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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_peerinfo_service.h"
30 #include "gnunet_nse_service.h"
32 #include "rps-test_util.h"
33 #include "gnunet-service-rps_sampler.h"
34 #include "gnunet-service-rps_custommap.h"
35 #include "gnunet-service-rps_peers.h"
36 #include "gnunet-service-rps_view.h"
41 #define LOG(kind, ...) GNUNET_log(kind, __VA_ARGS__)
43 // TODO modify @brief in every file
45 // TODO check for overflows
47 // TODO align message structs
49 // TODO connect to friends
51 // TODO store peers somewhere persistent
53 // TODO blacklist? (-> mal peer detection on top of brahms)
55 // hist_size_init, hist_size_max
60 static const struct GNUNET_CONFIGURATION_Handle *cfg;
65 static struct GNUNET_PeerIdentity own_identity;
68 /***********************************************************************
69 * Housekeeping with clients
70 ***********************************************************************/
73 * Closure used to pass the client and the id to the callback
74 * that replies to a client's request
81 struct ReplyCls *next;
82 struct ReplyCls *prev;
85 * The identifier of the request
90 * The handle to the request
92 struct RPS_SamplerRequestHandle *req_handle;
95 * The client handle to send the reply to
97 struct GNUNET_SERVER_Client *client;
102 * Struct used to store the context of a connected client.
109 struct ClientContext *next;
110 struct ClientContext *prev;
113 * The message queue to communicate with the client.
115 struct GNUNET_MQ_Handle *mq;
118 * DLL with handles to single requests from the client
120 struct ReplyCls *rep_cls_head;
121 struct ReplyCls *rep_cls_tail;
125 * DLL with all clients currently connected to us
127 struct ClientContext *cli_ctx_head;
128 struct ClientContext *cli_ctx_tail;
130 /***********************************************************************
131 * /Housekeeping with clients
132 ***********************************************************************/
138 /***********************************************************************
140 ***********************************************************************/
143 * Sampler used for the Brahms protocol itself.
145 static struct RPS_Sampler *prot_sampler;
148 * Sampler used for the clients.
150 static struct RPS_Sampler *client_sampler;
153 * Name to log view to
155 static char *file_name_view_log;
158 * The size of sampler we need to be able to satisfy the client's need
161 static unsigned int sampler_size_client_need;
164 * The size of sampler we need to be able to satisfy the Brahms protocol's
165 * need of random peers.
167 * This is one minimum size the sampler grows to.
169 static unsigned int sampler_size_est_need;
172 * Percentage of total peer number in the view
173 * to send random PUSHes to
178 * Percentage of total peer number in the view
179 * to send random PULLs to
184 * Identifier for the main task that runs periodically.
186 static struct GNUNET_SCHEDULER_Task *do_round_task;
189 * Time inverval the do_round task runs in.
191 static struct GNUNET_TIME_Relative round_interval;
194 * List to store peers received through pushes temporary.
196 static struct CustomPeerMap *push_map;
199 * List to store peers received through pulls temporary.
201 static struct CustomPeerMap *pull_map;
206 static struct GNUNET_NSE_Handle *nse;
211 static struct GNUNET_CADET_Handle *cadet_handle;
214 * Handler to PEERINFO.
216 static struct GNUNET_PEERINFO_Handle *peerinfo_handle;
219 * Handle for cancellation of iteration over peers.
221 static struct GNUNET_PEERINFO_NotifyContext *peerinfo_notify_handle;
226 * Counts how many requets clients already issued.
227 * Only needed in the beginning to check how many of the 64 deltas
230 static unsigned int req_counter;
233 * Time of the last request we received.
235 * Used to compute the expected request rate.
237 static struct GNUNET_TIME_Absolute last_request;
240 * Size of #request_deltas.
242 #define REQUEST_DELTAS_SIZE 64
243 static unsigned int request_deltas_size = REQUEST_DELTAS_SIZE;
246 * Last 64 deltas between requests
248 static struct GNUNET_TIME_Relative request_deltas[REQUEST_DELTAS_SIZE];
251 * The prediction of the rate of requests
253 static struct GNUNET_TIME_Relative request_rate;
256 #ifdef ENABLE_MALICIOUS
258 * Type of malicious peer
260 * 0 Don't act malicious at all - Default
261 * 1 Try to maximise representation
262 * 2 Try to partition the network
265 static uint32_t mal_type;
268 * Other malicious peers
270 static struct GNUNET_PeerIdentity *mal_peers;
273 * Hashmap of malicious peers used as set.
274 * Used to more efficiently check whether we know that peer.
276 static struct GNUNET_CONTAINER_MultiPeerMap *mal_peer_set;
279 * Number of other malicious peers
281 static uint32_t num_mal_peers;
285 * If type is 2 This struct is used to store the attacked peers in a DLL
292 struct AttackedPeer *next;
293 struct AttackedPeer *prev;
298 struct GNUNET_PeerIdentity peer_id;
302 * If type is 2 this is the DLL of attacked peers
304 static struct AttackedPeer *att_peers_head;
305 static struct AttackedPeer *att_peers_tail;
308 * This index is used to point to an attacked peer to
309 * implement the round-robin-ish way to select attacked peers.
311 static struct AttackedPeer *att_peer_index;
314 * Hashmap of attacked peers used as set.
315 * Used to more efficiently check whether we know that peer.
317 static struct GNUNET_CONTAINER_MultiPeerMap *att_peer_set;
320 * Number of attacked peers
322 static uint32_t num_attacked_peers;
325 * If type is 1 this is the attacked peer
327 static struct GNUNET_PeerIdentity attacked_peer;
330 * The limit of PUSHes we can send in one round.
331 * This is an assumption of the Brahms protocol and either implemented
334 * assumend to be the bandwidth limitation.
336 static uint32_t push_limit = 10000;
337 #endif /* ENABLE_MALICIOUS */
340 /***********************************************************************
342 ***********************************************************************/
345 /***********************************************************************
347 ***********************************************************************/
351 * Print peerlist to log.
354 print_peer_list (struct GNUNET_PeerIdentity *list,
359 LOG (GNUNET_ERROR_TYPE_DEBUG,
360 "Printing peer list of length %u at %p:\n",
363 for (i = 0 ; i < len ; i++)
365 LOG (GNUNET_ERROR_TYPE_DEBUG,
367 i, GNUNET_i2s (&list[i]));
373 * Remove peer from list.
376 rem_from_list (struct GNUNET_PeerIdentity **peer_list,
377 unsigned int *list_size,
378 const struct GNUNET_PeerIdentity *peer)
381 struct GNUNET_PeerIdentity *tmp;
385 LOG (GNUNET_ERROR_TYPE_DEBUG,
386 "Removing peer %s from list at %p\n",
390 for ( i = 0 ; i < *list_size ; i++ )
392 if (0 == GNUNET_CRYPTO_cmp_peer_identity (&tmp[i], peer))
394 if (i < *list_size -1)
395 { /* Not at the last entry -- shift peers left */
396 memcpy (&tmp[i], &tmp[i +1],
397 ((*list_size) - i -1) * sizeof (struct GNUNET_PeerIdentity));
399 /* Remove last entry (should be now useless PeerID) */
400 GNUNET_array_grow (tmp, *list_size, (*list_size) -1);
408 * Sum all time relatives of an array.
410 static struct GNUNET_TIME_Relative
411 T_relative_sum (const struct GNUNET_TIME_Relative *rel_array,
414 struct GNUNET_TIME_Relative sum;
417 sum = GNUNET_TIME_UNIT_ZERO;
418 for ( i = 0 ; i < arr_size ; i++ )
420 sum = GNUNET_TIME_relative_add (sum, rel_array[i]);
427 * Compute the average of given time relatives.
429 static struct GNUNET_TIME_Relative
430 T_relative_avg (const struct GNUNET_TIME_Relative *rel_array,
433 return GNUNET_TIME_relative_divide (T_relative_sum (rel_array,
440 * Insert PeerID in #view
442 * Called once we know a peer is live.
445 * @return GNUNET_OK if peer was actually inserted
446 * GNUNET_NO if peer was not inserted
449 insert_in_view_op (void *cls,
450 const struct GNUNET_PeerIdentity *peer);
453 * Insert PeerID in #view
455 * Called once we know a peer is live.
457 * @return GNUNET_OK if peer was actually inserted
458 * GNUNET_NO if peer was not inserted
461 insert_in_view (const struct GNUNET_PeerIdentity *peer)
465 online = Peers_check_peer_flag (peer, Peers_ONLINE);
466 if ( (GNUNET_NO == online) ||
467 (GNUNET_SYSERR == online) ) /* peer is not even known */
469 (void) Peers_issue_peer_liveliness_check (peer);
470 (void) Peers_schedule_operation (peer, insert_in_view_op);
473 /* Open channel towards peer to keep connection open */
474 Peers_indicate_sending_intention (peer);
475 return View_put (peer);
479 * Put random peer from sampler into the view as history update.
