentity);
1072 if (GNUNET_SERVER_MAX_MESSAGE_SIZE < size_needed)
1074 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
1078 for (i = 0 ; i < num_peers ; i++)
1081 LOG (GNUNET_ERROR_TYPE_DEBUG, "Client requested %" PRIX32 " random peer(s).\n", num_peers);
1083 RPS_sampler_get_n_rand_peers (client_sampler, client_respond,
1084 client, num_peers, GNUNET_YES);
1086 GNUNET_SERVER_receive_done (client,
1092 * Handle seed from the client.
1094 * @param cls closure
1095 * @param client identification of the client
1096 * @param message the actual message
1099 handle_client_seed (void *cls,
1100 struct GNUNET_SERVER_Client *client,
1101 const struct GNUNET_MessageHeader *message)
1103 struct GNUNET_RPS_CS_SeedMessage *in_msg;
1104 struct GNUNET_PeerIdentity *peers;
1108 if (sizeof (struct GNUNET_RPS_CS_SeedMessage) > ntohs (message->size))
1110 GNUNET_break_op (0);
1111 GNUNET_SERVER_receive_done (client,
1115 in_msg = (struct GNUNET_RPS_CS_SeedMessage *) message;
1116 num_peers = ntohl (in_msg->num_peers);
1117 peers = (struct GNUNET_PeerIdentity *) &in_msg[1];
1118 //peers = GNUNET_new_array (num_peers, struct GNUNET_PeerIdentity);
1119 //memcpy (peers, &in_msg[1], num_peers * sizeof (struct GNUNET_PeerIdentity));
1121 if ((ntohs (message->size) - sizeof (struct GNUNET_RPS_CS_SeedMessage)) /
1122 sizeof (struct GNUNET_PeerIdentity) != num_peers)
1124 GNUNET_break_op (0);
1125 GNUNET_SERVER_receive_done (client,
1129 LOG (GNUNET_ERROR_TYPE_DEBUG,
1130 "Client seeded peers:\n");
1131 print_peer_list (peers, num_peers);
1133 // TODO check for validity of ids
1135 for (i = 0 ; i < num_peers ; i++)
1137 LOG (GNUNET_ERROR_TYPE_DEBUG,
1138 "Updating samplers with seed %" PRIX32 ": %s\n",
1140 GNUNET_i2s (&peers[i]));
1142 RPS_sampler_update (prot_sampler, &peers[i]);
1143 RPS_sampler_update (client_sampler, &peers[i]);
1146 //GNUNET_free (peers);
1148 GNUNET_SERVER_receive_done (client,
1154 * Handle a PUSH message from another peer.
1156 * Check the proof of work and store the PeerID
1157 * in the temporary list for pushed PeerIDs.
1159 * @param cls Closure
1160 * @param channel The channel the PUSH was received over
1161 * @param channel_ctx The context associated with this channel
1162 * @param msg The message header
1165 handle_peer_push (void *cls,
1166 struct GNUNET_CADET_Channel *channel,
1168 const struct GNUNET_MessageHeader *msg)
1170 const struct GNUNET_PeerIdentity *peer;
1172 // (check the proof of work)
1174 peer = (const struct GNUNET_PeerIdentity *) GNUNET_CADET_channel_get_info (channel, GNUNET_CADET_OPTION_PEER);
1175 // FIXME wait for cadet to change this function
1176 LOG (GNUNET_ERROR_TYPE_DEBUG, "PUSH received (%s)\n", GNUNET_i2s (peer));
1178 /* Add the sending peer to the push_list */
1179 if (GNUNET_NO == in_arr (push_list, push_list_size, peer))
1180 GNUNET_array_append (push_list, push_list_size, *peer);
1186 * Handle PULL REQUEST request message from another peer.
1188 * Reply with the gossip list of PeerIDs.
1190 * @param cls Closure
1191 * @param channel The channel the PUSH was received over
1192 * @param channel_ctx The context associated with this channel
1193 * @param msg The message header
1196 handle_peer_pull_request (void *cls,
1197 struct GNUNET_CADET_Channel *channel,
1199 const struct GNUNET_MessageHeader *msg)
1201 struct GNUNET_PeerIdentity *peer;
1203 struct GNUNET_MQ_Handle *mq;
1204 struct GNUNET_MQ_Envelope *ev;
1205 struct GNUNET_RPS_P2P_PullReplyMessage *out_msg;
1208 peer = (struct GNUNET_PeerIdentity *)
1209 GNUNET_CADET_channel_get_info (channel,
1210 GNUNET_CADET_OPTION_PEER);
1211 // FIXME wait for cadet to change this function
1213 /* Compute actual size */
1214 send_size = sizeof (struct GNUNET_RPS_P2P_PullReplyMessage) +
1215 gossip_list_size * sizeof (struct GNUNET_PeerIdentity);
1217 if (GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE < send_size)
1218 /* Compute number of peers to send
1219 * If too long, simply truncate */
1220 // TODO select random ones via permutation
1222 (GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE -
1223 sizeof (struct GNUNET_RPS_P2P_PullReplyMessage)) /
1224 sizeof (struct GNUNET_PeerIdentity);
1226 send_size = gossip_list_size;
1228 LOG (GNUNET_ERROR_TYPE_DEBUG,
1229 "PULL REQUEST from peer %s received, going to send %u peers\n",
1230 GNUNET_i2s (peer), send_size);
1232 mq = get_mq (peer_map, peer);
1234 ev = GNUNET_MQ_msg_extra (out_msg,
1235 send_size * sizeof (struct GNUNET_PeerIdentity),
1236 GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REPLY);
1237 //out_msg->num_peers = htonl (gossip_list_size);
1238 out_msg->num_peers = htonl (send_size);
1239 memcpy (&out_msg[1], gossip_list,
1240 send_size * sizeof (struct GNUNET_PeerIdentity));
1242 GNUNET_MQ_send (mq, ev);
1249 * Handle PULL REPLY message from another peer.
