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22 * @file rps/gnunet-service-rps.c
23 * @brief rps service implementation
24 * @author Julius Bünger
27 #include "gnunet_util_lib.h"
28 #include "gnunet_cadet_service.h"
29 #include "gnunet_nse_service.h"
32 #include "gnunet-service-rps_sampler.h"
37 #define LOG(kind, ...) GNUNET_log(kind, __VA_ARGS__)
39 // TODO modify @brief in every file
41 // TODO check for overflows
43 // TODO align message structs
45 // (TODO api -- possibility of getting weak random peer immideately)
47 // TODO malicious peer
49 // TODO connect to friends
51 // TODO store peers somewhere
55 // hist_size_init, hist_size_max
60 static const struct GNUNET_CONFIGURATION_Handle *cfg;
65 static struct GNUNET_PeerIdentity own_identity;
68 struct GNUNET_PeerIdentity *
69 get_rand_peer_ignore_list (const struct GNUNET_PeerIdentity *peer_list, unsigned int size,
70 const struct GNUNET_PeerIdentity *ignore_list, unsigned int ignore_size);
73 /***********************************************************************
74 * Housekeeping with peers
75 ***********************************************************************/
78 * Struct used to store the context of a connected client.
83 * The message queue to communicate with the client.
85 struct GNUNET_MQ_Handle *mq;
89 * Used to keep track in what lists single peerIDs are.
93 PULL_REPLY_PENDING = 0x01,
94 IN_OTHER_GOSSIP_LIST = 0x02, // unneeded?
95 IN_OWN_SAMPLER_LIST = 0x04, // unneeded?
96 IN_OWN_GOSSIP_LIST = 0x08, // unneeded?
99 * We set this bit when we can be sure the other peer is/was live.
106 * Functions of this type can be used to be stored at a peer for later execution.
108 typedef void (* PeerOp) (void *cls, const struct GNUNET_PeerIdentity *peer);
111 * Outstanding operation on peer consisting of callback and closure
113 struct PeerOutstandingOp
128 * Struct used to keep track of other peer's status
130 * This is stored in a multipeermap.
135 * In own gossip/sampler list, in other's gossip/sampler list
140 * Message queue open to client
142 struct GNUNET_MQ_Handle *mq;
145 * Channel open to client.
147 struct GNUNET_CADET_Channel *send_channel;
150 * Channel open from client.
152 struct GNUNET_CADET_Channel *recv_channel; // unneeded?
155 * Array of outstanding operations on this peer.
157 struct PeerOutstandingOp *outstanding_ops;
160 * Number of outstanding operations.
162 unsigned int num_outstanding_ops;
163 //size_t num_outstanding_ops;
166 * Handle to the callback given to cadet_ntfy_tmt_rdy()
168 * To be canceled on shutdown.
170 struct GNUNET_CADET_TransmitHandle *is_live_task;
173 * Identity of the peer
175 struct GNUNET_PeerIdentity peer_id;
178 * This is pobably followed by 'statistical' data (when we first saw
179 * him, how did we get his ID, how many pushes (in a timeinterval),
184 /***********************************************************************
185 * /Housekeeping with peers
186 ***********************************************************************/
192 /***********************************************************************
194 ***********************************************************************/
197 * Sampler used for the Brahms protocol itself.
199 static struct RPS_Sampler *prot_sampler;
202 * Sampler used for the clients.
204 static struct RPS_Sampler *client_sampler;
207 * Set of all peers to keep track of them.
209 static struct GNUNET_CONTAINER_MultiPeerMap *peer_map;
213 * The gossiped list of peers.
215 static struct GNUNET_PeerIdentity *gossip_list;
218 * Size of the gossiped list
220 //static unsigned int gossip_list_size;
221 static uint32_t gossip_list_size;
225 * The size of sampler we need to be able to satisfy the client's need of
228 static unsigned int sampler_size_client_need;
231 * The size of sampler we need to be able to satisfy the Brahms protocol's
232 * need of random peers.
234 * This is directly taken as the #gossip_list_size on update of the
237 * This is one minimum size the sampler grows to.
239 static unsigned int sampler_size_est_need;
243 * Percentage of total peer number in the gossip list
244 * to send random PUSHes to
249 * Percentage of total peer number in the gossip list
250 * to send random PULLs to
255 * The percentage gamma of history updates.
256 * Simply 1 - alpha - beta
261 * Identifier for the main task that runs periodically.
263 static struct GNUNET_SCHEDULER_Task *do_round_task;
266 * Time inverval the do_round task runs in.
268 static struct GNUNET_TIME_Relative round_interval;
273 * List to store peers received through pushes temporary.
275 * TODO -> multipeermap
277 static struct GNUNET_PeerIdentity *push_list;
280 * Size of the push_list;
282 static unsigned int push_list_size;
283 //size_t push_list_size;
286 * List to store peers received through pulls temporary.
288 * TODO -> multipeermap
290 static struct GNUNET_PeerIdentity *pull_list;
293 * Size of the pull_list;
295 static unsigned int pull_list_size;
296 //size_t pull_list_size;
302 static struct GNUNET_NSE_Handle *nse;
307 static struct GNUNET_CADET_Handle *cadet_handle;
313 * Only needed in the beginning to check how many of the 64 deltas
316 static unsigned int req_counter;
319 * Time of the last request we received.
321 * Used to compute the expected request rate.
323 static struct GNUNET_TIME_Absolute last_request;
326 * Size of #request_deltas.
328 #define REQUEST_DELTAS_SIZE 64
329 static unsigned int request_deltas_size = REQUEST_DELTAS_SIZE;
332 * Last 64 deltas between requests
334 static struct GNUNET_TIME_Relative request_deltas[REQUEST_DELTAS_SIZE];
337 * The prediction of the rate of requests
339 static struct GNUNET_TIME_Relative request_rate;
343 * List with the peers we sent requests to.
345 struct GNUNET_PeerIdentity *pending_pull_reply_list;
348 * Size of #pending_pull_reply_list.
350 uint32_t pending_pull_reply_list_size;
354 * Number of history update tasks.
356 uint32_t num_hist_update_tasks;
361 * Type of malicious peer
363 * 0 Don't act malicious at all - Default
364 * 1 Try to maximise representation
365 * 2 Try to partition the network
367 uint32_t mal_type = 0;
370 * Other malicious peers
372 static struct GNUNET_PeerIdentity *mal_peers;
375 * Number of other malicious peers
377 static uint32_t num_mal_peers;
380 * If type is 2 this is the attacked peer
382 struct struct GNUNET_PeerIdentity attacked_peer;
383 #endif /* ENABLE_MALICIOUS */
386 /***********************************************************************
388 ***********************************************************************/
395 /***********************************************************************
397 ***********************************************************************/
400 * Set a peer flag of given peer context.
402 #define set_peer_flag(peer_ctx, mask) (peer_ctx->peer_flags |= mask)
405 * Get peer flag of given peer context.
407 #define get_peer_flag(peer_ctx, mask) (peer_ctx->peer_flags & mask ? GNUNET_YES : GNUNET_NO)
410 * Unset flag of given peer context.
412 #define unset_peer_flag(peer_ctx, mask) (peer_ctx->peer_flags &= (~mask))
416 * Clean the send channel of a peer
419 peer_clean (const struct GNUNET_PeerIdentity *peer);
423 * Check if peer is already in peer array.
426 in_arr (const struct GNUNET_PeerIdentity *array,
427 unsigned int arr_size,
428 const struct GNUNET_PeerIdentity *peer)
430 GNUNET_assert (NULL != peer);
435 GNUNET_assert (NULL != array);
439 for (i = 0; i < arr_size ; i++)
440 if (0 == GNUNET_CRYPTO_cmp_peer_identity (&array[i], peer))
447 * Print peerlist to log.