482 hist_update (void *cls,
483 struct GNUNET_PeerIdentity *ids,
488 for (i = 0; i < num_peers; i++)
490 (void) insert_in_view (&ids[i]);
491 to_file (file_name_view_log,
493 GNUNET_i2s_full (ids));
499 * Wrapper around #RPS_sampler_resize()
501 * If we do not have enough sampler elements, double current sampler size
502 * If we have more than enough sampler elements, halv current sampler size
505 resize_wrapper (struct RPS_Sampler *sampler, uint32_t new_size)
507 unsigned int sampler_size;
510 // TODO respect the min, max
511 sampler_size = RPS_sampler_get_size (sampler);
512 if (sampler_size > new_size * 4)
514 RPS_sampler_resize (sampler, sampler_size / 2);
516 else if (sampler_size < new_size)
518 RPS_sampler_resize (sampler, sampler_size * 2);
520 LOG (GNUNET_ERROR_TYPE_DEBUG, "sampler_size is now %u\n", sampler_size);
525 * Wrapper around #RPS_sampler_resize() resizing the client sampler
528 client_resize_wrapper ()
530 uint32_t bigger_size;
534 bigger_size = GNUNET_MAX (sampler_size_est_need, sampler_size_client_need);
536 // TODO respect the min, max
537 resize_wrapper (client_sampler, bigger_size);
538 LOG (GNUNET_ERROR_TYPE_DEBUG, "sampler_size_client is now %" PRIu32 "\n",
544 * Estimate request rate
546 * Called every time we receive a request from the client.
551 struct GNUNET_TIME_Relative max_round_duration;
553 if (request_deltas_size > req_counter)
555 if ( 1 < req_counter)
557 /* Shift last request deltas to the right */
558 memcpy (&request_deltas[1],
560 (req_counter - 1) * sizeof (struct GNUNET_TIME_Relative));
562 /* Add current delta to beginning */
564 GNUNET_TIME_absolute_get_difference (last_request,
565 GNUNET_TIME_absolute_get ());
566 request_rate = T_relative_avg (request_deltas, req_counter);
567 request_rate = (request_rate.rel_value_us < 1) ?
568 GNUNET_TIME_relative_get_unit_ () : request_rate;
570 /* Compute the duration a round will maximally take */
572 GNUNET_TIME_relative_add (round_interval,
573 GNUNET_TIME_relative_divide (round_interval, 2));
575 /* Set the estimated size the sampler has to have to
576 * satisfy the current client request rate */
577 sampler_size_client_need =
578 max_round_duration.rel_value_us / request_rate.rel_value_us;
580 /* Resize the sampler */
581 client_resize_wrapper ();
583 last_request = GNUNET_TIME_absolute_get ();
588 * Add all peers in @a peer_array to @a peer_map used as set.
590 * @param peer_array array containing the peers
591 * @param num_peers number of peers in @peer_array
592 * @param peer_map the peermap to use as set
595 add_peer_array_to_set (const struct GNUNET_PeerIdentity *peer_array,
596 unsigned int num_peers,
597 struct GNUNET_CONTAINER_MultiPeerMap *peer_map)
600 if (NULL == peer_map)
602 LOG (GNUNET_ERROR_TYPE_WARNING,
603 "Trying to add peers to non-existing peermap.\n");
607 for (i = 0; i < num_peers; i++)
609 GNUNET_CONTAINER_multipeermap_put (peer_map,
612 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
618 * Send a PULL REPLY to @a peer_id
620 * @param peer_id the peer to send the reply to.
621 * @param peer_ids the peers to send to @a peer_id
622 * @param num_peer_ids the number of peers to send to @a peer_id
625 send_pull_reply (const struct GNUNET_PeerIdentity *peer_id,
626 const struct GNUNET_PeerIdentity *peer_ids,
627 unsigned int num_peer_ids)
630 struct GNUNET_MQ_Envelope *ev;
631 struct GNUNET_RPS_P2P_PullReplyMessage *out_msg;
633 /* Compute actual size */
634 send_size = sizeof (struct GNUNET_RPS_P2P_PullReplyMessage) +
635 num_peer_ids * sizeof (struct GNUNET_PeerIdentity);
637 if (GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE < send_size)
638 /* Compute number of peers to send
639 * If too long, simply truncate */
640 // TODO select random ones via permutation
641 // or even better: do good protocol design
643 (GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE -
644 sizeof (struct GNUNET_RPS_P2P_PullReplyMessage)) /
645 sizeof (struct GNUNET_PeerIdentity);
647 send_size = num_peer_ids;
649 LOG (GNUNET_ERROR_TYPE_DEBUG,
650 "Going to send PULL REPLY with %u peers to %s\n",
651 send_size, GNUNET_i2s (peer_id));
653 ev = GNUNET_MQ_msg_extra (out_msg,
654 send_size * sizeof (struct GNUNET_PeerIdentity),
655 GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REPLY);
656 out_msg->num_peers = htonl (send_size);
657 memcpy (&out_msg[1], peer_ids,
658 send_size * sizeof (struct GNUNET_PeerIdentity));
660 Peers_send_message (peer_id, ev, "PULL REPLY");
665 * Insert PeerID in #pull_map
667 * Called once we know a peer is live.
670 insert_in_pull_map (void *cls,
671 const struct GNUNET_PeerIdentity *peer)
673 CustomPeerMap_put (pull_map, peer);
678 * Insert PeerID in #view
680 * Called once we know a peer is live.
684 insert_in_view_op (void *cls,
685 const struct GNUNET_PeerIdentity *peer)
687 (void) insert_in_view (peer);
692 * Update sampler with given PeerID.
696 insert_in_sampler (void *cls,
697 const struct GNUNET_PeerIdentity *peer)
699 LOG (GNUNET_ERROR_TYPE_DEBUG,
700 "Updating samplers with peer %s from insert_in_sampler()\n",
702 RPS_sampler_update (prot_sampler, peer);
703 RPS_sampler_update (client_sampler, peer);
704 if (0 < RPS_sampler_count_id (prot_sampler, peer))
706 /* Make sure we 'know' about this peer */
707 (void) Peers_issue_peer_liveliness_check (peer);
708 /* Establish a channel towards that peer to indicate we are going to send
710 //Peers_indicate_sending_intention (peer);
715 * @brief If @a peer was unknown, check liveliness and insert it in view and
718 * @param peer peer to insert
721 got_peer (const struct GNUNET_PeerIdentity *peer)
723 /* If we did not know this peer already, insert it into sampler and view */
724 if (GNUNET_YES == Peers_issue_peer_liveliness_check (peer))
726 Peers_schedule_operation (peer, insert_in_sampler);
727 Peers_schedule_operation (peer, insert_in_view_op);
732 * @brief Checks if there is a sending channel and if it is needed
734 * @param peer the peer whose sending channel is checked
735 * @return GNUNET_YES if sending channel exists and is still needed
736 * GNUNET_NO otherwise
739 check_sending_channel_needed (const struct GNUNET_PeerIdentity *peer)
741 /* struct GNUNET_CADET_Channel *channel; */
742 if (GNUNET_NO == Peers_check_peer_known (peer))
746 if (GNUNET_YES == Peers_check_sending_channel_exists (peer))
748 if ( (0 < RPS_sampler_count_id (prot_sampler, peer)) ||
749 (GNUNET_YES == View_contains_peer (peer)) ||
750 (GNUNET_YES == CustomPeerMap_contains_peer (push_map, peer)) ||
751 (GNUNET_YES == CustomPeerMap_contains_peer (pull_map, peer)) ||
752 (GNUNET_YES == Peers_check_peer_flag (peer, Peers_PULL_REPLY_PENDING)))
753 { /* If we want to keep the connection to peer open */
762 * @brief remove peer from our knowledge, the view, push and pull maps and
765 * @param peer the peer to remove
768 remove_peer (const struct GNUNET_PeerIdentity *peer)
770 View_remove_peer (peer);
771 CustomPeerMap_remove_peer (pull_map, peer);
772 CustomPeerMap_remove_peer (push_map, peer);
773 RPS_sampler_reinitialise_by_value (prot_sampler, peer);
774 RPS_sampler_reinitialise_by_value (client_sampler, peer);
775 Peers_remove_peer (peer);
780 * @brief Remove data that is not needed anymore.
782 * If the sending channel is no longer needed it is destroyed.
784 * @param peer the peer whose data is about to be cleaned
787 clean_peer (const struct GNUNET_PeerIdentity *peer)
789 if (GNUNET_NO == check_sending_channel_needed (peer))
791 #ifdef ENABLE_MALICIOUS
792 if (0 != GNUNET_CRYPTO_cmp_peer_identity (&attacked_peer, peer))
793 Peers_destroy_sending_channel (peer);
794 #else /* ENABLE_MALICIOUS */
795 Peers_destroy_sending_channel (peer);
796 #endif /* ENABLE_MALICIOUS */
799 if ( (GNUNET_NO == Peers_check_peer_send_intention (peer)) &&
800 (GNUNET_NO == View_contains_peer (peer)) &&
801 (GNUNET_NO == CustomPeerMap_contains_peer (push_map, peer)) &&
802 (GNUNET_NO == CustomPeerMap_contains_peer (push_map, peer)) &&
803 (0 == RPS_sampler_count_id (prot_sampler, peer)) &&
804 (0 == RPS_sampler_count_id (client_sampler, peer)) )
805 { /* We can safely remov this peer */
809 Peers_clean_peer (peer);
813 * @brief This is called when a channel is destroyed.