1251 * Check whether we sent a corresponding request and
1252 * whether this reply is the first one.
1254 * @param cls Closure
1255 * @param channel The channel the PUSH was received over
1256 * @param channel_ctx The context associated with this channel
1257 * @param msg The message header
1260 handle_peer_pull_reply (void *cls,
1261 struct GNUNET_CADET_Channel *channel,
1263 const struct GNUNET_MessageHeader *msg)
1265 LOG (GNUNET_ERROR_TYPE_DEBUG, "PULL REPLY received\n");
1267 struct GNUNET_RPS_P2P_PullReplyMessage *in_msg;
1268 struct GNUNET_PeerIdentity *peers;
1269 struct PeerContext *peer_ctx;
1270 struct GNUNET_PeerIdentity *sender;
1271 struct PeerContext *sender_ctx;
1272 struct PeerOutstandingOp out_op;
1275 /* Check for protocol violation */
1276 if (sizeof (struct GNUNET_RPS_P2P_PullReplyMessage) > ntohs (msg->size))
1278 GNUNET_break_op (0);
1279 return GNUNET_SYSERR;
1282 in_msg = (struct GNUNET_RPS_P2P_PullReplyMessage *) msg;
1283 if ((ntohs (msg->size) - sizeof (struct GNUNET_RPS_P2P_PullReplyMessage)) /
1284 sizeof (struct GNUNET_PeerIdentity) != ntohl (in_msg->num_peers))
1286 LOG (GNUNET_ERROR_TYPE_ERROR,
1287 "message says it sends %" PRIu64 " peers, have space for %i peers\n",
1288 ntohl (in_msg->num_peers),
1289 (ntohs (msg->size) - sizeof (struct GNUNET_RPS_P2P_PullReplyMessage)) /
1290 sizeof (struct GNUNET_PeerIdentity));
1291 GNUNET_break_op (0);
1292 return GNUNET_SYSERR;
1295 sender = (struct GNUNET_PeerIdentity *) GNUNET_CADET_channel_get_info (
1296 (struct GNUNET_CADET_Channel *) channel, GNUNET_CADET_OPTION_PEER);
1297 // Guess simply casting isn't the nicest way...
1298 // FIXME wait for cadet to change this function
1299 sender_ctx = get_peer_ctx (peer_map, sender);
1301 if (GNUNET_YES == get_peer_flag (sender_ctx, PULL_REPLY_PENDING))
1303 GNUNET_break_op (0);
1308 /* Do actual logic */
1309 peers = (struct GNUNET_PeerIdentity *) &msg[1];
1310 for (i = 0 ; i < ntohl (in_msg->num_peers) ; i++)
1312 peer_ctx = get_peer_ctx (peer_map, &peers[i]);
1313 if (GNUNET_YES == get_peer_flag (peer_ctx, VALID)
1314 || NULL != peer_ctx->send_channel
1315 || NULL != peer_ctx->recv_channel)
1317 if (GNUNET_NO == in_arr (pull_list, pull_list_size, &peers[i])
1318 && 0 != GNUNET_CRYPTO_cmp_peer_identity (&own_identity, &peers[i]))
1319 GNUNET_array_append (pull_list, pull_list_size, peers[i]);
1321 else if (GNUNET_NO == insert_in_pull_list_scheduled (peer_ctx))
1323 out_op.op = insert_in_pull_list;
1324 out_op.op_cls = NULL;
1325 GNUNET_array_append (peer_ctx->outstanding_ops,
1326 peer_ctx->num_outstanding_ops,
1328 check_peer_live (peer_ctx);
1332 unset_peer_flag (sender_ctx, PULL_REPLY_PENDING);
1333 rem_from_list (&pending_pull_reply_list, &pending_pull_reply_list_size, sender);
1340 do_round (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
1343 do_mal_round (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
1346 #ifdef ENABLE_MALICIOUS
1348 * Turn RPS service to act malicious.