450 print_peer_list (struct GNUNET_PeerIdentity *list, unsigned int len)
454 LOG (GNUNET_ERROR_TYPE_DEBUG,
455 "Printing peer list of length %u at %p:\n",
458 for (i = 0 ; i < len ; i++)
460 LOG (GNUNET_ERROR_TYPE_DEBUG,
462 i, GNUNET_i2s (&list[i]));
468 * Remove peer from list.
471 rem_from_list (struct GNUNET_PeerIdentity **peer_list,
472 unsigned int *list_size,
473 const struct GNUNET_PeerIdentity *peer)
476 struct GNUNET_PeerIdentity *tmp;
480 LOG (GNUNET_ERROR_TYPE_DEBUG,
481 "Removing peer %s from list at %p\n",
485 for ( i = 0 ; i < *list_size ; i++ )
487 if (0 == GNUNET_CRYPTO_cmp_peer_identity (&tmp[i], peer))
489 if (i < *list_size -1)
490 { /* Not at the last entry -- shift peers left */
491 memcpy (&tmp[i], &tmp[i +1],
492 ((*list_size) - i -1) * sizeof (struct GNUNET_PeerIdentity));
494 /* Remove last entry (should be now useless PeerID) */
495 GNUNET_array_grow (tmp, *list_size, (*list_size) -1);
502 * Get random peer from the given list but don't return one from the @a ignore_list.
504 struct GNUNET_PeerIdentity *
505 get_rand_peer_ignore_list (const struct GNUNET_PeerIdentity *peer_list,
507 const struct GNUNET_PeerIdentity *ignore_list,
508 uint32_t ignore_size)
512 struct GNUNET_PeerIdentity *tmp_peer_list;
513 struct GNUNET_PeerIdentity *peer;
515 GNUNET_assert (NULL != peer_list);
520 tmp_peer_list = NULL;
521 GNUNET_array_grow (tmp_peer_list, tmp_size, list_size);
522 memcpy (tmp_peer_list,
524 list_size * sizeof (struct GNUNET_PeerIdentity));
525 peer = GNUNET_new (struct GNUNET_PeerIdentity);
528 * Choose the r_index of the peer we want to return
529 * at random from the interval of the gossip list
531 r_index = GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_STRONG,
533 *peer = tmp_peer_list[r_index];
535 while (in_arr (ignore_list, ignore_size, peer))
537 rem_from_list (&tmp_peer_list, &tmp_size, peer);
539 print_peer_list (tmp_peer_list, tmp_size);
548 * Choose the r_index of the peer we want to return
549 * at random from the interval of the gossip list
551 r_index = GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_STRONG,
553 *peer = tmp_peer_list[r_index];
557 GNUNET_array_grow (tmp_peer_list, tmp_size, 0);
564 * Get the context of a peer. If not existing, create.
567 get_peer_ctx (struct GNUNET_CONTAINER_MultiPeerMap *peer_map,
568 const struct GNUNET_PeerIdentity *peer)
570 struct PeerContext *ctx;
572 if ( GNUNET_YES == GNUNET_CONTAINER_multipeermap_contains (peer_map, peer))
574 ctx = GNUNET_CONTAINER_multipeermap_get (peer_map, peer);
578 ctx = GNUNET_new (struct PeerContext);
581 ctx->send_channel = NULL;
582 ctx->recv_channel = NULL;
583 ctx->outstanding_ops = NULL;
584 ctx->num_outstanding_ops = 0;
585 ctx->is_live_task = NULL;
586 ctx->peer_id = *peer;
587 (void) GNUNET_CONTAINER_multipeermap_put (peer_map, peer, ctx,
588 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
595 * Put random peer from sampler into the gossip list as history update.
598 hist_update (void *cls, struct GNUNET_PeerIdentity *ids, uint32_t num_peers)
600 GNUNET_assert (1 == num_peers);
602 if (gossip_list_size < sampler_size_est_need)
603 GNUNET_array_append (gossip_list, gossip_list_size, *ids);
605 if (0 < num_hist_update_tasks)
606 num_hist_update_tasks--;
611 * Set the peer flag to living and call the outstanding operations on this peer.
614 peer_is_live (struct PeerContext *peer_ctx)
616 struct GNUNET_PeerIdentity *peer;
618 peer = &peer_ctx->peer_id;
619 set_peer_flag (peer_ctx, VALID);
621 LOG (GNUNET_ERROR_TYPE_DEBUG, "Peer %s is live\n", GNUNET_i2s (peer));
623 if (0 != peer_ctx->num_outstanding_ops)
624 { /* Call outstanding operations */
627 for (i = 0 ; i < peer_ctx->num_outstanding_ops ; i++)
628 peer_ctx->outstanding_ops[i].op (peer_ctx->outstanding_ops[i].op_cls, peer);
629 GNUNET_array_grow (peer_ctx->outstanding_ops, peer_ctx->num_outstanding_ops, 0);
637 * Callback that is called when a channel was effectively established.
638 * This is given to ntfy_tmt_rdy and called when the channel was
639 * successfully established.
642 cadet_ntfy_tmt_rdy_cb (void *cls, size_t size, void *buf)
644 struct PeerContext *peer_ctx = (struct PeerContext *) cls;
648 peer_is_live (peer_ctx);
650 //if (NULL != peer_ctx->is_live_task)
652 // LOG (GNUNET_ERROR_TYPE_DEBUG,
653 // "Trying to cancle is_live_task for peer %s\n",
654 // GNUNET_i2s (&peer_ctx->peer_id));
655 // GNUNET_CADET_notify_transmit_ready_cancel (peer_ctx->is_live_task);
656 // peer_ctx->is_live_task = NULL;
658 peer_ctx->is_live_task = NULL;
665 * Get the channel of a peer. If not existing, create.
667 struct GNUNET_CADET_Channel *
668 get_channel (struct GNUNET_CONTAINER_MultiPeerMap *peer_map,
669 const struct GNUNET_PeerIdentity *peer)
671 struct PeerContext *ctx;
673 LOG (GNUNET_ERROR_TYPE_DEBUG,
674 "Trying to establish channel to peer %s\n",
677 ctx = get_peer_ctx (peer_map, peer);
678 if (NULL == ctx->send_channel)
680 ctx->send_channel = GNUNET_CADET_channel_create (cadet_handle,
683 GNUNET_RPS_CADET_PORT,
684 GNUNET_CADET_OPTION_RELIABLE);
686 /* If we don't know whether peer is live,
687 * get notified when we know it is live. */
688 if (GNUNET_YES != get_peer_flag (ctx, VALID)
689 && NULL != ctx->is_live_task
690 && NULL == ctx->recv_channel
691 && NULL == ctx->is_live_task)
693 ctx->peer_id = *peer;
694 LOG (GNUNET_ERROR_TYPE_DEBUG,
695 "Get informed about peer %s getting live\n",
698 GNUNET_CADET_notify_transmit_ready (ctx->send_channel,
700 GNUNET_TIME_UNIT_FOREVER_REL,
701 sizeof (struct GNUNET_MessageHeader),
702 cadet_ntfy_tmt_rdy_cb,
705 // FIXME check whether this is NULL
707 // do I have to explicitly put it in the peer_map?
708 (void) GNUNET_CONTAINER_multipeermap_put
712 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
714 return ctx->send_channel;
719 * Get the message queue of a specific peer.
721 * If we already have a message queue open to this client,
722 * simply return it, otherways create one.