815 * Removes peer completely from our knowledge if the send_channel was destroyed
816 * Otherwise simply delete the recv_channel
818 * @param cls The closure
819 * @param channel The channel being closed
820 * @param channel_ctx The context associated with this channel
823 cleanup_destroyed_channel (void *cls,
824 const struct GNUNET_CADET_Channel *channel,
827 struct GNUNET_PeerIdentity *peer;
829 peer = (struct GNUNET_PeerIdentity *) GNUNET_CADET_channel_get_info (
830 (struct GNUNET_CADET_Channel *) channel, GNUNET_CADET_OPTION_PEER);
831 // FIXME wait for cadet to change this function
833 if (GNUNET_NO == Peers_check_peer_known (peer))
834 { /* We don't know a context to that peer */
835 LOG (GNUNET_ERROR_TYPE_WARNING,
836 "channel (%s) without associated context was destroyed\n",
841 if (GNUNET_YES == Peers_check_peer_flag (peer, Peers_TO_DESTROY))
842 { /* We are in the middle of removing that peer from our knowledge. In this
843 case simply make sure that the channels are cleaned. */
844 Peers_cleanup_destroyed_channel (cls, channel, channel_ctx);
845 to_file (file_name_view_log,
846 "-%s\t(cleanup channel, ourself)",
847 GNUNET_i2s_full (peer));
852 Peers_check_channel_role (peer, channel, Peers_CHANNEL_ROLE_SENDING))
853 { /* Channel used for sending was destroyed */
854 /* Possible causes of channel destruction:
855 * - ourselves -> cleaning send channel -> clean context
856 * - other peer -> peer probably went down -> remove
858 if (GNUNET_YES == Peers_check_channel_flag (channel_ctx, Peers_CHANNEL_CLEAN))
859 { /* We are about to clean the sending channel. Clean the respective
861 Peers_cleanup_destroyed_channel (cls, channel, channel_ctx);
865 { /* Other peer destroyed our sending channel that he is supposed to keep
866 * open. It probably went down. Remove it from our knowledge. */
867 Peers_cleanup_destroyed_channel (cls, channel, channel_ctx);
872 else if (GNUNET_YES ==
873 Peers_check_channel_role (peer, channel, Peers_CHANNEL_ROLE_RECEIVING))
874 { /* Channel used for receiving was destroyed */
875 /* Possible causes of channel destruction:
876 * - ourselves -> peer tried to establish channel twice -> clean context
877 * - other peer -> peer doesn't want to send us data -> clean
880 Peers_check_channel_flag (channel_ctx, Peers_CHANNEL_ESTABLISHED_TWICE))
881 { /* Other peer tried to establish a channel to us twice. We do not accept
882 * that. Clean the context. */
883 Peers_cleanup_destroyed_channel (cls, channel, channel_ctx);
887 { /* Other peer doesn't want to send us data anymore. We are free to clean
889 Peers_cleanup_destroyed_channel (cls, channel, channel_ctx);
896 LOG (GNUNET_ERROR_TYPE_WARNING,
897 "Destroyed channel is neither sending nor receiving channel\n");
901 /***********************************************************************
903 ***********************************************************************/
906 destroy_reply_cls (struct ReplyCls *rep_cls)
908 struct ClientContext *cli_ctx;
910 cli_ctx = GNUNET_SERVER_client_get_user_context (rep_cls->client,
911 struct ClientContext);
912 GNUNET_assert (NULL != cli_ctx);
913 GNUNET_CONTAINER_DLL_remove (cli_ctx->rep_cls_head,
914 cli_ctx->rep_cls_tail,
916 GNUNET_free (rep_cls);
921 destroy_cli_ctx (struct ClientContext *cli_ctx)
923 GNUNET_assert (NULL != cli_ctx);
924 if (NULL != cli_ctx->mq)
926 GNUNET_MQ_destroy (cli_ctx->mq);
928 if (NULL != cli_ctx->rep_cls_head)
930 LOG (GNUNET_ERROR_TYPE_WARNING,
931 "Trying to destroy the context of a client that still has pending requests. Going to clean those\n");
932 while (NULL != cli_ctx->rep_cls_head)
933 destroy_reply_cls (cli_ctx->rep_cls_head);
935 GNUNET_CONTAINER_DLL_remove (cli_ctx_head,
938 GNUNET_free (cli_ctx);
943 * Function called by NSE.
945 * Updates sizes of sampler list and view and adapt those lists
949 nse_callback (void *cls,
950 struct GNUNET_TIME_Absolute timestamp,
951 double logestimate, double std_dev)
954 //double scale; // TODO this might go gloabal/config
956 LOG (GNUNET_ERROR_TYPE_DEBUG,
957 "Received a ns estimate - logest: %f, std_dev: %f (old_size: %u)\n",
958 logestimate, std_dev, RPS_sampler_get_size (prot_sampler));
960 estimate = GNUNET_NSE_log_estimate_to_n (logestimate);
961 // GNUNET_NSE_log_estimate_to_n (logestimate);
962 estimate = pow (estimate, 1.0 / 3);
963 // TODO add if std_dev is a number
964 // estimate += (std_dev * scale);
965 if (2 < ceil (estimate))
967 LOG (GNUNET_ERROR_TYPE_DEBUG, "Changing estimate to %f\n", estimate);
968 sampler_size_est_need = estimate;
970 LOG (GNUNET_ERROR_TYPE_DEBUG, "Not using estimate %f\n", estimate);
972 /* If the NSE has changed adapt the lists accordingly */
973 resize_wrapper (prot_sampler, sampler_size_est_need);
974 client_resize_wrapper ();
979 * Callback called once the requested PeerIDs are ready.
981 * Sends those to the requesting client.
984 client_respond (void *cls,
985 struct GNUNET_PeerIdentity *peer_ids,
989 struct GNUNET_MQ_Envelope *ev;
990 struct GNUNET_RPS_CS_ReplyMessage *out_msg;
991 struct ReplyCls *reply_cls = (struct ReplyCls *) cls;
992 uint32_t size_needed;
993 struct ClientContext *cli_ctx;
995 GNUNET_assert (NULL != reply_cls);
996 LOG (GNUNET_ERROR_TYPE_DEBUG,
997 "sampler returned %" PRIu32 " peers:\n",
999 for (i = 0; i < num_peers; i++)
1001 LOG (GNUNET_ERROR_TYPE_DEBUG,
1002 " %" PRIu32 ": %s\n",
1004 GNUNET_i2s (&peer_ids[i]));
1007 size_needed = sizeof (struct GNUNET_RPS_CS_ReplyMessage) +
1008 num_peers * sizeof (struct GNUNET_PeerIdentity);
1010 GNUNET_assert (GNUNET_SERVER_MAX_MESSAGE_SIZE >= size_needed);
1012 ev = GNUNET_MQ_msg_extra (out_msg,
1013 num_peers * sizeof (struct GNUNET_PeerIdentity),
1014 GNUNET_MESSAGE_TYPE_RPS_CS_REPLY);
1015 out_msg->num_peers = htonl (num_peers);
1016 out_msg->id = htonl (reply_cls->id);
1018 memcpy (&out_msg[1],
1020 num_peers * sizeof (struct GNUNET_PeerIdentity));
1021 GNUNET_free (peer_ids);
1023 cli_ctx = GNUNET_SERVER_client_get_user_context (reply_cls->client,
1024 struct ClientContext);
1025 GNUNET_assert (NULL != cli_ctx);
1026 destroy_reply_cls (reply_cls);
1027 GNUNET_MQ_send (cli_ctx->mq, ev);
1032 * Handle RPS request from the client.