1350 * @param cls Closure
1351 * @param channel The channel the PUSH was received over
1352 * @param channel_ctx The context associated with this channel
1353 * @param msg The message header
1356 handle_client_act_malicious (void *cls,
1357 struct GNUNET_SERVER_Client *client,
1358 const struct GNUNET_MessageHeader *msg)
1360 struct GNUNET_RPS_CS_ActMaliciousMessage *in_msg;
1361 struct GNUNET_PeerIdentity *peers;
1363 /* Check for protocol violation */
1364 if (sizeof (struct GNUNET_RPS_CS_ActMaliciousMessage) > ntohs (msg->size))
1366 GNUNET_break_op (0);
1369 in_msg = (struct GNUNET_RPS_CS_ActMaliciousMessage *) msg;
1370 if ((ntohs (msg->size) - sizeof (struct GNUNET_RPS_CS_ActMaliciousMessage)) /
1371 sizeof (struct GNUNET_PeerIdentity) != ntohl (in_msg->num_peers))
1373 LOG (GNUNET_ERROR_TYPE_ERROR,
1374 "message says it sends %" PRIu64 " peers, have space for %i peers\n",
1375 ntohl (in_msg->num_peers),
1376 (ntohs (msg->size) - sizeof (struct GNUNET_RPS_CS_ActMaliciousMessage)) /
1377 sizeof (struct GNUNET_PeerIdentity));
1378 GNUNET_break_op (0);
1382 /* Do actual logic */
1383 peers = (struct GNUNET_PeerIdentity *) &msg[1];
1384 num_mal_peers = ntohl (in_msg->num_peers);
1385 mal_type = ntohl (in_msg->type);
1386 num_attacked_peers = 0;
1387 attacked_peers = NULL;
1389 LOG (GNUNET_ERROR_TYPE_DEBUG,
1390 "Now acting malicious type %" PRIu32 "\n",
1394 { /* Try to maximise representation */
1395 num_mal_peers = ntohl (in_msg->num_peers);
1396 mal_peers = GNUNET_new_array (num_mal_peers,
1397 struct GNUNET_PeerIdentity);
1398 memcpy (mal_peers, peers, num_mal_peers * sizeof (struct GNUNET_PeerIdentity));
1400 /* Substitute do_round () with do_mal_round () */
1401 GNUNET_SCHEDULER_cancel (do_round_task);
1402 do_round_task = GNUNET_SCHEDULER_add_now (&do_mal_round, NULL);
1404 else if (2 == mal_type)
1405 { /* Try to partition the network */
1406 num_mal_peers = ntohl (in_msg->num_peers) - 1;
1407 mal_peers = GNUNET_new_array (num_mal_peers,
1408 struct GNUNET_PeerIdentity);
1409 memcpy (mal_peers, peers, num_mal_peers);
1411 GNUNET_array_grow (attacked_peers, num_attacked_peers, 1);
1412 memcpy (attacked_peers, &peers[num_mal_peers], 1 * sizeof (struct GNUNET_PeerIdentity));
1414 /* Substitute do_round () with do_mal_round () */
1415 GNUNET_SCHEDULER_cancel (do_round_task);
1416 do_round_task = GNUNET_SCHEDULER_add_now (&do_mal_round, NULL);
1418 else if (0 == mal_type)
1419 { /* Stop acting malicious */
1421 GNUNET_free (mal_peers);
1423 /* Substitute do_mal_round () with do_round () */
1424 GNUNET_SCHEDULER_cancel (do_round_task);
1425 do_round_task = GNUNET_SCHEDULER_add_now (&do_round, NULL);
1436 * Send out PUSHes and PULLs maliciously.
1438 * This is executed regylary.
1441 do_mal_round (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1443 uint32_t num_pushes;
1445 unsigned int rand_delay;
1446 struct GNUNET_TIME_Relative half_round_interval;
1447 struct GNUNET_TIME_Relative time_next_round;
1449 LOG (GNUNET_ERROR_TYPE_DEBUG, "Going to execute next round maliciously.\n");
1451 /* Do malicious actions */
1453 { /* Try to maximise representation */
1454 num_pushes = min (min (push_limit, /* FIXME: attacked peer */ num_mal_peers), GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE);
1455 for (i = 0 ; i < num_pushes ; i++)
1456 { /* Send PUSH to attacked peer */
1457 //GNUNET_CONTAINER_multihashmap_iterator_create
1460 else if (2 == mal_type)
1461 { /* Try to partition the network */
1462 /* Send as many pushes to attacked peer as possible */
1465 /* Compute random time value between .5 * round_interval and 1.5 *round_interval */
1466 half_round_interval = GNUNET_TIME_relative_divide (round_interval, 2);
1470 * Compute random value between (0 and 1) * round_interval
1471 * via multiplying round_interval with a 'fraction' (0 to value)/value
1473 rand_delay = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, UINT_MAX/10);
1474 time_next_round = GNUNET_TIME_relative_multiply (round_interval, rand_delay);
1475 time_next_round = GNUNET_TIME_relative_divide (time_next_round, UINT_MAX/10);
1476 time_next_round = GNUNET_TIME_relative_add (time_next_round, half_round_interval);
1477 } while (GNUNET_TIME_UNIT_FOREVER_REL.rel_value_us == time_next_round.rel_value_us);
1479 /* Schedule next round */
1480 do_round_task = GNUNET_SCHEDULER_add_delayed (round_interval, &do_mal_round, NULL);
1481 LOG (GNUNET_ERROR_TYPE_DEBUG, "Finished round\n");
1483 #endif /* ENABLE_MALICIOUS */
1487 * Send out PUSHes and PULLs, possibly update #gossip_list, samplers.