724 struct GNUNET_MQ_Handle *
725 get_mq (struct GNUNET_CONTAINER_MultiPeerMap *peer_map,
726 const struct GNUNET_PeerIdentity *peer_id)
728 struct PeerContext *peer_ctx;
730 peer_ctx = get_peer_ctx (peer_map, peer_id);
732 GNUNET_assert (NULL == peer_ctx->is_live_task);
734 if (NULL == peer_ctx->mq)
736 (void) get_channel (peer_map, peer_id);
737 peer_ctx->mq = GNUNET_CADET_mq_create (peer_ctx->send_channel);
738 //do I have to explicitly put it in the peer_map?
739 (void) GNUNET_CONTAINER_multipeermap_put (peer_map, peer_id, peer_ctx,
740 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
747 * Sum all time relatives of an array.
749 struct GNUNET_TIME_Relative
750 T_relative_sum (const struct GNUNET_TIME_Relative *rel_array, uint32_t arr_size)
752 struct GNUNET_TIME_Relative sum;
755 sum = GNUNET_TIME_UNIT_ZERO;
756 for ( i = 0 ; i < arr_size ; i++ )
758 sum = GNUNET_TIME_relative_add (sum, rel_array[i]);
765 * Compute the average of given time relatives.
767 struct GNUNET_TIME_Relative
768 T_relative_avg (const struct GNUNET_TIME_Relative *rel_array, uint32_t arr_size)
770 return GNUNET_TIME_relative_divide (T_relative_sum (rel_array, arr_size), arr_size);
775 * Insert PeerID in #pull_list
777 * Called once we know a peer is live.
780 insert_in_pull_list (void *cls, const struct GNUNET_PeerIdentity *peer)
782 if (GNUNET_NO == in_arr (pull_list, pull_list_size, peer))
783 GNUNET_array_append (pull_list, pull_list_size, *peer);
789 * Check whether #insert_in_pull_list was already scheduled
792 insert_in_pull_list_scheduled (const struct PeerContext *peer_ctx)
796 for ( i = 0 ; i < peer_ctx->num_outstanding_ops ; i++ )
797 if (insert_in_pull_list == peer_ctx->outstanding_ops[i].op)
804 * Insert PeerID in #gossip_list
806 * Called once we know a peer is live.
809 insert_in_gossip_list (void *cls, const struct GNUNET_PeerIdentity *peer)
811 if (GNUNET_NO == in_arr (gossip_list, gossip_list_size, peer))
812 GNUNET_array_append (gossip_list, gossip_list_size, *peer);
814 (void) get_channel (peer_map, peer);
818 * Check whether #insert_in_gossip_list was already scheduled
821 insert_in_gossip_list_scheduled (const struct PeerContext *peer_ctx)
825 for ( i = 0 ; i < peer_ctx->num_outstanding_ops ; i++ )
826 if (insert_in_gossip_list == peer_ctx->outstanding_ops[i].op)
833 * Update sampler with given PeerID.
836 insert_in_sampler (void *cls, const struct GNUNET_PeerIdentity *peer)
838 LOG (GNUNET_ERROR_TYPE_DEBUG,
839 "Updating samplers with peer %s from insert_in_sampler()\n",
841 RPS_sampler_update (prot_sampler, peer);
842 RPS_sampler_update (client_sampler, peer);
847 * Check whether #insert_in_sampler was already scheduled
850 insert_in_sampler_scheduled (const struct PeerContext *peer_ctx)
854 for ( i = 0 ; i < peer_ctx->num_outstanding_ops ; i++ )
855 if (insert_in_sampler== peer_ctx->outstanding_ops[i].op)
862 * Wrapper around #RPS_sampler_resize()
864 * If we do not have enough sampler elements, double current sampler size
865 * If we have more than enough sampler elements, halv current sampler size
868 resize_wrapper (struct RPS_Sampler *sampler, uint32_t new_size)
870 unsigned int sampler_size;
873 // TODO respect the min, max
874 sampler_size = RPS_sampler_get_size (sampler);
875 if (sampler_size > new_size * 4)
877 RPS_sampler_resize (sampler, sampler_size / 2);
879 else if (sampler_size < new_size)
881 RPS_sampler_resize (sampler, sampler_size * 2);
883 LOG (GNUNET_ERROR_TYPE_DEBUG, "sampler_size is now %u\n", sampler_size);
888 * Wrapper around #RPS_sampler_resize() resizing the client sampler
891 client_resize_wrapper ()
893 uint32_t bigger_size;
894 unsigned int sampler_size;
898 sampler_size = RPS_sampler_get_size (client_sampler);
900 if (sampler_size_est_need > sampler_size_client_need)
901 bigger_size = sampler_size_est_need;
903 bigger_size = sampler_size_client_need;
905 // TODO respect the min, max
906 resize_wrapper (client_sampler, bigger_size);
907 LOG (GNUNET_ERROR_TYPE_DEBUG, "sampler_size is now %u\n", sampler_size);
912 * Estimate request rate
914 * Called every time we receive a request from the client.
919 struct GNUNET_TIME_Relative max_round_duration;
921 if (request_deltas_size > req_counter)
923 if ( 1 < req_counter)
925 /* Shift last request deltas to the right */
926 memcpy (&request_deltas[1],
928 (req_counter - 1) * sizeof (struct GNUNET_TIME_Relative));
930 /* Add current delta to beginning */
932 GNUNET_TIME_absolute_get_difference (last_request,
933 GNUNET_TIME_absolute_get ());
934 request_rate = T_relative_avg (request_deltas, req_counter);
936 /* Compute the duration a round will maximally take */
938 GNUNET_TIME_relative_add (round_interval,
939 GNUNET_TIME_relative_divide (round_interval, 2));
941 /* Set the estimated size the sampler has to have to
942 * satisfy the current client request rate */
943 sampler_size_client_need =
944 max_round_duration.rel_value_us / request_rate.rel_value_us;
946 /* Resize the sampler */
947 client_resize_wrapper ();
949 last_request = GNUNET_TIME_absolute_get ();
953 /***********************************************************************
955 ***********************************************************************/
962 * Function called by NSE.
964 * Updates sizes of sampler list and gossip list and adapt those lists
968 nse_callback (void *cls, struct GNUNET_TIME_Absolute timestamp,
969 double logestimate, double std_dev)
972 //double scale; // TODO this might go gloabal/config
974 LOG (GNUNET_ERROR_TYPE_DEBUG,
975 "Received a ns estimate - logest: %f, std_dev: %f (old_size: %u)\n",
976 logestimate, std_dev, RPS_sampler_get_size (prot_sampler));
978 estimate = GNUNET_NSE_log_estimate_to_n (logestimate);
979 // GNUNET_NSE_log_estimate_to_n (logestimate);
980 estimate = pow (estimate, 1.0 / 3);
981 // TODO add if std_dev is a number
982 // estimate += (std_dev * scale);
983 if (2 < ceil (estimate))
985 LOG (GNUNET_ERROR_TYPE_DEBUG, "Changing estimate to %f\n", estimate);
986 sampler_size_est_need = estimate;
988 LOG (GNUNET_ERROR_TYPE_DEBUG, "Not using estimate %f\n", estimate);
990 /* If the NSE has changed adapt the lists accordingly */
991 resize_wrapper (prot_sampler, sampler_size_est_need);
992 client_resize_wrapper ();
997 * Callback called once the requested PeerIDs are ready.
999 * Sends those to the requesting client.