1034 * @param cls closure
1035 * @param client identification of the client
1036 * @param message the actual message
1039 handle_client_request (void *cls,
1040 struct GNUNET_SERVER_Client *client,
1041 const struct GNUNET_MessageHeader *message)
1043 struct GNUNET_RPS_CS_RequestMessage *msg;
1045 uint32_t size_needed;
1046 struct ReplyCls *reply_cls;
1048 struct ClientContext *cli_ctx;
1050 msg = (struct GNUNET_RPS_CS_RequestMessage *) message;
1052 num_peers = ntohl (msg->num_peers);
1053 size_needed = sizeof (struct GNUNET_RPS_CS_RequestMessage) +
1054 num_peers * sizeof (struct GNUNET_PeerIdentity);
1056 if (GNUNET_SERVER_MAX_MESSAGE_SIZE < size_needed)
1058 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1059 "Message received from client has size larger than expected\n");
1060 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
1064 for (i = 0 ; i < num_peers ; i++)
1067 LOG (GNUNET_ERROR_TYPE_DEBUG,
1068 "Client requested %" PRIu32 " random peer(s).\n",
1071 reply_cls = GNUNET_new (struct ReplyCls);
1072 reply_cls->id = ntohl (msg->id);
1073 reply_cls->client = client;
1074 reply_cls->req_handle = RPS_sampler_get_n_rand_peers (client_sampler,
1079 cli_ctx = GNUNET_SERVER_client_get_user_context (client, struct ClientContext);
1080 GNUNET_assert (NULL != cli_ctx);
1081 GNUNET_CONTAINER_DLL_insert (cli_ctx->rep_cls_head,
1082 cli_ctx->rep_cls_tail,
1084 GNUNET_SERVER_receive_done (client,
1090 * @brief Handle a message that requests the cancellation of a request
1093 * @param client the client that requests the cancellation
1094 * @param message the message containing the id of the request
1097 handle_client_request_cancel (void *cls,
1098 struct GNUNET_SERVER_Client *client,
1099 const struct GNUNET_MessageHeader *message)
1101 struct GNUNET_RPS_CS_RequestCancelMessage *msg =
1102 (struct GNUNET_RPS_CS_RequestCancelMessage *) message;
1103 struct ClientContext *cli_ctx;
1104 struct ReplyCls *rep_cls;
1106 cli_ctx = GNUNET_SERVER_client_get_user_context (client, struct ClientContext);
1107 GNUNET_assert (NULL != cli_ctx->rep_cls_head);
1108 rep_cls = cli_ctx->rep_cls_head;
1109 LOG (GNUNET_ERROR_TYPE_DEBUG,
1110 "Client cancels request with id %" PRIu32 "\n",
1112 while ( (NULL != rep_cls->next) &&
1113 (rep_cls->id != ntohl (msg->id)) )
1114 rep_cls = rep_cls->next;
1115 GNUNET_assert (rep_cls->id == ntohl (msg->id));
1116 RPS_sampler_request_cancel (rep_cls->req_handle);
1117 destroy_reply_cls (rep_cls);
1118 GNUNET_SERVER_receive_done (client,
1124 * Handle seed from the client.
1126 * @param cls closure
1127 * @param client identification of the client
1128 * @param message the actual message
1131 handle_client_seed (void *cls,
1132 struct GNUNET_SERVER_Client *client,
1133 const struct GNUNET_MessageHeader *message)
1135 struct GNUNET_RPS_CS_SeedMessage *in_msg;
1136 struct GNUNET_PeerIdentity *peers;
1140 if (sizeof (struct GNUNET_RPS_CS_SeedMessage) > ntohs (message->size))
1142 GNUNET_break_op (0);
1143 GNUNET_SERVER_receive_done (client,
1147 in_msg = (struct GNUNET_RPS_CS_SeedMessage *) message;
1148 num_peers = ntohl (in_msg->num_peers);
1149 peers = (struct GNUNET_PeerIdentity *) &in_msg[1];
1150 //peers = GNUNET_new_array (num_peers, struct GNUNET_PeerIdentity);
1151 //memcpy (peers, &in_msg[1], num_peers * sizeof (struct GNUNET_PeerIdentity));
1153 if ((ntohs (message->size) - sizeof (struct GNUNET_RPS_CS_SeedMessage)) /
1154 sizeof (struct GNUNET_PeerIdentity) != num_peers)
1156 GNUNET_break_op (0);
1157 GNUNET_SERVER_receive_done (client,
1162 LOG (GNUNET_ERROR_TYPE_DEBUG,
1163 "Client seeded peers:\n");
1164 print_peer_list (peers, num_peers);
1166 for (i = 0; i < num_peers; i++)
1168 LOG (GNUNET_ERROR_TYPE_DEBUG,
1169 "Updating samplers with seed %" PRIu32 ": %s\n",
1171 GNUNET_i2s (&peers[i]));
1173 got_peer (&peers[i]);
1175 //RPS_sampler_update (prot_sampler, &peers[i]);
1176 //RPS_sampler_update (client_sampler, &peers[i]);
1179 ////GNUNET_free (peers);
1181 GNUNET_SERVER_receive_done (client,
1187 * Handle a PUSH message from another peer.
1189 * Check the proof of work and store the PeerID
1190 * in the temporary list for pushed PeerIDs.
1192 * @param cls Closure
1193 * @param channel The channel the PUSH was received over
1194 * @param channel_ctx The context associated with this channel
1195 * @param msg The message header
1198 handle_peer_push (void *cls,
1199 struct GNUNET_CADET_Channel *channel,
1201 const struct GNUNET_MessageHeader *msg)
1203 const struct GNUNET_PeerIdentity *peer;
1205 // (check the proof of work (?))
1207 peer = (const struct GNUNET_PeerIdentity *)
1208 GNUNET_CADET_channel_get_info (channel, GNUNET_CADET_OPTION_PEER);
1209 // FIXME wait for cadet to change this function
1211 LOG (GNUNET_ERROR_TYPE_DEBUG,
1212 "Received PUSH (%s)\n",
1215 #ifdef ENABLE_MALICIOUS
1216 struct AttackedPeer *tmp_att_peer;
1218 tmp_att_peer = GNUNET_new (struct AttackedPeer);
1219 memcpy (&tmp_att_peer->peer_id, peer, sizeof (struct GNUNET_PeerIdentity));
1222 { /* Try to maximise representation */
1223 if (NULL == att_peer_set)
1224 att_peer_set = GNUNET_CONTAINER_multipeermap_create (1, GNUNET_NO);
1225 if (GNUNET_NO == GNUNET_CONTAINER_multipeermap_contains (att_peer_set,
1228 GNUNET_CONTAINER_DLL_insert (att_peers_head,
1231 add_peer_array_to_set (peer, 1, att_peer_set);
1237 else if (2 == mal_type)
1238 { /* We attack one single well-known peer - simply ignore */
1243 GNUNET_free (tmp_att_peer);
1246 #endif /* ENABLE_MALICIOUS */
1248 /* Add the sending peer to the push_map */
1249 CustomPeerMap_put (push_map, peer);
1251 GNUNET_CADET_receive_done (channel);
1257 * Handle PULL REQUEST request message from another peer.
1259 * Reply with the view of PeerIDs.
1261 * @param cls Closure
1262 * @param channel The channel the PULL REQUEST was received over
1263 * @param channel_ctx The context associated with this channel
1264 * @param msg The message header
1267 handle_peer_pull_request (void *cls,
1268 struct GNUNET_CADET_Channel *channel,
1270 const struct GNUNET_MessageHeader *msg)
1272 struct GNUNET_PeerIdentity *peer;
1273 const struct GNUNET_PeerIdentity *view_array;
1275 peer = (struct GNUNET_PeerIdentity *)
1276 GNUNET_CADET_channel_get_info (channel,
1277 GNUNET_CADET_OPTION_PEER);
1278 // FIXME wait for cadet to change this function
1280 LOG (GNUNET_ERROR_TYPE_DEBUG, "Received PULL REQUEST (%s)\n", GNUNET_i2s (peer));
1282 #ifdef ENABLE_MALICIOUS
1285 { /* Try to maximise representation */
1286 send_pull_reply (peer, mal_peers, num_mal_peers);
1290 else if (2 == mal_type)
1291 { /* Try to partition network */
1292 if (0 == GNUNET_CRYPTO_cmp_peer_identity (&attacked_peer, peer))
1294 send_pull_reply (peer, mal_peers, num_mal_peers);
1298 #endif /* ENABLE_MALICIOUS */
1300 view_array = View_get_as_array ();
1302 send_pull_reply (peer, view_array, View_size ());
1304 GNUNET_CADET_receive_done (channel);
1310 * Handle PULL REPLY message from another peer.
1312 * Check whether we sent a corresponding request and
1313 * whether this reply is the first one.
1315 * @param cls Closure
1316 * @param channel The channel the PUSH was received over
1317 * @param channel_ctx The context associated with this channel
1318 * @param msg The message header
1321 handle_peer_pull_reply (void *cls,
1322 struct GNUNET_CADET_Channel *channel,
1324 const struct GNUNET_MessageHeader *msg)
1326 struct GNUNET_RPS_P2P_PullReplyMessage *in_msg;
1327 struct GNUNET_PeerIdentity *peers;
1328 struct GNUNET_PeerIdentity *sender;
1330 #ifdef ENABLE_MALICIOUS
1331 struct AttackedPeer *tmp_att_peer;
1332 #endif /* ENABLE_MALICIOUS */
1334 /* Check for protocol violation */
1335 if (sizeof (struct GNUNET_RPS_P2P_PullReplyMessage) > ntohs (msg->size))
1337 GNUNET_break_op (0);
1338 GNUNET_CADET_receive_done (channel);
1339 return GNUNET_SYSERR;
1342 in_msg = (struct GNUNET_RPS_P2P_PullReplyMessage *) msg;
1343 if ((ntohs (msg->size) - sizeof (struct GNUNET_RPS_P2P_PullReplyMessage)) /
1344 sizeof (struct GNUNET_PeerIdentity) != ntohl (in_msg->num_peers))
1346 LOG (GNUNET_ERROR_TYPE_ERROR,
1347 "message says it sends %" PRIu32 " peers, have space for %lu peers\n",
1348 ntohl (in_msg->num_peers),
1349 (ntohs (msg->size) - sizeof (struct GNUNET_RPS_P2P_PullReplyMessage)) /
1350 sizeof (struct GNUNET_PeerIdentity));
1351 GNUNET_break_op (0);
1352 GNUNET_CADET_receive_done (channel);
1353 return GNUNET_SYSERR;
1356 // Guess simply casting isn't the nicest way...