1489 * This is executed regylary.
1492 do_round (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1494 LOG (GNUNET_ERROR_TYPE_DEBUG, "Going to execute next round.\n");
1497 unsigned int *permut;
1498 unsigned int n_peers; /* Number of peers we send pushes/pulls to */
1499 struct GNUNET_MQ_Envelope *ev;
1500 struct GNUNET_PeerIdentity peer;
1501 struct GNUNET_PeerIdentity *tmp_peer;
1502 struct GNUNET_MQ_Handle *mq;
1504 LOG (GNUNET_ERROR_TYPE_DEBUG,
1505 "Printing gossip list:\n");
1506 for (i = 0 ; i < gossip_list_size ; i++)
1507 LOG (GNUNET_ERROR_TYPE_DEBUG,
1508 "\t%s\n", GNUNET_i2s (&gossip_list[i]));
1509 // TODO log lists, ...
1511 /* Would it make sense to have one shuffeled gossip list and then
1512 * to send PUSHes to first alpha peers, PULL requests to next beta peers and
1513 * use the rest to update sampler?
1514 * in essence get random peers with consumption */
1517 if (0 < gossip_list_size)
1519 permut = GNUNET_CRYPTO_random_permute (GNUNET_CRYPTO_QUALITY_STRONG,
1520 (unsigned int) gossip_list_size);
1521 n_peers = ceil (alpha * gossip_list_size);
1522 LOG (GNUNET_ERROR_TYPE_DEBUG,
1523 "Going to send pushes to %u ceil (%f * %u) peers.\n",
1524 n_peers, alpha, gossip_list_size);
1525 for (i = 0 ; i < n_peers ; i++)
1527 peer = gossip_list[permut[i]];
1528 if (0 != GNUNET_CRYPTO_cmp_peer_identity (&own_identity, &peer)) // TODO
1529 { // FIXME if this fails schedule/loop this for later
1530 LOG (GNUNET_ERROR_TYPE_DEBUG,
1531 "Sending PUSH to peer %s of gossiped list.\n",
1532 GNUNET_i2s (&peer));
1534 ev = GNUNET_MQ_msg_header (GNUNET_MESSAGE_TYPE_RPS_PP_PUSH);
1535 mq = get_mq (peer_map, &peer);
1536 GNUNET_MQ_send (mq, ev);
1539 GNUNET_free (permut);
1543 /* Send PULL requests */
1544 //permut = GNUNET_CRYPTO_random_permute (GNUNET_CRYPTO_QUALITY_STRONG, (unsigned int) sampler_list->size);
1545 n_peers = ceil (beta * gossip_list_size);
1546 LOG (GNUNET_ERROR_TYPE_DEBUG,
1547 "Going to send pulls to %u ceil (%f * %u) peers.\n",
1548 n_peers, beta, gossip_list_size);
1549 for (i = 0 ; i < n_peers ; i++)
1551 tmp_peer = get_rand_peer_ignore_list (gossip_list, gossip_list_size,
1552 pending_pull_reply_list, pending_pull_reply_list_size);
1553 if (NULL != tmp_peer)
1556 GNUNET_free (tmp_peer);
1558 GNUNET_array_append (pending_pull_reply_list, pending_pull_reply_list_size, peer);
1560 if (0 != GNUNET_CRYPTO_cmp_peer_identity (&own_identity, &peer))
1561 { // FIXME if this fails schedule/loop this for later
1562 LOG (GNUNET_ERROR_TYPE_DEBUG,
1563 "Sending PULL request to peer %s of gossiped list.\n",
1564 GNUNET_i2s (&peer));
1566 ev = GNUNET_MQ_msg_header (GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REQUEST);
1567 mq = get_mq (peer_map, &peer);
1568 GNUNET_MQ_send (mq, ev);
1574 /* Update gossip list */
1576 if ( push_list_size <= alpha * gossip_list_size &&
1577 push_list_size != 0 &&
1578 pull_list_size != 0 )
1580 LOG (GNUNET_ERROR_TYPE_DEBUG, "Update of the gossip list.\n");
1582 uint32_t first_border;
1583 uint32_t second_border;
1585 uint32_t peers_to_clean_size;
1586 struct GNUNET_PeerIdentity *peers_to_clean;
1588 peers_to_clean = NULL;
1589 peers_to_clean_size = 0;
1590 GNUNET_array_grow (peers_to_clean, peers_to_clean_size, gossip_list_size);
1591 memcpy (peers_to_clean,
1593 gossip_list_size * sizeof (struct GNUNET_PeerIdentity));
1595 first_border = ceil (alpha * sampler_size_est_need);
1596 second_border = first_border + ceil (beta * sampler_size_est_need);