1001 void client_respond (void *cls,
1002 struct GNUNET_PeerIdentity *ids, uint32_t num_peers)
1004 LOG (GNUNET_ERROR_TYPE_DEBUG, "sampler returned %" PRIX32 " peers\n", num_peers);
1005 struct GNUNET_MQ_Envelope *ev;
1006 struct GNUNET_RPS_CS_ReplyMessage *out_msg;
1007 struct GNUNET_SERVER_Client *client;
1008 uint32_t size_needed;
1009 struct client_ctx *cli_ctx;
1011 client = (struct GNUNET_SERVER_Client *) cls;
1013 size_needed = sizeof (struct GNUNET_RPS_CS_ReplyMessage) +
1014 num_peers * sizeof (struct GNUNET_PeerIdentity);
1016 GNUNET_assert (GNUNET_SERVER_MAX_MESSAGE_SIZE >= size_needed);
1018 ev = GNUNET_MQ_msg_extra (out_msg,
1019 num_peers * sizeof (struct GNUNET_PeerIdentity),
1020 GNUNET_MESSAGE_TYPE_RPS_CS_REPLY);
1021 out_msg->num_peers = htonl (num_peers);
1023 memcpy (&out_msg[1],
1025 num_peers * sizeof (struct GNUNET_PeerIdentity));
1028 cli_ctx = GNUNET_SERVER_client_get_user_context (client, struct client_ctx);
1029 if ( NULL == cli_ctx ) {
1030 cli_ctx = GNUNET_new (struct client_ctx);
1031 cli_ctx->mq = GNUNET_MQ_queue_for_server_client (client);
1032 GNUNET_SERVER_client_set_user_context (client, cli_ctx);
1035 GNUNET_MQ_send (cli_ctx->mq, ev);
1040 * Handle RPS request from the client.
1042 * @param cls closure
1043 * @param client identification of the client
1044 * @param message the actual message
1047 handle_client_request (void *cls,
1048 struct GNUNET_SERVER_Client *client,
1049 const struct GNUNET_MessageHeader *message)
1051 struct GNUNET_RPS_CS_RequestMessage *msg;
1053 uint32_t size_needed;
1056 msg = (struct GNUNET_RPS_CS_RequestMessage *) message;
1058 num_peers = ntohl (msg->num_peers);
1059 size_needed = sizeof (struct GNUNET_RPS_CS_ReplyMessage) +
1060 num_peers * sizeof (struct GNUNET_PeerIdentity);
1062 if (GNUNET_SERVER_MAX_MESSAGE_SIZE < size_needed)
1064 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
1068 for (i = 0 ; i < num_peers ; i++)
1071 LOG (GNUNET_ERROR_TYPE_DEBUG, "Client requested %" PRIX32 " random peer(s).\n", num_peers);
1073 RPS_sampler_get_n_rand_peers (client_sampler, client_respond,
1074 client, num_peers, GNUNET_YES);
1076 GNUNET_SERVER_receive_done (client,
1082 * Handle seed from the client.
1084 * @param cls closure
1085 * @param client identification of the client
1086 * @param message the actual message
1089 handle_client_seed (void *cls,
1090 struct GNUNET_SERVER_Client *client,
1091 const struct GNUNET_MessageHeader *message)
1093 struct GNUNET_RPS_CS_SeedMessage *in_msg;
1094 struct GNUNET_PeerIdentity *peers;
1098 if (sizeof (struct GNUNET_RPS_CS_SeedMessage) > ntohs (message->size))
1100 GNUNET_break_op (0);
1101 GNUNET_SERVER_receive_done (client,
1105 in_msg = (struct GNUNET_RPS_CS_SeedMessage *) message;
1106 num_peers = ntohl (in_msg->num_peers);
1107 peers = (struct GNUNET_PeerIdentity *) &in_msg[1];
1108 //peers = GNUNET_new_array (num_peers, struct GNUNET_PeerIdentity);
1109 //memcpy (peers, &in_msg[1], num_peers * sizeof (struct GNUNET_PeerIdentity));
1111 if ((ntohs (message->size) - sizeof (struct GNUNET_RPS_CS_SeedMessage)) /
1112 sizeof (struct GNUNET_PeerIdentity) != num_peers)
1114 GNUNET_break_op (0);
1115 GNUNET_SERVER_receive_done (client,
1119 LOG (GNUNET_ERROR_TYPE_DEBUG,
1120 "Client seeded peers:\n");
1121 print_peer_list (peers, num_peers);
1123 // TODO check for validity of ids
1125 for (i = 0 ; i < num_peers ; i++)
1127 LOG (GNUNET_ERROR_TYPE_DEBUG,
1128 "Updating samplers with seed %" PRIX32 ": %s\n",
1130 GNUNET_i2s (&peers[i]));
1132 RPS_sampler_update (prot_sampler, &peers[i]);
1133 RPS_sampler_update (client_sampler, &peers[i]);
1136 //GNUNET_free (peers);
1138 GNUNET_SERVER_receive_done (client,
1144 * Handle a PUSH message from another peer.
1146 * Check the proof of work and store the PeerID
1147 * in the temporary list for pushed PeerIDs.
1149 * @param cls Closure
1150 * @param channel The channel the PUSH was received over
1151 * @param channel_ctx The context associated with this channel
1152 * @param msg The message header
1155 handle_peer_push (void *cls,
1156 struct GNUNET_CADET_Channel *channel,
1158 const struct GNUNET_MessageHeader *msg)
1160 const struct GNUNET_PeerIdentity *peer;
1162 // (check the proof of work)
1164 peer = (const struct GNUNET_PeerIdentity *) GNUNET_CADET_channel_get_info (channel, GNUNET_CADET_OPTION_PEER);
1165 // FIXME wait for cadet to change this function
1166 LOG (GNUNET_ERROR_TYPE_DEBUG, "PUSH received (%s)\n", GNUNET_i2s (peer));
1168 /* Add the sending peer to the push_list */
1169 if (GNUNET_NO == in_arr (push_list, push_list_size, peer))
1170 GNUNET_array_append (push_list, push_list_size, *peer);
1176 * Handle PULL REQUEST request message from another peer.
1178 * Reply with the gossip list of PeerIDs.
1180 * @param cls Closure
1181 * @param channel The channel the PUSH was received over
1182 * @param channel_ctx The context associated with this channel
1183 * @param msg The message header
1186 handle_peer_pull_request (void *cls,
1187 struct GNUNET_CADET_Channel *channel,
1189 const struct GNUNET_MessageHeader *msg)
1191 struct GNUNET_PeerIdentity *peer;
1193 struct GNUNET_MQ_Handle *mq;
1194 struct GNUNET_MQ_Envelope *ev;
1195 struct GNUNET_RPS_P2P_PullReplyMessage *out_msg;
1198 peer = (struct GNUNET_PeerIdentity *) GNUNET_CADET_channel_get_info (channel,
1199 GNUNET_CADET_OPTION_PEER);
1200 // FIXME wait for cadet to change this function
1202 /* Compute actual size */
1203 send_size = sizeof (struct GNUNET_RPS_P2P_PullReplyMessage) +
1204 gossip_list_size * sizeof (struct GNUNET_PeerIdentity);
1206 if (GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE < send_size)
1207 /* Compute number of peers to send
1208 * If too long, simply truncate */
1210 (GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE -
1211 sizeof (struct GNUNET_RPS_P2P_PullReplyMessage)) /
1212 sizeof (struct GNUNET_PeerIdentity);
1214 send_size = gossip_list_size;
1216 LOG (GNUNET_ERROR_TYPE_DEBUG,
1217 "PULL REQUEST from peer %s received, going to send %u peers\n",
1218 GNUNET_i2s (peer), send_size);
1220 mq = get_mq (peer_map, peer);
1222 ev = GNUNET_MQ_msg_extra (out_msg,
1223 send_size * sizeof (struct GNUNET_PeerIdentity),
1224 GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REPLY);
1225 //out_msg->num_peers = htonl (gossip_list_size);
1226 out_msg->num_peers = htonl (send_size);
1227 memcpy (&out_msg[1], gossip_list,
1228 send_size * sizeof (struct GNUNET_PeerIdentity));
1230 GNUNET_MQ_send (mq, ev);
1237 * Handle PULL REPLY message from another peer.