1357 // FIXME wait for cadet to change this function
1358 sender = (struct GNUNET_PeerIdentity *)
1359 GNUNET_CADET_channel_get_info (channel, GNUNET_CADET_OPTION_PEER);
1361 LOG (GNUNET_ERROR_TYPE_DEBUG, "Received PULL REPLY (%s)\n", GNUNET_i2s (sender));
1363 if (GNUNET_YES != Peers_check_peer_flag (sender, Peers_PULL_REPLY_PENDING))
1365 LOG (GNUNET_ERROR_TYPE_WARNING,
1366 "Received a pull reply from a peer we didn't request one from!\n");
1367 GNUNET_break_op (0);
1368 GNUNET_CADET_receive_done (channel);
1373 #ifdef ENABLE_MALICIOUS
1374 // We shouldn't even receive pull replies as we're not sending
1377 #endif /* ENABLE_MALICIOUS */
1379 /* Do actual logic */
1380 peers = (struct GNUNET_PeerIdentity *) &in_msg[1];
1382 LOG (GNUNET_ERROR_TYPE_DEBUG,
1383 "PULL REPLY received, got following %u peers:\n",
1384 ntohl (in_msg->num_peers));
1386 for (i = 0 ; i < ntohl (in_msg->num_peers) ; i++)
1388 LOG (GNUNET_ERROR_TYPE_DEBUG,
1391 GNUNET_i2s (&peers[i]));
1393 #ifdef ENABLE_MALICIOUS
1394 if ((NULL != att_peer_set) &&
1395 (1 == mal_type || 3 == mal_type))
1396 { /* Add attacked peer to local list */
1397 // TODO check if we sent a request and this was the first reply
1398 if (GNUNET_NO == GNUNET_CONTAINER_multipeermap_contains (att_peer_set,
1400 && GNUNET_NO == GNUNET_CONTAINER_multipeermap_contains (mal_peer_set,
1402 && 0 != GNUNET_CRYPTO_cmp_peer_identity (&peers[i],
1405 tmp_att_peer = GNUNET_new (struct AttackedPeer);
1406 tmp_att_peer->peer_id = peers[i];
1407 GNUNET_CONTAINER_DLL_insert (att_peers_head,
1410 add_peer_array_to_set (&peers[i], 1, att_peer_set);
1414 #endif /* ENABLE_MALICIOUS */
1415 if (0 != GNUNET_CRYPTO_cmp_peer_identity (&own_identity,
1418 /* Make sure we 'know' about this peer */
1419 (void) Peers_insert_peer (&peers[i]);
1421 if (GNUNET_YES == Peers_check_peer_valid (&peers[i]))
1423 CustomPeerMap_put (pull_map, &peers[i]);
1427 Peers_schedule_operation (&peers[i], insert_in_pull_map);
1428 (void) Peers_issue_peer_liveliness_check (&peers[i]);
1433 Peers_unset_peer_flag (sender, Peers_PULL_REPLY_PENDING);
1434 clean_peer (sender);
1436 GNUNET_CADET_receive_done (channel);
1442 * Compute a random delay.
1443 * A uniformly distributed value between mean + spread and mean - spread.
1445 * For example for mean 4 min and spread 2 the minimum is (4 min - (1/2 * 4 min))
1446 * It would return a random value between 2 and 6 min.
1448 * @param mean the mean
1449 * @param spread the inverse amount of deviation from the mean
1451 static struct GNUNET_TIME_Relative
1452 compute_rand_delay (struct GNUNET_TIME_Relative mean,
1453 unsigned int spread)
1455 struct GNUNET_TIME_Relative half_interval;
1456 struct GNUNET_TIME_Relative ret;
1457 unsigned int rand_delay;
1458 unsigned int max_rand_delay;
1462 LOG (GNUNET_ERROR_TYPE_WARNING,
1463 "Not accepting spread of 0\n");
1467 /* Compute random time value between spread * mean and spread * mean */
1468 half_interval = GNUNET_TIME_relative_divide (mean, spread);
1470 max_rand_delay = GNUNET_TIME_UNIT_FOREVER_REL.rel_value_us / mean.rel_value_us * (2/spread);
1472 * Compute random value between (0 and 1) * round_interval
1473 * via multiplying round_interval with a 'fraction' (0 to value)/value
1475 rand_delay = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, max_rand_delay);
1476 ret = GNUNET_TIME_relative_multiply (mean, rand_delay);
1477 ret = GNUNET_TIME_relative_divide (ret, max_rand_delay);
1478 ret = GNUNET_TIME_relative_add (ret, half_interval);
1480 if (GNUNET_TIME_UNIT_FOREVER_REL.rel_value_us == ret.rel_value_us)
1481 LOG (GNUNET_ERROR_TYPE_WARNING,
1482 "Returning FOREVER_REL\n");
1489 * Send single pull request
1491 * @param peer_id the peer to send the pull request to.
1494 send_pull_request (const struct GNUNET_PeerIdentity *peer)
1496 struct GNUNET_MQ_Envelope *ev;
1498 GNUNET_assert (GNUNET_NO == Peers_check_peer_flag (peer,
1499 Peers_PULL_REPLY_PENDING));
1500 Peers_set_peer_flag (peer, Peers_PULL_REPLY_PENDING);
1502 LOG (GNUNET_ERROR_TYPE_DEBUG,
1503 "Going to send PULL REQUEST to peer %s.\n",
1506 ev = GNUNET_MQ_msg_header (GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REQUEST);
1507 Peers_send_message (peer, ev, "PULL REQUEST");
1514 * @param peer_id the peer to send the push to.
1517 send_push (const struct GNUNET_PeerIdentity *peer_id)
1519 struct GNUNET_MQ_Envelope *ev;
1521 LOG (GNUNET_ERROR_TYPE_DEBUG,
1522 "Going to send PUSH to peer %s.\n",
1523 GNUNET_i2s (peer_id));
1525 ev = GNUNET_MQ_msg_header (GNUNET_MESSAGE_TYPE_RPS_PP_PUSH);
1526 Peers_send_message (peer_id, ev, "PUSH");
1531 do_round (void *cls);
1534 do_mal_round (void *cls);
1537 #ifdef ENABLE_MALICIOUS
1539 * Turn RPS service to act malicious.