1598 GNUNET_array_grow (gossip_list, gossip_list_size, second_border);
1600 for (i = 0 ; i < first_border ; i++)
1601 { // TODO use RPS_sampler_get_n_rand_peers
1602 /* Update gossip list with peers received through PUSHes */
1603 r_index = GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_STRONG,
1605 gossip_list[i] = push_list[r_index];
1606 // TODO change the peer_flags accordingly
1609 for (i = first_border ; i < second_border ; i++)
1611 /* Update gossip list with peers received through PULLs */
1612 r_index = GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_STRONG,
1614 gossip_list[i] = pull_list[r_index];
1615 // TODO change the peer_flags accordingly
1618 for (i = second_border ; i < sampler_size_est_need ; i++)
1620 /* Update gossip list with peers from history */
1621 RPS_sampler_get_n_rand_peers (prot_sampler, hist_update, NULL, 1, GNUNET_NO);
1622 num_hist_update_tasks++;
1623 // TODO change the peer_flags accordingly
1626 for (i = 0 ; i < gossip_list_size ; i++)
1627 rem_from_list (&peers_to_clean, &peers_to_clean_size, &gossip_list[i]);
1629 for (i = 0 ; i < peers_to_clean_size ; i++)
1630 peer_clean (&peers_to_clean[i]);
1632 GNUNET_free (peers_to_clean);
1636 LOG (GNUNET_ERROR_TYPE_DEBUG, "No update of the gossip list.\n");
1638 // TODO independent of that also get some peers from CADET_get_peers()?
1641 /* Update samplers */
1642 for ( i = 0 ; i < push_list_size ; i++ )
1644 LOG (GNUNET_ERROR_TYPE_DEBUG,
1645 "Updating with peer %s from push list\n",
1646 GNUNET_i2s (&push_list[i]));
1647 RPS_sampler_update (prot_sampler, &push_list[i]);
1648 RPS_sampler_update (client_sampler, &push_list[i]);
1649 // TODO set in_flag?
1652 for ( i = 0 ; i < pull_list_size ; i++ )
1654 LOG (GNUNET_ERROR_TYPE_DEBUG,
1655 "Updating with peer %s from pull list\n",
1656 GNUNET_i2s (&pull_list[i]));
1657 RPS_sampler_update (prot_sampler, &push_list[i]);
1658 RPS_sampler_update (client_sampler, &push_list[i]);
1659 // TODO set in_flag?
1663 /* Empty push/pull lists */
1664 GNUNET_array_grow (push_list, push_list_size, 0);
1665 GNUNET_array_grow (pull_list, pull_list_size, 0);
1667 struct GNUNET_TIME_Relative time_next_round;
1668 struct GNUNET_TIME_Relative half_round_interval;
1669 unsigned int rand_delay;
1672 /* Compute random time value between .5 * round_interval and 1.5 *round_interval */
1673 half_round_interval = GNUNET_TIME_relative_divide (round_interval, 2);
1677 * Compute random value between (0 and 1) * round_interval
1678 * via multiplying round_interval with a 'fraction' (0 to value)/value
1680 rand_delay = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, UINT_MAX/10);
1681 time_next_round = GNUNET_TIME_relative_multiply (round_interval, rand_delay);
1682 time_next_round = GNUNET_TIME_relative_divide (time_next_round, UINT_MAX/10);
1683 time_next_round = GNUNET_TIME_relative_add (time_next_round, half_round_interval);
1684 } while (GNUNET_TIME_UNIT_FOREVER_REL.rel_value_us == time_next_round.rel_value_us);
1686 /* Schedule next round */
1687 do_round_task = GNUNET_SCHEDULER_add_delayed (round_interval, &do_round, NULL);
1688 LOG (GNUNET_ERROR_TYPE_DEBUG, "Finished round\n");
1693 rps_start (struct GNUNET_SERVER_Handle *server);
1697 * This is called from GNUNET_CADET_get_peers().
1699 * It is called on every peer(ID) that cadet somehow has contact with.
1700 * We use those to initialise the sampler.
1703 init_peer_cb (void *cls,
1704 const struct GNUNET_PeerIdentity *peer,
1705 int tunnel, // "Do we have a tunnel towards this peer?"