1239 * Check whether we sent a corresponding request and
1240 * whether this reply is the first one.
1242 * @param cls Closure
1243 * @param channel The channel the PUSH was received over
1244 * @param channel_ctx The context associated with this channel
1245 * @param msg The message header
1248 handle_peer_pull_reply (void *cls,
1249 struct GNUNET_CADET_Channel *channel,
1251 const struct GNUNET_MessageHeader *msg)
1253 LOG (GNUNET_ERROR_TYPE_DEBUG, "PULL REPLY received\n");
1255 struct GNUNET_RPS_P2P_PullReplyMessage *in_msg;
1256 struct GNUNET_PeerIdentity *peers;
1257 struct PeerContext *peer_ctx;
1258 struct GNUNET_PeerIdentity *sender;
1259 struct PeerContext *sender_ctx;
1260 struct PeerOutstandingOp out_op;
1263 /* Check for protocol violation */
1264 if (sizeof (struct GNUNET_RPS_P2P_PullReplyMessage) > ntohs (msg->size))
1266 GNUNET_break_op (0);
1267 return GNUNET_SYSERR;
1270 in_msg = (struct GNUNET_RPS_P2P_PullReplyMessage *) msg;
1271 if ((ntohs (msg->size) - sizeof (struct GNUNET_RPS_P2P_PullReplyMessage)) /
1272 sizeof (struct GNUNET_PeerIdentity) != ntohl (in_msg->num_peers))
1274 LOG (GNUNET_ERROR_TYPE_ERROR,
1275 "message says it sends %" PRIu64 " peers, have space for %i peers\n",
1276 ntohl (in_msg->num_peers),
1277 (ntohs (msg->size) - sizeof (struct GNUNET_RPS_P2P_PullReplyMessage)) /
1278 sizeof (struct GNUNET_PeerIdentity));
1279 GNUNET_break_op (0);
1280 return GNUNET_SYSERR;
1283 sender = (struct GNUNET_PeerIdentity *) GNUNET_CADET_channel_get_info (
1284 (struct GNUNET_CADET_Channel *) channel, GNUNET_CADET_OPTION_PEER);
1285 // Guess simply casting isn't the nicest way...
1286 // FIXME wait for cadet to change this function
1287 sender_ctx = get_peer_ctx (peer_map, sender);
1289 if (GNUNET_YES == get_peer_flag (sender_ctx, PULL_REPLY_PENDING))
1291 GNUNET_break_op (0);
1295 /* Do actual logic */
1296 peers = (struct GNUNET_PeerIdentity *) &msg[1];
1297 for (i = 0 ; i < ntohl (in_msg->num_peers) ; i++)
1299 peer_ctx = get_peer_ctx (peer_map, &peers[i]);
1300 if (GNUNET_YES == get_peer_flag (peer_ctx, VALID)
1301 || NULL != peer_ctx->send_channel
1302 || NULL != peer_ctx->recv_channel)
1304 if (GNUNET_NO == in_arr (pull_list, pull_list_size, &peers[i])
1305 && GNUNET_CRYPTO_cmp_peer_identity (&own_identity, &peers[i]))
1306 GNUNET_array_append (pull_list, pull_list_size, peers[i]);
1308 else if (GNUNET_NO == insert_in_pull_list_scheduled (peer_ctx))
1310 out_op.op = insert_in_pull_list;
1311 out_op.op_cls = NULL;
1312 GNUNET_array_append (peer_ctx->outstanding_ops,
1313 peer_ctx->num_outstanding_ops,
1318 unset_peer_flag (sender_ctx, PULL_REPLY_PENDING);
1319 rem_from_list (&pending_pull_reply_list, &pending_pull_reply_list_size, sender);
1325 #if ENABLE_MALICIOUS
1327 * Turn RPS service to act malicious.
1329 * @param cls Closure
1330 * @param channel The channel the PUSH was received over
1331 * @param channel_ctx The context associated with this channel
1332 * @param msg The message header
1335 handle_peer_act_malicious (void *cls,
1336 struct GNUNET_CADET_Channel *channel,
1338 const struct GNUNET_MessageHeader *msg)
1340 struct GNUNET_PeerIdentity *peers;
1342 LOG (GNUNET_ERROR_TYPE_DEBUG, "PULL REPLY received\n");
1344 /* Check for protocol violation */
1345 if (sizeof (struct GNUNET_RPS_P2P_PullReplyMessage) > ntohs (msg->size))
1347 GNUNET_break_op (0);
1348 return GNUNET_SYSERR;
1351 in_msg = (struct GNUNET_RPS_CS_ActMaliciousMessage *) msg;
1352 if ((ntohs (msg->size) - sizeof (struct GNUNET_RPS_CS_ActMaliciousMessage)) /
1353 sizeof (struct GNUNET_PeerIdentity) != ntohl (in_msg->num_peers))
1355 LOG (GNUNET_ERROR_TYPE_ERROR,
1356 "message says it sends %" PRIu64 " peers, have space for %i peers\n",
1357 ntohl (in_msg->num_peers),
1358 (ntohs (msg->size) - sizeof (struct GNUNET_RPS_CS_ActMaliciousMessage)) /
1359 sizeof (struct GNUNET_PeerIdentity));
1360 GNUNET_break_op (0);
1361 return GNUNET_SYSERR;
1364 sender = (struct GNUNET_PeerIdentity *) GNUNET_CADET_channel_get_info (
1365 (struct GNUNET_CADET_Channel *) channel, GNUNET_CADET_OPTION_PEER);
1366 // Guess simply casting isn't the nicest way...
1367 // FIXME wait for cadet to change this function
1368 sender_ctx = get_peer_ctx (peer_map, sender);
1370 if (GNUNET_YES == get_peer_flag (sender_ctx, PULL_REPLY_PENDING))
1372 GNUNET_break_op (0);
1376 /* Do actual logic */
1377 peers = (struct GNUNET_PeerIdentity *) &msg[1];
1378 num_peers = ntohl (in_msg->num_peers);
1379 mal_type = ntohl (in_msg->type);
1382 { /* Try to maximise representation */
1383 num_mal_peers = ntohl (in_msg->num_peers);
1384 mal_peers = GNUNET_new_array (num_mal_peers,
1385 struct GNUNET_PeerIdentity);
1386 memcpy (mal_peers, peers, num_mal_peers);
1388 else if (2 == mal_type)
1389 { /* Try to partition the network */
1390 num_mal_peers = ntohl (in_msg->num_peers) - 1;
1391 mal_peers = GNUNET_new_array (num_mal_peers,
1392 struct GNUNET_PeerIdentity);
1393 memcpy (mal_peers, peers, num_mal_peers);
1394 attacked_peer = peers[num_mal_peers];
1397 #endif /* ENABLE_MALICIOUS */
1401 * Send out PUSHes and PULLs.
1403 * This is executed regylary.