1541 * @param cls Closure
1542 * @param client The client that sent the message
1543 * @param msg The message header
1546 handle_client_act_malicious (void *cls,
1547 struct GNUNET_SERVER_Client *client,
1548 const struct GNUNET_MessageHeader *msg)
1550 struct GNUNET_RPS_CS_ActMaliciousMessage *in_msg;
1551 struct GNUNET_PeerIdentity *peers;
1552 uint32_t num_mal_peers_sent;
1553 uint32_t num_mal_peers_old;
1555 /* Check for protocol violation */
1556 if (sizeof (struct GNUNET_RPS_CS_ActMaliciousMessage) > ntohs (msg->size))
1558 GNUNET_break_op (0);
1561 in_msg = (struct GNUNET_RPS_CS_ActMaliciousMessage *) msg;
1562 if ((ntohs (msg->size) - sizeof (struct GNUNET_RPS_CS_ActMaliciousMessage)) /
1563 sizeof (struct GNUNET_PeerIdentity) != ntohl (in_msg->num_peers))
1565 LOG (GNUNET_ERROR_TYPE_ERROR,
1566 "message says it sends %" PRIu32 " peers, have space for %lu peers\n",
1567 ntohl (in_msg->num_peers),
1568 (ntohs (msg->size) - sizeof (struct GNUNET_RPS_CS_ActMaliciousMessage)) /
1569 sizeof (struct GNUNET_PeerIdentity));
1570 GNUNET_break_op (0);
1574 /* Do actual logic */
1575 peers = (struct GNUNET_PeerIdentity *) &msg[1];
1576 mal_type = ntohl (in_msg->type);
1577 if (NULL == mal_peer_set)
1578 mal_peer_set = GNUNET_CONTAINER_multipeermap_create (1, GNUNET_NO);
1580 LOG (GNUNET_ERROR_TYPE_DEBUG,
1581 "Now acting malicious type %" PRIu32 ", got %" PRIu32 " peers.\n",
1583 ntohl (in_msg->num_peers));
1586 { /* Try to maximise representation */
1587 /* Add other malicious peers to those we already know */
1589 num_mal_peers_sent = ntohl (in_msg->num_peers);
1590 num_mal_peers_old = num_mal_peers;
1591 GNUNET_array_grow (mal_peers,
1593 num_mal_peers + num_mal_peers_sent);
1594 memcpy (&mal_peers[num_mal_peers_old],
1596 num_mal_peers_sent * sizeof (struct GNUNET_PeerIdentity));
1598 /* Add all mal peers to mal_peer_set */
1599 add_peer_array_to_set (&mal_peers[num_mal_peers_old],
1603 /* Substitute do_round () with do_mal_round () */
1604 GNUNET_SCHEDULER_cancel (do_round_task);
1605 do_round_task = GNUNET_SCHEDULER_add_now (&do_mal_round, NULL);
1608 else if ( (2 == mal_type) ||
1610 { /* Try to partition the network */
1611 /* Add other malicious peers to those we already know */
1613 num_mal_peers_sent = ntohl (in_msg->num_peers) - 1;
1614 num_mal_peers_old = num_mal_peers;
1615 GNUNET_array_grow (mal_peers,
1617 num_mal_peers + num_mal_peers_sent);
1618 if (NULL != mal_peers &&
1621 memcpy (&mal_peers[num_mal_peers_old],
1623 num_mal_peers_sent * sizeof (struct GNUNET_PeerIdentity));
1625 /* Add all mal peers to mal_peer_set */
1626 add_peer_array_to_set (&mal_peers[num_mal_peers_old],
1631 /* Store the one attacked peer */
1632 memcpy (&attacked_peer,
1633 &in_msg->attacked_peer,
1634 sizeof (struct GNUNET_PeerIdentity));
1635 /* Set the flag of the attacked peer to valid to avoid problems */
1636 if (GNUNET_NO == Peers_check_peer_known (&attacked_peer))
1638 (void) Peers_issue_peer_liveliness_check (&attacked_peer);
1641 LOG (GNUNET_ERROR_TYPE_DEBUG,
1642 "Attacked peer is %s\n",
1643 GNUNET_i2s (&attacked_peer));
1645 /* Substitute do_round () with do_mal_round () */
1646 GNUNET_SCHEDULER_cancel (do_round_task);
1647 do_round_task = GNUNET_SCHEDULER_add_now (&do_mal_round, NULL);
1649 else if (0 == mal_type)
1650 { /* Stop acting malicious */
1651 GNUNET_array_grow (mal_peers, num_mal_peers, 0);
1653 /* Substitute do_mal_round () with do_round () */
1654 GNUNET_SCHEDULER_cancel (do_round_task);
1655 do_round_task = GNUNET_SCHEDULER_add_now (&do_round, NULL);
1661 GNUNET_SERVER_receive_done (client,
1667 * Send out PUSHes and PULLs maliciously.
1669 * This is executed regylary.
1672 do_mal_round (void *cls)
1674 uint32_t num_pushes;
1676 struct GNUNET_TIME_Relative time_next_round;
1677 struct AttackedPeer *tmp_att_peer;
1679 LOG (GNUNET_ERROR_TYPE_DEBUG,
1680 "Going to execute next round maliciously type %" PRIu32 ".\n",
1682 do_round_task = NULL;
1683 GNUNET_assert (mal_type <= 3);
1684 /* Do malicious actions */
1686 { /* Try to maximise representation */
1688 /* The maximum of pushes we're going to send this round */
1689 num_pushes = GNUNET_MIN (GNUNET_MIN (push_limit,
1690 num_attacked_peers),
1691 GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE);
1693 LOG (GNUNET_ERROR_TYPE_DEBUG,
1694 "Going to send %" PRIu32 " pushes\n",
1697 /* Send PUSHes to attacked peers */
1698 for (i = 0 ; i < num_pushes ; i++)
1700 if (att_peers_tail == att_peer_index)
1701 att_peer_index = att_peers_head;
1703 att_peer_index = att_peer_index->next;
1705 send_push (&att_peer_index->peer_id);
1708 /* Send PULLs to some peers to learn about additional peers to attack */
1709 tmp_att_peer = att_peer_index;
1710 for (i = 0 ; i < num_pushes * alpha ; i++)
1712 if (att_peers_tail == tmp_att_peer)
1713 tmp_att_peer = att_peers_head;
1715 att_peer_index = tmp_att_peer->next;
1717 send_pull_request (&tmp_att_peer->peer_id);
1722 else if (2 == mal_type)
1724 * Try to partition the network
1725 * Send as many pushes to the attacked peer as possible
1726 * That is one push per round as it will ignore more.
1728 (void) Peers_issue_peer_liveliness_check (&attacked_peer);
1729 if (GNUNET_YES == Peers_check_peer_valid (&attacked_peer))
1730 send_push (&attacked_peer);
1735 { /* Combined attack */
1737 /* Send PUSH to attacked peers */
1738 if (GNUNET_YES == Peers_check_peer_known (&attacked_peer))
1740 (void) Peers_issue_peer_liveliness_check (&attacked_peer);
1741 if (GNUNET_YES == Peers_check_peer_valid (&attacked_peer))
1743 LOG (GNUNET_ERROR_TYPE_DEBUG,
1744 "Goding to send push to attacked peer (%s)\n",
1745 GNUNET_i2s (&attacked_peer));
1746 send_push (&attacked_peer);
1749 (void) Peers_issue_peer_liveliness_check (&attacked_peer);
1751 /* The maximum of pushes we're going to send this round */
1752 num_pushes = GNUNET_MIN (GNUNET_MIN (push_limit - 1,
1753 num_attacked_peers),
1754 GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE);
1756 LOG (GNUNET_ERROR_TYPE_DEBUG,
1757 "Going to send %" PRIu32 " pushes\n",
1760 for (i = 0; i < num_pushes; i++)
1762 if (att_peers_tail == att_peer_index)
1763 att_peer_index = att_peers_head;
1765 att_peer_index = att_peer_index->next;
1767 send_push (&att_peer_index->peer_id);
1770 /* Send PULLs to some peers to learn about additional peers to attack */
1771 tmp_att_peer = att_peer_index;
1772 for (i = 0; i < num_pushes * alpha; i++)
1774 if (att_peers_tail == tmp_att_peer)
1775 tmp_att_peer = att_peers_head;
1777 att_peer_index = tmp_att_peer->next;
1779 send_pull_request (&tmp_att_peer->peer_id);
1783 /* Schedule next round */
1784 time_next_round = compute_rand_delay (round_interval, 2);
1786 //do_round_task = GNUNET_SCHEDULER_add_delayed (round_interval, &do_mal_round,
1788 GNUNET_assert (NULL == do_round_task);
1789 do_round_task = GNUNET_SCHEDULER_add_delayed (time_next_round,
1790 &do_mal_round, NULL);
1791 LOG (GNUNET_ERROR_TYPE_DEBUG, "Finished round\n");
1793 #endif /* ENABLE_MALICIOUS */
1797 * Send out PUSHes and PULLs, possibly update #view, samplers.
1799 * This is executed regylary.