1706 unsigned int n_paths, // "Number of known paths towards this peer"
1707 unsigned int best_path) // "How long is the best path?
1708 // (0 = unknown, 1 = ourselves, 2 = neighbor)"
1710 struct PeerOutstandingOp out_op;
1711 struct PeerContext *peer_ctx;
1714 && 0 != GNUNET_CRYPTO_cmp_peer_identity (&own_identity, peer))
1716 LOG (GNUNET_ERROR_TYPE_DEBUG,
1717 "Got peer %s (at %p) from CADET (gossip_list_size: %u)\n",
1718 GNUNET_i2s (peer), peer, gossip_list_size);
1720 // maybe create a function for that
1721 peer_ctx = get_peer_ctx (peer_map, peer);
1722 if (GNUNET_YES != get_peer_flag (peer_ctx, VALID))
1724 if (GNUNET_NO == insert_in_sampler_scheduled (peer_ctx))
1726 out_op.op = insert_in_sampler;
1727 out_op.op_cls = NULL;
1728 GNUNET_array_append (peer_ctx->outstanding_ops,
1729 peer_ctx->num_outstanding_ops,
1733 if (GNUNET_NO == insert_in_gossip_list_scheduled (peer_ctx))
1735 out_op.op = insert_in_gossip_list;
1736 out_op.op_cls = NULL;
1737 GNUNET_array_append (peer_ctx->outstanding_ops,
1738 peer_ctx->num_outstanding_ops,
1742 /* Trigger livelyness test on peer */
1743 check_peer_live (peer_ctx);
1746 // send push/pull to each of those peers?
1752 * Clean the send channel of a peer
1755 peer_clean (const struct GNUNET_PeerIdentity *peer)
1757 struct PeerContext *peer_ctx;
1758 struct GNUNET_CADET_Channel *channel;
1760 if (GNUNET_YES != in_arr (gossip_list, gossip_list_size, peer)
1761 && GNUNET_YES == GNUNET_CONTAINER_multipeermap_contains (peer_map, peer))
1763 peer_ctx = get_peer_ctx (peer_map, peer);
1764 if (NULL != peer_ctx->send_channel)
1766 channel = peer_ctx->send_channel;
1767 peer_ctx->send_channel = NULL;
1768 GNUNET_CADET_channel_destroy (channel);
1775 * Callback used to remove peers from the multipeermap.
1778 peer_remove_cb (void *cls, const struct GNUNET_PeerIdentity *key, void *value)
1780 struct PeerContext *peer_ctx;
1781 const struct GNUNET_CADET_Channel *channel =
1782 (const struct GNUNET_CADET_Channel *) cls;
1783 struct GNUNET_CADET_Channel *recv;
1784 struct GNUNET_CADET_Channel *send;
1786 if (GNUNET_YES == GNUNET_CONTAINER_multipeermap_contains (peer_map, value))
1788 peer_ctx = (struct PeerContext *) value;
1790 if (0 != peer_ctx->num_outstanding_ops)
1791 GNUNET_array_grow (peer_ctx->outstanding_ops,
1792 peer_ctx->num_outstanding_ops,
1795 if (NULL != peer_ctx->mq)
1797 GNUNET_MQ_destroy (peer_ctx->mq);
1798 peer_ctx->mq = NULL;
1802 if (NULL != peer_ctx->is_live_task)
1804 LOG (GNUNET_ERROR_TYPE_DEBUG,
1805 "Trying to cancle is_live_task for peer %s\n",
1807 GNUNET_CADET_notify_transmit_ready_cancel (peer_ctx->is_live_task);
1808 peer_ctx->is_live_task = NULL;
1811 send = peer_ctx->send_channel;
1812 peer_ctx->send_channel = NULL;
1816 GNUNET_CADET_channel_destroy (send);
1819 recv = peer_ctx->send_channel;
1820 peer_ctx->recv_channel = NULL;
1824 GNUNET_CADET_channel_destroy (recv);
1827 if (GNUNET_YES != GNUNET_CONTAINER_multipeermap_remove_all (peer_map, key))
1828 LOG (GNUNET_ERROR_TYPE_WARNING, "removing peer from peer_map failed\n");
1830 GNUNET_free (peer_ctx);
1838 * Task run during shutdown.