1406 do_round (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1408 LOG (GNUNET_ERROR_TYPE_DEBUG, "Going to execute next round\n");
1411 unsigned int *permut;
1412 unsigned int n_peers; /* Number of peers we send pushes/pulls to */
1413 struct GNUNET_MQ_Envelope *ev;
1414 struct GNUNET_PeerIdentity peer;
1415 struct GNUNET_PeerIdentity *tmp_peer;
1416 struct GNUNET_MQ_Handle *mq;
1418 LOG (GNUNET_ERROR_TYPE_DEBUG,
1419 "Printing gossip list:\n");
1420 for (i = 0 ; i < gossip_list_size ; i++)
1421 LOG (GNUNET_ERROR_TYPE_DEBUG,
1422 "\t%s\n", GNUNET_i2s (&gossip_list[i]));
1423 // TODO log lists, ...
1425 /* Would it make sense to have one shuffeled gossip list and then
1426 * to send PUSHes to first alpha peers, PULL requests to next beta peers and
1427 * use the rest to update sampler?
1428 * in essence get random peers with consumption */
1431 if (0 < gossip_list_size)
1433 permut = GNUNET_CRYPTO_random_permute (GNUNET_CRYPTO_QUALITY_STRONG,
1434 (unsigned int) gossip_list_size);
1435 n_peers = ceil (alpha * gossip_list_size);
1436 LOG (GNUNET_ERROR_TYPE_DEBUG,
1437 "Going to send pushes to %u ceil (%f * %u) peers.\n",
1438 n_peers, alpha, gossip_list_size);
1439 for (i = 0 ; i < n_peers ; i++)
1441 peer = gossip_list[permut[i]];
1442 if (0 != GNUNET_CRYPTO_cmp_peer_identity (&own_identity, &peer)) // TODO
1443 { // FIXME if this fails schedule/loop this for later
1444 LOG (GNUNET_ERROR_TYPE_DEBUG,
1445 "Sending PUSH to peer %s of gossiped list.\n",
1446 GNUNET_i2s (&peer));
1448 ev = GNUNET_MQ_msg_header (GNUNET_MESSAGE_TYPE_RPS_PP_PUSH);
1449 mq = get_mq (peer_map, &peer);
1450 GNUNET_MQ_send (mq, ev);
1453 GNUNET_free (permut);
1457 /* Send PULL requests */
1458 //permut = GNUNET_CRYPTO_random_permute (GNUNET_CRYPTO_QUALITY_STRONG, (unsigned int) sampler_list->size);
1459 n_peers = ceil (beta * gossip_list_size);
1460 LOG (GNUNET_ERROR_TYPE_DEBUG,
1461 "Going to send pulls to %u ceil (%f * %u) peers.\n",
1462 n_peers, beta, gossip_list_size);
1463 for (i = 0 ; i < n_peers ; i++)
1465 tmp_peer = get_rand_peer_ignore_list (gossip_list, gossip_list_size,
1466 pending_pull_reply_list, pending_pull_reply_list_size);
1467 if (NULL != tmp_peer)
1470 GNUNET_free (tmp_peer);
1472 GNUNET_array_append (pending_pull_reply_list, pending_pull_reply_list_size, peer);
1474 if (0 != GNUNET_CRYPTO_cmp_peer_identity (&own_identity, &peer))
1475 { // FIXME if this fails schedule/loop this for later
1476 LOG (GNUNET_ERROR_TYPE_DEBUG,
1477 "Sending PULL request to peer %s of gossiped list.\n",
1478 GNUNET_i2s (&peer));
1480 ev = GNUNET_MQ_msg_header (GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REQUEST);
1481 mq = get_mq (peer_map, &peer);
1482 GNUNET_MQ_send (mq, ev);
1488 /* Update gossip list */
1490 if ( push_list_size <= alpha * gossip_list_size &&
1491 push_list_size != 0 &&
1492 pull_list_size != 0 )
1494 LOG (GNUNET_ERROR_TYPE_DEBUG, "Update of the gossip list.\n");
1496 uint32_t first_border;
1497 uint32_t second_border;
1499 uint32_t peers_to_clean_size;
1500 struct GNUNET_PeerIdentity *peers_to_clean;
1502 peers_to_clean = NULL;
1503 peers_to_clean_size = 0;
1504 GNUNET_array_grow (peers_to_clean, peers_to_clean_size, gossip_list_size);
1505 memcpy (peers_to_clean,
1507 gossip_list_size * sizeof (struct GNUNET_PeerIdentity));
1509 first_border = ceil (alpha * sampler_size_est_need);
1510 second_border = first_border + ceil (beta * sampler_size_est_need);
1512 GNUNET_array_grow (gossip_list, gossip_list_size, second_border);
1514 for (i = 0 ; i < first_border ; i++)
1515 { // TODO use RPS_sampler_get_n_rand_peers
1516 /* Update gossip list with peers received through PUSHes */
1517 r_index = GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_STRONG,
1519 gossip_list[i] = push_list[r_index];
1520 // TODO change the peer_flags accordingly
1523 for (i = first_border ; i < second_border ; i++)
1525 /* Update gossip list with peers received through PULLs */
1526 r_index = GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_STRONG,
1528 gossip_list[i] = pull_list[r_index];
1529 // TODO change the peer_flags accordingly
1532 for (i = second_border ; i < sampler_size_est_need ; i++)
1534 /* Update gossip list with peers from history */
1535 RPS_sampler_get_n_rand_peers (prot_sampler, hist_update, NULL, 1, GNUNET_NO);
1536 num_hist_update_tasks++;
1537 // TODO change the peer_flags accordingly
1540 for (i = 0 ; i < gossip_list_size ; i++)
1541 rem_from_list (&peers_to_clean, &peers_to_clean_size, &gossip_list[i]);
1543 for (i = 0 ; i < peers_to_clean_size ; i++)
1544 peer_clean (&peers_to_clean[i]);
1546 GNUNET_free (peers_to_clean);
1550 LOG (GNUNET_ERROR_TYPE_DEBUG, "No update of the gossip list.\n");
1552 // TODO independent of that also get some peers from CADET_get_peers()?
1555 /* Update samplers */
1556 for ( i = 0 ; i < push_list_size ; i++ )
1558 LOG (GNUNET_ERROR_TYPE_DEBUG,
1559 "Updating with peer %s from push list\n",
1560 GNUNET_i2s (&push_list[i]));
1561 RPS_sampler_update (prot_sampler, &push_list[i]);
1562 RPS_sampler_update (client_sampler, &push_list[i]);
1563 // TODO set in_flag?
1566 for ( i = 0 ; i < pull_list_size ; i++ )
1568 LOG (GNUNET_ERROR_TYPE_DEBUG,
1569 "Updating with peer %s from pull list\n",
1570 GNUNET_i2s (&pull_list[i]));
1571 RPS_sampler_update (prot_sampler, &push_list[i]);
1572 RPS_sampler_update (client_sampler, &push_list[i]);
1573 // TODO set in_flag?
1577 /* Empty push/pull lists */
1578 GNUNET_array_grow (push_list, push_list_size, 0);
1579 GNUNET_array_grow (pull_list, pull_list_size, 0);
1581 struct GNUNET_TIME_Relative time_next_round;
1582 struct GNUNET_TIME_Relative half_round_interval;
1583 unsigned int rand_delay;
1586 /* Compute random time value between .5 * round_interval and 1.5 *round_interval */
1587 half_round_interval = GNUNET_TIME_relative_divide (round_interval, 2);
1591 * Compute random value between (0 and 1) * round_interval
1592 * via multiplying round_interval with a 'fraction' (0 to value)/value
1594 rand_delay = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, UINT_MAX/10);
1595 time_next_round = GNUNET_TIME_relative_multiply (round_interval, rand_delay);
1596 time_next_round = GNUNET_TIME_relative_divide (time_next_round, UINT_MAX/10);
1597 time_next_round = GNUNET_TIME_relative_add (time_next_round, half_round_interval);
1598 } while (GNUNET_TIME_UNIT_FOREVER_REL.rel_value_us == time_next_round.rel_value_us);
1600 /* Schedule next round */
1601 do_round_task = GNUNET_SCHEDULER_add_delayed (round_interval, &do_round, NULL);
1602 LOG (GNUNET_ERROR_TYPE_DEBUG, "Finished round\n");
1607 rps_start (struct GNUNET_SERVER_Handle *server);
1611 * This is called from GNUNET_CADET_get_peers().