1802 do_round (void *cls)
1805 const struct GNUNET_PeerIdentity *view_array;
1806 unsigned int *permut;
1807 unsigned int a_peers; /* Number of peers we send pushes to */
1808 unsigned int b_peers; /* Number of peers we send pull requests to */
1809 uint32_t first_border;
1810 uint32_t second_border;
1811 struct GNUNET_PeerIdentity peer;
1812 struct GNUNET_PeerIdentity *update_peer;
1814 LOG (GNUNET_ERROR_TYPE_DEBUG,
1815 "Going to execute next round.\n");
1816 do_round_task = NULL;
1817 LOG (GNUNET_ERROR_TYPE_DEBUG,
1818 "Printing view:\n");
1819 to_file (file_name_view_log,
1820 "___ new round ___");
1821 view_array = View_get_as_array ();
1822 for (i = 0; i < View_size (); i++)
1824 LOG (GNUNET_ERROR_TYPE_DEBUG,
1825 "\t%s\n", GNUNET_i2s (&view_array[i]));
1826 to_file (file_name_view_log,
1828 GNUNET_i2s_full (&view_array[i]));
1832 /* Send pushes and pull requests */
1833 if (0 < View_size ())
1835 permut = GNUNET_CRYPTO_random_permute (GNUNET_CRYPTO_QUALITY_STRONG,
1839 a_peers = ceil (alpha * View_size ());
1841 LOG (GNUNET_ERROR_TYPE_DEBUG,
1842 "Going to send pushes to %u (ceil (%f * %u)) peers.\n",
1843 a_peers, alpha, View_size ());
1844 for (i = 0; i < a_peers; i++)
1846 peer = view_array[permut[i]];
1847 if (0 != GNUNET_CRYPTO_cmp_peer_identity (&own_identity, &peer)) // TODO
1848 { // FIXME if this fails schedule/loop this for later
1853 /* Send PULL requests */
1854 b_peers = ceil (beta * View_size ());
1855 first_border = a_peers;
1856 second_border = a_peers + b_peers;
1857 if (second_border > View_size ())
1859 first_border = View_size () - b_peers;
1860 second_border = View_size ();
1862 LOG (GNUNET_ERROR_TYPE_DEBUG,
1863 "Going to send pulls to %u (ceil (%f * %u)) peers.\n",
1864 b_peers, beta, View_size ());
1865 for (i = first_border; i < second_border; i++)
1867 peer = view_array[permut[i]];
1868 if (0 != GNUNET_CRYPTO_cmp_peer_identity (&own_identity, &peer) &&
1869 GNUNET_NO == Peers_check_peer_flag (&peer, Peers_PULL_REPLY_PENDING)) // TODO
1870 { // FIXME if this fails schedule/loop this for later
1871 send_pull_request (&peer);
1875 GNUNET_free (permut);
1881 /* TODO see how many peers are in push-/pull- list! */
1883 if ((CustomPeerMap_size (push_map) <= alpha * View_size ()) &&
1884 (0 < CustomPeerMap_size (push_map)) &&
1885 (0 < CustomPeerMap_size (pull_map)))
1886 { /* If conditions for update are fulfilled, update */
1887 LOG (GNUNET_ERROR_TYPE_DEBUG, "Update of the view.\n");
1889 uint32_t final_size;
1890 uint32_t peers_to_clean_size;
1891 struct GNUNET_PeerIdentity *peers_to_clean;
1893 peers_to_clean = NULL;
1894 peers_to_clean_size = 0;
1895 GNUNET_array_grow (peers_to_clean, peers_to_clean_size, View_size ());
1896 memcpy (peers_to_clean,
1898 View_size () * sizeof (struct GNUNET_PeerIdentity));
1900 /* Seems like recreating is the easiest way of emptying the peermap */
1902 to_file (file_name_view_log,
1905 first_border = GNUNET_MIN (ceil (alpha * sampler_size_est_need),
1906 CustomPeerMap_size (push_map));
1907 second_border = first_border +
1908 GNUNET_MIN (floor (beta * sampler_size_est_need),
1909 CustomPeerMap_size (pull_map));
1910 final_size = second_border +
1911 ceil ((1 - (alpha + beta)) * sampler_size_est_need);
1913 /* Update view with peers received through PUSHes */
1914 permut = GNUNET_CRYPTO_random_permute (GNUNET_CRYPTO_QUALITY_STRONG,
1915 CustomPeerMap_size (push_map));
1916 for (i = 0; i < first_border; i++)
1918 (void) insert_in_view (CustomPeerMap_get_peer_by_index (push_map,
1920 to_file (file_name_view_log,
1922 GNUNET_i2s_full (&view_array[i]));
1923 // TODO change the peer_flags accordingly
1925 GNUNET_free (permut);
1928 /* Update view with peers received through PULLs */
1929 permut = GNUNET_CRYPTO_random_permute (GNUNET_CRYPTO_QUALITY_STRONG,
1930 CustomPeerMap_size (pull_map));
1931 for (i = first_border; i < second_border; i++)
1933 (void) insert_in_view (CustomPeerMap_get_peer_by_index (pull_map,
1934 permut[i - first_border]));
1935 to_file (file_name_view_log,
1937 GNUNET_i2s_full (&view_array[i]));
1938 // TODO change the peer_flags accordingly
1940 GNUNET_free (permut);
1943 /* Update view with peers from history */
1944 RPS_sampler_get_n_rand_peers (prot_sampler,
1947 final_size - second_border);
1948 // TODO change the peer_flags accordingly
1950 for (i = 0; i < View_size (); i++)
1951 rem_from_list (&peers_to_clean, &peers_to_clean_size, &view_array[i]);
1953 /* Clean peers that were removed from the view */
1954 for (i = 0; i < peers_to_clean_size; i++)
1956 to_file (file_name_view_log,
1958 GNUNET_i2s_full (&peers_to_clean[i]));
1959 Peers_clean_peer (&peers_to_clean[i]);
1960 //peer_destroy_channel_send (sender);
1963 GNUNET_array_grow (peers_to_clean, peers_to_clean_size, 0);
1964 peers_to_clean = NULL;
1968 LOG (GNUNET_ERROR_TYPE_DEBUG, "No update of the view.\n");
1970 // TODO independent of that also get some peers from CADET_get_peers()?
1972 LOG (GNUNET_ERROR_TYPE_DEBUG,
1973 "Received %u pushes and %u pulls last round (alpha (%.2f) * view_size (%u) = %.2f)\n",
1974 CustomPeerMap_size (push_map),
1975 CustomPeerMap_size (pull_map),
1978 alpha * View_size ());
1980 /* Update samplers */
1981 for (i = 0; i < CustomPeerMap_size (push_map); i++)
1983 update_peer = CustomPeerMap_get_peer_by_index (push_map, i);
1984 LOG (GNUNET_ERROR_TYPE_DEBUG,
1985 "Updating with peer %s from push list\n",
1986 GNUNET_i2s (update_peer));
1987 insert_in_sampler (NULL, update_peer);
1988 Peers_clean_peer (update_peer); /* This cleans only if it is not in the view */
1989 //peer_destroy_channel_send (sender);
1992 for (i = 0; i < CustomPeerMap_size (pull_map); i++)
1994 LOG (GNUNET_ERROR_TYPE_DEBUG,
1995 "Updating with peer %s from pull list\n",
1996 GNUNET_i2s (CustomPeerMap_get_peer_by_index (pull_map, i)));
1997 insert_in_sampler (NULL, CustomPeerMap_get_peer_by_index (pull_map, i));
1998 /* This cleans only if it is not in the view */
1999 Peers_clean_peer (CustomPeerMap_get_peer_by_index (pull_map, i));
2000 //peer_destroy_channel_send (sender);
2004 /* Empty push/pull lists */
2005 CustomPeerMap_clear (push_map);
2006 CustomPeerMap_clear (pull_map);
2008 struct GNUNET_TIME_Relative time_next_round;
2010 time_next_round = compute_rand_delay (round_interval, 2);
2012 /* Schedule next round */
2013 do_round_task = GNUNET_SCHEDULER_add_delayed (time_next_round,
2015 LOG (GNUNET_ERROR_TYPE_DEBUG, "Finished round\n");
2020 rps_start (struct GNUNET_SERVER_Handle *server);
2024 * This is called from GNUNET_CADET_get_peers().
2026 * It is called on every peer(ID) that cadet somehow has contact with.
2027 * We use those to initialise the sampler.
2030 init_peer_cb (void *cls,
2031 const struct GNUNET_PeerIdentity *peer,
2032 int tunnel, // "Do we have a tunnel towards this peer?"
2033 unsigned int n_paths, // "Number of known paths towards this peer"
2034 unsigned int best_path) // "How long is the best path?
2035 // (0 = unknown, 1 = ourselves, 2 = neighbor)"
2039 LOG (GNUNET_ERROR_TYPE_DEBUG,
2040 "Got peer_id %s from cadet\n",
2047 * @brief Iterator function over stored, valid peers.
2049 * We initialise the sampler with those.
2051 * @param cls the closure
2052 * @param peer the peer id
2053 * @return #GNUNET_YES if we should continue to
2055 * #GNUNET_NO if not.
2058 valid_peers_iterator (void *cls,
2059 const struct GNUNET_PeerIdentity *peer)
2063 LOG (GNUNET_ERROR_TYPE_DEBUG,
2064 "Got stored, valid peer %s\n",
2073 * Iterator over peers from peerinfo.
2075 * @param cls closure
2076 * @param peer id of the peer, NULL for last call
2077 * @param hello hello message for the peer (can be NULL)
2078 * @param error message
2081 process_peerinfo_peers (void *cls,
2082 const struct GNUNET_PeerIdentity *peer,
2083 const struct GNUNET_HELLO_Message *hello,
2084 const char *err_msg)
2088 LOG (GNUNET_ERROR_TYPE_DEBUG,
2089 "Got peer_id %s from peerinfo\n",
2097 * Task run during shutdown.