1844 shutdown_task (void *cls,
1845 const struct GNUNET_SCHEDULER_TaskContext *tc)
1847 LOG (GNUNET_ERROR_TYPE_DEBUG, "RPS is going down\n");
1849 if (NULL != do_round_task)
1851 GNUNET_SCHEDULER_cancel (do_round_task);
1852 do_round_task = NULL;
1857 if (GNUNET_SYSERR ==
1858 GNUNET_CONTAINER_multipeermap_iterate (peer_map, peer_remove_cb, NULL))
1859 LOG (GNUNET_ERROR_TYPE_WARNING,
1860 "Iterating over peers to disconnect from them was cancelled\n");
1863 GNUNET_NSE_disconnect (nse);
1864 GNUNET_CADET_disconnect (cadet_handle);
1865 RPS_sampler_destroy (prot_sampler);
1866 RPS_sampler_destroy (client_sampler);
1867 LOG (GNUNET_ERROR_TYPE_DEBUG,
1868 "Size of the peermap: %u\n",
1869 GNUNET_CONTAINER_multipeermap_size (peer_map));
1870 GNUNET_break (0 == GNUNET_CONTAINER_multipeermap_size (peer_map));
1871 GNUNET_CONTAINER_multipeermap_destroy (peer_map);
1872 GNUNET_array_grow (gossip_list, gossip_list_size, 0);
1873 GNUNET_array_grow (push_list, push_list_size, 0);
1874 GNUNET_array_grow (pull_list, pull_list_size, 0);
1879 * A client disconnected. Remove all of its data structure entries.
1881 * @param cls closure, NULL
1882 * @param client identification of the client
1885 handle_client_disconnect (void *cls,
1886 struct GNUNET_SERVER_Client * client)
1892 * Handle the channel a peer opens to us.
1894 * @param cls The closure
1895 * @param channel The channel the peer wants to establish
1896 * @param initiator The peer's peer ID
1897 * @param port The port the channel is being established over
1898 * @param options Further options
1901 handle_inbound_channel (void *cls,
1902 struct GNUNET_CADET_Channel *channel,
1903 const struct GNUNET_PeerIdentity *initiator,
1905 enum GNUNET_CADET_ChannelOption options)
1907 struct PeerContext *peer_ctx;
1908 struct GNUNET_PeerIdentity peer;
1911 LOG (GNUNET_ERROR_TYPE_DEBUG,
1912 "New channel was established to us (Peer %s).\n",
1913 GNUNET_i2s (&peer));
1915 GNUNET_assert (NULL != channel);
1917 // we might not even store the recv_channel
1919 peer_ctx = get_peer_ctx (peer_map, &peer);
1920 // FIXME what do we do if a channel is established twice?
1921 // overwrite? Clean old channel? ...?
1922 //if (NULL != peer_ctx->recv_channel)
1924 // peer_ctx->recv_channel = channel;
1926 peer_ctx->recv_channel = channel;
1928 peer_ctx->mq = NULL;
1930 (void) GNUNET_CONTAINER_multipeermap_put (peer_map, &peer, peer_ctx,
1931 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
1933 peer_is_live (peer_ctx);
1935 return NULL; // TODO
1940 * This is called when a remote peer destroys a channel.
1942 * @param cls The closure
1943 * @param channel The channel being closed
1944 * @param channel_ctx The context associated with this channel
1947 cleanup_channel (void *cls,
1948 const struct GNUNET_CADET_Channel *channel,
1951 struct GNUNET_PeerIdentity *peer;
1952 struct PeerContext *peer_ctx;
1954 peer = (struct GNUNET_PeerIdentity *) GNUNET_CADET_channel_get_info (
1955 (struct GNUNET_CADET_Channel *) channel, GNUNET_CADET_OPTION_PEER);
1956 // Guess simply casting isn't the nicest way...
1957 // FIXME wait for cadet to change this function
1958 LOG (GNUNET_ERROR_TYPE_DEBUG, "Cleaning up channel to peer %s\n",
1961 if (GNUNET_YES == GNUNET_CONTAINER_multipeermap_contains (peer_map, peer))
1963 peer_ctx = GNUNET_CONTAINER_multipeermap_get (peer_map, peer);
1965 if (NULL == peer_ctx) /* It could have been removed by shutdown_task */
1968 if (channel == peer_ctx->send_channel)
1969 { /* Peer probably went down */
1970 rem_from_list (&gossip_list, &gossip_list_size, peer);
1971 rem_from_list (&pending_pull_reply_list, &pending_pull_reply_list_size, peer);
1973 /* Somwewhat {ab,re}use the iterator function */
1974 /* Cast to void is ok, because it's used as void in peer_remove_cb */
1975 (void) peer_remove_cb ((void *) channel, peer, peer_ctx);
1977 else /* Other peer doesn't want to send us messages anymore */
1978 peer_ctx->recv_channel = NULL;
1984 * Actually start the service.
1987 rps_start (struct GNUNET_SERVER_Handle *server)
1989 static const struct GNUNET_SERVER_MessageHandler handlers[] = {
1990 {&handle_client_request, NULL, GNUNET_MESSAGE_TYPE_RPS_CS_REQUEST,
1991 sizeof (struct GNUNET_RPS_CS_RequestMessage)},
1992 {&handle_client_seed, NULL, GNUNET_MESSAGE_TYPE_RPS_CS_SEED, 0},
1993 #ifdef ENABLE_MALICIOUS
1994 {&handle_client_act_malicious, NULL, GNUNET_MESSAGE_TYPE_RPS_ACT_MALICIOUS , 0},
1995 #endif /* ENABLE_MALICIOUS */
1999 GNUNET_SERVER_add_handlers (server, handlers);
2000 GNUNET_SERVER_disconnect_notify (server,
2001 &handle_client_disconnect,
2003 LOG (GNUNET_ERROR_TYPE_DEBUG, "Ready to receive requests from clients\n");
2006 do_round_task = GNUNET_SCHEDULER_add_now (&do_round, NULL);
2007 LOG (GNUNET_ERROR_TYPE_DEBUG, "Scheduled first round\n");
2009 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
2016 * Process statistics requests.