1613 * It is called on every peer(ID) that cadet somehow has contact with.
1614 * We use those to initialise the sampler.
1617 init_peer_cb (void *cls,
1618 const struct GNUNET_PeerIdentity *peer,
1619 int tunnel, // "Do we have a tunnel towards this peer?"
1620 unsigned int n_paths, // "Number of known paths towards this peer"
1621 unsigned int best_path) // "How long is the best path?
1622 // (0 = unknown, 1 = ourselves, 2 = neighbor)"
1624 struct PeerOutstandingOp out_op;
1625 struct PeerContext *peer_ctx;
1628 && 0 != GNUNET_CRYPTO_cmp_peer_identity (&own_identity, peer))
1630 LOG (GNUNET_ERROR_TYPE_DEBUG,
1631 "Got peer %s (at %p) from CADET (gossip_list_size: %u)\n",
1632 GNUNET_i2s (peer), peer, gossip_list_size);
1634 // maybe create a function for that
1635 peer_ctx = get_peer_ctx (peer_map, peer);
1636 if (GNUNET_YES != get_peer_flag (peer_ctx, VALID))
1638 if (GNUNET_NO == insert_in_sampler_scheduled (peer_ctx))
1640 out_op.op = insert_in_sampler;
1641 out_op.op_cls = NULL;
1642 GNUNET_array_append (peer_ctx->outstanding_ops,
1643 peer_ctx->num_outstanding_ops,
1647 if (GNUNET_NO == insert_in_gossip_list_scheduled (peer_ctx))
1649 out_op.op = insert_in_gossip_list;
1650 out_op.op_cls = NULL;
1651 GNUNET_array_append (peer_ctx->outstanding_ops,
1652 peer_ctx->num_outstanding_ops,
1656 /* Trigger livelyness test on peer */
1657 (void) get_channel (peer_map, peer);
1660 // send push/pull to each of those peers?
1666 * Clean the send channel of a peer
1669 peer_clean (const struct GNUNET_PeerIdentity *peer)
1671 struct PeerContext *peer_ctx;
1672 struct GNUNET_CADET_Channel *channel;
1674 if (GNUNET_YES != in_arr (gossip_list, gossip_list_size, peer)
1675 && GNUNET_YES == GNUNET_CONTAINER_multipeermap_contains (peer_map, peer))
1677 peer_ctx = get_peer_ctx (peer_map, peer);
1678 if (NULL != peer_ctx->send_channel)
1680 channel = peer_ctx->send_channel;
1681 peer_ctx->send_channel = NULL;
1682 GNUNET_CADET_channel_destroy (channel);
1689 * Callback used to remove peers from the multipeermap.
1692 peer_remove_cb (void *cls, const struct GNUNET_PeerIdentity *key, void *value)
1694 struct PeerContext *peer_ctx;
1695 const struct GNUNET_CADET_Channel *channel =
1696 (const struct GNUNET_CADET_Channel *) cls;
1697 struct GNUNET_CADET_Channel *recv;
1698 struct GNUNET_CADET_Channel *send;
1700 if (GNUNET_YES == GNUNET_CONTAINER_multipeermap_contains (peer_map, value))
1702 peer_ctx = (struct PeerContext *) value;
1704 if (0 != peer_ctx->num_outstanding_ops)
1705 GNUNET_array_grow (peer_ctx->outstanding_ops,
1706 peer_ctx->num_outstanding_ops,
1709 if (NULL != peer_ctx->mq)
1710 GNUNET_MQ_destroy (peer_ctx->mq);
1712 if (NULL != peer_ctx->is_live_task)
1714 LOG (GNUNET_ERROR_TYPE_DEBUG,
1715 "Trying to cancle is_live_task for peer %s\n",
1717 GNUNET_CADET_notify_transmit_ready_cancel (peer_ctx->is_live_task);
1718 peer_ctx->is_live_task = NULL;
1721 send = peer_ctx->send_channel;
1722 peer_ctx->send_channel = NULL;
1726 GNUNET_CADET_channel_destroy (send);
1729 recv = peer_ctx->send_channel;
1730 peer_ctx->recv_channel = NULL;
1734 GNUNET_CADET_channel_destroy (recv);
1737 if (GNUNET_YES != GNUNET_CONTAINER_multipeermap_remove_all (peer_map, key))
1738 LOG (GNUNET_ERROR_TYPE_WARNING, "removing peer from peer_map failed\n");
1740 GNUNET_free (peer_ctx);
1748 * Task run during shutdown.
1754 shutdown_task (void *cls,
1755 const struct GNUNET_SCHEDULER_TaskContext *tc)
1757 LOG (GNUNET_ERROR_TYPE_DEBUG, "RPS is going down\n");
1759 if (NULL != do_round_task)
1761 GNUNET_SCHEDULER_cancel (do_round_task);
1762 do_round_task = NULL;
1767 if (GNUNET_SYSERR ==
1768 GNUNET_CONTAINER_multipeermap_iterate (peer_map, peer_remove_cb, NULL))
1769 LOG (GNUNET_ERROR_TYPE_WARNING,
1770 "Iterating over peers to disconnect from them was cancelled\n");
1773 GNUNET_NSE_disconnect (nse);
1774 GNUNET_CADET_disconnect (cadet_handle);
1775 RPS_sampler_destroy (prot_sampler);
1776 RPS_sampler_destroy (client_sampler);
1777 LOG (GNUNET_ERROR_TYPE_DEBUG,
1778 "Size of the peermap: %u\n",
1779 GNUNET_CONTAINER_multipeermap_size (peer_map));
1780 GNUNET_break (0 == GNUNET_CONTAINER_multipeermap_size (peer_map));
1781 GNUNET_CONTAINER_multipeermap_destroy (peer_map);
1782 GNUNET_array_grow (gossip_list, gossip_list_size, 0);
1783 GNUNET_array_grow (push_list, push_list_size, 0);
1784 GNUNET_array_grow (pull_list, pull_list_size, 0);
1789 * A client disconnected. Remove all of its data structure entries.
1791 * @param cls closure, NULL
1792 * @param client identification of the client
1795 handle_client_disconnect (void *cls,
1796 struct GNUNET_SERVER_Client * client)
1802 * Handle the channel a peer opens to us.
1804 * @param cls The closure
1805 * @param channel The channel the peer wants to establish
1806 * @param initiator The peer's peer ID
1807 * @param port The port the channel is being established over
1808 * @param options Further options
1811 handle_inbound_channel (void *cls,
1812 struct GNUNET_CADET_Channel *channel,
1813 const struct GNUNET_PeerIdentity *initiator,
1815 enum GNUNET_CADET_ChannelOption options)
1817 struct PeerContext *peer_ctx;
1818 struct GNUNET_PeerIdentity peer;
1821 LOG (GNUNET_ERROR_TYPE_DEBUG,
1822 "New channel was established to us (Peer %s).\n",
1823 GNUNET_i2s (&peer));
1825 GNUNET_assert (NULL != channel);
1827 // we might not even store the recv_channel
1829 peer_ctx = get_peer_ctx (peer_map, &peer);
1830 // FIXME what do we do if a channel is established twice?