2102 shutdown_task (void *cls)
2104 LOG (GNUNET_ERROR_TYPE_DEBUG,
2105 "RPS is going down\n");
2106 GNUNET_PEERINFO_notify_cancel (peerinfo_notify_handle);
2107 GNUNET_PEERINFO_disconnect (peerinfo_handle);
2109 if (NULL != do_round_task)
2111 GNUNET_SCHEDULER_cancel (do_round_task);
2112 do_round_task = NULL;
2117 GNUNET_NSE_disconnect (nse);
2118 RPS_sampler_destroy (prot_sampler);
2119 RPS_sampler_destroy (client_sampler);
2120 GNUNET_CADET_disconnect (cadet_handle);
2122 CustomPeerMap_destroy (push_map);
2123 CustomPeerMap_destroy (pull_map);
2124 #ifdef ENABLE_MALICIOUS
2125 struct AttackedPeer *tmp_att_peer;
2126 GNUNET_free (file_name_view_log);
2127 GNUNET_array_grow (mal_peers, num_mal_peers, 0);
2128 if (NULL != mal_peer_set)
2129 GNUNET_CONTAINER_multipeermap_destroy (mal_peer_set);
2130 if (NULL != att_peer_set)
2131 GNUNET_CONTAINER_multipeermap_destroy (att_peer_set);
2132 while (NULL != att_peers_head)
2134 tmp_att_peer = att_peers_head;
2135 GNUNET_CONTAINER_DLL_remove (att_peers_head, att_peers_tail, tmp_att_peer);
2137 #endif /* ENABLE_MALICIOUS */
2142 * @brief Get informed about a connecting client.
2145 * @param client the client that connects
2148 handle_client_connect (void *cls,
2149 struct GNUNET_SERVER_Client *client)
2151 struct ClientContext *cli_ctx;
2153 LOG (GNUNET_ERROR_TYPE_DEBUG,
2154 "Client connected\n");
2156 return; /* Server was destroyed before a client connected. Shutting down */
2157 cli_ctx = GNUNET_new (struct ClientContext);
2158 cli_ctx->mq = GNUNET_MQ_queue_for_server_client (client);
2159 GNUNET_SERVER_client_set_user_context (client, cli_ctx);
2160 GNUNET_CONTAINER_DLL_insert (cli_ctx_head,
2166 * A client disconnected. Remove all of its data structure entries.
2168 * @param cls closure, NULL
2169 * @param client identification of the client
2172 handle_client_disconnect (void *cls,
2173 struct GNUNET_SERVER_Client *client)
2175 struct ClientContext *cli_ctx;
2178 {/* shutdown task */
2179 while (NULL != cli_ctx_head)
2180 destroy_cli_ctx (cli_ctx_head);
2184 cli_ctx = GNUNET_SERVER_client_get_user_context (client, struct ClientContext);
2185 destroy_cli_ctx (cli_ctx);
2191 * Actually start the service.
2194 rps_start (struct GNUNET_SERVER_Handle *server)
2196 static const struct GNUNET_SERVER_MessageHandler handlers[] = {
2197 {&handle_client_request, NULL, GNUNET_MESSAGE_TYPE_RPS_CS_REQUEST,
2198 sizeof (struct GNUNET_RPS_CS_RequestMessage)},
2199 {&handle_client_request_cancel, NULL, GNUNET_MESSAGE_TYPE_RPS_CS_REQUEST_CANCEL,
2200 sizeof (struct GNUNET_RPS_CS_RequestCancelMessage)},
2201 {&handle_client_seed, NULL, GNUNET_MESSAGE_TYPE_RPS_CS_SEED, 0},
2202 #ifdef ENABLE_MALICIOUS
2203 {&handle_client_act_malicious, NULL, GNUNET_MESSAGE_TYPE_RPS_ACT_MALICIOUS , 0},
2204 #endif /* ENABLE_MALICIOUS */
2208 GNUNET_SERVER_add_handlers (server, handlers);
2209 GNUNET_SERVER_connect_notify (server,
2210 &handle_client_connect,
2212 GNUNET_SERVER_disconnect_notify (server,
2213 &handle_client_disconnect,
2215 LOG (GNUNET_ERROR_TYPE_INFO, "Ready to receive requests from clients\n");
2218 do_round_task = GNUNET_SCHEDULER_add_now (&do_round, NULL);
2219 LOG (GNUNET_ERROR_TYPE_DEBUG, "Scheduled first round\n");
2221 GNUNET_SCHEDULER_add_shutdown (&shutdown_task,
2227 * Process statistics requests.
2229 * @param cls closure
2230 * @param server the initialized server
2231 * @param c configuration to use
2235 struct GNUNET_SERVER_Handle *server,
2236 const struct GNUNET_CONFIGURATION_Handle *c)
2240 char* fn_valid_peers;
2242 GNUNET_log_setup ("rps", GNUNET_error_type_to_string (GNUNET_ERROR_TYPE_DEBUG), NULL);
2247 GNUNET_CRYPTO_get_peer_identity (cfg, &own_identity); // TODO check return value
2248 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2249 "STARTING SERVICE (rps) for peer [%s]\n",
2250 GNUNET_i2s (&own_identity));
2251 #ifdef ENABLE_MALICIOUS
2252 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
2253 "Malicious execution compiled in.\n");
2254 #endif /* ENABLE_MALICIOUS */
2258 /* Get time interval from the configuration */
2259 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_time (cfg, "RPS",
2263 GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
2264 "RPS", "ROUNDINTERVAL");
2265 GNUNET_SCHEDULER_shutdown ();
2269 /* Get initial size of sampler/view from the configuration */
2271 GNUNET_CONFIGURATION_get_value_number (cfg, "RPS", "INITSIZE",
2272 (long long unsigned int *) &sampler_size_est_need))
2274 GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
2276 GNUNET_SCHEDULER_shutdown ();
2279 LOG (GNUNET_ERROR_TYPE_DEBUG, "INITSIZE is %u\n", sampler_size_est_need);
2282 GNUNET_CONFIGURATION_get_value_filename (cfg,
2284 "FILENAME_VALID_PEERS",
2287 GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
2288 "rps", "FILENAME_VALID_PEERS");
2294 /* file_name_view_log */
2295 if (GNUNET_OK != GNUNET_DISK_directory_create ("/tmp/rps/"))
2297 LOG (GNUNET_ERROR_TYPE_WARNING,
2298 "Failed to create directory /tmp/rps/\n");
2301 size = (14 + strlen (GNUNET_i2s_full (&own_identity)) + 1) * sizeof (char);
2302 file_name_view_log = GNUNET_malloc (size);
2303 out_size = GNUNET_snprintf (file_name_view_log,
2306 GNUNET_i2s_full (&own_identity));
2307 if (size < out_size ||
2310 LOG (GNUNET_ERROR_TYPE_WARNING,
2311 "Failed to write string to buffer (size: %i, out_size: %i)\n",
2317 /* connect to NSE */
2318 nse = GNUNET_NSE_connect (cfg, nse_callback, NULL);
2325 /* Initialise cadet */
2326 static const struct GNUNET_CADET_MessageHandler cadet_handlers[] = {
2327 {&handle_peer_push , GNUNET_MESSAGE_TYPE_RPS_PP_PUSH ,
2328 sizeof (struct GNUNET_MessageHeader)},
2329 {&handle_peer_pull_request, GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REQUEST,
2330 sizeof (struct GNUNET_MessageHeader)},
2331 {&handle_peer_pull_reply , GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REPLY , 0},
2334 const uint32_t ports[] = {GNUNET_RPS_CADET_PORT, 0}; // _PORT specified in src/rps/rps.h
2335 cadet_handle = GNUNET_CADET_connect (cfg,
2337 &Peers_handle_inbound_channel,
2338 &cleanup_destroyed_channel,
2342 peerinfo_handle = GNUNET_PEERINFO_connect (cfg);
2343 Peers_initialise (fn_valid_peers, cadet_handle, &own_identity);
2344 GNUNET_free (fn_valid_peers);
2346 /* Initialise sampler */
2347 struct GNUNET_TIME_Relative half_round_interval;
2348 struct GNUNET_TIME_Relative max_round_interval;
2350 half_round_interval = GNUNET_TIME_relative_multiply (round_interval, .5);
2351 max_round_interval = GNUNET_TIME_relative_add (round_interval, half_round_interval);
2353 prot_sampler = RPS_sampler_init (sampler_size_est_need, max_round_interval);
2354 client_sampler = RPS_sampler_mod_init (sampler_size_est_need, max_round_interval);
2356 /* Initialise push and pull maps */
2357 push_map = CustomPeerMap_create (4);
2358 pull_map = CustomPeerMap_create (4);
2361 LOG (GNUNET_ERROR_TYPE_DEBUG, "Requesting peers from CADET\n");
2362 GNUNET_CADET_get_peers (cadet_handle, &init_peer_cb, NULL);
2363 // TODO send push/pull to each of those peers?
2364 // TODO read stored valid peers from last run
2365 LOG (GNUNET_ERROR_TYPE_DEBUG, "Requesting stored valid peers\n");
2366 Peers_get_valid_peers (valid_peers_iterator, NULL);
2368 peerinfo_notify_handle = GNUNET_PEERINFO_notify (cfg,
2370 process_peerinfo_peers,
2378 * The main function for the rps service.
2380 * @param argc number of arguments from the command line
2381 * @param argv command line arguments
2382 * @return 0 ok, 1 on error
2385 main (int argc, char *const *argv)
2387 return (GNUNET_OK ==
2388 GNUNET_SERVICE_run (argc,
2391 GNUNET_SERVICE_OPTION_NONE,
2392 &run, NULL)) ? 0 : 1;
2395 /* end of gnunet-service-rps.c */