2018 * @param cls closure
2019 * @param server the initialized server
2020 * @param c configuration to use
2024 struct GNUNET_SERVER_Handle *server,
2025 const struct GNUNET_CONFIGURATION_Handle *c)
2027 // TODO check what this does -- copied from gnunet-boss
2028 // - seems to work as expected
2029 GNUNET_log_setup ("rps", GNUNET_error_type_to_string (GNUNET_ERROR_TYPE_DEBUG), NULL);
2034 GNUNET_CRYPTO_get_peer_identity (cfg, &own_identity); // TODO check return value
2035 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2036 "STARTING SERVICE (rps) for peer [%s]\n",
2037 GNUNET_i2s (&own_identity));
2038 #ifdef ENABLE_MALICIOUS
2039 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2040 "Malicious execution compiled in.\n");
2041 #endif /* ENABLE_MALICIOUS */
2045 /* Get time interval from the configuration */
2046 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_time (cfg, "RPS",
2050 LOG (GNUNET_ERROR_TYPE_DEBUG, "Failed to read ROUNDINTERVAL from config\n");
2051 GNUNET_SCHEDULER_shutdown ();
2055 /* Get initial size of sampler/gossip list from the configuration */
2056 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_number (cfg, "RPS",
2058 (long long unsigned int *) &sampler_size_est_need))
2060 LOG (GNUNET_ERROR_TYPE_DEBUG, "Failed to read INITSIZE from config\n");
2061 GNUNET_SCHEDULER_shutdown ();
2064 LOG (GNUNET_ERROR_TYPE_DEBUG, "INITSIZE is %" PRIu64 "\n", sampler_size_est_need);
2070 /* connect to NSE */
2071 nse = GNUNET_NSE_connect (cfg, nse_callback, NULL);
2072 // TODO check whether that was successful
2073 LOG (GNUNET_ERROR_TYPE_DEBUG, "Connected to NSE\n");
2079 peer_map = GNUNET_CONTAINER_multipeermap_create (sampler_size_est_need, GNUNET_NO);
2082 /* Initialise cadet */
2083 static const struct GNUNET_CADET_MessageHandler cadet_handlers[] = {
2084 {&handle_peer_push , GNUNET_MESSAGE_TYPE_RPS_PP_PUSH ,
2085 sizeof (struct GNUNET_MessageHeader)},
2086 {&handle_peer_pull_request, GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REQUEST,
2087 sizeof (struct GNUNET_MessageHeader)},
2088 {&handle_peer_pull_reply , GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REPLY , 0},
2092 const uint32_t ports[] = {GNUNET_RPS_CADET_PORT, 0}; // _PORT specified in src/rps/rps.h
2093 cadet_handle = GNUNET_CADET_connect (cfg,
2095 &handle_inbound_channel,
2099 LOG (GNUNET_ERROR_TYPE_DEBUG, "Connected to CADET\n");
2102 /* Initialise sampler */
2103 struct GNUNET_TIME_Relative half_round_interval;
2104 struct GNUNET_TIME_Relative max_round_interval;
2106 half_round_interval = GNUNET_TIME_relative_multiply (round_interval, .5);
2107 max_round_interval = GNUNET_TIME_relative_add (round_interval, half_round_interval);
2109 prot_sampler = RPS_sampler_init (sampler_size_est_need, max_round_interval);
2110 client_sampler = RPS_sampler_init (sampler_size_est_need, max_round_interval);
2112 /* Initialise push and pull maps */
2117 pending_pull_reply_list = NULL;
2118 pending_pull_reply_list_size = 0;
2121 num_hist_update_tasks = 0;
2124 LOG (GNUNET_ERROR_TYPE_DEBUG, "Requesting peers from CADET\n");
2125 GNUNET_CADET_get_peers (cadet_handle, &init_peer_cb, NULL);
2126 // TODO send push/pull to each of those peers?
2134 * The main function for the rps service.
2136 * @param argc number of arguments from the command line
2137 * @param argv command line arguments
2138 * @return 0 ok, 1 on error
2141 main (int argc, char *const *argv)
2143 return (GNUNET_OK ==
2144 GNUNET_SERVICE_run (argc,
2147 GNUNET_SERVICE_OPTION_NONE,
2148 &run, NULL)) ? 0 : 1;
2151 /* end of gnunet-service-rps.c */