1831 // overwrite? Clean old channel? ...?
1832 //if (NULL != peer_ctx->recv_channel)
1834 // peer_ctx->recv_channel = channel;
1836 peer_ctx->recv_channel = channel;
1838 peer_ctx->mq = NULL;
1840 (void) GNUNET_CONTAINER_multipeermap_put (peer_map, &peer, peer_ctx,
1841 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
1843 peer_is_live (peer_ctx);
1845 return NULL; // TODO
1850 * This is called when a remote peer destroys a channel.
1852 * @param cls The closure
1853 * @param channel The channel being closed
1854 * @param channel_ctx The context associated with this channel
1857 cleanup_channel (void *cls,
1858 const struct GNUNET_CADET_Channel *channel,
1861 struct GNUNET_PeerIdentity *peer;
1862 struct PeerContext *peer_ctx;
1864 peer = (struct GNUNET_PeerIdentity *) GNUNET_CADET_channel_get_info (
1865 (struct GNUNET_CADET_Channel *) channel, GNUNET_CADET_OPTION_PEER);
1866 // Guess simply casting isn't the nicest way...
1867 // FIXME wait for cadet to change this function
1868 LOG (GNUNET_ERROR_TYPE_DEBUG, "Cleaning up channel to peer %s\n",
1871 if (GNUNET_YES == GNUNET_CONTAINER_multipeermap_contains (peer_map, peer))
1873 peer_ctx = GNUNET_CONTAINER_multipeermap_get (peer_map, peer);
1875 if (NULL == peer_ctx) /* It could have been removed by shutdown_task */
1878 if (channel == peer_ctx->send_channel)
1879 { /* Peer probably went down */
1880 rem_from_list (&gossip_list, &gossip_list_size, peer);
1881 rem_from_list (&pending_pull_reply_list, &pending_pull_reply_list_size, peer);
1883 /* Somwewhat {ab,re}use the iterator function */
1884 /* Cast to void is ok, because it's used as void in peer_remove_cb */
1885 (void) peer_remove_cb ((void *) channel, peer, peer_ctx);
1888 peer_ctx->recv_channel = NULL;
1894 * Actually start the service.
1897 rps_start (struct GNUNET_SERVER_Handle *server)
1899 static const struct GNUNET_SERVER_MessageHandler handlers[] = {
1900 {&handle_client_request, NULL, GNUNET_MESSAGE_TYPE_RPS_CS_REQUEST,
1901 sizeof (struct GNUNET_RPS_CS_RequestMessage)},
1902 {&handle_client_seed, NULL, GNUNET_MESSAGE_TYPE_RPS_CS_SEED, 0},
1906 GNUNET_SERVER_add_handlers (server, handlers);
1907 GNUNET_SERVER_disconnect_notify (server,
1908 &handle_client_disconnect,
1910 LOG (GNUNET_ERROR_TYPE_DEBUG, "Ready to receive requests from clients\n");
1913 do_round_task = GNUNET_SCHEDULER_add_now (&do_round, NULL);
1914 LOG (GNUNET_ERROR_TYPE_DEBUG, "Scheduled first round\n");
1916 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
1923 * Process statistics requests.
1925 * @param cls closure
1926 * @param server the initialized server
1927 * @param c configuration to use
1931 struct GNUNET_SERVER_Handle *server,
1932 const struct GNUNET_CONFIGURATION_Handle *c)
1934 // TODO check what this does -- copied from gnunet-boss
1935 // - seems to work as expected
1936 GNUNET_log_setup ("rps", GNUNET_error_type_to_string (GNUNET_ERROR_TYPE_DEBUG), NULL);
1941 GNUNET_CRYPTO_get_peer_identity (cfg, &own_identity); // TODO check return value
1942 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1943 "STARTING SERVICE (rps) for peer [%s]\n",
1944 GNUNET_i2s (&own_identity));
1947 /* Get time interval from the configuration */
1948 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_time (cfg, "RPS",
1952 LOG (GNUNET_ERROR_TYPE_DEBUG, "Failed to read ROUNDINTERVAL from config\n");
1953 GNUNET_SCHEDULER_shutdown ();
1957 /* Get initial size of sampler/gossip list from the configuration */
1958 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_number (cfg, "RPS",
1960 (long long unsigned int *) &sampler_size_est_need))
1962 LOG (GNUNET_ERROR_TYPE_DEBUG, "Failed to read INITSIZE from config\n");
1963 GNUNET_SCHEDULER_shutdown ();
1966 LOG (GNUNET_ERROR_TYPE_DEBUG, "INITSIZE is %" PRIu64 "\n", sampler_size_est_need);
1972 /* connect to NSE */
1973 nse = GNUNET_NSE_connect (cfg, nse_callback, NULL);
1974 // TODO check whether that was successful
1975 LOG (GNUNET_ERROR_TYPE_DEBUG, "Connected to NSE\n");
1981 peer_map = GNUNET_CONTAINER_multipeermap_create (sampler_size_est_need, GNUNET_NO);
1984 /* Initialise cadet */
1985 static const struct GNUNET_CADET_MessageHandler cadet_handlers[] = {
1986 {&handle_peer_push , GNUNET_MESSAGE_TYPE_RPS_PP_PUSH ,
1987 sizeof (struct GNUNET_MessageHeader)},
1988 {&handle_peer_pull_request, GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REQUEST,
1989 sizeof (struct GNUNET_MessageHeader)},
1990 {&handle_peer_pull_reply , GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REPLY , 0},
1991 #if ENABLE_MALICIOUS
1992 {&handle_peer_act_malicious, GNUNET_MESSAGE_TYPE_RPS_ACT_MALICIOUS , 0},
1993 #endif /* ENABLE_MALICIOUS */
1997 const uint32_t ports[] = {GNUNET_RPS_CADET_PORT, 0}; // _PORT specified in src/rps/rps.h
1998 cadet_handle = GNUNET_CADET_connect (cfg,
2000 &handle_inbound_channel,
2004 LOG (GNUNET_ERROR_TYPE_DEBUG, "Connected to CADET\n");
2007 /* Initialise sampler */
2008 struct GNUNET_TIME_Relative half_round_interval;
2009 struct GNUNET_TIME_Relative max_round_interval;
2011 half_round_interval = GNUNET_TIME_relative_multiply (round_interval, .5);
2012 max_round_interval = GNUNET_TIME_relative_add (round_interval, half_round_interval);
2014 prot_sampler = RPS_sampler_init (sampler_size_est_need, max_round_interval);
2015 client_sampler = RPS_sampler_init (sampler_size_est_need, max_round_interval);
2017 /* Initialise push and pull maps */
2022 pending_pull_reply_list = NULL;
2023 pending_pull_reply_list_size = 0;
2026 num_hist_update_tasks = 0;
2029 LOG (GNUNET_ERROR_TYPE_DEBUG, "Requesting peers from CADET\n");
2030 GNUNET_CADET_get_peers (cadet_handle, &init_peer_cb, NULL);
2031 // TODO send push/pull to each of those peers?
2039 * The main function for the rps service.
2041 * @param argc number of arguments from the command line
2042 * @param argv command line arguments
2043 * @return 0 ok, 1 on error
2046 main (int argc, char *const *argv)
2048 return (GNUNET_OK ==
2049 GNUNET_SERVICE_run (argc,
2052 GNUNET_SERVICE_OPTION_NONE,
2053 &run, NULL)) ? 0 : 1;
2056 /* end of gnunet-service-rps.c */